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e8968e6bf4
This commit renames Module and ModuleOptions to context to avoid stutter confusion, e.g avoid having documentation that says things like instantiate the snapshot's module's module.
90 lines
1.8 KiB
Markdown
90 lines
1.8 KiB
Markdown
# wasi
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This module provides an implementation of the WebAssembly System Interface
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## Supported Syscalls
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### wasi_snapshot_preview1
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- [x] args_get
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- [x] args_sizes_get
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- [x] environ_get
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- [x] environ_sizes_get
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- [x] clock_res_get
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- [x] clock_time_get
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- [ ] fd_advise
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- [ ] fd_allocate
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- [x] fd_close
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- [x] fd_datasync
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- [x] fd_fdstat_get
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- [ ] fd_fdstat_set_flags
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- [ ] fd_fdstat_set_rights
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- [x] fd_filestat_get
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- [x] fd_filestat_set_size
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- [x] fd_filestat_set_times
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- [x] fd_pread
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- [x] fd_prestat_get
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- [x] fd_prestat_dir_name
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- [x] fd_pwrite
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- [x] fd_read
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- [x] fd_readdir
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- [x] fd_renumber
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- [x] fd_seek
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- [x] fd_sync
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- [x] fd_tell
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- [x] fd_write
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- [x] path_create_directory
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- [x] path_filestat_get
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- [x] path_filestat_set_times
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- [x] path_link
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- [x] path_open
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- [x] path_readlink
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- [x] path_remove_directory
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- [x] path_rename
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- [x] path_symlink
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- [x] path_unlink_file
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- [x] poll_oneoff
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- [x] proc_exit
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- [ ] proc_raise
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- [ ] sched_yield
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- [x] random_get
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- [ ] sock_recv
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- [ ] sock_send
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- [ ] sock_shutdown
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## Usage
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```typescript
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import Context from "https://deno.land/std/wasi/snapshot_preview1.ts";
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const context = new Context({
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args: Deno.args,
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env: Deno.env,
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});
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const binary = await Deno.readFile("path/to/your/module.wasm");
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const module = await WebAssembly.compile(binary);
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const instance = await WebAssembly.instantiate(module, {
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wasi_snapshot_preview1: context.exports,
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});
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context.memory = context.exports.memory;
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if (module.exports._start) {
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instance.exports._start();
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} else if (module.exports._initialize) {
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instance.exports._initialize();
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} else {
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throw new Error("No entry point found");
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}
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```
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## Testing
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The test suite for this module spawns rustc processes to compile various example
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Rust programs. You must have wasm targets enabled:
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```
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rustup target add wasm32-wasi
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rustup target add wasm32-unknown-unknown
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```
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