properly close signal even on cancel

datastore/sharedds.nim

@@ -52,9 +52,12 @@ method get*(
   without ret =? newThreadResult(DataBuffer), err:
     return failure(err)
 
-  get(ret, self.tds, key)
-  await wait(ret[].signal)
-  ret[].signal.close()
+  try:
+    get(ret, self.tds, key)
+    await wait(ret[].signal)
+  finally:
+    echo "closing signal"
+    ret[].signal.close()
 
   echo "\nSharedDataStore:put:value: ", ret[].repr
   let data = ret[].value.toSeq(byte)
@@ -70,10 +73,12 @@ method put*(
     return failure(err)
 
   echo "res: ", ret
-  put(ret, self.tds, key, data)
-  await wait(ret[].signal)
-  echo "closing signal"
-  ret[].signal.close()
+  try:
+    put(ret, self.tds, key, data)
+    await wait(ret[].signal)
+  finally:
+    echo "closing signal"
+    ret[].signal.close()
 
   echo "\nSharedDataStore:put:value: ", ret[].repr
   return success()
@@ -103,12 +108,14 @@ proc newSharedDataStore*(
   without res =? newThreadResult(ThreadDatastorePtr), err:
     return failure(err)
   
-  res[].value = newSharedPtr(ThreadDatastore)
-
-  echo "\nnewDataStore: threadId:", getThreadId()
-  res.createThreadDatastore(backend)
-  await wait(res[].signal)
-  res[].signal.close()
+  try:
+    res[].value = newSharedPtr(ThreadDatastore)
+    echo "\nnewDataStore: threadId:", getThreadId()
+    res.createThreadDatastore(backend)
+    await wait(res[].signal)
+  finally:
+    echo "closing signal"
+    res[].signal.close()
 
   echo "\nnewSharedDataStore:state: ", res[].state.repr
   echo "\nnewSharedDataStore:value: ", res[].value[].backend.repr

datastore/threadbackend.nim

@@ -68,10 +68,6 @@ var
   fsDatastore {.threadvar.}: FSDatastore ##\
     ## TODO: figure out a better way to capture this?
 
-proc `=destroy`*[T](x: var ThreadResult[T]) =
-  when T isnot void:
-    x.value.`=destroy`
-
 proc newThreadResult*[T](tp: typedesc[T]): Result[TResult[T], ref CatchableError] =
   let res = newSharedPtr(ThreadResult[T])
   let signal = ThreadSignalPtr.new()

tests/datastore/testsharedds.nim

@@ -31,10 +31,8 @@ suite "Test Basic SharedDatastore":
 
     echo "\n\n=== put ==="
     let key1 = Key.init("/a").tryGet
-    # let res1 = await sds.put(key1, "value for 1".toBytes())
-    let res1 = sds.put(key1, "value for 1".toBytes())
-    res1.cancel()
-    echo "res1: ", res1.repr
+    let res1 = await sds.put(key1, "value for 1".toBytes())
+    print "res1: ", res1
 
     echo "\n\n=== get ==="
     let res2 = await sds.get(key1)
@@ -44,6 +42,12 @@ suite "Test Basic SharedDatastore":
       val &= char(c)
     print "get res2: ", $val
 
+    echo "\n\n=== put cancel ==="
+    # let res1 = await sds.put(key1, "value for 1".toBytes())
+    let res3 = sds.put(key1, "value for 1".toBytes())
+    res3.cancel()
+    # print "res3: ", res3
+
 # suite "Test Basic FSDatastore":
 #   let
 #     path = currentSourcePath() # get this file's name