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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.54 by pcg, Sat Mar 13 06:45:04 2004 UTC vs.
Revision 1.211 by root, Wed Oct 10 03:37:58 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
		5
1	#include "EXTERN.h"	6	#include "EXTERN.h"
2	#include "perl.h"	7	#include "perl.h"
3	#include "XSUB.h"	8	#include "XSUB.h"
4		9
5	#include "patchlevel.h"	10	#include "patchlevel.h"
6		11
7	#if PATCHLEVEL < 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)
8	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
10	# endif	59	# endif
11	# ifndef call_sv	60	# ifndef call_sv
12	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
25	# endif	74	# endif
26	#endif	75	#endif
27		76
28	#include "libcoro/coro.c"	77	/* 5.8.7 */
29		78	#ifndef SvRV_set
30	#include <signal.h>	79	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	80	#endif
42	#endif
43		81
44	#define SUB_INIT "Coro::State::initialize"	82	/* 5.8.8 */
45	#define UCORO_STATE "_coro_state"	83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
46		89
47	/* The next macro should declare a variable stacklevel that contains and approximation	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
48	* to the current C stack pointer. Its property is that it changes with each call	91	# undef CORO_STACKGUARD
49	* and should be unique. */	92	#endif
		93
		94	#ifndef CORO_STACKGUARD
		95	# define CORO_STACKGUARD 0
		96	#endif
		97
		98	/* prefer perl internal functions over our own? */
		99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
		102
		103	/* The next macros try to return the current stack pointer, in an as
		104	* portable way as possible. */
		105	#define dSTACKLEVEL volatile char stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	106	#define STACKLEVEL ((void *)&stacklevel)
51		107
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		109
54	#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))
55		124
56	#include "CoroAPI.h"	125	#include "CoroAPI.h"
57		126
		127	#ifdef USE_ITHREADS
		128	static perl_mutex coro_mutex;
		129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		131	#else
		132	# define LOCK (void)0
		133	# define UNLOCK (void)0
		134	#endif
		135
		136	#define strpair(const) const, sizeof (const) - 1
		137
		138	/* helper storage struct for Coro::AIO */
		139	struct io_state
		140	{
		141	int errorno;
		142	I32 laststype;
		143	int laststatval;
		144	Stat_t statcache;
		145	};
		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
58	static struct CoroAPI coroapi;	148	static struct CoroAPI coroapi;
		149	static AV *main_mainstack; /* used to differentiate between $main and others */
		150	static JMPENV *main_top_env;
		151	static HV *coro_state_stash, *coro_stash;
		152	static SV *coro_mortal; /* will be freed after next transfer */
59		153
60	/* this is actually not only the c stack but also c registers etc... */	154	static GV *irsgv; /* $/ */
		155	static GV *stdoutgv; /* *STDOUT */
		156
		157	static HV *hv_sig; /* %SIG */
		158	static SV *sv_diehook;
		159	static SV *sv_warnhook;
		160
		161	/* async_pool helper stuff */
		162	static SV *sv_pool_rss;
		163	static SV *sv_pool_size;
		164	static AV *av_async_pool;
		165
		166	static struct coro_cctx *cctx_first;
		167	static int cctx_count, cctx_idle;
		168
		169	enum {
		170	CC_MAPPED = 0x01,
		171	CC_NOREUSE = 0x02, /* throw this away after tracing */
		172	CC_TRACE = 0x04,
		173	CC_TRACE_SUB = 0x08, /* trace sub calls */
		174	CC_TRACE_LINE = 0x10, /* trace each statement */
		175	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		176	};
		177
		178	/* this is a structure representing a c-level coroutine */
		179	typedef struct coro_cctx {
		180	struct coro_cctx *next;
		181
		182	/* the stack */
		183	void *sptr;
		184	size_t ssize;
		185
		186	/* cpu state */
		187	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		188	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		189	JMPENV *top_env;
		190	coro_context cctx;
		191
		192	#if CORO_USE_VALGRIND
		193	int valgrind_id;
		194	#endif
		195	unsigned char flags;
		196	} coro_cctx;
		197
		198	enum {
		199	CF_RUNNING = 0x0001, /* coroutine is running */
		200	CF_READY = 0x0002, /* coroutine is ready */
		201	CF_NEW = 0x0004, /* has never been switched to */
		202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		203	};
		204
		205	/* the structure where most of the perl state is stored, overlaid on the cxstack */
61	typedef struct {	206	typedef struct {
62	int refcnt; /* pointer reference counter */	207	SV *defsv;
63	int usecnt; /* shared by how many coroutines */	208	AV *defav;
64	int gencnt; /* generation counter */	209	SV *errsv;
		210	SV *irsgv;
		211	#define VAR(name,type) type name;
		212	# include "state.h"
		213	#undef VAR
		214	} perl_slots;
65		215
66	coro_context cctx;	216	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
67		217
68	void *sptr;	218	/* this is a structure representing a perl-level coroutine */
69	long ssize; /* positive == mmap, otherwise malloc */
70	} coro_stack;
71
72	struct coro {	219	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	220	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;	221	coro_cctx *cctx;
75		222
76	/* the optional C context */	223	/* process data */
77	coro_stack *stack;
78	void *cursp;
79	int gencnt;
80
81	/* optionally saved, might be zero */
82	AV *defav;
83	SV *defsv;
84	SV *errsv;
85
86	/* saved global state not related to stacks */
87	U8 dowarn;
88	I32 in_eval;
89
90	/* the stacks and related info (callchain etc..) */
91	PERL_SI *curstackinfo;
92	AV *curstack;
93	AV *mainstack;	224	AV *mainstack;
94	SV **stack_sp;	225	perl_slots *slot; /* basically the saved sp */
95	OP *op;
96	SV **curpad;
97	AV *comppad;
98	SV **stack_base;
99	SV **stack_max;
100	SV **tmps_stack;
101	I32 tmps_floor;
102	I32 tmps_ix;
103	I32 tmps_max;
104	I32 *markstack;
105	I32 *markstack_ptr;
106	I32 *markstack_max;
107	I32 *scopestack;
108	I32 scopestack_ix;
109	I32 scopestack_max;
110	ANY *savestack;
111	I32 savestack_ix;
112	I32 savestack_max;
113	OP **retstack;
114	I32 retstack_ix;
115	I32 retstack_max;
116	COP *curcop;
117	JMPENV *top_env;
118		226
119	/* data associated with this coroutine (initial args) */	227	AV *args; /* data associated with this coroutine (initial args) */
120	AV *args;	228	int refcnt; /* coroutines are refcounted, yes */
		229	int flags; /* CF_ flags */
		230	HV *hv; /* the perl hash associated with this coro, if any */
		231
		232	/* statistics */
		233	int usecount; /* number of transfers to this coro */
		234
		235	/* coro process data */
		236	int prio;
		237	SV *throw; /* exception to be thrown */
		238
		239	/* async_pool */
		240	SV *saved_deffh;
		241
		242	/* linked list */
		243	struct coro *next, *prev;
121	};	244	};
122		245
123	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
125		248
126	static AV *main_mainstack; /* used to differentiate between $main and others */	249	/** Coro ********************************************************************/
127	static HV *coro_state_stash;
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV *coro_mortal; /* will be freed after next transfer */
132		250
133	/* mostly copied from op.c:cv_clone2 */	251	#define PRIO_MAX 3
134	STATIC AV *	252	#define PRIO_HIGH 1
135	clone_padlist (AV *protopadlist)	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)
136	{	268	{
137	AV *av;	269	#if PERL_VERSION_ATLEAST (5,9,0)
138	I32 ix;	270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
139	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	271	get_sv (name, create);
140	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	272	#endif
141	SV **pname = AvARRAY (protopad_name);	273	return get_sv (name, create);
142	SV **ppad = AvARRAY (protopad);	274	}
143	I32 fname = AvFILLp (protopad_name);	275
144	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);
145	AV *newpadlist, *newpad_name, *newpad;	300	AV *newpadlist, *newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		301
156	newpadlist = newAV ();	302	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	303	AvREAL_off (newpadlist);
158	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)));
159	av_store (newpadlist, 1, (SV *) newpad);	313	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char *name = SvPVX (namesv); /* XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV *kid = cv_clone((CV*)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225		314
226	return newpadlist;	315	return newpadlist;
227	}	316	}
228		317
229	STATIC void	318	static void
230	free_padlist (AV *padlist)	319	free_padlist (pTHX_ AV *padlist)
231	{	320	{
232	/* may be during global destruction */	321	/* may be during global destruction */
233	if (SvREFCNT (padlist))	322	if (SvREFCNT (padlist))
234	{	323	{
235	I32 i = AvFILLp (padlist);	324	I32 i = AvFILLp (padlist);
…		…
248		337
249	SvREFCNT_dec ((SV*)padlist);	338	SvREFCNT_dec ((SV*)padlist);
250	}	339	}
251	}	340	}
252		341
253	STATIC int	342	static int
254	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	343	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255	{	344	{
256	AV *padlist;	345	AV *padlist;
257	AV *av = (AV *)mg->mg_obj;	346	AV *av = (AV *)mg->mg_obj;
258		347
259	/* casting is fun. */	348	/* casting is fun. */
260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	349	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261	free_padlist (padlist);	350	free_padlist (aTHX_ padlist);
		351
		352	SvREFCNT_dec (av);
		353
		354	return 0;
262	}	355	}
263		356
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		358
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		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
268	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
269	STATIC void	395	static void
270	get_padlist (CV *cv)	396	get_padlist (pTHX_ CV *cv)
271	{	397	{
272	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
273		400
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
275	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276	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
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		413	#endif
		414	}
278	}	415	}
279		416
280	STATIC void	417	static void
281	put_padlist (CV *cv)	418	put_padlist (pTHX_ CV *cv)
282	{	419	{
283	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	420	MAGIC *mg = CORO_MAGIC (cv);
		421	AV *av;
284		422
285	if (!mg)	423	if (expect_false (!mg))
286	{	424	{
287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
290	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
291	}	429	}
292		430
293	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	431	av = (AV *)mg->mg_obj;
294	}
295		432
296	#define SB do {	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
297	#define SE } while (0)	434	av_extend (av, AvMAX (av) + 1);
298		435
299	#define LOAD(state) load_state(aTHX_ (state));	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	437	}
301		438
302	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	439	/** load & save, init *******************************************************/
303		440
304	static void	441	static void
305	load_state(pTHX_ Coro__State c)	442	load_perl (pTHX_ Coro__State c)
306	{	443	{
307	PL_dowarn = c->dowarn;	444	perl_slots *slot = c->slot;
308	PL_in_eval = c->in_eval;	445	c->slot = 0;
309		446
310	PL_curstackinfo = c->curstackinfo;
311	PL_curstack = c->curstack;
312	PL_mainstack = c->mainstack;	447	PL_mainstack = c->mainstack;
313	PL_stack_sp = c->stack_sp;
314	PL_op = c->op;
315	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;
317	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;
322	PL_tmps_max = c->tmps_max;
323	PL_markstack = c->markstack;
324	PL_markstack_ptr = c->markstack_ptr;
325	PL_markstack_max = c->markstack_max;
326	PL_scopestack = c->scopestack;
327	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;
332	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;
335	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337		448
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	449	GvSV (PL_defgv) = slot->defsv;
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	450	GvAV (PL_defgv) = slot->defav;
340	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);*/
341		460
342	{	461	{
343	dSP;	462	dSP;
		463
344	CV *cv;	464	CV *cv;
345		465
346	/* now do the ugly restore mess */	466	/* now do the ugly restore mess */
347	while ((cv = (CV *)POPs))	467	while (expect_true (cv = (CV *)POPs))
348	{	468	{
349	AV *padlist = (AV *)POPs;
350
351	if (padlist)
352	{
353	put_padlist (cv); /* mark this padlist as available */	469	put_padlist (aTHX_ cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	470	CvDEPTH (cv) = PTR2IV (POPs);
355	#ifdef USE_THREADS	471	CvPADLIST (cv) = (AV *)POPs;
356	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357	#endif
358	}
359
360	++CvDEPTH(cv);
361	}	472	}
362		473
363	PUTBACK;	474	PUTBACK;
364	}	475	}
365	}	476	}
366		477
367	static void	478	static void
368	save_state(pTHX_ Coro__State c, int flags)	479	save_perl (pTHX_ Coro__State c)
369	{	480	{
370	{	481	{
371	dSP;	482	dSP;
372	I32 cxix = cxstack_ix;	483	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	484	PERL_CONTEXT *ccstk = cxstack;
…		…
376	/*	487	/*
377	* 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
378	* (and reinitialize) all cv's in the whole callchain :(	489	* (and reinitialize) all cv's in the whole callchain :(
379	*/	490	*/
380		491
381	PUSHs (Nullsv);	492	XPUSHs (Nullsv);
382	/* this loop was inspired by pp_caller */	493	/* this loop was inspired by pp_caller */
383	for (;;)	494	for (;;)
384	{	495	{
385	while (cxix >= 0)	496	while (expect_true (cxix >= 0))
386	{	497	{
387	PERL_CONTEXT *cx = &ccstk[cxix--];	498	PERL_CONTEXT *cx = &ccstk[cxix--];
388		499
389	if (CxTYPE(cx) == CXt_SUB)	500	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
390	{	501	{
391	CV *cv = cx->blk_sub.cv;	502	CV *cv = cx->blk_sub.cv;
		503
392	if (CvDEPTH(cv))	504	if (expect_true (CvDEPTH (cv)))
393	{	505	{
394	#ifdef USE_THREADS
395	/*XPUSHs ((SV *)CvOWNER(cv));*/
396	/*CvOWNER(cv) = 0;*/
397	/*error must unlock this cv etc.. etc...*/
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	506	EXTEND (SP, 3);
400
401	while (--CvDEPTH(cv))
402	{
403	/* this tells the restore code to increment CvDEPTH */
404	PUSHs (Nullsv);
405	PUSHs ((SV *)cv);
406	}
407
408	PUSHs ((SV *)CvPADLIST(cv));	507	PUSHs ((SV *)CvPADLIST (cv));
		508	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
409	PUSHs ((SV *)cv);	509	PUSHs ((SV *)cv);
410		510
411	get_padlist (cv); /* this is a monster */	511	CvDEPTH (cv) = 0;
		512	get_padlist (aTHX_ cv);
412	}	513	}
413	}	514	}
414	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)
416	{
417	/* I never used formats, so how should I know how these are implemented? */
418	/* my bold guess is as a simple, plain sub... */
419	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420	}
421	#endif
422	}	515	}
423		516
424	if (top_si->si_type == PERLSI_MAIN)	517	if (expect_true (top_si->si_type == PERLSI_MAIN))
425	break;	518	break;
426		519
427	top_si = top_si->si_prev;	520	top_si = top_si->si_prev;
428	ccstk = top_si->si_cxstack;	521	ccstk = top_si->si_cxstack;
429	cxix = top_si->si_cxix;	522	cxix = top_si->si_cxix;
430	}	523	}
431		524
432	PUTBACK;	525	PUTBACK;
433	}	526	}
434		527
435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	528	/* allocate some space on the context stack for our purposes */
436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	529	/* we manually unroll here, as usually 2 slots is enough */
437	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 */
438		539
439	c->dowarn = PL_dowarn;
440	c->in_eval = PL_in_eval;
441
442	c->curstackinfo = PL_curstackinfo;
443	c->curstack = PL_curstack;
444	c->mainstack = PL_mainstack;	540	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;	541
446	c->op = PL_op;	542	{
447	c->curpad = PL_curpad;	543	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
448	c->comppad = PL_comppad;	544
449	c->stack_base = PL_stack_base;	545	slot->defav = GvAV (PL_defgv);
450	c->stack_max = PL_stack_max;	546	slot->defsv = DEFSV;
451	c->tmps_stack = PL_tmps_stack;	547	slot->errsv = ERRSV;
452	c->tmps_floor = PL_tmps_floor;	548	slot->irsgv = GvSV (irsgv);
453	c->tmps_ix = PL_tmps_ix;	549
454	c->tmps_max = PL_tmps_max;	550	#define VAR(name,type) slot->name = PL_ ## name;
455	c->markstack = PL_markstack;	551	# include "state.h"
456	c->markstack_ptr = PL_markstack_ptr;	552	#undef VAR
457	c->markstack_max = PL_markstack_max;	553	}
458	c->scopestack = PL_scopestack;
459	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;
464	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;
467	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	554	}
470		555
471	/*	556	/*
472	* allocate various perl stacks. This is an exact copy	557	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	558	* of perl.c:init_stacks, except that it uses less memory
474	* on the (sometimes correct) assumption that coroutines do	559	* on the (sometimes correct) assumption that coroutines do
475	* not usually need a lot of stackspace.	560	* not usually need a lot of stackspace.
476	*/	561	*/
477	STATIC void	562	#if CORO_PREFER_PERL_FUNCTIONS
		563	# define coro_init_stacks init_stacks
		564	#else
		565	static void
478	coro_init_stacks (pTHX)	566	coro_init_stacks (pTHX)
479	{	567	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	568	PL_curstackinfo = new_stackinfo(32, 8);
481	PL_curstackinfo->si_type = PERLSI_MAIN;	569	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	570	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	571	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484		572
485	PL_stack_base = AvARRAY(PL_curstack);	573	PL_stack_base = AvARRAY(PL_curstack);
486	PL_stack_sp = PL_stack_base;	574	PL_stack_sp = PL_stack_base;
487	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	575	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488		576
489	New(50,PL_tmps_stack,96,SV*);	577	New(50,PL_tmps_stack,32,SV*);
490	PL_tmps_floor = -1;	578	PL_tmps_floor = -1;
491	PL_tmps_ix = -1;	579	PL_tmps_ix = -1;
492	PL_tmps_max = 96;	580	PL_tmps_max = 32;
493		581
494	New(54,PL_markstack,16,I32);	582	New(54,PL_markstack,16,I32);
495	PL_markstack_ptr = PL_markstack;	583	PL_markstack_ptr = PL_markstack;
496	PL_markstack_max = PL_markstack + 16;	584	PL_markstack_max = PL_markstack + 16;
497		585
498	#ifdef SET_MARK_OFFSET	586	#ifdef SET_MARK_OFFSET
499	SET_MARK_OFFSET;	587	SET_MARK_OFFSET;
500	#endif	588	#endif
501		589
502	New(54,PL_scopestack,16,I32);	590	New(54,PL_scopestack,8,I32);
503	PL_scopestack_ix = 0;	591	PL_scopestack_ix = 0;
504	PL_scopestack_max = 16;	592	PL_scopestack_max = 8;
505		593
506	New(54,PL_savestack,96,ANY);	594	New(54,PL_savestack,24,ANY);
507	PL_savestack_ix = 0;	595	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	596	PL_savestack_max = 24;
509		597
		598	#if !PERL_VERSION_ATLEAST (5,9,0)
510	New(54,PL_retstack,8,OP*);	599	New(54,PL_retstack,4,OP*);
511	PL_retstack_ix = 0;	600	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	601	PL_retstack_max = 4;
		602	#endif
513	}	603	}
		604	#endif
514		605
515	/*	606	/*
516	* destroy the stacks, the callchain etc...	607	* destroy the stacks, the callchain etc...
517	*/	608	*/
518	STATIC void	609	static void
519	destroy_stacks(pTHX)	610	coro_destroy_stacks (pTHX)
520	{	611	{
521	if (!IN_DESTRUCT)
522	{
523	/* is this ugly, I ask? */
524	LEAVE_SCOPE (0);
525
526	/* sure it is, but more important: is it correct?? :/ */
527	FREETMPS;
528	}
529
530	while (PL_curstackinfo->si_next)	612	while (PL_curstackinfo->si_next)
531	PL_curstackinfo = PL_curstackinfo->si_next;	613	PL_curstackinfo = PL_curstackinfo->si_next;
532		614
533	while (PL_curstackinfo)	615	while (PL_curstackinfo)
534	{	616	{
535	PERL_SI *p = PL_curstackinfo->si_prev;	617	PERL_SI *p = PL_curstackinfo->si_prev;
536		618
537	{
538	dSP;
539	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540	PUTBACK; /* possibly superfluous */
541	}
542
543	if (!IN_DESTRUCT)	619	if (!IN_DESTRUCT)
544	{
545	dounwind(-1);
546	SvREFCNT_dec(PL_curstackinfo->si_stack);	620	SvREFCNT_dec (PL_curstackinfo->si_stack);
547	}
548		621
549	Safefree(PL_curstackinfo->si_cxstack);	622	Safefree (PL_curstackinfo->si_cxstack);
550	Safefree(PL_curstackinfo);	623	Safefree (PL_curstackinfo);
551	PL_curstackinfo = p;	624	PL_curstackinfo = p;
552	}	625	}
553		626
554	Safefree(PL_tmps_stack);	627	Safefree (PL_tmps_stack);
555	Safefree(PL_markstack);	628	Safefree (PL_markstack);
556	Safefree(PL_scopestack);	629	Safefree (PL_scopestack);
557	Safefree(PL_savestack);	630	Safefree (PL_savestack);
		631	#if !PERL_VERSION_ATLEAST (5,9,0)
558	Safefree(PL_retstack);	632	Safefree (PL_retstack);
559	}
560
561	static void
562	allocate_stack (Coro__State ctx, int alloc)
563	{
564	coro_stack *stack;
565
566	New (0, stack, 1, coro_stack);
567
568	stack->refcnt = 1;
569	stack->usecnt = 1;
570	stack->gencnt = ctx->gencnt = 0;
571	if (alloc)
572	{
573	#if HAVE_MMAP
574	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
575	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
576	if (stack->sptr == (void *)-1)
577	#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)
578	{	647	{
579	/*FIXME*//*D*//* reasonable stack size! */	648	slot = &tmp_slot;
580	stack->ssize = - (8192 * sizeof (long));	649
581	New (0, stack->sptr, 8192, long);	650	#define VAR(name,type) slot->name = PL_ ## name;
		651	# include "state.h"
		652	#undef VAR
582	}	653	}
583	}
584	else
585	stack->sptr = 0;
586
587	ctx->stack = stack;
588	}
589
590	static void
591	deallocate_stack (Coro__State ctx)
592	{
593	coro_stack *stack = ctx->stack;
594
595	ctx->stack = 0;
596
597	if (stack)
598	{
599	if (!--stack->refcnt)
600	{
601	#ifdef HAVE_MMAP
602	if (stack->ssize > 0 && stack->sptr)
603	munmap (stack->sptr, stack->ssize);
604	else	654	else
605	#endif	655	slot = coro->slot;
606	Safefree (stack->sptr);
607		656
608	Safefree (stack);	657	rss += sizeof (slot->curstackinfo);
609	}	658	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
610	else if (ctx->gencnt == stack->gencnt)	659	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
611	--stack->usecnt;	660	rss += slot->tmps_max * sizeof (SV *);
612	}	661	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
613	}	662	rss += slot->scopestack_max * sizeof (I32);
		663	rss += slot->savestack_max * sizeof (ANY);
614		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
615	static void	675	static void
616	setup_coro (void *arg)	676	coro_setup (pTHX_ struct coro *coro)
617	{	677	{
618	/*	678	/*
619	* emulate part of the perl startup here.	679	* emulate part of the perl startup here.
620	*/	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	/* this newly created coroutine might be run on an existing cctx which most
		719	* likely was suspended in set_stacklevel, called from entersub.
		720	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		721	* so we ENTER here for symmetry
		722	*/
		723	ENTER;
		724	}
		725
		726	static void
		727	coro_destroy (pTHX_ struct coro *coro)
		728	{
		729	if (!IN_DESTRUCT)
		730	{
		731	/* restore all saved variables and stuff */
		732	LEAVE_SCOPE (0);
		733	assert (PL_tmps_floor == -1);
		734
		735	/* free all temporaries */
		736	FREETMPS;
		737	assert (PL_tmps_ix == -1);
		738
		739	/* unwind all extra stacks */
		740	POPSTACK_TO (PL_mainstack);
		741
		742	/* unwind main stack */
		743	dounwind (-1);
		744	}
		745
		746	SvREFCNT_dec (GvSV (PL_defgv));
		747	SvREFCNT_dec (GvAV (PL_defgv));
		748	SvREFCNT_dec (GvSV (PL_errgv));
		749	SvREFCNT_dec (PL_defoutgv);
		750	SvREFCNT_dec (PL_rs);
		751	SvREFCNT_dec (GvSV (irsgv));
		752
		753	SvREFCNT_dec (PL_diehook);
		754	SvREFCNT_dec (PL_warnhook);
		755
		756	SvREFCNT_dec (coro->saved_deffh);
		757	SvREFCNT_dec (coro->throw);
		758
		759	coro_destroy_stacks (aTHX);
		760	}
		761
		762	static void
		763	free_coro_mortal (pTHX)
		764	{
		765	if (expect_true (coro_mortal))
		766	{
		767	SvREFCNT_dec (coro_mortal);
		768	coro_mortal = 0;
		769	}
		770	}
		771
		772	static int
		773	runops_trace (pTHX)
		774	{
		775	COP *oldcop = 0;
		776	int oldcxix = -2;
		777	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		778	coro_cctx *cctx = coro->cctx;
		779
		780	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		781	{
		782	PERL_ASYNC_CHECK ();
		783
		784	if (cctx->flags & CC_TRACE_ALL)
		785	{
		786	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		787	{
		788	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		789	SV **bot, **top;
		790	AV *av = newAV (); /* return values */
		791	SV **cb;
		792	dSP;
		793
		794	GV *gv = CvGV (cx->blk_sub.cv);
		795	SV *fullname = sv_2mortal (newSV (0));
		796	if (isGV (gv))
		797	gv_efullname3 (fullname, gv, 0);
		798
		799	bot = PL_stack_base + cx->blk_oldsp + 1;
		800	top = cx->blk_gimme == G_ARRAY ? SP + 1
		801	: cx->blk_gimme == G_SCALAR ? bot + 1
		802	: bot;
		803
		804	av_extend (av, top - bot);
		805	while (bot < top)
		806	av_push (av, SvREFCNT_inc (*bot++));
		807
		808	PL_runops = RUNOPS_DEFAULT;
		809	ENTER;
		810	SAVETMPS;
		811	EXTEND (SP, 3);
		812	PUSHMARK (SP);
		813	PUSHs (&PL_sv_no);
		814	PUSHs (fullname);
		815	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		816	PUTBACK;
		817	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		818	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		819	SPAGAIN;
		820	FREETMPS;
		821	LEAVE;
		822	PL_runops = runops_trace;
		823	}
		824
		825	if (oldcop != PL_curcop)
		826	{
		827	oldcop = PL_curcop;
		828
		829	if (PL_curcop != &PL_compiling)
		830	{
		831	SV **cb;
		832
		833	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		834	{
		835	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		836
		837	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		838	{
		839	runops_proc_t old_runops = PL_runops;
		840	dSP;
		841	GV *gv = CvGV (cx->blk_sub.cv);
		842	SV *fullname = sv_2mortal (newSV (0));
		843
		844	if (isGV (gv))
		845	gv_efullname3 (fullname, gv, 0);
		846
		847	PL_runops = RUNOPS_DEFAULT;
		848	ENTER;
		849	SAVETMPS;
		850	EXTEND (SP, 3);
		851	PUSHMARK (SP);
		852	PUSHs (&PL_sv_yes);
		853	PUSHs (fullname);
		854	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		855	PUTBACK;
		856	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		857	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		858	SPAGAIN;
		859	FREETMPS;
		860	LEAVE;
		861	PL_runops = runops_trace;
		862	}
		863
		864	oldcxix = cxstack_ix;
		865	}
		866
		867	if (cctx->flags & CC_TRACE_LINE)
		868	{
		869	dSP;
		870
		871	PL_runops = RUNOPS_DEFAULT;
		872	ENTER;
		873	SAVETMPS;
		874	EXTEND (SP, 3);
		875	PL_runops = RUNOPS_DEFAULT;
		876	PUSHMARK (SP);
		877	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		878	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		879	PUTBACK;
		880	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		881	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		882	SPAGAIN;
		883	FREETMPS;
		884	LEAVE;
		885	PL_runops = runops_trace;
		886	}
		887	}
		888	}
		889	}
		890	}
		891
		892	TAINT_NOT;
		893	return 0;
		894	}
		895
		896	/* inject a fake call to Coro::State::_cctx_init into the execution */
		897	/* _cctx_init should be careful, as it could be called at almost any time */
		898	/* during execution of a perl program */
		899	static void NOINLINE
		900	cctx_prepare (pTHX_ coro_cctx *cctx)
		901	{
621	dSP;	902	dSP;
622	Coro__State ctx = (Coro__State)arg;	903	LOGOP myop;
623	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
624		904
625	coro_init_stacks (aTHX);	905	PL_top_env = &PL_start_env;
626	/*PL_curcop = 0;*/
627	/*PL_in_eval = PL_in_eval;*/ /* inherit */
628	SvREFCNT_dec (GvAV (PL_defgv));
629	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
630		906
		907	if (cctx->flags & CC_TRACE)
		908	PL_runops = runops_trace;
		909
		910	Zero (&myop, 1, LOGOP);
		911	myop.op_next = PL_op;
		912	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		913
		914	PUSHMARK (SP);
		915	EXTEND (SP, 2);
		916	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		917	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		918	PUTBACK;
		919	PL_op = (OP *)&myop;
		920	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631	SPAGAIN;	921	SPAGAIN;
		922	}
632		923
633	if (ctx->stack)	924	/*
634	{	925	* this is a _very_ stripped down perl interpreter ;)
635	ctx->cursp = 0;	926	*/
		927	static void
		928	cctx_run (void *arg)
		929	{
		930	dTHX;
636		931
637	PUSHMARK(SP);	932	/* cctx_run is the alternative tail of transfer(), so unlock here. */
638	PUTBACK;	933	UNLOCK;
639	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
640		934
641	if (SvTRUE (ERRSV))	935	/* we now skip the entersub that lead to transfer() */
642	croak (NULL);	936	PL_op = PL_op->op_next;
643	else	937
644	croak ("FATAL: CCTXT coroutine returned!");	938	/* inject a fake subroutine call to cctx_init */
		939	cctx_prepare (aTHX_ (coro_cctx *)arg);
		940
		941	/* somebody or something will hit me for both perl_run and PL_restartop */
		942	PL_restartop = PL_op;
		943	perl_run (PL_curinterp);
		944
		945	/*
		946	* If perl-run returns we assume exit() was being called or the coro
		947	* fell off the end, which seems to be the only valid (non-bug)
		948	* reason for perl_run to return. We try to exit by jumping to the
		949	* bootstrap-time "top" top_env, as we cannot restore the "main"
		950	* coroutine as Coro has no such concept
		951	*/
		952	PL_top_env = main_top_env;
		953	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		954	}
		955
		956	static coro_cctx *
		957	cctx_new ()
		958	{
		959	coro_cctx *cctx;
		960	void *stack_start;
		961	size_t stack_size;
		962
		963	++cctx_count;
		964
		965	Newz (0, cctx, 1, coro_cctx);
		966
		967	#if HAVE_MMAP
		968	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		969	/* mmap supposedly does allocate-on-write for us */
		970	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		971
		972	if (cctx->sptr != (void *)-1)
		973	{
		974	# if CORO_STACKGUARD
		975	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		976	# endif
		977	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		978	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		979	cctx->flags |= CC_MAPPED;
645	}	980	}
646	else	981	else
647	{	982	#endif
648	UNOP myop;
649
650	PL_op = (OP *)&myop;
651
652	Zero(&myop, 1, UNOP);
653	myop.op_next = Nullop;
654	myop.op_flags = OPf_WANT_VOID;
655
656	PUSHMARK(SP);
657	XPUSHs (sub_init);
658	/*
659	* the next line is slightly wrong, as PL_op->op_next
660	* is actually being executed so we skip the first op.
661	* that doesn't matter, though, since it is only
662	* pp_nextstate and we never return...
663	* ah yes, and I don't care anyways ;)
664	*/
665	PUTBACK;
666	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667	SPAGAIN;
668
669	ENTER; /* necessary e.g. for dounwind */
670	}	983	{
671	}	984	cctx->ssize = coro_stacksize * (long)sizeof (long);
		985	New (0, cctx->sptr, coro_stacksize, long);
672		986
673	static void	987	if (!cctx->sptr)
674	continue_coro (void *arg)	988	{
675	{	989	perror ("FATAL: unable to allocate stack for coroutine");
676	/*	990	_exit (EXIT_FAILURE);
677	* this is a _very_ stripped down perl interpreter ;)	991	}
678	*/
679	Coro__State ctx = (Coro__State)arg;
680	JMPENV coro_start_env;
681		992
682	PL_top_env = &ctx->start_env;	993	stack_start = cctx->sptr;
		994	stack_size = cctx->ssize;
		995	}
683		996
684	ctx->cursp = 0;	997	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
685	PL_op = PL_op->op_next;	998	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
686	CALLRUNOPS(aTHX);
687		999
688	abort ();	1000	return cctx;
689	}	1001	}
690		1002
691	STATIC void	1003	static void
		1004	cctx_destroy (coro_cctx *cctx)
		1005	{
		1006	if (!cctx)
		1007	return;
		1008
		1009	--cctx_count;
		1010
		1011	#if CORO_USE_VALGRIND
		1012	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1013	#endif
		1014
		1015	#if HAVE_MMAP
		1016	if (cctx->flags & CC_MAPPED)
		1017	munmap (cctx->sptr, cctx->ssize);
		1018	else
		1019	#endif
		1020	Safefree (cctx->sptr);
		1021
		1022	Safefree (cctx);
		1023	}
		1024
		1025	/* wether this cctx should be destructed */
		1026	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1027
		1028	static coro_cctx *
		1029	cctx_get (pTHX)
		1030	{
		1031	while (expect_true (cctx_first))
		1032	{
		1033	coro_cctx *cctx = cctx_first;
		1034	cctx_first = cctx->next;
		1035	--cctx_idle;
		1036
		1037	if (expect_true (!CCTX_EXPIRED (cctx)))
		1038	return cctx;
		1039
		1040	cctx_destroy (cctx);
		1041	}
		1042
		1043	return cctx_new ();
		1044	}
		1045
		1046	static void
		1047	cctx_put (coro_cctx *cctx)
		1048	{
		1049	/* free another cctx if overlimit */
		1050	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1051	{
		1052	coro_cctx *first = cctx_first;
		1053	cctx_first = first->next;
		1054	--cctx_idle;
		1055
		1056	cctx_destroy (first);
		1057	}
		1058
		1059	++cctx_idle;
		1060	cctx->next = cctx_first;
		1061	cctx_first = cctx;
		1062	}
		1063
		1064	/** coroutine switching *****************************************************/
		1065
		1066	static void
		1067	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1068	{
		1069	if (expect_true (prev != next))
		1070	{
		1071	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1072	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1073
		1074	if (expect_false (next->flags & CF_RUNNING))
		1075	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1076
		1077	if (expect_false (next->flags & CF_DESTROYED))
		1078	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1079
		1080	if (
		1081	#if PERL_VERSION_ATLEAST (5,9,0)
		1082	expect_false (PL_parser)
		1083	#else
		1084	expect_false (PL_lex_state != LEX_NOTPARSING)
		1085	#endif
		1086	)
		1087	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1088	}
		1089	}
		1090
		1091	/* always use the TRANSFER macro */
		1092	static void NOINLINE
692	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	1093	transfer (pTHX_ struct coro *prev, struct coro *next)
693	{	1094	{
694	dSTACKLEVEL;	1095	dSTACKLEVEL;
695	static struct coro *xnext;
696		1096
697	if (prev != next)	1097	/* sometimes transfer is only called to set idle_sp */
		1098	if (expect_false (!next))
		1099	{
		1100	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1101	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
698	{	1102	}
699	xnext = next;	1103	else if (expect_true (prev != next))
		1104	{
		1105	coro_cctx *prev__cctx;
700		1106
701	if (next->mainstack)	1107	if (expect_false (prev->flags & CF_NEW))
702	{	1108	{
703	SAVE (prev, flags);	1109	/* create a new empty context */
704	LOAD (next);	1110	Newz (0, prev->cctx, 1, coro_cctx);
705		1111	prev->flags &= ~CF_NEW;
706	/* mark this state as in-use */	1112	prev->flags |= CF_RUNNING;
707	next->mainstack = 0;
708	next->tmps_ix = -2;
709
710	/* stacklevel changed? if yes, grab the stack for us! */
711	if (flags & TRANSFER_SAVE_CCTXT)
712	{
713	if (!prev->stack)
714	allocate_stack (prev, 0);
715	else if (prev->cursp != stacklevel
716	&& prev->stack->usecnt > 1)
717	{
718	prev->gencnt = ++prev->stack->gencnt;
719	prev->stack->usecnt = 1;
720	}
721
722	/* has our stack been invalidated? */
723	if (next->stack && next->stack->gencnt != next->gencnt)
724	{
725	deallocate_stack (next);
726	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),
728	continue_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));
730	}
731
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	/* don't add any code here */
734	}
735
736	}	1113	}
737	else if (next->tmps_ix == -2)	1114
738	croak ("tried to transfer to running coroutine");	1115	prev->flags &= ~CF_RUNNING;
		1116	next->flags |= CF_RUNNING;
		1117
		1118	LOCK;
		1119
		1120	if (expect_false (next->flags & CF_NEW))
		1121	{
		1122	/* need to start coroutine */
		1123	next->flags &= ~CF_NEW;
		1124	/* first get rid of the old state */
		1125	save_perl (aTHX_ prev);
		1126	/* setup coroutine call */
		1127	coro_setup (aTHX_ next);
		1128	}
739	else	1129	else
740	{	1130	{
741	SAVE (prev, -1); /* first get rid of the old state */	1131	/* coroutine already started */
		1132	save_perl (aTHX_ prev);
		1133	load_perl (aTHX_ next);
		1134	}
742		1135
743	if (flags & TRANSFER_SAVE_CCTXT)	1136	prev__cctx = prev->cctx;
		1137
		1138	/* possibly "free" the cctx */
		1139	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1140	{
		1141	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1142	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1143
		1144	prev->cctx = 0;
		1145
		1146	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1147	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1148	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1149	if (!next->cctx)
		1150	next->cctx = cctx_get (aTHX);
		1151
		1152	cctx_put (prev__cctx);
		1153	}
		1154
		1155	++next->usecount;
		1156
		1157	if (expect_true (!next->cctx))
		1158	next->cctx = cctx_get (aTHX);
		1159
		1160	if (expect_false (prev__cctx != next->cctx))
		1161	{
		1162	prev__cctx->top_env = PL_top_env;
		1163	PL_top_env = next->cctx->top_env;
		1164	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1165	}
		1166
		1167	free_coro_mortal (aTHX);
		1168	UNLOCK;
		1169
		1170	if (expect_false (prev->throw || next->throw))
		1171	{
		1172	struct coro *coro = SvSTATE (coro_current);
		1173
		1174	if (coro->throw)
744	{	1175	{
745	if (!prev->stack)	1176	SV *exception = coro->throw;
746	allocate_stack (prev, 0);	1177	coro->throw = 0;
747		1178	sv_setsv (ERRSV, exception);
748	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)	1179	croak (0);
749	{
750	PL_top_env = &next->start_env;
751
752	setup_coro (next);
753
754	prev->stack->refcnt++;
755	prev->stack->usecnt++;
756	next->stack = prev->stack;
757	next->gencnt = prev->gencnt;
758	}
759	else
760	{
761	assert (!next->stack);
762	allocate_stack (next, 1);
763	coro_create (&(next->stack->cctx),
764	setup_coro, (void *)next,
765	next->stack->sptr, labs (next->stack->ssize));
766	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767	/* don't add any code here */
768	}
769	}	1180	}
770	else
771	setup_coro (next);
772	}	1181	}
773
774	/*
775	* xnext is now either prev or next, depending on wether
776	* we switched the c stack or not. that's why I use a global
777	* variable, that should become thread-specific at one point.
778	*/
779	xnext->cursp = stacklevel;
780	}
781
782	if (coro_mortal)
783	{	1182	}
784	SvREFCNT_dec (coro_mortal);	1183	}
785	coro_mortal = 0;	1184
		1185	struct transfer_args
		1186	{
		1187	struct coro *prev, *next;
		1188	};
		1189
		1190	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1191	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1192
		1193	/** high level stuff ********************************************************/
		1194
		1195	static int
		1196	coro_state_destroy (pTHX_ struct coro *coro)
		1197	{
		1198	if (coro->flags & CF_DESTROYED)
		1199	return 0;
		1200
		1201	coro->flags |= CF_DESTROYED;
		1202
		1203	if (coro->flags & CF_READY)
786	}	1204	{
787	}	1205	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1206	/* alternative: look through all ready queues and remove the coro */
		1207	LOCK;
		1208	--coro_nready;
		1209	UNLOCK;
		1210	}
		1211	else
		1212	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
788		1213
789	#define SV_CORO(sv,func) \	1214	if (coro->mainstack && coro->mainstack != main_mainstack)
790	do { \	1215	{
791	if (SvROK (sv)) \	1216	struct coro temp;
792	sv = SvRV (sv); \
793	\
794	if (SvTYPE(sv) == SVt_PVHV) \
795	{ \
796	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
797	\
798	if (!he) \
799	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800	\
801	(sv) = SvRV (HeVAL(he)); \
802	} \
803	\
804	/* must also be changed inside Coro::Cont::yield */ \
805	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
806	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807	\
808	} while(0)
809		1217
810	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1218	if (coro->flags & CF_RUNNING)
		1219	croak ("FATAL: tried to destroy currently running coroutine");
811		1220
		1221	save_perl (aTHX_ &temp);
		1222	load_perl (aTHX_ coro);
		1223
		1224	coro_destroy (aTHX_ coro);
		1225
		1226	load_perl (aTHX_ &temp);
		1227
		1228	coro->slot = 0;
		1229	}
		1230
		1231	cctx_destroy (coro->cctx);
		1232	SvREFCNT_dec (coro->args);
		1233
		1234	if (coro->next) coro->next->prev = coro->prev;
		1235	if (coro->prev) coro->prev->next = coro->next;
		1236	if (coro == coro_first) coro_first = coro->next;
		1237
		1238	return 1;
		1239	}
		1240
812	static void	1241	static int
		1242	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1243	{
		1244	struct coro *coro = (struct coro *)mg->mg_ptr;
		1245	mg->mg_ptr = 0;
		1246
		1247	coro->hv = 0;
		1248
		1249	if (--coro->refcnt < 0)
		1250	{
		1251	coro_state_destroy (aTHX_ coro);
		1252	Safefree (coro);
		1253	}
		1254
		1255	return 0;
		1256	}
		1257
		1258	static int
		1259	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1260	{
		1261	struct coro *coro = (struct coro *)mg->mg_ptr;
		1262
		1263	++coro->refcnt;
		1264
		1265	return 0;
		1266	}
		1267
		1268	static MGVTBL coro_state_vtbl = {
		1269	0, 0, 0, 0,
		1270	coro_state_free,
		1271	0,
		1272	#ifdef MGf_DUP
		1273	coro_state_dup,
		1274	#else
		1275	# define MGf_DUP 0
		1276	#endif
		1277	};
		1278
		1279	static void
		1280	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1281	{
		1282	ta->prev = SvSTATE (prev_sv);
		1283	ta->next = SvSTATE (next_sv);
		1284	TRANSFER_CHECK (*ta);
		1285	}
		1286
		1287	static void
813	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1288	api_transfer (SV *prev_sv, SV *next_sv)
814	{	1289	{
815	SV_CORO (prev, "Coro::transfer");	1290	dTHX;
816	SV_CORO (next, "Coro::transfer");	1291	struct transfer_args ta;
817		1292
818	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1293	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1294	TRANSFER (ta);
819	}	1295	}
820		1296
821	/** Coro ********************************************************************/	1297	/** Coro ********************************************************************/
822		1298
823	#define PRIO_MAX 3
824	#define PRIO_HIGH 1
825	#define PRIO_NORMAL 0
826	#define PRIO_LOW -1
827	#define PRIO_IDLE -3
828	#define PRIO_MIN -4
829
830	/* for Coro.pm */
831	static GV *coro_current, *coro_idle;
832	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
833	static int coro_nready;
834
835	static void	1299	static void
836	coro_enq (SV *sv)	1300	coro_enq (pTHX_ SV *coro_sv)
837	{	1301	{
838	if (SvTYPE (sv) == SVt_PVHV)
839	{
840	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
841	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842
843	prio = prio > PRIO_MAX ? PRIO_MAX
844	: prio < PRIO_MIN ? PRIO_MIN
845	: prio;
846
847	av_push (coro_ready [prio - PRIO_MIN], sv);	1302	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
848	coro_nready++;
849
850	return;
851	}
852
853	croak ("Coro::ready tried to enqueue something that is not a coroutine");
854	}	1303	}
855		1304
856	static SV *	1305	static SV *
857	coro_deq (int min_prio)	1306	coro_deq (pTHX_ int min_prio)
858	{	1307	{
859	int prio = PRIO_MAX - PRIO_MIN;	1308	int prio = PRIO_MAX - PRIO_MIN;
860		1309
861	min_prio -= PRIO_MIN;	1310	min_prio -= PRIO_MIN;
862	if (min_prio < 0)	1311	if (min_prio < 0)
863	min_prio = 0;	1312	min_prio = 0;
864		1313
865	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1314	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
866	if (av_len (coro_ready[prio]) >= 0)	1315	if (AvFILLp (coro_ready [prio]) >= 0)
867	{
868	coro_nready--;
869	return av_shift (coro_ready[prio]);	1316	return av_shift (coro_ready [prio]);
870	}
871		1317
872	return 0;	1318	return 0;
873	}	1319	}
874		1320
875	static void	1321	static int
876	api_ready (SV *coro)	1322	api_ready (SV *coro_sv)
877	{	1323	{
		1324	dTHX;
		1325	struct coro *coro;
		1326
878	if (SvROK (coro))	1327	if (SvROK (coro_sv))
879	coro = SvRV (coro);	1328	coro_sv = SvRV (coro_sv);
880		1329
		1330	coro = SvSTATE (coro_sv);
		1331
		1332	if (coro->flags & CF_READY)
		1333	return 0;
		1334
		1335	coro->flags |= CF_READY;
		1336
		1337	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	1338	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1339	++coro_nready;
		1340	UNLOCK;
		1341
		1342	return 1;
		1343	}
		1344
		1345	static int
		1346	api_is_ready (SV *coro_sv)
		1347	{
		1348	dTHX;
		1349	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1350	}
		1351
		1352	static void
		1353	prepare_schedule (pTHX_ struct transfer_args *ta)
		1354	{
		1355	SV *prev_sv, *next_sv;
		1356
		1357	for (;;)
		1358	{
		1359	LOCK;
		1360	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1361
		1362	/* nothing to schedule: call the idle handler */
		1363	if (expect_false (!next_sv))
		1364	{
		1365	dSP;
		1366	UNLOCK;
		1367
		1368	ENTER;
		1369	SAVETMPS;
		1370
		1371	PUSHMARK (SP);
		1372	PUTBACK;
		1373	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1374
		1375	FREETMPS;
		1376	LEAVE;
		1377	continue;
		1378	}
		1379
		1380	ta->next = SvSTATE (next_sv);
		1381
		1382	/* cannot transfer to destroyed coros, skip and look for next */
		1383	if (expect_false (ta->next->flags & CF_DESTROYED))
		1384	{
		1385	UNLOCK;
		1386	SvREFCNT_dec (next_sv);
		1387	/* coro_nready is already taken care of by destroy */
		1388	continue;
		1389	}
		1390
		1391	--coro_nready;
		1392	UNLOCK;
		1393	break;
		1394	}
		1395
		1396	/* free this only after the transfer */
		1397	prev_sv = SvRV (coro_current);
		1398	ta->prev = SvSTATE (prev_sv);
		1399	TRANSFER_CHECK (*ta);
		1400	assert (ta->next->flags & CF_READY);
		1401	ta->next->flags &= ~CF_READY;
		1402	SvRV_set (coro_current, next_sv);
		1403
		1404	LOCK;
		1405	free_coro_mortal (aTHX);
		1406	coro_mortal = prev_sv;
		1407	UNLOCK;
		1408	}
		1409
		1410	static void
		1411	prepare_cede (pTHX_ struct transfer_args *ta)
		1412	{
		1413	api_ready (coro_current);
		1414	prepare_schedule (aTHX_ ta);
		1415	}
		1416
		1417	static int
		1418	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1419	{
		1420	if (coro_nready)
		1421	{
		1422	SV *prev = SvRV (coro_current);
		1423	prepare_schedule (aTHX_ ta);
		1424	api_ready (prev);
		1425	return 1;
		1426	}
		1427	else
		1428	return 0;
882	}	1429	}
883		1430
884	static void	1431	static void
885	api_schedule (void)	1432	api_schedule (void)
886	{	1433	{
887	SV *prev, *next;	1434	dTHX;
		1435	struct transfer_args ta;
888		1436
889	prev = SvRV (GvSV (coro_current));	1437	prepare_schedule (aTHX_ &ta);
890	next = coro_deq (PRIO_MIN);	1438	TRANSFER (ta);
891
892	if (!next)
893	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
894
895	/* free this only after the transfer */
896	coro_mortal = prev;
897	SV_CORO (prev, "Coro::schedule");
898
899	SvRV (GvSV (coro_current)) = next;
900
901	SV_CORO (next, "Coro::schedule");
902
903	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
904	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
905	}	1439	}
906		1440
907	static void	1441	static int
908	api_cede (void)	1442	api_cede (void)
909	{	1443	{
910	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1444	dTHX;
		1445	struct transfer_args ta;
911		1446
912	api_schedule ();	1447	prepare_cede (aTHX_ &ta);
913	}
914		1448
		1449	if (expect_true (ta.prev != ta.next))
		1450	{
		1451	TRANSFER (ta);
		1452	return 1;
		1453	}
		1454	else
		1455	return 0;
		1456	}
		1457
		1458	static int
		1459	api_cede_notself (void)
		1460	{
		1461	dTHX;
		1462	struct transfer_args ta;
		1463
		1464	if (prepare_cede_notself (aTHX_ &ta))
		1465	{
		1466	TRANSFER (ta);
		1467	return 1;
		1468	}
		1469	else
		1470	return 0;
		1471	}
		1472
		1473	static void
		1474	api_trace (SV *coro_sv, int flags)
		1475	{
		1476	dTHX;
		1477	struct coro *coro = SvSTATE (coro_sv);
		1478
		1479	if (flags & CC_TRACE)
		1480	{
		1481	if (!coro->cctx)
		1482	coro->cctx = cctx_new ();
		1483	else if (!(coro->cctx->flags & CC_TRACE))
		1484	croak ("cannot enable tracing on coroutine with custom stack");
		1485
		1486	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1487	}
		1488	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1489	{
		1490	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1491
		1492	if (coro->flags & CF_RUNNING)
		1493	PL_runops = RUNOPS_DEFAULT;
		1494	else
		1495	coro->slot->runops = RUNOPS_DEFAULT;
		1496	}
		1497	}
		1498
915	MODULE = Coro::State PACKAGE = Coro::State	1499	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1500
917	PROTOTYPES: ENABLE	1501	PROTOTYPES: DISABLE
918		1502
919	BOOT:	1503	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1504	{
921	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1505	#ifdef USE_ITHREADS
922	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1506	MUTEX_INIT (&coro_mutex);
		1507	#endif
		1508	BOOT_PAGESIZE;
		1509
		1510	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1511	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1512
		1513	hv_sig = coro_get_hv ("SIG", TRUE);
		1514	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1515	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1516
		1517	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1518	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1519
923	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1520	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924		1521
925	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1522	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
926	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1523	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
927	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1524	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
928	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1525	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
929
930	if (!padlist_cache)
931	padlist_cache = newHV ();
932		1526
933	main_mainstack = PL_mainstack;	1527	main_mainstack = PL_mainstack;
		1528	main_top_env = PL_top_env;
		1529
		1530	while (main_top_env->je_prev)
		1531	main_top_env = main_top_env->je_prev;
934		1532
935	coroapi.ver = CORO_API_VERSION;	1533	coroapi.ver = CORO_API_VERSION;
		1534	coroapi.rev = CORO_API_REVISION;
936	coroapi.transfer = api_transfer;	1535	coroapi.transfer = api_transfer;
937	}
938		1536
939	Coro::State	1537	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
940	_newprocess(args)	1538	}
941	SV * args	1539
942	PROTOTYPE: $	1540	SV *
		1541	new (char *klass, ...)
943	CODE:	1542	CODE:
944	Coro__State coro;	1543	{
		1544	struct coro *coro;
		1545	HV *hv;
		1546	int i;
945		1547
946	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
947	croak ("Coro::State::_newprocess expects an arrayref");
948
949	Newz (0, coro, 1, struct coro);	1548	Newz (0, coro, 1, struct coro);
		1549	coro->args = newAV ();
		1550	coro->flags = CF_NEW;
950		1551
951	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1552	if (coro_first) coro_first->prev = coro;
952	coro->mainstack = 0; /* actual work is done inside transfer */	1553	coro->next = coro_first;
953	coro->stack = 0;	1554	coro_first = coro;
954		1555
955	/* same as JMPENV_BOOTSTRAP */	1556	coro->hv = hv = newHV ();
956	/* we might be able to recycle start_env, but safe is safe */	1557	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
957	//Zero(&coro->start_env, 1, JMPENV);	1558	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
958	coro->start_env.je_ret = -1;
959	coro->start_env.je_mustcatch = TRUE;
960		1559
961	RETVAL = coro;	1560	av_extend (coro->args, items - 1);
		1561	for (i = 1; i < items; i++)
		1562	av_push (coro->args, newSVsv (ST (i)));
		1563	}
962	OUTPUT:	1564	OUTPUT:
963	RETVAL	1565	RETVAL
964		1566
		1567	# these not obviously related functions are all rolled into the same xs
		1568	# function to increase chances that they all will call transfer with the same
		1569	# stack offset
965	void	1570	void
966	transfer(prev, next, flags)	1571	_set_stacklevel (...)
967	SV *prev	1572	ALIAS:
968	SV *next	1573	Coro::State::transfer = 1
969	int flags	1574	Coro::schedule = 2
970	PROTOTYPE: @	1575	Coro::cede = 3
		1576	Coro::cede_notself = 4
971	CODE:	1577	CODE:
		1578	{
		1579	struct transfer_args ta;
		1580
		1581	switch (ix)
		1582	{
		1583	case 0:
		1584	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1585	ta.next = 0;
		1586	break;
		1587
		1588	case 1:
		1589	if (items != 2)
		1590	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1591
		1592	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1593	break;
		1594
		1595	case 2:
		1596	prepare_schedule (aTHX_ &ta);
		1597	break;
		1598
		1599	case 3:
		1600	prepare_cede (aTHX_ &ta);
		1601	break;
		1602
		1603	case 4:
		1604	if (!prepare_cede_notself (aTHX_ &ta))
		1605	XSRETURN_EMPTY;
		1606
		1607	break;
		1608	}
		1609
		1610	BARRIER;
972	PUTBACK;	1611	PUTBACK;
973	SV_CORO (next, "Coro::transfer");	1612	TRANSFER (ta);
974	SV_CORO (prev, "Coro::transfer");	1613	SPAGAIN; /* might be the sp of a different coroutine now */
975	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1614	/* be extra careful not to ever do anything after TRANSFER */
976	SPAGAIN;	1615	}
		1616
		1617	bool
		1618	_destroy (SV *coro_sv)
		1619	CODE:
		1620	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1621	OUTPUT:
		1622	RETVAL
977		1623
978	void	1624	void
979	DESTROY(coro)
980	Coro::State coro
981	CODE:
982
983	if (coro->mainstack && coro->mainstack != main_mainstack)
984	{
985	struct coro temp;
986
987	PUTBACK;
988	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
989	LOAD(aTHX_ coro);
990	SPAGAIN;
991
992	destroy_stacks (aTHX);
993
994	LOAD((&temp)); /* this will get rid of defsv etc.. */
995	SPAGAIN;
996
997	coro->mainstack = 0;
998	}
999
1000	deallocate_stack (coro);
1001	SvREFCNT_dec (coro->args);
1002	Safefree (coro);
1003
1004	void
1005	_exit(code)	1625	_exit (code)
1006	int code	1626	int code
1007	PROTOTYPE: $	1627	PROTOTYPE: $
1008	CODE:	1628	CODE:
1009	_exit (code);	1629	_exit (code);
1010		1630
1011	MODULE = Coro::State PACKAGE = Coro::Cont	1631	int
		1632	cctx_stacksize (int new_stacksize = 0)
		1633	CODE:
		1634	RETVAL = coro_stacksize;
		1635	if (new_stacksize)
		1636	coro_stacksize = new_stacksize;
		1637	OUTPUT:
		1638	RETVAL
1012		1639
1013	# this is slightly dirty (should expose a c-level api)	1640	int
		1641	cctx_count ()
		1642	CODE:
		1643	RETVAL = cctx_count;
		1644	OUTPUT:
		1645	RETVAL
		1646
		1647	int
		1648	cctx_idle ()
		1649	CODE:
		1650	RETVAL = cctx_idle;
		1651	OUTPUT:
		1652	RETVAL
1014		1653
1015	void	1654	void
1016	yield(...)	1655	list ()
1017	PROTOTYPE: @	1656	PPCODE:
		1657	{
		1658	struct coro *coro;
		1659	for (coro = coro_first; coro; coro = coro->next)
		1660	if (coro->hv)
		1661	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1662	}
		1663
		1664	void
		1665	call (Coro::State coro, SV *coderef)
		1666	ALIAS:
		1667	eval = 1
		1668	CODE:
		1669	{
		1670	if (coro->mainstack)
		1671	{
		1672	struct coro temp;
		1673
		1674	if (!(coro->flags & CF_RUNNING))
		1675	{
		1676	save_perl (aTHX_ &temp);
		1677	load_perl (aTHX_ coro);
		1678	}
		1679
		1680	{
		1681	dSP;
		1682	ENTER;
		1683	SAVETMPS;
		1684	PUTBACK;
		1685	PUSHSTACK;
		1686	PUSHMARK (SP);
		1687
		1688	if (ix)
		1689	eval_sv (coderef, 0);
		1690	else
		1691	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1692
		1693	POPSTACK;
		1694	SPAGAIN;
		1695	FREETMPS;
		1696	LEAVE;
		1697	PUTBACK;
		1698	}
		1699
		1700	if (!(coro->flags & CF_RUNNING))
		1701	{
		1702	save_perl (aTHX_ coro);
		1703	load_perl (aTHX_ &temp);
		1704	}
		1705	}
		1706	}
		1707
		1708	SV *
		1709	is_ready (Coro::State coro)
		1710	PROTOTYPE: $
		1711	ALIAS:
		1712	is_ready = CF_READY
		1713	is_running = CF_RUNNING
		1714	is_new = CF_NEW
		1715	is_destroyed = CF_DESTROYED
		1716	CODE:
		1717	RETVAL = boolSV (coro->flags & ix);
		1718	OUTPUT:
		1719	RETVAL
		1720
		1721	void
		1722	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1723
		1724	SV *
		1725	has_stack (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = boolSV (!!coro->cctx);
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	int
		1733	is_traced (Coro::State coro)
		1734	PROTOTYPE: $
		1735	CODE:
		1736	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1737	OUTPUT:
		1738	RETVAL
		1739
		1740	IV
		1741	rss (Coro::State coro)
		1742	PROTOTYPE: $
		1743	ALIAS:
		1744	usecount = 1
1018	CODE:	1745	CODE:
1019	static SV *returnstk;	1746	switch (ix)
1020	SV *sv;	1747	{
1021	AV *defav = GvAV (PL_defgv);	1748	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1022	struct coro *prev, *next;	1749	case 1: RETVAL = coro->usecount; break;
		1750	}
		1751	OUTPUT:
		1752	RETVAL
1023		1753
1024	if (!returnstk)
1025	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1026
1027	/* set up @_ -- ugly */
1028	av_clear (defav);
1029	av_fill (defav, items - 1);
1030	while (items--)
1031	av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1034	sv = av_pop ((AV *)SvRV (returnstk));
1035	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1036	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1037	SvREFCNT_dec (sv);
1038
1039	transfer(aTHX_ prev, next, 0);
1040		1754
1041	MODULE = Coro::State PACKAGE = Coro	1755	MODULE = Coro::State PACKAGE = Coro
1042		1756
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1757	BOOT:
1046	{	1758	{
1047	int i;	1759	int i;
		1760
		1761	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1762	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1763	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1764
		1765	coro_current = coro_get_sv ("Coro::current", FALSE);
		1766	SvREADONLY_on (coro_current);
		1767
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1768	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1769
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1770	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1771	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1772	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1773	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1774	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1775	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059		1776
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1777	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061	coro_ready[i] = newAV ();	1778	coro_ready[i] = newAV ();
1062		1779
1063	{	1780	{
1064	SV *sv = perl_get_sv("Coro::API", 1);	1781	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1782	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1065		1783
1066	coroapi.schedule = api_schedule;	1784	coroapi.schedule = api_schedule;
1067	coroapi.cede = api_cede;	1785	coroapi.cede = api_cede;
		1786	coroapi.cede_notself = api_cede_notself;
1068	coroapi.ready = api_ready;	1787	coroapi.ready = api_ready;
		1788	coroapi.is_ready = api_is_ready;
1069	coroapi.nready = &coro_nready;	1789	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1790	coroapi.current = coro_current;
1071		1791
1072	GCoroAPI = &coroapi;	1792	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1793	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1794	SvREADONLY_on (sv);
1075	}	1795	}
1076	}	1796	}
1077		1797
1078	#if !PERL_MICRO
1079
1080	void	1798	void
1081	ready(self)	1799	_set_current (SV *current)
1082	SV * self
1083	PROTOTYPE: $	1800	PROTOTYPE: $
1084	CODE:	1801	CODE:
1085	api_ready (self);	1802	SvREFCNT_dec (SvRV (coro_current));
1086		1803	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1087	#endif
1088		1804
1089	int	1805	int
		1806	prio (Coro::State coro, int newprio = 0)
		1807	ALIAS:
		1808	nice = 1
		1809	CODE:
		1810	{
		1811	RETVAL = coro->prio;
		1812
		1813	if (items > 1)
		1814	{
		1815	if (ix)
		1816	newprio = coro->prio - newprio;
		1817
		1818	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1819	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1820
		1821	coro->prio = newprio;
		1822	}
		1823	}
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	SV *
		1828	ready (SV *self)
		1829	PROTOTYPE: $
		1830	CODE:
		1831	RETVAL = boolSV (api_ready (self));
		1832	OUTPUT:
		1833	RETVAL
		1834
		1835	int
1090	nready(...)	1836	nready (...)
1091	PROTOTYPE:	1837	PROTOTYPE:
1092	CODE:	1838	CODE:
1093	RETVAL = coro_nready;	1839	RETVAL = coro_nready;
1094	OUTPUT:	1840	OUTPUT:
1095	RETVAL	1841	RETVAL
1096		1842
1097	void	1843	void
1098	schedule(...)	1844	throw (Coro::State self, SV *throw = &PL_sv_undef)
1099	PROTOTYPE:	1845	PROTOTYPE: $;$
		1846	CODE:
		1847	SvREFCNT_dec (self->throw);
		1848	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1849
		1850	# for async_pool speedup
		1851	void
		1852	_pool_1 (SV *cb)
1100	CODE:	1853	CODE:
1101	api_schedule ();	1854	{
		1855	struct coro *coro = SvSTATE (coro_current);
		1856	HV *hv = (HV *)SvRV (coro_current);
		1857	AV *defav = GvAV (PL_defgv);
		1858	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1859	AV *invoke_av;
		1860	int i, len;
		1861
		1862	if (!invoke)
		1863	croak ("\3async_pool terminate\2\n");
		1864
		1865	SvREFCNT_dec (coro->saved_deffh);
		1866	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1867
		1868	hv_store (hv, "desc", sizeof ("desc") - 1,
		1869	newSVpvn (strpair ("[async_pool]")), 0);
		1870
		1871	invoke_av = (AV *)SvRV (invoke);
		1872	len = av_len (invoke_av);
		1873
		1874	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1875
		1876	if (len > 0)
		1877	{
		1878	av_fill (defav, len - 1);
		1879	for (i = 0; i < len; ++i)
		1880	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1881	}
		1882
		1883	SvREFCNT_dec (invoke);
		1884	}
1102		1885
1103	void	1886	void
1104	cede(...)	1887	_pool_2 (SV *cb)
1105	PROTOTYPE:
1106	CODE:	1888	CODE:
1107	api_cede ();	1889	{
		1890	struct coro *coro = SvSTATE (coro_current);
1108		1891
		1892	sv_setsv (cb, &PL_sv_undef);
		1893
		1894	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1895	coro->saved_deffh = 0;
		1896
		1897	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1898	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1899	croak ("\3async_pool terminate\2\n");
		1900
		1901	av_clear (GvAV (PL_defgv));
		1902	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1903	newSVpvn (strpair ("[async_pool idle]")), 0);
		1904
		1905	coro->prio = 0;
		1906
		1907	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1908	api_trace (coro_current, 0);
		1909
		1910	av_push (av_async_pool, newSVsv (coro_current));
		1911	}
		1912
		1913
		1914	MODULE = Coro::State PACKAGE = Coro::AIO
		1915
		1916	SV *
		1917	_get_state ()
		1918	CODE:
		1919	{
		1920	struct io_state *data;
		1921
		1922	RETVAL = newSV (sizeof (struct io_state));
		1923	data = (struct io_state *)SvPVX (RETVAL);
		1924	SvCUR_set (RETVAL, sizeof (struct io_state));
		1925	SvPOK_only (RETVAL);
		1926
		1927	data->errorno = errno;
		1928	data->laststype = PL_laststype;
		1929	data->laststatval = PL_laststatval;
		1930	data->statcache = PL_statcache;
		1931	}
		1932	OUTPUT:
		1933	RETVAL
		1934
		1935	void
		1936	_set_state (char *data_)
		1937	PROTOTYPE: $
		1938	CODE:
		1939	{
		1940	struct io_state *data = (void *)data_;
		1941
		1942	errno = data->errorno;
		1943	PL_laststype = data->laststype;
		1944	PL_laststatval = data->laststatval;
		1945	PL_statcache = data->statcache;
		1946	}
		1947

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