diff options
Diffstat (limited to 'erts/emulator')
| -rw-r--r-- | erts/emulator/sys/common/erl_check_io.c | 62 |
1 files changed, 43 insertions, 19 deletions
diff --git a/erts/emulator/sys/common/erl_check_io.c b/erts/emulator/sys/common/erl_check_io.c index 4019b78074..f93d4c1557 100644 --- a/erts/emulator/sys/common/erl_check_io.c +++ b/erts/emulator/sys/common/erl_check_io.c @@ -298,6 +298,8 @@ static ERTS_INLINE void check_fd_cleanup(ErtsDrvEventState *state, ErtsDrvSelectDataState **free_select, ErtsNifSelectDataState **free_nif); +static ERTS_INLINE void iready(Eterm id, ErtsDrvEventState *state); +static ERTS_INLINE void oready(Eterm id, ErtsDrvEventState *state); #ifdef DEBUG_PRINT_MODE static char *drvmode2str(int mode); static char *nifmode2str(enum ErlNifSelectFlags mode); @@ -460,8 +462,18 @@ erts_io_notify_port_task_executed(ErtsPortTaskType type, if (active_events) { /* This is not needed if active_events has not changed */ if (state->active_events != active_events) { + ErtsPollEvents new_events; state->active_events = active_events; - erts_io_control(state, ERTS_POLL_OP_MOD, active_events); + new_events = erts_io_control(state, ERTS_POLL_OP_MOD, active_events); + + /* We were unable to re-insert the fd into the pollset, signal the callback. */ + if (new_events & (ERTS_POLL_EV_ERR|ERTS_POLL_EV_NVAL)) { + if (active_events & ERTS_POLL_EV_IN) + iready(state->driver.select->inport, state); + if (active_events & ERTS_POLL_EV_OUT) + oready(state->driver.select->outport, state); + state->active_events = 0; + } } } else { check_fd_cleanup(state, &free_select, &free_nif); @@ -564,7 +576,17 @@ deselect(ErtsDrvEventState *state, int mode) state->type = ERTS_EV_TYPE_NONE; state->flags = 0; } else { - erts_io_control(state, ERTS_POLL_OP_MOD, state->active_events); + ErtsPollEvents new_events = + erts_io_control(state, ERTS_POLL_OP_MOD, state->active_events); + + /* We were unable to re-insert the fd into the pollset, signal the callback. */ + if (new_events & (ERTS_POLL_EV_ERR|ERTS_POLL_EV_NVAL)) { + if (state->active_events & ERTS_POLL_EV_IN) + iready(state->driver.select->inport, state); + if (state->active_events & ERTS_POLL_EV_OUT) + oready(state->driver.select->outport, state); + state->active_events = 0; + } } } @@ -619,6 +641,7 @@ driver_select(ErlDrvPort ix, ErlDrvEvent e, int mode, int on) ErtsSysFdType fd = (ErtsSysFdType) e; ErtsPollEvents ctl_events = (ErtsPollEvents) 0; ErtsPollEvents old_events; + ErtsPollEvents new_events; ErtsPollOp ctl_op = ERTS_POLL_OP_MOD; ErtsDrvEventState *state; int wake_poller = 0; @@ -745,23 +768,11 @@ driver_select(ErlDrvPort ix, ErlDrvEvent e, int mode, int on) } if (ctl_events || ctl_op == ERTS_POLL_OP_DEL) { - ErtsPollEvents new_events; new_events = erts_io_control_wakeup(state, ctl_op, state->active_events, &wake_poller); - if (new_events & (ERTS_POLL_EV_ERR|ERTS_POLL_EV_NVAL)) { - if (state->type == ERTS_EV_TYPE_DRV_SEL && !old_events) { - state->type = ERTS_EV_TYPE_NONE; - state->flags = 0; - state->driver.select->inport = NIL; - state->driver.select->outport = NIL; - } - ret = -1; - goto done; - } - ASSERT(state->type == ERTS_EV_TYPE_DRV_SEL || state->type == ERTS_EV_TYPE_NONE); } @@ -772,13 +783,18 @@ driver_select(ErlDrvPort ix, ErlDrvEvent e, int mode, int on) if (state->type == ERTS_EV_TYPE_NONE) state->type = ERTS_EV_TYPE_DRV_SEL; ASSERT(state->type == ERTS_EV_TYPE_DRV_SEL); - if (ctl_events & ERTS_POLL_EV_IN) + if (ctl_events & ERTS_POLL_EV_IN) { state->driver.select->inport = id; - if (ctl_events & ERTS_POLL_EV_OUT) + if (new_events & (ERTS_POLL_EV_ERR|ERTS_POLL_EV_NVAL)) + iready(id, state); + } + if (ctl_events & ERTS_POLL_EV_OUT) { state->driver.select->outport = id; - if (mode & ERL_DRV_USE) { + if (new_events & (ERTS_POLL_EV_ERR|ERTS_POLL_EV_NVAL)) + oready(id, state); + } + if (mode & ERL_DRV_USE) state->flags |= ERTS_EV_FLAG_USED; - } } } else { /* off */ @@ -1598,8 +1614,16 @@ erts_check_io(ErtsPollThread *psi) /* Reactivate the poll op if there are still active events */ if (state->active_events) { + ErtsPollEvents new_events; DEBUG_PRINT_FD("re-enable %s", state, ev2str(state->active_events)); - erts_io_control(state, ERTS_POLL_OP_MOD, state->active_events); + + new_events = erts_io_control(state, ERTS_POLL_OP_MOD, state->active_events); + + /* Unable to re-enable the fd, signal all callbacks */ + if (new_events & (ERTS_POLL_EV_ERR|ERTS_POLL_EV_NVAL)) { + revents |= state->active_events; + state->active_events = 0; + } } } |