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Run clang-format on PR.
This commit is contained in:
Michael Scire
parent
dc70a87af1
commit
08d454e30d
@ -14,160 +14,161 @@
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#include "core/memory.h"
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namespace Kernel {
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namespace AddressArbiter {
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namespace AddressArbiter {
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// Performs actual address waiting logic.
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ResultCode WaitForAddress(VAddr address, s64 timeout) {
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SharedPtr<Thread> current_thread = GetCurrentThread();
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current_thread->arb_wait_address = address;
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current_thread->status = THREADSTATUS_WAIT_ARB;
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current_thread->wakeup_callback = nullptr;
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// Performs actual address waiting logic.
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ResultCode WaitForAddress(VAddr address, s64 timeout) {
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SharedPtr<Thread> current_thread = GetCurrentThread();
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current_thread->arb_wait_address = address;
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current_thread->status = THREADSTATUS_WAIT_ARB;
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current_thread->wakeup_callback = nullptr;
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current_thread->WakeAfterDelay(timeout);
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current_thread->WakeAfterDelay(timeout);
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Core::System::GetInstance().CpuCore(current_thread->processor_id).PrepareReschedule();
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// This should never actually execute.
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return RESULT_SUCCESS;
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}
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Core::System::GetInstance().CpuCore(current_thread->processor_id).PrepareReschedule();
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// This should never actually execute.
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return RESULT_SUCCESS;
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}
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// Gets the threads waiting on an address.
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void GetThreadsWaitingOnAddress(std::vector<SharedPtr<Thread>> &waiting_threads, VAddr address) {
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auto RetrieveWaitingThreads =
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[](size_t core_index, std::vector<SharedPtr<Thread>>& waiting_threads, VAddr arb_addr) {
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const auto& scheduler = Core::System::GetInstance().Scheduler(core_index);
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auto& thread_list = scheduler->GetThreadList();
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// Gets the threads waiting on an address.
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void GetThreadsWaitingOnAddress(std::vector<SharedPtr<Thread>>& waiting_threads, VAddr address) {
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auto RetrieveWaitingThreads =
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[](size_t core_index, std::vector<SharedPtr<Thread>>& waiting_threads, VAddr arb_addr) {
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const auto& scheduler = Core::System::GetInstance().Scheduler(core_index);
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auto& thread_list = scheduler->GetThreadList();
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for (auto& thread : thread_list) {
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if (thread->arb_wait_address == arb_addr)
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waiting_threads.push_back(thread);
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}
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};
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// Retrieve a list of all threads that are waiting for this address.
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RetrieveWaitingThreads(0, waiting_threads, address);
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RetrieveWaitingThreads(1, waiting_threads, address);
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RetrieveWaitingThreads(2, waiting_threads, address);
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RetrieveWaitingThreads(3, waiting_threads, address);
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// Sort them by priority, such that the highest priority ones come first.
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std::sort(waiting_threads.begin(), waiting_threads.end(),
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[](const SharedPtr<Thread>& lhs, const SharedPtr<Thread>& rhs) {
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return lhs->current_priority < rhs->current_priority;
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});
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}
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// Wake up num_to_wake (or all) threads in a vector.
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void WakeThreads(std::vector<SharedPtr<Thread>> &waiting_threads, s32 num_to_wake) {
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// Only process up to 'target' threads, unless 'target' is <= 0, in which case process
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// them all.
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size_t last = waiting_threads.size();
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if (num_to_wake > 0)
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last = num_to_wake;
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// Signal the waiting threads.
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// TODO: Rescheduling should not occur while waking threads. How can it be prevented?
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for (size_t i = 0; i < last; i++) {
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ASSERT(waiting_threads[i]->status = THREADSTATUS_WAIT_ARB);
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waiting_threads[i]->SetWaitSynchronizationResult(RESULT_SUCCESS);
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waiting_threads[i]->arb_wait_address = 0;
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waiting_threads[i]->ResumeFromWait();
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for (auto& thread : thread_list) {
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if (thread->arb_wait_address == arb_addr)
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waiting_threads.push_back(thread);
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}
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};
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}
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// Retrieve a list of all threads that are waiting for this address.
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RetrieveWaitingThreads(0, waiting_threads, address);
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RetrieveWaitingThreads(1, waiting_threads, address);
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RetrieveWaitingThreads(2, waiting_threads, address);
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RetrieveWaitingThreads(3, waiting_threads, address);
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// Sort them by priority, such that the highest priority ones come first.
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std::sort(waiting_threads.begin(), waiting_threads.end(),
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[](const SharedPtr<Thread>& lhs, const SharedPtr<Thread>& rhs) {
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return lhs->current_priority < rhs->current_priority;
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});
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}
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// Signals an address being waited on.
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ResultCode SignalToAddress(VAddr address, s32 num_to_wake) {
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// Get threads waiting on the address.
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std::vector<SharedPtr<Thread>> waiting_threads;
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GetThreadsWaitingOnAddress(waiting_threads, address);
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// Wake up num_to_wake (or all) threads in a vector.
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void WakeThreads(std::vector<SharedPtr<Thread>>& waiting_threads, s32 num_to_wake) {
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// Only process up to 'target' threads, unless 'target' is <= 0, in which case process
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// them all.
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size_t last = waiting_threads.size();
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if (num_to_wake > 0)
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last = num_to_wake;
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WakeThreads(waiting_threads, num_to_wake);
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return RESULT_SUCCESS;
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}
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// Signal the waiting threads.
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// TODO: Rescheduling should not occur while waking threads. How can it be prevented?
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for (size_t i = 0; i < last; i++) {
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ASSERT(waiting_threads[i]->status = THREADSTATUS_WAIT_ARB);
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waiting_threads[i]->SetWaitSynchronizationResult(RESULT_SUCCESS);
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waiting_threads[i]->arb_wait_address = 0;
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waiting_threads[i]->ResumeFromWait();
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}
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}
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// Signals an address being waited on and increments its value if equal to the value argument.
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ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake) {
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// Ensure that we can write to the address.
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if (!Memory::IsValidVirtualAddress(address)) {
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return ERR_INVALID_ADDRESS_STATE;
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}
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// Signals an address being waited on.
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ResultCode SignalToAddress(VAddr address, s32 num_to_wake) {
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// Get threads waiting on the address.
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std::vector<SharedPtr<Thread>> waiting_threads;
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GetThreadsWaitingOnAddress(waiting_threads, address);
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if ((s32)Memory::Read32(address) == value) {
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Memory::Write32(address, (u32)(value + 1));
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} else {
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return ERR_INVALID_STATE;
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}
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WakeThreads(waiting_threads, num_to_wake);
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return RESULT_SUCCESS;
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}
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return SignalToAddress(address, num_to_wake);
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}
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// Signals an address being waited on and increments its value if equal to the value argument.
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ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake) {
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// Ensure that we can write to the address.
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if (!Memory::IsValidVirtualAddress(address)) {
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return ERR_INVALID_ADDRESS_STATE;
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}
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// Signals an address being waited on and modifies its value based on waiting thread count if equal to the value argument.
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ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake) {
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// Ensure that we can write to the address.
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if (!Memory::IsValidVirtualAddress(address)) {
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return ERR_INVALID_ADDRESS_STATE;
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}
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if ((s32)Memory::Read32(address) == value) {
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Memory::Write32(address, (u32)(value + 1));
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} else {
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return ERR_INVALID_STATE;
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}
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// Get threads waiting on the address.
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std::vector<SharedPtr<Thread>> waiting_threads;
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GetThreadsWaitingOnAddress(waiting_threads, address);
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return SignalToAddress(address, num_to_wake);
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}
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// Determine the modified value depending on the waiting count.
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s32 updated_value;
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if (waiting_threads.size() == 0) {
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updated_value = value - 1;
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} else if (num_to_wake <= 0 || waiting_threads.size() <= num_to_wake) {
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updated_value = value + 1;
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} else {
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updated_value = value;
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}
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// Signals an address being waited on and modifies its value based on waiting thread count if equal
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// to the value argument.
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ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
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s32 num_to_wake) {
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// Ensure that we can write to the address.
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if (!Memory::IsValidVirtualAddress(address)) {
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return ERR_INVALID_ADDRESS_STATE;
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}
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if ((s32)Memory::Read32(address) == value) {
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Memory::Write32(address, (u32)(updated_value));
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} else {
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return ERR_INVALID_STATE;
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}
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// Get threads waiting on the address.
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std::vector<SharedPtr<Thread>> waiting_threads;
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GetThreadsWaitingOnAddress(waiting_threads, address);
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WakeThreads(waiting_threads, num_to_wake);
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return RESULT_SUCCESS;
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}
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// Determine the modified value depending on the waiting count.
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s32 updated_value;
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if (waiting_threads.size() == 0) {
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updated_value = value - 1;
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} else if (num_to_wake <= 0 || waiting_threads.size() <= num_to_wake) {
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updated_value = value + 1;
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} else {
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updated_value = value;
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}
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// Waits on an address if the value passed is less than the argument value, optionally decrementing.
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ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool should_decrement) {
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// Ensure that we can read the address.
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if (!Memory::IsValidVirtualAddress(address)) {
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return ERR_INVALID_ADDRESS_STATE;
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}
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if ((s32)Memory::Read32(address) == value) {
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Memory::Write32(address, (u32)(updated_value));
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} else {
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return ERR_INVALID_STATE;
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}
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s32 cur_value = (s32)Memory::Read32(address);
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if (cur_value < value) {
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Memory::Write32(address, (u32)(cur_value - 1));
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} else {
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return ERR_INVALID_STATE;
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}
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// Short-circuit without rescheduling, if timeout is zero.
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if (timeout == 0) {
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return RESULT_TIMEOUT;
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}
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WakeThreads(waiting_threads, num_to_wake);
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return RESULT_SUCCESS;
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}
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return WaitForAddress(address, timeout);
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}
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// Waits on an address if the value passed is less than the argument value, optionally decrementing.
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ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool should_decrement) {
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// Ensure that we can read the address.
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if (!Memory::IsValidVirtualAddress(address)) {
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return ERR_INVALID_ADDRESS_STATE;
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}
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// Waits on an address if the value passed is equal to the argument value.
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ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) {
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// Ensure that we can read the address.
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if (!Memory::IsValidVirtualAddress(address)) {
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return ERR_INVALID_ADDRESS_STATE;
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}
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// Only wait for the address if equal.
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if ((s32)Memory::Read32(address) != value) {
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return ERR_INVALID_STATE;
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}
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// Short-circuit without rescheduling, if timeout is zero.
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if (timeout == 0) {
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return RESULT_TIMEOUT;
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}
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s32 cur_value = (s32)Memory::Read32(address);
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if (cur_value < value) {
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Memory::Write32(address, (u32)(cur_value - 1));
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} else {
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return ERR_INVALID_STATE;
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}
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// Short-circuit without rescheduling, if timeout is zero.
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if (timeout == 0) {
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return RESULT_TIMEOUT;
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}
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return WaitForAddress(address, timeout);
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}
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} // namespace AddressArbiter
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} // namespace Kernel
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return WaitForAddress(address, timeout);
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}
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// Waits on an address if the value passed is equal to the argument value.
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ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) {
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// Ensure that we can read the address.
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if (!Memory::IsValidVirtualAddress(address)) {
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return ERR_INVALID_ADDRESS_STATE;
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}
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// Only wait for the address if equal.
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if ((s32)Memory::Read32(address) != value) {
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return ERR_INVALID_STATE;
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}
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// Short-circuit without rescheduling, if timeout is zero.
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if (timeout == 0) {
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return RESULT_TIMEOUT;
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}
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return WaitForAddress(address, timeout);
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}
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} // namespace AddressArbiter
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} // namespace Kernel
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@ -8,25 +8,25 @@
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namespace Kernel {
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namespace AddressArbiter {
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enum class ArbitrationType {
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WaitIfLessThan = 0,
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DecrementAndWaitIfLessThan = 1,
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WaitIfEqual = 2,
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};
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namespace AddressArbiter {
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enum class ArbitrationType {
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WaitIfLessThan = 0,
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DecrementAndWaitIfLessThan = 1,
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WaitIfEqual = 2,
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};
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enum class SignalType {
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Signal = 0,
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IncrementAndSignalIfEqual = 1,
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ModifyByWaitingCountAndSignalIfEqual = 2,
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};
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enum class SignalType {
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Signal = 0,
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IncrementAndSignalIfEqual = 1,
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ModifyByWaitingCountAndSignalIfEqual = 2,
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};
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ResultCode SignalToAddress(VAddr address, s32 num_to_wake);
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ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
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ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
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ResultCode SignalToAddress(VAddr address, s32 num_to_wake);
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ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
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ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
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ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool should_decrement);
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ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout);
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} // namespace AddressArbiter
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ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool should_decrement);
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ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout);
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} // namespace AddressArbiter
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} // namespace Kernel
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} // namespace Kernel
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@ -228,8 +228,8 @@ public:
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// If waiting on a ConditionVariable, this is the ConditionVariable address
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VAddr condvar_wait_address;
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VAddr mutex_wait_address; ///< If waiting on a Mutex, this is the mutex address
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Handle wait_handle; ///< The handle used to wait for the mutex.
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VAddr mutex_wait_address; ///< If waiting on a Mutex, this is the mutex address
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Handle wait_handle; ///< The handle used to wait for the mutex.
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// If waiting for an AddressArbiter, this is the address being waited on.
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VAddr arb_wait_address{0};
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