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| author | Ulrich Drepper <drepper@redhat.com> | 2003-08-12 03:41:23 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2003-08-12 03:41:23 +0000 |
| commit | ca91553a6fc4c3689bf22c562af41f45566d8a77 (patch) | |
| tree | 0348da7916cd7b85e6c2407d712907b6e82c19f0 /assert | |
| parent | 334fcf2a65f3b58867ce136da767c6c58a3d45ed (diff) | |
| download | glibc-ca91553a6fc4c3689bf22c562af41f45566d8a77.tar.gz | |
Update.
2003-08-11 Ulrich Drepper <drepper@redhat.com>
* assert/assert.h: Use __builtin_expect in assert and
assert_perror definitions if possible.
Diffstat (limited to 'assert')
| -rw-r--r-- | assert/assert.h | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/assert/assert.h b/assert/assert.h index 89e28b5453..9908d4176a 100644 --- a/assert/assert.h +++ b/assert/assert.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1991,1992,1994-1999,2000,2001 Free Software Foundation, Inc. +/* Copyright (C) 1991,1992,1994-2001,2003 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -84,16 +84,33 @@ extern void __assert (const char *__assertion, const char *__file, int __line) __END_DECLS -# define assert(expr) \ +/* For the macro definition we use gcc's __builtin_expect if possible + to generate good code for the non-error case. gcc 3.0 is a good + enough estimate for when the feature became available. */ +# if __GNUC_PREREQ (3, 0) +# define assert(expr) \ + (__ASSERT_VOID_CAST (__builtin_expect (expr, 1) ? 0 : \ + (__assert_fail (__STRING(expr), __FILE__, __LINE__, \ + __ASSERT_FUNCTION), 0))) +# else +# define assert(expr) \ (__ASSERT_VOID_CAST ((expr) ? 0 : \ (__assert_fail (__STRING(expr), __FILE__, __LINE__, \ __ASSERT_FUNCTION), 0))) +# endif # ifdef __USE_GNU -# define assert_perror(errnum) \ +# if __GNUC_PREREQ (3, 0) +# define assert_perror(errnum) \ (__ASSERT_VOID_CAST (!(errnum) ? 0 : \ (__assert_perror_fail ((errnum), __FILE__, __LINE__, \ __ASSERT_FUNCTION), 0))) +# else +# define assert_perror(errnum) \ + (__ASSERT_VOID_CAST (__builtin_expect (!(errnum), 1) ? 0 : \ + (__assert_perror_fail ((errnum), __FILE__, __LINE__, \ + __ASSERT_FUNCTION), 0))) +# endif # endif /* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__' |