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Comparing Coro/Coro/State.xs (file contents):
Revision 1.65 by root, Mon Dec 5 23:50:48 2005 UTC vs.
Revision 1.202 by root, Mon Oct 8 02:50:23 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef HAVE_MMAP
		17	# include <unistd.h>
		18	# include <sys/mman.h>
		19	# ifndef MAP_ANONYMOUS
		20	# ifdef MAP_ANON
		21	# define MAP_ANONYMOUS MAP_ANON
		22	# else
		23	# undef HAVE_MMAP
		24	# endif
		25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
		33	# endif
		34	#else
		35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
		38
		39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	|| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	56	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	57	# define PL_ppaddr ppaddr
14	# endif	58	# endif
15	# ifndef call_sv	59	# ifndef call_sv
16	# define call_sv perl_call_sv	60	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	71	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	72	# define IS_PADCONST(v) 0
29	# endif	73	# endif
30	#endif	74	#endif
31		75
32	#include <signal.h>	76	/* 5.8.7 */
33		77	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	78	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	79	#endif
44	#endif
45		80
46	#define SUB_INIT "Coro::State::initialize"	81	/* 5.8.8 */
47	#define UCORO_STATE "_coro_state"	82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
48		88
49	/* The next macro should declare a variable stacklevel that contains and approximation	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
50	* to the current C stack pointer. Its property is that it changes with each call	90	# undef CORO_STACKGUARD
51	* and should be unique. */	91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		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. */
		104	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
53		106
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		108
56	#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))
57		123
58	#include "CoroAPI.h"	124	#include "CoroAPI.h"
59		125
60	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	130	#else
65	# define LOCK 0	131	# define LOCK (void)0
66	# define UNLOCK 0	132	# define UNLOCK (void)0
67	#endif	133	#endif
68		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;
69	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
70	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;
71	static HV *coro_state_stash;	150	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	151	static SV *coro_mortal; /* will be freed after next transfer */
75		152
76	/* this is actually not only the c stack but also c registers etc... */	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
		177	/* this is a structure representing a c-level coroutine */
		178	typedef struct coro_cctx {
		179	struct coro_cctx *next;
		180
		181	/* the stack */
		182	void *sptr;
		183	size_t ssize;
		184
		185	/* cpu state */
		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 */
		188	JMPENV *top_env;
		189	coro_context cctx;
		190
		191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
		196
		197	enum {
		198	CF_RUNNING = 0x0001, /* coroutine is running */
		199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
77	typedef struct {	205	typedef struct {
78	int refcnt; /* pointer reference counter */	206	SV *defsv;
79	int usecnt; /* shared by how many coroutines */	207	AV *defav;
80	int gencnt; /* generation counter */	208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
81		214
82	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83		216
84	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
85	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87
88	struct coro {	218	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	219	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	220	coro_cctx *cctx;
91		221
92	/* the optional C context */	222	/* process data */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;	223	AV *mainstack;
110	SV **stack_sp;	224	perl_slots *slot; /* basically the saved sp */
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	COP *curcop;
134	JMPENV *top_env;
135		225
136	/* data associated with this coroutine (initial args) */	226	/* data associated with this coroutine (initial args) */
137	AV *args;	227	AV *args;
		228	int refcnt;
		229	int flags; /* CF_ flags */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV *throw;
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
		243	HV *hv; /* the perl hash associated with this coro, if any */
138	};	244	};
139		245
140	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
142		248
143	/* mostly copied from op.c:cv_clone2 */	249	/** Coro ********************************************************************/
144	STATIC AV *	250
145	clone_padlist (pTHX_ AV *protopadlist)	251	#define PRIO_MAX 3
		252	#define PRIO_HIGH 1
		253	#define PRIO_NORMAL 0
		254	#define PRIO_LOW -1
		255	#define PRIO_IDLE -3
		256	#define PRIO_MIN -4
		257
		258	/* for Coro.pm */
		259	static SV *coro_current;
		260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		261	static int coro_nready;
		262	static struct coro *coro_first;
		263
		264	/** lowlevel stuff **********************************************************/
		265
		266	static SV *
		267	coro_get_sv (const char *name, int create)
146	{	268	{
147	AV *av;	269	#if PERL_VERSION_ATLEAST (5,9,0)
148	I32 ix;	270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	271	get_sv (name, create);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	272	#endif
151	SV **pname = AvARRAY (protopad_name);	273	return get_sv (name, create);
152	SV **ppad = AvARRAY (protopad);	274	}
153	I32 fname = AvFILLp (protopad_name);	275
154	I32 fpad = AvFILLp (protopad);	276	static AV *
		277	coro_get_av (const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,9,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_av (name, create);
		282	#endif
		283	return get_av (name, create);
		284	}
		285
		286	static HV *
		287	coro_get_hv (const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,9,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_hv (name, create);
		292	#endif
		293	return get_hv (name, create);
		294	}
		295
		296	static AV *
		297	coro_clone_padlist (pTHX_ CV *cv)
		298	{
		299	AV *padlist = CvPADLIST (cv);
155	AV *newpadlist, *newpad_name, *newpad;	300	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		301
166	newpadlist = newAV ();	302	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	303	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	304	#if PERL_VERSION_ATLEAST (5,9,0)
		305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		306	#else
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		308	#endif
		309	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		310	--AvFILLp (padlist);
		311
		312	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	313	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		314
240	return newpadlist;	315	return newpadlist;
241	}	316	}
242		317
243	STATIC void	318	static void
244	free_padlist (pTHX_ AV *padlist)	319	free_padlist (pTHX_ AV *padlist)
245	{	320	{
246	/* may be during global destruction */	321	/* may be during global destruction */
247	if (SvREFCNT (padlist))	322	if (SvREFCNT (padlist))
248	{	323	{
…		…
262		337
263	SvREFCNT_dec ((SV*)padlist);	338	SvREFCNT_dec ((SV*)padlist);
264	}	339	}
265	}	340	}
266		341
267	STATIC int	342	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	343	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	344	{
270	AV *padlist;	345	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	346	AV *av = (AV *)mg->mg_obj;
272		347
273	/* casting is fun. */	348	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	349	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	350	free_padlist (aTHX_ padlist);
276		351
277	SvREFCNT_dec (av);	352	SvREFCNT_dec (av);
		353
		354	return 0;
278	}	355	}
279		356
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		358
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		360
		361	#define CORO_MAGIC(cv) \
		362	SvMAGIC (cv) \
		363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		364	? SvMAGIC (cv) \
		365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		366	: 0
		367
		368	static struct coro *
		369	SvSTATE_ (pTHX_ SV *coro)
		370	{
		371	HV *stash;
		372	MAGIC *mg;
		373
		374	if (SvROK (coro))
		375	coro = SvRV (coro);
		376
		377	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		378	croak ("Coro::State object required");
		379
		380	stash = SvSTASH (coro);
		381	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		382	{
		383	/* very slow, but rare, check */
		384	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		385	croak ("Coro::State object required");
		386	}
		387
		388	mg = CORO_MAGIC (coro);
		389	return (struct coro *)mg->mg_ptr;
		390	}
		391
		392	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		393
284	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
285	STATIC void	395	static void
286	get_padlist (pTHX_ CV *cv)	396	get_padlist (pTHX_ CV *cv)
287	{	397	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
289		400
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	else	403	else
		404	{
		405	#if CORO_PREFER_PERL_FUNCTIONS
		406	/* this is probably cleaner, but also slower? */
		407	CV *cp = Perl_cv_clone (cv);
		408	CvPADLIST (cv) = CvPADLIST (cp);
		409	CvPADLIST (cp) = 0;
		410	SvREFCNT_dec (cp);
		411	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		413	#endif
		414	}
294	}	415	}
295		416
296	STATIC void	417	static void
297	put_padlist (pTHX_ CV *cv)	418	put_padlist (pTHX_ CV *cv)
298	{	419	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	420	MAGIC *mg = CORO_MAGIC (cv);
		421	AV *av;
300		422
301	if (!mg)	423	if (expect_false (!mg))
302	{	424	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
307	}	429	}
308		430
309	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	431	av = (AV *)mg->mg_obj;
310	}
311		432
312	#define SB do {	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
313	#define SE } while (0)	434	av_extend (av, AvMAX (av) + 1);
314		435
315	#define LOAD(state) load_state(aTHX_ (state));	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	437	}
317		438
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	439	/** load & save, init *******************************************************/
319		440
320	static void	441	static void
321	load_state(pTHX_ Coro__State c)	442	load_perl (pTHX_ Coro__State c)
322	{	443	{
323	PL_dowarn = c->dowarn;	444	perl_slots *slot = c->slot;
324	PL_in_eval = c->in_eval;	445	c->slot = 0;
325		446
326	PL_curstackinfo = c->curstackinfo;
327	PL_curstack = c->curstack;
328	PL_mainstack = c->mainstack;	447	PL_mainstack = c->mainstack;
329	PL_stack_sp = c->stack_sp;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		448
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	449	GvSV (PL_defgv) = slot->defsv;
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	450	GvAV (PL_defgv) = slot->defav;
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	451	GvSV (PL_errgv) = slot->errsv;
		452	GvSV (irsgv) = slot->irsgv;
		453
		454	#define VAR(name,type) PL_ ## name = slot->name;
		455	# include "state.h"
		456	#undef VAR
		457
		458	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
		459	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
358		460
359	{	461	{
360	dSP;	462	dSP;
		463
361	CV *cv;	464	CV *cv;
362		465
363	/* now do the ugly restore mess */	466	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	467	while (expect_true (cv = (CV *)POPs))
365	{	468	{
366	AV *padlist = (AV *)POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	469	put_padlist (aTHX_ cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	470	CvDEPTH (cv) = PTR2IV (POPs);
372	}	471	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	472	}
376		473
377	PUTBACK;	474	PUTBACK;
378	}	475	}
379	}	476	}
380		477
381	static void	478	static void
382	save_state(pTHX_ Coro__State c, int flags)	479	save_perl (pTHX_ Coro__State c)
383	{	480	{
384	{	481	{
385	dSP;	482	dSP;
386	I32 cxix = cxstack_ix;	483	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	484	PERL_CONTEXT *ccstk = cxstack;
…		…
390	/*	487	/*
391	* the worst thing you can imagine happens first - we have to save	488	* the worst thing you can imagine happens first - we have to save
392	* (and reinitialize) all cv's in the whole callchain :(	489	* (and reinitialize) all cv's in the whole callchain :(
393	*/	490	*/
394		491
395	PUSHs (Nullsv);	492	XPUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	493	/* this loop was inspired by pp_caller */
397	for (;;)	494	for (;;)
398	{	495	{
399	while (cxix >= 0)	496	while (expect_true (cxix >= 0))
400	{	497	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	498	PERL_CONTEXT *cx = &ccstk[cxix--];
402		499
403	if (CxTYPE(cx) == CXt_SUB)	500	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
404	{	501	{
405	CV *cv = cx->blk_sub.cv;	502	CV *cv = cx->blk_sub.cv;
		503
406	if (CvDEPTH(cv))	504	if (expect_true (CvDEPTH (cv)))
407	{	505	{
408	EXTEND (SP, CvDEPTH(cv)*2);	506	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	507	PUSHs ((SV *)CvPADLIST (cv));
		508	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	509	PUSHs ((SV *)cv);
419		510
		511	CvDEPTH (cv) = 0;
420	get_padlist (aTHX_ cv); /* this is a monster */	512	get_padlist (aTHX_ cv);
421	}	513	}
422	}	514	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	515	}
432		516
433	if (top_si->si_type == PERLSI_MAIN)	517	if (expect_true (top_si->si_type == PERLSI_MAIN))
434	break;	518	break;
435		519
436	top_si = top_si->si_prev;	520	top_si = top_si->si_prev;
437	ccstk = top_si->si_cxstack;	521	ccstk = top_si->si_cxstack;
438	cxix = top_si->si_cxix;	522	cxix = top_si->si_cxix;
439	}	523	}
440		524
441	PUTBACK;	525	PUTBACK;
442	}	526	}
443		527
444	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	528	/* allocate some space on the context stack for our purposes */
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	529	/* we manually unroll here, as usually 2 slots is enough */
446	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	530	if (SLOT_COUNT >= 1) CXINC;
		531	if (SLOT_COUNT >= 2) CXINC;
		532	if (SLOT_COUNT >= 3) CXINC;
		533	{
		534	int i;
		535	for (i = 3; i < SLOT_COUNT; ++i)
		536	CXINC;
		537	}
		538	cxstack_ix -= SLOT_COUNT; /* undo allocation */
447		539
448	c->dowarn = PL_dowarn;
449	c->in_eval = PL_in_eval;
450
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;	540	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;	541
455	c->op = PL_op;	542	{
456	c->curpad = PL_curpad;	543	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
457	c->comppad = PL_comppad;	544
458	c->compcv = PL_compcv;	545	slot->defav = GvAV (PL_defgv);
459	c->stack_base = PL_stack_base;	546	slot->defsv = DEFSV;
460	c->stack_max = PL_stack_max;	547	slot->errsv = ERRSV;
461	c->tmps_stack = PL_tmps_stack;	548	slot->irsgv = GvSV (irsgv);
462	c->tmps_floor = PL_tmps_floor;	549
463	c->tmps_ix = PL_tmps_ix;	550	#define VAR(name,type) slot->name = PL_ ## name;
464	c->tmps_max = PL_tmps_max;	551	# include "state.h"
465	c->markstack = PL_markstack;	552	#undef VAR
466	c->markstack_ptr = PL_markstack_ptr;	553	}
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	554	}
480		555
481	/*	556	/*
482	* allocate various perl stacks. This is an exact copy	557	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	558	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	559	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	560	* not usually need a lot of stackspace.
486	*/	561	*/
487	STATIC void	562	#if 1
		563	# define coro_init_stacks init_stacks
		564	#else
		565	static void
488	coro_init_stacks (pTHX)	566	coro_init_stacks (pTHX)
489	{	567	{
490	LOCK;	568	PL_curstackinfo = new_stackinfo(32, 8);
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	569	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	570	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	571	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		572
497	PL_stack_base = AvARRAY(PL_curstack);	573	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	574	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	575	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		576
501	New(50,PL_tmps_stack,96,SV*);	577	New(50,PL_tmps_stack,32,SV*);
502	PL_tmps_floor = -1;	578	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	579	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	580	PL_tmps_max = 32;
505		581
506	New(54,PL_markstack,16,I32);	582	New(54,PL_markstack,16,I32);
507	PL_markstack_ptr = PL_markstack;	583	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	584	PL_markstack_max = PL_markstack + 16;
509		585
510	#ifdef SET_MARK_OFFSET	586	#ifdef SET_MARK_OFFSET
511	SET_MARK_OFFSET;	587	SET_MARK_OFFSET;
512	#endif	588	#endif
513		589
514	New(54,PL_scopestack,16,I32);	590	New(54,PL_scopestack,8,I32);
515	PL_scopestack_ix = 0;	591	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	592	PL_scopestack_max = 8;
517		593
518	New(54,PL_savestack,96,ANY);	594	New(54,PL_savestack,24,ANY);
519	PL_savestack_ix = 0;	595	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	596	PL_savestack_max = 24;
521		597
		598	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	599	New(54,PL_retstack,4,OP*);
523	PL_retstack_ix = 0;	600	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	601	PL_retstack_max = 4;
525		602	#endif
526	UNLOCK;
527	}	603	}
		604	#endif
528		605
529	/*	606	/*
530	* destroy the stacks, the callchain etc...	607	* destroy the stacks, the callchain etc...
531	*/	608	*/
532	STATIC void	609	static void
533	destroy_stacks(pTHX)	610	coro_destroy_stacks (pTHX)
534	{	611	{
535	if (!IN_DESTRUCT)
536	{
537	/* is this ugly, I ask? */
538	LEAVE_SCOPE (0);
539
540	/* sure it is, but more important: is it correct?? :/ */
541	FREETMPS;
542
543	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
544	}
545
546	while (PL_curstackinfo->si_next)	612	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	613	PL_curstackinfo = PL_curstackinfo->si_next;
548		614
549	while (PL_curstackinfo)	615	while (PL_curstackinfo)
550	{	616	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	617	PERL_SI *p = PL_curstackinfo->si_prev;
552		618
553	{ /*D*//*remove*/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	619	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/*D*//*remove*/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	620	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		621
565	Safefree (PL_curstackinfo->si_cxstack);	622	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	623	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	624	PL_curstackinfo = p;
568	}	625	}
569		626
570	Safefree (PL_tmps_stack);	627	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	628	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	629	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	630	Safefree (PL_savestack);
		631	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	632	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	633	#endif
		634	}
		635
		636	static size_t
		637	coro_rss (pTHX_ struct coro *coro)
		638	{
		639	size_t rss = sizeof (*coro);
		640
		641	if (coro->mainstack)
		642	{
		643	perl_slots tmp_slot;
		644	perl_slots *slot;
		645
		646	if (coro->flags & CF_RUNNING)
595	{	647	{
596	/*FIXME*//*D*//* reasonable stack size! */	648	slot = &tmp_slot;
597	stack->ssize = - (8192 * sizeof (long));	649
598	New (0, stack->sptr, 8192, long);	650	#define VAR(name,type) slot->name = PL_ ## name;
		651	# include "state.h"
		652	#undef VAR
599	}	653	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}
606
607	static void
608	deallocate_stack (Coro__State ctx)
609	{
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else	654	else
622	#endif	655	slot = coro->slot;
623	Safefree (stack->sptr);
624		656
625	Safefree (stack);	657	rss += sizeof (slot->curstackinfo);
626	}	658	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
627	else if (ctx->gencnt == stack->gencnt)	659	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
628	--stack->usecnt;	660	rss += slot->tmps_max * sizeof (SV *);
629	}	661	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
630	}	662	rss += slot->scopestack_max * sizeof (I32);
		663	rss += slot->savestack_max * sizeof (ANY);
631		664
		665	#if !PERL_VERSION_ATLEAST (5,9,0)
		666	rss += slot->retstack_max * sizeof (OP *);
		667	#endif
		668	}
		669
		670	return rss;
		671	}
		672
		673	/** coroutine stack handling ************************************************/
		674
632	static void	675	static void
633	setup_coro (void *arg)	676	coro_setup (pTHX_ struct coro *coro)
634	{	677	{
635	/*	678	/*
636	* emulate part of the perl startup here.	679	* emulate part of the perl startup here.
637	*/	680	*/
		681	coro_init_stacks (aTHX);
		682
		683	PL_runops = RUNOPS_DEFAULT;
		684	PL_curcop = &PL_compiling;
		685	PL_in_eval = EVAL_NULL;
		686	PL_comppad = 0;
		687	PL_curpm = 0;
		688	PL_curpad = 0;
		689	PL_localizing = 0;
		690	PL_dirty = 0;
		691	PL_restartop = 0;
		692	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		693	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		694
		695	GvSV (PL_defgv) = newSV (0);
		696	GvAV (PL_defgv) = coro->args; coro->args = 0;
		697	GvSV (PL_errgv) = newSV (0);
		698	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		699	PL_rs = newSVsv (GvSV (irsgv));
		700	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		701
		702	{
		703	dSP;
		704	LOGOP myop;
		705
		706	Zero (&myop, 1, LOGOP);
		707	myop.op_next = Nullop;
		708	myop.op_flags = OPf_WANT_VOID;
		709
		710	PUSHMARK (SP);
		711	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		712	PUTBACK;
		713	PL_op = (OP *)&myop;
		714	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		715	SPAGAIN;
		716	}
		717
		718	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		719	}
		720
		721	static void
		722	coro_destroy (pTHX_ struct coro *coro)
		723	{
		724	if (!IN_DESTRUCT)
		725	{
		726	/* restore all saved variables and stuff */
		727	LEAVE_SCOPE (0);
		728	assert (PL_tmps_floor == -1);
		729
		730	/* free all temporaries */
		731	FREETMPS;
		732	assert (PL_tmps_ix == -1);
		733
		734	/* unwind all extra stacks */
		735	POPSTACK_TO (PL_mainstack);
		736
		737	/* unwind main stack */
		738	dounwind (-1);
		739	}
		740
		741	SvREFCNT_dec (GvSV (PL_defgv));
		742	SvREFCNT_dec (GvAV (PL_defgv));
		743	SvREFCNT_dec (GvSV (PL_errgv));
		744	SvREFCNT_dec (PL_defoutgv);
		745	SvREFCNT_dec (PL_rs);
		746	SvREFCNT_dec (GvSV (irsgv));
		747
		748	SvREFCNT_dec (PL_diehook);
		749	SvREFCNT_dec (PL_warnhook);
		750
		751	SvREFCNT_dec (coro->saved_deffh);
		752	SvREFCNT_dec (coro->throw);
		753
		754	coro_destroy_stacks (aTHX);
		755	}
		756
		757	static void
		758	free_coro_mortal (pTHX)
		759	{
		760	if (expect_true (coro_mortal))
		761	{
		762	SvREFCNT_dec (coro_mortal);
		763	coro_mortal = 0;
		764	}
		765	}
		766
		767	static int
		768	runops_trace (pTHX)
		769	{
		770	COP *oldcop = 0;
		771	int oldcxix = -2;
		772	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		773	coro_cctx *cctx = coro->cctx;
		774
		775	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		776	{
		777	PERL_ASYNC_CHECK ();
		778
		779	if (cctx->flags & CC_TRACE_ALL)
		780	{
		781	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		782	{
		783	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		784	SV **bot, **top;
		785	AV *av = newAV (); /* return values */
		786	SV **cb;
		787	dSP;
		788
		789	GV *gv = CvGV (cx->blk_sub.cv);
		790	SV *fullname = sv_2mortal (newSV (0));
		791	if (isGV (gv))
		792	gv_efullname3 (fullname, gv, 0);
		793
		794	bot = PL_stack_base + cx->blk_oldsp + 1;
		795	top = cx->blk_gimme == G_ARRAY ? SP + 1
		796	: cx->blk_gimme == G_SCALAR ? bot + 1
		797	: bot;
		798
		799	av_extend (av, top - bot);
		800	while (bot < top)
		801	av_push (av, SvREFCNT_inc (*bot++));
		802
		803	PL_runops = RUNOPS_DEFAULT;
		804	ENTER;
		805	SAVETMPS;
		806	EXTEND (SP, 3);
		807	PUSHMARK (SP);
		808	PUSHs (&PL_sv_no);
		809	PUSHs (fullname);
		810	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		811	PUTBACK;
		812	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		813	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		814	SPAGAIN;
		815	FREETMPS;
		816	LEAVE;
		817	PL_runops = runops_trace;
		818	}
		819
		820	if (oldcop != PL_curcop)
		821	{
		822	oldcop = PL_curcop;
		823
		824	if (PL_curcop != &PL_compiling)
		825	{
		826	SV **cb;
		827
		828	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		829	{
		830	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		831
		832	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		833	{
		834	runops_proc_t old_runops = PL_runops;
		835	dSP;
		836	GV *gv = CvGV (cx->blk_sub.cv);
		837	SV *fullname = sv_2mortal (newSV (0));
		838
		839	if (isGV (gv))
		840	gv_efullname3 (fullname, gv, 0);
		841
		842	PL_runops = RUNOPS_DEFAULT;
		843	ENTER;
		844	SAVETMPS;
		845	EXTEND (SP, 3);
		846	PUSHMARK (SP);
		847	PUSHs (&PL_sv_yes);
		848	PUSHs (fullname);
		849	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		850	PUTBACK;
		851	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		852	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		853	SPAGAIN;
		854	FREETMPS;
		855	LEAVE;
		856	PL_runops = runops_trace;
		857	}
		858
		859	oldcxix = cxstack_ix;
		860	}
		861
		862	if (cctx->flags & CC_TRACE_LINE)
		863	{
		864	dSP;
		865
		866	PL_runops = RUNOPS_DEFAULT;
		867	ENTER;
		868	SAVETMPS;
		869	EXTEND (SP, 3);
		870	PL_runops = RUNOPS_DEFAULT;
		871	PUSHMARK (SP);
		872	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		873	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		874	PUTBACK;
		875	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		876	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		877	SPAGAIN;
		878	FREETMPS;
		879	LEAVE;
		880	PL_runops = runops_trace;
		881	}
		882	}
		883	}
		884	}
		885	}
		886
		887	TAINT_NOT;
		888	return 0;
		889	}
		890
		891	/* inject a fake call to Coro::State::_cctx_init into the execution */
		892	/* _cctx_init should be careful, as it could be called at almost any time */
		893	/* during execution of a perl program */
		894	static void NOINLINE
		895	cctx_prepare (pTHX_ coro_cctx *cctx)
		896	{
		897	dSP;
		898	LOGOP myop;
		899
		900	PL_top_env = &PL_start_env;
		901
		902	if (cctx->flags & CC_TRACE)
		903	PL_runops = runops_trace;
		904
		905	Zero (&myop, 1, LOGOP);
		906	myop.op_next = PL_op;
		907	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		908
		909	PUSHMARK (SP);
		910	EXTEND (SP, 2);
		911	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		912	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		913	PUTBACK;
		914	PL_op = (OP *)&myop;
		915	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		916	SPAGAIN;
		917	}
		918
		919	/*
		920	* this is a _very_ stripped down perl interpreter ;)
		921	*/
		922	static void
		923	cctx_run (void *arg)
		924	{
638	dTHX;	925	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		926
643	coro_init_stacks (aTHX);	927	/* cctx_run is the alternative tail of transfer(), so unlock here. */
644	/*PL_curcop = 0;*/	928	UNLOCK;
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */
646	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648		929
649	SPAGAIN;	930	/* we now skip the entersub that lead to transfer() */
		931	PL_op = PL_op->op_next;
650		932
651	if (ctx->stack)	933	/* inject a fake subroutine call to cctx_init */
652	{	934	cctx_prepare (aTHX_ (coro_cctx *)arg);
653	ctx->cursp = 0;
654		935
655	PUSHMARK(SP);	936	/* somebody or something will hit me for both perl_run and PL_restartop */
656	PUTBACK;	937	PL_restartop = PL_op;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	938	perl_run (PL_curinterp);
658		939
659	if (SvTRUE (ERRSV))	940	/*
660	croak (NULL);	941	* If perl-run returns we assume exit() was being called or the coro
661	else	942	* fell off the end, which seems to be the only valid (non-bug)
662	croak ("FATAL: CCTXT coroutine returned!");	943	* reason for perl_run to return. We try to exit by jumping to the
		944	* bootstrap-time "top" top_env, as we cannot restore the "main"
		945	* coroutine as Coro has no such concept
		946	*/
		947	PL_top_env = main_top_env;
		948	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		949	}
		950
		951	static coro_cctx *
		952	cctx_new ()
		953	{
		954	coro_cctx *cctx;
		955	void *stack_start;
		956	size_t stack_size;
		957
		958	++cctx_count;
		959
		960	Newz (0, cctx, 1, coro_cctx);
		961
		962	#if HAVE_MMAP
		963	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		964	/* mmap supposedly does allocate-on-write for us */
		965	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		966
		967	if (cctx->sptr != (void *)-1)
		968	{
		969	# if CORO_STACKGUARD
		970	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		971	# endif
		972	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		973	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		974	cctx->flags |= CC_MAPPED;
663	}	975	}
664	else	976	else
665	{	977	#endif
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}	978	{
689	}	979	cctx->ssize = coro_stacksize * (long)sizeof (long);
		980	New (0, cctx->sptr, coro_stacksize, long);
690		981
691	static void	982	if (!cctx->sptr)
692	continue_coro (void *arg)	983	{
693	{	984	perror ("FATAL: unable to allocate stack for coroutine");
694	/*	985	_exit (EXIT_FAILURE);
695	* this is a _very_ stripped down perl interpreter ;)	986	}
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700		987
701	PL_top_env = &ctx->start_env;	988	stack_start = cctx->sptr;
		989	stack_size = cctx->ssize;
		990	}
702		991
703	ctx->cursp = 0;	992	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
704	PL_op = PL_op->op_next;	993	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
705	CALLRUNOPS(aTHX);
706		994
707	abort ();	995	return cctx;
708	}	996	}
709		997
710	STATIC void	998	static void
		999	cctx_destroy (coro_cctx *cctx)
		1000	{
		1001	if (!cctx)
		1002	return;
		1003
		1004	--cctx_count;
		1005
		1006	#if CORO_USE_VALGRIND
		1007	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1008	#endif
		1009
		1010	#if HAVE_MMAP
		1011	if (cctx->flags & CC_MAPPED)
		1012	munmap (cctx->sptr, cctx->ssize);
		1013	else
		1014	#endif
		1015	Safefree (cctx->sptr);
		1016
		1017	Safefree (cctx);
		1018	}
		1019
		1020	/* wether this cctx should be destructed */
		1021	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1022
		1023	static coro_cctx *
		1024	cctx_get (pTHX)
		1025	{
		1026	while (expect_true (cctx_first))
		1027	{
		1028	coro_cctx *cctx = cctx_first;
		1029	cctx_first = cctx->next;
		1030	--cctx_idle;
		1031
		1032	if (expect_true (!CCTX_EXPIRED (cctx)))
		1033	return cctx;
		1034
		1035	cctx_destroy (cctx);
		1036	}
		1037
		1038	return cctx_new ();
		1039	}
		1040
		1041	static void
		1042	cctx_put (coro_cctx *cctx)
		1043	{
		1044	/* free another cctx if overlimit */
		1045	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1046	{
		1047	coro_cctx *first = cctx_first;
		1048	cctx_first = first->next;
		1049	--cctx_idle;
		1050
		1051	cctx_destroy (first);
		1052	}
		1053
		1054	++cctx_idle;
		1055	cctx->next = cctx_first;
		1056	cctx_first = cctx;
		1057	}
		1058
		1059	/** coroutine switching *****************************************************/
		1060
		1061	static void
		1062	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1063	{
		1064	if (expect_true (prev != next))
		1065	{
		1066	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1067	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1068
		1069	if (expect_false (next->flags & CF_RUNNING))
		1070	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1071
		1072	if (expect_false (next->flags & CF_DESTROYED))
		1073	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1074
		1075	if (
		1076	#if PERL_VERSION_ATLEAST (5,9,0)
		1077	expect_false (PL_parser)
		1078	#else
		1079	expect_false (PL_lex_state != LEX_NOTPARSING)
		1080	#endif
		1081	)
		1082	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1083	}
		1084	}
		1085
		1086	/* always use the TRANSFER macro */
		1087	static void NOINLINE
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	1088	transfer (pTHX_ struct coro *prev, struct coro *next)
712	{	1089	{
713	dSTACKLEVEL;	1090	dSTACKLEVEL;
714		1091
715	if (prev != next)	1092	/* sometimes transfer is only called to set idle_sp */
		1093	if (expect_false (!next))
		1094	{
		1095	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1096	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
716	{	1097	}
717	if (next->mainstack)	1098	else if (expect_true (prev != next))
		1099	{
		1100	coro_cctx *prev__cctx;
		1101
		1102	if (expect_false (prev->flags & CF_NEW))
718	{	1103	{
719	LOCK;	1104	/* create a new empty context */
720	SAVE (prev, flags);	1105	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	1106	prev->flags &= ~CF_NEW;
722	UNLOCK;	1107	prev->flags |= CF_RUNNING;
723
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}	1108	}
757	else if (next->tmps_ix == -2)	1109
758	croak ("tried to transfer to running coroutine");	1110	prev->flags &= ~CF_RUNNING;
		1111	next->flags |= CF_RUNNING;
		1112
		1113	LOCK;
		1114
		1115	if (expect_false (next->flags & CF_NEW))
		1116	{
		1117	/* need to start coroutine */
		1118	next->flags &= ~CF_NEW;
		1119	/* first get rid of the old state */
		1120	save_perl (aTHX_ prev);
		1121	/* setup coroutine call */
		1122	coro_setup (aTHX_ next);
		1123	}
759	else	1124	else
760	{	1125	{
761	LOCK;	1126	/* coroutine already started */
762	SAVE (prev, -1); /* first get rid of the old state */	1127	save_perl (aTHX_ prev);
		1128	load_perl (aTHX_ next);
		1129	}
		1130
		1131	prev__cctx = prev->cctx;
		1132
		1133	/* possibly "free" the cctx */
		1134	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1135	{
		1136	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1137	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1138
		1139	prev->cctx = 0;
		1140
		1141	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1142	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1143	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1144	if (!next->cctx)
		1145	next->cctx = cctx_get (aTHX);
		1146
		1147	cctx_put (prev__cctx);
		1148	}
		1149
		1150	++next->usecount;
		1151
		1152	if (expect_true (!next->cctx))
		1153	next->cctx = cctx_get (aTHX);
		1154
		1155	if (expect_false (prev__cctx != next->cctx))
		1156	{
		1157	prev__cctx->top_env = PL_top_env;
		1158	PL_top_env = next->cctx->top_env;
		1159	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1160	}
		1161
		1162	free_coro_mortal (aTHX);
763	UNLOCK;	1163	UNLOCK;
764		1164
765	if (flags & TRANSFER_SAVE_CCTXT)	1165	if (expect_false (prev->throw || next->throw))
		1166	{
		1167	struct coro *coro = SvSTATE (coro_current);
		1168
		1169	if (coro->throw)
766	{	1170	{
767	if (!prev->stack)	1171	SV *exception = coro->throw;
768	allocate_stack (prev, 0);	1172	coro->throw = 0;
769		1173	sv_setsv (ERRSV, exception);
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);	1174	croak (0);
797	next->cursp = stacklevel;
798	}	1175	}
799	}	1176	}
800	}	1177	}
		1178	}
801		1179
802	LOCK;	1180	struct transfer_args
803	if (coro_mortal)	1181	{
804	{	1182	struct coro *prev, *next;
805	SvREFCNT_dec (coro_mortal);	1183	};
806	coro_mortal = 0;	1184
		1185	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1186	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1187
		1188	/** high level stuff ********************************************************/
		1189
		1190	static int
		1191	coro_state_destroy (pTHX_ struct coro *coro)
		1192	{
		1193	if (coro->flags & CF_DESTROYED)
		1194	return 0;
		1195
		1196	coro->flags |= CF_DESTROYED;
		1197
		1198	if (coro->flags & CF_READY)
807	}	1199	{
		1200	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1201	/* alternative: look through all ready queues and remove the coro */
		1202	LOCK;
		1203	--coro_nready;
808	UNLOCK;	1204	UNLOCK;
809	}	1205	}
		1206	else
		1207	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
810		1208
811	#define SV_CORO(sv,func) \	1209	if (coro->mainstack && coro->mainstack != main_mainstack)
812	do { \	1210	{
813	if (SvROK (sv)) \	1211	struct coro temp;
814	sv = SvRV (sv); \
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		1212
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1213	if (coro->flags & CF_RUNNING)
		1214	croak ("FATAL: tried to destroy currently running coroutine");
833		1215
		1216	save_perl (aTHX_ &temp);
		1217	load_perl (aTHX_ coro);
		1218
		1219	coro_destroy (aTHX_ coro);
		1220
		1221	load_perl (aTHX_ &temp);
		1222
		1223	coro->slot = 0;
		1224	}
		1225
		1226	cctx_destroy (coro->cctx);
		1227	SvREFCNT_dec (coro->args);
		1228
		1229	if (coro->next) coro->next->prev = coro->prev;
		1230	if (coro->prev) coro->prev->next = coro->next;
		1231	if (coro == coro_first) coro_first = coro->next;
		1232
		1233	return 1;
		1234	}
		1235
834	static void	1236	static int
		1237	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1238	{
		1239	struct coro *coro = (struct coro *)mg->mg_ptr;
		1240	mg->mg_ptr = 0;
		1241
		1242	coro->hv = 0;
		1243
		1244	if (--coro->refcnt < 0)
		1245	{
		1246	coro_state_destroy (aTHX_ coro);
		1247	Safefree (coro);
		1248	}
		1249
		1250	return 0;
		1251	}
		1252
		1253	static int
		1254	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1255	{
		1256	struct coro *coro = (struct coro *)mg->mg_ptr;
		1257
		1258	++coro->refcnt;
		1259
		1260	return 0;
		1261	}
		1262
		1263	static MGVTBL coro_state_vtbl = {
		1264	0, 0, 0, 0,
		1265	coro_state_free,
		1266	0,
		1267	#ifdef MGf_DUP
		1268	coro_state_dup,
		1269	#else
		1270	# define MGf_DUP 0
		1271	#endif
		1272	};
		1273
		1274	static void
		1275	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1276	{
		1277	ta->prev = SvSTATE (prev_sv);
		1278	ta->next = SvSTATE (next_sv);
		1279	TRANSFER_CHECK (*ta);
		1280	}
		1281
		1282	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1283	api_transfer (SV *prev_sv, SV *next_sv)
836	{	1284	{
837	SV_CORO (prev, "Coro::transfer");	1285	dTHX;
838	SV_CORO (next, "Coro::transfer");	1286	struct transfer_args ta;
839		1287
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1288	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1289	TRANSFER (ta);
841	}	1290	}
842		1291
843	/** Coro ********************************************************************/	1292	/** Coro ********************************************************************/
844		1293
845	#define PRIO_MAX 3
846	#define PRIO_HIGH 1
847	#define PRIO_NORMAL 0
848	#define PRIO_LOW -1
849	#define PRIO_IDLE -3
850	#define PRIO_MIN -4
851
852	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;
856
857	static void	1294	static void
858	coro_enq (pTHX_ SV *sv)	1295	coro_enq (pTHX_ SV *coro_sv)
859	{	1296	{
860	if (SvTYPE (sv) == SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);	1297	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}	1298	}
877		1299
878	static SV *	1300	static SV *
879	coro_deq (pTHX_ int min_prio)	1301	coro_deq (pTHX_ int min_prio)
880	{	1302	{
…		…
883	min_prio -= PRIO_MIN;	1305	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1306	if (min_prio < 0)
885	min_prio = 0;	1307	min_prio = 0;
886		1308
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1309	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	1310	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready[prio]);	1311	return av_shift (coro_ready [prio]);
892	}
893		1312
894	return 0;	1313	return 0;
895	}	1314	}
896		1315
897	static void	1316	static int
898	api_ready (SV *coro)	1317	api_ready (SV *coro_sv)
899	{	1318	{
900	dTHX;	1319	dTHX;
		1320	struct coro *coro;
901		1321
902	if (SvROK (coro))	1322	if (SvROK (coro_sv))
903	coro = SvRV (coro);	1323	coro_sv = SvRV (coro_sv);
		1324
		1325	coro = SvSTATE (coro_sv);
		1326
		1327	if (coro->flags & CF_READY)
		1328	return 0;
		1329
		1330	coro->flags |= CF_READY;
904		1331
905	LOCK;	1332	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	1333	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1334	++coro_nready;
907	UNLOCK;	1335	UNLOCK;
		1336
		1337	return 1;
		1338	}
		1339
		1340	static int
		1341	api_is_ready (SV *coro_sv)
		1342	{
		1343	dTHX;
		1344	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1345	}
		1346
		1347	static void
		1348	prepare_schedule (pTHX_ struct transfer_args *ta)
		1349	{
		1350	SV *prev_sv, *next_sv;
		1351
		1352	for (;;)
		1353	{
		1354	LOCK;
		1355	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1356
		1357	/* nothing to schedule: call the idle handler */
		1358	if (expect_false (!next_sv))
		1359	{
		1360	dSP;
		1361	UNLOCK;
		1362
		1363	ENTER;
		1364	SAVETMPS;
		1365
		1366	PUSHMARK (SP);
		1367	PUTBACK;
		1368	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1369
		1370	FREETMPS;
		1371	LEAVE;
		1372	continue;
		1373	}
		1374
		1375	ta->next = SvSTATE (next_sv);
		1376
		1377	/* cannot transfer to destroyed coros, skip and look for next */
		1378	if (expect_false (ta->next->flags & CF_DESTROYED))
		1379	{
		1380	UNLOCK;
		1381	SvREFCNT_dec (next_sv);
		1382	/* coro_nready is already taken care of by destroy */
		1383	continue;
		1384	}
		1385
		1386	--coro_nready;
		1387	UNLOCK;
		1388	break;
		1389	}
		1390
		1391	/* free this only after the transfer */
		1392	prev_sv = SvRV (coro_current);
		1393	ta->prev = SvSTATE (prev_sv);
		1394	TRANSFER_CHECK (*ta);
		1395	assert (ta->next->flags & CF_READY);
		1396	ta->next->flags &= ~CF_READY;
		1397	SvRV_set (coro_current, next_sv);
		1398
		1399	LOCK;
		1400	free_coro_mortal (aTHX);
		1401	coro_mortal = prev_sv;
		1402	UNLOCK;
		1403	}
		1404
		1405	static void
		1406	prepare_cede (pTHX_ struct transfer_args *ta)
		1407	{
		1408	api_ready (coro_current);
		1409	prepare_schedule (aTHX_ ta);
		1410	}
		1411
		1412	static int
		1413	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1414	{
		1415	if (coro_nready)
		1416	{
		1417	SV *prev = SvRV (coro_current);
		1418	prepare_schedule (aTHX_ ta);
		1419	api_ready (prev);
		1420	return 1;
		1421	}
		1422	else
		1423	return 0;
908	}	1424	}
909		1425
910	static void	1426	static void
911	api_schedule (void)	1427	api_schedule (void)
912	{	1428	{
913	dTHX;	1429	dTHX;
		1430	struct transfer_args ta;
914		1431
915	SV *prev, *next;	1432	prepare_schedule (aTHX_ &ta);
916		1433	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1434	}
938		1435
939	static void	1436	static int
940	api_cede (void)	1437	api_cede (void)
941	{	1438	{
942	dTHX;	1439	dTHX;
		1440	struct transfer_args ta;
943		1441
944	LOCK;	1442	prepare_cede (aTHX_ &ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1443
948	api_schedule ();	1444	if (expect_true (ta.prev != ta.next))
		1445	{
		1446	TRANSFER (ta);
		1447	return 1;
		1448	}
		1449	else
		1450	return 0;
949	}	1451	}
950		1452
		1453	static int
		1454	api_cede_notself (void)
		1455	{
		1456	dTHX;
		1457	struct transfer_args ta;
		1458
		1459	if (prepare_cede_notself (aTHX_ &ta))
		1460	{
		1461	TRANSFER (ta);
		1462	return 1;
		1463	}
		1464	else
		1465	return 0;
		1466	}
		1467
		1468	static void
		1469	api_trace (SV *coro_sv, int flags)
		1470	{
		1471	dTHX;
		1472	struct coro *coro = SvSTATE (coro_sv);
		1473
		1474	if (flags & CC_TRACE)
		1475	{
		1476	if (!coro->cctx)
		1477	coro->cctx = cctx_new ();
		1478	else if (!(coro->cctx->flags & CC_TRACE))
		1479	croak ("cannot enable tracing on coroutine with custom stack");
		1480
		1481	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1482	}
		1483	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1484	{
		1485	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1486
		1487	if (coro->flags & CF_RUNNING)
		1488	PL_runops = RUNOPS_DEFAULT;
		1489	else
		1490	coro->slot->runops = RUNOPS_DEFAULT;
		1491	}
		1492	}
		1493
951	MODULE = Coro::State PACKAGE = Coro::State	1494	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
952		1495
953	PROTOTYPES: ENABLE	1496	PROTOTYPES: DISABLE
954		1497
955	BOOT:	1498	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1499	{
957	#ifdef USE_ITHREADS	1500	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1501	MUTEX_INIT (&coro_mutex);
959	#endif	1502	#endif
		1503	BOOT_PAGESIZE;
960		1504
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1505	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1506	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1507
		1508	hv_sig = coro_get_hv ("SIG", TRUE);
		1509	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1510	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1511
		1512	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1513	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1514
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1515	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1516
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
969		1521
970	main_mainstack = PL_mainstack;	1522	main_mainstack = PL_mainstack;
		1523	main_top_env = PL_top_env;
		1524
		1525	while (main_top_env->je_prev)
		1526	main_top_env = main_top_env->je_prev;
971		1527
972	coroapi.ver = CORO_API_VERSION;	1528	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1529	coroapi.transfer = api_transfer;
974	}
975		1530
976	Coro::State	1531	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1532	}
978	SV * args	1533
979	PROTOTYPE: $	1534	SV *
		1535	new (char *klass, ...)
980	CODE:	1536	CODE:
981	Coro__State coro;	1537	{
		1538	struct coro *coro;
		1539	HV *hv;
		1540	int i;
982		1541
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1542	Newz (0, coro, 1, struct coro);
		1543	coro->args = newAV ();
		1544	coro->flags = CF_NEW;
987		1545
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1546	if (coro_first) coro_first->prev = coro;
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1547	coro->next = coro_first;
990	/*coro->stack = 0;*/	1548	coro_first = coro;
991		1549
992	/* same as JMPENV_BOOTSTRAP */	1550	coro->hv = hv = newHV ();
993	/* we might be able to recycle start_env, but safe is safe */	1551	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1552	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997		1553
998	RETVAL = coro;	1554	av_extend (coro->args, items - 1);
		1555	for (i = 1; i < items; i++)
		1556	av_push (coro->args, newSVsv (ST (i)));
		1557	}
999	OUTPUT:	1558	OUTPUT:
1000	RETVAL	1559	RETVAL
1001		1560
		1561	# these not obviously related functions are all rolled into the same xs
		1562	# function to increase chances that they all will call transfer with the same
		1563	# stack offset
1002	void	1564	void
1003	transfer(prev, next, flags)	1565	_set_stacklevel (...)
1004	SV *prev	1566	ALIAS:
1005	SV *next	1567	Coro::State::transfer = 1
1006	int flags	1568	Coro::schedule = 2
1007	PROTOTYPE: @	1569	Coro::cede = 3
		1570	Coro::cede_notself = 4
1008	CODE:	1571	CODE:
1009	PUTBACK;	1572	{
1010	SV_CORO (next, "Coro::transfer");	1573	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1574
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1575	switch (ix)
1013	SPAGAIN;	1576	{
		1577	case 0:
		1578	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1579	ta.next = 0;
		1580	break;
		1581
		1582	case 1:
		1583	if (items != 2)
		1584	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1585
		1586	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1587	break;
		1588
		1589	case 2:
		1590	prepare_schedule (aTHX_ &ta);
		1591	break;
		1592
		1593	case 3:
		1594	prepare_cede (aTHX_ &ta);
		1595	break;
		1596
		1597	case 4:
		1598	if (!prepare_cede_notself (aTHX_ &ta))
		1599	XSRETURN_EMPTY;
		1600
		1601	break;
		1602	}
		1603
		1604	BARRIER;
		1605	TRANSFER (ta);
		1606
		1607	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1608	XSRETURN_YES;
		1609	}
		1610
		1611	bool
		1612	_destroy (SV *coro_sv)
		1613	CODE:
		1614	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1615	OUTPUT:
		1616	RETVAL
1014		1617
1015	void	1618	void
1016	DESTROY(coro)
1017	Coro::State coro
1018	CODE:
1019
1020	if (coro->mainstack && coro->mainstack != main_mainstack)
1021	{
1022	struct coro temp;
1023
1024	PUTBACK;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026	LOAD (aTHX_ coro);
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040
1041	void
1042	_exit(code)	1619	_exit (code)
1043	int code	1620	int code
1044	PROTOTYPE: $	1621	PROTOTYPE: $
1045	CODE:	1622	CODE:
1046	_exit (code);	1623	_exit (code);
1047		1624
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1625	int
		1626	cctx_stacksize (int new_stacksize = 0)
		1627	CODE:
		1628	RETVAL = coro_stacksize;
		1629	if (new_stacksize)
		1630	coro_stacksize = new_stacksize;
		1631	OUTPUT:
		1632	RETVAL
1049		1633
1050	# this is slightly dirty (should expose a c-level api)	1634	int
		1635	cctx_count ()
		1636	CODE:
		1637	RETVAL = cctx_count;
		1638	OUTPUT:
		1639	RETVAL
		1640
		1641	int
		1642	cctx_idle ()
		1643	CODE:
		1644	RETVAL = cctx_idle;
		1645	OUTPUT:
		1646	RETVAL
1051		1647
1052	void	1648	void
1053	yield(...)	1649	list ()
1054	PROTOTYPE: @	1650	PPCODE:
		1651	{
		1652	struct coro *coro;
		1653	for (coro = coro_first; coro; coro = coro->next)
		1654	if (coro->hv)
		1655	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1656	}
		1657
		1658	void
		1659	call (Coro::State coro, SV *coderef)
		1660	ALIAS:
		1661	eval = 1
		1662	CODE:
		1663	{
		1664	if (coro->mainstack)
		1665	{
		1666	struct coro temp;
		1667
		1668	if (!(coro->flags & CF_RUNNING))
		1669	{
		1670	save_perl (aTHX_ &temp);
		1671	load_perl (aTHX_ coro);
		1672	}
		1673
		1674	{
		1675	dSP;
		1676	ENTER;
		1677	SAVETMPS;
		1678	PUSHMARK (SP);
		1679	PUTBACK;
		1680
		1681	if (ix)
		1682	eval_sv (coderef, 0);
		1683	else
		1684	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1685
		1686	SPAGAIN;
		1687	FREETMPS;
		1688	LEAVE;
		1689	PUTBACK;
		1690	}
		1691
		1692	if (!(coro->flags & CF_RUNNING))
		1693	{
		1694	save_perl (aTHX_ coro);
		1695	load_perl (aTHX_ &temp);
		1696	}
		1697	}
		1698	}
		1699
		1700	SV *
		1701	is_ready (Coro::State coro)
		1702	PROTOTYPE: $
		1703	ALIAS:
		1704	is_ready = CF_READY
		1705	is_running = CF_RUNNING
		1706	is_new = CF_NEW
		1707	is_destroyed = CF_DESTROYED
		1708	CODE:
		1709	RETVAL = boolSV (coro->flags & ix);
		1710	OUTPUT:
		1711	RETVAL
		1712
		1713	void
		1714	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1715
		1716	SV *
		1717	has_stack (Coro::State coro)
		1718	PROTOTYPE: $
		1719	CODE:
		1720	RETVAL = boolSV (!!coro->cctx);
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	int
		1725	is_traced (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	IV
		1733	rss (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	usecount = 1
1055	CODE:	1737	CODE:
1056	SV *yieldstack;	1738	switch (ix)
1057	SV *sv;	1739	{
1058	AV *defav = GvAV (PL_defgv);	1740	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	struct coro *prev, *next;	1741	case 1: RETVAL = coro->usecount; break;
1060
1061	yieldstack = *hv_fetch (
1062	(HV *)SvRV (GvSV (coro_current)),
1063	"yieldstack", sizeof ("yieldstack") - 1,
1064	0	1742	}
1065	);	1743	OUTPUT:
		1744	RETVAL
1066		1745
1067	/* set up @_ -- ugly */
1068	av_clear (defav);
1069	av_fill (defav, items - 1);
1070	while (items--)
1071	av_store (defav, items, SvREFCNT_inc (ST(items)));
1072
1073	sv = av_pop ((AV *)SvRV (yieldstack));
1074	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1075	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1076	SvREFCNT_dec (sv);
1077
1078	transfer (aTHX_ prev, next, 0);
1079		1746
1080	MODULE = Coro::State PACKAGE = Coro	1747	MODULE = Coro::State PACKAGE = Coro
1081		1748
1082	# this is slightly dirty (should expose a c-level api)
1083
1084	BOOT:	1749	BOOT:
1085	{	1750	{
1086	int i;	1751	int i;
		1752
		1753	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1754	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1755	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1756
		1757	coro_current = coro_get_sv ("Coro::current", FALSE);
		1758	SvREADONLY_on (coro_current);
		1759
1087	HV *stash = gv_stashpv ("Coro", TRUE);	1760	coro_stash = gv_stashpv ("Coro", TRUE);
1088		1761
1089	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1762	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1090	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1763	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1091	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1764	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1092	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1765	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1093	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1766	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1094	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1767	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1095
1096	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1097	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1098		1768
1099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1769	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1100	coro_ready[i] = newAV ();	1770	coro_ready[i] = newAV ();
1101		1771
1102	{	1772	{
1103	SV *sv = perl_get_sv("Coro::API", 1);	1773	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1774	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1104		1775
1105	coroapi.schedule = api_schedule;	1776	coroapi.schedule = api_schedule;
1106	coroapi.cede = api_cede;	1777	coroapi.cede = api_cede;
		1778	coroapi.cede_notself = api_cede_notself;
1107	coroapi.ready = api_ready;	1779	coroapi.ready = api_ready;
		1780	coroapi.is_ready = api_is_ready;
1108	coroapi.nready = &coro_nready;	1781	coroapi.nready = &coro_nready;
1109	coroapi.current = coro_current;	1782	coroapi.current = coro_current;
1110		1783
1111	GCoroAPI = &coroapi;	1784	GCoroAPI = &coroapi;
1112	sv_setiv(sv, (IV)&coroapi);	1785	sv_setiv (sv, (IV)&coroapi);
1113	SvREADONLY_on(sv);	1786	SvREADONLY_on (sv);
1114	}	1787	}
1115	}	1788	}
1116		1789
1117	#if !PERL_MICRO
1118
1119	void	1790	void
1120	ready(self)	1791	_set_current (SV *current)
1121	SV * self
1122	PROTOTYPE: $	1792	PROTOTYPE: $
1123	CODE:	1793	CODE:
1124	api_ready (self);	1794	SvREFCNT_dec (SvRV (coro_current));
1125		1795	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1126	#endif
1127		1796
1128	int	1797	int
		1798	prio (Coro::State coro, int newprio = 0)
		1799	ALIAS:
		1800	nice = 1
		1801	CODE:
		1802	{
		1803	RETVAL = coro->prio;
		1804
		1805	if (items > 1)
		1806	{
		1807	if (ix)
		1808	newprio = coro->prio - newprio;
		1809
		1810	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1811	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1812
		1813	coro->prio = newprio;
		1814	}
		1815	}
		1816	OUTPUT:
		1817	RETVAL
		1818
		1819	SV *
		1820	ready (SV *self)
		1821	PROTOTYPE: $
		1822	CODE:
		1823	RETVAL = boolSV (api_ready (self));
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	int
1129	nready(...)	1828	nready (...)
1130	PROTOTYPE:	1829	PROTOTYPE:
1131	CODE:	1830	CODE:
1132	RETVAL = coro_nready;	1831	RETVAL = coro_nready;
1133	OUTPUT:	1832	OUTPUT:
1134	RETVAL	1833	RETVAL
1135		1834
1136	void	1835	void
1137	schedule(...)	1836	throw (Coro::State self, SV *throw = &PL_sv_undef)
1138	PROTOTYPE:	1837	PROTOTYPE: $;$
		1838	CODE:
		1839	SvREFCNT_dec (self->throw);
		1840	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1841
		1842	# for async_pool speedup
		1843	void
		1844	_pool_1 (SV *cb)
1139	CODE:	1845	CODE:
1140	api_schedule ();	1846	{
		1847	struct coro *coro = SvSTATE (coro_current);
		1848	HV *hv = (HV *)SvRV (coro_current);
		1849	AV *defav = GvAV (PL_defgv);
		1850	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1851	AV *invoke_av;
		1852	int i, len;
		1853
		1854	if (!invoke)
		1855	croak ("\3async_pool terminate\2\n");
		1856
		1857	SvREFCNT_dec (coro->saved_deffh);
		1858	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1859
		1860	hv_store (hv, "desc", sizeof ("desc") - 1,
		1861	newSVpvn (strpair ("[async_pool]")), 0);
		1862
		1863	invoke_av = (AV *)SvRV (invoke);
		1864	len = av_len (invoke_av);
		1865
		1866	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1867
		1868	if (len > 0)
		1869	{
		1870	av_fill (defav, len - 1);
		1871	for (i = 0; i < len; ++i)
		1872	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1873	}
		1874
		1875	SvREFCNT_dec (invoke);
		1876	}
1141		1877
1142	void	1878	void
1143	cede(...)	1879	_pool_2 (SV *cb)
1144	PROTOTYPE:
1145	CODE:	1880	CODE:
1146	api_cede ();	1881	{
		1882	struct coro *coro = SvSTATE (coro_current);
1147		1883
		1884	sv_setsv (cb, &PL_sv_undef);
		1885
		1886	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1887	coro->saved_deffh = 0;
		1888
		1889	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1890	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1891	croak ("\3async_pool terminate\2\n");
		1892
		1893	av_clear (GvAV (PL_defgv));
		1894	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1895	newSVpvn (strpair ("[async_pool idle]")), 0);
		1896
		1897	coro->prio = 0;
		1898
		1899	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1900	api_trace (coro_current, 0);
		1901
		1902	av_push (av_async_pool, newSVsv (coro_current));
		1903	}
		1904
		1905
		1906	MODULE = Coro::State PACKAGE = Coro::AIO
		1907
		1908	SV *
		1909	_get_state ()
		1910	CODE:
		1911	{
		1912	struct io_state *data;
		1913
		1914	RETVAL = newSV (sizeof (struct io_state));
		1915	data = (struct io_state *)SvPVX (RETVAL);
		1916	SvCUR_set (RETVAL, sizeof (struct io_state));
		1917	SvPOK_only (RETVAL);
		1918
		1919	data->errorno = errno;
		1920	data->laststype = PL_laststype;
		1921	data->laststatval = PL_laststatval;
		1922	data->statcache = PL_statcache;
		1923	}
		1924	OUTPUT:
		1925	RETVAL
		1926
		1927	void
		1928	_set_state (char *data_)
		1929	PROTOTYPE: $
		1930	CODE:
		1931	{
		1932	struct io_state *data = (void *)data_;
		1933
		1934	errno = data->errorno;
		1935	PL_laststype = data->laststype;
		1936	PL_laststatval = data->laststatval;
		1937	PL_statcache = data->statcache;
		1938	}
		1939

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