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Commit | Line | Data |
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28a4c9c5 | 1 | /* |
b3f22de0 | 2 | * This file is part of the PulseView project. |
28a4c9c5 JH |
3 | * |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
1b1ec774 | 21 | #include "snapshot.h" |
28a4c9c5 | 22 | |
f556bc6a JH |
23 | #include <assert.h> |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | ||
819f4c25 JH |
27 | using boost::lock_guard; |
28 | using boost::recursive_mutex; | |
7d29656f | 29 | |
51e77110 | 30 | namespace pv { |
1b1ec774 | 31 | namespace data { |
51e77110 | 32 | |
1b1ec774 | 33 | Snapshot::Snapshot(int unit_size) : |
f556bc6a | 34 | _data(NULL), |
77bff0b1 | 35 | _sample_count(0), |
27d7c96b | 36 | _capacity(0), |
f556bc6a JH |
37 | _unit_size(unit_size) |
38 | { | |
7d29656f | 39 | lock_guard<recursive_mutex> lock(_mutex); |
f556bc6a JH |
40 | assert(_unit_size > 0); |
41 | } | |
42 | ||
1b1ec774 | 43 | Snapshot::~Snapshot() |
28a4c9c5 | 44 | { |
7d29656f | 45 | lock_guard<recursive_mutex> lock(_mutex); |
f556bc6a | 46 | free(_data); |
28a4c9c5 JH |
47 | } |
48 | ||
e7c6e898 | 49 | uint64_t Snapshot::get_sample_count() const |
28a4c9c5 | 50 | { |
7d29656f | 51 | lock_guard<recursive_mutex> lock(_mutex); |
77bff0b1 | 52 | return _sample_count; |
f556bc6a JH |
53 | } |
54 | ||
6fd14a32 JH |
55 | int Snapshot::unit_size() const |
56 | { | |
57 | return _unit_size; | |
58 | } | |
59 | ||
27d7c96b DK |
60 | void Snapshot::set_capacity(const uint64_t new_capacity) |
61 | { | |
62 | lock_guard<recursive_mutex> lock(_mutex); | |
63 | ||
64 | assert(_capacity >= _sample_count); | |
65 | if (new_capacity > _capacity) { | |
66 | _capacity = new_capacity; | |
67 | _data = realloc(_data, (new_capacity * _unit_size) + sizeof(uint64_t)); | |
68 | } | |
69 | } | |
70 | ||
71 | uint64_t Snapshot::capacity() const | |
72 | { | |
73 | lock_guard<recursive_mutex> lock(_mutex); | |
74 | return _capacity; | |
75 | } | |
76 | ||
1b1ec774 | 77 | void Snapshot::append_data(void *data, uint64_t samples) |
f556bc6a | 78 | { |
7d29656f | 79 | lock_guard<recursive_mutex> lock(_mutex); |
27d7c96b DK |
80 | |
81 | assert(_capacity >= _sample_count); | |
82 | ||
83 | // Ensure there's enough capacity to copy. | |
84 | const uint64_t free_space = _capacity - _sample_count; | |
85 | if (free_space < samples) { | |
86 | set_capacity(_sample_count + samples); | |
87 | } | |
88 | ||
77bff0b1 JH |
89 | memcpy((uint8_t*)_data + _sample_count * _unit_size, |
90 | data, samples * _unit_size); | |
91 | _sample_count += samples; | |
28a4c9c5 | 92 | } |
51e77110 | 93 | |
1b1ec774 | 94 | } // namespace data |
51e77110 | 95 | } // namespace pv |