mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-12 14:37:50 +00:00
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/* -*- 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__
|