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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.249 by root, Tue Sep 30 17:12:35 2008 UTC vs.
Revision 1.279 by root, Sun Nov 16 08:59:16 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		100
94	/* 5.11 */
95	#ifndef CxHASARGS
96	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97	#endif
98
99	/* 5.8.7 */	101	/* 5.8.7 */
100	#ifndef SvRV_set	102	#ifndef SvRV_set
101	# define SvRV_set(s,v) SvRV(s) = (v)	103	# define SvRV_set(s,v) SvRV(s) = (v)
102	#endif	104	#endif
103		105
…		…
114	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
115	#endif	117	#endif
116		118
117	/* 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
118	* portable way as possible. */	120	* portable way as possible. */
119	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
120	#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
121		126
122	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
123		128
124	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
125	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
126	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
128	#else	133	#else
129	# define attribute(x)	134	# define attribute(x)
130	# define BARRIER
131	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
132	#endif	137	#endif
133		138
134	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
135	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
136		141
137	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
138		143
139	#include "CoroAPI.h"	144	#include "CoroAPI.h"
140		145
141	#ifdef USE_ITHREADS	146	#ifdef USE_ITHREADS
		147
142	static perl_mutex coro_mutex;	148	static perl_mutex coro_lock;
143	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
144	# 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
145	#else	155	#else
		156
146	# define LOCK (void)0	157	# define LOCK (void)0
147	# define UNLOCK (void)0	158	# define UNLOCK (void)0
		159
148	#endif	160	#endif
		161
		162	# undef LOCK
		163	# define LOCK (void)0
		164	# undef UNLOCK
		165	# define UNLOCK (void)0
149		166
150	/* helper storage struct for Coro::AIO */	167	/* helper storage struct for Coro::AIO */
151	struct io_state	168	struct io_state
152	{	169	{
153	AV *res;	170	AV *res;
154	int errorno;	171	int errorno;
155	I32 laststype;	172	I32 laststype; /* U16 in 5.10.0 */
156	int laststatval;	173	int laststatval;
157	Stat_t statcache;	174	Stat_t statcache;
158	};	175	};
159		176
160	static double (nvtime)(); / so why doesn't it take void? */	177	static double (nvtime)(); / so why doesn't it take void? */
161		178
		179	static U32 cctx_gen;
162	static size_t coro_stacksize = CORO_STACKSIZE;	180	static size_t cctx_stacksize = CORO_STACKSIZE;
163	static struct CoroAPI coroapi;	181	static struct CoroAPI coroapi;
164	static AV main_mainstack; / used to differentiate between $main and others */	182	static AV main_mainstack; / used to differentiate between $main and others */
165	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
166	static HV coro_state_stash, coro_stash;	184	static HV coro_state_stash, coro_stash;
167	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;
168		187
169	static GV irsgv; / $/ */	188	static GV irsgv; / $/ */
170	static GV stdoutgv; / STDOUT /	189	static GV stdoutgv; / STDOUT /
171	static SV *rv_diehook;	190	static SV *rv_diehook;
172	static SV *rv_warnhook;	191	static SV *rv_warnhook;
…		…
191	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
192	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
193	};	212	};
194		213
195	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
196	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
197	struct coro_cctx *next;	217	struct coro_cctx *next;
198		218
199	/* the stack */	219	/* the stack */
200	void *sptr;	220	void *sptr;
201	size_t ssize;	221	size_t ssize;
…		…
204	void idle_sp; / sp of top-level transfer/schedule/cede call */	224	void idle_sp; / sp of top-level transfer/schedule/cede call */
205	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 */
206	JMPENV *top_env;	226	JMPENV *top_env;
207	coro_context cctx;	227	coro_context cctx;
208		228
		229	U32 gen;
209	#if CORO_USE_VALGRIND	230	#if CORO_USE_VALGRIND
210	int valgrind_id;	231	int valgrind_id;
211	#endif	232	#endif
212	unsigned char flags;	233	unsigned char flags;
213	} coro_cctx;	234	} coro_cctx;
…		…
218	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
219	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
220	};	241	};
221		242
222	/* 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 */
223	typedef struct {	244	typedef struct
		245	{
224	SV *defsv;	246	SV *defsv;
225	AV *defav;	247	AV *defav;
226	SV *errsv;	248	SV *errsv;
227	SV *irsgv;	249	SV *irsgv;
228	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
232		254
233	#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))
234		256
235	/* this is a structure representing a perl-level coroutine */	257	/* this is a structure representing a perl-level coroutine */
236	struct coro {	258	struct coro {
237	/* the c coroutine allocated to this perl coroutine, if any */	259	/* the C coroutine allocated to this perl coroutine, if any */
238	coro_cctx *cctx;	260	coro_cctx *cctx;
239		261
240	/* process data */	262	/* process data */
		263	struct CoroSLF slf_frame; /* saved slf frame */
241	AV *mainstack;	264	AV *mainstack;
242	perl_slots slot; / basically the saved sp */	265	perl_slots slot; / basically the saved sp */
243		266
244	AV args; / data associated with this coroutine (initial args) */	267	AV args; / data associated with this coroutine (initial args) */
245	int refcnt; /* coroutines are refcounted, yes */	268	int refcnt; /* coroutines are refcounted, yes */
…		…
260	struct coro next, prev;	283	struct coro next, prev;
261	};	284	};
262		285
263	typedef struct coro *Coro__State;	286	typedef struct coro *Coro__State;
264	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 */
265		290
266	/ Coro ******************************************************************/	291	/ Coro ******************************************************************/
267		292
268	#define PRIO_MAX 3	293	#define PRIO_MAX 3
269	#define PRIO_HIGH 1	294	#define PRIO_HIGH 1
…		…
273	#define PRIO_MIN -4	298	#define PRIO_MIN -4
274		299
275	/* for Coro.pm */	300	/* for Coro.pm */
276	static SV *coro_current;	301	static SV *coro_current;
277	static SV *coro_readyhook;	302	static SV *coro_readyhook;
278	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
279	static int coro_nready;
280	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
281		306
282	/ lowlevel stuff ********************************************************/	307	/ lowlevel stuff ********************************************************/
283		308
284	static SV *	309	static SV *
285	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
378	static MGVTBL coro_cv_vtbl = {	403	static MGVTBL coro_cv_vtbl = {
379	0, 0, 0, 0,	404	0, 0, 0, 0,
380	coro_cv_free	405	coro_cv_free
381	};	406	};
382		407
383	#define CORO_MAGIC(sv,type) \	408	#define CORO_MAGIC(sv, type) \
384	SvMAGIC (sv) \	409	SvMAGIC (sv) \
385	? SvMAGIC (sv)->mg_type == type \	410	? SvMAGIC (sv)->mg_type == type \
386	? SvMAGIC (sv) \	411	? SvMAGIC (sv) \
387	: mg_find (sv, type) \	412	: mg_find (sv, type) \
388	: 0	413	: 0
389		414
390	#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)
391	#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)
392		417
393	static struct coro *	418	INLINE struct coro *
394	SvSTATE_ (pTHX_ SV *coro)	419	SvSTATE_ (pTHX_ SV *coro)
395	{	420	{
396	HV *stash;	421	HV *stash;
397	MAGIC *mg;	422	MAGIC *mg;
398		423
…		…
489	CvPADLIST (cv) = (AV *)POPs;	514	CvPADLIST (cv) = (AV *)POPs;
490	}	515	}
491		516
492	PUTBACK;	517	PUTBACK;
493	}	518	}
		519
		520	slf_frame = c->slf_frame;
494	}	521	}
495		522
496	static void	523	static void
497	save_perl (pTHX_ Coro__State c)	524	save_perl (pTHX_ Coro__State c)
498	{	525	{
		526	c->slf_frame = slf_frame;
		527
499	{	528	{
500	dSP;	529	dSP;
501	I32 cxix = cxstack_ix;	530	I32 cxix = cxstack_ix;
502	PERL_CONTEXT *ccstk = cxstack;	531	PERL_CONTEXT *ccstk = cxstack;
503	PERL_SI *top_si = PL_curstackinfo;	532	PERL_SI *top_si = PL_curstackinfo;
…		…
570	#undef VAR	599	#undef VAR
571	}	600	}
572	}	601	}
573		602
574	/*	603	/*
575	* allocate various perl stacks. This is an exact copy	604	* allocate various perl stacks. This is almost an exact copy
576	* of perl.c:init_stacks, except that it uses less memory	605	* of perl.c:init_stacks, except that it uses less memory
577	* on the (sometimes correct) assumption that coroutines do	606	* on the (sometimes correct) assumption that coroutines do
578	* not usually need a lot of stackspace.	607	* not usually need a lot of stackspace.
579	*/	608	*/
580	#if CORO_PREFER_PERL_FUNCTIONS	609	#if CORO_PREFER_PERL_FUNCTIONS
…		…
623		652
624	/*	653	/*
625	* destroy the stacks, the callchain etc...	654	* destroy the stacks, the callchain etc...
626	*/	655	*/
627	static void	656	static void
628	coro_destroy_stacks (pTHX)	657	coro_destruct_stacks (pTHX)
629	{	658	{
630	while (PL_curstackinfo->si_next)	659	while (PL_curstackinfo->si_next)
631	PL_curstackinfo = PL_curstackinfo->si_next;	660	PL_curstackinfo = PL_curstackinfo->si_next;
632		661
633	while (PL_curstackinfo)	662	while (PL_curstackinfo)
…		…
782		811
783	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
784	}	813	}
785		814
786	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
787	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
788	{	830	{
789	/*	831	/*
790	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
791	*/	833	*/
…		…
815	PL_rs = newSVsv (GvSV (irsgv));	857	PL_rs = newSVsv (GvSV (irsgv));
816	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	858	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
817		859
818	{	860	{
819	dSP;	861	dSP;
820	LOGOP myop;	862	UNOP myop;
821		863
822	Zero (&myop, 1, LOGOP);	864	Zero (&myop, 1, UNOP);
823	myop.op_next = Nullop;	865	myop.op_next = Nullop;
824	myop.op_flags = OPf_WANT_VOID;	866	myop.op_flags = OPf_WANT_VOID;
825		867
826	PUSHMARK (SP);	868	PUSHMARK (SP);
827	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
830	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
831	SPAGAIN;	873	SPAGAIN;
832	}	874	}
833		875
834	/* 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
835	* 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.
836	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
837	* so we ENTER here for symmetry
838	*/	878	*/
839	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 */
840	}	881	}
841		882
842	static void	883	static void
843	coro_destroy (pTHX_ struct coro *coro)	884	coro_destruct (pTHX_ struct coro *coro)
844	{	885	{
845	if (!IN_DESTRUCT)	886	if (!IN_DESTRUCT)
846	{	887	{
847	/* restore all saved variables and stuff */	888	/* restore all saved variables and stuff */
848	LEAVE_SCOPE (0);	889	LEAVE_SCOPE (0);
…		…
870	SvREFCNT_dec (PL_warnhook);	911	SvREFCNT_dec (PL_warnhook);
871		912
872	SvREFCNT_dec (coro->saved_deffh);	913	SvREFCNT_dec (coro->saved_deffh);
873	SvREFCNT_dec (coro->throw);	914	SvREFCNT_dec (coro->throw);
874		915
875	coro_destroy_stacks (aTHX);	916	coro_destruct_stacks (aTHX);
876	}	917	}
877		918
878	static void	919	INLINE void
879	free_coro_mortal (pTHX)	920	free_coro_mortal (pTHX)
880	{	921	{
881	if (expect_true (coro_mortal))	922	if (expect_true (coro_mortal))
882	{	923	{
883	SvREFCNT_dec (coro_mortal);	924	SvREFCNT_dec (coro_mortal);
…		…
1007		1048
1008	TAINT_NOT;	1049	TAINT_NOT;
1009	return 0;	1050	return 0;
1010	}	1051	}
1011		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
1012	/* 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 */
1013	/* _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 */
1014	/* during execution of a perl program */	1062	/* during execution of a perl program */
		1063	/* also initialises PL_top_env */
1015	static void NOINLINE	1064	static void NOINLINE
1016	cctx_prepare (pTHX_ coro_cctx *cctx)	1065	cctx_prepare (pTHX_ coro_cctx *cctx)
1017	{	1066	{
1018	dSP;	1067	dSP;
1019	LOGOP myop;	1068	UNOP myop;
1020		1069
1021	PL_top_env = &PL_start_env;	1070	PL_top_env = &PL_start_env;
1022		1071
1023	if (cctx->flags & CC_TRACE)	1072	if (cctx->flags & CC_TRACE)
1024	PL_runops = runops_trace;	1073	PL_runops = runops_trace;
1025		1074
1026	Zero (&myop, 1, LOGOP);	1075	Zero (&myop, 1, UNOP);
1027	myop.op_next = PL_op;	1076	myop.op_next = PL_op;
1028	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	1077	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
1029		1078
1030	PUSHMARK (SP);	1079	PUSHMARK (SP);
1031	EXTEND (SP, 2);	1080	EXTEND (SP, 2);
1032	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1033	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1034	PUTBACK;	1083	PUTBACK;
1035	PL_op = (OP *)&myop;	1084	PL_op = (OP *)&myop;
1036	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1037	SPAGAIN;	1086	SPAGAIN;
1038	}	1087	}
1039		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
1040	/*	1110	/*
1041	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1042	*/	1112	*/
1043	static void	1113	static void
1044	cctx_run (void *arg)	1114	cctx_run (void *arg)
1045	{	1115	{
		1116	#ifdef USE_ITHREADS
		1117	# if CORO_PTHREAD
		1118	PERL_SET_CONTEXT (coro_thx);
		1119	# endif
		1120	#endif
		1121	{
1046	dTHX;	1122	dTHX;
1047		1123
1048	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1124	/* normally we would need to skip the entersub here */
1049	UNLOCK;	1125	/* not doing so will re-execute it, which is exactly what we want */
1050
1051	/* we now skip the entersub that lead to transfer() */
1052	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
1053		1127
1054	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1055	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1056		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
1057	/* 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 */
1058	PL_restartop = PL_op;	1136	PL_restartop = PL_op;
1059	perl_run (PL_curinterp);	1137	perl_run (PL_curinterp);
1060		1138
1061	/*	1139	/*
1062	* 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
1063	* 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)
1064	* 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
1065	* bootstrap-time "top" top_env, as we cannot restore the "main"	1143	* bootstrap-time "top" top_env, as we cannot restore the "main"
1066	* coroutine as Coro has no such concept	1144	* coroutine as Coro has no such concept
1067	*/	1145	*/
1068	PL_top_env = main_top_env;	1146	PL_top_env = main_top_env;
1069	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	}
1070	}	1149	}
1071		1150
1072	static coro_cctx *	1151	static coro_cctx *
1073	cctx_new ()	1152	cctx_new ()
1074	{	1153	{
1075	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 ();
1076	void *stack_start;	1183	void *stack_start;
1077	size_t stack_size;	1184	size_t stack_size;
1078		1185
1079	++cctx_count;
1080
1081	Newz (0, cctx, 1, coro_cctx);
1082
1083	#if HAVE_MMAP	1186	#if HAVE_MMAP
1084	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;
1085	/* mmap supposedly does allocate-on-write for us */	1188	/* mmap supposedly does allocate-on-write for us */
1086	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);
1087		1190
1088	if (cctx->sptr != (void *)-1)	1191	if (cctx->sptr != (void *)-1)
1089	{	1192	{
1090	# if CORO_STACKGUARD	1193	#if CORO_STACKGUARD
1091	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1194	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1092	# endif	1195	#endif
1093	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1196	stack_start = (char )cctx->sptr + CORO_STACKGUARD PAGESIZE;
1094	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1197	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1095	cctx->flags \|= CC_MAPPED;	1198	cctx->flags \|= CC_MAPPED;
1096	}	1199	}
1097	else	1200	else
1098	#endif	1201	#endif
1099	{	1202	{
1100	cctx->ssize = coro_stacksize * (long)sizeof (long);	1203	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1101	New (0, cctx->sptr, coro_stacksize, long);	1204	New (0, cctx->sptr, cctx_stacksize, long);
1102		1205
1103	if (!cctx->sptr)	1206	if (!cctx->sptr)
1104	{	1207	{
1105	perror ("FATAL: unable to allocate stack for coroutine");	1208	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1106	_exit (EXIT_FAILURE);	1209	_exit (EXIT_FAILURE);
1107	}	1210	}
1108		1211
1109	stack_start = cctx->sptr;	1212	stack_start = cctx->sptr;
1110	stack_size = cctx->ssize;	1213	stack_size = cctx->ssize;
1111	}	1214	}
1112		1215
1113	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
1114	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);
1115		1221
1116	return cctx;	1222	return cctx;
1117	}	1223	}
1118		1224
…		…
1121	{	1227	{
1122	if (!cctx)	1228	if (!cctx)
1123	return;	1229	return;
1124		1230
1125	--cctx_count;	1231	--cctx_count;
		1232	coro_destroy (&cctx->cctx);
1126		1233
		1234	/* coro_transfer creates new, empty cctx's */
		1235	if (cctx->sptr)
		1236	{
1127	#if CORO_USE_VALGRIND	1237	#if CORO_USE_VALGRIND
1128	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1238	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1129	#endif	1239	#endif
1130		1240
1131	#if HAVE_MMAP	1241	#if HAVE_MMAP
1132	if (cctx->flags & CC_MAPPED)	1242	if (cctx->flags & CC_MAPPED)
1133	munmap (cctx->sptr, cctx->ssize);	1243	munmap (cctx->sptr, cctx->ssize);
1134	else	1244	else
1135	#endif	1245	#endif
1136	Safefree (cctx->sptr);	1246	Safefree (cctx->sptr);
		1247	}
1137		1248
1138	Safefree (cctx);	1249	Safefree (cctx);
1139	}	1250	}
1140		1251
1141	/* wether this cctx should be destructed */	1252	/* wether this cctx should be destructed */
1142	#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))
1143		1254
1144	static coro_cctx *	1255	static coro_cctx *
1145	cctx_get (pTHX)	1256	cctx_get (pTHX)
1146	{	1257	{
1147	while (expect_true (cctx_first))	1258	while (expect_true (cctx_first))
…		…
1154	return cctx;	1265	return cctx;
1155		1266
1156	cctx_destroy (cctx);	1267	cctx_destroy (cctx);
1157	}	1268	}
1158		1269
1159	return cctx_new ();	1270	return cctx_new_run ();
1160	}	1271	}
1161		1272
1162	static void	1273	static void
1163	cctx_put (coro_cctx *cctx)	1274	cctx_put (coro_cctx *cctx)
1164	{	1275	{
		1276	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
		1277
1165	/* free another cctx if overlimit */	1278	/* free another cctx if overlimit */
1166	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1279	if (expect_false (cctx_idle >= cctx_max_idle))
1167	{	1280	{
1168	coro_cctx *first = cctx_first;	1281	coro_cctx *first = cctx_first;
1169	cctx_first = first->next;	1282	cctx_first = first->next;
1170	--cctx_idle;	1283	--cctx_idle;
1171		1284
…		…
1183	transfer_check (pTHX_ struct coro prev, struct coro next)	1296	transfer_check (pTHX_ struct coro prev, struct coro next)
1184	{	1297	{
1185	if (expect_true (prev != next))	1298	if (expect_true (prev != next))
1186	{	1299	{
1187	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))	1300	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
1188	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,");
1189		1302
1190	if (expect_false (next->flags & CF_RUNNING))	1303	if (expect_false (next->flags & CF_RUNNING))
1191	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,");
1192		1305
1193	if (expect_false (next->flags & CF_DESTROYED))	1306	if (expect_false (next->flags & CF_DESTROYED))
1194	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,");
1195		1308
1196	#if !PERL_VERSION_ATLEAST (5,10,0)	1309	#if !PERL_VERSION_ATLEAST (5,10,0)
1197	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1310	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1198	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,");
1199	#endif	1312	#endif
1200	}	1313	}
1201	}	1314	}
1202		1315
1203	/* always use the TRANSFER macro */	1316	/* always use the TRANSFER macro */
1204	static void NOINLINE	1317	static void NOINLINE
1205	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)	1318	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
1206	{	1319	{
1207	dSTACKLEVEL;	1320	dSTACKLEVEL;
1208	static volatile int has_throw;
1209		1321
1210	/* sometimes transfer is only called to set idle_sp */	1322	/* sometimes transfer is only called to set idle_sp */
1211	if (expect_false (!next))	1323	if (expect_false (!next))
1212	{	1324	{
1213	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1325	((coro_cctx )prev)->idle_sp = (void )stacklevel;
1214	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 */
1215	}	1327	}
1216	else if (expect_true (prev != next))	1328	else if (expect_true (prev != next))
1217	{	1329	{
1218	coro_cctx *prev__cctx;	1330	coro_cctx *prev__cctx;
1219		1331
1220	if (expect_false (prev->flags & CF_NEW))	1332	if (expect_false (prev->flags & CF_NEW))
1221	{	1333	{
1222	/* create a new empty context */	1334	/* create a new empty/source context */
1223	Newz (0, prev->cctx, 1, coro_cctx);	1335	prev->cctx = cctx_new_empty ();
1224	prev->flags &= ~CF_NEW;	1336	prev->flags &= ~CF_NEW;
1225	prev->flags \|= CF_RUNNING;	1337	prev->flags \|= CF_RUNNING;
1226	}	1338	}
1227		1339
1228	prev->flags &= ~CF_RUNNING;	1340	prev->flags &= ~CF_RUNNING;
…		…
1243	else	1355	else
1244	load_perl (aTHX_ next);	1356	load_perl (aTHX_ next);
1245		1357
1246	prev__cctx = prev->cctx;	1358	prev__cctx = prev->cctx;
1247		1359
1248	/* possibly "free" the cctx */	1360	/* possibly untie and reuse the cctx */
1249	if (expect_true (	1361	if (expect_true (
1250	prev__cctx->idle_sp == STACKLEVEL	1362	prev__cctx->idle_sp == (void *)stacklevel
1251	&& !(prev__cctx->flags & CC_TRACE)	1363	&& !(prev__cctx->flags & CC_TRACE)
1252	&& !force_cctx	1364	&& !force_cctx
1253	))	1365	))
1254	{	1366	{
1255	/* 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 */
1256	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));
1257		1369
1258	prev->cctx = 0;	1370	prev->cctx = 0;
1259		1371
1260	/* 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 */
1261	/* 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 */
…		…
1269	++next->usecount;	1381	++next->usecount;
1270		1382
1271	if (expect_true (!next->cctx))	1383	if (expect_true (!next->cctx))
1272	next->cctx = cctx_get (aTHX);	1384	next->cctx = cctx_get (aTHX);
1273		1385
1274	has_throw = !!next->throw;	1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1387	transfer_next = next;
1275		1388
1276	if (expect_false (prev__cctx != next->cctx))	1389	if (expect_false (prev__cctx != next->cctx))
1277	{	1390	{
1278	prev__cctx->top_env = PL_top_env;	1391	prev__cctx->top_env = PL_top_env;
1279	PL_top_env = next->cctx->top_env;	1392	PL_top_env = next->cctx->top_env;
1280	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1281	}	1394	}
1282		1395
1283	free_coro_mortal (aTHX);	1396	transfer_tail (aTHX);
1284	UNLOCK;
1285
1286	if (expect_false (has_throw))
1287	{
1288	struct coro *coro = SvSTATE (coro_current);
1289
1290	if (coro->throw)
1291	{
1292	SV *exception = coro->throw;
1293	coro->throw = 0;
1294	sv_setsv (ERRSV, exception);
1295	croak (0);
1296	}
1297	}
1298	}	1397	}
1299	}	1398	}
1300
1301	struct transfer_args
1302	{
1303	struct coro prev, next;
1304	};
1305		1399
1306	#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))
1307	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1401	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1308		1402
1309	/ high level stuff ******************************************************/	1403	/ high level stuff ******************************************************/
…		…
1329		1423
1330	if (coro->mainstack && coro->mainstack != main_mainstack)	1424	if (coro->mainstack && coro->mainstack != main_mainstack)
1331	{	1425	{
1332	struct coro temp;	1426	struct coro temp;
1333		1427
1334	if (coro->flags & CF_RUNNING)	1428	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1335	croak ("FATAL: tried to destroy currently running coroutine");
1336		1429
1337	save_perl (aTHX_ &temp);	1430	save_perl (aTHX_ &temp);
1338	load_perl (aTHX_ coro);	1431	load_perl (aTHX_ coro);
1339		1432
1340	coro_destroy (aTHX_ coro);	1433	coro_destruct (aTHX_ coro);
1341		1434
1342	load_perl (aTHX_ &temp);	1435	load_perl (aTHX_ &temp);
1343		1436
1344	coro->slot = 0;	1437	coro->slot = 0;
1345	}	1438	}
…		…
1391	# define MGf_DUP 0	1484	# define MGf_DUP 0
1392	#endif	1485	#endif
1393	};	1486	};
1394		1487
1395	static void	1488	static void
1396	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)
1397	{	1490	{
1398	ta->prev = SvSTATE (prev_sv);	1491	ta->prev = SvSTATE (prev_sv);
1399	ta->next = SvSTATE (next_sv);	1492	ta->next = SvSTATE (next_sv);
1400	TRANSFER_CHECK (*ta);	1493	TRANSFER_CHECK (*ta);
1401	}	1494	}
1402		1495
1403	static void	1496	static void
1404	api_transfer (SV prev_sv, SV next_sv)	1497	api_transfer (pTHX_ SV prev_sv, SV next_sv)
1405	{	1498	{
1406	dTHX;
1407	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1408		1500
1409	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1410	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1411	}	1503	}
1412		1504
…		…
1429		1521
1430	return 0;	1522	return 0;
1431	}	1523	}
1432		1524
1433	static int	1525	static int
1434	api_ready (SV *coro_sv)	1526	api_ready (pTHX_ SV *coro_sv)
1435	{	1527	{
1436	dTHX;
1437	struct coro *coro;	1528	struct coro *coro;
1438	SV *sv_hook;	1529	SV *sv_hook;
1439	void (*xs_hook)(void);	1530	void (*xs_hook)(void);
1440		1531
1441	if (SvROK (coro_sv))	1532	if (SvROK (coro_sv))
…		…
1479		1570
1480	return 1;	1571	return 1;
1481	}	1572	}
1482		1573
1483	static int	1574	static int
1484	api_is_ready (SV *coro_sv)	1575	api_is_ready (pTHX_ SV *coro_sv)
1485	{	1576	{
1486	dTHX;
1487	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1488	}	1578	}
1489		1579
1490	static void	1580	INLINE void
1491	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1492	{	1582	{
1493	SV prev_sv, next_sv;	1583	SV prev_sv, next_sv;
1494		1584
1495	for (;;)	1585	for (;;)
1496	{	1586	{
…		…
1521	/* cannot transfer to destroyed coros, skip and look for next */	1611	/* cannot transfer to destroyed coros, skip and look for next */
1522	if (expect_false (ta->next->flags & CF_DESTROYED))	1612	if (expect_false (ta->next->flags & CF_DESTROYED))
1523	{	1613	{
1524	UNLOCK;	1614	UNLOCK;
1525	SvREFCNT_dec (next_sv);	1615	SvREFCNT_dec (next_sv);
1526	/* coro_nready is already taken care of by destroy */	1616	/* coro_nready has already been taken care of by destroy */
1527	continue;	1617	continue;
1528	}	1618	}
1529		1619
1530	--coro_nready;	1620	--coro_nready;
1531	UNLOCK;	1621	UNLOCK;
…		…
1534		1624
1535	/* free this only after the transfer */	1625	/* free this only after the transfer */
1536	prev_sv = SvRV (coro_current);	1626	prev_sv = SvRV (coro_current);
1537	ta->prev = SvSTATE (prev_sv);	1627	ta->prev = SvSTATE (prev_sv);
1538	TRANSFER_CHECK (*ta);	1628	TRANSFER_CHECK (*ta);
1539	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));
1540	ta->next->flags &= ~CF_READY;	1630	ta->next->flags &= ~CF_READY;
1541	SvRV_set (coro_current, next_sv);	1631	SvRV_set (coro_current, next_sv);
1542		1632
1543	LOCK;	1633	LOCK;
1544	free_coro_mortal (aTHX);	1634	free_coro_mortal (aTHX);
1545	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1546	UNLOCK;	1636	UNLOCK;
1547	}	1637	}
1548		1638
1549	static void	1639	INLINE void
1550	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1551	{	1641	{
1552	api_ready (coro_current);	1642	api_ready (aTHX_ coro_current);
1553	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1554	}	1644	}
1555		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
1556	static int	1669	static int
1557	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1670	api_cede (pTHX)
1558	{	1671	{
1559	if (coro_nready)	1672	struct coro_transfer_args ta;
1560	{	1673
1561	SV *prev = SvRV (coro_current);
1562	prepare_schedule (aTHX_ ta);	1674	prepare_cede (aTHX_ &ta);
1563	api_ready (prev);	1675
		1676	if (expect_true (ta.prev != ta.next))
		1677	{
		1678	TRANSFER (ta, 1);
1564	return 1;	1679	return 1;
1565	}	1680	}
1566	else	1681	else
1567	return 0;	1682	return 0;
1568	}	1683	}
1569		1684
1570	static void
1571	api_schedule (void)
1572	{
1573	dTHX;
1574	struct transfer_args ta;
1575
1576	prepare_schedule (aTHX_ &ta);
1577	TRANSFER (ta, 1);
1578	}
1579
1580	static int	1685	static int
1581	api_cede (void)	1686	api_cede_notself (pTHX)
1582	{	1687	{
1583	dTHX;	1688	if (coro_nready)
		1689	{
1584	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1585		1691
1586	prepare_cede (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1587
1588	if (expect_true (ta.prev != ta.next))
1589	{
1590	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1591	return 1;	1694	return 1;
1592	}	1695	}
1593	else	1696	else
1594	return 0;	1697	return 0;
1595	}	1698	}
1596		1699
1597	static int	1700	static void
1598	api_cede_notself (void)
1599	{
1600	dTHX;
1601	struct transfer_args ta;
1602
1603	if (prepare_cede_notself (aTHX_ &ta))
1604	{
1605	TRANSFER (ta, 1);
1606	return 1;
1607	}
1608	else
1609	return 0;
1610	}
1611
1612	static void
1613	api_trace (SV *coro_sv, int flags)	1701	api_trace (pTHX_ SV *coro_sv, int flags)
1614	{	1702	{
1615	dTHX;
1616	struct coro *coro = SvSTATE (coro_sv);	1703	struct coro *coro = SvSTATE (coro_sv);
1617		1704
1618	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1619	{	1706	{
1620	if (!coro->cctx)	1707	if (!coro->cctx)
1621	coro->cctx = cctx_new ();	1708	coro->cctx = cctx_new_run ();
1622	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1623	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1624		1711
1625	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));	1712	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
1626	}	1713	}
1627	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1628	{	1715	{
…		…
1633	else	1720	else
1634	coro->slot->runops = RUNOPS_DEFAULT;	1721	coro->slot->runops = RUNOPS_DEFAULT;
1635	}	1722	}
1636	}	1723	}
1637		1724
1638	static int
1639	coro_gensub_free (pTHX_ SV sv, MAGIC mg)
1640	{
1641	AV *padlist;
1642	AV av = (AV )mg->mg_obj;
1643
1644	abort ();
1645
1646	return 0;
1647	}
1648
1649	static MGVTBL coro_gensub_vtbl = {
1650	0, 0, 0, 0,
1651	coro_gensub_free
1652	};
1653
1654	/*****************************************************************************/	1725	/*****************************************************************************/
1655	/* PerlIO::cede */	1726	/* PerlIO::cede */
1656		1727
1657	typedef struct	1728	typedef struct
1658	{	1729	{
…		…
1685	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1756	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686	double now = nvtime ();	1757	double now = nvtime ();
1687		1758
1688	if (now >= self->next)	1759	if (now >= self->next)
1689	{	1760	{
1690	api_cede ();	1761	api_cede (aTHX);
1691	self->next = now + self->every;	1762	self->next = now + self->every;
1692	}	1763	}
1693		1764
1694	return PerlIOBuf_flush (aTHX_ f);	1765	return PerlIOBuf_flush (aTHX_ f);
1695	}	1766	}
…		…
1724	PerlIOBuf_get_ptr,	1795	PerlIOBuf_get_ptr,
1725	PerlIOBuf_get_cnt,	1796	PerlIOBuf_get_cnt,
1726	PerlIOBuf_set_ptrcnt,	1797	PerlIOBuf_set_ptrcnt,
1727	};	1798	};
1728		1799
		1800	/*****************************************************************************/
		1801
		1802	static const CV slf_cv; / for quick consistency check */
		1803
		1804	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1805	static SV *slf_arg0;
		1806	static SV *slf_arg1;
		1807	static SV *slf_arg2;
		1808
		1809	/* this restores the stack in the case we patched the entersub, to */
		1810	/* recreate the stack frame as perl will on following calls */
		1811	/* since entersub cleared the stack */
		1812	static OP *
		1813	pp_restore (pTHX)
		1814	{
		1815	dSP;
		1816
		1817	PUSHMARK (SP);
		1818
		1819	EXTEND (SP, 3);
		1820	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1821	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1822	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1823	PUSHs ((SV *)CvGV (slf_cv));
		1824
		1825	RETURNOP (slf_restore.op_first);
		1826	}
		1827
		1828	static void
		1829	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1830	{
		1831	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1832	}
		1833
		1834	static void
		1835	slf_init_set_stacklevel (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1836	{
		1837	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1838
		1839	frame->prepare = slf_prepare_set_stacklevel;
		1840	frame->check = slf_check_nop;
		1841	frame->data = (void *)SvIV (arg [0]);
		1842	}
		1843
		1844	static void
		1845	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1846	{
		1847	SV arg = (SV )slf_frame.data;
		1848
		1849	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1850	}
		1851
		1852	static void
		1853	slf_init_transfer (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1854	{
		1855	if (items != 2)
		1856	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1857
		1858	frame->prepare = slf_prepare_transfer;
		1859	frame->check = slf_check_nop;
		1860	frame->data = (void )arg; / let's hope it will stay valid */
		1861	}
		1862
		1863	static void
		1864	slf_init_schedule (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1865	{
		1866	frame->prepare = prepare_schedule;
		1867	frame->check = slf_check_nop;
		1868	}
		1869
		1870	static void
		1871	slf_init_cede (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1872	{
		1873	frame->prepare = prepare_cede;
		1874	frame->check = slf_check_nop;
		1875	}
		1876
		1877	static void
		1878	slf_init_cede_notself (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1879	{
		1880	frame->prepare = prepare_cede_notself;
		1881	frame->check = slf_check_nop;
		1882	}
		1883
		1884	/* we hijack an hopefully unused CV flag for our purposes */
		1885	#define CVf_SLF 0x4000
		1886
		1887	/*
		1888	* these not obviously related functions are all rolled into one
		1889	* function to increase chances that they all will call transfer with the same
		1890	* stack offset
		1891	* SLF stands for "schedule-like-function".
		1892	*/
		1893	static OP *
		1894	pp_slf (pTHX)
		1895	{
		1896	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1897
		1898	/* set up the slf frame, unless it has already been set-up */
		1899	/* the latter happens when a new coro has been started */
		1900	/* or when a new cctx was attached to an existing coroutine */
		1901	if (expect_true (!slf_frame.prepare))
		1902	{
		1903	/* first iteration */
		1904	dSP;
		1905	SV **arg = PL_stack_base + TOPMARK + 1;
		1906	int items = SP - arg; /* args without function object */
		1907	SV gv = sp;
		1908
		1909	/* do a quick consistency check on the "function" object, and if it isn't */
		1910	/* for us, divert to the real entersub */
		1911	if (SvTYPE (gv) != SVt_PVGV \|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1912	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1913
		1914	/* pop args */
		1915	SP = PL_stack_base + POPMARK;
		1916
		1917	if (!(PL_op->op_flags & OPf_STACKED))
		1918	{
		1919	/* ampersand-form of call, use @_ instead of stack */
		1920	AV *av = GvAV (PL_defgv);
		1921	arg = AvARRAY (av);
		1922	items = AvFILLp (av) + 1;
		1923	}
		1924
		1925	PUTBACK;
		1926
		1927	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, GvCV (gv), arg, items);
		1928	}
		1929
		1930	/* now interpret the slf_frame */
		1931	/* we use a callback system not to make the code needlessly */
		1932	/* complicated, but so we can run multiple perl coros from one cctx */
		1933
		1934	do
		1935	{
		1936	struct coro_transfer_args ta;
		1937
		1938	slf_frame.prepare (aTHX_ &ta);
		1939	TRANSFER (ta, 0);
		1940
		1941	checkmark = PL_stack_sp - PL_stack_base;
		1942	}
		1943	while (slf_frame.check (aTHX_ &slf_frame));
		1944
		1945	{
		1946	dSP;
		1947	SV **bot = PL_stack_base + checkmark;
		1948	int gimme = GIMME_V;
		1949
		1950	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
		1951
		1952	/* make sure we put something on the stack in scalar context */
		1953	if (gimme == G_SCALAR)
		1954	{
		1955	if (sp == bot)
		1956	XPUSHs (&PL_sv_undef);
		1957
		1958	SP = bot + 1;
		1959	}
		1960
		1961	PUTBACK;
		1962	}
		1963
		1964	return NORMAL;
		1965	}
		1966
		1967	static void
		1968	api_execute_slf (pTHX_ CV cv, coro_slf_cb init_cb, SV *arg, int items)
		1969	{
		1970	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1971
		1972	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1973	&& PL_op->op_ppaddr != pp_slf)
		1974	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1975
		1976	if (items > 3)
		1977	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
		1978
		1979	CvFLAGS (cv) \|= CVf_SLF;
		1980	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1981	slf_cv = cv;
		1982
		1983	/* we patch the op, and then re-run the whole call */
		1984	/* we have to put the same argument on the stack for this to work */
		1985	/* and this will be done by pp_restore */
		1986	slf_restore.op_next = (OP *)&slf_restore;
		1987	slf_restore.op_type = OP_NULL;
		1988	slf_restore.op_ppaddr = pp_restore;
		1989	slf_restore.op_first = PL_op;
		1990
		1991	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		1992	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		1993	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
		1994
		1995	PL_op->op_ppaddr = pp_slf;
		1996
		1997	PL_op = (OP *)&slf_restore;
		1998	}
		1999
		2000	/*****************************************************************************/
		2001
		2002	static int
		2003	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2004	{
		2005	AV av = (AV )frame->data;
		2006	SV *count_sv = AvARRAY (av)[0];
		2007
		2008	if (SvIVX (count_sv) > 0)
		2009	{
		2010	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2011	return 0;
		2012	}
		2013	else
		2014	{
		2015	int i;
		2016	/* if we were woken up but can't down, we look through the whole */
		2017	/* waiters list and only add us if we aren't in there already */
		2018	/* this avoids some degenerate memory usage cases */
		2019
		2020	for (i = 1; i <= AvFILLp (av); ++i)
		2021	if (AvARRAY (av)[i] == SvRV (coro_current))
		2022	return 1;
		2023
		2024	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2025	return 1;
		2026	}
		2027	}
		2028
		2029	static void
		2030	slf_init_semaphore_down (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2031	{
		2032	AV av = (AV )SvRV (arg [0]);
		2033
		2034	if (SvIVX (AvARRAY (av)[0]) > 0)
		2035	{
		2036	frame->data = (void *)av;
		2037	frame->prepare = prepare_nop;
		2038	}
		2039	else
		2040	{
		2041	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2042
		2043	frame->data = (void )sv_2mortal (SvREFCNT_inc ((SV )av));
		2044	frame->prepare = prepare_schedule;
		2045	}
		2046
		2047	frame->check = slf_check_semaphore_down;
		2048
		2049	}
		2050
		2051	/*****************************************************************************/
		2052
		2053	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2054
		2055	/* create a closure from XS, returns a code reference */
		2056	/* the arg can be accessed via GENSUB_ARG from the callback */
		2057	/* the callback must use dXSARGS/XSRETURN */
		2058	static SV *
		2059	gensub (pTHX_ void (xsub)(pTHX_ CV ), void *arg)
		2060	{
		2061	CV cv = (CV )NEWSV (0, 0);
		2062
		2063	sv_upgrade ((SV *)cv, SVt_PVCV);
		2064
		2065	CvANON_on (cv);
		2066	CvISXSUB_on (cv);
		2067	CvXSUB (cv) = xsub;
		2068	GENSUB_ARG = arg;
		2069
		2070	return newRV_noinc ((SV *)cv);
		2071	}
		2072
		2073	/*****************************************************************************/
1729		2074
1730	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2075	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1731		2076
1732	PROTOTYPES: DISABLE	2077	PROTOTYPES: DISABLE
1733		2078
1734	BOOT:	2079	BOOT:
1735	{	2080	{
1736	#ifdef USE_ITHREADS	2081	#ifdef USE_ITHREADS
1737	MUTEX_INIT (&coro_mutex);	2082	MUTEX_INIT (&coro_lock);
		2083	# if CORO_PTHREAD
		2084	coro_thx = PERL_GET_CONTEXT;
		2085	# endif
1738	#endif	2086	#endif
1739	BOOT_PAGESIZE;	2087	BOOT_PAGESIZE;
1740		2088
1741	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);	2089	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
1742	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);	2090	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
…		…
1760	main_top_env = PL_top_env;	2108	main_top_env = PL_top_env;
1761		2109
1762	while (main_top_env->je_prev)	2110	while (main_top_env->je_prev)
1763	main_top_env = main_top_env->je_prev;	2111	main_top_env = main_top_env->je_prev;
1764		2112
1765	coroapi.ver = CORO_API_VERSION;	2113	coroapi.ver = CORO_API_VERSION;
1766	coroapi.rev = CORO_API_REVISION;	2114	coroapi.rev = CORO_API_REVISION;
		2115
1767	coroapi.transfer = api_transfer;	2116	coroapi.transfer = api_transfer;
		2117
		2118	coroapi.sv_state = SvSTATE_;
		2119	coroapi.execute_slf = api_execute_slf;
		2120	coroapi.prepare_nop = prepare_nop;
		2121	coroapi.prepare_schedule = prepare_schedule;
		2122	coroapi.prepare_cede = prepare_cede;
		2123	coroapi.prepare_cede_notself = prepare_cede_notself;
1768		2124
1769	{	2125	{
1770	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2126	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1771		2127
1772	if (!svp) croak ("Time::HiRes is required");	2128	if (!svp) croak ("Time::HiRes is required");
…		…
1805	av_push (coro->args, newSVsv (ST (i)));	2161	av_push (coro->args, newSVsv (ST (i)));
1806	}	2162	}
1807	OUTPUT:	2163	OUTPUT:
1808	RETVAL	2164	RETVAL
1809		2165
1810	# these not obviously related functions are all rolled into the same xs
1811	# function to increase chances that they all will call transfer with the same
1812	# stack offset
1813	void	2166	void
1814	_set_stacklevel (...)	2167	_set_stacklevel (...)
1815	ALIAS:	2168	CODE:
1816	Coro::State::transfer = 1	2169	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1817	Coro::schedule = 2
1818	Coro::cede = 3
1819	Coro::cede_notself = 4
1820	CODE:
1821	{
1822	struct transfer_args ta;
1823		2170
1824	PUTBACK;	2171	void
1825	switch (ix)	2172	transfer (...)
1826	{	2173	PROTOTYPE: $$
1827	case 0:	2174	CODE:
1828	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	2175	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1829	ta.next = 0;
1830	break;
1831
1832	case 1:
1833	if (items != 2)
1834	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1835
1836	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1837	break;
1838
1839	case 2:
1840	prepare_schedule (aTHX_ &ta);
1841	break;
1842
1843	case 3:
1844	prepare_cede (aTHX_ &ta);
1845	break;
1846
1847	case 4:
1848	if (!prepare_cede_notself (aTHX_ &ta))
1849	XSRETURN_EMPTY;
1850
1851	break;
1852	}
1853	SPAGAIN;
1854
1855	BARRIER;
1856	PUTBACK;
1857	TRANSFER (ta, 0);
1858	SPAGAIN; /* might be the sp of a different coroutine now */
1859	/* be extra careful not to ever do anything after TRANSFER */
1860	}
1861		2176
1862	bool	2177	bool
1863	_destroy (SV *coro_sv)	2178	_destroy (SV *coro_sv)
1864	CODE:	2179	CODE:
1865	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2180	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1872	CODE:	2187	CODE:
1873	_exit (code);	2188	_exit (code);
1874		2189
1875	int	2190	int
1876	cctx_stacksize (int new_stacksize = 0)	2191	cctx_stacksize (int new_stacksize = 0)
		2192	PROTOTYPE: ;$
1877	CODE:	2193	CODE:
1878	RETVAL = coro_stacksize;	2194	RETVAL = cctx_stacksize;
1879	if (new_stacksize)	2195	if (new_stacksize)
		2196	{
1880	coro_stacksize = new_stacksize;	2197	cctx_stacksize = new_stacksize;
		2198	++cctx_gen;
		2199	}
1881	OUTPUT:	2200	OUTPUT:
1882	RETVAL	2201	RETVAL
1883		2202
1884	int	2203	int
		2204	cctx_max_idle (int max_idle = 0)
		2205	PROTOTYPE: ;$
		2206	CODE:
		2207	RETVAL = cctx_max_idle;
		2208	if (max_idle > 1)
		2209	cctx_max_idle = max_idle;
		2210	OUTPUT:
		2211	RETVAL
		2212
		2213	int
1885	cctx_count ()	2214	cctx_count ()
		2215	PROTOTYPE:
1886	CODE:	2216	CODE:
1887	RETVAL = cctx_count;	2217	RETVAL = cctx_count;
1888	OUTPUT:	2218	OUTPUT:
1889	RETVAL	2219	RETVAL
1890		2220
1891	int	2221	int
1892	cctx_idle ()	2222	cctx_idle ()
		2223	PROTOTYPE:
1893	CODE:	2224	CODE:
1894	RETVAL = cctx_idle;	2225	RETVAL = cctx_idle;
1895	OUTPUT:	2226	OUTPUT:
1896	RETVAL	2227	RETVAL
1897		2228
1898	void	2229	void
1899	list ()	2230	list ()
		2231	PROTOTYPE:
1900	PPCODE:	2232	PPCODE:
1901	{	2233	{
1902	struct coro *coro;	2234	struct coro *coro;
1903	for (coro = coro_first; coro; coro = coro->next)	2235	for (coro = coro_first; coro; coro = coro->next)
1904	if (coro->hv)	2236	if (coro->hv)
…		…
1963	RETVAL = boolSV (coro->flags & ix);	2295	RETVAL = boolSV (coro->flags & ix);
1964	OUTPUT:	2296	OUTPUT:
1965	RETVAL	2297	RETVAL
1966		2298
1967	void	2299	void
		2300	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2301	PROTOTYPE: $;$
		2302	CODE:
		2303	SvREFCNT_dec (self->throw);
		2304	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2305
		2306	void
1968	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2307	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		2308	PROTOTYPE: $;$
		2309	C_ARGS: aTHX_ coro, flags
1969		2310
1970	SV *	2311	SV *
1971	has_cctx (Coro::State coro)	2312	has_cctx (Coro::State coro)
1972	PROTOTYPE: $	2313	PROTOTYPE: $
1973	CODE:	2314	CODE:
…		…
1981	CODE:	2322	CODE:
1982	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2323	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1983	OUTPUT:	2324	OUTPUT:
1984	RETVAL	2325	RETVAL
1985		2326
1986	IV	2327	UV
1987	rss (Coro::State coro)	2328	rss (Coro::State coro)
1988	PROTOTYPE: $	2329	PROTOTYPE: $
1989	ALIAS:	2330	ALIAS:
1990	usecount = 1	2331	usecount = 1
1991	CODE:	2332	CODE:
…		…
1997	OUTPUT:	2338	OUTPUT:
1998	RETVAL	2339	RETVAL
1999		2340
2000	void	2341	void
2001	force_cctx ()	2342	force_cctx ()
		2343	PROTOTYPE:
2002	CODE:	2344	CODE:
2003	struct coro *coro = SvSTATE (coro_current);	2345	struct coro *coro = SvSTATE (coro_current);
2004	coro->cctx->idle_sp = 0;	2346	coro->cctx->idle_sp = 0;
2005
2006	void
2007	throw (Coro::State self, SV *throw = &PL_sv_undef)
2008	PROTOTYPE: $;$
2009	CODE:
2010	SvREFCNT_dec (self->throw);
2011	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2012		2347
2013	void	2348	void
2014	swap_defsv (Coro::State self)	2349	swap_defsv (Coro::State self)
2015	PROTOTYPE: $	2350	PROTOTYPE: $
2016	ALIAS:	2351	ALIAS:
2017	swap_defav = 1	2352	swap_defav = 1
2018	CODE:	2353	CODE:
2019	if (!self->slot)	2354	if (!self->slot)
2020	croak ("cannot swap state with coroutine that has no saved state");	2355	croak ("cannot swap state with coroutine that has no saved state,");
2021	else	2356	else
2022	{	2357	{
2023	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);	2358	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
2024	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;	2359	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
2025		2360
…		…
2050		2385
2051	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2386	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2052	coro_ready[i] = newAV ();	2387	coro_ready[i] = newAV ();
2053		2388
2054	{	2389	{
2055	SV *sv = perl_get_sv ("Coro::API", TRUE);	2390	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2056	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2057		2391
2058	coroapi.schedule = api_schedule;	2392	coroapi.schedule = api_schedule;
2059	coroapi.cede = api_cede;	2393	coroapi.cede = api_cede;
2060	coroapi.cede_notself = api_cede_notself;	2394	coroapi.cede_notself = api_cede_notself;
2061	coroapi.ready = api_ready;	2395	coroapi.ready = api_ready;
2062	coroapi.is_ready = api_is_ready;	2396	coroapi.is_ready = api_is_ready;
2063	coroapi.nready = &coro_nready;	2397	coroapi.nready = coro_nready;
2064	coroapi.current = coro_current;	2398	coroapi.current = coro_current;
2065		2399
2066	GCoroAPI = &coroapi;	2400	GCoroAPI = &coroapi;
2067	sv_setiv (sv, (IV)&coroapi);	2401	sv_setiv (sv, (IV)&coroapi);
2068	SvREADONLY_on (sv);	2402	SvREADONLY_on (sv);
2069	}	2403	}
2070	}	2404	}
		2405
		2406	void
		2407	schedule (...)
		2408	CODE:
		2409	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
		2410
		2411	void
		2412	cede (...)
		2413	CODE:
		2414	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
		2415
		2416	void
		2417	cede_notself (...)
		2418	CODE:
		2419	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2071		2420
2072	void	2421	void
2073	_set_current (SV *current)	2422	_set_current (SV *current)
2074	PROTOTYPE: $	2423	PROTOTYPE: $
2075	CODE:	2424	CODE:
…		…
2085	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2434	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2086	UNLOCK;	2435	UNLOCK;
2087		2436
2088	int	2437	int
2089	prio (Coro::State coro, int newprio = 0)	2438	prio (Coro::State coro, int newprio = 0)
		2439	PROTOTYPE: $;$
2090	ALIAS:	2440	ALIAS:
2091	nice = 1	2441	nice = 1
2092	CODE:	2442	CODE:
2093	{	2443	{
2094	RETVAL = coro->prio;	2444	RETVAL = coro->prio;
…		…
2109		2459
2110	SV *	2460	SV *
2111	ready (SV *self)	2461	ready (SV *self)
2112	PROTOTYPE: $	2462	PROTOTYPE: $
2113	CODE:	2463	CODE:
2114	RETVAL = boolSV (api_ready (self));	2464	RETVAL = boolSV (api_ready (aTHX_ self));
2115	OUTPUT:	2465	OUTPUT:
2116	RETVAL	2466	RETVAL
2117		2467
2118	int	2468	int
2119	nready (...)	2469	nready (...)
…		…
2158	{	2508	{
2159	av_fill (defav, len - 1);	2509	av_fill (defav, len - 1);
2160	for (i = 0; i < len; ++i)	2510	for (i = 0; i < len; ++i)
2161	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2511	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2162	}	2512	}
2163
2164	SvREFCNT_dec (invoke);
2165	}	2513	}
2166		2514
2167	void	2515	void
2168	_pool_2 (SV *cb)	2516	_pool_2 (SV *cb)
2169	CODE:	2517	CODE:
…		…
2173	sv_setsv (cb, &PL_sv_undef);	2521	sv_setsv (cb, &PL_sv_undef);
2174		2522
2175	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;	2523	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
2176	coro->saved_deffh = 0;	2524	coro->saved_deffh = 0;
2177		2525
2178	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2526	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2179	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2527	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2180	{	2528	{
2181	SV *old = PL_diehook;	2529	SV *old = PL_diehook;
2182	PL_diehook = 0;	2530	PL_diehook = 0;
2183	SvREFCNT_dec (old);	2531	SvREFCNT_dec (old);
…		…
2189	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2537	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2190		2538
2191	coro->prio = 0;	2539	coro->prio = 0;
2192		2540
2193	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2541	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2194	api_trace (coro_current, 0);	2542	api_trace (aTHX_ coro_current, 0);
2195		2543
2196	av_push (av_async_pool, newSVsv (coro_current));	2544	av_push (av_async_pool, newSVsv (coro_current));
2197	}	2545	}
2198
2199	#if 0
2200
2201	void
2202	_generator_call (...)
2203	PROTOTYPE: @
2204	PPCODE:
2205	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2206	xxxx
2207	abort ();
2208
2209	SV *
2210	gensub (SV *sub, ...)
2211	PROTOTYPE: &;@
2212	CODE:
2213	{
2214	struct coro *coro;
2215	MAGIC *mg;
2216	CV *xcv;
2217	CV ncv = (CV )newSV_type (SVt_PVCV);
2218	int i;
2219
2220	CvGV (ncv) = CvGV (cv);
2221	CvFILE (ncv) = CvFILE (cv);
2222
2223	Newz (0, coro, 1, struct coro);
2224	coro->args = newAV ();
2225	coro->flags = CF_NEW;
2226
2227	av_extend (coro->args, items - 1);
2228	for (i = 1; i < items; i++)
2229	av_push (coro->args, newSVsv (ST (i)));
2230
2231	CvISXSUB_on (ncv);
2232	CvXSUBANY (ncv).any_ptr = (void *)coro;
2233
2234	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2235
2236	CvXSUB (ncv) = CvXSUB (xcv);
2237	CvANON_on (ncv);
2238
2239	mg = sv_magicext ((SV )ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char )coro, 0);
2240	RETVAL = newRV_noinc ((SV *)ncv);
2241	}
2242	OUTPUT:
2243	RETVAL
2244
2245	#endif
2246		2546
2247		2547
2248	MODULE = Coro::State PACKAGE = Coro::AIO	2548	MODULE = Coro::State PACKAGE = Coro::AIO
2249		2549
2250	void	2550	void
2251	_get_state (SV *self)	2551	_get_state (SV *self)
		2552	PROTOTYPE: $
2252	PPCODE:	2553	PPCODE:
2253	{	2554	{
2254	AV *defav = GvAV (PL_defgv);	2555	AV *defav = GvAV (PL_defgv);
2255	AV *av = newAV ();	2556	AV *av = newAV ();
2256	int i;	2557	int i;
…		…
2271		2572
2272	av_push (av, data_sv);	2573	av_push (av, data_sv);
2273		2574
2274	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2575	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2275		2576
2276	api_ready (self);	2577	api_ready (aTHX_ self);
2277	}	2578	}
2278		2579
2279	void	2580	void
2280	_set_state (SV *state)	2581	_set_state (SV *state)
2281	PROTOTYPE: $	2582	PROTOTYPE: $
…		…
2299	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2600	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2300		2601
2301	BOOT:	2602	BOOT:
2302	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2603	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2303		2604
2304	SV *	2605	void
2305	_schedule (...)	2606	_schedule (...)
2306	PROTOTYPE: @
2307	CODE:	2607	CODE:
2308	{	2608	{
2309	static int incede;	2609	static int incede;
2310		2610
2311	api_cede_notself ();	2611	api_cede_notself (aTHX);
2312		2612
2313	++incede;	2613	++incede;
2314	while (coro_nready >= incede && api_cede ())	2614	while (coro_nready >= incede && api_cede (aTHX))
2315	;	2615	;
2316		2616
2317	sv_setsv (sv_activity, &PL_sv_undef);	2617	sv_setsv (sv_activity, &PL_sv_undef);
2318	if (coro_nready >= incede)	2618	if (coro_nready >= incede)
2319	{	2619	{
…		…
2329		2629
2330	MODULE = Coro::State PACKAGE = PerlIO::cede	2630	MODULE = Coro::State PACKAGE = PerlIO::cede
2331		2631
2332	BOOT:	2632	BOOT:
2333	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2633	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2634
		2635	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2636
		2637	SV *
		2638	new (SV klass, SV count_ = 0)
		2639	CODE:
		2640	{
		2641	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2642	AV *av = newAV ();
		2643	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2644	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2645	}
		2646	OUTPUT:
		2647	RETVAL
		2648
		2649	SV *
		2650	count (SV *self)
		2651	CODE:
		2652	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2653	OUTPUT:
		2654	RETVAL
		2655
		2656	void
		2657	up (SV *self, int adjust = 1)
		2658	ALIAS:
		2659	adjust = 1
		2660	CODE:
		2661	{
		2662	AV av = (AV )SvRV (self);
		2663	SV *count_sv = AvARRAY (av)[0];
		2664	IV count = SvIVX (count_sv);
		2665
		2666	count += ix ? adjust : 1;
		2667	SvIVX (count_sv) = count;
		2668
		2669	/* now wake up as many waiters as possible */
		2670	while (count > 0 && AvFILLp (av) >= count)
		2671	{
		2672	SV *cb;
		2673
		2674	/* swap first two elements so we can shift a waiter */
		2675	AvARRAY (av)[0] = AvARRAY (av)[1];
		2676	AvARRAY (av)[1] = count_sv;
		2677	cb = av_shift (av);
		2678
		2679	if (SvOBJECT (cb))
		2680	api_ready (aTHX_ cb);
		2681	else
		2682	croak ("callbacks not yet supported");
		2683
		2684	SvREFCNT_dec (cb);
		2685	}
		2686	}
		2687
		2688	void
		2689	down (SV *self)
		2690	CODE:
		2691	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
		2692
		2693	void
		2694	try (SV *self)
		2695	PPCODE:
		2696	{
		2697	AV av = (AV )SvRV (self);
		2698	SV *count_sv = AvARRAY (av)[0];
		2699	IV count = SvIVX (count_sv);
		2700
		2701	if (count > 0)
		2702	{
		2703	--count;
		2704	SvIVX (count_sv) = count;
		2705	XSRETURN_YES;
		2706	}
		2707	else
		2708	XSRETURN_NO;
		2709	}
		2710
		2711	void
		2712	waiters (SV *self)
		2713	CODE:
		2714	{
		2715	AV av = (AV )SvRV (self);
		2716
		2717	if (GIMME_V == G_SCALAR)
		2718	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2719	else
		2720	{
		2721	int i;
		2722	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2723	for (i = 1; i <= AvFILLp (av); ++i)
		2724	PUSHs (newSVsv (AvARRAY (av)[i]));
		2725	}
		2726	}
		2727

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Comparing Coro/Coro/State.xs (file contents): Revision 1.249 by root, Tue Sep 30 17:12:35 2008 UTC vs. Revision 1.279 by root, Sun Nov 16 08:59:16 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.249 by root, Tue Sep 30 17:12:35 2008 UTC vs.
Revision 1.279 by root, Sun Nov 16 08:59:16 2008 UTC