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   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright 2008,2009 Free Software Foundation, Inc.
   4  *
   5  * This file is part of GNU Radio
   6  *
   7  * GNU Radio is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3, or (at your option)
  10  * any later version.
  11  *
  12  * GNU Radio is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21 #ifdef HAVE_CONFIG_H
  22 #include <config.h>
  23 #endif
  24 #include <gr_tpb_thread_body.h>
  25 #include <iostream>
  26 #include <boost/thread.hpp>
  27 #include <gruel/pmt.h>
  28
  29 using namespace pmt;
  30
  31 gr_tpb_thread_body::gr_tpb_thread_body(gr_block_sptr block)
  32   : d_exec(block)
  33 {
  34   // std::cerr << "gr_tpb_thread_body: " << block << std::endl;
  35
  36   gr_block_detail *d = block->detail().get();
  37   gr_block_executor::state s;
  38
  39   while (1){
  40     boost::this_thread::interruption_point();
  41
  42     while (!block->msg_queue()->empty_p())
  43       block->handle_msg(block->msg_queue()->delete_head_nowait());
  44
  45     d->d_tpb.clear_changed();
  46     s = d_exec.run_one_iteration();
  47
  48     switch(s){
  49     case gr_block_executor::READY:              // Tell neighbors we made progress.
  50       d->d_tpb.notify_neighbors(d);
  51       break;
  52
  53     case gr_block_executor::READY_NO_OUTPUT:    // Notify upstream only
  54       d->d_tpb.notify_upstream(d);
  55       break;
  56
  57     case gr_block_executor::DONE:               // Game over.
  58       d->d_tpb.notify_neighbors(d);
  59       return;
  60
  61     case gr_block_executor::BLKD_IN:            // Wait for input.
  62       while (!d->d_tpb.input_changed)
  63       {
  64         boost::this_thread::interruption_point();
  65         gruel::scoped_lock guard(d->d_tpb.mutex);
  66
  67         // Block then wake on input_changed or msg arrived
  68         while(!d->d_tpb.input_changed && !block->msg_queue()->empty_p())
  69           d->d_tpb.input_cond.wait(guard);
  70
  71         // Run msgq while unlocked
  72         guard.unlock();
  73         while (!block->msg_queue()->empty_p())
  74           block->handle_msg(block->msg_queue()->delete_head_nowait());
  75       }
  76       break;
  77
  78
  79     case gr_block_executor::BLKD_OUT:           // Wait for output buffer space.
  80       while (!d->d_tpb.output_changed)
  81       {
  82         boost::this_thread::interruption_point();
  83         gruel::scoped_lock guard(d->d_tpb.mutex);
  84
  85         // Block then wake on output_changed or msg arrived
  86         while(!d->d_tpb.output_changed && !block->msg_queue()->empty_p())
  87           d->d_tpb.output_cond.wait(guard);
  88
  89         // Run msgq while unlocked
  90         guard.unlock();
  91         while (!block->msg_queue()->empty_p())
  92           block->handle_msg(block->msg_queue()->delete_head_nowait());
  93       }
  94       break;
  95
  96     default:
  97       assert(0);
  98     }
  99   }
 100 }
 101
 102 gr_tpb_thread_body::~gr_tpb_thread_body()
 103 {
 104 }