85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
/* Copyright (C) 2008-2020 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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using namespace GTM;
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int ITM_REGPARM
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_ITM_versionCompatible (int version)
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{
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return version == _ITM_VERSION_NO;
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}
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const char * ITM_REGPARM
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_ITM_libraryVersion (void)
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{
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return "GNU libitm " _ITM_VERSION;
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}
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_ITM_howExecuting ITM_REGPARM
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_ITM_inTransaction (void)
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{
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#if defined(USE_HTM_FASTPATH)
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// If we use the HTM fastpath, we cannot reliably detect whether we are
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// in a transaction because this function can be called outside of
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// a transaction and thus we can't deduce this by looking at just the serial
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// lock. This function isn't used in practice currently, so the easiest
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// way to handle it is to just abort.
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if (gtm_thread::serial_lock.get_htm_fastpath() && htm_transaction_active())
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htm_abort();
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#endif
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struct gtm_thread *tx = gtm_thr();
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if (tx && (tx->nesting > 0))
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{
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if (tx->state & gtm_thread::STATE_IRREVOCABLE)
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return inIrrevocableTransaction;
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else
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return inRetryableTransaction;
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}
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return outsideTransaction;
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}
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_ITM_transactionId_t ITM_REGPARM
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_ITM_getTransactionId (void)
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{
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#if defined(USE_HTM_FASTPATH)
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// See ITM_inTransaction.
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if (gtm_thread::serial_lock.get_htm_fastpath() && htm_transaction_active())
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htm_abort();
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#endif
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struct gtm_thread *tx = gtm_thr();
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return (tx && (tx->nesting > 0)) ? tx->id : _ITM_noTransactionId;
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}
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void ITM_REGPARM ITM_NORETURN
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_ITM_error (const _ITM_srcLocation * loc UNUSED, int errorCode UNUSED)
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{
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abort ();
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}
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