📄 waitforsingleobject_problem.mht
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<DIV class=3DpostTitle><A=20
href=3D"http://blog.csdn.net/egxsun/articles/1210398.aspx"><IMG =
height=3D13=20
src=3D"http://blog.csdn.net/images/zhuan.gif" width=3D15=20
border=3D0> WaitForSingleObject=E5=92=8CWaitForMultipleObjects=E4=BD=
=BF=E7=94=A8=E8=AF=A6=E8=A7=A3</A> </DIV>
<DIV class=3DpostText>
<P><BR>WaitForSingleObject=E7=9A=84=E7=94=A8=E6=B3=95</P>
<P>DWORD WaitForSingleObject(<BR> HANDLE hHandle,<BR> DWORD=20
dwMilliseconds<BR>);<BR>=E5=8F=82=E6=95=B0hHandle=E6=98=AF=E4=B8=80=E4=B8=
=AA=E4=BA=8B=E4=BB=B6=E7=9A=84=E5=8F=A5=E6=9F=84=EF=BC=8C=E7=AC=AC=E4=BA=8C=
=E4=B8=AA=E5=8F=82=E6=95=B0dwMilliseconds=E6=98=AF=E6=97=B6=E9=97=B4=E9=97=
=B4=E9=9A=94=E3=80=82=E5=A6=82=E6=9E=9C=E6=97=B6=E9=97=B4=E6=98=AF=E6=9C=89=
=E4=BF=A1=E5=8F=B7=E7=8A=B6=E6=80=81=E8=BF=94=E5=9B=9EWAIT_OBJECT_0=EF=BC=
=8C=E5=A6=82=E6=9E=9C=E6=97=B6=E9=97=B4=E8=B6=85=E8=BF=87dwMilliseconds=E5=
=80=BC=E4=BD=86=E6=97=B6=E9=97=B4=E4=BA=8B=E4=BB=B6=E8=BF=98=E6=98=AF=E6=97=
=A0=E4=BF=A1=E5=8F=B7=E7=8A=B6=E6=80=81=E5=88=99=E8=BF=94=E5=9B=9EWAIT_TI=
MEOUT=E3=80=82</P>
<P>hHandle=E5=8F=AF=E4=BB=A5=E6=98=AF=E4=B8=8B=E5=88=97=E5=AF=B9=E8=B1=A1=
=E7=9A=84=E5=8F=A5=E6=9F=84=EF=BC=9A</P>
<P> Change notification <BR>Console input <BR>Event =
<BR>Job=20
<BR>Memory resource notification <BR>Mutex <BR>Process <BR>Semaphore =
<BR>Thread=20
<BR>Waitable timer </P>
<P><BR>WaitForSingleObject=E5=87=BD=E6=95=B0=E7=94=A8=E6=9D=A5=E6=A3=80=E6=
=B5=8BhHandle=E4=BA=8B=E4=BB=B6=E7=9A=84=E4=BF=A1=E5=8F=B7=E7=8A=B6=E6=80=
=81=EF=BC=8C=E5=BD=93=E5=87=BD=E6=95=B0=E7=9A=84=E6=89=A7=E8=A1=8C=E6=97=B6=
=E9=97=B4=E8=B6=85=E8=BF=87dwMilliseconds=E5=B0=B1=E8=BF=94=E5=9B=9E=EF=BC=
=8C=E4=BD=86=E5=A6=82=E6=9E=9C=E5=8F=82=E6=95=B0dwMilliseconds=E4=B8=BAIN=
FINITE=E6=97=B6=E5=87=BD=E6=95=B0=E5=B0=86=E7=9B=B4=E5=88=B0=E7=9B=B8=E5=BA=
=94=E6=97=B6=E9=97=B4=E4=BA=8B=E4=BB=B6=E5=8F=98=E6=88=90=E6=9C=89=E4=BF=A1=
=E5=8F=B7=E7=8A=B6=E6=80=81=E6=89=8D=E8=BF=94=E5=9B=9E=EF=BC=8C=E5=90=A6=E5=
=88=99=E5=B0=B1=E4=B8=80=E7=9B=B4=E7=AD=89=E5=BE=85=E4=B8=8B=E5=8E=BB=EF=BC=
=8C=E7=9B=B4=E5=88=B0WaitForSingleObject=E6=9C=89=E8=BF=94=E5=9B=9E=E7=9B=
=B4=E6=89=8D=E6=89=A7=E8=A1=8C=E5=90=8E=E9=9D=A2=E7=9A=84=E4=BB=A3=E7=A0=81=
=E3=80=82=E5=9C=A8=E8=BF=99=E9=87=8C=E4=B8=BE=E4=B8=AA=E4=BE=8B=E5=AD=90=EF=
=BC=9A</P>
<P>=E5=85=88=E5=88=9B=E5=BB=BA=E4=B8=80=E4=B8=AA=E5=85=A8=E5=B1=80Event=E5=
=AF=B9=E8=B1=A1g_event:</P>
<P> CEvent g_event;</P>
<P>=E5=9C=A8=E7=A8=8B=E5=BA=8F=E4=B8=AD=E5=8F=AF=E4=BB=A5=E9=80=9A=E8=BF=87=
=E8=B0=83=E7=94=A8CEvent::SetEvent=E8=AE=BE=E7=BD=AE=E4=BA=8B=E4=BB=B6=E4=
=B8=BA=E6=9C=89=E4=BF=A1=E5=8F=B7=E7=8A=B6=E6=80=81=E3=80=82</P>
<P>=E4=B8=8B=E9=9D=A2=E6=98=AF=E4=B8=80=E4=B8=AA=E7=BA=BF=E7=A8=8B=E5=87=BD=
=E6=95=B0MyThreadPro()</P>
<P>UINT CFlushDlg::MyThreadProc( LPVOID pParam ) </P>
<P><BR>{ </P>
<P><BR> WaitForSingleObject(g_event,INFINITE); =
</P>
<P><BR> For(;;) </P>
<P><BR> { </P>
<P><BR> =
=E2=80=A6=E2=80=A6=E2=80=A6=E2=80=A6. </P>
<P><BR> } </P>
<P><BR> return 0; </P>
<P><BR>} </P>
<P><BR>=E5=9C=A8=E8=BF=99=E4=B8=AA=E7=BA=BF=E7=A8=8B=E5=87=BD=E6=95=B0=E4=
=B8=AD=E5=8F=AA=E6=9C=89=E8=AE=BE=E7=BD=AEg_event=E4=B8=BA=E6=9C=89=E4=BF=
=A1=E5=8F=B7=E7=8A=B6=E6=80=81=E6=97=B6=E6=89=8D=E6=89=A7=E8=A1=8C=E4=B8=8B=
=E9=9D=A2=E7=9A=84for=E5=BE=AA=E7=8E=AF=EF=BC=8C=E5=9B=A0=E4=B8=BAg_event=
=E6=98=AF=E5=85=A8=E5=B1=80=E5=8F=98=E9=87=8F=EF=BC=8C=E6=89=80=E4=BB=A5=E6=
=88=91=E4=BB=AC=E5=8F=AF=E4=BB=A5=E5=9C=A8=E5=88=AB=E7=9A=84=E7=BA=BF=E7=A8=
=8B=E4=B8=AD=E9=80=9A=E8=BF=87g_event.=20
SetEvent=E6=8E=A7=E5=88=B6=E8=BF=99=E4=B8=AA=E7=BA=BF=E7=A8=8B=E3=80=82</=
P>
<P><BR> </P>
<P><BR>=E8=BF=98=E6=9C=89=E4=B8=80=E7=A7=8D=E7=94=A8=E6=B3=95=E5=B0=B1=E6=
=98=AF=E6=88=91=E4=BB=AC=E5=8F=AF=E4=BB=A5=E9=80=9A=E8=BF=87WaitForSingle=
Object=E5=87=BD=E6=95=B0=E6=9D=A5=E9=97=B4=E9=9A=94=E7=9A=84=E6=89=A7=E8=A1=
=8C=E4=B8=80=E4=B8=AA=E7=BA=BF=E7=A8=8B=E5=87=BD=E6=95=B0=E7=9A=84=E5=87=BD=
=E6=95=B0=E4=BD=93</P>
<P> UINT CFlushDlg::MyThreadProc( LPVOID pParam =
) </P>
<P><BR>{ </P>
<P><BR> =20
while(WaitForSingleObject(g_event,MT_INTERVAL)!=3DWAIT_OBJECT_0) </P>
<P><BR> { </P>
<P><BR> =
=E2=80=A6=E2=80=A6=E2=80=A6=E2=80=A6=E2=80=A6=E2=80=A6 </P>
<P><BR> } </P>
<P><BR> return 0; </P>
<P><BR>} </P>
<P><BR>=E5=9C=A8=E8=BF=99=E4=B8=AA=E7=BA=BF=E7=A8=8B=E5=87=BD=E6=95=B0=E4=
=B8=AD=E5=8F=AF=E4=BB=A5=E5=8F=AF=E4=BB=A5=E9=80=9A=E8=BF=87=E8=AE=BE=E7=BD=
=AEMT_INTERVAL=E6=9D=A5=E6=8E=A7=E5=88=B6=E8=BF=99=E4=B8=AA=E7=BA=BF=E7=A8=
=8B=E7=9A=84=E5=87=BD=E6=95=B0=E4=BD=93=E5=A4=9A=E4=B9=85=E6=89=A7=E8=A1=8C=
=E4=B8=80=E6=AC=A1=EF=BC=8C=E5=BD=93=E4=BA=8B=E4=BB=B6=E4=B8=BA=E6=97=A0=E4=
=BF=A1=E5=8F=B7=E7=8A=B6=E6=80=81=E6=98=AF=E5=87=BD=E6=95=B0=E4=BD=93=E9=9A=
=94MT_INTERVAL=E6=89=A7=E8=A1=8C=E4=B8=80=E6=AC=A1=EF=BC=8C=E5=BD=93=E8=AE=
=BE=E7=BD=AE=E4=BA=8B=E4=BB=B6=E4=B8=BA=E6=9C=89=E4=BF=A1=E5=8F=B7=E7=8A=B6=
=E6=80=81=E6=97=B6=EF=BC=8C=E7=BA=BF=E7=A8=8B=E5=B0=B1=E6=89=A7=E8=A1=8C=E5=
=AE=8C=E6=AF=95=E4=BA=86=E3=80=82</P>
<P> </P>
<P> </P>
<P>WaitForMultipleObjects<BR> </P>
<P>The WaitForMultipleObjects function returns when one of the following =
occurs:=20
</P>
<P> </P>
<P><BR>Either any one or all of the specified objects are in the =
signaled state.=20
</P>
<P>The time-out interval elapses. </P>
<P> </P>
<P>To enter an alertable wait state, use the WaitForMultipleObjectsEx =
function.=20
</P>
<P>DWORD WaitForMultipleObjects(<BR> DWORD=20
nCount, =
=20
// number of handles in array<BR> CONST HANDLE *lpHandles, =
//=20
object-handle array<BR> BOOL=20
bWaitAll, &nbs=
p; //=20
wait option<BR> DWORD dwMilliseconds =
//=20
time-out interval<BR>);</P>
<P> </P>
<P><BR> </P>
<P>Parameters</P>
<P> </P>
<P> </P>
<P>nCount </P>
<P>[in] Specifies the number of object handles in the array pointed to =
by=20
lpHandles. The maximum number of object handles is MAXIMUM_WAIT_OBJECTS. =
</P>
<P>lpHandles </P>
<P>[in] Pointer to an array of object handles. For a list of the object =
types=20
whose handles can be specified, see the following Remarks section. The =
array can=20
contain handles to objects of different types. It may not contain the =
multiple=20
copies of the same handle. </P>
<P>If one of these handles is closed while the wait is still pending, =
the=20
function's behavior is undefined. </P>
<P><BR>Windows NT/2000/XP: The handles must have SYNCHRONIZE access. For =
more=20
information, see Standard Access Rights. </P>
<P><BR>Windows 95/98/Me: No handle may be a duplicate of another handle =
created=20
using DuplicateHandle. </P>
<P> </P>
<P>bWaitAll </P>
<P>[in] Specifies the wait type. If TRUE, the function returns when the =
state of=20
all objects in the lpHandles array is signaled. If FALSE, the function =
returns=20
when the state of any one of the objects is set to signaled. In the =
latter case,=20
the return value indicates the object whose state caused the function to =
return.=20
</P>
<P>dwMilliseconds </P>
<P>[in] Specifies the time-out interval, in milliseconds. The function =
returns=20
if the interval elapses, even if the conditions specified by the =
bWaitAll=20
parameter are not met. If dwMilliseconds is zero, the function tests the =
states=20
of the specified objects and returns immediately. If dwMilliseconds is =
INFINITE,=20
the function's time-out interval never elapses. </P>
<P> </P>
<P>Return Values</P>
<P> </P>
<P>If the function succeeds, the return value indicates the event that =
caused=20
the function to return. This value can be one of the following.=20
<BR> <BR> </P><BR><BR>
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