removed tryRecv with Option[T]

threading/channels.nim

@@ -100,7 +100,7 @@ runnableExamples("--threads:on --gc:orc"):
 when not (defined(gcArc) or defined(gcOrc) or defined(gcAtomicArc) or defined(nimdoc)):
   {.error: "This module requires one of --mm:arc / --mm:atomicArc / --mm:orc compilation flags".}
 
-import std/[locks, isolation, atomics, options]
+import std/[locks, isolation, atomics]
 
 # Channel
 # ------------------------------------------------------------------------------
@@ -256,14 +256,15 @@ type
   Chan*[T] = object ## Typed channel
     d: ChannelRaw
 
-proc tryRecv*[T](c: Chan[T]): Option[T] {.inline, raises: [].}
+proc tryRecv*[T](c: Chan[T], dst: var T): bool {.inline, raises: [].}
 
-template frees(c) =
+template frees[T](c: Chan[T]) =
   if c.d != nil:
     # this `fetchSub` returns current val then subs
     # so count == 0 means we're the last
     while true:
-      if c.tryRecv().isNone:
+      var msg: T
+      if not c.tryRecv(msg):
         break
     if c.d.atomicCounter.fetchSub(1, moAcquireRelease) == 0:
       freeChannel(c.d)
@@ -348,22 +349,6 @@ proc tryRecv*[T](c: Chan[T], dst: var T): bool {.inline.} =
   ## Returns `false` and does not change `dist` if no message was received.
   channelReceive(c.d, dst.addr, sizeof(T), false)
 
-proc tryRecv*[T](c: Chan[T]): Option[T] {.inline.} =
-  ## Tries to receive a message from the channel `c`.
-  ##
-  ## Doesn't block waiting for messages in the channel to become available.
-  ## Instead returns after an attempt to receive a message was made.
-  ##
-  ## .. warning:: In high-concurrency situations, consider using an exponential
-  ##    backoff strategy to reduce contention and improve the success rate of
-  ##    operations.
-  var dst: T
-  let dataAvailable = tryRecv(c, dst)
-  if dataAvailable:
-    result = some(dst)
-  else:
-    result = none(T)
-
 proc send*[T](c: Chan[T], src: sink Isolated[T]) {.inline.} =
   ## Sends the message `src` to the channel `c`.
   ## This blocks the sending thread until `src` was successfully sent.