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49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_DNS_NOTIFY_WATCHER_MAC_H_
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#define NET_DNS_NOTIFY_WATCHER_MAC_H_
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#include "base/callback.h"
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#include "base/macros.h"
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#include "base/message_loop/message_loop.h"
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namespace net {
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// Watches for notifications from Libnotify and delivers them to a Callback.
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// After failure the watch is cancelled and will have to be restarted.
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class NotifyWatcherMac : public base::MessageLoopForIO::Watcher {
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public:
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// Called on received notification with true on success and false on error.
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typedef base::Callback<void(bool succeeded)> CallbackType;
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NotifyWatcherMac();
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// When deleted, automatically cancels.
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~NotifyWatcherMac() override;
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// Registers for notifications for |key|. Returns true if succeeds. If so,
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// will deliver asynchronous notifications and errors to |callback|.
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bool Watch(const char* key, const CallbackType& callback);
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// Cancels the watch.
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void Cancel();
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private:
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// MessageLoopForIO::Watcher:
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void OnFileCanReadWithoutBlocking(int fd) override;
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void OnFileCanWriteWithoutBlocking(int fd) override {}
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int notify_fd_;
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int notify_token_;
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CallbackType callback_;
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base::MessageLoopForIO::FileDescriptorWatcher watcher_;
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DISALLOW_COPY_AND_ASSIGN(NotifyWatcherMac);
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};
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} // namespace net
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#endif // NET_DNS_NOTIFY_WATCHER_MAC_H_
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