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1d621ab172
This adds support for FUTEX_WAKE_OP, FUTEX_WAIT_BITSET, FUTEX_WAKE_BITSET, FUTEX_REQUEUE, and FUTEX_CMP_REQUEUE, as well well as global and private futex and absolute/relative timeouts against the appropriate clock. This also changes the implementation so that kernel resources are only used when a thread is blocked on a futex. Global futexes are implemented as offsets in VMObjects, so that different processes can share a futex against the same VMObject despite potentially being mapped at different virtual addresses.
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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namespace Kernel {
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class BlockDevice;
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class CharacterDevice;
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class CoreDump;
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class Custody;
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class Device;
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class DiskCache;
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class DoubleBuffer;
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class File;
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class FileDescription;
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class FutexQueue;
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class IPv4Socket;
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class Inode;
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class InodeIdentifier;
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class SharedInodeVMObject;
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class InodeWatcher;
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class KBuffer;
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class KResult;
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class LocalSocket;
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class Lock;
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class MappedROM;
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class MasterPTY;
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class PageDirectory;
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class PerformanceEventBuffer;
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class PhysicalPage;
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class PhysicalRegion;
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class Process;
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class ProcessGroup;
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class ThreadTracer;
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class Range;
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class RangeAllocator;
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class Region;
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class Scheduler;
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class SchedulerPerProcessorData;
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class Socket;
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template<typename BaseType>
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class SpinLock;
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class RecursiveSpinLock;
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template<typename LockType>
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class ScopedSpinLock;
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class TCPSocket;
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class TTY;
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class Thread;
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class UDPSocket;
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class UserOrKernelBuffer;
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class VFS;
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class VMObject;
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class WaitQueue;
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template<typename T>
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class KResultOr;
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}
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