From: José Bollo <jose.bollo@iot.bzh>
Date: Thu, 30 Nov 2017 06:17:31 +0000 (+0100)
Subject: jobs: Fix possible race condition
X-Git-Tag: 4.99.4~2
X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?p=src%2Fapp-framework-binder.git;a=commitdiff_plain;h=8a0bde7a0b5b61a08a43a5bf374fc4705b788684

jobs: Fix possible race condition

Sending the signal while not being sure that is is
expected could be a race condition. Taking the mutex
avoids it.

In the same time, switch to broadcasting.

Change-Id: I3f43d0d860cccc61ec140ceef223f572f806872c
Signed-off-by: José Bollo <jose.bollo@iot.bzh>
---

diff --git a/src/jobs.c b/src/jobs.c
index 464f1e11..e3df8f57 100644
--- a/src/jobs.c
+++ b/src/jobs.c
@@ -636,7 +636,9 @@ static int on_evloop_efd(sd_event_source *s, int fd, uint32_t revents, void *use
 	uint64_t x;
 	struct evloop *evloop = userdata;
 	read(evloop->efd, &x, sizeof x);
-	pthread_cond_signal(&evloop->cond);	
+	pthread_mutex_lock(&mutex);
+	pthread_cond_broadcast(&evloop->cond);	
+	pthread_mutex_unlock(&mutex);
 	return 1;
 }
 
@@ -656,7 +658,7 @@ struct sd_event *jobs_get_sd_event()
 	el = &evloop[0];
 	if (!el->sdev) {
 		/* creates the eventfd for waking up polls */
-		el->efd = eventfd(0, EFD_CLOEXEC|EFD_SEMAPHORE);
+		el->efd = eventfd(0, EFD_CLOEXEC);
 		if (el->efd < 0) {
 			ERROR("can't make eventfd for events");
 			goto error1;