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a30e960328
Replace the 3 uses of atomic_bit_set and atomic_bit_test_set with atomic_fetch_or_relaxed. Using relaxed MO is correct since the atomics are used to ensure memory is released only once. Reviewed-by: Florian Weimer <fweimer@redhat.com>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* TCB deallocation for NPTL.
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Copyright (C) 2002-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <nptl-stack.h>
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#include <pthreadP.h>
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#include <stdlib.h>
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void
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__nptl_free_tcb (struct pthread *pd)
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{
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/* The thread is exiting now. */
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if ((atomic_fetch_or_relaxed (&pd->cancelhandling, TERMINATED_BITMASK)
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& TERMINATED_BITMASK) == 0)
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{
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/* Free TPP data. */
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if (pd->tpp != NULL)
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{
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struct priority_protection_data *tpp = pd->tpp;
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pd->tpp = NULL;
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free (tpp);
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}
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/* Queue the stack memory block for reuse and exit the process. The
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kernel will signal via writing to the address returned by
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QUEUE-STACK when the stack is available. */
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__nptl_deallocate_stack (pd);
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}
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}
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libc_hidden_def (__nptl_free_tcb)
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