llvm::cas::OnDiskDataAllocator Class Reference

Sink for data. More...

#include "llvm/CAS/OnDiskDataAllocator.h"

Classes
struct	ImplType
class	OnDiskPtr
	A pointer to data stored on disk. More...

Public Types
using	ValueProxy = MutableArrayRef<char>

Public Member Functions
Expected< ArrayRef< char > >	get (FileOffset Offset, size_t Size) const
	Get the data of Size stored at the given Offset.
Expected< OnDiskPtr >	allocate (size_t Size)
	Allocate at least Size with 8-byte alignment.
MutableArrayRef< uint8_t >	getUserHeader () const
size_t	size () const
size_t	capacity () const
	OnDiskDataAllocator (OnDiskDataAllocator &&RHS)
OnDiskDataAllocator &	operator= (OnDiskDataAllocator &&RHS)
	OnDiskDataAllocator (const OnDiskDataAllocator &)=delete
OnDiskDataAllocator &	operator= (const OnDiskDataAllocator &)=delete
	~OnDiskDataAllocator ()

Static Public Member Functions
static Expected< OnDiskDataAllocator >	create (const Twine &Path, const Twine &TableName, uint64_t MaxFileSize, std::optional< uint64_t > NewFileInitialSize, uint32_t UserHeaderSize=0, function_ref< void(void *)> UserHeaderInit=nullptr)

Detailed Description

Sink for data.

Stores variable length data with 8-byte alignment. Does not track size of data, which is assumed to known from context, or embedded. Uses 0-padding but does not guarantee 0-termination.

Definition at line 29 of file OnDiskDataAllocator.h.

Member Typedef Documentation

ValueProxy

using llvm::cas::OnDiskDataAllocator::ValueProxy = MutableArrayRef<char>

Definition at line 31 of file OnDiskDataAllocator.h.

Constructor & Destructor Documentation

OnDiskDataAllocator() [1/2]

OnDiskDataAllocator::OnDiskDataAllocator ( OnDiskDataAllocator && RHS )

default

References OnDiskDataAllocator(), and RHS.

Referenced by OnDiskDataAllocator(), OnDiskDataAllocator(), operator=(), and operator=().

OnDiskDataAllocator() [2/2]

llvm::cas::OnDiskDataAllocator::OnDiskDataAllocator ( const OnDiskDataAllocator & )

delete

References OnDiskDataAllocator().

~OnDiskDataAllocator()

OnDiskDataAllocator::~OnDiskDataAllocator ( )

default

Member Function Documentation

allocate()

Expected< OnDiskDataAllocator::OnDiskPtr > OnDiskDataAllocator::allocate

(

size_t

Size

)

Allocate at least Size with 8-byte alignment.

Definition at line 213 of file OnDiskDataAllocator.cpp.

References llvm::createStringError(), llvm::make_error_code(), and Size.

capacity()

size_t OnDiskDataAllocator::capacity

(

)

const

Definition at line 229 of file OnDiskDataAllocator.cpp.

create()

Expected< OnDiskDataAllocator > OnDiskDataAllocator::create ( const Twine & Path, const Twine & TableName, uint64_t MaxFileSize, std::optional< uint64_t > NewFileInitialSize, uint32_t UserHeaderSize = 0, function_ref< void(void *)> UserHeaderInit = nullptr )

static

Definition at line 204 of file OnDiskDataAllocator.cpp.

References llvm::createStringError(), and llvm::make_error_code().

Referenced by llvm::cas::ondisk::OnDiskGraphDB::open().

get()

Expected< ArrayRef< char > > OnDiskDataAllocator::get	(	FileOffset	Offset,
		size_t	Size ) const

Get the data of Size stored at the given Offset.

Note the allocator doesn't keep track of the allocation size, thus Size doesn't need to match the size of allocation but needs to be smaller.

Definition at line 218 of file OnDiskDataAllocator.cpp.

References llvm::createStringError(), llvm::make_error_code(), llvm::Offset, and Size.

getUserHeader()

MutableArrayRef< uint8_t > OnDiskDataAllocator::getUserHeader

(

)

const

Returns

the buffer that was allocated at create time, with size UserHeaderSize.

Definition at line 224 of file OnDiskDataAllocator.cpp.

operator=() [1/2]

OnDiskDataAllocator & llvm::cas::OnDiskDataAllocator::operator= ( const OnDiskDataAllocator & )

delete

References OnDiskDataAllocator().

operator=() [2/2]

OnDiskDataAllocator & OnDiskDataAllocator::operator= ( OnDiskDataAllocator && RHS )

default

References OnDiskDataAllocator(), and RHS.

size()

size_t OnDiskDataAllocator::size

(

)

const

Definition at line 228 of file OnDiskDataAllocator.cpp.

---

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

• include/llvm/CAS/OnDiskDataAllocator.h
• lib/CAS/OnDiskDataAllocator.cpp