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114 lines
3.1 KiB
114 lines
3.1 KiB
/* |
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* Copyright (C) 2005 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#define LOG_TAG "misc" |
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#include <utils/misc.h> |
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#include <pthread.h> |
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#include <utils/Log.h> |
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#include <utils/Vector.h> |
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#if defined(__ANDROID__) |
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#include <dlfcn.h> |
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#include <vndksupport/linker.h> |
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#endif |
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extern "C" void do_report_sysprop_change(); |
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using namespace android; |
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namespace android { |
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struct sysprop_change_callback_info { |
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sysprop_change_callback callback; |
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int priority; |
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}; |
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#if !defined(_WIN32) |
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static pthread_mutex_t gSyspropMutex = PTHREAD_MUTEX_INITIALIZER; |
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static Vector<sysprop_change_callback_info>* gSyspropList = NULL; |
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#endif |
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void add_sysprop_change_callback(sysprop_change_callback cb, int priority) { |
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#if !defined(_WIN32) |
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pthread_mutex_lock(&gSyspropMutex); |
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if (gSyspropList == NULL) { |
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gSyspropList = new Vector<sysprop_change_callback_info>(); |
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} |
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sysprop_change_callback_info info; |
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info.callback = cb; |
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info.priority = priority; |
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bool added = false; |
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for (size_t i=0; i<gSyspropList->size(); i++) { |
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if (priority >= gSyspropList->itemAt(i).priority) { |
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gSyspropList->insertAt(info, i); |
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added = true; |
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break; |
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} |
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} |
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if (!added) { |
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gSyspropList->add(info); |
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} |
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pthread_mutex_unlock(&gSyspropMutex); |
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#endif |
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} |
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#if defined(__ANDROID__) |
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void (*get_report_sysprop_change_func())() { |
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void (*func)() = nullptr; |
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void* handle = android_load_sphal_library("libutils.so", RTLD_NOW); |
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if (handle != nullptr) { |
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func = reinterpret_cast<decltype(func)>(dlsym(handle, "do_report_sysprop_change")); |
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} |
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return func; |
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} |
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#endif |
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void report_sysprop_change() { |
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do_report_sysprop_change(); |
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#if defined(__ANDROID__) |
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// libutils.so is double loaded; from the default namespace and from the |
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// 'sphal' namespace. Redirect the sysprop change event to the other instance |
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// of libutils.so loaded in the 'sphal' namespace so that listeners attached |
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// to that instance is also notified with this event. |
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static auto func = get_report_sysprop_change_func(); |
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if (func != nullptr) { |
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(*func)(); |
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} |
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#endif |
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} |
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}; // namespace android |
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void do_report_sysprop_change() { |
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#if !defined(_WIN32) |
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pthread_mutex_lock(&gSyspropMutex); |
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Vector<sysprop_change_callback_info> listeners; |
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if (gSyspropList != NULL) { |
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listeners = *gSyspropList; |
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} |
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pthread_mutex_unlock(&gSyspropMutex); |
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//ALOGI("Reporting sysprop change to %d listeners", listeners.size()); |
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for (size_t i=0; i<listeners.size(); i++) { |
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listeners[i].callback(); |
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} |
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#endif |
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}
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