Re: winapi WriteFile single byte and buffering

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#786

From: Ed Mulroy [TeamB]
Date: Thu, 10 Jan 2008 15:55

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WriteFile is an operating system function and buffering for it is up to the 
OS.  Your only controls over buffering are from specifying one of 
FILE_FLAG_WRITE_THROUGH and FILE_FLAG_NO_BUFFERING in the call to 
CreateFile.  Both of them limit or remove the effects of buffering.  However 
without them, the OS still determines what buffering it will provide so is 
free to decide what size buffer to use including using no buffer.

Typically the writes to a hard drive are buffered for performance.

For more detail read the help file documentation on CreateFile.

.  Ed

> John Grabner wrote in message
> news:47859f0a$1@newsgroups.borland.com...
>
>I am using WrtieFile to write a lot of single bytes to a file. Reading the 
>documentation I cannot work out if I can have a buffered write and if so 
>how do to do a buffered write.
>
> Any one know the answer?

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