xnu-792.tar.gz

[apple/xnu.git] / osfmk / kern / thread_swap.c

diff --git a/osfmk/kern/thread_swap.c b/osfmk/kern/thread_swap.c
deleted file mode 100644 (file)
index 159abcb..0000000
--- a/osfmk/kern/thread_swap.c
+++ /dev/null
@@ -1,195 +0,0 @@
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * @OSF_COPYRIGHT@
- */
-/*
- * Mach Operating System
- * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
- * All Rights Reserved.
- * 
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- * 
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- * 
- * Carnegie Mellon requests users of this software to return to
- * 
- *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
- *  School of Computer Science
- *  Carnegie Mellon University
- *  Pittsburgh PA 15213-3890
- * 
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- */
-/*
- */
-
-#include <kern/thread.h>
-#include <kern/lock.h>
-#include <vm/vm_map.h>
-#include <vm/vm_kern.h>
-#include <mach/vm_param.h>
-#include <kern/sched_prim.h>
-#include <kern/processor.h>
-#include <kern/thread_swap.h>
-#include <kern/spl.h>          /* for splsched */
-#include <kern/misc_protos.h>
-#include <kern/counters.h>
-#include <mach/policy.h>
-
-queue_head_t           swapin_queue;
-decl_simple_lock_data(,swapin_lock)
-
-mach_counter_t c_swapin_thread_block;
-
-void   swapin_thread(void);
-
-/*
- *     swapin_init: [exported]
- *
- *     Initialize the swapper module.
- */
-void
-swapin_init(void)
-{
-        queue_init(&swapin_queue);
-        simple_lock_init(&swapin_lock, ETAP_THREAD_SWAPPER);
-        kernel_thread_with_priority(swapin_thread, MINPRI_KERNEL);
-}
-
-/*
- *     thread_swapin: [exported]
- *
- *     Place the specified thread in the list of threads to swapin.
- *     Called with thread locked, returned unlocked.
- */
-
-void
-thread_swapin(
-       register thread_t       thread)
-{
-       switch (thread->state & TH_STACK_STATE) {
-
-       case TH_STACK_HANDOFF:
-               /*
-                *      Swapped out.
-                */
-               thread->state = (thread->state & ~TH_STACK_STATE) | TH_STACK_ALLOC;
-               thread_unlock(thread);
-               simple_lock(&swapin_lock);
-               enqueue_tail(&swapin_queue, (queue_entry_t) thread);
-               simple_unlock(&swapin_lock);
-               thread_wakeup((event_t)&swapin_queue);
-               break;
-
-       case TH_STACK_ALLOC:
-               /*
-                *      Already queued.
-                */
-               thread_unlock(thread);
-               break;
-
-       default:
-               /*
-                *      Already swapped in.
-                */
-               panic("thread_swapin");
-       }
-}
-
-/*
- *     thread_doswapin:
- *
- *     Swapin the specified thread, if it should be runnable, then put
- *     it on a run queue.
- */
-void
-thread_doswapin(
-       register thread_t       thread)
-{
-       vm_offset_t             stack;
-       spl_t                   s;
-
-       /*
-        *      Allocate the kernel stack.
-        */
-       stack = stack_alloc(thread, thread_continue);
-       assert(stack);
-
-       /*
-        *      Place on run queue.  
-        */
-       s = splsched();
-       thread_lock(thread);
-       thread->state &= ~(TH_STACK_HANDOFF | TH_STACK_ALLOC);
-       if (thread->state & TH_RUN)
-               thread_setrun(thread, SCHED_PREEMPT | SCHED_TAILQ);
-       thread_unlock(thread);
-       (void) splx(s);
-}
-
-/*
- *     swapin_thread: [exported]
- *
- *     This procedure executes as a kernel thread.  Threads that need to
- *     be swapped in are swapped in by this thread.
- */
-void
-swapin_thread_continue(void)
-{
-       register thread_t       thread;
-
-       (void)splsched();
-       simple_lock(&swapin_lock);
-
-       while ((thread = (thread_t)dequeue_head(&swapin_queue)) != THREAD_NULL) {
-               simple_unlock(&swapin_lock);
-               (void)spllo();
-
-               thread_doswapin(thread);
-
-               (void)splsched();
-               simple_lock(&swapin_lock);
-       }
-
-       assert_wait((event_t)&swapin_queue, THREAD_UNINT);
-       simple_unlock(&swapin_lock);
-       (void)spllo();
-
-       counter(c_swapin_thread_block++);
-       thread_block(swapin_thread_continue);
-       /*NOTREACHED*/
-}
-
-void
-swapin_thread(void)
-{
-       swapin_thread_continue();
-       /*NOTREACHED*/
-}