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 dispatchingTimeoutNanos;
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 jobject obj = env->NewLocalRef(mObjWeak);
58 if (!obj) {
59 return false;
60 }
61
62 mInfo.name = getStringField(env, obj, gInputApplicationHandleClassInfo.name, "<null>");
63
64 mInfo.dispatchingTimeout = env->GetLongField(obj,
65 gInputApplicationHandleClassInfo.dispatchingTimeoutNanos);
66
67 jobject tokenObj = env->GetObjectField(obj,
68 gInputApplicationHandleClassInfo.token);
69 if (tokenObj) {
70 mInfo.token = ibinderForJavaObject(env, tokenObj);
71 env->DeleteLocalRef(tokenObj);
72 } else {
73 mInfo.token.clear();
74 }
75
76 env->DeleteLocalRef(obj);
77 return mInfo.token.get() != nullptr;
78 }
79
80
81 // --- Global functions ---
82
android_view_InputApplicationHandle_getHandle(JNIEnv * env,jobject inputApplicationHandleObj)83 sp<InputApplicationHandle> android_view_InputApplicationHandle_getHandle(
84 JNIEnv* env, jobject inputApplicationHandleObj) {
85 if (!inputApplicationHandleObj) {
86 return NULL;
87 }
88
89 AutoMutex _l(gHandleMutex);
90
91 jlong ptr = env->GetLongField(inputApplicationHandleObj, gInputApplicationHandleClassInfo.ptr);
92 NativeInputApplicationHandle* handle;
93 if (ptr) {
94 handle = reinterpret_cast<NativeInputApplicationHandle*>(ptr);
95 } else {
96 jweak objWeak = env->NewWeakGlobalRef(inputApplicationHandleObj);
97 handle = new NativeInputApplicationHandle(objWeak);
98 handle->incStrong((void*)android_view_InputApplicationHandle_getHandle);
99 env->SetLongField(inputApplicationHandleObj, gInputApplicationHandleClassInfo.ptr,
100 reinterpret_cast<jlong>(handle));
101 }
102 return handle;
103 }
104
105
106 // --- JNI ---
107
android_view_InputApplicationHandle_nativeDispose(JNIEnv * env,jobject obj)108 static void android_view_InputApplicationHandle_nativeDispose(JNIEnv* env, jobject obj) {
109 AutoMutex _l(gHandleMutex);
110
111 jlong ptr = env->GetLongField(obj, gInputApplicationHandleClassInfo.ptr);
112 if (ptr) {
113 env->SetLongField(obj, gInputApplicationHandleClassInfo.ptr, 0);
114
115 NativeInputApplicationHandle* handle = reinterpret_cast<NativeInputApplicationHandle*>(ptr);
116 handle->decStrong((void*)android_view_InputApplicationHandle_getHandle);
117 }
118 }
119
120
121 static const JNINativeMethod gInputApplicationHandleMethods[] = {
122 /* name, signature, funcPtr */
123 { "nativeDispose", "()V",
124 (void*) android_view_InputApplicationHandle_nativeDispose },
125 };
126
127 #define FIND_CLASS(var, className) \
128 var = env->FindClass(className); \
129 LOG_FATAL_IF(! (var), "Unable to find class " className);
130
131 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
132 var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
133 LOG_FATAL_IF(! (var), "Unable to find field " fieldName);
134
register_android_view_InputApplicationHandle(JNIEnv * env)135 int register_android_view_InputApplicationHandle(JNIEnv* env) {
136 int res = jniRegisterNativeMethods(env, "android/view/InputApplicationHandle",
137 gInputApplicationHandleMethods, NELEM(gInputApplicationHandleMethods));
138 (void) res; // Faked use when LOG_NDEBUG.
139 LOG_FATAL_IF(res < 0, "Unable to register native methods.");
140
141 jclass clazz;
142 FIND_CLASS(clazz, "android/view/InputApplicationHandle");
143
144 GET_FIELD_ID(gInputApplicationHandleClassInfo.ptr, clazz,
145 "ptr", "J");
146
147 GET_FIELD_ID(gInputApplicationHandleClassInfo.name, clazz,
148 "name", "Ljava/lang/String;");
149
150 GET_FIELD_ID(gInputApplicationHandleClassInfo.dispatchingTimeoutNanos,
151 clazz,
152 "dispatchingTimeoutNanos", "J");
153
154 GET_FIELD_ID(gInputApplicationHandleClassInfo.token, clazz,
155 "token", "Landroid/os/IBinder;");
156
157 return 0;
158 }
159
160 } /* namespace android */
161