[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.263 by root, Wed Nov 12 04:49:06 2008 UTC vs.
Revision 1.276 by root, Sat Nov 15 07:49:48 2008 UTC

…		…
116	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
117	#endif	117	#endif
118		118
119	/* The next macros try to return the current stack pointer, in an as	119	/* The next macros try to return the current stack pointer, in an as
120	* portable way as possible. */	120	* portable way as possible. */
121	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
122	#define STACKLEVEL ((void *)&stacklevel)	122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
		123	#else
		124	# define dSTACKLEVEL volatile void stacklevel = (volatile void )&stacklevel
		125	#endif
123		126
124	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
125		128
126	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
127	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
128	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
129	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
130	# define INLINE static inline	132	# define INLINE static inline
131	#else	133	#else
132	# define attribute(x)	134	# define attribute(x)
133	# define BARRIER
134	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
135	# define INLINE static	136	# define INLINE static
136	#endif	137	#endif
137		138
138	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
182	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
183	static HV coro_state_stash, coro_stash;	184	static HV coro_state_stash, coro_stash;
184	static volatile SV coro_mortal; / will be freed/thrown after next transfer */	185	static volatile SV coro_mortal; / will be freed/thrown after next transfer */
185	static volatile struct coro *transfer_next;	186	static volatile struct coro *transfer_next;
186		187
187	struct transfer_args
188	{
189	struct coro prev, next;
190	};
191
192	static GV irsgv; / $/ */	188	static GV irsgv; / $/ */
193	static GV stdoutgv; / STDOUT /	189	static GV stdoutgv; / STDOUT /
194	static SV *rv_diehook;	190	static SV *rv_diehook;
195	static SV *rv_warnhook;	191	static SV *rv_warnhook;
196	static HV hv_sig; / %SIG */	192	static HV hv_sig; / %SIG */
…		…
214	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
215	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
216	};	212	};
217		213
218	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
219	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
220	struct coro_cctx *next;	217	struct coro_cctx *next;
221		218
222	/* the stack */	219	/* the stack */
223	void *sptr;	220	void *sptr;
224	size_t ssize;	221	size_t ssize;
…		…
242	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
243	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
244	};	241	};
245		242
246	/* the structure where most of the perl state is stored, overlaid on the cxstack */	243	/* the structure where most of the perl state is stored, overlaid on the cxstack */
247	typedef struct {	244	typedef struct
		245	{
248	SV *defsv;	246	SV *defsv;
249	AV *defav;	247	AV *defav;
250	SV *errsv;	248	SV *errsv;
251	SV *irsgv;	249	SV *irsgv;
252	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
256		254
257	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	255	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
258		256
259	/* this is a structure representing a perl-level coroutine */	257	/* this is a structure representing a perl-level coroutine */
260	struct coro {	258	struct coro {
261	/* the c coroutine allocated to this perl coroutine, if any */	259	/* the C coroutine allocated to this perl coroutine, if any */
262	coro_cctx *cctx;	260	coro_cctx *cctx;
263		261
264	/* process data */	262	/* process data */
		263	struct CoroSLF slf_frame; /* saved slf frame */
265	AV *mainstack;	264	AV *mainstack;
266	perl_slots slot; / basically the saved sp */	265	perl_slots slot; / basically the saved sp */
267		266
268	AV args; / data associated with this coroutine (initial args) */	267	AV args; / data associated with this coroutine (initial args) */
269	int refcnt; /* coroutines are refcounted, yes */	268	int refcnt; /* coroutines are refcounted, yes */
…		…
284	struct coro next, prev;	283	struct coro next, prev;
285	};	284	};
286		285
287	typedef struct coro *Coro__State;	286	typedef struct coro *Coro__State;
288	typedef struct coro *Coro__State_or_hashref;	287	typedef struct coro *Coro__State_or_hashref;
		288
		289	static struct CoroSLF slf_frame; /* the current slf frame */
289		290
290	/ Coro ******************************************************************/	291	/ Coro ******************************************************************/
291		292
292	#define PRIO_MAX 3	293	#define PRIO_MAX 3
293	#define PRIO_HIGH 1	294	#define PRIO_HIGH 1
…		…
298		299
299	/* for Coro.pm */	300	/* for Coro.pm */
300	static SV *coro_current;	301	static SV *coro_current;
301	static SV *coro_readyhook;	302	static SV *coro_readyhook;
302	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
303	static int coro_nready;
304	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
305		306
306	/ lowlevel stuff ********************************************************/	307	/ lowlevel stuff ********************************************************/
307		308
308	static SV *	309	static SV *
309	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
513	CvPADLIST (cv) = (AV *)POPs;	514	CvPADLIST (cv) = (AV *)POPs;
514	}	515	}
515		516
516	PUTBACK;	517	PUTBACK;
517	}	518	}
		519
		520	slf_frame = c->slf_frame;
518	}	521	}
519		522
520	static void	523	static void
521	save_perl (pTHX_ Coro__State c)	524	save_perl (pTHX_ Coro__State c)
522	{	525	{
		526	c->slf_frame = slf_frame;
		527
523	{	528	{
524	dSP;	529	dSP;
525	I32 cxix = cxstack_ix;	530	I32 cxix = cxstack_ix;
526	PERL_CONTEXT *ccstk = cxstack;	531	PERL_CONTEXT *ccstk = cxstack;
527	PERL_SI *top_si = PL_curstackinfo;	532	PERL_SI *top_si = PL_curstackinfo;
…		…
594	#undef VAR	599	#undef VAR
595	}	600	}
596	}	601	}
597		602
598	/*	603	/*
599	* allocate various perl stacks. This is an exact copy	604	* allocate various perl stacks. This is almost an exact copy
600	* of perl.c:init_stacks, except that it uses less memory	605	* of perl.c:init_stacks, except that it uses less memory
601	* on the (sometimes correct) assumption that coroutines do	606	* on the (sometimes correct) assumption that coroutines do
602	* not usually need a lot of stackspace.	607	* not usually need a lot of stackspace.
603	*/	608	*/
604	#if CORO_PREFER_PERL_FUNCTIONS	609	#if CORO_PREFER_PERL_FUNCTIONS
…		…
725	#ifndef MgPV_nolen_const	730	#ifndef MgPV_nolen_const
726	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \	731	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
727	SvPV_nolen((SV*)((mg)->mg_ptr)) : \	732	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
728	(const char*)(mg)->mg_ptr)	733	(const char*)(mg)->mg_ptr)
729	#endif	734	#endif
730
731	/* we sometimes need to create the effect of entersub calling us */
732	#define ENTERSUB_HEAD ENTER; SAVETMPS
733	/* we somtimes need to create the effect of leaving via entersub */
734	#define ENTERSUB_TAIL LEAVE
735		735
736	/*	736	/*
737	* This overrides the default magic get method of %SIG elements.	737	* This overrides the default magic get method of %SIG elements.
738	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook	738	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739	* and instead of tryign to save and restore the hash elements, we just provide	739	* and instead of tryign to save and restore the hash elements, we just provide
…		…
811		811
812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813	}	813	}
814		814
815	static void	815	static void
		816	prepare_nop (aTHX_ struct coro_transfer_args *ta)
		817	{
		818	/* kind of mega-hacky, but works */
		819	ta->next = ta->prev = (struct coro *)ta;
		820	}
		821
		822	static int
		823	slf_check_nop (aTHX)
		824	{
		825	return 0;
		826	}
		827
		828	static void
816	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
817	{	830	{
818	/*	831	/*
819	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
820	*/	833	*/
…		…
859	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
860	SPAGAIN;	873	SPAGAIN;
861	}	874	}
862		875
863	/* this newly created coroutine might be run on an existing cctx which most	876	/* this newly created coroutine might be run on an existing cctx which most
864	* likely was suspended in set_stacklevel, called from entersub.	877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
865	* set_stacklevel doesn't do anything on return, but entersub does LEAVE,
866	* so we ENTER here for symmetry.
867	*/	878	*/
868	ENTERSUB_HEAD;	879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		880	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
869	}	881	}
870		882
871	static void	883	static void
872	coro_destruct (pTHX_ struct coro *coro)	884	coro_destruct (pTHX_ struct coro *coro)
873	{	885	{
…		…
1037	TAINT_NOT;	1049	TAINT_NOT;
1038	return 0;	1050	return 0;
1039	}	1051	}
1040		1052
1041	static void	1053	static void
1042	prepare_set_stacklevel (struct transfer_args ta, struct coro_cctx cctx)	1054	prepare_set_stacklevel (struct coro_transfer_args ta, struct coro_cctx cctx)
1043	{	1055	{
1044	ta->prev = (struct coro *)cctx;	1056	ta->prev = (struct coro *)cctx;
1045	ta->next = 0;	1057	ta->next = 0;
1046	}	1058	}
1047		1059
…		…
1078	INLINE void	1090	INLINE void
1079	transfer_tail (pTHX)	1091	transfer_tail (pTHX)
1080	{	1092	{
1081	struct coro next = (struct coro )transfer_next;	1093	struct coro next = (struct coro )transfer_next;
1082	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */	1094	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1083	assert (("FATAL: transfer_next was zero in transfer_tail (please report)", next));	1095	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1084		1096
1085	free_coro_mortal (aTHX);	1097	free_coro_mortal (aTHX);
1086	UNLOCK;	1098	UNLOCK;
1087		1099
1088	if (expect_false (next->throw))	1100	if (expect_false (next->throw))
…		…
1107	# endif	1119	# endif
1108	#endif	1120	#endif
1109	{	1121	{
1110	dTHX;	1122	dTHX;
1111		1123
1112	/* entersub called ENTER, but we never 'returned', undo that here */	1124	/* normally we would need to skip the entersub here */
1113	ENTERSUB_TAIL;	1125	/* not doing so will re-execute it, which is exactly what we want */
1114
1115	/* we now skip the entersub that did lead to transfer() */
1116	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
1117		1127
1118	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1119	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1120		1130
1121	/* cctx_run is the alternative tail of transfer() */	1131	/* cctx_run is the alternative tail of transfer() */
		1132	/* TODO: throwing an exception here might be deadly, VERIFY */
1122	transfer_tail (aTHX);	1133	transfer_tail (aTHX);
1123		1134
1124	/* somebody or something will hit me for both perl_run and PL_restartop */	1135	/* somebody or something will hit me for both perl_run and PL_restartop */
1125	PL_restartop = PL_op;	1136	PL_restartop = PL_op;
1126	perl_run (PL_curinterp);	1137	perl_run (PL_curinterp);
…		…
1192	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1203	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1193	New (0, cctx->sptr, cctx_stacksize, long);	1204	New (0, cctx->sptr, cctx_stacksize, long);
1194		1205
1195	if (!cctx->sptr)	1206	if (!cctx->sptr)
1196	{	1207	{
1197	perror ("FATAL: unable to allocate stack for coroutine");	1208	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1198	_exit (EXIT_FAILURE);	1209	_exit (EXIT_FAILURE);
1199	}	1210	}
1200		1211
1201	stack_start = cctx->sptr;	1212	stack_start = cctx->sptr;
1202	stack_size = cctx->ssize;	1213	stack_size = cctx->ssize;
…		…
1285	transfer_check (pTHX_ struct coro prev, struct coro next)	1296	transfer_check (pTHX_ struct coro prev, struct coro next)
1286	{	1297	{
1287	if (expect_true (prev != next))	1298	if (expect_true (prev != next))
1288	{	1299	{
1289	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))	1300	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
1290	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1301	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1291		1302
1292	if (expect_false (next->flags & CF_RUNNING))	1303	if (expect_false (next->flags & CF_RUNNING))
1293	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1304	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1294		1305
1295	if (expect_false (next->flags & CF_DESTROYED))	1306	if (expect_false (next->flags & CF_DESTROYED))
1296	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1307	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1297		1308
1298	#if !PERL_VERSION_ATLEAST (5,10,0)	1309	#if !PERL_VERSION_ATLEAST (5,10,0)
1299	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1310	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1300	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1311	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1301	#endif	1312	#endif
1302	}	1313	}
1303	}	1314	}
1304		1315
1305	/* always use the TRANSFER macro */	1316	/* always use the TRANSFER macro */
…		…
1309	dSTACKLEVEL;	1320	dSTACKLEVEL;
1310		1321
1311	/* sometimes transfer is only called to set idle_sp */	1322	/* sometimes transfer is only called to set idle_sp */
1312	if (expect_false (!next))	1323	if (expect_false (!next))
1313	{	1324	{
1314	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1325	((coro_cctx *)prev)->idle_sp = stacklevel;
1315	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */	1326	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
1316	}	1327	}
1317	else if (expect_true (prev != next))	1328	else if (expect_true (prev != next))
1318	{	1329	{
1319	coro_cctx *prev__cctx;	1330	coro_cctx *prev__cctx;
…		…
1346		1357
1347	prev__cctx = prev->cctx;	1358	prev__cctx = prev->cctx;
1348		1359
1349	/* possibly untie and reuse the cctx */	1360	/* possibly untie and reuse the cctx */
1350	if (expect_true (	1361	if (expect_true (
1351	prev__cctx->idle_sp == STACKLEVEL	1362	prev__cctx->idle_sp == stacklevel
1352	&& !(prev__cctx->flags & CC_TRACE)	1363	&& !(prev__cctx->flags & CC_TRACE)
1353	&& !force_cctx	1364	&& !force_cctx
1354	))	1365	))
1355	{	1366	{
1356	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1367	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1357	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));	1368	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1358		1369
1359	prev->cctx = 0;	1370	prev->cctx = 0;
1360		1371
1361	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1372	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
…		…
1412		1423
1413	if (coro->mainstack && coro->mainstack != main_mainstack)	1424	if (coro->mainstack && coro->mainstack != main_mainstack)
1414	{	1425	{
1415	struct coro temp;	1426	struct coro temp;
1416		1427
1417	if (coro->flags & CF_RUNNING)	1428	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1418	croak ("FATAL: tried to destroy currently running coroutine");
1419		1429
1420	save_perl (aTHX_ &temp);	1430	save_perl (aTHX_ &temp);
1421	load_perl (aTHX_ coro);	1431	load_perl (aTHX_ coro);
1422		1432
1423	coro_destruct (aTHX_ coro);	1433	coro_destruct (aTHX_ coro);
…		…
1474	# define MGf_DUP 0	1484	# define MGf_DUP 0
1475	#endif	1485	#endif
1476	};	1486	};
1477		1487
1478	static void	1488	static void
1479	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)	1489	prepare_transfer (pTHX_ struct coro_transfer_args ta, SV prev_sv, SV *next_sv)
1480	{	1490	{
1481	ta->prev = SvSTATE (prev_sv);	1491	ta->prev = SvSTATE (prev_sv);
1482	ta->next = SvSTATE (next_sv);	1492	ta->next = SvSTATE (next_sv);
1483	TRANSFER_CHECK (*ta);	1493	TRANSFER_CHECK (*ta);
1484	}	1494	}
1485		1495
1486	static void	1496	static void
1487	api_transfer (SV prev_sv, SV next_sv)	1497	api_transfer (pTHX_ SV prev_sv, SV next_sv)
1488	{	1498	{
1489	dTHX;
1490	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1491		1500
1492	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1493	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1494	}	1503	}
1495		1504
…		…
1512		1521
1513	return 0;	1522	return 0;
1514	}	1523	}
1515		1524
1516	static int	1525	static int
1517	api_ready (SV *coro_sv)	1526	api_ready (pTHX_ SV *coro_sv)
1518	{	1527	{
1519	dTHX;
1520	struct coro *coro;	1528	struct coro *coro;
1521	SV *sv_hook;	1529	SV *sv_hook;
1522	void (*xs_hook)(void);	1530	void (*xs_hook)(void);
1523		1531
1524	if (SvROK (coro_sv))	1532	if (SvROK (coro_sv))
…		…
1562		1570
1563	return 1;	1571	return 1;
1564	}	1572	}
1565		1573
1566	static int	1574	static int
1567	api_is_ready (SV *coro_sv)	1575	api_is_ready (pTHX_ SV *coro_sv)
1568	{	1576	{
1569	dTHX;
1570
1571	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1572	}	1578	}
1573		1579
1574	INLINE void	1580	INLINE void
1575	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1576	{	1582	{
1577	SV prev_sv, next_sv;	1583	SV prev_sv, next_sv;
1578		1584
1579	for (;;)	1585	for (;;)
1580	{	1586	{
…		…
1629	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1630	UNLOCK;	1636	UNLOCK;
1631	}	1637	}
1632		1638
1633	INLINE void	1639	INLINE void
1634	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1635	{	1641	{
1636	api_ready (coro_current);	1642	api_ready (aTHX_ coro_current);
1637	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1638	}	1644	}
1639		1645
		1646	INLINE void
		1647	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1648	{
		1649	SV *prev = SvRV (coro_current);
		1650
		1651	if (coro_nready)
		1652	{
		1653	prepare_schedule (aTHX_ ta);
		1654	api_ready (aTHX_ prev);
		1655	}
		1656	else
		1657	prepare_nop (aTHX_ ta);
		1658	}
		1659
		1660	static void
		1661	api_schedule (pTHX)
		1662	{
		1663	struct coro_transfer_args ta;
		1664
		1665	prepare_schedule (aTHX_ &ta);
		1666	TRANSFER (ta, 1);
		1667	}
		1668
1640	static int	1669	static int
1641	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1670	api_cede (pTHX)
1642	{	1671	{
1643	if (coro_nready)	1672	struct coro_transfer_args ta;
1644	{	1673
1645	SV *prev = SvRV (coro_current);
1646	prepare_schedule (aTHX_ ta);	1674	prepare_cede (aTHX_ &ta);
1647	api_ready (prev);	1675
		1676	if (expect_true (ta.prev != ta.next))
		1677	{
		1678	TRANSFER (ta, 1);
1648	return 1;	1679	return 1;
1649	}	1680	}
1650	else	1681	else
1651	return 0;	1682	return 0;
1652	}	1683	}
1653		1684
1654	static void
1655	api_schedule (void)
1656	{
1657	dTHX;
1658	struct transfer_args ta;
1659
1660	prepare_schedule (aTHX_ &ta);
1661	TRANSFER (ta, 1);
1662	}
1663
1664	static int	1685	static int
1665	api_cede (void)	1686	api_cede_notself (pTHX)
1666	{	1687	{
1667	dTHX;	1688	if (coro_nready)
		1689	{
1668	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1669		1691
1670	prepare_cede (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1671
1672	if (expect_true (ta.prev != ta.next))
1673	{
1674	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1675	return 1;	1694	return 1;
1676	}	1695	}
1677	else	1696	else
1678	return 0;	1697	return 0;
1679	}	1698	}
1680		1699
1681	static int	1700	static void
1682	api_cede_notself (void)
1683	{
1684	dTHX;
1685	struct transfer_args ta;
1686
1687	if (prepare_cede_notself (aTHX_ &ta))
1688	{
1689	TRANSFER (ta, 1);
1690	return 1;
1691	}
1692	else
1693	return 0;
1694	}
1695
1696	static void
1697	api_trace (SV *coro_sv, int flags)	1701	api_trace (pTHX_ SV *coro_sv, int flags)
1698	{	1702	{
1699	dTHX;
1700	struct coro *coro = SvSTATE (coro_sv);	1703	struct coro *coro = SvSTATE (coro_sv);
1701		1704
1702	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1703	{	1706	{
1704	if (!coro->cctx)	1707	if (!coro->cctx)
1705	coro->cctx = cctx_new_run ();	1708	coro->cctx = cctx_new_run ();
1706	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1707	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1708		1711
1709	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));	1712	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
1710	}	1713	}
1711	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1712	{	1715	{
…		…
1771	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1774	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1772	double now = nvtime ();	1775	double now = nvtime ();
1773		1776
1774	if (now >= self->next)	1777	if (now >= self->next)
1775	{	1778	{
1776	api_cede ();	1779	api_cede (aTHX);
1777	self->next = now + self->every;	1780	self->next = now + self->every;
1778	}	1781	}
1779		1782
1780	return PerlIOBuf_flush (aTHX_ f);	1783	return PerlIOBuf_flush (aTHX_ f);
1781	}	1784	}
…		…
1810	PerlIOBuf_get_ptr,	1813	PerlIOBuf_get_ptr,
1811	PerlIOBuf_get_cnt,	1814	PerlIOBuf_get_cnt,
1812	PerlIOBuf_set_ptrcnt,	1815	PerlIOBuf_set_ptrcnt,
1813	};	1816	};
1814		1817
		1818	/*****************************************************************************/
		1819
		1820	static const CV slf_cv; / for quick consistency check */
		1821
		1822	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1823	static SV *slf_arg0;
		1824	static SV *slf_arg1;
		1825	static SV *slf_arg2;
		1826
		1827	/* this restores the stack in the case we patched the entersub, to */
		1828	/* recreate the stack frame as perl will on following calls */
		1829	/* since entersub cleared the stack */
		1830	static OP *
		1831	pp_restore (pTHX)
		1832	{
		1833	dSP;
		1834
		1835	PUSHMARK (SP);
		1836
		1837	EXTEND (SP, 3);
		1838	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1839	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1840	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1841	PUSHs ((SV *)CvGV (slf_cv));
		1842
		1843	RETURNOP (slf_restore.op_first);
		1844	}
		1845
		1846	static void
		1847	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1848	{
		1849	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1850	}
		1851
		1852	static void
		1853	slf_init_set_stacklevel (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1854	{
		1855	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1856
		1857	frame->prepare = slf_prepare_set_stacklevel;
		1858	frame->check = slf_check_nop;
		1859	frame->data = (void *)SvIV (arg [0]);
		1860	}
		1861
		1862	static void
		1863	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1864	{
		1865	SV arg = (SV )slf_frame.data;
		1866
		1867	prepare_transfer (ta, arg [0], arg [1]);
		1868	}
		1869
		1870	static void
		1871	slf_init_transfer (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1872	{
		1873	if (items != 2)
		1874	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1875
		1876	frame->prepare = slf_prepare_transfer;
		1877	frame->check = slf_check_nop;
		1878	frame->data = (void )arg; / let's hope it will stay valid */
		1879	}
		1880
		1881	static void
		1882	slf_init_schedule (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1883	{
		1884	frame->prepare = prepare_schedule;
		1885	frame->check = slf_check_nop;
		1886	}
		1887
		1888	static void
		1889	slf_init_cede (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1890	{
		1891	frame->prepare = prepare_cede;
		1892	frame->check = slf_check_nop;
		1893	}
		1894
		1895	static void
		1896	slf_init_cede_notself (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1897	{
		1898	frame->prepare = prepare_cede_notself;
		1899	frame->check = slf_check_nop;
		1900	}
		1901
		1902	/* we hijack an hopefully unused CV flag for our purposes */
		1903	#define CVf_SLF 0x4000
		1904
		1905	/*
		1906	* these not obviously related functions are all rolled into one
		1907	* function to increase chances that they all will call transfer with the same
		1908	* stack offset
		1909	* SLF stands for "schedule-like-function".
		1910	*/
		1911	static OP *
		1912	pp_slf (pTHX)
		1913	{
		1914	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1915
		1916	/* set up the slf frame, unless it has already been set-up */
		1917	/* the latter happens when a new coro has been started */
		1918	/* or when a new cctx was attached to an existing coroutine */
		1919	if (expect_true (!slf_frame.prepare))
		1920	{
		1921	/* first iteration */
		1922	dSP;
		1923	SV **arg = PL_stack_base + TOPMARK + 1;
		1924	int items = SP - arg; /* args without function object */
		1925	SV gv = sp;
		1926
		1927	/* do a quick consistency check on the "function" object, and if it isn't */
		1928	/* for us, divert to the real entersub */
		1929	if (SvTYPE (gv) != SVt_PVGV \|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1930	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1931
		1932	/* pop args */
		1933	SP = PL_stack_base + POPMARK;
		1934
		1935	if (!(PL_op->op_flags & OPf_STACKED))
		1936	{
		1937	/* ampersand-form of call, use @_ instead of stack */
		1938	AV *av = GvAV (PL_defgv);
		1939	arg = AvARRAY (av);
		1940	items = AvFILLp (av) + 1;
		1941	}
		1942
		1943	PUTBACK;
		1944
		1945	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
		1946	}
		1947
		1948	/* now interpret the slf_frame */
		1949	/* we use a callback system not to make the code needlessly */
		1950	/* complicated, but so we can run multiple perl coros from one cctx */
		1951
		1952	do
		1953	{
		1954	struct coro_transfer_args ta;
		1955
		1956	slf_frame.prepare (aTHX_ &ta);
		1957	TRANSFER (ta, 0);
		1958
		1959	checkmark = PL_stack_sp - PL_stack_base;
		1960	}
		1961	while (slf_frame.check (aTHX_ &slf_frame));
		1962
		1963	{
		1964	dSP;
		1965	SV **bot = PL_stack_base + checkmark;
		1966	int gimme = GIMME_V;
		1967
		1968	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
		1969
		1970	/* make sure we put something on the stack in scalar context */
		1971	if (gimme == G_SCALAR)
		1972	{
		1973	if (sp == bot)
		1974	XPUSHs (&PL_sv_undef);
		1975
		1976	SP = bot + 1;
		1977	}
		1978
		1979	PUTBACK;
		1980	}
		1981
		1982	return NORMAL;
		1983	}
		1984
		1985	static void
		1986	api_execute_slf (pTHX_ CV cv, coro_slf_cb init_cb, SV *arg, int items)
		1987	{
		1988	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1989
		1990	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1991	&& PL_op->op_ppaddr != pp_slf)
		1992	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1993
		1994	if (items > 3)
		1995	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
		1996
		1997	CvFLAGS (cv) \|= CVf_SLF;
		1998	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1999	slf_cv = cv;
		2000
		2001	/* we patch the op, and then re-run the whole call */
		2002	/* we have to put the same argument on the stack for this to work */
		2003	/* and this will be done by pp_restore */
		2004	slf_restore.op_next = (OP *)&slf_restore;
		2005	slf_restore.op_type = OP_NULL;
		2006	slf_restore.op_ppaddr = pp_restore;
		2007	slf_restore.op_first = PL_op;
		2008
		2009	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		2010	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		2011	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
		2012
		2013	PL_op->op_ppaddr = pp_slf;
		2014
		2015	PL_op = (OP *)&slf_restore;
		2016	}
		2017
		2018	/*****************************************************************************/
		2019
		2020	static int
		2021	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2022	{
		2023	AV av = (AV )frame->data;
		2024	SV *count_sv = AvARRAY (av)[0];
		2025
		2026	if (SvIVX (count_sv) > 0)
		2027	{
		2028	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2029	return 0;
		2030	}
		2031	else
		2032	{
		2033	int i;
		2034	/* if we were woken up but can't down, we look through the whole */
		2035	/* waiters list and only add us if we aren't in there already */
		2036	/* this avoids some degenerate memory usage cases */
		2037
		2038	for (i = 1; i <= AvFILLp (av); ++i)
		2039	if (AvARRAY (av)[i] == SvRV (coro_current))
		2040	return 1;
		2041
		2042	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2043	return 1;
		2044	}
		2045	}
		2046
		2047	static void
		2048	slf_init_semaphore_down (pTHX_ struct CoroSLF frame, SV *arg, int items)
		2049	{
		2050	AV av = (AV )SvRV (arg [0]);
		2051
		2052	if (SvIVX (AvARRAY (av)[0]) > 0)
		2053	{
		2054	frame->data = (void *)av;
		2055	frame->prepare = prepare_nop;
		2056	}
		2057	else
		2058	{
		2059	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2060
		2061	frame->data = (void )sv_2mortal (SvREFCNT_inc ((SV )av));
		2062	frame->prepare = prepare_schedule;
		2063	}
		2064
		2065	frame->check = slf_check_semaphore_down;
		2066
		2067	}
1815		2068
1816	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2069	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1817		2070
1818	PROTOTYPES: DISABLE	2071	PROTOTYPES: DISABLE
1819		2072
…		…
1849	main_top_env = PL_top_env;	2102	main_top_env = PL_top_env;
1850		2103
1851	while (main_top_env->je_prev)	2104	while (main_top_env->je_prev)
1852	main_top_env = main_top_env->je_prev;	2105	main_top_env = main_top_env->je_prev;
1853		2106
1854	coroapi.ver = CORO_API_VERSION;	2107	coroapi.ver = CORO_API_VERSION;
1855	coroapi.rev = CORO_API_REVISION;	2108	coroapi.rev = CORO_API_REVISION;
		2109
1856	coroapi.transfer = api_transfer;	2110	coroapi.transfer = api_transfer;
		2111
		2112	coroapi.sv_state = SvSTATE_;
		2113	coroapi.execute_slf = api_execute_slf;
		2114	coroapi.prepare_nop = prepare_nop;
		2115	coroapi.prepare_schedule = prepare_schedule;
		2116	coroapi.prepare_cede = prepare_cede;
		2117	coroapi.prepare_cede_notself = prepare_cede_notself;
1857		2118
1858	{	2119	{
1859	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2120	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1860		2121
1861	if (!svp) croak ("Time::HiRes is required");	2122	if (!svp) croak ("Time::HiRes is required");
…		…
1894	av_push (coro->args, newSVsv (ST (i)));	2155	av_push (coro->args, newSVsv (ST (i)));
1895	}	2156	}
1896	OUTPUT:	2157	OUTPUT:
1897	RETVAL	2158	RETVAL
1898		2159
1899	# these not obviously related functions are all rolled into the same xs
1900	# function to increase chances that they all will call transfer with the same
1901	# stack offset
1902	void	2160	void
1903	_set_stacklevel (...)	2161	_set_stacklevel (...)
1904	ALIAS:	2162	CODE:
1905	Coro::State::transfer = 1	2163	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1906	Coro::schedule = 2
1907	Coro::cede = 3
1908	Coro::cede_notself = 4
1909	CODE:
1910	{
1911	struct transfer_args ta;
1912		2164
1913	PUTBACK;	2165	void
1914	switch (ix)	2166	transfer (...)
1915	{	2167	PROTOTYPE: $$
1916	case 0:	2168	CODE:
1917	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (ST (0)));	2169	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1918	break;
1919
1920	case 1:
1921	if (items != 2)
1922	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1923
1924	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1925	break;
1926
1927	case 2:
1928	prepare_schedule (aTHX_ &ta);
1929	break;
1930
1931	case 3:
1932	prepare_cede (aTHX_ &ta);
1933	break;
1934
1935	case 4:
1936	if (!prepare_cede_notself (aTHX_ &ta))
1937	XSRETURN_EMPTY;
1938
1939	break;
1940	}
1941	SPAGAIN;
1942
1943	BARRIER;
1944	PUTBACK;
1945	TRANSFER (ta, 0);
1946	SPAGAIN; /* might be the sp of a different coroutine now */
1947	/* be extra careful not to ever do anything after TRANSFER */
1948	}
1949		2170
1950	bool	2171	bool
1951	_destroy (SV *coro_sv)	2172	_destroy (SV *coro_sv)
1952	CODE:	2173	CODE:
1953	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2174	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1960	CODE:	2181	CODE:
1961	_exit (code);	2182	_exit (code);
1962		2183
1963	int	2184	int
1964	cctx_stacksize (int new_stacksize = 0)	2185	cctx_stacksize (int new_stacksize = 0)
		2186	PROTOTYPE: ;$
1965	CODE:	2187	CODE:
1966	RETVAL = cctx_stacksize;	2188	RETVAL = cctx_stacksize;
1967	if (new_stacksize)	2189	if (new_stacksize)
1968	{	2190	{
1969	cctx_stacksize = new_stacksize;	2191	cctx_stacksize = new_stacksize;
…		…
1972	OUTPUT:	2194	OUTPUT:
1973	RETVAL	2195	RETVAL
1974		2196
1975	int	2197	int
1976	cctx_max_idle (int max_idle = 0)	2198	cctx_max_idle (int max_idle = 0)
		2199	PROTOTYPE: ;$
1977	CODE:	2200	CODE:
1978	RETVAL = cctx_max_idle;	2201	RETVAL = cctx_max_idle;
1979	if (max_idle > 1)	2202	if (max_idle > 1)
1980	cctx_max_idle = max_idle;	2203	cctx_max_idle = max_idle;
1981	OUTPUT:	2204	OUTPUT:
1982	RETVAL	2205	RETVAL
1983		2206
1984	int	2207	int
1985	cctx_count ()	2208	cctx_count ()
		2209	PROTOTYPE:
1986	CODE:	2210	CODE:
1987	RETVAL = cctx_count;	2211	RETVAL = cctx_count;
1988	OUTPUT:	2212	OUTPUT:
1989	RETVAL	2213	RETVAL
1990		2214
1991	int	2215	int
1992	cctx_idle ()	2216	cctx_idle ()
		2217	PROTOTYPE:
1993	CODE:	2218	CODE:
1994	RETVAL = cctx_idle;	2219	RETVAL = cctx_idle;
1995	OUTPUT:	2220	OUTPUT:
1996	RETVAL	2221	RETVAL
1997		2222
1998	void	2223	void
1999	list ()	2224	list ()
		2225	PROTOTYPE:
2000	PPCODE:	2226	PPCODE:
2001	{	2227	{
2002	struct coro *coro;	2228	struct coro *coro;
2003	for (coro = coro_first; coro; coro = coro->next)	2229	for (coro = coro_first; coro; coro = coro->next)
2004	if (coro->hv)	2230	if (coro->hv)
…		…
2071	SvREFCNT_dec (self->throw);	2297	SvREFCNT_dec (self->throw);
2072	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2298	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2073		2299
2074	void	2300	void
2075	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2301	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		2302	PROTOTYPE: $;$
		2303	C_ARGS: aTHX_ coro, flags
2076		2304
2077	SV *	2305	SV *
2078	has_cctx (Coro::State coro)	2306	has_cctx (Coro::State coro)
2079	PROTOTYPE: $	2307	PROTOTYPE: $
2080	CODE:	2308	CODE:
…		…
2104	OUTPUT:	2332	OUTPUT:
2105	RETVAL	2333	RETVAL
2106		2334
2107	void	2335	void
2108	force_cctx ()	2336	force_cctx ()
		2337	PROTOTYPE:
2109	CODE:	2338	CODE:
2110	struct coro *coro = SvSTATE (coro_current);	2339	struct coro *coro = SvSTATE (coro_current);
2111	coro->cctx->idle_sp = 0;	2340	coro->cctx->idle_sp = 0;
2112		2341
2113	void	2342	void
…		…
2115	PROTOTYPE: $	2344	PROTOTYPE: $
2116	ALIAS:	2345	ALIAS:
2117	swap_defav = 1	2346	swap_defav = 1
2118	CODE:	2347	CODE:
2119	if (!self->slot)	2348	if (!self->slot)
2120	croak ("cannot swap state with coroutine that has no saved state");	2349	croak ("cannot swap state with coroutine that has no saved state,");
2121	else	2350	else
2122	{	2351	{
2123	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);	2352	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
2124	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;	2353	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
2125		2354
…		…
2157	coroapi.schedule = api_schedule;	2386	coroapi.schedule = api_schedule;
2158	coroapi.cede = api_cede;	2387	coroapi.cede = api_cede;
2159	coroapi.cede_notself = api_cede_notself;	2388	coroapi.cede_notself = api_cede_notself;
2160	coroapi.ready = api_ready;	2389	coroapi.ready = api_ready;
2161	coroapi.is_ready = api_is_ready;	2390	coroapi.is_ready = api_is_ready;
2162	coroapi.nready = &coro_nready;	2391	coroapi.nready = coro_nready;
2163	coroapi.current = coro_current;	2392	coroapi.current = coro_current;
2164		2393
2165	GCoroAPI = &coroapi;	2394	GCoroAPI = &coroapi;
2166	sv_setiv (sv, (IV)&coroapi);	2395	sv_setiv (sv, (IV)&coroapi);
2167	SvREADONLY_on (sv);	2396	SvREADONLY_on (sv);
2168	}	2397	}
2169	}	2398	}
		2399
		2400	void
		2401	schedule (...)
		2402	CODE:
		2403	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
		2404
		2405	void
		2406	cede (...)
		2407	CODE:
		2408	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
		2409
		2410	void
		2411	cede_notself (...)
		2412	CODE:
		2413	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2170		2414
2171	void	2415	void
2172	_set_current (SV *current)	2416	_set_current (SV *current)
2173	PROTOTYPE: $	2417	PROTOTYPE: $
2174	CODE:	2418	CODE:
…		…
2184	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2428	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2185	UNLOCK;	2429	UNLOCK;
2186		2430
2187	int	2431	int
2188	prio (Coro::State coro, int newprio = 0)	2432	prio (Coro::State coro, int newprio = 0)
		2433	PROTOTYPE: $;$
2189	ALIAS:	2434	ALIAS:
2190	nice = 1	2435	nice = 1
2191	CODE:	2436	CODE:
2192	{	2437	{
2193	RETVAL = coro->prio;	2438	RETVAL = coro->prio;
…		…
2208		2453
2209	SV *	2454	SV *
2210	ready (SV *self)	2455	ready (SV *self)
2211	PROTOTYPE: $	2456	PROTOTYPE: $
2212	CODE:	2457	CODE:
2213	RETVAL = boolSV (api_ready (self));	2458	RETVAL = boolSV (api_ready (aTHX_ self));
2214	OUTPUT:	2459	OUTPUT:
2215	RETVAL	2460	RETVAL
2216		2461
2217	int	2462	int
2218	nready (...)	2463	nready (...)
…		…
2257	{	2502	{
2258	av_fill (defav, len - 1);	2503	av_fill (defav, len - 1);
2259	for (i = 0; i < len; ++i)	2504	for (i = 0; i < len; ++i)
2260	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2505	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2261	}	2506	}
2262
2263	SvREFCNT_dec (invoke);
2264	}	2507	}
2265		2508
2266	void	2509	void
2267	_pool_2 (SV *cb)	2510	_pool_2 (SV *cb)
2268	CODE:	2511	CODE:
…		…
2288	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2531	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2289		2532
2290	coro->prio = 0;	2533	coro->prio = 0;
2291		2534
2292	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2535	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2293	api_trace (coro_current, 0);	2536	api_trace (aTHX_ coro_current, 0);
2294		2537
2295	av_push (av_async_pool, newSVsv (coro_current));	2538	av_push (av_async_pool, newSVsv (coro_current));
2296	}	2539	}
2297		2540
2298	#if 0	2541	#if 0
…		…
2346		2589
2347	MODULE = Coro::State PACKAGE = Coro::AIO	2590	MODULE = Coro::State PACKAGE = Coro::AIO
2348		2591
2349	void	2592	void
2350	_get_state (SV *self)	2593	_get_state (SV *self)
		2594	PROTOTYPE: $
2351	PPCODE:	2595	PPCODE:
2352	{	2596	{
2353	AV *defav = GvAV (PL_defgv);	2597	AV *defav = GvAV (PL_defgv);
2354	AV *av = newAV ();	2598	AV *av = newAV ();
2355	int i;	2599	int i;
…		…
2370		2614
2371	av_push (av, data_sv);	2615	av_push (av, data_sv);
2372		2616
2373	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2617	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2374		2618
2375	api_ready (self);	2619	api_ready (aTHX_ self);
2376	}	2620	}
2377		2621
2378	void	2622	void
2379	_set_state (SV *state)	2623	_set_state (SV *state)
2380	PROTOTYPE: $	2624	PROTOTYPE: $
…		…
2400	BOOT:	2644	BOOT:
2401	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2645	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2402		2646
2403	SV *	2647	SV *
2404	_schedule (...)	2648	_schedule (...)
2405	PROTOTYPE: @
2406	CODE:	2649	CODE:
2407	{	2650	{
2408	static int incede;	2651	static int incede;
2409		2652
2410	api_cede_notself ();	2653	api_cede_notself (aTHX);
2411		2654
2412	++incede;	2655	++incede;
2413	while (coro_nready >= incede && api_cede ())	2656	while (coro_nready >= incede && api_cede (aTHX))
2414	;	2657	;
2415		2658
2416	sv_setsv (sv_activity, &PL_sv_undef);	2659	sv_setsv (sv_activity, &PL_sv_undef);
2417	if (coro_nready >= incede)	2660	if (coro_nready >= incede)
2418	{	2661	{
…		…
2429	MODULE = Coro::State PACKAGE = PerlIO::cede	2672	MODULE = Coro::State PACKAGE = PerlIO::cede
2430		2673
2431	BOOT:	2674	BOOT:
2432	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2675	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2433		2676
		2677	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2678
		2679	SV *
		2680	new (SV klass, SV count_ = 0)
		2681	CODE:
		2682	{
		2683	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2684	AV *av = newAV ();
		2685	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2686	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2687	}
		2688	OUTPUT:
		2689	RETVAL
		2690
		2691	SV *
		2692	count (SV *self)
		2693	CODE:
		2694	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2695	OUTPUT:
		2696	RETVAL
		2697
		2698	void
		2699	up (SV *self, int adjust = 1)
		2700	ALIAS:
		2701	adjust = 1
		2702	CODE:
		2703	{
		2704	AV av = (AV )SvRV (self);
		2705	SV *count_sv = AvARRAY (av)[0];
		2706	IV count = SvIVX (count_sv);
		2707
		2708	count += ix ? adjust : 1;
		2709	SvIVX (count_sv) = count;
		2710
		2711	/* now wake up as many waiters as possible */
		2712	while (count > 0 && AvFILLp (av) >= count)
		2713	{
		2714	SV *cb;
		2715
		2716	/* swap first two elements so we can shift a waiter */
		2717	AvARRAY (av)[0] = AvARRAY (av)[1];
		2718	AvARRAY (av)[1] = count_sv;
		2719	cb = av_shift (av);
		2720
		2721	if (SvOBJECT (cb))
		2722	api_ready (cb);
		2723	else
		2724	croak ("callbacks not yet supported");
		2725
		2726	SvREFCNT_dec (cb);
		2727	}
		2728	}
		2729
		2730	void
		2731	down (SV *self)
		2732	CODE:
		2733	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
		2734
		2735	void
		2736	try (SV *self)
		2737	PPCODE:
		2738	{
		2739	AV av = (AV )SvRV (self);
		2740	SV *count_sv = AvARRAY (av)[0];
		2741	IV count = SvIVX (count_sv);
		2742
		2743	if (count > 0)
		2744	{
		2745	--count;
		2746	SvIVX (count_sv) = count;
		2747	XSRETURN_YES;
		2748	}
		2749	else
		2750	XSRETURN_NO;
		2751	}
		2752
		2753	void
		2754	waiters (SV *self)
		2755	CODE:
		2756	{
		2757	AV av = (AV )SvRV (self);
		2758
		2759	if (GIMME_V == G_SCALAR)
		2760	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2761	else
		2762	{
		2763	int i;
		2764	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2765	for (i = 1; i <= AvFILLp (av); ++i)
		2766	PUSHs (newSVsv (AvARRAY (av)[i]));
		2767	}
		2768	}
		2769

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Comparing Coro/Coro/State.xs (file contents): Revision 1.263 by root, Wed Nov 12 04:49:06 2008 UTC vs. Revision 1.276 by root, Sat Nov 15 07:49:48 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.263 by root, Wed Nov 12 04:49:06 2008 UTC vs.
Revision 1.276 by root, Sat Nov 15 07:49:48 2008 UTC