void* MemoryMappedFile::remapPrivateView(void *oldPrivateAddr) {
d.dbMutex.assertWriteLocked(); // short window where we are unmapped so must be exclusive
RemapLock lk; // Interlock with PortMessageServer::acceptedMP() to stop thread creation
clearWritableBits(oldPrivateAddr);
if( !UnmapViewOfFile(oldPrivateAddr) ) {
DWORD dosError = GetLastError();
log() << "UnMapViewOfFile for " << filename()
<< " failed with error " << errnoWithDescription( dosError ) << endl;
fassertFailed( 16147 );
}
void* newPrivateView = MapViewOfFileEx(
maphandle, // file mapping handle
FILE_MAP_READ, // access
0, 0, // file offset, high and low
0, // bytes to map, 0 == all
oldPrivateAddr ); // we want the same address we had before
if ( 0 == newPrivateView ) {
DWORD dosError = GetLastError();
log() << "MapViewOfFileEx for " << filename()
<< " failed with error " << errnoWithDescription( dosError ) << endl;
}
fassert( 16148, newPrivateView == oldPrivateAddr );
return newPrivateView;
}
void* MemoryMappedFile::remapPrivateView(void *oldPrivateAddr) {
verify( Lock::isW() );
LockMongoFilesExclusive lockMongoFiles;
clearWritableBits(oldPrivateAddr);
if( !UnmapViewOfFile(oldPrivateAddr) ) {
DWORD dosError = GetLastError();
log() << "UnMapViewOfFile for " << filename()
<< " failed with error " << errnoWithDescription( dosError )
<< " in MemoryMappedFile::remapPrivateView"
<< endl;
fassertFailed( 16168 );
}
void* newPrivateView = MapViewOfFileEx(
maphandle, // file mapping handle
FILE_MAP_READ, // access
0, 0, // file offset, high and low
0, // bytes to map, 0 == all
oldPrivateAddr ); // we want the same address we had before
if ( 0 == newPrivateView ) {
DWORD dosError = GetLastError();
log() << "MapViewOfFileEx for " << filename()
<< " failed with error " << errnoWithDescription( dosError )
<< " (file size is " << len << ")"
<< " in MemoryMappedFile::remapPrivateView"
<< endl;
}
fassert( 16148, newPrivateView == oldPrivateAddr );
return newPrivateView;
}
void MemoryMappedFile::close() {
LockMongoFilesShared::assertExclusivelyLocked();
for( vector<void*>::iterator i = views.begin(); i != views.end(); i++ ) {
clearWritableBits(*i);
UnmapViewOfFile(*i);
}
views.clear();
if ( maphandle )
CloseHandle(maphandle);
maphandle = 0;
if ( fd )
CloseHandle(fd);
fd = 0;
destroyed(); // cleans up from the master list of mmaps
}
void* MemoryMappedFile::createPrivateMap() {
verify( maphandle );
scoped_lock lk(mapViewMutex);
LPVOID thisAddress = getNextMemoryMappedFileLocation( len );
void* privateMapAddress = NULL;
int current_retry = 0;
while (true) {
privateMapAddress = MapViewOfFileEx(
maphandle, // file mapping handle
FILE_MAP_READ, // access
0, 0, // file offset, high and low
0, // bytes to map, 0 == all
thisAddress); // address to place file
if (privateMapAddress == 0) {
DWORD dosError = GetLastError();
++current_retry;
// If we failed to allocate a memory mapped file, try again in case we picked
// an address that Windows is also trying to use for some other VM allocations
if (dosError == ERROR_INVALID_ADDRESS && current_retry < 5) {
continue;
}
log() << "MapViewOfFileEx for " << filename()
<< " failed with error " << errnoWithDescription(dosError)
<< " (file size is " << len << ")"
<< " in MemoryMappedFile::createPrivateMap"
<< endl;
fassertFailed(16167);
}
break;
}
clearWritableBits( privateMapAddress );
views.push_back( privateMapAddress );
return privateMapAddress;
}
void* MemoryMappedFile::createPrivateMap() {
verify( maphandle );
scoped_lock lk(mapViewMutex);
void *p = MapViewOfFile(maphandle, FILE_MAP_READ, 0, 0, 0);
if ( p == 0 ) {
DWORD e = GetLastError();
log() << "createPrivateMap failed " << filename() << " " <<
errnoWithDescription(e) << " filelen:" << len <<
((sizeof(void*) == 4 ) ? " (32 bit build)" : "") <<
endl;
}
else {
clearWritableBits(p);
views.push_back(p);
memconcept::is(p, memconcept::concept::memorymappedfile, filename());
}
return p;
}
void MemoryMappedFile::close() {
LockMongoFilesShared::assertExclusivelyLocked();
// Prevent flush and close from concurrently running
boost::lock_guard<boost::mutex> lk(_flushMutex);
for( vector<void*>::iterator i = views.begin(); i != views.end(); i++ ) {
clearWritableBits(*i);
UnmapViewOfFile(*i);
}
views.clear();
if ( maphandle )
CloseHandle(maphandle);
maphandle = 0;
if ( fd )
CloseHandle(fd);
fd = 0;
destroyed(); // cleans up from the master list of mmaps
}
void* MemoryMappedFile::createPrivateMap() {
verify( maphandle );
scoped_lock lk(mapViewMutex);
void* privateMapAddress = MapViewOfFile(
maphandle, // file mapping handle
FILE_MAP_READ, // access
0, 0, // file offset, high and low
0 ); // bytes to map, 0 == all
if ( privateMapAddress == 0 ) {
DWORD dosError = GetLastError();
log() << "MapViewOfFile for " << filename()
<< " failed with error " << errnoWithDescription( dosError )
<< " (file size is " << len << ")"
<< " in MemoryMappedFile::createPrivateMap"
<< endl;
fassertFailed( 16167 );
}
clearWritableBits( privateMapAddress );
views.push_back( privateMapAddress );
memconcept::is( privateMapAddress, memconcept::concept::memorymappedfile, filename() );
return privateMapAddress;
}
