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require File.expand_path('../spec_helper', __FILE__)
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
start = Time.now
@s.rb_mutex_sleep(@m, 0.1)
(Time.now - start).should be_close(0.1, 0.2)
@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
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