class VmarManager

Defined at line 29 of file ../../zircon/system/ulib/fzl/include/lib/fzl/vmar-manager.h

VmarManager

A small utility class which manages the lifecycle of a VMAR intended to be

shared among a collection of users. VmarManager will handle simple tasks such as

automatically destroying the VMAR at end-of-life in addition to releasing the

handle.

Currently, the primary use case for a VmarManager is to be used to create a

COMPACT sub-vmar in order to hold a number of VMO mappings while minimizing

page table fragmentation..

See fzl::VmoMapper.

Public Methods

fbl::RefPtr<VmarManager> Create (size_t size, fbl::RefPtr<VmarManager> parent, zx_vm_option_t options)

Create a new VmarManager (creating the underlying VMAR object in the

process)

size : the size of the VMAR region to create.

parent : the parent of this VMAR, or nullptr to use the root VMAR.

options : creation options to pass to vmar_allocate

Defined at line 13 of file ../../zircon/system/ulib/fzl/vmar-manager.cc

zx::result<fbl::RefPtr<VmarManager>> Use (const zx::unowned_vmar & vmar)

Create a new VmarManager that wraps an existing vmar, without making a child vmar inside

of it. This is meant to facilitate the use of a non-root vmars, that like a root vmar, are

guaranteed to never be destroyed while the process is running. An example of this is the

vmar provided to drivers by the driver framework.

WARNING: This vmar must NOT be destroyed while this VmarManager, or any children of it,

are alive inside the process.

vmar : the VMAR to use

Defined at line 43 of file ../../zircon/system/ulib/fzl/vmar-manager.cc

const zx::vmar & vmar ()

Defined at line 53 of file ../../zircon/system/ulib/fzl/include/lib/fzl/vmar-manager.h

void * start ()

Defined at line 54 of file ../../zircon/system/ulib/fzl/include/lib/fzl/vmar-manager.h

uint64_t size ()

Defined at line 55 of file ../../zircon/system/ulib/fzl/include/lib/fzl/vmar-manager.h

const fbl::RefPtr<VmarManager> & parent ()

Defined at line 56 of file ../../zircon/system/ulib/fzl/include/lib/fzl/vmar-manager.h

class RefPtr