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Comparing Coro/Coro/State.xs (file contents):
Revision 1.64 by root, Mon Mar 21 15:06:51 2005 UTC vs.
Revision 1.207 by root, Tue Oct 9 22:29:27 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if 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)
12	# ifndef PL_ppaddr	56	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	57	# define PL_ppaddr ppaddr
14	# endif	58	# endif
15	# ifndef call_sv	59	# ifndef call_sv
16	# define call_sv perl_call_sv	60	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	71	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	72	# define IS_PADCONST(v) 0
29	# endif	73	# endif
30	#endif	74	#endif
31		75
32	#include <signal.h>	76	/* 5.8.7 */
33		77	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	78	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	79	#endif
44	#endif
45		80
46	#define SUB_INIT "Coro::State::initialize"	81	/* 5.8.8 */
47	#define UCORO_STATE "_coro_state"	82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
48		88
49	/* The next macro should declare a variable stacklevel that contains and approximation	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
50	* to the current C stack pointer. Its property is that it changes with each call	90	# undef CORO_STACKGUARD
51	* and should be unique. */	91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
		104	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
53		106
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		108
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
57		123
58	#include "CoroAPI.h"	124	#include "CoroAPI.h"
59		125
60	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	130	#else
65	# define LOCK 0	131	# define LOCK (void)0
66	# define UNLOCK 0	132	# define UNLOCK (void)0
67	#endif	133	#endif
68		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
		138	struct io_state
		139	{
		140	int errorno;
		141	I32 laststype;
		142	int laststatval;
		143	Stat_t statcache;
		144	};
		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	148	static AV *main_mainstack; /* used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	150	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	151	static SV *coro_mortal; /* will be freed after next transfer */
75		152
76	/* this is actually not only the c stack but also c registers etc... */	153	static GV *irsgv; /* $/ */
		154	static GV *stdoutgv; /* *STDOUT */
		155
		156	static HV *hv_sig; /* %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
		165	static struct coro_cctx *cctx_first;
		166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		175	};
		176
		177	/* this is a structure representing a c-level coroutine */
		178	typedef struct coro_cctx {
		179	struct coro_cctx *next;
		180
		181	/* the stack */
		182	void *sptr;
		183	size_t ssize;
		184
		185	/* cpu state */
		186	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		187	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		188	JMPENV *top_env;
		189	coro_context cctx;
		190
		191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
		196
		197	enum {
		198	CF_RUNNING = 0x0001, /* coroutine is running */
		199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
77	typedef struct {	205	typedef struct {
78	int refcnt; /* pointer reference counter */	206	SV *defsv;
79	int usecnt; /* shared by how many coroutines */	207	AV *defav;
80	int gencnt; /* generation counter */	208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
81		214
82	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83		216
84	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
85	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87
88	struct coro {	218	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	219	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	220	coro_cctx *cctx;
91		221
92	/* the optional C context */	222	/* process data */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;	223	AV *mainstack;
110	SV **stack_sp;	224	perl_slots *slot; /* basically the saved sp */
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	COP *curcop;
134	JMPENV *top_env;
135		225
136	/* data associated with this coroutine (initial args) */	226	AV *args; /* data associated with this coroutine (initial args) */
137	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;
138	};	243	};
139		244
140	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
142		247
143	/* mostly copied from op.c:cv_clone2 */	248	/** Coro ********************************************************************/
144	STATIC AV *	249
145	clone_padlist (pTHX_ AV *protopadlist)	250	#define PRIO_MAX 3
		251	#define PRIO_HIGH 1
		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)
146	{	267	{
147	AV *av;	268	#if PERL_VERSION_ATLEAST (5,9,0)
148	I32 ix;	269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	270	get_sv (name, create);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	271	#endif
151	SV **pname = AvARRAY (protopad_name);	272	return get_sv (name, create);
152	SV **ppad = AvARRAY (protopad);	273	}
153	I32 fname = AvFILLp (protopad_name);	274
154	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);
155	AV *newpadlist, *newpad_name, *newpad;	299	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		300
166	newpadlist = newAV ();	301	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	302	AvREAL_off (newpadlist);
168	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)));
169	av_store (newpadlist, 1, (SV *) newpad);	312	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		313
240	return newpadlist;	314	return newpadlist;
241	}	315	}
242		316
243	STATIC void	317	static void
244	free_padlist (pTHX_ AV *padlist)	318	free_padlist (pTHX_ AV *padlist)
245	{	319	{
246	/* may be during global destruction */	320	/* may be during global destruction */
247	if (SvREFCNT (padlist))	321	if (SvREFCNT (padlist))
248	{	322	{
…		…
262		336
263	SvREFCNT_dec ((SV*)padlist);	337	SvREFCNT_dec ((SV*)padlist);
264	}	338	}
265	}	339	}
266		340
267	STATIC int	341	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	342	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	343	{
270	AV *padlist;	344	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	345	AV *av = (AV *)mg->mg_obj;
272		346
273	/* casting is fun. */	347	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	348	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	349	free_padlist (aTHX_ padlist);
276		350
277	SvREFCNT_dec (av);	351	SvREFCNT_dec (av);
		352
		353	return 0;
278	}	354	}
279		355
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	356	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		357
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	358	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		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
284	/* the next two functions merely cache the padlists */	393	/* the next two functions merely cache the padlists */
285	STATIC void	394	static void
286	get_padlist (pTHX_ CV *cv)	395	get_padlist (pTHX_ CV *cv)
287	{	396	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	397	MAGIC *mg = CORO_MAGIC (cv);
		398	AV *av;
289		399
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	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
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		412	#endif
		413	}
294	}	414	}
295		415
296	STATIC void	416	static void
297	put_padlist (pTHX_ CV *cv)	417	put_padlist (pTHX_ CV *cv)
298	{	418	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	419	MAGIC *mg = CORO_MAGIC (cv);
		420	AV *av;
300		421
301	if (!mg)	422	if (expect_false (!mg))
302	{	423	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	426	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	427	mg->mg_obj = (SV *)newAV ();
307	}	428	}
308		429
309	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	430	av = (AV *)mg->mg_obj;
310	}
311		431
312	#define SB do {	432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
313	#define SE } while (0)	433	av_extend (av, AvMAX (av) + 1);
314		434
315	#define LOAD(state) load_state(aTHX_ (state));	435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	436	}
317		437
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	438	/** load & save, init *******************************************************/
319		439
320	static void	440	static void
321	load_state(pTHX_ Coro__State c)	441	load_perl (pTHX_ Coro__State c)
322	{	442	{
323	PL_dowarn = c->dowarn;	443	perl_slots *slot = c->slot;
324	PL_in_eval = c->in_eval;	444	c->slot = 0;
325		445
326	PL_curstackinfo = c->curstackinfo;
327	PL_curstack = c->curstack;
328	PL_mainstack = c->mainstack;	446	PL_mainstack = c->mainstack;
329	PL_stack_sp = c->stack_sp;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		447
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	448	GvSV (PL_defgv) = slot->defsv;
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	449	GvAV (PL_defgv) = slot->defav;
357	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);*/
358		459
359	{	460	{
360	dSP;	461	dSP;
		462
361	CV *cv;	463	CV *cv;
362		464
363	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
365	{	467	{
366	AV *padlist = (AV *)POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
372	}	470	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	471	}
376		472
377	PUTBACK;	473	PUTBACK;
378	}	474	}
379	}	475	}
380		476
381	static void	477	static void
382	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
383	{	479	{
384	{	480	{
385	dSP;	481	dSP;
386	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
390	/*	486	/*
391	* 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
392	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
393	*/	489	*/
394		490
395	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
397	for (;;)	493	for (;;)
398	{	494	{
399	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
400	{	496	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
402		498
403	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
404	{	500	{
405	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
406	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
407	{	504	{
408	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
419		509
		510	CvDEPTH (cv) = 0;
420	get_padlist (aTHX_ cv); /* this is a monster */	511	get_padlist (aTHX_ cv);
421	}	512	}
422	}	513	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	514	}
432		515
433	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
434	break;	517	break;
435		518
436	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
437	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
438	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
439	}	522	}
440		523
441	PUTBACK;	524	PUTBACK;
442	}	525	}
443		526
444	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
446	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 */
447		538
448	c->dowarn = PL_dowarn;
449	c->in_eval = PL_in_eval;
450
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;	540
455	c->op = PL_op;	541	{
456	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
457	c->comppad = PL_comppad;	543
458	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
459	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
460	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
461	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
462	c->tmps_floor = PL_tmps_floor;	548
463	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
464	c->tmps_max = PL_tmps_max;	550	# include "state.h"
465	c->markstack = PL_markstack;	551	#undef VAR
466	c->markstack_ptr = PL_markstack_ptr;	552	}
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	553	}
480		554
481	/*	555	/*
482	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
486	*/	560	*/
487	STATIC void	561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
		564	static void
488	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
489	{	566	{
490	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		571
497	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		575
501	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
502	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	579	PL_tmps_max = 32;
505		580
506	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
507	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
509		584
510	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
511	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
512	#endif	587	#endif
513		588
514	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
515	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
517		592
518	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
519	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	595	PL_savestack_max = 24;
521		596
		597	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
523	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	600	PL_retstack_max = 4;
525		601	#endif
526	UNLOCK;
527	}	602	}
		603	#endif
528		604
529	/*	605	/*
530	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
531	*/	607	*/
532	STATIC void	608	static void
533	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
534	{	610	{
535	if (!IN_DESTRUCT)
536	{
537	/* is this ugly, I ask? */
538	LEAVE_SCOPE (0);
539
540	/* sure it is, but more important: is it correct?? :/ */
541	FREETMPS;
542
543	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
544	}
545
546	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
548		613
549	while (PL_curstackinfo)	614	while (PL_curstackinfo)
550	{	615	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
552		617
553	{ /*D*//*remove*/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/*D*//*remove*/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		620
565	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	623	PL_curstackinfo = p;
568	}	624	}
569		625
570	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	627	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	629	Safefree (PL_savestack);
		630	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	631	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	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)
595	{	646	{
596	/*FIXME*//*D*//* reasonable stack size! */	647	slot = &tmp_slot;
597	stack->ssize = - (8192 * sizeof (long));	648
598	New (0, stack->sptr, 8192, long);	649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
599	}	652	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}
606
607	static void
608	deallocate_stack (Coro__State ctx)
609	{
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else	653	else
622	#endif	654	slot = coro->slot;
623	Safefree (stack->sptr);
624		655
625	Safefree (stack);	656	rss += sizeof (slot->curstackinfo);
626	}	657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
627	else if (ctx->gencnt == stack->gencnt)	658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
628	--stack->usecnt;	659	rss += slot->tmps_max * sizeof (SV *);
629	}	660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
630	}	661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
631		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
632	static void	674	static void
633	setup_coro (void *arg)	675	coro_setup (pTHX_ struct coro *coro)
634	{	676	{
635	/*	677	/*
636	* emulate part of the perl startup here.	678	* emulate part of the perl startup here.
637	*/	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	{
		896	dSP;
		897	LOGOP myop;
		898
		899	PL_top_env = &PL_start_env;
		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);
		915	SPAGAIN;
		916	}
		917
		918	/*
		919	* this is a _very_ stripped down perl interpreter ;)
		920	*/
		921	static void
		922	cctx_run (void *arg)
		923	{
638	dTHX;	924	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		925
643	coro_init_stacks (aTHX);	926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
644	/*PL_curcop = 0;*/	927	UNLOCK;
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */
646	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648		928
649	SPAGAIN;	929	/* we now skip the entersub that lead to transfer() */
		930	PL_op = PL_op->op_next;
650		931
651	if (ctx->stack)	932	/* inject a fake subroutine call to cctx_init */
652	{	933	cctx_prepare (aTHX_ (coro_cctx *)arg);
653	ctx->cursp = 0;
654		934
655	PUSHMARK(SP);	935	/* somebody or something will hit me for both perl_run and PL_restartop */
656	PUTBACK;	936	PL_restartop = PL_op;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	937	perl_run (PL_curinterp);
658		938
659	if (SvTRUE (ERRSV))	939	/*
660	croak (NULL);	940	* If perl-run returns we assume exit() was being called or the coro
661	else	941	* fell off the end, which seems to be the only valid (non-bug)
662	croak ("FATAL: CCTXT coroutine returned!");	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;
663	}	974	}
664	else	975	else
665	{	976	#endif
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}	977	{
689	}	978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
690		980
691	static void	981	if (!cctx->sptr)
692	continue_coro (void *arg)	982	{
693	{	983	perror ("FATAL: unable to allocate stack for coroutine");
694	/*	984	_exit (EXIT_FAILURE);
695	* this is a _very_ stripped down perl interpreter ;)	985	}
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700		986
701	PL_top_env = &ctx->start_env;	987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
702		990
703	ctx->cursp = 0;	991	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
704	PL_op = PL_op->op_next;	992	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
705	CALLRUNOPS(aTHX);
706		993
707	abort ();	994	return cctx;
708	}	995	}
709		996
710	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
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	1087	transfer (pTHX_ struct coro *prev, struct coro *next)
712	{	1088	{
713	dSTACKLEVEL;	1089	dSTACKLEVEL;
714		1090
715	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 */
716	{	1096	}
717	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))
718	{	1102	{
719	LOCK;	1103	/* create a new empty context */
720	SAVE (prev, flags);	1104	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	1105	prev->flags &= ~CF_NEW;
722	UNLOCK;	1106	prev->flags |= CF_RUNNING;
723
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}	1107	}
757	else if (next->tmps_ix == -2)	1108
758	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	}
759	else	1123	else
760	{	1124	{
761	LOCK;	1125	/* coroutine already started */
762	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);
763	UNLOCK;	1162	UNLOCK;
764		1163
765	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)
766	{	1169	{
767	if (!prev->stack)	1170	SV *exception = coro->throw;
768	allocate_stack (prev, 0);	1171	coro->throw = 0;
769		1172	sv_setsv (ERRSV, exception);
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);	1173	croak (0);
797	next->cursp = stacklevel;
798	}	1174	}
799	}	1175	}
800	}	1176	}
		1177	}
801		1178
802	LOCK;	1179	struct transfer_args
803	if (coro_mortal)	1180	{
804	{	1181	struct coro *prev, *next;
805	SvREFCNT_dec (coro_mortal);	1182	};
806	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)
807	}	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;
808	UNLOCK;	1203	UNLOCK;
809	}	1204	}
		1205	else
		1206	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
810		1207
811	#define SV_CORO(sv,func) \	1208	if (coro->mainstack && coro->mainstack != main_mainstack)
812	do { \	1209	{
813	if (SvROK (sv)) \	1210	struct coro temp;
814	sv = SvRV (sv); \
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		1211
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1212	if (coro->flags & CF_RUNNING)
		1213	croak ("FATAL: tried to destroy currently running coroutine");
833		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
834	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
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1282	api_transfer (SV *prev_sv, SV *next_sv)
836	{	1283	{
837	SV_CORO (prev, "Coro::transfer");	1284	dTHX;
838	SV_CORO (next, "Coro::transfer");	1285	struct transfer_args ta;
839		1286
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1287	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1288	TRANSFER (ta);
841	}	1289	}
842		1290
843	/** Coro ********************************************************************/	1291	/** Coro ********************************************************************/
844		1292
845	#define PRIO_MAX 3
846	#define PRIO_HIGH 1
847	#define PRIO_NORMAL 0
848	#define PRIO_LOW -1
849	#define PRIO_IDLE -3
850	#define PRIO_MIN -4
851
852	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;
856
857	static void	1293	static void
858	coro_enq (pTHX_ SV *sv)	1294	coro_enq (pTHX_ SV *coro_sv)
859	{	1295	{
860	if (SvTYPE (sv) == SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);	1296	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}	1297	}
877		1298
878	static SV *	1299	static SV *
879	coro_deq (pTHX_ int min_prio)	1300	coro_deq (pTHX_ int min_prio)
880	{	1301	{
…		…
883	min_prio -= PRIO_MIN;	1304	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1305	if (min_prio < 0)
885	min_prio = 0;	1306	min_prio = 0;
886		1307
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1308	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	1309	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready[prio]);	1310	return av_shift (coro_ready [prio]);
892	}
893		1311
894	return 0;	1312	return 0;
895	}	1313	}
896		1314
897	static void	1315	static int
898	api_ready (SV *coro)	1316	api_ready (SV *coro_sv)
899	{	1317	{
900	dTHX;	1318	dTHX;
		1319	struct coro *coro;
901		1320
902	if (SvROK (coro))	1321	if (SvROK (coro_sv))
903	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;
904		1330
905	LOCK;	1331	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	1332	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1333	++coro_nready;
907	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;
908	}	1423	}
909		1424
910	static void	1425	static void
911	api_schedule (void)	1426	api_schedule (void)
912	{	1427	{
913	dTHX;	1428	dTHX;
		1429	struct transfer_args ta;
914		1430
915	SV *prev, *next;	1431	prepare_schedule (aTHX_ &ta);
916		1432	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1433	}
938		1434
939	static void	1435	static int
940	api_cede (void)	1436	api_cede (void)
941	{	1437	{
942	dTHX;	1438	dTHX;
		1439	struct transfer_args ta;
943		1440
944	LOCK;	1441	prepare_cede (aTHX_ &ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1442
948	api_schedule ();	1443	if (expect_true (ta.prev != ta.next))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
949	}	1450	}
950		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
951	MODULE = Coro::State PACKAGE = Coro::State	1493	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
952		1494
953	PROTOTYPES: ENABLE	1495	PROTOTYPES: DISABLE
954		1496
955	BOOT:	1497	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1498	{
957	#ifdef USE_ITHREADS	1499	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1500	MUTEX_INIT (&coro_mutex);
959	#endif	1501	#endif
		1502	BOOT_PAGESIZE;
960		1503
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1504	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
962	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
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1514	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1515
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
969		1520
970	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;
971		1526
972	coroapi.ver = CORO_API_VERSION;	1527	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1528	coroapi.transfer = api_transfer;
974	}
975		1529
976	Coro::State	1530	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1531	}
978	SV * args	1532
979	PROTOTYPE: $	1533	SV *
		1534	new (char *klass, ...)
980	CODE:	1535	CODE:
981	Coro__State coro;	1536	{
		1537	struct coro *coro;
		1538	HV *hv;
		1539	int i;
982		1540
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1541	Newz (0, coro, 1, struct coro);
		1542	coro->args = newAV ();
		1543	coro->flags = CF_NEW;
987		1544
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1545	if (coro_first) coro_first->prev = coro;
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1546	coro->next = coro_first;
990	/*coro->stack = 0;*/	1547	coro_first = coro;
991		1548
992	/* same as JMPENV_BOOTSTRAP */	1549	coro->hv = hv = newHV ();
993	/* 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;
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1551	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997		1552
998	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	}
999	OUTPUT:	1557	OUTPUT:
1000	RETVAL	1558	RETVAL
1001		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
1002	void	1563	void
1003	transfer(prev, next, flags)	1564	_set_stacklevel (...)
1004	SV *prev	1565	ALIAS:
1005	SV *next	1566	Coro::State::transfer = 1
1006	int flags	1567	Coro::schedule = 2
1007	PROTOTYPE: @	1568	Coro::cede = 3
		1569	Coro::cede_notself = 4
		1570	Coro::Event::next = 5
		1571	Coro::Event::next_cancel = 6
1008	CODE:	1572	PPCODE:
1009	PUTBACK;	1573	{
1010	SV_CORO (next, "Coro::transfer");	1574	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1575	int repeat = 0;
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1576
1013	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	repeat = 1;
		1629	break;
		1630	}
		1631
		1632	BARRIER;
		1633	TRANSFER (ta);
		1634	BARRIER;
		1635	}
		1636	while (repeat);
		1637
		1638	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1639	XSRETURN_YES;
		1640	}
		1641
		1642	bool
		1643	_destroy (SV *coro_sv)
		1644	CODE:
		1645	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1646	OUTPUT:
		1647	RETVAL
1014		1648
1015	void	1649	void
1016	DESTROY(coro)
1017	Coro::State coro
1018	CODE:
1019
1020	if (coro->mainstack && coro->mainstack != main_mainstack)
1021	{
1022	struct coro temp;
1023
1024	PUTBACK;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026	LOAD (aTHX_ coro);
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040
1041	void
1042	_exit(code)	1650	_exit (code)
1043	int code	1651	int code
1044	PROTOTYPE: $	1652	PROTOTYPE: $
1045	CODE:	1653	CODE:
1046	_exit (code);	1654	_exit (code);
1047		1655
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1656	int
		1657	cctx_stacksize (int new_stacksize = 0)
		1658	CODE:
		1659	RETVAL = coro_stacksize;
		1660	if (new_stacksize)
		1661	coro_stacksize = new_stacksize;
		1662	OUTPUT:
		1663	RETVAL
1049		1664
1050	# this is slightly dirty (should expose a c-level api)	1665	int
		1666	cctx_count ()
		1667	CODE:
		1668	RETVAL = cctx_count;
		1669	OUTPUT:
		1670	RETVAL
		1671
		1672	int
		1673	cctx_idle ()
		1674	CODE:
		1675	RETVAL = cctx_idle;
		1676	OUTPUT:
		1677	RETVAL
1051		1678
1052	void	1679	void
1053	yield(...)	1680	list ()
1054	PROTOTYPE: @	1681	PPCODE:
		1682	{
		1683	struct coro *coro;
		1684	for (coro = coro_first; coro; coro = coro->next)
		1685	if (coro->hv)
		1686	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1687	}
		1688
		1689	void
		1690	call (Coro::State coro, SV *coderef)
		1691	ALIAS:
		1692	eval = 1
		1693	CODE:
		1694	{
		1695	if (coro->mainstack)
		1696	{
		1697	struct coro temp;
		1698
		1699	if (!(coro->flags & CF_RUNNING))
		1700	{
		1701	save_perl (aTHX_ &temp);
		1702	load_perl (aTHX_ coro);
		1703	}
		1704
		1705	{
		1706	dSP;
		1707	ENTER;
		1708	SAVETMPS;
		1709	PUSHMARK (SP);
		1710	PUTBACK;
		1711
		1712	if (ix)
		1713	eval_sv (coderef, 0);
		1714	else
		1715	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1716
		1717	SPAGAIN;
		1718	FREETMPS;
		1719	LEAVE;
		1720	PUTBACK;
		1721	}
		1722
		1723	if (!(coro->flags & CF_RUNNING))
		1724	{
		1725	save_perl (aTHX_ coro);
		1726	load_perl (aTHX_ &temp);
		1727	}
		1728	}
		1729	}
		1730
		1731	SV *
		1732	is_ready (Coro::State coro)
		1733	PROTOTYPE: $
		1734	ALIAS:
		1735	is_ready = CF_READY
		1736	is_running = CF_RUNNING
		1737	is_new = CF_NEW
		1738	is_destroyed = CF_DESTROYED
		1739	CODE:
		1740	RETVAL = boolSV (coro->flags & ix);
		1741	OUTPUT:
		1742	RETVAL
		1743
		1744	void
		1745	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1746
		1747	SV *
		1748	has_stack (Coro::State coro)
		1749	PROTOTYPE: $
		1750	CODE:
		1751	RETVAL = boolSV (!!coro->cctx);
		1752	OUTPUT:
		1753	RETVAL
		1754
		1755	int
		1756	is_traced (Coro::State coro)
		1757	PROTOTYPE: $
		1758	CODE:
		1759	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1760	OUTPUT:
		1761	RETVAL
		1762
		1763	IV
		1764	rss (Coro::State coro)
		1765	PROTOTYPE: $
		1766	ALIAS:
		1767	usecount = 1
1055	CODE:	1768	CODE:
1056	SV *yieldstack;	1769	switch (ix)
1057	SV *sv;	1770	{
1058	AV *defav = GvAV (PL_defgv);	1771	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	struct coro *prev, *next;	1772	case 1: RETVAL = coro->usecount; break;
1060
1061	yieldstack = *hv_fetch (
1062	(HV *)SvRV (GvSV (coro_current)),
1063	"yieldstack", sizeof ("yieldstack") - 1,
1064	0	1773	}
1065	);	1774	OUTPUT:
		1775	RETVAL
1066		1776
1067	/* set up @_ -- ugly */
1068	av_clear (defav);
1069	av_fill (defav, items - 1);
1070	while (items--)
1071	av_store (defav, items, SvREFCNT_inc (ST(items)));
1072
1073	sv = av_pop ((AV *)SvRV (yieldstack));
1074	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1075	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1076	SvREFCNT_dec (sv);
1077
1078	transfer (aTHX_ prev, next, 0);
1079		1777
1080	MODULE = Coro::State PACKAGE = Coro	1778	MODULE = Coro::State PACKAGE = Coro
1081		1779
1082	# this is slightly dirty (should expose a c-level api)
1083
1084	BOOT:	1780	BOOT:
1085	{	1781	{
1086	int i;	1782	int i;
		1783
		1784	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1785	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1786	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1787
		1788	coro_current = coro_get_sv ("Coro::current", FALSE);
		1789	SvREADONLY_on (coro_current);
		1790
1087	HV *stash = gv_stashpv ("Coro", TRUE);	1791	coro_stash = gv_stashpv ("Coro", TRUE);
1088		1792
1089	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1793	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1090	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1794	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1091	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1795	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1092	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1796	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1093	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1797	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1094	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1798	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1095
1096	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1097	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1098		1799
1099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1800	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1100	coro_ready[i] = newAV ();	1801	coro_ready[i] = newAV ();
1101		1802
1102	{	1803	{
1103	SV *sv = perl_get_sv("Coro::API", 1);	1804	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1805	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1104		1806
1105	coroapi.schedule = api_schedule;	1807	coroapi.schedule = api_schedule;
1106	coroapi.cede = api_cede;	1808	coroapi.cede = api_cede;
		1809	coroapi.cede_notself = api_cede_notself;
1107	coroapi.ready = api_ready;	1810	coroapi.ready = api_ready;
		1811	coroapi.is_ready = api_is_ready;
1108	coroapi.nready = &coro_nready;	1812	coroapi.nready = &coro_nready;
1109	coroapi.current = coro_current;	1813	coroapi.current = coro_current;
1110		1814
1111	GCoroAPI = &coroapi;	1815	GCoroAPI = &coroapi;
1112	sv_setiv(sv, (IV)&coroapi);	1816	sv_setiv (sv, (IV)&coroapi);
1113	SvREADONLY_on(sv);	1817	SvREADONLY_on (sv);
1114	}	1818	}
1115	}	1819	}
1116		1820
1117	#if !PERL_MICRO
1118
1119	void	1821	void
1120	ready(self)	1822	_set_current (SV *current)
1121	SV * self
1122	PROTOTYPE: $	1823	PROTOTYPE: $
1123	CODE:	1824	CODE:
1124	api_ready (self);	1825	SvREFCNT_dec (SvRV (coro_current));
1125		1826	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1126	#endif
1127		1827
1128	int	1828	int
		1829	prio (Coro::State coro, int newprio = 0)
		1830	ALIAS:
		1831	nice = 1
		1832	CODE:
		1833	{
		1834	RETVAL = coro->prio;
		1835
		1836	if (items > 1)
		1837	{
		1838	if (ix)
		1839	newprio = coro->prio - newprio;
		1840
		1841	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1842	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1843
		1844	coro->prio = newprio;
		1845	}
		1846	}
		1847	OUTPUT:
		1848	RETVAL
		1849
		1850	SV *
		1851	ready (SV *self)
		1852	PROTOTYPE: $
		1853	CODE:
		1854	RETVAL = boolSV (api_ready (self));
		1855	OUTPUT:
		1856	RETVAL
		1857
		1858	int
1129	nready(...)	1859	nready (...)
1130	PROTOTYPE:	1860	PROTOTYPE:
1131	CODE:	1861	CODE:
1132	RETVAL = coro_nready;	1862	RETVAL = coro_nready;
1133	OUTPUT:	1863	OUTPUT:
1134	RETVAL	1864	RETVAL
1135		1865
1136	void	1866	void
1137	schedule(...)	1867	throw (Coro::State self, SV *throw = &PL_sv_undef)
1138	PROTOTYPE:	1868	PROTOTYPE: $;$
		1869	CODE:
		1870	SvREFCNT_dec (self->throw);
		1871	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1872
		1873	# for async_pool speedup
		1874	void
		1875	_pool_1 (SV *cb)
1139	CODE:	1876	CODE:
1140	api_schedule ();	1877	{
		1878	struct coro *coro = SvSTATE (coro_current);
		1879	HV *hv = (HV *)SvRV (coro_current);
		1880	AV *defav = GvAV (PL_defgv);
		1881	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1882	AV *invoke_av;
		1883	int i, len;
		1884
		1885	if (!invoke)
		1886	croak ("\3async_pool terminate\2\n");
		1887
		1888	SvREFCNT_dec (coro->saved_deffh);
		1889	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1890
		1891	hv_store (hv, "desc", sizeof ("desc") - 1,
		1892	newSVpvn (strpair ("[async_pool]")), 0);
		1893
		1894	invoke_av = (AV *)SvRV (invoke);
		1895	len = av_len (invoke_av);
		1896
		1897	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1898
		1899	if (len > 0)
		1900	{
		1901	av_fill (defav, len - 1);
		1902	for (i = 0; i < len; ++i)
		1903	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1904	}
		1905
		1906	SvREFCNT_dec (invoke);
		1907	}
1141		1908
1142	void	1909	void
1143	cede(...)	1910	_pool_2 (SV *cb)
1144	PROTOTYPE:
1145	CODE:	1911	CODE:
1146	api_cede ();	1912	{
		1913	struct coro *coro = SvSTATE (coro_current);
1147		1914
		1915	sv_setsv (cb, &PL_sv_undef);
		1916
		1917	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1918	coro->saved_deffh = 0;
		1919
		1920	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1921	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1922	croak ("\3async_pool terminate\2\n");
		1923
		1924	av_clear (GvAV (PL_defgv));
		1925	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1926	newSVpvn (strpair ("[async_pool idle]")), 0);
		1927
		1928	coro->prio = 0;
		1929
		1930	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1931	api_trace (coro_current, 0);
		1932
		1933	av_push (av_async_pool, newSVsv (coro_current));
		1934	}
		1935
		1936
		1937	MODULE = Coro::State PACKAGE = Coro::AIO
		1938
		1939	SV *
		1940	_get_state ()
		1941	CODE:
		1942	{
		1943	struct io_state *data;
		1944
		1945	RETVAL = newSV (sizeof (struct io_state));
		1946	data = (struct io_state *)SvPVX (RETVAL);
		1947	SvCUR_set (RETVAL, sizeof (struct io_state));
		1948	SvPOK_only (RETVAL);
		1949
		1950	data->errorno = errno;
		1951	data->laststype = PL_laststype;
		1952	data->laststatval = PL_laststatval;
		1953	data->statcache = PL_statcache;
		1954	}
		1955	OUTPUT:
		1956	RETVAL
		1957
		1958	void
		1959	_set_state (char *data_)
		1960	PROTOTYPE: $
		1961	CODE:
		1962	{
		1963	struct io_state *data = (void *)data_;
		1964
		1965	errno = data->errorno;
		1966	PL_laststype = data->laststype;
		1967	PL_laststatval = data->laststatval;
		1968	PL_statcache = data->statcache;
		1969	}
		1970

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