mirror of git://git.psyced.org/git/psyclpc
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
#ifndef MY_ALLOCA_H__
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#define MY_ALLOCA_H__
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/*------------------------------------------------------------------
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* Portable definition of alloca().
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*
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* Use this file instead of the normal <alloca.h>.
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*
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* If you have a function making heavy use of alloca(), it is a good
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* idea to use GC_ALLOCA in the calling function after the call.
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* This macro takes care that for the C-version of alloca the memory
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* usage is kept in limits.
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*------------------------------------------------------------------
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*/
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#include "driver.h"
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#if !defined(C_ALLOCA) || defined(MAKE_FUNC)
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#ifdef HAVE_ALLOCA_H
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# include <alloca.h>
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#else /* !HAVE_ALLOCA_H */
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# ifdef __GNUC__
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# ifndef alloca
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# define alloca(size) __builtin_alloca(size)
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# endif
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# else /* !__GNUC__ */
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# ifdef _AIX
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# pragma alloca
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# endif /* _AIX */
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# endif /* !__GNUC__ */
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#endif /* !HAVE_ALLOCA_H */
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#define GC_ALLOCA NOOP
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#else /* defined(C_ALLOCA) && !defined(MAKE_FUNC) */
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#include <sys/types.h>
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#ifdef alloca
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# undef alloca
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#endif
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extern void * alloca(size_t);
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#define GC_ALLOCA alloca(0)
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#endif /* C_ALLOCA */
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#endif /* MY_ALLOCA_H__ */
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