#include <IOKit/IOSubMemoryDescriptor.h>

IOKit/IOSubMemoryDescriptor.h Kernel.framework

@class IOSubMemoryDescriptor : public IOMemoryDescriptor @abstract The IOSubMemoryDescriptor object describes a memory area made up of a portion of another IOMemoryDescriptor. @discussion The IOSubMemoryDescriptor object represents a subrange of memory, specified as a portion of another IOMemoryDescriptor.

includes: IOKit/IOMemoryDescriptor.h, libkern/c++/OSPtr.h

1 class

classIOSubMemoryDescriptor

: public IOMemoryDescriptor

IOMemoryDescriptor *	_parent
IOByteCount	_start

APPLE_KEXT_OVERRIDE
virtual void free()

virtual protected

static OSPtr<IOSubMemoryDescriptor> withSubRange(
	IOMemoryDescriptor *of,
	IOByteCount offset,
	IOByteCount length,
	IOOptionBits options
)

static

virtual bool initSubRange(
	IOMemoryDescriptor * parent,
	IOByteCount offset,
	IOByteCount length,
	IODirection withDirection
)

virtual

Initialize or reinitialize an IOSubMemoryDescriptor to describe a subrange of an existing descriptor. An IOSubMemoryDescriptor can be re-used by calling initSubRange again on an existing instance -- note that this behavior is not commonly supported in other IOKit classes, although it is here.

APPLE_KEXT_OVERRIDE
virtual addr64_t getPhysicalSegment(
	IOByteCount offset,
	IOByteCount * length,
	IOOptionBits options = 0
)

virtual

APPLE_KEXT_OVERRIDE
virtual IOReturn prepare(IODirection forDirection = kIODirectionNone)

virtual

APPLE_KEXT_OVERRIDE
virtual IOReturn complete(IODirection forDirection = kIODirectionNone)

virtual

APPLE_KEXT_OVERRIDE
virtual IOReturn redirect(task_t safeTask, bool redirect)

virtual

APPLE_KEXT_OVERRIDE
virtual IOReturn setPurgeable(IOOptionBits newState, IOOptionBits * oldState)

virtual

IOReturn setOwnership(task_t newOwner, int newLedgerTag, IOOptionBits newLedgerOptions)

APPLE_KEXT_OVERRIDE
virtual IOMemoryMap * makeMapping(
	IOMemoryDescriptor * owner,
	task_t intoTask,
	IOVirtualAddress atAddress,
	IOOptionBits options,
	IOByteCount offset,
	IOByteCount length
)

virtual

support map() on kIOMemoryTypeVirtual without prepare()

APPLE_KEXT_OVERRIDE
virtual uint64_t getPreparationID(void)

virtual

IOReturn getPageCounts(IOByteCount * residentPageCount, IOByteCount * dirtyPageCount)

IOReturn getPageCounts(
	IOByteCount * residentPageCount,
	IOByteCount * dirtyPageCount,
	IOByteCount * swappedPageCount
)