text: /****************************************************************************
   * 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(__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
  
  /* HPUX-like MIN/MAX value */
  
  #define PRIOR_RR_MIN      0
  #define PRIOR_RR_MAX    255
  #define PRIOR_FIFO_MIN    0
  #define PRIOR_FIFO_MAX  255
  #define PRIOR_OTHER_MIN   0
  #define PRIOR_OTHER_MAX 255
  
  /* Scheduling Priorities.  NOTE:  Only the idle task can take the true
   * minimum priority.
   */
  
  #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
   * pased 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.
   *
   * 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 */
  /* As a general rule, the size of size_t should be the same as the size of
   * uintptr_t: 32-bits on a machine with 32-bit addressing but 64-bits on a
   * machine with 64-bit addressing.
   */
  
  typedef uintptr_t    size_t;
  typedef intptr_t     ssize_t;
  typedef uintptr_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;
  
  /* 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;
  
  /* 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
   */
  
  #ifndef CONFIG_WCHAR_BUILTIN
  typedef uint16_t     wchar_t;
  #endif
  
  /* 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;
  
  /* Large file versions */
  
  #ifdef CONFIG_HAVE_LONG_LONG
  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 */
  
  typedef uint32_t     clock_t;
  
  /* 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
  #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 */
  