97 lines
2.4 KiB
Rust
97 lines
2.4 KiB
Rust
#[cfg(windows)]
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macro_rules! generate {
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(extern "C" {
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$(fn $name:ident($($param:ident: $ptype:ty$(,)?)*)$( -> $rtype:ty)?;)+
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}) => {
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struct Napi {
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$(
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$name: unsafe extern "C" fn(
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$($param: $ptype,)*
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)$( -> $rtype)*,
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)*
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}
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#[inline(never)]
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fn panic_load<T>() -> T {
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panic!("Must load N-API bindings")
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}
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static mut NAPI: Napi = {
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$(
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unsafe extern "C" fn $name($(_: $ptype,)*)$( -> $rtype)* {
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panic_load()
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}
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)*
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Napi {
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$(
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$name,
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)*
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}
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};
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pub unsafe fn load(
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host: &libloading::Library,
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) -> Result<(), libloading::Error> {
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NAPI = Napi {
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$(
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$name: {
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let symbol: Result<libloading::Symbol<unsafe extern "C" fn ($(_: $ptype,)*)$( -> $rtype)*>, libloading::Error> = host.get(stringify!($name).as_bytes());
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match symbol {
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Ok(f) => *f,
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Err(e) => {
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debug_assert!({
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println!("Load Node-API [{}] from host runtime failed: {}", stringify!($name), e);
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true
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});
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return Ok(());
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}
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}
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},
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)*
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};
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Ok(())
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}
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$(
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#[inline]
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#[allow(clippy::missing_safety_doc)]
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pub unsafe fn $name($($param: $ptype,)*)$( -> $rtype)* {
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(NAPI.$name)($($param,)*)
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}
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)*
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};
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}
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#[cfg(not(windows))]
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macro_rules! generate {
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(extern "C" {
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$(fn $name:ident($($param:ident: $ptype:ty$(,)?)*)$( -> $rtype:ty)?;)+
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}) => {
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extern "C" {
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$(
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pub fn $name($($param: $ptype,)*)$( -> $rtype)*;
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) *
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}
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};
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}
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mod functions;
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mod types;
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pub use functions::*;
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pub use types::*;
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/// Loads N-API symbols from host process.
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/// Must be called at least once before using any functions in bindings or
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/// they will panic.
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/// Safety: `env` must be a valid `napi_env` for the current thread
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#[cfg(windows)]
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#[allow(clippy::missing_safety_doc)]
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pub unsafe fn setup() -> libloading::Library {
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match load() {
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Err(err) => panic!("{}", err),
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Ok(l) => l,
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}
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}
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