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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.96 by root, Sun Nov 26 18:25:11 2006 UTC vs.
Revision 1.200 by root, Sun Oct 7 15:08:23 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef HAVE_MMAP
		17	# include <unistd.h>
		18	# include <sys/mman.h>
		19	# ifndef MAP_ANONYMOUS
		20	# ifdef MAP_ANON
		21	# define MAP_ANONYMOUS MAP_ANON
		22	# else
		23	# undef HAVE_MMAP
		24	# endif
		25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
		33	# endif
		34	#else
		35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
		38
		39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	|| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	56	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	57	# define PL_ppaddr ppaddr
14	# endif	58	# endif
15	# ifndef call_sv	59	# ifndef call_sv
16	# define call_sv perl_call_sv	60	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	71	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	72	# define IS_PADCONST(v) 0
29	# endif	73	# endif
30	#endif	74	#endif
31		75
32	#include <stdio.h>	76	/* 5.8.7 */
33	#include <errno.h>	77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
34		88
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	90	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	91	#endif
53	# include <limits.h>	92
54	# ifndef PAGESIZE	93	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	94	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	95	#endif
61	#endif
62		96
63	/* The next macro should declare a variable stacklevel that contains and approximation	97	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	98	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
68		106
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		108
		109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
		123
71	#include "CoroAPI.h"	124	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		125
75	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	130	#else
80	# define LOCK (void)0	131	# define LOCK (void)0
81	# define UNLOCK (void)0	132	# define UNLOCK (void)0
82	#endif	133	#endif
83		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
		138	struct io_state
		139	{
		140	int errorno;
		141	I32 laststype;
		142	int laststatval;
		143	Stat_t statcache;
		144	};
		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	148	static AV *main_mainstack; /* used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	150	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	151	static SV *coro_mortal; /* will be freed after next transfer */
88		152
		153	static GV *irsgv; /* $/ */
		154	static GV *stdoutgv; /* *STDOUT */
		155
		156	static HV *hv_sig; /* %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
		165	static struct coro_cctx *cctx_first;
		166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		175	};
		176
89	/* this is a structure representing a c-level coroutine */	177	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	178	typedef struct coro_cctx {
91	struct coro_stack *next;	179	struct coro_cctx *next;
92		180
93	/* the stack */	181	/* the stack */
94	void *sptr;	182	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	183	size_t ssize;
96		184
97	/* cpu state */	185	/* cpu state */
98	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	186	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		187	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	188	JMPENV *top_env;
100	coro_context cctx;	189	coro_context cctx;
101	} coro_stack;	190
		191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
		196
		197	enum {
		198	CF_RUNNING = 0x0001, /* coroutine is running */
		199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		205	typedef struct {
		206	SV *defsv;
		207	AV *defav;
		208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
		214
		215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102		216
103	/* this is a structure representing a perl-level coroutine */	217	/* this is a structure representing a perl-level coroutine */
104	struct coro {	218	struct coro {
105	/* the c coroutine allocated to this perl coroutine, if any */	219	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	220	coro_cctx *cctx;
		221
		222	/* process data */
		223	AV *mainstack;
		224	perl_slots *slot; /* basically the saved sp */
107		225
108	/* data associated with this coroutine (initial args) */	226	/* data associated with this coroutine (initial args) */
109	AV *args;	227	AV *args;
110	int refcnt;	228	int refcnt;
		229	int flags; /* CF_ flags */
111		230
112	/* optionally saved, might be zero */	231	/* statistics */
113	AV *defav;	232	int usecount; /* number of transfers to this coro */
114	SV *defsv;
115	SV *errsv;
116
117	/* saved global state not related to stacks */
118	U8 dowarn;
119	I32 in_eval;
120
121	/* the stacks and related info (callchain etc..) */
122	PERL_SI *curstackinfo;
123	AV *curstack;
124	AV *mainstack;
125	SV **stack_sp;
126	OP *op;
127	SV **curpad;
128	AV *comppad;
129	CV *compcv;
130	SV **stack_base;
131	SV **stack_max;
132	SV **tmps_stack;
133	I32 tmps_floor;
134	I32 tmps_ix;
135	I32 tmps_max;
136	I32 *markstack;
137	I32 *markstack_ptr;
138	I32 *markstack_max;
139	I32 *scopestack;
140	I32 scopestack_ix;
141	I32 scopestack_max;
142	ANY *savestack;
143	I32 savestack_ix;
144	I32 savestack_max;
145	OP **retstack;
146	I32 retstack_ix;
147	I32 retstack_max;
148	PMOP *curpm;
149	COP *curcop;
150		233
151	/* coro process data */	234	/* coro process data */
152	int prio;	235	int prio;
		236	SV *throw;
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
		243	HV *hv; /* the perl hash associated with this coro, if any */
153	};	244	};
154		245
155	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
157		248
		249	/** Coro ********************************************************************/
		250
		251	#define PRIO_MAX 3
		252	#define PRIO_HIGH 1
		253	#define PRIO_NORMAL 0
		254	#define PRIO_LOW -1
		255	#define PRIO_IDLE -3
		256	#define PRIO_MIN -4
		257
		258	/* for Coro.pm */
		259	static SV *coro_current;
		260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		261	static int coro_nready;
		262	static struct coro *coro_first;
		263
		264	/** lowlevel stuff **********************************************************/
		265
		266	static SV *
		267	coro_get_sv (const char *name, int create)
		268	{
		269	#if PERL_VERSION_ATLEAST (5,9,0)
		270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		271	get_sv (name, create);
		272	#endif
		273	return get_sv (name, create);
		274	}
		275
		276	static AV *
		277	coro_get_av (const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,9,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_av (name, create);
		282	#endif
		283	return get_av (name, create);
		284	}
		285
		286	static HV *
		287	coro_get_hv (const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,9,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_hv (name, create);
		292	#endif
		293	return get_hv (name, create);
		294	}
		295
158	static AV *	296	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	297	coro_clone_padlist (pTHX_ CV *cv)
160	{	298	{
161	AV *padlist = CvPADLIST (cv);	299	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	300	AV *newpadlist, *newpad;
163		301
164	newpadlist = newAV ();	302	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	303	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	304	#if PERL_VERSION_ATLEAST (5,9,0)
		305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		306	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	308	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	309	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	310	--AvFILLp (padlist);
173		311
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	312	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		356
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		358
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		360
		361	#define CORO_MAGIC(cv) \
		362	SvMAGIC (cv) \
		363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		364	? SvMAGIC (cv) \
		365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		366	: 0
		367
		368	static struct coro *
		369	SvSTATE_ (pTHX_ SV *coro)
		370	{
		371	HV *stash;
		372	MAGIC *mg;
		373
		374	if (SvROK (coro))
		375	coro = SvRV (coro);
		376
		377	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		378	croak ("Coro::State object required");
		379
		380	stash = SvSTASH (coro);
		381	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		382	{
		383	/* very slow, but rare, check */
		384	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		385	croak ("Coro::State object required");
		386	}
		387
		388	mg = CORO_MAGIC (coro);
		389	return (struct coro *)mg->mg_ptr;
		390	}
		391
		392	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		393
223	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
224	static void	395	static void
225	get_padlist (pTHX_ CV *cv)	396	get_padlist (pTHX_ CV *cv)
226	{	397	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
228		400
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	403	else
232	{	404	{
233	#if 0	405	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this is probably cleaner, but also slower? */	406	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	407	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	408	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	409	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	410	SvREFCNT_dec (cp);
239	#else	411	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	415	}
244		416
245	static void	417	static void
246	put_padlist (pTHX_ CV *cv)	418	put_padlist (pTHX_ CV *cv)
247	{	419	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	420	MAGIC *mg = CORO_MAGIC (cv);
		421	AV *av;
249		422
250	if (!mg)	423	if (expect_false (!mg))
251	{	424	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
256	}	429	}
257		430
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	431	av = (AV *)mg->mg_obj;
259	}
260		432
261	#define SB do {	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	434	av_extend (av, AvMAX (av) + 1);
263		435
264	#define LOAD(state) load_state(aTHX_ (state));	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	437	}
266		438
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	439	/** load & save, init *******************************************************/
268		440
269	static void	441	static void
270	load_state(pTHX_ Coro__State c)	442	load_perl (pTHX_ Coro__State c)
271	{	443	{
272	PL_dowarn = c->dowarn;	444	perl_slots *slot = c->slot;
273	PL_in_eval = c->in_eval;	445	c->slot = 0;
274		446
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;	447	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		448
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	449	GvSV (PL_defgv) = slot->defsv;
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	450	GvAV (PL_defgv) = slot->defav;
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	451	GvSV (PL_errgv) = slot->errsv;
		452	GvSV (irsgv) = slot->irsgv;
		453
		454	#define VAR(name,type) PL_ ## name = slot->name;
		455	# include "state.h"
		456	#undef VAR
309		457
310	{	458	{
311	dSP;	459	dSP;
		460
312	CV *cv;	461	CV *cv;
313		462
314	/* now do the ugly restore mess */	463	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	464	while (expect_true (cv = (CV *)POPs))
316	{	465	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	466	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	467	CvDEPTH (cv) = PTR2IV (POPs);
323	}	468	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	469	}
327		470
328	PUTBACK;	471	PUTBACK;
329	}	472	}
330	}	473	}
331		474
332	static void	475	static void
333	save_state(pTHX_ Coro__State c, int flags)	476	save_perl (pTHX_ Coro__State c)
334	{	477	{
335	{	478	{
336	dSP;	479	dSP;
337	I32 cxix = cxstack_ix;	480	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	481	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	484	/*
342	* the worst thing you can imagine happens first - we have to save	485	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	486	* (and reinitialize) all cv's in the whole callchain :(
344	*/	487	*/
345		488
346	PUSHs (Nullsv);	489	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	490	/* this loop was inspired by pp_caller */
348	for (;;)	491	for (;;)
349	{	492	{
350	while (cxix >= 0)	493	while (expect_true (cxix >= 0))
351	{	494	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	495	PERL_CONTEXT *cx = &ccstk[cxix--];
353		496
354	if (CxTYPE(cx) == CXt_SUB)	497	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355	{	498	{
356	CV *cv = cx->blk_sub.cv;	499	CV *cv = cx->blk_sub.cv;
		500
357	if (CvDEPTH(cv))	501	if (expect_true (CvDEPTH (cv)))
358	{	502	{
359	EXTEND (SP, CvDEPTH(cv)*2);	503	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	504	PUSHs ((SV *)CvPADLIST (cv));
		505	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	506	PUSHs ((SV *)cv);
370		507
		508	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	509	get_padlist (aTHX_ cv);
372	}	510	}
373	}	511	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	512	}
383		513
384	if (top_si->si_type == PERLSI_MAIN)	514	if (expect_true (top_si->si_type == PERLSI_MAIN))
385	break;	515	break;
386		516
387	top_si = top_si->si_prev;	517	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	518	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	519	cxix = top_si->si_cxix;
390	}	520	}
391		521
392	PUTBACK;	522	PUTBACK;
393	}	523	}
394		524
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	525	/* allocate some space on the context stack for our purposes */
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	526	{
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	527	/* we manually unroll here, as usually 2 slots is enough */
		528	int i;
		529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	for (i = 3; i < SLOT_COUNT; ++i)
		533	CXINC;
398		534
399	c->dowarn = PL_dowarn;	535	cxstack_ix -= SLOT_COUNT; /* undo allocation */
400	c->in_eval = PL_in_eval;	536	}
401		537
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;	538	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;	539
406	c->op = PL_op;	540	{
407	c->curpad = PL_curpad;	541	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408	c->comppad = PL_comppad;	542
409	c->compcv = PL_compcv;	543	slot->defav = GvAV (PL_defgv);
410	c->stack_base = PL_stack_base;	544	slot->defsv = DEFSV;
411	c->stack_max = PL_stack_max;	545	slot->errsv = ERRSV;
412	c->tmps_stack = PL_tmps_stack;	546	slot->irsgv = GvSV (irsgv);
413	c->tmps_floor = PL_tmps_floor;	547
414	c->tmps_ix = PL_tmps_ix;	548	#define VAR(name,type) slot->name = PL_ ## name;
415	c->tmps_max = PL_tmps_max;	549	# include "state.h"
416	c->markstack = PL_markstack;	550	#undef VAR
417	c->markstack_ptr = PL_markstack_ptr;	551	}
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	}	552	}
433		553
434	/*	554	/*
435	* allocate various perl stacks. This is an exact copy	555	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	556	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	557	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	558	* not usually need a lot of stackspace.
439	*/	559	*/
		560	#if CORO_PREFER_PERL_FUNCTIONS
		561	# define coro_init_stacks init_stacks
		562	#else
440	static void	563	static void
441	coro_init_stacks (pTHX)	564	coro_init_stacks (pTHX)
442	{	565	{
443	LOCK;	566	PL_curstackinfo = new_stackinfo(32, 8);
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446	PL_curstackinfo->si_type = PERLSI_MAIN;	567	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	568	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	569	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		570
450	PL_stack_base = AvARRAY(PL_curstack);	571	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	572	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	573	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		574
454	New(50,PL_tmps_stack,96,SV*);	575	New(50,PL_tmps_stack,32,SV*);
455	PL_tmps_floor = -1;	576	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	577	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	578	PL_tmps_max = 32;
458		579
459	New(54,PL_markstack,16,I32);	580	New(54,PL_markstack,16,I32);
460	PL_markstack_ptr = PL_markstack;	581	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	582	PL_markstack_max = PL_markstack + 16;
462		583
463	#ifdef SET_MARK_OFFSET	584	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	585	SET_MARK_OFFSET;
465	#endif	586	#endif
466		587
467	New(54,PL_scopestack,16,I32);	588	New(54,PL_scopestack,8,I32);
468	PL_scopestack_ix = 0;	589	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	590	PL_scopestack_max = 8;
470		591
471	New(54,PL_savestack,96,ANY);	592	New(54,PL_savestack,24,ANY);
472	PL_savestack_ix = 0;	593	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	594	PL_savestack_max = 24;
474		595
475	#if PERL_VERSION < 9	596	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	597	New(54,PL_retstack,4,OP*);
477	PL_retstack_ix = 0;	598	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	599	PL_retstack_max = 4;
479	#endif	600	#endif
480
481	UNLOCK;
482	}	601	}
		602	#endif
483		603
484	/*	604	/*
485	* destroy the stacks, the callchain etc...	605	* destroy the stacks, the callchain etc...
486	*/	606	*/
487	static void	607	static void
488	destroy_stacks(pTHX)	608	coro_destroy_stacks (pTHX)
489	{	609	{
490	if (!IN_DESTRUCT)
491	{
492	/* is this ugly, I ask? */
493	LEAVE_SCOPE (0);
494
495	/* sure it is, but more important: is it correct?? :/ */
496	FREETMPS;
497
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499	}
500
501	while (PL_curstackinfo->si_next)	610	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	611	PL_curstackinfo = PL_curstackinfo->si_next;
503		612
504	while (PL_curstackinfo)	613	while (PL_curstackinfo)
505	{	614	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	615	PERL_SI *p = PL_curstackinfo->si_prev;
507		616
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	617	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	618	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		619
520	Safefree (PL_curstackinfo->si_cxstack);	620	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	621	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	622	PL_curstackinfo = p;
523	}	623	}
524		624
525	Safefree (PL_tmps_stack);	625	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	626	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	627	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	628	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	629	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	630	Safefree (PL_retstack);
531	#endif	631	#endif
532	}	632	}
533		633
534	static void	634	static size_t
535	setup_coro (struct coro *coro)	635	coro_rss (pTHX_ struct coro *coro)
		636	{
		637	size_t rss = sizeof (*coro);
		638
		639	if (coro->mainstack)
		640	{
		641	perl_slots tmp_slot;
		642	perl_slots *slot;
		643
		644	if (coro->flags & CF_RUNNING)
		645	{
		646	slot = &tmp_slot;
		647
		648	#define VAR(name,type) slot->name = PL_ ## name;
		649	# include "state.h"
		650	#undef VAR
		651	}
		652	else
		653	slot = coro->slot;
		654
		655	rss += sizeof (slot->curstackinfo);
		656	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		657	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		658	rss += slot->tmps_max * sizeof (SV *);
		659	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		660	rss += slot->scopestack_max * sizeof (I32);
		661	rss += slot->savestack_max * sizeof (ANY);
		662
		663	#if !PERL_VERSION_ATLEAST (5,9,0)
		664	rss += slot->retstack_max * sizeof (OP *);
		665	#endif
		666	}
		667
		668	return rss;
		669	}
		670
		671	/** coroutine stack handling ************************************************/
		672
		673	static void
		674	coro_setup (pTHX_ struct coro *coro)
536	{	675	{
537	/*	676	/*
538	* emulate part of the perl startup here.	677	* emulate part of the perl startup here.
539	*/	678	*/
540	dTHX;	679	coro_init_stacks (aTHX);
		680
		681	PL_runops = RUNOPS_DEFAULT;
		682	PL_curcop = &PL_compiling;
		683	PL_in_eval = EVAL_NULL;
		684	PL_comppad = 0;
		685	PL_curpm = 0;
		686	PL_curpad = 0;
		687	PL_localizing = 0;
		688	PL_dirty = 0;
		689	PL_restartop = 0;
		690	SvREFCNT_inc (PL_diehook ); hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		691	SvREFCNT_inc (PL_warnhook); hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		692
		693	GvSV (PL_defgv) = newSV (0);
		694	GvAV (PL_defgv) = coro->args; coro->args = 0;
		695	GvSV (PL_errgv) = newSV (0);
		696	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		697	PL_rs = newSVsv (GvSV (irsgv));
		698	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		699
		700	{
		701	dSP;
		702	LOGOP myop;
		703
		704	Zero (&myop, 1, LOGOP);
		705	myop.op_next = Nullop;
		706	myop.op_flags = OPf_WANT_VOID;
		707
		708	PUSHMARK (SP);
		709	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		710	PUTBACK;
		711	PL_op = (OP *)&myop;
		712	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		713	SPAGAIN;
		714	}
		715
		716	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		717	}
		718
		719	static void
		720	coro_destroy (pTHX_ struct coro *coro)
		721	{
		722	if (!IN_DESTRUCT)
		723	{
		724	/* restore all saved variables and stuff */
		725	LEAVE_SCOPE (0);
		726	assert (PL_tmps_floor == -1);
		727
		728	/* free all temporaries */
		729	FREETMPS;
		730	assert (PL_tmps_ix == -1);
		731
		732	/* unwind all extra stacks */
		733	POPSTACK_TO (PL_mainstack);
		734
		735	/* unwind main stack */
		736	dounwind (-1);
		737	}
		738
		739	SvREFCNT_dec (GvSV (PL_defgv));
		740	SvREFCNT_dec (GvAV (PL_defgv));
		741	SvREFCNT_dec (GvSV (PL_errgv));
		742	SvREFCNT_dec (PL_defoutgv);
		743	SvREFCNT_dec (PL_rs);
		744	SvREFCNT_dec (GvSV (irsgv));
		745
		746	SvREFCNT_dec (PL_diehook);
		747	SvREFCNT_dec (PL_warnhook);
		748
		749	SvREFCNT_dec (coro->saved_deffh);
		750	SvREFCNT_dec (coro->throw);
		751
		752	coro_destroy_stacks (aTHX);
		753	}
		754
		755	static void
		756	free_coro_mortal (pTHX)
		757	{
		758	if (expect_true (coro_mortal))
		759	{
		760	SvREFCNT_dec (coro_mortal);
		761	coro_mortal = 0;
		762	}
		763	}
		764
		765	static int
		766	runops_trace (pTHX)
		767	{
		768	COP *oldcop = 0;
		769	int oldcxix = -2;
		770	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		771	coro_cctx *cctx = coro->cctx;
		772
		773	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		774	{
		775	PERL_ASYNC_CHECK ();
		776
		777	if (cctx->flags & CC_TRACE_ALL)
		778	{
		779	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		780	{
		781	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		782	SV **bot, **top;
		783	AV *av = newAV (); /* return values */
		784	SV **cb;
		785	dSP;
		786
		787	GV *gv = CvGV (cx->blk_sub.cv);
		788	SV *fullname = sv_2mortal (newSV (0));
		789	if (isGV (gv))
		790	gv_efullname3 (fullname, gv, 0);
		791
		792	bot = PL_stack_base + cx->blk_oldsp + 1;
		793	top = cx->blk_gimme == G_ARRAY ? SP + 1
		794	: cx->blk_gimme == G_SCALAR ? bot + 1
		795	: bot;
		796
		797	av_extend (av, top - bot);
		798	while (bot < top)
		799	av_push (av, SvREFCNT_inc (*bot++));
		800
		801	PL_runops = RUNOPS_DEFAULT;
		802	ENTER;
		803	SAVETMPS;
		804	EXTEND (SP, 3);
		805	PUSHMARK (SP);
		806	PUSHs (&PL_sv_no);
		807	PUSHs (fullname);
		808	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		809	PUTBACK;
		810	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		811	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		812	SPAGAIN;
		813	FREETMPS;
		814	LEAVE;
		815	PL_runops = runops_trace;
		816	}
		817
		818	if (oldcop != PL_curcop)
		819	{
		820	oldcop = PL_curcop;
		821
		822	if (PL_curcop != &PL_compiling)
		823	{
		824	SV **cb;
		825
		826	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		827	{
		828	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		829
		830	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		831	{
		832	runops_proc_t old_runops = PL_runops;
		833	dSP;
		834	GV *gv = CvGV (cx->blk_sub.cv);
		835	SV *fullname = sv_2mortal (newSV (0));
		836
		837	if (isGV (gv))
		838	gv_efullname3 (fullname, gv, 0);
		839
		840	PL_runops = RUNOPS_DEFAULT;
		841	ENTER;
		842	SAVETMPS;
		843	EXTEND (SP, 3);
		844	PUSHMARK (SP);
		845	PUSHs (&PL_sv_yes);
		846	PUSHs (fullname);
		847	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		848	PUTBACK;
		849	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		850	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		851	SPAGAIN;
		852	FREETMPS;
		853	LEAVE;
		854	PL_runops = runops_trace;
		855	}
		856
		857	oldcxix = cxstack_ix;
		858	}
		859
		860	if (cctx->flags & CC_TRACE_LINE)
		861	{
		862	dSP;
		863
		864	PL_runops = RUNOPS_DEFAULT;
		865	ENTER;
		866	SAVETMPS;
		867	EXTEND (SP, 3);
		868	PL_runops = RUNOPS_DEFAULT;
		869	PUSHMARK (SP);
		870	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		871	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		872	PUTBACK;
		873	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		874	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		875	SPAGAIN;
		876	FREETMPS;
		877	LEAVE;
		878	PL_runops = runops_trace;
		879	}
		880	}
		881	}
		882	}
		883	}
		884
		885	TAINT_NOT;
		886	return 0;
		887	}
		888
		889	/* inject a fake call to Coro::State::_cctx_init into the execution */
		890	/* _cctx_init should be careful, as it could be called at almost any time */
		891	/* during execution of a perl program */
		892	static void NOINLINE
		893	prepare_cctx (pTHX_ coro_cctx *cctx)
		894	{
541	dSP;	895	dSP;
542	UNOP myop;	896	LOGOP myop;
543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544		897
545	coro_init_stacks (aTHX);	898	PL_top_env = &PL_start_env;
546	/*PL_curcop = 0;*/
547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
548	SvREFCNT_dec (GvAV (PL_defgv));
549	GvAV (PL_defgv) = coro->args; coro->args = 0;
550		899
551	SPAGAIN;	900	if (cctx->flags & CC_TRACE)
		901	PL_runops = runops_trace;
552		902
553	Zero (&myop, 1, UNOP);	903	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	904	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	905	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556		906
		907	PUSHMARK (SP);
		908	EXTEND (SP, 2);
		909	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		910	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		911	PUTBACK;
557	PL_op = (OP *)&myop;	912	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	913	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	914	SPAGAIN;
564
565	ENTER; /* necessary e.g. for dounwind */
566	}	915	}
567		916
568	static void	917	/*
569	free_coro_mortal ()	918	* this is a _very_ stripped down perl interpreter ;)
570	{	919	*/
571	if (coro_mortal)
572	{
573	SvREFCNT_dec (coro_mortal);
574	coro_mortal = 0;
575	}
576	}
577
578	static void	920	static void
579	coro_run (void *arg)	921	coro_run (void *arg)
580	{	922	{
		923	dTHX;
		924
		925	/* coro_run is the alternative tail of transfer(), so unlock here. */
		926	UNLOCK;
		927
		928	/* we now skip the entersub that lead to transfer() */
		929	PL_op = PL_op->op_next;
		930
		931	/* inject a fake subroutine call to cctx_init */
		932	prepare_cctx (aTHX_ (coro_cctx *)arg);
		933
		934	/* somebody or something will hit me for both perl_run and PL_restartop */
		935	PL_restartop = PL_op;
		936	perl_run (PL_curinterp);
		937
581	/*	938	/*
582	* this is a _very_ stripped down perl interpreter ;)	939	* If perl-run returns we assume exit() was being called or the coro
		940	* fell off the end, which seems to be the only valid (non-bug)
		941	* reason for perl_run to return. We try to exit by jumping to the
		942	* bootstrap-time "top" top_env, as we cannot restore the "main"
		943	* coroutine as Coro has no such concept
583	*/	944	*/
584	dTHX;
585	int ret;
586
587	UNLOCK;
588
589	PL_top_env = &PL_start_env;	945	PL_top_env = main_top_env;
590		946	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
591	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
592	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
593
594	/* continue at cctx_init, without entersub */
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restartop */
598	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
599	printf ("ret %d\n", ret);//D
600
601	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
602	abort ();
603	}	947	}
604		948
605	static coro_stack *	949	static coro_cctx *
606	stack_new ()	950	cctx_new ()
607	{	951	{
608	coro_stack *stack;	952	coro_cctx *cctx;
		953	void *stack_start;
		954	size_t stack_size;
609		955
		956	++cctx_count;
		957
610	New (0, stack, 1, coro_stack);	958	Newz (0, cctx, 1, coro_cctx);
611		959
612	#if HAVE_MMAP	960	#if HAVE_MMAP
613		961
614	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
615	/* mmap suppsedly does allocate-on-write for us */	963	/* mmap supposedly does allocate-on-write for us */
616	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617		965
618	if (stack->sptr == (void *)-1)	966	if (cctx->sptr != (void *)-1)
619	{
620	perror ("FATAL: unable to mmap stack for coroutine");
621	_exit (EXIT_FAILURE);
622	}	967	{
623
624	# if STACKGUARD	968	# if CORO_STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
626	# endif	970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags |= CC_MAPPED;
		974	}
		975	else
		976	#endif
		977	{
		978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
627		980
		981	if (!cctx->sptr)
		982	{
		983	perror ("FATAL: unable to allocate stack for coroutine");
		984	_exit (EXIT_FAILURE);
		985	}
		986
		987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
		990
		991	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		992	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		993
		994	return cctx;
		995	}
		996
		997	static void
		998	cctx_destroy (coro_cctx *cctx)
		999	{
		1000	if (!cctx)
		1001	return;
		1002
		1003	--cctx_count;
		1004
		1005	#if CORO_USE_VALGRIND
		1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1007	#endif
		1008
		1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
		1011	munmap (cctx->sptr, cctx->ssize);
		1012	else
		1013	#endif
		1014	Safefree (cctx->sptr);
		1015
		1016	Safefree (cctx);
		1017	}
		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1021
		1022	static coro_cctx *
		1023	cctx_get (pTHX)
		1024	{
		1025	while (expect_true (cctx_first))
		1026	{
		1027	coro_cctx *cctx = cctx_first;
		1028	cctx_first = cctx->next;
		1029	--cctx_idle;
		1030
		1031	if (expect_true (!CCTX_EXPIRED (cctx)))
		1032	return cctx;
		1033
		1034	cctx_destroy (cctx);
		1035	}
		1036
		1037	return cctx_new ();
		1038	}
		1039
		1040	static void
		1041	cctx_put (coro_cctx *cctx)
		1042	{
		1043	/* free another cctx if overlimit */
		1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1045	{
		1046	coro_cctx *first = cctx_first;
		1047	cctx_first = first->next;
		1048	--cctx_idle;
		1049
		1050	cctx_destroy (first);
		1051	}
		1052
		1053	++cctx_idle;
		1054	cctx->next = cctx_first;
		1055	cctx_first = cctx;
		1056	}
		1057
		1058	/** coroutine switching *****************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
628	#else	1077	#else
629		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
630	stack->ssize = STACKSIZE * (long)sizeof (long);
631	New (0, stack->sptr, STACKSIZE, long);
632
633	if (!stack->sptr)
634	{
635	perror (stderr, "FATAL: unable to malloc stack for coroutine");
636	_exit (EXIT_FAILURE);
637	}
638
639	#endif	1079	#endif
640		1080	)
641	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
642
643	return stack;
644	}
645
646	static void
647	stack_free (coro_stack *stack)
648	{
649	if (!stack)
650	return;
651
652	#if HAVE_MMAP
653	munmap (stack->sptr, stack->ssize);
654	#else
655	Safefree (stack->sptr);
656	#endif
657
658	Safefree (stack);
659	}
660
661	static coro_stack *stack_first;
662
663	static coro_stack *
664	stack_get ()
665	{
666	coro_stack *stack;
667
668	if (stack_first)
669	{
670	stack = stack_first;
671	stack_first = stack->next;
672	}
673	else
674	{
675	stack = stack_new ();
676	PL_op = PL_op->op_next;
677	}	1082	}
678
679	return stack;
680	}	1083	}
681		1084
682	static void	1085	/* always use the TRANSFER macro */
683	stack_put (coro_stack *stack)	1086	static void NOINLINE
684	{
685	stack->next = stack_first;
686	stack_first = stack;
687	}
688
689	/* never call directly, always through the coro_state_transfer global variable */
690	static void
691	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1087	transfer (pTHX_ struct coro *prev, struct coro *next)
692	{	1088	{
693	dSTACKLEVEL;	1089	dSTACKLEVEL;
694		1090
695	/* sometimes transfer is only called to set idle_sp */	1091	/* sometimes transfer is only called to set idle_sp */
696	if (flags == TRANSFER_SET_STACKLEVEL)	1092	if (expect_false (!next))
		1093	{
697	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
698	else if (prev != next)	1095	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
699	{	1096	}
		1097	else if (expect_true (prev != next))
		1098	{
700	coro_stack *prev__stack;	1099	coro_cctx *prev__cctx;
		1100
		1101	if (expect_false (prev->flags & CF_NEW))
		1102	{
		1103	/* create a new empty context */
		1104	Newz (0, prev->cctx, 1, coro_cctx);
		1105	prev->flags &= ~CF_NEW;
		1106	prev->flags |= CF_RUNNING;
		1107	}
		1108
		1109	prev->flags &= ~CF_RUNNING;
		1110	next->flags |= CF_RUNNING;
701		1111
702	LOCK;	1112	LOCK;
703		1113
704	if (next->mainstack)	1114	if (expect_false (next->flags & CF_NEW))
705	{	1115	{
706	/* coroutine already started */	1116	/* need to start coroutine */
707	SAVE (prev, flags);	1117	next->flags &= ~CF_NEW;
708	LOAD (next);	1118	/* first get rid of the old state */
		1119	save_perl (aTHX_ prev);
		1120	/* setup coroutine call */
		1121	coro_setup (aTHX_ next);
709	}	1122	}
710	else	1123	else
711	{	1124	{
712	/* need to start coroutine */	1125	/* coroutine already started */
713	/* first get rid of the old state */	1126	save_perl (aTHX_ prev);
714	SAVE (prev, -1);	1127	load_perl (aTHX_ next);
715	/* setup coroutine call */
716	setup_coro (next);
717	/* need a stack */
718	next->stack = 0;
719	}	1128	}
720		1129
721	if (!prev->stack)
722	/* create a new empty context */
723	Newz (0, prev->stack, 1, coro_stack);
724
725	prev__stack = prev->stack;	1130	prev__cctx = prev->cctx;
726		1131
727	/* possibly "free" the stack */	1132	/* possibly "free" the cctx */
728	if (prev__stack->idle_sp == STACKLEVEL)	1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
729	{	1134	{
730	stack_put (prev__stack);	1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1137
731	prev->stack = 0;	1138	prev->cctx = 0;
		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	next->cctx = cctx_get (aTHX);
		1144
		1145	cctx_put (prev__cctx);
732	}	1146	}
733		1147
734	if (!next->stack)	1148	++next->usecount;
735	next->stack = stack_get ();
736		1149
737	if (prev__stack != next->stack)	1150	if (expect_true (!next->cctx))
		1151	next->cctx = cctx_get (aTHX);
		1152
		1153	if (expect_false (prev__cctx != next->cctx))
738	{	1154	{
739	prev__stack->top_env = PL_top_env;	1155	prev__cctx->top_env = PL_top_env;
740	PL_top_env = next->stack->top_env;	1156	PL_top_env = next->cctx->top_env;
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1157	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742	}	1158	}
743		1159
744	free_coro_mortal ();	1160	free_coro_mortal (aTHX);
745
746	UNLOCK;	1161	UNLOCK;
747	}
748	}
749		1162
750	/* use this function pointer to call the above function */	1163	if (expect_false (prev->throw || next->throw))
751	/* this is done to increase chances of the compiler not inlining the call */	1164	{
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */	1165	struct coro *coro = SvSTATE (coro_current);
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1166
		1167	if (coro->throw)
		1168	{
		1169	SV *exception = coro->throw;
		1170	coro->throw = 0;
		1171	sv_setsv (ERRSV, exception);
		1172	croak (0);
		1173	}
		1174	}
		1175	}
		1176	}
754		1177
755	struct transfer_args	1178	struct transfer_args
756	{	1179	{
757	struct coro *prev, *next;	1180	struct coro *prev, *next;
758	int flags;
759	};	1181	};
760		1182
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1183	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1184	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
762		1185
		1186	/** high level stuff ********************************************************/
		1187
763	static void	1188	static int
764	coro_state_destroy (struct coro *coro)	1189	coro_state_destroy (pTHX_ struct coro *coro)
765	{	1190	{
766	if (coro->refcnt--)	1191	if (coro->flags & CF_DESTROYED)
767	return;	1192	return 0;
		1193
		1194	coro->flags |= CF_DESTROYED;
		1195
		1196	if (coro->flags & CF_READY)
		1197	{
		1198	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1199	/* alternative: look through all ready queues and remove the coro */
		1200	LOCK;
		1201	--coro_nready;
		1202	UNLOCK;
		1203	}
		1204	else
		1205	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768		1206
769	if (coro->mainstack && coro->mainstack != main_mainstack)	1207	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	1208	{
771	struct coro temp;	1209	struct coro temp;
772		1210
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1211	if (coro->flags & CF_RUNNING)
		1212	croak ("FATAL: tried to destroy currently running coroutine");
		1213
		1214	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	1215	load_perl (aTHX_ coro);
775		1216
776	destroy_stacks (aTHX);	1217	coro_destroy (aTHX_ coro);
777		1218
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1219	load_perl (aTHX_ &temp);
779		1220
780	coro->mainstack = 0;	1221	coro->slot = 0;
781	}	1222	}
782		1223
783	stack_free (coro->stack);	1224	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	1225	SvREFCNT_dec (coro->args);
785	Safefree (coro);	1226
		1227	if (coro->next) coro->next->prev = coro->prev;
		1228	if (coro->prev) coro->prev->next = coro->next;
		1229	if (coro == coro_first) coro_first = coro->next;
		1230
		1231	return 1;
786	}	1232	}
787		1233
788	static int	1234	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	1235	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	1236	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	1237	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	1238	mg->mg_ptr = 0;
793		1239
		1240	coro->hv = 0;
		1241
		1242	if (--coro->refcnt < 0)
		1243	{
794	coro_state_destroy (coro);	1244	coro_state_destroy (aTHX_ coro);
		1245	Safefree (coro);
		1246	}
795		1247
796	return 0;	1248	return 0;
797	}	1249	}
798		1250
799	static int	1251	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1252	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	1253	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	1254	struct coro *coro = (struct coro *)mg->mg_ptr;
803		1255
804	++coro->refcnt;	1256	++coro->refcnt;
805		1257
806	return 0;	1258	return 0;
807	}	1259	}
808		1260
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1261	static MGVTBL coro_state_vtbl = {
		1262	0, 0, 0, 0,
		1263	coro_state_free,
		1264	0,
		1265	#ifdef MGf_DUP
		1266	coro_state_dup,
		1267	#else
		1268	# define MGf_DUP 0
		1269	#endif
		1270	};
810		1271
811	static struct coro *
812	SvSTATE (SV *coro)
813	{
814	HV *stash;
815	MAGIC *mg;
816
817	if (SvROK (coro))
818	coro = SvRV (coro);
819
820	stash = SvSTASH (coro);
821	if (stash != coro_stash && stash != coro_state_stash)
822	{
823	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");
826	}
827
828	mg = SvMAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;
831	}
832
833	static void	1272	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1273	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	1274	{
836	ta->prev = SvSTATE (prev);	1275	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	1276	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;	1277	TRANSFER_CHECK (*ta);
839	}	1278	}
840		1279
841	static void	1280	static void
842	api_transfer (SV *prev, SV *next, int flags)	1281	api_transfer (SV *prev_sv, SV *next_sv)
843	{	1282	{
844	dTHX;	1283	dTHX;
845	struct transfer_args ta;	1284	struct transfer_args ta;
846		1285
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	1286	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	1287	TRANSFER (ta);
849	}	1288	}
850		1289
851	/** Coro ********************************************************************/	1290	/** Coro ********************************************************************/
852		1291
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	1292	static void
866	coro_enq (pTHX_ SV *sv)	1293	coro_enq (pTHX_ SV *coro_sv)
867	{	1294	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	1295	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	1296	}
878		1297
879	static SV *	1298	static SV *
880	coro_deq (pTHX_ int min_prio)	1299	coro_deq (pTHX_ int min_prio)
881	{	1300	{
…		…
885	if (min_prio < 0)	1304	if (min_prio < 0)
886	min_prio = 0;	1305	min_prio = 0;
887		1306
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1307	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1308	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1309	return av_shift (coro_ready [prio]);
893	}
894		1310
895	return 0;	1311	return 0;
896	}	1312	}
897		1313
898	static void	1314	static int
899	api_ready (SV *coro)	1315	api_ready (SV *coro_sv)
900	{	1316	{
901	dTHX;	1317	dTHX;
		1318	struct coro *coro;
902		1319
903	if (SvROK (coro))	1320	if (SvROK (coro_sv))
904	coro = SvRV (coro);	1321	coro_sv = SvRV (coro_sv);
		1322
		1323	coro = SvSTATE (coro_sv);
		1324
		1325	if (coro->flags & CF_READY)
		1326	return 0;
		1327
		1328	coro->flags |= CF_READY;
905		1329
906	LOCK;	1330	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1331	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1332	++coro_nready;
908	UNLOCK;	1333	UNLOCK;
909	}
910		1334
		1335	return 1;
		1336	}
		1337
911	static void	1338	static int
		1339	api_is_ready (SV *coro_sv)
		1340	{
		1341	dTHX;
		1342	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1343	}
		1344
		1345	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	1346	prepare_schedule (pTHX_ struct transfer_args *ta)
913	{	1347	{
914	SV *current, *prev, *next;	1348	SV *prev_sv, *next_sv;
		1349
		1350	for (;;)
		1351	{
		1352	LOCK;
		1353	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1354
		1355	/* nothing to schedule: call the idle handler */
		1356	if (expect_false (!next_sv))
		1357	{
		1358	dSP;
		1359	UNLOCK;
		1360
		1361	ENTER;
		1362	SAVETMPS;
		1363
		1364	PUSHMARK (SP);
		1365	PUTBACK;
		1366	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1367
		1368	FREETMPS;
		1369	LEAVE;
		1370	continue;
		1371	}
		1372
		1373	ta->next = SvSTATE (next_sv);
		1374
		1375	/* cannot transfer to destroyed coros, skip and look for next */
		1376	if (expect_false (ta->next->flags & CF_DESTROYED))
		1377	{
		1378	UNLOCK;
		1379	SvREFCNT_dec (next_sv);
		1380	/* coro_nready is already taken care of by destroy */
		1381	continue;
		1382	}
		1383
		1384	--coro_nready;
		1385	UNLOCK;
		1386	break;
		1387	}
		1388
		1389	/* free this only after the transfer */
		1390	prev_sv = SvRV (coro_current);
		1391	ta->prev = SvSTATE (prev_sv);
		1392	TRANSFER_CHECK (*ta);
		1393	assert (ta->next->flags & CF_READY);
		1394	ta->next->flags &= ~CF_READY;
		1395	SvRV_set (coro_current, next_sv);
915		1396
916	LOCK;	1397	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	free_coro_mortal ();	1398	free_coro_mortal (aTHX);
951	coro_mortal = prev;	1399	coro_mortal = prev_sv;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;	1400	UNLOCK;
958	}	1401	}
959		1402
960	static void	1403	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1404	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1405	{
963	LOCK;	1406	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1407	prepare_schedule (aTHX_ ta);
		1408	}
		1409
		1410	static int
		1411	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1412	{
		1413	if (coro_nready)
		1414	{
		1415	SV *prev = SvRV (coro_current);
		1416	prepare_schedule (aTHX_ ta);
		1417	api_ready (prev);
		1418	return 1;
		1419	}
		1420	else
		1421	return 0;
968	}	1422	}
969		1423
970	static void	1424	static void
971	api_schedule (void)	1425	api_schedule (void)
972	{	1426	{
973	dTHX;	1427	dTHX;
974	struct transfer_args ta;	1428	struct transfer_args ta;
975		1429
976	prepare_schedule (&ta);	1430	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1431	TRANSFER (ta);
978	}	1432	}
979		1433
980	static void	1434	static int
981	api_cede (void)	1435	api_cede (void)
982	{	1436	{
983	dTHX;	1437	dTHX;
984	struct transfer_args ta;	1438	struct transfer_args ta;
985		1439
986	prepare_cede (&ta);	1440	prepare_cede (aTHX_ &ta);
		1441
		1442	if (expect_true (ta.prev != ta.next))
		1443	{
987	TRANSFER (ta);	1444	TRANSFER (ta);
		1445	return 1;
		1446	}
		1447	else
		1448	return 0;
988	}	1449	}
989		1450
		1451	static int
		1452	api_cede_notself (void)
		1453	{
		1454	dTHX;
		1455	struct transfer_args ta;
		1456
		1457	if (prepare_cede_notself (aTHX_ &ta))
		1458	{
		1459	TRANSFER (ta);
		1460	return 1;
		1461	}
		1462	else
		1463	return 0;
		1464	}
		1465
		1466	static void
		1467	api_trace (SV *coro_sv, int flags)
		1468	{
		1469	dTHX;
		1470	struct coro *coro = SvSTATE (coro_sv);
		1471
		1472	if (flags & CC_TRACE)
		1473	{
		1474	if (!coro->cctx)
		1475	coro->cctx = cctx_new ();
		1476	else if (!(coro->cctx->flags & CC_TRACE))
		1477	croak ("cannot enable tracing on coroutine with custom stack");
		1478
		1479	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1480	}
		1481	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1482	{
		1483	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1484
		1485	if (coro->flags & CF_RUNNING)
		1486	PL_runops = RUNOPS_DEFAULT;
		1487	else
		1488	coro->slot->runops = RUNOPS_DEFAULT;
		1489	}
		1490	}
		1491
990	MODULE = Coro::State PACKAGE = Coro::State	1492	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1493
992	PROTOTYPES: DISABLE	1494	PROTOTYPES: DISABLE
993		1495
994	BOOT:	1496	BOOT:
995	{	1497	{
996	#ifdef USE_ITHREADS	1498	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1499	MUTEX_INIT (&coro_mutex);
998	#endif	1500	#endif
999	BOOT_PAGESIZE;	1501	BOOT_PAGESIZE;
1000		1502
		1503	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1504	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1505
		1506	hv_sig = coro_get_hv ("SIG", TRUE);
		1507	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1508	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1509
		1510	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1511	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1512
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1513	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1514
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1515	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1518	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1519
1007	main_mainstack = PL_mainstack;	1520	main_mainstack = PL_mainstack;
		1521	main_top_env = PL_top_env;
		1522
		1523	while (main_top_env->je_prev)
		1524	main_top_env = main_top_env->je_prev;
1008		1525
1009	coroapi.ver = CORO_API_VERSION;	1526	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1527	coroapi.transfer = api_transfer;
1011		1528
1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1529	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1019	struct coro *coro;	1536	struct coro *coro;
1020	HV *hv;	1537	HV *hv;
1021	int i;	1538	int i;
1022		1539
1023	Newz (0, coro, 1, struct coro);	1540	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1541	coro->args = newAV ();
		1542	coro->flags = CF_NEW;
1025		1543
		1544	if (coro_first) coro_first->prev = coro;
		1545	coro->next = coro_first;
		1546	coro_first = coro;
		1547
1026	hv = newHV ();	1548	coro->hv = hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1549	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1550	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1551
		1552	av_extend (coro->args, items - 1);
1030	for (i = 1; i < items; i++)	1553	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1554	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1555	}
1036	OUTPUT:	1556	OUTPUT:
1037	RETVAL	1557	RETVAL
1038		1558
		1559	# these not obviously related functions are all rolled into the same xs
		1560	# function to increase chances that they all will call transfer with the same
		1561	# stack offset
1039	void	1562	void
1040	_set_stacklevel (...)	1563	_set_stacklevel (...)
1041	ALIAS:	1564	ALIAS:
1042	Coro::State::transfer = 1	1565	Coro::State::transfer = 1
1043	Coro::schedule = 2	1566	Coro::schedule = 2
1044	Coro::cede = 3	1567	Coro::cede = 3
1045	Coro::Cont::yield = 4	1568	Coro::cede_notself = 4
1046	CODE:	1569	CODE:
1047	{	1570	{
1048	struct transfer_args ta;	1571	struct transfer_args ta;
1049		1572
1050	switch (ix)	1573	switch (ix)
1051	{	1574	{
1052	case 0:	1575	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1576	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1577	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1578	break;
1057		1579
1058	case 1:	1580	case 1:
1059	if (items != 3)	1581	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1582	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1583
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1584	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1585	break;
1064		1586
1065	case 2:	1587	case 2:
1066	prepare_schedule (&ta);	1588	prepare_schedule (aTHX_ &ta);
1067	break;	1589	break;
1068		1590
1069	case 3:	1591	case 3:
1070	prepare_cede (&ta);	1592	prepare_cede (aTHX_ &ta);
1071	break;	1593	break;
1072		1594
1073	case 4:	1595	case 4:
1074	{	1596	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1597	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1598
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1599	break;
1098
1099	}	1600	}
1100		1601
		1602	BARRIER;
1101	TRANSFER (ta);	1603	TRANSFER (ta);
1102	}
1103		1604
1104	void	1605	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1105	_clone_state_from (SV *dst, SV *src)	1606	XSRETURN_YES;
		1607	}
		1608
		1609	bool
		1610	_destroy (SV *coro_sv)
1106	CODE:	1611	CODE:
1107	{	1612	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1613	OUTPUT:
1109		1614	RETVAL
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1615
1122	void	1616	void
1123	_exit (code)	1617	_exit (code)
1124	int code	1618	int code
1125	PROTOTYPE: $	1619	PROTOTYPE: $
1126	CODE:	1620	CODE:
1127	_exit (code);	1621	_exit (code);
1128		1622
		1623	int
		1624	cctx_stacksize (int new_stacksize = 0)
		1625	CODE:
		1626	RETVAL = coro_stacksize;
		1627	if (new_stacksize)
		1628	coro_stacksize = new_stacksize;
		1629	OUTPUT:
		1630	RETVAL
		1631
		1632	int
		1633	cctx_count ()
		1634	CODE:
		1635	RETVAL = cctx_count;
		1636	OUTPUT:
		1637	RETVAL
		1638
		1639	int
		1640	cctx_idle ()
		1641	CODE:
		1642	RETVAL = cctx_idle;
		1643	OUTPUT:
		1644	RETVAL
		1645
		1646	void
		1647	list ()
		1648	PPCODE:
		1649	{
		1650	struct coro *coro;
		1651	for (coro = coro_first; coro; coro = coro->next)
		1652	if (coro->hv)
		1653	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1654	}
		1655
		1656	void
		1657	call (Coro::State coro, SV *coderef)
		1658	ALIAS:
		1659	eval = 1
		1660	CODE:
		1661	{
		1662	if (coro->mainstack)
		1663	{
		1664	struct coro temp;
		1665
		1666	if (!(coro->flags & CF_RUNNING))
		1667	{
		1668	save_perl (aTHX_ &temp);
		1669	load_perl (aTHX_ coro);
		1670	}
		1671
		1672	{
		1673	dSP;
		1674	ENTER;
		1675	SAVETMPS;
		1676	PUSHMARK (SP);
		1677	PUTBACK;
		1678
		1679	if (ix)
		1680	eval_sv (coderef, 0);
		1681	else
		1682	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1683
		1684	SPAGAIN;
		1685	FREETMPS;
		1686	LEAVE;
		1687	PUTBACK;
		1688	}
		1689
		1690	if (!(coro->flags & CF_RUNNING))
		1691	{
		1692	save_perl (aTHX_ coro);
		1693	load_perl (aTHX_ &temp);
		1694	}
		1695	}
		1696	}
		1697
		1698	SV *
		1699	is_ready (Coro::State coro)
		1700	PROTOTYPE: $
		1701	ALIAS:
		1702	is_ready = CF_READY
		1703	is_running = CF_RUNNING
		1704	is_new = CF_NEW
		1705	is_destroyed = CF_DESTROYED
		1706	CODE:
		1707	RETVAL = boolSV (coro->flags & ix);
		1708	OUTPUT:
		1709	RETVAL
		1710
		1711	void
		1712	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1713
		1714	SV *
		1715	has_stack (Coro::State coro)
		1716	PROTOTYPE: $
		1717	CODE:
		1718	RETVAL = boolSV (!!coro->cctx);
		1719	OUTPUT:
		1720	RETVAL
		1721
		1722	int
		1723	is_traced (Coro::State coro)
		1724	PROTOTYPE: $
		1725	CODE:
		1726	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1727	OUTPUT:
		1728	RETVAL
		1729
		1730	IV
		1731	rss (Coro::State coro)
		1732	PROTOTYPE: $
		1733	ALIAS:
		1734	usecount = 1
		1735	CODE:
		1736	switch (ix)
		1737	{
		1738	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1739	case 1: RETVAL = coro->usecount; break;
		1740	}
		1741	OUTPUT:
		1742	RETVAL
		1743
		1744
1129	MODULE = Coro::State PACKAGE = Coro	1745	MODULE = Coro::State PACKAGE = Coro
1130		1746
1131	BOOT:	1747	BOOT:
1132	{	1748	{
1133	int i;	1749	int i;
1134		1750
		1751	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1752	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1753	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1754
		1755	coro_current = coro_get_sv ("Coro::current", FALSE);
		1756	SvREADONLY_on (coro_current);
		1757
1135	coro_stash = gv_stashpv ("Coro", TRUE);	1758	coro_stash = gv_stashpv ("Coro", TRUE);
1136		1759
1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1760	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1761	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1762	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1763	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1764	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1765	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1766
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1767	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1768	coro_ready[i] = newAV ();
1149		1769
1150	{	1770	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1771	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1772	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1152		1773
1153	coroapi.schedule = api_schedule;	1774	coroapi.schedule = api_schedule;
1154	coroapi.cede = api_cede;	1775	coroapi.cede = api_cede;
		1776	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1777	coroapi.ready = api_ready;
		1778	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1779	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1780	coroapi.current = coro_current;
1158		1781
1159	GCoroAPI = &coroapi;	1782	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1783	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1784	SvREADONLY_on (sv);
1162	}	1785	}
1163	}	1786	}
		1787
		1788	void
		1789	_set_current (SV *current)
		1790	PROTOTYPE: $
		1791	CODE:
		1792	SvREFCNT_dec (SvRV (coro_current));
		1793	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1794
1165	int	1795	int
1166	prio (Coro::State coro, int newprio = 0)	1796	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1797	ALIAS:
1168	nice = 1	1798	nice = 1
…		…
1171	RETVAL = coro->prio;	1801	RETVAL = coro->prio;
1172		1802
1173	if (items > 1)	1803	if (items > 1)
1174	{	1804	{
1175	if (ix)	1805	if (ix)
1176	newprio += coro->prio;	1806	newprio = coro->prio - newprio;
1177		1807
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1808	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1809	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1810
1181	coro->prio = newprio;	1811	coro->prio = newprio;
1182	}	1812	}
1183	}	1813	}
		1814	OUTPUT:
		1815	RETVAL
1184		1816
1185	void	1817	SV *
1186	ready (SV *self)	1818	ready (SV *self)
1187	PROTOTYPE: $	1819	PROTOTYPE: $
1188	CODE:	1820	CODE:
1189	api_ready (self);	1821	RETVAL = boolSV (api_ready (self));
		1822	OUTPUT:
		1823	RETVAL
1190		1824
1191	int	1825	int
1192	nready (...)	1826	nready (...)
1193	PROTOTYPE:	1827	PROTOTYPE:
1194	CODE:	1828	CODE:
1195	RETVAL = coro_nready;	1829	RETVAL = coro_nready;
1196	OUTPUT:	1830	OUTPUT:
1197	RETVAL	1831	RETVAL
1198		1832
		1833	void
		1834	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1835	PROTOTYPE: $;$
		1836	CODE:
		1837	SvREFCNT_dec (self->throw);
		1838	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1839
		1840	# for async_pool speedup
		1841	void
		1842	_pool_1 (SV *cb)
		1843	CODE:
		1844	{
		1845	struct coro *coro = SvSTATE (coro_current);
		1846	HV *hv = (HV *)SvRV (coro_current);
		1847	AV *defav = GvAV (PL_defgv);
		1848	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1849	AV *invoke_av;
		1850	int i, len;
		1851
		1852	if (!invoke)
		1853	croak ("\3async_pool terminate\2\n");
		1854
		1855	SvREFCNT_dec (coro->saved_deffh);
		1856	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1857
		1858	hv_store (hv, "desc", sizeof ("desc") - 1,
		1859	newSVpvn (strpair ("[async_pool]")), 0);
		1860
		1861	invoke_av = (AV *)SvRV (invoke);
		1862	len = av_len (invoke_av);
		1863
		1864	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1865
		1866	if (len > 0)
		1867	{
		1868	av_fill (defav, len - 1);
		1869	for (i = 0; i < len; ++i)
		1870	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1871	}
		1872
		1873	SvREFCNT_dec (invoke);
		1874	}
		1875
		1876	void
		1877	_pool_2 (SV *cb)
		1878	CODE:
		1879	{
		1880	struct coro *coro = SvSTATE (coro_current);
		1881
		1882	sv_setsv (cb, &PL_sv_undef);
		1883
		1884	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1885	coro->saved_deffh = 0;
		1886
		1887	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1888	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1889	croak ("\3async_pool terminate\2\n");
		1890
		1891	av_clear (GvAV (PL_defgv));
		1892	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1893	newSVpvn (strpair ("[async_pool idle]")), 0);
		1894
		1895	coro->prio = 0;
		1896
		1897	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1898	api_trace (coro_current, 0);
		1899
		1900	av_push (av_async_pool, newSVsv (coro_current));
		1901	}
		1902
		1903
1199	MODULE = Coro::State PACKAGE = Coro::AIO	1904	MODULE = Coro::State PACKAGE = Coro::AIO
1200		1905
1201	SV *	1906	SV *
1202	_get_state ()	1907	_get_state ()
1203	CODE:	1908	CODE:
1204	{	1909	{
1205	struct {	1910	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1911
		1912	RETVAL = newSV (sizeof (struct io_state));
		1913	data = (struct io_state *)SvPVX (RETVAL);
		1914	SvCUR_set (RETVAL, sizeof (struct io_state));
		1915	SvPOK_only (RETVAL);
		1916
1212	data.errorno = errno;	1917	data->errorno = errno;
1213	data.laststype = PL_laststype;	1918	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1919	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1920	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1921	}
1219	OUTPUT:	1922	OUTPUT:
1220	RETVAL	1923	RETVAL
1221		1924
1222	void	1925	void
1223	_set_state (char *data_)	1926	_set_state (char *data_)
1224	PROTOTYPE: $	1927	PROTOTYPE: $
1225	CODE:	1928	CODE:
1226	{	1929	{
1227	struct {	1930	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1931
1234	errno = data->errorno;	1932	errno = data->errorno;
1235	PL_laststype = data->laststype;	1933	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1934	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1935	PL_statcache = data->statcache;
1238	}	1936	}
		1937

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