Function atomic_exchange_ptr

3rd/mimalloc-2.0.9/test/test-stress.c:303–309

}

static void* atomic_exchange_ptr(volatile void** p, void* newval) {
#if (INTPTR_MAX == INT32_MAX)
  return (void*)InterlockedExchange((volatile LONG*)p, (LONG)newval);
#else
  return (void*)InterlockedExchange64((volatile LONG64*)p, (LONG64)newval);
#endif
}
#else

#include <pthread.h>