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author | bunnei <bunneidev@gmail.com> | 2019-03-06 21:55:56 +0100 |
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committer | GitHub <noreply@github.com> | 2019-03-06 21:55:56 +0100 |
commit | 75b417489ad3e23f62060933b0fe0f29646bbd04 (patch) | |
tree | 1b5944f3d09d3383a9c94c3fdaf2cb14c9a9a8cf /src/core/hle/kernel/address_arbiter.cpp | |
parent | Merge pull request #2201 from lioncash/audio-retval (diff) | |
parent | kernel/address_arbiter: Pass in system instance to constructor (diff) | |
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Diffstat (limited to 'src/core/hle/kernel/address_arbiter.cpp')
-rw-r--r-- | src/core/hle/kernel/address_arbiter.cpp | 147 |
1 files changed, 73 insertions, 74 deletions
diff --git a/src/core/hle/kernel/address_arbiter.cpp b/src/core/hle/kernel/address_arbiter.cpp index a250d088d..9780a7849 100644 --- a/src/core/hle/kernel/address_arbiter.cpp +++ b/src/core/hle/kernel/address_arbiter.cpp @@ -9,6 +9,7 @@ #include "common/common_types.h" #include "core/core.h" #include "core/core_cpu.h" +#include "core/hle/kernel/address_arbiter.h" #include "core/hle/kernel/errors.h" #include "core/hle/kernel/object.h" #include "core/hle/kernel/process.h" @@ -17,58 +18,16 @@ #include "core/hle/result.h" #include "core/memory.h" -namespace Kernel::AddressArbiter { - -// Performs actual address waiting logic. -static ResultCode WaitForAddress(VAddr address, s64 timeout) { - SharedPtr<Thread> current_thread = GetCurrentThread(); - current_thread->SetArbiterWaitAddress(address); - current_thread->SetStatus(ThreadStatus::WaitArb); - current_thread->InvalidateWakeupCallback(); - - current_thread->WakeAfterDelay(timeout); - - Core::System::GetInstance().CpuCore(current_thread->GetProcessorID()).PrepareReschedule(); - return RESULT_TIMEOUT; -} - -// Gets the threads waiting on an address. -static std::vector<SharedPtr<Thread>> GetThreadsWaitingOnAddress(VAddr address) { - const auto RetrieveWaitingThreads = [](std::size_t core_index, - std::vector<SharedPtr<Thread>>& waiting_threads, - VAddr arb_addr) { - const auto& scheduler = Core::System::GetInstance().Scheduler(core_index); - const auto& thread_list = scheduler.GetThreadList(); - - for (const auto& thread : thread_list) { - if (thread->GetArbiterWaitAddress() == arb_addr) - waiting_threads.push_back(thread); - } - }; - - // Retrieve all threads that are waiting for this address. - std::vector<SharedPtr<Thread>> threads; - RetrieveWaitingThreads(0, threads, address); - RetrieveWaitingThreads(1, threads, address); - RetrieveWaitingThreads(2, threads, address); - RetrieveWaitingThreads(3, threads, address); - - // Sort them by priority, such that the highest priority ones come first. - std::sort(threads.begin(), threads.end(), - [](const SharedPtr<Thread>& lhs, const SharedPtr<Thread>& rhs) { - return lhs->GetPriority() < rhs->GetPriority(); - }); - - return threads; -} - +namespace Kernel { +namespace { // Wake up num_to_wake (or all) threads in a vector. -static void WakeThreads(std::vector<SharedPtr<Thread>>& waiting_threads, s32 num_to_wake) { +void WakeThreads(const std::vector<SharedPtr<Thread>>& waiting_threads, s32 num_to_wake) { // Only process up to 'target' threads, unless 'target' is <= 0, in which case process // them all. std::size_t last = waiting_threads.size(); - if (num_to_wake > 0) + if (num_to_wake > 0) { last = num_to_wake; + } // Signal the waiting threads. for (std::size_t i = 0; i < last; i++) { @@ -78,42 +37,41 @@ static void WakeThreads(std::vector<SharedPtr<Thread>>& waiting_threads, s32 num waiting_threads[i]->ResumeFromWait(); } } +} // Anonymous namespace -// Signals an address being waited on. -ResultCode SignalToAddress(VAddr address, s32 num_to_wake) { - std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address); +AddressArbiter::AddressArbiter(Core::System& system) : system{system} {} +AddressArbiter::~AddressArbiter() = default; +ResultCode AddressArbiter::SignalToAddress(VAddr address, s32 num_to_wake) { + const std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address); WakeThreads(waiting_threads, num_to_wake); return RESULT_SUCCESS; } -// Signals an address being waited on and increments its value if equal to the value argument. -ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake) { +ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, + s32 num_to_wake) { // Ensure that we can write to the address. if (!Memory::IsValidVirtualAddress(address)) { return ERR_INVALID_ADDRESS_STATE; } - if (static_cast<s32>(Memory::Read32(address)) == value) { - Memory::Write32(address, static_cast<u32>(value + 1)); - } else { + if (static_cast<s32>(Memory::Read32(address)) != value) { return ERR_INVALID_STATE; } + Memory::Write32(address, static_cast<u32>(value + 1)); return SignalToAddress(address, num_to_wake); } -// Signals an address being waited on and modifies its value based on waiting thread count if equal -// to the value argument. -ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value, - s32 num_to_wake) { +ResultCode AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value, + s32 num_to_wake) { // Ensure that we can write to the address. if (!Memory::IsValidVirtualAddress(address)) { return ERR_INVALID_ADDRESS_STATE; } // Get threads waiting on the address. - std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address); + const std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address); // Determine the modified value depending on the waiting count. s32 updated_value; @@ -125,31 +83,31 @@ ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 valu updated_value = value; } - if (static_cast<s32>(Memory::Read32(address)) == value) { - Memory::Write32(address, static_cast<u32>(updated_value)); - } else { + if (static_cast<s32>(Memory::Read32(address)) != value) { return ERR_INVALID_STATE; } + Memory::Write32(address, static_cast<u32>(updated_value)); WakeThreads(waiting_threads, num_to_wake); return RESULT_SUCCESS; } -// Waits on an address if the value passed is less than the argument value, optionally decrementing. -ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool should_decrement) { +ResultCode AddressArbiter::WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, + bool should_decrement) { // Ensure that we can read the address. if (!Memory::IsValidVirtualAddress(address)) { return ERR_INVALID_ADDRESS_STATE; } - s32 cur_value = static_cast<s32>(Memory::Read32(address)); - if (cur_value < value) { - if (should_decrement) { - Memory::Write32(address, static_cast<u32>(cur_value - 1)); - } - } else { + const s32 cur_value = static_cast<s32>(Memory::Read32(address)); + if (cur_value >= value) { return ERR_INVALID_STATE; } + + if (should_decrement) { + Memory::Write32(address, static_cast<u32>(cur_value - 1)); + } + // Short-circuit without rescheduling, if timeout is zero. if (timeout == 0) { return RESULT_TIMEOUT; @@ -158,8 +116,7 @@ ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool return WaitForAddress(address, timeout); } -// Waits on an address if the value passed is equal to the argument value. -ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) { +ResultCode AddressArbiter::WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) { // Ensure that we can read the address. if (!Memory::IsValidVirtualAddress(address)) { return ERR_INVALID_ADDRESS_STATE; @@ -175,4 +132,46 @@ ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) { return WaitForAddress(address, timeout); } -} // namespace Kernel::AddressArbiter + +ResultCode AddressArbiter::WaitForAddress(VAddr address, s64 timeout) { + SharedPtr<Thread> current_thread = system.CurrentScheduler().GetCurrentThread(); + current_thread->SetArbiterWaitAddress(address); + current_thread->SetStatus(ThreadStatus::WaitArb); + current_thread->InvalidateWakeupCallback(); + + current_thread->WakeAfterDelay(timeout); + + system.CpuCore(current_thread->GetProcessorID()).PrepareReschedule(); + return RESULT_TIMEOUT; +} + +std::vector<SharedPtr<Thread>> AddressArbiter::GetThreadsWaitingOnAddress(VAddr address) const { + const auto RetrieveWaitingThreads = [this](std::size_t core_index, + std::vector<SharedPtr<Thread>>& waiting_threads, + VAddr arb_addr) { + const auto& scheduler = system.Scheduler(core_index); + const auto& thread_list = scheduler.GetThreadList(); + + for (const auto& thread : thread_list) { + if (thread->GetArbiterWaitAddress() == arb_addr) { + waiting_threads.push_back(thread); + } + } + }; + + // Retrieve all threads that are waiting for this address. + std::vector<SharedPtr<Thread>> threads; + RetrieveWaitingThreads(0, threads, address); + RetrieveWaitingThreads(1, threads, address); + RetrieveWaitingThreads(2, threads, address); + RetrieveWaitingThreads(3, threads, address); + + // Sort them by priority, such that the highest priority ones come first. + std::sort(threads.begin(), threads.end(), + [](const SharedPtr<Thread>& lhs, const SharedPtr<Thread>& rhs) { + return lhs->GetPriority() < rhs->GetPriority(); + }); + + return threads; +} +} // namespace Kernel |