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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.250 by root, Wed Oct 22 16:34:07 2008 UTC vs.
Revision 1.271 by root, Fri Nov 14 07:35:32 2008 UTC

…		…
46	# define BOOT_PAGESIZE (void)0	46	# define BOOT_PAGESIZE (void)0
47	#endif	47	#endif
48		48
49	#if CORO_USE_VALGRIND	49	#if CORO_USE_VALGRIND
50	# include <valgrind/valgrind.h>	50	# include <valgrind/valgrind.h>
51	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52	#else
53	# define REGISTER_STACK(cctx,start,end)
54	#endif	51	#endif
55		52
56	/* the maximum number of idle cctx that will be pooled */	53	/* the maximum number of idle cctx that will be pooled */
57	#define MAX_IDLE_CCTX 8	54	static int cctx_max_idle = 4;
58		55
59	#define PERL_VERSION_ATLEAST(a,b,c) \	56	#define PERL_VERSION_ATLEAST(a,b,c) \
60	(PERL_REVISION > (a) \	57	(PERL_REVISION > (a) \
61	\|\| (PERL_REVISION == (a) \	58	\|\| (PERL_REVISION == (a) \
62	&& (PERL_VERSION > (b) \	59	&& (PERL_VERSION > (b) \
…		…
81	# ifndef IS_PADCONST	78	# ifndef IS_PADCONST
82	# define IS_PADCONST(v) 0	79	# define IS_PADCONST(v) 0
83	# endif	80	# endif
84	#endif	81	#endif
85		82
		83	/* 5.11 */
		84	#ifndef CxHASARGS
		85	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		86	#endif
		87
		88	/* 5.10.0 */
		89	#ifndef SvREFCNT_inc_NN
		90	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		91	#endif
		92
86	/* 5.8.8 */	93	/* 5.8.8 */
87	#ifndef GV_NOTQUAL	94	#ifndef GV_NOTQUAL
88	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
89	#endif	96	#endif
90	#ifndef newSV	97	#ifndef newSV
91	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
92	#endif	99	#endif
93	#ifndef SvREFCNT_inc_NN
94	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
95	#endif
96
97	/* 5.11 */
98	#ifndef CxHASARGS
99	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
100	#endif
101		100
102	/* 5.8.7 */	101	/* 5.8.7 */
103	#ifndef SvRV_set	102	#ifndef SvRV_set
104	# define SvRV_set(s,v) SvRV(s) = (v)	103	# define SvRV_set(s,v) SvRV(s) = (v)
105	#endif	104	#endif
…		…
117	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
118	#endif	117	#endif
119		118
120	/* The next macros try to return the current stack pointer, in an as	119	/* The next macros try to return the current stack pointer, in an as
121	* portable way as possible. */	120	* portable way as possible. */
122	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
123	#define STACKLEVEL ((void *)&stacklevel)	122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
		123	#else
		124	# define dSTACKLEVEL volatile void stacklevel = (volatile void )&stacklevel
		125	#endif
124		126
125	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
126		128
127	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
128	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
129	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
130	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
131	#else	133	#else
132	# define attribute(x)	134	# define attribute(x)
133	# define BARRIER
134	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
135	#endif	137	#endif
136		138
137	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
138	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
139		141
140	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
141		143
142	#include "CoroAPI.h"	144	#include "CoroAPI.h"
143		145
144	#ifdef USE_ITHREADS	146	#ifdef USE_ITHREADS
		147
145	static perl_mutex coro_mutex;	148	static perl_mutex coro_lock;
146	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
		151	# if CORO_PTHREAD
		152	static void *coro_thx;
		153	# endif
		154
148	#else	155	#else
		156
149	# define LOCK (void)0	157	# define LOCK (void)0
150	# define UNLOCK (void)0	158	# define UNLOCK (void)0
		159
151	#endif	160	#endif
		161
		162	# undef LOCK
		163	# define LOCK (void)0
		164	# undef UNLOCK
		165	# define UNLOCK (void)0
152		166
153	/* helper storage struct for Coro::AIO */	167	/* helper storage struct for Coro::AIO */
154	struct io_state	168	struct io_state
155	{	169	{
156	AV *res;	170	AV *res;
157	int errorno;	171	int errorno;
158	I32 laststype;	172	I32 laststype; /* U16 in 5.10.0 */
159	int laststatval;	173	int laststatval;
160	Stat_t statcache;	174	Stat_t statcache;
161	};	175	};
162		176
163	static double (nvtime)(); / so why doesn't it take void? */	177	static double (nvtime)(); / so why doesn't it take void? */
164		178
		179	static U32 cctx_gen;
165	static size_t coro_stacksize = CORO_STACKSIZE;	180	static size_t cctx_stacksize = CORO_STACKSIZE;
166	static struct CoroAPI coroapi;	181	static struct CoroAPI coroapi;
167	static AV main_mainstack; / used to differentiate between $main and others */	182	static AV main_mainstack; / used to differentiate between $main and others */
168	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
169	static HV coro_state_stash, coro_stash;	184	static HV coro_state_stash, coro_stash;
170	static volatile SV coro_mortal; / will be freed after next transfer */	185	static volatile SV coro_mortal; / will be freed/thrown after next transfer */
		186	static volatile struct coro *transfer_next;
		187
		188	struct transfer_args
		189	{
		190	struct coro prev, next;
		191	};
171		192
172	static GV irsgv; / $/ */	193	static GV irsgv; / $/ */
173	static GV stdoutgv; / STDOUT /	194	static GV stdoutgv; / STDOUT /
174	static SV *rv_diehook;	195	static SV *rv_diehook;
175	static SV *rv_warnhook;	196	static SV *rv_warnhook;
…		…
207	void idle_sp; / sp of top-level transfer/schedule/cede call */	228	void idle_sp; / sp of top-level transfer/schedule/cede call */
208	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */	229	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
209	JMPENV *top_env;	230	JMPENV *top_env;
210	coro_context cctx;	231	coro_context cctx;
211		232
		233	U32 gen;
212	#if CORO_USE_VALGRIND	234	#if CORO_USE_VALGRIND
213	int valgrind_id;	235	int valgrind_id;
214	#endif	236	#endif
215	unsigned char flags;	237	unsigned char flags;
216	} coro_cctx;	238	} coro_cctx;
…		…
276	#define PRIO_MIN -4	298	#define PRIO_MIN -4
277		299
278	/* for Coro.pm */	300	/* for Coro.pm */
279	static SV *coro_current;	301	static SV *coro_current;
280	static SV *coro_readyhook;	302	static SV *coro_readyhook;
281	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
282	static int coro_nready;
283	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
284		306
285	/ lowlevel stuff ********************************************************/	307	/ lowlevel stuff ********************************************************/
286		308
287	static SV *	309	static SV *
288	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
381	static MGVTBL coro_cv_vtbl = {	403	static MGVTBL coro_cv_vtbl = {
382	0, 0, 0, 0,	404	0, 0, 0, 0,
383	coro_cv_free	405	coro_cv_free
384	};	406	};
385		407
386	#define CORO_MAGIC(sv,type) \	408	#define CORO_MAGIC(sv, type) \
387	SvMAGIC (sv) \	409	SvMAGIC (sv) \
388	? SvMAGIC (sv)->mg_type == type \	410	? SvMAGIC (sv)->mg_type == type \
389	? SvMAGIC (sv) \	411	? SvMAGIC (sv) \
390	: mg_find (sv, type) \	412	: mg_find (sv, type) \
391	: 0	413	: 0
392		414
393	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	415	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
394	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	416	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
395		417
396	static struct coro *	418	INLINE struct coro *
397	SvSTATE_ (pTHX_ SV *coro)	419	SvSTATE_ (pTHX_ SV *coro)
398	{	420	{
399	HV *stash;	421	HV *stash;
400	MAGIC *mg;	422	MAGIC *mg;
401		423
…		…
626		648
627	/*	649	/*
628	* destroy the stacks, the callchain etc...	650	* destroy the stacks, the callchain etc...
629	*/	651	*/
630	static void	652	static void
631	coro_destroy_stacks (pTHX)	653	coro_destruct_stacks (pTHX)
632	{	654	{
633	while (PL_curstackinfo->si_next)	655	while (PL_curstackinfo->si_next)
634	PL_curstackinfo = PL_curstackinfo->si_next;	656	PL_curstackinfo = PL_curstackinfo->si_next;
635		657
636	while (PL_curstackinfo)	658	while (PL_curstackinfo)
…		…
690	#endif	712	#endif
691	}	713	}
692	}	714	}
693		715
694	return rss;	716	return rss;
		717	}
		718
		719	/ set stacklevel support ************************************************/
		720
		721	/* we sometimes need to create the effect of pp_slf calling us */
		722	#define SLF_HEAD (void)0
		723	/* we sometimes need to create the effect of leaving via pp_slf */
		724	#define SLF_TAIL slf_tail (aTHX)
		725
		726	INLINE void
		727	slf_tail (pTHX)
		728	{
		729	dSP;
		730	SV **bot = SP;
		731
		732	int gimme = GIMME_V;
		733
		734	/* make sure we put something on the stack in scalar context */
		735	if (gimme == G_SCALAR)
		736	{
		737	if (sp == bot)
		738	XPUSHs (&PL_sv_undef);
		739
		740	SP = bot + 1;
		741	}
		742
		743	PUTBACK;
695	}	744	}
696		745
697	/ coroutine stack handling **********************************************/	746	/ coroutine stack handling **********************************************/
698		747
699	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);	748	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
…		…
818	PL_rs = newSVsv (GvSV (irsgv));	867	PL_rs = newSVsv (GvSV (irsgv));
819	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	868	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
820		869
821	{	870	{
822	dSP;	871	dSP;
823	LOGOP myop;	872	UNOP myop;
824		873
825	Zero (&myop, 1, LOGOP);	874	Zero (&myop, 1, UNOP);
826	myop.op_next = Nullop;	875	myop.op_next = Nullop;
827	myop.op_flags = OPf_WANT_VOID;	876	myop.op_flags = OPf_WANT_VOID;
828		877
829	PUSHMARK (SP);	878	PUSHMARK (SP);
830	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	879	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
833	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	882	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
834	SPAGAIN;	883	SPAGAIN;
835	}	884	}
836		885
837	/* this newly created coroutine might be run on an existing cctx which most	886	/* this newly created coroutine might be run on an existing cctx which most
838	* likely was suspended in set_stacklevel, called from entersub.	887	* likely was suspended in set_stacklevel, called from pp_set_stacklevel,
839	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,	888	* so we have to emulate entering pp_set_stacklevel here.
840	* so we ENTER here for symmetry
841	*/	889	*/
842	ENTER;	890	SLF_HEAD;
843	}	891	}
844		892
845	static void	893	static void
846	coro_destroy (pTHX_ struct coro *coro)	894	coro_destruct (pTHX_ struct coro *coro)
847	{	895	{
848	if (!IN_DESTRUCT)	896	if (!IN_DESTRUCT)
849	{	897	{
850	/* restore all saved variables and stuff */	898	/* restore all saved variables and stuff */
851	LEAVE_SCOPE (0);	899	LEAVE_SCOPE (0);
…		…
873	SvREFCNT_dec (PL_warnhook);	921	SvREFCNT_dec (PL_warnhook);
874		922
875	SvREFCNT_dec (coro->saved_deffh);	923	SvREFCNT_dec (coro->saved_deffh);
876	SvREFCNT_dec (coro->throw);	924	SvREFCNT_dec (coro->throw);
877		925
878	coro_destroy_stacks (aTHX);	926	coro_destruct_stacks (aTHX);
879	}	927	}
880		928
881	static void	929	INLINE void
882	free_coro_mortal (pTHX)	930	free_coro_mortal (pTHX)
883	{	931	{
884	if (expect_true (coro_mortal))	932	if (expect_true (coro_mortal))
885	{	933	{
886	SvREFCNT_dec (coro_mortal);	934	SvREFCNT_dec (coro_mortal);
…		…
1010		1058
1011	TAINT_NOT;	1059	TAINT_NOT;
1012	return 0;	1060	return 0;
1013	}	1061	}
1014		1062
		1063	static void
		1064	prepare_set_stacklevel (struct transfer_args ta, struct coro_cctx cctx)
		1065	{
		1066	ta->prev = (struct coro *)cctx;
		1067	ta->next = 0;
		1068	}
		1069
1015	/* inject a fake call to Coro::State::_cctx_init into the execution */	1070	/* inject a fake call to Coro::State::_cctx_init into the execution */
1016	/* _cctx_init should be careful, as it could be called at almost any time */	1071	/* _cctx_init should be careful, as it could be called at almost any time */
1017	/* during execution of a perl program */	1072	/* during execution of a perl program */
		1073	/* also initialises PL_top_env */
1018	static void NOINLINE	1074	static void NOINLINE
1019	cctx_prepare (pTHX_ coro_cctx *cctx)	1075	cctx_prepare (pTHX_ coro_cctx *cctx)
1020	{	1076	{
1021	dSP;	1077	dSP;
1022	LOGOP myop;	1078	UNOP myop;
1023		1079
1024	PL_top_env = &PL_start_env;	1080	PL_top_env = &PL_start_env;
1025		1081
1026	if (cctx->flags & CC_TRACE)	1082	if (cctx->flags & CC_TRACE)
1027	PL_runops = runops_trace;	1083	PL_runops = runops_trace;
1028		1084
1029	Zero (&myop, 1, LOGOP);	1085	Zero (&myop, 1, UNOP);
1030	myop.op_next = PL_op;	1086	myop.op_next = PL_op;
1031	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	1087	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
1032		1088
1033	PUSHMARK (SP);	1089	PUSHMARK (SP);
1034	EXTEND (SP, 2);	1090	EXTEND (SP, 2);
1035	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1091	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1036	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1092	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1037	PUTBACK;	1093	PUTBACK;
1038	PL_op = (OP *)&myop;	1094	PL_op = (OP *)&myop;
1039	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1095	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1040	SPAGAIN;	1096	SPAGAIN;
1041	}	1097	}
1042		1098
		1099	/* the tail of transfer: execute stuff we can only do after a transfer */
		1100	INLINE void
		1101	transfer_tail (pTHX)
		1102	{
		1103	struct coro next = (struct coro )transfer_next;
		1104	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
		1105	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
		1106
		1107	free_coro_mortal (aTHX);
		1108	UNLOCK;
		1109
		1110	if (expect_false (next->throw))
		1111	{
		1112	SV *exception = sv_2mortal (next->throw);
		1113
		1114	next->throw = 0;
		1115	sv_setsv (ERRSV, exception);
		1116	croak (0);
		1117	}
		1118	}
		1119
1043	/*	1120	/*
1044	* this is a _very_ stripped down perl interpreter ;)	1121	* this is a _very_ stripped down perl interpreter ;)
1045	*/	1122	*/
1046	static void	1123	static void
1047	cctx_run (void *arg)	1124	cctx_run (void *arg)
1048	{	1125	{
		1126	#ifdef USE_ITHREADS
		1127	# if CORO_PTHREAD
		1128	PERL_SET_CONTEXT (coro_thx);
		1129	# endif
		1130	#endif
		1131	{
1049	dTHX;	1132	dTHX;
1050		1133
1051	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1134	/* we are the alternative tail to pp_set_stacklevel */
1052	UNLOCK;	1135	/* so do the same things here */
		1136	SLF_TAIL;
1053		1137
1054	/* we now skip the entersub that lead to transfer() */	1138	/* we now skip the op that did lead to transfer() */
1055	PL_op = PL_op->op_next;	1139	PL_op = PL_op->op_next;
1056		1140
1057	/* inject a fake subroutine call to cctx_init */	1141	/* inject a fake subroutine call to cctx_init */
1058	cctx_prepare (aTHX_ (coro_cctx *)arg);	1142	cctx_prepare (aTHX_ (coro_cctx *)arg);
1059		1143
		1144	/* cctx_run is the alternative tail of transfer() */
		1145	transfer_tail (aTHX);
		1146
1060	/* 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 */
1061	PL_restartop = PL_op;	1148	PL_restartop = PL_op;
1062	perl_run (PL_curinterp);	1149	perl_run (PL_curinterp);
1063		1150
1064	/*	1151	/*
1065	* 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
1066	* 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)
1067	* 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
1068	* bootstrap-time "top" top_env, as we cannot restore the "main"	1155	* bootstrap-time "top" top_env, as we cannot restore the "main"
1069	* coroutine as Coro has no such concept	1156	* coroutine as Coro has no such concept
1070	*/	1157	*/
1071	PL_top_env = main_top_env;	1158	PL_top_env = main_top_env;
1072	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	}
1073	}	1161	}
1074		1162
1075	static coro_cctx *	1163	static coro_cctx *
1076	cctx_new ()	1164	cctx_new ()
1077	{	1165	{
1078	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 ();
1079	void *stack_start;	1195	void *stack_start;
1080	size_t stack_size;	1196	size_t stack_size;
1081		1197
1082	++cctx_count;
1083
1084	Newz (0, cctx, 1, coro_cctx);
1085
1086	#if HAVE_MMAP	1198	#if HAVE_MMAP
1087	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1199	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1088	/* mmap supposedly does allocate-on-write for us */	1200	/* mmap supposedly does allocate-on-write for us */
1089	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1201	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
1090		1202
1091	if (cctx->sptr != (void *)-1)	1203	if (cctx->sptr != (void *)-1)
1092	{	1204	{
1093	# if CORO_STACKGUARD	1205	#if CORO_STACKGUARD
1094	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1206	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1095	# endif	1207	#endif
1096	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1208	stack_start = (char )cctx->sptr + CORO_STACKGUARD PAGESIZE;
1097	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1209	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1098	cctx->flags \|= CC_MAPPED;	1210	cctx->flags \|= CC_MAPPED;
1099	}	1211	}
1100	else	1212	else
1101	#endif	1213	#endif
1102	{	1214	{
1103	cctx->ssize = coro_stacksize * (long)sizeof (long);	1215	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1104	New (0, cctx->sptr, coro_stacksize, long);	1216	New (0, cctx->sptr, cctx_stacksize, long);
1105		1217
1106	if (!cctx->sptr)	1218	if (!cctx->sptr)
1107	{	1219	{
1108	perror ("FATAL: unable to allocate stack for coroutine");	1220	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1109	_exit (EXIT_FAILURE);	1221	_exit (EXIT_FAILURE);
1110	}	1222	}
1111		1223
1112	stack_start = cctx->sptr;	1224	stack_start = cctx->sptr;
1113	stack_size = cctx->ssize;	1225	stack_size = cctx->ssize;
1114	}	1226	}
1115		1227
1116	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
1117	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);
1118		1233
1119	return cctx;	1234	return cctx;
1120	}	1235	}
1121		1236
…		…
1124	{	1239	{
1125	if (!cctx)	1240	if (!cctx)
1126	return;	1241	return;
1127		1242
1128	--cctx_count;	1243	--cctx_count;
		1244	coro_destroy (&cctx->cctx);
1129		1245
		1246	/* coro_transfer creates new, empty cctx's */
		1247	if (cctx->sptr)
		1248	{
1130	#if CORO_USE_VALGRIND	1249	#if CORO_USE_VALGRIND
1131	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1250	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1132	#endif	1251	#endif
1133		1252
1134	#if HAVE_MMAP	1253	#if HAVE_MMAP
1135	if (cctx->flags & CC_MAPPED)	1254	if (cctx->flags & CC_MAPPED)
1136	munmap (cctx->sptr, cctx->ssize);	1255	munmap (cctx->sptr, cctx->ssize);
1137	else	1256	else
1138	#endif	1257	#endif
1139	Safefree (cctx->sptr);	1258	Safefree (cctx->sptr);
		1259	}
1140		1260
1141	Safefree (cctx);	1261	Safefree (cctx);
1142	}	1262	}
1143		1263
1144	/* wether this cctx should be destructed */	1264	/* wether this cctx should be destructed */
1145	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))	1265	#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen \|\| ((cctx)->flags & CC_NOREUSE))
1146		1266
1147	static coro_cctx *	1267	static coro_cctx *
1148	cctx_get (pTHX)	1268	cctx_get (pTHX)
1149	{	1269	{
1150	while (expect_true (cctx_first))	1270	while (expect_true (cctx_first))
…		…
1157	return cctx;	1277	return cctx;
1158		1278
1159	cctx_destroy (cctx);	1279	cctx_destroy (cctx);
1160	}	1280	}
1161		1281
1162	return cctx_new ();	1282	return cctx_new_run ();
1163	}	1283	}
1164		1284
1165	static void	1285	static void
1166	cctx_put (coro_cctx *cctx)	1286	cctx_put (coro_cctx *cctx)
1167	{	1287	{
		1288	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
		1289
1168	/* free another cctx if overlimit */	1290	/* free another cctx if overlimit */
1169	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1291	if (expect_false (cctx_idle >= cctx_max_idle))
1170	{	1292	{
1171	coro_cctx *first = cctx_first;	1293	coro_cctx *first = cctx_first;
1172	cctx_first = first->next;	1294	cctx_first = first->next;
1173	--cctx_idle;	1295	--cctx_idle;
1174		1296
…		…
1206	/* always use the TRANSFER macro */	1328	/* always use the TRANSFER macro */
1207	static void NOINLINE	1329	static void NOINLINE
1208	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)	1330	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
1209	{	1331	{
1210	dSTACKLEVEL;	1332	dSTACKLEVEL;
1211	static volatile int has_throw;
1212		1333
1213	/* sometimes transfer is only called to set idle_sp */	1334	/* sometimes transfer is only called to set idle_sp */
1214	if (expect_false (!next))	1335	if (expect_false (!next))
1215	{	1336	{
1216	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1337	((coro_cctx *)prev)->idle_sp = stacklevel;
1217	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 */
1218	}	1339	}
1219	else if (expect_true (prev != next))	1340	else if (expect_true (prev != next))
1220	{	1341	{
1221	coro_cctx *prev__cctx;	1342	coro_cctx *prev__cctx;
1222		1343
1223	if (expect_false (prev->flags & CF_NEW))	1344	if (expect_false (prev->flags & CF_NEW))
1224	{	1345	{
1225	/* create a new empty context */	1346	/* create a new empty/source context */
1226	Newz (0, prev->cctx, 1, coro_cctx);	1347	prev->cctx = cctx_new_empty ();
1227	prev->flags &= ~CF_NEW;	1348	prev->flags &= ~CF_NEW;
1228	prev->flags \|= CF_RUNNING;	1349	prev->flags \|= CF_RUNNING;
1229	}	1350	}
1230		1351
1231	prev->flags &= ~CF_RUNNING;	1352	prev->flags &= ~CF_RUNNING;
…		…
1246	else	1367	else
1247	load_perl (aTHX_ next);	1368	load_perl (aTHX_ next);
1248		1369
1249	prev__cctx = prev->cctx;	1370	prev__cctx = prev->cctx;
1250		1371
1251	/* possibly "free" the cctx */	1372	/* possibly untie and reuse the cctx */
1252	if (expect_true (	1373	if (expect_true (
1253	prev__cctx->idle_sp == STACKLEVEL	1374	prev__cctx->idle_sp == stacklevel
1254	&& !(prev__cctx->flags & CC_TRACE)	1375	&& !(prev__cctx->flags & CC_TRACE)
1255	&& !force_cctx	1376	&& !force_cctx
1256	))	1377	))
1257	{	1378	{
1258	/* 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 */
1259	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));
1260		1381
1261	prev->cctx = 0;	1382	prev->cctx = 0;
1262		1383
1263	/* 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 */
1264	/* 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 */
…		…
1272	++next->usecount;	1393	++next->usecount;
1273		1394
1274	if (expect_true (!next->cctx))	1395	if (expect_true (!next->cctx))
1275	next->cctx = cctx_get (aTHX);	1396	next->cctx = cctx_get (aTHX);
1276		1397
1277	has_throw = !!next->throw;	1398	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1399	transfer_next = next;
1278		1400
1279	if (expect_false (prev__cctx != next->cctx))	1401	if (expect_false (prev__cctx != next->cctx))
1280	{	1402	{
1281	prev__cctx->top_env = PL_top_env;	1403	prev__cctx->top_env = PL_top_env;
1282	PL_top_env = next->cctx->top_env;	1404	PL_top_env = next->cctx->top_env;
1283	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1405	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1284	}	1406	}
1285		1407
1286	free_coro_mortal (aTHX);	1408	transfer_tail (aTHX);
1287	UNLOCK;
1288
1289	if (expect_false (has_throw))
1290	{
1291	struct coro *coro = SvSTATE (coro_current);
1292
1293	if (coro->throw)
1294	{
1295	SV *exception = coro->throw;
1296	coro->throw = 0;
1297	sv_setsv (ERRSV, exception);
1298	croak (0);
1299	}
1300	}
1301	}	1409	}
1302	}	1410	}
1303
1304	struct transfer_args
1305	{
1306	struct coro prev, next;
1307	};
1308		1411
1309	#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))
1310	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1413	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1311		1414
1312	/ high level stuff ******************************************************/	1415	/ high level stuff ******************************************************/
…		…
1338	croak ("FATAL: tried to destroy currently running coroutine");	1441	croak ("FATAL: tried to destroy currently running coroutine");
1339		1442
1340	save_perl (aTHX_ &temp);	1443	save_perl (aTHX_ &temp);
1341	load_perl (aTHX_ coro);	1444	load_perl (aTHX_ coro);
1342		1445
1343	coro_destroy (aTHX_ coro);	1446	coro_destruct (aTHX_ coro);
1344		1447
1345	load_perl (aTHX_ &temp);	1448	load_perl (aTHX_ &temp);
1346		1449
1347	coro->slot = 0;	1450	coro->slot = 0;
1348	}	1451	}
…		…
1402	ta->next = SvSTATE (next_sv);	1505	ta->next = SvSTATE (next_sv);
1403	TRANSFER_CHECK (*ta);	1506	TRANSFER_CHECK (*ta);
1404	}	1507	}
1405		1508
1406	static void	1509	static void
1407	api_transfer (SV prev_sv, SV next_sv)	1510	api_transfer (pTHX_ SV prev_sv, SV next_sv)
1408	{	1511	{
1409	dTHX;
1410	struct transfer_args ta;	1512	struct transfer_args ta;
1411		1513
1412	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1514	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1413	TRANSFER (ta, 1);	1515	TRANSFER (ta, 1);
1414	}	1516	}
…		…
1432		1534
1433	return 0;	1535	return 0;
1434	}	1536	}
1435		1537
1436	static int	1538	static int
1437	api_ready (SV *coro_sv)	1539	api_ready (pTHX_ SV *coro_sv)
1438	{	1540	{
1439	dTHX;
1440	struct coro *coro;	1541	struct coro *coro;
1441	SV *sv_hook;	1542	SV *sv_hook;
1442	void (*xs_hook)(void);	1543	void (*xs_hook)(void);
1443		1544
1444	if (SvROK (coro_sv))	1545	if (SvROK (coro_sv))
…		…
1482		1583
1483	return 1;	1584	return 1;
1484	}	1585	}
1485		1586
1486	static int	1587	static int
1487	api_is_ready (SV *coro_sv)	1588	api_is_ready (pTHX_ SV *coro_sv)
1488	{	1589	{
1489	dTHX;
1490	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1590	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1491	}	1591	}
1492		1592
1493	static void	1593	INLINE void
1494	prepare_schedule (pTHX_ struct transfer_args *ta)	1594	prepare_schedule (pTHX_ struct transfer_args *ta)
1495	{	1595	{
1496	SV prev_sv, next_sv;	1596	SV prev_sv, next_sv;
1497		1597
1498	for (;;)	1598	for (;;)
…		…
1524	/* cannot transfer to destroyed coros, skip and look for next */	1624	/* cannot transfer to destroyed coros, skip and look for next */
1525	if (expect_false (ta->next->flags & CF_DESTROYED))	1625	if (expect_false (ta->next->flags & CF_DESTROYED))
1526	{	1626	{
1527	UNLOCK;	1627	UNLOCK;
1528	SvREFCNT_dec (next_sv);	1628	SvREFCNT_dec (next_sv);
1529	/* coro_nready is already taken care of by destroy */	1629	/* coro_nready has already been taken care of by destroy */
1530	continue;	1630	continue;
1531	}	1631	}
1532		1632
1533	--coro_nready;	1633	--coro_nready;
1534	UNLOCK;	1634	UNLOCK;
…		…
1537		1637
1538	/* free this only after the transfer */	1638	/* free this only after the transfer */
1539	prev_sv = SvRV (coro_current);	1639	prev_sv = SvRV (coro_current);
1540	ta->prev = SvSTATE (prev_sv);	1640	ta->prev = SvSTATE (prev_sv);
1541	TRANSFER_CHECK (*ta);	1641	TRANSFER_CHECK (*ta);
1542	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));
1543	ta->next->flags &= ~CF_READY;	1643	ta->next->flags &= ~CF_READY;
1544	SvRV_set (coro_current, next_sv);	1644	SvRV_set (coro_current, next_sv);
1545		1645
1546	LOCK;	1646	LOCK;
1547	free_coro_mortal (aTHX);	1647	free_coro_mortal (aTHX);
1548	coro_mortal = prev_sv;	1648	coro_mortal = prev_sv;
1549	UNLOCK;	1649	UNLOCK;
1550	}	1650	}
1551		1651
		1652	INLINE void
		1653	prepare_cede (pTHX_ struct transfer_args *ta)
		1654	{
		1655	api_ready (aTHX_ coro_current);
		1656	prepare_schedule (aTHX_ ta);
		1657	}
		1658
1552	static void	1659	static void
1553	prepare_cede (pTHX_ struct transfer_args *ta)	1660	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1554	{	1661	{
1555	api_ready (coro_current);	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	ta->prev = ta->next = SvSTATE (prev);
		1671	}
		1672
		1673	static void
		1674	api_schedule (pTHX)
		1675	{
		1676	struct transfer_args ta;
		1677
1556	prepare_schedule (aTHX_ ta);	1678	prepare_schedule (aTHX_ &ta);
		1679	TRANSFER (ta, 1);
1557	}	1680	}
1558		1681
1559	static int	1682	static int
1560	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1683	api_cede (pTHX)
1561	{	1684	{
1562	if (coro_nready)	1685	struct transfer_args ta;
1563	{	1686
1564	SV *prev = SvRV (coro_current);
1565	prepare_schedule (aTHX_ ta);	1687	prepare_cede (aTHX_ &ta);
1566	api_ready (prev);	1688
		1689	if (expect_true (ta.prev != ta.next))
		1690	{
		1691	TRANSFER (ta, 1);
1567	return 1;	1692	return 1;
1568	}	1693	}
1569	else	1694	else
1570	return 0;	1695	return 0;
1571	}	1696	}
1572		1697
1573	static void
1574	api_schedule (void)
1575	{
1576	dTHX;
1577	struct transfer_args ta;
1578
1579	prepare_schedule (aTHX_ &ta);
1580	TRANSFER (ta, 1);
1581	}
1582
1583	static int	1698	static int
1584	api_cede (void)	1699	api_cede_notself (pTHX)
1585	{	1700	{
1586	dTHX;	1701	if (coro_nready)
		1702	{
1587	struct transfer_args ta;	1703	struct transfer_args ta;
1588		1704
1589	prepare_cede (aTHX_ &ta);	1705	prepare_cede_notself (aTHX_ &ta);
1590
1591	if (expect_true (ta.prev != ta.next))
1592	{
1593	TRANSFER (ta, 1);	1706	TRANSFER (ta, 1);
1594	return 1;	1707	return 1;
1595	}	1708	}
1596	else	1709	else
1597	return 0;	1710	return 0;
1598	}	1711	}
1599		1712
1600	static int
1601	api_cede_notself (void)
1602	{
1603	dTHX;
1604	struct transfer_args ta;
1605
1606	if (prepare_cede_notself (aTHX_ &ta))
1607	{
1608	TRANSFER (ta, 1);
1609	return 1;
1610	}
1611	else
1612	return 0;
1613	}
1614
1615	static void	1713	static void
1616	api_trace (SV *coro_sv, int flags)	1714	api_trace (pTHX_ SV *coro_sv, int flags)
1617	{	1715	{
1618	dTHX;
1619	struct coro *coro = SvSTATE (coro_sv);	1716	struct coro *coro = SvSTATE (coro_sv);
1620		1717
1621	if (flags & CC_TRACE)	1718	if (flags & CC_TRACE)
1622	{	1719	{
1623	if (!coro->cctx)	1720	if (!coro->cctx)
1624	coro->cctx = cctx_new ();	1721	coro->cctx = cctx_new_run ();
1625	else if (!(coro->cctx->flags & CC_TRACE))	1722	else if (!(coro->cctx->flags & CC_TRACE))
1626	croak ("cannot enable tracing on coroutine with custom stack");	1723	croak ("cannot enable tracing on coroutine with custom stack");
1627		1724
1628	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));	1725	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
1629	}	1726	}
…		…
1636	else	1733	else
1637	coro->slot->runops = RUNOPS_DEFAULT;	1734	coro->slot->runops = RUNOPS_DEFAULT;
1638	}	1735	}
1639	}	1736	}
1640		1737
		1738	#if 0
1641	static int	1739	static int
1642	coro_gensub_free (pTHX_ SV sv, MAGIC mg)	1740	coro_gensub_free (pTHX_ SV sv, MAGIC mg)
1643	{	1741	{
1644	AV *padlist;	1742	AV *padlist;
1645	AV av = (AV )mg->mg_obj;	1743	AV av = (AV )mg->mg_obj;
…		…
1651		1749
1652	static MGVTBL coro_gensub_vtbl = {	1750	static MGVTBL coro_gensub_vtbl = {
1653	0, 0, 0, 0,	1751	0, 0, 0, 0,
1654	coro_gensub_free	1752	coro_gensub_free
1655	};	1753	};
		1754	#endif
1656		1755
1657	/*****************************************************************************/	1756	/*****************************************************************************/
1658	/* PerlIO::cede */	1757	/* PerlIO::cede */
1659		1758
1660	typedef struct	1759	typedef struct
…		…
1688	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1787	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1689	double now = nvtime ();	1788	double now = nvtime ();
1690		1789
1691	if (now >= self->next)	1790	if (now >= self->next)
1692	{	1791	{
1693	api_cede ();	1792	api_cede (aTHX);
1694	self->next = now + self->every;	1793	self->next = now + self->every;
1695	}	1794	}
1696		1795
1697	return PerlIOBuf_flush (aTHX_ f);	1796	return PerlIOBuf_flush (aTHX_ f);
1698	}	1797	}
…		…
1727	PerlIOBuf_get_ptr,	1826	PerlIOBuf_get_ptr,
1728	PerlIOBuf_get_cnt,	1827	PerlIOBuf_get_cnt,
1729	PerlIOBuf_set_ptrcnt,	1828	PerlIOBuf_set_ptrcnt,
1730	};	1829	};
1731		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	#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */
		1858
		1859	enum {
		1860	CORO_SLF_CUSTOM = 0,
		1861	CORO_SLF_SET_STACKLEVEL = 1,
		1862	CORO_SLF_TRANSFER = 2
		1863	};
		1864
		1865	/* declare prototype */
		1866	XS(XS_Coro__State__set_stacklevel);
		1867
		1868	/*
		1869	* these not obviously related functions are all rolled into one
		1870	* function to increase chances that they all will call transfer with the same
		1871	* stack offset
		1872	* SLF stands for "schedule-like-function".
		1873	*/
		1874	static OP *
		1875	pp_slf (pTHX)
		1876	{
		1877	dSP;
		1878	struct transfer_args ta;
		1879	SV **arg = PL_stack_base + TOPMARK + 1;
		1880	int items = SP - arg; /* args without function object */
		1881	int ix = PL_op->op_private & OPpENTERSUB_SLF;
		1882	struct CoroSLF *slf = 0;
		1883	SV gv = sp;
		1884
		1885	/* do a quick consistency check on the "function" object, and if it isn't */
		1886	/* for us, divert to the real entersub */
		1887	if (SvTYPE (gv) != SVt_PVGV \|\| CvXSUB (GvCV (gv)) != XS_Coro__State__set_stacklevel)
		1888	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1889
		1890	/* pop args */
		1891	SP = PL_stack_base + POPMARK;
		1892
		1893	if (!(PL_op->op_flags & OPf_STACKED))
		1894	{
		1895	/* ampersand-form of call, use @_ instead of stack */
		1896	AV *av = GvAV (PL_defgv);
		1897	arg = AvARRAY (av);
		1898	items = AvFILLp (av) + 1;
		1899	}
		1900
		1901	PUTBACK;
		1902
		1903	if (!ix)
		1904	{
		1905	slf = (struct CoroSLF *)CvXSUBANY (GvCV (gv)).any_ptr;
		1906	ix = slf->prepare (aTHX_ arg, items);
		1907	}
		1908
		1909	switch (ix)
		1910	{
		1911	case CORO_SLF_SET_STACKLEVEL:
		1912	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
		1913	break;
		1914
		1915	case CORO_SLF_TRANSFER:
		1916	if (items != 2)
		1917	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
		1918
		1919	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
		1920	break;
		1921
		1922	case CORO_SLF_SCHEDULE:
		1923	prepare_schedule (aTHX_ &ta);
		1924	break;
		1925
		1926	case CORO_SLF_CEDE:
		1927	prepare_cede (aTHX_ &ta);
		1928	break;
		1929
		1930	case CORO_SLF_CEDE_NOTSELF:
		1931	prepare_cede_notself (aTHX_ &ta);
		1932	break;
		1933
		1934	default:
		1935	abort ();
		1936	}
		1937
		1938	do
		1939	TRANSFER (ta, 0);
		1940	while (slf && slf->check (aTHX));
		1941
		1942	SPAGAIN;
		1943
		1944	PUTBACK;
		1945	SLF_TAIL;
		1946	SPAGAIN;
		1947	RETURN;
		1948	}
		1949
		1950	static void
		1951	coro_slf_patch (pTHX_ CV cv, int ix, SV *args, int items)
		1952	{
		1953	assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
		1954
		1955	assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));
		1956	slf_cv = cv;
		1957
		1958	/* we patch the op, and then re-run the whole call */
		1959	/* we have to put the same argument on the stack for this to work */
		1960	/* and this will be done by pp_restore */
		1961	slf_restore.op_next = (OP *)&slf_restore;
		1962	slf_restore.op_type = OP_NULL;
		1963	slf_restore.op_ppaddr = pp_restore;
		1964	slf_restore.op_first = PL_op;
		1965
		1966	slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
		1967	slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
		1968
		1969	PL_op->op_ppaddr = pp_slf;
		1970	PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF \| ix; /* we potentially share our private flags with entersub */
		1971
		1972	PL_op = (OP *)&slf_restore;
		1973	}
		1974
		1975	static void
		1976	api_execute_slf (pTHX_ CV cv, const struct CoroSLF slf, SV **arg, int items)
		1977	{
		1978	CvXSUBANY (cv).any_ptr = (void *)slf;
		1979	coro_slf_patch (aTHX_ cv, CORO_SLF_CUSTOM, arg, items);
		1980	}
1732		1981
1733	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	1982	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1734		1983
1735	PROTOTYPES: DISABLE	1984	PROTOTYPES: DISABLE
1736		1985
1737	BOOT:	1986	BOOT:
1738	{	1987	{
1739	#ifdef USE_ITHREADS	1988	#ifdef USE_ITHREADS
1740	MUTEX_INIT (&coro_mutex);	1989	MUTEX_INIT (&coro_lock);
		1990	# if CORO_PTHREAD
		1991	coro_thx = PERL_GET_CONTEXT;
		1992	# endif
1741	#endif	1993	#endif
1742	BOOT_PAGESIZE;	1994	BOOT_PAGESIZE;
1743		1995
1744	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);	1996	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
1745	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);	1997	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
…		…
1763	main_top_env = PL_top_env;	2015	main_top_env = PL_top_env;
1764		2016
1765	while (main_top_env->je_prev)	2017	while (main_top_env->je_prev)
1766	main_top_env = main_top_env->je_prev;	2018	main_top_env = main_top_env->je_prev;
1767		2019
1768	coroapi.ver = CORO_API_VERSION;	2020	coroapi.ver = CORO_API_VERSION;
1769	coroapi.rev = CORO_API_REVISION;	2021	coroapi.rev = CORO_API_REVISION;
1770	coroapi.transfer = api_transfer;	2022	coroapi.transfer = api_transfer;
		2023	coroapi.execute_slf = api_execute_slf;
1771		2024
1772	{	2025	{
1773	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2026	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1774		2027
1775	if (!svp) croak ("Time::HiRes is required");	2028	if (!svp) croak ("Time::HiRes is required");
…		…
1808	av_push (coro->args, newSVsv (ST (i)));	2061	av_push (coro->args, newSVsv (ST (i)));
1809	}	2062	}
1810	OUTPUT:	2063	OUTPUT:
1811	RETVAL	2064	RETVAL
1812		2065
1813	# these not obviously related functions are all rolled into the same xs
1814	# function to increase chances that they all will call transfer with the same
1815	# stack offset
1816	void	2066	void
1817	_set_stacklevel (...)	2067	_set_stacklevel (...)
1818	ALIAS:	2068	ALIAS:
		2069	_set_stacklevel = CORO_SLF_SET_STACKLEVEL
1819	Coro::State::transfer = 1	2070	Coro::State::transfer = CORO_SLF_TRANSFER
1820	Coro::schedule = 2	2071	Coro::schedule = CORO_SLF_SCHEDULE
1821	Coro::cede = 3	2072	Coro::cede = CORO_SLF_CEDE
1822	Coro::cede_notself = 4	2073	Coro::cede_notself = CORO_SLF_CEDE_NOTSELF
1823	CODE:	2074	CODE:
1824	{	2075	coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
1825	struct transfer_args ta;
1826
1827	PUTBACK;
1828	switch (ix)
1829	{
1830	case 0:
1831	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1832	ta.next = 0;
1833	break;
1834
1835	case 1:
1836	if (items != 2)
1837	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1838
1839	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1840	break;
1841
1842	case 2:
1843	prepare_schedule (aTHX_ &ta);
1844	break;
1845
1846	case 3:
1847	prepare_cede (aTHX_ &ta);
1848	break;
1849
1850	case 4:
1851	if (!prepare_cede_notself (aTHX_ &ta))
1852	XSRETURN_EMPTY;
1853
1854	break;
1855	}
1856	SPAGAIN;
1857
1858	BARRIER;
1859	PUTBACK;
1860	TRANSFER (ta, 0);
1861	SPAGAIN; /* might be the sp of a different coroutine now */
1862	/* be extra careful not to ever do anything after TRANSFER */
1863	}
1864		2076
1865	bool	2077	bool
1866	_destroy (SV *coro_sv)	2078	_destroy (SV *coro_sv)
1867	CODE:	2079	CODE:
1868	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2080	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1876	_exit (code);	2088	_exit (code);
1877		2089
1878	int	2090	int
1879	cctx_stacksize (int new_stacksize = 0)	2091	cctx_stacksize (int new_stacksize = 0)
1880	CODE:	2092	CODE:
1881	RETVAL = coro_stacksize;	2093	RETVAL = cctx_stacksize;
1882	if (new_stacksize)	2094	if (new_stacksize)
		2095	{
1883	coro_stacksize = new_stacksize;	2096	cctx_stacksize = new_stacksize;
		2097	++cctx_gen;
		2098	}
		2099	OUTPUT:
		2100	RETVAL
		2101
		2102	int
		2103	cctx_max_idle (int max_idle = 0)
		2104	CODE:
		2105	RETVAL = cctx_max_idle;
		2106	if (max_idle > 1)
		2107	cctx_max_idle = max_idle;
1884	OUTPUT:	2108	OUTPUT:
1885	RETVAL	2109	RETVAL
1886		2110
1887	int	2111	int
1888	cctx_count ()	2112	cctx_count ()
…		…
1966	RETVAL = boolSV (coro->flags & ix);	2190	RETVAL = boolSV (coro->flags & ix);
1967	OUTPUT:	2191	OUTPUT:
1968	RETVAL	2192	RETVAL
1969		2193
1970	void	2194	void
		2195	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2196	PROTOTYPE: $;$
		2197	CODE:
		2198	SvREFCNT_dec (self->throw);
		2199	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2200
		2201	void
1971	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2202	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		2203	C_ARGS: aTHX_ coro, flags
1972		2204
1973	SV *	2205	SV *
1974	has_cctx (Coro::State coro)	2206	has_cctx (Coro::State coro)
1975	PROTOTYPE: $	2207	PROTOTYPE: $
1976	CODE:	2208	CODE:
…		…
1984	CODE:	2216	CODE:
1985	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2217	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1986	OUTPUT:	2218	OUTPUT:
1987	RETVAL	2219	RETVAL
1988		2220
1989	IV	2221	UV
1990	rss (Coro::State coro)	2222	rss (Coro::State coro)
1991	PROTOTYPE: $	2223	PROTOTYPE: $
1992	ALIAS:	2224	ALIAS:
1993	usecount = 1	2225	usecount = 1
1994	CODE:	2226	CODE:
…		…
2005	CODE:	2237	CODE:
2006	struct coro *coro = SvSTATE (coro_current);	2238	struct coro *coro = SvSTATE (coro_current);
2007	coro->cctx->idle_sp = 0;	2239	coro->cctx->idle_sp = 0;
2008		2240
2009	void	2241	void
2010	throw (Coro::State self, SV *throw = &PL_sv_undef)
2011	PROTOTYPE: $;$
2012	CODE:
2013	SvREFCNT_dec (self->throw);
2014	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2015
2016	void
2017	swap_defsv (Coro::State self)	2242	swap_defsv (Coro::State self)
2018	PROTOTYPE: $	2243	PROTOTYPE: $
2019	ALIAS:	2244	ALIAS:
2020	swap_defav = 1	2245	swap_defav = 1
2021	CODE:	2246	CODE:
…		…
2053		2278
2054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2279	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2055	coro_ready[i] = newAV ();	2280	coro_ready[i] = newAV ();
2056		2281
2057	{	2282	{
2058	SV *sv = perl_get_sv ("Coro::API", TRUE);	2283	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2059	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2060		2284
2061	coroapi.schedule = api_schedule;	2285	coroapi.schedule = api_schedule;
2062	coroapi.cede = api_cede;	2286	coroapi.cede = api_cede;
2063	coroapi.cede_notself = api_cede_notself;	2287	coroapi.cede_notself = api_cede_notself;
2064	coroapi.ready = api_ready;	2288	coroapi.ready = api_ready;
2065	coroapi.is_ready = api_is_ready;	2289	coroapi.is_ready = api_is_ready;
2066	coroapi.nready = &coro_nready;	2290	coroapi.nready = coro_nready;
2067	coroapi.current = coro_current;	2291	coroapi.current = coro_current;
2068		2292
2069	GCoroAPI = &coroapi;	2293	GCoroAPI = &coroapi;
2070	sv_setiv (sv, (IV)&coroapi);	2294	sv_setiv (sv, (IV)&coroapi);
2071	SvREADONLY_on (sv);	2295	SvREADONLY_on (sv);
…		…
2112		2336
2113	SV *	2337	SV *
2114	ready (SV *self)	2338	ready (SV *self)
2115	PROTOTYPE: $	2339	PROTOTYPE: $
2116	CODE:	2340	CODE:
2117	RETVAL = boolSV (api_ready (self));	2341	RETVAL = boolSV (api_ready (aTHX_ self));
2118	OUTPUT:	2342	OUTPUT:
2119	RETVAL	2343	RETVAL
2120		2344
2121	int	2345	int
2122	nready (...)	2346	nready (...)
…		…
2176	sv_setsv (cb, &PL_sv_undef);	2400	sv_setsv (cb, &PL_sv_undef);
2177		2401
2178	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;	2402	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
2179	coro->saved_deffh = 0;	2403	coro->saved_deffh = 0;
2180		2404
2181	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2405	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2182	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2406	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2183	{	2407	{
2184	SV *old = PL_diehook;	2408	SV *old = PL_diehook;
2185	PL_diehook = 0;	2409	PL_diehook = 0;
2186	SvREFCNT_dec (old);	2410	SvREFCNT_dec (old);
…		…
2192	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2416	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2193		2417
2194	coro->prio = 0;	2418	coro->prio = 0;
2195		2419
2196	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2420	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2197	api_trace (coro_current, 0);	2421	api_trace (aTHX_ coro_current, 0);
2198		2422
2199	av_push (av_async_pool, newSVsv (coro_current));	2423	av_push (av_async_pool, newSVsv (coro_current));
2200	}	2424	}
2201		2425
2202	#if 0	2426	#if 0
…		…
2274		2498
2275	av_push (av, data_sv);	2499	av_push (av, data_sv);
2276		2500
2277	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2501	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2278		2502
2279	api_ready (self);	2503	api_ready (aTHX_ self);
2280	}	2504	}
2281		2505
2282	void	2506	void
2283	_set_state (SV *state)	2507	_set_state (SV *state)
2284	PROTOTYPE: $	2508	PROTOTYPE: $
…		…
2309	PROTOTYPE: @	2533	PROTOTYPE: @
2310	CODE:	2534	CODE:
2311	{	2535	{
2312	static int incede;	2536	static int incede;
2313		2537
2314	api_cede_notself ();	2538	api_cede_notself (aTHX);
2315		2539
2316	++incede;	2540	++incede;
2317	while (coro_nready >= incede && api_cede ())	2541	while (coro_nready >= incede && api_cede (aTHX))
2318	;	2542	;
2319		2543
2320	sv_setsv (sv_activity, &PL_sv_undef);	2544	sv_setsv (sv_activity, &PL_sv_undef);
2321	if (coro_nready >= incede)	2545	if (coro_nready >= incede)
2322	{	2546	{
…		…
2332		2556
2333	MODULE = Coro::State PACKAGE = PerlIO::cede	2557	MODULE = Coro::State PACKAGE = PerlIO::cede
2334		2558
2335	BOOT:	2559	BOOT:
2336	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2560	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2561

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Comparing Coro/Coro/State.xs (file contents): Revision 1.250 by root, Wed Oct 22 16:34:07 2008 UTC vs. Revision 1.271 by root, Fri Nov 14 07:35:32 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.250 by root, Wed Oct 22 16:34:07 2008 UTC vs.
Revision 1.271 by root, Fri Nov 14 07:35:32 2008 UTC