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73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/* impl.h.th: THREAD MANAGER
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*
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* $HopeName$
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* Copyright (C) 1995 Harlequin Limited. All rights reserved.
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*
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* .purpose: Provides thread suspension facilities to the shield.
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* See design.mps.thread-manager. Each thread has to be
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* individually registered and deregistered with an arena.
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*/
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#ifndef th_h
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#define th_h
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#include "mpmtypes.h"
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#include "ring.h"
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#define ThreadSig ((Sig)0x519286ED) /* SIGnature THREaD */
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extern Bool ThreadCheck(Thread thread);
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/* ThreadCheckSimple
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*
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* Simple thread-safe check of a thread object.
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*/
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extern Bool ThreadCheckSimple(Thread thread);
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extern Res ThreadDescribe(Thread thread, mps_lib_FILE *stream);
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/* Register/Deregister
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*
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* Explicitly register/deregister a thread on the arena threadRing.
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* Register returns a "Thread" value which needs to be used
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* for deregistration.
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*
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* Threads must not be multiply registered in the same arena.
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*/
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extern Res ThreadRegister(Thread *threadReturn, Arena arena);
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extern void ThreadDeregister(Thread thread, Arena arena);
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/* ThreadRingSuspend/Resume
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*
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* These functions suspend/resume the threads on the ring.
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* If the current thread is among them, it is not suspended,
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* nor is any attempt to resume it made.
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*/
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extern void ThreadRingSuspend(Ring threadRing);
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extern void ThreadRingResume(Ring threadRing);
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/* ThreadRingThread
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*
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* Return the thread from an element of the Arena's
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* thread ring.
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*/
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extern Thread ThreadRingThread(Ring threadRing);
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extern Arena ThreadArena(Thread thread);
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extern Res ThreadScan(ScanState ss, Thread thread, void *stackBot);
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#endif /* th_h */
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