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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs.
Revision 1.164 by root, Tue Sep 25 01:47:23 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
63		92
64	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	94	* portable way as possible. */
66	* and should be unique. */	95	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &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		111
75	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
79	#else	116	#else
80	# define LOCK (void)0	117	# define LOCK (void)0
81	# define UNLOCK (void)0	118	# define UNLOCK (void)0
82	#endif	119	#endif
83		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;
84	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
85	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;
86	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
88		136
89	/* this is actually not just the c stack but also c registers etc... */	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
		145	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	146	typedef struct coro_cctx {
91	struct coro_stack *next;	147	struct coro_cctx *next;
92		148
93	void *idle_sp;	149	/* the stack */
94	void *sptr;	150	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	151	size_t ssize;
96		152
97	/* cpu state */	153	/* cpu state */
		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 */
		156	JMPENV *top_env;
98	coro_context cctx;	157	coro_context cctx;
99	} coro_stack;
100		158
101	static coro_stack *main_stack;	159	#if CORO_USE_VALGRIND
		160	int valgrind_id;
		161	#endif
		162	char inuse, mapped;
		163	} coro_cctx;
102		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	};
		171
		172	/* this is a structure representing a perl-level coroutine */
103	struct coro {	173	struct coro {
104	/* optionally saved, might be zero */	174	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	175	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		176
150	/* data associated with this coroutine (initial args) */	177	/* data associated with this coroutine (initial args) */
151	AV *args;	178	AV *args;
152	int refcnt;	179	int refcnt;
		180	int save; /* CORO_SAVE flags */
		181	int flags; /* CF_ flags */
		182
		183	/* optionally saved, might be zero */
		184	AV *defav; /* @_ */
		185	SV *defsv; /* $_ */
		186	SV *errsv; /* $@ */
		187	GV *deffh; /* default filehandle */
		188	SV *irssv; /* $/ */
		189	SV *irssv_sv; /* real $/ cache */
		190
		191	#define VAR(name,type) type name;
		192	# include "state.h"
		193	#undef VAR
		194
		195	/* coro process data */
		196	int prio;
		197
		198	/* linked list */
		199	struct coro *next, *prev;
		200	HV *hv; /* the perl hash associated with this coro, if any */
153	};	201	};
154		202
155	typedef struct coro *Coro__State;	203	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	204	typedef struct coro *Coro__State_or_hashref;
157		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
158	static AV *	223	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	224	coro_clone_padlist (pTHX_ CV *cv)
160	{	225	{
161	AV *padlist = CvPADLIST (cv);	226	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	227	AV *newpadlist, *newpad;
163		228
164	newpadlist = newAV ();	229	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	230	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	231	#if PERL_VERSION_ATLEAST (5,9,0)
		232	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		233	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	234	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	235	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	236	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	237	--AvFILLp (padlist);
173		238
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	239	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		283
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	284	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		285
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	286	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		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
223	/* the next two functions merely cache the padlists */	295	/* the next two functions merely cache the padlists */
224	static void	296	static void
225	get_padlist (pTHX_ CV *cv)	297	get_padlist (pTHX_ CV *cv)
226	{	298	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	299	MAGIC *mg = CORO_MAGIC (cv);
		300	AV *av;
228		301
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	302	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	303	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	304	else
232	{	305	{
233	#if 0	306	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	307	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	308	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	309	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	310	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	311	SvREFCNT_dec (cp);
239	#else	312	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	313	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	316	}
244		317
245	static void	318	static void
246	put_padlist (pTHX_ CV *cv)	319	put_padlist (pTHX_ CV *cv)
247	{	320	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	321	MAGIC *mg = CORO_MAGIC (cv);
		322	AV *av;
249		323
250	if (!mg)	324	if (!mg)
251	{	325	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	326	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	327	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	328	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	329	mg->mg_obj = (SV *)newAV ();
256	}	330	}
257		331
258	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);
259	}	338	}
		339
		340	/** load & save, init *******************************************************/
260		341
261	#define SB do {	342	#define SB do {
262	#define SE } while (0)	343	#define SE } while (0)
263		344
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	345	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		346
269	static void	347	static void
270	load_state(pTHX_ Coro__State c)	348	load_perl (pTHX_ Coro__State c)
271	{	349	{
272	PL_dowarn = c->dowarn;	350	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	351	# include "state.h"
274		352	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		353
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	354	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	355	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	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	}
310		373
311	{	374	{
312	dSP;	375	dSP;
313	CV *cv;	376	CV *cv;
314		377
315	/* now do the ugly restore mess */	378	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	379	while ((cv = (CV *)POPs))
317	{	380	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	381	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	382	CvDEPTH (cv) = PTR2IV (POPs);
324	}	383	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	384	}
328		385
329	PUTBACK;	386	PUTBACK;
330	}	387	}
331	}	388	}
332		389
333	static void	390	static void
334	save_state(pTHX_ Coro__State c, int flags)	391	save_perl (pTHX_ Coro__State c)
335	{	392	{
336	{	393	{
337	dSP;	394	dSP;
338	I32 cxix = cxstack_ix;	395	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	396	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	399	/*
343	* 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
344	* (and reinitialize) all cv's in the whole callchain :(	401	* (and reinitialize) all cv's in the whole callchain :(
345	*/	402	*/
346		403
347	PUSHs (Nullsv);	404	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	405	/* this loop was inspired by pp_caller */
349	for (;;)	406	for (;;)
350	{	407	{
351	while (cxix >= 0)	408	while (cxix >= 0)
352	{	409	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	410	PERL_CONTEXT *cx = &ccstk[cxix--];
354		411
355	if (CxTYPE(cx) == CXt_SUB)	412	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
356	{	413	{
357	CV *cv = cx->blk_sub.cv;	414	CV *cv = cx->blk_sub.cv;
		415
358	if (CvDEPTH(cv))	416	if (CvDEPTH (cv))
359	{	417	{
360	EXTEND (SP, CvDEPTH(cv)*2);	418	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	419	PUSHs ((SV *)CvPADLIST (cv));
		420	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	421	PUSHs ((SV *)cv);
371		422
		423	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	424	get_padlist (aTHX_ cv);
373	}	425	}
374	}	426	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	427	}
384		428
385	if (top_si->si_type == PERLSI_MAIN)	429	if (top_si->si_type == PERLSI_MAIN)
386	break;	430	break;
387		431
388	top_si = top_si->si_prev;	432	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	433	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	434	cxix = top_si->si_cxix;
391	}	435	}
392		436
393	PUTBACK;	437	PUTBACK;
394	}	438	}
395		439
396	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;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	441	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	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;
399		445
400	c->dowarn = PL_dowarn;	446	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	447	# include "state.h"
402		448	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	449	}
435		450
436	/*	451	/*
437	* allocate various perl stacks. This is an exact copy	452	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	453	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	454	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	455	* not usually need a lot of stackspace.
441	*/	456	*/
		457	#if CORO_PREFER_PERL_FUNCTIONS
		458	# define coro_init_stacks init_stacks
		459	#else
442	static void	460	static void
443	coro_init_stacks (pTHX)	461	coro_init_stacks (pTHX)
444	{	462	{
445	LOCK;	463	PL_curstackinfo = new_stackinfo(64, 6);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		467
452	PL_stack_base = AvARRAY(PL_curstack);	468	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	469	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		471
456	New(50,PL_tmps_stack,96,SV*);	472	New(50,PL_tmps_stack,64,SV*);
457	PL_tmps_floor = -1;	473	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	474	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	475	PL_tmps_max = 64;
460		476
461	New(54,PL_markstack,16,I32);	477	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	478	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	479	PL_markstack_max = PL_markstack + 16;
464		480
…		…
468		484
469	New(54,PL_scopestack,16,I32);	485	New(54,PL_scopestack,16,I32);
470	PL_scopestack_ix = 0;	486	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	487	PL_scopestack_max = 16;
472		488
473	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	491	PL_savestack_max = 64;
476		492
477	#if PERL_VERSION < 9	493	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	496	PL_retstack_max = 4;
481	#endif	497	#endif
482
483	UNLOCK;
484	}	498	}
		499	#endif
485		500
486	/*	501	/*
487	* destroy the stacks, the callchain etc...	502	* destroy the stacks, the callchain etc...
488	*/	503	*/
489	static void	504	static void
490	destroy_stacks(pTHX)	505	coro_destroy_stacks (pTHX)
491	{	506	{
492	if (!IN_DESTRUCT)	507	if (!IN_DESTRUCT)
493	{	508	{
494	/* is this ugly, I ask? */	509	/* restore all saved variables and stuff */
495	LEAVE_SCOPE (0);	510	LEAVE_SCOPE (0);
		511	assert (PL_tmps_floor == -1);
496		512
497	/* sure it is, but more important: is it correct?? :/ */	513	/* free all temporaries */
498	FREETMPS;	514	FREETMPS;
		515	assert (PL_tmps_ix == -1);
499		516
		517	/* unwind all extra stacks */
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	518	POPSTACK_TO (PL_mainstack);
		519
		520	/* unwind main stack */
		521	dounwind (-1);
501	}	522	}
502		523
503	while (PL_curstackinfo->si_next)	524	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	525	PL_curstackinfo = PL_curstackinfo->si_next;
505		526
506	while (PL_curstackinfo)	527	while (PL_curstackinfo)
507	{	528	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	529	PERL_SI *p = PL_curstackinfo->si_prev;
509		530
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	531	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	532	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		533
522	Safefree (PL_curstackinfo->si_cxstack);	534	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	535	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	536	PL_curstackinfo = p;
525	}	537	}
526		538
527	Safefree (PL_tmps_stack);	539	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	540	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	541	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	542	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	543	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	544	Safefree (PL_retstack);
533	#endif	545	#endif
534	}	546	}
535		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
536	static void	581	static void
537	setup_coro (struct coro *coro)	582	setup_coro (pTHX_ struct coro *coro)
538	{	583	{
539	/*	584	/*
540	* emulate part of the perl startup here.	585	* emulate part of the perl startup here.
541	*/	586	*/
542	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	{
543	dSP;	635	dSP;
544	UNOP myop;	636	LOGOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		637
547	coro_init_stacks (aTHX);
548	/*PL_curcop = 0;*/
549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552
553	SPAGAIN;
554
555	Zero (&myop, 1, UNOP);	638	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	639	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	640	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		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;
559	PL_op = (OP *)&myop;	647	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	649	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	650	}
569		651
		652	/*
		653	* this is a _very_ stripped down perl interpreter ;)
		654	*/
570	static void	655	static void
571	transfer_tail ()	656	coro_run (void *arg)
572	{	657	{
573	if (coro_mortal)	658	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		659
		660	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	661	UNLOCK;
580	}
581		662
582	static void	663	PL_top_env = &PL_start_env;
583	coro_run (void *arg)	664
584	{	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
585	/*	672	/*
586	* 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
587	*/	678	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	679	PL_top_env = main_top_env;
593	PL_restartop = PL_op->op_next;	680	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	/* somebody will hit me for both perl_run and PL_restart_top */
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}	681	}
599		682
600	static coro_stack *	683	static coro_cctx *
601	stack_new ()	684	cctx_new ()
602	{	685	{
603	coro_stack *stack;	686	coro_cctx *cctx;
		687	void *stack_start;
		688	size_t stack_size;
604		689
		690	++cctx_count;
		691
605	New (0, stack, 1, coro_stack);	692	Newz (0, cctx, 1, coro_cctx);
606		693
607	#if HAVE_MMAP	694	#if HAVE_MMAP
608		695
609	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 */
610	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);
611		699
612	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;
613	{	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	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	717	perror ("FATAL: unable to allocate stack for coroutine");
615	_exit (EXIT_FAILURE);	718	_exit (EXIT_FAILURE);
616	}	719	}
617		720
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	721	stack_start = cctx->sptr;
619		722	stack_size = cctx->ssize;
620	#else
621
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{	723	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630		724
631	#endif	725	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	726	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
634		727
635	return stack;	728	return cctx;
636	}	729	}
637		730
638	static void	731	static void
639	stack_free (coro_stack *stack)	732	cctx_destroy (coro_cctx *cctx)
640	{	733	{
641	if (!stack || stack == main_stack)	734	if (!cctx)
642	return;	735	return;
643		736
		737	--cctx_count;
		738
		739	#if CORO_USE_VALGRIND
		740	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		741	#endif
		742
644	#if HAVE_MMAP	743	#if HAVE_MMAP
		744	if (cctx->mapped)
645	munmap (stack->sptr, stack->ssize);	745	munmap (cctx->sptr, cctx->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static void
656	stack_get (struct coro *coro)
657	{
658	if (stack_first)
659	{
660	coro->stack = stack_first;
661	stack_first = stack_first->next;
662	}
663	else	746	else
664	coro->stack = stack_new ();	747	#endif
665	}	748	Safefree (cctx->sptr);
666		749
667	static void	750	Safefree (cctx);
668	stack_put (coro_stack *stack)
669	{
670	stack->next = stack_first;
671	stack_first = stack;
672	}	751	}
		752
		753	static coro_cctx *
		754	cctx_get (pTHX)
		755	{
		756	while (cctx_first)
		757	{
		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
		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);
		784	}
		785
		786	++cctx_idle;
		787	cctx->next = cctx_first;
		788	cctx_first = cctx;
		789	}
		790
		791	/** coroutine switching *****************************************************/
673		792
674	/* never call directly, always through the coro_state_transfer global variable */	793	/* never call directly, always through the coro_state_transfer global variable */
675	static void	794	static void NOINLINE
676	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	795	transfer (pTHX_ struct coro *prev, struct coro *next)
677	{	796	{
678	dSTACKLEVEL;	797	dSTACKLEVEL;
679		798
680	/* sometimes transfer is only called to set idle_sp */	799	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	800	if (!next)
682	prev->stack->idle_sp = stacklevel;	801	{
683		802	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	803	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
685		804	}
686	if (prev != next)	805	else if (prev != next)
687	{	806	{
688	coro_stack *prev_stack = prev->stack;	807	coro_cctx *prev__cctx;
689		808
690	/* possibly "free" the stack */	809	if (prev->flags & CF_NEW)
691	if (prev_stack->idle_sp == stacklevel)
692	{	810	{
693	stack_put (prev_stack);	811	/* create a new empty context */
694	prev->stack = 0;	812	Newz (0, prev->cctx, 1, coro_cctx);
		813	prev->cctx->inuse = 1;
		814	prev->flags &= ~CF_NEW;
		815	prev->flags |= CF_RUNNING;
695	}	816	}
696		817
697	if (!next->mainstack)	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;
		830
		831	LOCK;
		832
		833	if (next->flags & CF_NEW)
698	{	834	{
		835	/* need to start coroutine */
		836	next->flags &= ~CF_NEW;
699	/* first get rid of the old state */	837	/* first get rid of the old state */
700	SAVE (prev, -1);	838	save_perl (aTHX_ prev);
701	/* setup coroutine call */	839	/* setup coroutine call */
702	setup_coro (next);	840	setup_coro (aTHX_ next);
703	next->stack = 0;	841	/* need a new stack */
		842	assert (!next->cctx);
704	}	843	}
705	else	844	else
706	{	845	{
707	SAVE (prev, flags);	846	/* coroutine already started */
708	LOAD (next);	847	save_perl (aTHX_ prev);
		848	load_perl (aTHX_ next);
709	}	849	}
710		850
		851	prev__cctx = prev->cctx;
		852
		853	/* possibly "free" the cctx */
		854	if (prev__cctx->idle_sp == STACKLEVEL)
		855	{
		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
		859	prev->cctx = 0;
		860
		861	cctx_put (prev__cctx);
		862	prev__cctx->inuse = 0;
		863	}
		864
711	if (!next->stack)	865	if (!next->cctx)
712	stack_get (next);	866	{
		867	next->cctx = cctx_get (aTHX);
		868	assert (!next->cctx->inuse);
		869	next->cctx->inuse = 1;
		870	}
713		871
714	if (prev_stack != next->stack)	872	if (prev__cctx != next->cctx)
		873	{
		874	prev__cctx->top_env = PL_top_env;
		875	PL_top_env = next->cctx->top_env;
715	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	876	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
716	}	877	}
717		878
718	transfer_tail ();	879	free_coro_mortal (aTHX);
		880	UNLOCK;
		881	}
719	}	882	}
720		883
721	/* use this function pointer to call the above function */	884	struct transfer_args
722	/* this is done to increase chances of the compiler not inlining the call */	885	{
723	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	886	struct coro *prev, *next;
		887	};
724		888
		889	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		890
		891	/** high level stuff ********************************************************/
		892
725	static void	893	static int
726	coro_state_destroy (struct coro *coro)	894	coro_state_destroy (pTHX_ struct coro *coro)
727	{	895	{
728	if (coro->refcnt--)	896	if (coro->flags & CF_DESTROYED)
729	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 */
730		911
731	if (coro->mainstack && coro->mainstack != main_mainstack)	912	if (coro->mainstack && coro->mainstack != main_mainstack)
732	{	913	{
733	struct coro temp;	914	struct coro temp;
734		915
735	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);
736	LOAD (aTHX_ coro);	925	load_perl (aTHX_ coro);
737		926
738	destroy_stacks (aTHX);	927	coro_destroy_stacks (aTHX);
739		928
740	LOAD ((&temp)); /* this will get rid of defsv etc.. */	929	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
741		930
742	coro->mainstack = 0;	931	coro->mainstack = 0;
743	}	932	}
744		933
745	stack_free (coro->stack);	934	cctx_destroy (coro->cctx);
746	SvREFCNT_dec (coro->args);	935	SvREFCNT_dec (coro->args);
747	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;
748	}	942	}
749		943
750	static int	944	static int
751	coro_state_clear (SV *sv, MAGIC *mg)	945	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
752	{	946	{
753	struct coro *coro = (struct coro *)mg->mg_ptr;	947	struct coro *coro = (struct coro *)mg->mg_ptr;
754	mg->mg_ptr = 0;	948	mg->mg_ptr = 0;
755		949
		950	coro->hv = 0;
		951
		952	if (--coro->refcnt < 0)
		953	{
756	coro_state_destroy (coro);	954	coro_state_destroy (aTHX_ coro);
		955	Safefree (coro);
		956	}
757		957
758	return 0;	958	return 0;
759	}	959	}
760		960
761	static int	961	static int
762	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	962	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
763	{	963	{
764	struct coro *coro = (struct coro *)mg->mg_ptr;	964	struct coro *coro = (struct coro *)mg->mg_ptr;
765		965
766	++coro->refcnt;	966	++coro->refcnt;
767		967
768	return 0;	968	return 0;
769	}	969	}
770		970
771	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	};
772		981
773	static struct coro *	982	static struct coro *
774	SvSTATE (SV *coro)	983	SvSTATE_ (pTHX_ SV *coro)
775	{	984	{
776	HV *stash;	985	HV *stash;
777	MAGIC *mg;	986	MAGIC *mg;
778		987
779	if (SvROK (coro))	988	if (SvROK (coro))
…		…
785	/* very slow, but rare, check */	994	/* very slow, but rare, check */
786	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	995	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
787	croak ("Coro::State object required");	996	croak ("Coro::State object required");
788	}	997	}
789		998
790	mg = SvMAGIC (coro);	999	mg = CORO_MAGIC (coro);
791	assert (mg->mg_type == PERL_MAGIC_ext);
792	return (struct coro *)mg->mg_ptr;	1000	return (struct coro *)mg->mg_ptr;
793	}	1001	}
794		1002
		1003	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1004
795	static void	1005	static void
		1006	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1007	{
		1008	ta->prev = SvSTATE (prev_sv);
		1009	ta->next = SvSTATE (next_sv);
		1010	}
		1011
		1012	static void
796	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1013	api_transfer (SV *prev_sv, SV *next_sv)
797	{	1014	{
798	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1015	dTHX;
		1016	struct transfer_args ta;
		1017
		1018	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1019	TRANSFER (ta);
		1020	}
		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;
799	}	1033	}
800		1034
801	/** Coro ********************************************************************/	1035	/** Coro ********************************************************************/
802		1036
803	#define PRIO_MAX 3
804	#define PRIO_HIGH 1
805	#define PRIO_NORMAL 0
806	#define PRIO_LOW -1
807	#define PRIO_IDLE -3
808	#define PRIO_MIN -4
809
810	/* for Coro.pm */
811	static GV *coro_current, *coro_idle;
812	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;
814
815	static void	1037	static void
816	coro_enq (pTHX_ SV *sv)	1038	coro_enq (pTHX_ SV *coro_sv)
817	{	1039	{
818	int prio;
819
820	if (SvTYPE (sv) != SVt_PVHV)
821	croak ("Coro::ready tried to enqueue something that is not a coroutine");
822
823	prio = SvSTATE (sv)->prio;
824
825	av_push (coro_ready [prio - PRIO_MIN], sv);	1040	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
826	coro_nready++;
827	}	1041	}
828		1042
829	static SV *	1043	static SV *
830	coro_deq (pTHX_ int min_prio)	1044	coro_deq (pTHX_ int min_prio)
831	{	1045	{
…		…
835	if (min_prio < 0)	1049	if (min_prio < 0)
836	min_prio = 0;	1050	min_prio = 0;
837		1051
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1052	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (AvFILLp (coro_ready [prio]) >= 0)	1053	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready [prio]);	1054	return av_shift (coro_ready [prio]);
843	}
844		1055
845	return 0;	1056	return 0;
846	}	1057	}
847		1058
848	static void	1059	static int
849	api_ready (SV *coro)	1060	api_ready (SV *coro_sv)
850	{	1061	{
851	dTHX;	1062	dTHX;
		1063	struct coro *coro;
852		1064
853	if (SvROK (coro))	1065	if (SvROK (coro_sv))
854	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;
855		1074
856	LOCK;	1075	LOCK;
857	coro_enq (aTHX_ SvREFCNT_inc (coro));	1076	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1077	++coro_nready;
858	UNLOCK;	1078	UNLOCK;
		1079
		1080	return 1;
		1081	}
		1082
		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
		1091	prepare_schedule (pTHX_ struct transfer_args *ta)
		1092	{
		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;
		1141
		1142	LOCK;
		1143	free_coro_mortal (aTHX);
		1144	coro_mortal = prev_sv;
		1145	UNLOCK;
		1146	}
		1147
		1148	static void
		1149	prepare_cede (pTHX_ struct transfer_args *ta)
		1150	{
		1151	api_ready (coro_current);
		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;
859	}	1167	}
860		1168
861	static void	1169	static void
862	api_schedule (void)	1170	api_schedule (void)
863	{	1171	{
864	dTHX;	1172	dTHX;
		1173	struct transfer_args ta;
865		1174
866	SV *prev, *next;	1175	prepare_schedule (aTHX_ &ta);
867	SV *current = GvSV (coro_current);	1176	TRANSFER (ta);
868
869	for (;;)
870	{
871	LOCK;
872
873	next = coro_deq (aTHX_ PRIO_MIN);
874
875	if (next)
876	break;
877
878	UNLOCK;
879
880	{
881	dSP;
882
883	ENTER;
884	SAVETMPS;
885
886	PUSHMARK (SP);
887	PUTBACK;
888	call_sv (GvSV (coro_idle), G_DISCARD);
889
890	FREETMPS;
891	LEAVE;
892	}
893	}
894
895	prev = SvRV (current);
896	SvRV (current) = next;
897
898	/* free this only after the transfer */
899	coro_mortal = prev;
900
901	UNLOCK;
902
903	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
904	}	1177	}
905		1178
906	static int coro_cede_self;
907
908	static void	1179	static int
909	api_cede (void)	1180	api_cede (void)
910	{	1181	{
911	dTHX;	1182	dTHX;
912	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1183	struct transfer_args ta;
913		1184
914	LOCK;	1185	prepare_cede (aTHX_ &ta);
915		1186
916	if (coro_cede_self)	1187	if (ta.prev != ta.next)
917	{	1188	{
918	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];	1189	TRANSFER (ta);
919	av_unshift (runqueue, 1);	1190	return 1;
920	av_store (runqueue, 0, current);
921	coro_nready++;
922	coro_cede_self = 0;
923	}	1191	}
924	else	1192	else
925	coro_enq (aTHX_ current);	1193	return 0;
		1194	}
926		1195
927	UNLOCK;	1196	static int
		1197	api_cede_notself (void)
		1198	{
		1199	dTHX;
		1200	struct transfer_args ta;
928		1201
929	api_schedule ();	1202	if (prepare_cede_notself (aTHX_ &ta))
		1203	{
		1204	TRANSFER (ta);
		1205	return 1;
		1206	}
		1207	else
		1208	return 0;
930	}	1209	}
931		1210
932	MODULE = Coro::State PACKAGE = Coro::State	1211	MODULE = Coro::State PACKAGE = Coro::State
933		1212
934	PROTOTYPES: DISABLE	1213	PROTOTYPES: DISABLE
…		…
940	#endif	1219	#endif
941	BOOT_PAGESIZE;	1220	BOOT_PAGESIZE;
942		1221
943	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1222	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
944		1223
945	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
946	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
947	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));
948		1231
949	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;
950		1237
951	coroapi.ver = CORO_API_VERSION;	1238	coroapi.ver = CORO_API_VERSION;
952	coroapi.transfer = api_transfer;	1239	coroapi.transfer = api_transfer;
953
954	Newz (0, main_stack, 1, coro_stack);
955	main_stack->idle_sp = (void *)-1;
956		1240
957	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1241	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
958	}	1242	}
959		1243
960	SV *	1244	SV *
…		…
965	HV *hv;	1249	HV *hv;
966	int i;	1250	int i;
967		1251
968	Newz (0, coro, 1, struct coro);	1252	Newz (0, coro, 1, struct coro);
969	coro->args = newAV ();	1253	coro->args = newAV ();
		1254	coro->save = CORO_SAVE_DEF;
		1255	coro->flags = CF_NEW;
970		1256
		1257	if (coro_first) coro_first->prev = coro;
		1258	coro->next = coro_first;
		1259	coro_first = coro;
		1260
971	hv = newHV ();	1261	coro->hv = hv = newHV ();
972	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;
973	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1263	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
974		1264
975	av_push (coro->args, newSVsv (RETVAL));
976	for (i = 1; i < items; i++)	1265	for (i = 1; i < items; i++)
977	av_push (coro->args, newSVsv (ST (i)));	1266	av_push (coro->args, newSVsv (ST (i)));
978
979	coro->stack = main_stack;
980	/*coro->mainstack = 0; *//*actual work is done inside transfer */
981	/*coro->stack = 0;*/
982	}	1267	}
983	OUTPUT:	1268	OUTPUT:
984	RETVAL	1269	RETVAL
985		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
986	void	1289	void
987	transfer (prev, next, flags)	1290	_set_stacklevel (...)
988	SV *prev	1291	ALIAS:
989	SV *next	1292	Coro::State::transfer = 1
990	int flags	1293	Coro::schedule = 2
		1294	Coro::cede = 3
		1295	Coro::cede_notself = 4
991	CODE:	1296	CODE:
992	PUTBACK;
993	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
994	SPAGAIN;
995
996	int
997	prio (Coro::State coro, int newprio = 0)
998	ALIAS:
999	nice = 1
1000	CODE:
1001	{	1297	{
1002	RETVAL = coro->prio;	1298	struct transfer_args ta;
1003		1299
1004	if (items > 1)	1300	switch (ix)
1005	{	1301	{
		1302	case 0:
		1303	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1304	ta.next = 0;
		1305	break;
		1306
		1307	case 1:
1006	if (ix)	1308	if (items != 2)
1007	newprio += coro->prio;	1309	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1008		1310
1009	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1311	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1010	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1312	break;
1011		1313
1012	coro->prio = newprio;	1314	case 2:
		1315	prepare_schedule (aTHX_ &ta);
		1316	break;
		1317
		1318	case 3:
		1319	prepare_cede (aTHX_ &ta);
		1320	break;
		1321
		1322	case 4:
		1323	if (!prepare_cede_notself (aTHX_ &ta))
		1324	XSRETURN_EMPTY;
		1325
		1326	break;
1013	}	1327	}
1014	}
1015		1328
1016	void	1329	BARRIER;
1017	_clear_idle_sp (Coro::State self)	1330	TRANSFER (ta);
		1331
		1332	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1333	XSRETURN_YES;
		1334	}
		1335
		1336	bool
		1337	_destroy (SV *coro_sv)
1018	CODE:	1338	CODE:
1019	self->stack->idle_sp = 0;	1339	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1020		1340	OUTPUT:
1021	void	1341	RETVAL
1022	_clone_state_from (SV *dst, SV *src)
1023	CODE:
1024	{
1025	struct coro *coro_src = SvSTATE (src);
1026
1027	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028
1029	++coro_src->refcnt;
1030	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1031	}
1032		1342
1033	void	1343	void
1034	_exit (code)	1344	_exit (code)
1035	int code	1345	int code
1036	PROTOTYPE: $	1346	PROTOTYPE: $
1037	CODE:	1347	CODE:
1038	_exit (code);	1348	_exit (code);
1039		1349
1040	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
1041		1372
1042	void	1373	void
1043	yield (...)	1374	list ()
1044	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	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: $
1045	CODE:	1449	CODE:
1046	{	1450	RETVAL = coro_rss (coro);
1047	SV *yieldstack;	1451	OUTPUT:
1048	SV *sv;	1452	RETVAL
1049	AV *defav = GvAV (PL_defgv);
1050	struct coro *prev, *next;
1051		1453
1052	yieldstack = *hv_fetch (
1053	(HV *)SvRV (GvSV (coro_current)),
1054	"yieldstack", sizeof ("yieldstack") - 1,
1055	0
1056	);
1057
1058	/* set up @_ -- ugly */
1059	av_clear (defav);
1060	av_fill (defav, items - 1);
1061	while (items--)
1062	av_store (defav, items, SvREFCNT_inc (ST(items)));
1063
1064	sv = av_pop ((AV *)SvRV (yieldstack));
1065	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1066	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1067	SvREFCNT_dec (sv);
1068
1069	coro_state_transfer (aTHX_ prev, next, 0);
1070	}
1071		1454
1072	MODULE = Coro::State PACKAGE = Coro	1455	MODULE = Coro::State PACKAGE = Coro
1073		1456
1074	BOOT:	1457	BOOT:
1075	{	1458	{
1076	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);
1077		1467
1078	coro_stash = gv_stashpv ("Coro", TRUE);	1468	coro_stash = gv_stashpv ("Coro", TRUE);
1079		1469
1080	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1470	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1471	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1472	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1473	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1474	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1475	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086		1476
1087	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1088	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1089
1090	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1477	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091	coro_ready[i] = newAV ();	1478	coro_ready[i] = newAV ();
1092		1479
1093	{	1480	{
1094	SV *sv = perl_get_sv("Coro::API", 1);	1481	SV *sv = perl_get_sv("Coro::API", 1);
1095		1482
1096	coroapi.schedule = api_schedule;	1483	coroapi.schedule = api_schedule;
		1484	coroapi.save = api_save;
1097	coroapi.cede = api_cede;	1485	coroapi.cede = api_cede;
		1486	coroapi.cede_notself = api_cede_notself;
1098	coroapi.ready = api_ready;	1487	coroapi.ready = api_ready;
		1488	coroapi.is_ready = api_is_ready;
1099	coroapi.nready = &coro_nready;	1489	coroapi.nready = &coro_nready;
1100	coroapi.current = coro_current;	1490	coroapi.current = coro_current;
1101		1491
1102	GCoroAPI = &coroapi;	1492	GCoroAPI = &coroapi;
1103	sv_setiv (sv, (IV)&coroapi);	1493	sv_setiv (sv, (IV)&coroapi);
1104	SvREADONLY_on (sv);	1494	SvREADONLY_on (sv);
1105	}	1495	}
1106	}	1496	}
1107		1497
1108	void	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)));
		1504
		1505	int
		1506	prio (Coro::State coro, int newprio = 0)
		1507	ALIAS:
		1508	nice = 1
		1509	CODE:
		1510	{
		1511	RETVAL = coro->prio;
		1512
		1513	if (items > 1)
		1514	{
		1515	if (ix)
		1516	newprio = coro->prio - newprio;
		1517
		1518	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1519	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1520
		1521	coro->prio = newprio;
		1522	}
		1523	}
		1524	OUTPUT:
		1525	RETVAL
		1526
		1527	SV *
1109	ready (SV *self)	1528	ready (SV *self)
1110	PROTOTYPE: $	1529	PROTOTYPE: $
1111	CODE:	1530	CODE:
1112	api_ready (self);	1531	RETVAL = boolSV (api_ready (self));
		1532	OUTPUT:
		1533	RETVAL
1113		1534
1114	int	1535	int
1115	nready (...)	1536	nready (...)
1116	PROTOTYPE:	1537	PROTOTYPE:
1117	CODE:	1538	CODE:
1118	RETVAL = coro_nready;	1539	RETVAL = coro_nready;
1119	OUTPUT:	1540	OUTPUT:
1120	RETVAL	1541	RETVAL
1121		1542
		1543	# for async_pool speedup
1122	void	1544	void
1123	schedule (...)	1545	_pool_1 (SV *cb)
1124	PROTOTYPE:
1125	CODE:	1546	CODE:
1126	api_schedule ();	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	}
1127		1574
1128	void	1575	void
1129	_set_cede_self ()	1576	_pool_2 (SV *cb)
1130	CODE:	1577	CODE:
1131	coro_cede_self = 1;	1578	{
		1579	struct coro *coro = SvSTATE (coro_current);
1132		1580
1133	void	1581	sv_setsv (cb, &PL_sv_undef);
1134	cede (...)	1582
1135	PROTOTYPE:	1583	if (coro_rss (coro) > SvIV (sv_pool_rss)
1136	CODE:	1584	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1137	api_cede ();	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
1138		1595
1139	MODULE = Coro::State PACKAGE = Coro::AIO	1596	MODULE = Coro::State PACKAGE = Coro::AIO
1140		1597
1141	SV *	1598	SV *
1142	_get_state ()	1599	_get_state ()
1143	CODE:	1600	CODE:
1144	{	1601	{
1145	struct {	1602	struct io_state *data;
1146	int errorno;
1147	int laststype;
1148	int laststatval;
1149	Stat_t statcache;
1150	} data;
1151		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
1152	data.errorno = errno;	1609	data->errorno = errno;
1153	data.laststype = PL_laststype;	1610	data->laststype = PL_laststype;
1154	data.laststatval = PL_laststatval;	1611	data->laststatval = PL_laststatval;
1155	data.statcache = PL_statcache;	1612	data->statcache = PL_statcache;
1156
1157	RETVAL = newSVpvn ((char *)&data, sizeof data);
1158	}	1613	}
1159	OUTPUT:	1614	OUTPUT:
1160	RETVAL	1615	RETVAL
1161		1616
1162	void	1617	void
1163	_set_state (char *data_)	1618	_set_state (char *data_)
1164	PROTOTYPE: $	1619	PROTOTYPE: $
1165	CODE:	1620	CODE:
1166	{	1621	{
1167	struct {	1622	struct io_state *data = (void *)data_;
1168	int errorno;
1169	int laststype;
1170	int laststatval;
1171	Stat_t statcache;
1172	} *data = (void *)data_;
1173		1623
1174	errno = data->errorno;	1624	errno = data->errorno;
1175	PL_laststype = data->laststype;	1625	PL_laststype = data->laststype;
1176	PL_laststatval = data->laststatval;	1626	PL_laststatval = data->laststatval;
1177	PL_statcache = data->statcache;	1627	PL_statcache = data->statcache;
1178	}	1628	}
		1629

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