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//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "ProfilingStateMachine.hpp"
#include <common/include/ProfilingException.hpp>
#include <sstream>
namespace arm
{
namespace pipe
{
namespace
{
void ThrowStateTransitionException(ProfilingState expectedState, ProfilingState newState)
{
std::stringstream ss;
ss << "Cannot transition from state [" << GetProfilingStateName(expectedState) << "] "
<< "to state [" << GetProfilingStateName(newState) << "]";
throw arm::pipe::ProfilingException(ss.str());
}
} // Anonymous namespace
ProfilingState ProfilingStateMachine::GetCurrentState() const
{
return m_State.load();
}
void ProfilingStateMachine::TransitionToState(ProfilingState newState)
{
ProfilingState currentState = m_State.load(std::memory_order::memory_order_relaxed);
switch (newState)
{
case ProfilingState::Uninitialised:
do
{
if (!IsOneOfStates(currentState, ProfilingState::Uninitialised))
{
ThrowStateTransitionException(currentState, newState);
}
}
while (!m_State.compare_exchange_strong(currentState, newState, std::memory_order::memory_order_relaxed));
break;
case ProfilingState::NotConnected:
do
{
if (!IsOneOfStates(currentState, ProfilingState::Uninitialised, ProfilingState::NotConnected,
ProfilingState::Active, ProfilingState::WaitingForAck))
{
ThrowStateTransitionException(currentState, newState);
}
}
while (!m_State.compare_exchange_strong(currentState, newState, std::memory_order::memory_order_relaxed));
break;
case ProfilingState::WaitingForAck:
do
{
if (!IsOneOfStates(currentState, ProfilingState::NotConnected, ProfilingState::WaitingForAck))
{
ThrowStateTransitionException(currentState, newState);
}
}
while (!m_State.compare_exchange_strong(currentState, newState, std::memory_order::memory_order_relaxed));
break;
case ProfilingState::Active:
do
{
if (!IsOneOfStates(currentState, ProfilingState::WaitingForAck, ProfilingState::Active))
{
ThrowStateTransitionException(currentState, newState);
}
}
while (!m_State.compare_exchange_strong(currentState, newState, std::memory_order::memory_order_relaxed));
break;
default:
break;
}
}
void ProfilingStateMachine::Reset()
{
m_State.store(ProfilingState::Uninitialised);
}
} // namespace pipe
} // namespace arm
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