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// Copyright 2015 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 "chrome/browser/android/net/external_estimate_provider_android.h"
#include <stdint.h>
#include "base/android/context_utils.h"
#include "base/message_loop/message_loop.h"
#include "content/public/browser/browser_thread.h"
#include "jni/ExternalEstimateProviderAndroid_jni.h"
namespace chrome {
namespace android {
ExternalEstimateProviderAndroid::ExternalEstimateProviderAndroid()
: task_runner_(nullptr),
delegate_(nullptr),
weak_factory_(this) {
if (base::MessageLoop::current())
task_runner_ = base::MessageLoop::current()->task_runner();
JNIEnv* env = base::android::AttachCurrentThread();
j_external_estimate_provider_.Reset(
Java_ExternalEstimateProviderAndroid_create(
env, base::android::GetApplicationContext(),
reinterpret_cast<intptr_t>(this)));
DCHECK(!j_external_estimate_provider_.is_null());
no_value_ = Java_ExternalEstimateProviderAndroid_getNoValue(env);
net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
}
ExternalEstimateProviderAndroid::~ExternalEstimateProviderAndroid() {
DCHECK(thread_checker_.CalledOnValidThread());
net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
Java_ExternalEstimateProviderAndroid_destroy(
base::android::AttachCurrentThread(),
j_external_estimate_provider_.obj());
}
bool ExternalEstimateProviderAndroid::GetRTT(base::TimeDelta* rtt) const {
DCHECK(thread_checker_.CalledOnValidThread());
JNIEnv* env = base::android::AttachCurrentThread();
int32_t milliseconds =
Java_ExternalEstimateProviderAndroid_getRTTMilliseconds(
env, j_external_estimate_provider_.obj());
DCHECK_GE(milliseconds, no_value_);
if (milliseconds == no_value_)
return false;
*rtt = base::TimeDelta::FromMilliseconds(milliseconds);
return true;
}
bool ExternalEstimateProviderAndroid::GetDownstreamThroughputKbps(
int32_t* downstream_throughput_kbps) const {
DCHECK(thread_checker_.CalledOnValidThread());
JNIEnv* env = base::android::AttachCurrentThread();
int32_t kbps =
Java_ExternalEstimateProviderAndroid_getDownstreamThroughputKbps(
env, j_external_estimate_provider_.obj());
DCHECK_GE(kbps, no_value_);
if (kbps == no_value_)
return false;
*downstream_throughput_kbps = kbps;
return true;
}
bool ExternalEstimateProviderAndroid::GetUpstreamThroughputKbps(
int32_t* upstream_throughput_kbps) const {
DCHECK(thread_checker_.CalledOnValidThread());
JNIEnv* env = base::android::AttachCurrentThread();
int32_t kbps = Java_ExternalEstimateProviderAndroid_getUpstreamThroughputKbps(
env, j_external_estimate_provider_.obj());
DCHECK_GE(kbps, no_value_);
if (kbps == no_value_)
return false;
*upstream_throughput_kbps = kbps;
return true;
}
bool ExternalEstimateProviderAndroid::GetTimeSinceLastUpdate(
base::TimeDelta* time_since_last_update) const {
DCHECK(thread_checker_.CalledOnValidThread());
JNIEnv* env = base::android::AttachCurrentThread();
int32_t seconds =
Java_ExternalEstimateProviderAndroid_getTimeSinceLastUpdateSeconds(
env, j_external_estimate_provider_.obj());
DCHECK_GE(seconds, no_value_);
if (seconds == no_value_) {
*time_since_last_update = base::TimeDelta::Max();
return false;
}
*time_since_last_update = base::TimeDelta::FromMilliseconds(seconds);
return true;
}
void ExternalEstimateProviderAndroid::SetUpdatedEstimateDelegate(
net::ExternalEstimateProvider::UpdatedEstimateDelegate* delegate) {
delegate_ = delegate;
}
void ExternalEstimateProviderAndroid::Update() const {
DCHECK(thread_checker_.CalledOnValidThread());
JNIEnv* env = base::android::AttachCurrentThread();
Java_ExternalEstimateProviderAndroid_requestUpdate(
env, j_external_estimate_provider_.obj());
}
void ExternalEstimateProviderAndroid::OnConnectionTypeChanged(
net::NetworkChangeNotifier::ConnectionType type) {
Update();
}
void ExternalEstimateProviderAndroid::
NotifyExternalEstimateProviderAndroidUpdate(
JNIEnv* env,
const JavaParamRef<jobject>& obj) {
if (!task_runner_)
return;
// Note that creating a weak pointer is safe even on a background thread,
// because this method is called from the same critical section as the Java
// destroy() method (so this object can't be destroyed while we're in this
// method), and the factory itself isn't bound to a thread, just the weak
// pointers are (but they are bound to the thread they're *dereferenced* on,
// which is the task runner thread). Once we are outside of the critical
// section, the weak pointer will be invalidated if the object is destroyed.
task_runner_->PostTask(
FROM_HERE,
base::Bind(
&ExternalEstimateProviderAndroid::NotifyUpdatedEstimateAvailable,
weak_factory_.GetWeakPtr()));
}
void ExternalEstimateProviderAndroid::NotifyUpdatedEstimateAvailable() const {
DCHECK(thread_checker_.CalledOnValidThread());
if (delegate_)
delegate_->OnUpdatedEstimateAvailable();
}
bool RegisterExternalEstimateProviderAndroid(JNIEnv* env) {
return RegisterNativesImpl(env);
}
} // namespace android
} // namespace chrome
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