53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
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/***********************************************************************
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*
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* At Work Fax: FAX Inter Process Communication
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*
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*
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* Copyright 1992, 1993 Microsoft Corporation. All Rights Reserved.
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*
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*
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***********************************************************************/
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// Message queue structure: This lives in shared memory
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typedef struct _IPC_MSG {
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UINT uMessageId; // Message Identifier
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WPARAM wParam; // wParam message specific data
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LPARAM lParam; // lParam message specific data
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} IPC_MSG, *LPIPC_MSG;
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// Message queue header: This lives at the top of shared memory
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typedef struct _IPC_QUEUE {
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DWORD cEntries; // Count of entries in queue
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DWORD cMaxEntries; // Maximum number of entries to fit in queue
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IPC_MSG Messages[]; // Queue of entries
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} IPC_QUEUE, *LPIPC_QUEUE;
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// IPC structure: This lives in local memory of each process
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typedef struct _FAX_IPC {
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HANDLE hevNew; // Event handle to be triggered on new data
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HANDLE hmtxAccess; // Mutex handle to control access to IPC queue
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HANDLE hMapFile; // Mapped File handle
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LPIPC_QUEUE lpQueue; // Pointer to queue of IPC messages
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} FAX_IPC, *LPFAX_IPC;
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#define ERROR_APPLICATION_DEFINED 0x20000000
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#define FAXIPC_ERROR_QUEUE_FULL (ERROR_APPLICATION_DEFINED | 1)
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//
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// Function Templates
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//
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LPFAX_IPC IPCOpen(PUCHAR lpName);
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BOOL IPCPost(LPFAX_IPC lpIPC, UINT uMessageId, WPARAM wParam, LPARAM lParam);
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BOOL IPCGetMessage(LPFAX_IPC lpIPC, PUINT lpuMessageId, WPARAM * lpwParam,
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LPARAM * lplParam, UINT uMsgFilterMin, UINT uMsgFilterMax, DWORD dwTimeout);
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BOOL IPCWait(LPFAX_IPC lpIPC, PUINT lpuMessageId, WPARAM * lpwParam,
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LPARAM * lplParam, DWORD dwTimeout);
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BOOL IPCTest(LPFAX_IPC lpIPC);
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BOOL IPCClear(LPFAX_IPC lpIPC);
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BOOL IPCClose(LPFAX_IPC lpIPC);
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