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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.245 by root, Mon Sep 22 05:40:21 2008 UTC vs.
Revision 1.276 by root, Sat Nov 15 07:49:48 2008 UTC

…		…
4	#define PERL_EXT	4	#define PERL_EXT
5		5
6	#include "EXTERN.h"	6	#include "EXTERN.h"
7	#include "perl.h"	7	#include "perl.h"
8	#include "XSUB.h"	8	#include "XSUB.h"
		9	#include "perliol.h"
9		10
10	#include "patchlevel.h"	11	#include "patchlevel.h"
11		12
12	#include <stdio.h>	13	#include <stdio.h>
13	#include <errno.h>	14	#include <errno.h>
…		…
45	# define BOOT_PAGESIZE (void)0	46	# define BOOT_PAGESIZE (void)0
46	#endif	47	#endif
47		48
48	#if CORO_USE_VALGRIND	49	#if CORO_USE_VALGRIND
49	# include <valgrind/valgrind.h>	50	# include <valgrind/valgrind.h>
50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51	#else
52	# define REGISTER_STACK(cctx,start,end)
53	#endif	51	#endif
54		52
55	/* the maximum number of idle cctx that will be pooled */	53	/* the maximum number of idle cctx that will be pooled */
56	#define MAX_IDLE_CCTX 8	54	static int cctx_max_idle = 4;
57		55
58	#define PERL_VERSION_ATLEAST(a,b,c) \	56	#define PERL_VERSION_ATLEAST(a,b,c) \
59	(PERL_REVISION > (a) \	57	(PERL_REVISION > (a) \
60	|| (PERL_REVISION == (a) \	58	|| (PERL_REVISION == (a) \
61	&& (PERL_VERSION > (b) \	59	&& (PERL_VERSION > (b) \
…		…
80	# ifndef IS_PADCONST	78	# ifndef IS_PADCONST
81	# define IS_PADCONST(v) 0	79	# define IS_PADCONST(v) 0
82	# endif	80	# endif
83	#endif	81	#endif
84		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
85	/* 5.8.8 */	93	/* 5.8.8 */
86	#ifndef GV_NOTQUAL	94	#ifndef GV_NOTQUAL
87	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
88	#endif	96	#endif
89	#ifndef newSV	97	#ifndef newSV
90	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
91	#endif	99	#endif
92		100
93	/* 5.11 */
94	#ifndef CxHASARGS
95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96	#endif
97
98	/* 5.8.7 */	101	/* 5.8.7 */
99	#ifndef SvRV_set	102	#ifndef SvRV_set
100	# define SvRV_set(s,v) SvRV(s) = (v)	103	# define SvRV_set(s,v) SvRV(s) = (v)
101	#endif	104	#endif
102		105
…		…
113	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
114	#endif	117	#endif
115		118
116	/* 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
117	* portable way as possible. */	120	* portable way as possible. */
118	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
119	#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
120		126
121	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
122		128
123	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
124	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
127	#else	133	#else
128	# define attribute(x)	134	# define attribute(x)
129	# define BARRIER
130	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
131	#endif	137	#endif
132		138
133	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
134	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
135		141
136	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
137		143
138	#include "CoroAPI.h"	144	#include "CoroAPI.h"
139		145
140	#ifdef USE_ITHREADS	146	#ifdef USE_ITHREADS
		147
141	static perl_mutex coro_mutex;	148	static perl_mutex coro_lock;
142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
143	# 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
144	#else	155	#else
		156
145	# define LOCK (void)0	157	# define LOCK (void)0
146	# define UNLOCK (void)0	158	# define UNLOCK (void)0
		159
147	#endif	160	#endif
		161
		162	# undef LOCK
		163	# define LOCK (void)0
		164	# undef UNLOCK
		165	# define UNLOCK (void)0
148		166
149	/* helper storage struct for Coro::AIO */	167	/* helper storage struct for Coro::AIO */
150	struct io_state	168	struct io_state
151	{	169	{
		170	AV *res;
152	int errorno;	171	int errorno;
153	I32 laststype;	172	I32 laststype; /* U16 in 5.10.0 */
154	int laststatval;	173	int laststatval;
155	Stat_t statcache;	174	Stat_t statcache;
156	};	175	};
157		176
		177	static double (*nvtime)(); /* so why doesn't it take void? */
		178
		179	static U32 cctx_gen;
158	static size_t coro_stacksize = CORO_STACKSIZE;	180	static size_t cctx_stacksize = CORO_STACKSIZE;
159	static struct CoroAPI coroapi;	181	static struct CoroAPI coroapi;
160	static AV *main_mainstack; /* used to differentiate between $main and others */	182	static AV *main_mainstack; /* used to differentiate between $main and others */
161	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
162	static HV *coro_state_stash, *coro_stash;	184	static HV *coro_state_stash, *coro_stash;
163	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;
164		187
165	static GV *irsgv; /* $/ */	188	static GV *irsgv; /* $/ */
166	static GV *stdoutgv; /* *STDOUT */	189	static GV *stdoutgv; /* *STDOUT */
167	static SV *rv_diehook;	190	static SV *rv_diehook;
168	static SV *rv_warnhook;	191	static SV *rv_warnhook;
…		…
187	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189	};	212	};
190		213
191	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
192	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
193	struct coro_cctx *next;	217	struct coro_cctx *next;
194		218
195	/* the stack */	219	/* the stack */
196	void *sptr;	220	void *sptr;
197	size_t ssize;	221	size_t ssize;
…		…
200	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	224	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	225	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202	JMPENV *top_env;	226	JMPENV *top_env;
203	coro_context cctx;	227	coro_context cctx;
204		228
		229	U32 gen;
205	#if CORO_USE_VALGRIND	230	#if CORO_USE_VALGRIND
206	int valgrind_id;	231	int valgrind_id;
207	#endif	232	#endif
208	unsigned char flags;	233	unsigned char flags;
209	} coro_cctx;	234	} coro_cctx;
…		…
214	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216	};	241	};
217		242
218	/* 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 */
219	typedef struct {	244	typedef struct
		245	{
220	SV *defsv;	246	SV *defsv;
221	AV *defav;	247	AV *defav;
222	SV *errsv;	248	SV *errsv;
223	SV *irsgv;	249	SV *irsgv;
224	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
228		254
229	#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))
230		256
231	/* this is a structure representing a perl-level coroutine */	257	/* this is a structure representing a perl-level coroutine */
232	struct coro {	258	struct coro {
233	/* the c coroutine allocated to this perl coroutine, if any */	259	/* the C coroutine allocated to this perl coroutine, if any */
234	coro_cctx *cctx;	260	coro_cctx *cctx;
235		261
236	/* process data */	262	/* process data */
		263	struct CoroSLF slf_frame; /* saved slf frame */
237	AV *mainstack;	264	AV *mainstack;
238	perl_slots *slot; /* basically the saved sp */	265	perl_slots *slot; /* basically the saved sp */
239		266
240	AV *args; /* data associated with this coroutine (initial args) */	267	AV *args; /* data associated with this coroutine (initial args) */
241	int refcnt; /* coroutines are refcounted, yes */	268	int refcnt; /* coroutines are refcounted, yes */
…		…
256	struct coro *next, *prev;	283	struct coro *next, *prev;
257	};	284	};
258		285
259	typedef struct coro *Coro__State;	286	typedef struct coro *Coro__State;
260	typedef struct coro *Coro__State_or_hashref;	287	typedef struct coro *Coro__State_or_hashref;
		288
		289	static struct CoroSLF slf_frame; /* the current slf frame */
261		290
262	/** Coro ********************************************************************/	291	/** Coro ********************************************************************/
263		292
264	#define PRIO_MAX 3	293	#define PRIO_MAX 3
265	#define PRIO_HIGH 1	294	#define PRIO_HIGH 1
…		…
269	#define PRIO_MIN -4	298	#define PRIO_MIN -4
270		299
271	/* for Coro.pm */	300	/* for Coro.pm */
272	static SV *coro_current;	301	static SV *coro_current;
273	static SV *coro_readyhook;	302	static SV *coro_readyhook;
274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275	static int coro_nready;
276	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
277		306
278	/** lowlevel stuff **********************************************************/	307	/** lowlevel stuff **********************************************************/
279		308
280	static SV *	309	static SV *
281	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	350	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322	#endif	351	#endif
323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	352	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324	--AvFILLp (padlist);	353	--AvFILLp (padlist);
325		354
326	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	355	av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327	av_store (newpadlist, 1, (SV *)newpad);	356	av_store (newpadlist, 1, (SV *)newpad);
328		357
329	return newpadlist;	358	return newpadlist;
330	}	359	}
331		360
…		…
374	static MGVTBL coro_cv_vtbl = {	403	static MGVTBL coro_cv_vtbl = {
375	0, 0, 0, 0,	404	0, 0, 0, 0,
376	coro_cv_free	405	coro_cv_free
377	};	406	};
378		407
379	#define CORO_MAGIC(sv,type) \	408	#define CORO_MAGIC(sv, type) \
380	SvMAGIC (sv) \	409	SvMAGIC (sv) \
381	? SvMAGIC (sv)->mg_type == type \	410	? SvMAGIC (sv)->mg_type == type \
382	? SvMAGIC (sv) \	411	? SvMAGIC (sv) \
383	: mg_find (sv, type) \	412	: mg_find (sv, type) \
384	: 0	413	: 0
385		414
386	#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)
387	#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)
388		417
389	static struct coro *	418	INLINE struct coro *
390	SvSTATE_ (pTHX_ SV *coro)	419	SvSTATE_ (pTHX_ SV *coro)
391	{	420	{
392	HV *stash;	421	HV *stash;
393	MAGIC *mg;	422	MAGIC *mg;
394		423
…		…
485	CvPADLIST (cv) = (AV *)POPs;	514	CvPADLIST (cv) = (AV *)POPs;
486	}	515	}
487		516
488	PUTBACK;	517	PUTBACK;
489	}	518	}
		519
		520	slf_frame = c->slf_frame;
490	}	521	}
491		522
492	static void	523	static void
493	save_perl (pTHX_ Coro__State c)	524	save_perl (pTHX_ Coro__State c)
494	{	525	{
		526	c->slf_frame = slf_frame;
		527
495	{	528	{
496	dSP;	529	dSP;
497	I32 cxix = cxstack_ix;	530	I32 cxix = cxstack_ix;
498	PERL_CONTEXT *ccstk = cxstack;	531	PERL_CONTEXT *ccstk = cxstack;
499	PERL_SI *top_si = PL_curstackinfo;	532	PERL_SI *top_si = PL_curstackinfo;
…		…
566	#undef VAR	599	#undef VAR
567	}	600	}
568	}	601	}
569		602
570	/*	603	/*
571	* allocate various perl stacks. This is an exact copy	604	* allocate various perl stacks. This is almost an exact copy
572	* of perl.c:init_stacks, except that it uses less memory	605	* of perl.c:init_stacks, except that it uses less memory
573	* on the (sometimes correct) assumption that coroutines do	606	* on the (sometimes correct) assumption that coroutines do
574	* not usually need a lot of stackspace.	607	* not usually need a lot of stackspace.
575	*/	608	*/
576	#if CORO_PREFER_PERL_FUNCTIONS	609	#if CORO_PREFER_PERL_FUNCTIONS
…		…
619		652
620	/*	653	/*
621	* destroy the stacks, the callchain etc...	654	* destroy the stacks, the callchain etc...
622	*/	655	*/
623	static void	656	static void
624	coro_destroy_stacks (pTHX)	657	coro_destruct_stacks (pTHX)
625	{	658	{
626	while (PL_curstackinfo->si_next)	659	while (PL_curstackinfo->si_next)
627	PL_curstackinfo = PL_curstackinfo->si_next;	660	PL_curstackinfo = PL_curstackinfo->si_next;
628		661
629	while (PL_curstackinfo)	662	while (PL_curstackinfo)
…		…
778		811
779	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
780	}	813	}
781		814
782	static void	815	static void
		816	prepare_nop (aTHX_ struct coro_transfer_args *ta)
		817	{
		818	/* kind of mega-hacky, but works */
		819	ta->next = ta->prev = (struct coro *)ta;
		820	}
		821
		822	static int
		823	slf_check_nop (aTHX)
		824	{
		825	return 0;
		826	}
		827
		828	static void
783	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
784	{	830	{
785	/*	831	/*
786	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
787	*/	833	*/
…		…
807	GvSV (PL_defgv) = newSV (0);	853	GvSV (PL_defgv) = newSV (0);
808	GvAV (PL_defgv) = coro->args; coro->args = 0;	854	GvAV (PL_defgv) = coro->args; coro->args = 0;
809	GvSV (PL_errgv) = newSV (0);	855	GvSV (PL_errgv) = newSV (0);
810	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);	856	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
811	PL_rs = newSVsv (GvSV (irsgv));	857	PL_rs = newSVsv (GvSV (irsgv));
812	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);	858	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
813		859
814	{	860	{
815	dSP;	861	dSP;
816	LOGOP myop;	862	UNOP myop;
817		863
818	Zero (&myop, 1, LOGOP);	864	Zero (&myop, 1, UNOP);
819	myop.op_next = Nullop;	865	myop.op_next = Nullop;
820	myop.op_flags = OPf_WANT_VOID;	866	myop.op_flags = OPf_WANT_VOID;
821		867
822	PUSHMARK (SP);	868	PUSHMARK (SP);
823	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
826	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
827	SPAGAIN;	873	SPAGAIN;
828	}	874	}
829		875
830	/* this newly created coroutine might be run on an existing cctx which most	876	/* this newly created coroutine might be run on an existing cctx which most
831	* likely was suspended in set_stacklevel, called from entersub.	877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
832	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
833	* so we ENTER here for symmetry
834	*/	878	*/
835	ENTER;	879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		880	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
836	}	881	}
837		882
838	static void	883	static void
839	coro_destroy (pTHX_ struct coro *coro)	884	coro_destruct (pTHX_ struct coro *coro)
840	{	885	{
841	if (!IN_DESTRUCT)	886	if (!IN_DESTRUCT)
842	{	887	{
843	/* restore all saved variables and stuff */	888	/* restore all saved variables and stuff */
844	LEAVE_SCOPE (0);	889	LEAVE_SCOPE (0);
…		…
866	SvREFCNT_dec (PL_warnhook);	911	SvREFCNT_dec (PL_warnhook);
867		912
868	SvREFCNT_dec (coro->saved_deffh);	913	SvREFCNT_dec (coro->saved_deffh);
869	SvREFCNT_dec (coro->throw);	914	SvREFCNT_dec (coro->throw);
870		915
871	coro_destroy_stacks (aTHX);	916	coro_destruct_stacks (aTHX);
872	}	917	}
873		918
874	static void	919	INLINE void
875	free_coro_mortal (pTHX)	920	free_coro_mortal (pTHX)
876	{	921	{
877	if (expect_true (coro_mortal))	922	if (expect_true (coro_mortal))
878	{	923	{
879	SvREFCNT_dec (coro_mortal);	924	SvREFCNT_dec (coro_mortal);
…		…
913	: cx->blk_gimme == G_SCALAR ? bot + 1	958	: cx->blk_gimme == G_SCALAR ? bot + 1
914	: bot;	959	: bot;
915		960
916	av_extend (av, top - bot);	961	av_extend (av, top - bot);
917	while (bot < top)	962	while (bot < top)
918	av_push (av, SvREFCNT_inc (*bot++));	963	av_push (av, SvREFCNT_inc_NN (*bot++));
919		964
920	PL_runops = RUNOPS_DEFAULT;	965	PL_runops = RUNOPS_DEFAULT;
921	ENTER;	966	ENTER;
922	SAVETMPS;	967	SAVETMPS;
923	EXTEND (SP, 3);	968	EXTEND (SP, 3);
…		…
1003		1048
1004	TAINT_NOT;	1049	TAINT_NOT;
1005	return 0;	1050	return 0;
1006	}	1051	}
1007		1052
		1053	static void
		1054	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
		1055	{
		1056	ta->prev = (struct coro *)cctx;
		1057	ta->next = 0;
		1058	}
		1059
1008	/* inject a fake call to Coro::State::_cctx_init into the execution */	1060	/* inject a fake call to Coro::State::_cctx_init into the execution */
1009	/* _cctx_init should be careful, as it could be called at almost any time */	1061	/* _cctx_init should be careful, as it could be called at almost any time */
1010	/* during execution of a perl program */	1062	/* during execution of a perl program */
		1063	/* also initialises PL_top_env */
1011	static void NOINLINE	1064	static void NOINLINE
1012	cctx_prepare (pTHX_ coro_cctx *cctx)	1065	cctx_prepare (pTHX_ coro_cctx *cctx)
1013	{	1066	{
1014	dSP;	1067	dSP;
1015	LOGOP myop;	1068	UNOP myop;
1016		1069
1017	PL_top_env = &PL_start_env;	1070	PL_top_env = &PL_start_env;
1018		1071
1019	if (cctx->flags & CC_TRACE)	1072	if (cctx->flags & CC_TRACE)
1020	PL_runops = runops_trace;	1073	PL_runops = runops_trace;
1021		1074
1022	Zero (&myop, 1, LOGOP);	1075	Zero (&myop, 1, UNOP);
1023	myop.op_next = PL_op;	1076	myop.op_next = PL_op;
1024	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1077	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1025		1078
1026	PUSHMARK (SP);	1079	PUSHMARK (SP);
1027	EXTEND (SP, 2);	1080	EXTEND (SP, 2);
1028	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1029	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1030	PUTBACK;	1083	PUTBACK;
1031	PL_op = (OP *)&myop;	1084	PL_op = (OP *)&myop;
1032	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1033	SPAGAIN;	1086	SPAGAIN;
1034	}	1087	}
1035		1088
		1089	/* the tail of transfer: execute stuff we can only do after a transfer */
		1090	INLINE void
		1091	transfer_tail (pTHX)
		1092	{
		1093	struct coro *next = (struct coro *)transfer_next;
		1094	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
		1095	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
		1096
		1097	free_coro_mortal (aTHX);
		1098	UNLOCK;
		1099
		1100	if (expect_false (next->throw))
		1101	{
		1102	SV *exception = sv_2mortal (next->throw);
		1103
		1104	next->throw = 0;
		1105	sv_setsv (ERRSV, exception);
		1106	croak (0);
		1107	}
		1108	}
		1109
1036	/*	1110	/*
1037	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1038	*/	1112	*/
1039	static void	1113	static void
1040	cctx_run (void *arg)	1114	cctx_run (void *arg)
1041	{	1115	{
		1116	#ifdef USE_ITHREADS
		1117	# if CORO_PTHREAD
		1118	PERL_SET_CONTEXT (coro_thx);
		1119	# endif
		1120	#endif
		1121	{
1042	dTHX;	1122	dTHX;
1043		1123
1044	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1124	/* normally we would need to skip the entersub here */
1045	UNLOCK;	1125	/* not doing so will re-execute it, which is exactly what we want */
1046
1047	/* we now skip the entersub that lead to transfer() */
1048	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
1049		1127
1050	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1051	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1052		1130
		1131	/* cctx_run is the alternative tail of transfer() */
		1132	/* TODO: throwing an exception here might be deadly, VERIFY */
		1133	transfer_tail (aTHX);
		1134
1053	/* somebody or something will hit me for both perl_run and PL_restartop */	1135	/* somebody or something will hit me for both perl_run and PL_restartop */
1054	PL_restartop = PL_op;	1136	PL_restartop = PL_op;
1055	perl_run (PL_curinterp);	1137	perl_run (PL_curinterp);
1056		1138
1057	/*	1139	/*
1058	* If perl-run returns we assume exit() was being called or the coro	1140	* If perl-run returns we assume exit() was being called or the coro
1059	* fell off the end, which seems to be the only valid (non-bug)	1141	* fell off the end, which seems to be the only valid (non-bug)
1060	* reason for perl_run to return. We try to exit by jumping to the	1142	* reason for perl_run to return. We try to exit by jumping to the
1061	* bootstrap-time "top" top_env, as we cannot restore the "main"	1143	* bootstrap-time "top" top_env, as we cannot restore the "main"
1062	* coroutine as Coro has no such concept	1144	* coroutine as Coro has no such concept
1063	*/	1145	*/
1064	PL_top_env = main_top_env;	1146	PL_top_env = main_top_env;
1065	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */	1147	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1148	}
1066	}	1149	}
1067		1150
1068	static coro_cctx *	1151	static coro_cctx *
1069	cctx_new ()	1152	cctx_new ()
1070	{	1153	{
1071	coro_cctx *cctx;	1154	coro_cctx *cctx;
		1155
		1156	++cctx_count;
		1157	New (0, cctx, 1, coro_cctx);
		1158
		1159	cctx->gen = cctx_gen;
		1160	cctx->flags = 0;
		1161	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1162
		1163	return cctx;
		1164	}
		1165
		1166	/* create a new cctx only suitable as source */
		1167	static coro_cctx *
		1168	cctx_new_empty ()
		1169	{
		1170	coro_cctx *cctx = cctx_new ();
		1171
		1172	cctx->sptr = 0;
		1173	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1174
		1175	return cctx;
		1176	}
		1177
		1178	/* create a new cctx suitable as destination/running a perl interpreter */
		1179	static coro_cctx *
		1180	cctx_new_run ()
		1181	{
		1182	coro_cctx *cctx = cctx_new ();
1072	void *stack_start;	1183	void *stack_start;
1073	size_t stack_size;	1184	size_t stack_size;
1074		1185
1075	++cctx_count;
1076
1077	Newz (0, cctx, 1, coro_cctx);
1078
1079	#if HAVE_MMAP	1186	#if HAVE_MMAP
1080	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1187	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1081	/* mmap supposedly does allocate-on-write for us */	1188	/* mmap supposedly does allocate-on-write for us */
1082	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1189	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1083		1190
1084	if (cctx->sptr != (void *)-1)	1191	if (cctx->sptr != (void *)-1)
1085	{	1192	{
1086	# if CORO_STACKGUARD	1193	#if CORO_STACKGUARD
1087	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1194	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1088	# endif	1195	#endif
1089	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1196	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1090	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1197	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1091	cctx->flags |= CC_MAPPED;	1198	cctx->flags |= CC_MAPPED;
1092	}	1199	}
1093	else	1200	else
1094	#endif	1201	#endif
1095	{	1202	{
1096	cctx->ssize = coro_stacksize * (long)sizeof (long);	1203	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1097	New (0, cctx->sptr, coro_stacksize, long);	1204	New (0, cctx->sptr, cctx_stacksize, long);
1098		1205
1099	if (!cctx->sptr)	1206	if (!cctx->sptr)
1100	{	1207	{
1101	perror ("FATAL: unable to allocate stack for coroutine");	1208	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1102	_exit (EXIT_FAILURE);	1209	_exit (EXIT_FAILURE);
1103	}	1210	}
1104		1211
1105	stack_start = cctx->sptr;	1212	stack_start = cctx->sptr;
1106	stack_size = cctx->ssize;	1213	stack_size = cctx->ssize;
1107	}	1214	}
1108		1215
1109	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1216	#if CORO_USE_VALGRIND
		1217	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
		1218	#endif
		1219
1110	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1220	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1111		1221
1112	return cctx;	1222	return cctx;
1113	}	1223	}
1114		1224
…		…
1117	{	1227	{
1118	if (!cctx)	1228	if (!cctx)
1119	return;	1229	return;
1120		1230
1121	--cctx_count;	1231	--cctx_count;
		1232	coro_destroy (&cctx->cctx);
1122		1233
		1234	/* coro_transfer creates new, empty cctx's */
		1235	if (cctx->sptr)
		1236	{
1123	#if CORO_USE_VALGRIND	1237	#if CORO_USE_VALGRIND
1124	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1238	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1125	#endif	1239	#endif
1126		1240
1127	#if HAVE_MMAP	1241	#if HAVE_MMAP
1128	if (cctx->flags & CC_MAPPED)	1242	if (cctx->flags & CC_MAPPED)
1129	munmap (cctx->sptr, cctx->ssize);	1243	munmap (cctx->sptr, cctx->ssize);
1130	else	1244	else
1131	#endif	1245	#endif
1132	Safefree (cctx->sptr);	1246	Safefree (cctx->sptr);
		1247	}
1133		1248
1134	Safefree (cctx);	1249	Safefree (cctx);
1135	}	1250	}
1136		1251
1137	/* wether this cctx should be destructed */	1252	/* wether this cctx should be destructed */
1138	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))	1253	#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1139		1254
1140	static coro_cctx *	1255	static coro_cctx *
1141	cctx_get (pTHX)	1256	cctx_get (pTHX)
1142	{	1257	{
1143	while (expect_true (cctx_first))	1258	while (expect_true (cctx_first))
…		…
1150	return cctx;	1265	return cctx;
1151		1266
1152	cctx_destroy (cctx);	1267	cctx_destroy (cctx);
1153	}	1268	}
1154		1269
1155	return cctx_new ();	1270	return cctx_new_run ();
1156	}	1271	}
1157		1272
1158	static void	1273	static void
1159	cctx_put (coro_cctx *cctx)	1274	cctx_put (coro_cctx *cctx)
1160	{	1275	{
		1276	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
		1277
1161	/* free another cctx if overlimit */	1278	/* free another cctx if overlimit */
1162	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1279	if (expect_false (cctx_idle >= cctx_max_idle))
1163	{	1280	{
1164	coro_cctx *first = cctx_first;	1281	coro_cctx *first = cctx_first;
1165	cctx_first = first->next;	1282	cctx_first = first->next;
1166	--cctx_idle;	1283	--cctx_idle;
1167		1284
…		…
1179	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1296	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1180	{	1297	{
1181	if (expect_true (prev != next))	1298	if (expect_true (prev != next))
1182	{	1299	{
1183	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1300	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1184	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1301	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1185		1302
1186	if (expect_false (next->flags & CF_RUNNING))	1303	if (expect_false (next->flags & CF_RUNNING))
1187	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1304	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1188		1305
1189	if (expect_false (next->flags & CF_DESTROYED))	1306	if (expect_false (next->flags & CF_DESTROYED))
1190	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1307	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1191		1308
1192	#if !PERL_VERSION_ATLEAST (5,10,0)	1309	#if !PERL_VERSION_ATLEAST (5,10,0)
1193	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1310	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1194	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1311	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1195	#endif	1312	#endif
1196	}	1313	}
1197	}	1314	}
1198		1315
1199	/* always use the TRANSFER macro */	1316	/* always use the TRANSFER macro */
1200	static void NOINLINE	1317	static void NOINLINE
1201	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1318	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1202	{	1319	{
1203	dSTACKLEVEL;	1320	dSTACKLEVEL;
1204	static volatile int has_throw;
1205		1321
1206	/* sometimes transfer is only called to set idle_sp */	1322	/* sometimes transfer is only called to set idle_sp */
1207	if (expect_false (!next))	1323	if (expect_false (!next))
1208	{	1324	{
1209	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1325	((coro_cctx *)prev)->idle_sp = stacklevel;
1210	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1326	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1211	}	1327	}
1212	else if (expect_true (prev != next))	1328	else if (expect_true (prev != next))
1213	{	1329	{
1214	coro_cctx *prev__cctx;	1330	coro_cctx *prev__cctx;
1215		1331
1216	if (expect_false (prev->flags & CF_NEW))	1332	if (expect_false (prev->flags & CF_NEW))
1217	{	1333	{
1218	/* create a new empty context */	1334	/* create a new empty/source context */
1219	Newz (0, prev->cctx, 1, coro_cctx);	1335	prev->cctx = cctx_new_empty ();
1220	prev->flags &= ~CF_NEW;	1336	prev->flags &= ~CF_NEW;
1221	prev->flags |= CF_RUNNING;	1337	prev->flags |= CF_RUNNING;
1222	}	1338	}
1223		1339
1224	prev->flags &= ~CF_RUNNING;	1340	prev->flags &= ~CF_RUNNING;
…		…
1239	else	1355	else
1240	load_perl (aTHX_ next);	1356	load_perl (aTHX_ next);
1241		1357
1242	prev__cctx = prev->cctx;	1358	prev__cctx = prev->cctx;
1243		1359
1244	/* possibly "free" the cctx */	1360	/* possibly untie and reuse the cctx */
1245	if (expect_true (	1361	if (expect_true (
1246	prev__cctx->idle_sp == STACKLEVEL	1362	prev__cctx->idle_sp == stacklevel
1247	&& !(prev__cctx->flags & CC_TRACE)	1363	&& !(prev__cctx->flags & CC_TRACE)
1248	&& !force_cctx	1364	&& !force_cctx
1249	))	1365	))
1250	{	1366	{
1251	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1367	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1252	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1368	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1253		1369
1254	prev->cctx = 0;	1370	prev->cctx = 0;
1255		1371
1256	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1372	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1257	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1373	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1265	++next->usecount;	1381	++next->usecount;
1266		1382
1267	if (expect_true (!next->cctx))	1383	if (expect_true (!next->cctx))
1268	next->cctx = cctx_get (aTHX);	1384	next->cctx = cctx_get (aTHX);
1269		1385
1270	has_throw = !!next->throw;	1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1387	transfer_next = next;
1271		1388
1272	if (expect_false (prev__cctx != next->cctx))	1389	if (expect_false (prev__cctx != next->cctx))
1273	{	1390	{
1274	prev__cctx->top_env = PL_top_env;	1391	prev__cctx->top_env = PL_top_env;
1275	PL_top_env = next->cctx->top_env;	1392	PL_top_env = next->cctx->top_env;
1276	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1277	}	1394	}
1278		1395
1279	free_coro_mortal (aTHX);	1396	transfer_tail (aTHX);
1280	UNLOCK;
1281
1282	if (expect_false (has_throw))
1283	{
1284	struct coro *coro = SvSTATE (coro_current);
1285
1286	if (coro->throw)
1287	{
1288	SV *exception = coro->throw;
1289	coro->throw = 0;
1290	sv_setsv (ERRSV, exception);
1291	croak (0);
1292	}
1293	}
1294	}	1397	}
1295	}	1398	}
1296
1297	struct transfer_args
1298	{
1299	struct coro *prev, *next;
1300	};
1301		1399
1302	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1400	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1303	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1401	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1304		1402
1305	/** high level stuff ********************************************************/	1403	/** high level stuff ********************************************************/
…		…
1325		1423
1326	if (coro->mainstack && coro->mainstack != main_mainstack)	1424	if (coro->mainstack && coro->mainstack != main_mainstack)
1327	{	1425	{
1328	struct coro temp;	1426	struct coro temp;
1329		1427
1330	if (coro->flags & CF_RUNNING)	1428	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1331	croak ("FATAL: tried to destroy currently running coroutine");
1332		1429
1333	save_perl (aTHX_ &temp);	1430	save_perl (aTHX_ &temp);
1334	load_perl (aTHX_ coro);	1431	load_perl (aTHX_ coro);
1335		1432
1336	coro_destroy (aTHX_ coro);	1433	coro_destruct (aTHX_ coro);
1337		1434
1338	load_perl (aTHX_ &temp);	1435	load_perl (aTHX_ &temp);
1339		1436
1340	coro->slot = 0;	1437	coro->slot = 0;
1341	}	1438	}
…		…
1387	# define MGf_DUP 0	1484	# define MGf_DUP 0
1388	#endif	1485	#endif
1389	};	1486	};
1390		1487
1391	static void	1488	static void
1392	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1489	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1393	{	1490	{
1394	ta->prev = SvSTATE (prev_sv);	1491	ta->prev = SvSTATE (prev_sv);
1395	ta->next = SvSTATE (next_sv);	1492	ta->next = SvSTATE (next_sv);
1396	TRANSFER_CHECK (*ta);	1493	TRANSFER_CHECK (*ta);
1397	}	1494	}
1398		1495
1399	static void	1496	static void
1400	api_transfer (SV *prev_sv, SV *next_sv)	1497	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1401	{	1498	{
1402	dTHX;
1403	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1404		1500
1405	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1406	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1407	}	1503	}
1408		1504
…		…
1425		1521
1426	return 0;	1522	return 0;
1427	}	1523	}
1428		1524
1429	static int	1525	static int
1430	api_ready (SV *coro_sv)	1526	api_ready (pTHX_ SV *coro_sv)
1431	{	1527	{
1432	dTHX;
1433	struct coro *coro;	1528	struct coro *coro;
1434	SV *sv_hook;	1529	SV *sv_hook;
1435	void (*xs_hook)(void);	1530	void (*xs_hook)(void);
1436		1531
1437	if (SvROK (coro_sv))	1532	if (SvROK (coro_sv))
…		…
1447	LOCK;	1542	LOCK;
1448		1543
1449	sv_hook = coro_nready ? 0 : coro_readyhook;	1544	sv_hook = coro_nready ? 0 : coro_readyhook;
1450	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1545	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1451		1546
1452	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));	1547	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1453	++coro_nready;	1548	++coro_nready;
1454		1549
1455	UNLOCK;	1550	UNLOCK;
1456		1551
1457	if (sv_hook)	1552	if (sv_hook)
…		…
1475		1570
1476	return 1;	1571	return 1;
1477	}	1572	}
1478		1573
1479	static int	1574	static int
1480	api_is_ready (SV *coro_sv)	1575	api_is_ready (pTHX_ SV *coro_sv)
1481	{	1576	{
1482	dTHX;
1483	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1484	}	1578	}
1485		1579
1486	static void	1580	INLINE void
1487	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1488	{	1582	{
1489	SV *prev_sv, *next_sv;	1583	SV *prev_sv, *next_sv;
1490		1584
1491	for (;;)	1585	for (;;)
1492	{	1586	{
…		…
1517	/* cannot transfer to destroyed coros, skip and look for next */	1611	/* cannot transfer to destroyed coros, skip and look for next */
1518	if (expect_false (ta->next->flags & CF_DESTROYED))	1612	if (expect_false (ta->next->flags & CF_DESTROYED))
1519	{	1613	{
1520	UNLOCK;	1614	UNLOCK;
1521	SvREFCNT_dec (next_sv);	1615	SvREFCNT_dec (next_sv);
1522	/* coro_nready is already taken care of by destroy */	1616	/* coro_nready has already been taken care of by destroy */
1523	continue;	1617	continue;
1524	}	1618	}
1525		1619
1526	--coro_nready;	1620	--coro_nready;
1527	UNLOCK;	1621	UNLOCK;
…		…
1530		1624
1531	/* free this only after the transfer */	1625	/* free this only after the transfer */
1532	prev_sv = SvRV (coro_current);	1626	prev_sv = SvRV (coro_current);
1533	ta->prev = SvSTATE (prev_sv);	1627	ta->prev = SvSTATE (prev_sv);
1534	TRANSFER_CHECK (*ta);	1628	TRANSFER_CHECK (*ta);
1535	assert (ta->next->flags & CF_READY);	1629	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1536	ta->next->flags &= ~CF_READY;	1630	ta->next->flags &= ~CF_READY;
1537	SvRV_set (coro_current, next_sv);	1631	SvRV_set (coro_current, next_sv);
1538		1632
1539	LOCK;	1633	LOCK;
1540	free_coro_mortal (aTHX);	1634	free_coro_mortal (aTHX);
1541	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1542	UNLOCK;	1636	UNLOCK;
1543	}	1637	}
1544		1638
1545	static void	1639	INLINE void
1546	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1547	{	1641	{
1548	api_ready (coro_current);	1642	api_ready (aTHX_ coro_current);
1549	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1550	}	1644	}
1551		1645
		1646	INLINE void
		1647	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1648	{
		1649	SV *prev = SvRV (coro_current);
		1650
		1651	if (coro_nready)
		1652	{
		1653	prepare_schedule (aTHX_ ta);
		1654	api_ready (aTHX_ prev);
		1655	}
		1656	else
		1657	prepare_nop (aTHX_ ta);
		1658	}
		1659
		1660	static void
		1661	api_schedule (pTHX)
		1662	{
		1663	struct coro_transfer_args ta;
		1664
		1665	prepare_schedule (aTHX_ &ta);
		1666	TRANSFER (ta, 1);
		1667	}
		1668
1552	static int	1669	static int
1553	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1670	api_cede (pTHX)
1554	{	1671	{
1555	if (coro_nready)	1672	struct coro_transfer_args ta;
1556	{	1673
1557	SV *prev = SvRV (coro_current);
1558	prepare_schedule (aTHX_ ta);	1674	prepare_cede (aTHX_ &ta);
1559	api_ready (prev);	1675
		1676	if (expect_true (ta.prev != ta.next))
		1677	{
		1678	TRANSFER (ta, 1);
1560	return 1;	1679	return 1;
1561	}	1680	}
1562	else	1681	else
1563	return 0;	1682	return 0;
1564	}	1683	}
1565		1684
1566	static void
1567	api_schedule (void)
1568	{
1569	dTHX;
1570	struct transfer_args ta;
1571
1572	prepare_schedule (aTHX_ &ta);
1573	TRANSFER (ta, 1);
1574	}
1575
1576	static int	1685	static int
1577	api_cede (void)	1686	api_cede_notself (pTHX)
1578	{	1687	{
1579	dTHX;	1688	if (coro_nready)
		1689	{
1580	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1581		1691
1582	prepare_cede (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1583
1584	if (expect_true (ta.prev != ta.next))
1585	{
1586	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1587	return 1;	1694	return 1;
1588	}	1695	}
1589	else	1696	else
1590	return 0;	1697	return 0;
1591	}	1698	}
1592		1699
1593	static int	1700	static void
1594	api_cede_notself (void)
1595	{
1596	dTHX;
1597	struct transfer_args ta;
1598
1599	if (prepare_cede_notself (aTHX_ &ta))
1600	{
1601	TRANSFER (ta, 1);
1602	return 1;
1603	}
1604	else
1605	return 0;
1606	}
1607
1608	static void
1609	api_trace (SV *coro_sv, int flags)	1701	api_trace (pTHX_ SV *coro_sv, int flags)
1610	{	1702	{
1611	dTHX;
1612	struct coro *coro = SvSTATE (coro_sv);	1703	struct coro *coro = SvSTATE (coro_sv);
1613		1704
1614	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1615	{	1706	{
1616	if (!coro->cctx)	1707	if (!coro->cctx)
1617	coro->cctx = cctx_new ();	1708	coro->cctx = cctx_new_run ();
1618	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1619	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1620		1711
1621	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1712	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1622	}	1713	}
1623	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1624	{	1715	{
…		…
1629	else	1720	else
1630	coro->slot->runops = RUNOPS_DEFAULT;	1721	coro->slot->runops = RUNOPS_DEFAULT;
1631	}	1722	}
1632	}	1723	}
1633		1724
		1725	#if 0
1634	static int	1726	static int
1635	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1727	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1636	{	1728	{
1637	AV *padlist;	1729	AV *padlist;
1638	AV *av = (AV *)mg->mg_obj;	1730	AV *av = (AV *)mg->mg_obj;
…		…
1644		1736
1645	static MGVTBL coro_gensub_vtbl = {	1737	static MGVTBL coro_gensub_vtbl = {
1646	0, 0, 0, 0,	1738	0, 0, 0, 0,
1647	coro_gensub_free	1739	coro_gensub_free
1648	};	1740	};
		1741	#endif
		1742
		1743	/*****************************************************************************/
		1744	/* PerlIO::cede */
		1745
		1746	typedef struct
		1747	{
		1748	PerlIOBuf base;
		1749	NV next, every;
		1750	} PerlIOCede;
		1751
		1752	static IV
		1753	PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
		1754	{
		1755	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1756
		1757	self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
		1758	self->next = nvtime () + self->every;
		1759
		1760	return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
		1761	}
		1762
		1763	static SV *
		1764	PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
		1765	{
		1766	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1767
		1768	return newSVnv (self->every);
		1769	}
		1770
		1771	static IV
		1772	PerlIOCede_flush (pTHX_ PerlIO *f)
		1773	{
		1774	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1775	double now = nvtime ();
		1776
		1777	if (now >= self->next)
		1778	{
		1779	api_cede (aTHX);
		1780	self->next = now + self->every;
		1781	}
		1782
		1783	return PerlIOBuf_flush (aTHX_ f);
		1784	}
		1785
		1786	static PerlIO_funcs PerlIO_cede =
		1787	{
		1788	sizeof(PerlIO_funcs),
		1789	"cede",
		1790	sizeof(PerlIOCede),
		1791	PERLIO_K_DESTRUCT | PERLIO_K_RAW,
		1792	PerlIOCede_pushed,
		1793	PerlIOBuf_popped,
		1794	PerlIOBuf_open,
		1795	PerlIOBase_binmode,
		1796	PerlIOCede_getarg,
		1797	PerlIOBase_fileno,
		1798	PerlIOBuf_dup,
		1799	PerlIOBuf_read,
		1800	PerlIOBuf_unread,
		1801	PerlIOBuf_write,
		1802	PerlIOBuf_seek,
		1803	PerlIOBuf_tell,
		1804	PerlIOBuf_close,
		1805	PerlIOCede_flush,
		1806	PerlIOBuf_fill,
		1807	PerlIOBase_eof,
		1808	PerlIOBase_error,
		1809	PerlIOBase_clearerr,
		1810	PerlIOBase_setlinebuf,
		1811	PerlIOBuf_get_base,
		1812	PerlIOBuf_bufsiz,
		1813	PerlIOBuf_get_ptr,
		1814	PerlIOBuf_get_cnt,
		1815	PerlIOBuf_set_ptrcnt,
		1816	};
		1817
		1818	/*****************************************************************************/
		1819
		1820	static const CV *slf_cv; /* for quick consistency check */
		1821
		1822	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1823	static SV *slf_arg0;
		1824	static SV *slf_arg1;
		1825	static SV *slf_arg2;
		1826
		1827	/* this restores the stack in the case we patched the entersub, to */
		1828	/* recreate the stack frame as perl will on following calls */
		1829	/* since entersub cleared the stack */
		1830	static OP *
		1831	pp_restore (pTHX)
		1832	{
		1833	dSP;
		1834
		1835	PUSHMARK (SP);
		1836
		1837	EXTEND (SP, 3);
		1838	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1839	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1840	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1841	PUSHs ((SV *)CvGV (slf_cv));
		1842
		1843	RETURNOP (slf_restore.op_first);
		1844	}
		1845
		1846	static void
		1847	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1848	{
		1849	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1850	}
		1851
		1852	static void
		1853	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1854	{
		1855	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1856
		1857	frame->prepare = slf_prepare_set_stacklevel;
		1858	frame->check = slf_check_nop;
		1859	frame->data = (void *)SvIV (arg [0]);
		1860	}
		1861
		1862	static void
		1863	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1864	{
		1865	SV **arg = (SV **)slf_frame.data;
		1866
		1867	prepare_transfer (ta, arg [0], arg [1]);
		1868	}
		1869
		1870	static void
		1871	slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1872	{
		1873	if (items != 2)
		1874	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1875
		1876	frame->prepare = slf_prepare_transfer;
		1877	frame->check = slf_check_nop;
		1878	frame->data = (void *)arg; /* let's hope it will stay valid */
		1879	}
		1880
		1881	static void
		1882	slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1883	{
		1884	frame->prepare = prepare_schedule;
		1885	frame->check = slf_check_nop;
		1886	}
		1887
		1888	static void
		1889	slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1890	{
		1891	frame->prepare = prepare_cede;
		1892	frame->check = slf_check_nop;
		1893	}
		1894
		1895	static void
		1896	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1897	{
		1898	frame->prepare = prepare_cede_notself;
		1899	frame->check = slf_check_nop;
		1900	}
		1901
		1902	/* we hijack an hopefully unused CV flag for our purposes */
		1903	#define CVf_SLF 0x4000
		1904
		1905	/*
		1906	* these not obviously related functions are all rolled into one
		1907	* function to increase chances that they all will call transfer with the same
		1908	* stack offset
		1909	* SLF stands for "schedule-like-function".
		1910	*/
		1911	static OP *
		1912	pp_slf (pTHX)
		1913	{
		1914	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1915
		1916	/* set up the slf frame, unless it has already been set-up */
		1917	/* the latter happens when a new coro has been started */
		1918	/* or when a new cctx was attached to an existing coroutine */
		1919	if (expect_true (!slf_frame.prepare))
		1920	{
		1921	/* first iteration */
		1922	dSP;
		1923	SV **arg = PL_stack_base + TOPMARK + 1;
		1924	int items = SP - arg; /* args without function object */
		1925	SV *gv = *sp;
		1926
		1927	/* do a quick consistency check on the "function" object, and if it isn't */
		1928	/* for us, divert to the real entersub */
		1929	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1930	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1931
		1932	/* pop args */
		1933	SP = PL_stack_base + POPMARK;
		1934
		1935	if (!(PL_op->op_flags & OPf_STACKED))
		1936	{
		1937	/* ampersand-form of call, use @_ instead of stack */
		1938	AV *av = GvAV (PL_defgv);
		1939	arg = AvARRAY (av);
		1940	items = AvFILLp (av) + 1;
		1941	}
		1942
		1943	PUTBACK;
		1944
		1945	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
		1946	}
		1947
		1948	/* now interpret the slf_frame */
		1949	/* we use a callback system not to make the code needlessly */
		1950	/* complicated, but so we can run multiple perl coros from one cctx */
		1951
		1952	do
		1953	{
		1954	struct coro_transfer_args ta;
		1955
		1956	slf_frame.prepare (aTHX_ &ta);
		1957	TRANSFER (ta, 0);
		1958
		1959	checkmark = PL_stack_sp - PL_stack_base;
		1960	}
		1961	while (slf_frame.check (aTHX_ &slf_frame));
		1962
		1963	{
		1964	dSP;
		1965	SV **bot = PL_stack_base + checkmark;
		1966	int gimme = GIMME_V;
		1967
		1968	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
		1969
		1970	/* make sure we put something on the stack in scalar context */
		1971	if (gimme == G_SCALAR)
		1972	{
		1973	if (sp == bot)
		1974	XPUSHs (&PL_sv_undef);
		1975
		1976	SP = bot + 1;
		1977	}
		1978
		1979	PUTBACK;
		1980	}
		1981
		1982	return NORMAL;
		1983	}
		1984
		1985	static void
		1986	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
		1987	{
		1988	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1989
		1990	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1991	&& PL_op->op_ppaddr != pp_slf)
		1992	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1993
		1994	if (items > 3)
		1995	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
		1996
		1997	CvFLAGS (cv) |= CVf_SLF;
		1998	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1999	slf_cv = cv;
		2000
		2001	/* we patch the op, and then re-run the whole call */
		2002	/* we have to put the same argument on the stack for this to work */
		2003	/* and this will be done by pp_restore */
		2004	slf_restore.op_next = (OP *)&slf_restore;
		2005	slf_restore.op_type = OP_NULL;
		2006	slf_restore.op_ppaddr = pp_restore;
		2007	slf_restore.op_first = PL_op;
		2008
		2009	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		2010	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		2011	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
		2012
		2013	PL_op->op_ppaddr = pp_slf;
		2014
		2015	PL_op = (OP *)&slf_restore;
		2016	}
		2017
		2018	/*****************************************************************************/
		2019
		2020	static int
		2021	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2022	{
		2023	AV *av = (AV *)frame->data;
		2024	SV *count_sv = AvARRAY (av)[0];
		2025
		2026	if (SvIVX (count_sv) > 0)
		2027	{
		2028	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2029	return 0;
		2030	}
		2031	else
		2032	{
		2033	int i;
		2034	/* if we were woken up but can't down, we look through the whole */
		2035	/* waiters list and only add us if we aren't in there already */
		2036	/* this avoids some degenerate memory usage cases */
		2037
		2038	for (i = 1; i <= AvFILLp (av); ++i)
		2039	if (AvARRAY (av)[i] == SvRV (coro_current))
		2040	return 1;
		2041
		2042	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2043	return 1;
		2044	}
		2045	}
		2046
		2047	static void
		2048	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		2049	{
		2050	AV *av = (AV *)SvRV (arg [0]);
		2051
		2052	if (SvIVX (AvARRAY (av)[0]) > 0)
		2053	{
		2054	frame->data = (void *)av;
		2055	frame->prepare = prepare_nop;
		2056	}
		2057	else
		2058	{
		2059	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2060
		2061	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2062	frame->prepare = prepare_schedule;
		2063	}
		2064
		2065	frame->check = slf_check_semaphore_down;
		2066
		2067	}
1649		2068
1650	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2069	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1651		2070
1652	PROTOTYPES: DISABLE	2071	PROTOTYPES: DISABLE
1653		2072
1654	BOOT:	2073	BOOT:
1655	{	2074	{
1656	#ifdef USE_ITHREADS	2075	#ifdef USE_ITHREADS
1657	MUTEX_INIT (&coro_mutex);	2076	MUTEX_INIT (&coro_lock);
		2077	# if CORO_PTHREAD
		2078	coro_thx = PERL_GET_CONTEXT;
		2079	# endif
1658	#endif	2080	#endif
1659	BOOT_PAGESIZE;	2081	BOOT_PAGESIZE;
1660		2082
1661	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	2083	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1662	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	2084	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
…		…
1680	main_top_env = PL_top_env;	2102	main_top_env = PL_top_env;
1681		2103
1682	while (main_top_env->je_prev)	2104	while (main_top_env->je_prev)
1683	main_top_env = main_top_env->je_prev;	2105	main_top_env = main_top_env->je_prev;
1684		2106
1685	coroapi.ver = CORO_API_VERSION;	2107	coroapi.ver = CORO_API_VERSION;
1686	coroapi.rev = CORO_API_REVISION;	2108	coroapi.rev = CORO_API_REVISION;
		2109
1687	coroapi.transfer = api_transfer;	2110	coroapi.transfer = api_transfer;
		2111
		2112	coroapi.sv_state = SvSTATE_;
		2113	coroapi.execute_slf = api_execute_slf;
		2114	coroapi.prepare_nop = prepare_nop;
		2115	coroapi.prepare_schedule = prepare_schedule;
		2116	coroapi.prepare_cede = prepare_cede;
		2117	coroapi.prepare_cede_notself = prepare_cede_notself;
		2118
		2119	{
		2120	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
		2121
		2122	if (!svp) croak ("Time::HiRes is required");
		2123	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
		2124
		2125	nvtime = INT2PTR (double (*)(), SvIV (*svp));
		2126	}
1688		2127
1689	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	2128	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1690	}	2129	}
1691		2130
1692	SV *	2131	SV *
…		…
1716	av_push (coro->args, newSVsv (ST (i)));	2155	av_push (coro->args, newSVsv (ST (i)));
1717	}	2156	}
1718	OUTPUT:	2157	OUTPUT:
1719	RETVAL	2158	RETVAL
1720		2159
1721	# these not obviously related functions are all rolled into the same xs
1722	# function to increase chances that they all will call transfer with the same
1723	# stack offset
1724	void	2160	void
1725	_set_stacklevel (...)	2161	_set_stacklevel (...)
1726	ALIAS:	2162	CODE:
1727	Coro::State::transfer = 1	2163	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1728	Coro::schedule = 2
1729	Coro::cede = 3
1730	Coro::cede_notself = 4
1731	CODE:
1732	{
1733	struct transfer_args ta;
1734		2164
1735	PUTBACK;	2165	void
1736	switch (ix)	2166	transfer (...)
1737	{	2167	PROTOTYPE: $$
1738	case 0:	2168	CODE:
1739	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	2169	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1740	ta.next = 0;
1741	break;
1742
1743	case 1:
1744	if (items != 2)
1745	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1746
1747	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1748	break;
1749
1750	case 2:
1751	prepare_schedule (aTHX_ &ta);
1752	break;
1753
1754	case 3:
1755	prepare_cede (aTHX_ &ta);
1756	break;
1757
1758	case 4:
1759	if (!prepare_cede_notself (aTHX_ &ta))
1760	XSRETURN_EMPTY;
1761
1762	break;
1763	}
1764	SPAGAIN;
1765
1766	BARRIER;
1767	PUTBACK;
1768	TRANSFER (ta, 0);
1769	SPAGAIN; /* might be the sp of a different coroutine now */
1770	/* be extra careful not to ever do anything after TRANSFER */
1771	}
1772		2170
1773	bool	2171	bool
1774	_destroy (SV *coro_sv)	2172	_destroy (SV *coro_sv)
1775	CODE:	2173	CODE:
1776	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2174	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1783	CODE:	2181	CODE:
1784	_exit (code);	2182	_exit (code);
1785		2183
1786	int	2184	int
1787	cctx_stacksize (int new_stacksize = 0)	2185	cctx_stacksize (int new_stacksize = 0)
		2186	PROTOTYPE: ;$
1788	CODE:	2187	CODE:
1789	RETVAL = coro_stacksize;	2188	RETVAL = cctx_stacksize;
1790	if (new_stacksize)	2189	if (new_stacksize)
		2190	{
1791	coro_stacksize = new_stacksize;	2191	cctx_stacksize = new_stacksize;
		2192	++cctx_gen;
		2193	}
1792	OUTPUT:	2194	OUTPUT:
1793	RETVAL	2195	RETVAL
1794		2196
1795	int	2197	int
		2198	cctx_max_idle (int max_idle = 0)
		2199	PROTOTYPE: ;$
		2200	CODE:
		2201	RETVAL = cctx_max_idle;
		2202	if (max_idle > 1)
		2203	cctx_max_idle = max_idle;
		2204	OUTPUT:
		2205	RETVAL
		2206
		2207	int
1796	cctx_count ()	2208	cctx_count ()
		2209	PROTOTYPE:
1797	CODE:	2210	CODE:
1798	RETVAL = cctx_count;	2211	RETVAL = cctx_count;
1799	OUTPUT:	2212	OUTPUT:
1800	RETVAL	2213	RETVAL
1801		2214
1802	int	2215	int
1803	cctx_idle ()	2216	cctx_idle ()
		2217	PROTOTYPE:
1804	CODE:	2218	CODE:
1805	RETVAL = cctx_idle;	2219	RETVAL = cctx_idle;
1806	OUTPUT:	2220	OUTPUT:
1807	RETVAL	2221	RETVAL
1808		2222
1809	void	2223	void
1810	list ()	2224	list ()
		2225	PROTOTYPE:
1811	PPCODE:	2226	PPCODE:
1812	{	2227	{
1813	struct coro *coro;	2228	struct coro *coro;
1814	for (coro = coro_first; coro; coro = coro->next)	2229	for (coro = coro_first; coro; coro = coro->next)
1815	if (coro->hv)	2230	if (coro->hv)
…		…
1874	RETVAL = boolSV (coro->flags & ix);	2289	RETVAL = boolSV (coro->flags & ix);
1875	OUTPUT:	2290	OUTPUT:
1876	RETVAL	2291	RETVAL
1877		2292
1878	void	2293	void
		2294	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2295	PROTOTYPE: $;$
		2296	CODE:
		2297	SvREFCNT_dec (self->throw);
		2298	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2299
		2300	void
1879	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2301	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2302	PROTOTYPE: $;$
		2303	C_ARGS: aTHX_ coro, flags
1880		2304
1881	SV *	2305	SV *
1882	has_cctx (Coro::State coro)	2306	has_cctx (Coro::State coro)
1883	PROTOTYPE: $	2307	PROTOTYPE: $
1884	CODE:	2308	CODE:
…		…
1892	CODE:	2316	CODE:
1893	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2317	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1894	OUTPUT:	2318	OUTPUT:
1895	RETVAL	2319	RETVAL
1896		2320
1897	IV	2321	UV
1898	rss (Coro::State coro)	2322	rss (Coro::State coro)
1899	PROTOTYPE: $	2323	PROTOTYPE: $
1900	ALIAS:	2324	ALIAS:
1901	usecount = 1	2325	usecount = 1
1902	CODE:	2326	CODE:
…		…
1908	OUTPUT:	2332	OUTPUT:
1909	RETVAL	2333	RETVAL
1910		2334
1911	void	2335	void
1912	force_cctx ()	2336	force_cctx ()
		2337	PROTOTYPE:
1913	CODE:	2338	CODE:
1914	struct coro *coro = SvSTATE (coro_current);	2339	struct coro *coro = SvSTATE (coro_current);
1915	coro->cctx->idle_sp = 0;	2340	coro->cctx->idle_sp = 0;
1916
1917	void
1918	throw (Coro::State self, SV *throw = &PL_sv_undef)
1919	PROTOTYPE: $;$
1920	CODE:
1921	SvREFCNT_dec (self->throw);
1922	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1923		2341
1924	void	2342	void
1925	swap_defsv (Coro::State self)	2343	swap_defsv (Coro::State self)
1926	PROTOTYPE: $	2344	PROTOTYPE: $
1927	ALIAS:	2345	ALIAS:
1928	swap_defav = 1	2346	swap_defav = 1
1929	CODE:	2347	CODE:
1930	if (!self->slot)	2348	if (!self->slot)
1931	croak ("cannot swap state with coroutine that has no saved state");	2349	croak ("cannot swap state with coroutine that has no saved state,");
1932	else	2350	else
1933	{	2351	{
1934	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2352	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1935	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2353	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1936		2354
…		…
1961		2379
1962	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2380	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1963	coro_ready[i] = newAV ();	2381	coro_ready[i] = newAV ();
1964		2382
1965	{	2383	{
1966	SV *sv = perl_get_sv ("Coro::API", TRUE);	2384	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1967	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1968		2385
1969	coroapi.schedule = api_schedule;	2386	coroapi.schedule = api_schedule;
1970	coroapi.cede = api_cede;	2387	coroapi.cede = api_cede;
1971	coroapi.cede_notself = api_cede_notself;	2388	coroapi.cede_notself = api_cede_notself;
1972	coroapi.ready = api_ready;	2389	coroapi.ready = api_ready;
1973	coroapi.is_ready = api_is_ready;	2390	coroapi.is_ready = api_is_ready;
1974	coroapi.nready = &coro_nready;	2391	coroapi.nready = coro_nready;
1975	coroapi.current = coro_current;	2392	coroapi.current = coro_current;
1976		2393
1977	GCoroAPI = &coroapi;	2394	GCoroAPI = &coroapi;
1978	sv_setiv (sv, (IV)&coroapi);	2395	sv_setiv (sv, (IV)&coroapi);
1979	SvREADONLY_on (sv);	2396	SvREADONLY_on (sv);
1980	}	2397	}
1981	}	2398	}
		2399
		2400	void
		2401	schedule (...)
		2402	CODE:
		2403	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
		2404
		2405	void
		2406	cede (...)
		2407	CODE:
		2408	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
		2409
		2410	void
		2411	cede_notself (...)
		2412	CODE:
		2413	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
1982		2414
1983	void	2415	void
1984	_set_current (SV *current)	2416	_set_current (SV *current)
1985	PROTOTYPE: $	2417	PROTOTYPE: $
1986	CODE:	2418	CODE:
1987	SvREFCNT_dec (SvRV (coro_current));	2419	SvREFCNT_dec (SvRV (coro_current));
1988	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	2420	SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1989		2421
1990	void	2422	void
1991	_set_readyhook (SV *hook)	2423	_set_readyhook (SV *hook)
1992	PROTOTYPE: $	2424	PROTOTYPE: $
1993	CODE:	2425	CODE:
…		…
1996	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2428	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1997	UNLOCK;	2429	UNLOCK;
1998		2430
1999	int	2431	int
2000	prio (Coro::State coro, int newprio = 0)	2432	prio (Coro::State coro, int newprio = 0)
		2433	PROTOTYPE: $;$
2001	ALIAS:	2434	ALIAS:
2002	nice = 1	2435	nice = 1
2003	CODE:	2436	CODE:
2004	{	2437	{
2005	RETVAL = coro->prio;	2438	RETVAL = coro->prio;
…		…
2020		2453
2021	SV *	2454	SV *
2022	ready (SV *self)	2455	ready (SV *self)
2023	PROTOTYPE: $	2456	PROTOTYPE: $
2024	CODE:	2457	CODE:
2025	RETVAL = boolSV (api_ready (self));	2458	RETVAL = boolSV (api_ready (aTHX_ self));
2026	OUTPUT:	2459	OUTPUT:
2027	RETVAL	2460	RETVAL
2028		2461
2029	int	2462	int
2030	nready (...)	2463	nready (...)
…		…
2053	SvREFCNT_dec (old);	2486	SvREFCNT_dec (old);
2054	croak ("\3async_pool terminate\2\n");	2487	croak ("\3async_pool terminate\2\n");
2055	}	2488	}
2056		2489
2057	SvREFCNT_dec (coro->saved_deffh);	2490	SvREFCNT_dec (coro->saved_deffh);
2058	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);	2491	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2059		2492
2060	hv_store (hv, "desc", sizeof ("desc") - 1,	2493	hv_store (hv, "desc", sizeof ("desc") - 1,
2061	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);	2494	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2062		2495
2063	invoke_av = (AV *)SvRV (invoke);	2496	invoke_av = (AV *)SvRV (invoke);
…		…
2067		2500
2068	if (len > 0)	2501	if (len > 0)
2069	{	2502	{
2070	av_fill (defav, len - 1);	2503	av_fill (defav, len - 1);
2071	for (i = 0; i < len; ++i)	2504	for (i = 0; i < len; ++i)
2072	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));	2505	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2073	}	2506	}
2074
2075	SvREFCNT_dec (invoke);
2076	}	2507	}
2077		2508
2078	void	2509	void
2079	_pool_2 (SV *cb)	2510	_pool_2 (SV *cb)
2080	CODE:	2511	CODE:
…		…
2084	sv_setsv (cb, &PL_sv_undef);	2515	sv_setsv (cb, &PL_sv_undef);
2085		2516
2086	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2517	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2087	coro->saved_deffh = 0;	2518	coro->saved_deffh = 0;
2088		2519
2089	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2520	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2090	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2521	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2091	{	2522	{
2092	SV *old = PL_diehook;	2523	SV *old = PL_diehook;
2093	PL_diehook = 0;	2524	PL_diehook = 0;
2094	SvREFCNT_dec (old);	2525	SvREFCNT_dec (old);
…		…
2100	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2531	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2101		2532
2102	coro->prio = 0;	2533	coro->prio = 0;
2103		2534
2104	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2535	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2105	api_trace (coro_current, 0);	2536	api_trace (aTHX_ coro_current, 0);
2106		2537
2107	av_push (av_async_pool, newSVsv (coro_current));	2538	av_push (av_async_pool, newSVsv (coro_current));
2108	}	2539	}
2109		2540
2110	#if 0	2541	#if 0
…		…
2156	#endif	2587	#endif
2157		2588
2158		2589
2159	MODULE = Coro::State PACKAGE = Coro::AIO	2590	MODULE = Coro::State PACKAGE = Coro::AIO
2160		2591
2161	SV *	2592	void
2162	_get_state ()	2593	_get_state (SV *self)
		2594	PROTOTYPE: $
2163	CODE:	2595	PPCODE:
2164	{	2596	{
2165	struct io_state *data;	2597	AV *defav = GvAV (PL_defgv);
2166		2598	AV *av = newAV ();
		2599	int i;
2167	RETVAL = newSV (sizeof (struct io_state));	2600	SV *data_sv = newSV (sizeof (struct io_state));
2168	data = (struct io_state *)SvPVX (RETVAL);	2601	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2169	SvCUR_set (RETVAL, sizeof (struct io_state));	2602	SvCUR_set (data_sv, sizeof (struct io_state));
2170	SvPOK_only (RETVAL);	2603	SvPOK_only (data_sv);
2171		2604
2172	data->errorno = errno;	2605	data->errorno = errno;
2173	data->laststype = PL_laststype;	2606	data->laststype = PL_laststype;
2174	data->laststatval = PL_laststatval;	2607	data->laststatval = PL_laststatval;
2175	data->statcache = PL_statcache;	2608	data->statcache = PL_statcache;
		2609
		2610	av_extend (av, AvFILLp (defav) + 1 + 1);
		2611
		2612	for (i = 0; i <= AvFILLp (defav); ++i)
		2613	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
		2614
		2615	av_push (av, data_sv);
		2616
		2617	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		2618
		2619	api_ready (aTHX_ self);
2176	}	2620	}
2177	OUTPUT:
2178	RETVAL
2179		2621
2180	void	2622	void
2181	_set_state (char *data_)	2623	_set_state (SV *state)
2182	PROTOTYPE: $	2624	PROTOTYPE: $
2183	CODE:	2625	PPCODE:
2184	{	2626	{
2185	struct io_state *data = (void *)data_;	2627	AV *av = (AV *)SvRV (state);
		2628	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
		2629	int i;
2186		2630
2187	errno = data->errorno;	2631	errno = data->errorno;
2188	PL_laststype = data->laststype;	2632	PL_laststype = data->laststype;
2189	PL_laststatval = data->laststatval;	2633	PL_laststatval = data->laststatval;
2190	PL_statcache = data->statcache;	2634	PL_statcache = data->statcache;
		2635
		2636	EXTEND (SP, AvFILLp (av));
		2637	for (i = 0; i < AvFILLp (av); ++i)
		2638	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2191	}	2639	}
2192		2640
2193		2641
2194	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2642	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2195		2643
2196	BOOT:	2644	BOOT:
2197	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2645	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2198		2646
2199	SV *	2647	SV *
2200	_schedule (...)	2648	_schedule (...)
2201	PROTOTYPE: @
2202	CODE:	2649	CODE:
2203	{	2650	{
2204	static int incede;	2651	static int incede;
2205		2652
2206	api_cede_notself ();	2653	api_cede_notself (aTHX);
2207		2654
2208	++incede;	2655	++incede;
2209	while (coro_nready >= incede && api_cede ())	2656	while (coro_nready >= incede && api_cede (aTHX))
2210	;	2657	;
2211		2658
2212	sv_setsv (sv_activity, &PL_sv_undef);	2659	sv_setsv (sv_activity, &PL_sv_undef);
2213	if (coro_nready >= incede)	2660	if (coro_nready >= incede)
2214	{	2661	{
…		…
2219	}	2666	}
2220		2667
2221	--incede;	2668	--incede;
2222	}	2669	}
2223		2670
		2671
		2672	MODULE = Coro::State PACKAGE = PerlIO::cede
		2673
		2674	BOOT:
		2675	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2676
		2677	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2678
		2679	SV *
		2680	new (SV *klass, SV *count_ = 0)
		2681	CODE:
		2682	{
		2683	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2684	AV *av = newAV ();
		2685	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2686	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2687	}
		2688	OUTPUT:
		2689	RETVAL
		2690
		2691	SV *
		2692	count (SV *self)
		2693	CODE:
		2694	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2695	OUTPUT:
		2696	RETVAL
		2697
		2698	void
		2699	up (SV *self, int adjust = 1)
		2700	ALIAS:
		2701	adjust = 1
		2702	CODE:
		2703	{
		2704	AV *av = (AV *)SvRV (self);
		2705	SV *count_sv = AvARRAY (av)[0];
		2706	IV count = SvIVX (count_sv);
		2707
		2708	count += ix ? adjust : 1;
		2709	SvIVX (count_sv) = count;
		2710
		2711	/* now wake up as many waiters as possible */
		2712	while (count > 0 && AvFILLp (av) >= count)
		2713	{
		2714	SV *cb;
		2715
		2716	/* swap first two elements so we can shift a waiter */
		2717	AvARRAY (av)[0] = AvARRAY (av)[1];
		2718	AvARRAY (av)[1] = count_sv;
		2719	cb = av_shift (av);
		2720
		2721	if (SvOBJECT (cb))
		2722	api_ready (cb);
		2723	else
		2724	croak ("callbacks not yet supported");
		2725
		2726	SvREFCNT_dec (cb);
		2727	}
		2728	}
		2729
		2730	void
		2731	down (SV *self)
		2732	CODE:
		2733	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
		2734
		2735	void
		2736	try (SV *self)
		2737	PPCODE:
		2738	{
		2739	AV *av = (AV *)SvRV (self);
		2740	SV *count_sv = AvARRAY (av)[0];
		2741	IV count = SvIVX (count_sv);
		2742
		2743	if (count > 0)
		2744	{
		2745	--count;
		2746	SvIVX (count_sv) = count;
		2747	XSRETURN_YES;
		2748	}
		2749	else
		2750	XSRETURN_NO;
		2751	}
		2752
		2753	void
		2754	waiters (SV *self)
		2755	CODE:
		2756	{
		2757	AV *av = (AV *)SvRV (self);
		2758
		2759	if (GIMME_V == G_SCALAR)
		2760	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2761	else
		2762	{
		2763	int i;
		2764	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2765	for (i = 1; i <= AvFILLp (av); ++i)
		2766	PUSHs (newSVsv (AvARRAY (av)[i]));
		2767	}
		2768	}
		2769

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