63 lines
1.3 KiB
C++
63 lines
1.3 KiB
C++
#include <kernel/Panic.h>
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#define ATEXIT_MAX_FUNCS 128
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struct atexit_func_entry_t
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{
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void(*func)(void*);
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void* arg;
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void* dso_handle;
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};
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static atexit_func_entry_t __atexit_funcs[ATEXIT_MAX_FUNCS];
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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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{
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if (__atexit_func_count >= ATEXIT_MAX_FUNCS)
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return -1;
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auto& atexit_func = __atexit_funcs[__atexit_func_count++];
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atexit_func.func = func;
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atexit_func.arg = arg;
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atexit_func.dso_handle = dso_handle;
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return 0;
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};
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extern "C" void __cxa_finalize(void* f)
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{
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for (size_t i = __atexit_func_count; i > 0; i--)
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{
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auto& atexit_func = __atexit_funcs[i - 1];
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if (atexit_func.func == nullptr)
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continue;
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if (f == nullptr || f == atexit_func.func)
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{
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atexit_func.func(atexit_func.arg);
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atexit_func.func = nullptr;
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}
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}
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};
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namespace __cxxabiv1
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{
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using __guard = uint64_t;
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extern "C" int __cxa_guard_acquire (__guard* g)
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{
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uint8_t* byte = reinterpret_cast<uint8_t*>(g);
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uint8_t zero = 0;
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return __atomic_compare_exchange_n(byte, &zero, 1, false, __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
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}
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extern "C" void __cxa_guard_release (__guard* g)
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{
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uint8_t* byte = reinterpret_cast<uint8_t*>(g);
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__atomic_store_n(byte, 0, __ATOMIC_RELEASE);
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}
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extern "C" void __cxa_guard_abort (__guard*)
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{
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Kernel::panic("__cxa_guard_abort");
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}
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}
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