shared-memory

How to wait and notify like in Java In C/C++ for shared memory between two or more thread?I use pthread library. Instead of the Java object that you would use to wait/notify, you need two objects: a mutex and a condition variable. These are initialized with pthread_mutex_init and pthread_cond_init . Where you would have synchronized on the Java object, use pthread_mutex_lock and pthread_mutex_unlock (note that in C you have to pair these yourself manually). If you don't need to wait/notify, just lock/unlock, then you don't need the condition variable, just the mutex. Bear in mind that mutexes

boost::variant claims that it is a value type. Does this mean that it's safe to simply write out the raw representation of a boost::variant and load it back later, as long as it only contains POD types? Assume that it will be reloaded by code compiled by the same compiler, and same version of boost, on the same architecture. Also, (probably) equivalently, can boost::variant be used in shared memory? Regarding serialisation: It should work, yes. But why don't you use boost::variant 's visitation mechanism to write out the actual type contained in the variant? struct variant_serializer : boost:

Working recently with the extension pthreads , i discovered an anomaly. I have a simple object with an internal state: class Sum { private $value = 0; public function add($inc) { $this->value += $inc; } public function getValue() { return $this->value; } } Now i created a Thread class that does something with this object: class MyThread extends Thread { private $sum; public function __construct(Sum $sum) { $this->sum = $sum; } public function run(){ for ($i=0; $i < 10; $i++) { $this->sum->add(5); echo $this->sum->getValue() . " "; } } } In my main function i created a Sum object, injected it

Is there a way to store small data in RAM memory using PHP so that I can have access to the data between different session instead of regenerating it. Something similar to memcached (I don't have access to memcahced). My current solution is just to save the data in file. APC ? It works differents from memcached; in memcached you can access the data from various languages (c, python, etc..) while APC works only for PHP. EDIT are you sure that APC is installed correctly? Did you add extension=apc.so in your php.ini? And to restart apache (im assuming youre on a lamp server with apache2)? What