Olá!
Não precisa exclusivamente de MT para rodar tarefas em segundo plano.
Código: Selecionar todos
#include "hbmemory.ch"
PROCEDURE Main()
LOCAL nH1, nH2, nH3, nH4
LOCAL n := 0
LOCAL aSign := { "|", "/", "-", "\" }
LOCAL nPrev := Seconds()
CLS
? " Time: Memory used: Milliseconds elapsed"
?
? "Can you see it ??? :) Press any key or wait 30 seconds"
?
?
@ 10, 2 SAY "Memory before TEST() call" + Str( Memory( HB_MEM_USED ) )
TEST()
@ 11, 2 SAY "Memory after TEST() and before collecting" + Str( Memory( HB_MEM_USED ) )
hb_gcAll()
@ 12, 2 SAY "Memory after collecting" + Str( Memory( HB_MEM_USED ) )
nH1 := hb_idleAdd( {|| hb_DispOutAt( 0, 1, Time() ) } )
nH2 := hb_idleAdd( {|| TEST(), hb_DispOutAt( 0, 21, Memory( HB_MEM_USED ) ) } )
nH3 := hb_idleAdd( {|| iif( n == 4, n := 1, n++ ), hb_DispOutAt( 0, 41, aSign[ n ] ) } )
nH4 := hb_idleAdd( {|| hb_DispOutAt( 0, 61, 1000 * ( Seconds() - nPrev ) ), nPrev := Seconds() } )
? ValType( nH1 ), nH1, ValType( nH2 ), nH2, ValType( nH3 ), nH3, ValType( nH4 ), nH4
Inkey( 30 )
IF ! Empty( nH3 )
@ 14, 2 SAY "Delete task 3: " + hb_ValToStr( nH3 )
hb_idleDel( nH3 )
ENDIF
IF ! Empty( nH2 )
@ 15, 2 SAY "Delete task 2: " + hb_ValToStr( nH2 )
hb_idleDel( nH2 )
ENDIF
IF ! Empty( nH1 )
@ 16, 2 SAY "Delete task 1: " + hb_ValToStr( nH1 )
hb_idleDel( nH1 )
ENDIF
IF ! Empty( nH4 )
@ 17, 2 SAY "Delete task 4: " + hb_ValToStr( nH4 )
hb_idleDel( nH4 )
ENDIF
@ 18, 2 SAY "Memory after idle states" + Str( Memory( HB_MEM_USED ) )
hb_gcAll()
@ 19, 2 SAY "Memory after collecting" + Str( Memory( HB_MEM_USED ) )
RETURN
STATIC PROCEDURE TEST()
LOCAL a, b, c
LOCAL cb
a := Array( 3 )
b := Array( 3 )
c := Array( 3 )
a[ 1 ] := a
a[ 2 ] := b
a[ 3 ] := c
b[ 1 ] := a
b[ 2 ] := b
b[ 3 ] := c
c[ 1 ] := a
c[ 2 ] := b
c[ 3 ] := c
cb := {| x | x := cb }
Eval( cb )
RETURN
HB_IDLEADD()
Adds the background task.
Syntax
HB_IDLEADD( <bAction> ) --> nHandle
Arguments
<bAction> is a codeblock that will be executed during idle states. There are no arguments passed to this codeblock during evaluation.
Returns
<nHandle> The handle (an integer value) that identifies the task. This handle can be used for deleting the task.
Description
HB_IDLEADD() adds a passed codeblock to the list of background tasks that will be evaluated during the idle states. There is no limit for the number of tasks.
Examples
nTask := hb_idleAdd( {|| SayTime() } )
Saudações,
Itamar M. Lins Jr.
