Use PTHREAD_NULL if the platform has it.

Spotted by: Rasmus Villemoes

Use PTHREAD_NULL if the platform has it.
Spotted by: Rasmus Villemoes
0dd8b32b · Poul-Henning Kamp · 6cbd4c85 · 0dd8b32b
Commit 0dd8b32b authored Feb 22, 2021 by Poul-Henning Kamp
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cache_lck.c bin/varnishd/cache/cache_lck.c +4 -0

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--- a/bin/varnishd/cache/cache_lck.c
+++ b/bin/varnishd/cache/cache_lck.c
@@ -154,7 +154,11 @@ Lck__Unlock(struct lock *lck, const char *p, int l)
 	 * implementations of pthread.
 	 * #endif
 	 */
+#ifdef PTHREAD_NULL
+	ilck->owner = PTHREAD_NULL;
+#else
 	memset(&ilck->owner, 0, sizeof ilck->owner);
+#endif
 	AZ(pthread_mutex_unlock(&ilck->mtx));
 	if (DO_DEBUG(DBG_WITNESS))
 		Lck_Witness_Unlock(ilck);