On Friday, December 13, 2002, at 09:06 AM, <[EMAIL PROTECTED]> wrote:
On Fri, 13 Dec 2002, Aaron Bannert wrote:
On Thursday, December 12, 2002, at 12:34 PM, Greg Ames wrote:
I dug into APR locks a little bit. The apr_global_mutex_* functions
turn into two separate syscalls, with #if APR_HAS_THREADS around the
thread mutexing. So unfortunately they wouldn't save us any syscalls
:-( :-( But they might save a little bit of function call overhead.
Another interesting place to look is in
srclib/apr/include/arch/unix/apr_private.h .
There are several xxxx_IS_GLOBAL symbols for various serialization
mechanisms. On my Linux box, all of them are #undef'ed and commented
out, including fcntl and flock which are the two choices for
apr_file_lock. Madhu, could you take a look there and see what
you've
got?
You really shouldn't use those xxxx_IS_GLOBAL symbols for anything
outside of APR.
They are there for platforms like s390 where some of the file-based
locks do actually
serialize multiple threads within multiple processes.
Um, then why in the world are those symbols in a public header file?
They
are only ever used inside of APR, so they should exist in
apr_private.h,
not apr.h.
They are in apr_private.h.
-aaron
