headers/posix/assert.h

   1 /*
   2  * Copyright 2004-2015 Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 /* Include guards are only on part of the file, as assert.h is required
   7    to support being included multiple times.
   8
   9    E.g. the following is required to be valid:
  10
  11    #undef NDEBUG
  12    #include <assert.h>
  13
  14    assert(0); // this assertion will be triggered
  15
  16    #define NDEBUG
  17    #include <assert.h>
  18
  19    assert(0); // this assertion will not be triggered
  20 */
  21
  22 #undef assert
  23
  24 #ifndef NDEBUG
  25         /* defining NDEBUG disables assert() functionality */
  26
  27 #ifndef _ASSERT_H_
  28 #define _ASSERT_H_
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 extern void __assert_fail(const char *assertion, const char *file,
  35                                 unsigned int line, const char *function)
  36         __attribute__ ((noreturn));
  37
  38 extern void __assert_perror_fail(int error, const char *file,
  39                                 unsigned int line, const char *function)
  40         __attribute__ ((noreturn));
  41
  42 #ifdef __cplusplus
  43 }
  44 #endif
  45
  46 #endif /* !_ASSERT_H_ */
  47
  48 #define assert(assertion) \
  49         ((assertion) ? (void)0 : __assert_fail(#assertion, __FILE__, __LINE__, __PRETTY_FUNCTION__))
  50
  51 #else   /* NDEBUG */
  52 #       define assert(condition) ((void)0)
  53 #endif