sysdeps/htl/futex-internal.h

   1 /* futex operations for glibc-internal use.  Stub version; do not include
   2    this file directly.
   3    Copyright (C) 2014-2024 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   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    <https://www.gnu.org/licenses/>.  */
  19
  20 #ifndef STUB_FUTEX_INTERNAL_H
  21 #define STUB_FUTEX_INTERNAL_H
  22
  23 #include <pthread.h>
  24
  25 /* Returns EINVAL if PSHARED is neither PTHREAD_PROCESS_PRIVATE nor
  26    PTHREAD_PROCESS_SHARED; otherwise, returns 0 if PSHARED is supported, and
  27    ENOTSUP if not.  */
  28 static __always_inline int
  29 futex_supports_pshared (int pshared)
  30 {
  31   if (__glibc_likely (pshared == PTHREAD_PROCESS_PRIVATE))
  32     return 0;
  33   else if (pshared == PTHREAD_PROCESS_SHARED)
  34     return 0;
  35   else
  36     return EINVAL;
  37 }
  38
  39 #endif  /* futex-internal.h */