71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: LSMutex.Linux.cpp
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Date: 2021-10-1
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Date: 2022-4-4
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "LSMutex.hpp"
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#include "LSFromFdNonblocking.hpp"
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namespace Aurora::Loop
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{
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LSMutex::LSMutex()
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{
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}
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bool LSMutex::OnTrigger(AuUInt handle)
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{
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AuUInt64 oldSemaphoreValue {};
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auto ok = read(this->handle, &oldSemaphoreValue, sizeof(oldSemaphoreValue)) == 8;
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SysAssertDbg(oldSemaphoreValue == 1, "Double unlock caught");
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return ok;
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}
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void LSMutex::Init()
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{
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handle = eventfd(1, EFD_NONBLOCK);
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}
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bool LSMutex::Unlock()
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{
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AuUInt64 plsNoOverflow {1};
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return write(this->handle, &plsNoOverflow, sizeof(plsNoOverflow)) == 8;
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}
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bool LSMutex::IsSignaled()
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{
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return IsSignaledFromNonblockingImpl(this, this, &LSMutex::IsSignaledNonblocking);
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}
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bool LSMutex::IsSignaledNonblocking()
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{
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AuUInt64 oldSemaphoreValue {};
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auto ok = read(this->handle, &oldSemaphoreValue, sizeof(oldSemaphoreValue)) == 8;
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SysAssertDbg(!ok || oldSemaphoreValue == 1, "Double unlock caught");
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return ok;
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}
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ELoopSource LSMutex::GetType()
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{
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return ELoopSource::eSourceMutex;
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}
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AUKN_SYM AuSPtr<ILSMutex> NewLSMutex()
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{
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auto mutex = AuMakeShared<LSMutex>();
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if (!mutex)
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{
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return {};
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}
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if (!mutex->HasValidHandle())
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{
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return {};
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}
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return mutex;
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}
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} |