Taking a mutex multiple times - FreeRTOS

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This is a read only archive of threads posted to the FreeRTOS support forum. Use these archive pages to search previous posts. New forum support threads can be started at the FreeRTOS forums.

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Taking a mutex multiple times

Posted by alan_rouse on September 25, 2013

This issue was raised in 2008 (http://www.freertos.org/FreeRTOSSupportForumArchive/September2008/freertostakingamutexmultipletimes2258181.html) but I don’t think the answer was clear. I have a similar requirement in that one task could call a function that needs exclusive use of a resource several times before finishing with it. I propose using xSemaphoreTake() within the function, with the last call invoking xSemaphoreGive() to release the mutex. Will the task that currently holds the mutex be blocked if it calls xSemaphoreTake() again?

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