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semaphore.h (1091B) - Raw

      1 /* Copyright (C) 2002-2025 Free Software Foundation, Inc.
      2 
      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 _SEMAPHORE_H
     20 # error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
     21 #endif
     22 
     23 #define __SIZEOF_SEM_T	32
     24 
     25 /* Value returned if `sem_open' failed.  */
     26 #define SEM_FAILED      ((sem_t *) 0)
     27 
     28 
     29 typedef union
     30 {
     31   char __size[__SIZEOF_SEM_T];
     32   long long int __align;
     33 } sem_t;