init

1 files changed, 20 insertions, 0 deletions

diff --git a/defer.h b/defer.h
new file mode 100644
index 0000000..91e45a2
--- /dev/null
+++ b/defer.h
@@ -0,0 +1,20 @@
+#ifndef __DEFER_H__
+#define __DEFER_H__
+
+#ifndef __unused
+#define __unused	__attribute__((unused))
+#endif
+
+#define __cleanup(f)	__attribute__((cleanup(f)))
+
+#define CAT(a, b)	CAT_(a, b)
+#define CAT_(a, b)	a ## b
+
+#define UNIQ(name)	CAT(name, __LINE__)
+
+#define defer						\
+    auto void UNIQ(defer_func)(int *);			\
+    int UNIQ(defer_var) __cleanup(UNIQ(defer_func));	\
+    void UNIQ(defer_func)(int *__arg __unused)
+
+#endif