1/*
2 * Copyright (C) 2005 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 "misc"
18
19//
20// Miscellaneous utility functions.
21//
22#include <utils/misc.h>
23#include <utils/Log.h>
24
25#include <sys/stat.h>
26#include <string.h>
27#include <stdio.h>
28
29#if !defined(_WIN32)
30# include <pthread.h>
31#endif
32
33#include <utils/Vector.h>
34
35using namespace android;
36
37namespace android {
38
39struct sysprop_change_callback_info {
40    sysprop_change_callback callback;
41    int priority;
42};
43
44#if !defined(_WIN32)
45static pthread_mutex_t gSyspropMutex = PTHREAD_MUTEX_INITIALIZER;
46static Vector<sysprop_change_callback_info>* gSyspropList = NULL;
47#endif
48
49void add_sysprop_change_callback(sysprop_change_callback cb, int priority) {
50#if !defined(_WIN32)
51    pthread_mutex_lock(&gSyspropMutex);
52    if (gSyspropList == NULL) {
53        gSyspropList = new Vector<sysprop_change_callback_info>();
54    }
55    sysprop_change_callback_info info;
56    info.callback = cb;
57    info.priority = priority;
58    bool added = false;
59    for (size_t i=0; i<gSyspropList->size(); i++) {
60        if (priority >= gSyspropList->itemAt(i).priority) {
61            gSyspropList->insertAt(info, i);
62            added = true;
63            break;
64        }
65    }
66    if (!added) {
67        gSyspropList->add(info);
68    }
69    pthread_mutex_unlock(&gSyspropMutex);
70#endif
71}
72
73void report_sysprop_change() {
74#if !defined(_WIN32)
75    pthread_mutex_lock(&gSyspropMutex);
76    Vector<sysprop_change_callback_info> listeners;
77    if (gSyspropList != NULL) {
78        listeners = *gSyspropList;
79    }
80    pthread_mutex_unlock(&gSyspropMutex);
81
82    //ALOGI("Reporting sysprop change to %d listeners", listeners.size());
83    for (size_t i=0; i<listeners.size(); i++) {
84        listeners[i].callback();
85    }
86#endif
87}
88
89}; // namespace android
90