Update.

1998-01-26 00:57  Ulrich Drepper  <drepper@cygnus.com>

	* db2/Makefile (routines): Add os_alloc.
	* db2/db.h: Update from db-2.3.16.
	* db2/db_185.h: Likewise.
	* db2/db_int.h: Likewise.
	* db2/btree/bt_close.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/common/db_appinit.c: Likewise.
	* db2/common/db_apprec.c: Likewise.
	* db2/common/db_err.c: Likewise.
	* db2/common/db_region.c: Likewise.
	* db2/common/db_shash.c: Likewise.
	* db2/db/db.c: Likewise.
	* db2/db/db_auto.c: Likewise.
	* db2/db/db_conv.c: Likewise.
	* db2/db/db_dispatch.c: Likewise.
	* db2/db/db_dup.c: Likewise.
	* db2/db/db_pr.c: Likewise.
	* db2/db/db_rec.c: Likewise.
	* db2/db185/db185.c: Likewise.
	* db2/dbm/dbm.c: Likewise.
	* db2/hash/hash.c: 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_ext.h: Likewise.
	* db2/include/clib_ext.h: Likewise.
	* db2/include/common_ext.h: Likewise.
	* db2/include/db.h.src: Likewise.
	* db2/include/db_185.h.src: Likewise.
	* db2/include/db_am.h: Likewise.
	* db2/include/db_ext.h: Likewise.
	* db2/include/db_int.h.src: Likewise.
	* db2/include/hash_ext.h: Likewise.
	* db2/include/lock_ext.h: Likewise.
	* db2/include/log.h: Likewise.
	* db2/include/log_auto.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_ext.h: Likewise.
	* db2/lock/lock.c: Likewise.
	* db2/lock/lock_util.c: Likewise.
	* db2/log/log.c: Likewise.
	* db2/log/log.src: 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_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_pr.c: Likewise.
	* db2/mp/mp_sync.c: Likewise.
	* db2/mutex/mutex.c: Likewise.
	* db2/os/os_alloc.c: Likewise.
	* db2/os/os_config.c: Likewise.
	* db2/os/os_stat.c: Likewise.
	* db2/progs/db_checkpoint/db_checkpoint.c: Likewise.
	* db2/progs/db_deadlock/db_deadlock.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.
	* db2/txn/txn.c: Likewise.

	* elf/dl-close.c (_dl_close): Rename inner variable named map to imap.
	Unmap memory blocks in reverse order of allocation.
	Call munmap with load address added to offset.
	Bug reported by Miguel de Icaza.

	* locale/programs/ld-collate.c (collate_end_weight): Correctly fill
	up weight array.

	* localedata/locales/cs_CZ: Update by Michael Mraka
	<michael@informatics.muni.cz>.

	* misc/sys/syslog.h: Reformat a bit.  Don't declare vsyslog unless
	__USE_BSD.

	* nis/nss_compat/compat-grp.c: Correctly handle buffer overflow while
	reading line with fgets.
	* nis/nss_compat/compat-pwd.c: Likewise.
	* nis/nss_compat/compat-spwd.c: Likewise.
	* nss/nss_files/files-XXX.c: Likewise.
	* nss/nss_files/files-alias.c: Likewise.
	* shadow/fgetspent_r.c: Likewise.

	* string/strerror_r.c: Correct comment.  Patch by Andreas Jaeger.

	* sysdeps/unix/sysv/linux/bits/stat.h: Define _STATBUF_ST_RDEV.
	* sysdeps/unix/sysv/linux/alpha/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/stat.h: Likewise.

	* sysdeps/unix/sysv/linux/i386/sys/ucontext.h: Allocate room for
	FP register content in ucontext_t.

1998-01-22  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/libm-ieee754/s_modfl.c (modf): Correct
	calculation.  Patch by Markus Schoder
	<Markus.Schoder@dresdner-bank.de>.

	* math/libm-test.c (modf_test): Add more tests for modf.

	* sysdeps/unix/sysv/linux/sys/mman.h: Add const to mlock and
	munlock according to Unix98.

1998-01-25  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* nss/nss_files/files-network.c (LINE_PARSER): Set n_addrtype to
	AF_INET.

1998-01-21 07:22  H.J. Lu  <hjl@gnu.org>

	* sysdeps/posix/ttyname.c: Handle symbolic links.
	* sysdeps/posix/ttyname_r.c: Ditto.

1998-01-25 19:39  Ulrich Drepper  <drepper@cygnus.com>

	* db2/makedb.c (process_input): Write terminating \0 for value.
	(print_database): Simply print value string, don't use length.

1998-01-24  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* nss/nsswitch.c (__nss_configure_lookup): Correct test for early
	exit of loop.

1998-01-25  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>

	* nis/ypclnt.c: Don't set dom_client to NULL, or we will not
	close all sockets.

1998-01-25 14:54  Ulrich Drepper  <drepper@cygnus.com>

	* signal/Makefile (routines): Add sighold, sigrelse, sigignore, and
	sigset.
	* signal/sighold.c: New file.
	* signal/sigrelse.c: New file.
	* sysdeps/generic/sigignore.c: New file.
	* sysdeps/generic/sigset.c: New file.
	* sysdeps/posix/sigignore.c: New file.
	* sysdeps/posix/sigset.c: New file.
	* signal/signal.h: Add prototypes for new functions.

	* sysdeps/unix/sysv/linux/alpha/bits/signum.h: Define SIG_HOLD.
	* sysdeps/unix/sysv/linux/bits/signum.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/signum.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/signum.h: Likewise.

1998-01-23 00:16  Tim Waugh  <tim@cyberelk.demon.co.uk>

	* posix/wordexp.c: Added IFS field-splitting in parameter and
	command substitution.  Fixed an IFS-related bug that caused an
	infinite loop.

1998-01-25 12:38  Ulrich Drepper  <drepper@cygnus.com>

	* stdlib/Makefile (routines): Add getcontext, setcontext, makecontext,
	and swapcontext.
	* stdlib/ucontext.h: Correct prototypes.
	* sysdeps/generic/getcontext.c: New file.
	* sysdeps/generic/setcontext.c: New file.
	* sysdeps/generic/makecontext.c: New file.
	* sysdeps/generic/swapcontext.c: New file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/Makefile: Removed.

1998-01-25 04:07  Ulrich Drepper  <drepper@cygnus.com>

	* resource/sys/resource.h: Remove #include of ulimit.h which is
	not allowed by SUSv2 and not available on other systems.
	* sysdeps/unix/sysv/linux/ulimit.c: Include ulimit.h.

	* streams/Makefile: New file.
	* streams/stropts.h: New file.
	* sysdeps/generic/bits/stropts.h: New file.
	* sysdeps/generic/isastream.c: New file.
	* sysdeps/generic/getmsg.c: New file.
	* sysdeps/generic/getpmsg.c: New file.
	* sysdeps/generic/putmsg.c: New file.
	* sysdeps/generic/putpmsg.c: New file.
	* sysdeps/generic/fattach.c: New file.
	* sysdeps/generic/fdetach.c: New file.
	* sysdeps/unix/inet/Subdirs: Add streams.
	* sysdeps/generic/bits/types.h: Add definition of __t_scalar_t and
	__t_uscalar_t.
	* sysdeps/unix/sysv/linux/bits/types.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/types.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/types.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/types.h: Likewise.

	* sysdeps/mach/_strerror.c: Follow changes of generic version to
	handle small buffers correctly.

1998-01-24 17:31  H.J. Lu  <hjl@gnu.org>

	* sysdeps/alpha/dl-machine.h (ELF_MACHINE_RUNTIME_TRAMPOLINE):
	Remove the 3rd arg and add declaration for _dl_runtime_resolve
	and _dl_runtime_profile.

1998-01-25 02:42  Ulrich Drepper  <drepper@cygnus.com>

	* include/cpio.h: New file.  Mainly copied from GNU cpio.
	* posix/Makefile (headers): Add cpio.h.

1 files changed, 89 insertions, 42 deletions

diff --git a/db2/mp/mp_bh.c b/db2/mp/mp_bh.c
index 578abedcb6..c23abdda24 100644
--- a/db2/mp/mp_bh.c
+++ b/db2/mp/mp_bh.c
@@ -7,7 +7,7 @@
 #include "config.h"
 
 #ifndef lint
-static const char sccsid[] = "@(#)mp_bh.c	10.23 (Sleepycat) 11/26/97";
+static const char sccsid[] = "@(#)mp_bh.c	10.28 (Sleepycat) 1/8/98";
 #endif /* not lint */
 
 #ifndef NO_SYSTEM_INCLUDES
@@ -193,30 +193,28 @@ __memp_pgread(dbmfp, bhp, can_create)
 	/* Call any pgin function. */
 pgin:	ret = mfp->ftype == 0 ? 0 : __memp_pg(dbmfp, bhp, 1);
 
-	/* Reacquire the region lock. */
+	/* Unlock the buffer and reacquire the region lock. */
+err:	UNLOCKBUFFER(dbmp, bhp);
 	LOCKREGION(dbmp);
 
-	/* If the pgin function succeeded, the data is now valid. */
-	if (ret == 0)
+	/*
+	 * If no errors occurred, the data is now valid, clear the BH_TRASH
+	 * flag; regardless, clear the lock bit and let other threads proceed.
+	 */
+	F_CLR(bhp, BH_LOCKED);
+	if (ret == 0) {
 		F_CLR(bhp, BH_TRASH);
 
-	/* Update the statistics. */
-	if (can_create) {
-		++dbmp->mp->stat.st_page_create;
-		++mfp->stat.st_page_create;
-	} else {
-		++dbmp->mp->stat.st_page_in;
-		++mfp->stat.st_page_in;
-	}
-
-	if (0) {
-err:		LOCKREGION(dbmp);
+		/* Update the statistics. */
+		if (can_create) {
+			++dbmp->mp->stat.st_page_create;
+			++mfp->stat.st_page_create;
+		} else {
+			++dbmp->mp->stat.st_page_in;
+			++mfp->stat.st_page_in;
+		}
 	}
 
-	/* Release the buffer. */
-	F_CLR(bhp, BH_LOCKED);
-	UNLOCKBUFFER(dbmp, bhp);
-
 	return (ret);
 }
 
@@ -240,7 +238,7 @@ __memp_pgwrite(dbmfp, bhp, restartp, wrotep)
 	MPOOLFILE *mfp;
 	size_t pagesize;
 	ssize_t nw;
-	int callpgin, ret;
+	int callpgin, ret, syncfail;
 	const char *fail;
 
 	dbmp = dbmfp->dbmp;
@@ -255,8 +253,32 @@ __memp_pgwrite(dbmfp, bhp, restartp, wrotep)
 	callpgin = 0;
 	pagesize = mfp->stat.st_pagesize;
 
-	F_SET(bhp, BH_LOCKED);
+	/*
+	 * Check the dirty bit -- this buffer may have been written since we
+	 * decided to write it.
+	 */
+	if (!F_ISSET(bhp, BH_DIRTY)) {
+		if (wrotep != NULL)
+			*wrotep = 1;
+		return (0);
+	}
+
 	LOCKBUFFER(dbmp, bhp);
+
+	/*
+	 * If there were two writers, we may have just been waiting while the
+	 * other writer completed I/O on this buffer.  Check the dirty bit one
+	 * more time.
+	 */
+	if (!F_ISSET(bhp, BH_DIRTY)) {
+		UNLOCKBUFFER(dbmp, bhp);
+
+		if (wrotep != NULL)
+			*wrotep = 1;
+		return (0);
+	}
+
+	F_SET(bhp, BH_LOCKED);
 	UNLOCKREGION(dbmp);
 
 	if (restartp != NULL)
@@ -272,8 +294,9 @@ __memp_pgwrite(dbmfp, bhp, restartp, wrotep)
 		goto err;
 
 	/*
-	 * Call any pgout function.  We set the callpgin flag so that on
-	 * error we flag that the contents of the buffer may be trash.
+	 * Call any pgout function.  We set the callpgin flag so that we flag
+	 * that the contents of the buffer will need to be passed through pgin
+	 * before they are reused.
 	 */
 	if (mfp->ftype == 0)
 		ret = 0;
@@ -307,7 +330,7 @@ __memp_pgwrite(dbmfp, bhp, restartp, wrotep)
 		 * between the failing clauses to __db_lseek and __db_write and
 		 * this ret != 0.
 		 */
-		fail = NULL;
+		COMPQUIET(fail, NULL);
 		goto syserr;
 	}
 
@@ -320,18 +343,20 @@ __memp_pgwrite(dbmfp, bhp, restartp, wrotep)
 	if (wrotep != NULL)
 		*wrotep = 1;
 
-	/* Reacquire the region lock. */
+	/* Unlock the buffer and reacquire the region lock. */
+	UNLOCKBUFFER(dbmp, bhp);
 	LOCKREGION(dbmp);
 
-	/* Clean up the flags based on a successful write. */
-	F_SET(bhp, BH_CALLPGIN);
+	/*
+	 * Clean up the flags based on a successful write.
+	 *
+	 * If we rewrote the page, it will need processing by the pgin
+	 * routine before reuse.
+	 */
+	if (callpgin)
+		F_SET(bhp, BH_CALLPGIN);
 	F_CLR(bhp, BH_DIRTY | BH_LOCKED);
 
-	++mp->stat.st_page_clean;
-	--mp->stat.st_page_dirty;
-
-	UNLOCKBUFFER(dbmp, bhp);
-
 	/*
 	 * If we write a buffer for which a checkpoint is waiting, update
 	 * the count of pending buffers (both in the mpool as a whole and
@@ -344,23 +369,36 @@ __memp_pgwrite(dbmfp, bhp, restartp, wrotep)
 	 *
 	 * XXX:
 	 * We ignore errors from the sync -- it makes no sense to return an
-	 * error to the calling process, so set a flag causing the sync to
-	 * be retried later.
-	 *
-	 * If the buffer we wrote has a LSN larger than the current largest
-	 * we've written for this checkpoint, update the saved value.
+	 * error to the calling process, so set a flag causing the checkpoint
+	 * to be retried later.
 	 */
 	if (F_ISSET(bhp, BH_WRITE)) {
+		if (mfp->lsn_cnt == 1) {
+			UNLOCKREGION(dbmp);
+			syncfail = __db_fsync(dbmfp->fd) != 0;
+			LOCKREGION(dbmp);
+			if (syncfail)
+				F_SET(mp, MP_LSN_RETRY);
+
+		}
+
+		F_CLR(bhp, BH_WRITE);
+
+		/*
+		 * If the buffer just written has a larger LSN than the current
+		 * max LSN written for this checkpoint, update the saved value.
+		 */
 		if (log_compare(&lsn, &mp->lsn) > 0)
 			mp->lsn = lsn;
-		F_CLR(bhp, BH_WRITE);
 
 		--mp->lsn_cnt;
-
-		if (--mfp->lsn_cnt == 0 && __db_fsync(dbmfp->fd) != 0)
-			F_SET(mp, MP_LSN_RETRY);
+		--mfp->lsn_cnt;
 	}
 
+	/* Update the page clean/dirty statistics. */
+	++mp->stat.st_page_clean;
+	--mp->stat.st_page_dirty;
+
 	/* Update I/O statistics. */
 	++mp->stat.st_page_out;
 	++mfp->stat.st_page_out;
@@ -370,11 +408,20 @@ __memp_pgwrite(dbmfp, bhp, restartp, wrotep)
 syserr:	__db_err(dbenv, "%s: %s failed for page %lu",
 	    __memp_fn(dbmfp), fail, (u_long)bhp->pgno);
 
-err:	UNLOCKBUFFER(dbmp, bhp);
+err:	/* Unlock the buffer and reacquire the region lock. */
+	UNLOCKBUFFER(dbmp, bhp);
 	LOCKREGION(dbmp);
+
+	/*
+	 * Clean up the flags based on a failure.
+	 *
+	 * The page remains dirty but we remove our lock.  If we rewrote the
+	 * page, it will need processing by the pgin routine before reuse.
+	 */
 	if (callpgin)
 		F_SET(bhp, BH_CALLPGIN);
 	F_CLR(bhp, BH_LOCKED);
+
 	return (ret);
 }