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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.284 by root, Mon Nov 17 01:05:47 2008 UTC vs.
Revision 1.287 by root, Mon Nov 17 07:03:12 2008 UTC

…		…
147	# if CORO_PTHREAD	147	# if CORO_PTHREAD
148	static void *coro_thx;	148	static void *coro_thx;
149	# endif	149	# endif
150	#endif	150	#endif
151		151
152	/* helper storage struct for Coro::AIO */
153	struct io_state
154	{
155	AV *res;
156	int errorno;
157	I32 laststype; /* U16 in 5.10.0 */
158	int laststatval;
159	Stat_t statcache;
160	};
161
162	static double (nvtime)(); / so why doesn't it take void? */	152	static double (nvtime)(); / so why doesn't it take void? */
163		153
164	static U32 cctx_gen;	154	static U32 cctx_gen;
165	static size_t cctx_stacksize = CORO_STACKSIZE;	155	static size_t cctx_stacksize = CORO_STACKSIZE;
166	static struct CoroAPI coroapi;	156	static struct CoroAPI coroapi;
…		…
241	/* this is a structure representing a perl-level coroutine */	231	/* this is a structure representing a perl-level coroutine */
242	struct coro {	232	struct coro {
243	/* the C coroutine allocated to this perl coroutine, if any */	233	/* the C coroutine allocated to this perl coroutine, if any */
244	coro_cctx *cctx;	234	coro_cctx *cctx;
245		235
246	/* process data */	236	/* state data */
247	struct CoroSLF slf_frame; /* saved slf frame */	237	struct CoroSLF slf_frame; /* saved slf frame */
248	AV *mainstack;	238	AV *mainstack;
249	perl_slots slot; / basically the saved sp */	239	perl_slots slot; / basically the saved sp */
250		240
251	AV args; / data associated with this coroutine (initial args) */	241	AV args; / data associated with this coroutine (initial args) */
…		…
269	};	259	};
270		260
271	typedef struct coro *Coro__State;	261	typedef struct coro *Coro__State;
272	typedef struct coro *Coro__State_or_hashref;	262	typedef struct coro *Coro__State_or_hashref;
273		263
		264	/* the following variables are effectively part of the perl context */
		265	/* and get copied between struct coro and these variables */
		266	/* the mainr easonw e don't support windows process emulation */
274	static struct CoroSLF slf_frame; /* the current slf frame */	267	static struct CoroSLF slf_frame; /* the current slf frame */
		268	static SV *coro_throw;
275		269
276	/ Coro ******************************************************************/	270	/ Coro ******************************************************************/
277		271
278	#define PRIO_MAX 3	272	#define PRIO_MAX 3
279	#define PRIO_HIGH 1	273	#define PRIO_HIGH 1
…		…
380	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	374	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
381		375
382	return 0;	376	return 0;
383	}	377	}
384		378
385	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	379	#define CORO_MAGIC_type_cv 26
386	#define CORO_MAGIC_type_state PERL_MAGIC_ext	380	#define CORO_MAGIC_type_state PERL_MAGIC_ext
387		381
388	static MGVTBL coro_cv_vtbl = {	382	static MGVTBL coro_cv_vtbl = {
389	0, 0, 0, 0,	383	0, 0, 0, 0,
390	coro_cv_free	384	coro_cv_free
391	};	385	};
392		386
		387	#define CORO_MAGIC_NN(sv, type) \
		388	(expect_true (SvMAGIC (sv)->mg_type == type) \
		389	? SvMAGIC (sv) \
		390	: mg_find (sv, type))
		391
393	#define CORO_MAGIC(sv, type) \	392	#define CORO_MAGIC(sv, type) \
394	expect_true (SvMAGIC (sv)) \	393	(expect_true (SvMAGIC (sv)) \
395	? expect_true (SvMAGIC (sv)->mg_type == type) \	394	? CORO_MAGIC_NN (sv, type) \
396	? SvMAGIC (sv) \
397	: mg_find (sv, type) \
398	: 0	395	: 0)
399		396
400	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	397	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
401	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	398	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
402		399
403	INLINE struct coro *	400	INLINE struct coro *
404	SvSTATE_ (pTHX_ SV *coro)	401	SvSTATE_ (pTHX_ SV *coro)
405	{	402	{
406	HV *stash;	403	HV *stash;
…		…
424	return (struct coro *)mg->mg_ptr;	421	return (struct coro *)mg->mg_ptr;
425	}	422	}
426		423
427	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	424	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
428		425
429	/* fastert than SvSTATE, but expects a coroutine hv */	426	/* faster than SvSTATE, but expects a coroutine hv */
430	INLINE struct coro *	427	#define SvSTATE_hv(hv) ((struct coro )CORO_MAGIC_NN ((SV )hv, CORO_MAGIC_type_state)->mg_ptr)
431	SvSTATE_hv (SV *sv)
432	{
433	MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
434	? SvMAGIC (sv)
435	: mg_find (sv, CORO_MAGIC_type_state);
436
437	return (struct coro *)mg->mg_ptr;
438	}
439
440	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))	428	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
441		429
442	/* the next two functions merely cache the padlists */	430	/* the next two functions merely cache the padlists */
443	static void	431	static void
444	get_padlist (pTHX_ CV *cv)	432	get_padlist (pTHX_ CV *cv)
…		…
513	}	501	}
514		502
515	PUTBACK;	503	PUTBACK;
516	}	504	}
517		505
518	slf_frame = c->slf_frame;	506	slf_frame = c->slf_frame;
		507	coro_throw = c->throw;
519	}	508	}
520		509
521	static void	510	static void
522	save_perl (pTHX_ Coro__State c)	511	save_perl (pTHX_ Coro__State c)
523	{	512	{
		513	c->throw = coro_throw;
524	c->slf_frame = slf_frame;	514	c->slf_frame = slf_frame;
525		515
526	{	516	{
527	dSP;	517	dSP;
528	I32 cxix = cxstack_ix;	518	I32 cxix = cxstack_ix;
…		…
821	slf_check_nop (pTHX_ struct CoroSLF *frame)	811	slf_check_nop (pTHX_ struct CoroSLF *frame)
822	{	812	{
823	return 0;	813	return 0;
824	}	814	}
825		815
826	static void	816	static void NOINLINE /* noinline to keep it out of the transfer fast path */
827	coro_setup (pTHX_ struct coro *coro)	817	coro_setup (pTHX_ struct coro *coro)
828	{	818	{
829	/*	819	/*
830	* emulate part of the perl startup here.	820	* emulate part of the perl startup here.
831	*/	821	*/
…		…
874	/* this newly created coroutine might be run on an existing cctx which most	864	/* this newly created coroutine might be run on an existing cctx which most
875	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.	865	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
876	*/	866	*/
877	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */	867	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
878	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */	868	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		869
		870	coro_throw = coro->throw;
879	}	871	}
880		872
881	static void	873	static void
882	coro_destruct (pTHX_ struct coro *coro)	874	coro_destruct (pTHX_ struct coro *coro)
883	{	875	{
…		…
907		899
908	SvREFCNT_dec (PL_diehook);	900	SvREFCNT_dec (PL_diehook);
909	SvREFCNT_dec (PL_warnhook);	901	SvREFCNT_dec (PL_warnhook);
910		902
911	SvREFCNT_dec (coro->saved_deffh);	903	SvREFCNT_dec (coro->saved_deffh);
912	SvREFCNT_dec (coro->throw);	904	SvREFCNT_dec (coro_throw);
913		905
914	coro_destruct_stacks (aTHX);	906	coro_destruct_stacks (aTHX);
915	}	907	}
916		908
917	INLINE void	909	INLINE void
…		…
1276	/ coroutine switching ***************************************************/	1268	/ coroutine switching ***************************************************/
1277		1269
1278	static void	1270	static void
1279	transfer_check (pTHX_ struct coro prev, struct coro next)	1271	transfer_check (pTHX_ struct coro prev, struct coro next)
1280	{	1272	{
		1273	/* TODO: throwing up here is considered harmful */
		1274
1281	if (expect_true (prev != next))	1275	if (expect_true (prev != next))
1282	{	1276	{
1283	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))	1277	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
1284	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");	1278	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1285		1279
…		…
1295	#endif	1289	#endif
1296	}	1290	}
1297	}	1291	}
1298		1292
1299	/* always use the TRANSFER macro */	1293	/* always use the TRANSFER macro */
1300	static void NOINLINE	1294	static void NOINLINE /* noinline so we have a fixed stackframe */
1301	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)	1295	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
1302	{	1296	{
1303	dSTACKLEVEL;	1297	dSTACKLEVEL;
1304		1298
1305	/* sometimes transfer is only called to set idle_sp */	1299	/* sometimes transfer is only called to set idle_sp */
…		…
1687	if (coro->flags & CF_RUNNING)	1681	if (coro->flags & CF_RUNNING)
1688	PL_runops = RUNOPS_DEFAULT;	1682	PL_runops = RUNOPS_DEFAULT;
1689	else	1683	else
1690	coro->slot->runops = RUNOPS_DEFAULT;	1684	coro->slot->runops = RUNOPS_DEFAULT;
1691	}	1685	}
		1686	}
		1687
		1688	/*****************************************************************************/
		1689	/* schedule-like-function opcode (SLF) */
		1690
		1691	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1692	static const CV *slf_cv;
		1693	static SV **slf_argv;
		1694	static int slf_argc, slf_arga; /* count, allocated */
		1695	static I32 slf_ax; /* top of stack, for restore */
		1696
		1697	/* this restores the stack in the case we patched the entersub, to */
		1698	/* recreate the stack frame as perl will on following calls */
		1699	/* since entersub cleared the stack */
		1700	static OP *
		1701	pp_restore (pTHX)
		1702	{
		1703	int i;
		1704	SV **SP = PL_stack_base + slf_ax;
		1705
		1706	PUSHMARK (SP);
		1707
		1708	EXTEND (SP, slf_argc + 1);
		1709
		1710	for (i = 0; i < slf_argc; ++i)
		1711	PUSHs (sv_2mortal (slf_argv [i]));
		1712
		1713	PUSHs ((SV *)CvGV (slf_cv));
		1714
		1715	RETURNOP (slf_restore.op_first);
		1716	}
		1717
		1718	static void
		1719	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1720	{
		1721	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1722	}
		1723
		1724	static void
		1725	slf_init_set_stacklevel (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1726	{
		1727	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1728
		1729	frame->prepare = slf_prepare_set_stacklevel;
		1730	frame->check = slf_check_nop;
		1731	frame->data = (void *)SvIV (arg [0]);
		1732	}
		1733
		1734	static void
		1735	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1736	{
		1737	SV arg = (SV )slf_frame.data;
		1738
		1739	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1740	}
		1741
		1742	static void
		1743	slf_init_transfer (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1744	{
		1745	if (items != 2)
		1746	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1747
		1748	frame->prepare = slf_prepare_transfer;
		1749	frame->check = slf_check_nop;
		1750	frame->data = (void )arg; / let's hope it will stay valid */
		1751	}
		1752
		1753	static void
		1754	slf_init_schedule (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1755	{
		1756	frame->prepare = prepare_schedule;
		1757	frame->check = slf_check_nop;
		1758	}
		1759
		1760	static void
		1761	slf_init_cede (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1762	{
		1763	frame->prepare = prepare_cede;
		1764	frame->check = slf_check_nop;
		1765	}
		1766
		1767	static void
		1768	slf_init_cede_notself (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1769	{
		1770	frame->prepare = prepare_cede_notself;
		1771	frame->check = slf_check_nop;
		1772	}
		1773
		1774	/* we hijack an hopefully unused CV flag for our purposes */
		1775	#define CVf_SLF 0x4000
		1776
		1777	/*
		1778	* these not obviously related functions are all rolled into one
		1779	* function to increase chances that they all will call transfer with the same
		1780	* stack offset
		1781	* SLF stands for "schedule-like-function".
		1782	*/
		1783	static OP *
		1784	pp_slf (pTHX)
		1785	{
		1786	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1787
		1788	/* set up the slf frame, unless it has already been set-up */
		1789	/* the latter happens when a new coro has been started */
		1790	/* or when a new cctx was attached to an existing coroutine */
		1791	if (expect_true (!slf_frame.prepare))
		1792	{
		1793	/* first iteration */
		1794	dSP;
		1795	SV **arg = PL_stack_base + TOPMARK + 1;
		1796	int items = SP - arg; /* args without function object */
		1797	SV gv = sp;
		1798
		1799	/* do a quick consistency check on the "function" object, and if it isn't */
		1800	/* for us, divert to the real entersub */
		1801	if (SvTYPE (gv) != SVt_PVGV
		1802	\|\| !GvCV (gv)
		1803	\|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1804	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1805
		1806	if (!(PL_op->op_flags & OPf_STACKED))
		1807	{
		1808	/* ampersand-form of call, use @_ instead of stack */
		1809	AV *av = GvAV (PL_defgv);
		1810	arg = AvARRAY (av);
		1811	items = AvFILLp (av) + 1;
		1812	}
		1813
		1814	/* now call the init function, which needs to set up slf_frame */
		1815	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1816	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1817
		1818	/* pop args */
		1819	SP = PL_stack_base + POPMARK;
		1820
		1821	PUTBACK;
		1822	}
		1823
		1824	/* now that we have a slf_frame, interpret it! */
		1825	/* we use a callback system not to make the code needlessly */
		1826	/* complicated, but so we can run multiple perl coros from one cctx */
		1827
		1828	do
		1829	{
		1830	struct coro_transfer_args ta;
		1831
		1832	slf_frame.prepare (aTHX_ &ta);
		1833	TRANSFER (ta, 0);
		1834
		1835	checkmark = PL_stack_sp - PL_stack_base;
		1836	}
		1837	while (slf_frame.check (aTHX_ &slf_frame));
		1838
		1839	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1840
		1841	/* return value handling - mostly like entersub */
		1842	{
		1843	dSP;
		1844	SV **bot = PL_stack_base + checkmark;
		1845	int gimme = GIMME_V;
		1846
		1847	/* make sure we put something on the stack in scalar context */
		1848	if (gimme == G_SCALAR)
		1849	{
		1850	if (sp == bot)
		1851	XPUSHs (&PL_sv_undef);
		1852
		1853	SP = bot + 1;
		1854	}
		1855
		1856	PUTBACK;
		1857	}
		1858
		1859	/* exception handling */
		1860	if (expect_false (coro_throw))
		1861	{
		1862	SV *exception = sv_2mortal (coro_throw);
		1863
		1864	coro_throw = 0;
		1865	sv_setsv (ERRSV, exception);
		1866	croak (0);
		1867	}
		1868
		1869	return NORMAL;
		1870	}
		1871
		1872	static void
		1873	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1874	{
		1875	int i;
		1876	SV **arg = PL_stack_base + ax;
		1877	int items = PL_stack_sp - arg + 1;
		1878
		1879	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1880
		1881	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1882	&& PL_op->op_ppaddr != pp_slf)
		1883	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1884
		1885	CvFLAGS (cv) \|= CVf_SLF;
		1886	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1887	slf_cv = cv;
		1888
		1889	/* we patch the op, and then re-run the whole call */
		1890	/* we have to put the same argument on the stack for this to work */
		1891	/* and this will be done by pp_restore */
		1892	slf_restore.op_next = (OP *)&slf_restore;
		1893	slf_restore.op_type = OP_CUSTOM;
		1894	slf_restore.op_ppaddr = pp_restore;
		1895	slf_restore.op_first = PL_op;
		1896
		1897	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1898
		1899	if (PL_op->op_flags & OPf_STACKED)
		1900	{
		1901	if (items > slf_arga)
		1902	{
		1903	slf_arga = items;
		1904	free (slf_argv);
		1905	slf_argv = malloc (slf_arga * sizeof (SV *));
		1906	}
		1907
		1908	slf_argc = items;
		1909
		1910	for (i = 0; i < items; ++i)
		1911	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1912	}
		1913	else
		1914	slf_argc = 0;
		1915
		1916	PL_op->op_ppaddr = pp_slf;
		1917	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1918
		1919	PL_op = (OP *)&slf_restore;
1692	}	1920	}
1693		1921
1694	/*****************************************************************************/	1922	/*****************************************************************************/
1695	/* PerlIO::cede */	1923	/* PerlIO::cede */
1696		1924
…		…
1765	PerlIOBuf_get_cnt,	1993	PerlIOBuf_get_cnt,
1766	PerlIOBuf_set_ptrcnt,	1994	PerlIOBuf_set_ptrcnt,
1767	};	1995	};
1768		1996
1769	/*****************************************************************************/	1997	/*****************************************************************************/
1770		1998	/* Coro::Semaphore */
1771	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1772	static const CV *slf_cv;
1773	static SV *slf_arg0;
1774	static SV *slf_arg1;
1775	static SV *slf_arg2;
1776	static I32 slf_ax; /* top of stack, for restore */
1777
1778	/* this restores the stack in the case we patched the entersub, to */
1779	/* recreate the stack frame as perl will on following calls */
1780	/* since entersub cleared the stack */
1781	static OP *
1782	pp_restore (pTHX)
1783	{
1784	SV **SP = PL_stack_base + slf_ax;
1785
1786	PUSHMARK (SP);
1787
1788	EXTEND (SP, 3);
1789	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1790	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1791	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1792	PUSHs ((SV *)CvGV (slf_cv));
1793
1794	RETURNOP (slf_restore.op_first);
1795	}
1796
1797	static void
1798	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1799	{
1800	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1801	}
1802
1803	static void
1804	slf_init_set_stacklevel (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
1805	{
1806	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1807
1808	frame->prepare = slf_prepare_set_stacklevel;
1809	frame->check = slf_check_nop;
1810	frame->data = (void *)SvIV (arg [0]);
1811	}
1812
1813	static void
1814	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1815	{
1816	SV arg = (SV )slf_frame.data;
1817
1818	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1819
1820	/* if the destination has ->throw set, then copy it */
1821	/* into the current coro's throw slot, so it will be raised */
1822	/* after the schedule */
1823	if (expect_false (ta->next->throw))
1824	{
1825	struct coro *coro = SvSTATE_current;
1826	SvREFCNT_dec (coro->throw);
1827	coro->throw = ta->next->throw;
1828	ta->next->throw = 0;
1829	}
1830	}
1831
1832	static void
1833	slf_init_transfer (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
1834	{
1835	if (items != 2)
1836	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838	frame->prepare = slf_prepare_transfer;
1839	frame->check = slf_check_nop;
1840	frame->data = (void )arg; / let's hope it will stay valid */
1841	}
1842
1843	static void
1844	slf_init_schedule (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
1845	{
1846	frame->prepare = prepare_schedule;
1847	frame->check = slf_check_nop;
1848	}
1849
1850	static void
1851	slf_init_cede (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
1852	{
1853	frame->prepare = prepare_cede;
1854	frame->check = slf_check_nop;
1855	}
1856
1857	static void
1858	slf_init_cede_notself (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
1859	{
1860	frame->prepare = prepare_cede_notself;
1861	frame->check = slf_check_nop;
1862	}
1863
1864	/* we hijack an hopefully unused CV flag for our purposes */
1865	#define CVf_SLF 0x4000
1866
1867	/*
1868	* these not obviously related functions are all rolled into one
1869	* function to increase chances that they all will call transfer with the same
1870	* stack offset
1871	* SLF stands for "schedule-like-function".
1872	*/
1873	static OP *
1874	pp_slf (pTHX)
1875	{
1876	I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878	/* set up the slf frame, unless it has already been set-up */
1879	/* the latter happens when a new coro has been started */
1880	/* or when a new cctx was attached to an existing coroutine */
1881	if (expect_true (!slf_frame.prepare))
1882	{
1883	/* first iteration */
1884	dSP;
1885	SV **arg = PL_stack_base + TOPMARK + 1;
1886	int items = SP - arg; /* args without function object */
1887	SV gv = sp;
1888
1889	/* do a quick consistency check on the "function" object, and if it isn't */
1890	/* for us, divert to the real entersub */
1891	if (SvTYPE (gv) != SVt_PVGV \|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892	return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894	if (!(PL_op->op_flags & OPf_STACKED))
1895	{
1896	/* ampersand-form of call, use @_ instead of stack */
1897	AV *av = GvAV (PL_defgv);
1898	arg = AvARRAY (av);
1899	items = AvFILLp (av) + 1;
1900	}
1901
1902	/* now call the init function, which needs to set up slf_frame */
1903	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904	(aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906	/* pop args */
1907	SP = PL_stack_base + POPMARK;
1908
1909	PUTBACK;
1910	}
1911
1912	/* now that we have a slf_frame, interpret it! */
1913	/* we use a callback system not to make the code needlessly */
1914	/* complicated, but so we can run multiple perl coros from one cctx */
1915
1916	do
1917	{
1918	struct coro_transfer_args ta;
1919
1920	slf_frame.prepare (aTHX_ &ta);
1921	TRANSFER (ta, 0);
1922
1923	checkmark = PL_stack_sp - PL_stack_base;
1924	}
1925	while (slf_frame.check (aTHX_ &slf_frame));
1926
1927	{
1928	dSP;
1929	SV **bot = PL_stack_base + checkmark;
1930	int gimme = GIMME_V;
1931
1932	slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1933
1934	/* make sure we put something on the stack in scalar context */
1935	if (gimme == G_SCALAR)
1936	{
1937	if (sp == bot)
1938	XPUSHs (&PL_sv_undef);
1939
1940	SP = bot + 1;
1941	}
1942
1943	PUTBACK;
1944	}
1945
1946	{
1947	struct coro *coro = SvSTATE_current;
1948
1949	if (expect_false (coro->throw))
1950	{
1951	SV *exception = sv_2mortal (coro->throw);
1952
1953	coro->throw = 0;
1954	sv_setsv (ERRSV, exception);
1955	croak (0);
1956	}
1957	}
1958
1959	return NORMAL;
1960	}
1961
1962	static void
1963	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1964	{
1965	SV **arg = PL_stack_base + ax;
1966	int items = PL_stack_sp - arg + 1;
1967
1968	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1969
1970	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1971	&& PL_op->op_ppaddr != pp_slf)
1972	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1973
1974	#if 0
1975	if (items > 3)
1976	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1977	#endif
1978
1979	CvFLAGS (cv) \|= CVf_SLF;
1980	CvXSUBANY (cv).any_ptr = (void *)init_cb;
1981	slf_cv = cv;
1982
1983	/* we patch the op, and then re-run the whole call */
1984	/* we have to put the same argument on the stack for this to work */
1985	/* and this will be done by pp_restore */
1986	slf_restore.op_next = (OP *)&slf_restore;
1987	slf_restore.op_type = OP_CUSTOM;
1988	slf_restore.op_ppaddr = pp_restore;
1989	slf_restore.op_first = PL_op;
1990
1991	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1992	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1993	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1994	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1995
1996	PL_op->op_ppaddr = pp_slf;
1997	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1998
1999	PL_op = (OP *)&slf_restore;
2000	}
2001
2002	/*****************************************************************************/
2003		1999
2004	static void	2000	static void
2005	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)	2001	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2006	{	2002	{
2007	SV *count_sv = AvARRAY (av)[0];	2003	SV *count_sv = AvARRAY (av)[0];
…		…
2093	frame->check = slf_check_semaphore_down;	2089	frame->check = slf_check_semaphore_down;
2094		2090
2095	}	2091	}
2096		2092
2097	/*****************************************************************************/	2093	/*****************************************************************************/
		2094	/* gensub: simple closure generation utility */
2098		2095
2099	#define GENSUB_ARG CvXSUBANY (cv).any_ptr	2096	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2100		2097
2101	/* create a closure from XS, returns a code reference */	2098	/* create a closure from XS, returns a code reference */
2102	/* the arg can be accessed via GENSUB_ARG from the callback */	2099	/* the arg can be accessed via GENSUB_ARG from the callback */
2103	/* the callback must use dXSARGS/XSRETURN */	2100	/* the callback must use dXSARGS/XSRETURN */
2104	static SV *	2101	static SV *
2105	gensub (pTHX_ void (xsub)(pTHX_ CV ), void *arg)	2102	gensub (pTHX_ void (xsub)(pTHX_ CV ), void *arg)
2106	{	2103	{
2107	CV cv = (CV )NEWSV (0, 0);	2104	CV cv = (CV )newSV (0);
2108		2105
2109	sv_upgrade ((SV *)cv, SVt_PVCV);	2106	sv_upgrade ((SV *)cv, SVt_PVCV);
2110		2107
2111	CvANON_on (cv);	2108	CvANON_on (cv);
2112	CvISXSUB_on (cv);	2109	CvISXSUB_on (cv);
2113	CvXSUB (cv) = xsub;	2110	CvXSUB (cv) = xsub;
2114	GENSUB_ARG = arg;	2111	GENSUB_ARG = arg;
2115		2112
2116	return newRV_noinc ((SV *)cv);	2113	return newRV_noinc ((SV *)cv);
		2114	}
		2115
		2116	/*****************************************************************************/
		2117	/* Coro::AIO */
		2118
		2119	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2120
		2121	/* helper storage struct */
		2122	struct io_state
		2123	{
		2124	int errorno;
		2125	I32 laststype; /* U16 in 5.10.0 */
		2126	int laststatval;
		2127	Stat_t statcache;
		2128	};
		2129
		2130	static void
		2131	coro_aio_callback (pTHX_ CV *cv)
		2132	{
		2133	dXSARGS;
		2134	AV state = (AV )GENSUB_ARG;
		2135	SV *coro = av_pop (state);
		2136	SV *data_sv = newSV (sizeof (struct io_state));
		2137
		2138	av_extend (state, items);
		2139
		2140	sv_upgrade (data_sv, SVt_PV);
		2141	SvCUR_set (data_sv, sizeof (struct io_state));
		2142	SvPOK_only (data_sv);
		2143
		2144	{
		2145	struct io_state data = (struct io_state )SvPVX (data_sv);
		2146
		2147	data->errorno = errno;
		2148	data->laststype = PL_laststype;
		2149	data->laststatval = PL_laststatval;
		2150	data->statcache = PL_statcache;
		2151	}
		2152
		2153	/* now build the result vector out of all the parameters and the data_sv */
		2154	{
		2155	int i;
		2156
		2157	for (i = 0; i < items; ++i)
		2158	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2159	}
		2160
		2161	av_push (state, data_sv);
		2162
		2163	api_ready (aTHX_ coro);
		2164	SvREFCNT_dec (coro);
		2165	SvREFCNT_dec ((AV *)state);
		2166	}
		2167
		2168	static int
		2169	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2170	{
		2171	AV state = (AV )frame->data;
		2172
		2173	/* one element that is an RV? repeat! */
		2174	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2175	return 1;
		2176
		2177	/* restore status */
		2178	{
		2179	SV *data_sv = av_pop (state);
		2180	struct io_state data = (struct io_state )SvPVX (data_sv);
		2181
		2182	errno = data->errorno;
		2183	PL_laststype = data->laststype;
		2184	PL_laststatval = data->laststatval;
		2185	PL_statcache = data->statcache;
		2186
		2187	SvREFCNT_dec (data_sv);
		2188	}
		2189
		2190	/* push result values */
		2191	{
		2192	dSP;
		2193	int i;
		2194
		2195	EXTEND (SP, AvFILLp (state) + 1);
		2196	for (i = 0; i <= AvFILLp (state); ++i)
		2197	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2198
		2199	PUTBACK;
		2200	}
		2201
		2202	return 0;
		2203	}
		2204
		2205	static void
		2206	slf_init_aio_req (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2207	{
		2208	AV state = (AV )sv_2mortal ((SV *)newAV ());
		2209	SV *coro_hv = SvRV (coro_current);
		2210	struct coro *coro = SvSTATE_hv (coro_hv);
		2211
		2212	/* put our coroutine id on the state arg */
		2213	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2214
		2215	/* first see whether we have a non-zero priority and set it as AIO prio */
		2216	if (coro->prio)
		2217	{
		2218	dSP;
		2219
		2220	static SV *prio_cv;
		2221	static SV *prio_sv;
		2222
		2223	if (expect_false (!prio_cv))
		2224	{
		2225	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2226	prio_sv = newSViv (0);
		2227	}
		2228
		2229	PUSHMARK (SP);
		2230	sv_setiv (prio_sv, coro->prio);
		2231	XPUSHs (prio_sv);
		2232
		2233	PUTBACK;
		2234	call_sv (prio_cv, G_VOID \| G_DISCARD);
		2235	}
		2236
		2237	/* now call the original request */
		2238	{
		2239	dSP;
		2240	CV req = (CV )CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2241	int i;
		2242
		2243	PUSHMARK (SP);
		2244
		2245	/* first push all args to the stack */
		2246	EXTEND (SP, items + 1);
		2247
		2248	for (i = 0; i < items; ++i)
		2249	PUSHs (arg [i]);
		2250
		2251	/* now push the callback closure */
		2252	PUSHs (sv_2mortal (gensub (coro_aio_callback, (void )SvREFCNT_inc_NN ((SV )state))));
		2253
		2254	/* now call the AIO function - we assume our request is uncancelable */
		2255	PUTBACK;
		2256	call_sv ((SV *)req, G_VOID \| G_DISCARD);
		2257	}
		2258
		2259	/* now that the requets is going, we loop toll we have a result */
		2260	frame->data = (void *)state;
		2261	frame->prepare = prepare_schedule;
		2262	frame->check = slf_check_aio_req;
		2263	}
		2264
		2265	static void
		2266	coro_aio_req_xs (pTHX_ CV *cv)
		2267	{
		2268	dVAR;
		2269	dXSARGS;
		2270
		2271	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2272
		2273	XSRETURN_EMPTY;
2117	}	2274	}
2118		2275
2119	/*****************************************************************************/	2276	/*****************************************************************************/
2120		2277
2121	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2278	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
…		…
2355		2512
2356	void	2513	void
2357	throw (Coro::State self, SV *throw = &PL_sv_undef)	2514	throw (Coro::State self, SV *throw = &PL_sv_undef)
2358	PROTOTYPE: $;$	2515	PROTOTYPE: $;$
2359	CODE:	2516	CODE:
		2517	{
		2518	struct coro *current = SvSTATE_current;
		2519	SV **throwp = self == current ? &coro_throw : &self->throw;
2360	SvREFCNT_dec (self->throw);	2520	SvREFCNT_dec (*throwp);
2361	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2521	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2522	}
2362		2523
2363	void	2524	void
2364	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2525	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
2365	PROTOTYPE: $;$	2526	PROTOTYPE: $;$
2366	C_ARGS: aTHX_ coro, flags	2527	C_ARGS: aTHX_ coro, flags
…		…
2415	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;	2576	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
2416		2577
2417	SV tmp = src; src = dst; *dst = tmp;	2578	SV tmp = src; src = dst; *dst = tmp;
2418	}	2579	}
2419		2580
		2581
2420	MODULE = Coro::State PACKAGE = Coro	2582	MODULE = Coro::State PACKAGE = Coro
2421		2583
2422	BOOT:	2584	BOOT:
2423	{	2585	{
2424	int i;	2586	int i;
…		…
2568		2730
2569	void	2731	void
2570	_pool_2 (SV *cb)	2732	_pool_2 (SV *cb)
2571	CODE:	2733	CODE:
2572	{	2734	{
2573	struct coro *coro = SvSTATE_current;	2735	HV hv = (HV )SvRV (coro_current);
		2736	struct coro coro = SvSTATE_hv ((SV )hv);
2574		2737
2575	sv_setsv (cb, &PL_sv_undef);	2738	sv_setsv (cb, &PL_sv_undef);
2576		2739
2577	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;	2740	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
2578	coro->saved_deffh = 0;	2741	coro->saved_deffh = 0;
…		…
2585	SvREFCNT_dec (old);	2748	SvREFCNT_dec (old);
2586	croak ("\3async_pool terminate\2\n");	2749	croak ("\3async_pool terminate\2\n");
2587	}	2750	}
2588		2751
2589	av_clear (GvAV (PL_defgv));	2752	av_clear (GvAV (PL_defgv));
2590	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2753	hv_store (hv, "desc", sizeof ("desc") - 1,
2591	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2754	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2592		2755
2593	coro->prio = 0;	2756	coro->prio = 0;
2594		2757
2595	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2758	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
…		…
2597		2760
2598	av_push (av_async_pool, newSVsv (coro_current));	2761	av_push (av_async_pool, newSVsv (coro_current));
2599	}	2762	}
2600		2763
2601		2764
2602	MODULE = Coro::State PACKAGE = Coro::AIO
2603
2604	void
2605	_get_state (SV *self)
2606	PROTOTYPE: $
2607	PPCODE:
2608	{
2609	AV *defav = GvAV (PL_defgv);
2610	AV *av = newAV ();
2611	int i;
2612	SV *data_sv = newSV (sizeof (struct io_state));
2613	struct io_state data = (struct io_state )SvPVX (data_sv);
2614	SvCUR_set (data_sv, sizeof (struct io_state));
2615	SvPOK_only (data_sv);
2616
2617	data->errorno = errno;
2618	data->laststype = PL_laststype;
2619	data->laststatval = PL_laststatval;
2620	data->statcache = PL_statcache;
2621
2622	av_extend (av, AvFILLp (defav) + 1 + 1);
2623
2624	for (i = 0; i <= AvFILLp (defav); ++i)
2625	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2626
2627	av_push (av, data_sv);
2628
2629	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2630
2631	api_ready (aTHX_ self);
2632	}
2633
2634	void
2635	_set_state (SV *state)
2636	PROTOTYPE: $
2637	PPCODE:
2638	{
2639	AV av = (AV )SvRV (state);
2640	struct io_state data = (struct io_state )SvPVX (AvARRAY (av)[AvFILLp (av)]);
2641	int i;
2642
2643	errno = data->errorno;
2644	PL_laststype = data->laststype;
2645	PL_laststatval = data->laststatval;
2646	PL_statcache = data->statcache;
2647
2648	EXTEND (SP, AvFILLp (av));
2649	for (i = 0; i < AvFILLp (av); ++i)
2650	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2651	}
2652
2653
2654	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2655
2656	BOOT:
2657	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2658
2659	void
2660	_schedule (...)
2661	CODE:
2662	{
2663	static int incede;
2664
2665	api_cede_notself (aTHX);
2666
2667	++incede;
2668	while (coro_nready >= incede && api_cede (aTHX))
2669	;
2670
2671	sv_setsv (sv_activity, &PL_sv_undef);
2672	if (coro_nready >= incede)
2673	{
2674	PUSHMARK (SP);
2675	PUTBACK;
2676	call_pv ("Coro::AnyEvent::_activity", G_DISCARD \| G_EVAL);
2677	SPAGAIN;
2678	}
2679
2680	--incede;
2681	}
2682
2683
2684	MODULE = Coro::State PACKAGE = PerlIO::cede	2765	MODULE = Coro::State PACKAGE = PerlIO::cede
2685		2766
2686	BOOT:	2767	BOOT:
2687	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2768	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2769
2688		2770
2689	MODULE = Coro::State PACKAGE = Coro::Semaphore	2771	MODULE = Coro::State PACKAGE = Coro::Semaphore
2690		2772
2691	SV *	2773	SV *
2692	new (SV klass, SV count_ = 0)	2774	new (SV klass, SV count_ = 0)
…		…
2752	for (i = 1; i <= AvFILLp (av); ++i)	2834	for (i = 1; i <= AvFILLp (av); ++i)
2753	PUSHs (newSVsv (AvARRAY (av)[i]));	2835	PUSHs (newSVsv (AvARRAY (av)[i]));
2754	}	2836	}
2755	}	2837	}
2756		2838
		2839
		2840	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2841
		2842	BOOT:
		2843	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2844
		2845	void
		2846	_schedule (...)
		2847	CODE:
		2848	{
		2849	static int incede;
		2850
		2851	api_cede_notself (aTHX);
		2852
		2853	++incede;
		2854	while (coro_nready >= incede && api_cede (aTHX))
		2855	;
		2856
		2857	sv_setsv (sv_activity, &PL_sv_undef);
		2858	if (coro_nready >= incede)
		2859	{
		2860	PUSHMARK (SP);
		2861	PUTBACK;
		2862	call_pv ("Coro::AnyEvent::_activity", G_DISCARD \| G_EVAL);
		2863	SPAGAIN;
		2864	}
		2865
		2866	--incede;
		2867	}
		2868
		2869
		2870	MODULE = Coro::State PACKAGE = Coro::AIO
		2871
		2872	void
		2873	_register (char target, char proto, SV *req)
		2874	CODE:
		2875	{
		2876	HV *st;
		2877	GV *gvp;
		2878	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		2879	CV *slf_cv = newXSproto (target, coro_aio_req_xs, __FILE__, proto);
		2880	sv_magicext ((SV )slf_cv, (SV )req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		2881	}
		2882

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Comparing Coro/Coro/State.xs (file contents): Revision 1.284 by root, Mon Nov 17 01:05:47 2008 UTC vs. Revision 1.287 by root, Mon Nov 17 07:03:12 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.284 by root, Mon Nov 17 01:05:47 2008 UTC vs.
Revision 1.287 by root, Mon Nov 17 07:03:12 2008 UTC