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Kernel/Arbiters: Implement WaitForAddress
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7e191dccc1
commit
9d71ce88ce
5 changed files with 71 additions and 6 deletions
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@ -5,14 +5,31 @@
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#include "common/assert.h"
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#include "common/common_funcs.h"
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#include "common/common_types.h"
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#include "core/core.h"
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#include "core/hle/kernel/errors.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/process.h"
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#include "core/hle/kernel/thread.h"
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#include "core/hle/lock.h"
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#include "core/memory.h"
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namespace Kernel {
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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->arb_wait_result = RESULT_TIMEOUT;
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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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Core::System::GetInstance().CpuCore(current_thread->processor_id).PrepareReschedule();
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return RESULT_SUCCESS;
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}
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// Signals an address being waited on.
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ResultCode SignalToAddress(VAddr address, s32 value, s32 num_to_wake) {
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// TODO
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@ -33,14 +50,48 @@ namespace Kernel {
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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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// TODO
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return RESULT_SUCCESS;
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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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s32 cur_value;
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// Get value, decrementing if less than
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{
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// Decrement if less than must be an atomic operation.
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std::lock_guard<std::recursive_mutex> lock(HLE::g_hle_lock);
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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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}
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}
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if (cur_value >= 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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// 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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// TODO
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return RESULT_SUCCESS;
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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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@ -29,6 +29,7 @@ enum {
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SynchronizationCanceled = 118,
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TooLarge = 119,
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InvalidEnumValue = 120,
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InvalidState = 125,
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};
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}
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@ -49,6 +50,7 @@ constexpr ResultCode ERR_OUT_OF_MEMORY(-1);
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constexpr ResultCode ERR_INVALID_ADDRESS(ErrorModule::Kernel, ErrCodes::InvalidAddress);
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constexpr ResultCode ERR_INVALID_ADDRESS_STATE(ErrorModule::Kernel, ErrCodes::InvalidMemoryState);
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constexpr ResultCode ERR_INVALID_HANDLE(ErrorModule::Kernel, ErrCodes::InvalidHandle);
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constexpr ResultCode ERR_INVALID_STATE(ErrorModule::Kernel, ErrCodes::InvalidState);
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constexpr ResultCode ERR_INVALID_POINTER(-1);
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constexpr ResultCode ERR_INVALID_OBJECT_ADDR(-1);
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constexpr ResultCode ERR_NOT_AUTHORIZED(-1);
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@ -140,6 +140,11 @@ static void ThreadWakeupCallback(u64 thread_handle, int cycles_late) {
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}
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}
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if (thread->arb_wait_address != 0) {
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ASSERT(thread->status == THREADSTATUS_WAIT_ARB);
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thread->arb_wait_address = 0;
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}
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if (resume)
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thread->ResumeFromWait();
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}
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@ -179,6 +184,7 @@ void Thread::ResumeFromWait() {
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case THREADSTATUS_WAIT_SLEEP:
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case THREADSTATUS_WAIT_IPC:
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case THREADSTATUS_WAIT_MUTEX:
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case THREADSTATUS_WAIT_ARB:
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break;
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case THREADSTATUS_READY:
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@ -228,8 +228,10 @@ 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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VAddr arb_wait_address; ///< If waiting for an AddressArbiter, this is the address
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ResultCode arb_wait_result; ///< If waiting for an AddressArbiter, this is the result that will be returned.
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std::string name;
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@ -213,6 +213,9 @@ QString WaitTreeThread::GetText() const {
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case THREADSTATUS_WAIT_MUTEX:
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status = tr("waiting for mutex");
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break;
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case THREADSTATUS_WAIT_MUTEX:
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status = tr("waiting for address arbiter");
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break;
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case THREADSTATUS_DORMANT:
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status = tr("dormant");
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break;
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@ -240,6 +243,7 @@ QColor WaitTreeThread::GetColor() const {
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case THREADSTATUS_WAIT_SYNCH_ALL:
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case THREADSTATUS_WAIT_SYNCH_ANY:
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case THREADSTATUS_WAIT_MUTEX:
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case THREADSTATUS_WAIT_ARB:
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return QColor(Qt::GlobalColor::red);
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case THREADSTATUS_DORMANT:
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return QColor(Qt::GlobalColor::darkCyan);
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