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/*
* Copyright (C) 2005 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "misc"
//
// Miscellaneous utility functions.
//
#include <utils/misc.h>
#include <utils/Log.h>
#include <sys/stat.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#if defined(HAVE_PTHREADS)
# include <pthread.h>
#endif
#include <utils/Vector.h>
using namespace android;
namespace android {
struct sysprop_change_callback_info {
sysprop_change_callback callback;
int priority;
};
#if defined(HAVE_PTHREADS)
static pthread_mutex_t gSyspropMutex = PTHREAD_MUTEX_INITIALIZER;
static Vector<sysprop_change_callback_info>* gSyspropList = NULL;
#endif
void add_sysprop_change_callback(sysprop_change_callback cb, int priority) {
#if defined(HAVE_PTHREADS)
pthread_mutex_lock(&gSyspropMutex);
if (gSyspropList == NULL) {
gSyspropList = new Vector<sysprop_change_callback_info>();
}
sysprop_change_callback_info info;
info.callback = cb;
info.priority = priority;
bool added = false;
for (size_t i=0; i<gSyspropList->size(); i++) {
if (priority >= gSyspropList->itemAt(i).priority) {
gSyspropList->insertAt(info, i);
added = true;
break;
}
}
if (!added) {
gSyspropList->add(info);
}
pthread_mutex_unlock(&gSyspropMutex);
#endif
}
void report_sysprop_change() {
#if defined(HAVE_PTHREADS)
pthread_mutex_lock(&gSyspropMutex);
Vector<sysprop_change_callback_info> listeners;
if (gSyspropList != NULL) {
listeners = *gSyspropList;
}
pthread_mutex_unlock(&gSyspropMutex);
//ALOGI("Reporting sysprop change to %d listeners", listeners.size());
for (size_t i=0; i<listeners.size(); i++) {
listeners[i].callback();
}
#endif
}
}; // namespace android
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