1 files changed, 0 insertions, 330 deletions
diff --git a/db2/mp/mp_region.c b/db2/mp/mp_region.c
deleted file mode 100644
index b9c92f2e13..0000000000
--- a/db2/mp/mp_region.c
+++ /dev/null
@@ -1,330 +0,0 @@
-/*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996, 1997, 1998
- *	Sleepycat Software.  All rights reserved.
- */
-#include "config.h"
-
-#ifndef lint
-static const char sccsid[] = "@(#)mp_region.c	10.35 (Sleepycat) 12/11/98";
-#endif /* not lint */
-
-#ifndef NO_SYSTEM_INCLUDES
-#include <sys/types.h>
-
-#include <errno.h>
-#include <string.h>
-#endif
-
-#include "db_int.h"
-#include "shqueue.h"
-#include "db_shash.h"
-#include "mp.h"
-#include "common_ext.h"
-
-/*
- * __memp_reg_alloc --
- *	Allocate some space in the mpool region, with locking.
- *
- * PUBLIC: int __memp_reg_alloc __P((DB_MPOOL *, size_t, size_t *, void *));
- */
-int
-__memp_reg_alloc(dbmp, len, offsetp, retp)
-	DB_MPOOL *dbmp;
-	size_t len, *offsetp;
-	void *retp;
-{
-	int ret;
-
-	LOCKREGION(dbmp);
-	ret = __memp_alloc(dbmp, len, offsetp, retp);
-	UNLOCKREGION(dbmp);
-	return (ret);
-}
-
-/*
- * __memp_alloc --
- *	Allocate some space in the mpool region.
- *
- * PUBLIC: int __memp_alloc __P((DB_MPOOL *, size_t, size_t *, void *));
- */
-int
-__memp_alloc(dbmp, len, offsetp, retp)
-	DB_MPOOL *dbmp;
-	size_t len, *offsetp;
-	void *retp;
-{
-	BH *bhp, *nbhp;
-	MPOOL *mp;
-	MPOOLFILE *mfp;
-	size_t fsize, total;
-	int nomore, restart, ret, wrote;
-	void *p;
-
-	mp = dbmp->mp;
-
-	nomore = 0;
-alloc:	if ((ret = __db_shalloc(dbmp->addr, len, MUTEX_ALIGNMENT, &p)) == 0) {
-		if (offsetp != NULL)
-			*offsetp = R_OFFSET(dbmp, p);
-		*(void **)retp = p;
-		return (0);
-	}
-	if (nomore) {
-		__db_err(dbmp->dbenv,
-	    "Unable to allocate %lu bytes from mpool shared region: %s\n",
-		    (u_long)len, strerror(ret));
-		return (ret);
-	}
-
-	/* Look for a buffer on the free list that's the right size. */
-	for (bhp =
-	    SH_TAILQ_FIRST(&mp->bhfq, __bh); bhp != NULL; bhp = nbhp) {
-		nbhp = SH_TAILQ_NEXT(bhp, q, __bh);
-
-		if (__db_shsizeof(bhp) == len) {
-			SH_TAILQ_REMOVE(&mp->bhfq, bhp, q, __bh);
-			if (offsetp != NULL)
-				*offsetp = R_OFFSET(dbmp, bhp);
-			*(void **)retp = bhp;
-			return (0);
-		}
-	}
-
-	/* Discard from the free list until we've freed enough memory. */
-	total = 0;
-	for (bhp =
-	    SH_TAILQ_FIRST(&mp->bhfq, __bh); bhp != NULL; bhp = nbhp) {
-		nbhp = SH_TAILQ_NEXT(bhp, q, __bh);
-
-		SH_TAILQ_REMOVE(&mp->bhfq, bhp, q, __bh);
-		__db_shalloc_free(dbmp->addr, bhp);
-		--mp->stat.st_page_clean;
-
-		/*
-		 * Retry as soon as we've freed up sufficient space.  If we
-		 * will have to coalesce memory to satisfy the request, don't
-		 * try until it's likely (possible?) that we'll succeed.
-		 */
-		total += fsize = __db_shsizeof(bhp);
-		if (fsize >= len || total >= 3 * len)
-			goto alloc;
-	}
-
-retry:	/* Find a buffer we can flush; pure LRU. */
-	restart = total = 0;
-	for (bhp =
-	    SH_TAILQ_FIRST(&mp->bhq, __bh); bhp != NULL; bhp = nbhp) {
-		nbhp = SH_TAILQ_NEXT(bhp, q, __bh);
-
-		/* Ignore pinned or locked (I/O in progress) buffers. */
-		if (bhp->ref != 0 || F_ISSET(bhp, BH_LOCKED))
-			continue;
-
-		/* Find the associated MPOOLFILE. */
-		mfp = R_ADDR(dbmp, bhp->mf_offset);
-
-		/*
-		 * Write the page if it's dirty.
-		 *
-		 * If we wrote the page, fall through and free the buffer.  We
-		 * don't have to rewalk the list to acquire the buffer because
-		 * it was never available for any other process to modify it.
-		 * If we didn't write the page, but we discarded and reacquired
-		 * the region lock, restart the buffer list walk.  If we neither
-		 * wrote the buffer nor discarded the region lock, continue down
-		 * the buffer list.
-		 */
-		if (F_ISSET(bhp, BH_DIRTY)) {
-			if ((ret = __memp_bhwrite(dbmp,
-			    mfp, bhp, &restart, &wrote)) != 0)
-				return (ret);
-
-			/*
-			 * It's possible that another process wants this buffer
-			 * and incremented the ref count while we were writing
-			 * it.
-			 */
-			if (bhp->ref != 0)
-				goto retry;
-
-			if (wrote)
-				++mp->stat.st_rw_evict;
-			else {
-				if (restart)
-					goto retry;
-				continue;
-			}
-		} else
-			++mp->stat.st_ro_evict;
-
-		/*
-		 * Check to see if the buffer is the size we're looking for.
-		 * If it is, simply reuse it.
-		 */
-		total += fsize = __db_shsizeof(bhp);
-		if (fsize == len) {
-			__memp_bhfree(dbmp, mfp, bhp, 0);
-
-			if (offsetp != NULL)
-				*offsetp = R_OFFSET(dbmp, bhp);
-			*(void **)retp = bhp;
-			return (0);
-		}
-
-		/* Free the buffer. */
-		__memp_bhfree(dbmp, mfp, bhp, 1);
-
-		/*
-		 * Retry as soon as we've freed up sufficient space.  If we
-		 * have to coalesce of memory to satisfy the request, don't
-		 * try until it's likely (possible?) that we'll succeed.
-		 */
-		if (fsize >= len || total >= 3 * len)
-			goto alloc;
-
-		/* Restart the walk if we discarded the region lock. */
-		if (restart)
-			goto retry;
-	}
-	nomore = 1;
-	goto alloc;
-}
-
-/*
- * __memp_ropen --
- *	Attach to, and optionally create, the mpool region.
- *
- * PUBLIC: int __memp_ropen
- * PUBLIC:    __P((DB_MPOOL *, const char *, size_t, int, int, u_int32_t));
- */
-int
-__memp_ropen(dbmp, path, cachesize, mode, is_private, flags)
-	DB_MPOOL *dbmp;
-	const char *path;
-	size_t cachesize;
-	int mode, is_private;
-	u_int32_t flags;
-{
-	MPOOL *mp;
-	size_t rlen;
-	int defcache, ret;
-
-	/*
-	 * Unlike other DB subsystems, mpool can't simply grow the region
-	 * because it returns pointers into the region to its clients.  To
-	 * "grow" the region, we'd have to allocate a new region and then
-	 * store a region number in the structures that reference regional
-	 * objects.  It's reasonable that we fail regardless, as clients
-	 * shouldn't have every page in the region pinned, so the only
-	 * "failure" mode should be a performance penalty because we don't
-	 * find a page in the cache that we'd like to have found.
-	 *
-	 * Up the user's cachesize by 25% to account for our overhead.
-	 */
-	defcache = 0;
-	if (cachesize < DB_CACHESIZE_MIN) {
-		if (cachesize == 0) {
-			defcache = 1;
-			cachesize = DB_CACHESIZE_DEF;
-		} else
-			cachesize = DB_CACHESIZE_MIN;
-	}
-	rlen = cachesize + cachesize / 4;
-
-	/*
-	 * Map in the region.
-	 *
-	 * If it's a private mpool, use malloc, it's a lot faster than
-	 * instantiating a region.
-	 */
-	dbmp->reginfo.dbenv = dbmp->dbenv;
-	dbmp->reginfo.appname = DB_APP_NONE;
-	if (path == NULL)
-		dbmp->reginfo.path = NULL;
-	else
-		if ((ret = __os_strdup(path, &dbmp->reginfo.path)) != 0)
-			return (ret);
-	dbmp->reginfo.file = DB_DEFAULT_MPOOL_FILE;
-	dbmp->reginfo.mode = mode;
-	dbmp->reginfo.size = rlen;
-	dbmp->reginfo.dbflags = flags;
-	dbmp->reginfo.flags = 0;
-	if (defcache)
-		F_SET(&dbmp->reginfo, REGION_SIZEDEF);
-
-	/*
-	 * If we're creating a temporary region, don't use any standard
-	 * naming.
-	 */
-	if (is_private) {
-		dbmp->reginfo.appname = DB_APP_TMP;
-		dbmp->reginfo.file = NULL;
-		F_SET(&dbmp->reginfo, REGION_PRIVATE);
-	}
-
-	if ((ret = __db_rattach(&dbmp->reginfo)) != 0) {
-		if (dbmp->reginfo.path != NULL)
-			__os_freestr(dbmp->reginfo.path);
-		return (ret);
-	}
-
-	/*
-	 * The MPOOL structure is first in the region, the rest of the region
-	 * is free space.
-	 */
-	dbmp->mp = dbmp->reginfo.addr;
-	dbmp->addr = (u_int8_t *)dbmp->mp + sizeof(MPOOL);
-
-	/* Initialize a created region. */
-	if (F_ISSET(&dbmp->reginfo, REGION_CREATED)) {
-		mp = dbmp->mp;
-		SH_TAILQ_INIT(&mp->bhq);
-		SH_TAILQ_INIT(&mp->bhfq);
-		SH_TAILQ_INIT(&mp->mpfq);
-
-		__db_shalloc_init(dbmp->addr, rlen - sizeof(MPOOL));
-
-		/*
-		 * Assume we want to keep the hash chains with under 10 pages
-		 * on each chain.  We don't know the pagesize in advance, and
-		 * it may differ for different files.  Use a pagesize of 1K for
-		 * the calculation -- we walk these chains a lot, they should
-		 * be short.
-		 */
-		mp->htab_buckets =
-		    __db_tablesize((cachesize / (1 * 1024)) / 10);
-
-		/* Allocate hash table space and initialize it. */
-		if ((ret = __db_shalloc(dbmp->addr,
-		    mp->htab_buckets * sizeof(DB_HASHTAB),
-		    0, &dbmp->htab)) != 0)
-			goto err;
-		__db_hashinit(dbmp->htab, mp->htab_buckets);
-		mp->htab = R_OFFSET(dbmp, dbmp->htab);
-
-		ZERO_LSN(mp->lsn);
-		mp->lsn_cnt = 0;
-
-		memset(&mp->stat, 0, sizeof(mp->stat));
-		mp->stat.st_cachesize = cachesize;
-
-		mp->flags = 0;
-	}
-
-	/* Get the local hash table address. */
-	dbmp->htab = R_ADDR(dbmp, dbmp->mp->htab);
-
-	UNLOCKREGION(dbmp);
-	return (0);
-
-err:	UNLOCKREGION(dbmp);
-	(void)__db_rdetach(&dbmp->reginfo);
-	if (F_ISSET(&dbmp->reginfo, REGION_CREATED))
-		(void)memp_unlink(path, 1, dbmp->dbenv);
-
-	if (dbmp->reginfo.path != NULL)
-		__os_freestr(dbmp->reginfo.path);
-	return (ret);
-}