Mercurial > hg > orthanc-stone
annotate Framework/Toolbox/DownloadStack.cpp @ 47:28956ed68280
agpl license
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 27 Apr 2017 11:00:15 +0200 |
| parents | 7207a407bcd8 |
| children | c2dc924f1a63 4cff7b1ed31d |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
|
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7207a407bcd8
shared copyright with osimis
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
16
diff
changeset
|
5 * Copyright (C) 2017 Osimis, Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 47 | 8 * modify it under the terms of the GNU Affero General Public License |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 0 | 11 * |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 47 | 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 0 | 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "DownloadStack.h" | |
| 23 | |
| 16 | 24 #include "../../Resources/Orthanc/Core/OrthancException.h" |
| 0 | 25 |
| 26 #include <cassert> | |
| 27 | |
| 28 namespace OrthancStone | |
| 29 { | |
| 30 bool DownloadStack::CheckInvariants() const | |
| 31 { | |
| 32 std::vector<bool> dequeued(nodes_.size(), true); | |
| 33 | |
| 34 int i = firstNode_; | |
| 35 while (i != NIL) | |
| 36 { | |
| 37 const Node& node = nodes_[i]; | |
| 38 | |
| 39 dequeued[i] = false; | |
| 40 | |
| 41 if (node.next_ != NIL && | |
| 42 nodes_[node.next_].prev_ != i) | |
| 43 { | |
| 44 return false; | |
| 45 } | |
| 46 | |
| 47 if (node.prev_ != NIL && | |
| 48 nodes_[node.prev_].next_ != i) | |
| 49 { | |
| 50 return false; | |
| 51 } | |
| 52 | |
| 53 i = nodes_[i].next_; | |
| 54 } | |
| 55 | |
| 56 for (size_t i = 0; i < nodes_.size(); i++) | |
| 57 { | |
| 58 if (nodes_[i].dequeued_ != dequeued[i]) | |
| 59 { | |
| 60 return false; | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 return true; | |
| 65 } | |
| 66 | |
| 67 | |
| 68 DownloadStack::DownloadStack(unsigned int size) | |
| 69 { | |
| 70 nodes_.resize(size); | |
| 71 | |
| 72 if (size == 0) | |
| 73 { | |
| 74 firstNode_ = NIL; | |
| 75 } | |
| 76 else | |
| 77 { | |
| 78 for (size_t i = 0; i < size; i++) | |
| 79 { | |
| 80 nodes_[i].prev_ = i - 1; | |
| 81 nodes_[i].next_ = i + 1; | |
| 82 nodes_[i].dequeued_ = false; | |
| 83 } | |
| 84 | |
| 85 nodes_.front().prev_ = NIL; | |
| 86 nodes_.back().next_ = NIL; | |
| 87 firstNode_ = 0; | |
| 88 } | |
| 89 | |
| 90 assert(CheckInvariants()); | |
| 91 } | |
| 92 | |
| 93 | |
| 94 DownloadStack::~DownloadStack() | |
| 95 { | |
| 96 assert(CheckInvariants()); | |
| 97 } | |
| 98 | |
| 99 | |
| 100 bool DownloadStack::Pop(unsigned int& value) | |
| 101 { | |
| 102 boost::mutex::scoped_lock lock(mutex_); | |
| 103 | |
| 104 assert(CheckInvariants()); | |
| 105 | |
| 106 if (firstNode_ == NIL) | |
| 107 { | |
| 108 for (size_t i = 0; i < nodes_.size(); i++) | |
| 109 { | |
| 110 assert(nodes_[i].dequeued_); | |
| 111 } | |
| 112 | |
| 113 return false; | |
| 114 } | |
| 115 else | |
| 116 { | |
| 117 assert(firstNode_ >= 0 && firstNode_ < static_cast<int>(nodes_.size())); | |
| 118 value = firstNode_; | |
| 119 | |
| 120 Node& node = nodes_[firstNode_]; | |
| 121 assert(node.prev_ == NIL); | |
| 122 assert(!node.dequeued_); | |
| 123 | |
| 124 node.dequeued_ = true; | |
| 125 firstNode_ = node.next_; | |
| 126 | |
| 127 if (firstNode_ != NIL) | |
| 128 { | |
| 129 nodes_[firstNode_].prev_ = NIL; | |
| 130 } | |
| 131 | |
| 132 return true; | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 | |
| 137 void DownloadStack::SetTopNodeInternal(unsigned int value) | |
| 138 { | |
| 139 assert(CheckInvariants()); | |
| 140 | |
| 141 Node& node = nodes_[value]; | |
| 142 | |
| 143 if (node.dequeued_) | |
| 144 { | |
| 145 // This node has already been processed by the download thread, nothing to do | |
| 146 return; | |
| 147 } | |
| 148 | |
| 149 // Remove the node from the list | |
| 150 if (node.prev_ == NIL) | |
| 151 { | |
| 152 assert(firstNode_ == static_cast<int>(value)); | |
| 153 | |
| 154 // This is already the top node in the list, nothing to do | |
| 155 return; | |
| 156 } | |
| 157 | |
| 158 nodes_[node.prev_].next_ = node.next_; | |
| 159 | |
| 160 if (node.next_ != NIL) | |
| 161 { | |
| 162 nodes_[node.next_].prev_ = node.prev_; | |
| 163 } | |
| 164 | |
| 165 // Add back the node at the top of the list | |
| 166 assert(firstNode_ != NIL); | |
| 167 | |
| 168 Node& old = nodes_[firstNode_]; | |
| 169 assert(old.prev_ == NIL); | |
| 170 assert(!old.dequeued_); | |
| 171 node.prev_ = NIL; | |
| 172 node.next_ = firstNode_; | |
| 173 old.prev_ = value; | |
| 174 | |
| 175 firstNode_ = value; | |
| 176 } | |
| 177 | |
| 178 | |
| 179 void DownloadStack::Writer::SetTopNode(unsigned int value) | |
| 180 { | |
| 181 if (value >= that_.nodes_.size()) | |
| 182 { | |
| 183 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 184 } | |
| 185 | |
| 186 that_.SetTopNodeInternal(value); | |
| 187 } | |
| 188 | |
| 189 | |
| 190 void DownloadStack::Writer::SetTopNodePermissive(int value) | |
| 191 { | |
| 192 if (value >= 0 && | |
| 193 value < static_cast<int>(that_.nodes_.size())) | |
| 194 { | |
| 195 that_.SetTopNodeInternal(value); | |
| 196 } | |
| 197 } | |
| 198 } |