esp32/modmachine: Release the GIL in machine.idle().

dpgeorge · dpgeorge · commit 2cfbe5bc0fe2 · 2021-07-22T00:17:59.000+10:00
So that other threads get a chance to run when taskYIELD() is called. See issue micropython#5344. Signed-off-by: Damien George <damien@micropython.org>
diff --git a/ports/esp32/modmachine.c b/ports/esp32/modmachine.c
@@ -232,7 +232,9 @@ STATIC mp_obj_t machine_unique_id(void) {
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_unique_id_obj, machine_unique_id);
 
 STATIC mp_obj_t machine_idle(void) {
+    MP_THREAD_GIL_EXIT();
     taskYIELD();
+    MP_THREAD_GIL_ENTER();
     return mp_const_none;
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);

Original file line number	Diff line number	Diff line change
`@@ -232,7 +232,9 @@ STATIC mp_obj_t machine_unique_id(void) {`
`232`	`232`	`STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_unique_id_obj, machine_unique_id);`
`233`	`233`
`234`	`234`	`STATIC mp_obj_t machine_idle(void) {`
	`235`	`+ MP_THREAD_GIL_EXIT();`
`235`	`236`	`taskYIELD();`
	`237`	`+ MP_THREAD_GIL_ENTER();`
`236`	`238`	`return mp_const_none;`
`237`	`239`	`}`
`238`	`240`	`STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);`