base/perftimer.cc

   1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/perftimer.h"
   6
   7 #include <stdio.h>
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/file_path.h"
  12 #include "base/file_util.h"
  13 #include "base/logging.h"
  14
  15 static FILE* perf_log_file = NULL;
  16
  17 bool InitPerfLog(const base::FilePath& log_file) {
  18   if (perf_log_file) {
  19     // trying to initialize twice
  20     NOTREACHED();
  21     return false;
  22   }
  23
  24   perf_log_file = file_util::OpenFile(log_file, "w");
  25   return perf_log_file != NULL;
  26 }
  27
  28 void FinalizePerfLog() {
  29   if (!perf_log_file) {
  30     // trying to cleanup without initializing
  31     NOTREACHED();
  32     return;
  33   }
  34   file_util::CloseFile(perf_log_file);
  35 }
  36
  37 void LogPerfResult(const char* test_name, double value, const char* units) {
  38   if (!perf_log_file) {
  39     NOTREACHED();
  40     return;
  41   }
  42
  43   fprintf(perf_log_file, "%s\t%g\t%s\n", test_name, value, units);
  44   printf("%s\t%g\t%s\n", test_name, value, units);
  45 }