/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- AcquireTimerInfo
- ContinueTimer
- DestroyTimerInfo
- ElapsedTime
- GetElapsedTime
- GetTimerInfo
- GetUserTime
- ResetTimer
- StartTimer
- StopTimer
- UserTime
/*
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% TTTTT IIIII M M EEEEE RRRR %
% T I MM MM E R R %
% T I M M M EEE RRRR %
% T I M M E R R %
% T IIIII M M EEEEE R R %
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% MagickCore Timing Methods %
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% Software Design %
% John Cristy %
% January 1993 %
% %
% %
% Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
% %
% You may not use this file except in compliance with the License. You may %
% obtain a copy of the License at %
% %
% http://www.imagemagick.org/script/license.php %
% %
% Unless required by applicable law or agreed to in writing, software %
% distributed under the License is distributed on an "AS IS" BASIS, %
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
% See the License for the specific language governing permissions and %
% limitations under the License. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Contributed by Bill Radcliffe and Bob Friesenhahn.
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/log.h"
#include "magick/memory_.h"
#include "magick/timer.h"
/*
Define declarations.
*/
#if defined(macintosh)
#define CLK_TCK CLOCKS_PER_SEC
#endif
#if !defined(CLK_TCK)
#define CLK_TCK sysconf(_SC_CLK_TCK)
#endif
/*
Forward declarations.
*/
static double
UserTime(void);
static void
StopTimer(TimerInfo *);
/*
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% A c q u i r e T i m e r I n f o %
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% AcquireTimerInfo() initializes the TimerInfo structure. It effectively
% creates a stopwatch and starts it.
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% The format of the AcquireTimerInfo method is:
%
% TimerInfo *AcquireTimerInfo(void)
%
*/
MagickExport TimerInfo *AcquireTimerInfo(void)
{
TimerInfo
*timer_info;
timer_info=(TimerInfo *) AcquireMagickMemory(sizeof(*timer_info));
if (timer_info == (TimerInfo *) NULL)
ThrowFatalException(ResourceLimitFatalError,"UnableToAcquireString");
(void) ResetMagickMemory(timer_info,0,sizeof(*timer_info));
timer_info->signature=MagickSignature;
GetTimerInfo(timer_info);
return(timer_info);
}
/*
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% C o n t i n u e T i m e r %
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% ContinueTimer() resumes a stopped stopwatch. The stopwatch continues
% counting from the last StartTimer() onwards.
%
% The format of the ContinueTimer method is:
%
% MagickBooleanType ContinueTimer(TimerInfo *time_info)
%
% A description of each parameter follows.
%
% o time_info: Time statistics structure.
%
*/
MagickExport MagickBooleanType ContinueTimer(TimerInfo *time_info)
{
assert(time_info != (TimerInfo *) NULL);
assert(time_info->signature == MagickSignature);
if (time_info->state == UndefinedTimerState)
return(MagickFalse);
if (time_info->state == StoppedTimerState)
{
time_info->user.total-=time_info->user.stop-time_info->user.start;
time_info->elapsed.total-=time_info->elapsed.stop-
time_info->elapsed.start;
}
time_info->state=RunningTimerState;
return(MagickTrue);
}
/*
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% D e s t r o y T i m e r I n f o %
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% DestroyTimerInfo() zeros memory associated with the TimerInfo structure.
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% The format of the DestroyTimerInfo method is:
%
% TimerInfo *DestroyTimerInfo(TimerInfo *timer_info)
%
% A description of each parameter follows:
%
% o timer_info: The cipher context.
%
*/
MagickExport TimerInfo *DestroyTimerInfo(TimerInfo *timer_info)
{
assert(timer_info != (TimerInfo *) NULL);
assert(timer_info->signature == MagickSignature);
timer_info->signature=(~MagickSignature);
timer_info=(TimerInfo *) RelinquishMagickMemory(timer_info);
return(timer_info);
}
/*
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+ E l a p s e d T i m e %
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% ElapsedTime() returns the elapsed time (in seconds) since the last call to
% StartTimer().
%
% The format of the ElapsedTime method is:
%
% double ElapsedTime()
%
*/
static double ElapsedTime(void)
{
#if defined(MAGICKCORE_HAVE_TIMES)
struct tms
timer;
return((double) times(&timer)/CLK_TCK);
#else
#if defined(MAGICKCORE_WINDOWS_SUPPORT)
return(NTElapsedTime());
#else
return((double) clock()/CLK_TCK);
#endif
#endif
}
/*
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% G e t E l a p s e d T i m e %
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% GetElapsedTime() returns the elapsed time (in seconds) passed between the
% start and stop events. If the stopwatch is still running, it is stopped
% first.
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% The format of the GetElapsedTime method is:
%
% double GetElapsedTime(TimerInfo *time_info)
%
% A description of each parameter follows.
%
% o time_info: Timer statistics structure.
%
*/
MagickExport double GetElapsedTime(TimerInfo *time_info)
{
assert(time_info != (TimerInfo *) NULL);
assert(time_info->signature == MagickSignature);
if (time_info->state == UndefinedTimerState)
return(0.0);
if (time_info->state == RunningTimerState)
StopTimer(time_info);
return(time_info->elapsed.total);
}
/*
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% GetTimerInfo() initializes the TimerInfo structure.
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% The format of the GetTimerInfo method is:
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% void GetTimerInfo(TimerInfo *time_info)
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% A description of each parameter follows.
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% o time_info: Timer statistics structure.
%
*/
MagickExport void GetTimerInfo(TimerInfo *time_info)
{
/*
Create a stopwatch and start it.
*/
assert(time_info != (TimerInfo *) NULL);
(void) ResetMagickMemory(time_info,0,sizeof(*time_info));
time_info->state=UndefinedTimerState;
time_info->signature=MagickSignature;
StartTimer(time_info,MagickTrue);
}
/*
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% GetUserTime() returns the User time (user and system) by the operating
% system (in seconds) between the start and stop events. If the stopwatch is
% still running, it is stopped first.
%
% The format of the GetUserTime method is:
%
% double GetUserTime(TimerInfo *time_info)
%
% A description of each parameter follows.
%
% o time_info: Timer statistics structure.
%
*/
MagickExport double GetUserTime(TimerInfo *time_info)
{
assert(time_info != (TimerInfo *) NULL);
assert(time_info->signature == MagickSignature);
if (time_info->state == UndefinedTimerState)
return(0.0);
if (time_info->state == RunningTimerState)
StopTimer(time_info);
return(time_info->user.total);
}
/*
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% R e s e t T i m e r %
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% ResetTimer() resets the stopwatch.
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% The format of the ResetTimer method is:
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% void ResetTimer(TimerInfo *time_info)
%
% A description of each parameter follows.
%
% o time_info: Timer statistics structure.
%
*/
MagickExport void ResetTimer(TimerInfo *time_info)
{
assert(time_info != (TimerInfo *) NULL);
assert(time_info->signature == MagickSignature);
StopTimer(time_info);
time_info->elapsed.stop=0.0;
time_info->user.stop=0.0;
}
/*
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% StartTimer() starts the stopwatch.
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% The format of the StartTimer method is:
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% void StartTimer(TimerInfo *time_info,const MagickBooleanType reset)
%
% A description of each parameter follows.
%
% o time_info: Timer statistics structure.
%
% o reset: If reset is MagickTrue, then the stopwatch is reset prior to
% starting. If reset is MagickFalse, then timing is continued without
% resetting the stopwatch.
%
*/
MagickExport void StartTimer(TimerInfo *time_info,const MagickBooleanType reset)
{
assert(time_info != (TimerInfo *) NULL);
assert(time_info->signature == MagickSignature);
if (reset != MagickFalse)
{
/*
Reset the stopwatch before starting it.
*/
time_info->user.total=0.0;
time_info->elapsed.total=0.0;
}
if (time_info->state != RunningTimerState)
{
time_info->elapsed.start=ElapsedTime();
time_info->user.start=UserTime();
}
time_info->state=RunningTimerState;
}
/*
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% StopTimer() stops the stopwatch.
%
% The format of the StopTimer method is:
%
% void StopTimer(TimerInfo *time_info)
%
% A description of each parameter follows.
%
% o time_info: Timer statistics structure.
%
*/
static void StopTimer(TimerInfo *time_info)
{
assert(time_info != (TimerInfo *) NULL);
assert(time_info->signature == MagickSignature);
time_info->elapsed.stop=ElapsedTime();
time_info->user.stop=UserTime();
if (time_info->state == RunningTimerState)
{
time_info->user.total+=time_info->user.stop-
time_info->user.start+MagickEpsilon;
time_info->elapsed.total+=time_info->elapsed.stop-
time_info->elapsed.start+MagickEpsilon;
}
time_info->state=StoppedTimerState;
}
/*
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% UserTime() returns the total time the process has been scheduled (in
% seconds) since the last call to StartTimer().
%
% The format of the UserTime method is:
%
% double UserTime()
%
*/
static double UserTime(void)
{
#if defined(MAGICKCORE_HAVE_TIMES)
struct tms
timer;
(void) times(&timer);
return((double) (timer.tms_utime+timer.tms_stime)/CLK_TCK);
#else
#if defined(MAGICKCORE_WINDOWS_SUPPORT)
return(NTUserTime());
#else
return((double) clock()/CLK_TCK);
#endif
#endif
}