libitm/config/sparc/cacheline.h

   1 /* Copyright (C) 2012-2013 Free Software Foundation, Inc.
   2
   3    This file is part of the GNU Transactional Memory Library (libitm).
   4
   5    Libitm is free software; you can redistribute it and/or modify it
   6    under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
  11    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13    more details.
  14
  15    Under Section 7 of GPL version 3, you are granted additional
  16    permissions described in the GCC Runtime Library Exception, version
  17    3.1, as published by the Free Software Foundation.
  18
  19    You should have received a copy of the GNU General Public License and
  20    a copy of the GCC Runtime Library Exception along with this program;
  21    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  22    <http://www.gnu.org/licenses/>.  */
  23
  24 #ifndef LIBITM_SPARC_CACHELINE_H
  25 #define LIBITM_SPARC_CACHELINE_H 1
  26
  27 // A cacheline is the smallest unit with which locks are associated.
  28 // The current implementation of the _ITM_[RW] barriers assumes that
  29 // all data types can fit (aligned) within a cachline, which means
  30 // in practice sizeof(complex long double) is the smallest cacheline size.
  31 // It ought to be small enough for efficient manipulation of the
  32 // modification mask, below.
  33 #ifdef __arch64__
  34 # define CACHELINE_SIZE 64
  35 #else
  36 # define CACHELINE_SIZE 32
  37 #endif
  38
  39 #include "config/generic/cacheline.h"
  40
  41 #endif // LIBITM_SPARC_CACHELINE_H