72 lines
2.7 KiB
C++
72 lines
2.7 KiB
C++
/*
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Copyright (c) 2009-2010 Christopher A. Taylor. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of LibCat nor the names of its contributors may be used
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to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CAT_CLOCK_HPP
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#define CAT_CLOCK_HPP
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#include <cat/Platform.hpp>
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#include <string>
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#include <cat/threads/Mutex.hpp>
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namespace cat {
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class Clock
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{
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#ifdef CAT_OS_WINDOWS
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static Mutex init_lock;
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static u32 initialized; // Number of times initialized
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static u32 period; // timegettime() and Windows scheduler period
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static double inv_freq; // Performance counter frequency (does not change, so cache it)
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#endif
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public:
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static bool Initialize();
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static bool Shutdown();
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static u32 sec(); // timestamp in seconds
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static u32 msec_fast(); // timestamp in milliseconds, less accurate than msec() but faster
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static u32 msec(); // timestamp in milliseconds, must call Initialize() first
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static double usec(); // timestamp in microseconds, must call Initialize() first
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static u32 cycles(); // timestamp in cycles
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static std::string format(const char *format_string);
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static void sleep(u32 milliseconds);
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static bool SetHighPriority();
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static bool SetNormalPriority();
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static u32 MeasureClocks(int iterations, void (*FunctionPtr)());
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};
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} // namespace cat
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#endif // CAT_CLOCK_HPP
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