/**************************************************************************** * include/sys/types.h * * Copyright (C) 2007-2009, 2011-2012, 2014-2015 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <gnutt@nuttx.org> * * 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 NuttX 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 COPYRIGHT HOLDERS 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 * COPYRIGHT OWNER 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. * ****************************************************************************/ #ifndef __INCLUDE_SYS_TYPES_H #define __INCLUDE_SYS_TYPES_H /**************************************************************************** * Included Files ****************************************************************************/ #include <nuttx/config.h> #include <nuttx/compiler.h> #ifndef __ASSEMBLY__ # include <stdint.h> #endif /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Alternative values for type bool (for historic reasons) */ #ifndef TRUE # define TRUE 1 #endif #ifndef FALSE # define FALSE 0 #endif /* NULL is usually defined in stddef.h (which includes this file) */ #ifndef NULL /* SDCC is sensitive to NULL pointer type conversions, and C++ defines * NULL as zero */ # if defined(SDCC) || defined(__SDCC) || defined(__cplusplus) # define NULL (0) # else # define NULL ((void*)0) # endif #endif /* POSIX-like OS return values: */ #if !defined(__cplusplus) # undef ERROR # define ERROR -1 #endif #undef OK #define OK 0 /* Scheduling Priorities. * * NOTES: * - Only the idle task can take the true minimum priority. * - These definitions are non-standard internal definitions and, for * portability reasons, should not be used by application software. */ #define SCHED_PRIORITY_MAX 255 #define SCHED_PRIORITY_DEFAULT 100 #define SCHED_PRIORITY_MIN 1 #define SCHED_PRIORITY_IDLE 0 /**************************************************************************** * Type Declarations ****************************************************************************/ #ifndef __ASSEMBLY__ /* Floating point types */ typedef float float32; #ifndef CONFIG_HAVE_DOUBLE typedef float double_t; typedef float float64; #else typedef double double_t; typedef double float64; #endif /* Misc. scalar types */ /* mode_t is an integer type used for file attributes. mode_t needs * to be at least 16-bits but, in fact, must be sizeof(int) because it is * passed via varargs. */ typedef unsigned int mode_t; /* size_t is used for sizes of memory objects. * ssize_t is used for a count of bytes or an error indication. * * See also definitions of SIZE_MAX et al in limits.h. * * REVISIT: size_t belongs in stddef.h */ #ifdef CONFIG_SMALL_MEMORY typedef uint16_t size_t; typedef int16_t ssize_t; typedef uint16_t rsize_t; #else /* CONFIG_SMALL_MEMORY */ typedef _size_t size_t; typedef _ssize_t ssize_t; typedef _size_t rsize_t; #endif /* CONFIG_SMALL_MEMORY */ /* uid_t is used for user IDs * gid_t is used for group IDs. */ typedef int16_t uid_t; typedef int16_t gid_t; /* dev_t is used for device IDs */ typedef uint16_t dev_t; /* ino_t is used for file serial numbers */ typedef uint16_t ino_t; /* nlink_t is used for link counts */ typedef uint16_t nlink_t; /* pid_t is used for process IDs and process group IDs. It must be signed because * negative PID values are used to represent invalid PIDs. */ typedef int16_t pid_t; /* id_t is a general identifier that can be used to contain at least a pid_t, * uid_t, or gid_t. */ typedef int16_t id_t; /* Unix requires a key of type key_t defined in file sys/types.h for requesting * resources such as shared memory segments, message queues and semaphores. A key * is simply an integer of type key_t */ typedef int16_t key_t; /* Signed integral type of the result of subtracting two pointers */ typedef intptr_t ptrdiff_t; #ifndef CONFIG_WCHAR_BUILTIN /* Wide, 16-bit character types. wchar_t is a built-in type in C++ and * its declaration here may cause compilation errors on some compilers * if -DCONFIG_WCHAR_BUILTIN is not included in the CXXFLAGS. * * REVISIT: wchar_t belongs in stddef.h */ typedef uint16_t wchar_t; #endif /* wint_t * An integral type capable of storing any valid value of wchar_t, or WEOF. */ typedef int wint_t; /* wctype_t * A scalar type of a data object that can hold values which represent * locale-specific character classification. */ typedef int wctype_t; /* blkcnt_t and off_t are signed integer types. * * blkcnt_t is used for file block counts. * off_t is used for file offsets and sizes. * fpos_t is used for file positions. * * Hence, all should be independent of processor architecture. */ typedef uint32_t blkcnt_t; typedef int32_t off_t; typedef off_t fpos_t; #ifdef CONFIG_HAVE_LONG_LONG /* Large file versions */ typedef int64_t off64_t; typedef int64_t fpos64_t; #endif /* blksize_t is a signed integer value used for file block sizes */ typedef int16_t blksize_t; /* Network related */ typedef unsigned int socklen_t; typedef uint16_t sa_family_t; /* Used for system times in clock ticks. This type is the natural width of * the system timer. * * NOTE: The signed-ness of clock_t is not specified at OpenGroup.org. An * unsigned type is used to support the full range of the internal clock. */ #ifdef CONFIG_SYSTEM_TIME64 typedef uint64_t clock_t; #else typedef uint32_t clock_t; #endif /* The type useconds_t shall be an unsigned integer type capable of storing * values at least in the range [0, 1000000]. The type suseconds_t shall be * a signed integer type capable of storing values at least in the range * [-1, 1000000]. */ typedef uint32_t useconds_t; typedef int32_t suseconds_t; #ifdef CONFIG_SMP /* This is the smallest integer type that will hold a bitset of all CPUs */ #if (CONFIG_SMP_NCPUS <= 8) typedef volatile uint8_t cpu_set_t; #elif (CONFIG_SMP_NCPUS <= 16) typedef volatile uint16_t cpu_set_t; #elif (CONFIG_SMP_NCPUS <= 32) typedef volatile uint32_t cpu_set_t; #else # error SMP: Extensions needed to support this number of CPUs #endif #else typedef volatile uint8_t cpu_set_t; #endif /* CONFIG_SMP */ /* BSD types provided only to support porting to NuttX. */ typedef unsigned char u_char; typedef unsigned short u_short; typedef unsigned int u_int; typedef unsigned long u_long; /* SYSV types provided only to support porting to NuttX. */ typedef unsigned char unchar; typedef unsigned short ushort; typedef unsigned int uint; typedef unsigned long ulong; typedef signed char s_char; typedef FAR char *caddr_t; /* Task entry point */ typedef CODE int (*main_t)(int argc, FAR char *argv[]); #endif /* __ASSEMBLY__ */ /**************************************************************************** * Public Function Prototypes ****************************************************************************/ #endif /* __INCLUDE_SYS_TYPES_H */