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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2006-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#ifndef ERL_TIME_H__
#define ERL_TIME_H__
#define ERTS_SHORT_TIME_T_MAX ERTS_AINT32_T_MAX
#define ERTS_SHORT_TIME_T_MIN ERTS_AINT32_T_MIN
typedef erts_aint32_t erts_short_time_t;
extern erts_smp_atomic32_t do_time; /* set at clock interrupt */
extern SysTimeval erts_first_emu_time;
/*
** Timer entry:
*/
typedef struct erl_timer {
struct erl_timer* next; /* next entry tiw slot or chain */
struct erl_timer* prev; /* prev entry tiw slot or chain */
Uint slot; /* slot in timer wheel */
Uint count; /* number of loops remaining */
int active; /* 1=activated, 0=deactivated */
/* called when timeout */
void (*timeout)(void*);
/* called when cancel (may be NULL) */
void (*cancel)(void*);
void* arg; /* argument to timeout/cancel procs */
} ErlTimer;
typedef void (*ErlTimeoutProc)(void*);
typedef void (*ErlCancelProc)(void*);
#ifdef ERTS_SMP
/*
* Process and port timer
*/
typedef union ErtsSmpPTimer_ ErtsSmpPTimer;
union ErtsSmpPTimer_ {
struct {
ErlTimer tm;
Eterm id;
void (*timeout_func)(void*);
ErtsSmpPTimer **timer_ref;
Uint32 flags;
} timer;
ErtsSmpPTimer *next;
};
void erts_create_smp_ptimer(ErtsSmpPTimer **timer_ref,
Eterm id,
ErlTimeoutProc timeout_func,
Uint timeout);
void erts_cancel_smp_ptimer(ErtsSmpPTimer *ptimer);
#endif
/* timer-wheel api */
void erts_init_time(void);
void erts_set_timer(ErlTimer*, ErlTimeoutProc, ErlCancelProc, void*, Uint);
void erts_cancel_timer(ErlTimer*);
void erts_bump_timer(erts_short_time_t);
Uint erts_timer_wheel_memory_size(void);
Uint erts_time_left(ErlTimer *);
erts_short_time_t erts_next_time(void);
#ifdef DEBUG
void erts_p_slpq(void);
#endif
ERTS_GLB_INLINE erts_short_time_t erts_do_time_read_and_reset(void);
ERTS_GLB_INLINE void erts_do_time_add(erts_short_time_t);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE erts_short_time_t erts_do_time_read_and_reset(void)
{
erts_short_time_t time = erts_smp_atomic32_xchg_acqb(&do_time, 0);
if (time < 0)
erl_exit(ERTS_ABORT_EXIT, "Internal time management error\n");
return time;
}
ERTS_GLB_INLINE void erts_do_time_add(erts_short_time_t elapsed)
{
erts_smp_atomic32_add_relb(&do_time, elapsed);
}
#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */
/* time_sup */
#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME_CPU_TIME))
# ifndef HAVE_ERTS_NOW_CPU
# define HAVE_ERTS_NOW_CPU
# ifdef HAVE_GETHRVTIME
# define erts_start_now_cpu() sys_start_hrvtime()
# define erts_stop_now_cpu() sys_stop_hrvtime()
# endif
# endif
void erts_get_now_cpu(Uint* megasec, Uint* sec, Uint* microsec);
#endif
typedef UWord erts_approx_time_t;
erts_approx_time_t erts_get_approx_time(void);
void erts_get_timeval(SysTimeval *tv);
erts_time_t erts_get_time(void);
ERTS_GLB_INLINE int erts_cmp_timeval(SysTimeval *t1p, SysTimeval *t2p);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE int
erts_cmp_timeval(SysTimeval *t1p, SysTimeval *t2p)
{
if (t1p->tv_sec == t2p->tv_sec) {
if (t1p->tv_usec < t2p->tv_usec)
return -1;
else if (t1p->tv_usec > t2p->tv_usec)
return 1;
return 0;
}
return t1p->tv_sec < t2p->tv_sec ? -1 : 1;
}
#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */
#endif /* ERL_TIME_H__ */
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