void flush() {
if ( _view == NULL || _fd == 0 )
return;
if ( msync(_view, _len, MS_SYNC ) == 0 )
return;
if ( errno == EBADF ) {
// ok, we were unlocked, so this file was closed
return;
}
// some error, lets see if we're supposed to exist
LockMongoFilesShared mmfilesLock;
if ( MongoFile::getAllFiles().count( _theFile ) == 0 ) {
log() << "msync failed with: " << errnoWithDescription()
<< " but file doesn't exist anymore, so ignoring";
// this was deleted while we were unlocked
return;
}
// we got an error, and we still exist, so this is bad, we fail
problem() << "msync " << errnoWithDescription() << endl;
dataSyncFailedHandler();
}
void flush() {
if ( _view == NULL || _fd == 0 )
return;
if ( msync(_view, _len, MS_SYNC ) == 0 )
return;
if ( errno == EBADF ) {
// ok, we were unlocked, so this file was closed
return;
}
// some error, lets see if we're supposed to exist
LockMongoFilesShared mmfilesLock;
std::set<MongoFile*> mmfs = MongoFile::getAllFiles();
std::set<MongoFile*>::const_iterator it = mmfs.find(_theFile);
if ( (it == mmfs.end()) || ((*it)->getUniqueId() != _id) ) {
log() << "msync failed with: " << errnoWithDescription()
<< " but file doesn't exist anymore, so ignoring";
// this was deleted while we were unlocked
return;
}
// we got an error, and we still exist, so this is bad, we fail
problem() << "msync " << errnoWithDescription() << endl;
dataSyncFailedHandler();
}
void MemoryMappedFile::flush(bool sync) {
if ( views.empty() || fd == 0 )
return;
if ( msync(viewForFlushing(), len, sync ? MS_SYNC : MS_ASYNC) ) {
// msync failed, this is very bad
problem() << "msync failed: " << errnoWithDescription();
dataSyncFailedHandler();
}
}
void flush() {
if (!_view || !_fd)
return;
{
LockMongoFilesShared mmfilesLock;
std::set<MongoFile*> mmfs = MongoFile::getAllFiles();
std::set<MongoFile*>::const_iterator it = mmfs.find(_theFile);
if (it == mmfs.end() || (*it)->getUniqueId() != _id) {
// this was deleted while we were unlocked
return;
}
// Hold the flush mutex to ensure the file is not closed during flush
_flushMutex.lock();
}
stdx::lock_guard<stdx::mutex> lk(_flushMutex, stdx::adopt_lock);
int loopCount = 0;
bool success = false;
bool timeout = false;
int dosError = ERROR_SUCCESS;
const int maximumTimeInSeconds = 60 * 15;
Timer t;
while (!success && !timeout) {
++loopCount;
success = FALSE != FlushViewOfFile(_view, 0);
if (!success) {
dosError = GetLastError();
if (dosError != ERROR_LOCK_VIOLATION) {
break;
}
timeout = t.seconds() > maximumTimeInSeconds;
}
}
if (success && loopCount > 1) {
log() << "FlushViewOfFile for " << _filename << " succeeded after " << loopCount
<< " attempts taking " << t.millis() << "ms" << endl;
} else if (!success) {
log() << "FlushViewOfFile for " << _filename << " failed with error " << dosError
<< " after " << loopCount << " attempts taking " << t.millis() << "ms" << endl;
// Abort here to avoid data corruption
fassert(16387, false);
}
success = FALSE != FlushFileBuffers(_fd);
if (!success) {
int err = GetLastError();
log() << "FlushFileBuffers failed: " << errnoWithDescription(err)
<< " file: " << _filename << endl;
dataSyncFailedHandler();
}
}
void flush() {
if (!_view || !_fd)
return;
LockMongoFilesShared mmfilesLock;
if ( MongoFile::getAllFiles().count( _theFile ) == 0 ) {
// this was deleted while we were unlocked
return;
}
SimpleMutex::scoped_lock _globalFlushMutex(globalFlushMutex);
scoped_lock lk(*_flushMutex);
int loopCount = 0;
bool success = false;
bool timeout = false;
int dosError = ERROR_SUCCESS;
const int maximumTimeInSeconds = 60 * 15;
Timer t;
while ( !success && !timeout ) {
++loopCount;
success = FALSE != FlushViewOfFile( _view, 0 );
if ( !success ) {
dosError = GetLastError();
if ( dosError != ERROR_LOCK_VIOLATION ) {
break;
}
timeout = t.seconds() > maximumTimeInSeconds;
}
}
if ( success && loopCount > 1 ) {
log() << "FlushViewOfFile for " << _filename
<< " succeeded after " << loopCount
<< " attempts taking " << t.millis()
<< "ms" << endl;
}
else if ( !success ) {
log() << "FlushViewOfFile for " << _filename
<< " failed with error " << dosError
<< " after " << loopCount
<< " attempts taking " << t.millis()
<< "ms" << endl;
// Abort here to avoid data corruption
fassert(16387, false);
}
success = FALSE != FlushFileBuffers(_fd);
if (!success) {
int err = GetLastError();
out() << "FlushFileBuffers failed: " << errnoWithDescription( err )
<< " file: " << _filename << endl;
dataSyncFailedHandler();
}
}
void MemoryMappedFile::flush(bool sync) {
if (views.empty() || fd == 0)
return;
bool useFsync = sync && !ProcessInfo::preferMsyncOverFSync();
if (useFsync ? fsync(fd) != 0 : msync(viewForFlushing(), len, sync ? MS_SYNC : MS_ASYNC)) {
// msync failed, this is very bad
log() << (useFsync ? "fsync failed: " : "msync failed: ") << errnoWithDescription()
<< " file: " << filename() << endl;
dataSyncFailedHandler();
}
}
