private ScheduleSwitch ReadScheduleSwitch(FastStream source)
{
StringBuilder sb = new StringBuilder();
// There are two formats for ScheduleSwitch serialization:
// Example1: sched:sched_switch: prev_comm=swapper/3 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=rcu_sched next_pid=8 next_prio=120
// Example2: sched:sched_switch: perf_4.9:3005 [49] S ==> swapper/2:0 [120]
// Skip "sched:sched_switch: "
source.SkipUpTo(' ');
source.SkipSpace();
// Figure out which format we have.
var pos = source.MarkPosition();
// Look for 'prev_comm' (Example1)
source.ReadFixedString(9, sb);
string nextField = sb.ToString();
sb.Clear();
if (nextField.Equals("prev_comm"))
{
// This is of the format in Example1.
source.SkipUpTo('=');
source.MoveNext();
source.ReadAsciiStringUpTo(' ', sb);
string prevComm = sb.ToString();
sb.Clear();
source.SkipUpTo('=');
source.MoveNext();
int prevTid = source.ReadInt();
source.SkipUpTo('=');
source.MoveNext();
int prevPrio = source.ReadInt();
source.SkipUpTo('=');
source.MoveNext();
char prevState = (char)source.Current;
source.MoveNext();
source.SkipUpTo('n'); // this is to bypass the ==>
source.SkipUpTo('=');
source.MoveNext();
source.ReadAsciiStringUpTo(' ', sb);
string nextComm = sb.ToString();
sb.Clear();
source.SkipUpTo('=');
source.MoveNext();
int nextTid = source.ReadInt();
source.SkipUpTo('=');
source.MoveNext();
int nextPrio = source.ReadInt();
return(new ScheduleSwitch(prevComm, prevTid, prevPrio, prevState, nextComm, nextTid, nextPrio));
}
else
{
// This is of the format in Example2.
// Restore the position back so the full text can be parsed here.
source.RestoreToMark(pos);
source.ReadAsciiStringUpTo(':', sb);
string prevComm = sb.ToString();
sb.Clear();
source.MoveNext();
int prevTid = source.ReadInt();
source.SkipUpTo('[');
source.MoveNext();
int prevPrio = source.ReadInt();
source.MoveNext();
source.SkipWhiteSpace();
char prevState = (char)source.Current;
source.SkipUpTo('>'); // this is to bypass the ==>
source.MoveNext();
source.SkipWhiteSpace();
source.ReadAsciiStringUpTo(':', sb);
string nextComm = sb.ToString();
sb.Clear();
source.MoveNext();
int nextTid = source.ReadInt();
source.SkipUpTo('[');
source.MoveNext();
int nextPrio = source.ReadInt();
return(new ScheduleSwitch(prevComm, prevTid, prevPrio, prevState, nextComm, nextTid, nextPrio));
}
}
