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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.208 by root, Wed Oct 10 00:53:18 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
		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)
8	# ifndef PL_ppaddr	56	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	57	# define PL_ppaddr ppaddr
10	# endif	58	# endif
11	# ifndef call_sv	59	# ifndef call_sv
12	# define call_sv perl_call_sv	60	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	71	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	72	# define IS_PADCONST(v) 0
25	# endif	73	# endif
26	#endif	74	#endif
27		75
28	#include "libcoro/coro.c"	76	/* 5.8.7 */
29		77	#ifndef SvRV_set
30	#include <signal.h>	78	# 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	79	#endif
42	#endif
43		80
44	#define SUB_INIT "Coro::State::initialize"	81	/* 5.8.8 */
45	#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
46		88
47	/* The next macro should declare a variable stacklevel that contains and approximation	89	#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	90	# undef CORO_STACKGUARD
49	* 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
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
51		106
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		108
54	#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))
55		123
56	#include "CoroAPI.h"	124	#include "CoroAPI.h"
57		125
58	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
59	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
60	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
61	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
62	#else	130	#else
63	# define LOCK 0	131	# define LOCK (void)0
64	# define UNLOCK 0	132	# define UNLOCK (void)0
65	#endif	133	#endif
66		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;
67	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
		148	static AV *main_mainstack; /* used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
		150	static HV *coro_state_stash, *coro_stash;
		151	static SV *coro_mortal; /* will be freed after next transfer */
68		152
69	/* 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 */
70	typedef struct {	205	typedef struct {
71	int refcnt; /* pointer reference counter */	206	SV *defsv;
72	int usecnt; /* shared by how many coroutines */	207	AV *defav;
73	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;
74		214
75	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
76		216
77	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
78	long ssize; /* positive == mmap, otherwise malloc */
79	} coro_stack;
80
81	struct coro {	218	struct coro {
82	/* the top-level JMPENV for each coroutine, needed to catch dies. */	219	/* the c coroutine allocated to this perl coroutine, if any */
83	JMPENV start_env;	220	coro_cctx *cctx;
84		221
85	/* the optional C context */	222	/* process data */
86	coro_stack *stack;
87	void *cursp;
88	int gencnt;
89
90	/* optionally saved, might be zero */
91	AV *defav;
92	SV *defsv;
93	SV *errsv;
94
95	/* saved global state not related to stacks */
96	U8 dowarn;
97	I32 in_eval;
98
99	/* the stacks and related info (callchain etc..) */
100	PERL_SI *curstackinfo;
101	AV *curstack;
102	AV *mainstack;	223	AV *mainstack;
103	SV **stack_sp;	224	perl_slots *slot; /* basically the saved sp */
104	OP *op;
105	SV **curpad;
106	AV *comppad;
107	SV **stack_base;
108	SV **stack_max;
109	SV **tmps_stack;
110	I32 tmps_floor;
111	I32 tmps_ix;
112	I32 tmps_max;
113	I32 *markstack;
114	I32 *markstack_ptr;
115	I32 *markstack_max;
116	I32 *scopestack;
117	I32 scopestack_ix;
118	I32 scopestack_max;
119	ANY *savestack;
120	I32 savestack_ix;
121	I32 savestack_max;
122	OP **retstack;
123	I32 retstack_ix;
124	I32 retstack_max;
125	COP *curcop;
126	JMPENV *top_env;
127		225
128	/* data associated with this coroutine (initial args) */	226	AV *args; /* data associated with this coroutine (initial args) */
129	AV *args;	227	int refcnt; /* coroutines are refcounted, yes */
		228	int flags; /* CF_ flags */
		229	HV *hv; /* the perl hash associated with this coro, if any */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV *throw; /* exception to be thrown */
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
130	};	243	};
131		244
132	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
133	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
134		247
135	static AV *main_mainstack; /* used to differentiate between $main and others */	248	/** Coro ********************************************************************/
136	static HV *coro_state_stash;
137	static SV *ucoro_state_sv;
138	static U32 ucoro_state_hash;
139	static SV *coro_mortal; /* will be freed after next transfer */
140		249
141	/* mostly copied from op.c:cv_clone2 */	250	#define PRIO_MAX 3
142	STATIC AV *	251	#define PRIO_HIGH 1
143	clone_padlist (AV *protopadlist)	252	#define PRIO_NORMAL 0
		253	#define PRIO_LOW -1
		254	#define PRIO_IDLE -3
		255	#define PRIO_MIN -4
		256
		257	/* for Coro.pm */
		258	static SV *coro_current;
		259	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		260	static int coro_nready;
		261	static struct coro *coro_first;
		262
		263	/** lowlevel stuff **********************************************************/
		264
		265	static SV *
		266	coro_get_sv (const char *name, int create)
144	{	267	{
145	AV *av;	268	#if PERL_VERSION_ATLEAST (5,9,0)
146	I32 ix;	269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
147	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	270	get_sv (name, create);
148	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	271	#endif
149	SV **pname = AvARRAY (protopad_name);	272	return get_sv (name, create);
150	SV **ppad = AvARRAY (protopad);	273	}
151	I32 fname = AvFILLp (protopad_name);	274
152	I32 fpad = AvFILLp (protopad);	275	static AV *
		276	coro_get_av (const char *name, int create)
		277	{
		278	#if PERL_VERSION_ATLEAST (5,9,0)
		279	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		280	get_av (name, create);
		281	#endif
		282	return get_av (name, create);
		283	}
		284
		285	static HV *
		286	coro_get_hv (const char *name, int create)
		287	{
		288	#if PERL_VERSION_ATLEAST (5,9,0)
		289	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		290	get_hv (name, create);
		291	#endif
		292	return get_hv (name, create);
		293	}
		294
		295	static AV *
		296	coro_clone_padlist (pTHX_ CV *cv)
		297	{
		298	AV *padlist = CvPADLIST (cv);
153	AV *newpadlist, *newpad_name, *newpad;	299	AV *newpadlist, *newpad;
154	SV **npad;
155
156	newpad_name = newAV ();
157	for (ix = fname; ix >= 0; ix--)
158	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
159
160	newpad = newAV ();
161	av_fill (newpad, AvFILLp (protopad));
162	npad = AvARRAY (newpad);
163		300
164	newpadlist = newAV ();	301	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	302	AvREAL_off (newpadlist);
166	av_store (newpadlist, 0, (SV *) newpad_name);	303	#if PERL_VERSION_ATLEAST (5,9,0)
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		305	#else
		306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		307	#endif
		308	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		309	--AvFILLp (padlist);
		310
		311	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
167	av_store (newpadlist, 1, (SV *) newpad);	312	av_store (newpadlist, 1, (SV *)newpad);
168
169	av = newAV (); /* will be @_ */
170	av_extend (av, 0);
171	av_store (newpad, 0, (SV *) av);
172	AvFLAGS (av) = AVf_REIFY;
173
174	for (ix = fpad; ix > 0; ix--)
175	{
176	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
177
178	if (namesv && namesv != &PL_sv_undef)
179	{
180	char *name = SvPVX (namesv); /* XXX */
181
182	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
183	{ /* lexical from outside? */
184	npad[ix] = SvREFCNT_inc (ppad[ix]);
185	}
186	else
187	{ /* our own lexical */
188	SV *sv;
189	if (*name == '&')
190	sv = SvREFCNT_inc (ppad[ix]);
191	else if (*name == '@')
192	sv = (SV *) newAV ();
193	else if (*name == '%')
194	sv = (SV *) newHV ();
195	else
196	sv = NEWSV (0, 0);
197
198	#ifdef SvPADBUSY
199	if (!SvPADBUSY (sv))
200	#endif
201	SvPADMY_on (sv);
202
203	npad[ix] = sv;
204	}
205	}
206	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
207	{
208	npad[ix] = SvREFCNT_inc (ppad[ix]);
209	}
210	else
211	{
212	SV *sv = NEWSV (0, 0);
213	SvPADTMP_on (sv);
214	npad[ix] = sv;
215	}
216	}
217
218	#if 0 /* return -ENOTUNDERSTOOD */
219	/* Now that vars are all in place, clone nested closures. */
220
221	for (ix = fpad; ix > 0; ix--) {
222	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
223	if (namesv
224	&& namesv != &PL_sv_undef
225	&& !(SvFLAGS(namesv) & SVf_FAKE)
226	&& *SvPVX(namesv) == '&'
227	&& CvCLONE(ppad[ix]))
228	{
229	CV *kid = cv_clone((CV*)ppad[ix]);
230	SvREFCNT_dec(ppad[ix]);
231	CvCLONE_on(kid);
232	SvPADMY_on(kid);
233	npad[ix] = (SV*)kid;
234	}
235	}
236	#endif
237		313
238	return newpadlist;	314	return newpadlist;
239	}	315	}
240		316
241	STATIC void	317	static void
242	free_padlist (AV *padlist)	318	free_padlist (pTHX_ AV *padlist)
243	{	319	{
244	/* may be during global destruction */	320	/* may be during global destruction */
245	if (SvREFCNT (padlist))	321	if (SvREFCNT (padlist))
246	{	322	{
247	I32 i = AvFILLp (padlist);	323	I32 i = AvFILLp (padlist);
…		…
260		336
261	SvREFCNT_dec ((SV*)padlist);	337	SvREFCNT_dec ((SV*)padlist);
262	}	338	}
263	}	339	}
264		340
265	STATIC int	341	static int
266	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	342	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267	{	343	{
268	AV *padlist;	344	AV *padlist;
269	AV *av = (AV *)mg->mg_obj;	345	AV *av = (AV *)mg->mg_obj;
270		346
271	/* casting is fun. */	347	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	348	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (padlist);	349	free_padlist (aTHX_ padlist);
		350
		351	SvREFCNT_dec (av);
		352
		353	return 0;
274	}	354	}
275		355
276	#define PERL_MAGIC_coro PERL_MAGIC_ext	356	#define PERL_MAGIC_coro PERL_MAGIC_ext
277		357
278	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	358	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
279		359
		360	#define CORO_MAGIC(cv) \
		361	SvMAGIC (cv) \
		362	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		363	? SvMAGIC (cv) \
		364	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		365	: 0
		366
		367	static struct coro *
		368	SvSTATE_ (pTHX_ SV *coro)
		369	{
		370	HV *stash;
		371	MAGIC *mg;
		372
		373	if (SvROK (coro))
		374	coro = SvRV (coro);
		375
		376	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		377	croak ("Coro::State object required");
		378
		379	stash = SvSTASH (coro);
		380	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		381	{
		382	/* very slow, but rare, check */
		383	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		384	croak ("Coro::State object required");
		385	}
		386
		387	mg = CORO_MAGIC (coro);
		388	return (struct coro *)mg->mg_ptr;
		389	}
		390
		391	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		392
280	/* the next two functions merely cache the padlists */	393	/* the next two functions merely cache the padlists */
281	STATIC void	394	static void
282	get_padlist (CV *cv)	395	get_padlist (pTHX_ CV *cv)
283	{	396	{
284	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	397	MAGIC *mg = CORO_MAGIC (cv);
		398	AV *av;
285		399
286	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
287	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288	else	402	else
		403	{
		404	#if CORO_PREFER_PERL_FUNCTIONS
		405	/* this is probably cleaner, but also slower? */
		406	CV *cp = Perl_cv_clone (cv);
		407	CvPADLIST (cv) = CvPADLIST (cp);
		408	CvPADLIST (cp) = 0;
		409	SvREFCNT_dec (cp);
		410	#else
289	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		412	#endif
		413	}
290	}	414	}
291		415
292	STATIC void	416	static void
293	put_padlist (CV *cv)	417	put_padlist (pTHX_ CV *cv)
294	{	418	{
295	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	419	MAGIC *mg = CORO_MAGIC (cv);
		420	AV *av;
296		421
297	if (!mg)	422	if (expect_false (!mg))
298	{	423	{
299	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
300	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301	mg->mg_virtual = &vtbl_coro;	426	mg->mg_virtual = &vtbl_coro;
302	mg->mg_obj = (SV *)newAV ();	427	mg->mg_obj = (SV *)newAV ();
303	}	428	}
304		429
305	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	430	av = (AV *)mg->mg_obj;
306	}
307		431
308	#define SB do {	432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
309	#define SE } while (0)	433	av_extend (av, AvMAX (av) + 1);
310		434
311	#define LOAD(state) load_state(aTHX_ (state));	435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
312	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	436	}
313		437
314	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	438	/** load & save, init *******************************************************/
315		439
316	static void	440	static void
317	load_state(pTHX_ Coro__State c)	441	load_perl (pTHX_ Coro__State c)
318	{	442	{
319	PL_dowarn = c->dowarn;	443	perl_slots *slot = c->slot;
320	PL_in_eval = c->in_eval;	444	c->slot = 0;
321		445
322	PL_curstackinfo = c->curstackinfo;
323	PL_curstack = c->curstack;
324	PL_mainstack = c->mainstack;	446	PL_mainstack = c->mainstack;
325	PL_stack_sp = c->stack_sp;
326	PL_op = c->op;
327	PL_curpad = c->curpad;
328	PL_comppad = c->comppad;
329	PL_stack_base = c->stack_base;
330	PL_stack_max = c->stack_max;
331	PL_tmps_stack = c->tmps_stack;
332	PL_tmps_floor = c->tmps_floor;
333	PL_tmps_ix = c->tmps_ix;
334	PL_tmps_max = c->tmps_max;
335	PL_markstack = c->markstack;
336	PL_markstack_ptr = c->markstack_ptr;
337	PL_markstack_max = c->markstack_max;
338	PL_scopestack = c->scopestack;
339	PL_scopestack_ix = c->scopestack_ix;
340	PL_scopestack_max = c->scopestack_max;
341	PL_savestack = c->savestack;
342	PL_savestack_ix = c->savestack_ix;
343	PL_savestack_max = c->savestack_max;
344	PL_retstack = c->retstack;
345	PL_retstack_ix = c->retstack_ix;
346	PL_retstack_max = c->retstack_max;
347	PL_curcop = c->curcop;
348	PL_top_env = c->top_env;
349		447
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	448	GvSV (PL_defgv) = slot->defsv;
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	449	GvAV (PL_defgv) = slot->defav;
352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	450	GvSV (PL_errgv) = slot->errsv;
		451	GvSV (irsgv) = slot->irsgv;
		452
		453	#define VAR(name,type) PL_ ## name = slot->name;
		454	# include "state.h"
		455	#undef VAR
		456
		457	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
		458	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
353		459
354	{	460	{
355	dSP;	461	dSP;
		462
356	CV *cv;	463	CV *cv;
357		464
358	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
359	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
360	{	467	{
361	AV *padlist = (AV *)POPs;
362
363	if (padlist)
364	{
365	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
366	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
367	}	470	CvPADLIST (cv) = (AV *)POPs;
368
369	++CvDEPTH(cv);
370	}	471	}
371		472
372	PUTBACK;	473	PUTBACK;
373	}	474	}
374	}	475	}
375		476
376	static void	477	static void
377	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
378	{	479	{
379	{	480	{
380	dSP;	481	dSP;
381	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
385	/*	486	/*
386	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
387	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
388	*/	489	*/
389		490
390	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
391	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
392	for (;;)	493	for (;;)
393	{	494	{
394	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
395	{	496	{
396	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
397		498
398	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
399	{	500	{
400	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
401	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
402	{	504	{
403	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
404
405	while (--CvDEPTH(cv))
406	{
407	/* this tells the restore code to increment CvDEPTH */
408	PUSHs (Nullsv);
409	PUSHs ((SV *)cv);
410	}
411
412	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
413	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
414		509
415	get_padlist (cv); /* this is a monster */	510	CvDEPTH (cv) = 0;
		511	get_padlist (aTHX_ cv);
416	}	512	}
417	}	513	}
418	#ifdef CXt_FORMAT
419	else if (CxTYPE(cx) == CXt_FORMAT)
420	{
421	/* I never used formats, so how should I know how these are implemented? */
422	/* my bold guess is as a simple, plain sub... */
423	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
424	}
425	#endif
426	}	514	}
427		515
428	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
429	break;	517	break;
430		518
431	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
432	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
433	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
434	}	522	}
435		523
436	PUTBACK;	524	PUTBACK;
437	}	525	}
438		526
439	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
440	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
441	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
442		538
443	c->dowarn = PL_dowarn;
444	c->in_eval = PL_in_eval;
445
446	c->curstackinfo = PL_curstackinfo;
447	c->curstack = PL_curstack;
448	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
449	c->stack_sp = PL_stack_sp;	540
450	c->op = PL_op;	541	{
451	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
452	c->comppad = PL_comppad;	543
453	c->stack_base = PL_stack_base;	544	slot->defav = GvAV (PL_defgv);
454	c->stack_max = PL_stack_max;	545	slot->defsv = DEFSV;
455	c->tmps_stack = PL_tmps_stack;	546	slot->errsv = ERRSV;
456	c->tmps_floor = PL_tmps_floor;	547	slot->irsgv = GvSV (irsgv);
457	c->tmps_ix = PL_tmps_ix;	548
458	c->tmps_max = PL_tmps_max;	549	#define VAR(name,type) slot->name = PL_ ## name;
459	c->markstack = PL_markstack;	550	# include "state.h"
460	c->markstack_ptr = PL_markstack_ptr;	551	#undef VAR
461	c->markstack_max = PL_markstack_max;	552	}
462	c->scopestack = PL_scopestack;
463	c->scopestack_ix = PL_scopestack_ix;
464	c->scopestack_max = PL_scopestack_max;
465	c->savestack = PL_savestack;
466	c->savestack_ix = PL_savestack_ix;
467	c->savestack_max = PL_savestack_max;
468	c->retstack = PL_retstack;
469	c->retstack_ix = PL_retstack_ix;
470	c->retstack_max = PL_retstack_max;
471	c->curcop = PL_curcop;
472	c->top_env = PL_top_env;
473	}	553	}
474		554
475	/*	555	/*
476	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
477	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
478	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
479	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
480	*/	560	*/
481	STATIC void	561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
		564	static void
482	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
483	{	566	{
484	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
485
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		571
491	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		575
495	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
496	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	579	PL_tmps_max = 32;
499		580
500	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
501	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
503		584
504	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
506	#endif	587	#endif
507		588
508	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
509	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
511		592
512	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
513	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	595	PL_savestack_max = 24;
515		596
		597	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
517	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	600	PL_retstack_max = 4;
519		601	#endif
520	UNLOCK;
521	}	602	}
		603	#endif
522		604
523	/*	605	/*
524	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
525	*/	607	*/
526	STATIC void	608	static void
527	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
528	{	610	{
529	if (!IN_DESTRUCT)
530	{
531	/* is this ugly, I ask? */
532	LEAVE_SCOPE (0);
533
534	/* sure it is, but more important: is it correct?? :/ */
535	FREETMPS;
536	}
537
538	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
540		613
541	while (PL_curstackinfo)	614	while (PL_curstackinfo)
542	{	615	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
544		617
545	{
546	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */
549	}
550
551	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
552	{
553	dounwind(-1);
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}
556		620
557	Safefree(PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	622	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	623	PL_curstackinfo = p;
560	}	624	}
561		625
562	Safefree(PL_tmps_stack);	626	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	627	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	628	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	629	Safefree (PL_savestack);
		630	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	631	Safefree (PL_retstack);
567	}
568
569	static void
570	allocate_stack (Coro__State ctx, int alloc)
571	{
572	coro_stack *stack;
573
574	New (0, stack, 1, coro_stack);
575
576	stack->refcnt = 1;
577	stack->usecnt = 1;
578	stack->gencnt = ctx->gencnt = 0;
579
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif	632	#endif
		633	}
		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
587	{	646	{
588	/*FIXME*//*D*//* reasonable stack size! */	647	slot = &tmp_slot;
589	stack->ssize = - (8192 * sizeof (long));	648
590	New (0, stack->sptr, 8192, long);	649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
591	}	652	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}
598
599	static void
600	deallocate_stack (Coro__State ctx)
601	{
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else	653	else
614	#endif	654	slot = coro->slot;
615	Safefree (stack->sptr);
616		655
617	Safefree (stack);	656	rss += sizeof (slot->curstackinfo);
618	}	657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
619	else if (ctx->gencnt == stack->gencnt)	658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
620	--stack->usecnt;	659	rss += slot->tmps_max * sizeof (SV *);
621	}	660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
622	}	661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
623		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
624	static void	674	static void
625	setup_coro (void *arg)	675	coro_setup (pTHX_ struct coro *coro)
626	{	676	{
627	/*	677	/*
628	* emulate part of the perl startup here.	678	* emulate part of the perl startup here.
629	*/	679	*/
		680	coro_init_stacks (aTHX);
		681
		682	PL_runops = RUNOPS_DEFAULT;
		683	PL_curcop = &PL_compiling;
		684	PL_in_eval = EVAL_NULL;
		685	PL_comppad = 0;
		686	PL_curpm = 0;
		687	PL_curpad = 0;
		688	PL_localizing = 0;
		689	PL_dirty = 0;
		690	PL_restartop = 0;
		691	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		692	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		693
		694	GvSV (PL_defgv) = newSV (0);
		695	GvAV (PL_defgv) = coro->args; coro->args = 0;
		696	GvSV (PL_errgv) = newSV (0);
		697	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		698	PL_rs = newSVsv (GvSV (irsgv));
		699	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		700
		701	{
		702	dSP;
		703	LOGOP myop;
		704
		705	Zero (&myop, 1, LOGOP);
		706	myop.op_next = Nullop;
		707	myop.op_flags = OPf_WANT_VOID;
		708
		709	PUSHMARK (SP);
		710	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		711	PUTBACK;
		712	PL_op = (OP *)&myop;
		713	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		714	SPAGAIN;
		715	}
		716
		717	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		718	}
		719
		720	static void
		721	coro_destroy (pTHX_ struct coro *coro)
		722	{
		723	if (!IN_DESTRUCT)
		724	{
		725	/* restore all saved variables and stuff */
		726	LEAVE_SCOPE (0);
		727	assert (PL_tmps_floor == -1);
		728
		729	/* free all temporaries */
		730	FREETMPS;
		731	assert (PL_tmps_ix == -1);
		732
		733	/* unwind all extra stacks */
		734	POPSTACK_TO (PL_mainstack);
		735
		736	/* unwind main stack */
		737	dounwind (-1);
		738	}
		739
		740	SvREFCNT_dec (GvSV (PL_defgv));
		741	SvREFCNT_dec (GvAV (PL_defgv));
		742	SvREFCNT_dec (GvSV (PL_errgv));
		743	SvREFCNT_dec (PL_defoutgv);
		744	SvREFCNT_dec (PL_rs);
		745	SvREFCNT_dec (GvSV (irsgv));
		746
		747	SvREFCNT_dec (PL_diehook);
		748	SvREFCNT_dec (PL_warnhook);
		749
		750	SvREFCNT_dec (coro->saved_deffh);
		751	SvREFCNT_dec (coro->throw);
		752
		753	coro_destroy_stacks (aTHX);
		754	}
		755
		756	static void
		757	free_coro_mortal (pTHX)
		758	{
		759	if (expect_true (coro_mortal))
		760	{
		761	SvREFCNT_dec (coro_mortal);
		762	coro_mortal = 0;
		763	}
		764	}
		765
		766	static int
		767	runops_trace (pTHX)
		768	{
		769	COP *oldcop = 0;
		770	int oldcxix = -2;
		771	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		772	coro_cctx *cctx = coro->cctx;
		773
		774	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		775	{
		776	PERL_ASYNC_CHECK ();
		777
		778	if (cctx->flags & CC_TRACE_ALL)
		779	{
		780	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		781	{
		782	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		783	SV **bot, **top;
		784	AV *av = newAV (); /* return values */
		785	SV **cb;
		786	dSP;
		787
		788	GV *gv = CvGV (cx->blk_sub.cv);
		789	SV *fullname = sv_2mortal (newSV (0));
		790	if (isGV (gv))
		791	gv_efullname3 (fullname, gv, 0);
		792
		793	bot = PL_stack_base + cx->blk_oldsp + 1;
		794	top = cx->blk_gimme == G_ARRAY ? SP + 1
		795	: cx->blk_gimme == G_SCALAR ? bot + 1
		796	: bot;
		797
		798	av_extend (av, top - bot);
		799	while (bot < top)
		800	av_push (av, SvREFCNT_inc (*bot++));
		801
		802	PL_runops = RUNOPS_DEFAULT;
		803	ENTER;
		804	SAVETMPS;
		805	EXTEND (SP, 3);
		806	PUSHMARK (SP);
		807	PUSHs (&PL_sv_no);
		808	PUSHs (fullname);
		809	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		810	PUTBACK;
		811	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		812	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		813	SPAGAIN;
		814	FREETMPS;
		815	LEAVE;
		816	PL_runops = runops_trace;
		817	}
		818
		819	if (oldcop != PL_curcop)
		820	{
		821	oldcop = PL_curcop;
		822
		823	if (PL_curcop != &PL_compiling)
		824	{
		825	SV **cb;
		826
		827	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		828	{
		829	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		830
		831	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		832	{
		833	runops_proc_t old_runops = PL_runops;
		834	dSP;
		835	GV *gv = CvGV (cx->blk_sub.cv);
		836	SV *fullname = sv_2mortal (newSV (0));
		837
		838	if (isGV (gv))
		839	gv_efullname3 (fullname, gv, 0);
		840
		841	PL_runops = RUNOPS_DEFAULT;
		842	ENTER;
		843	SAVETMPS;
		844	EXTEND (SP, 3);
		845	PUSHMARK (SP);
		846	PUSHs (&PL_sv_yes);
		847	PUSHs (fullname);
		848	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		849	PUTBACK;
		850	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		851	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		852	SPAGAIN;
		853	FREETMPS;
		854	LEAVE;
		855	PL_runops = runops_trace;
		856	}
		857
		858	oldcxix = cxstack_ix;
		859	}
		860
		861	if (cctx->flags & CC_TRACE_LINE)
		862	{
		863	dSP;
		864
		865	PL_runops = RUNOPS_DEFAULT;
		866	ENTER;
		867	SAVETMPS;
		868	EXTEND (SP, 3);
		869	PL_runops = RUNOPS_DEFAULT;
		870	PUSHMARK (SP);
		871	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		872	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		873	PUTBACK;
		874	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		875	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		876	SPAGAIN;
		877	FREETMPS;
		878	LEAVE;
		879	PL_runops = runops_trace;
		880	}
		881	}
		882	}
		883	}
		884	}
		885
		886	TAINT_NOT;
		887	return 0;
		888	}
		889
		890	/* inject a fake call to Coro::State::_cctx_init into the execution */
		891	/* _cctx_init should be careful, as it could be called at almost any time */
		892	/* during execution of a perl program */
		893	static void NOINLINE
		894	cctx_prepare (pTHX_ coro_cctx *cctx)
		895	{
630	dSP;	896	dSP;
631	Coro__State ctx = (Coro__State)arg;	897	LOGOP myop;
632	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
633		898
634	coro_init_stacks (aTHX);	899	PL_top_env = &PL_start_env;
635	/*PL_curcop = 0;*/
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */
637	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
639		900
		901	if (cctx->flags & CC_TRACE)
		902	PL_runops = runops_trace;
		903
		904	Zero (&myop, 1, LOGOP);
		905	myop.op_next = PL_op;
		906	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		907
		908	PUSHMARK (SP);
		909	EXTEND (SP, 2);
		910	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		911	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		912	PUTBACK;
		913	PL_op = (OP *)&myop;
		914	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640	SPAGAIN;	915	SPAGAIN;
		916	}
641		917
642	if (ctx->stack)	918	/*
643	{	919	* this is a _very_ stripped down perl interpreter ;)
644	ctx->cursp = 0;	920	*/
		921	static void
		922	cctx_run (void *arg)
		923	{
		924	dTHX;
645		925
646	PUSHMARK(SP);	926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
647	PUTBACK;	927	UNLOCK;
648	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649		928
650	if (SvTRUE (ERRSV))	929	/* we now skip the entersub that lead to transfer() */
651	croak (NULL);	930	PL_op = PL_op->op_next;
652	else	931
653	croak ("FATAL: CCTXT coroutine returned!");	932	/* inject a fake subroutine call to cctx_init */
		933	cctx_prepare (aTHX_ (coro_cctx *)arg);
		934
		935	/* somebody or something will hit me for both perl_run and PL_restartop */
		936	PL_restartop = PL_op;
		937	perl_run (PL_curinterp);
		938
		939	/*
		940	* If perl-run returns we assume exit() was being called or the coro
		941	* fell off the end, which seems to be the only valid (non-bug)
		942	* reason for perl_run to return. We try to exit by jumping to the
		943	* bootstrap-time "top" top_env, as we cannot restore the "main"
		944	* coroutine as Coro has no such concept
		945	*/
		946	PL_top_env = main_top_env;
		947	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		948	}
		949
		950	static coro_cctx *
		951	cctx_new ()
		952	{
		953	coro_cctx *cctx;
		954	void *stack_start;
		955	size_t stack_size;
		956
		957	++cctx_count;
		958
		959	Newz (0, cctx, 1, coro_cctx);
		960
		961	#if HAVE_MMAP
		962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		963	/* mmap supposedly does allocate-on-write for us */
		964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		965
		966	if (cctx->sptr != (void *)-1)
		967	{
		968	# if CORO_STACKGUARD
		969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags |= CC_MAPPED;
654	}	974	}
655	else	975	else
656	{	976	#endif
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);
662	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;
664
665	PUSHMARK(SP);
666	XPUSHs (sub_init);
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;
677
678	ENTER; /* necessary e.g. for dounwind */
679	}	977	{
680	}	978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
681		980
682	static void	981	if (!cctx->sptr)
683	continue_coro (void *arg)	982	{
684	{	983	perror ("FATAL: unable to allocate stack for coroutine");
685	/*	984	_exit (EXIT_FAILURE);
686	* this is a _very_ stripped down perl interpreter ;)	985	}
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690		986
691	PL_top_env = &ctx->start_env;	987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
692		990
693	ctx->cursp = 0;	991	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
694	PL_op = PL_op->op_next;	992	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
695	CALLRUNOPS(aTHX);
696		993
697	abort ();	994	return cctx;
698	}	995	}
699		996
700	STATIC void	997	static void
		998	cctx_destroy (coro_cctx *cctx)
		999	{
		1000	if (!cctx)
		1001	return;
		1002
		1003	--cctx_count;
		1004
		1005	#if CORO_USE_VALGRIND
		1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1007	#endif
		1008
		1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
		1011	munmap (cctx->sptr, cctx->ssize);
		1012	else
		1013	#endif
		1014	Safefree (cctx->sptr);
		1015
		1016	Safefree (cctx);
		1017	}
		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1021
		1022	static coro_cctx *
		1023	cctx_get (pTHX)
		1024	{
		1025	while (expect_true (cctx_first))
		1026	{
		1027	coro_cctx *cctx = cctx_first;
		1028	cctx_first = cctx->next;
		1029	--cctx_idle;
		1030
		1031	if (expect_true (!CCTX_EXPIRED (cctx)))
		1032	return cctx;
		1033
		1034	cctx_destroy (cctx);
		1035	}
		1036
		1037	return cctx_new ();
		1038	}
		1039
		1040	static void
		1041	cctx_put (coro_cctx *cctx)
		1042	{
		1043	/* free another cctx if overlimit */
		1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1045	{
		1046	coro_cctx *first = cctx_first;
		1047	cctx_first = first->next;
		1048	--cctx_idle;
		1049
		1050	cctx_destroy (first);
		1051	}
		1052
		1053	++cctx_idle;
		1054	cctx->next = cctx_first;
		1055	cctx_first = cctx;
		1056	}
		1057
		1058	/** coroutine switching *****************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
		1077	#else
		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
		1079	#endif
		1080	)
		1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1082	}
		1083	}
		1084
		1085	/* always use the TRANSFER macro */
		1086	static void NOINLINE
701	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	1087	transfer (pTHX_ struct coro *prev, struct coro *next)
702	{	1088	{
703	dSTACKLEVEL;	1089	dSTACKLEVEL;
704		1090
705	if (prev != next)	1091	/* sometimes transfer is only called to set idle_sp */
		1092	if (expect_false (!next))
		1093	{
		1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1095	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
706	{	1096	}
707	if (next->mainstack)	1097	else if (expect_true (prev != next))
		1098	{
		1099	coro_cctx *prev__cctx;
		1100
		1101	if (expect_false (prev->flags & CF_NEW))
708	{	1102	{
709	LOCK;	1103	/* create a new empty context */
710	SAVE (prev, flags);	1104	Newz (0, prev->cctx, 1, coro_cctx);
711	LOAD (next);	1105	prev->flags &= ~CF_NEW;
712	UNLOCK;	1106	prev->flags |= CF_RUNNING;
713
714	/* mark this state as in-use */
715	next->mainstack = 0;
716	next->tmps_ix = -2;
717
718	/* stacklevel changed? if yes, grab the stack for us! */
719	if (flags & TRANSFER_SAVE_CCTXT)
720	{
721	if (!prev->stack)
722	allocate_stack (prev, 0);
723	else if (prev->cursp != stacklevel
724	&& prev->stack->usecnt > 1)
725	{
726	prev->gencnt = ++prev->stack->gencnt;
727	prev->stack->usecnt = 1;
728	}
729
730	/* has our stack been invalidated? */
731	if (next->stack && next->stack->gencnt != next->gencnt)
732	{
733	deallocate_stack (next);
734	allocate_stack (next, 1);
735	coro_create (&(next->stack->cctx),
736	continue_coro, (void *)next,
737	next->stack->sptr, labs (next->stack->ssize));
738	}
739
740	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741	prev->cursp = stacklevel;
742	/* don't add any code here */
743	}
744	else
745	next->cursp = stacklevel;
746	}	1107	}
747	else if (next->tmps_ix == -2)	1108
748	croak ("tried to transfer to running coroutine");	1109	prev->flags &= ~CF_RUNNING;
		1110	next->flags |= CF_RUNNING;
		1111
		1112	LOCK;
		1113
		1114	if (expect_false (next->flags & CF_NEW))
		1115	{
		1116	/* need to start coroutine */
		1117	next->flags &= ~CF_NEW;
		1118	/* first get rid of the old state */
		1119	save_perl (aTHX_ prev);
		1120	/* setup coroutine call */
		1121	coro_setup (aTHX_ next);
		1122	}
749	else	1123	else
750	{	1124	{
751	LOCK;	1125	/* coroutine already started */
752	SAVE (prev, -1); /* first get rid of the old state */	1126	save_perl (aTHX_ prev);
		1127	load_perl (aTHX_ next);
		1128	}
		1129
		1130	prev__cctx = prev->cctx;
		1131
		1132	/* possibly "free" the cctx */
		1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1134	{
		1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1137
		1138	prev->cctx = 0;
		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	if (!next->cctx)
		1144	next->cctx = cctx_get (aTHX);
		1145
		1146	cctx_put (prev__cctx);
		1147	}
		1148
		1149	++next->usecount;
		1150
		1151	if (expect_true (!next->cctx))
		1152	next->cctx = cctx_get (aTHX);
		1153
		1154	if (expect_false (prev__cctx != next->cctx))
		1155	{
		1156	prev__cctx->top_env = PL_top_env;
		1157	PL_top_env = next->cctx->top_env;
		1158	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1159	}
		1160
		1161	free_coro_mortal (aTHX);
753	UNLOCK;	1162	UNLOCK;
754		1163
755	if (flags & TRANSFER_SAVE_CCTXT)	1164	if (expect_false (prev->throw || next->throw))
		1165	{
		1166	struct coro *coro = SvSTATE (coro_current);
		1167
		1168	if (coro->throw)
756	{	1169	{
757	if (!prev->stack)	1170	SV *exception = coro->throw;
758	allocate_stack (prev, 0);	1171	coro->throw = 0;
759		1172	sv_setsv (ERRSV, exception);
760	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
761	{
762	PL_top_env = &next->start_env;
763
764	setup_coro (next);
765	next->cursp = stacklevel;
766
767	prev->stack->refcnt++;
768	prev->stack->usecnt++;
769	next->stack = prev->stack;
770	next->gencnt = prev->gencnt;
771	}
772	else
773	{
774	assert (!next->stack);
775	allocate_stack (next, 1);
776	coro_create (&(next->stack->cctx),
777	setup_coro, (void *)next,
778	next->stack->sptr, labs (next->stack->ssize));
779	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
780	prev->cursp = stacklevel;
781	/* don't add any code here */
782	}
783	}
784	else
785	{
786	setup_coro (next);	1173	croak (0);
787	next->cursp = stacklevel;
788	}	1174	}
789	}	1175	}
790	}	1176	}
		1177	}
791		1178
792	LOCK;	1179	struct transfer_args
793	if (coro_mortal)	1180	{
794	{	1181	struct coro *prev, *next;
795	SvREFCNT_dec (coro_mortal);	1182	};
796	coro_mortal = 0;	1183
		1184	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1185	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1186
		1187	/** high level stuff ********************************************************/
		1188
		1189	static int
		1190	coro_state_destroy (pTHX_ struct coro *coro)
		1191	{
		1192	if (coro->flags & CF_DESTROYED)
		1193	return 0;
		1194
		1195	coro->flags |= CF_DESTROYED;
		1196
		1197	if (coro->flags & CF_READY)
797	}	1198	{
		1199	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1200	/* alternative: look through all ready queues and remove the coro */
		1201	LOCK;
		1202	--coro_nready;
798	UNLOCK;	1203	UNLOCK;
799	}	1204	}
		1205	else
		1206	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
800		1207
801	#define SV_CORO(sv,func) \	1208	if (coro->mainstack && coro->mainstack != main_mainstack)
802	do { \	1209	{
803	if (SvROK (sv)) \	1210	struct coro temp;
804	sv = SvRV (sv); \
805	\
806	if (SvTYPE (sv) == SVt_PVHV) \
807	{ \
808	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
809	\
810	if (!he) \
811	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
812	\
813	(sv) = SvRV (HeVAL(he)); \
814	} \
815	\
816	/* must also be changed inside Coro::Cont::yield */ \
817	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
818	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
819	\
820	} while(0)
821		1211
822	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1212	if (coro->flags & CF_RUNNING)
		1213	croak ("FATAL: tried to destroy currently running coroutine");
823		1214
		1215	save_perl (aTHX_ &temp);
		1216	load_perl (aTHX_ coro);
		1217
		1218	coro_destroy (aTHX_ coro);
		1219
		1220	load_perl (aTHX_ &temp);
		1221
		1222	coro->slot = 0;
		1223	}
		1224
		1225	cctx_destroy (coro->cctx);
		1226	SvREFCNT_dec (coro->args);
		1227
		1228	if (coro->next) coro->next->prev = coro->prev;
		1229	if (coro->prev) coro->prev->next = coro->next;
		1230	if (coro == coro_first) coro_first = coro->next;
		1231
		1232	return 1;
		1233	}
		1234
824	static void	1235	static int
		1236	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1237	{
		1238	struct coro *coro = (struct coro *)mg->mg_ptr;
		1239	mg->mg_ptr = 0;
		1240
		1241	coro->hv = 0;
		1242
		1243	if (--coro->refcnt < 0)
		1244	{
		1245	coro_state_destroy (aTHX_ coro);
		1246	Safefree (coro);
		1247	}
		1248
		1249	return 0;
		1250	}
		1251
		1252	static int
		1253	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1254	{
		1255	struct coro *coro = (struct coro *)mg->mg_ptr;
		1256
		1257	++coro->refcnt;
		1258
		1259	return 0;
		1260	}
		1261
		1262	static MGVTBL coro_state_vtbl = {
		1263	0, 0, 0, 0,
		1264	coro_state_free,
		1265	0,
		1266	#ifdef MGf_DUP
		1267	coro_state_dup,
		1268	#else
		1269	# define MGf_DUP 0
		1270	#endif
		1271	};
		1272
		1273	static void
		1274	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1275	{
		1276	ta->prev = SvSTATE (prev_sv);
		1277	ta->next = SvSTATE (next_sv);
		1278	TRANSFER_CHECK (*ta);
		1279	}
		1280
		1281	static void
825	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1282	api_transfer (SV *prev_sv, SV *next_sv)
826	{	1283	{
827	SV_CORO (prev, "Coro::transfer");	1284	dTHX;
828	SV_CORO (next, "Coro::transfer");	1285	struct transfer_args ta;
829		1286
830	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1287	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1288	TRANSFER (ta);
831	}	1289	}
832		1290
833	/** Coro ********************************************************************/	1291	/** Coro ********************************************************************/
834		1292
835	#define PRIO_MAX 3
836	#define PRIO_HIGH 1
837	#define PRIO_NORMAL 0
838	#define PRIO_LOW -1
839	#define PRIO_IDLE -3
840	#define PRIO_MIN -4
841
842	/* for Coro.pm */
843	static GV *coro_current, *coro_idle;
844	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
845	static int coro_nready;
846
847	static void	1293	static void
848	coro_enq (SV *sv)	1294	coro_enq (pTHX_ SV *coro_sv)
849	{	1295	{
850	if (SvTYPE (sv) == SVt_PVHV)
851	{
852	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
853	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
854
855	prio = prio > PRIO_MAX ? PRIO_MAX
856	: prio < PRIO_MIN ? PRIO_MIN
857	: prio;
858
859	av_push (coro_ready [prio - PRIO_MIN], sv);	1296	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
860	coro_nready++;
861
862	return;
863	}
864
865	croak ("Coro::ready tried to enqueue something that is not a coroutine");
866	}	1297	}
867		1298
868	static SV *	1299	static SV *
869	coro_deq (int min_prio)	1300	coro_deq (pTHX_ int min_prio)
870	{	1301	{
871	int prio = PRIO_MAX - PRIO_MIN;	1302	int prio = PRIO_MAX - PRIO_MIN;
872		1303
873	min_prio -= PRIO_MIN;	1304	min_prio -= PRIO_MIN;
874	if (min_prio < 0)	1305	if (min_prio < 0)
875	min_prio = 0;	1306	min_prio = 0;
876		1307
877	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1308	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
878	if (av_len (coro_ready[prio]) >= 0)	1309	if (AvFILLp (coro_ready [prio]) >= 0)
879	{
880	coro_nready--;
881	return av_shift (coro_ready[prio]);	1310	return av_shift (coro_ready [prio]);
882	}
883		1311
884	return 0;	1312	return 0;
885	}	1313	}
886		1314
887	static void	1315	static int
888	api_ready (SV *coro)	1316	api_ready (SV *coro_sv)
889	{	1317	{
		1318	dTHX;
		1319	struct coro *coro;
		1320
890	if (SvROK (coro))	1321	if (SvROK (coro_sv))
891	coro = SvRV (coro);	1322	coro_sv = SvRV (coro_sv);
		1323
		1324	coro = SvSTATE (coro_sv);
		1325
		1326	if (coro->flags & CF_READY)
		1327	return 0;
		1328
		1329	coro->flags |= CF_READY;
892		1330
893	LOCK;	1331	LOCK;
894	coro_enq (SvREFCNT_inc (coro));	1332	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1333	++coro_nready;
895	UNLOCK;	1334	UNLOCK;
		1335
		1336	return 1;
		1337	}
		1338
		1339	static int
		1340	api_is_ready (SV *coro_sv)
		1341	{
		1342	dTHX;
		1343	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1344	}
		1345
		1346	static void
		1347	prepare_schedule (pTHX_ struct transfer_args *ta)
		1348	{
		1349	SV *prev_sv, *next_sv;
		1350
		1351	for (;;)
		1352	{
		1353	LOCK;
		1354	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1355
		1356	/* nothing to schedule: call the idle handler */
		1357	if (expect_false (!next_sv))
		1358	{
		1359	dSP;
		1360	UNLOCK;
		1361
		1362	ENTER;
		1363	SAVETMPS;
		1364
		1365	PUSHMARK (SP);
		1366	PUTBACK;
		1367	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1368
		1369	FREETMPS;
		1370	LEAVE;
		1371	continue;
		1372	}
		1373
		1374	ta->next = SvSTATE (next_sv);
		1375
		1376	/* cannot transfer to destroyed coros, skip and look for next */
		1377	if (expect_false (ta->next->flags & CF_DESTROYED))
		1378	{
		1379	UNLOCK;
		1380	SvREFCNT_dec (next_sv);
		1381	/* coro_nready is already taken care of by destroy */
		1382	continue;
		1383	}
		1384
		1385	--coro_nready;
		1386	UNLOCK;
		1387	break;
		1388	}
		1389
		1390	/* free this only after the transfer */
		1391	prev_sv = SvRV (coro_current);
		1392	ta->prev = SvSTATE (prev_sv);
		1393	TRANSFER_CHECK (*ta);
		1394	assert (ta->next->flags & CF_READY);
		1395	ta->next->flags &= ~CF_READY;
		1396	SvRV_set (coro_current, next_sv);
		1397
		1398	LOCK;
		1399	free_coro_mortal (aTHX);
		1400	coro_mortal = prev_sv;
		1401	UNLOCK;
		1402	}
		1403
		1404	static void
		1405	prepare_cede (pTHX_ struct transfer_args *ta)
		1406	{
		1407	api_ready (coro_current);
		1408	prepare_schedule (aTHX_ ta);
		1409	}
		1410
		1411	static int
		1412	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1413	{
		1414	if (coro_nready)
		1415	{
		1416	SV *prev = SvRV (coro_current);
		1417	prepare_schedule (aTHX_ ta);
		1418	api_ready (prev);
		1419	return 1;
		1420	}
		1421	else
		1422	return 0;
896	}	1423	}
897		1424
898	static void	1425	static void
899	api_schedule (void)	1426	api_schedule (void)
900	{	1427	{
901	SV *prev, *next;	1428	dTHX;
		1429	struct transfer_args ta;
902		1430
903	LOCK;	1431	prepare_schedule (aTHX_ &ta);
904		1432	TRANSFER (ta);
905	prev = SvRV (GvSV (coro_current));
906	next = coro_deq (PRIO_MIN);
907
908	if (!next)
909	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
910
911	/* free this only after the transfer */
912	coro_mortal = prev;
913	SV_CORO (prev, "Coro::schedule");
914
915	SvRV (GvSV (coro_current)) = next;
916
917	SV_CORO (next, "Coro::schedule");
918
919	UNLOCK;
920
921	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
922	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
923	}	1433	}
924		1434
925	static void	1435	static int
926	api_cede (void)	1436	api_cede (void)
927	{	1437	{
928	LOCK;	1438	dTHX;
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1439	struct transfer_args ta;
930	UNLOCK;
931		1440
932	api_schedule ();	1441	prepare_cede (aTHX_ &ta);
933	}
934		1442
		1443	if (expect_true (ta.prev != ta.next))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
		1450	}
		1451
		1452	static int
		1453	api_cede_notself (void)
		1454	{
		1455	dTHX;
		1456	struct transfer_args ta;
		1457
		1458	if (prepare_cede_notself (aTHX_ &ta))
		1459	{
		1460	TRANSFER (ta);
		1461	return 1;
		1462	}
		1463	else
		1464	return 0;
		1465	}
		1466
		1467	static void
		1468	api_trace (SV *coro_sv, int flags)
		1469	{
		1470	dTHX;
		1471	struct coro *coro = SvSTATE (coro_sv);
		1472
		1473	if (flags & CC_TRACE)
		1474	{
		1475	if (!coro->cctx)
		1476	coro->cctx = cctx_new ();
		1477	else if (!(coro->cctx->flags & CC_TRACE))
		1478	croak ("cannot enable tracing on coroutine with custom stack");
		1479
		1480	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1481	}
		1482	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1483	{
		1484	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1485
		1486	if (coro->flags & CF_RUNNING)
		1487	PL_runops = RUNOPS_DEFAULT;
		1488	else
		1489	coro->slot->runops = RUNOPS_DEFAULT;
		1490	}
		1491	}
		1492
935	MODULE = Coro::State PACKAGE = Coro::State	1493	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936		1494
937	PROTOTYPES: ENABLE	1495	PROTOTYPES: DISABLE
938		1496
939	BOOT:	1497	BOOT:
940	{ /* {} necessary for stoopid perl-5.6.x */	1498	{
941	#ifdef USE_ITHREADS	1499	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1500	MUTEX_INIT (&coro_mutex);
943	#endif	1501	#endif
		1502	BOOT_PAGESIZE;
944		1503
945	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1504	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
946	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1505	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1506
		1507	hv_sig = coro_get_hv ("SIG", TRUE);
		1508	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1509	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1510
		1511	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1512	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1513
947	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1514	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
948		1515
949	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
950	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
951	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
952	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
953		1520
954	main_mainstack = PL_mainstack;	1521	main_mainstack = PL_mainstack;
		1522	main_top_env = PL_top_env;
		1523
		1524	while (main_top_env->je_prev)
		1525	main_top_env = main_top_env->je_prev;
955		1526
956	coroapi.ver = CORO_API_VERSION;	1527	coroapi.ver = CORO_API_VERSION;
957	coroapi.transfer = api_transfer;	1528	coroapi.transfer = api_transfer;
958	}
959		1529
960	Coro::State	1530	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	_newprocess(args)	1531	}
962	SV * args	1532
963	PROTOTYPE: $	1533	SV *
		1534	new (char *klass, ...)
964	CODE:	1535	CODE:
965	Coro__State coro;	1536	{
		1537	struct coro *coro;
		1538	HV *hv;
		1539	int i;
966		1540
967	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
968	croak ("Coro::State::_newprocess expects an arrayref");
969
970	Newz (0, coro, 1, struct coro);	1541	Newz (0, coro, 1, struct coro);
		1542	coro->args = newAV ();
		1543	coro->flags = CF_NEW;
971		1544
972	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1545	if (coro_first) coro_first->prev = coro;
973	coro->mainstack = 0; /* actual work is done inside transfer */	1546	coro->next = coro_first;
974	coro->stack = 0;	1547	coro_first = coro;
975		1548
976	/* same as JMPENV_BOOTSTRAP */	1549	coro->hv = hv = newHV ();
977	/* we might be able to recycle start_env, but safe is safe */	1550	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
978	//Zero(&coro->start_env, 1, JMPENV);	1551	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
979	coro->start_env.je_ret = -1;
980	coro->start_env.je_mustcatch = TRUE;
981		1552
982	RETVAL = coro;	1553	av_extend (coro->args, items - 1);
		1554	for (i = 1; i < items; i++)
		1555	av_push (coro->args, newSVsv (ST (i)));
		1556	}
983	OUTPUT:	1557	OUTPUT:
984	RETVAL	1558	RETVAL
985		1559
		1560	# these not obviously related functions are all rolled into the same xs
		1561	# function to increase chances that they all will call transfer with the same
		1562	# stack offset
986	void	1563	void
987	transfer(prev, next, flags)	1564	_set_stacklevel (...)
988	SV *prev	1565	ALIAS:
989	SV *next	1566	Coro::State::transfer = 1
990	int flags	1567	Coro::schedule = 2
991	PROTOTYPE: @	1568	Coro::cede = 3
		1569	Coro::cede_notself = 4
		1570	Coro::Event::next = 5
		1571	Coro::Event::next_cancel = 6
992	CODE:	1572	PPCODE:
993	PUTBACK;	1573	{
994	SV_CORO (next, "Coro::transfer");	1574	struct transfer_args ta;
995	SV_CORO (prev, "Coro::transfer");	1575	int again = 0;
996	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1576
997	SPAGAIN;	1577	do
		1578	{
		1579	switch (ix)
		1580	{
		1581	case 0:
		1582	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1583	ta.next = 0;
		1584	break;
		1585
		1586	case 1:
		1587	if (items != 2)
		1588	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1589
		1590	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1591	break;
		1592
		1593	case 2:
		1594	prepare_schedule (aTHX_ &ta);
		1595	break;
		1596
		1597	case 3:
		1598	prepare_cede (aTHX_ &ta);
		1599	break;
		1600
		1601	case 4:
		1602	if (!prepare_cede_notself (aTHX_ &ta))
		1603	XSRETURN_EMPTY;
		1604
		1605	break;
		1606
		1607	case 5:
		1608	case 6:
		1609	if (items != 1)
		1610	croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
		1611
		1612	{
		1613	SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
		1614
		1615	if (ev)
		1616	{
		1617	if (GIMME_V != G_VOID)
		1618	{
		1619	XPUSHs (ev);
		1620	XSRETURN (1);
		1621	}
		1622	else
		1623	XSRETURN_EMPTY;
		1624	}
		1625	}
		1626
		1627	prepare_schedule (aTHX_ &ta);
		1628	again = 1;
		1629	break;
		1630	}
		1631
		1632	BARRIER;
		1633	TRANSFER (ta);
		1634	BARRIER;
		1635	}
		1636	while (again);
		1637
		1638	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1639	XSRETURN_YES;
		1640
		1641	XSRETURN_EMPTY; /* not understood why this is necessary, likely some stack handling bug */
		1642
		1643	bool
		1644	_destroy (SV *coro_sv)
		1645	CODE:
		1646	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1647	OUTPUT:
		1648	RETVAL
998		1649
999	void	1650	void
1000	DESTROY(coro)
1001	Coro::State coro
1002	CODE:
1003
1004	if (coro->mainstack && coro->mainstack != main_mainstack)
1005	{
1006	struct coro temp;
1007
1008	PUTBACK;
1009	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1010	LOAD(aTHX_ coro);
1011	SPAGAIN;
1012
1013	destroy_stacks (aTHX);
1014
1015	LOAD((&temp)); /* this will get rid of defsv etc.. */
1016	SPAGAIN;
1017
1018	coro->mainstack = 0;
1019	}
1020
1021	deallocate_stack (coro);
1022	SvREFCNT_dec (coro->args);
1023	Safefree (coro);
1024
1025	void
1026	_exit(code)	1651	_exit (code)
1027	int code	1652	int code
1028	PROTOTYPE: $	1653	PROTOTYPE: $
1029	CODE:	1654	CODE:
1030	_exit (code);	1655	_exit (code);
1031		1656
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1657	int
		1658	cctx_stacksize (int new_stacksize = 0)
		1659	CODE:
		1660	RETVAL = coro_stacksize;
		1661	if (new_stacksize)
		1662	coro_stacksize = new_stacksize;
		1663	OUTPUT:
		1664	RETVAL
1033		1665
1034	# this is slightly dirty (should expose a c-level api)	1666	int
		1667	cctx_count ()
		1668	CODE:
		1669	RETVAL = cctx_count;
		1670	OUTPUT:
		1671	RETVAL
		1672
		1673	int
		1674	cctx_idle ()
		1675	CODE:
		1676	RETVAL = cctx_idle;
		1677	OUTPUT:
		1678	RETVAL
1035		1679
1036	void	1680	void
1037	yield(...)	1681	list ()
1038	PROTOTYPE: @	1682	PPCODE:
		1683	{
		1684	struct coro *coro;
		1685	for (coro = coro_first; coro; coro = coro->next)
		1686	if (coro->hv)
		1687	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1688	}
		1689
		1690	void
		1691	call (Coro::State coro, SV *coderef)
		1692	ALIAS:
		1693	eval = 1
		1694	CODE:
		1695	{
		1696	if (coro->mainstack)
		1697	{
		1698	struct coro temp;
		1699
		1700	if (!(coro->flags & CF_RUNNING))
		1701	{
		1702	save_perl (aTHX_ &temp);
		1703	load_perl (aTHX_ coro);
		1704	}
		1705
		1706	{
		1707	dSP;
		1708	ENTER;
		1709	SAVETMPS;
		1710	PUTBACK;
		1711	PUSHSTACK;
		1712	PUSHMARK (SP);
		1713
		1714	if (ix)
		1715	eval_sv (coderef, 0);
		1716	else
		1717	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1718
		1719	POPSTACK;
		1720	FREETMPS;
		1721	LEAVE;
		1722	}
		1723
		1724	if (!(coro->flags & CF_RUNNING))
		1725	{
		1726	save_perl (aTHX_ coro);
		1727	load_perl (aTHX_ &temp);
		1728	}
		1729	}
		1730	}
		1731
		1732	SV *
		1733	is_ready (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	is_ready = CF_READY
		1737	is_running = CF_RUNNING
		1738	is_new = CF_NEW
		1739	is_destroyed = CF_DESTROYED
		1740	CODE:
		1741	RETVAL = boolSV (coro->flags & ix);
		1742	OUTPUT:
		1743	RETVAL
		1744
		1745	void
		1746	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1747
		1748	SV *
		1749	has_stack (Coro::State coro)
		1750	PROTOTYPE: $
		1751	CODE:
		1752	RETVAL = boolSV (!!coro->cctx);
		1753	OUTPUT:
		1754	RETVAL
		1755
		1756	int
		1757	is_traced (Coro::State coro)
		1758	PROTOTYPE: $
		1759	CODE:
		1760	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1761	OUTPUT:
		1762	RETVAL
		1763
		1764	IV
		1765	rss (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	usecount = 1
1039	CODE:	1769	CODE:
1040	static SV *returnstk;	1770	switch (ix)
1041	SV *sv;	1771	{
1042	AV *defav = GvAV (PL_defgv);	1772	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1043	struct coro *prev, *next;	1773	case 1: RETVAL = coro->usecount; break;
		1774	}
		1775	OUTPUT:
		1776	RETVAL
1044		1777
1045	if (!returnstk)
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048	/* set up @_ -- ugly */
1049	av_clear (defav);
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1057	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1778
1062	MODULE = Coro::State PACKAGE = Coro	1779	MODULE = Coro::State PACKAGE = Coro
1063		1780
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1781	BOOT:
1067	{	1782	{
1068	int i;	1783	int i;
		1784
		1785	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1786	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1787	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1788
		1789	coro_current = coro_get_sv ("Coro::current", FALSE);
		1790	SvREADONLY_on (coro_current);
		1791
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1792	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1793
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1794	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1795	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1796	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1797	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1798	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1799	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1800
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1801	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1802	coro_ready[i] = newAV ();
1083		1803
1084	{	1804	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1805	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1806	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1086		1807
1087	coroapi.schedule = api_schedule;	1808	coroapi.schedule = api_schedule;
1088	coroapi.cede = api_cede;	1809	coroapi.cede = api_cede;
		1810	coroapi.cede_notself = api_cede_notself;
1089	coroapi.ready = api_ready;	1811	coroapi.ready = api_ready;
		1812	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1813	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1814	coroapi.current = coro_current;
1092		1815
1093	GCoroAPI = &coroapi;	1816	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1817	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1818	SvREADONLY_on (sv);
1096	}	1819	}
1097	}	1820	}
1098		1821
1099	#if !PERL_MICRO
1100
1101	void	1822	void
1102	ready(self)	1823	_set_current (SV *current)
1103	SV * self
1104	PROTOTYPE: $	1824	PROTOTYPE: $
1105	CODE:	1825	CODE:
1106	api_ready (self);	1826	SvREFCNT_dec (SvRV (coro_current));
1107		1827	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1108	#endif
1109		1828
1110	int	1829	int
		1830	prio (Coro::State coro, int newprio = 0)
		1831	ALIAS:
		1832	nice = 1
		1833	CODE:
		1834	{
		1835	RETVAL = coro->prio;
		1836
		1837	if (items > 1)
		1838	{
		1839	if (ix)
		1840	newprio = coro->prio - newprio;
		1841
		1842	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1843	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1844
		1845	coro->prio = newprio;
		1846	}
		1847	}
		1848	OUTPUT:
		1849	RETVAL
		1850
		1851	SV *
		1852	ready (SV *self)
		1853	PROTOTYPE: $
		1854	CODE:
		1855	RETVAL = boolSV (api_ready (self));
		1856	OUTPUT:
		1857	RETVAL
		1858
		1859	int
1111	nready(...)	1860	nready (...)
1112	PROTOTYPE:	1861	PROTOTYPE:
1113	CODE:	1862	CODE:
1114	RETVAL = coro_nready;	1863	RETVAL = coro_nready;
1115	OUTPUT:	1864	OUTPUT:
1116	RETVAL	1865	RETVAL
1117		1866
1118	void	1867	void
1119	schedule(...)	1868	throw (Coro::State self, SV *throw = &PL_sv_undef)
1120	PROTOTYPE:	1869	PROTOTYPE: $;$
		1870	CODE:
		1871	SvREFCNT_dec (self->throw);
		1872	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1873
		1874	# for async_pool speedup
		1875	void
		1876	_pool_1 (SV *cb)
1121	CODE:	1877	CODE:
1122	api_schedule ();	1878	{
		1879	struct coro *coro = SvSTATE (coro_current);
		1880	HV *hv = (HV *)SvRV (coro_current);
		1881	AV *defav = GvAV (PL_defgv);
		1882	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1883	AV *invoke_av;
		1884	int i, len;
		1885
		1886	if (!invoke)
		1887	croak ("\3async_pool terminate\2\n");
		1888
		1889	SvREFCNT_dec (coro->saved_deffh);
		1890	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1891
		1892	hv_store (hv, "desc", sizeof ("desc") - 1,
		1893	newSVpvn (strpair ("[async_pool]")), 0);
		1894
		1895	invoke_av = (AV *)SvRV (invoke);
		1896	len = av_len (invoke_av);
		1897
		1898	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1899
		1900	if (len > 0)
		1901	{
		1902	av_fill (defav, len - 1);
		1903	for (i = 0; i < len; ++i)
		1904	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1905	}
		1906
		1907	SvREFCNT_dec (invoke);
		1908	}
1123		1909
1124	void	1910	void
1125	cede(...)	1911	_pool_2 (SV *cb)
1126	PROTOTYPE:
1127	CODE:	1912	CODE:
1128	api_cede ();	1913	{
		1914	struct coro *coro = SvSTATE (coro_current);
1129		1915
		1916	sv_setsv (cb, &PL_sv_undef);
		1917
		1918	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1919	coro->saved_deffh = 0;
		1920
		1921	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1922	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1923	croak ("\3async_pool terminate\2\n");
		1924
		1925	av_clear (GvAV (PL_defgv));
		1926	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1927	newSVpvn (strpair ("[async_pool idle]")), 0);
		1928
		1929	coro->prio = 0;
		1930
		1931	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1932	api_trace (coro_current, 0);
		1933
		1934	av_push (av_async_pool, newSVsv (coro_current));
		1935	}
		1936
		1937
		1938	MODULE = Coro::State PACKAGE = Coro::AIO
		1939
		1940	SV *
		1941	_get_state ()
		1942	CODE:
		1943	{
		1944	struct io_state *data;
		1945
		1946	RETVAL = newSV (sizeof (struct io_state));
		1947	data = (struct io_state *)SvPVX (RETVAL);
		1948	SvCUR_set (RETVAL, sizeof (struct io_state));
		1949	SvPOK_only (RETVAL);
		1950
		1951	data->errorno = errno;
		1952	data->laststype = PL_laststype;
		1953	data->laststatval = PL_laststatval;
		1954	data->statcache = PL_statcache;
		1955	}
		1956	OUTPUT:
		1957	RETVAL
		1958
		1959	void
		1960	_set_state (char *data_)
		1961	PROTOTYPE: $
		1962	CODE:
		1963	{
		1964	struct io_state *data = (void *)data_;
		1965
		1966	errno = data->errorno;
		1967	PL_laststype = data->laststype;
		1968	PL_laststatval = data->laststatval;
		1969	PL_statcache = data->statcache;
		1970	}
		1971

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