MessageQ_get() in Interrupt Mode

RCReddy

Hi All,

what i understand from MessageQ_Get() is that it is POLLING based mechanism to retrieve messages [underlying mechanism is signal() at MessageQ_put() and wait() at MessageQ_get()]. My interest lies in making it Interrupt based, meaning whenever there is message, it should awake the other core.

1.[one method is to use Notify module and Notify the reader core by the writer core, the moment you do MessageQ_put() at writer core].

apart from above, is there any way, INTERRUPT based mechanism can be invoked within MessageQ Module APIs. please let me know.

Thanks

RC Reddy

over 13 years ago

0 judahvang over 13 years ago

TI__Mastermind 32475 points

RCReddy,

I think you misunderstand the MessageQ_get(). It is not pulling be default (you can make it pull, if that's what you want). The default behavior is interrupt based. MessageQ_get() pends on a semaphore if no Message is available. When someone does a Message_put(), it will put the message on the queue, send an interrupt if necessary and a semaphore post will occur. I think this is what you want correct?

Judah

0 RCReddy over 13 years ago

Genius 3575 points

Further to above question,

1. is there anyway i can link IPC moduels to sys/bios Thread Synchronization modules. say CORE 0 sends message to CORE 1, Instead of MessageQ_Get(), i want to have Mailbox_pend() wake up [remember, this is CORE TO CORE Communication and i want to link MessageQ_get() to SYS/BIOS mailbox.].

my idea is to have a Mailbox pend on some generic COMMON Header [objects/structure elements common between mailbox header and MessageQ_Header() ]. Is there any provision for MessageQ module and sys/bios MailBox concepts to gel together.

Thanks

RC Reddy

0 RCReddy over 13 years ago in reply to judahvang

Genius 3575 points

Hi Judah,

got it, now i understood,

Thanks

RC Reddy

0 RCReddy over 13 years ago in reply to RCReddy

Genius 3575 points

not only Mailbox, any Thread Synchronization Module gelling with MessageQ Module ? any example code or any pointers ..please let me know.

RC Reddy

0 judahvang over 13 years ago in reply to RCReddy

TI__Mastermind 32475 points

RC Reddy,

My only pointer is to read the IPC User's guide.pdf. There's a chapter called "Thread Synchronization". This should give you some hints.

You should be able to use like Mailbox_pend()/post() as the synchronization calls for Messageq_put()/get().

Judah

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MessageQ_get() in Interrupt Mode