libitm/local.cc

   1 /* Copyright (C) 2008, 2009, 2011, 2012 Free Software Foundation, Inc.
   2    Contributed by Richard Henderson <rth@redhat.com>.
   3
   4    This file is part of the GNU Transactional Memory Library (libitm).
   5
   6    Libitm is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
  12    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  13    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14    more details.
  15
  16    Under Section 7 of GPL version 3, you are granted additional
  17    permissions described in the GCC Runtime Library Exception, version
  18    3.1, as published by the Free Software Foundation.
  19
  20    You should have received a copy of the GNU General Public License and
  21    a copy of the GCC Runtime Library Exception along with this program;
  22    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23    <http://www.gnu.org/licenses/>.  */
  24
  25 #include "libitm_i.h"
  26
  27 namespace GTM HIDDEN {
  28
  29
  30 void
  31 gtm_undolog::rollback (size_t until_size)
  32 {
  33   size_t i, n = undolog.size();
  34
  35   if (n > 0)
  36     {
  37       for (i = n; i-- > until_size; )
  38         {
  39           void *ptr = (void *) undolog[i--];
  40           size_t len = undolog[i];
  41           size_t words = (len + sizeof(gtm_word) - 1) / sizeof(gtm_word);
  42           i -= words;
  43           __builtin_memcpy (ptr, &undolog[i], len);
  44         }
  45     }
  46 }
  47
  48 void ITM_REGPARM
  49 GTM_LB (const void *ptr, size_t len)
  50 {
  51   gtm_thread *tx = gtm_thr();
  52   tx->undolog.log(ptr, len);
  53 }
  54
  55 } // namespace GTM
  56
  57 using namespace GTM;
  58
  59 /* ??? Use configure to determine if aliases are supported.  Or convince
  60    the compiler to not just tail call this, but actually generate the
  61    same_body_alias itself.  */
  62 void ITM_REGPARM
  63 _ITM_LB (const void *ptr, size_t len)
  64 {
  65   GTM_LB (ptr, len);
  66 }
  67
  68 #define ITM_LOG_DEF(T) \
  69 void ITM_REGPARM _ITM_L##T (const _ITM_TYPE_##T *ptr) \
  70 { GTM_LB (ptr, sizeof (*ptr)); }
  71
  72 ITM_LOG_DEF(U1)
  73 ITM_LOG_DEF(U2)
  74 ITM_LOG_DEF(U4)
  75 ITM_LOG_DEF(U8)
  76 ITM_LOG_DEF(F)
  77 ITM_LOG_DEF(D)
  78 ITM_LOG_DEF(E)
  79 ITM_LOG_DEF(CF)
  80 ITM_LOG_DEF(CD)
  81 ITM_LOG_DEF(CE)