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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.207 by root, Tue Oct 9 22:29:27 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
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	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))
72		123
73	#include "CoroAPI.h"	124	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		125
77	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	130	#else
82	# define LOCK (void)0	131	# define LOCK (void)0
83	# define UNLOCK (void)0	132	# define UNLOCK (void)0
84	#endif	133	#endif
85		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;
86	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
87	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;
88	static HV *coro_state_stash, *coro_stash;	150	static HV *coro_state_stash, *coro_stash;
89	static SV *coro_mortal; /* will be freed after next transfer */	151	static SV *coro_mortal; /* will be freed after next transfer */
90		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
91	/* this is a structure representing a c-level coroutine */	177	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	178	typedef struct coro_cctx {
93	struct coro_stack *next;	179	struct coro_cctx *next;
94		180
95	/* the stack */	181	/* the stack */
96	void *sptr;	182	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	183	size_t ssize;
98		184
99	/* cpu state */	185	/* cpu state */
100	void *idle_sp; /* original stacklevel when coroutine was created */	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 */
101	JMPENV *top_env;	188	JMPENV *top_env;
102	coro_context cctx;	189	coro_context cctx;
103	} coro_stack;
104		190
105	/* the (fake) coro_stack representing the main program */	191	#if CORO_USE_VALGRIND
106	static coro_stack *main_stack;	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))
107		216
108	/* this is a structure representing a perl-level coroutine */	217	/* this is a structure representing a perl-level coroutine */
109	struct coro {	218	struct coro {
110	/* the c coroutine allocated to this perl coroutine, if any */	219	/* the c coroutine allocated to this perl coroutine, if any */
111	coro_stack *stack;	220	coro_cctx *cctx;
112		221
113	/* data associated with this coroutine (initial args) */	222	/* process data */
114	AV *args;
115	int refcnt;
116
117	/* optionally saved, might be zero */
118	AV *defav;
119	SV *defsv;
120	SV *errsv;
121
122	/* saved global state not related to stacks */
123	U8 dowarn;
124	I32 in_eval;
125
126	/* the stacks and related info (callchain etc..) */
127	PERL_SI *curstackinfo;
128	AV *curstack;
129	AV *mainstack;	223	AV *mainstack;
130	SV **stack_sp;	224	perl_slots *slot; /* basically the saved sp */
131	OP *op;	225
132	SV **curpad;	226	AV *args; /* data associated with this coroutine (initial args) */
133	AV *comppad;	227	int refcnt; /* coroutines are refcounted, yes */
134	CV *compcv;	228	int flags; /* CF_ flags */
135	SV **stack_base;	229	HV *hv; /* the perl hash associated with this coro, if any */
136	SV **stack_max;	230
137	SV **tmps_stack;	231	/* statistics */
138	I32 tmps_floor;	232	int usecount; /* number of transfers to this coro */
139	I32 tmps_ix;
140	I32 tmps_max;
141	I32 *markstack;
142	I32 *markstack_ptr;
143	I32 *markstack_max;
144	I32 *scopestack;
145	I32 scopestack_ix;
146	I32 scopestack_max;
147	ANY *savestack;
148	I32 savestack_ix;
149	I32 savestack_max;
150	OP **retstack;
151	I32 retstack_ix;
152	I32 retstack_max;
153	PMOP *curpm;
154	COP *curcop;
155		233
156	/* coro process data */	234	/* coro process data */
157	int prio;	235	int prio;
		236	SV *throw; /* exception to be thrown */
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
158	};	243	};
159		244
160	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
161	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
162		247
		248	/** Coro ********************************************************************/
		249
		250	#define PRIO_MAX 3
		251	#define PRIO_HIGH 1
		252	#define PRIO_NORMAL 0
		253	#define PRIO_LOW -1
		254	#define PRIO_IDLE -3
		255	#define PRIO_MIN -4
		256
		257	/* for Coro.pm */
		258	static SV *coro_current;
		259	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		260	static int coro_nready;
		261	static struct coro *coro_first;
		262
		263	/** lowlevel stuff **********************************************************/
		264
		265	static SV *
		266	coro_get_sv (const char *name, int create)
		267	{
		268	#if PERL_VERSION_ATLEAST (5,9,0)
		269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		270	get_sv (name, create);
		271	#endif
		272	return get_sv (name, create);
		273	}
		274
		275	static AV *
		276	coro_get_av (const char *name, int create)
		277	{
		278	#if PERL_VERSION_ATLEAST (5,9,0)
		279	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		280	get_av (name, create);
		281	#endif
		282	return get_av (name, create);
		283	}
		284
		285	static HV *
		286	coro_get_hv (const char *name, int create)
		287	{
		288	#if PERL_VERSION_ATLEAST (5,9,0)
		289	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		290	get_hv (name, create);
		291	#endif
		292	return get_hv (name, create);
		293	}
		294
163	static AV *	295	static AV *
164	coro_clone_padlist (pTHX_ CV *cv)	296	coro_clone_padlist (pTHX_ CV *cv)
165	{	297	{
166	AV *padlist = CvPADLIST (cv);	298	AV *padlist = CvPADLIST (cv);
167	AV *newpadlist, *newpad;	299	AV *newpadlist, *newpad;
168		300
169	newpadlist = newAV ();	301	newpadlist = newAV ();
170	AvREAL_off (newpadlist);	302	AvREAL_off (newpadlist);
171	#if PERL_VERSION < 9	303	#if PERL_VERSION_ATLEAST (5,9,0)
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		305	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173	#else
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#endif	307	#endif
176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	308	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177	--AvFILLp (padlist);	309	--AvFILLp (padlist);
178		310
179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	311	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
223		355
224	#define PERL_MAGIC_coro PERL_MAGIC_ext	356	#define PERL_MAGIC_coro PERL_MAGIC_ext
225		357
226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	358	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
227		359
		360	#define CORO_MAGIC(cv) \
		361	SvMAGIC (cv) \
		362	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		363	? SvMAGIC (cv) \
		364	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		365	: 0
		366
		367	static struct coro *
		368	SvSTATE_ (pTHX_ SV *coro)
		369	{
		370	HV *stash;
		371	MAGIC *mg;
		372
		373	if (SvROK (coro))
		374	coro = SvRV (coro);
		375
		376	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		377	croak ("Coro::State object required");
		378
		379	stash = SvSTASH (coro);
		380	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		381	{
		382	/* very slow, but rare, check */
		383	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		384	croak ("Coro::State object required");
		385	}
		386
		387	mg = CORO_MAGIC (coro);
		388	return (struct coro *)mg->mg_ptr;
		389	}
		390
		391	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		392
228	/* the next two functions merely cache the padlists */	393	/* the next two functions merely cache the padlists */
229	static void	394	static void
230	get_padlist (pTHX_ CV *cv)	395	get_padlist (pTHX_ CV *cv)
231	{	396	{
232	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	397	MAGIC *mg = CORO_MAGIC (cv);
		398	AV *av;
233		399
234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
235	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236	else	402	else
237	{	403	{
238	#if 0	404	#if CORO_PREFER_PERL_FUNCTIONS
239	/* this should work - but it doesn't :( */	405	/* this is probably cleaner, but also slower? */
240	CV *cp = Perl_cv_clone (aTHX_ cv);	406	CV *cp = Perl_cv_clone (cv);
241	CvPADLIST (cv) = CvPADLIST (cp);	407	CvPADLIST (cv) = CvPADLIST (cp);
242	CvPADLIST (cp) = 0;	408	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (cp);	409	SvREFCNT_dec (cp);
244	#else	410	#else
245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
248	}	414	}
249		415
250	static void	416	static void
251	put_padlist (pTHX_ CV *cv)	417	put_padlist (pTHX_ CV *cv)
252	{	418	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	419	MAGIC *mg = CORO_MAGIC (cv);
		420	AV *av;
254		421
255	if (!mg)	422	if (expect_false (!mg))
256	{	423	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	426	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	427	mg->mg_obj = (SV *)newAV ();
261	}	428	}
262		429
263	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	430	av = (AV *)mg->mg_obj;
264	}
265		431
266	#define SB do {	432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
267	#define SE } while (0)	433	av_extend (av, AvMAX (av) + 1);
268		434
269	#define LOAD(state) load_state(aTHX_ (state));	435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	436	}
271		437
272	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	438	/** load & save, init *******************************************************/
273		439
274	static void	440	static void
275	load_state(pTHX_ Coro__State c)	441	load_perl (pTHX_ Coro__State c)
276	{	442	{
277	PL_dowarn = c->dowarn;	443	perl_slots *slot = c->slot;
278	PL_in_eval = c->in_eval;	444	c->slot = 0;
279		445
280	PL_curstackinfo = c->curstackinfo;
281	PL_curstack = c->curstack;
282	PL_mainstack = c->mainstack;	446	PL_mainstack = c->mainstack;
283	PL_stack_sp = c->stack_sp;
284	PL_op = c->op;
285	PL_curpad = c->curpad;
286	PL_comppad = c->comppad;
287	PL_compcv = c->compcv;
288	PL_stack_base = c->stack_base;
289	PL_stack_max = c->stack_max;
290	PL_tmps_stack = c->tmps_stack;
291	PL_tmps_floor = c->tmps_floor;
292	PL_tmps_ix = c->tmps_ix;
293	PL_tmps_max = c->tmps_max;
294	PL_markstack = c->markstack;
295	PL_markstack_ptr = c->markstack_ptr;
296	PL_markstack_max = c->markstack_max;
297	PL_scopestack = c->scopestack;
298	PL_scopestack_ix = c->scopestack_ix;
299	PL_scopestack_max = c->scopestack_max;
300	PL_savestack = c->savestack;
301	PL_savestack_ix = c->savestack_ix;
302	PL_savestack_max = c->savestack_max;
303	#if PERL_VERSION < 9
304	PL_retstack = c->retstack;
305	PL_retstack_ix = c->retstack_ix;
306	PL_retstack_max = c->retstack_max;
307	#endif
308	PL_curpm = c->curpm;
309	PL_curcop = c->curcop;
310		447
311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	448	GvSV (PL_defgv) = slot->defsv;
312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	449	GvAV (PL_defgv) = slot->defav;
313	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	450	GvSV (PL_errgv) = slot->errsv;
		451	GvSV (irsgv) = slot->irsgv;
		452
		453	#define VAR(name,type) PL_ ## name = slot->name;
		454	# include "state.h"
		455	#undef VAR
		456
		457	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
		458	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
314		459
315	{	460	{
316	dSP;	461	dSP;
		462
317	CV *cv;	463	CV *cv;
318		464
319	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
320	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
321	{	467	{
322	AV *padlist = (AV *)POPs;
323
324	if (padlist)
325	{
326	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
327	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
328	}	470	CvPADLIST (cv) = (AV *)POPs;
329
330	++CvDEPTH(cv);
331	}	471	}
332		472
333	PUTBACK;	473	PUTBACK;
334	}	474	}
335	}	475	}
336		476
337	static void	477	static void
338	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
339	{	479	{
340	{	480	{
341	dSP;	481	dSP;
342	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
343	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
346	/*	486	/*
347	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
348	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
349	*/	489	*/
350		490
351	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
352	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
353	for (;;)	493	for (;;)
354	{	494	{
355	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
356	{	496	{
357	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
358		498
359	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
360	{	500	{
361	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
362	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
363	{	504	{
364	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
365
366	while (--CvDEPTH(cv))
367	{
368	/* this tells the restore code to increment CvDEPTH */
369	PUSHs (Nullsv);
370	PUSHs ((SV *)cv);
371	}
372
373	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
374	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
375		509
		510	CvDEPTH (cv) = 0;
376	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
377	}	512	}
378	}	513	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE(cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	514	}
388		515
389	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
390	break;	517	break;
391		518
392	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
393	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
394	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
395	}	522	}
396		523
397	PUTBACK;	524	PUTBACK;
398	}	525	}
399		526
400	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
402	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
403		538
404	c->dowarn = PL_dowarn;
405	c->in_eval = PL_in_eval;
406
407	c->curstackinfo = PL_curstackinfo;
408	c->curstack = PL_curstack;
409	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
410	c->stack_sp = PL_stack_sp;	540
411	c->op = PL_op;	541	{
412	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
413	c->comppad = PL_comppad;	543
414	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
415	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
416	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
417	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
418	c->tmps_floor = PL_tmps_floor;	548
419	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
420	c->tmps_max = PL_tmps_max;	550	# include "state.h"
421	c->markstack = PL_markstack;	551	#undef VAR
422	c->markstack_ptr = PL_markstack_ptr;	552	}
423	c->markstack_max = PL_markstack_max;
424	c->scopestack = PL_scopestack;
425	c->scopestack_ix = PL_scopestack_ix;
426	c->scopestack_max = PL_scopestack_max;
427	c->savestack = PL_savestack;
428	c->savestack_ix = PL_savestack_ix;
429	c->savestack_max = PL_savestack_max;
430	#if PERL_VERSION < 9
431	c->retstack = PL_retstack;
432	c->retstack_ix = PL_retstack_ix;
433	c->retstack_max = PL_retstack_max;
434	#endif
435	c->curpm = PL_curpm;
436	c->curcop = PL_curcop;
437	}	553	}
438		554
439	/*	555	/*
440	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
444	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
445	static void	564	static void
446	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
447	{	566	{
448	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		571
455	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		575
459	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
460	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	579	PL_tmps_max = 32;
463		580
464	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
465	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
467		584
468	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
469	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
470	#endif	587	#endif
471		588
472	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
473	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
475		592
476	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
477	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	595	PL_savestack_max = 24;
479		596
480	#if PERL_VERSION < 9	597	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
482	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	600	PL_retstack_max = 4;
484	#endif	601	#endif
485
486	UNLOCK;
487	}	602	}
		603	#endif
488		604
489	/*	605	/*
490	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
491	*/	607	*/
492	static void	608	static void
493	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
494	{	610	{
495	if (!IN_DESTRUCT)
496	{
497	/* is this ugly, I ask? */
498	LEAVE_SCOPE (0);
499
500	/* sure it is, but more important: is it correct?? :/ */
501	FREETMPS;
502
503	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504	}
505
506	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
508		613
509	while (PL_curstackinfo)	614	while (PL_curstackinfo)
510	{	615	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
512		617
513	{ /*D*//*remove*/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		620
525	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	623	PL_curstackinfo = p;
528	}	624	}
529		625
530	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	627	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	629	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	630	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	631	Safefree (PL_retstack);
536	#endif	632	#endif
537	}	633	}
538		634
539	static void	635	static size_t
540	setup_coro (struct coro *coro)	636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
		674	static void
		675	coro_setup (pTHX_ struct coro *coro)
541	{	676	{
542	/*	677	/*
543	* emulate part of the perl startup here.	678	* emulate part of the perl startup here.
544	*/	679	*/
545	dTHX;	680	coro_init_stacks (aTHX);
		681
		682	PL_runops = RUNOPS_DEFAULT;
		683	PL_curcop = &PL_compiling;
		684	PL_in_eval = EVAL_NULL;
		685	PL_comppad = 0;
		686	PL_curpm = 0;
		687	PL_curpad = 0;
		688	PL_localizing = 0;
		689	PL_dirty = 0;
		690	PL_restartop = 0;
		691	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		692	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		693
		694	GvSV (PL_defgv) = newSV (0);
		695	GvAV (PL_defgv) = coro->args; coro->args = 0;
		696	GvSV (PL_errgv) = newSV (0);
		697	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		698	PL_rs = newSVsv (GvSV (irsgv));
		699	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		700
		701	{
		702	dSP;
		703	LOGOP myop;
		704
		705	Zero (&myop, 1, LOGOP);
		706	myop.op_next = Nullop;
		707	myop.op_flags = OPf_WANT_VOID;
		708
		709	PUSHMARK (SP);
		710	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		711	PUTBACK;
		712	PL_op = (OP *)&myop;
		713	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		714	SPAGAIN;
		715	}
		716
		717	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		718	}
		719
		720	static void
		721	coro_destroy (pTHX_ struct coro *coro)
		722	{
		723	if (!IN_DESTRUCT)
		724	{
		725	/* restore all saved variables and stuff */
		726	LEAVE_SCOPE (0);
		727	assert (PL_tmps_floor == -1);
		728
		729	/* free all temporaries */
		730	FREETMPS;
		731	assert (PL_tmps_ix == -1);
		732
		733	/* unwind all extra stacks */
		734	POPSTACK_TO (PL_mainstack);
		735
		736	/* unwind main stack */
		737	dounwind (-1);
		738	}
		739
		740	SvREFCNT_dec (GvSV (PL_defgv));
		741	SvREFCNT_dec (GvAV (PL_defgv));
		742	SvREFCNT_dec (GvSV (PL_errgv));
		743	SvREFCNT_dec (PL_defoutgv);
		744	SvREFCNT_dec (PL_rs);
		745	SvREFCNT_dec (GvSV (irsgv));
		746
		747	SvREFCNT_dec (PL_diehook);
		748	SvREFCNT_dec (PL_warnhook);
		749
		750	SvREFCNT_dec (coro->saved_deffh);
		751	SvREFCNT_dec (coro->throw);
		752
		753	coro_destroy_stacks (aTHX);
		754	}
		755
		756	static void
		757	free_coro_mortal (pTHX)
		758	{
		759	if (expect_true (coro_mortal))
		760	{
		761	SvREFCNT_dec (coro_mortal);
		762	coro_mortal = 0;
		763	}
		764	}
		765
		766	static int
		767	runops_trace (pTHX)
		768	{
		769	COP *oldcop = 0;
		770	int oldcxix = -2;
		771	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		772	coro_cctx *cctx = coro->cctx;
		773
		774	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		775	{
		776	PERL_ASYNC_CHECK ();
		777
		778	if (cctx->flags & CC_TRACE_ALL)
		779	{
		780	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		781	{
		782	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		783	SV **bot, **top;
		784	AV *av = newAV (); /* return values */
		785	SV **cb;
		786	dSP;
		787
		788	GV *gv = CvGV (cx->blk_sub.cv);
		789	SV *fullname = sv_2mortal (newSV (0));
		790	if (isGV (gv))
		791	gv_efullname3 (fullname, gv, 0);
		792
		793	bot = PL_stack_base + cx->blk_oldsp + 1;
		794	top = cx->blk_gimme == G_ARRAY ? SP + 1
		795	: cx->blk_gimme == G_SCALAR ? bot + 1
		796	: bot;
		797
		798	av_extend (av, top - bot);
		799	while (bot < top)
		800	av_push (av, SvREFCNT_inc (*bot++));
		801
		802	PL_runops = RUNOPS_DEFAULT;
		803	ENTER;
		804	SAVETMPS;
		805	EXTEND (SP, 3);
		806	PUSHMARK (SP);
		807	PUSHs (&PL_sv_no);
		808	PUSHs (fullname);
		809	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		810	PUTBACK;
		811	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		812	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		813	SPAGAIN;
		814	FREETMPS;
		815	LEAVE;
		816	PL_runops = runops_trace;
		817	}
		818
		819	if (oldcop != PL_curcop)
		820	{
		821	oldcop = PL_curcop;
		822
		823	if (PL_curcop != &PL_compiling)
		824	{
		825	SV **cb;
		826
		827	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		828	{
		829	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		830
		831	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		832	{
		833	runops_proc_t old_runops = PL_runops;
		834	dSP;
		835	GV *gv = CvGV (cx->blk_sub.cv);
		836	SV *fullname = sv_2mortal (newSV (0));
		837
		838	if (isGV (gv))
		839	gv_efullname3 (fullname, gv, 0);
		840
		841	PL_runops = RUNOPS_DEFAULT;
		842	ENTER;
		843	SAVETMPS;
		844	EXTEND (SP, 3);
		845	PUSHMARK (SP);
		846	PUSHs (&PL_sv_yes);
		847	PUSHs (fullname);
		848	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		849	PUTBACK;
		850	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		851	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		852	SPAGAIN;
		853	FREETMPS;
		854	LEAVE;
		855	PL_runops = runops_trace;
		856	}
		857
		858	oldcxix = cxstack_ix;
		859	}
		860
		861	if (cctx->flags & CC_TRACE_LINE)
		862	{
		863	dSP;
		864
		865	PL_runops = RUNOPS_DEFAULT;
		866	ENTER;
		867	SAVETMPS;
		868	EXTEND (SP, 3);
		869	PL_runops = RUNOPS_DEFAULT;
		870	PUSHMARK (SP);
		871	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		872	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		873	PUTBACK;
		874	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		875	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		876	SPAGAIN;
		877	FREETMPS;
		878	LEAVE;
		879	PL_runops = runops_trace;
		880	}
		881	}
		882	}
		883	}
		884	}
		885
		886	TAINT_NOT;
		887	return 0;
		888	}
		889
		890	/* inject a fake call to Coro::State::_cctx_init into the execution */
		891	/* _cctx_init should be careful, as it could be called at almost any time */
		892	/* during execution of a perl program */
		893	static void NOINLINE
		894	cctx_prepare (pTHX_ coro_cctx *cctx)
		895	{
546	dSP;	896	dSP;
547	UNOP myop;	897	LOGOP myop;
548	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
549		898
550	coro_init_stacks (aTHX);	899	PL_top_env = &PL_start_env;
551	/*PL_curcop = 0;*/
552	/*PL_in_eval = PL_in_eval;*/ /* inherit */
553	SvREFCNT_dec (GvAV (PL_defgv));
554	GvAV (PL_defgv) = coro->args; coro->args = 0;
555		900
556	SPAGAIN;	901	if (cctx->flags & CC_TRACE)
		902	PL_runops = runops_trace;
557		903
558	Zero (&myop, 1, UNOP);	904	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	905	myop.op_next = PL_op;
560	myop.op_flags = OPf_WANT_VOID;	906	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561		907
		908	PUSHMARK (SP);
		909	EXTEND (SP, 2);
		910	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		911	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		912	PUTBACK;
562	PL_op = (OP *)&myop;	913	PL_op = (OP *)&myop;
563
564	PUSHMARK(SP);
565	XPUSHs (sub_init);
566	PUTBACK;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	914	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	915	SPAGAIN;
569
570	ENTER; /* necessary e.g. for dounwind */
571	}	916	}
572		917
		918	/*
		919	* this is a _very_ stripped down perl interpreter ;)
		920	*/
573	static void	921	static void
574	free_coro_mortal ()
575	{
576	if (coro_mortal)
577	{
578	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;
580	}
581	}
582
583	static void
584	coro_run (void *arg)	922	cctx_run (void *arg)
585	{	923	{
		924	dTHX;
		925
		926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		927	UNLOCK;
		928
		929	/* we now skip the entersub that lead to transfer() */
		930	PL_op = PL_op->op_next;
		931
		932	/* inject a fake subroutine call to cctx_init */
		933	cctx_prepare (aTHX_ (coro_cctx *)arg);
		934
		935	/* somebody or something will hit me for both perl_run and PL_restartop */
		936	PL_restartop = PL_op;
		937	perl_run (PL_curinterp);
		938
586	/*	939	/*
587	* this is a _very_ stripped down perl interpreter ;)	940	* If perl-run returns we assume exit() was being called or the coro
		941	* fell off the end, which seems to be the only valid (non-bug)
		942	* reason for perl_run to return. We try to exit by jumping to the
		943	* bootstrap-time "top" top_env, as we cannot restore the "main"
		944	* coroutine as Coro has no such concept
588	*/	945	*/
589	dTHX;
590
591	UNLOCK;
592
593	PL_top_env = &PL_start_env;	946	PL_top_env = main_top_env;
594		947	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
597
598	/* continue at cctx_init, without entersub */
599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601	/* somebody will hit me for both perl_run and PL_restart_op */
602	perl_run (aTHX_ PERL_GET_CONTEXT);
603
604	abort ();
605	}	948	}
606		949
607	static coro_stack *	950	static coro_cctx *
608	stack_new ()	951	cctx_new ()
609	{	952	{
610	coro_stack *stack;	953	coro_cctx *cctx;
		954	void *stack_start;
		955	size_t stack_size;
611		956
		957	++cctx_count;
		958
612	New (0, stack, 1, coro_stack);	959	Newz (0, cctx, 1, coro_cctx);
613		960
614	#if HAVE_MMAP	961	#if HAVE_MMAP
615		962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	963	/* mmap supposedly does allocate-on-write for us */
617	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
618		965
619	if (stack->sptr == (void *)-1)	966	if (cctx->sptr != (void *)-1)
		967	{
		968	# if CORO_STACKGUARD
		969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags |= CC_MAPPED;
620	{	974	}
		975	else
		976	#endif
		977	{
		978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
		980
		981	if (!cctx->sptr)
		982	{
621	perror ("FATAL: unable to mmap stack for coroutine");	983	perror ("FATAL: unable to allocate stack for coroutine");
622	_exit (EXIT_FAILURE);	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, cctx_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))
623	}	1026	{
		1027	coro_cctx *cctx = cctx_first;
		1028	cctx_first = cctx->next;
		1029	--cctx_idle;
624		1030
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1031	if (expect_true (!CCTX_EXPIRED (cctx)))
		1032	return cctx;
626		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)
627	#else	1077	#else
628		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
629	stack->ssize = STACKSIZE * (long)sizeof (long);
630	New (0, stack->sptr, STACKSIZE, long);
631
632	if (!stack->sptr)
633	{
634	perror (stderr, "FATAL: unable to malloc stack for coroutine");
635	_exit (EXIT_FAILURE);
636	}
637
638	#endif	1079	#endif
639		1080	)
640	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");
641
642	return stack;
643	}
644
645	static void
646	stack_free (coro_stack *stack)
647	{
648	if (!stack || stack == main_stack)
649	return;
650
651	#if HAVE_MMAP
652	munmap (stack->sptr, stack->ssize);
653	#else
654	Safefree (stack->sptr);
655	#endif
656
657	Safefree (stack);
658	}
659
660	static coro_stack *stack_first;
661
662	static coro_stack *
663	stack_get ()
664	{
665	coro_stack *stack;
666
667	if (stack_first)
668	{
669	stack = stack_first;
670	stack_first = stack->next;
671	}
672	else
673	{
674	stack = stack_new ();
675	PL_op = PL_op->op_next;
676	}	1082	}
677
678	return stack;
679	}	1083	}
680		1084
681	static void	1085	/* always use the TRANSFER macro */
682	stack_put (coro_stack *stack)	1086	static void NOINLINE
683	{
684	stack->next = stack_first;
685	stack_first = stack;
686	}
687
688	/* never call directly, always through the coro_state_transfer global variable */
689	static void
690	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1087	transfer (pTHX_ struct coro *prev, struct coro *next)
691	{	1088	{
692	dSTACKLEVEL;	1089	dSTACKLEVEL;
693		1090
694	/* sometimes transfer is only called to set idle_sp */	1091	/* sometimes transfer is only called to set idle_sp */
695	if (flags == TRANSFER_SET_STACKLEVEL)	1092	if (expect_false (!next))
		1093	{
696	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
697	else if (prev != next)	1095	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
698	{	1096	}
		1097	else if (expect_true (prev != next))
		1098	{
699	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;
700		1111
701	LOCK;	1112	LOCK;
702		1113
703	if (next->mainstack)	1114	if (expect_false (next->flags & CF_NEW))
704	{	1115	{
705	/* coroutine already started */	1116	/* need to start coroutine */
706	SAVE (prev, flags);	1117	next->flags &= ~CF_NEW;
707	LOAD (next);	1118	/* first get rid of the old state */
		1119	save_perl (aTHX_ prev);
		1120	/* setup coroutine call */
		1121	coro_setup (aTHX_ next);
708	}	1122	}
709	else	1123	else
710	{	1124	{
711	/* need to start coroutine */	1125	/* coroutine already started */
712	/* first get rid of the old state */	1126	save_perl (aTHX_ prev);
713	SAVE (prev, -1);	1127	load_perl (aTHX_ next);
714	/* setup coroutine call */
715	setup_coro (next);
716	/* need a stack */
717	next->stack = 0;
718	}	1128	}
719		1129
720	prev__stack = prev->stack;	1130	prev__cctx = prev->cctx;
721		1131
722	/* possibly "free" the stack */	1132	/* possibly "free" the cctx */
723	if (prev__stack->idle_sp == STACKLEVEL)	1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
724	{	1134	{
725	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
726	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	if (!next->cctx)
		1144	next->cctx = cctx_get (aTHX);
		1145
		1146	cctx_put (prev__cctx);
727	}	1147	}
728		1148
729	if (!next->stack)	1149	++next->usecount;
730	next->stack = stack_get ();
731		1150
732	if (prev__stack != next->stack)	1151	if (expect_true (!next->cctx))
		1152	next->cctx = cctx_get (aTHX);
		1153
		1154	if (expect_false (prev__cctx != next->cctx))
733	{	1155	{
734	prev__stack->top_env = PL_top_env;	1156	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->stack->top_env;	1157	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1158	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	1159	}
738		1160
739	free_coro_mortal ();	1161	free_coro_mortal (aTHX);
740
741	UNLOCK;	1162	UNLOCK;
742	}
743	}
744		1163
745	/* use this function pointer to call the above function */	1164	if (expect_false (prev->throw || next->throw))
746	/* this is done to increase chances of the compiler not inlining the call */	1165	{
747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */	1166	struct coro *coro = SvSTATE (coro_current);
748	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1167
		1168	if (coro->throw)
		1169	{
		1170	SV *exception = coro->throw;
		1171	coro->throw = 0;
		1172	sv_setsv (ERRSV, exception);
		1173	croak (0);
		1174	}
		1175	}
		1176	}
		1177	}
749		1178
750	struct transfer_args	1179	struct transfer_args
751	{	1180	{
752	struct coro *prev, *next;	1181	struct coro *prev, *next;
753	int flags;
754	};	1182	};
755		1183
756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1184	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1185	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
757		1186
		1187	/** high level stuff ********************************************************/
		1188
758	static void	1189	static int
759	coro_state_destroy (struct coro *coro)	1190	coro_state_destroy (pTHX_ struct coro *coro)
760	{	1191	{
761	if (coro->refcnt--)	1192	if (coro->flags & CF_DESTROYED)
762	return;	1193	return 0;
		1194
		1195	coro->flags |= CF_DESTROYED;
		1196
		1197	if (coro->flags & CF_READY)
		1198	{
		1199	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1200	/* alternative: look through all ready queues and remove the coro */
		1201	LOCK;
		1202	--coro_nready;
		1203	UNLOCK;
		1204	}
		1205	else
		1206	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
763		1207
764	if (coro->mainstack && coro->mainstack != main_mainstack)	1208	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	1209	{
766	struct coro temp;	1210	struct coro temp;
767		1211
768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1212	if (coro->flags & CF_RUNNING)
		1213	croak ("FATAL: tried to destroy currently running coroutine");
		1214
		1215	save_perl (aTHX_ &temp);
769	LOAD (aTHX_ coro);	1216	load_perl (aTHX_ coro);
770		1217
771	destroy_stacks (aTHX);	1218	coro_destroy (aTHX_ coro);
772		1219
773	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1220	load_perl (aTHX_ &temp);
774		1221
775	coro->mainstack = 0;	1222	coro->slot = 0;
776	}	1223	}
777		1224
778	stack_free (coro->stack);	1225	cctx_destroy (coro->cctx);
779	SvREFCNT_dec (coro->args);	1226	SvREFCNT_dec (coro->args);
780	Safefree (coro);	1227
		1228	if (coro->next) coro->next->prev = coro->prev;
		1229	if (coro->prev) coro->prev->next = coro->next;
		1230	if (coro == coro_first) coro_first = coro->next;
		1231
		1232	return 1;
781	}	1233	}
782		1234
783	static int	1235	static int
784	coro_state_clear (SV *sv, MAGIC *mg)	1236	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
785	{	1237	{
786	struct coro *coro = (struct coro *)mg->mg_ptr;	1238	struct coro *coro = (struct coro *)mg->mg_ptr;
787	mg->mg_ptr = 0;	1239	mg->mg_ptr = 0;
788		1240
		1241	coro->hv = 0;
		1242
		1243	if (--coro->refcnt < 0)
		1244	{
789	coro_state_destroy (coro);	1245	coro_state_destroy (aTHX_ coro);
		1246	Safefree (coro);
		1247	}
790		1248
791	return 0;	1249	return 0;
792	}	1250	}
793		1251
794	static int	1252	static int
795	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1253	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
796	{	1254	{
797	struct coro *coro = (struct coro *)mg->mg_ptr;	1255	struct coro *coro = (struct coro *)mg->mg_ptr;
798		1256
799	++coro->refcnt;	1257	++coro->refcnt;
800		1258
801	return 0;	1259	return 0;
802	}	1260	}
803		1261
804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1262	static MGVTBL coro_state_vtbl = {
		1263	0, 0, 0, 0,
		1264	coro_state_free,
		1265	0,
		1266	#ifdef MGf_DUP
		1267	coro_state_dup,
		1268	#else
		1269	# define MGf_DUP 0
		1270	#endif
		1271	};
805		1272
806	static struct coro *
807	SvSTATE (SV *coro)
808	{
809	HV *stash;
810	MAGIC *mg;
811
812	if (SvROK (coro))
813	coro = SvRV (coro);
814
815	stash = SvSTASH (coro);
816	if (stash != coro_stash && stash != coro_state_stash)
817	{
818	/* very slow, but rare, check */
819	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
820	croak ("Coro::State object required");
821	}
822
823	mg = SvMAGIC (coro);
824	assert (mg->mg_type == PERL_MAGIC_ext);
825	return (struct coro *)mg->mg_ptr;
826	}
827
828	static void	1273	static void
829	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1274	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
830	{	1275	{
831	ta->prev = SvSTATE (prev);	1276	ta->prev = SvSTATE (prev_sv);
832	ta->next = SvSTATE (next);	1277	ta->next = SvSTATE (next_sv);
833	ta->flags = flags;	1278	TRANSFER_CHECK (*ta);
834	}	1279	}
835		1280
836	static void	1281	static void
837	api_transfer (SV *prev, SV *next, int flags)	1282	api_transfer (SV *prev_sv, SV *next_sv)
838	{	1283	{
839	dTHX;	1284	dTHX;
840	struct transfer_args ta;	1285	struct transfer_args ta;
841		1286
842	prepare_transfer (aTHX_ &ta, prev, next, flags);	1287	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
843	TRANSFER (ta);	1288	TRANSFER (ta);
844	}	1289	}
845		1290
846	/** Coro ********************************************************************/	1291	/** Coro ********************************************************************/
847		1292
848	#define PRIO_MAX 3
849	#define PRIO_HIGH 1
850	#define PRIO_NORMAL 0
851	#define PRIO_LOW -1
852	#define PRIO_IDLE -3
853	#define PRIO_MIN -4
854
855	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;
857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;
859
860	static void	1293	static void
861	coro_enq (pTHX_ SV *sv)	1294	coro_enq (pTHX_ SV *coro_sv)
862	{	1295	{
863	int prio;
864
865	if (SvTYPE (sv) != SVt_PVHV)
866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868	prio = SvSTATE (sv)->prio;
869
870	av_push (coro_ready [prio - PRIO_MIN], sv);	1296	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
871	coro_nready++;
872	}	1297	}
873		1298
874	static SV *	1299	static SV *
875	coro_deq (pTHX_ int min_prio)	1300	coro_deq (pTHX_ int min_prio)
876	{	1301	{
…		…
880	if (min_prio < 0)	1305	if (min_prio < 0)
881	min_prio = 0;	1306	min_prio = 0;
882		1307
883	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1308	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
884	if (AvFILLp (coro_ready [prio]) >= 0)	1309	if (AvFILLp (coro_ready [prio]) >= 0)
885	{
886	coro_nready--;
887	return av_shift (coro_ready [prio]);	1310	return av_shift (coro_ready [prio]);
888	}
889		1311
890	return 0;	1312	return 0;
891	}	1313	}
892		1314
893	static void	1315	static int
894	api_ready (SV *coro)	1316	api_ready (SV *coro_sv)
895	{	1317	{
896	dTHX;	1318	dTHX;
		1319	struct coro *coro;
897		1320
898	if (SvROK (coro))	1321	if (SvROK (coro_sv))
899	coro = SvRV (coro);	1322	coro_sv = SvRV (coro_sv);
		1323
		1324	coro = SvSTATE (coro_sv);
		1325
		1326	if (coro->flags & CF_READY)
		1327	return 0;
		1328
		1329	coro->flags |= CF_READY;
900		1330
901	LOCK;	1331	LOCK;
902	coro_enq (aTHX_ SvREFCNT_inc (coro));	1332	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1333	++coro_nready;
903	UNLOCK;	1334	UNLOCK;
904	}
905		1335
		1336	return 1;
		1337	}
		1338
906	static void	1339	static int
		1340	api_is_ready (SV *coro_sv)
		1341	{
		1342	dTHX;
		1343	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1344	}
		1345
		1346	static void
907	prepare_schedule (aTHX_ struct transfer_args *ta)	1347	prepare_schedule (pTHX_ struct transfer_args *ta)
908	{	1348	{
909	SV *current, *prev, *next;	1349	SV *prev_sv, *next_sv;
		1350
		1351	for (;;)
		1352	{
		1353	LOCK;
		1354	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1355
		1356	/* nothing to schedule: call the idle handler */
		1357	if (expect_false (!next_sv))
		1358	{
		1359	dSP;
		1360	UNLOCK;
		1361
		1362	ENTER;
		1363	SAVETMPS;
		1364
		1365	PUSHMARK (SP);
		1366	PUTBACK;
		1367	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1368
		1369	FREETMPS;
		1370	LEAVE;
		1371	continue;
		1372	}
		1373
		1374	ta->next = SvSTATE (next_sv);
		1375
		1376	/* cannot transfer to destroyed coros, skip and look for next */
		1377	if (expect_false (ta->next->flags & CF_DESTROYED))
		1378	{
		1379	UNLOCK;
		1380	SvREFCNT_dec (next_sv);
		1381	/* coro_nready is already taken care of by destroy */
		1382	continue;
		1383	}
		1384
		1385	--coro_nready;
		1386	UNLOCK;
		1387	break;
		1388	}
		1389
		1390	/* free this only after the transfer */
		1391	prev_sv = SvRV (coro_current);
		1392	ta->prev = SvSTATE (prev_sv);
		1393	TRANSFER_CHECK (*ta);
		1394	assert (ta->next->flags & CF_READY);
		1395	ta->next->flags &= ~CF_READY;
		1396	SvRV_set (coro_current, next_sv);
910		1397
911	LOCK;	1398	LOCK;
912
913	current = GvSV (coro_current);
914
915	for (;;)
916	{
917	LOCK;
918
919	next = coro_deq (aTHX_ PRIO_MIN);
920
921	if (next)
922	break;
923
924	UNLOCK;
925
926	{
927	dSP;
928
929	ENTER;
930	SAVETMPS;
931
932	PUSHMARK (SP);
933	PUTBACK;
934	call_sv (GvSV (coro_idle), G_DISCARD);
935
936	FREETMPS;
937	LEAVE;
938	}
939	}
940
941	prev = SvRV (current);
942	SvRV (current) = next;
943
944	/* free this only after the transfer */
945	free_coro_mortal ();	1399	free_coro_mortal (aTHX);
946	coro_mortal = prev;	1400	coro_mortal = prev_sv;
947
948	ta->prev = SvSTATE (prev);
949	ta->next = SvSTATE (next);
950	ta->flags = TRANSFER_SAVE_ALL;
951
952	UNLOCK;	1401	UNLOCK;
953	}	1402	}
954		1403
955	static void	1404	static void
956	prepare_cede (aTHX_ struct transfer_args *ta)	1405	prepare_cede (pTHX_ struct transfer_args *ta)
957	{	1406	{
958	LOCK;	1407	api_ready (coro_current);
959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960	UNLOCK;
961
962	prepare_schedule (ta);	1408	prepare_schedule (aTHX_ ta);
		1409	}
		1410
		1411	static int
		1412	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1413	{
		1414	if (coro_nready)
		1415	{
		1416	SV *prev = SvRV (coro_current);
		1417	prepare_schedule (aTHX_ ta);
		1418	api_ready (prev);
		1419	return 1;
		1420	}
		1421	else
		1422	return 0;
963	}	1423	}
964		1424
965	static void	1425	static void
966	api_schedule (void)	1426	api_schedule (void)
967	{	1427	{
968	dTHX;	1428	dTHX;
969	struct transfer_args ta;	1429	struct transfer_args ta;
970		1430
971	prepare_schedule (&ta);	1431	prepare_schedule (aTHX_ &ta);
972	TRANSFER (ta);	1432	TRANSFER (ta);
973	}	1433	}
974		1434
975	static void	1435	static int
976	api_cede (void)	1436	api_cede (void)
977	{	1437	{
978	dTHX;	1438	dTHX;
979	struct transfer_args ta;	1439	struct transfer_args ta;
980		1440
981	prepare_cede (&ta);	1441	prepare_cede (aTHX_ &ta);
		1442
		1443	if (expect_true (ta.prev != ta.next))
		1444	{
982	TRANSFER (ta);	1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
983	}	1450	}
984		1451
		1452	static int
		1453	api_cede_notself (void)
		1454	{
		1455	dTHX;
		1456	struct transfer_args ta;
		1457
		1458	if (prepare_cede_notself (aTHX_ &ta))
		1459	{
		1460	TRANSFER (ta);
		1461	return 1;
		1462	}
		1463	else
		1464	return 0;
		1465	}
		1466
		1467	static void
		1468	api_trace (SV *coro_sv, int flags)
		1469	{
		1470	dTHX;
		1471	struct coro *coro = SvSTATE (coro_sv);
		1472
		1473	if (flags & CC_TRACE)
		1474	{
		1475	if (!coro->cctx)
		1476	coro->cctx = cctx_new ();
		1477	else if (!(coro->cctx->flags & CC_TRACE))
		1478	croak ("cannot enable tracing on coroutine with custom stack");
		1479
		1480	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1481	}
		1482	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1483	{
		1484	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1485
		1486	if (coro->flags & CF_RUNNING)
		1487	PL_runops = RUNOPS_DEFAULT;
		1488	else
		1489	coro->slot->runops = RUNOPS_DEFAULT;
		1490	}
		1491	}
		1492
985	MODULE = Coro::State PACKAGE = Coro::State	1493	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
986		1494
987	PROTOTYPES: DISABLE	1495	PROTOTYPES: DISABLE
988		1496
989	BOOT:	1497	BOOT:
990	{	1498	{
991	#ifdef USE_ITHREADS	1499	#ifdef USE_ITHREADS
992	MUTEX_INIT (&coro_mutex);	1500	MUTEX_INIT (&coro_mutex);
993	#endif	1501	#endif
994	BOOT_PAGESIZE;	1502	BOOT_PAGESIZE;
995		1503
		1504	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1505	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1506
		1507	hv_sig = coro_get_hv ("SIG", TRUE);
		1508	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1509	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1510
		1511	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1512	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1513
996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1514	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997		1515
998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1000	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1519	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1001		1520
1002	main_mainstack = PL_mainstack;	1521	main_mainstack = PL_mainstack;
		1522	main_top_env = PL_top_env;
		1523
		1524	while (main_top_env->je_prev)
		1525	main_top_env = main_top_env->je_prev;
1003		1526
1004	coroapi.ver = CORO_API_VERSION;	1527	coroapi.ver = CORO_API_VERSION;
1005	coroapi.transfer = api_transfer;	1528	coroapi.transfer = api_transfer;
1006
1007	Newz (0, main_stack, 1, coro_stack);
1008	main_stack->idle_sp = (void *)-1;
1009		1529
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1530	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011	}	1531	}
1012		1532
1013	SV *	1533	SV *
…		…
1017	struct coro *coro;	1537	struct coro *coro;
1018	HV *hv;	1538	HV *hv;
1019	int i;	1539	int i;
1020		1540
1021	Newz (0, coro, 1, struct coro);	1541	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1542	coro->args = newAV ();
		1543	coro->flags = CF_NEW;
1023		1544
		1545	if (coro_first) coro_first->prev = coro;
		1546	coro->next = coro_first;
		1547	coro_first = coro;
		1548
1024	hv = newHV ();	1549	coro->hv = hv = newHV ();
1025	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1550	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1551	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1552
		1553	av_extend (coro->args, items - 1);
1028	for (i = 1; i < items; i++)	1554	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1555	av_push (coro->args, newSVsv (ST (i)));
1030
1031	coro->stack = main_stack;
1032	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1033	/*coro->stack = 0;*/
1034	}	1556	}
1035	OUTPUT:	1557	OUTPUT:
1036	RETVAL	1558	RETVAL
1037		1559
		1560	# these not obviously related functions are all rolled into the same xs
		1561	# function to increase chances that they all will call transfer with the same
		1562	# stack offset
1038	void	1563	void
1039	transfer (...)	1564	_set_stacklevel (...)
1040	ALIAS:	1565	ALIAS:
1041	Coro::schedule = 1	1566	Coro::State::transfer = 1
1042	Coro::cede = 2	1567	Coro::schedule = 2
1043	_set_stacklevel = 3	1568	Coro::cede = 3
		1569	Coro::cede_notself = 4
		1570	Coro::Event::next = 5
		1571	Coro::Event::next_cancel = 6
1044	CODE:	1572	PPCODE:
1045	{	1573	{
1046	struct transfer_args ta;	1574	struct transfer_args ta;
		1575	int repeat = 0;
1047		1576
1048	switch (ix)	1577	do
1049	{	1578	{
		1579	switch (ix)
		1580	{
1050	case 0:	1581	case 0:
1051	if (items != 3)
1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1053
1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055	break;
1056
1057	case 1:
1058	prepare_schedule (&ta);
1059	break;
1060
1061	case 2:
1062	prepare_cede (&ta);
1063	break;
1064
1065	case 3:
1066	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1582	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1067	ta.next = 0;	1583	ta.next = 0;
1068	ta.flags = TRANSFER_SET_STACKLEVEL;
1069	break;	1584	break;
		1585
		1586	case 1:
		1587	if (items != 2)
		1588	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1589
		1590	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1591	break;
		1592
		1593	case 2:
		1594	prepare_schedule (aTHX_ &ta);
		1595	break;
		1596
		1597	case 3:
		1598	prepare_cede (aTHX_ &ta);
		1599	break;
		1600
		1601	case 4:
		1602	if (!prepare_cede_notself (aTHX_ &ta))
		1603	XSRETURN_EMPTY;
		1604
		1605	break;
		1606
		1607	case 5:
		1608	case 6:
		1609	if (items != 1)
		1610	croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
		1611
		1612	{
		1613	SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
		1614
		1615	if (ev)
		1616	{
		1617	if (GIMME_V != G_VOID)
		1618	{
		1619	XPUSHs (ev);
		1620	XSRETURN (1);
		1621	}
		1622	else
		1623	XSRETURN_EMPTY;
		1624	}
		1625	}
		1626
		1627	prepare_schedule (aTHX_ &ta);
		1628	repeat = 1;
		1629	break;
		1630	}
		1631
		1632	BARRIER;
		1633	TRANSFER (ta);
		1634	BARRIER;
1070	}	1635	}
		1636	while (repeat);
1071		1637
1072	TRANSFER (ta);	1638	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1639	XSRETURN_YES;
1073	}	1640	}
1074		1641
1075	void	1642	bool
1076	_clone_state_from (SV *dst, SV *src)	1643	_destroy (SV *coro_sv)
1077	CODE:	1644	CODE:
1078	{	1645	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1079	struct coro *coro_src = SvSTATE (src);	1646	OUTPUT:
1080		1647	RETVAL
1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082
1083	++coro_src->refcnt;
1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1085	}
1086
1087	void
1088	_nonlocal_goto (IV nextop)
1089	CODE:
1090	/* uuh, somebody will kill me again for this */
1091	PL_op->op_next = INT2PTR (OP *, nextop);
1092		1648
1093	void	1649	void
1094	_exit (code)	1650	_exit (code)
1095	int code	1651	int code
1096	PROTOTYPE: $	1652	PROTOTYPE: $
1097	CODE:	1653	CODE:
1098	_exit (code);	1654	_exit (code);
1099		1655
1100	MODULE = Coro::State PACKAGE = Coro::Cont	1656	int
		1657	cctx_stacksize (int new_stacksize = 0)
		1658	CODE:
		1659	RETVAL = coro_stacksize;
		1660	if (new_stacksize)
		1661	coro_stacksize = new_stacksize;
		1662	OUTPUT:
		1663	RETVAL
		1664
		1665	int
		1666	cctx_count ()
		1667	CODE:
		1668	RETVAL = cctx_count;
		1669	OUTPUT:
		1670	RETVAL
		1671
		1672	int
		1673	cctx_idle ()
		1674	CODE:
		1675	RETVAL = cctx_idle;
		1676	OUTPUT:
		1677	RETVAL
1101		1678
1102	void	1679	void
1103	yield (...)	1680	list ()
1104	PROTOTYPE: @	1681	PPCODE:
		1682	{
		1683	struct coro *coro;
		1684	for (coro = coro_first; coro; coro = coro->next)
		1685	if (coro->hv)
		1686	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1687	}
		1688
		1689	void
		1690	call (Coro::State coro, SV *coderef)
		1691	ALIAS:
		1692	eval = 1
		1693	CODE:
		1694	{
		1695	if (coro->mainstack)
		1696	{
		1697	struct coro temp;
		1698
		1699	if (!(coro->flags & CF_RUNNING))
		1700	{
		1701	save_perl (aTHX_ &temp);
		1702	load_perl (aTHX_ coro);
		1703	}
		1704
		1705	{
		1706	dSP;
		1707	ENTER;
		1708	SAVETMPS;
		1709	PUSHMARK (SP);
		1710	PUTBACK;
		1711
		1712	if (ix)
		1713	eval_sv (coderef, 0);
		1714	else
		1715	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1716
		1717	SPAGAIN;
		1718	FREETMPS;
		1719	LEAVE;
		1720	PUTBACK;
		1721	}
		1722
		1723	if (!(coro->flags & CF_RUNNING))
		1724	{
		1725	save_perl (aTHX_ coro);
		1726	load_perl (aTHX_ &temp);
		1727	}
		1728	}
		1729	}
		1730
		1731	SV *
		1732	is_ready (Coro::State coro)
		1733	PROTOTYPE: $
		1734	ALIAS:
		1735	is_ready = CF_READY
		1736	is_running = CF_RUNNING
		1737	is_new = CF_NEW
		1738	is_destroyed = CF_DESTROYED
		1739	CODE:
		1740	RETVAL = boolSV (coro->flags & ix);
		1741	OUTPUT:
		1742	RETVAL
		1743
		1744	void
		1745	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1746
		1747	SV *
		1748	has_stack (Coro::State coro)
		1749	PROTOTYPE: $
		1750	CODE:
		1751	RETVAL = boolSV (!!coro->cctx);
		1752	OUTPUT:
		1753	RETVAL
		1754
		1755	int
		1756	is_traced (Coro::State coro)
		1757	PROTOTYPE: $
		1758	CODE:
		1759	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1760	OUTPUT:
		1761	RETVAL
		1762
		1763	IV
		1764	rss (Coro::State coro)
		1765	PROTOTYPE: $
		1766	ALIAS:
		1767	usecount = 1
1105	CODE:	1768	CODE:
1106	{	1769	switch (ix)
1107	SV *yieldstack;	1770	{
1108	SV *sv;	1771	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1109	AV *defav = GvAV (PL_defgv);	1772	case 1: RETVAL = coro->usecount; break;
1110	struct coro *prev, *next;
1111
1112	yieldstack = *hv_fetch (
1113	(HV *)SvRV (GvSV (coro_current)),
1114	"yieldstack", sizeof ("yieldstack") - 1,
1115	0	1773	}
1116	);	1774	OUTPUT:
		1775	RETVAL
1117		1776
1118	/* set up @_ -- ugly */
1119	av_clear (defav);
1120	av_fill (defav, items - 1);
1121	while (items--)
1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124	sv = av_pop ((AV *)SvRV (yieldstack));
1125	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1126	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1127	SvREFCNT_dec (sv);
1128
1129	coro_state_transfer (aTHX_ prev, next, 0);
1130	}
1131		1777
1132	MODULE = Coro::State PACKAGE = Coro	1778	MODULE = Coro::State PACKAGE = Coro
1133		1779
1134	BOOT:	1780	BOOT:
1135	{	1781	{
1136	int i;	1782	int i;
1137		1783
		1784	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1785	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1786	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1787
		1788	coro_current = coro_get_sv ("Coro::current", FALSE);
		1789	SvREADONLY_on (coro_current);
		1790
1138	coro_stash = gv_stashpv ("Coro", TRUE);	1791	coro_stash = gv_stashpv ("Coro", TRUE);
1139		1792
1140	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1793	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1141	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1794	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1795	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1796	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1797	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1798	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146		1799
1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1149
1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1800	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151	coro_ready[i] = newAV ();	1801	coro_ready[i] = newAV ();
1152		1802
1153	{	1803	{
1154	SV *sv = perl_get_sv("Coro::API", 1);	1804	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1805	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1155		1806
1156	coroapi.schedule = api_schedule;	1807	coroapi.schedule = api_schedule;
1157	coroapi.cede = api_cede;	1808	coroapi.cede = api_cede;
		1809	coroapi.cede_notself = api_cede_notself;
1158	coroapi.ready = api_ready;	1810	coroapi.ready = api_ready;
		1811	coroapi.is_ready = api_is_ready;
1159	coroapi.nready = &coro_nready;	1812	coroapi.nready = &coro_nready;
1160	coroapi.current = coro_current;	1813	coroapi.current = coro_current;
1161		1814
1162	GCoroAPI = &coroapi;	1815	GCoroAPI = &coroapi;
1163	sv_setiv (sv, (IV)&coroapi);	1816	sv_setiv (sv, (IV)&coroapi);
1164	SvREADONLY_on (sv);	1817	SvREADONLY_on (sv);
1165	}	1818	}
1166	}	1819	}
		1820
		1821	void
		1822	_set_current (SV *current)
		1823	PROTOTYPE: $
		1824	CODE:
		1825	SvREFCNT_dec (SvRV (coro_current));
		1826	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1167		1827
1168	int	1828	int
1169	prio (Coro::State coro, int newprio = 0)	1829	prio (Coro::State coro, int newprio = 0)
1170	ALIAS:	1830	ALIAS:
1171	nice = 1	1831	nice = 1
…		…
1174	RETVAL = coro->prio;	1834	RETVAL = coro->prio;
1175		1835
1176	if (items > 1)	1836	if (items > 1)
1177	{	1837	{
1178	if (ix)	1838	if (ix)
1179	newprio += coro->prio;	1839	newprio = coro->prio - newprio;
1180		1840
1181	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1841	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1182	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1842	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1183		1843
1184	coro->prio = newprio;	1844	coro->prio = newprio;
1185	}	1845	}
1186	}	1846	}
		1847	OUTPUT:
		1848	RETVAL
1187		1849
1188	void	1850	SV *
1189	ready (SV *self)	1851	ready (SV *self)
1190	PROTOTYPE: $	1852	PROTOTYPE: $
1191	CODE:	1853	CODE:
1192	api_ready (self);	1854	RETVAL = boolSV (api_ready (self));
		1855	OUTPUT:
		1856	RETVAL
1193		1857
1194	int	1858	int
1195	nready (...)	1859	nready (...)
1196	PROTOTYPE:	1860	PROTOTYPE:
1197	CODE:	1861	CODE:
1198	RETVAL = coro_nready;	1862	RETVAL = coro_nready;
1199	OUTPUT:	1863	OUTPUT:
1200	RETVAL	1864	RETVAL
1201		1865
		1866	void
		1867	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1868	PROTOTYPE: $;$
		1869	CODE:
		1870	SvREFCNT_dec (self->throw);
		1871	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1872
		1873	# for async_pool speedup
		1874	void
		1875	_pool_1 (SV *cb)
		1876	CODE:
		1877	{
		1878	struct coro *coro = SvSTATE (coro_current);
		1879	HV *hv = (HV *)SvRV (coro_current);
		1880	AV *defav = GvAV (PL_defgv);
		1881	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1882	AV *invoke_av;
		1883	int i, len;
		1884
		1885	if (!invoke)
		1886	croak ("\3async_pool terminate\2\n");
		1887
		1888	SvREFCNT_dec (coro->saved_deffh);
		1889	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1890
		1891	hv_store (hv, "desc", sizeof ("desc") - 1,
		1892	newSVpvn (strpair ("[async_pool]")), 0);
		1893
		1894	invoke_av = (AV *)SvRV (invoke);
		1895	len = av_len (invoke_av);
		1896
		1897	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1898
		1899	if (len > 0)
		1900	{
		1901	av_fill (defav, len - 1);
		1902	for (i = 0; i < len; ++i)
		1903	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1904	}
		1905
		1906	SvREFCNT_dec (invoke);
		1907	}
		1908
		1909	void
		1910	_pool_2 (SV *cb)
		1911	CODE:
		1912	{
		1913	struct coro *coro = SvSTATE (coro_current);
		1914
		1915	sv_setsv (cb, &PL_sv_undef);
		1916
		1917	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1918	coro->saved_deffh = 0;
		1919
		1920	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1921	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1922	croak ("\3async_pool terminate\2\n");
		1923
		1924	av_clear (GvAV (PL_defgv));
		1925	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1926	newSVpvn (strpair ("[async_pool idle]")), 0);
		1927
		1928	coro->prio = 0;
		1929
		1930	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1931	api_trace (coro_current, 0);
		1932
		1933	av_push (av_async_pool, newSVsv (coro_current));
		1934	}
		1935
		1936
1202	MODULE = Coro::State PACKAGE = Coro::AIO	1937	MODULE = Coro::State PACKAGE = Coro::AIO
1203		1938
1204	SV *	1939	SV *
1205	_get_state ()	1940	_get_state ()
1206	CODE:	1941	CODE:
1207	{	1942	{
1208	struct {	1943	struct io_state *data;
1209	int errorno;
1210	int laststype;
1211	int laststatval;
1212	Stat_t statcache;
1213	} data;
1214		1944
		1945	RETVAL = newSV (sizeof (struct io_state));
		1946	data = (struct io_state *)SvPVX (RETVAL);
		1947	SvCUR_set (RETVAL, sizeof (struct io_state));
		1948	SvPOK_only (RETVAL);
		1949
1215	data.errorno = errno;	1950	data->errorno = errno;
1216	data.laststype = PL_laststype;	1951	data->laststype = PL_laststype;
1217	data.laststatval = PL_laststatval;	1952	data->laststatval = PL_laststatval;
1218	data.statcache = PL_statcache;	1953	data->statcache = PL_statcache;
1219
1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
1221	}	1954	}
1222	OUTPUT:	1955	OUTPUT:
1223	RETVAL	1956	RETVAL
1224		1957
1225	void	1958	void
1226	_set_state (char *data_)	1959	_set_state (char *data_)
1227	PROTOTYPE: $	1960	PROTOTYPE: $
1228	CODE:	1961	CODE:
1229	{	1962	{
1230	struct {	1963	struct io_state *data = (void *)data_;
1231	int errorno;
1232	int laststype;
1233	int laststatval;
1234	Stat_t statcache;
1235	} *data = (void *)data_;
1236		1964
1237	errno = data->errorno;	1965	errno = data->errorno;
1238	PL_laststype = data->laststype;	1966	PL_laststype = data->laststype;
1239	PL_laststatval = data->laststatval;	1967	PL_laststatval = data->laststatval;
1240	PL_statcache = data->statcache;	1968	PL_statcache = data->statcache;
1241	}	1969	}
		1970

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