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annotate deps/Platinum/Source/Core/PltTaskManager.cpp @ 0:3425707ddbf6

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author fraserofthenight
date Mon, 06 Jul 2009 08:06:28 -0700
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1 /*****************************************************************
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2 |
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3 | Platinum - Task Manager
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4 |
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5 | Copyright (c) 2004-2008, Plutinosoft, LLC.
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6 | All rights reserved.
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7 | http://www.plutinosoft.com
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8 |
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9 | This program is free software; you can redistribute it and/or
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10 | modify it under the terms of the GNU General Public License
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11 | as published by the Free Software Foundation; either version 2
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12 | of the License, or (at your option) any later version.
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13 |
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14 | OEMs, ISVs, VARs and other distributors that combine and
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15 | distribute commercially licensed software with Platinum software
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16 | and do not wish to distribute the source code for the commercially
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17 | licensed software under version 2, or (at your option) any later
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18 | version, of the GNU General Public License (the "GPL") must enter
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19 | into a commercial license agreement with Plutinosoft, LLC.
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20 |
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21 | This program is distributed in the hope that it will be useful,
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22 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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24 | GNU General Public License for more details.
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25 |
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26 | You should have received a copy of the GNU General Public License
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27 | along with this program; see the file LICENSE.txt. If not, write to
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28 | the Free Software Foundation, Inc.,
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29 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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30 | http://www.gnu.org/licenses/gpl-2.0.html
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31 |
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32 ****************************************************************/
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33
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34 /*----------------------------------------------------------------------
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35 | includes
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36 +---------------------------------------------------------------------*/
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37 #include "PltTaskManager.h"
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38 #include "PltThreadTask.h"
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39
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40 NPT_SET_LOCAL_LOGGER("platinum.core.taskmanager")
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41
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42 /*----------------------------------------------------------------------
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43 | PLT_TaskManager::PLT_TaskManager
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44 +---------------------------------------------------------------------*/
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45 PLT_TaskManager::PLT_TaskManager(NPT_Cardinal max_items /* = 0 */) :
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46 m_Queue(max_items?new NPT_Queue<int>(max_items):NULL)
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47 {
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48 }
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49
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50 /*----------------------------------------------------------------------
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51 | PLT_TaskManager::~PLT_TaskManager
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52 +---------------------------------------------------------------------*/
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53 PLT_TaskManager::~PLT_TaskManager()
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54 {
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55 StopAllTasks();
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56 }
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57
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58 /*----------------------------------------------------------------------
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59 | PLT_TaskManager::StartTask
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60 +---------------------------------------------------------------------*/
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61 NPT_Result
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62 PLT_TaskManager::StartTask(PLT_ThreadTask* task,
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63 NPT_TimeInterval* delay /* = NULL*/,
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64 bool auto_destroy /* = true */)
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65 {
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66 return task->Start(this, delay, auto_destroy);
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67 }
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68
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69 /*----------------------------------------------------------------------
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70 | PLT_TaskManager::StopAllTasks
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71 +---------------------------------------------------------------------*/
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72 NPT_Result
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73 PLT_TaskManager::StopAllTasks()
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74 {
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75 // unblock the queue if any
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76 if (m_Queue) {
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77 NPT_Queue<int>* queue = m_Queue;
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78 m_Queue = NULL;
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79 delete queue;
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80 }
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81
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82 // stop all tasks first but don't block
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83 // otherwise when RemoveTask is called by PLT_ThreadTask::Run
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84 // it will deadlock with m_TasksLock
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85 {
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86 NPT_AutoLock lock(m_TasksLock);
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87 NPT_List<PLT_ThreadTask*>::Iterator task = m_Tasks.GetFirstItem();
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88 while (task) {
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89 (*task)->Stop(false);
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90 ++task;
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91 }
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92 }
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93
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94 // then wait for list to become empty
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95 // as tasks remove themselves from the list
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96 while (1) {
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97 {
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98 NPT_AutoLock lock(m_TasksLock);
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99 if (m_Tasks.GetItemCount() == 0)
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100 return NPT_SUCCESS;
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101 }
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102
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103 NPT_System::Sleep(NPT_TimeInterval(0, 10000));
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104 }
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105
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106 return NPT_SUCCESS;
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107 }
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108
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109 /*----------------------------------------------------------------------
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110 | PLT_TaskManager::AddTask
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111 +---------------------------------------------------------------------*/
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112 NPT_Result
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113 PLT_TaskManager::AddTask(PLT_ThreadTask* task)
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114 {
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115 if (m_Queue) {
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116 NPT_CHECK_SEVERE(m_Queue->Push(new int));
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117 }
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118
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119 {
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120 NPT_AutoLock lock(m_TasksLock);
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121 return m_Tasks.Add(task);
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122 }
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123 }
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124
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125 /*----------------------------------------------------------------------
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126 | PLT_TaskManager::RemoveTask
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127 +---------------------------------------------------------------------*/
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128 // called by a PLT_ThreadTask::Run when done
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129 NPT_Result
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130 PLT_TaskManager::RemoveTask(PLT_ThreadTask* task)
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131 {
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132 if (m_Queue) {
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133 int* val = NULL;
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134 if (NPT_SUCCEEDED(m_Queue->Pop(val)))
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135 delete val;
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136 }
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137
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138 {
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139 NPT_AutoLock lock(m_TasksLock);
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140 m_Tasks.Remove(task);
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141 }
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142
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143 // cleanup task only if auto-destroy flag was set
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144 if (task->m_AutoDestroy) delete task;
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145
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146 return NPT_SUCCESS;
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147 }