Doc #54129 [Opn->Csd]: using LOCK_NB whilst aquiring a lock with flock() does work on windows
| From: | cmb@php.net | Date: | Wed, 18 Nov 2020 15:01:54 +0000 |
| Subject: | Doc #54129 [Opn->Csd]: using LOCK_NB whilst aquiring a lock with flock() does work on windows | ||
| References: | 1 | Groups: | php.doc.bugs |
| Request: | Send a blank email to doc-bugs+get-18127@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=54129&edit=1
ID: 54129
Updated by: cmb@php.net
Reported by: scope at planetavent dot de
Summary: using LOCK_NB whilst aquiring a lock with flock()
does work on windows
-Status: Open
+Status: Closed
Type: Documentation Problem
Package: Filesystem function related
Operating System: Windows Server 2008 (x64)
PHP Version: 5.3.5
-Assigned To:
+Assigned To: cmb
Block user comment: N
Private report: N
New Comment:
These issues have already been fixed in the meantime.
Previous Comments:
------------------------------------------------------------------------
[2011-03-01 16:59:27] scope at planetavent dot de
Description:
------------
The online documentation states that LOCK_NB to achieve a non-blocking lock-attempt is not supported
on windows.
The given test script, if started twice, just returns stating that the lock can not be aquired.
Therefor, since it does not block, using LOCK_NB seems to work on windows and the documentation
should be updated accordingly. If this is not the expected behaviour, the documentation should
reflect the possible situations, where using LOCK_NB does indeed not work.
Furthermore the statement "The automatic unlocking when the file's resource handle is
closed was removed. Unlocking now always has to be done manually." should be checked. My test
show that closing the file pointer with fclose() does release the lock.
Test script:
---------------
<?php
$lockfile = 'dummy.lock';
$fp = fopen( $lockfile, 'w+' );
if ( !$fp )
{
echo "unable to open lockfile\n";
exit;
}
if ( !flock( $fp, LOCK_EX | LOCK_NB ) )
{
echo "unable to aquire lock\n";
exit;
}
sleep( 10 );
Expected result:
----------------
According to documentation, script should block (since LOCK_NB is not supported)
Actual result:
--------------
flock does not block
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=54129&edit=1