123 lines
2.3 KiB
C++
123 lines
2.3 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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//=============================================================================//
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// Class for sending idle messages to a window
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#include "stdafx.h"
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#include "win_idle.h"
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// Stub function to get into the object's main thread loop
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DWORD WINAPI CWinIdle::ThreadStub(LPVOID pIdle)
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{
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return ((CWinIdle *)pIdle)->RunIdle();
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}
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CWinIdle::CWinIdle() :
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m_hIdleThread(NULL),
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m_hIdleEvent(NULL),
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m_hStopEvent(NULL),
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m_hWnd(0),
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m_uMsg(0),
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m_dwDelay(0)
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{
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}
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CWinIdle::~CWinIdle()
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{
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EndIdle();
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}
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DWORD CWinIdle::RunIdle()
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{
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// Set up an event list
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HANDLE aEvents[2];
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aEvents[0] = m_hStopEvent;
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aEvents[1] = m_hIdleEvent;
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// Wait for a stop or idle event
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while (WaitForMultipleObjects(2, aEvents, FALSE, INFINITE) != WAIT_OBJECT_0)
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{
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// Send an idle message
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PostMessage(m_hWnd, m_uMsg, m_wParam, m_lParam);
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// Wait for a bit...
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Sleep(m_dwDelay);
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}
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return 0;
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}
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BOOL CWinIdle::StartIdle(HWND hWnd, UINT uMessage, WPARAM wParam, LPARAM lParam, DWORD dwDelay)
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{
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// Make sure it's not already running
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if (m_hIdleThread)
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return FALSE;
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// Make sure they send in a valid handle..
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if (!hWnd)
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return FALSE;
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// Create the events
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m_hIdleEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
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m_hStopEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
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// Make sure the events got created
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if ((!m_hIdleEvent) || (!m_hStopEvent))
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return FALSE;
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// Create the thread
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DWORD dwThreadID;
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m_hIdleThread = CreateThread(NULL, 0, CWinIdle::ThreadStub, (void *)this, 0, &dwThreadID);
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if (m_hIdleThread)
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{
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SetThreadPriority(m_hIdleThread, THREAD_PRIORITY_IDLE);
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m_hWnd = hWnd;
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m_uMsg = uMessage;
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m_wParam = wParam;
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m_lParam = lParam;
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m_dwDelay = dwDelay;
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}
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return m_hIdleThread != 0;
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}
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BOOL CWinIdle::EndIdle()
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{
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// Make sure it's running
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if (!m_hIdleThread)
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return FALSE;
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// Stop the idle thread
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SetEvent(m_hStopEvent);
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WaitForSingleObject(m_hIdleThread, INFINITE);
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CloseHandle(m_hIdleThread);
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// Get rid of the event objects
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CloseHandle(m_hIdleEvent);
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CloseHandle(m_hStopEvent);
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// Set everything back to 0
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m_hIdleEvent = 0;
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m_hStopEvent = 0;
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m_hIdleThread = 0;
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return TRUE;
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}
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void CWinIdle::NextIdle()
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{
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// Make sure the thread's running
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if (!m_hIdleThread)
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return;
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// Signal an idle message
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SetEvent(m_hIdleEvent);
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}
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