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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#include <KernelKit/UserProcessScheduler.h>
#include <KernelKit/Semaphore.h>
namespace Kernel
{
/***********************************************************************************/
/// @brief Unlocks the semaphore.
/***********************************************************************************/
Bool Semaphore::Unlock() noexcept
{
if (fLockingProcess)
{
fLockingProcess = UserProcess();
fLockingProcess.Status = ProcessStatusKind::kFrozen;
return Yes;
}
return No;
}
/***********************************************************************************/
/// @brief Locks process in the semaphore.
/***********************************************************************************/
Bool Semaphore::Lock(UserProcess& process)
{
if (!process || fLockingProcess)
return No;
fLockingProcess = process;
return Yes;
}
/***********************************************************************************/
/// @brief Checks if process is locked.
/***********************************************************************************/
Bool Semaphore::IsLocked() const
{
return fLockingProcess.Status == ProcessStatusKind::kRunning;
}
/***********************************************************************************/
/// @brief Try lock or wait.
/***********************************************************************************/
Bool Semaphore::LockOrWait(UserProcess& process, TimerInterface* timer)
{
if (timer == nullptr)
return No;
this->Lock(process);
timer->Wait();
return this->Lock(process);
}
/***********************************************************************************/
/// @brief Wait for process to be free.
/***********************************************************************************/
Void Semaphore::WaitForProcess() noexcept
{
while (fLockingProcess)
;
}
} // namespace Kernel
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