[p5sagit/p5-mst-13.2.git] / thread.h

#ifndef USE_THREADS
#define MUTEX_LOCK(m)
#define MUTEX_UNLOCK(m)
#define MUTEX_INIT(m)
#define MUTEX_DESTROY(m)
#define COND_INIT(c)
#define COND_SIGNAL(c)
#define COND_BROADCAST(c)
#define COND_WAIT(c, m)
#define COND_DESTROY(c)

#define THR
/* Rats: if dTHR is just blank then the subsequent ";" throws an error */
#define dTHR extern int errno
#else

#ifdef FAKE_THREADS
typedef struct thread *perl_thread;
/* With fake threads, thr is global(ish) so we don't need dTHR */
#define dTHR extern int errno

/*
 * Note that SCHEDULE() is only callable from pp code (which
 * must be expecting to be restarted). We'll have to do
 * something a bit different for XS code.
 */
#define SCHEDULE() return schedule(), op

#define MUTEX_LOCK(m)
#define MUTEX_UNLOCK(m)
#define MUTEX_INIT(m)
#define MUTEX_DESTROY(m)
#define COND_INIT(c) perl_cond_init(c)
#define COND_SIGNAL(c) perl_cond_signal(c)
#define COND_BROADCAST(c) perl_cond_broadcast(c)
#define COND_WAIT(c, m) STMT_START {	\
	perl_cond_wait(c);		\
	SCHEDULE();			\
    } STMT_END
#define COND_DESTROY(c)
#else
/* POSIXish threads */
typedef pthread_t perl_thread;
#ifdef OLD_PTHREADS_API
#define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
#define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
#define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
#else
#define pthread_mutexattr_default NULL
#define pthread_condattr_default NULL
#endif /* OLD_PTHREADS_API */

#define MUTEX_INIT(m) \
    if (pthread_mutex_init((m), pthread_mutexattr_default)) \
	croak("panic: MUTEX_INIT"); \
    else 1
#define MUTEX_LOCK(m) \
    if (pthread_mutex_lock((m))) croak("panic: MUTEX_LOCK"); else 1
#define MUTEX_UNLOCK(m) \
    if (pthread_mutex_unlock((m))) croak("panic: MUTEX_UNLOCK"); else 1
#define MUTEX_DESTROY(m) \
    if (pthread_mutex_destroy((m))) croak("panic: MUTEX_DESTROY"); else 1
#define COND_INIT(c) \
    if (pthread_cond_init((c), pthread_condattr_default)) \
	croak("panic: COND_INIT"); \
    else 1
#define COND_SIGNAL(c) \
    if (pthread_cond_signal((c))) croak("panic: COND_SIGNAL"); else 1
#define COND_BROADCAST(c) \
    if (pthread_cond_broadcast((c))) croak("panic: COND_BROADCAST"); else 1
#define COND_WAIT(c, m) \
    if (pthread_cond_wait((c), (m))) croak("panic: COND_WAIT"); else 1
#define COND_DESTROY(c) \
    if (pthread_cond_destroy((c))) croak("panic: COND_DESTROY"); else 1

/* DETACH(t) must only be called while holding t->mutex */
#define DETACH(t)			\
    if (pthread_detach((t)->Tself)) {	\
	MUTEX_UNLOCK(&(t)->mutex);	\
	croak("panic: DETACH");		\
    } else 1

/* XXX Add "old" (?) POSIX draft interface too */
#ifdef OLD_PTHREADS_API
struct thread *getTHR _((void));
#define THR getTHR()
#else
#define THR ((struct thread *) pthread_getspecific(thr_key))
#endif /* OLD_PTHREADS_API */
#define dTHR struct thread *thr = THR
#endif /* FAKE_THREADS */

#ifndef INIT_THREADS
#  ifdef NEED_PTHREAD_INIT
#    define INIT_THREADS pthread_init()
#  else
#    define INIT_THREADS NOOP
#  endif
#endif

struct thread {
    /* The fields that used to be global */
    /* Important ones in the first cache line (if alignment is done right) */
    SV **	Tstack_sp;
#ifdef OP_IN_REGISTER
    OP *	Topsave;
#else
    OP *	Top;
#endif
    SV **	Tcurpad;
    SV **	Tstack_base;

    SV **	Tstack_max;

    I32 *	Tscopestack;
    I32		Tscopestack_ix;
    I32		Tscopestack_max;

    ANY *	Tsavestack;
    I32		Tsavestack_ix;
    I32		Tsavestack_max;

    OP **	Tretstack;
    I32		Tretstack_ix;
    I32		Tretstack_max;

    I32 *	Tmarkstack;
    I32 *	Tmarkstack_ptr;
    I32 *	Tmarkstack_max;

    SV *	TSv;
    XPV *	TXpv;
    struct stat	Tstatbuf;
    struct tms	Ttimesbuf;
    
    /* XXX What about regexp stuff? */

    /* Now the fields that used to be "per interpreter" (even when global) */

    /* XXX What about magic variables such as $/, $? and so on? */
    HV *	Tdefstash;
    HV *	Tcurstash;

    SV **	Ttmps_stack;
    I32		Ttmps_ix;
    I32		Ttmps_floor;
    I32		Ttmps_max;

    int		Tin_eval;
    OP *	Trestartop;
    int		Tdelaymagic;
    bool	Tdirty;
    U8		Tlocalizing;
    COP *	Tcurcop;

    CONTEXT *	Tcxstack;
    I32		Tcxstack_ix;
    I32		Tcxstack_max;

    AV *	Tcurstack;
    AV *	Tmainstack;
    JMPENV *	Ttop_env;
    I32		Trunlevel;

    /* XXX Sort stuff, firstgv, secongv and so on? */

    perl_thread	Tself;
    SV *	Toursv;
    HV *	Tcvcache;
    U32		flags;
    perl_mutex	mutex;			/* For the fields others can change */
    U32		tid;
    struct thread *next, *prev;		/* Circular linked list of threads */

#ifdef ADD_THREAD_INTERN
    struct thread_intern i;		/* Platform-dependent internals */
#endif
};

typedef struct thread *Thread;

/* Values and macros for thr->flags */
#define THRf_STATE_MASK	7
#define THRf_R_JOINABLE	0
#define THRf_R_JOINED	1
#define THRf_R_DETACHED	2
#define THRf_ZOMBIE	3
#define THRf_DEAD	4

#define THRf_DIE_FATAL	8

/* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */
#define ThrSTATE(t) ((t)->flags)
#define ThrSETSTATE(t, s) STMT_START {		\
	(t)->flags &= ~THRf_STATE_MASK;		\
	(t)->flags |= (s);			\
	DEBUG_L(PerlIO_printf(PerlIO_stderr(),	\
			      "thread %p set to state %d\n", (t), (s))); \
    } STMT_END

typedef struct condpair {
    perl_mutex	mutex;		/* Protects all other fields */
    perl_cond	owner_cond;	/* For when owner changes at all */
    perl_cond	cond;		/* For cond_signal and cond_broadcast */
    Thread	owner;		/* Currently owning thread */
} condpair_t;

#define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex)
#define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond)
#define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond)
#define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner

#undef	stack_base
#undef	stack_sp
#undef	stack_max
#undef	curstack
#undef	mainstack
#undef	markstack
#undef	markstack_ptr
#undef	markstack_max
#undef	scopestack
#undef	scopestack_ix
#undef	scopestack_max
#undef	savestack
#undef	savestack_ix
#undef	savestack_max
#undef	retstack
#undef	retstack_ix
#undef	retstack_max
#undef	curcop
#undef	cxstack
#undef	cxstack_ix
#undef	cxstack_max
#undef	defstash
#undef	curstash
#undef	tmps_stack
#undef	tmps_floor
#undef	tmps_ix
#undef	tmps_max
#undef	curpad
#undef	Sv
#undef	Xpv
#undef	statbuf
#undef	timesbuf
#undef	top_env
#undef	runlevel
#undef	in_eval
#undef	restartop
#undef	delaymagic
#undef	dirty
#undef	localizing

#define self		(thr->Tself)
#define oursv		(thr->Toursv)
#define stack_base	(thr->Tstack_base)
#define stack_sp	(thr->Tstack_sp)
#define stack_max	(thr->Tstack_max)
#ifdef OP_IN_REGISTER
#define opsave		(thr->Topsave)
#else
#undef	op
#define op		(thr->Top)
#endif
#define	curcop		(thr->Tcurcop)
#define	stack		(thr->Tstack)
#define curstack	(thr->Tcurstack)
#define	mainstack	(thr->Tmainstack)
#define	markstack	(thr->Tmarkstack)
#define	markstack_ptr	(thr->Tmarkstack_ptr)
#define	markstack_max	(thr->Tmarkstack_max)
#define	scopestack	(thr->Tscopestack)
#define	scopestack_ix	(thr->Tscopestack_ix)
#define	scopestack_max	(thr->Tscopestack_max)

#define	savestack	(thr->Tsavestack)
#define	savestack_ix	(thr->Tsavestack_ix)
#define	savestack_max	(thr->Tsavestack_max)

#define	retstack	(thr->Tretstack)
#define	retstack_ix	(thr->Tretstack_ix)
#define	retstack_max	(thr->Tretstack_max)

#define	cxstack		(thr->Tcxstack)
#define	cxstack_ix	(thr->Tcxstack_ix)
#define	cxstack_max	(thr->Tcxstack_max)

#define curpad		(thr->Tcurpad)
#define Sv		(thr->TSv)
#define Xpv		(thr->TXpv)
#define statbuf		(thr->Tstatbuf)
#define timesbuf	(thr->Ttimesbuf)
#define defstash	(thr->Tdefstash)
#define curstash	(thr->Tcurstash)

#define tmps_stack	(thr->Ttmps_stack)
#define tmps_ix		(thr->Ttmps_ix)
#define tmps_floor	(thr->Ttmps_floor)
#define tmps_max	(thr->Ttmps_max)

#define in_eval		(thr->Tin_eval)
#define restartop	(thr->Trestartop)
#define delaymagic	(thr->Tdelaymagic)
#define dirty		(thr->Tdirty)
#define localizing	(thr->Tlocalizing)

#define	top_env		(thr->Ttop_env)
#define	runlevel	(thr->Trunlevel)

#define	cvcache		(thr->Tcvcache)
#endif /* USE_THREADS */
Commit	Line	Data
11343788	1	#ifndef USE_THREADS
	2	#define MUTEX_LOCK(m)
	3	#define MUTEX_UNLOCK(m)
	4	#define MUTEX_INIT(m)
	5	#define MUTEX_DESTROY(m)
	6	#define COND_INIT(c)
	7	#define COND_SIGNAL(c)
	8	#define COND_BROADCAST(c)
	9	#define COND_WAIT(c, m)
	10	#define COND_DESTROY(c)
	11
	12	#define THR
	13	/* Rats: if dTHR is just blank then the subsequent ";" throws an error */
	14	#define dTHR extern int errno
	15	#else
11343788	16
12ca11f6	17	#ifdef FAKE_THREADS
	18	typedef struct thread *perl_thread;
	19	/* With fake threads, thr is global(ish) so we don't need dTHR */
	20	#define dTHR extern int errno
	21
	22	/*
	23	* Note that SCHEDULE() is only callable from pp code (which
	24	* must be expecting to be restarted). We'll have to do
	25	* something a bit different for XS code.
	26	*/
	27	#define SCHEDULE() return schedule(), op
	28
	29	#define MUTEX_LOCK(m)
	30	#define MUTEX_UNLOCK(m)
	31	#define MUTEX_INIT(m)
	32	#define MUTEX_DESTROY(m)
	33	#define COND_INIT(c) perl_cond_init(c)
	34	#define COND_SIGNAL(c) perl_cond_signal(c)
	35	#define COND_BROADCAST(c) perl_cond_broadcast(c)
	36	#define COND_WAIT(c, m) STMT_START { \
	37	perl_cond_wait(c); \
	38	SCHEDULE(); \
	39	} STMT_END
	40	#define COND_DESTROY(c)
12ca11f6	41	#else
	42	/* POSIXish threads */
	43	typedef pthread_t perl_thread;
11343788	44	#ifdef OLD_PTHREADS_API
	45	#define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
	46	#define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
	47	#define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
	48	#else
	49	#define pthread_mutexattr_default NULL
b851de6c	50	#define pthread_condattr_default NULL
11343788	51	#endif /* OLD_PTHREADS_API */
	52
	53	#define MUTEX_INIT(m) \
	54	if (pthread_mutex_init((m), pthread_mutexattr_default)) \
	55	croak("panic: MUTEX_INIT"); \
	56	else 1
	57	#define MUTEX_LOCK(m) \
	58	if (pthread_mutex_lock((m))) croak("panic: MUTEX_LOCK"); else 1
	59	#define MUTEX_UNLOCK(m) \
	60	if (pthread_mutex_unlock((m))) croak("panic: MUTEX_UNLOCK"); else 1
	61	#define MUTEX_DESTROY(m) \
	62	if (pthread_mutex_destroy((m))) croak("panic: MUTEX_DESTROY"); else 1
	63	#define COND_INIT(c) \
b851de6c	64	if (pthread_cond_init((c), pthread_condattr_default)) \
	65	croak("panic: COND_INIT"); \
	66	else 1
11343788	67	#define COND_SIGNAL(c) \
	68	if (pthread_cond_signal((c))) croak("panic: COND_SIGNAL"); else 1
	69	#define COND_BROADCAST(c) \
	70	if (pthread_cond_broadcast((c))) croak("panic: COND_BROADCAST"); else 1
	71	#define COND_WAIT(c, m) \
	72	if (pthread_cond_wait((c), (m))) croak("panic: COND_WAIT"); else 1
	73	#define COND_DESTROY(c) \
	74	if (pthread_cond_destroy((c))) croak("panic: COND_DESTROY"); else 1
33f46ff6	75
f826a10b	76	/* DETACH(t) must only be called while holding t->mutex */
	77	#define DETACH(t) \
	78	if (pthread_detach((t)->Tself)) { \
	79	MUTEX_UNLOCK(&(t)->mutex); \
	80	croak("panic: DETACH"); \
	81	} else 1
33f46ff6	82
11343788	83	/* XXX Add "old" (?) POSIX draft interface too */
	84	#ifdef OLD_PTHREADS_API
	85	struct thread *getTHR _((void));
	86	#define THR getTHR()
	87	#else
	88	#define THR ((struct thread *) pthread_getspecific(thr_key))
	89	#endif /* OLD_PTHREADS_API */
	90	#define dTHR struct thread *thr = THR
12ca11f6	91	#endif /* FAKE_THREADS */
11343788	92
33f46ff6	93	#ifndef INIT_THREADS
	94	# ifdef NEED_PTHREAD_INIT
	95	# define INIT_THREADS pthread_init()
	96	# else
	97	# define INIT_THREADS NOOP
	98	# endif
	99	#endif
11343788	100
33f46ff6	101	struct thread {
11343788	102	/* The fields that used to be global */
33f46ff6	103	/* Important ones in the first cache line (if alignment is done right) */
11343788	104	SV ** Tstack_sp;
462e5cf6	105	#ifdef OP_IN_REGISTER
	106	OP * Topsave;
	107	#else
11343788	108	OP * Top;
462e5cf6	109	#endif
33f46ff6	110	SV ** Tcurpad;
	111	SV ** Tstack_base;
	112
	113	SV ** Tstack_max;
11343788	114
	115	I32 * Tscopestack;
	116	I32 Tscopestack_ix;
	117	I32 Tscopestack_max;
	118
	119	ANY * Tsavestack;
	120	I32 Tsavestack_ix;
	121	I32 Tsavestack_max;
	122
	123	OP ** Tretstack;
	124	I32 Tretstack_ix;
	125	I32 Tretstack_max;
	126
	127	I32 * Tmarkstack;
	128	I32 * Tmarkstack_ptr;
	129	I32 * Tmarkstack_max;
	130
11343788	131	SV * TSv;
11343788	132	XPV * TXpv;
11343788	133	struct stat Tstatbuf;
	134	struct tms Ttimesbuf;
	135
	136	/* XXX What about regexp stuff? */
	137
	138	/* Now the fields that used to be "per interpreter" (even when global) */
	139
	140	/* XXX What about magic variables such as $/, $? and so on? */
	141	HV * Tdefstash;
	142	HV * Tcurstash;
11343788	143
	144	SV ** Ttmps_stack;
	145	I32 Ttmps_ix;
	146	I32 Ttmps_floor;
	147	I32 Ttmps_max;
	148
	149	int Tin_eval;
	150	OP * Trestartop;
	151	int Tdelaymagic;
	152	bool Tdirty;
	153	U8 Tlocalizing;
0f15f207	154	COP * Tcurcop;
11343788	155
	156	CONTEXT * Tcxstack;
	157	I32 Tcxstack_ix;
	158	I32 Tcxstack_max;
	159
0f15f207	160	AV * Tcurstack;
11343788	161	AV * Tmainstack;
e858de61	162	JMPENV * Ttop_env;
11343788	163	I32 Trunlevel;
	164
	165	/* XXX Sort stuff, firstgv, secongv and so on? */
	166
33f46ff6	167	perl_thread Tself;
33f46ff6	168	SV * Toursv;
11343788	169	HV * Tcvcache;
33f46ff6	170	U32 flags;
f826a10b	171	perl_mutex mutex; /* For the fields others can change */
33f46ff6	172	U32 tid;
33f46ff6	173	struct thread next, prev; /* Circular linked list of threads */
12ca11f6	174
f826a10b	175	#ifdef ADD_THREAD_INTERN
	176	struct thread_intern i; /* Platform-dependent internals */
	177	#endif
11343788	178	};
	179
	180	typedef struct thread *Thread;
	181
33f46ff6	182	/* Values and macros for thr->flags */
605e5515	183	#define THRf_STATE_MASK 7
	184	#define THRf_R_JOINABLE 0
	185	#define THRf_R_JOINED 1
	186	#define THRf_R_DETACHED 2
	187	#define THRf_ZOMBIE 3
	188	#define THRf_DEAD 4
f93b4edd	189
605e5515	190	#define THRf_DIE_FATAL 8
07b73707	191
f826a10b	192	/* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */
605e5515	193	#define ThrSTATE(t) ((t)->flags)
f93b4edd	194	#define ThrSETSTATE(t, s) STMT_START { \
605e5515	195	(t)->flags &= ~THRf_STATE_MASK; \
33f46ff6	196	(t)->flags \|= (s); \
605e5515	197	DEBUG_L(PerlIO_printf(PerlIO_stderr(), \
605e5515	198	"thread %p set to state %d\n", (t), (s))); \
f93b4edd	199	} STMT_END
	200
	201	typedef struct condpair {
f826a10b	202	perl_mutex mutex; /* Protects all other fields */
	203	perl_cond owner_cond; /* For when owner changes at all */
	204	perl_cond cond; /* For cond_signal and cond_broadcast */
	205	Thread owner; /* Currently owning thread */
f93b4edd	206	} condpair_t;
	207
	208	#define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex)
	209	#define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond)
	210	#define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond)
	211	#define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner
	212
11343788	213	#undef stack_base
	214	#undef stack_sp
	215	#undef stack_max
0f15f207	216	#undef curstack
11343788	217	#undef mainstack
	218	#undef markstack
	219	#undef markstack_ptr
	220	#undef markstack_max
	221	#undef scopestack
	222	#undef scopestack_ix
	223	#undef scopestack_max
	224	#undef savestack
	225	#undef savestack_ix
	226	#undef savestack_max
	227	#undef retstack
	228	#undef retstack_ix
	229	#undef retstack_max
0f15f207	230	#undef curcop
11343788	231	#undef cxstack
	232	#undef cxstack_ix
	233	#undef cxstack_max
809a5acc	234	#undef defstash
809a5acc	235	#undef curstash
6d4ff0d2	236	#undef tmps_stack
	237	#undef tmps_floor
	238	#undef tmps_ix
	239	#undef tmps_max
11343788	240	#undef curpad
	241	#undef Sv
	242	#undef Xpv
96827780	243	#undef statbuf
96827780	244	#undef timesbuf
11343788	245	#undef top_env
	246	#undef runlevel
	247	#undef in_eval
809a5acc	248	#undef restartop
	249	#undef delaymagic
	250	#undef dirty
	251	#undef localizing
11343788	252
11343788	253	#define self (thr->Tself)
07b73707	254	#define oursv (thr->Toursv)
11343788	255	#define stack_base (thr->Tstack_base)
	256	#define stack_sp (thr->Tstack_sp)
	257	#define stack_max (thr->Tstack_max)
462e5cf6	258	#ifdef OP_IN_REGISTER
	259	#define opsave (thr->Topsave)
	260	#else
	261	#undef op
11343788	262	#define op (thr->Top)
462e5cf6	263	#endif
0f15f207	264	#define curcop (thr->Tcurcop)
11343788	265	#define stack (thr->Tstack)
809a5acc	266	#define curstack (thr->Tcurstack)
11343788	267	#define mainstack (thr->Tmainstack)
	268	#define markstack (thr->Tmarkstack)
	269	#define markstack_ptr (thr->Tmarkstack_ptr)
	270	#define markstack_max (thr->Tmarkstack_max)
	271	#define scopestack (thr->Tscopestack)
	272	#define scopestack_ix (thr->Tscopestack_ix)
	273	#define scopestack_max (thr->Tscopestack_max)
	274
	275	#define savestack (thr->Tsavestack)
	276	#define savestack_ix (thr->Tsavestack_ix)
	277	#define savestack_max (thr->Tsavestack_max)
	278
	279	#define retstack (thr->Tretstack)
	280	#define retstack_ix (thr->Tretstack_ix)
	281	#define retstack_max (thr->Tretstack_max)
	282
	283	#define cxstack (thr->Tcxstack)
	284	#define cxstack_ix (thr->Tcxstack_ix)
	285	#define cxstack_max (thr->Tcxstack_max)
	286
	287	#define curpad (thr->Tcurpad)
	288	#define Sv (thr->TSv)
	289	#define Xpv (thr->TXpv)
96827780	290	#define statbuf (thr->Tstatbuf)
96827780	291	#define timesbuf (thr->Ttimesbuf)
11343788	292	#define defstash (thr->Tdefstash)
11343788	293	#define curstash (thr->Tcurstash)
11343788	294
	295	#define tmps_stack (thr->Ttmps_stack)
	296	#define tmps_ix (thr->Ttmps_ix)
	297	#define tmps_floor (thr->Ttmps_floor)
	298	#define tmps_max (thr->Ttmps_max)
	299
	300	#define in_eval (thr->Tin_eval)
	301	#define restartop (thr->Trestartop)
	302	#define delaymagic (thr->Tdelaymagic)
	303	#define dirty (thr->Tdirty)
	304	#define localizing (thr->Tlocalizing)
	305
	306	#define top_env (thr->Ttop_env)
	307	#define runlevel (thr->Trunlevel)
	308
f93b4edd	309	#define cvcache (thr->Tcvcache)
11343788	310	#endif /* USE_THREADS */