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LibC: Implement C++ static guards

This commit is contained in:
Bananymous 2024-07-30 12:02:05 +03:00
parent f0be4f86a6
commit 62db9a8ef3
1 changed files with 23 additions and 0 deletions
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23
userspace/libraries/LibC/icxxabi.cpp
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@ -39,3 +39,26 @@ extern "C" void __cxa_finalize(void* f)
}
}
};
namespace __cxxabiv1
{
using __guard = uint64_t;
extern "C" int __cxa_guard_acquire (__guard* g)
{
uint8_t* byte = reinterpret_cast<uint8_t*>(g);
uint8_t zero = 0;
return __atomic_compare_exchange_n(byte, &zero, 1, false, __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
}
extern "C" void __cxa_guard_release (__guard* g)
{
uint8_t* byte = reinterpret_cast<uint8_t*>(g);
__atomic_store_n(byte, 0, __ATOMIC_RELEASE);
}
extern "C" void __cxa_guard_abort (__guard*)
{
ASSERT_NOT_REACHED();
}
}