3bc6d6c59a
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3845 a95241bf-73f2-0310-859d-f6bbb57e9c96
107 lines
2.6 KiB
C++
107 lines
2.6 KiB
C++
//------------------------------------------------------------------------------
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// Copyright (c) 2001-2002, OpenBeOS
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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// File Name: PortQueue.cpp
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// Author: DarkWyrm <bpmagic@columbus.rr.com>
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// Description: Facilitation class for reading and queueing messages from ports
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//
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//------------------------------------------------------------------------------
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#include "PortQueue.h"
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#include "PortMessage.h"
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PortQueue::PortQueue(const port_id &port)
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{
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port_info pi;
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_init=(get_port_info(port,&pi)==B_OK)?true:false;
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_port=port;
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}
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PortQueue::~PortQueue(void)
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{
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MakeEmpty();
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}
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bool PortQueue::SetPort(const port_id &port)
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{
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port_info pi;
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_init=(get_port_info(port,&pi)==B_OK)?true:false;
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_port=port;
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return _init;
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}
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void PortQueue::GetMessagesFromPort(bool wait_for_messages)
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{
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if(_init)
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{
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PortMessage *msg;
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ssize_t size;
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port_info pi;
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get_port_info(_port, &pi);
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status_t stat;
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if(pi.queue_count==0 && wait_for_messages)
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{
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size=port_buffer_size(_port);
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// now that there is a message, we'll just fall through to the
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// port-emptying loop
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get_port_info(_port, &pi);
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}
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for(int32 i=0; i<pi.queue_count; i++)
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{
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msg=new PortMessage();
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stat=msg->ReadFromPort(_port,0);
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if(stat!=B_OK)
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{
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delete msg;
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break;
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}
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_q.push(msg);
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}
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}
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}
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PortMessage *PortQueue::GetMessageFromQueue(void)
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{
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if(_q.empty())
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return NULL;
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PortMessage *msg=_q.front();
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_q.pop();
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return msg;
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}
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void PortQueue::MakeEmpty(void)
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{
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PortMessage *msg;
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while(!_q.empty())
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{
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msg=_q.front();
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_q.pop();
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delete msg;
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}
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}
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