#ifndef SCHEDULE_H
#define SCHEDULE_H
-#include "OSThreads.h"
+#include "rts/OSThreads.h"
#include "Capability.h"
+#include "Trace.h"
+
+BEGIN_RTS_PRIVATE
/* initScheduler(), exitScheduler()
* Called from STG : no
* Locks assumed : none
*/
void initScheduler (void);
-void exitScheduler (void);
+void exitScheduler (rtsBool wait_foreign);
+void freeScheduler (void);
// Place a new thread on the run queue of the current Capability
void scheduleThread (Capability *cap, StgTSO *tso);
// the desired Capability).
void scheduleThreadOn(Capability *cap, StgWord cpu, StgTSO *tso);
-/* awakenBlockedQueue()
- *
- * Takes a pointer to the beginning of a blocked TSO queue, and
- * wakes up the entire queue.
- * Called from STG : yes
- * Locks assumed : none
+/* wakeUpRts()
+ *
+ * Causes an OS thread to wake up and run the scheduler, if necessary.
*/
-#if defined(GRAN)
-void awakenBlockedQueue(StgBlockingQueueElement *q, StgClosure *node);
-#elif defined(PAR)
-void awakenBlockedQueue(StgBlockingQueueElement *q, StgClosure *node);
-#else
-void awakenBlockedQueue (Capability *cap, StgTSO *tso);
+#if defined(THREADED_RTS)
+void wakeUpRts(void);
#endif
-/* unblockOne()
- *
- * Put the specified thread on the run queue of the given Capability.
- * Called from STG : yes
- * Locks assumed : we own the Capability.
- */
-StgTSO * unblockOne(Capability *cap, StgTSO *tso);
-
-/* raiseAsync()
- *
- * Raises an exception asynchronously in the specified thread.
- *
- * Called from STG : yes
- * Locks assumed : none
- */
-void raiseAsync(Capability *cap, StgTSO *tso, StgClosure *exception);
-
-/* suspendComputation()
- *
- * A variant of raiseAsync(), this strips the stack of the specified
- * thread down to the stop_here point, leaving a current closure on
- * top of the stack at [stop_here - 1].
- */
-void suspendComputation(Capability *cap, StgTSO *tso, StgPtr stop_here);
-
/* raiseExceptionHelper */
StgWord raiseExceptionHelper (StgRegTable *reg, StgTSO *tso, StgClosure *exception);
/* findRetryFrameHelper */
StgWord findRetryFrameHelper (StgTSO *tso);
-/* GetRoots(evac_fn f)
- *
- * Call f() for each root known to the scheduler.
- *
- * Called from STG : NO
- * Locks assumed : ????
- */
-void GetRoots(evac_fn);
-
-/* workerStart()
- *
- * Entry point for a new worker task.
- * Called from STG : NO
- * Locks assumed : none
- */
-void workerStart(Task *task);
-
-#if defined(GRAN)
-void awaken_blocked_queue(StgBlockingQueueElement *q, StgClosure *node);
-void unlink_from_bq(StgTSO* tso, StgClosure* node);
-void initThread(StgTSO *tso, nat stack_size, StgInt pri);
-#elif defined(PAR)
-nat run_queue_len(void);
-void awaken_blocked_queue(StgBlockingQueueElement *q, StgClosure *node);
-void initThread(StgTSO *tso, nat stack_size);
-#else
-char *info_type(StgClosure *closure); // dummy
-char *info_type_by_ip(StgInfoTable *ip); // dummy
-void awaken_blocked_queue(StgTSO *q);
-void initThread(StgTSO *tso, nat stack_size);
-#endif
-
-/* Context switch flag.
- * Locks required : none (conflicts are harmless)
- */
-extern int RTS_VAR(context_switch);
+/* Entry point for a new worker */
+void scheduleWorker (Capability *cap, Task *task);
/* The state of the scheduler. This is used to control the sequence
* of events during shutdown, and when the runtime is interrupted
*/
#define SCHED_RUNNING 0 /* running as normal */
#define SCHED_INTERRUPTING 1 /* ^C detected, before threads are deleted */
-#define SCHED_INTERRUPTED 2 /* ^C detected, after threads deleted */
-#define SCHED_SHUTTING_DOWN 3 /* final shutdown */
+#define SCHED_SHUTTING_DOWN 2 /* final shutdown */
-extern rtsBool RTS_VAR(sched_state);
+extern volatile StgWord sched_state;
/*
* flag that tracks whether we have done any execution in this time slice.
* INACTIVE to DONE_GC happens under sched_mutex. No lock required
* to set it to ACTIVITY_YES.
*/
-extern nat recent_activity;
+extern volatile StgWord recent_activity;
/* Thread queues.
* Locks required : sched_mutex
*
* In GranSim we have one run/blocked_queue per PE.
*/
-#if defined(GRAN)
-// run_queue_hds defined in GranSim.h
-#else
-extern StgTSO *RTS_VAR(blackhole_queue);
+extern StgTSO *blackhole_queue;
#if !defined(THREADED_RTS)
-extern StgTSO *RTS_VAR(blocked_queue_hd), *RTS_VAR(blocked_queue_tl);
-extern StgTSO *RTS_VAR(sleeping_queue);
-#endif
+extern StgTSO *blocked_queue_hd, *blocked_queue_tl;
+extern StgTSO *sleeping_queue;
#endif
-/* Linked list of all threads.
- * Locks required : sched_mutex
- */
-extern StgTSO *RTS_VAR(all_threads);
-
/* Set to rtsTrue if there are threads on the blackhole_queue, and
* it is possible that one or more of them may be available to run.
* This flag is set to rtsFalse after we've checked the queue, and
*/
extern rtsBool blackholes_need_checking;
+extern rtsBool heap_overflow;
+
#if defined(THREADED_RTS)
-extern Mutex RTS_VAR(sched_mutex);
+extern Mutex sched_mutex;
#endif
-StgBool isThreadBound(StgTSO *tso);
-
-SchedulerStatus rts_mainLazyIO(HaskellObj p, /*out*/HaskellObj *ret);
-
/* Called by shutdown_handler(). */
void interruptStgRts (void);
-nat run_queue_len (void);
-
void resurrectThreads (StgTSO *);
-void printAllThreads(void);
-
-/* debugging only
- */
-#ifdef DEBUG
-void print_bq (StgClosure *node);
-#endif
-#if defined(PAR)
-void print_bqe (StgBlockingQueueElement *bqe);
-#endif
-
-void labelThread(StgPtr tso, char *label);
-
/* -----------------------------------------------------------------------------
* Some convenient macros/inline functions...
*/
* NOTE: tso->link should be END_TSO_QUEUE before calling this macro.
* ASSUMES: cap->running_task is the current task.
*/
-STATIC_INLINE void
+EXTERN_INLINE void
+appendToRunQueue (Capability *cap, StgTSO *tso);
+
+EXTERN_INLINE void
appendToRunQueue (Capability *cap, StgTSO *tso)
{
- ASSERT(tso->link == END_TSO_QUEUE);
+ ASSERT(tso->_link == END_TSO_QUEUE);
if (cap->run_queue_hd == END_TSO_QUEUE) {
cap->run_queue_hd = tso;
} else {
- cap->run_queue_tl->link = tso;
+ setTSOLink(cap, cap->run_queue_tl, tso);
}
cap->run_queue_tl = tso;
+ traceEventThreadRunnable (cap, tso);
}
-/* Push a thread on the beginning of the run queue. Used for
- * newly awakened threads, so they get run as soon as possible.
+/* Push a thread on the beginning of the run queue.
* ASSUMES: cap->running_task is the current task.
*/
-STATIC_INLINE void
+INLINE_HEADER void
pushOnRunQueue (Capability *cap, StgTSO *tso)
{
- tso->link = cap->run_queue_hd;
+ setTSOLink(cap, tso, cap->run_queue_hd);
cap->run_queue_hd = tso;
if (cap->run_queue_tl == END_TSO_QUEUE) {
cap->run_queue_tl = tso;
/* Pop the first thread off the runnable queue.
*/
-STATIC_INLINE StgTSO *
+INLINE_HEADER StgTSO *
popRunQueue (Capability *cap)
{
StgTSO *t = cap->run_queue_hd;
ASSERT(t != END_TSO_QUEUE);
- cap->run_queue_hd = t->link;
- t->link = END_TSO_QUEUE;
+ cap->run_queue_hd = t->_link;
+ t->_link = END_TSO_QUEUE; // no write barrier req'd
if (cap->run_queue_hd == END_TSO_QUEUE) {
cap->run_queue_tl = END_TSO_QUEUE;
}
/* Add a thread to the end of the blocked queue.
*/
#if !defined(THREADED_RTS)
-STATIC_INLINE void
+INLINE_HEADER void
appendToBlockedQueue(StgTSO *tso)
{
- ASSERT(tso->link == END_TSO_QUEUE);
+ ASSERT(tso->_link == END_TSO_QUEUE);
if (blocked_queue_hd == END_TSO_QUEUE) {
blocked_queue_hd = tso;
} else {
- blocked_queue_tl->link = tso;
+ setTSOLink(&MainCapability, blocked_queue_tl, tso);
}
blocked_queue_tl = tso;
}
#endif
-#if defined(THREADED_RTS)
-STATIC_INLINE void
-appendToWakeupQueue (Capability *cap, StgTSO *tso)
-{
- ASSERT(tso->link == END_TSO_QUEUE);
- if (cap->wakeup_queue_hd == END_TSO_QUEUE) {
- cap->wakeup_queue_hd = tso;
- } else {
- cap->wakeup_queue_tl->link = tso;
- }
- cap->wakeup_queue_tl = tso;
-}
-#endif
-
/* Check whether various thread queues are empty
*/
-STATIC_INLINE rtsBool
+INLINE_HEADER rtsBool
emptyQueue (StgTSO *q)
{
return (q == END_TSO_QUEUE);
}
-STATIC_INLINE rtsBool
+INLINE_HEADER rtsBool
emptyRunQueue(Capability *cap)
{
return emptyQueue(cap->run_queue_hd);
}
-#if defined(THREADED_RTS)
-STATIC_INLINE rtsBool
-emptyWakeupQueue(Capability *cap)
-{
- return emptyQueue(cap->wakeup_queue_hd);
-}
-#endif
-
#if !defined(THREADED_RTS)
#define EMPTY_BLOCKED_QUEUE() (emptyQueue(blocked_queue_hd))
#define EMPTY_SLEEPING_QUEUE() (emptyQueue(sleeping_queue))
#endif
-STATIC_INLINE rtsBool
+INLINE_HEADER rtsBool
emptyThreadQueues(Capability *cap)
{
return emptyRunQueue(cap)
;
}
-#ifdef DEBUG
-void sched_belch(char *s, ...)
- GNU_ATTRIBUTE(format (printf, 1, 2));
-#endif
-
#endif /* !IN_STG_CODE */
-STATIC_INLINE void
-dirtyTSO (StgTSO *tso)
-{
- tso->flags |= TSO_DIRTY;
-}
+END_RTS_PRIVATE
#endif /* SCHEDULE_H */
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