mirror of
https://git.h3cjp.net/H3cJP/yuzu.git
synced 2024-11-15 15:52:51 +00:00
kernel: convert KAbstractSchedulerLock
This commit is contained in:
parent
467adc1acd
commit
7322c99e5f
|
@ -14,74 +14,67 @@
|
||||||
namespace Kernel {
|
namespace Kernel {
|
||||||
|
|
||||||
class KernelCore;
|
class KernelCore;
|
||||||
|
class GlobalSchedulerContext;
|
||||||
|
|
||||||
template <typename SchedulerType>
|
template <typename SchedulerType>
|
||||||
class KAbstractSchedulerLock {
|
class KAbstractSchedulerLock {
|
||||||
public:
|
public:
|
||||||
explicit KAbstractSchedulerLock(KernelCore& kernel_) : kernel{kernel_} {}
|
explicit KAbstractSchedulerLock(KernelCore& kernel) : m_kernel{kernel} {}
|
||||||
|
|
||||||
bool IsLockedByCurrentThread() const {
|
bool IsLockedByCurrentThread() const {
|
||||||
return owner_thread == GetCurrentThreadPointer(kernel);
|
return m_owner_thread == GetCurrentThreadPointer(m_kernel);
|
||||||
}
|
}
|
||||||
|
|
||||||
void Lock() {
|
void Lock() {
|
||||||
// If we are shutting down the kernel, none of this is relevant anymore.
|
if (this->IsLockedByCurrentThread()) {
|
||||||
if (kernel.IsShuttingDown()) {
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (IsLockedByCurrentThread()) {
|
|
||||||
// If we already own the lock, the lock count should be > 0.
|
// If we already own the lock, the lock count should be > 0.
|
||||||
// For debug, ensure this is true.
|
// For debug, ensure this is true.
|
||||||
ASSERT(lock_count > 0);
|
ASSERT(m_lock_count > 0);
|
||||||
} else {
|
} else {
|
||||||
// Otherwise, we want to disable scheduling and acquire the spinlock.
|
// Otherwise, we want to disable scheduling and acquire the spinlock.
|
||||||
SchedulerType::DisableScheduling(kernel);
|
SchedulerType::DisableScheduling(m_kernel);
|
||||||
spin_lock.Lock();
|
m_spin_lock.Lock();
|
||||||
|
|
||||||
ASSERT(lock_count == 0);
|
ASSERT(m_lock_count == 0);
|
||||||
ASSERT(owner_thread == nullptr);
|
ASSERT(m_owner_thread == nullptr);
|
||||||
|
|
||||||
// Take ownership of the lock.
|
// Take ownership of the lock.
|
||||||
owner_thread = GetCurrentThreadPointer(kernel);
|
m_owner_thread = GetCurrentThreadPointer(m_kernel);
|
||||||
}
|
}
|
||||||
|
|
||||||
// Increment the lock count.
|
// Increment the lock count.
|
||||||
lock_count++;
|
m_lock_count++;
|
||||||
}
|
}
|
||||||
|
|
||||||
void Unlock() {
|
void Unlock() {
|
||||||
// If we are shutting down the kernel, none of this is relevant anymore.
|
ASSERT(this->IsLockedByCurrentThread());
|
||||||
if (kernel.IsShuttingDown()) {
|
ASSERT(m_lock_count > 0);
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
ASSERT(IsLockedByCurrentThread());
|
|
||||||
ASSERT(lock_count > 0);
|
|
||||||
|
|
||||||
// Release an instance of the lock.
|
// Release an instance of the lock.
|
||||||
if ((--lock_count) == 0) {
|
if ((--m_lock_count) == 0) {
|
||||||
// Perform a memory barrier here.
|
// Perform a memory barrier here.
|
||||||
std::atomic_thread_fence(std::memory_order_seq_cst);
|
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.
|
// We're no longer going to hold the lock. Take note of what cores need scheduling.
|
||||||
const u64 cores_needing_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.
|
// Note that we no longer hold the lock, and unlock the spinlock.
|
||||||
owner_thread = nullptr;
|
m_owner_thread = nullptr;
|
||||||
spin_lock.Unlock();
|
m_spin_lock.Unlock();
|
||||||
|
|
||||||
// Enable scheduling, and perform a rescheduling operation.
|
// Enable scheduling, and perform a rescheduling operation.
|
||||||
SchedulerType::EnableScheduling(kernel, cores_needing_scheduling);
|
SchedulerType::EnableScheduling(m_kernel, cores_needing_scheduling);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
private:
|
private:
|
||||||
KernelCore& kernel;
|
friend class GlobalSchedulerContext;
|
||||||
KAlignedSpinLock spin_lock{};
|
|
||||||
s32 lock_count{};
|
KernelCore& m_kernel;
|
||||||
std::atomic<KThread*> owner_thread{};
|
KAlignedSpinLock m_spin_lock{};
|
||||||
|
s32 m_lock_count{};
|
||||||
|
std::atomic<KThread*> m_owner_thread{};
|
||||||
};
|
};
|
||||||
|
|
||||||
} // namespace Kernel
|
} // namespace Kernel
|
||||||
|
|
Loading…
Reference in a new issue