sysdeps/nptl/timer_routines.h

   1 /* Helper code for POSIX timer implementation on NPTL.
   2    Copyright (C) 2000-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
   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 License as
   8    published by the Free Software Foundation; either version 2.1 of the
   9    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; see the file COPYING.LIB.  If
  18    not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _TIMER_ROUTINES_H
  21 #define _TIMER_ROUTINES_H       1
  22
  23 #include <internaltypes.h>
  24 #include <string.h>
  25
  26 /* Compare two pthread_attr_t thread attributes for exact equality.
  27    Returns 1 if they are equal, otherwise zero if they are not equal
  28    or contain illegal values.  This version is NPTL-specific for
  29    performance reason.  One could use the access functions to get the
  30    values of all the fields of the attribute structure.  */
  31 static inline int
  32 thread_attr_compare (const pthread_attr_t *left, const pthread_attr_t *right)
  33 {
  34   struct pthread_attr *ileft = (struct pthread_attr *) left;
  35   struct pthread_attr *iright = (struct pthread_attr *) right;
  36
  37   return (ileft->flags == iright->flags
  38           && ileft->schedpolicy == iright->schedpolicy
  39           && (ileft->schedparam.sched_priority
  40               == iright->schedparam.sched_priority)
  41           && ileft->guardsize == iright->guardsize
  42           && ileft->stackaddr == iright->stackaddr
  43           && ileft->stacksize == iright->stacksize
  44           && ((ileft->cpuset == NULL && iright->cpuset == NULL)
  45               || (ileft->cpuset != NULL && iright->cpuset != NULL
  46                   && ileft->cpusetsize == iright->cpusetsize
  47                   && memcmp (ileft->cpuset, iright->cpuset,
  48                              ileft->cpusetsize) == 0)));
  49 }
  50
  51 #endif  /* timer_routines.h */