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Kernel/Arbiters: Implement WaitForAddress

This commit is contained in:
Michael Scire 2018-06-21 01:40:29 -06:00
parent 7e191dccc1
commit 9d71ce88ce
5 changed files with 71 additions and 6 deletions

View file

@ -5,14 +5,31 @@
#include "common/assert.h"
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "core/core.h"
#include "core/hle/kernel/errors.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/lock.h"
#include "core/memory.h"
namespace Kernel {
namespace AddressArbiter {
// Performs actual address waiting logic.
ResultCode WaitForAddress(VAddr address, s64 timeout) {
SharedPtr<Thread> current_thread = GetCurrentThread();
current_thread->arb_wait_address = address;
current_thread->arb_wait_result = RESULT_TIMEOUT;
current_thread->status = THREADSTATUS_WAIT_ARB;
current_thread->wakeup_callback = nullptr;
current_thread->WakeAfterDelay(timeout);
Core::System::GetInstance().CpuCore(current_thread->processor_id).PrepareReschedule();
return RESULT_SUCCESS;
}
// Signals an address being waited on.
ResultCode SignalToAddress(VAddr address, s32 value, s32 num_to_wake) {
// TODO
@ -33,14 +50,48 @@ namespace Kernel {
// 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) {
// TODO
return RESULT_SUCCESS;
// Ensure that we can read the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
s32 cur_value;
// Get value, decrementing if less than
{
// Decrement if less than must be an atomic operation.
std::lock_guard<std::recursive_mutex> lock(HLE::g_hle_lock);
cur_value = (s32)Memory::Read32(address);
if (cur_value < value) {
Memory::Write32(address, (u32)(cur_value - 1));
}
}
if (cur_value >= value) {
return ERR_INVALID_STATE;
}
// Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) {
return RESULT_TIMEOUT;
}
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) {
// TODO
return RESULT_SUCCESS;
// Ensure that we can read the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
// Only wait for the address if equal.
if ((s32)Memory::Read32(address) != value) {
return ERR_INVALID_STATE;
}
// Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) {
return RESULT_TIMEOUT;
}
return WaitForAddress(address, timeout);
}
} // namespace AddressArbiter
} // namespace Kernel

View file

@ -29,6 +29,7 @@ enum {
SynchronizationCanceled = 118,
TooLarge = 119,
InvalidEnumValue = 120,
InvalidState = 125,
};
}
@ -49,6 +50,7 @@ constexpr ResultCode ERR_OUT_OF_MEMORY(-1);
constexpr ResultCode ERR_INVALID_ADDRESS(ErrorModule::Kernel, ErrCodes::InvalidAddress);
constexpr ResultCode ERR_INVALID_ADDRESS_STATE(ErrorModule::Kernel, ErrCodes::InvalidMemoryState);
constexpr ResultCode ERR_INVALID_HANDLE(ErrorModule::Kernel, ErrCodes::InvalidHandle);
constexpr ResultCode ERR_INVALID_STATE(ErrorModule::Kernel, ErrCodes::InvalidState);
constexpr ResultCode ERR_INVALID_POINTER(-1);
constexpr ResultCode ERR_INVALID_OBJECT_ADDR(-1);
constexpr ResultCode ERR_NOT_AUTHORIZED(-1);

View file

@ -140,6 +140,11 @@ static void ThreadWakeupCallback(u64 thread_handle, int cycles_late) {
}
}
if (thread->arb_wait_address != 0) {
ASSERT(thread->status == THREADSTATUS_WAIT_ARB);
thread->arb_wait_address = 0;
}
if (resume)
thread->ResumeFromWait();
}
@ -179,6 +184,7 @@ void Thread::ResumeFromWait() {
case THREADSTATUS_WAIT_SLEEP:
case THREADSTATUS_WAIT_IPC:
case THREADSTATUS_WAIT_MUTEX:
case THREADSTATUS_WAIT_ARB:
break;
case THREADSTATUS_READY:

View file

@ -228,8 +228,10 @@ public:
// If waiting on a ConditionVariable, this is the ConditionVariable address
VAddr condvar_wait_address;
VAddr mutex_wait_address; ///< If waiting on a Mutex, this is the mutex address
Handle wait_handle; ///< The handle used to wait for the mutex.
VAddr mutex_wait_address; ///< If waiting on a Mutex, this is the mutex address
Handle wait_handle; ///< The handle used to wait for the mutex.
VAddr arb_wait_address; ///< If waiting for an AddressArbiter, this is the address
ResultCode arb_wait_result; ///< If waiting for an AddressArbiter, this is the result that will be returned.
std::string name;

View file

@ -213,6 +213,9 @@ QString WaitTreeThread::GetText() const {
case THREADSTATUS_WAIT_MUTEX:
status = tr("waiting for mutex");
break;
case THREADSTATUS_WAIT_MUTEX:
status = tr("waiting for address arbiter");
break;
case THREADSTATUS_DORMANT:
status = tr("dormant");
break;
@ -240,6 +243,7 @@ QColor WaitTreeThread::GetColor() const {
case THREADSTATUS_WAIT_SYNCH_ALL:
case THREADSTATUS_WAIT_SYNCH_ANY:
case THREADSTATUS_WAIT_MUTEX:
case THREADSTATUS_WAIT_ARB:
return QColor(Qt::GlobalColor::red);
case THREADSTATUS_DORMANT:
return QColor(Qt::GlobalColor::darkCyan);