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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.250 by root, Wed Oct 22 16:34:07 2008 UTC vs.
Revision 1.277 by root, Sat Nov 15 18:40:55 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	#define MAX_IDLE_CCTX 8	54	static int cctx_max_idle = 4;
58		55
59	#define PERL_VERSION_ATLEAST(a,b,c) \	56	#define PERL_VERSION_ATLEAST(a,b,c) \
60	(PERL_REVISION > (a) \	57	(PERL_REVISION > (a) \
61	|| (PERL_REVISION == (a) \	58	|| (PERL_REVISION == (a) \
62	&& (PERL_VERSION > (b) \	59	&& (PERL_VERSION > (b) \
…		…
81	# ifndef IS_PADCONST	78	# ifndef IS_PADCONST
82	# define IS_PADCONST(v) 0	79	# define IS_PADCONST(v) 0
83	# endif	80	# endif
84	#endif	81	#endif
85		82
		83	/* 5.11 */
		84	#ifndef CxHASARGS
		85	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		86	#endif
		87
		88	/* 5.10.0 */
		89	#ifndef SvREFCNT_inc_NN
		90	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		91	#endif
		92
86	/* 5.8.8 */	93	/* 5.8.8 */
87	#ifndef GV_NOTQUAL	94	#ifndef GV_NOTQUAL
88	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
89	#endif	96	#endif
90	#ifndef newSV	97	#ifndef newSV
91	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
92	#endif	99	#endif
93	#ifndef SvREFCNT_inc_NN
94	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
95	#endif
96
97	/* 5.11 */
98	#ifndef CxHASARGS
99	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
100	#endif
101		100
102	/* 5.8.7 */	101	/* 5.8.7 */
103	#ifndef SvRV_set	102	#ifndef SvRV_set
104	# define SvRV_set(s,v) SvRV(s) = (v)	103	# define SvRV_set(s,v) SvRV(s) = (v)
105	#endif	104	#endif
…		…
117	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
118	#endif	117	#endif
119		118
120	/* 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
121	* portable way as possible. */	120	* portable way as possible. */
122	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
123	#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
124		126
125	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
126		128
127	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
128	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
129	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
130	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
131	#else	133	#else
132	# define attribute(x)	134	# define attribute(x)
133	# define BARRIER
134	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
135	#endif	137	#endif
136		138
137	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
138	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
139		141
140	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
141		143
142	#include "CoroAPI.h"	144	#include "CoroAPI.h"
143		145
144	#ifdef USE_ITHREADS	146	#ifdef USE_ITHREADS
		147
145	static perl_mutex coro_mutex;	148	static perl_mutex coro_lock;
146	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
		151	# if CORO_PTHREAD
		152	static void *coro_thx;
		153	# endif
		154
148	#else	155	#else
		156
149	# define LOCK (void)0	157	# define LOCK (void)0
150	# define UNLOCK (void)0	158	# define UNLOCK (void)0
		159
151	#endif	160	#endif
		161
		162	# undef LOCK
		163	# define LOCK (void)0
		164	# undef UNLOCK
		165	# define UNLOCK (void)0
152		166
153	/* helper storage struct for Coro::AIO */	167	/* helper storage struct for Coro::AIO */
154	struct io_state	168	struct io_state
155	{	169	{
156	AV *res;	170	AV *res;
157	int errorno;	171	int errorno;
158	I32 laststype;	172	I32 laststype; /* U16 in 5.10.0 */
159	int laststatval;	173	int laststatval;
160	Stat_t statcache;	174	Stat_t statcache;
161	};	175	};
162		176
163	static double (*nvtime)(); /* so why doesn't it take void? */	177	static double (*nvtime)(); /* so why doesn't it take void? */
164		178
		179	static U32 cctx_gen;
165	static size_t coro_stacksize = CORO_STACKSIZE;	180	static size_t cctx_stacksize = CORO_STACKSIZE;
166	static struct CoroAPI coroapi;	181	static struct CoroAPI coroapi;
167	static AV *main_mainstack; /* used to differentiate between $main and others */	182	static AV *main_mainstack; /* used to differentiate between $main and others */
168	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
169	static HV *coro_state_stash, *coro_stash;	184	static HV *coro_state_stash, *coro_stash;
170	static volatile SV *coro_mortal; /* will be freed after next transfer */	185	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
		186	static volatile struct coro *transfer_next;
171		187
172	static GV *irsgv; /* $/ */	188	static GV *irsgv; /* $/ */
173	static GV *stdoutgv; /* *STDOUT */	189	static GV *stdoutgv; /* *STDOUT */
174	static SV *rv_diehook;	190	static SV *rv_diehook;
175	static SV *rv_warnhook;	191	static SV *rv_warnhook;
…		…
194	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
195	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196	};	212	};
197		213
198	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
199	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
200	struct coro_cctx *next;	217	struct coro_cctx *next;
201		218
202	/* the stack */	219	/* the stack */
203	void *sptr;	220	void *sptr;
204	size_t ssize;	221	size_t ssize;
…		…
207	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	224	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
208	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	225	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
209	JMPENV *top_env;	226	JMPENV *top_env;
210	coro_context cctx;	227	coro_context cctx;
211		228
		229	U32 gen;
212	#if CORO_USE_VALGRIND	230	#if CORO_USE_VALGRIND
213	int valgrind_id;	231	int valgrind_id;
214	#endif	232	#endif
215	unsigned char flags;	233	unsigned char flags;
216	} coro_cctx;	234	} coro_cctx;
…		…
221	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
222	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
223	};	241	};
224		242
225	/* 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 */
226	typedef struct {	244	typedef struct
		245	{
227	SV *defsv;	246	SV *defsv;
228	AV *defav;	247	AV *defav;
229	SV *errsv;	248	SV *errsv;
230	SV *irsgv;	249	SV *irsgv;
231	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
235		254
236	#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))
237		256
238	/* this is a structure representing a perl-level coroutine */	257	/* this is a structure representing a perl-level coroutine */
239	struct coro {	258	struct coro {
240	/* the c coroutine allocated to this perl coroutine, if any */	259	/* the C coroutine allocated to this perl coroutine, if any */
241	coro_cctx *cctx;	260	coro_cctx *cctx;
242		261
243	/* process data */	262	/* process data */
		263	struct CoroSLF slf_frame; /* saved slf frame */
244	AV *mainstack;	264	AV *mainstack;
245	perl_slots *slot; /* basically the saved sp */	265	perl_slots *slot; /* basically the saved sp */
246		266
247	AV *args; /* data associated with this coroutine (initial args) */	267	AV *args; /* data associated with this coroutine (initial args) */
248	int refcnt; /* coroutines are refcounted, yes */	268	int refcnt; /* coroutines are refcounted, yes */
…		…
263	struct coro *next, *prev;	283	struct coro *next, *prev;
264	};	284	};
265		285
266	typedef struct coro *Coro__State;	286	typedef struct coro *Coro__State;
267	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 */
268		290
269	/** Coro ********************************************************************/	291	/** Coro ********************************************************************/
270		292
271	#define PRIO_MAX 3	293	#define PRIO_MAX 3
272	#define PRIO_HIGH 1	294	#define PRIO_HIGH 1
…		…
276	#define PRIO_MIN -4	298	#define PRIO_MIN -4
277		299
278	/* for Coro.pm */	300	/* for Coro.pm */
279	static SV *coro_current;	301	static SV *coro_current;
280	static SV *coro_readyhook;	302	static SV *coro_readyhook;
281	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
282	static int coro_nready;
283	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
284		306
285	/** lowlevel stuff **********************************************************/	307	/** lowlevel stuff **********************************************************/
286		308
287	static SV *	309	static SV *
288	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
381	static MGVTBL coro_cv_vtbl = {	403	static MGVTBL coro_cv_vtbl = {
382	0, 0, 0, 0,	404	0, 0, 0, 0,
383	coro_cv_free	405	coro_cv_free
384	};	406	};
385		407
386	#define CORO_MAGIC(sv,type) \	408	#define CORO_MAGIC(sv, type) \
387	SvMAGIC (sv) \	409	SvMAGIC (sv) \
388	? SvMAGIC (sv)->mg_type == type \	410	? SvMAGIC (sv)->mg_type == type \
389	? SvMAGIC (sv) \	411	? SvMAGIC (sv) \
390	: mg_find (sv, type) \	412	: mg_find (sv, type) \
391	: 0	413	: 0
392		414
393	#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)
394	#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)
395		417
396	static struct coro *	418	INLINE struct coro *
397	SvSTATE_ (pTHX_ SV *coro)	419	SvSTATE_ (pTHX_ SV *coro)
398	{	420	{
399	HV *stash;	421	HV *stash;
400	MAGIC *mg;	422	MAGIC *mg;
401		423
…		…
492	CvPADLIST (cv) = (AV *)POPs;	514	CvPADLIST (cv) = (AV *)POPs;
493	}	515	}
494		516
495	PUTBACK;	517	PUTBACK;
496	}	518	}
		519
		520	slf_frame = c->slf_frame;
497	}	521	}
498		522
499	static void	523	static void
500	save_perl (pTHX_ Coro__State c)	524	save_perl (pTHX_ Coro__State c)
501	{	525	{
		526	c->slf_frame = slf_frame;
		527
502	{	528	{
503	dSP;	529	dSP;
504	I32 cxix = cxstack_ix;	530	I32 cxix = cxstack_ix;
505	PERL_CONTEXT *ccstk = cxstack;	531	PERL_CONTEXT *ccstk = cxstack;
506	PERL_SI *top_si = PL_curstackinfo;	532	PERL_SI *top_si = PL_curstackinfo;
…		…
573	#undef VAR	599	#undef VAR
574	}	600	}
575	}	601	}
576		602
577	/*	603	/*
578	* allocate various perl stacks. This is an exact copy	604	* allocate various perl stacks. This is almost an exact copy
579	* of perl.c:init_stacks, except that it uses less memory	605	* of perl.c:init_stacks, except that it uses less memory
580	* on the (sometimes correct) assumption that coroutines do	606	* on the (sometimes correct) assumption that coroutines do
581	* not usually need a lot of stackspace.	607	* not usually need a lot of stackspace.
582	*/	608	*/
583	#if CORO_PREFER_PERL_FUNCTIONS	609	#if CORO_PREFER_PERL_FUNCTIONS
…		…
626		652
627	/*	653	/*
628	* destroy the stacks, the callchain etc...	654	* destroy the stacks, the callchain etc...
629	*/	655	*/
630	static void	656	static void
631	coro_destroy_stacks (pTHX)	657	coro_destruct_stacks (pTHX)
632	{	658	{
633	while (PL_curstackinfo->si_next)	659	while (PL_curstackinfo->si_next)
634	PL_curstackinfo = PL_curstackinfo->si_next;	660	PL_curstackinfo = PL_curstackinfo->si_next;
635		661
636	while (PL_curstackinfo)	662	while (PL_curstackinfo)
…		…
785		811
786	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
787	}	813	}
788		814
789	static void	815	static void
		816	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		817	{
		818	/* kind of mega-hacky, but works */
		819	ta->next = ta->prev = (struct coro *)ta;
		820	}
		821
		822	static int
		823	slf_check_nop (pTHX_ struct CoroSLF *frame)
		824	{
		825	return 0;
		826	}
		827
		828	static void
790	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
791	{	830	{
792	/*	831	/*
793	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
794	*/	833	*/
…		…
818	PL_rs = newSVsv (GvSV (irsgv));	857	PL_rs = newSVsv (GvSV (irsgv));
819	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	858	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
820		859
821	{	860	{
822	dSP;	861	dSP;
823	LOGOP myop;	862	UNOP myop;
824		863
825	Zero (&myop, 1, LOGOP);	864	Zero (&myop, 1, UNOP);
826	myop.op_next = Nullop;	865	myop.op_next = Nullop;
827	myop.op_flags = OPf_WANT_VOID;	866	myop.op_flags = OPf_WANT_VOID;
828		867
829	PUSHMARK (SP);	868	PUSHMARK (SP);
830	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
833	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
834	SPAGAIN;	873	SPAGAIN;
835	}	874	}
836		875
837	/* 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
838	* 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.
839	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
840	* so we ENTER here for symmetry
841	*/	878	*/
842	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 */
843	}	881	}
844		882
845	static void	883	static void
846	coro_destroy (pTHX_ struct coro *coro)	884	coro_destruct (pTHX_ struct coro *coro)
847	{	885	{
848	if (!IN_DESTRUCT)	886	if (!IN_DESTRUCT)
849	{	887	{
850	/* restore all saved variables and stuff */	888	/* restore all saved variables and stuff */
851	LEAVE_SCOPE (0);	889	LEAVE_SCOPE (0);
…		…
873	SvREFCNT_dec (PL_warnhook);	911	SvREFCNT_dec (PL_warnhook);
874		912
875	SvREFCNT_dec (coro->saved_deffh);	913	SvREFCNT_dec (coro->saved_deffh);
876	SvREFCNT_dec (coro->throw);	914	SvREFCNT_dec (coro->throw);
877		915
878	coro_destroy_stacks (aTHX);	916	coro_destruct_stacks (aTHX);
879	}	917	}
880		918
881	static void	919	INLINE void
882	free_coro_mortal (pTHX)	920	free_coro_mortal (pTHX)
883	{	921	{
884	if (expect_true (coro_mortal))	922	if (expect_true (coro_mortal))
885	{	923	{
886	SvREFCNT_dec (coro_mortal);	924	SvREFCNT_dec (coro_mortal);
…		…
1010		1048
1011	TAINT_NOT;	1049	TAINT_NOT;
1012	return 0;	1050	return 0;
1013	}	1051	}
1014		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
1015	/* 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 */
1016	/* _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 */
1017	/* during execution of a perl program */	1062	/* during execution of a perl program */
		1063	/* also initialises PL_top_env */
1018	static void NOINLINE	1064	static void NOINLINE
1019	cctx_prepare (pTHX_ coro_cctx *cctx)	1065	cctx_prepare (pTHX_ coro_cctx *cctx)
1020	{	1066	{
1021	dSP;	1067	dSP;
1022	LOGOP myop;	1068	UNOP myop;
1023		1069
1024	PL_top_env = &PL_start_env;	1070	PL_top_env = &PL_start_env;
1025		1071
1026	if (cctx->flags & CC_TRACE)	1072	if (cctx->flags & CC_TRACE)
1027	PL_runops = runops_trace;	1073	PL_runops = runops_trace;
1028		1074
1029	Zero (&myop, 1, LOGOP);	1075	Zero (&myop, 1, UNOP);
1030	myop.op_next = PL_op;	1076	myop.op_next = PL_op;
1031	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1077	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1032		1078
1033	PUSHMARK (SP);	1079	PUSHMARK (SP);
1034	EXTEND (SP, 2);	1080	EXTEND (SP, 2);
1035	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1036	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1037	PUTBACK;	1083	PUTBACK;
1038	PL_op = (OP *)&myop;	1084	PL_op = (OP *)&myop;
1039	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1040	SPAGAIN;	1086	SPAGAIN;
1041	}	1087	}
1042		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
1043	/*	1110	/*
1044	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1045	*/	1112	*/
1046	static void	1113	static void
1047	cctx_run (void *arg)	1114	cctx_run (void *arg)
1048	{	1115	{
		1116	#ifdef USE_ITHREADS
		1117	# if CORO_PTHREAD
		1118	PERL_SET_CONTEXT (coro_thx);
		1119	# endif
		1120	#endif
		1121	{
1049	dTHX;	1122	dTHX;
1050		1123
1051	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1124	/* normally we would need to skip the entersub here */
1052	UNLOCK;	1125	/* not doing so will re-execute it, which is exactly what we want */
1053
1054	/* we now skip the entersub that lead to transfer() */
1055	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
1056		1127
1057	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1058	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1059		1130
		1131	/* cctx_run is the alternative tail of transfer() */
		1132	/* TODO: throwing an exception here might be deadly, VERIFY */
		1133	transfer_tail (aTHX);
		1134
1060	/* 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 */
1061	PL_restartop = PL_op;	1136	PL_restartop = PL_op;
1062	perl_run (PL_curinterp);	1137	perl_run (PL_curinterp);
1063		1138
1064	/*	1139	/*
1065	* If perl-run returns we assume exit() was being called or the coro	1140	* If perl-run returns we assume exit() was being called or the coro
1066	* fell off the end, which seems to be the only valid (non-bug)	1141	* fell off the end, which seems to be the only valid (non-bug)
1067	* reason for perl_run to return. We try to exit by jumping to the	1142	* reason for perl_run to return. We try to exit by jumping to the
1068	* bootstrap-time "top" top_env, as we cannot restore the "main"	1143	* bootstrap-time "top" top_env, as we cannot restore the "main"
1069	* coroutine as Coro has no such concept	1144	* coroutine as Coro has no such concept
1070	*/	1145	*/
1071	PL_top_env = main_top_env;	1146	PL_top_env = main_top_env;
1072	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */	1147	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1148	}
1073	}	1149	}
1074		1150
1075	static coro_cctx *	1151	static coro_cctx *
1076	cctx_new ()	1152	cctx_new ()
1077	{	1153	{
1078	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 ();
1079	void *stack_start;	1183	void *stack_start;
1080	size_t stack_size;	1184	size_t stack_size;
1081		1185
1082	++cctx_count;
1083
1084	Newz (0, cctx, 1, coro_cctx);
1085
1086	#if HAVE_MMAP	1186	#if HAVE_MMAP
1087	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1187	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1088	/* mmap supposedly does allocate-on-write for us */	1188	/* mmap supposedly does allocate-on-write for us */
1089	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);
1090		1190
1091	if (cctx->sptr != (void *)-1)	1191	if (cctx->sptr != (void *)-1)
1092	{	1192	{
1093	# if CORO_STACKGUARD	1193	#if CORO_STACKGUARD
1094	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1194	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1095	# endif	1195	#endif
1096	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1196	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1097	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1197	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1098	cctx->flags |= CC_MAPPED;	1198	cctx->flags |= CC_MAPPED;
1099	}	1199	}
1100	else	1200	else
1101	#endif	1201	#endif
1102	{	1202	{
1103	cctx->ssize = coro_stacksize * (long)sizeof (long);	1203	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1104	New (0, cctx->sptr, coro_stacksize, long);	1204	New (0, cctx->sptr, cctx_stacksize, long);
1105		1205
1106	if (!cctx->sptr)	1206	if (!cctx->sptr)
1107	{	1207	{
1108	perror ("FATAL: unable to allocate stack for coroutine");	1208	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1109	_exit (EXIT_FAILURE);	1209	_exit (EXIT_FAILURE);
1110	}	1210	}
1111		1211
1112	stack_start = cctx->sptr;	1212	stack_start = cctx->sptr;
1113	stack_size = cctx->ssize;	1213	stack_size = cctx->ssize;
1114	}	1214	}
1115		1215
1116	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
1117	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);
1118		1221
1119	return cctx;	1222	return cctx;
1120	}	1223	}
1121		1224
…		…
1124	{	1227	{
1125	if (!cctx)	1228	if (!cctx)
1126	return;	1229	return;
1127		1230
1128	--cctx_count;	1231	--cctx_count;
		1232	coro_destroy (&cctx->cctx);
1129		1233
		1234	/* coro_transfer creates new, empty cctx's */
		1235	if (cctx->sptr)
		1236	{
1130	#if CORO_USE_VALGRIND	1237	#if CORO_USE_VALGRIND
1131	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1238	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1132	#endif	1239	#endif
1133		1240
1134	#if HAVE_MMAP	1241	#if HAVE_MMAP
1135	if (cctx->flags & CC_MAPPED)	1242	if (cctx->flags & CC_MAPPED)
1136	munmap (cctx->sptr, cctx->ssize);	1243	munmap (cctx->sptr, cctx->ssize);
1137	else	1244	else
1138	#endif	1245	#endif
1139	Safefree (cctx->sptr);	1246	Safefree (cctx->sptr);
		1247	}
1140		1248
1141	Safefree (cctx);	1249	Safefree (cctx);
1142	}	1250	}
1143		1251
1144	/* wether this cctx should be destructed */	1252	/* wether this cctx should be destructed */
1145	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))	1253	#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1146		1254
1147	static coro_cctx *	1255	static coro_cctx *
1148	cctx_get (pTHX)	1256	cctx_get (pTHX)
1149	{	1257	{
1150	while (expect_true (cctx_first))	1258	while (expect_true (cctx_first))
…		…
1157	return cctx;	1265	return cctx;
1158		1266
1159	cctx_destroy (cctx);	1267	cctx_destroy (cctx);
1160	}	1268	}
1161		1269
1162	return cctx_new ();	1270	return cctx_new_run ();
1163	}	1271	}
1164		1272
1165	static void	1273	static void
1166	cctx_put (coro_cctx *cctx)	1274	cctx_put (coro_cctx *cctx)
1167	{	1275	{
		1276	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
		1277
1168	/* free another cctx if overlimit */	1278	/* free another cctx if overlimit */
1169	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1279	if (expect_false (cctx_idle >= cctx_max_idle))
1170	{	1280	{
1171	coro_cctx *first = cctx_first;	1281	coro_cctx *first = cctx_first;
1172	cctx_first = first->next;	1282	cctx_first = first->next;
1173	--cctx_idle;	1283	--cctx_idle;
1174		1284
…		…
1186	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1296	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1187	{	1297	{
1188	if (expect_true (prev != next))	1298	if (expect_true (prev != next))
1189	{	1299	{
1190	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1300	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1191	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,");
1192		1302
1193	if (expect_false (next->flags & CF_RUNNING))	1303	if (expect_false (next->flags & CF_RUNNING))
1194	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,");
1195		1305
1196	if (expect_false (next->flags & CF_DESTROYED))	1306	if (expect_false (next->flags & CF_DESTROYED))
1197	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,");
1198		1308
1199	#if !PERL_VERSION_ATLEAST (5,10,0)	1309	#if !PERL_VERSION_ATLEAST (5,10,0)
1200	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1310	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1201	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,");
1202	#endif	1312	#endif
1203	}	1313	}
1204	}	1314	}
1205		1315
1206	/* always use the TRANSFER macro */	1316	/* always use the TRANSFER macro */
1207	static void NOINLINE	1317	static void NOINLINE
1208	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1318	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1209	{	1319	{
1210	dSTACKLEVEL;	1320	dSTACKLEVEL;
1211	static volatile int has_throw;
1212		1321
1213	/* sometimes transfer is only called to set idle_sp */	1322	/* sometimes transfer is only called to set idle_sp */
1214	if (expect_false (!next))	1323	if (expect_false (!next))
1215	{	1324	{
1216	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1325	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1217	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 */
1218	}	1327	}
1219	else if (expect_true (prev != next))	1328	else if (expect_true (prev != next))
1220	{	1329	{
1221	coro_cctx *prev__cctx;	1330	coro_cctx *prev__cctx;
1222		1331
1223	if (expect_false (prev->flags & CF_NEW))	1332	if (expect_false (prev->flags & CF_NEW))
1224	{	1333	{
1225	/* create a new empty context */	1334	/* create a new empty/source context */
1226	Newz (0, prev->cctx, 1, coro_cctx);	1335	prev->cctx = cctx_new_empty ();
1227	prev->flags &= ~CF_NEW;	1336	prev->flags &= ~CF_NEW;
1228	prev->flags |= CF_RUNNING;	1337	prev->flags |= CF_RUNNING;
1229	}	1338	}
1230		1339
1231	prev->flags &= ~CF_RUNNING;	1340	prev->flags &= ~CF_RUNNING;
…		…
1246	else	1355	else
1247	load_perl (aTHX_ next);	1356	load_perl (aTHX_ next);
1248		1357
1249	prev__cctx = prev->cctx;	1358	prev__cctx = prev->cctx;
1250		1359
1251	/* possibly "free" the cctx */	1360	/* possibly untie and reuse the cctx */
1252	if (expect_true (	1361	if (expect_true (
1253	prev__cctx->idle_sp == STACKLEVEL	1362	prev__cctx->idle_sp == (void *)stacklevel
1254	&& !(prev__cctx->flags & CC_TRACE)	1363	&& !(prev__cctx->flags & CC_TRACE)
1255	&& !force_cctx	1364	&& !force_cctx
1256	))	1365	))
1257	{	1366	{
1258	/* 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 */
1259	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));
1260		1369
1261	prev->cctx = 0;	1370	prev->cctx = 0;
1262		1371
1263	/* 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 */
1264	/* 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 */
…		…
1272	++next->usecount;	1381	++next->usecount;
1273		1382
1274	if (expect_true (!next->cctx))	1383	if (expect_true (!next->cctx))
1275	next->cctx = cctx_get (aTHX);	1384	next->cctx = cctx_get (aTHX);
1276		1385
1277	has_throw = !!next->throw;	1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1387	transfer_next = next;
1278		1388
1279	if (expect_false (prev__cctx != next->cctx))	1389	if (expect_false (prev__cctx != next->cctx))
1280	{	1390	{
1281	prev__cctx->top_env = PL_top_env;	1391	prev__cctx->top_env = PL_top_env;
1282	PL_top_env = next->cctx->top_env;	1392	PL_top_env = next->cctx->top_env;
1283	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1284	}	1394	}
1285		1395
1286	free_coro_mortal (aTHX);	1396	transfer_tail (aTHX);
1287	UNLOCK;
1288
1289	if (expect_false (has_throw))
1290	{
1291	struct coro *coro = SvSTATE (coro_current);
1292
1293	if (coro->throw)
1294	{
1295	SV *exception = coro->throw;
1296	coro->throw = 0;
1297	sv_setsv (ERRSV, exception);
1298	croak (0);
1299	}
1300	}
1301	}	1397	}
1302	}	1398	}
1303
1304	struct transfer_args
1305	{
1306	struct coro *prev, *next;
1307	};
1308		1399
1309	#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))
1310	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1401	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1311		1402
1312	/** high level stuff ********************************************************/	1403	/** high level stuff ********************************************************/
…		…
1332		1423
1333	if (coro->mainstack && coro->mainstack != main_mainstack)	1424	if (coro->mainstack && coro->mainstack != main_mainstack)
1334	{	1425	{
1335	struct coro temp;	1426	struct coro temp;
1336		1427
1337	if (coro->flags & CF_RUNNING)	1428	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1338	croak ("FATAL: tried to destroy currently running coroutine");
1339		1429
1340	save_perl (aTHX_ &temp);	1430	save_perl (aTHX_ &temp);
1341	load_perl (aTHX_ coro);	1431	load_perl (aTHX_ coro);
1342		1432
1343	coro_destroy (aTHX_ coro);	1433	coro_destruct (aTHX_ coro);
1344		1434
1345	load_perl (aTHX_ &temp);	1435	load_perl (aTHX_ &temp);
1346		1436
1347	coro->slot = 0;	1437	coro->slot = 0;
1348	}	1438	}
…		…
1394	# define MGf_DUP 0	1484	# define MGf_DUP 0
1395	#endif	1485	#endif
1396	};	1486	};
1397		1487
1398	static void	1488	static void
1399	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)
1400	{	1490	{
1401	ta->prev = SvSTATE (prev_sv);	1491	ta->prev = SvSTATE (prev_sv);
1402	ta->next = SvSTATE (next_sv);	1492	ta->next = SvSTATE (next_sv);
1403	TRANSFER_CHECK (*ta);	1493	TRANSFER_CHECK (*ta);
1404	}	1494	}
1405		1495
1406	static void	1496	static void
1407	api_transfer (SV *prev_sv, SV *next_sv)	1497	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1408	{	1498	{
1409	dTHX;
1410	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1411		1500
1412	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1413	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1414	}	1503	}
1415		1504
…		…
1432		1521
1433	return 0;	1522	return 0;
1434	}	1523	}
1435		1524
1436	static int	1525	static int
1437	api_ready (SV *coro_sv)	1526	api_ready (pTHX_ SV *coro_sv)
1438	{	1527	{
1439	dTHX;
1440	struct coro *coro;	1528	struct coro *coro;
1441	SV *sv_hook;	1529	SV *sv_hook;
1442	void (*xs_hook)(void);	1530	void (*xs_hook)(void);
1443		1531
1444	if (SvROK (coro_sv))	1532	if (SvROK (coro_sv))
…		…
1482		1570
1483	return 1;	1571	return 1;
1484	}	1572	}
1485		1573
1486	static int	1574	static int
1487	api_is_ready (SV *coro_sv)	1575	api_is_ready (pTHX_ SV *coro_sv)
1488	{	1576	{
1489	dTHX;
1490	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1491	}	1578	}
1492		1579
1493	static void	1580	INLINE void
1494	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1495	{	1582	{
1496	SV *prev_sv, *next_sv;	1583	SV *prev_sv, *next_sv;
1497		1584
1498	for (;;)	1585	for (;;)
1499	{	1586	{
…		…
1524	/* cannot transfer to destroyed coros, skip and look for next */	1611	/* cannot transfer to destroyed coros, skip and look for next */
1525	if (expect_false (ta->next->flags & CF_DESTROYED))	1612	if (expect_false (ta->next->flags & CF_DESTROYED))
1526	{	1613	{
1527	UNLOCK;	1614	UNLOCK;
1528	SvREFCNT_dec (next_sv);	1615	SvREFCNT_dec (next_sv);
1529	/* coro_nready is already taken care of by destroy */	1616	/* coro_nready has already been taken care of by destroy */
1530	continue;	1617	continue;
1531	}	1618	}
1532		1619
1533	--coro_nready;	1620	--coro_nready;
1534	UNLOCK;	1621	UNLOCK;
…		…
1537		1624
1538	/* free this only after the transfer */	1625	/* free this only after the transfer */
1539	prev_sv = SvRV (coro_current);	1626	prev_sv = SvRV (coro_current);
1540	ta->prev = SvSTATE (prev_sv);	1627	ta->prev = SvSTATE (prev_sv);
1541	TRANSFER_CHECK (*ta);	1628	TRANSFER_CHECK (*ta);
1542	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));
1543	ta->next->flags &= ~CF_READY;	1630	ta->next->flags &= ~CF_READY;
1544	SvRV_set (coro_current, next_sv);	1631	SvRV_set (coro_current, next_sv);
1545		1632
1546	LOCK;	1633	LOCK;
1547	free_coro_mortal (aTHX);	1634	free_coro_mortal (aTHX);
1548	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1549	UNLOCK;	1636	UNLOCK;
1550	}	1637	}
1551		1638
1552	static void	1639	INLINE void
1553	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1554	{	1641	{
1555	api_ready (coro_current);	1642	api_ready (aTHX_ coro_current);
1556	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1557	}	1644	}
1558		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
1559	static int	1669	static int
1560	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1670	api_cede (pTHX)
1561	{	1671	{
1562	if (coro_nready)	1672	struct coro_transfer_args ta;
1563	{	1673
1564	SV *prev = SvRV (coro_current);
1565	prepare_schedule (aTHX_ ta);	1674	prepare_cede (aTHX_ &ta);
1566	api_ready (prev);	1675
		1676	if (expect_true (ta.prev != ta.next))
		1677	{
		1678	TRANSFER (ta, 1);
1567	return 1;	1679	return 1;
1568	}	1680	}
1569	else	1681	else
1570	return 0;	1682	return 0;
1571	}	1683	}
1572		1684
1573	static void
1574	api_schedule (void)
1575	{
1576	dTHX;
1577	struct transfer_args ta;
1578
1579	prepare_schedule (aTHX_ &ta);
1580	TRANSFER (ta, 1);
1581	}
1582
1583	static int	1685	static int
1584	api_cede (void)	1686	api_cede_notself (pTHX)
1585	{	1687	{
1586	dTHX;	1688	if (coro_nready)
		1689	{
1587	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1588		1691
1589	prepare_cede (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1590
1591	if (expect_true (ta.prev != ta.next))
1592	{
1593	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1594	return 1;	1694	return 1;
1595	}	1695	}
1596	else	1696	else
1597	return 0;	1697	return 0;
1598	}	1698	}
1599		1699
1600	static int	1700	static void
1601	api_cede_notself (void)
1602	{
1603	dTHX;
1604	struct transfer_args ta;
1605
1606	if (prepare_cede_notself (aTHX_ &ta))
1607	{
1608	TRANSFER (ta, 1);
1609	return 1;
1610	}
1611	else
1612	return 0;
1613	}
1614
1615	static void
1616	api_trace (SV *coro_sv, int flags)	1701	api_trace (pTHX_ SV *coro_sv, int flags)
1617	{	1702	{
1618	dTHX;
1619	struct coro *coro = SvSTATE (coro_sv);	1703	struct coro *coro = SvSTATE (coro_sv);
1620		1704
1621	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1622	{	1706	{
1623	if (!coro->cctx)	1707	if (!coro->cctx)
1624	coro->cctx = cctx_new ();	1708	coro->cctx = cctx_new_run ();
1625	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1626	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1627		1711
1628	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1712	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1629	}	1713	}
1630	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1631	{	1715	{
…		…
1636	else	1720	else
1637	coro->slot->runops = RUNOPS_DEFAULT;	1721	coro->slot->runops = RUNOPS_DEFAULT;
1638	}	1722	}
1639	}	1723	}
1640		1724
		1725	#if 0
1641	static int	1726	static int
1642	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1727	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1643	{	1728	{
1644	AV *padlist;	1729	AV *padlist;
1645	AV *av = (AV *)mg->mg_obj;	1730	AV *av = (AV *)mg->mg_obj;
…		…
1651		1736
1652	static MGVTBL coro_gensub_vtbl = {	1737	static MGVTBL coro_gensub_vtbl = {
1653	0, 0, 0, 0,	1738	0, 0, 0, 0,
1654	coro_gensub_free	1739	coro_gensub_free
1655	};	1740	};
		1741	#endif
1656		1742
1657	/*****************************************************************************/	1743	/*****************************************************************************/
1658	/* PerlIO::cede */	1744	/* PerlIO::cede */
1659		1745
1660	typedef struct	1746	typedef struct
…		…
1688	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1774	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1689	double now = nvtime ();	1775	double now = nvtime ();
1690		1776
1691	if (now >= self->next)	1777	if (now >= self->next)
1692	{	1778	{
1693	api_cede ();	1779	api_cede (aTHX);
1694	self->next = now + self->every;	1780	self->next = now + self->every;
1695	}	1781	}
1696		1782
1697	return PerlIOBuf_flush (aTHX_ f);	1783	return PerlIOBuf_flush (aTHX_ f);
1698	}	1784	}
…		…
1727	PerlIOBuf_get_ptr,	1813	PerlIOBuf_get_ptr,
1728	PerlIOBuf_get_cnt,	1814	PerlIOBuf_get_cnt,
1729	PerlIOBuf_set_ptrcnt,	1815	PerlIOBuf_set_ptrcnt,
1730	};	1816	};
1731		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 (aTHX_ ta, arg [0], arg [1]);
		1868	}
		1869
		1870	static void
		1871	slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1872	{
		1873	if (items != 2)
		1874	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1875
		1876	frame->prepare = slf_prepare_transfer;
		1877	frame->check = slf_check_nop;
		1878	frame->data = (void *)arg; /* let's hope it will stay valid */
		1879	}
		1880
		1881	static void
		1882	slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1883	{
		1884	frame->prepare = prepare_schedule;
		1885	frame->check = slf_check_nop;
		1886	}
		1887
		1888	static void
		1889	slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1890	{
		1891	frame->prepare = prepare_cede;
		1892	frame->check = slf_check_nop;
		1893	}
		1894
		1895	static void
		1896	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1897	{
		1898	frame->prepare = prepare_cede_notself;
		1899	frame->check = slf_check_nop;
		1900	}
		1901
		1902	/* we hijack an hopefully unused CV flag for our purposes */
		1903	#define CVf_SLF 0x4000
		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 (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	}
		2017
		2018	/*****************************************************************************/
		2019
		2020	static int
		2021	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2022	{
		2023	AV *av = (AV *)frame->data;
		2024	SV *count_sv = AvARRAY (av)[0];
		2025
		2026	if (SvIVX (count_sv) > 0)
		2027	{
		2028	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2029	return 0;
		2030	}
		2031	else
		2032	{
		2033	int i;
		2034	/* if we were woken up but can't down, we look through the whole */
		2035	/* waiters list and only add us if we aren't in there already */
		2036	/* this avoids some degenerate memory usage cases */
		2037
		2038	for (i = 1; i <= AvFILLp (av); ++i)
		2039	if (AvARRAY (av)[i] == SvRV (coro_current))
		2040	return 1;
		2041
		2042	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2043	return 1;
		2044	}
		2045	}
		2046
		2047	static void
		2048	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		2049	{
		2050	AV *av = (AV *)SvRV (arg [0]);
		2051
		2052	if (SvIVX (AvARRAY (av)[0]) > 0)
		2053	{
		2054	frame->data = (void *)av;
		2055	frame->prepare = prepare_nop;
		2056	}
		2057	else
		2058	{
		2059	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2060
		2061	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2062	frame->prepare = prepare_schedule;
		2063	}
		2064
		2065	frame->check = slf_check_semaphore_down;
		2066
		2067	}
1732		2068
1733	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2069	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1734		2070
1735	PROTOTYPES: DISABLE	2071	PROTOTYPES: DISABLE
1736		2072
1737	BOOT:	2073	BOOT:
1738	{	2074	{
1739	#ifdef USE_ITHREADS	2075	#ifdef USE_ITHREADS
1740	MUTEX_INIT (&coro_mutex);	2076	MUTEX_INIT (&coro_lock);
		2077	# if CORO_PTHREAD
		2078	coro_thx = PERL_GET_CONTEXT;
		2079	# endif
1741	#endif	2080	#endif
1742	BOOT_PAGESIZE;	2081	BOOT_PAGESIZE;
1743		2082
1744	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	2083	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1745	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	2084	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
…		…
1763	main_top_env = PL_top_env;	2102	main_top_env = PL_top_env;
1764		2103
1765	while (main_top_env->je_prev)	2104	while (main_top_env->je_prev)
1766	main_top_env = main_top_env->je_prev;	2105	main_top_env = main_top_env->je_prev;
1767		2106
1768	coroapi.ver = CORO_API_VERSION;	2107	coroapi.ver = CORO_API_VERSION;
1769	coroapi.rev = CORO_API_REVISION;	2108	coroapi.rev = CORO_API_REVISION;
		2109
1770	coroapi.transfer = api_transfer;	2110	coroapi.transfer = api_transfer;
		2111
		2112	coroapi.sv_state = SvSTATE_;
		2113	coroapi.execute_slf = api_execute_slf;
		2114	coroapi.prepare_nop = prepare_nop;
		2115	coroapi.prepare_schedule = prepare_schedule;
		2116	coroapi.prepare_cede = prepare_cede;
		2117	coroapi.prepare_cede_notself = prepare_cede_notself;
1771		2118
1772	{	2119	{
1773	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2120	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1774		2121
1775	if (!svp) croak ("Time::HiRes is required");	2122	if (!svp) croak ("Time::HiRes is required");
…		…
1808	av_push (coro->args, newSVsv (ST (i)));	2155	av_push (coro->args, newSVsv (ST (i)));
1809	}	2156	}
1810	OUTPUT:	2157	OUTPUT:
1811	RETVAL	2158	RETVAL
1812		2159
1813	# these not obviously related functions are all rolled into the same xs
1814	# function to increase chances that they all will call transfer with the same
1815	# stack offset
1816	void	2160	void
1817	_set_stacklevel (...)	2161	_set_stacklevel (...)
1818	ALIAS:	2162	CODE:
1819	Coro::State::transfer = 1	2163	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1820	Coro::schedule = 2
1821	Coro::cede = 3
1822	Coro::cede_notself = 4
1823	CODE:
1824	{
1825	struct transfer_args ta;
1826		2164
1827	PUTBACK;	2165	void
1828	switch (ix)	2166	transfer (...)
1829	{	2167	PROTOTYPE: $$
1830	case 0:	2168	CODE:
1831	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	2169	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1832	ta.next = 0;
1833	break;
1834
1835	case 1:
1836	if (items != 2)
1837	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1838
1839	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1840	break;
1841
1842	case 2:
1843	prepare_schedule (aTHX_ &ta);
1844	break;
1845
1846	case 3:
1847	prepare_cede (aTHX_ &ta);
1848	break;
1849
1850	case 4:
1851	if (!prepare_cede_notself (aTHX_ &ta))
1852	XSRETURN_EMPTY;
1853
1854	break;
1855	}
1856	SPAGAIN;
1857
1858	BARRIER;
1859	PUTBACK;
1860	TRANSFER (ta, 0);
1861	SPAGAIN; /* might be the sp of a different coroutine now */
1862	/* be extra careful not to ever do anything after TRANSFER */
1863	}
1864		2170
1865	bool	2171	bool
1866	_destroy (SV *coro_sv)	2172	_destroy (SV *coro_sv)
1867	CODE:	2173	CODE:
1868	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2174	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1875	CODE:	2181	CODE:
1876	_exit (code);	2182	_exit (code);
1877		2183
1878	int	2184	int
1879	cctx_stacksize (int new_stacksize = 0)	2185	cctx_stacksize (int new_stacksize = 0)
		2186	PROTOTYPE: ;$
1880	CODE:	2187	CODE:
1881	RETVAL = coro_stacksize;	2188	RETVAL = cctx_stacksize;
1882	if (new_stacksize)	2189	if (new_stacksize)
		2190	{
1883	coro_stacksize = new_stacksize;	2191	cctx_stacksize = new_stacksize;
		2192	++cctx_gen;
		2193	}
1884	OUTPUT:	2194	OUTPUT:
1885	RETVAL	2195	RETVAL
1886		2196
1887	int	2197	int
		2198	cctx_max_idle (int max_idle = 0)
		2199	PROTOTYPE: ;$
		2200	CODE:
		2201	RETVAL = cctx_max_idle;
		2202	if (max_idle > 1)
		2203	cctx_max_idle = max_idle;
		2204	OUTPUT:
		2205	RETVAL
		2206
		2207	int
1888	cctx_count ()	2208	cctx_count ()
		2209	PROTOTYPE:
1889	CODE:	2210	CODE:
1890	RETVAL = cctx_count;	2211	RETVAL = cctx_count;
1891	OUTPUT:	2212	OUTPUT:
1892	RETVAL	2213	RETVAL
1893		2214
1894	int	2215	int
1895	cctx_idle ()	2216	cctx_idle ()
		2217	PROTOTYPE:
1896	CODE:	2218	CODE:
1897	RETVAL = cctx_idle;	2219	RETVAL = cctx_idle;
1898	OUTPUT:	2220	OUTPUT:
1899	RETVAL	2221	RETVAL
1900		2222
1901	void	2223	void
1902	list ()	2224	list ()
		2225	PROTOTYPE:
1903	PPCODE:	2226	PPCODE:
1904	{	2227	{
1905	struct coro *coro;	2228	struct coro *coro;
1906	for (coro = coro_first; coro; coro = coro->next)	2229	for (coro = coro_first; coro; coro = coro->next)
1907	if (coro->hv)	2230	if (coro->hv)
…		…
1966	RETVAL = boolSV (coro->flags & ix);	2289	RETVAL = boolSV (coro->flags & ix);
1967	OUTPUT:	2290	OUTPUT:
1968	RETVAL	2291	RETVAL
1969		2292
1970	void	2293	void
		2294	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2295	PROTOTYPE: $;$
		2296	CODE:
		2297	SvREFCNT_dec (self->throw);
		2298	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2299
		2300	void
1971	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2301	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2302	PROTOTYPE: $;$
		2303	C_ARGS: aTHX_ coro, flags
1972		2304
1973	SV *	2305	SV *
1974	has_cctx (Coro::State coro)	2306	has_cctx (Coro::State coro)
1975	PROTOTYPE: $	2307	PROTOTYPE: $
1976	CODE:	2308	CODE:
…		…
1984	CODE:	2316	CODE:
1985	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2317	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1986	OUTPUT:	2318	OUTPUT:
1987	RETVAL	2319	RETVAL
1988		2320
1989	IV	2321	UV
1990	rss (Coro::State coro)	2322	rss (Coro::State coro)
1991	PROTOTYPE: $	2323	PROTOTYPE: $
1992	ALIAS:	2324	ALIAS:
1993	usecount = 1	2325	usecount = 1
1994	CODE:	2326	CODE:
…		…
2000	OUTPUT:	2332	OUTPUT:
2001	RETVAL	2333	RETVAL
2002		2334
2003	void	2335	void
2004	force_cctx ()	2336	force_cctx ()
		2337	PROTOTYPE:
2005	CODE:	2338	CODE:
2006	struct coro *coro = SvSTATE (coro_current);	2339	struct coro *coro = SvSTATE (coro_current);
2007	coro->cctx->idle_sp = 0;	2340	coro->cctx->idle_sp = 0;
2008
2009	void
2010	throw (Coro::State self, SV *throw = &PL_sv_undef)
2011	PROTOTYPE: $;$
2012	CODE:
2013	SvREFCNT_dec (self->throw);
2014	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2015		2341
2016	void	2342	void
2017	swap_defsv (Coro::State self)	2343	swap_defsv (Coro::State self)
2018	PROTOTYPE: $	2344	PROTOTYPE: $
2019	ALIAS:	2345	ALIAS:
2020	swap_defav = 1	2346	swap_defav = 1
2021	CODE:	2347	CODE:
2022	if (!self->slot)	2348	if (!self->slot)
2023	croak ("cannot swap state with coroutine that has no saved state");	2349	croak ("cannot swap state with coroutine that has no saved state,");
2024	else	2350	else
2025	{	2351	{
2026	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2352	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2027	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2353	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2028		2354
…		…
2053		2379
2054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2380	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2055	coro_ready[i] = newAV ();	2381	coro_ready[i] = newAV ();
2056		2382
2057	{	2383	{
2058	SV *sv = perl_get_sv ("Coro::API", TRUE);	2384	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2059	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2060		2385
2061	coroapi.schedule = api_schedule;	2386	coroapi.schedule = api_schedule;
2062	coroapi.cede = api_cede;	2387	coroapi.cede = api_cede;
2063	coroapi.cede_notself = api_cede_notself;	2388	coroapi.cede_notself = api_cede_notself;
2064	coroapi.ready = api_ready;	2389	coroapi.ready = api_ready;
2065	coroapi.is_ready = api_is_ready;	2390	coroapi.is_ready = api_is_ready;
2066	coroapi.nready = &coro_nready;	2391	coroapi.nready = coro_nready;
2067	coroapi.current = coro_current;	2392	coroapi.current = coro_current;
2068		2393
2069	GCoroAPI = &coroapi;	2394	GCoroAPI = &coroapi;
2070	sv_setiv (sv, (IV)&coroapi);	2395	sv_setiv (sv, (IV)&coroapi);
2071	SvREADONLY_on (sv);	2396	SvREADONLY_on (sv);
2072	}	2397	}
2073	}	2398	}
		2399
		2400	void
		2401	schedule (...)
		2402	CODE:
		2403	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
		2404
		2405	void
		2406	cede (...)
		2407	CODE:
		2408	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
		2409
		2410	void
		2411	cede_notself (...)
		2412	CODE:
		2413	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2074		2414
2075	void	2415	void
2076	_set_current (SV *current)	2416	_set_current (SV *current)
2077	PROTOTYPE: $	2417	PROTOTYPE: $
2078	CODE:	2418	CODE:
…		…
2088	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2428	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2089	UNLOCK;	2429	UNLOCK;
2090		2430
2091	int	2431	int
2092	prio (Coro::State coro, int newprio = 0)	2432	prio (Coro::State coro, int newprio = 0)
		2433	PROTOTYPE: $;$
2093	ALIAS:	2434	ALIAS:
2094	nice = 1	2435	nice = 1
2095	CODE:	2436	CODE:
2096	{	2437	{
2097	RETVAL = coro->prio;	2438	RETVAL = coro->prio;
…		…
2112		2453
2113	SV *	2454	SV *
2114	ready (SV *self)	2455	ready (SV *self)
2115	PROTOTYPE: $	2456	PROTOTYPE: $
2116	CODE:	2457	CODE:
2117	RETVAL = boolSV (api_ready (self));	2458	RETVAL = boolSV (api_ready (aTHX_ self));
2118	OUTPUT:	2459	OUTPUT:
2119	RETVAL	2460	RETVAL
2120		2461
2121	int	2462	int
2122	nready (...)	2463	nready (...)
…		…
2161	{	2502	{
2162	av_fill (defav, len - 1);	2503	av_fill (defav, len - 1);
2163	for (i = 0; i < len; ++i)	2504	for (i = 0; i < len; ++i)
2164	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2505	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2165	}	2506	}
2166
2167	SvREFCNT_dec (invoke);
2168	}	2507	}
2169		2508
2170	void	2509	void
2171	_pool_2 (SV *cb)	2510	_pool_2 (SV *cb)
2172	CODE:	2511	CODE:
…		…
2176	sv_setsv (cb, &PL_sv_undef);	2515	sv_setsv (cb, &PL_sv_undef);
2177		2516
2178	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2517	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2179	coro->saved_deffh = 0;	2518	coro->saved_deffh = 0;
2180		2519
2181	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2520	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2182	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2521	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2183	{	2522	{
2184	SV *old = PL_diehook;	2523	SV *old = PL_diehook;
2185	PL_diehook = 0;	2524	PL_diehook = 0;
2186	SvREFCNT_dec (old);	2525	SvREFCNT_dec (old);
…		…
2192	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2531	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2193		2532
2194	coro->prio = 0;	2533	coro->prio = 0;
2195		2534
2196	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2535	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2197	api_trace (coro_current, 0);	2536	api_trace (aTHX_ coro_current, 0);
2198		2537
2199	av_push (av_async_pool, newSVsv (coro_current));	2538	av_push (av_async_pool, newSVsv (coro_current));
2200	}	2539	}
2201		2540
2202	#if 0	2541	#if 0
…		…
2250		2589
2251	MODULE = Coro::State PACKAGE = Coro::AIO	2590	MODULE = Coro::State PACKAGE = Coro::AIO
2252		2591
2253	void	2592	void
2254	_get_state (SV *self)	2593	_get_state (SV *self)
		2594	PROTOTYPE: $
2255	PPCODE:	2595	PPCODE:
2256	{	2596	{
2257	AV *defav = GvAV (PL_defgv);	2597	AV *defav = GvAV (PL_defgv);
2258	AV *av = newAV ();	2598	AV *av = newAV ();
2259	int i;	2599	int i;
…		…
2274		2614
2275	av_push (av, data_sv);	2615	av_push (av, data_sv);
2276		2616
2277	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2617	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2278		2618
2279	api_ready (self);	2619	api_ready (aTHX_ self);
2280	}	2620	}
2281		2621
2282	void	2622	void
2283	_set_state (SV *state)	2623	_set_state (SV *state)
2284	PROTOTYPE: $	2624	PROTOTYPE: $
…		…
2302	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2642	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2303		2643
2304	BOOT:	2644	BOOT:
2305	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2645	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2306		2646
2307	SV *	2647	void
2308	_schedule (...)	2648	_schedule (...)
2309	PROTOTYPE: @
2310	CODE:	2649	CODE:
2311	{	2650	{
2312	static int incede;	2651	static int incede;
2313		2652
2314	api_cede_notself ();	2653	api_cede_notself (aTHX);
2315		2654
2316	++incede;	2655	++incede;
2317	while (coro_nready >= incede && api_cede ())	2656	while (coro_nready >= incede && api_cede (aTHX))
2318	;	2657	;
2319		2658
2320	sv_setsv (sv_activity, &PL_sv_undef);	2659	sv_setsv (sv_activity, &PL_sv_undef);
2321	if (coro_nready >= incede)	2660	if (coro_nready >= incede)
2322	{	2661	{
…		…
2332		2671
2333	MODULE = Coro::State PACKAGE = PerlIO::cede	2672	MODULE = Coro::State PACKAGE = PerlIO::cede
2334		2673
2335	BOOT:	2674	BOOT:
2336	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2675	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2676
		2677	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2678
		2679	SV *
		2680	new (SV *klass, SV *count_ = 0)
		2681	CODE:
		2682	{
		2683	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2684	AV *av = newAV ();
		2685	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2686	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2687	}
		2688	OUTPUT:
		2689	RETVAL
		2690
		2691	SV *
		2692	count (SV *self)
		2693	CODE:
		2694	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2695	OUTPUT:
		2696	RETVAL
		2697
		2698	void
		2699	up (SV *self, int adjust = 1)
		2700	ALIAS:
		2701	adjust = 1
		2702	CODE:
		2703	{
		2704	AV *av = (AV *)SvRV (self);
		2705	SV *count_sv = AvARRAY (av)[0];
		2706	IV count = SvIVX (count_sv);
		2707
		2708	count += ix ? adjust : 1;
		2709	SvIVX (count_sv) = count;
		2710
		2711	/* now wake up as many waiters as possible */
		2712	while (count > 0 && AvFILLp (av) >= count)
		2713	{
		2714	SV *cb;
		2715
		2716	/* swap first two elements so we can shift a waiter */
		2717	AvARRAY (av)[0] = AvARRAY (av)[1];
		2718	AvARRAY (av)[1] = count_sv;
		2719	cb = av_shift (av);
		2720
		2721	if (SvOBJECT (cb))
		2722	api_ready (aTHX_ cb);
		2723	else
		2724	croak ("callbacks not yet supported");
		2725
		2726	SvREFCNT_dec (cb);
		2727	}
		2728	}
		2729
		2730	void
		2731	down (SV *self)
		2732	CODE:
		2733	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
		2734
		2735	void
		2736	try (SV *self)
		2737	PPCODE:
		2738	{
		2739	AV *av = (AV *)SvRV (self);
		2740	SV *count_sv = AvARRAY (av)[0];
		2741	IV count = SvIVX (count_sv);
		2742
		2743	if (count > 0)
		2744	{
		2745	--count;
		2746	SvIVX (count_sv) = count;
		2747	XSRETURN_YES;
		2748	}
		2749	else
		2750	XSRETURN_NO;
		2751	}
		2752
		2753	void
		2754	waiters (SV *self)
		2755	CODE:
		2756	{
		2757	AV *av = (AV *)SvRV (self);
		2758
		2759	if (GIMME_V == G_SCALAR)
		2760	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2761	else
		2762	{
		2763	int i;
		2764	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2765	for (i = 1; i <= AvFILLp (av); ++i)
		2766	PUSHs (newSVsv (AvARRAY (av)[i]));
		2767	}
		2768	}
		2769

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