From: Timothy Hockin <th122948@scl2.sfbay.sun.com>
To: torvalds@transmeta.com, linux-kernel@vger.kernel.org
Subject: [BK PATCH 1/4] fix NGROUPS hard limit
Date: Thu, 10 Oct 2002 18:33:46 -0700 (PDT) [thread overview]
Message-ID: <200210110133.g9B1Xke18414@scl2.sfbay.sun.com> (raw)
# This is a BitKeeper generated patch for the following project:
# Project Name: Linux kernel tree
# This patch format is intended for GNU patch command version 2.5 or higher.
# This patch includes the following deltas:
# ChangeSet 1.738 -> 1.739
# include/linux/kernel.h 1.23 -> 1.24
# lib/Makefile 1.13 -> 1.14
# (new) -> 1.1 lib/bsearch.c
# (new) -> 1.1 lib/qsort.c
#
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 02/10/10 thockin@freakshow.cobalt.com 1.739
# Add generic qsort() and bsearch(): qsort() from BSD, bsearch() from glibc
# --------------------------------------------
#
diff -Nru a/include/linux/kernel.h b/include/linux/kernel.h
--- a/include/linux/kernel.h Thu Oct 10 18:19:54 2002
+++ b/include/linux/kernel.h Thu Oct 10 18:19:54 2002
@@ -209,4 +209,9 @@
#define __FUNCTION__ (__func__)
#endif
+void qsort(void *base, size_t nmemb, size_t size,
+ int (*compar)(const void *, const void *));
+void *bsearch(const void *key, const void *base, size_t nmemb, size_t size,
+ int (*compar)(const void *, const void *));
+
#endif
diff -Nru a/lib/Makefile b/lib/Makefile
--- a/lib/Makefile Thu Oct 10 18:19:54 2002
+++ b/lib/Makefile Thu Oct 10 18:19:54 2002
@@ -9,10 +9,11 @@
L_TARGET := lib.a
export-objs := cmdline.o dec_and_lock.o rwsem-spinlock.o rwsem.o \
- crc32.o rbtree.o radix-tree.o
+ crc32.o rbtree.o radix-tree.o qsort.o bsearch.o
obj-y := errno.o ctype.o string.o vsprintf.o brlock.o cmdline.o \
- bust_spinlocks.o rbtree.o radix-tree.o dump_stack.o
+ bust_spinlocks.o rbtree.o radix-tree.o dump_stack.o \
+ qsort.o bsearch.o
obj-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
diff -Nru a/lib/bsearch.c b/lib/bsearch.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/lib/bsearch.c Thu Oct 10 18:19:54 2002
@@ -0,0 +1,49 @@
+/* Copyright (C) 1991, 1992, 1997, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+/* Perform a binary search for KEY in BASE which has NMEMB elements
+ of SIZE bytes each. The comparisons are done by (*COMPAR)(). */
+void *
+bsearch(const void *key, const void *base, size_t nmemb, size_t size,
+ int (*compar)(const void *, const void *))
+{
+ size_t l, u, idx;
+ const void *p;
+ int comparison;
+
+ l = 0;
+ u = nmemb;
+ while (l < u) {
+ idx = (l + u) / 2;
+ p = (void *)(((const char *)base) + (idx * size));
+ comparison = (*compar)(key, p);
+ if (comparison < 0)
+ u = idx;
+ else if (comparison > 0)
+ l = idx + 1;
+ else
+ return (void *)p;
+ }
+
+ return NULL;
+}
+
+EXPORT_SYMBOL(bsearch);
diff -Nru a/lib/qsort.c b/lib/qsort.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/lib/qsort.c Thu Oct 10 18:19:54 2002
@@ -0,0 +1,180 @@
+/*
+ * Update: The Berkeley copyright was changed, and the change
+ * is retroactive to all "true" BSD software (ie everything
+ * from UCB as opposed to other peoples code that just carried
+ * the same license). The new copyright doesn't clash with the
+ * GPL, so the module-only restriction has been removed..
+ */
+
+/*-
+ * Copyright (c) 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ * Copyright (c) 2002 SGI
+ * Copyright (c) 2002 Sun Microsystems, Inc.
+ *
+ * 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.
+ *
+ * From:
+ * @(#)qsort.c 8.1 (Berkeley) 6/4/93
+ * FreeBSD: src/lib/libc/stdlib/qsort.c,v 1.11 2002/03/22 21:53:10
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+typedef int cmp_t(const void *, const void *);
+static inline char *med3(char *, char *, char *, cmp_t *);
+static inline void swapfunc(char *, char *, int, int);
+
+/*
+ * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
+ */
+#define swapcode(TYPE, parmi, parmj, n) do { \
+ long i = (n) / sizeof (TYPE); \
+ TYPE *pi = (TYPE *) (parmi); \
+ TYPE *pj = (TYPE *) (parmj); \
+ do { \
+ TYPE t = *pi; \
+ *pi++ = *pj; \
+ *pj++ = t; \
+ } while (--i > 0); \
+} while (0)
+
+#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \
+ es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1;
+
+static inline void
+swapfunc(char *a, char *b, int n, int swaptype)
+{
+ if(swaptype <= 1)
+ swapcode(long, a, b, n);
+ else
+ swapcode(char, a, b, n);
+}
+
+#define swap(a, b) do { \
+ if (swaptype == 0) { \
+ long t = *(long *)(a); \
+ *(long *)(a) = *(long *)(b); \
+ *(long *)(b) = t; \
+ } else \
+ swapfunc(a, b, es, swaptype); \
+} while (0)
+
+#define vecswap(a, b, n) do { \
+ if ((n) > 0) swapfunc(a, b, n, swaptype); \
+} while (0)
+
+static inline char *
+med3(char *a, char *b, char *c, cmp_t *cmp)
+{
+ return cmp(a, b) < 0 ?
+ (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a ))
+ :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c ));
+}
+
+void
+qsort(void *a, size_t n, size_t es, cmp_t *cmp)
+{
+ char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
+ int d, r, swaptype, swap_cnt;
+
+loop: SWAPINIT(a, es);
+ swap_cnt = 0;
+ if (n < 7) {
+ for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
+ for (pl = pm; pl > (char *)a && cmp(pl - es, pl) > 0;
+ pl -= es)
+ swap(pl, pl - es);
+ return;
+ }
+ pm = (char *)a + (n / 2) * es;
+ if (n > 7) {
+ pl = a;
+ pn = (char *)a + (n - 1) * es;
+ if (n > 40) {
+ d = (n / 8) * es;
+ pl = med3(pl, pl + d, pl + 2 * d, cmp);
+ pm = med3(pm - d, pm, pm + d, cmp);
+ pn = med3(pn - 2 * d, pn - d, pn, cmp);
+ }
+ pm = med3(pl, pm, pn, cmp);
+ }
+ swap(a, pm);
+ pa = pb = (char *)a + es;
+
+ pc = pd = (char *)a + (n - 1) * es;
+ for (;;) {
+ while (pb <= pc && (r = cmp(pb, a)) <= 0) {
+ if (r == 0) {
+ swap_cnt = 1;
+ swap(pa, pb);
+ pa += es;
+ }
+ pb += es;
+ }
+ while (pb <= pc && (r = cmp(pc, a)) >= 0) {
+ if (r == 0) {
+ swap_cnt = 1;
+ swap(pc, pd);
+ pd -= es;
+ }
+ pc -= es;
+ }
+ if (pb > pc)
+ break;
+ swap(pb, pc);
+ swap_cnt = 1;
+ pb += es;
+ pc -= es;
+ }
+ if (swap_cnt == 0) { /* Switch to insertion sort */
+ for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
+ for (pl = pm; pl > (char *)a && cmp(pl - es, pl) > 0;
+ pl -= es)
+ swap(pl, pl - es);
+ return;
+ }
+
+ pn = (char *)a + n * es;
+ r = min_t(long, pa - (char *)a, pb - pa);
+ vecswap(a, pb - r, r);
+ r = min_t(long, pd - pc, pn - pd - es);
+ vecswap(pb, pn - r, r);
+ if ((r = pb - pa) > es)
+ qsort(a, r / es, es, cmp);
+ if ((r = pd - pc) > es) {
+ /* Iterate rather than recurse to save stack space */
+ a = pn - r;
+ n = r / es;
+ goto loop;
+ }
+}
+
+EXPORT_SYMBOL(qsort);
reply other threads:[~2002-10-11 1:28 UTC|newest]
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