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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.257 by root, Sun Nov 9 15:35:44 2008 UTC vs.
Revision 1.274 by root, Sat Nov 15 00:08:30 2008 UTC

…		…
46	# define BOOT_PAGESIZE (void)0	46	# define BOOT_PAGESIZE (void)0
47	#endif	47	#endif
48		48
49	#if CORO_USE_VALGRIND	49	#if CORO_USE_VALGRIND
50	# include <valgrind/valgrind.h>	50	# include <valgrind/valgrind.h>
51	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52	#else
53	# define REGISTER_STACK(cctx,start,end)
54	#endif	51	#endif
55		52
56	/* the maximum number of idle cctx that will be pooled */	53	/* the maximum number of idle cctx that will be pooled */
57	static int cctx_max_idle = 4;	54	static int cctx_max_idle = 4;
58		55
…		…
119	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
120	#endif	117	#endif
121		118
122	/* The next macros try to return the current stack pointer, in an as	119	/* The next macros try to return the current stack pointer, in an as
123	* portable way as possible. */	120	* portable way as possible. */
124	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
125	#define STACKLEVEL ((void *)&stacklevel)	122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
		123	#else
		124	# define dSTACKLEVEL volatile void stacklevel = (volatile void )&stacklevel
		125	#endif
126		126
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		128
129	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
130	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
131	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
133	#else	133	#else
134	# define attribute(x)	134	# define attribute(x)
135	# define BARRIER
136	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
137	#endif	137	#endif
138		138
139	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
140	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
141		141
…		…
181	static struct CoroAPI coroapi;	181	static struct CoroAPI coroapi;
182	static AV main_mainstack; / used to differentiate between $main and others */	182	static AV main_mainstack; / used to differentiate between $main and others */
183	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
184	static HV coro_state_stash, coro_stash;	184	static HV coro_state_stash, coro_stash;
185	static volatile SV coro_mortal; / will be freed/thrown after next transfer */	185	static volatile SV coro_mortal; / will be freed/thrown after next transfer */
		186	static volatile struct coro *transfer_next;
186		187
187	static GV irsgv; / $/ */	188	static GV irsgv; / $/ */
188	static GV stdoutgv; / STDOUT /	189	static GV stdoutgv; / STDOUT /
189	static SV *rv_diehook;	190	static SV *rv_diehook;
190	static SV *rv_warnhook;	191	static SV *rv_warnhook;
…		…
209	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
210	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
211	};	212	};
212		213
213	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
214	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
215	struct coro_cctx *next;	217	struct coro_cctx *next;
216		218
217	/* the stack */	219	/* the stack */
218	void *sptr;	220	void *sptr;
219	size_t ssize;	221	size_t ssize;
…		…
237	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
238	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
239	};	241	};
240		242
241	/* the structure where most of the perl state is stored, overlaid on the cxstack */	243	/* the structure where most of the perl state is stored, overlaid on the cxstack */
242	typedef struct {	244	typedef struct
		245	{
243	SV *defsv;	246	SV *defsv;
244	AV *defav;	247	AV *defav;
245	SV *errsv;	248	SV *errsv;
246	SV *irsgv;	249	SV *irsgv;
247	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
251		254
252	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	255	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
253		256
254	/* this is a structure representing a perl-level coroutine */	257	/* this is a structure representing a perl-level coroutine */
255	struct coro {	258	struct coro {
256	/* the c coroutine allocated to this perl coroutine, if any */	259	/* the C coroutine allocated to this perl coroutine, if any */
257	coro_cctx *cctx;	260	coro_cctx *cctx;
258		261
259	/* process data */	262	/* process data */
		263	struct CoroSLF slf_frame; /* saved slf frame */
260	AV *mainstack;	264	AV *mainstack;
261	perl_slots slot; / basically the saved sp */	265	perl_slots slot; / basically the saved sp */
262		266
263	AV args; / data associated with this coroutine (initial args) */	267	AV args; / data associated with this coroutine (initial args) */
264	int refcnt; /* coroutines are refcounted, yes */	268	int refcnt; /* coroutines are refcounted, yes */
…		…
279	struct coro next, prev;	283	struct coro next, prev;
280	};	284	};
281		285
282	typedef struct coro *Coro__State;	286	typedef struct coro *Coro__State;
283	typedef struct coro *Coro__State_or_hashref;	287	typedef struct coro *Coro__State_or_hashref;
		288
		289	static struct CoroSLF slf_frame; /* the current slf frame */
284		290
285	/ Coro ******************************************************************/	291	/ Coro ******************************************************************/
286		292
287	#define PRIO_MAX 3	293	#define PRIO_MAX 3
288	#define PRIO_HIGH 1	294	#define PRIO_HIGH 1
…		…
293		299
294	/* for Coro.pm */	300	/* for Coro.pm */
295	static SV *coro_current;	301	static SV *coro_current;
296	static SV *coro_readyhook;	302	static SV *coro_readyhook;
297	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
298	static int coro_nready;
299	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
300		306
301	/ lowlevel stuff ********************************************************/	307	/ lowlevel stuff ********************************************************/
302		308
303	static SV *	309	static SV *
304	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
407	: 0	413	: 0
408		414
409	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	415	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
410	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	416	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
411		417
412	static struct coro *	418	INLINE struct coro *
413	SvSTATE_ (pTHX_ SV *coro)	419	SvSTATE_ (pTHX_ SV *coro)
414	{	420	{
415	HV *stash;	421	HV *stash;
416	MAGIC *mg;	422	MAGIC *mg;
417		423
…		…
508	CvPADLIST (cv) = (AV *)POPs;	514	CvPADLIST (cv) = (AV *)POPs;
509	}	515	}
510		516
511	PUTBACK;	517	PUTBACK;
512	}	518	}
		519
		520	slf_frame = c->slf_frame;
513	}	521	}
514		522
515	static void	523	static void
516	save_perl (pTHX_ Coro__State c)	524	save_perl (pTHX_ Coro__State c)
517	{	525	{
		526	c->slf_frame = slf_frame;
		527
518	{	528	{
519	dSP;	529	dSP;
520	I32 cxix = cxstack_ix;	530	I32 cxix = cxstack_ix;
521	PERL_CONTEXT *ccstk = cxstack;	531	PERL_CONTEXT *ccstk = cxstack;
522	PERL_SI *top_si = PL_curstackinfo;	532	PERL_SI *top_si = PL_curstackinfo;
…		…
589	#undef VAR	599	#undef VAR
590	}	600	}
591	}	601	}
592		602
593	/*	603	/*
594	* allocate various perl stacks. This is an exact copy	604	* allocate various perl stacks. This is almost an exact copy
595	* of perl.c:init_stacks, except that it uses less memory	605	* of perl.c:init_stacks, except that it uses less memory
596	* on the (sometimes correct) assumption that coroutines do	606	* on the (sometimes correct) assumption that coroutines do
597	* not usually need a lot of stackspace.	607	* not usually need a lot of stackspace.
598	*/	608	*/
599	#if CORO_PREFER_PERL_FUNCTIONS	609	#if CORO_PREFER_PERL_FUNCTIONS
…		…
801		811
802	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
803	}	813	}
804		814
805	static void	815	static void
		816	prepare_nop (aTHX_ struct coro_transfer_args *ta)
		817	{
		818	/* kind of mega-hacky, but works */
		819	ta->next = ta->prev = (struct coro *)ta;
		820	}
		821
		822	static int
		823	slf_check_nop (aTHX)
		824	{
		825	return 0;
		826	}
		827
		828	static void
806	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
807	{	830	{
808	/*	831	/*
809	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
810	*/	833	*/
…		…
834	PL_rs = newSVsv (GvSV (irsgv));	857	PL_rs = newSVsv (GvSV (irsgv));
835	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	858	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
836		859
837	{	860	{
838	dSP;	861	dSP;
839	LOGOP myop;	862	UNOP myop;
840		863
841	Zero (&myop, 1, LOGOP);	864	Zero (&myop, 1, UNOP);
842	myop.op_next = Nullop;	865	myop.op_next = Nullop;
843	myop.op_flags = OPf_WANT_VOID;	866	myop.op_flags = OPf_WANT_VOID;
844		867
845	PUSHMARK (SP);	868	PUSHMARK (SP);
846	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
849	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
850	SPAGAIN;	873	SPAGAIN;
851	}	874	}
852		875
853	/* this newly created coroutine might be run on an existing cctx which most	876	/* this newly created coroutine might be run on an existing cctx which most
854	* likely was suspended in set_stacklevel, called from entersub.	877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
855	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
856	* so we ENTER here for symmetry
857	*/	878	*/
858	ENTER;	879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		880	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
859	}	881	}
860		882
861	static void	883	static void
862	coro_destruct (pTHX_ struct coro *coro)	884	coro_destruct (pTHX_ struct coro *coro)
863	{	885	{
…		…
892	SvREFCNT_dec (coro->throw);	914	SvREFCNT_dec (coro->throw);
893		915
894	coro_destruct_stacks (aTHX);	916	coro_destruct_stacks (aTHX);
895	}	917	}
896		918
897	static void	919	INLINE void
898	free_coro_mortal (pTHX)	920	free_coro_mortal (pTHX)
899	{	921	{
900	if (expect_true (coro_mortal))	922	if (expect_true (coro_mortal))
901	{	923	{
902	SvREFCNT_dec (coro_mortal);	924	SvREFCNT_dec (coro_mortal);
…		…
1026		1048
1027	TAINT_NOT;	1049	TAINT_NOT;
1028	return 0;	1050	return 0;
1029	}	1051	}
1030		1052
		1053	static void
		1054	prepare_set_stacklevel (struct coro_transfer_args ta, struct coro_cctx cctx)
		1055	{
		1056	ta->prev = (struct coro *)cctx;
		1057	ta->next = 0;
		1058	}
		1059
1031	/* inject a fake call to Coro::State::_cctx_init into the execution */	1060	/* inject a fake call to Coro::State::_cctx_init into the execution */
1032	/* _cctx_init should be careful, as it could be called at almost any time */	1061	/* _cctx_init should be careful, as it could be called at almost any time */
1033	/* during execution of a perl program */	1062	/* during execution of a perl program */
		1063	/* also initialises PL_top_env */
1034	static void NOINLINE	1064	static void NOINLINE
1035	cctx_prepare (pTHX_ coro_cctx *cctx)	1065	cctx_prepare (pTHX_ coro_cctx *cctx)
1036	{	1066	{
1037	dSP;	1067	dSP;
1038	LOGOP myop;	1068	UNOP myop;
1039		1069
1040	PL_top_env = &PL_start_env;	1070	PL_top_env = &PL_start_env;
1041		1071
1042	if (cctx->flags & CC_TRACE)	1072	if (cctx->flags & CC_TRACE)
1043	PL_runops = runops_trace;	1073	PL_runops = runops_trace;
1044		1074
1045	Zero (&myop, 1, LOGOP);	1075	Zero (&myop, 1, UNOP);
1046	myop.op_next = PL_op;	1076	myop.op_next = PL_op;
1047	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	1077	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
1048		1078
1049	PUSHMARK (SP);	1079	PUSHMARK (SP);
1050	EXTEND (SP, 2);	1080	EXTEND (SP, 2);
1051	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1052	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1053	PUTBACK;	1083	PUTBACK;
1054	PL_op = (OP *)&myop;	1084	PL_op = (OP *)&myop;
1055	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1056	SPAGAIN;	1086	SPAGAIN;
1057	}	1087	}
1058		1088
		1089	/* the tail of transfer: execute stuff we can only do after a transfer */
		1090	INLINE void
		1091	transfer_tail (pTHX)
		1092	{
		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);
		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	}
		1109
1059	/*	1110	/*
1060	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1061	*/	1112	*/
1062	static void	1113	static void
1063	cctx_run (void *arg)	1114	cctx_run (void *arg)
…		…
1068	# endif	1119	# endif
1069	#endif	1120	#endif
1070	{	1121	{
1071	dTHX;	1122	dTHX;
1072		1123
1073	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1124	/* normally we would need to skip the entersub here */
1074	UNLOCK;	1125	/* not doing so will re-execute it, which is exactly what we want */
1075
1076	/* we now skip the entersub that lead to transfer() */
1077	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
1078		1127
1079	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1080	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1130
		1131	/* cctx_run is the alternative tail of transfer() */
		1132	/* TODO: throwing an exception here might be deadly, VERIFY */
		1133	transfer_tail (aTHX);
1081		1134
1082	/* somebody or something will hit me for both perl_run and PL_restartop */	1135	/* somebody or something will hit me for both perl_run and PL_restartop */
1083	PL_restartop = PL_op;	1136	PL_restartop = PL_op;
1084	perl_run (PL_curinterp);	1137	perl_run (PL_curinterp);
1085		1138
…		…
1097		1150
1098	static coro_cctx *	1151	static coro_cctx *
1099	cctx_new ()	1152	cctx_new ()
1100	{	1153	{
1101	coro_cctx *cctx;	1154	coro_cctx *cctx;
		1155
		1156	++cctx_count;
		1157	New (0, cctx, 1, coro_cctx);
		1158
		1159	cctx->gen = cctx_gen;
		1160	cctx->flags = 0;
		1161	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1162
		1163	return cctx;
		1164	}
		1165
		1166	/* create a new cctx only suitable as source */
		1167	static coro_cctx *
		1168	cctx_new_empty ()
		1169	{
		1170	coro_cctx *cctx = cctx_new ();
		1171
		1172	cctx->sptr = 0;
		1173	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1174
		1175	return cctx;
		1176	}
		1177
		1178	/* create a new cctx suitable as destination/running a perl interpreter */
		1179	static coro_cctx *
		1180	cctx_new_run ()
		1181	{
		1182	coro_cctx *cctx = cctx_new ();
1102	void *stack_start;	1183	void *stack_start;
1103	size_t stack_size;	1184	size_t stack_size;
1104
1105	++cctx_count;
1106	Newz (0, cctx, 1, coro_cctx);
1107
1108	cctx->gen = cctx_gen;
1109		1185
1110	#if HAVE_MMAP	1186	#if HAVE_MMAP
1111	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1187	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1112	/* mmap supposedly does allocate-on-write for us */	1188	/* mmap supposedly does allocate-on-write for us */
1113	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1189	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
1114		1190
1115	if (cctx->sptr != (void *)-1)	1191	if (cctx->sptr != (void *)-1)
1116	{	1192	{
1117	# if CORO_STACKGUARD	1193	#if CORO_STACKGUARD
1118	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1194	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1119	# endif	1195	#endif
1120	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1196	stack_start = (char )cctx->sptr + CORO_STACKGUARD PAGESIZE;
1121	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1197	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1122	cctx->flags \|= CC_MAPPED;	1198	cctx->flags \|= CC_MAPPED;
1123	}	1199	}
1124	else	1200	else
1125	#endif	1201	#endif
1126	{	1202	{
1127	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1203	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1128	New (0, cctx->sptr, cctx_stacksize, long);	1204	New (0, cctx->sptr, cctx_stacksize, long);
1129		1205
1130	if (!cctx->sptr)	1206	if (!cctx->sptr)
1131	{	1207	{
1132	perror ("FATAL: unable to allocate stack for coroutine");	1208	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1133	_exit (EXIT_FAILURE);	1209	_exit (EXIT_FAILURE);
1134	}	1210	}
1135		1211
1136	stack_start = cctx->sptr;	1212	stack_start = cctx->sptr;
1137	stack_size = cctx->ssize;	1213	stack_size = cctx->ssize;
1138	}	1214	}
1139		1215
1140	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);	1216	#if CORO_USE_VALGRIND
		1217	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char )stack_start, (char )stack_start + stack_size);
		1218	#endif
		1219
1141	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1220	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1142		1221
1143	return cctx;	1222	return cctx;
1144	}	1223	}
1145		1224
…		…
1153	coro_destroy (&cctx->cctx);	1232	coro_destroy (&cctx->cctx);
1154		1233
1155	/* coro_transfer creates new, empty cctx's */	1234	/* coro_transfer creates new, empty cctx's */
1156	if (cctx->sptr)	1235	if (cctx->sptr)
1157	{	1236	{
1158	#if CORO_USE_VALGRIND	1237	#if CORO_USE_VALGRIND
1159	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1238	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1160	#endif	1239	#endif
1161		1240
1162	#if HAVE_MMAP	1241	#if HAVE_MMAP
1163	if (cctx->flags & CC_MAPPED)	1242	if (cctx->flags & CC_MAPPED)
1164	munmap (cctx->sptr, cctx->ssize);	1243	munmap (cctx->sptr, cctx->ssize);
1165	else	1244	else
…		…
1186	return cctx;	1265	return cctx;
1187		1266
1188	cctx_destroy (cctx);	1267	cctx_destroy (cctx);
1189	}	1268	}
1190		1269
1191	return cctx_new ();	1270	return cctx_new_run ();
1192	}	1271	}
1193		1272
1194	static void	1273	static void
1195	cctx_put (coro_cctx *cctx)	1274	cctx_put (coro_cctx *cctx)
1196	{	1275	{
1197	assert (("cctx_put called on non-initialised cctx", cctx->sptr));	1276	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1198		1277
1199	/* free another cctx if overlimit */	1278	/* free another cctx if overlimit */
1200	if (expect_false (cctx_idle >= cctx_max_idle))	1279	if (expect_false (cctx_idle >= cctx_max_idle))
1201	{	1280	{
1202	coro_cctx *first = cctx_first;	1281	coro_cctx *first = cctx_first;
…		…
1217	transfer_check (pTHX_ struct coro prev, struct coro next)	1296	transfer_check (pTHX_ struct coro prev, struct coro next)
1218	{	1297	{
1219	if (expect_true (prev != next))	1298	if (expect_true (prev != next))
1220	{	1299	{
1221	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))	1300	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
1222	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1301	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1223		1302
1224	if (expect_false (next->flags & CF_RUNNING))	1303	if (expect_false (next->flags & CF_RUNNING))
1225	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1304	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1226		1305
1227	if (expect_false (next->flags & CF_DESTROYED))	1306	if (expect_false (next->flags & CF_DESTROYED))
1228	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1307	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1229		1308
1230	#if !PERL_VERSION_ATLEAST (5,10,0)	1309	#if !PERL_VERSION_ATLEAST (5,10,0)
1231	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1310	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1232	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1311	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1233	#endif	1312	#endif
1234	}	1313	}
1235	}	1314	}
1236		1315
1237	/* always use the TRANSFER macro */	1316	/* always use the TRANSFER macro */
…		…
1241	dSTACKLEVEL;	1320	dSTACKLEVEL;
1242		1321
1243	/* sometimes transfer is only called to set idle_sp */	1322	/* sometimes transfer is only called to set idle_sp */
1244	if (expect_false (!next))	1323	if (expect_false (!next))
1245	{	1324	{
1246	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1325	((coro_cctx *)prev)->idle_sp = stacklevel;
1247	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */	1326	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
1248	}	1327	}
1249	else if (expect_true (prev != next))	1328	else if (expect_true (prev != next))
1250	{	1329	{
1251	static volatile int has_throw;
1252	coro_cctx *prev__cctx;	1330	coro_cctx *prev__cctx;
1253		1331
1254	if (expect_false (prev->flags & CF_NEW))	1332	if (expect_false (prev->flags & CF_NEW))
1255	{	1333	{
1256	/* create a new empty/source context */	1334	/* create a new empty/source context */
1257	++cctx_count;	1335	prev->cctx = cctx_new_empty ();
1258	New (0, prev->cctx, 1, coro_cctx);
1259	prev->cctx->sptr = 0;
1260	coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1261
1262	prev->flags &= ~CF_NEW;	1336	prev->flags &= ~CF_NEW;
1263	prev->flags \|= CF_RUNNING;	1337	prev->flags \|= CF_RUNNING;
1264	}	1338	}
1265		1339
1266	prev->flags &= ~CF_RUNNING;	1340	prev->flags &= ~CF_RUNNING;
…		…
1281	else	1355	else
1282	load_perl (aTHX_ next);	1356	load_perl (aTHX_ next);
1283		1357
1284	prev__cctx = prev->cctx;	1358	prev__cctx = prev->cctx;
1285		1359
1286	/* possibly "free" the cctx */	1360	/* possibly untie and reuse the cctx */
1287	if (expect_true (	1361	if (expect_true (
1288	prev__cctx->idle_sp == STACKLEVEL	1362	prev__cctx->idle_sp == stacklevel
1289	&& !(prev__cctx->flags & CC_TRACE)	1363	&& !(prev__cctx->flags & CC_TRACE)
1290	&& !force_cctx	1364	&& !force_cctx
1291	))	1365	))
1292	{	1366	{
1293	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1367	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1294	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1368	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1295		1369
1296	prev->cctx = 0;	1370	prev->cctx = 0;
1297		1371
1298	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1372	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1299	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1373	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1307	++next->usecount;	1381	++next->usecount;
1308		1382
1309	if (expect_true (!next->cctx))	1383	if (expect_true (!next->cctx))
1310	next->cctx = cctx_get (aTHX);	1384	next->cctx = cctx_get (aTHX);
1311		1385
1312	has_throw = !!next->throw;	1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1387	transfer_next = next;
1313		1388
1314	if (expect_false (prev__cctx != next->cctx))	1389	if (expect_false (prev__cctx != next->cctx))
1315	{	1390	{
1316	prev__cctx->top_env = PL_top_env;	1391	prev__cctx->top_env = PL_top_env;
1317	PL_top_env = next->cctx->top_env;	1392	PL_top_env = next->cctx->top_env;
1318	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1319	}	1394	}
1320		1395
1321	free_coro_mortal (aTHX);	1396	transfer_tail (aTHX);
1322	UNLOCK;
1323
1324	if (expect_false (has_throw))
1325	{
1326	struct coro *coro = SvSTATE (coro_current);
1327
1328	if (coro->throw)
1329	{
1330	SV *exception = coro->throw;
1331	coro->throw = 0;
1332	sv_setsv (ERRSV, exception);
1333	croak (0);
1334	}
1335	}
1336	}	1397	}
1337	}	1398	}
1338
1339	struct transfer_args
1340	{
1341	struct coro prev, next;
1342	};
1343		1399
1344	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1400	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1345	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1401	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1346		1402
1347	/ high level stuff ******************************************************/	1403	/ high level stuff ******************************************************/
…		…
1367		1423
1368	if (coro->mainstack && coro->mainstack != main_mainstack)	1424	if (coro->mainstack && coro->mainstack != main_mainstack)
1369	{	1425	{
1370	struct coro temp;	1426	struct coro temp;
1371		1427
1372	if (coro->flags & CF_RUNNING)	1428	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1373	croak ("FATAL: tried to destroy currently running coroutine");
1374		1429
1375	save_perl (aTHX_ &temp);	1430	save_perl (aTHX_ &temp);
1376	load_perl (aTHX_ coro);	1431	load_perl (aTHX_ coro);
1377		1432
1378	coro_destruct (aTHX_ coro);	1433	coro_destruct (aTHX_ coro);
…		…
1429	# define MGf_DUP 0	1484	# define MGf_DUP 0
1430	#endif	1485	#endif
1431	};	1486	};
1432		1487
1433	static void	1488	static void
1434	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)	1489	prepare_transfer (pTHX_ struct coro_transfer_args ta, SV prev_sv, SV *next_sv)
1435	{	1490	{
1436	ta->prev = SvSTATE (prev_sv);	1491	ta->prev = SvSTATE (prev_sv);
1437	ta->next = SvSTATE (next_sv);	1492	ta->next = SvSTATE (next_sv);
1438	TRANSFER_CHECK (*ta);	1493	TRANSFER_CHECK (*ta);
1439	}	1494	}
1440		1495
1441	static void	1496	static void
1442	api_transfer (SV prev_sv, SV next_sv)	1497	api_transfer (pTHX_ SV prev_sv, SV next_sv)
1443	{	1498	{
1444	dTHX;
1445	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1446		1500
1447	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1448	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1449	}	1503	}
1450		1504
…		…
1467		1521
1468	return 0;	1522	return 0;
1469	}	1523	}
1470		1524
1471	static int	1525	static int
1472	api_ready (SV *coro_sv)	1526	api_ready (pTHX_ SV *coro_sv)
1473	{	1527	{
1474	dTHX;
1475	struct coro *coro;	1528	struct coro *coro;
1476	SV *sv_hook;	1529	SV *sv_hook;
1477	void (*xs_hook)(void);	1530	void (*xs_hook)(void);
1478		1531
1479	if (SvROK (coro_sv))	1532	if (SvROK (coro_sv))
…		…
1517		1570
1518	return 1;	1571	return 1;
1519	}	1572	}
1520		1573
1521	static int	1574	static int
1522	api_is_ready (SV *coro_sv)	1575	api_is_ready (pTHX_ SV *coro_sv)
1523	{	1576	{
1524	dTHX;
1525	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1526	}	1578	}
1527		1579
1528	static void	1580	INLINE void
1529	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1530	{	1582	{
1531	SV prev_sv, next_sv;	1583	SV prev_sv, next_sv;
1532		1584
1533	for (;;)	1585	for (;;)
1534	{	1586	{
…		…
1559	/* cannot transfer to destroyed coros, skip and look for next */	1611	/* cannot transfer to destroyed coros, skip and look for next */
1560	if (expect_false (ta->next->flags & CF_DESTROYED))	1612	if (expect_false (ta->next->flags & CF_DESTROYED))
1561	{	1613	{
1562	UNLOCK;	1614	UNLOCK;
1563	SvREFCNT_dec (next_sv);	1615	SvREFCNT_dec (next_sv);
1564	/* coro_nready is already taken care of by destroy */	1616	/* coro_nready has already been taken care of by destroy */
1565	continue;	1617	continue;
1566	}	1618	}
1567		1619
1568	--coro_nready;	1620	--coro_nready;
1569	UNLOCK;	1621	UNLOCK;
…		…
1572		1624
1573	/* free this only after the transfer */	1625	/* free this only after the transfer */
1574	prev_sv = SvRV (coro_current);	1626	prev_sv = SvRV (coro_current);
1575	ta->prev = SvSTATE (prev_sv);	1627	ta->prev = SvSTATE (prev_sv);
1576	TRANSFER_CHECK (*ta);	1628	TRANSFER_CHECK (*ta);
1577	assert (ta->next->flags & CF_READY);	1629	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1578	ta->next->flags &= ~CF_READY;	1630	ta->next->flags &= ~CF_READY;
1579	SvRV_set (coro_current, next_sv);	1631	SvRV_set (coro_current, next_sv);
1580		1632
1581	LOCK;	1633	LOCK;
1582	free_coro_mortal (aTHX);	1634	free_coro_mortal (aTHX);
1583	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1584	UNLOCK;	1636	UNLOCK;
1585	}	1637	}
1586		1638
1587	static void	1639	INLINE void
1588	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1589	{	1641	{
1590	api_ready (coro_current);	1642	api_ready (aTHX_ coro_current);
1591	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1592	}	1644	}
1593		1645
		1646	INLINE void
		1647	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1648	{
		1649	SV *prev = SvRV (coro_current);
		1650
		1651	if (coro_nready)
		1652	{
		1653	prepare_schedule (aTHX_ ta);
		1654	api_ready (aTHX_ prev);
		1655	}
		1656	else
		1657	prepare_nop (aTHX_ ta);
		1658	}
		1659
		1660	static void
		1661	api_schedule (pTHX)
		1662	{
		1663	struct coro_transfer_args ta;
		1664
		1665	prepare_schedule (aTHX_ &ta);
		1666	TRANSFER (ta, 1);
		1667	}
		1668
1594	static int	1669	static int
1595	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1670	api_cede (pTHX)
1596	{	1671	{
1597	if (coro_nready)	1672	struct coro_transfer_args ta;
1598	{	1673
1599	SV *prev = SvRV (coro_current);
1600	prepare_schedule (aTHX_ ta);	1674	prepare_cede (aTHX_ &ta);
1601	api_ready (prev);	1675
		1676	if (expect_true (ta.prev != ta.next))
		1677	{
		1678	TRANSFER (ta, 1);
1602	return 1;	1679	return 1;
1603	}	1680	}
1604	else	1681	else
1605	return 0;	1682	return 0;
1606	}	1683	}
1607		1684
1608	static void
1609	api_schedule (void)
1610	{
1611	dTHX;
1612	struct transfer_args ta;
1613
1614	prepare_schedule (aTHX_ &ta);
1615	TRANSFER (ta, 1);
1616	}
1617
1618	static int	1685	static int
1619	api_cede (void)	1686	api_cede_notself (pTHX)
1620	{	1687	{
1621	dTHX;	1688	if (coro_nready)
		1689	{
1622	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1623		1691
1624	prepare_cede (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1625
1626	if (expect_true (ta.prev != ta.next))
1627	{
1628	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1629	return 1;	1694	return 1;
1630	}	1695	}
1631	else	1696	else
1632	return 0;	1697	return 0;
1633	}	1698	}
1634		1699
1635	static int	1700	static void
1636	api_cede_notself (void)
1637	{
1638	dTHX;
1639	struct transfer_args ta;
1640
1641	if (prepare_cede_notself (aTHX_ &ta))
1642	{
1643	TRANSFER (ta, 1);
1644	return 1;
1645	}
1646	else
1647	return 0;
1648	}
1649
1650	static void
1651	api_trace (SV *coro_sv, int flags)	1701	api_trace (pTHX_ SV *coro_sv, int flags)
1652	{	1702	{
1653	dTHX;
1654	struct coro *coro = SvSTATE (coro_sv);	1703	struct coro *coro = SvSTATE (coro_sv);
1655		1704
1656	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1657	{	1706	{
1658	if (!coro->cctx)	1707	if (!coro->cctx)
1659	coro->cctx = cctx_new ();	1708	coro->cctx = cctx_new_run ();
1660	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1661	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1662		1711
1663	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));	1712	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
1664	}	1713	}
1665	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1666	{	1715	{
…		…
1725	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1774	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726	double now = nvtime ();	1775	double now = nvtime ();
1727		1776
1728	if (now >= self->next)	1777	if (now >= self->next)
1729	{	1778	{
1730	api_cede ();	1779	api_cede (aTHX);
1731	self->next = now + self->every;	1780	self->next = now + self->every;
1732	}	1781	}
1733		1782
1734	return PerlIOBuf_flush (aTHX_ f);	1783	return PerlIOBuf_flush (aTHX_ f);
1735	}	1784	}
…		…
1764	PerlIOBuf_get_ptr,	1813	PerlIOBuf_get_ptr,
1765	PerlIOBuf_get_cnt,	1814	PerlIOBuf_get_cnt,
1766	PerlIOBuf_set_ptrcnt,	1815	PerlIOBuf_set_ptrcnt,
1767	};	1816	};
1768		1817
		1818	/*****************************************************************************/
		1819
		1820	static const CV slf_cv; / for quick consistency check */
		1821
		1822	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1823	static SV *slf_arg0;
		1824	static SV *slf_arg1;
		1825	static SV *slf_arg2;
		1826
		1827	/* this restores the stack in the case we patched the entersub, to */
		1828	/* recreate the stack frame as perl will on following calls */
		1829	/* since entersub cleared the stack */
		1830	static OP *
		1831	pp_restore (pTHX)
		1832	{
		1833	dSP;
		1834
		1835	PUSHMARK (SP);
		1836
		1837	EXTEND (SP, 3);
		1838	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1839	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1840	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1841	PUSHs ((SV *)CvGV (slf_cv));
		1842
		1843	RETURNOP (slf_restore.op_first);
		1844	}
		1845
		1846	static void
		1847	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1848	{
		1849	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1850	}
		1851
		1852	static void
		1853	slf_init_set_stacklevel (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1854	{
		1855	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1856
		1857	frame->prepare = slf_prepare_set_stacklevel;
		1858	frame->check = slf_check_nop;
		1859	frame->data = (void *)SvIV (arg [0]);
		1860	}
		1861
		1862	static void
		1863	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1864	{
		1865	SV arg = (SV )slf_frame.data;
		1866
		1867	prepare_transfer (ta, arg [0], arg [1]);
		1868	}
		1869
		1870	static void
		1871	slf_init_transfer (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1872	{
		1873	if (items != 2)
		1874	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1875
		1876	frame->prepare = slf_prepare_transfer;
		1877	frame->check = slf_check_nop;
		1878	frame->data = (void )arg; / let's hope it will stay valid */
		1879	}
		1880
		1881	static void
		1882	slf_init_schedule (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1883	{
		1884	frame->prepare = prepare_schedule;
		1885	frame->check = slf_check_nop;
		1886	}
		1887
		1888	static void
		1889	slf_init_cede (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1890	{
		1891	frame->prepare = prepare_cede;
		1892	frame->check = slf_check_nop;
		1893	}
		1894
		1895	static void
		1896	slf_init_cede_notself (pTHX_ struct CoroSLF frame, SV *arg, int items)
		1897	{
		1898	frame->prepare = prepare_cede_notself;
		1899	frame->check = slf_check_nop;
		1900	}
		1901
		1902	/* we hijack an hopefully unused CV flag for our purposes */
		1903	#define CVf_SLF 0x4000
		1904
		1905	/*
		1906	* these not obviously related functions are all rolled into one
		1907	* function to increase chances that they all will call transfer with the same
		1908	* stack offset
		1909	* SLF stands for "schedule-like-function".
		1910	*/
		1911	static OP *
		1912	pp_slf (pTHX)
		1913	{
		1914	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1915
		1916	/* set up the slf frame, unless it has already been set-up */
		1917	/* the latter happens when a new coro has been started */
		1918	/* or when a new cctx was attached to an existing coroutine */
		1919	if (expect_true (!slf_frame.prepare))
		1920	{
		1921	/* first iteration */
		1922	dSP;
		1923	SV **arg = PL_stack_base + TOPMARK + 1;
		1924	int items = SP - arg; /* args without function object */
		1925	SV gv = sp;
		1926
		1927	/* do a quick consistency check on the "function" object, and if it isn't */
		1928	/* for us, divert to the real entersub */
		1929	if (SvTYPE (gv) != SVt_PVGV \|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1930	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1931
		1932	/* pop args */
		1933	SP = PL_stack_base + POPMARK;
		1934
		1935	if (!(PL_op->op_flags & OPf_STACKED))
		1936	{
		1937	/* ampersand-form of call, use @_ instead of stack */
		1938	AV *av = GvAV (PL_defgv);
		1939	arg = AvARRAY (av);
		1940	items = AvFILLp (av) + 1;
		1941	}
		1942
		1943	PUTBACK;
		1944
		1945	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
		1946	}
		1947
		1948	/* now interpret the slf_frame */
		1949	/* we use a callback system not to make the code needlessly */
		1950	/* complicated, but so we can run multiple perl coros from one cctx */
		1951
		1952	do
		1953	{
		1954	struct coro_transfer_args ta;
		1955
		1956	slf_frame.prepare (aTHX_ &ta);
		1957	TRANSFER (ta, 0);
		1958
		1959	checkmark = PL_stack_sp - PL_stack_base;
		1960	}
		1961	while (slf_frame.check (aTHX_ &slf_frame));
		1962
		1963	{
		1964	dSP;
		1965	SV **bot = PL_stack_base + checkmark;
		1966	int gimme = GIMME_V;
		1967
		1968	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
		1969
		1970	/* make sure we put something on the stack in scalar context */
		1971	if (gimme == G_SCALAR)
		1972	{
		1973	if (sp == bot)
		1974	XPUSHs (&PL_sv_undef);
		1975
		1976	SP = bot + 1;
		1977	}
		1978
		1979	PUTBACK;
		1980	}
		1981
		1982	return NORMAL;
		1983	}
		1984
		1985	static void
		1986	api_execute_slf (pTHX_ CV cv, coro_slf_cb init_cb, SV *arg, int items)
		1987	{
		1988	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1989
		1990	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1991	&& PL_op->op_ppaddr != pp_slf)
		1992	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1993
		1994	if (items > 3)
		1995	croak ("Coro only supports up to three arguments to SLF functions currently, caught");
		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	}
1769		2017
1770	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2018	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1771		2019
1772	PROTOTYPES: DISABLE	2020	PROTOTYPES: DISABLE
1773		2021
…		…
1803	main_top_env = PL_top_env;	2051	main_top_env = PL_top_env;
1804		2052
1805	while (main_top_env->je_prev)	2053	while (main_top_env->je_prev)
1806	main_top_env = main_top_env->je_prev;	2054	main_top_env = main_top_env->je_prev;
1807		2055
1808	coroapi.ver = CORO_API_VERSION;	2056	coroapi.ver = CORO_API_VERSION;
1809	coroapi.rev = CORO_API_REVISION;	2057	coroapi.rev = CORO_API_REVISION;
		2058
1810	coroapi.transfer = api_transfer;	2059	coroapi.transfer = api_transfer;
		2060
		2061	coroapi.sv_state = SvSTATE_;
		2062	coroapi.execute_slf = api_execute_slf;
		2063	coroapi.prepare_nop = prepare_nop;
		2064	coroapi.prepare_schedule = prepare_schedule;
		2065	coroapi.prepare_cede = prepare_cede;
		2066	coroapi.prepare_cede_notself = prepare_cede_notself;
1811		2067
1812	{	2068	{
1813	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2069	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1814		2070
1815	if (!svp) croak ("Time::HiRes is required");	2071	if (!svp) croak ("Time::HiRes is required");
…		…
1848	av_push (coro->args, newSVsv (ST (i)));	2104	av_push (coro->args, newSVsv (ST (i)));
1849	}	2105	}
1850	OUTPUT:	2106	OUTPUT:
1851	RETVAL	2107	RETVAL
1852		2108
1853	# these not obviously related functions are all rolled into the same xs
1854	# function to increase chances that they all will call transfer with the same
1855	# stack offset
1856	void	2109	void
1857	_set_stacklevel (...)	2110	_set_stacklevel (...)
1858	ALIAS:	2111	CODE:
1859	Coro::State::transfer = 1	2112	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1860	Coro::schedule = 2
1861	Coro::cede = 3
1862	Coro::cede_notself = 4
1863	CODE:
1864	{
1865	struct transfer_args ta;
1866		2113
1867	PUTBACK;	2114	void
1868	switch (ix)	2115	transfer (...)
1869	{	2116	CODE:
1870	case 0:	2117	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1871	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1872	ta.next = 0;
1873	break;
1874
1875	case 1:
1876	if (items != 2)
1877	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1878
1879	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1880	break;
1881
1882	case 2:
1883	prepare_schedule (aTHX_ &ta);
1884	break;
1885
1886	case 3:
1887	prepare_cede (aTHX_ &ta);
1888	break;
1889
1890	case 4:
1891	if (!prepare_cede_notself (aTHX_ &ta))
1892	XSRETURN_EMPTY;
1893
1894	break;
1895	}
1896	SPAGAIN;
1897
1898	BARRIER;
1899	PUTBACK;
1900	TRANSFER (ta, 0);
1901	SPAGAIN; /* might be the sp of a different coroutine now */
1902	/* be extra careful not to ever do anything after TRANSFER */
1903	}
1904		2118
1905	bool	2119	bool
1906	_destroy (SV *coro_sv)	2120	_destroy (SV *coro_sv)
1907	CODE:	2121	CODE:
1908	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2122	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2018	RETVAL = boolSV (coro->flags & ix);	2232	RETVAL = boolSV (coro->flags & ix);
2019	OUTPUT:	2233	OUTPUT:
2020	RETVAL	2234	RETVAL
2021		2235
2022	void	2236	void
		2237	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2238	PROTOTYPE: $;$
		2239	CODE:
		2240	SvREFCNT_dec (self->throw);
		2241	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2242
		2243	void
2023	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2244	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		2245	C_ARGS: aTHX_ coro, flags
2024		2246
2025	SV *	2247	SV *
2026	has_cctx (Coro::State coro)	2248	has_cctx (Coro::State coro)
2027	PROTOTYPE: $	2249	PROTOTYPE: $
2028	CODE:	2250	CODE:
…		…
2063	PROTOTYPE: $	2285	PROTOTYPE: $
2064	ALIAS:	2286	ALIAS:
2065	swap_defav = 1	2287	swap_defav = 1
2066	CODE:	2288	CODE:
2067	if (!self->slot)	2289	if (!self->slot)
2068	croak ("cannot swap state with coroutine that has no saved state");	2290	croak ("cannot swap state with coroutine that has no saved state,");
2069	else	2291	else
2070	{	2292	{
2071	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);	2293	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
2072	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;	2294	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
2073		2295
…		…
2098		2320
2099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2321	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2100	coro_ready[i] = newAV ();	2322	coro_ready[i] = newAV ();
2101		2323
2102	{	2324	{
2103	SV *sv = perl_get_sv ("Coro::API", TRUE);	2325	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2104	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2105		2326
2106	coroapi.schedule = api_schedule;	2327	coroapi.schedule = api_schedule;
2107	coroapi.cede = api_cede;	2328	coroapi.cede = api_cede;
2108	coroapi.cede_notself = api_cede_notself;	2329	coroapi.cede_notself = api_cede_notself;
2109	coroapi.ready = api_ready;	2330	coroapi.ready = api_ready;
2110	coroapi.is_ready = api_is_ready;	2331	coroapi.is_ready = api_is_ready;
2111	coroapi.nready = &coro_nready;	2332	coroapi.nready = coro_nready;
2112	coroapi.current = coro_current;	2333	coroapi.current = coro_current;
2113		2334
2114	GCoroAPI = &coroapi;	2335	GCoroAPI = &coroapi;
2115	sv_setiv (sv, (IV)&coroapi);	2336	sv_setiv (sv, (IV)&coroapi);
2116	SvREADONLY_on (sv);	2337	SvREADONLY_on (sv);
2117	}	2338	}
2118	}	2339	}
		2340
		2341	void
		2342	schedule (...)
		2343	CODE:
		2344	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), items);
		2345
		2346	void
		2347	cede (...)
		2348	CODE:
		2349	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), items);
		2350
		2351	void
		2352	cede_notself (...)
		2353	CODE:
		2354	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), items);
2119		2355
2120	void	2356	void
2121	_set_current (SV *current)	2357	_set_current (SV *current)
2122	PROTOTYPE: $	2358	PROTOTYPE: $
2123	CODE:	2359	CODE:
…		…
2157		2393
2158	SV *	2394	SV *
2159	ready (SV *self)	2395	ready (SV *self)
2160	PROTOTYPE: $	2396	PROTOTYPE: $
2161	CODE:	2397	CODE:
2162	RETVAL = boolSV (api_ready (self));	2398	RETVAL = boolSV (api_ready (aTHX_ self));
2163	OUTPUT:	2399	OUTPUT:
2164	RETVAL	2400	RETVAL
2165		2401
2166	int	2402	int
2167	nready (...)	2403	nready (...)
2168	PROTOTYPE:	2404	PROTOTYPE:
2169	CODE:	2405	CODE:
2170	RETVAL = coro_nready;	2406	RETVAL = coro_nready;
2171	OUTPUT:	2407	OUTPUT:
2172	RETVAL	2408	RETVAL
2173
2174	void
2175	throw (Coro::State self, SV *throw = &PL_sv_undef)
2176	PROTOTYPE: $;$
2177	CODE:
2178	SvREFCNT_dec (self->throw);
2179	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2180		2409
2181	# for async_pool speedup	2410	# for async_pool speedup
2182	void	2411	void
2183	_pool_1 (SV *cb)	2412	_pool_1 (SV *cb)
2184	CODE:	2413	CODE:
…		…
2244	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2473	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2245		2474
2246	coro->prio = 0;	2475	coro->prio = 0;
2247		2476
2248	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2477	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2249	api_trace (coro_current, 0);	2478	api_trace (aTHX_ coro_current, 0);
2250		2479
2251	av_push (av_async_pool, newSVsv (coro_current));	2480	av_push (av_async_pool, newSVsv (coro_current));
2252	}	2481	}
2253		2482
2254	#if 0	2483	#if 0
…		…
2326		2555
2327	av_push (av, data_sv);	2556	av_push (av, data_sv);
2328		2557
2329	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2558	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2330		2559
2331	api_ready (self);	2560	api_ready (aTHX_ self);
2332	}	2561	}
2333		2562
2334	void	2563	void
2335	_set_state (SV *state)	2564	_set_state (SV *state)
2336	PROTOTYPE: $	2565	PROTOTYPE: $
…		…
2361	PROTOTYPE: @	2590	PROTOTYPE: @
2362	CODE:	2591	CODE:
2363	{	2592	{
2364	static int incede;	2593	static int incede;
2365		2594
2366	api_cede_notself ();	2595	api_cede_notself (aTHX);
2367		2596
2368	++incede;	2597	++incede;
2369	while (coro_nready >= incede && api_cede ())	2598	while (coro_nready >= incede && api_cede (aTHX))
2370	;	2599	;
2371		2600
2372	sv_setsv (sv_activity, &PL_sv_undef);	2601	sv_setsv (sv_activity, &PL_sv_undef);
2373	if (coro_nready >= incede)	2602	if (coro_nready >= incede)
2374	{	2603	{
…		…
2384		2613
2385	MODULE = Coro::State PACKAGE = PerlIO::cede	2614	MODULE = Coro::State PACKAGE = PerlIO::cede
2386		2615
2387	BOOT:	2616	BOOT:
2388	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2617	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2618

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Comparing Coro/Coro/State.xs (file contents): Revision 1.257 by root, Sun Nov 9 15:35:44 2008 UTC vs. Revision 1.274 by root, Sat Nov 15 00:08:30 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.257 by root, Sun Nov 9 15:35:44 2008 UTC vs.
Revision 1.274 by root, Sat Nov 15 00:08:30 2008 UTC