alib::monomem::detail::Buffer Struct Reference

Description:

Internal type defining a memory buffer. The allocation space is found behind this object itself as it is placed at the start of each allocated buffer.

Definition at line 25 of file monoallocator.inl.

Collaboration diagram for alib::monomem::detail::Buffer:

Public Static Field Index:
static constexpr unsigned char	CLEAR = 0xF1
static constexpr unsigned char	MAGIC = 0xA1

Public Static Method Index:
static constexpr size_t	firstOffset (size_t firstObject, size_t alignment)

Public Field Index:
char *	act
	Pointer to the next free space in the buffer.
char *	end
	Pointer to the first byte behind the buffer.
Buffer *	previous
	the previously allocated buffer.

Public Method Index:
	Buffer ()=default
	Defaulted default constructor.
	Buffer (size_t size)
char *	allocate (size_t size, size_t alignment)
void	reset ()
size_t	Size ()

Field Details:

act

char* alib::monomem::detail::Buffer::act

Pointer to the next free space in the buffer.

Definition at line 36 of file monoallocator.inl.

CLEAR

unsigned char alib::monomem::detail::Buffer::CLEAR = 0xF1

staticconstexpr

A magic byte written when memory is freed.

See also

Field CLEAR.

Definition at line 34 of file monoallocator.inl.

end

char* alib::monomem::detail::Buffer::end

Pointer to the first byte behind the buffer.

Definition at line 37 of file monoallocator.inl.

MAGIC

unsigned char alib::monomem::detail::Buffer::MAGIC = 0xA1

staticconstexpr

A magic byte, used with the compiler-symbol ALIB_DEBUG_ALLOCATIONS to mark memory and detect out-of-bounds writes.

See also

Method Allocator::dbgCheckMemory.

Definition at line 30 of file monoallocator.inl.

previous

Buffer* alib::monomem::detail::Buffer::previous

the previously allocated buffer.

Definition at line 38 of file monoallocator.inl.

Constructor(s) / Destructor Details:

Buffer()

alib::monomem::detail::Buffer::Buffer ( size_t size )

inline

Initializes the members of this buffer to reflect the given size.

Parameters

size	The size of the given mem.

Definition at line 53 of file monoallocator.inl.

Method Details:

allocate()

char * alib::monomem::detail::Buffer::allocate ( size_t size, size_t alignment )

inline

Returns a pointer to an aligned piece of memory of the requested size inside this buffer. If there is not enough space left, nullptr is returned.

Parameters

size	The size to allocate.
alignment	The necessary alignment.

Returns

nullptr on failure, otherwise pointer to the requested memory.

Definition at line 87 of file monoallocator.inl.

Here is the call graph for this function:

firstOffset()

constexpr size_t alib::monomem::detail::Buffer::firstOffset ( size_t firstObject, size_t alignment )

inlinestaticconstexpr

Returns the first offset of an object with given alignment behind an object with. smaller alignment.

Parameters

firstObject	The allocation size of the first object allocated in a buffer.
alignment	The allocation alignment of the first object allocated in a buffer.

Returns

The value to add to the allocation size to ensure that an object with a certain alignment fits after placing firstObject at the start..

Definition at line 46 of file monoallocator.inl.

reset()

void alib::monomem::detail::Buffer::reset ( )

inline

"Frees" all allocated memory, by simply resetting the fill marker of the this buffer to the first usable byte of the allocated buffer.

Definition at line 71 of file monoallocator.inl.

Size()

size_t alib::monomem::detail::Buffer::Size ( )

inline

Returns

The size of this buffer.

Definition at line 65 of file monoallocator.inl.

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

• monoallocator.inl