dxd::stream::umap< stream_t > Class Template Reference

stream user mapping More...

#include <dxd_stream.h>

Inheritance diagram for dxd::stream::umap< stream_t >:

Collaboration diagram for dxd::stream::umap< stream_t >:

Public Member Functions
void	free ()
	kernel map free More...
os_result	initialize (::IOMemoryDescriptor *iokit_memory_descriptor, size_t offset=0)
	IOKit kernel map initializer. More...
	operator const ::IOMemoryMap * () const
	operator const dx::circular * () const
	operator dx::circular * () const
const dx::circular *	operator-> () const
	operator to use mapping like pointer More...
dx::circular *	operator-> ()
	operator::IOMemoryMap * ()
template<typename reference_t >
int	release (reference_t &reference)
void	retain ()
size_t	size () const
	kernel mapping size More...
os_result	start ()
os_result	stop (bool force=false)
	umap (client &client, const dx::os_event &os_event, stream_t *&stream)
	~umap ()

Public Attributes
atomic< int >	references =0
os_result	status
	status of mapping object More...

Protected Attributes
dx::circular *	_vm
	kernel virtual address mapping More...
::IOMemoryMap *	iokit_memory_map
atomic< event< dx::user > * >	next
stream_t *&	stream
	auto nulling reference More...

Detailed Description

template<typename stream_t = stream>
class dxd::stream::umap< stream_t >

stream user mapping

Constructor & Destructor Documentation

template<typename stream_t = stream>

dxd::stream::umap< stream_t >::umap ( client &  client, const dx::os_event &  os_event, stream_t *&  stream  )

inline

insert broadcast user event

Here is the call graph for this function:

template<typename stream_t = stream>

dxd::stream::umap< stream_t >::~umap ( )

inline

remove broadcast user event

releases this stream reference and nulls stream pointer if it was the last reference

Here is the call graph for this function:

Member Function Documentation

void dxd::map< scope_t, dx::circular >::free ( )

inlineinherited

kernel map free

Checks if kernel mapping already exists and

does not call unmap(): IOMemoryMap instances will unmap themselves upon free, ie. when the last client with a reference calls release. unmap() forces the IOMemoryMap to destroy the mapping it represents, regardless of the number of clients. releases the map object.

Here is the caller graph for this function:

os_result dxd::map< scope_t, dx::circular >::initialize ( ::IOMemoryDescriptor *  iokit_memory_descriptor, size_t  offset = 0  )

inlineinherited

IOKit kernel map initializer.

map<kernel> maps an IOMemoryDescriptor (typically cast of a dxd::memory or buffer class) into the kernel address space.

https://developer.apple.com/library/content/qa/qa1197/_index.html

Allows re-initialization.

Checks buffer object,

maps the buffer into the kernel (will fail if offset is given)

and obtains a kernel virtual address (apply offset here instead).

Parameters

iokit_memory_descriptor	IOMemoryDescriptor to be mapped into the kernel address space
offset	offset into memory descriptor to create mapping

dxd::map< scope_t, dx::circular >::operator const ::IOMemoryMap * ( ) const

inlineinherited

dxd::map< scope_t, dx::circular >::operator const dx::circular * ( ) const

inlineinherited

dxd::map< scope_t, dx::circular >::operator dx::circular * ( ) const

inlineinherited

const dx::circular * dxd::map< scope_t, dx::circular >::operator-> ( ) const

inlineinherited

operator to use mapping like pointer

dx::circular * dxd::map< scope_t, dx::circular >::operator-> ( )

inlineinherited

dxd::map< scope_t, dx::circular >::operator::IOMemoryMap * ( )

inlineinherited

template<typename reference_t >

int dxd::referenced::release ( reference_t &  reference )

inlineinherited

void dxd::referenced::retain ( )

inlineinherited

Here is the caller graph for this function:

size_t dxd::map< scope_t, dx::circular >::size ( ) const

inlineinherited

kernel mapping size

template<typename stream_t = stream>

os_result dxd::stream::umap< stream_t >::start ( )

inline

template<typename stream_t = stream>

os_result dxd::stream::umap< stream_t >::stop ( bool  force = false )

inline

Here is the caller graph for this function:

Member Data Documentation

dx::circular * dxd::map< scope_t, dx::circular >::_vm

protectedinherited

kernel virtual address mapping

::IOMemoryMap* dxd::map< scope_t, dx::circular >::iokit_memory_map

protectedinherited

atomic<event< dx::user > *> dxd::linked::item< event< dx::user > >::next

protectedinherited

atomic<int> dxd::referenced::references =0

inherited

os_result dxd::map< scope_t, dx::circular >::status

inherited

status of mapping object

template<typename stream_t = stream>

stream_t*& dxd::stream::umap< stream_t >::stream

protected

auto nulling reference

---

The documentation for this class was generated from the following file:

• dxd_stream.h