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authorUlrich Drepper <drepper@redhat.com>1997-09-30 17:10:40 +0000
committerUlrich Drepper <drepper@redhat.com>1997-09-30 17:10:40 +0000
commita5a0310d8e9d7176bb17e91c916272006a871016 (patch)
treeb922b764878596e6ee42ae84cc315ecaaac00505 /db2/btree/bt_cursor.c
parenta2b08ee54130cf3a74655856e6ca6c29874a9df2 (diff)
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1997-09-30 18:03  Ulrich Drepper  <drepper@cygnus.com>

	* Makerules: Undo last change.
	* csu/Makefile: Define before-compile at the right place.

	* aclocal.m4: Remove a.out file created by assembler test.

	* set-init.c: Find set-hooks.h using <...>.

	Update to db 2.3.10.
	* db2/Makefile: Update.
	* db2/db.h: Likewise.
	* db2/db_185.h: Likewise.
	* db2/db_int.h: Likewise.
	* db2/btree/bt_close.c: Likewise.
	* db2/btree/bt_conv.c: Likewise.
	* db2/btree/bt_cursor.c: Likewise.
	* db2/btree/bt_put.c: Likewise.
	* db2/btree/bt_rec.c: Likewise.
	* db2/btree/bt_recno.c: Likewise.
	* db2/btree/btree.src: Likewise.
	* db2/btree/btree_auto.c: Likewise.
	* db2/clib/getlong.c: Likewise.
	* db2/db/db.c: Likewise.
	* db2/db/db_auto.c: Likewise.
	* db2/db/db_conv.c: Likewise.
	* db2/db/db_pr.c: Likewise.
	* db2/db/db_ret.c: Likewise.
	* db2/db/db_thread.c: Likewise.
	* db2/hash/hash.c: Likewise.
	* db2/hash/hash_auto.c: Likewise.
	* db2/hash/hash_conv.c: Likewise.
	* db2/hash/hash_dup.c: Likewise.
	* db2/hash/hash_func.c: Likewise.
	* db2/hash/hash_page.c: Likewise.
	* db2/hash/hash_rec.c: Likewise.
	* db2/include/btree.h: Likewise.
	* db2/include/btree_ext.h: Likewise.
	* db2/include/db.h.src: Likewise.
	* db2/include/db_185.h.src: Likewise.
	* db2/include/db_cxx.h: Likewise.
	* db2/include/db_ext.h: Likewise.
	* db2/include/db_int.h.src: Likewise.
	* db2/include/db_page.h: Likewise.
	* db2/include/db_shash.h: Likewise.
	* db2/include/lock.h: Likewise.
	* db2/include/log.h: Likewise.
	* db2/include/log_ext.h: Likewise.
	* db2/include/mp.h: Likewise.
	* db2/include/shqueue.h: Likewise.
	* db2/include/txn.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_get.c: Likewise.
	* db2/log/log_put.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/mutex/mutex.c: Likewise.
	* db2/os/db_os_dir.c: Likewise.
	* db2/progs/db_checkpoint/db_checkpoint.c: Likewise.
	* db2/progs/db_deadlock/db_deadlock.c: Likewise.
	* db2/progs/db_dump185/db_dump185.c: Likewise.
	* db2/progs/db_load/db_load.c: Likewise.
	* db2/progs/db_recover/db_recover.c: Likewise.
	* db2/txn/txn.c: Likewise.
	* db2/txn/txn_auto.c: Likewise.

	* elf/link.h: Define struct libname_list outside struct link_map
	to not confuse C++ compilers.

	* include/features.h: Recognize _XOPEN_SOURCE == 500 and set
	__USE_UNIX98.
	* manual/creature.texi: Explain this.

	* libc.map: Add new functions.

	* libio/Makefile (routines): Add fseeko and ftello.
	* libio/ftello.c: New file.
	* libio/fseeko.c: New file.
	* libio/stdio.h: Add prototypes for new functions.
	* manual/stdio.texi: Document fseeko and ftello.

	* posix/Makefile (routines): Add pread and pwrite.
	* sysdeps/posix/pread.c: New file.
	* sysdeps/posix/pwrite.c: New file.
	* sysdeps/stub/pread.c: New file.
	* sysdeps/stub/pwrite.c: New file.
	* posix/unistd.h: Add prototypes for pread and pwrite.
	Pretty print header.
	Define gid_t, uid_t, off_t, pid_t if __USE_UNIX98.
	Declare ctermid and cuserid if __USE_UNIX98.
	(swab): Change to take void * arguments.
	* string/swab.c: Change parameter to void *.
	* posix/sys/types: Define gid_t, uid_t, off_t, pid_t only if not
	already happened.
	* manual/llio.texi: Document pread and pwrite.

	* string/strings.h: Don't simply include string.h.  Define BSD
	functions according to Unix98.
	* stdlib/tst-strtol.c: Include <string.h> not <strings.h>.
	* sunrpc/clnt_simp.c: Likewise.

	* malloc/Makefile (aux): Add set-freeres.
	* malloc/mtrace.c: Define function release_libc_mem which calls the
	__libc_subfreeres handler.
	(mtrace): Register release_libc_mem.
	* malloc/set-freeres.c: New file.

	* intl/dcgettext.c: Define free_mem function and add to
	__libc_subfreeres list.
	* intl/finddomain.c: Likewise.
	* intl/gettextP.h (struct loaded_domain): Add new fields use_mmap
	and mmap_size.  Add prototype for _nl_unloaded_domain.
	* intl/loadmsgcat.c: Define new function _nl_unload_domain.
	(_nl_load_domain): Store informaiton about mmap use and file size.
	* intl/localealias.c (read_alias_file): Optimize locale alias file
	reading by avoid frequen mallocs.
	Define free_mem function and add to __libc_subfreeres list.

	* locale/localeinfo.h: Make a difference between MAX_USAGE_COUNT and
	undeletable.
	Add prototype for _nl_unload_locale.
	* locale/C-collate: Mark data as undeletable by using UNDELETABLE.
	* locale/C-ctype: Likewise.
	* locale/C-messages: Likewise.
	* locale/C-monetary: Likewise.
	* locale/C-numeric: Likewise.
	* locale/C-time: Likewise.
	* locale/findlocale.c (_nl_find_locale, _nl_remove_locale): Handle
	MAX_USAGE_COUNT and UNDELETABLE.
	(free_mem): New function.  Add it to __libc_subfreeres list.
	* locale/loadlocale.c: Define _nl_unload_locale function.

	* misc/hsearch.c: Register hdestroy in __libc_subfreeres list.

	* stdlib/fmtmsg.c (addseverity): Handle illegal severity arguments
	correctly
	Define free_mem function and add to __libc_subfreeres list.

	* locale/programs/localedef.c (options): short form os verbose is v.
	Reported by Andreas Jaeger.

	* misc/sys/select.h: Define pselect only is __USE_POSIX since this
	header is used in some others as well for historical reasons.

	* resolv/resolv.h: Include <netinet/in.h> to make self-contained.

	* string/bits/string2.h: Add missing braces and optimize strcmp a
	bit more.
	* sysdeps/i386/i486/bits/string.h: Likewise.

	* sunrpc/rpc/auth_des.h: Include rpc/auth.h to be self-contained.
	Pretty print.

	* sysdeps/mach/hurd/cthreads.c: Add copyright text.

	* sysdeps/unix/sysv/linux/syscalls.list: Correct prctl entry.

	* sysdeps/unix/sysv/linux/sys/mman.h: Get definition of size_t.

	* time/time.h: Pretty print.

1997-09-29  Paul Eggert  <eggert@twinsun.com>

	* time/strftime.c: Synchronize with GNU Emacs strftime.c.
	(HAVE_MEMCPY): Define if emacs is defined and HAVE_BCOPY isn't.
	(gmtime_r, localtime_r): Undef before defining.
	(iso_week_days): Use __inline__, not inline.

1997-09-27  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/m68k/fpu/bits/mathinline.h: Rename exp2{,l,f} to
	__ieee754_exp2{,l,f}.
	* sysdeps/m68k/fpu/s_exp2.c: Likewise.
	* sysdeps/m68k/fpu/s_exp2l.c: Likewise.
	* sysdeps/m68k/fpu/s_exp2f.c: Likewise.

1997-09-27  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* elf/soinit.c (__EH_FRAME_BEGIN__): Don't make the .eh_frame
	section read-only, it contains relocations.
	* elf/sofini.c (__FRAME_END__): Likewise.

1997-09-29 03:08  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/i486/bits/string.h [__PIC__] (__strspn_cg, __strcspn_cg,
	__strpbrk_cg, __strstr_cg): Optimize even more.  No spill register
	needed.  Patch by NIIBE Yutaka <gniibe@mri.co.jp>.

1997-09-28 08:27  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>

	* nis/nis_call.c (__do_niscall2): Fix return code, add missing
	  break in switch case.

	* nis/nis_mkdir.c: Fix return codes to match Solaris version.
	* nis/nis_rmdir.c: Likewise.

	* nis/rpcsvc/yp_prot.h: Rename struct keydat to struct keydat_t
	for C++.

1997-09-28 04:32  Ulrich Drepper  <drepper@cygnus.com>

	* configure.in: Fix typo.
	Patch by Zack Weinberg <zack@rabi.phys.columbia.edu>.

1997-09-25 20:14  Philip Blundell  <Philip.Blundell@pobox.com>

	* sysdeps/unix/sysv/linux/scsi/sg.h: New file.
	* sysdeps/unix/sysv/linux/Makefile: Install <scsi/sg.h>.
Diffstat (limited to 'db2/btree/bt_cursor.c')
-rw-r--r--db2/btree/bt_cursor.c76
1 files changed, 49 insertions, 27 deletions
diff --git a/db2/btree/bt_cursor.c b/db2/btree/bt_cursor.c
index efae556030..a1266bcd3c 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	10.27 (Sleepycat) 9/3/97";
+static const char sccsid[] = "@(#)bt_cursor.c	10.33 (Sleepycat) 9/24/97";
 #endif /* not lint */
 
 #ifndef NO_SYSTEM_INCLUDES
@@ -81,7 +81,10 @@ __bam_cursor(dbp, txn, dbcp)
 	dbc->c_get = __bam_c_get;
 	dbc->c_put = __bam_c_put;
 
-	/* All cursor structures hang off the main DB structure. */
+	/*
+	 * All cursors are queued from the master DB structure.  Add the
+	 * cursor to that queue.
+	 */
 	DB_THREAD_LOCK(dbp);
 	TAILQ_INSERT_HEAD(&dbp->curs_queue, dbc, links);
 	DB_THREAD_UNLOCK(dbp);
@@ -99,31 +102,53 @@ __bam_c_close(dbc)
 	DBC *dbc;
 {
 	DB *dbp;
-	CURSOR *cp;
 	int ret;
 
 	DEBUG_LWRITE(dbc->dbp, dbc->txn, "bam_c_close", NULL, NULL, 0);
 
 	GETHANDLE(dbc->dbp, dbc->txn, &dbp, ret);
+
+	ret = __bam_c_iclose(dbp, dbc);
+
+	PUTHANDLE(dbp);
+	return (ret);
+}
+
+/*
+ * __bam_c_iclose --
+ *	Close a single cursor -- internal version.
+ *
+ * PUBLIC: int __bam_c_iclose __P((DB *, DBC *));
+ */
+int
+__bam_c_iclose(dbp, dbc)
+	DB *dbp;
+	DBC *dbc;
+{
+	CURSOR *cp;
+	int ret;
+
 	cp = dbc->internal;
 
-	/* If a cursor key was deleted do the actual deletion.  */
-	ret = F_ISSET(cp, C_DELETED) ?  __bam_c_physdel(dbp, cp, NULL) : 0;
+	/* If a cursor key was deleted, perform the actual deletion.  */
+	ret = F_ISSET(cp, C_DELETED) ? __bam_c_physdel(dbp, cp, NULL) : 0;
 
 	/* Discard any lock if we're not inside a transaction. */
-	if (dbp->txn == NULL && cp->lock != LOCK_INVALID)
+	if (cp->lock != LOCK_INVALID)
 		(void)__BT_TLPUT(dbp, cp->lock);
 
-	/* Remove the cursor from the queue. */
-	DB_THREAD_LOCK(dbp);
-	TAILQ_REMOVE(&dbp->curs_queue, dbc, links);
-	DB_THREAD_UNLOCK(dbp);
+	/*
+	 * All cursors are queued from the master DB structure.  Remove the
+	 * cursor from that queue.
+	 */
+	DB_THREAD_LOCK(dbc->dbp);
+	TAILQ_REMOVE(&dbc->dbp->curs_queue, dbc, links);
+	DB_THREAD_UNLOCK(dbc->dbp);
 
 	/* Discard the structures. */
-	FREE(cp, sizeof(CURSOR));
+	FREE(dbc->internal, sizeof(CURSOR));
 	FREE(dbc, sizeof(DBC));
 
-	PUTHANDLE(dbp);
 	return (ret);
 }
 
@@ -235,27 +260,22 @@ __bam_get(argdbp, txn, key, data, flags)
 	if ((ret = __db_getchk(argdbp, key, data, flags)) != 0)
 		return (ret);
 
-	/* Build a cursor. */
+	/* Build an internal cursor. */
 	memset(&cp, 0, sizeof(cp));
 	cp.dbc = &dbc;
 	cp.pgno = cp.dpgno = PGNO_INVALID;
 	cp.lock = LOCK_INVALID;
+	cp.flags = C_INTERNAL;
 
+	/* Build an external cursor. */
 	memset(&dbc, 0, sizeof(dbc));
 	dbc.dbp = argdbp;
 	dbc.txn = txn;
 	dbc.internal = &cp;
 
 	/* Get the key. */
-	if ((ret = __bam_c_get(&dbc,
-	    key, data, LF_ISSET(DB_SET_RECNO) ? DB_SET_RECNO : DB_SET)) != 0)
-		return (ret);
-
-	/* Discard any lock, the cursor didn't really exist. */
-	if (cp.lock != LOCK_INVALID)
-		(void)__BT_TLPUT(argdbp, cp.lock);
-
-	return (0);
+	return(__bam_c_get(&dbc,
+	    key, data, LF_ISSET(DB_SET_RECNO) ? DB_SET_RECNO : DB_SET));
 }
 
 /*
@@ -275,8 +295,7 @@ __bam_c_get(dbc, key, data, flags)
 	int exact, ret;
 
 	DEBUG_LREAD(dbc->dbp, dbc->txn, "bam_c_get",
-	    flags == DB_SET || flags == DB_SET_RANGE ? key : NULL,
-	    NULL, flags);
+	    flags == DB_SET || flags == DB_SET_RANGE ? key : NULL, NULL, flags);
 
 	cp = dbc->internal;
 
@@ -399,6 +418,10 @@ __bam_c_get(dbc, key, data, flags)
 	/* Release the pinned page. */
 	ret = memp_fput(dbp->mpf, cp->page, 0);
 
+	/* Internal cursors don't hold locks. */
+	if (F_ISSET(cp, C_INTERNAL) && cp->lock != LOCK_INVALID)
+		(void)__BT_TLPUT(dbp, cp->lock);
+
 	++t->lstat.bt_get;
 
 	if (0) {
@@ -864,7 +887,7 @@ __bam_c_prev(dbp, cp)
 	 * If at the beginning of the page, move to any previous one.
 	 *
 	 * !!!
-         * This code handles empty pages and pages with only deleted entries.
+	 * This code handles empty pages and pages with only deleted entries.
 	 */
 	for (;;) {
 		if (indx == 0) {
@@ -1472,8 +1495,7 @@ __bam_c_physdel(dbp, cp, h)
 		 *	empty the current page of duplicates, we don't need to
 		 *	touch the parent page.
 		 */
-		if (PREV_PGNO(h) != PGNO_INVALID ||
-		    (h != NULL && pgno == h->pgno))
+		if (prev_pgno != PGNO_INVALID || (h != NULL && pgno == h->pgno))
 			goto done;
 
 		/*