fix some const warnings.

more sync with freebsd.

8 files changed, 131 insertions, 43 deletions

diff --git a/lib/libpthread/uthread/pthread_private.h b/lib/libpthread/uthread/pthread_private.h
index e0436a477ea..3d38ad4c668 100644
--- a/lib/libpthread/uthread/pthread_private.h
+++ b/lib/libpthread/uthread/pthread_private.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pthread_private.h,v 1.25 2001/08/29 18:33:54 fgsch Exp $	*/
+/*	$OpenBSD: pthread_private.h,v 1.26 2001/08/30 07:40:47 fgsch Exp $	*/
 /*
  * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>.
  * All rights reserved.
@@ -646,12 +646,6 @@ struct pthread {
 	long	slice_usec;
 
 	/*
-	 * Incremental priority accumulated by thread while it is ready to
-	 * run but is denied being run.
-	 */
-	int	inc_prio;
-
-	/*
 	 * Time to wake up thread. This is used for sleeping threads and
 	 * for any operation which may time out (such as select).
 	 */
@@ -879,9 +873,6 @@ SCLASS unsigned int volatile	_sched_ticks
 ;
 #endif
 
-/* Last time that an incremental priority update was performed: */
-extern struct timeval   kern_inc_prio_time;
-
 /* Dead threads: */
 SCLASS _thread_list_t		_dead_list
 #ifdef GLOBAL_PTHREAD_PRIVATE
@@ -985,6 +976,13 @@ SCLASS	pthread_cond_t  _gc_cond
 SCLASS struct  sigaction _thread_sigact[NSIG];
 
 /*
+ * Array of counts of dummy handlers for SIG_DFL signals.  This is used to
+ * assure that there is always a dummy signal handler installed while there is a
+ * thread sigwait()ing on the corresponding signal.
+ */
+SCLASS int	_thread_dfl_count[NSIG];
+
+/*
  * Scheduling queues:
  */
 SCLASS pq_queue_t		_readyq;
@@ -1069,7 +1067,7 @@ void    _thread_cleanupspecific(void);
 void    _thread_dump_info(void);
 void    _thread_init(void);
 void    _thread_kern_sched(struct sigcontext *);
-void    _thread_kern_sched_state(enum pthread_state,const char *fname,int lineno);
+void    _thread_kern_sched_state(enum pthread_state,char *fname,int lineno);
 void	_thread_kern_sched_state_unlock(enum pthread_state state,
 	    spinlock_t *lock, char *fname, int lineno);
 void    _thread_kern_set_timeout(const struct timespec *);
diff --git a/lib/libpthread/uthread/uthread_cancel.c b/lib/libpthread/uthread/uthread_cancel.c
index 7428ee07ecb..7b157c2b53e 100644
--- a/lib/libpthread/uthread/uthread_cancel.c
+++ b/lib/libpthread/uthread/uthread_cancel.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uthread_cancel.c,v 1.3 2001/08/21 19:24:53 fgsch Exp $	*/
+/*	$OpenBSD: uthread_cancel.c,v 1.4 2001/08/30 07:40:47 fgsch Exp $	*/
 /*
  * David Leonard <d@openbsd.org>, 1999. Public domain.
  */
@@ -12,7 +12,10 @@ pthread_cancel(pthread)
 {
 	int ret;
 
-	if ((ret = _find_thread(pthread))) {
+	if ((ret = _find_thread(pthread)) != 0) {
+		/* NOTHING */
+	} else if (pthread->state == PS_DEAD || pthread->state == PS_DEADLOCK) {
+		ret = 0;
 	} else if ((pthread->flags & PTHREAD_FLAGS_CANCELED) == 0) {
 		/* Set the thread's I've-been-cancelled flag: */
 		pthread->flags |= PTHREAD_FLAGS_CANCELED;
diff --git a/lib/libpthread/uthread/uthread_fd.c b/lib/libpthread/uthread/uthread_fd.c
index b49a3cda8fb..519ba114fc3 100644
--- a/lib/libpthread/uthread/uthread_fd.c
+++ b/lib/libpthread/uthread/uthread_fd.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uthread_fd.c,v 1.7 2001/08/21 19:24:53 fgsch Exp $	*/
+/*	$OpenBSD: uthread_fd.c,v 1.8 2001/08/30 07:40:47 fgsch Exp $	*/
 /*
  * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
  * All rights reserved.
@@ -453,7 +453,7 @@ _thread_fd_lock(int fd, int lock_type, struct timespec * timeout)
 }
 
 void
-_thread_fd_unlock_debug(int fd, int lock_type, const char *fname, int lineno)
+_thread_fd_unlock_debug(int fd, int lock_type, char *fname, int lineno)
 {
 	struct pthread	*curthread = _get_curthread();
 	int	ret;
@@ -577,7 +577,7 @@ _thread_fd_unlock_debug(int fd, int lock_type, const char *fname, int lineno)
 
 int
 _thread_fd_lock_debug(int fd, int lock_type, struct timespec * timeout,
-		const char *fname, int lineno)
+		char *fname, int lineno)
 {
 	struct pthread	*curthread = _get_curthread();
 	int	ret;
diff --git a/lib/libpthread/uthread/uthread_file.c b/lib/libpthread/uthread/uthread_file.c
index bcdecff65e2..41815aeeac8 100644
--- a/lib/libpthread/uthread/uthread_file.c
+++ b/lib/libpthread/uthread/uthread_file.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uthread_file.c,v 1.5 2000/01/06 07:17:01 d Exp $	*/
+/*	$OpenBSD: uthread_file.c,v 1.6 2001/08/30 07:40:47 fgsch Exp $	*/
 /*
  * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
  * All rights reserved.
@@ -180,7 +180,7 @@ do_lock(int idx, FILE *fp)
 }
 
 void
-_flockfile_debug(FILE * fp, const char *fname, int lineno)
+_flockfile_debug(FILE * fp, char *fname, int lineno)
 {
 	int	idx = file_idx(fp);
 	struct	file_lock	*p;
diff --git a/lib/libpthread/uthread/uthread_init.c b/lib/libpthread/uthread/uthread_init.c
index edf87469bd0..dec4cdace6d 100644
--- a/lib/libpthread/uthread/uthread_init.c
+++ b/lib/libpthread/uthread/uthread_init.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uthread_init.c,v 1.13 2001/08/29 18:33:54 fgsch Exp $	*/
+/*	$OpenBSD: uthread_init.c,v 1.14 2001/08/30 07:40:47 fgsch Exp $	*/
 /*
  * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
  * All rights reserved.
@@ -57,7 +57,6 @@
 #include "pthread_private.h"
 
 /* Global thread variables. */
-struct timeval	kern_inc_prio_time = { 0, 0 };
 _stack_list_t	_stackq;
 
 extern int _thread_autoinit_dummy_decl;
@@ -175,6 +174,10 @@ _thread_init(void)
 		 */
 		_thread_initial->magic = PTHREAD_MAGIC;
 
+		/* Set the initial cancel state */
+		_thread_initial->cancelstate = PTHREAD_CANCEL_ENABLE;
+		_thread_initial->canceltype = PTHREAD_CANCEL_DEFERRED;
+
 		/* Default the priority of the initial thread: */
 		_thread_initial->base_priority = PTHREAD_DEFAULT_PRIORITY;
 		_thread_initial->active_priority = PTHREAD_DEFAULT_PRIORITY;
@@ -204,12 +207,10 @@ _thread_init(void)
 		_thread_initial->cleanup = NULL;
 		_thread_initial->flags = 0;
 		_thread_initial->error = 0;
-		_thread_initial->cancelstate = PTHREAD_CANCEL_ENABLE;
-		_thread_initial->canceltype = PTHREAD_CANCEL_DEFERRED;
 		_SPINLOCK_INIT(&_thread_initial->lock);
 		TAILQ_INIT(&_thread_list);
 		TAILQ_INSERT_HEAD(&_thread_list, _thread_initial, tle);
-		_thread_run = _thread_initial;
+		_set_curthread(_thread_initial);
 
 		/* Initialise the global signal action structure: */
 		sigfillset(&act.sa_mask);
@@ -227,13 +228,16 @@ _thread_init(void)
 
 			/* Get the signal handler details: */
 			else if (_thread_sys_sigaction(i, NULL,
-						       &_thread_sigact[i - 1]) != 0) {
+			    &_thread_sigact[i - 1]) != 0) {
 				/*
 				 * Abort this process if signal
 				 * initialisation fails: 
 				 */
 				PANIC("Cannot read signal handler info");
 			}
+
+			/* Initialize the SIG_DFL dummy handler count. */
+			_thread_dfl_count[i] = 0;
 		}
 
 		/*
@@ -308,10 +312,6 @@ _thread_init(void)
 	    pthread_cond_init(&_gc_cond,NULL) != 0)
 		PANIC("Failed to initialise garbage collector mutex or condvar");
 
-	gettimeofday(&kern_inc_prio_time, NULL);
-
 	_thread_autoinit_dummy_decl = 0;
-
-	return;
 }
 #endif
diff --git a/lib/libpthread/uthread/uthread_kern.c b/lib/libpthread/uthread/uthread_kern.c
index 2376af06534..626a8004b5f 100644
--- a/lib/libpthread/uthread/uthread_kern.c
+++ b/lib/libpthread/uthread/uthread_kern.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uthread_kern.c,v 1.13 2001/08/21 19:24:53 fgsch Exp $	*/
+/*	$OpenBSD: uthread_kern.c,v 1.14 2001/08/30 07:40:47 fgsch Exp $	*/
 /*
  * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
  * All rights reserved.
@@ -579,7 +579,7 @@ _thread_kern_sched(struct sigcontext * scp)
 }
 
 void
-_thread_kern_sched_state(enum pthread_state state, const char *fname, int lineno)
+_thread_kern_sched_state(enum pthread_state state, char *fname, int lineno)
 {
 	struct pthread	*curthread = _get_curthread();
 
diff --git a/lib/libpthread/uthread/uthread_spinlock.c b/lib/libpthread/uthread/uthread_spinlock.c
index 418ddcf3427..c958c463383 100644
--- a/lib/libpthread/uthread/uthread_spinlock.c
+++ b/lib/libpthread/uthread/uthread_spinlock.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uthread_spinlock.c,v 1.8 2001/08/21 19:24:53 fgsch Exp $	*/
+/*	$OpenBSD: uthread_spinlock.c,v 1.9 2001/08/30 07:40:47 fgsch Exp $	*/
 /*
  * Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>.
  * All rights reserved.
@@ -79,7 +79,7 @@ _spinlock(spinlock_t *lck)
  * returning.
  */
 void
-_spinlock_debug(spinlock_t *lck, const char *fname, int lineno)
+_spinlock_debug(spinlock_t *lck, char *fname, int lineno)
 {
 	struct pthread	*curthread = _get_curthread();
 	int cnt = 0;
diff --git a/lib/libpthread/uthread/uthread_suspend_np.c b/lib/libpthread/uthread/uthread_suspend_np.c
index 8c455e0a11d..1758766fecf 100644
--- a/lib/libpthread/uthread/uthread_suspend_np.c
+++ b/lib/libpthread/uthread/uthread_suspend_np.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uthread_suspend_np.c,v 1.4 1999/11/25 07:01:46 d Exp $	*/
+/*	$OpenBSD: uthread_suspend_np.c,v 1.5 2001/08/30 07:40:47 fgsch Exp $	*/
 /*
  * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>.
  * All rights reserved.
@@ -37,6 +37,8 @@
 #include <pthread.h>
 #include "pthread_private.h"
 
+static void	finish_suspension(void *arg);
+
 /* Suspend a thread: */
 int
 pthread_suspend_np(pthread_t thread)
@@ -45,22 +47,98 @@ pthread_suspend_np(pthread_t thread)
 
 	/* Find the thread in the list of active threads: */
 	if ((ret = _find_thread(thread)) == 0) {
-		/* The thread exists. Is it running? */
-		if (thread->state != PS_RUNNING &&
-		    thread->state != PS_SUSPENDED) {
-			/* The thread operation has been interrupted */
-			_thread_seterrno(thread,EINTR);
-			thread->interrupted = 1;
-		}
-
 		/*
 		 * Defer signals to protect the scheduling queues from
 		 * access by the signal handler:
 		 */
 		_thread_kern_sig_defer();
 
-		/* Suspend the thread. */
-		PTHREAD_NEW_STATE(thread,PS_SUSPENDED);
+		switch (thread->state) {
+		case PS_RUNNING:
+			/*
+			 * Remove the thread from the priority queue and
+			 * set the state to suspended:
+			 */
+			PTHREAD_PRIOQ_REMOVE(thread);
+			PTHREAD_SET_STATE(thread, PS_SUSPENDED);
+			break;
+
+		case PS_SPINBLOCK:
+		case PS_FDR_WAIT:
+		case PS_FDW_WAIT:
+		case PS_POLL_WAIT:
+		case PS_SELECT_WAIT:
+			/*
+			 * Remove these threads from the work queue
+			 * and mark the operation as interrupted:
+			 */
+			if ((thread->flags & PTHREAD_FLAGS_IN_WORKQ) != 0)
+				PTHREAD_WORKQ_REMOVE(thread);
+			_thread_seterrno(thread, EINTR);
+
+			/* FALLTHROUGH */
+		case PS_SLEEP_WAIT:
+			thread->interrupted = 1;
+
+			/* FALLTHROUGH */
+		case PS_SIGTHREAD:
+		case PS_WAIT_WAIT:
+		case PS_SIGSUSPEND:
+		case PS_SIGWAIT:
+			/*
+			 * Remove these threads from the waiting queue and
+			 * set their state to suspended:
+			 */
+			PTHREAD_WAITQ_REMOVE(thread);
+			PTHREAD_SET_STATE(thread, PS_SUSPENDED);
+			break;
+
+		case PS_MUTEX_WAIT:
+			/* Mark the thread as suspended and still in a queue. */
+			thread->suspended = SUSP_MUTEX_WAIT;
+
+			PTHREAD_SET_STATE(thread, PS_SUSPENDED);
+			break;
+		case PS_COND_WAIT:
+			/* Mark the thread as suspended and still in a queue. */
+			thread->suspended = SUSP_COND_WAIT;
+
+			PTHREAD_SET_STATE(thread, PS_SUSPENDED);
+			break;
+		case PS_JOIN:
+			/* Mark the thread as suspended and joining: */
+			thread->suspended = SUSP_JOIN;
+
+			PTHREAD_NEW_STATE(thread, PS_SUSPENDED);
+			break;
+		case PS_FDLR_WAIT:
+		case PS_FDLW_WAIT:
+		case PS_FILE_WAIT:
+			/* Mark the thread as suspended: */
+			thread->suspended = SUSP_YES;
+
+			/*
+			 * Threads in these states may be in queues.
+			 * In order to preserve queue integrity, the
+			 * cancelled thread must remove itself from the
+			 * queue.  Mark the thread as interrupted and
+			 * set the state to running.  When the thread
+			 * resumes, it will remove itself from the queue
+			 * and call the suspension completion routine.
+			 */
+			thread->interrupted = 1;
+			_thread_seterrno(thread, EINTR);
+			PTHREAD_NEW_STATE(thread, PS_RUNNING);
+			thread->continuation = finish_suspension;
+			break;
+
+		case PS_DEAD:
+		case PS_DEADLOCK:
+		case PS_STATE_MAX:
+		case PS_SUSPENDED:
+			/* Nothing needs to be done: */
+			break;
+		}
 
 		/*
 		 * Undefer and handle pending signals, yielding if
@@ -70,4 +148,13 @@ pthread_suspend_np(pthread_t thread)
 	}
 	return(ret);
 }
+
+static void
+finish_suspension(void *arg)
+{
+	struct pthread	*curthread = _get_curthread();
+
+	if (curthread->suspended != SUSP_NO)
+		_thread_kern_sched_state(PS_SUSPENDED, __FILE__, __LINE__);
+}
 #endif