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annotate TaskManager/kernel/ppe/TaskManagerImpl.cc @ 481:4896dffad67c

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Double linked list modification done (tested on Mac OS X)
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Mon, 05 Oct 2009 16:46:46 +0900
parents 46464727d825
children 0b933bef0328
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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 TaskQueueInfo();
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18 waitTaskQueue = new TaskQueueInfo();
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19 taskQueueImpl = new TaskQueueInfo();
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20 }
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21
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22 /**
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23 * 一番最初に PPE で実行される systask_start
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24 * 一番最後に、全てのタスクの終了を待つ systask_finish
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25 * 番兵的な意味で実装
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26 */
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27 void
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28 TaskManagerImpl::systask_init(void)
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29 {
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30 systask_register();
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31
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32 systask_start = create_task(SYSTASK_START);
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33 systask_finish = create_task(SYSTASK_FINISH);
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34
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35 systask_start->spawn();
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36
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37 // systask_finish で spawn すると
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38 // systask_finish->wait_for(systask_finish);
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39 // とかなって無限ループになるので、
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40 // これだけは明示的に append_waitTask() で
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41 append_waitTask(systask_finish);
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42 }
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43
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44 HTaskPtr
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45 TaskManagerImpl::create_task(int cmd)
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46 {
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47 HTaskPtr new_task;
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49 new_task = htaskImpl->create(cmd);
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50 new_task->post_func = noaction;
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51 new_task->mimpl = this;
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52
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53 return new_task;
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54 }
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55
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56 /**
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57 * task の依存関係を設定
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58 * master task が終わってから、slave task を実行するように
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59 * master->wait_for(slave);
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60 */
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61 void
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62 TaskManagerImpl::set_task_depend(HTaskPtr master, HTaskPtr slave)
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63 {
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64 TaskQueuePtr m, s;
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65
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66 m = taskQueueImpl->create(master);
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67 s = taskQueueImpl->create(slave);
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69 master->wait_me->addLast(s);
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70 slave->wait_i->addLast(m);
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71 s->waiter = m;
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72 }
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73
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74 /**
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75 * 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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76 * 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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77 * task->spawn();
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78 */
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79 void
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80 TaskManagerImpl::spawn_task(HTaskPtr task)
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81 {
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82 // waiter // master
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83 // waitee // slave
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84 if (task->wait_i->empty()) {
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85 append_activeTask(task);
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86 } else {
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87 append_waitTask(task);
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88 }
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90 systask_finish->wait_for(task);
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91 }
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93 /**
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94 * Task を実行可能キューに追加する
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95 */
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96 void
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97 TaskManagerImpl::append_activeTask(HTaskPtr task)
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98 {
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99 TaskQueuePtr q = taskQueueImpl->create(task);
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100 activeTaskQueue->addLast(q);
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101 }
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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 task)
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123 {
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124 while(TaskQueue *p = task->wait_me->poll()) {
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125 HTaskPtr htask = (HTaskPtr)p->task;
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126 TaskQueueInfo *wait_i = htask->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
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130 // queue を free する
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131 wait_i->free(p->waiter);
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132 wait_i->free(p);
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133 }
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134
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135 task->post_func(task->post_arg);
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136 htaskImpl->free(task);
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137 }
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139
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140 void
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141 TaskManagerImpl::append_waitTask(HTaskPtr task)
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142 {
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143 TaskQueuePtr q = taskQueueImpl->create(task);
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144 waitTaskQueue ->addLast(q);
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145 }
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146
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147 /**
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148 * waitQueue の中で依存関係を満たしたタスクは
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149 * activeQueue へ移す
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150 */
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151 void
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152 TaskManagerImpl::wakeup_waitTask(void)
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153 {
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154 while (TaskQueuePtr p = waitTaskQueue->poll()) {
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155 HTaskPtr task = (HTaskPtr)p->task;
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156 if (task->wait_i->empty()) {
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157 activeTaskQueue->addLast(p);
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158 }
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159 }
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160 }
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161
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162 /* end */