Read the memory from both C program and C++ program simultaneously

[priyachari]

Hi ,

Can anyone suggest me how to read the contents from an Array from C program while the array is actually populated from another program in C++

More specifically, what i like to do is read some dynamic information from a file, populate into the memory so that both the C program and C++ program can access the runtime contents? Also, i'm working in an UNIX environment!

Thanks in Advance

[michaelb]

If this file is more or less static you may consider simply reading this file in each program.

If you really need to support in-memory communication between two (or more) processes, then read on System V IPC (Inter-Process Communication)

I think you can employ some of the IPC facilities, named pipes, or shared memory.

[priyachari]

Thx michael.

But i need it since, there will be a more than 1 request trying to read and write the file concurrently. Hence, i need the file content, say for eg code,descriptio n and count to be prepopulated into memory and be able to update the count concurrently. Also, the update can be performed either from C++ program or C program also.

Can u suggest me, if fork can be of any use in this case...or should i go for IPC. i tried to populate the content by always loading the array content repeatedly in the memory using an indefinite loop ...but i wasnt able to read the content from another call though...

Thanx in advance

[Motoma]

Thx michael.

But i need it since, there will be a more than 1 request trying to read and write the file concurrently. Hence, i need the file content, say for eg code,descriptio n and count to be prepopulated into memory and be able to update the count concurrently. Also, the update can be performed either from C++ program or C program also.

Can u suggest me, if fork can be of any use in this case...or should i go for IPC. i tried to populate the content by always loading the array content repeatedly in the memory using an indefinite loop ...but i wasnt able to read the content from another call though...

Thanx in advance

Are you writing both the C and the C++ program?

[priyachari]

Motoma,

Yes, both C and C++ program needs to be run and i'm writing both of them...

[Motoma]

Motoma,

Yes, both C and C++ program needs to be run and i'm writing both of them...

Here is a decent article on the matter.

[horace1]

Motoma,

Yes, both C and C++ program needs to be run and i'm writing both of them...

also have a look at
http://www.cs.cf.ac.uk/Dave/C/node27.html

for IPC pipes, semaphores, messages, shared memory, etc

[priyachari]

also have a look at
http://www.cs.cf.ac.uk/Dave/C/node27.html

for IPC pipes, semaphores, messages, shared memory, etc

Thanks a lot for the article. The sample seems to solve pretty much the problem...

[priyachari]

Here is a decent article on the matter.

Thanks Motoma...The article is really good...