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FreeRTOS Support ArchiveThe FreeRTOS support forum is used to obtain active support directly from Real Time Engineers Ltd. In return for using our top quality software and services for free, we request you play fair and do your bit to help others too! Sign up to receive notifications of new support topics then help where you can.
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Poll binary mutexPosted by Jonas Poulsen on November 5, 2010 The documentation says that is possible to poll the state of a semaphore: "A block time of zero can be used to poll the semaphore" in the xSemaphoreTake section. I have a hard time making this work. Polling a semaphore should not change it in any way, or am I confused by the idea of "polling" and "peeking"? I can see in semphr.h that the xSemaphore cannot set the "just peeking" boolean to true. #define xSemaphoreTake( xSemaphore, xBlockTime ) xQueueGenericReceive( ( xQueueHandle ) xSemaphore, NULL, xBlockTime, pdFALSE ) Please enlighten me... BR, Jonas, DK RE: Poll binary mutexPosted by Dave on November 5, 2010 Polling the semaphore will change its state if the semaphore is available, yes you are confused between polling and peeking. RE: Poll binary mutexPosted by Jonas Poulsen on November 5, 2010 Thank you for a quick reply :-) BR, Jonas
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