#include "time-util.h"
#include "missing.h"
#include "set.h"
+#include "list.h"
#include "sd-event.h"
SOURCE_POST,
SOURCE_EXIT,
SOURCE_WATCHDOG,
- _SOUFCE_EVENT_SOURCE_TYPE_MAX,
+ _SOURCE_EVENT_SOURCE_TYPE_MAX,
_SOURCE_EVENT_SOURCE_TYPE_INVALID = -1
} EventSourceType;
int enabled:3;
bool pending:1;
bool dispatching:1;
+ bool floating:1;
int64_t priority;
unsigned pending_index;
unsigned pending_iteration;
unsigned prepare_iteration;
+ LIST_FIELDS(sd_event_source, sources);
+
union {
struct {
sd_event_io_handler_t callback;
usec_t watchdog_last, watchdog_period;
unsigned n_sources;
+
+ LIST_HEAD(sd_event_source, sources);
};
+static void source_disconnect(sd_event_source *s);
+
static int pending_prioq_compare(const void *a, const void *b) {
const sd_event_source *x = a, *y = b;
}
static void event_free(sd_event *e) {
+ sd_event_source *s;
+
assert(e);
+
+ while ((s = e->sources)) {
+ assert(s->floating);
+ source_disconnect(s);
+ sd_event_source_unref(s);
+ }
+
assert(e->n_sources == 0);
if (e->default_event_ptr)
}
}
-static void source_free(sd_event_source *s) {
+static void source_disconnect(sd_event_source *s) {
+ sd_event *event;
+
assert(s);
- if (s->event) {
- assert(s->event->n_sources > 0);
+ if (!s->event)
+ return;
- switch (s->type) {
+ assert(s->event->n_sources > 0);
- case SOURCE_IO:
- if (s->io.fd >= 0)
- source_io_unregister(s);
+ switch (s->type) {
- break;
+ case SOURCE_IO:
+ if (s->io.fd >= 0)
+ source_io_unregister(s);
- case SOURCE_TIME_REALTIME:
- case SOURCE_TIME_MONOTONIC:
- case SOURCE_TIME_REALTIME_ALARM:
- case SOURCE_TIME_BOOTTIME_ALARM: {
- struct clock_data *d;
+ break;
- d = event_get_clock_data(s->event, s->type);
- assert(d);
+ case SOURCE_TIME_REALTIME:
+ case SOURCE_TIME_MONOTONIC:
+ case SOURCE_TIME_REALTIME_ALARM:
+ case SOURCE_TIME_BOOTTIME_ALARM: {
+ struct clock_data *d;
- prioq_remove(d->earliest, s, &s->time.earliest_index);
- prioq_remove(d->latest, s, &s->time.latest_index);
- break;
+ d = event_get_clock_data(s->event, s->type);
+ assert(d);
+
+ prioq_remove(d->earliest, s, &s->time.earliest_index);
+ prioq_remove(d->latest, s, &s->time.latest_index);
+ break;
+ }
+
+ case SOURCE_SIGNAL:
+ if (s->signal.sig > 0) {
+ if (s->signal.sig != SIGCHLD || s->event->n_enabled_child_sources == 0)
+ assert_se(sigdelset(&s->event->sigset, s->signal.sig) == 0);
+
+ if (s->event->signal_sources)
+ s->event->signal_sources[s->signal.sig] = NULL;
}
- case SOURCE_SIGNAL:
- if (s->signal.sig > 0) {
- if (s->signal.sig != SIGCHLD || s->event->n_enabled_child_sources == 0)
- assert_se(sigdelset(&s->event->sigset, s->signal.sig) == 0);
+ break;
- if (s->event->signal_sources)
- s->event->signal_sources[s->signal.sig] = NULL;
+ case SOURCE_CHILD:
+ if (s->child.pid > 0) {
+ if (s->enabled != SD_EVENT_OFF) {
+ assert(s->event->n_enabled_child_sources > 0);
+ s->event->n_enabled_child_sources--;
}
- break;
+ if (!s->event->signal_sources || !s->event->signal_sources[SIGCHLD])
+ assert_se(sigdelset(&s->event->sigset, SIGCHLD) == 0);
- case SOURCE_CHILD:
- if (s->child.pid > 0) {
- if (s->enabled != SD_EVENT_OFF) {
- assert(s->event->n_enabled_child_sources > 0);
- s->event->n_enabled_child_sources--;
- }
+ hashmap_remove(s->event->child_sources, INT_TO_PTR(s->child.pid));
+ }
- if (!s->event->signal_sources || !s->event->signal_sources[SIGCHLD])
- assert_se(sigdelset(&s->event->sigset, SIGCHLD) == 0);
+ break;
- hashmap_remove(s->event->child_sources, INT_TO_PTR(s->child.pid));
- }
+ case SOURCE_DEFER:
+ /* nothing */
+ break;
- break;
+ case SOURCE_POST:
+ set_remove(s->event->post_sources, s);
+ break;
- case SOURCE_DEFER:
- /* nothing */
- break;
+ case SOURCE_EXIT:
+ prioq_remove(s->event->exit, s, &s->exit.prioq_index);
+ break;
- case SOURCE_POST:
- set_remove(s->event->post_sources, s);
- break;
+ default:
+ assert_not_reached("Wut? I shouldn't exist.");
+ }
- case SOURCE_EXIT:
- prioq_remove(s->event->exit, s, &s->exit.prioq_index);
- break;
+ if (s->pending)
+ prioq_remove(s->event->pending, s, &s->pending_index);
- default:
- assert_not_reached("Wut? I shouldn't exist.");
- }
+ if (s->prepare)
+ prioq_remove(s->event->prepare, s, &s->prepare_index);
- if (s->pending)
- prioq_remove(s->event->pending, s, &s->pending_index);
+ event = s->event;
- if (s->prepare)
- prioq_remove(s->event->prepare, s, &s->prepare_index);
+ s->type = _SOURCE_EVENT_SOURCE_TYPE_INVALID;
+ s->event = NULL;
+ LIST_REMOVE(sources, event->sources, s);
+ event->n_sources--;
- s->event->n_sources--;
- sd_event_unref(s->event);
- }
+ if (!s->floating)
+ sd_event_unref(event);
+}
+
+static void source_free(sd_event_source *s) {
+ assert(s);
+ source_disconnect(s);
free(s);
}
return 0;
}
-static sd_event_source *source_new(sd_event *e, EventSourceType type) {
+static sd_event_source *source_new(sd_event *e, bool floating, EventSourceType type) {
sd_event_source *s;
assert(e);
return NULL;
s->n_ref = 1;
- s->event = sd_event_ref(e);
+ s->event = e;
+ s->floating = floating;
s->type = type;
s->pending_index = s->prepare_index = PRIOQ_IDX_NULL;
+ if (!floating)
+ sd_event_ref(e);
+
+ LIST_PREPEND(sources, e->sources, s);
e->n_sources ++;
return s;
assert_return(fd >= 0, -EINVAL);
assert_return(!(events & ~(EPOLLIN|EPOLLOUT|EPOLLRDHUP|EPOLLPRI|EPOLLERR|EPOLLHUP|EPOLLET)), -EINVAL);
assert_return(callback, -EINVAL);
- assert_return(ret, -EINVAL);
assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
assert_return(!event_pid_changed(e), -ECHILD);
- s = source_new(e, SOURCE_IO);
+ s = source_new(e, !ret, SOURCE_IO);
if (!s)
return -ENOMEM;
return -errno;
}
- *ret = s;
+ if (ret)
+ *ret = s;
+
return 0;
}
int r;
assert_return(e, -EINVAL);
- assert_return(ret, -EINVAL);
assert_return(usec != (uint64_t) -1, -EINVAL);
assert_return(accuracy != (uint64_t) -1, -EINVAL);
assert_return(callback, -EINVAL);
return r;
}
- s = source_new(e, type);
+ s = source_new(e, !ret, type);
if (!s)
return -ENOMEM;
if (r < 0)
goto fail;
- *ret = s;
+ if (ret)
+ *ret = s;
+
return 0;
fail:
return 0;
}
+static int signal_exit_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+ assert(s);
+
+ return sd_event_exit(sd_event_source_get_event(s), PTR_TO_INT(userdata));
+}
+
_public_ int sd_event_add_signal(
sd_event *e,
sd_event_source **ret,
assert_return(e, -EINVAL);
assert_return(sig > 0, -EINVAL);
assert_return(sig < _NSIG, -EINVAL);
- assert_return(callback, -EINVAL);
- assert_return(ret, -EINVAL);
assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
assert_return(!event_pid_changed(e), -ECHILD);
+ if (!callback)
+ callback = signal_exit_callback;
+
r = pthread_sigmask(SIG_SETMASK, NULL, &ss);
if (r < 0)
return -errno;
} else if (e->signal_sources[sig])
return -EBUSY;
- s = source_new(e, SOURCE_SIGNAL);
+ s = source_new(e, !ret, SOURCE_SIGNAL);
if (!s)
return -ENOMEM;
}
}
- *ret = s;
+ if (ret)
+ *ret = s;
+
return 0;
}
assert_return(!(options & ~(WEXITED|WSTOPPED|WCONTINUED)), -EINVAL);
assert_return(options != 0, -EINVAL);
assert_return(callback, -EINVAL);
- assert_return(ret, -EINVAL);
assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
assert_return(!event_pid_changed(e), -ECHILD);
if (hashmap_contains(e->child_sources, INT_TO_PTR(pid)))
return -EBUSY;
- s = source_new(e, SOURCE_CHILD);
+ s = source_new(e, !ret, SOURCE_CHILD);
if (!s)
return -ENOMEM;
e->need_process_child = true;
- *ret = s;
+ if (ret)
+ *ret = s;
+
return 0;
}
assert_return(e, -EINVAL);
assert_return(callback, -EINVAL);
- assert_return(ret, -EINVAL);
assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
assert_return(!event_pid_changed(e), -ECHILD);
- s = source_new(e, SOURCE_DEFER);
+ s = source_new(e, !ret, SOURCE_DEFER);
if (!s)
return -ENOMEM;
return r;
}
- *ret = s;
+ if (ret)
+ *ret = s;
+
return 0;
}
assert_return(e, -EINVAL);
assert_return(callback, -EINVAL);
- assert_return(ret, -EINVAL);
assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
assert_return(!event_pid_changed(e), -ECHILD);
if (r < 0)
return r;
- s = source_new(e, SOURCE_POST);
+ s = source_new(e, !ret, SOURCE_POST);
if (!s)
return -ENOMEM;
return r;
}
- *ret = s;
+ if (ret)
+ *ret = s;
+
return 0;
}
assert_return(e, -EINVAL);
assert_return(callback, -EINVAL);
- assert_return(ret, -EINVAL);
assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
assert_return(!event_pid_changed(e), -ECHILD);
return -ENOMEM;
}
- s = source_new(e, SOURCE_EXIT);
+ s = source_new(e, !ret, SOURCE_EXIT);
if (!s)
return -ENOMEM;
return r;
}
- *ret = s;
+ if (ret)
+ *ret = s;
+
return 0;
}
if (s->dispatching) {
if (s->type == SOURCE_IO)
source_io_unregister(s);
+
+ source_disconnect(s);
} else
source_free(s);
}
assert_return(s->event->state != SD_EVENT_FINISHED, -ESTALE);
assert_return(!event_pid_changed(s->event), -ECHILD);
- if (s->io.events == events)
+ /* edge-triggered updates are never skipped, so we can reset edges */
+ if (s->io.events == events && !(events & EPOLLET))
return 0;
if (s->enabled != SD_EVENT_OFF) {
assert_return(s, -EINVAL);
assert_return(m == SD_EVENT_OFF || m == SD_EVENT_ON || m == SD_EVENT_ONESHOT, -EINVAL);
- assert_return(s->event->state != SD_EVENT_FINISHED, -ESTALE);
assert_return(!event_pid_changed(s->event), -ECHILD);
+ /* If we are dead anyway, we are fine with turning off
+ * sources, but everything else needs to fail. */
+ if (s->event->state == SD_EVENT_FINISHED)
+ return m == SD_EVENT_OFF ? 0 : -ESTALE;
+
if (s->enabled == m)
return 0;
break;
case SOURCE_WATCHDOG:
- case _SOUFCE_EVENT_SOURCE_TYPE_MAX:
+ case _SOURCE_EVENT_SOURCE_TYPE_MAX:
case _SOURCE_EVENT_SOURCE_TYPE_INVALID:
assert_not_reached("Wut? I shouldn't exist.");
}
unsigned ev_queue_max;
sd_event_source *p;
int r, i, m;
+ bool timedout;
assert_return(e, -EINVAL);
assert_return(!event_pid_changed(e), -ECHILD);
goto finish;
}
+ timedout = m == 0;
+
dual_timestamp_get(&e->timestamp);
e->timestamp_boottime = now(CLOCK_BOOTTIME);
p = event_next_pending(e);
if (!p) {
- r = 1;
+ r = !timedout;
goto finish;
}
~ianmdlvl / elogind.git / blobdiff