通过在起始时刻和停止时刻分别调用下面的代码，返回的时间相减，便可获得这段时间的毫秒数，其跨Windows、Linux、VxWorks三个平台。

#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;
}

关键字：Windows Linux VxWorks GetTickCount 时间 c c++ 跨平台

KEY WORDS: Windows Linux VxWorks GetTickCount Time c C++ cross platform independent