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Diffstat (limited to 'ops/README.md')
| -rw-r--r-- | ops/README.md | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/ops/README.md b/ops/README.md index 441b526ca..39d860663 100644 --- a/ops/README.md +++ b/ops/README.md @@ -34,8 +34,8 @@ Cases where code is optimized away: The macro will infer and try to auto generate V8 fast API call trait impl for `sync` ops with: -- arguments: integers, bool, `&mut OpState`, `&[u8]`, &mut [u8]`,`&[u32]`,`&mut - [u32]` +- arguments: integers, bool, `&mut OpState`, `&[u8]`, `&mut [u8]`, `&[u32]`, + `&mut [u32]` - return_type: integers, bool The `#[op(fast)]` attribute should be used to enforce fast call generation at @@ -43,3 +43,20 @@ compile time. Trait gen for `async` ops & a ZeroCopyBuf equivalent type is planned and will be added soon. + +### Wasm calls + +The `#[op(wasm)]` attribute should be used for calls expected to be called from +Wasm. This enables the fast call generation and allows seamless `WasmMemory` +integration for generic and fast calls. + +```rust +#[op(wasm)] +pub fn op_args_get( + offset: i32, + buffer_offset: i32, + memory: Option<&[u8]>, // Must be last parameter. Some(..) when entered from Wasm. +) { + // ... +} +``` |