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Side by Side Diff: mojo/android/system/watcher_impl.cc

Issue 2725133002: Mojo: Armed Watchers (Closed)
Patch Set: . Created 3 years, 9 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved. 1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "mojo/android/system/watcher_impl.h" 5 #include "mojo/android/system/watcher_impl.h"
6 6
7 #include <stddef.h> 7 #include <stddef.h>
8 #include <stdint.h> 8 #include <stdint.h>
9 9
10 #include "base/android/base_jni_registrar.h" 10 #include "base/android/base_jni_registrar.h"
11 #include "base/android/jni_android.h" 11 #include "base/android/jni_android.h"
12 #include "base/android/jni_registrar.h" 12 #include "base/android/jni_registrar.h"
13 #include "base/android/library_loader/library_loader_hooks.h" 13 #include "base/android/library_loader/library_loader_hooks.h"
14 #include "base/android/scoped_java_ref.h" 14 #include "base/android/scoped_java_ref.h"
15 #include "base/bind.h" 15 #include "base/bind.h"
16 #include "jni/WatcherImpl_jni.h" 16 #include "jni/WatcherImpl_jni.h"
17 #include "mojo/public/cpp/system/handle.h" 17 #include "mojo/public/cpp/system/handle.h"
18 #include "mojo/public/cpp/system/watcher.h" 18 #include "mojo/public/cpp/system/simple_watcher.h"
19 19
20 namespace mojo { 20 namespace mojo {
21 namespace android { 21 namespace android {
22 22
23 using base::android::JavaParamRef; 23 using base::android::JavaParamRef;
24 24
25 namespace { 25 namespace {
26 26
27 class WatcherImpl { 27 class WatcherImpl {
28 public: 28 public:
29 WatcherImpl() : watcher_(FROM_HERE) {} 29 WatcherImpl() : watcher_(FROM_HERE, SimpleWatcher::ArmingPolicy::AUTOMATIC) {}
30 30
31 ~WatcherImpl() = default; 31 ~WatcherImpl() = default;
32 32
33 jint Start(JNIEnv* env, 33 jint Start(JNIEnv* env,
34 const JavaParamRef<jobject>& jcaller, 34 const JavaParamRef<jobject>& jcaller,
35 jint mojo_handle, 35 jint mojo_handle,
36 jint signals) { 36 jint signals) {
37 java_watcher_.Reset(env, jcaller); 37 java_watcher_.Reset(env, jcaller);
38 38
39 auto ready_callback = 39 auto ready_callback =
40 base::Bind(&WatcherImpl::OnHandleReady, base::Unretained(this)); 40 base::Bind(&WatcherImpl::OnHandleReady, base::Unretained(this));
41 41
42 MojoResult result = 42 MojoResult result =
43 watcher_.Start(mojo::Handle(static_cast<MojoHandle>(mojo_handle)), 43 watcher_.Watch(mojo::Handle(static_cast<MojoHandle>(mojo_handle)),
44 static_cast<MojoHandleSignals>(signals), ready_callback); 44 static_cast<MojoHandleSignals>(signals), ready_callback);
45
46 if (result != MOJO_RESULT_OK) 45 if (result != MOJO_RESULT_OK)
47 java_watcher_.Reset(); 46 java_watcher_.Reset();
48 47
49 return result; 48 return result;
50 } 49 }
51 50
52 void Cancel() { 51 void Cancel() {
53 java_watcher_.Reset(); 52 java_watcher_.Reset();
54 watcher_.Cancel(); 53 watcher_.Cancel();
55 } 54 }
56 55
57 private: 56 private:
58 void OnHandleReady(MojoResult result) { 57 void OnHandleReady(MojoResult result) {
59 DCHECK(!java_watcher_.is_null()); 58 DCHECK(!java_watcher_.is_null());
60 59
61 base::android::ScopedJavaGlobalRef<jobject> java_watcher_preserver; 60 base::android::ScopedJavaGlobalRef<jobject> java_watcher_preserver;
62 if (result == MOJO_RESULT_CANCELLED) 61 if (result == MOJO_RESULT_CANCELLED)
63 java_watcher_preserver = std::move(java_watcher_); 62 java_watcher_preserver = std::move(java_watcher_);
64 63
65 Java_WatcherImpl_onHandleReady( 64 Java_WatcherImpl_onHandleReady(
66 base::android::AttachCurrentThread(), 65 base::android::AttachCurrentThread(),
67 java_watcher_.is_null() ? java_watcher_preserver : java_watcher_, 66 java_watcher_.is_null() ? java_watcher_preserver : java_watcher_,
68 result); 67 result);
69 } 68 }
70 69
71 Watcher watcher_; 70 SimpleWatcher watcher_;
72 base::android::ScopedJavaGlobalRef<jobject> java_watcher_; 71 base::android::ScopedJavaGlobalRef<jobject> java_watcher_;
73 72
74 DISALLOW_COPY_AND_ASSIGN(WatcherImpl); 73 DISALLOW_COPY_AND_ASSIGN(WatcherImpl);
75 }; 74 };
76 75
77 } // namespace 76 } // namespace
78 77
79 static jlong CreateWatcher(JNIEnv* env, const JavaParamRef<jobject>& jcaller) { 78 static jlong CreateWatcher(JNIEnv* env, const JavaParamRef<jobject>& jcaller) {
80 return reinterpret_cast<jlong>(new WatcherImpl); 79 return reinterpret_cast<jlong>(new WatcherImpl);
81 } 80 }
(...skipping 18 matching lines...) Expand all
100 jlong watcher_ptr) { 99 jlong watcher_ptr) {
101 delete reinterpret_cast<WatcherImpl*>(watcher_ptr); 100 delete reinterpret_cast<WatcherImpl*>(watcher_ptr);
102 } 101 }
103 102
104 bool RegisterWatcherImpl(JNIEnv* env) { 103 bool RegisterWatcherImpl(JNIEnv* env) {
105 return RegisterNativesImpl(env); 104 return RegisterNativesImpl(env);
106 } 105 }
107 106
108 } // namespace android 107 } // namespace android
109 } // namespace mojo 108 } // namespace mojo
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