Example contributed by Ross Anderson.

examples/sub_threads.lua

@@ -0,0 +1,53 @@
+-- Copyright (c) 2011 by Ross Anderson <ross_j_anderson@yahoo.com>
+--
+-- Permission is hereby granted, free of charge, to any person obtaining a copy
+-- of this software and associated documentation files (the "Software"), to deal
+-- in the Software without restriction, including without limitation the rights
+-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+-- copies of the Software, and to permit persons to whom the Software is
+-- furnished to do so, subject to the following conditions:
+--
+-- The above copyright notice and this permission notice shall be included in
+-- all copies or substantial portions of the Software.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+-- THE SOFTWARE.
+
+local llthreads = require"llthreads"
+ 
+--- level 0 string literal enclosure [[  ]]
+local thread_code = [[  
+    print("CHILD: received params:", ...)    
+    local llthreads = require"llthreads" -- need to re-declare under this scope
+    local t = {} -- thread storage table
+    -- create a new child thread - with level 1 literal string [=[ ]=] enclosures, level 2 would be [==[ ]==]
+    local executed_child_code = [=[ 
+        return 'Hello from child sub-thread, new input params:', ... 
+    ]=]
+    -- first child sub-thread
+    local thread1 = llthreads.new(executed_child_code , "number:", 1001, "nil:", nil, "bool:", true) 
+    assert(thread1:start()) -- start new child sub-thread
+    table.insert(t, 1, thread1) -- insert thread into thread table
+    -- second child sub-thread
+    local thread2 = llthreads.new(executed_child_code , "number:", 1002, "nil:", nil, "bool:", true) 
+    assert(thread2:start()) -- start new child sub-thread
+    table.insert(t, 1, thread2) -- insert thread into thread table
+    -- wait for all child sub-threads to complete before returning to root
+    while true do        
+        print("PARENT: child returned: ", t[1]:join()) 
+        table.remove(t,1)
+        if (#t <= 0) then break end
+    end
+    return ...  -- return the parents' input params back to the root
+]]
+
+-- create child thread.
+local thread = llthreads.new(thread_code, "number:", 1234, "nil:", nil, "bool:", true)
+-- start joinable child thread.
+assert(thread:start())
+print("Root: child returned: ", thread:join())