现在主要是希望启动线程,然后利用像WaitForMultipleObjects这样的函数将线程挂起,当set一个符合的Event事件时触发线程响应。自己做了一个程序,但是在运行时出错,WaitForMultipleObjects返回值总是0xffffffff无效值,不知道为什么,希望有大虾帮助看看,下面是大概示例:using System.Threading;
class WatchThread
{
[DllImport("kernel32.dll")]
private static extern int CreateEvent(IntPtr lpEventAttributes,
bool bManualReset,
bool bInitialState,
string lpName); [DllImport("kernel32.dll")]
private static extern bool SetEvent(int iEvent); [DllImport("kernel32.dll")]
private static extern uint WaitForMultipleObjects(uint nCount,
ref int[] lpHandles,
bool bWaitAll,
int dwMilliseconds); const uint iMaxEventNum = 4; static int[] m_iEvent = new int[4];
IntPtr pt = new IntPtr();
m_iEvent[0] = CreateEvent(pt, false, false, null);
m_iEvent[1] = CreateEvent(pt, false, false, null);
m_iEvent[2] = CreateEvent(pt, false, false, null);
m_iEvent[3] = CreateEvent(pt, false, false, null); Thread t1 = new Thread(WaitAndProcEvent);
t1.IsBackground = true;
t1.Start(); SetEvent(m_iEvent[0]); bool bOK = false; while (!bOK)
{
uint uiRet = 0;
//就是这里,总是得不到正确的值
uiRet = WaitForMultipleObjects(iMaxEventNum, ref m_iEvent, false, Timeout.Infinite);
}
}
class WatchThread
{
[DllImport("kernel32.dll")]
private static extern int CreateEvent(IntPtr lpEventAttributes,
bool bManualReset,
bool bInitialState,
string lpName); [DllImport("kernel32.dll")]
private static extern bool SetEvent(int iEvent); [DllImport("kernel32.dll")]
private static extern uint WaitForMultipleObjects(uint nCount,
ref int[] lpHandles,
bool bWaitAll,
int dwMilliseconds); const uint iMaxEventNum = 4; static int[] m_iEvent = new int[4];
IntPtr pt = new IntPtr();
m_iEvent[0] = CreateEvent(pt, false, false, null);
m_iEvent[1] = CreateEvent(pt, false, false, null);
m_iEvent[2] = CreateEvent(pt, false, false, null);
m_iEvent[3] = CreateEvent(pt, false, false, null); Thread t1 = new Thread(WaitAndProcEvent);
t1.IsBackground = true;
t1.Start(); SetEvent(m_iEvent[0]); bool bOK = false; while (!bOK)
{
uint uiRet = 0;
//就是这里,总是得不到正确的值
uiRet = WaitForMultipleObjects(iMaxEventNum, ref m_iEvent, false, Timeout.Infinite);
}
}
得到错误是:句柄无效
但是想不明白,是CreateEvent错误么?
用了GetLastError()得到错误码为句柄无效。
我调用的有什么问题么?