Update. cvs/libc-ud-971201

1997-12-01 17:27  Ulrich Drepper  <drepper@cygnus.com>

	* Makefile (subdirs): Add iconvdata and localedata.

	* iconv/gconv.h: Define UNKNOWN_10646_CHAR as error value.

	* iconv/gconv_conf.c (read_conf_file): Little optimization.

	* iconvdata/8bit-gap.c: New file.
	* iconvdata/8bit-generic.c: Renamed from ...
	* iconvdata/iso8859-generic.c: ...this.
	* iconvdata/configure: Removed.
	* iconvdata/Makefile: Add new modules and better rules.
	* iconvdata/iso6937.c: Minor bug fixes.
	* iconvdata/iso8859-1.c: Likewise.
	* iconvdata/t61.c: Likewise.
	* iconvdata/iso8859-2.c: Change to use 8bit-generic.c.
	Minor bug fixes.
	* iconvdata/iso8859-3.c: Likewise.
	* iconvdata/iso8859-4.c: Likewise.
	* iconvdata/iso8859-5.c: Likewise.
	* iconvdata/iso8859-6.c: Likewise.
	* iconvdata/iso8859-7.c: Likewise.
	* iconvdata/iso8859-8.c: Likewise.
	* iconvdata/iso8859-9.c: Likewise.
	* iconvdata/iso8859-10.c: Likewise.
	* iconvdata/ebcdic-at-de-a.c: New file.
	* iconvdata/ebcdic-at-de.c: New file.
	* iconvdata/ebcdic-ca-fr.c: New file.
	* iconvdata/hp-roman8.c: New file.
	* iconvdata/koi-8.c: New file.
	* iconvdata/koi8-r.c: New file.
	* iconvdata/koi8-h.c: New file.
	* iconvdata/latin-greek-1.c: New file.
	* iconvdata/latin-greek-1.h: New file.
	* iconvdata/latin-greek.c: New file.
	* iconvdata/latin-greek.h: New file.
	* iconvdata/jis0201.c: New file.
	* iconvdata/jis0201.h: New file.
	* iconvdata/jis0208.c: New file.
	* iconvdata/jis0208.h: New file.
	* iconvdata/jis0212.c: New file.
	* iconvdata/jis0212.h: New file.
	* iconvdata/sjis.c: New file.
	* iconvdata/gap.pl: New file.  Script to generate table header.
	* iconvdata/gaptab.pl: New file.
	* iconvdata/gconv-modules: Add info about new modules.

	* locale/programs/charmap.c: Also examine alias names given in charmap
	files.

	* localedata/*: Add to here from add-on.  We need the information
	to generate tables for iconv.

	Update from db-2.3.14.
	* db2/Makefile: Updated.
	* db2/config.h: Likewise.
	* db2/db.h: Likewise.
	* db2/db_int.h: Likewise.
	* db2/btree/bt_cursor.c: Likewise.
	* db2/btree/bt_delete.c: Likewise.
	* db2/btree/bt_put.c: Likewise.
	* db2/btree/bt_search.c: Likewise.
	* db2/btree/bt_split.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/db/db_auto.c: Likewise.
	* db2/db/db_dispatch.c: Likewise.
	* db2/db/db_ret.c: Likewise.
	* db2/dbm/dbm.c: Likewise.
	* db2/hash/hash_auto.c: Likewise.
	* db2/include/btree_ext.h: Likewise.
	* db2/include/common_ext.h: Likewise.
	* db2/include/db.h.src: Likewise.
	* db2/include/db_cxx.h: Likewise.
	* db2/include/db_ext.h: Likewise.
	* db2/include/db_int.h.src: Likewise.
	* db2/include/lock.h: Likewise.
	* db2/include/log.h: Likewise.
	* db2/include/mp.h: Likewise.
	* db2/include/mp_ext.h: Likewise.
	* db2/include/os_ext.h: Likewise.
	* db2/include/os_func.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/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/README: Likewise.
	* db2/mutex/mutex.c: Likewise.
	* db2/os/os_open.c: Likewise.
	* db2/os/os_func.c: Removed.
	* db2/os/os_config.c: New file.
	* db2/os/os_spin.c: New file.
	* db2/txn/txn.c: Likewise.
	* db2/txn/txn_auto.c: Likewise.

1997-11-30 06:01  Ulrich Drepper  <drepper@cygnus.com>

	* posix/sys/wait.h (__WAIT_INT): Don't use complex version with
	__typeof for C++ since this fails for class members.
	Reported by Neal Becker <neal@ctd.comsat.com>.

1997-11-28 11:21  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* configure.in: Check for a working makeinfo (3.11 or better).
	* config.make.in: Add MAKEINFO to be substituted.
	* manual/Makefile: Don't update info if makeinfo is too old.

1997-11-30 05:21  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/alpha/setjmp.S: Define _ASM and _SETJMP_H to get definitions.
	* sysdeps/alpha/__longjmp.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/kernel_termios.h: Include <termios.h>
	not <bits/termios.h>.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list: Define syscall as
	__llseek and make llseek and lseek64 weak aliases.
	* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
	Patches by a sun <asun@zoology.washington.edu>.

1997-11-29 19:19  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* misc/sys/syslog.h: Delete KERNEL preprocessor conditional.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.
	* misc/sys/syslog.h: Clean up BSD header.

1997-11-29  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/unix/sysv/linux/bits/in.h: Add changes from Linux 2.1.67.

	* sysdeps/libm-ieee754/s_ctan.c (__ctan): Raise invalid exception
	for ctan(+-inf,x).
	* sysdeps/libm-ieee754/s_ctanl.c (__ctanl): Likewise.
	* sysdeps/libm-ieee754/s_ctanf.c (__ctanf): Likewise.

	* math/libm-test.c (csqrt_test): Add tests for cabs, carg, ctan,
	csqrt (-1), ctanh(i*pi/4).

1997-11-26  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/generic/bits/confname.h: Fix comma in enumerator.

1997-11-28 13:28  Philip Blundell  <Philip.Blundell@pobox.com>

	* sysdeps/unix/sysv/linux/net/if_arp.h: Add more ARPHRD_ constants.

1997-11-26  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* wcsmbs/wcrtomb.c (__wcrtomb): Remove unused variable fake.

1997-11-26 21:28  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/posix/getcwd.c (GETCWD_STORYGE_CLASS): Remove definition
	and use.  Define GETCWD_RETURN_TYPE instead and use it.
	* sysdeps/unix/sysv/linux/getcwd.c: Define GETCWD_RETURN_TYPE instead
	of GETCWD_STORYGE_CLASS and put the return type and the
	`internal_function' in the right order for gcc 2.7.2.

1997-11-26  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/unix/sysv/linux/sys/module.h: Remove file.  It's
	incompatible with Linux 2.1.x.  Packages using modules
	(e.g. modutils) should/do provide their own version.  Suggested by
	Richard Henderson.

	* sysdeps/unix/sysv/linux/Dist: Remove sys/module.h.

	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers)
	[$(subdir)=socket]: Remove sys/module.h.

	* libio/stdio.h: Correct comment of sys_nerr/sys_errlist.

1 files changed, 58 insertions, 32 deletions

diff --git a/db2/lock/lock.c b/db2/lock/lock.c
index f1223a9fa6..9b1cbc8a08 100644
--- a/db2/lock/lock.c
+++ b/db2/lock/lock.c
@@ -8,7 +8,7 @@
 #include "config.h"
 
 #ifndef lint
-static const char sccsid[] = "@(#)lock.c	10.38 (Sleepycat) 10/25/97";
+static const char sccsid[] = "@(#)lock.c	10.41 (Sleepycat) 11/28/97";
 #endif /* not lint */
 
 #ifndef NO_SYSTEM_INCLUDES
@@ -91,7 +91,7 @@ __lock_create(path, mode, dbenv)
 	if ((ret =
 	    __db_rcreate(dbenv, DB_APP_NONE, path, DB_DEFAULT_LOCK_FILE, mode,
 	    LOCK_REGION_SIZE(lock_modes, maxlocks, __db_tablesize(maxlocks)),
-	    &fd, &lrp)) != 0)
+	    0, &fd, &lrp)) != 0)
 		return (ret);
 
 	/* Region exists; now initialize it. */
@@ -600,7 +600,9 @@ __lock_put_internal(lt, lockp, do_all)
 	if (SH_TAILQ_FIRST(&sh_obj->holders, __db_lock) == NULL) {
 		HASHREMOVE_EL(lt->hashtab, __db_lockobj,
 		    links, sh_obj, lt->region->table_size, __lock_lhash);
-		__db_shalloc_free(lt->mem, SH_DBT_PTR(&sh_obj->lockobj));
+		if (sh_obj->lockobj.size > sizeof(sh_obj->objdata))
+			__db_shalloc_free(lt->mem,
+			    SH_DBT_PTR(&sh_obj->lockobj));
 		SH_TAILQ_INSERT_HEAD(&lt->region->free_objs, sh_obj, links,
 		    __db_lockobj);
 		state_changed = 1;
@@ -633,7 +635,7 @@ __lock_get_internal(lt, locker, flags, obj, lock_mode, lockp)
 	DB_LOCKOBJ *sh_obj, *sh_locker;
 	DB_LOCKREGION *lrp;
 	size_t newl_off;
-	int ret;
+	int ihold, ret;
 
 	ret = 0;
 	/*
@@ -680,29 +682,40 @@ __lock_get_internal(lt, locker, flags, obj, lock_mode, lockp)
 	 * new lock if it does not conflict with anyone on the holders list
 	 * OR anyone on the waiters list.  The reason that we don't grant if
 	 * there's a conflict is that this can lead to starvation (a writer
-	 * waiting on a popularly read item will never ben granted).  The
+	 * waiting on a popularly read item will never be granted).  The
 	 * downside of this is that a waiting reader can prevent an upgrade
-	 * from reader to writer, which is not uncommon.  In case of conflict,
-	 * we put the new lock on the end of the waiters list.
+	 * from reader to writer, which is not uncommon.
+	 *
+	 * There is one exception to the no-conflict rule.  If a lock is held
+	 * by the requesting locker AND the new lock does not conflict with
+	 * any other holders, then we grant the lock.  The most common place
+	 * this happens is when the holder has a WRITE lock and a READ lock
+	 * request comes in for the same locker.  If we do not grant the read
+	 * lock, then we guarantee deadlock.
+	 *
+	 * In case of conflict, we put the new lock on the end of the waiters
+	 * list.
 	 */
+	ihold = 0;
 	for (lp = SH_TAILQ_FIRST(&sh_obj->holders, __db_lock);
 	    lp != NULL;
 	    lp = SH_TAILQ_NEXT(lp, links, __db_lock)) {
-		if (CONFLICTS(lt, lp->mode, lock_mode) &&
-		    locker != lp->holder)
+		if (locker == lp->holder) {
+			if (lp->mode == lock_mode &&
+			    lp->status == DB_LSTAT_HELD) {
+				/* Lock is held, just inc the ref count. */
+				lp->refcount++;
+				SH_TAILQ_INSERT_HEAD(&lrp->free_locks,
+				    newl, links, __db_lock);
+				*lockp = lp;
+				return (0);
+			} else
+				ihold = 1;
+		} else if (CONFLICTS(lt, lp->mode, lock_mode))
 			break;
-		else if (lp->holder == locker && lp->mode == lock_mode &&
-		    lp->status == DB_LSTAT_HELD) {
-			/* Lock is already held, just inc the ref count. */
-			lp->refcount++;
-			SH_TAILQ_INSERT_HEAD(&lrp->free_locks, newl, links,
-			    __db_lock);
-			*lockp = lp;
-			return (0);
-		}
     	}
 
-	if (lp == NULL)
+	if (lp == NULL && !ihold)
 		for (lp = SH_TAILQ_FIRST(&sh_obj->waiters, __db_lock);
 		    lp != NULL;
 		    lp = SH_TAILQ_NEXT(lp, links, __db_lock)) {
@@ -1261,25 +1274,37 @@ __lock_getobj(lt, locker, dbt, type, objp)
 	 */
 	if (sh_obj == NULL) {
 		/* Create new object and then insert it into hash table. */
-		if ((sh_obj = SH_TAILQ_FIRST(&lrp->free_objs, __db_lockobj))
-		    == NULL) {
+		if ((sh_obj =
+		    SH_TAILQ_FIRST(&lrp->free_objs, __db_lockobj)) == NULL) {
 			if ((ret = __lock_grow_region(lt, DB_LOCK_OBJ, 0)) != 0)
 				return (ret);
 			lrp = lt->region;
 			sh_obj = SH_TAILQ_FIRST(&lrp->free_objs, __db_lockobj);
 		}
-		if ((ret = __db_shalloc(lt->mem, obj_size, 0, &p)) != 0) {
-			if ((ret = __lock_grow_region(lt,
-			    DB_LOCK_MEM, obj_size)) != 0)
-				return (ret);
-			lrp = lt->region;
-			/* Reacquire the head of the list. */
-			sh_obj = SH_TAILQ_FIRST(&lrp->free_objs, __db_lockobj);
-			(void)__db_shalloc(lt->mem, obj_size, 0, &p);
-		}
-		sh_obj->type = type;
+
+		/*
+		 * If we can fit this object in the structure, do so instead
+		 * of shalloc-ing space for it.
+		 */
+		if (obj_size <= sizeof(sh_obj->objdata))
+			p = sh_obj->objdata;
+		else
+			if ((ret =
+			    __db_shalloc(lt->mem, obj_size, 0, &p)) != 0) {
+				if ((ret = __lock_grow_region(lt,
+				    DB_LOCK_MEM, obj_size)) != 0)
+					return (ret);
+				lrp = lt->region;
+				/* Reacquire the head of the list. */
+				sh_obj = SH_TAILQ_FIRST(&lrp->free_objs,
+				    __db_lockobj);
+				(void)__db_shalloc(lt->mem, obj_size, 0, &p);
+			}
+
 		src = type == DB_LOCK_OBJTYPE ? dbt->data : (void *)&locker;
 		memcpy(p, src, obj_size);
+
+		sh_obj->type = type;
 		SH_TAILQ_REMOVE(&lrp->free_objs, sh_obj, links, __db_lockobj);
 
 		SH_TAILQ_INIT(&sh_obj->waiters);
@@ -1329,7 +1354,8 @@ __lock_freeobj(lt, obj)
 {
 	HASHREMOVE_EL(lt->hashtab,
 	    __db_lockobj, links, obj, lt->region->table_size, __lock_lhash);
-	__db_shalloc_free(lt->mem, SH_DBT_PTR(&obj->lockobj));
+	if (obj->lockobj.size > sizeof(obj->objdata))
+		__db_shalloc_free(lt->mem, SH_DBT_PTR(&obj->lockobj));
 	SH_TAILQ_INSERT_HEAD(&lt->region->free_objs, obj, links, __db_lockobj);
 }