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
8  2190  michaelb 534
Recognized Expert Contributor
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.
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 3,237
Recognized Expert Specialist
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?
Motoma,
Yes, both C and C++ program needs to be run and i'm writing both of them...
horace1 1,510
Recognized Expert Top Contributor
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
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...
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