Factor out some new libraries

	word64-map:
		Data.Word64Map
	network-addr:
		Network.Address
	tox-crypto:
		Crypto.Tox
	lifted-concurrent:
		Control.Concurrent.Lifted.Instrument
		Control.Concurrent.Async.Lifted.Instrument
	psq-wrap:
		Data.Wrapper.PSQInt
		Data.Wrapper.PSQ
	minmax-psq:
		Data.MinMaxPSQ
        tasks:
                Control.Concurrent.Tasks
	kad:
		Network.Kademlia
		Network.Kademlia.Bootstrap
		Network.Kademlia.Routing
		Network.Kademlia.CommonAPI
		Network.Kademlia.Persistence
		Network.Kademlia.Search

5 files changed, 110 insertions, 0 deletions

diff --git a/tasks/CHANGELOG.md b/tasks/CHANGELOG.md
new file mode 100644
index 00000000..1ae925ad
--- /dev/null
+++ b/tasks/CHANGELOG.md
@@ -0,0 +1,5 @@
+# Revision history for tasks
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.
diff --git a/tasks/LICENSE b/tasks/LICENSE
new file mode 100644
index 00000000..e8eaef49
--- /dev/null
+++ b/tasks/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c) 2019, James Crayne
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of James Crayne nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/tasks/Setup.hs b/tasks/Setup.hs
new file mode 100644
index 00000000..9a994af6
--- /dev/null
+++ b/tasks/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/tasks/src/Control/Concurrent/Tasks.hs b/tasks/src/Control/Concurrent/Tasks.hs
new file mode 100644
index 00000000..da2e589e
--- /dev/null
+++ b/tasks/src/Control/Concurrent/Tasks.hs
@@ -0,0 +1,44 @@
+{-# LANGUAGE CPP #-}
+module Control.Concurrent.Tasks where
+
+import Control.Concurrent.STM
+import Control.Exception
+import Data.Function
+import Data.List
+#ifdef THREAD_DEBUG
+import Control.Concurrent.Lifted.Instrument
+#else
+import Control.Concurrent.Lifted
+import GHC.Conc                  (labelThread)
+#endif
+
+newtype TaskGroup = TaskGroup
+    { taskQueue :: TChan (String,IO ())
+    }
+
+withTaskGroup :: String -> Int -> (TaskGroup -> IO ()) -> IO ()
+withTaskGroup glabel numslots action = do
+    tg <- atomically $ newTChan
+    cnt <- atomically $ newTVar 0
+    thread <- forkIO $ do
+        myThreadId >>= flip labelThread glabel
+        fix $ \again -> do
+            (slot, (lbl,task)) <- atomically $ do
+                slot <- readTVar cnt
+                check (slot < numslots)
+                writeTVar cnt (succ slot)
+                t <- readTChan tg
+                return (slot,t)
+            _ <- fork $ do
+                myThreadId >>= flip labelThread (intercalate "." [glabel,show slot,lbl])
+                task `catch` (\(SomeException e) -> return ())
+                atomically $ modifyTVar' cnt pred
+            again
+    action (TaskGroup tg) `onException` killThread thread
+    atomically $ do
+        isEmptyTChan tg >>= check
+        readTVar cnt >>= check . (== 0)
+    killThread thread
+
+forkTask :: TaskGroup -> String -> IO () -> IO ()
+forkTask (TaskGroup q) lbl action = atomically $ writeTChan q (lbl,action)
diff --git a/tasks/tasks.cabal b/tasks/tasks.cabal
new file mode 100644
index 00000000..e7ec8d63
--- /dev/null
+++ b/tasks/tasks.cabal
@@ -0,0 +1,29 @@
+-- Initial tasks.cabal generated by cabal init.  For further documentation,
+--  see http://haskell.org/cabal/users-guide/
+
+name:                tasks
+version:             0.1.0.0
+-- synopsis:
+-- description:
+license:             BSD3
+license-file:        LICENSE
+author:              James Crayne
+maintainer:          jim.crayne@gmail.com
+-- copyright:
+-- category:
+build-type:          Simple
+extra-source-files:  CHANGELOG.md
+cabal-version:       >=1.10
+
+library
+  exposed-modules:     Control.Concurrent.Tasks
+  -- other-modules:
+  other-extensions:    CPP
+  build-depends:
+          base
+        , stm
+        , lifted-concurrent
+        , lifted-base
+  cpp-options: -DTHREAD_DEBUG
+  hs-source-dirs:      src
+  default-language:    Haskell2010