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annotate src/parallel_execution/SynchronizedQueue.cbc @ 496:809974b25ecb

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Genrate stub for MultiDimIterator
author Tatsuki IHA <innparusu@cr.ie.u-ryukyu.ac.jp>
date Mon, 01 Jan 2018 06:37:29 +0900
parents f985815ad032
children 98c5235b3ecb
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1 #include "../context.h"
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2 #interface "Queue.h"
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3 #interface "Atomic.h"
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4
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5 #include <stdio.h>
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6
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7 /*
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8 * Non-blocking queue of Paper: Simple, Fast, and Practical Non-Blocking and Blocking Concurrent Queue Algorithms(https://www.research.ibm.com/people/m/michael/podc-1996.pdf).
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9 */
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10
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11 Queue* createSynchronizedQueue(struct Context* context) {
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12 struct Queue* queue = new Queue();
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13 struct SynchronizedQueue* synchronizedQueue = new SynchronizedQueue();
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14 synchronizedQueue->top = new Element();
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15 synchronizedQueue->top->next = NULL;
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16 synchronizedQueue->last = synchronizedQueue->top;
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17 synchronizedQueue->atomic = createAtomicReference(context);
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18 queue->queue = (union Data*)synchronizedQueue;
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19 queue->take = C_takeSynchronizedQueue;
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20 queue->put = C_putSynchronizedQueue;
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21 queue->isEmpty = C_isEmptySynchronizedQueue;
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22 queue->clear = C_clearSynchronizedQueue;
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23 return queue;
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24 }
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25
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26 __code clearSynchronizedQueue(struct SynchronizedQueue* queue, __code next(...)) {
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27 struct Element* top = queue->top;
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28 struct Atomic* atomic = queue->atomic;
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29 goto atomic->checkAndSet(&queue->top, top, NULL, next(...), clearSynchronizedQueue);
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30 }
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31
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32 __code putSynchronizedQueue(struct SynchronizedQueue* queue, union Data* data, __code next(...)) {
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33 Element* element = new Element();
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34 element->data = data;
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35 element->next = NULL;
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36 Element* last = queue->last;
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37 Element* nextElement = last->next;
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38 if (last != queue->last) {
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39 goto putSynchronizedQueue();
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40 }
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41 if (nextElement == NULL) {
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42 struct Atomic* atomic = queue->atomic;
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43 goto atomic->checkAndSet(&last->next, nextElement, element, next(...), putSynchronizedQueue);
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44 } else {
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45 struct Atomic* atomic = queue->atomic;
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46 goto atomic->checkAndSet(&queue->last, last, nextElement, putSynchronizedQueue, putSynchronizedQueue);
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47 }
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48 }
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49
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50 __code takeSynchronizedQueue(struct SynchronizedQueue* queue, __code next(union Data* data, ...)) {
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51 struct Element* top = queue->top;
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52 struct Element* last = queue->last;
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53 struct Element* nextElement = top->next;
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54 if (top != queue->top) {
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55 goto takeSynchronizedQueue();
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56 }
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57 if (top == last) {
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58 if (nextElement != NULL) {
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59 struct Atomic* atomic = queue->atomic;
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60 goto atomic->checkAndSet(&queue->last, last, nextElement, takeSynchronizedQueue, takeSynchronizedQueue);
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61 }
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62 } else {
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63 struct Atomic* atomic = queue->atomic;
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64 goto atomic->checkAndSet(&queue->top, top, nextElement, takeSynchronizedQueue1, takeSynchronizedQueue);
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65 }
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66 goto takeSynchronizedQueue();
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67 }
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69 __code takeSynchronizedQueue1(struct SynchronizedQueue* queue, __code next(union Data* data, ...), struct Element* nextElement) {
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70 data = nextElement->data;
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71 goto next(data, ...);
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72 }
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74 __code takeSynchronizedQueue1_stub(struct Context* context) {
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75 SynchronizedQueue* queue = (SynchronizedQueue*)GearImpl(context, Queue, queue);
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76 enum Code next = Gearef(context, Queue)->next;
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77 Data** O_data = &Gearef(context, Queue)->data;
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78 goto takeSynchronizedQueue1(context,
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79 queue,
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80 next,
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81 O_data,
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82 (struct Element*)Gearef(context, Atomic)->newData);
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83 }
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84
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85 __code isEmptySynchronizedQueue(struct SynchronizedQueue* queue, __code next(...), __code whenEmpty(...)) {
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86 struct Element* top = queue->top;
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87 struct Element* last = queue->last;
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88 struct Element* nextElement = top->next;
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89 if (top != queue->top) {
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90 goto isEmptySynchronizedQueue();
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91 }
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92 if (top == last && nextElement == NULL) {
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93 goto whenEmpty(...);
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94 }
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95 goto next(...);
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96 }