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Open the file with FILE_FLAG_OVERLAPPED and use WriteFileEx to write to it. This will give you async write to file (i.e. WriteFileEx will return immediately).<br />
<br />
Radu
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Open the file with FILE_FLAG_OVERLAPPED and use WriteFileEx to write to it. This will give you async write to file (i.e. WriteFileEx will return immediately).

Radu

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Okay I think there are problems with FILE_FLAG_OVERLAPPED though...<br />
<br />
&quot;Asynchronous Disk I/O Appears as Synchronous on Windows NT, Windows 2000, and Windows XP&quot;<br />
<a href="http://support.microsoft.com/default.aspx?scid=kb;en-us;156932" rel="ugc">http://support.microsoft.com/default.aspx?scid=kb;en-us;156932</a>
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Okay I think there are problems with FILE_FLAG_OVERLAPPED though...

"Asynchronous Disk I/O Appears as Synchronous on Windows NT, Windows 2000, and Windows XP"
http://support.microsoft.com/default.aspx?scid=kb;en-us;156932 [http://support.microsoft.com/default.aspx?scid=kb;en-us;156932]

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Hi, I have a CRITICAL_PRIORITY thread that must absolutely perform work every 20ms.<br />
From this thread, I try to write a 400 byte message to disk. &nbsp;However if the disk subsystem is bogged down or other, this can take longer than the acceptable amount of time.<br />
<br />
Is there a safe way to write to sume buffered thread that will then write to disk?<br />
But I can't have the Critical thread be interrupted for anything... so how can I pass the data to the other thread properly?<br />
<br />
Do I have to use somewhat experimental &quot;lockless&quot; data structures?
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Hi, I have a CRITICAL_PRIORITY thread that must absolutely perform work every 20ms.
From this thread, I try to write a 400 byte message to disk.  However if the disk subsystem is bogged down or other, this can take longer than the acceptable amount of time.

Is there a safe way to write to sume buffered thread that will then write to disk?
But I can't have the Critical thread be interrupted for anything... so how can I pass the data to the other thread properly?

Do I have to use somewhat experimental "lockless" data structures?

WriteFile without blocking Critical priority thread

Microsoft Visual C++ (often abbreviated as MSVC or VC++) is an integrated development environment (IDE) product from Microsoft for the C, C++, and C++/CLI programming languages. It features tools for developing and debugging C++ code, especially code written for the Microsoft Windows API, the DirectX API, and the Microsoft .NET Framework. Many applications require redistributable Visual C++ packages to function correctly and are often installed independently of applications, allowing multiple applications to make use of the package while only having to install it once