[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs.
Revision 1.246 by root, Wed Sep 24 21:20:05 2008 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
		5
1	#include "EXTERN.h"	6	#include "EXTERN.h"
2	#include "perl.h"	7	#include "perl.h"
3	#include "XSUB.h"	8	#include "XSUB.h"
		9	#include "perliol.h"
4		10
5	#if 1	11	#include "patchlevel.h"
6	# define CHK(x) (void *)0	12
		13	#include <stdio.h>
		14	#include <errno.h>
		15	#include <assert.h>
		16
		17	#ifdef WIN32
		18	# undef setjmp
		19	# undef longjmp
		20	# undef _exit
		21	# define setjmp _setjmp // deep magic, don't ask
7	#else	22	#else
8	# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x)	23	# include <inttypes.h> /* most portable stdint.h */
		24	#endif
		25
		26	#ifdef HAVE_MMAP
		27	# include <unistd.h>
		28	# include <sys/mman.h>
		29	# ifndef MAP_ANONYMOUS
		30	# ifdef MAP_ANON
		31	# define MAP_ANONYMOUS MAP_ANON
		32	# else
		33	# undef HAVE_MMAP
		34	# endif
9	#endif	35	# endif
		36	# include <limits.h>
		37	# ifndef PAGESIZE
		38	# define PAGESIZE pagesize
		39	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		40	static long pagesize;
		41	# else
		42	# define BOOT_PAGESIZE (void)0
		43	# endif
		44	#else
		45	# define PAGESIZE 0
		46	# define BOOT_PAGESIZE (void)0
		47	#endif
10		48
11	#define MAY_FLUSH /* increases codesize */	49	#if CORO_USE_VALGRIND
		50	# include <valgrind/valgrind.h>
		51	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		52	#else
		53	# define REGISTER_STACK(cctx,start,end)
		54	#endif
12		55
13	#define SAVE_DEFAV 0x00000001	56	/* the maximum number of idle cctx that will be pooled */
14	#define SAVE_DEFSV 0x00000002	57	#define MAX_IDLE_CCTX 8
15	#define SAVE_ERRSV 0x00000004
16		58
17	#define SAVE_ALL -1	59	#define PERL_VERSION_ATLEAST(a,b,c) \
		60	(PERL_REVISION > (a) \
		61	\|\| (PERL_REVISION == (a) \
		62	&& (PERL_VERSION > (b) \
		63	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18		64
		65	#if !PERL_VERSION_ATLEAST (5,6,0)
		66	# ifndef PL_ppaddr
		67	# define PL_ppaddr ppaddr
		68	# endif
		69	# ifndef call_sv
		70	# define call_sv perl_call_sv
		71	# endif
		72	# ifndef get_sv
		73	# define get_sv perl_get_sv
		74	# endif
		75	# ifndef get_cv
		76	# define get_cv perl_get_cv
		77	# endif
		78	# ifndef IS_PADGV
		79	# define IS_PADGV(v) 0
		80	# endif
		81	# ifndef IS_PADCONST
		82	# define IS_PADCONST(v) 0
		83	# endif
		84	#endif
		85
		86	/* 5.8.8 */
		87	#ifndef GV_NOTQUAL
		88	# define GV_NOTQUAL 0
		89	#endif
		90	#ifndef newSV
		91	# define newSV(l) NEWSV(0,l)
		92	#endif
		93
		94	/* 5.11 */
		95	#ifndef CxHASARGS
		96	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		97	#endif
		98
		99	/* 5.8.7 */
		100	#ifndef SvRV_set
		101	# define SvRV_set(s,v) SvRV(s) = (v)
		102	#endif
		103
		104	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		105	# undef CORO_STACKGUARD
		106	#endif
		107
		108	#ifndef CORO_STACKGUARD
		109	# define CORO_STACKGUARD 0
		110	#endif
		111
		112	/* prefer perl internal functions over our own? */
		113	#ifndef CORO_PREFER_PERL_FUNCTIONS
		114	# define CORO_PREFER_PERL_FUNCTIONS 0
		115	#endif
		116
		117	/* The next macros try to return the current stack pointer, in an as
		118	* portable way as possible. */
		119	#define dSTACKLEVEL volatile char stacklevel
		120	#define STACKLEVEL ((void *)&stacklevel)
		121
		122	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		123
		124	#if __GNUC__ >= 3
		125	# define attribute(x) __attribute__(x)
		126	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		127	# define expect(expr,value) __builtin_expect ((expr),(value))
		128	#else
		129	# define attribute(x)
		130	# define BARRIER
		131	# define expect(expr,value) (expr)
		132	#endif
		133
		134	#define expect_false(expr) expect ((expr) != 0, 0)
		135	#define expect_true(expr) expect ((expr) != 0, 1)
		136
		137	#define NOINLINE attribute ((noinline))
		138
		139	#include "CoroAPI.h"
		140
		141	#ifdef USE_ITHREADS
		142	static perl_mutex coro_mutex;
		143	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		144	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		145	#else
		146	# define LOCK (void)0
		147	# define UNLOCK (void)0
		148	#endif
		149
		150	/* helper storage struct for Coro::AIO */
		151	struct io_state
		152	{
		153	int errorno;
		154	I32 laststype;
		155	int laststatval;
		156	Stat_t statcache;
		157	};
		158
		159	static double (nvtime)(); / so why doesn't it take void? */
		160
		161	static size_t coro_stacksize = CORO_STACKSIZE;
		162	static struct CoroAPI coroapi;
		163	static AV main_mainstack; / used to differentiate between $main and others */
		164	static JMPENV *main_top_env;
		165	static HV coro_state_stash, coro_stash;
		166	static volatile SV coro_mortal; / will be freed after next transfer */
		167
		168	static GV irsgv; / $/ */
		169	static GV stdoutgv; / STDOUT /
		170	static SV *rv_diehook;
		171	static SV *rv_warnhook;
		172	static HV hv_sig; / %SIG */
		173
		174	/* async_pool helper stuff */
		175	static SV *sv_pool_rss;
		176	static SV *sv_pool_size;
		177	static AV *av_async_pool;
		178
		179	/* Coro::AnyEvent */
		180	static SV *sv_activity;
		181
		182	static struct coro_cctx *cctx_first;
		183	static int cctx_count, cctx_idle;
		184
		185	enum {
		186	CC_MAPPED = 0x01,
		187	CC_NOREUSE = 0x02, /* throw this away after tracing */
		188	CC_TRACE = 0x04,
		189	CC_TRACE_SUB = 0x08, /* trace sub calls */
		190	CC_TRACE_LINE = 0x10, /* trace each statement */
		191	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		192	};
		193
		194	/* this is a structure representing a c-level coroutine */
		195	typedef struct coro_cctx {
		196	struct coro_cctx *next;
		197
		198	/* the stack */
		199	void *sptr;
		200	size_t ssize;
		201
		202	/* cpu state */
		203	void idle_sp; / sp of top-level transfer/schedule/cede call */
		204	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		205	JMPENV *top_env;
		206	coro_context cctx;
		207
		208	#if CORO_USE_VALGRIND
		209	int valgrind_id;
		210	#endif
		211	unsigned char flags;
		212	} coro_cctx;
		213
		214	enum {
		215	CF_RUNNING = 0x0001, /* coroutine is running */
		216	CF_READY = 0x0002, /* coroutine is ready */
		217	CF_NEW = 0x0004, /* has never been switched to */
		218	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		219	};
		220
		221	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		222	typedef struct {
		223	SV *defsv;
		224	AV *defav;
		225	SV *errsv;
		226	SV *irsgv;
		227	#define VAR(name,type) type name;
		228	# include "state.h"
		229	#undef VAR
		230	} perl_slots;
		231
		232	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		233
		234	/* this is a structure representing a perl-level coroutine */
19	struct coro {	235	struct coro {
20	/* optionally saved, might be zero */	236	/* the c coroutine allocated to this perl coroutine, if any */
21	AV *defav;	237	coro_cctx *cctx;
22	SV *defsv;
23	SV *errsv;
24
25	/* saved global state not related to stacks */
26	U8 dowarn;
27		238
28	/* the stacks and related info (callchain etc..) */	239	/* process data */
29	PERL_SI *curstackinfo;
30	AV *curstack;
31	AV *mainstack;	240	AV *mainstack;
32	SV **stack_sp;	241	perl_slots slot; / basically the saved sp */
33	OP *op;
34	SV **curpad;
35	SV **stack_base;
36	SV **stack_max;
37	SV **tmps_stack;
38	I32 tmps_floor;
39	I32 tmps_ix;
40	I32 tmps_max;
41	I32 *markstack;
42	I32 *markstack_ptr;
43	I32 *markstack_max;
44	I32 *scopestack;
45	I32 scopestack_ix;
46	I32 scopestack_max;
47	ANY *savestack;
48	I32 savestack_ix;
49	I32 savestack_max;
50	OP **retstack;
51	I32 retstack_ix;
52	I32 retstack_max;
53	COP *curcop;
54		242
55	/* data associated with this coroutine (initial args) */	243	AV args; / data associated with this coroutine (initial args) */
56	AV *args;	244	int refcnt; /* coroutines are refcounted, yes */
		245	int flags; /* CF_ flags */
		246	HV hv; / the perl hash associated with this coro, if any */
		247
		248	/* statistics */
		249	int usecount; /* number of transfers to this coro */
		250
		251	/* coro process data */
		252	int prio;
		253	SV throw; / exception to be thrown */
		254
		255	/* async_pool */
		256	SV *saved_deffh;
		257
		258	/* linked list */
		259	struct coro next, prev;
57	};	260	};
58		261
59	typedef struct coro *Coro__State;	262	typedef struct coro *Coro__State;
60	typedef struct coro *Coro__State_or_hashref;	263	typedef struct coro *Coro__State_or_hashref;
61		264
62	static HV *padlist_cache;	265	/ Coro ******************************************************************/
63		266
64	/* mostly copied from op.c:cv_clone2 */	267	#define PRIO_MAX 3
65	STATIC AV *	268	#define PRIO_HIGH 1
66	clone_padlist (AV *protopadlist)	269	#define PRIO_NORMAL 0
		270	#define PRIO_LOW -1
		271	#define PRIO_IDLE -3
		272	#define PRIO_MIN -4
		273
		274	/* for Coro.pm */
		275	static SV *coro_current;
		276	static SV *coro_readyhook;
		277	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		278	static int coro_nready;
		279	static struct coro *coro_first;
		280
		281	/ lowlevel stuff ********************************************************/
		282
		283	static SV *
		284	coro_get_sv (pTHX_ const char *name, int create)
67	{	285	{
68	AV *av;	286	#if PERL_VERSION_ATLEAST (5,10,0)
69	I32 ix;	287	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
70	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);	288	get_sv (name, create);
71	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);	289	#endif
72	SV **pname = AvARRAY (protopad_name);	290	return get_sv (name, create);
73	SV **ppad = AvARRAY (protopad);	291	}
74	I32 fname = AvFILLp (protopad_name);	292
75	I32 fpad = AvFILLp (protopad);	293	static AV *
		294	coro_get_av (pTHX_ const char *name, int create)
		295	{
		296	#if PERL_VERSION_ATLEAST (5,10,0)
		297	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		298	get_av (name, create);
		299	#endif
		300	return get_av (name, create);
		301	}
		302
		303	static HV *
		304	coro_get_hv (pTHX_ const char *name, int create)
		305	{
		306	#if PERL_VERSION_ATLEAST (5,10,0)
		307	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		308	get_hv (name, create);
		309	#endif
		310	return get_hv (name, create);
		311	}
		312
		313	static AV *
		314	coro_clone_padlist (pTHX_ CV *cv)
		315	{
		316	AV *padlist = CvPADLIST (cv);
76	AV newpadlist, newpad_name, *newpad;	317	AV newpadlist, newpad;
77	SV **npad;
78
79	newpad_name = newAV ();
80	for (ix = fname; ix >= 0; ix--)
81	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
82
83	newpad = newAV ();
84	av_fill (newpad, AvFILLp (protopad));
85	npad = AvARRAY (newpad);
86		318
87	newpadlist = newAV ();	319	newpadlist = newAV ();
88	AvREAL_off (newpadlist);	320	AvREAL_off (newpadlist);
89	av_store (newpadlist, 0, (SV *) newpad_name);	321	#if PERL_VERSION_ATLEAST (5,10,0)
		322	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		323	#else
		324	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		325	#endif
		326	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		327	--AvFILLp (padlist);
		328
		329	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
90	av_store (newpadlist, 1, (SV *) newpad);	330	av_store (newpadlist, 1, (SV *)newpad);
91		331
92	av = newAV (); /* will be @_ */	332	return newpadlist;
93	av_extend (av, 0);	333	}
94	av_store (newpad, 0, (SV *) av);
95	AvFLAGS (av) = AVf_REIFY;
96		334
97	for (ix = fpad; ix > 0; ix--)	335	static void
		336	free_padlist (pTHX_ AV *padlist)
		337	{
		338	/* may be during global destruction */
		339	if (SvREFCNT (padlist))
98	{	340	{
99	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	341	I32 i = AvFILLp (padlist);
100	if (namesv && namesv != &PL_sv_undef)	342	while (i >= 0)
101	{	343	{
102	char name = SvPVX (namesv); / XXX */	344	SV **svp = av_fetch (padlist, i--, FALSE);
103	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	345	if (svp)
104	{ /* lexical from outside? */
105	npad[ix] = SvREFCNT_inc (ppad[ix]);
106	}	346	{
107	else
108	{ /* our own lexical */
109	SV *sv;	347	SV *sv;
110	if (*name == '&')	348	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
111	sv = SvREFCNT_inc (ppad[ix]);	349	SvREFCNT_dec (sv);
112	else if (*name == '@')	350
113	sv = (SV *) newAV ();	351	SvREFCNT_dec (*svp);
114	else if (*name == '%')
115	sv = (SV *) newHV ();
116	else
117	sv = NEWSV (0, 0);
118	if (!SvPADBUSY (sv))
119	SvPADMY_on (sv);
120	npad[ix] = sv;
121	}	352	}
122	}	353	}
123	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
124	{
125	npad[ix] = SvREFCNT_inc (ppad[ix]);
126	}
127	else
128	{
129	SV *sv = NEWSV (0, 0);
130	SvPADTMP_on (sv);
131	npad[ix] = sv;
132	}
133	}
134		354
135	#if 0 /* return -ENOTUNDERSTOOD */
136	/* Now that vars are all in place, clone nested closures. */
137
138	for (ix = fpad; ix > 0; ix--) {
139	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
140	if (namesv
141	&& namesv != &PL_sv_undef
142	&& !(SvFLAGS(namesv) & SVf_FAKE)
143	&& *SvPVX(namesv) == '&'
144	&& CvCLONE(ppad[ix]))
145	{
146	CV kid = cv_clone((CV)ppad[ix]);
147	SvREFCNT_dec(ppad[ix]);
148	CvCLONE_on(kid);
149	SvPADMY_on(kid);
150	npad[ix] = (SV*)kid;
151	}
152	}
153	#endif
154
155	return newpadlist;
156	}
157
158	#ifdef MAY_FLUSH
159	STATIC AV *
160	free_padlist (AV *padlist)
161	{
162	/* may be during global destruction */
163	if (SvREFCNT(padlist))
164	{
165	I32 i = AvFILLp(padlist);
166	while (i >= 0)
167	{
168	SV **svp = av_fetch(padlist, i--, FALSE);
169	SV sv = svp ? svp : Nullsv;
170	if (sv)
171	SvREFCNT_dec(sv);
172	}
173
174	SvREFCNT_dec((SV*)padlist);	355	SvREFCNT_dec ((SV*)padlist);
175	}	356	}
176	}	357	}
177	#endif	358
		359	static int
		360	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		361	{
		362	AV *padlist;
		363	AV av = (AV )mg->mg_obj;
		364
		365	/* casting is fun. */
		366	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		367	free_padlist (aTHX_ padlist);
		368
		369	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
		370
		371	return 0;
		372	}
		373
		374	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		375	#define CORO_MAGIC_type_state PERL_MAGIC_ext
		376
		377	static MGVTBL coro_cv_vtbl = {
		378	0, 0, 0, 0,
		379	coro_cv_free
		380	};
		381
		382	#define CORO_MAGIC(sv,type) \
		383	SvMAGIC (sv) \
		384	? SvMAGIC (sv)->mg_type == type \
		385	? SvMAGIC (sv) \
		386	: mg_find (sv, type) \
		387	: 0
		388
		389	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		390	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		391
		392	static struct coro *
		393	SvSTATE_ (pTHX_ SV *coro)
		394	{
		395	HV *stash;
		396	MAGIC *mg;
		397
		398	if (SvROK (coro))
		399	coro = SvRV (coro);
		400
		401	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		402	croak ("Coro::State object required");
		403
		404	stash = SvSTASH (coro);
		405	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		406	{
		407	/* very slow, but rare, check */
		408	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		409	croak ("Coro::State object required");
		410	}
		411
		412	mg = CORO_MAGIC_state (coro);
		413	return (struct coro *)mg->mg_ptr;
		414	}
		415
		416	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
178		417
179	/* the next two functions merely cache the padlists */	418	/* the next two functions merely cache the padlists */
180	STATIC void	419	static void
181	get_padlist (CV *cv)	420	get_padlist (pTHX_ CV *cv)
182	{	421	{
183	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
		423	AV *av;
184		424
185	if (he && AvFILLp ((AV )he) >= 0)	425	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
186	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	426	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
187	else	427	else
188	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
189	}
190
191	STATIC void
192	put_padlist (CV *cv)
193	{
194	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
195
196	if (SvTYPE (*he) != SVt_PVAV)
197	{	428	{
		429	#if CORO_PREFER_PERL_FUNCTIONS
		430	/* this is probably cleaner? but also slower! */
		431	/* in practise, it seems to be less stable */
		432	CV *cp = Perl_cv_clone (cv);
		433	CvPADLIST (cv) = CvPADLIST (cp);
		434	CvPADLIST (cp) = 0;
198	SvREFCNT_dec (*he);	435	SvREFCNT_dec (cp);
199	he = (SV )newAV ();	436	#else
		437	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		438	#endif
200	}	439	}
201
202	av_push ((AV )he, (SV *)CvPADLIST (cv));
203	}	440	}
204
205	#ifdef MAY_FLUSH
206	STATIC void
207	flush_padlist_cache ()
208	{
209	HV *hv = padlist_cache;
210	padlist_cache = newHV ();
211
212	if (hv_iterinit (hv))
213	{
214	HE *he;
215	AV *padlist;
216
217	while (!!(he = hv_iternext (hv)))
218	{
219	AV av = (AV )HeVAL(he);
220
221	/* casting is fun. */
222	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
223	free_padlist (padlist);
224	}
225	}
226
227	SvREFCNT_dec (hv);
228	}
229	#endif
230
231	#define SB do {
232	#define SE } while (0)
233
234	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE
235	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE
236
237	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
238		441
239	static void	442	static void
		443	put_padlist (pTHX_ CV *cv)
		444	{
		445	MAGIC *mg = CORO_MAGIC_cv (cv);
		446	AV *av;
		447
		448	if (expect_false (!mg))
		449	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
		450
		451	av = (AV *)mg->mg_obj;
		452
		453	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		454	av_extend (av, AvMAX (av) + 1);
		455
		456	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		457	}
		458
		459	/ load & save, init *****************************************************/
		460
		461	static void
240	load_state(pTHX_ Coro__State c)	462	load_perl (pTHX_ Coro__State c)
241	{	463	{
242	PL_dowarn = c->dowarn;	464	perl_slots *slot = c->slot;
		465	c->slot = 0;
243		466
244	PL_curstackinfo = c->curstackinfo;
245	PL_curstack = c->curstack;
246	PL_mainstack = c->mainstack;	467	PL_mainstack = c->mainstack;
247	PL_stack_sp = c->stack_sp;
248	PL_op = c->op;
249	PL_curpad = c->curpad;
250	PL_stack_base = c->stack_base;
251	PL_stack_max = c->stack_max;
252	PL_tmps_stack = c->tmps_stack;
253	PL_tmps_floor = c->tmps_floor;
254	PL_tmps_ix = c->tmps_ix;
255	PL_tmps_max = c->tmps_max;
256	PL_markstack = c->markstack;
257	PL_markstack_ptr = c->markstack_ptr;
258	PL_markstack_max = c->markstack_max;
259	PL_scopestack = c->scopestack;
260	PL_scopestack_ix = c->scopestack_ix;
261	PL_scopestack_max = c->scopestack_max;
262	PL_savestack = c->savestack;
263	PL_savestack_ix = c->savestack_ix;
264	PL_savestack_max = c->savestack_max;
265	PL_retstack = c->retstack;
266	PL_retstack_ix = c->retstack_ix;
267	PL_retstack_max = c->retstack_max;
268	PL_curcop = c->curcop;
269		468
270	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	469	GvSV (PL_defgv) = slot->defsv;
271	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	470	GvAV (PL_defgv) = slot->defav;
272	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	471	GvSV (PL_errgv) = slot->errsv;
		472	GvSV (irsgv) = slot->irsgv;
		473
		474	#define VAR(name,type) PL_ ## name = slot->name;
		475	# include "state.h"
		476	#undef VAR
273		477
274	{	478	{
275	dSP;	479	dSP;
		480
276	CV *cv;	481	CV *cv;
277		482
278	/* now do the ugly restore mess */	483	/* now do the ugly restore mess */
279	while ((cv = (CV *)POPs))	484	while (expect_true (cv = (CV *)POPs))
280	{	485	{
281	AV padlist = (AV )POPs;
282
283	if (padlist)
284	{
285	put_padlist (cv); /* mark this padlist as available */	486	put_padlist (aTHX_ cv); /* mark this padlist as available */
286	CvPADLIST(cv) = padlist;	487	CvDEPTH (cv) = PTR2IV (POPs);
287	#ifdef USE_THREADS	488	CvPADLIST (cv) = (AV *)POPs;
288	/CvOWNER(cv) = (struct perl_thread )POPs;*/
289	#endif
290	}
291
292	++CvDEPTH(cv);
293	}	489	}
294		490
295	PUTBACK;	491	PUTBACK;
296	}	492	}
297	}	493	}
298		494
299	static void	495	static void
300	save_state(pTHX_ Coro__State c, int flags)	496	save_perl (pTHX_ Coro__State c)
301	{	497	{
302	{	498	{
303	dSP;	499	dSP;
304	I32 cxix = cxstack_ix;	500	I32 cxix = cxstack_ix;
		501	PERL_CONTEXT *ccstk = cxstack;
305	PERL_SI *top_si = PL_curstackinfo;	502	PERL_SI *top_si = PL_curstackinfo;
306	PERL_CONTEXT *ccstk = cxstack;
307		503
308	/*	504	/*
309	* the worst thing you can imagine happens first - we have to save	505	* the worst thing you can imagine happens first - we have to save
310	* (and reinitialize) all cv's in the whole callchain :(	506	* (and reinitialize) all cv's in the whole callchain :(
311	*/	507	*/
312		508
313	PUSHs (Nullsv);	509	XPUSHs (Nullsv);
314	/* this loop was inspired by pp_caller */	510	/* this loop was inspired by pp_caller */
315	for (;;)	511	for (;;)
316	{	512	{
317	do	513	while (expect_true (cxix >= 0))
318	{	514	{
319	PERL_CONTEXT *cx = &ccstk[cxix--];	515	PERL_CONTEXT *cx = &ccstk[cxix--];
320		516
321	if (CxTYPE(cx) == CXt_SUB)	517	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
322	{	518	{
323	CV *cv = cx->blk_sub.cv;	519	CV *cv = cx->blk_sub.cv;
		520
324	if (CvDEPTH(cv))	521	if (expect_true (CvDEPTH (cv)))
325	{	522	{
326	#ifdef USE_THREADS
327	/XPUSHs ((SV )CvOWNER(cv));*/
328	/CvOWNER(cv) = 0;/
329	/error must unlock this cv etc.. etc.../
330	#endif
331	EXTEND (SP, CvDEPTH(cv)*2);	523	EXTEND (SP, 3);
332
333	while (--CvDEPTH(cv))
334	{
335	/* this tells the restore code to increment CvDEPTH */
336	PUSHs (Nullsv);
337	PUSHs ((SV *)cv);
338	}
339
340	PUSHs ((SV *)CvPADLIST(cv));	524	PUSHs ((SV *)CvPADLIST (cv));
		525	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
341	PUSHs ((SV *)cv);	526	PUSHs ((SV *)cv);
342		527
343	get_padlist (cv); /* this is a monster */	528	CvDEPTH (cv) = 0;
		529	get_padlist (aTHX_ cv);
344	}	530	}
345	}	531	}
346	else if (CxTYPE(cx) == CXt_FORMAT)	532	}
		533
		534	if (expect_true (top_si->si_type == PERLSI_MAIN))
		535	break;
		536
		537	top_si = top_si->si_prev;
		538	ccstk = top_si->si_cxstack;
		539	cxix = top_si->si_cxix;
		540	}
		541
		542	PUTBACK;
		543	}
		544
		545	/* allocate some space on the context stack for our purposes */
		546	/* we manually unroll here, as usually 2 slots is enough */
		547	if (SLOT_COUNT >= 1) CXINC;
		548	if (SLOT_COUNT >= 2) CXINC;
		549	if (SLOT_COUNT >= 3) CXINC;
		550	{
		551	int i;
		552	for (i = 3; i < SLOT_COUNT; ++i)
		553	CXINC;
		554	}
		555	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		556
		557	c->mainstack = PL_mainstack;
		558
		559	{
		560	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		561
		562	slot->defav = GvAV (PL_defgv);
		563	slot->defsv = DEFSV;
		564	slot->errsv = ERRSV;
		565	slot->irsgv = GvSV (irsgv);
		566
		567	#define VAR(name,type) slot->name = PL_ ## name;
		568	# include "state.h"
		569	#undef VAR
		570	}
		571	}
		572
		573	/*
		574	* allocate various perl stacks. This is an exact copy
		575	* of perl.c:init_stacks, except that it uses less memory
		576	* on the (sometimes correct) assumption that coroutines do
		577	* not usually need a lot of stackspace.
		578	*/
		579	#if CORO_PREFER_PERL_FUNCTIONS
		580	# define coro_init_stacks init_stacks
		581	#else
		582	static void
		583	coro_init_stacks (pTHX)
		584	{
		585	PL_curstackinfo = new_stackinfo(32, 8);
		586	PL_curstackinfo->si_type = PERLSI_MAIN;
		587	PL_curstack = PL_curstackinfo->si_stack;
		588	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		589
		590	PL_stack_base = AvARRAY(PL_curstack);
		591	PL_stack_sp = PL_stack_base;
		592	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		593
		594	New(50,PL_tmps_stack,32,SV*);
		595	PL_tmps_floor = -1;
		596	PL_tmps_ix = -1;
		597	PL_tmps_max = 32;
		598
		599	New(54,PL_markstack,16,I32);
		600	PL_markstack_ptr = PL_markstack;
		601	PL_markstack_max = PL_markstack + 16;
		602
		603	#ifdef SET_MARK_OFFSET
		604	SET_MARK_OFFSET;
		605	#endif
		606
		607	New(54,PL_scopestack,8,I32);
		608	PL_scopestack_ix = 0;
		609	PL_scopestack_max = 8;
		610
		611	New(54,PL_savestack,24,ANY);
		612	PL_savestack_ix = 0;
		613	PL_savestack_max = 24;
		614
		615	#if !PERL_VERSION_ATLEAST (5,10,0)
		616	New(54,PL_retstack,4,OP*);
		617	PL_retstack_ix = 0;
		618	PL_retstack_max = 4;
		619	#endif
		620	}
		621	#endif
		622
		623	/*
		624	* destroy the stacks, the callchain etc...
		625	*/
		626	static void
		627	coro_destroy_stacks (pTHX)
		628	{
		629	while (PL_curstackinfo->si_next)
		630	PL_curstackinfo = PL_curstackinfo->si_next;
		631
		632	while (PL_curstackinfo)
		633	{
		634	PERL_SI *p = PL_curstackinfo->si_prev;
		635
		636	if (!IN_DESTRUCT)
		637	SvREFCNT_dec (PL_curstackinfo->si_stack);
		638
		639	Safefree (PL_curstackinfo->si_cxstack);
		640	Safefree (PL_curstackinfo);
		641	PL_curstackinfo = p;
		642	}
		643
		644	Safefree (PL_tmps_stack);
		645	Safefree (PL_markstack);
		646	Safefree (PL_scopestack);
		647	Safefree (PL_savestack);
		648	#if !PERL_VERSION_ATLEAST (5,10,0)
		649	Safefree (PL_retstack);
		650	#endif
		651	}
		652
		653	static size_t
		654	coro_rss (pTHX_ struct coro *coro)
		655	{
		656	size_t rss = sizeof (*coro);
		657
		658	if (coro->mainstack)
		659	{
		660	perl_slots tmp_slot;
		661	perl_slots *slot;
		662
		663	if (coro->flags & CF_RUNNING)
		664	{
		665	slot = &tmp_slot;
		666
		667	#define VAR(name,type) slot->name = PL_ ## name;
		668	# include "state.h"
		669	#undef VAR
		670	}
		671	else
		672	slot = coro->slot;
		673
		674	if (slot)
		675	{
		676	rss += sizeof (slot->curstackinfo);
		677	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		678	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		679	rss += slot->tmps_max * sizeof (SV *);
		680	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		681	rss += slot->scopestack_max * sizeof (I32);
		682	rss += slot->savestack_max * sizeof (ANY);
		683
		684	#if !PERL_VERSION_ATLEAST (5,10,0)
		685	rss += slot->retstack_max * sizeof (OP *);
		686	#endif
		687	}
		688	}
		689
		690	return rss;
		691	}
		692
		693	/ coroutine stack handling **********************************************/
		694
		695	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
		696	static int (orig_sigelem_set) (pTHX_ SV sv, MAGIC *mg);
		697	static int (orig_sigelem_clr) (pTHX_ SV sv, MAGIC *mg);
		698
		699	/* apparently < 5.8.8 */
		700	#ifndef MgPV_nolen_const
		701	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		702	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
		703	(const char*)(mg)->mg_ptr)
		704	#endif
		705
		706	/*
		707	* This overrides the default magic get method of %SIG elements.
		708	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		709	* and instead of tryign to save and restore the hash elements, we just provide
		710	* readback here.
		711	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		712	* not expecting this to actually change the hook. This is a potential problem
		713	* when a schedule happens then, but we ignore this.
		714	*/
		715	static int
		716	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		717	{
		718	const char *s = MgPV_nolen_const (mg);
		719
		720	if (*s == '_')
		721	{
		722	SV **svp = 0;
		723
		724	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		725	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		726
		727	if (svp)
		728	{
		729	sv_setsv (sv, svp ? svp : &PL_sv_undef);
		730	return 0;
		731	}
		732	}
		733
		734	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		735	}
		736
		737	static int
		738	coro_sigelem_clr (pTHX_ SV sv, MAGIC mg)
		739	{
		740	const char *s = MgPV_nolen_const (mg);
		741
		742	if (*s == '_')
		743	{
		744	SV **svp = 0;
		745
		746	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		747	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		748
		749	if (svp)
		750	{
		751	SV old = svp;
		752	*svp = 0;
		753	SvREFCNT_dec (old);
		754	return 0;
		755	}
		756	}
		757
		758	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		759	}
		760
		761	static int
		762	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		763	{
		764	const char *s = MgPV_nolen_const (mg);
		765
		766	if (*s == '_')
		767	{
		768	SV **svp = 0;
		769
		770	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		771	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		772
		773	if (svp)
		774	{
		775	SV old = svp;
		776	*svp = newSVsv (sv);
		777	SvREFCNT_dec (old);
		778	return 0;
		779	}
		780	}
		781
		782	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		783	}
		784
		785	static void
		786	coro_setup (pTHX_ struct coro *coro)
		787	{
		788	/*
		789	* emulate part of the perl startup here.
		790	*/
		791	coro_init_stacks (aTHX);
		792
		793	PL_runops = RUNOPS_DEFAULT;
		794	PL_curcop = &PL_compiling;
		795	PL_in_eval = EVAL_NULL;
		796	PL_comppad = 0;
		797	PL_curpm = 0;
		798	PL_curpad = 0;
		799	PL_localizing = 0;
		800	PL_dirty = 0;
		801	PL_restartop = 0;
		802	#if PERL_VERSION_ATLEAST (5,10,0)
		803	PL_parser = 0;
		804	#endif
		805
		806	/* recreate the die/warn hooks */
		807	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		808	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		809
		810	GvSV (PL_defgv) = newSV (0);
		811	GvAV (PL_defgv) = coro->args; coro->args = 0;
		812	GvSV (PL_errgv) = newSV (0);
		813	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		814	PL_rs = newSVsv (GvSV (irsgv));
		815	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		816
		817	{
		818	dSP;
		819	LOGOP myop;
		820
		821	Zero (&myop, 1, LOGOP);
		822	myop.op_next = Nullop;
		823	myop.op_flags = OPf_WANT_VOID;
		824
		825	PUSHMARK (SP);
		826	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		827	PUTBACK;
		828	PL_op = (OP *)&myop;
		829	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		830	SPAGAIN;
		831	}
		832
		833	/* this newly created coroutine might be run on an existing cctx which most
		834	* likely was suspended in set_stacklevel, called from entersub.
		835	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		836	* so we ENTER here for symmetry
		837	*/
		838	ENTER;
		839	}
		840
		841	static void
		842	coro_destroy (pTHX_ struct coro *coro)
		843	{
		844	if (!IN_DESTRUCT)
		845	{
		846	/* restore all saved variables and stuff */
		847	LEAVE_SCOPE (0);
		848	assert (PL_tmps_floor == -1);
		849
		850	/* free all temporaries */
		851	FREETMPS;
		852	assert (PL_tmps_ix == -1);
		853
		854	/* unwind all extra stacks */
		855	POPSTACK_TO (PL_mainstack);
		856
		857	/* unwind main stack */
		858	dounwind (-1);
		859	}
		860
		861	SvREFCNT_dec (GvSV (PL_defgv));
		862	SvREFCNT_dec (GvAV (PL_defgv));
		863	SvREFCNT_dec (GvSV (PL_errgv));
		864	SvREFCNT_dec (PL_defoutgv);
		865	SvREFCNT_dec (PL_rs);
		866	SvREFCNT_dec (GvSV (irsgv));
		867
		868	SvREFCNT_dec (PL_diehook);
		869	SvREFCNT_dec (PL_warnhook);
		870
		871	SvREFCNT_dec (coro->saved_deffh);
		872	SvREFCNT_dec (coro->throw);
		873
		874	coro_destroy_stacks (aTHX);
		875	}
		876
		877	static void
		878	free_coro_mortal (pTHX)
		879	{
		880	if (expect_true (coro_mortal))
		881	{
		882	SvREFCNT_dec (coro_mortal);
		883	coro_mortal = 0;
		884	}
		885	}
		886
		887	static int
		888	runops_trace (pTHX)
		889	{
		890	COP *oldcop = 0;
		891	int oldcxix = -2;
		892	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		893	coro_cctx *cctx = coro->cctx;
		894
		895	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		896	{
		897	PERL_ASYNC_CHECK ();
		898
		899	if (cctx->flags & CC_TRACE_ALL)
		900	{
		901	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		902	{
		903	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		904	SV bot, top;
		905	AV av = newAV (); / return values */
		906	SV **cb;
		907	dSP;
		908
		909	GV *gv = CvGV (cx->blk_sub.cv);
		910	SV *fullname = sv_2mortal (newSV (0));
		911	if (isGV (gv))
		912	gv_efullname3 (fullname, gv, 0);
		913
		914	bot = PL_stack_base + cx->blk_oldsp + 1;
		915	top = cx->blk_gimme == G_ARRAY ? SP + 1
		916	: cx->blk_gimme == G_SCALAR ? bot + 1
		917	: bot;
		918
		919	av_extend (av, top - bot);
		920	while (bot < top)
		921	av_push (av, SvREFCNT_inc (*bot++));
		922
		923	PL_runops = RUNOPS_DEFAULT;
		924	ENTER;
		925	SAVETMPS;
		926	EXTEND (SP, 3);
		927	PUSHMARK (SP);
		928	PUSHs (&PL_sv_no);
		929	PUSHs (fullname);
		930	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		931	PUTBACK;
		932	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		933	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		934	SPAGAIN;
		935	FREETMPS;
		936	LEAVE;
		937	PL_runops = runops_trace;
		938	}
		939
		940	if (oldcop != PL_curcop)
		941	{
		942	oldcop = PL_curcop;
		943
		944	if (PL_curcop != &PL_compiling)
		945	{
		946	SV **cb;
		947
		948	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		949	{
		950	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		951
		952	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		953	{
		954	runops_proc_t old_runops = PL_runops;
		955	dSP;
		956	GV *gv = CvGV (cx->blk_sub.cv);
		957	SV *fullname = sv_2mortal (newSV (0));
		958
		959	if (isGV (gv))
		960	gv_efullname3 (fullname, gv, 0);
		961
		962	PL_runops = RUNOPS_DEFAULT;
		963	ENTER;
		964	SAVETMPS;
		965	EXTEND (SP, 3);
		966	PUSHMARK (SP);
		967	PUSHs (&PL_sv_yes);
		968	PUSHs (fullname);
		969	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		970	PUTBACK;
		971	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		972	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		973	SPAGAIN;
		974	FREETMPS;
		975	LEAVE;
		976	PL_runops = runops_trace;
		977	}
		978
		979	oldcxix = cxstack_ix;
		980	}
		981
		982	if (cctx->flags & CC_TRACE_LINE)
		983	{
		984	dSP;
		985
		986	PL_runops = RUNOPS_DEFAULT;
		987	ENTER;
		988	SAVETMPS;
		989	EXTEND (SP, 3);
		990	PL_runops = RUNOPS_DEFAULT;
		991	PUSHMARK (SP);
		992	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		993	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		994	PUTBACK;
		995	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		996	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		997	SPAGAIN;
		998	FREETMPS;
		999	LEAVE;
		1000	PL_runops = runops_trace;
		1001	}
		1002	}
		1003	}
		1004	}
		1005	}
		1006
		1007	TAINT_NOT;
		1008	return 0;
		1009	}
		1010
		1011	/* inject a fake call to Coro::State::_cctx_init into the execution */
		1012	/* _cctx_init should be careful, as it could be called at almost any time */
		1013	/* during execution of a perl program */
		1014	static void NOINLINE
		1015	cctx_prepare (pTHX_ coro_cctx *cctx)
		1016	{
		1017	dSP;
		1018	LOGOP myop;
		1019
		1020	PL_top_env = &PL_start_env;
		1021
		1022	if (cctx->flags & CC_TRACE)
		1023	PL_runops = runops_trace;
		1024
		1025	Zero (&myop, 1, LOGOP);
		1026	myop.op_next = PL_op;
		1027	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		1028
		1029	PUSHMARK (SP);
		1030	EXTEND (SP, 2);
		1031	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		1032	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		1033	PUTBACK;
		1034	PL_op = (OP *)&myop;
		1035	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		1036	SPAGAIN;
		1037	}
		1038
		1039	/*
		1040	* this is a _very_ stripped down perl interpreter ;)
		1041	*/
		1042	static void
		1043	cctx_run (void *arg)
		1044	{
		1045	dTHX;
		1046
		1047	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		1048	UNLOCK;
		1049
		1050	/* we now skip the entersub that lead to transfer() */
		1051	PL_op = PL_op->op_next;
		1052
		1053	/* inject a fake subroutine call to cctx_init */
		1054	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1055
		1056	/* somebody or something will hit me for both perl_run and PL_restartop */
		1057	PL_restartop = PL_op;
		1058	perl_run (PL_curinterp);
		1059
		1060	/*
		1061	* If perl-run returns we assume exit() was being called or the coro
		1062	* fell off the end, which seems to be the only valid (non-bug)
		1063	* reason for perl_run to return. We try to exit by jumping to the
		1064	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1065	* coroutine as Coro has no such concept
		1066	*/
		1067	PL_top_env = main_top_env;
		1068	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1069	}
		1070
		1071	static coro_cctx *
		1072	cctx_new ()
		1073	{
		1074	coro_cctx *cctx;
		1075	void *stack_start;
		1076	size_t stack_size;
		1077
		1078	++cctx_count;
		1079
		1080	Newz (0, cctx, 1, coro_cctx);
		1081
		1082	#if HAVE_MMAP
		1083	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1084	/* mmap supposedly does allocate-on-write for us */
		1085	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		1086
		1087	if (cctx->sptr != (void *)-1)
		1088	{
		1089	# if CORO_STACKGUARD
		1090	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1091	# endif
		1092	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1093	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1094	cctx->flags \|= CC_MAPPED;
		1095	}
		1096	else
		1097	#endif
		1098	{
		1099	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1100	New (0, cctx->sptr, coro_stacksize, long);
		1101
		1102	if (!cctx->sptr)
		1103	{
		1104	perror ("FATAL: unable to allocate stack for coroutine");
		1105	_exit (EXIT_FAILURE);
		1106	}
		1107
		1108	stack_start = cctx->sptr;
		1109	stack_size = cctx->ssize;
		1110	}
		1111
		1112	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		1113	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1114
		1115	return cctx;
		1116	}
		1117
		1118	static void
		1119	cctx_destroy (coro_cctx *cctx)
		1120	{
		1121	if (!cctx)
		1122	return;
		1123
		1124	--cctx_count;
		1125
		1126	#if CORO_USE_VALGRIND
		1127	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1128	#endif
		1129
		1130	#if HAVE_MMAP
		1131	if (cctx->flags & CC_MAPPED)
		1132	munmap (cctx->sptr, cctx->ssize);
		1133	else
		1134	#endif
		1135	Safefree (cctx->sptr);
		1136
		1137	Safefree (cctx);
		1138	}
		1139
		1140	/* wether this cctx should be destructed */
		1141	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1142
		1143	static coro_cctx *
		1144	cctx_get (pTHX)
		1145	{
		1146	while (expect_true (cctx_first))
		1147	{
		1148	coro_cctx *cctx = cctx_first;
		1149	cctx_first = cctx->next;
		1150	--cctx_idle;
		1151
		1152	if (expect_true (!CCTX_EXPIRED (cctx)))
		1153	return cctx;
		1154
		1155	cctx_destroy (cctx);
		1156	}
		1157
		1158	return cctx_new ();
		1159	}
		1160
		1161	static void
		1162	cctx_put (coro_cctx *cctx)
		1163	{
		1164	/* free another cctx if overlimit */
		1165	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1166	{
		1167	coro_cctx *first = cctx_first;
		1168	cctx_first = first->next;
		1169	--cctx_idle;
		1170
		1171	cctx_destroy (first);
		1172	}
		1173
		1174	++cctx_idle;
		1175	cctx->next = cctx_first;
		1176	cctx_first = cctx;
		1177	}
		1178
		1179	/ coroutine switching ***************************************************/
		1180
		1181	static void
		1182	transfer_check (pTHX_ struct coro prev, struct coro next)
		1183	{
		1184	if (expect_true (prev != next))
		1185	{
		1186	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1187	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1188
		1189	if (expect_false (next->flags & CF_RUNNING))
		1190	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1191
		1192	if (expect_false (next->flags & CF_DESTROYED))
		1193	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1194
		1195	#if !PERL_VERSION_ATLEAST (5,10,0)
		1196	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1197	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1198	#endif
		1199	}
		1200	}
		1201
		1202	/* always use the TRANSFER macro */
		1203	static void NOINLINE
		1204	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
		1205	{
		1206	dSTACKLEVEL;
		1207	static volatile int has_throw;
		1208
		1209	/* sometimes transfer is only called to set idle_sp */
		1210	if (expect_false (!next))
		1211	{
		1212	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1213	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1214	}
		1215	else if (expect_true (prev != next))
		1216	{
		1217	coro_cctx *prev__cctx;
		1218
		1219	if (expect_false (prev->flags & CF_NEW))
		1220	{
		1221	/* create a new empty context */
		1222	Newz (0, prev->cctx, 1, coro_cctx);
		1223	prev->flags &= ~CF_NEW;
		1224	prev->flags \|= CF_RUNNING;
		1225	}
		1226
		1227	prev->flags &= ~CF_RUNNING;
		1228	next->flags \|= CF_RUNNING;
		1229
		1230	LOCK;
		1231
		1232	/* first get rid of the old state */
		1233	save_perl (aTHX_ prev);
		1234
		1235	if (expect_false (next->flags & CF_NEW))
		1236	{
		1237	/* need to start coroutine */
		1238	next->flags &= ~CF_NEW;
		1239	/* setup coroutine call */
		1240	coro_setup (aTHX_ next);
		1241	}
		1242	else
		1243	load_perl (aTHX_ next);
		1244
		1245	prev__cctx = prev->cctx;
		1246
		1247	/* possibly "free" the cctx */
		1248	if (expect_true (
		1249	prev__cctx->idle_sp == STACKLEVEL
		1250	&& !(prev__cctx->flags & CC_TRACE)
		1251	&& !force_cctx
		1252	))
		1253	{
		1254	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1255	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1256
		1257	prev->cctx = 0;
		1258
		1259	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1260	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1261	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1262	if (!next->cctx)
		1263	next->cctx = cctx_get (aTHX);
		1264
		1265	cctx_put (prev__cctx);
		1266	}
		1267
		1268	++next->usecount;
		1269
		1270	if (expect_true (!next->cctx))
		1271	next->cctx = cctx_get (aTHX);
		1272
		1273	has_throw = !!next->throw;
		1274
		1275	if (expect_false (prev__cctx != next->cctx))
		1276	{
		1277	prev__cctx->top_env = PL_top_env;
		1278	PL_top_env = next->cctx->top_env;
		1279	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1280	}
		1281
		1282	free_coro_mortal (aTHX);
		1283	UNLOCK;
		1284
		1285	if (expect_false (has_throw))
		1286	{
		1287	struct coro *coro = SvSTATE (coro_current);
		1288
		1289	if (coro->throw)
		1290	{
		1291	SV *exception = coro->throw;
		1292	coro->throw = 0;
		1293	sv_setsv (ERRSV, exception);
		1294	croak (0);
		1295	}
		1296	}
		1297	}
		1298	}
		1299
		1300	struct transfer_args
		1301	{
		1302	struct coro prev, next;
		1303	};
		1304
		1305	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1306	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1307
		1308	/ high level stuff ******************************************************/
		1309
		1310	static int
		1311	coro_state_destroy (pTHX_ struct coro *coro)
		1312	{
		1313	if (coro->flags & CF_DESTROYED)
		1314	return 0;
		1315
		1316	coro->flags \|= CF_DESTROYED;
		1317
		1318	if (coro->flags & CF_READY)
		1319	{
		1320	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1321	/* alternative: look through all ready queues and remove the coro */
		1322	LOCK;
		1323	--coro_nready;
		1324	UNLOCK;
		1325	}
		1326	else
		1327	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1328
		1329	if (coro->mainstack && coro->mainstack != main_mainstack)
		1330	{
		1331	struct coro temp;
		1332
		1333	if (coro->flags & CF_RUNNING)
		1334	croak ("FATAL: tried to destroy currently running coroutine");
		1335
		1336	save_perl (aTHX_ &temp);
		1337	load_perl (aTHX_ coro);
		1338
		1339	coro_destroy (aTHX_ coro);
		1340
		1341	load_perl (aTHX_ &temp);
		1342
		1343	coro->slot = 0;
		1344	}
		1345
		1346	cctx_destroy (coro->cctx);
		1347	SvREFCNT_dec (coro->args);
		1348
		1349	if (coro->next) coro->next->prev = coro->prev;
		1350	if (coro->prev) coro->prev->next = coro->next;
		1351	if (coro == coro_first) coro_first = coro->next;
		1352
		1353	return 1;
		1354	}
		1355
		1356	static int
		1357	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1358	{
		1359	struct coro coro = (struct coro )mg->mg_ptr;
		1360	mg->mg_ptr = 0;
		1361
		1362	coro->hv = 0;
		1363
		1364	if (--coro->refcnt < 0)
		1365	{
		1366	coro_state_destroy (aTHX_ coro);
		1367	Safefree (coro);
		1368	}
		1369
		1370	return 0;
		1371	}
		1372
		1373	static int
		1374	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1375	{
		1376	struct coro coro = (struct coro )mg->mg_ptr;
		1377
		1378	++coro->refcnt;
		1379
		1380	return 0;
		1381	}
		1382
		1383	static MGVTBL coro_state_vtbl = {
		1384	0, 0, 0, 0,
		1385	coro_state_free,
		1386	0,
		1387	#ifdef MGf_DUP
		1388	coro_state_dup,
		1389	#else
		1390	# define MGf_DUP 0
		1391	#endif
		1392	};
		1393
		1394	static void
		1395	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1396	{
		1397	ta->prev = SvSTATE (prev_sv);
		1398	ta->next = SvSTATE (next_sv);
		1399	TRANSFER_CHECK (*ta);
		1400	}
		1401
		1402	static void
		1403	api_transfer (SV prev_sv, SV next_sv)
		1404	{
		1405	dTHX;
		1406	struct transfer_args ta;
		1407
		1408	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1409	TRANSFER (ta, 1);
		1410	}
		1411
		1412	/ Coro ******************************************************************/
		1413
		1414	static void
		1415	coro_enq (pTHX_ SV *coro_sv)
		1416	{
		1417	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1418	}
		1419
		1420	static SV *
		1421	coro_deq (pTHX)
		1422	{
		1423	int prio;
		1424
		1425	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1426	if (AvFILLp (coro_ready [prio]) >= 0)
		1427	return av_shift (coro_ready [prio]);
		1428
		1429	return 0;
		1430	}
		1431
		1432	static int
		1433	api_ready (SV *coro_sv)
		1434	{
		1435	dTHX;
		1436	struct coro *coro;
		1437	SV *sv_hook;
		1438	void (*xs_hook)(void);
		1439
		1440	if (SvROK (coro_sv))
		1441	coro_sv = SvRV (coro_sv);
		1442
		1443	coro = SvSTATE (coro_sv);
		1444
		1445	if (coro->flags & CF_READY)
		1446	return 0;
		1447
		1448	coro->flags \|= CF_READY;
		1449
		1450	LOCK;
		1451
		1452	sv_hook = coro_nready ? 0 : coro_readyhook;
		1453	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1454
		1455	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1456	++coro_nready;
		1457
		1458	UNLOCK;
		1459
		1460	if (sv_hook)
		1461	{
		1462	dSP;
		1463
		1464	ENTER;
		1465	SAVETMPS;
		1466
		1467	PUSHMARK (SP);
		1468	PUTBACK;
		1469	call_sv (sv_hook, G_DISCARD);
		1470	SPAGAIN;
		1471
		1472	FREETMPS;
		1473	LEAVE;
		1474	}
		1475
		1476	if (xs_hook)
		1477	xs_hook ();
		1478
		1479	return 1;
		1480	}
		1481
		1482	static int
		1483	api_is_ready (SV *coro_sv)
		1484	{
		1485	dTHX;
		1486	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1487	}
		1488
		1489	static void
		1490	prepare_schedule (pTHX_ struct transfer_args *ta)
		1491	{
		1492	SV prev_sv, next_sv;
		1493
		1494	for (;;)
		1495	{
		1496	LOCK;
		1497	next_sv = coro_deq (aTHX);
		1498
		1499	/* nothing to schedule: call the idle handler */
		1500	if (expect_false (!next_sv))
		1501	{
		1502	dSP;
		1503	UNLOCK;
		1504
		1505	ENTER;
		1506	SAVETMPS;
		1507
		1508	PUSHMARK (SP);
		1509	PUTBACK;
		1510	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1511	SPAGAIN;
		1512
		1513	FREETMPS;
		1514	LEAVE;
		1515	continue;
		1516	}
		1517
		1518	ta->next = SvSTATE (next_sv);
		1519
		1520	/* cannot transfer to destroyed coros, skip and look for next */
		1521	if (expect_false (ta->next->flags & CF_DESTROYED))
		1522	{
		1523	UNLOCK;
		1524	SvREFCNT_dec (next_sv);
		1525	/* coro_nready is already taken care of by destroy */
		1526	continue;
		1527	}
		1528
		1529	--coro_nready;
		1530	UNLOCK;
		1531	break;
		1532	}
		1533
		1534	/* free this only after the transfer */
		1535	prev_sv = SvRV (coro_current);
		1536	ta->prev = SvSTATE (prev_sv);
		1537	TRANSFER_CHECK (*ta);
		1538	assert (ta->next->flags & CF_READY);
		1539	ta->next->flags &= ~CF_READY;
		1540	SvRV_set (coro_current, next_sv);
		1541
		1542	LOCK;
		1543	free_coro_mortal (aTHX);
		1544	coro_mortal = prev_sv;
		1545	UNLOCK;
		1546	}
		1547
		1548	static void
		1549	prepare_cede (pTHX_ struct transfer_args *ta)
		1550	{
		1551	api_ready (coro_current);
		1552	prepare_schedule (aTHX_ ta);
		1553	}
		1554
		1555	static int
		1556	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1557	{
		1558	if (coro_nready)
		1559	{
		1560	SV *prev = SvRV (coro_current);
		1561	prepare_schedule (aTHX_ ta);
		1562	api_ready (prev);
		1563	return 1;
		1564	}
		1565	else
		1566	return 0;
		1567	}
		1568
		1569	static void
		1570	api_schedule (void)
		1571	{
		1572	dTHX;
		1573	struct transfer_args ta;
		1574
		1575	prepare_schedule (aTHX_ &ta);
		1576	TRANSFER (ta, 1);
		1577	}
		1578
		1579	static int
		1580	api_cede (void)
		1581	{
		1582	dTHX;
		1583	struct transfer_args ta;
		1584
		1585	prepare_cede (aTHX_ &ta);
		1586
		1587	if (expect_true (ta.prev != ta.next))
		1588	{
		1589	TRANSFER (ta, 1);
		1590	return 1;
		1591	}
		1592	else
		1593	return 0;
		1594	}
		1595
		1596	static int
		1597	api_cede_notself (void)
		1598	{
		1599	dTHX;
		1600	struct transfer_args ta;
		1601
		1602	if (prepare_cede_notself (aTHX_ &ta))
		1603	{
		1604	TRANSFER (ta, 1);
		1605	return 1;
		1606	}
		1607	else
		1608	return 0;
		1609	}
		1610
		1611	static void
		1612	api_trace (SV *coro_sv, int flags)
		1613	{
		1614	dTHX;
		1615	struct coro *coro = SvSTATE (coro_sv);
		1616
		1617	if (flags & CC_TRACE)
		1618	{
		1619	if (!coro->cctx)
		1620	coro->cctx = cctx_new ();
		1621	else if (!(coro->cctx->flags & CC_TRACE))
		1622	croak ("cannot enable tracing on coroutine with custom stack");
		1623
		1624	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1625	}
		1626	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1627	{
		1628	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1629
		1630	if (coro->flags & CF_RUNNING)
		1631	PL_runops = RUNOPS_DEFAULT;
		1632	else
		1633	coro->slot->runops = RUNOPS_DEFAULT;
		1634	}
		1635	}
		1636
		1637	static int
		1638	coro_gensub_free (pTHX_ SV sv, MAGIC mg)
		1639	{
		1640	AV *padlist;
		1641	AV av = (AV )mg->mg_obj;
		1642
		1643	abort ();
		1644
		1645	return 0;
		1646	}
		1647
		1648	static MGVTBL coro_gensub_vtbl = {
		1649	0, 0, 0, 0,
		1650	coro_gensub_free
		1651	};
		1652
		1653	/*****************************************************************************/
		1654	/* PerlIO::cede */
		1655
		1656	typedef struct
		1657	{
		1658	PerlIOBuf base;
		1659	NV next, every;
		1660	} PerlIOCede;
		1661
		1662	static IV
		1663	PerlIOCede_pushed (pTHX_ PerlIO f, const char mode, SV arg, PerlIO_funcs tab)
		1664	{
		1665	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1666
		1667	self->every = SvNV (arg);
		1668	self->next = nvtime () + self->every;
		1669
		1670	return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
		1671	}
		1672
		1673	static SV *
		1674	PerlIOCede_getarg (pTHX_ PerlIO f, CLONE_PARAMS param, int flags)
		1675	{
		1676	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1677
		1678	return newSVnv (self->every);
		1679	}
		1680
		1681	static IV
		1682	PerlIOCede_flush (pTHX_ PerlIO *f)
		1683	{
		1684	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1685	double now = nvtime ();
		1686
		1687	if (now >= self->next)
		1688	{
		1689	api_cede ();
		1690	self->next = now + self->every;
		1691	}
		1692
		1693	return PerlIOBuf_flush (f);
		1694	}
		1695
		1696	static PerlIO_funcs PerlIO_cede =
		1697	{
		1698	sizeof(PerlIO_funcs),
		1699	"cede",
		1700	sizeof(PerlIOCede),
		1701	PERLIO_K_DESTRUCT \| PERLIO_K_RAW,
		1702	PerlIOCede_pushed,
		1703	PerlIOBuf_popped,
		1704	PerlIOBuf_open,
		1705	PerlIOBase_binmode,
		1706	PerlIOCede_getarg,
		1707	PerlIOBase_fileno,
		1708	PerlIOBuf_dup,
		1709	PerlIOBuf_read,
		1710	PerlIOBuf_unread,
		1711	PerlIOBuf_write,
		1712	PerlIOBuf_seek,
		1713	PerlIOBuf_tell,
		1714	PerlIOBuf_close,
		1715	PerlIOCede_flush,
		1716	PerlIOBuf_fill,
		1717	PerlIOBase_eof,
		1718	PerlIOBase_error,
		1719	PerlIOBase_clearerr,
		1720	PerlIOBase_setlinebuf,
		1721	PerlIOBuf_get_base,
		1722	PerlIOBuf_bufsiz,
		1723	PerlIOBuf_get_ptr,
		1724	PerlIOBuf_get_cnt,
		1725	PerlIOBuf_set_ptrcnt,
		1726	};
		1727
		1728
		1729	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
		1730
		1731	PROTOTYPES: DISABLE
		1732
		1733	BOOT:
		1734	{
		1735	#ifdef USE_ITHREADS
		1736	MUTEX_INIT (&coro_mutex);
		1737	#endif
		1738	BOOT_PAGESIZE;
		1739
		1740	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1741	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1742
		1743	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1744	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1745	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1746
		1747	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1748	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1749	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1750
		1751	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
		1752
		1753	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1754	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1755	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1756	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1757
		1758	main_mainstack = PL_mainstack;
		1759	main_top_env = PL_top_env;
		1760
		1761	while (main_top_env->je_prev)
		1762	main_top_env = main_top_env->je_prev;
		1763
		1764	coroapi.ver = CORO_API_VERSION;
		1765	coroapi.rev = CORO_API_REVISION;
		1766	coroapi.transfer = api_transfer;
		1767
		1768	{
		1769	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
		1770
		1771	if (!svp) croak ("Time::HiRes is required");
		1772	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
		1773
		1774	nvtime = INT2PTR (double ()(), SvIV (svp));
		1775	}
		1776
		1777	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1778	}
		1779
		1780	SV *
		1781	new (char *klass, ...)
		1782	CODE:
		1783	{
		1784	struct coro *coro;
		1785	MAGIC *mg;
		1786	HV *hv;
		1787	int i;
		1788
		1789	Newz (0, coro, 1, struct coro);
		1790	coro->args = newAV ();
		1791	coro->flags = CF_NEW;
		1792
		1793	if (coro_first) coro_first->prev = coro;
		1794	coro->next = coro_first;
		1795	coro_first = coro;
		1796
		1797	coro->hv = hv = newHV ();
		1798	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1799	mg->mg_flags \|= MGf_DUP;
		1800	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1801
		1802	av_extend (coro->args, items - 1);
		1803	for (i = 1; i < items; i++)
		1804	av_push (coro->args, newSVsv (ST (i)));
		1805	}
		1806	OUTPUT:
		1807	RETVAL
		1808
		1809	# these not obviously related functions are all rolled into the same xs
		1810	# function to increase chances that they all will call transfer with the same
		1811	# stack offset
		1812	void
		1813	_set_stacklevel (...)
		1814	ALIAS:
		1815	Coro::State::transfer = 1
		1816	Coro::schedule = 2
		1817	Coro::cede = 3
		1818	Coro::cede_notself = 4
		1819	CODE:
		1820	{
		1821	struct transfer_args ta;
		1822
		1823	PUTBACK;
		1824	switch (ix)
		1825	{
		1826	case 0:
		1827	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1828	ta.next = 0;
		1829	break;
		1830
		1831	case 1:
		1832	if (items != 2)
		1833	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1834
		1835	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1836	break;
		1837
		1838	case 2:
		1839	prepare_schedule (aTHX_ &ta);
		1840	break;
		1841
		1842	case 3:
		1843	prepare_cede (aTHX_ &ta);
		1844	break;
		1845
		1846	case 4:
		1847	if (!prepare_cede_notself (aTHX_ &ta))
		1848	XSRETURN_EMPTY;
		1849
		1850	break;
		1851	}
		1852	SPAGAIN;
		1853
		1854	BARRIER;
		1855	PUTBACK;
		1856	TRANSFER (ta, 0);
		1857	SPAGAIN; /* might be the sp of a different coroutine now */
		1858	/* be extra careful not to ever do anything after TRANSFER */
		1859	}
		1860
		1861	bool
		1862	_destroy (SV *coro_sv)
		1863	CODE:
		1864	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1865	OUTPUT:
		1866	RETVAL
		1867
		1868	void
		1869	_exit (int code)
		1870	PROTOTYPE: $
		1871	CODE:
		1872	_exit (code);
		1873
		1874	int
		1875	cctx_stacksize (int new_stacksize = 0)
		1876	CODE:
		1877	RETVAL = coro_stacksize;
		1878	if (new_stacksize)
		1879	coro_stacksize = new_stacksize;
		1880	OUTPUT:
		1881	RETVAL
		1882
		1883	int
		1884	cctx_count ()
		1885	CODE:
		1886	RETVAL = cctx_count;
		1887	OUTPUT:
		1888	RETVAL
		1889
		1890	int
		1891	cctx_idle ()
		1892	CODE:
		1893	RETVAL = cctx_idle;
		1894	OUTPUT:
		1895	RETVAL
		1896
		1897	void
		1898	list ()
		1899	PPCODE:
		1900	{
		1901	struct coro *coro;
		1902	for (coro = coro_first; coro; coro = coro->next)
		1903	if (coro->hv)
		1904	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1905	}
		1906
		1907	void
		1908	call (Coro::State coro, SV *coderef)
		1909	ALIAS:
		1910	eval = 1
		1911	CODE:
		1912	{
		1913	if (coro->mainstack && ((coro->flags & CF_RUNNING) \|\| coro->slot))
		1914	{
		1915	struct coro temp;
		1916
		1917	if (!(coro->flags & CF_RUNNING))
347	{	1918	{
348	/* I never used formats, so how should I know how these are implemented? */	1919	PUTBACK;
349	/* my bold guess is as a simple, plain sub... */	1920	save_perl (aTHX_ &temp);
350	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	1921	load_perl (aTHX_ coro);
		1922	}
		1923
		1924	{
		1925	dSP;
		1926	ENTER;
		1927	SAVETMPS;
		1928	PUTBACK;
		1929	PUSHSTACK;
		1930	PUSHMARK (SP);
		1931
		1932	if (ix)
		1933	eval_sv (coderef, 0);
		1934	else
		1935	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1936
		1937	POPSTACK;
		1938	SPAGAIN;
		1939	FREETMPS;
		1940	LEAVE;
		1941	PUTBACK;
		1942	}
		1943
		1944	if (!(coro->flags & CF_RUNNING))
		1945	{
		1946	save_perl (aTHX_ coro);
		1947	load_perl (aTHX_ &temp);
		1948	SPAGAIN;
351	}	1949	}
352	}	1950	}
353	while (cxix >= 0);	1951	}
354		1952
355	if (top_si->si_type == PERLSI_MAIN)	1953	SV *
356	break;	1954	is_ready (Coro::State coro)
		1955	PROTOTYPE: $
		1956	ALIAS:
		1957	is_ready = CF_READY
		1958	is_running = CF_RUNNING
		1959	is_new = CF_NEW
		1960	is_destroyed = CF_DESTROYED
		1961	CODE:
		1962	RETVAL = boolSV (coro->flags & ix);
		1963	OUTPUT:
		1964	RETVAL
357		1965
358	top_si = top_si->si_prev;	1966	void
359	ccstk = top_si->si_cxstack;	1967	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
360	cxix = top_si->si_cxix;	1968
		1969	SV *
		1970	has_cctx (Coro::State coro)
		1971	PROTOTYPE: $
		1972	CODE:
		1973	RETVAL = boolSV (!!coro->cctx);
		1974	OUTPUT:
		1975	RETVAL
		1976
		1977	int
		1978	is_traced (Coro::State coro)
		1979	PROTOTYPE: $
		1980	CODE:
		1981	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1982	OUTPUT:
		1983	RETVAL
		1984
		1985	IV
		1986	rss (Coro::State coro)
		1987	PROTOTYPE: $
		1988	ALIAS:
		1989	usecount = 1
		1990	CODE:
		1991	switch (ix)
		1992	{
		1993	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1994	case 1: RETVAL = coro->usecount; break;
361	}	1995	}
		1996	OUTPUT:
		1997	RETVAL
362		1998
363	PUTBACK;	1999	void
364	}	2000	force_cctx ()
		2001	CODE:
		2002	struct coro *coro = SvSTATE (coro_current);
		2003	coro->cctx->idle_sp = 0;
365		2004
366	c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	2005	void
367	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	2006	throw (Coro::State self, SV *throw = &PL_sv_undef)
368	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	2007	PROTOTYPE: $;$
		2008	CODE:
		2009	SvREFCNT_dec (self->throw);
		2010	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
369		2011
370	c->dowarn = PL_dowarn;	2012	void
371		2013	swap_defsv (Coro::State self)
372	c->curstackinfo = PL_curstackinfo;	2014	PROTOTYPE: $
373	c->curstack = PL_curstack;	2015	ALIAS:
374	c->mainstack = PL_mainstack;	2016	swap_defav = 1
375	c->stack_sp = PL_stack_sp;	2017	CODE:
376	c->op = PL_op;	2018	if (!self->slot)
377	c->curpad = PL_curpad;	2019	croak ("cannot swap state with coroutine that has no saved state");
378	c->stack_base = PL_stack_base;	2020	else
379	c->stack_max = PL_stack_max;
380	c->tmps_stack = PL_tmps_stack;
381	c->tmps_floor = PL_tmps_floor;
382	c->tmps_ix = PL_tmps_ix;
383	c->tmps_max = PL_tmps_max;
384	c->markstack = PL_markstack;
385	c->markstack_ptr = PL_markstack_ptr;
386	c->markstack_max = PL_markstack_max;
387	c->scopestack = PL_scopestack;
388	c->scopestack_ix = PL_scopestack_ix;
389	c->scopestack_max = PL_scopestack_max;
390	c->savestack = PL_savestack;
391	c->savestack_ix = PL_savestack_ix;
392	c->savestack_max = PL_savestack_max;
393	c->retstack = PL_retstack;
394	c->retstack_ix = PL_retstack_ix;
395	c->retstack_max = PL_retstack_max;
396	c->curcop = PL_curcop;
397	}
398
399	/*
400	* destroy the stacks, the callchain etc...
401	* still there is a memleak of 128 bytes...
402	*/
403	STATIC void
404	destroy_stacks(pTHX)
405	{
406	/* is this ugly, I ask? */
407	while (PL_scopestack_ix)
408	LEAVE;
409
410	/* sure it is, but more important: is it correct?? :/ */
411	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
412	FREETMPS;
413
414	while (PL_curstackinfo->si_next)
415	PL_curstackinfo = PL_curstackinfo->si_next;
416
417	while (PL_curstackinfo)
418	{
419	PERL_SI *p = PL_curstackinfo->si_prev;
420
421	{	2021	{
422	dSP;	2022	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
423	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	2023	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
424	PUTBACK; /* possibly superfluous */	2024
		2025	SV tmp = src; src = dst; *dst = tmp;
425	}	2026	}
426		2027
427	dounwind(-1);
428
429	SvREFCNT_dec(PL_curstackinfo->si_stack);
430	Safefree(PL_curstackinfo->si_cxstack);
431	Safefree(PL_curstackinfo);
432	PL_curstackinfo = p;
433	}
434
435	Safefree(PL_tmps_stack);
436	Safefree(PL_markstack);
437	Safefree(PL_scopestack);
438	Safefree(PL_savestack);
439	Safefree(PL_retstack);
440	}
441
442	#define SUB_INIT "Coro::State::_newcoro"
443
444	MODULE = Coro::State PACKAGE = Coro::State	2028	MODULE = Coro::State PACKAGE = Coro
445
446	PROTOTYPES: ENABLE
447		2029
448	BOOT:	2030	BOOT:
449	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	2031	{
		2032	int i;
450		2033
451	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	2034	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
452	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	2035	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
453	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	2036	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
454		2037
455	if (!padlist_cache)	2038	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
456	padlist_cache = newHV ();	2039	SvREADONLY_on (coro_current);
457		2040
458	Coro::State	2041	coro_stash = gv_stashpv ("Coro", TRUE);
459	_newprocess(args)	2042
460	SV * args	2043	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		2044	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		2045	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		2046	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		2047	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		2048	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		2049
		2050	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		2051	coro_ready[i] = newAV ();
		2052
		2053	{
		2054	SV *sv = perl_get_sv ("Coro::API", TRUE);
		2055	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
		2056
		2057	coroapi.schedule = api_schedule;
		2058	coroapi.cede = api_cede;
		2059	coroapi.cede_notself = api_cede_notself;
		2060	coroapi.ready = api_ready;
		2061	coroapi.is_ready = api_is_ready;
		2062	coroapi.nready = &coro_nready;
		2063	coroapi.current = coro_current;
		2064
		2065	GCoroAPI = &coroapi;
		2066	sv_setiv (sv, (IV)&coroapi);
		2067	SvREADONLY_on (sv);
		2068	}
		2069	}
		2070
		2071	void
		2072	_set_current (SV *current)
461	PROTOTYPE: $	2073	PROTOTYPE: $
		2074	CODE:
		2075	SvREFCNT_dec (SvRV (coro_current));
		2076	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		2077
		2078	void
		2079	_set_readyhook (SV *hook)
		2080	PROTOTYPE: $
462	CODE:	2081	CODE:
463	Coro__State coro;
464
465	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
466	croak ("Coro::State::_newprocess expects an arrayref");
467		2082	LOCK;
468	New (0, coro, 1, struct coro);	2083	SvREFCNT_dec (coro_readyhook);
		2084	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		2085	UNLOCK;
469		2086
470	coro->mainstack = 0; /* actual work is done inside transfer */	2087	int
471	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	2088	prio (Coro::State coro, int newprio = 0)
472		2089	ALIAS:
		2090	nice = 1
		2091	CODE:
		2092	{
473	RETVAL = coro;	2093	RETVAL = coro->prio;
474	OUTPUT:	2094
		2095	if (items > 1)
		2096	{
		2097	if (ix)
		2098	newprio = coro->prio - newprio;
		2099
		2100	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		2101	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		2102
		2103	coro->prio = newprio;
		2104	}
		2105	}
		2106	OUTPUT:
475	RETVAL	2107	RETVAL
476		2108
		2109	SV *
		2110	ready (SV *self)
		2111	PROTOTYPE: $
		2112	CODE:
		2113	RETVAL = boolSV (api_ready (self));
		2114	OUTPUT:
		2115	RETVAL
		2116
		2117	int
		2118	nready (...)
		2119	PROTOTYPE:
		2120	CODE:
		2121	RETVAL = coro_nready;
		2122	OUTPUT:
		2123	RETVAL
		2124
		2125	# for async_pool speedup
477	void	2126	void
478	transfer(prev, next, flags = SAVE_DEFAV)	2127	_pool_1 (SV *cb)
479	Coro::State_or_hashref prev	2128	CODE:
480	Coro::State_or_hashref next	2129	{
481	int flags	2130	struct coro *coro = SvSTATE (coro_current);
		2131	HV hv = (HV )SvRV (coro_current);
		2132	AV *defav = GvAV (PL_defgv);
		2133	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2134	AV *invoke_av;
		2135	int i, len;
		2136
		2137	if (!invoke)
		2138	{
		2139	SV *old = PL_diehook;
		2140	PL_diehook = 0;
		2141	SvREFCNT_dec (old);
		2142	croak ("\3async_pool terminate\2\n");
		2143	}
		2144
		2145	SvREFCNT_dec (coro->saved_deffh);
		2146	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2147
		2148	hv_store (hv, "desc", sizeof ("desc") - 1,
		2149	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2150
		2151	invoke_av = (AV *)SvRV (invoke);
		2152	len = av_len (invoke_av);
		2153
		2154	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2155
		2156	if (len > 0)
		2157	{
		2158	av_fill (defav, len - 1);
		2159	for (i = 0; i < len; ++i)
		2160	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2161	}
		2162
		2163	SvREFCNT_dec (invoke);
		2164	}
		2165
		2166	void
		2167	_pool_2 (SV *cb)
		2168	CODE:
		2169	{
		2170	struct coro *coro = SvSTATE (coro_current);
		2171
		2172	sv_setsv (cb, &PL_sv_undef);
		2173
		2174	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		2175	coro->saved_deffh = 0;
		2176
		2177	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2178	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2179	{
		2180	SV *old = PL_diehook;
		2181	PL_diehook = 0;
		2182	SvREFCNT_dec (old);
		2183	croak ("\3async_pool terminate\2\n");
		2184	}
		2185
		2186	av_clear (GvAV (PL_defgv));
		2187	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2188	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2189
		2190	coro->prio = 0;
		2191
		2192	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2193	api_trace (coro_current, 0);
		2194
		2195	av_push (av_async_pool, newSVsv (coro_current));
		2196	}
		2197
		2198	#if 0
		2199
		2200	void
		2201	_generator_call (...)
		2202	PROTOTYPE: @
		2203	PPCODE:
		2204	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
		2205	xxxx
		2206	abort ();
		2207
		2208	SV *
		2209	gensub (SV *sub, ...)
		2210	PROTOTYPE: &;@
482	CODE:	2211	CODE:
		2212	{
		2213	struct coro *coro;
		2214	MAGIC *mg;
		2215	CV *xcv;
		2216	CV ncv = (CV )newSV_type (SVt_PVCV);
		2217	int i;
483		2218
484	if (prev != next)	2219	CvGV (ncv) = CvGV (cv);
		2220	CvFILE (ncv) = CvFILE (cv);
		2221
		2222	Newz (0, coro, 1, struct coro);
		2223	coro->args = newAV ();
		2224	coro->flags = CF_NEW;
		2225
		2226	av_extend (coro->args, items - 1);
		2227	for (i = 1; i < items; i++)
		2228	av_push (coro->args, newSVsv (ST (i)));
		2229
		2230	CvISXSUB_on (ncv);
		2231	CvXSUBANY (ncv).any_ptr = (void *)coro;
		2232
		2233	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
		2234
		2235	CvXSUB (ncv) = CvXSUB (xcv);
		2236	CvANON_on (ncv);
		2237
		2238	mg = sv_magicext ((SV )ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char )coro, 0);
		2239	RETVAL = newRV_noinc ((SV *)ncv);
		2240	}
		2241	OUTPUT:
		2242	RETVAL
		2243
		2244	#endif
		2245
		2246
		2247	MODULE = Coro::State PACKAGE = Coro::AIO
		2248
		2249	SV *
		2250	_get_state ()
		2251	CODE:
		2252	{
		2253	struct io_state *data;
		2254
		2255	RETVAL = newSV (sizeof (struct io_state));
		2256	data = (struct io_state *)SvPVX (RETVAL);
		2257	SvCUR_set (RETVAL, sizeof (struct io_state));
		2258	SvPOK_only (RETVAL);
		2259
		2260	data->errorno = errno;
		2261	data->laststype = PL_laststype;
		2262	data->laststatval = PL_laststatval;
		2263	data->statcache = PL_statcache;
		2264	}
		2265	OUTPUT:
		2266	RETVAL
		2267
		2268	void
		2269	_set_state (char *data_)
		2270	PROTOTYPE: $
		2271	CODE:
		2272	{
		2273	struct io_state data = (void )data_;
		2274
		2275	errno = data->errorno;
		2276	PL_laststype = data->laststype;
		2277	PL_laststatval = data->laststatval;
		2278	PL_statcache = data->statcache;
		2279	}
		2280
		2281
		2282	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2283
		2284	BOOT:
		2285	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2286
		2287	SV *
		2288	_schedule (...)
		2289	PROTOTYPE: @
		2290	CODE:
		2291	{
		2292	static int incede;
		2293
		2294	api_cede_notself ();
		2295
		2296	++incede;
		2297	while (coro_nready >= incede && api_cede ())
		2298	;
		2299
		2300	sv_setsv (sv_activity, &PL_sv_undef);
		2301	if (coro_nready >= incede)
485	{	2302	{
486	/*
487	* this could be done in newprocess which would lead to
488	* extremely elegant and fast (just SAVE/LOAD)
489	* code here, but lazy allocation of stacks has also
490	* some virtues and the overhead of the if() is nil.
491	*/
492	if (next->mainstack)
493	{
494	SAVE (prev, flags);
495	LOAD (next);
496	/* mark this state as in-use */
497	next->mainstack = 0;
498	next->tmps_ix = -2;
499	}
500	else if (next->tmps_ix == -2)
501	{
502	croak ("tried to transfer to running coroutine");
503	}
504	else
505	{
506	/*
507	* emulate part of the perl startup here.
508	*/
509	UNOP myop;
510
511	SAVE (prev, -1); /* first get rid of the old state */
512
513	init_stacks (); /* from perl.c */
514	SPAGAIN;
515
516	PL_op = (OP *)&myop;
517	/PL_curcop = 0;/
518	SvREFCNT_dec (GvAV (PL_defgv));
519	GvAV (PL_defgv) = next->args;
520
521	Zero(&myop, 1, UNOP);
522	myop.op_next = Nullop;
523	myop.op_flags = OPf_WANT_VOID;
524
525	PUSHMARK(SP);	2303	PUSHMARK (SP);
526	XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
527	/*
528	* the next line is slightly wrong, as PL_op->op_next
529	* is actually being executed so we skip the first op.
530	* that doesn't matter, though, since it is only
531	* pp_nextstate and we never return...
532	* ah yes, and I don't care anyways ;)
533	*/
534	PUTBACK;	2304	PUTBACK;
535	PL_op = pp_entersub(aTHX);	2305	call_pv ("Coro::AnyEvent::_activity", G_DISCARD \| G_EVAL);
536	SPAGAIN;	2306	SPAGAIN;
537
538	ENTER; /* necessary e.g. for dounwind */
539	}
540	}	2307	}
541		2308
542	void	2309	--incede;
543	DESTROY(coro)	2310	}
544	Coro::State coro
545	CODE:
546		2311
547	if (coro->mainstack)
548	{
549	struct coro temp;
550		2312
551	SAVE(aTHX_ (&temp), SAVE_ALL);	2313	MODULE = Coro::State PACKAGE = PerlIO::cede
552	LOAD(aTHX_ coro);
553		2314
554	destroy_stacks ();	2315	BOOT:
555		2316	PerlIO_define_layer (aTHX_ &PerlIO_cede);
556	LOAD((&temp)); /* this will get rid of defsv etc.. */
557	}
558
559	Safefree (coro);
560
561	void
562	flush()
563	CODE:
564	#ifdef MAY_FLUSH
565	flush_padlist_cache ();
566	#endif
567
568

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Comparing Coro/Coro/State.xs (file contents): Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs. Revision 1.246 by root, Wed Sep 24 21:20:05 2008 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs.
Revision 1.246 by root, Wed Sep 24 21:20:05 2008 UTC