/* * Copyright (c) 1988 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)limits.h 5.9 (Berkeley) 4/3/91 */ #pragma once /** * @file limits.h * @brief Constants relating to implementation limits. * * This file is included via `#include_next` from the clang header of the same * name that provides all the limits that the compiler is responsible for, * primarily those relating to integer types defined by the C standard. * This file defines the additional limits defined by POSIX. */ /* * The Android build system has bionic _before_ the clang headers, * so although the claim above that clang does an `#include_next` * of this file is true for the NDK, it's not true for the OS, * and we need to paper over that difference here until/unless * the OS build changes. */ #if __has_include_next() #include_next #endif #include /* Historically bionic exposed the content of from and too. */ #include /* Many of the POSIX limits come from the kernel. */ #include /* * bionic always exposed these alternative names, * but clang's considers them GNU extensions, * and may or may not have defined them. */ #ifndef LONG_LONG_MIN /** Non-portable synonym; use LLONG_MIN directly instead. */ #define LONG_LONG_MIN LLONG_MIN #endif #ifndef LONG_LONG_MAX /** Non-portable synonym; use LLONG_MAX directly instead. */ #define LONG_LONG_MAX LLONG_MAX #endif #ifndef ULONG_LONG_MAX /** Non-portable synonym; use ULLONG_MAX directly instead. */ #define ULONG_LONG_MAX ULLONG_MAX #endif /** Maximum number of positional arguments in a printf()/scanf() format string. */ #define NL_ARGMAX 9 /** Maximum number of bytes in a $LANG name. */ #define NL_LANGMAX 14 /** Irrelevant with Android's . */ #define NL_MSGMAX 32767 /** Obsolete; removed from POSIX. */ #define NL_NMAX 1 /** Irrelevant with Android's . */ #define NL_SETMAX 255 /** Irrelevant with Android's . */ #define NL_TEXTMAX 255 /** Obsolete; removed from POSIX. */ #define PASS_MAX 128 /** Obsolete; removed from POSIX. */ #define TMP_MAX 308915776 /** Number of bits in a `long` (POSIX). */ #if __LP64__ #define LONG_BIT 64 #else #define LONG_BIT 32 #endif /** Number of bits in a "word" of `int` (POSIX). */ #define WORD_BIT 32 /** Maximum value of a uid_t. */ #define UID_MAX UINT_MAX /** Maximum value of a gid_t. */ #define GID_MAX UINT_MAX /** Maximum value of a size_t. */ #define SIZE_T_MAX ULONG_MAX /** Maximum value of a ssize_t. */ #define SSIZE_MAX LONG_MAX /** Maximum number of bytes in a multibyte character. */ #define MB_LEN_MAX 4 /** Default process priority. */ #define NZERO 20 /** Maximum number of struct iovec that can be passed in a single readv()/writev(). */ #define IOV_MAX 1024 /** Maximum value for a semaphore. */ #define SEM_VALUE_MAX 0x3fffffff /** Do not use: prefer getline() or asprintf() rather than hard-coding an arbitrary size. */ #define LINE_MAX _POSIX2_LINE_MAX /* POSIX says these belong in but BSD has some in . */ #include /** Maximum length of a hostname returned by gethostname(). */ #define HOST_NAME_MAX _POSIX_HOST_NAME_MAX /** Maximum length of a login name. */ #define LOGIN_NAME_MAX 256 /** Maximum length of terminal device name. */ #define TTY_NAME_MAX 32 /** Maximum number of attempts to destroy thread-specific data when a thread exits. */ #define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS /** * The number of calls to pthread_key_create() without intervening calls to * pthread_key_delete() that are guaranteed to succeed. See pthread_key_create() * for more details and ways to avoid hitting this limit. */ #define PTHREAD_KEYS_MAX 128 /** bionic has no fixed limit on the number of threads. */ #undef PTHREAD_THREADS_MAX