Threads and Mutex Post: 9798

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1. UNIX for Dummies Questions & Answers

mutex

Can anyone explain me what mutexes are in multithreading environment?

2. Shell Programming and Scripting

mutex in shell programing

A shell in crontab per 5 min write a file B shell in crontab per 6 min read a file how to lock the share file a ;avioid confilict in write and read? Thx : -)

3. Programming

Hi, I have two tasks 'Read' and 'Write' which reads and writes on a file "abc.txt" respectively. Now I need to restrict the Write operation on the file while Read is going on, But can allow two Reads at a time. ie. two Reads can happen simultaneously, but Write can't happen at Read is going on. ...

4. Programming

difference between Mutex and semaphores

Hi, can someone explain me the difference between mutex and semaphores? Thanks

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what is diff b/w semaphore and mutex

can u tell me what is the exact difference b/w mutex and semaphore and what is the diff b/w counting semaphore and binary semaphore amit

6. Shell Programming and Scripting

Mutex in Perl

Hello Everyone, I just joined this forum and this is my first post. I would like to know how can I impliment basic read/write locks in perl. I have a database (file) which can be accessed simultaneously but has to be locked while writing. If there is no such support in perl, my next...

7. Programming

Mutex will not work

I am trying to use mutex in my multi-tread project, but they don't seem to work. I have created a simple demonstration of the problem. This is NOT how I would use a mutex, only a demonstration of the problem: #include <stdio.h> #include <pthread.h> int main() { int val; ...

8. Programming

Mutex lock question

Hi all, I have a scenario where I need to use the mutex locks. The mutex locks are working fine, but sometimes I am getting into the dead lock situation. Below is the summary of my code : MUTEX LOCK performTask(); MUTEX UNLOCK. In some cases I get into the situation where...

9. Programming

Can Mutex be replaced with anything?

Hi All, To avoid race condition, instead of using mutex, semaphore, spinlock etc.... Is there any other mechanism by which we can avoid race condition in an multi-threading environment. -Thanks

10. Programming

Number of threads waiting on a pthread mutex/rwlock

Using pthreads is there a way to determine how many threads are waiting on a locked resource? I mean, once a shared resource is protected using e.g. pthread_rwlock_t or pthread_mutex_t one thread grabs the lock and other threads will go to sleep waiting for the resource to be available again. Is...

LEARN ABOUT MOJAVE

uri::url

URI::URL(3)						User Contributed Perl Documentation					       URI::URL(3)

NAME

       URI::URL - Uniform Resource Locators

SYNOPSIS

	$u1 = URI::URL->new($str, $base);
	$u2 = $u1->abs;

DESCRIPTION

       This module is provided for backwards compatibility with modules that depend on the interface provided by the "URI::URL" class that used to
       be distributed with the libwww-perl library.

       The following differences exist compared to the "URI" class interface:

       o  The URI::URL module exports the url() function as an alternate constructor interface.

       o  The constructor takes an optional $base argument.  The "URI::URL" class is a subclass of "URI::WithBase".

       o  The URI::URL->newlocal class method is the same as URI::file->new_abs.

       o  URI::URL::strict(1)

       o  $url->print_on method

       o  $url->crack method

       o  $url->full_path: same as ($uri->abs_path || "/")

       o  $url->netloc: same as $uri->authority

       o  $url->epath, $url->equery: same as $uri->path, $uri->query

       o  $url->path and $url->query pass unescaped strings.

       o  $url->path_components: same as $uri->path_segments (if you don't consider path segment parameters)

       o  $url->params and $url->eparams methods

       o  $url->base method.  See URI::WithBase.

       o  $url->abs and $url->rel have an optional $base argument.  See URI::WithBase.

       o  $url->frag: same as $uri->fragment

       o  $url->keywords: same as $uri->query_keywords

       o  $url->localpath and friends map to $uri->file.

       o  $url->address and $url->encoded822addr: same as $uri->to for mailto URI

       o  $url->groupart method for news URI

       o  $url->article: same as $uri->message

SEE ALSO

       URI, URI::WithBase

COPYRIGHT

       Copyright 1998-2000 Gisle Aas.

perl v5.18.2							    2012-02-11							       URI::URL(3)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

mutex

Discussion started by: sagar

2. Shell Programming and Scripting

mutex in shell programing

Discussion started by: zz_xm

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How to handle mutex lock?

Discussion started by: satheeshalle