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/*
*
* Copyright 2015-2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#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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