cpu.h File Reference

CPU information and utilities. More...

#include <memory>
#include <thread>

Include dependency graph for cpu.h:

Go to the source code of this file.

Classes
class	qb::CPU
	Provides platform-independent access to CPU information. More...

Namespaces
namespace	Internals
	Internal helper functions for CPU information.

Functions
template<typename T, typename TCleaner>
auto	qb::resource (T handle, TCleaner cleaner)
	Creates a unique_ptr with a custom deleter for a resource.
template<typename TCleaner>
auto	qb::resource (void *handle, TCleaner cleaner)
	Creates a unique_ptr with a custom deleter for a void* resource.
template<typename TCleaner>
auto	qb::resource (TCleaner cleaner)
	Creates a unique_ptr with a custom deleter using the deleter itself as a handle.
void	qb::spin_loop_pause () noexcept
	Fallback implementation of spin_loop_pause for platforms without CPU pause.

Detailed Description

CPU information and utilities.

This file provides platform-independent access to CPU information such as architecture, core count, and frequency. It also includes utilities for CPU-specific operations like spinlock pauses.

Author

qb - C++ Actor Framework

Copyright

Copyright (c) 2011-2025 qb - isndev (cpp.actor) Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Function Documentation

resource() [1/3]

template<typename T, typename TCleaner>

auto qb::resource	(	T	handle,
		TCleaner	cleaner )

Creates a unique_ptr with a custom deleter for a resource.

This is a helper function to manage resources in a RAII manner with a custom deleter function.

Template Parameters

T	Type of the resource
TCleaner	Type of the cleaner/deleter function

Parameters

handle	Resource handle
cleaner	Deleter function

Returns

unique_ptr wrapping the resource with the custom deleter

resource() [2/3]

template<typename TCleaner>

auto qb::resource	(	void *	handle,
		TCleaner	cleaner )

Creates a unique_ptr with a custom deleter for a void* resource.

Specialization for void* resources.

Template Parameters

TCleaner

Type of the cleaner/deleter function

Parameters

handle	Resource handle
cleaner	Deleter function

Returns

unique_ptr wrapping the resource with the custom deleter

resource() [3/3]

template<typename TCleaner>

auto qb::resource

(

TCleaner

cleaner

)

Creates a unique_ptr with a custom deleter using the deleter itself as a handle.

This variant is useful for self-contained resources.

Template Parameters

TCleaner

Type of the cleaner/deleter function

Parameters

cleaner

Deleter function

Returns

unique_ptr with the deleter pointing to itself

spin_loop_pause()

void qb::spin_loop_pause ( )

inlinenoexcept

Fallback implementation of spin_loop_pause for platforms without CPU pause.

Calls std::this_thread::yield() as a fallback.