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Comparing Coro/Coro/State.xs (file contents):
Revision 1.91 by root, Sat Nov 25 01:14:11 2006 UTC vs.
Revision 1.222 by root, Sun Jan 20 10:22:07 2008 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	#include <inttypes.h> /* portable stdint.h */
		16
		17	#ifdef HAVE_MMAP
		18	# include <unistd.h>
		19	# include <sys/mman.h>
		20	# ifndef MAP_ANONYMOUS
		21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
		23	# else
		24	# undef HAVE_MMAP
		25	# endif
		26	# endif
		27	# include <limits.h>
		28	# ifndef PAGESIZE
		29	# define PAGESIZE pagesize
		30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		31	static long pagesize;
		32	# else
		33	# define BOOT_PAGESIZE (void)0
		34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
		39
		40	#if CORO_USE_VALGRIND
		41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	|| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
14	# endif	59	# endif
15	# ifndef call_sv	60	# ifndef call_sv
16	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
29	# endif	74	# endif
30	#endif	75	#endif
31		76
32	#include <errno.h>	77	/* 5.8.7 */
		78	#ifndef SvRV_set
		79	# define SvRV_set(s,v) SvRV(s) = (v)
		80	#endif
		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
33		89
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	91	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	92	#endif
52	# include <limits.h>	93
53	# ifndef PAGESIZE	94	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	95	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	96	#endif
60	#endif
61		97
62	#define SUB_INIT "Coro::State::initialize"	98	/* prefer perl internal functions over our own? */
		99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
63		102
64	/* The next macro should declare a variable stacklevel that contains and approximation	103	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	104	* portable way as possible. */
66	* and should be unique. */	105	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	106	#define STACKLEVEL ((void *)&stacklevel)
68		107
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		109
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	110	#if __GNUC__ >= 3
		111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
		114	#else
		115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
		118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
		122
		123	#define NOINLINE attribute ((noinline))
72		124
73	#include "CoroAPI.h"	125	#include "CoroAPI.h"
74		126
75	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
…		…
79	#else	131	#else
80	# define LOCK (void)0	132	# define LOCK (void)0
81	# define UNLOCK (void)0	133	# define UNLOCK (void)0
82	#endif	134	#endif
83		135
		136	/* helper storage struct for Coro::AIO */
		137	struct io_state
		138	{
		139	int errorno;
		140	I32 laststype;
		141	int laststatval;
		142	Stat_t statcache;
		143	};
		144
		145	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	147	static AV *main_mainstack; /* used to differentiate between $main and others */
		148	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	150	static volatile SV *coro_mortal; /* will be freed after next transfer */
88		151
89	/* this is actually not just the c stack but also c registers etc... */	152	static GV *irsgv; /* $/ */
		153	static GV *stdoutgv; /* *STDOUT */
		154	static SV *rv_diehook;
		155	static SV *rv_warnhook;
		156	static HV *hv_sig; /* %SIG */
		157
		158	/* async_pool helper stuff */
		159	static SV *sv_pool_rss;
		160	static SV *sv_pool_size;
		161	static AV *av_async_pool;
		162
		163	static struct coro_cctx *cctx_first;
		164	static int cctx_count, cctx_idle;
		165
		166	enum {
		167	CC_MAPPED = 0x01,
		168	CC_NOREUSE = 0x02, /* throw this away after tracing */
		169	CC_TRACE = 0x04,
		170	CC_TRACE_SUB = 0x08, /* trace sub calls */
		171	CC_TRACE_LINE = 0x10, /* trace each statement */
		172	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		173	};
		174
		175	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	176	typedef struct coro_cctx {
91	struct coro_stack *next;	177	struct coro_cctx *next;
92		178
93	void *idle_sp;	179	/* the stack */
94	void *sptr;	180	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	181	size_t ssize;
96		182
97	/* cpu state */	183	/* cpu state */
		184	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		185	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		186	JMPENV *top_env;
98	coro_context cctx;	187	coro_context cctx;
99	} coro_stack;
100		188
101	static coro_stack *main_stack;	189	#if CORO_USE_VALGRIND
		190	int valgrind_id;
		191	#endif
		192	unsigned char flags;
		193	} coro_cctx;
102		194
		195	enum {
		196	CF_RUNNING = 0x0001, /* coroutine is running */
		197	CF_READY = 0x0002, /* coroutine is ready */
		198	CF_NEW = 0x0004, /* has never been switched to */
		199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		200	};
		201
		202	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		203	typedef struct {
		204	SV *defsv;
		205	AV *defav;
		206	SV *errsv;
		207	SV *irsgv;
		208	#define VAR(name,type) type name;
		209	# include "state.h"
		210	#undef VAR
		211	} perl_slots;
		212
		213	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		214
		215	/* this is a structure representing a perl-level coroutine */
103	struct coro {	216	struct coro {
104	/* optionally saved, might be zero */	217	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	218	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112		219
113	/* the c stack, if any */	220	/* process data */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;	221	AV *mainstack;
120	SV **stack_sp;	222	perl_slots *slot; /* basically the saved sp */
121	OP *op;	223
122	SV **curpad;	224	AV *args; /* data associated with this coroutine (initial args) */
123	AV *comppad;	225	int refcnt; /* coroutines are refcounted, yes */
124	CV *compcv;	226	int flags; /* CF_ flags */
125	SV **stack_base;	227	HV *hv; /* the perl hash associated with this coro, if any */
126	SV **stack_max;	228
127	SV **tmps_stack;	229	/* statistics */
128	I32 tmps_floor;	230	int usecount; /* number of transfers to this coro */
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146		231
147	/* coro process data */	232	/* coro process data */
148	int prio;	233	int prio;
		234	SV *throw; /* exception to be thrown */
149		235
150	/* data associated with this coroutine (initial args) */	236	/* async_pool */
151	AV *args;	237	SV *saved_deffh;
152	int refcnt;	238
		239	/* linked list */
		240	struct coro *next, *prev;
153	};	241	};
154		242
155	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
157		245
		246	/** Coro ********************************************************************/
		247
		248	#define PRIO_MAX 3
		249	#define PRIO_HIGH 1
		250	#define PRIO_NORMAL 0
		251	#define PRIO_LOW -1
		252	#define PRIO_IDLE -3
		253	#define PRIO_MIN -4
		254
		255	/* for Coro.pm */
		256	static SV *coro_current;
		257	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		258	static int coro_nready;
		259	static struct coro *coro_first;
		260
		261	/** lowlevel stuff **********************************************************/
		262
		263	static SV *
		264	coro_get_sv (pTHX_ const char *name, int create)
		265	{
		266	#if PERL_VERSION_ATLEAST (5,9,0)
		267	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		268	get_sv (name, create);
		269	#endif
		270	return get_sv (name, create);
		271	}
		272
		273	static AV *
		274	coro_get_av (pTHX_ const char *name, int create)
		275	{
		276	#if PERL_VERSION_ATLEAST (5,9,0)
		277	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		278	get_av (name, create);
		279	#endif
		280	return get_av (name, create);
		281	}
		282
		283	static HV *
		284	coro_get_hv (pTHX_ const char *name, int create)
		285	{
		286	#if PERL_VERSION_ATLEAST (5,9,0)
		287	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		288	get_hv (name, create);
		289	#endif
		290	return get_hv (name, create);
		291	}
		292
158	static AV *	293	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
160	{	295	{
161	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
163		298
164	newpadlist = newAV ();	299	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	300	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	301	#if PERL_VERSION_ATLEAST (5,9,0)
		302	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		303	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	305	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	306	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	307	--AvFILLp (padlist);
173		308
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	309	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
209		344
210	/* casting is fun. */	345	/* casting is fun. */
211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212	free_padlist (aTHX_ padlist);	347	free_padlist (aTHX_ padlist);
213		348
214	SvREFCNT_dec (av);
215
216	return 0;	349	return 0;
217	}	350	}
218		351
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	352	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		353	#define CORO_MAGIC_type_state PERL_MAGIC_ext
220		354
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	355	static MGVTBL coro_cv_vtbl = {
		356	0, 0, 0, 0,
		357	coro_cv_free
		358	};
		359
		360	#define CORO_MAGIC(sv,type) \
		361	SvMAGIC (sv) \
		362	? SvMAGIC (sv)->mg_type == type \
		363	? SvMAGIC (sv) \
		364	: mg_find (sv, type) \
		365	: 0
		366
		367	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		368	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		369
		370	static struct coro *
		371	SvSTATE_ (pTHX_ SV *coro)
		372	{
		373	HV *stash;
		374	MAGIC *mg;
		375
		376	if (SvROK (coro))
		377	coro = SvRV (coro);
		378
		379	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		380	croak ("Coro::State object required");
		381
		382	stash = SvSTASH (coro);
		383	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		384	{
		385	/* very slow, but rare, check */
		386	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		387	croak ("Coro::State object required");
		388	}
		389
		390	mg = CORO_MAGIC_state (coro);
		391	return (struct coro *)mg->mg_ptr;
		392	}
		393
		394	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
222		395
223	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
224	static void	397	static void
225	get_padlist (pTHX_ CV *cv)	398	get_padlist (pTHX_ CV *cv)
226	{	399	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
		401	AV *av;
228		402
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	405	else
232	{	406	{
233	#if 0	407	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	408	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	409	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
239	#else	413	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	417	}
244		418
245	static void	419	static void
246	put_padlist (pTHX_ CV *cv)	420	put_padlist (pTHX_ CV *cv)
247	{	421	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
		423	AV *av;
249		424
250	if (!mg)	425	if (expect_false (!mg))
251	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();
256	}
257		427
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	428	av = (AV *)mg->mg_obj;
259	}
260		429
261	#define SB do {	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	431	av_extend (av, AvMAX (av) + 1);
263		432
264	#define LOAD(state) load_state(aTHX_ (state));	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	434	}
266		435
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	436	/** load & save, init *******************************************************/
268		437
269	static void	438	static void
270	load_state(pTHX_ Coro__State c)	439	load_perl (pTHX_ Coro__State c)
271	{	440	{
272	PL_dowarn = c->dowarn;	441	perl_slots *slot = c->slot;
273	PL_in_eval = c->in_eval;	442	c->slot = 0;
274		443
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;	444	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		445
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	446	GvSV (PL_defgv) = slot->defsv;
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	447	GvAV (PL_defgv) = slot->defav;
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	448	GvSV (PL_errgv) = slot->errsv;
		449	GvSV (irsgv) = slot->irsgv;
		450
		451	#define VAR(name,type) PL_ ## name = slot->name;
		452	# include "state.h"
		453	#undef VAR
310		454
311	{	455	{
312	dSP;	456	dSP;
		457
313	CV *cv;	458	CV *cv;
314		459
315	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
317	{	462	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	464	CvDEPTH (cv) = PTR2IV (POPs);
324	}	465	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	466	}
328		467
329	PUTBACK;	468	PUTBACK;
330	}	469	}
331	}	470	}
332		471
333	static void	472	static void
334	save_state(pTHX_ Coro__State c, int flags)	473	save_perl (pTHX_ Coro__State c)
335	{	474	{
336	{	475	{
337	dSP;	476	dSP;
338	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	481	/*
343	* the worst thing you can imagine happens first - we have to save	482	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
345	*/	484	*/
346		485
347	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
349	for (;;)	488	for (;;)
350	{	489	{
351	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
352	{	491	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
354		493
355	if (CxTYPE(cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356	{	495	{
357	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
		497
358	if (CvDEPTH(cv))	498	if (expect_true (CvDEPTH (cv)))
359	{	499	{
360	EXTEND (SP, CvDEPTH(cv)*2);	500	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	501	PUSHs ((SV *)CvPADLIST (cv));
		502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
371		504
		505	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	506	get_padlist (aTHX_ cv);
373	}	507	}
374	}	508	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	509	}
384		510
385	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
386	break;	512	break;
387		513
388	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
391	}	517	}
392		518
393	PUTBACK;	519	PUTBACK;
394	}	520	}
395		521
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	524	if (SLOT_COUNT >= 1) CXINC;
		525	if (SLOT_COUNT >= 2) CXINC;
		526	if (SLOT_COUNT >= 3) CXINC;
		527	{
		528	int i;
		529	for (i = 3; i < SLOT_COUNT; ++i)
		530	CXINC;
		531	}
		532	cxstack_ix -= SLOT_COUNT; /* undo allocation */
399		533
400	c->dowarn = PL_dowarn;
401	c->in_eval = PL_in_eval;
402
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;	534	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;	535
407	c->op = PL_op;	536	{
408	c->curpad = PL_curpad;	537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409	c->comppad = PL_comppad;	538
410	c->compcv = PL_compcv;	539	slot->defav = GvAV (PL_defgv);
411	c->stack_base = PL_stack_base;	540	slot->defsv = DEFSV;
412	c->stack_max = PL_stack_max;	541	slot->errsv = ERRSV;
413	c->tmps_stack = PL_tmps_stack;	542	slot->irsgv = GvSV (irsgv);
414	c->tmps_floor = PL_tmps_floor;	543
415	c->tmps_ix = PL_tmps_ix;	544	#define VAR(name,type) slot->name = PL_ ## name;
416	c->tmps_max = PL_tmps_max;	545	# include "state.h"
417	c->markstack = PL_markstack;	546	#undef VAR
418	c->markstack_ptr = PL_markstack_ptr;	547	}
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	548	}
435		549
436	/*	550	/*
437	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
441	*/	555	*/
		556	#if CORO_PREFER_PERL_FUNCTIONS
		557	# define coro_init_stacks init_stacks
		558	#else
442	static void	559	static void
443	coro_init_stacks (pTHX)	560	coro_init_stacks (pTHX)
444	{	561	{
445	LOCK;	562	PL_curstackinfo = new_stackinfo(32, 8);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		566
452	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		570
456	New(50,PL_tmps_stack,96,SV*);	571	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	574	PL_tmps_max = 32;
460		575
461	New(54,PL_markstack,16,I32);	576	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	578	PL_markstack_max = PL_markstack + 16;
464		579
465	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
467	#endif	582	#endif
468		583
469	New(54,PL_scopestack,16,I32);	584	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	586	PL_scopestack_max = 8;
472		587
473	New(54,PL_savestack,96,ANY);	588	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	590	PL_savestack_max = 24;
476		591
477	#if PERL_VERSION < 9	592	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	593	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	595	PL_retstack_max = 4;
481	#endif	596	#endif
482
483	UNLOCK;
484	}	597	}
		598	#endif
485		599
486	/*	600	/*
487	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
488	*/	602	*/
489	static void	603	static void
490	destroy_stacks(pTHX)	604	coro_destroy_stacks (pTHX)
491	{	605	{
492	if (!IN_DESTRUCT)
493	{
494	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);
496
497	/* sure it is, but more important: is it correct?? :/ */
498	FREETMPS;
499
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501	}
502
503	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
505		608
506	while (PL_curstackinfo)	609	while (PL_curstackinfo)
507	{	610	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	611	PERL_SI *p = PL_curstackinfo->si_prev;
509		612
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	613	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	614	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		615
522	Safefree (PL_curstackinfo->si_cxstack);	616	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	617	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	618	PL_curstackinfo = p;
525	}	619	}
526		620
527	Safefree (PL_tmps_stack);	621	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	622	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	623	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	624	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	625	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	626	Safefree (PL_retstack);
533	#endif	627	#endif
534	}	628	}
535		629
		630	static size_t
		631	coro_rss (pTHX_ struct coro *coro)
		632	{
		633	size_t rss = sizeof (*coro);
		634
		635	if (coro->mainstack)
		636	{
		637	perl_slots tmp_slot;
		638	perl_slots *slot;
		639
		640	if (coro->flags & CF_RUNNING)
		641	{
		642	slot = &tmp_slot;
		643
		644	#define VAR(name,type) slot->name = PL_ ## name;
		645	# include "state.h"
		646	#undef VAR
		647	}
		648	else
		649	slot = coro->slot;
		650
		651	rss += sizeof (slot->curstackinfo);
		652	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		653	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		654	rss += slot->tmps_max * sizeof (SV *);
		655	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		656	rss += slot->scopestack_max * sizeof (I32);
		657	rss += slot->savestack_max * sizeof (ANY);
		658
		659	#if !PERL_VERSION_ATLEAST (5,9,0)
		660	rss += slot->retstack_max * sizeof (OP *);
		661	#endif
		662	}
		663
		664	return rss;
		665	}
		666
		667	/** coroutine stack handling ************************************************/
		668
		669	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		670	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		671
		672	/*
		673	* This overrides the default magic get method of %SIG elements.
		674	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		675	* and instead of tryign to save and restore the hash elements, we just provide
		676	* readback here.
		677	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		678	* not expecting this to actually change the hook. This is a potential problem
		679	* when a schedule happens then, but we ignore this.
		680	*/
		681	static int
		682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	const char *s = MgPV_nolen_const (mg);
		685
		686	if (*s == '_')
		687	{
		688	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		689	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		690	}
		691
		692	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		693	}
		694
		695	static int
		696	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		697	{
		698	const char *s = MgPV_nolen_const (mg);
		699
		700	if (*s == '_')
		701	{
		702	SV **svp = 0;
		703
		704	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		705	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		706
		707	if (svp)
		708	{
		709	SV *old = *svp;
		710	*svp = newSVsv (sv);
		711	SvREFCNT_dec (old);
		712	return;
		713	}
		714	}
		715
		716	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		717	}
		718
536	static void	719	static void
537	setup_coro (struct coro *coro)	720	coro_setup (pTHX_ struct coro *coro)
538	{	721	{
539	/*	722	/*
540	* emulate part of the perl startup here.	723	* emulate part of the perl startup here.
541	*/	724	*/
542	dTHX;	725	coro_init_stacks (aTHX);
		726
		727	PL_runops = RUNOPS_DEFAULT;
		728	PL_curcop = &PL_compiling;
		729	PL_in_eval = EVAL_NULL;
		730	PL_comppad = 0;
		731	PL_curpm = 0;
		732	PL_curpad = 0;
		733	PL_localizing = 0;
		734	PL_dirty = 0;
		735	PL_restartop = 0;
		736
		737	/* recreate the die/warn hooks */
		738	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		739	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		740
		741	GvSV (PL_defgv) = newSV (0);
		742	GvAV (PL_defgv) = coro->args; coro->args = 0;
		743	GvSV (PL_errgv) = newSV (0);
		744	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		745	PL_rs = newSVsv (GvSV (irsgv));
		746	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		747
		748	{
		749	dSP;
		750	LOGOP myop;
		751
		752	Zero (&myop, 1, LOGOP);
		753	myop.op_next = Nullop;
		754	myop.op_flags = OPf_WANT_VOID;
		755
		756	PUSHMARK (SP);
		757	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		758	PUTBACK;
		759	PL_op = (OP *)&myop;
		760	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		761	SPAGAIN;
		762	}
		763
		764	/* this newly created coroutine might be run on an existing cctx which most
		765	* likely was suspended in set_stacklevel, called from entersub.
		766	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		767	* so we ENTER here for symmetry
		768	*/
		769	ENTER;
		770	}
		771
		772	static void
		773	coro_destroy (pTHX_ struct coro *coro)
		774	{
		775	if (!IN_DESTRUCT)
		776	{
		777	/* restore all saved variables and stuff */
		778	LEAVE_SCOPE (0);
		779	assert (PL_tmps_floor == -1);
		780
		781	/* free all temporaries */
		782	FREETMPS;
		783	assert (PL_tmps_ix == -1);
		784
		785	/* unwind all extra stacks */
		786	POPSTACK_TO (PL_mainstack);
		787
		788	/* unwind main stack */
		789	dounwind (-1);
		790	}
		791
		792	SvREFCNT_dec (GvSV (PL_defgv));
		793	SvREFCNT_dec (GvAV (PL_defgv));
		794	SvREFCNT_dec (GvSV (PL_errgv));
		795	SvREFCNT_dec (PL_defoutgv);
		796	SvREFCNT_dec (PL_rs);
		797	SvREFCNT_dec (GvSV (irsgv));
		798
		799	SvREFCNT_dec (PL_diehook);
		800	SvREFCNT_dec (PL_warnhook);
		801
		802	SvREFCNT_dec (coro->saved_deffh);
		803	SvREFCNT_dec (coro->throw);
		804
		805	coro_destroy_stacks (aTHX);
		806	}
		807
		808	static void
		809	free_coro_mortal (pTHX)
		810	{
		811	if (expect_true (coro_mortal))
		812	{
		813	SvREFCNT_dec (coro_mortal);
		814	coro_mortal = 0;
		815	}
		816	}
		817
		818	static int
		819	runops_trace (pTHX)
		820	{
		821	COP *oldcop = 0;
		822	int oldcxix = -2;
		823	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		824	coro_cctx *cctx = coro->cctx;
		825
		826	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		827	{
		828	PERL_ASYNC_CHECK ();
		829
		830	if (cctx->flags & CC_TRACE_ALL)
		831	{
		832	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		833	{
		834	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		835	SV **bot, **top;
		836	AV *av = newAV (); /* return values */
		837	SV **cb;
		838	dSP;
		839
		840	GV *gv = CvGV (cx->blk_sub.cv);
		841	SV *fullname = sv_2mortal (newSV (0));
		842	if (isGV (gv))
		843	gv_efullname3 (fullname, gv, 0);
		844
		845	bot = PL_stack_base + cx->blk_oldsp + 1;
		846	top = cx->blk_gimme == G_ARRAY ? SP + 1
		847	: cx->blk_gimme == G_SCALAR ? bot + 1
		848	: bot;
		849
		850	av_extend (av, top - bot);
		851	while (bot < top)
		852	av_push (av, SvREFCNT_inc (*bot++));
		853
		854	PL_runops = RUNOPS_DEFAULT;
		855	ENTER;
		856	SAVETMPS;
		857	EXTEND (SP, 3);
		858	PUSHMARK (SP);
		859	PUSHs (&PL_sv_no);
		860	PUSHs (fullname);
		861	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		862	PUTBACK;
		863	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		864	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		865	SPAGAIN;
		866	FREETMPS;
		867	LEAVE;
		868	PL_runops = runops_trace;
		869	}
		870
		871	if (oldcop != PL_curcop)
		872	{
		873	oldcop = PL_curcop;
		874
		875	if (PL_curcop != &PL_compiling)
		876	{
		877	SV **cb;
		878
		879	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		880	{
		881	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		882
		883	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		884	{
		885	runops_proc_t old_runops = PL_runops;
		886	dSP;
		887	GV *gv = CvGV (cx->blk_sub.cv);
		888	SV *fullname = sv_2mortal (newSV (0));
		889
		890	if (isGV (gv))
		891	gv_efullname3 (fullname, gv, 0);
		892
		893	PL_runops = RUNOPS_DEFAULT;
		894	ENTER;
		895	SAVETMPS;
		896	EXTEND (SP, 3);
		897	PUSHMARK (SP);
		898	PUSHs (&PL_sv_yes);
		899	PUSHs (fullname);
		900	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		901	PUTBACK;
		902	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		903	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		904	SPAGAIN;
		905	FREETMPS;
		906	LEAVE;
		907	PL_runops = runops_trace;
		908	}
		909
		910	oldcxix = cxstack_ix;
		911	}
		912
		913	if (cctx->flags & CC_TRACE_LINE)
		914	{
		915	dSP;
		916
		917	PL_runops = RUNOPS_DEFAULT;
		918	ENTER;
		919	SAVETMPS;
		920	EXTEND (SP, 3);
		921	PL_runops = RUNOPS_DEFAULT;
		922	PUSHMARK (SP);
		923	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		924	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		925	PUTBACK;
		926	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		927	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		928	SPAGAIN;
		929	FREETMPS;
		930	LEAVE;
		931	PL_runops = runops_trace;
		932	}
		933	}
		934	}
		935	}
		936	}
		937
		938	TAINT_NOT;
		939	return 0;
		940	}
		941
		942	/* inject a fake call to Coro::State::_cctx_init into the execution */
		943	/* _cctx_init should be careful, as it could be called at almost any time */
		944	/* during execution of a perl program */
		945	static void NOINLINE
		946	cctx_prepare (pTHX_ coro_cctx *cctx)
		947	{
543	dSP;	948	dSP;
544	UNOP myop;	949	LOGOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		950
547	coro_init_stacks (aTHX);	951	PL_top_env = &PL_start_env;
548	/*PL_curcop = 0;*/
549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		952
553	SPAGAIN;	953	if (cctx->flags & CC_TRACE)
		954	PL_runops = runops_trace;
554		955
555	Zero (&myop, 1, UNOP);	956	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	957	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	958	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		959
		960	PUSHMARK (SP);
		961	EXTEND (SP, 2);
		962	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		963	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		964	PUTBACK;
559	PL_op = (OP *)&myop;	965	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	966	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	967	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	968	}
569		969
		970	/*
		971	* this is a _very_ stripped down perl interpreter ;)
		972	*/
570	static void	973	static void
571	transfer_tail ()	974	cctx_run (void *arg)
572	{	975	{
573	if (coro_mortal)	976	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		977
		978	/* cctx_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	979	UNLOCK;
		980
		981	/* we now skip the entersub that lead to transfer() */
		982	PL_op = PL_op->op_next;
		983
		984	/* inject a fake subroutine call to cctx_init */
		985	cctx_prepare (aTHX_ (coro_cctx *)arg);
		986
		987	/* somebody or something will hit me for both perl_run and PL_restartop */
		988	PL_restartop = PL_op;
		989	perl_run (PL_curinterp);
		990
		991	/*
		992	* If perl-run returns we assume exit() was being called or the coro
		993	* fell off the end, which seems to be the only valid (non-bug)
		994	* reason for perl_run to return. We try to exit by jumping to the
		995	* bootstrap-time "top" top_env, as we cannot restore the "main"
		996	* coroutine as Coro has no such concept
		997	*/
		998	PL_top_env = main_top_env;
		999	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1000	}
		1001
		1002	static coro_cctx *
		1003	cctx_new ()
		1004	{
		1005	coro_cctx *cctx;
		1006	void *stack_start;
		1007	size_t stack_size;
		1008
		1009	++cctx_count;
		1010
		1011	Newz (0, cctx, 1, coro_cctx);
		1012
		1013	#if HAVE_MMAP
		1014	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1015	/* mmap supposedly does allocate-on-write for us */
		1016	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1017
		1018	if (cctx->sptr != (void *)-1)
		1019	{
		1020	# if CORO_STACKGUARD
		1021	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1022	# endif
		1023	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1024	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1025	cctx->flags |= CC_MAPPED;
		1026	}
		1027	else
		1028	#endif
		1029	{
		1030	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1031	New (0, cctx->sptr, coro_stacksize, long);
		1032
		1033	if (!cctx->sptr)
		1034	{
		1035	perror ("FATAL: unable to allocate stack for coroutine");
		1036	_exit (EXIT_FAILURE);
		1037	}
		1038
		1039	stack_start = cctx->sptr;
		1040	stack_size = cctx->ssize;
		1041	}
		1042
		1043	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1044	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1045
		1046	return cctx;
580	}	1047	}
581		1048
582	static void	1049	static void
583	coro_run (void *arg)	1050	cctx_destroy (coro_cctx *cctx)
584	{	1051	{
585	/*	1052	if (!cctx)
586	* this is a _very_ stripped down perl interpreter ;)	1053	return;
587	*/
588	dTHX;
589		1054
590	transfer_tail ();	1055	--cctx_count;
591		1056
592	PL_top_env = &PL_start_env;	1057	#if CORO_USE_VALGRIND
593	PL_restartop = PL_op;	1058	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
594	/* somebody will hit me for both perl_run and PL_restart_top */	1059	#endif
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}
599
600	static coro_stack *
601	stack_new ()
602	{
603	coro_stack *stack;
604
605	New (0, stack, 1, coro_stack);
606		1060
607	#if HAVE_MMAP	1061	#if HAVE_MMAP
		1062	if (cctx->flags & CC_MAPPED)
		1063	munmap (cctx->sptr, cctx->ssize);
		1064	else
		1065	#endif
		1066	Safefree (cctx->sptr);
608		1067
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	1068	Safefree (cctx);
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1069	}
611		1070
612	if (stack->sptr == (void *)-1)	1071	/* wether this cctx should be destructed */
613	{	1072	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	1073
615	_exit (EXIT_FAILURE);	1074	static coro_cctx *
		1075	cctx_get (pTHX)
		1076	{
		1077	while (expect_true (cctx_first))
616	}	1078	{
		1079	coro_cctx *cctx = cctx_first;
		1080	cctx_first = cctx->next;
		1081	--cctx_idle;
617		1082
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1083	if (expect_true (!CCTX_EXPIRED (cctx)))
		1084	return cctx;
619		1085
		1086	cctx_destroy (cctx);
		1087	}
		1088
		1089	return cctx_new ();
		1090	}
		1091
		1092	static void
		1093	cctx_put (coro_cctx *cctx)
		1094	{
		1095	/* free another cctx if overlimit */
		1096	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1097	{
		1098	coro_cctx *first = cctx_first;
		1099	cctx_first = first->next;
		1100	--cctx_idle;
		1101
		1102	cctx_destroy (first);
		1103	}
		1104
		1105	++cctx_idle;
		1106	cctx->next = cctx_first;
		1107	cctx_first = cctx;
		1108	}
		1109
		1110	/** coroutine switching *****************************************************/
		1111
		1112	static void
		1113	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1114	{
		1115	if (expect_true (prev != next))
		1116	{
		1117	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1118	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1119
		1120	if (expect_false (next->flags & CF_RUNNING))
		1121	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1122
		1123	if (expect_false (next->flags & CF_DESTROYED))
		1124	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1125
		1126	if (
		1127	#if PERL_VERSION_ATLEAST (5,9,0)
		1128	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
620	#else	1129	#else
621		1130	expect_false (PL_lex_state != LEX_NOTPARSING)
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630
631	#endif	1131	#endif
632		1132	)
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	1133	croak ("Coro::State::transfer called while parsing, but this is not supported");
634
635	return stack;
636	}
637
638	static void
639	stack_free (coro_stack *stack)
640	{
641	if (!stack || stack == main_stack)
642	return;
643
644	#if HAVE_MMAP
645	munmap (stack->sptr, stack->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static coro_stack *
656	stack_get ()
657	{
658	coro_stack *stack;
659
660	if (stack_first)
661	{
662	stack = stack_first;
663	stack_first = stack->next;
664	}
665	else
666	{
667	stack = stack_new ();
668	PL_op = PL_op->op_next;
669	}	1134	}
670
671	return stack;
672	}	1135	}
673		1136
674	static void	1137	/* always use the TRANSFER macro */
675	stack_put (coro_stack *stack)	1138	static void NOINLINE
676	{
677	stack->next = stack_first;
678	stack_first = stack;
679	}
680
681	/* never call directly, always through the coro_state_transfer global variable */
682	static void
683	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1139	transfer (pTHX_ struct coro *prev, struct coro *next)
684	{	1140	{
685	dSTACKLEVEL;	1141	dSTACKLEVEL;
		1142	static volatile int has_throw;
686		1143
687	/* sometimes transfer is only called to set idle_sp */	1144	/* sometimes transfer is only called to set idle_sp */
688	if (!prev->stack->idle_sp)	1145	if (expect_false (!next))
689	prev->stack->idle_sp = stacklevel;	1146	{
690		1147	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
691	LOCK;	1148	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
692
693	if (prev != next)
694	{	1149	}
695	coro_stack *prev_stack = prev->stack;	1150	else if (expect_true (prev != next))
		1151	{
		1152	coro_cctx *prev__cctx;
696		1153
697	/* possibly "free" the stack */	1154	if (expect_false (prev->flags & CF_NEW))
698	if (0 && prev_stack->idle_sp == stacklevel)
699	{	1155	{
700	stack_put (prev_stack);	1156	/* create a new empty context */
701	prev->stack = 0;	1157	Newz (0, prev->cctx, 1, coro_cctx);
		1158	prev->flags &= ~CF_NEW;
		1159	prev->flags |= CF_RUNNING;
702	}	1160	}
703		1161
704	if (next->mainstack)	1162	prev->flags &= ~CF_RUNNING;
		1163	next->flags |= CF_RUNNING;
		1164
		1165	LOCK;
		1166
		1167	/* first get rid of the old state */
		1168	save_perl (aTHX_ prev);
		1169
		1170	if (expect_false (next->flags & CF_NEW))
705	{	1171	{
706	/* coroutine already started */	1172	/* need to start coroutine */
707	SAVE (prev, flags);	1173	next->flags &= ~CF_NEW;
708	LOAD (next);	1174	/* setup coroutine call */
		1175	coro_setup (aTHX_ next);
709	}	1176	}
710	else	1177	else
		1178	load_perl (aTHX_ next);
		1179
		1180	prev__cctx = prev->cctx;
		1181
		1182	/* possibly "free" the cctx */
		1183	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
711	{	1184	{
712	/* need to start coroutine */	1185	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
713	/* first get rid of the old state */	1186	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
714	SAVE (prev, -1);	1187
715	/* setup coroutine call */	1188	prev->cctx = 0;
716	setup_coro (next);	1189
717	/* need to change stack from main_stack to real one */	1190	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
718	next->stack = 0;	1191	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1192	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1193	if (!next->cctx)
		1194	next->cctx = cctx_get (aTHX);
		1195
		1196	cctx_put (prev__cctx);
719	}	1197	}
720		1198
721	if (!next->stack)	1199	++next->usecount;
722	next->stack = stack_get ();
723		1200
724	if (prev_stack != next->stack)	1201	if (expect_true (!next->cctx))
		1202	next->cctx = cctx_get (aTHX);
		1203
		1204	has_throw = !!next->throw;
		1205
		1206	if (expect_false (prev__cctx != next->cctx))
		1207	{
		1208	prev__cctx->top_env = PL_top_env;
		1209	PL_top_env = next->cctx->top_env;
725	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1210	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
726	}	1211	}
727		1212
728	transfer_tail ();	1213	free_coro_mortal (aTHX);
729	}	1214	UNLOCK;
730		1215
731	/* use this function pointer to call the above function */	1216	if (expect_false (has_throw))
732	/* this is done to increase chances of the compiler not inlining the call */	1217	{
733	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1218	struct coro *coro = SvSTATE (coro_current);
734		1219
		1220	if (coro->throw)
		1221	{
		1222	SV *exception = coro->throw;
		1223	coro->throw = 0;
		1224	sv_setsv (ERRSV, exception);
		1225	croak (0);
		1226	}
		1227	}
		1228	}
		1229	}
		1230
		1231	struct transfer_args
		1232	{
		1233	struct coro *prev, *next;
		1234	};
		1235
		1236	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1237	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1238
		1239	/** high level stuff ********************************************************/
		1240
735	static void	1241	static int
736	coro_state_destroy (struct coro *coro)	1242	coro_state_destroy (pTHX_ struct coro *coro)
737	{	1243	{
738	if (coro->refcnt--)	1244	if (coro->flags & CF_DESTROYED)
739	return;	1245	return 0;
		1246
		1247	coro->flags |= CF_DESTROYED;
		1248
		1249	if (coro->flags & CF_READY)
		1250	{
		1251	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1252	/* alternative: look through all ready queues and remove the coro */
		1253	LOCK;
		1254	--coro_nready;
		1255	UNLOCK;
		1256	}
		1257	else
		1258	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
740		1259
741	if (coro->mainstack && coro->mainstack != main_mainstack)	1260	if (coro->mainstack && coro->mainstack != main_mainstack)
742	{	1261	{
743	struct coro temp;	1262	struct coro temp;
744		1263
745	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1264	if (coro->flags & CF_RUNNING)
		1265	croak ("FATAL: tried to destroy currently running coroutine");
		1266
		1267	save_perl (aTHX_ &temp);
746	LOAD (aTHX_ coro);	1268	load_perl (aTHX_ coro);
747		1269
748	destroy_stacks (aTHX);	1270	coro_destroy (aTHX_ coro);
749		1271
750	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1272	load_perl (aTHX_ &temp);
751		1273
752	coro->mainstack = 0;	1274	coro->slot = 0;
753	}	1275	}
754		1276
755	stack_free (coro->stack);	1277	cctx_destroy (coro->cctx);
756	SvREFCNT_dec (coro->args);	1278	SvREFCNT_dec (coro->args);
757	Safefree (coro);	1279
		1280	if (coro->next) coro->next->prev = coro->prev;
		1281	if (coro->prev) coro->prev->next = coro->next;
		1282	if (coro == coro_first) coro_first = coro->next;
		1283
		1284	return 1;
758	}	1285	}
759		1286
760	static int	1287	static int
761	coro_state_clear (SV *sv, MAGIC *mg)	1288	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
762	{	1289	{
763	struct coro *coro = (struct coro *)mg->mg_ptr;	1290	struct coro *coro = (struct coro *)mg->mg_ptr;
764	mg->mg_ptr = 0;	1291	mg->mg_ptr = 0;
765		1292
		1293	coro->hv = 0;
		1294
		1295	if (--coro->refcnt < 0)
		1296	{
766	coro_state_destroy (coro);	1297	coro_state_destroy (aTHX_ coro);
		1298	Safefree (coro);
		1299	}
767		1300
768	return 0;	1301	return 0;
769	}	1302	}
770		1303
771	static int	1304	static int
772	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1305	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
773	{	1306	{
774	struct coro *coro = (struct coro *)mg->mg_ptr;	1307	struct coro *coro = (struct coro *)mg->mg_ptr;
775		1308
776	++coro->refcnt;	1309	++coro->refcnt;
777		1310
778	return 0;	1311	return 0;
779	}	1312	}
780		1313
781	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1314	static MGVTBL coro_state_vtbl = {
782		1315	0, 0, 0, 0,
783	static struct coro *	1316	coro_state_free,
784	SvSTATE (SV *coro)	1317	0,
785	{	1318	#ifdef MGf_DUP
786	HV *stash;	1319	coro_state_dup,
787	MAGIC *mg;	1320	#else
788		1321	# define MGf_DUP 0
789	if (SvROK (coro))	1322	#endif
790	coro = SvRV (coro);	1323	};
791
792	stash = SvSTASH (coro);
793	if (stash != coro_stash && stash != coro_state_stash)
794	{
795	/* very slow, but rare, check */
796	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
797	croak ("Coro::State object required");
798	}
799
800	mg = SvMAGIC (coro);
801	assert (mg->mg_type == PERL_MAGIC_ext);
802	return (struct coro *)mg->mg_ptr;
803	}
804		1324
805	static void	1325	static void
		1326	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1327	{
		1328	ta->prev = SvSTATE (prev_sv);
		1329	ta->next = SvSTATE (next_sv);
		1330	TRANSFER_CHECK (*ta);
		1331	}
		1332
		1333	static void
806	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1334	api_transfer (SV *prev_sv, SV *next_sv)
807	{	1335	{
808	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1336	dTHX;
		1337	struct transfer_args ta;
		1338
		1339	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1340	TRANSFER (ta);
809	}	1341	}
810		1342
811	/** Coro ********************************************************************/	1343	/** Coro ********************************************************************/
812		1344
813	#define PRIO_MAX 3
814	#define PRIO_HIGH 1
815	#define PRIO_NORMAL 0
816	#define PRIO_LOW -1
817	#define PRIO_IDLE -3
818	#define PRIO_MIN -4
819
820	/* for Coro.pm */
821	static GV *coro_current, *coro_idle;
822	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
823	static int coro_nready;
824
825	static void	1345	static void
826	coro_enq (pTHX_ SV *sv)	1346	coro_enq (pTHX_ SV *coro_sv)
		1347	{
		1348	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1349	}
		1350
		1351	static SV *
		1352	coro_deq (pTHX)
827	{	1353	{
828	int prio;	1354	int prio;
829		1355
830	if (SvTYPE (sv) != SVt_PVHV)
831	croak ("Coro::ready tried to enqueue something that is not a coroutine");
832
833	prio = SvSTATE (sv)->prio;
834
835	av_push (coro_ready [prio - PRIO_MIN], sv);
836	coro_nready++;
837	}
838
839	static SV *
840	coro_deq (pTHX_ int min_prio)
841	{
842	int prio = PRIO_MAX - PRIO_MIN;
843
844	min_prio -= PRIO_MIN;
845	if (min_prio < 0)
846	min_prio = 0;
847
848	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1356	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
849	if (AvFILLp (coro_ready [prio]) >= 0)	1357	if (AvFILLp (coro_ready [prio]) >= 0)
850	{
851	coro_nready--;
852	return av_shift (coro_ready [prio]);	1358	return av_shift (coro_ready [prio]);
853	}
854		1359
855	return 0;	1360	return 0;
856	}	1361	}
857		1362
		1363	static int
		1364	api_ready (SV *coro_sv)
		1365	{
		1366	dTHX;
		1367	struct coro *coro;
		1368
		1369	if (SvROK (coro_sv))
		1370	coro_sv = SvRV (coro_sv);
		1371
		1372	coro = SvSTATE (coro_sv);
		1373
		1374	if (coro->flags & CF_READY)
		1375	return 0;
		1376
		1377	coro->flags |= CF_READY;
		1378
		1379	LOCK;
		1380	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1381	++coro_nready;
		1382	UNLOCK;
		1383
		1384	return 1;
		1385	}
		1386
		1387	static int
		1388	api_is_ready (SV *coro_sv)
		1389	{
		1390	dTHX;
		1391	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1392	}
		1393
858	static void	1394	static void
859	api_ready (SV *coro)	1395	prepare_schedule (pTHX_ struct transfer_args *ta)
860	{	1396	{
861	dTHX;	1397	SV *prev_sv, *next_sv;
862		1398
863	if (SvROK (coro))	1399	for (;;)
864	coro = SvRV (coro);	1400	{
		1401	LOCK;
		1402	next_sv = coro_deq (aTHX);
		1403
		1404	/* nothing to schedule: call the idle handler */
		1405	if (expect_false (!next_sv))
		1406	{
		1407	dSP;
		1408	UNLOCK;
		1409
		1410	ENTER;
		1411	SAVETMPS;
		1412
		1413	PUSHMARK (SP);
		1414	PUTBACK;
		1415	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1416	SPAGAIN;
		1417
		1418	FREETMPS;
		1419	LEAVE;
		1420	continue;
		1421	}
		1422
		1423	ta->next = SvSTATE (next_sv);
		1424
		1425	/* cannot transfer to destroyed coros, skip and look for next */
		1426	if (expect_false (ta->next->flags & CF_DESTROYED))
		1427	{
		1428	UNLOCK;
		1429	SvREFCNT_dec (next_sv);
		1430	/* coro_nready is already taken care of by destroy */
		1431	continue;
		1432	}
		1433
		1434	--coro_nready;
		1435	UNLOCK;
		1436	break;
		1437	}
		1438
		1439	/* free this only after the transfer */
		1440	prev_sv = SvRV (coro_current);
		1441	ta->prev = SvSTATE (prev_sv);
		1442	TRANSFER_CHECK (*ta);
		1443	assert (ta->next->flags & CF_READY);
		1444	ta->next->flags &= ~CF_READY;
		1445	SvRV_set (coro_current, next_sv);
865		1446
866	LOCK;	1447	LOCK;
867	coro_enq (aTHX_ SvREFCNT_inc (coro));	1448	free_coro_mortal (aTHX);
		1449	coro_mortal = prev_sv;
868	UNLOCK;	1450	UNLOCK;
		1451	}
		1452
		1453	static void
		1454	prepare_cede (pTHX_ struct transfer_args *ta)
		1455	{
		1456	api_ready (coro_current);
		1457	prepare_schedule (aTHX_ ta);
		1458	}
		1459
		1460	static int
		1461	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1462	{
		1463	if (coro_nready)
		1464	{
		1465	SV *prev = SvRV (coro_current);
		1466	prepare_schedule (aTHX_ ta);
		1467	api_ready (prev);
		1468	return 1;
		1469	}
		1470	else
		1471	return 0;
869	}	1472	}
870		1473
871	static void	1474	static void
872	api_schedule (void)	1475	api_schedule (void)
873	{	1476	{
874	dTHX;	1477	dTHX;
		1478	struct transfer_args ta;
875		1479
876	SV *prev, *next;	1480	prepare_schedule (aTHX_ &ta);
877	SV *current = GvSV (coro_current);	1481	TRANSFER (ta);
		1482	}
878		1483
879	for (;;)	1484	static int
880	{	1485	api_cede (void)
881	LOCK;	1486	{
		1487	dTHX;
		1488	struct transfer_args ta;
882		1489
883	next = coro_deq (aTHX_ PRIO_MIN);	1490	prepare_cede (aTHX_ &ta);
884		1491
885	if (next)	1492	if (expect_true (ta.prev != ta.next))
886	break;
887
888	UNLOCK;
889
890	{	1493	{
891	dSP;	1494	TRANSFER (ta);
892		1495	return 1;
893	ENTER;
894	SAVETMPS;
895
896	PUSHMARK (SP);
897	PUTBACK;
898	call_sv (GvSV (coro_idle), G_DISCARD);
899
900	FREETMPS;
901	LEAVE;
902	}	1496	}
		1497	else
		1498	return 0;
		1499	}
		1500
		1501	static int
		1502	api_cede_notself (void)
		1503	{
		1504	dTHX;
		1505	struct transfer_args ta;
		1506
		1507	if (prepare_cede_notself (aTHX_ &ta))
903	}	1508	{
904		1509	TRANSFER (ta);
905	prev = SvRV (current);	1510	return 1;
906	SvRV (current) = next;	1511	}
907		1512	else
908	/* free this only after the transfer */	1513	return 0;
909	coro_mortal = prev;
910
911	UNLOCK;
912
913	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
914	}	1514	}
915
916	static int coro_cede_self;
917		1515
918	static void	1516	static void
919	api_cede (void)	1517	api_trace (SV *coro_sv, int flags)
920	{	1518	{
921	dTHX;	1519	dTHX;
922	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1520	struct coro *coro = SvSTATE (coro_sv);
923		1521
924	LOCK;	1522	if (flags & CC_TRACE)
925
926	if (coro_cede_self)
927	{
928	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
929	av_unshift (runqueue, 1);
930	av_store (runqueue, 0, current);
931	coro_nready++;
932	coro_cede_self = 0;
933	}	1523	{
		1524	if (!coro->cctx)
		1525	coro->cctx = cctx_new ();
		1526	else if (!(coro->cctx->flags & CC_TRACE))
		1527	croak ("cannot enable tracing on coroutine with custom stack");
		1528
		1529	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1530	}
		1531	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1532	{
		1533	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1534
		1535	if (coro->flags & CF_RUNNING)
		1536	PL_runops = RUNOPS_DEFAULT;
934	else	1537	else
935	coro_enq (aTHX_ current);	1538	coro->slot->runops = RUNOPS_DEFAULT;
936		1539	}
937	UNLOCK;
938
939	api_schedule ();
940	}	1540	}
941		1541
942	MODULE = Coro::State PACKAGE = Coro::State	1542	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
943		1543
944	PROTOTYPES: DISABLE	1544	PROTOTYPES: DISABLE
945		1545
946	BOOT:	1546	BOOT:
947	{	1547	{
948	#ifdef USE_ITHREADS	1548	#ifdef USE_ITHREADS
949	MUTEX_INIT (&coro_mutex);	1549	MUTEX_INIT (&coro_mutex);
950	#endif	1550	#endif
951	BOOT_PAGESIZE;	1551	BOOT_PAGESIZE;
952		1552
		1553	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1554	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1555
		1556	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1557	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1558	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1559	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1560
		1561	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1562	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1563	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1564
953	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1565	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
954		1566
955	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1567	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
956	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1568	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
957	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1569	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1570	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
958		1571
959	main_mainstack = PL_mainstack;	1572	main_mainstack = PL_mainstack;
		1573	main_top_env = PL_top_env;
		1574
		1575	while (main_top_env->je_prev)
		1576	main_top_env = main_top_env->je_prev;
960		1577
961	coroapi.ver = CORO_API_VERSION;	1578	coroapi.ver = CORO_API_VERSION;
		1579	coroapi.rev = CORO_API_REVISION;
962	coroapi.transfer = api_transfer;	1580	coroapi.transfer = api_transfer;
963
964	Newz (0, main_stack, 1, coro_stack);
965	main_stack->idle_sp = (void *)-1;
966		1581
967	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1582	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
968	}	1583	}
969		1584
970	SV *	1585	SV *
971	new (char *klass, ...)	1586	new (char *klass, ...)
972	CODE:	1587	CODE:
973	{	1588	{
974	struct coro *coro;	1589	struct coro *coro;
		1590	MAGIC *mg;
975	HV *hv;	1591	HV *hv;
976	int i;	1592	int i;
977		1593
978	Newz (0, coro, 1, struct coro);	1594	Newz (0, coro, 1, struct coro);
979	coro->args = newAV ();	1595	coro->args = newAV ();
		1596	coro->flags = CF_NEW;
980		1597
		1598	if (coro_first) coro_first->prev = coro;
		1599	coro->next = coro_first;
		1600	coro_first = coro;
		1601
981	hv = newHV ();	1602	coro->hv = hv = newHV ();
982	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1603	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1604	mg->mg_flags |= MGf_DUP;
983	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1605	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
984		1606
985	av_push (coro->args, newSVsv (RETVAL));	1607	av_extend (coro->args, items - 1);
986	for (i = 1; i < items; i++)	1608	for (i = 1; i < items; i++)
987	av_push (coro->args, newSVsv (ST (i)));	1609	av_push (coro->args, newSVsv (ST (i)));
988
989	coro->stack = main_stack;
990	/*coro->mainstack = 0; *//*actual work is done inside transfer */
991	/*coro->stack = 0;*/
992	}	1610	}
993	OUTPUT:	1611	OUTPUT:
994	RETVAL	1612	RETVAL
995		1613
		1614	# these not obviously related functions are all rolled into the same xs
		1615	# function to increase chances that they all will call transfer with the same
		1616	# stack offset
996	void	1617	void
997	transfer (prev, next, flags)	1618	_set_stacklevel (...)
998	SV *prev	1619	ALIAS:
999	SV *next	1620	Coro::State::transfer = 1
1000	int flags	1621	Coro::schedule = 2
		1622	Coro::cede = 3
		1623	Coro::cede_notself = 4
1001	CODE:	1624	CODE:
		1625	{
		1626	struct transfer_args ta;
		1627
1002	PUTBACK;	1628	PUTBACK;
1003	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1629	switch (ix)
		1630	{
		1631	case 0:
		1632	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1633	ta.next = 0;
		1634	break;
		1635
		1636	case 1:
		1637	if (items != 2)
		1638	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1639
		1640	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1641	break;
		1642
		1643	case 2:
		1644	prepare_schedule (aTHX_ &ta);
		1645	break;
		1646
		1647	case 3:
		1648	prepare_cede (aTHX_ &ta);
		1649	break;
		1650
		1651	case 4:
		1652	if (!prepare_cede_notself (aTHX_ &ta))
		1653	XSRETURN_EMPTY;
		1654
		1655	break;
		1656	}
1004	SPAGAIN;	1657	SPAGAIN;
1005		1658
1006	int	1659	BARRIER;
1007	prio (Coro::State coro, int newprio = 0)	1660	PUTBACK;
1008	ALIAS:	1661	TRANSFER (ta);
1009	nice = 1	1662	SPAGAIN; /* might be the sp of a different coroutine now */
1010	CODE:	1663	/* be extra careful not to ever do anything after TRANSFER */
1011	{
1012	RETVAL = coro->prio;
1013
1014	if (items > 1)
1015	{
1016	if (ix)
1017	newprio += coro->prio;
1018
1019	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1020	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1021
1022	coro->prio = newprio;
1023	}
1024	}	1664	}
1025		1665
1026	void	1666	bool
1027	_clear_idle_sp (Coro::State self)	1667	_destroy (SV *coro_sv)
1028	CODE:	1668	CODE:
1029	self->stack->idle_sp = 0;	1669	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1030		1670	OUTPUT:
1031	void	1671	RETVAL
1032	_clone_state_from (SV *dst, SV *src)
1033	CODE:
1034	{
1035	struct coro *coro_src = SvSTATE (src);
1036
1037	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1038
1039	++coro_src->refcnt;
1040	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1041	}
1042		1672
1043	void	1673	void
1044	_exit (code)	1674	_exit (code)
1045	int code	1675	int code
1046	PROTOTYPE: $	1676	PROTOTYPE: $
1047	CODE:	1677	CODE:
1048	_exit (code);	1678	_exit (code);
1049		1679
1050	MODULE = Coro::State PACKAGE = Coro::Cont	1680	int
		1681	cctx_stacksize (int new_stacksize = 0)
		1682	CODE:
		1683	RETVAL = coro_stacksize;
		1684	if (new_stacksize)
		1685	coro_stacksize = new_stacksize;
		1686	OUTPUT:
		1687	RETVAL
		1688
		1689	int
		1690	cctx_count ()
		1691	CODE:
		1692	RETVAL = cctx_count;
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	int
		1697	cctx_idle ()
		1698	CODE:
		1699	RETVAL = cctx_idle;
		1700	OUTPUT:
		1701	RETVAL
1051		1702
1052	void	1703	void
1053	yield (...)	1704	list ()
1054	PROTOTYPE: @	1705	PPCODE:
		1706	{
		1707	struct coro *coro;
		1708	for (coro = coro_first; coro; coro = coro->next)
		1709	if (coro->hv)
		1710	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1711	}
		1712
		1713	void
		1714	call (Coro::State coro, SV *coderef)
		1715	ALIAS:
		1716	eval = 1
		1717	CODE:
		1718	{
		1719	if (coro->mainstack)
		1720	{
		1721	struct coro temp;
		1722
		1723	if (!(coro->flags & CF_RUNNING))
		1724	{
		1725	PUTBACK;
		1726	save_perl (aTHX_ &temp);
		1727	load_perl (aTHX_ coro);
		1728	}
		1729
		1730	{
		1731	dSP;
		1732	ENTER;
		1733	SAVETMPS;
		1734	PUTBACK;
		1735	PUSHSTACK;
		1736	PUSHMARK (SP);
		1737
		1738	if (ix)
		1739	eval_sv (coderef, 0);
		1740	else
		1741	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1742
		1743	POPSTACK;
		1744	SPAGAIN;
		1745	FREETMPS;
		1746	LEAVE;
		1747	PUTBACK;
		1748	}
		1749
		1750	if (!(coro->flags & CF_RUNNING))
		1751	{
		1752	save_perl (aTHX_ coro);
		1753	load_perl (aTHX_ &temp);
		1754	SPAGAIN;
		1755	}
		1756	}
		1757	}
		1758
		1759	SV *
		1760	is_ready (Coro::State coro)
		1761	PROTOTYPE: $
		1762	ALIAS:
		1763	is_ready = CF_READY
		1764	is_running = CF_RUNNING
		1765	is_new = CF_NEW
		1766	is_destroyed = CF_DESTROYED
		1767	CODE:
		1768	RETVAL = boolSV (coro->flags & ix);
		1769	OUTPUT:
		1770	RETVAL
		1771
		1772	void
		1773	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1774
		1775	SV *
		1776	has_stack (Coro::State coro)
		1777	PROTOTYPE: $
		1778	CODE:
		1779	RETVAL = boolSV (!!coro->cctx);
		1780	OUTPUT:
		1781	RETVAL
		1782
		1783	int
		1784	is_traced (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	IV
		1792	rss (Coro::State coro)
		1793	PROTOTYPE: $
		1794	ALIAS:
		1795	usecount = 1
1055	CODE:	1796	CODE:
1056	{	1797	switch (ix)
1057	SV *yieldstack;	1798	{
1058	SV *sv;	1799	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	AV *defav = GvAV (PL_defgv);	1800	case 1: RETVAL = coro->usecount; break;
1060	struct coro *prev, *next;
1061
1062	yieldstack = *hv_fetch (
1063	(HV *)SvRV (GvSV (coro_current)),
1064	"yieldstack", sizeof ("yieldstack") - 1,
1065	0	1801	}
1066	);	1802	OUTPUT:
		1803	RETVAL
1067		1804
1068	/* set up @_ -- ugly */
1069	av_clear (defav);
1070	av_fill (defav, items - 1);
1071	while (items--)
1072	av_store (defav, items, SvREFCNT_inc (ST(items)));
1073
1074	sv = av_pop ((AV *)SvRV (yieldstack));
1075	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1076	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1077	SvREFCNT_dec (sv);
1078
1079	coro_state_transfer (aTHX_ prev, next, 0);
1080	}
1081		1805
1082	MODULE = Coro::State PACKAGE = Coro	1806	MODULE = Coro::State PACKAGE = Coro
1083		1807
1084	BOOT:	1808	BOOT:
1085	{	1809	{
1086	int i;	1810	int i;
1087		1811
		1812	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1813	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1814	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1815
		1816	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1817	SvREADONLY_on (coro_current);
		1818
1088	coro_stash = gv_stashpv ("Coro", TRUE);	1819	coro_stash = gv_stashpv ("Coro", TRUE);
1089		1820
1090	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1821	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1091	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1822	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1092	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1823	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1093	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1824	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1094	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1825	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1095	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1826	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1096		1827
1097	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1098	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1099
1100	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1828	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1101	coro_ready[i] = newAV ();	1829	coro_ready[i] = newAV ();
1102		1830
1103	{	1831	{
1104	SV *sv = perl_get_sv("Coro::API", 1);	1832	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1833	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1105		1834
1106	coroapi.schedule = api_schedule;	1835	coroapi.schedule = api_schedule;
1107	coroapi.cede = api_cede;	1836	coroapi.cede = api_cede;
		1837	coroapi.cede_notself = api_cede_notself;
1108	coroapi.ready = api_ready;	1838	coroapi.ready = api_ready;
		1839	coroapi.is_ready = api_is_ready;
1109	coroapi.nready = &coro_nready;	1840	coroapi.nready = &coro_nready;
1110	coroapi.current = coro_current;	1841	coroapi.current = coro_current;
1111		1842
1112	GCoroAPI = &coroapi;	1843	GCoroAPI = &coroapi;
1113	sv_setiv (sv, (IV)&coroapi);	1844	sv_setiv (sv, (IV)&coroapi);
1114	SvREADONLY_on (sv);	1845	SvREADONLY_on (sv);
1115	}	1846	}
1116	}	1847	}
1117		1848
1118	void	1849	void
		1850	_set_current (SV *current)
		1851	PROTOTYPE: $
		1852	CODE:
		1853	SvREFCNT_dec (SvRV (coro_current));
		1854	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1855
		1856	int
		1857	prio (Coro::State coro, int newprio = 0)
		1858	ALIAS:
		1859	nice = 1
		1860	CODE:
		1861	{
		1862	RETVAL = coro->prio;
		1863
		1864	if (items > 1)
		1865	{
		1866	if (ix)
		1867	newprio = coro->prio - newprio;
		1868
		1869	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1870	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1871
		1872	coro->prio = newprio;
		1873	}
		1874	}
		1875	OUTPUT:
		1876	RETVAL
		1877
		1878	SV *
1119	ready (SV *self)	1879	ready (SV *self)
1120	PROTOTYPE: $	1880	PROTOTYPE: $
1121	CODE:	1881	CODE:
1122	api_ready (self);	1882	RETVAL = boolSV (api_ready (self));
		1883	OUTPUT:
		1884	RETVAL
1123		1885
1124	int	1886	int
1125	nready (...)	1887	nready (...)
1126	PROTOTYPE:	1888	PROTOTYPE:
1127	CODE:	1889	CODE:
1128	RETVAL = coro_nready;	1890	RETVAL = coro_nready;
1129	OUTPUT:	1891	OUTPUT:
1130	RETVAL	1892	RETVAL
1131		1893
1132	void	1894	void
1133	schedule (...)	1895	throw (Coro::State self, SV *throw = &PL_sv_undef)
1134	PROTOTYPE:	1896	PROTOTYPE: $;$
		1897	CODE:
		1898	SvREFCNT_dec (self->throw);
		1899	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1900
		1901	# for async_pool speedup
		1902	void
		1903	_pool_1 (SV *cb)
1135	CODE:	1904	CODE:
1136	api_schedule ();	1905	{
		1906	struct coro *coro = SvSTATE (coro_current);
		1907	HV *hv = (HV *)SvRV (coro_current);
		1908	AV *defav = GvAV (PL_defgv);
		1909	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1910	AV *invoke_av;
		1911	int i, len;
		1912
		1913	if (!invoke)
		1914	{
		1915	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1916	croak ("\3async_pool terminate\2\n");
		1917	}
		1918
		1919	SvREFCNT_dec (coro->saved_deffh);
		1920	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1921
		1922	hv_store (hv, "desc", sizeof ("desc") - 1,
		1923	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1924
		1925	invoke_av = (AV *)SvRV (invoke);
		1926	len = av_len (invoke_av);
		1927
		1928	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1929
		1930	if (len > 0)
		1931	{
		1932	av_fill (defav, len - 1);
		1933	for (i = 0; i < len; ++i)
		1934	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1935	}
		1936
		1937	SvREFCNT_dec (invoke);
		1938	}
1137		1939
1138	void	1940	void
1139	_set_cede_self ()	1941	_pool_2 (SV *cb)
1140	CODE:	1942	CODE:
1141	coro_cede_self = 1;	1943	{
		1944	struct coro *coro = SvSTATE (coro_current);
1142		1945
1143	void	1946	sv_setsv (cb, &PL_sv_undef);
1144	cede (...)	1947
1145	PROTOTYPE:	1948	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1146	CODE:	1949	coro->saved_deffh = 0;
1147	api_cede ();	1950
		1951	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1952	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1953	{
		1954	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1955	croak ("\3async_pool terminate\2\n");
		1956	}
		1957
		1958	av_clear (GvAV (PL_defgv));
		1959	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1961
		1962	coro->prio = 0;
		1963
		1964	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1965	api_trace (coro_current, 0);
		1966
		1967	av_push (av_async_pool, newSVsv (coro_current));
		1968	}
		1969
1148		1970
1149	MODULE = Coro::State PACKAGE = Coro::AIO	1971	MODULE = Coro::State PACKAGE = Coro::AIO
1150		1972
1151	SV *	1973	SV *
1152	_get_state ()	1974	_get_state ()
1153	CODE:	1975	CODE:
1154	{	1976	{
1155	struct {	1977	struct io_state *data;
1156	int errorno;
1157	int laststype;
1158	int laststatval;
1159	Stat_t statcache;
1160	} data;
1161		1978
		1979	RETVAL = newSV (sizeof (struct io_state));
		1980	data = (struct io_state *)SvPVX (RETVAL);
		1981	SvCUR_set (RETVAL, sizeof (struct io_state));
		1982	SvPOK_only (RETVAL);
		1983
1162	data.errorno = errno;	1984	data->errorno = errno;
1163	data.laststype = PL_laststype;	1985	data->laststype = PL_laststype;
1164	data.laststatval = PL_laststatval;	1986	data->laststatval = PL_laststatval;
1165	data.statcache = PL_statcache;	1987	data->statcache = PL_statcache;
1166
1167	RETVAL = newSVpvn ((char *)&data, sizeof data);
1168	}	1988	}
1169	OUTPUT:	1989	OUTPUT:
1170	RETVAL	1990	RETVAL
1171		1991
1172	void	1992	void
1173	_set_state (char *data_)	1993	_set_state (char *data_)
1174	PROTOTYPE: $	1994	PROTOTYPE: $
1175	CODE:	1995	CODE:
1176	{	1996	{
1177	struct {	1997	struct io_state *data = (void *)data_;
1178	int errorno;
1179	int laststype;
1180	int laststatval;
1181	Stat_t statcache;
1182	} *data = (void *)data_;
1183		1998
1184	errno = data->errorno;	1999	errno = data->errorno;
1185	PL_laststype = data->laststype;	2000	PL_laststype = data->laststype;
1186	PL_laststatval = data->laststatval;	2001	PL_laststatval = data->laststatval;
1187	PL_statcache = data->statcache;	2002	PL_statcache = data->statcache;
1188	}	2003	}
		2004

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