bool cac::accessRightsRespAction (
callbackManager & mgr, tcpiiu &,
const epicsTime &, const caHdrLargeArray & hdr, void * /* pMsgBody */ )
{
epicsGuard < epicsMutex > guard ( this->mutex );
nciu * pChan = this->chanTable.lookup ( hdr.m_cid );
if ( pChan ) {
unsigned ar = hdr.m_available;
caAccessRights accessRights (
( ar & CA_PROTO_ACCESS_RIGHT_READ ) ? true : false,
( ar & CA_PROTO_ACCESS_RIGHT_WRITE ) ? true : false);
pChan->accessRightsStateChange ( accessRights, mgr.cbGuard, guard );
}
return true;
}
PassRefPtr<SharedMemory> SharedMemory::create(const Handle& handle, Protection protection)
{
DWORD desiredAccess = accessRights(protection);
void* baseAddress = ::MapViewOfFile(handle.m_handle, desiredAccess, 0, 0, handle.m_size);
if (!baseAddress)
return 0;
RefPtr<SharedMemory> memory = adoptRef(new SharedMemory);
memory->m_size = handle.m_size;
memory->m_data = baseAddress;
// Adopt the HANDLE.
memory->m_handle = handle.m_handle;
handle.m_handle = 0;
return memory.release();
}
PassRefPtr<SharedMemory> SharedMemory::create(const Handle& handle, Protection protection)
{
if (handle.isNull())
return 0;
DWORD desiredAccess = accessRights(protection);
void* baseAddress = ::MapViewOfFile(handle.m_handle, desiredAccess, 0, 0, handle.m_size);
ASSERT_WITH_MESSAGE(baseAddress, "::MapViewOfFile failed with error %lu", ::GetLastError());
if (!baseAddress)
return 0;
RefPtr<SharedMemory> memory = adoptRef(new SharedMemory);
memory->m_size = handle.m_size;
memory->m_data = baseAddress;
// Adopt the HANDLE.
memory->m_handle = handle.m_handle;
handle.m_handle = 0;
return memory.release();
}
bool SharedMemory::createHandle(Handle& handle, Protection protection)
{
ASSERT_ARG(handle, !handle.m_handle);
ASSERT_ARG(handle, !handle.m_size);
HANDLE processHandle = ::GetCurrentProcess();
HANDLE duplicatedHandle;
if (!::DuplicateHandle(processHandle, m_handle, processHandle, &duplicatedHandle, accessRights(protection), FALSE, 0))
return false;
handle.m_handle = duplicatedHandle;
handle.m_size = m_size;
return true;
}