fd_entry.cc revision 10930 
1/*
2 * Copyright (c) 2015 Advanced Micro Devices, Inc.
3 * Copyright (c) 2001-2005 The Regents of The University of Michigan
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 *          Steve Reinhardt
30 */
31
32#include "base/misc.hh"
33#include "fd_entry.hh"
34
35using namespace std;
36
37void
38FDEntry::serialize(CheckpointOut &cp) const
39{
40    SERIALIZE_SCALAR(fd);
41    if (fd != -1) {
42        SERIALIZE_SCALAR(mode);
43        SERIALIZE_SCALAR(flags);
44        SERIALIZE_SCALAR(isPipe);
45        SERIALIZE_SCALAR(readPipeSource);
46        SERIALIZE_SCALAR(fileOffset);
47        SERIALIZE_SCALAR(filename);
48    }
49    if (driver)
50        warn("EmulatedDriver objects do not currently support checkpoints");
51}
52
53void
54FDEntry::unserialize(CheckpointIn &cp)
55{
56    UNSERIALIZE_SCALAR(fd);
57    if (fd != -1) {
58        UNSERIALIZE_SCALAR(mode);
59        UNSERIALIZE_SCALAR(flags);
60        UNSERIALIZE_SCALAR(isPipe);
61        UNSERIALIZE_SCALAR(readPipeSource);
62        UNSERIALIZE_SCALAR(fileOffset);
63        UNSERIALIZE_SCALAR(filename);
64    }
65    driver = NULL;
66}
67
68bool
69FDEntry::isFree()
70{
71    return (fd == -1 && driver == NULL);
72}
73
74void
75FDEntry::set(int sim_fd, const string name, int flags, int mode, bool pipe)
76{
77    fd = sim_fd;
78    filename = name;
79    this->flags = flags;
80    this->mode = mode;
81    isPipe = pipe;
82    fileOffset = 0;
83    readPipeSource = 0;
84    driver = NULL;
85}
86
87void
88FDEntry::reset()
89{
90    set(-1, "", 0, 0, false);
91}
92