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74d463c50b
Current Bionic has this function, with enhanced error checking (the undefined case terminates the process). Reviewed-by: Joseph Myers <josmyers@redhat.com>
31 lines
1.1 KiB
C
31 lines
1.1 KiB
C
/* Get the Linux TID from a pthread_t handle.
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Copyright (C) 2025 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 License as
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published by the Free Software Foundation; either version 2.1 of the
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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; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <pthreadP.h>
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pid_t
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pthread_gettid_np (pthread_t threadid)
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{
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/* The kernel may concurrently set this field. */
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pid_t tid = atomic_load_relaxed (&((struct pthread *) threadid)->tid);
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if (tid <= 0)
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return -1;
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return tid;
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}
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