com_android_server_InputApplicationHandle.cpp revision a924dc0db952fe32509435fdb8dc9c84a9e181f3 
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 "JNIHelp.h"
20#include "jni.h"
21#include <android_runtime/AndroidRuntime.h>
22#include <utils/threads.h>
23
24#include "com_android_server_InputApplicationHandle.h"
25
26namespace android {
27
28static struct {
29    jclass clazz;
30
31    jfieldID ptr;
32} gInputApplicationHandleClassInfo;
33
34static Mutex gHandleMutex;
35
36
37// --- NativeInputApplicationHandle ---
38
39NativeInputApplicationHandle::NativeInputApplicationHandle(jweak objWeak) :
40        mObjWeak(objWeak) {
41}
42
43NativeInputApplicationHandle::~NativeInputApplicationHandle() {
44    JNIEnv* env = AndroidRuntime::getJNIEnv();
45    env->DeleteWeakGlobalRef(mObjWeak);
46}
47
48jobject NativeInputApplicationHandle::getInputApplicationHandleObjLocalRef(JNIEnv* env) {
49    return env->NewLocalRef(mObjWeak);
50}
51
52
53// --- Global functions ---
54
55sp<InputApplicationHandle> android_server_InputApplicationHandle_getHandle(
56        JNIEnv* env, jobject inputApplicationHandleObj) {
57    if (!inputApplicationHandleObj) {
58        return NULL;
59    }
60
61    AutoMutex _l(gHandleMutex);
62
63    int ptr = env->GetIntField(inputApplicationHandleObj, gInputApplicationHandleClassInfo.ptr);
64    NativeInputApplicationHandle* handle;
65    if (ptr) {
66        handle = reinterpret_cast<NativeInputApplicationHandle*>(ptr);
67    } else {
68        jweak objWeak = env->NewWeakGlobalRef(inputApplicationHandleObj);
69        handle = new NativeInputApplicationHandle(objWeak);
70        handle->incStrong(inputApplicationHandleObj);
71        env->SetIntField(inputApplicationHandleObj, gInputApplicationHandleClassInfo.ptr,
72                reinterpret_cast<int>(handle));
73    }
74    return handle;
75}
76
77
78// --- JNI ---
79
80static void android_server_InputApplicationHandle_nativeDispose(JNIEnv* env, jobject obj) {
81    AutoMutex _l(gHandleMutex);
82
83    int ptr = env->GetIntField(obj, gInputApplicationHandleClassInfo.ptr);
84    if (ptr) {
85        env->SetIntField(obj, gInputApplicationHandleClassInfo.ptr, 0);
86
87        NativeInputApplicationHandle* handle = reinterpret_cast<NativeInputApplicationHandle*>(ptr);
88        handle->decStrong(obj);
89    }
90}
91
92
93static JNINativeMethod gInputApplicationHandleMethods[] = {
94    /* name, signature, funcPtr */
95    { "nativeDispose", "()V",
96            (void*) android_server_InputApplicationHandle_nativeDispose },
97};
98
99#define FIND_CLASS(var, className) \
100        var = env->FindClass(className); \
101        LOG_FATAL_IF(! var, "Unable to find class " className); \
102        var = jclass(env->NewGlobalRef(var));
103
104#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
105        var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
106        LOG_FATAL_IF(! var, "Unable to find field " fieldName);
107
108int register_android_server_InputApplicationHandle(JNIEnv* env) {
109    int res = jniRegisterNativeMethods(env, "com/android/server/wm/InputApplicationHandle",
110            gInputApplicationHandleMethods, NELEM(gInputApplicationHandleMethods));
111    LOG_FATAL_IF(res < 0, "Unable to register native methods.");
112
113    FIND_CLASS(gInputApplicationHandleClassInfo.clazz, "com/android/server/wm/InputApplicationHandle");
114
115    GET_FIELD_ID(gInputApplicationHandleClassInfo.ptr, gInputApplicationHandleClassInfo.clazz,
116            "ptr", "I");
117
118    return 0;
119}
120
121} /* namespace android */
122