Rename MpuXnLock

Rename MpuXnLock  to ScopedMpuXnLock so it has the same naming
convention as ScopedMutexLock. Also make this class inherit from
NonCopyable to prevent misuse.

drivers/FlashIAP.cpp

@@ -25,7 +25,7 @@
 #include <algorithm>
 #include "FlashIAP.h"
 #include "platform/mbed_assert.h"
-#include "platform/MpuXnLock.h"
+#include "platform/ScopedMpuXnLock.h"
 
 
 #ifdef DEVICE_FLASH
@@ -58,7 +58,7 @@ int FlashIAP::init()
     int ret = 0;
     _mutex->lock();
     {
-        MpuXnLock xn;
+        ScopedMpuXnLock xn;
         if (flash_init(&_flash)) {
             ret = -1;
         }
@@ -75,7 +75,7 @@ int FlashIAP::deinit()
     int ret = 0;
     _mutex->lock();
     {
-        MpuXnLock xn;
+        ScopedMpuXnLock xn;
         if (flash_free(&_flash)) {
             ret = -1;
         }
@@ -91,7 +91,7 @@ int FlashIAP::read(void *buffer, uint32_t addr, uint32_t size)
     int32_t ret = -1;
     _mutex->lock();
     {
-        MpuXnLock xn;
+        ScopedMpuXnLock xn;
         ret = flash_read(&_flash, addr, (uint8_t *) buffer, size);
     }
     _mutex->unlock();
@@ -137,7 +137,7 @@ int FlashIAP::program(const void *buffer, uint32_t addr, uint32_t size)
             prog_size = chunk;
         }
         {
-            MpuXnLock xn;
+            ScopedMpuXnLock xn;
             if (flash_program_page(&_flash, addr, prog_buf, prog_size)) {
                 ret = -1;
                 break;
@@ -184,7 +184,7 @@ int FlashIAP::erase(uint32_t addr, uint32_t size)
     _mutex->lock();
     while (size) {
         {
-            MpuXnLock xn;
+            ScopedMpuXnLock xn;
             ret = flash_erase_sector(&_flash, addr);
         }
         if (ret != 0) {

mbed.h

@@ -95,7 +95,7 @@
 #include "platform/DirHandle.h"
 #include "platform/CriticalSectionLock.h"
 #include "platform/DeepSleepLock.h"
-#include "platform/MpuXnLock.h"
+#include "platform/ScopedMpuXnLock.h"
 #include "platform/mbed_stats.h"
 
 // mbed Non-hardware components

platform/ScopedMpuXnLock.h

@@ -13,10 +13,11 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#ifndef MBED_MPUXNLOCK_H
-#define MBED_MPUXNLOCK_H
+#ifndef MBED_SCOPEDMPUXNLOCK_H
+#define MBED_SCOPEDMPUXNLOCK_H
 
 #include "platform/mbed_mpu_mgmt.h"
+#include "platform/NonCopyable.h"
 
 namespace mbed {
 
@@ -30,14 +31,14 @@ namespace mbed {
   * void f() {
   *     // some code here
   *     {
-  *         MpuXnLock xn;
+  *         ScopedMpuXnLock xn;
   *         // Code in this block is allowed to call functions in RAM
   *     }
   *     // Execution from RAM is no longer allowed
   * }
   * @endcode
   */
-class MpuXnLock {
+class ScopedMpuXnLock : private mbed::NonCopyable<ScopedMpuXnLock> {
 public:
 
     /**
@@ -47,7 +48,7 @@ public:
      * be executed from RAM. This class uses RAII to allow
      * execution from ram while it is in scope.
      */
-    MpuXnLock()
+    ScopedMpuXnLock()
     {
         mbed_mpu_manager_lock_mem_xn();
     }
@@ -58,7 +59,7 @@ public:
      * Decrement the execute never lock to return execute from RAM
      * to its prior state.
      */
-    ~MpuXnLock()
+    ~ScopedMpuXnLock()
     {
         mbed_mpu_manager_unlock_mem_xn();
     }