10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
I was asked to add this piece of code to a c program which I will execute through the shell:
for(long i = 0; i < NITER; i++)
{ sem_wait( &sema);
count++;
sem_post( &sema); }
I didn't get it, which is the critical section ? if it's "count++" how would a thread wake up in order to enter it... (1 Reply)
Discussion started by: uniran
1 Replies
2. Programming
If I create a semaphore and then I fork a number of child processes then all the child process use that same semaphore.
Since the process address spaces are different rfom each other then how all the child process are able to access the same semaphore?
I understand that semaphore/mutex is at os... (0 Replies)
Discussion started by: rupeshkp728
0 Replies
3. Programming
Hi friends,
I have this very famous Operating System book titiled, "Operating System Concepts" by Abaraham Silbertschatz 7th edition.
Regarding the semaphores, here is a paragraph from the book which says,
We can also use semaphores to solve various synchronization problems. For example,... (1 Reply)
Discussion started by: gabam
1 Replies
4. Programming
Hi friends,
I want to print the the following sequence of numbers using sempahores.
2 3 2 3 2 3 2 3
But something seems to be wrong regarding my concept of semaphores, I am using a single function, a single semaphore, and two threads, but I am not succeeding to achieve my goal,
it prints as... (1 Reply)
Discussion started by: gabam
1 Replies
5. Shell Programming and Scripting
Control two exclusively shared resources(semaphore). The two resources are two files. The producer will write even numbers to one file, and odd numbers to another one. The consumer respectively reads from each file until it gets 5 even numbers and 5 odd numbers.
Can any one help me with the... (0 Replies)
Discussion started by: gokult
0 Replies
6. UNIX for Dummies Questions & Answers
what is semaphore? can any body explain it in a more simple way than the manual ??
replies appreciated
Regards
raguram R (7 Replies)
Discussion started by: raguramtgr
7 Replies
7. Shell Programming and Scripting
Hi,
I am looking to use a semaphore for the first time in one of my scripts. I am just wondering if there are any simple examples or tutorials around?
I am a beginner so the simpler the better :)
Thanks
-Jaken (2 Replies)
Discussion started by: Jaken
2 Replies
8. Programming
Hi,
I am trying to write stuff to a shared memory using a writer, and reading the corresponding stuff using a reader. I am facing problems while releasing the lock, as a result of which I am having segmentation faults. The code is as follows...
/********** writer.c ***********/
... (1 Reply)
Discussion started by: jacques83
1 Replies
9. UNIX for Dummies Questions & Answers
Hi,
I'm new to UNIX.
I need to know what's a semaphore
Do reply.
Thanks
VJ (3 Replies)
Discussion started by: vjsony
3 Replies
10. UNIX for Dummies Questions & Answers
hi, is there any command where we can monitor semaphores? (1 Reply)
Discussion started by: yls177
1 Replies