sysdeps/nptl/timer_routines.h

   1 /* Helper code for POSIX timer implementation on NPTL.
   2    Copyright (C) 2000-2023 Free Software Foundation, Inc.
   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 License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    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; see the file COPYING.LIB.  If
  17    not, see <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _TIMER_ROUTINES_H
  20 #define _TIMER_ROUTINES_H       1
  21
  22 #include <internaltypes.h>
  23 #include <string.h>
  24
  25 /* Compare two pthread_attr_t thread attributes for exact equality.
  26    Returns 1 if they are equal, otherwise zero if they are not equal
  27    or contain illegal values.  This version is NPTL-specific for
  28    performance reason.  One could use the access functions to get the
  29    values of all the fields of the attribute structure.  */
  30 static inline int
  31 thread_attr_compare (const pthread_attr_t *left, const pthread_attr_t *right)
  32 {
  33   struct pthread_attr *ileft = (struct pthread_attr *) left;
  34   struct pthread_attr *iright = (struct pthread_attr *) right;
  35
  36   return (ileft->flags == iright->flags
  37           && ileft->schedpolicy == iright->schedpolicy
  38           && (ileft->schedparam.sched_priority
  39               == iright->schedparam.sched_priority)
  40           && ileft->guardsize == iright->guardsize
  41           && ileft->stackaddr == iright->stackaddr
  42           && ileft->stacksize == iright->stacksize
  43           && ((ileft->cpuset == NULL && iright->cpuset == NULL)
  44               || (ileft->cpuset != NULL && iright->cpuset != NULL
  45                   && ileft->cpusetsize == iright->cpusetsize
  46                   && memcmp (ileft->cpuset, iright->cpuset,
  47                              ileft->cpusetsize) == 0)));
  48 }
  49
  50 #endif  /* timer_routines.h */