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Comparing Coro/Coro/State.xs (file contents):
Revision 1.19 by root, Sun Jul 29 01:11:41 2001 UTC vs.
Revision 1.241 by root, Mon Jul 21 02:39:15 2008 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 "libcoro/coro.c"	10	#include "patchlevel.h"
		11
		12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
6		24
7	#ifdef HAVE_MMAP	25	#ifdef HAVE_MMAP
8	# include <unistd.h>	26	# include <unistd.h>
9	# include <sys/mman.h>	27	# include <sys/mman.h>
10	# ifndef MAP_ANON
11	# ifdef MAP_ANONYMOUS	28	# ifndef MAP_ANONYMOUS
12	# define MAP_ANON MAP_ANONYMOUS	29	# ifdef MAP_ANON
		30	# define MAP_ANONYMOUS MAP_ANON
13	# else	31	# else
14	# undef HAVE_MMAP	32	# undef HAVE_MMAP
15	# endif	33	# endif
16	# endif	34	# endif
		35	# include <limits.h>
		36	# ifndef PAGESIZE
		37	# define PAGESIZE pagesize
		38	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		39	static long pagesize;
		40	# else
		41	# define BOOT_PAGESIZE (void)0
17	#endif	42	# endif
18
19	#define MAY_FLUSH /* increases codesize */
20
21	/* perl-related */
22	#define TRANSFER_SAVE_DEFAV 0x00000001
23	#define TRANSFER_SAVE_DEFSV 0x00000002
24	#define TRANSFER_SAVE_ERRSV 0x00000004
25	/* c-related */
26	#define TRANSFER_SAVE_CCTXT 0x00000008
27	#ifdef CORO_LAZY_STACK
28	# define TRANSFER_LAZY_STACK 0x00000010
29	#else	43	#else
30	# define TRANSFER_LAZY_STACK 0x00000000	44	# define PAGESIZE 0
		45	# define BOOT_PAGESIZE (void)0
		46	#endif
		47
		48	#if CORO_USE_VALGRIND
		49	# include <valgrind/valgrind.h>
		50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
		53	#endif
		54
		55	/* the maximum number of idle cctx that will be pooled */
		56	#define MAX_IDLE_CCTX 8
		57
		58	#define PERL_VERSION_ATLEAST(a,b,c) \
		59	(PERL_REVISION > (a) \
		60	|| (PERL_REVISION == (a) \
		61	&& (PERL_VERSION > (b) \
		62	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		63
		64	#if !PERL_VERSION_ATLEAST (5,6,0)
		65	# ifndef PL_ppaddr
		66	# define PL_ppaddr ppaddr
31	#endif	67	# endif
		68	# ifndef call_sv
		69	# define call_sv perl_call_sv
		70	# endif
		71	# ifndef get_sv
		72	# define get_sv perl_get_sv
		73	# endif
		74	# ifndef get_cv
		75	# define get_cv perl_get_cv
		76	# endif
		77	# ifndef IS_PADGV
		78	# define IS_PADGV(v) 0
		79	# endif
		80	# ifndef IS_PADCONST
		81	# define IS_PADCONST(v) 0
		82	# endif
		83	#endif
32		84
33	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \	85	/* 5.8.8 */
34	|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)	86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
35		92
36	#define SUB_INIT "Coro::State::initialize"	93	/* 5.11 */
37	#define UCORO_STATE "_coro_state"	94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
38		97
39	/* The next macro should delcare a variable stacklevel that contains and approximation	98	/* 5.8.7 */
40	* to the current C stack pointer. It's property is that it changes with each call	99	#ifndef SvRV_set
41	* and should be unique. */	100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
		102
		103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		104	# undef CORO_STACKGUARD
		105	#endif
		106
		107	#ifndef CORO_STACKGUARD
		108	# define CORO_STACKGUARD 0
		109	#endif
		110
		111	/* prefer perl internal functions over our own? */
		112	#ifndef CORO_PREFER_PERL_FUNCTIONS
		113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
		115
		116	/* The next macros try to return the current stack pointer, in an as
		117	* portable way as possible. */
		118	#define dSTACKLEVEL volatile char stacklevel
42	#define dSTACKLEVEL void *stacklevel = &stacklevel	119	#define STACKLEVEL ((void *)&stacklevel)
43		120
44	#define labs(l) ((l) >= 0 ? (l) : -(l))	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
45		122
46	/* this is actually not only the c stack but also c registers etc... */	123	#if __GNUC__ >= 3
		124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
		131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
		135
		136	#define NOINLINE attribute ((noinline))
		137
		138	#include "CoroAPI.h"
		139
		140	#ifdef USE_ITHREADS
		141	static perl_mutex coro_mutex;
		142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		144	#else
		145	# define LOCK (void)0
		146	# define UNLOCK (void)0
		147	#endif
		148
		149	/* helper storage struct for Coro::AIO */
		150	struct io_state
		151	{
		152	int errorno;
		153	I32 laststype;
		154	int laststatval;
		155	Stat_t statcache;
		156	};
		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
		159	static struct CoroAPI coroapi;
		160	static AV *main_mainstack; /* used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
		162	static HV *coro_state_stash, *coro_stash;
		163	static volatile SV *coro_mortal; /* will be freed after next transfer */
		164
		165	static GV *irsgv; /* $/ */
		166	static GV *stdoutgv; /* *STDOUT */
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV *hv_sig; /* %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	/* Coro::AnyEvent */
		177	static SV *sv_activity;
		178
		179	static struct coro_cctx *cctx_first;
		180	static int cctx_count, cctx_idle;
		181
		182	enum {
		183	CC_MAPPED = 0x01,
		184	CC_NOREUSE = 0x02, /* throw this away after tracing */
		185	CC_TRACE = 0x04,
		186	CC_TRACE_SUB = 0x08, /* trace sub calls */
		187	CC_TRACE_LINE = 0x10, /* trace each statement */
		188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		189	};
		190
		191	/* this is a structure representing a c-level coroutine */
		192	typedef struct coro_cctx {
		193	struct coro_cctx *next;
		194
		195	/* the stack */
		196	void *sptr;
		197	size_t ssize;
		198
		199	/* cpu state */
		200	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		201	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		202	JMPENV *top_env;
		203	coro_context cctx;
		204
		205	#if CORO_USE_VALGRIND
		206	int valgrind_id;
		207	#endif
		208	unsigned char flags;
		209	} coro_cctx;
		210
		211	enum {
		212	CF_RUNNING = 0x0001, /* coroutine is running */
		213	CF_READY = 0x0002, /* coroutine is ready */
		214	CF_NEW = 0x0004, /* has never been switched to */
		215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		216	};
		217
		218	/* the structure where most of the perl state is stored, overlaid on the cxstack */
47	typedef struct {	219	typedef struct {
48	int refcnt; /* pointer reference counter */	220	SV *defsv;
49	int usecnt; /* shared by how many coroutines */	221	AV *defav;
50	int gencnt; /* generation counter */	222	SV *errsv;
		223	SV *irsgv;
		224	#define VAR(name,type) type name;
		225	# include "state.h"
		226	#undef VAR
		227	} perl_slots;
51		228
52	coro_context cctx;	229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
53		230
54	void *sptr;	231	/* this is a structure representing a perl-level coroutine */
55	long ssize; /* positive == mmap, otherwise malloc */
56	} coro_stack;
57
58	struct coro {	232	struct coro {
59	/* the optional C context */	233	/* the c coroutine allocated to this perl coroutine, if any */
60	coro_stack *stack;	234	coro_cctx *cctx;
61	void *cursp;
62	int gencnt;
63		235
64	/* optionally saved, might be zero */	236	/* process data */
65	AV *defav;
66	SV *defsv;
67	SV *errsv;
68
69	/* saved global state not related to stacks */
70	U8 dowarn;
71	I32 in_eval;
72
73	/* the stacks and related info (callchain etc..) */
74	PERL_SI *curstackinfo;
75	AV *curstack;
76	AV *mainstack;	237	AV *mainstack;
77	SV **stack_sp;	238	perl_slots *slot; /* basically the saved sp */
78	OP *op;
79	SV **curpad;
80	SV **stack_base;
81	SV **stack_max;
82	SV **tmps_stack;
83	I32 tmps_floor;
84	I32 tmps_ix;
85	I32 tmps_max;
86	I32 *markstack;
87	I32 *markstack_ptr;
88	I32 *markstack_max;
89	I32 *scopestack;
90	I32 scopestack_ix;
91	I32 scopestack_max;
92	ANY *savestack;
93	I32 savestack_ix;
94	I32 savestack_max;
95	OP **retstack;
96	I32 retstack_ix;
97	I32 retstack_max;
98	COP *curcop;
99	JMPENV *top_env;
100		239
101	/* data associated with this coroutine (initial args) */	240	AV *args; /* data associated with this coroutine (initial args) */
102	AV *args;	241	int refcnt; /* coroutines are refcounted, yes */
		242	int flags; /* CF_ flags */
		243	HV *hv; /* the perl hash associated with this coro, if any */
		244
		245	/* statistics */
		246	int usecount; /* number of transfers to this coro */
		247
		248	/* coro process data */
		249	int prio;
		250	SV *throw; /* exception to be thrown */
		251
		252	/* async_pool */
		253	SV *saved_deffh;
		254
		255	/* linked list */
		256	struct coro *next, *prev;
103	};	257	};
104		258
105	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
106	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
107		261
108	static AV *main_mainstack; /* used to differentiate between $main and others */	262	/** Coro ********************************************************************/
109	static HV *coro_state_stash;
110	static SV *ucoro_state_sv;
111	static U32 ucoro_state_hash;
112	static HV *padlist_cache;
113		263
114	/* mostly copied from op.c:cv_clone2 */	264	#define PRIO_MAX 3
115	STATIC AV *	265	#define PRIO_HIGH 1
116	clone_padlist (AV *protopadlist)	266	#define PRIO_NORMAL 0
		267	#define PRIO_LOW -1
		268	#define PRIO_IDLE -3
		269	#define PRIO_MIN -4
		270
		271	/* for Coro.pm */
		272	static SV *coro_current;
		273	static SV *coro_readyhook;
		274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		275	static int coro_nready;
		276	static struct coro *coro_first;
		277
		278	/** lowlevel stuff **********************************************************/
		279
		280	static SV *
		281	coro_get_sv (pTHX_ const char *name, int create)
117	{	282	{
118	AV *av;	283	#if PERL_VERSION_ATLEAST (5,10,0)
119	I32 ix;	284	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
120	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	285	get_sv (name, create);
121	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	286	#endif
122	SV **pname = AvARRAY (protopad_name);	287	return get_sv (name, create);
123	SV **ppad = AvARRAY (protopad);	288	}
124	I32 fname = AvFILLp (protopad_name);	289
125	I32 fpad = AvFILLp (protopad);	290	static AV *
		291	coro_get_av (pTHX_ const char *name, int create)
		292	{
		293	#if PERL_VERSION_ATLEAST (5,10,0)
		294	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		295	get_av (name, create);
		296	#endif
		297	return get_av (name, create);
		298	}
		299
		300	static HV *
		301	coro_get_hv (pTHX_ const char *name, int create)
		302	{
		303	#if PERL_VERSION_ATLEAST (5,10,0)
		304	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		305	get_hv (name, create);
		306	#endif
		307	return get_hv (name, create);
		308	}
		309
		310	static AV *
		311	coro_clone_padlist (pTHX_ CV *cv)
		312	{
		313	AV *padlist = CvPADLIST (cv);
126	AV *newpadlist, *newpad_name, *newpad;	314	AV *newpadlist, *newpad;
127	SV **npad;
128
129	newpad_name = newAV ();
130	for (ix = fname; ix >= 0; ix--)
131	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
132
133	newpad = newAV ();
134	av_fill (newpad, AvFILLp (protopad));
135	npad = AvARRAY (newpad);
136		315
137	newpadlist = newAV ();	316	newpadlist = newAV ();
138	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
139	av_store (newpadlist, 0, (SV *) newpad_name);	318	#if PERL_VERSION_ATLEAST (5,10,0)
		319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		320	#else
		321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		322	#endif
		323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		324	--AvFILLp (padlist);
		325
		326	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
140	av_store (newpadlist, 1, (SV *) newpad);	327	av_store (newpadlist, 1, (SV *)newpad);
141		328
142	av = newAV (); /* will be @_ */	329	return newpadlist;
143	av_extend (av, 0);	330	}
144	av_store (newpad, 0, (SV *) av);
145	AvFLAGS (av) = AVf_REIFY;
146		331
147	for (ix = fpad; ix > 0; ix--)	332	static void
		333	free_padlist (pTHX_ AV *padlist)
		334	{
		335	/* may be during global destruction */
		336	if (SvREFCNT (padlist))
148	{	337	{
149	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	338	I32 i = AvFILLp (padlist);
150	if (namesv && namesv != &PL_sv_undef)	339	while (i >= 0)
151	{	340	{
152	char *name = SvPVX (namesv); /* XXX */	341	SV **svp = av_fetch (padlist, i--, FALSE);
153	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	342	if (svp)
154	{ /* lexical from outside? */
155	npad[ix] = SvREFCNT_inc (ppad[ix]);
156	}	343	{
157	else
158	{ /* our own lexical */
159	SV *sv;	344	SV *sv;
160	if (*name == '&')	345	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
161	sv = SvREFCNT_inc (ppad[ix]);	346	SvREFCNT_dec (sv);
162	else if (*name == '@')	347
163	sv = (SV *) newAV ();	348	SvREFCNT_dec (*svp);
164	else if (*name == '%')
165	sv = (SV *) newHV ();
166	else
167	sv = NEWSV (0, 0);
168	if (!SvPADBUSY (sv))
169	SvPADMY_on (sv);
170	npad[ix] = sv;
171	}	349	}
172	}	350	}
173	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
174	{
175	npad[ix] = SvREFCNT_inc (ppad[ix]);
176	}
177	else
178	{
179	SV *sv = NEWSV (0, 0);
180	SvPADTMP_on (sv);
181	npad[ix] = sv;
182	}
183	}
184		351
185	#if 0 /* return -ENOTUNDERSTOOD */
186	/* Now that vars are all in place, clone nested closures. */
187
188	for (ix = fpad; ix > 0; ix--) {
189	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
190	if (namesv
191	&& namesv != &PL_sv_undef
192	&& !(SvFLAGS(namesv) & SVf_FAKE)
193	&& *SvPVX(namesv) == '&'
194	&& CvCLONE(ppad[ix]))
195	{
196	CV *kid = cv_clone((CV*)ppad[ix]);
197	SvREFCNT_dec(ppad[ix]);
198	CvCLONE_on(kid);
199	SvPADMY_on(kid);
200	npad[ix] = (SV*)kid;
201	}
202	}
203	#endif
204
205	return newpadlist;
206	}
207
208	#ifdef MAY_FLUSH
209	STATIC AV *
210	free_padlist (AV *padlist)
211	{
212	/* may be during global destruction */
213	if (SvREFCNT(padlist))
214	{
215	I32 i = AvFILLp(padlist);
216	while (i >= 0)
217	{
218	SV **svp = av_fetch(padlist, i--, FALSE);
219	SV *sv = svp ? *svp : Nullsv;
220	if (sv)
221	SvREFCNT_dec(sv);
222	}
223
224	SvREFCNT_dec((SV*)padlist);	352	SvREFCNT_dec ((SV*)padlist);
225	}	353	}
226	}	354	}
227	#endif	355
		356	static int
		357	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		358	{
		359	AV *padlist;
		360	AV *av = (AV *)mg->mg_obj;
		361
		362	/* casting is fun. */
		363	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		364	free_padlist (aTHX_ padlist);
		365
		366	return 0;
		367	}
		368
		369	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		370	#define CORO_MAGIC_type_state PERL_MAGIC_ext
		371
		372	static MGVTBL coro_cv_vtbl = {
		373	0, 0, 0, 0,
		374	coro_cv_free
		375	};
		376
		377	#define CORO_MAGIC(sv,type) \
		378	SvMAGIC (sv) \
		379	? SvMAGIC (sv)->mg_type == type \
		380	? SvMAGIC (sv) \
		381	: mg_find (sv, type) \
		382	: 0
		383
		384	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		385	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		386
		387	static struct coro *
		388	SvSTATE_ (pTHX_ SV *coro)
		389	{
		390	HV *stash;
		391	MAGIC *mg;
		392
		393	if (SvROK (coro))
		394	coro = SvRV (coro);
		395
		396	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		397	croak ("Coro::State object required");
		398
		399	stash = SvSTASH (coro);
		400	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		401	{
		402	/* very slow, but rare, check */
		403	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		404	croak ("Coro::State object required");
		405	}
		406
		407	mg = CORO_MAGIC_state (coro);
		408	return (struct coro *)mg->mg_ptr;
		409	}
		410
		411	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
228		412
229	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
230	STATIC void	414	static void
231	get_padlist (CV *cv)	415	get_padlist (pTHX_ CV *cv)
232	{	416	{
233	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
		418	AV *av;
234		419
235	if (he && AvFILLp ((AV *)*he) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
236	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
237	else	422	else
238	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
239	}
240
241	STATIC void
242	put_padlist (CV *cv)
243	{
244	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
245
246	if (SvTYPE (*he) != SVt_PVAV)
247	{	423	{
		424	#if CORO_PREFER_PERL_FUNCTIONS
		425	/* this is probably cleaner, but also slower? */
		426	CV *cp = Perl_cv_clone (cv);
		427	CvPADLIST (cv) = CvPADLIST (cp);
		428	CvPADLIST (cp) = 0;
248	SvREFCNT_dec (*he);	429	SvREFCNT_dec (cp);
249	*he = (SV *)newAV ();	430	#else
		431	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		432	#endif
250	}	433	}
251
252	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
253	}	434	}
254
255	#ifdef MAY_FLUSH
256	STATIC void
257	flush_padlist_cache ()
258	{
259	HV *hv = padlist_cache;
260	padlist_cache = newHV ();
261
262	if (hv_iterinit (hv))
263	{
264	HE *he;
265	AV *padlist;
266
267	while (!!(he = hv_iternext (hv)))
268	{
269	AV *av = (AV *)HeVAL(he);
270
271	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (padlist);
274	}
275	}
276
277	SvREFCNT_dec (hv);
278	}
279	#endif
280
281	#define SB do {
282	#define SE } while (0)
283
284	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
285	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
286
287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
288		435
289	static void	436	static void
		437	put_padlist (pTHX_ CV *cv)
		438	{
		439	MAGIC *mg = CORO_MAGIC_cv (cv);
		440	AV *av;
		441
		442	if (expect_false (!mg))
		443	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
		444
		445	av = (AV *)mg->mg_obj;
		446
		447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		448	av_extend (av, AvMAX (av) + 1);
		449
		450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		451	}
		452
		453	/** load & save, init *******************************************************/
		454
		455	static void
290	load_state(pTHX_ Coro__State c)	456	load_perl (pTHX_ Coro__State c)
291	{	457	{
292	PL_dowarn = c->dowarn;	458	perl_slots *slot = c->slot;
293	PL_in_eval = c->in_eval;	459	c->slot = 0;
294		460
295	PL_curstackinfo = c->curstackinfo;
296	PL_curstack = c->curstack;
297	PL_mainstack = c->mainstack;	461	PL_mainstack = c->mainstack;
298	PL_stack_sp = c->stack_sp;
299	PL_op = c->op;
300	PL_curpad = c->curpad;
301	PL_stack_base = c->stack_base;
302	PL_stack_max = c->stack_max;
303	PL_tmps_stack = c->tmps_stack;
304	PL_tmps_floor = c->tmps_floor;
305	PL_tmps_ix = c->tmps_ix;
306	PL_tmps_max = c->tmps_max;
307	PL_markstack = c->markstack;
308	PL_markstack_ptr = c->markstack_ptr;
309	PL_markstack_max = c->markstack_max;
310	PL_scopestack = c->scopestack;
311	PL_scopestack_ix = c->scopestack_ix;
312	PL_scopestack_max = c->scopestack_max;
313	PL_savestack = c->savestack;
314	PL_savestack_ix = c->savestack_ix;
315	PL_savestack_max = c->savestack_max;
316	PL_retstack = c->retstack;
317	PL_retstack_ix = c->retstack_ix;
318	PL_retstack_max = c->retstack_max;
319	PL_curcop = c->curcop;
320	PL_top_env = c->top_env;
321		462
322	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	463	GvSV (PL_defgv) = slot->defsv;
323	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	464	GvAV (PL_defgv) = slot->defav;
324	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	465	GvSV (PL_errgv) = slot->errsv;
		466	GvSV (irsgv) = slot->irsgv;
		467
		468	#define VAR(name,type) PL_ ## name = slot->name;
		469	# include "state.h"
		470	#undef VAR
325		471
326	{	472	{
327	dSP;	473	dSP;
		474
328	CV *cv;	475	CV *cv;
329		476
330	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
331	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
332	{	479	{
333	AV *padlist = (AV *)POPs;
334
335	if (padlist)
336	{
337	put_padlist (cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
338	CvPADLIST(cv) = padlist;	481	CvDEPTH (cv) = PTR2IV (POPs);
339	#ifdef USE_THREADS	482	CvPADLIST (cv) = (AV *)POPs;
340	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
341	#endif
342	}
343
344	++CvDEPTH(cv);
345	}	483	}
346		484
347	PUTBACK;	485	PUTBACK;
348	}	486	}
349	}	487	}
350		488
351	static void	489	static void
352	save_state(pTHX_ Coro__State c, int flags)	490	save_perl (pTHX_ Coro__State c)
353	{	491	{
354	{	492	{
355	dSP;	493	dSP;
356	I32 cxix = cxstack_ix;	494	I32 cxix = cxstack_ix;
357	PERL_CONTEXT *ccstk = cxstack;	495	PERL_CONTEXT *ccstk = cxstack;
…		…
360	/*	498	/*
361	* the worst thing you can imagine happens first - we have to save	499	* the worst thing you can imagine happens first - we have to save
362	* (and reinitialize) all cv's in the whole callchain :(	500	* (and reinitialize) all cv's in the whole callchain :(
363	*/	501	*/
364		502
365	PUSHs (Nullsv);	503	XPUSHs (Nullsv);
366	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
367	for (;;)	505	for (;;)
368	{	506	{
369	do	507	while (expect_true (cxix >= 0))
370	{	508	{
371	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
372		510
373	if (CxTYPE(cx) == CXt_SUB)	511	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
374	{	512	{
375	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
		514
376	if (CvDEPTH(cv))	515	if (expect_true (CvDEPTH (cv)))
377	{	516	{
378	#ifdef USE_THREADS
379	/*XPUSHs ((SV *)CvOWNER(cv));*/
380	/*CvOWNER(cv) = 0;*/
381	/*error must unlock this cv etc.. etc...*/
382	#endif
383	EXTEND (SP, CvDEPTH(cv)*2);	517	EXTEND (SP, 3);
384
385	while (--CvDEPTH(cv))
386	{
387	/* this tells the restore code to increment CvDEPTH */
388	PUSHs (Nullsv);
389	PUSHs ((SV *)cv);
390	}
391
392	PUSHs ((SV *)CvPADLIST(cv));	518	PUSHs ((SV *)CvPADLIST (cv));
		519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
393	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
394		521
395	get_padlist (cv); /* this is a monster */	522	CvDEPTH (cv) = 0;
		523	get_padlist (aTHX_ cv);
396	}	524	}
397	}	525	}
398	else if (CxTYPE(cx) == CXt_FORMAT)
399	{
400	/* I never used formats, so how should I know how these are implemented? */
401	/* my bold guess is as a simple, plain sub... */
402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403	}
404	}	526	}
405	while (cxix >= 0);
406		527
407	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
408	break;	529	break;
409		530
410	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
411	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
412	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
413	}	534	}
414		535
415	PUTBACK;	536	PUTBACK;
416	}	537	}
417		538
418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	539	/* allocate some space on the context stack for our purposes */
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
420	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	541	if (SLOT_COUNT >= 1) CXINC;
		542	if (SLOT_COUNT >= 2) CXINC;
		543	if (SLOT_COUNT >= 3) CXINC;
		544	{
		545	int i;
		546	for (i = 3; i < SLOT_COUNT; ++i)
		547	CXINC;
		548	}
		549	cxstack_ix -= SLOT_COUNT; /* undo allocation */
421		550
422	/* I have not the slightest idea of why av_reify is necessary */
423	/* but if it's missing the defav contents magically get replaced sometimes */
424	if (c->defav)
425	av_reify (c->defav);
426
427	c->dowarn = PL_dowarn;
428	c->in_eval = PL_in_eval;
429
430	c->curstackinfo = PL_curstackinfo;
431	c->curstack = PL_curstack;
432	c->mainstack = PL_mainstack;	551	c->mainstack = PL_mainstack;
433	c->stack_sp = PL_stack_sp;	552
434	c->op = PL_op;	553	{
435	c->curpad = PL_curpad;	554	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
436	c->stack_base = PL_stack_base;	555
437	c->stack_max = PL_stack_max;	556	slot->defav = GvAV (PL_defgv);
438	c->tmps_stack = PL_tmps_stack;	557	slot->defsv = DEFSV;
439	c->tmps_floor = PL_tmps_floor;	558	slot->errsv = ERRSV;
440	c->tmps_ix = PL_tmps_ix;	559	slot->irsgv = GvSV (irsgv);
441	c->tmps_max = PL_tmps_max;	560
442	c->markstack = PL_markstack;	561	#define VAR(name,type) slot->name = PL_ ## name;
443	c->markstack_ptr = PL_markstack_ptr;	562	# include "state.h"
444	c->markstack_max = PL_markstack_max;	563	#undef VAR
445	c->scopestack = PL_scopestack;	564	}
446	c->scopestack_ix = PL_scopestack_ix;
447	c->scopestack_max = PL_scopestack_max;
448	c->savestack = PL_savestack;
449	c->savestack_ix = PL_savestack_ix;
450	c->savestack_max = PL_savestack_max;
451	c->retstack = PL_retstack;
452	c->retstack_ix = PL_retstack_ix;
453	c->retstack_max = PL_retstack_max;
454	c->curcop = PL_curcop;
455	c->top_env = PL_top_env;
456	}	565	}
457		566
458	/*	567	/*
459	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
460	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
461	* on the assumption that coroutines do not usually need	570	* on the (sometimes correct) assumption that coroutines do
462	* a lot of stackspace.	571	* not usually need a lot of stackspace.
463	*/	572	*/
464	STATIC void	573	#if CORO_PREFER_PERL_FUNCTIONS
		574	# define coro_init_stacks init_stacks
		575	#else
		576	static void
465	coro_init_stacks (pTHX)	577	coro_init_stacks (pTHX)
466	{	578	{
467	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	579	PL_curstackinfo = new_stackinfo(32, 8);
468	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
469	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
470	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
471		583
472	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
473	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
474	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
475		587
476	New(50,PL_tmps_stack,96,SV*);	588	New(50,PL_tmps_stack,32,SV*);
477	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
478	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
479	PL_tmps_max = 96;	591	PL_tmps_max = 32;
480		592
481	New(54,PL_markstack,16,I32);	593	New(54,PL_markstack,16,I32);
482	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
483	PL_markstack_max = PL_markstack + 16;	595	PL_markstack_max = PL_markstack + 16;
484		596
		597	#ifdef SET_MARK_OFFSET
485	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
		599	#endif
486		600
487	New(54,PL_scopestack,16,I32);	601	New(54,PL_scopestack,8,I32);
488	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
489	PL_scopestack_max = 16;	603	PL_scopestack_max = 8;
490		604
491	New(54,PL_savestack,96,ANY);	605	New(54,PL_savestack,24,ANY);
492	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
493	PL_savestack_max = 96;	607	PL_savestack_max = 24;
494		608
		609	#if !PERL_VERSION_ATLEAST (5,10,0)
495	New(54,PL_retstack,8,OP*);	610	New(54,PL_retstack,4,OP*);
496	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
497	PL_retstack_max = 8;	612	PL_retstack_max = 4;
		613	#endif
498	}	614	}
		615	#endif
499		616
500	/*	617	/*
501	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
502	* still there is a memleak of 128 bytes...
503	*/	619	*/
504	STATIC void	620	static void
505	destroy_stacks(pTHX)	621	coro_destroy_stacks (pTHX)
506	{	622	{
507	/* is this ugly, I ask? */
508	while (PL_scopestack_ix)
509	LEAVE;
510
511	/* sure it is, but more important: is it correct?? :/ */
512	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
513	FREETMPS;
514
515	while (PL_curstackinfo->si_next)	623	while (PL_curstackinfo->si_next)
516	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
517		625
518	while (PL_curstackinfo)	626	while (PL_curstackinfo)
519	{	627	{
520	PERL_SI *p = PL_curstackinfo->si_prev;	628	PERL_SI *p = PL_curstackinfo->si_prev;
521		629
522	{	630	if (!IN_DESTRUCT)
523	dSP;
524	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
525	PUTBACK; /* possibly superfluous */
526	}
527
528	dounwind(-1);
529
530	SvREFCNT_dec(PL_curstackinfo->si_stack);	631	SvREFCNT_dec (PL_curstackinfo->si_stack);
		632
531	Safefree(PL_curstackinfo->si_cxstack);	633	Safefree (PL_curstackinfo->si_cxstack);
532	Safefree(PL_curstackinfo);	634	Safefree (PL_curstackinfo);
533	PL_curstackinfo = p;	635	PL_curstackinfo = p;
534	}	636	}
535		637
536	Safefree(PL_tmps_stack);	638	Safefree (PL_tmps_stack);
537	Safefree(PL_markstack);	639	Safefree (PL_markstack);
538	Safefree(PL_scopestack);	640	Safefree (PL_scopestack);
539	Safefree(PL_savestack);	641	Safefree (PL_savestack);
		642	#if !PERL_VERSION_ATLEAST (5,10,0)
540	Safefree(PL_retstack);	643	Safefree (PL_retstack);
		644	#endif
		645	}
		646
		647	static size_t
		648	coro_rss (pTHX_ struct coro *coro)
		649	{
		650	size_t rss = sizeof (*coro);
		651
		652	if (coro->mainstack)
		653	{
		654	perl_slots tmp_slot;
		655	perl_slots *slot;
		656
		657	if (coro->flags & CF_RUNNING)
		658	{
		659	slot = &tmp_slot;
		660
		661	#define VAR(name,type) slot->name = PL_ ## name;
		662	# include "state.h"
		663	#undef VAR
		664	}
		665	else
		666	slot = coro->slot;
		667
		668	rss += sizeof (slot->curstackinfo);
		669	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		670	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		671	rss += slot->tmps_max * sizeof (SV *);
		672	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		673	rss += slot->scopestack_max * sizeof (I32);
		674	rss += slot->savestack_max * sizeof (ANY);
		675
		676	#if !PERL_VERSION_ATLEAST (5,10,0)
		677	rss += slot->retstack_max * sizeof (OP *);
		678	#endif
		679	}
		680
		681	return rss;
		682	}
		683
		684	/** coroutine stack handling ************************************************/
		685
		686	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		687	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		688	static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
		689
		690	/* apparently < 5.8.8 */
		691	#ifndef MgPV_nolen_const
		692	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		693	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
		694	(const char*)(mg)->mg_ptr)
		695	#endif
		696
		697	/*
		698	* This overrides the default magic get method of %SIG elements.
		699	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		700	* and instead of tryign to save and restore the hash elements, we just provide
		701	* readback here.
		702	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		703	* not expecting this to actually change the hook. This is a potential problem
		704	* when a schedule happens then, but we ignore this.
		705	*/
		706	static int
		707	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		708	{
		709	const char *s = MgPV_nolen_const (mg);
		710
		711	if (*s == '_')
		712	{
		713	SV **svp = 0;
		714
		715	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		716	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		717
		718	if (svp)
		719	{
		720	sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
		721	return 0;
		722	}
		723	}
		724
		725	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		726	}
		727
		728	static int
		729	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		730	{
		731	const char *s = MgPV_nolen_const (mg);
		732
		733	if (*s == '_')
		734	{
		735	SV **svp = 0;
		736
		737	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		738	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		739
		740	if (svp)
		741	{
		742	SV *old = *svp;
		743	*svp = 0;
		744	SvREFCNT_dec (old);
		745	return 0;
		746	}
		747	}
		748
		749	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		750	}
		751
		752	static int
		753	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		754	{
		755	const char *s = MgPV_nolen_const (mg);
		756
		757	if (*s == '_')
		758	{
		759	SV **svp = 0;
		760
		761	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		762	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		763
		764	if (svp)
		765	{
		766	SV *old = *svp;
		767	*svp = newSVsv (sv);
		768	SvREFCNT_dec (old);
		769	return 0;
		770	}
		771	}
		772
		773	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
541	}	774	}
542		775
543	static void	776	static void
544	allocate_stack (Coro__State ctx, int alloc)	777	coro_setup (pTHX_ struct coro *coro)
545	{
546	coro_stack *stack;
547
548	New (0, stack, 1, coro_stack);
549
550	stack->refcnt = 1;
551	stack->usecnt = 1;
552	stack->gencnt = ctx->gencnt = 0;
553	if (alloc)
554	{
555	#ifdef HAVE_MMAP
556	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
558	if (stack->sptr == (void *)-1)
559	#endif
560	{
561	/*FIXME*//*D*//* reasonable stack size! */
562	stack->ssize = -4096 * sizeof (long);
563	New (0, stack->sptr, 4096, long);
564	}
565	}
566	else
567	stack->sptr = 0;
568
569	ctx->stack = stack;
570	}
571
572	static void
573	deallocate_stack (Coro__State ctx)
574	{
575	coro_stack *stack = ctx->stack;
576
577	ctx->stack = 0;
578
579	if (stack)
580	{
581	if (!--stack->refcnt)
582	{
583	#ifdef HAVE_MMAP
584	if (stack->ssize > 0 && stack->sptr)
585	munmap (stack->sptr, stack->ssize);
586	else
587	#else
588	Safefree (stack->sptr);
589	#endif
590	Safefree (stack);
591	}
592	else if (ctx->gencnt == stack->gencnt)
593	--stack->usecnt;
594	}
595	}
596
597	static void
598	setup_coro (void *arg)
599	{	778	{
600	/*	779	/*
601	* emulate part of the perl startup here.	780	* emulate part of the perl startup here.
602	*/	781	*/
603	dSP;
604	Coro__State ctx = (Coro__State)arg;
605	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606
607	coro_init_stacks (aTHX);	782	coro_init_stacks (aTHX);
608	/*PL_curcop = 0;*/	783
609	/*PL_in_eval = PL_in_eval;*/ /* inherit */	784	PL_runops = RUNOPS_DEFAULT;
		785	PL_curcop = &PL_compiling;
		786	PL_in_eval = EVAL_NULL;
		787	PL_comppad = 0;
		788	PL_curpm = 0;
		789	PL_curpad = 0;
		790	PL_localizing = 0;
		791	PL_dirty = 0;
		792	PL_restartop = 0;
		793	#if PERL_VERSION_ATLEAST (5,10,0)
		794	PL_parser = 0;
		795	#endif
		796
		797	/* recreate the die/warn hooks */
		798	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		799	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		800
		801	GvSV (PL_defgv) = newSV (0);
		802	GvAV (PL_defgv) = coro->args; coro->args = 0;
		803	GvSV (PL_errgv) = newSV (0);
		804	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		805	PL_rs = newSVsv (GvSV (irsgv));
		806	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		807
		808	{
		809	dSP;
		810	LOGOP myop;
		811
		812	Zero (&myop, 1, LOGOP);
		813	myop.op_next = Nullop;
		814	myop.op_flags = OPf_WANT_VOID;
		815
		816	PUSHMARK (SP);
		817	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		818	PUTBACK;
		819	PL_op = (OP *)&myop;
		820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		821	SPAGAIN;
		822	}
		823
		824	/* this newly created coroutine might be run on an existing cctx which most
		825	* likely was suspended in set_stacklevel, called from entersub.
		826	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		827	* so we ENTER here for symmetry
		828	*/
		829	ENTER;
		830	}
		831
		832	static void
		833	coro_destroy (pTHX_ struct coro *coro)
		834	{
		835	if (!IN_DESTRUCT)
		836	{
		837	/* restore all saved variables and stuff */
		838	LEAVE_SCOPE (0);
		839	assert (PL_tmps_floor == -1);
		840
		841	/* free all temporaries */
		842	FREETMPS;
		843	assert (PL_tmps_ix == -1);
		844
		845	/* unwind all extra stacks */
		846	POPSTACK_TO (PL_mainstack);
		847
		848	/* unwind main stack */
		849	dounwind (-1);
		850	}
		851
		852	SvREFCNT_dec (GvSV (PL_defgv));
610	SvREFCNT_dec (GvAV (PL_defgv));	853	SvREFCNT_dec (GvAV (PL_defgv));
611	GvAV (PL_defgv) = ctx->args;	854	SvREFCNT_dec (GvSV (PL_errgv));
		855	SvREFCNT_dec (PL_defoutgv);
		856	SvREFCNT_dec (PL_rs);
		857	SvREFCNT_dec (GvSV (irsgv));
612		858
613	SPAGAIN;	859	SvREFCNT_dec (PL_diehook);
		860	SvREFCNT_dec (PL_warnhook);
		861
		862	SvREFCNT_dec (coro->saved_deffh);
		863	SvREFCNT_dec (coro->throw);
614		864
615	if (ctx->stack)	865	coro_destroy_stacks (aTHX);
616	{
617	ctx->cursp = 0;
618
619	PUSHMARK(SP);
620	PUTBACK;
621	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623	if (SvTRUE (ERRSV))
624	croak (NULL);
625	else
626	croak ("FATAL: CCTXT coroutine returned!");
627	}
628	else
629	{
630	UNOP myop;
631
632	PL_op = (OP *)&myop;
633
634	Zero(&myop, 1, UNOP);
635	myop.op_next = Nullop;
636	myop.op_flags = OPf_WANT_VOID;
637
638	PUSHMARK(SP);
639	XPUSHs (sub_init);
640	/*
641	* the next line is slightly wrong, as PL_op->op_next
642	* is actually being executed so we skip the first op.
643	* that doesn't matter, though, since it is only
644	* pp_nextstate and we never return...
645	* ah yes, and I don't care anyways ;)
646	*/
647	PUTBACK;
648	PL_op = pp_entersub();
649	SPAGAIN;
650
651	ENTER; /* necessary e.g. for dounwind */
652	}
653	}	866	}
654		867
655	static void	868	static void
656	continue_coro (void *arg)	869	free_coro_mortal (pTHX)
657	{	870	{
658	/*	871	if (expect_true (coro_mortal))
659	* this is a _very_ stripped down perl interpreter ;)	872	{
660	*/	873	SvREFCNT_dec (coro_mortal);
661	Coro__State ctx = (Coro__State)arg;	874	coro_mortal = 0;
662
663	/*FIXME*//* must set up top_env here */
664	ctx->cursp = 0;
665	PL_op = PL_op->op_next;
666	CALLRUNOPS(aTHX);
667
668	abort ();
669	}
670
671	STATIC void
672	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
673	{
674	dSP;
675	dSTACKLEVEL;
676
677	if (prev != next)
678	{	875	}
679	if (next->mainstack)	876	}
		877
		878	static int
		879	runops_trace (pTHX)
		880	{
		881	COP *oldcop = 0;
		882	int oldcxix = -2;
		883	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		884	coro_cctx *cctx = coro->cctx;
		885
		886	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		887	{
		888	PERL_ASYNC_CHECK ();
		889
		890	if (cctx->flags & CC_TRACE_ALL)
680	{	891	{
681	SAVE (prev, flags);	892	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
682	LOAD (next);
683
684	/* mark this state as in-use */
685	next->mainstack = 0;
686	next->tmps_ix = -2;
687
688	/* stacklevel changed? if yes, grab the stack for us! */
689	if (flags & TRANSFER_SAVE_CCTXT)
690	{	893	{
691	if (!prev->stack)	894	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
692	allocate_stack (prev, 0);	895	SV **bot, **top;
693	else if (prev->cursp != stacklevel	896	AV *av = newAV (); /* return values */
694	&& prev->stack->usecnt > 1)	897	SV **cb;
		898	dSP;
		899
		900	GV *gv = CvGV (cx->blk_sub.cv);
		901	SV *fullname = sv_2mortal (newSV (0));
		902	if (isGV (gv))
		903	gv_efullname3 (fullname, gv, 0);
		904
		905	bot = PL_stack_base + cx->blk_oldsp + 1;
		906	top = cx->blk_gimme == G_ARRAY ? SP + 1
		907	: cx->blk_gimme == G_SCALAR ? bot + 1
		908	: bot;
		909
		910	av_extend (av, top - bot);
		911	while (bot < top)
		912	av_push (av, SvREFCNT_inc (*bot++));
		913
		914	PL_runops = RUNOPS_DEFAULT;
		915	ENTER;
		916	SAVETMPS;
		917	EXTEND (SP, 3);
		918	PUSHMARK (SP);
		919	PUSHs (&PL_sv_no);
		920	PUSHs (fullname);
		921	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		922	PUTBACK;
		923	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		924	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		925	SPAGAIN;
		926	FREETMPS;
		927	LEAVE;
		928	PL_runops = runops_trace;
		929	}
		930
		931	if (oldcop != PL_curcop)
		932	{
		933	oldcop = PL_curcop;
		934
		935	if (PL_curcop != &PL_compiling)
695	{	936	{
696	prev->gencnt = ++prev->stack->gencnt;	937	SV **cb;
697	prev->stack->usecnt = 1;
698	}
699		938
700	/* has our stack been invalidated? */	939	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
701	if (next->stack && next->stack->gencnt != next->gencnt)
702	{	940	{
703	deallocate_stack (next);	941	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
704	allocate_stack (next, 1);	942
705	coro_create (&(next->stack->cctx),	943	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
706	continue_coro, (void *)next,	944	{
707	next->stack->sptr, labs (next->stack->ssize));	945	runops_proc_t old_runops = PL_runops;
		946	dSP;
		947	GV *gv = CvGV (cx->blk_sub.cv);
		948	SV *fullname = sv_2mortal (newSV (0));
		949
		950	if (isGV (gv))
		951	gv_efullname3 (fullname, gv, 0);
		952
		953	PL_runops = RUNOPS_DEFAULT;
		954	ENTER;
		955	SAVETMPS;
		956	EXTEND (SP, 3);
		957	PUSHMARK (SP);
		958	PUSHs (&PL_sv_yes);
		959	PUSHs (fullname);
		960	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		961	PUTBACK;
		962	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		963	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		964	SPAGAIN;
		965	FREETMPS;
		966	LEAVE;
		967	PL_runops = runops_trace;
		968	}
		969
		970	oldcxix = cxstack_ix;
708	}	971	}
709		972
710	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	973	if (cctx->flags & CC_TRACE_LINE)
711	}
712
713	}
714	else if (next->tmps_ix == -2)
715	croak ("tried to transfer to running coroutine");
716	else
717	{
718	SAVE (prev, -1); /* first get rid of the old state */
719
720	if (flags & TRANSFER_SAVE_CCTXT)
721	{
722	if (!prev->stack)
723	allocate_stack (prev, 0);
724
725	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
726	{	974	{
727	setup_coro (next);	975	dSP;
728		976
729	prev->stack->refcnt++;	977	PL_runops = RUNOPS_DEFAULT;
730	prev->stack->usecnt++;	978	ENTER;
731	next->stack = prev->stack;	979	SAVETMPS;
732	next->gencnt = prev->gencnt;	980	EXTEND (SP, 3);
		981	PL_runops = RUNOPS_DEFAULT;
		982	PUSHMARK (SP);
		983	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		984	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		985	PUTBACK;
		986	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		987	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		988	SPAGAIN;
		989	FREETMPS;
		990	LEAVE;
		991	PL_runops = runops_trace;
733	}	992	}
734	else
735	{
736	allocate_stack (next, 1);
737	coro_create (&(next->stack->cctx),
738	setup_coro, (void *)next,
739	next->stack->sptr, labs (next->stack->ssize));
740	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741	}	993	}
742	}	994	}
743	else
744	setup_coro (next);
745	}	995	}
746	}	996	}
747		997
748	next->cursp = stacklevel;	998	TAINT_NOT;
		999	return 0;
749	}	1000	}
750		1001
		1002	/* inject a fake call to Coro::State::_cctx_init into the execution */
		1003	/* _cctx_init should be careful, as it could be called at almost any time */
		1004	/* during execution of a perl program */
		1005	static void NOINLINE
		1006	cctx_prepare (pTHX_ coro_cctx *cctx)
		1007	{
		1008	dSP;
		1009	LOGOP myop;
		1010
		1011	PL_top_env = &PL_start_env;
		1012
		1013	if (cctx->flags & CC_TRACE)
		1014	PL_runops = runops_trace;
		1015
		1016	Zero (&myop, 1, LOGOP);
		1017	myop.op_next = PL_op;
		1018	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		1019
		1020	PUSHMARK (SP);
		1021	EXTEND (SP, 2);
		1022	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		1023	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		1024	PUTBACK;
		1025	PL_op = (OP *)&myop;
		1026	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		1027	SPAGAIN;
		1028	}
		1029
		1030	/*
		1031	* this is a _very_ stripped down perl interpreter ;)
		1032	*/
		1033	static void
		1034	cctx_run (void *arg)
		1035	{
		1036	dTHX;
		1037
		1038	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		1039	UNLOCK;
		1040
		1041	/* we now skip the entersub that lead to transfer() */
		1042	PL_op = PL_op->op_next;
		1043
		1044	/* inject a fake subroutine call to cctx_init */
		1045	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1046
		1047	/* somebody or something will hit me for both perl_run and PL_restartop */
		1048	PL_restartop = PL_op;
		1049	perl_run (PL_curinterp);
		1050
		1051	/*
		1052	* If perl-run returns we assume exit() was being called or the coro
		1053	* fell off the end, which seems to be the only valid (non-bug)
		1054	* reason for perl_run to return. We try to exit by jumping to the
		1055	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1056	* coroutine as Coro has no such concept
		1057	*/
		1058	PL_top_env = main_top_env;
		1059	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1060	}
		1061
		1062	static coro_cctx *
		1063	cctx_new ()
		1064	{
		1065	coro_cctx *cctx;
		1066	void *stack_start;
		1067	size_t stack_size;
		1068
		1069	++cctx_count;
		1070
		1071	Newz (0, cctx, 1, coro_cctx);
		1072
		1073	#if HAVE_MMAP
		1074	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1075	/* mmap supposedly does allocate-on-write for us */
		1076	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1077
		1078	if (cctx->sptr != (void *)-1)
		1079	{
		1080	# if CORO_STACKGUARD
		1081	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1082	# endif
		1083	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1084	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1085	cctx->flags |= CC_MAPPED;
		1086	}
		1087	else
		1088	#endif
		1089	{
		1090	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1091	New (0, cctx->sptr, coro_stacksize, long);
		1092
		1093	if (!cctx->sptr)
		1094	{
		1095	perror ("FATAL: unable to allocate stack for coroutine");
		1096	_exit (EXIT_FAILURE);
		1097	}
		1098
		1099	stack_start = cctx->sptr;
		1100	stack_size = cctx->ssize;
		1101	}
		1102
		1103	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1104	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1105
		1106	return cctx;
		1107	}
		1108
		1109	static void
		1110	cctx_destroy (coro_cctx *cctx)
		1111	{
		1112	if (!cctx)
		1113	return;
		1114
		1115	--cctx_count;
		1116
		1117	#if CORO_USE_VALGRIND
		1118	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1119	#endif
		1120
		1121	#if HAVE_MMAP
		1122	if (cctx->flags & CC_MAPPED)
		1123	munmap (cctx->sptr, cctx->ssize);
		1124	else
		1125	#endif
		1126	Safefree (cctx->sptr);
		1127
		1128	Safefree (cctx);
		1129	}
		1130
		1131	/* wether this cctx should be destructed */
		1132	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1133
		1134	static coro_cctx *
		1135	cctx_get (pTHX)
		1136	{
		1137	while (expect_true (cctx_first))
		1138	{
		1139	coro_cctx *cctx = cctx_first;
		1140	cctx_first = cctx->next;
		1141	--cctx_idle;
		1142
		1143	if (expect_true (!CCTX_EXPIRED (cctx)))
		1144	return cctx;
		1145
		1146	cctx_destroy (cctx);
		1147	}
		1148
		1149	return cctx_new ();
		1150	}
		1151
		1152	static void
		1153	cctx_put (coro_cctx *cctx)
		1154	{
		1155	/* free another cctx if overlimit */
		1156	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1157	{
		1158	coro_cctx *first = cctx_first;
		1159	cctx_first = first->next;
		1160	--cctx_idle;
		1161
		1162	cctx_destroy (first);
		1163	}
		1164
		1165	++cctx_idle;
		1166	cctx->next = cctx_first;
		1167	cctx_first = cctx;
		1168	}
		1169
		1170	/** coroutine switching *****************************************************/
		1171
		1172	static void
		1173	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1174	{
		1175	if (expect_true (prev != next))
		1176	{
		1177	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1178	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1179
		1180	if (expect_false (next->flags & CF_RUNNING))
		1181	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1182
		1183	if (expect_false (next->flags & CF_DESTROYED))
		1184	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1185
		1186	#if !PERL_VERSION_ATLEAST (5,10,0)
		1187	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1188	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1189	#endif
		1190	}
		1191	}
		1192
		1193	/* always use the TRANSFER macro */
		1194	static void NOINLINE
		1195	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
		1196	{
		1197	dSTACKLEVEL;
		1198	static volatile int has_throw;
		1199
		1200	/* sometimes transfer is only called to set idle_sp */
		1201	if (expect_false (!next))
		1202	{
		1203	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1204	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1205	}
		1206	else if (expect_true (prev != next))
		1207	{
		1208	coro_cctx *prev__cctx;
		1209
		1210	if (expect_false (prev->flags & CF_NEW))
		1211	{
		1212	/* create a new empty context */
		1213	Newz (0, prev->cctx, 1, coro_cctx);
		1214	prev->flags &= ~CF_NEW;
		1215	prev->flags |= CF_RUNNING;
		1216	}
		1217
		1218	prev->flags &= ~CF_RUNNING;
		1219	next->flags |= CF_RUNNING;
		1220
		1221	LOCK;
		1222
		1223	/* first get rid of the old state */
		1224	save_perl (aTHX_ prev);
		1225
		1226	if (expect_false (next->flags & CF_NEW))
		1227	{
		1228	/* need to start coroutine */
		1229	next->flags &= ~CF_NEW;
		1230	/* setup coroutine call */
		1231	coro_setup (aTHX_ next);
		1232	}
		1233	else
		1234	load_perl (aTHX_ next);
		1235
		1236	prev__cctx = prev->cctx;
		1237
		1238	/* possibly "free" the cctx */
		1239	if (expect_true (
		1240	prev__cctx->idle_sp == STACKLEVEL
		1241	&& !(prev__cctx->flags & CC_TRACE)
		1242	&& !force_cctx
		1243	))
		1244	{
		1245	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1246	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1247
		1248	prev->cctx = 0;
		1249
		1250	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1251	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1252	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1253	if (!next->cctx)
		1254	next->cctx = cctx_get (aTHX);
		1255
		1256	cctx_put (prev__cctx);
		1257	}
		1258
		1259	++next->usecount;
		1260
		1261	if (expect_true (!next->cctx))
		1262	next->cctx = cctx_get (aTHX);
		1263
		1264	has_throw = !!next->throw;
		1265
		1266	if (expect_false (prev__cctx != next->cctx))
		1267	{
		1268	prev__cctx->top_env = PL_top_env;
		1269	PL_top_env = next->cctx->top_env;
		1270	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1271	}
		1272
		1273	free_coro_mortal (aTHX);
		1274	UNLOCK;
		1275
		1276	if (expect_false (has_throw))
		1277	{
		1278	struct coro *coro = SvSTATE (coro_current);
		1279
		1280	if (coro->throw)
		1281	{
		1282	SV *exception = coro->throw;
		1283	coro->throw = 0;
		1284	sv_setsv (ERRSV, exception);
		1285	croak (0);
		1286	}
		1287	}
		1288	}
		1289	}
		1290
		1291	struct transfer_args
		1292	{
		1293	struct coro *prev, *next;
		1294	};
		1295
		1296	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1297	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1298
		1299	/** high level stuff ********************************************************/
		1300
		1301	static int
		1302	coro_state_destroy (pTHX_ struct coro *coro)
		1303	{
		1304	if (coro->flags & CF_DESTROYED)
		1305	return 0;
		1306
		1307	coro->flags |= CF_DESTROYED;
		1308
		1309	if (coro->flags & CF_READY)
		1310	{
		1311	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1312	/* alternative: look through all ready queues and remove the coro */
		1313	LOCK;
		1314	--coro_nready;
		1315	UNLOCK;
		1316	}
		1317	else
		1318	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1319
		1320	if (coro->mainstack && coro->mainstack != main_mainstack)
		1321	{
		1322	struct coro temp;
		1323
		1324	if (coro->flags & CF_RUNNING)
		1325	croak ("FATAL: tried to destroy currently running coroutine");
		1326
		1327	save_perl (aTHX_ &temp);
		1328	load_perl (aTHX_ coro);
		1329
		1330	coro_destroy (aTHX_ coro);
		1331
		1332	load_perl (aTHX_ &temp);
		1333
		1334	coro->slot = 0;
		1335	}
		1336
		1337	cctx_destroy (coro->cctx);
		1338	SvREFCNT_dec (coro->args);
		1339
		1340	if (coro->next) coro->next->prev = coro->prev;
		1341	if (coro->prev) coro->prev->next = coro->next;
		1342	if (coro == coro_first) coro_first = coro->next;
		1343
		1344	return 1;
		1345	}
		1346
		1347	static int
		1348	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1349	{
		1350	struct coro *coro = (struct coro *)mg->mg_ptr;
		1351	mg->mg_ptr = 0;
		1352
		1353	coro->hv = 0;
		1354
		1355	if (--coro->refcnt < 0)
		1356	{
		1357	coro_state_destroy (aTHX_ coro);
		1358	Safefree (coro);
		1359	}
		1360
		1361	return 0;
		1362	}
		1363
		1364	static int
		1365	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1366	{
		1367	struct coro *coro = (struct coro *)mg->mg_ptr;
		1368
		1369	++coro->refcnt;
		1370
		1371	return 0;
		1372	}
		1373
		1374	static MGVTBL coro_state_vtbl = {
		1375	0, 0, 0, 0,
		1376	coro_state_free,
		1377	0,
		1378	#ifdef MGf_DUP
		1379	coro_state_dup,
		1380	#else
		1381	# define MGf_DUP 0
		1382	#endif
		1383	};
		1384
		1385	static void
		1386	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1387	{
		1388	ta->prev = SvSTATE (prev_sv);
		1389	ta->next = SvSTATE (next_sv);
		1390	TRANSFER_CHECK (*ta);
		1391	}
		1392
		1393	static void
		1394	api_transfer (SV *prev_sv, SV *next_sv)
		1395	{
		1396	dTHX;
		1397	struct transfer_args ta;
		1398
		1399	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1400	TRANSFER (ta, 1);
		1401	}
		1402
		1403	/** Coro ********************************************************************/
		1404
		1405	static void
		1406	coro_enq (pTHX_ SV *coro_sv)
		1407	{
		1408	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1409	}
		1410
		1411	static SV *
		1412	coro_deq (pTHX)
		1413	{
		1414	int prio;
		1415
		1416	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1417	if (AvFILLp (coro_ready [prio]) >= 0)
		1418	return av_shift (coro_ready [prio]);
		1419
		1420	return 0;
		1421	}
		1422
		1423	static int
		1424	api_ready (SV *coro_sv)
		1425	{
		1426	dTHX;
		1427	struct coro *coro;
		1428	SV *sv_hook;
		1429	void (*xs_hook)(void);
		1430
		1431	if (SvROK (coro_sv))
		1432	coro_sv = SvRV (coro_sv);
		1433
		1434	coro = SvSTATE (coro_sv);
		1435
		1436	if (coro->flags & CF_READY)
		1437	return 0;
		1438
		1439	coro->flags |= CF_READY;
		1440
		1441	LOCK;
		1442
		1443	sv_hook = coro_nready ? 0 : coro_readyhook;
		1444	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1445
		1446	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1447	++coro_nready;
		1448
		1449	UNLOCK;
		1450
		1451	if (sv_hook)
		1452	{
		1453	dSP;
		1454
		1455	ENTER;
		1456	SAVETMPS;
		1457
		1458	PUSHMARK (SP);
		1459	PUTBACK;
		1460	call_sv (sv_hook, G_DISCARD);
		1461	SPAGAIN;
		1462
		1463	FREETMPS;
		1464	LEAVE;
		1465	}
		1466
		1467	if (xs_hook)
		1468	xs_hook ();
		1469
		1470	return 1;
		1471	}
		1472
		1473	static int
		1474	api_is_ready (SV *coro_sv)
		1475	{
		1476	dTHX;
		1477	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1478	}
		1479
		1480	static void
		1481	prepare_schedule (pTHX_ struct transfer_args *ta)
		1482	{
		1483	SV *prev_sv, *next_sv;
		1484
		1485	for (;;)
		1486	{
		1487	LOCK;
		1488	next_sv = coro_deq (aTHX);
		1489
		1490	/* nothing to schedule: call the idle handler */
		1491	if (expect_false (!next_sv))
		1492	{
		1493	dSP;
		1494	UNLOCK;
		1495
		1496	ENTER;
		1497	SAVETMPS;
		1498
		1499	PUSHMARK (SP);
		1500	PUTBACK;
		1501	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1502	SPAGAIN;
		1503
		1504	FREETMPS;
		1505	LEAVE;
		1506	continue;
		1507	}
		1508
		1509	ta->next = SvSTATE (next_sv);
		1510
		1511	/* cannot transfer to destroyed coros, skip and look for next */
		1512	if (expect_false (ta->next->flags & CF_DESTROYED))
		1513	{
		1514	UNLOCK;
		1515	SvREFCNT_dec (next_sv);
		1516	/* coro_nready is already taken care of by destroy */
		1517	continue;
		1518	}
		1519
		1520	--coro_nready;
		1521	UNLOCK;
		1522	break;
		1523	}
		1524
		1525	/* free this only after the transfer */
		1526	prev_sv = SvRV (coro_current);
		1527	ta->prev = SvSTATE (prev_sv);
		1528	TRANSFER_CHECK (*ta);
		1529	assert (ta->next->flags & CF_READY);
		1530	ta->next->flags &= ~CF_READY;
		1531	SvRV_set (coro_current, next_sv);
		1532
		1533	LOCK;
		1534	free_coro_mortal (aTHX);
		1535	coro_mortal = prev_sv;
		1536	UNLOCK;
		1537	}
		1538
		1539	static void
		1540	prepare_cede (pTHX_ struct transfer_args *ta)
		1541	{
		1542	api_ready (coro_current);
		1543	prepare_schedule (aTHX_ ta);
		1544	}
		1545
		1546	static int
		1547	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1548	{
		1549	if (coro_nready)
		1550	{
		1551	SV *prev = SvRV (coro_current);
		1552	prepare_schedule (aTHX_ ta);
		1553	api_ready (prev);
		1554	return 1;
		1555	}
		1556	else
		1557	return 0;
		1558	}
		1559
		1560	static void
		1561	api_schedule (void)
		1562	{
		1563	dTHX;
		1564	struct transfer_args ta;
		1565
		1566	prepare_schedule (aTHX_ &ta);
		1567	TRANSFER (ta, 1);
		1568	}
		1569
		1570	static int
		1571	api_cede (void)
		1572	{
		1573	dTHX;
		1574	struct transfer_args ta;
		1575
		1576	prepare_cede (aTHX_ &ta);
		1577
		1578	if (expect_true (ta.prev != ta.next))
		1579	{
		1580	TRANSFER (ta, 1);
		1581	return 1;
		1582	}
		1583	else
		1584	return 0;
		1585	}
		1586
		1587	static int
		1588	api_cede_notself (void)
		1589	{
		1590	dTHX;
		1591	struct transfer_args ta;
		1592
		1593	if (prepare_cede_notself (aTHX_ &ta))
		1594	{
		1595	TRANSFER (ta, 1);
		1596	return 1;
		1597	}
		1598	else
		1599	return 0;
		1600	}
		1601
		1602	static void
		1603	api_trace (SV *coro_sv, int flags)
		1604	{
		1605	dTHX;
		1606	struct coro *coro = SvSTATE (coro_sv);
		1607
		1608	if (flags & CC_TRACE)
		1609	{
		1610	if (!coro->cctx)
		1611	coro->cctx = cctx_new ();
		1612	else if (!(coro->cctx->flags & CC_TRACE))
		1613	croak ("cannot enable tracing on coroutine with custom stack");
		1614
		1615	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1616	}
		1617	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1618	{
		1619	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1620
		1621	if (coro->flags & CF_RUNNING)
		1622	PL_runops = RUNOPS_DEFAULT;
		1623	else
		1624	coro->slot->runops = RUNOPS_DEFAULT;
		1625	}
		1626	}
		1627
751	MODULE = Coro::State PACKAGE = Coro::State	1628	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
752		1629
753	PROTOTYPES: ENABLE	1630	PROTOTYPES: DISABLE
754		1631
755	BOOT:	1632	BOOT:
756	{ /* {} necessary for stoopid perl-5.6.x */	1633	{
757	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1634	#ifdef USE_ITHREADS
758	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1635	MUTEX_INIT (&coro_mutex);
		1636	#endif
		1637	BOOT_PAGESIZE;
		1638
		1639	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1640	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1641
		1642	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1643	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1644	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1645
		1646	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1647	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1648	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1649
759	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1650	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
760		1651
761	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1652	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
762	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1653	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
763	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1654	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
764	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1655	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
765
766	if (!padlist_cache)
767	padlist_cache = newHV ();
768		1656
769	main_mainstack = PL_mainstack;	1657	main_mainstack = PL_mainstack;
770	}	1658	main_top_env = PL_top_env;
771		1659
772	Coro::State	1660	while (main_top_env->je_prev)
773	_newprocess(args)	1661	main_top_env = main_top_env->je_prev;
774	SV * args	1662
775	PROTOTYPE: $	1663	coroapi.ver = CORO_API_VERSION;
		1664	coroapi.rev = CORO_API_REVISION;
		1665	coroapi.transfer = api_transfer;
		1666
		1667	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1668	}
		1669
		1670	SV *
		1671	new (char *klass, ...)
776	CODE:	1672	CODE:
777	Coro__State coro;	1673	{
		1674	struct coro *coro;
		1675	MAGIC *mg;
		1676	HV *hv;
		1677	int i;
778		1678
779	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
780	croak ("Coro::State::_newprocess expects an arrayref");
781
782	New (0, coro, 1, struct coro);	1679	Newz (0, coro, 1, struct coro);
		1680	coro->args = newAV ();
		1681	coro->flags = CF_NEW;
783		1682
784	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1683	if (coro_first) coro_first->prev = coro;
785	coro->mainstack = 0; /* actual work is done inside transfer */	1684	coro->next = coro_first;
786	coro->stack = 0;	1685	coro_first = coro;
787		1686
788	RETVAL = coro;	1687	coro->hv = hv = newHV ();
		1688	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1689	mg->mg_flags |= MGf_DUP;
		1690	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1691
		1692	av_extend (coro->args, items - 1);
		1693	for (i = 1; i < items; i++)
		1694	av_push (coro->args, newSVsv (ST (i)));
		1695	}
789	OUTPUT:	1696	OUTPUT:
790	RETVAL	1697	RETVAL
791		1698
		1699	# these not obviously related functions are all rolled into the same xs
		1700	# function to increase chances that they all will call transfer with the same
		1701	# stack offset
792	void	1702	void
793	transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK)	1703	_set_stacklevel (...)
794	Coro::State_or_hashref prev	1704	ALIAS:
795	Coro::State_or_hashref next	1705	Coro::State::transfer = 1
796	int flags	1706	Coro::schedule = 2
797	PROTOTYPE: @	1707	Coro::cede = 3
		1708	Coro::cede_notself = 4
798	CODE:	1709	CODE:
799	transfer (aTHX_ prev, next, flags);	1710	{
		1711	struct transfer_args ta;
		1712
		1713	PUTBACK;
		1714	switch (ix)
		1715	{
		1716	case 0:
		1717	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1718	ta.next = 0;
		1719	break;
		1720
		1721	case 1:
		1722	if (items != 2)
		1723	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1724
		1725	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1726	break;
		1727
		1728	case 2:
		1729	prepare_schedule (aTHX_ &ta);
		1730	break;
		1731
		1732	case 3:
		1733	prepare_cede (aTHX_ &ta);
		1734	break;
		1735
		1736	case 4:
		1737	if (!prepare_cede_notself (aTHX_ &ta))
		1738	XSRETURN_EMPTY;
		1739
		1740	break;
		1741	}
		1742	SPAGAIN;
		1743
		1744	BARRIER;
		1745	PUTBACK;
		1746	TRANSFER (ta, 0);
		1747	SPAGAIN; /* might be the sp of a different coroutine now */
		1748	/* be extra careful not to ever do anything after TRANSFER */
		1749	}
		1750
		1751	bool
		1752	_destroy (SV *coro_sv)
		1753	CODE:
		1754	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1755	OUTPUT:
		1756	RETVAL
800		1757
801	void	1758	void
802	DESTROY(coro)	1759	_exit (int code)
803	Coro::State coro	1760	PROTOTYPE: $
804	CODE:	1761	CODE:
		1762	_exit (code);
805		1763
806	if (coro->mainstack && coro->mainstack != main_mainstack)	1764	int
		1765	cctx_stacksize (int new_stacksize = 0)
		1766	CODE:
		1767	RETVAL = coro_stacksize;
		1768	if (new_stacksize)
		1769	coro_stacksize = new_stacksize;
		1770	OUTPUT:
		1771	RETVAL
		1772
		1773	int
		1774	cctx_count ()
		1775	CODE:
		1776	RETVAL = cctx_count;
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	int
		1781	cctx_idle ()
		1782	CODE:
		1783	RETVAL = cctx_idle;
		1784	OUTPUT:
		1785	RETVAL
		1786
		1787	void
		1788	list ()
		1789	PPCODE:
		1790	{
		1791	struct coro *coro;
		1792	for (coro = coro_first; coro; coro = coro->next)
		1793	if (coro->hv)
		1794	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1795	}
		1796
		1797	void
		1798	call (Coro::State coro, SV *coderef)
		1799	ALIAS:
		1800	eval = 1
		1801	CODE:
		1802	{
		1803	if (coro->mainstack)
807	{	1804	{
808	struct coro temp;	1805	struct coro temp;
809		1806
810	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1807	if (!(coro->flags & CF_RUNNING))
811	LOAD(aTHX_ coro);	1808	{
		1809	PUTBACK;
		1810	save_perl (aTHX_ &temp);
		1811	load_perl (aTHX_ coro);
		1812	}
812		1813
813	destroy_stacks (aTHX);	1814	{
		1815	dSP;
		1816	ENTER;
		1817	SAVETMPS;
		1818	PUTBACK;
		1819	PUSHSTACK;
		1820	PUSHMARK (SP);
814		1821
815	LOAD((&temp)); /* this will get rid of defsv etc.. */	1822	if (ix)
		1823	eval_sv (coderef, 0);
		1824	else
		1825	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
816		1826
817	coro->mainstack = 0;	1827	POPSTACK;
		1828	SPAGAIN;
		1829	FREETMPS;
		1830	LEAVE;
		1831	PUTBACK;
		1832	}
		1833
		1834	if (!(coro->flags & CF_RUNNING))
		1835	{
		1836	save_perl (aTHX_ coro);
		1837	load_perl (aTHX_ &temp);
		1838	SPAGAIN;
		1839	}
818	}	1840	}
		1841	}
819		1842
820	deallocate_stack (coro);	1843	SV *
821		1844	is_ready (Coro::State coro)
822	Safefree (coro);	1845	PROTOTYPE: $
		1846	ALIAS:
		1847	is_ready = CF_READY
		1848	is_running = CF_RUNNING
		1849	is_new = CF_NEW
		1850	is_destroyed = CF_DESTROYED
		1851	CODE:
		1852	RETVAL = boolSV (coro->flags & ix);
		1853	OUTPUT:
		1854	RETVAL
823		1855
824	void	1856	void
825	flush()	1857	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1858
		1859	SV *
		1860	has_cctx (Coro::State coro)
		1861	PROTOTYPE: $
826	CODE:	1862	CODE:
827	#ifdef MAY_FLUSH	1863	RETVAL = boolSV (!!coro->cctx);
828	flush_padlist_cache ();	1864	OUTPUT:
829	#endif	1865	RETVAL
830		1866
831	MODULE = Coro::State PACKAGE = Coro::Cont	1867	int
		1868	is_traced (Coro::State coro)
		1869	PROTOTYPE: $
		1870	CODE:
		1871	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1872	OUTPUT:
		1873	RETVAL
832		1874
833	# this is slightly dirty	1875	IV
		1876	rss (Coro::State coro)
		1877	PROTOTYPE: $
		1878	ALIAS:
		1879	usecount = 1
		1880	CODE:
		1881	switch (ix)
		1882	{
		1883	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1884	case 1: RETVAL = coro->usecount; break;
		1885	}
		1886	OUTPUT:
		1887	RETVAL
834		1888
835	void	1889	void
836	yield(...)	1890	force_cctx ()
		1891	CODE:
		1892	struct coro *coro = SvSTATE (coro_current);
		1893	coro->cctx->idle_sp = 0;
		1894
		1895	MODULE = Coro::State PACKAGE = Coro
		1896
		1897	BOOT:
		1898	{
		1899	int i;
		1900
		1901	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1902	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1903	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1904
		1905	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1906	SvREADONLY_on (coro_current);
		1907
		1908	coro_stash = gv_stashpv ("Coro", TRUE);
		1909
		1910	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1911	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1912	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1913	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1914	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1915	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1916
		1917	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1918	coro_ready[i] = newAV ();
		1919
		1920	{
		1921	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1922	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
		1923
		1924	coroapi.schedule = api_schedule;
		1925	coroapi.cede = api_cede;
		1926	coroapi.cede_notself = api_cede_notself;
		1927	coroapi.ready = api_ready;
		1928	coroapi.is_ready = api_is_ready;
		1929	coroapi.nready = &coro_nready;
		1930	coroapi.current = coro_current;
		1931
		1932	GCoroAPI = &coroapi;
		1933	sv_setiv (sv, (IV)&coroapi);
		1934	SvREADONLY_on (sv);
		1935	}
		1936	}
		1937
		1938	void
		1939	_set_current (SV *current)
		1940	PROTOTYPE: $
		1941	CODE:
		1942	SvREFCNT_dec (SvRV (coro_current));
		1943	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1944
		1945	void
		1946	_set_readyhook (SV *hook)
		1947	PROTOTYPE: $
		1948	CODE:
		1949	LOCK;
		1950	SvREFCNT_dec (coro_readyhook);
		1951	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1952	UNLOCK;
		1953
		1954	int
		1955	prio (Coro::State coro, int newprio = 0)
		1956	ALIAS:
		1957	nice = 1
		1958	CODE:
		1959	{
		1960	RETVAL = coro->prio;
		1961
		1962	if (items > 1)
		1963	{
		1964	if (ix)
		1965	newprio = coro->prio - newprio;
		1966
		1967	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1968	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1969
		1970	coro->prio = newprio;
		1971	}
		1972	}
		1973	OUTPUT:
		1974	RETVAL
		1975
		1976	SV *
		1977	ready (SV *self)
		1978	PROTOTYPE: $
		1979	CODE:
		1980	RETVAL = boolSV (api_ready (self));
		1981	OUTPUT:
		1982	RETVAL
		1983
		1984	int
		1985	nready (...)
		1986	PROTOTYPE:
		1987	CODE:
		1988	RETVAL = coro_nready;
		1989	OUTPUT:
		1990	RETVAL
		1991
		1992	void
		1993	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1994	PROTOTYPE: $;$
		1995	CODE:
		1996	SvREFCNT_dec (self->throw);
		1997	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1998
		1999	void
		2000	swap_defsv (Coro::State self)
		2001	PROTOTYPE: $
		2002	ALIAS:
		2003	swap_defav = 1
		2004	CODE:
		2005	if (!self->slot)
		2006	croak ("cannot swap state with coroutine that has no saved state");
		2007	else
		2008	{
		2009	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		2010	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		2011
		2012	SV *tmp = *src; *src = *dst; *dst = tmp;
		2013	}
		2014
		2015	# for async_pool speedup
		2016	void
		2017	_pool_1 (SV *cb)
		2018	CODE:
		2019	{
		2020	struct coro *coro = SvSTATE (coro_current);
		2021	HV *hv = (HV *)SvRV (coro_current);
		2022	AV *defav = GvAV (PL_defgv);
		2023	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2024	AV *invoke_av;
		2025	int i, len;
		2026
		2027	if (!invoke)
		2028	{
		2029	SV *old = PL_diehook;
		2030	PL_diehook = 0;
		2031	SvREFCNT_dec (old);
		2032	croak ("\3async_pool terminate\2\n");
		2033	}
		2034
		2035	SvREFCNT_dec (coro->saved_deffh);
		2036	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2037
		2038	hv_store (hv, "desc", sizeof ("desc") - 1,
		2039	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2040
		2041	invoke_av = (AV *)SvRV (invoke);
		2042	len = av_len (invoke_av);
		2043
		2044	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2045
		2046	if (len > 0)
		2047	{
		2048	av_fill (defav, len - 1);
		2049	for (i = 0; i < len; ++i)
		2050	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2051	}
		2052
		2053	SvREFCNT_dec (invoke);
		2054	}
		2055
		2056	void
		2057	_pool_2 (SV *cb)
		2058	CODE:
		2059	{
		2060	struct coro *coro = SvSTATE (coro_current);
		2061
		2062	sv_setsv (cb, &PL_sv_undef);
		2063
		2064	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		2065	coro->saved_deffh = 0;
		2066
		2067	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2068	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2069	{
		2070	SV *old = PL_diehook;
		2071	PL_diehook = 0;
		2072	SvREFCNT_dec (old);
		2073	croak ("\3async_pool terminate\2\n");
		2074	}
		2075
		2076	av_clear (GvAV (PL_defgv));
		2077	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2078	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2079
		2080	coro->prio = 0;
		2081
		2082	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2083	api_trace (coro_current, 0);
		2084
		2085	av_push (av_async_pool, newSVsv (coro_current));
		2086	}
		2087
		2088
		2089	MODULE = Coro::State PACKAGE = Coro::AIO
		2090
		2091	SV *
		2092	_get_state ()
		2093	CODE:
		2094	{
		2095	struct io_state *data;
		2096
		2097	RETVAL = newSV (sizeof (struct io_state));
		2098	data = (struct io_state *)SvPVX (RETVAL);
		2099	SvCUR_set (RETVAL, sizeof (struct io_state));
		2100	SvPOK_only (RETVAL);
		2101
		2102	data->errorno = errno;
		2103	data->laststype = PL_laststype;
		2104	data->laststatval = PL_laststatval;
		2105	data->statcache = PL_statcache;
		2106	}
		2107	OUTPUT:
		2108	RETVAL
		2109
		2110	void
		2111	_set_state (char *data_)
		2112	PROTOTYPE: $
		2113	CODE:
		2114	{
		2115	struct io_state *data = (void *)data_;
		2116
		2117	errno = data->errorno;
		2118	PL_laststype = data->laststype;
		2119	PL_laststatval = data->laststatval;
		2120	PL_statcache = data->statcache;
		2121	}
		2122
		2123
		2124	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2125
		2126	BOOT:
		2127	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2128
		2129	SV *
		2130	_schedule (...)
837	PROTOTYPE: @	2131	PROTOTYPE: @
838	CODE:	2132	CODE:
839	static SV *returnstk;	2133	{
840	SV *sv;	2134	static int incede;
841	AV *defav = GvAV (PL_defgv);
842	struct coro *prev, *next;
843		2135
844	if (!returnstk)	2136	api_cede_notself ();
845	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
846		2137
847	/* set up @_ -- ugly */	2138	++incede;
848	av_clear (defav);	2139	while (coro_nready >= incede && api_cede ())
849	av_fill (defav, items - 1);	2140	;
850	while (items--)
851	av_store (defav, items, SvREFCNT_inc (ST(items)));
852		2141
853	mg_get (returnstk); /* isn't documentation wrong for mg_get? */	2142	sv_setsv (sv_activity, &PL_sv_undef);
854	sv = av_pop ((AV *)SvRV (returnstk));	2143	if (coro_nready >= incede)
855	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));	2144	{
856	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));	2145	PUSHMARK (SP);
857	SvREFCNT_dec (sv);	2146	PUTBACK;
		2147	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
		2148	SPAGAIN;
		2149	}
858		2150
859	transfer(aTHX_ prev, next, 0);	2151	--incede;
		2152	}
860		2153

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