problem about producer-consumer-Collection of common programming errors

• 
  ildjarn
  c++ multithreading boost boost-thread producer-consumer
  I am currently writing an application(using boost) that will have one producer grabbing frames and one consumer reading frames.I added a sleep statement in the producer to simulate the time to grab a frame. I expected the consumer to wait on a condition variable and on the first notify from the producer be awakened to read the frame. However, what I am seeing in the log file is the consumer(main thread) waiting on the condition variable, however the producer goes through several notifys before t
• 
  Xipo
  c multithreading openmp producer-consumer
  I am working on a simple producer-consumer problem, using OpenMP in C.My program creates 4 threads, two of which are consumers and two producers. Each producer places a character in a buffer, and the consumers just print the character. My aim is to synchronize the producers/consumers so that each producer will produce the next in order character of the alphabet and each consumer will print the next in order character that is placed in the buffer.This is my code:#include <stdio.h> #include
• 
  svick
  c# multithreading task-parallel-library priority-queue producer-consumer
  Is there any prior work of adding tasks to the TPL runtime with a varying priority?If not, generally speaking, how would I implement this?Ideally I plan on using the producer-consumer pattern to add “todo” work to the TPL. There may be times where I discover that a low priority job needs to be upgraded to a high priority job (relative to the others).If anyone has some search keywords I should use when searching for this, please mention them, since I haven’t yet found code that will do what I ne
• 
  Tomas Zaoral
  scala actor producer-consumer
  I’m currently learning Scala by the book Programming in Scala, 2nd edition. I tried to implement producer-consumer problem, using actors, but my code only prints:Producer: new value: 0 Consumer #2: read value: 0 Consumer #4: read value: 0 Consumer #1: read value: 0 Consumer #3: read value: 0 Consumer #5: read value: 0and then it hangs. I can’t figure out what I did wrong. Any help much appreciated!Producer.scala:package cz.zaoral.scala.actors.prodconsimport scala.actors.Actor import scala.actors
• 
  Shayan Pooya
  c++ pthreads mutex race-condition producer-consumer
  Is there a mechanism to have a conditional variable use multiple mutexes? I am in Linux and pthreads in C++.In an application, I need two mutexes (instead of one) to be atomically acquired and released by pthread_cond_wait(), but the function only accepts one.I have a class named BlockingManager and it has the method:blockMeFor( pthread_cond_t* my_cond, pthread_mutex_t* my_lock, set<int> waitees);and I am using it, assuming that it acquires/releases the mutex just like pthread_cond_wait.Th
• 
  SnapDragon
  c++ multithreading pthreads producer-consumer
  I’m writing a simple producer/consumer program to better understand c++ and multithreading. In my thread that ran the consumer i had these first two lines:pthread_cond_wait(&storageCond, &storageMutex);pthread_mutex_lock(&storageMutex);But the program got stuck, probably a deadlock. Then i switched the lines:pthread_mutex_lock(&storageMutex);pthread_cond_wait(&storageCond, &storageMutex);And it worked. Can someone please help me understand why this worked and the former d
• 
  Jordan Wayne Crabb
  c++ pthreads segmentation-fault producer-consumer
  I’m back with yet another segfault i can’t seem to conquer. I have figured out exactly what it is, it’s something with the char* string line. I use it to break up the bytes to GET this pdf file for a school assignment. Any and all help is appreciated!void* consumer(void *temp) { int* stuff = reinterpret_cast<int*>(temp); int x = *stuff; char* string[]; stringstream stream1; stringstream stream2; int temp1=0; int temp2=0; int sent1=0; int sent2=0; ofstream fout;strcpy(string,request); //SEG

Web site is in building