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diff --git a/FreeRTOS/Demo/Safe_Interrupts_M33F_NXP_LPC55S69_MCUXpresso/Application/interrupt_handler_task.h b/FreeRTOS/Demo/Safe_Interrupts_M33F_NXP_LPC55S69_MCUXpresso/Application/interrupt_handler_task.h
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+/*
+ * FreeRTOS V202107.00
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+#ifndef INTERRUPT_HANDLER_TASK_H_
+#define INTERRUPT_HANDLER_H_
+
+/* Standard includes. */
+#include <stdint.h>
+
+/* The interrupt handler task serves user IRQ requests sent to the interrupt
+ * queue. A user IRQ request comprises of the following 2 things:
+ *
+ * 1. Data.
+ * 2. IRQ handler function.
+ */
+
+/**
+ * @brief Type of the handler function for every user IRQ request.
+ */
+typedef void ( * UserIrqHandlerFunction_t )( uint32_t ulData );
+
+/**
+ * @brief Represents user IRQ requests sent to the interrupt queue.
+ */
+typedef struct UserIrqRequest
+{
+    uint32_t ulData;
+    UserIrqHandlerFunction_t xHandlerFunction;
+} UserIrqRequest_t;
+
+/**
+ * @brief Function that implements the interrupt handler task.
+ *
+ * A FreeRTOS queue, known as interrupt queue, which holds UserIrqRequest_t items,
+ * is passed as the parameter to this task. The interrupt handler task reads the
+ * user IRQ requests from the interrupt queue and invokes the corresponding
+ * handlers.
+ */
+void vInterruptHandlerTask( void * pvParams );
+
+#endif /* INTERRUPT_HANDLER_H_ */