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/*
*
* Copyright 2015 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef GRPC_SUPPORT_TLS_GCC_H
#define GRPC_SUPPORT_TLS_GCC_H
#include <stdbool.h>
#include <grpc/support/log.h>
/** Thread local storage based on gcc compiler primitives.
#include tls.h to use this - and see that file for documentation */
#ifndef NDEBUG
struct gpr_gcc_thread_local {
intptr_t value;
bool* inited;
};
#define GPR_TLS_DECL(name) \
static bool name##_inited = false; \
static __thread struct gpr_gcc_thread_local name = {0, &(name##_inited)}
#define gpr_tls_init(tls) \
do { \
GPR_ASSERT(*((tls)->inited) == false); \
*((tls)->inited) = true; \
} while (0)
/** It is allowed to call gpr_tls_init after gpr_tls_destroy is called. */
#define gpr_tls_destroy(tls) \
do { \
GPR_ASSERT(*((tls)->inited)); \
*((tls)->inited) = false; \
} while (0)
#define gpr_tls_set(tls, new_value) \
do { \
GPR_ASSERT(*((tls)->inited)); \
(tls)->value = (new_value); \
} while (0)
#define gpr_tls_get(tls) \
({ \
GPR_ASSERT(*((tls)->inited)); \
(tls)->value; \
})
#else /* NDEBUG */
struct gpr_gcc_thread_local {
intptr_t value;
};
#define GPR_TLS_DECL(name) \
static __thread struct gpr_gcc_thread_local name = {0}
#define gpr_tls_init(tls) \
do { \
} while (0)
#define gpr_tls_destroy(tls) \
do { \
} while (0)
#define gpr_tls_set(tls, new_value) (((tls)->value) = (new_value))
#define gpr_tls_get(tls) ((tls)->value)
#endif /* NDEBUG */
#endif /* GRPC_SUPPORT_TLS_GCC_H */
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