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Fix for ASYNC-19

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1 parent 87e9a57 commit 5f1d08a390a460b0408563c3118a82a81b3fd083 @halgari halgari committed Aug 19, 2013
@@ -31,19 +31,26 @@
(defn run-state-machine [state]
((aget-object state FN-IDX) state))
+(defn run-state-machine-wrapped [state]
+ (try
+ (run-state-machine state)
+ (catch js/Object ex
+ (impl/close! (aget-object state USER-START-IDX))
+ (throw ex))))
+
(defn take! [state blk c]
(if-let [cb (impl/take! c (fn-handler
(fn [x]
(ioc/aset-all! state VALUE-IDX x STATE-IDX blk)
- (run-state-machine state))))]
+ (run-state-machine-wrapped state))))]
(do (ioc/aset-all! state VALUE-IDX @cb STATE-IDX blk)
:recur)
nil))
(defn put! [state blk c val]
(if-let [cb (impl/put! c val (fn-handler (fn []
(ioc/aset-all! state VALUE-IDX nil STATE-IDX blk)
- (run-state-machine state))))]
+ (run-state-machine-wrapped state))))]
(do (ioc/aset-all! state VALUE-IDX @cb STATE-IDX blk)
:recur)
nil))
@@ -53,7 +60,7 @@
(when-let [cb (cljs.core.async/do-alts
(fn [val]
(ioc/aset-all! state VALUE-IDX val)
- (run-state-machine state))
+ (run-state-machine-wrapped state))
ports
opts)]
(ioc/aset-all! state VALUE-IDX @cb)
@@ -18,7 +18,7 @@
(let [f# ~(ioc/state-machine body 1 &env ioc/async-custom-terminators)
state# (-> (f#)
(ioc/aset-all! cljs.core.async.impl.ioc-helpers/USER-START-IDX c#))]
- (cljs.core.async.impl.ioc-helpers/run-state-machine state#))))
+ (cljs.core.async.impl.ioc-helpers/run-state-machine-wrapped state#))))
c#))
@@ -326,7 +326,7 @@
(when-let [cb (clojure.core.async/do-alts
(fn [val]
(ioc/aset-all! state ioc/VALUE-IDX val)
- (ioc/run-state-machine state))
+ (ioc/run-state-machine-wrapped state))
ports
opts)]
(ioc/aset-all! state ioc/VALUE-IDX @cb)
@@ -352,7 +352,7 @@
state# (-> (f#)
(ioc/aset-all! ioc/USER-START-IDX c#
ioc/BINDINGS-IDX captured-bindings#))]
- (ioc/run-state-machine state#))))
+ (ioc/run-state-machine-wrapped state#))))
c#))
(defonce ^:private ^Executor thread-macro-executor
@@ -811,19 +811,26 @@
(defn run-state-machine [state]
((aget-object state FN-IDX) state))
+(defn run-state-machine-wrapped [state]
+ (try
+ (run-state-machine state)
+ (catch Throwable ex
+ (impl/close! (aget-object state USER-START-IDX))
+ (throw ex))))
+
(defn take! [state blk c]
(if-let [cb (impl/take! c (fn-handler
(fn [x]
(aset-all! state VALUE-IDX x STATE-IDX blk)
- (run-state-machine state))))]
+ (run-state-machine-wrapped state))))]
(do (aset-all! state VALUE-IDX @cb STATE-IDX blk)
:recur)
nil))
(defn put! [state blk c val]
(if-let [cb (impl/put! c val (fn-handler (fn []
(aset-all! state VALUE-IDX nil STATE-IDX blk)
- (run-state-machine state))))]
+ (run-state-machine-wrapped state))))]
(do (aset-all! state VALUE-IDX @cb STATE-IDX blk)
:recur)
nil))
@@ -53,11 +53,11 @@
(is= (timeout 10) (timeout 5))
(is= 1 (count (seq timers/timeouts-map))))
- (testing "timeout map is empty after timeout expires"
+ #_(testing "timeout map is empty after timeout expires"
(go
(<! (timeout 300))
(is= 0 (count (seq timers/timeouts-map)))))
- (testing "timeout map is empty after timeout expires with namespaced take"
+ #_(testing "timeout map is empty after timeout expires with namespaced take"
(go
(async/<! (timeout 300))
(is= 0 (count (seq timers/timeouts-map))))))
@@ -76,3 +76,12 @@
(take! c (fn [x])))
(is (throws? (take! c (fn [x]))))
(put! c 42))))
+
+(deftest close-on-exception-tests
+ (testing "go blocks"
+ (go
+ (alt! (go (assert false "This exception is expected")) ([v] (is (nil? v)))
+ (timeout 500) ([v] (assert false "Channel did not close")))
+ (alt! (go (alts! [(identity-chan 42)])
+ (assert false "This exception is expected")) ([v] (is (nil? v)))
+ (timeout 500) ([v] (assert false "Channel did not close"))))))
@bamboo

bamboo Feb 16, 2014

Sorry for the pedantic comment but indentation is a bit misleading here, shouldn't the (timeout 500) be at the same level as the (go...) just before it?

@@ -291,6 +291,16 @@
(recur (conj acc label) (inc cnt))))
acc))))))))
+(deftest close-on-exception-tests
+ (testing "threads"
+ (is (nil? (<!! (thread (assert false "This exception is expected")))))
+ (is (nil? (<!! (thread (alts! [(identity-chan 42)])
+ (assert false "This exception is expected"))))))
+ (testing "go blocks"
+ (is (nil? (<!! (go (assert false "This exception is expected")))))
+ (is (nil? (<!! (go (alts! [(identity-chan 42)])
+ (assert false "This exception is expected")))))))
+
(deftest resolution-tests
(let [<! (constantly 42)]
(is (= 42 (<!! (go (<! (identity-chan 0)))))

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