Few small changes for semaphore.c and util.h.

Add a ZERO_PTR() macro in util.h.
semaphore_destroy() will now ignore NULL pointers.

2 files changed, 6 insertions, 3 deletions

diff --git a/semaphore.c b/semaphore.c
index 1f43652..33ae9f8 100644
--- a/semaphore.c
+++ b/semaphore.c
@@ -63,10 +63,11 @@ semaphore_init(semaphore_t *sem, int value)
 void
 semaphore_destroy(semaphore_t *sem)
 {
-	REQUIRE(sem != NULL);
+	if (sem == NULL)
+		return;
 
-	REQUIRE(isc_mutex_destroy(&sem->mutex) == ISC_R_SUCCESS);
-	REQUIRE(isc_condition_destroy(&sem->cond) == ISC_R_SUCCESS);
+	RUNTIME_CHECK(isc_mutex_destroy(&sem->mutex) == ISC_R_SUCCESS);
+	RUNTIME_CHECK(isc_condition_destroy(&sem->cond) == ISC_R_SUCCESS);
 }
 
 /*
diff --git a/util.h b/util.h
index 470d3fd..28e42ba 100644
--- a/util.h
+++ b/util.h
@@ -25,4 +25,6 @@
 		if (result != ISC_R_SUCCESS) goto cleanup;	\
 	} while (0)
 
+#define ZERO_PTR(ptr, type) memset((ptr), 0, sizeof(type))
+
 #endif /* !_LD_UTIL_H_ */