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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.96 by root, Sun Nov 26 18:25:11 2006 UTC vs.
Revision 1.146 by root, Sat Mar 17 19:51:57 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 <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
34		79
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	81	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	82	#endif
53	# include <limits.h>	83
54	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
61	#endif	91	#endif
62		92
63	/* 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
64	* 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
65	* and should be unique. */	95	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&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
		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))
		110
71	#include "CoroAPI.h"	111	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		112
75	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
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 */
86	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
88		136
		137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
89	/* this is a structure representing a c-level coroutine */	140	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	141	typedef struct coro_cctx {
91	struct coro_stack *next;	142	struct coro_cctx *next;
92		143
93	/* the stack */	144	/* the stack */
94	void *sptr;	145	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
96		147
97	/* cpu state */	148	/* cpu state */
98	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	151	JMPENV *top_env;
100	coro_context cctx;	152	coro_context cctx;
101	} coro_stack;	153
		154	#if CORO_USE_VALGRIND
		155	int valgrind_id;
		156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
102		166
103	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
104	struct coro {	168	struct coro {
105	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	170	coro_cctx *cctx;
107		171
108	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
109	AV *args;	173	AV *args;
110	int refcnt;	174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
111		177
112	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
113	AV *defav;	179	AV *defav; /* @_ */
114	SV *defsv;	180	SV *defsv; /* $_ */
115	SV *errsv;	181	SV *errsv; /* $@ */
		182	SV *irssv; /* $/ */
		183	SV *irssv_sv; /* real $/ cache */
116		184
117	/* saved global state not related to stacks */	185	#define VAR(name,type) type name;
118	U8 dowarn;	186	# include "state.h"
119	I32 in_eval;	187	#undef VAR
120
121	/* the stacks and related info (callchain etc..) */
122	PERL_SI *curstackinfo;
123	AV *curstack;
124	AV *mainstack;
125	SV **stack_sp;
126	OP *op;
127	SV **curpad;
128	AV *comppad;
129	CV *compcv;
130	SV **stack_base;
131	SV **stack_max;
132	SV **tmps_stack;
133	I32 tmps_floor;
134	I32 tmps_ix;
135	I32 tmps_max;
136	I32 *markstack;
137	I32 *markstack_ptr;
138	I32 *markstack_max;
139	I32 *scopestack;
140	I32 scopestack_ix;
141	I32 scopestack_max;
142	ANY *savestack;
143	I32 savestack_ix;
144	I32 savestack_max;
145	OP **retstack;
146	I32 retstack_ix;
147	I32 retstack_max;
148	PMOP *curpm;
149	COP *curcop;
150		188
151	/* coro process data */	189	/* coro process data */
152	int prio;	190	int prio;
153	};	191	};
154		192
155	typedef struct coro *Coro__State;	193	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	194	typedef struct coro *Coro__State_or_hashref;
157		195
		196	/** Coro ********************************************************************/
		197
		198	#define PRIO_MAX 3
		199	#define PRIO_HIGH 1
		200	#define PRIO_NORMAL 0
		201	#define PRIO_LOW -1
		202	#define PRIO_IDLE -3
		203	#define PRIO_MIN -4
		204
		205	/* for Coro.pm */
		206	static SV *coro_current;
		207	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		208	static int coro_nready;
		209
		210	/** lowlevel stuff **********************************************************/
		211
158	static AV *	212	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	213	coro_clone_padlist (pTHX_ CV *cv)
160	{	214	{
161	AV *padlist = CvPADLIST (cv);	215	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	216	AV *newpadlist, *newpad;
163		217
164	newpadlist = newAV ();	218	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	219	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	220	#if PERL_VERSION_ATLEAST (5,9,0)
		221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		222	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	224	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	225	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	226	--AvFILLp (padlist);
173		227
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	228	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		272
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	273	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		274
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	275	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		276
		277	#define CORO_MAGIC(cv) \
		278	SvMAGIC (cv) \
		279	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		280	? SvMAGIC (cv) \
		281	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		282	: 0
		283
223	/* the next two functions merely cache the padlists */	284	/* the next two functions merely cache the padlists */
224	static void	285	static void
225	get_padlist (pTHX_ CV *cv)	286	get_padlist (pTHX_ CV *cv)
226	{	287	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
228		290
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	293	else
232	{	294	{
233	#if 0	295	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this is probably cleaner, but also slower? */	296	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	297	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	298	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	299	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	300	SvREFCNT_dec (cp);
239	#else	301	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	302	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	305	}
244		306
245	static void	307	static void
246	put_padlist (pTHX_ CV *cv)	308	put_padlist (pTHX_ CV *cv)
247	{	309	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	310	MAGIC *mg = CORO_MAGIC (cv);
		311	AV *av;
249		312
250	if (!mg)	313	if (!mg)
251	{	314	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	315	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	317	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	318	mg->mg_obj = (SV *)newAV ();
256	}	319	}
257		320
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	321	av = (AV *)mg->mg_obj;
		322
		323	if (AvFILLp (av) >= AvMAX (av))
		324	av_extend (av, AvMAX (av) + 1);
		325
		326	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	327	}
		328
		329	/** load & save, init *******************************************************/
260		330
261	#define SB do {	331	#define SB do {
262	#define SE } while (0)	332	#define SE } while (0)
263		333
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	334	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		335
269	static void	336	static void
270	load_state(pTHX_ Coro__State c)	337	load_perl (pTHX_ Coro__State c)
271	{	338	{
272	PL_dowarn = c->dowarn;	339	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	340	# include "state.h"
274		341	#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		342
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	343	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	344	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	345	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		346	if (c->irssv)
		347	{
		348	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		349	SvREFCNT_dec (c->irssv);
		350	else
		351	{
		352	REPLACE_SV (PL_rs, c->irssv);
		353	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		354	sv_setsv (c->irssv_sv, PL_rs);
		355	}
		356	}
309		357
310	{	358	{
311	dSP;	359	dSP;
312	CV *cv;	360	CV *cv;
313		361
314	/* now do the ugly restore mess */	362	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	363	while ((cv = (CV *)POPs))
316	{	364	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	365	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	366	CvDEPTH (cv) = PTR2IV (POPs);
323	}	367	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	368	}
327		369
328	PUTBACK;	370	PUTBACK;
329	}	371	}
		372	assert (!PL_comppad || AvARRAY (PL_comppad));//D
330	}	373	}
331		374
332	static void	375	static void
333	save_state(pTHX_ Coro__State c, int flags)	376	save_perl (pTHX_ Coro__State c)
334	{	377	{
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
335	{	379	{
336	dSP;	380	dSP;
337	I32 cxix = cxstack_ix;	381	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	382	PERL_CONTEXT *ccstk = cxstack;
339	PERL_SI *top_si = PL_curstackinfo;	383	PERL_SI *top_si = PL_curstackinfo;
…		…
341	/*	385	/*
342	* the worst thing you can imagine happens first - we have to save	386	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	387	* (and reinitialize) all cv's in the whole callchain :(
344	*/	388	*/
345		389
		390	EXTEND (SP, 3 + 1);
346	PUSHs (Nullsv);	391	PUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	392	/* this loop was inspired by pp_caller */
348	for (;;)	393	for (;;)
349	{	394	{
350	while (cxix >= 0)	395	while (cxix >= 0)
351	{	396	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	397	PERL_CONTEXT *cx = &ccstk[cxix--];
353		398
354	if (CxTYPE(cx) == CXt_SUB)	399	if (CxTYPE (cx) == CXt_SUB)
355	{	400	{
356	CV *cv = cx->blk_sub.cv;	401	CV *cv = cx->blk_sub.cv;
		402
357	if (CvDEPTH(cv))	403	if (CvDEPTH (cv))
358	{	404	{
359	EXTEND (SP, CvDEPTH(cv)*2);	405	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	406	PUSHs ((SV *)CvPADLIST (cv));
		407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	408	PUSHs ((SV *)cv);
370		409
		410	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	411	get_padlist (aTHX_ cv);
372	}	412	}
373	}	413	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	414	}
383		415
384	if (top_si->si_type == PERLSI_MAIN)	416	if (top_si->si_type == PERLSI_MAIN)
385	break;	417	break;
386		418
…		…
390	}	422	}
391		423
392	PUTBACK;	424	PUTBACK;
393	}	425	}
394		426
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	427	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	429	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		430	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
398		431
399	c->dowarn = PL_dowarn;	432	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	433	# include "state.h"
401		434	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	}	435	}
433		436
434	/*	437	/*
435	* allocate various perl stacks. This is an exact copy	438	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	439	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	440	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	441	* not usually need a lot of stackspace.
439	*/	442	*/
		443	#if CORO_PREFER_PERL_FUNCTIONS
		444	# define coro_init_stacks init_stacks
		445	#else
440	static void	446	static void
441	coro_init_stacks (pTHX)	447	coro_init_stacks (pTHX)
442	{	448	{
443	LOCK;
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
446	PL_curstackinfo->si_type = PERLSI_MAIN;	450	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	451	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		453
450	PL_stack_base = AvARRAY(PL_curstack);	454	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	455	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		457
454	New(50,PL_tmps_stack,96,SV*);	458	New(50,PL_tmps_stack,128,SV*);
455	PL_tmps_floor = -1;	459	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	460	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	461	PL_tmps_max = 128;
458		462
459	New(54,PL_markstack,16,I32);	463	New(54,PL_markstack,32,I32);
460	PL_markstack_ptr = PL_markstack;	464	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	465	PL_markstack_max = PL_markstack + 32;
462		466
463	#ifdef SET_MARK_OFFSET	467	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	468	SET_MARK_OFFSET;
465	#endif	469	#endif
466		470
467	New(54,PL_scopestack,16,I32);	471	New(54,PL_scopestack,32,I32);
468	PL_scopestack_ix = 0;	472	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	473	PL_scopestack_max = 32;
470		474
471	New(54,PL_savestack,96,ANY);	475	New(54,PL_savestack,64,ANY);
472	PL_savestack_ix = 0;	476	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	477	PL_savestack_max = 64;
474		478
475	#if PERL_VERSION < 9	479	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	480	New(54,PL_retstack,16,OP*);
477	PL_retstack_ix = 0;	481	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	482	PL_retstack_max = 16;
479	#endif	483	#endif
480
481	UNLOCK;
482	}	484	}
		485	#endif
483		486
484	/*	487	/*
485	* destroy the stacks, the callchain etc...	488	* destroy the stacks, the callchain etc...
486	*/	489	*/
487	static void	490	static void
488	destroy_stacks(pTHX)	491	coro_destroy_stacks (pTHX)
489	{	492	{
490	if (!IN_DESTRUCT)	493	if (!IN_DESTRUCT)
491	{	494	{
492	/* is this ugly, I ask? */	495	/* restore all saved variables and stuff */
493	LEAVE_SCOPE (0);	496	LEAVE_SCOPE (0);
		497	assert (PL_tmps_floor == -1);
494		498
495	/* sure it is, but more important: is it correct?? :/ */	499	/* free all temporaries */
496	FREETMPS;	500	FREETMPS;
		501	assert (PL_tmps_ix == -1);
497		502
		503	/* unwind all extra stacks */
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	504	POPSTACK_TO (PL_mainstack);
		505
		506	/* unwind main stack */
		507	dounwind (-1);
499	}	508	}
500		509
501	while (PL_curstackinfo->si_next)	510	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	511	PL_curstackinfo = PL_curstackinfo->si_next;
503		512
504	while (PL_curstackinfo)	513	while (PL_curstackinfo)
505	{	514	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	515	PERL_SI *p = PL_curstackinfo->si_prev;
507		516
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	517	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	518	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		519
520	Safefree (PL_curstackinfo->si_cxstack);	520	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	521	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	522	PL_curstackinfo = p;
523	}	523	}
524		524
525	Safefree (PL_tmps_stack);	525	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	526	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	527	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	528	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	529	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	530	Safefree (PL_retstack);
531	#endif	531	#endif
532	}	532	}
533		533
		534	/** coroutine stack handling ************************************************/
		535
534	static void	536	static void
535	setup_coro (struct coro *coro)	537	setup_coro (pTHX_ struct coro *coro)
536	{	538	{
537	/*	539	/*
538	* emulate part of the perl startup here.	540	* emulate part of the perl startup here.
539	*/	541	*/
540	dTHX;	542	coro_init_stacks (aTHX);
		543
		544	PL_curcop = &PL_compiling;
		545	PL_in_eval = EVAL_NULL;
		546	PL_comppad = 0;
		547	PL_curpm = 0;
		548	PL_localizing = 0;
		549	PL_dirty = 0;
		550	PL_restartop = 0;
		551
		552	{
		553	dSP;
		554	LOGOP myop;
		555
		556	SvREFCNT_dec (GvAV (PL_defgv));
		557	GvAV (PL_defgv) = coro->args; coro->args = 0;
		558
		559	Zero (&myop, 1, LOGOP);
		560	myop.op_next = Nullop;
		561	myop.op_flags = OPf_WANT_VOID;
		562
		563	PUSHMARK (SP);
		564	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		565	PUTBACK;
		566	PL_op = (OP *)&myop;
		567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		568	SPAGAIN;
		569	}
		570
		571	ENTER; /* necessary e.g. for dounwind */
		572	}
		573
		574	static void
		575	free_coro_mortal (pTHX)
		576	{
		577	if (coro_mortal)
		578	{
		579	SvREFCNT_dec (coro_mortal);
		580	coro_mortal = 0;
		581	}
		582	}
		583
		584	/* inject a fake call to Coro::State::_cctx_init into the execution */
		585	static void NOINLINE
		586	prepare_cctx (pTHX_ coro_cctx *cctx)
		587	{
541	dSP;	588	dSP;
542	UNOP myop;	589	LOGOP myop;
543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544		590
545	coro_init_stacks (aTHX);
546	/*PL_curcop = 0;*/
547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
548	SvREFCNT_dec (GvAV (PL_defgv));
549	GvAV (PL_defgv) = coro->args; coro->args = 0;
550
551	SPAGAIN;
552
553	Zero (&myop, 1, UNOP);	591	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	592	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	593	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556		594
		595	PUSHMARK (SP);
		596	EXTEND (SP, 2);
		597	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		598	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		599	PUTBACK;
557	PL_op = (OP *)&myop;	600	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	601	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	602	SPAGAIN;
564
565	ENTER; /* necessary e.g. for dounwind */
566	}
567
568	static void
569	free_coro_mortal ()
570	{
571	if (coro_mortal)
572	{
573	SvREFCNT_dec (coro_mortal);
574	coro_mortal = 0;
575	}
576	}	603	}
577		604
578	static void	605	static void
579	coro_run (void *arg)	606	coro_run (void *arg)
580	{	607	{
		608	dTHX;
		609
		610	/* coro_run is the alternative tail of transfer(), so unlock here. */
		611	UNLOCK;
		612
581	/*	613	/*
582	* this is a _very_ stripped down perl interpreter ;)	614	* this is a _very_ stripped down perl interpreter ;)
583	*/	615	*/
584	dTHX;
585	int ret;
586
587	UNLOCK;
588
589	PL_top_env = &PL_start_env;	616	PL_top_env = &PL_start_env;
590		617
591	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	618	/* inject call to cctx_init */
592	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	619	prepare_cctx (aTHX_ (coro_cctx *)arg);
593
594	/* continue at cctx_init, without entersub */
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596		620
597	/* somebody will hit me for both perl_run and PL_restartop */	621	/* somebody will hit me for both perl_run and PL_restartop */
598	ret = perl_run (aTHX_ PERL_GET_CONTEXT);	622	PL_restartop = PL_op;
599	printf ("ret %d\n", ret);//D	623	perl_run (PL_curinterp);
600		624
601	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	625	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
602	abort ();	626	abort ();
603	}	627	}
604		628
605	static coro_stack *	629	static coro_cctx *
606	stack_new ()	630	cctx_new ()
607	{	631	{
608	coro_stack *stack;	632	coro_cctx *cctx;
		633	void *stack_start;
		634	size_t stack_size;
609		635
		636	++cctx_count;
		637
610	New (0, stack, 1, coro_stack);	638	Newz (0, cctx, 1, coro_cctx);
611		639
612	#if HAVE_MMAP	640	#if HAVE_MMAP
613		641
614	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	642	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
615	/* mmap suppsedly does allocate-on-write for us */	643	/* mmap supposedly does allocate-on-write for us */
616	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	644	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617		645
618	if (stack->sptr == (void *)-1)	646	if (cctx->sptr != (void *)-1)
619	{
620	perror ("FATAL: unable to mmap stack for coroutine");
621	_exit (EXIT_FAILURE);
622	}	647	{
623
624	# if STACKGUARD	648	# if CORO_STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
626	# endif	650	# endif
627		651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
628	#else	652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
629		653	cctx->mapped = 1;
630	stack->ssize = STACKSIZE * (long)sizeof (long);
631	New (0, stack->sptr, STACKSIZE, long);
632
633	if (!stack->sptr)
634	{	654	}
		655	else
		656	#endif
		657	{
		658	cctx->ssize = coro_stacksize * (long)sizeof (long);
		659	New (0, cctx->sptr, coro_stacksize, long);
		660
		661	if (!cctx->sptr)
		662	{
635	perror (stderr, "FATAL: unable to malloc stack for coroutine");	663	perror ("FATAL: unable to allocate stack for coroutine");
636	_exit (EXIT_FAILURE);	664	_exit (EXIT_FAILURE);
637	}	665	}
638		666
639	#endif	667	stack_start = cctx->sptr;
		668	stack_size = cctx->ssize;
		669	}
640		670
		671	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
641	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	672	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
642		673
643	return stack;	674	return cctx;
644	}	675	}
645		676
646	static void	677	static void
647	stack_free (coro_stack *stack)	678	cctx_destroy (coro_cctx *cctx)
648	{	679	{
649	if (!stack)	680	if (!cctx)
650	return;	681	return;
651		682
		683	--cctx_count;
		684
		685	#if CORO_USE_VALGRIND
		686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		687	#endif
		688
652	#if HAVE_MMAP	689	#if HAVE_MMAP
		690	if (cctx->mapped)
653	munmap (stack->sptr, stack->ssize);	691	munmap (cctx->sptr, cctx->ssize);
654	#else
655	Safefree (stack->sptr);
656	#endif
657
658	Safefree (stack);
659	}
660
661	static coro_stack *stack_first;
662
663	static coro_stack *
664	stack_get ()
665	{
666	coro_stack *stack;
667
668	if (stack_first)
669	{
670	stack = stack_first;
671	stack_first = stack->next;
672	}
673	else	692	else
		693	#endif
		694	Safefree (cctx->sptr);
		695
		696	Safefree (cctx);
		697	}
		698
		699	static coro_cctx *
		700	cctx_get (pTHX)
		701	{
		702	while (cctx_first)
674	{	703	{
675	stack = stack_new ();	704	coro_cctx *cctx = cctx_first;
		705	cctx_first = cctx->next;
		706	--cctx_idle;
		707
		708	if (cctx->ssize >= coro_stacksize)
		709	return cctx;
		710
		711	cctx_destroy (cctx);
		712	}
		713
676	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
		715	return cctx_new ();
		716	}
		717
		718	static void
		719	cctx_put (coro_cctx *cctx)
		720	{
		721	/* free another cctx if overlimit */
		722	if (cctx_idle >= MAX_IDLE_CCTX)
		723	{
		724	coro_cctx *first = cctx_first;
		725	cctx_first = first->next;
		726	--cctx_idle;
		727
		728	assert (!first->inuse);
		729	cctx_destroy (first);
677	}	730	}
678		731
679	return stack;	732	++cctx_idle;
		733	cctx->next = cctx_first;
		734	cctx_first = cctx;
680	}	735	}
681		736
682	static void	737	/** coroutine switching *****************************************************/
683	stack_put (coro_stack *stack)
684	{
685	stack->next = stack_first;
686	stack_first = stack;
687	}
688		738
689	/* never call directly, always through the coro_state_transfer global variable */	739	/* never call directly, always through the coro_state_transfer global variable */
690	static void	740	static void NOINLINE
691	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	741	transfer (pTHX_ struct coro *prev, struct coro *next)
692	{	742	{
693	dSTACKLEVEL;	743	dSTACKLEVEL;
694		744
695	/* sometimes transfer is only called to set idle_sp */	745	/* sometimes transfer is only called to set idle_sp */
696	if (flags == TRANSFER_SET_STACKLEVEL)	746	if (!next)
		747	{
697	((coro_stack *)prev)->idle_sp = STACKLEVEL;	748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		749	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		750	}
698	else if (prev != next)	751	else if (prev != next)
699	{	752	{
700	coro_stack *prev__stack;	753	coro_cctx *prev__cctx;
		754
		755	if (prev->flags & CF_NEW)
		756	{
		757	/* create a new empty context */
		758	Newz (0, prev->cctx, 1, coro_cctx);
		759	prev->cctx->inuse = 1;
		760	prev->flags &= ~CF_NEW;
		761	prev->flags |= CF_RUNNING;
		762	}
		763
		764	/*TODO: must not croak here */
		765	if (!prev->flags & CF_RUNNING)
		766	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		767
		768	if (next->flags & CF_RUNNING)
		769	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		770
		771	if (next->flags & CF_DESTROYED)
		772	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		773
		774	prev->flags &= ~CF_RUNNING;
		775	next->flags |= CF_RUNNING;
701		776
702	LOCK;	777	LOCK;
703		778
704	if (next->mainstack)	779	if (next->flags & CF_NEW)
705	{	780	{
706	/* coroutine already started */	781	/* need to start coroutine */
707	SAVE (prev, flags);	782	next->flags &= ~CF_NEW;
708	LOAD (next);	783	/* first get rid of the old state */
		784	save_perl (aTHX_ prev);
		785	/* setup coroutine call */
		786	setup_coro (aTHX_ next);
		787	/* need a new stack */
		788	assert (!next->cctx);
709	}	789	}
710	else	790	else
711	{	791	{
712	/* need to start coroutine */	792	/* coroutine already started */
713	/* first get rid of the old state */	793	save_perl (aTHX_ prev);
714	SAVE (prev, -1);	794	load_perl (aTHX_ next);
715	/* setup coroutine call */
716	setup_coro (next);
717	/* need a stack */
718	next->stack = 0;
719	}	795	}
720		796
721	if (!prev->stack)
722	/* create a new empty context */
723	Newz (0, prev->stack, 1, coro_stack);
724
725	prev__stack = prev->stack;	797	prev__cctx = prev->cctx;
726		798
727	/* possibly "free" the stack */	799	/* possibly "free" the cctx */
728	if (prev__stack->idle_sp == STACKLEVEL)	800	if (prev__cctx->idle_sp == STACKLEVEL)
729	{	801	{
730	stack_put (prev__stack);	802	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		803	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		804
731	prev->stack = 0;	805	prev->cctx = 0;
		806
		807	cctx_put (prev__cctx);
		808	prev__cctx->inuse = 0;
732	}	809	}
733		810
734	if (!next->stack)	811	if (!next->cctx)
735	next->stack = stack_get ();
736
737	if (prev__stack != next->stack)
738	{	812	{
739	prev__stack->top_env = PL_top_env;	813	next->cctx = cctx_get (aTHX);
740	PL_top_env = next->stack->top_env;	814	assert (!next->cctx->inuse);
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	815	next->cctx->inuse = 1;
742	}	816	}
743		817
		818	if (prev__cctx != next->cctx)
		819	{
		820	prev__cctx->top_env = PL_top_env;
		821	PL_top_env = next->cctx->top_env;
		822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		823	}
		824
744	free_coro_mortal ();	825	free_coro_mortal (aTHX);
745
746	UNLOCK;	826	UNLOCK;
747	}	827	}
748	}	828	}
749		829
750	/* use this function pointer to call the above function */
751	/* this is done to increase chances of the compiler not inlining the call */
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755	struct transfer_args	830	struct transfer_args
756	{	831	{
757	struct coro *prev, *next;	832	struct coro *prev, *next;
758	int flags;
759	};	833	};
760		834
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
762		836
		837	/** high level stuff ********************************************************/
		838
763	static void	839	static int
764	coro_state_destroy (struct coro *coro)	840	coro_state_destroy (pTHX_ struct coro *coro)
765	{	841	{
766	if (coro->refcnt--)	842	if (coro->flags & CF_DESTROYED)
767	return;	843	return 0;
		844
		845	coro->flags |= CF_DESTROYED;
		846
		847	if (coro->flags & CF_READY)
		848	{
		849	/* reduce nready, as destroying a ready coro effectively unreadies it */
		850	/* alternative: look through all ready queues and remove the coro */
		851	LOCK;
		852	--coro_nready;
		853	UNLOCK;
		854	}
		855	else
		856	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768		857
769	if (coro->mainstack && coro->mainstack != main_mainstack)	858	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	859	{
771	struct coro temp;	860	struct coro temp;
772		861
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	862	assert (!(coro->flags & CF_RUNNING));
		863
		864	Zero (&temp, 1, struct coro);
		865	temp.save = CORO_SAVE_ALL;
		866
		867	if (coro->flags & CF_RUNNING)
		868	croak ("FATAL: tried to destroy currently running coroutine");
		869
		870	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	871	load_perl (aTHX_ coro);
775		872
776	destroy_stacks (aTHX);	873	coro_destroy_stacks (aTHX);
777		874
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
779		876
780	coro->mainstack = 0;	877	coro->mainstack = 0;
781	}	878	}
782		879
783	stack_free (coro->stack);	880	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	881	SvREFCNT_dec (coro->args);
785	Safefree (coro);	882
		883	return 1;
786	}	884	}
787		885
788	static int	886	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	887	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	888	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	889	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	890	mg->mg_ptr = 0;
793		891
		892	if (--coro->refcnt < 0)
		893	{
794	coro_state_destroy (coro);	894	coro_state_destroy (aTHX_ coro);
		895	Safefree (coro);
		896	}
795		897
796	return 0;	898	return 0;
797	}	899	}
798		900
799	static int	901	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	902	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	903	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	904	struct coro *coro = (struct coro *)mg->mg_ptr;
803		905
804	++coro->refcnt;	906	++coro->refcnt;
805		907
806	return 0;	908	return 0;
807	}	909	}
808		910
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	911	static MGVTBL coro_state_vtbl = {
		912	0, 0, 0, 0,
		913	coro_state_free,
		914	0,
		915	#ifdef MGf_DUP
		916	coro_state_dup,
		917	#else
		918	# define MGf_DUP 0
		919	#endif
		920	};
810		921
811	static struct coro *	922	static struct coro *
812	SvSTATE (SV *coro)	923	SvSTATE_ (pTHX_ SV *coro)
813	{	924	{
814	HV *stash;	925	HV *stash;
815	MAGIC *mg;	926	MAGIC *mg;
816		927
817	if (SvROK (coro))	928	if (SvROK (coro))
…		…
823	/* very slow, but rare, check */	934	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	935	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");	936	croak ("Coro::State object required");
826	}	937	}
827		938
828	mg = SvMAGIC (coro);	939	mg = CORO_MAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;	940	return (struct coro *)mg->mg_ptr;
831	}	941	}
832		942
		943	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		944
833	static void	945	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	946	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	947	{
836	ta->prev = SvSTATE (prev);	948	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	949	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;
839	}	950	}
840		951
841	static void	952	static void
842	api_transfer (SV *prev, SV *next, int flags)	953	api_transfer (SV *prev_sv, SV *next_sv)
843	{	954	{
844	dTHX;	955	dTHX;
845	struct transfer_args ta;	956	struct transfer_args ta;
846		957
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	959	TRANSFER (ta);
849	}	960	}
850		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	dTHX;
		966	struct coro *coro = SvSTATE (coro_sv);
		967	int old_save = coro->save;
		968
		969	if (new_save >= 0)
		970	coro->save = new_save;
		971
		972	return old_save;
		973	}
		974
851	/** Coro ********************************************************************/	975	/** Coro ********************************************************************/
852		976
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	977	static void
866	coro_enq (pTHX_ SV *sv)	978	coro_enq (pTHX_ SV *coro_sv)
867	{	979	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	981	}
878		982
879	static SV *	983	static SV *
880	coro_deq (pTHX_ int min_prio)	984	coro_deq (pTHX_ int min_prio)
881	{	985	{
…		…
885	if (min_prio < 0)	989	if (min_prio < 0)
886	min_prio = 0;	990	min_prio = 0;
887		991
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	993	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	994	return av_shift (coro_ready [prio]);
893	}
894		995
895	return 0;	996	return 0;
896	}	997	}
897		998
898	static void	999	static int
899	api_ready (SV *coro)	1000	api_ready (SV *coro_sv)
900	{	1001	{
901	dTHX;	1002	dTHX;
		1003	struct coro *coro;
902		1004
903	if (SvROK (coro))	1005	if (SvROK (coro_sv))
904	coro = SvRV (coro);	1006	coro_sv = SvRV (coro_sv);
		1007
		1008	coro = SvSTATE (coro_sv);
		1009
		1010	if (coro->flags & CF_READY)
		1011	return 0;
		1012
		1013	coro->flags |= CF_READY;
905		1014
906	LOCK;	1015	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1017	++coro_nready;
908	UNLOCK;	1018	UNLOCK;
909	}
910		1019
		1020	return 1;
		1021	}
		1022
911	static void	1023	static int
		1024	api_is_ready (SV *coro_sv)
		1025	{
		1026	dTHX;
		1027	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1028	}
		1029
		1030	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	1031	prepare_schedule (pTHX_ struct transfer_args *ta)
913	{	1032	{
914	SV *current, *prev, *next;	1033	SV *prev_sv, *next_sv;
		1034
		1035	for (;;)
		1036	{
		1037	LOCK;
		1038	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1039
		1040	/* nothing to schedule: call the idle handler */
		1041	if (!next_sv)
		1042	{
		1043	dSP;
		1044	UNLOCK;
		1045
		1046	ENTER;
		1047	SAVETMPS;
		1048
		1049	PUSHMARK (SP);
		1050	PUTBACK;
		1051	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1052
		1053	FREETMPS;
		1054	LEAVE;
		1055	continue;
		1056	}
		1057
		1058	ta->next = SvSTATE (next_sv);
		1059
		1060	/* cannot transfer to destroyed coros, skip and look for next */
		1061	if (ta->next->flags & CF_DESTROYED)
		1062	{
		1063	UNLOCK;
		1064	SvREFCNT_dec (next_sv);
		1065	/* coro_nready is already taken care of by destroy */
		1066	continue;
		1067	}
		1068
		1069	--coro_nready;
		1070	UNLOCK;
		1071	break;
		1072	}
		1073
		1074	/* free this only after the transfer */
		1075	prev_sv = SvRV (coro_current);
		1076	SvRV_set (coro_current, next_sv);
		1077	ta->prev = SvSTATE (prev_sv);
		1078
		1079	assert (ta->next->flags & CF_READY);
		1080	ta->next->flags &= ~CF_READY;
915		1081
916	LOCK;	1082	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	free_coro_mortal ();	1083	free_coro_mortal (aTHX);
951	coro_mortal = prev;	1084	coro_mortal = prev_sv;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;	1085	UNLOCK;
958	}	1086	}
959		1087
960	static void	1088	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1089	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1090	{
963	LOCK;	1091	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1092	prepare_schedule (aTHX_ ta);
		1093	}
		1094
		1095	static int
		1096	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1097	{
		1098	if (coro_nready)
		1099	{
		1100	SV *prev = SvRV (coro_current);
		1101	prepare_schedule (aTHX_ ta);
		1102	api_ready (prev);
		1103	return 1;
		1104	}
		1105	else
		1106	return 0;
968	}	1107	}
969		1108
970	static void	1109	static void
971	api_schedule (void)	1110	api_schedule (void)
972	{	1111	{
973	dTHX;	1112	dTHX;
974	struct transfer_args ta;	1113	struct transfer_args ta;
975		1114
976	prepare_schedule (&ta);	1115	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1116	TRANSFER (ta);
978	}	1117	}
979		1118
980	static void	1119	static int
981	api_cede (void)	1120	api_cede (void)
982	{	1121	{
983	dTHX;	1122	dTHX;
984	struct transfer_args ta;	1123	struct transfer_args ta;
985		1124
986	prepare_cede (&ta);	1125	prepare_cede (aTHX_ &ta);
		1126
		1127	if (ta.prev != ta.next)
		1128	{
987	TRANSFER (ta);	1129	TRANSFER (ta);
		1130	return 1;
		1131	}
		1132	else
		1133	return 0;
		1134	}
		1135
		1136	static int
		1137	api_cede_notself (void)
		1138	{
		1139	dTHX;
		1140	struct transfer_args ta;
		1141
		1142	if (prepare_cede_notself (aTHX_ &ta))
		1143	{
		1144	TRANSFER (ta);
		1145	return 1;
		1146	}
		1147	else
		1148	return 0;
988	}	1149	}
989		1150
990	MODULE = Coro::State PACKAGE = Coro::State	1151	MODULE = Coro::State PACKAGE = Coro::State
991		1152
992	PROTOTYPES: DISABLE	1153	PROTOTYPES: DISABLE
…		…
998	#endif	1159	#endif
999	BOOT_PAGESIZE;	1160	BOOT_PAGESIZE;
1000		1161
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1163
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1165	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1166	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1167	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1168	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006		1169
1007	main_mainstack = PL_mainstack;	1170	main_mainstack = PL_mainstack;
1008		1171
1009	coroapi.ver = CORO_API_VERSION;	1172	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1173	coroapi.transfer = api_transfer;
…		…
1020	HV *hv;	1183	HV *hv;
1021	int i;	1184	int i;
1022		1185
1023	Newz (0, coro, 1, struct coro);	1186	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1187	coro->args = newAV ();
		1188	coro->save = CORO_SAVE_ALL;
		1189	coro->flags = CF_NEW;
1025		1190
1026	hv = newHV ();	1191	hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1192	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1194
1030	for (i = 1; i < items; i++)	1195	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1196	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1197	}
1036	OUTPUT:	1198	OUTPUT:
		1199	RETVAL
		1200
		1201	int
		1202	save (SV *coro, int new_save = -1)
		1203	CODE:
		1204	RETVAL = api_save (coro, new_save);
		1205	OUTPUT:
1037	RETVAL	1206	RETVAL
1038		1207
1039	void	1208	void
1040	_set_stacklevel (...)	1209	_set_stacklevel (...)
1041	ALIAS:	1210	ALIAS:
1042	Coro::State::transfer = 1	1211	Coro::State::transfer = 1
1043	Coro::schedule = 2	1212	Coro::schedule = 2
1044	Coro::cede = 3	1213	Coro::cede = 3
1045	Coro::Cont::yield = 4	1214	Coro::cede_notself = 4
1046	CODE:	1215	CODE:
1047	{	1216	{
1048	struct transfer_args ta;	1217	struct transfer_args ta;
1049		1218
1050	switch (ix)	1219	switch (ix)
1051	{	1220	{
1052	case 0:	1221	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1222	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1223	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1224	break;
1057		1225
1058	case 1:	1226	case 1:
1059	if (items != 3)	1227	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1228	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1229
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1230	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1231	break;
1064		1232
1065	case 2:	1233	case 2:
1066	prepare_schedule (&ta);	1234	prepare_schedule (aTHX_ &ta);
1067	break;	1235	break;
1068		1236
1069	case 3:	1237	case 3:
1070	prepare_cede (&ta);	1238	prepare_cede (aTHX_ &ta);
1071	break;	1239	break;
1072		1240
1073	case 4:	1241	case 4:
1074	{	1242	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1243	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1244
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1245	break;
1098
1099	}	1246	}
1100		1247
		1248	BARRIER;
1101	TRANSFER (ta);	1249	TRANSFER (ta);
1102	}
1103		1250
1104	void	1251	if (GIMME_V != G_VOID && ta.next != ta.prev)
1105	_clone_state_from (SV *dst, SV *src)	1252	XSRETURN_YES;
		1253	}
		1254
		1255	bool
		1256	_destroy (SV *coro_sv)
1106	CODE:	1257	CODE:
1107	{	1258	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1259	OUTPUT:
1109		1260	RETVAL
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1261
1122	void	1262	void
1123	_exit (code)	1263	_exit (code)
1124	int code	1264	int code
1125	PROTOTYPE: $	1265	PROTOTYPE: $
1126	CODE:	1266	CODE:
1127	_exit (code);	1267	_exit (code);
1128		1268
		1269	int
		1270	cctx_stacksize (int new_stacksize = 0)
		1271	CODE:
		1272	RETVAL = coro_stacksize;
		1273	if (new_stacksize)
		1274	coro_stacksize = new_stacksize;
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
		1279	cctx_count ()
		1280	CODE:
		1281	RETVAL = cctx_count;
		1282	OUTPUT:
		1283	RETVAL
		1284
		1285	int
		1286	cctx_idle ()
		1287	CODE:
		1288	RETVAL = cctx_idle;
		1289	OUTPUT:
		1290	RETVAL
		1291
1129	MODULE = Coro::State PACKAGE = Coro	1292	MODULE = Coro::State PACKAGE = Coro
1130		1293
1131	BOOT:	1294	BOOT:
1132	{	1295	{
1133	int i;	1296	int i;
…		…
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1302	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1303	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1304	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1305	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1306
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1307	coro_current = get_sv ("Coro::current", FALSE);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1308	SvREADONLY_on (coro_current);
1146		1309
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1310	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1311	coro_ready[i] = newAV ();
1149		1312
1150	{	1313	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1314	SV *sv = perl_get_sv("Coro::API", 1);
1152		1315
1153	coroapi.schedule = api_schedule;	1316	coroapi.schedule = api_schedule;
		1317	coroapi.save = api_save;
1154	coroapi.cede = api_cede;	1318	coroapi.cede = api_cede;
		1319	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1320	coroapi.ready = api_ready;
		1321	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1322	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1323	coroapi.current = coro_current;
1158		1324
1159	GCoroAPI = &coroapi;	1325	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1326	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1327	SvREADONLY_on (sv);
1162	}	1328	}
1163	}	1329	}
		1330
		1331	void
		1332	_set_current (SV *current)
		1333	PROTOTYPE: $
		1334	CODE:
		1335	SvREFCNT_dec (SvRV (coro_current));
		1336	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1337
1165	int	1338	int
1166	prio (Coro::State coro, int newprio = 0)	1339	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1340	ALIAS:
1168	nice = 1	1341	nice = 1
…		…
1171	RETVAL = coro->prio;	1344	RETVAL = coro->prio;
1172		1345
1173	if (items > 1)	1346	if (items > 1)
1174	{	1347	{
1175	if (ix)	1348	if (ix)
1176	newprio += coro->prio;	1349	newprio = coro->prio - newprio;
1177		1350
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1351	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1352	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1353
1181	coro->prio = newprio;	1354	coro->prio = newprio;
1182	}	1355	}
1183	}	1356	}
		1357	OUTPUT:
		1358	RETVAL
1184		1359
1185	void	1360	SV *
1186	ready (SV *self)	1361	ready (SV *self)
1187	PROTOTYPE: $	1362	PROTOTYPE: $
1188	CODE:	1363	CODE:
1189	api_ready (self);	1364	RETVAL = boolSV (api_ready (self));
		1365	OUTPUT:
		1366	RETVAL
		1367
		1368	SV *
		1369	is_ready (SV *self)
		1370	PROTOTYPE: $
		1371	CODE:
		1372	RETVAL = boolSV (api_is_ready (self));
		1373	OUTPUT:
		1374	RETVAL
1190		1375
1191	int	1376	int
1192	nready (...)	1377	nready (...)
1193	PROTOTYPE:	1378	PROTOTYPE:
1194	CODE:	1379	CODE:
…		…
1200		1385
1201	SV *	1386	SV *
1202	_get_state ()	1387	_get_state ()
1203	CODE:	1388	CODE:
1204	{	1389	{
1205	struct {	1390	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1391
		1392	RETVAL = newSV (sizeof (struct io_state));
		1393	data = (struct io_state *)SvPVX (RETVAL);
		1394	SvCUR_set (RETVAL, sizeof (struct io_state));
		1395	SvPOK_only (RETVAL);
		1396
1212	data.errorno = errno;	1397	data->errorno = errno;
1213	data.laststype = PL_laststype;	1398	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1399	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1400	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1401	}
1219	OUTPUT:	1402	OUTPUT:
1220	RETVAL	1403	RETVAL
1221		1404
1222	void	1405	void
1223	_set_state (char *data_)	1406	_set_state (char *data_)
1224	PROTOTYPE: $	1407	PROTOTYPE: $
1225	CODE:	1408	CODE:
1226	{	1409	{
1227	struct {	1410	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1411
1234	errno = data->errorno;	1412	errno = data->errorno;
1235	PL_laststype = data->laststype;	1413	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1414	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1415	PL_statcache = data->statcache;
1238	}	1416	}
		1417

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