1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 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 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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. 15 */ 16 17 #ifndef IDMAP2_INCLUDE_IDMAP2_SYSTRACE_H_ 18 #define IDMAP2_INCLUDE_IDMAP2_SYSTRACE_H_ 19 20 #include <sstream> 21 #include <vector> 22 23 #include "cutils/trace.h" 24 25 namespace android::idmap2::utils { 26 #ifdef __ANDROID__ 27 28 class ScopedTraceNoStart { 29 public: 30 ~ScopedTraceNoStart(); 31 }; 32 33 class ScopedTraceMessageHelper { 34 public: 35 ~ScopedTraceMessageHelper(); 36 stream()37 std::ostream& stream() { 38 return buffer_; 39 } 40 41 private: 42 std::ostringstream buffer_; 43 }; 44 45 bool atrace_enabled(); 46 47 #define SYSTRACE \ 48 android::idmap2::utils::ScopedTraceNoStart _trace##__LINE__; \ 49 android::idmap2::utils::atrace_enabled() \ 50 && android::idmap2::utils::ScopedTraceMessageHelper().stream() 51 52 #else 53 54 class DummyStream { 55 public: 56 std::ostream& stream() { 57 return buffer_; 58 } 59 60 private: 61 std::ostringstream buffer_; 62 }; 63 64 #define SYSTRACE android::idmap2::utils::DummyStream().stream() 65 66 #endif 67 } // namespace android::idmap2::utils 68 69 template <typename T> 70 std::ostream& operator<<(std::ostream& stream, const std::vector<T>& vector) { 71 bool first = true; 72 stream << "["; 73 for (const auto& item : vector) { 74 if (!first) { 75 stream << ", "; 76 } 77 stream << item; 78 first = false; 79 } 80 stream << "]"; 81 return stream; 82 } 83 84 #endif // IDMAP2_INCLUDE_IDMAP2_SYSTRACE_H_ 85