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/*
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 * Copyright (c) 2007 Netlabs
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 * Copyright (c) 2006 Mozilla Corporation
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 * Copyright (c) 2006 Red Hat, Inc.
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 * Copyright (c) 2011 Andrea Canciani
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 *
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 * Permission to use, copy, modify, distribute, and sell this software
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 * and its documentation for any purpose is hereby granted without
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 * fee, provided that the above copyright notice appear in all copies
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 * and that both that copyright notice and this permission notice
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 * appear in supporting documentation, and that the name of
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 * the authors not be used in advertising or publicity pertaining to
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 * distribution of the software without specific, written prior
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 * permission. The authors make no representations about the
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 * suitability of this software for any purpose.  It is provided "as
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 * is" without express or implied warranty.
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 *
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 * THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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 * FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL,
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 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 *
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 * Authors: Peter Weilbacher <mozilla@weilbacher.org>
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 *	    Vladimir Vukicevic <vladimir@pobox.com> (win32/linux code)
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 *	    Carl Worth <cworth@cworth.org> (win32/linux code)
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 *          Andrea Canciani <ranma42@gmail.com>
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 */
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#include "cairo-perf.h"

            

        

            

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#include "../src/cairo-time-private.h"

            

        

            

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#if HAVE_UNISTD_H

            

        

            

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#include <unistd.h>

            

        

            

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#endif

            

        

            

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#if defined(_WIN32)

            

        

            

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#include <windows.h>

            

        

            

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#elif defined(_POSIX_PRIORITY_SCHEDULING)

            

        

            

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#include <sched.h>

            

        

            

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#endif

            

        

            

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/* timers */

            

        

            

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static cairo_time_t timer;

            

        

            

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static cairo_perf_timer_synchronize_t cairo_perf_timer_synchronize = NULL;

            

        

            

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static void *cairo_perf_timer_synchronize_closure = NULL;

            

        

            

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void

            

        

            

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cairo_perf_timer_set_synchronize (cairo_perf_timer_synchronize_t  synchronize,

            

        

            

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				  void				 *closure)

            

        

            

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{

            

        

            

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    cairo_perf_timer_synchronize = synchronize;

            

        

            

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    cairo_perf_timer_synchronize_closure = closure;

            

        

            

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}

            

        

            

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void

            

        

            

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cairo_perf_timer_start (void)

            

        

            

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{

            

        

            

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    timer = _cairo_time_get ();

            

        

            

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}

            

        

            

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void

            

        

            

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cairo_perf_timer_stop (void)

            

        

            

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{

            

        

            

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    if (cairo_perf_timer_synchronize)

            

        

            

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	cairo_perf_timer_synchronize (cairo_perf_timer_synchronize_closure);

            

        

            

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    timer = _cairo_time_get_delta (timer);

            

        

            

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}

            

        

            

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cairo_time_t

            

        

            

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cairo_perf_timer_elapsed (void)

            

        

            

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{

            

        

            

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    return timer;

            

        

            

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}

            

        

            

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void

            

        

            

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cairo_perf_yield (void)

            

        

            

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{

            

        

            

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    /* try to deactivate this thread until the scheduler calls it again */

            

        

            

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#if defined(_WIN32)

            

        

            

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    SleepEx(0, TRUE);

            

        

            

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#elif defined(_POSIX_PRIORITY_SCHEDULING)

            

        

            

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    sched_yield ();

            

        

            

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#else

            

        

            

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    sleep (0);

            

        

            

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#endif

            

        

            

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}