[PATCH] timers for kFreeBSD
Hi,
Attached patch adds a new implementation of timers for kFreeBSD. It
is heavily based on the Linux/NPTL counterpart.
I've verified that this fixes #642112 (timer_settime fails on kfreebsd
when timeout approaches max(time_t)) and #662018 (No support for
CLOCK_MONOTONIC). It also addresses a great deal (but not all) of
#665287 (<bits/time.h> advertises unsupported clockid_t types).
It's also likely that it fixes some of the problems outlined in
http://lists.debian.org/debian-bsd/2012/03/msg00149.html
Review and testing is much welcome, please do if you can.
Please don't commit to glibc-bsd repository yet. I haven't finished
testing it myself.
Thanks
--
Robert Millan
--- /dev/null
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/linuxthreads/kernel-posix-timers.h
@@ -0,0 +1,72 @@
+/* Copyright (C) 2003, 2007 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 <pthread.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <sys/types.h>
+
+/* The signal used for asynchronous cancelation. */
+#define SIGCANCEL (SIGTHR+1)
+
+/* Signal needed for the kernel-supported POSIX timer implementation.
+ We can reuse the cancellation signal since we can distinguish
+ cancellation from timer expirations. */
+#define SIGTIMER SIGCANCEL
+
+/* Callback to start helper thread. */
+extern void __start_helper_thread (void) attribute_hidden;
+
+/* Control variable for helper thread creation. */
+extern pthread_once_t __helper_once attribute_hidden;
+
+/* Whether helper thread is running. */
+extern int __helper_is_running attribute_hidden;
+
+/* List of active SIGEV_THREAD timers. */
+extern struct timer *__active_timer_sigev_thread attribute_hidden;
+/* Lock for the __active_timer_sigev_thread. */
+extern pthread_mutex_t __active_timer_sigev_thread_lock attribute_hidden;
+
+
+/* Type of timers in the kernel. */
+typedef int kernel_timer_t;
+
+
+/* Internal representation of timer. */
+struct timer
+{
+ /* Notification mechanism. */
+ int sigev_notify;
+
+ /* Timer ID returned by the kernel. */
+ kernel_timer_t ktimerid;
+
+ /* All new elements must be added after ktimerid. And if the thrfunc
+ element is not the third element anymore the memory allocation in
+ timer_create needs to be changed. */
+
+ /* Parameters for the thread to be started for SIGEV_THREAD. */
+ void (*thrfunc) (sigval_t);
+ sigval_t sival;
+ pthread_attr_t attr;
+
+ /* Next element in list of active SIGEV_THREAD timers. */
+ struct timer *next;
+};
--- /dev/null
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/linuxthreads/timer_create.c
@@ -0,0 +1,232 @@
+/* Copyright (C) 2003,2004, 2007, 2009 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 <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+#include "kernel-posix-timers.h"
+#include "kernel-posix-cpu-timers.h"
+
+#define __ASSUME_POSIX_TIMERS 1
+
+#ifdef SYS_ktimer_create
+# ifndef __ASSUME_POSIX_TIMERS
+static int compat_timer_create (clockid_t clock_id, struct sigevent *evp,
+ timer_t *timerid);
+# define timer_create static compat_timer_create
+# include <nptl/sysdeps/pthread/timer_create.c>
+# undef timer_create
+
+/* Nonzero if the system calls are not available. */
+int __no_posix_timers attribute_hidden;
+# endif
+
+# ifdef timer_create_alias
+# define timer_create timer_create_alias
+# endif
+
+
+int
+timer_create (clock_id, evp, timerid)
+ clockid_t clock_id;
+ struct sigevent *evp;
+ timer_t *timerid;
+{
+# undef timer_create
+# ifndef __ASSUME_POSIX_TIMERS
+ if (__no_posix_timers >= 0)
+# endif
+ {
+ /* If the user wants notification via a thread we need to handle
+ this special. */
+ if (evp == NULL
+ || __builtin_expect (evp->sigev_notify != SIGEV_THREAD, 1))
+ {
+ struct sigevent local_evp;
+
+ /* We avoid allocating too much memory by basically
+ using struct timer as a derived class with the
+ first two elements being in the superclass. We only
+ need these two elements here. */
+ struct timer *newp = (struct timer *) malloc (offsetof (struct timer,
+ thrfunc));
+ if (newp == NULL)
+ /* No more memory. */
+ return -1;
+
+ if (evp == NULL)
+ {
+ /* The kernel has to pass up the timer ID which is a
+ userlevel object. Therefore we cannot leave it up to
+ the kernel to determine it. */
+ local_evp.sigev_notify = SIGEV_SIGNAL;
+ local_evp.sigev_signo = SIGALRM;
+ local_evp.sigev_value.sival_ptr = newp;
+
+ evp = &local_evp;
+ }
+
+ kernel_timer_t ktimerid;
+ int retval = INLINE_SYSCALL (ktimer_create, 3, clock_id, evp,
+ &ktimerid);
+
+# ifndef __ASSUME_POSIX_TIMERS
+ if (retval != -1 || errno != ENOSYS)
+# endif
+ {
+# ifndef __ASSUME_POSIX_TIMERS
+ __no_posix_timers = 1;
+# endif
+
+ if (retval != -1)
+ {
+ newp->sigev_notify = (evp != NULL
+ ? evp->sigev_notify : SIGEV_SIGNAL);
+ newp->ktimerid = ktimerid;
+
+ *timerid = (timer_t) newp;
+ }
+ else
+ {
+ /* Cannot allocate the timer, fail. */
+ free (newp);
+ retval = -1;
+ }
+
+ return retval;
+ }
+
+ free (newp);
+
+# ifndef __ASSUME_POSIX_TIMERS
+ /* When we come here the syscall does not exist. Make sure we
+ do not try to use it again. */
+ __no_posix_timers = -1;
+# endif
+ }
+ else
+ {
+# ifndef __ASSUME_POSIX_TIMERS
+ /* Make sure we have the necessary kernel support. */
+ if (__no_posix_timers == 0)
+ {
+ INTERNAL_SYSCALL_DECL (err);
+ struct timespec ts;
+ int res;
+ res = INTERNAL_SYSCALL (clock_getres, err, 2,
+ CLOCK_REALTIME, &ts);
+ __no_posix_timers = (INTERNAL_SYSCALL_ERROR_P (res, err)
+ ? -1 : 1);
+ }
+
+ if (__no_posix_timers > 0)
+# endif
+ {
+ /* Create the helper thread. */
+ pthread_once (&__helper_once, __start_helper_thread);
+ if (__helper_is_running == 0)
+ {
+ /* No resources to start the helper thread. */
+ __set_errno (EAGAIN);
+ return -1;
+ }
+
+ struct timer *newp;
+ newp = (struct timer *) malloc (sizeof (struct timer));
+ if (newp == NULL)
+ return -1;
+
+ /* Copy the thread parameters the user provided. */
+ newp->sival = evp->sigev_value;
+ newp->thrfunc = evp->sigev_notify_function;
+ newp->sigev_notify = SIGEV_THREAD;
+
+ /* We cannot simply copy the thread attributes since the
+ implementation might keep internal information for
+ each instance. */
+ (void) pthread_attr_init (&newp->attr);
+ if (evp->sigev_notify_attributes != NULL)
+ {
+ pthread_attr_t *nattr;
+ pthread_attr_t *oattr;
+
+ nattr = (pthread_attr_t *) &newp->attr;
+ oattr = (pthread_attr_t *) evp->sigev_notify_attributes;
+
+ nattr->__schedparam = oattr->__schedparam;
+ nattr->__schedpolicy = oattr->__schedpolicy;
+ nattr->__guardsize = oattr->__guardsize;
+ nattr->__stackaddr = oattr->__stackaddr;
+ nattr->__stacksize = oattr->__stacksize;
+ }
+
+ /* In any case set the detach flag. */
+ (void) pthread_attr_setdetachstate (&newp->attr,
+ PTHREAD_CREATE_DETACHED);
+
+ /* Create the event structure for the kernel timer. */
+ struct sigevent sev =
+ { .sigev_value.sival_ptr = newp,
+ .sigev_signo = SIGTIMER,
+ .sigev_notify = SIGEV_SIGNAL | SIGEV_THREAD_ID,
+ };
+
+ /* Create the timer. */
+ int res;
+ res = INLINE_SYSCALL (ktimer_create, 3,
+ clock_id, &sev, &newp->ktimerid);
+ if (res != -1)
+ {
+ /* Add to the queue of active timers with thread
+ delivery. */
+ pthread_mutex_lock (&__active_timer_sigev_thread_lock);
+ newp->next = __active_timer_sigev_thread;
+ __active_timer_sigev_thread = newp;
+ pthread_mutex_unlock (&__active_timer_sigev_thread_lock);
+
+ *timerid = (timer_t) newp;
+ return 0;
+ }
+
+ /* Free the resources. */
+ free (newp);
+
+ return -1;
+ }
+ }
+ }
+
+# ifndef __ASSUME_POSIX_TIMERS
+ /* Compatibility code. */
+ return compat_timer_create (clock_id, evp, timerid);
+# endif
+}
+#else
+# ifdef timer_create_alias
+# define timer_create timer_create_alias
+# endif
+/* The new system calls are not available. Use the userlevel
+ implementation. */
+# include <nptl/sysdeps/pthread/timer_create.c>
+#endif
--- /dev/null
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/linuxthreads/timer_delete.c
@@ -0,0 +1,116 @@
+/* Copyright (C) 2003, 2007 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 <errno.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+#include "kernel-posix-timers.h"
+
+#define __ASSUME_POSIX_TIMERS 1
+
+#ifdef SYS_ktimer_delete
+# ifndef __ASSUME_POSIX_TIMERS
+static int compat_timer_delete (timer_t timerid);
+# define timer_delete static compat_timer_delete
+# include <nptl/sysdeps/pthread/timer_delete.c>
+# undef timer_delete
+# endif
+
+# ifdef timer_delete_alias
+# define timer_delete timer_delete_alias
+# endif
+
+
+int
+timer_delete (timerid)
+ timer_t timerid;
+{
+# undef timer_delete
+# ifndef __ASSUME_POSIX_TIMERS
+ if (__no_posix_timers >= 0)
+# endif
+ {
+ struct timer *kt = (struct timer *) timerid;
+
+ /* Delete the kernel timer object. */
+ int res = INLINE_SYSCALL (ktimer_delete, 1, kt->ktimerid);
+
+ if (res == 0)
+ {
+ if (kt->sigev_notify == SIGEV_THREAD)
+ {
+ /* Remove the timer from the list. */
+ pthread_mutex_lock (&__active_timer_sigev_thread_lock);
+ if (__active_timer_sigev_thread == kt)
+ __active_timer_sigev_thread = kt->next;
+ else
+ {
+ struct timer *prevp = __active_timer_sigev_thread;
+ while (prevp->next != NULL)
+ if (prevp->next == kt)
+ {
+ prevp->next = kt->next;
+ break;
+ }
+ else
+ prevp = prevp->next;
+ }
+ pthread_mutex_unlock (&__active_timer_sigev_thread_lock);
+ }
+
+# ifndef __ASSUME_POSIX_TIMERS
+ /* We know the syscall support is available. */
+ __no_posix_timers = 1;
+# endif
+
+ /* Free the memory. */
+ (void) free (kt);
+
+ return 0;
+ }
+
+ /* The kernel timer is not known or something else bad happened.
+ Return the error. */
+# ifndef __ASSUME_POSIX_TIMERS
+ if (errno != ENOSYS)
+ {
+ __no_posix_timers = 1;
+# endif
+ return -1;
+# ifndef __ASSUME_POSIX_TIMERS
+ }
+
+ __no_posix_timers = -1;
+# endif
+ }
+
+# ifndef __ASSUME_POSIX_TIMERS
+ return compat_timer_delete (timerid);
+# endif
+}
+#else
+# ifdef timer_delete_alias
+# define timer_delete timer_delete_alias
+# endif
+/* The new system calls are not available. Use the userlevel
+ implementation. */
+# include <nptl/sysdeps/pthread/timer_delete.c>
+#endif
--- /dev/null
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/linuxthreads/timer_gettime.c
@@ -0,0 +1,84 @@
+/* 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 <errno.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+#include "kernel-posix-timers.h"
+
+#define __ASSUME_POSIX_TIMERS 1
+
+#ifdef SYS_ktimer_gettime
+# ifndef __ASSUME_POSIX_TIMERS
+static int compat_timer_gettime (timer_t timerid, struct itimerspec *value);
+# define timer_gettime static compat_timer_gettime
+# include <nptl/sysdeps/pthread/timer_gettime.c>
+# undef timer_gettime
+# endif
+
+# ifdef timer_gettime_alias
+# define timer_gettime timer_gettime_alias
+# endif
+
+
+int
+timer_gettime (timerid, value)
+ timer_t timerid;
+ struct itimerspec *value;
+{
+# undef timer_gettime
+# ifndef __ASSUME_POSIX_TIMERS
+ if (__no_posix_timers >= 0)
+# endif
+ {
+ struct timer *kt = (struct timer *) timerid;
+
+ /* Delete the kernel timer object. */
+ int res = INLINE_SYSCALL (ktimer_gettime, 2, kt->ktimerid, value);
+
+# ifndef __ASSUME_POSIX_TIMERS
+ if (res != -1 || errno != ENOSYS)
+ {
+ /* We know the syscall support is available. */
+ __no_posix_timers = 1;
+# endif
+ return res;
+# ifndef __ASSUME_POSIX_TIMERS
+ }
+# endif
+
+# ifndef __ASSUME_POSIX_TIMERS
+ __no_posix_timers = -1;
+# endif
+ }
+
+# ifndef __ASSUME_POSIX_TIMERS
+ return compat_timer_gettime (timerid, value);
+# endif
+}
+#else
+# ifdef timer_gettime_alias
+# define timer_gettime timer_gettime_alias
+# endif
+/* The new system calls are not available. Use the userlevel
+ implementation. */
+# include <nptl/sysdeps/pthread/timer_gettime.c>
+#endif
--- /dev/null
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/linuxthreads/timer_settime.c
@@ -0,0 +1,90 @@
+/* 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 <errno.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+#include "kernel-posix-timers.h"
+
+
+#define __ASSUME_POSIX_TIMERS 1
+
+#ifdef SYS_ktimer_settime
+# ifndef __ASSUME_POSIX_TIMERS
+static int compat_timer_settime (timer_t timerid, int flags,
+ const struct itimerspec *value,
+ struct itimerspec *ovalue);
+# define timer_settime static compat_timer_settime
+# include <nptl/sysdeps/pthread/timer_settime.c>
+# undef timer_settime
+# endif
+
+# ifdef timer_settime_alias
+# define timer_settime timer_settime_alias
+# endif
+
+
+int
+timer_settime (timerid, flags, value, ovalue)
+ timer_t timerid;
+ int flags;
+ const struct itimerspec *value;
+ struct itimerspec *ovalue;
+{
+# undef timer_settime
+# ifndef __ASSUME_POSIX_TIMERS
+ if (__no_posix_timers >= 0)
+# endif
+ {
+ struct timer *kt = (struct timer *) timerid;
+
+ /* Delete the kernel timer object. */
+ int res = INLINE_SYSCALL (ktimer_settime, 4, kt->ktimerid, flags,
+ value, ovalue);
+
+# ifndef __ASSUME_POSIX_TIMERS
+ if (res != -1 || errno != ENOSYS)
+ {
+ /* We know the syscall support is available. */
+ __no_posix_timers = 1;
+# endif
+ return res;
+# ifndef __ASSUME_POSIX_TIMERS
+ }
+# endif
+
+# ifndef __ASSUME_POSIX_TIMERS
+ __no_posix_timers = -1;
+# endif
+ }
+
+# ifndef __ASSUME_POSIX_TIMERS
+ return compat_timer_settime (timerid, flags, value, ovalue);
+# endif
+}
+#else
+# ifdef timer_settime_alias
+# define timer_settime timer_settime_alias
+# endif
+/* The new system calls are not available. Use the userlevel
+ implementation. */
+# include <nptl/sysdeps/pthread/timer_settime.c>
+#endif
--- a/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/syscalls.list
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/syscalls.list
@@ -18,6 +18,11 @@
sys_clock_getres - clock_getres i:ip __syscall_clock_getres
sys_clock_gettime - clock_gettime i:ip __syscall_clock_gettime
sys_clock_settime - clock_settime i:ip __syscall_clock_settime
+sys_ktimer_create - ktimer_create i:iPp __syscall_ktimer_create
+sys_ktimer_gettime - ktimer_gettime i:ip __syscall_ktimer_gettime
+sys_ktimer_settime - ktimer_settime i:ip __syscall_ktimer_settime
+sys_ktimer_getoverrun - ktimer_getoverrun i:i __syscall_ktimer_getoverrun
+sys_ktimer_delete - ktimer_delete i:i __syscall_ktimer_delete
sys_execve - execve i:ppp __syscall_execve
extattrctl - extattrctl i:sisI extattrctl
extattr_delete_file - extattr_delete_file i:ss extattr_delete_file
--- a/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/Makefile
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/Makefile
@@ -90,6 +90,7 @@
# for INLINE_SYSCALL
sysdep_routines += sys_fork sys_execve sys_sigaction sys_close sys_fcntl
sysdep_routines += sys_clock_getres sys_clock_gettime sys_clock_settime
+sysdep_routines += sys_ktimer_create sys_ktimer_gettime sys_ktimer_settime sys_ktimer_getoverrun sys_ktimer_delete
sysdep_routines += sys_shm_open sys_shm_unlink sys_pselect sys_semctl
endif
--- a/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/Versions
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/Versions
@@ -108,6 +108,7 @@
__syscall_wait4; __syscall_fcntl;
# needed by librt as INLINE_SYSCALL:
__syscall_clock_getres; __syscall_clock_gettime; __syscall_clock_settime;
+ __syscall_ktimer_create; __syscall_ktimer_gettime; __syscall_ktimer_settime; __syscall_ktimer_getoverrun; __syscall_ktimer_delete;
__syscall_shm_open; __syscall_shm_unlink;
# misc fixes for FreeBSD:
__syscall_freebsd6_lseek; __syscall_freebsd6_pread; __syscall_freebsd6_pwrite;
--- a/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/bits/signum.h
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/bits/signum.h
@@ -65,6 +65,8 @@
#define SIGINFO 29 /* Information request (4.4 BSD). */
#define SIGUSR1 30 /* User-defined signal 1 (POSIX). */
#define SIGUSR2 31 /* User-defined signal 2 (POSIX). */
+#define SIGTHR 32 /* Reserved by thread library. */
+#define SIGLWP SIGTHR
#define _NSIG 129 /* Biggest signal number + 1
(including real-time signals). */
--- a/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/linuxthreads/Makefile
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/linuxthreads/Makefile
@@ -2,3 +2,7 @@
sysdep_routines += register-atfork unregister-atfork
libpthread-routines += ptw-sigprocmask ptw-ioctl
endif
+
+ifeq ($(subdir),rt)
+librt-sysdep_routines += timer_routines
+endif
--- /dev/null
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/linuxthreads/timer_routines.c
@@ -0,0 +1,200 @@
+/* Copyright (C) 2003, 2004, 2005, 2006, 2007 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 <errno.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <sysdep.h>
+#include <linuxthreads/internals.h> /* LIBC_CANCEL_ASYNC */
+#include <kernel-features.h>
+#include "kernel-posix-timers.h"
+
+#define __ASSUME_POSIX_TIMERS 1
+
+/* List of active SIGEV_THREAD timers. */
+struct timer *__active_timer_sigev_thread;
+/* Lock for the __active_timer_sigev_thread. */
+pthread_mutex_t __active_timer_sigev_thread_lock = PTHREAD_MUTEX_INITIALIZER;
+
+
+struct thread_start_data
+{
+ void (*thrfunc) (sigval_t);
+ sigval_t sival;
+};
+
+
+#ifdef SYS_ktimer_create
+/* Helper thread to call the user-provided function. */
+static void *
+timer_sigev_thread (void *arg)
+{
+ /* The parent thread has all signals blocked. This is a bit
+ surprising for user code, although valid. We unblock all
+ signals. */
+ sigset_t ss;
+ sigemptyset (&ss);
+ sigprocmask (SIG_SETMASK, &ss, NULL);
+
+ 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. */
+ thrfunc (sival);
+
+ return NULL;
+}
+
+
+/* Helper function to support starting threads for SIGEV_THREAD. */
+static void *
+timer_helper_thread (void *arg)
+{
+ /* Wait for the SIGTIMER signal, allowing the setXid signal, and
+ none else. */
+ sigset_t ss;
+ sigemptyset (&ss);
+ __sigaddset (&ss, SIGTIMER);
+
+ /* Endless loop of waiting for signals. The loop is only ended when
+ the thread is canceled. */
+ while (1)
+ {
+ siginfo_t si;
+
+ /* sigwaitinfo cannot be used here, since it deletes
+ SIGCANCEL == SIGTIMER from the set. */
+
+ int oldtype = LIBC_CANCEL_ASYNC ();
+
+ /* XXX The size argument hopefully will have to be changed to the
+ real size of the user-level sigset_t. */
+ int result = sigtimedwait (&ss, &si, NULL);
+
+ LIBC_CANCEL_RESET (oldtype);
+
+ if (result > 0)
+ {
+ if (si.si_code == SI_TIMER)
+ {
+ struct timer *tk = (struct timer *) si.si_value.sival_ptr;
+
+ /* Check the timer is still used and will not go away
+ while we are reading the values here. */
+ pthread_mutex_lock (&__active_timer_sigev_thread_lock);
+
+ struct timer *runp = __active_timer_sigev_thread;
+ while (runp != NULL)
+ if (runp == tk)
+ break;
+ else
+ runp = runp->next;
+
+ if (runp != NULL)
+ {
+ struct thread_start_data *td = malloc (sizeof (*td));
+
+ /* There is not much we can do if the allocation fails. */
+ if (td != NULL)
+ {
+ /* This 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);
+ }
+ }
+
+ pthread_mutex_unlock (&__active_timer_sigev_thread_lock);
+ }
+ else if (si.si_code == SI_LWP)
+ /* The thread is canceled. */
+ pthread_exit (NULL);
+ }
+ }
+}
+
+
+/* Control variable for helper thread creation. */
+pthread_once_t __helper_once attribute_hidden;
+
+
+/* TID of the helper thread. */
+int __helper_is_running attribute_hidden;
+
+
+/* Reset variables so that after a fork a new helper thread gets started. */
+static void
+reset_helper_control (void)
+{
+ __helper_once = PTHREAD_ONCE_INIT;
+ __helper_is_running = 0;
+}
+
+void
+attribute_hidden
+__start_helper_thread (void)
+{
+ /* The helper thread needs only very little resources
+ and should go away automatically when canceled. */
+ pthread_attr_t attr;
+ (void) pthread_attr_init (&attr);
+ (void) pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);
+
+ /* Block all signals in the helper thread but SIGSETXID. To do this
+ thoroughly we temporarily have to block all signals here. The
+ helper can lose wakeups if SIGCANCEL is not blocked throughout,
+ but sigfillset omits it SIGSETXID. So, we add SIGCANCEL back
+ explicitly here. */
+ sigset_t ss;
+ sigset_t oss;
+ sigfillset (&ss);
+ __sigaddset (&ss, SIGCANCEL);
+ sigprocmask (SIG_SETMASK, &ss, &oss);
+
+ /* Create the helper thread for this timer. */
+ pthread_t th;
+ int res = pthread_create (&th, &attr, timer_helper_thread, NULL);
+ if (res == 0)
+ /* We managed to start the helper thread. */
+ __helper_is_running = 1;
+
+ /* Restore the signal mask. */
+ sigprocmask (SIG_SETMASK, &oss, NULL);
+
+ /* No need for the attribute anymore. */
+ (void) pthread_attr_destroy (&attr);
+
+ /* We have to make sure that after fork()ing a new helper thread can
+ be created. */
+ pthread_atfork (NULL, NULL, reset_helper_control);
+}
+#endif
+
+#ifndef __ASSUME_POSIX_TIMERS
+# include <nptl/sysdeps/pthread/timer_routines.c>
+#endif
--- a/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/bits/siginfo.h
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/bits/siginfo.h
@@ -69,6 +69,8 @@
# define SI_QUEUE SI_QUEUE
SI_USER = 0x10001, /* Sent by kill, sigsend, raise. */
# define SI_USER SI_USER
+ SI_LWP = 0x10007, /* Sent by thr_kill. */
+# define SI_LWP SI_LWP
SI_UNDEFINED = 0
# define SI_UNDEFINED SI_UNDEFINED
};
--- /dev/null
+++ b/ports/sysdeps/unix/bsd/bsd4.4/kfreebsd/linuxthreads/timer_getoverr.c
@@ -0,0 +1,82 @@
+/* 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 <errno.h>
+#include <time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+#include "kernel-posix-timers.h"
+
+#define __ASSUME_POSIX_TIMERS 1
+
+#ifdef SYS_ktimer_getoverrun
+# ifndef __ASSUME_POSIX_TIMERS
+static int compat_timer_getoverrun (timer_t timerid);
+# define timer_getoverrun static compat_timer_getoverrun
+# include <nptl/sysdeps/pthread/timer_getoverr.c>
+# undef timer_getoverrun
+# endif
+
+# ifdef timer_getoverrun_alias
+# define timer_getoverrun timer_getoverrun_alias
+# endif
+
+
+int
+timer_getoverrun (timerid)
+ timer_t timerid;
+{
+# undef timer_getoverrun
+# ifndef __ASSUME_POSIX_TIMERS
+ if (__no_posix_timers >= 0)
+# endif
+ {
+ struct timer *kt = (struct timer *) timerid;
+
+ /* Get the information from the kernel. */
+ int res = INLINE_SYSCALL (ktimer_getoverrun, 1, kt->ktimerid);
+
+# ifndef __ASSUME_POSIX_TIMERS
+ if (res != -1 || errno != ENOSYS)
+ {
+ /* We know the syscall support is available. */
+ __no_posix_timers = 1;
+# endif
+ return res;
+# ifndef __ASSUME_POSIX_TIMERS
+ }
+# endif
+
+# ifndef __ASSUME_POSIX_TIMERS
+ __no_posix_timers = -1;
+# endif
+ }
+
+# ifndef __ASSUME_POSIX_TIMERS
+ return compat_timer_getoverrun (timerid);
+# endif
+}
+#else
+# ifdef timer_getoverrun_alias
+# define timer_getoverrun timer_getoverrun_alias
+# endif
+/* The new system calls are not available. Use the userlevel
+ implementation. */
+# include <nptl/sysdeps/pthread/timer_getoverr.c>
+#endif
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