Window、Linux、VxWorks下实现计时功能

#ifdef WIN32

#define OS_WINDOWS WIN32
#include <windows.h>
#endif

#ifdef LINUX
#include <unistd.h>
#include <sys/time.h>
#include <netinet/in.h>
#endif

#ifdef VXWORKS
#include "vxworks.h"
#include <tickLib.h>
#include <sysLib.h>
#endif

#define ULONAG unsigned long

ULONGA getTickCount(void)
{
    ULONGA currentTime;

    #ifdef WIN32
    currentTime = GetTickCount();
    #endif

    #ifdef LINUX
    struct timeval current;
    gettimeofday(&current, NULL);
    currentTime = current.tv_sec * 1000 + current.tv_usec/1000;
    #endif

    #ifdef OS_VXWORKS
    ULONGA timeSecond = tickGet() / sysClkRateGet();
    ULONGA timeMilsec = tickGet() % sysClkRateGet() * 1000 / sysClkRateGet();
    currentTime = timeSecond * 1000 + timeMilsec;
    #endif

    return currentTime;
}