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?

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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. ...

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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

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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 NETBSD

url

URL(4)							   BSD Kernel Interfaces Manual 						    URL(4)

NAME

     url -- Realtek RTL8150L USB Ethernet driver

SYNOPSIS

     url*    at uhub?
     urlphy* at mii?

DESCRIPTION

     The url driver provides support for USB Ethernet adapters based on the Realtek RTL8150L USB-ether bridge chip.

     The url driver supports the following adapters:

	   CompUSA USBKR100
	   GreenHouse GH-USB100B
	   Melco Inc. LUA-KTX
	   Sitecom LN013

     For more information on configuring this device, see ifconfig(8).

DIAGNOSTICS

     url%d: watchdog timeout  A packet was queued for transmission and a transmit command was issued, however the device failed to acknowledge the
     transmission before a timeout expired.

     url%d: no memory for rx list  The driver failed to allocate an mbuf for the receiver ring.

SEE ALSO

     arp(4), mii(4), netintro(4), usb(4), ifconfig(8)

HISTORY

     The url device driver first appeared in NetBSD 1.6.

AUTHORS

     The url driver was written by Shingo WATANABE <nabe@nabechan.org>.

BSD
								September 18, 2006							       BSD

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

mutex

Discussion started by: sagar

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mutex in shell programing

Discussion started by: zz_xm

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How to handle mutex lock?

Discussion started by: satheeshalle