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FreeRTOS+ Ecosystem Showcase  New File System:  DOS compatible FAT FS  UDP/IP:  Thread aware UDP stack  Trace:  Run-time analysis tool  IO:  read(), write(), ioctl() interface  CLI:  Command line interface  Nabto:  Webserver in 1K, see how  TCP/IP:  Low cost pre-ported libraries  CyaSSL SSL / TLS:  Networking security protocols  Safety:  TUV certified RTOS for MCUs  RTOS Training:  Delivered online or on-site FreeRTOS Sponsors Last site update May 1 2013		FreeRTOS Sponsors Get seen by 1000s of embedded engineers a month Queue Management [API] Modules uxQueueMessagesWaiting uxQueueMessagesWaitingFromISR xQueueCreate vQueueDelete xQueueReset xQueueSend xQueueSendToBack xQueueSendToFront xQueueReceive xQueuePeek xQueueSendFromISR xQueueSendToBackFromISR xQueueSendToFrontFromISR xQueueReceiveFromISR vQueueAddToRegistry vQueueUnregisterQueue xQueueIsQueueEmptyFromISR xQueueIsQueueFullFromISR Detailed Description uxQueueMessagesWaiting queue.h unsigned portBASE_TYPE uxQueueMessagesWaiting( xQueueHandle xQueue ); Return the number of messages stored in a queue. Parameters: xQueue   A handle to the queue being queried. Returns: The number of messages available in the queue. uxQueueMessagesWaitingFromISR queue.h unsigned portBASE_TYPE uxQueueMessagesWaiting( xQueueHandle xQueue ); A version of uxQueueMessagesWaiting() that can be called from an ISR. Return the number of messages stored in a queue. Parameters: xQueue   A handle to the queue being queried. Returns: The number of messages available in the queue. vQueueDelete queue.h void vQueueDelete( xQueueHandle xQueue ); Delete a queue - freeing all the memory allocated for storing of items placed on the queue. Parameters: xQueue   A handle to the queue to be deleted. xQueueReset queue.h portBASE_TYPE xQueueReset( xQueueHandle xQueue ); Resets a queue to its original empty state. Parameters: xQueue   The handle of the queue being reset Returns: Since FreeRTOS V7.2.0 xQueueReset() always returns pdPASS. xQueueIsQueueEmptyFromISR queue.h portBASE_TYPE xQueueIsQueueEmptyFromISR( const xQueueHandle xQueue ); Queries a queue to determine if the queue is empty. This function should only be used in an ISR. Parameters: xQueue   The handle of the queue being queried Returns: pdFALSE if the queue is not empty, or any other value if the queue is empty. xQueueIsQueueFullFromISR queue.h portBASE_TYPE xQueueIsQueueFullFromISR( const xQueueHandle xQueue ); Queries a queue to determine if the queue is full. This function should only be used in an ISR. Parameters: xQueue   The handle of the queue being queried Returns: pdFALSE if the queue is not full, or any other value if the queue is full. [ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ] Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2013 Real Time Engineers Ltd. Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.