1 // Copyright 2007-2008 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #include "v8.h" 29 30 #include "counters.h" 31 #include "platform.h" 32 33 namespace v8 { 34 namespace internal { 35 36 CounterLookupCallback StatsTable::lookup_function_ = NULL; 37 CreateHistogramCallback StatsTable::create_histogram_function_ = NULL; 38 AddHistogramSampleCallback StatsTable::add_histogram_sample_function_ = NULL; 39 40 // Start the timer. 41 void StatsCounterTimer::Start() { 42 if (!counter_.Enabled()) 43 return; 44 stop_time_ = 0; 45 start_time_ = OS::Ticks(); 46 } 47 48 // Stop the timer and record the results. 49 void StatsCounterTimer::Stop() { 50 if (!counter_.Enabled()) 51 return; 52 stop_time_ = OS::Ticks(); 53 54 // Compute the delta between start and stop, in milliseconds. 55 int milliseconds = static_cast<int>(stop_time_ - start_time_) / 1000; 56 counter_.Increment(milliseconds); 57 } 58 59 // Start the timer. 60 void HistogramTimer::Start() { 61 if (GetHistogram() != NULL) { 62 stop_time_ = 0; 63 start_time_ = OS::Ticks(); 64 } 65 } 66 67 // Stop the timer and record the results. 68 void HistogramTimer::Stop() { 69 if (histogram_ != NULL) { 70 stop_time_ = OS::Ticks(); 71 72 // Compute the delta between start and stop, in milliseconds. 73 int milliseconds = static_cast<int>(stop_time_ - start_time_) / 1000; 74 StatsTable::AddHistogramSample(histogram_, milliseconds); 75 } 76 } 77 78 } } // namespace v8::internal 79
