[libc++] Refactor the configuration macros to being always defined (#112094)
This is a follow-up to #89178. This updates the `<__config_site>`
macros.
diff --git a/libcxx/src/memory.cpp b/libcxx/src/memory.cpp
index 7a1c283..16190c2 100644
--- a/libcxx/src/memory.cpp
+++ b/libcxx/src/memory.cpp
@@ -13,7 +13,7 @@
#include <memory>
-#ifndef _LIBCPP_HAS_NO_THREADS
+#if _LIBCPP_HAS_THREADS
# include <mutex>
# include <thread>
# if defined(__ELF__) && defined(_LIBCPP_LINK_PTHREAD_LIB)
@@ -96,7 +96,7 @@
const void* __shared_weak_count::__get_deleter(const type_info&) const noexcept { return nullptr; }
-#if !defined(_LIBCPP_HAS_NO_THREADS)
+#if _LIBCPP_HAS_THREADS
static constexpr std::size_t __sp_mut_count = 32;
static constinit __libcpp_mutex_t mut_back[__sp_mut_count] = {
@@ -128,7 +128,7 @@
return muts[hash<const void*>()(p) & (__sp_mut_count - 1)];
}
-#endif // !defined(_LIBCPP_HAS_NO_THREADS)
+#endif // _LIBCPP_HAS_THREADS
void* align(size_t alignment, size_t size, void*& ptr, size_t& space) {
void* r = nullptr;
