Threads FAQ
Because I maintain this FAQ with blogging software, the most recently edited item tends to float to the top. If you want to browse a table of contents in “semi-sane†order, here it is.
- Home
- Software
- Threads FAQ
- A glossary of terms used in threaded programming
- About the multithreaded programming FAQ
- After I create a certain number of threads, my program crashes [Unix]
- Asynchronous thread cancellation [Unix]
- How can I perform a join on any non-specific thread? [Unix]
- Mixing threads and signals [Unix]
- The history of threads
- What are the main families of threads?
- What is a thread?
- Why are reentrant library and system call interfaces good?
hi ,
thanks
how i know if a thread finish?
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Hey there
I am new to the subject of thread. Can someone tell me why is the average time that using pthread_create() to creat a thread is shorter than using fork() to create a process?
My thought is that because parent process has to wait for each child process. On the other hand, thr_create.c includes which only needs to wait for the last thread. Am I correct?
Hi Benson,
Threads are faster than a fork() because their overhead is much smaller, as they share the same memory space than their creator. This is why it takes about 30 times less time to create a pthread than fork the current process.
As for the parent waiting for the children to terminate, it’s up to you. If you create your threads “detached”, they will liberate their own memory space automatically as they terminate. Otherwise, you have to join in order for the threads to return their memory to the heap cleanly.
Hey i have a question, if i am using pthreads, each of them perform a function, these functions need to be executed in a cylcle…. but the pthread dies everytime the cycle starts, how do i keep my thread alive??
Hi…
I want to execute a thread after some specific time only…lets say 10 to 15 seconds. SLEEP is not workint… it suspends whole program… I want to suspend thread only…
Is there any way out for that?
p.s: Time granularity and accuracy doesn’t matters a much.