Enum WriteMarkPolicy 

pub enum WriteMarkPolicy {
    Refuse,
    AllowSnapshot,
}

Policy for a read-only open of a file whose superblock marks it as open for write by a writer that is not a SWMR writer — superblock status-flag bit 0 (H5F_SUPER_WRITE_ACCESS) alone, the mark a page-buffered session (crate::FileAccessProperties::with_page_buffer_size) holds for its life.

Set it with FileAccessProperties::with_write_mark_policy, which states when the assertion AllowSnapshot makes is true. It governs the read-only opens only: a SWMR pair is followed with crate::File::open_swmr whatever this says, and no value of it lets a second writer join a file a writer holds.

Variants

Refuse

Refuse the open with Error::FileMarkedInUse. The default, and what H5Fopen does with the same byte.

AllowSnapshot

Read the file as it stands, on the caller’s assertion that the writer has flushed: it called crate::File::sync, or it stopped after a flush and the mark stands only because nothing cleared it. Every other refusal stays in place.

Trait Implementations

impl Clone for WriteMarkPolicy

fn clone(&self) -> WriteMarkPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WriteMarkPolicy

impl Debug for WriteMarkPolicy

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

Formats the value using the given formatter.

impl Default for WriteMarkPolicy

fn default() -> WriteMarkPolicy

Returns the “default value” for a type.

impl Eq for WriteMarkPolicy

impl PartialEq for WriteMarkPolicy

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for WriteMarkPolicy