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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.62 by root, Tue Feb 22 19:51:58 2005 UTC vs.
Revision 1.226 by root, Fri Apr 4 20:07:35 2008 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	/* 5.8.8 */
31		78	#ifndef GV_NOTQUAL
32	#include <signal.h>	79	# define GV_NOTQUAL 0
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
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
44	#endif	83	#endif
45		84
46	#define SUB_INIT "Coro::State::initialize"	85	/* 5.11 */
47	#define UCORO_STATE "_coro_state"	86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
48		89
49	/* The next macro should declare a variable stacklevel that contains and approximation	90	/* 5.8.7 */
50	* to the current C stack pointer. Its property is that it changes with each call	91	#ifndef SvRV_set
51	* and should be unique. */	92	# define SvRV_set(s,v) SvRV(s) = (v)
		93	#endif
		94
		95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		96	# undef CORO_STACKGUARD
		97	#endif
		98
		99	#ifndef CORO_STACKGUARD
		100	# define CORO_STACKGUARD 0
		101	#endif
		102
		103	/* prefer perl internal functions over our own? */
		104	#ifndef CORO_PREFER_PERL_FUNCTIONS
		105	# define CORO_PREFER_PERL_FUNCTIONS 0
		106	#endif
		107
		108	/* The next macros try to return the current stack pointer, in an as
		109	* portable way as possible. */
		110	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	111	#define STACKLEVEL ((void *)&stacklevel)
53		112
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		114
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	115	#if __GNUC__ >= 3
		116	# define attribute(x) __attribute__(x)
		117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
		119	#else
		120	# define attribute(x)
		121	# define BARRIER
		122	# define expect(expr,value) (expr)
		123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
		127
		128	#define NOINLINE attribute ((noinline))
57		129
58	#include "CoroAPI.h"	130	#include "CoroAPI.h"
59		131
60	#ifdef USE_ITHREADS	132	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	133	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	134	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	135	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	136	#else
65	# define LOCK 0	137	# define LOCK (void)0
66	# define UNLOCK 0	138	# define UNLOCK (void)0
67	#endif	139	#endif
68		140
		141	/* helper storage struct for Coro::AIO */
		142	struct io_state
		143	{
		144	int errorno;
		145	I32 laststype;
		146	int laststatval;
		147	Stat_t statcache;
		148	};
		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	152	static AV *main_mainstack; /* used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	154	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 */	155	static volatile SV *coro_mortal; /* will be freed after next transfer */
75		156
76	/* this is actually not only the c stack but also c registers etc... */	157	static GV *irsgv; /* $/ */
		158	static GV *stdoutgv; /* *STDOUT */
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV *hv_sig; /* %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
		167
		168	static struct coro_cctx *cctx_first;
		169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		178	};
		179
		180	/* this is a structure representing a c-level coroutine */
		181	typedef struct coro_cctx {
		182	struct coro_cctx *next;
		183
		184	/* the stack */
		185	void *sptr;
		186	size_t ssize;
		187
		188	/* cpu state */
		189	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		190	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		191	JMPENV *top_env;
		192	coro_context cctx;
		193
		194	#if CORO_USE_VALGRIND
		195	int valgrind_id;
		196	#endif
		197	unsigned char flags;
		198	} coro_cctx;
		199
		200	enum {
		201	CF_RUNNING = 0x0001, /* coroutine is running */
		202	CF_READY = 0x0002, /* coroutine is ready */
		203	CF_NEW = 0x0004, /* has never been switched to */
		204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		205	};
		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
77	typedef struct {	208	typedef struct {
78	int refcnt; /* pointer reference counter */	209	SV *defsv;
79	int usecnt; /* shared by how many coroutines */	210	AV *defav;
80	int gencnt; /* generation counter */	211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
81		217
82	coro_context cctx;	218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83		219
84	void *sptr;	220	/* this is a structure representing a perl-level coroutine */
85	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87
88	struct coro {	221	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	222	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	223	coro_cctx *cctx;
91		224
92	/* the optional C context */	225	/* 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;	226	AV *mainstack;
110	SV **stack_sp;	227	perl_slots *slot; /* basically the saved sp */
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	COP *curcop;
134	JMPENV *top_env;
135		228
136	/* data associated with this coroutine (initial args) */	229	AV *args; /* data associated with this coroutine (initial args) */
137	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
		231	int flags; /* CF_ flags */
		232	HV *hv; /* the perl hash associated with this coro, if any */
		233
		234	/* statistics */
		235	int usecount; /* number of transfers to this coro */
		236
		237	/* coro process data */
		238	int prio;
		239	SV *throw; /* exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
		243
		244	/* linked list */
		245	struct coro *next, *prev;
138	};	246	};
139		247
140	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
142		250
143	/* mostly copied from op.c:cv_clone2 */	251	/** Coro ********************************************************************/
144	STATIC AV *	252
145	clone_padlist (pTHX_ AV *protopadlist)	253	#define PRIO_MAX 3
		254	#define PRIO_HIGH 1
		255	#define PRIO_NORMAL 0
		256	#define PRIO_LOW -1
		257	#define PRIO_IDLE -3
		258	#define PRIO_MIN -4
		259
		260	/* for Coro.pm */
		261	static SV *coro_current;
		262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		263	static int coro_nready;
		264	static struct coro *coro_first;
		265
		266	/** lowlevel stuff **********************************************************/
		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
146	{	270	{
147	AV *av;	271	#if PERL_VERSION_ATLEAST (5,9,0)
148	I32 ix;	272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	273	get_sv (name, create);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	274	#endif
151	SV **pname = AvARRAY (protopad_name);	275	return get_sv (name, create);
152	SV **ppad = AvARRAY (protopad);	276	}
153	I32 fname = AvFILLp (protopad_name);	277
154	I32 fpad = AvFILLp (protopad);	278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,9,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,9,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
		298	static AV *
		299	coro_clone_padlist (pTHX_ CV *cv)
		300	{
		301	AV *padlist = CvPADLIST (cv);
155	AV *newpadlist, *newpad_name, *newpad;	302	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		303
166	newpadlist = newAV ();	304	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	305	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	306	#if PERL_VERSION_ATLEAST (5,9,0)
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		308	#else
		309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		310	#endif
		311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		312	--AvFILLp (padlist);
		313
		314	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	315	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		316
240	return newpadlist;	317	return newpadlist;
241	}	318	}
242		319
243	STATIC void	320	static void
244	free_padlist (pTHX_ AV *padlist)	321	free_padlist (pTHX_ AV *padlist)
245	{	322	{
246	/* may be during global destruction */	323	/* may be during global destruction */
247	if (SvREFCNT (padlist))	324	if (SvREFCNT (padlist))
248	{	325	{
…		…
262		339
263	SvREFCNT_dec ((SV*)padlist);	340	SvREFCNT_dec ((SV*)padlist);
264	}	341	}
265	}	342	}
266		343
267	STATIC int	344	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	345	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	346	{
270	AV *padlist;	347	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	348	AV *av = (AV *)mg->mg_obj;
272		349
273	/* casting is fun. */	350	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	352	free_padlist (aTHX_ padlist);
276		353
277	SvREFCNT_dec (av);	354	return 0;
278	}	355	}
279		356
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
281		359
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
		364
		365	#define CORO_MAGIC(sv,type) \
		366	SvMAGIC (sv) \
		367	? SvMAGIC (sv)->mg_type == type \
		368	? SvMAGIC (sv) \
		369	: mg_find (sv, type) \
		370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
283		400
284	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
285	STATIC void	402	static void
286	get_padlist (pTHX_ CV *cv)	403	get_padlist (pTHX_ CV *cv)
287	{	404	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
		406	AV *av;
289		407
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	else	410	else
		411	{
		412	#if CORO_PREFER_PERL_FUNCTIONS
		413	/* this is probably cleaner, but also slower? */
		414	CV *cp = Perl_cv_clone (cv);
		415	CvPADLIST (cv) = CvPADLIST (cp);
		416	CvPADLIST (cp) = 0;
		417	SvREFCNT_dec (cp);
		418	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		420	#endif
		421	}
294	}	422	}
295		423
296	STATIC void	424	static void
297	put_padlist (pTHX_ CV *cv)	425	put_padlist (pTHX_ CV *cv)
298	{	426	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
		428	AV *av;
300		429
301	if (!mg)	430	if (expect_false (!mg))
302	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();
307	}
308		432
309	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	433	av = (AV *)mg->mg_obj;
310	}
311		434
312	#define SB do {	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
313	#define SE } while (0)	436	av_extend (av, AvMAX (av) + 1);
314		437
315	#define LOAD(state) load_state(aTHX_ (state));	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	439	}
317		440
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	441	/** load & save, init *******************************************************/
319		442
320	static void	443	static void
321	load_state(pTHX_ Coro__State c)	444	load_perl (pTHX_ Coro__State c)
322	{	445	{
323	PL_dowarn = c->dowarn;	446	perl_slots *slot = c->slot;
324	PL_in_eval = c->in_eval;	447	c->slot = 0;
325		448
326	PL_curstackinfo = c->curstackinfo;
327	PL_curstack = c->curstack;
328	PL_mainstack = c->mainstack;	449	PL_mainstack = c->mainstack;
329	PL_stack_sp = c->stack_sp;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		450
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	451	GvSV (PL_defgv) = slot->defsv;
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	452	GvAV (PL_defgv) = slot->defav;
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
		456	#define VAR(name,type) PL_ ## name = slot->name;
		457	# include "state.h"
		458	#undef VAR
358		459
359	{	460	{
360	dSP;	461	dSP;
		462
361	CV *cv;	463	CV *cv;
362		464
363	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
365	{	467	{
366	AV *padlist = (AV *)POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
372	}	470	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	471	}
376		472
377	PUTBACK;	473	PUTBACK;
378	}	474	}
379	}	475	}
380		476
381	static void	477	static void
382	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
383	{	479	{
384	{	480	{
385	dSP;	481	dSP;
386	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
390	/*	486	/*
391	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
392	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
393	*/	489	*/
394		490
395	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
397	for (;;)	493	for (;;)
398	{	494	{
399	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
400	{	496	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
402		498
403	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
404	{	500	{
405	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
406	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
407	{	504	{
408	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
419		509
		510	CvDEPTH (cv) = 0;
420	get_padlist (aTHX_ cv); /* this is a monster */	511	get_padlist (aTHX_ cv);
421	}	512	}
422	}	513	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	514	}
432		515
433	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
434	break;	517	break;
435		518
436	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
437	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
438	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
439	}	522	}
440		523
441	PUTBACK;	524	PUTBACK;
442	}	525	}
443		526
444	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
446	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
447		538
448	c->dowarn = PL_dowarn;
449	c->in_eval = PL_in_eval;
450
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;	540
455	c->op = PL_op;	541	{
456	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
457	c->comppad = PL_comppad;	543
458	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
459	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
460	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
461	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
462	c->tmps_floor = PL_tmps_floor;	548
463	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
464	c->tmps_max = PL_tmps_max;	550	# include "state.h"
465	c->markstack = PL_markstack;	551	#undef VAR
466	c->markstack_ptr = PL_markstack_ptr;	552	}
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	553	}
480		554
481	/*	555	/*
482	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
486	*/	560	*/
487	STATIC void	561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
		564	static void
488	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
489	{	566	{
490	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		571
497	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		575
501	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
502	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	579	PL_tmps_max = 32;
505		580
506	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
507	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
509		584
510	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
511	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
512	#endif	587	#endif
513		588
514	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
515	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
517		592
518	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
519	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	595	PL_savestack_max = 24;
521		596
		597	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
523	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	600	PL_retstack_max = 4;
525		601	#endif
526	UNLOCK;
527	}	602	}
		603	#endif
528		604
529	/*	605	/*
530	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
531	*/	607	*/
532	STATIC void	608	static void
533	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
534	{	610	{
535	if (!IN_DESTRUCT)
536	{
537	/* is this ugly, I ask? */
538	LEAVE_SCOPE (0);
539
540	/* sure it is, but more important: is it correct?? :/ */
541	FREETMPS;
542
543	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
544	}
545
546	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
548		613
549	while (PL_curstackinfo)	614	while (PL_curstackinfo)
550	{	615	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
552		617
553	{ /*D*//*remove*/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/*D*//*remove*/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		620
565	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	623	PL_curstackinfo = p;
568	}	624	}
569		625
570	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	627	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	629	Safefree (PL_savestack);
		630	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	631	Safefree (PL_retstack);
		632	#endif
		633	}
		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
		674	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		675	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV *old = *svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
575	}	722	}
576		723
577	static void	724	static void
578	allocate_stack (Coro__State ctx, int alloc)	725	coro_setup (pTHX_ struct coro *coro)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif
595	{
596	/*FIXME*//*D*//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}
606
607	static void
608	deallocate_stack (Coro__State ctx)
609	{
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void
633	setup_coro (void *arg)
634	{	726	{
635	/*	727	/*
636	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
637	*/	729	*/
638	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642
643	coro_init_stacks (aTHX);	730	coro_init_stacks (aTHX);
644	/*PL_curcop = 0;*/	731
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */	732	PL_runops = RUNOPS_DEFAULT;
		733	PL_curcop = &PL_compiling;
		734	PL_in_eval = EVAL_NULL;
		735	PL_comppad = 0;
		736	PL_curpm = 0;
		737	PL_curpad = 0;
		738	PL_localizing = 0;
		739	PL_dirty = 0;
		740	PL_restartop = 0;
		741
		742	/* recreate the die/warn hooks */
		743	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		744	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		745
		746	GvSV (PL_defgv) = newSV (0);
		747	GvAV (PL_defgv) = coro->args; coro->args = 0;
		748	GvSV (PL_errgv) = newSV (0);
		749	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		750	PL_rs = newSVsv (GvSV (irsgv));
		751	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		752
		753	{
		754	dSP;
		755	LOGOP myop;
		756
		757	Zero (&myop, 1, LOGOP);
		758	myop.op_next = Nullop;
		759	myop.op_flags = OPf_WANT_VOID;
		760
		761	PUSHMARK (SP);
		762	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		763	PUTBACK;
		764	PL_op = (OP *)&myop;
		765	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		766	SPAGAIN;
		767	}
		768
		769	/* this newly created coroutine might be run on an existing cctx which most
		770	* likely was suspended in set_stacklevel, called from entersub.
		771	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		772	* so we ENTER here for symmetry
		773	*/
		774	ENTER;
		775	}
		776
		777	static void
		778	coro_destroy (pTHX_ struct coro *coro)
		779	{
		780	if (!IN_DESTRUCT)
		781	{
		782	/* restore all saved variables and stuff */
		783	LEAVE_SCOPE (0);
		784	assert (PL_tmps_floor == -1);
		785
		786	/* free all temporaries */
		787	FREETMPS;
		788	assert (PL_tmps_ix == -1);
		789
		790	/* unwind all extra stacks */
		791	POPSTACK_TO (PL_mainstack);
		792
		793	/* unwind main stack */
		794	dounwind (-1);
		795	}
		796
		797	SvREFCNT_dec (GvSV (PL_defgv));
646	SvREFCNT_dec (GvAV (PL_defgv));	798	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	799	SvREFCNT_dec (GvSV (PL_errgv));
		800	SvREFCNT_dec (PL_defoutgv);
		801	SvREFCNT_dec (PL_rs);
		802	SvREFCNT_dec (GvSV (irsgv));
648		803
649	SPAGAIN;	804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
650		809
651	if (ctx->stack)	810	coro_destroy_stacks (aTHX);
652	{
653	ctx->cursp = 0;
654
655	PUSHMARK(SP);
656	PUTBACK;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659	if (SvTRUE (ERRSV))
660	croak (NULL);
661	else
662	croak ("FATAL: CCTXT coroutine returned!");
663	}
664	else
665	{
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}
689	}	811	}
690		812
691	static void	813	static void
692	continue_coro (void *arg)	814	free_coro_mortal (pTHX)
693	{	815	{
694	/*	816	if (expect_true (coro_mortal))
695	* this is a _very_ stripped down perl interpreter ;)	817	{
696	*/	818	SvREFCNT_dec (coro_mortal);
697	dTHX;	819	coro_mortal = 0;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700
701	PL_top_env = &ctx->start_env;
702
703	ctx->cursp = 0;
704	PL_op = PL_op->op_next;
705	CALLRUNOPS(aTHX);
706
707	abort ();
708	}
709
710	STATIC void
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
712	{
713	dSTACKLEVEL;
714
715	if (prev != next)
716	{	820	}
717	if (next->mainstack)	821	}
		822
		823	static int
		824	runops_trace (pTHX)
		825	{
		826	COP *oldcop = 0;
		827	int oldcxix = -2;
		828	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		829	coro_cctx *cctx = coro->cctx;
		830
		831	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		832	{
		833	PERL_ASYNC_CHECK ();
		834
		835	if (cctx->flags & CC_TRACE_ALL)
718	{	836	{
719	LOCK;	837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
720	SAVE (prev, flags);
721	LOAD (next);
722	UNLOCK;
723
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{	838	{
731	if (!prev->stack)	839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
732	allocate_stack (prev, 0);	840	SV **bot, **top;
733	else if (prev->cursp != stacklevel	841	AV *av = newAV (); /* return values */
734	&& prev->stack->usecnt > 1)	842	SV **cb;
		843	dSP;
		844
		845	GV *gv = CvGV (cx->blk_sub.cv);
		846	SV *fullname = sv_2mortal (newSV (0));
		847	if (isGV (gv))
		848	gv_efullname3 (fullname, gv, 0);
		849
		850	bot = PL_stack_base + cx->blk_oldsp + 1;
		851	top = cx->blk_gimme == G_ARRAY ? SP + 1
		852	: cx->blk_gimme == G_SCALAR ? bot + 1
		853	: bot;
		854
		855	av_extend (av, top - bot);
		856	while (bot < top)
		857	av_push (av, SvREFCNT_inc (*bot++));
		858
		859	PL_runops = RUNOPS_DEFAULT;
		860	ENTER;
		861	SAVETMPS;
		862	EXTEND (SP, 3);
		863	PUSHMARK (SP);
		864	PUSHs (&PL_sv_no);
		865	PUSHs (fullname);
		866	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		867	PUTBACK;
		868	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		869	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		870	SPAGAIN;
		871	FREETMPS;
		872	LEAVE;
		873	PL_runops = runops_trace;
		874	}
		875
		876	if (oldcop != PL_curcop)
		877	{
		878	oldcop = PL_curcop;
		879
		880	if (PL_curcop != &PL_compiling)
735	{	881	{
736	prev->gencnt = ++prev->stack->gencnt;	882	SV **cb;
737	prev->stack->usecnt = 1;
738	}
739		883
740	/* has our stack been invalidated? */	884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{	885	{
743	deallocate_stack (next);	886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
744	allocate_stack (next, 1);	887
745	coro_create (&(next->stack->cctx),	888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
746	continue_coro, (void *)next,	889	{
747	next->stack->sptr, labs (next->stack->ssize));	890	runops_proc_t old_runops = PL_runops;
		891	dSP;
		892	GV *gv = CvGV (cx->blk_sub.cv);
		893	SV *fullname = sv_2mortal (newSV (0));
		894
		895	if (isGV (gv))
		896	gv_efullname3 (fullname, gv, 0);
		897
		898	PL_runops = RUNOPS_DEFAULT;
		899	ENTER;
		900	SAVETMPS;
		901	EXTEND (SP, 3);
		902	PUSHMARK (SP);
		903	PUSHs (&PL_sv_yes);
		904	PUSHs (fullname);
		905	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		906	PUTBACK;
		907	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		908	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		909	SPAGAIN;
		910	FREETMPS;
		911	LEAVE;
		912	PL_runops = runops_trace;
		913	}
		914
		915	oldcxix = cxstack_ix;
748	}	916	}
749		917
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	918	if (cctx->flags & CC_TRACE_LINE)
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}
757	else if (next->tmps_ix == -2)
758	croak ("tried to transfer to running coroutine");
759	else
760	{
761	LOCK;
762	SAVE (prev, -1); /* first get rid of the old state */
763	UNLOCK;
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{	919	{
772	PL_top_env = &next->start_env;	920	dSP;
773		921
774	setup_coro (next);	922	PL_runops = RUNOPS_DEFAULT;
775	next->cursp = stacklevel;	923	ENTER;
776		924	SAVETMPS;
777	prev->stack->refcnt++;	925	EXTEND (SP, 3);
778	prev->stack->usecnt++;	926	PL_runops = RUNOPS_DEFAULT;
779	next->stack = prev->stack;	927	PUSHMARK (SP);
780	next->gencnt = prev->gencnt;	928	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		929	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		930	PUTBACK;
		931	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		932	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		933	SPAGAIN;
		934	FREETMPS;
		935	LEAVE;
		936	PL_runops = runops_trace;
781	}	937	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}	938	}
793	}	939	}
		940	}
		941	}
		942
		943	TAINT_NOT;
		944	return 0;
		945	}
		946
		947	/* inject a fake call to Coro::State::_cctx_init into the execution */
		948	/* _cctx_init should be careful, as it could be called at almost any time */
		949	/* during execution of a perl program */
		950	static void NOINLINE
		951	cctx_prepare (pTHX_ coro_cctx *cctx)
		952	{
		953	dSP;
		954	LOGOP myop;
		955
		956	PL_top_env = &PL_start_env;
		957
		958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
		960
		961	Zero (&myop, 1, LOGOP);
		962	myop.op_next = PL_op;
		963	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		964
		965	PUSHMARK (SP);
		966	EXTEND (SP, 2);
		967	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		968	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		969	PUTBACK;
		970	PL_op = (OP *)&myop;
		971	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		972	SPAGAIN;
		973	}
		974
		975	/*
		976	* this is a _very_ stripped down perl interpreter ;)
		977	*/
		978	static void
		979	cctx_run (void *arg)
		980	{
		981	dTHX;
		982
		983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		984	UNLOCK;
		985
		986	/* we now skip the entersub that lead to transfer() */
		987	PL_op = PL_op->op_next;
		988
		989	/* inject a fake subroutine call to cctx_init */
		990	cctx_prepare (aTHX_ (coro_cctx *)arg);
		991
		992	/* somebody or something will hit me for both perl_run and PL_restartop */
		993	PL_restartop = PL_op;
		994	perl_run (PL_curinterp);
		995
		996	/*
		997	* If perl-run returns we assume exit() was being called or the coro
		998	* fell off the end, which seems to be the only valid (non-bug)
		999	* reason for perl_run to return. We try to exit by jumping to the
		1000	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1001	* coroutine as Coro has no such concept
		1002	*/
		1003	PL_top_env = main_top_env;
		1004	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1005	}
		1006
		1007	static coro_cctx *
		1008	cctx_new ()
		1009	{
		1010	coro_cctx *cctx;
		1011	void *stack_start;
		1012	size_t stack_size;
		1013
		1014	++cctx_count;
		1015
		1016	Newz (0, cctx, 1, coro_cctx);
		1017
		1018	#if HAVE_MMAP
		1019	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1020	/* mmap supposedly does allocate-on-write for us */
		1021	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1022
		1023	if (cctx->sptr != (void *)-1)
		1024	{
		1025	# if CORO_STACKGUARD
		1026	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1027	# endif
		1028	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1029	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1030	cctx->flags |= CC_MAPPED;
		1031	}
		1032	else
		1033	#endif
		1034	{
		1035	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1036	New (0, cctx->sptr, coro_stacksize, long);
		1037
		1038	if (!cctx->sptr)
		1039	{
		1040	perror ("FATAL: unable to allocate stack for coroutine");
		1041	_exit (EXIT_FAILURE);
		1042	}
		1043
		1044	stack_start = cctx->sptr;
		1045	stack_size = cctx->ssize;
		1046	}
		1047
		1048	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1049	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1050
		1051	return cctx;
		1052	}
		1053
		1054	static void
		1055	cctx_destroy (coro_cctx *cctx)
		1056	{
		1057	if (!cctx)
		1058	return;
		1059
		1060	--cctx_count;
		1061
		1062	#if CORO_USE_VALGRIND
		1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1064	#endif
		1065
		1066	#if HAVE_MMAP
		1067	if (cctx->flags & CC_MAPPED)
		1068	munmap (cctx->sptr, cctx->ssize);
		1069	else
		1070	#endif
		1071	Safefree (cctx->sptr);
		1072
		1073	Safefree (cctx);
		1074	}
		1075
		1076	/* wether this cctx should be destructed */
		1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1078
		1079	static coro_cctx *
		1080	cctx_get (pTHX)
		1081	{
		1082	while (expect_true (cctx_first))
		1083	{
		1084	coro_cctx *cctx = cctx_first;
		1085	cctx_first = cctx->next;
		1086	--cctx_idle;
		1087
		1088	if (expect_true (!CCTX_EXPIRED (cctx)))
		1089	return cctx;
		1090
		1091	cctx_destroy (cctx);
		1092	}
		1093
		1094	return cctx_new ();
		1095	}
		1096
		1097	static void
		1098	cctx_put (coro_cctx *cctx)
		1099	{
		1100	/* free another cctx if overlimit */
		1101	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1102	{
		1103	coro_cctx *first = cctx_first;
		1104	cctx_first = first->next;
		1105	--cctx_idle;
		1106
		1107	cctx_destroy (first);
		1108	}
		1109
		1110	++cctx_idle;
		1111	cctx->next = cctx_first;
		1112	cctx_first = cctx;
		1113	}
		1114
		1115	/** coroutine switching *****************************************************/
		1116
		1117	static void
		1118	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1119	{
		1120	if (expect_true (prev != next))
		1121	{
		1122	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1123	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1124
		1125	if (expect_false (next->flags & CF_RUNNING))
		1126	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1127
		1128	if (expect_false (next->flags & CF_DESTROYED))
		1129	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (
		1132	#if PERL_VERSION_ATLEAST (5,9,0)
		1133	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
		1134	#else
		1135	expect_false (PL_lex_state != LEX_NOTPARSING)
		1136	#endif
		1137	)
		1138	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1139	}
		1140	}
		1141
		1142	/* always use the TRANSFER macro */
		1143	static void NOINLINE
		1144	transfer (pTHX_ struct coro *prev, struct coro *next)
		1145	{
		1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
		1148
		1149	/* sometimes transfer is only called to set idle_sp */
		1150	if (expect_false (!next))
		1151	{
		1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1153	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1154	}
		1155	else if (expect_true (prev != next))
		1156	{
		1157	coro_cctx *prev__cctx;
		1158
		1159	if (expect_false (prev->flags & CF_NEW))
		1160	{
		1161	/* create a new empty context */
		1162	Newz (0, prev->cctx, 1, coro_cctx);
		1163	prev->flags &= ~CF_NEW;
		1164	prev->flags |= CF_RUNNING;
		1165	}
		1166
		1167	prev->flags &= ~CF_RUNNING;
		1168	next->flags |= CF_RUNNING;
		1169
		1170	LOCK;
		1171
		1172	/* first get rid of the old state */
		1173	save_perl (aTHX_ prev);
		1174
		1175	if (expect_false (next->flags & CF_NEW))
		1176	{
		1177	/* need to start coroutine */
		1178	next->flags &= ~CF_NEW;
		1179	/* setup coroutine call */
		1180	coro_setup (aTHX_ next);
		1181	}
794	else	1182	else
		1183	load_perl (aTHX_ next);
		1184
		1185	prev__cctx = prev->cctx;
		1186
		1187	/* possibly "free" the cctx */
		1188	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1189	{
		1190	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1191	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1192
		1193	prev->cctx = 0;
		1194
		1195	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1196	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1197	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1198	if (!next->cctx)
		1199	next->cctx = cctx_get (aTHX);
		1200
		1201	cctx_put (prev__cctx);
		1202	}
		1203
		1204	++next->usecount;
		1205
		1206	if (expect_true (!next->cctx))
		1207	next->cctx = cctx_get (aTHX);
		1208
		1209	has_throw = !!next->throw;
		1210
		1211	if (expect_false (prev__cctx != next->cctx))
		1212	{
		1213	prev__cctx->top_env = PL_top_env;
		1214	PL_top_env = next->cctx->top_env;
		1215	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1216	}
		1217
		1218	free_coro_mortal (aTHX);
		1219	UNLOCK;
		1220
		1221	if (expect_false (has_throw))
		1222	{
		1223	struct coro *coro = SvSTATE (coro_current);
		1224
		1225	if (coro->throw)
795	{	1226	{
		1227	SV *exception = coro->throw;
		1228	coro->throw = 0;
		1229	sv_setsv (ERRSV, exception);
796	setup_coro (next);	1230	croak (0);
797	next->cursp = stacklevel;
798	}	1231	}
799	}	1232	}
800	}	1233	}
		1234	}
		1235
		1236	struct transfer_args
		1237	{
		1238	struct coro *prev, *next;
		1239	};
		1240
		1241	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1242	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1243
		1244	/** high level stuff ********************************************************/
		1245
		1246	static int
		1247	coro_state_destroy (pTHX_ struct coro *coro)
		1248	{
		1249	if (coro->flags & CF_DESTROYED)
		1250	return 0;
		1251
		1252	coro->flags |= CF_DESTROYED;
		1253
		1254	if (coro->flags & CF_READY)
		1255	{
		1256	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1257	/* alternative: look through all ready queues and remove the coro */
		1258	LOCK;
		1259	--coro_nready;
		1260	UNLOCK;
		1261	}
		1262	else
		1263	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1264
		1265	if (coro->mainstack && coro->mainstack != main_mainstack)
		1266	{
		1267	struct coro temp;
		1268
		1269	if (coro->flags & CF_RUNNING)
		1270	croak ("FATAL: tried to destroy currently running coroutine");
		1271
		1272	save_perl (aTHX_ &temp);
		1273	load_perl (aTHX_ coro);
		1274
		1275	coro_destroy (aTHX_ coro);
		1276
		1277	load_perl (aTHX_ &temp);
		1278
		1279	coro->slot = 0;
		1280	}
		1281
		1282	cctx_destroy (coro->cctx);
		1283	SvREFCNT_dec (coro->args);
		1284
		1285	if (coro->next) coro->next->prev = coro->prev;
		1286	if (coro->prev) coro->prev->next = coro->next;
		1287	if (coro == coro_first) coro_first = coro->next;
		1288
		1289	return 1;
		1290	}
		1291
		1292	static int
		1293	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1294	{
		1295	struct coro *coro = (struct coro *)mg->mg_ptr;
		1296	mg->mg_ptr = 0;
		1297
		1298	coro->hv = 0;
		1299
		1300	if (--coro->refcnt < 0)
		1301	{
		1302	coro_state_destroy (aTHX_ coro);
		1303	Safefree (coro);
		1304	}
		1305
		1306	return 0;
		1307	}
		1308
		1309	static int
		1310	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1311	{
		1312	struct coro *coro = (struct coro *)mg->mg_ptr;
		1313
		1314	++coro->refcnt;
		1315
		1316	return 0;
		1317	}
		1318
		1319	static MGVTBL coro_state_vtbl = {
		1320	0, 0, 0, 0,
		1321	coro_state_free,
		1322	0,
		1323	#ifdef MGf_DUP
		1324	coro_state_dup,
		1325	#else
		1326	# define MGf_DUP 0
		1327	#endif
		1328	};
		1329
		1330	static void
		1331	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1332	{
		1333	ta->prev = SvSTATE (prev_sv);
		1334	ta->next = SvSTATE (next_sv);
		1335	TRANSFER_CHECK (*ta);
		1336	}
		1337
		1338	static void
		1339	api_transfer (SV *prev_sv, SV *next_sv)
		1340	{
		1341	dTHX;
		1342	struct transfer_args ta;
		1343
		1344	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1345	TRANSFER (ta);
		1346	}
		1347
		1348	/** Coro ********************************************************************/
		1349
		1350	static void
		1351	coro_enq (pTHX_ SV *coro_sv)
		1352	{
		1353	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1354	}
		1355
		1356	static SV *
		1357	coro_deq (pTHX)
		1358	{
		1359	int prio;
		1360
		1361	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1362	if (AvFILLp (coro_ready [prio]) >= 0)
		1363	return av_shift (coro_ready [prio]);
		1364
		1365	return 0;
		1366	}
		1367
		1368	static int
		1369	api_ready (SV *coro_sv)
		1370	{
		1371	dTHX;
		1372	struct coro *coro;
		1373
		1374	if (SvROK (coro_sv))
		1375	coro_sv = SvRV (coro_sv);
		1376
		1377	coro = SvSTATE (coro_sv);
		1378
		1379	if (coro->flags & CF_READY)
		1380	return 0;
		1381
		1382	coro->flags |= CF_READY;
801		1383
802	LOCK;	1384	LOCK;
803	if (coro_mortal)	1385	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
804	{	1386	++coro_nready;
805	SvREFCNT_dec (coro_mortal);
806	coro_mortal = 0;
807	}
808	UNLOCK;	1387	UNLOCK;
809	}
810		1388
811	#define SV_CORO(sv,func) \	1389	return 1;
812	do { \	1390	}
813	if (SvROK (sv)) \
814	sv = SvRV (sv); \
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		1391
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1392	static int
		1393	api_is_ready (SV *coro_sv)
		1394	{
		1395	dTHX;
		1396	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1397	}
833		1398
834	static void	1399	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1400	prepare_schedule (pTHX_ struct transfer_args *ta)
836	{	1401	{
837	SV_CORO (prev, "Coro::transfer");	1402	SV *prev_sv, *next_sv;
838	SV_CORO (next, "Coro::transfer");
839		1403
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1404	for (;;)
841	}	1405	{
		1406	LOCK;
		1407	next_sv = coro_deq (aTHX);
842		1408
843	/** Coro ********************************************************************/	1409	/* nothing to schedule: call the idle handler */
		1410	if (expect_false (!next_sv))
		1411	{
		1412	dSP;
		1413	UNLOCK;
844		1414
845	#define PRIO_MAX 3	1415	ENTER;
846	#define PRIO_HIGH 1	1416	SAVETMPS;
847	#define PRIO_NORMAL 0
848	#define PRIO_LOW -1
849	#define PRIO_IDLE -3
850	#define PRIO_MIN -4
851		1417
852	/* for Coro.pm */	1418	PUSHMARK (SP);
853	static GV *coro_current, *coro_idle;	1419	PUTBACK;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	1420	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
855	static int coro_nready;	1421	SPAGAIN;
		1422
		1423	FREETMPS;
		1424	LEAVE;
		1425	continue;
		1426	}
		1427
		1428	ta->next = SvSTATE (next_sv);
		1429
		1430	/* cannot transfer to destroyed coros, skip and look for next */
		1431	if (expect_false (ta->next->flags & CF_DESTROYED))
		1432	{
		1433	UNLOCK;
		1434	SvREFCNT_dec (next_sv);
		1435	/* coro_nready is already taken care of by destroy */
		1436	continue;
		1437	}
		1438
		1439	--coro_nready;
		1440	UNLOCK;
		1441	break;
		1442	}
		1443
		1444	/* free this only after the transfer */
		1445	prev_sv = SvRV (coro_current);
		1446	ta->prev = SvSTATE (prev_sv);
		1447	TRANSFER_CHECK (*ta);
		1448	assert (ta->next->flags & CF_READY);
		1449	ta->next->flags &= ~CF_READY;
		1450	SvRV_set (coro_current, next_sv);
		1451
		1452	LOCK;
		1453	free_coro_mortal (aTHX);
		1454	coro_mortal = prev_sv;
		1455	UNLOCK;
		1456	}
856		1457
857	static void	1458	static void
858	coro_enq (pTHX_ SV *sv)	1459	prepare_cede (pTHX_ struct transfer_args *ta)
859	{	1460	{
860	if (SvTYPE (sv) == SVt_PVHV)	1461	api_ready (coro_current);
861	{	1462	prepare_schedule (aTHX_ ta);
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	1463	}
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864		1464
865	prio = prio > PRIO_MAX ? PRIO_MAX	1465	static int
866	: prio < PRIO_MIN ? PRIO_MIN	1466	prepare_cede_notself (pTHX_ struct transfer_args *ta)
867	: prio;	1467	{
868		1468	if (coro_nready)
869	av_push (coro_ready [prio - PRIO_MIN], sv);	1469	{
870	coro_nready++;	1470	SV *prev = SvRV (coro_current);
871		1471	prepare_schedule (aTHX_ ta);
		1472	api_ready (prev);
872	return;	1473	return 1;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}
877
878	static SV *
879	coro_deq (pTHX_ int min_prio)
880	{
881	int prio = PRIO_MAX - PRIO_MIN;
882
883	min_prio -= PRIO_MIN;
884	if (min_prio < 0)
885	min_prio = 0;
886
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready[prio]);
892	}	1474	}
893		1475	else
894	return 0;	1476	return 0;
895	}
896
897	static void
898	api_ready (SV *coro)
899	{
900	dTHX;
901
902	if (SvROK (coro))
903	coro = SvRV (coro);
904
905	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));
907	UNLOCK;
908	}	1477	}
909		1478
910	static void	1479	static void
911	api_schedule (void)	1480	api_schedule (void)
912	{	1481	{
913	dTHX;	1482	dTHX;
		1483	struct transfer_args ta;
914		1484
915	SV *prev, *next;	1485	prepare_schedule (aTHX_ &ta);
		1486	TRANSFER (ta);
		1487	}
916		1488
917	LOCK;	1489	static int
		1490	api_cede (void)
		1491	{
		1492	dTHX;
		1493	struct transfer_args ta;
918		1494
919	prev = SvRV (GvSV (coro_current));	1495	prepare_cede (aTHX_ &ta);
920	next = coro_deq (aTHX_ PRIO_MIN);
921		1496
922	if (!next)	1497	if (expect_true (ta.prev != ta.next))
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1498	{
		1499	TRANSFER (ta);
		1500	return 1;
		1501	}
		1502	else
		1503	return 0;
		1504	}
924		1505
925	/* free this only after the transfer */	1506	static int
926	coro_mortal = prev;	1507	api_cede_notself (void)
927	SV_CORO (prev, "Coro::schedule");	1508	{
		1509	dTHX;
		1510	struct transfer_args ta;
928		1511
929	SvRV (GvSV (coro_current)) = next;	1512	if (prepare_cede_notself (aTHX_ &ta))
930		1513	{
931	SV_CORO (next, "Coro::schedule");	1514	TRANSFER (ta);
932		1515	return 1;
933	UNLOCK;	1516	}
934		1517	else
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1518	return 0;
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1519	}
938		1520
939	static void	1521	static void
940	api_cede (void)	1522	api_trace (SV *coro_sv, int flags)
941	{	1523	{
942	dTHX;	1524	dTHX;
		1525	struct coro *coro = SvSTATE (coro_sv);
943		1526
944	LOCK;	1527	if (flags & CC_TRACE)
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1528	{
946	UNLOCK;	1529	if (!coro->cctx)
		1530	coro->cctx = cctx_new ();
		1531	else if (!(coro->cctx->flags & CC_TRACE))
		1532	croak ("cannot enable tracing on coroutine with custom stack");
947		1533
948	api_schedule ();	1534	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
949	}	1535	}
		1536	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1537	{
		1538	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
950		1539
		1540	if (coro->flags & CF_RUNNING)
		1541	PL_runops = RUNOPS_DEFAULT;
		1542	else
		1543	coro->slot->runops = RUNOPS_DEFAULT;
		1544	}
		1545	}
		1546
951	MODULE = Coro::State PACKAGE = Coro::State	1547	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
952		1548
953	PROTOTYPES: ENABLE	1549	PROTOTYPES: DISABLE
954		1550
955	BOOT:	1551	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1552	{
957	#ifdef USE_ITHREADS	1553	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1554	MUTEX_INIT (&coro_mutex);
959	#endif	1555	#endif
		1556	BOOT_PAGESIZE;
960		1557
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1558	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1559	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1560
		1561	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1562	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1563	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1564	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1565
		1566	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1567	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1568	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1569
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1570	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1571
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1572	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1573	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1574	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
969		1576
970	main_mainstack = PL_mainstack;	1577	main_mainstack = PL_mainstack;
		1578	main_top_env = PL_top_env;
		1579
		1580	while (main_top_env->je_prev)
		1581	main_top_env = main_top_env->je_prev;
971		1582
972	coroapi.ver = CORO_API_VERSION;	1583	coroapi.ver = CORO_API_VERSION;
		1584	coroapi.rev = CORO_API_REVISION;
973	coroapi.transfer = api_transfer;	1585	coroapi.transfer = api_transfer;
974	}
975		1586
976	Coro::State	1587	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1588	}
978	SV * args	1589
979	PROTOTYPE: $	1590	SV *
		1591	new (char *klass, ...)
980	CODE:	1592	CODE:
981	Coro__State coro;	1593	{
		1594	struct coro *coro;
		1595	MAGIC *mg;
		1596	HV *hv;
		1597	int i;
982		1598
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1599	Newz (0, coro, 1, struct coro);
		1600	coro->args = newAV ();
		1601	coro->flags = CF_NEW;
987		1602
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1603	if (coro_first) coro_first->prev = coro;
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1604	coro->next = coro_first;
990	/*coro->stack = 0;*/	1605	coro_first = coro;
991		1606
992	/* same as JMPENV_BOOTSTRAP */	1607	coro->hv = hv = newHV ();
993	/* we might be able to recycle start_env, but safe is safe */	1608	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1609	mg->mg_flags |= MGf_DUP;
995	coro->start_env.je_ret = -1;	1610	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
996	coro->start_env.je_mustcatch = TRUE;
997		1611
998	RETVAL = coro;	1612	av_extend (coro->args, items - 1);
		1613	for (i = 1; i < items; i++)
		1614	av_push (coro->args, newSVsv (ST (i)));
		1615	}
999	OUTPUT:	1616	OUTPUT:
1000	RETVAL	1617	RETVAL
1001		1618
		1619	# these not obviously related functions are all rolled into the same xs
		1620	# function to increase chances that they all will call transfer with the same
		1621	# stack offset
1002	void	1622	void
1003	transfer(prev, next, flags)	1623	_set_stacklevel (...)
1004	SV *prev	1624	ALIAS:
1005	SV *next	1625	Coro::State::transfer = 1
1006	int flags	1626	Coro::schedule = 2
1007	PROTOTYPE: @	1627	Coro::cede = 3
		1628	Coro::cede_notself = 4
1008	CODE:	1629	CODE:
		1630	{
		1631	struct transfer_args ta;
		1632
1009	PUTBACK;	1633	PUTBACK;
1010	SV_CORO (next, "Coro::transfer");	1634	switch (ix)
1011	SV_CORO (prev, "Coro::transfer");	1635	{
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1636	case 0:
		1637	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1638	ta.next = 0;
		1639	break;
		1640
		1641	case 1:
		1642	if (items != 2)
		1643	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1644
		1645	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1646	break;
		1647
		1648	case 2:
		1649	prepare_schedule (aTHX_ &ta);
		1650	break;
		1651
		1652	case 3:
		1653	prepare_cede (aTHX_ &ta);
		1654	break;
		1655
		1656	case 4:
		1657	if (!prepare_cede_notself (aTHX_ &ta))
		1658	XSRETURN_EMPTY;
		1659
		1660	break;
		1661	}
1013	SPAGAIN;	1662	SPAGAIN;
1014		1663
		1664	BARRIER;
		1665	PUTBACK;
		1666	TRANSFER (ta);
		1667	SPAGAIN; /* might be the sp of a different coroutine now */
		1668	/* be extra careful not to ever do anything after TRANSFER */
		1669	}
		1670
		1671	bool
		1672	_destroy (SV *coro_sv)
		1673	CODE:
		1674	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1675	OUTPUT:
		1676	RETVAL
		1677
1015	void	1678	void
1016	DESTROY(coro)
1017	Coro::State coro
1018	CODE:
1019
1020	if (coro->mainstack && coro->mainstack != main_mainstack)
1021	{
1022	struct coro temp;
1023
1024	PUTBACK;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026	LOAD (aTHX_ coro);
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040
1041	void
1042	_exit(code)	1679	_exit (code)
1043	int code	1680	int code
1044	PROTOTYPE: $	1681	PROTOTYPE: $
1045	CODE:	1682	CODE:
1046	_exit (code);	1683	_exit (code);
1047		1684
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1685	int
		1686	cctx_stacksize (int new_stacksize = 0)
		1687	CODE:
		1688	RETVAL = coro_stacksize;
		1689	if (new_stacksize)
		1690	coro_stacksize = new_stacksize;
		1691	OUTPUT:
		1692	RETVAL
1049		1693
1050	# this is slightly dirty (should expose a c-level api)	1694	int
		1695	cctx_count ()
		1696	CODE:
		1697	RETVAL = cctx_count;
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	int
		1702	cctx_idle ()
		1703	CODE:
		1704	RETVAL = cctx_idle;
		1705	OUTPUT:
		1706	RETVAL
1051		1707
1052	void	1708	void
1053	yield(...)	1709	list ()
1054	PROTOTYPE: @	1710	PPCODE:
		1711	{
		1712	struct coro *coro;
		1713	for (coro = coro_first; coro; coro = coro->next)
		1714	if (coro->hv)
		1715	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1716	}
		1717
		1718	void
		1719	call (Coro::State coro, SV *coderef)
		1720	ALIAS:
		1721	eval = 1
		1722	CODE:
		1723	{
		1724	if (coro->mainstack)
		1725	{
		1726	struct coro temp;
		1727
		1728	if (!(coro->flags & CF_RUNNING))
		1729	{
		1730	PUTBACK;
		1731	save_perl (aTHX_ &temp);
		1732	load_perl (aTHX_ coro);
		1733	}
		1734
		1735	{
		1736	dSP;
		1737	ENTER;
		1738	SAVETMPS;
		1739	PUTBACK;
		1740	PUSHSTACK;
		1741	PUSHMARK (SP);
		1742
		1743	if (ix)
		1744	eval_sv (coderef, 0);
		1745	else
		1746	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1747
		1748	POPSTACK;
		1749	SPAGAIN;
		1750	FREETMPS;
		1751	LEAVE;
		1752	PUTBACK;
		1753	}
		1754
		1755	if (!(coro->flags & CF_RUNNING))
		1756	{
		1757	save_perl (aTHX_ coro);
		1758	load_perl (aTHX_ &temp);
		1759	SPAGAIN;
		1760	}
		1761	}
		1762	}
		1763
		1764	SV *
		1765	is_ready (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	is_ready = CF_READY
		1769	is_running = CF_RUNNING
		1770	is_new = CF_NEW
		1771	is_destroyed = CF_DESTROYED
		1772	CODE:
		1773	RETVAL = boolSV (coro->flags & ix);
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	void
		1778	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1779
		1780	SV *
		1781	has_stack (Coro::State coro)
		1782	PROTOTYPE: $
		1783	CODE:
		1784	RETVAL = boolSV (!!coro->cctx);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	int
		1789	is_traced (Coro::State coro)
		1790	PROTOTYPE: $
		1791	CODE:
		1792	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1793	OUTPUT:
		1794	RETVAL
		1795
		1796	IV
		1797	rss (Coro::State coro)
		1798	PROTOTYPE: $
		1799	ALIAS:
		1800	usecount = 1
1055	CODE:	1801	CODE:
1056	static SV *returnstk;	1802	switch (ix)
1057	SV *sv;	1803	{
1058	AV *defav = GvAV (PL_defgv);	1804	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	struct coro *prev, *next;	1805	case 1: RETVAL = coro->usecount; break;
		1806	}
		1807	OUTPUT:
		1808	RETVAL
1060		1809
1061	if (!returnstk)	1810	void
1062	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));	1811	force_cctx ()
1063		1812	CODE:
1064	/* set up @_ -- ugly */	1813	struct coro *coro = SvSTATE (coro_current);
1065	av_clear (defav);	1814	coro->cctx->idle_sp = 0;
1066	av_fill (defav, items - 1);
1067	while (items--)
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071	sv = av_pop ((AV *)SvRV (returnstk));
1072	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074	SvREFCNT_dec (sv);
1075
1076	transfer (aTHX_ prev, next, 0);
1077		1815
1078	MODULE = Coro::State PACKAGE = Coro	1816	MODULE = Coro::State PACKAGE = Coro
1079		1817
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1818	BOOT:
1083	{	1819	{
1084	int i;	1820	int i;
		1821
		1822	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1823	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1824	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1825
		1826	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1827	SvREADONLY_on (coro_current);
		1828
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1829	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1830
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1831	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1832	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1833	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1834	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1835	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1836	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1096		1837
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1838	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098	coro_ready[i] = newAV ();	1839	coro_ready[i] = newAV ();
1099		1840
1100	{	1841	{
1101	SV *sv = perl_get_sv("Coro::API", 1);	1842	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1843	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1102		1844
1103	coroapi.schedule = api_schedule;	1845	coroapi.schedule = api_schedule;
1104	coroapi.cede = api_cede;	1846	coroapi.cede = api_cede;
		1847	coroapi.cede_notself = api_cede_notself;
1105	coroapi.ready = api_ready;	1848	coroapi.ready = api_ready;
		1849	coroapi.is_ready = api_is_ready;
1106	coroapi.nready = &coro_nready;	1850	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1851	coroapi.current = coro_current;
1108		1852
1109	GCoroAPI = &coroapi;	1853	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1854	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1855	SvREADONLY_on (sv);
1112	}	1856	}
1113	}	1857	}
1114		1858
1115	#if !PERL_MICRO
1116
1117	void	1859	void
1118	ready(self)	1860	_set_current (SV *current)
1119	SV * self
1120	PROTOTYPE: $	1861	PROTOTYPE: $
1121	CODE:	1862	CODE:
1122	api_ready (self);	1863	SvREFCNT_dec (SvRV (coro_current));
1123		1864	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1124	#endif
1125		1865
1126	int	1866	int
		1867	prio (Coro::State coro, int newprio = 0)
		1868	ALIAS:
		1869	nice = 1
		1870	CODE:
		1871	{
		1872	RETVAL = coro->prio;
		1873
		1874	if (items > 1)
		1875	{
		1876	if (ix)
		1877	newprio = coro->prio - newprio;
		1878
		1879	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1880	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1881
		1882	coro->prio = newprio;
		1883	}
		1884	}
		1885	OUTPUT:
		1886	RETVAL
		1887
		1888	SV *
		1889	ready (SV *self)
		1890	PROTOTYPE: $
		1891	CODE:
		1892	RETVAL = boolSV (api_ready (self));
		1893	OUTPUT:
		1894	RETVAL
		1895
		1896	int
1127	nready(...)	1897	nready (...)
1128	PROTOTYPE:	1898	PROTOTYPE:
1129	CODE:	1899	CODE:
1130	RETVAL = coro_nready;	1900	RETVAL = coro_nready;
1131	OUTPUT:	1901	OUTPUT:
1132	RETVAL	1902	RETVAL
1133		1903
1134	void	1904	void
1135	schedule(...)	1905	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1906	PROTOTYPE: $;$
		1907	CODE:
		1908	SvREFCNT_dec (self->throw);
		1909	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1910
		1911	void
		1912	swap_defsv (Coro::State self)
1136	PROTOTYPE:	1913	PROTOTYPE: $
		1914	ALIAS:
		1915	swap_defav = 1
		1916	CODE:
		1917	if (!self->slot)
		1918	croak ("cannot swap state with coroutine that has no saved state");
		1919	else
		1920	{
		1921	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1922	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1923
		1924	SV *tmp = *src; *src = *dst; *dst = tmp;
		1925	}
		1926
		1927	# for async_pool speedup
		1928	void
		1929	_pool_1 (SV *cb)
1137	CODE:	1930	CODE:
1138	api_schedule ();	1931	{
		1932	struct coro *coro = SvSTATE (coro_current);
		1933	HV *hv = (HV *)SvRV (coro_current);
		1934	AV *defav = GvAV (PL_defgv);
		1935	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1936	AV *invoke_av;
		1937	int i, len;
		1938
		1939	if (!invoke)
		1940	{
		1941	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1942	croak ("\3async_pool terminate\2\n");
		1943	}
		1944
		1945	SvREFCNT_dec (coro->saved_deffh);
		1946	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1947
		1948	hv_store (hv, "desc", sizeof ("desc") - 1,
		1949	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1950
		1951	invoke_av = (AV *)SvRV (invoke);
		1952	len = av_len (invoke_av);
		1953
		1954	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1955
		1956	if (len > 0)
		1957	{
		1958	av_fill (defav, len - 1);
		1959	for (i = 0; i < len; ++i)
		1960	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1961	}
		1962
		1963	SvREFCNT_dec (invoke);
		1964	}
1139		1965
1140	void	1966	void
1141	cede(...)	1967	_pool_2 (SV *cb)
1142	PROTOTYPE:
1143	CODE:	1968	CODE:
1144	api_cede ();	1969	{
		1970	struct coro *coro = SvSTATE (coro_current);
1145		1971
		1972	sv_setsv (cb, &PL_sv_undef);
		1973
		1974	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1975	coro->saved_deffh = 0;
		1976
		1977	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1978	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1979	{
		1980	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1981	croak ("\3async_pool terminate\2\n");
		1982	}
		1983
		1984	av_clear (GvAV (PL_defgv));
		1985	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1986	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1987
		1988	coro->prio = 0;
		1989
		1990	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1991	api_trace (coro_current, 0);
		1992
		1993	av_push (av_async_pool, newSVsv (coro_current));
		1994	}
		1995
		1996
		1997	MODULE = Coro::State PACKAGE = Coro::AIO
		1998
		1999	SV *
		2000	_get_state ()
		2001	CODE:
		2002	{
		2003	struct io_state *data;
		2004
		2005	RETVAL = newSV (sizeof (struct io_state));
		2006	data = (struct io_state *)SvPVX (RETVAL);
		2007	SvCUR_set (RETVAL, sizeof (struct io_state));
		2008	SvPOK_only (RETVAL);
		2009
		2010	data->errorno = errno;
		2011	data->laststype = PL_laststype;
		2012	data->laststatval = PL_laststatval;
		2013	data->statcache = PL_statcache;
		2014	}
		2015	OUTPUT:
		2016	RETVAL
		2017
		2018	void
		2019	_set_state (char *data_)
		2020	PROTOTYPE: $
		2021	CODE:
		2022	{
		2023	struct io_state *data = (void *)data_;
		2024
		2025	errno = data->errorno;
		2026	PL_laststype = data->laststype;
		2027	PL_laststatval = data->laststatval;
		2028	PL_statcache = data->statcache;
		2029	}
		2030

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