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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
- #ifndef __SMEM_HPP__
- #define __SMEM_HPP__
-
- //
- // Need this for Win16 since it is an undocumented message
- //
- #ifndef WIN32
-
- #define WM_COPYDATA 0x004A
-
- /*
- * lParam of WM_COPYDATA message points to...
- */
- typedef struct tagCOPYDATASTRUCT {
- DWORD dwData;
- DWORD cbData;
- LPVOID lpData;
- } COPYDATASTRUCT, *PCOPYDATASTRUCT;
-
- # ifndef LPCTSTR
- # define LPCTSTR LPCSTR
- # endif
-
-
- #endif // ifndef WIN32
-
- // The following structure will be stored in the shared memory
- // and will be used to pass data back and forth
-
- #pragma pack(4)
-
- typedef struct
- {
- DWORD m_dwSize; // size of the shared memory block
- BYTE m_buf[1]; // this is the buffer of memory to be used
- } CSharedMem;
-
- #pragma pack(4)
-
- // ******************************************************
- // Public routines...
- // ******************************************************
- //
- //
- // *create new* shared memory chunk
- // once this is created, use the pointer
- // to the segment to to store data
- // e.g.:
- // lpString = "string for communicator";
- // lstrcpy((LPSTR)pData->m_buf[0], lpString);
- // pData->m_dwBytesUsed = lstrlen(lpString) + 1; // count '\0'
- //
- CSharedMem *
- NSCreateSharedMemory(DWORD memSize, LPCTSTR memName, HANDLE *hSharedMemory);
-
- //
- // *open existing* shared memory chunk
- // once you have the pointer to the new segment
- // use this pointer to access data, e.g.:
- //
- // This will return the pointer to the memory chunk as well as
- // fill out the hSharedMemory argument that is needed for subsequent
- // operations.
- //
- // if(pData->m_dwBytesUsed > 0)
- // {
- // // use pData->m_buf here
- // }
- //
- CSharedMem *
- NSOpenExistingSharedMemory(LPCTSTR memName, HANDLE *hSharedMemory);
-
- //
- // You must pass in the pointer to the memory chunk as well as
- // the hSharedMemory HANDLE to close shared memory segment
- //
- void
- NSCloseSharedMemory(CSharedMem *pData, HANDLE hSharedMemory);
-
- #endif // __SMEM_HPP__
-