4408b0865b
local.cc:113:6: error: only weak aliases are supported in this configuration * local.cc (_ITM_LB): Use a normal call, not a function alias. From-SVN: r181182
136 lines
3.1 KiB
C++
136 lines
3.1 KiB
C++
/* Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Transactional Memory Library (libitm).
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Libitm is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libitm_i.h"
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namespace GTM HIDDEN {
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struct gtm_undolog_entry
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{
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void *addr;
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size_t len;
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char saved[];
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};
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void
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gtm_thread::commit_undolog ()
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{
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size_t i, n = undolog.size();
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if (n > 0)
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{
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for (i = 0; i < n; ++i)
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free (undolog[i]);
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this->undolog.clear();
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}
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}
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void
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gtm_thread::rollback_undolog (size_t until_size)
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{
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size_t i, n = undolog.size();
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if (n > 0)
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{
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for (i = n; i-- > until_size; )
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{
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gtm_undolog_entry *u = *undolog.pop();
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if (u)
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{
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memcpy (u->addr, u->saved, u->len);
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free (u);
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}
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}
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}
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}
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/* Forget any references to PTR in the local log. */
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void
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gtm_thread::drop_references_undolog (const void *ptr, size_t len)
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{
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size_t i, n = undolog.size();
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if (n > 0)
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{
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for (i = n; i > 0; i--)
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{
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gtm_undolog_entry *u = undolog[i];
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/* ?? Do we need such granularity, or can we get away with
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just comparing PTR and LEN. ?? */
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if ((const char *)u->addr >= (const char *)ptr
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&& ((const char *)u->addr + u->len <= (const char *)ptr + len))
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{
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free (u);
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undolog[i] = NULL;
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}
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}
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}
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}
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void ITM_REGPARM
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GTM_LB (const void *ptr, size_t len)
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{
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gtm_thread *tx = gtm_thr();
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gtm_undolog_entry *undo;
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undo = (gtm_undolog_entry *)
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xmalloc (sizeof (struct gtm_undolog_entry) + len);
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undo->addr = (void *) ptr;
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undo->len = len;
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tx->undolog.push()[0] = undo;
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memcpy (undo->saved, ptr, len);
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}
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} // namespace GTM
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using namespace GTM;
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/* ??? Use configure to determine if aliases are supported. Or convince
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the compiler to not just tail call this, but actually generate the
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same_body_alias itself. */
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void ITM_REGPARM
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_ITM_LB (const void *ptr, size_t len)
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{
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GTM_LB (ptr, len);
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}
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#define ITM_LOG_DEF(T) \
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void ITM_REGPARM _ITM_L##T (const _ITM_TYPE_##T *ptr) \
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{ GTM_LB (ptr, sizeof (*ptr)); }
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ITM_LOG_DEF(U1)
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ITM_LOG_DEF(U2)
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ITM_LOG_DEF(U4)
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ITM_LOG_DEF(U8)
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ITM_LOG_DEF(F)
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ITM_LOG_DEF(D)
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ITM_LOG_DEF(E)
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ITM_LOG_DEF(CF)
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ITM_LOG_DEF(CD)
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ITM_LOG_DEF(CE)
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