mirror of
https://git.suyu.dev/suyu/suyu.git
synced 2024-12-27 10:50:57 +01:00
kernel: convert KAbstractSchedulerLock
This commit is contained in:
parent
467adc1acd
commit
7322c99e5f
1 changed files with 24 additions and 31 deletions
|
@ -14,74 +14,67 @@
|
|||
namespace Kernel {
|
||||
|
||||
class KernelCore;
|
||||
class GlobalSchedulerContext;
|
||||
|
||||
template <typename SchedulerType>
|
||||
class KAbstractSchedulerLock {
|
||||
public:
|
||||
explicit KAbstractSchedulerLock(KernelCore& kernel_) : kernel{kernel_} {}
|
||||
explicit KAbstractSchedulerLock(KernelCore& kernel) : m_kernel{kernel} {}
|
||||
|
||||
bool IsLockedByCurrentThread() const {
|
||||
return owner_thread == GetCurrentThreadPointer(kernel);
|
||||
return m_owner_thread == GetCurrentThreadPointer(m_kernel);
|
||||
}
|
||||
|
||||
void Lock() {
|
||||
// If we are shutting down the kernel, none of this is relevant anymore.
|
||||
if (kernel.IsShuttingDown()) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (IsLockedByCurrentThread()) {
|
||||
if (this->IsLockedByCurrentThread()) {
|
||||
// If we already own the lock, the lock count should be > 0.
|
||||
// For debug, ensure this is true.
|
||||
ASSERT(lock_count > 0);
|
||||
ASSERT(m_lock_count > 0);
|
||||
} else {
|
||||
// Otherwise, we want to disable scheduling and acquire the spinlock.
|
||||
SchedulerType::DisableScheduling(kernel);
|
||||
spin_lock.Lock();
|
||||
SchedulerType::DisableScheduling(m_kernel);
|
||||
m_spin_lock.Lock();
|
||||
|
||||
ASSERT(lock_count == 0);
|
||||
ASSERT(owner_thread == nullptr);
|
||||
ASSERT(m_lock_count == 0);
|
||||
ASSERT(m_owner_thread == nullptr);
|
||||
|
||||
// Take ownership of the lock.
|
||||
owner_thread = GetCurrentThreadPointer(kernel);
|
||||
m_owner_thread = GetCurrentThreadPointer(m_kernel);
|
||||
}
|
||||
|
||||
// Increment the lock count.
|
||||
lock_count++;
|
||||
m_lock_count++;
|
||||
}
|
||||
|
||||
void Unlock() {
|
||||
// If we are shutting down the kernel, none of this is relevant anymore.
|
||||
if (kernel.IsShuttingDown()) {
|
||||
return;
|
||||
}
|
||||
|
||||
ASSERT(IsLockedByCurrentThread());
|
||||
ASSERT(lock_count > 0);
|
||||
ASSERT(this->IsLockedByCurrentThread());
|
||||
ASSERT(m_lock_count > 0);
|
||||
|
||||
// Release an instance of the lock.
|
||||
if ((--lock_count) == 0) {
|
||||
if ((--m_lock_count) == 0) {
|
||||
// Perform a memory barrier here.
|
||||
std::atomic_thread_fence(std::memory_order_seq_cst);
|
||||
|
||||
// We're no longer going to hold the lock. Take note of what cores need scheduling.
|
||||
const u64 cores_needing_scheduling =
|
||||
SchedulerType::UpdateHighestPriorityThreads(kernel);
|
||||
SchedulerType::UpdateHighestPriorityThreads(m_kernel);
|
||||
|
||||
// Note that we no longer hold the lock, and unlock the spinlock.
|
||||
owner_thread = nullptr;
|
||||
spin_lock.Unlock();
|
||||
m_owner_thread = nullptr;
|
||||
m_spin_lock.Unlock();
|
||||
|
||||
// Enable scheduling, and perform a rescheduling operation.
|
||||
SchedulerType::EnableScheduling(kernel, cores_needing_scheduling);
|
||||
SchedulerType::EnableScheduling(m_kernel, cores_needing_scheduling);
|
||||
}
|
||||
}
|
||||
|
||||
private:
|
||||
KernelCore& kernel;
|
||||
KAlignedSpinLock spin_lock{};
|
||||
s32 lock_count{};
|
||||
std::atomic<KThread*> owner_thread{};
|
||||
friend class GlobalSchedulerContext;
|
||||
|
||||
KernelCore& m_kernel;
|
||||
KAlignedSpinLock m_spin_lock{};
|
||||
s32 m_lock_count{};
|
||||
std::atomic<KThread*> m_owner_thread{};
|
||||
};
|
||||
|
||||
} // namespace Kernel
|
||||
|
|
Loading…
Reference in a new issue