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// Copyright (c) 2010 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 <SystemConfiguration/SCDynamicStoreKey.h>
#include <SystemConfiguration/SCSchemaDefinitions.h>
#include <algorithm>
#include "base/thread.h"
// We only post tasks to a child thread we own, so we don't need refcounting.
DISABLE_RUNNABLE_METHOD_REFCOUNT(net::NetworkConfigWatcherMac);
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);
}
} // namespace
NetworkConfigWatcherMac::NetworkConfigWatcherMac(
Delegate* delegate)
: notifier_thread_(new base::Thread("NetworkConfigWatcher")),
delegate_(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);
// 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 int kNotifierThreadInitializationDelayMS = 1000;
notifier_thread_->message_loop()->PostDelayedTask(
FROM_HERE,
NewRunnableMethod(this, &NetworkConfigWatcherMac::Init),
kNotifierThreadInitializationDelayMS);
}
NetworkConfigWatcherMac::~NetworkConfigWatcherMac() {
// We don't need to explicitly Stop(), but doing so allows us to sanity-
// check that the notifier thread shut down properly.
notifier_thread_->Stop();
DCHECK(run_loop_source_ == NULL);
}
void NetworkConfigWatcherMac::WillDestroyCurrentMessageLoop() {
DCHECK(notifier_thread_ != NULL);
// We can't check the notifier_thread_'s message_loop(), as it's now 0.
// DCHECK_EQ(notifier_thread_->message_loop(), MessageLoop::current());
DCHECK(run_loop_source_ != NULL);
CFRunLoopRemoveSource(CFRunLoopGetCurrent(), run_loop_source_.get(),
kCFRunLoopCommonModes);
run_loop_source_.reset();
}
void NetworkConfigWatcherMac::Init() {
DCHECK(notifier_thread_ != NULL);
DCHECK_EQ(notifier_thread_->message_loop(), MessageLoop::current());
// Add a run loop source for a dynamic store to the current run loop.
SCDynamicStoreContext context = {
0, // Version 0.
this, // 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.
};
scoped_cftyperef<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_->SetDynamicStoreNotificationKeys(store.get());
MessageLoop::current()->AddDestructionObserver(this);
}
} // namespace net
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