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122 lines
2.3 KiB
122 lines
2.3 KiB
//========= 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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