utils: Add ast_assert_return

Similar to pjproject's PJ_ASSERT_RETURN macro, this one will do the
following...

If the assert passes... NoOp

If the assert fails and AST_DEVMODE is defined, execute ast_assert()
then, if DO_CRASH isn't set, return from the calling function with
the supplied value.

If the assert fails and AST_DEVMODE is not defined, return from the
calling function with the supplied value.

The macro will execute a return without a value if one isn't suppled.

Change-Id: I0003844affeab550d5ff5bca7aa7cf8a559b873e

diff --git a/include/asterisk/utils.h b/include/asterisk/utils.h
index 290f7a30e3fade7178680866f290f2d2e4e26164..f8f761d39ffd5de39a7798100f90fcbc754bc80f 100644 (file)
--- a/include/asterisk/utils.h
+++ b/include/asterisk/utils.h
@@ -860,6 +860,13 @@ void DO_CRASH_NORETURN __ast_assert_failed(int condition, const char *condition_
 
 #ifdef AST_DEVMODE
 #define ast_assert(a) _ast_assert(a, # a, __FILE__, __LINE__, __PRETTY_FUNCTION__)
+#define ast_assert_return(a, ...) \
+({ \
+       if (__builtin_expect(!(a), 1)) { \
+               _ast_assert(0, # a, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
+               return __VA_ARGS__; \
+       }\
+})
 static void force_inline _ast_assert(int condition, const char *condition_str, const char *file, int line, const char *function)
 {
        if (__builtin_expect(!condition, 1)) {
@@ -868,6 +875,12 @@ static void force_inline _ast_assert(int condition, const char *condition_str, c
 }
 #else
 #define ast_assert(a)
+#define ast_assert_return(a, ...) \
+({ \
+       if (__builtin_expect(!(a), 1)) { \
+               return __VA_ARGS__; \
+       }\
+})
 #endif
 
 /*!