diff options
author | Ulrich Drepper <drepper@redhat.com> | 1997-11-12 00:06:02 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 1997-11-12 00:06:02 +0000 |
commit | cc3fa755128c70f8afc2d604936f33e4d7d652d8 (patch) | |
tree | 0c68c1298140e1524078e8bfdf5154fb6129b680 /db2/btree/bt_cursor.c | |
parent | 86187531d302de284b67ac162cf76c60c86bd7da (diff) | |
download | glibc-cc3fa755128c70f8afc2d604936f33e4d7d652d8.tar.gz glibc-cc3fa755128c70f8afc2d604936f33e4d7d652d8.tar.xz glibc-cc3fa755128c70f8afc2d604936f33e4d7d652d8.zip |
Update. cvs/libc-ud-971111
1997-11-11 21:30 Ulrich Drepper <drepper@cygnus.com> * include/sys/stat.h: Define stat, fstat, lstat and *64 variants as macros so the the library compiles correctly even without optimization. * io/fstat.c: Undef fstat. * io/fstat64.c: Undef fstat64 * io/lstat.c: Undef lstat. * io/lstat64.c: Undef lstat64 * io/stat.c: Undef stat. * io/stat64.c: Undef stat64 * io/fts.c: Include <include/sys/stat.h> to get macro definitions. * io/ftw.c: Likewise. * io/getdirname.c: Likewise. * Makefile (install): Run test-installation.pl if possible. * db2/Makefile: Update from db-2.3.12. * db2/db.h: Likewise. * db2/db_int.h: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.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/btree/btree_auto.c: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.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/btree/btree_auto.c: Likewise. * db2/common/db_appinit.c: Likewise. * db2/common/db_apprec.c: Likewise. * db2/common/db_byteorder.c: Likewise. * db2/common/db_region.c: Likewise. * db2/db/db.c: Likewise * db2/db/db.src: Likewise * db2/db/db_auto.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/db185/db185.c: Likewise. * db2/hash/hash.c: Likewise. * db2/hash/hash.src: Likewise. * db2/hash/hash_auto.c: Likewise. * db2/hash/hash_dup.c: Likewise. * db2/hash/hash_page.c: Likewise. * db2/hash/hash_rec.c: Likewise. * db2/include/btree_auto.h: Likewise. * db2/include/btree_ext.h: Likewise. * db2/include/clib_ext.h: Likewise. * db2/include/common_ext.h: Likewise. * db2/include/db.h.src: Likewise. * db2/include/db_am.h: Likewise. * db2/include/db_auto.h: Likewise. * db2/include/db_cxx.h: Likewise. * db2/include/db_ext.h: Likewise. * db2/include/db_int.h.src: Likewise. * db2/include/hash.h: Likewise. * db2/include/hash_auto.h: Likewise. * db2/include/hash_ext.h: Likewise. * db2/include/lock.h: Likewise. * db2/include/lock_ext.h: Likewise. * db2/include/log.h: Likewise. * db2/include/log_ext.h: Likewise. * db2/include/mp.h: Likewise. * db2/include/mp_ext.h: Likewise. * db2/include/mutex_ext.h: Likewise. * db2/include/os_ext.h: Likewise. * db2/include/os_func.h: Likewise. * db2/include/txn.h: Likewise. * db2/include/txn_ext.h: Likewise. * db2/lock/lock.c: Likewise. * db2/lock/lock_deadlock.c: Likewise. * db2/log/log.c: Likewise. * db2/log/log_archive.c: Likewise. * db2/log/log_auto.c: Likewise. * db2/log/log_findckp.c: Likewise. * db2/log/log_get.c: Likewise. * db2/log/log_put.c: Likewise. * db2/log/log_rec.c: Likewise. * db2/log/log_register.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_pr.c: Likewise. * db2/mp/mp_region.c: Likewise. * db2/mp/mp_sync.c: Likewise. * db2/mutex/mutex.c: Likewise. * db2/os/os_abs.c: Likewise. * db2/os/os_dir.c: Likewise. * db2/os/os_fid.c: Likewise. * db2/os/os_fsync.c: Likewise. * db2/os/os_func.c: Likewise. * db2/os/os_map.c: Likewise. * db2/os/os_oflags.c: Likewise. * db2/os/os_open.c: Likewise. * db2/os/os_rpath.c: Likewise. * db2/os/os_rw.c: Likewise. * db2/os/os_seek.c: Likewise. * db2/os/os_sleep.c: Likewise. * db2/os/os_stat.c: Likewise. * db2/os/os_unlink.c: Likewise. * db2/progs/db_deadlock/db_deadlock.c: Likewise. * db2/progs/db_dump/db_dump.c: Likewise. * db2/progs/db_load/db_load.c: Likewise. * db2/progs/db_recover/db_recover.c: Likewise. * db2/progs/db_stat/db_stat.c: Likewise. * db2/txn/txn.c: Likewise. * db2/txn/txn_auto.c: Likewise. * db2/txn/txn_rec.c: Likewise. * db2/os/db_os_abs.c: Removed. * db2/os/db_os_dir.c: Removed. * db2/os/db_os_fid.c: Removed. * db2/os/db_os_lseek.c: Removed. * db2/os/db_os_mmap.c: Removed. * db2/os/db_os_open.c: Removed. * db2/os/db_os_rw.c: Removed. * db2/os/db_os_sleep.c: Removed. * db2/os/db_os_stat.c: Removed. * db2/os/db_os_unlink.c: Removed. * libio/stdio.h (fopen): Add __restrict to parameters. * manual/process.texi (system): Describe behaviour for NULL argument. * stdio-common/printf-parse.h: Parse hh modifier. * stdio-common/vfprintf.c: Handle hh modifier. * stdio-common/vfscanf.c: Likewise. * manual/stdio.texi: Describe hh modifier for scanf/printf. * math/complex.h: Don't define _Imaginary_I, but instead _Complex_I. gcc does no yet know the `imaginary' keyword. * math/test-math.c: Add little test for know gcc bug. * math/tgmath.h: Make complex versions of log10() only available if __USE_GNU. * stdlib/test-canon.c: Fix typo. * sysdeps/generic/setenv.c: Avoid compilation warnings. Reported by Jim Meyering. * sysdeps/generic/bits/errno.h: EILSEQ is an ISO C error number. * sysdeps/mach/hurd/bits/errno.h: Likewise. * sysdeps/standalone/bits/errno.h: Likewise. * sysdeps/unix/sysv/linux/bits/errno.h: Likewise. * sysdeps/i386/i586/memcpy.S: New file. * sysdeps/i386/i586/mempcpy.S: New file. * sysdeps/i386/i586/memset.S: Fix typo. * sysdeps/posix/getcwd.c: Define HAVE_MEMPCPY for _LIBC. Add casts. * sysdeps/posix/system.c: Add comment to explain code. * sysdeps/wordsize-32/inttypes.h: Include <stddef.h> for wchar_t. Define PTRDIFF_{MIN,MAX}, SIG_ATOMIC_{MIN,MAX}, SIZE_MAX, WCHAR_{MIN,MAX}, WINT_{MIN,MAX}. Define wcstoimax, wcstoumax. * sysdeps/wordsize-64/inttypes.h: Likewise. * wcsmbs/wchar.h: Define WCHAR_{MIN,MAX} if not already defined. Declare __wcsto{l,ul,ll,ull}_internal only if not already done. * time/Makefile (routines): Add strfxtime. * time/strftime.c: Implement %F and %f format. * time/strfxtime.c: New file. * time/time.h: Define new types and symbols from ISO C 9X. * time/mktime.c: Little comment correction. 1997-11-10 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/libm-ieee754/s_sincosl.c: Fix typo. * sysdeps/libm-ieee754/s_tanl.c: Fix typo. * sysdeps/libm-ieee754/s_floorl.c: Correct typos. * sysdeps/libm-ieee754/e_remainderl.c: Replace EXTRACT_LDOUBLE_WORDS by GET_LDOUBLE_WORDS. * sysdeps/libm-ieee754/e_atan2l.c: Replace EXTRACT_LDOUBLE_WORDS by GET_LDOUBLE_WORDS. * sysdeps/libm-ieee754/s_scalbnl.c: Replace ";" by "," for correct variable declaration. * sysdeps/libm-ieee754/s_scalblnl.c: Likewise. * sysdeps/libm-ieee754/s_lrint.c (__lrint): Correct function. * math/libm-test.c (sqrt_test): Add test for sqrt (0.25). (asin_test): Add more test. 1997-11-10 23:34 Ulrich Drepper <drepper@cygnus.com> * sysdeps/libm-ieee754/e_asin.c: Add braces to make code clearer and to not confuse the poor compiler. * sysdeps/libm-ieee754/e_asinf.c: Likewise. Reported by vertex@cagent.com. 1997-11-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/dl-lookup.c (do_lookup): Don't accept the base version if we require a specific one. * libio/oldfreopen.c: Bind old symbols to version GLIBC_2.0. * libio/oldiofopen.c: Likewise. * libio/oldstdfiles.c: Likewise. * libc.map: Export them. 1997-11-10 07:40 H.J. Lu <hjl@gnu.ai.mit.edu> * stdlib/exit.c (exit): Handle recursive calls to exit (). 1997-11-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/fpu/s_llrint.c: Fixed to take double argument instead of long double. * sysdeps/m68k/fpu/s_llrintf.c: New file. * sysdeps/m68k/fpu/s_llrintl.c: New file. * sysdeps/libm-ieee754/s_llrint.c: Make compilable and fix overflow condition. * sysdeps/libm-ieee754/s_llrintf.c: Fix overflow condition. * sysdeps/libm-ieee754/s_llrintl.c: Likewise. * sysdeps/libm-ieee754/s_llround.c: Likewise. * sysdeps/libm-ieee754/s_llroundf.c: Likewise. * sysdeps/libm-ieee754/s_llroundl.c: Likewise. * sysdeps/libm-ieee754/s_lrint.c: Likewise. * sysdeps/libm-ieee754/s_lrintf.c: Likewise. * sysdeps/libm-ieee754/s_lrintl.c: Likewise. * sysdeps/libm-ieee754/s_lround.c: Likewise. * sysdeps/libm-ieee754/s_lroundf.c: Likewise. * sysdeps/libm-ieee754/s_lroundl.c: Likewise. * math/libm-test.c: Test all three variants of lrint and llrint. Fix typos in lround and llround tests. Add tests for boundary cases for lrint and llround. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/arith.texi: Misc doc fixes. * manual/ctype.texi: Likewise. * manual/pattern.texi: Likewise. * manual/terminal.texi: Likewise. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/xstatconv.c: Use struct assignment instead of memcpy to let the compiler use whatever it regards as optimal. * sysdeps/unix/sysv/linux/alpha/xstatconv.c: Likewise. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/Makefile (sysdep_headers) [$(subdir)=misc]: Add sys/prctl.h. * sysdeps/unix/sysv/linux/Dist: Distribute it. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * io/ftwtest-sh: Don't use the unknown which command, instead try pwd as /bin/pwd and /usr/bin/pwd. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/maint.texi (Tools for Installation): Don't recommend broken version 3.76.1 of make. (Porting): Fix wording. 1997-11-06 06:13 H.J. Lu <hjl@gnu.ai.mit.edu> * config.make.in (build-pic-default): New, defined with pic_default. * configure.in (pic_default): New, set to yes if PIC is default. * Makeconfig (CPPFLAGS-.o, CPPFLAGS-.op, CPPFLAGS-.og, CPPFLAGS-.ob): Add -DPIC if $(build-pic-default) is yes. 1997-11-09 18:15 Ulrich Drepper <drepper@cygnus.com> * Makerules (libc.so): Fix typo. * csu/Makefile (CFLAGS-initfini.s): Correctly fix moving function definition. Patch by Zack Weinberg <zack@rabi.phys.columbia.edu>. * stdlib/strtod.c: Handle numbers like 0.0e10000 correctly which produce ±0.0. Reported by Joe Keane <jgk@jgk.org>. * sysdeps/libm-ieee754/s_ceill.c: Fix typos. * sysdeps/libm-ieee754/s_llrint.c: Correct code, it never worked. 1997-11-06 07:00 H.J. Lu <hjl@gnu.ai.mit.edu> * sysdeps/unix/sysv/i386/i686/time.S: Removed. 1997-11-08 14:07 Thorsten Kukuk <kukuk@vt.uni-paderborn.de> * nis/libnsl.map: Add __do_niscall2 for nis_cachemgr. * nis/nis_call.c: Set UDP resend timeout correct. * nis/nss_compat/compat-grp.c: Rewritten to make it faster. * nis/nss_compat/compat-pwd.c: Likewise. * nis/nss_compat/compat-spwd.c: Likewise. * nis/ypclnt.c: Fix UDP resend timeout, fix yp_bind/do_ypcall interaction. * inet/protocols/routed.h: Include sys/socket.h. * inet/protocols/talkd.h: Likewise. * inet/protocols/timed.h: Include rpc/types.h. * sunrpc/rpc/pmap_clnt.h: Include rpc/clnt.h. 1997-11-06 01:39 Ulrich Drepper <drepper@cygnus.com> * Makerules (libc.so): Add missing closing brace. 1997-11-05 Brendan Kehoe <brendan@lisa.cygnus.com> * libio.h (__P): Name its arg `p' instead of `params'. This was added solely to work around problems with the definition of __P in the Solaris math.h header.
Diffstat (limited to 'db2/btree/bt_cursor.c')
-rw-r--r-- | db2/btree/bt_cursor.c | 152 |
1 files changed, 81 insertions, 71 deletions
diff --git a/db2/btree/bt_cursor.c b/db2/btree/bt_cursor.c index a1266bcd3c..e5f3faeb70 100644 --- a/db2/btree/bt_cursor.c +++ b/db2/btree/bt_cursor.c @@ -8,7 +8,7 @@ #include "config.h" #ifndef lint -static const char sccsid[] = "@(#)bt_cursor.c 10.33 (Sleepycat) 9/24/97"; +static const char sccsid[] = "@(#)bt_cursor.c 10.35 (Sleepycat) 10/25/97"; #endif /* not lint */ #ifndef NO_SYSTEM_INCLUDES @@ -62,10 +62,10 @@ __bam_cursor(dbp, txn, dbcp) DEBUG_LWRITE(dbp, txn, "bam_cursor", NULL, NULL, 0); - if ((dbc = (DBC *)calloc(1, sizeof(DBC))) == NULL) + if ((dbc = (DBC *)__db_calloc(1, sizeof(DBC))) == NULL) return (ENOMEM); - if ((cp = (CURSOR *)calloc(1, sizeof(CURSOR))) == NULL) { - free(dbc); + if ((cp = (CURSOR *)__db_calloc(1, sizeof(CURSOR))) == NULL) { + __db_free(dbc); return (ENOMEM); } @@ -474,7 +474,7 @@ __bam_c_rget(dbp, cp, key, data, flags) __bam_stkrel(dbp); err: (void)memp_fput(dbp->mpf, cp->page, 0); - free(dbt.data); + __db_free(dbt.data); return (ret); } @@ -1422,7 +1422,7 @@ __bam_c_physdel(dbp, cp, h) DB_LOCK lock; db_indx_t indx; db_pgno_t pgno, next_pgno, prev_pgno; - int local, ret; + int local, normal, ret; t = dbp->internal; ret = 0; @@ -1457,51 +1457,65 @@ __bam_c_physdel(dbp, cp, h) local = 0; /* - * If we're deleting a duplicate entry, call the common code to do - * the work. + * If we're deleting a duplicate entry and there are other duplicate + * entries remaining, call the common code to do the work and fix up + * the parent page as necessary. Otherwise, do a normal btree delete. + * + * There are 5 possible cases: + * + * 1. It's not a duplicate item: do a normal btree delete. + * 2. It's a duplicate item: + * 2a: We delete an item from a page of duplicates, but there are + * more items on the page. + * 2b: We delete the last item from a page of duplicates, deleting + * the last duplicate. + * 2c: We delete the last item from a page of duplicates, but there + * is a previous page of duplicates. + * 2d: We delete the last item from a page of duplicates, but there + * is a following page of duplicates. + * + * In the case of: + * + * 1: There's nothing further to do. + * 2a: There's nothing further to do. + * 2b: Do the normal btree delete instead of a duplicate delete, as + * that deletes both the duplicate chain and the parent page's + * entry. + * 2c: There's nothing further to do. + * 2d: Delete the duplicate, and update the parent page's entry. */ if (TYPE(h) == P_DUPLICATE) { pgno = PGNO(h); prev_pgno = PREV_PGNO(h); next_pgno = NEXT_PGNO(h); - if ((ret = __db_drem(dbp, &h, indx, __bam_free)) != 0) - goto err; - /* - * There are 4 cases: - * - * 1. We removed an item on a page, but there are more items - * on the page. - * 2. We removed the last item on a page, removing the last - * duplicate. - * 3. We removed the last item on a page, but there is a - * following page of duplicates. - * 4. We removed the last item on a page, but there is a - * previous page of duplicates. - * - * In case 1, h != NULL, h->pgno == pgno - * In case 2, h == NULL, - * prev_pgno == PGNO_INVALID, next_pgno == PGNO_INVALID - * In case 3, h != NULL, next_pgno != PGNO_INVALID - * In case 4, h == NULL, prev_pgno != PGNO_INVALID - * - * In case 1, there's nothing else to do. - * In case 2, remove the entry from the parent page. - * In case 3 or 4, if the deleted page was the first in a chain - * of duplicate pages, update the parent page's entry. - * - * Test: - * If there were previous pages of duplicates or we didn't - * empty the current page of duplicates, we don't need to - * touch the parent page. - */ - if (prev_pgno != PGNO_INVALID || (h != NULL && pgno == h->pgno)) - goto done; + if (NUM_ENT(h) == 1 && + prev_pgno == PGNO_INVALID && next_pgno == PGNO_INVALID) + normal = 1; + else { + normal = 0; - /* - * Release any page we're holding and the lock on the deleted - * page. - */ + /* Delete the duplicate. */ + if ((ret = __db_drem(dbp, &h, indx, __bam_free)) != 0) + goto err; + + /* + * 2a: h != NULL, h->pgno == pgno + * 2b: We don't reach this clause, as the above test + * was true. + * 2c: h == NULL, prev_pgno != PGNO_INVALID + * 2d: h != NULL, next_pgno != PGNO_INVALID + * + * Test for 2a and 2c: if we didn't empty the current + * page or there was a previous page of duplicates, we + * don't need to touch the parent page. + */ + if ((h != NULL && pgno == h->pgno) || + prev_pgno != PGNO_INVALID) + goto done; + } + + /* Release any page we're holding and its lock. */ if (local) { if (h != NULL) (void)memp_fput(dbp->mpf, h, 0); @@ -1519,37 +1533,33 @@ __bam_c_physdel(dbp, cp, h) } local = 1; - /* - * If we deleted the last duplicate, we can fall out and do a - * normal btree delete in the context of the parent page. If - * not, we have to update the parent's page. - */ + /* Switch to the parent page's entry. */ indx = cp->indx; - if (next_pgno != PGNO_INVALID) { - /* - * Copy, delete, update and re-insert the parent page's - * entry. - */ - bo = *GET_BOVERFLOW(h, indx); - (void)__db_ditem(dbp, h, indx, BOVERFLOW_SIZE); - bo.pgno = next_pgno; - memset(&dbt, 0, sizeof(dbt)); - dbt.data = &bo; - dbt.size = BOVERFLOW_SIZE; - (void)__db_pitem(dbp, - h, indx, BOVERFLOW_SIZE, &dbt, NULL); - - /* Discard the parent page. */ - (void)memp_fput(dbp->mpf, h, 0); - (void)__BT_TLPUT(dbp, lock); - local = 0; + if (normal) + goto btd; - goto done; - } + /* + * Copy, delete, update, add-back the parent page's data entry. + * + * XXX + * This may be a performance/logging problem. We should add a + * log message which simply logs/updates a random set of bytes + * on a page, and use it instead of doing a delete/add pair. + */ + indx += O_INDX; + bo = *GET_BOVERFLOW(h, indx); + (void)__db_ditem(dbp, h, indx, BOVERFLOW_SIZE); + bo.pgno = next_pgno; + memset(&dbt, 0, sizeof(dbt)); + dbt.data = &bo; + dbt.size = BOVERFLOW_SIZE; + (void)__db_pitem(dbp, h, indx, BOVERFLOW_SIZE, &dbt, NULL); + (void)memp_fset(dbp->mpf, h, DB_MPOOL_DIRTY); + goto done; } /* Otherwise, do a normal btree delete. */ - if ((ret = __bam_ditem(dbp, h, indx)) != 0) +btd: if ((ret = __bam_ditem(dbp, h, indx)) != 0) goto err; if ((ret = __bam_ditem(dbp, h, indx)) != 0) goto err; @@ -1584,7 +1594,7 @@ __bam_c_physdel(dbp, cp, h) } ret = __bam_dpage(dbp, &dbt); - free(dbt.data); + __db_free(dbt.data); } err: |