windows编程点滴(六)之线程同步之线程局部存储

主线程为线程局部存储分配索引DWORD TlsAlloc(void);

释放 TlsFree(DWORD dwTlsIndex);

调用TlsSetValue和TlsGetValue设置和读取线程数组中的值

BOOL TlsSetValue(DWORD dwTlsIndex , LPVOID lpTlsValue)

LPVOID TlsGetValue(DWORD dwTlsIndex);

#include <windows.h>

#include <stdio.h>

#include <process.h>

DWORD g_tlsUsedTime;

void InitStartTime(){

DWORD dwStart = GetTickCount();

TlsSetValue(g_tlsUsedTime,(LPVOID)dwStart);

}

DWORD GetUsedTime(){

DWORD dwElapsed = GetTickCount();

dwElapsed = dwElapsed - (DWORD)TlsGetValue(g_tlsUsedTime);

return dwElapsed;

}

UINT WINAPI ThreadProc(LPVOID){

int i;

InitStartTime();

i = 10000 * 10000;

while (i--)

{

}

printf("ThreadId = %u\tElapsedTime = %u\n",GetCurrentThreadId(),

GetUsedTime());

return 0;

}

void InitTlsAlloc(){

g_tlsUsedTime = TlsAlloc();

}

int _cdecl main(int argc,char* argv[])

{

UINT uid;

int i;

HANDLE h[10];

InitTlsAlloc();

for(i = 0;i < 10; i++)

{

h[i] = (HANDLE)_beginthreadex(NULL,0,ThreadProc,NULL,0,&uid);

}

for (i = 0; i < 10; i++)

{

WaitForSingleObject(h[i],INFINITE);

CloseHandle(h[i]);

}

TlsFree(g_tlsUsedTime);

return 0;

}