A WebAssembly System Interface Implementation for Deno

栏目: IT技术 · 发布时间: 5年前

内容简介：This package provides an implementation of theThis is a work in progress so if a function isn't implemented, hit refresh.

WebAssembly System Interface implementation for Deno

This package provides an implementation of the WebAssembly System Interface for the Deno TypeScript runtime.

Status

This is a work in progress so if a function isn't implemented, hit refresh.

Name	Status	Notes
`args_get`	✓
`args_sizes_get`	✓
`environ_get`	✓
`environ_sizes_get`	✓
`clock_res_get`	✓
`clock_time_get`	✓
`fd_advise`		This has no obvious path to implementation at this time.
`fd_allocate`		This has no obvious path to implementation at this time.
`fd_close`	✓
`fd_datasync`		This is blocking on getting fdatasync(2) implemented upstream in Deno.
`fd_fdstat_get`	✓	This currently does not write flags and rights as we do not track those at the moment.
`fd_fdstat_set_flags`		This has no obvious path to implementation at this time.
`fd_fdstat_set_rights`
`fd_filestat_get`		This is blocking on getting fstat implemented upstream in Deno.
`fd_filestat_set_size`		This is blocking on getting ftruncate implemented upstream in Deno.
`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`	✓	This is blocking on getting fsync(2) implemented upstream in Deno.
`fd_tell`	✓
`fd_write`	✓
`path_create_directory`	✓
`path_filestat_get`	✓
`path_filestat_set_times`	✓
`path_link`	✓
`path_open`	✓	Opening directories is not portable
`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`

Example

import WASI from "https://deno.land/x/wasi/mod.ts";

const wasi = new WASI({
	args: Deno.args,
	env: Deno.env,
});

const binary = Deno.readAll("command.wasm");
const module = await WebAssembly.compile(binary);
const instance = await WebAssembly.instantiate(module, {
	wasi_snapshot_preview1: wasi.exports,
});

wasi.memory = module.exports.memory;

if (module.exports._start) {
	instance.exports._start();
} else if (module.exports._initialize) {
	instance.exports._initialize();
} else {
	throw new Error("No entry point found");
}

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