sysdeps/mach/hurd/not-cancel.h

   1 /* Uncancelable versions of cancelable interfaces.  Hurd version.
   2    Copyright (C) 2003-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef NOT_CANCEL_H
  20 # define NOT_CANCEL_H
  21
  22 #include <fcntl.h>
  23 #include <unistd.h>
  24 #include <poll.h>
  25 #include <sys/wait.h>
  26 #include <time.h>
  27 #include <sys/uio.h>
  28 #include <sys/random.h>
  29 #include <hurd.h>
  30 #include <hurd/fd.h>
  31
  32 /* Non cancellable close syscall.  */
  33 __typeof (__close) __close_nocancel;
  34
  35 void __close_nocancel_nostatus (int fd);
  36
  37 /* Non cancellable open syscall.  */
  38 __typeof (__open) __open_nocancel;
  39 /* open64 is just the same as open for us.  */
  40 #define __open64_nocancel(...) \
  41   __open_nocancel (__VA_ARGS__)
  42
  43 /* Non cancellable openat syscall.  */
  44 __typeof (__openat) __openat_nocancel;
  45 /* open64 is just the same as open for us.  */
  46 #define __openat64_nocancel(...) \
  47   __openat_nocancel (__VA_ARGS__)
  48
  49 /* Non cancellable read syscall.  */
  50 __typeof (__read) __read_nocancel;
  51
  52 /* Non cancellable pread syscall (LFS version).  */
  53 __typeof (__pread64) __pread64_nocancel;
  54
  55 /* Non cancellable write syscall.  */
  56 __typeof (__write) __write_nocancel;
  57
  58 /* Non cancellable pwrite syscall (LFS version).  */
  59 __typeof (__pwrite64) __pwrite64_nocancel;
  60
  61 /* Non cancellable writev syscall.  */
  62 __typeof (__writev) __writev_nocancel;
  63
  64 /* Non cancellable writev syscall with no status.  */
  65 void __writev_nocancel_nostatus (int fd, const struct iovec *vector, int count);
  66
  67 /* Non cancellable wait4 syscall.  */
  68 __typeof (__wait4) __wait4_nocancel;
  69
  70 # define __waitpid_nocancel(pid, stat_loc, options) \
  71   __wait4_nocancel (pid, stat_loc, options, NULL)
  72
  73 /* Non cancellable fcntl syscall.  */
  74 __typeof (__fcntl) __fcntl_nocancel;
  75 /* fcntl64 is just the same as fcntl for us.  */
  76 #define __fcntl64_nocancel(...) \
  77   __fcntl_nocancel (__VA_ARGS__)
  78
  79 static inline ssize_t
  80 __getrandom_nocancel (void *buf, size_t buflen, unsigned int flags)
  81 {
  82   int save_errno = errno;
  83   ssize_t r = __getrandom (buf, buflen, flags);
  84   r = r == -1 ? -errno : r;
  85   __set_errno (save_errno);
  86   return r;
  87 }
  88
  89 #define __poll_infinity_nocancel(fds, nfds) \
  90   __poll (fds, nfds, -1)
  91
  92 #if IS_IN (libc)
  93 hidden_proto (__close_nocancel)
  94 hidden_proto (__close_nocancel_nostatus)
  95 hidden_proto (__open_nocancel)
  96 hidden_proto (__openat_nocancel)
  97 hidden_proto (__read_nocancel)
  98 hidden_proto (__pread64_nocancel)
  99 hidden_proto (__write_nocancel)
 100 hidden_proto (__pwrite64_nocancel)
 101 hidden_proto (__writev_nocancel)
 102 hidden_proto (__writev_nocancel_nostatus)
 103 hidden_proto (__wait4_nocancel)
 104 hidden_proto (__fcntl_nocancel)
 105 #endif
 106
 107 #endif /* NOT_CANCEL_H  */