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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.102 by root, Mon Nov 27 01:28:03 2006 UTC vs.
Revision 1.164 by root, Tue Sep 25 01:47:23 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	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
101	/* this is a structure representing a c-level coroutine */	145	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	146	typedef struct coro_cctx {
103	struct coro_stack *next;	147	struct coro_cctx *next;
104		148
105	/* the stack */	149	/* the stack */
106	void *sptr;	150	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	151	size_t ssize;
108		152
109	/* cpu state */	153	/* cpu state */
110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	154	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		155	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111	JMPENV *top_env;	156	JMPENV *top_env;
112	coro_context cctx;	157	coro_context cctx;
113	} coro_stack;	158
		159	#if CORO_USE_VALGRIND
		160	int valgrind_id;
		161	#endif
		162	char inuse, mapped;
		163	} coro_cctx;
		164
		165	enum {
		166	CF_RUNNING = 0x0001, /* coroutine is running */
		167	CF_READY = 0x0002, /* coroutine is ready */
		168	CF_NEW = 0x0004, /* has never been switched to */
		169	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		170	};
114		171
115	/* this is a structure representing a perl-level coroutine */	172	/* this is a structure representing a perl-level coroutine */
116	struct coro {	173	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	174	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	175	coro_cctx *cctx;
119		176
120	/* data associated with this coroutine (initial args) */	177	/* data associated with this coroutine (initial args) */
121	AV *args;	178	AV *args;
122	int refcnt;	179	int refcnt;
		180	int save; /* CORO_SAVE flags */
		181	int flags; /* CF_ flags */
123		182
124	/* optionally saved, might be zero */	183	/* optionally saved, might be zero */
125	AV *defav;	184	AV *defav; /* @_ */
126	SV *defsv;	185	SV *defsv; /* $_ */
127	SV *errsv;	186	SV *errsv; /* $@ */
		187	GV *deffh; /* default filehandle */
		188	SV *irssv; /* $/ */
		189	SV *irssv_sv; /* real $/ cache */
128		190
129	/* saved global state not related to stacks */	191	#define VAR(name,type) type name;
130	U8 dowarn;	192	# include "state.h"
131	I32 in_eval;	193	#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		194
163	/* coro process data */	195	/* coro process data */
164	int prio;	196	int prio;
		197
		198	/* linked list */
		199	struct coro *next, *prev;
		200	HV *hv; /* the perl hash associated with this coro, if any */
165	};	201	};
166		202
167	typedef struct coro *Coro__State;	203	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	204	typedef struct coro *Coro__State_or_hashref;
169		205
		206	/** Coro ********************************************************************/
		207
		208	#define PRIO_MAX 3
		209	#define PRIO_HIGH 1
		210	#define PRIO_NORMAL 0
		211	#define PRIO_LOW -1
		212	#define PRIO_IDLE -3
		213	#define PRIO_MIN -4
		214
		215	/* for Coro.pm */
		216	static SV *coro_current;
		217	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		218	static int coro_nready;
		219	static struct coro *coro_first;
		220
		221	/** lowlevel stuff **********************************************************/
		222
170	static AV *	223	static AV *
171	coro_clone_padlist (CV *cv)	224	coro_clone_padlist (pTHX_ CV *cv)
172	{	225	{
173	AV *padlist = CvPADLIST (cv);	226	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	227	AV *newpadlist, *newpad;
175		228
176	newpadlist = newAV ();	229	newpadlist = newAV ();
…		…
188		241
189	return newpadlist;	242	return newpadlist;
190	}	243	}
191		244
192	static void	245	static void
193	free_padlist (AV *padlist)	246	free_padlist (pTHX_ AV *padlist)
194	{	247	{
195	/* may be during global destruction */	248	/* may be during global destruction */
196	if (SvREFCNT (padlist))	249	if (SvREFCNT (padlist))
197	{	250	{
198	I32 i = AvFILLp (padlist);	251	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	272	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	273	AV *av = (AV *)mg->mg_obj;
221		274
222	/* casting is fun. */	275	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	277	free_padlist (aTHX_ padlist);
225		278
226	SvREFCNT_dec (av);	279	SvREFCNT_dec (av);
227		280
228	return 0;	281	return 0;
229	}	282	}
230		283
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	284	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		285
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	286	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		287
		288	#define CORO_MAGIC(cv) \
		289	SvMAGIC (cv) \
		290	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		291	? SvMAGIC (cv) \
		292	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		293	: 0
		294
235	/* the next two functions merely cache the padlists */	295	/* the next two functions merely cache the padlists */
236	static void	296	static void
237	get_padlist (CV *cv)	297	get_padlist (pTHX_ CV *cv)
238	{	298	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	299	MAGIC *mg = CORO_MAGIC (cv);
		300	AV *av;
240		301
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	302	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	303	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	304	else
244	{	305	{
245	#if 0	306	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	307	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	308	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	309	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	310	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	311	SvREFCNT_dec (cp);
251	#else	312	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	313	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	314	#endif
254	}	315	}
255	}	316	}
256		317
257	static void	318	static void
258	put_padlist (CV *cv)	319	put_padlist (pTHX_ CV *cv)
259	{	320	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	321	MAGIC *mg = CORO_MAGIC (cv);
		322	AV *av;
261		323
262	if (!mg)	324	if (!mg)
263	{	325	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	326	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	327	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	328	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	329	mg->mg_obj = (SV *)newAV ();
268	}	330	}
269		331
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	332	av = (AV *)mg->mg_obj;
		333
		334	if (AvFILLp (av) >= AvMAX (av))
		335	av_extend (av, AvMAX (av) + 1);
		336
		337	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
271	}	338	}
		339
		340	/** load & save, init *******************************************************/
272		341
273	#define SB do {	342	#define SB do {
274	#define SE } while (0)	343	#define SE } while (0)
275		344
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	345	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
280		346
281	static void	347	static void
282	load_state(Coro__State c)	348	load_perl (pTHX_ Coro__State c)
283	{	349	{
284	PL_dowarn = c->dowarn;	350	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	351	# include "state.h"
286		352	#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		353
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	354	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	355	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	356	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		357	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		358
		359	if (c->irssv)
		360	{
		361	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		362	{
		363	SvREFCNT_dec (c->irssv);
		364	c->irssv = 0;
		365	}
		366	else
		367	{
		368	REPLACE_SV (PL_rs, c->irssv);
		369	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		370	sv_setsv (c->irssv_sv, PL_rs);
		371	}
		372	}
321		373
322	{	374	{
323	dSP;	375	dSP;
324	CV *cv;	376	CV *cv;
325		377
326	/* now do the ugly restore mess */	378	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	379	while ((cv = (CV *)POPs))
328	{	380	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	381	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	382	CvDEPTH (cv) = PTR2IV (POPs);
335	}	383	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	384	}
339		385
340	PUTBACK;	386	PUTBACK;
341	}	387	}
342	}	388	}
343		389
344	static void	390	static void
345	save_state(Coro__State c, int flags)	391	save_perl (pTHX_ Coro__State c)
346	{	392	{
347	{	393	{
348	dSP;	394	dSP;
349	I32 cxix = cxstack_ix;	395	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	396	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	399	/*
354	* the worst thing you can imagine happens first - we have to save	400	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	401	* (and reinitialize) all cv's in the whole callchain :(
356	*/	402	*/
357		403
358	PUSHs (Nullsv);	404	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	405	/* this loop was inspired by pp_caller */
360	for (;;)	406	for (;;)
361	{	407	{
362	while (cxix >= 0)	408	while (cxix >= 0)
363	{	409	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	410	PERL_CONTEXT *cx = &ccstk[cxix--];
365		411
366	if (CxTYPE(cx) == CXt_SUB)	412	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
367	{	413	{
368	CV *cv = cx->blk_sub.cv;	414	CV *cv = cx->blk_sub.cv;
		415
369	if (CvDEPTH(cv))	416	if (CvDEPTH (cv))
370	{	417	{
371	EXTEND (SP, CvDEPTH(cv)*2);	418	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));	419	PUSHs ((SV *)CvPADLIST (cv));
		420	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	421	PUSHs ((SV *)cv);
382		422
		423	CvDEPTH (cv) = 0;
383	get_padlist (cv);	424	get_padlist (aTHX_ cv);
384	}	425	}
385	}	426	}
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	}	427	}
395		428
396	if (top_si->si_type == PERLSI_MAIN)	429	if (top_si->si_type == PERLSI_MAIN)
397	break;	430	break;
398		431
399	top_si = top_si->si_prev;	432	top_si = top_si->si_prev;
400	ccstk = top_si->si_cxstack;	433	ccstk = top_si->si_cxstack;
401	cxix = top_si->si_cxix;	434	cxix = top_si->si_cxix;
402	}	435	}
403		436
404	PUTBACK;	437	PUTBACK;
405	}	438	}
406		439
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	440	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;	441	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	442	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		443	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		444	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
410		445
411	c->dowarn = PL_dowarn;	446	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	447	# include "state.h"
413		448	#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	}	449	}
445		450
446	/*	451	/*
447	* allocate various perl stacks. This is an exact copy	452	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	453	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	454	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	455	* not usually need a lot of stackspace.
451	*/	456	*/
		457	#if CORO_PREFER_PERL_FUNCTIONS
		458	# define coro_init_stacks init_stacks
		459	#else
452	static void	460	static void
453	coro_init_stacks ()	461	coro_init_stacks (pTHX)
454	{	462	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	463	PL_curstackinfo = new_stackinfo(64, 6);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		467
460	PL_stack_base = AvARRAY(PL_curstack);	468	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	469	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		471
464	New(50,PL_tmps_stack,96,SV*);	472	New(50,PL_tmps_stack,64,SV*);
465	PL_tmps_floor = -1;	473	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	474	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	475	PL_tmps_max = 64;
468		476
469	New(54,PL_markstack,16,I32);	477	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	478	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	479	PL_markstack_max = PL_markstack + 16;
472		480
…		…
476		484
477	New(54,PL_scopestack,16,I32);	485	New(54,PL_scopestack,16,I32);
478	PL_scopestack_ix = 0;	486	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	487	PL_scopestack_max = 16;
480		488
481	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	491	PL_savestack_max = 64;
484		492
485	#if !PERL_VERSION_ATLEAST (5,9,0)	493	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,4,OP*);
487	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	496	PL_retstack_max = 4;
489	#endif	497	#endif
490	}	498	}
		499	#endif
491		500
492	/*	501	/*
493	* destroy the stacks, the callchain etc...	502	* destroy the stacks, the callchain etc...
494	*/	503	*/
495	static void	504	static void
496	coro_destroy_stacks()	505	coro_destroy_stacks (pTHX)
497	{	506	{
498	if (!IN_DESTRUCT)	507	if (!IN_DESTRUCT)
499	{	508	{
500	/* is this ugly, I ask? */	509	/* restore all saved variables and stuff */
501	LEAVE_SCOPE (0);	510	LEAVE_SCOPE (0);
		511	assert (PL_tmps_floor == -1);
502		512
503	/* sure it is, but more important: is it correct?? :/ */	513	/* free all temporaries */
504	FREETMPS;	514	FREETMPS;
		515	assert (PL_tmps_ix == -1);
505		516
		517	/* unwind all extra stacks */
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	518	POPSTACK_TO (PL_mainstack);
		519
		520	/* unwind main stack */
		521	dounwind (-1);
507	}	522	}
508		523
509	while (PL_curstackinfo->si_next)	524	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	525	PL_curstackinfo = PL_curstackinfo->si_next;
511		526
512	while (PL_curstackinfo)	527	while (PL_curstackinfo)
513	{	528	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	529	PERL_SI *p = PL_curstackinfo->si_prev;
515		530
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	531	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	532	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		533
528	Safefree (PL_curstackinfo->si_cxstack);	534	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	535	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	536	PL_curstackinfo = p;
531	}	537	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	543	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	544	Safefree (PL_retstack);
539	#endif	545	#endif
540	}	546	}
541		547
		548	static size_t
		549	coro_rss (struct coro *coro)
		550	{
		551	size_t rss = sizeof (coro);
		552
		553	if (coro->mainstack)
		554	{
		555	if (coro->flags & CF_RUNNING)
		556	{
		557	#define VAR(name,type)coro->name = PL_ ## name;
		558	# include "state.h"
		559	#undef VAR
		560	}
		561
		562	rss += sizeof (coro->curstackinfo);
		563	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		564	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		565	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		566	rss += coro->tmps_max * sizeof (SV *);
		567	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		568	rss += coro->scopestack_max * sizeof (I32);
		569	rss += coro->savestack_max * sizeof (ANY);
		570
		571	#if !PERL_VERSION_ATLEAST (5,9,0)
		572	rss += coro->retstack_max * sizeof (OP *);
		573	#endif
		574	}
		575
		576	return rss;
		577	}
		578
		579	/** coroutine stack handling ************************************************/
		580
542	static void	581	static void
543	setup_coro (struct coro *coro)	582	setup_coro (pTHX_ struct coro *coro)
544	{	583	{
545	/*	584	/*
546	* emulate part of the perl startup here.	585	* emulate part of the perl startup here.
547	*/	586	*/
548
549	coro_init_stacks ();	587	coro_init_stacks (aTHX);
		588
		589	PL_curcop = &PL_compiling;
		590	PL_in_eval = EVAL_NULL;
		591	PL_comppad = 0;
		592	PL_curpm = 0;
		593	PL_localizing = 0;
		594	PL_dirty = 0;
		595	PL_restartop = 0;
550		596
551	{	597	{
552	dSP;	598	dSP;
553	LOGOP myop;	599	LOGOP myop;
554		600
555	/*PL_curcop = 0;*/
556	PL_in_eval = 0;
557	SvREFCNT_dec (GvAV (PL_defgv));	601	SvREFCNT_dec (GvAV (PL_defgv));
558	GvAV (PL_defgv) = coro->args; coro->args = 0;	602	GvAV (PL_defgv) = coro->args; coro->args = 0;
559
560	SPAGAIN;
561		603
562	Zero (&myop, 1, LOGOP);	604	Zero (&myop, 1, LOGOP);
563	myop.op_next = Nullop;	605	myop.op_next = Nullop;
564	myop.op_flags = OPf_WANT_VOID;	606	myop.op_flags = OPf_WANT_VOID;
565		607
		608	PUSHMARK (SP);
		609	XPUSHs (av_shift (GvAV (PL_defgv)));
		610	PUTBACK;
566	PL_op = (OP *)&myop;	611	PL_op = (OP *)&myop;
567
568	PUSHMARK (SP);
569	PUSHMARK (SP);
570	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
571	PUTBACK;
572	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	612	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
573	SPAGAIN;	613	SPAGAIN;
574
575	ENTER; /* necessary e.g. for dounwind */
576	}	614	}
577	}
578		615
		616	ENTER; /* necessary e.g. for dounwind */
		617	}
		618
579	static void	619	static void
580	free_coro_mortal ()	620	free_coro_mortal (pTHX)
581	{	621	{
582	if (coro_mortal)	622	if (coro_mortal)
583	{	623	{
584	SvREFCNT_dec (coro_mortal);	624	SvREFCNT_dec (coro_mortal);
585	coro_mortal = 0;	625	coro_mortal = 0;
586	}	626	}
587	}	627	}
588		628
		629	/* inject a fake call to Coro::State::_cctx_init into the execution */
		630	/* _cctx_init should be careful, as it could be called at almost any time */
		631	/* during execution of a perl program */
589	static void NOINLINE	632	static void NOINLINE
590	prepare_cctx (coro_stack *cctx)	633	prepare_cctx (pTHX_ coro_cctx *cctx)
591	{	634	{
592	dSP;	635	dSP;
593	LOGOP myop;	636	LOGOP myop;
594		637
595	Zero (&myop, 1, LOGOP);	638	Zero (&myop, 1, LOGOP);
596	myop.op_next = PL_op;	639	myop.op_next = PL_op;
597	myop.op_flags = OPf_WANT_VOID;	640	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
598
599	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
600		641
601	PUSHMARK (SP);	642	PUSHMARK (SP);
		643	EXTEND (SP, 2);
		644	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
602	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	645	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
603	PUTBACK;	646	PUTBACK;
		647	PL_op = (OP *)&myop;
604	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
605	SPAGAIN;	649	SPAGAIN;
606	}	650	}
607		651
		652	/*
		653	* this is a _very_ stripped down perl interpreter ;)
		654	*/
608	static void	655	static void
609	coro_run (void *arg)	656	coro_run (void *arg)
610	{	657	{
		658	dTHX;
		659
611	/* coro_run is the alternative epilogue of transfer() */	660	/* coro_run is the alternative tail of transfer(), so unlock here. */
612	UNLOCK;	661	UNLOCK;
613		662
		663	PL_top_env = &PL_start_env;
		664
		665	/* inject a fake subroutine call to cctx_init */
		666	prepare_cctx (aTHX_ (coro_cctx *)arg);
		667
		668	/* somebody or something will hit me for both perl_run and PL_restartop */
		669	PL_restartop = PL_op;
		670	perl_run (PL_curinterp);
		671
614	/*	672	/*
615	* this is a _very_ stripped down perl interpreter ;)	673	* If perl-run returns we assume exit() was being called or the coro
		674	* fell off the end, which seems to be the only valid (non-bug)
		675	* reason for perl_run to return. We try to exit by jumping to the
		676	* bootstrap-time "top" top_env, as we cannot restore the "main"
		677	* coroutine as Coro has no such concept
616	*/	678	*/
617	PL_top_env = &PL_start_env;	679	PL_top_env = main_top_env;
618	/* inject call to cctx_init */	680	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
619	prepare_cctx ((coro_stack *)arg);
620
621	/* somebody will hit me for both perl_run and PL_restartop */
622	perl_run (PL_curinterp);
623
624	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
625	abort ();
626	}	681	}
627		682
628	static coro_stack *	683	static coro_cctx *
629	stack_new ()	684	cctx_new ()
630	{	685	{
631	coro_stack *stack;	686	coro_cctx *cctx;
		687	void *stack_start;
		688	size_t stack_size;
632		689
		690	++cctx_count;
		691
633	New (0, stack, 1, coro_stack);	692	Newz (0, cctx, 1, coro_cctx);
634		693
635	#if HAVE_MMAP	694	#if HAVE_MMAP
636		695
637	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	696	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
638	/* mmap suppsedly does allocate-on-write for us */	697	/* mmap supposedly does allocate-on-write for us */
639	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	698	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
640		699
641	if (stack->sptr == (void *)-1)	700	if (cctx->sptr != (void *)-1)
642	{
643	perror ("FATAL: unable to mmap stack for coroutine");
644	_exit (EXIT_FAILURE);
645	}	701	{
646
647	# if STACKGUARD	702	# if CORO_STACKGUARD
648	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	703	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
649	# endif	704	# endif
650		705	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
651	#else	706	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
652		707	cctx->mapped = 1;
653	stack->ssize = STACKSIZE * (long)sizeof (long);
654	New (0, stack->sptr, STACKSIZE, long);
655
656	if (!stack->sptr)
657	{	708	}
		709	else
		710	#endif
		711	{
		712	cctx->ssize = coro_stacksize * (long)sizeof (long);
		713	New (0, cctx->sptr, coro_stacksize, long);
		714
		715	if (!cctx->sptr)
		716	{
658	perror (stderr, "FATAL: unable to malloc stack for coroutine");	717	perror ("FATAL: unable to allocate stack for coroutine");
659	_exit (EXIT_FAILURE);	718	_exit (EXIT_FAILURE);
660	}	719	}
661		720
662	#endif	721	stack_start = cctx->sptr;
		722	stack_size = cctx->ssize;
		723	}
663		724
		725	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
664	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	726	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
665		727
666	return stack;	728	return cctx;
667	}	729	}
668		730
669	static void	731	static void
670	stack_free (coro_stack *stack)	732	cctx_destroy (coro_cctx *cctx)
671	{	733	{
672	if (!stack)	734	if (!cctx)
673	return;	735	return;
674		736
		737	--cctx_count;
		738
		739	#if CORO_USE_VALGRIND
		740	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		741	#endif
		742
675	#if HAVE_MMAP	743	#if HAVE_MMAP
		744	if (cctx->mapped)
676	munmap (stack->sptr, stack->ssize);	745	munmap (cctx->sptr, cctx->ssize);
677	#else	746	else
		747	#endif
678	Safefree (stack->sptr);	748	Safefree (cctx->sptr);
679	#endif
680		749
681	Safefree (stack);	750	Safefree (cctx);
682	}	751	}
683		752
684	static coro_stack *stack_first;
685	static int cctx_count, cctx_idle;
686
687	static coro_stack *	753	static coro_cctx *
688	stack_get ()	754	cctx_get (pTHX)
689	{	755	{
690	coro_stack *stack;	756	while (cctx_first)
691
692	if (stack_first)
693	{	757	{
		758	coro_cctx *cctx = cctx_first;
		759	cctx_first = cctx->next;
694	--cctx_idle;	760	--cctx_idle;
695	stack = stack_first;	761
696	stack_first = stack->next;	762	if (cctx->ssize >= coro_stacksize)
		763	return cctx;
		764
		765	cctx_destroy (cctx);
697	}	766	}
698	else	767
699	{
700	++cctx_count;
701	stack = stack_new ();
702	PL_op = PL_op->op_next;	768	PL_op = PL_op->op_next;
		769	return cctx_new ();
		770	}
		771
		772	static void
		773	cctx_put (coro_cctx *cctx)
		774	{
		775	/* free another cctx if overlimit */
		776	if (cctx_idle >= MAX_IDLE_CCTX)
		777	{
		778	coro_cctx *first = cctx_first;
		779	cctx_first = first->next;
		780	--cctx_idle;
		781
		782	assert (!first->inuse);
		783	cctx_destroy (first);
703	}	784	}
704		785
705	return stack;
706	}
707
708	static void
709	stack_put (coro_stack *stack)
710	{
711	++cctx_idle;	786	++cctx_idle;
712	stack->next = stack_first;	787	cctx->next = cctx_first;
713	stack_first = stack;	788	cctx_first = cctx;
714	}	789	}
		790
		791	/** coroutine switching *****************************************************/
715		792
716	/* never call directly, always through the coro_state_transfer global variable */	793	/* never call directly, always through the coro_state_transfer global variable */
717	static void NOINLINE	794	static void NOINLINE
718	transfer (struct coro *prev, struct coro *next, int flags)	795	transfer (pTHX_ struct coro *prev, struct coro *next)
719	{	796	{
720	dSTACKLEVEL;	797	dSTACKLEVEL;
721		798
722	/* sometimes transfer is only called to set idle_sp */	799	/* sometimes transfer is only called to set idle_sp */
723	if (flags == TRANSFER_SET_STACKLEVEL)	800	if (!next)
		801	{
724	((coro_stack *)prev)->idle_sp = STACKLEVEL;	802	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		803	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		804	}
725	else if (prev != next)	805	else if (prev != next)
726	{	806	{
727	coro_stack *prev__stack;	807	coro_cctx *prev__cctx;
		808
		809	if (prev->flags & CF_NEW)
		810	{
		811	/* create a new empty context */
		812	Newz (0, prev->cctx, 1, coro_cctx);
		813	prev->cctx->inuse = 1;
		814	prev->flags &= ~CF_NEW;
		815	prev->flags |= CF_RUNNING;
		816	}
		817
		818	/*TODO: must not croak here */
		819	if (!prev->flags & CF_RUNNING)
		820	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		821
		822	if (next->flags & CF_RUNNING)
		823	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		824
		825	if (next->flags & CF_DESTROYED)
		826	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		827
		828	prev->flags &= ~CF_RUNNING;
		829	next->flags |= CF_RUNNING;
728		830
729	LOCK;	831	LOCK;
730		832
731	if (next->mainstack)	833	if (next->flags & CF_NEW)
732	{	834	{
733	/* coroutine already started */	835	/* need to start coroutine */
734	SAVE (prev, flags);	836	next->flags &= ~CF_NEW;
735	LOAD (next);	837	/* first get rid of the old state */
		838	save_perl (aTHX_ prev);
		839	/* setup coroutine call */
		840	setup_coro (aTHX_ next);
		841	/* need a new stack */
		842	assert (!next->cctx);
736	}	843	}
737	else	844	else
738	{	845	{
739	/* need to start coroutine */	846	/* coroutine already started */
740	/* first get rid of the old state */	847	save_perl (aTHX_ prev);
741	SAVE (prev, -1);	848	load_perl (aTHX_ next);
742	/* setup coroutine call */
743	setup_coro (next);
744	/* need a stack */
745	next->stack = 0;
746	}	849	}
747		850
748	if (!prev->stack)
749	/* create a new empty context */
750	Newz (0, prev->stack, 1, coro_stack);
751
752	prev__stack = prev->stack;	851	prev__cctx = prev->cctx;
753		852
754	/* possibly "free" the stack */	853	/* possibly "free" the cctx */
755	if (prev__stack->idle_sp == STACKLEVEL)	854	if (prev__cctx->idle_sp == STACKLEVEL)
756	{	855	{
757	stack_put (prev__stack);	856	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		857	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		858
758	prev->stack = 0;	859	prev->cctx = 0;
		860
		861	cctx_put (prev__cctx);
		862	prev__cctx->inuse = 0;
759	}	863	}
760		864
761	if (!next->stack)	865	if (!next->cctx)
762	next->stack = stack_get ();
763
764	if (prev__stack != next->stack)
765	{	866	{
766	prev__stack->top_env = PL_top_env;	867	next->cctx = cctx_get (aTHX);
767	PL_top_env = next->stack->top_env;	868	assert (!next->cctx->inuse);
768	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	869	next->cctx->inuse = 1;
769	}	870	}
770		871
		872	if (prev__cctx != next->cctx)
		873	{
		874	prev__cctx->top_env = PL_top_env;
		875	PL_top_env = next->cctx->top_env;
		876	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		877	}
		878
771	free_coro_mortal ();	879	free_coro_mortal (aTHX);
772
773	UNLOCK;	880	UNLOCK;
774	}	881	}
775	}	882	}
776		883
777	struct transfer_args	884	struct transfer_args
778	{	885	{
779	struct coro *prev, *next;	886	struct coro *prev, *next;
780	int flags;
781	};	887	};
782		888
783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	889	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
784		890
		891	/** high level stuff ********************************************************/
		892
785	static void	893	static int
786	coro_state_destroy (struct coro *coro)	894	coro_state_destroy (pTHX_ struct coro *coro)
787	{	895	{
788	if (coro->refcnt--)	896	if (coro->flags & CF_DESTROYED)
789	return;	897	return 0;
		898
		899	coro->flags |= CF_DESTROYED;
		900
		901	if (coro->flags & CF_READY)
		902	{
		903	/* reduce nready, as destroying a ready coro effectively unreadies it */
		904	/* alternative: look through all ready queues and remove the coro */
		905	LOCK;
		906	--coro_nready;
		907	UNLOCK;
		908	}
		909	else
		910	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		911
791	if (coro->mainstack && coro->mainstack != main_mainstack)	912	if (coro->mainstack && coro->mainstack != main_mainstack)
792	{	913	{
793	struct coro temp;	914	struct coro temp;
794		915
795	SAVE ((&temp), TRANSFER_SAVE_ALL);	916	assert (!(coro->flags & CF_RUNNING));
796	LOAD (coro);
797		917
		918	Zero (&temp, 1, struct coro);
		919	temp.save = CORO_SAVE_ALL;
		920
		921	if (coro->flags & CF_RUNNING)
		922	croak ("FATAL: tried to destroy currently running coroutine");
		923
		924	save_perl (aTHX_ &temp);
		925	load_perl (aTHX_ coro);
		926
798	coro_destroy_stacks ();	927	coro_destroy_stacks (aTHX);
799		928
800	LOAD ((&temp)); /* this will get rid of defsv etc.. */	929	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
801		930
802	coro->mainstack = 0;	931	coro->mainstack = 0;
803	}	932	}
804		933
805	stack_free (coro->stack);	934	cctx_destroy (coro->cctx);
806	SvREFCNT_dec (coro->args);	935	SvREFCNT_dec (coro->args);
807	Safefree (coro);	936
		937	if (coro->next) coro->next->prev = coro->prev;
		938	if (coro->prev) coro->prev->next = coro->next;
		939	if (coro == coro_first) coro_first = coro->next;
		940
		941	return 1;
808	}	942	}
809		943
810	static int	944	static int
811	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	945	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
812	{	946	{
813	struct coro *coro = (struct coro *)mg->mg_ptr;	947	struct coro *coro = (struct coro *)mg->mg_ptr;
814	mg->mg_ptr = 0;	948	mg->mg_ptr = 0;
815		949
		950	coro->hv = 0;
		951
		952	if (--coro->refcnt < 0)
		953	{
816	coro_state_destroy (coro);	954	coro_state_destroy (aTHX_ coro);
		955	Safefree (coro);
		956	}
817		957
818	return 0;	958	return 0;
819	}	959	}
820		960
821	static int	961	static int
…		…
828	return 0;	968	return 0;
829	}	969	}
830		970
831	static MGVTBL coro_state_vtbl = {	971	static MGVTBL coro_state_vtbl = {
832	0, 0, 0, 0,	972	0, 0, 0, 0,
833	coro_state_clear,	973	coro_state_free,
834	0,	974	0,
835	#ifdef MGf_DUP	975	#ifdef MGf_DUP
836	coro_state_dup,	976	coro_state_dup,
837	#else	977	#else
838	# define MGf_DUP 0	978	# define MGf_DUP 0
839	#endif	979	#endif
840	};	980	};
841		981
842	static struct coro *	982	static struct coro *
843	SvSTATE (SV *coro)	983	SvSTATE_ (pTHX_ SV *coro)
844	{	984	{
845	HV *stash;	985	HV *stash;
846	MAGIC *mg;	986	MAGIC *mg;
847		987
848	if (SvROK (coro))	988	if (SvROK (coro))
…		…
854	/* very slow, but rare, check */	994	/* very slow, but rare, check */
855	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	995	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
856	croak ("Coro::State object required");	996	croak ("Coro::State object required");
857	}	997	}
858		998
859	mg = SvMAGIC (coro);	999	mg = CORO_MAGIC (coro);
860	assert (mg->mg_type == PERL_MAGIC_ext);
861	return (struct coro *)mg->mg_ptr;	1000	return (struct coro *)mg->mg_ptr;
862	}	1001	}
863		1002
		1003	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1004
864	static void	1005	static void
865	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1006	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
866	{	1007	{
867	ta->prev = SvSTATE (prev);	1008	ta->prev = SvSTATE (prev_sv);
868	ta->next = SvSTATE (next);	1009	ta->next = SvSTATE (next_sv);
869	ta->flags = flags;
870	}	1010	}
871		1011
872	static void	1012	static void
873	api_transfer (SV *prev, SV *next, int flags)	1013	api_transfer (SV *prev_sv, SV *next_sv)
874	{	1014	{
875	dTHX;	1015	dTHX;
876	struct transfer_args ta;	1016	struct transfer_args ta;
877		1017
878	prepare_transfer (&ta, prev, next, flags);	1018	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
879	TRANSFER (ta);	1019	TRANSFER (ta);
880	}	1020	}
881		1021
		1022	static int
		1023	api_save (SV *coro_sv, int new_save)
		1024	{
		1025	dTHX;
		1026	struct coro *coro = SvSTATE (coro_sv);
		1027	int old_save = coro->save;
		1028
		1029	if (new_save >= 0)
		1030	coro->save = new_save;
		1031
		1032	return old_save;
		1033	}
		1034
882	/** Coro ********************************************************************/	1035	/** Coro ********************************************************************/
883		1036
884	#define PRIO_MAX 3
885	#define PRIO_HIGH 1
886	#define PRIO_NORMAL 0
887	#define PRIO_LOW -1
888	#define PRIO_IDLE -3
889	#define PRIO_MIN -4
890
891	/* for Coro.pm */
892	static GV *coro_current, *coro_idle;
893	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
894	static int coro_nready;
895
896	static void	1037	static void
897	coro_enq (SV *sv)	1038	coro_enq (pTHX_ SV *coro_sv)
898	{	1039	{
899	int prio;
900
901	if (SvTYPE (sv) != SVt_PVHV)
902	croak ("Coro::ready tried to enqueue something that is not a coroutine");
903
904	prio = SvSTATE (sv)->prio;
905
906	av_push (coro_ready [prio - PRIO_MIN], sv);	1040	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
907	coro_nready++;
908	}	1041	}
909		1042
910	static SV *	1043	static SV *
911	coro_deq (int min_prio)	1044	coro_deq (pTHX_ int min_prio)
912	{	1045	{
913	int prio = PRIO_MAX - PRIO_MIN;	1046	int prio = PRIO_MAX - PRIO_MIN;
914		1047
915	min_prio -= PRIO_MIN;	1048	min_prio -= PRIO_MIN;
916	if (min_prio < 0)	1049	if (min_prio < 0)
917	min_prio = 0;	1050	min_prio = 0;
918		1051
919	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1052	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
920	if (AvFILLp (coro_ready [prio]) >= 0)	1053	if (AvFILLp (coro_ready [prio]) >= 0)
921	{
922	coro_nready--;
923	return av_shift (coro_ready [prio]);	1054	return av_shift (coro_ready [prio]);
924	}
925		1055
926	return 0;	1056	return 0;
927	}	1057	}
928		1058
929	static void	1059	static int
930	api_ready (SV *coro)	1060	api_ready (SV *coro_sv)
931	{	1061	{
932	dTHX;	1062	dTHX;
		1063	struct coro *coro;
933		1064
934	if (SvROK (coro))	1065	if (SvROK (coro_sv))
935	coro = SvRV (coro);	1066	coro_sv = SvRV (coro_sv);
		1067
		1068	coro = SvSTATE (coro_sv);
		1069
		1070	if (coro->flags & CF_READY)
		1071	return 0;
		1072
		1073	coro->flags |= CF_READY;
936		1074
937	LOCK;	1075	LOCK;
938	coro_enq (SvREFCNT_inc (coro));	1076	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1077	++coro_nready;
939	UNLOCK;	1078	UNLOCK;
940	}
941		1079
		1080	return 1;
		1081	}
		1082
942	static void	1083	static int
		1084	api_is_ready (SV *coro_sv)
		1085	{
		1086	dTHX;
		1087	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1088	}
		1089
		1090	static void
943	prepare_schedule (struct transfer_args *ta)	1091	prepare_schedule (pTHX_ struct transfer_args *ta)
944	{	1092	{
945	SV *current, *prev, *next;	1093	SV *prev_sv, *next_sv;
946
947	current = GvSV (coro_current);
948		1094
949	for (;;)	1095	for (;;)
950	{	1096	{
951	LOCK;	1097	LOCK;
952	next = coro_deq (PRIO_MIN);	1098	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1099
		1100	/* nothing to schedule: call the idle handler */
		1101	if (!next_sv)
		1102	{
		1103	dSP;
		1104	UNLOCK;
		1105
		1106	ENTER;
		1107	SAVETMPS;
		1108
		1109	PUSHMARK (SP);
		1110	PUTBACK;
		1111	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1112
		1113	FREETMPS;
		1114	LEAVE;
		1115	continue;
		1116	}
		1117
		1118	ta->next = SvSTATE (next_sv);
		1119
		1120	/* cannot transfer to destroyed coros, skip and look for next */
		1121	if (ta->next->flags & CF_DESTROYED)
		1122	{
		1123	UNLOCK;
		1124	SvREFCNT_dec (next_sv);
		1125	/* coro_nready is already taken care of by destroy */
		1126	continue;
		1127	}
		1128
		1129	--coro_nready;
953	UNLOCK;	1130	UNLOCK;
954
955	if (next)
956	break;	1131	break;
957
958	{
959	dSP;
960
961	ENTER;
962	SAVETMPS;
963
964	PUSHMARK (SP);
965	PUTBACK;
966	call_sv (GvSV (coro_idle), G_DISCARD);
967
968	FREETMPS;
969	LEAVE;
970	}	1132	}
971	}
972
973	prev = SvRV (current);
974	SvRV (current) = next;
975		1133
976	/* free this only after the transfer */	1134	/* free this only after the transfer */
		1135	prev_sv = SvRV (coro_current);
		1136	SvRV_set (coro_current, next_sv);
		1137	ta->prev = SvSTATE (prev_sv);
		1138
		1139	assert (ta->next->flags & CF_READY);
		1140	ta->next->flags &= ~CF_READY;
		1141
977	LOCK;	1142	LOCK;
978	free_coro_mortal ();	1143	free_coro_mortal (aTHX);
		1144	coro_mortal = prev_sv;
979	UNLOCK;	1145	UNLOCK;
980	coro_mortal = prev;
981
982	ta->prev = SvSTATE (prev);
983	ta->next = SvSTATE (next);
984	ta->flags = TRANSFER_SAVE_ALL;
985	}	1146	}
986		1147
987	static void	1148	static void
988	prepare_cede (struct transfer_args *ta)	1149	prepare_cede (pTHX_ struct transfer_args *ta)
989	{	1150	{
990	LOCK;	1151	api_ready (coro_current);
991	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
992	UNLOCK;
993
994	prepare_schedule (ta);	1152	prepare_schedule (aTHX_ ta);
		1153	}
		1154
		1155	static int
		1156	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1157	{
		1158	if (coro_nready)
		1159	{
		1160	SV *prev = SvRV (coro_current);
		1161	prepare_schedule (aTHX_ ta);
		1162	api_ready (prev);
		1163	return 1;
		1164	}
		1165	else
		1166	return 0;
995	}	1167	}
996		1168
997	static void	1169	static void
998	api_schedule (void)	1170	api_schedule (void)
999	{	1171	{
1000	dTHX;	1172	dTHX;
1001	struct transfer_args ta;	1173	struct transfer_args ta;
1002		1174
1003	prepare_schedule (&ta);	1175	prepare_schedule (aTHX_ &ta);
1004	TRANSFER (ta);	1176	TRANSFER (ta);
1005	}	1177	}
1006		1178
1007	static void	1179	static int
1008	api_cede (void)	1180	api_cede (void)
1009	{	1181	{
1010	dTHX;	1182	dTHX;
1011	struct transfer_args ta;	1183	struct transfer_args ta;
1012		1184
1013	prepare_cede (&ta);	1185	prepare_cede (aTHX_ &ta);
		1186
		1187	if (ta.prev != ta.next)
		1188	{
1014	TRANSFER (ta);	1189	TRANSFER (ta);
		1190	return 1;
		1191	}
		1192	else
		1193	return 0;
		1194	}
		1195
		1196	static int
		1197	api_cede_notself (void)
		1198	{
		1199	dTHX;
		1200	struct transfer_args ta;
		1201
		1202	if (prepare_cede_notself (aTHX_ &ta))
		1203	{
		1204	TRANSFER (ta);
		1205	return 1;
		1206	}
		1207	else
		1208	return 0;
1015	}	1209	}
1016		1210
1017	MODULE = Coro::State PACKAGE = Coro::State	1211	MODULE = Coro::State PACKAGE = Coro::State
1018		1212
1019	PROTOTYPES: DISABLE	1213	PROTOTYPES: DISABLE
…		…
1025	#endif	1219	#endif
1026	BOOT_PAGESIZE;	1220	BOOT_PAGESIZE;
1027		1221
1028	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1222	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029		1223
1030	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1031	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1032	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1226	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1227	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1228	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1229	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1230	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1033		1231
1034	main_mainstack = PL_mainstack;	1232	main_mainstack = PL_mainstack;
		1233	main_top_env = PL_top_env;
		1234
		1235	while (main_top_env->je_prev)
		1236	main_top_env = main_top_env->je_prev;
1035		1237
1036	coroapi.ver = CORO_API_VERSION;	1238	coroapi.ver = CORO_API_VERSION;
1037	coroapi.transfer = api_transfer;	1239	coroapi.transfer = api_transfer;
1038		1240
1039	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1241	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1047	HV *hv;	1249	HV *hv;
1048	int i;	1250	int i;
1049		1251
1050	Newz (0, coro, 1, struct coro);	1252	Newz (0, coro, 1, struct coro);
1051	coro->args = newAV ();	1253	coro->args = newAV ();
		1254	coro->save = CORO_SAVE_DEF;
		1255	coro->flags = CF_NEW;
1052		1256
		1257	if (coro_first) coro_first->prev = coro;
		1258	coro->next = coro_first;
		1259	coro_first = coro;
		1260
1053	hv = newHV ();	1261	coro->hv = hv = newHV ();
1054	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1262	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1055	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1263	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056		1264
1057	for (i = 1; i < items; i++)	1265	for (i = 1; i < items; i++)
1058	av_push (coro->args, newSVsv (ST (i)));	1266	av_push (coro->args, newSVsv (ST (i)));
1059
1060	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1061	/*coro->stack = 0;*/
1062	}	1267	}
1063	OUTPUT:	1268	OUTPUT:
		1269	RETVAL
		1270
		1271	int
		1272	save (SV *coro, int new_save = -1)
		1273	CODE:
		1274	RETVAL = api_save (coro, new_save);
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
		1279	save_also (SV *coro_sv, int save_also)
		1280	CODE:
		1281	{
		1282	struct coro *coro = SvSTATE (coro_sv);
		1283	RETVAL = coro->save;
		1284	coro->save |= save_also;
		1285	}
		1286	OUTPUT:
1064	RETVAL	1287	RETVAL
1065		1288
1066	void	1289	void
1067	_set_stacklevel (...)	1290	_set_stacklevel (...)
1068	ALIAS:	1291	ALIAS:
1069	Coro::State::transfer = 1	1292	Coro::State::transfer = 1
1070	Coro::schedule = 2	1293	Coro::schedule = 2
1071	Coro::cede = 3	1294	Coro::cede = 3
1072	Coro::Cont::yield = 4	1295	Coro::cede_notself = 4
1073	CODE:	1296	CODE:
1074	{	1297	{
1075	struct transfer_args ta;	1298	struct transfer_args ta;
1076		1299
1077	switch (ix)	1300	switch (ix)
1078	{	1301	{
1079	case 0:	1302	case 0:
1080	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1303	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1081	ta.next = 0;	1304	ta.next = 0;
1082	ta.flags = TRANSFER_SET_STACKLEVEL;
1083	break;	1305	break;
1084		1306
1085	case 1:	1307	case 1:
1086	if (items != 3)	1308	if (items != 2)
1087	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1309	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1088		1310
1089	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1311	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1090	break;	1312	break;
1091		1313
1092	case 2:	1314	case 2:
1093	prepare_schedule (&ta);	1315	prepare_schedule (aTHX_ &ta);
1094	break;	1316	break;
1095		1317
1096	case 3:	1318	case 3:
1097	prepare_cede (&ta);	1319	prepare_cede (aTHX_ &ta);
1098	break;	1320	break;
1099		1321
1100	case 4:	1322	case 4:
1101	{	1323	if (!prepare_cede_notself (aTHX_ &ta))
1102	SV *yieldstack;	1324	XSRETURN_EMPTY;
1103	SV *sv;
1104	AV *defav = GvAV (PL_defgv);
1105		1325
1106	yieldstack = *hv_fetch (
1107	(HV *)SvRV (GvSV (coro_current)),
1108	"yieldstack", sizeof ("yieldstack") - 1,
1109	0
1110	);
1111
1112	/* set up @_ -- ugly */
1113	av_clear (defav);
1114	av_fill (defav, items - 1);
1115	while (items--)
1116	av_store (defav, items, SvREFCNT_inc (ST(items)));
1117
1118	sv = av_pop ((AV *)SvRV (yieldstack));
1119	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1120	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1121	ta.flags = 0;
1122	SvREFCNT_dec (sv);
1123	}
1124	break;	1326	break;
1125
1126	}	1327	}
1127		1328
		1329	BARRIER;
1128	TRANSFER (ta);	1330	TRANSFER (ta);
1129	}
1130		1331
1131	void	1332	if (GIMME_V != G_VOID && ta.next != ta.prev)
1132	_clone_state_from (SV *dst, SV *src)	1333	XSRETURN_YES;
		1334	}
		1335
		1336	bool
		1337	_destroy (SV *coro_sv)
1133	CODE:	1338	CODE:
1134	{	1339	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1135	struct coro *coro_src = SvSTATE (src);	1340	OUTPUT:
1136		1341	RETVAL
1137	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1138
1139	++coro_src->refcnt;
1140	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1141	}
1142		1342
1143	void	1343	void
1144	_exit (code)	1344	_exit (code)
1145	int code	1345	int code
1146	PROTOTYPE: $	1346	PROTOTYPE: $
1147	CODE:	1347	CODE:
1148	_exit (code);	1348	_exit (code);
1149		1349
		1350	int
		1351	cctx_stacksize (int new_stacksize = 0)
		1352	CODE:
		1353	RETVAL = coro_stacksize;
		1354	if (new_stacksize)
		1355	coro_stacksize = new_stacksize;
		1356	OUTPUT:
		1357	RETVAL
		1358
		1359	int
		1360	cctx_count ()
		1361	CODE:
		1362	RETVAL = cctx_count;
		1363	OUTPUT:
		1364	RETVAL
		1365
		1366	int
		1367	cctx_idle ()
		1368	CODE:
		1369	RETVAL = cctx_idle;
		1370	OUTPUT:
		1371	RETVAL
		1372
		1373	void
		1374	list ()
		1375	PPCODE:
		1376	{
		1377	struct coro *coro;
		1378	for (coro = coro_first; coro; coro = coro->next)
		1379	if (coro->hv)
		1380	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1381	}
		1382
		1383	void
		1384	call (Coro::State coro, SV *coderef)
		1385	ALIAS:
		1386	eval = 1
		1387	CODE:
		1388	{
		1389	if (coro->mainstack)
		1390	{
		1391	struct coro temp;
		1392	Zero (&temp, 1, struct coro);
		1393	temp.save = CORO_SAVE_ALL;
		1394
		1395	if (!(coro->flags & CF_RUNNING))
		1396	{
		1397	save_perl (aTHX_ &temp);
		1398	load_perl (aTHX_ coro);
		1399	}
		1400
		1401	{
		1402	dSP;
		1403	ENTER;
		1404	SAVETMPS;
		1405	PUSHMARK (SP);
		1406	PUTBACK;
		1407	if (ix)
		1408	eval_sv (coderef, 0);
		1409	else
		1410	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1411	SPAGAIN;
		1412	FREETMPS;
		1413	LEAVE;
		1414	PUTBACK;
		1415	}
		1416
		1417	if (!(coro->flags & CF_RUNNING))
		1418	{
		1419	save_perl (aTHX_ coro);
		1420	load_perl (aTHX_ &temp);
		1421	}
		1422	}
		1423	}
		1424
		1425	SV *
		1426	is_ready (Coro::State coro)
		1427	PROTOTYPE: $
		1428	ALIAS:
		1429	is_ready = CF_READY
		1430	is_running = CF_RUNNING
		1431	is_new = CF_NEW
		1432	is_destroyed = CF_DESTROYED
		1433	CODE:
		1434	RETVAL = boolSV (coro->flags & ix);
		1435	OUTPUT:
		1436	RETVAL
		1437
		1438	SV *
		1439	has_stack (Coro::State coro)
		1440	PROTOTYPE: $
		1441	CODE:
		1442	RETVAL = boolSV (!!coro->cctx);
		1443	OUTPUT:
		1444	RETVAL
		1445
		1446	IV
		1447	rss (Coro::State coro)
		1448	PROTOTYPE: $
		1449	CODE:
		1450	RETVAL = coro_rss (coro);
		1451	OUTPUT:
		1452	RETVAL
		1453
		1454
1150	MODULE = Coro::State PACKAGE = Coro	1455	MODULE = Coro::State PACKAGE = Coro
1151		1456
1152	BOOT:	1457	BOOT:
1153	{	1458	{
1154	int i;	1459	int i;
		1460
		1461	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1462	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1463	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1464
		1465	coro_current = get_sv ("Coro::current", FALSE);
		1466	SvREADONLY_on (coro_current);
1155		1467
1156	coro_stash = gv_stashpv ("Coro", TRUE);	1468	coro_stash = gv_stashpv ("Coro", TRUE);
1157		1469
1158	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1470	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1159	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1471	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1160	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1472	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1161	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1473	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1162	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1474	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1163	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1475	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1164		1476
1165	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1166	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1167
1168	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1477	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1169	coro_ready[i] = newAV ();	1478	coro_ready[i] = newAV ();
1170		1479
1171	{	1480	{
1172	SV *sv = perl_get_sv("Coro::API", 1);	1481	SV *sv = perl_get_sv("Coro::API", 1);
1173		1482
1174	coroapi.schedule = api_schedule;	1483	coroapi.schedule = api_schedule;
		1484	coroapi.save = api_save;
1175	coroapi.cede = api_cede;	1485	coroapi.cede = api_cede;
		1486	coroapi.cede_notself = api_cede_notself;
1176	coroapi.ready = api_ready;	1487	coroapi.ready = api_ready;
		1488	coroapi.is_ready = api_is_ready;
1177	coroapi.nready = &coro_nready;	1489	coroapi.nready = &coro_nready;
1178	coroapi.current = coro_current;	1490	coroapi.current = coro_current;
1179		1491
1180	GCoroAPI = &coroapi;	1492	GCoroAPI = &coroapi;
1181	sv_setiv (sv, (IV)&coroapi);	1493	sv_setiv (sv, (IV)&coroapi);
1182	SvREADONLY_on (sv);	1494	SvREADONLY_on (sv);
1183	}	1495	}
1184	}	1496	}
		1497
		1498	void
		1499	_set_current (SV *current)
		1500	PROTOTYPE: $
		1501	CODE:
		1502	SvREFCNT_dec (SvRV (coro_current));
		1503	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1185		1504
1186	int	1505	int
1187	prio (Coro::State coro, int newprio = 0)	1506	prio (Coro::State coro, int newprio = 0)
1188	ALIAS:	1507	ALIAS:
1189	nice = 1	1508	nice = 1
…		…
1192	RETVAL = coro->prio;	1511	RETVAL = coro->prio;
1193		1512
1194	if (items > 1)	1513	if (items > 1)
1195	{	1514	{
1196	if (ix)	1515	if (ix)
1197	newprio += coro->prio;	1516	newprio = coro->prio - newprio;
1198		1517
1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1518	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1519	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1201		1520
1202	coro->prio = newprio;	1521	coro->prio = newprio;
1203	}	1522	}
1204	}	1523	}
		1524	OUTPUT:
		1525	RETVAL
1205		1526
1206	void	1527	SV *
1207	ready (SV *self)	1528	ready (SV *self)
1208	PROTOTYPE: $	1529	PROTOTYPE: $
1209	CODE:	1530	CODE:
1210	api_ready (self);	1531	RETVAL = boolSV (api_ready (self));
		1532	OUTPUT:
		1533	RETVAL
1211		1534
1212	int	1535	int
1213	nready (...)	1536	nready (...)
1214	PROTOTYPE:	1537	PROTOTYPE:
1215	CODE:	1538	CODE:
1216	RETVAL = coro_nready;	1539	RETVAL = coro_nready;
1217	OUTPUT:	1540	OUTPUT:
1218	RETVAL	1541	RETVAL
1219		1542
		1543	# for async_pool speedup
		1544	void
		1545	_pool_1 (SV *cb)
		1546	CODE:
		1547	{
		1548	int i, len;
		1549	HV *hv = (HV *)SvRV (coro_current);
		1550	AV *defav = GvAV (PL_defgv);
		1551	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1552	AV *invoke_av;
		1553
		1554	if (!invoke)
		1555	croak ("\3terminate\2\n");
		1556
		1557	hv_store (hv, "desc", sizeof ("desc") - 1,
		1558	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1559
		1560	invoke_av = (AV *)SvRV (invoke);
		1561	len = av_len (invoke_av);
		1562
		1563	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1564
		1565	if (len > 0)
		1566	{
		1567	av_fill (defav, len - 1);
		1568	for (i = 0; i < len; ++i)
		1569	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1570	}
		1571
		1572	SvREFCNT_dec (invoke);
		1573	}
		1574
		1575	void
		1576	_pool_2 (SV *cb)
		1577	CODE:
		1578	{
		1579	struct coro *coro = SvSTATE (coro_current);
		1580
		1581	sv_setsv (cb, &PL_sv_undef);
		1582
		1583	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1584	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1585	croak ("\3terminate\2\n");
		1586
		1587	av_clear (GvAV (PL_defgv));
		1588	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1589	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1590	coro->save = CORO_SAVE_DEF;
		1591	coro->prio = 0;
		1592	av_push (av_async_pool, newSVsv (coro_current));
		1593	}
		1594
		1595
1220	MODULE = Coro::State PACKAGE = Coro::AIO	1596	MODULE = Coro::State PACKAGE = Coro::AIO
1221		1597
1222	SV *	1598	SV *
1223	_get_state ()	1599	_get_state ()
1224	CODE:	1600	CODE:
1225	{	1601	{
1226	struct {	1602	struct io_state *data;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} data;
1232		1603
		1604	RETVAL = newSV (sizeof (struct io_state));
		1605	data = (struct io_state *)SvPVX (RETVAL);
		1606	SvCUR_set (RETVAL, sizeof (struct io_state));
		1607	SvPOK_only (RETVAL);
		1608
1233	data.errorno = errno;	1609	data->errorno = errno;
1234	data.laststype = PL_laststype;	1610	data->laststype = PL_laststype;
1235	data.laststatval = PL_laststatval;	1611	data->laststatval = PL_laststatval;
1236	data.statcache = PL_statcache;	1612	data->statcache = PL_statcache;
1237
1238	RETVAL = newSVpvn ((char *)&data, sizeof data);
1239	}	1613	}
1240	OUTPUT:	1614	OUTPUT:
1241	RETVAL	1615	RETVAL
1242		1616
1243	void	1617	void
1244	_set_state (char *data_)	1618	_set_state (char *data_)
1245	PROTOTYPE: $	1619	PROTOTYPE: $
1246	CODE:	1620	CODE:
1247	{	1621	{
1248	struct {	1622	struct io_state *data = (void *)data_;
1249	int errorno;
1250	int laststype;
1251	int laststatval;
1252	Stat_t statcache;
1253	} *data = (void *)data_;
1254		1623
1255	errno = data->errorno;	1624	errno = data->errorno;
1256	PL_laststype = data->laststype;	1625	PL_laststype = data->laststype;
1257	PL_laststatval = data->laststatval;	1626	PL_laststatval = data->laststatval;
1258	PL_statcache = data->statcache;	1627	PL_statcache = data->statcache;
1259	}	1628	}
		1629

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