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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.254 by root, Fri Nov 7 20:27:47 2008 UTC vs.
Revision 1.272 by root, Fri Nov 14 20:35:49 2008 UTC

…		…
46	# define BOOT_PAGESIZE (void)0	46	# define BOOT_PAGESIZE (void)0
47	#endif	47	#endif
48		48
49	#if CORO_USE_VALGRIND	49	#if CORO_USE_VALGRIND
50	# include <valgrind/valgrind.h>	50	# include <valgrind/valgrind.h>
51	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52	#else
53	# define REGISTER_STACK(cctx,start,end)
54	#endif	51	#endif
55		52
56	/* the maximum number of idle cctx that will be pooled */	53	/* the maximum number of idle cctx that will be pooled */
57	static int cctx_max_idle = 4;	54	static int cctx_max_idle = 4;
58		55
…		…
119	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
120	#endif	117	#endif
121		118
122	/* The next macros try to return the current stack pointer, in an as	119	/* The next macros try to return the current stack pointer, in an as
123	* portable way as possible. */	120	* portable way as possible. */
124	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
125	#define STACKLEVEL ((void *)&stacklevel)	122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
		123	#else
		124	# define dSTACKLEVEL volatile void stacklevel = (volatile void )&stacklevel
		125	#endif
126		126
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		128
129	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
130	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
131	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
133	#else	133	#else
134	# define attribute(x)	134	# define attribute(x)
135	# define BARRIER
136	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
137	#endif	137	#endif
138		138
139	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
140	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
141		141
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_lock;	148	static perl_mutex coro_lock;
148	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)	149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
149	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } 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? */
…		…
169	static struct CoroAPI coroapi;	181	static struct CoroAPI coroapi;
170	static AV main_mainstack; / used to differentiate between $main and others */	182	static AV main_mainstack; / used to differentiate between $main and others */
171	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
172	static HV coro_state_stash, coro_stash;	184	static HV coro_state_stash, coro_stash;
173	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;
174		187
175	static GV irsgv; / $/ */	188	static GV irsgv; / $/ */
176	static GV stdoutgv; / STDOUT /	189	static GV stdoutgv; / STDOUT /
177	static SV *rv_diehook;	190	static SV *rv_diehook;
178	static SV *rv_warnhook;	191	static SV *rv_warnhook;
…		…
197	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
198	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
199	};	212	};
200		213
201	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
202	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
203	struct coro_cctx *next;	217	struct coro_cctx *next;
204		218
205	/* the stack */	219	/* the stack */
206	void *sptr;	220	void *sptr;
207	size_t ssize;	221	size_t ssize;
…		…
225	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
226	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
227	};	241	};
228		242
229	/* 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 */
230	typedef struct {	244	typedef struct
		245	{
231	SV *defsv;	246	SV *defsv;
232	AV *defav;	247	AV *defav;
233	SV *errsv;	248	SV *errsv;
234	SV *irsgv;	249	SV *irsgv;
235	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
237	#undef VAR	252	#undef VAR
238	} perl_slots;	253	} perl_slots;
239		254
240	#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))
241		256
		257	/* this is the per-perl-coro slf frame info */
		258	/* it is treated like other "global" interpreter data */
		259	/* and unfortunately is copied around, so kepe it small */
		260	struct slf_frame
		261	{
		262	void (prepare) (struct coro_transfer_args ta); /* 0 means not yet initialised */
		263	int (*check) (pTHX);
		264	};
		265
242	/* this is a structure representing a perl-level coroutine */	266	/* this is a structure representing a perl-level coroutine */
243	struct coro {	267	struct coro {
244	/* the c coroutine allocated to this perl coroutine, if any */	268	/* the C coroutine allocated to this perl coroutine, if any */
245	coro_cctx *cctx;	269	coro_cctx *cctx;
246		270
247	/* process data */	271	/* process data */
		272	struct slf_frame slf_frame; /* saved slf frame */
		273	void *slf_data;
248	AV *mainstack;	274	AV *mainstack;
249	perl_slots slot; / basically the saved sp */	275	perl_slots slot; / basically the saved sp */
250		276
251	AV args; / data associated with this coroutine (initial args) */	277	AV args; / data associated with this coroutine (initial args) */
252	int refcnt; /* coroutines are refcounted, yes */	278	int refcnt; /* coroutines are refcounted, yes */
…		…
267	struct coro next, prev;	293	struct coro next, prev;
268	};	294	};
269		295
270	typedef struct coro *Coro__State;	296	typedef struct coro *Coro__State;
271	typedef struct coro *Coro__State_or_hashref;	297	typedef struct coro *Coro__State_or_hashref;
		298
		299	static struct slf_frame slf_frame; /* the current slf frame */
272		300
273	/ Coro ******************************************************************/	301	/ Coro ******************************************************************/
274		302
275	#define PRIO_MAX 3	303	#define PRIO_MAX 3
276	#define PRIO_HIGH 1	304	#define PRIO_HIGH 1
…		…
280	#define PRIO_MIN -4	308	#define PRIO_MIN -4
281		309
282	/* for Coro.pm */	310	/* for Coro.pm */
283	static SV *coro_current;	311	static SV *coro_current;
284	static SV *coro_readyhook;	312	static SV *coro_readyhook;
285	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	313	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
286	static int coro_nready;
287	static struct coro *coro_first;	314	static struct coro *coro_first;
		315	#define coro_nready coroapi.nready
288		316
289	/ lowlevel stuff ********************************************************/	317	/ lowlevel stuff ********************************************************/
290		318
291	static SV *	319	static SV *
292	coro_get_sv (pTHX_ const char *name, int create)	320	coro_get_sv (pTHX_ const char *name, int create)
…		…
395	: 0	423	: 0
396		424
397	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	425	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
398	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	426	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
399		427
400	static struct coro *	428	INLINE struct coro *
401	SvSTATE_ (pTHX_ SV *coro)	429	SvSTATE_ (pTHX_ SV *coro)
402	{	430	{
403	HV *stash;	431	HV *stash;
404	MAGIC *mg;	432	MAGIC *mg;
405		433
…		…
496	CvPADLIST (cv) = (AV *)POPs;	524	CvPADLIST (cv) = (AV *)POPs;
497	}	525	}
498		526
499	PUTBACK;	527	PUTBACK;
500	}	528	}
		529
		530	slf_frame = c->slf_frame;
		531	coroapi.slf_data = c->slf_data;
501	}	532	}
502		533
503	static void	534	static void
504	save_perl (pTHX_ Coro__State c)	535	save_perl (pTHX_ Coro__State c)
505	{	536	{
		537	c->slf_data = coroapi.slf_data;
		538	c->slf_frame = slf_frame;
		539
506	{	540	{
507	dSP;	541	dSP;
508	I32 cxix = cxstack_ix;	542	I32 cxix = cxstack_ix;
509	PERL_CONTEXT *ccstk = cxstack;	543	PERL_CONTEXT *ccstk = cxstack;
510	PERL_SI *top_si = PL_curstackinfo;	544	PERL_SI *top_si = PL_curstackinfo;
…		…
577	#undef VAR	611	#undef VAR
578	}	612	}
579	}	613	}
580		614
581	/*	615	/*
582	* allocate various perl stacks. This is an exact copy	616	* allocate various perl stacks. This is almost an exact copy
583	* of perl.c:init_stacks, except that it uses less memory	617	* of perl.c:init_stacks, except that it uses less memory
584	* on the (sometimes correct) assumption that coroutines do	618	* on the (sometimes correct) assumption that coroutines do
585	* not usually need a lot of stackspace.	619	* not usually need a lot of stackspace.
586	*/	620	*/
587	#if CORO_PREFER_PERL_FUNCTIONS	621	#if CORO_PREFER_PERL_FUNCTIONS
…		…
789		823
790	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	824	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
791	}	825	}
792		826
793	static void	827	static void
		828	prepare_nop (aTHX_ struct coro_transfer_args *ta)
		829	{
		830	/* kind of mega-hacky, but works */
		831	ta->next = ta->prev = (struct coro *)ta;
		832	}
		833
		834	static int
		835	slf_check_nop (aTHX)
		836	{
		837	return 0;
		838	}
		839
		840	static void
794	coro_setup (pTHX_ struct coro *coro)	841	coro_setup (pTHX_ struct coro *coro)
795	{	842	{
796	/*	843	/*
797	* emulate part of the perl startup here.	844	* emulate part of the perl startup here.
798	*/	845	*/
…		…
822	PL_rs = newSVsv (GvSV (irsgv));	869	PL_rs = newSVsv (GvSV (irsgv));
823	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	870	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
824		871
825	{	872	{
826	dSP;	873	dSP;
827	LOGOP myop;	874	UNOP myop;
828		875
829	Zero (&myop, 1, LOGOP);	876	Zero (&myop, 1, UNOP);
830	myop.op_next = Nullop;	877	myop.op_next = Nullop;
831	myop.op_flags = OPf_WANT_VOID;	878	myop.op_flags = OPf_WANT_VOID;
832		879
833	PUSHMARK (SP);	880	PUSHMARK (SP);
834	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	881	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
837	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	884	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
838	SPAGAIN;	885	SPAGAIN;
839	}	886	}
840		887
841	/* this newly created coroutine might be run on an existing cctx which most	888	/* this newly created coroutine might be run on an existing cctx which most
842	* likely was suspended in set_stacklevel, called from entersub.	889	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
843	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
844	* so we ENTER here for symmetry
845	*/	890	*/
846	ENTER;	891	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		892	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
847	}	893	}
848		894
849	static void	895	static void
850	coro_destruct (pTHX_ struct coro *coro)	896	coro_destruct (pTHX_ struct coro *coro)
851	{	897	{
…		…
880	SvREFCNT_dec (coro->throw);	926	SvREFCNT_dec (coro->throw);
881		927
882	coro_destruct_stacks (aTHX);	928	coro_destruct_stacks (aTHX);
883	}	929	}
884		930
885	static void	931	INLINE void
886	free_coro_mortal (pTHX)	932	free_coro_mortal (pTHX)
887	{	933	{
888	if (expect_true (coro_mortal))	934	if (expect_true (coro_mortal))
889	{	935	{
890	SvREFCNT_dec (coro_mortal);	936	SvREFCNT_dec (coro_mortal);
…		…
1014		1060
1015	TAINT_NOT;	1061	TAINT_NOT;
1016	return 0;	1062	return 0;
1017	}	1063	}
1018		1064
		1065	static void
		1066	prepare_set_stacklevel (struct coro_transfer_args ta, struct coro_cctx cctx)
		1067	{
		1068	ta->prev = (struct coro *)cctx;
		1069	ta->next = 0;
		1070	}
		1071
1019	/* inject a fake call to Coro::State::_cctx_init into the execution */	1072	/* inject a fake call to Coro::State::_cctx_init into the execution */
1020	/* _cctx_init should be careful, as it could be called at almost any time */	1073	/* _cctx_init should be careful, as it could be called at almost any time */
1021	/* during execution of a perl program */	1074	/* during execution of a perl program */
		1075	/* also initialises PL_top_env */
1022	static void NOINLINE	1076	static void NOINLINE
1023	cctx_prepare (pTHX_ coro_cctx *cctx)	1077	cctx_prepare (pTHX_ coro_cctx *cctx)
1024	{	1078	{
1025	dSP;	1079	dSP;
1026	LOGOP myop;	1080	UNOP myop;
1027		1081
1028	PL_top_env = &PL_start_env;	1082	PL_top_env = &PL_start_env;
1029		1083
1030	if (cctx->flags & CC_TRACE)	1084	if (cctx->flags & CC_TRACE)
1031	PL_runops = runops_trace;	1085	PL_runops = runops_trace;
1032		1086
1033	Zero (&myop, 1, LOGOP);	1087	Zero (&myop, 1, UNOP);
1034	myop.op_next = PL_op;	1088	myop.op_next = PL_op;
1035	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	1089	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
1036		1090
1037	PUSHMARK (SP);	1091	PUSHMARK (SP);
1038	EXTEND (SP, 2);	1092	EXTEND (SP, 2);
1039	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1093	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1040	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1094	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1041	PUTBACK;	1095	PUTBACK;
1042	PL_op = (OP *)&myop;	1096	PL_op = (OP *)&myop;
1043	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1097	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1044	SPAGAIN;	1098	SPAGAIN;
1045	}	1099	}
1046		1100
		1101	/* the tail of transfer: execute stuff we can only do after a transfer */
		1102	INLINE void
		1103	transfer_tail (pTHX)
		1104	{
		1105	struct coro next = (struct coro )transfer_next;
		1106	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
		1107	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
		1108
		1109	free_coro_mortal (aTHX);
		1110	UNLOCK;
		1111
		1112	if (expect_false (next->throw))
		1113	{
		1114	SV *exception = sv_2mortal (next->throw);
		1115
		1116	next->throw = 0;
		1117	sv_setsv (ERRSV, exception);
		1118	croak (0);
		1119	}
		1120	}
		1121
1047	/*	1122	/*
1048	* this is a _very_ stripped down perl interpreter ;)	1123	* this is a _very_ stripped down perl interpreter ;)
1049	*/	1124	*/
1050	static void	1125	static void
1051	cctx_run (void *arg)	1126	cctx_run (void *arg)
1052	{	1127	{
		1128	#ifdef USE_ITHREADS
		1129	# if CORO_PTHREAD
		1130	PERL_SET_CONTEXT (coro_thx);
		1131	# endif
		1132	#endif
		1133	{
1053	dTHX;	1134	dTHX;
1054		1135
1055	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1136	/* normally we would need to skip the entersub here */
1056	UNLOCK;	1137	/* not doing so will re-execute it, which is exactly what we want */
1057
1058	/* we now skip the entersub that lead to transfer() */
1059	PL_op = PL_op->op_next;	1138	/* PL_nop = PL_nop->op_next */
1060		1139
1061	/* inject a fake subroutine call to cctx_init */	1140	/* inject a fake subroutine call to cctx_init */
1062	cctx_prepare (aTHX_ (coro_cctx *)arg);	1141	cctx_prepare (aTHX_ (coro_cctx *)arg);
1063		1142
		1143	/* cctx_run is the alternative tail of transfer() */
		1144	/* TODO: throwing an exception here might be deadly, VERIFY */
		1145	transfer_tail (aTHX);
		1146
1064	/* somebody or something will hit me for both perl_run and PL_restartop */	1147	/* somebody or something will hit me for both perl_run and PL_restartop */
1065	PL_restartop = PL_op;	1148	PL_restartop = PL_op;
1066	perl_run (PL_curinterp);	1149	perl_run (PL_curinterp);
1067		1150
1068	/*	1151	/*
1069	* If perl-run returns we assume exit() was being called or the coro	1152	* If perl-run returns we assume exit() was being called or the coro
1070	* fell off the end, which seems to be the only valid (non-bug)	1153	* fell off the end, which seems to be the only valid (non-bug)
1071	* reason for perl_run to return. We try to exit by jumping to the	1154	* reason for perl_run to return. We try to exit by jumping to the
1072	* bootstrap-time "top" top_env, as we cannot restore the "main"	1155	* bootstrap-time "top" top_env, as we cannot restore the "main"
1073	* coroutine as Coro has no such concept	1156	* coroutine as Coro has no such concept
1074	*/	1157	*/
1075	PL_top_env = main_top_env;	1158	PL_top_env = main_top_env;
1076	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */	1159	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1160	}
1077	}	1161	}
1078		1162
1079	static coro_cctx *	1163	static coro_cctx *
1080	cctx_new ()	1164	cctx_new ()
1081	{	1165	{
1082	coro_cctx *cctx;	1166	coro_cctx *cctx;
		1167
		1168	++cctx_count;
		1169	New (0, cctx, 1, coro_cctx);
		1170
		1171	cctx->gen = cctx_gen;
		1172	cctx->flags = 0;
		1173	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1174
		1175	return cctx;
		1176	}
		1177
		1178	/* create a new cctx only suitable as source */
		1179	static coro_cctx *
		1180	cctx_new_empty ()
		1181	{
		1182	coro_cctx *cctx = cctx_new ();
		1183
		1184	cctx->sptr = 0;
		1185	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1186
		1187	return cctx;
		1188	}
		1189
		1190	/* create a new cctx suitable as destination/running a perl interpreter */
		1191	static coro_cctx *
		1192	cctx_new_run ()
		1193	{
		1194	coro_cctx *cctx = cctx_new ();
1083	void *stack_start;	1195	void *stack_start;
1084	size_t stack_size;	1196	size_t stack_size;
1085
1086	++cctx_count;
1087	Newz (0, cctx, 1, coro_cctx);
1088
1089	cctx->gen = cctx_gen;
1090		1197
1091	#if HAVE_MMAP	1198	#if HAVE_MMAP
1092	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1199	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1093	/* mmap supposedly does allocate-on-write for us */	1200	/* mmap supposedly does allocate-on-write for us */
1094	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1201	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
1095		1202
1096	if (cctx->sptr != (void *)-1)	1203	if (cctx->sptr != (void *)-1)
1097	{	1204	{
1098	# if CORO_STACKGUARD	1205	#if CORO_STACKGUARD
1099	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1206	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1100	# endif	1207	#endif
1101	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1208	stack_start = (char )cctx->sptr + CORO_STACKGUARD PAGESIZE;
1102	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1209	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1103	cctx->flags \|= CC_MAPPED;	1210	cctx->flags \|= CC_MAPPED;
1104	}	1211	}
1105	else	1212	else
1106	#endif	1213	#endif
1107	{	1214	{
1108	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1215	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1109	New (0, cctx->sptr, cctx_stacksize, long);	1216	New (0, cctx->sptr, cctx_stacksize, long);
1110		1217
1111	if (!cctx->sptr)	1218	if (!cctx->sptr)
1112	{	1219	{
1113	perror ("FATAL: unable to allocate stack for coroutine");	1220	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1114	_exit (EXIT_FAILURE);	1221	_exit (EXIT_FAILURE);
1115	}	1222	}
1116		1223
1117	stack_start = cctx->sptr;	1224	stack_start = cctx->sptr;
1118	stack_size = cctx->ssize;	1225	stack_size = cctx->ssize;
1119	}	1226	}
1120		1227
1121	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);	1228	#if CORO_USE_VALGRIND
		1229	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char )stack_start, (char )stack_start + stack_size);
		1230	#endif
		1231
1122	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1232	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1123		1233
1124	return cctx;	1234	return cctx;
1125	}	1235	}
1126		1236
…		…
1134	coro_destroy (&cctx->cctx);	1244	coro_destroy (&cctx->cctx);
1135		1245
1136	/* coro_transfer creates new, empty cctx's */	1246	/* coro_transfer creates new, empty cctx's */
1137	if (cctx->sptr)	1247	if (cctx->sptr)
1138	{	1248	{
1139	#if CORO_USE_VALGRIND	1249	#if CORO_USE_VALGRIND
1140	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1250	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1141	#endif	1251	#endif
1142		1252
1143	#if HAVE_MMAP	1253	#if HAVE_MMAP
1144	if (cctx->flags & CC_MAPPED)	1254	if (cctx->flags & CC_MAPPED)
1145	munmap (cctx->sptr, cctx->ssize);	1255	munmap (cctx->sptr, cctx->ssize);
1146	else	1256	else
…		…
1167	return cctx;	1277	return cctx;
1168		1278
1169	cctx_destroy (cctx);	1279	cctx_destroy (cctx);
1170	}	1280	}
1171		1281
1172	return cctx_new ();	1282	return cctx_new_run ();
1173	}	1283	}
1174		1284
1175	static void	1285	static void
1176	cctx_put (coro_cctx *cctx)	1286	cctx_put (coro_cctx *cctx)
1177	{	1287	{
1178	assert (("cctx_put called on non-initialised cctx", cctx->sptr));	1288	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1179		1289
1180	/* free another cctx if overlimit */	1290	/* free another cctx if overlimit */
1181	if (expect_false (cctx_idle >= cctx_max_idle))	1291	if (expect_false (cctx_idle >= cctx_max_idle))
1182	{	1292	{
1183	coro_cctx *first = cctx_first;	1293	coro_cctx *first = cctx_first;
…		…
1222	dSTACKLEVEL;	1332	dSTACKLEVEL;
1223		1333
1224	/* sometimes transfer is only called to set idle_sp */	1334	/* sometimes transfer is only called to set idle_sp */
1225	if (expect_false (!next))	1335	if (expect_false (!next))
1226	{	1336	{
1227	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1337	((coro_cctx *)prev)->idle_sp = stacklevel;
1228	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */	1338	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
1229	}	1339	}
1230	else if (expect_true (prev != next))	1340	else if (expect_true (prev != next))
1231	{	1341	{
1232	static volatile int has_throw;
1233	coro_cctx *prev__cctx;	1342	coro_cctx *prev__cctx;
1234		1343
1235	if (expect_false (prev->flags & CF_NEW))	1344	if (expect_false (prev->flags & CF_NEW))
1236	{	1345	{
1237	/* create a new empty/source context */	1346	/* create a new empty/source context */
1238	++cctx_count;	1347	prev->cctx = cctx_new_empty ();
1239	New (0, prev->cctx, 1, coro_cctx);
1240	prev->cctx->sptr = 0;
1241	coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1242
1243	prev->flags &= ~CF_NEW;	1348	prev->flags &= ~CF_NEW;
1244	prev->flags \|= CF_RUNNING;	1349	prev->flags \|= CF_RUNNING;
1245	}	1350	}
1246		1351
1247	prev->flags &= ~CF_RUNNING;	1352	prev->flags &= ~CF_RUNNING;
…		…
1262	else	1367	else
1263	load_perl (aTHX_ next);	1368	load_perl (aTHX_ next);
1264		1369
1265	prev__cctx = prev->cctx;	1370	prev__cctx = prev->cctx;
1266		1371
1267	/* possibly "free" the cctx */	1372	/* possibly untie and reuse the cctx */
1268	if (expect_true (	1373	if (expect_true (
1269	prev__cctx->idle_sp == STACKLEVEL	1374	prev__cctx->idle_sp == stacklevel
1270	&& !(prev__cctx->flags & CC_TRACE)	1375	&& !(prev__cctx->flags & CC_TRACE)
1271	&& !force_cctx	1376	&& !force_cctx
1272	))	1377	))
1273	{	1378	{
1274	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1379	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1275	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1380	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1276		1381
1277	prev->cctx = 0;	1382	prev->cctx = 0;
1278		1383
1279	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1384	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1280	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1385	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1288	++next->usecount;	1393	++next->usecount;
1289		1394
1290	if (expect_true (!next->cctx))	1395	if (expect_true (!next->cctx))
1291	next->cctx = cctx_get (aTHX);	1396	next->cctx = cctx_get (aTHX);
1292		1397
1293	has_throw = !!next->throw;	1398	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1399	transfer_next = next;
1294		1400
1295	if (expect_false (prev__cctx != next->cctx))	1401	if (expect_false (prev__cctx != next->cctx))
1296	{	1402	{
1297	prev__cctx->top_env = PL_top_env;	1403	prev__cctx->top_env = PL_top_env;
1298	PL_top_env = next->cctx->top_env;	1404	PL_top_env = next->cctx->top_env;
1299	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1405	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1300	}	1406	}
1301		1407
1302	free_coro_mortal (aTHX);	1408	transfer_tail (aTHX);
1303	UNLOCK;
1304
1305	if (expect_false (has_throw))
1306	{
1307	struct coro *coro = SvSTATE (coro_current);
1308
1309	if (coro->throw)
1310	{
1311	SV *exception = coro->throw;
1312	coro->throw = 0;
1313	sv_setsv (ERRSV, exception);
1314	croak (0);
1315	}
1316	}
1317	}	1409	}
1318	}	1410	}
1319
1320	struct transfer_args
1321	{
1322	struct coro prev, next;
1323	};
1324		1411
1325	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1412	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1326	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1413	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1327		1414
1328	/ high level stuff ******************************************************/	1415	/ high level stuff ******************************************************/
…		…
1410	# define MGf_DUP 0	1497	# define MGf_DUP 0
1411	#endif	1498	#endif
1412	};	1499	};
1413		1500
1414	static void	1501	static void
1415	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)	1502	prepare_transfer (pTHX_ struct coro_transfer_args ta, SV prev_sv, SV *next_sv)
1416	{	1503	{
1417	ta->prev = SvSTATE (prev_sv);	1504	ta->prev = SvSTATE (prev_sv);
1418	ta->next = SvSTATE (next_sv);	1505	ta->next = SvSTATE (next_sv);
1419	TRANSFER_CHECK (*ta);	1506	TRANSFER_CHECK (*ta);
1420	}	1507	}
1421		1508
1422	static void	1509	static void
1423	api_transfer (SV prev_sv, SV next_sv)	1510	api_transfer (pTHX_ SV prev_sv, SV next_sv)
1424	{	1511	{
1425	dTHX;
1426	struct transfer_args ta;	1512	struct coro_transfer_args ta;
1427		1513
1428	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1514	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1429	TRANSFER (ta, 1);	1515	TRANSFER (ta, 1);
1430	}	1516	}
1431		1517
…		…
1448		1534
1449	return 0;	1535	return 0;
1450	}	1536	}
1451		1537
1452	static int	1538	static int
1453	api_ready (SV *coro_sv)	1539	api_ready (pTHX_ SV *coro_sv)
1454	{	1540	{
1455	dTHX;
1456	struct coro *coro;	1541	struct coro *coro;
1457	SV *sv_hook;	1542	SV *sv_hook;
1458	void (*xs_hook)(void);	1543	void (*xs_hook)(void);
1459		1544
1460	if (SvROK (coro_sv))	1545	if (SvROK (coro_sv))
…		…
1498		1583
1499	return 1;	1584	return 1;
1500	}	1585	}
1501		1586
1502	static int	1587	static int
1503	api_is_ready (SV *coro_sv)	1588	api_is_ready (pTHX_ SV *coro_sv)
1504	{	1589	{
1505	dTHX;
1506	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1590	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1507	}	1591	}
1508		1592
1509	static void	1593	INLINE void
1510	prepare_schedule (pTHX_ struct transfer_args *ta)	1594	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1511	{	1595	{
1512	SV prev_sv, next_sv;	1596	SV prev_sv, next_sv;
1513		1597
1514	for (;;)	1598	for (;;)
1515	{	1599	{
…		…
1540	/* cannot transfer to destroyed coros, skip and look for next */	1624	/* cannot transfer to destroyed coros, skip and look for next */
1541	if (expect_false (ta->next->flags & CF_DESTROYED))	1625	if (expect_false (ta->next->flags & CF_DESTROYED))
1542	{	1626	{
1543	UNLOCK;	1627	UNLOCK;
1544	SvREFCNT_dec (next_sv);	1628	SvREFCNT_dec (next_sv);
1545	/* coro_nready is already taken care of by destroy */	1629	/* coro_nready has already been taken care of by destroy */
1546	continue;	1630	continue;
1547	}	1631	}
1548		1632
1549	--coro_nready;	1633	--coro_nready;
1550	UNLOCK;	1634	UNLOCK;
…		…
1553		1637
1554	/* free this only after the transfer */	1638	/* free this only after the transfer */
1555	prev_sv = SvRV (coro_current);	1639	prev_sv = SvRV (coro_current);
1556	ta->prev = SvSTATE (prev_sv);	1640	ta->prev = SvSTATE (prev_sv);
1557	TRANSFER_CHECK (*ta);	1641	TRANSFER_CHECK (*ta);
1558	assert (ta->next->flags & CF_READY);	1642	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1559	ta->next->flags &= ~CF_READY;	1643	ta->next->flags &= ~CF_READY;
1560	SvRV_set (coro_current, next_sv);	1644	SvRV_set (coro_current, next_sv);
1561		1645
1562	LOCK;	1646	LOCK;
1563	free_coro_mortal (aTHX);	1647	free_coro_mortal (aTHX);
1564	coro_mortal = prev_sv;	1648	coro_mortal = prev_sv;
1565	UNLOCK;	1649	UNLOCK;
1566	}	1650	}
1567		1651
		1652	INLINE void
		1653	prepare_cede (pTHX_ struct coro_transfer_args *ta)
		1654	{
		1655	api_ready (aTHX_ coro_current);
		1656	prepare_schedule (aTHX_ ta);
		1657	}
		1658
		1659	INLINE void
		1660	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1661	{
		1662	SV *prev = SvRV (coro_current);
		1663
		1664	if (coro_nready)
		1665	{
		1666	prepare_schedule (aTHX_ ta);
		1667	api_ready (aTHX_ prev);
		1668	}
		1669	else
		1670	prepare_nop (aTHX_ ta);
		1671	}
		1672
1568	static void	1673	static void
1569	prepare_cede (pTHX_ struct transfer_args *ta)	1674	api_schedule (pTHX)
1570	{	1675	{
1571	api_ready (coro_current);	1676	struct coro_transfer_args ta;
		1677
1572	prepare_schedule (aTHX_ ta);	1678	prepare_schedule (aTHX_ &ta);
		1679	TRANSFER (ta, 1);
1573	}	1680	}
1574		1681
1575	static int	1682	static int
1576	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1683	api_cede (pTHX)
1577	{	1684	{
1578	if (coro_nready)	1685	struct coro_transfer_args ta;
1579	{	1686
1580	SV *prev = SvRV (coro_current);
1581	prepare_schedule (aTHX_ ta);	1687	prepare_cede (aTHX_ &ta);
1582	api_ready (prev);	1688
		1689	if (expect_true (ta.prev != ta.next))
		1690	{
		1691	TRANSFER (ta, 1);
1583	return 1;	1692	return 1;
1584	}	1693	}
1585	else	1694	else
1586	return 0;	1695	return 0;
1587	}	1696	}
1588		1697
1589	static void
1590	api_schedule (void)
1591	{
1592	dTHX;
1593	struct transfer_args ta;
1594
1595	prepare_schedule (aTHX_ &ta);
1596	TRANSFER (ta, 1);
1597	}
1598
1599	static int	1698	static int
1600	api_cede (void)	1699	api_cede_notself (pTHX)
1601	{	1700	{
1602	dTHX;	1701	if (coro_nready)
		1702	{
1603	struct transfer_args ta;	1703	struct coro_transfer_args ta;
1604		1704
1605	prepare_cede (aTHX_ &ta);	1705	prepare_cede_notself (aTHX_ &ta);
1606
1607	if (expect_true (ta.prev != ta.next))
1608	{
1609	TRANSFER (ta, 1);	1706	TRANSFER (ta, 1);
1610	return 1;	1707	return 1;
1611	}	1708	}
1612	else	1709	else
1613	return 0;	1710	return 0;
1614	}	1711	}
1615		1712
1616	static int
1617	api_cede_notself (void)
1618	{
1619	dTHX;
1620	struct transfer_args ta;
1621
1622	if (prepare_cede_notself (aTHX_ &ta))
1623	{
1624	TRANSFER (ta, 1);
1625	return 1;
1626	}
1627	else
1628	return 0;
1629	}
1630
1631	static void	1713	static void
1632	api_trace (SV *coro_sv, int flags)	1714	api_trace (pTHX_ SV *coro_sv, int flags)
1633	{	1715	{
1634	dTHX;
1635	struct coro *coro = SvSTATE (coro_sv);	1716	struct coro *coro = SvSTATE (coro_sv);
1636		1717
1637	if (flags & CC_TRACE)	1718	if (flags & CC_TRACE)
1638	{	1719	{
1639	if (!coro->cctx)	1720	if (!coro->cctx)
1640	coro->cctx = cctx_new ();	1721	coro->cctx = cctx_new_run ();
1641	else if (!(coro->cctx->flags & CC_TRACE))	1722	else if (!(coro->cctx->flags & CC_TRACE))
1642	croak ("cannot enable tracing on coroutine with custom stack");	1723	croak ("cannot enable tracing on coroutine with custom stack");
1643		1724
1644	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));	1725	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
1645	}	1726	}
…		…
1652	else	1733	else
1653	coro->slot->runops = RUNOPS_DEFAULT;	1734	coro->slot->runops = RUNOPS_DEFAULT;
1654	}	1735	}
1655	}	1736	}
1656		1737
		1738	#if 0
1657	static int	1739	static int
1658	coro_gensub_free (pTHX_ SV sv, MAGIC mg)	1740	coro_gensub_free (pTHX_ SV sv, MAGIC mg)
1659	{	1741	{
1660	AV *padlist;	1742	AV *padlist;
1661	AV av = (AV )mg->mg_obj;	1743	AV av = (AV )mg->mg_obj;
…		…
1667		1749
1668	static MGVTBL coro_gensub_vtbl = {	1750	static MGVTBL coro_gensub_vtbl = {
1669	0, 0, 0, 0,	1751	0, 0, 0, 0,
1670	coro_gensub_free	1752	coro_gensub_free
1671	};	1753	};
		1754	#endif
1672		1755
1673	/*****************************************************************************/	1756	/*****************************************************************************/
1674	/* PerlIO::cede */	1757	/* PerlIO::cede */
1675		1758
1676	typedef struct	1759	typedef struct
…		…
1704	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1787	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1705	double now = nvtime ();	1788	double now = nvtime ();
1706		1789
1707	if (now >= self->next)	1790	if (now >= self->next)
1708	{	1791	{
1709	api_cede ();	1792	api_cede (aTHX);
1710	self->next = now + self->every;	1793	self->next = now + self->every;
1711	}	1794	}
1712		1795
1713	return PerlIOBuf_flush (aTHX_ f);	1796	return PerlIOBuf_flush (aTHX_ f);
1714	}	1797	}
…		…
1743	PerlIOBuf_get_ptr,	1826	PerlIOBuf_get_ptr,
1744	PerlIOBuf_get_cnt,	1827	PerlIOBuf_get_cnt,
1745	PerlIOBuf_set_ptrcnt,	1828	PerlIOBuf_set_ptrcnt,
1746	};	1829	};
1747		1830
		1831	/*****************************************************************************/
		1832
		1833	static const CV slf_cv; / for quick consistency check */
		1834
		1835	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1836	static SV *slf_arg0;
		1837	static SV *slf_arg1;
		1838
		1839	/* this restores the stack in the case we patched the entersub, to */
		1840	/* recreate the stack frame as perl will on following calls */
		1841	/* since entersub cleared the stack */
		1842	static OP *
		1843	pp_restore (pTHX)
		1844	{
		1845	dSP;
		1846
		1847	PUSHMARK (SP);
		1848
		1849	EXTEND (SP, 3);
		1850	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1851	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1852	PUSHs ((SV *)CvGV (slf_cv));
		1853
		1854	RETURNOP (slf_restore.op_first);
		1855	}
		1856
		1857	static void
		1858	slf_init_set_stacklevel (pTHX_ SV **arg, int items)
		1859	{
		1860	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1861	CORO_SLF_DATA = (void *)SvIV (arg [0]);
		1862	}
		1863
		1864	static void
		1865	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1866	{
		1867	prepare_set_stacklevel (ta, (struct coro_cctx *)CORO_SLF_DATA);
		1868	}
		1869
		1870	static void
		1871	slf_init_transfer (pTHX_ SV **arg, int items)
		1872	{
		1873	if (items != 2)
		1874	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
		1875
		1876	CORO_SLF_DATA = (void )arg; / let's hope it will stay valid */
		1877	}
		1878
		1879	static void
		1880	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1881	{
		1882	SV arg = (SV )CORO_SLF_DATA;
		1883
		1884	prepare_transfer (ta, arg [0], arg [1]);
		1885	}
		1886
		1887	static void
		1888	slf_init_nop (pTHX_ SV **arg, int items)
		1889	{
		1890	}
		1891
		1892	/* slf_prepare_schedule == prepare_schedule */
		1893	/* slf_prepare_cede == prepare_cede */
		1894	/* slf_prepare_notself == prepare_notself */
		1895
		1896	/* we hijack an hopefully unused CV flag for our purposes */
		1897	#define CVf_SLF 0x4000
		1898
		1899	/*
		1900	* these not obviously related functions are all rolled into one
		1901	* function to increase chances that they all will call transfer with the same
		1902	* stack offset
		1903	* SLF stands for "schedule-like-function".
		1904	*/
		1905	static OP *
		1906	pp_slf (pTHX)
		1907	{
		1908	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1909
		1910	if (expect_true (!slf_frame.prepare))
		1911	{
		1912	/* first iteration */
		1913	dSP;
		1914	SV **arg = PL_stack_base + TOPMARK + 1;
		1915	int items = SP - arg; /* args without function object */
		1916	SV gv = sp;
		1917	struct CoroSLF *slf;
		1918
		1919	/* do a quick consistency check on the "function" object, and if it isn't */
		1920	/* for us, divert to the real entersub */
		1921	if (SvTYPE (gv) != SVt_PVGV \|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1922	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1923
		1924	/* pop args */
		1925	SP = PL_stack_base + POPMARK;
		1926
		1927	if (!(PL_op->op_flags & OPf_STACKED))
		1928	{
		1929	/* ampersand-form of call, use @_ instead of stack */
		1930	AV *av = GvAV (PL_defgv);
		1931	arg = AvARRAY (av);
		1932	items = AvFILLp (av) + 1;
		1933	}
		1934
		1935	PUTBACK;
		1936
		1937	slf = (struct CoroSLF *)CvXSUBANY (GvCV (gv)).any_ptr;
		1938	slf_frame.prepare = slf->prepare;
		1939	slf_frame.check = slf->check;
		1940	slf->init (aTHX_ arg, items);
		1941	}
		1942
		1943	/* now interpret the slf_frame */
		1944	/* we use a callback system not to make the code needlessly */
		1945	/* complicated, but so we can run multiple perl coros from one cctx */
		1946
		1947	do
		1948	{
		1949	struct coro_transfer_args ta;
		1950
		1951	slf_frame.prepare (aTHX_ &ta);
		1952	TRANSFER (ta, 0);
		1953
		1954	checkmark = PL_stack_sp - PL_stack_base;
		1955	}
		1956	while (slf_frame.check (aTHX));
		1957
		1958	{
		1959	dSP;
		1960	SV **bot = PL_stack_base + checkmark;
		1961	int gimme = GIMME_V;
		1962
		1963	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
		1964
		1965	/* make sure we put something on the stack in scalar context */
		1966	if (gimme == G_SCALAR)
		1967	{
		1968	if (sp == bot)
		1969	XPUSHs (&PL_sv_undef);
		1970
		1971	SP = bot + 1;
		1972	}
		1973
		1974	PUTBACK;
		1975	}
		1976
		1977	return NORMAL;
		1978	}
		1979
		1980	static void
		1981	api_execute_slf (pTHX_ CV cv, const struct CoroSLF slf, SV **arg, int items)
		1982	{
		1983	assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
		1984	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1985
		1986	if (items > 2)
		1987	croak ("Coro only supports a max of two arguments to SLF functions.");
		1988
		1989	CvFLAGS (cv) \|= CVf_SLF;
		1990	CvXSUBANY (cv).any_ptr = (void *)slf;
		1991	slf_cv = cv;
		1992
		1993	/* we patch the op, and then re-run the whole call */
		1994	/* we have to put the same argument on the stack for this to work */
		1995	/* and this will be done by pp_restore */
		1996	slf_restore.op_next = (OP *)&slf_restore;
		1997	slf_restore.op_type = OP_NULL;
		1998	slf_restore.op_ppaddr = pp_restore;
		1999	slf_restore.op_first = PL_op;
		2000
		2001	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		2002	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		2003
		2004	PL_op->op_ppaddr = pp_slf;
		2005
		2006	PL_op = (OP *)&slf_restore;
		2007	}
1748		2008
1749	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2009	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1750		2010
1751	PROTOTYPES: DISABLE	2011	PROTOTYPES: DISABLE
1752		2012
1753	BOOT:	2013	BOOT:
1754	{	2014	{
1755	#ifdef USE_ITHREADS	2015	#ifdef USE_ITHREADS
1756	MUTEX_INIT (&coro_lock);	2016	MUTEX_INIT (&coro_lock);
		2017	# if CORO_PTHREAD
		2018	coro_thx = PERL_GET_CONTEXT;
		2019	# endif
1757	#endif	2020	#endif
1758	BOOT_PAGESIZE;	2021	BOOT_PAGESIZE;
1759		2022
1760	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);	2023	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
1761	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);	2024	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
…		…
1779	main_top_env = PL_top_env;	2042	main_top_env = PL_top_env;
1780		2043
1781	while (main_top_env->je_prev)	2044	while (main_top_env->je_prev)
1782	main_top_env = main_top_env->je_prev;	2045	main_top_env = main_top_env->je_prev;
1783		2046
1784	coroapi.ver = CORO_API_VERSION;	2047	coroapi.ver = CORO_API_VERSION;
1785	coroapi.rev = CORO_API_REVISION;	2048	coroapi.rev = CORO_API_REVISION;
1786	coroapi.transfer = api_transfer;	2049	coroapi.transfer = api_transfer;
		2050	coroapi.execute_slf = api_execute_slf;
		2051	coroapi.sv_state = SvSTATE_;
1787		2052
1788	{	2053	{
1789	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2054	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1790		2055
1791	if (!svp) croak ("Time::HiRes is required");	2056	if (!svp) croak ("Time::HiRes is required");
…		…
1824	av_push (coro->args, newSVsv (ST (i)));	2089	av_push (coro->args, newSVsv (ST (i)));
1825	}	2090	}
1826	OUTPUT:	2091	OUTPUT:
1827	RETVAL	2092	RETVAL
1828		2093
1829	# these not obviously related functions are all rolled into the same xs
1830	# function to increase chances that they all will call transfer with the same
1831	# stack offset
1832	void	2094	void
1833	_set_stacklevel (...)	2095	_set_stacklevel (...)
1834	ALIAS:	2096	CODE:
1835	Coro::State::transfer = 1
1836	Coro::schedule = 2
1837	Coro::cede = 3
1838	Coro::cede_notself = 4
1839	CODE:
1840	{	2097	{
1841	struct transfer_args ta;	2098	static struct CoroSLF slf = { slf_init_set_stacklevel, slf_prepare_set_stacklevel, slf_check_nop };
		2099	api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
		2100	}
1842		2101
1843	PUTBACK;	2102	void
1844	switch (ix)	2103	transfer (...)
1845	{	2104	CODE:
1846	case 0:	2105	{
1847	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	2106	static struct CoroSLF slf = { slf_init_transfer, slf_prepare_transfer, slf_check_nop };
1848	ta.next = 0;	2107	api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
1849	break;
1850
1851	case 1:
1852	if (items != 2)
1853	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1854
1855	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1856	break;
1857
1858	case 2:
1859	prepare_schedule (aTHX_ &ta);
1860	break;
1861
1862	case 3:
1863	prepare_cede (aTHX_ &ta);
1864	break;
1865
1866	case 4:
1867	if (!prepare_cede_notself (aTHX_ &ta))
1868	XSRETURN_EMPTY;
1869
1870	break;
1871	}
1872	SPAGAIN;
1873
1874	BARRIER;
1875	PUTBACK;
1876	TRANSFER (ta, 0);
1877	SPAGAIN; /* might be the sp of a different coroutine now */
1878	/* be extra careful not to ever do anything after TRANSFER */
1879	}	2108	}
1880		2109
1881	bool	2110	bool
1882	_destroy (SV *coro_sv)	2111	_destroy (SV *coro_sv)
1883	CODE:	2112	CODE:
…		…
1994	RETVAL = boolSV (coro->flags & ix);	2223	RETVAL = boolSV (coro->flags & ix);
1995	OUTPUT:	2224	OUTPUT:
1996	RETVAL	2225	RETVAL
1997		2226
1998	void	2227	void
		2228	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2229	PROTOTYPE: $;$
		2230	CODE:
		2231	SvREFCNT_dec (self->throw);
		2232	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2233
		2234	void
1999	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2235	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		2236	C_ARGS: aTHX_ coro, flags
2000		2237
2001	SV *	2238	SV *
2002	has_cctx (Coro::State coro)	2239	has_cctx (Coro::State coro)
2003	PROTOTYPE: $	2240	PROTOTYPE: $
2004	CODE:	2241	CODE:
…		…
2012	CODE:	2249	CODE:
2013	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2250	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2014	OUTPUT:	2251	OUTPUT:
2015	RETVAL	2252	RETVAL
2016		2253
2017	IV	2254	UV
2018	rss (Coro::State coro)	2255	rss (Coro::State coro)
2019	PROTOTYPE: $	2256	PROTOTYPE: $
2020	ALIAS:	2257	ALIAS:
2021	usecount = 1	2258	usecount = 1
2022	CODE:	2259	CODE:
…		…
2074		2311
2075	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2312	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2076	coro_ready[i] = newAV ();	2313	coro_ready[i] = newAV ();
2077		2314
2078	{	2315	{
2079	SV *sv = perl_get_sv ("Coro::API", TRUE);	2316	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2080	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2081		2317
2082	coroapi.schedule = api_schedule;	2318	coroapi.schedule = api_schedule;
2083	coroapi.cede = api_cede;	2319	coroapi.cede = api_cede;
2084	coroapi.cede_notself = api_cede_notself;	2320	coroapi.cede_notself = api_cede_notself;
2085	coroapi.ready = api_ready;	2321	coroapi.ready = api_ready;
2086	coroapi.is_ready = api_is_ready;	2322	coroapi.is_ready = api_is_ready;
2087	coroapi.nready = &coro_nready;	2323	coroapi.nready = coro_nready;
2088	coroapi.current = coro_current;	2324	coroapi.current = coro_current;
2089		2325
2090	GCoroAPI = &coroapi;	2326	GCoroAPI = &coroapi;
2091	sv_setiv (sv, (IV)&coroapi);	2327	sv_setiv (sv, (IV)&coroapi);
2092	SvREADONLY_on (sv);	2328	SvREADONLY_on (sv);
2093	}	2329	}
		2330	}
		2331
		2332	void
		2333	schedule (...)
		2334	CODE:
		2335	{
		2336	static struct CoroSLF slf = { slf_init_nop, prepare_schedule, slf_check_nop };
		2337	api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
		2338	}
		2339
		2340	void
		2341	cede (...)
		2342	CODE:
		2343	{
		2344	static struct CoroSLF slf = { slf_init_nop, prepare_cede, slf_check_nop };
		2345	api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
		2346	}
		2347
		2348	void
		2349	cede_notself (...)
		2350	CODE:
		2351	{
		2352	static struct CoroSLF slf = { slf_init_nop, prepare_cede_notself, slf_check_nop };
		2353	api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
2094	}	2354	}
2095		2355
2096	void	2356	void
2097	_set_current (SV *current)	2357	_set_current (SV *current)
2098	PROTOTYPE: $	2358	PROTOTYPE: $
…		…
2133		2393
2134	SV *	2394	SV *
2135	ready (SV *self)	2395	ready (SV *self)
2136	PROTOTYPE: $	2396	PROTOTYPE: $
2137	CODE:	2397	CODE:
2138	RETVAL = boolSV (api_ready (self));	2398	RETVAL = boolSV (api_ready (aTHX_ self));
2139	OUTPUT:	2399	OUTPUT:
2140	RETVAL	2400	RETVAL
2141		2401
2142	int	2402	int
2143	nready (...)	2403	nready (...)
…		…
2145	CODE:	2405	CODE:
2146	RETVAL = coro_nready;	2406	RETVAL = coro_nready;
2147	OUTPUT:	2407	OUTPUT:
2148	RETVAL	2408	RETVAL
2149		2409
2150	void
2151	throw (Coro::State self, SV *throw = &PL_sv_undef)
2152	PROTOTYPE: $;$
2153	CODE:
2154	SvREFCNT_dec (self->throw);
2155	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2156
2157	# for async_pool speedup	2410	# for async_pool speedup
2158	void	2411	void
2159	_pool_1 (SV *cb)	2412	_pool_1 (SV *cb)
2160	CODE:	2413	CODE:
2161	{	2414	{
…		…
2204	sv_setsv (cb, &PL_sv_undef);	2457	sv_setsv (cb, &PL_sv_undef);
2205		2458
2206	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;	2459	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
2207	coro->saved_deffh = 0;	2460	coro->saved_deffh = 0;
2208		2461
2209	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2462	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2210	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2463	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2211	{	2464	{
2212	SV *old = PL_diehook;	2465	SV *old = PL_diehook;
2213	PL_diehook = 0;	2466	PL_diehook = 0;
2214	SvREFCNT_dec (old);	2467	SvREFCNT_dec (old);
…		…
2220	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2473	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2221		2474
2222	coro->prio = 0;	2475	coro->prio = 0;
2223		2476
2224	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2477	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2225	api_trace (coro_current, 0);	2478	api_trace (aTHX_ coro_current, 0);
2226		2479
2227	av_push (av_async_pool, newSVsv (coro_current));	2480	av_push (av_async_pool, newSVsv (coro_current));
2228	}	2481	}
2229		2482
2230	#if 0	2483	#if 0
…		…
2302		2555
2303	av_push (av, data_sv);	2556	av_push (av, data_sv);
2304		2557
2305	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2558	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2306		2559
2307	api_ready (self);	2560	api_ready (aTHX_ self);
2308	}	2561	}
2309		2562
2310	void	2563	void
2311	_set_state (SV *state)	2564	_set_state (SV *state)
2312	PROTOTYPE: $	2565	PROTOTYPE: $
…		…
2337	PROTOTYPE: @	2590	PROTOTYPE: @
2338	CODE:	2591	CODE:
2339	{	2592	{
2340	static int incede;	2593	static int incede;
2341		2594
2342	api_cede_notself ();	2595	api_cede_notself (aTHX);
2343		2596
2344	++incede;	2597	++incede;
2345	while (coro_nready >= incede && api_cede ())	2598	while (coro_nready >= incede && api_cede (aTHX))
2346	;	2599	;
2347		2600
2348	sv_setsv (sv_activity, &PL_sv_undef);	2601	sv_setsv (sv_activity, &PL_sv_undef);
2349	if (coro_nready >= incede)	2602	if (coro_nready >= incede)
2350	{	2603	{
…		…
2360		2613
2361	MODULE = Coro::State PACKAGE = PerlIO::cede	2614	MODULE = Coro::State PACKAGE = PerlIO::cede
2362		2615
2363	BOOT:	2616	BOOT:
2364	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2617	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2618

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Comparing Coro/Coro/State.xs (file contents): Revision 1.254 by root, Fri Nov 7 20:27:47 2008 UTC vs. Revision 1.272 by root, Fri Nov 14 20:35:49 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.254 by root, Fri Nov 7 20:27:47 2008 UTC vs.
Revision 1.272 by root, Fri Nov 14 20:35:49 2008 UTC