473,977 Members | 2,830 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Semaphores and .NET

I have a C# application and a VB6 application that need to share a dialup
connection to the internet. Don't ask why, this is one of those corporate "do
or die" things.

The only way I can see to do this is by using the combination of a MUTEX to
create a Cross-application Singleton for the Dialing operation and a Named
Semphore that can keep a count of how many processes are currently sharing
the connection from the client's workstation into our corporate VPN extranet.
I am trying to find an example of how to manage semaphores in C# in a class.
I will have to translate the same into the VB6 for the legacy app.

Using .NET 2.0 is not an option, they won't let me use a BETA. Neither is
remoting. I have to make the access sharable between executables modules.
Does any one have any ideas.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

Nov 17 '05 #1
34 6338
Maybe this link would be helpful to you
http://weblogs.asp.net/tspascoal/arc.../16/59340.aspx

Sincerely,
Bobby

Nov 17 '05 #2
Bobby;

Again, I don't think any one understands that these are 2 spearate
executables. Monitor won't do it. It has to be something similar to MUTEX but
will allow a certain number of executables to share the Connection to the
internet and will prevent which ever one completes first from hanging up on
the second one. The MUTEX would only prevent one from dialing while the other
one is dialing. The Semaphore tracks how many active transfers are going on
simultaneously.

Please any more ideas.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"bo*********@gm ail.com" wrote:
Maybe this link would be helpful to you
http://weblogs.asp.net/tspascoal/arc.../16/59340.aspx

Sincerely,
Bobby

Nov 17 '05 #3
A week ago, I posted a sample implementation of semaphore using Win32 API.
This solution can be adjusted so the semaphore handle can be shared among
processes, which will suit your needs, if I understand what you need to
accomplish.
This is were the implementation is posted
http://www.pcreview.co.uk/forums/pri....php?t=2099193
have a look at MSDN for settings you need to change when handle should be
shared among processes.
"jinksk" <ji****@discuss ions.microsoft. com> wrote in message
news:78******** *************** ***********@mic rosoft.com...
Bobby;

Again, I don't think any one understands that these are 2 spearate
executables. Monitor won't do it. It has to be something similar to MUTEX but will allow a certain number of executables to share the Connection to the
internet and will prevent which ever one completes first from hanging up on the second one. The MUTEX would only prevent one from dialing while the other one is dialing. The Semaphore tracks how many active transfers are going on simultaneously.

Please any more ideas.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"bo*********@gm ail.com" wrote:
Maybe this link would be helpful to you
http://weblogs.asp.net/tspascoal/arc.../16/59340.aspx

Sincerely,
Bobby

Nov 17 '05 #4
Bobby;

Again, I don't think any one understands that these are 2 spearate
executables. Monitor won't do it. It has to be something similar to MUTEX but
will allow a certain number of executables to share the Connection to the
internet and will prevent which ever one completes first from hanging up on
the second one. The MUTEX would only prevent one from dialing while the other
one is dialing. The Semaphore tracks how many active transfers are going on
simultaneously.

Please any more ideas.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"bo*********@gm ail.com" wrote:
Maybe this link would be helpful to you
http://weblogs.asp.net/tspascoal/arc.../16/59340.aspx

Sincerely,
Bobby

Nov 17 '05 #5
A week ago, I posted a sample implementation of semaphore using Win32 API.
This solution can be adjusted so the semaphore handle can be shared among
processes, which will suit your needs, if I understand what you need to
accomplish.
This is were the implementation is posted
http://www.pcreview.co.uk/forums/pri....php?t=2099193
have a look at MSDN for settings you need to change when handle should be
shared among processes.
"jinksk" <ji****@discuss ions.microsoft. com> wrote in message
news:78******** *************** ***********@mic rosoft.com...
Bobby;

Again, I don't think any one understands that these are 2 spearate
executables. Monitor won't do it. It has to be something similar to MUTEX but will allow a certain number of executables to share the Connection to the
internet and will prevent which ever one completes first from hanging up on the second one. The MUTEX would only prevent one from dialing while the other one is dialing. The Semaphore tracks how many active transfers are going on simultaneously.

Please any more ideas.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"bo*********@gm ail.com" wrote:
Maybe this link would be helpful to you
http://weblogs.asp.net/tspascoal/arc.../16/59340.aspx

Sincerely,
Bobby

Nov 17 '05 #6
I guess you should consider me dumb as dirt, because I can't see how I can
implement this in such a way that all processes will have access to the same
named semaphore when the only constructor that implements the name is
protected in your example. I am not being factious, I just don't understand.
Most of this is brand new to me and I seem to keep getting thrown the
projects that would even give MSDN MVP's pause for thought.

Would you please explain this a little further, Lebesgue, so that even a
clod like me could understand.

Thanks.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"Lebesgue" wrote:
A week ago, I posted a sample implementation of semaphore using Win32 API.
This solution can be adjusted so the semaphore handle can be shared among
processes, which will suit your needs, if I understand what you need to
accomplish.
This is were the implementation is posted
http://www.pcreview.co.uk/forums/pri....php?t=2099193
have a look at MSDN for settings you need to change when handle should be
shared among processes.
"jinksk" <ji****@discuss ions.microsoft. com> wrote in message
news:78******** *************** ***********@mic rosoft.com...
Bobby;

Again, I don't think any one understands that these are 2 spearate
executables. Monitor won't do it. It has to be something similar to MUTEX

but
will allow a certain number of executables to share the Connection to the
internet and will prevent which ever one completes first from hanging up

on
the second one. The MUTEX would only prevent one from dialing while the

other
one is dialing. The Semaphore tracks how many active transfers are going

on
simultaneously.

Please any more ideas.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"bo*********@gm ail.com" wrote:
Maybe this link would be helpful to you
http://weblogs.asp.net/tspascoal/arc.../16/59340.aspx

Sincerely,
Bobby


Nov 17 '05 #7
I guess you should consider me dumb as dirt, because I can't see how I can
implement this in such a way that all processes will have access to the same
named semaphore when the only constructor that implements the name is
protected in your example. I am not being factious, I just don't understand.
Most of this is brand new to me and I seem to keep getting thrown the
projects that would even give MSDN MVP's pause for thought.

Would you please explain this a little further, Lebesgue, so that even a
clod like me could understand.

Thanks.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"Lebesgue" wrote:
A week ago, I posted a sample implementation of semaphore using Win32 API.
This solution can be adjusted so the semaphore handle can be shared among
processes, which will suit your needs, if I understand what you need to
accomplish.
This is were the implementation is posted
http://www.pcreview.co.uk/forums/pri....php?t=2099193
have a look at MSDN for settings you need to change when handle should be
shared among processes.
"jinksk" <ji****@discuss ions.microsoft. com> wrote in message
news:78******** *************** ***********@mic rosoft.com...
Bobby;

Again, I don't think any one understands that these are 2 spearate
executables. Monitor won't do it. It has to be something similar to MUTEX

but
will allow a certain number of executables to share the Connection to the
internet and will prevent which ever one completes first from hanging up

on
the second one. The MUTEX would only prevent one from dialing while the

other
one is dialing. The Semaphore tracks how many active transfers are going

on
simultaneously.

Please any more ideas.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"bo*********@gm ail.com" wrote:
Maybe this link would be helpful to you
http://weblogs.asp.net/tspascoal/arc.../16/59340.aspx

Sincerely,
Bobby


Nov 17 '05 #8
I guess you should consider me dumb as dirt, because I can't see how I can
implement this in such a way that all processes will have access to the same
named semaphore when the only constructor that implements the name is
protected in your example. I am not being factious, I just don't understand.
Most of this is brand new to me and I seem to keep getting thrown the
projects that would even give MSDN MVP's pause for thought.

Would you please explain this a little further, Lebesgue, so that even a
clod like me could understand.

Thanks.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"Lebesgue" wrote:
A week ago, I posted a sample implementation of semaphore using Win32 API.
This solution can be adjusted so the semaphore handle can be shared among
processes, which will suit your needs, if I understand what you need to
accomplish.
This is were the implementation is posted
http://www.pcreview.co.uk/forums/pri....php?t=2099193
have a look at MSDN for settings you need to change when handle should be
shared among processes.
"jinksk" <ji****@discuss ions.microsoft. com> wrote in message
news:78******** *************** ***********@mic rosoft.com...
Bobby;

Again, I don't think any one understands that these are 2 spearate
executables. Monitor won't do it. It has to be something similar to MUTEX

but
will allow a certain number of executables to share the Connection to the
internet and will prevent which ever one completes first from hanging up

on
the second one. The MUTEX would only prevent one from dialing while the

other
one is dialing. The Semaphore tracks how many active transfers are going

on
simultaneously.

Please any more ideas.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"bo*********@gm ail.com" wrote:
Maybe this link would be helpful to you
http://weblogs.asp.net/tspascoal/arc.../16/59340.aspx

Sincerely,
Bobby


Nov 17 '05 #9
I guess you should consider me dumb as dirt, because I can't see how I can
implement this in such a way that all processes will have access to the same
named semaphore when the only constructor that implements the name is
protected in your example. I am not being factious, I just don't understand.
Most of this is brand new to me and I seem to keep getting thrown the
projects that would even give MSDN MVP's pause for thought.

Would you please explain this a little further, Lebesgue, so that even a
clod like me could understand.

Thanks.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"Lebesgue" wrote:
A week ago, I posted a sample implementation of semaphore using Win32 API.
This solution can be adjusted so the semaphore handle can be shared among
processes, which will suit your needs, if I understand what you need to
accomplish.
This is were the implementation is posted
http://www.pcreview.co.uk/forums/pri....php?t=2099193
have a look at MSDN for settings you need to change when handle should be
shared among processes.
"jinksk" <ji****@discuss ions.microsoft. com> wrote in message
news:78******** *************** ***********@mic rosoft.com...
Bobby;

Again, I don't think any one understands that these are 2 spearate
executables. Monitor won't do it. It has to be something similar to MUTEX

but
will allow a certain number of executables to share the Connection to the
internet and will prevent which ever one completes first from hanging up

on
the second one. The MUTEX would only prevent one from dialing while the

other
one is dialing. The Semaphore tracks how many active transfers are going

on
simultaneously.

Please any more ideas.
--
Kenneth A. Jinks, Jr.
Lead Project Software Engineer
LabCorp CPG - LCM Development
Huntsville, AL

"bo*********@gm ail.com" wrote:
Maybe this link would be helpful to you
http://weblogs.asp.net/tspascoal/arc.../16/59340.aspx

Sincerely,
Bobby


Nov 17 '05 #10

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

1
1890
by: Nish | last post by:
Hi, I have some code, to which I added usage of posix semaphores. I am working on a solaris platform. After doing that, my process becomes unkillable, that is it will not terminate if sent a SIGTERM signal. I am not ignoring that signal. Just adding this code related to semaphores seems to be causing this problem. None of my threads is sleeping indefinitely on any semaphore wait. Any help will be appreciated. If this is not the...
1
2187
by: Mehmet Turker | last post by:
Hi; In a research project, I want to use shared memory with semaphores. First I have to create an environment for interprocess messaging. I'm thinking of having a main process which creates a big shared memory and manage all messages which are sent by objects inside the environment. Is this method effective for a high loaded messaging area? I heard about using ports can cause loss of data. And, is it ok to have a main process which will...
2
2305
by: schneider jp | last post by:
Hi everybody For a project of system programming, we need to use semaphores, but i got some pbs... when I compile, i get perror with sem_open("machin", O_CREAT, 0666, 0); and perror says function not implemented ... on a sun, i get perror : Invalid argument... another question : what's the max number of semaphores a process can create??
11
3029
by: FiLH | last post by:
Hello, I would like to know if posix semaphores are inter processes or just semaphores for threads inside the same process. I have not seen it defined in the posix specification I have found, but I have maybe missed something. Thanks in advance.
1
556
by: jinksk | last post by:
I have a C# application and a VB6 application that need to share a dialup connection to the internet. Don't ask why, this is one of those corporate "do or die" things. The only way I can see to do this is by using the combination of a MUTEX to create a Cross-application Singleton for the Dialing operation and a Named Semphore that can keep a count of how many processes are currently sharing the connection from the client's workstation...
1
4725
by: Edwin New | last post by:
I have a requirement to run two separate postmasters on the one machine. It looks like they compete for resources (semaphores) so won't run concurrently. I compiled twice, specifying different ports and home directories: ./configure --with-java --with-pgport=6100 --prefix=/usr/local/teprpg01 make etc...
5
2621
by: Steven Spencer | last post by:
Hi, I'm doing an IT degree at university, and my lecturer's do not teach m$ technologies. I was wondering if anyone could point me to the implementation of mutex's and semaphores in .net? Or the microsoft equivalent of them.
0
1154
arne
by: arne | last post by:
Hi, I am using Perl ithreads. The threads I create shall access a shared hash. In order to control access to the hash, I would like to use a semaphore. (BTW, does the hash need the protection at all if I can make sure that all threads use different keys?) Semaphores in Perl are provided by the (obsolete?) "Thread" module, which has been replaced by the "threads" module in recent versions. But in the latter, there are only locks, no...
0
1873
by: The Advocate | last post by:
Hello, how can we implement semaphores using monitors. I got how we can do it the way round. I did alot of search but couldnt find any implementation of semaphores using monitors,. Can anyone help me on this plz Thank you!
5
2714
by: davidcollins001 | last post by:
Hi, Firstly please excuse the long ramblingness. I need some conceptual help, I am trying to make two programs that are exactly the same but take it in turns to execute something, so the output looks something like the following: setup semaphores, etc . . proc 1 doing first thing proc 2 doing next thing
0
10356
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
10172
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
11409
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
11578
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
10913
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
10085
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
8464
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
6418
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
2
4732
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.