Add util_atomic_decrement function

Author: vinser52

src/utils/utils_concurrency.h

@@ -82,6 +82,8 @@ static __inline unsigned char util_mssb_index(long long value) {
     InterlockedExchange64((LONG64 volatile *)object, (LONG64)desired)
 #define util_atomic_increment(object)                                          \
     InterlockedIncrement64((LONG64 volatile *)object)
+#define util_atomic_decrement(object)                                          \
+    InterlockedDecrement64((LONG64 volatile *)object)
 #define util_fetch_and_add64(ptr, value)                                       \
     InterlockedExchangeAdd64((LONG64 *)(ptr), value)
 #else
@@ -101,6 +103,10 @@ static __inline unsigned char util_mssb_index(long long value) {
 
 #define util_atomic_increment(object)                                          \
     __atomic_add_fetch(object, 1, __ATOMIC_ACQ_REL)
+
+#define util_atomic_decrement(object)                                          \
+    __atomic_sub_fetch(object, 1, __ATOMIC_ACQ_REL)
+
 #define util_fetch_and_add64 __sync_fetch_and_add
 #endif