122 lines
2.7 KiB
C++
122 lines
2.7 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: Semaphore.Unix.cpp
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Date: 2021-6-12
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "Semaphore.Generic.hpp"
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#include "Semaphore.Unix.hpp"
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#if !defined(_AURUNTIME_GENERIC_SEMAPHORE) && !defined(AURORA_IS_XNU_DERIVED)
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#include <Source/Time/Time.hpp>
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namespace Aurora::Threading::Primitives
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{
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Semaphore::Semaphore(long intialValue)
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{
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auto status = sem_init(&this->value_, 0, intialValue) == 0;
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SysAssert(status, "Semaphore init failed");
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}
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Semaphore::~Semaphore()
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{
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int status = sem_destroy(&this->value_);
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RUNTIME_ASSERT_SHUTDOWN_SAFE(status == 0, "Semaphore destroy failed: {} {}", status, errno);
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}
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bool Semaphore::HasOSHandle(AuMach &mach)
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{
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mach = reinterpret_cast<AuMach>(&this->value_);
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return true;
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}
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bool Semaphore::HasLockImplementation()
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{
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return true;
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}
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bool Semaphore::TryLock()
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{
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return sem_trywait(&this->value_) == 0;
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}
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bool Semaphore::Lock(AuUInt64 timeout)
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{
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if (timeout == 0)
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{
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int ret {};
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do
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{
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if ((ret = sem_wait(&this->value_)) == 0)
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{
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return true;
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}
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} while (errno == EINTR);
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SysPanic("semaphore lock failed {}", errno);
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return true;
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}
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else
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{
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struct timespec tspec;
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Time::ms2tsabs(&tspec, timeout);
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int ret {};
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do
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{
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ret = sem_timedwait(&this->value_, &tspec);
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if (ret == 0)
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{
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return true;
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}
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if (errno == ETIMEDOUT)
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{
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return false;
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}
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} while (errno == EINTR);
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SysPanic("semaphore timed lock failed");
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return true;
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}
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}
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void Semaphore::Lock()
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{
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auto status = Lock(0);
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SysAssert(status, "Couldn't lock semaphore");
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}
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void Semaphore::Unlock(long count)
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{
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for (int i = 0; i < count; i++)
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{
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Unlock();
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}
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}
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void Semaphore::Unlock()
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{
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auto status = sem_post(&this->value_) == 0;
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SysAssert(status, "Semaphore release error");
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}
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AUKN_SYM ISemaphore *SemaphoreNew(int initialCount)
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{
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return _new Semaphore(initialCount);
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}
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AUKN_SYM void SemaphoreRelease(ISemaphore *waitable)
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{
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AuSafeDelete<Semaphore *>(waitable);
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}
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}
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#endif
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