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diff --git a/FreeRTOS-Labs/Demo/FreeRTOS_Plus_POSIX_with_actor_Windows_Simulator/lib/include/FreeRTOS_POSIX/mqueue.h b/FreeRTOS-Labs/Demo/FreeRTOS_Plus_POSIX_with_actor_Windows_Simulator/lib/include/FreeRTOS_POSIX/mqueue.h
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+/*
+ * Amazon FreeRTOS POSIX V1.1.0
+ * Copyright (C) 2019 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://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+/**
+ * @file mqueue.h
+ * @brief Message queues.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/mqueue.h.html
+ */
+
+#ifndef _FREERTOS_POSIX_MQUEUE_H_
+#define _FREERTOS_POSIX_MQUEUE_H_
+
+/* FreeRTOS+POSIX includes. */
+#include "FreeRTOS_POSIX/time.h"
+
+/**
+ * @brief Message queue descriptor.
+ */
+typedef void * mqd_t;
+
+/**
+ * @brief Message queue attributes.
+ */
+struct mq_attr
+{
+    long mq_flags;   /**< Message queue flags. */
+    long mq_maxmsg;  /**< Maximum number of messages. */
+    long mq_msgsize; /**< Maximum message size. */
+    long mq_curmsgs; /**< Number of messages currently queued. */
+};
+
+/**
+ * @brief Close a message queue.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_close.html
+ *
+ * @retval 0 - Upon successful completion
+ * @retval -1 - A error occurred. errno is also set.
+ *
+ * @sideeffect Possible errno values
+ * <br>
+ * EBADF - The mqdes argument is not a valid message queue descriptor.
+ */
+int mq_close( mqd_t mqdes );
+
+/**
+ * @brief Get message queue attributes.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_getattr.html
+ *
+ * @retval 0 - Upon successful completion
+ * @retval -1 - A error occurred. errno is also set.
+ *
+ * @sideeffect Possible errno values
+ * <br>
+ * DBADF - The mqdes argument is not a valid message queue descriptor.
+ */
+int mq_getattr( mqd_t mqdes,
+                struct mq_attr * mqstat );
+
+/**
+ * @brief Open a message queue.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_open.html
+ *
+ * @note Supported name pattern: leading &lt;slash&gt; character in name is always required;
+ * the maximum length (excluding null-terminator) of the name argument can be NAME_MAX.
+ * The default value of NAME_MAX in FreeRTOS_POSIX_portable_default.h is 64, which can be
+ * overwritten by user.
+ * @note mode argument is not supported.
+ * @note Supported oflags: O_RDWR, O_CREAT, O_EXCL, and O_NONBLOCK.
+ *
+ * @retval Message queue descriptor -- Upon successful completion
+ * @retval (mqd_t) - 1 -- An error occurred. errno is also set.
+ *
+ * @sideeffect Possible errno values
+ * <br>
+ * EINVAL - name argument is invalid (not following name pattern),
+ * OR if O_CREAT is specified in oflag with attr argument not NULL and either mq_maxmsg or mq_msgsize is equal to or less than zero,
+ * OR either O_CREAT or O_EXCL is not set and a queue with the same name is unlinked but pending to be removed.
+ * <br>
+ * EEXIST - O_CREAT and O_EXCL are set and the named message queue already exists.
+ * <br>
+ * ENOSPC - There is insufficient space for the creation of the new message queue.
+ * <br>
+ * ENOENT - O_CREAT is not set and the named message queue does not exist.
+ */
+mqd_t mq_open( const char * name,
+               int oflag,
+               mode_t mode,
+               struct mq_attr * attr );
+
+/**
+ * @brief Receive a message from a message queue.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_receive.html
+ *
+ * @note msg_prio argument is not supported. Messages are not checked for corruption.
+ *
+ * @retval The length of the selected message in bytes - Upon successful completion.
+ * The message is removed from the queue
+ * @retval -1 - An error occurred. errno is also set.
+ *
+ * @sideeffect Possible errno values
+ * <br>
+ * EBADF - The mqdes argument is not a valid message queue descriptor open for reading.
+ * <br>
+ * EMSGSIZE - The specified message buffer size, msg_len, is less than the message size attribute of the message queue.
+ * <br>
+ * ETIMEDOUT - The O_NONBLOCK flag was not set when the message queue was opened,
+ * but no message arrived on the queue before the specified timeout expired.
+ * <br>
+ * EAGAIN - O_NONBLOCK was set in the message description associated with mqdes, and the specified message queue is empty.
+ */
+ssize_t mq_receive( mqd_t mqdes,
+                    char * msg_ptr,
+                    size_t msg_len,
+                    unsigned int * msg_prio );
+
+/**
+ * @brief Send a message to a message queue.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_send.html
+ *
+ * @note msg_prio argument is not supported.
+ *
+ * @retval 0 - Upon successful completion.
+ * @retval -1 - An error occurred. errno is also set.
+ *
+ * @sideeffect Possible errno values
+ * <br>
+ * EBADF - The mqdes argument is not a valid message queue descriptor open for writing.
+ * <br>
+ * EMSGSIZE - The specified message length, msg_len, exceeds the message size attribute of the message queue,
+ * OR insufficient memory for the message to be sent.
+ * <br>
+ * ETIMEDOUT - The O_NONBLOCK flag was not set when the message queue was opened,
+ * but the timeout expired before the message could be added to the queue.
+ * <br>
+ * EAGAIN - The O_NONBLOCK flag is set in the message queue description associated with mqdes,
+ * and the specified message queue is full.
+ */
+int mq_send( mqd_t mqdes,
+             const char * msg_ptr,
+             size_t msg_len,
+             unsigned msg_prio );
+
+/**
+ * @brief Receive a message from a message queue with timeout.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_timedreceive.html
+ *
+ * @note msg_prio argument is not supported. Messages are not checked for corruption.
+ *
+ * @retval The length of the selected message in bytes - Upon successful completion.
+ * The message is removed from the queue
+ * @retval -1 - An error occurred. errno is also set.
+ *
+ * @sideeffect Possible errno values
+ * <br>
+ * EBADF - The mqdes argument is not a valid message queue descriptor open for reading.
+ * <br>
+ * EMSGSIZE - The specified message buffer size, msg_len, is less than the message size attribute of the message queue.
+ * <br>
+ * EINVAL - The process or thread would have blocked, and the abstime parameter specified a nanoseconds field value
+ * less than zero or greater than or equal to 1000 million.
+ * <br>
+ * ETIMEDOUT - The O_NONBLOCK flag was not set when the message queue was opened,
+ * but no message arrived on the queue before the specified timeout expired.
+ * <br>
+ * EAGAIN - O_NONBLOCK was set in the message description associated with mqdes, and the specified message queue is empty.
+ */
+ssize_t mq_timedreceive( mqd_t mqdes,
+                         char * msg_ptr,
+                         size_t msg_len,
+                         unsigned * msg_prio,
+                         const struct timespec * abstime );
+
+/**
+ * @brief Send a message to a message queue with timeout.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_timedsend.html
+ *
+ * @note msg_prio argument is not supported.
+ *
+ * @retval 0 - Upon successful completion.
+ * @retval -1 - An error occurred. errno is also set.
+ *
+ * @sideeffect Possible errno values
+ * <br>
+ * EBADF - The mqdes argument is not a valid message queue descriptor open for writing.
+ * <br>
+ * EMSGSIZE - The specified message length, msg_len, exceeds the message size attribute of the message queue,
+ * OR insufficient memory for the message to be sent.
+ * <br>
+ * EINVAL - The process or thread would have blocked, and the abstime parameter specified a nanoseconds field
+ * value less than zero or greater than or equal to 1000 million.
+ * <br>
+ * ETIMEDOUT - The O_NONBLOCK flag was not set when the message queue was opened,
+ * but the timeout expired before the message could be added to the queue.
+ * <br>
+ * EAGAIN - The O_NONBLOCK flag is set in the message queue description associated with mqdes,
+ * and the specified message queue is full.
+ */
+int mq_timedsend( mqd_t mqdes,
+                  const char * msg_ptr,
+                  size_t msg_len,
+                  unsigned msg_prio,
+                  const struct timespec * abstime );
+
+/**
+ * @brief Remove a message queue.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_unlink.html
+ *
+ * @retval 0 - Upon successful completion.
+ * @retval -1 - An error occurred. errno is also set.
+ *
+ * @sideeffect Possible errno values
+ * <br>
+ * EINVAL - name argument is invalid. Refer to requirements on name argument in mq_open().
+ * <br>
+ * ENOENT - The named message queue does not exist.
+ */
+int mq_unlink( const char * name );
+
+#endif /* ifndef _FREERTOS_POSIX_MQUEUE_H_ */