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Date of registration: Mar 1st 2018

Posts: 1


Thursday, March 1st 2018, 4:15pm

[SOLVED] semaphore already created?


is there a way to find out if a semaphore or mailbox is already created?


OS_RSEMA* sema = NULL;


if(sema != NULL){
printf("sema exists");

I'm using embOS 3.60d


Super Moderator

Date of registration: Nov 14th 2007

Posts: 271


Thursday, March 1st 2018, 4:35pm

Hi Axel,

no, there is unfortunately no easy way and I don't think you example will work like that since you have only declared a pointer but not the variable itself.
Usually it would be something like:

OS_RSEMA sema;


But &sema has also a valid value before OS_CreateRSema() .

With the debug build of embOS you could check sema.Id which gets a valid value when the semaphore is created.
But this Id member is only available in embOS debug builds.

Best regards,