Blame sysdeps/nptl/allocrtsig.c

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/* Handle real-time signal allocation.  NPTL version.
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   Copyright (C) 2015-2018 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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   <http://www.gnu.org/licenses/>.  */
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#include <signal.h>
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#include <nptl/pthreadP.h>
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/* Up to three special signals might be used privately by libpthread.
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   Figure out how many unique ones are actually used.  */
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#ifdef SIGCANCEL
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# define SIGCANCEL_CONSUMES     1
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#else
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# define SIGCANCEL_CONSUMES     0
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#endif
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#if defined SIGTIMER && (!defined SIGCANCEL || SIGTIMER != SIGCANCEL)
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# define SIGTIMER_CONSUMES      1
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#else
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# define SIGTIMER_CONSUMES      0
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#endif
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#if (defined SIGSETXID \
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     && (!defined SIGCANCEL || SIGSETXID != SIGCANCEL) \
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     && (!defined SIGTIMER || SIGSETXID != SIGTIMER))
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# define SIGSETXID_CONSUMES     1
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#else
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# define SIGSETXID_CONSUMES     0
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#endif
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/* This tells the generic code (included below) how many signal
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   numbers need to be reserved for libpthread's private uses.  */
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#define RESERVED_SIGRT          \
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  (SIGCANCEL_CONSUMES + SIGTIMER_CONSUMES + SIGSETXID_CONSUMES)
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#include <signal/allocrtsig.c>