[Opalvoip-svn] SF.net SVN: opalvoip:[24841] ptlib/trunk

[<rjo...@us...>]

Revision: 24841
          http://opalvoip.svn.sourceforge.net/opalvoip/?rev=24841&view=rev
Author:   rjongbloed
Date:     2010-10-29 04:07:24 +0000 (Fri, 29 Oct 2010)

Log Message:
-----------
Added mutex to make sure that globally unique identifiers are exactly that. If generated fast enough by multiple threads, could end up with the same ID twice.

Modified Paths:
--------------
    ptlib/trunk/src/ptclib/guid.cxx

Property Changed:
----------------
    ptlib/trunk/


Property changes on: ptlib/trunk
___________________________________________________________________
Modified: svn:mergeinfo
   - /opal/branches/v3_6:23595
/ptlib/branches/csoutheren/LalandeBranch1:23331-23333,23723
/ptlib/branches/v2_2:20746,20791,20827,22014,22942
/ptlib/branches/v2_4:21086,21094,21147,21160,21185,21281,21296,21305,21322,21337,21363,21467,21471-21472,21506,21508,21623,21695,21744,21746,21763,22241,22958,23045-23046,23061,23066,23712
/ptlib/branches/v2_6:22195,22243,22295,22304,22311,22317,22320,22356,22458,22509,22587,22601-22602,22611,22629,22633,22673,22681,22729,22731-22732,22736,22742,22848,22960,22992,23161,23163,23167,23169,23177,23239,23291,23298,23336,23429,23595,23823,23827,23873,24816
/ptlib/branches/v2_8:24034,24044,24046,24054,24060,24065,24084,24090,24113,24136,24142,24165-24166,24168,24172,24367,24372,24410,24540
   + /opal/branches/v3_6:23595
/ptlib/branches/Sirius_B:24839
/ptlib/branches/csoutheren/LalandeBranch1:23331-23333,23723
/ptlib/branches/v2_2:20746,20791,20827,22014,22942
/ptlib/branches/v2_4:21086,21094,21147,21160,21185,21281,21296,21305,21322,21337,21363,21467,21471-21472,21506,21508,21623,21695,21744,21746,21763,22241,22958,23045-23046,23061,23066,23712
/ptlib/branches/v2_6:22195,22243,22295,22304,22311,22317,22320,22356,22458,22509,22587,22601-22602,22611,22629,22633,22673,22681,22729,22731-22732,22736,22742,22848,22960,22992,23161,23163,23167,23169,23177,23239,23291,23298,23336,23429,23595,23823,23827,23873,24816
/ptlib/branches/v2_8:24034,24044,24046,24054,24060,24065,24084,24090,24113,24136,24142,24165-24166,24168,24172,24367,24372,24410,24540

Modified: ptlib/trunk/src/ptclib/guid.cxx
===================================================================
--- ptlib/trunk/src/ptclib/guid.cxx	2010-10-29 04:07:18 UTC (rev 24840)
+++ ptlib/trunk/src/ptclib/guid.cxx	2010-10-29 04:07:24 UTC (rev 24841)
@@ -51,6 +51,9 @@
 PGloballyUniqueID::PGloballyUniqueID()
   : PBYTEArray(GUID_SIZE)
 {
+  static PMutex mutex;
+  PWaitAndSignal wait(mutex);
+
   // Want time of UTC in 0.1 microseconds since 15 Oct 1582.
   PInt64 timestamp;
   static PInt64 deltaTime = PInt64(10000000)*24*60*60*


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