flitBuffer.cc revision 11666 
1/*
2 * Copyright (c) 2008 Princeton University
3 * Copyright (c) 2016 Georgia Institute of Technology
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Niket Agarwal
30 *          Tushar Krishna
31 */
32
33
34#include "mem/ruby/network/garnet2.0/flitBuffer.hh"
35
36flitBuffer::flitBuffer()
37{
38    max_size = INFINITE_;
39}
40
41flitBuffer::flitBuffer(int maximum_size)
42{
43    max_size = maximum_size;
44}
45
46bool
47flitBuffer::isEmpty()
48{
49    return (m_buffer.size() == 0);
50}
51
52bool
53flitBuffer::isReady(Cycles curTime)
54{
55    if (m_buffer.size() != 0 ) {
56        flit *t_flit = peekTopFlit();
57        if (t_flit->get_time() <= curTime)
58            return true;
59    }
60    return false;
61}
62
63void
64flitBuffer::print(std::ostream& out) const
65{
66    out << "[flitBuffer: " << m_buffer.size() << "] " << std::endl;
67}
68
69bool
70flitBuffer::isFull()
71{
72    return (m_buffer.size() >= max_size);
73}
74
75void
76flitBuffer::setMaxSize(int maximum)
77{
78    max_size = maximum;
79}
80
81uint32_t
82flitBuffer::functionalWrite(Packet *pkt)
83{
84    uint32_t num_functional_writes = 0;
85
86    for (unsigned int i = 0; i < m_buffer.size(); ++i) {
87        if (m_buffer[i]->functionalWrite(pkt)) {
88            num_functional_writes++;
89        }
90    }
91
92    return num_functional_writes;
93}
94