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* sysdeps/unix/sysv/linux/timer_routines.c (timer_helper_thread):

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Allocate new object which is passed to timer_sigev_thread so that
	the timer can be deleted before the new thread is scheduled.
This commit is contained in:
Ulrich Drepper 2006-04-27 18:17:50 +00:00
parent b8c8817c81
commit a6375d1104
2 changed files with 34 additions and 6 deletions
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6
nptl/ChangeLog
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@ -1,3 +1,9 @@
2006-04-27 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/timer_routines.c (timer_helper_thread):
Allocate new object which is passed to timer_sigev_thread so that
the timer can be deleted before the new thread is scheduled.
2006-04-26 Roland McGrath <roland@redhat.com>
* sysdeps/x86_64/tls.h: Include <asm/prctl.h> inside [! __ASSEMBLER__].

34
nptl/sysdeps/unix/sysv/linux/timer_routines.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
/* Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
@ -27,6 +27,13 @@
#include "kernel-posix-timers.h"
struct thread_start_data
{
void (*thrfunc) (sigval_t);
sigval_t sival;
};
#ifdef __NR_timer_create
/* Helper thread to call the user-provided function. */
static void *
@ -40,10 +47,16 @@ timer_sigev_thread (void *arg)
INTERNAL_SYSCALL_DECL (err);
INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &ss, NULL, _NSIG / 8);
struct timer *tk = (struct timer *) arg;
struct thread_start_data *td = (struct thread_start_data *) arg;
void (*thrfunc) (sigval_t) = td->thrfunc;
sigval_t sival = td->sival;
/* The TD object was allocated in timer_helper_thread. */
free (td);
/* Call the user-provided function. */
tk->thrfunc (tk->sival);
thrfunc (sival);
return NULL;
}
@ -82,10 +95,19 @@ timer_helper_thread (void *arg)
if (si.si_code == SI_TIMER)
{
struct timer *tk = (struct timer *) si.si_ptr;
struct thread_start_data *td = malloc (sizeof (*td));
/* That the signal we are waiting for. */
pthread_t th;
(void) pthread_create (&th, &tk->attr, timer_sigev_thread, tk);
/* There is not much we can do if the allocation fails. */
if (td != NULL)
{
/* That is the signal we are waiting for. */
td->thrfunc = tk->thrfunc;
td->sival = tk->sival;
pthread_t th;
(void) pthread_create (&th, &tk->attr, timer_sigev_thread,
td);
}
}
else if (si.si_code == SI_TKILL)
/* The thread is canceled. */