diff --git a/components/f4ll/inc/irqlock.h b/components/f4ll/inc/irqlock.h
new file mode 100644
index 0000000..a2cda22
--- /dev/null
+++ b/components/f4ll/inc/irqlock.h
@@ -0,0 +1,27 @@
+#ifndef _IRQLOCK_H_INCLUDED
+#define _IRQLOCK_H_INCLUDED
+
+#include <inttypes.h>
+#include <stm32f4xx.h>
+
+namespace f4ll {
+
+class IrqLock {
+public:
+	inline IrqLock() : m_primask(__get_PRIMASK()) {
+		__disable_irq();
+	}
+	inline void Release() {
+		__set_PRIMASK(m_primask);
+	}
+
+	inline ~IrqLock() {
+		__set_PRIMASK(m_primask);
+	}
+private:
+	uint32_t m_primask;
+};
+
+}
+
+#endif	//	_IRQLOCK_H_INCLUDED