glibc (2.38)

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       1  /* Copyright (C) 2007-2023 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  #ifndef	_SYS_EVENTFD_H
      19  #define	_SYS_EVENTFD_H	1
      20  
      21  #include <stdint.h>
      22  
      23  /* Get the platform-dependent flags.  */
      24  #include <bits/eventfd.h>
      25  
      26  /* Type for event counter.  */
      27  typedef uint64_t eventfd_t;
      28  
      29  
      30  __BEGIN_DECLS
      31  
      32  /* Return file descriptor for generic event channel.  Set initial
      33     value to COUNT.  */
      34  extern int eventfd (unsigned int __count, int __flags) __THROW;
      35  
      36  /* Read event counter and possibly wait for events.  */
      37  extern int eventfd_read (int __fd, eventfd_t *__value);
      38  
      39  /* Increment event counter.  */
      40  extern int eventfd_write (int __fd, eventfd_t __value);
      41  
      42  __END_DECLS
      43  
      44  #endif /* sys/eventfd.h */