X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Fkernel%2Fao_mutex.c;h=a36fe93940906efdefaa37e616e0fa762f9daa88;hp=952ff46214a69db9b3e293992ee4f2e602576f46;hb=292cb8380b478542555b5f370e8252eafa2f74ac;hpb=e0ee2ac6bc68b73e13bf34fac3ffd4a3b79dce98

diff --git a/src/kernel/ao_mutex.c b/src/kernel/ao_mutex.c
index 952ff462..a36fe939 100644
--- a/src/kernel/ao_mutex.c
+++ b/src/kernel/ao_mutex.c
@@ -17,6 +17,29 @@
 
 #include "ao.h"
 
+#ifndef HAS_MUTEX_TRY
+#define HAS_MUTEX_TRY 1
+#endif
+
+#if HAS_MUTEX_TRY
+
+uint8_t
+ao_mutex_try(__xdata uint8_t *mutex, uint8_t task_id) __reentrant
+{
+	uint8_t	ret;
+	if (*mutex == task_id)
+		ao_panic(AO_PANIC_MUTEX);
+	ao_arch_critical(
+		if (*mutex)
+			ret = 0;
+		else {
+			*mutex = task_id;
+			ret = 1;
+		});
+	return ret;
+}
+#endif
+
 void
 ao_mutex_get(__xdata uint8_t *mutex) __reentrant
 {