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13514
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1 /*
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2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
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3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
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4 * redistribute it and/or modify it under the terms of the:
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5 *
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6 * Eclipse Public License version 1.0
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7 * GNU General Public License version 2
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8 * GNU Lesser General Public License version 2.1
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9 */
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10 package com.oracle.truffle.ruby.nodes.core;
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11
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12 import com.oracle.truffle.api.*;
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13 import com.oracle.truffle.api.dsl.*;
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14 import com.oracle.truffle.ruby.runtime.*;
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15 import com.oracle.truffle.ruby.runtime.core.*;
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16
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17 @CoreClass(name = "Fiber")
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18 public abstract class FiberNodes {
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19
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20 @CoreMethod(names = "resume", isSplatted = true)
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21 public abstract static class ResumeNode extends CoreMethodNode {
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22
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23 public ResumeNode(RubyContext context, SourceSection sourceSection) {
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24 super(context, sourceSection);
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25 }
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26
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27 public ResumeNode(ResumeNode prev) {
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28 super(prev);
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29 }
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30
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31 @Specialization
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32 public Object resume(RubyFiber fiberBeingResumed, Object[] args) {
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33 final RubyFiber sendingFiber = getContext().getFiberManager().getCurrentFiber();
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34
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35 fiberBeingResumed.resume(sendingFiber, args);
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36
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37 return sendingFiber.waitForResume();
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38 }
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39
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40 }
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41
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42 @CoreMethod(names = "initialize", needsBlock = true, maxArgs = 0)
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43 public abstract static class InitializeNode extends CoreMethodNode {
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44
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45 public InitializeNode(RubyContext context, SourceSection sourceSection) {
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46 super(context, sourceSection);
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47 }
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48
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49 public InitializeNode(InitializeNode prev) {
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50 super(prev);
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51 }
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52
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53 @Specialization
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54 public NilPlaceholder initialize(RubyFiber fiber, RubyProc block) {
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55 fiber.initialize(block);
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56 return NilPlaceholder.INSTANCE;
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57 }
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58
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59 }
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60
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61 @CoreMethod(names = "yield", isModuleMethod = true, needsSelf = false, isSplatted = true)
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62 public abstract static class YieldNode extends CoreMethodNode {
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63
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64 public YieldNode(RubyContext context, SourceSection sourceSection) {
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65 super(context, sourceSection);
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66 }
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67
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68 public YieldNode(YieldNode prev) {
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69 super(prev);
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70 }
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71
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72 @Specialization
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73 public Object yield(Object[] args) {
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74 final RubyFiber yieldingFiber = getContext().getFiberManager().getCurrentFiber();
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75 final RubyFiber fiberYieldedTo = yieldingFiber.lastResumedByFiber;
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76
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77 fiberYieldedTo.resume(yieldingFiber, args);
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78
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79 return yieldingFiber.waitForResume();
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80 }
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81
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82 }
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83
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84 }
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