static WatchedFile* NewWatchedFile(const WCHAR* filePath, const std::function<void()>& onFileChangedCb) {
bool isManualCheck = PathIsNetworkPath(filePath);
AutoFreeW dirPath(path::GetDir(filePath));
WatchedDir* wd = nullptr;
bool newDir = false;
if (!isManualCheck) {
wd = FindExistingWatchedDir(dirPath);
if (!wd) {
wd = NewWatchedDir(dirPath);
if (!wd)
return nullptr;
newDir = true;
}
}
WatchedFile* wf = AllocStruct<WatchedFile>();
wf->filePath = str::Dup(filePath);
wf->onFileChangedCb = onFileChangedCb;
wf->watchedDir = wd;
wf->isManualCheck = isManualCheck;
ListInsert(&g_watchedFiles, wf);
if (wf->isManualCheck) {
GetFileState(filePath, &wf->fileState);
AwakeWatcherThread();
} else {
if (newDir)
StartMonitoringDirForChanges(wf->watchedDir);
}
return wf;
}
static WatchedFile *NewWatchedFile(const WCHAR *filePath, FileChangeObserver *observer)
{
bool isManualCheck = PathIsNetworkPath(filePath);
ScopedMem<WCHAR> dirPath(path::GetDir(filePath));
WatchedDir *wd = nullptr;
bool newDir = false;
if (!isManualCheck) {
wd = FindExistingWatchedDir(dirPath);
if (!wd) {
wd = NewWatchedDir(dirPath);
if (!wd)
return nullptr;
newDir = true;
}
}
WatchedFile *wf = AllocStruct<WatchedFile>();
wf->filePath = str::Dup(filePath);
wf->observer = observer;
wf->watchedDir = wd;
wf->isManualCheck = isManualCheck;
ListInsert(&g_watchedFiles, wf);
if (wf->isManualCheck) {
GetFileState(filePath, &wf->fileState);
AwakeWatcherThread();
} else {
if (newDir)
StartMonitoringDirForChanges(wf->watchedDir);
}
return wf;
}
static void CALLBACK ReadDirectoryChangesNotification(DWORD errCode,
DWORD bytesTransfered, LPOVERLAPPED overlapped)
{
ScopedCritSec cs(&g_threadCritSec);
OverlappedEx *over = (OverlappedEx*)overlapped;
WatchedDir* wd = (WatchedDir*)over->data;
lf(L"ReadDirectoryChangesNotification() dir: %s, numBytes: %d", wd->dirPath, (int)bytesTransfered);
CrashIf(wd != wd->overlapped.data);
if (errCode == ERROR_OPERATION_ABORTED) {
lf(" ERROR_OPERATION_ABORTED");
DeleteWatchedDir(wd);
InterlockedDecrement(&gRemovalsPending);
return;
}
// This might mean overflow? Not sure.
if (!bytesTransfered)
return;
FILE_NOTIFY_INFORMATION *notify = (FILE_NOTIFY_INFORMATION*)wd->buf;
// collect files that changed, removing duplicates
WStrVec changedFiles;
for (;;) {
ScopedMem<WCHAR> fileName(str::DupN(notify->FileName, notify->FileNameLength / sizeof(WCHAR)));
// files can get updated either by writing to them directly or
// by writing to a .tmp file first and then moving that file in place
// (the latter only yields a RENAMED action with the expected file name)
if (notify->Action == FILE_ACTION_MODIFIED || notify->Action == FILE_ACTION_RENAMED_NEW_NAME) {
if (!changedFiles.Contains(fileName)) {
lf(L"ReadDirectoryChangesNotification() FILE_ACTION_MODIFIED, for '%s'", fileName);
changedFiles.Append(fileName.StealData());
} else {
lf(L"ReadDirectoryChangesNotification() eliminating duplicate notification for '%s'", fileName);
}
} else {
lf(L"ReadDirectoryChangesNotification() action=%d, for '%s'", (int)notify->Action, fileName);
}
// step to the next entry if there is one
DWORD nextOff = notify->NextEntryOffset;
if (!nextOff)
break;
notify = (FILE_NOTIFY_INFORMATION *)((char*)notify + nextOff);
}
StartMonitoringDirForChanges(wd);
for (const WCHAR *f : changedFiles) {
NotifyAboutFile(wd, f);
}
}
static void CALLBACK ReadDirectoryChangesNotification(DWORD errCode,
DWORD bytesTransfered, LPOVERLAPPED overlapped)
{
ScopedCritSec cs(&g_threadCritSec);
OverlappedEx *over = (OverlappedEx*)overlapped;
WatchedDir* wd = (WatchedDir*)over->data;
lf(L"ReadDirectoryChangesNotification() dir: %s, numBytes: %d", wd->dirPath, (int)bytesTransfered);
CrashIf(wd != wd->overlapped.data);
if (errCode == ERROR_OPERATION_ABORTED) {
lf(" ERROR_OPERATION_ABORTED");
DeleteWatchedDir(wd);
return;
}
// This might mean overflow? Not sure.
if (!bytesTransfered)
return;
FILE_NOTIFY_INFORMATION *notify = (FILE_NOTIFY_INFORMATION*)wd->buf;
// collect files that changed, removing duplicates
WStrVec changedFiles;
for (;;) {
WCHAR *fileName = str::DupN(notify->FileName, notify->FileNameLength / sizeof(WCHAR));
if (notify->Action == FILE_ACTION_MODIFIED) {
if (!changedFiles.Contains(fileName)) {
lf(L"ReadDirectoryChangesNotification() FILE_ACTION_MODIFIED, for '%s'", fileName);
changedFiles.Append(fileName);
fileName = NULL;
} else {
lf(L"ReadDirectoryChangesNotification() eliminating duplicate notification for '%s'", fileName);
}
} else {
lf(L"ReadDirectoryChangesNotification() action=%d, for '%s'", (int)notify->Action, fileName);
}
free(fileName);
// step to the next entry if there is one
DWORD nextOff = notify->NextEntryOffset;
if (!nextOff)
break;
notify = (FILE_NOTIFY_INFORMATION *)((char*)notify + nextOff);
}
StartMonitoringDirForChanges(wd);
for (WCHAR **f = changedFiles.IterStart(); f; f = changedFiles.IterNext()) {
NotifyAboutFile(wd, *f);
}
}