mirror of
https://github.com/UzixLS/KernelEx.git
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106 lines
1.8 KiB
C
106 lines
1.8 KiB
C
#include <stdlib.h>
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#include "init.h"
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#define MAX_ATEXIT 32
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typedef void (__cdecl *_PVFV)(void);
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static _PVFV _atexitlist[MAX_ATEXIT];
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static int _atexitlist_cnt;
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extern _PVFV __CTOR_LIST__[];
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extern _PVFV __DTOR_LIST__[];
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extern void _pei386_runtime_relocator (void);
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int atexit(_PVFV func)
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{
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if (_atexitlist_cnt < MAX_ATEXIT)
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{
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_atexitlist[_atexitlist_cnt++] = func;
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return 0;
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}
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return -1;
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}
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void
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__do_global_dtors (void)
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{
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static _PVFV *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 __init(void)
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{
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_pei386_runtime_relocator();
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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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static int exited = 0;
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void __exit(void)
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{
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if (exited)
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return;
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exited = 1;
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if (_atexitlist_cnt)
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{
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_PVFV* p;
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for (p = _atexitlist + _atexitlist_cnt - 1 ; p >= _atexitlist ; p--)
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{
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if (*p != NULL)
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(**p)();
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p--;
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}
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}
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}
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