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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.158 by root, Fri Sep 21 02:23:48 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
		10
		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
8		47
9	#define PERL_VERSION_ATLEAST(a,b,c) \	48	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	49	(PERL_REVISION > (a) \
11	|| (PERL_REVISION == (a) \	50	|| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	51	&& (PERL_VERSION > (b) \
…		…
31	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
33	# endif	72	# endif
34	#endif	73	#endif
35		74
36	#include <stdio.h>	75	/* 5.8.7 */
37	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
38		79
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	81	# undef CORO_STACKGUARD
41	#endif
42
43	#ifndef STACKGUARD
44	# define STACKGUARD 0
45	#endif
46
47	#ifdef HAVE_MMAP
48	# include <unistd.h>
49	# include <sys/mman.h>
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif	82	#endif
57	# include <limits.h>	83
58	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
59	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif	86	#endif
65	#endif
66		87
67	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
68	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
69	* and should be unique. */	90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
70	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
71	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
72		97
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		99
75	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
76	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
77	#else	103	#else
78	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
79	#endif	106	#endif
80		107
81	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
82		109
83	#include "CoroAPI.h"	110	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		111
87	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	116	#else
92	# define LOCK (void)0	117	# define LOCK (void)0
93	# define UNLOCK (void)0	118	# define UNLOCK (void)0
94	#endif	119	#endif
95		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
96	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
97	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
98	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
99	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
100		136
		137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
101	/* this is a structure representing a c-level coroutine */	140	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	141	typedef struct coro_cctx {
103	struct coro_stack *next;	142	struct coro_cctx *next;
104		143
105	/* the stack */	144	/* the stack */
106	void *sptr;	145	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
108		147
109	/* cpu state */	148	/* cpu state */
110	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 */
111	JMPENV *top_env;	151	JMPENV *top_env;
112	coro_context cctx;	152	coro_context cctx;
113	} 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	};
114		166
115	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
116	struct coro {	168	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	170	coro_cctx *cctx;
119		171
120	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
121	AV *args;	173	AV *args;
122	int refcnt;	174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
123		177
124	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
125	AV *defav;	179	AV *defav; /* @_ */
126	SV *defsv;	180	SV *defsv; /* $_ */
127	SV *errsv;	181	SV *errsv; /* $@ */
		182	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
128		185
129	/* saved global state not related to stacks */	186	#define VAR(name,type) type name;
130	U8 dowarn;	187	# include "state.h"
131	I32 in_eval;	188	#undef VAR
132
133	/* the stacks and related info (callchain etc..) */
134	PERL_SI *curstackinfo;
135	AV *curstack;
136	AV *mainstack;
137	SV **stack_sp;
138	OP *op;
139	SV **curpad;
140	AV *comppad;
141	CV *compcv;
142	SV **stack_base;
143	SV **stack_max;
144	SV **tmps_stack;
145	I32 tmps_floor;
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		189
163	/* coro process data */	190	/* coro process data */
164	int prio;	191	int prio;
		192
		193	/* linked list */
		194	struct coro *next, *prev;
		195	HV *hv; /* the perl hash associated with this coro, if any */
165	};	196	};
166		197
167	typedef struct coro *Coro__State;	198	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	199	typedef struct coro *Coro__State_or_hashref;
169		200
		201	/** Coro ********************************************************************/
		202
		203	#define PRIO_MAX 3
		204	#define PRIO_HIGH 1
		205	#define PRIO_NORMAL 0
		206	#define PRIO_LOW -1
		207	#define PRIO_IDLE -3
		208	#define PRIO_MIN -4
		209
		210	/* for Coro.pm */
		211	static SV *coro_current;
		212	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		213	static int coro_nready;
		214	static struct coro *coro_first;
		215
		216	/** lowlevel stuff **********************************************************/
		217
170	static AV *	218	static AV *
171	coro_clone_padlist (CV *cv)	219	coro_clone_padlist (pTHX_ CV *cv)
172	{	220	{
173	AV *padlist = CvPADLIST (cv);	221	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	222	AV *newpadlist, *newpad;
175		223
176	newpadlist = newAV ();	224	newpadlist = newAV ();
…		…
188		236
189	return newpadlist;	237	return newpadlist;
190	}	238	}
191		239
192	static void	240	static void
193	free_padlist (AV *padlist)	241	free_padlist (pTHX_ AV *padlist)
194	{	242	{
195	/* may be during global destruction */	243	/* may be during global destruction */
196	if (SvREFCNT (padlist))	244	if (SvREFCNT (padlist))
197	{	245	{
198	I32 i = AvFILLp (padlist);	246	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	267	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	268	AV *av = (AV *)mg->mg_obj;
221		269
222	/* casting is fun. */	270	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	271	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	272	free_padlist (aTHX_ padlist);
225		273
226	SvREFCNT_dec (av);	274	SvREFCNT_dec (av);
227		275
228	return 0;	276	return 0;
229	}	277	}
230		278
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	279	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		280
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		282
		283	#define CORO_MAGIC(cv) \
		284	SvMAGIC (cv) \
		285	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		286	? SvMAGIC (cv) \
		287	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		288	: 0
		289
235	/* the next two functions merely cache the padlists */	290	/* the next two functions merely cache the padlists */
236	static void	291	static void
237	get_padlist (CV *cv)	292	get_padlist (pTHX_ CV *cv)
238	{	293	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	MAGIC *mg = CORO_MAGIC (cv);
		295	AV *av;
240		296
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	297	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	298	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	299	else
244	{	300	{
245	#if 0	301	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	302	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	303	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	304	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	305	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	306	SvREFCNT_dec (cp);
251	#else	307	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	308	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	309	#endif
254	}	310	}
255	}	311	}
256		312
257	static void	313	static void
258	put_padlist (CV *cv)	314	put_padlist (pTHX_ CV *cv)
259	{	315	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	MAGIC *mg = CORO_MAGIC (cv);
		317	AV *av;
261		318
262	if (!mg)	319	if (!mg)
263	{	320	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	321	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	322	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	323	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	324	mg->mg_obj = (SV *)newAV ();
268	}	325	}
269		326
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	327	av = (AV *)mg->mg_obj;
		328
		329	if (AvFILLp (av) >= AvMAX (av))
		330	av_extend (av, AvMAX (av) + 1);
		331
		332	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
271	}	333	}
		334
		335	/** load & save, init *******************************************************/
272		336
273	#define SB do {	337	#define SB do {
274	#define SE } while (0)	338	#define SE } while (0)
275		339
276	#define LOAD(state) load_state((state));
277	#define SAVE(state,flags) save_state((state),(flags));
278
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	340	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
280		341
281	static void	342	static void
282	load_state(Coro__State c)	343	load_perl (pTHX_ Coro__State c)
283	{	344	{
284	PL_dowarn = c->dowarn;	345	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	346	# include "state.h"
286		347	#undef VAR
287	PL_curstackinfo = c->curstackinfo;
288	PL_curstack = c->curstack;
289	PL_mainstack = c->mainstack;
290	PL_stack_sp = c->stack_sp;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317		348
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	349	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	350	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	351	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		352	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		353
		354	if (c->irssv)
		355	{
		356	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		357	{
		358	SvREFCNT_dec (c->irssv);
		359	c->irssv = 0;
		360	}
		361	else
		362	{
		363	REPLACE_SV (PL_rs, c->irssv);
		364	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		365	sv_setsv (c->irssv_sv, PL_rs);
		366	}
		367	}
321		368
322	{	369	{
323	dSP;	370	dSP;
324	CV *cv;	371	CV *cv;
325		372
326	/* now do the ugly restore mess */	373	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	374	while ((cv = (CV *)POPs))
328	{	375	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	376	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	377	CvDEPTH (cv) = PTR2IV (POPs);
335	}	378	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	379	}
339		380
340	PUTBACK;	381	PUTBACK;
341	}	382	}
342	}	383	}
343		384
344	static void	385	static void
345	save_state(Coro__State c, int flags)	386	save_perl (pTHX_ Coro__State c)
346	{	387	{
347	{	388	{
348	dSP;	389	dSP;
349	I32 cxix = cxstack_ix;	390	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	391	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	394	/*
354	* the worst thing you can imagine happens first - we have to save	395	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	396	* (and reinitialize) all cv's in the whole callchain :(
356	*/	397	*/
357		398
358	PUSHs (Nullsv);	399	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	400	/* this loop was inspired by pp_caller */
360	for (;;)	401	for (;;)
361	{	402	{
362	while (cxix >= 0)	403	while (cxix >= 0)
363	{	404	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	405	PERL_CONTEXT *cx = &ccstk[cxix--];
365		406
366	if (CxTYPE(cx) == CXt_SUB)	407	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
367	{	408	{
368	CV *cv = cx->blk_sub.cv;	409	CV *cv = cx->blk_sub.cv;
		410
369	if (CvDEPTH(cv))	411	if (CvDEPTH (cv))
370	{	412	{
371	EXTEND (SP, CvDEPTH(cv)*2);	413	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	414	PUSHs ((SV *)CvPADLIST (cv));
		415	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	416	PUSHs ((SV *)cv);
382		417
		418	CvDEPTH (cv) = 0;
383	get_padlist (cv);	419	get_padlist (aTHX_ cv);
384	}	420	}
385	}	421	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	422	}
395		423
396	if (top_si->si_type == PERLSI_MAIN)	424	if (top_si->si_type == PERLSI_MAIN)
397	break;	425	break;
398		426
399	top_si = top_si->si_prev;	427	top_si = top_si->si_prev;
400	ccstk = top_si->si_cxstack;	428	ccstk = top_si->si_cxstack;
401	cxix = top_si->si_cxix;	429	cxix = top_si->si_cxix;
402	}	430	}
403		431
404	PUTBACK;	432	PUTBACK;
405	}	433	}
406		434
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	435	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	436	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	437	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		438	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		439	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
410		440
411	c->dowarn = PL_dowarn;	441	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	442	# include "state.h"
413		443	#undef VAR
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;
418	c->op = PL_op;
419	c->curpad = PL_curpad;
420	c->comppad = PL_comppad;
421	c->compcv = PL_compcv;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	444	}
445		445
446	/*	446	/*
447	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
451	*/	451	*/
		452	#if CORO_PREFER_PERL_FUNCTIONS
		453	# define coro_init_stacks init_stacks
		454	#else
452	static void	455	static void
453	coro_init_stacks ()	456	coro_init_stacks (pTHX)
454	{	457	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	458	PL_curstackinfo = new_stackinfo(64, 6);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	459	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	460	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		462
460	PL_stack_base = AvARRAY(PL_curstack);	463	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	464	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		466
464	New(50,PL_tmps_stack,96,SV*);	467	New(50,PL_tmps_stack,64,SV*);
465	PL_tmps_floor = -1;	468	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	469	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	470	PL_tmps_max = 64;
468		471
469	New(54,PL_markstack,16,I32);	472	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	473	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	474	PL_markstack_max = PL_markstack + 16;
472		475
…		…
476		479
477	New(54,PL_scopestack,16,I32);	480	New(54,PL_scopestack,16,I32);
478	PL_scopestack_ix = 0;	481	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	482	PL_scopestack_max = 16;
480		483
481	New(54,PL_savestack,96,ANY);	484	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	485	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	486	PL_savestack_max = 64;
484		487
485	#if !PERL_VERSION_ATLEAST (5,9,0)	488	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	489	New(54,PL_retstack,4,OP*);
487	PL_retstack_ix = 0;	490	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	491	PL_retstack_max = 4;
489	#endif	492	#endif
490	}	493	}
		494	#endif
491		495
492	/*	496	/*
493	* destroy the stacks, the callchain etc...	497	* destroy the stacks, the callchain etc...
494	*/	498	*/
495	static void	499	static void
496	coro_destroy_stacks()	500	coro_destroy_stacks (pTHX)
497	{	501	{
498	if (!IN_DESTRUCT)	502	if (!IN_DESTRUCT)
499	{	503	{
500	/* is this ugly, I ask? */	504	/* restore all saved variables and stuff */
501	LEAVE_SCOPE (0);	505	LEAVE_SCOPE (0);
		506	assert (PL_tmps_floor == -1);
502		507
503	/* sure it is, but more important: is it correct?? :/ */	508	/* free all temporaries */
504	FREETMPS;	509	FREETMPS;
		510	assert (PL_tmps_ix == -1);
505		511
		512	/* unwind all extra stacks */
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	513	POPSTACK_TO (PL_mainstack);
		514
		515	/* unwind main stack */
		516	dounwind (-1);
507	}	517	}
508		518
509	while (PL_curstackinfo->si_next)	519	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	520	PL_curstackinfo = PL_curstackinfo->si_next;
511		521
512	while (PL_curstackinfo)	522	while (PL_curstackinfo)
513	{	523	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	524	PERL_SI *p = PL_curstackinfo->si_prev;
515		525
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	526	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	527	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		528
528	Safefree (PL_curstackinfo->si_cxstack);	529	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	530	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	531	PL_curstackinfo = p;
531	}	532	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	538	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	539	Safefree (PL_retstack);
539	#endif	540	#endif
540	}	541	}
541		542
		543	static size_t
		544	coro_rss (struct coro *coro)
		545	{
		546	size_t rss = sizeof (coro);
		547
		548	if (coro->mainstack)
		549	{
		550	if (coro->flags & CF_RUNNING)
		551	{
		552	#define VAR(name,type)coro->name = PL_ ## name;
		553	# include "state.h"
		554	#undef VAR
		555	}
		556
		557	rss += sizeof (coro->curstackinfo);
		558	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		559	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		561	rss += coro->tmps_max * sizeof (SV *);
		562	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		563	rss += coro->scopestack_max * sizeof (I32);
		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
542	static void	576	static void
543	setup_coro (struct coro *coro)	577	setup_coro (pTHX_ struct coro *coro)
544	{	578	{
545	/*	579	/*
546	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
547	*/	581	*/
548
549	coro_init_stacks ();	582	coro_init_stacks (aTHX);
550		583
		584	PL_curcop = &PL_compiling;
		585	PL_in_eval = EVAL_NULL;
551	PL_curcop = 0;	586	PL_comppad = 0;
552	PL_in_eval = 0;
553	PL_curpm = 0;	587	PL_curpm = 0;
		588	PL_localizing = 0;
		589	PL_dirty = 0;
		590	PL_restartop = 0;
554		591
555	{	592	{
556	dSP;	593	dSP;
557	LOGOP myop;	594	LOGOP myop;
558		595
559	/* I have no idea why this is needed, but it is */
560	PUSHMARK (SP);
561
562	SvREFCNT_dec (GvAV (PL_defgv));	596	SvREFCNT_dec (GvAV (PL_defgv));
563	GvAV (PL_defgv) = coro->args; coro->args = 0;	597	GvAV (PL_defgv) = coro->args; coro->args = 0;
564		598
565	Zero (&myop, 1, LOGOP);	599	Zero (&myop, 1, LOGOP);
566	myop.op_next = Nullop;	600	myop.op_next = Nullop;
567	myop.op_flags = OPf_WANT_VOID;	601	myop.op_flags = OPf_WANT_VOID;
568		602
		603	PUSHMARK (SP);
		604	XPUSHs (av_shift (GvAV (PL_defgv)));
		605	PUTBACK;
569	PL_op = (OP *)&myop;	606	PL_op = (OP *)&myop;
570
571	PUSHMARK (SP);
572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573	PUTBACK;
574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575	SPAGAIN;	608	SPAGAIN;
576
577	ENTER; /* necessary e.g. for dounwind */
578	}	609	}
579	}
580		610
		611	ENTER; /* necessary e.g. for dounwind */
		612	}
		613
581	static void	614	static void
582	free_coro_mortal ()	615	free_coro_mortal (pTHX)
583	{	616	{
584	if (coro_mortal)	617	if (coro_mortal)
585	{	618	{
586	SvREFCNT_dec (coro_mortal);	619	SvREFCNT_dec (coro_mortal);
587	coro_mortal = 0;	620	coro_mortal = 0;
588	}	621	}
589	}	622	}
590		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 */
591	static void NOINLINE	627	static void NOINLINE
592	prepare_cctx (coro_stack *cctx)	628	prepare_cctx (pTHX_ coro_cctx *cctx)
593	{	629	{
594	dSP;	630	dSP;
595	LOGOP myop;	631	LOGOP myop;
596		632
597	Zero (&myop, 1, LOGOP);	633	Zero (&myop, 1, LOGOP);
598	myop.op_next = PL_op;	634	myop.op_next = PL_op;
599	myop.op_flags = OPf_WANT_VOID;	635	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
600
601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602		636
603	PUSHMARK (SP);	637	PUSHMARK (SP);
		638	EXTEND (SP, 2);
		639	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	640	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
605	PUTBACK;	641	PUTBACK;
		642	PL_op = (OP *)&myop;
606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607	SPAGAIN;	644	SPAGAIN;
608	}	645	}
609		646
		647	/*
		648	* this is a _very_ stripped down perl interpreter ;)
		649	*/
610	static void	650	static void
611	coro_run (void *arg)	651	coro_run (void *arg)
612	{	652	{
		653	dTHX;
		654
613	/* coro_run is the alternative epilogue of transfer() */	655	/* coro_run is the alternative tail of transfer(), so unlock here. */
614	UNLOCK;	656	UNLOCK;
615		657
		658	PL_top_env = &PL_start_env;
		659
		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
616	/*	667	/*
617	* 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
618	*/	673	*/
619	PL_top_env = &PL_start_env;	674	PL_top_env = main_top_env;
620	/* inject call to cctx_init */	675	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
621	prepare_cctx ((coro_stack *)arg);
622
623	/* somebody will hit me for both perl_run and PL_restartop */
624	perl_run (PL_curinterp);
625
626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
627	abort ();
628	}	676	}
629		677
630	static coro_stack *	678	static coro_cctx *
631	stack_new ()	679	cctx_new ()
632	{	680	{
633	coro_stack *stack;	681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
634		684
		685	++cctx_count;
		686
635	New (0, stack, 1, coro_stack);	687	Newz (0, cctx, 1, coro_cctx);
636		688
637	#if HAVE_MMAP	689	#if HAVE_MMAP
638		690
639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640	/* mmap suppsedly does allocate-on-write for us */	692	/* mmap supposedly does allocate-on-write for us */
641	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);
642		694
643	if (stack->sptr == (void *)-1)	695	if (cctx->sptr != (void *)-1)
644	{
645	perror ("FATAL: unable to mmap stack for coroutine");
646	_exit (EXIT_FAILURE);
647	}	696	{
648
649	# if STACKGUARD	697	# if CORO_STACKGUARD
650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
651	# endif	699	# endif
652		700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
653	#else	701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
654		702	cctx->mapped = 1;
655	stack->ssize = STACKSIZE * (long)sizeof (long);
656	New (0, stack->sptr, STACKSIZE, long);
657
658	if (!stack->sptr)
659	{	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	{
660	perror (stderr, "FATAL: unable to malloc stack for coroutine");	712	perror ("FATAL: unable to allocate stack for coroutine");
661	_exit (EXIT_FAILURE);	713	_exit (EXIT_FAILURE);
662	}	714	}
663		715
664	#endif	716	stack_start = cctx->sptr;
		717	stack_size = cctx->ssize;
		718	}
665		719
		720	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
667		722
668	return stack;	723	return cctx;
669	}	724	}
670		725
671	static void	726	static void
672	stack_free (coro_stack *stack)	727	cctx_destroy (coro_cctx *cctx)
673	{	728	{
674	if (!stack)	729	if (!cctx)
675	return;	730	return;
676		731
		732	--cctx_count;
		733
		734	#if CORO_USE_VALGRIND
		735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		736	#endif
		737
677	#if HAVE_MMAP	738	#if HAVE_MMAP
		739	if (cctx->mapped)
678	munmap (stack->sptr, stack->ssize);	740	munmap (cctx->sptr, cctx->ssize);
679	#else	741	else
		742	#endif
680	Safefree (stack->sptr);	743	Safefree (cctx->sptr);
681	#endif
682		744
683	Safefree (stack);	745	Safefree (cctx);
684	}	746	}
685		747
686	static coro_stack *stack_first;
687	static int cctx_count, cctx_idle;
688
689	static coro_stack *	748	static coro_cctx *
690	stack_get ()	749	cctx_get (pTHX)
691	{	750	{
692	coro_stack *stack;	751	while (cctx_first)
693
694	if (stack_first)
695	{	752	{
		753	coro_cctx *cctx = cctx_first;
		754	cctx_first = cctx->next;
696	--cctx_idle;	755	--cctx_idle;
697	stack = stack_first;	756
698	stack_first = stack->next;	757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
699	}	761	}
700	else	762
701	{
702	++cctx_count;
703	stack = stack_new ();
704	PL_op = PL_op->op_next;	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);
705	}	779	}
706		780
707	return stack;
708	}
709
710	static void
711	stack_put (coro_stack *stack)
712	{
713	++cctx_idle;	781	++cctx_idle;
714	stack->next = stack_first;	782	cctx->next = cctx_first;
715	stack_first = stack;	783	cctx_first = cctx;
716	}	784	}
		785
		786	/** coroutine switching *****************************************************/
717		787
718	/* never call directly, always through the coro_state_transfer global variable */	788	/* never call directly, always through the coro_state_transfer global variable */
719	static void NOINLINE	789	static void NOINLINE
720	transfer (struct coro *prev, struct coro *next, int flags)	790	transfer (pTHX_ struct coro *prev, struct coro *next)
721	{	791	{
722	dSTACKLEVEL;	792	dSTACKLEVEL;
723		793
724	/* sometimes transfer is only called to set idle_sp */	794	/* sometimes transfer is only called to set idle_sp */
725	if (flags == TRANSFER_SET_STACKLEVEL)	795	if (!next)
		796	{
726	((coro_stack *)prev)->idle_sp = STACKLEVEL;	797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		798	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		799	}
727	else if (prev != next)	800	else if (prev != next)
728	{	801	{
729	coro_stack *prev__stack;	802	coro_cctx *prev__cctx;
		803
		804	if (prev->flags & CF_NEW)
		805	{
		806	/* create a new empty context */
		807	Newz (0, prev->cctx, 1, coro_cctx);
		808	prev->cctx->inuse = 1;
		809	prev->flags &= ~CF_NEW;
		810	prev->flags |= CF_RUNNING;
		811	}
		812
		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;
730		825
731	LOCK;	826	LOCK;
732		827
733	if (next->mainstack)	828	if (next->flags & CF_NEW)
734	{	829	{
735	/* coroutine already started */	830	/* need to start coroutine */
736	SAVE (prev, flags);	831	next->flags &= ~CF_NEW;
737	LOAD (next);	832	/* first get rid of the old state */
		833	save_perl (aTHX_ prev);
		834	/* setup coroutine call */
		835	setup_coro (aTHX_ next);
		836	/* need a new stack */
		837	assert (!next->cctx);
738	}	838	}
739	else	839	else
740	{	840	{
741	/* need to start coroutine */	841	/* coroutine already started */
742	/* first get rid of the old state */	842	save_perl (aTHX_ prev);
743	SAVE (prev, -1);	843	load_perl (aTHX_ next);
744	/* setup coroutine call */
745	setup_coro (next);
746	/* need a stack */
747	next->stack = 0;
748	}	844	}
749		845
750	if (!prev->stack)
751	/* create a new empty context */
752	Newz (0, prev->stack, 1, coro_stack);
753
754	prev__stack = prev->stack;	846	prev__cctx = prev->cctx;
755		847
756	/* possibly "free" the stack */	848	/* possibly "free" the cctx */
757	if (prev__stack->idle_sp == STACKLEVEL)	849	if (prev__cctx->idle_sp == STACKLEVEL)
758	{	850	{
759	stack_put (prev__stack);	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
760	prev->stack = 0;	854	prev->cctx = 0;
		855
		856	cctx_put (prev__cctx);
		857	prev__cctx->inuse = 0;
761	}	858	}
762		859
763	if (!next->stack)	860	if (!next->cctx)
764	next->stack = stack_get ();
765
766	if (prev__stack != next->stack)
767	{	861	{
768	prev__stack->top_env = PL_top_env;	862	next->cctx = cctx_get (aTHX);
769	PL_top_env = next->stack->top_env;	863	assert (!next->cctx->inuse);
770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	864	next->cctx->inuse = 1;
771	}	865	}
772		866
		867	if (prev__cctx != next->cctx)
		868	{
		869	prev__cctx->top_env = PL_top_env;
		870	PL_top_env = next->cctx->top_env;
		871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		872	}
		873
773	free_coro_mortal ();	874	free_coro_mortal (aTHX);
774
775	UNLOCK;	875	UNLOCK;
776	}	876	}
777	}	877	}
778		878
779	struct transfer_args	879	struct transfer_args
780	{	880	{
781	struct coro *prev, *next;	881	struct coro *prev, *next;
782	int flags;
783	};	882	};
784		883
785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
786		885
		886	/** high level stuff ********************************************************/
		887
787	static void	888	static int
788	coro_state_destroy (struct coro *coro)	889	coro_state_destroy (pTHX_ struct coro *coro)
789	{	890	{
790	if (coro->refcnt--)	891	if (coro->flags & CF_DESTROYED)
791	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 */
792		906
793	if (coro->mainstack && coro->mainstack != main_mainstack)	907	if (coro->mainstack && coro->mainstack != main_mainstack)
794	{	908	{
795	struct coro temp;	909	struct coro temp;
796		910
797	SAVE ((&temp), TRANSFER_SAVE_ALL);	911	assert (!(coro->flags & CF_RUNNING));
798	LOAD (coro);
799		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);
		920	load_perl (aTHX_ coro);
		921
800	coro_destroy_stacks ();	922	coro_destroy_stacks (aTHX);
801		923
802	LOAD ((&temp)); /* this will get rid of defsv etc.. */	924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
803		925
804	coro->mainstack = 0;	926	coro->mainstack = 0;
805	}	927	}
806		928
807	stack_free (coro->stack);	929	cctx_destroy (coro->cctx);
808	SvREFCNT_dec (coro->args);	930	SvREFCNT_dec (coro->args);
809	Safefree (coro);	931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == coro_first) coro_first = coro->next;
		935
		936	return 1;
810	}	937	}
811		938
812	static int	939	static int
813	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	940	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814	{	941	{
815	struct coro *coro = (struct coro *)mg->mg_ptr;	942	struct coro *coro = (struct coro *)mg->mg_ptr;
816	mg->mg_ptr = 0;	943	mg->mg_ptr = 0;
817		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
818	coro_state_destroy (coro);	949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
819		952
820	return 0;	953	return 0;
821	}	954	}
822		955
823	static int	956	static int
…		…
830	return 0;	963	return 0;
831	}	964	}
832		965
833	static MGVTBL coro_state_vtbl = {	966	static MGVTBL coro_state_vtbl = {
834	0, 0, 0, 0,	967	0, 0, 0, 0,
835	coro_state_clear,	968	coro_state_free,
836	0,	969	0,
837	#ifdef MGf_DUP	970	#ifdef MGf_DUP
838	coro_state_dup,	971	coro_state_dup,
839	#else	972	#else
840	# define MGf_DUP 0	973	# define MGf_DUP 0
841	#endif	974	#endif
842	};	975	};
843		976
844	static struct coro *	977	static struct coro *
845	SvSTATE (SV *coro)	978	SvSTATE_ (pTHX_ SV *coro)
846	{	979	{
847	HV *stash;	980	HV *stash;
848	MAGIC *mg;	981	MAGIC *mg;
849		982
850	if (SvROK (coro))	983	if (SvROK (coro))
…		…
856	/* very slow, but rare, check */	989	/* very slow, but rare, check */
857	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
858	croak ("Coro::State object required");	991	croak ("Coro::State object required");
859	}	992	}
860		993
861	mg = SvMAGIC (coro);	994	mg = CORO_MAGIC (coro);
862	assert (mg->mg_type == PERL_MAGIC_ext);
863	return (struct coro *)mg->mg_ptr;	995	return (struct coro *)mg->mg_ptr;
864	}	996	}
865		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
866	static void	1000	static void
867	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1001	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
868	{	1002	{
869	ta->prev = SvSTATE (prev);	1003	ta->prev = SvSTATE (prev_sv);
870	ta->next = SvSTATE (next);	1004	ta->next = SvSTATE (next_sv);
871	ta->flags = flags;
872	}	1005	}
873		1006
874	static void	1007	static void
875	api_transfer (SV *prev, SV *next, int flags)	1008	api_transfer (SV *prev_sv, SV *next_sv)
876	{	1009	{
877	dTHX;	1010	dTHX;
878	struct transfer_args ta;	1011	struct transfer_args ta;
879		1012
880	prepare_transfer (&ta, prev, next, flags);	1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	1014	TRANSFER (ta);
882	}	1015	}
883		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;
		1028	}
		1029
884	/** Coro ********************************************************************/	1030	/** Coro ********************************************************************/
885		1031
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static GV *coro_current, *coro_idle;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	1032	static void
899	coro_enq (SV *sv)	1033	coro_enq (pTHX_ SV *coro_sv)
900	{	1034	{
901	int prio;
902
903	if (SvTYPE (sv) != SVt_PVHV)
904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
905
906	prio = SvSTATE (sv)->prio;
907
908	av_push (coro_ready [prio - PRIO_MIN], sv);	1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
909	coro_nready++;
910	}	1036	}
911		1037
912	static SV *	1038	static SV *
913	coro_deq (int min_prio)	1039	coro_deq (pTHX_ int min_prio)
914	{	1040	{
915	int prio = PRIO_MAX - PRIO_MIN;	1041	int prio = PRIO_MAX - PRIO_MIN;
916		1042
917	min_prio -= PRIO_MIN;	1043	min_prio -= PRIO_MIN;
918	if (min_prio < 0)	1044	if (min_prio < 0)
919	min_prio = 0;	1045	min_prio = 0;
920		1046
921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
922	if (AvFILLp (coro_ready [prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
923	{
924	coro_nready--;
925	return av_shift (coro_ready [prio]);	1049	return av_shift (coro_ready [prio]);
926	}
927		1050
928	return 0;	1051	return 0;
929	}	1052	}
930		1053
931	static void	1054	static int
932	api_ready (SV *coro)	1055	api_ready (SV *coro_sv)
933	{	1056	{
934	dTHX;	1057	dTHX;
		1058	struct coro *coro;
935		1059
936	if (SvROK (coro))	1060	if (SvROK (coro_sv))
937	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;
938		1069
939	LOCK;	1070	LOCK;
940	coro_enq (SvREFCNT_inc (coro));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1072	++coro_nready;
941	UNLOCK;	1073	UNLOCK;
942	}
943		1074
		1075	return 1;
		1076	}
		1077
944	static void	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
945	prepare_schedule (struct transfer_args *ta)	1086	prepare_schedule (pTHX_ struct transfer_args *ta)
946	{	1087	{
947	SV *current, *prev, *next;	1088	SV *prev_sv, *next_sv;
948
949	current = GvSV (coro_current);
950		1089
951	for (;;)	1090	for (;;)
952	{	1091	{
953	LOCK;	1092	LOCK;
954	next = coro_deq (PRIO_MIN);	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;
955	UNLOCK;	1125	UNLOCK;
956
957	if (next)
958	break;	1126	break;
959
960	{
961	dSP;
962
963	ENTER;
964	SAVETMPS;
965
966	PUSHMARK (SP);
967	PUTBACK;
968	call_sv (GvSV (coro_idle), G_DISCARD);
969
970	FREETMPS;
971	LEAVE;
972	}	1127	}
973	}
974
975	prev = SvRV (current);
976	SvRV (current) = next;
977		1128
978	/* free this only after the transfer */	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
979	LOCK;	1137	LOCK;
980	free_coro_mortal ();	1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
981	UNLOCK;	1140	UNLOCK;
982	coro_mortal = prev;
983
984	ta->prev = SvSTATE (prev);
985	ta->next = SvSTATE (next);
986	ta->flags = TRANSFER_SAVE_ALL;
987	}	1141	}
988		1142
989	static void	1143	static void
990	prepare_cede (struct transfer_args *ta)	1144	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1145	{
992	LOCK;	1146	api_ready (coro_current);
993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994	UNLOCK;
995
996	prepare_schedule (ta);	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;
997	}	1162	}
998		1163
999	static void	1164	static void
1000	api_schedule (void)	1165	api_schedule (void)
1001	{	1166	{
1002	dTHX;	1167	dTHX;
1003	struct transfer_args ta;	1168	struct transfer_args ta;
1004		1169
1005	prepare_schedule (&ta);	1170	prepare_schedule (aTHX_ &ta);
1006	TRANSFER (ta);	1171	TRANSFER (ta);
1007	}	1172	}
1008		1173
1009	static void	1174	static int
1010	api_cede (void)	1175	api_cede (void)
1011	{	1176	{
1012	dTHX;	1177	dTHX;
1013	struct transfer_args ta;	1178	struct transfer_args ta;
1014		1179
1015	prepare_cede (&ta);	1180	prepare_cede (aTHX_ &ta);
		1181
		1182	if (ta.prev != ta.next)
		1183	{
1016	TRANSFER (ta);	1184	TRANSFER (ta);
		1185	return 1;
		1186	}
		1187	else
		1188	return 0;
		1189	}
		1190
		1191	static int
		1192	api_cede_notself (void)
		1193	{
		1194	dTHX;
		1195	struct transfer_args ta;
		1196
		1197	if (prepare_cede_notself (aTHX_ &ta))
		1198	{
		1199	TRANSFER (ta);
		1200	return 1;
		1201	}
		1202	else
		1203	return 0;
1017	}	1204	}
1018		1205
1019	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
1020		1207
1021	PROTOTYPES: DISABLE	1208	PROTOTYPES: DISABLE
…		…
1027	#endif	1214	#endif
1028	BOOT_PAGESIZE;	1215	BOOT_PAGESIZE;
1029		1216
1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031		1218
1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1034	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));
1035		1226
1036	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;
1037		1232
1038	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
1039	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
1040		1235
1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1049	HV *hv;	1244	HV *hv;
1050	int i;	1245	int i;
1051		1246
1052	Newz (0, coro, 1, struct coro);	1247	Newz (0, coro, 1, struct coro);
1053	coro->args = newAV ();	1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
		1250	coro->flags = CF_NEW;
1054		1251
		1252	if (coro_first) coro_first->prev = coro;
		1253	coro->next = coro_first;
		1254	coro_first = coro;
		1255
1055	hv = newHV ();	1256	coro->hv = hv = newHV ();
1056	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;
1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058		1259
1059	for (i = 1; i < items; i++)	1260	for (i = 1; i < items; i++)
1060	av_push (coro->args, newSVsv (ST (i)));	1261	av_push (coro->args, newSVsv (ST (i)));
1061
1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1063	/*coro->stack = 0;*/
1064	}	1262	}
1065	OUTPUT:	1263	OUTPUT:
		1264	RETVAL
		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:
1066	RETVAL	1282	RETVAL
1067		1283
1068	void	1284	void
1069	_set_stacklevel (...)	1285	_set_stacklevel (...)
1070	ALIAS:	1286	ALIAS:
1071	Coro::State::transfer = 1	1287	Coro::State::transfer = 1
1072	Coro::schedule = 2	1288	Coro::schedule = 2
1073	Coro::cede = 3	1289	Coro::cede = 3
1074	Coro::Cont::yield = 4	1290	Coro::cede_notself = 4
1075	CODE:	1291	CODE:
1076	{	1292	{
1077	struct transfer_args ta;	1293	struct transfer_args ta;
1078		1294
1079	switch (ix)	1295	switch (ix)
1080	{	1296	{
1081	case 0:	1297	case 0:
1082	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1083	ta.next = 0;	1299	ta.next = 0;
1084	ta.flags = TRANSFER_SET_STACKLEVEL;
1085	break;	1300	break;
1086		1301
1087	case 1:	1302	case 1:
1088	if (items != 3)	1303	if (items != 2)
1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1304	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1090		1305
1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1092	break;	1307	break;
1093		1308
1094	case 2:	1309	case 2:
1095	prepare_schedule (&ta);	1310	prepare_schedule (aTHX_ &ta);
1096	break;	1311	break;
1097		1312
1098	case 3:	1313	case 3:
1099	prepare_cede (&ta);	1314	prepare_cede (aTHX_ &ta);
1100	break;	1315	break;
1101		1316
1102	case 4:	1317	case 4:
1103	{	1318	if (!prepare_cede_notself (aTHX_ &ta))
1104	SV *yieldstack;	1319	XSRETURN_EMPTY;
1105	SV *sv;
1106	AV *defav = GvAV (PL_defgv);
1107		1320
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123	ta.flags = 0;
1124	SvREFCNT_dec (sv);
1125	}
1126	break;	1321	break;
1127
1128	}	1322	}
1129		1323
		1324	BARRIER;
1130	TRANSFER (ta);	1325	TRANSFER (ta);
1131	}
1132		1326
1133	void	1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
1134	_clone_state_from (SV *dst, SV *src)	1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
1135	CODE:	1333	CODE:
1136	{	1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1137	struct coro *coro_src = SvSTATE (src);	1335	OUTPUT:
1138		1336	RETVAL
1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1140
1141	++coro_src->refcnt;
1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1143	}
1144		1337
1145	void	1338	void
1146	_exit (code)	1339	_exit (code)
1147	int code	1340	int code
1148	PROTOTYPE: $	1341	PROTOTYPE: $
1149	CODE:	1342	CODE:
1150	_exit (code);	1343	_exit (code);
1151		1344
		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
		1367
		1368	void
		1369	list ()
		1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = 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: $
		1431	CODE:
		1432	RETVAL = coro_rss (coro);
		1433	OUTPUT:
		1434	RETVAL
		1435
		1436
1152	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1153		1438
1154	BOOT:	1439	BOOT:
1155	{	1440	{
1156	int i;	1441	int i;
…		…
1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1166		1451
1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1169		1454
1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1172		1457
1173	{	1458	{
1174	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1175		1460
1176	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
1177	coroapi.cede = api_cede;	1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1178	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
		1466	coroapi.is_ready = api_is_ready;
1179	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1180	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1181		1469
1182	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1183	sv_setiv (sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1184	SvREADONLY_on (sv);	1472	SvREADONLY_on (sv);
1185	}	1473	}
1186	}	1474	}
		1475
		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)));
1187		1482
1188	int	1483	int
1189	prio (Coro::State coro, int newprio = 0)	1484	prio (Coro::State coro, int newprio = 0)
1190	ALIAS:	1485	ALIAS:
1191	nice = 1	1486	nice = 1
…		…
1194	RETVAL = coro->prio;	1489	RETVAL = coro->prio;
1195		1490
1196	if (items > 1)	1491	if (items > 1)
1197	{	1492	{
1198	if (ix)	1493	if (ix)
1199	newprio += coro->prio;	1494	newprio = coro->prio - newprio;
1200		1495
1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1203		1498
1204	coro->prio = newprio;	1499	coro->prio = newprio;
1205	}	1500	}
1206	}	1501	}
		1502	OUTPUT:
		1503	RETVAL
1207		1504
1208	void	1505	SV *
1209	ready (SV *self)	1506	ready (SV *self)
1210	PROTOTYPE: $	1507	PROTOTYPE: $
1211	CODE:	1508	CODE:
1212	api_ready (self);	1509	RETVAL = boolSV (api_ready (self));
		1510	OUTPUT:
		1511	RETVAL
1213		1512
1214	int	1513	int
1215	nready (...)	1514	nready (...)
1216	PROTOTYPE:	1515	PROTOTYPE:
1217	CODE:	1516	CODE:
…		…
1223		1522
1224	SV *	1523	SV *
1225	_get_state ()	1524	_get_state ()
1226	CODE:	1525	CODE:
1227	{	1526	{
1228	struct {	1527	struct io_state *data;
1229	int errorno;
1230	int laststype;
1231	int laststatval;
1232	Stat_t statcache;
1233	} data;
1234		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
1235	data.errorno = errno;	1534	data->errorno = errno;
1236	data.laststype = PL_laststype;	1535	data->laststype = PL_laststype;
1237	data.laststatval = PL_laststatval;	1536	data->laststatval = PL_laststatval;
1238	data.statcache = PL_statcache;	1537	data->statcache = PL_statcache;
1239
1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
1241	}	1538	}
1242	OUTPUT:	1539	OUTPUT:
1243	RETVAL	1540	RETVAL
1244		1541
1245	void	1542	void
1246	_set_state (char *data_)	1543	_set_state (char *data_)
1247	PROTOTYPE: $	1544	PROTOTYPE: $
1248	CODE:	1545	CODE:
1249	{	1546	{
1250	struct {	1547	struct io_state *data = (void *)data_;
1251	int errorno;
1252	int laststype;
1253	int laststatval;
1254	Stat_t statcache;
1255	} *data = (void *)data_;
1256		1548
1257	errno = data->errorno;	1549	errno = data->errorno;
1258	PL_laststype = data->laststype;	1550	PL_laststype = data->laststype;
1259	PL_laststatval = data->laststatval;	1551	PL_laststatval = data->laststatval;
1260	PL_statcache = data->statcache;	1552	PL_statcache = data->statcache;
1261	}	1553	}
		1554

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