Disable signals in URCU background threads

[urcu.git] / src / workqueue.c

diff --git a/src/workqueue.c b/src/workqueue.c
index c9f03b56fbb3ac85c58e5ef21330e03d0377d340..1039d7297b9ce13446c4b81aee86fa217a005eab 100644 (file)
--- a/src/workqueue.c
+++ b/src/workqueue.c
@@ -129,8 +129,6 @@ static int set_thread_cpu_affinity(struct urcu_workqueue *workqueue __attribute_
 
 static void futex_wait(int32_t *futex)
 {
-       int ret;
-
        /* Read condition before read futex */
        cmm_smp_mb();
        while (uatomic_read(futex) == -1) {
@@ -286,6 +284,7 @@ struct urcu_workqueue *urcu_workqueue_create(unsigned long flags,
 {
        struct urcu_workqueue *workqueue;
        int ret;
+       sigset_t newmask, oldmask;
 
        workqueue = malloc(sizeof(*workqueue));
        if (workqueue == NULL)
@@ -306,10 +305,20 @@ struct urcu_workqueue *urcu_workqueue_create(unsigned long flags,
        workqueue->cpu_affinity = cpu_affinity;
        workqueue->loop_count = 0;
        cmm_smp_mb();  /* Structure initialized before pointer is planted. */
+
+       ret = sigfillset(&newmask);
+       urcu_posix_assert(!ret);
+       ret = pthread_sigmask(SIG_BLOCK, &newmask, &oldmask);
+       urcu_posix_assert(!ret);
+
        ret = pthread_create(&workqueue->tid, NULL, workqueue_thread, workqueue);
        if (ret) {
                urcu_die(ret);
        }
+
+       ret = pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
+       urcu_posix_assert(!ret);
+
        return workqueue;
 }
 
@@ -466,13 +475,23 @@ void urcu_workqueue_resume_worker(struct urcu_workqueue *workqueue)
 void urcu_workqueue_create_worker(struct urcu_workqueue *workqueue)
 {
        int ret;
+       sigset_t newmask, oldmask;
 
        /* Clear workqueue state from parent. */
        workqueue->flags &= ~URCU_WORKQUEUE_PAUSED;
        workqueue->flags &= ~URCU_WORKQUEUE_PAUSE;
        workqueue->tid = 0;
+
+       ret = sigfillset(&newmask);
+       urcu_posix_assert(!ret);
+       ret = pthread_sigmask(SIG_BLOCK, &newmask, &oldmask);
+       urcu_posix_assert(!ret);
+
        ret = pthread_create(&workqueue->tid, NULL, workqueue_thread, workqueue);
        if (ret) {
                urcu_die(ret);
        }
+
+       ret = pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
+       urcu_posix_assert(!ret);
 }