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/*
* @copyright Copyright (c) 2016-2020 TOYOTA MOTOR CORPORATION.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
////////////////////////////////////////////////////////////////////////////////////////////////////
/// \ingroup tag_NSSharedMemory
/// \brief This file contains implementation of class CNSSharedMemReader.
/// This class provides API to open, close and perform read operation on shared memory.
///
////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////
// Include Files
////////////////////////////////////////////////////////////////////////////////////////////////////
#include <native_service/ns_sharedmem.h>
#include <native_service/ns_sharedmem_writer.h>
#include <string>
////////////////////////////////////////////////////////////////////////////////////////////////
/// CNSSharedMemWriter
/// Constructor of CNSSharedMemWriter class
////////////////////////////////////////////////////////////////////////////////////////////////
CNSSharedMemWriter::CNSSharedMemWriter(): m_pShmWriter(NULL) {
}
////////////////////////////////////////////////////////////////////////////////////////////////
/// CNSSharedMemWriter
/// Parameterized Constructor of CNSSharedMemWriter class
////////////////////////////////////////////////////////////////////////////////////////////////
CNSSharedMemWriter::CNSSharedMemWriter(const std::string &f_cSharedMemName, const UI_32 f_uiSize) {
m_pShmWriter = new(std::nothrow) CNSSharedMem(f_cSharedMemName, f_uiSize);
}
////////////////////////////////////////////////////////////////////////////////////////////////
/// ~CNSSharedMemWriter
/// Destructor of CNSSharedMemWriter class.
/// Closes the shared memory, if it is open.
////////////////////////////////////////////////////////////////////////////////////////////////
CNSSharedMemWriter::~CNSSharedMemWriter() {
if (NULL != m_pShmWriter) {
if (m_pShmWriter->IsOpen()) {
m_pShmWriter->Close();
}
delete m_pShmWriter;
m_pShmWriter = NULL;
}
}
////////////////////////////////////////////////////////////////////////////////////////////////
/// Open
/// This function opens and maps the shared memory object.
/// It creates the shared memory if it does not exists.
////////////////////////////////////////////////////////////////////////////////////////////////
EFrameworkunifiedStatus CNSSharedMemWriter::Open() {
EFrameworkunifiedStatus l_eStatus = eFrameworkunifiedStatusOK;
if (NULL != m_pShmWriter) {
l_eStatus = m_pShmWriter->Open();
} else {
l_eStatus = eFrameworkunifiedStatusNullPointer;
}
return l_eStatus;
}
////////////////////////////////////////////////////////////////////////////////////////////////
/// IsOpen
/// This function is used to check whether the shared memory buffer is opened or not.
////////////////////////////////////////////////////////////////////////////////////////////////
BOOL CNSSharedMemWriter::IsOpen() {
BOOL l_bOpen = FALSE;
if (NULL != m_pShmWriter) {
l_bOpen = m_pShmWriter->IsOpen();
}
return l_bOpen;
}
////////////////////////////////////////////////////////////////////////////////////////////////
/// Close
/// This function unmaps the shared memory object.
////////////////////////////////////////////////////////////////////////////////////////////////
EFrameworkunifiedStatus CNSSharedMemWriter::Close() {
EFrameworkunifiedStatus l_eStatus = eFrameworkunifiedStatusOK;
if (NULL != m_pShmWriter) {
l_eStatus = m_pShmWriter->Close();
} else {
l_eStatus = eFrameworkunifiedStatusNullPointer;
}
return l_eStatus;
}
////////////////////////////////////////////////////////////////////////////////////////////////
/// Write
/// This function writes the data into the shared memory.
////////////////////////////////////////////////////////////////////////////////////////////////
SI_32 CNSSharedMemWriter::Write(PCSTR buffer, const UI_32 f_uilength) {
SI_32 l_iWriteSize = NS_SHM_ERROR;
if ((NULL != m_pShmWriter) && (NULL != buffer) && (0 != f_uilength)) {
l_iWriteSize = m_pShmWriter->Write(buffer, f_uilength);
}
return l_iWriteSize;
}
////////////////////////////////////////////////////////////////////////////////////////////////
/// ClearBuf
/// This function clears the shared memory buffer.
////////////////////////////////////////////////////////////////////////////////////////////////
EFrameworkunifiedStatus CNSSharedMemWriter::ClearBuf() {
EFrameworkunifiedStatus l_eStatus = eFrameworkunifiedStatusOK;
if (NULL != m_pShmWriter) {
l_eStatus = m_pShmWriter->ClearBuf();
} else {
l_eStatus = eFrameworkunifiedStatusNullPointer;
}
return l_eStatus;
}
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