* [ECOS] question about "Cyg_Scheduler" class.
@ 2001-07-20 20:36 Tony Ko
2001-07-23 1:51 ` Rafael RodrÃguez Velilla
2001-07-23 4:39 ` Rafael RodrÃguez Velilla
0 siblings, 2 replies; 3+ messages in thread
From: Tony Ko @ 2001-07-20 20:36 UTC (permalink / raw)
To: ecos-discuss
hi.
Cyg_Scheduler has a member fuction named start( ).
// Start execution of the scheduler
static void start() __attribute__ ((noreturn));
above sentense shows that.
but I don't know the meaning of "__attribute__ ((noreturn))".
so could you tell me what this is for?
thanks in advance.
Tony.
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [ECOS] question about "Cyg_Scheduler" class. 2001-07-20 20:36 [ECOS] question about "Cyg_Scheduler" class Tony Ko @ 2001-07-23 1:51 ` Rafael RodrÃguez Velilla 2001-07-23 4:39 ` Rafael RodrÃguez Velilla 1 sibling, 0 replies; 3+ messages in thread From: Rafael RodrÃÂguez Velilla @ 2001-07-23 1:51 UTC (permalink / raw) To: ecos [-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #1: Type: text/plain, Size: 778 bytes --] Tony Ko wrote: > hi. > Cyg_Scheduler has a member fuction named start( ). > > // Start execution of the scheduler > static void start() __attribute__ ((noreturn)); > above sentense shows that. > but I don't know the meaning of "__attribute__ ((noreturn))". > so could you tell me what this is for? That attribute tells gcc that when you invoque that member function you expect that it will never return from it, so the compiler can do some optimisations (it doesn't have to save the context of the calling function). Once the scheduler is started it gives the control of the CPU to the threads and never finishes ... is a non return function. -- Rafael RodrÃguez Velilla rrv@tid.es Telefónica I+D http://www.tid.es Telf: +34 - 91 337 4270 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ECOS] question about "Cyg_Scheduler" class. 2001-07-20 20:36 [ECOS] question about "Cyg_Scheduler" class Tony Ko 2001-07-23 1:51 ` Rafael RodrÃguez Velilla @ 2001-07-23 4:39 ` Rafael RodrÃguez Velilla 1 sibling, 0 replies; 3+ messages in thread From: Rafael RodrÃÂguez Velilla @ 2001-07-23 4:39 UTC (permalink / raw) To: ecos [-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #1: Type: text/plain, Size: 780 bytes --] Tony Ko wrote: > hi. > Cyg_Scheduler has a member fuction named start( ). > > // Start execution of the scheduler > static void start() __attribute__ ((noreturn)); > above sentense shows that. > but I don't know the meaning of "__attribute__ ((noreturn))". > so could you tell me what this is for? That attribute tells gcc that when you invoque that member function you expect that it will never return from it, so the compiler can do some optimisations (it doesn't have to save the context of the calling function). Once the scheduler is started it gives the control of the CPU to the threads and never finishes ... is a non return function. -- Rafael RodrÃguez Velilla rrv@tid.es Telefónica I+D http://www.tid.es Telf: +34 - 91 337 4270 ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2001-07-23 4:39 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2001-07-20 20:36 [ECOS] question about "Cyg_Scheduler" class Tony Ko 2001-07-23 1:51 ` Rafael RodrÃguez Velilla 2001-07-23 4:39 ` Rafael RodrÃguez Velilla
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