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annotate TaskManager/kernel/ppe/TaskManagerImpl.cc @ 498:bce667ff20b9 draft

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double linked HTaskInfo/HTask
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Sun, 11 Oct 2009 11:46:41 +0900
parents 3429986b8a28
children 981aa2f89a80
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1 #include <stdio.h>
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2 #include "TaskManagerImpl.h"
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3 #include "types.h"
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4 #include "error.h"
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5 #include "../sys_task/SysTask.h"
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6
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7 static HTaskPtr systask_start;
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8 static HTaskPtr systask_finish;
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9
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10 void
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11 noaction(void *p)
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12 {
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13 }
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15 TaskManagerImpl::TaskManagerImpl(int num)
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16 : machineNum(num) {
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17 activeTaskQueue = new HTaskInfo();
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18 waitTaskQueue = new HTaskInfo();
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19 htaskImpl = waitTaskQueue ; // any HTaskInfo
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20 taskQueueImpl = new TaskQueueInfo();
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21 }
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22
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23 /**
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24 * 一番最初に PPE で実行される systask_start
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25 * 一番最後に、全てのタスクの終了を待つ systask_finish
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26 * 番兵的な意味で実装
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27 */
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28 void
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29 TaskManagerImpl::systask_init(void)
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30 {
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31 systask_register();
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32
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33 systask_start = create_task(SYSTASK_START);
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34 systask_finish = create_task(SYSTASK_FINISH);
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36 systask_start->spawn();
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37
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38 // systask_finish で spawn すると
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39 // systask_finish->wait_for(systask_finish);
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40 // とかなって無限ループになるので、
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41 // これだけは明示的に append_waitTask() で
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42 append_waitTask(systask_start);
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43 }
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44
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45 HTaskPtr
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46 TaskManagerImpl::create_task(int cmd)
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47 {
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48 HTaskPtr new_task;
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49
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50 new_task = htaskImpl->create(cmd);
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51 new_task->post_func = noaction;
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52 new_task->mimpl = this;
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53
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54 return new_task;
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55 }
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56
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57 /**
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58 * task の依存関係を設定
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59 * master task が終わってから、slave task を実行するように
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60 * master->wait_for(slave);
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61 */
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62 void
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63 TaskManagerImpl::set_task_depend(HTaskPtr master, HTaskPtr slave)
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64 {
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65 TaskQueuePtr m, s;
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66
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67 m = taskQueueImpl->create(master);
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68 s = taskQueueImpl->create(slave);
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69
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70 master->wait_me->addLast(s);
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71 slave->wait_i->addLast(m);
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72 s->waiter = m;
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73 }
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74
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75 /**
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76 * タスクを実行可能キューまたは待機キューへ追加する。
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77 * 依存関係が満たされていれば active, まだだったら wait へ。
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78 * task->spawn();
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79 */
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80 void
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81 TaskManagerImpl::spawn_task(HTaskPtr task)
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82 {
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83 // waiter // master
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84 // waitee // slave
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85 if (task->wait_i->empty()) {
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86 append_activeTask(task);
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87 } else {
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88 append_waitTask(task);
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89 }
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91 systask_finish->wait_for(task);
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92 }
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93
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94 /**
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95 * Task を実行可能キューに追加する
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96 */
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97 void
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98 TaskManagerImpl::append_activeTask(HTaskPtr q)
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99 {
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100 activeTaskQueue->addLast(q);
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101 }
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102
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103 /**
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104 * タスクが実行する CPU を選択する
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105 *
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106 * 現在は CPU_PPE, CPU_SPE, SPE_ANY, SPE_0, SPE_1, ..., SPE_5
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107 * types.h に書いてます。
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108 */
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109 void
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110 TaskManagerImpl::set_task_cpu(HTaskPtr task, CPU_TYPE type)
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111 {
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112 task->cpu_type = type;
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113 }
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114
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115 /**
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116 * 終了したタスクから依存の処理とか
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117 * post_func() はこのタスクが終了したら実行する関数。
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118 *
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119 * @param [task] 終了したタスク
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120 */
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121 void
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122 TaskManagerImpl::check_task_finish(HTaskPtr me)
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123 {
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124 while(TaskQueue *p = me->wait_me->poll()) {
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125 HTaskPtr you = (HTaskPtr)p->task;
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126 TaskQueueInfo *wait_i = you->wait_i;
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127 // 相手の wait queue から自分(を指しているTaskQueue)を削除
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128 wait_i->remove(p->waiter);
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129 // queue を free する
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130 wait_i->free_(p->waiter);
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131
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132 if (wait_i->empty()) {
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133 waitTaskQueue->remove((HTaskPtr)you->task);
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134 append_activeTask((HTaskPtr)you->task);
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135 }
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136
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137 wait_i->free_(p);
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138 }
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139
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140 me->post_func(me->post_arg);
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141 htaskImpl->free_(me);
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142 }
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143
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144
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145 void
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146 TaskManagerImpl::append_waitTask(HTaskPtr q)
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147 {
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148 waitTaskQueue ->addLast(q);
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149 }
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150
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151 /**
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152 * waitQueue の中で依存関係を満たしたタスクは
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153 * activeQueue へ移す
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154 */
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155 void
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156 TaskManagerImpl::wakeup_waitTask(void)
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157 {
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158 // done in check_task_finish
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159 }
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160
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161 /* end */