libpthread/linuxthreads/sysdeps/pthread/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 /* Uncancelable open.  */
  25 #if defined __NR_openat && !defined __NR_open
  26 #define open_not_cancel(name, flags, mode) \
  27         INLINE_SYSCALL (openat, 4, AT_FDCWD, (const char *) (name), \
  28                 (flags), (mode))
  29 #define open_not_cancel_2(name, flags) \
  30         INLINE_SYSCALL (openat, 3, AT_FDCWD, (const char *) (name), \
  31                 (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 /* Uncancelable openat.  */
  40 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  41 extern int __openat_nocancel (int fd, const char *fname, int oflag,
  42                               mode_t mode) attribute_hidden;
  43 extern int __openat64_nocancel (int fd, const char *fname, int oflag,
  44                                 mode_t mode) attribute_hidden;
  45 #else
  46 # define __openat_nocancel(fd, fname, oflag, mode) \
  47   openat (fd, fname, oflag, mode)
  48 # define __openat64_nocancel(fd, fname, oflag, mode) \
  49   openat64 (fd, fname, oflag, mode)
  50 #endif
  51
  52 #define openat_not_cancel(fd, fname, oflag, mode) \
  53   __openat_nocancel (fd, fname, oflag, mode)
  54 #define openat_not_cancel_3(fd, fname, oflag) \
  55   __openat_nocancel (fd, fname, oflag, 0)
  56 #define openat64_not_cancel(fd, fname, oflag, mode) \
  57   __openat64_nocancel (fd, fname, oflag, mode)
  58 #define openat64_not_cancel_3(fd, fname, oflag) \
  59   __openat64_nocancel (fd, fname, oflag, 0)
  60
  61 /* Uncancelable close.  */
  62 #define close_not_cancel(fd) \
  63   INLINE_SYSCALL (close, 1, fd)
  64 #define close_not_cancel_no_status(fd) \
  65   (void) ({ INTERNAL_SYSCALL_DECL (err);                                      \
  66             INTERNAL_SYSCALL (close, err, 1, (fd)); })
  67
  68 /* Uncancelable read.  */
  69 #define read_not_cancel(fd, buf, n) \
  70   INLINE_SYSCALL (read, 3, (fd), (buf), (n))
  71
  72 /* Uncancelable write.  */
  73 #define write_not_cancel(fd, buf, n) \
  74   INLINE_SYSCALL (write, 3, (fd), (buf), (n))
  75
  76 /* Uncancelable writev.  */
  77 #define writev_not_cancel_no_status(fd, iov, n) \
  78   (void) ({ INTERNAL_SYSCALL_DECL (err);                                      \
  79             INTERNAL_SYSCALL (writev, err, 3, (fd), (iov), (n)); })
  80
  81 /* Uncancelable fcntl.  */
  82 #define fcntl_not_cancel(fd, cmd, val) \
  83   __fcntl_nocancel (fd, cmd, val)
  84
  85 /* Uncancelable waitpid.  */
  86 #ifdef __NR_waitpid
  87 # define waitpid_not_cancel(pid, stat_loc, options) \
  88   INLINE_SYSCALL (waitpid, 3, pid, stat_loc, options)
  89 #else
  90 # define waitpid_not_cancel(pid, stat_loc, options) \
  91   INLINE_SYSCALL (wait4, 4, pid, stat_loc, options, NULL)
  92 #endif
  93
  94 /* Uncancelable pause.  */
  95 #ifdef __NR_pause
  96 # define pause_not_cancel() \
  97   INLINE_SYSCALL (pause, 0)
  98 #else
  99 # define pause_not_cancel() \
 100   __pause_nocancel ()
 101 #endif
 102
 103 /* Uncancelable nanosleep.  */
 104 #ifdef __NR_nanosleep
 105 # define nanosleep_not_cancel(requested_time, remaining) \
 106   INLINE_SYSCALL (nanosleep, 2, requested_time, remaining)
 107 #else
 108 extern int __nanosleep_nocancel (const struct timespec *requested_time, struct timespec *remaining);
 109 # define nanosleep_not_cancel(requested_time, remaining) \
 110   __nanosleep_nocancel (requested_time, remaining)
 111 #endif
 112
 113 /* Uncancelable sigsuspend.  */
 114 #define sigsuspend_not_cancel(set) \
 115   __sigsuspend_nocancel (set)