#!/usr/bin/env python3 # SPDX-License-Identifier: BSD-3-Clause # Copyright (C) 2020, Google Inc. # # Author: Paul Elder # # generate.py - Run mojo code generator for generating libcamera IPC files import os import sys # TODO set sys.pycache_prefix for >= python3.8 sys.dont_write_bytecode = True import mojo.public.tools.bindings.mojom_bindings_generator as generator def _GetModulePath(path, output_dir): return os.path.join(output_dir, path.relative_path()) # Override the mojo code generator's generator list to only contain our # libcamera generator generator._BUILTIN_GENERATORS = {'libcamera': 'mojom_libcamera_generator'} # Override the mojo code generator's _GetModulePath method to not add # the '-module' suffix when searching for mojo modules, so that we can # pass the path to the mojom module without having to trim the '-module' suffix generator._GetModulePath = _GetModulePath generator.main() e='h' onchange='this.form.submit();'> Jacopo Mondi's clone of libcameragit repository hosting on libcamera.org
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path: root/include/libcamera/base/signal.h
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * signal.h - Signal & slot implementation
 */

#pragma once

#include <functional>
#include <list>
#include <type_traits>
#include <vector>

#include <libcamera/base/bound_method.h>
#include <libcamera/base/object.h>

namespace libcamera {

class SignalBase
{
public:
	void disconnect(Object *object);

protected:
	using SlotList = std::list<BoundMethodBase *>;

	void connect(BoundMethodBase *slot);
	void disconnect(std::function<bool(SlotList::iterator &)> match);

	SlotList slots();

private:
	SlotList slots_;
};

template<typename... Args>
class Signal : public SignalBase
{
public:
	~Signal()
	{
		disconnect();
	}

#ifndef __DOXYGEN__
	template<typename T, typename R, std::enable_if_t<std::is_base_of<Object, T>::value> * = nullptr>
	void connect(T *obj, R (T::*func)(Args...),
		     ConnectionType type = ConnectionTypeAuto)
	{
		Object *object = static_cast<Object *>(obj);
		SignalBase::connect(new BoundMethodMember<T, R, Args...>(obj, object, func, type));
	}

	template<typename T, typename R, std::enable_if_t<!std::is_base_of<Object, T>::value> * = nullptr>
#else
	template<typename T, typename R>
#endif
	void connect(T *obj, R (T::*func)(Args...))
	{
		SignalBase::connect(new BoundMethodMember<T, R, Args...>(obj, nullptr, func));
	}

#ifndef __DOXYGEN__
	template<typename T, typename Func,
		 std::enable_if_t<std::is_base_of<Object, T>::value
#if __cplusplus >= 201703L
				  && std::is_invocable_v<Func, Args...>
#endif
				  > * = nullptr>
	void connect(T *obj, Func func, ConnectionType type = ConnectionTypeAuto)
	{
		Object *object = static_cast<Object *>(obj);
		SignalBase::connect(new BoundMethodFunctor<T, void, Func, Args...>(obj, object, func, type));
	}

	template<typename T, typename Func,
		 std::enable_if_t<!std::is_base_of<Object, T>::value
#if __cplusplus >= 201703L
				  && std::is_invocable_v<Func, Args...>
#endif
				  > * = nullptr>
#else
	template<typename T, typename Func>
#endif
	void connect(T *obj, Func func)
	{
		SignalBase::connect(new BoundMethodFunctor<T, void, Func, Args...>(obj, nullptr, func));
	}

	template<typename R>
	void connect(R (*func)(Args...))
	{
		SignalBase::connect(new BoundMethodStatic<R, Args...>(func));
	}

	void disconnect()
	{
		SignalBase::disconnect([]([[maybe_unused]] SlotList::iterator &iter) {
			return true;
		});
	}

	template<typename T>
	void disconnect(T *obj)
	{
		SignalBase::disconnect([obj](SlotList::iterator &iter) {
			return (*iter)->match(obj);
		});
	}

	template<typename T, typename R>
	void disconnect(T *obj, R (T::*func)(Args...))
	{
		SignalBase::disconnect([obj, func](SlotList::iterator &iter) {
			BoundMethodArgs<R, Args...> *slot =
				static_cast<BoundMethodArgs<R, Args...> *>(*iter);

			if (!slot->match(obj))
				return false;

			/*
			 * If the object matches the slot, the slot is
			 * guaranteed to be a member slot, so we can safely
			 * cast it to BoundMethodMember<T, Args...> to match
			 * func.
			 */
			return static_cast<BoundMethodMember<T, R, Args...> *>(slot)->match(func);