| /* |
| * |
| * 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 */ |