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denoland-deno/std/wasi/README.md
Casper Beyer c5611636fb
feat(std/wasi): add start method to Context (#8141)
This adds a start method to the Context to make starting a command less
tedious and yield consistent errors.

Manually setting the memory is still valid for more complex scenarios,
just undocumented for the time being.
2020-11-02 18:50:45 +01:00

1.4 KiB

wasi

This module provides an implementation of the WebAssembly System Interface.

Supported Syscalls

wasi_snapshot_preview1

  • args_get
  • args_sizes_get
  • environ_get
  • environ_sizes_get
  • clock_res_get
  • clock_time_get
  • fd_advise
  • fd_allocate
  • fd_close
  • fd_datasync
  • fd_fdstat_get
  • fd_fdstat_set_flags
  • fd_fdstat_set_rights
  • fd_filestat_get
  • fd_filestat_set_size
  • fd_filestat_set_times
  • fd_pread
  • fd_prestat_get
  • fd_prestat_dir_name
  • fd_pwrite
  • fd_read
  • fd_readdir
  • fd_renumber
  • fd_seek
  • fd_sync
  • fd_tell
  • fd_write
  • path_create_directory
  • path_filestat_get
  • path_filestat_set_times
  • path_link
  • path_open
  • path_readlink
  • path_remove_directory
  • path_rename
  • path_symlink
  • path_unlink_file
  • poll_oneoff
  • proc_exit
  • proc_raise
  • sched_yield
  • random_get
  • sock_recv
  • sock_send
  • sock_shutdown

Usage

import Context from "https://deno.land/std@$STD_VERSION/wasi/snapshot_preview1.ts";

const context = new Context({
  args: Deno.args,
  env: Deno.env.toObject(),
});

const binary = await Deno.readFile("path/to/your/module.wasm");
const module = await WebAssembly.compile(binary);
const instance = await WebAssembly.instantiate(module, {
  "wasi_snapshot_preview1": context.exports,
});

context.start(instance);