void* MemoryMappedFile::createReadOnlyMap() {
verify( maphandle );
stdx::lock_guard<stdx::mutex> lk(mapViewMutex);
void* readOnlyMapAddress = NULL;
int current_retry = 0;
while (true) {
LPVOID thisAddress = getNextMemoryMappedFileLocation(len);
readOnlyMapAddress = 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 (0 == readOnlyMapAddress) {
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()
<< " at address " << thisAddress
<< " failed with error " << errnoWithDescription(dosError)
<< " (file size is " << len << ")"
<< " in MemoryMappedFile::createReadOnlyMap"
<< endl;
fassertFailed(16165);
}
break;
}
views.push_back( readOnlyMapAddress );
return readOnlyMapAddress;
}
void* MemoryMappedFile::createReadOnlyMap() {
verify( maphandle );
scoped_lock lk(mapViewMutex);
LPVOID thisAddress = getNextMemoryMappedFileLocation( len );
void* readOnlyMapAddress = 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 ( 0 == readOnlyMapAddress ) {
DWORD dosError = GetLastError();
log() << "MapViewOfFileEx for " << filename()
<< " failed with error " << errnoWithDescription( dosError )
<< " (file size is " << len << ")"
<< " in MemoryMappedFile::createReadOnlyMap"
<< endl;
fassertFailed( 16165 );
}
memconcept::is( readOnlyMapAddress, memconcept::concept::other, filename() );
views.push_back( readOnlyMapAddress );
return readOnlyMapAddress;
}
void* MemoryMappedFile::map(const char *filenameIn, unsigned long long &length, int options) {
verify( fd == 0 && len == 0 ); // can't open more than once
setFilename(filenameIn);
FileAllocator::get()->allocateAsap( filenameIn, length );
/* big hack here: Babble uses db names with colons. doesn't seem to work on windows. temporary perhaps. */
char filename[256];
strncpy(filename, filenameIn, 255);
filename[255] = 0;
{
size_t len = strlen( filename );
for ( size_t i=len-1; i>=0; i-- ) {
if ( filename[i] == '/' ||
filename[i] == '\\' )
break;
if ( filename[i] == ':' )
filename[i] = '_';
}
}
updateLength( filename, length );
{
DWORD createOptions = FILE_ATTRIBUTE_NORMAL;
if ( options & SEQUENTIAL )
createOptions |= FILE_FLAG_SEQUENTIAL_SCAN;
DWORD rw = GENERIC_READ | GENERIC_WRITE;
fd = CreateFileW(
toWideString(filename).c_str(),
rw, // desired access
FILE_SHARE_WRITE | FILE_SHARE_READ, // share mode
NULL, // security
OPEN_ALWAYS, // create disposition
createOptions , // flags
NULL); // hTempl
if ( fd == INVALID_HANDLE_VALUE ) {
DWORD dosError = GetLastError();
log() << "CreateFileW for " << filename
<< " failed with " << errnoWithDescription( dosError )
<< " (file size is " << length << ")"
<< " in MemoryMappedFile::map"
<< endl;
return 0;
}
}
mapped += length;
{
DWORD flProtect = PAGE_READWRITE; //(options & READONLY)?PAGE_READONLY:PAGE_READWRITE;
maphandle = CreateFileMappingW(fd, NULL, flProtect,
length >> 32 /*maxsizehigh*/,
(unsigned) length /*maxsizelow*/,
NULL/*lpName*/);
if ( maphandle == NULL ) {
DWORD dosError = GetLastError();
log() << "CreateFileMappingW for " << filename
<< " failed with " << errnoWithDescription( dosError )
<< " (file size is " << length << ")"
<< " in MemoryMappedFile::map"
<< endl;
close();
fassertFailed( 16225 );
}
}
void *view = 0;
{
scoped_lock lk(mapViewMutex);
DWORD access = ( options & READONLY ) ? FILE_MAP_READ : FILE_MAP_ALL_ACCESS;
LPVOID thisAddress = getNextMemoryMappedFileLocation( length );
view = MapViewOfFileEx(
maphandle, // file mapping handle
access, // access
0, 0, // file offset, high and low
0, // bytes to map, 0 == all
thisAddress ); // address to place file
if ( view == 0 ) {
DWORD dosError = GetLastError();
log() << "MapViewOfFileEx for " << filename
<< " failed with " << errnoWithDescription( dosError )
<< " (file size is " << length << ")"
<< " in MemoryMappedFile::map"
<< endl;
close();
fassertFailed( 16166 );
}
}
views.push_back(view);
memconcept::is(view, memconcept::concept::memorymappedfile, this->filename(), (unsigned) length);
len = length;
return view;
}
void* MemoryMappedFile::map(const char *filenameIn, unsigned long long &length, int options) {
verify( fd == 0 && len == 0 ); // can't open more than once
setFilename(filenameIn);
FileAllocator::get()->allocateAsap( filenameIn, length );
/* big hack here: Babble uses db names with colons. doesn't seem to work on windows. temporary perhaps. */
char filename[256];
strncpy(filename, filenameIn, 255);
filename[255] = 0;
{
size_t len = strlen( filename );
for ( size_t i=len-1; i>=0; i-- ) {
if ( filename[i] == '/' ||
filename[i] == '\\' )
break;
if ( filename[i] == ':' )
filename[i] = '_';
}
}
updateLength( filename, length );
{
DWORD createOptions = FILE_ATTRIBUTE_NORMAL;
if ( options & SEQUENTIAL )
createOptions |= FILE_FLAG_SEQUENTIAL_SCAN;
DWORD rw = GENERIC_READ | GENERIC_WRITE;
fd = CreateFileW(
toWideString(filename).c_str(),
rw, // desired access
FILE_SHARE_WRITE | FILE_SHARE_READ, // share mode
NULL, // security
OPEN_ALWAYS, // create disposition
createOptions , // flags
NULL); // hTempl
if ( fd == INVALID_HANDLE_VALUE ) {
DWORD dosError = GetLastError();
log() << "CreateFileW for " << filename
<< " failed with " << errnoWithDescription( dosError )
<< " (file size is " << length << ")"
<< " in MemoryMappedFile::map"
<< endl;
return 0;
}
}
mapped += length;
{
DWORD flProtect = PAGE_READWRITE; //(options & READONLY)?PAGE_READONLY:PAGE_READWRITE;
maphandle = CreateFileMappingW(fd, NULL, flProtect,
length >> 32 /*maxsizehigh*/,
(unsigned) length /*maxsizelow*/,
NULL/*lpName*/);
if ( maphandle == NULL ) {
DWORD dosError = GetLastError();
log() << "CreateFileMappingW for " << filename
<< " failed with " << errnoWithDescription( dosError )
<< " (file size is " << length << ")"
<< " in MemoryMappedFile::map"
<< endl;
close();
fassertFailed( 16225 );
}
}
void *view = 0;
{
stdx::lock_guard<stdx::mutex> lk(mapViewMutex);
DWORD access = ( options & READONLY ) ? FILE_MAP_READ : FILE_MAP_ALL_ACCESS;
int current_retry = 0;
while (true) {
LPVOID thisAddress = getNextMemoryMappedFileLocation(length);
view = MapViewOfFileEx(
maphandle, // file mapping handle
access, // access
0, 0, // file offset, high and low
0, // bytes to map, 0 == all
thisAddress); // address to place file
if (view == 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;
}
#ifndef _WIN64
// Warn user that if they are running a 32-bit app on 64-bit Windows
if (dosError == ERROR_NOT_ENOUGH_MEMORY) {
BOOL wow64Process;
BOOL retWow64 = IsWow64Process(GetCurrentProcess(), &wow64Process);
if (retWow64 && wow64Process) {
log() << "This is a 32-bit MongoDB binary running on a 64-bit"
" operating system that has run out of virtual memory for"
" databases. Switch to a 64-bit build of MongoDB to open"
" the databases.";
}
}
#endif
log() << "MapViewOfFileEx for " << filename
<< " at address " << thisAddress
<< " failed with " << errnoWithDescription(dosError)
<< " (file size is " << length << ")"
<< " in MemoryMappedFile::map"
<< endl;
close();
fassertFailed(16166);
}
break;
}
}
views.push_back(view);
len = length;
return view;
}
