bool QSharedMemoryPrivate::create(int size)
{
QString function = QLatin1String("QSharedMemory::create");
if (nativeKey.isEmpty()) {
error = QSharedMemory::KeyError;
errorString = QSharedMemory::tr("%1: key error").arg(function);
return false;
}
// Create the file mapping.
#if defined(Q_OS_WINPHONE)
Q_UNIMPLEMENTED();
Q_UNUSED(size)
hand = 0;
#elif defined(Q_OS_WINRT)
hand = CreateFileMappingFromApp(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, size, (PCWSTR)nativeKey.utf16());
#else
hand = CreateFileMapping(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, 0, size, (wchar_t*)nativeKey.utf16());
#endif
setErrorString(function);
// hand is valid when it already exists unlike unix so explicitly check
if (error == QSharedMemory::AlreadyExists || !hand)
return false;
return true;
}
HANDLE QSharedMemoryPrivate::handle()
{
if (!hand) {
QString function = QLatin1String("QSharedMemory::handle");
if (nativeKey.isEmpty()) {
error = QSharedMemory::KeyError;
errorString = QSharedMemory::tr("%1: unable to make key").arg(function);
return 0;
}
#if defined(Q_OS_WINPHONE)
Q_UNIMPLEMENTED();
hand = 0;
#elif defined(Q_OS_WINRT)
hand = CreateFileMappingFromApp(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, 0, (PCWSTR)nativeKey.utf16());
#elif defined(Q_OS_WINCE)
// This works for opening a mapping too, but always opens it with read/write access in
// attach as it seems.
hand = CreateFileMapping(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, 0, 0, (wchar_t*)nativeKey.utf16());
#else
hand = OpenFileMapping(FILE_MAP_ALL_ACCESS, false, (wchar_t*)nativeKey.utf16());
#endif
if (!hand) {
setErrorString(function);
return 0;
}
}
return hand;
}
void*
mono_file_map (size_t length, int flags, int fd, guint64 offset, void **ret_handle)
{
void *ptr;
int mflags = 0;
HANDLE file, mapping;
int prot = mono_mmap_win_prot_from_flags (flags);
mflags = FILE_MAP_READ;
if (flags & MONO_MMAP_WRITE)
mflags = FILE_MAP_COPY;
file = (HANDLE) _get_osfhandle (fd);
mapping = CreateFileMappingFromApp (file, NULL, prot, length, NULL);
if (mapping == NULL)
return NULL;
ptr = MapViewOfFileFromApp (mapping, mflags, offset, length);
if (ptr == NULL) {
CloseHandle (mapping);
return NULL;
}
*ret_handle = (void*)mapping;
return ptr;
}
