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      1 /*
      2  * Copyright (C) 2014 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 #include "benchmark.h"
     18 
     19 #include <pthread.h>
     20 
     21 // Stop GCC optimizing out our pure function.
     22 /* Must not be static! */ pthread_t (*pthread_self_fp)() = pthread_self;
     23 
     24 static void BM_pthread_self(int iters) {
     25   StartBenchmarkTiming();
     26 
     27   for (int i = 0; i < iters; ++i) {
     28     pthread_self_fp();
     29   }
     30 
     31   StopBenchmarkTiming();
     32 }
     33 BENCHMARK(BM_pthread_self);
     34 
     35 static void BM_pthread_getspecific(int iters) {
     36   StopBenchmarkTiming();
     37   pthread_key_t key;
     38   pthread_key_create(&key, NULL);
     39   StartBenchmarkTiming();
     40 
     41   for (int i = 0; i < iters; ++i) {
     42     pthread_getspecific(key);
     43   }
     44 
     45   StopBenchmarkTiming();
     46   pthread_key_delete(key);
     47 }
     48 BENCHMARK(BM_pthread_getspecific);
     49 
     50 static void DummyPthreadOnceInitFunction() {
     51 }
     52 
     53 static void BM_pthread_once(int iters) {
     54   StopBenchmarkTiming();
     55   pthread_once_t once = PTHREAD_ONCE_INIT;
     56   pthread_once(&once, DummyPthreadOnceInitFunction);
     57   StartBenchmarkTiming();
     58 
     59   for (int i = 0; i < iters; ++i) {
     60     pthread_once(&once, DummyPthreadOnceInitFunction);
     61   }
     62 
     63   StopBenchmarkTiming();
     64 }
     65 BENCHMARK(BM_pthread_once);
     66 
     67 static void BM_pthread_mutex_lock(int iters) {
     68   StopBenchmarkTiming();
     69   pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
     70   StartBenchmarkTiming();
     71 
     72   for (int i = 0; i < iters; ++i) {
     73     pthread_mutex_lock(&mutex);
     74     pthread_mutex_unlock(&mutex);
     75   }
     76 
     77   StopBenchmarkTiming();
     78 }
     79 BENCHMARK(BM_pthread_mutex_lock);
     80 
     81 static void BM_pthread_mutex_lock_ERRORCHECK(int iters) {
     82   StopBenchmarkTiming();
     83   pthread_mutex_t mutex = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER;
     84   StartBenchmarkTiming();
     85 
     86   for (int i = 0; i < iters; ++i) {
     87     pthread_mutex_lock(&mutex);
     88     pthread_mutex_unlock(&mutex);
     89   }
     90 
     91   StopBenchmarkTiming();
     92 }
     93 BENCHMARK(BM_pthread_mutex_lock_ERRORCHECK);
     94 
     95 static void BM_pthread_mutex_lock_RECURSIVE(int iters) {
     96   StopBenchmarkTiming();
     97   pthread_mutex_t mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER;
     98   StartBenchmarkTiming();
     99 
    100   for (int i = 0; i < iters; ++i) {
    101     pthread_mutex_lock(&mutex);
    102     pthread_mutex_unlock(&mutex);
    103   }
    104 
    105   StopBenchmarkTiming();
    106 }
    107 BENCHMARK(BM_pthread_mutex_lock_RECURSIVE);
    108