PLearn 0.1
Poll.h
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00001 // -*- C++ -*-
00002 
00003 // Poll.h
00004 //
00005 // Copyright (C) 2005 Christian Hudon 
00006 // Copyright (C) 2007 Xavier Saint-Mleux, ApSTAT Technologies inc.
00007 // 
00008 // Redistribution and use in source and binary forms, with or without
00009 // modification, are permitted provided that the following conditions are met:
00010 // 
00011 //  1. Redistributions of source code must retain the above copyright
00012 //     notice, this list of conditions and the following disclaimer.
00013 // 
00014 //  2. Redistributions in binary form must reproduce the above copyright
00015 //     notice, this list of conditions and the following disclaimer in the
00016 //     documentation and/or other materials provided with the distribution.
00017 // 
00018 //  3. The name of the authors may not be used to endorse or promote
00019 //     products derived from this software without specific prior written
00020 //     permission.
00021 // 
00022 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00023 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00024 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00025 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00026 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00027 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00028 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00029 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00030 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00031 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 // 
00033 // This file is part of the PLearn library. For more information on the PLearn
00034 // library, go to the PLearn Web site at www.plearn.org
00035 
00036 /* *******************************************************      
00037  * $Id: Poll.h 8837 2008-04-19 01:25:41Z lamblin $ 
00038  ******************************************************* */
00039 
00040 // Authors: Christian Hudon
00041 
00045 #ifndef Poll_INC
00046 #define Poll_INC
00047 
00048 #include <vector>
00049 #include <nspr/prio.h>
00050 #include <plearn/io/PStream.h>
00051 #include <plearn/math/TVec.h>
00052 
00053 namespace PLearn {
00054 using namespace std;
00055 
00056 
00060 class Poll {
00061     
00062 public:
00063     void setStreamsToWatch(const vector<PStream>& streams);
00064 
00065     int waitForEvents(uint32_t timeout = 0, bool shuffle_events_= false);
00066 
00067     PStream getNextPendingEvent();
00068 
00069 protected:
00071     vector<PStream> m_streams_to_watch;
00072 
00075     vector<PRPollDesc> m_poll_descriptors;
00076 
00079     unsigned int m_next_unexamined_event;
00080 
00081     int last_n_poll_events; //nb. events for the last PR_Poll; indicates wether out_flags s/b used.
00082     bool shuffle_events;
00083     TVec<int> shuffled_index;
00084 };
00085 
00086 } // end of namespace PLearn
00087 
00088 #endif
00089 
00090 
00091 /*
00092   Local Variables:
00093   mode:c++
00094   c-basic-offset:4
00095   c-file-style:"stroustrup"
00096   c-file-offsets:((innamespace . 0)(inline-open . 0))
00097   indent-tabs-mode:nil
00098   fill-column:79
00099   End:
00100 */
00101 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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