X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fhashtable%2Fhashtable.c;h=4fb19cffda923bf1f19062be891f6180f0e48c14;hb=0c82ac624169ec9ec062f395e55abfe992d0fd91;hp=55346b903bb5a465e23d07d4037f174ea00e9ce1;hpb=d604af56012530c73c1f1b1fbe6156555febe386;p=lttng-tools.git

diff --git a/src/common/hashtable/hashtable.c b/src/common/hashtable/hashtable.c
index 55346b903..4fb19cffd 100644
--- a/src/common/hashtable/hashtable.c
+++ b/src/common/hashtable/hashtable.c
@@ -15,7 +15,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
 #define _LGPL_SOURCE
 #include <assert.h>
 #include <string.h>
@@ -28,6 +27,9 @@
 #include "hashtable.h"
 #include "utils.h"
 
+/* seed_lock protects both seed_init and lttng_ht_seed. */
+static pthread_mutex_t seed_lock = PTHREAD_MUTEX_INITIALIZER;
+static bool seed_init;
 unsigned long lttng_ht_seed;
 
 static unsigned long min_hash_alloc_size = 1;
@@ -96,6 +98,13 @@ struct lttng_ht *lttng_ht_new(unsigned long size, int type)
 	if (!size)
 		size = DEFAULT_HT_SIZE;
 
+	pthread_mutex_lock(&seed_lock);
+	if (!seed_init) {
+		lttng_ht_seed = (unsigned long) time(NULL);
+		seed_init = true;
+	}
+	pthread_mutex_unlock(&seed_lock);
+
 	ht = zmalloc(sizeof(*ht));
 	if (ht == NULL) {
 		PERROR("zmalloc lttng_ht");
@@ -579,12 +588,3 @@ struct lttng_ht_node_two_u64 *lttng_ht_iter_get_node_two_u64(
 	}
 	return caa_container_of(node, struct lttng_ht_node_two_u64, node);
 }
-
-/*
- * lib constructor
- */
-static void __attribute__((constructor)) _init(void)
-{
-	/* Init hash table seed */
-	lttng_ht_seed = (unsigned long) time(NULL);
-}