/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2015. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/*
* Description: High level timers implementing BIF timers
* as well as process and port timers.
*
* Author: Rickard Green
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "sys.h"
#include "global.h"
#include "bif.h"
#include "erl_bif_unique.h"
#define ERTS_WANT_TIMER_WHEEL_API
#include "erl_time.h"
#include "erl_hl_timer.h"
#define ERTS_TMR_CHECK_CANCEL_ON_CREATE 0
#if 0
# define ERTS_HLT_HARD_DEBUG
#endif
#if 0
# define ERTS_HLT_DEBUG
#endif
#if defined(ERTS_HLT_HARD_DEBUG) || defined(DEBUG)
# if defined(ERTS_HLT_HARD_DEBUG)
# undef ERTS_RBT_HARD_DEBUG
# define ERTS_RBT_HARD_DEBUG 1
# endif
# ifndef ERTS_HLT_DEBUG
# define ERTS_HLT_DEBUG 1
# endif
#endif
#undef ERTS_HLT_ASSERT
#if defined(ERTS_HLT_DEBUG)
# define ERTS_HLT_ASSERT(E) ERTS_ASSERT(E)
# undef ERTS_RBT_DEBUG
# define ERTS_RBT_DEBUG
#else
# define ERTS_HLT_ASSERT(E) ((void) 1)
#endif
#if defined(ERTS_HLT_HARD_DEBUG) && defined(__GNUC__)
#warning "* * * * * * * * * * * * * * * * * *"
#warning "* ERTS_HLT_HARD_DEBUG IS ENABLED! *"
#warning "* * * * * * * * * * * * * * * * * *"
#endif
#ifdef ERTS_HLT_HARD_DEBUG
# define ERTS_HLT_HDBG_CHK_SRV(SRV) hdbg_chk_srv((SRV))
static void hdbg_chk_srv(ErtsHLTimerService *srv);
#else
# define ERTS_HLT_HDBG_CHK_SRV(SRV) ((void) 1)
#endif
#if ERTS_REF_NUMBERS != 3
#error "ERTS_REF_NUMBERS changed. Update me..."
#endif
typedef enum {
ERTS_TMR_BIF,
ERTS_TMR_PROC,
ERTS_TMR_PORT,
ERTS_TMR_CALLBACK
} ErtsTmrType;
#define ERTS_BIF_TIMER_SHORT_TIME 5000
#ifdef ERTS_SMP
# define ERTS_HLT_SMP_MEMBAR_LoadLoad_LoadStore \
ETHR_MEMBAR(ETHR_LoadLoad|ETHR_LoadStore)
#else
# define ERTS_HLT_SMP_MEMBAR_LoadLoad_LoadStore
#endif
/* Bit 0 to 9 contains scheduler id (see mask below) */
#define ERTS_TMR_ROFLG_HLT (((Uint32) 1) << 10)
#define ERTS_TMR_ROFLG_BIF_TMR (((Uint32) 1) << 11)
#define ERTS_TMR_ROFLG_PRE_ALC (((Uint32) 1) << 12)
#define ERTS_TMR_ROFLG_REG_NAME (((Uint32) 1) << 13)
#define ERTS_TMR_ROFLG_PROC (((Uint32) 1) << 14)
#define ERTS_TMR_ROFLG_PORT (((Uint32) 1) << 15)
#define ERTS_TMR_ROFLG_CALLBACK (((Uint32) 1) << 16)
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
#define ERTS_TMR_ROFLG_ABIF_TMR (((Uint32) 1) << 17)
#endif
#define ERTS_TMR_ROFLG_SID_MASK \
(ERTS_TMR_ROFLG_HLT - (Uint32) 1)
#define ERTS_TMR_STATE_ACTIVE ((erts_aint32_t) 0)
#define ERTS_TMR_STATE_CANCELED ((erts_aint32_t) 1)
#define ERTS_TMR_STATE_TIMED_OUT ((erts_aint32_t) 2)
typedef struct ErtsHLTimer_ ErtsHLTimer;
#define ERTS_HLT_PFLG_RED (((UWord) 1) << 0)
#define ERTS_HLT_PFLG_SAME_TIME (((UWord) 1) << 1)
#define ERTS_HLT_PFLGS_MASK \
(ERTS_HLT_PFLG_RED|ERTS_HLT_PFLG_SAME_TIME)
#define ERTS_HLT_PFIELD_NOT_IN_TABLE (~((UWord) 0))
typedef struct {
UWord parent; /* parent pointer and flags... */
union {
struct {
ErtsHLTimer *right;
ErtsHLTimer *left;
} t;
struct {
ErtsHLTimer *prev;
ErtsHLTimer *next;
} l;
} u;
ErtsHLTimer *same_time;
} ErtsHLTimerTimeTree;
typedef struct {
UWord parent; /* parent pointer and flags... */
ErtsHLTimer *right;
ErtsHLTimer *left;
} ErtsHLTimerTree;
typedef struct {
Uint32 roflgs;
erts_smp_atomic32_t refc;
union {
void *arg;
erts_atomic_t next;
} u;
} ErtsTmrHead;
struct ErtsHLTimer_ {
ErtsTmrHead head; /* NEED to be first! */
union {
ErtsThrPrgrLaterOp cleanup;
ErtsHLTimerTimeTree tree;
} time;
ErtsMonotonicTime timeout;
union {
Process *proc;
Port *port;
Eterm name;
void (*callback)(void *);
} receiver;
#ifdef ERTS_HLT_HARD_DEBUG
int pending_timeout;
#endif
erts_smp_atomic32_t state;
/* BIF timer only fields follow... */
struct {
Uint32 refn[ERTS_REF_NUMBERS];
ErtsHLTimerTree proc_tree;
ErtsHLTimerTree tree;
Eterm message;
ErlHeapFragment *bp;
} btm;
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
struct {
Eterm accessor;
ErtsHLTimerTree tree;
} abtm;
#endif
};
#define ERTS_HL_PTIMER_SIZE offsetof(ErtsHLTimer, btm)
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
#define ERTS_BIF_TIMER_SIZE offsetof(ErtsHLTimer, abtm)
#define ERTS_ABIF_TIMER_SIZE sizeof(ErtsHLTimer)
#else
#define ERTS_BIF_TIMER_SIZE sizeof(ErtsHLTimer)
#endif
typedef struct {
ErtsTmrHead head; /* NEED to be first! */
union {
void *p;
void (*callback)(void *);
} u;
ErtsTWheelTimer tw_tmr;
} ErtsTWTimer;
typedef union {
ErtsTmrHead head;
ErtsHLTimer hlt;
ErtsTWTimer twt;
} ErtsTimer;
#ifdef SMALL_MEMORY
#define BIF_TIMER_PREALC_SZ 10
#define PTIMER_PREALC_SZ 10
#else
#define BIF_TIMER_PREALC_SZ 100
#define PTIMER_PREALC_SZ 100
#endif
ERTS_SCHED_PREF_PALLOC_IMPL(bif_timer_pre,
ErtsHLTimer,
BIF_TIMER_PREALC_SZ)
ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(tw_timer,
ErtsTWTimer,
PTIMER_PREALC_SZ,
ERTS_ALC_T_LL_PTIMER)
#ifdef ERTS_HLT_DEBUG
#define ERTS_TMR_TIMEOUT_YIELD_LIMIT 5
#else
#define ERTS_TMR_TIMEOUT_YIELD_LIMIT 100
#endif
#define ERTS_TMR_CANCELED_TIMER_LIMIT 100
#define ERTS_TMR_CANCELED_TIMER_SMALL_LIMIT 5
#define ERTS_TMR_TIMEOUT_YIELD_STATE_T same_time_list_yield_state_t
#define ERTS_TMR_YIELDING_TIMEOUT_STATE_INITER {NULL, {0}}
typedef struct {
int dummy;
} ERTS_TMR_TIMEOUT_YIELD_STATE_T;
typedef struct {
ErtsTmrHead marker;
erts_atomic_t last;
} ErtsHLTCncldTmrQTail;
#ifdef ERTS_SMP
typedef struct {
/*
* This structure needs to be cache line aligned for best
* performance.
*/
union {
/*
* Modified by threads returning canceled
* timers to this timer service.
*/
ErtsHLTCncldTmrQTail data;
char align__[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(
sizeof(ErtsHLTCncldTmrQTail))];
} tail;
/*
* Everything below this point is *only* accessed by the
* thread managing this timer service.
*/
struct {
ErtsTimer *first;
ErtsTimer *unref_end;
struct {
ErtsThrPrgrVal thr_progress;
int thr_progress_reached;
ErtsTimer *unref_end;
} next;
int used_marker;
} head;
} ErtsHLTCncldTmrQ;
#endif /* ERTS_SMP */
typedef struct {
ErtsHLTimer *root;
ERTS_TMR_TIMEOUT_YIELD_STATE_T state;
} ErtsYieldingTimeoutState;
struct ErtsHLTimerService_ {
#ifdef ERTS_SMP
ErtsHLTCncldTmrQ canceled_queue;
#endif
ErtsHLTimer *time_tree;
ErtsHLTimer *btm_tree;
ErtsHLTimer *next_timeout;
ErtsYieldingTimeoutState yield;
ErtsTWheelTimer service_timer;
};
static ERTS_INLINE int
refn_is_lt(Uint32 *x, Uint32 *y)
{
/* !0 if x < y */
if (x[2] < y[2])
return 1;
if (x[2] != y[2])
return 0;
if (x[1] < y[1])
return 1;
if (x[1] != y[1])
return 0;
return x[0] < y[0];
}
#define ERTS_RBT_PREFIX time
#define ERTS_RBT_T ErtsHLTimer
#define ERTS_RBT_KEY_T ErtsMonotonicTime
#define ERTS_RBT_FLAGS_T UWord
#define ERTS_RBT_INIT_EMPTY_TNODE(T) \
do { \
(T)->time.tree.parent = (UWord) NULL; \
(T)->time.tree.u.t.right = NULL; \
(T)->time.tree.u.t.left = NULL; \
} while (0)
#define ERTS_RBT_IS_RED(T) \
((int) ((T)->time.tree.parent & ERTS_HLT_PFLG_RED))
#define ERTS_RBT_SET_RED(T) \
((T)->time.tree.parent |= ERTS_HLT_PFLG_RED)
#define ERTS_RBT_IS_BLACK(T) \
(!ERTS_RBT_IS_RED((T)))
#define ERTS_RBT_SET_BLACK(T) \
((T)->time.tree.parent &= ~ERTS_HLT_PFLG_RED)
#define ERTS_RBT_GET_FLAGS(T) \
((T)->time.tree.parent & ERTS_HLT_PFLGS_MASK)
#define ERTS_RBT_SET_FLAGS(T, F) \
do { \
ERTS_HLT_ASSERT((((UWord) (F)) & ~ERTS_HLT_PFLGS_MASK) == 0); \
(T)->time.tree.parent &= ~ERTS_HLT_PFLGS_MASK; \
(T)->time.tree.parent |= (F); \
} while (0)
#define ERTS_RBT_GET_PARENT(T) \
((ErtsHLTimer *) ((T)->time.tree.parent & ~ERTS_HLT_PFLGS_MASK))
#define ERTS_RBT_SET_PARENT(T, P) \
do { \
ERTS_HLT_ASSERT((((UWord) (P)) & ERTS_HLT_PFLGS_MASK) == 0); \
(T)->time.tree.parent &= ERTS_HLT_PFLGS_MASK; \
(T)->time.tree.parent |= (UWord) (P); \
} while (0)
#define ERTS_RBT_GET_RIGHT(T) ((T)->time.tree.u.t.right)
#define ERTS_RBT_SET_RIGHT(T, R) ((T)->time.tree.u.t.right = (R))
#define ERTS_RBT_GET_LEFT(T) ((T)->time.tree.u.t.left)
#define ERTS_RBT_SET_LEFT(T, L) ((T)->time.tree.u.t.left = (L))
#define ERTS_RBT_GET_KEY(T) ((T)->timeout)
#define ERTS_RBT_IS_LT(KX, KY) ((KX) < (KY))
#define ERTS_RBT_IS_EQ(KX, KY) ((KX) == (KY))
#define ERTS_RBT_WANT_DELETE
#define ERTS_RBT_WANT_SMALLEST
#define ERTS_RBT_WANT_LOOKUP_INSERT
#define ERTS_RBT_WANT_REPLACE
#define ERTS_RBT_WANT_FOREACH
#ifdef ERTS_HLT_HARD_DEBUG
# define ERTS_RBT_WANT_LOOKUP
#endif
#define ERTS_RBT_UNDEF
#include "erl_rbtree.h"
/* Use circular list for timers at same time */
static ERTS_INLINE void
same_time_list_insert(ErtsHLTimer **root, ErtsHLTimer *tmr)
{
ErtsHLTimer *first = *root;
if (!first) {
ERTS_HLT_ASSERT((((UWord) root) & ERTS_HLT_PFLG_SAME_TIME) == 0);
tmr->time.tree.parent = ((UWord) root) | ERTS_HLT_PFLG_SAME_TIME;
tmr->time.tree.u.l.next = tmr;
tmr->time.tree.u.l.prev = tmr;
*root = tmr;
}
else {
tmr->time.tree.parent = ERTS_HLT_PFLG_SAME_TIME;
tmr->time.tree.u.l.next = first;
tmr->time.tree.u.l.prev = first->time.tree.u.l.prev;
first->time.tree.u.l.prev = tmr;
tmr->time.tree.u.l.prev->time.tree.u.l.next = tmr;
}
}
static ERTS_INLINE void
same_time_list_delete(ErtsHLTimer *tmr)
{
ErtsHLTimer **root, *next;
root = (ErtsHLTimer **) (tmr->time.tree.parent & ~ERTS_HLT_PFLG_SAME_TIME);
next = tmr->time.tree.u.l.next;
ERTS_HLT_ASSERT((tmr->time.tree.parent
== (((UWord) root) | ERTS_HLT_PFLG_SAME_TIME))
|| (tmr->time.tree.parent
== ERTS_HLT_PFLG_SAME_TIME));
if (next == tmr) {
ERTS_HLT_ASSERT(root && *root == tmr);
ERTS_HLT_ASSERT(tmr->time.tree.u.l.prev == tmr);
*root = NULL;
}
else {
if (root) {
ERTS_HLT_ASSERT(*root == tmr);
*root = next;
next->time.tree.parent = ((UWord) root) | ERTS_HLT_PFLG_SAME_TIME;
}
tmr->time.tree.u.l.next->time.tree.u.l.prev = tmr->time.tree.u.l.prev;
tmr->time.tree.u.l.prev->time.tree.u.l.next = next;
}
}
static ERTS_INLINE void
same_time_list_new_root(ErtsHLTimer **root)
{
ErtsHLTimer *tmr = *root;
if (tmr) {
ERTS_HLT_ASSERT(root);
tmr->time.tree.parent = ((UWord) root) | ERTS_HLT_PFLG_SAME_TIME;
}
}
static ERTS_INLINE int
same_time_list_foreach_destroy_yielding(ErtsHLTimer **root,
void (*op)(ErtsHLTimer *, void *),
void *arg,
ERTS_TMR_TIMEOUT_YIELD_STATE_T *ys,
Sint ylimit)
{
Sint ycnt = ylimit;
ErtsHLTimer *end, *tmr = *root;
if (!tmr)
return 0;
ERTS_HLT_ASSERT(tmr->time.tree.parent
== (((UWord) root) | ERTS_HLT_PFLG_SAME_TIME));
end = tmr->time.tree.u.l.prev;
end->time.tree.u.l.next = NULL;
while (1) {
ErtsHLTimer *op_tmr = tmr;
ERTS_HLT_ASSERT((tmr->time.tree.parent
== (((UWord) root) | ERTS_HLT_PFLG_SAME_TIME))
|| (tmr->time.tree.parent
== ERTS_HLT_PFLG_SAME_TIME));
tmr = tmr->time.tree.u.l.next;
(*op)(op_tmr, arg);
if (!tmr) {
*root = NULL;
return 0;
}
if (--ycnt <= 0) {
/* Make new circle of timers left to process... */
*root = tmr;
end->time.tree.u.l.next = tmr;
tmr->time.tree.u.l.prev = end;
tmr->time.tree.parent = ((UWord) root) | ERTS_HLT_PFLG_SAME_TIME;
return 1;
}
}
}
static ERTS_INLINE void
same_time_list_foreach(ErtsHLTimer *root,
void (*op)(ErtsHLTimer *, void *),
void *arg)
{
if (root) {
ErtsHLTimer *tmr = root;
do {
(*op)(tmr, arg);
tmr = tmr->time.tree.u.l.next;
} while (root != tmr);
}
}
#ifdef ERTS_HLT_HARD_DEBUG
static ERTS_INLINE ErtsHLTimer *
same_time_list_lookup(ErtsHLTimer *root, ErtsHLTimer *x)
{
if (root) {
ErtsHLTimer *tmr = root;
do {
if (tmr == x)
return tmr;
tmr = tmr->time.tree.u.l.next;
} while (root != tmr);
}
return NULL;
}
#endif /* ERTS_HLT_HARD_DEBUG */
#define ERTS_RBT_PREFIX btm
#define ERTS_RBT_T ErtsHLTimer
#define ERTS_RBT_KEY_T Uint32 *
#define ERTS_RBT_FLAGS_T UWord
#define ERTS_RBT_INIT_EMPTY_TNODE(T) \
do { \
(T)->btm.tree.parent = (UWord) NULL; \
(T)->btm.tree.right = NULL; \
(T)->btm.tree.left = NULL; \
} while (0)
#define ERTS_RBT_IS_RED(T) \
((int) ((T)->btm.tree.parent & ERTS_HLT_PFLG_RED))
#define ERTS_RBT_SET_RED(T) \
((T)->btm.tree.parent |= ERTS_HLT_PFLG_RED)
#define ERTS_RBT_IS_BLACK(T) \
(!ERTS_RBT_IS_RED((T)))
#define ERTS_RBT_SET_BLACK(T) \
((T)->btm.tree.parent &= ~ERTS_HLT_PFLG_RED)
#define ERTS_RBT_GET_FLAGS(T) \
((T)->btm.tree.parent & ERTS_HLT_PFLGS_MASK)
#define ERTS_RBT_SET_FLAGS(T, F) \
do { \
ERTS_HLT_ASSERT((((UWord) (F)) & ~ERTS_HLT_PFLGS_MASK) == 0); \
(T)->btm.tree.parent &= ~ERTS_HLT_PFLGS_MASK; \
(T)->btm.tree.parent |= (F); \
} while (0)
#define ERTS_RBT_GET_PARENT(T) \
((ErtsHLTimer *) ((T)->btm.tree.parent & ~ERTS_HLT_PFLGS_MASK))
#define ERTS_RBT_SET_PARENT(T, P) \
do { \
ERTS_HLT_ASSERT((((UWord) (P)) & ERTS_HLT_PFLGS_MASK) == 0); \
(T)->btm.tree.parent &= ERTS_HLT_PFLGS_MASK; \
(T)->btm.tree.parent |= (UWord) (P); \
} while (0)
#define ERTS_RBT_GET_RIGHT(T) ((T)->btm.tree.right)
#define ERTS_RBT_SET_RIGHT(T, R) ((T)->btm.tree.right = (R))
#define ERTS_RBT_GET_LEFT(T) ((T)->btm.tree.left)
#define ERTS_RBT_SET_LEFT(T, L) ((T)->btm.tree.left = (L))
#define ERTS_RBT_GET_KEY(T) ((T)->btm.refn)
#define ERTS_RBT_IS_LT(KX, KY) refn_is_lt((KX), (KY))
#define ERTS_RBT_IS_EQ(KX, KY) \
(((KX)[0] == (KY)[0]) & ((KX)[1] == (KY)[1]) & ((KX)[2] == (KY)[2]))
#define ERTS_RBT_WANT_DELETE
#define ERTS_RBT_WANT_INSERT
#define ERTS_RBT_WANT_LOOKUP
#define ERTS_RBT_WANT_FOREACH
#define ERTS_RBT_UNDEF
#include "erl_rbtree.h"
#define ERTS_RBT_PREFIX proc_btm
#define ERTS_RBT_T ErtsHLTimer
#define ERTS_RBT_KEY_T Uint32 *
#define ERTS_RBT_FLAGS_T UWord
#define ERTS_RBT_INIT_EMPTY_TNODE(T) \
do { \
(T)->btm.proc_tree.parent = (UWord) NULL; \
(T)->btm.proc_tree.right = NULL; \
(T)->btm.proc_tree.left = NULL; \
} while (0)
#define ERTS_RBT_IS_RED(T) \
((int) ((T)->btm.proc_tree.parent & ERTS_HLT_PFLG_RED))
#define ERTS_RBT_SET_RED(T) \
((T)->btm.proc_tree.parent |= ERTS_HLT_PFLG_RED)
#define ERTS_RBT_IS_BLACK(T) \
(!ERTS_RBT_IS_RED((T)))
#define ERTS_RBT_SET_BLACK(T) \
((T)->btm.proc_tree.parent &= ~ERTS_HLT_PFLG_RED)
#define ERTS_RBT_GET_FLAGS(T) \
((T)->btm.proc_tree.parent & ERTS_HLT_PFLGS_MASK)
#define ERTS_RBT_SET_FLAGS(T, F) \
do { \
ERTS_HLT_ASSERT((((UWord) (F)) & ~ERTS_HLT_PFLGS_MASK) == 0); \
(T)->btm.proc_tree.parent &= ~ERTS_HLT_PFLGS_MASK; \
(T)->btm.proc_tree.parent |= (F); \
} while (0)
#define ERTS_RBT_GET_PARENT(T) \
((ErtsHLTimer *) ((T)->btm.proc_tree.parent & ~ERTS_HLT_PFLGS_MASK))
#define ERTS_RBT_SET_PARENT(T, P) \
do { \
ERTS_HLT_ASSERT((((UWord) (P)) & ERTS_HLT_PFLGS_MASK) == 0); \
(T)->btm.proc_tree.parent &= ERTS_HLT_PFLGS_MASK; \
(T)->btm.proc_tree.parent |= (UWord) (P); \
} while (0)
#define ERTS_RBT_GET_RIGHT(T) ((T)->btm.proc_tree.right)
#define ERTS_RBT_SET_RIGHT(T, R) ((T)->btm.proc_tree.right = (R))
#define ERTS_RBT_GET_LEFT(T) ((T)->btm.proc_tree.left)
#define ERTS_RBT_SET_LEFT(T, L) ((T)->btm.proc_tree.left = (L))
#define ERTS_RBT_GET_KEY(T) ((T)->btm.refn)
#define ERTS_RBT_IS_LT(KX, KY) refn_is_lt((KX), (KY))
#define ERTS_RBT_IS_EQ(KX, KY) \
(((KX)[0] == (KY)[0]) & ((KX)[1] == (KY)[1]) & ((KX)[2] == (KY)[2]))
#define ERTS_RBT_WANT_DELETE
#define ERTS_RBT_WANT_INSERT
#define ERTS_RBT_WANT_LOOKUP
#define ERTS_RBT_WANT_FOREACH_DESTROY_YIELDING
#define ERTS_RBT_UNDEF
#include "erl_rbtree.h"
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
#define ERTS_RBT_PREFIX abtm
#define ERTS_RBT_T ErtsHLTimer
#define ERTS_RBT_KEY_T Uint32 *
#define ERTS_RBT_FLAGS_T UWord
#define ERTS_RBT_INIT_EMPTY_TNODE(T) \
do { \
(T)->abtm.tree.parent = (UWord) NULL; \
(T)->abtm.tree.right = NULL; \
(T)->abtm.tree.left = NULL; \
} while (0)
#define ERTS_RBT_IS_RED(T) \
((int) ((T)->abtm.tree.parent & ERTS_HLT_PFLG_RED))
#define ERTS_RBT_SET_RED(T) \
((T)->abtm.tree.parent |= ERTS_HLT_PFLG_RED)
#define ERTS_RBT_IS_BLACK(T) \
(!ERTS_RBT_IS_RED((T)))
#define ERTS_RBT_SET_BLACK(T) \
((T)->abtm.tree.parent &= ~ERTS_HLT_PFLG_RED)
#define ERTS_RBT_GET_FLAGS(T) \
((T)->abtm.tree.parent & ERTS_HLT_PFLGS_MASK)
#define ERTS_RBT_SET_FLAGS(T, F) \
do { \
ERTS_HLT_ASSERT((((UWord) (F)) & ~ERTS_HLT_PFLGS_MASK) == 0); \
(T)->abtm.tree.parent &= ~ERTS_HLT_PFLGS_MASK; \
(T)->abtm.tree.parent |= (F); \
} while (0)
#define ERTS_RBT_GET_PARENT(T) \
((ErtsHLTimer *) ((T)->abtm.tree.parent & ~ERTS_HLT_PFLGS_MASK))
#define ERTS_RBT_SET_PARENT(T, P) \
do { \
ERTS_HLT_ASSERT((((UWord) (P)) & ERTS_HLT_PFLGS_MASK) == 0); \
(T)->abtm.tree.parent &= ERTS_HLT_PFLGS_MASK; \
(T)->abtm.tree.parent |= (UWord) (P); \
} while (0)
#define ERTS_RBT_GET_RIGHT(T) ((T)->abtm.tree.right)
#define ERTS_RBT_SET_RIGHT(T, R) ((T)->abtm.tree.right = (R))
#define ERTS_RBT_GET_LEFT(T) ((T)->abtm.tree.left)
#define ERTS_RBT_SET_LEFT(T, L) ((T)->abtm.tree.left = (L))
#define ERTS_RBT_GET_KEY(T) ((T)->btm.refn)
#define ERTS_RBT_IS_LT(KX, KY) refn_is_lt((KX), (KY))
#define ERTS_RBT_IS_EQ(KX, KY) \
(((KX)[0] == (KY)[0]) & ((KX)[1] == (KY)[1]) & ((KX)[2] == (KY)[2]))
#define ERTS_RBT_WANT_DELETE
#define ERTS_RBT_WANT_INSERT
#define ERTS_RBT_WANT_LOOKUP
#define ERTS_RBT_WANT_FOREACH_DESTROY_YIELDING
#define ERTS_RBT_UNDEF
#include "erl_rbtree.h"
#endif /* ERTS_BTM_ACCESSOR_SUPPORT */
#ifdef ERTS_SMP
static void init_canceled_queue(ErtsHLTCncldTmrQ *cq);
#endif
void
erts_hl_timer_init(void)
{
init_tw_timer_alloc();
init_bif_timer_pre_alloc();
}
ErtsHLTimerService *
erts_create_timer_service(void)
{
ErtsYieldingTimeoutState init_yield = ERTS_TMR_YIELDING_TIMEOUT_STATE_INITER;
ErtsHLTimerService *srv;
srv = erts_alloc_permanent_cache_aligned(ERTS_ALC_T_TIMER_SERVICE,
sizeof(ErtsHLTimerService));
srv->time_tree = NULL;
srv->btm_tree = NULL;
srv->next_timeout = NULL;
srv->yield = init_yield;
erts_twheel_init_timer(&srv->service_timer);
#ifdef ERTS_SMP
init_canceled_queue(&srv->canceled_queue);
#endif
return srv;
}
size_t
erts_timer_type_size(ErtsAlcType_t type)
{
switch (type) {
case ERTS_ALC_T_LL_PTIMER: return sizeof(ErtsTWTimer);
case ERTS_ALC_T_HL_PTIMER: return ERTS_HL_PTIMER_SIZE;
case ERTS_ALC_T_BIF_TIMER: return ERTS_BIF_TIMER_SIZE;
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
case ERTS_ALC_T_ABIF_TIMER: return ERTS_ABIF_TIMER_SIZE;
#endif
default: ERTS_INTERNAL_ERROR("Unknown type");
}
return 0;
}
static ERTS_INLINE ErtsMonotonicTime
get_timeout_pos(ErtsMonotonicTime now, ErtsMonotonicTime msec)
{
ErtsMonotonicTime timeout_pos;
if (msec <= 0)
return ERTS_MONOTONIC_TO_CLKTCKS(now);
timeout_pos = ERTS_MONOTONIC_TO_CLKTCKS(now-1);
timeout_pos += ERTS_MSEC_TO_CLKTCKS(msec) + 1;
return timeout_pos;
}
static ERTS_INLINE Sint64
get_time_left(ErtsSchedulerData *esdp, ErtsMonotonicTime timeout_pos)
{
ErtsMonotonicTime now = erts_get_monotonic_time(esdp);
now = ERTS_MONOTONIC_TO_CLKTCKS(now-1)+1;
if (timeout_pos <= now)
return (Sint64) 0;
return (Sint64) ERTS_CLKTCKS_TO_MSEC(timeout_pos - now);
}
static ERTS_INLINE int
proc_timeout_common(Process *proc, void *tmr)
{
if (tmr == (void *) erts_smp_atomic_cmpxchg_mb(&proc->common.timer,
ERTS_PTMR_TIMEDOUT,
(erts_aint_t) tmr)) {
erts_aint32_t state;
erts_smp_proc_lock(proc, ERTS_PROC_LOCKS_MSG_RECEIVE);
state = erts_smp_atomic32_read_acqb(&proc->state);
erts_smp_proc_unlock(proc, ERTS_PROC_LOCKS_MSG_RECEIVE);
if (!(state & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_EXITING)))
erts_schedule_process(proc, state, 0);
return 1;
}
return 0;
}
static ERTS_INLINE int
port_timeout_common(Port *port, void *tmr)
{
if (tmr == (void *) erts_smp_atomic_cmpxchg_mb(&port->common.timer,
ERTS_PTMR_TIMEDOUT,
(erts_aint_t) tmr)) {
erts_port_task_schedule(port->common.id,
&port->timeout_task,
ERTS_PORT_TASK_TIMEOUT);
return 1;
}
return 0;
}
/*
* Basic timer wheel timer stuff
*/
static void
scheduled_tw_timer_destroy(void *vtmr)
{
tw_timer_free((ErtsTWTimer *) vtmr);
}
static void
schedule_tw_timer_destroy(ErtsTWTimer *tmr)
{
/*
* Reference to process/port can be
* dropped at once...
*/
if (tmr->head.roflgs & ERTS_TMR_ROFLG_PROC)
erts_proc_dec_refc((Process *) tmr->u.p);
else if (tmr->head.roflgs & ERTS_TMR_ROFLG_PORT)
erts_port_dec_refc((Port *) tmr->u.p);
erts_schedule_thr_prgr_later_cleanup_op(
scheduled_tw_timer_destroy,
(void *) tmr,
&tmr->tw_tmr.u.cleanup,
sizeof(ErtsTWTimer));
}
static ERTS_INLINE void
tw_timer_dec_refc(ErtsTWTimer *tmr)
{
if (erts_smp_atomic32_dec_read_relb(&tmr->head.refc) == 0) {
ERTS_HLT_SMP_MEMBAR_LoadLoad_LoadStore;
schedule_tw_timer_destroy(tmr);
}
}
static void
tw_proc_timeout(void *vtwtp)
{
ErtsTWTimer *twtp = (ErtsTWTimer *) vtwtp;
Process *proc = (Process *) twtp->u.p;
if (proc_timeout_common(proc, vtwtp))
tw_timer_dec_refc(twtp);
tw_timer_dec_refc(twtp);
}
static void
tw_port_timeout(void *vtwtp)
{
ErtsTWTimer *twtp = (ErtsTWTimer *) vtwtp;
Port *port = (Port *) twtp->u.p;
if (port_timeout_common(port, vtwtp))
tw_timer_dec_refc(twtp);
tw_timer_dec_refc(twtp);
}
static void
tw_ptimer_cancel(void *vtwtp)
{
tw_timer_dec_refc((ErtsTWTimer *) vtwtp);
}
static void
cancel_tw_timer(ErtsSchedulerData *esdp, ErtsTWTimer *tmr)
{
ERTS_HLT_ASSERT((tmr->head.roflgs & ERTS_TMR_ROFLG_SID_MASK)
== (Uint32) esdp->no);
erts_twheel_cancel_timer(esdp->timer_wheel, &tmr->tw_tmr);
}
static void
tw_callback_timeout(void *vtwtp)
{
ErtsTWTimer *twtp = (ErtsTWTimer *) vtwtp;
void (*callback)(void *) = twtp->u.callback;
void *arg = twtp->head.u.arg;
tw_timer_dec_refc(twtp);
(*callback)(arg);
}
static ErtsTWTimer *
create_tw_timer(ErtsSchedulerData *esdp,
ErtsTmrType type, void *p,
void (*callback)(void *), void *arg,
ErtsMonotonicTime timeout_pos)
{
ErtsTWTimer *tmr;
void (*timeout_func)(void *);
void (*cancel_func)(void *);
erts_aint32_t refc;
tmr = tw_timer_alloc();
erts_twheel_init_timer(&tmr->tw_tmr);
tmr->head.roflgs = (Uint32) esdp->no;
ERTS_HLT_ASSERT((tmr->head.roflgs
& ~ERTS_TMR_ROFLG_SID_MASK) == 0);
switch (type) {
case ERTS_TMR_PROC:
tmr->u.p = p;
tmr->head.roflgs |= ERTS_TMR_ROFLG_PROC;
timeout_func = tw_proc_timeout;
cancel_func = tw_ptimer_cancel;
erts_proc_inc_refc((Process *) p);
refc = 2;
break;
case ERTS_TMR_PORT:
tmr->u.p = p;
tmr->head.roflgs |= ERTS_TMR_ROFLG_PORT;
timeout_func = tw_port_timeout;
cancel_func = tw_ptimer_cancel;
erts_port_inc_refc((Port *) p);
refc = 2;
break;
case ERTS_TMR_CALLBACK:
tmr->head.u.arg = arg;
tmr->u.callback = callback;
tmr->head.roflgs |= ERTS_TMR_ROFLG_CALLBACK;
timeout_func = tw_callback_timeout;
cancel_func = NULL;
refc = 1;
break;
default:
ERTS_INTERNAL_ERROR("Unsupported timer type");
return NULL;
}
erts_smp_atomic32_init_nob(&tmr->head.refc, refc);
erts_twheel_set_timer(esdp->timer_wheel,
&tmr->tw_tmr,
timeout_func,
cancel_func,
tmr,
timeout_pos);
return tmr;
}
/*
* Basic high level timer stuff
*/
static ERTS_INLINE void
hl_timer_destroy(ErtsHLTimer *tmr)
{
Uint32 roflgs = tmr->head.roflgs;
if (!(roflgs & ERTS_TMR_ROFLG_BIF_TMR))
erts_free(ERTS_ALC_T_HL_PTIMER, tmr);
else {
if (roflgs & ERTS_TMR_ROFLG_PRE_ALC)
bif_timer_pre_free(tmr);
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
else if (roflgs & ERTS_TMR_ROFLG_ABIF_TMR)
erts_free(ERTS_ALC_T_ABIF_TIMER, tmr);
#endif
else
erts_free(ERTS_ALC_T_BIF_TIMER, tmr);
}
}
static void
scheduled_hl_timer_destroy(void *vtmr)
{
hl_timer_destroy((ErtsHLTimer *) vtmr);
}
static void
schedule_hl_timer_destroy(ErtsHLTimer *tmr, Uint32 roflgs)
{
UWord size;
/*
* Reference to process/port can be dropped
* at once...
*/
ERTS_HLT_ASSERT(erts_smp_atomic32_read_nob(&tmr->head.refc) == 0);
if (roflgs & ERTS_TMR_ROFLG_REG_NAME) {
ERTS_HLT_ASSERT(is_atom(tmr->receiver.name));
}
else if (roflgs & ERTS_TMR_ROFLG_PROC) {
ERTS_HLT_ASSERT(tmr->receiver.proc);
erts_proc_dec_refc(tmr->receiver.proc);
}
else if (roflgs & ERTS_TMR_ROFLG_PORT) {
ERTS_HLT_ASSERT(tmr->receiver.port);
erts_port_dec_refc(tmr->receiver.port);
}
if (!(roflgs & ERTS_TMR_ROFLG_BIF_TMR))
size = ERTS_HL_PTIMER_SIZE;
else {
/*
* Message buffer can be dropped at
* once...
*/
size = sizeof(ErtsHLTimer);
}
erts_schedule_thr_prgr_later_cleanup_op(
scheduled_hl_timer_destroy, tmr,
&tmr->time.cleanup, size);
}
static ERTS_INLINE void
hl_timer_pre_dec_refc(ErtsHLTimer *tmr)
{
#ifdef ERTS_HLT_DEBUG
erts_aint_t refc;
refc = erts_smp_atomic32_dec_read_nob(&tmr->head.refc);
ERTS_HLT_ASSERT(refc > 0);
#else
erts_smp_atomic32_dec_nob(&tmr->head.refc);
#endif
}
static ERTS_INLINE void
hl_timer_dec_refc(ErtsHLTimer *tmr, Uint32 roflgs)
{
if (erts_smp_atomic32_dec_read_relb(&tmr->head.refc) == 0) {
ERTS_HLT_SMP_MEMBAR_LoadLoad_LoadStore;
schedule_hl_timer_destroy(tmr, roflgs);
}
}
static void hlt_service_timeout(void *vesdp);
#ifdef ERTS_SMP
static void handle_canceled_queue(ErtsSchedulerData *esdp,
ErtsHLTCncldTmrQ *cq,
int use_limit,
int ops_limit,
int *need_thr_progress,
ErtsThrPrgrVal *thr_prgr_p,
int *need_more_work);
#endif
static ERTS_INLINE void
check_canceled_queue(ErtsSchedulerData *esdp, ErtsHLTimerService *srv)
{
#if defined(ERTS_SMP) && ERTS_TMR_CHECK_CANCEL_ON_CREATE
ErtsHLTCncldTmrQ *cq = &srv->canceled_queue;
if (cq->head.first != cq->head.unref_end)
handle_canceled_queue(esdp, cq, 1,
ERTS_TMR_CANCELED_TIMER_SMALL_LIMIT,
NULL, NULL, NULL);
#endif
}
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
static void
hlt_delete_abtm(ErtsHLTimer *tmr)
{
Process *proc;
ERTS_HLT_ASSERT(tmr->head.roflgs & ERTS_TMR_ROFLG_ABIF_TMR);
proc = erts_proc_lookup(tmr->abtm.accessor);
if (proc) {
int deref = 0;
erts_smp_proc_lock(proc, ERTS_PROC_LOCK_BTM);
if (tmr->abtm.tree.parent != ERTS_HLT_PFIELD_NOT_IN_TABLE) {
abtm_rbt_delete(&proc->accessor_bif_timers, tmr);
deref = 1;
tmr->abtm.tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
}
erts_smp_proc_unlock(proc, ERTS_PROC_LOCK_BTM);
if (deref)
hl_timer_pre_dec_refc(tmr);
}
}
#endif
static ErtsHLTimer *
create_hl_timer(ErtsSchedulerData *esdp,
ErtsMonotonicTime timeout_pos,
int short_time, ErtsTmrType type,
void *rcvrp, Eterm rcvr, Eterm acsr,
Eterm msg, Uint32 *refn,
void (*callback)(void *), void *arg)
{
ErtsHLTimerService *srv = esdp->timer_service;
ErtsHLTimer *tmr, *st_tmr;
erts_aint32_t refc;
Uint32 roflgs;
ERTS_HLT_HDBG_CHK_SRV(srv);
check_canceled_queue(esdp, srv);
ERTS_HLT_ASSERT((esdp->no & ~ERTS_TMR_ROFLG_SID_MASK) == 0);
roflgs = ((Uint32) esdp->no) | ERTS_TMR_ROFLG_HLT;
if (type != ERTS_TMR_BIF) {
tmr = erts_alloc(ERTS_ALC_T_HL_PTIMER,
ERTS_HL_PTIMER_SIZE);
tmr->timeout = timeout_pos;
switch (type) {
case ERTS_TMR_PROC:
ERTS_HLT_ASSERT(is_internal_pid(rcvr));
erts_proc_inc_refc((Process *) rcvrp);
tmr->receiver.proc = (Process *) rcvrp;
roflgs |= ERTS_TMR_ROFLG_PROC;
refc = 2;
break;
case ERTS_TMR_PORT:
ERTS_HLT_ASSERT(is_internal_port(rcvr));
erts_port_inc_refc((Port *) rcvrp);
tmr->receiver.port = (Port *) rcvrp;
roflgs |= ERTS_TMR_ROFLG_PORT;
refc = 2;
break;
case ERTS_TMR_CALLBACK:
roflgs |= ERTS_TMR_ROFLG_CALLBACK;
tmr->receiver.callback = callback;
tmr->head.u.arg = arg;
refc = 1;
break;
default:
ERTS_INTERNAL_ERROR("Unsupported timer type");
return NULL;
}
}
else { /* ERTS_TMR_BIF */
Uint hsz;
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
int is_abif_tmr = is_value(acsr) && acsr != rcvr;
#endif
if (short_time) {
tmr = bif_timer_pre_alloc();
if (!tmr)
goto alloc_bif_timer;
roflgs |= ERTS_TMR_ROFLG_PRE_ALC;
}
else {
alloc_bif_timer:
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
if (is_abif_tmr)
tmr = erts_alloc(ERTS_ALC_T_ABIF_TIMER,
ERTS_ABIF_TIMER_SIZE);
else
#endif
tmr = erts_alloc(ERTS_ALC_T_BIF_TIMER,
ERTS_BIF_TIMER_SIZE);
}
tmr->timeout = timeout_pos;
roflgs |= ERTS_TMR_ROFLG_BIF_TMR;
if (is_internal_pid(rcvr)) {
roflgs |= ERTS_TMR_ROFLG_PROC;
tmr->receiver.proc = (Process *) rcvrp;
refc = 2;
}
else {
ERTS_HLT_ASSERT(is_atom(rcvr));
roflgs |= ERTS_TMR_ROFLG_REG_NAME;
tmr->receiver.name = rcvr;
refc = 1;
}
hsz = is_immed(msg) ? ((Uint) 0) : size_object(msg);
if (!hsz) {
tmr->btm.message = msg;
tmr->btm.bp = NULL;
}
else {
ErlHeapFragment *bp = new_message_buffer(hsz);
Eterm *hp = bp->mem;
tmr->btm.message = copy_struct(msg, hsz, &hp, &bp->off_heap);
tmr->btm.bp = bp;
}
tmr->btm.refn[0] = refn[0];
tmr->btm.refn[1] = refn[1];
tmr->btm.refn[2] = refn[2];
tmr->btm.proc_tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
if (is_abif_tmr) {
Process *aproc;
roflgs |= ERTS_TMR_ROFLG_ABIF_TMR;
tmr->abtm.accessor = acsr;
aproc = erts_proc_lookup(acsr);
if (!aproc)
tmr->abtm.tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
else {
refc++;
erts_smp_proc_lock(aproc, ERTS_PROC_LOCK_BTM);
abtm_rbt_insert(&aproc->accessor_bif_timers, tmr);
erts_smp_proc_unlock(aproc, ERTS_PROC_LOCK_BTM);
}
}
#endif
btm_rbt_insert(&srv->btm_tree, tmr);
}
tmr->head.roflgs = roflgs;
erts_smp_atomic32_init_nob(&tmr->head.refc, refc);
erts_smp_atomic32_init_nob(&tmr->state, ERTS_TMR_STATE_ACTIVE);
if (!srv->next_timeout
|| tmr->timeout < srv->next_timeout->timeout) {
if (srv->next_timeout)
erts_twheel_cancel_timer(esdp->timer_wheel,
&srv->service_timer);
erts_twheel_set_timer(esdp->timer_wheel,
&srv->service_timer,
hlt_service_timeout,
NULL,
(void *) esdp,
tmr->timeout);
srv->next_timeout = tmr;
}
st_tmr = time_rbt_lookup_insert(&srv->time_tree, tmr);
tmr->time.tree.same_time = st_tmr;
if (st_tmr)
same_time_list_insert(&st_tmr->time.tree.same_time, tmr);
#ifdef ERTS_HLT_HARD_DEBUG
tmr->pending_timeout = 0;
#endif
ERTS_HLT_HDBG_CHK_SRV(srv);
return tmr;
}
static ERTS_INLINE void
hlt_bif_timer_timeout(ErtsHLTimer *tmr, Uint32 roflgs)
{
ErtsProcLocks proc_locks = ERTS_PROC_LOCKS_MSG_SEND;
Process *proc;
int queued_message = 0;
int dec_refc = 0;
Uint32 is_reg_name = (roflgs & ERTS_TMR_ROFLG_REG_NAME);
ERTS_HLT_ASSERT(roflgs & ERTS_TMR_ROFLG_BIF_TMR);
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
if (tmr->head.roflgs & ERTS_TMR_ROFLG_ABIF_TMR)
hlt_delete_abtm(tmr);
#endif
if (is_reg_name) {
Eterm pid;
ERTS_HLT_ASSERT(is_atom(tmr->receiver.name));
pid = erts_whereis_name_to_id(NULL, tmr->receiver.name);
proc = erts_proc_lookup(pid);
}
else {
ERTS_HLT_ASSERT(roflgs & ERTS_TMR_ROFLG_PROC);
ERTS_HLT_ASSERT(tmr->receiver.proc);
proc = tmr->receiver.proc;
proc_locks |= ERTS_PROC_LOCK_BTM;
}
if (proc) {
erts_smp_proc_lock(proc, proc_locks);
/*
* If process is exiting, let it clean up
* the btm tree by itself (it may be in
* the middle of tree destruction).
*/
if (!ERTS_PROC_IS_EXITING(proc)) {
erts_queue_message(proc, &proc_locks, tmr->btm.bp,
tmr->btm.message, NIL);
erts_smp_proc_unlock(proc, ERTS_PROC_LOCKS_MSG_SEND);
queued_message = 1;
proc_locks &= ~ERTS_PROC_LOCKS_MSG_SEND;
tmr->btm.bp = NULL;
if (tmr->btm.proc_tree.parent != ERTS_HLT_PFIELD_NOT_IN_TABLE) {
proc_btm_rbt_delete(&proc->bif_timers, tmr);
tmr->btm.proc_tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
dec_refc = 1;
}
}
if (proc_locks)
erts_smp_proc_unlock(proc, proc_locks);
if (dec_refc)
hl_timer_pre_dec_refc(tmr);
}
if (!queued_message && tmr->btm.bp)
free_message_buffer(tmr->btm.bp);
}
static ERTS_INLINE void
hlt_proc_timeout(ErtsHLTimer *tmr)
{
if (proc_timeout_common(tmr->receiver.proc, (void *) tmr))
hl_timer_dec_refc(tmr, tmr->head.roflgs);
}
static ERTS_INLINE void
hlt_port_timeout(ErtsHLTimer *tmr)
{
if (port_timeout_common(tmr->receiver.port, (void *) tmr))
hl_timer_dec_refc(tmr, tmr->head.roflgs);
}
static void hlt_timeout(ErtsHLTimer *tmr, void *vsrv)
{
ErtsHLTimerService *srv = (ErtsHLTimerService *) vsrv;
Uint32 roflgs;
erts_aint32_t state;
ERTS_HLT_HDBG_CHK_SRV(srv);
roflgs = tmr->head.roflgs;
ERTS_HLT_ASSERT(roflgs & ERTS_TMR_ROFLG_HLT);
state = erts_smp_atomic32_cmpxchg_acqb(&tmr->state,
ERTS_TMR_STATE_TIMED_OUT,
ERTS_TMR_STATE_ACTIVE);
ERTS_HLT_ASSERT(state == ERTS_TMR_STATE_CANCELED
|| state == ERTS_TMR_STATE_ACTIVE);
if (state == ERTS_TMR_STATE_ACTIVE) {
if (roflgs & ERTS_TMR_ROFLG_BIF_TMR)
hlt_bif_timer_timeout(tmr, roflgs);
else if (roflgs & ERTS_TMR_ROFLG_PROC)
hlt_proc_timeout(tmr);
else if (roflgs & ERTS_TMR_ROFLG_PORT)
hlt_port_timeout(tmr);
else {
ERTS_HLT_ASSERT(roflgs & ERTS_TMR_ROFLG_CALLBACK);
(*tmr->receiver.callback)(tmr->head.u.arg);
}
}
tmr->time.tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
if ((roflgs & ERTS_TMR_ROFLG_BIF_TMR)
&& tmr->btm.tree.parent != ERTS_HLT_PFIELD_NOT_IN_TABLE) {
btm_rbt_delete(&srv->btm_tree, tmr);
tmr->btm.tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
}
ERTS_HLT_HDBG_CHK_SRV(srv);
hl_timer_dec_refc(tmr, roflgs);
}
#ifdef ERTS_HLT_HARD_DEBUG
static void
set_pending_timeout(ErtsHLTimer *tmr, void *unused)
{
tmr->pending_timeout = -1;
}
#endif
static void
hlt_service_timeout(void *vesdp)
{
ErtsSchedulerData *esdp = (ErtsSchedulerData *) vesdp;
ErtsHLTimerService *srv = esdp->timer_service;
ErtsHLTimer *tmr = srv->next_timeout;
int yield;
ERTS_HLT_HDBG_CHK_SRV(srv);
ERTS_HLT_ASSERT(esdp == erts_get_scheduler_data());
ERTS_HLT_ASSERT(!srv->yield.root || srv->yield.root == tmr);
ERTS_HLT_ASSERT(tmr);
ERTS_HLT_ASSERT(tmr->timeout <= erts_get_monotonic_time(esdp));
if (!srv->yield.root) {
ERTS_HLT_ASSERT(tmr->time.tree.parent
!= ERTS_HLT_PFIELD_NOT_IN_TABLE);
time_rbt_delete(&srv->time_tree, tmr);
tmr->time.tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
#ifdef ERTS_HLT_HARD_DEBUG
tmr->pending_timeout = 1;
if (tmr->time.tree.same_time)
same_time_list_foreach(tmr->time.tree.same_time, set_pending_timeout, NULL);
#endif
}
if (!tmr->time.tree.same_time && !srv->yield.root)
yield = 0;
else {
yield = same_time_list_foreach_destroy_yielding(
&tmr->time.tree.same_time, hlt_timeout, (void *) srv,
&srv->yield.state, ERTS_TMR_TIMEOUT_YIELD_LIMIT);
}
if (yield)
srv->yield.root = tmr;
else {
srv->yield.root = NULL;
hlt_timeout(tmr, (void *) srv);
tmr = time_rbt_smallest(srv->time_tree);
srv->next_timeout = tmr;
}
ERTS_HLT_HDBG_CHK_SRV(srv);
if (tmr)
erts_twheel_set_timer(esdp->timer_wheel,
&srv->service_timer,
hlt_service_timeout,
NULL,
vesdp,
tmr->timeout);
}
static void
hlt_delete_timer(ErtsSchedulerData *esdp, ErtsHLTimer *tmr)
{
ErtsHLTimerService *srv = esdp->timer_service;
ERTS_HLT_HDBG_CHK_SRV(srv);
if (tmr->head.roflgs & ERTS_TMR_ROFLG_BIF_TMR) {
if (tmr->btm.tree.parent != ERTS_HLT_PFIELD_NOT_IN_TABLE) {
btm_rbt_delete(&srv->btm_tree, tmr);
tmr->btm.tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
}
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
if (tmr->head.roflgs & ERTS_TMR_ROFLG_ABIF_TMR)
hlt_delete_abtm(tmr);
#endif
}
if (tmr->time.tree.parent == ERTS_HLT_PFIELD_NOT_IN_TABLE) {
/* Already removed... */
ERTS_HLT_HDBG_CHK_SRV(srv);
return;
}
if (tmr->time.tree.parent & ERTS_HLT_PFLG_SAME_TIME) {
same_time_list_delete(tmr);
}
else if (tmr->time.tree.same_time) {
ErtsHLTimer *st_container;
ERTS_HLT_ASSERT((tmr->time.tree.parent & ERTS_HLT_PFLG_SAME_TIME) == 0);
st_container = tmr->time.tree.same_time->time.tree.u.l.prev;
ERTS_HLT_ASSERT(st_container);
ERTS_HLT_ASSERT(st_container->time.tree.parent
& ERTS_HLT_PFLG_SAME_TIME);
ERTS_HLT_ASSERT(tmr->timeout == st_container->timeout);
same_time_list_delete(st_container);
st_container->time.tree.same_time = tmr->time.tree.same_time;
same_time_list_new_root(&st_container->time.tree.same_time);
time_rbt_replace(&srv->time_tree, tmr, st_container);
ERTS_HLT_ASSERT((st_container->time.tree.parent
& ERTS_HLT_PFLG_SAME_TIME) == 0);
if (srv->next_timeout == tmr)
srv->next_timeout = st_container;
}
else {
ERTS_HLT_ASSERT((tmr->time.tree.parent & ERTS_HLT_PFLG_SAME_TIME) == 0);
time_rbt_delete(&srv->time_tree, tmr);
if (tmr == srv->next_timeout) {
ErtsHLTimer *smlst;
erts_twheel_cancel_timer(esdp->timer_wheel,
&srv->service_timer);
smlst = time_rbt_smallest(srv->time_tree);
srv->next_timeout = smlst;
if (smlst) {
ERTS_HLT_ASSERT(smlst->timeout > tmr->timeout);
erts_twheel_set_timer(esdp->timer_wheel,
&srv->service_timer,
hlt_service_timeout,
NULL,
(void *) esdp,
smlst->timeout);
}
}
}
tmr->time.tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
hl_timer_dec_refc(tmr, tmr->head.roflgs);
ERTS_HLT_HDBG_CHK_SRV(srv);
}
/*
* Pass canceled timers back to originating scheduler
*/
static ERTS_INLINE void
cleanup_sched_local_canceled_timer(ErtsSchedulerData *esdp,
ErtsTimer *tmr)
{
Uint32 roflgs = tmr->head.roflgs;
ERTS_HLT_ASSERT(esdp == erts_get_scheduler_data());
ERTS_HLT_ASSERT((tmr->head.roflgs & ERTS_TMR_ROFLG_SID_MASK)
== (Uint32) esdp->no);
if (roflgs & ERTS_TMR_ROFLG_HLT) {
hlt_delete_timer(esdp, &tmr->hlt);
hl_timer_dec_refc(&tmr->hlt, roflgs);
}
else {
cancel_tw_timer(esdp, &tmr->twt);
tw_timer_dec_refc(&tmr->twt);
}
}
#ifdef ERTS_SMP
static void
init_canceled_queue(ErtsHLTCncldTmrQ *cq)
{
erts_atomic_init_nob(&cq->tail.data.marker.u.next, ERTS_AINT_NULL);
erts_atomic_init_nob(&cq->tail.data.last,
(erts_aint_t) &cq->tail.data.marker);
cq->head.first = (ErtsTimer *) &cq->tail.data.marker;
cq->head.unref_end = (ErtsTimer *) &cq->tail.data.marker;
cq->head.next.thr_progress = erts_thr_progress_current();
cq->head.next.thr_progress_reached = 1;
cq->head.next.unref_end = (ErtsTimer *) &cq->tail.data.marker;
cq->head.used_marker = 1;
}
static ERTS_INLINE int
cq_enqueue(ErtsHLTCncldTmrQ *cq, ErtsTimer *tmr, int cinit)
{
erts_aint_t itmp;
ErtsTimer *enq, *this = tmr;
erts_atomic_init_nob(&this->head.u.next, ERTS_AINT_NULL);
/* Enqueue at end of list... */
enq = (ErtsTimer *) erts_atomic_read_nob(&cq->tail.data.last);
itmp = erts_atomic_cmpxchg_relb(&enq->head.u.next,
(erts_aint_t) this,
ERTS_AINT_NULL);
if (itmp == ERTS_AINT_NULL) {
/* We are required to move last pointer */
#ifdef DEBUG
ASSERT(ERTS_AINT_NULL == erts_atomic_read_nob(&this->head.u.next));
ASSERT(((erts_aint_t) enq)
== erts_atomic_xchg_relb(&cq->tail.data.last,
(erts_aint_t) this));
#else
erts_atomic_set_relb(&cq->tail.data.last, (erts_aint_t) this);
#endif
return 1;
}
else {
/*
* We *need* to insert element somewhere in between the
* last element we read earlier and the actual last element.
*/
int i = cinit;
while (1) {
erts_aint_t itmp2;
erts_atomic_set_nob(&this->head.u.next, itmp);
itmp2 = erts_atomic_cmpxchg_relb(&enq->head.u.next,
(erts_aint_t) this,
itmp);
if (itmp == itmp2)
return 0; /* inserted this */
if ((i & 1) == 0)
itmp = itmp2;
else {
enq = (ErtsTimer *) itmp2;
itmp = erts_atomic_read_acqb(&enq->head.u.next);
ASSERT(itmp != ERTS_AINT_NULL);
}
i++;
}
}
}
static ERTS_INLINE erts_aint_t
check_insert_marker(ErtsHLTCncldTmrQ *cq, erts_aint_t ilast)
{
if (!cq->head.used_marker
&& cq->head.unref_end == (ErtsTimer *) ilast) {
erts_aint_t itmp;
ErtsTimer *last = (ErtsTimer *) ilast;
erts_atomic_init_nob(&cq->tail.data.marker.u.next, ERTS_AINT_NULL);
itmp = erts_atomic_cmpxchg_relb(&last->head.u.next,
(erts_aint_t) &cq->tail.data.marker,
ERTS_AINT_NULL);
if (itmp == ERTS_AINT_NULL) {
ilast = (erts_aint_t) &cq->tail.data.marker;
cq->head.used_marker = !0;
erts_atomic_set_relb(&cq->tail.data.last, ilast);
}
}
return ilast;
}
static ERTS_INLINE ErtsTimer *
cq_dequeue(ErtsHLTCncldTmrQ *cq)
{
ErtsTimer *tmr;
if (cq->head.first == cq->head.unref_end)
return NULL;
tmr = cq->head.first;
if (tmr == (ErtsTimer *) &cq->tail.data.marker) {
ASSERT(cq->head.used_marker);
cq->head.used_marker = 0;
tmr = (ErtsTimer *) erts_atomic_read_nob(&tmr->head.u.next);
if (tmr == cq->head.unref_end) {
cq->head.first = tmr;
return NULL;
}
}
cq->head.first = (ErtsTimer *) erts_atomic_read_nob(&tmr->head.u.next);
ASSERT(cq->head.first);
return tmr;
}
static int
cq_check_incoming(ErtsSchedulerData *esdp, ErtsHLTCncldTmrQ *cq)
{
erts_aint_t ilast = erts_atomic_read_nob(&cq->tail.data.last);
if (((ErtsTimer *) ilast) == (ErtsTimer *) &cq->tail.data.marker
&& cq->head.first == (ErtsTimer *) &cq->tail.data.marker) {
/* Nothing more to do... */
return 0;
}
if (cq->head.next.thr_progress_reached
|| erts_thr_progress_has_reached(cq->head.next.thr_progress)) {
cq->head.next.thr_progress_reached = 1;
/* Move unreferenced end pointer forward... */
ERTS_HLT_SMP_MEMBAR_LoadLoad_LoadStore;
cq->head.unref_end = cq->head.next.unref_end;
ilast = check_insert_marker(cq, ilast);
if (cq->head.unref_end != (ErtsTimer *) ilast) {
cq->head.next.unref_end = (ErtsTimer *) ilast;
cq->head.next.thr_progress = erts_thr_progress_later(esdp);
cq->head.next.thr_progress_reached = 0;
}
}
return 1;
}
static ERTS_INLINE void
store_earliest_thr_prgr(ErtsThrPrgrVal *prev_val, ErtsHLTCncldTmrQ *cq)
{
if (!cq->head.next.thr_progress_reached
&& (*prev_val == ERTS_THR_PRGR_INVALID
|| erts_thr_progress_cmp(cq->head.next.thr_progress,
*prev_val) < 0)) {
*prev_val = cq->head.next.thr_progress;
}
}
static void
handle_canceled_queue(ErtsSchedulerData *esdp,
ErtsHLTCncldTmrQ *cq,
int use_limit,
int ops_limit,
int *need_thr_progress,
ErtsThrPrgrVal *thr_prgr_p,
int *need_more_work)
{
int need_thr_prgr = 0;
int need_mr_wrk = 0;
int have_checked_incoming = 0;
int ops = 0;
ERTS_HLT_ASSERT(cq == &esdp->timer_service->canceled_queue);
while (1) {
ErtsTimer *tmr = cq_dequeue(cq);
if (tmr)
cleanup_sched_local_canceled_timer(esdp, tmr);
else {
if (have_checked_incoming)
break;
need_thr_prgr = cq_check_incoming(esdp, cq);
if (need_thr_progress) {
*need_thr_progress |= need_thr_prgr;
if (need_thr_prgr)
store_earliest_thr_prgr(thr_prgr_p, cq);
}
have_checked_incoming = 1;
continue;
}
if (use_limit && ++ops >= ops_limit) {
if (cq->head.first != cq->head.unref_end) {
need_mr_wrk = 1;
if (need_more_work)
*need_more_work |= 1;
}
break;
}
}
if (need_thr_progress && !(need_thr_prgr | need_mr_wrk)) {
need_thr_prgr = cq_check_incoming(esdp, cq);
*need_thr_progress |= need_thr_prgr;
if (need_thr_prgr)
store_earliest_thr_prgr(thr_prgr_p, cq);
}
}
void
erts_handle_canceled_timers(void *vesdp,
int *need_thr_progress,
ErtsThrPrgrVal *thr_prgr_p,
int *need_more_work)
{
ErtsSchedulerData *esdp = (ErtsSchedulerData *) vesdp;
ERTS_HLT_ASSERT(esdp == erts_get_scheduler_data());
handle_canceled_queue(esdp, &esdp->timer_service->canceled_queue,
1, ERTS_TMR_CANCELED_TIMER_LIMIT,
need_thr_progress, thr_prgr_p,
need_more_work);
}
#endif /* ERTS_SMP */
static void
queue_canceled_timer(ErtsSchedulerData *esdp, int rsched_id, ErtsTimer *tmr)
{
#ifdef ERTS_SMP
ErtsHLTCncldTmrQ *cq;
cq = &ERTS_SCHEDULER_IX(rsched_id-1)->timer_service->canceled_queue;
if (cq_enqueue(cq, tmr, rsched_id - (int) esdp->no))
erts_notify_canceled_timer(esdp, rsched_id);
#else
ERTS_INTERNAL_ERROR("Unexpected enqueue of canceled timer");
#endif
}
static void
continue_cancel_ptimer(ErtsSchedulerData *esdp, ErtsTimer *tmr)
{
#ifdef ERTS_SMP
Uint32 sid = (tmr->head.roflgs & ERTS_TMR_ROFLG_SID_MASK);
if (esdp->no != sid)
queue_canceled_timer(esdp, sid, tmr);
else
#endif
cleanup_sched_local_canceled_timer(esdp, tmr);
}
/*
* BIF timer specific
*/
Uint erts_bif_timer_memory_size(void)
{
return (Uint) 0;
}
static BIF_RETTYPE
setup_bif_timer(Process *c_p, ErtsMonotonicTime timeout_pos,
int short_time, Eterm rcvr, Eterm acsr,
Eterm msg, int wrap)
{
BIF_RETTYPE ret;
Eterm ref, tmo_msg, *hp;
ErtsHLTimer *tmr;
ErtsSchedulerData *esdp;
DeclareTmpHeap(tmp_hp, 4, c_p);
if (is_not_internal_pid(rcvr) && is_not_atom(rcvr))
goto badarg;
esdp = ERTS_PROC_GET_SCHDATA(c_p);
hp = HAlloc(c_p, REF_THING_SIZE);
ref = erts_sched_make_ref_in_buffer(esdp, hp);
ASSERT(erts_get_ref_numbers_thr_id(
internal_ref_numbers(ref)) == (Uint32) esdp->no);
UseTmpHeap(4, c_p);
tmo_msg = wrap ? TUPLE3(tmp_hp, am_timeout, ref, msg) : msg;
tmr = create_hl_timer(esdp, timeout_pos, short_time,
ERTS_TMR_BIF, NULL, rcvr, acsr, tmo_msg,
internal_ref_numbers(ref), NULL, NULL);
UnUseTmpHeap(4, c_p);
if (is_internal_pid(rcvr)) {
Process *proc = erts_pid2proc_opt(c_p, ERTS_PROC_LOCK_MAIN,
rcvr, ERTS_PROC_LOCK_BTM,
ERTS_P2P_FLG_INC_REFC);
if (!proc) {
if (tmr->btm.bp)
free_message_buffer(tmr->btm.bp);
hlt_delete_timer(esdp, tmr);
hl_timer_destroy(tmr);
}
else {
proc_btm_rbt_insert(&proc->bif_timers, tmr);
erts_smp_proc_unlock(proc, ERTS_PROC_LOCK_BTM);
tmr->receiver.proc = proc;
}
}
ERTS_BIF_PREP_RET(ret, ref);
return ret;
badarg:
ERTS_BIF_PREP_ERROR(ret, c_p, BADARG);
return ret;
}
static int
cancel_bif_timer(ErtsHLTimer *tmr)
{
erts_aint_t state;
Uint32 roflgs;
int res;
state = erts_smp_atomic32_cmpxchg_acqb(&tmr->state,
ERTS_TMR_STATE_CANCELED,
ERTS_TMR_STATE_ACTIVE);
if (state != ERTS_TMR_STATE_ACTIVE)
return 0;
if (tmr->btm.bp)
free_message_buffer(tmr->btm.bp);
res = -1;
roflgs = tmr->head.roflgs;
if (roflgs & ERTS_TMR_ROFLG_PROC) {
Process *proc = tmr->receiver.proc;
ERTS_HLT_ASSERT(!(tmr->head.roflgs & ERTS_TMR_ROFLG_REG_NAME));
erts_smp_proc_lock(proc, ERTS_PROC_LOCK_BTM);
/*
* If process is exiting, let it clean up
* the btm tree by itself (it may be in
* the middle of tree destruction).
*/
if (!ERTS_PROC_IS_EXITING(proc)
&& tmr->btm.proc_tree.parent != ERTS_HLT_PFIELD_NOT_IN_TABLE) {
proc_btm_rbt_delete(&proc->bif_timers, tmr);
tmr->btm.proc_tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
res = 1;
}
erts_smp_proc_unlock(proc, ERTS_PROC_LOCK_BTM);
}
return res;
}
static ERTS_INLINE Eterm
access_sched_local_btm(Process *c_p, Eterm pid,
Eterm tref, Uint32 *trefn,
Uint32 *rrefn,
int async, int cancel,
int return_res,
int info)
{
ErtsSchedulerData *esdp;
ErtsHLTimerService *srv;
ErtsHLTimer *tmr;
Sint64 time_left;
Process *proc;
ErtsProcLocks proc_locks;
time_left = -1;
if (!c_p)
esdp = erts_get_scheduler_data();
else {
esdp = ERTS_PROC_GET_SCHDATA(c_p);
ERTS_HLT_ASSERT(esdp == erts_get_scheduler_data());
}
ERTS_HLT_ASSERT(erts_get_ref_numbers_thr_id(trefn)
== (Uint32) esdp->no);
srv = esdp->timer_service;
tmr = btm_rbt_lookup(srv->btm_tree, trefn);
if (tmr) {
if (!cancel) {
erts_aint32_t state = erts_smp_atomic32_read_acqb(&tmr->state);
if (state == ERTS_TMR_STATE_ACTIVE)
time_left = get_time_left(esdp, tmr->timeout);
}
else {
int cncl_res = cancel_bif_timer(tmr);
if (cncl_res) {
time_left = get_time_left(esdp, tmr->timeout);
if (cncl_res > 0)
hl_timer_dec_refc(tmr, tmr->head.roflgs);
hlt_delete_timer(esdp, tmr);
}
}
}
if (!info)
return am_ok;
if (return_res) {
ERTS_HLT_ASSERT(c_p);
if (time_left < 0)
return am_false;
else if (time_left <= (Sint64) MAX_SMALL)
return make_small((Sint) time_left);
else {
Uint hsz = ERTS_SINT64_HEAP_SIZE(time_left);
Eterm *hp = HAlloc(c_p, hsz);
return erts_sint64_to_big(time_left, &hp);
}
}
if (c_p) {
proc = c_p;
proc_locks = ERTS_PROC_LOCK_MAIN;
}
else {
proc = erts_proc_lookup(pid);
proc_locks = 0;
}
if (proc) {
Uint hsz;
ErlOffHeap *ohp;
ErlHeapFragment* bp;
Eterm *hp, msg, ref, result;
#ifdef ERTS_HLT_DEBUG
Eterm *hp_end;
#endif
hsz = 3; /* 2-tuple */
if (!async)
hsz += REF_THING_SIZE;
else {
if (is_non_value(tref) || proc != c_p)
hsz += REF_THING_SIZE;
hsz += 1; /* upgrade to 3-tuple */
}
if (time_left > (Sint64) MAX_SMALL)
hsz += ERTS_SINT64_HEAP_SIZE(time_left);
if (proc == c_p) {
bp = NULL;
ohp = NULL;
hp = HAlloc(c_p, hsz);
}
else {
hp = erts_alloc_message_heap(hsz,
&bp,
&ohp,
proc,
&proc_locks);
}
#ifdef ERTS_HLT_DEBUG
hp_end = hp + hsz;
#endif
if (time_left < 0)
result = am_false;
else if (time_left <= (Sint64) MAX_SMALL)
result = make_small((Sint) time_left);
else
result = erts_sint64_to_big(time_left, &hp);
if (!async) {
write_ref_thing(hp,
rrefn[0],
rrefn[1],
rrefn[2]);
ref = make_internal_ref(hp);
hp += REF_THING_SIZE;
msg = TUPLE2(hp, ref, result);
ERTS_HLT_ASSERT(hp + 3 == hp_end);
}
else {
Eterm tag = cancel ? am_cancel_timer : am_read_timer;
if (is_value(tref) && proc == c_p)
ref = tref;
else {
write_ref_thing(hp,
trefn[0],
trefn[1],
trefn[2]);
ref = make_internal_ref(hp);
hp += REF_THING_SIZE;
}
msg = TUPLE3(hp, tag, ref, result);
ERTS_HLT_ASSERT(hp + 4 == hp_end);
}
erts_queue_message(proc, &proc_locks, bp, msg, NIL);
if (c_p)
proc_locks &= ~ERTS_PROC_LOCK_MAIN;
if (proc_locks)
erts_smp_proc_unlock(proc, proc_locks);
}
return am_ok;
}
#define ERTS_BTM_REQ_FLG_ASYNC (((Uint32) 1) << 0)
#define ERTS_BTM_REQ_FLG_CANCEL (((Uint32) 1) << 1)
#define ERTS_BTM_REQ_FLG_INFO (((Uint32) 1) << 2)
typedef struct {
Eterm pid;
Uint32 trefn[ERTS_REF_NUMBERS];
Uint32 rrefn[ERTS_REF_NUMBERS];
Uint32 flags;
} ErtsBifTimerRequest;
static void
bif_timer_access_request(void *vreq)
{
ErtsBifTimerRequest *req = (ErtsBifTimerRequest *) vreq;
int async = (int) (req->flags & ERTS_BTM_REQ_FLG_ASYNC);
int cancel = (int) (req->flags & ERTS_BTM_REQ_FLG_CANCEL);
int info = (int) (req->flags & ERTS_BTM_REQ_FLG_INFO);
(void) access_sched_local_btm(NULL, req->pid, THE_NON_VALUE,
req->trefn, req->rrefn, async,
cancel, 0, info);
erts_free(ERTS_ALC_T_TIMER_REQUEST, vreq);
}
static int
try_access_sched_remote_btm(ErtsSchedulerData *esdp,
Process *c_p, Uint32 sid,
Eterm tref, Uint32 *trefn,
int async, int cancel,
int info, Eterm *resp)
{
ErtsHLTimer *tmr;
Sint64 time_left;
ERTS_HLT_ASSERT(c_p);
/*
* Check if the timer is aimed at current
* process of if this process is an accessor
* of the timer...
*/
erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_BTM);
tmr = proc_btm_rbt_lookup(c_p->bif_timers, trefn);
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
if (!tmr)
tmr = abtm_rbt_lookup(c_p->accessor_bif_timers, trefn);
#endif
erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_BTM);
if (!tmr)
return 0;
if (!cancel) {
erts_aint32_t state = erts_smp_atomic32_read_acqb(&tmr->state);
if (state == ERTS_TMR_STATE_ACTIVE)
time_left = get_time_left(esdp, tmr->timeout);
else
time_left = -1;
}
else {
int cncl_res = cancel_bif_timer(tmr);
if (!cncl_res)
time_left = -1;
else {
time_left = get_time_left(esdp, tmr->timeout);
if (cncl_res > 0)
queue_canceled_timer(esdp, sid, (ErtsTimer *) tmr);
}
}
if (!info) {
*resp = am_ok;
return 1;
}
if (!async) {
if (time_left < 0)
*resp = am_false;
else if (time_left <= (Sint64) MAX_SMALL)
*resp = make_small((Sint) time_left);
else {
Uint hsz = ERTS_SINT64_HEAP_SIZE(time_left);
Eterm *hp = HAlloc(c_p, hsz);
*resp = erts_sint64_to_big(time_left, &hp);
}
}
else {
Eterm tag, res, msg;
Uint hsz;
Eterm *hp;
ErtsProcLocks proc_locks = ERTS_PROC_LOCK_MAIN;
hsz = 4;
if (time_left > (Sint64) MAX_SMALL)
hsz += ERTS_SINT64_HEAP_SIZE(time_left);
hp = HAlloc(c_p, hsz);
if (cancel)
tag = am_cancel_timer;
else
tag = am_read_timer;
if (time_left < 0)
res = am_false;
else if (time_left <= (Sint64) MAX_SMALL)
res = make_small((Sint) time_left);
else
res = erts_sint64_to_big(time_left, &hp);
msg = TUPLE3(hp, tag, tref, res);
erts_queue_message(c_p, &proc_locks, NULL, msg, NIL);
proc_locks &= ~ERTS_PROC_LOCK_MAIN;
if (proc_locks)
erts_smp_proc_unlock(c_p, proc_locks);
*resp = am_ok;
}
return 1;
}
static BIF_RETTYPE
access_bif_timer(Process *c_p, Eterm tref, int cancel, int async, int info)
{
BIF_RETTYPE ret;
ErtsSchedulerData *esdp;
Uint32 sid;
Uint32 *trefn;
Eterm res;
if (is_not_internal_ref(tref)) {
if (is_not_ref(tref))
goto badarg;
else
goto no_timer;
}
esdp = ERTS_PROC_GET_SCHDATA(c_p);
trefn = internal_ref_numbers(tref);
sid = erts_get_ref_numbers_thr_id(trefn);
if (sid < 1 || erts_no_schedulers < sid)
goto no_timer;
if (sid == (Uint32) esdp->no) {
res = access_sched_local_btm(c_p, c_p->common.id,
tref, trefn, NULL,
async, cancel, !async,
info);
ERTS_BIF_PREP_RET(ret, res);
}
else if (try_access_sched_remote_btm(esdp, c_p, sid,
tref, trefn,
async, cancel,
info, &res)) {
ERTS_BIF_PREP_RET(ret, res);
}
else {
/*
* Schedule access for execution on
* remote scheduler...
*/
ErtsBifTimerRequest *req = erts_alloc(ERTS_ALC_T_TIMER_REQUEST,
sizeof(ErtsBifTimerRequest));
req->flags = 0;
if (cancel)
req->flags |= ERTS_BTM_REQ_FLG_CANCEL;
if (async)
req->flags |= ERTS_BTM_REQ_FLG_ASYNC;
if (info)
req->flags |= ERTS_BTM_REQ_FLG_INFO;
req->pid = c_p->common.id;
req->trefn[0] = trefn[0];
req->trefn[1] = trefn[1];
req->trefn[2] = trefn[2];
if (async)
ERTS_BIF_PREP_RET(ret, am_ok);
else {
Eterm *hp, rref;
Uint32 *rrefn;
hp = HAlloc(c_p, REF_THING_SIZE);
rref = erts_sched_make_ref_in_buffer(esdp, hp);
rrefn = internal_ref_numbers(rref);
req->rrefn[0] = rrefn[0];
req->rrefn[1] = rrefn[1];
req->rrefn[2] = rrefn[2];
erts_smp_proc_lock(c_p, ERTS_PROC_LOCKS_MSG_RECEIVE);
if (ERTS_PROC_PENDING_EXIT(c_p))
ERTS_VBUMP_ALL_REDS(c_p);
else {
/*
* Caller needs to wait for a message containing
* the ref that we just created. No such message
* can exist in callers message queue at this time.
* We therefore move the save pointer of the
* callers message queue to the end of the queue.
*
* NOTE: It is of vital importance that the caller
* immediately do a receive unconditionaly
* waiting for the message with the reference;
* otherwise, next receive will *not* work
* as expected!
*/
ERTS_SMP_MSGQ_MV_INQ2PRIVQ(c_p);
c_p->msg.save = c_p->msg.last;
}
erts_smp_proc_unlock(c_p, ERTS_PROC_LOCKS_MSG_RECEIVE);
ERTS_BIF_PREP_TRAP1(ret, erts_await_result, c_p, rref);
}
erts_schedule_misc_aux_work(sid,
bif_timer_access_request,
(void *) req);
}
return ret;
badarg:
ERTS_BIF_PREP_ERROR(ret, c_p, BADARG);
return ret;
no_timer:
ERTS_BIF_PREP_RET(ret, am_false);
return ret;
}
static ERTS_INLINE int
bool_arg(Eterm val, int *argp)
{
switch (val) {
case am_true: *argp = 1; return 1;
case am_false: *argp = 0; return 1;
default: return 0;
}
}
static ERTS_INLINE int
parse_bif_timer_options(Eterm option_list, int *async, int *info,
int *abs, Eterm *accessor)
{
Eterm list = option_list;
if (async)
*async = 0;
if (info)
*info = 1;
if (abs)
*abs = 0;
if (accessor)
*accessor = THE_NON_VALUE;
while (is_list(list)) {
Eterm *consp, *tp, opt;
consp = list_val(list);
opt = CAR(consp);
if (is_not_tuple(opt))
return 0;
tp = tuple_val(opt);
if (arityval(tp[0]) != 2)
return 0;
switch (tp[1]) {
case am_async:
if (!async || !bool_arg(tp[2], async))
return 0;
break;
case am_info:
if (!info || !bool_arg(tp[2], info))
return 0;
break;
case am_abs:
if (!abs || !bool_arg(tp[2], abs))
return 0;
break;
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
case am_accessor:
if (!accessor || is_not_internal_pid(tp[2]))
return 0;
*accessor = tp[2];
break;
#endif
default:
return 0;
}
list = CDR(consp);
}
if (is_not_nil(list))
return 0;
return 1;
}
static void
exit_cancel_bif_timer(ErtsHLTimer *tmr, void *vesdp)
{
ErtsSchedulerData *esdp = (ErtsSchedulerData *) vesdp;
Uint32 sid, roflgs;
erts_aint_t state;
state = erts_smp_atomic32_cmpxchg_acqb(&tmr->state,
ERTS_TMR_STATE_CANCELED,
ERTS_TMR_STATE_ACTIVE);
roflgs = tmr->head.roflgs;
sid = roflgs & ERTS_TMR_ROFLG_SID_MASK;
ERTS_HLT_ASSERT(sid == erts_get_ref_numbers_thr_id(tmr->btm.refn));
ERTS_HLT_ASSERT(tmr->btm.proc_tree.parent
!= ERTS_HLT_PFIELD_NOT_IN_TABLE);
tmr->btm.proc_tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
if (sid == (Uint32) esdp->no) {
if (state == ERTS_TMR_STATE_ACTIVE) {
if (tmr->btm.bp)
free_message_buffer(tmr->btm.bp);
hlt_delete_timer(esdp, tmr);
}
hl_timer_dec_refc(tmr, roflgs);
}
else {
if (state == ERTS_TMR_STATE_ACTIVE) {
if (tmr->btm.bp)
free_message_buffer(tmr->btm.bp);
queue_canceled_timer(esdp, sid, (ErtsTimer *) tmr);
}
else
hl_timer_dec_refc(tmr, roflgs);
}
}
#ifdef ERTS_HLT_DEBUG
# define ERTS_BTM_MAX_DESTROY_LIMIT 2
#else
# define ERTS_BTM_MAX_DESTROY_LIMIT 50
#endif
typedef struct {
ErtsBifTimers *bif_timers;
union {
proc_btm_rbt_yield_state_t proc_btm_yield_state;
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
abtm_rbt_yield_state_t abtm_yield_state;
#endif
} u;
} ErtsBifTimerYieldState;
int erts_cancel_bif_timers(Process *p, ErtsBifTimers *btm, void **vyspp)
{
ErtsSchedulerData *esdp = ERTS_PROC_GET_SCHDATA(p);
ErtsBifTimerYieldState ys = {btm, {ERTS_RBT_YIELD_STAT_INITER}};
ErtsBifTimerYieldState *ysp;
int res;
ysp = (ErtsBifTimerYieldState *) *vyspp;
if (!ysp)
ysp = &ys;
res = proc_btm_rbt_foreach_destroy_yielding(&ysp->bif_timers,
exit_cancel_bif_timer,
(void *) esdp,
&ysp->u.proc_btm_yield_state,
ERTS_BTM_MAX_DESTROY_LIMIT);
if (res == 0) {
if (ysp != &ys)
erts_free(ERTS_ALC_T_BTM_YIELD_STATE, ysp);
*vyspp = NULL;
}
else {
if (ysp == &ys) {
ysp = erts_alloc(ERTS_ALC_T_BTM_YIELD_STATE,
sizeof(ErtsBifTimerYieldState));
sys_memcpy((void *) ysp, (void *) &ys,
sizeof(ErtsBifTimerYieldState));
}
*vyspp = (void *) ysp;
}
return res;
}
#ifdef ERTS_BTM_ACCESSOR_SUPPORT
static void
detach_bif_timer(ErtsHLTimer *tmr, void *vesdp)
{
tmr->abtm.tree.parent = ERTS_HLT_PFIELD_NOT_IN_TABLE;
hl_timer_dec_refc(tmr, tmr->head.roflgs);
}
int erts_detach_accessor_bif_timers(Process *p, ErtsBifTimers *btm, void **vyspp)
{
ErtsSchedulerData *esdp = ERTS_PROC_GET_SCHDATA(p);
ErtsBifTimerYieldState ys = {btm, {ERTS_RBT_YIELD_STAT_INITER}};
ErtsBifTimerYieldState *ysp;
int res;
ysp = (ErtsBifTimerYieldState *) *vyspp;
if (!ysp)
ysp = &ys;
res = abtm_rbt_foreach_destroy_yielding(&ysp->bif_timers,
detach_bif_timer,
(void *) esdp,
&ysp->u.abtm_yield_state,
ERTS_BTM_MAX_DESTROY_LIMIT);
if (res == 0) {
if (ysp != &ys)
erts_free(ERTS_ALC_T_BTM_YIELD_STATE, ysp);
*vyspp = NULL;
}
else {
if (ysp == &ys) {
ysp = erts_alloc(ERTS_ALC_T_BTM_YIELD_STATE,
sizeof(ErtsBifTimerYieldState));
sys_memcpy((void *) ysp, (void *) &ys,
sizeof(ErtsBifTimerYieldState));
}
*vyspp = (void *) ysp;
}
return res;
}
#endif /* ERTS_BTM_ACCESSOR_SUPPORT */
static ERTS_INLINE int
parse_timeout_pos(ErtsSchedulerData *esdp, Eterm arg,
ErtsMonotonicTime *conv_arg, int abs,
ErtsMonotonicTime *tposp, int *stimep)
{
ErtsMonotonicTime t;
if (!term_to_Sint64(arg, &t)) {
ERTS_HLT_ASSERT(!is_small(arg));
if (!is_big(arg))
return -1;
if (abs || !big_sign(arg))
return 1;
return -1;
}
if (conv_arg)
*conv_arg = t;
if (abs) {
t += -1*ERTS_MONOTONIC_OFFSET_MSEC; /* external to internal */
if (t < ERTS_MONOTONIC_TO_MSEC(ERTS_MONOTONIC_BEGIN))
return 1;
if (t > ERTS_MONOTONIC_TO_MSEC(ERTS_MONOTONIC_END))
return 1;
*stimep = (t - ERTS_MONOTONIC_TO_MSEC(esdp->last_monotonic_time)
< ERTS_BIF_TIMER_SHORT_TIME);
*tposp = ERTS_MSEC_TO_CLKTCKS(t);
}
else {
ErtsMonotonicTime now, ticks;
if (t < 0)
return -1;
ticks = ERTS_MSEC_TO_CLKTCKS(t);
if (ERTS_CLKTCK_RESOLUTION > 1000 && ticks < 0)
return 1;
ERTS_HLT_ASSERT(ticks >= 0);
now = erts_get_monotonic_time(esdp);
ticks += ERTS_MONOTONIC_TO_CLKTCKS(now-1);
ticks += 1;
if (ticks < ERTS_MONOTONIC_TO_CLKTCKS(ERTS_MONOTONIC_BEGIN))
return 1;
if (ticks > ERTS_MONOTONIC_TO_CLKTCKS(ERTS_MONOTONIC_END))
return 1;
*stimep = (t < ERTS_BIF_TIMER_SHORT_TIME);
*tposp = ticks;
}
return 0;
}
/*
*
* The BIF timer BIFs...
*/
BIF_RETTYPE send_after_3(BIF_ALIST_3)
{
ErtsMonotonicTime timeout_pos;
int short_time, tres;
tres = parse_timeout_pos(ERTS_PROC_GET_SCHDATA(BIF_P), BIF_ARG_1, NULL,
0, &timeout_pos, &short_time);
if (tres != 0)
BIF_ERROR(BIF_P, BADARG);
return setup_bif_timer(BIF_P, timeout_pos, short_time,
BIF_ARG_2, BIF_ARG_2, BIF_ARG_3, 0);
}
BIF_RETTYPE send_after_4(BIF_ALIST_4)
{
ErtsMonotonicTime timeout_pos;
Eterm accessor;
int short_time, abs, tres;
if (!parse_bif_timer_options(BIF_ARG_4, NULL, NULL, &abs, &accessor))
BIF_ERROR(BIF_P, BADARG);
tres = parse_timeout_pos(ERTS_PROC_GET_SCHDATA(BIF_P), BIF_ARG_1, NULL,
abs, &timeout_pos, &short_time);
if (tres != 0)
BIF_ERROR(BIF_P, BADARG);
return setup_bif_timer(BIF_P, timeout_pos, short_time,
BIF_ARG_2, accessor, BIF_ARG_3, 0);
}
BIF_RETTYPE start_timer_3(BIF_ALIST_3)
{
ErtsMonotonicTime timeout_pos;
int short_time, tres;
tres = parse_timeout_pos(ERTS_PROC_GET_SCHDATA(BIF_P), BIF_ARG_1, NULL,
0, &timeout_pos, &short_time);
if (tres != 0)
BIF_ERROR(BIF_P, BADARG);
return setup_bif_timer(BIF_P, timeout_pos, short_time,
BIF_ARG_2, BIF_ARG_2, BIF_ARG_3, !0);
}
BIF_RETTYPE start_timer_4(BIF_ALIST_4)
{
ErtsMonotonicTime timeout_pos;
Eterm accessor;
int short_time, abs, tres;
if (!parse_bif_timer_options(BIF_ARG_4, NULL, NULL, &abs, &accessor))
BIF_ERROR(BIF_P, BADARG);
tres = parse_timeout_pos(ERTS_PROC_GET_SCHDATA(BIF_P), BIF_ARG_1, NULL,
abs, &timeout_pos, &short_time);
if (tres != 0)
BIF_ERROR(BIF_P, BADARG);
return setup_bif_timer(BIF_P, timeout_pos, short_time,
BIF_ARG_2, accessor, BIF_ARG_3, !0);
}
BIF_RETTYPE cancel_timer_1(BIF_ALIST_1)
{
return access_bif_timer(BIF_P, BIF_ARG_1, 1, 0, 1);
}
BIF_RETTYPE cancel_timer_2(BIF_ALIST_2)
{
BIF_RETTYPE ret;
int async, info;
if (parse_bif_timer_options(BIF_ARG_2, &async, &info, NULL, NULL))
return access_bif_timer(BIF_P, BIF_ARG_1, 1, async, info);
ERTS_BIF_PREP_ERROR(ret, BIF_P, BADARG);
return ret;
}
BIF_RETTYPE read_timer_1(BIF_ALIST_1)
{
return access_bif_timer(BIF_P, BIF_ARG_1, 0, 0, 1);
}
BIF_RETTYPE read_timer_2(BIF_ALIST_2)
{
BIF_RETTYPE ret;
int async;
if (parse_bif_timer_options(BIF_ARG_2, &async, NULL, NULL, NULL))
return access_bif_timer(BIF_P, BIF_ARG_1, 0, async, 1);
ERTS_BIF_PREP_ERROR(ret, BIF_P, BADARG);
return ret;
}
static void
start_callback_timer(ErtsSchedulerData *esdp,
int twt,
ErtsMonotonicTime timeout_pos,
void (*callback)(void *),
void *arg)
{
if (twt)
create_tw_timer(esdp, ERTS_TMR_CALLBACK, NULL,
callback, arg, timeout_pos);
else
create_hl_timer(esdp, timeout_pos, 0,
ERTS_TMR_CALLBACK, NULL,
NIL, THE_NON_VALUE, NIL,
NULL, callback, arg);
}
typedef struct {
int twt;
ErtsMonotonicTime timeout_pos;
void (*callback)(void *);
void *arg;
} ErtsStartCallbackTimerRequest;
static void
scheduled_start_callback_timer(void *vsctr)
{
ErtsStartCallbackTimerRequest *sctr
= (ErtsStartCallbackTimerRequest *) vsctr;
start_callback_timer(erts_get_scheduler_data(),
sctr->twt,
sctr->timeout_pos,
sctr->callback,
sctr->arg);
erts_free(ERTS_ALC_T_TIMER_REQUEST, vsctr);
}
void
erts_start_timer_callback(ErtsMonotonicTime tmo,
void (*callback)(void *),
void *arg)
{
ErtsSchedulerData *esdp;
ErtsMonotonicTime timeout_pos;
int twt;
esdp = erts_get_scheduler_data();
timeout_pos = get_timeout_pos(erts_get_monotonic_time(esdp),
tmo);
twt = tmo < ERTS_TIMER_WHEEL_MSEC;
if (esdp)
start_callback_timer(esdp,
twt,
timeout_pos,
callback,
arg);
else {
ErtsStartCallbackTimerRequest *sctr;
sctr = erts_alloc(ERTS_ALC_T_TIMER_REQUEST,
sizeof(ErtsStartCallbackTimerRequest));
sctr->twt = twt;
sctr->timeout_pos = timeout_pos;
sctr->callback = callback;
sctr->arg = arg;
erts_schedule_misc_aux_work(1,
scheduled_start_callback_timer,
(void *) sctr);
}
}
/*
* Process and Port timer functionality.
*
* NOTE! These are only allowed to be called by a
* scheduler thread that currently is
* executing the process or port.
*/
static ERTS_INLINE void
set_proc_timer_common(Process *c_p, ErtsSchedulerData *esdp, Sint64 tmo,
ErtsMonotonicTime timeout_pos, int short_time)
{
void *tmr;
check_canceled_queue(esdp, esdp->timer_service);
if (tmo == 0)
c_p->flags |= F_TIMO;
else {
c_p->flags |= F_INSLPQUEUE;
c_p->flags &= ~F_TIMO;
if (tmo < ERTS_TIMER_WHEEL_MSEC)
tmr = (void *) create_tw_timer(esdp, ERTS_TMR_PROC, (void *) c_p,
NULL, NULL, timeout_pos);
else
tmr = (void *) create_hl_timer(esdp, timeout_pos, short_time,
ERTS_TMR_PROC, (void *) c_p,
c_p->common.id, THE_NON_VALUE,
NIL, NULL, NULL, NULL);
erts_smp_atomic_set_relb(&c_p->common.timer, (erts_aint_t) tmr);
}
}
int
erts_set_proc_timer_term(Process *c_p, Eterm etmo)
{
ErtsSchedulerData *esdp = ERTS_PROC_GET_SCHDATA(c_p);
ErtsMonotonicTime tmo, timeout_pos;
int short_time, tres;
ERTS_HLT_ASSERT(erts_smp_atomic_read_nob(&c_p->common.timer)
== ERTS_PTMR_NONE);
tres = parse_timeout_pos(esdp, etmo, &tmo, 0,
&timeout_pos, &short_time);
if (tres != 0)
return tres;
if ((tmo >> 32) != 0)
return 1;
set_proc_timer_common(c_p, esdp, tmo, timeout_pos, short_time);
return 0;
}
void
erts_set_proc_timer_uword(Process *c_p, UWord tmo)
{
ErtsSchedulerData *esdp = ERTS_PROC_GET_SCHDATA(c_p);
ERTS_HLT_ASSERT(erts_smp_atomic_read_nob(&c_p->common.timer)
== ERTS_PTMR_NONE);
#ifndef ARCH_32
ERTS_HLT_ASSERT((tmo >> 32) == (UWord) 0);
#endif
if (tmo == 0)
c_p->flags |= F_TIMO;
else {
ErtsMonotonicTime timeout_pos;
timeout_pos = get_timeout_pos(erts_get_monotonic_time(esdp),
(ErtsMonotonicTime) tmo);
set_proc_timer_common(c_p, esdp, (ErtsMonotonicTime) tmo,
timeout_pos,
tmo < ERTS_BIF_TIMER_SHORT_TIME);
}
}
void
erts_cancel_proc_timer(Process *c_p)
{
erts_aint_t tval;
tval = erts_smp_atomic_xchg_acqb(&c_p->common.timer,
ERTS_PTMR_NONE);
c_p->flags &= ~(F_INSLPQUEUE|F_TIMO);
if (tval == ERTS_PTMR_NONE)
return;
if (tval == ERTS_PTMR_TIMEDOUT) {
erts_smp_atomic_set_nob(&c_p->common.timer, ERTS_PTMR_NONE);
return;
}
continue_cancel_ptimer(ERTS_PROC_GET_SCHDATA(c_p),
(ErtsTimer *) tval);
}
void
erts_set_port_timer(Port *c_prt, Sint64 tmo)
{
void *tmr;
ErtsSchedulerData *esdp = erts_get_scheduler_data();
ErtsMonotonicTime timeout_pos;
if (erts_smp_atomic_read_nob(&c_prt->common.timer) != ERTS_PTMR_NONE)
erts_cancel_port_timer(c_prt);
check_canceled_queue(esdp, esdp->timer_service);
timeout_pos = get_timeout_pos(erts_get_monotonic_time(esdp), tmo);
if (tmo < ERTS_TIMER_WHEEL_MSEC)
tmr = (void *) create_tw_timer(esdp, ERTS_TMR_PORT, (void *) c_prt,
NULL, NULL, timeout_pos);
else
tmr = (void *) create_hl_timer(esdp, timeout_pos, 0, ERTS_TMR_PORT,
(void *) c_prt, c_prt->common.id,
THE_NON_VALUE, NIL, NULL, NULL, NULL);
erts_smp_atomic_set_relb(&c_prt->common.timer, (erts_aint_t) tmr);
}
void
erts_cancel_port_timer(Port *c_prt)
{
erts_aint_t tval;
tval = erts_smp_atomic_xchg_acqb(&c_prt->common.timer,
ERTS_PTMR_NONE);
if (tval == ERTS_PTMR_NONE)
return;
if (tval == ERTS_PTMR_TIMEDOUT) {
while (!erts_port_task_is_scheduled(&c_prt->timeout_task))
erts_thr_yield();
erts_port_task_abort(&c_prt->timeout_task);
erts_smp_atomic_set_nob(&c_prt->common.timer, ERTS_PTMR_NONE);
return;
}
continue_cancel_ptimer(erts_get_scheduler_data(),
(ErtsTimer *) tval);
}
Sint64
erts_read_port_timer(Port *c_prt)
{
ErtsTimer *tmr;
erts_aint_t itmr;
ErtsMonotonicTime timeout_pos;
itmr = erts_smp_atomic_read_acqb(&c_prt->common.timer);
if (itmr == ERTS_PTMR_NONE)
return (Sint64) -1;
if (itmr == ERTS_PTMR_TIMEDOUT)
return (Sint64) 0;
tmr = (ErtsTimer *) itmr;
if (tmr->head.roflgs & ERTS_TMR_ROFLG_HLT)
timeout_pos = tmr->hlt.timeout;
else
timeout_pos = tmr->twt.tw_tmr.timeout_pos;
return get_time_left(NULL, timeout_pos);
}
/*
* Debug stuff...
*/
typedef struct {
int to;
void *to_arg;
ErtsMonotonicTime now;
} ErtsBTMPrint;
static void
btm_print(ErtsHLTimer *tmr, void *vbtmp)
{
ErtsBTMPrint *btmp = (ErtsBTMPrint *) vbtmp;
ErtsMonotonicTime left;
Eterm receiver;
if (tmr->timeout <= btmp->now)
left = 0;
left = ERTS_CLKTCKS_TO_MSEC(tmr->timeout - btmp->now);
receiver = ((tmr->head.roflgs & ERTS_TMR_ROFLG_REG_NAME)
? tmr->receiver.name
: tmr->receiver.proc->common.id);
erts_print(btmp->to, btmp->to_arg,
"=timer:%T\n"
"Message: %T\n"
"Time left: %b64d\n",
receiver,
tmr->btm.message,
(Sint64) left);
}
void
erts_print_bif_timer_info(int to, void *to_arg)
{
ErtsBTMPrint btmp;
int six;
if (!ERTS_IS_CRASH_DUMPING)
ERTS_INTERNAL_ERROR("Not crash dumping");
btmp.to = to;
btmp.to_arg = to_arg;
btmp.now = erts_get_monotonic_time(NULL);
btmp.now = ERTS_MONOTONIC_TO_CLKTCKS(btmp.now);
for (six = 0; six < erts_no_schedulers; six++) {
ErtsHLTimerService *srv =
erts_aligned_scheduler_data[six].esd.timer_service;
btm_rbt_foreach(srv->btm_tree, btm_print, (void *) &btmp);
}
}
typedef struct {
void (*func)(Eterm,
Eterm,
ErlHeapFragment *,
void *);
void *arg;
} ErtsBTMForeachDebug;
static void
debug_btm_foreach(ErtsHLTimer *tmr, void *vbtmfd)
{
if (erts_smp_atomic32_read_nob(&tmr->state) == ERTS_TMR_STATE_ACTIVE) {
ErtsBTMForeachDebug *btmfd = (ErtsBTMForeachDebug *) vbtmfd;
(*btmfd->func)(((tmr->head.roflgs & ERTS_TMR_ROFLG_REG_NAME)
? tmr->receiver.name
: tmr->receiver.proc->common.id),
tmr->btm.message,
tmr->btm.bp,
btmfd->arg);
}
}
void
erts_debug_bif_timer_foreach(void (*func)(Eterm,
Eterm,
ErlHeapFragment *,
void *),
void *arg)
{
ErtsBTMForeachDebug btmfd;
int six;
btmfd.func = func;
btmfd.arg = arg;
if (!erts_smp_thr_progress_is_blocking())
ERTS_INTERNAL_ERROR("Not blocking thread progress");
for (six = 0; six < erts_no_schedulers; six++) {
ErtsHLTimerService *srv =
erts_aligned_scheduler_data[six].esd.timer_service;
btm_rbt_foreach(srv->btm_tree,
debug_btm_foreach,
(void *) &btmfd);
}
}
typedef struct {
void (*tclbk)(void *);
void (*func)(void *,
ErtsMonotonicTime,
void *);
void *arg;
} ErtsDebugForeachCallbackTimer;
static void
debug_callback_timer_foreach_list(ErtsHLTimer *tmr, void *vdfct)
{
ErtsDebugForeachCallbackTimer *dfct
= (ErtsDebugForeachCallbackTimer *) vdfct;
if ((tmr->head.roflgs & ERTS_TMR_ROFLG_CALLBACK)
&& (tmr->receiver.callback == dfct->tclbk))
(*dfct->func)(dfct->arg,
tmr->timeout,
tmr->head.u.arg);
}
static void
debug_callback_timer_foreach(ErtsHLTimer *tmr, void *vdfct)
{
ErtsDebugForeachCallbackTimer *dfct
= (ErtsDebugForeachCallbackTimer *) vdfct;
if (tmr->time.tree.same_time)
same_time_list_foreach(tmr->time.tree.same_time,
debug_callback_timer_foreach_list,
vdfct);
if ((tmr->head.roflgs & ERTS_TMR_ROFLG_CALLBACK)
&& (tmr->receiver.callback == dfct->tclbk))
(*dfct->func)(dfct->arg,
tmr->timeout,
tmr->head.u.arg);
}
static void
debug_tw_callback_timer(void *vdfct,
ErtsMonotonicTime timeout_pos,
void *vtwtp)
{
ErtsTWTimer *twtp = (ErtsTWTimer *) vtwtp;
ErtsDebugForeachCallbackTimer *dfct
= (ErtsDebugForeachCallbackTimer *) vdfct;
if (twtp->u.callback == dfct->tclbk)
(*dfct->func)(dfct->arg,
timeout_pos,
twtp->head.u.arg);
}
void
erts_debug_callback_timer_foreach(void (*tclbk)(void *),
void (*func)(void *,
ErtsMonotonicTime,
void *),
void *arg)
{
int six;
ErtsDebugForeachCallbackTimer dfct;
dfct.tclbk = tclbk;
dfct.func = func;
dfct.arg = arg;
if (!erts_smp_thr_progress_is_blocking())
ERTS_INTERNAL_ERROR("Not blocking thread progress");
for (six = 0; six < erts_no_schedulers; six++) {
ErtsHLTimerService *srv =
erts_aligned_scheduler_data[six].esd.timer_service;
ErtsTimerWheel *twheel =
erts_aligned_scheduler_data[six].esd.timer_wheel;
erts_twheel_debug_foreach(twheel,
tw_callback_timeout,
debug_tw_callback_timer,
(void *) &dfct);
if (srv->yield.root)
debug_callback_timer_foreach(srv->yield.root,
(void *) &dfct);
time_rbt_foreach(srv->time_tree,
debug_callback_timer_foreach,
(void *) &dfct);
}
}
#ifdef ERTS_HLT_HARD_DEBUG
typedef struct {
ErtsHLTimerService *srv;
int found_root;
ErtsHLTimer **rootpp;
} ErtsHdbgHLT;
static void
st_hdbg_func(ErtsHLTimer *tmr, void *vhdbg)
{
ErtsHdbgHLT *hdbg = (ErtsHdbgHLT *) vhdbg;
ErtsHLTimer **rootpp;
ERTS_HLT_ASSERT(tmr->time.tree.parent & ERTS_HLT_PFLG_SAME_TIME);
if (tmr->time.tree.parent == ERTS_HLT_PFLG_SAME_TIME) {
ERTS_HLT_ASSERT(tmr != *hdbg->rootpp);
}
else {
rootpp = (ErtsHLTimer **) (tmr->time.tree.parent
& ~ERTS_HLT_PFLG_SAME_TIME);
ERTS_HLT_ASSERT(rootpp == hdbg->rootpp);
ERTS_HLT_ASSERT(tmr == *rootpp);
ERTS_HLT_ASSERT(!hdbg->found_root);
hdbg->found_root = 1;
}
ERTS_HLT_ASSERT(tmr->time.tree.u.l.next->time.tree.u.l.prev == tmr);
ERTS_HLT_ASSERT(tmr->time.tree.u.l.prev->time.tree.u.l.next == tmr);
ERTS_HLT_ASSERT(btm_rbt_lookup(hdbg->srv->btm_tree, tmr->btm.refn) == tmr);
}
static void
tt_hdbg_func(ErtsHLTimer *tmr, void *vhdbg)
{
ErtsHdbgHLT *hdbg = (ErtsHdbgHLT *) vhdbg;
ErtsHLTimer *prnt;
ERTS_HLT_ASSERT((tmr->time.tree.parent & ERTS_HLT_PFLG_SAME_TIME) == 0);
prnt = (ErtsHLTimer *) (tmr->time.tree.parent & ~ERTS_HLT_PFLGS_MASK);
if (prnt) {
ERTS_HLT_ASSERT(prnt->time.tree.u.t.left == tmr
|| prnt->time.tree.u.t.right == tmr);
}
else {
ERTS_HLT_ASSERT(!hdbg->found_root);
hdbg->found_root = 1;
ERTS_HLT_ASSERT(tmr == *hdbg->rootpp);
}
if (tmr->time.tree.u.t.left) {
prnt = (ErtsHLTimer *) (tmr->time.tree.u.t.left->time.tree.parent
& ~ERTS_HLT_PFLGS_MASK);
ERTS_HLT_ASSERT(tmr == prnt);
}
if (tmr->time.tree.u.t.right) {
prnt = (ErtsHLTimer *) (tmr->time.tree.u.t.right->time.tree.parent
& ~ERTS_HLT_PFLGS_MASK);
ERTS_HLT_ASSERT(tmr == prnt);
}
if (tmr->head.roflgs & ERTS_TMR_ROFLG_BIF_TMR)
ERTS_HLT_ASSERT(btm_rbt_lookup(hdbg->srv->btm_tree, tmr->btm.refn) == tmr);
if (tmr->time.tree.same_time) {
ErtsHdbgHLT st_hdbg;
st_hdbg.srv = hdbg->srv;
st_hdbg.found_root = 0;
st_hdbg.rootpp = &tmr->time.tree.same_time;
same_time_list_foreach(tmr->time.tree.same_time, st_hdbg_func, (void *) &st_hdbg);
ERTS_HLT_ASSERT(st_hdbg.found_root);
}
}
static void
bt_hdbg_func(ErtsHLTimer *tmr, void *vhdbg)
{
ErtsHdbgHLT *hdbg = (ErtsHdbgHLT *) vhdbg;
ErtsHLTimer *prnt;
ERTS_HLT_ASSERT((tmr->btm.tree.parent & ERTS_HLT_PFLG_SAME_TIME) == 0);
prnt = (ErtsHLTimer *) (tmr->btm.tree.parent & ~ERTS_HLT_PFLGS_MASK);
if (prnt) {
ERTS_HLT_ASSERT(prnt->btm.tree.left == tmr
|| prnt->btm.tree.right == tmr);
}
else {
ERTS_HLT_ASSERT(!hdbg->found_root);
hdbg->found_root = 1;
ERTS_HLT_ASSERT(tmr == *hdbg->rootpp);
}
if (tmr->btm.tree.left) {
prnt = (ErtsHLTimer *) (tmr->btm.tree.left->btm.tree.parent
& ~ERTS_HLT_PFLGS_MASK);
ERTS_HLT_ASSERT(tmr == prnt);
}
if (tmr->btm.tree.right) {
prnt = (ErtsHLTimer *) (tmr->btm.tree.right->btm.tree.parent
& ~ERTS_HLT_PFLGS_MASK);
ERTS_HLT_ASSERT(tmr == prnt);
}
if (tmr->pending_timeout) {
if (tmr->pending_timeout > 0) /* container > 0 */
ERTS_HLT_ASSERT(tmr->time.tree.parent == ERTS_HLT_PFIELD_NOT_IN_TABLE);
else {
ERTS_HLT_ASSERT(tmr->time.tree.parent != ERTS_HLT_PFIELD_NOT_IN_TABLE);
ERTS_HLT_ASSERT(tmr->time.tree.parent & ERTS_HLT_PFLG_SAME_TIME);
}
}
else {
ErtsHLTimer *ttmr = time_rbt_lookup(hdbg->srv->time_tree, tmr->timeout);
ERTS_HLT_ASSERT(ttmr);
if (ttmr != tmr) {
ERTS_HLT_ASSERT(ttmr->time.tree.same_time);
ERTS_HLT_ASSERT(tmr == same_time_list_lookup(ttmr->time.tree.same_time, tmr));
}
}
}
static void
hdbg_chk_srv(ErtsHLTimerService *srv)
{
if (srv->time_tree) {
ErtsHdbgHLT hdbg;
hdbg.srv = srv;
hdbg.found_root = 0;
hdbg.rootpp = &srv->time_tree;
time_rbt_foreach(srv->time_tree, tt_hdbg_func, (void *) &hdbg);
ERTS_HLT_ASSERT(hdbg.found_root);
}
if (srv->btm_tree) {
ErtsHdbgHLT hdbg;
hdbg.srv = srv;
hdbg.found_root = 0;
hdbg.rootpp = &srv->btm_tree;
btm_rbt_foreach(srv->btm_tree, bt_hdbg_func, (void *) &hdbg);
ERTS_HLT_ASSERT(hdbg.found_root);
}
}
#endif /* ERTS_HLT_HARD_DEBUG */
