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  #include <errno.h>
      19  #include <signal.h>
      20  #include <unistd.h>
      21  #include <sys/epoll.h>
      22  
      23  #include <sysdep-cancel.h>
      24  #include <sys/syscall.h>
      25  
      26  /* Wait for events on an epoll instance "epfd". Returns the number of
      27     triggered events returned in "events" buffer. Or -1 in case of
      28     error with the "errno" variable set to the specific error code. The
      29     "events" parameter is a buffer that will contain triggered
      30     events. The "maxevents" is the maximum number of events to be
      31     returned ( usually size of "events" ). The "timeout" parameter
      32     specifies the maximum wait time in milliseconds (-1 == infinite).
      33     The thread's signal mask is temporarily and atomically replaced with
      34     the one provided as parameter.  */
      35  
      36  int epoll_pwait (int epfd, struct epoll_event *events,
      37  		 int maxevents, int timeout,
      38  		 const sigset_t *set)
      39  {
      40    return SYSCALL_CANCEL (epoll_pwait, epfd, events, maxevents,
      41  			 timeout, set, __NSIG_BYTES);
      42  }
      43  libc_hidden_def (epoll_pwait)