file read/write synchronization: advice needed

[Junpei]

problem: I have a program A that writes (overwrite) to a file 5
times/second (the results of a realtime calculation); i want several
other programs B through E to occasionally read that file to see what
the current results are (I only need the current results). how do i
keep the programs B to E from trying to read while program A is
writing? or is there a better solution than writing to a file? hoping
for an easy solution... i'm on linux.
thanks in advance,
Junpei

 

[Ben Morrow]

Quoth (e-mail address removed) (Junpei):

problem: I have a program A that writes (overwrite) to a file 5
times/second (the results of a realtime calculation); i want several
other programs B through E to occasionally read that file to see what
the current results are (I only need the current results). how do i
keep the programs B to E from trying to read while program A is
writing? or is there a better solution than writing to a file? hoping
for an easy solution... i'm on linux.

perldoc -f flock

Ben

 

[Tad McClellan]

Quoth (e-mail address removed) (Junpei):

perldoc -f flock

See also:

perldoc -q "\block"