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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.268 by root, Fri Nov 14 06:41:41 2008 UTC vs.
Revision 1.273 by root, Fri Nov 14 23:48:10 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
…		…
299		299
300	/* for Coro.pm */	300	/* for Coro.pm */
301	static SV *coro_current;	301	static SV *coro_current;
302	static SV *coro_readyhook;	302	static SV *coro_readyhook;
303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304	static int coro_nready;
305	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
306		306
307	/ lowlevel stuff ********************************************************/	307	/ lowlevel stuff ********************************************************/
308		308
309	static SV *	309	static SV *
310	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
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_set_stacklevel calling us */
722	#define SSL_HEAD (void)0
723	/* we sometimes need to create the effect of leaving via pp_set_stacklevel */
724	#define SSL_TAIL set_stacklevel_tail (aTHX)
725
726	INLINE void
727	set_stacklevel_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 (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
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	SSL_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	SSL_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 */
…		…
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 (SV prev_sv, SV next_sv)	1497	api_transfer (pTHX_ SV prev_sv, SV next_sv)
1511	{	1498	{
1512	dTHX;
1513	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1514		1500
1515	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1516	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1517	}	1503	}
1518		1504
…		…
1535		1521
1536	return 0;	1522	return 0;
1537	}	1523	}
1538		1524
1539	static int	1525	static int
1540	api_ready (SV *coro_sv)	1526	api_ready (pTHX_ SV *coro_sv)
1541	{	1527	{
1542	dTHX;
1543	struct coro *coro;	1528	struct coro *coro;
1544	SV *sv_hook;	1529	SV *sv_hook;
1545	void (*xs_hook)(void);	1530	void (*xs_hook)(void);
1546		1531
1547	if (SvROK (coro_sv))	1532	if (SvROK (coro_sv))
…		…
1585		1570
1586	return 1;	1571	return 1;
1587	}	1572	}
1588		1573
1589	static int	1574	static int
1590	api_is_ready (SV *coro_sv)	1575	api_is_ready (pTHX_ SV *coro_sv)
1591	{	1576	{
1592	dTHX;
1593
1594	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595	}	1578	}
1596		1579
1597	INLINE void	1580	INLINE void
1598	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1599	{	1582	{
1600	SV prev_sv, next_sv;	1583	SV prev_sv, next_sv;
1601		1584
1602	for (;;)	1585	for (;;)
1603	{	1586	{
…		…
1652	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1653	UNLOCK;	1636	UNLOCK;
1654	}	1637	}
1655		1638
1656	INLINE void	1639	INLINE void
1657	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1658	{	1641	{
1659	api_ready (coro_current);	1642	api_ready (aTHX_ coro_current);
1660	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1661	}	1644	}
1662		1645
1663	static void	1646	INLINE void
1664	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1647	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1665	{	1648	{
1666	SV *prev = SvRV (coro_current);	1649	SV *prev = SvRV (coro_current);
1667		1650
1668	if (coro_nready)	1651	if (coro_nready)
1669	{	1652	{
1670	prepare_schedule (aTHX_ ta);	1653	prepare_schedule (aTHX_ ta);
1671	api_ready (prev);	1654	api_ready (aTHX_ prev);
1672	}	1655	}
1673	else	1656	else
1674	ta->prev = ta->next = SvSTATE (prev);	1657	prepare_nop (aTHX_ ta);
1675	}	1658	}
1676		1659
1677	static void	1660	static void
1678	api_schedule (void)	1661	api_schedule (pTHX)
1679	{	1662	{
1680	dTHX;
1681	struct transfer_args ta;	1663	struct coro_transfer_args ta;
1682		1664
1683	prepare_schedule (aTHX_ &ta);	1665	prepare_schedule (aTHX_ &ta);
1684	TRANSFER (ta, 1);	1666	TRANSFER (ta, 1);
1685	}	1667	}
1686		1668
1687	static int	1669	static int
1688	api_cede (void)	1670	api_cede (pTHX)
1689	{	1671	{
1690	dTHX;
1691	struct transfer_args ta;	1672	struct coro_transfer_args ta;
1692		1673
1693	prepare_cede (aTHX_ &ta);	1674	prepare_cede (aTHX_ &ta);
1694		1675
1695	if (expect_true (ta.prev != ta.next))	1676	if (expect_true (ta.prev != ta.next))
1696	{	1677	{
…		…
1700	else	1681	else
1701	return 0;	1682	return 0;
1702	}	1683	}
1703		1684
1704	static int	1685	static int
1705	api_cede_notself (void)	1686	api_cede_notself (pTHX)
1706	{	1687	{
1707	if (coro_nready)	1688	if (coro_nready)
1708	{	1689	{
1709	dTHX;
1710	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1711		1691
1712	prepare_cede_notself (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1713	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1714	return 1;	1694	return 1;
1715	}	1695	}
1716	else	1696	else
1717	return 0;	1697	return 0;
1718	}	1698	}
1719		1699
1720	static void	1700	static void
1721	api_trace (SV *coro_sv, int flags)	1701	api_trace (pTHX_ SV *coro_sv, int flags)
1722	{	1702	{
1723	dTHX;
1724	struct coro *coro = SvSTATE (coro_sv);	1703	struct coro *coro = SvSTATE (coro_sv);
1725		1704
1726	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1727	{	1706	{
1728	if (!coro->cctx)	1707	if (!coro->cctx)
1729	coro->cctx = cctx_new_run ();	1708	coro->cctx = cctx_new_run ();
1730	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1731	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1732		1711
1733	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));	1712	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
1734	}	1713	}
1735	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1736	{	1715	{
…		…
1795	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1774	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1796	double now = nvtime ();	1775	double now = nvtime ();
1797		1776
1798	if (now >= self->next)	1777	if (now >= self->next)
1799	{	1778	{
1800	api_cede ();	1779	api_cede (aTHX);
1801	self->next = now + self->every;	1780	self->next = now + self->every;
1802	}	1781	}
1803		1782
1804	return PerlIOBuf_flush (aTHX_ f);	1783	return PerlIOBuf_flush (aTHX_ f);
1805	}	1784	}
…		…
1836	PerlIOBuf_set_ptrcnt,	1815	PerlIOBuf_set_ptrcnt,
1837	};	1816	};
1838		1817
1839	/*****************************************************************************/	1818	/*****************************************************************************/
1840		1819
1841	static const CV ssl_cv; / for quick consistency check */	1820	static const CV slf_cv; / for quick consistency check */
1842		1821
1843	static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */	1822	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1844	static SV *ssl_arg0;	1823	static SV *slf_arg0;
1845	static SV *ssl_arg1;	1824	static SV *slf_arg1;
		1825	static SV *slf_arg2;
1846		1826
1847	/* 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 */
1848	/* recreate the stack frame as perl will on following calls */	1828	/* recreate the stack frame as perl will on following calls */
1849	/* since entersub cleared the stack */	1829	/* since entersub cleared the stack */
1850	static OP *	1830	static OP *
…		…
1853	dSP;	1833	dSP;
1854		1834
1855	PUSHMARK (SP);	1835	PUSHMARK (SP);
1856		1836
1857	EXTEND (SP, 3);	1837	EXTEND (SP, 3);
1858	if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;	1838	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1859	if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;	1839	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1840	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1860	PUSHs ((SV *)CvGV (ssl_cv));	1841	PUSHs ((SV *)CvGV (slf_cv));
1861		1842
1862	RETURNOP (ssl_restore.op_first);	1843	RETURNOP (slf_restore.op_first);
1863	}	1844	}
1864		1845
1865	#define OPpENTERSUB_SSL 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	}
1866		1851
1867	/* declare prototype */	1852	static void
1868	XS(XS_Coro__State__set_stacklevel);	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
1869		1904
1870	/*	1905	/*
1871	* these not obviously related functions are all rolled into one	1906	* these not obviously related functions are all rolled into one
1872	* 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
1873	* stack offset	1908	* stack offset
		1909	* SLF stands for "schedule-like-function".
1874	*/	1910	*/
1875	static OP *	1911	static OP *
1876	pp_set_stacklevel (pTHX)	1912	pp_slf (pTHX)
1877	{	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 */
1878	dSP;	1922	dSP;
1879	struct transfer_args ta;
1880	SV **arg = PL_stack_base + TOPMARK + 1;	1923	SV **arg = PL_stack_base + TOPMARK + 1;
1881	int items = SP - arg; /* args without function object */	1924	int items = SP - arg; /* args without function object */
		1925	SV gv = sp;
1882		1926
1883	/* 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 */
1884	/* for us, divert to the real entersub */	1928	/* for us, divert to the real entersub */
1885	if (SvTYPE (sp) != SVt_PVGV \|\| CvXSUB (GvCV (sp)) != XS_Coro__State__set_stacklevel)	1929	if (SvTYPE (gv) != SVt_PVGV \|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1886	return PL_ppaddr[OP_ENTERSUB](aTHX);	1930	return PL_ppaddr[OP_ENTERSUB](aTHX);
1887		1931
1888	/* pop args */	1932	/* pop args */
1889	SP = PL_stack_base + POPMARK;	1933	SP = PL_stack_base + POPMARK;
1890		1934
1891	if (!(PL_op->op_flags & OPf_STACKED))	1935	if (!(PL_op->op_flags & OPf_STACKED))
1892	{	1936	{
1893	/* ampersand-form of call, use @_ instead of stack */	1937	/* ampersand-form of call, use @_ instead of stack */
1894	AV *av = GvAV (PL_defgv);	1938	AV *av = GvAV (PL_defgv);
1895	arg = AvARRAY (av);	1939	arg = AvARRAY (av);
1896	items = AvFILLp (av) + 1;	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;
1897	}	1977	}
1898		1978
1899	PUTBACK;	1979	PUTBACK;
1900	switch (PL_op->op_private & OPpENTERSUB_SSL)
1901	{
1902	case 0:
1903	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1904	break;
1905
1906	case 1:
1907	if (items != 2)
1908	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1909
1910	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1911	break;
1912
1913	case 2:
1914	prepare_schedule (aTHX_ &ta);
1915	break;
1916
1917	case 3:
1918	prepare_cede (aTHX_ &ta);
1919	break;
1920
1921	case 4:
1922	prepare_cede_notself (aTHX_ &ta);
1923	break;
1924	}	1980	}
1925		1981
1926	TRANSFER (ta, 0);	1982	return NORMAL;
1927	SPAGAIN;
1928
1929	skip:
1930	PUTBACK;
1931	SSL_TAIL;
1932	SPAGAIN;
1933	RETURN;
1934	}	1983	}
1935		1984
1936	static void	1985	static void
1937	coro_ssl_patch (pTHX_ CV cv, int ix, SV *args, int items)	1986	api_execute_slf (pTHX_ CV cv, coro_slf_cb init_cb, SV *arg, int items)
1938	{	1987	{
1939	assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1940
1941	assert (("FATAL: ssl 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 other means, caught");
		1993
		1994	if (items > 3)
		1995	croak ("Coro only supports up to three arguments to SLF functions currently, caught");
		1996
		1997	CvFLAGS (cv) \|= CVf_SLF;
		1998	CvXSUBANY (cv).any_ptr = (void *)init_cb;
1942	ssl_cv = cv;	1999	slf_cv = cv;
1943		2000
1944	/* we patch the op, and then re-run the whole call */	2001	/* we patch the op, and then re-run the whole call */
1945	/* we have to put some dummy argument on the stack for this to work */	2002	/* we have to put the same argument on the stack for this to work */
		2003	/* and this will be done by pp_restore */
1946	ssl_restore.op_next = (OP *)&ssl_restore;	2004	slf_restore.op_next = (OP *)&slf_restore;
1947	ssl_restore.op_type = OP_NULL;	2005	slf_restore.op_type = OP_NULL;
1948	ssl_restore.op_ppaddr = pp_restore;	2006	slf_restore.op_ppaddr = pp_restore;
1949	ssl_restore.op_first = PL_op;	2007	slf_restore.op_first = PL_op;
1950		2008
1951	ssl_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;	2009	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1952	ssl_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;
1953		2012
1954	PL_op->op_ppaddr = pp_set_stacklevel;	2013	PL_op->op_ppaddr = pp_slf;
1955	PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL \| ix; /* we potentially share our private flags with entersub */
1956		2014
1957	PL_op = (OP *)&ssl_restore;	2015	PL_op = (OP *)&slf_restore;
1958	}	2016	}
1959		2017
1960	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2018	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1961		2019
1962	PROTOTYPES: DISABLE	2020	PROTOTYPES: DISABLE
…		…
1993	main_top_env = PL_top_env;	2051	main_top_env = PL_top_env;
1994		2052
1995	while (main_top_env->je_prev)	2053	while (main_top_env->je_prev)
1996	main_top_env = main_top_env->je_prev;	2054	main_top_env = main_top_env->je_prev;
1997		2055
1998	coroapi.ver = CORO_API_VERSION;	2056	coroapi.ver = CORO_API_VERSION;
1999	coroapi.rev = CORO_API_REVISION;	2057	coroapi.rev = CORO_API_REVISION;
		2058
2000	coroapi.transfer = api_transfer;	2059	coroapi.transfer = api_transfer;
		2060
		2061	coroapi.sv_state = SvSTATE_;
		2062	coroapi.execute_slf = api_execute_slf;
		2063	coroapi.prepare_nop = prepare_nop;
		2064	coroapi.prepare_schedule = prepare_schedule;
		2065	coroapi.prepare_cede = prepare_cede;
		2066	coroapi.prepare_cede_notself = prepare_cede_notself;
2001		2067
2002	{	2068	{
2003	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2069	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2004		2070
2005	if (!svp) croak ("Time::HiRes is required");	2071	if (!svp) croak ("Time::HiRes is required");
…		…
2040	OUTPUT:	2106	OUTPUT:
2041	RETVAL	2107	RETVAL
2042		2108
2043	void	2109	void
2044	_set_stacklevel (...)	2110	_set_stacklevel (...)
2045	ALIAS:	2111	CODE:
2046	Coro::State::transfer = 1	2112	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2047	Coro::schedule = 2	2113
2048	Coro::cede = 3	2114	void
2049	Coro::cede_notself = 4	2115	transfer (...)
2050	CODE:	2116	CODE:
2051	coro_ssl_patch (aTHX_ cv, ix, &ST (0), items);	2117	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
2052		2118
2053	bool	2119	bool
2054	_destroy (SV *coro_sv)	2120	_destroy (SV *coro_sv)
2055	CODE:	2121	CODE:
2056	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2122	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2174	SvREFCNT_dec (self->throw);	2240	SvREFCNT_dec (self->throw);
2175	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2241	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2176		2242
2177	void	2243	void
2178	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2244	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		2245	C_ARGS: aTHX_ coro, flags
2179		2246
2180	SV *	2247	SV *
2181	has_cctx (Coro::State coro)	2248	has_cctx (Coro::State coro)
2182	PROTOTYPE: $	2249	PROTOTYPE: $
2183	CODE:	2250	CODE:
…		…
2218	PROTOTYPE: $	2285	PROTOTYPE: $
2219	ALIAS:	2286	ALIAS:
2220	swap_defav = 1	2287	swap_defav = 1
2221	CODE:	2288	CODE:
2222	if (!self->slot)	2289	if (!self->slot)
2223	croak ("cannot swap state with coroutine that has no saved state");	2290	croak ("cannot swap state with coroutine that has no saved state,");
2224	else	2291	else
2225	{	2292	{
2226	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);	2293	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
2227	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;	2294	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
2228		2295
…		…
2260	coroapi.schedule = api_schedule;	2327	coroapi.schedule = api_schedule;
2261	coroapi.cede = api_cede;	2328	coroapi.cede = api_cede;
2262	coroapi.cede_notself = api_cede_notself;	2329	coroapi.cede_notself = api_cede_notself;
2263	coroapi.ready = api_ready;	2330	coroapi.ready = api_ready;
2264	coroapi.is_ready = api_is_ready;	2331	coroapi.is_ready = api_is_ready;
2265	coroapi.nready = &coro_nready;	2332	coroapi.nready = coro_nready;
2266	coroapi.current = coro_current;	2333	coroapi.current = coro_current;
2267		2334
2268	GCoroAPI = &coroapi;	2335	GCoroAPI = &coroapi;
2269	sv_setiv (sv, (IV)&coroapi);	2336	sv_setiv (sv, (IV)&coroapi);
2270	SvREADONLY_on (sv);	2337	SvREADONLY_on (sv);
2271	}	2338	}
2272	}	2339	}
		2340
		2341	void
		2342	schedule (...)
		2343	CODE:
		2344	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), items);
		2345
		2346	void
		2347	cede (...)
		2348	CODE:
		2349	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), items);
		2350
		2351	void
		2352	cede_notself (...)
		2353	CODE:
		2354	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), items);
2273		2355
2274	void	2356	void
2275	_set_current (SV *current)	2357	_set_current (SV *current)
2276	PROTOTYPE: $	2358	PROTOTYPE: $
2277	CODE:	2359	CODE:
…		…
2311		2393
2312	SV *	2394	SV *
2313	ready (SV *self)	2395	ready (SV *self)
2314	PROTOTYPE: $	2396	PROTOTYPE: $
2315	CODE:	2397	CODE:
2316	RETVAL = boolSV (api_ready (self));	2398	RETVAL = boolSV (api_ready (aTHX_ self));
2317	OUTPUT:	2399	OUTPUT:
2318	RETVAL	2400	RETVAL
2319		2401
2320	int	2402	int
2321	nready (...)	2403	nready (...)
…		…
2391	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2473	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2392		2474
2393	coro->prio = 0;	2475	coro->prio = 0;
2394		2476
2395	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2477	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2396	api_trace (coro_current, 0);	2478	api_trace (aTHX_ coro_current, 0);
2397		2479
2398	av_push (av_async_pool, newSVsv (coro_current));	2480	av_push (av_async_pool, newSVsv (coro_current));
2399	}	2481	}
2400		2482
2401	#if 0	2483	#if 0
…		…
2473		2555
2474	av_push (av, data_sv);	2556	av_push (av, data_sv);
2475		2557
2476	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2558	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2477		2559
2478	api_ready (self);	2560	api_ready (aTHX_ self);
2479	}	2561	}
2480		2562
2481	void	2563	void
2482	_set_state (SV *state)	2564	_set_state (SV *state)
2483	PROTOTYPE: $	2565	PROTOTYPE: $
…		…
2508	PROTOTYPE: @	2590	PROTOTYPE: @
2509	CODE:	2591	CODE:
2510	{	2592	{
2511	static int incede;	2593	static int incede;
2512		2594
2513	api_cede_notself ();	2595	api_cede_notself (aTHX);
2514		2596
2515	++incede;	2597	++incede;
2516	while (coro_nready >= incede && api_cede ())	2598	while (coro_nready >= incede && api_cede (aTHX))
2517	;	2599	;
2518		2600
2519	sv_setsv (sv_activity, &PL_sv_undef);	2601	sv_setsv (sv_activity, &PL_sv_undef);
2520	if (coro_nready >= incede)	2602	if (coro_nready >= incede)
2521	{	2603	{

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing Coro/Coro/State.xs (file contents): Revision 1.268 by root, Fri Nov 14 06:41:41 2008 UTC vs. Revision 1.273 by root, Fri Nov 14 23:48:10 2008 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.268 by root, Fri Nov 14 06:41:41 2008 UTC vs.
Revision 1.273 by root, Fri Nov 14 23:48:10 2008 UTC