Fix quantum ring_buffer for ChibiOS (#19683)

platforms/atomic_util.h

@@ -24,9 +24,13 @@
 #        define ATOMIC_BLOCK _Static_assert(0, "ATOMIC_BLOCK not implemented")
 #        define ATOMIC_BLOCK_RESTORESTATE _Static_assert(0, "ATOMIC_BLOCK_RESTORESTATE not implemented")
 #        define ATOMIC_BLOCK_FORCEON _Static_assert(0, "ATOMIC_BLOCK_FORCEON not implemented")
+#        define ATOMIC_FORCEON _Static_assert(0, "ATOMIC_FORCEON not implemented")
+#        define ATOMIC_RESTORESTATE _Static_assert(0, "ATOMIC_RESTORESTATE not implemented")
 #    endif
 #else /* do nothing atomic macro */
-#    define ATOMIC_BLOCK for (uint8_t __ToDo = 1; __ToDo; __ToDo = 0)
-#    define ATOMIC_BLOCK_RESTORESTATE ATOMIC_BLOCK
-#    define ATOMIC_BLOCK_FORCEON ATOMIC_BLOCK
+#    define ATOMIC_BLOCK(t) for (uint8_t __ToDo = 1; __ToDo; __ToDo = 0)
+#    define ATOMIC_FORCEON
+#    define ATOMIC_RESTORESTATE
+#    define ATOMIC_BLOCK_RESTORESTATE ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
+#    define ATOMIC_BLOCK_FORCEON ATOMIC_BLOCK(ATOMIC_FORCEON)
 #endif

platforms/chibios/atomic_util.h

@@ -30,8 +30,19 @@ static __inline__ void __interrupt_enable__(const uint8_t *__s) {
     (void)__s;
 }
 
-#define ATOMIC_BLOCK(type) for (type, __ToDo = __interrupt_disable__(); __ToDo; __ToDo = 0)
-#define ATOMIC_FORCEON uint8_t sreg_save __attribute__((__cleanup__(__interrupt_enable__))) = 0
+static __inline__ syssts_t __interrupt_lock__(void) {
+    return chSysGetStatusAndLockX();
+}
+
+static __inline__ void __interrupt_unlock__(const syssts_t *__s) {
+    chSysRestoreStatusX(*__s);
+
+    __asm__ volatile("" ::: "memory");
+}
+
+#define ATOMIC_BLOCK(type) for (type, __ToDo = 1; __ToDo; __ToDo = 0)
+#define ATOMIC_FORCEON uint8_t status_save __attribute__((__cleanup__(__interrupt_enable__))) = __interrupt_disable__()
+#define ATOMIC_RESTORESTATE syssts_t status_save __attribute__((__cleanup__(__interrupt_unlock__))) = __interrupt_lock__()
 
-#define ATOMIC_BLOCK_RESTORESTATE _Static_assert(0, "ATOMIC_BLOCK_RESTORESTATE not implemented")
+#define ATOMIC_BLOCK_RESTORESTATE ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
 #define ATOMIC_BLOCK_FORCEON ATOMIC_BLOCK(ATOMIC_FORCEON)

quantum/ring_buffer.h

@@ -1,8 +1,8 @@
 #pragma once
 
-#include <util/atomic.h>
 #include <stdint.h>
 #include <stdbool.h>
+#include "atomic_util.h"
 
 #ifndef RBUF_SIZE
 #    define RBUF_SIZE 32