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   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright 2006 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 2, 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
  18  * along with GNU Radio; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street,
  20  * Boston, MA 02110-1301, USA.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #define GR_RUNTIME_IMPL_DEBUG 0
  28
  29 #include <gr_runtime_impl.h>
  30 #include <gr_simple_flowgraph.h>
  31 #include <gr_hier_block2.h>
  32 #include <gr_hier_block2_detail.h>
  33 #include <stdexcept>
  34 #include <iostream>
  35
  36 gr_runtime_impl::gr_runtime_impl(gr_hier_block2_sptr top_block) :
  37 d_running(false),
  38 d_top_block(top_block),
  39 d_sfg(gr_make_simple_flowgraph()),
  40 d_graphs()
  41 {
  42 }
  43
  44 gr_runtime_impl::~gr_runtime_impl()
  45 {
  46 }
  47
  48 void
  49 gr_runtime_impl::start()
  50 {
  51     if (d_running)
  52         throw std::runtime_error("already running");
  53     else
  54         d_running = true;
  55
  56     d_sfg->d_detail->reset();
  57     d_top_block->d_detail->flatten(d_sfg);
  58     d_sfg->d_detail->validate();
  59     d_sfg->d_detail->setup_connections();
  60
  61     d_graphs = d_sfg->d_detail->partition();
  62     if (GR_RUNTIME_IMPL_DEBUG)
  63         std::cout << "Flow graph has " << d_graphs.size()
  64                   << " sub-graphs." << std::endl;
  65
  66     d_threads.clear();
  67     for (std::vector<gr_block_vector_t>::iterator p = d_graphs.begin();
  68          p != d_graphs.end(); p++) {
  69         gr_scheduler_thread_sptr thread = gr_make_scheduler_thread(*p);
  70         thread->start();
  71         d_threads.push_back(thread);
  72     }
  73 }
  74
  75 void
  76 gr_runtime_impl::stop()
  77 {
  78     if (!d_running)
  79         return;
  80
  81     for (gr_scheduler_thread_viter_t p = d_threads.begin();
  82          p != d_threads.end(); p++)
  83         (*p)->stop();
  84
  85     d_running = false;
  86 }
  87
  88 void
  89 gr_runtime_impl::wait()
  90 {
  91     for (gr_scheduler_thread_viter_t p = d_threads.begin();
  92          p != d_threads.end(); p++) {
  93         while(1) {
  94             (*p)->join(NULL);
  95             if (!(*p)->state() == omni_thread::STATE_TERMINATED)
  96                 break;
  97         }
  98     }
  99 }
 100
 101 gr_scheduler_thread_sptr gr_make_scheduler_thread(gr_block_vector_t graph)
 102 {
 103     return gr_scheduler_thread_sptr(new gr_scheduler_thread(graph));
 104 }
 105
 106 gr_scheduler_thread::gr_scheduler_thread(gr_block_vector_t graph) :
 107     omni_thread(NULL, PRIORITY_NORMAL),
 108     d_sts(gr_make_single_threaded_scheduler(graph))
 109 {
 110 }
 111
 112 gr_scheduler_thread::~gr_scheduler_thread()
 113 {
 114 }
 115
 116 void gr_scheduler_thread::start()
 117 {
 118     start_undetached();
 119 }
 120
 121 void *gr_scheduler_thread::run_undetached(void *arg)
 122 {
 123     d_sts->run();
 124     return 0;
 125 }
 126
 127 void gr_scheduler_thread::stop()
 128 {
 129     d_sts->stop();
 130 }