85 lines
3.7 KiB
C
85 lines
3.7 KiB
C
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// --------------------------------------------------------------------------
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// Module Name: APIDispatcher.h
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//
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// Copyright (c) 1999-2000, Microsoft Corporation
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//
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// A class that handles API requests in the server on a separate thread. Each
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// thread is dedicated to respond to a single client. This is acceptable for
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// a lightweight server.
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//
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// History: 1999-11-07 vtan created
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// 2000-08-25 vtan moved from Neptune to Whistler
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// --------------------------------------------------------------------------
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#ifndef _APIDispatcher_
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#define _APIDispatcher_
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#include "KernelResources.h"
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#include "PortMessage.h"
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#include "Queue.h"
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#include "WorkItem.h"
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class CAPIRequest; // This would be circular otherwise
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// --------------------------------------------------------------------------
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// CAPIDispatcher
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//
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// Purpose: This class processes requests from a client when signaled to.
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// CAPIDispatcher::QueueRequest is called by a thread which
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// monitors an LPC port. Once the request is queued an event is
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// signaled to wake the thread which processes client requests.
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// The thread processes all queued requests and wait for the
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// event to be signaled again.
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//
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// History: 1999-11-07 vtan created
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// 2000-08-25 vtan moved from Neptune to Whistler
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// --------------------------------------------------------------------------
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class CAPIDispatcher : public CWorkItem
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{
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private:
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friend class CCatchCorruptor;
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CAPIDispatcher (void);
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public:
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CAPIDispatcher (HANDLE hClientProcess);
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virtual ~CAPIDispatcher (void);
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HANDLE GetClientProcess (void) const;
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DWORD GetClientSessionID (void) const;
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void SetPort (HANDLE hPort);
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HANDLE GetSection (void);
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void* GetSectionAddress (void) const;
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NTSTATUS CloseConnection (void);
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NTSTATUS QueueRequest (const CPortMessage& portMessage);
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NTSTATUS ExecuteRequest (const CPortMessage& portMessage);
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NTSTATUS RejectRequest (const CPortMessage& portMessage, NTSTATUS status) const;
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virtual NTSTATUS CreateAndQueueRequest (const CPortMessage& portMessage) = 0;
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virtual NTSTATUS CreateAndExecuteRequest (const CPortMessage& portMessage) = 0;
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protected:
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virtual void Entry (void);
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NTSTATUS Execute (CAPIRequest *pAPIRequest) const;
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virtual NTSTATUS CreateSection (void);
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NTSTATUS SignalRequestPending (void);
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private:
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NTSTATUS SendReply (const CPortMessage& portMessage) const;
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#ifdef DEBUG
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static bool ExcludedStatusCodeForDebug (NTSTATUS status);
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#endif /* DEBUG */
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static LONG WINAPI DispatcherExceptionFilter (struct _EXCEPTION_POINTERS *pExceptionInfo);
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protected:
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HANDLE _hSection;
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void* _pSection;
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CQueue _queue;
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private:
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HANDLE _hProcessClient;
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HANDLE _hPort;
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bool _fRequestsPending,
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_fConnectionClosed;
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CCriticalSection _lock;
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};
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#endif /* _APIDispatcher_ */
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