mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-16 01:49:32 +00:00
185 lines
8.1 KiB
C++
185 lines
8.1 KiB
C++
/*
|
|
* Copyright (c) Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#pragma once
|
|
#include <stratosphere.hpp>
|
|
|
|
#if defined(ATMOSPHERE_OS_HORIZON)
|
|
#include "os_rw_lock_target_impl.os.horizon.hpp"
|
|
#else
|
|
#error "Unknown OS for os::ReaderWriterLockTargetImpl"
|
|
#endif
|
|
|
|
namespace ams::os::impl {
|
|
|
|
static_assert(alignof(ReaderWriterLockType) == sizeof(u64) || alignof(ReaderWriterLockType) == sizeof(u32));
|
|
constexpr inline bool IsReaderWriterLockGuaranteedAlignment = alignof(ReaderWriterLockType) == sizeof(u64);
|
|
|
|
struct ReaderWriterLockCounter {
|
|
using ReadLockCount = util::BitPack32::Field< 0, BITSIZEOF(u16) - 1, u32>;
|
|
using WriteLocked = util::BitPack32::Field< ReadLockCount::Next, 1, u32>;
|
|
using ReadLockWaiterCount = util::BitPack32::Field< WriteLocked::Next, BITSIZEOF(u8), u32>;
|
|
using WriteLockWaiterCount = util::BitPack32::Field<ReadLockWaiterCount::Next, BITSIZEOF(u8), u32>;
|
|
};
|
|
static_assert(ReaderWriterLockCounter::WriteLockWaiterCount::Next == BITSIZEOF(u32));
|
|
|
|
ALWAYS_INLINE void ClearReadLockCount(ReaderWriterLockType::LockCount &lc) {
|
|
lc.counter.Set<ReaderWriterLockCounter::ReadLockCount>(0);
|
|
}
|
|
|
|
ALWAYS_INLINE void ClearWriteLocked(ReaderWriterLockType::LockCount &lc) {
|
|
lc.counter.Set<ReaderWriterLockCounter::WriteLocked>(0);
|
|
}
|
|
|
|
ALWAYS_INLINE void ClearReadLockWaiterCount(ReaderWriterLockType::LockCount &lc) {
|
|
lc.counter.Set<ReaderWriterLockCounter::ReadLockWaiterCount>(0);
|
|
}
|
|
|
|
ALWAYS_INLINE void ClearWriteLockWaiterCount(ReaderWriterLockType::LockCount &lc) {
|
|
lc.counter.Set<ReaderWriterLockCounter::WriteLockWaiterCount>(0);
|
|
}
|
|
|
|
ALWAYS_INLINE void ClearWriteLockCount(ReaderWriterLockType *rw_lock) {
|
|
if constexpr (IsReaderWriterLockGuaranteedAlignment) {
|
|
rw_lock->lock_count.aligned.write_lock_count = 0;
|
|
} else {
|
|
if (reinterpret_cast<uintptr_t>(std::addressof(rw_lock->lock_count)) & sizeof(u32)) {
|
|
rw_lock->lock_count.not_aligned.write_lock_count = 0;
|
|
} else {
|
|
rw_lock->lock_count.aligned.write_lock_count = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
ALWAYS_INLINE ReaderWriterLockType::LockCount &GetLockCount(ReaderWriterLockType *rw_lock) {
|
|
if constexpr (IsReaderWriterLockGuaranteedAlignment) {
|
|
return rw_lock->lock_count.aligned.c;
|
|
} else {
|
|
if (reinterpret_cast<uintptr_t>(std::addressof(rw_lock->lock_count)) & sizeof(u32)) {
|
|
return rw_lock->lock_count.not_aligned.c;
|
|
} else {
|
|
return rw_lock->lock_count.aligned.c;
|
|
}
|
|
}
|
|
}
|
|
|
|
ALWAYS_INLINE const ReaderWriterLockType::LockCount &GetLockCount(const ReaderWriterLockType *rw_lock) {
|
|
if constexpr (IsReaderWriterLockGuaranteedAlignment) {
|
|
return rw_lock->lock_count.aligned.c;
|
|
} else {
|
|
if (reinterpret_cast<uintptr_t>(std::addressof(rw_lock->lock_count)) & sizeof(u32)) {
|
|
return rw_lock->lock_count.not_aligned.c;
|
|
} else {
|
|
return rw_lock->lock_count.aligned.c;
|
|
}
|
|
}
|
|
}
|
|
|
|
ALWAYS_INLINE u32 GetReadLockCount(const ReaderWriterLockType::LockCount &lc) {
|
|
return lc.counter.Get<ReaderWriterLockCounter::ReadLockCount>();
|
|
}
|
|
|
|
ALWAYS_INLINE u32 GetWriteLocked(const ReaderWriterLockType::LockCount &lc) {
|
|
return lc.counter.Get<ReaderWriterLockCounter::WriteLocked>();
|
|
}
|
|
|
|
ALWAYS_INLINE u32 GetReadLockWaiterCount(const ReaderWriterLockType::LockCount &lc) {
|
|
return lc.counter.Get<ReaderWriterLockCounter::ReadLockWaiterCount>();
|
|
}
|
|
|
|
ALWAYS_INLINE u32 GetWriteLockWaiterCount(const ReaderWriterLockType::LockCount &lc) {
|
|
return lc.counter.Get<ReaderWriterLockCounter::WriteLockWaiterCount>();
|
|
}
|
|
|
|
ALWAYS_INLINE u32 &GetWriteLockCount(ReaderWriterLockType &rw_lock) {
|
|
if constexpr (IsReaderWriterLockGuaranteedAlignment) {
|
|
return rw_lock.lock_count.aligned.write_lock_count;
|
|
} else {
|
|
if (reinterpret_cast<uintptr_t>(std::addressof(rw_lock.lock_count)) & sizeof(u32)) {
|
|
return rw_lock.lock_count.not_aligned.write_lock_count;
|
|
} else {
|
|
return rw_lock.lock_count.aligned.write_lock_count;
|
|
}
|
|
}
|
|
}
|
|
|
|
ALWAYS_INLINE const u32 &GetWriteLockCount(const ReaderWriterLockType &rw_lock) {
|
|
if constexpr (IsReaderWriterLockGuaranteedAlignment) {
|
|
return rw_lock.lock_count.aligned.write_lock_count;
|
|
} else {
|
|
if (reinterpret_cast<uintptr_t>(std::addressof(rw_lock.lock_count)) & sizeof(u32)) {
|
|
return rw_lock.lock_count.not_aligned.write_lock_count;
|
|
} else {
|
|
return rw_lock.lock_count.aligned.write_lock_count;
|
|
}
|
|
}
|
|
}
|
|
|
|
ALWAYS_INLINE void IncReadLockCount(ReaderWriterLockType::LockCount &lc) {
|
|
const u32 read_lock_count = lc.counter.Get<ReaderWriterLockCounter::ReadLockCount>();
|
|
AMS_ASSERT(read_lock_count < ReaderWriterLockCountMax);
|
|
lc.counter.Set<ReaderWriterLockCounter::ReadLockCount>(read_lock_count + 1);
|
|
}
|
|
|
|
ALWAYS_INLINE void DecReadLockCount(ReaderWriterLockType::LockCount &lc) {
|
|
const u32 read_lock_count = lc.counter.Get<ReaderWriterLockCounter::ReadLockCount>();
|
|
AMS_ASSERT(read_lock_count > 0);
|
|
lc.counter.Set<ReaderWriterLockCounter::ReadLockCount>(read_lock_count - 1);
|
|
}
|
|
|
|
ALWAYS_INLINE void IncReadLockWaiterCount(ReaderWriterLockType::LockCount &lc) {
|
|
const u32 read_lock_waiter_count = lc.counter.Get<ReaderWriterLockCounter::ReadLockWaiterCount>();
|
|
AMS_ASSERT(read_lock_waiter_count < ReaderWriterLockWaiterCountMax);
|
|
lc.counter.Set<ReaderWriterLockCounter::ReadLockWaiterCount>(read_lock_waiter_count + 1);
|
|
}
|
|
|
|
ALWAYS_INLINE void DecReadLockWaiterCount(ReaderWriterLockType::LockCount &lc) {
|
|
const u32 read_lock_waiter_count = lc.counter.Get<ReaderWriterLockCounter::ReadLockWaiterCount>();
|
|
AMS_ASSERT(read_lock_waiter_count > 0);
|
|
lc.counter.Set<ReaderWriterLockCounter::ReadLockWaiterCount>(read_lock_waiter_count - 1);
|
|
}
|
|
|
|
ALWAYS_INLINE void IncWriteLockWaiterCount(ReaderWriterLockType::LockCount &lc) {
|
|
const u32 write_lock_waiter_count = lc.counter.Get<ReaderWriterLockCounter::WriteLockWaiterCount>();
|
|
AMS_ASSERT(write_lock_waiter_count < ReaderWriterLockWaiterCountMax);
|
|
lc.counter.Set<ReaderWriterLockCounter::WriteLockWaiterCount>(write_lock_waiter_count + 1);
|
|
}
|
|
|
|
ALWAYS_INLINE void DecWriteLockWaiterCount(ReaderWriterLockType::LockCount &lc) {
|
|
const u32 write_lock_waiter_count = lc.counter.Get<ReaderWriterLockCounter::WriteLockWaiterCount>();
|
|
AMS_ASSERT(write_lock_waiter_count > 0);
|
|
lc.counter.Set<ReaderWriterLockCounter::WriteLockWaiterCount>(write_lock_waiter_count - 1);
|
|
}
|
|
|
|
|
|
ALWAYS_INLINE void IncWriteLockCount(ReaderWriterLockType &rw_lock) {
|
|
u32 &write_lock_count = GetWriteLockCount(rw_lock);
|
|
AMS_ASSERT(write_lock_count < ReaderWriterLockCountMax);
|
|
++write_lock_count;
|
|
}
|
|
|
|
ALWAYS_INLINE void DecWriteLockCount(ReaderWriterLockType &rw_lock) {
|
|
u32 &write_lock_count = GetWriteLockCount(rw_lock);
|
|
AMS_ASSERT(write_lock_count > 0);
|
|
--write_lock_count;
|
|
}
|
|
|
|
ALWAYS_INLINE void SetWriteLocked(ReaderWriterLockType::LockCount &lc) {
|
|
lc.counter.Set<ReaderWriterLockCounter::WriteLocked>(1);
|
|
}
|
|
|
|
using ReaderWriterLockImpl = ReaderWriterLockTargetImpl;
|
|
|
|
}
|