18 lines
572 B
C
18 lines
572 B
C
#ifndef _MEMORY_BARRIER_H_
|
|
#define _MEMORY_BARRIER_H_
|
|
|
|
#include <util/atomic.h>
|
|
#include <avr/version.h>
|
|
|
|
// Provide a memory barrier to the compiler. This informs
|
|
// the compiler that is should write any cached values that
|
|
// are destined for a global variable and discard any other
|
|
// cached values from global variables.
|
|
//
|
|
// Note that this behavior does apply to all global variables,
|
|
// not just volatile ones. However, cached local variables
|
|
// are not affected as they are not externally visible.
|
|
|
|
#define MEMORY_BARRIER() __asm volatile( "" ::: "memory" )
|
|
|
|
#endif |