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/* ---------------------------------------------------------------------------
*
* (c) The GHC Team, 1998-2006
*
* Asynchronous exceptions
*
* --------------------------------------------------------------------------*/
#ifndef RAISEASYNC_H
#define RAISEASYNC_H
#define THROWTO_SUCCESS 0
#define THROWTO_BLOCKED 1
#ifndef CMINUSMINUS
#include "BeginPrivate.h"
void blockedThrowTo (Capability *cap,
StgTSO *target, MessageThrowTo *msg);
void throwToSingleThreaded (Capability *cap,
StgTSO *tso,
StgClosure *exception);
void throwToSingleThreaded_ (Capability *cap,
StgTSO *tso,
StgClosure *exception,
rtsBool stop_at_atomically);
void throwToSelf (Capability *cap,
StgTSO *tso,
StgClosure *exception);
void suspendComputation (Capability *cap,
StgTSO *tso,
StgUpdateFrame *stop_here);
MessageThrowTo *throwTo (Capability *cap, // the Capability we hold
StgTSO *source,
StgTSO *target,
StgClosure *exception); // the exception closure
nat throwToMsg (Capability *cap,
MessageThrowTo *msg);
int maybePerformBlockedException (Capability *cap, StgTSO *tso);
void awakenBlockedExceptionQueue (Capability *cap, StgTSO *tso);
/* Determine whether a thread is interruptible (ie. blocked
* indefinitely). Interruptible threads can be sent an exception with
* killThread# even if they have async exceptions blocked.
*/
INLINE_HEADER int
interruptible(StgTSO *t)
{
switch (t->why_blocked) {
case BlockedOnMVar:
case BlockedOnSTM:
case BlockedOnMVarRead:
case BlockedOnMsgThrowTo:
case BlockedOnRead:
case BlockedOnWrite:
#if defined(mingw32_HOST_OS)
case BlockedOnDoProc:
#endif
case BlockedOnDelay:
return 1;
// NB. Threaded blocked on foreign calls (BlockedOnCCall) are
// *not* interruptible. We can't send these threads an exception.
default:
return 0;
}
}
#include "EndPrivate.h"
#endif /* CMINUSMINUS */
#endif /* RAISEASYNC_H */
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