aria::abi::SlotErased Class Reference

Type-erased callback wrapper. More...

#include <slot.hpp>

Public Types
using	Invoker = void (*)(void* state, void* args) noexcept
using	Destroyer = void (*)(void* state) noexcept

Public Member Functions
	SlotErased () noexcept=default
	SlotErased (Invoker inv, Destroyer dtor, void *state) noexcept
	~SlotErased () noexcept
	SlotErased (SlotErased &&o) noexcept
SlotErased &	operator= (SlotErased &&o) noexcept
	SlotErased (const SlotErased &)=delete
SlotErased &	operator= (const SlotErased &)=delete
void	invoke (void *args) const noexcept
bool	empty () const noexcept

Detailed Description

Type-erased callback wrapper.

Stores a callable that takes a single void* "args" pointer (the caller is responsible for casting).

Why void* instead of std::function?

• An explicit invoker/destroyer pair keeps allocation and destruction in the module that owns the callable.
• ABI stable (no template).
• Templates in core/ wrap this with strong typing.

NOTE: SlotErased is move-only. state_ is an opaque owning pointer; moves transfer ownership by copying the pointer, so no "move" function pointer is required (unlike some small-buffer-optimized designs).

The dtor / move ops are defined out-of-line in slot.cpp so the (trivial) destruction of state_ is not inlined into every TU, which keeps code size small and improves compile times.

Member Typedef Documentation

Invoker

using aria::abi::SlotErased::Invoker = void (*)(void* state, void* args) noexcept

Destroyer

using aria::abi::SlotErased::Destroyer = void (*)(void* state) noexcept

Constructor & Destructor Documentation

SlotErased() [1/4]

aria::abi::SlotErased::SlotErased ( )

defaultnoexcept

SlotErased() [2/4]

aria::abi::SlotErased::SlotErased ( Invoker inv, Destroyer dtor, void * state )

inlinenoexcept

~SlotErased()

aria::abi::SlotErased::~SlotErased ( )

noexcept

SlotErased() [3/4]

aria::abi::SlotErased::SlotErased ( SlotErased && o )

noexcept

SlotErased() [4/4]

aria::abi::SlotErased::SlotErased ( const SlotErased & )

delete

Member Function Documentation

operator=() [1/2]

SlotErased & aria::abi::SlotErased::operator= ( SlotErased && o )

noexcept

operator=() [2/2]

SlotErased & aria::abi::SlotErased::operator= ( const SlotErased & )

delete

invoke()

void aria::abi::SlotErased::invoke ( void * args ) const

inlinenoexcept

empty()

bool aria::abi::SlotErased::empty ( ) const

inlinenodiscardnoexcept

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The documentation for this class was generated from the following file:

• modules/abi/include/aria/abi/slot.hpp