67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2012.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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assert.h
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Verify program assertion.
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*******************************************************************************/
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#ifndef _ASSERT_H
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#define _ASSERT_H 1
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#include <features.h>
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/* stdlib.h is not needed, but GCC fixincludes thinks it is, so fool it. */
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#if 0
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#include <stdlib.h>
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#endif
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__BEGIN_DECLS
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/* The actual implementation of assert. */
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void _assert(const char* filename, unsigned int line, const char* functionname,
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const char* expression) __attribute__ ((noreturn));
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__END_DECLS
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#endif
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/* Rid ourselves of any previous declaration of assert. */
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#ifdef assert
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#undef assert
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#endif
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/* Redefine the assert macro on each <assert.h> inclusion. */
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#ifdef NDEBUG
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#define assert(ignore) ((void) 0)
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#else /* !NDEBUG */
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/* Use __builtin_expect to tell the compiler that we don't expect a failure to
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happen and thus it can do better branch prediction. Naturally we don't
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optimize for the case where the program is about to abort(). */
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#define assert(invariant) \
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if ( __builtin_expect(!(invariant), 0) ) \
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{ \
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_assert(__FILE__, __LINE__, __PRETTY_FUNCTION__, #invariant); \
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}
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#endif /* !NDEBUG */
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