Reserve memory on OS X

问题

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

回答1:

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.

回答2:

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

来源：https://stackoverflow.com/questions/3561034/reserve-memory-on-os-x