1 /* bits/types.h -- definitions of __*_t types underlying *_t types. 2 Copyright (C) 2002-2021 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 /* 20 * Never include this file directly; use <sys/types.h> instead. 21 */ 22 23 #ifndef _BITS_TYPES_H 24 #define _BITS_TYPES_H 1 25 26 #include <features.h> 27 #include <bits/wordsize.h> 28 #include <bits/timesize.h> 29 30 /* Convenience types. */ 31 typedef unsigned char __u_char; 32 typedef unsigned short int __u_short; 33 typedef unsigned int __u_int; 34 typedef unsigned long int __u_long; 35 36 /* Fixed-size types, underlying types depend on word size and compiler. */ 37 typedef signed char __int8_t; 38 typedef unsigned char __uint8_t; 39 typedef signed short int __int16_t; 40 typedef unsigned short int __uint16_t; 41 typedef signed int __int32_t; 42 typedef unsigned int __uint32_t; 43 #if __WORDSIZE == 64 44 typedef signed long int __int64_t; 45 typedef unsigned long int __uint64_t; 46 #else 47 __extension__ typedef signed long long int __int64_t; 48 __extension__ typedef unsigned long long int __uint64_t; 49 #endif 50 51 /* Smallest types with at least a given width. */ 52 typedef __int8_t __int_least8_t; 53 typedef __uint8_t __uint_least8_t; 54 typedef __int16_t __int_least16_t; 55 typedef __uint16_t __uint_least16_t; 56 typedef __int32_t __int_least32_t; 57 typedef __uint32_t __uint_least32_t; 58 typedef __int64_t __int_least64_t; 59 typedef __uint64_t __uint_least64_t; 60 61 /* quad_t is also 64 bits. */ 62 #if __WORDSIZE == 64 63 typedef long int __quad_t; 64 typedef unsigned long int __u_quad_t; 65 #else 66 __extension__ typedef long long int __quad_t; 67 __extension__ typedef unsigned long long int __u_quad_t; 68 #endif 69 70 /* Largest integral types. */ 71 #if __WORDSIZE == 64 72 typedef long int __intmax_t; 73 typedef unsigned long int __uintmax_t; 74 #else 75 __extension__ typedef long long int __intmax_t; 76 __extension__ typedef unsigned long long int __uintmax_t; 77 #endif 78 79 80 /* The machine-dependent file <bits/typesizes.h> defines __*_T_TYPE 81 macros for each of the OS types we define below. The definitions 82 of those macros must use the following macros for underlying types. 83 We define __S<SIZE>_TYPE and __U<SIZE>_TYPE for the signed and unsigned 84 variants of each of the following integer types on this machine. 85 86 16 -- "natural" 16-bit type (always short) 87 32 -- "natural" 32-bit type (always int) 88 64 -- "natural" 64-bit type (long or long long) 89 LONG32 -- 32-bit type, traditionally long 90 QUAD -- 64-bit type, traditionally long long 91 WORD -- natural type of __WORDSIZE bits (int or long) 92 LONGWORD -- type of __WORDSIZE bits, traditionally long 93 94 We distinguish WORD/LONGWORD, 32/LONG32, and 64/QUAD so that the 95 conventional uses of `long' or `long long' type modifiers match the 96 types we define, even when a less-adorned type would be the same size. 97 This matters for (somewhat) portably writing printf/scanf formats for 98 these types, where using the appropriate l or ll format modifiers can 99 make the typedefs and the formats match up across all GNU platforms. If 100 we used `long' when it's 64 bits where `long long' is expected, then the 101 compiler would warn about the formats not matching the argument types, 102 and the programmer changing them to shut up the compiler would break the 103 program's portability. 104 105 Here we assume what is presently the case in all the GCC configurations 106 we support: long long is always 64 bits, long is always word/address size, 107 and int is always 32 bits. */ 108 109 #define __S16_TYPE short int 110 #define __U16_TYPE unsigned short int 111 #define __S32_TYPE int 112 #define __U32_TYPE unsigned int 113 #define __SLONGWORD_TYPE long int 114 #define __ULONGWORD_TYPE unsigned long int 115 #if __WORDSIZE == 32 116 # define __SQUAD_TYPE __int64_t 117 # define __UQUAD_TYPE __uint64_t 118 # define __SWORD_TYPE int 119 # define __UWORD_TYPE unsigned int 120 # define __SLONG32_TYPE long int 121 # define __ULONG32_TYPE unsigned long int 122 # define __S64_TYPE __int64_t 123 # define __U64_TYPE __uint64_t 124 /* We want __extension__ before typedef's that use nonstandard base types 125 such as `long long' in C89 mode. */ 126 # define __STD_TYPE __extension__ typedef 127 #elif __WORDSIZE == 64 128 # define __SQUAD_TYPE long int 129 # define __UQUAD_TYPE unsigned long int 130 # define __SWORD_TYPE long int 131 # define __UWORD_TYPE unsigned long int 132 # define __SLONG32_TYPE int 133 # define __ULONG32_TYPE unsigned int 134 # define __S64_TYPE long int 135 # define __U64_TYPE unsigned long int 136 /* No need to mark the typedef with __extension__. */ 137 # define __STD_TYPE typedef 138 #else 139 # error 140 #endif 141 #include <bits/typesizes.h> /* Defines __*_T_TYPE macros. */ 142 #include <bits/time64.h> /* Defines __TIME*_T_TYPE macros. */ 143 144 145 __STD_TYPE __DEV_T_TYPE __dev_t; /* Type of device numbers. */ 146 __STD_TYPE __UID_T_TYPE __uid_t; /* Type of user identifications. */ 147 __STD_TYPE __GID_T_TYPE __gid_t; /* Type of group identifications. */ 148 __STD_TYPE __INO_T_TYPE __ino_t; /* Type of file serial numbers. */ 149 __STD_TYPE __INO64_T_TYPE __ino64_t; /* Type of file serial numbers (LFS).*/ 150 __STD_TYPE __MODE_T_TYPE __mode_t; /* Type of file attribute bitmasks. */ 151 __STD_TYPE __NLINK_T_TYPE __nlink_t; /* Type of file link counts. */ 152 __STD_TYPE __OFF_T_TYPE __off_t; /* Type of file sizes and offsets. */ 153 __STD_TYPE __OFF64_T_TYPE __off64_t; /* Type of file sizes and offsets (LFS). */ 154 __STD_TYPE __PID_T_TYPE __pid_t; /* Type of process identifications. */ 155 __STD_TYPE __FSID_T_TYPE __fsid_t; /* Type of file system IDs. */ 156 __STD_TYPE __CLOCK_T_TYPE __clock_t; /* Type of CPU usage counts. */ 157 __STD_TYPE __RLIM_T_TYPE __rlim_t; /* Type for resource measurement. */ 158 __STD_TYPE __RLIM64_T_TYPE __rlim64_t; /* Type for resource measurement (LFS). */ 159 __STD_TYPE __ID_T_TYPE __id_t; /* General type for IDs. */ 160 __STD_TYPE __TIME_T_TYPE __time_t; /* Seconds since the Epoch. */ 161 __STD_TYPE __USECONDS_T_TYPE __useconds_t; /* Count of microseconds. */ 162 __STD_TYPE __SUSECONDS_T_TYPE __suseconds_t; /* Signed count of microseconds. */ 163 __STD_TYPE __SUSECONDS64_T_TYPE __suseconds64_t; 164 165 __STD_TYPE __DADDR_T_TYPE __daddr_t; /* The type of a disk address. */ 166 __STD_TYPE __KEY_T_TYPE __key_t; /* Type of an IPC key. */ 167 168 /* Clock ID used in clock and timer functions. */ 169 __STD_TYPE __CLOCKID_T_TYPE __clockid_t; 170 171 /* Timer ID returned by `timer_create'. */ 172 __STD_TYPE __TIMER_T_TYPE __timer_t; 173 174 /* Type to represent block size. */ 175 __STD_TYPE __BLKSIZE_T_TYPE __blksize_t; 176 177 /* Types from the Large File Support interface. */ 178 179 /* Type to count number of disk blocks. */ 180 __STD_TYPE __BLKCNT_T_TYPE __blkcnt_t; 181 __STD_TYPE __BLKCNT64_T_TYPE __blkcnt64_t; 182 183 /* Type to count file system blocks. */ 184 __STD_TYPE __FSBLKCNT_T_TYPE __fsblkcnt_t; 185 __STD_TYPE __FSBLKCNT64_T_TYPE __fsblkcnt64_t; 186 187 /* Type to count file system nodes. */ 188 __STD_TYPE __FSFILCNT_T_TYPE __fsfilcnt_t; 189 __STD_TYPE __FSFILCNT64_T_TYPE __fsfilcnt64_t; 190 191 /* Type of miscellaneous file system fields. */ 192 __STD_TYPE __FSWORD_T_TYPE __fsword_t; 193 194 __STD_TYPE __SSIZE_T_TYPE __ssize_t; /* Type of a byte count, or error. */ 195 196 /* Signed long type used in system calls. */ 197 __STD_TYPE __SYSCALL_SLONG_TYPE __syscall_slong_t; 198 /* Unsigned long type used in system calls. */ 199 __STD_TYPE __SYSCALL_ULONG_TYPE __syscall_ulong_t; 200 201 /* These few don't really vary by system, they always correspond 202 to one of the other defined types. */ 203 typedef __off64_t __loff_t; /* Type of file sizes and offsets (LFS). */ 204 typedef char *__caddr_t; 205 206 /* Duplicates info from stdint.h but this is used in unistd.h. */ 207 __STD_TYPE __SWORD_TYPE __intptr_t; 208 209 /* Duplicate info from sys/socket.h. */ 210 __STD_TYPE __U32_TYPE __socklen_t; 211 212 /* C99: An integer type that can be accessed as an atomic entity, 213 even in the presence of asynchronous interrupts. 214 It is not currently necessary for this to be machine-specific. */ 215 typedef int __sig_atomic_t; 216 217 /* Seconds since the Epoch, visible to user code when time_t is too 218 narrow only for consistency with the old way of widening too-narrow 219 types. User code should never use __time64_t. */ 220 #if __TIMESIZE == 64 && defined __LIBC 221 # define __time64_t __time_t 222 #elif __TIMESIZE != 64 223 __STD_TYPE __TIME64_T_TYPE __time64_t; 224 #endif 225 226 #undef __STD_TYPE 227 228 #endif /* bits/types.h */ 229