Maurilio, if you test mtcomplexshare.prg without the change in my commit, you can obtain GPFs or Internal Error (Premature Pointer Release detected).
The problem in low level is similar to problem in high level that you see executing mtcomplexshare.prg without mutex. Some platforms or compilers do not have functions for atomic increment and decrement, but some compilers create atomic increment and decrement when using vars volatile. *Walter Negro* /Desarrollo e Investigación/ VsTour - Softmagic S.R.L. <mailto:[EMAIL PROTECTED]> ------------------------------------------------------------------------ *::* * VSTour.COM <http://www.vstour.com> * *::* Maurilio Longo escribió: > Walter, > > I'm not sure I'm understanding this, but I did a test with mtcomplexshare.prg > and I see that nGlobalCounter is protected by a mutex lock/unlock sequence. > > If I remove those mutex calls on OS/2 with GCC at the end the result shows big > differences. > > --------8<---------------- > Thread 1 - LocalCounter= 5449444 > Thread 2 - LocalCounter= 5469999 > Total 10919443 > > GlobalCounter= 6345520 > > Difference 4573923 > (E:\repos2\xharbour\tests) > -------->8---------------- > > See attachment. > > Maurilio. > > > > Walter Negro wrote: > >> 2008-06-28 15:25 UTC-0300 Walter Negro <anegro/at/overnet.com.ar> >> * include\hbdefs.h >> * include\hbvmpub.h >> * include\thread.h >> * source\rtl\hbxml.c >> * source\vm\arrays.c >> * source\vm\arrayshb.c >> * source\vm\codebloc.c >> * source\vm\fastitem.c >> * source\vm\fm.c >> * source\vm\garbage.c >> * source\vm\hvm.c >> * source\vm\itemapi.c >> * source\vm\thread.c >> * tests\mtcomplexshare.prg >> * Added atomic or volatile increment and decrement of counters of >> complex types and structures. >> Now is safe to share complex data type in diferent threads if C >> compiler or OS support >> function or create ASM thread-safe to inc/dec. >> NOTE: Atomic increment and decrement need counter memory aligned >> and 32 bits of lenght. >> >> Walter Negro >> >> >> ------------------------------------------------------------------------ >> >> >> No virus found in this outgoing message. >> Checked by AVG. >> Version: 8.0.101 / Virus Database: 270.4.2/1523 - Release Date: 28/06/2008 >> 07:00 a.m. >> >> >> ------------------------------------------------------------------------ >> >> ------------------------------------------------------------------------- >> Check out the new SourceForge.net Marketplace. >> It's the best place to buy or sell services for >> just about anything Open Source. >> http://sourceforge.net/services/buy/index.php >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> xHarbour-developers mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/xharbour-developers >> > > ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ xHarbour-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/xharbour-developers
