sysdeps/unix/sysv/linux/semtimedop.c

   1 /* Copyright (C) 1995-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <sys/sem.h>
  19 #include <ipc_priv.h>
  20 #include <sysdep.h>
  21 #include <errno.h>
  22
  23 static int
  24 semtimedop_syscall (int semid, struct sembuf *sops, size_t nsops,
  25                     const struct __timespec64 *timeout)
  26 {
  27 #ifdef __NR_semtimedop_time64
  28   return INLINE_SYSCALL_CALL (semtimedop_time64, semid, sops, nsops, timeout);
  29 #elif defined __ASSUME_DIRECT_SYSVIPC_SYSCALLS && defined __NR_semtimedop
  30   return INLINE_SYSCALL_CALL (semtimedop, semid, sops, nsops, timeout);
  31 #else
  32   return INLINE_SYSCALL_CALL (ipc, IPCOP_semtimedop, semid,
  33                               SEMTIMEDOP_IPC_ARGS (nsops, sops, timeout));
  34 #endif
  35 }
  36
  37 /* Perform user-defined atomical operation of array of semaphores.  */
  38 int
  39 __semtimedop64 (int semid, struct sembuf *sops, size_t nsops,
  40                 const struct __timespec64 *timeout)
  41 {
  42 #ifdef __ASSUME_TIME64_SYSCALLS
  43   return semtimedop_syscall (semid, sops, nsops, timeout);
  44 #else
  45   bool need_time64 = timeout != NULL && !in_int32_t_range (timeout->tv_sec);
  46   if (need_time64)
  47     {
  48       int r = semtimedop_syscall (semid, sops, nsops, timeout);
  49       if (r == 0 || errno != ENOSYS)
  50         return r;
  51       __set_errno (EOVERFLOW);
  52       return -1;
  53     }
  54
  55   struct timespec ts32, *pts32 = NULL;
  56   if (timeout != NULL)
  57     {
  58       ts32 = valid_timespec64_to_timespec (*timeout);
  59       pts32 = &ts32;
  60     }
  61 # ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
  62   return INLINE_SYSCALL_CALL (semtimedop, semid, sops, nsops, pts32);
  63 # else
  64   return INLINE_SYSCALL_CALL (ipc, IPCOP_semtimedop, semid,
  65                               SEMTIMEDOP_IPC_ARGS (nsops, sops, pts32));
  66 # endif
  67 #endif
  68 }
  69 #if __TIMESIZE != 64
  70 libc_hidden_def (__semtimedop64)
  71
  72 int
  73 __semtimedop (int semid, struct sembuf *sops, size_t nsops,
  74               const struct timespec *timeout)
  75 {
  76   struct __timespec64 ts64, *pts64 = NULL;
  77   if (timeout != NULL)
  78     {
  79       ts64 = valid_timespec_to_timespec64 (*timeout);
  80       pts64 = &ts64;
  81     }
  82   return __semtimedop64 (semid, sops, nsops, pts64);
  83 }
  84 #endif
  85 weak_alias (__semtimedop, semtimedop)