summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorMatthias Schiffer <mschiffer@universe-factory.net>2014-08-02 06:55:13 +0200
committerMatthias Schiffer <mschiffer@universe-factory.net>2014-08-02 06:55:13 +0200
commitc800a400b04b9ba25773f26e402a734a2ef3fe83 (patch)
tree7330351988f0269922b9130d6412733ba2fe8208
parent4f25bdd2590f65586931ec71f798a91443e13674 (diff)
downloadfastd-c800a400b04b9ba25773f26e402a734a2ef3fe83.tar
fastd-c800a400b04b9ba25773f26e402a734a2ef3fe83.zip
Add MacOS X semaphore implementation
-rw-r--r--src/sem.h32
1 files changed, 31 insertions, 1 deletions
diff --git a/src/sem.h b/src/sem.h
index f0b7183..d557f22 100644
--- a/src/sem.h
+++ b/src/sem.h
@@ -34,8 +34,36 @@
#include "log.h"
-#include <semaphore.h>
+#ifdef __APPLE__
+
+#include <dispatch/dispatch.h>
+
+/** Generic semaphore type */
+typedef dispatch_semaphore_t fastd_sem_t;
+
+
+/** Initializes a semaphore with a given value */
+static inline void fastd_sem_init(fastd_sem_t *sem, unsigned value) {
+ *sem = dispatch_semaphore_create(value);
+ if (!*sem)
+ exit_errno("dispatch_semaphore_create");
+}
+
+/** Increments the semaphore */
+static inline void fastd_sem_post(fastd_sem_t *sem) {
+ if (dispatch_semaphore_signal(*sem))
+ exit_errno("sem_post");
+}
+
+/** Tries to decrement the semaphore */
+static inline bool fastd_sem_trywait(fastd_sem_t *sem) {
+ return !dispatch_semaphore_wait(*sem, DISPATCH_TIME_NOW);
+}
+
+#else
+
+#include <semaphore.h>
/** Generic semaphore type */
typedef sem_t fastd_sem_t;
@@ -57,3 +85,5 @@ static inline void fastd_sem_post(fastd_sem_t *sem) {
static inline bool fastd_sem_trywait(fastd_sem_t *sem) {
return !sem_trywait(sem);
}
+
+#endif