From 82f81a9086320d12eb2fc45766203954b90461a2 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 18 Dec 2002 01:38:17 +0000 Subject: Update. * sysdeps/unix/sysv/linux/alpha/syscalls.list (msgrcv, msgsnd): Make cancelable. * sysdeps/unix/sysv/linux/hppa/syscalls.list (msgrcv, msgsnd): Likewise. * sysdeps/unix/sysv/linux/ia64/syscalls.list (msgrcv, msgsnd): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgrcv, msgsnd): Likewise. * sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgrcv, msgsnd): Likewise. * sysdeps/unix/sysv/linux/ia64/sigsuspend.c (__sigsuspend): Likewise. --- linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c | 85 +++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c (limited to 'linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c') diff --git a/linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c b/linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c new file mode 100644 index 0000000000..a18753233a --- /dev/null +++ b/linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c @@ -0,0 +1,85 @@ +/* Handle real-time signal allocation. + Copyright (C) 1997,98,99,2002 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include + +/* Sanity check. */ +#if !defined __SIGRTMIN || (__SIGRTMAX - __SIGRTMIN) < 3 +# error "This must not happen" +#endif + +static int current_rtmin; +static int current_rtmax; + +static int initialized; + +#include + +static void +init (void) +{ + if (!kernel_has_rtsig ()) + { + current_rtmin = -1; + current_rtmax = -1; + } + else + { + current_rtmin = __SIGRTMIN + 3; + current_rtmax = __SIGRTMAX; + } + initialized = 1; +} + +/* Return number of available real-time signal with highest priority. */ +int +__libc_current_sigrtmin (void) +{ + if (!initialized) + init (); + return current_rtmin; +} +strong_alias (__libc_current_sigrtmin, __libc_current_sigrtmin_private); + +/* Return number of available real-time signal with lowest priority. */ +int +__libc_current_sigrtmax (void) +{ + if (!initialized) + init (); + return current_rtmax; +} +strong_alias (__libc_current_sigrtmax, __libc_current_sigrtmax_private); + +/* Allocate real-time signal with highest/lowest available + priority. Please note that we don't use a lock since we assume + this function to be called at program start. */ +int +__libc_allocate_rtsig (int high) +{ + if (!initialized) + init (); + if (current_rtmin == -1 || current_rtmin > current_rtmax) + /* We don't have anymore signal available. */ + return -1; + + return high ? current_rtmin++ : current_rtmax--; +} +strong_alias (__libc_allocate_rtsig, __libc_allocate_rtsig_private); -- cgit v1.2.3