/* -----------------------------------------------------------------------------
- * $Id: TSO.h,v 1.9 1999/12/01 14:34:49 simonmar Exp $
+ * $Id: TSO.h,v 1.19 2000/12/14 15:19:47 sewardj Exp $
*
* (c) The GHC Team, 1998-1999
*
#ifndef TSO_H
#define TSO_H
+#if defined(GRAN) || defined(PAR)
+
+#if DEBUG // && PARANOIA_LEVEL>999
+// magic marker for TSOs; debugging only
+#define TSO_MAGIC 4321
+#endif
+
+typedef struct {
+ StgInt pri;
+ StgInt magic;
+ StgInt sparkname;
+ rtsTime startedat;
+ rtsBool exported;
+ StgInt basicblocks;
+ StgInt allocs;
+ rtsTime exectime;
+ rtsTime fetchtime;
+ rtsTime fetchcount;
+ rtsTime blocktime;
+ StgInt blockcount;
+ rtsTime blockedat;
+ StgInt globalsparks;
+ StgInt localsparks;
+ rtsTime clock;
+} StgTSOStatBuf;
+#endif
+
#if defined(PROFILING)
typedef struct {
CostCentreStack *CCCS; /* thread's current CCS */
#endif /* PROFILING */
#if defined(PAR)
-typedef struct {
-} StgTSOParInfo;
+typedef StgTSOStatBuf StgTSOParInfo;
#else /* !PAR */
typedef struct {
} StgTSOParInfo;
#endif /* PAR */
-#if defined(TICKY_TICKY)
+#if defined(GRAN)
+typedef StgTSOStatBuf StgTSOGranInfo;
+#else /* !GRAN */
+typedef struct {
+} StgTSOGranInfo;
+#endif /* GRAN */
+
+
+#if defined(TICKY)
typedef struct {
} StgTSOTickyInfo;
#else /* !TICKY_TICKY */
tso_state_stopped
} StgTSOState;
+/*
+ * The what_next field of a TSO indicates how the thread is to be run.
+ */
typedef enum {
- ThreadEnterGHC,
- ThreadRunGHC,
- ThreadEnterHugs,
- ThreadKilled,
- ThreadComplete
+ ThreadEnterGHC, /* enter top thunk on stack */
+ ThreadRunGHC, /* return to address on top of stack */
+ ThreadEnterInterp, /* enter top thunk on stack (w/ interpreter) */
+ ThreadKilled, /* thread has died, don't run it */
+ ThreadRelocated, /* thread has moved, link points to new locn */
+ ThreadComplete /* thread has finished */
} StgTSOWhatNext;
/*
BlockedOnRead,
BlockedOnWrite,
BlockedOnDelay
+#if defined(PAR)
+ , BlockedOnGA // blocked on a remote closure represented by a Global Address
+ , BlockedOnGA_NoSend // same as above but without sending a Fetch message
+#endif
} StgTSOBlockReason;
typedef union {
StgClosure *closure;
struct StgTSO_ *tso;
int fd;
- unsigned int delay;
+ unsigned int target;
} StgTSOBlockInfo;
/*
* storage manager, and won't be copied during garbage collection.
*/
+/*
+ * ToDo: make this structure sensible on a non-32-bit arch.
+ */
+
typedef struct StgTSO_ {
StgHeader header;
- struct StgTSO_* link;
- StgMutClosure * mut_link; /* TSO's are mutable of course! */
- StgTSOWhatNext whatNext;
- StgTSOBlockReason why_blocked;
+
+ struct StgTSO_* link; /* Links threads onto blocking queues */
+ StgMutClosure * mut_link; /* TSO's are mutable of course! */
+ struct StgTSO_* global_link; /* Links all threads together */
+
+ StgTSOWhatNext what_next : 16;
+ StgTSOBlockReason why_blocked : 16;
StgTSOBlockInfo block_info;
struct StgTSO_* blocked_exceptions;
StgThreadID id;
+
StgTSOTickyInfo ticky;
StgTSOProfInfo prof;
StgTSOParInfo par;
- /* GranSim Info? */
+ StgTSOGranInfo gran;
/* The thread stack... */
StgWord stack_size; /* stack size in *words* */
StgWord max_stack_size; /* maximum stack size in *words* */
StgPtr sp;
StgUpdateFrame* su;
- StgPtr splim;
StgWord stack[0];
} StgTSO;
tso->stack < tso->sp < tso->stack+tso->stack_size
tso->stack_size <= tso->max_stack_size
- tso->splim == tso->stack + RESERVED_STACK_WORDS;
RESERVED_STACK_WORDS is large enough for any heap-check or
stack-check failure.
(a) smaller than a block, or
(b) a multiple of BLOCK_SIZE
- tso->block_reason tso->block_info location
+ tso->why_blocked tso->block_info location
----------------------------------------------------------------------
NotBlocked NULL runnable_queue, or running
BlockedOnRead NULL blocked_queue
BlockedOnWrite NULL blocked_queue
BlockedOnDelay NULL blocked_queue
+ BlockedOnGA closure TSO blocks on BQ of that closure
+ BlockedOnGA_NoSend closure TSO blocks on BQ of that closure
tso->link == END_TSO_QUEUE, if the thread is currently running.
A zombie thread has the following properties:
- tso->whatNext == ThreadComplete or ThreadKilled
+ tso->what_next == ThreadComplete or ThreadKilled
tso->link == (could be on some queue somewhere)
tso->su == tso->stack + tso->stack_size
tso->sp == tso->stack + tso->stack_size - 1 (i.e. top stack word)
- tso->sp[0] == return value of thread, if whatNext == ThreadComplete,
- exception , if whatNext == ThreadKilled
+ tso->sp[0] == return value of thread, if what_next == ThreadComplete,
+ exception , if what_next == ThreadKilled
(tso->sp is left pointing at the top word on the stack so that
the return value or exception will be retained by a GC).
(StgTSO *)tso if threads are currently awaiting delivery of
exceptions to this thread.
+ The 2 cases BlockedOnGA and BlockedOnGA_NoSend are needed in a GUM
+ setup only. They mark a TSO that has entered a FETCH_ME or
+ FETCH_ME_BQ closure, respectively; only the first TSO hitting the
+ closure will send a Fetch message.
+ Currently we have no separate code for blocking on an RBH; we use the
+ BlockedOnBlackHole case for that. -- HWL
+
---------------------------------------------------------------------------- */
/* Workaround for a bug/quirk in gcc on certain architectures.
projects / ghc-hetmet.git / blobdiff