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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.252 by root, Tue Nov 4 12:08:44 2008 UTC vs.
Revision 1.275 by root, Sat Nov 15 06:26:52 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) \
…		…
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
142	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
143		143
144	#include "CoroAPI.h"	144	#include "CoroAPI.h"
145		145
146	#ifdef USE_ITHREADS	146	#ifdef USE_ITHREADS
		147
147	static perl_mutex coro_mutex;	148	static perl_mutex coro_lock;
148	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
149	# 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
150	#else	155	#else
		156
151	# define LOCK (void)0	157	# define LOCK (void)0
152	# define UNLOCK (void)0	158	# define UNLOCK (void)0
		159
153	#endif	160	#endif
		161
		162	# undef LOCK
		163	# define LOCK (void)0
		164	# undef UNLOCK
		165	# define UNLOCK (void)0
154		166
155	/* helper storage struct for Coro::AIO */	167	/* helper storage struct for Coro::AIO */
156	struct io_state	168	struct io_state
157	{	169	{
158	AV *res;	170	AV *res;
159	int errorno;	171	int errorno;
160	I32 laststype;	172	I32 laststype; /* U16 in 5.10.0 */
161	int laststatval;	173	int laststatval;
162	Stat_t statcache;	174	Stat_t statcache;
163	};	175	};
164		176
165	static double (*nvtime)(); /* so why doesn't it take void? */	177	static double (*nvtime)(); /* so why doesn't it take void? */
166		178
		179	static U32 cctx_gen;
167	static size_t coro_stacksize = CORO_STACKSIZE;	180	static size_t cctx_stacksize = CORO_STACKSIZE;
168	static struct CoroAPI coroapi;	181	static struct CoroAPI coroapi;
169	static AV *main_mainstack; /* used to differentiate between $main and others */	182	static AV *main_mainstack; /* used to differentiate between $main and others */
170	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
171	static HV *coro_state_stash, *coro_stash;	184	static HV *coro_state_stash, *coro_stash;
172	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;
173		187
174	static GV *irsgv; /* $/ */	188	static GV *irsgv; /* $/ */
175	static GV *stdoutgv; /* *STDOUT */	189	static GV *stdoutgv; /* *STDOUT */
176	static SV *rv_diehook;	190	static SV *rv_diehook;
177	static SV *rv_warnhook;	191	static SV *rv_warnhook;
…		…
196	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
197	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
198	};	212	};
199		213
200	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
201	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
202	struct coro_cctx *next;	217	struct coro_cctx *next;
203		218
204	/* the stack */	219	/* the stack */
205	void *sptr;	220	void *sptr;
206	size_t ssize;	221	size_t ssize;
…		…
209	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	224	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210	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 */
211	JMPENV *top_env;	226	JMPENV *top_env;
212	coro_context cctx;	227	coro_context cctx;
213		228
		229	U32 gen;
214	#if CORO_USE_VALGRIND	230	#if CORO_USE_VALGRIND
215	int valgrind_id;	231	int valgrind_id;
216	#endif	232	#endif
217	unsigned char flags;	233	unsigned char flags;
218	} coro_cctx;	234	} coro_cctx;
…		…
223	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
224	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225	};	241	};
226		242
227	/* 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 */
228	typedef struct {	244	typedef struct
		245	{
229	SV *defsv;	246	SV *defsv;
230	AV *defav;	247	AV *defav;
231	SV *errsv;	248	SV *errsv;
232	SV *irsgv;	249	SV *irsgv;
233	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
237		254
238	#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))
239		256
240	/* this is a structure representing a perl-level coroutine */	257	/* this is a structure representing a perl-level coroutine */
241	struct coro {	258	struct coro {
242	/* the c coroutine allocated to this perl coroutine, if any */	259	/* the C coroutine allocated to this perl coroutine, if any */
243	coro_cctx *cctx;	260	coro_cctx *cctx;
244		261
245	/* process data */	262	/* process data */
		263	struct CoroSLF slf_frame; /* saved slf frame */
246	AV *mainstack;	264	AV *mainstack;
247	perl_slots *slot; /* basically the saved sp */	265	perl_slots *slot; /* basically the saved sp */
248		266
249	AV *args; /* data associated with this coroutine (initial args) */	267	AV *args; /* data associated with this coroutine (initial args) */
250	int refcnt; /* coroutines are refcounted, yes */	268	int refcnt; /* coroutines are refcounted, yes */
…		…
265	struct coro *next, *prev;	283	struct coro *next, *prev;
266	};	284	};
267		285
268	typedef struct coro *Coro__State;	286	typedef struct coro *Coro__State;
269	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 */
270		290
271	/** Coro ********************************************************************/	291	/** Coro ********************************************************************/
272		292
273	#define PRIO_MAX 3	293	#define PRIO_MAX 3
274	#define PRIO_HIGH 1	294	#define PRIO_HIGH 1
…		…
278	#define PRIO_MIN -4	298	#define PRIO_MIN -4
279		299
280	/* for Coro.pm */	300	/* for Coro.pm */
281	static SV *coro_current;	301	static SV *coro_current;
282	static SV *coro_readyhook;	302	static SV *coro_readyhook;
283	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
284	static int coro_nready;
285	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
286		306
287	/** lowlevel stuff **********************************************************/	307	/** lowlevel stuff **********************************************************/
288		308
289	static SV *	309	static SV *
290	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
383	static MGVTBL coro_cv_vtbl = {	403	static MGVTBL coro_cv_vtbl = {
384	0, 0, 0, 0,	404	0, 0, 0, 0,
385	coro_cv_free	405	coro_cv_free
386	};	406	};
387		407
388	#define CORO_MAGIC(sv,type) \	408	#define CORO_MAGIC(sv, type) \
389	SvMAGIC (sv) \	409	SvMAGIC (sv) \
390	? SvMAGIC (sv)->mg_type == type \	410	? SvMAGIC (sv)->mg_type == type \
391	? SvMAGIC (sv) \	411	? SvMAGIC (sv) \
392	: mg_find (sv, type) \	412	: mg_find (sv, type) \
393	: 0	413	: 0
394		414
395	#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)
396	#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)
397		417
398	static struct coro *	418	INLINE struct coro *
399	SvSTATE_ (pTHX_ SV *coro)	419	SvSTATE_ (pTHX_ SV *coro)
400	{	420	{
401	HV *stash;	421	HV *stash;
402	MAGIC *mg;	422	MAGIC *mg;
403		423
…		…
494	CvPADLIST (cv) = (AV *)POPs;	514	CvPADLIST (cv) = (AV *)POPs;
495	}	515	}
496		516
497	PUTBACK;	517	PUTBACK;
498	}	518	}
		519
		520	slf_frame = c->slf_frame;
499	}	521	}
500		522
501	static void	523	static void
502	save_perl (pTHX_ Coro__State c)	524	save_perl (pTHX_ Coro__State c)
503	{	525	{
		526	c->slf_frame = slf_frame;
		527
504	{	528	{
505	dSP;	529	dSP;
506	I32 cxix = cxstack_ix;	530	I32 cxix = cxstack_ix;
507	PERL_CONTEXT *ccstk = cxstack;	531	PERL_CONTEXT *ccstk = cxstack;
508	PERL_SI *top_si = PL_curstackinfo;	532	PERL_SI *top_si = PL_curstackinfo;
…		…
575	#undef VAR	599	#undef VAR
576	}	600	}
577	}	601	}
578		602
579	/*	603	/*
580	* allocate various perl stacks. This is an exact copy	604	* allocate various perl stacks. This is almost an exact copy
581	* of perl.c:init_stacks, except that it uses less memory	605	* of perl.c:init_stacks, except that it uses less memory
582	* on the (sometimes correct) assumption that coroutines do	606	* on the (sometimes correct) assumption that coroutines do
583	* not usually need a lot of stackspace.	607	* not usually need a lot of stackspace.
584	*/	608	*/
585	#if CORO_PREFER_PERL_FUNCTIONS	609	#if CORO_PREFER_PERL_FUNCTIONS
…		…
628		652
629	/*	653	/*
630	* destroy the stacks, the callchain etc...	654	* destroy the stacks, the callchain etc...
631	*/	655	*/
632	static void	656	static void
633	coro_destroy_stacks (pTHX)	657	coro_destruct_stacks (pTHX)
634	{	658	{
635	while (PL_curstackinfo->si_next)	659	while (PL_curstackinfo->si_next)
636	PL_curstackinfo = PL_curstackinfo->si_next;	660	PL_curstackinfo = PL_curstackinfo->si_next;
637		661
638	while (PL_curstackinfo)	662	while (PL_curstackinfo)
…		…
787		811
788	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
789	}	813	}
790		814
791	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
792	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
793	{	830	{
794	/*	831	/*
795	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
796	*/	833	*/
…		…
820	PL_rs = newSVsv (GvSV (irsgv));	857	PL_rs = newSVsv (GvSV (irsgv));
821	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	858	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
822		859
823	{	860	{
824	dSP;	861	dSP;
825	LOGOP myop;	862	UNOP myop;
826		863
827	Zero (&myop, 1, LOGOP);	864	Zero (&myop, 1, UNOP);
828	myop.op_next = Nullop;	865	myop.op_next = Nullop;
829	myop.op_flags = OPf_WANT_VOID;	866	myop.op_flags = OPf_WANT_VOID;
830		867
831	PUSHMARK (SP);	868	PUSHMARK (SP);
832	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
835	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
836	SPAGAIN;	873	SPAGAIN;
837	}	874	}
838		875
839	/* 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
840	* 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.
841	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
842	* so we ENTER here for symmetry
843	*/	878	*/
844	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 */
845	}	881	}
846		882
847	static void	883	static void
848	coro_destroy (pTHX_ struct coro *coro)	884	coro_destruct (pTHX_ struct coro *coro)
849	{	885	{
850	if (!IN_DESTRUCT)	886	if (!IN_DESTRUCT)
851	{	887	{
852	/* restore all saved variables and stuff */	888	/* restore all saved variables and stuff */
853	LEAVE_SCOPE (0);	889	LEAVE_SCOPE (0);
…		…
875	SvREFCNT_dec (PL_warnhook);	911	SvREFCNT_dec (PL_warnhook);
876		912
877	SvREFCNT_dec (coro->saved_deffh);	913	SvREFCNT_dec (coro->saved_deffh);
878	SvREFCNT_dec (coro->throw);	914	SvREFCNT_dec (coro->throw);
879		915
880	coro_destroy_stacks (aTHX);	916	coro_destruct_stacks (aTHX);
881	}	917	}
882		918
883	static void	919	INLINE void
884	free_coro_mortal (pTHX)	920	free_coro_mortal (pTHX)
885	{	921	{
886	if (expect_true (coro_mortal))	922	if (expect_true (coro_mortal))
887	{	923	{
888	SvREFCNT_dec (coro_mortal);	924	SvREFCNT_dec (coro_mortal);
…		…
1012		1048
1013	TAINT_NOT;	1049	TAINT_NOT;
1014	return 0;	1050	return 0;
1015	}	1051	}
1016		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
1017	/* 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 */
1018	/* _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 */
1019	/* during execution of a perl program */	1062	/* during execution of a perl program */
		1063	/* also initialises PL_top_env */
1020	static void NOINLINE	1064	static void NOINLINE
1021	cctx_prepare (pTHX_ coro_cctx *cctx)	1065	cctx_prepare (pTHX_ coro_cctx *cctx)
1022	{	1066	{
1023	dSP;	1067	dSP;
1024	LOGOP myop;	1068	UNOP myop;
1025		1069
1026	PL_top_env = &PL_start_env;	1070	PL_top_env = &PL_start_env;
1027		1071
1028	if (cctx->flags & CC_TRACE)	1072	if (cctx->flags & CC_TRACE)
1029	PL_runops = runops_trace;	1073	PL_runops = runops_trace;
1030		1074
1031	Zero (&myop, 1, LOGOP);	1075	Zero (&myop, 1, UNOP);
1032	myop.op_next = PL_op;	1076	myop.op_next = PL_op;
1033	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1077	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1034		1078
1035	PUSHMARK (SP);	1079	PUSHMARK (SP);
1036	EXTEND (SP, 2);	1080	EXTEND (SP, 2);
1037	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1038	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1039	PUTBACK;	1083	PUTBACK;
1040	PL_op = (OP *)&myop;	1084	PL_op = (OP *)&myop;
1041	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1042	SPAGAIN;	1086	SPAGAIN;
1043	}	1087	}
1044		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
1045	/*	1110	/*
1046	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1047	*/	1112	*/
1048	static void	1113	static void
1049	cctx_run (void *arg)	1114	cctx_run (void *arg)
1050	{	1115	{
		1116	#ifdef USE_ITHREADS
		1117	# if CORO_PTHREAD
		1118	PERL_SET_CONTEXT (coro_thx);
		1119	# endif
		1120	#endif
		1121	{
1051	dTHX;	1122	dTHX;
1052		1123
1053	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1124	/* normally we would need to skip the entersub here */
1054	UNLOCK;	1125	/* not doing so will re-execute it, which is exactly what we want */
1055
1056	/* we now skip the entersub that lead to transfer() */
1057	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
1058		1127
1059	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1060	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1061		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
1062	/* 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 */
1063	PL_restartop = PL_op;	1136	PL_restartop = PL_op;
1064	perl_run (PL_curinterp);	1137	perl_run (PL_curinterp);
1065		1138
1066	/*	1139	/*
1067	* 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
1068	* 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)
1069	* 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
1070	* bootstrap-time "top" top_env, as we cannot restore the "main"	1143	* bootstrap-time "top" top_env, as we cannot restore the "main"
1071	* coroutine as Coro has no such concept	1144	* coroutine as Coro has no such concept
1072	*/	1145	*/
1073	PL_top_env = main_top_env;	1146	PL_top_env = main_top_env;
1074	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	}
1075	}	1149	}
1076		1150
1077	static coro_cctx *	1151	static coro_cctx *
1078	cctx_new ()	1152	cctx_new ()
1079	{	1153	{
1080	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 ();
1081	void *stack_start;	1183	void *stack_start;
1082	size_t stack_size;	1184	size_t stack_size;
1083		1185
1084	++cctx_count;
1085
1086	Newz (0, cctx, 1, coro_cctx);
1087
1088	#if HAVE_MMAP	1186	#if HAVE_MMAP
1089	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;
1090	/* mmap supposedly does allocate-on-write for us */	1188	/* mmap supposedly does allocate-on-write for us */
1091	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);
1092		1190
1093	if (cctx->sptr != (void *)-1)	1191	if (cctx->sptr != (void *)-1)
1094	{	1192	{
1095	# if CORO_STACKGUARD	1193	#if CORO_STACKGUARD
1096	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1194	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1097	# endif	1195	#endif
1098	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1196	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1099	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1197	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1100	cctx->flags |= CC_MAPPED;	1198	cctx->flags |= CC_MAPPED;
1101	}	1199	}
1102	else	1200	else
1103	#endif	1201	#endif
1104	{	1202	{
1105	cctx->ssize = coro_stacksize * (long)sizeof (long);	1203	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1106	New (0, cctx->sptr, coro_stacksize, long);	1204	New (0, cctx->sptr, cctx_stacksize, long);
1107		1205
1108	if (!cctx->sptr)	1206	if (!cctx->sptr)
1109	{	1207	{
1110	perror ("FATAL: unable to allocate stack for coroutine");	1208	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1111	_exit (EXIT_FAILURE);	1209	_exit (EXIT_FAILURE);
1112	}	1210	}
1113		1211
1114	stack_start = cctx->sptr;	1212	stack_start = cctx->sptr;
1115	stack_size = cctx->ssize;	1213	stack_size = cctx->ssize;
1116	}	1214	}
1117		1215
1118	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
1119	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);
1120		1221
1121	return cctx;	1222	return cctx;
1122	}	1223	}
1123		1224
…		…
1126	{	1227	{
1127	if (!cctx)	1228	if (!cctx)
1128	return;	1229	return;
1129		1230
1130	--cctx_count;	1231	--cctx_count;
		1232	coro_destroy (&cctx->cctx);
1131		1233
		1234	/* coro_transfer creates new, empty cctx's */
		1235	if (cctx->sptr)
		1236	{
1132	#if CORO_USE_VALGRIND	1237	#if CORO_USE_VALGRIND
1133	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1238	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1134	#endif	1239	#endif
1135		1240
1136	#if HAVE_MMAP	1241	#if HAVE_MMAP
1137	if (cctx->flags & CC_MAPPED)	1242	if (cctx->flags & CC_MAPPED)
1138	munmap (cctx->sptr, cctx->ssize);	1243	munmap (cctx->sptr, cctx->ssize);
1139	else	1244	else
1140	#endif	1245	#endif
1141	Safefree (cctx->sptr);	1246	Safefree (cctx->sptr);
		1247	}
1142		1248
1143	Safefree (cctx);	1249	Safefree (cctx);
1144	}	1250	}
1145		1251
1146	/* wether this cctx should be destructed */	1252	/* wether this cctx should be destructed */
1147	#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))
1148		1254
1149	static coro_cctx *	1255	static coro_cctx *
1150	cctx_get (pTHX)	1256	cctx_get (pTHX)
1151	{	1257	{
1152	while (expect_true (cctx_first))	1258	while (expect_true (cctx_first))
…		…
1159	return cctx;	1265	return cctx;
1160		1266
1161	cctx_destroy (cctx);	1267	cctx_destroy (cctx);
1162	}	1268	}
1163		1269
1164	return cctx_new ();	1270	return cctx_new_run ();
1165	}	1271	}
1166		1272
1167	static void	1273	static void
1168	cctx_put (coro_cctx *cctx)	1274	cctx_put (coro_cctx *cctx)
1169	{	1275	{
		1276	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
		1277
1170	/* free another cctx if overlimit */	1278	/* free another cctx if overlimit */
1171	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1279	if (expect_false (cctx_idle >= cctx_max_idle))
1172	{	1280	{
1173	coro_cctx *first = cctx_first;	1281	coro_cctx *first = cctx_first;
1174	cctx_first = first->next;	1282	cctx_first = first->next;
1175	--cctx_idle;	1283	--cctx_idle;
1176		1284
…		…
1188	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1296	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1189	{	1297	{
1190	if (expect_true (prev != next))	1298	if (expect_true (prev != next))
1191	{	1299	{
1192	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1300	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1193	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,");
1194		1302
1195	if (expect_false (next->flags & CF_RUNNING))	1303	if (expect_false (next->flags & CF_RUNNING))
1196	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,");
1197		1305
1198	if (expect_false (next->flags & CF_DESTROYED))	1306	if (expect_false (next->flags & CF_DESTROYED))
1199	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,");
1200		1308
1201	#if !PERL_VERSION_ATLEAST (5,10,0)	1309	#if !PERL_VERSION_ATLEAST (5,10,0)
1202	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1310	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1203	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,");
1204	#endif	1312	#endif
1205	}	1313	}
1206	}	1314	}
1207		1315
1208	/* always use the TRANSFER macro */	1316	/* always use the TRANSFER macro */
…		…
1212	dSTACKLEVEL;	1320	dSTACKLEVEL;
1213		1321
1214	/* sometimes transfer is only called to set idle_sp */	1322	/* sometimes transfer is only called to set idle_sp */
1215	if (expect_false (!next))	1323	if (expect_false (!next))
1216	{	1324	{
1217	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1325	((coro_cctx *)prev)->idle_sp = stacklevel;
1218	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 */
1219	}	1327	}
1220	else if (expect_true (prev != next))	1328	else if (expect_true (prev != next))
1221	{	1329	{
1222	static volatile int has_throw;
1223	coro_cctx *prev__cctx;	1330	coro_cctx *prev__cctx;
1224		1331
1225	if (expect_false (prev->flags & CF_NEW))	1332	if (expect_false (prev->flags & CF_NEW))
1226	{	1333	{
1227	/* create a new empty context */	1334	/* create a new empty/source context */
1228	Newz (0, prev->cctx, 1, coro_cctx);	1335	prev->cctx = cctx_new_empty ();
1229	prev->flags &= ~CF_NEW;	1336	prev->flags &= ~CF_NEW;
1230	prev->flags |= CF_RUNNING;	1337	prev->flags |= CF_RUNNING;
1231	}	1338	}
1232		1339
1233	prev->flags &= ~CF_RUNNING;	1340	prev->flags &= ~CF_RUNNING;
…		…
1248	else	1355	else
1249	load_perl (aTHX_ next);	1356	load_perl (aTHX_ next);
1250		1357
1251	prev__cctx = prev->cctx;	1358	prev__cctx = prev->cctx;
1252		1359
1253	/* possibly "free" the cctx */	1360	/* possibly untie and reuse the cctx */
1254	if (expect_true (	1361	if (expect_true (
1255	prev__cctx->idle_sp == STACKLEVEL	1362	prev__cctx->idle_sp == stacklevel
1256	&& !(prev__cctx->flags & CC_TRACE)	1363	&& !(prev__cctx->flags & CC_TRACE)
1257	&& !force_cctx	1364	&& !force_cctx
1258	))	1365	))
1259	{	1366	{
1260	/* 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 */
1261	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));
1262		1369
1263	prev->cctx = 0;	1370	prev->cctx = 0;
1264		1371
1265	/* 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 */
1266	/* 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 */
…		…
1274	++next->usecount;	1381	++next->usecount;
1275		1382
1276	if (expect_true (!next->cctx))	1383	if (expect_true (!next->cctx))
1277	next->cctx = cctx_get (aTHX);	1384	next->cctx = cctx_get (aTHX);
1278		1385
1279	has_throw = !!next->throw;	1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1387	transfer_next = next;
1280		1388
1281	if (expect_false (prev__cctx != next->cctx))	1389	if (expect_false (prev__cctx != next->cctx))
1282	{	1390	{
1283	prev__cctx->top_env = PL_top_env;	1391	prev__cctx->top_env = PL_top_env;
1284	PL_top_env = next->cctx->top_env;	1392	PL_top_env = next->cctx->top_env;
1285	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1286	}	1394	}
1287		1395
1288	free_coro_mortal (aTHX);	1396	transfer_tail (aTHX);
1289	UNLOCK;
1290
1291	if (expect_false (has_throw))
1292	{
1293	struct coro *coro = SvSTATE (coro_current);
1294
1295	if (coro->throw)
1296	{
1297	SV *exception = coro->throw;
1298	coro->throw = 0;
1299	sv_setsv (ERRSV, exception);
1300	croak (0);
1301	}
1302	}
1303	}	1397	}
1304	}	1398	}
1305
1306	struct transfer_args
1307	{
1308	struct coro *prev, *next;
1309	};
1310		1399
1311	#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))
1312	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1401	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1313		1402
1314	/** high level stuff ********************************************************/	1403	/** high level stuff ********************************************************/
…		…
1334		1423
1335	if (coro->mainstack && coro->mainstack != main_mainstack)	1424	if (coro->mainstack && coro->mainstack != main_mainstack)
1336	{	1425	{
1337	struct coro temp;	1426	struct coro temp;
1338		1427
1339	if (coro->flags & CF_RUNNING)	1428	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1340	croak ("FATAL: tried to destroy currently running coroutine");
1341		1429
1342	save_perl (aTHX_ &temp);	1430	save_perl (aTHX_ &temp);
1343	load_perl (aTHX_ coro);	1431	load_perl (aTHX_ coro);
1344		1432
1345	coro_destroy (aTHX_ coro);	1433	coro_destruct (aTHX_ coro);
1346		1434
1347	load_perl (aTHX_ &temp);	1435	load_perl (aTHX_ &temp);
1348		1436
1349	coro->slot = 0;	1437	coro->slot = 0;
1350	}	1438	}
…		…
1396	# define MGf_DUP 0	1484	# define MGf_DUP 0
1397	#endif	1485	#endif
1398	};	1486	};
1399		1487
1400	static void	1488	static void
1401	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)
1402	{	1490	{
1403	ta->prev = SvSTATE (prev_sv);	1491	ta->prev = SvSTATE (prev_sv);
1404	ta->next = SvSTATE (next_sv);	1492	ta->next = SvSTATE (next_sv);
1405	TRANSFER_CHECK (*ta);	1493	TRANSFER_CHECK (*ta);
1406	}	1494	}
1407		1495
1408	static void	1496	static void
1409	api_transfer (SV *prev_sv, SV *next_sv)	1497	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1410	{	1498	{
1411	dTHX;
1412	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1413		1500
1414	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1415	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1416	}	1503	}
1417		1504
…		…
1434		1521
1435	return 0;	1522	return 0;
1436	}	1523	}
1437		1524
1438	static int	1525	static int
1439	api_ready (SV *coro_sv)	1526	api_ready (pTHX_ SV *coro_sv)
1440	{	1527	{
1441	dTHX;
1442	struct coro *coro;	1528	struct coro *coro;
1443	SV *sv_hook;	1529	SV *sv_hook;
1444	void (*xs_hook)(void);	1530	void (*xs_hook)(void);
1445		1531
1446	if (SvROK (coro_sv))	1532	if (SvROK (coro_sv))
…		…
1484		1570
1485	return 1;	1571	return 1;
1486	}	1572	}
1487		1573
1488	static int	1574	static int
1489	api_is_ready (SV *coro_sv)	1575	api_is_ready (pTHX_ SV *coro_sv)
1490	{	1576	{
1491	dTHX;
1492	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1493	}	1578	}
1494		1579
1495	static void	1580	INLINE void
1496	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1497	{	1582	{
1498	SV *prev_sv, *next_sv;	1583	SV *prev_sv, *next_sv;
1499		1584
1500	for (;;)	1585	for (;;)
1501	{	1586	{
…		…
1526	/* cannot transfer to destroyed coros, skip and look for next */	1611	/* cannot transfer to destroyed coros, skip and look for next */
1527	if (expect_false (ta->next->flags & CF_DESTROYED))	1612	if (expect_false (ta->next->flags & CF_DESTROYED))
1528	{	1613	{
1529	UNLOCK;	1614	UNLOCK;
1530	SvREFCNT_dec (next_sv);	1615	SvREFCNT_dec (next_sv);
1531	/* coro_nready is already taken care of by destroy */	1616	/* coro_nready has already been taken care of by destroy */
1532	continue;	1617	continue;
1533	}	1618	}
1534		1619
1535	--coro_nready;	1620	--coro_nready;
1536	UNLOCK;	1621	UNLOCK;
…		…
1539		1624
1540	/* free this only after the transfer */	1625	/* free this only after the transfer */
1541	prev_sv = SvRV (coro_current);	1626	prev_sv = SvRV (coro_current);
1542	ta->prev = SvSTATE (prev_sv);	1627	ta->prev = SvSTATE (prev_sv);
1543	TRANSFER_CHECK (*ta);	1628	TRANSFER_CHECK (*ta);
1544	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));
1545	ta->next->flags &= ~CF_READY;	1630	ta->next->flags &= ~CF_READY;
1546	SvRV_set (coro_current, next_sv);	1631	SvRV_set (coro_current, next_sv);
1547		1632
1548	LOCK;	1633	LOCK;
1549	free_coro_mortal (aTHX);	1634	free_coro_mortal (aTHX);
1550	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1551	UNLOCK;	1636	UNLOCK;
1552	}	1637	}
1553		1638
1554	static void	1639	INLINE void
1555	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1556	{	1641	{
1557	api_ready (coro_current);	1642	api_ready (aTHX_ coro_current);
1558	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1559	}	1644	}
1560		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
1561	static int	1669	static int
1562	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1670	api_cede (pTHX)
1563	{	1671	{
1564	if (coro_nready)	1672	struct coro_transfer_args ta;
1565	{	1673
1566	SV *prev = SvRV (coro_current);
1567	prepare_schedule (aTHX_ ta);	1674	prepare_cede (aTHX_ &ta);
1568	api_ready (prev);	1675
		1676	if (expect_true (ta.prev != ta.next))
		1677	{
		1678	TRANSFER (ta, 1);
1569	return 1;	1679	return 1;
1570	}	1680	}
1571	else	1681	else
1572	return 0;	1682	return 0;
1573	}	1683	}
1574		1684
1575	static void
1576	api_schedule (void)
1577	{
1578	dTHX;
1579	struct transfer_args ta;
1580
1581	prepare_schedule (aTHX_ &ta);
1582	TRANSFER (ta, 1);
1583	}
1584
1585	static int	1685	static int
1586	api_cede (void)	1686	api_cede_notself (pTHX)
1587	{	1687	{
1588	dTHX;	1688	if (coro_nready)
		1689	{
1589	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1590		1691
1591	prepare_cede (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1592
1593	if (expect_true (ta.prev != ta.next))
1594	{
1595	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1596	return 1;	1694	return 1;
1597	}	1695	}
1598	else	1696	else
1599	return 0;	1697	return 0;
1600	}	1698	}
1601		1699
1602	static int	1700	static void
1603	api_cede_notself (void)
1604	{
1605	dTHX;
1606	struct transfer_args ta;
1607
1608	if (prepare_cede_notself (aTHX_ &ta))
1609	{
1610	TRANSFER (ta, 1);
1611	return 1;
1612	}
1613	else
1614	return 0;
1615	}
1616
1617	static void
1618	api_trace (SV *coro_sv, int flags)	1701	api_trace (pTHX_ SV *coro_sv, int flags)
1619	{	1702	{
1620	dTHX;
1621	struct coro *coro = SvSTATE (coro_sv);	1703	struct coro *coro = SvSTATE (coro_sv);
1622		1704
1623	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1624	{	1706	{
1625	if (!coro->cctx)	1707	if (!coro->cctx)
1626	coro->cctx = cctx_new ();	1708	coro->cctx = cctx_new_run ();
1627	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1628	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1629		1711
1630	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1712	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1631	}	1713	}
1632	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1633	{	1715	{
…		…
1638	else	1720	else
1639	coro->slot->runops = RUNOPS_DEFAULT;	1721	coro->slot->runops = RUNOPS_DEFAULT;
1640	}	1722	}
1641	}	1723	}
1642		1724
		1725	#if 0
1643	static int	1726	static int
1644	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1727	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1645	{	1728	{
1646	AV *padlist;	1729	AV *padlist;
1647	AV *av = (AV *)mg->mg_obj;	1730	AV *av = (AV *)mg->mg_obj;
…		…
1653		1736
1654	static MGVTBL coro_gensub_vtbl = {	1737	static MGVTBL coro_gensub_vtbl = {
1655	0, 0, 0, 0,	1738	0, 0, 0, 0,
1656	coro_gensub_free	1739	coro_gensub_free
1657	};	1740	};
		1741	#endif
1658		1742
1659	/*****************************************************************************/	1743	/*****************************************************************************/
1660	/* PerlIO::cede */	1744	/* PerlIO::cede */
1661		1745
1662	typedef struct	1746	typedef struct
…		…
1690	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1774	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1691	double now = nvtime ();	1775	double now = nvtime ();
1692		1776
1693	if (now >= self->next)	1777	if (now >= self->next)
1694	{	1778	{
1695	api_cede ();	1779	api_cede (aTHX);
1696	self->next = now + self->every;	1780	self->next = now + self->every;
1697	}	1781	}
1698		1782
1699	return PerlIOBuf_flush (aTHX_ f);	1783	return PerlIOBuf_flush (aTHX_ f);
1700	}	1784	}
…		…
1729	PerlIOBuf_get_ptr,	1813	PerlIOBuf_get_ptr,
1730	PerlIOBuf_get_cnt,	1814	PerlIOBuf_get_cnt,
1731	PerlIOBuf_set_ptrcnt,	1815	PerlIOBuf_set_ptrcnt,
1732	};	1816	};
1733		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 (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	}
1734		2068
1735	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2069	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1736		2070
1737	PROTOTYPES: DISABLE	2071	PROTOTYPES: DISABLE
1738		2072
1739	BOOT:	2073	BOOT:
1740	{	2074	{
1741	#ifdef USE_ITHREADS	2075	#ifdef USE_ITHREADS
1742	MUTEX_INIT (&coro_mutex);	2076	MUTEX_INIT (&coro_lock);
		2077	# if CORO_PTHREAD
		2078	coro_thx = PERL_GET_CONTEXT;
		2079	# endif
1743	#endif	2080	#endif
1744	BOOT_PAGESIZE;	2081	BOOT_PAGESIZE;
1745		2082
1746	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	2083	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1747	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	2084	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
…		…
1765	main_top_env = PL_top_env;	2102	main_top_env = PL_top_env;
1766		2103
1767	while (main_top_env->je_prev)	2104	while (main_top_env->je_prev)
1768	main_top_env = main_top_env->je_prev;	2105	main_top_env = main_top_env->je_prev;
1769		2106
1770	coroapi.ver = CORO_API_VERSION;	2107	coroapi.ver = CORO_API_VERSION;
1771	coroapi.rev = CORO_API_REVISION;	2108	coroapi.rev = CORO_API_REVISION;
		2109
1772	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;
1773		2118
1774	{	2119	{
1775	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2120	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1776		2121
1777	if (!svp) croak ("Time::HiRes is required");	2122	if (!svp) croak ("Time::HiRes is required");
…		…
1810	av_push (coro->args, newSVsv (ST (i)));	2155	av_push (coro->args, newSVsv (ST (i)));
1811	}	2156	}
1812	OUTPUT:	2157	OUTPUT:
1813	RETVAL	2158	RETVAL
1814		2159
1815	# these not obviously related functions are all rolled into the same xs
1816	# function to increase chances that they all will call transfer with the same
1817	# stack offset
1818	void	2160	void
1819	_set_stacklevel (...)	2161	_set_stacklevel (...)
1820	ALIAS:	2162	CODE:
1821	Coro::State::transfer = 1	2163	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1822	Coro::schedule = 2
1823	Coro::cede = 3
1824	Coro::cede_notself = 4
1825	CODE:
1826	{
1827	struct transfer_args ta;
1828		2164
1829	PUTBACK;	2165	void
1830	switch (ix)	2166	transfer (...)
1831	{	2167	CODE:
1832	case 0:	2168	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1833	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1834	ta.next = 0;
1835	break;
1836
1837	case 1:
1838	if (items != 2)
1839	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1840
1841	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1842	break;
1843
1844	case 2:
1845	prepare_schedule (aTHX_ &ta);
1846	break;
1847
1848	case 3:
1849	prepare_cede (aTHX_ &ta);
1850	break;
1851
1852	case 4:
1853	if (!prepare_cede_notself (aTHX_ &ta))
1854	XSRETURN_EMPTY;
1855
1856	break;
1857	}
1858	SPAGAIN;
1859
1860	BARRIER;
1861	PUTBACK;
1862	TRANSFER (ta, 0);
1863	SPAGAIN; /* might be the sp of a different coroutine now */
1864	/* be extra careful not to ever do anything after TRANSFER */
1865	}
1866		2169
1867	bool	2170	bool
1868	_destroy (SV *coro_sv)	2171	_destroy (SV *coro_sv)
1869	CODE:	2172	CODE:
1870	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2173	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1877	CODE:	2180	CODE:
1878	_exit (code);	2181	_exit (code);
1879		2182
1880	int	2183	int
1881	cctx_stacksize (int new_stacksize = 0)	2184	cctx_stacksize (int new_stacksize = 0)
		2185	PROTOTYPE: ;$
1882	CODE:	2186	CODE:
1883	RETVAL = coro_stacksize;	2187	RETVAL = cctx_stacksize;
1884	if (new_stacksize)	2188	if (new_stacksize)
		2189	{
1885	coro_stacksize = new_stacksize;	2190	cctx_stacksize = new_stacksize;
		2191	++cctx_gen;
		2192	}
1886	OUTPUT:	2193	OUTPUT:
1887	RETVAL	2194	RETVAL
1888		2195
1889	int	2196	int
		2197	cctx_max_idle (int max_idle = 0)
		2198	PROTOTYPE: ;$
		2199	CODE:
		2200	RETVAL = cctx_max_idle;
		2201	if (max_idle > 1)
		2202	cctx_max_idle = max_idle;
		2203	OUTPUT:
		2204	RETVAL
		2205
		2206	int
1890	cctx_count ()	2207	cctx_count ()
		2208	PROTOTYPE:
1891	CODE:	2209	CODE:
1892	RETVAL = cctx_count;	2210	RETVAL = cctx_count;
1893	OUTPUT:	2211	OUTPUT:
1894	RETVAL	2212	RETVAL
1895		2213
1896	int	2214	int
1897	cctx_idle ()	2215	cctx_idle ()
		2216	PROTOTYPE:
1898	CODE:	2217	CODE:
1899	RETVAL = cctx_idle;	2218	RETVAL = cctx_idle;
1900	OUTPUT:	2219	OUTPUT:
1901	RETVAL	2220	RETVAL
1902		2221
1903	void	2222	void
1904	list ()	2223	list ()
		2224	PROTOTYPE:
1905	PPCODE:	2225	PPCODE:
1906	{	2226	{
1907	struct coro *coro;	2227	struct coro *coro;
1908	for (coro = coro_first; coro; coro = coro->next)	2228	for (coro = coro_first; coro; coro = coro->next)
1909	if (coro->hv)	2229	if (coro->hv)
…		…
1968	RETVAL = boolSV (coro->flags & ix);	2288	RETVAL = boolSV (coro->flags & ix);
1969	OUTPUT:	2289	OUTPUT:
1970	RETVAL	2290	RETVAL
1971		2291
1972	void	2292	void
		2293	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2294	PROTOTYPE: $;$
		2295	CODE:
		2296	SvREFCNT_dec (self->throw);
		2297	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2298
		2299	void
1973	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2300	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2301	PROTOTYPE: $;$
		2302	C_ARGS: aTHX_ coro, flags
1974		2303
1975	SV *	2304	SV *
1976	has_cctx (Coro::State coro)	2305	has_cctx (Coro::State coro)
1977	PROTOTYPE: $	2306	PROTOTYPE: $
1978	CODE:	2307	CODE:
…		…
1986	CODE:	2315	CODE:
1987	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2316	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1988	OUTPUT:	2317	OUTPUT:
1989	RETVAL	2318	RETVAL
1990		2319
1991	IV	2320	UV
1992	rss (Coro::State coro)	2321	rss (Coro::State coro)
1993	PROTOTYPE: $	2322	PROTOTYPE: $
1994	ALIAS:	2323	ALIAS:
1995	usecount = 1	2324	usecount = 1
1996	CODE:	2325	CODE:
…		…
2002	OUTPUT:	2331	OUTPUT:
2003	RETVAL	2332	RETVAL
2004		2333
2005	void	2334	void
2006	force_cctx ()	2335	force_cctx ()
		2336	PROTOTYPE:
2007	CODE:	2337	CODE:
2008	struct coro *coro = SvSTATE (coro_current);	2338	struct coro *coro = SvSTATE (coro_current);
2009	coro->cctx->idle_sp = 0;	2339	coro->cctx->idle_sp = 0;
2010		2340
2011	void	2341	void
…		…
2013	PROTOTYPE: $	2343	PROTOTYPE: $
2014	ALIAS:	2344	ALIAS:
2015	swap_defav = 1	2345	swap_defav = 1
2016	CODE:	2346	CODE:
2017	if (!self->slot)	2347	if (!self->slot)
2018	croak ("cannot swap state with coroutine that has no saved state");	2348	croak ("cannot swap state with coroutine that has no saved state,");
2019	else	2349	else
2020	{	2350	{
2021	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2351	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2022	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2352	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2023		2353
…		…
2048		2378
2049	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2379	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2050	coro_ready[i] = newAV ();	2380	coro_ready[i] = newAV ();
2051		2381
2052	{	2382	{
2053	SV *sv = perl_get_sv ("Coro::API", TRUE);	2383	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2054	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2055		2384
2056	coroapi.schedule = api_schedule;	2385	coroapi.schedule = api_schedule;
2057	coroapi.cede = api_cede;	2386	coroapi.cede = api_cede;
2058	coroapi.cede_notself = api_cede_notself;	2387	coroapi.cede_notself = api_cede_notself;
2059	coroapi.ready = api_ready;	2388	coroapi.ready = api_ready;
2060	coroapi.is_ready = api_is_ready;	2389	coroapi.is_ready = api_is_ready;
2061	coroapi.nready = &coro_nready;	2390	coroapi.nready = coro_nready;
2062	coroapi.current = coro_current;	2391	coroapi.current = coro_current;
2063		2392
2064	GCoroAPI = &coroapi;	2393	GCoroAPI = &coroapi;
2065	sv_setiv (sv, (IV)&coroapi);	2394	sv_setiv (sv, (IV)&coroapi);
2066	SvREADONLY_on (sv);	2395	SvREADONLY_on (sv);
2067	}	2396	}
2068	}	2397	}
		2398
		2399	void
		2400	schedule (...)
		2401	CODE:
		2402	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), items);
		2403
		2404	void
		2405	cede (...)
		2406	CODE:
		2407	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), items);
		2408
		2409	void
		2410	cede_notself (...)
		2411	CODE:
		2412	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), items);
2069		2413
2070	void	2414	void
2071	_set_current (SV *current)	2415	_set_current (SV *current)
2072	PROTOTYPE: $	2416	PROTOTYPE: $
2073	CODE:	2417	CODE:
…		…
2083	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2427	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2084	UNLOCK;	2428	UNLOCK;
2085		2429
2086	int	2430	int
2087	prio (Coro::State coro, int newprio = 0)	2431	prio (Coro::State coro, int newprio = 0)
		2432	PROTOTYPE: $;$
2088	ALIAS:	2433	ALIAS:
2089	nice = 1	2434	nice = 1
2090	CODE:	2435	CODE:
2091	{	2436	{
2092	RETVAL = coro->prio;	2437	RETVAL = coro->prio;
…		…
2107		2452
2108	SV *	2453	SV *
2109	ready (SV *self)	2454	ready (SV *self)
2110	PROTOTYPE: $	2455	PROTOTYPE: $
2111	CODE:	2456	CODE:
2112	RETVAL = boolSV (api_ready (self));	2457	RETVAL = boolSV (api_ready (aTHX_ self));
2113	OUTPUT:	2458	OUTPUT:
2114	RETVAL	2459	RETVAL
2115		2460
2116	int	2461	int
2117	nready (...)	2462	nready (...)
…		…
2119	CODE:	2464	CODE:
2120	RETVAL = coro_nready;	2465	RETVAL = coro_nready;
2121	OUTPUT:	2466	OUTPUT:
2122	RETVAL	2467	RETVAL
2123		2468
2124	void
2125	throw (Coro::State self, SV *throw = &PL_sv_undef)
2126	PROTOTYPE: $;$
2127	CODE:
2128	SvREFCNT_dec (self->throw);
2129	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2130
2131	# for async_pool speedup	2469	# for async_pool speedup
2132	void	2470	void
2133	_pool_1 (SV *cb)	2471	_pool_1 (SV *cb)
2134	CODE:	2472	CODE:
2135	{	2473	{
…		…
2163	{	2501	{
2164	av_fill (defav, len - 1);	2502	av_fill (defav, len - 1);
2165	for (i = 0; i < len; ++i)	2503	for (i = 0; i < len; ++i)
2166	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2504	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2167	}	2505	}
2168
2169	SvREFCNT_dec (invoke);
2170	}	2506	}
2171		2507
2172	void	2508	void
2173	_pool_2 (SV *cb)	2509	_pool_2 (SV *cb)
2174	CODE:	2510	CODE:
…		…
2178	sv_setsv (cb, &PL_sv_undef);	2514	sv_setsv (cb, &PL_sv_undef);
2179		2515
2180	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2516	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2181	coro->saved_deffh = 0;	2517	coro->saved_deffh = 0;
2182		2518
2183	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2519	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2184	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2520	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2185	{	2521	{
2186	SV *old = PL_diehook;	2522	SV *old = PL_diehook;
2187	PL_diehook = 0;	2523	PL_diehook = 0;
2188	SvREFCNT_dec (old);	2524	SvREFCNT_dec (old);
…		…
2194	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2530	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2195		2531
2196	coro->prio = 0;	2532	coro->prio = 0;
2197		2533
2198	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2534	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2199	api_trace (coro_current, 0);	2535	api_trace (aTHX_ coro_current, 0);
2200		2536
2201	av_push (av_async_pool, newSVsv (coro_current));	2537	av_push (av_async_pool, newSVsv (coro_current));
2202	}	2538	}
2203		2539
2204	#if 0	2540	#if 0
…		…
2252		2588
2253	MODULE = Coro::State PACKAGE = Coro::AIO	2589	MODULE = Coro::State PACKAGE = Coro::AIO
2254		2590
2255	void	2591	void
2256	_get_state (SV *self)	2592	_get_state (SV *self)
		2593	PROTOTYPE: $
2257	PPCODE:	2594	PPCODE:
2258	{	2595	{
2259	AV *defav = GvAV (PL_defgv);	2596	AV *defav = GvAV (PL_defgv);
2260	AV *av = newAV ();	2597	AV *av = newAV ();
2261	int i;	2598	int i;
…		…
2276		2613
2277	av_push (av, data_sv);	2614	av_push (av, data_sv);
2278		2615
2279	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2616	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2280		2617
2281	api_ready (self);	2618	api_ready (aTHX_ self);
2282	}	2619	}
2283		2620
2284	void	2621	void
2285	_set_state (SV *state)	2622	_set_state (SV *state)
2286	PROTOTYPE: $	2623	PROTOTYPE: $
…		…
2306	BOOT:	2643	BOOT:
2307	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2644	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2308		2645
2309	SV *	2646	SV *
2310	_schedule (...)	2647	_schedule (...)
2311	PROTOTYPE: @
2312	CODE:	2648	CODE:
2313	{	2649	{
2314	static int incede;	2650	static int incede;
2315		2651
2316	api_cede_notself ();	2652	api_cede_notself (aTHX);
2317		2653
2318	++incede;	2654	++incede;
2319	while (coro_nready >= incede && api_cede ())	2655	while (coro_nready >= incede && api_cede (aTHX))
2320	;	2656	;
2321		2657
2322	sv_setsv (sv_activity, &PL_sv_undef);	2658	sv_setsv (sv_activity, &PL_sv_undef);
2323	if (coro_nready >= incede)	2659	if (coro_nready >= incede)
2324	{	2660	{
…		…
2334		2670
2335	MODULE = Coro::State PACKAGE = PerlIO::cede	2671	MODULE = Coro::State PACKAGE = PerlIO::cede
2336		2672
2337	BOOT:	2673	BOOT:
2338	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2674	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2675
		2676	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2677
		2678	SV *
		2679	new (SV *klass, SV *count_ = 0)
		2680	CODE:
		2681	{
		2682	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2683	AV *av = newAV ();
		2684	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2685	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2686	}
		2687	OUTPUT:
		2688	RETVAL
		2689
		2690	SV *
		2691	count (SV *self)
		2692	CODE:
		2693	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2694	OUTPUT:
		2695	RETVAL
		2696
		2697	void
		2698	up (SV *self, int adjust = 1)
		2699	ALIAS:
		2700	adjust = 1
		2701	CODE:
		2702	{
		2703	AV *av = (AV *)SvRV (self);
		2704	SV *count_sv = AvARRAY (av)[0];
		2705	IV count = SvIVX (count_sv);
		2706
		2707	count += ix ? adjust : 1;
		2708	SvIVX (count_sv) = count;
		2709
		2710	/* now wake up as many waiters as possible */
		2711	while (count > 0 && AvFILLp (av) >= count)
		2712	{
		2713	SV *cb;
		2714
		2715	/* swap first two elements so we can shift a waiter */
		2716	AvARRAY (av)[0] = AvARRAY (av)[1];
		2717	AvARRAY (av)[1] = count_sv;
		2718	cb = av_shift (av);
		2719
		2720	if (SvOBJECT (cb))
		2721	api_ready (cb);
		2722	else
		2723	croak ("callbacks not yet supported");
		2724
		2725	SvREFCNT_dec (cb);
		2726	}
		2727	}
		2728
		2729	void
		2730	down (SV *self)
		2731	CODE:
		2732	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), items);
		2733
		2734	void
		2735	try (SV *self)
		2736	PPCODE:
		2737	{
		2738	AV *av = (AV *)SvRV (self);
		2739	SV *count_sv = AvARRAY (av)[0];
		2740	IV count = SvIVX (count_sv);
		2741
		2742	if (count > 0)
		2743	{
		2744	--count;
		2745	SvIVX (count_sv) = count;
		2746	XSRETURN_YES;
		2747	}
		2748	else
		2749	XSRETURN_NO;
		2750	}
		2751
		2752	void
		2753	waiters (SV *self)
		2754	CODE:
		2755	{
		2756	AV *av = (AV *)SvRV (self);
		2757
		2758	if (GIMME_V == G_SCALAR)
		2759	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2760	else
		2761	{
		2762	int i;
		2763	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2764	for (i = 1; i <= AvFILLp (av); ++i)
		2765	PUSHs (newSVsv (AvARRAY (av)[i]));
		2766	}
		2767	}
		2768

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