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LibC: Implement basic atexit. This allows clean exit from doom (soon)

This commit is contained in:
Bananymous 2024-01-03 00:30:37 +02:00
parent 753de3d9f0
commit db0650cf10
1 changed files with 13 additions and 2 deletions
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15
libc/stdlib.cpp
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@ -13,6 +13,9 @@ extern "C" char** environ;
extern "C" void _fini(); extern "C" void _fini();
static void (*at_exit_funcs[64])();
static uint32_t at_exit_funcs_count = 0;
void abort(void) void abort(void)
{ {
fflush(nullptr); fflush(nullptr);
@ -22,6 +25,8 @@ void abort(void)
void exit(int status) void exit(int status)
{ {
for (uint32_t i = at_exit_funcs_count; i > 0; i--)
at_exit_funcs[i - 1]();
fflush(nullptr); fflush(nullptr);
__cxa_finalize(nullptr); __cxa_finalize(nullptr);
_fini(); _fini();
@ -34,9 +39,15 @@ int abs(int val)
return val < 0 ? -val : val; return val < 0 ? -val : val;
} }
int atexit(void(*)(void)) int atexit(void (*func)(void))
{ {
return -1; if (at_exit_funcs_count > sizeof(at_exit_funcs) / sizeof(*at_exit_funcs))
{
errno = ENOBUFS;
return -1;
}
at_exit_funcs[at_exit_funcs_count++] = func;
return 0;
} }
int atoi(const char* str) int atoi(const char* str)