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