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Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.202 by root, Mon Oct 8 02:50:23 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	/* data associated with this coroutine (initial args) */
129	AV *args;	227	AV *args;
		228	int refcnt;
		229	int flags; /* CF_ flags */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV *throw;
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
		243	HV *hv; /* the perl hash associated with this coro, if any */
130	};	244	};
131		245
132	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
133	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
134		248
135	static AV *main_mainstack; /* used to differentiate between $main and others */	249	/** 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		250
141	/* mostly copied from op.c:cv_clone2 */	251	#define PRIO_MAX 3
142	STATIC AV *	252	#define PRIO_HIGH 1
143	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)
144	{	268	{
145	AV *av;	269	#if PERL_VERSION_ATLEAST (5,9,0)
146	I32 ix;	270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
147	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	271	get_sv (name, create);
148	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	272	#endif
149	SV **pname = AvARRAY (protopad_name);	273	return get_sv (name, create);
150	SV **ppad = AvARRAY (protopad);	274	}
151	I32 fname = AvFILLp (protopad_name);	275
152	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);
153	AV *newpadlist, *newpad_name, *newpad;	300	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		301
164	newpadlist = newAV ();	302	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	303	AvREAL_off (newpadlist);
166	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)));
167	av_store (newpadlist, 1, (SV *) newpad);	313	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		314
238	return newpadlist;	315	return newpadlist;
239	}	316	}
240		317
241	STATIC void	318	static void
242	free_padlist (AV *padlist)	319	free_padlist (pTHX_ AV *padlist)
243	{	320	{
244	/* may be during global destruction */	321	/* may be during global destruction */
245	if (SvREFCNT (padlist))	322	if (SvREFCNT (padlist))
246	{	323	{
247	I32 i = AvFILLp (padlist);	324	I32 i = AvFILLp (padlist);
…		…
260		337
261	SvREFCNT_dec ((SV*)padlist);	338	SvREFCNT_dec ((SV*)padlist);
262	}	339	}
263	}	340	}
264		341
265	STATIC int	342	static int
266	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	343	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267	{	344	{
268	AV *padlist;	345	AV *padlist;
269	AV *av = (AV *)mg->mg_obj;	346	AV *av = (AV *)mg->mg_obj;
270		347
271	/* casting is fun. */	348	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	349	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (padlist);	350	free_padlist (aTHX_ padlist);
		351
		352	SvREFCNT_dec (av);
		353
		354	return 0;
274	}	355	}
275		356
276	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define PERL_MAGIC_coro PERL_MAGIC_ext
277		358
278	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
279		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
280	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
281	STATIC void	395	static void
282	get_padlist (CV *cv)	396	get_padlist (pTHX_ CV *cv)
283	{	397	{
284	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
285		400
286	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
287	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288	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
289	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		413	#endif
		414	}
290	}	415	}
291		416
292	STATIC void	417	static void
293	put_padlist (CV *cv)	418	put_padlist (pTHX_ CV *cv)
294	{	419	{
295	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	420	MAGIC *mg = CORO_MAGIC (cv);
		421	AV *av;
296		422
297	if (!mg)	423	if (expect_false (!mg))
298	{	424	{
299	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
300	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
302	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
303	}	429	}
304		430
305	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	431	av = (AV *)mg->mg_obj;
306	}
307		432
308	#define SB do {	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
309	#define SE } while (0)	434	av_extend (av, AvMAX (av) + 1);
310		435
311	#define LOAD(state) load_state(aTHX_ (state));	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
312	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	437	}
313		438
314	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	439	/** load & save, init *******************************************************/
315		440
316	static void	441	static void
317	load_state(pTHX_ Coro__State c)	442	load_perl (pTHX_ Coro__State c)
318	{	443	{
319	PL_dowarn = c->dowarn;	444	perl_slots *slot = c->slot;
320	PL_in_eval = c->in_eval;	445	c->slot = 0;
321		446
322	PL_curstackinfo = c->curstackinfo;
323	PL_curstack = c->curstack;
324	PL_mainstack = c->mainstack;	447	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		448
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	449	GvSV (PL_defgv) = slot->defsv;
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	450	GvAV (PL_defgv) = slot->defav;
352	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);*/
353		460
354	{	461	{
355	dSP;	462	dSP;
		463
356	CV *cv;	464	CV *cv;
357		465
358	/* now do the ugly restore mess */	466	/* now do the ugly restore mess */
359	while ((cv = (CV *)POPs))	467	while (expect_true (cv = (CV *)POPs))
360	{	468	{
361	AV *padlist = (AV *)POPs;
362
363	if (padlist)
364	{
365	put_padlist (cv); /* mark this padlist as available */	469	put_padlist (aTHX_ cv); /* mark this padlist as available */
366	CvPADLIST(cv) = padlist;	470	CvDEPTH (cv) = PTR2IV (POPs);
367	}	471	CvPADLIST (cv) = (AV *)POPs;
368
369	++CvDEPTH(cv);
370	}	472	}
371		473
372	PUTBACK;	474	PUTBACK;
373	}	475	}
374	}	476	}
375		477
376	static void	478	static void
377	save_state(pTHX_ Coro__State c, int flags)	479	save_perl (pTHX_ Coro__State c)
378	{	480	{
379	{	481	{
380	dSP;	482	dSP;
381	I32 cxix = cxstack_ix;	483	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	484	PERL_CONTEXT *ccstk = cxstack;
…		…
385	/*	487	/*
386	* 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
387	* (and reinitialize) all cv's in the whole callchain :(	489	* (and reinitialize) all cv's in the whole callchain :(
388	*/	490	*/
389		491
390	PUSHs (Nullsv);	492	XPUSHs (Nullsv);
391	/* this loop was inspired by pp_caller */	493	/* this loop was inspired by pp_caller */
392	for (;;)	494	for (;;)
393	{	495	{
394	while (cxix >= 0)	496	while (expect_true (cxix >= 0))
395	{	497	{
396	PERL_CONTEXT *cx = &ccstk[cxix--];	498	PERL_CONTEXT *cx = &ccstk[cxix--];
397		499
398	if (CxTYPE(cx) == CXt_SUB)	500	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
399	{	501	{
400	CV *cv = cx->blk_sub.cv;	502	CV *cv = cx->blk_sub.cv;
		503
401	if (CvDEPTH(cv))	504	if (expect_true (CvDEPTH (cv)))
402	{	505	{
403	EXTEND (SP, CvDEPTH(cv)*2);	506	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));	507	PUSHs ((SV *)CvPADLIST (cv));
		508	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
413	PUSHs ((SV *)cv);	509	PUSHs ((SV *)cv);
414		510
415	get_padlist (cv); /* this is a monster */	511	CvDEPTH (cv) = 0;
		512	get_padlist (aTHX_ cv);
416	}	513	}
417	}	514	}
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	}	515	}
427		516
428	if (top_si->si_type == PERLSI_MAIN)	517	if (expect_true (top_si->si_type == PERLSI_MAIN))
429	break;	518	break;
430		519
431	top_si = top_si->si_prev;	520	top_si = top_si->si_prev;
432	ccstk = top_si->si_cxstack;	521	ccstk = top_si->si_cxstack;
433	cxix = top_si->si_cxix;	522	cxix = top_si->si_cxix;
434	}	523	}
435		524
436	PUTBACK;	525	PUTBACK;
437	}	526	}
438		527
439	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	528	/* allocate some space on the context stack for our purposes */
440	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	529	/* we manually unroll here, as usually 2 slots is enough */
441	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 */
442		539
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;	540	c->mainstack = PL_mainstack;
449	c->stack_sp = PL_stack_sp;	541
450	c->op = PL_op;	542	{
451	c->curpad = PL_curpad;	543	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
452	c->comppad = PL_comppad;	544
453	c->stack_base = PL_stack_base;	545	slot->defav = GvAV (PL_defgv);
454	c->stack_max = PL_stack_max;	546	slot->defsv = DEFSV;
455	c->tmps_stack = PL_tmps_stack;	547	slot->errsv = ERRSV;
456	c->tmps_floor = PL_tmps_floor;	548	slot->irsgv = GvSV (irsgv);
457	c->tmps_ix = PL_tmps_ix;	549
458	c->tmps_max = PL_tmps_max;	550	#define VAR(name,type) slot->name = PL_ ## name;
459	c->markstack = PL_markstack;	551	# include "state.h"
460	c->markstack_ptr = PL_markstack_ptr;	552	#undef VAR
461	c->markstack_max = PL_markstack_max;	553	}
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	}	554	}
474		555
475	/*	556	/*
476	* allocate various perl stacks. This is an exact copy	557	* allocate various perl stacks. This is an exact copy
477	* of perl.c:init_stacks, except that it uses less memory	558	* of perl.c:init_stacks, except that it uses less memory
478	* on the (sometimes correct) assumption that coroutines do	559	* on the (sometimes correct) assumption that coroutines do
479	* not usually need a lot of stackspace.	560	* not usually need a lot of stackspace.
480	*/	561	*/
481	STATIC void	562	#if 1
		563	# define coro_init_stacks init_stacks
		564	#else
		565	static void
482	coro_init_stacks (pTHX)	566	coro_init_stacks (pTHX)
483	{	567	{
484	LOCK;	568	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;	569	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	570	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	571	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		572
491	PL_stack_base = AvARRAY(PL_curstack);	573	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	574	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	575	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		576
495	New(50,PL_tmps_stack,96,SV*);	577	New(50,PL_tmps_stack,32,SV*);
496	PL_tmps_floor = -1;	578	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	579	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	580	PL_tmps_max = 32;
499		581
500	New(54,PL_markstack,16,I32);	582	New(54,PL_markstack,16,I32);
501	PL_markstack_ptr = PL_markstack;	583	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	584	PL_markstack_max = PL_markstack + 16;
503		585
504	#ifdef SET_MARK_OFFSET	586	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;	587	SET_MARK_OFFSET;
506	#endif	588	#endif
507		589
508	New(54,PL_scopestack,16,I32);	590	New(54,PL_scopestack,8,I32);
509	PL_scopestack_ix = 0;	591	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	592	PL_scopestack_max = 8;
511		593
512	New(54,PL_savestack,96,ANY);	594	New(54,PL_savestack,24,ANY);
513	PL_savestack_ix = 0;	595	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	596	PL_savestack_max = 24;
515		597
		598	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	599	New(54,PL_retstack,4,OP*);
517	PL_retstack_ix = 0;	600	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	601	PL_retstack_max = 4;
519		602	#endif
520	UNLOCK;
521	}	603	}
		604	#endif
522		605
523	/*	606	/*
524	* destroy the stacks, the callchain etc...	607	* destroy the stacks, the callchain etc...
525	*/	608	*/
526	STATIC void	609	static void
527	destroy_stacks(pTHX)	610	coro_destroy_stacks (pTHX)
528	{	611	{
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)	612	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	613	PL_curstackinfo = PL_curstackinfo->si_next;
540		614
541	while (PL_curstackinfo)	615	while (PL_curstackinfo)
542	{	616	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	617	PERL_SI *p = PL_curstackinfo->si_prev;
544		618
545	{
546	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */
549	}
550
551	if (!IN_DESTRUCT)	619	if (!IN_DESTRUCT)
552	{
553	dounwind(-1);
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	620	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}
556		621
557	Safefree(PL_curstackinfo->si_cxstack);	622	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	623	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	624	PL_curstackinfo = p;
560	}	625	}
561		626
562	Safefree(PL_tmps_stack);	627	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	628	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	629	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	630	Safefree (PL_savestack);
		631	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	632	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	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)
587	{	647	{
588	/*FIXME*//*D*//* reasonable stack size! */	648	slot = &tmp_slot;
589	stack->ssize = - (8192 * sizeof (long));	649
590	New (0, stack->sptr, 8192, long);	650	#define VAR(name,type) slot->name = PL_ ## name;
		651	# include "state.h"
		652	#undef VAR
591	}	653	}
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	654	else
614	#endif	655	slot = coro->slot;
615	Safefree (stack->sptr);
616		656
617	Safefree (stack);	657	rss += sizeof (slot->curstackinfo);
618	}	658	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
619	else if (ctx->gencnt == stack->gencnt)	659	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
620	--stack->usecnt;	660	rss += slot->tmps_max * sizeof (SV *);
621	}	661	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
622	}	662	rss += slot->scopestack_max * sizeof (I32);
		663	rss += slot->savestack_max * sizeof (ANY);
623		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
624	static void	675	static void
625	setup_coro (void *arg)	676	coro_setup (pTHX_ struct coro *coro)
626	{	677	{
627	/*	678	/*
628	* emulate part of the perl startup here.	679	* emulate part of the perl startup here.
629	*/	680	*/
		681	coro_init_stacks (aTHX);
		682
		683	PL_runops = RUNOPS_DEFAULT;
		684	PL_curcop = &PL_compiling;
		685	PL_in_eval = EVAL_NULL;
		686	PL_comppad = 0;
		687	PL_curpm = 0;
		688	PL_curpad = 0;
		689	PL_localizing = 0;
		690	PL_dirty = 0;
		691	PL_restartop = 0;
		692	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		693	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		694
		695	GvSV (PL_defgv) = newSV (0);
		696	GvAV (PL_defgv) = coro->args; coro->args = 0;
		697	GvSV (PL_errgv) = newSV (0);
		698	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		699	PL_rs = newSVsv (GvSV (irsgv));
		700	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		701
		702	{
		703	dSP;
		704	LOGOP myop;
		705
		706	Zero (&myop, 1, LOGOP);
		707	myop.op_next = Nullop;
		708	myop.op_flags = OPf_WANT_VOID;
		709
		710	PUSHMARK (SP);
		711	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		712	PUTBACK;
		713	PL_op = (OP *)&myop;
		714	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		715	SPAGAIN;
		716	}
		717
		718	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		719	}
		720
		721	static void
		722	coro_destroy (pTHX_ struct coro *coro)
		723	{
		724	if (!IN_DESTRUCT)
		725	{
		726	/* restore all saved variables and stuff */
		727	LEAVE_SCOPE (0);
		728	assert (PL_tmps_floor == -1);
		729
		730	/* free all temporaries */
		731	FREETMPS;
		732	assert (PL_tmps_ix == -1);
		733
		734	/* unwind all extra stacks */
		735	POPSTACK_TO (PL_mainstack);
		736
		737	/* unwind main stack */
		738	dounwind (-1);
		739	}
		740
		741	SvREFCNT_dec (GvSV (PL_defgv));
		742	SvREFCNT_dec (GvAV (PL_defgv));
		743	SvREFCNT_dec (GvSV (PL_errgv));
		744	SvREFCNT_dec (PL_defoutgv);
		745	SvREFCNT_dec (PL_rs);
		746	SvREFCNT_dec (GvSV (irsgv));
		747
		748	SvREFCNT_dec (PL_diehook);
		749	SvREFCNT_dec (PL_warnhook);
		750
		751	SvREFCNT_dec (coro->saved_deffh);
		752	SvREFCNT_dec (coro->throw);
		753
		754	coro_destroy_stacks (aTHX);
		755	}
		756
		757	static void
		758	free_coro_mortal (pTHX)
		759	{
		760	if (expect_true (coro_mortal))
		761	{
		762	SvREFCNT_dec (coro_mortal);
		763	coro_mortal = 0;
		764	}
		765	}
		766
		767	static int
		768	runops_trace (pTHX)
		769	{
		770	COP *oldcop = 0;
		771	int oldcxix = -2;
		772	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		773	coro_cctx *cctx = coro->cctx;
		774
		775	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		776	{
		777	PERL_ASYNC_CHECK ();
		778
		779	if (cctx->flags & CC_TRACE_ALL)
		780	{
		781	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		782	{
		783	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		784	SV **bot, **top;
		785	AV *av = newAV (); /* return values */
		786	SV **cb;
		787	dSP;
		788
		789	GV *gv = CvGV (cx->blk_sub.cv);
		790	SV *fullname = sv_2mortal (newSV (0));
		791	if (isGV (gv))
		792	gv_efullname3 (fullname, gv, 0);
		793
		794	bot = PL_stack_base + cx->blk_oldsp + 1;
		795	top = cx->blk_gimme == G_ARRAY ? SP + 1
		796	: cx->blk_gimme == G_SCALAR ? bot + 1
		797	: bot;
		798
		799	av_extend (av, top - bot);
		800	while (bot < top)
		801	av_push (av, SvREFCNT_inc (*bot++));
		802
		803	PL_runops = RUNOPS_DEFAULT;
		804	ENTER;
		805	SAVETMPS;
		806	EXTEND (SP, 3);
		807	PUSHMARK (SP);
		808	PUSHs (&PL_sv_no);
		809	PUSHs (fullname);
		810	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		811	PUTBACK;
		812	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		813	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		814	SPAGAIN;
		815	FREETMPS;
		816	LEAVE;
		817	PL_runops = runops_trace;
		818	}
		819
		820	if (oldcop != PL_curcop)
		821	{
		822	oldcop = PL_curcop;
		823
		824	if (PL_curcop != &PL_compiling)
		825	{
		826	SV **cb;
		827
		828	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		829	{
		830	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		831
		832	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		833	{
		834	runops_proc_t old_runops = PL_runops;
		835	dSP;
		836	GV *gv = CvGV (cx->blk_sub.cv);
		837	SV *fullname = sv_2mortal (newSV (0));
		838
		839	if (isGV (gv))
		840	gv_efullname3 (fullname, gv, 0);
		841
		842	PL_runops = RUNOPS_DEFAULT;
		843	ENTER;
		844	SAVETMPS;
		845	EXTEND (SP, 3);
		846	PUSHMARK (SP);
		847	PUSHs (&PL_sv_yes);
		848	PUSHs (fullname);
		849	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		850	PUTBACK;
		851	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		852	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		853	SPAGAIN;
		854	FREETMPS;
		855	LEAVE;
		856	PL_runops = runops_trace;
		857	}
		858
		859	oldcxix = cxstack_ix;
		860	}
		861
		862	if (cctx->flags & CC_TRACE_LINE)
		863	{
		864	dSP;
		865
		866	PL_runops = RUNOPS_DEFAULT;
		867	ENTER;
		868	SAVETMPS;
		869	EXTEND (SP, 3);
		870	PL_runops = RUNOPS_DEFAULT;
		871	PUSHMARK (SP);
		872	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		873	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		874	PUTBACK;
		875	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		876	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		877	SPAGAIN;
		878	FREETMPS;
		879	LEAVE;
		880	PL_runops = runops_trace;
		881	}
		882	}
		883	}
		884	}
		885	}
		886
		887	TAINT_NOT;
		888	return 0;
		889	}
		890
		891	/* inject a fake call to Coro::State::_cctx_init into the execution */
		892	/* _cctx_init should be careful, as it could be called at almost any time */
		893	/* during execution of a perl program */
		894	static void NOINLINE
		895	cctx_prepare (pTHX_ coro_cctx *cctx)
		896	{
630	dSP;	897	dSP;
631	Coro__State ctx = (Coro__State)arg;	898	LOGOP myop;
632	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
633		899
634	coro_init_stacks (aTHX);	900	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		901
		902	if (cctx->flags & CC_TRACE)
		903	PL_runops = runops_trace;
		904
		905	Zero (&myop, 1, LOGOP);
		906	myop.op_next = PL_op;
		907	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		908
		909	PUSHMARK (SP);
		910	EXTEND (SP, 2);
		911	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		912	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		913	PUTBACK;
		914	PL_op = (OP *)&myop;
		915	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640	SPAGAIN;	916	SPAGAIN;
		917	}
641		918
642	if (ctx->stack)	919	/*
643	{	920	* this is a _very_ stripped down perl interpreter ;)
644	ctx->cursp = 0;	921	*/
		922	static void
		923	cctx_run (void *arg)
		924	{
		925	dTHX;
645		926
646	PUSHMARK(SP);	927	/* cctx_run is the alternative tail of transfer(), so unlock here. */
647	PUTBACK;	928	UNLOCK;
648	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649		929
650	if (SvTRUE (ERRSV))	930	/* we now skip the entersub that lead to transfer() */
651	croak (NULL);	931	PL_op = PL_op->op_next;
652	else	932
653	croak ("FATAL: CCTXT coroutine returned!");	933	/* inject a fake subroutine call to cctx_init */
		934	cctx_prepare (aTHX_ (coro_cctx *)arg);
		935
		936	/* somebody or something will hit me for both perl_run and PL_restartop */
		937	PL_restartop = PL_op;
		938	perl_run (PL_curinterp);
		939
		940	/*
		941	* If perl-run returns we assume exit() was being called or the coro
		942	* fell off the end, which seems to be the only valid (non-bug)
		943	* reason for perl_run to return. We try to exit by jumping to the
		944	* bootstrap-time "top" top_env, as we cannot restore the "main"
		945	* coroutine as Coro has no such concept
		946	*/
		947	PL_top_env = main_top_env;
		948	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		949	}
		950
		951	static coro_cctx *
		952	cctx_new ()
		953	{
		954	coro_cctx *cctx;
		955	void *stack_start;
		956	size_t stack_size;
		957
		958	++cctx_count;
		959
		960	Newz (0, cctx, 1, coro_cctx);
		961
		962	#if HAVE_MMAP
		963	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		964	/* mmap supposedly does allocate-on-write for us */
		965	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		966
		967	if (cctx->sptr != (void *)-1)
		968	{
		969	# if CORO_STACKGUARD
		970	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		971	# endif
		972	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		973	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		974	cctx->flags |= CC_MAPPED;
654	}	975	}
655	else	976	else
656	{	977	#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	}	978	{
680	}	979	cctx->ssize = coro_stacksize * (long)sizeof (long);
		980	New (0, cctx->sptr, coro_stacksize, long);
681		981
682	static void	982	if (!cctx->sptr)
683	continue_coro (void *arg)	983	{
684	{	984	perror ("FATAL: unable to allocate stack for coroutine");
685	/*	985	_exit (EXIT_FAILURE);
686	* this is a _very_ stripped down perl interpreter ;)	986	}
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690		987
691	PL_top_env = &ctx->start_env;	988	stack_start = cctx->sptr;
		989	stack_size = cctx->ssize;
		990	}
692		991
693	ctx->cursp = 0;	992	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
694	PL_op = PL_op->op_next;	993	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
695	CALLRUNOPS(aTHX);
696		994
697	abort ();	995	return cctx;
698	}	996	}
699		997
700	STATIC void	998	static void
		999	cctx_destroy (coro_cctx *cctx)
		1000	{
		1001	if (!cctx)
		1002	return;
		1003
		1004	--cctx_count;
		1005
		1006	#if CORO_USE_VALGRIND
		1007	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1008	#endif
		1009
		1010	#if HAVE_MMAP
		1011	if (cctx->flags & CC_MAPPED)
		1012	munmap (cctx->sptr, cctx->ssize);
		1013	else
		1014	#endif
		1015	Safefree (cctx->sptr);
		1016
		1017	Safefree (cctx);
		1018	}
		1019
		1020	/* wether this cctx should be destructed */
		1021	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1022
		1023	static coro_cctx *
		1024	cctx_get (pTHX)
		1025	{
		1026	while (expect_true (cctx_first))
		1027	{
		1028	coro_cctx *cctx = cctx_first;
		1029	cctx_first = cctx->next;
		1030	--cctx_idle;
		1031
		1032	if (expect_true (!CCTX_EXPIRED (cctx)))
		1033	return cctx;
		1034
		1035	cctx_destroy (cctx);
		1036	}
		1037
		1038	return cctx_new ();
		1039	}
		1040
		1041	static void
		1042	cctx_put (coro_cctx *cctx)
		1043	{
		1044	/* free another cctx if overlimit */
		1045	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1046	{
		1047	coro_cctx *first = cctx_first;
		1048	cctx_first = first->next;
		1049	--cctx_idle;
		1050
		1051	cctx_destroy (first);
		1052	}
		1053
		1054	++cctx_idle;
		1055	cctx->next = cctx_first;
		1056	cctx_first = cctx;
		1057	}
		1058
		1059	/** coroutine switching *****************************************************/
		1060
		1061	static void
		1062	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1063	{
		1064	if (expect_true (prev != next))
		1065	{
		1066	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1067	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1068
		1069	if (expect_false (next->flags & CF_RUNNING))
		1070	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1071
		1072	if (expect_false (next->flags & CF_DESTROYED))
		1073	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1074
		1075	if (
		1076	#if PERL_VERSION_ATLEAST (5,9,0)
		1077	expect_false (PL_parser)
		1078	#else
		1079	expect_false (PL_lex_state != LEX_NOTPARSING)
		1080	#endif
		1081	)
		1082	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1083	}
		1084	}
		1085
		1086	/* always use the TRANSFER macro */
		1087	static void NOINLINE
701	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	1088	transfer (pTHX_ struct coro *prev, struct coro *next)
702	{	1089	{
703	dSTACKLEVEL;	1090	dSTACKLEVEL;
704		1091
705	if (prev != next)	1092	/* sometimes transfer is only called to set idle_sp */
		1093	if (expect_false (!next))
		1094	{
		1095	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1096	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
706	{	1097	}
707	if (next->mainstack)	1098	else if (expect_true (prev != next))
		1099	{
		1100	coro_cctx *prev__cctx;
		1101
		1102	if (expect_false (prev->flags & CF_NEW))
708	{	1103	{
709	LOCK;	1104	/* create a new empty context */
710	SAVE (prev, flags);	1105	Newz (0, prev->cctx, 1, coro_cctx);
711	LOAD (next);	1106	prev->flags &= ~CF_NEW;
712	UNLOCK;	1107	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	}	1108	}
747	else if (next->tmps_ix == -2)	1109
748	croak ("tried to transfer to running coroutine");	1110	prev->flags &= ~CF_RUNNING;
		1111	next->flags |= CF_RUNNING;
		1112
		1113	LOCK;
		1114
		1115	if (expect_false (next->flags & CF_NEW))
		1116	{
		1117	/* need to start coroutine */
		1118	next->flags &= ~CF_NEW;
		1119	/* first get rid of the old state */
		1120	save_perl (aTHX_ prev);
		1121	/* setup coroutine call */
		1122	coro_setup (aTHX_ next);
		1123	}
749	else	1124	else
750	{	1125	{
751	LOCK;	1126	/* coroutine already started */
752	SAVE (prev, -1); /* first get rid of the old state */	1127	save_perl (aTHX_ prev);
		1128	load_perl (aTHX_ next);
		1129	}
		1130
		1131	prev__cctx = prev->cctx;
		1132
		1133	/* possibly "free" the cctx */
		1134	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1135	{
		1136	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1137	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1138
		1139	prev->cctx = 0;
		1140
		1141	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1142	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1143	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1144	if (!next->cctx)
		1145	next->cctx = cctx_get (aTHX);
		1146
		1147	cctx_put (prev__cctx);
		1148	}
		1149
		1150	++next->usecount;
		1151
		1152	if (expect_true (!next->cctx))
		1153	next->cctx = cctx_get (aTHX);
		1154
		1155	if (expect_false (prev__cctx != next->cctx))
		1156	{
		1157	prev__cctx->top_env = PL_top_env;
		1158	PL_top_env = next->cctx->top_env;
		1159	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1160	}
		1161
		1162	free_coro_mortal (aTHX);
753	UNLOCK;	1163	UNLOCK;
754		1164
755	if (flags & TRANSFER_SAVE_CCTXT)	1165	if (expect_false (prev->throw || next->throw))
		1166	{
		1167	struct coro *coro = SvSTATE (coro_current);
		1168
		1169	if (coro->throw)
756	{	1170	{
757	if (!prev->stack)	1171	SV *exception = coro->throw;
758	allocate_stack (prev, 0);	1172	coro->throw = 0;
759		1173	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);	1174	croak (0);
787	next->cursp = stacklevel;
788	}	1175	}
789	}	1176	}
790	}	1177	}
		1178	}
791		1179
792	LOCK;	1180	struct transfer_args
793	if (coro_mortal)	1181	{
794	{	1182	struct coro *prev, *next;
795	SvREFCNT_dec (coro_mortal);	1183	};
796	coro_mortal = 0;	1184
		1185	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1186	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1187
		1188	/** high level stuff ********************************************************/
		1189
		1190	static int
		1191	coro_state_destroy (pTHX_ struct coro *coro)
		1192	{
		1193	if (coro->flags & CF_DESTROYED)
		1194	return 0;
		1195
		1196	coro->flags |= CF_DESTROYED;
		1197
		1198	if (coro->flags & CF_READY)
797	}	1199	{
		1200	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1201	/* alternative: look through all ready queues and remove the coro */
		1202	LOCK;
		1203	--coro_nready;
798	UNLOCK;	1204	UNLOCK;
799	}	1205	}
		1206	else
		1207	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
800		1208
801	#define SV_CORO(sv,func) \	1209	if (coro->mainstack && coro->mainstack != main_mainstack)
802	do { \	1210	{
803	if (SvROK (sv)) \	1211	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		1212
822	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1213	if (coro->flags & CF_RUNNING)
		1214	croak ("FATAL: tried to destroy currently running coroutine");
823		1215
		1216	save_perl (aTHX_ &temp);
		1217	load_perl (aTHX_ coro);
		1218
		1219	coro_destroy (aTHX_ coro);
		1220
		1221	load_perl (aTHX_ &temp);
		1222
		1223	coro->slot = 0;
		1224	}
		1225
		1226	cctx_destroy (coro->cctx);
		1227	SvREFCNT_dec (coro->args);
		1228
		1229	if (coro->next) coro->next->prev = coro->prev;
		1230	if (coro->prev) coro->prev->next = coro->next;
		1231	if (coro == coro_first) coro_first = coro->next;
		1232
		1233	return 1;
		1234	}
		1235
824	static void	1236	static int
		1237	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1238	{
		1239	struct coro *coro = (struct coro *)mg->mg_ptr;
		1240	mg->mg_ptr = 0;
		1241
		1242	coro->hv = 0;
		1243
		1244	if (--coro->refcnt < 0)
		1245	{
		1246	coro_state_destroy (aTHX_ coro);
		1247	Safefree (coro);
		1248	}
		1249
		1250	return 0;
		1251	}
		1252
		1253	static int
		1254	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1255	{
		1256	struct coro *coro = (struct coro *)mg->mg_ptr;
		1257
		1258	++coro->refcnt;
		1259
		1260	return 0;
		1261	}
		1262
		1263	static MGVTBL coro_state_vtbl = {
		1264	0, 0, 0, 0,
		1265	coro_state_free,
		1266	0,
		1267	#ifdef MGf_DUP
		1268	coro_state_dup,
		1269	#else
		1270	# define MGf_DUP 0
		1271	#endif
		1272	};
		1273
		1274	static void
		1275	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1276	{
		1277	ta->prev = SvSTATE (prev_sv);
		1278	ta->next = SvSTATE (next_sv);
		1279	TRANSFER_CHECK (*ta);
		1280	}
		1281
		1282	static void
825	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1283	api_transfer (SV *prev_sv, SV *next_sv)
826	{	1284	{
827	SV_CORO (prev, "Coro::transfer");	1285	dTHX;
828	SV_CORO (next, "Coro::transfer");	1286	struct transfer_args ta;
829		1287
830	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1288	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1289	TRANSFER (ta);
831	}	1290	}
832		1291
833	/** Coro ********************************************************************/	1292	/** Coro ********************************************************************/
834		1293
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	1294	static void
848	coro_enq (SV *sv)	1295	coro_enq (pTHX_ SV *coro_sv)
849	{	1296	{
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);	1297	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	}	1298	}
867		1299
868	static SV *	1300	static SV *
869	coro_deq (int min_prio)	1301	coro_deq (pTHX_ int min_prio)
870	{	1302	{
871	int prio = PRIO_MAX - PRIO_MIN;	1303	int prio = PRIO_MAX - PRIO_MIN;
872		1304
873	min_prio -= PRIO_MIN;	1305	min_prio -= PRIO_MIN;
874	if (min_prio < 0)	1306	if (min_prio < 0)
875	min_prio = 0;	1307	min_prio = 0;
876		1308
877	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1309	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
878	if (av_len (coro_ready[prio]) >= 0)	1310	if (AvFILLp (coro_ready [prio]) >= 0)
879	{
880	coro_nready--;
881	return av_shift (coro_ready[prio]);	1311	return av_shift (coro_ready [prio]);
882	}
883		1312
884	return 0;	1313	return 0;
885	}	1314	}
886		1315
887	static void	1316	static int
888	api_ready (SV *coro)	1317	api_ready (SV *coro_sv)
889	{	1318	{
		1319	dTHX;
		1320	struct coro *coro;
		1321
890	if (SvROK (coro))	1322	if (SvROK (coro_sv))
891	coro = SvRV (coro);	1323	coro_sv = SvRV (coro_sv);
		1324
		1325	coro = SvSTATE (coro_sv);
		1326
		1327	if (coro->flags & CF_READY)
		1328	return 0;
		1329
		1330	coro->flags |= CF_READY;
892		1331
893	LOCK;	1332	LOCK;
894	coro_enq (SvREFCNT_inc (coro));	1333	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1334	++coro_nready;
895	UNLOCK;	1335	UNLOCK;
		1336
		1337	return 1;
		1338	}
		1339
		1340	static int
		1341	api_is_ready (SV *coro_sv)
		1342	{
		1343	dTHX;
		1344	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1345	}
		1346
		1347	static void
		1348	prepare_schedule (pTHX_ struct transfer_args *ta)
		1349	{
		1350	SV *prev_sv, *next_sv;
		1351
		1352	for (;;)
		1353	{
		1354	LOCK;
		1355	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1356
		1357	/* nothing to schedule: call the idle handler */
		1358	if (expect_false (!next_sv))
		1359	{
		1360	dSP;
		1361	UNLOCK;
		1362
		1363	ENTER;
		1364	SAVETMPS;
		1365
		1366	PUSHMARK (SP);
		1367	PUTBACK;
		1368	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1369
		1370	FREETMPS;
		1371	LEAVE;
		1372	continue;
		1373	}
		1374
		1375	ta->next = SvSTATE (next_sv);
		1376
		1377	/* cannot transfer to destroyed coros, skip and look for next */
		1378	if (expect_false (ta->next->flags & CF_DESTROYED))
		1379	{
		1380	UNLOCK;
		1381	SvREFCNT_dec (next_sv);
		1382	/* coro_nready is already taken care of by destroy */
		1383	continue;
		1384	}
		1385
		1386	--coro_nready;
		1387	UNLOCK;
		1388	break;
		1389	}
		1390
		1391	/* free this only after the transfer */
		1392	prev_sv = SvRV (coro_current);
		1393	ta->prev = SvSTATE (prev_sv);
		1394	TRANSFER_CHECK (*ta);
		1395	assert (ta->next->flags & CF_READY);
		1396	ta->next->flags &= ~CF_READY;
		1397	SvRV_set (coro_current, next_sv);
		1398
		1399	LOCK;
		1400	free_coro_mortal (aTHX);
		1401	coro_mortal = prev_sv;
		1402	UNLOCK;
		1403	}
		1404
		1405	static void
		1406	prepare_cede (pTHX_ struct transfer_args *ta)
		1407	{
		1408	api_ready (coro_current);
		1409	prepare_schedule (aTHX_ ta);
		1410	}
		1411
		1412	static int
		1413	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1414	{
		1415	if (coro_nready)
		1416	{
		1417	SV *prev = SvRV (coro_current);
		1418	prepare_schedule (aTHX_ ta);
		1419	api_ready (prev);
		1420	return 1;
		1421	}
		1422	else
		1423	return 0;
896	}	1424	}
897		1425
898	static void	1426	static void
899	api_schedule (void)	1427	api_schedule (void)
900	{	1428	{
901	SV *prev, *next;	1429	dTHX;
		1430	struct transfer_args ta;
902		1431
903	LOCK;	1432	prepare_schedule (aTHX_ &ta);
904		1433	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	}	1434	}
924		1435
925	static void	1436	static int
926	api_cede (void)	1437	api_cede (void)
927	{	1438	{
928	LOCK;	1439	dTHX;
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1440	struct transfer_args ta;
930	UNLOCK;
931		1441
932	api_schedule ();	1442	prepare_cede (aTHX_ &ta);
933	}
934		1443
		1444	if (expect_true (ta.prev != ta.next))
		1445	{
		1446	TRANSFER (ta);
		1447	return 1;
		1448	}
		1449	else
		1450	return 0;
		1451	}
		1452
		1453	static int
		1454	api_cede_notself (void)
		1455	{
		1456	dTHX;
		1457	struct transfer_args ta;
		1458
		1459	if (prepare_cede_notself (aTHX_ &ta))
		1460	{
		1461	TRANSFER (ta);
		1462	return 1;
		1463	}
		1464	else
		1465	return 0;
		1466	}
		1467
		1468	static void
		1469	api_trace (SV *coro_sv, int flags)
		1470	{
		1471	dTHX;
		1472	struct coro *coro = SvSTATE (coro_sv);
		1473
		1474	if (flags & CC_TRACE)
		1475	{
		1476	if (!coro->cctx)
		1477	coro->cctx = cctx_new ();
		1478	else if (!(coro->cctx->flags & CC_TRACE))
		1479	croak ("cannot enable tracing on coroutine with custom stack");
		1480
		1481	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1482	}
		1483	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1484	{
		1485	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1486
		1487	if (coro->flags & CF_RUNNING)
		1488	PL_runops = RUNOPS_DEFAULT;
		1489	else
		1490	coro->slot->runops = RUNOPS_DEFAULT;
		1491	}
		1492	}
		1493
935	MODULE = Coro::State PACKAGE = Coro::State	1494	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936		1495
937	PROTOTYPES: ENABLE	1496	PROTOTYPES: DISABLE
938		1497
939	BOOT:	1498	BOOT:
940	{ /* {} necessary for stoopid perl-5.6.x */	1499	{
941	#ifdef USE_ITHREADS	1500	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1501	MUTEX_INIT (&coro_mutex);
943	#endif	1502	#endif
		1503	BOOT_PAGESIZE;
944		1504
945	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1505	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
946	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1506	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1507
		1508	hv_sig = coro_get_hv ("SIG", TRUE);
		1509	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1510	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1511
		1512	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1513	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1514
947	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1515	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
948		1516
949	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
950	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
951	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
952	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
953		1521
954	main_mainstack = PL_mainstack;	1522	main_mainstack = PL_mainstack;
		1523	main_top_env = PL_top_env;
		1524
		1525	while (main_top_env->je_prev)
		1526	main_top_env = main_top_env->je_prev;
955		1527
956	coroapi.ver = CORO_API_VERSION;	1528	coroapi.ver = CORO_API_VERSION;
957	coroapi.transfer = api_transfer;	1529	coroapi.transfer = api_transfer;
958	}
959		1530
960	Coro::State	1531	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	_newprocess(args)	1532	}
962	SV * args	1533
963	PROTOTYPE: $	1534	SV *
		1535	new (char *klass, ...)
964	CODE:	1536	CODE:
965	Coro__State coro;	1537	{
		1538	struct coro *coro;
		1539	HV *hv;
		1540	int i;
966		1541
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);	1542	Newz (0, coro, 1, struct coro);
		1543	coro->args = newAV ();
		1544	coro->flags = CF_NEW;
971		1545
972	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1546	if (coro_first) coro_first->prev = coro;
973	coro->mainstack = 0; /* actual work is done inside transfer */	1547	coro->next = coro_first;
974	coro->stack = 0;	1548	coro_first = coro;
975		1549
976	/* same as JMPENV_BOOTSTRAP */	1550	coro->hv = hv = newHV ();
977	/* we might be able to recycle start_env, but safe is safe */	1551	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
978	//Zero(&coro->start_env, 1, JMPENV);	1552	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		1553
982	RETVAL = coro;	1554	av_extend (coro->args, items - 1);
		1555	for (i = 1; i < items; i++)
		1556	av_push (coro->args, newSVsv (ST (i)));
		1557	}
983	OUTPUT:	1558	OUTPUT:
984	RETVAL	1559	RETVAL
985		1560
		1561	# these not obviously related functions are all rolled into the same xs
		1562	# function to increase chances that they all will call transfer with the same
		1563	# stack offset
986	void	1564	void
987	transfer(prev, next, flags)	1565	_set_stacklevel (...)
988	SV *prev	1566	ALIAS:
989	SV *next	1567	Coro::State::transfer = 1
990	int flags	1568	Coro::schedule = 2
991	PROTOTYPE: @	1569	Coro::cede = 3
		1570	Coro::cede_notself = 4
992	CODE:	1571	CODE:
993	PUTBACK;	1572	{
994	SV_CORO (next, "Coro::transfer");	1573	struct transfer_args ta;
995	SV_CORO (prev, "Coro::transfer");	1574
996	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1575	switch (ix)
997	SPAGAIN;	1576	{
		1577	case 0:
		1578	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1579	ta.next = 0;
		1580	break;
		1581
		1582	case 1:
		1583	if (items != 2)
		1584	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1585
		1586	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1587	break;
		1588
		1589	case 2:
		1590	prepare_schedule (aTHX_ &ta);
		1591	break;
		1592
		1593	case 3:
		1594	prepare_cede (aTHX_ &ta);
		1595	break;
		1596
		1597	case 4:
		1598	if (!prepare_cede_notself (aTHX_ &ta))
		1599	XSRETURN_EMPTY;
		1600
		1601	break;
		1602	}
		1603
		1604	BARRIER;
		1605	TRANSFER (ta);
		1606
		1607	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1608	XSRETURN_YES;
		1609	}
		1610
		1611	bool
		1612	_destroy (SV *coro_sv)
		1613	CODE:
		1614	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1615	OUTPUT:
		1616	RETVAL
998		1617
999	void	1618	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)	1619	_exit (code)
1027	int code	1620	int code
1028	PROTOTYPE: $	1621	PROTOTYPE: $
1029	CODE:	1622	CODE:
1030	_exit (code);	1623	_exit (code);
1031		1624
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1625	int
		1626	cctx_stacksize (int new_stacksize = 0)
		1627	CODE:
		1628	RETVAL = coro_stacksize;
		1629	if (new_stacksize)
		1630	coro_stacksize = new_stacksize;
		1631	OUTPUT:
		1632	RETVAL
1033		1633
1034	# this is slightly dirty (should expose a c-level api)	1634	int
		1635	cctx_count ()
		1636	CODE:
		1637	RETVAL = cctx_count;
		1638	OUTPUT:
		1639	RETVAL
		1640
		1641	int
		1642	cctx_idle ()
		1643	CODE:
		1644	RETVAL = cctx_idle;
		1645	OUTPUT:
		1646	RETVAL
1035		1647
1036	void	1648	void
1037	yield(...)	1649	list ()
1038	PROTOTYPE: @	1650	PPCODE:
		1651	{
		1652	struct coro *coro;
		1653	for (coro = coro_first; coro; coro = coro->next)
		1654	if (coro->hv)
		1655	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1656	}
		1657
		1658	void
		1659	call (Coro::State coro, SV *coderef)
		1660	ALIAS:
		1661	eval = 1
		1662	CODE:
		1663	{
		1664	if (coro->mainstack)
		1665	{
		1666	struct coro temp;
		1667
		1668	if (!(coro->flags & CF_RUNNING))
		1669	{
		1670	save_perl (aTHX_ &temp);
		1671	load_perl (aTHX_ coro);
		1672	}
		1673
		1674	{
		1675	dSP;
		1676	ENTER;
		1677	SAVETMPS;
		1678	PUSHMARK (SP);
		1679	PUTBACK;
		1680
		1681	if (ix)
		1682	eval_sv (coderef, 0);
		1683	else
		1684	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1685
		1686	SPAGAIN;
		1687	FREETMPS;
		1688	LEAVE;
		1689	PUTBACK;
		1690	}
		1691
		1692	if (!(coro->flags & CF_RUNNING))
		1693	{
		1694	save_perl (aTHX_ coro);
		1695	load_perl (aTHX_ &temp);
		1696	}
		1697	}
		1698	}
		1699
		1700	SV *
		1701	is_ready (Coro::State coro)
		1702	PROTOTYPE: $
		1703	ALIAS:
		1704	is_ready = CF_READY
		1705	is_running = CF_RUNNING
		1706	is_new = CF_NEW
		1707	is_destroyed = CF_DESTROYED
		1708	CODE:
		1709	RETVAL = boolSV (coro->flags & ix);
		1710	OUTPUT:
		1711	RETVAL
		1712
		1713	void
		1714	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1715
		1716	SV *
		1717	has_stack (Coro::State coro)
		1718	PROTOTYPE: $
		1719	CODE:
		1720	RETVAL = boolSV (!!coro->cctx);
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	int
		1725	is_traced (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	IV
		1733	rss (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	usecount = 1
1039	CODE:	1737	CODE:
1040	static SV *returnstk;	1738	switch (ix)
1041	SV *sv;	1739	{
1042	AV *defav = GvAV (PL_defgv);	1740	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1043	struct coro *prev, *next;	1741	case 1: RETVAL = coro->usecount; break;
		1742	}
		1743	OUTPUT:
		1744	RETVAL
1044		1745
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		1746
1062	MODULE = Coro::State PACKAGE = Coro	1747	MODULE = Coro::State PACKAGE = Coro
1063		1748
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1749	BOOT:
1067	{	1750	{
1068	int i;	1751	int i;
		1752
		1753	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1754	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1755	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1756
		1757	coro_current = coro_get_sv ("Coro::current", FALSE);
		1758	SvREADONLY_on (coro_current);
		1759
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1760	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1761
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1762	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1763	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1764	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1765	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1766	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1767	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		1768
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1769	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1770	coro_ready[i] = newAV ();
1083		1771
1084	{	1772	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1773	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1774	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1086		1775
1087	coroapi.schedule = api_schedule;	1776	coroapi.schedule = api_schedule;
1088	coroapi.cede = api_cede;	1777	coroapi.cede = api_cede;
		1778	coroapi.cede_notself = api_cede_notself;
1089	coroapi.ready = api_ready;	1779	coroapi.ready = api_ready;
		1780	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1781	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1782	coroapi.current = coro_current;
1092		1783
1093	GCoroAPI = &coroapi;	1784	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1785	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1786	SvREADONLY_on (sv);
1096	}	1787	}
1097	}	1788	}
1098		1789
1099	#if !PERL_MICRO
1100
1101	void	1790	void
1102	ready(self)	1791	_set_current (SV *current)
1103	SV * self
1104	PROTOTYPE: $	1792	PROTOTYPE: $
1105	CODE:	1793	CODE:
1106	api_ready (self);	1794	SvREFCNT_dec (SvRV (coro_current));
1107		1795	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1108	#endif
1109		1796
1110	int	1797	int
		1798	prio (Coro::State coro, int newprio = 0)
		1799	ALIAS:
		1800	nice = 1
		1801	CODE:
		1802	{
		1803	RETVAL = coro->prio;
		1804
		1805	if (items > 1)
		1806	{
		1807	if (ix)
		1808	newprio = coro->prio - newprio;
		1809
		1810	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1811	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1812
		1813	coro->prio = newprio;
		1814	}
		1815	}
		1816	OUTPUT:
		1817	RETVAL
		1818
		1819	SV *
		1820	ready (SV *self)
		1821	PROTOTYPE: $
		1822	CODE:
		1823	RETVAL = boolSV (api_ready (self));
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	int
1111	nready(...)	1828	nready (...)
1112	PROTOTYPE:	1829	PROTOTYPE:
1113	CODE:	1830	CODE:
1114	RETVAL = coro_nready;	1831	RETVAL = coro_nready;
1115	OUTPUT:	1832	OUTPUT:
1116	RETVAL	1833	RETVAL
1117		1834
1118	void	1835	void
1119	schedule(...)	1836	throw (Coro::State self, SV *throw = &PL_sv_undef)
1120	PROTOTYPE:	1837	PROTOTYPE: $;$
		1838	CODE:
		1839	SvREFCNT_dec (self->throw);
		1840	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1841
		1842	# for async_pool speedup
		1843	void
		1844	_pool_1 (SV *cb)
1121	CODE:	1845	CODE:
1122	api_schedule ();	1846	{
		1847	struct coro *coro = SvSTATE (coro_current);
		1848	HV *hv = (HV *)SvRV (coro_current);
		1849	AV *defav = GvAV (PL_defgv);
		1850	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1851	AV *invoke_av;
		1852	int i, len;
		1853
		1854	if (!invoke)
		1855	croak ("\3async_pool terminate\2\n");
		1856
		1857	SvREFCNT_dec (coro->saved_deffh);
		1858	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1859
		1860	hv_store (hv, "desc", sizeof ("desc") - 1,
		1861	newSVpvn (strpair ("[async_pool]")), 0);
		1862
		1863	invoke_av = (AV *)SvRV (invoke);
		1864	len = av_len (invoke_av);
		1865
		1866	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1867
		1868	if (len > 0)
		1869	{
		1870	av_fill (defav, len - 1);
		1871	for (i = 0; i < len; ++i)
		1872	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1873	}
		1874
		1875	SvREFCNT_dec (invoke);
		1876	}
1123		1877
1124	void	1878	void
1125	cede(...)	1879	_pool_2 (SV *cb)
1126	PROTOTYPE:
1127	CODE:	1880	CODE:
1128	api_cede ();	1881	{
		1882	struct coro *coro = SvSTATE (coro_current);
1129		1883
		1884	sv_setsv (cb, &PL_sv_undef);
		1885
		1886	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1887	coro->saved_deffh = 0;
		1888
		1889	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1890	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1891	croak ("\3async_pool terminate\2\n");
		1892
		1893	av_clear (GvAV (PL_defgv));
		1894	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1895	newSVpvn (strpair ("[async_pool idle]")), 0);
		1896
		1897	coro->prio = 0;
		1898
		1899	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1900	api_trace (coro_current, 0);
		1901
		1902	av_push (av_async_pool, newSVsv (coro_current));
		1903	}
		1904
		1905
		1906	MODULE = Coro::State PACKAGE = Coro::AIO
		1907
		1908	SV *
		1909	_get_state ()
		1910	CODE:
		1911	{
		1912	struct io_state *data;
		1913
		1914	RETVAL = newSV (sizeof (struct io_state));
		1915	data = (struct io_state *)SvPVX (RETVAL);
		1916	SvCUR_set (RETVAL, sizeof (struct io_state));
		1917	SvPOK_only (RETVAL);
		1918
		1919	data->errorno = errno;
		1920	data->laststype = PL_laststype;
		1921	data->laststatval = PL_laststatval;
		1922	data->statcache = PL_statcache;
		1923	}
		1924	OUTPUT:
		1925	RETVAL
		1926
		1927	void
		1928	_set_state (char *data_)
		1929	PROTOTYPE: $
		1930	CODE:
		1931	{
		1932	struct io_state *data = (void *)data_;
		1933
		1934	errno = data->errorno;
		1935	PL_laststype = data->laststype;
		1936	PL_laststatval = data->laststatval;
		1937	PL_statcache = data->statcache;
		1938	}
		1939

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