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 <sys/time.h> 24 #include <utils/Endian.h> 25 26 /* get #of elements in a static array */ 27 #ifndef NELEM 28 # define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0]))) 29 #endif 30 31 namespace android { 32 33 /* 34 * Some utility functions for working with files. These could be made 35 * part of a "File" class. 36 */ 37 typedef enum FileType { 38 kFileTypeUnknown = 0, 39 kFileTypeNonexistent, // i.e. ENOENT 40 kFileTypeRegular, 41 kFileTypeDirectory, 42 kFileTypeCharDev, 43 kFileTypeBlockDev, 44 kFileTypeFifo, 45 kFileTypeSymlink, 46 kFileTypeSocket, 47 } FileType; 48 /* get the file's type; follows symlinks */ 49 FileType getFileType(const char* fileName); 50 /* get the file's modification date; returns -1 w/errno set on failure */ 51 time_t getFileModDate(const char* fileName); 52 53 typedef void (*sysprop_change_callback)(void); 54 void add_sysprop_change_callback(sysprop_change_callback cb, int priority); 55 void report_sysprop_change(); 56 57 }; // namespace android 58 59 #endif // _LIBS_UTILS_MISC_H 60
