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178c1b0922
* Enables Mutex to be used as synchronization between multiple Fibers of the same Thread. * With a Fiber scheduler we can yield to another Fiber on contended Mutex#lock instead of blocking the entire thread. * This also makes the behavior of Mutex consistent across CRuby, JRuby and TruffleRuby. * [Feature #16792]
55 lines
968 B
Ruby
55 lines
968 B
Ruby
require_relative '../../spec_helper'
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describe "Mutex#owned?" do
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describe "when unlocked" do
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it "returns false" do
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m = Mutex.new
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m.owned?.should be_false
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end
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end
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describe "when locked by the current thread" do
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it "returns true" do
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m = Mutex.new
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m.lock
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m.owned?.should be_true
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end
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end
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describe "when locked by another thread" do
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before :each do
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@checked = false
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end
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after :each do
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@checked = true
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@th.join
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end
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it "returns false" do
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m = Mutex.new
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locked = false
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@th = Thread.new do
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m.lock
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locked = true
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Thread.pass until @checked
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end
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Thread.pass until locked
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m.owned?.should be_false
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end
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end
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ruby_version_is "2.8" do
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it "is held per Fiber" do
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m = Mutex.new
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m.lock
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Fiber.new do
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m.locked?.should == true
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m.owned?.should == false
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end.resume
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end
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end
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end
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