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Comparing Coro/Coro/State.xs (file contents):
Revision 1.59 by root, Mon Jul 19 01:32:27 2004 UTC vs.
Revision 1.219 by root, Tue Dec 4 19:33:45 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#if PATCHLEVEL < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
		16
		17	#ifdef HAVE_MMAP
		18	# include <unistd.h>
		19	# include <sys/mman.h>
		20	# ifndef MAP_ANONYMOUS
		21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
		23	# else
		24	# undef HAVE_MMAP
		25	# endif
		26	# endif
		27	# include <limits.h>
		28	# ifndef PAGESIZE
		29	# define PAGESIZE pagesize
		30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		31	static long pagesize;
		32	# else
		33	# define BOOT_PAGESIZE (void)0
		34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
		39
		40	#if CORO_USE_VALGRIND
		41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	|| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
10	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
12	# endif	59	# endif
13	# ifndef call_sv	60	# ifndef call_sv
14	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
27	# endif	74	# endif
28	#endif	75	#endif
29		76
30	#include "libcoro/coro.c"	77	/* 5.8.7 */
31		78	#ifndef SvRV_set
32	#include <signal.h>	79	# define SvRV_set(s,v) SvRV(s) = (v)
33
34	#ifdef HAVE_MMAP
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	80	#endif
44	#endif
45		81
46	#define SUB_INIT "Coro::State::initialize"	82	/* 5.8.8 */
47	#define UCORO_STATE "_coro_state"	83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
48		89
49	/* The next macro should declare a variable stacklevel that contains and approximation	90	#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	91	# undef CORO_STACKGUARD
51	* and should be unique. */	92	#endif
		93
		94	#ifndef CORO_STACKGUARD
		95	# define CORO_STACKGUARD 0
		96	#endif
		97
		98	/* prefer perl internal functions over our own? */
		99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
		102
		103	/* The next macros try to return the current stack pointer, in an as
		104	* portable way as possible. */
		105	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	106	#define STACKLEVEL ((void *)&stacklevel)
53		107
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		109
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	110	#if __GNUC__ >= 3
		111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
		114	#else
		115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
		118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
		122
		123	#define NOINLINE attribute ((noinline))
57		124
58	#include "CoroAPI.h"	125	#include "CoroAPI.h"
59		126
60	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	131	#else
65	# define LOCK 0	132	# define LOCK (void)0
66	# define UNLOCK 0	133	# define UNLOCK (void)0
67	#endif	134	#endif
68		135
		136	/* helper storage struct for Coro::AIO */
		137	struct io_state
		138	{
		139	int errorno;
		140	I32 laststype;
		141	int laststatval;
		142	Stat_t statcache;
		143	};
		144
		145	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	147	static AV *main_mainstack; /* used to differentiate between $main and others */
		148	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	149	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 */	150	static volatile SV *coro_mortal; /* will be freed after next transfer */
75		151
76	/* this is actually not only the c stack but also c registers etc... */	152	static GV *irsgv; /* $/ */
		153	static GV *stdoutgv; /* *STDOUT */
		154	static SV *rv_diehook;
		155	static SV *rv_warnhook;
		156	static HV *hv_sig; /* %SIG */
		157
		158	/* async_pool helper stuff */
		159	static SV *sv_pool_rss;
		160	static SV *sv_pool_size;
		161	static AV *av_async_pool;
		162
		163	static struct coro_cctx *cctx_first;
		164	static int cctx_count, cctx_idle;
		165
		166	enum {
		167	CC_MAPPED = 0x01,
		168	CC_NOREUSE = 0x02, /* throw this away after tracing */
		169	CC_TRACE = 0x04,
		170	CC_TRACE_SUB = 0x08, /* trace sub calls */
		171	CC_TRACE_LINE = 0x10, /* trace each statement */
		172	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		173	};
		174
		175	/* this is a structure representing a c-level coroutine */
		176	typedef struct coro_cctx {
		177	struct coro_cctx *next;
		178
		179	/* the stack */
		180	void *sptr;
		181	size_t ssize;
		182
		183	/* cpu state */
		184	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		185	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		186	JMPENV *top_env;
		187	coro_context cctx;
		188
		189	#if CORO_USE_VALGRIND
		190	int valgrind_id;
		191	#endif
		192	unsigned char flags;
		193	} coro_cctx;
		194
		195	enum {
		196	CF_RUNNING = 0x0001, /* coroutine is running */
		197	CF_READY = 0x0002, /* coroutine is ready */
		198	CF_NEW = 0x0004, /* has never been switched to */
		199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		200	};
		201
		202	/* the structure where most of the perl state is stored, overlaid on the cxstack */
77	typedef struct {	203	typedef struct {
78	int refcnt; /* pointer reference counter */	204	SV *defsv;
79	int usecnt; /* shared by how many coroutines */	205	AV *defav;
80	int gencnt; /* generation counter */	206	SV *errsv;
		207	SV *irsgv;
		208	#define VAR(name,type) type name;
		209	# include "state.h"
		210	#undef VAR
		211	} perl_slots;
81		212
82	coro_context cctx;	213	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83		214
84	void *sptr;	215	/* this is a structure representing a perl-level coroutine */
85	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87
88	struct coro {	216	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	217	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	218	coro_cctx *cctx;
91		219
92	/* the optional C context */	220	/* 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;	221	AV *mainstack;
110	SV **stack_sp;	222	perl_slots *slot; /* basically the saved sp */
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	SV **stack_base;
115	SV **stack_max;
116	SV **tmps_stack;
117	I32 tmps_floor;
118	I32 tmps_ix;
119	I32 tmps_max;
120	I32 *markstack;
121	I32 *markstack_ptr;
122	I32 *markstack_max;
123	I32 *scopestack;
124	I32 scopestack_ix;
125	I32 scopestack_max;
126	ANY *savestack;
127	I32 savestack_ix;
128	I32 savestack_max;
129	OP **retstack;
130	I32 retstack_ix;
131	I32 retstack_max;
132	COP *curcop;
133	JMPENV *top_env;
134		223
135	/* data associated with this coroutine (initial args) */	224	AV *args; /* data associated with this coroutine (initial args) */
136	AV *args;	225	int refcnt; /* coroutines are refcounted, yes */
		226	int flags; /* CF_ flags */
		227	HV *hv; /* the perl hash associated with this coro, if any */
		228
		229	/* statistics */
		230	int usecount; /* number of transfers to this coro */
		231
		232	/* coro process data */
		233	int prio;
		234	SV *throw; /* exception to be thrown */
		235
		236	/* async_pool */
		237	SV *saved_deffh;
		238
		239	/* linked list */
		240	struct coro *next, *prev;
137	};	241	};
138		242
139	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
141		245
142	/* mostly copied from op.c:cv_clone2 */	246	/** Coro ********************************************************************/
143	STATIC AV *	247
144	clone_padlist (pTHX_ AV *protopadlist)	248	#define PRIO_MAX 3
		249	#define PRIO_HIGH 1
		250	#define PRIO_NORMAL 0
		251	#define PRIO_LOW -1
		252	#define PRIO_IDLE -3
		253	#define PRIO_MIN -4
		254
		255	/* for Coro.pm */
		256	static SV *coro_current;
		257	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		258	static int coro_nready;
		259	static struct coro *coro_first;
		260
		261	/** lowlevel stuff **********************************************************/
		262
		263	static SV *
		264	coro_get_sv (pTHX_ const char *name, int create)
145	{	265	{
146	AV *av;	266	#if PERL_VERSION_ATLEAST (5,9,0)
147	I32 ix;	267	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	268	get_sv (name, create);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	269	#endif
150	SV **pname = AvARRAY (protopad_name);	270	return get_sv (name, create);
151	SV **ppad = AvARRAY (protopad);	271	}
152	I32 fname = AvFILLp (protopad_name);	272
153	I32 fpad = AvFILLp (protopad);	273	static AV *
		274	coro_get_av (pTHX_ const char *name, int create)
		275	{
		276	#if PERL_VERSION_ATLEAST (5,9,0)
		277	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		278	get_av (name, create);
		279	#endif
		280	return get_av (name, create);
		281	}
		282
		283	static HV *
		284	coro_get_hv (pTHX_ const char *name, int create)
		285	{
		286	#if PERL_VERSION_ATLEAST (5,9,0)
		287	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		288	get_hv (name, create);
		289	#endif
		290	return get_hv (name, create);
		291	}
		292
		293	static AV *
		294	coro_clone_padlist (pTHX_ CV *cv)
		295	{
		296	AV *padlist = CvPADLIST (cv);
154	AV *newpadlist, *newpad_name, *newpad;	297	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		298
165	newpadlist = newAV ();	299	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	300	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	301	#if PERL_VERSION_ATLEAST (5,9,0)
		302	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		303	#else
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		305	#endif
		306	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		307	--AvFILLp (padlist);
		308
		309	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	310	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		311
239	return newpadlist;	312	return newpadlist;
240	}	313	}
241		314
242	STATIC void	315	static void
243	free_padlist (pTHX_ AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
244	{	317	{
245	/* may be during global destruction */	318	/* may be during global destruction */
246	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
247	{	320	{
…		…
261		334
262	SvREFCNT_dec ((SV*)padlist);	335	SvREFCNT_dec ((SV*)padlist);
263	}	336	}
264	}	337	}
265		338
266	STATIC int	339	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	340	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	341	{
269	AV *padlist;	342	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
271		344
272	/* casting is fun. */	345	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	347	free_padlist (aTHX_ padlist);
275	}
276		348
		349	return 0;
		350	}
		351
277	#define PERL_MAGIC_coro PERL_MAGIC_ext	352	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		353	#define CORO_MAGIC_type_state PERL_MAGIC_ext
278		354
279	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	355	static MGVTBL coro_cv_vtbl = {
		356	0, 0, 0, 0,
		357	coro_cv_free
		358	};
		359
		360	#define CORO_MAGIC(sv,type) \
		361	SvMAGIC (sv) \
		362	? SvMAGIC (sv)->mg_type == type \
		363	? SvMAGIC (sv) \
		364	: mg_find (sv, type) \
		365	: 0
		366
		367	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		368	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		369
		370	static struct coro *
		371	SvSTATE_ (pTHX_ SV *coro)
		372	{
		373	HV *stash;
		374	MAGIC *mg;
		375
		376	if (SvROK (coro))
		377	coro = SvRV (coro);
		378
		379	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		380	croak ("Coro::State object required");
		381
		382	stash = SvSTASH (coro);
		383	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		384	{
		385	/* very slow, but rare, check */
		386	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		387	croak ("Coro::State object required");
		388	}
		389
		390	mg = CORO_MAGIC_state (coro);
		391	return (struct coro *)mg->mg_ptr;
		392	}
		393
		394	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
280		395
281	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
282	STATIC void	397	static void
283	get_padlist (pTHX_ CV *cv)	398	get_padlist (pTHX_ CV *cv)
284	{	399	{
285	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
		401	AV *av;
286		402
287	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
288	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289	else	405	else
		406	{
		407	#if CORO_PREFER_PERL_FUNCTIONS
		408	/* this is probably cleaner, but also slower? */
		409	CV *cp = Perl_cv_clone (cv);
		410	CvPADLIST (cv) = CvPADLIST (cp);
		411	CvPADLIST (cp) = 0;
		412	SvREFCNT_dec (cp);
		413	#else
290	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		415	#endif
		416	}
291	}	417	}
292		418
293	STATIC void	419	static void
294	put_padlist (pTHX_ CV *cv)	420	put_padlist (pTHX_ CV *cv)
295	{	421	{
296	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
		423	AV *av;
297		424
298	if (!mg)	425	if (expect_false (!mg))
299	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
300	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
301	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302	mg->mg_virtual = &vtbl_coro;
303	mg->mg_obj = (SV *)newAV ();
304	}
305		427
306	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	428	av = (AV *)mg->mg_obj;
307	}
308		429
309	#define SB do {	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
310	#define SE } while (0)	431	av_extend (av, AvMAX (av) + 1);
311		432
312	#define LOAD(state) load_state(aTHX_ (state));	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
313	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	434	}
314		435
315	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	436	/** load & save, init *******************************************************/
316		437
317	static void	438	static void
318	load_state(pTHX_ Coro__State c)	439	load_perl (pTHX_ Coro__State c)
319	{	440	{
320	PL_dowarn = c->dowarn;	441	perl_slots *slot = c->slot;
321	PL_in_eval = c->in_eval;	442	c->slot = 0;
322		443
323	PL_curstackinfo = c->curstackinfo;
324	PL_curstack = c->curstack;
325	PL_mainstack = c->mainstack;	444	PL_mainstack = c->mainstack;
326	PL_stack_sp = c->stack_sp;
327	PL_op = c->op;
328	PL_curpad = c->curpad;
329	PL_comppad = c->comppad;
330	PL_stack_base = c->stack_base;
331	PL_stack_max = c->stack_max;
332	PL_tmps_stack = c->tmps_stack;
333	PL_tmps_floor = c->tmps_floor;
334	PL_tmps_ix = c->tmps_ix;
335	PL_tmps_max = c->tmps_max;
336	PL_markstack = c->markstack;
337	PL_markstack_ptr = c->markstack_ptr;
338	PL_markstack_max = c->markstack_max;
339	PL_scopestack = c->scopestack;
340	PL_scopestack_ix = c->scopestack_ix;
341	PL_scopestack_max = c->scopestack_max;
342	PL_savestack = c->savestack;
343	PL_savestack_ix = c->savestack_ix;
344	PL_savestack_max = c->savestack_max;
345	PL_retstack = c->retstack;
346	PL_retstack_ix = c->retstack_ix;
347	PL_retstack_max = c->retstack_max;
348	PL_curcop = c->curcop;
349	PL_top_env = c->top_env;
350		445
351	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	446	GvSV (PL_defgv) = slot->defsv;
352	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	447	GvAV (PL_defgv) = slot->defav;
353	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	448	GvSV (PL_errgv) = slot->errsv;
		449	GvSV (irsgv) = slot->irsgv;
		450
		451	#define VAR(name,type) PL_ ## name = slot->name;
		452	# include "state.h"
		453	#undef VAR
354		454
355	{	455	{
356	dSP;	456	dSP;
		457
357	CV *cv;	458	CV *cv;
358		459
359	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
360	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
361	{	462	{
362	AV *padlist = (AV *)POPs;
363
364	if (padlist)
365	{
366	put_padlist (aTHX_ cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
367	CvPADLIST(cv) = padlist;	464	CvDEPTH (cv) = PTR2IV (POPs);
368	}	465	CvPADLIST (cv) = (AV *)POPs;
369
370	++CvDEPTH(cv);
371	}	466	}
372		467
373	PUTBACK;	468	PUTBACK;
374	}	469	}
375	}	470	}
376		471
377	static void	472	static void
378	save_state(pTHX_ Coro__State c, int flags)	473	save_perl (pTHX_ Coro__State c)
379	{	474	{
380	{	475	{
381	dSP;	476	dSP;
382	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
383	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
386	/*	481	/*
387	* the worst thing you can imagine happens first - we have to save	482	* the worst thing you can imagine happens first - we have to save
388	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
389	*/	484	*/
390		485
391	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
392	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
393	for (;;)	488	for (;;)
394	{	489	{
395	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
396	{	491	{
397	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
398		493
399	if (CxTYPE(cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
400	{	495	{
401	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
		497
402	if (CvDEPTH(cv))	498	if (expect_true (CvDEPTH (cv)))
403	{	499	{
404	EXTEND (SP, CvDEPTH(cv)*2);	500	EXTEND (SP, 3);
405
406	while (--CvDEPTH(cv))
407	{
408	/* this tells the restore code to increment CvDEPTH */
409	PUSHs (Nullsv);
410	PUSHs ((SV *)cv);
411	}
412
413	PUSHs ((SV *)CvPADLIST(cv));	501	PUSHs ((SV *)CvPADLIST (cv));
		502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
414	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
415		504
		505	CvDEPTH (cv) = 0;
416	get_padlist (aTHX_ cv); /* this is a monster */	506	get_padlist (aTHX_ cv);
417	}	507	}
418	}	508	}
419	#ifdef CXt_FORMAT
420	else if (CxTYPE(cx) == CXt_FORMAT)
421	{
422	/* I never used formats, so how should I know how these are implemented? */
423	/* my bold guess is as a simple, plain sub... */
424	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
425	}
426	#endif
427	}	509	}
428		510
429	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
430	break;	512	break;
431		513
432	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
433	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
434	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
435	}	517	}
436		518
437	PUTBACK;	519	PUTBACK;
438	}	520	}
439		521
440	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
441	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
442	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	524	if (SLOT_COUNT >= 1) CXINC;
		525	if (SLOT_COUNT >= 2) CXINC;
		526	if (SLOT_COUNT >= 3) CXINC;
		527	{
		528	int i;
		529	for (i = 3; i < SLOT_COUNT; ++i)
		530	CXINC;
		531	}
		532	cxstack_ix -= SLOT_COUNT; /* undo allocation */
443		533
444	c->dowarn = PL_dowarn;
445	c->in_eval = PL_in_eval;
446
447	c->curstackinfo = PL_curstackinfo;
448	c->curstack = PL_curstack;
449	c->mainstack = PL_mainstack;	534	c->mainstack = PL_mainstack;
450	c->stack_sp = PL_stack_sp;	535
451	c->op = PL_op;	536	{
452	c->curpad = PL_curpad;	537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
453	c->comppad = PL_comppad;	538
454	c->stack_base = PL_stack_base;	539	slot->defav = GvAV (PL_defgv);
455	c->stack_max = PL_stack_max;	540	slot->defsv = DEFSV;
456	c->tmps_stack = PL_tmps_stack;	541	slot->errsv = ERRSV;
457	c->tmps_floor = PL_tmps_floor;	542	slot->irsgv = GvSV (irsgv);
458	c->tmps_ix = PL_tmps_ix;	543
459	c->tmps_max = PL_tmps_max;	544	#define VAR(name,type) slot->name = PL_ ## name;
460	c->markstack = PL_markstack;	545	# include "state.h"
461	c->markstack_ptr = PL_markstack_ptr;	546	#undef VAR
462	c->markstack_max = PL_markstack_max;	547	}
463	c->scopestack = PL_scopestack;
464	c->scopestack_ix = PL_scopestack_ix;
465	c->scopestack_max = PL_scopestack_max;
466	c->savestack = PL_savestack;
467	c->savestack_ix = PL_savestack_ix;
468	c->savestack_max = PL_savestack_max;
469	c->retstack = PL_retstack;
470	c->retstack_ix = PL_retstack_ix;
471	c->retstack_max = PL_retstack_max;
472	c->curcop = PL_curcop;
473	c->top_env = PL_top_env;
474	}	548	}
475		549
476	/*	550	/*
477	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
478	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
479	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
480	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
481	*/	555	*/
482	STATIC void	556	#if CORO_PREFER_PERL_FUNCTIONS
		557	# define coro_init_stacks init_stacks
		558	#else
		559	static void
483	coro_init_stacks (pTHX)	560	coro_init_stacks (pTHX)
484	{	561	{
485	LOCK;	562	PL_curstackinfo = new_stackinfo(32, 8);
486
487	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
488	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
489	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
490	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491		566
492	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
493	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
494	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
495		570
496	New(50,PL_tmps_stack,96,SV*);	571	New(50,PL_tmps_stack,32,SV*);
497	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
498	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
499	PL_tmps_max = 96;	574	PL_tmps_max = 32;
500		575
501	New(54,PL_markstack,16,I32);	576	New(54,PL_markstack,16,I32);
502	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
503	PL_markstack_max = PL_markstack + 16;	578	PL_markstack_max = PL_markstack + 16;
504		579
505	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
506	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
507	#endif	582	#endif
508		583
509	New(54,PL_scopestack,16,I32);	584	New(54,PL_scopestack,8,I32);
510	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
511	PL_scopestack_max = 16;	586	PL_scopestack_max = 8;
512		587
513	New(54,PL_savestack,96,ANY);	588	New(54,PL_savestack,24,ANY);
514	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
515	PL_savestack_max = 96;	590	PL_savestack_max = 24;
516		591
		592	#if !PERL_VERSION_ATLEAST (5,9,0)
517	New(54,PL_retstack,8,OP*);	593	New(54,PL_retstack,4,OP*);
518	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
519	PL_retstack_max = 8;	595	PL_retstack_max = 4;
520		596	#endif
521	UNLOCK;
522	}	597	}
		598	#endif
523		599
524	/*	600	/*
525	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
526	*/	602	*/
527	STATIC void	603	static void
528	destroy_stacks(pTHX)	604	coro_destroy_stacks (pTHX)
529	{	605	{
530	if (!IN_DESTRUCT)
531	{
532	/* is this ugly, I ask? */
533	LEAVE_SCOPE (0);
534
535	/* sure it is, but more important: is it correct?? :/ */
536	FREETMPS;
537
538	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
539	}
540
541	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
542	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
543		608
544	while (PL_curstackinfo)	609	while (PL_curstackinfo)
545	{	610	{
546	PERL_SI *p = PL_curstackinfo->si_prev;	611	PERL_SI *p = PL_curstackinfo->si_prev;
547		612
548	{ /*D*//*remove*/
549	dSP;
550	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
551	PUTBACK; /* possibly superfluous */
552	}
553
554	if (!IN_DESTRUCT)	613	if (!IN_DESTRUCT)
555	{
556	dounwind (-1);/*D*//*remove*/
557	SvREFCNT_dec (PL_curstackinfo->si_stack);	614	SvREFCNT_dec (PL_curstackinfo->si_stack);
558	}
559		615
560	Safefree (PL_curstackinfo->si_cxstack);	616	Safefree (PL_curstackinfo->si_cxstack);
561	Safefree (PL_curstackinfo);	617	Safefree (PL_curstackinfo);
562	PL_curstackinfo = p;	618	PL_curstackinfo = p;
563	}	619	}
564		620
565	Safefree (PL_tmps_stack);	621	Safefree (PL_tmps_stack);
566	Safefree (PL_markstack);	622	Safefree (PL_markstack);
567	Safefree (PL_scopestack);	623	Safefree (PL_scopestack);
568	Safefree (PL_savestack);	624	Safefree (PL_savestack);
		625	#if !PERL_VERSION_ATLEAST (5,9,0)
569	Safefree (PL_retstack);	626	Safefree (PL_retstack);
570	}
571
572	static void
573	allocate_stack (Coro__State ctx, int alloc)
574	{
575	coro_stack *stack;
576
577	New (0, stack, 1, coro_stack);
578
579	stack->refcnt = 1;
580	stack->usecnt = 1;
581	stack->gencnt = ctx->gencnt = 0;
582
583	if (alloc)
584	{
585	#if HAVE_MMAP
586	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
587	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588	if (stack->sptr == (void *)-1)
589	#endif	627	#endif
		628	}
		629
		630	static size_t
		631	coro_rss (pTHX_ struct coro *coro)
		632	{
		633	size_t rss = sizeof (*coro);
		634
		635	if (coro->mainstack)
		636	{
		637	perl_slots tmp_slot;
		638	perl_slots *slot;
		639
		640	if (coro->flags & CF_RUNNING)
590	{	641	{
591	/*FIXME*//*D*//* reasonable stack size! */	642	slot = &tmp_slot;
592	stack->ssize = - (8192 * sizeof (long));	643
593	New (0, stack->sptr, 8192, long);	644	#define VAR(name,type) slot->name = PL_ ## name;
		645	# include "state.h"
		646	#undef VAR
594	}	647	}
595	}
596	else
597	stack->sptr = 0;
598
599	ctx->stack = stack;
600	}
601
602	static void
603	deallocate_stack (Coro__State ctx)
604	{
605	coro_stack *stack = ctx->stack;
606
607	ctx->stack = 0;
608
609	if (stack)
610	{
611	if (!--stack->refcnt)
612	{
613	#ifdef HAVE_MMAP
614	if (stack->ssize > 0 && stack->sptr)
615	munmap (stack->sptr, stack->ssize);
616	else	648	else
617	#endif	649	slot = coro->slot;
618	Safefree (stack->sptr);
619		650
620	Safefree (stack);	651	rss += sizeof (slot->curstackinfo);
621	}	652	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
622	else if (ctx->gencnt == stack->gencnt)	653	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
623	--stack->usecnt;	654	rss += slot->tmps_max * sizeof (SV *);
		655	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		656	rss += slot->scopestack_max * sizeof (I32);
		657	rss += slot->savestack_max * sizeof (ANY);
		658
		659	#if !PERL_VERSION_ATLEAST (5,9,0)
		660	rss += slot->retstack_max * sizeof (OP *);
		661	#endif
		662	}
		663
		664	return rss;
		665	}
		666
		667	/** coroutine stack handling ************************************************/
		668
		669	#if 0
		670	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		671
		672	/*
		673	* This overrides the default magic get method of %SIG elements.
		674	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		675	* and instead of tryign to save and restore the hash elements, we just provide
		676	* readback here.
		677	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		678	* not expecting this to actually change the hook. This is a potential problem
		679	* when a schedule happens then, but we ignore this.
		680	*/
		681	static int
		682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	return orig_sigelem_get (aTHX_ sv, mg);
		685	const char *s = MgPV_nolen_const (mg);
		686
		687	if (*s == '_')
624	}	688	{
625	}	689	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		690	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		691	}
626		692
		693	return orig_sigelem_get (aTHX_ sv, mg);
		694	}
		695	#endif
		696
627	static void	697	static void
628	setup_coro (void *arg)	698	coro_setup (pTHX_ struct coro *coro)
629	{	699	{
630	/*	700	/*
631	* emulate part of the perl startup here.	701	* emulate part of the perl startup here.
632	*/	702	*/
633	dTHX;
634	dSP;
635	Coro__State ctx = (Coro__State)arg;
636	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
637
638	coro_init_stacks (aTHX);	703	coro_init_stacks (aTHX);
639	/*PL_curcop = 0;*/	704
640	/*PL_in_eval = PL_in_eval;*/ /* inherit */	705	PL_runops = RUNOPS_DEFAULT;
		706	PL_curcop = &PL_compiling;
		707	PL_in_eval = EVAL_NULL;
		708	PL_comppad = 0;
		709	PL_curpm = 0;
		710	PL_curpad = 0;
		711	PL_localizing = 0;
		712	PL_dirty = 0;
		713	PL_restartop = 0;
		714
		715	/* recreate the die/warn hooks */
		716	PL_diehook = 0;
		717	hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
		718	PL_diehook = SvREFCNT_inc (rv_diehook);
		719
		720	PL_warnhook = 0;
		721	hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
		722	PL_warnhook = SvREFCNT_inc (rv_warnhook);
		723
		724	GvSV (PL_defgv) = newSV (0);
		725	GvAV (PL_defgv) = coro->args; coro->args = 0;
		726	GvSV (PL_errgv) = newSV (0);
		727	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		728	PL_rs = newSVsv (GvSV (irsgv));
		729	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		730
		731	{
		732	dSP;
		733	LOGOP myop;
		734
		735	Zero (&myop, 1, LOGOP);
		736	myop.op_next = Nullop;
		737	myop.op_flags = OPf_WANT_VOID;
		738
		739	PUSHMARK (SP);
		740	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		741	PUTBACK;
		742	PL_op = (OP *)&myop;
		743	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		744	SPAGAIN;
		745	}
		746
		747	/* this newly created coroutine might be run on an existing cctx which most
		748	* likely was suspended in set_stacklevel, called from entersub.
		749	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		750	* so we ENTER here for symmetry
		751	*/
		752	ENTER;
		753	}
		754
		755	static void
		756	coro_destroy (pTHX_ struct coro *coro)
		757	{
		758	if (!IN_DESTRUCT)
		759	{
		760	/* restore all saved variables and stuff */
		761	LEAVE_SCOPE (0);
		762	assert (PL_tmps_floor == -1);
		763
		764	/* free all temporaries */
		765	FREETMPS;
		766	assert (PL_tmps_ix == -1);
		767
		768	/* unwind all extra stacks */
		769	POPSTACK_TO (PL_mainstack);
		770
		771	/* unwind main stack */
		772	dounwind (-1);
		773	}
		774
		775	SvREFCNT_dec (GvSV (PL_defgv));
641	SvREFCNT_dec (GvAV (PL_defgv));	776	SvREFCNT_dec (GvAV (PL_defgv));
642	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	777	SvREFCNT_dec (GvSV (PL_errgv));
		778	SvREFCNT_dec (PL_defoutgv);
		779	SvREFCNT_dec (PL_rs);
		780	SvREFCNT_dec (GvSV (irsgv));
643		781
644	SPAGAIN;	782	SvREFCNT_dec (PL_diehook);
		783	SvREFCNT_dec (PL_warnhook);
		784
		785	SvREFCNT_dec (coro->saved_deffh);
		786	SvREFCNT_dec (coro->throw);
645		787
646	if (ctx->stack)	788	coro_destroy_stacks (aTHX);
647	{	789	}
648	ctx->cursp = 0;
649		790
650	PUSHMARK(SP);	791	static void
651	PUTBACK;	792	free_coro_mortal (pTHX)
652	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	793	{
653		794	if (expect_true (coro_mortal))
654	if (SvTRUE (ERRSV))
655	croak (NULL);
656	else
657	croak ("FATAL: CCTXT coroutine returned!");
658	}	795	{
659	else	796	SvREFCNT_dec (coro_mortal);
		797	coro_mortal = 0;
660	{	798	}
661	UNOP myop;	799	}
662		800
663	PL_op = (OP *)&myop;	801	static int
		802	runops_trace (pTHX)
		803	{
		804	COP *oldcop = 0;
		805	int oldcxix = -2;
		806	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		807	coro_cctx *cctx = coro->cctx;
664		808
665	Zero(&myop, 1, UNOP);	809	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
666	myop.op_next = Nullop;
667	myop.op_flags = OPf_WANT_VOID;
668
669	PUSHMARK(SP);
670	XPUSHs (sub_init);
671	/*
672	* the next line is slightly wrong, as PL_op->op_next
673	* is actually being executed so we skip the first op.
674	* that doesn't matter, though, since it is only
675	* pp_nextstate and we never return...
676	* ah yes, and I don't care anyways ;)
677	*/
678	PUTBACK;
679	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
680	SPAGAIN;
681
682	ENTER; /* necessary e.g. for dounwind */
683	}	810	{
684	}	811	PERL_ASYNC_CHECK ();
685		812
686	static void	813	if (cctx->flags & CC_TRACE_ALL)
687	continue_coro (void *arg)
688	{
689	/*
690	* this is a _very_ stripped down perl interpreter ;)
691	*/
692	dTHX;
693	Coro__State ctx = (Coro__State)arg;
694	JMPENV coro_start_env;
695
696	PL_top_env = &ctx->start_env;
697
698	ctx->cursp = 0;
699	PL_op = PL_op->op_next;
700	CALLRUNOPS(aTHX);
701
702	abort ();
703	}
704
705	STATIC void
706	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
707	{
708	dSTACKLEVEL;
709
710	if (prev != next)
711	{
712	if (next->mainstack)
713	{	814	{
714	LOCK;	815	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
715	SAVE (prev, flags);
716	LOAD (next);
717	UNLOCK;
718
719	/* mark this state as in-use */
720	next->mainstack = 0;
721	next->tmps_ix = -2;
722
723	/* stacklevel changed? if yes, grab the stack for us! */
724	if (flags & TRANSFER_SAVE_CCTXT)
725	{	816	{
726	if (!prev->stack)	817	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
727	allocate_stack (prev, 0);	818	SV **bot, **top;
728	else if (prev->cursp != stacklevel	819	AV *av = newAV (); /* return values */
729	&& prev->stack->usecnt > 1)	820	SV **cb;
		821	dSP;
		822
		823	GV *gv = CvGV (cx->blk_sub.cv);
		824	SV *fullname = sv_2mortal (newSV (0));
		825	if (isGV (gv))
		826	gv_efullname3 (fullname, gv, 0);
		827
		828	bot = PL_stack_base + cx->blk_oldsp + 1;
		829	top = cx->blk_gimme == G_ARRAY ? SP + 1
		830	: cx->blk_gimme == G_SCALAR ? bot + 1
		831	: bot;
		832
		833	av_extend (av, top - bot);
		834	while (bot < top)
		835	av_push (av, SvREFCNT_inc (*bot++));
		836
		837	PL_runops = RUNOPS_DEFAULT;
		838	ENTER;
		839	SAVETMPS;
		840	EXTEND (SP, 3);
		841	PUSHMARK (SP);
		842	PUSHs (&PL_sv_no);
		843	PUSHs (fullname);
		844	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		845	PUTBACK;
		846	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		847	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		848	SPAGAIN;
		849	FREETMPS;
		850	LEAVE;
		851	PL_runops = runops_trace;
		852	}
		853
		854	if (oldcop != PL_curcop)
		855	{
		856	oldcop = PL_curcop;
		857
		858	if (PL_curcop != &PL_compiling)
730	{	859	{
731	prev->gencnt = ++prev->stack->gencnt;	860	SV **cb;
732	prev->stack->usecnt = 1;
733	}
734		861
735	/* has our stack been invalidated? */	862	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
736	if (next->stack && next->stack->gencnt != next->gencnt)
737	{	863	{
738	deallocate_stack (next);	864	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
739	allocate_stack (next, 1);	865
740	coro_create (&(next->stack->cctx),	866	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
741	continue_coro, (void *)next,	867	{
742	next->stack->sptr, labs (next->stack->ssize));	868	runops_proc_t old_runops = PL_runops;
		869	dSP;
		870	GV *gv = CvGV (cx->blk_sub.cv);
		871	SV *fullname = sv_2mortal (newSV (0));
		872
		873	if (isGV (gv))
		874	gv_efullname3 (fullname, gv, 0);
		875
		876	PL_runops = RUNOPS_DEFAULT;
		877	ENTER;
		878	SAVETMPS;
		879	EXTEND (SP, 3);
		880	PUSHMARK (SP);
		881	PUSHs (&PL_sv_yes);
		882	PUSHs (fullname);
		883	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		884	PUTBACK;
		885	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		886	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		887	SPAGAIN;
		888	FREETMPS;
		889	LEAVE;
		890	PL_runops = runops_trace;
		891	}
		892
		893	oldcxix = cxstack_ix;
743	}	894	}
744		895
745	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	896	if (cctx->flags & CC_TRACE_LINE)
746	prev->cursp = stacklevel;
747	/* don't add any code here */
748	}
749	else
750	next->cursp = stacklevel;
751	}
752	else if (next->tmps_ix == -2)
753	croak ("tried to transfer to running coroutine");
754	else
755	{
756	LOCK;
757	SAVE (prev, -1); /* first get rid of the old state */
758	UNLOCK;
759
760	if (flags & TRANSFER_SAVE_CCTXT)
761	{
762	if (!prev->stack)
763	allocate_stack (prev, 0);
764
765	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
766	{	897	{
767	PL_top_env = &next->start_env;	898	dSP;
768		899
769	setup_coro (next);	900	PL_runops = RUNOPS_DEFAULT;
770	next->cursp = stacklevel;	901	ENTER;
771		902	SAVETMPS;
772	prev->stack->refcnt++;	903	EXTEND (SP, 3);
773	prev->stack->usecnt++;	904	PL_runops = RUNOPS_DEFAULT;
774	next->stack = prev->stack;	905	PUSHMARK (SP);
775	next->gencnt = prev->gencnt;	906	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		907	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		908	PUTBACK;
		909	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		910	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		911	SPAGAIN;
		912	FREETMPS;
		913	LEAVE;
		914	PL_runops = runops_trace;
776	}	915	}
777	else
778	{
779	assert (!next->stack);
780	allocate_stack (next, 1);
781	coro_create (&(next->stack->cctx),
782	setup_coro, (void *)next,
783	next->stack->sptr, labs (next->stack->ssize));
784	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
785	prev->cursp = stacklevel;
786	/* don't add any code here */
787	}	916	}
788	}	917	}
		918	}
		919	}
		920
		921	TAINT_NOT;
		922	return 0;
		923	}
		924
		925	/* inject a fake call to Coro::State::_cctx_init into the execution */
		926	/* _cctx_init should be careful, as it could be called at almost any time */
		927	/* during execution of a perl program */
		928	static void NOINLINE
		929	cctx_prepare (pTHX_ coro_cctx *cctx)
		930	{
		931	dSP;
		932	LOGOP myop;
		933
		934	PL_top_env = &PL_start_env;
		935
		936	if (cctx->flags & CC_TRACE)
		937	PL_runops = runops_trace;
		938
		939	Zero (&myop, 1, LOGOP);
		940	myop.op_next = PL_op;
		941	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		942
		943	PUSHMARK (SP);
		944	EXTEND (SP, 2);
		945	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		946	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		947	PUTBACK;
		948	PL_op = (OP *)&myop;
		949	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		950	SPAGAIN;
		951	}
		952
		953	/*
		954	* this is a _very_ stripped down perl interpreter ;)
		955	*/
		956	static void
		957	cctx_run (void *arg)
		958	{
		959	dTHX;
		960
		961	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		962	UNLOCK;
		963
		964	/* we now skip the entersub that lead to transfer() */
		965	PL_op = PL_op->op_next;
		966
		967	/* inject a fake subroutine call to cctx_init */
		968	cctx_prepare (aTHX_ (coro_cctx *)arg);
		969
		970	/* somebody or something will hit me for both perl_run and PL_restartop */
		971	PL_restartop = PL_op;
		972	perl_run (PL_curinterp);
		973
		974	/*
		975	* If perl-run returns we assume exit() was being called or the coro
		976	* fell off the end, which seems to be the only valid (non-bug)
		977	* reason for perl_run to return. We try to exit by jumping to the
		978	* bootstrap-time "top" top_env, as we cannot restore the "main"
		979	* coroutine as Coro has no such concept
		980	*/
		981	PL_top_env = main_top_env;
		982	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		983	}
		984
		985	static coro_cctx *
		986	cctx_new ()
		987	{
		988	coro_cctx *cctx;
		989	void *stack_start;
		990	size_t stack_size;
		991
		992	++cctx_count;
		993
		994	Newz (0, cctx, 1, coro_cctx);
		995
		996	#if HAVE_MMAP
		997	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		998	/* mmap supposedly does allocate-on-write for us */
		999	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1000
		1001	if (cctx->sptr != (void *)-1)
		1002	{
		1003	# if CORO_STACKGUARD
		1004	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1005	# endif
		1006	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1007	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1008	cctx->flags |= CC_MAPPED;
		1009	}
		1010	else
		1011	#endif
		1012	{
		1013	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1014	New (0, cctx->sptr, coro_stacksize, long);
		1015
		1016	if (!cctx->sptr)
		1017	{
		1018	perror ("FATAL: unable to allocate stack for coroutine");
		1019	_exit (EXIT_FAILURE);
		1020	}
		1021
		1022	stack_start = cctx->sptr;
		1023	stack_size = cctx->ssize;
		1024	}
		1025
		1026	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1027	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1028
		1029	return cctx;
		1030	}
		1031
		1032	static void
		1033	cctx_destroy (coro_cctx *cctx)
		1034	{
		1035	if (!cctx)
		1036	return;
		1037
		1038	--cctx_count;
		1039
		1040	#if CORO_USE_VALGRIND
		1041	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1042	#endif
		1043
		1044	#if HAVE_MMAP
		1045	if (cctx->flags & CC_MAPPED)
		1046	munmap (cctx->sptr, cctx->ssize);
		1047	else
		1048	#endif
		1049	Safefree (cctx->sptr);
		1050
		1051	Safefree (cctx);
		1052	}
		1053
		1054	/* wether this cctx should be destructed */
		1055	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1056
		1057	static coro_cctx *
		1058	cctx_get (pTHX)
		1059	{
		1060	while (expect_true (cctx_first))
		1061	{
		1062	coro_cctx *cctx = cctx_first;
		1063	cctx_first = cctx->next;
		1064	--cctx_idle;
		1065
		1066	if (expect_true (!CCTX_EXPIRED (cctx)))
		1067	return cctx;
		1068
		1069	cctx_destroy (cctx);
		1070	}
		1071
		1072	return cctx_new ();
		1073	}
		1074
		1075	static void
		1076	cctx_put (coro_cctx *cctx)
		1077	{
		1078	/* free another cctx if overlimit */
		1079	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1080	{
		1081	coro_cctx *first = cctx_first;
		1082	cctx_first = first->next;
		1083	--cctx_idle;
		1084
		1085	cctx_destroy (first);
		1086	}
		1087
		1088	++cctx_idle;
		1089	cctx->next = cctx_first;
		1090	cctx_first = cctx;
		1091	}
		1092
		1093	/** coroutine switching *****************************************************/
		1094
		1095	static void
		1096	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1097	{
		1098	if (expect_true (prev != next))
		1099	{
		1100	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1101	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1102
		1103	if (expect_false (next->flags & CF_RUNNING))
		1104	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1105
		1106	if (expect_false (next->flags & CF_DESTROYED))
		1107	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1108
		1109	if (
		1110	#if PERL_VERSION_ATLEAST (5,9,0)
		1111	expect_false (PL_parser)
		1112	#else
		1113	expect_false (PL_lex_state != LEX_NOTPARSING)
		1114	#endif
		1115	)
		1116	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1117	}
		1118	}
		1119
		1120	/* always use the TRANSFER macro */
		1121	static void NOINLINE
		1122	transfer (pTHX_ struct coro *prev, struct coro *next)
		1123	{
		1124	dSTACKLEVEL;
		1125	static volatile int has_throw;
		1126
		1127	/* sometimes transfer is only called to set idle_sp */
		1128	if (expect_false (!next))
		1129	{
		1130	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1131	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1132	}
		1133	else if (expect_true (prev != next))
		1134	{
		1135	coro_cctx *prev__cctx;
		1136
		1137	if (expect_false (prev->flags & CF_NEW))
		1138	{
		1139	/* create a new empty context */
		1140	Newz (0, prev->cctx, 1, coro_cctx);
		1141	prev->flags &= ~CF_NEW;
		1142	prev->flags |= CF_RUNNING;
		1143	}
		1144
		1145	prev->flags &= ~CF_RUNNING;
		1146	next->flags |= CF_RUNNING;
		1147
		1148	LOCK;
		1149
		1150	/* first get rid of the old state */
		1151	save_perl (aTHX_ prev);
		1152
		1153	if (expect_false (next->flags & CF_NEW))
		1154	{
		1155	/* need to start coroutine */
		1156	next->flags &= ~CF_NEW;
		1157	/* setup coroutine call */
		1158	coro_setup (aTHX_ next);
		1159	}
789	else	1160	else
		1161	load_perl (aTHX_ next);
		1162
		1163	prev__cctx = prev->cctx;
		1164
		1165	/* possibly "free" the cctx */
		1166	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1167	{
		1168	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1169	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1170
		1171	prev->cctx = 0;
		1172
		1173	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1174	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1175	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1176	if (!next->cctx)
		1177	next->cctx = cctx_get (aTHX);
		1178
		1179	cctx_put (prev__cctx);
		1180	}
		1181
		1182	++next->usecount;
		1183
		1184	if (expect_true (!next->cctx))
		1185	next->cctx = cctx_get (aTHX);
		1186
		1187	has_throw = !!next->throw;
		1188
		1189	if (expect_false (prev__cctx != next->cctx))
		1190	{
		1191	prev__cctx->top_env = PL_top_env;
		1192	PL_top_env = next->cctx->top_env;
		1193	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1194	}
		1195
		1196	free_coro_mortal (aTHX);
		1197	UNLOCK;
		1198
		1199	if (expect_false (has_throw))
		1200	{
		1201	struct coro *coro = SvSTATE (coro_current);
		1202
		1203	if (coro->throw)
790	{	1204	{
		1205	SV *exception = coro->throw;
		1206	coro->throw = 0;
		1207	sv_setsv (ERRSV, exception);
791	setup_coro (next);	1208	croak (0);
792	next->cursp = stacklevel;
793	}	1209	}
794	}	1210	}
795	}	1211	}
		1212	}
		1213
		1214	struct transfer_args
		1215	{
		1216	struct coro *prev, *next;
		1217	};
		1218
		1219	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1220	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1221
		1222	/** high level stuff ********************************************************/
		1223
		1224	static int
		1225	coro_state_destroy (pTHX_ struct coro *coro)
		1226	{
		1227	if (coro->flags & CF_DESTROYED)
		1228	return 0;
		1229
		1230	coro->flags |= CF_DESTROYED;
		1231
		1232	if (coro->flags & CF_READY)
		1233	{
		1234	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1235	/* alternative: look through all ready queues and remove the coro */
		1236	LOCK;
		1237	--coro_nready;
		1238	UNLOCK;
		1239	}
		1240	else
		1241	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1242
		1243	if (coro->mainstack && coro->mainstack != main_mainstack)
		1244	{
		1245	struct coro temp;
		1246
		1247	if (coro->flags & CF_RUNNING)
		1248	croak ("FATAL: tried to destroy currently running coroutine");
		1249
		1250	save_perl (aTHX_ &temp);
		1251	load_perl (aTHX_ coro);
		1252
		1253	coro_destroy (aTHX_ coro);
		1254
		1255	load_perl (aTHX_ &temp);
		1256
		1257	coro->slot = 0;
		1258	}
		1259
		1260	cctx_destroy (coro->cctx);
		1261	SvREFCNT_dec (coro->args);
		1262
		1263	if (coro->next) coro->next->prev = coro->prev;
		1264	if (coro->prev) coro->prev->next = coro->next;
		1265	if (coro == coro_first) coro_first = coro->next;
		1266
		1267	return 1;
		1268	}
		1269
		1270	static int
		1271	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1272	{
		1273	struct coro *coro = (struct coro *)mg->mg_ptr;
		1274	mg->mg_ptr = 0;
		1275
		1276	coro->hv = 0;
		1277
		1278	if (--coro->refcnt < 0)
		1279	{
		1280	coro_state_destroy (aTHX_ coro);
		1281	Safefree (coro);
		1282	}
		1283
		1284	return 0;
		1285	}
		1286
		1287	static int
		1288	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1289	{
		1290	struct coro *coro = (struct coro *)mg->mg_ptr;
		1291
		1292	++coro->refcnt;
		1293
		1294	return 0;
		1295	}
		1296
		1297	static MGVTBL coro_state_vtbl = {
		1298	0, 0, 0, 0,
		1299	coro_state_free,
		1300	0,
		1301	#ifdef MGf_DUP
		1302	coro_state_dup,
		1303	#else
		1304	# define MGf_DUP 0
		1305	#endif
		1306	};
		1307
		1308	static void
		1309	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1310	{
		1311	ta->prev = SvSTATE (prev_sv);
		1312	ta->next = SvSTATE (next_sv);
		1313	TRANSFER_CHECK (*ta);
		1314	}
		1315
		1316	static void
		1317	api_transfer (SV *prev_sv, SV *next_sv)
		1318	{
		1319	dTHX;
		1320	struct transfer_args ta;
		1321
		1322	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1323	TRANSFER (ta);
		1324	}
		1325
		1326	/** Coro ********************************************************************/
		1327
		1328	static void
		1329	coro_enq (pTHX_ SV *coro_sv)
		1330	{
		1331	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1332	}
		1333
		1334	static SV *
		1335	coro_deq (pTHX)
		1336	{
		1337	int prio;
		1338
		1339	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1340	if (AvFILLp (coro_ready [prio]) >= 0)
		1341	return av_shift (coro_ready [prio]);
		1342
		1343	return 0;
		1344	}
		1345
		1346	static int
		1347	api_ready (SV *coro_sv)
		1348	{
		1349	dTHX;
		1350	struct coro *coro;
		1351
		1352	if (SvROK (coro_sv))
		1353	coro_sv = SvRV (coro_sv);
		1354
		1355	coro = SvSTATE (coro_sv);
		1356
		1357	if (coro->flags & CF_READY)
		1358	return 0;
		1359
		1360	coro->flags |= CF_READY;
796		1361
797	LOCK;	1362	LOCK;
798	if (coro_mortal)	1363	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
799	{	1364	++coro_nready;
800	SvREFCNT_dec (coro_mortal);
801	coro_mortal = 0;
802	}
803	UNLOCK;	1365	UNLOCK;
804	}
805		1366
806	#define SV_CORO(sv,func) \
807	do { \
808	if (SvROK (sv)) \
809	sv = SvRV (sv); \
810	\
811	if (SvTYPE (sv) == SVt_PVHV) \
812	{ \
813	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
814	\
815	if (!he) \
816	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
817	\
818	(sv) = SvRV (HeVAL(he)); \
819	} \
820	\
821	/* must also be changed inside Coro::Cont::yield */ \
822	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
823	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
824	\
825	} while(0)
826
827	#define SvSTATE(sv) (struct coro *)SvIV (sv)
828
829	static void
830	api_transfer(pTHX_ SV *prev, SV *next, int flags)
831	{
832	SV_CORO (prev, "Coro::transfer");
833	SV_CORO (next, "Coro::transfer");
834
835	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
836	}
837
838	/** Coro ********************************************************************/
839
840	#define PRIO_MAX 3
841	#define PRIO_HIGH 1
842	#define PRIO_NORMAL 0
843	#define PRIO_LOW -1
844	#define PRIO_IDLE -3
845	#define PRIO_MIN -4
846
847	/* for Coro.pm */
848	static GV *coro_current, *coro_idle;
849	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
850	static int coro_nready;
851
852	static void
853	coro_enq (pTHX_ SV *sv)
854	{
855	if (SvTYPE (sv) == SVt_PVHV)
856	{
857	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
858	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
859
860	prio = prio > PRIO_MAX ? PRIO_MAX
861	: prio < PRIO_MIN ? PRIO_MIN
862	: prio;
863
864	av_push (coro_ready [prio - PRIO_MIN], sv);
865	coro_nready++;
866
867	return;
868	}
869
870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
871	}
872
873	static SV *
874	coro_deq (pTHX_ int min_prio)
875	{
876	int prio = PRIO_MAX - PRIO_MIN;
877
878	min_prio -= PRIO_MIN;
879	if (min_prio < 0)
880	min_prio = 0;
881
882	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
883	if (av_len (coro_ready[prio]) >= 0)
884	{
885	coro_nready--;
886	return av_shift (coro_ready[prio]);
887	}
888
889	return 0;	1367	return 1;
890	}	1368	}
891		1369
892	static void	1370	static int
893	api_ready (SV *coro)	1371	api_is_ready (SV *coro_sv)
894	{	1372	{
895	dTHX;	1373	dTHX;
		1374	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1375	}
896		1376
897	if (SvROK (coro))	1377	static void
898	coro = SvRV (coro);	1378	prepare_schedule (pTHX_ struct transfer_args *ta)
		1379	{
		1380	SV *prev_sv, *next_sv;
		1381
		1382	for (;;)
		1383	{
		1384	LOCK;
		1385	next_sv = coro_deq (aTHX);
		1386
		1387	/* nothing to schedule: call the idle handler */
		1388	if (expect_false (!next_sv))
		1389	{
		1390	dSP;
		1391	UNLOCK;
		1392
		1393	ENTER;
		1394	SAVETMPS;
		1395
		1396	PUSHMARK (SP);
		1397	PUTBACK;
		1398	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1399	SPAGAIN;
		1400
		1401	FREETMPS;
		1402	LEAVE;
		1403	continue;
		1404	}
		1405
		1406	ta->next = SvSTATE (next_sv);
		1407
		1408	/* cannot transfer to destroyed coros, skip and look for next */
		1409	if (expect_false (ta->next->flags & CF_DESTROYED))
		1410	{
		1411	UNLOCK;
		1412	SvREFCNT_dec (next_sv);
		1413	/* coro_nready is already taken care of by destroy */
		1414	continue;
		1415	}
		1416
		1417	--coro_nready;
		1418	UNLOCK;
		1419	break;
		1420	}
		1421
		1422	/* free this only after the transfer */
		1423	prev_sv = SvRV (coro_current);
		1424	ta->prev = SvSTATE (prev_sv);
		1425	TRANSFER_CHECK (*ta);
		1426	assert (ta->next->flags & CF_READY);
		1427	ta->next->flags &= ~CF_READY;
		1428	SvRV_set (coro_current, next_sv);
899		1429
900	LOCK;	1430	LOCK;
901	coro_enq (aTHX_ SvREFCNT_inc (coro));	1431	free_coro_mortal (aTHX);
		1432	coro_mortal = prev_sv;
902	UNLOCK;	1433	UNLOCK;
903	}	1434	}
904		1435
905	static void	1436	static void
		1437	prepare_cede (pTHX_ struct transfer_args *ta)
		1438	{
		1439	api_ready (coro_current);
		1440	prepare_schedule (aTHX_ ta);
		1441	}
		1442
		1443	static int
		1444	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1445	{
		1446	if (coro_nready)
		1447	{
		1448	SV *prev = SvRV (coro_current);
		1449	prepare_schedule (aTHX_ ta);
		1450	api_ready (prev);
		1451	return 1;
		1452	}
		1453	else
		1454	return 0;
		1455	}
		1456
		1457	static void
906	api_schedule (void)	1458	api_schedule (void)
907	{	1459	{
908	dTHX;	1460	dTHX;
		1461	struct transfer_args ta;
909		1462
910	SV *prev, *next;	1463	prepare_schedule (aTHX_ &ta);
911		1464	TRANSFER (ta);
912	LOCK;
913
914	prev = SvRV (GvSV (coro_current));
915	next = coro_deq (aTHX_ PRIO_MIN);
916
917	if (!next)
918	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
919
920	/* free this only after the transfer */
921	coro_mortal = prev;
922	SV_CORO (prev, "Coro::schedule");
923
924	SvRV (GvSV (coro_current)) = next;
925
926	SV_CORO (next, "Coro::schedule");
927
928	UNLOCK;
929
930	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
931	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
932	}	1465	}
933		1466
934	static void	1467	static int
935	api_cede (void)	1468	api_cede (void)
936	{	1469	{
937	dTHX;	1470	dTHX;
		1471	struct transfer_args ta;
938		1472
939	LOCK;	1473	prepare_cede (aTHX_ &ta);
940	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
941	UNLOCK;
942		1474
943	api_schedule ();	1475	if (expect_true (ta.prev != ta.next))
		1476	{
		1477	TRANSFER (ta);
		1478	return 1;
		1479	}
		1480	else
		1481	return 0;
944	}	1482	}
945		1483
		1484	static int
		1485	api_cede_notself (void)
		1486	{
		1487	dTHX;
		1488	struct transfer_args ta;
		1489
		1490	if (prepare_cede_notself (aTHX_ &ta))
		1491	{
		1492	TRANSFER (ta);
		1493	return 1;
		1494	}
		1495	else
		1496	return 0;
		1497	}
		1498
		1499	static void
		1500	api_trace (SV *coro_sv, int flags)
		1501	{
		1502	dTHX;
		1503	struct coro *coro = SvSTATE (coro_sv);
		1504
		1505	if (flags & CC_TRACE)
		1506	{
		1507	if (!coro->cctx)
		1508	coro->cctx = cctx_new ();
		1509	else if (!(coro->cctx->flags & CC_TRACE))
		1510	croak ("cannot enable tracing on coroutine with custom stack");
		1511
		1512	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1513	}
		1514	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1515	{
		1516	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1517
		1518	if (coro->flags & CF_RUNNING)
		1519	PL_runops = RUNOPS_DEFAULT;
		1520	else
		1521	coro->slot->runops = RUNOPS_DEFAULT;
		1522	}
		1523	}
		1524
946	MODULE = Coro::State PACKAGE = Coro::State	1525	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
947		1526
948	PROTOTYPES: ENABLE	1527	PROTOTYPES: DISABLE
949		1528
950	BOOT:	1529	BOOT:
951	{ /* {} necessary for stoopid perl-5.6.x */	1530	{
952	#ifdef USE_ITHREADS	1531	#ifdef USE_ITHREADS
953	MUTEX_INIT (&coro_mutex);	1532	MUTEX_INIT (&coro_mutex);
954	#endif	1533	#endif
		1534	BOOT_PAGESIZE;
955		1535
956	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1536	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
957	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1537	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1538	#if 0
		1539	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1540	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1541	#endif
		1542	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1543	rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1544	rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1545
958	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1546	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959		1547
960	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1548	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
961	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1549	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
962	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1550	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
963	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1551	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
964		1552
965	main_mainstack = PL_mainstack;	1553	main_mainstack = PL_mainstack;
		1554	main_top_env = PL_top_env;
		1555
		1556	while (main_top_env->je_prev)
		1557	main_top_env = main_top_env->je_prev;
966		1558
967	coroapi.ver = CORO_API_VERSION;	1559	coroapi.ver = CORO_API_VERSION;
		1560	coroapi.rev = CORO_API_REVISION;
968	coroapi.transfer = api_transfer;	1561	coroapi.transfer = api_transfer;
969	}
970		1562
971	Coro::State	1563	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
972	_newprocess(args)	1564	}
973	SV * args	1565
974	PROTOTYPE: $	1566	SV *
		1567	new (char *klass, ...)
975	CODE:	1568	CODE:
976	Coro__State coro;	1569	{
		1570	struct coro *coro;
		1571	MAGIC *mg;
		1572	HV *hv;
		1573	int i;
977		1574
978	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
979	croak ("Coro::State::_newprocess expects an arrayref");
980
981	Newz (0, coro, 1, struct coro);	1575	Newz (0, coro, 1, struct coro);
		1576	coro->args = newAV ();
		1577	coro->flags = CF_NEW;
982		1578
983	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1579	if (coro_first) coro_first->prev = coro;
984	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1580	coro->next = coro_first;
985	/*coro->stack = 0;*/	1581	coro_first = coro;
986		1582
987	/* same as JMPENV_BOOTSTRAP */	1583	coro->hv = hv = newHV ();
988	/* we might be able to recycle start_env, but safe is safe */	1584	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
989	/*Zero(&coro->start_env, 1, JMPENV);*/	1585	mg->mg_flags |= MGf_DUP;
990	coro->start_env.je_ret = -1;	1586	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991	coro->start_env.je_mustcatch = TRUE;
992		1587
993	RETVAL = coro;	1588	av_extend (coro->args, items - 1);
		1589	for (i = 1; i < items; i++)
		1590	av_push (coro->args, newSVsv (ST (i)));
		1591	}
994	OUTPUT:	1592	OUTPUT:
995	RETVAL	1593	RETVAL
996		1594
		1595	# these not obviously related functions are all rolled into the same xs
		1596	# function to increase chances that they all will call transfer with the same
		1597	# stack offset
997	void	1598	void
998	transfer(prev, next, flags)	1599	_set_stacklevel (...)
999	SV *prev	1600	ALIAS:
1000	SV *next	1601	Coro::State::transfer = 1
1001	int flags	1602	Coro::schedule = 2
1002	PROTOTYPE: @	1603	Coro::cede = 3
		1604	Coro::cede_notself = 4
1003	CODE:	1605	CODE:
		1606	{
		1607	struct transfer_args ta;
		1608
1004	PUTBACK;	1609	PUTBACK;
1005	SV_CORO (next, "Coro::transfer");	1610	switch (ix)
1006	SV_CORO (prev, "Coro::transfer");	1611	{
1007	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1612	case 0:
		1613	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1614	ta.next = 0;
		1615	break;
		1616
		1617	case 1:
		1618	if (items != 2)
		1619	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1620
		1621	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1622	break;
		1623
		1624	case 2:
		1625	prepare_schedule (aTHX_ &ta);
		1626	break;
		1627
		1628	case 3:
		1629	prepare_cede (aTHX_ &ta);
		1630	break;
		1631
		1632	case 4:
		1633	if (!prepare_cede_notself (aTHX_ &ta))
		1634	XSRETURN_EMPTY;
		1635
		1636	break;
		1637	}
1008	SPAGAIN;	1638	SPAGAIN;
1009		1639
		1640	BARRIER;
		1641	PUTBACK;
		1642	TRANSFER (ta);
		1643	SPAGAIN; /* might be the sp of a different coroutine now */
		1644	/* be extra careful not to ever do anything after TRANSFER */
		1645	}
		1646
		1647	bool
		1648	_destroy (SV *coro_sv)
		1649	CODE:
		1650	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1651	OUTPUT:
		1652	RETVAL
		1653
1010	void	1654	void
1011	DESTROY(coro)
1012	Coro::State coro
1013	CODE:
1014
1015	if (coro->mainstack && coro->mainstack != main_mainstack)
1016	{
1017	struct coro temp;
1018
1019	PUTBACK;
1020	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1021	LOAD(aTHX_ coro);
1022	SPAGAIN;
1023
1024	destroy_stacks (aTHX);
1025
1026	LOAD((&temp)); /* this will get rid of defsv etc.. */
1027	SPAGAIN;
1028
1029	coro->mainstack = 0;
1030	}
1031
1032	deallocate_stack (coro);
1033	SvREFCNT_dec (coro->args);
1034	Safefree (coro);
1035
1036	void
1037	_exit(code)	1655	_exit (code)
1038	int code	1656	int code
1039	PROTOTYPE: $	1657	PROTOTYPE: $
1040	CODE:	1658	CODE:
1041	_exit (code);	1659	_exit (code);
1042		1660
1043	MODULE = Coro::State PACKAGE = Coro::Cont	1661	int
		1662	cctx_stacksize (int new_stacksize = 0)
		1663	CODE:
		1664	RETVAL = coro_stacksize;
		1665	if (new_stacksize)
		1666	coro_stacksize = new_stacksize;
		1667	OUTPUT:
		1668	RETVAL
1044		1669
1045	# this is slightly dirty (should expose a c-level api)	1670	int
		1671	cctx_count ()
		1672	CODE:
		1673	RETVAL = cctx_count;
		1674	OUTPUT:
		1675	RETVAL
		1676
		1677	int
		1678	cctx_idle ()
		1679	CODE:
		1680	RETVAL = cctx_idle;
		1681	OUTPUT:
		1682	RETVAL
1046		1683
1047	void	1684	void
1048	yield(...)	1685	list ()
1049	PROTOTYPE: @	1686	PPCODE:
		1687	{
		1688	struct coro *coro;
		1689	for (coro = coro_first; coro; coro = coro->next)
		1690	if (coro->hv)
		1691	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1692	}
		1693
		1694	void
		1695	call (Coro::State coro, SV *coderef)
		1696	ALIAS:
		1697	eval = 1
		1698	CODE:
		1699	{
		1700	if (coro->mainstack)
		1701	{
		1702	struct coro temp;
		1703
		1704	if (!(coro->flags & CF_RUNNING))
		1705	{
		1706	PUTBACK;
		1707	save_perl (aTHX_ &temp);
		1708	load_perl (aTHX_ coro);
		1709	}
		1710
		1711	{
		1712	dSP;
		1713	ENTER;
		1714	SAVETMPS;
		1715	PUTBACK;
		1716	PUSHSTACK;
		1717	PUSHMARK (SP);
		1718
		1719	if (ix)
		1720	eval_sv (coderef, 0);
		1721	else
		1722	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1723
		1724	POPSTACK;
		1725	SPAGAIN;
		1726	FREETMPS;
		1727	LEAVE;
		1728	PUTBACK;
		1729	}
		1730
		1731	if (!(coro->flags & CF_RUNNING))
		1732	{
		1733	save_perl (aTHX_ coro);
		1734	load_perl (aTHX_ &temp);
		1735	SPAGAIN;
		1736	}
		1737	}
		1738	}
		1739
		1740	SV *
		1741	is_ready (Coro::State coro)
		1742	PROTOTYPE: $
		1743	ALIAS:
		1744	is_ready = CF_READY
		1745	is_running = CF_RUNNING
		1746	is_new = CF_NEW
		1747	is_destroyed = CF_DESTROYED
		1748	CODE:
		1749	RETVAL = boolSV (coro->flags & ix);
		1750	OUTPUT:
		1751	RETVAL
		1752
		1753	void
		1754	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1755
		1756	SV *
		1757	has_stack (Coro::State coro)
		1758	PROTOTYPE: $
		1759	CODE:
		1760	RETVAL = boolSV (!!coro->cctx);
		1761	OUTPUT:
		1762	RETVAL
		1763
		1764	int
		1765	is_traced (Coro::State coro)
		1766	PROTOTYPE: $
		1767	CODE:
		1768	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1769	OUTPUT:
		1770	RETVAL
		1771
		1772	IV
		1773	rss (Coro::State coro)
		1774	PROTOTYPE: $
		1775	ALIAS:
		1776	usecount = 1
1050	CODE:	1777	CODE:
1051	static SV *returnstk;	1778	switch (ix)
1052	SV *sv;	1779	{
1053	AV *defav = GvAV (PL_defgv);	1780	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1054	struct coro *prev, *next;	1781	case 1: RETVAL = coro->usecount; break;
		1782	}
		1783	OUTPUT:
		1784	RETVAL
1055		1785
1056	if (!returnstk)
1057	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1058
1059	/* set up @_ -- ugly */
1060	av_clear (defav);
1061	av_fill (defav, items - 1);
1062	while (items--)
1063	av_store (defav, items, SvREFCNT_inc (ST(items)));
1064
1065	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1066	sv = av_pop ((AV *)SvRV (returnstk));
1067	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1068	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1069	SvREFCNT_dec (sv);
1070
1071	transfer(aTHX_ prev, next, 0);
1072		1786
1073	MODULE = Coro::State PACKAGE = Coro	1787	MODULE = Coro::State PACKAGE = Coro
1074		1788
1075	# this is slightly dirty (should expose a c-level api)
1076
1077	BOOT:	1789	BOOT:
1078	{	1790	{
1079	int i;	1791	int i;
		1792
		1793	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1794	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1795	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1796
		1797	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1798	SvREADONLY_on (coro_current);
		1799
1080	HV *stash = gv_stashpv ("Coro", TRUE);	1800	coro_stash = gv_stashpv ("Coro", TRUE);
1081		1801
1082	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1802	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1803	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1804	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1805	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1806	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1807	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1088
1089	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1090	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1091		1808
1092	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1809	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1093	coro_ready[i] = newAV ();	1810	coro_ready[i] = newAV ();
1094		1811
1095	{	1812	{
1096	SV *sv = perl_get_sv("Coro::API", 1);	1813	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1814	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1097		1815
1098	coroapi.schedule = api_schedule;	1816	coroapi.schedule = api_schedule;
1099	coroapi.cede = api_cede;	1817	coroapi.cede = api_cede;
		1818	coroapi.cede_notself = api_cede_notself;
1100	coroapi.ready = api_ready;	1819	coroapi.ready = api_ready;
		1820	coroapi.is_ready = api_is_ready;
1101	coroapi.nready = &coro_nready;	1821	coroapi.nready = &coro_nready;
1102	coroapi.current = coro_current;	1822	coroapi.current = coro_current;
1103		1823
1104	GCoroAPI = &coroapi;	1824	GCoroAPI = &coroapi;
1105	sv_setiv(sv, (IV)&coroapi);	1825	sv_setiv (sv, (IV)&coroapi);
1106	SvREADONLY_on(sv);	1826	SvREADONLY_on (sv);
1107	}	1827	}
1108	}	1828	}
1109		1829
1110	#if !PERL_MICRO
1111
1112	void	1830	void
1113	ready(self)	1831	_set_current (SV *current)
1114	SV * self
1115	PROTOTYPE: $	1832	PROTOTYPE: $
1116	CODE:	1833	CODE:
1117	api_ready (self);	1834	SvREFCNT_dec (SvRV (coro_current));
1118		1835	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1119	#endif
1120		1836
1121	int	1837	int
		1838	prio (Coro::State coro, int newprio = 0)
		1839	ALIAS:
		1840	nice = 1
		1841	CODE:
		1842	{
		1843	RETVAL = coro->prio;
		1844
		1845	if (items > 1)
		1846	{
		1847	if (ix)
		1848	newprio = coro->prio - newprio;
		1849
		1850	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1851	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1852
		1853	coro->prio = newprio;
		1854	}
		1855	}
		1856	OUTPUT:
		1857	RETVAL
		1858
		1859	SV *
		1860	ready (SV *self)
		1861	PROTOTYPE: $
		1862	CODE:
		1863	RETVAL = boolSV (api_ready (self));
		1864	OUTPUT:
		1865	RETVAL
		1866
		1867	int
1122	nready(...)	1868	nready (...)
1123	PROTOTYPE:	1869	PROTOTYPE:
1124	CODE:	1870	CODE:
1125	RETVAL = coro_nready;	1871	RETVAL = coro_nready;
1126	OUTPUT:	1872	OUTPUT:
1127	RETVAL	1873	RETVAL
1128		1874
1129	void	1875	void
1130	schedule(...)	1876	throw (Coro::State self, SV *throw = &PL_sv_undef)
1131	PROTOTYPE:	1877	PROTOTYPE: $;$
		1878	CODE:
		1879	SvREFCNT_dec (self->throw);
		1880	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1881
		1882	# for async_pool speedup
		1883	void
		1884	_pool_1 (SV *cb)
1132	CODE:	1885	CODE:
1133	api_schedule ();	1886	{
		1887	struct coro *coro = SvSTATE (coro_current);
		1888	HV *hv = (HV *)SvRV (coro_current);
		1889	AV *defav = GvAV (PL_defgv);
		1890	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1891	AV *invoke_av;
		1892	int i, len;
		1893
		1894	if (!invoke)
		1895	croak ("\3async_pool terminate\2\n");
		1896
		1897	SvREFCNT_dec (coro->saved_deffh);
		1898	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1899
		1900	hv_store (hv, "desc", sizeof ("desc") - 1,
		1901	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1902
		1903	invoke_av = (AV *)SvRV (invoke);
		1904	len = av_len (invoke_av);
		1905
		1906	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1907
		1908	if (len > 0)
		1909	{
		1910	av_fill (defav, len - 1);
		1911	for (i = 0; i < len; ++i)
		1912	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1913	}
		1914
		1915	SvREFCNT_dec (invoke);
		1916	}
1134		1917
1135	void	1918	void
1136	cede(...)	1919	_pool_2 (SV *cb)
1137	PROTOTYPE:
1138	CODE:	1920	CODE:
1139	api_cede ();	1921	{
		1922	struct coro *coro = SvSTATE (coro_current);
1140		1923
		1924	sv_setsv (cb, &PL_sv_undef);
		1925
		1926	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1927	coro->saved_deffh = 0;
		1928
		1929	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1930	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1931	croak ("\3async_pool terminate\2\n");
		1932
		1933	av_clear (GvAV (PL_defgv));
		1934	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1935	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1936
		1937	coro->prio = 0;
		1938
		1939	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1940	api_trace (coro_current, 0);
		1941
		1942	av_push (av_async_pool, newSVsv (coro_current));
		1943	}
		1944
		1945
		1946	MODULE = Coro::State PACKAGE = Coro::AIO
		1947
		1948	SV *
		1949	_get_state ()
		1950	CODE:
		1951	{
		1952	struct io_state *data;
		1953
		1954	RETVAL = newSV (sizeof (struct io_state));
		1955	data = (struct io_state *)SvPVX (RETVAL);
		1956	SvCUR_set (RETVAL, sizeof (struct io_state));
		1957	SvPOK_only (RETVAL);
		1958
		1959	data->errorno = errno;
		1960	data->laststype = PL_laststype;
		1961	data->laststatval = PL_laststatval;
		1962	data->statcache = PL_statcache;
		1963	}
		1964	OUTPUT:
		1965	RETVAL
		1966
		1967	void
		1968	_set_state (char *data_)
		1969	PROTOTYPE: $
		1970	CODE:
		1971	{
		1972	struct io_state *data = (void *)data_;
		1973
		1974	errno = data->errorno;
		1975	PL_laststype = data->laststype;
		1976	PL_laststatval = data->laststatval;
		1977	PL_statcache = data->statcache;
		1978	}
		1979

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