566efee219
1998-02-02 01:12 Ulrich Drepper <drepper@cygnus.com> * libc.map: Add _h_errno. * inet/herrno.c: Make _h_errno weak alias. * login/Makefile (distribute): Add pty-internal.h. * nscd/Makefile (distribute): Add all the files missing. * signal/allocrtsig.c: Fix problem with recognizing whether RT sigs are available. * stdio-common/tstscanf.c: Rewrite a bit to continue after errors and report status at the end. * sysdeps/unix/sysv/linux/syscalls.list: Add lchown. * sysdeps/unix/sysv/linux/i386/sysdep.S: Make errno an initialized variable. * sysdeps/unix/sysv/linux/powerpc/sysdep.c: Add alias _errno for errno. * sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.S: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.S: Likewise. 1998-01-03 20:47 Mark Kettenis <kettenis@phys.uva.nl> * configure.in: Fix --enable-add-ons code. 1998-02-01 Andreas Jaeger <aj@arthur.rhein-neckar.de> * elf/rtld.c (dl_main): Allow ":" as separator for LD_PRELOAD. Patch by Rudolf Leitgeb <leitgeb@leland.stanford.edu>. [PR libc/441] * sysdeps/generic/dl-cache.c (_dl_load_cache_lookup): Use first occurence in cache. Reported by Rudolf Leitgeb <leitgeb@leland.stanford.edu>. [PR libc/440] 1998-02-01 21:18 Ulrich Drepper <drepper@cygnus.com> * libio/iovsscanf.c: Set errno to 0 before calling _IO_vfscanf so that it never is EINTR (which is tested for in _IO_vfscanf). * Makefile.in: Call sub-make with CVSOPTS. * elf/Makefile (distribute): Add dl-procinfo.h. * sysdeps/unix/sysv/linux/alpha/Dist: Add rt_sigaction.S. 1998-02-01 15:54 Ulrich Drepper <drepper@cygnus.com> * version.h (VERSION): Bump to 2.0.92. 1998-01-31 Phil Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/siglist.c (_sys_siglist): Additional weak alias for __new_sys_siglist. thread and not pthread_detach.
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/* Handle real-time signal allocation.
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Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <signal.h>
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/* In these variables we keep track of the used variables. If the
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platform does not support any real-time signals we will define the
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values to some unreasonable value which will signal failing of all
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the functions below. */
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#ifndef __SIGRTMIN
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static int current_rtmin = -1;
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static int current_rtmax = -1;
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#else
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static int current_rtmin = __SIGRTMIN;
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static int current_rtmax = __SIGRTMAX;
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static int initialized;
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#include "testrtsig.h"
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static void
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init (void)
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{
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if (!kernel_has_rtsig ())
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{
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current_rtmin = -1;
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current_rtmax = -1;
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}
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initialized = 1;
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}
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#endif
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/* Return number of available real-time signal with highest priority. */
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int
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__libc_current_sigrtmin (void)
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{
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#ifdef __SIGRTMIN
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if (!initialized)
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init ();
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#endif
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return current_rtmin;
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}
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/* Return number of available real-time signal with lowest priority. */
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int
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__libc_current_sigrtmax (void)
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{
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#ifdef __SIGRTMIN
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if (!initialized)
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init ();
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#endif
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return current_rtmax;
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}
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/* Allocate real-time signal with highest/lowest available
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priority. Please note that we don't use a lock since we assume
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this function to be called at program start. */
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int
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__libc_allocate_rtsig (int high)
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{
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#ifndef __SIGRTMIN
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return -1;
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#else
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if (!initialized)
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init ();
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if (current_rtmin == -1 || current_rtmin > current_rtmax)
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/* We don't have anymore signal available. */
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return -1;
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return high ? current_rtmin++ : current_rtmax--;
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#endif
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}
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