src/utils_ovs.c: Don't set pthread_t to -1, use pthread_equal() to compare.

The assumption that pthread_t is a scalar is not portable.

diff --git a/src/utils_ovs.c b/src/utils_ovs.c
index 63cb94c..e9e841e 100644 (file)
--- a/src/utils_ovs.c
+++ b/src/utils_ovs.c
@@ -902,7 +902,7 @@ static void *ovs_event_worker(void *arg) {
 
 /* Initialize EVENT thread */
 static int ovs_db_event_thread_init(ovs_db_t *pdb) {
-  pdb->event_thread.tid = (pthread_t)-1;
+  pdb->event_thread.tid = (pthread_t){0};
   /* init event thread condition variable */
   if (pthread_cond_init(&pdb->event_thread.cond, NULL)) {
     return -1;
@@ -936,9 +936,10 @@ static int ovs_db_event_thread_init(ovs_db_t *pdb) {
 
 /* Destroy EVENT thread */
 static int ovs_db_event_thread_destroy(ovs_db_t *pdb) {
-  if (pdb->event_thread.tid == (pthread_t)-1)
+  if (pthread_equal(pdb->event_thread.tid, (pthread_t){0})) {
     /* already destroyed */
     return 0;
+  }
   ovs_db_event_post(pdb, OVS_DB_EVENT_TERMINATE);
   if (pthread_join(pdb->event_thread.tid, NULL) != 0)
     return -1;
@@ -949,13 +950,13 @@ static int ovs_db_event_thread_destroy(ovs_db_t *pdb) {
   pthread_mutex_unlock(&pdb->event_thread.mutex);
   pthread_mutex_destroy(&pdb->event_thread.mutex);
   pthread_cond_destroy(&pdb->event_thread.cond);
-  pdb->event_thread.tid = (pthread_t)-1;
+  pdb->event_thread.tid = (pthread_t){0};
   return 0;
 }
 
 /* Initialize POLL thread */
 static int ovs_db_poll_thread_init(ovs_db_t *pdb) {
-  pdb->poll_thread.tid = (pthread_t)-1;
+  pdb->poll_thread.tid = (pthread_t){0};
   /* init event thread mutex */
   if (pthread_mutex_init(&pdb->poll_thread.mutex, NULL)) {
     return -1;
@@ -974,9 +975,10 @@ static int ovs_db_poll_thread_init(ovs_db_t *pdb) {
 
 /* Destroy POLL thread */
 static int ovs_db_poll_thread_destroy(ovs_db_t *pdb) {
-  if (pdb->poll_thread.tid == (pthread_t)-1)
+  if (pthread_equal(pdb->poll_thread.tid, (pthread_t){0})) {
     /* already destroyed */
     return 0;
+  }
   /* change thread state */
   pthread_mutex_lock(&pdb->poll_thread.mutex);
   pdb->poll_thread.state = OVS_DB_POLL_STATE_EXITING;
@@ -985,7 +987,7 @@ static int ovs_db_poll_thread_destroy(ovs_db_t *pdb) {
   if (pthread_join(pdb->poll_thread.tid, NULL) != 0)
     return -1;
   pthread_mutex_destroy(&pdb->poll_thread.mutex);
-  pdb->poll_thread.tid = (pthread_t)-1;
+  pdb->poll_thread.tid = (pthread_t){0};
   return 0;
 }