Struct fidl_fuchsia_sysmem::BufferCollectionInfo

pub struct BufferCollectionInfo {
    pub buffer_count: u32,
    pub format: BufferFormat,
    pub vmos: [Option<Vmo>; 64],
    pub vmo_size: u64,
}

Information about a buffer collection and its buffers.

Fields

buffer_count: u32

The number of buffers in the collection.

format: BufferFormat

Describes how the contents of buffers are represented. All buffers within the collection have the same format.

vmos: [Option<Vmo>; 64]

VMO handles for each buffer in the collection. The VMOs are only present when the buffers are backed by VMOs.

If present, all the VMOs after buffer_count are invalid handles. All buffer VMO handles have identical size and access rights. The VMO access rights are determined based on the usages which the client specified when allocating the buffer collection. For example, a client which expressed a read-only usage will receive VMOs without write rights.

vmo_size: u64

The size of each VMO provided. This property is only present when the buffers are backed by VMOs.

Trait Implementations

impl Debug for BufferCollectionInfo

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Decode<BufferCollectionInfo> for BufferCollectionInfo

fn new_empty() -> Self

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.

unsafe fn decode( &mut self, decoder: &mut Decoder<'_>, offset: usize, _depth: Depth ) -> Result<()>

Decodes an object of type T from the decoder’s buffers into self.

impl Encode<BufferCollectionInfo> for &mut BufferCollectionInfo

unsafe fn encode( self, encoder: &mut Encoder<'_>, offset: usize, _depth: Depth ) -> Result<()>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID.

impl<T0: Encode<u32>, T1: Encode<BufferFormat>, T2: Encode<Array<Optional<HandleType<Vmo, { _ }, 2147483648>>, 64>>, T3: Encode<u64>> Encode<BufferCollectionInfo> for (T0, T1, T2, T3)

unsafe fn encode( self, encoder: &mut Encoder<'_>, offset: usize, depth: Depth ) -> Result<()>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID.

impl Hash for BufferCollectionInfo

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for BufferCollectionInfo

fn cmp(&self, other: &BufferCollectionInfo) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for BufferCollectionInfo

fn eq(&self, other: &BufferCollectionInfo) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for BufferCollectionInfo

fn partial_cmp(&self, other: &BufferCollectionInfo) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl ResourceTypeMarker for BufferCollectionInfo

type Borrowed<'a> = &'a mut BufferCollectionInfo

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &mut Self::Owned. There are three cases:

fn take_or_borrow<'a>( value: &'a mut <Self as TypeMarker>::Owned ) -> Self::Borrowed<'a>

Cheaply converts from &mut Self::Owned to Self::Borrowed. For HandleBased types this is “take” (it returns an owned handle and replaces value with Handle::invalid), and for all other types it is “borrow” (just converts from one reference to another).

impl TypeMarker for BufferCollectionInfo

type Owned = BufferCollectionInfo

The owned Rust type which this FIDL type decodes into.

fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.

fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.

fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy.

fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.

impl Eq for BufferCollectionInfo

impl Standalone for BufferCollectionInfo

impl StructuralPartialEq for BufferCollectionInfo