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Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.163 by root, Mon Sep 24 18:30:58 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
34		79
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	81	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	82	#endif
53	# include <limits.h>	83
54	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	86	#endif
61	#endif
62		87
63	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* 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. */
66	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
68		97
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		99
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
72		109
73	#include "CoroAPI.h"	110	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		111
77	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	116	#else
82	# define LOCK (void)0	117	# define LOCK (void)0
83	# define UNLOCK (void)0	118	# define UNLOCK (void)0
84	#endif	119	#endif
85		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;
86	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
87	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;
88	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
89	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
90		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
91	/* this is a structure representing a c-level coroutine */	145	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	146	typedef struct coro_cctx {
93	struct coro_stack *next;	147	struct coro_cctx *next;
94		148
95	/* the stack */	149	/* the stack */
96	void *sptr;	150	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	151	size_t ssize;
98		152
99	/* cpu state */	153	/* cpu state */
100	void *idle_sp; /* original stacklevel when coroutine was created */	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 */
101	JMPENV *top_env;	156	JMPENV *top_env;
102	coro_context cctx;	157	coro_context cctx;
103	} coro_stack;
104		158
105	/* the (fake) coro_stack representing the main program */	159	#if CORO_USE_VALGRIND
106	static coro_stack *main_stack;	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	};
107		171
108	/* this is a structure representing a perl-level coroutine */	172	/* this is a structure representing a perl-level coroutine */
109	struct coro {	173	struct coro {
110	/* the c coroutine allocated to this perl coroutine, if any */	174	/* the c coroutine allocated to this perl coroutine, if any */
111	coro_stack *stack;	175	coro_cctx *cctx;
112		176
113	/* data associated with this coroutine (initial args) */	177	/* data associated with this coroutine (initial args) */
114	AV *args;	178	AV *args;
115	int refcnt;	179	int refcnt;
		180	int save; /* CORO_SAVE flags */
		181	int flags; /* CF_ flags */
116		182
117	/* optionally saved, might be zero */	183	/* optionally saved, might be zero */
118	AV *defav;	184	AV *defav; /* @_ */
119	SV *defsv;	185	SV *defsv; /* $_ */
120	SV *errsv;	186	SV *errsv; /* $@ */
		187	GV *deffh; /* default filehandle */
		188	SV *irssv; /* $/ */
		189	SV *irssv_sv; /* real $/ cache */
121		190
122	/* saved global state not related to stacks */	191	#define VAR(name,type) type name;
123	U8 dowarn;	192	# include "state.h"
124	I32 in_eval;	193	#undef VAR
125
126	/* the stacks and related info (callchain etc..) */
127	PERL_SI *curstackinfo;
128	AV *curstack;
129	AV *mainstack;
130	SV **stack_sp;
131	OP *op;
132	SV **curpad;
133	AV *comppad;
134	CV *compcv;
135	SV **stack_base;
136	SV **stack_max;
137	SV **tmps_stack;
138	I32 tmps_floor;
139	I32 tmps_ix;
140	I32 tmps_max;
141	I32 *markstack;
142	I32 *markstack_ptr;
143	I32 *markstack_max;
144	I32 *scopestack;
145	I32 scopestack_ix;
146	I32 scopestack_max;
147	ANY *savestack;
148	I32 savestack_ix;
149	I32 savestack_max;
150	OP **retstack;
151	I32 retstack_ix;
152	I32 retstack_max;
153	PMOP *curpm;
154	COP *curcop;
155		194
156	/* coro process data */	195	/* coro process data */
157	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 */
158	};	201	};
159		202
160	typedef struct coro *Coro__State;	203	typedef struct coro *Coro__State;
161	typedef struct coro *Coro__State_or_hashref;	204	typedef struct coro *Coro__State_or_hashref;
162		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
163	static AV *	223	static AV *
164	coro_clone_padlist (pTHX_ CV *cv)	224	coro_clone_padlist (pTHX_ CV *cv)
165	{	225	{
166	AV *padlist = CvPADLIST (cv);	226	AV *padlist = CvPADLIST (cv);
167	AV *newpadlist, *newpad;	227	AV *newpadlist, *newpad;
168		228
169	newpadlist = newAV ();	229	newpadlist = newAV ();
170	AvREAL_off (newpadlist);	230	AvREAL_off (newpadlist);
171	#if PERL_VERSION < 9	231	#if PERL_VERSION_ATLEAST (5,9,0)
		232	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		233	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	234	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173	#else
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#endif	235	#endif
176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	236	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177	--AvFILLp (padlist);	237	--AvFILLp (padlist);
178		238
179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	239	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
223		283
224	#define PERL_MAGIC_coro PERL_MAGIC_ext	284	#define PERL_MAGIC_coro PERL_MAGIC_ext
225		285
226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	286	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
227		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
228	/* the next two functions merely cache the padlists */	295	/* the next two functions merely cache the padlists */
229	static void	296	static void
230	get_padlist (pTHX_ CV *cv)	297	get_padlist (pTHX_ CV *cv)
231	{	298	{
232	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	299	MAGIC *mg = CORO_MAGIC (cv);
		300	AV *av;
233		301
234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	302	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
235	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	303	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236	else	304	else
237	{	305	{
238	#if 0	306	#if CORO_PREFER_PERL_FUNCTIONS
239	/* this should work - but it doesn't :( */	307	/* this is probably cleaner, but also slower? */
240	CV *cp = Perl_cv_clone (aTHX_ cv);	308	CV *cp = Perl_cv_clone (cv);
241	CvPADLIST (cv) = CvPADLIST (cp);	309	CvPADLIST (cv) = CvPADLIST (cp);
242	CvPADLIST (cp) = 0;	310	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (cp);	311	SvREFCNT_dec (cp);
244	#else	312	#else
245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	313	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
248	}	316	}
249		317
250	static void	318	static void
251	put_padlist (pTHX_ CV *cv)	319	put_padlist (pTHX_ CV *cv)
252	{	320	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	321	MAGIC *mg = CORO_MAGIC (cv);
		322	AV *av;
254		323
255	if (!mg)	324	if (!mg)
256	{	325	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	326	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	327	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	328	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	329	mg->mg_obj = (SV *)newAV ();
261	}	330	}
262		331
263	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);
264	}	338	}
		339
		340	/** load & save, init *******************************************************/
265		341
266	#define SB do {	342	#define SB do {
267	#define SE } while (0)	343	#define SE } while (0)
268		344
269	#define LOAD(state) load_state(aTHX_ (state));
270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
271
272	#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
273		346
274	static void	347	static void
275	load_state(pTHX_ Coro__State c)	348	load_perl (pTHX_ Coro__State c)
276	{	349	{
277	PL_dowarn = c->dowarn;	350	#define VAR(name,type) PL_ ## name = c->name;
278	PL_in_eval = c->in_eval;	351	# include "state.h"
279		352	#undef VAR
280	PL_curstackinfo = c->curstackinfo;
281	PL_curstack = c->curstack;
282	PL_mainstack = c->mainstack;
283	PL_stack_sp = c->stack_sp;
284	PL_op = c->op;
285	PL_curpad = c->curpad;
286	PL_comppad = c->comppad;
287	PL_compcv = c->compcv;
288	PL_stack_base = c->stack_base;
289	PL_stack_max = c->stack_max;
290	PL_tmps_stack = c->tmps_stack;
291	PL_tmps_floor = c->tmps_floor;
292	PL_tmps_ix = c->tmps_ix;
293	PL_tmps_max = c->tmps_max;
294	PL_markstack = c->markstack;
295	PL_markstack_ptr = c->markstack_ptr;
296	PL_markstack_max = c->markstack_max;
297	PL_scopestack = c->scopestack;
298	PL_scopestack_ix = c->scopestack_ix;
299	PL_scopestack_max = c->scopestack_max;
300	PL_savestack = c->savestack;
301	PL_savestack_ix = c->savestack_ix;
302	PL_savestack_max = c->savestack_max;
303	#if PERL_VERSION < 9
304	PL_retstack = c->retstack;
305	PL_retstack_ix = c->retstack_ix;
306	PL_retstack_max = c->retstack_max;
307	#endif
308	PL_curpm = c->curpm;
309	PL_curcop = c->curcop;
310		353
311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	354	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	355	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
313	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	}
314		373
315	{	374	{
316	dSP;	375	dSP;
317	CV *cv;	376	CV *cv;
318		377
319	/* now do the ugly restore mess */	378	/* now do the ugly restore mess */
320	while ((cv = (CV *)POPs))	379	while ((cv = (CV *)POPs))
321	{	380	{
322	AV *padlist = (AV *)POPs;
323
324	if (padlist)
325	{
326	put_padlist (aTHX_ cv); /* mark this padlist as available */	381	put_padlist (aTHX_ cv); /* mark this padlist as available */
327	CvPADLIST(cv) = padlist;	382	CvDEPTH (cv) = PTR2IV (POPs);
328	}	383	CvPADLIST (cv) = (AV *)POPs;
329
330	++CvDEPTH(cv);
331	}	384	}
332		385
333	PUTBACK;	386	PUTBACK;
334	}	387	}
335	}	388	}
336		389
337	static void	390	static void
338	save_state(pTHX_ Coro__State c, int flags)	391	save_perl (pTHX_ Coro__State c)
339	{	392	{
340	{	393	{
341	dSP;	394	dSP;
342	I32 cxix = cxstack_ix;	395	I32 cxix = cxstack_ix;
343	PERL_CONTEXT *ccstk = cxstack;	396	PERL_CONTEXT *ccstk = cxstack;
…		…
346	/*	399	/*
347	* 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
348	* (and reinitialize) all cv's in the whole callchain :(	401	* (and reinitialize) all cv's in the whole callchain :(
349	*/	402	*/
350		403
351	PUSHs (Nullsv);	404	XPUSHs (Nullsv);
352	/* this loop was inspired by pp_caller */	405	/* this loop was inspired by pp_caller */
353	for (;;)	406	for (;;)
354	{	407	{
355	while (cxix >= 0)	408	while (cxix >= 0)
356	{	409	{
357	PERL_CONTEXT *cx = &ccstk[cxix--];	410	PERL_CONTEXT *cx = &ccstk[cxix--];
358		411
359	if (CxTYPE(cx) == CXt_SUB)	412	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
360	{	413	{
361	CV *cv = cx->blk_sub.cv;	414	CV *cv = cx->blk_sub.cv;
		415
362	if (CvDEPTH(cv))	416	if (CvDEPTH (cv))
363	{	417	{
364	EXTEND (SP, CvDEPTH(cv)*2);	418	EXTEND (SP, 3);
365
366	while (--CvDEPTH(cv))
367	{
368	/* this tells the restore code to increment CvDEPTH */
369	PUSHs (Nullsv);
370	PUSHs ((SV *)cv);
371	}
372
373	PUSHs ((SV *)CvPADLIST(cv));	419	PUSHs ((SV *)CvPADLIST (cv));
		420	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
374	PUSHs ((SV *)cv);	421	PUSHs ((SV *)cv);
375		422
		423	CvDEPTH (cv) = 0;
376	get_padlist (aTHX_ cv);	424	get_padlist (aTHX_ cv);
377	}	425	}
378	}	426	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE(cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	427	}
388		428
389	if (top_si->si_type == PERLSI_MAIN)	429	if (top_si->si_type == PERLSI_MAIN)
390	break;	430	break;
391		431
392	top_si = top_si->si_prev;	432	top_si = top_si->si_prev;
393	ccstk = top_si->si_cxstack;	433	ccstk = top_si->si_cxstack;
394	cxix = top_si->si_cxix;	434	cxix = top_si->si_cxix;
395	}	435	}
396		436
397	PUTBACK;	437	PUTBACK;
398	}	438	}
399		439
400	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;
401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	441	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
402	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;
403		445
404	c->dowarn = PL_dowarn;	446	#define VAR(name,type)c->name = PL_ ## name;
405	c->in_eval = PL_in_eval;	447	# include "state.h"
406		448	#undef VAR
407	c->curstackinfo = PL_curstackinfo;
408	c->curstack = PL_curstack;
409	c->mainstack = PL_mainstack;
410	c->stack_sp = PL_stack_sp;
411	c->op = PL_op;
412	c->curpad = PL_curpad;
413	c->comppad = PL_comppad;
414	c->compcv = PL_compcv;
415	c->stack_base = PL_stack_base;
416	c->stack_max = PL_stack_max;
417	c->tmps_stack = PL_tmps_stack;
418	c->tmps_floor = PL_tmps_floor;
419	c->tmps_ix = PL_tmps_ix;
420	c->tmps_max = PL_tmps_max;
421	c->markstack = PL_markstack;
422	c->markstack_ptr = PL_markstack_ptr;
423	c->markstack_max = PL_markstack_max;
424	c->scopestack = PL_scopestack;
425	c->scopestack_ix = PL_scopestack_ix;
426	c->scopestack_max = PL_scopestack_max;
427	c->savestack = PL_savestack;
428	c->savestack_ix = PL_savestack_ix;
429	c->savestack_max = PL_savestack_max;
430	#if PERL_VERSION < 9
431	c->retstack = PL_retstack;
432	c->retstack_ix = PL_retstack_ix;
433	c->retstack_max = PL_retstack_max;
434	#endif
435	c->curpm = PL_curpm;
436	c->curcop = PL_curcop;
437	}	449	}
438		450
439	/*	451	/*
440	* allocate various perl stacks. This is an exact copy	452	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	453	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	454	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	455	* not usually need a lot of stackspace.
444	*/	456	*/
		457	#if CORO_PREFER_PERL_FUNCTIONS
		458	# define coro_init_stacks init_stacks
		459	#else
445	static void	460	static void
446	coro_init_stacks (pTHX)	461	coro_init_stacks (pTHX)
447	{	462	{
448	LOCK;	463	PL_curstackinfo = new_stackinfo(64, 6);
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		467
455	PL_stack_base = AvARRAY(PL_curstack);	468	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	469	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		471
459	New(50,PL_tmps_stack,96,SV*);	472	New(50,PL_tmps_stack,64,SV*);
460	PL_tmps_floor = -1;	473	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	474	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	475	PL_tmps_max = 64;
463		476
464	New(54,PL_markstack,16,I32);	477	New(54,PL_markstack,16,I32);
465	PL_markstack_ptr = PL_markstack;	478	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	479	PL_markstack_max = PL_markstack + 16;
467		480
…		…
471		484
472	New(54,PL_scopestack,16,I32);	485	New(54,PL_scopestack,16,I32);
473	PL_scopestack_ix = 0;	486	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	487	PL_scopestack_max = 16;
475		488
476	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	491	PL_savestack_max = 64;
479		492
480	#if PERL_VERSION < 9	493	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,4,OP*);
482	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	496	PL_retstack_max = 4;
484	#endif	497	#endif
485
486	UNLOCK;
487	}	498	}
		499	#endif
488		500
489	/*	501	/*
490	* destroy the stacks, the callchain etc...	502	* destroy the stacks, the callchain etc...
491	*/	503	*/
492	static void	504	static void
493	destroy_stacks(pTHX)	505	coro_destroy_stacks (pTHX)
494	{	506	{
495	if (!IN_DESTRUCT)	507	if (!IN_DESTRUCT)
496	{	508	{
497	/* is this ugly, I ask? */	509	/* restore all saved variables and stuff */
498	LEAVE_SCOPE (0);	510	LEAVE_SCOPE (0);
		511	assert (PL_tmps_floor == -1);
499		512
500	/* sure it is, but more important: is it correct?? :/ */	513	/* free all temporaries */
501	FREETMPS;	514	FREETMPS;
		515	assert (PL_tmps_ix == -1);
502		516
		517	/* unwind all extra stacks */
503	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	518	POPSTACK_TO (PL_mainstack);
		519
		520	/* unwind main stack */
		521	dounwind (-1);
504	}	522	}
505		523
506	while (PL_curstackinfo->si_next)	524	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	525	PL_curstackinfo = PL_curstackinfo->si_next;
508		526
509	while (PL_curstackinfo)	527	while (PL_curstackinfo)
510	{	528	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	529	PERL_SI *p = PL_curstackinfo->si_prev;
512		530
513	{ /*D*//*remove*/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	531	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	532	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		533
525	Safefree (PL_curstackinfo->si_cxstack);	534	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	535	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	536	PL_curstackinfo = p;
528	}	537	}
529		538
530	Safefree (PL_tmps_stack);	539	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	540	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	541	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	542	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	543	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	544	Safefree (PL_retstack);
536	#endif	545	#endif
537	}	546	}
538		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
539	static void	581	static void
540	setup_coro (struct coro *coro)	582	setup_coro (pTHX_ struct coro *coro)
541	{	583	{
542	/*	584	/*
543	* emulate part of the perl startup here.	585	* emulate part of the perl startup here.
544	*/	586	*/
545	dTHX;	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;
		596
		597	{
		598	dSP;
		599	LOGOP myop;
		600
		601	SvREFCNT_dec (GvAV (PL_defgv));
		602	GvAV (PL_defgv) = coro->args; coro->args = 0;
		603
		604	Zero (&myop, 1, LOGOP);
		605	myop.op_next = Nullop;
		606	myop.op_flags = OPf_WANT_VOID;
		607
		608	PUSHMARK (SP);
		609	XPUSHs (av_shift (GvAV (PL_defgv)));
		610	PUTBACK;
		611	PL_op = (OP *)&myop;
		612	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		613	SPAGAIN;
		614	}
		615
		616	ENTER; /* necessary e.g. for dounwind */
		617	}
		618
		619	static void
		620	free_coro_mortal (pTHX)
		621	{
		622	if (coro_mortal)
		623	{
		624	SvREFCNT_dec (coro_mortal);
		625	coro_mortal = 0;
		626	}
		627	}
		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 */
		632	static void NOINLINE
		633	prepare_cctx (pTHX_ coro_cctx *cctx)
		634	{
546	dSP;	635	dSP;
547	UNOP myop;	636	LOGOP myop;
548	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
549		637
550	coro_init_stacks (aTHX);
551	/*PL_curcop = 0;*/
552	/*PL_in_eval = PL_in_eval;*/ /* inherit */
553	SvREFCNT_dec (GvAV (PL_defgv));
554	GvAV (PL_defgv) = coro->args; coro->args = 0;
555
556	SPAGAIN;
557
558	Zero (&myop, 1, UNOP);	638	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	639	myop.op_next = PL_op;
560	myop.op_flags = OPf_WANT_VOID;	640	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561		641
		642	PUSHMARK (SP);
		643	EXTEND (SP, 2);
		644	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		645	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		646	PUTBACK;
562	PL_op = (OP *)&myop;	647	PL_op = (OP *)&myop;
563
564	PUSHMARK(SP);
565	XPUSHs (sub_init);
566	PUTBACK;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	649	SPAGAIN;
569
570	ENTER; /* necessary e.g. for dounwind */
571	}	650	}
572		651
573	static void	652	/*
574	free_coro_mortal ()	653	* this is a _very_ stripped down perl interpreter ;)
575	{	654	*/
576	if (coro_mortal)
577	{
578	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;
580	}
581	}
582
583	static void	655	static void
584	coro_run (void *arg)	656	coro_run (void *arg)
585	{	657	{
		658	dTHX;
		659
		660	/* coro_run is the alternative tail of transfer(), so unlock here. */
		661	UNLOCK;
		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
586	/*	672	/*
587	* 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
588	*/	678	*/
589	dTHX;
590
591	UNLOCK;
592
593	PL_top_env = &PL_start_env;	679	PL_top_env = main_top_env;
594		680	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
597
598	/* continue at cctx_init, without entersub */
599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601	/* somebody will hit me for both perl_run and PL_restart_op */
602	perl_run (aTHX_ PERL_GET_CONTEXT);
603
604	abort ();
605	}	681	}
606		682
607	static coro_stack *	683	static coro_cctx *
608	stack_new ()	684	cctx_new ()
609	{	685	{
610	coro_stack *stack;	686	coro_cctx *cctx;
		687	void *stack_start;
		688	size_t stack_size;
611		689
		690	++cctx_count;
		691
612	New (0, stack, 1, coro_stack);	692	Newz (0, cctx, 1, coro_cctx);
613		693
614	#if HAVE_MMAP	694	#if HAVE_MMAP
615		695
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	696	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		697	/* mmap supposedly does allocate-on-write for us */
617	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);
618		699
619	if (stack->sptr == (void *)-1)	700	if (cctx->sptr != (void *)-1)
		701	{
		702	# if CORO_STACKGUARD
		703	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		704	# endif
		705	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		706	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		707	cctx->mapped = 1;
620	{	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	{
621	perror ("FATAL: unable to mmap stack for coroutine");	717	perror ("FATAL: unable to allocate stack for coroutine");
622	_exit (EXIT_FAILURE);	718	_exit (EXIT_FAILURE);
623	}	719	}
624		720
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	721	stack_start = cctx->sptr;
626		722	stack_size = cctx->ssize;
627	#else
628
629	stack->ssize = STACKSIZE * (long)sizeof (long);
630	New (0, stack->sptr, STACKSIZE, long);
631
632	if (!stack->sptr)
633	{	723	}
634	perror (stderr, "FATAL: unable to malloc stack for coroutine");
635	_exit (EXIT_FAILURE);
636	}
637		724
638	#endif	725	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
639
640	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);
641		727
642	return stack;	728	return cctx;
643	}	729	}
644		730
645	static void	731	static void
646	stack_free (coro_stack *stack)	732	cctx_destroy (coro_cctx *cctx)
647	{	733	{
648	if (!stack || stack == main_stack)	734	if (!cctx)
649	return;	735	return;
650		736
		737	--cctx_count;
		738
		739	#if CORO_USE_VALGRIND
		740	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		741	#endif
		742
651	#if HAVE_MMAP	743	#if HAVE_MMAP
		744	if (cctx->mapped)
652	munmap (stack->sptr, stack->ssize);	745	munmap (cctx->sptr, cctx->ssize);
653	#else
654	Safefree (stack->sptr);
655	#endif
656
657	Safefree (stack);
658	}
659
660	static coro_stack *stack_first;
661
662	static coro_stack *
663	stack_get ()
664	{
665	coro_stack *stack;
666
667	if (stack_first)
668	{
669	stack = stack_first;
670	stack_first = stack->next;
671	}
672	else	746	else
		747	#endif
		748	Safefree (cctx->sptr);
		749
		750	Safefree (cctx);
		751	}
		752
		753	static coro_cctx *
		754	cctx_get (pTHX)
		755	{
		756	while (cctx_first)
673	{	757	{
674	stack = stack_new ();	758	coro_cctx *cctx = cctx_first;
		759	cctx_first = cctx->next;
		760	--cctx_idle;
		761
		762	if (cctx->ssize >= coro_stacksize)
		763	return cctx;
		764
		765	cctx_destroy (cctx);
		766	}
		767
675	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);
676	}	784	}
677		785
678	return stack;	786	++cctx_idle;
		787	cctx->next = cctx_first;
		788	cctx_first = cctx;
679	}	789	}
680		790
681	static void	791	/** coroutine switching *****************************************************/
682	stack_put (coro_stack *stack)
683	{
684	stack->next = stack_first;
685	stack_first = stack;
686	}
687		792
688	/* never call directly, always through the coro_state_transfer global variable */	793	/* never call directly, always through the coro_state_transfer global variable */
689	static void	794	static void NOINLINE
690	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	795	transfer (pTHX_ struct coro *prev, struct coro *next)
691	{	796	{
692	dSTACKLEVEL;	797	dSTACKLEVEL;
693		798
694	/* sometimes transfer is only called to set idle_sp */	799	/* sometimes transfer is only called to set idle_sp */
695	if (flags == TRANSFER_SET_STACKLEVEL)	800	if (!next)
		801	{
696	((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	}
697	else if (prev != next)	805	else if (prev != next)
698	{	806	{
699	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;
700		830
701	LOCK;	831	LOCK;
702		832
703	if (next->mainstack)	833	if (next->flags & CF_NEW)
704	{	834	{
705	/* coroutine already started */	835	/* need to start coroutine */
706	SAVE (prev, flags);	836	next->flags &= ~CF_NEW;
707	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);
708	}	843	}
709	else	844	else
710	{	845	{
711	/* need to start coroutine */	846	/* coroutine already started */
712	/* first get rid of the old state */	847	save_perl (aTHX_ prev);
713	SAVE (prev, -1);	848	load_perl (aTHX_ next);
714	/* setup coroutine call */
715	setup_coro (next);
716	/* need a stack */
717	next->stack = 0;
718	}	849	}
719		850
720	prev__stack = prev->stack;	851	prev__cctx = prev->cctx;
721		852
722	/* possibly "free" the stack */	853	/* possibly "free" the cctx */
723	if (prev__stack->idle_sp == STACKLEVEL)	854	if (prev__cctx->idle_sp == STACKLEVEL)
724	{	855	{
725	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
726	prev->stack = 0;	859	prev->cctx = 0;
		860
		861	cctx_put (prev__cctx);
		862	prev__cctx->inuse = 0;
727	}	863	}
728		864
729	if (!next->stack)	865	if (!next->cctx)
730	next->stack = stack_get ();
731
732	if (prev__stack != next->stack)
733	{	866	{
734	prev__stack->top_env = PL_top_env;	867	next->cctx = cctx_get (aTHX);
735	PL_top_env = next->stack->top_env;	868	assert (!next->cctx->inuse);
736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	869	next->cctx->inuse = 1;
737	}	870	}
738		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
739	free_coro_mortal ();	879	free_coro_mortal (aTHX);
740
741	UNLOCK;	880	UNLOCK;
742	}	881	}
743	}	882	}
744		883
745	/* use this function pointer to call the above function */
746	/* this is done to increase chances of the compiler not inlining the call */
747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
749
750	struct transfer_args	884	struct transfer_args
751	{	885	{
752	struct coro *prev, *next;	886	struct coro *prev, *next;
753	int flags;
754	};	887	};
755		888
756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	889	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
757		890
		891	/** high level stuff ********************************************************/
		892
758	static void	893	static int
759	coro_state_destroy (struct coro *coro)	894	coro_state_destroy (pTHX_ struct coro *coro)
760	{	895	{
761	if (coro->refcnt--)	896	if (coro->flags & CF_DESTROYED)
762	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 */
763		911
764	if (coro->mainstack && coro->mainstack != main_mainstack)	912	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	913	{
766	struct coro temp;	914	struct coro temp;
767		915
768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	916	assert (!(coro->flags & CF_RUNNING));
		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);
769	LOAD (aTHX_ coro);	925	load_perl (aTHX_ coro);
770		926
771	destroy_stacks (aTHX);	927	coro_destroy_stacks (aTHX);
772		928
773	LOAD ((&temp)); /* this will get rid of defsv etc.. */	929	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
774		930
775	coro->mainstack = 0;	931	coro->mainstack = 0;
776	}	932	}
777		933
778	stack_free (coro->stack);	934	cctx_destroy (coro->cctx);
779	SvREFCNT_dec (coro->args);	935	SvREFCNT_dec (coro->args);
780	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;
781	}	942	}
782		943
783	static int	944	static int
784	coro_state_clear (SV *sv, MAGIC *mg)	945	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
785	{	946	{
786	struct coro *coro = (struct coro *)mg->mg_ptr;	947	struct coro *coro = (struct coro *)mg->mg_ptr;
787	mg->mg_ptr = 0;	948	mg->mg_ptr = 0;
788		949
		950	coro->hv = 0;
		951
		952	if (--coro->refcnt < 0)
		953	{
789	coro_state_destroy (coro);	954	coro_state_destroy (aTHX_ coro);
		955	Safefree (coro);
		956	}
790		957
791	return 0;	958	return 0;
792	}	959	}
793		960
794	static int	961	static int
795	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	962	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
796	{	963	{
797	struct coro *coro = (struct coro *)mg->mg_ptr;	964	struct coro *coro = (struct coro *)mg->mg_ptr;
798		965
799	++coro->refcnt;	966	++coro->refcnt;
800		967
801	return 0;	968	return 0;
802	}	969	}
803		970
804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	971	static MGVTBL coro_state_vtbl = {
		972	0, 0, 0, 0,
		973	coro_state_free,
		974	0,
		975	#ifdef MGf_DUP
		976	coro_state_dup,
		977	#else
		978	# define MGf_DUP 0
		979	#endif
		980	};
805		981
806	static struct coro *	982	static struct coro *
807	SvSTATE (SV *coro)	983	SvSTATE_ (pTHX_ SV *coro)
808	{	984	{
809	HV *stash;	985	HV *stash;
810	MAGIC *mg;	986	MAGIC *mg;
811		987
812	if (SvROK (coro))	988	if (SvROK (coro))
…		…
818	/* very slow, but rare, check */	994	/* very slow, but rare, check */
819	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	995	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
820	croak ("Coro::State object required");	996	croak ("Coro::State object required");
821	}	997	}
822		998
823	mg = SvMAGIC (coro);	999	mg = CORO_MAGIC (coro);
824	assert (mg->mg_type == PERL_MAGIC_ext);
825	return (struct coro *)mg->mg_ptr;	1000	return (struct coro *)mg->mg_ptr;
826	}	1001	}
827		1002
		1003	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1004
828	static void	1005	static void
829	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1006	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
830	{	1007	{
831	ta->prev = SvSTATE (prev);	1008	ta->prev = SvSTATE (prev_sv);
832	ta->next = SvSTATE (next);	1009	ta->next = SvSTATE (next_sv);
833	ta->flags = flags;
834	}	1010	}
835		1011
836	static void	1012	static void
837	api_transfer (SV *prev, SV *next, int flags)	1013	api_transfer (SV *prev_sv, SV *next_sv)
838	{	1014	{
839	dTHX;	1015	dTHX;
840	struct transfer_args ta;	1016	struct transfer_args ta;
841		1017
842	prepare_transfer (aTHX_ &ta, prev, next, flags);	1018	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
843	TRANSFER (ta);	1019	TRANSFER (ta);
844	}	1020	}
845		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
846	/** Coro ********************************************************************/	1035	/** Coro ********************************************************************/
847		1036
848	#define PRIO_MAX 3
849	#define PRIO_HIGH 1
850	#define PRIO_NORMAL 0
851	#define PRIO_LOW -1
852	#define PRIO_IDLE -3
853	#define PRIO_MIN -4
854
855	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;
857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;
859
860	static void	1037	static void
861	coro_enq (pTHX_ SV *sv)	1038	coro_enq (pTHX_ SV *coro_sv)
862	{	1039	{
863	int prio;
864
865	if (SvTYPE (sv) != SVt_PVHV)
866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868	prio = SvSTATE (sv)->prio;
869
870	av_push (coro_ready [prio - PRIO_MIN], sv);	1040	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
871	coro_nready++;
872	}	1041	}
873		1042
874	static SV *	1043	static SV *
875	coro_deq (pTHX_ int min_prio)	1044	coro_deq (pTHX_ int min_prio)
876	{	1045	{
…		…
880	if (min_prio < 0)	1049	if (min_prio < 0)
881	min_prio = 0;	1050	min_prio = 0;
882		1051
883	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1052	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
884	if (AvFILLp (coro_ready [prio]) >= 0)	1053	if (AvFILLp (coro_ready [prio]) >= 0)
885	{
886	coro_nready--;
887	return av_shift (coro_ready [prio]);	1054	return av_shift (coro_ready [prio]);
888	}
889		1055
890	return 0;	1056	return 0;
891	}	1057	}
892		1058
893	static void	1059	static int
894	api_ready (SV *coro)	1060	api_ready (SV *coro_sv)
895	{	1061	{
896	dTHX;	1062	dTHX;
		1063	struct coro *coro;
897		1064
898	if (SvROK (coro))	1065	if (SvROK (coro_sv))
899	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;
900		1074
901	LOCK;	1075	LOCK;
902	coro_enq (aTHX_ SvREFCNT_inc (coro));	1076	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1077	++coro_nready;
903	UNLOCK;	1078	UNLOCK;
904	}
905		1079
		1080	return 1;
		1081	}
		1082
906	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
907	prepare_schedule (aTHX_ struct transfer_args *ta)	1091	prepare_schedule (pTHX_ struct transfer_args *ta)
908	{	1092	{
909	SV *current, *prev, *next;	1093	SV *prev_sv, *next_sv;
		1094
		1095	for (;;)
		1096	{
		1097	LOCK;
		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;
		1130	UNLOCK;
		1131	break;
		1132	}
		1133
		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;
910		1141
911	LOCK;	1142	LOCK;
912
913	current = GvSV (coro_current);
914
915	for (;;)
916	{
917	LOCK;
918
919	next = coro_deq (aTHX_ PRIO_MIN);
920
921	if (next)
922	break;
923
924	UNLOCK;
925
926	{
927	dSP;
928
929	ENTER;
930	SAVETMPS;
931
932	PUSHMARK (SP);
933	PUTBACK;
934	call_sv (GvSV (coro_idle), G_DISCARD);
935
936	FREETMPS;
937	LEAVE;
938	}
939	}
940
941	prev = SvRV (current);
942	SvRV (current) = next;
943
944	/* free this only after the transfer */
945	free_coro_mortal ();	1143	free_coro_mortal (aTHX);
946	coro_mortal = prev;	1144	coro_mortal = prev_sv;
947
948	ta->prev = SvSTATE (prev);
949	ta->next = SvSTATE (next);
950	ta->flags = TRANSFER_SAVE_ALL;
951
952	UNLOCK;	1145	UNLOCK;
953	}	1146	}
954		1147
955	static void	1148	static void
956	prepare_cede (aTHX_ struct transfer_args *ta)	1149	prepare_cede (pTHX_ struct transfer_args *ta)
957	{	1150	{
958	LOCK;	1151	api_ready (coro_current);
959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960	UNLOCK;
961
962	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;
963	}	1167	}
964		1168
965	static void	1169	static void
966	api_schedule (void)	1170	api_schedule (void)
967	{	1171	{
968	dTHX;	1172	dTHX;
969	struct transfer_args ta;	1173	struct transfer_args ta;
970		1174
971	prepare_schedule (&ta);	1175	prepare_schedule (aTHX_ &ta);
972	TRANSFER (ta);	1176	TRANSFER (ta);
973	}	1177	}
974		1178
975	static void	1179	static int
976	api_cede (void)	1180	api_cede (void)
977	{	1181	{
978	dTHX;	1182	dTHX;
979	struct transfer_args ta;	1183	struct transfer_args ta;
980		1184
981	prepare_cede (&ta);	1185	prepare_cede (aTHX_ &ta);
		1186
		1187	if (ta.prev != ta.next)
		1188	{
982	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;
983	}	1209	}
984		1210
985	MODULE = Coro::State PACKAGE = Coro::State	1211	MODULE = Coro::State PACKAGE = Coro::State
986		1212
987	PROTOTYPES: DISABLE	1213	PROTOTYPES: DISABLE
…		…
993	#endif	1219	#endif
994	BOOT_PAGESIZE;	1220	BOOT_PAGESIZE;
995		1221
996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1222	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997		1223
998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1000	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));
1001		1231
1002	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;
1003		1237
1004	coroapi.ver = CORO_API_VERSION;	1238	coroapi.ver = CORO_API_VERSION;
1005	coroapi.transfer = api_transfer;	1239	coroapi.transfer = api_transfer;
1006
1007	Newz (0, main_stack, 1, coro_stack);
1008	main_stack->idle_sp = (void *)-1;
1009		1240
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1241	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011	}	1242	}
1012		1243
1013	SV *	1244	SV *
…		…
1018	HV *hv;	1249	HV *hv;
1019	int i;	1250	int i;
1020		1251
1021	Newz (0, coro, 1, struct coro);	1252	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1253	coro->args = newAV ();
		1254	coro->save = CORO_SAVE_DEF;
		1255	coro->flags = CF_NEW;
1023		1256
		1257	if (coro_first) coro_first->prev = coro;
		1258	coro->next = coro_first;
		1259	coro_first = coro;
		1260
1024	hv = newHV ();	1261	coro->hv = hv = newHV ();
1025	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;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1263	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1264
1028	for (i = 1; i < items; i++)	1265	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1266	av_push (coro->args, newSVsv (ST (i)));
1030
1031	coro->stack = main_stack;
1032	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1033	/*coro->stack = 0;*/
1034	}	1267	}
1035	OUTPUT:	1268	OUTPUT:
1036	RETVAL	1269	RETVAL
1037		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:
		1287	RETVAL
		1288
1038	void	1289	void
1039	transfer (...)	1290	_set_stacklevel (...)
1040	ALIAS:	1291	ALIAS:
1041	Coro::schedule = 1	1292	Coro::State::transfer = 1
1042	Coro::cede = 2	1293	Coro::schedule = 2
1043	_set_stacklevel = 3	1294	Coro::cede = 3
		1295	Coro::cede_notself = 4
1044	CODE:	1296	CODE:
1045	{	1297	{
1046	struct transfer_args ta;	1298	struct transfer_args ta;
1047		1299
1048	switch (ix)	1300	switch (ix)
1049	{	1301	{
1050	case 0:	1302	case 0:
1051	if (items != 3)	1303	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1304	ta.next = 0;
1053
1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055	break;	1305	break;
1056		1306
1057	case 1:	1307	case 1:
1058	prepare_schedule (&ta);	1308	if (items != 2)
		1309	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1310
		1311	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1059	break;	1312	break;
1060		1313
1061	case 2:	1314	case 2:
1062	prepare_cede (&ta);	1315	prepare_schedule (aTHX_ &ta);
1063	break;	1316	break;
1064		1317
1065	case 3:	1318	case 3:
1066	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1319	prepare_cede (aTHX_ &ta);
1067	ta.next = 0;	1320	break;
1068	ta.flags = TRANSFER_SET_STACKLEVEL;	1321
		1322	case 4:
		1323	if (!prepare_cede_notself (aTHX_ &ta))
		1324	XSRETURN_EMPTY;
		1325
1069	break;	1326	break;
1070	}	1327	}
1071		1328
		1329	BARRIER;
1072	TRANSFER (ta);	1330	TRANSFER (ta);
1073	}
1074		1331
1075	void	1332	if (GIMME_V != G_VOID && ta.next != ta.prev)
1076	_clone_state_from (SV *dst, SV *src)	1333	XSRETURN_YES;
		1334	}
		1335
		1336	bool
		1337	_destroy (SV *coro_sv)
1077	CODE:	1338	CODE:
1078	{	1339	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1079	struct coro *coro_src = SvSTATE (src);	1340	OUTPUT:
1080		1341	RETVAL
1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082
1083	++coro_src->refcnt;
1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1085	}
1086
1087	void
1088	_nonlocal_goto (IV nextop)
1089	CODE:
1090	/* uuh, somebody will kill me again for this */
1091	PL_op->op_next = INT2PTR (OP *, nextop);
1092		1342
1093	void	1343	void
1094	_exit (code)	1344	_exit (code)
1095	int code	1345	int code
1096	PROTOTYPE: $	1346	PROTOTYPE: $
1097	CODE:	1347	CODE:
1098	_exit (code);	1348	_exit (code);
1099		1349
1100	MODULE = Coro::State PACKAGE = Coro::Cont	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
1101		1372
1102	void	1373	void
1103	yield (...)	1374	list ()
1104	PROTOTYPE: @	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	_eval (Coro::State coro, SV *coderef)
		1385	CODE:
		1386	{
		1387	if (coro->mainstack)
		1388	{
		1389	struct coro temp;
		1390	Zero (&temp, 1, struct coro);
		1391	temp.save = CORO_SAVE_ALL;
		1392
		1393	if (!(coro->flags & CF_RUNNING))
		1394	{
		1395	save_perl (aTHX_ &temp);
		1396	load_perl (aTHX_ coro);
		1397	}
		1398
		1399	{
		1400	dSP;
		1401	ENTER;
		1402	SAVETMPS;
		1403	PUSHMARK (SP);
		1404	PUTBACK;
		1405	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1406	SPAGAIN;
		1407	FREETMPS;
		1408	LEAVE;
		1409	PUTBACK;
		1410	}
		1411
		1412	if (!(coro->flags & CF_RUNNING))
		1413	{
		1414	save_perl (aTHX_ coro);
		1415	load_perl (aTHX_ &temp);
		1416	}
		1417	}
		1418	}
		1419
		1420	SV *
		1421	is_ready (Coro::State coro)
		1422	PROTOTYPE: $
		1423	ALIAS:
		1424	is_ready = CF_READY
		1425	is_running = CF_RUNNING
		1426	is_new = CF_NEW
		1427	is_destroyed = CF_DESTROYED
		1428	CODE:
		1429	RETVAL = boolSV (coro->flags & ix);
		1430	OUTPUT:
		1431	RETVAL
		1432
		1433	SV *
		1434	has_stack (Coro::State coro)
		1435	PROTOTYPE: $
		1436	CODE:
		1437	RETVAL = boolSV (!!coro->cctx);
		1438	OUTPUT:
		1439	RETVAL
		1440
		1441	IV
		1442	rss (Coro::State coro)
		1443	PROTOTYPE: $
1105	CODE:	1444	CODE:
1106	{	1445	RETVAL = coro_rss (coro);
1107	SV *yieldstack;	1446	OUTPUT:
1108	SV *sv;	1447	RETVAL
1109	AV *defav = GvAV (PL_defgv);
1110	struct coro *prev, *next;
1111		1448
1112	yieldstack = *hv_fetch (
1113	(HV *)SvRV (GvSV (coro_current)),
1114	"yieldstack", sizeof ("yieldstack") - 1,
1115	0
1116	);
1117
1118	/* set up @_ -- ugly */
1119	av_clear (defav);
1120	av_fill (defav, items - 1);
1121	while (items--)
1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124	sv = av_pop ((AV *)SvRV (yieldstack));
1125	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1126	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1127	SvREFCNT_dec (sv);
1128
1129	coro_state_transfer (aTHX_ prev, next, 0);
1130	}
1131		1449
1132	MODULE = Coro::State PACKAGE = Coro	1450	MODULE = Coro::State PACKAGE = Coro
1133		1451
1134	BOOT:	1452	BOOT:
1135	{	1453	{
1136	int i;	1454	int i;
		1455
		1456	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1457	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1458	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1459
		1460	coro_current = get_sv ("Coro::current", FALSE);
		1461	SvREADONLY_on (coro_current);
1137		1462
1138	coro_stash = gv_stashpv ("Coro", TRUE);	1463	coro_stash = gv_stashpv ("Coro", TRUE);
1139		1464
1140	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1465	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1141	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1466	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1467	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1468	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1469	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1470	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146		1471
1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1149
1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1472	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151	coro_ready[i] = newAV ();	1473	coro_ready[i] = newAV ();
1152		1474
1153	{	1475	{
1154	SV *sv = perl_get_sv("Coro::API", 1);	1476	SV *sv = perl_get_sv("Coro::API", 1);
1155		1477
1156	coroapi.schedule = api_schedule;	1478	coroapi.schedule = api_schedule;
		1479	coroapi.save = api_save;
1157	coroapi.cede = api_cede;	1480	coroapi.cede = api_cede;
		1481	coroapi.cede_notself = api_cede_notself;
1158	coroapi.ready = api_ready;	1482	coroapi.ready = api_ready;
		1483	coroapi.is_ready = api_is_ready;
1159	coroapi.nready = &coro_nready;	1484	coroapi.nready = &coro_nready;
1160	coroapi.current = coro_current;	1485	coroapi.current = coro_current;
1161		1486
1162	GCoroAPI = &coroapi;	1487	GCoroAPI = &coroapi;
1163	sv_setiv (sv, (IV)&coroapi);	1488	sv_setiv (sv, (IV)&coroapi);
1164	SvREADONLY_on (sv);	1489	SvREADONLY_on (sv);
1165	}	1490	}
1166	}	1491	}
		1492
		1493	void
		1494	_set_current (SV *current)
		1495	PROTOTYPE: $
		1496	CODE:
		1497	SvREFCNT_dec (SvRV (coro_current));
		1498	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1167		1499
1168	int	1500	int
1169	prio (Coro::State coro, int newprio = 0)	1501	prio (Coro::State coro, int newprio = 0)
1170	ALIAS:	1502	ALIAS:
1171	nice = 1	1503	nice = 1
…		…
1174	RETVAL = coro->prio;	1506	RETVAL = coro->prio;
1175		1507
1176	if (items > 1)	1508	if (items > 1)
1177	{	1509	{
1178	if (ix)	1510	if (ix)
1179	newprio += coro->prio;	1511	newprio = coro->prio - newprio;
1180		1512
1181	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1513	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1182	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1514	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1183		1515
1184	coro->prio = newprio;	1516	coro->prio = newprio;
1185	}	1517	}
1186	}	1518	}
		1519	OUTPUT:
		1520	RETVAL
1187		1521
1188	void	1522	SV *
1189	ready (SV *self)	1523	ready (SV *self)
1190	PROTOTYPE: $	1524	PROTOTYPE: $
1191	CODE:	1525	CODE:
1192	api_ready (self);	1526	RETVAL = boolSV (api_ready (self));
		1527	OUTPUT:
		1528	RETVAL
1193		1529
1194	int	1530	int
1195	nready (...)	1531	nready (...)
1196	PROTOTYPE:	1532	PROTOTYPE:
1197	CODE:	1533	CODE:
1198	RETVAL = coro_nready;	1534	RETVAL = coro_nready;
1199	OUTPUT:	1535	OUTPUT:
1200	RETVAL	1536	RETVAL
1201		1537
		1538	# for async_pool speedup
		1539	void
		1540	_pool_1 (SV *cb)
		1541	CODE:
		1542	{
		1543	int i, len;
		1544	HV *hv = (HV *)SvRV (coro_current);
		1545	AV *defav = GvAV (PL_defgv);
		1546	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1547	AV *invoke_av;
		1548
		1549	if (!invoke)
		1550	croak ("\3terminate\2\n");
		1551
		1552	hv_store (hv, "desc", sizeof ("desc") - 1,
		1553	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1554
		1555	invoke_av = (AV *)SvRV (invoke);
		1556	len = av_len (invoke_av);
		1557
		1558	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1559
		1560	if (len > 0)
		1561	{
		1562	av_fill (defav, len - 1);
		1563	for (i = 0; i < len; ++i)
		1564	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1565	}
		1566
		1567	SvREFCNT_dec (invoke);
		1568	}
		1569
		1570	void
		1571	_pool_2 (SV *cb)
		1572	CODE:
		1573	{
		1574	struct coro *coro = SvSTATE (coro_current);
		1575
		1576	sv_setsv (cb, &PL_sv_undef);
		1577
		1578	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1579	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1580	croak ("\3terminate\2\n");
		1581
		1582	av_clear (GvAV (PL_defgv));
		1583	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1584	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1585	coro->save = CORO_SAVE_DEF;
		1586	coro->prio = 0;
		1587	av_push (av_async_pool, newSVsv (coro_current));
		1588	}
		1589
		1590
1202	MODULE = Coro::State PACKAGE = Coro::AIO	1591	MODULE = Coro::State PACKAGE = Coro::AIO
1203		1592
1204	SV *	1593	SV *
1205	_get_state ()	1594	_get_state ()
1206	CODE:	1595	CODE:
1207	{	1596	{
1208	struct {	1597	struct io_state *data;
1209	int errorno;
1210	int laststype;
1211	int laststatval;
1212	Stat_t statcache;
1213	} data;
1214		1598
		1599	RETVAL = newSV (sizeof (struct io_state));
		1600	data = (struct io_state *)SvPVX (RETVAL);
		1601	SvCUR_set (RETVAL, sizeof (struct io_state));
		1602	SvPOK_only (RETVAL);
		1603
1215	data.errorno = errno;	1604	data->errorno = errno;
1216	data.laststype = PL_laststype;	1605	data->laststype = PL_laststype;
1217	data.laststatval = PL_laststatval;	1606	data->laststatval = PL_laststatval;
1218	data.statcache = PL_statcache;	1607	data->statcache = PL_statcache;
1219
1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
1221	}	1608	}
1222	OUTPUT:	1609	OUTPUT:
1223	RETVAL	1610	RETVAL
1224		1611
1225	void	1612	void
1226	_set_state (char *data_)	1613	_set_state (char *data_)
1227	PROTOTYPE: $	1614	PROTOTYPE: $
1228	CODE:	1615	CODE:
1229	{	1616	{
1230	struct {	1617	struct io_state *data = (void *)data_;
1231	int errorno;
1232	int laststype;
1233	int laststatval;
1234	Stat_t statcache;
1235	} *data = (void *)data_;
1236		1618
1237	errno = data->errorno;	1619	errno = data->errorno;
1238	PL_laststype = data->laststype;	1620	PL_laststype = data->laststype;
1239	PL_laststatval = data->laststatval;	1621	PL_laststatval = data->laststatval;
1240	PL_statcache = data->statcache;	1622	PL_statcache = data->statcache;
1241	}	1623	}
		1624

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