Am Samstag, 7. Juli 2007 schrieb Lars Luthman: > On Sat, 2007-07-07 at 02:34 +0200, Fons Adriaensen wrote: > > * The callback has to know when it can (re)write the object. > > Clearly it should never wait on a sema, and it is already > > periodic, so here you can use a flag in the object. > Is there any advantage in using a simple flag instead of a semaphore and > sem_trywait()?
A semaphore might mislead you to use wait()/lock() in the wrong thread... And if you only sync two threads and each of them has its own flag (for write), there shouldn't be any race-conditions and its easier to use a bool-variable than semaphore->bla(). Arnold -- visit http://www.arnoldarts.de/ --- Hi, I am a .signature virus. Please copy me into your ~/.signature and send me to all your contacts. After a month or so log in as root and do a rm / -rf. Or ask your administrator to do so...
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