X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Fback-bdb%2Fidl.c;h=ff85ecee5cdbe683e8bf819ea54f4011bc23717a;hb=5c6976518b2d31112bf5f35ed459b22e5713afff;hp=fec3ec5c73325b0ede37081499db20696088bf7c;hpb=dc0eacd40b625258355eea866d62188e5aa7ce3b;p=openldap
diff --git a/servers/slapd/back-bdb/idl.c b/servers/slapd/back-bdb/idl.c
index fec3ec5c73..ff85ecee5c 100644
--- a/servers/slapd/back-bdb/idl.c
+++ b/servers/slapd/back-bdb/idl.c
@@ -2,7 +2,7 @@
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software .
*
- * Copyright 2000-2005 The OpenLDAP Foundation.
+ * Copyright 2000-2008 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -27,29 +27,24 @@
#define IDL_CMP(x,y) ( x < y ? -1 : ( x > y ? 1 : 0 ) )
-#define IDL_LRU_DELETE( bdb, e ) do { \
- if ( e->idl_lru_prev != NULL ) { \
- e->idl_lru_prev->idl_lru_next = e->idl_lru_next; \
- } else { \
- bdb->bi_idl_lru_head = e->idl_lru_next; \
- } \
- if ( e->idl_lru_next != NULL ) { \
- e->idl_lru_next->idl_lru_prev = e->idl_lru_prev; \
- } else { \
- bdb->bi_idl_lru_tail = e->idl_lru_prev; \
- } \
-} while ( 0 )
-
-#define IDL_LRU_ADD( bdb, e ) do { \
- e->idl_lru_next = bdb->bi_idl_lru_head; \
- if ( e->idl_lru_next != NULL ) { \
- e->idl_lru_next->idl_lru_prev = (e); \
- } \
- (bdb)->bi_idl_lru_head = (e); \
- e->idl_lru_prev = NULL; \
- if ( (bdb)->bi_idl_lru_tail == NULL ) { \
- (bdb)->bi_idl_lru_tail = (e); \
- } \
+#define IDL_LRU_DELETE( bdb, e ) do { \
+ if ( (e) == (bdb)->bi_idl_lru_head ) { \
+ if ( (e)->idl_lru_next == (bdb)->bi_idl_lru_head ) { \
+ (bdb)->bi_idl_lru_head = NULL; \
+ } else { \
+ (bdb)->bi_idl_lru_head = (e)->idl_lru_next; \
+ } \
+ } \
+ if ( (e) == (bdb)->bi_idl_lru_tail ) { \
+ if ( (e)->idl_lru_prev == (bdb)->bi_idl_lru_tail ) { \
+ assert( (bdb)->bi_idl_lru_head == NULL ); \
+ (bdb)->bi_idl_lru_tail = NULL; \
+ } else { \
+ (bdb)->bi_idl_lru_tail = (e)->idl_lru_prev; \
+ } \
+ } \
+ (e)->idl_lru_next->idl_lru_prev = (e)->idl_lru_prev; \
+ (e)->idl_lru_prev->idl_lru_next = (e)->idl_lru_next; \
} while ( 0 )
static int
@@ -224,10 +219,9 @@ int bdb_idl_insert( ID *ids, ID id )
return 0;
}
-#if 0 /* unused */
-static int idl_delete( ID *ids, ID id )
+static int bdb_idl_delete( ID *ids, ID id )
{
- unsigned x = bdb_idl_search( ids, id );
+ unsigned x;
#if IDL_DEBUG > 1
Debug( LDAP_DEBUG_ANY, "delete: %04lx at %d\n", (long) id, x, 0 );
@@ -236,6 +230,23 @@ static int idl_delete( ID *ids, ID id )
idl_check( ids );
#endif
+ if (BDB_IDL_IS_RANGE( ids )) {
+ /* If deleting a range boundary, adjust */
+ if ( ids[1] == id )
+ ids[1]++;
+ else if ( ids[2] == id )
+ ids[2]--;
+ /* deleting from inside a range is a no-op */
+
+ /* If the range has collapsed, re-adjust */
+ if ( ids[1] > ids[2] )
+ ids[0] = 0;
+ else if ( ids[1] == ids[2] )
+ ids[1] = 1;
+ return 0;
+ }
+
+ x = bdb_idl_search( ids, id );
assert( x > 0 );
if( x <= 0 ) {
@@ -264,14 +275,13 @@ static int idl_delete( ID *ids, ID id )
return 0;
}
-#endif /* unused */
static char *
bdb_show_key(
DBT *key,
char *buf )
{
- if ( key->size == sizeof( ID ) ) {
+ if ( key->size == 4 /* LUTIL_HASH_BYTES */ ) {
unsigned char *c = key->data;
sprintf( buf, "[%02x%02x%02x%02x]", c[0], c[1], c[2], c[3] );
return buf;
@@ -292,6 +302,7 @@ bdb_idl_cache_get(
{
bdb_idl_cache_entry_t idl_tmp;
bdb_idl_cache_entry_t *matched_idl_entry;
+ int rc = LDAP_NO_SUCH_OBJECT;
DBT2bv( key, &idl_tmp.kstr );
idl_tmp.db = db;
@@ -301,19 +312,15 @@ bdb_idl_cache_get(
if ( matched_idl_entry != NULL ) {
if ( matched_idl_entry->idl && ids )
BDB_IDL_CPY( ids, matched_idl_entry->idl );
- ldap_pvt_thread_rdwr_runlock( &bdb->bi_idl_tree_rwlock );
- ldap_pvt_thread_mutex_lock( &bdb->bi_idl_tree_lrulock );
- IDL_LRU_DELETE( bdb, matched_idl_entry );
- IDL_LRU_ADD( bdb, matched_idl_entry );
- ldap_pvt_thread_mutex_unlock( &bdb->bi_idl_tree_lrulock );
+ matched_idl_entry->idl_flags |= CACHE_ENTRY_REFERENCED;
if ( matched_idl_entry->idl )
- return LDAP_SUCCESS;
+ rc = LDAP_SUCCESS;
else
- return DB_NOTFOUND;
+ rc = DB_NOTFOUND;
}
ldap_pvt_thread_rdwr_runlock( &bdb->bi_idl_tree_rwlock );
- return LDAP_NO_SUCH_OBJECT;
+ return rc;
}
void
@@ -325,21 +332,22 @@ bdb_idl_cache_put(
int rc )
{
bdb_idl_cache_entry_t idl_tmp;
- bdb_idl_cache_entry_t *ee;
+ bdb_idl_cache_entry_t *ee, *eprev;
+
+ if ( rc == DB_NOTFOUND || BDB_IDL_IS_ZERO( ids ))
+ return;
DBT2bv( key, &idl_tmp.kstr );
ee = (bdb_idl_cache_entry_t *) ch_malloc(
sizeof( bdb_idl_cache_entry_t ) );
ee->db = db;
- if ( rc == DB_NOTFOUND) {
- ee->idl = NULL;
- } else {
- ee->idl = (ID*) ch_malloc( BDB_IDL_SIZEOF ( ids ) );
- BDB_IDL_CPY( ee->idl, ids );
- }
+ ee->idl = (ID*) ch_malloc( BDB_IDL_SIZEOF ( ids ) );
+ BDB_IDL_CPY( ee->idl, ids );
+
ee->idl_lru_prev = NULL;
ee->idl_lru_next = NULL;
+ ee->idl_flags = 0;
ber_dupbv( &ee->kstr, &idl_tmp.kstr );
ldap_pvt_thread_rdwr_wlock( &bdb->bi_idl_tree_rwlock );
if ( avl_insert( &bdb->bi_idl_tree, (caddr_t) ee,
@@ -352,11 +360,34 @@ bdb_idl_cache_put(
return;
}
ldap_pvt_thread_mutex_lock( &bdb->bi_idl_tree_lrulock );
- IDL_LRU_ADD( bdb, ee );
+ /* LRU_ADD */
+ if ( bdb->bi_idl_lru_head ) {
+ assert( bdb->bi_idl_lru_tail != NULL );
+ assert( bdb->bi_idl_lru_head->idl_lru_prev != NULL );
+ assert( bdb->bi_idl_lru_head->idl_lru_next != NULL );
+
+ ee->idl_lru_next = bdb->bi_idl_lru_head;
+ ee->idl_lru_prev = bdb->bi_idl_lru_head->idl_lru_prev;
+ bdb->bi_idl_lru_head->idl_lru_prev->idl_lru_next = ee;
+ bdb->bi_idl_lru_head->idl_lru_prev = ee;
+ } else {
+ ee->idl_lru_next = ee->idl_lru_prev = ee;
+ bdb->bi_idl_lru_tail = ee;
+ }
+ bdb->bi_idl_lru_head = ee;
+
if ( ++bdb->bi_idl_cache_size > bdb->bi_idl_cache_max_size ) {
- int i = 0;
- while ( bdb->bi_idl_lru_tail != NULL && i < 10 ) {
- ee = bdb->bi_idl_lru_tail;
+ int i;
+ ee = bdb->bi_idl_lru_tail;
+ for ( i = 0; ee != NULL && i < 10; i++, ee = eprev ) {
+ eprev = ee->idl_lru_prev;
+ if ( eprev == ee ) {
+ eprev = NULL;
+ }
+ if ( ee->idl_flags & CACHE_ENTRY_REFERENCED ) {
+ ee->idl_flags ^= CACHE_ENTRY_REFERENCED;
+ continue;
+ }
if ( avl_delete( &bdb->bi_idl_tree, (caddr_t) ee,
bdb_idl_entry_cmp ) == NULL ) {
Debug( LDAP_DEBUG_ANY, "=> bdb_idl_cache_put: "
@@ -370,8 +401,10 @@ bdb_idl_cache_put(
ch_free( ee->idl );
ch_free( ee );
}
+ bdb->bi_idl_lru_tail = eprev;
+ assert( bdb->bi_idl_lru_tail != NULL
+ || bdb->bi_idl_lru_head == NULL );
}
-
ldap_pvt_thread_mutex_unlock( &bdb->bi_idl_tree_lrulock );
ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
}
@@ -407,11 +440,69 @@ bdb_idl_cache_del(
ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
}
+void
+bdb_idl_cache_add_id(
+ struct bdb_info *bdb,
+ DB *db,
+ DBT *key,
+ ID id )
+{
+ bdb_idl_cache_entry_t *cache_entry, idl_tmp;
+ DBT2bv( key, &idl_tmp.kstr );
+ idl_tmp.db = db;
+ ldap_pvt_thread_rdwr_wlock( &bdb->bi_idl_tree_rwlock );
+ cache_entry = avl_find( bdb->bi_idl_tree, &idl_tmp,
+ bdb_idl_entry_cmp );
+ if ( cache_entry != NULL ) {
+ if ( !BDB_IDL_IS_RANGE( cache_entry->idl ) &&
+ cache_entry->idl[0] < BDB_IDL_DB_MAX ) {
+ size_t s = BDB_IDL_SIZEOF( cache_entry->idl ) + sizeof(ID);
+ cache_entry->idl = ch_realloc( cache_entry->idl, s );
+ }
+ bdb_idl_insert( cache_entry->idl, id );
+ }
+ ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
+}
+
+void
+bdb_idl_cache_del_id(
+ struct bdb_info *bdb,
+ DB *db,
+ DBT *key,
+ ID id )
+{
+ bdb_idl_cache_entry_t *cache_entry, idl_tmp;
+ DBT2bv( key, &idl_tmp.kstr );
+ idl_tmp.db = db;
+ ldap_pvt_thread_rdwr_wlock( &bdb->bi_idl_tree_rwlock );
+ cache_entry = avl_find( bdb->bi_idl_tree, &idl_tmp,
+ bdb_idl_entry_cmp );
+ if ( cache_entry != NULL ) {
+ bdb_idl_delete( cache_entry->idl, id );
+ if ( cache_entry->idl[0] == 0 ) {
+ if ( avl_delete( &bdb->bi_idl_tree, (caddr_t) cache_entry,
+ bdb_idl_entry_cmp ) == NULL ) {
+ Debug( LDAP_DEBUG_ANY, "=> bdb_idl_cache_del: "
+ "AVL delete failed\n",
+ 0, 0, 0 );
+ }
+ --bdb->bi_idl_cache_size;
+ ldap_pvt_thread_mutex_lock( &bdb->bi_idl_tree_lrulock );
+ IDL_LRU_DELETE( bdb, cache_entry );
+ ldap_pvt_thread_mutex_unlock( &bdb->bi_idl_tree_lrulock );
+ free( cache_entry->kstr.bv_val );
+ free( cache_entry->idl );
+ free( cache_entry );
+ }
+ }
+ ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
+}
+
int
bdb_idl_fetch_key(
BackendDB *be,
DB *db,
- DB_TXN *tid,
+ DB_TXN *txn,
DBT *key,
ID *ids,
DBC **saved_cursor,
@@ -441,7 +532,14 @@ bdb_idl_fetch_key(
#if DB_VERSION_FULL < 0x04010000
# define BDB_ENOUGH 5
#else
+ /* We sometimes test with tiny IDLs, and BDB always wants buffers
+ * that are at least one page in size.
+ */
+# if BDB_IDL_DB_SIZE < 4096
+# define BDB_ENOUGH 2048
+# else
# define BDB_ENOUGH 1
+# endif
#endif
ID buf[BDB_IDL_DB_SIZE*BDB_ENOUGH];
@@ -475,11 +573,9 @@ bdb_idl_fetch_key(
data.ulen = sizeof(buf);
data.flags = DB_DBT_USERMEM;
- if ( tid ) flags |= DB_RMW;
-
/* If we're not reusing an existing cursor, get a new one */
if( opflag != DB_NEXT ) {
- rc = db->cursor( db, tid, &cursor, bdb->bi_db_opflags );
+ rc = db->cursor( db, txn, &cursor, bdb->bi_db_opflags );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY, "=> bdb_idl_fetch_key: "
"cursor failed: %s (%d)\n", db_strerror(rc), rc, 0 );
@@ -606,7 +702,7 @@ bdb_idl_insert_key(
int rc;
DBT data;
DBC *cursor;
- ID lo, hi, tmp, nlo, nhi, nid;
+ ID lo, hi, nlo, nhi, nid;
char *err;
{
@@ -618,10 +714,6 @@ bdb_idl_insert_key(
assert( id != NOID );
- if ( bdb->bi_idl_cache_size ) {
- bdb_idl_cache_del( bdb, db, key );
- }
-
DBTzero( &data );
data.size = sizeof( ID );
data.ulen = data.size;
@@ -639,7 +731,7 @@ bdb_idl_insert_key(
/* Fetch the first data item for this key, to see if it
* exists and if it's a range.
*/
- rc = cursor->c_get( cursor, key, &data, DB_SET | DB_RMW );
+ rc = cursor->c_get( cursor, key, &data, DB_SET );
err = "c_get";
if ( rc == 0 ) {
if ( nlo != 0 ) {
@@ -653,6 +745,7 @@ bdb_idl_insert_key(
if ( count >= BDB_IDL_DB_MAX ) {
/* No room, convert to a range */
DBT key2 = *key;
+ db_recno_t i;
key2.dlen = key2.ulen;
key2.flags |= DB_DBT_PARTIAL;
@@ -679,6 +772,9 @@ bdb_idl_insert_key(
}
}
BDB_DISK2ID( &nhi, &hi );
+ /* Update hi/lo if needed, then delete all the items
+ * between lo and hi
+ */
if ( id < lo ) {
lo = id;
nlo = nid;
@@ -686,16 +782,40 @@ bdb_idl_insert_key(
hi = id;
nhi = nid;
}
- rc = db->del( db, tid, key, 0 );
+ data.data = &nid;
+ /* Don't fetch anything, just position cursor */
+ data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
+ data.dlen = data.ulen = 0;
+ rc = cursor->c_get( cursor, key, &data, DB_SET );
if ( rc != 0 ) {
- err = "del";
+ err = "c_get 2";
goto fail;
}
- data.data = &nid;
+ rc = cursor->c_del( cursor, 0 );
+ if ( rc != 0 ) {
+ err = "c_del range1";
+ goto fail;
+ }
+ /* Delete all the records */
+ for ( i=1; ic_get( cursor, &key2, &data, DB_NEXT_DUP );
+ if ( rc != 0 ) {
+ err = "c_get next_dup";
+ goto fail;
+ }
+ rc = cursor->c_del( cursor, 0 );
+ if ( rc != 0 ) {
+ err = "c_del range";
+ goto fail;
+ }
+ }
+ /* Store the range marker */
+ data.size = data.ulen = sizeof(ID);
+ data.flags = DB_DBT_USERMEM;
nid = 0;
rc = cursor->c_put( cursor, key, &data, DB_KEYFIRST );
if ( rc != 0 ) {
- err = "c_put 0";
+ err = "c_put range";
goto fail;
}
nid = nlo;
@@ -766,6 +886,12 @@ fail:
cursor->c_close( cursor );
return rc;
}
+ /* If key was added (didn't already exist) and using IDL cache,
+ * update key in IDL cache.
+ */
+ if ( !rc && bdb->bi_idl_cache_max_size ) {
+ bdb_idl_cache_add_id( bdb, db, key, id );
+ }
rc = cursor->c_close( cursor );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY, "=> bdb_idl_insert_key: "
@@ -798,7 +924,7 @@ bdb_idl_delete_key(
}
assert( id != NOID );
- if ( bdb->bi_idl_cache_max_size ) {
+ if ( bdb->bi_idl_cache_size ) {
bdb_idl_cache_del( bdb, db, key );
}
@@ -819,7 +945,7 @@ bdb_idl_delete_key(
/* Fetch the first data item for this key, to see if it
* exists and if it's a range.
*/
- rc = cursor->c_get( cursor, key, &data, DB_SET | DB_RMW );
+ rc = cursor->c_get( cursor, key, &data, DB_SET );
err = "c_get";
if ( rc == 0 ) {
if ( tmp != 0 ) {
@@ -827,8 +953,7 @@ bdb_idl_delete_key(
if (tmp != nid) {
/* position to correct item */
tmp = nid;
- rc = cursor->c_get( cursor, key, &data,
- DB_GET_BOTH | DB_RMW );
+ rc = cursor->c_get( cursor, key, &data, DB_GET_BOTH );
if ( rc != 0 ) {
err = "c_get id";
goto fail;
@@ -1175,3 +1300,275 @@ ID bdb_idl_next( ID *ids, ID *cursor )
return NOID;
}
+#ifdef BDB_HIER
+
+/* Add one ID to an unsorted list. We ensure that the first element is the
+ * minimum and the last element is the maximum, for fast range compaction.
+ * this means IDLs up to length 3 are always sorted...
+ */
+int bdb_idl_append_one( ID *ids, ID id )
+{
+ if (BDB_IDL_IS_RANGE( ids )) {
+ /* if already in range, treat as a dup */
+ if (id >= BDB_IDL_FIRST(ids) && id <= BDB_IDL_LAST(ids))
+ return -1;
+ if (id < BDB_IDL_FIRST(ids))
+ ids[1] = id;
+ else if (id > BDB_IDL_LAST(ids))
+ ids[2] = id;
+ return 0;
+ }
+ if ( ids[0] ) {
+ ID tmp;
+
+ if (id < ids[1]) {
+ tmp = ids[1];
+ ids[1] = id;
+ id = tmp;
+ }
+ if ( ids[0] > 1 && id < ids[ids[0]] ) {
+ tmp = ids[ids[0]];
+ ids[ids[0]] = id;
+ id = tmp;
+ }
+ }
+ ids[0]++;
+ if ( ids[0] >= BDB_IDL_UM_MAX ) {
+ ids[0] = NOID;
+ ids[2] = id;
+ } else {
+ ids[ids[0]] = id;
+ }
+ return 0;
+}
+
+/* Append sorted list b to sorted list a. The result is unsorted but
+ * a[1] is the min of the result and a[a[0]] is the max.
+ */
+int bdb_idl_append( ID *a, ID *b )
+{
+ ID ida, idb, tmp, swap = 0;
+
+ if ( BDB_IDL_IS_ZERO( b ) ) {
+ return 0;
+ }
+
+ if ( BDB_IDL_IS_ZERO( a ) ) {
+ BDB_IDL_CPY( a, b );
+ return 0;
+ }
+
+ ida = BDB_IDL_LAST( a );
+ idb = BDB_IDL_LAST( b );
+ if ( BDB_IDL_IS_RANGE( a ) || BDB_IDL_IS_RANGE(b) ||
+ a[0] + b[0] >= BDB_IDL_UM_MAX ) {
+ a[2] = IDL_MAX( ida, idb );
+ a[1] = IDL_MIN( a[1], b[1] );
+ a[0] = NOID;
+ return 0;
+ }
+
+ if ( b[0] > 1 && ida > idb ) {
+ swap = idb;
+ a[a[0]] = idb;
+ b[b[0]] = ida;
+ }
+
+ if ( b[1] < a[1] ) {
+ tmp = a[1];
+ a[1] = b[1];
+ } else {
+ tmp = b[1];
+ }
+ a[0]++;
+ a[a[0]] = tmp;
+
+ if ( b[0] > 1 ) {
+ int i = b[0] - 1;
+ AC_MEMCPY(a+a[0]+1, b+2, i * sizeof(ID));
+ a[0] += i;
+ }
+ if ( swap ) {
+ b[b[0]] = swap;
+ }
+ return 0;
+}
+
+#if 1
+
+/* Quicksort + Insertion sort for small arrays */
+
+#define SMALL 8
+#define SWAP(a,b) itmp=(a);(a)=(b);(b)=itmp
+
+void
+bdb_idl_sort( ID *ids, ID *tmp )
+{
+ int *istack = (int *)tmp;
+ int i,j,k,l,ir,jstack;
+ ID a, itmp;
+
+ if ( BDB_IDL_IS_RANGE( ids ))
+ return;
+
+ ir = ids[0];
+ l = 1;
+ jstack = 0;
+ for(;;) {
+ if (ir - l < SMALL) { /* Insertion sort */
+ for (j=l+1;j<=ir;j++) {
+ a = ids[j];
+ for (i=j-1;i>=1;i--) {
+ if (ids[i] <= a) break;
+ ids[i+1] = ids[i];
+ }
+ ids[i+1] = a;
+ }
+ if (jstack == 0) break;
+ ir = istack[jstack--];
+ l = istack[jstack--];
+ } else {
+ k = (l + ir) >> 1; /* Choose median of left, center, right */
+ SWAP(ids[k], ids[l+1]);
+ if (ids[l] > ids[ir]) {
+ SWAP(ids[l], ids[ir]);
+ }
+ if (ids[l+1] > ids[ir]) {
+ SWAP(ids[l+1], ids[ir]);
+ }
+ if (ids[l] > ids[l+1]) {
+ SWAP(ids[l], ids[l+1]);
+ }
+ i = l+1;
+ j = ir;
+ a = ids[l+1];
+ for(;;) {
+ do i++; while(ids[i] < a);
+ do j--; while(ids[j] > a);
+ if (j < i) break;
+ SWAP(ids[i],ids[j]);
+ }
+ ids[l+1] = ids[j];
+ ids[j] = a;
+ jstack += 2;
+ if (ir-i+1 >= j-1) {
+ istack[jstack] = ir;
+ istack[jstack-1] = i;
+ ir = j-1;
+ } else {
+ istack[jstack] = j-1;
+ istack[jstack-1] = l;
+ l = i;
+ }
+ }
+ }
+}
+
+#else
+
+/* 8 bit Radix sort + insertion sort
+ *
+ * based on code from http://www.cubic.org/docs/radix.htm
+ * with improvements by mbackes@symas.com and hyc@symas.com
+ *
+ * This code is O(n) but has a relatively high constant factor. For lists
+ * up to ~50 Quicksort is slightly faster; up to ~100 they are even.
+ * Much faster than quicksort for lists longer than ~100. Insertion
+ * sort is actually superior for lists <50.
+ */
+
+#define BUCKETS (1<<8)
+#define SMALL 50
+
+void
+bdb_idl_sort( ID *ids, ID *tmp )
+{
+ int count, soft_limit, phase = 0, size = ids[0];
+ ID *idls[2];
+ unsigned char *maxv = (unsigned char *)&ids[size];
+
+ if ( BDB_IDL_IS_RANGE( ids ))
+ return;
+
+ /* Use insertion sort for small lists */
+ if ( size <= SMALL ) {
+ int i,j;
+ ID a;
+
+ for (j=1;j<=size;j++) {
+ a = ids[j];
+ for (i=j-1;i>=1;i--) {
+ if (ids[i] <= a) break;
+ ids[i+1] = ids[i];
+ }
+ ids[i+1] = a;
+ }
+ return;
+ }
+
+ tmp[0] = size;
+ idls[0] = ids;
+ idls[1] = tmp;
+
+#if BYTE_ORDER == BIG_ENDIAN
+ for (soft_limit = 0; !maxv[soft_limit]; soft_limit++);
+#else
+ for (soft_limit = sizeof(ID)-1; !maxv[soft_limit]; soft_limit--);
+#endif
+
+ for (
+#if BYTE_ORDER == BIG_ENDIAN
+ count = sizeof(ID)-1; count >= soft_limit; --count
+#else
+ count = 0; count <= soft_limit; ++count
+#endif
+ ) {
+ unsigned int num[BUCKETS], * np, n, sum;
+ int i;
+ ID *sp, *source, *dest;
+ unsigned char *bp, *source_start;
+
+ source = idls[phase]+1;
+ dest = idls[phase^1]+1;
+ source_start = ((unsigned char *) source) + count;
+
+ np = num;
+ for ( i = BUCKETS; i > 0; --i ) *np++ = 0;
+
+ /* count occurences of every byte value */
+ bp = source_start;
+ for ( i = size; i > 0; --i, bp += sizeof(ID) )
+ num[*bp]++;
+
+ /* transform count into index by summing elements and storing
+ * into same array
+ */
+ sum = 0;
+ np = num;
+ for ( i = BUCKETS; i > 0; --i ) {
+ n = *np;
+ *np++ = sum;
+ sum += n;
+ }
+
+ /* fill dest with the right values in the right place */
+ bp = source_start;
+ sp = source;
+ for ( i = size; i > 0; --i, bp += sizeof(ID) ) {
+ np = num + *bp;
+ dest[*np] = *sp++;
+ ++(*np);
+ }
+ phase ^= 1;
+ }
+
+ /* copy back from temp if needed */
+ if ( phase ) {
+ ids++; tmp++;
+ for ( count = 0; count < size; ++count )
+ *ids++ = *tmp++;
+ }
+}
+#endif /* Quick vs Radix */
+
+#endif /* BDB_HIER */