Add nativescript frame callback, deprecate NimRuntime

docs/index.rst

@@ -95,15 +95,6 @@ If you would like to use Nim in an existing project:
    GDNative library resource that contains paths to dynamic libraries
    compiled by Nim.
 
-3. Add ``NimRuntime`` as an `AutoLoad singleton <https://godot.readthedocs.io/en/stable/learning/step_by_step/singletons_autoload.html>`_
-   to your project. To do this, copy ``project/scripts/NimRuntime.gdns`` into
-   your project and add these lines to ``project.godot``, adjusting path to
-   ``NimRuntime.gdns`` as necessary:
-.. code-block:: cfg
-   [autoload]
-     NimRuntime="*res://scripts/NimRuntime.gdns"
-
-
 Next Steps
 ----------
 

godot.nimble

@@ -1,4 +1,4 @@
-version = "0.4.0"
+version = "0.4.1"
 author = "Xored Software, Inc."
 description = "Godot Engine bindings"
 license = "MIT"

godot/godot.nim.cfg

@@ -1 +1,2 @@
---path:"$projectdir"
+--path:"$projectdir"
+-d:useRealtimeGc

godot/nim/godotnim.nim

@@ -1,6 +1,6 @@
 # Copyright 2017 Xored Software, Inc.
 
-import tables, typetraits, macros
+import tables, typetraits, macros, asyncdispatch
 import core.godotbase
 import core.vector2, core.rect2,
        core.vector3, core.transform2d,
@@ -668,14 +668,22 @@ proc godot_gdnative_terminate(options: ptr GodotNativeTerminateOptions) {.
     cdecl, exportc, dynlib.} =
   deallocHeap(runFinalizers = not options[].inEditor, allowGcAfterwards = false)
 
-proc godot_nativescript_thread_enter() {.
-    cdecl, exportc, dynlib.} =
+const nimGcStepLengthUs {.intdefine.} = 2000
+proc godot_nativescript_frame() {.cdecl, exportc, dynlib.} =
+  if asyncdispatch.hasPendingOperations():
+    poll(0)
+  GC_step(nimGcStepLengthUs, false, 0)
+
+when not defined(release):
+  onUnhandledException = proc(errorMsg: string) =
+    printError("Unhandled Nim exception: " & errorMsg)
+
+proc godot_nativescript_thread_enter() {.cdecl, exportc, dynlib.} =
   when compileOption("threads"):
     setupForeignThreadGc()
   else:
     print(cstring"A foreign thread is created, but app is compiled without --threads:on. Bad things will happen if Nim code is invoked from this thread.")
 
-proc godot_nativescript_thread_exit() {.
-    cdecl, exportc, dynlib.} =
+proc godot_nativescript_thread_exit() {.cdecl, exportc, dynlib.} =
   when compileOption("threads"):
     teardownForeignThreadGc()

godot/nimruntime.nim

@@ -3,6 +3,9 @@
 import asyncdispatch
 import godot, node
 
+{.warning: ("NimRuntime is deprecated - it is no longer necessary to add it " &
+            "as an AutoLoad class. It will be removed in v0.5.0.").}
+
 gdobj NimRuntime of Node:
   method enterTree*() =
     discard getTree().connect("idle_frame", self, "idle", newArray())