vm_time_linux32.c

来自「这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数」· C语言 代码 · 共 46 行

/*
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//       Copyright(c) 2003-2005 Intel Corporation. All Rights Reserved.
//
*/

#ifdef LINUX32

#include <unistd.h>
#include <sys/time.h>
#include <sched.h>
#include "vm_time.h"

/* yield the execution of current thread for msec miliseconds */
void vm_time_sleep(unsigned int msec)
{
    if (msec)
        usleep(1000 * msec);
    else
        sched_yield();

} /* void vm_time_sleep(unsigned int msec) */

/* obtain the clock tick of an uninterrupted master clock */
vm_tick vm_time_get_tick(void)
{
    struct timeval tv;

    gettimeofday(&tv, NULL);
    return (vm_tick)tv.tv_sec * (vm_tick)1000000 + (vm_tick)tv.tv_usec;

} /* vm_tick vm_time_get_tick(void) */

/* obtain the master clock resolution */
vm_tick vm_time_get_frequency(void)
{
    return (vm_tick)1000000;

} /* vm_tick vm_time_get_frequency(void) */

#endif /* LINUX32 */