Are there locks in Linux where the waiting queue is FIFO? This seems like such an obvious thing, and yet I just discovered that pthread mutexes aren\'t FIFO, and semaphores apparentl开发者_Python百科y
See this simple piece of code in PHP: //Documentation: //memcache_set ( string $key , mixed $var [, int $flag [, int $expire ]] )
In a OS we originally have a ready-queue for the threads, note 开发者_运维知识库only one queue. Why would it be better to have different queues for each semaphore. Pros and cons can be about efficienc
i have two methods -(void) a { @synchronized(self) { // critical section 1 } } -(void) b { @synchronized(self) {
I have a script in python which uses a resource which can not be used by more than a certain amount of concurrent scripts running.
Suppose I write a C++ semaphore class with an interface that models the boost Lockable concept (i.e. lock(); unlock(); try_lock(); etc.).Is it safe/recommended to use boost locks for RAII access to su
This is an extract from Advanced Liniux Programming: 开发者_开发知识库Semaphores continue to exist even after all processes using them have terminated.
I\'m looking for real world examples of needing read and write access t开发者_JS百科o the same value in concurrent systems.
EDIT: This peace of code is pretty fine (so take it as example of semaphores ;). Bug in my program was in another place - found by my friend.
I\'m working on a problem which we have to use semaphores to solve. I have an array which contains two semaphores, gsem, and given certain conditions call sem_wait(&(gsem[me])), which is supposed
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