#include "fdev-epoll.h"
#endif
-#if 0
-#define _alert_ "do you really want to remove signal monitoring?"
-#define sig_monitor_init_timeouts() ((void)0)
-#define sig_monitor_clean_timeouts() ((void)0)
-#define sig_monitor(to,cb,arg) (cb(0,arg))
-#endif
-
#define EVENT_TIMEOUT_TOP ((uint64_t)-1)
#define EVENT_TIMEOUT_CHILD ((uint64_t)10000)
+struct thread;
+
/** Internal shortcut for callback */
typedef void (*job_cb_t)(int, void*);
struct sd_event *sdev; /**< the systemd event loop */
pthread_cond_t cond; /**< condition */
struct fdev *fdev; /**< handling of events */
+ struct thread *holder; /**< holder of the evloop */
};
#define EVLOOP_STATE_WAIT 1U
job = malloc(sizeof *job);
pthread_mutex_lock(&mutex);
if (!job) {
- errno = -ENOMEM;
+ errno = ENOMEM;
goto end;
}
}
if (!signum) {
current_evloop = el;
__atomic_store_n(&el->state, EVLOOP_STATE_LOCK|EVLOOP_STATE_RUN|EVLOOP_STATE_WAIT, __ATOMIC_RELAXED);
+ __atomic_store_n(&el->holder, current_thread, __ATOMIC_RELAXED);
se = el->sdev;
rc = sd_event_prepare(se);
if (rc < 0) {
/* release the event loop */
if (current_evloop) {
__atomic_and_fetch(¤t_evloop->state, ~EVLOOP_STATE_LOCK, __ATOMIC_RELAXED);
+ __atomic_store_n(¤t_evloop->holder, NULL, __ATOMIC_RELAXED);
current_evloop = NULL;
}
if (el->sdev && !__atomic_load_n(&el->state, __ATOMIC_RELAXED)) {
/* run the events */
__atomic_store_n(&el->state, EVLOOP_STATE_LOCK|EVLOOP_STATE_RUN|EVLOOP_STATE_WAIT, __ATOMIC_RELAXED);
+ __atomic_store_n(&el->holder, me, __ATOMIC_RELAXED);
current_evloop = el;
pthread_mutex_unlock(&mutex);
sig_monitor(0, evloop_run, el);
/* release the event loop */
if (current_evloop) {
__atomic_and_fetch(¤t_evloop->state, ~EVLOOP_STATE_LOCK, __ATOMIC_RELAXED);
+ __atomic_store_n(&el->holder, NULL, __ATOMIC_RELAXED);
current_evloop = NULL;
}
return do_sync(group, timeout, enter_cb, &sync);
}
+/**
+ * Internal callback for evloop management.
+ * The effect of this function is hidden: it exits
+ * the waiting poll if any. Then it wakes up a thread
+ * awaiting the evloop using signal.
+ */
+static int on_evloop_efd(sd_event_source *s, int fd, uint32_t revents, void *userdata)
+{
+ uint64_t x;
+ struct evloop *evloop = userdata;
+ read(evloop->efd, &x, sizeof x);
+ pthread_mutex_lock(&mutex);
+ pthread_cond_broadcast(&evloop->cond);
+ pthread_mutex_unlock(&mutex);
+ return 1;
+}
+
+/**
+ * unlock the event loop if needed by sending
+ * an event.
+ * @param el the event loop to unlock
+ * @param wait wait the unlocked state of the event loop
+ */
+static void unlock_evloop(struct evloop *el, int wait)
+{
+ /* wait for a modifiable event loop */
+ while (__atomic_load_n(&el->state, __ATOMIC_RELAXED) & EVLOOP_STATE_WAIT) {
+ uint64_t x = 1;
+ write(el->efd, &x, sizeof x);
+ if (!wait)
+ break;
+ pthread_cond_wait(&el->cond, &mutex);
+ }
+}
+
/**
* Unlocks the execution flow designed by 'jobloop'.
* @param jobloop indication of the flow to unlock
int jobs_leave(struct jobloop *jobloop)
{
struct thread *t;
+ int i;
pthread_mutex_lock(&mutex);
t = threads;
t->stop = 1;
if (t->waits)
pthread_cond_broadcast(&cond);
+ else {
+ i = (int)(sizeof evloop / sizeof *evloop);
+ while(i) {
+ if (evloop[--i].holder == t) {
+ unlock_evloop(&evloop[i], 0);
+ break;
+ }
+ }
+ }
}
pthread_mutex_unlock(&mutex);
return -!t;
return do_sync(group, timeout, call_cb, &sync);
}
-/**
- * Internal callback for evloop management.
- * The effect of this function is hidden: it exits
- * the waiting poll if any. Then it wakes up a thread
- * awaiting the evloop using signal.
- */
-static int on_evloop_efd(sd_event_source *s, int fd, uint32_t revents, void *userdata)
-{
- uint64_t x;
- struct evloop *evloop = userdata;
- read(evloop->efd, &x, sizeof x);
- pthread_mutex_lock(&mutex);
- pthread_cond_broadcast(&evloop->cond);
- pthread_mutex_unlock(&mutex);
- return 1;
-}
-
/* temporary hack */
#if !defined(REMOVE_SYSTEMD_EVENT)
__attribute__((unused))
static struct sd_event *get_sd_event_locked()
{
struct evloop *el;
- uint64_t x;
int rc;
/* creates the evloop on need */
/* attach the event loop to the current thread */
if (current_evloop != el) {
- if (current_evloop)
+ if (current_evloop) {
__atomic_and_fetch(¤t_evloop->state, ~EVLOOP_STATE_LOCK, __ATOMIC_RELAXED);
+ __atomic_store_n(¤t_evloop->holder, NULL, __ATOMIC_RELAXED);
+ }
current_evloop = el;
__atomic_or_fetch(&el->state, EVLOOP_STATE_LOCK, __ATOMIC_RELAXED);
+ __atomic_store_n(&el->holder, current_thread, __ATOMIC_RELAXED);
}
/* wait for a modifiable event loop */
- while (__atomic_load_n(&el->state, __ATOMIC_RELAXED) & EVLOOP_STATE_WAIT) {
- x = 1;
- write(el->efd, &x, sizeof x);
- pthread_cond_wait(&el->cond, &mutex);
- }
+ unlock_evloop(el, 1);
return el->sdev;
}
goto error;
}
- /* start */
- if (sig_monitor_init() < 0) {
- ERROR("failed to initialise signal handlers");
- goto error;
- }
-
/* records the allowed count */
allowed = allowed_count;
started = 0;
remains--;
/* run until end */
+ running++;
thread_run(&me);
+ running--;
rc = 0;
error:
pthread_mutex_unlock(&mutex);