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path: root/src/libsystemd-bus/sd-event.c
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Diffstat (limited to 'src/libsystemd-bus/sd-event.c')
-rw-r--r--src/libsystemd-bus/sd-event.c318
1 files changed, 142 insertions, 176 deletions
diff --git a/src/libsystemd-bus/sd-event.c b/src/libsystemd-bus/sd-event.c
index 482e3bb8a5..e9f4290e7c 100644
--- a/src/libsystemd-bus/sd-event.c
+++ b/src/libsystemd-bus/sd-event.c
@@ -333,8 +333,7 @@ int sd_event_new(sd_event** ret) {
sd_event *e;
int r;
- if (!ret)
- return -EINVAL;
+ assert_return(ret, -EINVAL);
e = new0(sd_event, 1);
if (!e)
@@ -368,8 +367,7 @@ fail:
}
sd_event* sd_event_ref(sd_event *e) {
- if (!e)
- return NULL;
+ assert_return(e, NULL);
assert(e->n_ref >= 1);
e->n_ref++;
@@ -378,8 +376,7 @@ sd_event* sd_event_ref(sd_event *e) {
}
sd_event* sd_event_unref(sd_event *e) {
- if (!e)
- return NULL;
+ assert_return(e, NULL);
assert(e->n_ref >= 1);
e->n_ref--;
@@ -416,7 +413,11 @@ static int source_io_unregister(sd_event_source *s) {
return 0;
}
-static int source_io_register(sd_event_source *s, int enabled, uint32_t events) {
+static int source_io_register(
+ sd_event_source *s,
+ int enabled,
+ uint32_t events) {
+
struct epoll_event ev = {};
int r;
@@ -561,19 +562,13 @@ int sd_event_add_io(
sd_event_source *s;
int r;
- if (!e)
- return -EINVAL;
- if (fd < 0)
- return -EINVAL;
- if (events & ~(EPOLLIN|EPOLLOUT|EPOLLRDHUP|EPOLLPRI|EPOLLERR|EPOLLHUP))
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (!ret)
- return -EINVAL;
+ assert_return(e, -EINVAL);
+ assert_return(fd >= 0, -EINVAL);
+ assert_return(!(events & ~(EPOLLIN|EPOLLOUT|EPOLLRDHUP|EPOLLPRI|EPOLLERR|EPOLLHUP)), -EINVAL);
+ assert_return(callback, -EINVAL);
+ assert_return(ret, -EINVAL);
assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
- if (event_pid_changed(e))
- return -ECHILD;
+ assert_return(!event_pid_changed(e), -ECHILD);
s = source_new(e, SOURCE_IO);
if (!s)
@@ -655,19 +650,13 @@ static int event_add_time_internal(
sd_event_source *s;
int r;
- if (!e)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (!ret)
- return -EINVAL;
- if (usec == (uint64_t) -1)
- return -EINVAL;
- if (accuracy == (uint64_t) -1)
- return -EINVAL;
+ assert_return(e, -EINVAL);
+ assert_return(callback, -EINVAL);
+ assert_return(ret, -EINVAL);
+ assert_return(usec != (uint64_t) -1, -EINVAL);
+ assert_return(accuracy != (uint64_t) -1, -EINVAL);
assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
- if (event_pid_changed(e))
- return -ECHILD;
+ assert_return(!event_pid_changed(e), -ECHILD);
assert(timer_fd);
assert(earliest);
@@ -758,23 +747,23 @@ static int event_update_signal_fd(sd_event *e) {
return 0;
}
-int sd_event_add_signal(sd_event *e, int sig, sd_signal_handler_t callback, void *userdata, sd_event_source **ret) {
+int sd_event_add_signal(
+ sd_event *e,
+ int sig,
+ sd_signal_handler_t callback,
+ void *userdata,
+ sd_event_source **ret) {
+
sd_event_source *s;
int r;
- if (!e)
- return -EINVAL;
- if (sig <= 0)
- return -EINVAL;
- if (sig >= _NSIG)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (!ret)
- return -EINVAL;
+ 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);
- if (event_pid_changed(e))
- return -ECHILD;
+ assert_return(!event_pid_changed(e), -ECHILD);
if (!e->signal_sources) {
e->signal_sources = new0(sd_event_source*, _NSIG);
@@ -807,23 +796,25 @@ int sd_event_add_signal(sd_event *e, int sig, sd_signal_handler_t callback, void
return 0;
}
-int sd_event_add_child(sd_event *e, pid_t pid, int options, sd_child_handler_t callback, void *userdata, sd_event_source **ret) {
+int sd_event_add_child(
+ sd_event *e,
+ pid_t pid,
+ int options,
+ sd_child_handler_t callback,
+ void *userdata,
+ sd_event_source **ret) {
+
sd_event_source *s;
int r;
- if (!e)
- return -EINVAL;
- if (pid <= 1)
- return -EINVAL;
- if (options & ~(WEXITED|WSTOPPED|WCONTINUED))
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (!ret)
- return -EINVAL;
+ assert_return(e, -EINVAL);
+ assert_return(pid > 1, -EINVAL);
+ 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);
- if (event_pid_changed(e))
- return -ECHILD;
+ assert_return(!event_pid_changed(e), -ECHILD);
r = hashmap_ensure_allocated(&e->child_sources, trivial_hash_func, trivial_compare_func);
if (r < 0)
@@ -866,17 +857,20 @@ int sd_event_add_child(sd_event *e, pid_t pid, int options, sd_child_handler_t c
return 0;
}
-int sd_event_add_defer(sd_event *e, sd_defer_handler_t callback, void *userdata, sd_event_source **ret) {
+int sd_event_add_defer(
+ sd_event *e,
+ sd_defer_handler_t callback,
+ void *userdata,
+ sd_event_source **ret) {
+
sd_event_source *s;
int r;
- if (!e)
- return -EINVAL;
- if (!ret)
- return -EINVAL;
+ assert_return(e, -EINVAL);
+ assert_return(callback, -EINVAL);
+ assert_return(ret, -EINVAL);
assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
- if (event_pid_changed(e))
- return -ECHILD;
+ assert_return(!event_pid_changed(e), -ECHILD);
s = source_new(e, SOURCE_DEFER);
if (!s)
@@ -896,12 +890,18 @@ int sd_event_add_defer(sd_event *e, sd_defer_handler_t callback, void *userdata,
return 0;
}
-int sd_event_add_quit(sd_event *e, sd_quit_handler_t callback, void *userdata, sd_event_source **ret) {
+int sd_event_add_quit(
+ sd_event *e,
+ sd_quit_handler_t callback,
+ void *userdata,
+ sd_event_source **ret) {
+
sd_event_source *s;
int r;
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);
@@ -952,42 +952,33 @@ sd_event_source* sd_event_source_unref(sd_event_source *s) {
}
sd_event *sd_event_get(sd_event_source *s) {
- if (!s)
- return NULL;
+ assert_return(s, NULL);
return s->event;
}
int sd_event_source_get_pending(sd_event_source *s) {
- if (!s)
- return -EINVAL;
+ assert_return(s, -EINVAL);
+ assert_return(s->type != SOURCE_QUIT, -EDOM);
assert_return(s->event->state != SD_EVENT_FINISHED, -ESTALE);
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(!event_pid_changed(s->event), -ECHILD);
return s->pending;
}
int sd_event_source_get_io_fd(sd_event_source *s) {
- if (!s)
- return -EINVAL;
- if (s->type != SOURCE_IO)
- return -EDOM;
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(s, -EINVAL);
+ assert_return(s->type == SOURCE_IO, -EDOM);
+ assert_return(!event_pid_changed(s->event), -ECHILD);
return s->io.fd;
}
int sd_event_source_get_io_events(sd_event_source *s, uint32_t* events) {
- if (!s)
- return -EINVAL;
- if (s->type != SOURCE_IO)
- return -EDOM;
- if (!events)
- return -EINVAL;
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(s, -EINVAL);
+ assert_return(events, -EINVAL);
+ assert_return(s->type == SOURCE_IO, -EDOM);
+ assert_return(!event_pid_changed(s->event), -ECHILD);
*events = s->io.events;
return 0;
@@ -996,15 +987,11 @@ int sd_event_source_get_io_events(sd_event_source *s, uint32_t* events) {
int sd_event_source_set_io_events(sd_event_source *s, uint32_t events) {
int r;
- if (!s)
- return -EINVAL;
- if (!s->type != SOURCE_IO)
- return -EDOM;
- if (events & ~(EPOLLIN|EPOLLOUT|EPOLLRDHUP|EPOLLPRI|EPOLLERR|EPOLLHUP))
- return -EINVAL;
+ assert_return(s, -EINVAL);
+ assert_return(s->type == SOURCE_IO, -EDOM);
+ assert_return(!(events & ~(EPOLLIN|EPOLLOUT|EPOLLRDHUP|EPOLLPRI|EPOLLERR|EPOLLHUP)), -EINVAL);
assert_return(s->event->state != SD_EVENT_FINISHED, -ESTALE);
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(!event_pid_changed(s->event), -ECHILD);
if (s->io.events == events)
return 0;
@@ -1021,48 +1008,35 @@ int sd_event_source_set_io_events(sd_event_source *s, uint32_t events) {
}
int sd_event_source_get_io_revents(sd_event_source *s, uint32_t* revents) {
- if (!s)
- return -EINVAL;
- if (s->type != SOURCE_IO)
- return -EDOM;
- if (!revents)
- return -EINVAL;
- if (!s->pending)
- return -ENODATA;
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(s, -EINVAL);
+ assert_return(revents, -EINVAL);
+ assert_return(s->type == SOURCE_IO, -EDOM);
+ assert_return(s->pending, -ENODATA);
+ assert_return(!event_pid_changed(s->event), -ECHILD);
*revents = s->io.revents;
return 0;
}
int sd_event_source_get_signal(sd_event_source *s) {
- if (!s)
- return -EINVAL;
- if (s->type != SOURCE_SIGNAL)
- return -EDOM;
- assert_return(s->event->state != SD_EVENT_FINISHED, -ESTALE);
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(s, -EINVAL);
+ assert_return(s->type == SOURCE_SIGNAL, -EDOM);
+ assert_return(!event_pid_changed(s->event), -ECHILD);
return s->signal.sig;
}
int sd_event_source_get_priority(sd_event_source *s, int *priority) {
- if (!s)
- return -EINVAL;
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(s, -EINVAL);
+ assert_return(!event_pid_changed(s->event), -ECHILD);
return s->priority;
}
int sd_event_source_set_priority(sd_event_source *s, int priority) {
- if (!s)
- return -EINVAL;
+ assert_return(s, -EINVAL);
assert_return(s->event->state != SD_EVENT_FINISHED, -ESTALE);
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(!event_pid_changed(s->event), -ECHILD);
if (s->priority == priority)
return 0;
@@ -1075,16 +1049,16 @@ int sd_event_source_set_priority(sd_event_source *s, int priority) {
if (s->prepare)
prioq_reshuffle(s->event->prepare, s, &s->prepare_index);
+ if (s->type == SOURCE_QUIT)
+ prioq_reshuffle(s->event->quit, s, &s->quit.prioq_index);
+
return 0;
}
int sd_event_source_get_enabled(sd_event_source *s, int *m) {
- if (!s)
- return -EINVAL;
- if (!m)
- return -EINVAL;
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(s, -EINVAL);
+ assert_return(m, -EINVAL);
+ assert_return(!event_pid_changed(s->event), -ECHILD);
*m = s->enabled;
return 0;
@@ -1093,13 +1067,10 @@ int sd_event_source_get_enabled(sd_event_source *s, int *m) {
int sd_event_source_set_enabled(sd_event_source *s, int m) {
int r;
- if (!s)
- return -EINVAL;
- if (m != SD_EVENT_OFF && m != SD_EVENT_ON && !SD_EVENT_ONESHOT)
- return -EINVAL;
+ 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);
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(!event_pid_changed(s->event), -ECHILD);
if (s->enabled == m)
return 0;
@@ -1150,9 +1121,13 @@ int sd_event_source_set_enabled(sd_event_source *s, int m) {
break;
- case SOURCE_DEFER:
case SOURCE_QUIT:
s->enabled = m;
+ prioq_reshuffle(s->event->quit, s, &s->quit.prioq_index);
+ break;
+
+ case SOURCE_DEFER:
+ s->enabled = m;
break;
}
@@ -1201,9 +1176,13 @@ int sd_event_source_set_enabled(sd_event_source *s, int m) {
}
break;
- case SOURCE_DEFER:
case SOURCE_QUIT:
s->enabled = m;
+ prioq_reshuffle(s->event->quit, s, &s->quit.prioq_index);
+ break;
+
+ case SOURCE_DEFER:
+ s->enabled = m;
break;
}
}
@@ -1218,29 +1197,21 @@ int sd_event_source_set_enabled(sd_event_source *s, int m) {
}
int sd_event_source_get_time(sd_event_source *s, uint64_t *usec) {
- if (!s)
- return -EINVAL;
- if (!usec)
- return -EINVAL;
- if (s->type != SOURCE_REALTIME && s->type != SOURCE_MONOTONIC)
- return -EDOM;
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(s, -EINVAL);
+ assert_return(usec, -EINVAL);
+ assert_return(s->type == SOURCE_REALTIME || s->type == SOURCE_MONOTONIC, -EDOM);
+ assert_return(!event_pid_changed(s->event), -ECHILD);
*usec = s->time.next;
return 0;
}
int sd_event_source_set_time(sd_event_source *s, uint64_t usec) {
- if (!s)
- return -EINVAL;
- if (usec == (uint64_t) -1)
- return -EINVAL;
- if (s->type != SOURCE_REALTIME && s->type != SOURCE_MONOTONIC)
- return -EDOM;
+ assert_return(s, -EINVAL);
+ assert_return(usec != (uint64_t) -1, -EINVAL);
+ assert_return(s->type == SOURCE_REALTIME || s->type == SOURCE_MONOTONIC, -EDOM);
assert_return(s->event->state != SD_EVENT_FINISHED, -ESTALE);
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(!event_pid_changed(s->event), -ECHILD);
if (s->time.next == usec)
return 0;
@@ -1258,14 +1229,22 @@ int sd_event_source_set_time(sd_event_source *s, uint64_t usec) {
return 0;
}
+int sd_event_source_get_time_accuracy(sd_event_source *s, uint64_t *usec) {
+ assert_return(s, -EINVAL);
+ assert_return(usec, -EINVAL);
+ assert_return(s->type == SOURCE_REALTIME || s->type == SOURCE_MONOTONIC, -EDOM);
+ assert_return(!event_pid_changed(s->event), -ECHILD);
+
+ *usec = s->time.accuracy;
+ return 0;
+}
+
int sd_event_source_set_time_accuracy(sd_event_source *s, uint64_t usec) {
- if (!s)
- return -EINVAL;
- if (s->type != SOURCE_MONOTONIC && s->type != SOURCE_REALTIME)
- return -EDOM;
+ assert_return(s, -EINVAL);
+ assert_return(usec != (uint64_t) -1, -EINVAL);
+ assert_return(s->type == SOURCE_REALTIME || s->type == SOURCE_MONOTONIC, -EDOM);
assert_return(s->event->state != SD_EVENT_FINISHED, -ESTALE);
- if (event_pid_changed(s->event))
- return -ECHILD;
+ assert_return(!event_pid_changed(s->event), -ECHILD);
if (usec == 0)
usec = DEFAULT_ACCURACY_USEC;
@@ -1283,20 +1262,6 @@ int sd_event_source_set_time_accuracy(sd_event_source *s, uint64_t usec) {
return 0;
}
-int sd_event_source_get_time_accuracy(sd_event_source *s, uint64_t *usec) {
- if (!s)
- return -EINVAL;
- if (!usec)
- return -EINVAL;
- if (s->type != SOURCE_MONOTONIC && s->type != SOURCE_REALTIME)
- return -EDOM;
- if (event_pid_changed(s->event))
- return -ECHILD;
-
- *usec = s->time.accuracy;
- return 0;
-}
-
int sd_event_source_get_child_pid(sd_event_source *s, pid_t *pid) {
assert_return(s, -EINVAL);
assert_return(pid, -EINVAL);
@@ -1466,9 +1431,7 @@ static int flush_timer(sd_event *e, int fd, uint32_t events) {
assert(e);
assert(fd >= 0);
-
- if (events != EPOLLIN)
- return -EIO;
+ assert_return(events == EPOLLIN, -EIO);
ss = read(fd, &x, sizeof(x));
if (ss < 0) {
@@ -1484,7 +1447,12 @@ static int flush_timer(sd_event *e, int fd, uint32_t events) {
return 0;
}
-static int process_timer(sd_event *e, usec_t n, Prioq *earliest, Prioq *latest) {
+static int process_timer(
+ sd_event *e,
+ usec_t n,
+ Prioq *earliest,
+ Prioq *latest) {
+
sd_event_source *s;
int r;
@@ -1563,9 +1531,7 @@ static int process_signal(sd_event *e, uint32_t events) {
int r;
assert(e);
-
- if (events != EPOLLIN)
- return -EIO;
+ assert_return(events == EPOLLIN, -EIO);
for (;;) {
sd_event_source *s;
@@ -1726,8 +1692,8 @@ static sd_event_source* event_next_pending(sd_event *e) {
int sd_event_run(sd_event *e, uint64_t timeout) {
struct epoll_event ev_queue[EPOLL_QUEUE_MAX];
sd_event_source *p;
- int r, i, m;
dual_timestamp n;
+ int r, i, m;
assert_return(e, -EINVAL);
assert_return(!event_pid_changed(e), -ECHILD);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-24 13:38:28 +0000