102 lines
2.3 KiB
Rust
102 lines
2.3 KiB
Rust
use std::fmt;
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use std::os::raw::{c_int, c_void};
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use std::sync::Arc;
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use ffi;
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use error::Result;
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use value::MultiValue;
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use lua::Lua;
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/// Type of Lua integer numbers.
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pub type Integer = ffi::lua_Integer;
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/// Type of Lua floating point numbers.
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pub type Number = ffi::lua_Number;
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/// A "light" userdata value. Equivalent to an unmanaged raw pointer.
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#[derive(Debug, Copy, Clone, Eq, PartialEq)]
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pub struct LightUserData(pub *mut c_void);
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// Clone-able id where every clone of the same id compares equal, and are guaranteed unique.
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#[derive(Debug, Clone)]
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pub(crate) struct SharedId(Arc<()>);
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impl SharedId {
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pub(crate) fn new() -> SharedId {
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SharedId(Arc::new(()))
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}
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}
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impl PartialEq for SharedId {
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fn eq(&self, other: &SharedId) -> bool {
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Arc::ptr_eq(&self.0, &other.0)
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}
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}
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impl Eq for SharedId {}
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/// An auto generated key into the Lua registry.
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pub struct RegistryKey {
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pub(crate) lua_id: SharedId,
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pub(crate) registry_id: c_int,
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}
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pub(crate) type Callback<'lua> =
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Box<FnMut(&'lua Lua, MultiValue<'lua>) -> Result<MultiValue<'lua>> + 'lua>;
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pub(crate) struct LuaRef<'lua> {
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pub lua: &'lua Lua,
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pub registry_id: c_int,
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}
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impl<'lua> fmt::Debug for LuaRef<'lua> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "LuaRef({})", self.registry_id)
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}
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}
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impl<'lua> Clone for LuaRef<'lua> {
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fn clone(&self) -> Self {
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unsafe {
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self.lua.push_ref(self.lua.state, self);
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self.lua.pop_ref(self.lua.state)
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}
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}
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}
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impl<'lua> Drop for LuaRef<'lua> {
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fn drop(&mut self) {
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unsafe {
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ffi::luaL_unref(self.lua.state, ffi::LUA_REGISTRYINDEX, self.registry_id);
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::LightUserData;
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use function::Function;
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use lua::Lua;
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use std::os::raw::c_void;
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#[test]
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fn test_lightuserdata() {
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let lua = Lua::new();
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let globals = lua.globals();
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lua.exec::<()>(
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r#"
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function id(a)
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return a
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end
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"#,
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None,
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).unwrap();
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let res = globals
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.get::<_, Function>("id")
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.unwrap()
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.call::<_, LightUserData>(LightUserData(42 as *mut c_void))
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.unwrap();
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assert_eq!(res, LightUserData(42 as *mut c_void));
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}
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}
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