Binary Semaphore

Mike_d

Intellectual 1000 points

Hi,

How is a binary semaphore created? I can't find it documented or in the header comments.

Thansk,

-Mike

over 14 years ago

0 David Friedland over 14 years ago

TI__Mastermind 18320 points

What version of BIOS are you using?

Are you tring to create the semaphore at config time or at run time?

0 Mike_d over 14 years ago in reply to David Friedland

Intellectual 1000 points

DSP/BIOS 5.41.10.36

0 ToddMullanix over 14 years ago in reply to Mike_d

TI__Guru* 96960 points

Hi Mike,

All the logic for a binary semaphore is in the pendBinary and postBinary. The create for a binary semaphore is the same as a counting one (e.g. SEM_create). However, make sure you set the count to zero or one. Now just use the pendBinary/postBinary functions.

When dealing with a specific semaphore handle, do not mix and match the binary pend/post functions with the standard counting pend/post functions. As expected, this gives undeterministic results.

Todd

0 David Friedland over 14 years ago in reply to Mike_d

TI__Mastermind 18320 points

You will create a binary semaphore using SEM_create(), just like you would use with a counting semaphore. The initial semaphore count will be either 1 or 0, depending on your needs. You can then use the SEM_pendBinary() and SEM_postBinary() calls to wait for and signal the semaphore.

Dave

Processors

Processors forum

Binary Semaphore