1 /*-
2 * See the file LICENSE for redistribution information.
3 *
4 * Copyright (c) 1996, 1997, 1998
5 * Sleepycat Software. All rights reserved.
6 */
7 #include "config.h"
8
9 #ifndef lint
10 static const char sccsid[] = "@(#)mp_fset.c 10.16 (Sleepycat) 9/27/98";
11 #endif /* not lint */
12
13 #ifndef NO_SYSTEM_INCLUDES
14 #include <sys/types.h>
15
16 #include <errno.h>
17 #endif
18
19 #include "db_int.h"
20 #include "shqueue.h"
21 #include "db_shash.h"
22 #include "mp.h"
23 #include "common_ext.h"
24
25 /*
26 * memp_fset --
27 * Mpool page set-flag routine.
28 */
29 int
memp_fset(dbmfp,pgaddr,flags)30 memp_fset(dbmfp, pgaddr, flags)
31 DB_MPOOLFILE *dbmfp;
32 void *pgaddr;
33 u_int32_t flags;
34 {
35 BH *bhp;
36 DB_MPOOL *dbmp;
37 MPOOL *mp;
38 int ret;
39
40 dbmp = dbmfp->dbmp;
41 mp = dbmp->mp;
42
43 MP_PANIC_CHECK(dbmp);
44
45 /* Validate arguments. */
46 if (flags == 0)
47 return (__db_ferr(dbmp->dbenv, "memp_fset", 1));
48
49 if ((ret = __db_fchk(dbmp->dbenv, "memp_fset", flags,
50 DB_MPOOL_DIRTY | DB_MPOOL_CLEAN | DB_MPOOL_DISCARD)) != 0)
51 return (ret);
52 if ((ret = __db_fcchk(dbmp->dbenv, "memp_fset",
53 flags, DB_MPOOL_CLEAN, DB_MPOOL_DIRTY)) != 0)
54 return (ret);
55
56 if (LF_ISSET(DB_MPOOL_DIRTY) && F_ISSET(dbmfp, MP_READONLY)) {
57 __db_err(dbmp->dbenv,
58 "%s: dirty flag set for readonly file page",
59 __memp_fn(dbmfp));
60 return (EACCES);
61 }
62
63 /* Convert the page address to a buffer header. */
64 bhp = (BH *)((u_int8_t *)pgaddr - SSZA(BH, buf));
65
66 LOCKREGION(dbmp);
67
68 if (LF_ISSET(DB_MPOOL_CLEAN) && F_ISSET(bhp, BH_DIRTY)) {
69 ++mp->stat.st_page_clean;
70 --mp->stat.st_page_dirty;
71 F_CLR(bhp, BH_DIRTY);
72 }
73 if (LF_ISSET(DB_MPOOL_DIRTY) && !F_ISSET(bhp, BH_DIRTY)) {
74 --mp->stat.st_page_clean;
75 ++mp->stat.st_page_dirty;
76 F_SET(bhp, BH_DIRTY);
77 }
78 if (LF_ISSET(DB_MPOOL_DISCARD))
79 F_SET(bhp, BH_DISCARD);
80
81 UNLOCKREGION(dbmp);
82 return (0);
83 }
84