stopwatch 计时

AppKit/stopwatch.c

@@ -0,0 +1 @@
+#include <stopwatch.h>

AppKit/stopwatch.h

@@ -0,0 +1,38 @@
+#ifndef INCLUDED_STOPWATCH_H
+#define INCLUDED_STOPWATCH_H
+
+#ifndef INCLUDED_OS_SYSTICK_H
+#include <os_systick.h>
+#endif /*INCLUDED_OS_SYSTICK_H*/
+
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+typedef struct {
+    volatile os_tick_t start_tick;
+    volatile os_tick_t end_tick;
+}stopwatch_t;
+
+OS_STATIC_FORCE_INLINE
+void stopwatch_init(stopwatch_t* self) {
+    self->start_tick = os_systick_safe_get();
+}
+
+OS_STATIC_FORCE_INLINE
+void stopwatch_start(stopwatch_t* self) {
+    self->start_tick = os_systick_safe_get();
+}
+
+OS_STATIC_FORCE_INLINE
+void stopwatch_stop(stopwatch_t* self) {
+    self->end_tick = os_systick_safe_get();
+}
+
+OS_STATIC_FORCE_INLINE
+os_tick_t stopwatch_elapsed_ticks(stopwatch_t* self) {
+    return self->end_tick - self->start_tick;
+}
+
+
+#endif /*INCLUDED_STOPWATCH_H*/