58faf91453
* *
% remove brandings and homepage [1] from copyright header. Pass 1 - using script.
[1] nobody has access to it anymore AFAIK - and it's also just
a redirect since long
! update url in copyright header
; this should make the diff between 3.4 and 3.2 easier to manage
63 lines
1.7 KiB
Plaintext
63 lines
1.7 KiB
Plaintext
/*
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* demonstration/test code for modifying simple variable by different
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* threads with and without protection and also complex variables
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* like array without protection. Because each thread will access
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* different item in this array then it should be safe and our HVM
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* should make necessary internal protections automatically.
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*
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* Copyright 2008 Przemyslaw Czerpak <druzus / at / priv.onet.pl>
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*
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*/
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#ifdef __XHARBOUR__
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#xtranslate hb_threadStart( <x,...> ) => StartThread( <x> )
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#xtranslate hb_threadJoin( <x,...> ) => JoinThread( <x> )
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#endif
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#define N_THREADS 5
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static s_nVar1 := 0
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static s_nVar2 := 0
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static s_aCounters
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static s_hMutex
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proc main()
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local aThreads, i, lEnd, nSum
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? Version()
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? "Main start"
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s_aCounters := array( N_THREADS )
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aFill( s_aCounters, 0 )
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aThreads := {}
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s_hMutex := hb_mutexCreate()
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lEnd := .F.
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? "Starting threads: "
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for i := 1 to N_THREADS
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aadd( aThreads, hb_threadStart( @thFunc(), i, @lEnd ) )
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?? "<" + hb_ntos( i ) + ">"
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next
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? "Wait 5 seconds or hit any key..."
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inkey( 5 )
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lEnd := .T.
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? "Waiting for threads..."
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aEval( aThreads, {| x | hb_threadJoin( x ) } )
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? "Threads joined"
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nSum := 0
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aEval( s_aCounters, {| x | nSum += x } )
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? "Sum of thread local counters:", nSum
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? "Protected item result.......:", s_nVar2, ;
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iif( nSum == s_nVar2, "OK", "ERROR" )
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? "Unprotected item result.....:", s_nVar1, "*"
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? " * - can be different then local sum on real multi-CPU systems"
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? "End of main"
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return
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proc thFunc( nThread, lEnd )
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while ! lEnd
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s_nVar1++
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hb_mutexLock( s_hMutex )
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s_nVar2++
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hb_mutexUnLock( s_hMutex )
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s_aCounters[ nThread ]++
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enddo
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return
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