U++ framework: U++ Core » BlockStream::_Get does not buffer data (current svn version)

Home » U++ Library support » U++ Core » BlockStream::_Get does not buffer data (current svn version)

Show: Today's Messages :: Polls :: Message Navigator
E-mail to friend

BlockStream::_Get does not buffer data (current svn version) [message #15442]

Wed, 23 April 2008 22:23

hans
Messages: 44
Registered: March 2006
Location: Germany

Member

In the function

dword BlockStream::_Get(void *data, dword size)

the call to SyncPage resets the read buffer, so the normal Get() functions of Stream are not benefit from buffering.

	if(pg0 == pg1) {
		SyncPage(); // <--- here
		memcpy(data, buffer + pos0 - pos, size);
		ptr = buffer + pos1 - pos;
	}

I have commented out SyncPage() and this seems to fix it but I do not completely understand the code, so this may have introduce new bugs Rolling Eyes

App to reproduce (run it and see how often BlockStream::_Get() is called)

file: console.cpp

CONSOLE_APP_MAIN
{
	Cout() << "Hello wonderful U++ world\n";
	FileIn f;
	f.Open("console.cpp");
	for (;;) {
		byte b;
		if (f.Get(&b, 1) != 1) break;
		Cout() << b;
	}

}
//add many comment lines to get big filesize
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////

Report message to a moderator

[Message index]

		BlockStream::_Get does not buffer data (current svn version) By: hans on Wed, 23 April 2008 22:23
		Re: BlockStream::_Get does not buffer data (current svn version) By: mirek on Wed, 23 April 2008 22:39
		Re: BlockStream::_Get does not buffer data (current svn version) By: hans on Thu, 24 April 2008 21:27
		Re: BlockStream::_Get does not buffer data (current svn version) By: mirek on Thu, 24 April 2008 22:58

Previous Topic:	GetHWND() always returns NULL?
Next Topic:	Convenient work with options/properties

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Mon Sep 07 17:33:45 GMT+2 2026

Total time taken to generate the page: 0.00640 seconds