Trait wasmer_wasi::WasiFile

pub trait WasiFile: Debug + Send + Write + Read + Seek + 'static + Upcastable + Serialize + Deserialize {
    fn last_accessed(&self) -> __wasi_timestamp_t;
    fn last_modified(&self) -> __wasi_timestamp_t;
    fn created_time(&self) -> __wasi_timestamp_t;
    fn size(&self) -> u64;
    fn set_len(
        &mut self, 
        _new_size: __wasi_filesize_t
    ) -> Result<(), WasiFsError>;
    fn unlink(&mut self) -> Result<(), WasiFsError>;
    fn bytes_available(&self) -> Result<usize, WasiFsError>;

    fn set_last_accessed(&self, _last_accessed: __wasi_timestamp_t) { ... }
    fn set_last_modified(&self, _last_modified: __wasi_timestamp_t) { ... }
    fn set_created_time(&self, _created_time: __wasi_timestamp_t) { ... }
    fn sync_to_disk(&self) -> Result<(), WasiFsError> { ... }
    fn rename_file(&self, _new_name: &Path) -> Result<(), WasiFsError> { ... }
    fn get_raw_fd(&self) -> Option<i32> { ... }
}

This trait relies on your file closing when it goes out of scope via Drop

Required methods

fn last_accessed(&self) -> __wasi_timestamp_t

the last time the file was accessed in nanoseconds as a UNIX timestamp

fn last_modified(&self) -> __wasi_timestamp_t

the last time the file was modified in nanoseconds as a UNIX timestamp

fn created_time(&self) -> __wasi_timestamp_t

the time at which the file was created in nanoseconds as a UNIX timestamp

fn size(&self) -> u64

the size of the file in bytes

fn set_len(&mut self, _new_size: __wasi_filesize_t) -> Result<(), WasiFsError>

Change the size of the file, if the new_size is greater than the current size the extra bytes will be allocated and zeroed

fn unlink(&mut self) -> Result<(), WasiFsError>

Request deletion of the file

fn bytes_available(&self) -> Result<usize, WasiFsError>

Returns the number of bytes available. This function must not block

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Provided methods

fn set_last_accessed(&self, _last_accessed: __wasi_timestamp_t)

set the last time the file was accessed in nanoseconds as a UNIX timestamp

fn set_last_modified(&self, _last_modified: __wasi_timestamp_t)

set the last time the file was modified in nanoseconds as a UNIX timestamp

fn set_created_time(&self, _created_time: __wasi_timestamp_t)

set the time at which the file was created in nanoseconds as a UNIX timestamp

fn sync_to_disk(&self) -> Result<(), WasiFsError>

Store file contents and metadata to disk Default implementation returns Ok(()). You should implement this method if you care about flushing your cache to permanent storage

fn rename_file(&self, _new_name: &Path) -> Result<(), WasiFsError>

Moves the file to a new location NOTE: the signature of this function will change before stabilization

fn get_raw_fd(&self) -> Option<i32>

Used for polling. Default returns None because this method cannot be implemented for most types Returns the underlying host fd

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Implementations

impl dyn WasiFile + 'static

pub fn downcast_ref<T: 'static>(&self) -> Option<&T>

pub fn downcast_mut<T: 'static>(&mut self) -> Option<&mut T>

Trait Implementations

impl<'typetag> Serialize for dyn WasiFile + 'typetag

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl<'typetag> Serialize for dyn WasiFile + Send + 'typetag

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl<'typetag> Serialize for dyn WasiFile + Sync + 'typetag

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl<'typetag> Serialize for dyn WasiFile + Send + Sync + 'typetag

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl Strictest for dyn WasiFile

type Object = dyn WasiFile + Send

Implementors

impl WasiFile for Pipe

fn last_accessed(&self) -> u64

fn last_modified(&self) -> u64

fn created_time(&self) -> u64

fn size(&self) -> u64

fn set_len(&mut self, len: u64) -> Result<(), WasiFsError>

fn unlink(&mut self) -> Result<(), WasiFsError>

fn bytes_available(&self) -> Result<usize, WasiFsError>

impl WasiFile for Stderr

fn last_accessed(&self) -> u64

fn last_modified(&self) -> u64

fn created_time(&self) -> u64

fn size(&self) -> u64

fn set_len(&mut self, _new_size: __wasi_filesize_t) -> Result<(), WasiFsError>

fn unlink(&mut self) -> Result<(), WasiFsError>

fn bytes_available(&self) -> Result<usize, WasiFsError>

fn get_raw_fd(&self) -> Option<i32>

impl WasiFile for Stdin

fn last_accessed(&self) -> u64

fn last_modified(&self) -> u64

fn created_time(&self) -> u64

fn size(&self) -> u64

fn set_len(&mut self, _new_size: __wasi_filesize_t) -> Result<(), WasiFsError>

fn unlink(&mut self) -> Result<(), WasiFsError>

fn bytes_available(&self) -> Result<usize, WasiFsError>

fn get_raw_fd(&self) -> Option<i32>

impl WasiFile for Stdout

fn last_accessed(&self) -> u64

fn last_modified(&self) -> u64

fn created_time(&self) -> u64

fn size(&self) -> u64

fn set_len(&mut self, _new_size: __wasi_filesize_t) -> Result<(), WasiFsError>

fn unlink(&mut self) -> Result<(), WasiFsError>

fn bytes_available(&self) -> Result<usize, WasiFsError>

fn get_raw_fd(&self) -> Option<i32>

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