C++ (Cpp) ACE_Shared_Memory Beispiele

Beispiel #1

Datei: ShmemInputStream.cpp Projekt: jam2w0i1n3/yarp

bool ShmemInputStreamImpl::Resize()
{
	++m_ResizeNum;

	ACE_Shared_Memory* pNewMap;

	//printf("input stream resize %d to %d\n",m_ResizeNum,m_pHeader->newsize);
	//fflush(stdout);

#ifdef ACE_LACKS_SYSV_SHMEM

	char file_path[1024];

	if (ACE::get_temp_dir(file_path,1024)==-1)
	{
		YARP_ERROR(Logger::get(),"ShmemHybridStream: no temp directory found.");
		return false;
	}

	char file_name[1024];
	sprintf(file_name,"%sSHMEM_FILE_%d_%d",file_path,m_Port,m_ResizeNum);

	pNewMap=new ACE_Shared_Memory_MM(file_name, //const ACE_TCHAR *filename,
		m_pHeader->newsize+sizeof(ShmemHeader_t), //int len = -1,
		O_RDWR, //int flags = O_RDWR | O_CREAT,
		ACE_DEFAULT_FILE_PERMS, //int mode = ACE_DEFAULT_FILE_PERMS,
		PROT_RDWR, //int prot = PROT_RDWR,
		ACE_MAP_SHARED); //int share = ACE_MAP_PRIVATE,

#else

	int shmemkey=(m_ResizeNum<<16)+m_Port;

	pNewMap=new ACE_Shared_Memory_SV(shmemkey,m_pHeader->size+sizeof(ShmemHeader_t));

#endif

	if (!pNewMap)
	{
		YARP_ERROR(Logger::get(),String("ShmemOutputStream can't create shared memory"));
		return false;
	}

	ShmemHeader_t *pNewHeader=(ShmemHeader_t*)pNewMap->malloc();
	char *pNewData=(char*)(pNewHeader+1);

	m_pMap->close();
	delete m_pMap;

	m_pMap=pNewMap;
	m_pHeader=pNewHeader;
	m_pData=pNewData;

	return true;
}

Beispiel #2

Datei: ShmemOutputStream.cpp Projekt: claudiofantacci/yarp

bool ShmemOutputStreamImpl::Resize(int newsize)
{
    ++m_ResizeNum;

    //printf("output stream resize %d to %d\n", m_ResizeNum, newsize);
    //fflush(stdout);

    ACE_Shared_Memory* pNewMap;

    m_pHeader->resize = true;
    m_pHeader->newsize = newsize;

#ifdef ACE_LACKS_SYSV_SHMEM

    char file_path[1024];

    if (ACE::get_temp_dir(file_path, 1024) == -1) {
        yError("ShmemHybridStream: no temp directory found.");
        return false;
    }

    char file_name[1024];
    sprintf(file_name, "%sSHMEM_FILE_%d_%d", file_path, m_Port, m_ResizeNum);

    pNewMap = new ACE_Shared_Memory_MM(file_name, //const ACE_TCHAR *filename,
                                       newsize + sizeof(ShmemHeader_t), //int len = -1,
                                       O_RDWR | O_CREAT, //int flags = O_RDWR | O_CREAT,
                                       ACE_DEFAULT_FILE_PERMS, //int mode = ACE_DEFAULT_FILE_PERMS,
                                       PROT_RDWR, //int prot = PROT_RDWR,
                                       ACE_MAP_SHARED); //int share = ACE_MAP_PRIVATE,

#else

    int shmemkey = (m_ResizeNum << 16) + m_Port;

    pNewMap = new ACE_Shared_Memory_SV(shmemkey, newsize + sizeof(ShmemHeader_t), ACE_Shared_Memory_SV::ACE_CREATE);

#endif

    if (!pNewMap) {
        yError("ShmemOutputStream can't create shared memory");
        return false;
    }

    ShmemHeader_t* pNewHeader = (ShmemHeader_t*)pNewMap->malloc();
    char* pNewData = (char*)(pNewHeader + 1);

    pNewHeader->size = newsize;
    pNewHeader->resize = false;
    pNewHeader->close = m_pHeader->close;

    pNewHeader->tail = 0;
    pNewHeader->head = pNewHeader->avail = m_pHeader->avail;
    pNewHeader->waiting = m_pHeader->waiting;

    if (m_pHeader->avail) {
        // one or two blocks in circular queue?
        if (m_pHeader->tail < m_pHeader->head) {
            memcpy(pNewData, m_pData + m_pHeader->tail, m_pHeader->avail);
        } else {
            int firstchunk = m_pHeader->size - m_pHeader->tail;
            memcpy(pNewData, m_pData + m_pHeader->tail, firstchunk);
            memcpy(pNewData + firstchunk, m_pData, m_pHeader->head);
        }
    }

    m_pMap->close();
    delete m_pMap;
    m_pMap = pNewMap;

    m_pHeader = pNewHeader;
    m_pData = pNewData;

    return true;
}