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105 lines
3.0 KiB
105 lines
3.0 KiB
7 months ago
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// Copyright 2016 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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#include <stddef.h>
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#include <stdint.h>
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#include "base/android/jni_android.h"
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#include "base/android/scoped_java_ref.h"
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#include "base/bind.h"
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#include "jni/WatcherImpl_jni.h"
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#include "mojo/public/cpp/system/handle.h"
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#include "mojo/public/cpp/system/simple_watcher.h"
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namespace mojo {
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namespace android {
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using base::android::JavaParamRef;
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namespace {
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class WatcherImpl {
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public:
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WatcherImpl()
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: watcher_(FROM_HERE,
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SimpleWatcher::ArmingPolicy::AUTOMATIC,
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base::SequencedTaskRunnerHandle::Get()) {}
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~WatcherImpl() = default;
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jint Start(JNIEnv* env,
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const JavaParamRef<jobject>& jcaller,
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jint mojo_handle,
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jint signals) {
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java_watcher_.Reset(env, jcaller);
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auto ready_callback = base::BindRepeating(&WatcherImpl::OnHandleReady,
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base::Unretained(this));
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MojoResult result =
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watcher_.Watch(mojo::Handle(static_cast<MojoHandle>(mojo_handle)),
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static_cast<MojoHandleSignals>(signals), ready_callback);
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if (result != MOJO_RESULT_OK)
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java_watcher_.Reset();
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return result;
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}
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void Cancel() {
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java_watcher_.Reset();
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watcher_.Cancel();
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}
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private:
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void OnHandleReady(MojoResult result) {
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DCHECK(!java_watcher_.is_null());
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base::android::ScopedJavaGlobalRef<jobject> java_watcher_preserver;
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if (result == MOJO_RESULT_CANCELLED)
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java_watcher_preserver = std::move(java_watcher_);
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Java_WatcherImpl_onHandleReady(
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base::android::AttachCurrentThread(),
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java_watcher_.is_null() ? java_watcher_preserver : java_watcher_,
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result);
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}
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SimpleWatcher watcher_;
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base::android::ScopedJavaGlobalRef<jobject> java_watcher_;
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DISALLOW_COPY_AND_ASSIGN(WatcherImpl);
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};
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} // namespace
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static jlong JNI_WatcherImpl_CreateWatcher(
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JNIEnv* env,
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const JavaParamRef<jobject>& jcaller) {
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return reinterpret_cast<jlong>(new WatcherImpl);
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}
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static jint JNI_WatcherImpl_Start(JNIEnv* env,
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const JavaParamRef<jobject>& jcaller,
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jlong watcher_ptr,
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jint mojo_handle,
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jint signals) {
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auto* watcher = reinterpret_cast<WatcherImpl*>(watcher_ptr);
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return watcher->Start(env, jcaller, mojo_handle, signals);
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}
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static void JNI_WatcherImpl_Cancel(JNIEnv* env,
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const JavaParamRef<jobject>& jcaller,
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jlong watcher_ptr) {
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reinterpret_cast<WatcherImpl*>(watcher_ptr)->Cancel();
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}
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static void JNI_WatcherImpl_Delete(JNIEnv* env,
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const JavaParamRef<jobject>& jcaller,
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jlong watcher_ptr) {
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delete reinterpret_cast<WatcherImpl*>(watcher_ptr);
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}
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} // namespace android
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} // namespace mojo
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