thread lock question

Ritesh Raj Sarraf rrs at researchut.com
Wed Oct 11 15:09:32 CEST 2006


Hi,

I have a question regarding locks in threads.
Following is the code example:

if download_file(foo, bar) == True:
        if some condition:
                do_something()
                if zip_bool:
                        ziplock.acquire()
                        try:
                                compress_the_file(zip_type_file, foo, bar)
                                os.unlink(foo) # Unlink it once it has been zipped
                        finally:
                                ziplock.release()
        if zip_bool:
                ziplock.acquire()
                try:
                        compress_the_file(zip_type_file, foo, bar)
                        os.unlink(foo)
                finally:
                        ziplock.release()

Basically, I'm testing for some condition, if that is True, do something and
then do the zipping. I'm also doing the zipping even if that's not true.

My question is, in a code example like this which is threaded, does the locking
mechanism work correctly ?
Or are two different locks being acquired ?

Thanks,
Ritesh
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"




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