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[libc++abi] NFC: Move AtomicInt to cxa_guard_impl.h

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Since the atomic_support.h header of libc++abi is considered technical
debt (since we should use libc++'s), it's better not to add new
definitions to it, which makes it diverge from the original libc++
header even more.

Differential Revision: https://reviews.llvm.org/D75950
This commit is contained in:
Louis Dionne 2020-03-10 13:44:33 -04:00
parent 246398ece7
commit b0f1a4e7df
2 changed files with 26 additions and 30 deletions
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26
libcxxabi/src/cxa_guard_impl.h
View file

@ -108,6 +108,32 @@ struct LazyValue {
bool is_init = false;
};
template <class IntType>
class AtomicInt {
public:
using MemoryOrder = std::__libcpp_atomic_order;
explicit AtomicInt(IntType *b) : b(b) {}
AtomicInt(AtomicInt const&) = delete;
AtomicInt& operator=(AtomicInt const&) = delete;
IntType load(MemoryOrder ord) {
return std::__libcpp_atomic_load(b, ord);
}
void store(IntType val, MemoryOrder ord) {
std::__libcpp_atomic_store(b, val, ord);
}
IntType exchange(IntType new_val, MemoryOrder ord) {
return std::__libcpp_atomic_exchange(b, new_val, ord);
}
bool compare_exchange(IntType *expected, IntType desired, MemoryOrder ord_success, MemoryOrder ord_failure) {
return std::__libcpp_atomic_compare_exchange(b, expected, desired, ord_success, ord_failure);
}
private:
IntType *b;
};
//===----------------------------------------------------------------------===//
// PlatformGetThreadID
//===----------------------------------------------------------------------===//

30
libcxxabi/src/include/atomic_support.h
View file

@ -177,34 +177,4 @@ bool __libcpp_atomic_compare_exchange(_ValueType* __val,
_LIBCPP_END_NAMESPACE_STD
namespace {
template <class IntType>
class AtomicInt {
public:
using MemoryOrder = std::__libcpp_atomic_order;
explicit AtomicInt(IntType *b) : b(b) {}
AtomicInt(AtomicInt const&) = delete;
AtomicInt& operator=(AtomicInt const&) = delete;
IntType load(MemoryOrder ord) {
return std::__libcpp_atomic_load(b, ord);
}
void store(IntType val, MemoryOrder ord) {
std::__libcpp_atomic_store(b, val, ord);
}
IntType exchange(IntType new_val, MemoryOrder ord) {
return std::__libcpp_atomic_exchange(b, new_val, ord);
}
bool compare_exchange(IntType *expected, IntType desired, MemoryOrder ord_success, MemoryOrder ord_failure) {
return std::__libcpp_atomic_compare_exchange(b, expected, desired, ord_success, ord_failure);
}
private:
IntType *b;
};
} // end namespace
#endif // ATOMIC_SUPPORT_H