1 // 2 // 3 // Copyright 2015 gRPC authors. 4 // 5 // Licensed under the Apache License, Version 2.0 (the "License"); 6 // you may not use this file except in compliance with the License. 7 // You may obtain a copy of the License at 8 // 9 // http://www.apache.org/licenses/LICENSE-2.0 10 // 11 // Unless required by applicable law or agreed to in writing, software 12 // distributed under the License is distributed on an "AS IS" BASIS, 13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 // See the License for the specific language governing permissions and 15 // limitations under the License. 16 // 17 // 18 19 #ifndef GRPC_SRC_CORE_LIB_SURFACE_API_TRACE_H 20 #define GRPC_SRC_CORE_LIB_SURFACE_API_TRACE_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include <grpc/support/log.h> 25 26 #include "src/core/lib/debug/trace.h" 27 28 extern grpc_core::TraceFlag grpc_api_trace; 29 30 // Provide unwrapping macros because we're in C89 and variadic macros weren't 31 // introduced until C99... 32 #define GRPC_API_TRACE_UNWRAP0() 33 #define GRPC_API_TRACE_UNWRAP1(a) , a 34 #define GRPC_API_TRACE_UNWRAP2(a, b) , a, b 35 #define GRPC_API_TRACE_UNWRAP3(a, b, c) , a, b, c 36 #define GRPC_API_TRACE_UNWRAP4(a, b, c, d) , a, b, c, d 37 #define GRPC_API_TRACE_UNWRAP5(a, b, c, d, e) , a, b, c, d, e 38 #define GRPC_API_TRACE_UNWRAP6(a, b, c, d, e, f) , a, b, c, d, e, f 39 #define GRPC_API_TRACE_UNWRAP7(a, b, c, d, e, f, g) , a, b, c, d, e, f, g 40 #define GRPC_API_TRACE_UNWRAP8(a, b, c, d, e, f, g, h) , a, b, c, d, e, f, g, h 41 #define GRPC_API_TRACE_UNWRAP9(a, b, c, d, e, f, g, h, i) \ 42 , a, b, c, d, e, f, g, h, i 43 #define GRPC_API_TRACE_UNWRAP10(a, b, c, d, e, f, g, h, i, j) \ 44 , a, b, c, d, e, f, g, h, i, j 45 46 // Due to the limitations of C89's preprocessor, the arity of the var-arg list 47 // 'nargs' must be specified. 48 #define GRPC_API_TRACE(fmt, nargs, args) \ 49 if (GRPC_TRACE_FLAG_ENABLED(grpc_api_trace)) { \ 50 gpr_log(GPR_INFO, fmt GRPC_API_TRACE_UNWRAP##nargs args); \ 51 } 52 53 #endif // GRPC_SRC_CORE_LIB_SURFACE_API_TRACE_H 54