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/* -----------------------------------------------------------------------------
* $Id: SchedAPI.h,v 1.3 1999/05/21 14:46:21 sof Exp $
*
* (c) The GHC Team 1998
*
* External API for the scheduler. For most uses, the functions in
* RtsAPI.h should be enough.
*
* ---------------------------------------------------------------------------*/
#ifndef SCHEDAPI_H
#define SCHEDAPI_H
/*
* Running the scheduler
*/
typedef enum {
Success,
Killed, /* another thread killed us */
Interrupted, /* stopped in response to a call to interruptStgRts */
Deadlock,
AllBlocked, /* subtly different from Deadlock */
} SchedulerStatus;
SchedulerStatus schedule(StgTSO *main_thread, /*out*/StgClosure **ret);
/*
* Creating threads
*/
StgTSO *createThread (nat stack_size);
static inline void pushClosure (StgTSO *tso, StgClosure *c) {
tso->sp--;
tso->sp[0] = (W_) c;
}
static inline void pushRealWorld (StgTSO *tso) {
tso->sp--;
tso->sp[0] = (W_) REALWORLD_TAG;
}
static inline StgTSO *
createGenThread(nat stack_size, StgClosure *closure) {
StgTSO *t;
t = createThread(stack_size);
pushClosure(t,closure);
return t;
}
static inline StgTSO *
createIOThread(nat stack_size, StgClosure *closure) {
StgTSO *t;
t = createThread(stack_size);
pushRealWorld(t);
pushClosure(t,closure);
return t;
}
/*
* Same as above, but also evaluate the result of the IO action
* to whnf while we're at it.
*/
static inline StgTSO *
createStrictIOThread(nat stack_size, StgClosure *closure) {
StgTSO *t;
t = createThread(stack_size);
pushClosure(t,closure);
pushClosure(t,&forceIO_closure);
return t;
}
/*
* Killing threads
*/
void deleteThread(StgTSO *tso);
/*
* Reverting CAFs
*/
void RevertCAFs(void);
#endif
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