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Comparing Coro/Coro/State.xs (file contents):
Revision 1.128 by root, Fri Dec 22 04:22:28 2006 UTC vs.
Revision 1.245 by root, Mon Sep 22 05:40:21 2008 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#include <stdio.h>	12	#include <stdio.h>
10	#include <errno.h>	13	#include <errno.h>
11	#include <assert.h>	14	#include <assert.h>
		15
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
12		24
13	#ifdef HAVE_MMAP	25	#ifdef HAVE_MMAP
14	# include <unistd.h>	26	# include <unistd.h>
15	# include <sys/mman.h>	27	# include <sys/mman.h>
16	# ifndef MAP_ANONYMOUS	28	# ifndef MAP_ANONYMOUS
…		…
31	#else	43	#else
32	# define PAGESIZE 0	44	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	45	# define BOOT_PAGESIZE (void)0
34	#endif	46	#endif
35		47
36	#if USE_VALGRIND	48	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	49	# include <valgrind/valgrind.h>
		50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
38	#endif	53	#endif
39		54
40	/* the maximum number of idle cctx that will be pooled */	55	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	56	#define MAX_IDLE_CCTX 8
42		57
…		…
65	# ifndef IS_PADCONST	80	# ifndef IS_PADCONST
66	# define IS_PADCONST(v) 0	81	# define IS_PADCONST(v) 0
67	# endif	82	# endif
68	#endif	83	#endif
69		84
		85	/* 5.8.8 */
		86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
70	/* 5.8.7 */	98	/* 5.8.7 */
71	#ifndef SvRV_set	99	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	100	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	101	#endif
74		102
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	104	# undef CORO_STACKGUARD
77	#endif	105	#endif
78		106
79	#ifndef STACKGUARD	107	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	108	# define CORO_STACKGUARD 0
81	#endif	109	#endif
82		110
83	/* prefer perl internal functions over our own? */	111	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	112	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	113	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	114	#endif
87		115
88	/* The next macro should declare a variable stacklevel that contains and approximation	116	/* The next macros try to return the current stack pointer, in an as
89	* to the current C stack pointer. Its property is that it changes with each call	117	* portable way as possible. */
90	* and should be unique. */
91	#define dSTACKLEVEL int stacklevel	118	#define dSTACKLEVEL volatile char stacklevel
92	#define STACKLEVEL ((void *)&stacklevel)	119	#define STACKLEVEL ((void *)&stacklevel)
93		120
94	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
95		122
96	#if __GNUC__ >= 3	123	#if __GNUC__ >= 3
97	# define attribute(x) __attribute__(x)	124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
98	#else	127	#else
99	# define attribute(x)	128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
100	#endif	131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
101		135
102	#define NOINLINE attribute ((noinline))	136	#define NOINLINE attribute ((noinline))
103		137
104	#include "CoroAPI.h"	138	#include "CoroAPI.h"
105		139
…		…
110	#else	144	#else
111	# define LOCK (void)0	145	# define LOCK (void)0
112	# define UNLOCK (void)0	146	# define UNLOCK (void)0
113	#endif	147	#endif
114		148
		149	/* helper storage struct for Coro::AIO */
115	struct io_state	150	struct io_state
116	{	151	{
117	int errorno;	152	int errorno;
118	I32 laststype;	153	I32 laststype;
119	int laststatval;	154	int laststatval;
120	Stat_t statcache;	155	Stat_t statcache;
121	};	156	};
122		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
123	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
124	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
125	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
126	static SV *coro_mortal; /* will be freed after next transfer */	163	static volatile SV *coro_mortal; /* will be freed after next transfer */
		164
		165	static GV *irsgv; /* $/ */
		166	static GV *stdoutgv; /* *STDOUT */
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV *hv_sig; /* %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	/* Coro::AnyEvent */
		177	static SV *sv_activity;
127		178
128	static struct coro_cctx *cctx_first;	179	static struct coro_cctx *cctx_first;
129	static int cctx_count, cctx_idle;	180	static int cctx_count, cctx_idle;
		181
		182	enum {
		183	CC_MAPPED = 0x01,
		184	CC_NOREUSE = 0x02, /* throw this away after tracing */
		185	CC_TRACE = 0x04,
		186	CC_TRACE_SUB = 0x08, /* trace sub calls */
		187	CC_TRACE_LINE = 0x10, /* trace each statement */
		188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		189	};
130		190
131	/* this is a structure representing a c-level coroutine */	191	/* this is a structure representing a c-level coroutine */
132	typedef struct coro_cctx {	192	typedef struct coro_cctx {
133	struct coro_cctx *next;	193	struct coro_cctx *next;
134		194
135	/* the stack */	195	/* the stack */
136	void *sptr;	196	void *sptr;
137	long ssize; /* positive == mmap, otherwise malloc */	197	size_t ssize;
138		198
139	/* cpu state */	199	/* cpu state */
140	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	200	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		201	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
141	JMPENV *top_env;	202	JMPENV *top_env;
142	coro_context cctx;	203	coro_context cctx;
143		204
144	int inuse;
145
146	#if USE_VALGRIND	205	#if CORO_USE_VALGRIND
147	int valgrind_id;	206	int valgrind_id;
148	#endif	207	#endif
		208	unsigned char flags;
149	} coro_cctx;	209	} coro_cctx;
150		210
151	enum {	211	enum {
152	CF_RUNNING = 0x0001, /* coroutine is running */	212	CF_RUNNING = 0x0001, /* coroutine is running */
153	CF_READY = 0x0002, /* coroutine is ready */	213	CF_READY = 0x0002, /* coroutine is ready */
154	CF_NEW = 0x0004, /* ahs never been switched to */	214	CF_NEW = 0x0004, /* has never been switched to */
		215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
155	};	216	};
		217
		218	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		219	typedef struct {
		220	SV *defsv;
		221	AV *defav;
		222	SV *errsv;
		223	SV *irsgv;
		224	#define VAR(name,type) type name;
		225	# include "state.h"
		226	#undef VAR
		227	} perl_slots;
		228
		229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
156		230
157	/* this is a structure representing a perl-level coroutine */	231	/* this is a structure representing a perl-level coroutine */
158	struct coro {	232	struct coro {
159	/* the c coroutine allocated to this perl coroutine, if any */	233	/* the c coroutine allocated to this perl coroutine, if any */
160	coro_cctx *cctx;	234	coro_cctx *cctx;
161		235
		236	/* process data */
		237	AV *mainstack;
		238	perl_slots *slot; /* basically the saved sp */
		239
162	/* data associated with this coroutine (initial args) */	240	AV *args; /* data associated with this coroutine (initial args) */
163	AV *args;	241	int refcnt; /* coroutines are refcounted, yes */
164	int refcnt;
165	int save; /* CORO_SAVE flags */
166	int flags; /* CF_ flags */	242	int flags; /* CF_ flags */
		243	HV *hv; /* the perl hash associated with this coro, if any */
167		244
168	/* optionally saved, might be zero */	245	/* statistics */
169	AV *defav; /* @_ */	246	int usecount; /* number of transfers to this coro */
170	SV *defsv; /* $_ */
171	SV *errsv; /* $@ */
172	SV *irssv; /* $/ */
173	SV *irssv_sv; /* real $/ cache */
174
175	#define VAR(name,type) type name;
176	# include "state.h"
177	#undef VAR
178		247
179	/* coro process data */	248	/* coro process data */
180	int prio;	249	int prio;
		250	SV *throw; /* exception to be thrown */
		251
		252	/* async_pool */
		253	SV *saved_deffh;
		254
		255	/* linked list */
		256	struct coro *next, *prev;
181	};	257	};
182		258
183	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
184	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
185		261
		262	/** Coro ********************************************************************/
		263
		264	#define PRIO_MAX 3
		265	#define PRIO_HIGH 1
		266	#define PRIO_NORMAL 0
		267	#define PRIO_LOW -1
		268	#define PRIO_IDLE -3
		269	#define PRIO_MIN -4
		270
		271	/* for Coro.pm */
		272	static SV *coro_current;
		273	static SV *coro_readyhook;
		274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		275	static int coro_nready;
		276	static struct coro *coro_first;
		277
		278	/** lowlevel stuff **********************************************************/
		279
		280	static SV *
		281	coro_get_sv (pTHX_ const char *name, int create)
		282	{
		283	#if PERL_VERSION_ATLEAST (5,10,0)
		284	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		285	get_sv (name, create);
		286	#endif
		287	return get_sv (name, create);
		288	}
		289
186	static AV *	290	static AV *
		291	coro_get_av (pTHX_ const char *name, int create)
		292	{
		293	#if PERL_VERSION_ATLEAST (5,10,0)
		294	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		295	get_av (name, create);
		296	#endif
		297	return get_av (name, create);
		298	}
		299
		300	static HV *
		301	coro_get_hv (pTHX_ const char *name, int create)
		302	{
		303	#if PERL_VERSION_ATLEAST (5,10,0)
		304	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		305	get_hv (name, create);
		306	#endif
		307	return get_hv (name, create);
		308	}
		309
		310	static AV *
187	coro_clone_padlist (CV *cv)	311	coro_clone_padlist (pTHX_ CV *cv)
188	{	312	{
189	AV *padlist = CvPADLIST (cv);	313	AV *padlist = CvPADLIST (cv);
190	AV *newpadlist, *newpad;	314	AV *newpadlist, *newpad;
191		315
192	newpadlist = newAV ();	316	newpadlist = newAV ();
193	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
194	#if PERL_VERSION_ATLEAST (5,9,0)	318	#if PERL_VERSION_ATLEAST (5,10,0)
195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
196	#else	320	#else
197	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
198	#endif	322	#endif
199	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
204		328
205	return newpadlist;	329	return newpadlist;
206	}	330	}
207		331
208	static void	332	static void
209	free_padlist (AV *padlist)	333	free_padlist (pTHX_ AV *padlist)
210	{	334	{
211	/* may be during global destruction */	335	/* may be during global destruction */
212	if (SvREFCNT (padlist))	336	if (SvREFCNT (padlist))
213	{	337	{
214	I32 i = AvFILLp (padlist);	338	I32 i = AvFILLp (padlist);
…		…
235	AV *padlist;	359	AV *padlist;
236	AV *av = (AV *)mg->mg_obj;	360	AV *av = (AV *)mg->mg_obj;
237		361
238	/* casting is fun. */	362	/* casting is fun. */
239	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	363	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
240	free_padlist (padlist);	364	free_padlist (aTHX_ padlist);
241		365
242	SvREFCNT_dec (av);	366	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
243		367
244	return 0;	368	return 0;
245	}	369	}
246		370
247	#define PERL_MAGIC_coro PERL_MAGIC_ext	371	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		372	#define CORO_MAGIC_type_state PERL_MAGIC_ext
248		373
249	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	374	static MGVTBL coro_cv_vtbl = {
		375	0, 0, 0, 0,
		376	coro_cv_free
		377	};
250		378
251	#define CORO_MAGIC(cv) \	379	#define CORO_MAGIC(sv,type) \
252	SvMAGIC (cv) \	380	SvMAGIC (sv) \
253	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	381	? SvMAGIC (sv)->mg_type == type \
254	? SvMAGIC (cv) \	382	? SvMAGIC (sv) \
255	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	383	: mg_find (sv, type) \
256	: 0	384	: 0
		385
		386	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		387	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		388
		389	static struct coro *
		390	SvSTATE_ (pTHX_ SV *coro)
		391	{
		392	HV *stash;
		393	MAGIC *mg;
		394
		395	if (SvROK (coro))
		396	coro = SvRV (coro);
		397
		398	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		399	croak ("Coro::State object required");
		400
		401	stash = SvSTASH (coro);
		402	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		403	{
		404	/* very slow, but rare, check */
		405	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		406	croak ("Coro::State object required");
		407	}
		408
		409	mg = CORO_MAGIC_state (coro);
		410	return (struct coro *)mg->mg_ptr;
		411	}
		412
		413	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
257		414
258	/* the next two functions merely cache the padlists */	415	/* the next two functions merely cache the padlists */
259	static void	416	static void
260	get_padlist (CV *cv)	417	get_padlist (pTHX_ CV *cv)
261	{	418	{
262	MAGIC *mg = CORO_MAGIC (cv);	419	MAGIC *mg = CORO_MAGIC_cv (cv);
263	AV *av;	420	AV *av;
264		421
265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	422	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	423	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
267	else	424	else
268	{	425	{
269	#if PREFER_PERL_FUNCTIONS	426	#if CORO_PREFER_PERL_FUNCTIONS
270	/* this is probably cleaner, but also slower? */	427	/* this is probably cleaner? but also slower! */
		428	/* in practise, it seems to be less stable */
271	CV *cp = Perl_cv_clone (cv);	429	CV *cp = Perl_cv_clone (cv);
272	CvPADLIST (cv) = CvPADLIST (cp);	430	CvPADLIST (cv) = CvPADLIST (cp);
273	CvPADLIST (cp) = 0;	431	CvPADLIST (cp) = 0;
274	SvREFCNT_dec (cp);	432	SvREFCNT_dec (cp);
275	#else	433	#else
276	CvPADLIST (cv) = coro_clone_padlist (cv);	434	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
277	#endif	435	#endif
278	}	436	}
279	}	437	}
280		438
281	static void	439	static void
282	put_padlist (CV *cv)	440	put_padlist (pTHX_ CV *cv)
283	{	441	{
284	MAGIC *mg = CORO_MAGIC (cv);	442	MAGIC *mg = CORO_MAGIC_cv (cv);
285	AV *av;	443	AV *av;
286		444
287	if (!mg)	445	if (expect_false (!mg))
288	{	446	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291	mg->mg_virtual = &vtbl_coro;
292	mg->mg_obj = (SV *)newAV ();
293	}
294		447
295	av = (AV *)mg->mg_obj;	448	av = (AV *)mg->mg_obj;
296		449
297	if (AvFILLp (av) >= AvMAX (av))	450	if (expect_false (AvFILLp (av) >= AvMAX (av)))
298	av_extend (av, AvMAX (av) + 1);	451	av_extend (av, AvMAX (av) + 1);
299		452
300	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	453	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
301	}	454	}
302		455
303	#define SB do {	456	/** load & save, init *******************************************************/
304	#define SE } while (0)
305
306	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
307		457
308	static void	458	static void
309	load_perl (Coro__State c)	459	load_perl (pTHX_ Coro__State c)
310	{	460	{
		461	perl_slots *slot = c->slot;
		462	c->slot = 0;
		463
		464	PL_mainstack = c->mainstack;
		465
		466	GvSV (PL_defgv) = slot->defsv;
		467	GvAV (PL_defgv) = slot->defav;
		468	GvSV (PL_errgv) = slot->errsv;
		469	GvSV (irsgv) = slot->irsgv;
		470
311	#define VAR(name,type) PL_ ## name = c->name;	471	#define VAR(name,type) PL_ ## name = slot->name;
312	# include "state.h"	472	# include "state.h"
313	#undef VAR	473	#undef VAR
314
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318	if (c->irssv)
319	{
320	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
321	SvREFCNT_dec (c->irssv);
322	else
323	{
324	REPLACE_SV (PL_rs, c->irssv);
325	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
326	sv_setsv (c->irssv_sv, PL_rs);
327	}
328	}
329		474
330	{	475	{
331	dSP;	476	dSP;
		477
332	CV *cv;	478	CV *cv;
333		479
334	/* now do the ugly restore mess */	480	/* now do the ugly restore mess */
335	while ((cv = (CV *)POPs))	481	while (expect_true (cv = (CV *)POPs))
336	{	482	{
337	put_padlist (cv); /* mark this padlist as available */	483	put_padlist (aTHX_ cv); /* mark this padlist as available */
338	CvDEPTH (cv) = PTR2IV (POPs);	484	CvDEPTH (cv) = PTR2IV (POPs);
339	CvPADLIST (cv) = (AV *)POPs;	485	CvPADLIST (cv) = (AV *)POPs;
340	}	486	}
341		487
342	PUTBACK;	488	PUTBACK;
343	}	489	}
344	}	490	}
345		491
346	static void	492	static void
347	save_perl (Coro__State c)	493	save_perl (pTHX_ Coro__State c)
348	{	494	{
349	{	495	{
350	dSP;	496	dSP;
351	I32 cxix = cxstack_ix;	497	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	498	PERL_CONTEXT *ccstk = cxstack;
…		…
355	/*	501	/*
356	* the worst thing you can imagine happens first - we have to save	502	* the worst thing you can imagine happens first - we have to save
357	* (and reinitialize) all cv's in the whole callchain :(	503	* (and reinitialize) all cv's in the whole callchain :(
358	*/	504	*/
359		505
360	EXTEND (SP, 3 + 1);
361	PUSHs (Nullsv);	506	XPUSHs (Nullsv);
362	/* this loop was inspired by pp_caller */	507	/* this loop was inspired by pp_caller */
363	for (;;)	508	for (;;)
364	{	509	{
365	while (cxix >= 0)	510	while (expect_true (cxix >= 0))
366	{	511	{
367	PERL_CONTEXT *cx = &ccstk[cxix--];	512	PERL_CONTEXT *cx = &ccstk[cxix--];
368		513
369	if (CxTYPE (cx) == CXt_SUB)	514	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
370	{	515	{
371	CV *cv = cx->blk_sub.cv;	516	CV *cv = cx->blk_sub.cv;
372		517
373	if (CvDEPTH (cv))	518	if (expect_true (CvDEPTH (cv)))
374	{	519	{
375	EXTEND (SP, 3);	520	EXTEND (SP, 3);
376	PUSHs ((SV *)CvPADLIST (cv));	521	PUSHs ((SV *)CvPADLIST (cv));
377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	522	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
378	PUSHs ((SV *)cv);	523	PUSHs ((SV *)cv);
379		524
380	CvDEPTH (cv) = 0;	525	CvDEPTH (cv) = 0;
381	get_padlist (cv);	526	get_padlist (aTHX_ cv);
382	}	527	}
383	}	528	}
384	}	529	}
385		530
386	if (top_si->si_type == PERLSI_MAIN)	531	if (expect_true (top_si->si_type == PERLSI_MAIN))
387	break;	532	break;
388		533
389	top_si = top_si->si_prev;	534	top_si = top_si->si_prev;
390	ccstk = top_si->si_cxstack;	535	ccstk = top_si->si_cxstack;
391	cxix = top_si->si_cxix;	536	cxix = top_si->si_cxix;
392	}	537	}
393		538
394	PUTBACK;	539	PUTBACK;
395	}	540	}
396		541
397	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	542	/* allocate some space on the context stack for our purposes */
398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	543	/* we manually unroll here, as usually 2 slots is enough */
399	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	544	if (SLOT_COUNT >= 1) CXINC;
400	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	545	if (SLOT_COUNT >= 2) CXINC;
		546	if (SLOT_COUNT >= 3) CXINC;
		547	{
		548	int i;
		549	for (i = 3; i < SLOT_COUNT; ++i)
		550	CXINC;
		551	}
		552	cxstack_ix -= SLOT_COUNT; /* undo allocation */
401		553
		554	c->mainstack = PL_mainstack;
		555
		556	{
		557	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		558
		559	slot->defav = GvAV (PL_defgv);
		560	slot->defsv = DEFSV;
		561	slot->errsv = ERRSV;
		562	slot->irsgv = GvSV (irsgv);
		563
402	#define VAR(name,type)c->name = PL_ ## name;	564	#define VAR(name,type) slot->name = PL_ ## name;
403	# include "state.h"	565	# include "state.h"
404	#undef VAR	566	#undef VAR
		567	}
405	}	568	}
406		569
407	/*	570	/*
408	* allocate various perl stacks. This is an exact copy	571	* allocate various perl stacks. This is an exact copy
409	* of perl.c:init_stacks, except that it uses less memory	572	* of perl.c:init_stacks, except that it uses less memory
410	* on the (sometimes correct) assumption that coroutines do	573	* on the (sometimes correct) assumption that coroutines do
411	* not usually need a lot of stackspace.	574	* not usually need a lot of stackspace.
412	*/	575	*/
413	#if PREFER_PERL_FUNCTIONS	576	#if CORO_PREFER_PERL_FUNCTIONS
414	# define coro_init_stacks init_stacks	577	# define coro_init_stacks init_stacks
415	#else	578	#else
416	static void	579	static void
417	coro_init_stacks ()	580	coro_init_stacks (pTHX)
418	{	581	{
419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	582	PL_curstackinfo = new_stackinfo(32, 8);
420	PL_curstackinfo->si_type = PERLSI_MAIN;	583	PL_curstackinfo->si_type = PERLSI_MAIN;
421	PL_curstack = PL_curstackinfo->si_stack;	584	PL_curstack = PL_curstackinfo->si_stack;
422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	585	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423		586
424	PL_stack_base = AvARRAY(PL_curstack);	587	PL_stack_base = AvARRAY(PL_curstack);
425	PL_stack_sp = PL_stack_base;	588	PL_stack_sp = PL_stack_base;
426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	589	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427		590
428	New(50,PL_tmps_stack,128,SV*);	591	New(50,PL_tmps_stack,32,SV*);
429	PL_tmps_floor = -1;	592	PL_tmps_floor = -1;
430	PL_tmps_ix = -1;	593	PL_tmps_ix = -1;
431	PL_tmps_max = 128;	594	PL_tmps_max = 32;
432		595
433	New(54,PL_markstack,32,I32);	596	New(54,PL_markstack,16,I32);
434	PL_markstack_ptr = PL_markstack;	597	PL_markstack_ptr = PL_markstack;
435	PL_markstack_max = PL_markstack + 32;	598	PL_markstack_max = PL_markstack + 16;
436		599
437	#ifdef SET_MARK_OFFSET	600	#ifdef SET_MARK_OFFSET
438	SET_MARK_OFFSET;	601	SET_MARK_OFFSET;
439	#endif	602	#endif
440		603
441	New(54,PL_scopestack,32,I32);	604	New(54,PL_scopestack,8,I32);
442	PL_scopestack_ix = 0;	605	PL_scopestack_ix = 0;
443	PL_scopestack_max = 32;	606	PL_scopestack_max = 8;
444		607
445	New(54,PL_savestack,64,ANY);	608	New(54,PL_savestack,24,ANY);
446	PL_savestack_ix = 0;	609	PL_savestack_ix = 0;
447	PL_savestack_max = 64;	610	PL_savestack_max = 24;
448		611
449	#if !PERL_VERSION_ATLEAST (5,9,0)	612	#if !PERL_VERSION_ATLEAST (5,10,0)
450	New(54,PL_retstack,16,OP*);	613	New(54,PL_retstack,4,OP*);
451	PL_retstack_ix = 0;	614	PL_retstack_ix = 0;
452	PL_retstack_max = 16;	615	PL_retstack_max = 4;
453	#endif	616	#endif
454	}	617	}
455	#endif	618	#endif
456		619
457	/*	620	/*
458	* destroy the stacks, the callchain etc...	621	* destroy the stacks, the callchain etc...
459	*/	622	*/
460	static void	623	static void
461	coro_destroy_stacks ()	624	coro_destroy_stacks (pTHX)
462	{	625	{
463	if (!IN_DESTRUCT)
464	{
465	/* restore all saved variables and stuff */
466	LEAVE_SCOPE (0);
467	assert (PL_tmps_floor == -1);
468
469	/* free all temporaries */
470	FREETMPS;
471	assert (PL_tmps_ix == -1);
472
473	POPSTACK_TO (PL_mainstack);
474	}
475
476	while (PL_curstackinfo->si_next)	626	while (PL_curstackinfo->si_next)
477	PL_curstackinfo = PL_curstackinfo->si_next;	627	PL_curstackinfo = PL_curstackinfo->si_next;
478		628
479	while (PL_curstackinfo)	629	while (PL_curstackinfo)
480	{	630	{
…		…
490		640
491	Safefree (PL_tmps_stack);	641	Safefree (PL_tmps_stack);
492	Safefree (PL_markstack);	642	Safefree (PL_markstack);
493	Safefree (PL_scopestack);	643	Safefree (PL_scopestack);
494	Safefree (PL_savestack);	644	Safefree (PL_savestack);
495	#if !PERL_VERSION_ATLEAST (5,9,0)	645	#if !PERL_VERSION_ATLEAST (5,10,0)
496	Safefree (PL_retstack);	646	Safefree (PL_retstack);
497	#endif	647	#endif
498	}	648	}
499		649
		650	static size_t
		651	coro_rss (pTHX_ struct coro *coro)
		652	{
		653	size_t rss = sizeof (*coro);
		654
		655	if (coro->mainstack)
		656	{
		657	perl_slots tmp_slot;
		658	perl_slots *slot;
		659
		660	if (coro->flags & CF_RUNNING)
		661	{
		662	slot = &tmp_slot;
		663
		664	#define VAR(name,type) slot->name = PL_ ## name;
		665	# include "state.h"
		666	#undef VAR
		667	}
		668	else
		669	slot = coro->slot;
		670
		671	if (slot)
		672	{
		673	rss += sizeof (slot->curstackinfo);
		674	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		675	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		676	rss += slot->tmps_max * sizeof (SV *);
		677	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		678	rss += slot->scopestack_max * sizeof (I32);
		679	rss += slot->savestack_max * sizeof (ANY);
		680
		681	#if !PERL_VERSION_ATLEAST (5,10,0)
		682	rss += slot->retstack_max * sizeof (OP *);
		683	#endif
		684	}
		685	}
		686
		687	return rss;
		688	}
		689
		690	/** coroutine stack handling ************************************************/
		691
		692	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		693	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		694	static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
		695
		696	/* apparently < 5.8.8 */
		697	#ifndef MgPV_nolen_const
		698	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		699	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
		700	(const char*)(mg)->mg_ptr)
		701	#endif
		702
		703	/*
		704	* This overrides the default magic get method of %SIG elements.
		705	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		706	* and instead of tryign to save and restore the hash elements, we just provide
		707	* readback here.
		708	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		709	* not expecting this to actually change the hook. This is a potential problem
		710	* when a schedule happens then, but we ignore this.
		711	*/
		712	static int
		713	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		714	{
		715	const char *s = MgPV_nolen_const (mg);
		716
		717	if (*s == '_')
		718	{
		719	SV **svp = 0;
		720
		721	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		722	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		723
		724	if (svp)
		725	{
		726	sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
		727	return 0;
		728	}
		729	}
		730
		731	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		732	}
		733
		734	static int
		735	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		736	{
		737	const char *s = MgPV_nolen_const (mg);
		738
		739	if (*s == '_')
		740	{
		741	SV **svp = 0;
		742
		743	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		744	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		745
		746	if (svp)
		747	{
		748	SV *old = *svp;
		749	*svp = 0;
		750	SvREFCNT_dec (old);
		751	return 0;
		752	}
		753	}
		754
		755	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		756	}
		757
		758	static int
		759	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		760	{
		761	const char *s = MgPV_nolen_const (mg);
		762
		763	if (*s == '_')
		764	{
		765	SV **svp = 0;
		766
		767	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		768	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		769
		770	if (svp)
		771	{
		772	SV *old = *svp;
		773	*svp = newSVsv (sv);
		774	SvREFCNT_dec (old);
		775	return 0;
		776	}
		777	}
		778
		779	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		780	}
		781
500	static void	782	static void
501	setup_coro (struct coro *coro)	783	coro_setup (pTHX_ struct coro *coro)
502	{	784	{
503	/*	785	/*
504	* emulate part of the perl startup here.	786	* emulate part of the perl startup here.
505	*/	787	*/
506
507	coro_init_stacks ();	788	coro_init_stacks (aTHX);
508		789
		790	PL_runops = RUNOPS_DEFAULT;
509	PL_curcop = &PL_compiling;	791	PL_curcop = &PL_compiling;
510	PL_in_eval = EVAL_NULL;	792	PL_in_eval = EVAL_NULL;
		793	PL_comppad = 0;
511	PL_curpm = 0;	794	PL_curpm = 0;
		795	PL_curpad = 0;
512	PL_localizing = 0;	796	PL_localizing = 0;
513	PL_dirty = 0;	797	PL_dirty = 0;
514	PL_restartop = 0;	798	PL_restartop = 0;
		799	#if PERL_VERSION_ATLEAST (5,10,0)
		800	PL_parser = 0;
		801	#endif
		802
		803	/* recreate the die/warn hooks */
		804	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		805	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		806
		807	GvSV (PL_defgv) = newSV (0);
		808	GvAV (PL_defgv) = coro->args; coro->args = 0;
		809	GvSV (PL_errgv) = newSV (0);
		810	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		811	PL_rs = newSVsv (GvSV (irsgv));
		812	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
515		813
516	{	814	{
517	dSP;	815	dSP;
518	LOGOP myop;	816	LOGOP myop;
519		817
520	SvREFCNT_dec (GvAV (PL_defgv));
521	GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523	Zero (&myop, 1, LOGOP);	818	Zero (&myop, 1, LOGOP);
524	myop.op_next = Nullop;	819	myop.op_next = Nullop;
525	myop.op_flags = OPf_WANT_VOID;	820	myop.op_flags = OPf_WANT_VOID;
526		821
527	PUSHMARK (SP);	822	PUSHMARK (SP);
528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	823	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
529	PUTBACK;	824	PUTBACK;
530	PL_op = (OP *)&myop;	825	PL_op = (OP *)&myop;
531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	826	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532	SPAGAIN;	827	SPAGAIN;
533	}	828	}
534		829
535	ENTER; /* necessary e.g. for dounwind */	830	/* this newly created coroutine might be run on an existing cctx which most
		831	* likely was suspended in set_stacklevel, called from entersub.
		832	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		833	* so we ENTER here for symmetry
		834	*/
		835	ENTER;
536	}	836	}
537		837
538	static void	838	static void
		839	coro_destroy (pTHX_ struct coro *coro)
		840	{
		841	if (!IN_DESTRUCT)
		842	{
		843	/* restore all saved variables and stuff */
		844	LEAVE_SCOPE (0);
		845	assert (PL_tmps_floor == -1);
		846
		847	/* free all temporaries */
		848	FREETMPS;
		849	assert (PL_tmps_ix == -1);
		850
		851	/* unwind all extra stacks */
		852	POPSTACK_TO (PL_mainstack);
		853
		854	/* unwind main stack */
		855	dounwind (-1);
		856	}
		857
		858	SvREFCNT_dec (GvSV (PL_defgv));
		859	SvREFCNT_dec (GvAV (PL_defgv));
		860	SvREFCNT_dec (GvSV (PL_errgv));
		861	SvREFCNT_dec (PL_defoutgv);
		862	SvREFCNT_dec (PL_rs);
		863	SvREFCNT_dec (GvSV (irsgv));
		864
		865	SvREFCNT_dec (PL_diehook);
		866	SvREFCNT_dec (PL_warnhook);
		867
		868	SvREFCNT_dec (coro->saved_deffh);
		869	SvREFCNT_dec (coro->throw);
		870
		871	coro_destroy_stacks (aTHX);
		872	}
		873
		874	static void
539	free_coro_mortal ()	875	free_coro_mortal (pTHX)
540	{	876	{
541	if (coro_mortal)	877	if (expect_true (coro_mortal))
542	{	878	{
543	SvREFCNT_dec (coro_mortal);	879	SvREFCNT_dec (coro_mortal);
544	coro_mortal = 0;	880	coro_mortal = 0;
545	}	881	}
546	}	882	}
547		883
		884	static int
		885	runops_trace (pTHX)
		886	{
		887	COP *oldcop = 0;
		888	int oldcxix = -2;
		889	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		890	coro_cctx *cctx = coro->cctx;
		891
		892	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		893	{
		894	PERL_ASYNC_CHECK ();
		895
		896	if (cctx->flags & CC_TRACE_ALL)
		897	{
		898	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		899	{
		900	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		901	SV **bot, **top;
		902	AV *av = newAV (); /* return values */
		903	SV **cb;
		904	dSP;
		905
		906	GV *gv = CvGV (cx->blk_sub.cv);
		907	SV *fullname = sv_2mortal (newSV (0));
		908	if (isGV (gv))
		909	gv_efullname3 (fullname, gv, 0);
		910
		911	bot = PL_stack_base + cx->blk_oldsp + 1;
		912	top = cx->blk_gimme == G_ARRAY ? SP + 1
		913	: cx->blk_gimme == G_SCALAR ? bot + 1
		914	: bot;
		915
		916	av_extend (av, top - bot);
		917	while (bot < top)
		918	av_push (av, SvREFCNT_inc (*bot++));
		919
		920	PL_runops = RUNOPS_DEFAULT;
		921	ENTER;
		922	SAVETMPS;
		923	EXTEND (SP, 3);
		924	PUSHMARK (SP);
		925	PUSHs (&PL_sv_no);
		926	PUSHs (fullname);
		927	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		928	PUTBACK;
		929	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		930	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		931	SPAGAIN;
		932	FREETMPS;
		933	LEAVE;
		934	PL_runops = runops_trace;
		935	}
		936
		937	if (oldcop != PL_curcop)
		938	{
		939	oldcop = PL_curcop;
		940
		941	if (PL_curcop != &PL_compiling)
		942	{
		943	SV **cb;
		944
		945	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		946	{
		947	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		948
		949	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		950	{
		951	runops_proc_t old_runops = PL_runops;
		952	dSP;
		953	GV *gv = CvGV (cx->blk_sub.cv);
		954	SV *fullname = sv_2mortal (newSV (0));
		955
		956	if (isGV (gv))
		957	gv_efullname3 (fullname, gv, 0);
		958
		959	PL_runops = RUNOPS_DEFAULT;
		960	ENTER;
		961	SAVETMPS;
		962	EXTEND (SP, 3);
		963	PUSHMARK (SP);
		964	PUSHs (&PL_sv_yes);
		965	PUSHs (fullname);
		966	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		967	PUTBACK;
		968	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		969	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		970	SPAGAIN;
		971	FREETMPS;
		972	LEAVE;
		973	PL_runops = runops_trace;
		974	}
		975
		976	oldcxix = cxstack_ix;
		977	}
		978
		979	if (cctx->flags & CC_TRACE_LINE)
		980	{
		981	dSP;
		982
		983	PL_runops = RUNOPS_DEFAULT;
		984	ENTER;
		985	SAVETMPS;
		986	EXTEND (SP, 3);
		987	PL_runops = RUNOPS_DEFAULT;
		988	PUSHMARK (SP);
		989	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		990	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		991	PUTBACK;
		992	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		993	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		994	SPAGAIN;
		995	FREETMPS;
		996	LEAVE;
		997	PL_runops = runops_trace;
		998	}
		999	}
		1000	}
		1001	}
		1002	}
		1003
		1004	TAINT_NOT;
		1005	return 0;
		1006	}
		1007
548	/* inject a fake call to Coro::State::_cctx_init into the execution */	1008	/* inject a fake call to Coro::State::_cctx_init into the execution */
		1009	/* _cctx_init should be careful, as it could be called at almost any time */
		1010	/* during execution of a perl program */
549	static void NOINLINE	1011	static void NOINLINE
550	prepare_cctx (coro_cctx *cctx)	1012	cctx_prepare (pTHX_ coro_cctx *cctx)
551	{	1013	{
552	dSP;	1014	dSP;
553	LOGOP myop;	1015	LOGOP myop;
		1016
		1017	PL_top_env = &PL_start_env;
		1018
		1019	if (cctx->flags & CC_TRACE)
		1020	PL_runops = runops_trace;
554		1021
555	Zero (&myop, 1, LOGOP);	1022	Zero (&myop, 1, LOGOP);
556	myop.op_next = PL_op;	1023	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1024	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		1025
…		…
564	PL_op = (OP *)&myop;	1031	PL_op = (OP *)&myop;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1032	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	1033	SPAGAIN;
567	}	1034	}
568		1035
		1036	/*
		1037	* this is a _very_ stripped down perl interpreter ;)
		1038	*/
569	static void	1039	static void
570	coro_run (void *arg)	1040	cctx_run (void *arg)
571	{	1041	{
		1042	dTHX;
		1043
572	/* coro_run is the alternative tail of transfer(), so unlock here. */	1044	/* cctx_run is the alternative tail of transfer(), so unlock here. */
573	UNLOCK;	1045	UNLOCK;
574		1046
575	/*	1047	/* we now skip the entersub that lead to transfer() */
576	* this is a _very_ stripped down perl interpreter ;)	1048	PL_op = PL_op->op_next;
577	*/
578	PL_top_env = &PL_start_env;
579		1049
580	/* inject call to cctx_init */	1050	/* inject a fake subroutine call to cctx_init */
581	prepare_cctx ((coro_cctx *)arg);	1051	cctx_prepare (aTHX_ (coro_cctx *)arg);
582		1052
583	/* somebody will hit me for both perl_run and PL_restartop */	1053	/* somebody or something will hit me for both perl_run and PL_restartop */
584	PL_restartop = PL_op;	1054	PL_restartop = PL_op;
585	perl_run (PL_curinterp);	1055	perl_run (PL_curinterp);
586		1056
587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	1057	/*
588	abort ();	1058	* If perl-run returns we assume exit() was being called or the coro
		1059	* fell off the end, which seems to be the only valid (non-bug)
		1060	* reason for perl_run to return. We try to exit by jumping to the
		1061	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1062	* coroutine as Coro has no such concept
		1063	*/
		1064	PL_top_env = main_top_env;
		1065	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
589	}	1066	}
590		1067
591	static coro_cctx *	1068	static coro_cctx *
592	cctx_new ()	1069	cctx_new ()
593	{	1070	{
594	coro_cctx *cctx;	1071	coro_cctx *cctx;
		1072	void *stack_start;
		1073	size_t stack_size;
595		1074
596	++cctx_count;	1075	++cctx_count;
597		1076
598	Newz (0, cctx, 1, coro_cctx);	1077	Newz (0, cctx, 1, coro_cctx);
599		1078
600	#if HAVE_MMAP	1079	#if HAVE_MMAP
601
602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1080	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
603	/* mmap supposedly does allocate-on-write for us */	1081	/* mmap supposedly does allocate-on-write for us */
604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1082	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605		1083
606	if (cctx->sptr == (void *)-1)	1084	if (cctx->sptr != (void *)-1)
607	{
608	perror ("FATAL: unable to mmap stack for coroutine");
609	_exit (EXIT_FAILURE);
610	}	1085	{
611
612	# if STACKGUARD	1086	# if CORO_STACKGUARD
613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1087	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
614	# endif	1088	# endif
		1089	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1090	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1091	cctx->flags |= CC_MAPPED;
		1092	}
		1093	else
		1094	#endif
		1095	{
		1096	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1097	New (0, cctx->sptr, coro_stacksize, long);
615		1098
616	#else
617
618	cctx->ssize = STACKSIZE * (long)sizeof (long);
619	New (0, cctx->sptr, STACKSIZE, long);
620
621	if (!cctx->sptr)	1099	if (!cctx->sptr)
622	{	1100	{
623	perror ("FATAL: unable to malloc stack for coroutine");	1101	perror ("FATAL: unable to allocate stack for coroutine");
624	_exit (EXIT_FAILURE);	1102	_exit (EXIT_FAILURE);
625	}	1103	}
626		1104
627	#endif	1105	stack_start = cctx->sptr;
		1106	stack_size = cctx->ssize;
		1107	}
628		1108
629	#if USE_VALGRIND	1109	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1110	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632	cctx->ssize + (char *)cctx->sptr
633	);
634	#endif
635
636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
637		1111
638	return cctx;	1112	return cctx;
639	}	1113	}
640		1114
641	static void	1115	static void
…		…
644	if (!cctx)	1118	if (!cctx)
645	return;	1119	return;
646		1120
647	--cctx_count;	1121	--cctx_count;
648		1122
649	#if USE_VALGRIND	1123	#if CORO_USE_VALGRIND
650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1124	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651	#endif	1125	#endif
652		1126
653	#if HAVE_MMAP	1127	#if HAVE_MMAP
		1128	if (cctx->flags & CC_MAPPED)
654	munmap (cctx->sptr, cctx->ssize);	1129	munmap (cctx->sptr, cctx->ssize);
655	#else	1130	else
		1131	#endif
656	Safefree (cctx->sptr);	1132	Safefree (cctx->sptr);
657	#endif
658		1133
659	Safefree (cctx);	1134	Safefree (cctx);
660	}	1135	}
661		1136
		1137	/* wether this cctx should be destructed */
		1138	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1139
662	static coro_cctx *	1140	static coro_cctx *
663	cctx_get ()	1141	cctx_get (pTHX)
664	{	1142	{
665	coro_cctx *cctx;	1143	while (expect_true (cctx_first))
666
667	if (cctx_first)
668	{	1144	{
669	cctx = cctx_first;	1145	coro_cctx *cctx = cctx_first;
670	cctx_first = cctx->next;	1146	cctx_first = cctx->next;
671	--cctx_idle;	1147	--cctx_idle;
672	}	1148
673	else	1149	if (expect_true (!CCTX_EXPIRED (cctx)))
674	{	1150	return cctx;
675	cctx = cctx_new ();	1151
676	PL_op = PL_op->op_next;	1152	cctx_destroy (cctx);
677	}	1153	}
678		1154
679	return cctx;	1155	return cctx_new ();
680	}	1156	}
681		1157
682	static void	1158	static void
683	cctx_put (coro_cctx *cctx)	1159	cctx_put (coro_cctx *cctx)
684	{	1160	{
685	/* free another cctx if overlimit */	1161	/* free another cctx if overlimit */
686	if (cctx_idle >= MAX_IDLE_CCTX)	1162	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
687	{	1163	{
688	coro_cctx *first = cctx_first;	1164	coro_cctx *first = cctx_first;
689	cctx_first = first->next;	1165	cctx_first = first->next;
690	--cctx_idle;	1166	--cctx_idle;
691		1167
692	assert (!first->inuse);
693	cctx_destroy (first);	1168	cctx_destroy (first);
694	}	1169	}
695		1170
696	++cctx_idle;	1171	++cctx_idle;
697	cctx->next = cctx_first;	1172	cctx->next = cctx_first;
698	cctx_first = cctx;	1173	cctx_first = cctx;
699	}	1174	}
700		1175
701	/* never call directly, always through the coro_state_transfer global variable */	1176	/** coroutine switching *****************************************************/
		1177
		1178	static void
		1179	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1180	{
		1181	if (expect_true (prev != next))
		1182	{
		1183	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1184	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1185
		1186	if (expect_false (next->flags & CF_RUNNING))
		1187	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1188
		1189	if (expect_false (next->flags & CF_DESTROYED))
		1190	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1191
		1192	#if !PERL_VERSION_ATLEAST (5,10,0)
		1193	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1194	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1195	#endif
		1196	}
		1197	}
		1198
		1199	/* always use the TRANSFER macro */
702	static void NOINLINE	1200	static void NOINLINE
703	transfer (struct coro *prev, struct coro *next)	1201	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
704	{	1202	{
705	dSTACKLEVEL;	1203	dSTACKLEVEL;
		1204	static volatile int has_throw;
706		1205
707	/* sometimes transfer is only called to set idle_sp */	1206	/* sometimes transfer is only called to set idle_sp */
708	if (!next)	1207	if (expect_false (!next))
709	{	1208	{
710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1209	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
711	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */	1210	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
712	}	1211	}
713	else if (prev != next)	1212	else if (expect_true (prev != next))
714	{	1213	{
715	coro_cctx *prev__cctx;	1214	coro_cctx *prev__cctx;
716		1215
717	if (prev->flags & CF_NEW)	1216	if (expect_false (prev->flags & CF_NEW))
718	{	1217	{
719	/* create a new empty context */	1218	/* create a new empty context */
720	Newz (0, prev->cctx, 1, coro_cctx);	1219	Newz (0, prev->cctx, 1, coro_cctx);
721	prev->cctx->inuse = 1;
722	prev->flags &= ~CF_NEW;	1220	prev->flags &= ~CF_NEW;
723	prev->flags |= CF_RUNNING;	1221	prev->flags |= CF_RUNNING;
724	}	1222	}
725		1223
726	/*TODO: must not croak here */
727	if (!prev->flags & CF_RUNNING)
728	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
729
730	if (next->flags & CF_RUNNING)
731	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
732
733	prev->flags &= ~CF_RUNNING;	1224	prev->flags &= ~CF_RUNNING;
734	next->flags |= CF_RUNNING;	1225	next->flags |= CF_RUNNING;
735		1226
736	LOCK;	1227	LOCK;
737		1228
		1229	/* first get rid of the old state */
		1230	save_perl (aTHX_ prev);
		1231
738	if (next->flags & CF_NEW)	1232	if (expect_false (next->flags & CF_NEW))
739	{	1233	{
740	/* need to start coroutine */	1234	/* need to start coroutine */
741	next->flags &= ~CF_NEW;	1235	next->flags &= ~CF_NEW;
742	/* first get rid of the old state */
743	save_perl (prev);
744	/* setup coroutine call */	1236	/* setup coroutine call */
745	setup_coro (next);	1237	coro_setup (aTHX_ next);
746	/* need a new stack */
747	assert (!next->cctx);
748	}	1238	}
749	else	1239	else
750	{
751	/* coroutine already started */
752	save_perl (prev);
753	load_perl (next);	1240	load_perl (aTHX_ next);
754	}
755		1241
756	prev__cctx = prev->cctx;	1242	prev__cctx = prev->cctx;
757		1243
758	/* possibly "free" the cctx */	1244	/* possibly "free" the cctx */
		1245	if (expect_true (
759	if (prev__cctx->idle_sp == STACKLEVEL)	1246	prev__cctx->idle_sp == STACKLEVEL
		1247	&& !(prev__cctx->flags & CC_TRACE)
		1248	&& !force_cctx
		1249	))
760	{	1250	{
761	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1251	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
762	assert (PL_top_env == prev__cctx->top_env);	1252	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
763		1253
764	prev->cctx = 0;	1254	prev->cctx = 0;
765		1255
		1256	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1257	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1258	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1259	if (!next->cctx)
		1260	next->cctx = cctx_get (aTHX);
		1261
766	cctx_put (prev__cctx);	1262	cctx_put (prev__cctx);
767	prev__cctx->inuse = 0;
768	}	1263	}
769		1264
		1265	++next->usecount;
		1266
770	if (!next->cctx)	1267	if (expect_true (!next->cctx))
771	{
772	next->cctx = cctx_get ();	1268	next->cctx = cctx_get (aTHX);
773	assert (!next->cctx->inuse);
774	next->cctx->inuse = 1;
775	}
776		1269
		1270	has_throw = !!next->throw;
		1271
777	if (prev__cctx != next->cctx)	1272	if (expect_false (prev__cctx != next->cctx))
778	{	1273	{
779	prev__cctx->top_env = PL_top_env;	1274	prev__cctx->top_env = PL_top_env;
780	PL_top_env = next->cctx->top_env;	1275	PL_top_env = next->cctx->top_env;
781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1276	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
782	}	1277	}
783		1278
784	free_coro_mortal ();	1279	free_coro_mortal (aTHX);
785
786	UNLOCK;	1280	UNLOCK;
		1281
		1282	if (expect_false (has_throw))
		1283	{
		1284	struct coro *coro = SvSTATE (coro_current);
		1285
		1286	if (coro->throw)
		1287	{
		1288	SV *exception = coro->throw;
		1289	coro->throw = 0;
		1290	sv_setsv (ERRSV, exception);
		1291	croak (0);
		1292	}
		1293	}
787	}	1294	}
788	}	1295	}
789		1296
790	struct transfer_args	1297	struct transfer_args
791	{	1298	{
792	struct coro *prev, *next;	1299	struct coro *prev, *next;
793	};	1300	};
794		1301
		1302	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
795	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1303	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
796		1304
		1305	/** high level stuff ********************************************************/
		1306
797	static void	1307	static int
798	coro_state_destroy (struct coro *coro)	1308	coro_state_destroy (pTHX_ struct coro *coro)
799	{	1309	{
800	if (coro->refcnt--)	1310	if (coro->flags & CF_DESTROYED)
801	return;	1311	return 0;
		1312
		1313	coro->flags |= CF_DESTROYED;
		1314
		1315	if (coro->flags & CF_READY)
		1316	{
		1317	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1318	/* alternative: look through all ready queues and remove the coro */
		1319	LOCK;
		1320	--coro_nready;
		1321	UNLOCK;
		1322	}
		1323	else
		1324	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
802		1325
803	if (coro->mainstack && coro->mainstack != main_mainstack)	1326	if (coro->mainstack && coro->mainstack != main_mainstack)
804	{	1327	{
805	struct coro temp;	1328	struct coro temp;
806	Zero (&temp, 1, struct coro);
807	temp.save = CORO_SAVE_ALL;
808		1329
809	if (coro->flags & CF_RUNNING)	1330	if (coro->flags & CF_RUNNING)
810	croak ("FATAL: tried to destroy currently running coroutine");	1331	croak ("FATAL: tried to destroy currently running coroutine");
811		1332
812	save_perl (&temp);	1333	save_perl (aTHX_ &temp);
813	load_perl (coro);	1334	load_perl (aTHX_ coro);
814		1335
815	coro_destroy_stacks ();	1336	coro_destroy (aTHX_ coro);
816		1337
817	load_perl (&temp); /* this will get rid of defsv etc.. */	1338	load_perl (aTHX_ &temp);
818		1339
819	coro->mainstack = 0;	1340	coro->slot = 0;
820	}	1341	}
821		1342
822	cctx_destroy (coro->cctx);	1343	cctx_destroy (coro->cctx);
823	SvREFCNT_dec (coro->args);	1344	SvREFCNT_dec (coro->args);
824	Safefree (coro);	1345
		1346	if (coro->next) coro->next->prev = coro->prev;
		1347	if (coro->prev) coro->prev->next = coro->next;
		1348	if (coro == coro_first) coro_first = coro->next;
		1349
		1350	return 1;
825	}	1351	}
826		1352
827	static int	1353	static int
828	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1354	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
829	{	1355	{
830	struct coro *coro = (struct coro *)mg->mg_ptr;	1356	struct coro *coro = (struct coro *)mg->mg_ptr;
831	mg->mg_ptr = 0;	1357	mg->mg_ptr = 0;
832		1358
		1359	coro->hv = 0;
		1360
		1361	if (--coro->refcnt < 0)
		1362	{
833	coro_state_destroy (coro);	1363	coro_state_destroy (aTHX_ coro);
		1364	Safefree (coro);
		1365	}
834		1366
835	return 0;	1367	return 0;
836	}	1368	}
837		1369
838	static int	1370	static int
…		…
845	return 0;	1377	return 0;
846	}	1378	}
847		1379
848	static MGVTBL coro_state_vtbl = {	1380	static MGVTBL coro_state_vtbl = {
849	0, 0, 0, 0,	1381	0, 0, 0, 0,
850	coro_state_clear,	1382	coro_state_free,
851	0,	1383	0,
852	#ifdef MGf_DUP	1384	#ifdef MGf_DUP
853	coro_state_dup,	1385	coro_state_dup,
854	#else	1386	#else
855	# define MGf_DUP 0	1387	# define MGf_DUP 0
856	#endif	1388	#endif
857	};	1389	};
858		1390
859	static struct coro *
860	SvSTATE (SV *coro)
861	{
862	HV *stash;
863	MAGIC *mg;
864
865	if (SvROK (coro))
866	coro = SvRV (coro);
867
868	stash = SvSTASH (coro);
869	if (stash != coro_stash && stash != coro_state_stash)
870	{
871	/* very slow, but rare, check */
872	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
873	croak ("Coro::State object required");
874	}
875
876	mg = SvMAGIC (coro);
877	assert (mg->mg_type == PERL_MAGIC_ext);
878	return (struct coro *)mg->mg_ptr;
879	}
880
881	static void	1391	static void
882	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1392	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
883	{	1393	{
884	ta->prev = SvSTATE (prev_sv);	1394	ta->prev = SvSTATE (prev_sv);
885	ta->next = SvSTATE (next_sv);	1395	ta->next = SvSTATE (next_sv);
		1396	TRANSFER_CHECK (*ta);
886	}	1397	}
887		1398
888	static void	1399	static void
889	api_transfer (SV *prev_sv, SV *next_sv)	1400	api_transfer (SV *prev_sv, SV *next_sv)
890	{	1401	{
		1402	dTHX;
891	struct transfer_args ta;	1403	struct transfer_args ta;
892		1404
893	prepare_transfer (&ta, prev_sv, next_sv);	1405	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
894	TRANSFER (ta);	1406	TRANSFER (ta, 1);
895	}
896
897	static int
898	api_save (SV *coro_sv, int new_save)
899	{
900	struct coro *coro = SvSTATE (coro_sv);
901	int old_save = coro->save;
902
903	if (new_save >= 0)
904	coro->save = new_save;
905
906	return old_save;
907	}	1407	}
908		1408
909	/** Coro ********************************************************************/	1409	/** Coro ********************************************************************/
910		1410
911	#define PRIO_MAX 3
912	#define PRIO_HIGH 1
913	#define PRIO_NORMAL 0
914	#define PRIO_LOW -1
915	#define PRIO_IDLE -3
916	#define PRIO_MIN -4
917
918	/* for Coro.pm */
919	static SV *coro_current;
920	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
921	static int coro_nready;
922
923	static void	1411	static void
924	coro_enq (SV *coro_sv)	1412	coro_enq (pTHX_ SV *coro_sv)
925	{	1413	{
926	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1414	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
927	coro_nready++;
928	}	1415	}
929		1416
930	static SV *	1417	static SV *
931	coro_deq (int min_prio)	1418	coro_deq (pTHX)
932	{	1419	{
933	int prio = PRIO_MAX - PRIO_MIN;	1420	int prio;
934		1421
935	min_prio -= PRIO_MIN;
936	if (min_prio < 0)
937	min_prio = 0;
938
939	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1422	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
940	if (AvFILLp (coro_ready [prio]) >= 0)	1423	if (AvFILLp (coro_ready [prio]) >= 0)
941	{
942	coro_nready--;
943	return av_shift (coro_ready [prio]);	1424	return av_shift (coro_ready [prio]);
944	}
945		1425
946	return 0;	1426	return 0;
947	}	1427	}
948		1428
949	static int	1429	static int
950	api_ready (SV *coro_sv)	1430	api_ready (SV *coro_sv)
951	{	1431	{
		1432	dTHX;
952	struct coro *coro;	1433	struct coro *coro;
		1434	SV *sv_hook;
		1435	void (*xs_hook)(void);
953		1436
954	if (SvROK (coro_sv))	1437	if (SvROK (coro_sv))
955	coro_sv = SvRV (coro_sv);	1438	coro_sv = SvRV (coro_sv);
956		1439
957	coro = SvSTATE (coro_sv);	1440	coro = SvSTATE (coro_sv);
…		…
960	return 0;	1443	return 0;
961		1444
962	coro->flags |= CF_READY;	1445	coro->flags |= CF_READY;
963		1446
964	LOCK;	1447	LOCK;
		1448
		1449	sv_hook = coro_nready ? 0 : coro_readyhook;
		1450	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1451
965	coro_enq (SvREFCNT_inc (coro_sv));	1452	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1453	++coro_nready;
		1454
966	UNLOCK;	1455	UNLOCK;
		1456
		1457	if (sv_hook)
		1458	{
		1459	dSP;
		1460
		1461	ENTER;
		1462	SAVETMPS;
		1463
		1464	PUSHMARK (SP);
		1465	PUTBACK;
		1466	call_sv (sv_hook, G_DISCARD);
		1467	SPAGAIN;
		1468
		1469	FREETMPS;
		1470	LEAVE;
		1471	}
		1472
		1473	if (xs_hook)
		1474	xs_hook ();
967		1475
968	return 1;	1476	return 1;
969	}	1477	}
970		1478
971	static int	1479	static int
972	api_is_ready (SV *coro_sv)	1480	api_is_ready (SV *coro_sv)
973	{	1481	{
		1482	dTHX;
974	return !!SvSTATE (coro_sv)->flags & CF_READY;	1483	return !!(SvSTATE (coro_sv)->flags & CF_READY);
975	}	1484	}
976		1485
977	static void	1486	static void
978	prepare_schedule (struct transfer_args *ta)	1487	prepare_schedule (pTHX_ struct transfer_args *ta)
979	{	1488	{
980	SV *prev, *next;	1489	SV *prev_sv, *next_sv;
981		1490
982	for (;;)	1491	for (;;)
983	{	1492	{
984	LOCK;	1493	LOCK;
985	next = coro_deq (PRIO_MIN);	1494	next_sv = coro_deq (aTHX);
		1495
		1496	/* nothing to schedule: call the idle handler */
		1497	if (expect_false (!next_sv))
		1498	{
		1499	dSP;
		1500	UNLOCK;
		1501
		1502	ENTER;
		1503	SAVETMPS;
		1504
		1505	PUSHMARK (SP);
		1506	PUTBACK;
		1507	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1508	SPAGAIN;
		1509
		1510	FREETMPS;
		1511	LEAVE;
		1512	continue;
		1513	}
		1514
		1515	ta->next = SvSTATE (next_sv);
		1516
		1517	/* cannot transfer to destroyed coros, skip and look for next */
		1518	if (expect_false (ta->next->flags & CF_DESTROYED))
		1519	{
		1520	UNLOCK;
		1521	SvREFCNT_dec (next_sv);
		1522	/* coro_nready is already taken care of by destroy */
		1523	continue;
		1524	}
		1525
		1526	--coro_nready;
986	UNLOCK;	1527	UNLOCK;
987
988	if (next)
989	break;	1528	break;
990
991	{
992	dSP;
993
994	ENTER;
995	SAVETMPS;
996
997	PUSHMARK (SP);
998	PUTBACK;
999	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1000
1001	FREETMPS;
1002	LEAVE;
1003	}	1529	}
1004	}
1005
1006	prev = SvRV (coro_current);
1007	SvRV_set (coro_current, next);
1008		1530
1009	/* free this only after the transfer */	1531	/* free this only after the transfer */
1010	LOCK;	1532	prev_sv = SvRV (coro_current);
1011	free_coro_mortal ();
1012	UNLOCK;
1013	coro_mortal = prev;
1014
1015	assert (!SvROK(prev));//D
1016	assert (!SvROK(next));//D
1017
1018	ta->prev = SvSTATE (prev);	1533	ta->prev = SvSTATE (prev_sv);
1019	ta->next = SvSTATE (next);	1534	TRANSFER_CHECK (*ta);
1020
1021	assert (ta->next->flags & CF_READY);	1535	assert (ta->next->flags & CF_READY);
1022	ta->next->flags &= ~CF_READY;	1536	ta->next->flags &= ~CF_READY;
		1537	SvRV_set (coro_current, next_sv);
		1538
		1539	LOCK;
		1540	free_coro_mortal (aTHX);
		1541	coro_mortal = prev_sv;
		1542	UNLOCK;
1023	}	1543	}
1024		1544
1025	static void	1545	static void
1026	prepare_cede (struct transfer_args *ta)	1546	prepare_cede (pTHX_ struct transfer_args *ta)
1027	{	1547	{
1028	api_ready (coro_current);	1548	api_ready (coro_current);
1029
1030	prepare_schedule (ta);	1549	prepare_schedule (aTHX_ ta);
		1550	}
		1551
		1552	static int
		1553	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1554	{
		1555	if (coro_nready)
		1556	{
		1557	SV *prev = SvRV (coro_current);
		1558	prepare_schedule (aTHX_ ta);
		1559	api_ready (prev);
		1560	return 1;
		1561	}
		1562	else
		1563	return 0;
1031	}	1564	}
1032		1565
1033	static void	1566	static void
1034	api_schedule (void)	1567	api_schedule (void)
1035	{	1568	{
		1569	dTHX;
1036	struct transfer_args ta;	1570	struct transfer_args ta;
1037		1571
1038	prepare_schedule (&ta);	1572	prepare_schedule (aTHX_ &ta);
1039	TRANSFER (ta);	1573	TRANSFER (ta, 1);
		1574	}
		1575
		1576	static int
		1577	api_cede (void)
		1578	{
		1579	dTHX;
		1580	struct transfer_args ta;
		1581
		1582	prepare_cede (aTHX_ &ta);
		1583
		1584	if (expect_true (ta.prev != ta.next))
		1585	{
		1586	TRANSFER (ta, 1);
		1587	return 1;
		1588	}
		1589	else
		1590	return 0;
		1591	}
		1592
		1593	static int
		1594	api_cede_notself (void)
		1595	{
		1596	dTHX;
		1597	struct transfer_args ta;
		1598
		1599	if (prepare_cede_notself (aTHX_ &ta))
		1600	{
		1601	TRANSFER (ta, 1);
		1602	return 1;
		1603	}
		1604	else
		1605	return 0;
1040	}	1606	}
1041		1607
1042	static void	1608	static void
1043	api_cede (void)	1609	api_trace (SV *coro_sv, int flags)
1044	{	1610	{
1045	struct transfer_args ta;	1611	dTHX;
		1612	struct coro *coro = SvSTATE (coro_sv);
1046		1613
1047	prepare_cede (&ta);	1614	if (flags & CC_TRACE)
1048	TRANSFER (ta);	1615	{
1049	}	1616	if (!coro->cctx)
		1617	coro->cctx = cctx_new ();
		1618	else if (!(coro->cctx->flags & CC_TRACE))
		1619	croak ("cannot enable tracing on coroutine with custom stack");
1050		1620
		1621	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1622	}
		1623	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1624	{
		1625	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1626
		1627	if (coro->flags & CF_RUNNING)
		1628	PL_runops = RUNOPS_DEFAULT;
		1629	else
		1630	coro->slot->runops = RUNOPS_DEFAULT;
		1631	}
		1632	}
		1633
		1634	static int
		1635	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
		1636	{
		1637	AV *padlist;
		1638	AV *av = (AV *)mg->mg_obj;
		1639
		1640	abort ();
		1641
		1642	return 0;
		1643	}
		1644
		1645	static MGVTBL coro_gensub_vtbl = {
		1646	0, 0, 0, 0,
		1647	coro_gensub_free
		1648	};
		1649
1051	MODULE = Coro::State PACKAGE = Coro::State	1650	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1052		1651
1053	PROTOTYPES: DISABLE	1652	PROTOTYPES: DISABLE
1054		1653
1055	BOOT:	1654	BOOT:
1056	{	1655	{
1057	#ifdef USE_ITHREADS	1656	#ifdef USE_ITHREADS
1058	MUTEX_INIT (&coro_mutex);	1657	MUTEX_INIT (&coro_mutex);
1059	#endif	1658	#endif
1060	BOOT_PAGESIZE;	1659	BOOT_PAGESIZE;
1061		1660
		1661	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1662	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1663
		1664	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1665	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1666	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1667
		1668	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1669	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1670	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1671
1062	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1672	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1063		1673
		1674	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1675	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1064	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1676	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1065	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1066	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1067	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1068	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1677	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1069		1678
1070	main_mainstack = PL_mainstack;	1679	main_mainstack = PL_mainstack;
		1680	main_top_env = PL_top_env;
1071		1681
		1682	while (main_top_env->je_prev)
		1683	main_top_env = main_top_env->je_prev;
		1684
1072	coroapi.ver = CORO_API_VERSION;	1685	coroapi.ver = CORO_API_VERSION;
		1686	coroapi.rev = CORO_API_REVISION;
1073	coroapi.transfer = api_transfer;	1687	coroapi.transfer = api_transfer;
1074		1688
1075	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1689	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1076	}	1690	}
1077		1691
1078	SV *	1692	SV *
1079	new (char *klass, ...)	1693	new (char *klass, ...)
1080	CODE:	1694	CODE:
1081	{	1695	{
1082	struct coro *coro;	1696	struct coro *coro;
		1697	MAGIC *mg;
1083	HV *hv;	1698	HV *hv;
1084	int i;	1699	int i;
1085		1700
1086	Newz (0, coro, 1, struct coro);	1701	Newz (0, coro, 1, struct coro);
1087	coro->args = newAV ();	1702	coro->args = newAV ();
1088	coro->save = CORO_SAVE_ALL;
1089	coro->flags = CF_NEW;	1703	coro->flags = CF_NEW;
1090		1704
		1705	if (coro_first) coro_first->prev = coro;
		1706	coro->next = coro_first;
		1707	coro_first = coro;
		1708
1091	hv = newHV ();	1709	coro->hv = hv = newHV ();
1092	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1710	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1711	mg->mg_flags |= MGf_DUP;
1093	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1712	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1094		1713
		1714	av_extend (coro->args, items - 1);
1095	for (i = 1; i < items; i++)	1715	for (i = 1; i < items; i++)
1096	av_push (coro->args, newSVsv (ST (i)));	1716	av_push (coro->args, newSVsv (ST (i)));
1097	}	1717	}
1098	OUTPUT:	1718	OUTPUT:
1099	RETVAL	1719	RETVAL
1100		1720
1101	int	1721	# these not obviously related functions are all rolled into the same xs
1102	save (SV *coro, int new_save = -1)	1722	# function to increase chances that they all will call transfer with the same
1103	CODE:	1723	# stack offset
1104	RETVAL = api_save (coro, new_save);
1105	OUTPUT:
1106	RETVAL
1107
1108	void	1724	void
1109	_set_stacklevel (...)	1725	_set_stacklevel (...)
1110	ALIAS:	1726	ALIAS:
1111	Coro::State::transfer = 1	1727	Coro::State::transfer = 1
1112	Coro::schedule = 2	1728	Coro::schedule = 2
1113	Coro::cede = 3	1729	Coro::cede = 3
		1730	Coro::cede_notself = 4
1114	CODE:	1731	CODE:
1115	{	1732	{
1116	struct transfer_args ta;	1733	struct transfer_args ta;
1117		1734
		1735	PUTBACK;
1118	switch (ix)	1736	switch (ix)
1119	{	1737	{
1120	case 0:	1738	case 0:
1121	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1739	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1122	ta.next = 0;	1740	ta.next = 0;
…		…
1124		1742
1125	case 1:	1743	case 1:
1126	if (items != 2)	1744	if (items != 2)
1127	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1745	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1128		1746
1129	prepare_transfer (&ta, ST (0), ST (1));	1747	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1130	break;	1748	break;
1131		1749
1132	case 2:	1750	case 2:
1133	prepare_schedule (&ta);	1751	prepare_schedule (aTHX_ &ta);
1134	break;	1752	break;
1135		1753
1136	case 3:	1754	case 3:
1137	prepare_cede (&ta);	1755	prepare_cede (aTHX_ &ta);
		1756	break;
		1757
		1758	case 4:
		1759	if (!prepare_cede_notself (aTHX_ &ta))
		1760	XSRETURN_EMPTY;
		1761
1138	break;	1762	break;
1139	}	1763	}
		1764	SPAGAIN;
1140		1765
		1766	BARRIER;
		1767	PUTBACK;
1141	TRANSFER (ta);	1768	TRANSFER (ta, 0);
		1769	SPAGAIN; /* might be the sp of a different coroutine now */
		1770	/* be extra careful not to ever do anything after TRANSFER */
1142	}	1771	}
		1772
		1773	bool
		1774	_destroy (SV *coro_sv)
		1775	CODE:
		1776	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1777	OUTPUT:
		1778	RETVAL
1143		1779
1144	void	1780	void
1145	_clone_state_from (SV *dst, SV *src)
1146	CODE:
1147	{
1148	struct coro *coro_src = SvSTATE (src);
1149
1150	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1151
1152	++coro_src->refcnt;
1153	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1154	}
1155
1156	void
1157	_exit (code)	1781	_exit (int code)
1158	int code
1159	PROTOTYPE: $	1782	PROTOTYPE: $
1160	CODE:	1783	CODE:
1161	_exit (code);	1784	_exit (code);
		1785
		1786	int
		1787	cctx_stacksize (int new_stacksize = 0)
		1788	CODE:
		1789	RETVAL = coro_stacksize;
		1790	if (new_stacksize)
		1791	coro_stacksize = new_stacksize;
		1792	OUTPUT:
		1793	RETVAL
1162		1794
1163	int	1795	int
1164	cctx_count ()	1796	cctx_count ()
1165	CODE:	1797	CODE:
1166	RETVAL = cctx_count;	1798	RETVAL = cctx_count;
…		…
1172	CODE:	1804	CODE:
1173	RETVAL = cctx_idle;	1805	RETVAL = cctx_idle;
1174	OUTPUT:	1806	OUTPUT:
1175	RETVAL	1807	RETVAL
1176		1808
		1809	void
		1810	list ()
		1811	PPCODE:
		1812	{
		1813	struct coro *coro;
		1814	for (coro = coro_first; coro; coro = coro->next)
		1815	if (coro->hv)
		1816	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1817	}
		1818
		1819	void
		1820	call (Coro::State coro, SV *coderef)
		1821	ALIAS:
		1822	eval = 1
		1823	CODE:
		1824	{
		1825	if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
		1826	{
		1827	struct coro temp;
		1828
		1829	if (!(coro->flags & CF_RUNNING))
		1830	{
		1831	PUTBACK;
		1832	save_perl (aTHX_ &temp);
		1833	load_perl (aTHX_ coro);
		1834	}
		1835
		1836	{
		1837	dSP;
		1838	ENTER;
		1839	SAVETMPS;
		1840	PUTBACK;
		1841	PUSHSTACK;
		1842	PUSHMARK (SP);
		1843
		1844	if (ix)
		1845	eval_sv (coderef, 0);
		1846	else
		1847	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1848
		1849	POPSTACK;
		1850	SPAGAIN;
		1851	FREETMPS;
		1852	LEAVE;
		1853	PUTBACK;
		1854	}
		1855
		1856	if (!(coro->flags & CF_RUNNING))
		1857	{
		1858	save_perl (aTHX_ coro);
		1859	load_perl (aTHX_ &temp);
		1860	SPAGAIN;
		1861	}
		1862	}
		1863	}
		1864
		1865	SV *
		1866	is_ready (Coro::State coro)
		1867	PROTOTYPE: $
		1868	ALIAS:
		1869	is_ready = CF_READY
		1870	is_running = CF_RUNNING
		1871	is_new = CF_NEW
		1872	is_destroyed = CF_DESTROYED
		1873	CODE:
		1874	RETVAL = boolSV (coro->flags & ix);
		1875	OUTPUT:
		1876	RETVAL
		1877
		1878	void
		1879	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1880
		1881	SV *
		1882	has_cctx (Coro::State coro)
		1883	PROTOTYPE: $
		1884	CODE:
		1885	RETVAL = boolSV (!!coro->cctx);
		1886	OUTPUT:
		1887	RETVAL
		1888
		1889	int
		1890	is_traced (Coro::State coro)
		1891	PROTOTYPE: $
		1892	CODE:
		1893	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1894	OUTPUT:
		1895	RETVAL
		1896
		1897	IV
		1898	rss (Coro::State coro)
		1899	PROTOTYPE: $
		1900	ALIAS:
		1901	usecount = 1
		1902	CODE:
		1903	switch (ix)
		1904	{
		1905	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1906	case 1: RETVAL = coro->usecount; break;
		1907	}
		1908	OUTPUT:
		1909	RETVAL
		1910
		1911	void
		1912	force_cctx ()
		1913	CODE:
		1914	struct coro *coro = SvSTATE (coro_current);
		1915	coro->cctx->idle_sp = 0;
		1916
		1917	void
		1918	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1919	PROTOTYPE: $;$
		1920	CODE:
		1921	SvREFCNT_dec (self->throw);
		1922	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1923
		1924	void
		1925	swap_defsv (Coro::State self)
		1926	PROTOTYPE: $
		1927	ALIAS:
		1928	swap_defav = 1
		1929	CODE:
		1930	if (!self->slot)
		1931	croak ("cannot swap state with coroutine that has no saved state");
		1932	else
		1933	{
		1934	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1935	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1936
		1937	SV *tmp = *src; *src = *dst; *dst = tmp;
		1938	}
		1939
1177	MODULE = Coro::State PACKAGE = Coro	1940	MODULE = Coro::State PACKAGE = Coro
1178		1941
1179	BOOT:	1942	BOOT:
1180	{	1943	{
1181	int i;	1944	int i;
1182		1945
		1946	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1947	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1948	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1949
		1950	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1951	SvREADONLY_on (coro_current);
		1952
1183	coro_stash = gv_stashpv ("Coro", TRUE);	1953	coro_stash = gv_stashpv ("Coro", TRUE);
1184		1954
1185	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1955	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1186	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1956	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1187	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1957	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1188	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1958	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1189	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1959	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1190	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1960	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1191		1961
1192	coro_current = get_sv ("Coro::current", FALSE);
1193	SvREADONLY_on (coro_current);
1194
1195	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1962	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1196	coro_ready[i] = newAV ();	1963	coro_ready[i] = newAV ();
1197		1964
1198	{	1965	{
1199	SV *sv = perl_get_sv("Coro::API", 1);	1966	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1967	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1200		1968
1201	coroapi.schedule = api_schedule;	1969	coroapi.schedule = api_schedule;
1202	coroapi.save = api_save;
1203	coroapi.cede = api_cede;	1970	coroapi.cede = api_cede;
		1971	coroapi.cede_notself = api_cede_notself;
1204	coroapi.ready = api_ready;	1972	coroapi.ready = api_ready;
1205	coroapi.is_ready = api_is_ready;	1973	coroapi.is_ready = api_is_ready;
1206	coroapi.nready = &coro_nready;	1974	coroapi.nready = &coro_nready;
1207	coroapi.current = coro_current;	1975	coroapi.current = coro_current;
1208		1976
1209	GCoroAPI = &coroapi;	1977	GCoroAPI = &coroapi;
1210	sv_setiv (sv, (IV)&coroapi);	1978	sv_setiv (sv, (IV)&coroapi);
1211	SvREADONLY_on (sv);	1979	SvREADONLY_on (sv);
1212	}	1980	}
…		…
1217	PROTOTYPE: $	1985	PROTOTYPE: $
1218	CODE:	1986	CODE:
1219	SvREFCNT_dec (SvRV (coro_current));	1987	SvREFCNT_dec (SvRV (coro_current));
1220	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1988	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1221		1989
		1990	void
		1991	_set_readyhook (SV *hook)
		1992	PROTOTYPE: $
		1993	CODE:
		1994	LOCK;
		1995	SvREFCNT_dec (coro_readyhook);
		1996	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1997	UNLOCK;
		1998
1222	int	1999	int
1223	prio (Coro::State coro, int newprio = 0)	2000	prio (Coro::State coro, int newprio = 0)
1224	ALIAS:	2001	ALIAS:
1225	nice = 1	2002	nice = 1
1226	CODE:	2003	CODE:
…		…
1228	RETVAL = coro->prio;	2005	RETVAL = coro->prio;
1229		2006
1230	if (items > 1)	2007	if (items > 1)
1231	{	2008	{
1232	if (ix)	2009	if (ix)
1233	newprio += coro->prio;	2010	newprio = coro->prio - newprio;
1234		2011
1235	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	2012	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1236	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	2013	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1237		2014
1238	coro->prio = newprio;	2015	coro->prio = newprio;
1239	}	2016	}
1240	}	2017	}
		2018	OUTPUT:
		2019	RETVAL
1241		2020
1242	SV *	2021	SV *
1243	ready (SV *self)	2022	ready (SV *self)
1244	PROTOTYPE: $	2023	PROTOTYPE: $
1245	CODE:	2024	CODE:
1246	RETVAL = boolSV (api_ready (self));	2025	RETVAL = boolSV (api_ready (self));
1247	OUTPUT:	2026	OUTPUT:
1248	RETVAL	2027	RETVAL
1249		2028
1250	SV *
1251	is_ready (SV *self)
1252	PROTOTYPE: $
1253	CODE:
1254	RETVAL = boolSV (api_is_ready (self));
1255	OUTPUT:
1256	RETVAL
1257
1258	int	2029	int
1259	nready (...)	2030	nready (...)
1260	PROTOTYPE:	2031	PROTOTYPE:
1261	CODE:	2032	CODE:
1262	RETVAL = coro_nready;	2033	RETVAL = coro_nready;
1263	OUTPUT:	2034	OUTPUT:
1264	RETVAL	2035	RETVAL
1265		2036
		2037	# for async_pool speedup
		2038	void
		2039	_pool_1 (SV *cb)
		2040	CODE:
		2041	{
		2042	struct coro *coro = SvSTATE (coro_current);
		2043	HV *hv = (HV *)SvRV (coro_current);
		2044	AV *defav = GvAV (PL_defgv);
		2045	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2046	AV *invoke_av;
		2047	int i, len;
		2048
		2049	if (!invoke)
		2050	{
		2051	SV *old = PL_diehook;
		2052	PL_diehook = 0;
		2053	SvREFCNT_dec (old);
		2054	croak ("\3async_pool terminate\2\n");
		2055	}
		2056
		2057	SvREFCNT_dec (coro->saved_deffh);
		2058	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2059
		2060	hv_store (hv, "desc", sizeof ("desc") - 1,
		2061	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2062
		2063	invoke_av = (AV *)SvRV (invoke);
		2064	len = av_len (invoke_av);
		2065
		2066	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2067
		2068	if (len > 0)
		2069	{
		2070	av_fill (defav, len - 1);
		2071	for (i = 0; i < len; ++i)
		2072	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2073	}
		2074
		2075	SvREFCNT_dec (invoke);
		2076	}
		2077
		2078	void
		2079	_pool_2 (SV *cb)
		2080	CODE:
		2081	{
		2082	struct coro *coro = SvSTATE (coro_current);
		2083
		2084	sv_setsv (cb, &PL_sv_undef);
		2085
		2086	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		2087	coro->saved_deffh = 0;
		2088
		2089	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2090	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2091	{
		2092	SV *old = PL_diehook;
		2093	PL_diehook = 0;
		2094	SvREFCNT_dec (old);
		2095	croak ("\3async_pool terminate\2\n");
		2096	}
		2097
		2098	av_clear (GvAV (PL_defgv));
		2099	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2100	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2101
		2102	coro->prio = 0;
		2103
		2104	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2105	api_trace (coro_current, 0);
		2106
		2107	av_push (av_async_pool, newSVsv (coro_current));
		2108	}
		2109
		2110	#if 0
		2111
		2112	void
		2113	_generator_call (...)
		2114	PROTOTYPE: @
		2115	PPCODE:
		2116	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
		2117	xxxx
		2118	abort ();
		2119
		2120	SV *
		2121	gensub (SV *sub, ...)
		2122	PROTOTYPE: &;@
		2123	CODE:
		2124	{
		2125	struct coro *coro;
		2126	MAGIC *mg;
		2127	CV *xcv;
		2128	CV *ncv = (CV *)newSV_type (SVt_PVCV);
		2129	int i;
		2130
		2131	CvGV (ncv) = CvGV (cv);
		2132	CvFILE (ncv) = CvFILE (cv);
		2133
		2134	Newz (0, coro, 1, struct coro);
		2135	coro->args = newAV ();
		2136	coro->flags = CF_NEW;
		2137
		2138	av_extend (coro->args, items - 1);
		2139	for (i = 1; i < items; i++)
		2140	av_push (coro->args, newSVsv (ST (i)));
		2141
		2142	CvISXSUB_on (ncv);
		2143	CvXSUBANY (ncv).any_ptr = (void *)coro;
		2144
		2145	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
		2146
		2147	CvXSUB (ncv) = CvXSUB (xcv);
		2148	CvANON_on (ncv);
		2149
		2150	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
		2151	RETVAL = newRV_noinc ((SV *)ncv);
		2152	}
		2153	OUTPUT:
		2154	RETVAL
		2155
		2156	#endif
		2157
		2158
1266	MODULE = Coro::State PACKAGE = Coro::AIO	2159	MODULE = Coro::State PACKAGE = Coro::AIO
1267		2160
1268	SV *	2161	SV *
1269	_get_state ()	2162	_get_state ()
1270	CODE:	2163	CODE:
…		…
1295	PL_laststype = data->laststype;	2188	PL_laststype = data->laststype;
1296	PL_laststatval = data->laststatval;	2189	PL_laststatval = data->laststatval;
1297	PL_statcache = data->statcache;	2190	PL_statcache = data->statcache;
1298	}	2191	}
1299		2192
		2193
		2194	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2195
		2196	BOOT:
		2197	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2198
		2199	SV *
		2200	_schedule (...)
		2201	PROTOTYPE: @
		2202	CODE:
		2203	{
		2204	static int incede;
		2205
		2206	api_cede_notself ();
		2207
		2208	++incede;
		2209	while (coro_nready >= incede && api_cede ())
		2210	;
		2211
		2212	sv_setsv (sv_activity, &PL_sv_undef);
		2213	if (coro_nready >= incede)
		2214	{
		2215	PUSHMARK (SP);
		2216	PUTBACK;
		2217	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
		2218	SPAGAIN;
		2219	}
		2220
		2221	--incede;
		2222	}
		2223

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