Struct WasiState 

pub(crate) struct WasiState {
    pub secret: [u8; 32],
    pub fs: WasiFs,
    pub inodes: WasiInodes,
    pub futexs: Mutex<WasiFutexState>,
    pub clock_offset: Mutex<HashMap<Snapshot0Clockid, i64>>,
    pub args: Mutex<Vec<String>>,
    pub envs: Mutex<Vec<Vec<u8>>>,
    pub signals: Mutex<HashMap<Signal, Disposition>>,
    pub signal_handler_registered: AtomicBool,
    pub preopen: Vec<String>,
}

Top level data type containing all* the state with which WASI can interact.

• The contents of files are not stored and may be modified by other, concurrently running programs. Data such as the contents of directories are lazily loaded.

Fields

secret: [u8; 32]

fs: WasiFs

inodes: WasiInodes

futexs: Mutex<WasiFutexState>

clock_offset: Mutex<HashMap<Snapshot0Clockid, i64>>

args: Mutex<Vec<String>>

envs: Mutex<Vec<Vec<u8>>>

signals: Mutex<HashMap<Signal, Disposition>>

signal_handler_registered: AtomicBool

Whether this process has registered a signal handler callback.

WasiModuleInstanceHandles::signal_set only records whether the instance doing the asking registered one, and every spawned thread gets its own instance. Signals are delivered to all of a process’s threads, so a per-instance flag makes sibling threads believe the program handles no signals and apply the runtime’s default disposition – terminating a process that does in fact have a handler installed.

preopen: Vec<String>

Implementations

impl WasiState

pub(crate) fn fs_read_dir<P: AsRef<Path>>( &self, path: P, ) -> Result<ReadDir, Errno>

pub(crate) fn fs_create_dir<P: AsRef<Path>>(&self, path: P) -> Result<(), Errno>

pub(crate) fn fs_remove_dir<P: AsRef<Path>>(&self, path: P) -> Result<(), Errno>

pub(crate) async fn fs_rename<P: AsRef<Path>, Q: AsRef<Path>>( &self, from: P, to: Q, ) -> Result<(), Errno>

pub(crate) fn fs_remove_file<P: AsRef<Path>>( &self, path: P, ) -> Result<(), Errno>

pub(crate) fn fs_new_open_options(&self) -> OpenOptions<'_>

pub fn stdout( &self, ) -> Result<Option<Box<dyn VirtualFile + Send + Sync + 'static>>, FsError>

Get the VirtualFile object at stdout

pub fn stderr( &self, ) -> Result<Option<Box<dyn VirtualFile + Send + Sync + 'static>>, FsError>

Get the VirtualFile object at stderr

pub fn stdin( &self, ) -> Result<Option<Box<dyn VirtualFile + Send + Sync + 'static>>, FsError>

Get the VirtualFile object at stdin

fn std_dev_get( &self, fd: WasiFd, ) -> Result<Option<Box<dyn VirtualFile + Send + Sync + 'static>>, FsError>

Internal helper function to get a standard device handle. Expects one of __WASI_STDIN_FILENO, __WASI_STDOUT_FILENO, __WASI_STDERR_FILENO.

pub fn fork(&self) -> Self

Forking the WasiState is used when either fork or vfork is called

Trait Implementations

impl Debug for WasiState

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

Formats the value using the given formatter.