diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/timer_routines.c')
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/timer_routines.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/timer_routines.c b/nptl/sysdeps/unix/sysv/linux/timer_routines.c new file mode 100644 index 0000000000..3f69aa64fd --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/timer_routines.c @@ -0,0 +1,81 @@ +/* Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. + + 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; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <setjmp.h> +#include <signal.h> +#include <stdbool.h> +#include <sysdep.h> +#include <kernel-features.h> +#include "kernel-posix-timers.h" + + +#ifdef __NR_timer_create +/* Helper thread to call the user-provided function. */ +static void * +timer_sigev_thread (void *arg) +{ + struct timer *tk = (struct timer *) arg; + + /* Call the user-provided function. */ + tk->thrfunc (tk->sival); + + return NULL; +} + + +/* Helper function to support starting threads for SIGEV_THREAD. */ +void * +attribute_hidden +__timer_helper_thread (void *arg) +{ + /* Block all signals. */ + sigset_t ss; + + sigfillset (&ss); + (void) pthread_sigmask (SIG_BLOCK, &ss, NULL); + + struct timer *tk = (struct timer *) arg; + + /* Synchronize with the parent. */ + (void) pthread_barrier_wait (&tk->bar); + + /* We will only wait for the signal the kernel will send. */ + sigemptyset (&ss); + sigaddset (&ss, TIMER_SIG); + + /* Endless loop of waiting for signals. The loop is only ended when + the thread is canceled. */ + while (1) + { + siginfo_t si; + + if (sigwaitinfo (&ss, &si) > 0 && si.si_timerid == tk->ktimerid) + { + /* That the signal we are waiting for. */ + pthread_t th; + (void) pthread_create (&th, &tk->attr, timer_sigev_thread, arg); + } + } +} + +#endif + +#ifndef __ASSUME_POSIX_TIMERS +# include <nptl/sysdeps/pthread/timer_routines.c> +#endif |