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vm_pager.c (15583) vm_pager.c (15809)
1/*
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * The Mach Operating System project at Carnegie-Mellon University.
7 *
8 * Redistribution and use in source and binary forms, with or without

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56 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
57 * School of Computer Science
58 * Carnegie Mellon University
59 * Pittsburgh PA 15213-3890
60 *
61 * any improvements or extensions that they make and grant Carnegie the
62 * rights to redistribute these changes.
63 *
1/*
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * The Mach Operating System project at Carnegie-Mellon University.
7 *
8 * Redistribution and use in source and binary forms, with or without

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56 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
57 * School of Computer Science
58 * Carnegie Mellon University
59 * Pittsburgh PA 15213-3890
60 *
61 * any improvements or extensions that they make and grant Carnegie the
62 * rights to redistribute these changes.
63 *
64 * $Id: vm_pager.c,v 1.21 1995/12/14 09:55:11 phk Exp $
64 * $Id: vm_pager.c,v 1.22 1996/05/03 21:01:53 phk Exp $
65 */
66
67/*
68 * Paging space routine stubs. Emulates a matchmaker-like interface
69 * for builtin pagers.
70 */
71
72#include <sys/param.h>

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244
245vm_object_t
246vm_pager_object_lookup(pg_list, handle)
247 register struct pagerlst *pg_list;
248 void *handle;
249{
250 register vm_object_t object;
251
65 */
66
67/*
68 * Paging space routine stubs. Emulates a matchmaker-like interface
69 * for builtin pagers.
70 */
71
72#include <sys/param.h>

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244
245vm_object_t
246vm_pager_object_lookup(pg_list, handle)
247 register struct pagerlst *pg_list;
248 void *handle;
249{
250 register vm_object_t object;
251
252 for (object = pg_list->tqh_first; object != NULL; object = object->pager_object_list.tqe_next)
252 for (object = TAILQ_FIRST(pg_list); object != NULL; object = TAILQ_NEXT(object,pager_object_list))
253 if (object->handle == handle)
254 return (object);
255 return (NULL);
256}
257
258/*
259 * This routine loses a reference to the object -
260 * thus a reference must be gained before calling.

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283struct buf *
284getpbuf()
285{
286 int s;
287 struct buf *bp;
288
289 s = splbio();
290 /* get a bp from the swap buffer header pool */
253 if (object->handle == handle)
254 return (object);
255 return (NULL);
256}
257
258/*
259 * This routine loses a reference to the object -
260 * thus a reference must be gained before calling.

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283struct buf *
284getpbuf()
285{
286 int s;
287 struct buf *bp;
288
289 s = splbio();
290 /* get a bp from the swap buffer header pool */
291 while ((bp = bswlist.tqh_first) == NULL) {
291 while ((bp = TAILQ_FIRST(&bswlist)) == NULL) {
292 bswneeded = 1;
293 tsleep(&bswneeded, PVM, "wswbuf", 0);
294 }
295 TAILQ_REMOVE(&bswlist, bp, b_freelist);
296 splx(s);
297
298 bzero(bp, sizeof *bp);
299 bp->b_rcred = NOCRED;

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308 */
309struct buf *
310trypbuf()
311{
312 int s;
313 struct buf *bp;
314
315 s = splbio();
292 bswneeded = 1;
293 tsleep(&bswneeded, PVM, "wswbuf", 0);
294 }
295 TAILQ_REMOVE(&bswlist, bp, b_freelist);
296 splx(s);
297
298 bzero(bp, sizeof *bp);
299 bp->b_rcred = NOCRED;

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308 */
309struct buf *
310trypbuf()
311{
312 int s;
313 struct buf *bp;
314
315 s = splbio();
316 if ((bp = bswlist.tqh_first) == NULL) {
316 if ((bp = TAILQ_FIRST(&bswlist)) == NULL) {
317 splx(s);
318 return NULL;
319 }
320 TAILQ_REMOVE(&bswlist, bp, b_freelist);
321 splx(s);
322
323 bzero(bp, sizeof *bp);
324 bp->b_rcred = NOCRED;

--- 39 unchanged lines hidden --- 		317 splx(s);
318 return NULL;
319 }
320 TAILQ_REMOVE(&bswlist, bp, b_freelist);
321 splx(s);
322
323 bzero(bp, sizeof *bp);
324 bp->b_rcred = NOCRED;

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