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-rw-r--r--erts/emulator/sys/common/erl_check_io.c27
-rw-r--r--erts/emulator/sys/common/erl_check_io.h4
-rw-r--r--erts/emulator/sys/unix/sys.c2
3 files changed, 16 insertions, 17 deletions
diff --git a/erts/emulator/sys/common/erl_check_io.c b/erts/emulator/sys/common/erl_check_io.c
index a533a10c22..4fc95624c7 100644
--- a/erts/emulator/sys/common/erl_check_io.c
+++ b/erts/emulator/sys/common/erl_check_io.c
@@ -1198,7 +1198,7 @@ done_unknown:
return ret;
}
-int
+enum ErlNifSelectReturn
ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
ErlNifEvent e,
enum ErlNifSelectFlags mode,
@@ -1213,7 +1213,7 @@ ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
ErtsPollEvents new_events, old_events;
ErtsDrvEventState *state;
int wake_poller;
- int ret;
+ enum ErlNifSelectReturn ret;
enum { NO_STOP=0, CALL_STOP, CALL_STOP_AND_RELEASE } call_stop = NO_STOP;
#if ERTS_CIO_HAVE_DRV_EVENT
ErtsDrvEventDataState *free_event = NULL;
@@ -1227,11 +1227,11 @@ ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
#ifdef ERTS_SYS_CONTINOUS_FD_NUMBERS
if ((unsigned)fd >= (unsigned)erts_smp_atomic_read_nob(&drv_ev_state_len)) {
if (fd < 0) {
- return -1;
+ return ERL_NIF_SELECT_ERROR | ERL_NIF_SELECT_INVALID_EVENT;
}
if (fd >= max_fds) {
nif_select_large_fd_error(fd, mode, resource, ref);
- return -1;
+ return ERL_NIF_SELECT_ERROR | ERL_NIF_SELECT_INVALID_EVENT;
}
grow_drv_ev_state(fd);
}
@@ -1250,7 +1250,7 @@ ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
if (IS_FD_UNKNOWN(state)) {
/* fast track to stop callback */
call_stop = CALL_STOP;
- ret = 0;
+ ret = ERL_NIF_SELECT_STOP_CALLED;
goto done_unknown;
}
on = 0;
@@ -1303,7 +1303,7 @@ ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
print_nif_select_op(dsbufp, fd, mode, resource, ref);
steal_pending_stop_nif(dsbufp, resource, state, mode, on);
if (state->type == ERTS_EV_TYPE_STOP_NIF) {
- ret = 0;
+ ret = ERL_NIF_SELECT_STOP_SCHEDULED; /* ?? */
goto done;
}
ASSERT(state->type == ERTS_EV_TYPE_NONE);
@@ -1325,7 +1325,7 @@ ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
state->driver.nif->out.ddeselect_cnt = 0;
state->driver.stop.resource = NULL;
}
- ret = -1;
+ ret = ERL_NIF_SELECT_ERROR | ERL_NIF_SELECT_FAILED;
goto done;
}
@@ -1339,8 +1339,7 @@ ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
|| state->type == ERTS_EV_TYPE_NONE);
state->events = new_events;
- if (ctl_events) {
- if (on) {
+ if (on) {
Uint32* refn;
if (!state->driver.nif)
state->driver.nif = alloc_nif_select_data();
@@ -1379,8 +1378,9 @@ ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
}
state->driver.nif->out.ddeselect_cnt = 0;
}
- }
- else { /* off */
+ ret = 0;
+ }
+ else { /* off */
if (state->type == ERTS_EV_TYPE_NIF) {
//erts_fprintf(stderr, "SVERK: enif select clear fd=%d inpid=%T inrsrc=%p\n",
// state->fd, state->driver.nif->inpid,
@@ -1408,6 +1408,7 @@ ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
call_stop = CALL_STOP;
}
state->type = ERTS_EV_TYPE_NONE;
+ ret = ERL_NIF_SELECT_STOP_CALLED;
}
else {
/* Not safe to close fd, postpone stop_select callback. */
@@ -1418,12 +1419,10 @@ ERTS_CIO_EXPORT(enif_select)(ErlNifEnv* env,
enif_keep_resource(resource);
}
state->type = ERTS_EV_TYPE_STOP_NIF;
+ ret = ERL_NIF_SELECT_STOP_SCHEDULED;
}
- }
}
- ret = 0;
-
done:
check_fd_cleanup(state,
diff --git a/erts/emulator/sys/common/erl_check_io.h b/erts/emulator/sys/common/erl_check_io.h
index 242e7cfcf5..41e2e9210a 100644
--- a/erts/emulator/sys/common/erl_check_io.h
+++ b/erts/emulator/sys/common/erl_check_io.h
@@ -34,8 +34,8 @@
int driver_select_kp(ErlDrvPort, ErlDrvEvent, int, int);
int driver_select_nkp(ErlDrvPort, ErlDrvEvent, int, int);
-int enif_select_kp(ErlNifEnv*, ErlNifEvent, enum ErlNifSelectFlags, void*, Eterm);
-int enif_select_nkp(ErlNifEnv*, ErlNifEvent, enum ErlNifSelectFlags, void*, Eterm);
+enum ErlNifSelectReturn enif_select_kp(ErlNifEnv*, ErlNifEvent, enum ErlNifSelectFlags, void*, Eterm);
+enum ErlNifSelectReturn enif_select_nkp(ErlNifEnv*, ErlNifEvent, enum ErlNifSelectFlags, void*, Eterm);
int driver_event_kp(ErlDrvPort, ErlDrvEvent, ErlDrvEventData);
int driver_event_nkp(ErlDrvPort, ErlDrvEvent, ErlDrvEventData);
Uint erts_check_io_size_kp(void);
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index 789b455f2d..5ce57b7b1b 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -161,7 +161,7 @@ int erts_use_kernel_poll = 0;
struct {
int (*select)(ErlDrvPort, ErlDrvEvent, int, int);
- int (*enif_select)(ErlNifEnv*, ErlNifEvent, enum ErlNifSelectFlags, void*, Eterm);
+ enum ErlNifSelectReturn (*enif_select)(ErlNifEnv*, ErlNifEvent, enum ErlNifSelectFlags, void*, Eterm);
int (*event)(ErlDrvPort, ErlDrvEvent, ErlDrvEventData);
void (*check_io_as_interrupt)(void);
void (*check_io_interrupt)(int);