feat(lock): add basic lock functions

bc/lock/Atomic.cpp

@@ -0,0 +1,13 @@
+#include "bc/lock/Atomic.hpp"
+
+#if defined(WHOA_SYSTEM_WIN)
+#include <windows.h>
+#endif
+
+int32_t Blizzard::Lock::Atomic::Increment(volatile int32_t* value) {
+#if defined(WHOA_SYSTEM_WIN)
+    return InterlockedIncrement(reinterpret_cast<volatile long*>(value));
+#elif defined(WHOA_SYSTEM_MAC) || defined(WHOA_SYSTEM_LINUX)
+    return __sync_fetch_and_add(value, 1) + 1;
+#endif
+}

bc/lock/Atomic.hpp

@@ -0,0 +1,16 @@
+#ifndef BC_LOCK_ATOMIC_HPP
+#define BC_LOCK_ATOMIC_HPP
+
+#include <cstdint>
+
+namespace Blizzard {
+namespace Lock {
+namespace Atomic {
+
+int32_t Increment(volatile int32_t* value);
+
+} // namespace Atomic
+} // namespace Lock
+} // namespace Blizzard
+
+#endif