mp_fopen.c
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上传日期:2007-04-14
资源大小:10674k
文件大小:20k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996, 1997, 1998, 1999, 2000
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: mp_fopen.c,v 11.41 2001/01/10 04:50:53 ubell Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <string.h>
- #endif
- #ifdef HAVE_RPC
- #include "db_server.h"
- #endif
- #include "db_int.h"
- #include "db_shash.h"
- #include "mp.h"
- #ifdef HAVE_RPC
- #include "gen_client_ext.h"
- #include "rpc_client_ext.h"
- #endif
- static int __memp_mf_open __P((DB_MPOOL *, const char *,
- size_t, db_pgno_t, DB_MPOOL_FINFO *, u_int32_t, MPOOLFILE **));
- /*
- * MEMP_FREMOVE --
- * Discard an MPOOLFILE and any buffers it references: update the flags
- * so we never try to write buffers associated with the file, nor can we
- * find it when looking for files to join. In addition, clear the ftype
- * field, there's no reason to post-process pages, they can be discarded
- * by any thread.
- */
- #define MEMP_FREMOVE(mfp) {
- mfp->ftype = 0;
- F_SET(mfp, MP_DEADFILE);
- }
- /*
- * memp_fopen --
- * Open a backing file for the memory pool.
- */
- int
- memp_fopen(dbenv, path, flags, mode, pagesize, finfop, retp)
- DB_ENV *dbenv;
- const char *path;
- u_int32_t flags;
- int mode;
- size_t pagesize;
- DB_MPOOL_FINFO *finfop;
- DB_MPOOLFILE **retp;
- {
- DB_MPOOL *dbmp;
- int ret;
- #ifdef HAVE_RPC
- if (F_ISSET(dbenv, DB_ENV_RPCCLIENT))
- return (__dbcl_memp_fopen(dbenv, path, flags,
- mode, pagesize, finfop, retp));
- #endif
- PANIC_CHECK(dbenv);
- ENV_REQUIRES_CONFIG(dbenv, dbenv->mp_handle, DB_INIT_MPOOL);
- dbmp = dbenv->mp_handle;
- /* Validate arguments. */
- if ((ret = __db_fchk(dbenv, "memp_fopen", flags,
- DB_CREATE |
- DB_NOMMAP | DB_ODDFILESIZE | DB_RDONLY | DB_TRUNCATE)) != 0)
- return (ret);
- /* Require a non-zero pagesize. */
- if (pagesize == 0 ||
- (finfop != NULL && finfop->clear_len > pagesize)) {
- __db_err(dbenv, "memp_fopen: illegal page size.");
- return (EINVAL);
- }
- return (__memp_fopen(dbmp,
- NULL, path, flags, mode, pagesize, 1, finfop, retp));
- }
- /*
- * __memp_set_unlink -- set unlink on last close flag.
- *
- * PUBLIC: void __memp_set_unlink __P((DB_MPOOLFILE *));
- */
- void
- __memp_set_unlink(dbmpf)
- DB_MPOOLFILE *dbmpf;
- {
- DB_MPOOL *dbmp;
- dbmp = dbmpf->dbmp;
- R_LOCK(dbmp->dbenv, dbmp->reginfo);
- F_SET(dbmpf->mfp, MP_UNLINK);
- R_UNLOCK(dbmp->dbenv, dbmp->reginfo);
- }
- /*
- * __memp_clear_unlink -- clear unlink on last close flag.
- *
- * PUBLIC: void __memp_clear_unlink __P((DB_MPOOLFILE *));
- */
- void
- __memp_clear_unlink(dbmpf)
- DB_MPOOLFILE *dbmpf;
- {
- DB_MPOOL *dbmp;
- dbmp = dbmpf->dbmp;
- /*
- * This bit is protected in the queue code because the metapage
- * is locked so we can avoid geting the region lock.
- * If this gets used from other than the queue code, we cannot.
- */
- if (!F_ISSET(dbmpf->mfp, MP_UNLINK))
- return;
- R_LOCK(dbmp->dbenv, dbmp->reginfo);
- F_CLR(dbmpf->mfp, MP_UNLINK);
- R_UNLOCK(dbmp->dbenv, dbmp->reginfo);
- }
- /*
- * __memp_fopen --
- * Open a backing file for the memory pool; internal version.
- *
- * PUBLIC: int __memp_fopen __P((DB_MPOOL *, MPOOLFILE *, const char *,
- * PUBLIC: u_int32_t, int, size_t, int, DB_MPOOL_FINFO *, DB_MPOOLFILE **));
- */
- int
- __memp_fopen(dbmp, mfp, path, flags, mode, pagesize, needlock, finfop, retp)
- DB_MPOOL *dbmp;
- MPOOLFILE *mfp;
- const char *path;
- u_int32_t flags;
- int mode, needlock;
- size_t pagesize;
- DB_MPOOL_FINFO *finfop;
- DB_MPOOLFILE **retp;
- {
- DB_ENV *dbenv;
- DB_MPOOLFILE *dbmfp;
- DB_MPOOL_FINFO finfo;
- db_pgno_t last_pgno;
- size_t maxmap;
- u_int32_t mbytes, bytes, oflags;
- int ret;
- u_int8_t idbuf[DB_FILE_ID_LEN];
- char *rpath;
- dbenv = dbmp->dbenv;
- ret = 0;
- rpath = NULL;
- /*
- * If mfp is provided, we take the DB_MPOOL_FINFO information from
- * the mfp. We don't bother initializing everything, because some
- * of them are expensive to acquire. If no mfp is provided and the
- * finfop argument is NULL, we default the values.
- */
- if (finfop == NULL) {
- memset(&finfo, 0, sizeof(finfo));
- if (mfp != NULL) {
- finfo.ftype = mfp->ftype;
- finfo.pgcookie = NULL;
- finfo.fileid = NULL;
- finfo.lsn_offset = mfp->lsn_off;
- finfo.clear_len = mfp->clear_len;
- } else {
- finfo.ftype = 0;
- finfo.pgcookie = NULL;
- finfo.fileid = NULL;
- finfo.lsn_offset = -1;
- finfo.clear_len = 0;
- }
- finfop = &finfo;
- }
- /* Allocate and initialize the per-process structure. */
- if ((ret = __os_calloc(dbenv, 1, sizeof(DB_MPOOLFILE), &dbmfp)) != 0)
- return (ret);
- dbmfp->dbmp = dbmp;
- dbmfp->ref = 1;
- if (LF_ISSET(DB_RDONLY))
- F_SET(dbmfp, MP_READONLY);
- if (path == NULL) {
- if (LF_ISSET(DB_RDONLY)) {
- __db_err(dbenv,
- "memp_fopen: temporary files can't be readonly");
- ret = EINVAL;
- goto err;
- }
- last_pgno = 0;
- } else {
- /* Get the real name for this file and open it. */
- if ((ret = __db_appname(dbenv,
- DB_APP_DATA, NULL, path, 0, NULL, &rpath)) != 0)
- goto err;
- oflags = 0;
- if (LF_ISSET(DB_CREATE))
- oflags |= DB_OSO_CREATE;
- if (LF_ISSET(DB_RDONLY))
- oflags |= DB_OSO_RDONLY;
- if ((ret =
- __os_open(dbenv, rpath, oflags, mode, &dbmfp->fh)) != 0) {
- if (!LF_ISSET(DB_EXTENT))
- __db_err(dbenv,
- "%s: %s", rpath, db_strerror(ret));
- goto err;
- }
- /*
- * Don't permit files that aren't a multiple of the pagesize,
- * and find the number of the last page in the file, all the
- * time being careful not to overflow 32 bits.
- *
- * !!!
- * We can't use off_t's here, or in any code in the mainline
- * library for that matter. (We have to use them in the os
- * stubs, of course, as there are system calls that take them
- * as arguments.) The reason is that some customers build in
- * environments where an off_t is 32-bits, but still run where
- * offsets are 64-bits, and they pay us a lot of money.
- */
- if ((ret = __os_ioinfo(dbenv, rpath,
- &dbmfp->fh, &mbytes, &bytes, NULL)) != 0) {
- __db_err(dbenv, "%s: %s", rpath, db_strerror(ret));
- goto err;
- }
- /*
- * If we're doing a verify, we might have to cope with
- * a truncated file; if the file size is not a multiple
- * of the page size, round down to a page--we'll
- * take care of the partial page outside the memp system.
- */
- /* Page sizes have to be a power-of-two, ignore mbytes. */
- if (bytes % pagesize != 0) {
- if (LF_ISSET(DB_ODDFILESIZE))
- /*
- * If we're doing a verify, we might
- * have to cope with a truncated file;
- * round down, we'll worry about the partial
- * page outside the memp system.
- */
- bytes -= (bytes % pagesize);
- else {
- __db_err(dbenv,
- "%s: file size not a multiple of the pagesize",
- rpath);
- ret = EINVAL;
- goto err;
- }
- }
- last_pgno = mbytes * (MEGABYTE / pagesize);
- last_pgno += bytes / pagesize;
- /* Correction: page numbers are zero-based, not 1-based. */
- if (last_pgno != 0)
- --last_pgno;
- /*
- * Get the file id if we weren't given one. Generated file id's
- * don't use timestamps, otherwise there'd be no chance of any
- * other process joining the party.
- */
- if (finfop->fileid == NULL) {
- if ((ret = __os_fileid(dbenv, rpath, 0, idbuf)) != 0)
- goto err;
- finfop->fileid = idbuf;
- }
- }
- /*
- * If we weren't provided an underlying shared object to join with,
- * find/allocate the shared file objects. Also allocate space for
- * for the per-process thread lock.
- */
- if (needlock)
- R_LOCK(dbenv, dbmp->reginfo);
- if (mfp == NULL)
- ret = __memp_mf_open(
- dbmp, path, pagesize, last_pgno, finfop, flags, &mfp);
- else {
- ++mfp->mpf_cnt;
- ret = 0;
- }
- if (needlock)
- R_UNLOCK(dbenv, dbmp->reginfo);
- if (ret != 0)
- goto err;
- if (F_ISSET(dbenv, DB_ENV_THREAD)) {
- if ((ret = __db_mutex_alloc(
- dbenv, dbmp->reginfo, &dbmfp->mutexp)) != 0)
- goto err;
- if ((ret = __db_mutex_init(
- dbenv, dbmfp->mutexp, 0, MUTEX_THREAD)) != 0)
- goto err;
- /* XXX: KEITH: CLOSE THE FILE ON FAILURE? */
- }
- dbmfp->mfp = mfp;
- /*
- * If a file:
- * + is read-only
- * + isn't temporary
- * + doesn't require any pgin/pgout support
- * + the DB_NOMMAP flag wasn't set (in either the file open or
- * the environment in which it was opened)
- * + and is less than mp_mmapsize bytes in size
- *
- * we can mmap it instead of reading/writing buffers. Don't do error
- * checking based on the mmap call failure. We want to do normal I/O
- * on the file if the reason we failed was because the file was on an
- * NFS mounted partition, and we can fail in buffer I/O just as easily
- * as here.
- *
- * XXX
- * We'd like to test to see if the file is too big to mmap. Since we
- * don't know what size or type off_t's or size_t's are, or the largest
- * unsigned integral type is, or what random insanity the local C
- * compiler will perpetrate, doing the comparison in a portable way is
- * flatly impossible. Hope that mmap fails if the file is too large.
- */
- #define DB_MAXMMAPSIZE (10 * 1024 * 1024) /* 10 Mb. */
- if (F_ISSET(mfp, MP_CAN_MMAP)) {
- if (!F_ISSET(dbmfp, MP_READONLY))
- F_CLR(mfp, MP_CAN_MMAP);
- if (path == NULL)
- F_CLR(mfp, MP_CAN_MMAP);
- if (finfop->ftype != 0)
- F_CLR(mfp, MP_CAN_MMAP);
- if (LF_ISSET(DB_NOMMAP) || F_ISSET(dbenv, DB_ENV_NOMMAP))
- F_CLR(mfp, MP_CAN_MMAP);
- maxmap = dbenv->mp_mmapsize == 0 ?
- DB_MAXMMAPSIZE : dbenv->mp_mmapsize;
- if (mbytes > maxmap / MEGABYTE ||
- (mbytes == maxmap / MEGABYTE && bytes >= maxmap % MEGABYTE))
- F_CLR(mfp, MP_CAN_MMAP);
- }
- dbmfp->addr = NULL;
- if (F_ISSET(mfp, MP_CAN_MMAP)) {
- dbmfp->len = (size_t)mbytes * MEGABYTE + bytes;
- if (__os_mapfile(dbenv, rpath,
- &dbmfp->fh, dbmfp->len, 1, &dbmfp->addr) != 0) {
- dbmfp->addr = NULL;
- F_CLR(mfp, MP_CAN_MMAP);
- }
- }
- if (rpath != NULL)
- __os_freestr(rpath);
- MUTEX_THREAD_LOCK(dbenv, dbmp->mutexp);
- TAILQ_INSERT_TAIL(&dbmp->dbmfq, dbmfp, q);
- MUTEX_THREAD_UNLOCK(dbenv, dbmp->mutexp);
- *retp = dbmfp;
- return (0);
- err: /*
- * Note that we do not have to free the thread mutex, because we
- * never get to here after we have successfully allocated it.
- */
- if (rpath != NULL)
- __os_freestr(rpath);
- if (F_ISSET(&dbmfp->fh, DB_FH_VALID))
- (void)__os_closehandle(&dbmfp->fh);
- if (dbmfp != NULL) {
- if (dbmfp->mutexp != NULL)
- __db_mutex_free(dbenv, dbmp->reginfo, dbmfp->mutexp);
- __os_free(dbmfp, sizeof(DB_MPOOLFILE));
- }
- return (ret);
- }
- /*
- * __memp_mf_open --
- * Open an MPOOLFILE.
- */
- static int
- __memp_mf_open(dbmp, path, pagesize, last_pgno, finfop, flags, retp)
- DB_MPOOL *dbmp;
- const char *path;
- size_t pagesize;
- db_pgno_t last_pgno;
- DB_MPOOL_FINFO *finfop;
- u_int32_t flags;
- MPOOLFILE **retp;
- {
- MPOOL *mp;
- MPOOLFILE *mfp;
- int ret;
- void *p;
- #define ISTEMPORARY (path == NULL)
- /*
- * If not creating a temporary file, walk the list of MPOOLFILE's,
- * looking for a matching file. Files backed by temporary files
- * or previously removed files can't match.
- *
- * DB_TRUNCATE support.
- *
- * The fileID is a filesystem unique number (e.g., a UNIX dev/inode
- * pair) plus a timestamp. If files are removed and created in less
- * than a second, the fileID can be repeated. The problem with
- * repetition happens when the file that previously had the fileID
- * value still has pages in the pool, since we don't want to use them
- * to satisfy requests for the new file.
- *
- * Because the DB_TRUNCATE flag reuses the dev/inode pair, repeated
- * opens with that flag set guarantees matching fileIDs when the
- * machine can open a file and then re-open with truncate within a
- * second. For this reason, we pass that flag down, and, if we find
- * a matching entry, we ensure that it's never found again, and we
- * create a new entry for the current request.
- */
- if (!ISTEMPORARY) {
- mp = dbmp->reginfo[0].primary;
- for (mfp = SH_TAILQ_FIRST(&mp->mpfq, __mpoolfile);
- mfp != NULL; mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile)) {
- if (F_ISSET(mfp, MP_DEADFILE | MP_TEMP))
- continue;
- if (memcmp(finfop->fileid, R_ADDR(dbmp->reginfo,
- mfp->fileid_off), DB_FILE_ID_LEN) == 0) {
- if (LF_ISSET(DB_TRUNCATE)) {
- MEMP_FREMOVE(mfp);
- continue;
- }
- if (finfop->clear_len != mfp->clear_len ||
- pagesize != mfp->stat.st_pagesize) {
- __db_err(dbmp->dbenv,
- "%s: page size or clear length changed",
- path);
- return (EINVAL);
- }
- /*
- * It's possible that our needs for pre- and
- * post-processing are changing. For example,
- * an application created a hash subdatabase
- * in a database that was previously all btree.
- */
- if (finfop->ftype != 0)
- mfp->ftype = finfop->ftype;
- ++mfp->mpf_cnt;
- *retp = mfp;
- return (0);
- }
- }
- }
- /* Allocate a new MPOOLFILE. */
- if ((ret = __memp_alloc(
- dbmp, dbmp->reginfo, NULL, sizeof(MPOOLFILE), NULL, &mfp)) != 0)
- goto mem_err;
- *retp = mfp;
- /* Initialize the structure. */
- memset(mfp, 0, sizeof(MPOOLFILE));
- mfp->mpf_cnt = 1;
- mfp->ftype = finfop->ftype;
- mfp->lsn_off = finfop->lsn_offset;
- mfp->clear_len = finfop->clear_len;
- /*
- * If the user specifies DB_MPOOL_LAST or DB_MPOOL_NEW on a memp_fget,
- * we have to know the last page in the file. Figure it out and save
- * it away.
- */
- mfp->stat.st_pagesize = pagesize;
- mfp->orig_last_pgno = mfp->last_pgno = last_pgno;
- if (ISTEMPORARY)
- F_SET(mfp, MP_TEMP);
- else {
- /* Copy the file path into shared memory. */
- if ((ret = __memp_alloc(dbmp, dbmp->reginfo,
- NULL, strlen(path) + 1, &mfp->path_off, &p)) != 0)
- goto err;
- memcpy(p, path, strlen(path) + 1);
- /* Copy the file identification string into shared memory. */
- if ((ret = __memp_alloc(dbmp, dbmp->reginfo,
- NULL, DB_FILE_ID_LEN, &mfp->fileid_off, &p)) != 0)
- goto err;
- memcpy(p, finfop->fileid, DB_FILE_ID_LEN);
- F_SET(mfp, MP_CAN_MMAP);
- }
- /* Copy the page cookie into shared memory. */
- if (finfop->pgcookie == NULL || finfop->pgcookie->size == 0) {
- mfp->pgcookie_len = 0;
- mfp->pgcookie_off = 0;
- } else {
- if ((ret = __memp_alloc(dbmp, dbmp->reginfo,
- NULL, finfop->pgcookie->size, &mfp->pgcookie_off, &p)) != 0)
- goto err;
- memcpy(p, finfop->pgcookie->data, finfop->pgcookie->size);
- mfp->pgcookie_len = finfop->pgcookie->size;
- }
- /* Prepend the MPOOLFILE to the list of MPOOLFILE's. */
- mp = dbmp->reginfo[0].primary;
- SH_TAILQ_INSERT_HEAD(&mp->mpfq, mfp, q, __mpoolfile);
- if (0) {
- err: if (mfp->path_off != 0)
- __db_shalloc_free(dbmp->reginfo[0].addr,
- R_ADDR(dbmp->reginfo, mfp->path_off));
- if (mfp->fileid_off != 0)
- __db_shalloc_free(dbmp->reginfo[0].addr,
- R_ADDR(dbmp->reginfo, mfp->fileid_off));
- if (mfp != NULL)
- __db_shalloc_free(dbmp->reginfo[0].addr, mfp);
- mem_err: __db_err(dbmp->dbenv,
- "Unable to allocate memory for mpool file");
- }
- return (ret);
- }
- /*
- * memp_fclose --
- * Close a backing file for the memory pool.
- */
- int
- memp_fclose(dbmfp)
- DB_MPOOLFILE *dbmfp;
- {
- DB_ENV *dbenv;
- DB_MPOOL *dbmp;
- MPOOLFILE *mfp;
- char *rpath;
- int ret, t_ret;
- dbmp = dbmfp->dbmp;
- dbenv = dbmp->dbenv;
- ret = 0;
- PANIC_CHECK(dbenv);
- #ifdef HAVE_RPC
- if (F_ISSET(dbenv, DB_ENV_RPCCLIENT))
- return (__dbcl_memp_fclose(dbmfp));
- #endif
- /*
- * Remove the DB_MPOOLFILE from the queue. This has to happen before
- * we perform any action that can fail, otherwise __memp_close may
- * loop infinitely when calling us to discard all of the DB_MPOOLFILEs.
- */
- for (;;) {
- MUTEX_THREAD_LOCK(dbenv, dbmp->mutexp);
- /*
- * We have to reference count DB_MPOOLFILE structures as other
- * threads may be using them. The problem only happens if the
- * application makes a bad design choice. Here's the path:
- *
- * Thread A opens a database.
- * Thread B uses thread A's DB_MPOOLFILE to write a buffer
- * in order to free up memory in the mpool cache.
- * Thread A closes the database while thread B is using the
- * DB_MPOOLFILE structure.
- *
- * By opening all databases before creating the threads, and
- * closing them after the threads have exited, applications
- * get better performance and avoid the problem path entirely.
- *
- * Regardless, holding the DB_MPOOLFILE to flush a dirty buffer
- * is a short-term lock, even in worst case, since we better be
- * the only thread of control using the DB_MPOOLFILE structure
- * to read pages *into* the cache. Wait until we're the only
- * reference holder and remove the DB_MPOOLFILE structure from
- * the list, so nobody else can even find it.
- */
- if (dbmfp->ref == 1) {
- TAILQ_REMOVE(&dbmp->dbmfq, dbmfp, q);
- break;
- }
- MUTEX_THREAD_UNLOCK(dbenv, dbmp->mutexp);
- (void)__os_sleep(dbenv, 1, 0);
- }
- MUTEX_THREAD_UNLOCK(dbenv, dbmp->mutexp);
- /* Complain if pinned blocks never returned. */
- if (dbmfp->pinref != 0)
- __db_err(dbenv, "%s: close: %lu blocks left pinned",
- __memp_fn(dbmfp), (u_long)dbmfp->pinref);
- /* Discard any mmap information. */
- if (dbmfp->addr != NULL &&
- (ret = __os_unmapfile(dbenv, dbmfp->addr, dbmfp->len)) != 0)
- __db_err(dbenv, "%s: %s", __memp_fn(dbmfp), db_strerror(ret));
- /* Close the file; temporary files may not yet have been created. */
- if (F_ISSET(&dbmfp->fh, DB_FH_VALID) &&
- (t_ret = __os_closehandle(&dbmfp->fh)) != 0) {
- __db_err(dbenv, "%s: %s", __memp_fn(dbmfp), db_strerror(t_ret));
- if (ret != 0)
- t_ret = ret;
- }
- /* Discard the thread mutex. */
- if (dbmfp->mutexp != NULL)
- __db_mutex_free(dbenv, dbmp->reginfo, dbmfp->mutexp);
- /*
- * Discard our reference on the the underlying MPOOLFILE, and close
- * it if it's no longer useful to anyone.
- *
- * If we're not discarding it, and it's a temp file, this means
- * all the outstanding references belong to unflushed buffers.
- * (A temp file can only be referenced by one DB_MPOOLFILE).
- * We don't care about preserving any of those buffers, so mark
- * the MPOOLFILE as dead so that when we try to flush them,
- * even the dirty ones just get discarded.
- */
- R_LOCK(dbenv, dbmp->reginfo);
- mfp = dbmfp->mfp;
- if (--mfp->mpf_cnt == 0) {
- if (F_ISSET(mfp, MP_UNLINK)) {
- MEMP_FREMOVE(mfp);
- if ((t_ret = __db_appname(dbmp->dbenv,
- DB_APP_DATA, NULL, R_ADDR(dbmp->reginfo,
- mfp->path_off), 0, NULL, &rpath)) != 0 && ret == 0)
- ret = t_ret;
- if (t_ret == 0 && (t_ret =
- __os_unlink(dbmp->dbenv, rpath) != 0 && ret == 0))
- ret = t_ret;
- __os_free(rpath, 0);
- }
- if (mfp->block_cnt == 0)
- __memp_mf_discard(dbmp, mfp);
- }
- else if (F_ISSET(mfp, MP_TEMP))
- MEMP_FREMOVE(mfp);
- R_UNLOCK(dbenv, dbmp->reginfo);
- /* Discard the DB_MPOOLFILE structure. */
- __os_free(dbmfp, sizeof(DB_MPOOLFILE));
- return (ret);
- }
- /*
- * __memp_mf_discard --
- * Discard an MPOOLFILE.
- *
- * PUBLIC: void __memp_mf_discard __P((DB_MPOOL *, MPOOLFILE *));
- */
- void
- __memp_mf_discard(dbmp, mfp)
- DB_MPOOL *dbmp;
- MPOOLFILE *mfp;
- {
- MPOOL *mp;
- mp = dbmp->reginfo[0].primary;
- /* Delete from the list of MPOOLFILEs. */
- SH_TAILQ_REMOVE(&mp->mpfq, mfp, q, __mpoolfile);
- /* Free the space. */
- if (mfp->path_off != 0)
- __db_shalloc_free(dbmp->reginfo[0].addr,
- R_ADDR(dbmp->reginfo, mfp->path_off));
- if (mfp->fileid_off != 0)
- __db_shalloc_free(dbmp->reginfo[0].addr,
- R_ADDR(dbmp->reginfo, mfp->fileid_off));
- if (mfp->pgcookie_off != 0)
- __db_shalloc_free(dbmp->reginfo[0].addr,
- R_ADDR(dbmp->reginfo, mfp->pgcookie_off));
- __db_shalloc_free(dbmp->reginfo[0].addr, mfp);
- }
- /*
- * __memp_fremove --
- * Remove an underlying file from the system.
- *
- * PUBLIC: int __memp_fremove __P((DB_MPOOLFILE *));
- */
- int
- __memp_fremove(dbmfp)
- DB_MPOOLFILE *dbmfp;
- {
- DB_ENV *dbenv;
- DB_MPOOL *dbmp;
- MPOOLFILE *mfp;
- dbmp = dbmfp->dbmp;
- dbenv = dbmp->dbenv;
- mfp = dbmfp->mfp;
- PANIC_CHECK(dbenv);
- R_LOCK(dbenv, dbmp->reginfo);
- MEMP_FREMOVE(mfp);
- R_UNLOCK(dbenv, dbmp->reginfo);
- return (0);
- }
- /*
- * __memp_fn --
- * On errors we print whatever is available as the file name.
- *
- * PUBLIC: char * __memp_fn __P((DB_MPOOLFILE *));
- */
- char *
- __memp_fn(dbmfp)
- DB_MPOOLFILE *dbmfp;
- {
- return (__memp_fns(dbmfp->dbmp, dbmfp->mfp));
- }
- /*
- * __memp_fns --
- * On errors we print whatever is available as the file name.
- *
- * PUBLIC: char * __memp_fns __P((DB_MPOOL *, MPOOLFILE *));
- *
- */
- char *
- __memp_fns(dbmp, mfp)
- DB_MPOOL *dbmp;
- MPOOLFILE *mfp;
- {
- if (mfp->path_off == 0)
- return ((char *)"temporary");
- return ((char *)R_ADDR(dbmp->reginfo, mfp->path_off));
- }