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      1 /*
      2  * Copyright (C) 2012 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 ANDROID_TRACE_H
     18 #define ANDROID_TRACE_H
     19 
     20 #if defined(__ANDROID__)
     21 
     22 #include <fcntl.h>
     23 #include <stdint.h>
     24 #include <stdio.h>
     25 #include <string.h>
     26 #include <sys/stat.h>
     27 #include <sys/types.h>
     28 #include <unistd.h>
     29 
     30 #include <cutils/compiler.h>
     31 #include <utils/threads.h>
     32 #include <cutils/trace.h>
     33 
     34 // See <cutils/trace.h> for more ATRACE_* macros.
     35 
     36 // ATRACE_NAME traces the beginning and end of the current scope.  To trace
     37 // the correct start and end times this macro should be declared first in the
     38 // scope body.
     39 #define ATRACE_NAME(name) android::ScopedTrace ___tracer(ATRACE_TAG, name)
     40 // ATRACE_CALL is an ATRACE_NAME that uses the current function name.
     41 #define ATRACE_CALL() ATRACE_NAME(__FUNCTION__)
     42 
     43 namespace android {
     44 
     45 class ScopedTrace {
     46 public:
     47 inline ScopedTrace(uint64_t tag, const char* name)
     48     : mTag(tag) {
     49     atrace_begin(mTag,name);
     50 }
     51 
     52 inline ~ScopedTrace() {
     53     atrace_end(mTag);
     54 }
     55 
     56 private:
     57     uint64_t mTag;
     58 };
     59 
     60 }; // namespace android
     61 
     62 #else // !__ANDROID__
     63 
     64 #define ATRACE_NAME(...)
     65 #define ATRACE_CALL()
     66 
     67 #endif // __ANDROID__
     68 
     69 #endif // ANDROID_TRACE_H
     70