Initial commit

components/libraries/util/app_util_platform.c

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+/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is property of Nordic Semiconductor ASA.
+ * Terms and conditions of usage are described in detail in NORDIC
+ * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
+ *
+ * Licensees are granted free, non-transferable use of the information. NO
+ * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
+ * the file.
+ *
+ */
+
+#include "app_util_platform.h"
+
+static uint32_t m_in_critical_region = 0;
+
+void critical_region_enter(void)
+{
+    __disable_irq();    
+    m_in_critical_region++;    
+}
+
+void critical_region_exit(void)
+{
+    m_in_critical_region--;    
+    if (m_in_critical_region == 0)
+    {
+        __enable_irq();
+    }
+}