如何：监控管道中数据的进度？

Question

有一个 1MB 的管道：

if (0 == CreatePipe(&hRead,&hWrite,0,1024*1024))
{
printf("CreatePipe failed\n");
return success;
}   

一次发送 4000 个字节 (bytesReq = 4000)

while ((bytesReq = (FileSize - offset)) != 0)
{


//Send data to Decoder.cpp thread, converting to human readable CSV
        if ( (0 == WriteFile(hWrite,
                               readBuff,
                               bytesReq,
                               &bytesWritten,
                               0) ) || 
                               (bytesWritten != bytesReq) )
        {
             printf("WriteFile failed error = %d\n",GetLastError());
             break;
        } 

// Would like to update a status box with the amount of data in the pipe.
I would like to know if and how often it is getting full....



}  

4 个字节在管道另一端的另一个线程中读取。

Answer 1

在读取 4 个字节之前，您可以使用 PeekNamedPipe 读取可用字节