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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.275 by root, Sat Nov 15 06:26:52 2008 UTC vs.
Revision 1.298 by root, Tue Nov 18 23:20:41 2008 UTC

…		…
95	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
96	#endif	96	#endif
97	#ifndef newSV	97	#ifndef newSV
98	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
99	#endif	99	#endif
		100	#ifndef CvISXSUB_on
		101	# define CvISXSUB_on(cv) (void)cv
		102	#endif
100		103
101	/* 5.8.7 */	104	/* 5.8.7 */
102	#ifndef SvRV_set	105	#ifndef SvRV_set
103	# define SvRV_set(s,v) SvRV(s) = (v)	106	# define SvRV_set(s,v) SvRV(s) = (v)
104	#endif	107	#endif
…		…
117	#endif	120	#endif
118		121
119	/* The next macros try to return the current stack pointer, in an as	122	/* The next macros try to return the current stack pointer, in an as
120	* portable way as possible. */	123	* portable way as possible. */
121	#if __GNUC__ >= 4	124	#if __GNUC__ >= 4
		125	# define dSTACKLEVEL int stacklevel_dummy
122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)	126	# define STACKLEVEL __builtin_frame_address (0)
123	#else	127	#else
124	# define dSTACKLEVEL volatile void stacklevel = (volatile void )&stacklevel	128	# define dSTACKLEVEL volatile void *stacklevel
		129	# define STACKLEVEL ((void *)&stacklevel)
125	#endif	130	#endif
126		131
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	132	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		133
129	#if __GNUC__ >= 3	134	#if __GNUC__ >= 3
…		…
140	#define expect_true(expr) expect ((expr) != 0, 1)	145	#define expect_true(expr) expect ((expr) != 0, 1)
141		146
142	#define NOINLINE attribute ((noinline))	147	#define NOINLINE attribute ((noinline))
143		148
144	#include "CoroAPI.h"	149	#include "CoroAPI.h"
		150	#define GCoroAPI (&coroapi) /* very sneaky */
145		151
146	#ifdef USE_ITHREADS	152	#ifdef USE_ITHREADS
147
148	static perl_mutex coro_lock;
149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151	# if CORO_PTHREAD	153	# if CORO_PTHREAD
152	static void *coro_thx;	154	static void *coro_thx;
153	# endif	155	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	156	#endif
161
162	# undef LOCK
163	# define LOCK (void)0
164	# undef UNLOCK
165	# define UNLOCK (void)0
166
167	/* helper storage struct for Coro::AIO */
168	struct io_state
169	{
170	AV *res;
171	int errorno;
172	I32 laststype; /* U16 in 5.10.0 */
173	int laststatval;
174	Stat_t statcache;
175	};
176		157
177	static double (nvtime)(); / so why doesn't it take void? */	158	static double (nvtime)(); / so why doesn't it take void? */
		159
		160	/* we hijack an hopefully unused CV flag for our purposes */
		161	#define CVf_SLF 0x4000
		162	static OP *pp_slf (pTHX);
178		163
179	static U32 cctx_gen;	164	static U32 cctx_gen;
180	static size_t cctx_stacksize = CORO_STACKSIZE;	165	static size_t cctx_stacksize = CORO_STACKSIZE;
181	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
182	static AV main_mainstack; / used to differentiate between $main and others */	167	static AV main_mainstack; / used to differentiate between $main and others */
183	static JMPENV *main_top_env;	168	static JMPENV *main_top_env;
184	static HV coro_state_stash, coro_stash;	169	static HV coro_state_stash, coro_stash;
185	static volatile SV coro_mortal; / will be freed/thrown after next transfer */	170	static volatile SV coro_mortal; / will be freed/thrown after next transfer */
186	static volatile struct coro *transfer_next;
187		171
188	static GV irsgv; / $/ */	172	static GV irsgv; / $/ */
189	static GV stdoutgv; / STDOUT /	173	static GV stdoutgv; / STDOUT /
190	static SV *rv_diehook;	174	static SV *rv_diehook;
191	static SV *rv_warnhook;	175	static SV *rv_warnhook;
…		…
257	/* this is a structure representing a perl-level coroutine */	241	/* this is a structure representing a perl-level coroutine */
258	struct coro {	242	struct coro {
259	/* the C coroutine allocated to this perl coroutine, if any */	243	/* the C coroutine allocated to this perl coroutine, if any */
260	coro_cctx *cctx;	244	coro_cctx *cctx;
261		245
262	/* process data */	246	/* state data */
263	struct CoroSLF slf_frame; /* saved slf frame */	247	struct CoroSLF slf_frame; /* saved slf frame */
264	AV *mainstack;	248	AV *mainstack;
265	perl_slots slot; / basically the saved sp */	249	perl_slots slot; / basically the saved sp */
266		250
267	AV args; / data associated with this coroutine (initial args) */	251	AV args; / data associated with this coroutine (initial args) */
268	int refcnt; /* coroutines are refcounted, yes */	252	int refcnt; /* coroutines are refcounted, yes */
269	int flags; /* CF_ flags */	253	int flags; /* CF_ flags */
270	HV hv; / the perl hash associated with this coro, if any */	254	HV hv; / the perl hash associated with this coro, if any */
		255	void (on_destroy)(pTHX_ struct coro coro);
271		256
272	/* statistics */	257	/* statistics */
273	int usecount; /* number of transfers to this coro */	258	int usecount; /* number of transfers to this coro */
274		259
275	/* coro process data */	260	/* coro process data */
276	int prio;	261	int prio;
277	SV throw; / exception to be thrown */	262	SV except; / exception to be thrown */
278		263
279	/* async_pool */	264	/* async_pool */
280	SV *saved_deffh;	265	SV *saved_deffh;
281		266
282	/* linked list */	267	/* linked list */
…		…
284	};	269	};
285		270
286	typedef struct coro *Coro__State;	271	typedef struct coro *Coro__State;
287	typedef struct coro *Coro__State_or_hashref;	272	typedef struct coro *Coro__State_or_hashref;
288		273
		274	/* the following variables are effectively part of the perl context */
		275	/* and get copied between struct coro and these variables */
		276	/* the mainr easonw e don't support windows process emulation */
289	static struct CoroSLF slf_frame; /* the current slf frame */	277	static struct CoroSLF slf_frame; /* the current slf frame */
290		278
291	/ Coro ******************************************************************/	279	/ Coro ******************************************************************/
292		280
293	#define PRIO_MAX 3	281	#define PRIO_MAX 3
…		…
395	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	383	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396		384
397	return 0;	385	return 0;
398	}	386	}
399		387
400	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	388	#define CORO_MAGIC_type_cv 26
401	#define CORO_MAGIC_type_state PERL_MAGIC_ext	389	#define CORO_MAGIC_type_state PERL_MAGIC_ext
402		390
403	static MGVTBL coro_cv_vtbl = {	391	static MGVTBL coro_cv_vtbl = {
404	0, 0, 0, 0,	392	0, 0, 0, 0,
405	coro_cv_free	393	coro_cv_free
406	};	394	};
407		395
		396	#define CORO_MAGIC_NN(sv, type) \
		397	(expect_true (SvMAGIC (sv)->mg_type == type) \
		398	? SvMAGIC (sv) \
		399	: mg_find (sv, type))
		400
408	#define CORO_MAGIC(sv, type) \	401	#define CORO_MAGIC(sv, type) \
409	SvMAGIC (sv) \	402	(expect_true (SvMAGIC (sv)) \
410	? SvMAGIC (sv)->mg_type == type \	403	? CORO_MAGIC_NN (sv, type) \
411	? SvMAGIC (sv) \
412	: mg_find (sv, type) \
413	: 0	404	: 0)
414		405
415	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	406	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	407	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
417		408
418	INLINE struct coro *	409	INLINE struct coro *
419	SvSTATE_ (pTHX_ SV *coro)	410	SvSTATE_ (pTHX_ SV *coro)
420	{	411	{
421	HV *stash;	412	HV *stash;
…		…
438	mg = CORO_MAGIC_state (coro);	429	mg = CORO_MAGIC_state (coro);
439	return (struct coro *)mg->mg_ptr;	430	return (struct coro *)mg->mg_ptr;
440	}	431	}
441		432
442	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	433	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		434
		435	/* faster than SvSTATE, but expects a coroutine hv */
		436	#define SvSTATE_hv(hv) ((struct coro )CORO_MAGIC_NN ((SV )hv, CORO_MAGIC_type_state)->mg_ptr)
		437	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443		438
444	/* the next two functions merely cache the padlists */	439	/* the next two functions merely cache the padlists */
445	static void	440	static void
446	get_padlist (pTHX_ CV *cv)	441	get_padlist (pTHX_ CV *cv)
447	{	442	{
…		…
515	}	510	}
516		511
517	PUTBACK;	512	PUTBACK;
518	}	513	}
519		514
520	slf_frame = c->slf_frame;	515	slf_frame = c->slf_frame;
		516	CORO_THROW = c->except;
521	}	517	}
522		518
523	static void	519	static void
524	save_perl (pTHX_ Coro__State c)	520	save_perl (pTHX_ Coro__State c)
525	{	521	{
		522	c->except = CORO_THROW;
526	c->slf_frame = slf_frame;	523	c->slf_frame = slf_frame;
527		524
528	{	525	{
529	dSP;	526	dSP;
530	I32 cxix = cxstack_ix;	527	I32 cxix = cxstack_ix;
…		…
811		808
812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	809	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813	}	810	}
814		811
815	static void	812	static void
816	prepare_nop (aTHX_ struct coro_transfer_args *ta)	813	prepare_nop (pTHX_ struct coro_transfer_args *ta)
817	{	814	{
818	/* kind of mega-hacky, but works */	815	/* kind of mega-hacky, but works */
819	ta->next = ta->prev = (struct coro *)ta;	816	ta->next = ta->prev = (struct coro *)ta;
820	}	817	}
821		818
822	static int	819	static int
823	slf_check_nop (aTHX)	820	slf_check_nop (pTHX_ struct CoroSLF *frame)
824	{	821	{
825	return 0;	822	return 0;
826	}	823	}
827		824
828	static void	825	static UNOP coro_setup_op;
		826
		827	static void NOINLINE /* noinline to keep it out of the transfer fast path */
829	coro_setup (pTHX_ struct coro *coro)	828	coro_setup (pTHX_ struct coro *coro)
830	{	829	{
831	/*	830	/*
832	* emulate part of the perl startup here.	831	* emulate part of the perl startup here.
833	*/	832	*/
…		…
860	{	859	{
861	dSP;	860	dSP;
862	UNOP myop;	861	UNOP myop;
863		862
864	Zero (&myop, 1, UNOP);	863	Zero (&myop, 1, UNOP);
865	myop.op_next = Nullop;	864	myop.op_next = Nullop;
866	myop.op_flags = OPf_WANT_VOID;	865	myop.op_flags = OPf_WANT_VOID;
867		866
868	PUSHMARK (SP);	867	PUSHMARK (SP);
869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	868	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870	PUTBACK;	869	PUTBACK;
…		…
876	/* this newly created coroutine might be run on an existing cctx which most	875	/* this newly created coroutine might be run on an existing cctx which most
877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.	876	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878	*/	877	*/
879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */	878	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 */	879	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		880
		881	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		882	coro_setup_op.op_next = PL_op;
		883	coro_setup_op.op_type = OP_CUSTOM;
		884	coro_setup_op.op_ppaddr = pp_slf;
		885	/* no flags required, as an init function won't be called */
		886
		887	PL_op = (OP *)&coro_setup_op;
		888
		889	/* copy throw, in case it was set before coro_setup */
		890	CORO_THROW = coro->except;
881	}	891	}
882		892
883	static void	893	static void
884	coro_destruct (pTHX_ struct coro *coro)	894	coro_destruct (pTHX_ struct coro *coro)
885	{	895	{
…		…
909		919
910	SvREFCNT_dec (PL_diehook);	920	SvREFCNT_dec (PL_diehook);
911	SvREFCNT_dec (PL_warnhook);	921	SvREFCNT_dec (PL_warnhook);
912		922
913	SvREFCNT_dec (coro->saved_deffh);	923	SvREFCNT_dec (coro->saved_deffh);
914	SvREFCNT_dec (coro->throw);	924	SvREFCNT_dec (CORO_THROW);
915		925
916	coro_destruct_stacks (aTHX);	926	coro_destruct_stacks (aTHX);
917	}	927	}
918		928
919	INLINE void	929	INLINE void
…		…
929	static int	939	static int
930	runops_trace (pTHX)	940	runops_trace (pTHX)
931	{	941	{
932	COP *oldcop = 0;	942	COP *oldcop = 0;
933	int oldcxix = -2;	943	int oldcxix = -2;
934	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */	944	struct coro coro = SvSTATE_current; / trace cctx is tied to specific coro */
935	coro_cctx *cctx = coro->cctx;	945	coro_cctx *cctx = coro->cctx;
936		946
937	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	947	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938	{	948	{
939	PERL_ASYNC_CHECK ();	949	PERL_ASYNC_CHECK ();
…		…
1048		1058
1049	TAINT_NOT;	1059	TAINT_NOT;
1050	return 0;	1060	return 0;
1051	}	1061	}
1052		1062
		1063	static struct coro_cctx *cctx_ssl_cctx;
		1064	static struct CoroSLF cctx_ssl_frame;
		1065
1053	static void	1066	static void
1054	prepare_set_stacklevel (struct coro_transfer_args ta, struct coro_cctx cctx)	1067	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1055	{	1068	{
1056	ta->prev = (struct coro *)cctx;	1069	ta->prev = (struct coro *)cctx_ssl_cctx;
1057	ta->next = 0;	1070	ta->next = 0;
1058	}	1071	}
1059		1072
1060	/* inject a fake call to Coro::State::_cctx_init into the execution */	1073	static int
1061	/* _cctx_init should be careful, as it could be called at almost any time */	1074	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1062	/* during execution of a perl program */	1075	{
1063	/* also initialises PL_top_env */	1076	*frame = cctx_ssl_frame;
		1077
		1078	return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
		1079	}
		1080
		1081	/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1064	static void NOINLINE	1082	static void NOINLINE
1065	cctx_prepare (pTHX_ coro_cctx *cctx)	1083	cctx_prepare (pTHX_ coro_cctx *cctx)
1066	{	1084	{
1067	dSP;
1068	UNOP myop;
1069
1070	PL_top_env = &PL_start_env;	1085	PL_top_env = &PL_start_env;
1071		1086
1072	if (cctx->flags & CC_TRACE)	1087	if (cctx->flags & CC_TRACE)
1073	PL_runops = runops_trace;	1088	PL_runops = runops_trace;
1074		1089
1075	Zero (&myop, 1, UNOP);	1090	/* we already must be executing an SLF op, there is no other valid way
1076	myop.op_next = PL_op;	1091	* that can lead to creation of a new cctx */
1077	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	1092	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1093	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1078		1094
1079	PUSHMARK (SP);	1095	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1080	EXTEND (SP, 2);	1096	cctx_ssl_cctx = cctx;
1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));	1097	cctx_ssl_frame = slf_frame;
1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1098
1083	PUTBACK;	1099	slf_frame.prepare = slf_prepare_set_stacklevel;
1084	PL_op = (OP *)&myop;	1100	slf_frame.check = slf_check_set_stacklevel;
1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086	SPAGAIN;
1087	}	1101	}
1088		1102
1089	/* the tail of transfer: execute stuff we can only do after a transfer */	1103	/* the tail of transfer: execute stuff we can only do after a transfer */
1090	INLINE void	1104	INLINE void
1091	transfer_tail (pTHX)	1105	transfer_tail (pTHX)
1092	{	1106	{
1093	struct coro next = (struct coro )transfer_next;
1094	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097	free_coro_mortal (aTHX);	1107	free_coro_mortal (aTHX);
1098	UNLOCK;
1099
1100	if (expect_false (next->throw))
1101	{
1102	SV *exception = sv_2mortal (next->throw);
1103
1104	next->throw = 0;
1105	sv_setsv (ERRSV, exception);
1106	croak (0);
1107	}
1108	}	1108	}
1109		1109
1110	/*	1110	/*
1111	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1112	*/	1112	*/
…		…
1127		1127
1128	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1129	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1130		1130
1131	/* 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 */
1133	transfer_tail (aTHX);	1132	transfer_tail (aTHX);
1134		1133
1135	/* somebody or something will hit me for both perl_run and PL_restartop */	1134	/* somebody or something will hit me for both perl_run and PL_restartop */
1136	PL_restartop = PL_op;	1135	PL_restartop = PL_op;
1137	perl_run (PL_curinterp);	1136	perl_run (PL_curinterp);
…		…
1293	/ coroutine switching ***************************************************/	1292	/ coroutine switching ***************************************************/
1294		1293
1295	static void	1294	static void
1296	transfer_check (pTHX_ struct coro prev, struct coro next)	1295	transfer_check (pTHX_ struct coro prev, struct coro next)
1297	{	1296	{
		1297	/* TODO: throwing up here is considered harmful */
		1298
1298	if (expect_true (prev != next))	1299	if (expect_true (prev != next))
1299	{	1300	{
1300	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))	1301	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
1301	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");	1302	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302		1303
…		…
1312	#endif	1313	#endif
1313	}	1314	}
1314	}	1315	}
1315		1316
1316	/* always use the TRANSFER macro */	1317	/* always use the TRANSFER macro */
1317	static void NOINLINE	1318	static void NOINLINE /* noinline so we have a fixed stackframe */
1318	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)	1319	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
1319	{	1320	{
1320	dSTACKLEVEL;	1321	dSTACKLEVEL;
1321		1322
1322	/* sometimes transfer is only called to set idle_sp */	1323	/* sometimes transfer is only called to set idle_sp */
1323	if (expect_false (!next))	1324	if (expect_false (!next))
1324	{	1325	{
1325	((coro_cctx *)prev)->idle_sp = stacklevel;	1326	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1326	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */	1327	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
1327	}	1328	}
1328	else if (expect_true (prev != next))	1329	else if (expect_true (prev != next))
1329	{	1330	{
1330	coro_cctx *prev__cctx;	1331	coro_cctx *prev__cctx;
…		…
1337	prev->flags \|= CF_RUNNING;	1338	prev->flags \|= CF_RUNNING;
1338	}	1339	}
1339		1340
1340	prev->flags &= ~CF_RUNNING;	1341	prev->flags &= ~CF_RUNNING;
1341	next->flags \|= CF_RUNNING;	1342	next->flags \|= CF_RUNNING;
1342
1343	LOCK;
1344		1343
1345	/* first get rid of the old state */	1344	/* first get rid of the old state */
1346	save_perl (aTHX_ prev);	1345	save_perl (aTHX_ prev);
1347		1346
1348	if (expect_false (next->flags & CF_NEW))	1347	if (expect_false (next->flags & CF_NEW))
…		…
1357		1356
1358	prev__cctx = prev->cctx;	1357	prev__cctx = prev->cctx;
1359		1358
1360	/* possibly untie and reuse the cctx */	1359	/* possibly untie and reuse the cctx */
1361	if (expect_true (	1360	if (expect_true (
1362	prev__cctx->idle_sp == stacklevel	1361	prev__cctx->idle_sp == STACKLEVEL
1363	&& !(prev__cctx->flags & CC_TRACE)	1362	&& !(prev__cctx->flags & CC_TRACE)
1364	&& !force_cctx	1363	&& !force_cctx
1365	))	1364	))
1366	{	1365	{
1367	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */	1366	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
…		…
1381	++next->usecount;	1380	++next->usecount;
1382		1381
1383	if (expect_true (!next->cctx))	1382	if (expect_true (!next->cctx))
1384	next->cctx = cctx_get (aTHX);	1383	next->cctx = cctx_get (aTHX);
1385		1384
1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387	transfer_next = next;
1388
1389	if (expect_false (prev__cctx != next->cctx))	1385	if (expect_false (prev__cctx != next->cctx))
1390	{	1386	{
1391	prev__cctx->top_env = PL_top_env;	1387	prev__cctx->top_env = PL_top_env;
1392	PL_top_env = next->cctx->top_env;	1388	PL_top_env = next->cctx->top_env;
1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1389	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
…		…
1406	coro_state_destroy (pTHX_ struct coro *coro)	1402	coro_state_destroy (pTHX_ struct coro *coro)
1407	{	1403	{
1408	if (coro->flags & CF_DESTROYED)	1404	if (coro->flags & CF_DESTROYED)
1409	return 0;	1405	return 0;
1410		1406
		1407	if (coro->on_destroy)
		1408	coro->on_destroy (aTHX_ coro);
		1409
1411	coro->flags \|= CF_DESTROYED;	1410	coro->flags \|= CF_DESTROYED;
1412		1411
1413	if (coro->flags & CF_READY)	1412	if (coro->flags & CF_READY)
1414	{	1413	{
1415	/* reduce nready, as destroying a ready coro effectively unreadies it */	1414	/* reduce nready, as destroying a ready coro effectively unreadies it */
1416	/* alternative: look through all ready queues and remove the coro */	1415	/* alternative: look through all ready queues and remove the coro */
1417	LOCK;
1418	--coro_nready;	1416	--coro_nready;
1419	UNLOCK;
1420	}	1417	}
1421	else	1418	else
1422	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */	1419	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
1423		1420
1424	if (coro->mainstack && coro->mainstack != main_mainstack)	1421	if (coro->mainstack && coro->mainstack != main_mainstack)
…		…
1502	TRANSFER (ta, 1);	1499	TRANSFER (ta, 1);
1503	}	1500	}
1504		1501
1505	/ Coro ******************************************************************/	1502	/ Coro ******************************************************************/
1506		1503
1507	static void	1504	INLINE void
1508	coro_enq (pTHX_ SV *coro_sv)	1505	coro_enq (pTHX_ struct coro *coro)
1509	{	1506	{
1510	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1507	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1511	}	1508	}
1512		1509
1513	static SV *	1510	INLINE SV *
1514	coro_deq (pTHX)	1511	coro_deq (pTHX)
1515	{	1512	{
1516	int prio;	1513	int prio;
1517		1514
1518	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1515	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1537	if (coro->flags & CF_READY)	1534	if (coro->flags & CF_READY)
1538	return 0;	1535	return 0;
1539		1536
1540	coro->flags \|= CF_READY;	1537	coro->flags \|= CF_READY;
1541		1538
1542	LOCK;
1543
1544	sv_hook = coro_nready ? 0 : coro_readyhook;	1539	sv_hook = coro_nready ? 0 : coro_readyhook;
1545	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1540	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546		1541
1547	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1542	coro_enq (aTHX_ coro);
1548	++coro_nready;	1543	++coro_nready;
1549		1544
1550	UNLOCK;
1551
1552	if (sv_hook)	1545	if (sv_hook)
1553	{	1546	{
1554	dSP;	1547	dSP;
1555		1548
1556	ENTER;	1549	ENTER;
1557	SAVETMPS;	1550	SAVETMPS;
1558		1551
1559	PUSHMARK (SP);	1552	PUSHMARK (SP);
1560	PUTBACK;	1553	PUTBACK;
1561	call_sv (sv_hook, G_DISCARD);	1554	call_sv (sv_hook, G_VOID \| G_DISCARD);
1562	SPAGAIN;
1563		1555
1564	FREETMPS;	1556	FREETMPS;
1565	LEAVE;	1557	LEAVE;
1566	}	1558	}
1567		1559
…		…
1582	{	1574	{
1583	SV prev_sv, next_sv;	1575	SV prev_sv, next_sv;
1584		1576
1585	for (;;)	1577	for (;;)
1586	{	1578	{
1587	LOCK;
1588	next_sv = coro_deq (aTHX);	1579	next_sv = coro_deq (aTHX);
1589		1580
1590	/* nothing to schedule: call the idle handler */	1581	/* nothing to schedule: call the idle handler */
1591	if (expect_false (!next_sv))	1582	if (expect_false (!next_sv))
1592	{	1583	{
1593	dSP;	1584	dSP;
1594	UNLOCK;
1595		1585
1596	ENTER;	1586	ENTER;
1597	SAVETMPS;	1587	SAVETMPS;
1598		1588
1599	PUSHMARK (SP);	1589	PUSHMARK (SP);
1600	PUTBACK;	1590	PUTBACK;
1601	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1591	call_sv (get_sv ("Coro::idle", FALSE), G_VOID \| G_DISCARD);
1602	SPAGAIN;
1603		1592
1604	FREETMPS;	1593	FREETMPS;
1605	LEAVE;	1594	LEAVE;
1606	continue;	1595	continue;
1607	}	1596	}
1608		1597
1609	ta->next = SvSTATE (next_sv);	1598	ta->next = SvSTATE_hv (next_sv);
1610		1599
1611	/* cannot transfer to destroyed coros, skip and look for next */	1600	/* cannot transfer to destroyed coros, skip and look for next */
1612	if (expect_false (ta->next->flags & CF_DESTROYED))	1601	if (expect_false (ta->next->flags & CF_DESTROYED))
1613	{	1602	{
1614	UNLOCK;
1615	SvREFCNT_dec (next_sv);	1603	SvREFCNT_dec (next_sv);
1616	/* coro_nready has already been taken care of by destroy */	1604	/* coro_nready has already been taken care of by destroy */
1617	continue;	1605	continue;
1618	}	1606	}
1619		1607
1620	--coro_nready;	1608	--coro_nready;
1621	UNLOCK;
1622	break;	1609	break;
1623	}	1610	}
1624		1611
1625	/* free this only after the transfer */	1612	/* free this only after the transfer */
1626	prev_sv = SvRV (coro_current);	1613	prev_sv = SvRV (coro_current);
1627	ta->prev = SvSTATE (prev_sv);	1614	ta->prev = SvSTATE_hv (prev_sv);
1628	TRANSFER_CHECK (*ta);	1615	TRANSFER_CHECK (*ta);
1629	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1616	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630	ta->next->flags &= ~CF_READY;	1617	ta->next->flags &= ~CF_READY;
1631	SvRV_set (coro_current, next_sv);	1618	SvRV_set (coro_current, next_sv);
1632		1619
1633	LOCK;
1634	free_coro_mortal (aTHX);	1620	free_coro_mortal (aTHX);
1635	coro_mortal = prev_sv;	1621	coro_mortal = prev_sv;
1636	UNLOCK;
1637	}	1622	}
1638		1623
1639	INLINE void	1624	INLINE void
1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)	1625	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641	{	1626	{
…		…
1720	else	1705	else
1721	coro->slot->runops = RUNOPS_DEFAULT;	1706	coro->slot->runops = RUNOPS_DEFAULT;
1722	}	1707	}
1723	}	1708	}
1724		1709
1725	#if 0	1710	/*****************************************************************************/
		1711	/* schedule-like-function opcode (SLF) */
		1712
		1713	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1714	static const CV *slf_cv;
		1715	static SV **slf_argv;
		1716	static int slf_argc, slf_arga; /* count, allocated */
		1717	static I32 slf_ax; /* top of stack, for restore */
		1718
		1719	/* this restores the stack in the case we patched the entersub, to */
		1720	/* recreate the stack frame as perl will on following calls */
		1721	/* since entersub cleared the stack */
		1722	static OP *
		1723	pp_restore (pTHX)
		1724	{
		1725	int i;
		1726	SV **SP = PL_stack_base + slf_ax;
		1727
		1728	PUSHMARK (SP);
		1729
		1730	EXTEND (SP, slf_argc + 1);
		1731
		1732	for (i = 0; i < slf_argc; ++i)
		1733	PUSHs (sv_2mortal (slf_argv [i]));
		1734
		1735	PUSHs ((SV *)CvGV (slf_cv));
		1736
		1737	RETURNOP (slf_restore.op_first);
		1738	}
		1739
1726	static int	1740	static void
1727	coro_gensub_free (pTHX_ SV sv, MAGIC mg)	1741	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1728	{	1742	{
1729	AV *padlist;	1743	SV arg = (SV )slf_frame.data;
1730	AV av = (AV )mg->mg_obj;
1731		1744
1732	abort ();	1745	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1733
1734	return 0;
1735	}	1746	}
1736		1747
1737	static MGVTBL coro_gensub_vtbl = {	1748	static void
1738	0, 0, 0, 0,	1749	slf_init_transfer (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
1739	coro_gensub_free	1750	{
1740	};	1751	if (items != 2)
1741	#endif	1752	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1753
		1754	frame->prepare = slf_prepare_transfer;
		1755	frame->check = slf_check_nop;
		1756	frame->data = (void )arg; / let's hope it will stay valid */
		1757	}
		1758
		1759	static void
		1760	slf_init_schedule (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1761	{
		1762	frame->prepare = prepare_schedule;
		1763	frame->check = slf_check_nop;
		1764	}
		1765
		1766	static void
		1767	slf_init_cede (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1768	{
		1769	frame->prepare = prepare_cede;
		1770	frame->check = slf_check_nop;
		1771	}
		1772
		1773	static void
		1774	slf_init_cede_notself (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1775	{
		1776	frame->prepare = prepare_cede_notself;
		1777	frame->check = slf_check_nop;
		1778	}
		1779
		1780	/*
		1781	* these not obviously related functions are all rolled into one
		1782	* function to increase chances that they all will call transfer with the same
		1783	* stack offset
		1784	* SLF stands for "schedule-like-function".
		1785	*/
		1786	static OP *
		1787	pp_slf (pTHX)
		1788	{
		1789	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1790
		1791	/* set up the slf frame, unless it has already been set-up */
		1792	/* the latter happens when a new coro has been started */
		1793	/* or when a new cctx was attached to an existing coroutine */
		1794	if (expect_true (!slf_frame.prepare))
		1795	{
		1796	/* first iteration */
		1797	dSP;
		1798	SV **arg = PL_stack_base + TOPMARK + 1;
		1799	int items = SP - arg; /* args without function object */
		1800	SV gv = sp;
		1801
		1802	/* do a quick consistency check on the "function" object, and if it isn't */
		1803	/* for us, divert to the real entersub */
		1804	if (SvTYPE (gv) != SVt_PVGV
		1805	\|\| !GvCV (gv)
		1806	\|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1807	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1808
		1809	if (!(PL_op->op_flags & OPf_STACKED))
		1810	{
		1811	/* ampersand-form of call, use @_ instead of stack */
		1812	AV *av = GvAV (PL_defgv);
		1813	arg = AvARRAY (av);
		1814	items = AvFILLp (av) + 1;
		1815	}
		1816
		1817	/* now call the init function, which needs to set up slf_frame */
		1818	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1819	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1820
		1821	/* pop args */
		1822	SP = PL_stack_base + POPMARK;
		1823
		1824	PUTBACK;
		1825	}
		1826
		1827	/* now that we have a slf_frame, interpret it! */
		1828	/* we use a callback system not to make the code needlessly */
		1829	/* complicated, but so we can run multiple perl coros from one cctx */
		1830
		1831	do
		1832	{
		1833	struct coro_transfer_args ta;
		1834
		1835	slf_frame.prepare (aTHX_ &ta);
		1836	TRANSFER (ta, 0);
		1837
		1838	checkmark = PL_stack_sp - PL_stack_base;
		1839	}
		1840	while (slf_frame.check (aTHX_ &slf_frame));
		1841
		1842	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1843
		1844	/* exception handling */
		1845	if (expect_false (CORO_THROW))
		1846	{
		1847	SV *exception = sv_2mortal (CORO_THROW);
		1848
		1849	CORO_THROW = 0;
		1850	sv_setsv (ERRSV, exception);
		1851	croak (0);
		1852	}
		1853
		1854	/* return value handling - mostly like entersub */
		1855	/* make sure we put something on the stack in scalar context */
		1856	if (GIMME_V == G_SCALAR)
		1857	{
		1858	dSP;
		1859	SV **bot = PL_stack_base + checkmark;
		1860
		1861	if (sp == bot) /* too few, push undef */
		1862	bot [1] = &PL_sv_undef;
		1863	else if (sp != bot + 1) /* too many, take last one */
		1864	bot [1] = *sp;
		1865
		1866	SP = bot + 1;
		1867
		1868	PUTBACK;
		1869	}
		1870
		1871	return NORMAL;
		1872	}
		1873
		1874	static void
		1875	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1876	{
		1877	int i;
		1878	SV **arg = PL_stack_base + ax;
		1879	int items = PL_stack_sp - arg + 1;
		1880
		1881	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1882
		1883	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1884	&& PL_op->op_ppaddr != pp_slf)
		1885	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1886
		1887	CvFLAGS (cv) \|= CVf_SLF;
		1888	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1889	slf_cv = cv;
		1890
		1891	/* we patch the op, and then re-run the whole call */
		1892	/* we have to put the same argument on the stack for this to work */
		1893	/* and this will be done by pp_restore */
		1894	slf_restore.op_next = (OP *)&slf_restore;
		1895	slf_restore.op_type = OP_CUSTOM;
		1896	slf_restore.op_ppaddr = pp_restore;
		1897	slf_restore.op_first = PL_op;
		1898
		1899	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1900
		1901	if (PL_op->op_flags & OPf_STACKED)
		1902	{
		1903	if (items > slf_arga)
		1904	{
		1905	slf_arga = items;
		1906	free (slf_argv);
		1907	slf_argv = malloc (slf_arga * sizeof (SV *));
		1908	}
		1909
		1910	slf_argc = items;
		1911
		1912	for (i = 0; i < items; ++i)
		1913	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1914	}
		1915	else
		1916	slf_argc = 0;
		1917
		1918	PL_op->op_ppaddr = pp_slf;
		1919	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1920
		1921	PL_op = (OP *)&slf_restore;
		1922	}
1742		1923
1743	/*****************************************************************************/	1924	/*****************************************************************************/
1744	/* PerlIO::cede */	1925	/* PerlIO::cede */
1745		1926
1746	typedef struct	1927	typedef struct
…		…
1814	PerlIOBuf_get_cnt,	1995	PerlIOBuf_get_cnt,
1815	PerlIOBuf_set_ptrcnt,	1996	PerlIOBuf_set_ptrcnt,
1816	};	1997	};
1817		1998
1818	/*****************************************************************************/	1999	/*****************************************************************************/
		2000	/* Coro::Semaphore */
1819		2001
1820	static const CV slf_cv; / for quick consistency check */
1821
1822	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1823	static SV *slf_arg0;
1824	static SV *slf_arg1;
1825	static SV *slf_arg2;
1826
1827	/* this restores the stack in the case we patched the entersub, to */
1828	/* recreate the stack frame as perl will on following calls */
1829	/* since entersub cleared the stack */
1830	static OP *
1831	pp_restore (pTHX)
1832	{
1833	dSP;
1834
1835	PUSHMARK (SP);
1836
1837	EXTEND (SP, 3);
1838	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1839	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1840	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1841	PUSHs ((SV *)CvGV (slf_cv));
1842
1843	RETURNOP (slf_restore.op_first);
1844	}
1845
1846	static void	2002	static void
1847	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)	2003	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1848	{	2004	{
1849	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);	2005	SV *count_sv = AvARRAY (av)[0];
1850	}	2006	IV count = SvIVX (count_sv);
1851		2007
1852	static void	2008	count += adjust;
1853	slf_init_set_stacklevel (pTHX_ struct CoroSLF frame, SV *arg, int items)	2009	SvIVX (count_sv) = count;
1854	{
1855	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1856		2010
1857	frame->prepare = slf_prepare_set_stacklevel;	2011	/* now wake up as many waiters as are expected to lock */
1858	frame->check = slf_check_nop;	2012	while (count > 0 && AvFILLp (av) > 0)
1859	frame->data = (void *)SvIV (arg [0]);
1860	}
1861
1862	static void
1863	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1864	{
1865	SV arg = (SV )slf_frame.data;
1866
1867	prepare_transfer (ta, arg [0], arg [1]);
1868	}
1869
1870	static void
1871	slf_init_transfer (pTHX_ struct CoroSLF frame, SV *arg, int items)
1872	{
1873	if (items != 2)
1874	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1875
1876	frame->prepare = slf_prepare_transfer;
1877	frame->check = slf_check_nop;
1878	frame->data = (void )arg; / let's hope it will stay valid */
1879	}
1880
1881	static void
1882	slf_init_schedule (pTHX_ struct CoroSLF frame, SV *arg, int items)
1883	{
1884	frame->prepare = prepare_schedule;
1885	frame->check = slf_check_nop;
1886	}
1887
1888	static void
1889	slf_init_cede (pTHX_ struct CoroSLF frame, SV *arg, int items)
1890	{
1891	frame->prepare = prepare_cede;
1892	frame->check = slf_check_nop;
1893	}
1894
1895	static void
1896	slf_init_cede_notself (pTHX_ struct CoroSLF frame, SV *arg, int items)
1897	{
1898	frame->prepare = prepare_cede_notself;
1899	frame->check = slf_check_nop;
1900	}
1901
1902	/* we hijack an hopefully unused CV flag for our purposes */
1903	#define CVf_SLF 0x4000
1904
1905	/*
1906	* these not obviously related functions are all rolled into one
1907	* function to increase chances that they all will call transfer with the same
1908	* stack offset
1909	* SLF stands for "schedule-like-function".
1910	*/
1911	static OP *
1912	pp_slf (pTHX)
1913	{
1914	I32 checkmark; /* mark SP to see how many elements check has pushed */
1915
1916	/* set up the slf frame, unless it has already been set-up */
1917	/* the latter happens when a new coro has been started */
1918	/* or when a new cctx was attached to an existing coroutine */
1919	if (expect_true (!slf_frame.prepare))
1920	{
1921	/* first iteration */
1922	dSP;
1923	SV **arg = PL_stack_base + TOPMARK + 1;
1924	int items = SP - arg; /* args without function object */
1925	SV gv = sp;
1926
1927	/* do a quick consistency check on the "function" object, and if it isn't */
1928	/* for us, divert to the real entersub */
1929	if (SvTYPE (gv) != SVt_PVGV \|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1930	return PL_ppaddr[OP_ENTERSUB](aTHX);
1931
1932	/* pop args */
1933	SP = PL_stack_base + POPMARK;
1934
1935	if (!(PL_op->op_flags & OPf_STACKED))
1936	{
1937	/* ampersand-form of call, use @_ instead of stack */
1938	AV *av = GvAV (PL_defgv);
1939	arg = AvARRAY (av);
1940	items = AvFILLp (av) + 1;
1941	}
1942
1943	PUTBACK;
1944
1945	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1946	}
1947
1948	/* now interpret the slf_frame */
1949	/* we use a callback system not to make the code needlessly */
1950	/* complicated, but so we can run multiple perl coros from one cctx */
1951
1952	do
1953	{
1954	struct coro_transfer_args ta;
1955
1956	slf_frame.prepare (aTHX_ &ta);
1957	TRANSFER (ta, 0);
1958
1959	checkmark = PL_stack_sp - PL_stack_base;
1960	}
1961	while (slf_frame.check (aTHX_ &slf_frame));
1962
1963	{
1964	dSP;
1965	SV **bot = PL_stack_base + checkmark;
1966	int gimme = GIMME_V;
1967
1968	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1969
1970	/* make sure we put something on the stack in scalar context */
1971	if (gimme == G_SCALAR)
1972	{	2013	{
1973	if (sp == bot)	2014	SV *cb;
1974	XPUSHs (&PL_sv_undef);
1975		2015
1976	SP = bot + 1;	2016	/* swap first two elements so we can shift a waiter */
		2017	AvARRAY (av)[0] = AvARRAY (av)[1];
		2018	AvARRAY (av)[1] = count_sv;
		2019	cb = av_shift (av);
		2020
		2021	if (SvOBJECT (cb))
		2022	api_ready (aTHX_ cb);
		2023	else
		2024	croak ("callbacks not yet supported");
		2025
		2026	SvREFCNT_dec (cb);
		2027
		2028	--count;
1977	}	2029	}
1978
1979	PUTBACK;
1980	}
1981
1982	return NORMAL;
1983	}	2030	}
1984		2031
1985	static void	2032	static void
1986	api_execute_slf (pTHX_ CV cv, coro_slf_cb init_cb, SV *arg, int items)	2033	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
1987	{	2034	{
1988	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));	2035	/* call $sem->adjust (0) to possibly wake up some other waiters */
1989		2036	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
1990	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1991	&& PL_op->op_ppaddr != pp_slf)
1992	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1993
1994	if (items > 3)
1995	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1996
1997	CvFLAGS (cv) \|= CVf_SLF;
1998	CvXSUBANY (cv).any_ptr = (void *)init_cb;
1999	slf_cv = cv;
2000
2001	/* we patch the op, and then re-run the whole call */
2002	/* we have to put the same argument on the stack for this to work */
2003	/* and this will be done by pp_restore */
2004	slf_restore.op_next = (OP *)&slf_restore;
2005	slf_restore.op_type = OP_NULL;
2006	slf_restore.op_ppaddr = pp_restore;
2007	slf_restore.op_first = PL_op;
2008
2009	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2010	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2011	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
2012
2013	PL_op->op_ppaddr = pp_slf;
2014
2015	PL_op = (OP *)&slf_restore;
2016	}	2037	}
2017
2018	/*****************************************************************************/
2019		2038
2020	static int	2039	static int
2021	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)	2040	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2022	{	2041	{
2023	AV av = (AV )frame->data;	2042	AV av = (AV )frame->data;
2024	SV *count_sv = AvARRAY (av)[0];	2043	SV *count_sv = AvARRAY (av)[0];
2025		2044
		2045	/* if we are about to throw, don't actually acquire the lock, just throw */
		2046	if (CORO_THROW)
		2047	return 0;
2026	if (SvIVX (count_sv) > 0)	2048	else if (SvIVX (count_sv) > 0)
2027	{	2049	{
		2050	SvSTATE_current->on_destroy = 0;
		2051
		2052	if (acquire)
2028	SvIVX (count_sv) = SvIVX (count_sv) - 1;	2053	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2054	else
		2055	coro_semaphore_adjust (aTHX_ av, 0);
		2056
2029	return 0;	2057	return 0;
2030	}	2058	}
2031	else	2059	else
2032	{	2060	{
2033	int i;	2061	int i;
…		…
2042	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2070	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2043	return 1;	2071	return 1;
2044	}	2072	}
2045	}	2073	}
2046		2074
2047	static void	2075	static int
		2076	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2077	{
		2078	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2079	}
		2080
		2081	static int
		2082	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2083	{
		2084	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2085	}
		2086
		2087	static void
2048	slf_init_semaphore_down (pTHX_ struct CoroSLF frame, SV *arg, int items)	2088	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
2049	{	2089	{
2050	AV av = (AV )SvRV (arg [0]);	2090	AV av = (AV )SvRV (arg [0]);
2051		2091
2052	if (SvIVX (AvARRAY (av)[0]) > 0)	2092	if (SvIVX (AvARRAY (av)[0]) > 0)
2053	{	2093	{
…		…
2058	{	2098	{
2059	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2099	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060		2100
2061	frame->data = (void )sv_2mortal (SvREFCNT_inc ((SV )av));	2101	frame->data = (void )sv_2mortal (SvREFCNT_inc ((SV )av));
2062	frame->prepare = prepare_schedule;	2102	frame->prepare = prepare_schedule;
2063	}
2064		2103
		2104	/* to avoid race conditions when a woken-up coro gets terminated */
		2105	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2106	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2107	}
		2108	}
		2109
		2110	static void
		2111	slf_init_semaphore_down (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2112	{
		2113	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2065	frame->check = slf_check_semaphore_down;	2114	frame->check = slf_check_semaphore_down;
2066
2067	}	2115	}
		2116
		2117	static void
		2118	slf_init_semaphore_wait (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2119	{
		2120	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2121	frame->check = slf_check_semaphore_wait;
		2122	}
		2123
		2124	/*****************************************************************************/
		2125	/* gensub: simple closure generation utility */
		2126
		2127	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2128
		2129	/* create a closure from XS, returns a code reference */
		2130	/* the arg can be accessed via GENSUB_ARG from the callback */
		2131	/* the callback must use dXSARGS/XSRETURN */
		2132	static SV *
		2133	gensub (pTHX_ void (xsub)(pTHX_ CV ), void *arg)
		2134	{
		2135	CV cv = (CV )newSV (0);
		2136
		2137	sv_upgrade ((SV *)cv, SVt_PVCV);
		2138
		2139	CvANON_on (cv);
		2140	CvISXSUB_on (cv);
		2141	CvXSUB (cv) = xsub;
		2142	GENSUB_ARG = arg;
		2143
		2144	return newRV_noinc ((SV *)cv);
		2145	}
		2146
		2147	/*****************************************************************************/
		2148	/* Coro::AIO */
		2149
		2150	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2151
		2152	/* helper storage struct */
		2153	struct io_state
		2154	{
		2155	int errorno;
		2156	I32 laststype; /* U16 in 5.10.0 */
		2157	int laststatval;
		2158	Stat_t statcache;
		2159	};
		2160
		2161	static void
		2162	coro_aio_callback (pTHX_ CV *cv)
		2163	{
		2164	dXSARGS;
		2165	AV state = (AV )GENSUB_ARG;
		2166	SV *coro = av_pop (state);
		2167	SV *data_sv = newSV (sizeof (struct io_state));
		2168
		2169	av_extend (state, items);
		2170
		2171	sv_upgrade (data_sv, SVt_PV);
		2172	SvCUR_set (data_sv, sizeof (struct io_state));
		2173	SvPOK_only (data_sv);
		2174
		2175	{
		2176	struct io_state data = (struct io_state )SvPVX (data_sv);
		2177
		2178	data->errorno = errno;
		2179	data->laststype = PL_laststype;
		2180	data->laststatval = PL_laststatval;
		2181	data->statcache = PL_statcache;
		2182	}
		2183
		2184	/* now build the result vector out of all the parameters and the data_sv */
		2185	{
		2186	int i;
		2187
		2188	for (i = 0; i < items; ++i)
		2189	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2190	}
		2191
		2192	av_push (state, data_sv);
		2193
		2194	api_ready (aTHX_ coro);
		2195	SvREFCNT_dec (coro);
		2196	SvREFCNT_dec ((AV *)state);
		2197	}
		2198
		2199	static int
		2200	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2201	{
		2202	AV state = (AV )frame->data;
		2203
		2204	/* if we are about to throw, return early */
		2205	/* this does not cancel the aio request, but at least */
		2206	/* it quickly returns */
		2207	if (CORO_THROW)
		2208	return 0;
		2209
		2210	/* one element that is an RV? repeat! */
		2211	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2212	return 1;
		2213
		2214	/* restore status */
		2215	{
		2216	SV *data_sv = av_pop (state);
		2217	struct io_state data = (struct io_state )SvPVX (data_sv);
		2218
		2219	errno = data->errorno;
		2220	PL_laststype = data->laststype;
		2221	PL_laststatval = data->laststatval;
		2222	PL_statcache = data->statcache;
		2223
		2224	SvREFCNT_dec (data_sv);
		2225	}
		2226
		2227	/* push result values */
		2228	{
		2229	dSP;
		2230	int i;
		2231
		2232	EXTEND (SP, AvFILLp (state) + 1);
		2233	for (i = 0; i <= AvFILLp (state); ++i)
		2234	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2235
		2236	PUTBACK;
		2237	}
		2238
		2239	return 0;
		2240	}
		2241
		2242	static void
		2243	slf_init_aio_req (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2244	{
		2245	AV state = (AV )sv_2mortal ((SV *)newAV ());
		2246	SV *coro_hv = SvRV (coro_current);
		2247	struct coro *coro = SvSTATE_hv (coro_hv);
		2248
		2249	/* put our coroutine id on the state arg */
		2250	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2251
		2252	/* first see whether we have a non-zero priority and set it as AIO prio */
		2253	if (coro->prio)
		2254	{
		2255	dSP;
		2256
		2257	static SV *prio_cv;
		2258	static SV *prio_sv;
		2259
		2260	if (expect_false (!prio_cv))
		2261	{
		2262	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2263	prio_sv = newSViv (0);
		2264	}
		2265
		2266	PUSHMARK (SP);
		2267	sv_setiv (prio_sv, coro->prio);
		2268	XPUSHs (prio_sv);
		2269
		2270	PUTBACK;
		2271	call_sv (prio_cv, G_VOID \| G_DISCARD);
		2272	}
		2273
		2274	/* now call the original request */
		2275	{
		2276	dSP;
		2277	CV req = (CV )CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2278	int i;
		2279
		2280	PUSHMARK (SP);
		2281
		2282	/* first push all args to the stack */
		2283	EXTEND (SP, items + 1);
		2284
		2285	for (i = 0; i < items; ++i)
		2286	PUSHs (arg [i]);
		2287
		2288	/* now push the callback closure */
		2289	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void )SvREFCNT_inc_NN ((SV )state))));
		2290
		2291	/* now call the AIO function - we assume our request is uncancelable */
		2292	PUTBACK;
		2293	call_sv ((SV *)req, G_VOID \| G_DISCARD);
		2294	}
		2295
		2296	/* now that the requets is going, we loop toll we have a result */
		2297	frame->data = (void *)state;
		2298	frame->prepare = prepare_schedule;
		2299	frame->check = slf_check_aio_req;
		2300	}
		2301
		2302	static void
		2303	coro_aio_req_xs (pTHX_ CV *cv)
		2304	{
		2305	dXSARGS;
		2306
		2307	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2308
		2309	XSRETURN_EMPTY;
		2310	}
		2311
		2312	/*****************************************************************************/
2068		2313
2069	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2314	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2070		2315
2071	PROTOTYPES: DISABLE	2316	PROTOTYPES: DISABLE
2072		2317
2073	BOOT:	2318	BOOT:
2074	{	2319	{
2075	#ifdef USE_ITHREADS	2320	#ifdef USE_ITHREADS
2076	MUTEX_INIT (&coro_lock);
2077	# if CORO_PTHREAD	2321	# if CORO_PTHREAD
2078	coro_thx = PERL_GET_CONTEXT;	2322	coro_thx = PERL_GET_CONTEXT;
2079	# endif	2323	# endif
2080	#endif	2324	#endif
2081	BOOT_PAGESIZE;	2325	BOOT_PAGESIZE;
…		…
2101	main_mainstack = PL_mainstack;	2345	main_mainstack = PL_mainstack;
2102	main_top_env = PL_top_env;	2346	main_top_env = PL_top_env;
2103		2347
2104	while (main_top_env->je_prev)	2348	while (main_top_env->je_prev)
2105	main_top_env = main_top_env->je_prev;	2349	main_top_env = main_top_env->je_prev;
		2350
		2351	{
		2352	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2353
		2354	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2355	hv_store_ent (PL_custom_op_names, slf,
		2356	newSVpv ("coro_slf", 0), 0);
		2357
		2358	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2359	hv_store_ent (PL_custom_op_descs, slf,
		2360	newSVpv ("coro schedule like function", 0), 0);
		2361	}
2106		2362
2107	coroapi.ver = CORO_API_VERSION;	2363	coroapi.ver = CORO_API_VERSION;
2108	coroapi.rev = CORO_API_REVISION;	2364	coroapi.rev = CORO_API_REVISION;
2109		2365
2110	coroapi.transfer = api_transfer;	2366	coroapi.transfer = api_transfer;
…		…
2156	}	2412	}
2157	OUTPUT:	2413	OUTPUT:
2158	RETVAL	2414	RETVAL
2159		2415
2160	void	2416	void
2161	_set_stacklevel (...)	2417	transfer (...)
		2418	PROTOTYPE: $$
2162	CODE:	2419	CODE:
2163	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);	2420	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2164
2165	void
2166	transfer (...)
2167	CODE:
2168	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
2169		2421
2170	bool	2422	bool
2171	_destroy (SV *coro_sv)	2423	_destroy (SV *coro_sv)
2172	CODE:	2424	CODE:
2173	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2425	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2291		2543
2292	void	2544	void
2293	throw (Coro::State self, SV *throw = &PL_sv_undef)	2545	throw (Coro::State self, SV *throw = &PL_sv_undef)
2294	PROTOTYPE: $;$	2546	PROTOTYPE: $;$
2295	CODE:	2547	CODE:
		2548	{
		2549	struct coro *current = SvSTATE_current;
		2550	SV **throwp = self == current ? &CORO_THROW : &self->except;
2296	SvREFCNT_dec (self->throw);	2551	SvREFCNT_dec (*throwp);
2297	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2552	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2553	}
2298		2554
2299	void	2555	void
2300	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2556	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
2301	PROTOTYPE: $;$	2557	PROTOTYPE: $;$
2302	C_ARGS: aTHX_ coro, flags	2558	C_ARGS: aTHX_ coro, flags
…		…
2333		2589
2334	void	2590	void
2335	force_cctx ()	2591	force_cctx ()
2336	PROTOTYPE:	2592	PROTOTYPE:
2337	CODE:	2593	CODE:
2338	struct coro *coro = SvSTATE (coro_current);
2339	coro->cctx->idle_sp = 0;	2594	SvSTATE_current->cctx->idle_sp = 0;
2340		2595
2341	void	2596	void
2342	swap_defsv (Coro::State self)	2597	swap_defsv (Coro::State self)
2343	PROTOTYPE: $	2598	PROTOTYPE: $
2344	ALIAS:	2599	ALIAS:
…		…
2352	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;	2607	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
2353		2608
2354	SV tmp = src; src = dst; *dst = tmp;	2609	SV tmp = src; src = dst; *dst = tmp;
2355	}	2610	}
2356		2611
		2612
2357	MODULE = Coro::State PACKAGE = Coro	2613	MODULE = Coro::State PACKAGE = Coro
2358		2614
2359	BOOT:	2615	BOOT:
2360	{	2616	{
2361	int i;	2617	int i;
…		…
2388	coroapi.ready = api_ready;	2644	coroapi.ready = api_ready;
2389	coroapi.is_ready = api_is_ready;	2645	coroapi.is_ready = api_is_ready;
2390	coroapi.nready = coro_nready;	2646	coroapi.nready = coro_nready;
2391	coroapi.current = coro_current;	2647	coroapi.current = coro_current;
2392		2648
2393	GCoroAPI = &coroapi;	2649	/GCoroAPI = &coroapi;/
2394	sv_setiv (sv, (IV)&coroapi);	2650	sv_setiv (sv, (IV)&coroapi);
2395	SvREADONLY_on (sv);	2651	SvREADONLY_on (sv);
2396	}	2652	}
2397	}	2653	}
2398		2654
2399	void	2655	void
2400	schedule (...)	2656	schedule (...)
2401	CODE:	2657	CODE:
2402	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), items);	2658	CORO_EXECUTE_SLF_XS (slf_init_schedule);
2403		2659
2404	void	2660	void
2405	cede (...)	2661	cede (...)
2406	CODE:	2662	CODE:
2407	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), items);	2663	CORO_EXECUTE_SLF_XS (slf_init_cede);
2408		2664
2409	void	2665	void
2410	cede_notself (...)	2666	cede_notself (...)
2411	CODE:	2667	CODE:
2412	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), items);	2668	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2413		2669
2414	void	2670	void
2415	_set_current (SV *current)	2671	_set_current (SV *current)
2416	PROTOTYPE: $	2672	PROTOTYPE: $
2417	CODE:	2673	CODE:
…		…
2420		2676
2421	void	2677	void
2422	_set_readyhook (SV *hook)	2678	_set_readyhook (SV *hook)
2423	PROTOTYPE: $	2679	PROTOTYPE: $
2424	CODE:	2680	CODE:
2425	LOCK;
2426	SvREFCNT_dec (coro_readyhook);	2681	SvREFCNT_dec (coro_readyhook);
2427	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2682	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2428	UNLOCK;
2429		2683
2430	int	2684	int
2431	prio (Coro::State coro, int newprio = 0)	2685	prio (Coro::State coro, int newprio = 0)
2432	PROTOTYPE: $;$	2686	PROTOTYPE: $;$
2433	ALIAS:	2687	ALIAS:
…		…
2469	# for async_pool speedup	2723	# for async_pool speedup
2470	void	2724	void
2471	_pool_1 (SV *cb)	2725	_pool_1 (SV *cb)
2472	CODE:	2726	CODE:
2473	{	2727	{
2474	struct coro *coro = SvSTATE (coro_current);
2475	HV hv = (HV )SvRV (coro_current);	2728	HV hv = (HV )SvRV (coro_current);
		2729	struct coro coro = SvSTATE_hv ((SV )hv);
2476	AV *defav = GvAV (PL_defgv);	2730	AV *defav = GvAV (PL_defgv);
2477	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2731	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2478	AV *invoke_av;	2732	AV *invoke_av;
2479	int i, len;	2733	int i, len;
2480		2734
…		…
2507		2761
2508	void	2762	void
2509	_pool_2 (SV *cb)	2763	_pool_2 (SV *cb)
2510	CODE:	2764	CODE:
2511	{	2765	{
2512	struct coro *coro = SvSTATE (coro_current);	2766	HV hv = (HV )SvRV (coro_current);
		2767	struct coro coro = SvSTATE_hv ((SV )hv);
2513		2768
2514	sv_setsv (cb, &PL_sv_undef);	2769	sv_setsv (cb, &PL_sv_undef);
2515		2770
2516	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;	2771	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
2517	coro->saved_deffh = 0;	2772	coro->saved_deffh = 0;
…		…
2524	SvREFCNT_dec (old);	2779	SvREFCNT_dec (old);
2525	croak ("\3async_pool terminate\2\n");	2780	croak ("\3async_pool terminate\2\n");
2526	}	2781	}
2527		2782
2528	av_clear (GvAV (PL_defgv));	2783	av_clear (GvAV (PL_defgv));
2529	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2784	hv_store (hv, "desc", sizeof ("desc") - 1,
2530	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2785	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2531		2786
2532	coro->prio = 0;	2787	coro->prio = 0;
2533		2788
2534	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2789	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2535	api_trace (aTHX_ coro_current, 0);	2790	api_trace (aTHX_ coro_current, 0);
2536		2791
2537	av_push (av_async_pool, newSVsv (coro_current));	2792	av_push (av_async_pool, newSVsv (coro_current));
2538	}	2793	}
2539		2794
2540	#if 0
2541
2542	void
2543	_generator_call (...)
2544	PROTOTYPE: @
2545	PPCODE:
2546	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2547	xxxx
2548	abort ();
2549
2550	SV *
2551	gensub (SV *sub, ...)
2552	PROTOTYPE: &;@
2553	CODE:
2554	{
2555	struct coro *coro;
2556	MAGIC *mg;
2557	CV *xcv;
2558	CV ncv = (CV )newSV_type (SVt_PVCV);
2559	int i;
2560
2561	CvGV (ncv) = CvGV (cv);
2562	CvFILE (ncv) = CvFILE (cv);
2563
2564	Newz (0, coro, 1, struct coro);
2565	coro->args = newAV ();
2566	coro->flags = CF_NEW;
2567
2568	av_extend (coro->args, items - 1);
2569	for (i = 1; i < items; i++)
2570	av_push (coro->args, newSVsv (ST (i)));
2571
2572	CvISXSUB_on (ncv);
2573	CvXSUBANY (ncv).any_ptr = (void *)coro;
2574
2575	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2576
2577	CvXSUB (ncv) = CvXSUB (xcv);
2578	CvANON_on (ncv);
2579
2580	mg = sv_magicext ((SV )ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char )coro, 0);
2581	RETVAL = newRV_noinc ((SV *)ncv);
2582	}
2583	OUTPUT:
2584	RETVAL
2585
2586	#endif
2587
2588
2589	MODULE = Coro::State PACKAGE = Coro::AIO
2590
2591	void
2592	_get_state (SV *self)
2593	PROTOTYPE: $
2594	PPCODE:
2595	{
2596	AV *defav = GvAV (PL_defgv);
2597	AV *av = newAV ();
2598	int i;
2599	SV *data_sv = newSV (sizeof (struct io_state));
2600	struct io_state data = (struct io_state )SvPVX (data_sv);
2601	SvCUR_set (data_sv, sizeof (struct io_state));
2602	SvPOK_only (data_sv);
2603
2604	data->errorno = errno;
2605	data->laststype = PL_laststype;
2606	data->laststatval = PL_laststatval;
2607	data->statcache = PL_statcache;
2608
2609	av_extend (av, AvFILLp (defav) + 1 + 1);
2610
2611	for (i = 0; i <= AvFILLp (defav); ++i)
2612	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2613
2614	av_push (av, data_sv);
2615
2616	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2617
2618	api_ready (aTHX_ self);
2619	}
2620
2621	void
2622	_set_state (SV *state)
2623	PROTOTYPE: $
2624	PPCODE:
2625	{
2626	AV av = (AV )SvRV (state);
2627	struct io_state data = (struct io_state )SvPVX (AvARRAY (av)[AvFILLp (av)]);
2628	int i;
2629
2630	errno = data->errorno;
2631	PL_laststype = data->laststype;
2632	PL_laststatval = data->laststatval;
2633	PL_statcache = data->statcache;
2634
2635	EXTEND (SP, AvFILLp (av));
2636	for (i = 0; i < AvFILLp (av); ++i)
2637	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2638	}
2639
2640
2641	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2642
2643	BOOT:
2644	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2645
2646	SV *
2647	_schedule (...)
2648	CODE:
2649	{
2650	static int incede;
2651
2652	api_cede_notself (aTHX);
2653
2654	++incede;
2655	while (coro_nready >= incede && api_cede (aTHX))
2656	;
2657
2658	sv_setsv (sv_activity, &PL_sv_undef);
2659	if (coro_nready >= incede)
2660	{
2661	PUSHMARK (SP);
2662	PUTBACK;
2663	call_pv ("Coro::AnyEvent::_activity", G_DISCARD \| G_EVAL);
2664	SPAGAIN;
2665	}
2666
2667	--incede;
2668	}
2669
2670		2795
2671	MODULE = Coro::State PACKAGE = PerlIO::cede	2796	MODULE = Coro::State PACKAGE = PerlIO::cede
2672		2797
2673	BOOT:	2798	BOOT:
2674	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2799	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2800
2675		2801
2676	MODULE = Coro::State PACKAGE = Coro::Semaphore	2802	MODULE = Coro::State PACKAGE = Coro::Semaphore
2677		2803
2678	SV *	2804	SV *
2679	new (SV klass, SV count_ = 0)	2805	new (SV klass, SV count_ = 0)
2680	CODE:	2806	CODE:
2681	{	2807	{
2682	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */	2808	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2683	AV *av = newAV ();	2809	AV *av = newAV ();
		2810	SV **ary;
		2811
		2812	/* unfortunately, building manually saves memory */
		2813	Newx (ary, 2, SV *);
		2814	AvALLOC (av) = ary;
		2815	AvARRAY (av) = ary;
		2816	AvMAX (av) = 1;
		2817	AvFILLp (av) = 0;
2684	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));	2818	ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
		2819
2685	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));	2820	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2686	}	2821	}
2687	OUTPUT:	2822	OUTPUT:
2688	RETVAL	2823	RETVAL
2689		2824
…		…
2697	void	2832	void
2698	up (SV *self, int adjust = 1)	2833	up (SV *self, int adjust = 1)
2699	ALIAS:	2834	ALIAS:
2700	adjust = 1	2835	adjust = 1
2701	CODE:	2836	CODE:
2702	{	2837	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2703	AV av = (AV )SvRV (self);
2704	SV *count_sv = AvARRAY (av)[0];
2705	IV count = SvIVX (count_sv);
2706
2707	count += ix ? adjust : 1;
2708	SvIVX (count_sv) = count;
2709
2710	/* now wake up as many waiters as possible */
2711	while (count > 0 && AvFILLp (av) >= count)
2712	{
2713	SV *cb;
2714
2715	/* swap first two elements so we can shift a waiter */
2716	AvARRAY (av)[0] = AvARRAY (av)[1];
2717	AvARRAY (av)[1] = count_sv;
2718	cb = av_shift (av);
2719
2720	if (SvOBJECT (cb))
2721	api_ready (cb);
2722	else
2723	croak ("callbacks not yet supported");
2724
2725	SvREFCNT_dec (cb);
2726	}
2727	}
2728		2838
2729	void	2839	void
2730	down (SV *self)	2840	down (SV *self)
2731	CODE:	2841	CODE:
2732	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), items);	2842	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2843
		2844	void
		2845	wait (SV *self)
		2846	CODE:
		2847	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2733		2848
2734	void	2849	void
2735	try (SV *self)	2850	try (SV *self)
2736	PPCODE:	2851	PPCODE:
2737	{	2852	{
…		…
2760	else	2875	else
2761	{	2876	{
2762	int i;	2877	int i;
2763	EXTEND (SP, AvFILLp (av) + 1 - 1);	2878	EXTEND (SP, AvFILLp (av) + 1 - 1);
2764	for (i = 1; i <= AvFILLp (av); ++i)	2879	for (i = 1; i <= AvFILLp (av); ++i)
2765	PUSHs (newSVsv (AvARRAY (av)[i]));	2880	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2766	}	2881	}
2767	}	2882	}
2768		2883
		2884
		2885	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2886
		2887	BOOT:
		2888	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2889
		2890	void
		2891	_schedule (...)
		2892	CODE:
		2893	{
		2894	static int incede;
		2895
		2896	api_cede_notself (aTHX);
		2897
		2898	++incede;
		2899	while (coro_nready >= incede && api_cede (aTHX))
		2900	;
		2901
		2902	sv_setsv (sv_activity, &PL_sv_undef);
		2903	if (coro_nready >= incede)
		2904	{
		2905	PUSHMARK (SP);
		2906	PUTBACK;
		2907	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		2908	}
		2909
		2910	--incede;
		2911	}
		2912
		2913
		2914	MODULE = Coro::State PACKAGE = Coro::AIO
		2915
		2916	void
		2917	_register (char target, char proto, SV *req)
		2918	CODE:
		2919	{
		2920	HV *st;
		2921	GV *gvp;
		2922	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		2923	/* newXSproto doesn't return the CV on 5.8 */
		2924	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		2925	sv_setpv ((SV *)slf_cv, proto);
		2926	sv_magicext ((SV )slf_cv, (SV )req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		2927	}
		2928

Diff Legend

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

Comparing Coro/Coro/State.xs (file contents): Revision 1.275 by root, Sat Nov 15 06:26:52 2008 UTC vs. Revision 1.298 by root, Tue Nov 18 23:20:41 2008 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.275 by root, Sat Nov 15 06:26:52 2008 UTC vs.
Revision 1.298 by root, Tue Nov 18 23:20:41 2008 UTC