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      1 /*
      2  * Copyright 2011 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 #include "Benchmark.h"
      8 #include "SkMutex.h"
      9 #include "SkSharedMutex.h"
     10 #include "SkSpinlock.h"
     11 #include "SkString.h"
     12 
     13 template <typename Mutex>
     14 class MutexBench : public Benchmark {
     15 public:
     16     MutexBench(SkString benchPrefix) : fBenchName(benchPrefix += "UncontendedBenchmark") { }
     17     bool isSuitableFor(Backend backend) override {
     18         return backend == kNonRendering_Backend;
     19     }
     20 
     21 protected:
     22     const char* onGetName() override {
     23         return fBenchName.c_str();
     24     }
     25 
     26     void onDraw(int loops, SkCanvas*) override {
     27         for (int i = 0; i < loops; i++) {
     28             fMu.acquire();
     29             fMu.release();
     30         }
     31     }
     32 
     33 private:
     34     typedef Benchmark INHERITED;
     35     SkString fBenchName;
     36     Mutex fMu;
     37 };
     38 
     39 class SharedBench : public Benchmark {
     40 public:
     41     bool isSuitableFor(Backend backend) override {
     42         return backend == kNonRendering_Backend;
     43     }
     44 
     45 protected:
     46     const char* onGetName() override {
     47         return "SkSharedMutexSharedUncontendedBenchmark";
     48     }
     49 
     50     void onDraw(int loops, SkCanvas*) override {
     51         for (int i = 0; i < loops; i++) {
     52             fMu.acquireShared();
     53             fMu.releaseShared();
     54         }
     55     }
     56 
     57 private:
     58     typedef Benchmark INHERITED;
     59     SkSharedMutex fMu;
     60 };
     61 
     62 ///////////////////////////////////////////////////////////////////////////////
     63 
     64 DEF_BENCH( return new MutexBench<SkSharedMutex>(SkString("SkSharedMutex")); )
     65 DEF_BENCH( return new MutexBench<SkMutex>(SkString("SkMutex")); )
     66 DEF_BENCH( return new MutexBench<SkSpinlock>(SkString("SkSpinlock")); )
     67 DEF_BENCH( return new SharedBench; )
     68