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-rw-r--r--sysdeps/mach/libc-lock.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/sysdeps/mach/libc-lock.h b/sysdeps/mach/libc-lock.h
index 2c39592717..ea3d306a52 100644
--- a/sysdeps/mach/libc-lock.h
+++ b/sysdeps/mach/libc-lock.h
@@ -56,5 +56,19 @@ typedef struct __libc_lock_opaque__ __libc_lock_t;
/* Unlock the named lock variable. */
#define __libc_lock_unlock(NAME) __mutex_unlock (&(NAME))
+/* Start a critical region with a cleanup function */
+#define __libc_cleanup_region_start(FCT, ARG) \
+{ \
+ (typeof FCT) __save_FCT = FCT; \
+ (typeof ARG) __save_ARG = ARG; \
+ /* close brace is in __libc_cleanup_region_end below. */
+
+/* End a critical region started with __libc_cleanup_region_start. */
+#define __libc_cleanup_region_end(DOIT) \
+ if (DOIT) \
+ (* __save_FCT)(__save_ARG); \
+}
+
+
#endif /* libc-lock.h */