The main purpose of a function is to avoid code repetition and perform a specific task. Based on that definition, using a function to only return a value is a bad design.
In that context I think is better a good readability in the code than to save several bytes of memory. We are in , optimization is good but this type of micro-optimization is simply ridiculous. Tags: function , php. If you are using perl 5. See the Apache::Resource module for ways to control httpd processes. See Choosing MaxClients. Most likely the two have been built against different glibc versions, which have incompatible struct dirent.
The value of PerlFreshRestart is irrelevant at this point. Unfortunately, not all perl modules are robust enough to survive reload. For them this is an unusual situation. PerlFreshRestart does not much more than:. Besides that, it flushes the Apache::Registry cache, and empties any dynamic stacked handlers e. Some users, who had turned PerlFreshRestart On , reported having segfaults, others have seen no problems starting the server, no errors written to the logs, but no server running after a restart.
Most of the problems have gone away when it was turned Off. That's a mandatory warning inside Perl which happens only if you modify your script and Apache::Registry reloads it. Perl is warning you that the subroutine s were redefined. It is mostly harmless. If you don't like seeing these warnings, just kill -USR1 graceful restart Apache when you modify your scripts. You aren't supposed to see these warnings if you don't modify the code with perl 5.
If you still experience a problem with code within a CGI script, moving all the code into a module or a library and require ing it should solve the problem. This problem is caused when a client drops the connection while httpd is in the middle of a write.
This is fixed by the Apache::SIG module which is called by default. It is possible that this operation may take a long time to finish, causing problems during a restart.
See the section " Speeding up the Apache Termination and Restart " for more information. RedHat 8 and 9 ship Perl with a locale setting that breaks perl. Since OpenBSD 3. A proper chroot 2 environment must be setup for the default chrooted behavior to work. The -u option to httpd disables the chroot behavior, and returns the httpd to the expanded "unsecure" behavior.
See the OpenBSD httpd 8 man page. For more information see section Apache loads all Apache modules twice, to make sure the server will successfully restart when asked to. This flag disables all PerlRequire and PerlModule statements on the first load, so they can succeed on the second load. Without that flag, the second load fails. HP-UX This issue is known to happen when perl's.
One solution is to upgrade to a recent version of Perl 5. Have comments? Please send them to the modperl users mailing list. Success Stories. Reporting Bugs. Getting Help. Mailing Lists. Maillist Subscription. Maillist Archives. The source. The 1. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses.
Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Linked Related Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled. But the reason why we use the heap is to use GC, which eventually recycles the object. But if the type is object reference, perhaps the only feasible way to implement such constant is to store it in the memory so that copying GC can update it when the referenced object is moved. Non-copying GC sucks, because the VM will eventually die of heap fragmentation.
You know, C programmers are responsible for memory management. But if the GC ends up modifying the machine code to fix the reference, it will be too painful. If we really need some permanent global memory space, Mu has another top-level definition: global cells, i. Global cells are memory locations: they are mutable. They can be loaded and stored, and they are permanent. Just store an object reference in a global cell and it has all the benefits of constant references.
For other references, constant function reference is unnecessary because the name of the function is already a constant function reference. Stacks are similar to heap objects. Mu support constants of non-hybrid composite types, too. A composite constant is constructed by referring to other constants.
0コメント