/* -----------------------------------------------------------------------------
- * $Id: Schedule.h,v 1.37 2003/01/25 15:54:50 wolfgang Exp $
+ * $Id: Schedule.h,v 1.45 2004/03/01 14:18:36 simonmar Exp $
*
* (c) The GHC Team 1998-1999
*
#elif defined(PAR)
void awakenBlockedQueue(StgBlockingQueueElement *q, StgClosure *node);
#else
-void awakenBlockedQueue(StgTSO *tso);
-#if defined(RTS_SUPPORTS_THREADS)
-void awakenBlockedQueueNoLock(StgTSO *tso);
-#endif
+void awakenBlockedQueue (StgTSO *tso);
+void awakenBlockedQueueNoLock (StgTSO *tso);
#endif
/* unblockOne()
*/
void wakeBlockedWorkerThread(void); /* In Select.c */
+/* resetWorkerWakeupPipeAfterFork()
+ *
+ * Notify Select.c that a fork() has occured
+ *
+ * Called from STG : NO
+ * Locks assumed : don't care, but must be called right after fork()
+ */
+void resetWorkerWakeupPipeAfterFork(void); /* In Select.c */
/* GetRoots(evac_fn f)
*
#if defined(RTS_SUPPORTS_THREADS)
/* Schedule.c has detailed info on what these do */
extern Mutex sched_mutex;
-extern Condition thread_ready_cond;
extern Condition returning_worker_cond;
extern nat rts_n_waiting_workers;
extern nat rts_n_waiting_tasks;
#endif
-StgInt forkProcess(StgTSO *tso);
+StgBool rtsSupportsBoundThreads(void);
+StgBool isThreadBound(StgTSO *tso);
+StgInt forkProcess(HsStablePtr *entry);
-extern SchedulerStatus rts_mainEvalIO(HaskellObj p, /*out*/HaskellObj *ret);
+extern SchedulerStatus rts_mainLazyIO(HaskellObj p, /*out*/HaskellObj *ret);
/* Called by shutdown_handler(). */
*
* These are the threads which clients have requested that we run.
*
- * In a 'threaded' build, we might have several concurrent clients all
- * waiting for results, and each one will wait on a condition variable
- * until the result is available.
+ * In a 'threaded' build, each of these corresponds to one bound thread.
+ * The pointer to the StgMainThread is passed as a parameter to schedule;
+ * this invocation of schedule will always pass this main thread's
+ * bound_thread_cond to waitForkWorkCapability; OS-thread-switching
+ * takes place using passCapability.
*
- * In non-SMP, clients are strictly nested: the first client calls
+ * In non-threaded builds, clients are strictly nested: the first client calls
* into the RTS, which might call out again to C with a _ccall_GC, and
* eventually re-enter the RTS.
*
SchedulerStatus stat;
StgClosure ** ret;
#if defined(RTS_SUPPORTS_THREADS)
- Condition wakeup;
#if defined(THREADED_RTS)
- rtsBool thread_bound;
Condition bound_thread_cond;
+#else
+ Condition wakeup;
#endif
#endif
+ struct StgMainThread_ *prev;
struct StgMainThread_ *link;
} StgMainThread;
/* Pop the first thread off the runnable queue.
*/
-#define POP_RUN_QUEUE() \
- ({ StgTSO *t = run_queue_hd; \
- if (t != END_TSO_QUEUE) { \
- run_queue_hd = t->link; \
- t->link = END_TSO_QUEUE; \
+#define POP_RUN_QUEUE(pt) \
+ do { StgTSO *__tmp_t = run_queue_hd; \
+ if (__tmp_t != END_TSO_QUEUE) { \
+ run_queue_hd = __tmp_t->link; \
+ __tmp_t->link = END_TSO_QUEUE; \
if (run_queue_hd == END_TSO_QUEUE) { \
run_queue_tl = END_TSO_QUEUE; \
} \
} \
- t; \
- })
+ pt = __tmp_t; \
+ } while(0)
/* Add a thread to the end of the blocked queue.
*/
#if defined(RTS_SUPPORTS_THREADS)
/* If no task is waiting for a capability,
+ * and if there is work to be done
+ * or if we need to wait for IO or delay requests,
* spawn a new worker thread.
- *
- * (Used by the RtsAPI)
*/
void
-startSchedulerTask(void);
+startSchedulerTaskIfNecessary(void);
+#endif
+
+#ifdef DEBUG
+extern void sched_belch(char *s, ...);
#endif
#endif /* __SCHEDULE_H__ */