3 * Copyright 2008,2009 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
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)
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.
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.
21 #ifndef INCLUDED_GR_TPB_DETAIL_H
22 #define INCLUDED_GR_TPB_DETAIL_H
24 #include <gruel/thread.h>
26 #include <gruel/pmt.h>
28 class gr_block_detail;
31 * \brief used by thread-per-block scheduler
33 struct gr_tpb_detail {
35 gruel::mutex mutex; //< protects all vars
37 gruel::condition_variable input_cond;
39 gruel::condition_variable output_cond;
42 std::deque<pmt::pmt_t> msg_queue;
46 : input_changed(false), output_changed(false) { }
48 //! Called by us to tell all our upstream blocks that their output may have changed.
49 void notify_upstream(gr_block_detail *d);
51 //! Called by us to tell all our downstream blocks that their input may have changed.
52 void notify_downstream(gr_block_detail *d);
54 //! Called by us to notify both upstream and downstream
55 void notify_neighbors(gr_block_detail *d);
60 gruel::scoped_lock guard(mutex);
61 input_changed = false;
62 output_changed = false;
65 //! is the queue empty?
66 bool empty_p() const { return msg_queue.empty(); }
68 //| Acquires and release the mutex
69 void insert_tail(pmt::pmt_t msg);
72 * \returns returns pmt at head of queue or pmt_t() if empty.
74 pmt::pmt_t delete_head_nowait();
77 * \returns returns pmt at head of queue or pmt_t() if empty.
78 * Caller must already be holding the mutex
80 pmt::pmt_t delete_head_nowait_already_holding_mutex();
84 //! Used by notify_downstream
85 void set_input_changed()
87 gruel::scoped_lock guard(mutex);
89 input_cond.notify_one();
92 //! Used by notify_upstream
93 void set_output_changed()
95 gruel::scoped_lock guard(mutex);
96 output_changed = true;
97 output_cond.notify_one();
102 #endif /* INCLUDED_GR_TPB_DETAIL_H */