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      1 /**************************************************************************
      2  *
      3  * Copyright 2008-2010 VMware, Inc.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 
     28 /**
     29  * @file
     30  * OS independent time-manipulation functions.
     31  *
     32  * @author Jose Fonseca <jfonseca (at) vmware.com>
     33  */
     34 
     35 
     36 #include "pipe/p_config.h"
     37 
     38 #if defined(PIPE_OS_UNIX)
     39 #  include <sys/time.h> /* timeval */
     40 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
     41 #  include <windows.h>
     42 #else
     43 #  error Unsupported OS
     44 #endif
     45 
     46 #include "os_time.h"
     47 
     48 
     49 int64_t
     50 os_time_get(void)
     51 {
     52 #if defined(PIPE_OS_UNIX)
     53 
     54    struct timeval tv;
     55    gettimeofday(&tv, NULL);
     56    return tv.tv_usec + tv.tv_sec*1000000LL;
     57 
     58 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
     59 
     60    static LARGE_INTEGER frequency;
     61    LARGE_INTEGER counter;
     62    if(!frequency.QuadPart)
     63       QueryPerformanceFrequency(&frequency);
     64    QueryPerformanceCounter(&counter);
     65    return counter.QuadPart*INT64_C(1000000)/frequency.QuadPart;
     66 
     67 #endif
     68 }
     69 
     70 
     71 #if defined(PIPE_SUBSYSTEM_WINDOWS_USER)
     72 
     73 void
     74 os_time_sleep(int64_t usecs)
     75 {
     76    Sleep((usecs + 999) / 1000);
     77 }
     78 
     79 #endif
     80