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Comparing Coro/Coro/State.xs (file contents):
Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs.
Revision 1.193 by root, Fri Oct 5 23:38:40 2007 UTC

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

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