1 files changed, 88 insertions, 0 deletions
diff --git a/spec/rubyspec/optional/capi/mutex_spec.rb b/spec/rubyspec/optional/capi/mutex_spec.rb
new file mode 100644
index 0000000000..dae300f002
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+++ b/spec/rubyspec/optional/capi/mutex_spec.rb
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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 true if the mutex is 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