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 // 18 // Handy utility functions and portability code. 19 // 20 #ifndef _LIBS_UTILS_MISC_H 21 #define _LIBS_UTILS_MISC_H 22 23 #include <utils/Endian.h> 24 25 /* get #of elements in a static array 26 * DO NOT USE: please use std::vector/std::array instead 27 */ 28 #ifndef NELEM 29 # define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0]))) 30 #endif 31 32 namespace android { 33 34 typedef void (*sysprop_change_callback)(void); 35 void add_sysprop_change_callback(sysprop_change_callback cb, int priority); 36 void report_sysprop_change(); 37 38 } // namespace android 39 40 #endif // _LIBS_UTILS_MISC_H 41