Hello,
I try to allocate approx. 50MB of memory for a DIB:
hDIB= GlobalAlloc(GHND,dw /*approx 50MB*/);
It fails. But Windows task manager told me that more than 500MB available.
The OS is win xp.
Why??? What is the problem?
Please help.
br
Ralf
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Hello,
I try to allocate approx. 50MB of memory for a DIB:
hDIB= GlobalAlloc(GHND,dw /*approx 50MB*/);
It fails. But Windows task manager told me that more than 500MB available.
The OS is win xp.
Why??? What is the problem?
Please help.
br
Ralf
This needs to allocate a contiguous block of 50MB. This may not be available, though many smaller blocks may be available that together make up more than 500MB.Quote:
Originally Posted by Ralf Schneider
Maybe you could try preallocating the large block of memory early in your program. Or you could try enabling the low-fragmentation heap if you are running on XP.
Hello,
that sounds complicated.
My problem occurs in a DLL.
Do I have to enable the low-fragmentation heap at the beginning of the calling app?
br
ralf
It's not that complicated, but you should do it early in your application (.exe).Quote:
Originally Posted by Ralf Schneider
See the (second) example for HeapSetInformation.
Just an aside note:
Generally, for the question "Why Xyz (Windows API) function fails?", GetLastError can give a more valuable answer than Task Manager. ;)
Have a look at: How to get the reason for a failure of a SDK function?
