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Removed allocation in favor of stack

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This commit is contained in:
selimaj-dev
2026-06-12 15:53:51 +02:00
parent 076f1f6d33
commit 5a1285a2a8
1 changed files with 14 additions and 12 deletions
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crates/codegen/src/class_decl.rs
+14 -12
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@@ -107,13 +107,15 @@ impl ClassProcessedData {
cg.indent += 1; cg.indent += 1;
cg.add_indentedln( cg.add_indentedln(
"pub _m_oop: (&'static [*const std::ffi::c_void], *mut std::ffi::c_void),", "pub _vptr: (&'static [*const std::ffi::c_void], *mut std::ffi::c_void),",
); );
cg.add_indentedln("_pin: std::marker::PhantomPinned,");
if let Some(ref inherits) = self.inherits { if let Some(ref inherits) = self.inherits {
cg.add_indented("pub _super: Box<"); cg.add_indented("pub _super: ");
cg.add(&get_type_from_path(inherits).get_rust()); cg.add(&get_type_from_path(inherits).get_rust());
cg.addln(">,"); cg.addln(",");
} }
for field in &self.fields { for field in &self.fields {
@@ -321,12 +323,12 @@ impl ClassProcessedData {
param.gen_rust(ctx, cg); param.gen_rust(ctx, cg);
} }
cg.addln(") -> Box<Self> {"); cg.addln(") -> Self {");
cg.indent += 1; cg.indent += 1;
cg.add_indentedln("let mut this = Box::new(unsafe { std::mem::MaybeUninit::<Self>::zeroed().assume_init() });"); cg.add_indentedln("let mut this: Self = unsafe { std::mem::MaybeUninit::<Self>::zeroed().assume_init() };");
cg.add_indentedln("let this_ptr = &mut *this as *mut Self as *mut std::ffi::c_void;"); cg.add_indentedln("let this_ptr = &mut this as *mut Self as *mut std::ffi::c_void;");
cg.add_indentedln("this._m_oop = (&Self::__V_TABLE, this_ptr);"); cg.add_indentedln("this._vptr = (&Self::__V_TABLE, this_ptr);");
// Inline field declarations and initializers // Inline field declarations and initializers
for field in &self.fields { for field in &self.fields {
@@ -355,7 +357,7 @@ impl ClassProcessedData {
// Direct base class layout updates // Direct base class layout updates
None => { None => {
cg.add_indentedln(&format!( cg.add_indentedln(&format!(
"this._super._m_oop.0 = Self::__SUPER_V_TABLES[{}];", "this._super._vptr.0 = Self::__SUPER_V_TABLES[{}];",
idx idx
)); ));
} }
@@ -363,7 +365,7 @@ impl ClassProcessedData {
Some(path) => { Some(path) => {
cg.add_indentedln(&v.get_comment()); cg.add_indentedln(&v.get_comment());
cg.add_indentedln(&format!( cg.add_indentedln(&format!(
"(|v: &mut {}| {{v._m_oop.0 = Self::__SUPER_V_TABLES[{}];}})(&mut this);", "(|v: &mut {}| {{v._vptr = (Self::__SUPER_V_TABLES[{}], this_ptr);}})(&mut this);",
path.get_rust(), path.get_rust(),
idx idx
)); ));
@@ -552,7 +554,7 @@ pub fn gen_method_point(method: &FunctionDecl, ctx: &mut Context, cg: &mut RustC
cg.indent += 1; cg.indent += 1;
cg.add_indentedln(&format!( cg.add_indentedln(&format!(
"let func_ptr = self._m_oop.0[Self::__FN_{}];", "let func_ptr = self._vptr.0[Self::__FN_{}];",
method.name.0.to_uppercase() method.name.0.to_uppercase()
)); ));
@@ -588,11 +590,11 @@ pub fn gen_method_point(method: &FunctionDecl, ctx: &mut Context, cg: &mut RustC
cg.add(&TypeExpr::StaticFn(param_types, method.return_type.clone().map(Box::new)).get_rust()); cg.add(&TypeExpr::StaticFn(param_types, method.return_type.clone().map(Box::new)).get_rust());
cg.addln(" = std::mem::transmute(func_ptr);"); cg.addln(" = std::mem::transmute(func_ptr);");
cg.add_indented("func(self._m_oop.1"); cg.add_indented("func(self._vptr.1");
for (i, param) in &params { for (i, param) in &params {
if *i == 0 { if *i == 0 {
continue; // self._m_oop.1 already fulfills it continue; // self._vptr.1 already fulfills it
} }
cg.add(", "); cg.add(", ");
ctx.expr_ensure_semicolon = false; ctx.expr_ensure_semicolon = false;