1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/sandbox/chromium/base/profiler/alternate_timer.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,44 @@
1.4 +// Copyright (c) 2012 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +// This is a glue file, which allows third party code to call into our profiler
1.9 +// without having to include most any functions from base.
1.10 +
1.11 +#ifndef BASE_PROFILER_ALTERNATE_TIMER_H_
1.12 +#define BASE_PROFILER_ALTERNATE_TIMER_H_
1.13 +
1.14 +#include "base/base_export.h"
1.15 +
1.16 +namespace tracked_objects {
1.17 +
1.18 +enum TimeSourceType {
1.19 + TIME_SOURCE_TYPE_WALL_TIME,
1.20 + TIME_SOURCE_TYPE_TCMALLOC
1.21 +};
1.22 +
1.23 +// Provide type for an alternate timer function.
1.24 +typedef unsigned int NowFunction();
1.25 +
1.26 +// Environment variable name that is used to activate alternate timer profiling
1.27 +// (such as using TCMalloc allocations to provide a pseudo-timer) for tasks
1.28 +// instead of wall clock profiling.
1.29 +BASE_EXPORT extern const char kAlternateProfilerTime[];
1.30 +
1.31 +// Set an alternate timer function to replace the OS time function when
1.32 +// profiling. Typically this is called by an allocator that is providing a
1.33 +// function that indicates how much memory has been allocated on any given
1.34 +// thread.
1.35 +BASE_EXPORT void SetAlternateTimeSource(NowFunction* now_function,
1.36 + TimeSourceType type);
1.37 +
1.38 +// Gets the pointer to a function that was set via SetAlternateTimeSource().
1.39 +// Returns NULL if no set was done prior to calling GetAlternateTimeSource.
1.40 +NowFunction* GetAlternateTimeSource();
1.41 +
1.42 +// Returns the type of the currently set time source.
1.43 +BASE_EXPORT TimeSourceType GetTimeSourceType();
1.44 +
1.45 +} // namespace tracked_objects
1.46 +
1.47 +#endif // BASE_PROFILER_ALTERNATE_TIMER_H_
