X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fhashtable%2Fhashtable.c;h=78175ca6d508d24b2ffd4fa29a82ce8fba3633ff;hb=fb9a95c4d6242bd8336b638c90a7d8f846125659;hp=5b861c8004d04e4f125e2c294cc980f42e0869d6;hpb=890d8fe47755c3bad936389cf48ffa141cff41c9;p=lttng-tools.git

diff --git a/src/common/hashtable/hashtable.c b/src/common/hashtable/hashtable.c
index 5b861c800..78175ca6d 100644
--- a/src/common/hashtable/hashtable.c
+++ b/src/common/hashtable/hashtable.c
@@ -27,6 +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;
@@ -95,6 +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");
@@ -249,7 +259,7 @@ void lttng_ht_node_free_two_u64(struct lttng_ht_node_two_u64 *node)
  * Lookup function in hashtable.
  */
 LTTNG_HIDDEN
-void lttng_ht_lookup(struct lttng_ht *ht, void *key,
+void lttng_ht_lookup(struct lttng_ht *ht, const void *key,
 		struct lttng_ht_iter *iter)
 {
 	assert(ht);
@@ -578,12 +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);
-}