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Diffstat (limited to 'profiling/client/src/ProfilingStateMachine.cpp')
-rw-r--r-- | profiling/client/src/ProfilingStateMachine.cpp | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/profiling/client/src/ProfilingStateMachine.cpp b/profiling/client/src/ProfilingStateMachine.cpp new file mode 100644 index 0000000000..e002c052b9 --- /dev/null +++ b/profiling/client/src/ProfilingStateMachine.cpp @@ -0,0 +1,95 @@ +// +// 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 |