1 /* 2 * Copyright (C)2011 D. R. Commander. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * - Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * - Redistributions in binary form must reproduce the above copyright notice, 10 * this list of conditions and the following disclaimer in the documentation 11 * and/or other materials provided with the distribution. 12 * - Neither the name of the libjpeg-turbo Project nor the names of its 13 * contributors may be used to endorse or promote products derived from this 14 * software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS", 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifdef _WIN32 30 31 #include <windows.h> 32 33 static double getfreq(void) 34 { 35 LARGE_INTEGER freq; 36 if(!QueryPerformanceFrequency(&freq)) return 0.0; 37 return (double)freq.QuadPart; 38 } 39 40 static double f=-1.0; 41 42 double gettime(void) 43 { 44 LARGE_INTEGER t; 45 if(f<0.0) f=getfreq(); 46 if(f==0.0) return (double)GetTickCount()/1000.; 47 else 48 { 49 QueryPerformanceCounter(&t); 50 return (double)t.QuadPart/f; 51 } 52 } 53 54 #else 55 56 #include <stdlib.h> 57 #include <sys/time.h> 58 59 double gettime(void) 60 { 61 struct timeval tv; 62 if(gettimeofday(&tv, NULL)<0) return 0.0; 63 else return (double)tv.tv_sec+((double)tv.tv_usec/1000000.); 64 } 65 66 #endif 67
