require_relative 'spec_helper' load_extension("mutex") describe "C-API Mutex functions" do before :each do @s = CApiMutexSpecs.new @m = Mutex.new end describe "rb_mutex_new" do it "creates a new mutex" do @s.rb_mutex_new.should be_an_instance_of(Mutex) end end describe "rb_mutex_locked_p" do it "returns false if the mutex is not locked" do @s.rb_mutex_locked_p(@m).should be_false end it "returns true if the mutex is locked" do @m.lock @s.rb_mutex_locked_p(@m).should be_true end end describe "rb_mutex_trylock" do it "locks the mutex if not locked" do @s.rb_mutex_trylock(@m).should be_true @m.locked?.should be_true end it "returns false if the mutex is already locked" do @m.lock @s.rb_mutex_trylock(@m).should be_false @m.locked?.should be_true end end describe "rb_mutex_lock" do it "returns when the mutex isn't locked" do @s.rb_mutex_lock(@m).should == @m @m.locked?.should be_true end it "throws an exception when already locked in the same thread" do @m.lock lambda { @s.rb_mutex_lock(@m) }.should raise_error(ThreadError) @m.locked?.should be_true end end describe "rb_mutex_unlock" do it "raises an exception when not locked" do lambda { @s.rb_mutex_unlock(@m) }.should raise_error(ThreadError) @m.locked?.should be_false end it "unlocks the mutex when locked" do @m.lock @s.rb_mutex_unlock(@m).should == @m @m.locked?.should be_false end end describe "rb_mutex_sleep" do it "throws an exception when the mutex is not locked" do lambda { @s.rb_mutex_sleep(@m, 0.1) }.should raise_error(ThreadError) @m.locked?.should be_false end it "sleeps when the mutex is locked" do @m.lock t1 = Process.clock_gettime(Process::CLOCK_MONOTONIC) @s.rb_mutex_sleep(@m, 0.001) t2 = Process.clock_gettime(Process::CLOCK_MONOTONIC) (t2 - t1).should >= 0 @m.locked?.should be_true end end describe "rb_mutex_synchronize" do it "calls the function while the mutex is locked" do callback = lambda { @m.locked?.should be_true } @s.rb_mutex_synchronize(@m, callback) end end end