Description:
------------
Using WinCache 1.3.7.4
Notice a number of error message regarding abandoned mutex in the php error file.

[16-Jun-2015 06:39:55 Europe/Berlin] PHP Fatal error:  WINCACHE: lock_writelock: acquired abandoned mutex Global\FILELIST_CACHE_5.4_1.3.7.4_1_0_276545_A. Something bad happend in another process! in D:\Moodle\lib\setup.php on line 586

[27-Jun-2015 08:06:22 Europe/Berlin] PHP Fatal error:  Failure in Wincache[3776] allocate_memory: Segment free list corrupt.
 in D:\Moodle\lib\filelib.php on line 1980

[27-Jun-2015 08:39:25 Europe/Berlin] PHP Fatal error:  WINCACHE: lock_writelock: acquired abandoned mutex Global\FILELIST_SEGMENT_5.4_1.3.7.4_1_0_276545_X. Something bad happend in another process! in Unknown on line 0

[27-Jun-2015 08:39:25 Europe/Berlin] PHP Fatal error:  WINCACHE: lock_writelock: acquired abandoned mutex Global\FILELIST_SEGMENT_5.4_1.3.7.4_1_0_276545_X. Something bad happend in another process! in Unknown on line 0



There are also some Windows-Eventlog Errors. But don't fit to the error message date in php-error log.

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name="Application Error" /> 
  <EventID Qualifiers="0">1000</EventID> 
  <Level>2</Level> 
  <Task>100</Task> 
  <Keywords>0x80000000000000</Keywords> 
  <TimeCreated SystemTime="2015-06-26T05:47:41.000000000Z" /> 
  <EventRecordID>43587</EventRecordID> 
  <Channel>Application</Channel> 
  <Computer>LISSVMOODLE01.zdv.liebherr.i</Computer> 
  <Security /> 
  </System>
- <EventData>
  <Data>php-cgi.exe</Data> 
  <Data>5.4.42.0</Data> 
  <Data>5553ede6</Data> 
  <Data>php_wincache.dll</Data> 
  <Data>1.3.7.4</Data> 
  <Data>5500a3f0</Data> 
  <Data>c0000005</Data> 
  <Data>000144c8</Data> 
  <Data>12d4</Data> 
  <Data>01d0afc4e2bb46d1</Data> 
  <Data>C:\Program Files (x86)\php\php-cgi.exe</Data> 
  <Data>C:\Program Files (x86)\php\ext\php_wincache.dll</Data> 
  <Data>db470960-1bc6-11e5-8297-0050569614ab</Data> 
  </EventData>
  </Event>

Test script:
---------------
It happen randomly. No test script to demonstrates the bug.

Expected result:
----------------
No crash

Actual result:
--------------
HTTP-Status 500