TLSのスレッドローカルストレージ

#pragma once

#include "ComHead.h"

DWORD g_UseTLS;

void InitStartTime()
{
    DWORD dwStart = GetTickCount();
    TlsSetValue(g_UseTLS, (LPVOID)(dwStart));
}

void PrintUseTime()
{
    DWORD dwEnd = GetTickCount();
    char PrintString[256] = {0};
    sprintf_s(PrintString, "ThreadId:  %d, UseTime: %d\r\n", GetCurrentThreadId(), dwEnd - (DWORD)TlsGetValue(g_UseTLS));
    cout << PrintString;
}

UINT _stdcall Threadproc(LPVOID lparam)
{
    InitStartTime();

    int i = 1000 * 10000;
    while (--i)
    {

    }
    PrintUseTime();
    return 0;
}

void UseThreadTLS()
{
    HANDLE h_Array[10] = { 0 };
    UINT ThreadID;
    for (int i = 0; i < 10; ++i)
    {
        h_Array[i] = (HANDLE)_beginthreadex(nullptr, 0, Threadproc, nullptr, 0, &ThreadID);
    }

    WaitForMultipleObjects(10, h_Array, TRUE, INFINITE);
    for (int i = 0; i < 10; ++i)
    {
        CloseHandle(h_Array[i]);
    }
}