86 lines
1.6 KiB
C
86 lines
1.6 KiB
C
/*
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* gccmain.c
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*
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* A separate version of __main, __do_global_ctors and __do_global_dtors for
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* Mingw32 for use with Cygwin32 b19. Hopefully this object file will only
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* be linked if the libgcc.a doesn't include __main, __do_global_dtors and
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* __do_global_ctors.
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*
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* This file is part of the Mingw32 package.
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*
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* Contributors:
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* Code supplied by Stan Cox <scox@cygnus.com>
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*
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* $Revision$
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* $Author$
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* $Date$
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*
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*/
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/* Needed for the atexit prototype. */
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#include <stdlib.h>
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typedef void (*func_ptr) (void);
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extern func_ptr __CTOR_LIST__[];
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extern func_ptr __DTOR_LIST__[];
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void
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__do_global_dtors (void)
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{
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static func_ptr *p = __DTOR_LIST__ + 1;
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/*
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* Call each destructor in the destructor list until a null pointer
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* is encountered.
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*/
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while (*p)
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{
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(*(p)) ();
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p++;
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}
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}
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void
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__do_global_ctors (void)
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{
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unsigned long nptrs = (unsigned long) __CTOR_LIST__[0];
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unsigned i;
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/*
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* If the first entry in the constructor list is -1 then the list
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* is terminated with a null entry. Otherwise the first entry was
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* the number of pointers in the list.
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*/
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if (nptrs == -1)
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{
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for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++)
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;
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}
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/*
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* Go through the list backwards calling constructors.
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*/
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for (i = nptrs; i >= 1; i--)
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{
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__CTOR_LIST__[i] ();
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}
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/*
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* Register the destructors for processing on exit.
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*/
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atexit (__do_global_dtors);
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}
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static int initialized = 0;
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void
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__main (void)
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{
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if (!initialized)
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{
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initialized = 1;
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__do_global_ctors ();
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}
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}
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