add threading examples

examples/python/threading/callback.kg

@@ -0,0 +1,7 @@
+.py("callback.py")
+
+fn::{[a];a::x*x;.p(a);a}
+
+.p("running callback in parallel processes: ")
+runit(!10;fn)
+

examples/python/threading/callback.py

@@ -0,0 +1,16 @@
+from multiprocessing.pool import ThreadPool
+from klongpy.core import KGFnWrapper
+import time
+
+def use_klongpy(numbers, fn):
+    """
+    This runs in the same process as the KlongInterpreter, so we can use the fn directly.
+    """
+    return fn(numbers)
+
+
+def runit(klong, numbers, fn):
+    """Apply the square function in parallel to a list of numbers."""
+    fn = KGFnWrapper(klong, fn) # TODO: this should already come wrapped from the interpreter
+    with ThreadPool() as pool:
+        return pool.apply_async(use_klongpy, (numbers, fn,)).get()

examples/python/threading/callback_async.kg

@@ -0,0 +1,14 @@
+.py("callback_async.py")
+
+cb::{.d("callback called: ");.p(x)}
+fn::{x*x}
+
+t::0
+.tcb::{.d("counter: ");.p(t);t::t+1}
+th::.timer("counter";0.25;tcb)
+
+.p("running callback in parallel processes: ")
+runit(!10;fn;cb)
+.d("doing other work: ");.p(24*24)
+
+wait()

examples/python/threading/callback_async.py

@@ -0,0 +1,24 @@
+from multiprocessing.pool import ThreadPool
+from klongpy.core import KGFnWrapper
+import time
+
+def use_klongpy(numbers, fn):
+    """
+    This runs in the same process as the KlongInterpreter, so we can use the fn directly.
+    """
+    time.sleep(1)
+    print("done sleeping")
+    return fn(numbers)
+
+pool = ThreadPool()
+
+def runit(klong, numbers, fn, cb):
+    """Apply the square function in parallel to a list of numbers."""
+    fn = KGFnWrapper(klong, fn) # TODO: this should already come wrapped from the interpreter
+    cb = KGFnWrapper(klong, cb)
+    # with ThreadPool() as pool:
+    return pool.apply_async(use_klongpy, (numbers, fn,), callback=cb)
+
+def wait():
+    pool.close()
+    pool.join()

examples/python/threading/pool.kg

@@ -0,0 +1,3 @@
+.py("pool.py")
+
+.d("parallel squared numbers: ");.p(runit(!10))

examples/python/threading/pool.py

@@ -0,0 +1,12 @@
+from multiprocessing.pool import ThreadPool
+
+def square(numbers):
+    """Function to square a number."""
+    return [n * n for n in numbers]
+
+
+def runit(numbers):
+    """Apply the square function in parallel to a list of numbers."""
+    with ThreadPool() as pool:
+        return pool.apply_async(square, (numbers,)).get()
+

examples/python/threading/pool_async.kg

@@ -0,0 +1,11 @@
+.py("pool.py")
+
+.p("async parallel squared numbers: ");
+
+:" create an async wrapper for the parallel task "
+cb::{.d("done: ");.p(x)}
+fn::{x*x}
+arunit::.async(runit; cb)
+
+arunit(!10;fn)
+.d("doing other work: ");.p(24*24)