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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/network_config_watcher_mac.h"
#include <algorithm>
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
#include "base/message_loop.h"
#include "base/threading/thread.h"
#include "base/threading/thread_restrictions.h"
namespace net {
namespace {
// Called back by OS. Calls OnNetworkConfigChange().
void DynamicStoreCallback(SCDynamicStoreRef /* store */,
CFArrayRef changed_keys,
void* config_delegate) {
NetworkConfigWatcherMac::Delegate* net_config_delegate =
static_cast<NetworkConfigWatcherMac::Delegate*>(config_delegate);
net_config_delegate->OnNetworkConfigChange(changed_keys);
}
class NetworkConfigWatcherMacThread : public base::Thread {
public:
NetworkConfigWatcherMacThread(NetworkConfigWatcherMac::Delegate* delegate);
virtual ~NetworkConfigWatcherMacThread();
protected:
// base::Thread
virtual void Init() OVERRIDE;
virtual void CleanUp() OVERRIDE;
private:
// The SystemConfiguration calls in this function can lead to contention early
// on, so we invoke this function later on in startup to keep it fast.
void InitNotifications();
base::mac::ScopedCFTypeRef<CFRunLoopSourceRef> run_loop_source_;
NetworkConfigWatcherMac::Delegate* const delegate_;
base::WeakPtrFactory<NetworkConfigWatcherMacThread> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(NetworkConfigWatcherMacThread);
};
NetworkConfigWatcherMacThread::NetworkConfigWatcherMacThread(
NetworkConfigWatcherMac::Delegate* delegate)
: base::Thread("NetworkConfigWatcher"),
delegate_(delegate),
ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {}
NetworkConfigWatcherMacThread::~NetworkConfigWatcherMacThread() {
// Allow IO because Stop() calls PlatformThread::Join(), which is a blocking
// operation. This is expected during shutdown.
base::ThreadRestrictions::ScopedAllowIO allow_io;
Stop();
}
void NetworkConfigWatcherMacThread::Init() {
// Disallow IO to make sure NetworkConfigWatcherMacThread's helper thread does
// not perform blocking operations.
base::ThreadRestrictions::SetIOAllowed(false);
delegate_->Init();
// TODO(willchan): Look to see if there's a better signal for when it's ok to
// initialize this, rather than just delaying it by a fixed time.
const base::TimeDelta kInitializationDelay = base::TimeDelta::FromSeconds(1);
message_loop()->PostDelayedTask(
FROM_HERE,
base::Bind(&NetworkConfigWatcherMacThread::InitNotifications,
weak_factory_.GetWeakPtr()),
kInitializationDelay);
}
void NetworkConfigWatcherMacThread::CleanUp() {
if (!run_loop_source_.get())
return;
CFRunLoopRemoveSource(CFRunLoopGetCurrent(), run_loop_source_.get(),
kCFRunLoopCommonModes);
run_loop_source_.reset();
}
void NetworkConfigWatcherMacThread::InitNotifications() {
// Add a run loop source for a dynamic store to the current run loop.
SCDynamicStoreContext context = {
0, // Version 0.
delegate_, // User data.
NULL, // This is not reference counted. No retain function.
NULL, // This is not reference counted. No release function.
NULL, // No description for this.
};
base::mac::ScopedCFTypeRef<SCDynamicStoreRef> store(SCDynamicStoreCreate(
NULL, CFSTR("org.chromium"), DynamicStoreCallback, &context));
run_loop_source_.reset(SCDynamicStoreCreateRunLoopSource(
NULL, store.get(), 0));
CFRunLoopAddSource(CFRunLoopGetCurrent(), run_loop_source_.get(),
kCFRunLoopCommonModes);
// Set up notifications for interface and IP address changes.
delegate_->StartReachabilityNotifications();
delegate_->SetDynamicStoreNotificationKeys(store.get());
}
} // namespace
NetworkConfigWatcherMac::NetworkConfigWatcherMac(Delegate* delegate)
: notifier_thread_(new NetworkConfigWatcherMacThread(delegate)) {
// We create this notifier thread because the notification implementation
// needs a thread with a CFRunLoop, and there's no guarantee that
// MessageLoop::current() meets that criterion.
base::Thread::Options thread_options(MessageLoop::TYPE_UI, 0);
notifier_thread_->StartWithOptions(thread_options);
}
NetworkConfigWatcherMac::~NetworkConfigWatcherMac() {}
} // namespace net
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