extmod/uasyncio: Add optional implementation of core uasyncio in C.

Implements Task and TaskQueue classes in C, using a pairing-heap data
structure.  Using this reduces RAM use of each Task, and improves overall
performance of the uasyncio scheduler.

4 files changed, 9 insertions, 0 deletions

diff --git a/py/builtin.h b/py/builtin.h
index 2dbe8a782..1e4769cd6 100644
--- a/py/builtin.h
+++ b/py/builtin.h
@@ -103,6 +103,7 @@ extern const mp_obj_module_t mp_module_thread;
 extern const mp_obj_dict_t mp_module_builtins_globals;
 
 // extmod modules
+extern const mp_obj_module_t mp_module_uasyncio;
 extern const mp_obj_module_t mp_module_uerrno;
 extern const mp_obj_module_t mp_module_uctypes;
 extern const mp_obj_module_t mp_module_uzlib;
diff --git a/py/mpconfig.h b/py/mpconfig.h
index c5829a3e0..d96687b81 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -1291,6 +1291,10 @@ typedef double mp_float_t;
 
 // Extended modules
 
+#ifndef MICROPY_PY_UASYNCIO
+#define MICROPY_PY_UASYNCIO (0)
+#endif
+
 #ifndef MICROPY_PY_UCTYPES
 #define MICROPY_PY_UCTYPES (0)
 #endif
diff --git a/py/objmodule.c b/py/objmodule.c
index 79047009f..060e1bc1e 100644
--- a/py/objmodule.c
+++ b/py/objmodule.c
@@ -170,6 +170,9 @@ STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
 
     // extmod modules
 
+    #if MICROPY_PY_UASYNCIO
+    { MP_ROM_QSTR(MP_QSTR__uasyncio), MP_ROM_PTR(&mp_module_uasyncio) },
+    #endif
     #if MICROPY_PY_UERRNO
     { MP_ROM_QSTR(MP_QSTR_uerrno), MP_ROM_PTR(&mp_module_uerrno) },
     #endif
diff --git a/py/py.mk b/py/py.mk
index 1a56dcce8..8c90beff7 100644
--- a/py/py.mk
+++ b/py/py.mk
@@ -168,6 +168,7 @@ PY_CORE_O_BASENAME = $(addprefix py/,\
 	)
 
 PY_EXTMOD_O_BASENAME = \
+	extmod/moduasyncio.o \
 	extmod/moductypes.o \
 	extmod/modujson.o \
 	extmod/modure.o \