diff options
| author | Ulrich Drepper <drepper@redhat.com> | 1997-08-27 20:26:10 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1997-08-27 20:26:10 +0000 |
| commit | 92f1da4da04a7a86ddee91be5eaf0b10c333ac64 (patch) | |
| tree | 2a10ce9e4e407e7e5b5ca092ca0947d234b5ff60 /db2/hash | |
| parent | 22be878ecbc66606371bd33258f56e6711e6ba7a (diff) | |
| download | glibc-cvs/libc-ud-970827.tar.xz glibc-cvs/libc-ud-970827.zip | |
Update.cvs/libc-ud-970827
1997-08-10 19:17 Philip Blundell <Philip.Blundell@pobox.com>
* nss/nss_db/db-XXX.c: Include <db_185.h> not <db.h>. Somebody
should update this to use the new db API.
* nss/nss_db/db-netgrp.c: Likewise.
* nss/nss_db/db-alias.c: Likewise.
* db2/Makefile: Makefile for db-2.x in glibc.
1997-08-27 21:20 Ulrich Drepper <drepper@cygnus.com>
* csu/Makefile (before-compile): New goal. Make sure abi-tag.h
is generated.
[$(elf)=yes] (asm-CPPFLAGS): Make sure abi-tag.h file can be found.
* Makeconfig [$(build-omitfp)=yes] (CFLAGS-.o): Add
-D__USE_STRING_INLINES.
* string/string.f: Move strnlen optimization after inclusion of
<bits/string.h>. Include <bits/string.h> only if __USE_STRING_INLINES
is defined.
* sysdeps/generic/memcpy.c: Undef memcpy to allow macro of this name
in <bits/string.h>.
* sysdeps/generic/memset.c: Likewise.
* sysdeps/i386/string.h: i386 optimized string functions.
* sysdeps/i386/i486string.h: i486+ optimized string functions.
* Makefile (subdirs): Change db to db2.
* shlib-versions: Bump libdb verion number to 3.
* include/db.h: Include from db2 directory.
* include/db_185.h: New file.
* sysdeps/i386/Makefile [$(subdirs)=db2] (CPPFLAGS): Add macros
to provide spinlock information for db2.
* sysdeps/m68k/m68020/Makefile: New file. Likewise.
* sysdeps/sparc/Makefile: New file. Likewise.
* sysdeps/unix/sysv/linux/Makefile [$(subdirs)=db2] (CPPFLAGS):
Add -DHAVE_LLSEEK.
* db2/config.h: Hand-edited config file for db2 in glibc.
* db2/compat.h: New file from db-2.3.4.
* db2/db.h: Likewise.
* db2/db_185.h: Likewise.
* db2/db_int.h: Likewise.
* db2/makedb.c: Likewise.
* db2/btree/bt_close.c: Likewise.
* db2/btree/bt_compare.c: Likewise.
* db2/btree/bt_conv.c: Likewise.
* db2/btree/bt_cursor.c: Likewise.
* db2/btree/bt_delete.c: Likewise.
* db2/btree/bt_open.c: Likewise.
* db2/btree/bt_page.c: Likewise.
* db2/btree/bt_put.c: Likewise.
* db2/btree/bt_rec.c: Likewise.
* db2/btree/bt_recno.c: Likewise.
* db2/btree/btree_auto.c: Likewise.
* db2/btree/bt_rsearch.c: Likewise.
* db2/btree/bt_search.c: Likewise.
* db2/btree/bt_split.c: Likewise.
* db2/btree/bt_stat.c: Likewise.
* db2/btree/btree.src: Likewise.
* db2/common/db_appinit.c: Likewise.
* db2/common/db_err.c: Likewise.
* db2/common/db_byteorder.c: Likewise.
* db2/common/db_apprec.c: Likewise.
* db2/common/db_salloc.c: Likewise.
* db2/common/db_log2.c: Likewise.
* db2/common/db_region.c: Likewise.
* db2/common/db_shash.c: Likewise.
* db2/db/db.c: Likewise.
* db2/db/db.src: Likewise.
* db2/db/db_conv.c: Likewise.
* db2/db/db_dispatch.c: Likewise.
* db2/db/db_dup.c: Likewise.
* db2/db/db_overflow.c: Likewise.
* db2/db/db_pr.c: Likewise.
* db2/db/db_rec.c: Likewise.
* db2/db/db_ret.c: Likewise.
* db2/db/db_thread.c: Likewise.
* db2/db/db_auto.c: Likewise.
* db2/db185/db185.c: Likewise.
* db2/db185/db185_int.h: Likewise.
* db2/dbm/dbm.c: Likewise.
* db2/hash/hash.c: Likewise.
* db2/hash/hash.src: Likewise.
* db2/hash/hash_page.c: Likewise.
* db2/hash/hash_conv.c: Likewise.
* db2/hash/hash_debug.c: Likewise.
* db2/hash/hash_stat.c: Likewise.
* db2/hash/hash_rec.c: Likewise.
* db2/hash/hash_dup.c: Likewise.
* db2/hash/hash_func.c: Likewise.
* db2/hash/hash_auto.c: Likewise.
* db2/include/mp.h: Likewise.
* db2/include/btree.h: Likewise.
* db2/include/db.h.src: Likewise.
* db2/include/db_int.h.src: Likewise.
* db2/include/db_shash.h: Likewise.
* db2/include/db_swap.h: Likewise.
* db2/include/db_185.h.src: Likewise.
* db2/include/txn.h: Likewise.
* db2/include/db_am.h: Likewise.
* db2/include/shqueue.h: Likewise.
* db2/include/hash.h: Likewise.
* db2/include/db_dispatch.h: Likewise.
* db2/include/lock.h: Likewise.
* db2/include/db_page.h: Likewise.
* db2/include/log.h: Likewise.
* db2/include/db_auto.h: Likewise.
* db2/include/btree_auto.h: Likewise.
* db2/include/hash_auto.h: Likewise.
* db2/include/log_auto.h: Likewise.
* db2/include/txn_auto.h: Likewise.
* db2/include/db_ext.h: Likewise.
* db2/include/btree_ext.h: Likewise.
* db2/include/clib_ext.h: Likewise.
* db2/include/common_ext.h: Likewise.
* db2/include/hash_ext.h: Likewise.
* db2/include/lock_ext.h: Likewise.
* db2/include/log_ext.h: Likewise.
* db2/include/mp_ext.h: Likewise.
* db2/include/mutex_ext.h: Likewise.
* db2/include/os_ext.h: Likewise.
* db2/include/txn_ext.h: Likewise.
* db2/include/cxx_int.h: Likewise.
* db2/include/db_cxx.h: Likewise.
* db2/include/queue.h: Likewise.
* db2/lock/lock.c: Likewise.
* db2/lock/lock_conflict.c: Likewise.
* db2/lock/lock_util.c: Likewise.
* db2/lock/lock_deadlock.c: Likewise.
* db2/log/log.c: Likewise.
* db2/log/log_get.c: Likewise.
* db2/log/log.src: Likewise.
* db2/log/log_compare.c: Likewise.
* db2/log/log_put.c: Likewise.
* db2/log/log_rec.c: Likewise.
* db2/log/log_archive.c: Likewise.
* db2/log/log_register.c: Likewise.
* db2/log/log_auto.c: Likewise.
* db2/log/log_findckp.c: Likewise.
* db2/mp/mp_bh.c: Likewise.
* db2/mp/mp_fget.c: Likewise.
* db2/mp/mp_fopen.c: Likewise.
* db2/mp/mp_fput.c: Likewise.
* db2/mp/mp_fset.c: Likewise.
* db2/mp/mp_open.c: Likewise.
* db2/mp/mp_region.c: Likewise.
* db2/mp/mp_pr.c: Likewise.
* db2/mp/mp_sync.c: Likewise.
* db2/mutex/68020.gcc: Likewise.
* db2/mutex/mutex.c: Likewise.
* db2/mutex/README: Likewise.
* db2/mutex/x86.gcc: Likewise.
* db2/mutex/sparc.gcc: Likewise.
* db2/mutex/uts4.cc.s: Likewise.
* db2/mutex/alpha.dec: Likewise.
* db2/mutex/alpha.gcc: Likewise.
* db2/mutex/parisc.gcc: Likewise.
* db2/mutex/parisc.hp: Likewise.
* db2/os/db_os_abs.c: Likewise.
* db2/os/db_os_dir.c: Likewise.
* db2/os/db_os_fid.c: Likewise.
* db2/os/db_os_lseek.c: Likewise.
* db2/os/db_os_mmap.c: Likewise.
* db2/os/db_os_open.c: Likewise.
* db2/os/db_os_rw.c: Likewise.
* db2/os/db_os_sleep.c: Likewise.
* db2/os/db_os_stat.c: Likewise.
* db2/os/db_os_unlink.c: Likewise.
* db2/txn/txn.c: Likewise.
* db2/txn/txn.src: Likewise.
* db2/txn/txn_rec.c: Likewise.
* db2/txn/txn_auto.c: Likewise.
* db2/clib/getlong.c: Likewise.
* db2/progs/db_archive/db_archive.c: Likewise.
* db2/progs/db_checkpoint/db_checkpoint.c: Likewise.
* db2/progs/db_deadlock/db_deadlock.c: Likewise.
* db2/progs/db_dump/db_dump.c: Likewise.
* db2/progs/db_dump185/db_dump185.c: Likewise.
* db2/progs/db_load/db_load.c: Likewise.
* db2/progs/db_printlog/db_printlog.c: Likewise.
* db2/progs/db_recover/db_recover.c: Likewise.
* db2/progs/db_stat/db_stat.c: Likewise.
* libio/stdio.h [__cplusplus] (__STDIO_INLINE): Define as inline.
* po/de.po, po/sv.po: Update from 2.0.5 translations.
* sysdeps/unix/sysv/linux/netinet/tcp.h: Pretty print.
* sunrpc/rpc/xdr.h (XDR): Don't define argument of x_destroy callback
as const.
* sunrpc/xdr_mem.c (xdrmem_destroy): Don't define argument as const.
* sunrpx/xdr_rec.c (xdrrec_destroy): Likewise.
* sunrpx/xdr_stdio.c (xdrstdio_destroy): Likewise.
1997-08-27 18:47 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/if_index.c: Include <errno.h>.
Reported by Benjamin Kosnik <bkoz@cygnus.com>.
1997-08-27 02:27 Roland McGrath <roland@baalperazim.frob.com>
* abi-tags: New file.
* csu/Makefile (distribute): Remove abi-tag.h.
($(objpfx)abi-tag.h): New target.
* Makefile (distribute): Add abi-tags.
* sysdeps/unix/sysv/linux/abi-tag.h: File removed.
* sysdeps/mach/hurd/abi-tag.h: File removed.
* sysdeps/stub/abi-tag.h: File removed.
1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/make-syscalls.sh: Change output so that it
generates compilation rules only for the currently selected object
suffixes.
1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/m68k/dl-machine.h (RTLD_START): Switch back to previous
section to avoid confusing the compiler.
* sysdeps/alpha/dl-machine.h (RTLD_START): Likewise.
* sysdeps/i386/dl-machine.h (RTLD_START): Likewise.
* sysdeps/mips/dl-machine.h (RTLD_START): Likewise.
* sysdeps/mips/mips64/dl-machine.h (RTLD_START): Likewise.
* sysdeps/sparc/sparc32/dl-machine.h (RTLD_START): Likewise.
* sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use a GOT
relocation instead of a constant to avoid text relocation.
(ELF_MACHINE_BEFORE_RTLD_RELOC): Removed.
(RTLD_START): Declare global labels as functions and add size
directive.
1997-08-25 17:01 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/i386/bits/select.h: Correct assembler versions to work even
for descriptors >= 32.
* stdlib/alloca.h: Don't define alloca to __alloca since if gcc
is used __alloca is not defined to __builtin_alloca and so might
not be available.
Reported by Uwe Ohse <uwe@ohse.de>.
* sysdeps/unix/sysv/linux/sys/sysmacros.h: Define macros in a special
way if gcc is not used and so dev_t is an array.
Reported by Uwe Ohse <uwe@ohse.de>.
1997-08-23 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* manual/libc.texinfo: Reorder chapters to match logical order.
1997-08-25 12:22 Ulrich Drepper <drepper@cygnus.com>
* sunrpc/rpc/xdr.h: Change name of parameters in prototypes of
xdr_reference, xdrmem_create, and xdrstdio_create because of clash
with g++ internal symbols.
Patch by Sudish Joseph <sj@eng.mindspring.net>.
* elf/dl-deps.c: Implement handling of DT_FILTER.
Diffstat (limited to 'db2/hash')
| -rw-r--r-- | db2/hash/hash.c | 1440 | ||||
| -rw-r--r-- | db2/hash/hash.src | 211 | ||||
| -rw-r--r-- | db2/hash/hash_auto.c | 1343 | ||||
| -rw-r--r-- | db2/hash/hash_conv.c | 101 | ||||
| -rw-r--r-- | db2/hash/hash_debug.c | 96 | ||||
| -rw-r--r-- | db2/hash/hash_dup.c | 544 | ||||
| -rw-r--r-- | db2/hash/hash_func.c | 219 | ||||
| -rw-r--r-- | db2/hash/hash_page.c | 1775 | ||||
| -rw-r--r-- | db2/hash/hash_rec.c | 810 | ||||
| -rw-r--r-- | db2/hash/hash_stat.c | 58 |
10 files changed, 6597 insertions, 0 deletions
diff --git a/db2/hash/hash.c b/db2/hash/hash.c new file mode 100644 index 0000000000..6d8c40057d --- /dev/null +++ b/db2/hash/hash.c @@ -0,0 +1,1440 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996, 1997 + * Sleepycat Software. All rights reserved. + */ +/* + * Copyright (c) 1990, 1993, 1994 + * Margo Seltzer. All rights reserved. + */ +/* + * Copyright (c) 1990, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Margo Seltzer. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "config.h" + +#ifndef lint +static const char sccsid[] = "@(#)hash.c 10.25 (Sleepycat) 8/24/97"; +#endif /* not lint */ + +#ifndef NO_SYSTEM_INCLUDES +#include <sys/types.h> +#include <sys/stat.h> + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#endif + +#include "shqueue.h" +#include "db_int.h" +#include "db_page.h" +#include "db_am.h" +#include "db_ext.h" +#include "hash.h" +#include "log.h" + +static int __ham_c_close __P((DBC *)); +static int __ham_c_del __P((DBC *, int)); +static int __ham_c_get __P((DBC *, DBT *, DBT *, int)); +static int __ham_c_put __P((DBC *, DBT *, DBT *, int)); +static int __ham_c_init __P((DB *, DB_TXN *, DBC **)); +static int __ham_cursor __P((DB *, DB_TXN *, DBC **)); +static int __ham_delete __P((DB *, DB_TXN *, DBT *, int)); +static int __ham_dup_return __P((HTAB *, HASH_CURSOR *, DBT *, int)); +static int __ham_get __P((DB *, DB_TXN *, DBT *, DBT *, int)); +static void __ham_init_htab __P((HTAB *)); +static int __ham_lookup __P((HTAB *, + HASH_CURSOR *, const DBT *, u_int32_t, db_lockmode_t)); +static int __ham_overwrite __P((HTAB *, HASH_CURSOR *, DBT *)); +static int __ham_put __P((DB *, DB_TXN *, DBT *, DBT *, int)); +static int __ham_sync __P((DB *, int)); + +/************************** INTERFACE ROUTINES ***************************/ +/* OPEN/CLOSE */ + +/* + * __ham_open -- + * + * PUBLIC: int __ham_open __P((DB *, DB_INFO *)); + */ +int +__ham_open(dbp, dbinfo) + DB *dbp; + DB_INFO *dbinfo; +{ + DB_ENV *dbenv; + DBC *curs; + HTAB *hashp; + int file_existed, ret; + + dbenv = dbp->dbenv; + + if ((hashp = (HTAB *)calloc(1, sizeof(HTAB))) == NULL) + return (ENOMEM); + hashp->dbp = dbp; + + /* Set the hash function if specified by the user. */ + if (dbinfo != NULL && dbinfo->h_hash != NULL) + hashp->hash = dbinfo->h_hash; + + /* + * Initialize the remaining fields of the dbp. The type, close and + * fd functions are all set in db_open. + */ + dbp->internal = hashp; + dbp->cursor = __ham_cursor; + dbp->del = __ham_delete; + dbp->get = __ham_get; + dbp->put = __ham_put; + dbp->sync = __ham_sync; + + /* If locking is turned on, lock the meta data page. */ + if (F_ISSET(dbp, DB_AM_LOCKING)) { + dbp->lock.pgno = BUCKET_INVALID; + if ((ret = lock_get(dbenv->lk_info, dbp->locker, + 0, &dbp->lock_dbt, DB_LOCK_READ, &hashp->hlock)) != 0) { + if (ret < 0) + ret = EAGAIN; + goto out; + } + } + + /* + * Now, we can try to read the meta-data page and figure out + * if we set up locking and get the meta-data page properly. + * If this is a new file, initialize it, and put it back dirty. + */ + if ((ret = __ham_get_page(hashp->dbp, 0, (PAGE **)&hashp->hdr)) != 0) + goto out; + + /* Initialize the hashp structure */ + if (hashp->hdr->magic == DB_HASHMAGIC) { + file_existed = 1; + /* File exists, verify the data in the header. */ + if (hashp->hash == NULL) + hashp->hash = + hashp->hdr->version < 5 ? __ham_func4 : __ham_func5; + if (hashp->hash(CHARKEY, sizeof(CHARKEY)) != + hashp->hdr->h_charkey) { + __db_err(hashp->dbp->dbenv, + "hash: incompatible hash function"); + ret = EINVAL; + goto out; + } + if (F_ISSET(hashp->hdr, DB_HASH_DUP)) + F_SET(dbp, DB_AM_DUP); + } else { + /* + * File does not exist, we must initialize the header. If + * locking is enabled that means getting a write lock first. + */ + file_existed = 0; + if (F_ISSET(dbp, DB_AM_LOCKING) && + ((ret = lock_put(dbenv->lk_info, hashp->hlock)) != 0 || + (ret = lock_get(dbenv->lk_info, dbp->locker, 0, + &dbp->lock_dbt, DB_LOCK_WRITE, &hashp->hlock)) != 0)) { + if (ret < 0) + ret = EAGAIN; + goto out; + } + + hashp->hdr->nelem = dbinfo != NULL ? dbinfo->h_nelem : 0; + hashp->hdr->ffactor = + dbinfo != NULL && dbinfo->h_ffactor ? dbinfo->h_ffactor : 0; + __ham_init_htab(hashp); + if (F_ISSET(dbp, DB_AM_DUP)) + F_SET(hashp->hdr, DB_HASH_DUP); + if ((ret = __ham_dirty_page(hashp, (PAGE *)hashp->hdr)) != 0) + goto out; + } + + /* Initialize the default cursor. */ + __ham_c_init(dbp, NULL, &curs); + TAILQ_INSERT_TAIL(&dbp->curs_queue, curs, links); + + /* Allocate memory for our split buffer. */ + if ((hashp->split_buf = (PAGE *)malloc(dbp->pgsize)) == NULL) { + ret = ENOMEM; + goto out; + } + +#ifdef NO_STATISTICS_FOR_DB_ERR + __db_err(dbp->dbenv, + "%s%lx\n%s%ld\n%s%ld\n%s%ld\n%s%ld\n%s0x%lx\n%s0x%lx\n%s%ld\n%s%ld\n%s0x%lx", + "TABLE POINTER ", (long)hashp, + "BUCKET SIZE ", (long)hashp->hdr->pagesize, + "FILL FACTOR ", (long)hashp->hdr->ffactor, + "MAX BUCKET ", (long)hashp->hdr->max_bucket, + "OVFL POINT ", (long)hashp->hdr->ovfl_point, + "LAST FREED ", (long)hashp->hdr->last_freed, + "HIGH MASK ", (long)hashp->hdr->high_mask, + "LOW MASK ", (long)hashp->hdr->low_mask, + "NELEM ", (long)hashp->hdr->nelem, + "FLAGS ", (long)hashp->hdr->flags); +#endif + + /* Release the meta data page */ + (void)__ham_put_page(hashp->dbp, (PAGE *)hashp->hdr, 0); + if (F_ISSET(dbp, DB_AM_LOCKING) && + (ret = lock_put(dbenv->lk_info, hashp->hlock)) != 0) { + if (ret < 0) + ret = EAGAIN; + goto out; + } + + hashp->hlock = 0; + hashp->hdr = NULL; + /* Sync the file so that we know that the meta data goes to disk. */ + if (!file_existed && (ret = dbp->sync(dbp, 0)) != 0) + goto out; + return (0); + +out: (void)__ham_close(dbp); + return (ret); +} + +/* + * PUBLIC: int __ham_close __P((DB *)); + */ +int +__ham_close(dbp) + DB *dbp; +{ + HTAB *hashp; + int ret, t_ret; + + DEBUG_LWRITE(dbp, NULL, "ham_close", NULL, NULL, 0); + hashp = (HTAB *)dbp->internal; + ret = 0; + + /* Free the split page. */ + if (hashp->split_buf) + FREE(hashp->split_buf, dbp->pgsize); + + if (hashp->hdr && (t_ret = __ham_put_page(hashp->dbp, + (PAGE *)hashp->hdr, 0)) != 0 && ret == 0) + ret = t_ret; + if (hashp->hlock && (t_ret = lock_put(hashp->dbp->dbenv->lk_info, + hashp->hlock)) != 0 && ret == 0) + ret = t_ret; + + FREE(hashp, sizeof(HTAB)); + dbp->internal = NULL; + return (ret); +} + +/************************** LOCAL CREATION ROUTINES **********************/ +/* + * Returns 0 on No Error + */ +static void +__ham_init_htab(hashp) + HTAB *hashp; +{ + u_int32_t nelem; + int32_t l2, nbuckets; + + nelem = hashp->hdr->nelem; + hashp->hdr->pagesize = hashp->dbp->pgsize; + ZERO_LSN(hashp->hdr->lsn); + hashp->hdr->magic = DB_HASHMAGIC; + hashp->hdr->version = DB_HASHVERSION; + if (hashp->hash == NULL) + hashp->hash = + hashp->hdr->version < 5 ? __ham_func4 : __ham_func5; + hashp->hdr->h_charkey = hashp->hash(CHARKEY, sizeof(CHARKEY)); + if (nelem != 0 && hashp->hdr->ffactor != 0) { + nelem = (nelem - 1) / hashp->hdr->ffactor + 1; + l2 = __db_log2(nelem > 2 ? nelem : 2); + } else + l2 = 2; + + nbuckets = 1 << l2; + + hashp->hdr->spares[l2] = 0; + hashp->hdr->spares[l2 + 1] = 0; + hashp->hdr->ovfl_point = l2; + hashp->hdr->last_freed = PGNO_INVALID; + + hashp->hdr->max_bucket = hashp->hdr->high_mask = nbuckets - 1; + hashp->hdr->low_mask = (nbuckets >> 1) - 1; + memcpy(hashp->hdr->uid, hashp->dbp->lock.fileid, DB_FILE_ID_LEN); +} + +/********************** DESTROY/CLOSE ROUTINES ************************/ + + +/* + * Write modified pages to disk + * + * Returns: + * 0 == OK + * -1 ERROR + */ +static int +__ham_sync(dbp, flags) + DB *dbp; + int flags; +{ + int ret; + + DEBUG_LWRITE(dbp, NULL, "ham_sync", NULL, NULL, flags); + if ((ret = __db_syncchk(dbp, flags)) != 0) + return (ret); + if (F_ISSET(dbp, DB_AM_RDONLY)) + return (0); + + if ((ret = memp_fsync(dbp->mpf)) == DB_INCOMPLETE) + ret = 0; + + return (ret); +} + +/*******************************SEARCH ROUTINES *****************************/ +/* + * All the access routines return + * + * Returns: + * 0 on SUCCESS + * 1 to indicate an external ERROR (i.e. key not found, etc) + * -1 to indicate an internal ERROR (i.e. out of memory, etc) + */ + +static int +__ham_get(dbp, txn, key, data, flags) + DB *dbp; + DB_TXN *txn; + DBT *key; + DBT *data; + int flags; +{ + DB *ldbp; + DBC *cp; + HTAB *hashp; + HASH_CURSOR *hcp; + int ret, t_ret; + + DEBUG_LREAD(dbp, txn, "ham_get", key, NULL, flags); + if ((ret = __db_getchk(dbp, key, data, flags)) != 0) + return (ret); + + ldbp = dbp; + if (F_ISSET(dbp, DB_AM_THREAD) && + (ret = __db_gethandle(dbp, __ham_hdup, &ldbp)) != 0) + return (ret); + + hashp = (HTAB *)ldbp->internal; + SET_LOCKER(ldbp, txn); + GET_META(ldbp, hashp); + cp = TAILQ_FIRST(&ldbp->curs_queue); + + hashp->hash_accesses++; + hcp = (HASH_CURSOR *)TAILQ_FIRST(&ldbp->curs_queue)->internal; + if ((ret = __ham_lookup(hashp, hcp, key, 0, DB_LOCK_READ)) == 0) + if (F_ISSET(hcp, H_OK)) + ret = __ham_dup_return(hashp, hcp, data, DB_FIRST); + else /* Key was not found */ + ret = DB_NOTFOUND; + + if ((t_ret = __ham_item_done(hashp, hcp, 0)) != 0 && ret == 0) + ret = t_ret; + RELEASE_META(ldbp, hashp); + if (F_ISSET(dbp, DB_AM_THREAD)) + __db_puthandle(ldbp); + return (ret); +} + +static int +__ham_put(dbp, txn, key, data, flags) + DB *dbp; + DB_TXN *txn; + DBT *key; + DBT *data; + int flags; +{ + DB *ldbp; + HTAB *hashp; + HASH_CURSOR *hcp; + DBT tmp_val, *myval; + int ret, t_ret; + u_int32_t nbytes; + + DEBUG_LWRITE(dbp, txn, "ham_put", key, data, flags); + if ((ret = __db_putchk(dbp, key, data, + flags, F_ISSET(dbp, DB_AM_RDONLY), F_ISSET(dbp, DB_AM_DUP))) != 0) + return (ret); + + ldbp = dbp; + if (F_ISSET(dbp, DB_AM_THREAD) && + (ret = __db_gethandle(dbp, __ham_hdup, &ldbp)) != 0) + return (ret); + + hashp = (HTAB *)ldbp->internal; + SET_LOCKER(ldbp, txn); + GET_META(ldbp, hashp); + hcp = TAILQ_FIRST(&ldbp->curs_queue)->internal; + + nbytes = (ISBIG(hashp, key->size) ? HOFFPAGE_PSIZE : + HKEYDATA_PSIZE(key->size)) + + (ISBIG(hashp, data->size) ? HOFFPAGE_PSIZE : + HKEYDATA_PSIZE(data->size)); + + hashp->hash_accesses++; + ret = __ham_lookup(hashp, hcp, key, nbytes, DB_LOCK_WRITE); + + if (ret == DB_NOTFOUND) { + ret = 0; + if (hcp->seek_found_page != PGNO_INVALID && + hcp->seek_found_page != hcp->pgno) { + if ((ret = __ham_item_done(hashp, hcp, 0)) != 0) + goto out; + hcp->pgno = hcp->seek_found_page; + hcp->bndx = NDX_INVALID; + } + + if (F_ISSET(data, DB_DBT_PARTIAL) && data->doff != 0) { + /* + * Doing a partial put, but the key does not exist + * and we are not beginning the write at 0. We + * must create a data item padded up to doff and + * then write the new bytes represented by val. + */ + ret = __ham_init_dbt(&tmp_val, data->size + data->doff, + &hcp->big_data, &hcp->big_datalen); + if (ret == 0) { + memset(tmp_val.data, 0, data->doff); + memcpy((u_int8_t *)tmp_val.data + data->doff, + data->data, data->size); + myval = &tmp_val; + } + } else + myval = (DBT *)data; + + if (ret == 0) + ret = __ham_add_el(hashp, hcp, key, myval, H_KEYDATA); + } else if (ret == 0 && F_ISSET(hcp, H_OK)) { + if (flags == DB_NOOVERWRITE) + ret = DB_KEYEXIST; + else if (F_ISSET(ldbp, DB_AM_DUP)) + ret = __ham_add_dup(hashp, hcp, data, DB_KEYLAST); + else + ret = __ham_overwrite(hashp, hcp, data); + } + + /* Free up all the cursor pages. */ + if ((t_ret = __ham_item_done(hashp, hcp, ret == 0)) != 0 && ret == 0) + ret = t_ret; + /* Now check if we have to grow. */ +out: if (ret == 0 && F_ISSET(hcp, H_EXPAND)) { + ret = __ham_expand_table(hashp); + F_CLR(hcp, H_EXPAND); + } + + if ((t_ret = __ham_item_done(hashp, hcp, ret == 0)) != 0 && ret == 0) + ret = t_ret; + RELEASE_META(ldbp, hashp); + if (F_ISSET(dbp, DB_AM_THREAD)) + __db_puthandle(ldbp); + return (ret); +} + +static int +__ham_cursor(dbp, txnid, dbcp) + DB *dbp; + DB_TXN *txnid; + DBC **dbcp; +{ + int ret; + + DEBUG_LWRITE(dbp, txnid, "ham_cursor", NULL, NULL, 0); + if ((ret = __ham_c_init(dbp, txnid, dbcp)) != 0) + return (ret); + + DB_THREAD_LOCK(dbp); + TAILQ_INSERT_TAIL(&dbp->curs_queue, *dbcp, links); + DB_THREAD_UNLOCK(dbp); + return (ret); +} + +static int +__ham_c_init(dbp, txnid, dbcp) + DB *dbp; + DB_TXN *txnid; + DBC **dbcp; +{ + DBC *db_curs; + HASH_CURSOR *new_curs; + |
