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traceToggler.h
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traceToggler.h
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#include "trace-projections.h"
#include "converse.h"
#ifndef TRACE_TOGGLER_H
#define TRACE_TOGGLER_H
// A converse msg to announce trace toggling
struct traceCmd
{
char hdr[CmiMsgHeaderSizeBytes];
bool isTracingNeeded;
};
// Fwd declaration
void traceCmdHandler(void *hdr);
/// A collection of routines that toggle projections tracing globally across the whole system
class traceToggler
{
public:
/// Converse msg handler that obeys an incoming trace cmd
friend void traceCmdHandler(void *hdr)
{
traceCmd *cmd = (traceCmd*) hdr;
#if defined(LU_TRACING)
if (cmd->isTracingNeeded)
traceBegin();
else
traceEnd();
#endif
CmiFree(cmd);
}
/// initproc. Register a converse handler to accept the trace cmds
static void registerHandler()
{
traceCmdHandlerID = CmiRegisterHandler(traceCmdHandler);
}
/// Start projections tracing on this PE
inline static void start()
{
traceCmd *msg = (traceCmd*) CmiAlloc(sizeof(traceCmd));
msg->isTracingNeeded = true;
CmiSetHandler(msg, traceCmdHandlerID);
CmiSyncBroadcastAllAndFree(sizeof(traceCmd), (char*)msg);
}
/// Stop projections tracing on this PE
inline static void stop()
{
traceCmd *msg = (traceCmd*) CmiAlloc(sizeof(traceCmd));
msg->isTracingNeeded = false;
CmiSetHandler(msg, traceCmdHandlerID);
CmiSyncBroadcastAllAndFree(sizeof(traceCmd), (char*)msg);
}
private:
static int traceCmdHandlerID;
};
#endif // TRACE_TOGGLER_H