/* -----------------------------------------------------------------------------
- * $Id: TSO.h,v 1.40 2005/01/28 12:55:53 simonmar Exp $
*
* (c) The GHC Team, 1998-1999
*
*/
typedef StgWord32 StgThreadID;
+/*
+ * Flags for the tso->flags field.
+ *
+ * The TSO_DIRTY flag indicates that this TSO's stack should be
+ * scanned during garbage collection. The link field of a TSO is
+ * always scanned, so we don't have to dirty a TSO just for linking
+ * it on a different list.
+ *
+ * TSO_DIRTY is set by
+ * - schedule(), just before running a thread,
+ * - raiseAsync(), because it modifies a thread's stack
+ * - resumeThread(), just before running the thread again
+ * and unset by the garbage collector (only).
+ */
+#define TSO_DIRTY 1
+
/*
* Type returned after running a thread. Values of this type
* include HeapOverflow, StackOverflow etc. See Constants.h for the
typedef unsigned int StgThreadReturnCode;
#if defined(mingw32_HOST_OS)
-/* results from an async I/O request + it's ID. */
+/* results from an async I/O request + its request ID. */
typedef struct {
unsigned int reqID;
int len;
typedef union {
StgClosure *closure;
struct StgTSO_ *tso;
- StgInt fd; // StgInt instead of int, so that it's the same size as the ptrs
+ StgInt fd; /* StgInt instead of int, so that it's the same size as the ptrs */
#if defined(mingw32_HOST_OS)
- StgAsyncIOResult* async_result;
+ StgAsyncIOResult *async_result;
#endif
StgWord target;
} StgTSOBlockInfo;
* field.
*/
-/*
- * ToDo: make this structure sensible on a non-32-bit arch.
- */
-
typedef struct StgTSO_ {
StgHeader header;
- 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 */
+ struct StgTSO_* link; /* Links threads onto blocking queues */
+ struct StgTSO_* global_link; /* Links all threads together */
- StgWord16 what_next; // Values defined in Constants.h
- StgWord16 why_blocked; // Values defined in Constants.h
+ StgWord16 what_next; /* Values defined in Constants.h */
+ StgWord16 why_blocked; /* Values defined in Constants.h */
+ StgWord32 flags;
StgTSOBlockInfo block_info;
struct StgTSO_* blocked_exceptions;
StgThreadID id;
int saved_errno;
- struct StgMainThread_* main;
- struct StgTRecHeader_ *trec; // STM transaction record
+ struct Task_* bound; // non-NULL for a bound thread
+ struct StgTRecHeader_ *trec; /* STM transaction record */
#ifdef TICKY_TICKY
- // TICKY-specific stuff would go here.
+ /* TICKY-specific stuff would go here. */
#endif
#ifdef PROFILING
StgTSOProfInfo prof;
/* this is the NIL ptr for a TSO queue (e.g. runnable queue) */
+#if IN_STG_CODE
+#define END_TSO_QUEUE (stg_END_TSO_QUEUE_closure)
+#else
#define END_TSO_QUEUE ((StgTSO *)(void*)&stg_END_TSO_QUEUE_closure)
+#endif
#if defined(PAR) || defined(GRAN)
/* this is the NIL ptr for a blocking queue */