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fa22956a86
Follow-up to #16208. - Refactors build.rs behaviour to use `-exported_symbols_list` / `--export-dynamic-symbol-list` - Since all build systems now rely on a symbols list file, I have added `generate_exported_symbols_list`, which derives the symbol list file depending on the platform, which makes `tools/napi/generate_link_win.js` redundant. - Fixes a missed instance of `i8` being used instead of `c_char` Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
34 lines
1,020 B
Markdown
34 lines
1,020 B
Markdown
# napi_sym
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A proc_macro for Deno's Node-API implementation. It does the following things:
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- Marks the symbol as `#[no_mangle]` and rewrites it as `pub extern "C" $name`.
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- Asserts that the function symbol is present in
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[`symbol_exports.json`](./symbol_exports.json).
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- Maps `deno_napi::Result` to raw `napi_result`.
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```rust
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use deno_napi::{napi_value, Env, Error, Result};
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#[napi_sym::napi_sym]
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fn napi_get_boolean(
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env: *mut Env,
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value: bool,
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result: *mut napi_value,
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) -> Result {
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let _env: &mut Env = env.as_mut().ok_or(Error::InvalidArg)?;
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// *result = ...
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Ok(())
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}
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```
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### `symbol_exports.json`
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A file containing the symbols that need to be put into the executable's dynamic
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symbol table at link-time.
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This is done using `/DEF:` on Windows, `-exported_symbol,_` on macOS and
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`--export-dynamic-symbol=` on Linux. See [`cli/build.rs`](../build.rs).
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On Windows, you need to generate the `.def` file by running
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[`tools/napi/generate_symbols_lists.js`](../../tools/napi/generate_symbols_lists.js).
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