X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fincludes%2FTSO.h;h=87ea876792a8af73ebb0af211626794fb255bdea;hb=423d477bfecd490de1449c59325c8776f91d7aac;hp=19a162e0366c65064b0d77bf1f838c27ccfcade9;hpb=fbbed914e114b6b55158319dca8956885f301ff5;p=ghc-hetmet.git diff --git a/ghc/includes/TSO.h b/ghc/includes/TSO.h index 19a162e..87ea876 100644 --- a/ghc/includes/TSO.h +++ b/ghc/includes/TSO.h @@ -1,5 +1,5 @@ /* ----------------------------------------------------------------------------- - * $Id: TSO.h,v 1.27 2002/06/26 08:18:41 stolz Exp $ + * $Id: TSO.h,v 1.35 2004/08/13 13:09:40 simonmar Exp $ * * (c) The GHC Team, 1998-1999 * @@ -36,65 +36,64 @@ typedef struct { } StgTSOStatBuf; #endif -#if defined(PROFILING) +/* + * PROFILING info in a TSO + */ typedef struct { CostCentreStack *CCCS; /* thread's current CCS */ } StgTSOProfInfo; -#else /* !PROFILING */ -typedef struct { -} StgTSOProfInfo; -#endif /* PROFILING */ -#if defined(PAR) +/* + * PAR info in a TSO + */ +#ifdef PAR typedef StgTSOStatBuf StgTSOParInfo; -#else /* !PAR */ +#else +#ifdef SUPPORTS_EMPTY_STRUCTS typedef struct { + /* empty */ } StgTSOParInfo; -#endif /* PAR */ +#endif +#endif -#if defined(DIST) +/* + * DIST info in a TSO + */ +#ifdef DIST typedef struct { StgThreadPriority priority; StgInt revalTid; /* ToDo: merge both into 1 word */ StgInt revalSlot; } StgTSODistInfo; -#else /* !DIST */ +#else +#ifdef SUPPORTS_EMPTY_STRUCTS typedef struct { + /* empty */ } StgTSODistInfo; -#endif /* DIST */ +#endif +#endif -#if defined(GRAN) +/* + * GRAN info in a TSO + */ +#ifdef GRAN typedef StgTSOStatBuf StgTSOGranInfo; -#else /* !GRAN */ +#else +#ifdef SUPPORTS_EMPTY_STRUCTS typedef struct { + /* empty */ } StgTSOGranInfo; -#endif /* GRAN */ - - -#if defined(TICKY) -typedef struct { -} StgTSOTickyInfo; -#else /* !TICKY_TICKY */ -typedef struct { -} StgTSOTickyInfo; -#endif /* TICKY_TICKY */ - -typedef enum { - tso_state_runnable, - tso_state_stopped -} StgTSOState; +#endif +#endif /* - * The what_next field of a TSO indicates how the thread is to be run. + * TICKY_TICKY info in a TSO */ -typedef enum { - 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; +#ifdef SUPPORTS_EMPTY_STRUCTS +typedef struct { + /* empty */ +} StgTSOTickyInfo; +#endif /* * Thread IDs are 32 bits. @@ -102,17 +101,11 @@ typedef enum { typedef StgWord32 StgThreadID; /* - * This type is returned to the scheduler by a thread that has - * stopped for one reason or another. + * Type returned after running a thread. Values of this type + * include HeapOverflow, StackOverflow etc. See Constants.h for the + * full list. */ - -typedef enum { - HeapOverflow, /* might also be StackOverflow */ - StackOverflow, - ThreadYielding, - ThreadBlocked, - ThreadFinished -} StgThreadReturnCode; +typedef unsigned int StgThreadReturnCode; /* * We distinguish between the various classes of threads in the system. @@ -124,35 +117,22 @@ typedef enum { RevalPriority } StgThreadPriority; -/* - * Threads may be blocked for several reasons. A blocked thread will - * have the reason in the why_blocked field of the TSO, and some - * further info (such as the closure the thread is blocked on, or the - * file descriptor if the thread is waiting on I/O) in the block_info - * field. - */ - -typedef enum { - NotBlocked, - BlockedOnMVar, - BlockedOnBlackHole, - BlockedOnException, - 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 -#if defined(RTS_SUPPORTS_THREADS) - , BlockedOnCCall +#if defined(mingw32_TARGET_OS) +/* results from an async I/O request + it's ID. */ +typedef struct { + unsigned int reqID; + int len; + int errCode; +} StgAsyncIOResult; #endif -} StgTSOBlockReason; typedef union { StgClosure *closure; struct StgTSO_ *tso; int fd; +#if defined(mingw32_TARGET_OS) + StgAsyncIOResult* async_result; +#endif unsigned int target; } StgTSOBlockInfo; @@ -163,33 +143,46 @@ typedef union { */ /* + * Threads may be blocked for several reasons. A blocked thread will + * have the reason in the why_blocked field of the TSO, and some + * further info (such as the closure the thread is blocked on, or the + * file descriptor if the thread is waiting on I/O) in the block_info + * 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 */ + 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; + StgWord16 what_next; // Values defined in Constants.h + StgWord16 why_blocked; // Values defined in Constants.h StgTSOBlockInfo block_info; struct StgTSO_* blocked_exceptions; StgThreadID id; + int saved_errno; + +#ifdef TICKY_TICKY + MAYBE_EMPTY_STRUCT(StgTSOTickyInfo,ticky) +#endif +#ifdef PROFILING + StgTSOProfInfo prof; +#endif + + MAYBE_EMPTY_STRUCT(StgTSOParInfo,par); + MAYBE_EMPTY_STRUCT(StgTSOGranInfo,gran); + MAYBE_EMPTY_STRUCT(StgTSODistInfo,dist); - StgTSOTickyInfo ticky; - StgTSOProfInfo prof; - StgTSOParInfo par; - StgTSOGranInfo gran; - StgTSODistInfo dist; - /* The thread stack... */ StgWord stack_size; /* stack size in *words* */ StgWord max_stack_size; /* maximum stack size in *words* */ StgPtr sp; - StgUpdateFrame* su; StgWord stack[FLEXIBLE_ARRAY]; } StgTSO; @@ -270,4 +263,16 @@ extern StgTSO dummy_tso; #define TSO_STRUCT_SIZEW (TSO_STRUCT_SIZE / sizeof(W_)) + +/* this is the NIL ptr for a TSO queue (e.g. runnable queue) */ +#define END_TSO_QUEUE ((StgTSO *)(void*)&stg_END_TSO_QUEUE_closure) + +#if defined(PAR) || defined(GRAN) +/* this is the NIL ptr for a blocking queue */ +# define END_BQ_QUEUE ((StgBlockingQueueElement *)(void*)&stg_END_TSO_QUEUE_closure) +/* this is the NIL ptr for a blocked fetch queue (as in PendingFetches in GUM) */ +# define END_BF_QUEUE ((StgBlockedFetch *)(void*)&stg_END_TSO_QUEUE_closure) +#endif +/* ToDo?: different name for end of sleeping queue ? -- HWL */ + #endif /* TSO_H */