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Date: 10/19/00
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hholzgra Thu Oct 19 06:11:07 2000 EDT
Modified files:
/phpdoc/en/functions filesystem.xml
Log:
added a warning about using flock() in multithreaded
environments (taken from a thread on the german PHP
mailing list)
Index: phpdoc/en/functions/filesystem.xml
diff -u phpdoc/en/functions/filesystem.xml:1.41 phpdoc/en/functions/filesystem.xml:1.42
--- phpdoc/en/functions/filesystem.xml:1.41 Sun Oct 1 16:12:15 2000
+++ phpdoc/en/functions/filesystem.xml Thu Oct 19 06:11:07 2000
@@ -998,6 +998,15 @@
<function>Flock</function> returns true on success and false on
error (e.g. when a lock could not be acquired).
</simpara>
+ <warning>
+ <para>
+ On most operation systems <function>flock</function> is implemented
+ at the process level. When using a multithreaded server API like
+ ISAPI you cannot rely on <function>flock</function> to protect
+ files against other PHP scripts running in parallel threads of the
+ same server instance!
+ </para>
+ </warning>
</refsect1>
</refentry>
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