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Mask SIGALRM everything but in the main thread.

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This is required to ensure that the signal will be delivered to the main
thread when the watchdog timer expires.
This commit is contained in:
antirez 2012-03-27 13:48:53 +02:00
parent 469dfe73f2
commit b460c6596e
1 changed files with 9 additions and 0 deletions
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9
src/bio.c
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@ -108,9 +108,18 @@ void bioCreateBackgroundJob(int type, void *arg1, void *arg2, void *arg3) {
void *bioProcessBackgroundJobs(void *arg) { void *bioProcessBackgroundJobs(void *arg) {
struct bio_job *job; struct bio_job *job;
unsigned long type = (unsigned long) arg; unsigned long type = (unsigned long) arg;
sigset_t sigset;
pthread_detach(pthread_self()); pthread_detach(pthread_self());
pthread_mutex_lock(&bio_mutex[type]); pthread_mutex_lock(&bio_mutex[type]);
/* Block SIGALRM so we are sure that only the main thread will
* receive the watchdog signal. */
sigemptyset(&sigset);
sigaddset(&sigset, SIGALRM);
if (pthread_sigmask(SIG_BLOCK, &sigset, NULL))
redisLog(REDIS_WARNING,
"Warning: can't mask SIGALRM in bio.c thread: %s", strerror(errno));
while(1) { while(1) {
listNode *ln; listNode *ln;