banan-os/userspace/libraries/LibC/icxxabi.cpp

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#include <BAN/Assert.h>
#include <stdint.h>
#include <stddef.h>
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#define ATEXIT_MAX_FUNCS 128
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struct atexit_func_entry_t
{
void(*func)(void*);
void* arg;
void* dso_handle;
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};
static atexit_func_entry_t __atexit_funcs[ATEXIT_MAX_FUNCS];
static size_t __atexit_func_count = 0;
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extern "C" int __cxa_atexit(void(*func)(void*), void* arg, void* dso_handle)
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{
if (__atexit_func_count >= ATEXIT_MAX_FUNCS)
return -1;
auto& atexit_func = __atexit_funcs[__atexit_func_count++];
atexit_func.func = func;
atexit_func.arg = arg;
atexit_func.dso_handle = dso_handle;
return 0;
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};
extern "C" void __cxa_finalize(void* f)
{
for (size_t i = __atexit_func_count; i > 0; i--)
{
auto& atexit_func = __atexit_funcs[i - 1];
if (atexit_func.func == nullptr)
continue;
if (f == nullptr || f == atexit_func.func)
{
atexit_func.func(atexit_func.arg);
atexit_func.func = nullptr;
}
}
};