Function region::alloc_at

pub fn alloc_at<T>(
    address: *const T,
    size: usize,
    protection: Protection
) -> Result<Allocation>

Allocates one or more pages of memory, at a specific address, with a defined protection.

The returned memory allocation is not guaranteed to reside at the provided address. E.g. on Windows, new allocations that do not reside within already reserved memory, are aligned to the operating system’s allocation granularity (most commonly 64KB).

Implementation

This function is implemented using VirtualAlloc on Windows, and mmap with MAP_FIXED on POSIX.

Parameters

• The address is rounded down to the closest page boundary.
• The size may not be zero.
• The size is rounded up to the closest page boundary, relative to the address.

Errors

• If an interaction with the underlying operating system fails, an error will be returned.
• If size is zero, Error::InvalidParameter will be returned.