void SharedFile::createFile()
{
// create the file first
int fd = scidb::File::openFile(getName().c_str(), (O_RDONLY|O_CREAT|O_EXCL));
if (fd < 0) {
int err=errno;
if (err==EEXIST) {
throw AlreadyExistsException(err, REL_FILE, __FUNCTION__, __LINE__);
}
throw SystemErrorException(err, REL_FILE, __FUNCTION__, __LINE__);
}
if (scidb::File::closeFd(fd) != 0) {
int err=errno;
throw SystemErrorException(err, REL_FILE, __FUNCTION__, __LINE__);
}
}
void SharedFile::truncate(uint64_t size, bool force)
{
if (!_file) {
throw InvalidStateException(REL_FILE, __FUNCTION__, __LINE__);
}
if (_region && !force) {
throw InvalidStateException(REL_FILE, __FUNCTION__, __LINE__);
}
_region.reset();
if (::truncate(getName().c_str(), size) != 0) {
int err = errno;
throw SystemErrorException(err, REL_FILE, __FUNCTION__, __LINE__);
}
}
void SharedFile::create(AccessMode amode)
{
if (_file || _region) {
throw InvalidStateException(REL_FILE, __FUNCTION__, __LINE__);
}
createFile();
try {
_file.reset(new file_mapping(getName().c_str(),
static_cast<boost::interprocess::mode_t>(amode)));
} catch(boost::interprocess::interprocess_exception &ex) {
std::cerr << "shared file::create error:" << ex.what() << std::endl;
if (ex.get_error_code() != boost::interprocess::no_error) {
throw SystemErrorException(ex.get_native_error(), REL_FILE, __FUNCTION__, __LINE__);
}
throw;
}
}
void SharedMemory::open(AccessMode amode)
{
if (_shm || _region) {
throw InvalidStateException(REL_FILE, __FUNCTION__, __LINE__);
}
try {
_shm.reset(new shared_memory_object(open_only, getName().c_str(),
static_cast<boost::interprocess::mode_t>(amode)));
} catch(boost::interprocess::interprocess_exception &ex) {
std::cerr << "shm::open error:" << ex.what() << std::endl;
if (ex.get_error_code() == boost::interprocess::not_found_error) {
throw NotFoundException(ex.get_native_error(), REL_FILE, __FUNCTION__, __LINE__);
}
if (ex.get_error_code() != boost::interprocess::no_error) {
throw SystemErrorException(ex.get_native_error(), REL_FILE, __FUNCTION__, __LINE__);
}
throw;
}
}
void SharedMemory::truncate(uint64_t size, bool force)
{
if (!_shm) {
throw InvalidStateException(REL_FILE, __FUNCTION__, __LINE__);
}
if (_region && !force) {
throw InvalidStateException(REL_FILE, __FUNCTION__, __LINE__);
}
try {
_region.reset();
_shm->truncate(size);
} catch(boost::interprocess::interprocess_exception &ex) {
std::cerr << "shm::truncate error:" << ex.what() << std::endl;
if (ex.get_error_code() != boost::interprocess::no_error) {
throw SystemErrorException(ex.get_native_error(), REL_FILE, __FUNCTION__, __LINE__);
}
throw;
}
}
void* SharedMemory::get()
{
if (!_region) {
if (!_shm) {
throw InvalidStateException(REL_FILE, __FUNCTION__, __LINE__);
}
try {
// map the whole shared memory in this process
_region.reset(new mapped_region((*_shm), _shm->get_mode()));
} catch(boost::interprocess::interprocess_exception &ex) {
std::cerr << "shm::map error:" << ex.what() << std::endl;
if (ex.get_error_code() != boost::interprocess::no_error) {
throw SystemErrorException(ex.get_native_error(), REL_FILE, __FUNCTION__, __LINE__);
}
throw;
}
}
assert(_region);
return _region->get_address();
}
void* SharedFile::get()
{
if (!_region) {
if (!_file) {
throw InvalidStateException(REL_FILE, __FUNCTION__, __LINE__);
}
try {
// map the whole shared memory in this process
_region.reset(new mapped_region((*_file), _file->get_mode()));
//XXXX TODO tigor: consider close()
} catch(boost::interprocess::interprocess_exception &ex) {
std::cerr << "shared file::map error:" << ex.what() << std::endl;
if (ex.get_error_code() != boost::interprocess::no_error) {
throw SystemErrorException(ex.get_native_error(), REL_FILE, __FUNCTION__, __LINE__);
}
throw;
}
preallocateShmMemory();
}
assert(_region);
return _region->get_address();
}