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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.271 by root, Fri Nov 14 07:35:32 2008 UTC vs.
Revision 1.277 by root, Sat Nov 15 18:40:55 2008 UTC

…		…
183	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
184	static HV coro_state_stash, coro_stash;	184	static HV coro_state_stash, coro_stash;
185	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 */
186	static volatile struct coro *transfer_next;	186	static volatile struct coro *transfer_next;
187		187
188	struct transfer_args
189	{
190	struct coro prev, next;
191	};
192
193	static GV irsgv; / $/ */	188	static GV irsgv; / $/ */
194	static GV stdoutgv; / STDOUT /	189	static GV stdoutgv; / STDOUT /
195	static SV *rv_diehook;	190	static SV *rv_diehook;
196	static SV *rv_warnhook;	191	static SV *rv_warnhook;
197	static HV hv_sig; / %SIG */	192	static HV hv_sig; / %SIG */
…		…
215	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
216	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
217	};	212	};
218		213
219	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
220	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
221	struct coro_cctx *next;	217	struct coro_cctx *next;
222		218
223	/* the stack */	219	/* the stack */
224	void *sptr;	220	void *sptr;
225	size_t ssize;	221	size_t ssize;
…		…
243	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
244	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
245	};	241	};
246		242
247	/* 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 */
248	typedef struct {	244	typedef struct
		245	{
249	SV *defsv;	246	SV *defsv;
250	AV *defav;	247	AV *defav;
251	SV *errsv;	248	SV *errsv;
252	SV *irsgv;	249	SV *irsgv;
253	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
257		254
258	#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))
259		256
260	/* this is a structure representing a perl-level coroutine */	257	/* this is a structure representing a perl-level coroutine */
261	struct coro {	258	struct coro {
262	/* the c coroutine allocated to this perl coroutine, if any */	259	/* the C coroutine allocated to this perl coroutine, if any */
263	coro_cctx *cctx;	260	coro_cctx *cctx;
264		261
265	/* process data */	262	/* process data */
		263	struct CoroSLF slf_frame; /* saved slf frame */
266	AV *mainstack;	264	AV *mainstack;
267	perl_slots slot; / basically the saved sp */	265	perl_slots slot; / basically the saved sp */
268		266
269	AV args; / data associated with this coroutine (initial args) */	267	AV args; / data associated with this coroutine (initial args) */
270	int refcnt; /* coroutines are refcounted, yes */	268	int refcnt; /* coroutines are refcounted, yes */
…		…
285	struct coro next, prev;	283	struct coro next, prev;
286	};	284	};
287		285
288	typedef struct coro *Coro__State;	286	typedef struct coro *Coro__State;
289	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 */
290		290
291	/ Coro ******************************************************************/	291	/ Coro ******************************************************************/
292		292
293	#define PRIO_MAX 3	293	#define PRIO_MAX 3
294	#define PRIO_HIGH 1	294	#define PRIO_HIGH 1
…		…
514	CvPADLIST (cv) = (AV *)POPs;	514	CvPADLIST (cv) = (AV *)POPs;
515	}	515	}
516		516
517	PUTBACK;	517	PUTBACK;
518	}	518	}
		519
		520	slf_frame = c->slf_frame;
519	}	521	}
520		522
521	static void	523	static void
522	save_perl (pTHX_ Coro__State c)	524	save_perl (pTHX_ Coro__State c)
523	{	525	{
		526	c->slf_frame = slf_frame;
		527
524	{	528	{
525	dSP;	529	dSP;
526	I32 cxix = cxstack_ix;	530	I32 cxix = cxstack_ix;
527	PERL_CONTEXT *ccstk = cxstack;	531	PERL_CONTEXT *ccstk = cxstack;
528	PERL_SI *top_si = PL_curstackinfo;	532	PERL_SI *top_si = PL_curstackinfo;
…		…
595	#undef VAR	599	#undef VAR
596	}	600	}
597	}	601	}
598		602
599	/*	603	/*
600	* allocate various perl stacks. This is an exact copy	604	* allocate various perl stacks. This is almost an exact copy
601	* of perl.c:init_stacks, except that it uses less memory	605	* of perl.c:init_stacks, except that it uses less memory
602	* on the (sometimes correct) assumption that coroutines do	606	* on the (sometimes correct) assumption that coroutines do
603	* not usually need a lot of stackspace.	607	* not usually need a lot of stackspace.
604	*/	608	*/
605	#if CORO_PREFER_PERL_FUNCTIONS	609	#if CORO_PREFER_PERL_FUNCTIONS
…		…
712	#endif	716	#endif
713	}	717	}
714	}	718	}
715		719
716	return rss;	720	return rss;
717	}
718
719	/ set stacklevel support ************************************************/
720
721	/* we sometimes need to create the effect of pp_slf calling us */
722	#define SLF_HEAD (void)0
723	/* we sometimes need to create the effect of leaving via pp_slf */
724	#define SLF_TAIL slf_tail (aTHX)
725
726	INLINE void
727	slf_tail (pTHX)
728	{
729	dSP;
730	SV **bot = SP;
731
732	int gimme = GIMME_V;
733
734	/* make sure we put something on the stack in scalar context */
735	if (gimme == G_SCALAR)
736	{
737	if (sp == bot)
738	XPUSHs (&PL_sv_undef);
739
740	SP = bot + 1;
741	}
742
743	PUTBACK;
744	}	721	}
745		722
746	/ coroutine stack handling **********************************************/	723	/ coroutine stack handling **********************************************/
747		724
748	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);	725	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
…		…
834		811
835	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836	}	813	}
837		814
838	static void	815	static void
		816	prepare_nop (pTHX_ 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 (pTHX_ struct CoroSLF *frame)
		824	{
		825	return 0;
		826	}
		827
		828	static void
839	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
840	{	830	{
841	/*	831	/*
842	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
843	*/	833	*/
…		…
882	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883	SPAGAIN;	873	SPAGAIN;
884	}	874	}
885		875
886	/* 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
887	* likely was suspended in set_stacklevel, called from pp_set_stacklevel,	877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888	* so we have to emulate entering pp_set_stacklevel here.
889	*/	878	*/
890	SLF_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 */
891	}	881	}
892		882
893	static void	883	static void
894	coro_destruct (pTHX_ struct coro *coro)	884	coro_destruct (pTHX_ struct coro *coro)
895	{	885	{
…		…
1059	TAINT_NOT;	1049	TAINT_NOT;
1060	return 0;	1050	return 0;
1061	}	1051	}
1062		1052
1063	static void	1053	static void
1064	prepare_set_stacklevel (struct transfer_args ta, struct coro_cctx cctx)	1054	prepare_set_stacklevel (struct coro_transfer_args ta, struct coro_cctx cctx)
1065	{	1055	{
1066	ta->prev = (struct coro *)cctx;	1056	ta->prev = (struct coro *)cctx;
1067	ta->next = 0;	1057	ta->next = 0;
1068	}	1058	}
1069		1059
…		…
1129	# endif	1119	# endif
1130	#endif	1120	#endif
1131	{	1121	{
1132	dTHX;	1122	dTHX;
1133		1123
1134	/* we are the alternative tail to pp_set_stacklevel */	1124	/* normally we would need to skip the entersub here */
1135	/* so do the same things here */	1125	/* not doing so will re-execute it, which is exactly what we want */
1136	SLF_TAIL;
1137
1138	/* we now skip the op that did lead to transfer() */
1139	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
1140		1127
1141	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1142	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1143		1130
1144	/* 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 */
1145	transfer_tail (aTHX);	1133	transfer_tail (aTHX);
1146		1134
1147	/* 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 */
1148	PL_restartop = PL_op;	1136	PL_restartop = PL_op;
1149	perl_run (PL_curinterp);	1137	perl_run (PL_curinterp);
…		…
1308	transfer_check (pTHX_ struct coro prev, struct coro next)	1296	transfer_check (pTHX_ struct coro prev, struct coro next)
1309	{	1297	{
1310	if (expect_true (prev != next))	1298	if (expect_true (prev != next))
1311	{	1299	{
1312	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))	1300	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
1313	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,");
1314		1302
1315	if (expect_false (next->flags & CF_RUNNING))	1303	if (expect_false (next->flags & CF_RUNNING))
1316	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,");
1317		1305
1318	if (expect_false (next->flags & CF_DESTROYED))	1306	if (expect_false (next->flags & CF_DESTROYED))
1319	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,");
1320		1308
1321	#if !PERL_VERSION_ATLEAST (5,10,0)	1309	#if !PERL_VERSION_ATLEAST (5,10,0)
1322	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1310	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323	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,");
1324	#endif	1312	#endif
1325	}	1313	}
1326	}	1314	}
1327		1315
1328	/* always use the TRANSFER macro */	1316	/* always use the TRANSFER macro */
…		…
1332	dSTACKLEVEL;	1320	dSTACKLEVEL;
1333		1321
1334	/* sometimes transfer is only called to set idle_sp */	1322	/* sometimes transfer is only called to set idle_sp */
1335	if (expect_false (!next))	1323	if (expect_false (!next))
1336	{	1324	{
1337	((coro_cctx *)prev)->idle_sp = stacklevel;	1325	((coro_cctx )prev)->idle_sp = (void )stacklevel;
1338	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 */
1339	}	1327	}
1340	else if (expect_true (prev != next))	1328	else if (expect_true (prev != next))
1341	{	1329	{
1342	coro_cctx *prev__cctx;	1330	coro_cctx *prev__cctx;
…		…
1369		1357
1370	prev__cctx = prev->cctx;	1358	prev__cctx = prev->cctx;
1371		1359
1372	/* possibly untie and reuse the cctx */	1360	/* possibly untie and reuse the cctx */
1373	if (expect_true (	1361	if (expect_true (
1374	prev__cctx->idle_sp == stacklevel	1362	prev__cctx->idle_sp == (void *)stacklevel
1375	&& !(prev__cctx->flags & CC_TRACE)	1363	&& !(prev__cctx->flags & CC_TRACE)
1376	&& !force_cctx	1364	&& !force_cctx
1377	))	1365	))
1378	{	1366	{
1379	/* 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 */
…		…
1435		1423
1436	if (coro->mainstack && coro->mainstack != main_mainstack)	1424	if (coro->mainstack && coro->mainstack != main_mainstack)
1437	{	1425	{
1438	struct coro temp;	1426	struct coro temp;
1439		1427
1440	if (coro->flags & CF_RUNNING)	1428	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1441	croak ("FATAL: tried to destroy currently running coroutine");
1442		1429
1443	save_perl (aTHX_ &temp);	1430	save_perl (aTHX_ &temp);
1444	load_perl (aTHX_ coro);	1431	load_perl (aTHX_ coro);
1445		1432
1446	coro_destruct (aTHX_ coro);	1433	coro_destruct (aTHX_ coro);
…		…
1497	# define MGf_DUP 0	1484	# define MGf_DUP 0
1498	#endif	1485	#endif
1499	};	1486	};
1500		1487
1501	static void	1488	static void
1502	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)
1503	{	1490	{
1504	ta->prev = SvSTATE (prev_sv);	1491	ta->prev = SvSTATE (prev_sv);
1505	ta->next = SvSTATE (next_sv);	1492	ta->next = SvSTATE (next_sv);
1506	TRANSFER_CHECK (*ta);	1493	TRANSFER_CHECK (*ta);
1507	}	1494	}
1508		1495
1509	static void	1496	static void
1510	api_transfer (pTHX_ SV prev_sv, SV next_sv)	1497	api_transfer (pTHX_ SV prev_sv, SV next_sv)
1511	{	1498	{
1512	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1513		1500
1514	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1515	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1516	}	1503	}
1517		1504
…		…
1589	{	1576	{
1590	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1591	}	1578	}
1592		1579
1593	INLINE void	1580	INLINE void
1594	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1595	{	1582	{
1596	SV prev_sv, next_sv;	1583	SV prev_sv, next_sv;
1597		1584
1598	for (;;)	1585	for (;;)
1599	{	1586	{
…		…
1648	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1649	UNLOCK;	1636	UNLOCK;
1650	}	1637	}
1651		1638
1652	INLINE void	1639	INLINE void
1653	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1654	{	1641	{
1655	api_ready (aTHX_ coro_current);	1642	api_ready (aTHX_ coro_current);
1656	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1657	}	1644	}
1658		1645
1659	static void	1646	INLINE void
1660	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1647	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1661	{	1648	{
1662	SV *prev = SvRV (coro_current);	1649	SV *prev = SvRV (coro_current);
1663		1650
1664	if (coro_nready)	1651	if (coro_nready)
1665	{	1652	{
1666	prepare_schedule (aTHX_ ta);	1653	prepare_schedule (aTHX_ ta);
1667	api_ready (aTHX_ prev);	1654	api_ready (aTHX_ prev);
1668	}	1655	}
1669	else	1656	else
1670	ta->prev = ta->next = SvSTATE (prev);	1657	prepare_nop (aTHX_ ta);
1671	}	1658	}
1672		1659
1673	static void	1660	static void
1674	api_schedule (pTHX)	1661	api_schedule (pTHX)
1675	{	1662	{
1676	struct transfer_args ta;	1663	struct coro_transfer_args ta;
1677		1664
1678	prepare_schedule (aTHX_ &ta);	1665	prepare_schedule (aTHX_ &ta);
1679	TRANSFER (ta, 1);	1666	TRANSFER (ta, 1);
1680	}	1667	}
1681		1668
1682	static int	1669	static int
1683	api_cede (pTHX)	1670	api_cede (pTHX)
1684	{	1671	{
1685	struct transfer_args ta;	1672	struct coro_transfer_args ta;
1686		1673
1687	prepare_cede (aTHX_ &ta);	1674	prepare_cede (aTHX_ &ta);
1688		1675
1689	if (expect_true (ta.prev != ta.next))	1676	if (expect_true (ta.prev != ta.next))
1690	{	1677	{
…		…
1698	static int	1685	static int
1699	api_cede_notself (pTHX)	1686	api_cede_notself (pTHX)
1700	{	1687	{
1701	if (coro_nready)	1688	if (coro_nready)
1702	{	1689	{
1703	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1704		1691
1705	prepare_cede_notself (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1706	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1707	return 1;	1694	return 1;
1708	}	1695	}
…		…
1718	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1719	{	1706	{
1720	if (!coro->cctx)	1707	if (!coro->cctx)
1721	coro->cctx = cctx_new_run ();	1708	coro->cctx = cctx_new_run ();
1722	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1723	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1724		1711
1725	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));	1712	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
1726	}	1713	}
1727	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1728	{	1715	{
…		…
1833	static const CV slf_cv; / for quick consistency check */	1820	static const CV slf_cv; / for quick consistency check */
1834		1821
1835	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */	1822	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1836	static SV *slf_arg0;	1823	static SV *slf_arg0;
1837	static SV *slf_arg1;	1824	static SV *slf_arg1;
		1825	static SV *slf_arg2;
1838		1826
1839	/* this restores the stack in the case we patched the entersub, to */	1827	/* this restores the stack in the case we patched the entersub, to */
1840	/* recreate the stack frame as perl will on following calls */	1828	/* recreate the stack frame as perl will on following calls */
1841	/* since entersub cleared the stack */	1829	/* since entersub cleared the stack */
1842	static OP *	1830	static OP *
…		…
1847	PUSHMARK (SP);	1835	PUSHMARK (SP);
1848		1836
1849	EXTEND (SP, 3);	1837	EXTEND (SP, 3);
1850	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));	1838	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1851	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));	1839	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1840	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1852	PUSHs ((SV *)CvGV (slf_cv));	1841	PUSHs ((SV *)CvGV (slf_cv));
1853		1842
1854	RETURNOP (slf_restore.op_first);	1843	RETURNOP (slf_restore.op_first);
1855	}	1844	}
1856		1845
1857	#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */	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	}
1858		1851
1859	enum {	1852	static void
1860	CORO_SLF_CUSTOM = 0,	1853	slf_init_set_stacklevel (pTHX_ struct CoroSLF frame, SV *arg, int items)
1861	CORO_SLF_SET_STACKLEVEL = 1,	1854	{
1862	CORO_SLF_TRANSFER = 2	1855	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1863	};
1864		1856
1865	/* declare prototype */	1857	frame->prepare = slf_prepare_set_stacklevel;
1866	XS(XS_Coro__State__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 (aTHX_ 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
1867		1904
1868	/*	1905	/*
1869	* these not obviously related functions are all rolled into one	1906	* these not obviously related functions are all rolled into one
1870	* function to increase chances that they all will call transfer with the same	1907	* function to increase chances that they all will call transfer with the same
1871	* stack offset	1908	* stack offset
1872	* SLF stands for "schedule-like-function".	1909	* SLF stands for "schedule-like-function".
1873	*/	1910	*/
1874	static OP *	1911	static OP *
1875	pp_slf (pTHX)	1912	pp_slf (pTHX)
1876	{	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 */
1877	dSP;	1922	dSP;
1878	struct transfer_args ta;
1879	SV **arg = PL_stack_base + TOPMARK + 1;	1923	SV **arg = PL_stack_base + TOPMARK + 1;
1880	int items = SP - arg; /* args without function object */	1924	int items = SP - arg; /* args without function object */
1881	int ix = PL_op->op_private & OPpENTERSUB_SLF;
1882	struct CoroSLF *slf = 0;
1883	SV gv = sp;	1925	SV gv = sp;
1884		1926
1885	/* do a quick consistency check on the "function" object, and if it isn't */	1927	/* do a quick consistency check on the "function" object, and if it isn't */
1886	/* for us, divert to the real entersub */	1928	/* for us, divert to the real entersub */
1887	if (SvTYPE (gv) != SVt_PVGV \|\| CvXSUB (GvCV (gv)) != XS_Coro__State__set_stacklevel)	1929	if (SvTYPE (gv) != SVt_PVGV \|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1888	return PL_ppaddr[OP_ENTERSUB](aTHX);	1930	return PL_ppaddr[OP_ENTERSUB](aTHX);
1889		1931
1890	/* pop args */	1932	/* pop args */
1891	SP = PL_stack_base + POPMARK;	1933	SP = PL_stack_base + POPMARK;
1892		1934
1893	if (!(PL_op->op_flags & OPf_STACKED))	1935	if (!(PL_op->op_flags & OPf_STACKED))
1894	{	1936	{
1895	/* ampersand-form of call, use @_ instead of stack */	1937	/* ampersand-form of call, use @_ instead of stack */
1896	AV *av = GvAV (PL_defgv);	1938	AV *av = GvAV (PL_defgv);
1897	arg = AvARRAY (av);	1939	arg = AvARRAY (av);
1898	items = AvFILLp (av) + 1;	1940	items = AvFILLp (av) + 1;
1899	}	1941	}
1900		1942
1901	PUTBACK;	1943	PUTBACK;
1902		1944
1903	if (!ix)	1945	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1904	{	1946	}
1905	slf = (struct CoroSLF *)CvXSUBANY (GvCV (gv)).any_ptr;
1906	ix = slf->prepare (aTHX_ arg, items);
1907	}
1908		1947
1909	switch (ix)	1948	/* now interpret the slf_frame */
1910	{	1949	/* we use a callback system not to make the code needlessly */
1911	case CORO_SLF_SET_STACKLEVEL:	1950	/* complicated, but so we can run multiple perl coros from one cctx */
1912	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1913	break;
1914
1915	case CORO_SLF_TRANSFER:
1916	if (items != 2)
1917	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1918
1919	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1920	break;
1921
1922	case CORO_SLF_SCHEDULE:
1923	prepare_schedule (aTHX_ &ta);
1924	break;
1925
1926	case CORO_SLF_CEDE:
1927	prepare_cede (aTHX_ &ta);
1928	break;
1929
1930	case CORO_SLF_CEDE_NOTSELF:
1931	prepare_cede_notself (aTHX_ &ta);
1932	break;
1933
1934	default:
1935	abort ();
1936	}
1937		1951
1938	do	1952	do
		1953	{
		1954	struct coro_transfer_args ta;
		1955
		1956	slf_frame.prepare (aTHX_ &ta);
1939	TRANSFER (ta, 0);	1957	TRANSFER (ta, 0);
1940	while (slf && slf->check (aTHX));
1941		1958
1942	SPAGAIN;	1959	checkmark = PL_stack_sp - PL_stack_base;
		1960	}
		1961	while (slf_frame.check (aTHX_ &slf_frame));
1943		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
1944	PUTBACK;	1979	PUTBACK;
1945	SLF_TAIL;	1980	}
1946	SPAGAIN;
1947	RETURN;
1948	}
1949		1981
1950	static void	1982	return NORMAL;
1951	coro_slf_patch (pTHX_ CV cv, int ix, SV *args, int items)	1983	}
1952	{
1953	assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
1954		1984
		1985	static void
		1986	api_execute_slf (pTHX_ CV cv, coro_slf_cb init_cb, SV *arg, int items)
		1987	{
1955	assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));	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;
1956	slf_cv = cv;	1999	slf_cv = cv;
1957		2000
1958	/* we patch the op, and then re-run the whole call */	2001	/* we patch the op, and then re-run the whole call */
1959	/* we have to put the same argument on the stack for this to work */	2002	/* we have to put the same argument on the stack for this to work */
1960	/* and this will be done by pp_restore */	2003	/* and this will be done by pp_restore */
1961	slf_restore.op_next = (OP *)&slf_restore;	2004	slf_restore.op_next = (OP *)&slf_restore;
1962	slf_restore.op_type = OP_NULL;	2005	slf_restore.op_type = OP_NULL;
1963	slf_restore.op_ppaddr = pp_restore;	2006	slf_restore.op_ppaddr = pp_restore;
1964	slf_restore.op_first = PL_op;	2007	slf_restore.op_first = PL_op;
1965		2008
1966	slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;	2009	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1967	slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;	2010	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		2011	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1968		2012
1969	PL_op->op_ppaddr = pp_slf;	2013	PL_op->op_ppaddr = pp_slf;
1970	PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF \| ix; /* we potentially share our private flags with entersub */
1971		2014
1972	PL_op = (OP *)&slf_restore;	2015	PL_op = (OP *)&slf_restore;
1973	}	2016	}
1974		2017
		2018	/*****************************************************************************/
		2019
1975	static void	2020	static int
1976	api_execute_slf (pTHX_ CV cv, const struct CoroSLF slf, SV **arg, int items)	2021	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
1977	{	2022	{
1978	CvXSUBANY (cv).any_ptr = (void *)slf;	2023	AV av = (AV )frame->data;
1979	coro_slf_patch (aTHX_ cv, CORO_SLF_CUSTOM, arg, items);	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
1980	}	2067	}
1981		2068
1982	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2069	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1983		2070
1984	PROTOTYPES: DISABLE	2071	PROTOTYPES: DISABLE
…		…
2017	while (main_top_env->je_prev)	2104	while (main_top_env->je_prev)
2018	main_top_env = main_top_env->je_prev;	2105	main_top_env = main_top_env->je_prev;
2019		2106
2020	coroapi.ver = CORO_API_VERSION;	2107	coroapi.ver = CORO_API_VERSION;
2021	coroapi.rev = CORO_API_REVISION;	2108	coroapi.rev = CORO_API_REVISION;
		2109
2022	coroapi.transfer = api_transfer;	2110	coroapi.transfer = api_transfer;
		2111
		2112	coroapi.sv_state = SvSTATE_;
2023	coroapi.execute_slf = api_execute_slf;	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;
2024		2118
2025	{	2119	{
2026	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2120	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2027		2121
2028	if (!svp) croak ("Time::HiRes is required");	2122	if (!svp) croak ("Time::HiRes is required");
…		…
2063	OUTPUT:	2157	OUTPUT:
2064	RETVAL	2158	RETVAL
2065		2159
2066	void	2160	void
2067	_set_stacklevel (...)	2161	_set_stacklevel (...)
2068	ALIAS:	2162	CODE:
2069	_set_stacklevel = CORO_SLF_SET_STACKLEVEL	2163	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2070	Coro::State::transfer = CORO_SLF_TRANSFER	2164
2071	Coro::schedule = CORO_SLF_SCHEDULE	2165	void
2072	Coro::cede = CORO_SLF_CEDE	2166	transfer (...)
2073	Coro::cede_notself = CORO_SLF_CEDE_NOTSELF	2167	PROTOTYPE: $$
2074	CODE:	2168	CODE:
2075	coro_slf_patch (aTHX_ cv, ix, &ST (0), items);	2169	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
2076		2170
2077	bool	2171	bool
2078	_destroy (SV *coro_sv)	2172	_destroy (SV *coro_sv)
2079	CODE:	2173	CODE:
2080	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2174	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2087	CODE:	2181	CODE:
2088	_exit (code);	2182	_exit (code);
2089		2183
2090	int	2184	int
2091	cctx_stacksize (int new_stacksize = 0)	2185	cctx_stacksize (int new_stacksize = 0)
		2186	PROTOTYPE: ;$
2092	CODE:	2187	CODE:
2093	RETVAL = cctx_stacksize;	2188	RETVAL = cctx_stacksize;
2094	if (new_stacksize)	2189	if (new_stacksize)
2095	{	2190	{
2096	cctx_stacksize = new_stacksize;	2191	cctx_stacksize = new_stacksize;
…		…
2099	OUTPUT:	2194	OUTPUT:
2100	RETVAL	2195	RETVAL
2101		2196
2102	int	2197	int
2103	cctx_max_idle (int max_idle = 0)	2198	cctx_max_idle (int max_idle = 0)
		2199	PROTOTYPE: ;$
2104	CODE:	2200	CODE:
2105	RETVAL = cctx_max_idle;	2201	RETVAL = cctx_max_idle;
2106	if (max_idle > 1)	2202	if (max_idle > 1)
2107	cctx_max_idle = max_idle;	2203	cctx_max_idle = max_idle;
2108	OUTPUT:	2204	OUTPUT:
2109	RETVAL	2205	RETVAL
2110		2206
2111	int	2207	int
2112	cctx_count ()	2208	cctx_count ()
		2209	PROTOTYPE:
2113	CODE:	2210	CODE:
2114	RETVAL = cctx_count;	2211	RETVAL = cctx_count;
2115	OUTPUT:	2212	OUTPUT:
2116	RETVAL	2213	RETVAL
2117		2214
2118	int	2215	int
2119	cctx_idle ()	2216	cctx_idle ()
		2217	PROTOTYPE:
2120	CODE:	2218	CODE:
2121	RETVAL = cctx_idle;	2219	RETVAL = cctx_idle;
2122	OUTPUT:	2220	OUTPUT:
2123	RETVAL	2221	RETVAL
2124		2222
2125	void	2223	void
2126	list ()	2224	list ()
		2225	PROTOTYPE:
2127	PPCODE:	2226	PPCODE:
2128	{	2227	{
2129	struct coro *coro;	2228	struct coro *coro;
2130	for (coro = coro_first; coro; coro = coro->next)	2229	for (coro = coro_first; coro; coro = coro->next)
2131	if (coro->hv)	2230	if (coro->hv)
…		…
2198	SvREFCNT_dec (self->throw);	2297	SvREFCNT_dec (self->throw);
2199	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2298	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2200		2299
2201	void	2300	void
2202	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: $;$
2203	C_ARGS: aTHX_ coro, flags	2303	C_ARGS: aTHX_ coro, flags
2204		2304
2205	SV *	2305	SV *
2206	has_cctx (Coro::State coro)	2306	has_cctx (Coro::State coro)
2207	PROTOTYPE: $	2307	PROTOTYPE: $
…		…
2232	OUTPUT:	2332	OUTPUT:
2233	RETVAL	2333	RETVAL
2234		2334
2235	void	2335	void
2236	force_cctx ()	2336	force_cctx ()
		2337	PROTOTYPE:
2237	CODE:	2338	CODE:
2238	struct coro *coro = SvSTATE (coro_current);	2339	struct coro *coro = SvSTATE (coro_current);
2239	coro->cctx->idle_sp = 0;	2340	coro->cctx->idle_sp = 0;
2240		2341
2241	void	2342	void
…		…
2243	PROTOTYPE: $	2344	PROTOTYPE: $
2244	ALIAS:	2345	ALIAS:
2245	swap_defav = 1	2346	swap_defav = 1
2246	CODE:	2347	CODE:
2247	if (!self->slot)	2348	if (!self->slot)
2248	croak ("cannot swap state with coroutine that has no saved state");	2349	croak ("cannot swap state with coroutine that has no saved state,");
2249	else	2350	else
2250	{	2351	{
2251	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);	2352	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
2252	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;	2353	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
2253		2354
…		…
2293	GCoroAPI = &coroapi;	2394	GCoroAPI = &coroapi;
2294	sv_setiv (sv, (IV)&coroapi);	2395	sv_setiv (sv, (IV)&coroapi);
2295	SvREADONLY_on (sv);	2396	SvREADONLY_on (sv);
2296	}	2397	}
2297	}	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);
2298		2414
2299	void	2415	void
2300	_set_current (SV *current)	2416	_set_current (SV *current)
2301	PROTOTYPE: $	2417	PROTOTYPE: $
2302	CODE:	2418	CODE:
…		…
2312	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2428	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2313	UNLOCK;	2429	UNLOCK;
2314		2430
2315	int	2431	int
2316	prio (Coro::State coro, int newprio = 0)	2432	prio (Coro::State coro, int newprio = 0)
		2433	PROTOTYPE: $;$
2317	ALIAS:	2434	ALIAS:
2318	nice = 1	2435	nice = 1
2319	CODE:	2436	CODE:
2320	{	2437	{
2321	RETVAL = coro->prio;	2438	RETVAL = coro->prio;
…		…
2385	{	2502	{
2386	av_fill (defav, len - 1);	2503	av_fill (defav, len - 1);
2387	for (i = 0; i < len; ++i)	2504	for (i = 0; i < len; ++i)
2388	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]));
2389	}	2506	}
2390
2391	SvREFCNT_dec (invoke);
2392	}	2507	}
2393		2508
2394	void	2509	void
2395	_pool_2 (SV *cb)	2510	_pool_2 (SV *cb)
2396	CODE:	2511	CODE:
…		…
2474		2589
2475	MODULE = Coro::State PACKAGE = Coro::AIO	2590	MODULE = Coro::State PACKAGE = Coro::AIO
2476		2591
2477	void	2592	void
2478	_get_state (SV *self)	2593	_get_state (SV *self)
		2594	PROTOTYPE: $
2479	PPCODE:	2595	PPCODE:
2480	{	2596	{
2481	AV *defav = GvAV (PL_defgv);	2597	AV *defav = GvAV (PL_defgv);
2482	AV *av = newAV ();	2598	AV *av = newAV ();
2483	int i;	2599	int i;
…		…
2526	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2642	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2527		2643
2528	BOOT:	2644	BOOT:
2529	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2645	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2530		2646
2531	SV *	2647	void
2532	_schedule (...)	2648	_schedule (...)
2533	PROTOTYPE: @
2534	CODE:	2649	CODE:
2535	{	2650	{
2536	static int incede;	2651	static int incede;
2537		2652
2538	api_cede_notself (aTHX);	2653	api_cede_notself (aTHX);
…		…
2557	MODULE = Coro::State PACKAGE = PerlIO::cede	2672	MODULE = Coro::State PACKAGE = PerlIO::cede
2558		2673
2559	BOOT:	2674	BOOT:
2560	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2675	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2561		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 (aTHX_ 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 1.271 by root, Fri Nov 14 07:35:32 2008 UTC vs. Revision 1.277 by root, Sat Nov 15 18:40:55 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.271 by root, Fri Nov 14 07:35:32 2008 UTC vs.
Revision 1.277 by root, Sat Nov 15 18:40:55 2008 UTC