condition-variable

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Condition variables

I noticed that when I\'m performing a wait operation on a condition variable, it immediately returns. The consequence is that, when executing the following dummy code, 100% of one CPU is being used in[详细]

2023-02-26 10:08 分类：问答
condition variable - why calling pthread_cond_signal() before calling pthread_cond_wait() is a logical error?

It\'s written in POSIX threads tutorial https://computing.llnl.gov开发者_如何学编程/tutorials/pthreads/[详细]

2023-02-22 01:33 分类：问答
How can you implement a condition variable using semaphores?

A while back I was thinking about how to implement various synchronization primitives in terms of one another.For example, in pthrea开发者_开发知识库ds you get mutexes and condition variables, and fro[详细]

2023-02-18 16:57 分类：问答
Null arguments to pthread_cond_wait

If a thread calls pthread_cond_wait(cond_ptr,mutex_ptr) will a null cond_ptr, is it guaranteed to not fall asleep?[详细]

2023-02-14 20:29 分类：问答
Year is out of valid range when passing pos_infin as timeout to timed_wait

The following code reproduces the error: #include <iostream> #include \"boost/thread.hpp\" #include \"boost/date_time/posix_time/ptime.hpp\"[详细]

2023-02-03 19:58 分类：问答
Multi-threaded code and condition variable usage

A multi-threaded piece of code accesses a resource (eg: a filesystem) asynchronously. To achieve this, I\'ll use condition variables. Suppose the FileSystem is an interface like:[详细]

2023-01-25 05:29 分类：问答
How can I improve my real-time behavior in multi-threaded app using pthreads and condition variables?

I have a multi-threaded application that is using pthreads.I have a mutex() lock and condition variables().There are two threads, one thread is producing data for the second thread, a worker, which is[详细]

2022-12-31 03:45 分类：问答
Why do pthreads’ condition variable functions require a mutex?

I’m reading up on pthread.h; the condition variable related functions (like pthread_cond_wait(3)) require a mutex as an argument. Why? As far as I can tell, I’m going to be creating a mutex just to[详细]

2022-12-29 16:02 分类：问答
Do condition variables still need a mutex if you're changing the checked value atomically?

Here is the typical way to use a condition variable: // The reader(s) lock(some_mutex); if(protected_by_mutex_var != desired_value)[详细]

2022-12-25 01:36 分类：问答
How to connect signals into complex circuits in .NET?

For some concurrent code, I want to connect a bunch of signals together like a circuit. In .NET we can do a WaitAll or WaitAny on a collection of signals. I want to do something like this:[详细]

2022-12-21 10:22 分类：问答