producer names

Previously wrote a producer consumer's implementation in C + +. Producers and consumers are primarily dealing with mutual exclusion and synchronization issues: Queue as buffer, requires mutex operation There are no products in the queue, and consumers need to wait until the producer puts the product in and notifies it. Queues are similar in slow conditions. Here I use the lis

. For example, if a consumer is being blocked on a get () operation, shutting down a queue in a producer does not cause the get () method to return an error. Q.cancel_join_thread () will no longer automatically connect to the background thread when the process exits. This will prevent the Join_thread () method from blocking. Q.join_thread () The background thread that connects the queue. This method is used to wait for all queue items to be consumed a

Producer Consumer Model fromMultiprocessingImportProcess,queueImportTime,randomdefproducer (name,q): forIinchRange (1,11): Ret="swill%s"%i q.put (ret)Print("Chef%s has produced%s"%(name, ret)) Time.sleep (random.randint (0,2))defCustomer (NAME,Q): whileTrue:ret=Q.get ()ifRET ==none: BreakTime.sleep (Random.randint (The)) Print("customer%s ate%s"%(Name,ret))if __name__=='__main__': Q=Queue () p= Process (target=

This time using Reentrantlock to implement the producer consumer model, the first reentrantlock, usually called a re-entry lock, so-called re-entry is a thread can again enter the lock has been held in the code block, the number of re-entry will be counted internally, when the count is 0, the lock is released. In fact, the Synchronized keyword represents the built-in lock, but also can be re-entered. But there are several differences:1, Reentrantlock

1. Buffer (which is used as a blocking queue) to solve the problem of strong coupling between consumers and producers. (producers and consumers do not communicate directly) 2. By balancing the producer thread and the consumer thread, the program's overall processing speed is improved. 3. In concurrent programming, this pattern solves most concurrency problems. Example 1. Producers produce once, each consumer consumes onceImportThreadingImportQueueImpo

Thread communication example-producer consumer issuesThis kind of problem describes a situation, assume that the warehouse can only store one product, the producer will produce the product into the warehouse, the consumer will take away the product of the warehouse. Assuming there is no product in the warehouse, the producer can put the product into the warehouse

This is a classic example of thread synchronization, the source code is as follows:[Java]View Plaincopy "FONT-SIZE:16PX;"> Packagedemo.thread; /** * Classic producer and consumer issues: producers constantly store their products in warehouses and consumers consume products from warehouses. * Both producers and consumers can have a number of. Storage capacity is limited, storage is not available when the library is full, no products can b

/* @author Shijin * Producer and Consumer models, the following points must be ensured: * 1 at the same time only one producer production method plus lock sychronized * 2 at the same time can only have a consumer consumer spending method plus lock sychronized * 3 producer production at the same time consumers can not consume production method lock sychron

Why use producer and consumer modelsIn the world of threads, the producer is the thread of production data, and the consumer is the thread of consumption data. In multithreaded development, producers have to wait for the consumer to continue producing data if the producer is processing fast and the consumer processing is slow. Similarly, consumers must wait for p

1, the contradiction between producer and consumer model is the imbalance of data supply and demandImport TimeImportRandom fromMultiprocessingImportQueue fromMultiprocessingImportProcessdefproducer (Q,food): forIinchRange (5): Q.put ('%s-%s'%(food,i))Print('Production of%s'%Food ) Time.sleep (Random.random ()) q.put (none) Q.put (None) Q.put (none) #有三个消费者因此需要三个信号defConsumer (q,name): whileTrue:food=Q.get ()ifFood = = None: Break Print('%s ate%

/*Multithreading: a producer a consumer*/Class Resource{private String name;private int age;Boolean flag=false;Public synchronized void Setresource (String name,int count) throws Interruptedexception{while (flag)This.wait ();{this.wait (); this.notify (); System.out.println ("producer while Continue");}This.name=name+count;System.out.println ("producer" +this.nam