--- /dev/null 2015-03-30 22:03:25.000000000 -0500 +++ new/jdk/src/windows/native/sun/bridge/AccessBridgeMessageQueue.cpp 2015-03-30 22:03:24.955834300 -0500 @@ -0,0 +1,186 @@ +/* + * Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code 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 General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* + * A class to manage queueing of messages for IPC + */ + +#include "AccessBridgeDebug.h" +#include "AccessBridgeMessageQueue.h" +#include "AccessBridgePackages.h" // for debugging only +#include +#include + +DEBUG_CODE(extern HWND theDialogWindow); +extern "C" { + DEBUG_CODE(void AppendToCallInfo(char *s)); +} + +// ------------------- + + +AccessBridgeQueueElement::AccessBridgeQueueElement(char *buf, int size) { + bufsize = size; + next = (AccessBridgeQueueElement *) 0; + previous = (AccessBridgeQueueElement *) 0; + buffer = (char *) malloc(bufsize); + memcpy(buffer, buf, bufsize); +} + +AccessBridgeQueueElement::~AccessBridgeQueueElement() { + // delete buffer; + free(buffer); +} + + +// ------------------- + + +AccessBridgeMessageQueue::AccessBridgeMessageQueue() { + queueLocked = FALSE; + queueRemoveLocked = FALSE; + start = (AccessBridgeQueueElement *) 0; + end = (AccessBridgeQueueElement *) 0; + size = 0; +} + +AccessBridgeMessageQueue::~AccessBridgeMessageQueue() { + // empty queue, then exit +} + +/** + * getEventsWaiting - gets the number of events waiting to fire + */ +int +AccessBridgeMessageQueue::getEventsWaiting() { + return size; +} + +/** + * add - add an element to the queue, which is locked with semaphores + * + */ +QueueReturns +AccessBridgeMessageQueue::add(AccessBridgeQueueElement *element) { + PrintDebugString(" in AccessBridgeMessageQueue::add()"); + PrintDebugString(" queue size = %d", size); + + QueueReturns returnVal = cElementPushedOK; + if (queueLocked) { + PrintDebugString(" queue was locked; returning cQueueInUse!"); + return cQueueInUse; + } + queueLocked = TRUE; + { + PrintDebugString(" adding element to queue!"); + if (end == (AccessBridgeQueueElement *) 0) { + if (start == (AccessBridgeQueueElement *) 0 && size == 0) { + start = element; + end = element; + element->previous = (AccessBridgeQueueElement *) 0; + element->next = (AccessBridgeQueueElement *) 0; + size++; + } else { + returnVal = cQueueBroken; // bad voodo! + } + } else { + element->previous = end; + element->next = (AccessBridgeQueueElement *) 0; + end->next = element; + end = element; + size++; + } + } + queueLocked = FALSE; + PrintDebugString(" returning from AccessBridgeMessageQueue::add()"); + return returnVal; +} + + +/** + * remove - remove an element from the queue, which is locked with semaphores + * + */ +QueueReturns +AccessBridgeMessageQueue::remove(AccessBridgeQueueElement **element) { + PrintDebugString(" in AccessBridgeMessageQueue::remove()"); + PrintDebugString(" queue size = %d", size); + + QueueReturns returnVal = cMoreMessages; + if (queueLocked) { + PrintDebugString(" queue was locked; returning cQueueInUse!"); + return cQueueInUse; + } + queueLocked = TRUE; + { + PrintDebugString(" removing element from queue!"); + if (size > 0) { + if (start != (AccessBridgeQueueElement *) 0) { + *element = start; + start = start->next; + if (start != (AccessBridgeQueueElement *) 0) { + start->previous = (AccessBridgeQueueElement *) 0; + } else { + end = (AccessBridgeQueueElement *) 0; + if (size != 1) { + returnVal = cQueueBroken; // bad voodo, should only be 1 in this situation + } + } + size--; + } else { + returnVal = cQueueBroken; // bad voodo! + } + } else { + returnVal = cQueueEmpty; + } + } + queueLocked = FALSE; + PrintDebugString(" returning from AccessBridgeMessageQueue::remove()"); + return returnVal; +} + + +/** + * setRemoveLock - set the state of the removeLock (TRUE or FALSE) + * + */ +QueueReturns +AccessBridgeMessageQueue::setRemoveLock(BOOL removeLockSetting) { + if (queueLocked) { + return cQueueInUse; + } + queueRemoveLocked = removeLockSetting; + + return cQueueOK; +} + +/** + * setRemoveLock - set the state of the removeLock (TRUE or FALSE) + * + */ +BOOL +AccessBridgeMessageQueue::getRemoveLockSetting() { + return queueRemoveLocked; +}