125 lines
3.2 KiB
OpenEdge ABL
125 lines
3.2 KiB
OpenEdge ABL
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/*++
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Copyright (c) Microsoft Corporation. All rights reserved.
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Module Name:
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mspthrd.h
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Abstract:
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Definitions for MSP thread management classes.
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--*/
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#ifndef __MSPTHRD_H
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#define __MSPTHRD_H
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//
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// Commands that the worker worker thread can handle.
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//
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typedef enum
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{
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WORK_ITEM, // process a work item
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STOP, // kill the worker thread.
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} COMMAND;
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typedef struct
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{
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COMMAND cmd;
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LPTHREAD_START_ROUTINE pfn;
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PVOID pContext;
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HANDLE hEvent;
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} COMMAND_NODE;
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typedef struct
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{
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LIST_ENTRY link;
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COMMAND_NODE node;
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} COMMAND_QUEUE_ITEM;
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typedef struct _NOTIF_LIST
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{
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CMSPAddress *addr;
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_NOTIF_LIST *next;
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} NOTIF_LIST, *PNOTIF_LIST;
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class CMSPThread
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{
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public:
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CMSPThread()
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{
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InitializeListHead(&m_CommandQueue);
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m_hCommandEvent = NULL;
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m_hThread = NULL;
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m_NotifList = NULL;
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m_iStartCount = 0;
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}
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~CMSPThread() { };
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HRESULT Start();
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HRESULT Stop();
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// Shutdown is used to clean up the thread unconditionally. This can be
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// used as an alternative to matched Start() / Stop() calls.
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HRESULT Shutdown();
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HRESULT ThreadProc();
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static LRESULT CALLBACK NotifWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
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HRESULT RegisterPnpNotification(CMSPAddress *pCMSPAddress);
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HRESULT UnregisterPnpNotification(CMSPAddress *pCMSPAddress);
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HRESULT QueueWorkItem(
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LPTHREAD_START_ROUTINE Function,
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PVOID Context,
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BOOL fSynchronous
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);
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private:
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BOOL SignalThreadProc() { return SetEvent(m_hCommandEvent); }
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private:
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CMSPCritSection m_CountLock; // Protects start count
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CMSPCritSection m_QueueLock; // Protects command queue
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int m_iStartCount; // number of times we've been
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// started minus number of times
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// we've been stopped. If == 0
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// then we actually stop thread.
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LIST_ENTRY m_CommandQueue; // Queue of commands for thread
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// to process.
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HANDLE m_hCommandEvent; // Signaled to tell us to do
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// something.
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HANDLE m_hThread; // The thread handle. We need to
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// save it so that we can wait
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// for it when stopping the
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// thread.
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HDEVNOTIFY m_hDevNotifyVideo; // Handles of device notification registration
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HDEVNOTIFY m_hDevNotifyAudio; // for video and audio devices.
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HWND m_hWndNotif; // Window handle for notification window
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PNOTIF_LIST m_NotifList; // List of notification functions to call
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// on a PNP event
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CMSPCritSection m_NotifLock; // Notification list critical section
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};
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extern CMSPThread g_Thread;
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#endif // __MSPTHRD_H
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// eof
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