01-29-2009
I should have mentioned that I have to stick with 5.8.5 compatible code here. This needs to get deployed on multiple servers where a perl upgrade is not an option.
Currently I am moving away from threads and just using good old fork & exec. Not as platform independent as I had hoped but I'll cross that barrier when I need to.
10 More Discussions You Might Find Interesting
1. Programming
I am trying to writa a multi-client & multi-threaded TCP server.
There is a thread pool. Each thread in the pool will handle
requests of multiple clients.
But here I have a problem. I find a solution but it is not how
it must be... i think. When threads working without sleep(1)
I can't... (0 Replies)
Discussion started by: Parahat Melayev
0 Replies
2. Programming
I was wondering if anyone could give me a good idea how to calculate how balanced the threading is on a multi-threaded application. I want a percentage, such as "threads are 80% balanced."
This is the way I am currently going about it, maybe it is good, maybe not.
First, whenever a thread... (2 Replies)
Discussion started by: DreamWarrior
2 Replies
3. Shell Programming and Scripting
I need to query a http site and then parse the xml results, this works well if I use the string in IE but I require an automated solution.
I have tried using the following as well as HTTP::Request, nothing seems to work any suggestions would be appreciated, I have tried diffrnt things I found on... (7 Replies)
Discussion started by: bryanthomas
7 Replies
4. AIX
I have a Multithreaded program which is hanging on AIX.
OS Version: AIX 5.2 and thread library version : 5.2.0.75
We Initiate the process with 50 threads..when we are disconnecting from the process it hangs.There is lots of other stuff involved here.I am just sending the piece of the problem with... (0 Replies)
Discussion started by: hikrishn
0 Replies
5. UNIX for Advanced & Expert Users
Hello, are any of the encryption programs capable of true multi-threading ? Friend of mine tells me that he's been running some testing on Fedora 11 and that the kernel doesn't support multi-threading at that level.
I've been looking into TrueCrypt, encfs and both calm to support... (0 Replies)
Discussion started by: TehOne
0 Replies
6. Linux
Hello, are any of the encryption programs capable of true multi-threading ? Friend of mine tells me that he's been running some testing on Fedora 11 and that the kernel doesn't support multi-threading at that level.
I've been looking into TrueCrypt, encfs and both calm to support... (1 Reply)
Discussion started by: TehOne
1 Replies
7. Programming
Hello All :
I write a .c program to test the exactually resource the memory leak
as follows:
1 #include <stdio.h>
2 #define NUM 100000
3 void *Thread_Run(void * arg){
4 //TODO
5 //pthread_datch(pthread_self());
6 int socket= (int)arg;
7 ... (1 Reply)
Discussion started by: aobai
1 Replies
8. UNIX for Dummies Questions & Answers
Good morning. I have a piece of code that is currently taking multiple files and using the CAT.exe command to combine into one file that is then sorted in reverse order based on the 3rd field of the file, then displayed on screen. I am trying to change this so that the files are being combined into... (4 Replies)
Discussion started by: jaacmmason
4 Replies
9. Programming
I'm having a hard time figuring out how to manage deallocation of memory in multithreaded environments. Specifically what I'm having a hard time with is using a lock to protect a structure, but when it's time to free the structure, you have to unlock the lock to destroy the lock itself. Which will... (5 Replies)
Discussion started by: gngrwzrd
5 Replies
10. Shell Programming and Scripting
hey everyone,
I'm having some trouble breaking down some code. It's simple a control script that takes machines meant to be backed up from a list. Then according to that will run multi-threaded processes up until the specified thread limit.
for example if there are 4 machines to be backed up,... (2 Replies)
Discussion started by: terrell
2 Replies
LEARN ABOUT OPENSOLARIS
pthread_barrier_wait
pthread_barrier_wait(3C) Standard C Library Functions pthread_barrier_wait(3C)
NAME
pthread_barrier_wait - synchronize at a barrier
SYNOPSIS
cc -mt [ flag... ] file... [ library... ]
#include <pthread.h>
int pthread_barrier_wait(pthread_barrier_t *barrier);
DESCRIPTION
The pthread_barrier_wait() function synchronizes participating threads at the barrier referenced by barrier. The calling thread blocks
until the required number of threads have called pthread_barrier_wait() specifying the barrier.
When the required number of threads have called pthread_barrier_wait() specifying the barrier, the constant PTHREAD_BARRIER_SERIAL_THREAD
is returned to one unspecified thread and 0 is returned to each of the remaining threads. At this point, the barrier is reset to the state
it had as a result of the most recent pthread_barrier_init(3C) function that referenced it.
The constant PTHREAD_BARRIER_SERIAL_THREAD is defined in <pthread.h> and its value is distinct from any other value returned by
pthread_barrier_wait().
The results are undefined if this function is called with an uninitialized barrier.
If a signal is delivered to a thread blocked on a barrier, upon return from the signal handler the thread resumes waiting at the barrier if
the barrier wait has not completed (that is, if the required number of threads have not arrived at the barrier during the execution of the
signal handler); otherwise, the thread continues as normal from the completed barrier wait. Until the thread in the signal handler returns
from it, it is unspecified whether other threads may proceed past the barrier once they have all reached it.
A thread that has blocked on a barrier does not prevent any unblocked thread that is eligible to use the same processing resources from
eventually making forward progress in its execution.
Eligibility for processing resources is determined by the scheduling policy.
RETURN VALUES
Upon successful completion, the pthread_barrier_wait() function returns PTHREAD_BARRIER_SERIAL_THREAD for a single (arbitrary) thread syn-
chronized at the barrier and 0 for each of the other threads. Otherwise, an error number is returned to indicate the error.
ERRORS
The pthread_barrier_wait() function will fail if:
EINVAL The value specified by barrier does not refer to an initialized barrier object.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
pthread_barrier_destroy(3C), attributes(5), standards(5)
SunOS 5.11 30 Jan 2004 pthread_barrier_wait(3C)