Struct uct_iov

#[repr(C)]
pub struct uct_iov {
    pub buffer: *mut c_void,
    pub length: size_t,
    pub memh: uct_mem_h,
    pub stride: size_t,
    pub count: c_uint,
}

@ingroup UCT_RESOURCE @brief Structure for scatter-gather I/O.

Specifies a list of buffers which can be used within a single data transfer function call.

@verbatim buffer | +———–+—––+———–+—––+———–+ | payload | empty | payload | empty | payload | +———–+—––+———–+—––+———–+ |<-length–>| |<-length–>| |<-length–>| |<–– stride —–>|<–– stride —–>| @endverbatim

@note The sum of lengths in all iov list must be less or equal to max_zcopy of the respective communication operation. @note If @a length or @a count are zero, the memory pointed to by @a buffer will not be accessed. Otherwise, @a buffer must point to valid memory.

@note If @a count is one, every iov entry specifies a single contiguous data block

@note If @a count > 1, each iov entry specifies a strided block of @a count elements and distance of @a stride byte between consecutive elements

Fields

buffer: *mut c_void

< Data buffer

length: size_t

< Length of the payload in bytes

memh: uct_mem_h

< Local memory key descriptor for the data

stride: size_t

< Stride between beginnings of payload elements in the buffer in bytes

count: c_uint

< Number of payload elements in the buffer

Trait Implementations

impl Clone for uct_iov

fn clone(&self) -> uct_iov

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for uct_iov

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

Formats the value using the given formatter.

impl Copy for uct_iov