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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs.
Revision 1.152 by root, Thu Sep 20 12:02:25 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
63		92
64	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
65	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
66	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
68		98
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		100
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
72		110
73	#include "CoroAPI.h"	111	#include "CoroAPI.h"
74		112
75	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
…		…
79	#else	117	#else
80	# define LOCK (void)0	118	# define LOCK (void)0
81	# define UNLOCK (void)0	119	# define UNLOCK (void)0
82	#endif	120	#endif
83		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
88		137
89	/* this is actually not just the c stack but also c registers etc... */	138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
		141	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	142	typedef struct coro_cctx {
91	struct coro_stack *next;	143	struct coro_cctx *next;
92		144
93	void *idle_sp;	145	/* the stack */
94	void *sptr;	146	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
96		148
97	/* cpu state */	149	/* cpu state */
		150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		152	JMPENV *top_env;
98	coro_context cctx;	153	coro_context cctx;
99	} coro_stack;
100		154
101	static coro_stack *main_stack;	155	#if CORO_USE_VALGRIND
		156	int valgrind_id;
		157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
102		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
		167
		168	/* this is a structure representing a perl-level coroutine */
103	struct coro {	169	struct coro {
104	/* optionally saved, might be zero */	170	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	171	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		172
150	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
151	AV *args;	174	AV *args;
152	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
		178
		179	/* optionally saved, might be zero */
		180	AV *defav; /* @_ */
		181	SV *defsv; /* $_ */
		182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
		186
		187	#define VAR(name,type) type name;
		188	# include "state.h"
		189	#undef VAR
		190
		191	/* coro process data */
		192	int prio;
		193
		194	/* linked list */
		195	struct coro *next, *prev;
		196	HV *hv; /* the perl hash associated with this coro, if any */
153	};	197	};
154		198
155	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
157		201
		202	/** Coro ********************************************************************/
		203
		204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *first;
		216
		217	/** lowlevel stuff **********************************************************/
		218
158	static AV *	219	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
160	{	221	{
161	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
163		224
164	newpadlist = newAV ();	225	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	231	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	233	--AvFILLp (padlist);
173		234
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		279
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		281
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		283
		284	#define CORO_MAGIC(cv) \
		285	SvMAGIC (cv) \
		286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		287	? SvMAGIC (cv) \
		288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		289	: 0
		290
223	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
224	static void	292	static void
225	get_padlist (pTHX_ CV *cv)	293	get_padlist (pTHX_ CV *cv)
226	{	294	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
228		297
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	300	else
232	{	301	{
233	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	303	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	304	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
239	#else	308	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	312	}
244		313
245	static void	314	static void
246	put_padlist (pTHX_ CV *cv)	315	put_padlist (pTHX_ CV *cv)
247	{	316	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
249		319
250	if (!mg)	320	if (!mg)
251	{	321	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
256	}	326	}
257		327
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	328	av = (AV *)mg->mg_obj;
		329
		330	if (AvFILLp (av) >= AvMAX (av))
		331	av_extend (av, AvMAX (av) + 1);
		332
		333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	334	}
		335
		336	/** load & save, init *******************************************************/
260		337
261	#define SB do {	338	#define SB do {
262	#define SE } while (0)	339	#define SE } while (0)
263		340
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		342
269	static void	343	static void
270	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
271	{	345	{
272	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	347	# include "state.h"
274		348	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		349
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
310		369
311	{	370	{
312	dSP;	371	dSP;
313	CV *cv;	372	CV *cv;
314		373
315	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
317	{	376	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
324	}	379	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	380	}
328		381
329	PUTBACK;	382	PUTBACK;
330	}	383	}
331	}	384	}
332		385
333	static void	386	static void
334	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
335	{	388	{
336	{	389	{
337	dSP;	390	dSP;
338	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	395	/*
343	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
345	*/	398	*/
346		399
		400	EXTEND (SP, 3 + 1);
347	PUSHs (Nullsv);	401	PUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
349	for (;;)	403	for (;;)
350	{	404	{
351	while (cxix >= 0)	405	while (cxix >= 0)
352	{	406	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
354		408
355	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
356	{	410	{
357	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
358	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
359	{	414	{
360	EXTEND (SP, CvDEPTH(cv)*2);	415	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
371		419
		420	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	421	get_padlist (aTHX_ cv);
373	}	422	}
374	}	423	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	424	}
384		425
385	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
386	break;	427	break;
387		428
…		…
391	}	432	}
392		433
393	PUTBACK;	434	PUTBACK;
394	}	435	}
395		436
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
399		442
400	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	444	# include "state.h"
402		445	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	446	}
435		447
436	/*	448	/*
437	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
441	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
442	static void	457	static void
443	coro_init_stacks (pTHX)	458	coro_init_stacks (pTHX)
444	{	459	{
445	LOCK;
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
448	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		464
452	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		468
456	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
457	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	472	PL_tmps_max = 128;
460		473
461	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
462	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
464		477
465	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
467	#endif	480	#endif
468		481
469	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
470	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
472		485
473	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	488	PL_savestack_max = 64;
476		489
477	#if PERL_VERSION < 9	490	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
479	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	493	PL_retstack_max = 16;
481	#endif	494	#endif
482
483	UNLOCK;
484	}	495	}
		496	#endif
485		497
486	/*	498	/*
487	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
488	*/	500	*/
489	static void	501	static void
490	destroy_stacks(pTHX)	502	coro_destroy_stacks (pTHX)
491	{	503	{
492	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
493	{	505	{
494	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
495	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
496		509
497	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
498	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
499		513
		514	/* unwind all extra stacks */
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
501	}	519	}
502		520
503	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
505		523
506	while (PL_curstackinfo)	524	while (PL_curstackinfo)
507	{	525	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
509		527
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		530
522	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	533	PL_curstackinfo = p;
525	}	534	}
526		535
527	Safefree (PL_tmps_stack);	536	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	537	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	538	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	539	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	540	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	541	Safefree (PL_retstack);
533	#endif	542	#endif
534	}	543	}
535		544
		545	static size_t
		546	coro_rss (struct coro *coro)
		547	{
		548	size_t rss = sizeof (coro);
		549
		550	if (coro->mainstack)
		551	{
		552	rss += sizeof (coro->curstackinfo);
		553	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		554	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		555
		556	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		557
		558	rss += coro->tmps_max * sizeof (SV *);
		559
		560	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		561
		562	rss += coro->scopestack_max * sizeof (I32);
		563
		564	rss += coro->savestack_max * sizeof (ANY);
		565
		566	#if !PERL_VERSION_ATLEAST (5,9,0)
		567	rss += coro->retstack_max * sizeof (OP *);
		568	#endif
		569	}
		570
		571	return rss;
		572	}
		573
		574	/** coroutine stack handling ************************************************/
		575
536	static void	576	static void
537	setup_coro (struct coro *coro)	577	setup_coro (pTHX_ struct coro *coro)
538	{	578	{
539	/*	579	/*
540	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
541	*/	581	*/
542	dTHX;	582	coro_init_stacks (aTHX);
		583
		584	PL_curcop = &PL_compiling;
		585	PL_in_eval = EVAL_NULL;
		586	PL_comppad = 0;
		587	PL_curpm = 0;
		588	PL_localizing = 0;
		589	PL_dirty = 0;
		590	PL_restartop = 0;
		591
		592	{
		593	dSP;
		594	LOGOP myop;
		595
		596	SvREFCNT_dec (GvAV (PL_defgv));
		597	GvAV (PL_defgv) = coro->args; coro->args = 0;
		598
		599	Zero (&myop, 1, LOGOP);
		600	myop.op_next = Nullop;
		601	myop.op_flags = OPf_WANT_VOID;
		602
		603	PUSHMARK (SP);
		604	XPUSHs (av_shift (GvAV (PL_defgv)));
		605	PUTBACK;
		606	PL_op = (OP *)&myop;
		607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		608	SPAGAIN;
		609	}
		610
		611	ENTER; /* necessary e.g. for dounwind */
		612	}
		613
		614	static void
		615	free_coro_mortal (pTHX)
		616	{
		617	if (coro_mortal)
		618	{
		619	SvREFCNT_dec (coro_mortal);
		620	coro_mortal = 0;
		621	}
		622	}
		623
		624	/* inject a fake call to Coro::State::_cctx_init into the execution */
		625	/* _cctx_init should be careful, as it could be called at almost any time */
		626	/* during execution of a perl program */
		627	static void NOINLINE
		628	prepare_cctx (pTHX_ coro_cctx *cctx)
		629	{
543	dSP;	630	dSP;
544	UNOP myop;	631	LOGOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		632
547	coro_init_stacks (aTHX);
548	/*PL_curcop = 0;*/
549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552
553	SPAGAIN;
554
555	Zero (&myop, 1, UNOP);	633	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	634	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	635	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		636
		637	PUSHMARK (SP);
		638	EXTEND (SP, 2);
		639	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		640	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		641	PUTBACK;
559	PL_op = (OP *)&myop;	642	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	644	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	645	}
569		646
		647	/*
		648	* this is a _very_ stripped down perl interpreter ;)
		649	*/
570	static void	650	static void
571	transfer_tail ()	651	coro_run (void *arg)
572	{	652	{
573	if (coro_mortal)	653	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		654
		655	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	656	UNLOCK;
580	}
581		657
582	static void	658	PL_top_env = &PL_start_env;
583	coro_run (void *arg)	659
584	{	660	/* inject a fake subroutine call to cctx_init */
		661	prepare_cctx (aTHX_ (coro_cctx *)arg);
		662
		663	/* somebody or something will hit me for both perl_run and PL_restartop */
		664	PL_restartop = PL_op;
		665	perl_run (PL_curinterp);
		666
585	/*	667	/*
586	* this is a _very_ stripped down perl interpreter ;)	668	* If perl-run returns we assume exit() was being called or the coro
		669	* fell off the end, which seems to be the only valid (non-bug)
		670	* reason for perl_run to return. We try to exit by jumping to the
		671	* bootstrap-time "top" top_env, as we cannot restore the "main"
		672	* coroutine as Coro has no such concept
587	*/	673	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	674	PL_top_env = main_top_env;
593	PL_restartop = PL_op->op_next;	675	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	/* somebody will hit me for both perl_run and PL_restart_top */
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}	676	}
599		677
600	static coro_stack *	678	static coro_cctx *
601	stack_new ()	679	cctx_new ()
602	{	680	{
603	coro_stack *stack;	681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
604		684
		685	++cctx_count;
		686
605	New (0, stack, 1, coro_stack);	687	Newz (0, cctx, 1, coro_cctx);
606		688
607	#if HAVE_MMAP	689	#if HAVE_MMAP
608		690
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		692	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		694
612	if (stack->sptr == (void *)-1)	695	if (cctx->sptr != (void *)-1)
		696	{
		697	# if CORO_STACKGUARD
		698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		699	# endif
		700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		702	cctx->mapped = 1;
613	{	703	}
		704	else
		705	#endif
		706	{
		707	cctx->ssize = coro_stacksize * (long)sizeof (long);
		708	New (0, cctx->sptr, coro_stacksize, long);
		709
		710	if (!cctx->sptr)
		711	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	712	perror ("FATAL: unable to allocate stack for coroutine");
615	_exit (EXIT_FAILURE);	713	_exit (EXIT_FAILURE);
616	}	714	}
617		715
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	716	stack_start = cctx->sptr;
619		717	stack_size = cctx->ssize;
620	#else
621
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{	718	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630		719
631	#endif	720	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
634		722
635	return stack;	723	return cctx;
636	}	724	}
637		725
638	static void	726	static void
639	stack_free (coro_stack *stack)	727	cctx_destroy (coro_cctx *cctx)
640	{	728	{
641	if (!stack || stack == main_stack)	729	if (!cctx)
642	return;	730	return;
643		731
		732	--cctx_count;
		733
		734	#if CORO_USE_VALGRIND
		735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		736	#endif
		737
644	#if HAVE_MMAP	738	#if HAVE_MMAP
		739	if (cctx->mapped)
645	munmap (stack->sptr, stack->ssize);	740	munmap (cctx->sptr, cctx->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static void
656	stack_get (struct coro *coro)
657	{
658	if (stack_first)
659	{
660	coro->stack = stack_first;
661	stack_first = stack_first->next;
662	}
663	else	741	else
664	coro->stack = stack_new ();	742	#endif
665	}	743	Safefree (cctx->sptr);
666		744
667	static void	745	Safefree (cctx);
668	stack_put (coro_stack *stack)
669	{
670	stack->next = stack_first;
671	stack_first = stack;
672	}	746	}
		747
		748	static coro_cctx *
		749	cctx_get (pTHX)
		750	{
		751	while (cctx_first)
		752	{
		753	coro_cctx *cctx = cctx_first;
		754	cctx_first = cctx->next;
		755	--cctx_idle;
		756
		757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
		761	}
		762
		763	PL_op = PL_op->op_next;
		764	return cctx_new ();
		765	}
		766
		767	static void
		768	cctx_put (coro_cctx *cctx)
		769	{
		770	/* free another cctx if overlimit */
		771	if (cctx_idle >= MAX_IDLE_CCTX)
		772	{
		773	coro_cctx *first = cctx_first;
		774	cctx_first = first->next;
		775	--cctx_idle;
		776
		777	assert (!first->inuse);
		778	cctx_destroy (first);
		779	}
		780
		781	++cctx_idle;
		782	cctx->next = cctx_first;
		783	cctx_first = cctx;
		784	}
		785
		786	/** coroutine switching *****************************************************/
673		787
674	/* never call directly, always through the coro_state_transfer global variable */	788	/* never call directly, always through the coro_state_transfer global variable */
675	static void	789	static void NOINLINE
676	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	790	transfer (pTHX_ struct coro *prev, struct coro *next)
677	{	791	{
678	dSTACKLEVEL;	792	dSTACKLEVEL;
679		793
680	/* sometimes transfer is only called to set idle_sp */	794	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	795	if (!next)
682	prev->stack->idle_sp = stacklevel;	796	{
683		797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	798	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
685		799	}
686	if (prev != next)	800	else if (prev != next)
687	{	801	{
688	coro_stack *prev_stack = prev->stack;	802	coro_cctx *prev__cctx;
689		803
690	/* possibly "free" the stack */	804	if (prev->flags & CF_NEW)
691	if (prev_stack->idle_sp == stacklevel)
692	{	805	{
693	stack_put (prev_stack);	806	/* create a new empty context */
694	prev->stack = 0;	807	Newz (0, prev->cctx, 1, coro_cctx);
		808	prev->cctx->inuse = 1;
		809	prev->flags &= ~CF_NEW;
		810	prev->flags |= CF_RUNNING;
695	}	811	}
696		812
697	if (!next->mainstack)	813	/*TODO: must not croak here */
		814	if (!prev->flags & CF_RUNNING)
		815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		816
		817	if (next->flags & CF_RUNNING)
		818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		819
		820	if (next->flags & CF_DESTROYED)
		821	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		822
		823	prev->flags &= ~CF_RUNNING;
		824	next->flags |= CF_RUNNING;
		825
		826	LOCK;
		827
		828	if (next->flags & CF_NEW)
698	{	829	{
		830	/* need to start coroutine */
		831	next->flags &= ~CF_NEW;
699	/* first get rid of the old state */	832	/* first get rid of the old state */
700	SAVE (prev, -1);	833	save_perl (aTHX_ prev);
701	/* setup coroutine call */	834	/* setup coroutine call */
702	setup_coro (next);	835	setup_coro (aTHX_ next);
703	next->stack = 0;	836	/* need a new stack */
		837	assert (!next->cctx);
704	}	838	}
705	else	839	else
706	{	840	{
707	SAVE (prev, flags);	841	/* coroutine already started */
708	LOAD (next);	842	save_perl (aTHX_ prev);
		843	load_perl (aTHX_ next);
709	}	844	}
710		845
		846	prev__cctx = prev->cctx;
		847
		848	/* possibly "free" the cctx */
		849	if (prev__cctx->idle_sp == STACKLEVEL)
		850	{
		851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		853
		854	prev->cctx = 0;
		855
		856	cctx_put (prev__cctx);
		857	prev__cctx->inuse = 0;
		858	}
		859
711	if (!next->stack)	860	if (!next->cctx)
712	stack_get (next);	861	{
		862	next->cctx = cctx_get (aTHX);
		863	assert (!next->cctx->inuse);
		864	next->cctx->inuse = 1;
		865	}
713		866
714	if (prev_stack != next->stack)	867	if (prev__cctx != next->cctx)
		868	{
		869	prev__cctx->top_env = PL_top_env;
		870	PL_top_env = next->cctx->top_env;
715	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
716	}	872	}
717		873
718	transfer_tail ();	874	free_coro_mortal (aTHX);
		875	UNLOCK;
		876	}
719	}	877	}
720		878
721	/* use this function pointer to call the above function */	879	struct transfer_args
722	/* this is done to increase chances of the compiler not inlining the call */	880	{
723	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	881	struct coro *prev, *next;
		882	};
724		883
		884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		885
		886	/** high level stuff ********************************************************/
		887
725	static void	888	static int
726	coro_state_destroy (struct coro *coro)	889	coro_state_destroy (pTHX_ struct coro *coro)
727	{	890	{
728	if (coro->refcnt--)	891	if (coro->flags & CF_DESTROYED)
729	return;	892	return 0;
		893
		894	coro->flags |= CF_DESTROYED;
		895
		896	if (coro->flags & CF_READY)
		897	{
		898	/* reduce nready, as destroying a ready coro effectively unreadies it */
		899	/* alternative: look through all ready queues and remove the coro */
		900	LOCK;
		901	--coro_nready;
		902	UNLOCK;
		903	}
		904	else
		905	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
730		906
731	if (coro->mainstack && coro->mainstack != main_mainstack)	907	if (coro->mainstack && coro->mainstack != main_mainstack)
732	{	908	{
733	struct coro temp;	909	struct coro temp;
734		910
735	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	911	assert (!(coro->flags & CF_RUNNING));
		912
		913	Zero (&temp, 1, struct coro);
		914	temp.save = CORO_SAVE_ALL;
		915
		916	if (coro->flags & CF_RUNNING)
		917	croak ("FATAL: tried to destroy currently running coroutine");
		918
		919	save_perl (aTHX_ &temp);
736	LOAD (aTHX_ coro);	920	load_perl (aTHX_ coro);
737		921
738	destroy_stacks (aTHX);	922	coro_destroy_stacks (aTHX);
739		923
740	LOAD ((&temp)); /* this will get rid of defsv etc.. */	924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
741		925
742	coro->mainstack = 0;	926	coro->mainstack = 0;
743	}	927	}
744		928
745	stack_free (coro->stack);	929	cctx_destroy (coro->cctx);
746	SvREFCNT_dec (coro->args);	930	SvREFCNT_dec (coro->args);
747	Safefree (coro);	931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == first) first = coro->next;
		935
		936	return 1;
748	}	937	}
749		938
750	static int	939	static int
751	coro_state_clear (SV *sv, MAGIC *mg)	940	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
752	{	941	{
753	struct coro *coro = (struct coro *)mg->mg_ptr;	942	struct coro *coro = (struct coro *)mg->mg_ptr;
754	mg->mg_ptr = 0;	943	mg->mg_ptr = 0;
755		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
756	coro_state_destroy (coro);	949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
757		952
758	return 0;	953	return 0;
759	}	954	}
760		955
761	static int	956	static int
762	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	957	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
763	{	958	{
764	struct coro *coro = (struct coro *)mg->mg_ptr;	959	struct coro *coro = (struct coro *)mg->mg_ptr;
765		960
766	++coro->refcnt;	961	++coro->refcnt;
767		962
768	return 0;	963	return 0;
769	}	964	}
770		965
771	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	966	static MGVTBL coro_state_vtbl = {
		967	0, 0, 0, 0,
		968	coro_state_free,
		969	0,
		970	#ifdef MGf_DUP
		971	coro_state_dup,
		972	#else
		973	# define MGf_DUP 0
		974	#endif
		975	};
772		976
773	static struct coro *	977	static struct coro *
774	SvSTATE (SV *coro)	978	SvSTATE_ (pTHX_ SV *coro)
775	{	979	{
776	HV *stash;	980	HV *stash;
777	MAGIC *mg;	981	MAGIC *mg;
778		982
779	if (SvROK (coro))	983	if (SvROK (coro))
…		…
785	/* very slow, but rare, check */	989	/* very slow, but rare, check */
786	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
787	croak ("Coro::State object required");	991	croak ("Coro::State object required");
788	}	992	}
789		993
790	mg = SvMAGIC (coro);	994	mg = CORO_MAGIC (coro);
791	assert (mg->mg_type == PERL_MAGIC_ext);
792	return (struct coro *)mg->mg_ptr;	995	return (struct coro *)mg->mg_ptr;
793	}	996	}
794		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
795	static void	1000	static void
		1001	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1002	{
		1003	ta->prev = SvSTATE (prev_sv);
		1004	ta->next = SvSTATE (next_sv);
		1005	}
		1006
		1007	static void
796	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1008	api_transfer (SV *prev_sv, SV *next_sv)
797	{	1009	{
798	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1010	dTHX;
		1011	struct transfer_args ta;
		1012
		1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1014	TRANSFER (ta);
		1015	}
		1016
		1017	static int
		1018	api_save (SV *coro_sv, int new_save)
		1019	{
		1020	dTHX;
		1021	struct coro *coro = SvSTATE (coro_sv);
		1022	int old_save = coro->save;
		1023
		1024	if (new_save >= 0)
		1025	coro->save = new_save;
		1026
		1027	return old_save;
799	}	1028	}
800		1029
801	/** Coro ********************************************************************/	1030	/** Coro ********************************************************************/
802		1031
803	#define PRIO_MAX 3
804	#define PRIO_HIGH 1
805	#define PRIO_NORMAL 0
806	#define PRIO_LOW -1
807	#define PRIO_IDLE -3
808	#define PRIO_MIN -4
809
810	/* for Coro.pm */
811	static GV *coro_current, *coro_idle;
812	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;
814
815	static void	1032	static void
816	coro_enq (pTHX_ SV *sv)	1033	coro_enq (pTHX_ SV *coro_sv)
817	{	1034	{
818	int prio;
819
820	if (SvTYPE (sv) != SVt_PVHV)
821	croak ("Coro::ready tried to enqueue something that is not a coroutine");
822
823	prio = SvSTATE (sv)->prio;
824
825	av_push (coro_ready [prio - PRIO_MIN], sv);	1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
826	coro_nready++;
827	}	1036	}
828		1037
829	static SV *	1038	static SV *
830	coro_deq (pTHX_ int min_prio)	1039	coro_deq (pTHX_ int min_prio)
831	{	1040	{
…		…
835	if (min_prio < 0)	1044	if (min_prio < 0)
836	min_prio = 0;	1045	min_prio = 0;
837		1046
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (AvFILLp (coro_ready [prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready [prio]);	1049	return av_shift (coro_ready [prio]);
843	}
844		1050
845	return 0;	1051	return 0;
846	}	1052	}
847		1053
848	static void	1054	static int
849	api_ready (SV *coro)	1055	api_ready (SV *coro_sv)
850	{	1056	{
851	dTHX;	1057	dTHX;
		1058	struct coro *coro;
852		1059
853	if (SvROK (coro))	1060	if (SvROK (coro_sv))
854	coro = SvRV (coro);	1061	coro_sv = SvRV (coro_sv);
		1062
		1063	coro = SvSTATE (coro_sv);
		1064
		1065	if (coro->flags & CF_READY)
		1066	return 0;
		1067
		1068	coro->flags |= CF_READY;
855		1069
856	LOCK;	1070	LOCK;
857	coro_enq (aTHX_ SvREFCNT_inc (coro));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1072	++coro_nready;
858	UNLOCK;	1073	UNLOCK;
		1074
		1075	return 1;
		1076	}
		1077
		1078	static int
		1079	api_is_ready (SV *coro_sv)
		1080	{
		1081	dTHX;
		1082	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1083	}
		1084
		1085	static void
		1086	prepare_schedule (pTHX_ struct transfer_args *ta)
		1087	{
		1088	SV *prev_sv, *next_sv;
		1089
		1090	for (;;)
		1091	{
		1092	LOCK;
		1093	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1094
		1095	/* nothing to schedule: call the idle handler */
		1096	if (!next_sv)
		1097	{
		1098	dSP;
		1099	UNLOCK;
		1100
		1101	ENTER;
		1102	SAVETMPS;
		1103
		1104	PUSHMARK (SP);
		1105	PUTBACK;
		1106	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1107
		1108	FREETMPS;
		1109	LEAVE;
		1110	continue;
		1111	}
		1112
		1113	ta->next = SvSTATE (next_sv);
		1114
		1115	/* cannot transfer to destroyed coros, skip and look for next */
		1116	if (ta->next->flags & CF_DESTROYED)
		1117	{
		1118	UNLOCK;
		1119	SvREFCNT_dec (next_sv);
		1120	/* coro_nready is already taken care of by destroy */
		1121	continue;
		1122	}
		1123
		1124	--coro_nready;
		1125	UNLOCK;
		1126	break;
		1127	}
		1128
		1129	/* free this only after the transfer */
		1130	prev_sv = SvRV (coro_current);
		1131	SvRV_set (coro_current, next_sv);
		1132	ta->prev = SvSTATE (prev_sv);
		1133
		1134	assert (ta->next->flags & CF_READY);
		1135	ta->next->flags &= ~CF_READY;
		1136
		1137	LOCK;
		1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
		1140	UNLOCK;
		1141	}
		1142
		1143	static void
		1144	prepare_cede (pTHX_ struct transfer_args *ta)
		1145	{
		1146	api_ready (coro_current);
		1147	prepare_schedule (aTHX_ ta);
		1148	}
		1149
		1150	static int
		1151	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1152	{
		1153	if (coro_nready)
		1154	{
		1155	SV *prev = SvRV (coro_current);
		1156	prepare_schedule (aTHX_ ta);
		1157	api_ready (prev);
		1158	return 1;
		1159	}
		1160	else
		1161	return 0;
859	}	1162	}
860		1163
861	static void	1164	static void
862	api_schedule (void)	1165	api_schedule (void)
863	{	1166	{
864	dTHX;	1167	dTHX;
		1168	struct transfer_args ta;
865		1169
866	SV *prev, *next;	1170	prepare_schedule (aTHX_ &ta);
867	SV *current = GvSV (coro_current);	1171	TRANSFER (ta);
868
869	for (;;)
870	{
871	LOCK;
872
873	next = coro_deq (aTHX_ PRIO_MIN);
874
875	if (next)
876	break;
877
878	UNLOCK;
879
880	{
881	dSP;
882
883	ENTER;
884	SAVETMPS;
885
886	PUSHMARK (SP);
887	PUTBACK;
888	call_sv (GvSV (coro_idle), G_DISCARD);
889
890	FREETMPS;
891	LEAVE;
892	}
893	}
894
895	prev = SvRV (current);
896	SvRV (current) = next;
897
898	/* free this only after the transfer */
899	coro_mortal = prev;
900
901	UNLOCK;
902
903	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
904	}	1172	}
905		1173
906	static int coro_cede_self;
907
908	static void	1174	static int
909	api_cede (void)	1175	api_cede (void)
910	{	1176	{
911	dTHX;	1177	dTHX;
912	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1178	struct transfer_args ta;
913		1179
914	LOCK;	1180	prepare_cede (aTHX_ &ta);
915		1181
916	if (coro_cede_self)	1182	if (ta.prev != ta.next)
917	{	1183	{
918	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];	1184	TRANSFER (ta);
919	av_unshift (runqueue, 1);	1185	return 1;
920	av_store (runqueue, 0, current);
921	coro_nready++;
922	coro_cede_self = 0;
923	}	1186	}
924	else	1187	else
925	coro_enq (aTHX_ current);	1188	return 0;
		1189	}
926		1190
927	UNLOCK;	1191	static int
		1192	api_cede_notself (void)
		1193	{
		1194	dTHX;
		1195	struct transfer_args ta;
928		1196
929	api_schedule ();	1197	if (prepare_cede_notself (aTHX_ &ta))
		1198	{
		1199	TRANSFER (ta);
		1200	return 1;
		1201	}
		1202	else
		1203	return 0;
930	}	1204	}
931		1205
932	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
933		1207
934	PROTOTYPES: DISABLE	1208	PROTOTYPES: DISABLE
…		…
940	#endif	1214	#endif
941	BOOT_PAGESIZE;	1215	BOOT_PAGESIZE;
942		1216
943	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
944		1218
945	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
946	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
947	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1222	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
948		1226
949	main_mainstack = PL_mainstack;	1227	main_mainstack = PL_mainstack;
		1228	main_top_env = PL_top_env;
		1229
		1230	while (main_top_env->je_prev)
		1231	main_top_env = main_top_env->je_prev;
950		1232
951	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
952	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
953
954	Newz (0, main_stack, 1, coro_stack);
955	main_stack->idle_sp = (void *)-1;
956		1235
957	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
958	}	1237	}
959		1238
960	SV *	1239	SV *
…		…
965	HV *hv;	1244	HV *hv;
966	int i;	1245	int i;
967		1246
968	Newz (0, coro, 1, struct coro);	1247	Newz (0, coro, 1, struct coro);
969	coro->args = newAV ();	1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
		1250	coro->flags = CF_NEW;
970		1251
		1252	if (first) first->prev = coro;
		1253	coro->next = first;
		1254	first = coro;
		1255
971	hv = newHV ();	1256	coro->hv = hv = newHV ();
972	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1257	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
973	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
974		1259
975	av_push (coro->args, newSVsv (RETVAL));
976	for (i = 1; i < items; i++)	1260	for (i = 1; i < items; i++)
977	av_push (coro->args, newSVsv (ST (i)));	1261	av_push (coro->args, newSVsv (ST (i)));
978
979	coro->stack = main_stack;
980	/*coro->mainstack = 0; *//*actual work is done inside transfer */
981	/*coro->stack = 0;*/
982	}	1262	}
983	OUTPUT:	1263	OUTPUT:
984	RETVAL	1264	RETVAL
985		1265
		1266	int
		1267	save (SV *coro, int new_save = -1)
		1268	CODE:
		1269	RETVAL = api_save (coro, new_save);
		1270	OUTPUT:
		1271	RETVAL
		1272
		1273	int
		1274	save_also (SV *coro_sv, int save_also)
		1275	CODE:
		1276	{
		1277	struct coro *coro = SvSTATE (coro_sv);
		1278	RETVAL = coro->save;
		1279	coro->save |= save_also;
		1280	}
		1281	OUTPUT:
		1282	RETVAL
		1283
986	void	1284	void
987	transfer (prev, next, flags)	1285	_set_stacklevel (...)
988	SV *prev	1286	ALIAS:
989	SV *next	1287	Coro::State::transfer = 1
990	int flags	1288	Coro::schedule = 2
		1289	Coro::cede = 3
		1290	Coro::cede_notself = 4
991	CODE:	1291	CODE:
992	PUTBACK;
993	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
994	SPAGAIN;
995
996	int
997	prio (Coro::State coro, int newprio = 0)
998	ALIAS:
999	nice = 1
1000	CODE:
1001	{	1292	{
1002	RETVAL = coro->prio;	1293	struct transfer_args ta;
1003		1294
1004	if (items > 1)	1295	switch (ix)
1005	{	1296	{
		1297	case 0:
		1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1299	ta.next = 0;
		1300	break;
		1301
		1302	case 1:
1006	if (ix)	1303	if (items != 2)
1007	newprio += coro->prio;	1304	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1008		1305
1009	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1010	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1307	break;
1011		1308
1012	coro->prio = newprio;	1309	case 2:
		1310	prepare_schedule (aTHX_ &ta);
		1311	break;
		1312
		1313	case 3:
		1314	prepare_cede (aTHX_ &ta);
		1315	break;
		1316
		1317	case 4:
		1318	if (!prepare_cede_notself (aTHX_ &ta))
		1319	XSRETURN_EMPTY;
		1320
		1321	break;
1013	}	1322	}
1014	}
1015		1323
1016	void	1324	BARRIER;
1017	_clear_idle_sp (Coro::State self)	1325	TRANSFER (ta);
		1326
		1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
1018	CODE:	1333	CODE:
1019	self->stack->idle_sp = 0;	1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1020		1335	OUTPUT:
1021	void	1336	RETVAL
1022	_clone_state_from (SV *dst, SV *src)
1023	CODE:
1024	{
1025	struct coro *coro_src = SvSTATE (src);
1026
1027	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028
1029	++coro_src->refcnt;
1030	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1031	}
1032		1337
1033	void	1338	void
1034	_exit (code)	1339	_exit (code)
1035	int code	1340	int code
1036	PROTOTYPE: $	1341	PROTOTYPE: $
1037	CODE:	1342	CODE:
1038	_exit (code);	1343	_exit (code);
1039		1344
1040	MODULE = Coro::State PACKAGE = Coro::Cont	1345	int
		1346	cctx_stacksize (int new_stacksize = 0)
		1347	CODE:
		1348	RETVAL = coro_stacksize;
		1349	if (new_stacksize)
		1350	coro_stacksize = new_stacksize;
		1351	OUTPUT:
		1352	RETVAL
		1353
		1354	int
		1355	cctx_count ()
		1356	CODE:
		1357	RETVAL = cctx_count;
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
		1362	cctx_idle ()
		1363	CODE:
		1364	RETVAL = cctx_idle;
		1365	OUTPUT:
		1366	RETVAL
1041		1367
1042	void	1368	void
1043	yield (...)	1369	list ()
1044	PROTOTYPE: @	1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = first; coro; coro = coro->next)
		1374	if (coro->hv)
		1375	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1376	}
		1377
		1378	void
		1379	_eval (Coro::State coro, SV *coderef)
		1380	CODE:
		1381	{
		1382	if (coro->mainstack)
		1383	{
		1384	struct coro temp;
		1385	Zero (&temp, 1, struct coro);
		1386	temp.save = CORO_SAVE_ALL;
		1387
		1388	if (!(coro->flags & CF_RUNNING))
		1389	{
		1390	save_perl (aTHX_ &temp);
		1391	load_perl (aTHX_ coro);
		1392	}
		1393
		1394	{
		1395	dSP;
		1396	ENTER;
		1397	SAVETMPS;
		1398	PUSHMARK (SP);
		1399	PUTBACK;
		1400	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1401	SPAGAIN;
		1402	FREETMPS;
		1403	LEAVE;
		1404	PUTBACK;
		1405	}
		1406
		1407	if (!(coro->flags & CF_RUNNING))
		1408	{
		1409	save_perl (aTHX_ coro);
		1410	load_perl (aTHX_ &temp);
		1411	}
		1412	}
		1413	}
		1414
		1415	SV *
		1416	is_ready (Coro::State coro)
		1417	PROTOTYPE: $
		1418	ALIAS:
		1419	is_ready = CF_READY
		1420	is_running = CF_RUNNING
		1421	is_new = CF_NEW
		1422	is_destroyed = CF_DESTROYED
		1423	CODE:
		1424	RETVAL = boolSV (coro->flags & ix);
		1425	OUTPUT:
		1426	RETVAL
		1427
		1428	IV
		1429	rss (Coro::State coro)
		1430	PROTOTYPE: $
1045	CODE:	1431	CODE:
1046	{	1432	RETVAL = coro_rss (coro);
1047	SV *yieldstack;	1433	OUTPUT:
1048	SV *sv;	1434	RETVAL
1049	AV *defav = GvAV (PL_defgv);
1050	struct coro *prev, *next;
1051		1435
1052	yieldstack = *hv_fetch (
1053	(HV *)SvRV (GvSV (coro_current)),
1054	"yieldstack", sizeof ("yieldstack") - 1,
1055	0
1056	);
1057
1058	/* set up @_ -- ugly */
1059	av_clear (defav);
1060	av_fill (defav, items - 1);
1061	while (items--)
1062	av_store (defav, items, SvREFCNT_inc (ST(items)));
1063
1064	sv = av_pop ((AV *)SvRV (yieldstack));
1065	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1066	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1067	SvREFCNT_dec (sv);
1068
1069	coro_state_transfer (aTHX_ prev, next, 0);
1070	}
1071		1436
1072	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1073		1438
1074	BOOT:	1439	BOOT:
1075	{	1440	{
…		…
1082	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086		1451
1087	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1088	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1089		1454
1090	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1092		1457
1093	{	1458	{
1094	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1095		1460
1096	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
1097	coroapi.cede = api_cede;	1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1098	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
		1466	coroapi.is_ready = api_is_ready;
1099	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1100	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1101		1469
1102	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1103	sv_setiv (sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1104	SvREADONLY_on (sv);	1472	SvREADONLY_on (sv);
1105	}	1473	}
1106	}	1474	}
1107		1475
1108	void	1476	void
		1477	_set_current (SV *current)
		1478	PROTOTYPE: $
		1479	CODE:
		1480	SvREFCNT_dec (SvRV (coro_current));
		1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1482
		1483	int
		1484	prio (Coro::State coro, int newprio = 0)
		1485	ALIAS:
		1486	nice = 1
		1487	CODE:
		1488	{
		1489	RETVAL = coro->prio;
		1490
		1491	if (items > 1)
		1492	{
		1493	if (ix)
		1494	newprio = coro->prio - newprio;
		1495
		1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1498
		1499	coro->prio = newprio;
		1500	}
		1501	}
		1502	OUTPUT:
		1503	RETVAL
		1504
		1505	SV *
1109	ready (SV *self)	1506	ready (SV *self)
1110	PROTOTYPE: $	1507	PROTOTYPE: $
1111	CODE:	1508	CODE:
1112	api_ready (self);	1509	RETVAL = boolSV (api_ready (self));
		1510	OUTPUT:
		1511	RETVAL
1113		1512
1114	int	1513	int
1115	nready (...)	1514	nready (...)
1116	PROTOTYPE:	1515	PROTOTYPE:
1117	CODE:	1516	CODE:
1118	RETVAL = coro_nready;	1517	RETVAL = coro_nready;
1119	OUTPUT:	1518	OUTPUT:
1120	RETVAL	1519	RETVAL
1121		1520
1122	void
1123	schedule (...)
1124	PROTOTYPE:
1125	CODE:
1126	api_schedule ();
1127
1128	void
1129	_set_cede_self ()
1130	CODE:
1131	coro_cede_self = 1;
1132
1133	void
1134	cede (...)
1135	PROTOTYPE:
1136	CODE:
1137	api_cede ();
1138
1139	MODULE = Coro::State PACKAGE = Coro::AIO	1521	MODULE = Coro::State PACKAGE = Coro::AIO
1140		1522
1141	SV *	1523	SV *
1142	_get_state ()	1524	_get_state ()
1143	CODE:	1525	CODE:
1144	{	1526	{
1145	struct {	1527	struct io_state *data;
1146	int errorno;
1147	int laststype;
1148	int laststatval;
1149	Stat_t statcache;
1150	} data;
1151		1528
		1529	RETVAL = newSV (sizeof (struct io_state));
		1530	data = (struct io_state *)SvPVX (RETVAL);
		1531	SvCUR_set (RETVAL, sizeof (struct io_state));
		1532	SvPOK_only (RETVAL);
		1533
1152	data.errorno = errno;	1534	data->errorno = errno;
1153	data.laststype = PL_laststype;	1535	data->laststype = PL_laststype;
1154	data.laststatval = PL_laststatval;	1536	data->laststatval = PL_laststatval;
1155	data.statcache = PL_statcache;	1537	data->statcache = PL_statcache;
1156
1157	RETVAL = newSVpvn ((char *)&data, sizeof data);
1158	}	1538	}
1159	OUTPUT:	1539	OUTPUT:
1160	RETVAL	1540	RETVAL
1161		1541
1162	void	1542	void
1163	_set_state (char *data_)	1543	_set_state (char *data_)
1164	PROTOTYPE: $	1544	PROTOTYPE: $
1165	CODE:	1545	CODE:
1166	{	1546	{
1167	struct {	1547	struct io_state *data = (void *)data_;
1168	int errorno;
1169	int laststype;
1170	int laststatval;
1171	Stat_t statcache;
1172	} *data = (void *)data_;
1173		1548
1174	errno = data->errorno;	1549	errno = data->errorno;
1175	PL_laststype = data->laststype;	1550	PL_laststype = data->laststype;
1176	PL_laststatval = data->laststatval;	1551	PL_laststatval = data->laststatval;
1177	PL_statcache = data->statcache;	1552	PL_statcache = data->statcache;
1178	}	1553	}
		1554

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