libc/sysdeps/linux/common/not-cancel.h

   1 /* Uncancelable versions of cancelable interfaces.  Linux version.
   2    Copyright (C) 2003, 2006 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <sys/types.h>
  21 #include <sysdep.h>
  22 #include <time.h>
  23
  24 #ifdef NOT_IN_libc
  25
  26 /* Uncancelable open.  */
  27 #if defined __NR_openat && !defined __NR_open
  28 #define open_not_cancel(name, flags, mode) \
  29    INLINE_SYSCALL (openat, 4, AT_FDCWD, (const char *) (name), (flags), (mode))
  30 #define open_not_cancel_2(name, flags) \
  31    INLINE_SYSCALL (openat, 3, AT_FDCWD, (const char *) (name), (flags))
  32 #else
  33 #define open_not_cancel(name, flags, mode) \
  34    INLINE_SYSCALL (open, 3, (const char *) (name), (flags), (mode))
  35 #define open_not_cancel_2(name, flags) \
  36    INLINE_SYSCALL (open, 2, (const char *) (name), (flags))
  37 #endif
  38
  39 #if 0
  40 /* Uncancelable openat.  */
  41 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  42 extern int __openat_nocancel (int fd, const char *fname, int oflag,
  43                               mode_t mode) attribute_hidden;
  44 extern int __openat64_nocancel (int fd, const char *fname, int oflag,
  45                                 mode_t mode) attribute_hidden;
  46 #else
  47 # define __openat_nocancel(fd, fname, oflag, mode) \
  48   openat (fd, fname, oflag, mode)
  49 # define __openat64_nocancel(fd, fname, oflag, mode) \
  50   openat64 (fd, fname, oflag, mode)
  51 #endif
  52
  53 #define openat_not_cancel(fd, fname, oflag, mode) \
  54   __openat_nocancel (fd, fname, oflag, mode)
  55 #define openat_not_cancel_3(fd, fname, oflag) \
  56   __openat_nocancel (fd, fname, oflag, 0)
  57 #define openat64_not_cancel(fd, fname, oflag, mode) \
  58   __openat64_nocancel (fd, fname, oflag, mode)
  59 #define openat64_not_cancel_3(fd, fname, oflag) \
  60   __openat64_nocancel (fd, fname, oflag, 0)
  61 #endif
  62
  63 /* Uncancelable close.  */
  64 #define close_not_cancel(fd) \
  65   INLINE_SYSCALL (close, 1, fd)
  66 #define close_not_cancel_no_status(fd) \
  67   (void) ({ INTERNAL_SYSCALL_DECL (err);                                      \
  68             INTERNAL_SYSCALL (close, err, 1, (fd)); })
  69
  70 /* Uncancelable read.  */
  71 #define read_not_cancel(fd, buf, n) \
  72   INLINE_SYSCALL (read, 3, (fd), (buf), (n))
  73
  74 #ifdef __UCLIBC_HAS_THREADS__
  75 /* Uncancelable write.  */
  76 #define write_not_cancel(fd, buf, n) \
  77   INLINE_SYSCALL (write, 3, (fd), (buf), (n))
  78 #endif
  79
  80 #if 0
  81 /* Uncancelable writev.  */
  82 #define writev_not_cancel_no_status(fd, iov, n) \
  83   (void) ({ INTERNAL_SYSCALL_DECL (err);                                      \
  84             INTERNAL_SYSCALL (writev, err, 3, (fd), (iov), (n)); })
  85
  86 /* Uncancelable fcntl.  */
  87 #define fcntl_not_cancel(fd, cmd, val) \
  88   __fcntl_nocancel (fd, cmd, val)
  89 #endif
  90
  91 #ifdef __UCLIBC_HAS_LINUXTHREADS__
  92 /* Uncancelable waitpid.  */
  93 #if 0 /*def __NR_waitpid*/
  94 # define waitpid_not_cancel(pid, stat_loc, options) \
  95   INLINE_SYSCALL (waitpid, 3, pid, stat_loc, options)
  96 #else
  97 # define waitpid_not_cancel(pid, stat_loc, options) \
  98   INLINE_SYSCALL (wait4, 4, pid, stat_loc, options, NULL)
  99 #endif
 100 #endif
 101
 102 /* Uncancelable pause.  */
 103 #ifdef __NR_pause
 104 # define pause_not_cancel() \
 105   INLINE_SYSCALL (pause, 0)
 106 #else
 107 # include <unistd.h>
 108 extern __typeof(pause) __pause_nocancel;
 109 # define pause_not_cancel() \
 110   __pause_nocancel ()
 111 #endif
 112
 113 /* Uncancelable nanosleep.  */
 114 #ifdef __NR_nanosleep
 115 # define nanosleep_not_cancel(requested_time, remaining) \
 116   INLINE_SYSCALL (nanosleep, 2, requested_time, remaining)
 117 #else
 118 extern int __nanosleep_nocancel (const struct timespec *requested_time, struct timespec *remaining);
 119 # define nanosleep_not_cancel(requested_time, remaining) \
 120   __nanosleep_nocancel (requested_time, remaining)
 121 #endif
 122
 123 #if 0
 124 /* Uncancelable sigsuspend.  */
 125 #define sigsuspend_not_cancel(set) \
 126   __sigsuspend_nocancel (set)
 127 #endif
 128
 129 #elif !defined NOT_IN_libc
 130
 131 #include <cancel.h>
 132 #include <fcntl.h>
 133 #include <unistd.h>
 134
 135 #define open_not_cancel(name, flags, mode) \
 136         __NC(open)(name, flags, mode)
 137 #define open_not_cancel_2(name, flags) \
 138         __NC(open2)(name, flags)
 139
 140 #define close_not_cancel(fd) \
 141         __NC(close)(fd)
 142 #define close_not_cancel_no_status(fd) \
 143         __close_nocancel_no_status(fd)
 144
 145 #define read_not_cancel(fd, buf, n) \
 146         __NC(read)(fd, buf, n)
 147
 148 #define write_not_cancel(fd, buf, n) \
 149         __NC(write)(fd, buf, n)
 150
 151 #define fcntl_not_cancel(fd, cmd, val) \
 152         __NC(fcntl)(fd, cmd, val)
 153
 154 #endif