Removed EventLoop class, even loop is a module. Saves ~30kB RAM.

src/lib/uasyncio/core.py

@@ -7,47 +7,49 @@ if __debug__:
 
 type_gen = type((lambda: (yield))())
 
-class EventLoop:
+q = []
+cnt = 0
+last_sleep = 0  # For performance stats
 
-    def __init__(self):
-        self.q = []
-        self.cnt = 0
-        self.last_sleep = 0  # For performance stats
+def call_soon(callback, *args):
+    call_at(0, callback, *args)
 
-    def call_soon(self, callback, *args):
-        self.call_at(0, callback, *args)
+def call_later(delay, callback, *args):
+    call_at(utime.ticks_us() + delay, callback, *args)
 
-    def call_later(self, delay, callback, *args):
-        self.call_at(utime.ticks_us() + delay, callback, *args)
+def call_at(time, callback, *args):
+    global cnt
 
-    def call_at(self, time, callback, *args):
-        # Including self.cnt is a workaround per heapq docs
     if __debug__:
-            log.debug("Scheduling %s", (int(time), self.cnt, callback, args))
-        uheapq.heappush(self.q, (int(time), self.cnt, callback, args))
-        self.cnt += 1
+        log.debug("Scheduling %s", (int(time), cnt, callback, args))
+    # Including self.cnt is a workaround per heapq docs
+    uheapq.heappush(q, (int(time), cnt, callback, args))
+
+    cnt += 1
+
+def wait(delay):
+    global last_sleep
 
-    def wait(self, delay):
-        # Default wait implementation, to be overriden in subclasses
-        # with IO scheduling
     if __debug__:
         log.debug("Sleeping for: %s", delay)
-        self.last_sleep = delay
+
+    last_sleep = delay
     utime.sleep_us(delay)
 
-    def run_forever(self):
+def run_forever():
+    global q, cnt
+
     while True:
-            if self.q:
-                t, cnt, cb, args = uheapq.heappop(self.q)
+        if q:
+            t, cnt, cb, args = uheapq.heappop(q)
             if __debug__:
                 log.debug("Next coroutine to run: %s", (t, cnt, cb, args))
-#                __main__.mem_info()
             tnow = utime.ticks_us()
             delay = t - tnow
             if delay > 0:
-                    self.wait(delay)
+                wait(delay)
         else:
-                self.wait(-1)
+            wait(-1)
             # Assuming IO completion scheduled some tasks
             continue
         if callable(cb):
@@ -86,39 +88,29 @@ class EventLoop:
                     #    self.remove_writer(arg.fileno())
 
                 elif isinstance(ret, type_gen):
-                        self.call_soon(ret)
+                    call_soon(ret)
                 elif ret is None:
                     # Just reschedule
                     pass
                 else:
-                        assert False, "Unsupported coroutine yield value: %r (of type %r)" % (ret, type(ret))
+                    assert False, "Unsupported yield value: %r (of type %r)" % (ret, type(ret))
             except StopIteration as e:
                 if __debug__:
                     log.debug("Coroutine finished: %s", cb)
                 continue
-                self.call_later(delay, cb, *args)
+            call_later(delay, cb, *args)
 
-    '''
-    def run_until_complete(self, coro):
-        def _run_and_stop():
-            yield from coro
-            yield StopLoop(0)
-        self.call_soon(_run_and_stop())
-        self.run_forever()
-    '''
-    #def close(self):
-    #    pass
-
-
-'''
-class SysCall:
-
-    def __init__(self, *args):
-        self.args = args
-
-    def handle(self):
-        raise NotImplementedError
-'''
+# def run_until_complete(self, coro):
+#    def _run_and_stop():
+#        yield from coro
+#        yield StopLoop(0)
+#    self.call_soon(_run_and_stop())
+#    self.run_forever()
+# class SysCall:
+#    def __init__(self, *args):
+#        self.args = args
+#    def handle(self):
+#        raise NotImplementedError
     
 # Optimized syscall with 1 arg
 class SysCall1:
@@ -137,22 +129,22 @@ class StopLoop(SysCall1):
 class Sleep(SysCall1):
     pass
 
-class IORead(SysCall1):
-    pass
+# class IORead(SysCall1):
+#    pass
 
-class IOWrite(SysCall1):
-    pass
+# class IOWrite(SysCall1):
+#    pass
 
-class IOReadDone(SysCall1):
-    pass
+# class IOReadDone(SysCall1):
+#    pass
 
-class IOWriteDone(SysCall1):
-    pass
+# class IOWriteDone(SysCall1):
+#    pass
 
-_event_loop = None
-_event_loop_class = EventLoop
-def get_event_loop():
-    global _event_loop
-    if _event_loop is None:
-        _event_loop = _event_loop_class()
-    return _event_loop
+# _event_loop = None
+# _event_loop_class = EventLoop
+# def get_event_loop():
+#    global _event_loop
+#    if _event_loop is None:
+#        _event_loop = _event_loop_class()
+#    return _event_loop