Crate wasmer_wasi

Wasmer’s WASI implementation

Use generate_import_object to create an Imports. This Imports can be combined with a module to create an Instance which can execute WASI Wasm functions.

See state for the experimental WASI FS API. Also see the WASI plugin example for an example of how to extend WASI using the WASI FS API.

Modules

• types

Structs

• Fd
• Pipe
  For piping stdio. Stores all output / input in a byte-vector.
• PluggableRuntimeImplementation
• Stderr
  A wrapper type around Stderr that implements VirtualFile and Serialize + Deserialize.
• Stdin
  A wrapper type around Stdin that implements VirtualFile and Serialize + Deserialize.
• Stdout
  A wrapper type around Stdout that implements VirtualFile and Serialize + Deserialize.
• UnsupportedVirtualBus
• UnsupportedVirtualNetworking
• WasiBusProcessId
  Represents the ID of a sub-process
• WasiEnv
  The environment provided to the WASI imports.
• WasiFs
  Warning, modifying these fields directly may cause invariants to break and should be considered unsafe. These fields may be made private in a future release
• WasiFunctionEnv
• WasiInodes
• WasiState
  Top level data type containing all* the state with which WASI can interact.
• WasiStateBuilder
  Convenient builder API for configuring WASI via WasiState.
• WasiThread
• WasiThreadId
  Represents the ID of a WASI thread
• WasiTtyState

Enums

• FsError
  Error type for external users
• WasiError
  This is returned in RuntimeError. Use downcast or downcast_ref to retrieve the ExitCode.
• WasiFsError
  Error type for external users
• WasiStateCreationError
  Error type returned when bad data is given to WasiStateBuilder.
• WasiThreadError
• WasiVersion
  The version of WASI. This is determined by the imports namespace string.

Constants

• ALL_RIGHTS
  all the rights enabled
• VIRTUAL_ROOT_FD
  the fd value of the virtual root

Traits

• VirtualBus
• VirtualFile
  This trait relies on your file closing when it goes out of scope via Drop
• VirtualNetworking
  An implementation of virtual networking
• WasiFile
  This trait relies on your file closing when it goes out of scope via Drop
• WasiRuntimeImplementation
  Represents an implementation of the WASI runtime - by default everything is unimplemented.

Functions

• generate_import_object_from_env
  Create an Imports from a [Context]
• get_wasi_version
  Detect the version of WASI being used based on the import namespaces.
• get_wasi_versions
  Like get_wasi_version but detects multiple WASI versions in a single module. Thus strict behaves differently in this function as multiple versions are always supported. strict indicates whether non-WASI imports should trigger a failure or be ignored.
• import_object_for_all_wasi_versions
• is_wasi_module
  Check if a provided module is compiled for some version of WASI. Use get_wasi_version to find out which version of WASI the module is.
• is_wasix_module
  Returns if the module is WASIX or not
• wasi_import_shared_memory
  Imports (any) shared memory into the imports. (if the module does not import memory then this function is ignored)