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Diffstat (limited to 'third_party/libopenjpeg20/opj_clock.c')
| -rw-r--r-- | third_party/libopenjpeg20/opj_clock.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/third_party/libopenjpeg20/opj_clock.c b/third_party/libopenjpeg20/opj_clock.c new file mode 100644 index 0000000000..0df99ef04d --- /dev/null +++ b/third_party/libopenjpeg20/opj_clock.c @@ -0,0 +1,64 @@ +/* + * The copyright in this software is being made available under the 2-clauses + * BSD License, included below. This software may be subject to other third + * party and contributor rights, including patent rights, and no such rights + * are granted under this license. + * + * Copyright (c) 2005, Herve Drolon, FreeImage Team + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifdef _WIN32 +#include <windows.h> +#else +#include <sys/time.h> +#include <sys/resource.h> +#include <sys/times.h> +#endif /* _WIN32 */ +#include "opj_includes.h" + +OPJ_FLOAT64 opj_clock(void) { +#ifdef _WIN32 + /* _WIN32: use QueryPerformance (very accurate) */ + LARGE_INTEGER freq , t ; + /* freq is the clock speed of the CPU */ + QueryPerformanceFrequency(&freq) ; + /* cout << "freq = " << ((double) freq.QuadPart) << endl; */ + /* t is the high resolution performance counter (see MSDN) */ + QueryPerformanceCounter ( & t ) ; + return ( t.QuadPart /(OPJ_FLOAT64) freq.QuadPart ) ; +#else + /* Unix or Linux: use resource usage */ + struct rusage t; + OPJ_FLOAT64 procTime; + /* (1) Get the rusage data structure at this moment (man getrusage) */ + getrusage(0,&t); + /* (2) What is the elapsed time ? - CPU time = User time + System time */ + /* (2a) Get the seconds */ + procTime = (OPJ_FLOAT64)(t.ru_utime.tv_sec + t.ru_stime.tv_sec); + /* (2b) More precisely! Get the microseconds part ! */ + return ( procTime + (OPJ_FLOAT64)(t.ru_utime.tv_usec + t.ru_stime.tv_usec) * 1e-6 ) ; +#endif +} + |