2 * Copyright (c) 2013 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include "ovs-atomic.h"
20 #include "ovs-thread.h"
22 #if OVS_ATOMIC_GCC4P_IMPL
23 static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER;
25 #define DEFINE_LOCKED_OP(TYPE, NAME, OPERATOR) \
27 locked_##TYPE##_##NAME(struct locked_##TYPE *u, TYPE##_t arg) \
31 ovs_mutex_lock(&mutex); \
32 old_value = u->value; \
33 u->value OPERATOR arg; \
34 ovs_mutex_unlock(&mutex); \
39 #define DEFINE_LOCKED_TYPE(TYPE) \
41 locked_##TYPE##_load(const struct locked_##TYPE *u) \
45 ovs_mutex_lock(&mutex); \
47 ovs_mutex_unlock(&mutex); \
53 locked_##TYPE##_store(struct locked_##TYPE *u, TYPE##_t value) \
55 ovs_mutex_lock(&mutex); \
57 ovs_mutex_unlock(&mutex); \
59 DEFINE_LOCKED_OP(TYPE, add, +=); \
60 DEFINE_LOCKED_OP(TYPE, sub, -=); \
61 DEFINE_LOCKED_OP(TYPE, or, |=); \
62 DEFINE_LOCKED_OP(TYPE, xor, ^=); \
63 DEFINE_LOCKED_OP(TYPE, and, &=)
65 DEFINE_LOCKED_TYPE(uint64);
66 DEFINE_LOCKED_TYPE(int64);
68 #endif /* OVS_ATOMIC_GCC4P_IMPL */