1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "InputApplicationHandle"
18
19 #include <nativehelper/JNIHelp.h>
20 #include "core_jni_helpers.h"
21 #include "jni.h"
22 #include <android_runtime/AndroidRuntime.h>
23 #include <utils/threads.h>
24
25 #include "android_hardware_input_InputApplicationHandle.h"
26 #include "android_util_Binder.h"
27
28 namespace android {
29
30 static struct {
31 jfieldID ptr;
32 jfieldID name;
33 jfieldID dispatchingTimeoutMillis;
34 jfieldID token;
35 } gInputApplicationHandleClassInfo;
36
37 static Mutex gHandleMutex;
38
39
40 // --- NativeInputApplicationHandle ---
41
NativeInputApplicationHandle(jweak objWeak)42 NativeInputApplicationHandle::NativeInputApplicationHandle(jweak objWeak) :
43 mObjWeak(objWeak) {
44 }
45
~NativeInputApplicationHandle()46 NativeInputApplicationHandle::~NativeInputApplicationHandle() {
47 JNIEnv* env = AndroidRuntime::getJNIEnv();
48 env->DeleteWeakGlobalRef(mObjWeak);
49 }
50
getInputApplicationHandleObjLocalRef(JNIEnv * env)51 jobject NativeInputApplicationHandle::getInputApplicationHandleObjLocalRef(JNIEnv* env) {
52 return env->NewLocalRef(mObjWeak);
53 }
54
updateInfo()55 bool NativeInputApplicationHandle::updateInfo() {
56 JNIEnv* env = AndroidRuntime::getJNIEnv();
57 ScopedLocalRef<jobject> obj(env, env->NewLocalRef(mObjWeak));
58 if (!obj.get()) {
59 return false;
60 }
61 if (mInfo.token.get() != nullptr) {
62 // The java fields are immutable, so it doesn't need to update again.
63 return true;
64 }
65
66 mInfo.name = getStringField(env, obj.get(), gInputApplicationHandleClassInfo.name, "<null>");
67
68 mInfo.dispatchingTimeoutMillis =
69 env->GetLongField(obj.get(), gInputApplicationHandleClassInfo.dispatchingTimeoutMillis);
70
71 ScopedLocalRef<jobject> tokenObj(env, env->GetObjectField(obj.get(),
72 gInputApplicationHandleClassInfo.token));
73 if (tokenObj.get()) {
74 mInfo.token = ibinderForJavaObject(env, tokenObj.get());
75 } else {
76 mInfo.token.clear();
77 }
78
79 return mInfo.token.get() != nullptr;
80 }
81
82 // --- Global functions ---
83
android_view_InputApplicationHandle_getHandle(JNIEnv * env,jobject inputApplicationHandleObj)84 std::shared_ptr<InputApplicationHandle> android_view_InputApplicationHandle_getHandle(
85 JNIEnv* env, jobject inputApplicationHandleObj) {
86 if (!inputApplicationHandleObj) {
87 return NULL;
88 }
89
90 AutoMutex _l(gHandleMutex);
91 jlong ptr = env->GetLongField(inputApplicationHandleObj, gInputApplicationHandleClassInfo.ptr);
92 std::shared_ptr<NativeInputApplicationHandle>* handle;
93 if (ptr) {
94 handle = reinterpret_cast<std::shared_ptr<NativeInputApplicationHandle>*>(ptr);
95 } else {
96 jweak objWeak = env->NewWeakGlobalRef(inputApplicationHandleObj);
97 handle = new std::shared_ptr(std::make_shared<NativeInputApplicationHandle>(objWeak));
98 env->SetLongField(inputApplicationHandleObj, gInputApplicationHandleClassInfo.ptr,
99 reinterpret_cast<jlong>(handle));
100 }
101 return *handle;
102 }
103
104 // --- JNI ---
105
android_view_InputApplicationHandle_nativeDispose(JNIEnv * env,jobject obj)106 static void android_view_InputApplicationHandle_nativeDispose(JNIEnv* env, jobject obj) {
107 AutoMutex _l(gHandleMutex);
108
109 jlong ptr = env->GetLongField(obj, gInputApplicationHandleClassInfo.ptr);
110 if (ptr) {
111 env->SetLongField(obj, gInputApplicationHandleClassInfo.ptr, 0);
112
113 std::shared_ptr<NativeInputApplicationHandle>* handle =
114 reinterpret_cast<std::shared_ptr<NativeInputApplicationHandle>*>(ptr);
115 delete handle;
116 }
117 }
118
119
120 static const JNINativeMethod gInputApplicationHandleMethods[] = {
121 /* name, signature, funcPtr */
122 { "nativeDispose", "()V",
123 (void*) android_view_InputApplicationHandle_nativeDispose },
124 };
125
126 #define FIND_CLASS(var, className) \
127 var = env->FindClass(className); \
128 LOG_FATAL_IF(! (var), "Unable to find class " className);
129
130 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
131 var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
132 LOG_FATAL_IF(! (var), "Unable to find field " fieldName);
133
register_android_view_InputApplicationHandle(JNIEnv * env)134 int register_android_view_InputApplicationHandle(JNIEnv* env) {
135 int res = jniRegisterNativeMethods(env, "android/view/InputApplicationHandle",
136 gInputApplicationHandleMethods, NELEM(gInputApplicationHandleMethods));
137 (void) res; // Faked use when LOG_NDEBUG.
138 LOG_FATAL_IF(res < 0, "Unable to register native methods.");
139
140 jclass clazz;
141 FIND_CLASS(clazz, "android/view/InputApplicationHandle");
142
143 GET_FIELD_ID(gInputApplicationHandleClassInfo.ptr, clazz,
144 "ptr", "J");
145
146 GET_FIELD_ID(gInputApplicationHandleClassInfo.name, clazz,
147 "name", "Ljava/lang/String;");
148
149 GET_FIELD_ID(gInputApplicationHandleClassInfo.dispatchingTimeoutMillis, clazz,
150 "dispatchingTimeoutMillis", "J");
151
152 GET_FIELD_ID(gInputApplicationHandleClassInfo.token, clazz,
153 "token", "Landroid/os/IBinder;");
154
155 return 0;
156 }
157
158 } /* namespace android */
159