ysr@777: /*
ysr@777:  * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
ysr@777:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
ysr@777:  * CA 95054 USA or visit www.sun.com if you need additional information or
ysr@777:  * have any questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
ysr@777: void PtrQueue::handle_zero_index() {
ysr@777:   assert(0 == _index, "Precondition.");
ysr@777:   // This thread records the full buffer and allocates a new one (while
ysr@777:   // holding the lock if there is one).
ysr@777:   void** buf = _buf;
ysr@777:   _buf = qset()->allocate_buffer();
ysr@777:   _sz = qset()->buffer_size();
ysr@777:   _index = _sz;
ysr@777:   assert(0 <= _index && _index <= _sz, "Invariant.");
ysr@777:   if (buf != NULL) {
ysr@777:     if (_lock) {
ysr@777:       locking_enqueue_completed_buffer(buf);
ysr@777:     } else {
ysr@777:       qset()->enqueue_complete_buffer(buf);
ysr@777:     }
ysr@777:   }
ysr@777: }