stmhal: Implement a proper thread scheduler.

This patch changes the threading implementation from simple round-robin
with busy waits on mutexs, to proper scheduling whereby threads that are
waiting on a mutex are only scheduled when the mutex becomes available.

1 files changed, 13 insertions, 1 deletions

diff --git a/stmhal/mpthreadport.h b/stmhal/mpthreadport.h
index 4fef323eb..3d8b4ef01 100644
--- a/stmhal/mpthreadport.h
+++ b/stmhal/mpthreadport.h
@@ -29,7 +29,7 @@
 #include "py/mpthread.h"
 #include "pybthread.h"
 
-typedef uint32_t mp_thread_mutex_t;
+typedef pyb_mutex_t mp_thread_mutex_t;
 
 void mp_thread_init(void);
 void mp_thread_gc_others(void);
@@ -42,4 +42,16 @@ static inline struct _mp_state_thread_t *mp_thread_get_state(void) {
     return pyb_thread_get_local();
 }
 
+static inline void mp_thread_mutex_init(mp_thread_mutex_t *m) {
+    pyb_mutex_init(m);
+}
+
+static inline int mp_thread_mutex_lock(mp_thread_mutex_t *m, int wait) {
+    return pyb_mutex_lock(m, wait);
+}
+
+static inline void mp_thread_mutex_unlock(mp_thread_mutex_t *m) {
+    pyb_mutex_unlock(m);
+}
+
 #endif // __MICROPY_INCLUDED_STMHAL_MPTHREADPORT_H__