CODEWITHSUNDEEP
cwindowsmemory-managementheap-memoryvisual-c++-6
Jason
Jason

Reputation: 545

Can you tune C runtime heap segment reservation size on XP?

When the VC6 C runtime on XP can't serve an allocation request within an existing heap segment, it reserves a new segment. The size of these new segments increase by factors of 2 (until there are not large enough free areas to do that, at which point it falls down to smaller segments.)

In any case, is there any way to control this behavior on XP with the VC6 runtime? For example, doubling up to a point, but capping at 64MB segments.

If there is no way on XP but there is on 7, that would be good to know too. Or if there is no way on VC6 but there is on VC8 or up would be interesting.

Upvotes: 4

Views: 329

Answers (1)

Stewart
Stewart

Reputation: 4028

If you want specific allocation behaviour, write your own allocator. VirtualAlloc etc are there to help you do it. Using a compiler and CRT which is still in support would help too.

Upvotes: 2

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