aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/beam/erl_port.h
diff options
context:
space:
mode:
Diffstat (limited to 'erts/emulator/beam/erl_port.h')
-rw-r--r--erts/emulator/beam/erl_port.h212
1 files changed, 160 insertions, 52 deletions
diff --git a/erts/emulator/beam/erl_port.h b/erts/emulator/beam/erl_port.h
index ad3f104a68..f90844ccc8 100644
--- a/erts/emulator/beam/erl_port.h
+++ b/erts/emulator/beam/erl_port.h
@@ -1,18 +1,19 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2012-2013. All Rights Reserved.
+ * Copyright Ericsson AB 2012-2016. 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/.
+ * 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
*
- * 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.
+ * 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%
*/
@@ -184,8 +185,13 @@ struct _erl_drv_port {
int control_flags; /* Flags for port_control() */
ErlDrvPDL port_data_lock;
- ErtsPrtSD *psd; /* Port specific data */
+ erts_smp_atomic_t psd; /* Port specific data */
int reds; /* Only used while executing driver callbacks */
+
+ struct {
+ Eterm to;
+ Uint32 ref[ERTS_MAX_REF_NUMBERS];
+ } *async_open_port; /* Reference used with async open port */
};
@@ -246,28 +252,56 @@ ERTS_GLB_INLINE void *erts_prtsd_set(Port *p, int ix, void *new);
ERTS_GLB_INLINE void *
erts_prtsd_get(Port *prt, int ix)
{
- return prt->psd ? prt->psd->data[ix] : NULL;
+ ErtsPrtSD *psd = (ErtsPrtSD *) erts_smp_atomic_read_nob(&prt->psd);
+ if (!psd)
+ return NULL;
+ ERTS_SMP_DATA_DEPENDENCY_READ_MEMORY_BARRIER;
+ return psd->data[ix];
}
ERTS_GLB_INLINE void *
erts_prtsd_set(Port *prt, int ix, void *data)
{
- if (prt->psd) {
- void *old = prt->psd->data[ix];
- prt->psd->data[ix] = data;
+ ErtsPrtSD *psd, *new_psd;
+ void *old;
+ int i;
+
+ psd = (ErtsPrtSD *) erts_smp_atomic_read_nob(&prt->psd);
+
+ if (psd) {
+#ifdef ERTS_SMP
+#ifdef ETHR_ORDERED_READ_DEPEND
+ ETHR_MEMBAR(ETHR_LoadStore|ETHR_StoreStore);
+#else
+ ETHR_MEMBAR(ETHR_LoadLoad|ETHR_LoadStore|ETHR_StoreStore);
+#endif
+#endif
+ old = psd->data[ix];
+ psd->data[ix] = data;
return old;
}
- else {
- prt->psd = erts_alloc(ERTS_ALC_T_PRTSD, sizeof(ErtsPrtSD));
- prt->psd->data[ix] = data;
+
+ if (!data)
return NULL;
- }
+
+ new_psd = erts_alloc(ERTS_ALC_T_PRTSD, sizeof(ErtsPrtSD));
+ for (i = 0; i < ERTS_PRTSD_SIZE; i++)
+ new_psd->data[i] = NULL;
+ psd = (ErtsPrtSD *) erts_smp_atomic_cmpxchg_mb(&prt->psd,
+ (erts_aint_t) new_psd,
+ (erts_aint_t) NULL);
+ if (psd)
+ erts_free(ERTS_ALC_T_PRTSD, new_psd);
+ else
+ psd = new_psd;
+ old = psd->data[ix];
+ psd->data[ix] = data;
+ return old;
}
#endif
-extern erts_smp_atomic_t erts_bytes_out; /* no bytes written out */
-extern erts_smp_atomic_t erts_bytes_in; /* no bytes sent into the system */
+Eterm erts_request_io_bytes(Process *c_p);
/* port status flags */
@@ -327,6 +361,8 @@ extern erts_smp_atomic_t erts_bytes_in; /* no bytes sent into the system */
#define ERTS_PORT_REDS_CONNECT (CONTEXT_REDS/200)
#define ERTS_PORT_REDS_UNLINK (CONTEXT_REDS/200)
#define ERTS_PORT_REDS_LINK (CONTEXT_REDS/200)
+#define ERTS_PORT_REDS_MONITOR (CONTEXT_REDS/200)
+#define ERTS_PORT_REDS_DEMONITOR (CONTEXT_REDS/200)
#define ERTS_PORT_REDS_BADSIG (CONTEXT_REDS/200)
#define ERTS_PORT_REDS_CONTROL (CONTEXT_REDS/100)
#define ERTS_PORT_REDS_CALL (CONTEXT_REDS/50)
@@ -350,6 +386,7 @@ int erts_lc_is_port_locked(Port *);
ERTS_GLB_INLINE void erts_port_inc_refc(Port *prt);
ERTS_GLB_INLINE void erts_port_dec_refc(Port *prt);
ERTS_GLB_INLINE void erts_port_add_refc(Port *prt, Sint32 add_refc);
+ERTS_GLB_INLINE Sint erts_port_read_refc(Port *prt);
ERTS_GLB_INLINE int erts_smp_port_trylock(Port *prt);
ERTS_GLB_INLINE void erts_smp_port_lock(Port *prt);
@@ -359,37 +396,26 @@ ERTS_GLB_INLINE void erts_smp_port_unlock(Port *prt);
ERTS_GLB_INLINE void erts_port_inc_refc(Port *prt)
{
-#ifdef ERTS_SMP
- erts_ptab_inc_refc(&prt->common);
-#else
- erts_atomic32_inc_nob(&prt->refc);
-#endif
+ erts_ptab_atmc_inc_refc(&prt->common);
}
ERTS_GLB_INLINE void erts_port_dec_refc(Port *prt)
{
-#ifdef ERTS_SMP
- int referred = erts_ptab_dec_test_refc(&prt->common);
+ int referred = erts_ptab_atmc_dec_test_refc(&prt->common);
if (!referred)
erts_port_free(prt);
-#else
- int refc = erts_atomic32_dec_read_nob(&prt->refc);
- if (refc == 0)
- erts_port_free(prt);
-#endif
}
ERTS_GLB_INLINE void erts_port_add_refc(Port *prt, Sint32 add_refc)
{
-#ifdef ERTS_SMP
- int referred = erts_ptab_add_test_refc(&prt->common, add_refc);
+ int referred = erts_ptab_atmc_add_test_refc(&prt->common, add_refc);
if (!referred)
erts_port_free(prt);
-#else
- int refc = erts_atomic32_add_read_nob(&prt->refc, add_refc);
- if (refc == 0)
- erts_port_free(prt);
-#endif
+}
+
+ERTS_GLB_INLINE Sint erts_port_read_refc(Port *prt)
+{
+ return erts_ptab_atmc_read_refc(&prt->common);
}
ERTS_GLB_INLINE int
@@ -463,6 +489,7 @@ ERTS_GLB_INLINE Port*erts_id2port(Eterm id);
ERTS_GLB_INLINE Port *erts_id2port_sflgs(Eterm, Process *, ErtsProcLocks, Uint32);
ERTS_GLB_INLINE void erts_port_release(Port *);
#ifdef ERTS_SMP
+ERTS_GLB_INLINE Port *erts_thr_port_lookup(Eterm id, Uint32 invalid_sflgs);
ERTS_GLB_INLINE Port *erts_thr_id2port_sflgs(Eterm id, Uint32 invalid_sflgs);
ERTS_GLB_INLINE void erts_thr_port_release(Port *prt);
#endif
@@ -602,6 +629,44 @@ erts_port_release(Port *prt)
}
#ifdef ERTS_SMP
+/*
+ * erts_thr_id2port_sflgs() and erts_port_dec_refc(prt) can
+ * be used by unmanaged threads in the SMP case.
+ */
+ERTS_GLB_INLINE Port *
+erts_thr_port_lookup(Eterm id, Uint32 invalid_sflgs)
+{
+ Port *prt;
+ ErtsThrPrgrDelayHandle dhndl;
+
+ if (is_not_internal_port(id))
+ return NULL;
+
+ dhndl = erts_thr_progress_unmanaged_delay();
+
+ prt = (Port *) erts_ptab_pix2intptr_ddrb(&erts_port,
+ internal_port_index(id));
+
+ if (!prt || prt->common.id != id) {
+ erts_thr_progress_unmanaged_continue(dhndl);
+ return NULL;
+ }
+ else {
+ erts_aint32_t state;
+ erts_port_inc_refc(prt);
+
+ if (dhndl != ERTS_THR_PRGR_DHANDLE_MANAGED)
+ erts_thr_progress_unmanaged_continue(dhndl);
+
+ state = erts_atomic32_read_acqb(&prt->state);
+ if (state & invalid_sflgs) {
+ erts_port_dec_refc(prt);
+ return NULL;
+ }
+
+ return prt;
+ }
+}
/*
* erts_thr_id2port_sflgs() and erts_thr_port_release() can
@@ -697,7 +762,7 @@ erts_drvport2port_state(ErlDrvPort drvport, erts_aint32_t *statep)
Port *prt = ERTS_ErlDrvPort2Port(drvport);
erts_aint32_t state;
ASSERT(prt);
- ERTS_LC_ASSERT(erts_lc_is_emu_thr());
+// ERTS_LC_ASSERT(erts_lc_is_emu_thr());
if (prt == ERTS_INVALID_ERL_DRV_PORT)
return ERTS_INVALID_ERL_DRV_PORT;
ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)
@@ -787,16 +852,20 @@ void erts_port_resume_procs(Port *);
struct binary;
-#define ERTS_P2P_SIG_TYPE_BAD 0
-#define ERTS_P2P_SIG_TYPE_OUTPUT 1
-#define ERTS_P2P_SIG_TYPE_OUTPUTV 2
-#define ERTS_P2P_SIG_TYPE_CONNECT 3
-#define ERTS_P2P_SIG_TYPE_EXIT 4
-#define ERTS_P2P_SIG_TYPE_CONTROL 5
-#define ERTS_P2P_SIG_TYPE_CALL 6
-#define ERTS_P2P_SIG_TYPE_INFO 7
-#define ERTS_P2P_SIG_TYPE_LINK 8
-#define ERTS_P2P_SIG_TYPE_UNLINK 9
+enum {
+ ERTS_P2P_SIG_TYPE_BAD = 0,
+ ERTS_P2P_SIG_TYPE_OUTPUT = 1,
+ ERTS_P2P_SIG_TYPE_OUTPUTV = 2,
+ ERTS_P2P_SIG_TYPE_CONNECT = 3,
+ ERTS_P2P_SIG_TYPE_EXIT = 4,
+ ERTS_P2P_SIG_TYPE_CONTROL = 5,
+ ERTS_P2P_SIG_TYPE_CALL = 6,
+ ERTS_P2P_SIG_TYPE_INFO = 7,
+ ERTS_P2P_SIG_TYPE_LINK = 8,
+ ERTS_P2P_SIG_TYPE_UNLINK = 9,
+ ERTS_P2P_SIG_TYPE_MONITOR = 10,
+ ERTS_P2P_SIG_TYPE_DEMONITOR = 11
+};
#define ERTS_P2P_SIG_TYPE_BITS 4
#define ERTS_P2P_SIG_TYPE_MASK \
@@ -858,6 +927,15 @@ struct ErtsProc2PortSigData_ {
struct {
Eterm from;
} unlink;
+ struct {
+ Eterm origin; /* who receives monitor event, pid */
+ Eterm name; /* either name for named monitor, or port id */
+ } monitor;
+ struct {
+ Eterm origin; /* who is at the other end of the monitor, pid */
+ Eterm name; /* port id */
+ Uint32 ref[ERTS_MAX_REF_NUMBERS]; /* box contents of a ref */
+ } demonitor;
} u;
} ;
@@ -920,7 +998,7 @@ erts_schedule_proc2port_signal(Process *,
ErtsPortTaskHandle *,
ErtsProc2PortSigCallback);
-int erts_deliver_port_exit(Port *, Eterm, Eterm, int);
+int erts_deliver_port_exit(Port *, Eterm, Eterm, int, int);
/*
* Port signal flags
@@ -954,4 +1032,34 @@ ErtsPortOpResult erts_port_control(Process *, Port *, unsigned int, Eterm, Eterm
ErtsPortOpResult erts_port_call(Process *, Port *, unsigned int, Eterm, Eterm *);
ErtsPortOpResult erts_port_info(Process *, Port *, Eterm, Eterm *);
+/* Creates monitor between Origin and Target. Ref must be initialized to
+ * a reference (ref may be rewritten to be used to serve additionally as a
+ * signal id). Name is atom if user monitors port by name or NIL */
+ErtsPortOpResult erts_port_monitor(Process *origin, Port *target, Eterm name,
+ Eterm *ref);
+
+typedef enum {
+ /* Normal demonitor rules apply with locking and reductions bump */
+ ERTS_PORT_DEMONITOR_NORMAL = 1,
+ /* Relaxed demonitor rules when process is about to die, which means that
+ * pid lookup won't work, locks won't work, no reductions bump. */
+ ERTS_PORT_DEMONITOR_ORIGIN_ON_DEATHBED = 2,
+} ErtsDemonitorMode;
+
+/* Removes monitor between origin and target, identified by ref.
+ * origin_is_dying can be 0 (false, normal locking rules and reductions bump
+ * apply) or 1 (true, in case when we avoid origin locking) */
+ErtsPortOpResult erts_port_demonitor(Process *origin, ErtsDemonitorMode mode,
+ Port *target, Eterm ref,
+ Eterm *trap_ref);
+/* defined in erl_bif_port.c */
+Port *erts_sig_lookup_port(Process *c_p, Eterm id_or_name);
+
+int erts_port_output_async(Port *, Eterm, Eterm);
+
+/*
+ * Signals from ports to ports. Used by sys drivers.
+ */
+int erl_drv_port_control(Eterm, char, char*, ErlDrvSizeT);
+
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-29 09:57:40 +0000