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60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
/* Support functionality for using signals.
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Copyright (C) 2016-2020 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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#ifndef SUPPORT_SIGNAL_H
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#define SUPPORT_SIGNAL_H
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#include <signal.h>
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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/* The following functions call the corresponding libc functions and
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terminate the process on error. */
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void xraise (int sig);
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sighandler_t xsignal (int sig, sighandler_t handler);
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void xsigaction (int sig, const struct sigaction *newact,
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struct sigaction *oldact);
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/* The following functions call the corresponding libpthread functions
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and terminate the process on error. */
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void xpthread_sigmask (int how, const sigset_t *set, sigset_t *oldset);
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/* Allocate and activate an alternate signal stack. This stack will
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have SIZE + MINSIGSTKSZ bytes of space, rounded up to a whole
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number of pages. There will be large (at least 1 MiB) inaccessible
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guard bands on either side of it. The return value is a cookie
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that can be passed to xfree_sigstack to deactivate and deallocate
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the stack again. It is not necessary to call sigaltstack after
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calling this function. Terminates the process on error. */
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void *xalloc_sigstack (size_t size);
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/* Deactivate and deallocate a signal stack created by xalloc_sigstack. */
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void xfree_sigstack (void *stack);
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/* Extract the actual address and size of the alternate signal stack from
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the cookie returned by xalloc_sigstack. */
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void xget_sigstack_location (const void *stack, unsigned char **addrp,
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size_t *sizep);
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__END_DECLS
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#endif /* SUPPORT_SIGNAL_H */
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