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/* Copyright (C) 2008-2022 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
This file is part of the GNU Transactional Memory Library (libitm).
Libitm is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libitm_i.h"
using namespace GTM;
int ITM_REGPARM
_ITM_versionCompatible (int version)
{
return version == _ITM_VERSION_NO;
}
const char * ITM_REGPARM
_ITM_libraryVersion (void)
{
return "GNU libitm " _ITM_VERSION;
}
_ITM_howExecuting ITM_REGPARM
_ITM_inTransaction (void)
{
#if defined(USE_HTM_FASTPATH)
// If we use the HTM fastpath, we cannot reliably detect whether we are
// in a transaction because this function can be called outside of
// a transaction and thus we can't deduce this by looking at just the serial
// lock. This function isn't used in practice currently, so the easiest
// way to handle it is to just abort.
if (gtm_thread::serial_lock.get_htm_fastpath() && htm_transaction_active())
htm_abort();
#endif
struct gtm_thread *tx = gtm_thr();
if (tx && (tx->nesting > 0))
{
if (tx->state & gtm_thread::STATE_IRREVOCABLE)
return inIrrevocableTransaction;
else
return inRetryableTransaction;
}
return outsideTransaction;
}
_ITM_transactionId_t ITM_REGPARM
_ITM_getTransactionId (void)
{
#if defined(USE_HTM_FASTPATH)
// See ITM_inTransaction.
if (gtm_thread::serial_lock.get_htm_fastpath() && htm_transaction_active())
htm_abort();
#endif
struct gtm_thread *tx = gtm_thr();
return (tx && (tx->nesting > 0)) ? tx->id : _ITM_noTransactionId;
}
void ITM_REGPARM ITM_NORETURN
_ITM_error (const _ITM_srcLocation * loc UNUSED, int errorCode UNUSED)
{
abort ();
}
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