csp::WorkResult::Enum csp::Process::Evaluate( Host& host, int numArgs )
{
if( LuaThread().Status() != lua::Return::YIELD && LuaThread().Status() != lua::Return::OK )
return WorkResult::FINISH;
if( m_operation )
{
WorkResult::Enum result = m_operation->IsFinished()
? WorkResult::FINISH
: m_operation->Evaluate( host );
if( result == WorkResult::FINISH )
{
lua::LuaStack luaStack = m_luaThread.GetStack();
numArgs = m_operation->PushResults( luaStack );
DeleteOperation( host );
}
else
return WorkResult::YIELD;
}
WorkResult::Enum result = Resume( numArgs );
if ( result == WorkResult::YIELD && m_operation )
host.PushEvalStep( *this );
else if ( result == WorkResult::FINISH && m_parentProcess )
{
if( host.GetTopProcess() != m_parentProcess )
host.PushEvalStep( *m_parentProcess );
}
return result;
}
csp::WorkResult::Enum csp::Process::StartEvaluation( Host& host, int numArgs )
{
CORE_ASSERT( m_operation == NULL );
CORE_ASSERT( LuaThread().Status() == lua::Return::OK );
CORE_ASSERT( LuaThread().GetStack()[-numArgs-1].IsFunction() );
return Evaluate( host, numArgs );
}
csp::WorkResult::Enum csp::Process::Resume( int numArgs )
{
lua::Return::Enum retValue = LuaThread().Resume( numArgs, m_parentProcess ? &m_parentProcess->LuaThread() : NULL );
if( retValue == lua::Return::YIELD )
return WorkResult::YIELD;
return WorkResult::FINISH;
}
static LuaThread get(lua_State* l, int index)
{
lua_pushvalue(l, index);
return LuaThread(l, StackTop());
}