Reserve memory on OS X

Question

Hey,

What's the equivalent to Windows's VirtualAlloc in OS X? That is, how can i reserve a contiguous address space without actually commiting it and then commit chunks of it later?

Thanks,

Alex

Answer 1

No, unfortunately, there is no exact equivalent to VirtualAlloc.

Answer 2

What language are you coding in?

Answer 3

The mmap() function, called with MAP_ANON | MAP_PRIVATE, is very roughly equivalent to VirtualAlloc() with the MEM_RESERVE flag. Memory is then committed by touching each page in the mapping.