Struct devices::virtio::virtio_pci_device::SimpleAllocator

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struct SimpleAllocator {
    current_address: u64,
}
Expand description

A simple allocator that can allocate non-overlapping aligned intervals.

The addresses allocated are not exclusively reserved for the device, and cannot be used for a static device. The allocated placeholder address describes the layout of PCI BAR for hotplugged devices. Actual memory allocation is handled by PCI BAR reprogramming initiated by guest OS.

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§current_address: u64

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impl SimpleAllocator

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fn new(base_address: u64) -> Self

Constructs SimpleAllocator. Address will start at or after base_address.

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fn alloc(&mut self, size: u64, align: u64) -> Result<u64, PciDeviceError>

Allocate memory with size and align. Returns the start of address.

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