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24e0f6b1dc
* m4/largefile.m4: New file, so that Emacs does not mess up when
accessing files with large inode numbers in MacOS X 10.5 and later.
* m4/nocrash.m4: New file, to avoid triggering background debugger
and/or create core dumps during 'configure'.
* build-aux/move-if-change: Renamed from move-if-change.
* build-aux/snippet/arg-nonnull.h: Renamed from arg-nonnull.h.
* build-aux/snippet/c++defs.h: Renamed from c++defs.h.
* build-aux/snippet/warn-on-use.h: Renamed from warn-on-use.h.
* build-aux/snippet/_Noreturn.h: New file, for draft C1X _Noreturn.
* .bzrignore: The autogenerated files compile, config.guess,
config.sub, depcomp, install-sh, and missing are now in build-aux.
* Makefile.in (epaths-force, sync-from-gnulib):
move-if-change is now in build-aux.
(GNULIB_TOOL_FLAGS): Avoid threadlib; this is now a prerequisite
of gnulib's pthread_sigmask module, but Emacs doesn't need it.
(mkdir): install-sh is now in build-aux.
* config.bat: c++defs.h is now in build-aux/snippets.
* configure.in: Specify AC_CONFIG_AUX_DIR with build-aux (the
usual parameter).
* lib/gnulib.mk, m4/gl-comp.m4: Regenerate.
* lib/makefile.w32-in (ARG_NONNULL_H): arg-nonnull.h moved
to build-aux/snippet.
* lib/pthread_sigmask.c, lib/stdlib.in.h, m4/extensions.m4:
* m4/getopt.m4, m4/gnulib-common.m4, m4/pthread_sigmask.m4:
Merge from gnuilib. This fixes porting bugs on Cygwin, Irix, and
Solaris, enables MacOS extensions, and enables nocrash during
'configure'.
* make-dist: Adjust to new build-aux and build-aux/snippit dirs.
* admin/notes/copyright: The files compile, config.guess, config.sub,
depcomp, install-sh, missing, and move-if-change are now in the
new build-aux subdirectory. The files arg-nonnull.h, c++defs.h,
and warn-on-use.h are now in build-aux/snippets. New file
build-aux/snippets/_Noreturn.h.
* leim/Makefile.in (install): install-sh is now in build-aux.
* lib-src/Makefile.in ($(DESTDIR)${archlibdir}): install-sh moved
to build-aux.
* msdos/sedlibmk.inp (CONFIG_CLEAN_VPATH_FILES): Adjust to snippet moves
from top level to build-aux/snippet.
* src/Makefile.in (gl-stamp): move-if-change is now in build-aux.
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/* POSIX compatible signal blocking for threads.
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Copyright (C) 2011 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it 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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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <signal.h>
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#include <errno.h>
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#include <stddef.h>
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#if PTHREAD_SIGMASK_UNBLOCK_BUG
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# include <unistd.h>
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#endif
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int
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pthread_sigmask (int how, const sigset_t *new_mask, sigset_t *old_mask)
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#undef pthread_sigmask
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{
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#if HAVE_PTHREAD_SIGMASK
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int ret = pthread_sigmask (how, new_mask, old_mask);
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# if PTHREAD_SIGMASK_INEFFECTIVE
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if (ret == 0)
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{
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/* Detect whether pthread_sigmask is currently ineffective.
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Don't cache the information: libpthread.so could be dynamically
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loaded after the program started and after pthread_sigmask was
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called for the first time. */
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if (pthread_sigmask (1729, NULL, NULL) == 0)
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{
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/* pthread_sigmask is currently ineffective. The program is not
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linked to -lpthread. So use sigprocmask instead. */
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return (sigprocmask (how, new_mask, old_mask) < 0 ? errno : 0);
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}
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}
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# endif
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# if PTHREAD_SIGMASK_FAILS_WITH_ERRNO
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if (ret == -1)
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return errno;
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# endif
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# if PTHREAD_SIGMASK_UNBLOCK_BUG
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if (ret == 0
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&& new_mask != NULL
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&& (how == SIG_UNBLOCK || how == SIG_SETMASK))
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{
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/* Give the OS the opportunity to raise signals that were pending before
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the pthread_sigmask call and have now been unblocked. */
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usleep (1);
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}
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# endif
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return ret;
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#else
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int ret = sigprocmask (how, new_mask, old_mask);
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return (ret < 0 ? errno : 0);
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#endif
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}
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