syscalls/ffi-wrappers-unix.lisp

   1 ;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; indent-tabs-mode: nil -*-
   2 ;;;
   3 ;;; --- FFI wrappers.
   4 ;;;
   5
   6 (in-package :iolib.syscalls)
   7
   8 (define "_XOPEN_SOURCE" 600)
   9 (c "#if defined(__linux__)")
  10 (define "_LARGEFILE_SOURCE")
  11 (define "_LARGEFILE64_SOURCE")
  12 (define "_FILE_OFFSET_BITS" 64)
  13 (c "#endif")
  14
  15 (include "string.h" "errno.h" "sys/types.h" "sys/stat.h"
  16          "unistd.h" "sys/mman.h")
  17 \f
  18
  19 ;;;-----------------------------------------------------------------------------
  20 ;;; Large-file support
  21 ;;;-----------------------------------------------------------------------------
  22
  23 ;;; FIXME: this is only necessary on Linux right?
  24
  25 (defwrapper ("lseek" %sys-lseek)
  26     ("off_t" (return-wrapper off-t :error-generator signal-posix-error))
  27   (fildes :int)
  28   (offset off-t)
  29   (whence :int))
  30
  31 (defwrapper ("truncate" %sys-truncate)
  32     ("int" (return-wrapper :int :error-generator signal-posix-error/restart))
  33   (path ("const char*" filename-designator))
  34   (length off-t))
  35
  36 (defwrapper ("ftruncate" %sys-ftruncate)
  37     ("int" (return-wrapper :int :error-generator signal-posix-error/restart))
  38   (fd     :int)
  39   (length off-t))
  40
  41 (defwrapper ("mmap" %sys-mmap)
  42     ("void*" (return-wrapper :pointer :error-generator signal-posix-error))
  43   (start  :pointer)
  44   (length size-t)
  45   (prot   :int)
  46   (flags  :int)
  47   (fd     :int)
  48   (offset off-t))
  49
  50 (defwrapper ("stat" %%sys-stat)
  51     ("int" (return-wrapper :int :error-generator signal-posix-error))
  52   (file-name ("const char*" filename-designator))
  53   (buf       ("struct stat*" :pointer)))
  54
  55 (defwrapper ("fstat" %%sys-fstat)
  56     ("int" (return-wrapper :int :error-generator signal-posix-error))
  57   (filedes :int)
  58   (buf     ("struct stat*" :pointer)))
  59
  60 (defwrapper ("lstat" %%sys-lstat)
  61     ("int" (return-wrapper :int :error-generator signal-posix-error))
  62   (file-name ("const char*" filename-designator))
  63   (buf       ("struct stat*" :pointer)))
  64
  65 (defwrapper ("pread" %sys-pread)
  66     ("ssize_t" (return-wrapper ssize-t :error-generator signal-posix-error/restart))
  67   (fd     :int)
  68   (buf    :pointer)
  69   (count  size-t)
  70   (offset off-t))
  71
  72 (defwrapper ("pwrite" %sys-pwrite)
  73     ("ssize_t" (return-wrapper ssize-t :error-generator signal-posix-error/restart))
  74   (fd     :int)
  75   (buf    :pointer)
  76   (count  size-t)
  77   (offset off-t))
  78 \f
  79
  80 ;;;-----------------------------------------------------------------------------
  81 ;;; ERRNO-related functions
  82 ;;;-----------------------------------------------------------------------------
  83
  84 (defwrapper* ("iolib_get_errno" %sys-errno) :int
  85   ()
  86   "return errno;")
  87
  88 (defwrapper* ("iolib_set_errno" %%sys-set-errno) :int
  89   ((value :int))
  90   "errno = value;"
  91   "return errno;")
  92
  93 (defwrapper ("strerror_r" %sys-strerror-r)
  94     ("int" (return-wrapper :int :error-generator signal-posix-error))
  95   (errnum :int)
  96   (buf    :string)
  97   (buflen size-t))