/* Subscribe for notifications about file changes. When a file changes, we'll
call observer->OnFileChanged().
We take ownership of observer object.
Returns a cancellation token that can be used in FileWatcherUnsubscribe(). That
way we can support multiple callers subscribing to the same file.
*/
WatchedFile* FileWatcherSubscribe(const WCHAR* path, const std::function<void()>& onFileChangedCb) {
lf(L"FileWatcherSubscribe() path: %s", path);
if (!file::Exists(path)) {
return nullptr;
}
StartThreadIfNecessary();
ScopedCritSec cs(&g_threadCritSec);
return NewWatchedFile(path, onFileChangedCb);
}
/* Subscribe for notifications about file changes. When a file changes, we'll
call observer->OnFileChanged(). We take ownership of observer object.
Returns a cancellation token that can be used in FileWatcherUnsubscribe(). That
way we can support multiple callers subscribing for the same file.
*/
FileWatcherToken FileWatcherSubscribe(const WCHAR *path, FileChangeObserver *observer)
{
if (!file::Exists(path)) {
delete observer;
return INVALID_TOKEN;
}
// TODO: if the file is on a network drive we should periodically check
// it ourselves, because ReadDirectoryChangesW()
// doesn't work in that case
WatchedFile *wf = NewWatchedFile(path, observer);
return wf->token;
}
/* Subscribe for notifications about file changes. When a file changes, we'll
call observer->OnFileChanged().
We take ownership of observer object.
Returns a cancellation token that can be used in FileWatcherUnsubscribe(). That
way we can support multiple callers subscribing to the same file.
*/
WatchedFile *FileWatcherSubscribe(const WCHAR *path, FileChangeObserver *observer)
{
CrashIf(!observer);
lf(L"FileWatcherSubscribe() path: %s", path);
if (!file::Exists(path)) {
delete observer;
return nullptr;
}
StartThreadIfNecessary();
ScopedCritSec cs(&g_threadCritSec);
return NewWatchedFile(path, observer);
}
