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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs.
Revision 1.231 by root, Thu Apr 24 10:31:59 2008 UTC

…		…
1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	\|\| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	12	#include <stdio.h>
41	#include <errno.h>	13	#include <errno.h>
		14	#include <assert.h>
42		15
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	16	#ifdef WIN32
44	# undef STACKGUARD	17	# undef setjmp
45	#endif	18	# undef longjmp
46		19	# undef _exit
47	#ifndef STACKGUARD	20	#include <setjmp.h>
48	# define STACKGUARD 0	21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
49	#endif	23	#endif
50		24
51	#ifdef HAVE_MMAP	25	#ifdef HAVE_MMAP
52	# include <unistd.h>	26	# include <unistd.h>
53	# include <sys/mman.h>	27	# include <sys/mman.h>
69	#else	43	#else
70	# define PAGESIZE 0	44	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	45	# define BOOT_PAGESIZE (void)0
72	#endif	46	#endif
73		47
74	/* The next macro should declare a variable stacklevel that contains and approximation	48	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	49	# include <valgrind/valgrind.h>
76	* and should be unique. */	50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
		53	#endif
		54
		55	/* the maximum number of idle cctx that will be pooled */
		56	#define MAX_IDLE_CCTX 8
		57
		58	#define PERL_VERSION_ATLEAST(a,b,c) \
		59	(PERL_REVISION > (a) \
		60	\|\| (PERL_REVISION == (a) \
		61	&& (PERL_VERSION > (b) \
		62	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		63
		64	#if !PERL_VERSION_ATLEAST (5,6,0)
		65	# ifndef PL_ppaddr
		66	# define PL_ppaddr ppaddr
		67	# endif
		68	# ifndef call_sv
		69	# define call_sv perl_call_sv
		70	# endif
		71	# ifndef get_sv
		72	# define get_sv perl_get_sv
		73	# endif
		74	# ifndef get_cv
		75	# define get_cv perl_get_cv
		76	# endif
		77	# ifndef IS_PADGV
		78	# define IS_PADGV(v) 0
		79	# endif
		80	# ifndef IS_PADCONST
		81	# define IS_PADCONST(v) 0
		82	# endif
		83	#endif
		84
		85	/* 5.8.8 */
		86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
		98	/* 5.8.7 */
		99	#ifndef SvRV_set
		100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
		102
		103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		104	# undef CORO_STACKGUARD
		105	#endif
		106
		107	#ifndef CORO_STACKGUARD
		108	# define CORO_STACKGUARD 0
		109	#endif
		110
		111	/* prefer perl internal functions over our own? */
		112	#ifndef CORO_PREFER_PERL_FUNCTIONS
		113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
		115
		116	/* The next macros try to return the current stack pointer, in an as
		117	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	118	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	119	#define STACKLEVEL ((void *)&stacklevel)
79		120
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		122
82	#if __GNUC__ >= 3	123	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
84	#else	127	#else
85	# define attribute(x)	128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
86	#endif	131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
87		135
88	#define NOINLINE attribute ((noinline))	136	#define NOINLINE attribute ((noinline))
89		137
90	#include "CoroAPI.h"	138	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		139
94	#ifdef USE_ITHREADS	140	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	141	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	144	#else
99	# define LOCK (void)0	145	# define LOCK (void)0
100	# define UNLOCK (void)0	146	# define UNLOCK (void)0
101	#endif	147	#endif
102		148
		149	/* helper storage struct for Coro::AIO */
		150	struct io_state
		151	{
		152	int errorno;
		153	I32 laststype;
		154	int laststatval;
		155	Stat_t statcache;
		156	};
		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
104	static AV main_mainstack; / used to differentiate between $main and others */	160	static AV main_mainstack; / used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
105	static HV coro_state_stash, coro_stash;	162	static HV coro_state_stash, coro_stash;
106	static SV coro_mortal; / will be freed after next transfer */	163	static volatile SV coro_mortal; / will be freed after next transfer */
		164
		165	static GV irsgv; / $/ */
		166	static GV stdoutgv; / STDOUT /
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV hv_sig; / %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
107		175
108	static struct coro_cctx *cctx_first;	176	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	177	static int cctx_count, cctx_idle;
		178
		179	enum {
		180	CC_MAPPED = 0x01,
		181	CC_NOREUSE = 0x02, /* throw this away after tracing */
		182	CC_TRACE = 0x04,
		183	CC_TRACE_SUB = 0x08, /* trace sub calls */
		184	CC_TRACE_LINE = 0x10, /* trace each statement */
		185	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		186	};
110		187
111	/* this is a structure representing a c-level coroutine */	188	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	189	typedef struct coro_cctx {
113	struct coro_cctx *next;	190	struct coro_cctx *next;
114		191
115	/* the stack */	192	/* the stack */
116	void *sptr;	193	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	194	size_t ssize;
118		195
119	/* cpu state */	196	/* cpu state */
120	void idle_sp; / sp of top-level transfer/schedule/cede call */	197	void idle_sp; / sp of top-level transfer/schedule/cede call */
		198	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	199	JMPENV *top_env;
122	coro_context cctx;	200	coro_context cctx;
123		201
124	#if USE_VALGRIND	202	#if CORO_USE_VALGRIND
125	int valgrind_id;	203	int valgrind_id;
126	#endif	204	#endif
		205	unsigned char flags;
127	} coro_cctx;	206	} coro_cctx;
		207
		208	enum {
		209	CF_RUNNING = 0x0001, /* coroutine is running */
		210	CF_READY = 0x0002, /* coroutine is ready */
		211	CF_NEW = 0x0004, /* has never been switched to */
		212	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		213	};
		214
		215	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		216	typedef struct {
		217	SV *defsv;
		218	AV *defav;
		219	SV *errsv;
		220	SV *irsgv;
		221	#define VAR(name,type) type name;
		222	# include "state.h"
		223	#undef VAR
		224	} perl_slots;
		225
		226	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
128		227
129	/* this is a structure representing a perl-level coroutine */	228	/* this is a structure representing a perl-level coroutine */
130	struct coro {	229	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	230	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	231	coro_cctx *cctx;
133		232
		233	/* process data */
		234	AV *mainstack;
		235	perl_slots slot; / basically the saved sp */
		236
134	/* data associated with this coroutine (initial args) */	237	AV args; / data associated with this coroutine (initial args) */
135	AV *args;	238	int refcnt; /* coroutines are refcounted, yes */
136	int refcnt;	239	int flags; /* CF_ flags */
		240	HV hv; / the perl hash associated with this coro, if any */
137		241
138	/* optionally saved, might be zero */	242	/* statistics */
139	AV *defav;	243	int usecount; /* number of transfers to this coro */
140	SV *defsv;
141	SV *errsv;
142
143	#define VAR(name,type) type name;
144	# include "state.h"
145	#undef VAR
146		244
147	/* coro process data */	245	/* coro process data */
148	int prio;	246	int prio;
		247	SV throw; / exception to be thrown */
		248
		249	/* async_pool */
		250	SV *saved_deffh;
		251
		252	/* linked list */
		253	struct coro next, prev;
149	};	254	};
150		255
151	typedef struct coro *Coro__State;	256	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	257	typedef struct coro *Coro__State_or_hashref;
153		258
		259	/ Coro ******************************************************************/
		260
		261	#define PRIO_MAX 3
		262	#define PRIO_HIGH 1
		263	#define PRIO_NORMAL 0
		264	#define PRIO_LOW -1
		265	#define PRIO_IDLE -3
		266	#define PRIO_MIN -4
		267
		268	/* for Coro.pm */
		269	static SV *coro_current;
		270	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		271	static int coro_nready;
		272	static struct coro *coro_first;
		273
		274	/ lowlevel stuff ********************************************************/
		275
		276	static SV *
		277	coro_get_sv (pTHX_ const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,10,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_sv (name, create);
		282	#endif
		283	return get_sv (name, create);
		284	}
		285
154	static AV *	286	static AV *
		287	coro_get_av (pTHX_ const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,10,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_av (name, create);
		292	#endif
		293	return get_av (name, create);
		294	}
		295
		296	static HV *
		297	coro_get_hv (pTHX_ const char *name, int create)
		298	{
		299	#if PERL_VERSION_ATLEAST (5,10,0)
		300	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		301	get_hv (name, create);
		302	#endif
		303	return get_hv (name, create);
		304	}
		305
		306	static AV *
155	coro_clone_padlist (CV *cv)	307	coro_clone_padlist (pTHX_ CV *cv)
156	{	308	{
157	AV *padlist = CvPADLIST (cv);	309	AV *padlist = CvPADLIST (cv);
158	AV newpadlist, newpad;	310	AV newpadlist, newpad;
159		311
160	newpadlist = newAV ();	312	newpadlist = newAV ();
161	AvREAL_off (newpadlist);	313	AvREAL_off (newpadlist);
162	#if PERL_VERSION_ATLEAST (5,9,0)	314	#if PERL_VERSION_ATLEAST (5,10,0)
163	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	315	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
164	#else	316	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	317	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#endif	318	#endif
167	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	319	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
172		324
173	return newpadlist;	325	return newpadlist;
174	}	326	}
175		327
176	static void	328	static void
177	free_padlist (AV *padlist)	329	free_padlist (pTHX_ AV *padlist)
178	{	330	{
179	/* may be during global destruction */	331	/* may be during global destruction */
180	if (SvREFCNT (padlist))	332	if (SvREFCNT (padlist))
181	{	333	{
182	I32 i = AvFILLp (padlist);	334	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	355	AV *padlist;
204	AV av = (AV )mg->mg_obj;	356	AV av = (AV )mg->mg_obj;
205		357
206	/* casting is fun. */	358	/* casting is fun. */
207	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	359	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
208	free_padlist (padlist);	360	free_padlist (aTHX_ padlist);
209
210	SvREFCNT_dec (av);
211		361
212	return 0;	362	return 0;
213	}	363	}
214		364
215	#define PERL_MAGIC_coro PERL_MAGIC_ext	365	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		366	#define CORO_MAGIC_type_state PERL_MAGIC_ext
216		367
217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	368	static MGVTBL coro_cv_vtbl = {
		369	0, 0, 0, 0,
		370	coro_cv_free
		371	};
		372
		373	#define CORO_MAGIC(sv,type) \
		374	SvMAGIC (sv) \
		375	? SvMAGIC (sv)->mg_type == type \
		376	? SvMAGIC (sv) \
		377	: mg_find (sv, type) \
		378	: 0
		379
		380	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		381	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		382
		383	static struct coro *
		384	SvSTATE_ (pTHX_ SV *coro)
		385	{
		386	HV *stash;
		387	MAGIC *mg;
		388
		389	if (SvROK (coro))
		390	coro = SvRV (coro);
		391
		392	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		393	croak ("Coro::State object required");
		394
		395	stash = SvSTASH (coro);
		396	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		397	{
		398	/* very slow, but rare, check */
		399	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		400	croak ("Coro::State object required");
		401	}
		402
		403	mg = CORO_MAGIC_state (coro);
		404	return (struct coro *)mg->mg_ptr;
		405	}
		406
		407	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
218		408
219	/* the next two functions merely cache the padlists */	409	/* the next two functions merely cache the padlists */
220	static void	410	static void
221	get_padlist (CV *cv)	411	get_padlist (pTHX_ CV *cv)
222	{	412	{
223	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	413	MAGIC *mg = CORO_MAGIC_cv (cv);
		414	AV *av;
224		415
225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	416	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
226	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	417	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
227	else	418	else
228	{	419	{
229	#if 0	420	#if CORO_PREFER_PERL_FUNCTIONS
230	/* this is probably cleaner, but also slower? */	421	/* this is probably cleaner, but also slower? */
231	CV *cp = Perl_cv_clone (cv);	422	CV *cp = Perl_cv_clone (cv);
232	CvPADLIST (cv) = CvPADLIST (cp);	423	CvPADLIST (cv) = CvPADLIST (cp);
233	CvPADLIST (cp) = 0;	424	CvPADLIST (cp) = 0;
234	SvREFCNT_dec (cp);	425	SvREFCNT_dec (cp);
235	#else	426	#else
236	CvPADLIST (cv) = coro_clone_padlist (cv);	427	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
237	#endif	428	#endif
238	}	429	}
239	}	430	}
240		431
241	static void	432	static void
242	put_padlist (CV *cv)	433	put_padlist (pTHX_ CV *cv)
243	{	434	{
244	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	435	MAGIC *mg = CORO_MAGIC_cv (cv);
		436	AV *av;
245		437
246	if (!mg)	438	if (expect_false (!mg))
247	{	439	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
248	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
249	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
250	mg->mg_virtual = &vtbl_coro;
251	mg->mg_obj = (SV *)newAV ();
252	}
253		440
254	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	441	av = (AV *)mg->mg_obj;
255	}
256		442
257	#define SB do {	443	if (expect_false (AvFILLp (av) >= AvMAX (av)))
258	#define SE } while (0)	444	av_extend (av, AvMAX (av) + 1);
259		445
260	#define LOAD(state) load_state((state));	446	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261	#define SAVE(state,flags) save_state((state),(flags));	447	}
262		448
263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	449	/ load & save, init *****************************************************/
264		450
265	static void	451	static void
266	load_state(Coro__State c)	452	load_perl (pTHX_ Coro__State c)
267	{	453	{
		454	perl_slots *slot = c->slot;
		455	c->slot = 0;
		456
		457	PL_mainstack = c->mainstack;
		458
		459	GvSV (PL_defgv) = slot->defsv;
		460	GvAV (PL_defgv) = slot->defav;
		461	GvSV (PL_errgv) = slot->errsv;
		462	GvSV (irsgv) = slot->irsgv;
		463
268	#define VAR(name,type) PL_ ## name = c->name;	464	#define VAR(name,type) PL_ ## name = slot->name;
269	# include "state.h"	465	# include "state.h"
270	#undef VAR	466	#undef VAR
271
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275		467
276	{	468	{
277	dSP;	469	dSP;
		470
278	CV *cv;	471	CV *cv;
279		472
280	/* now do the ugly restore mess */	473	/* now do the ugly restore mess */
281	while ((cv = (CV *)POPs))	474	while (expect_true (cv = (CV *)POPs))
282	{	475	{
283	AV padlist = (AV )POPs;
284
285	if (padlist)
286	{
287	put_padlist (cv); /* mark this padlist as available */	476	put_padlist (aTHX_ cv); /* mark this padlist as available */
288	CvPADLIST(cv) = padlist;	477	CvDEPTH (cv) = PTR2IV (POPs);
289	}	478	CvPADLIST (cv) = (AV *)POPs;
290
291	++CvDEPTH(cv);
292	}	479	}
293		480
294	PUTBACK;	481	PUTBACK;
295	}	482	}
296	}	483	}
297		484
298	static void	485	static void
299	save_state(Coro__State c, int flags)	486	save_perl (pTHX_ Coro__State c)
300	{	487	{
301	{	488	{
302	dSP;	489	dSP;
303	I32 cxix = cxstack_ix;	490	I32 cxix = cxstack_ix;
304	PERL_CONTEXT *ccstk = cxstack;	491	PERL_CONTEXT *ccstk = cxstack;
…		…
307	/*	494	/*
308	* the worst thing you can imagine happens first - we have to save	495	* the worst thing you can imagine happens first - we have to save
309	* (and reinitialize) all cv's in the whole callchain :(	496	* (and reinitialize) all cv's in the whole callchain :(
310	*/	497	*/
311		498
312	PUSHs (Nullsv);	499	XPUSHs (Nullsv);
313	/* this loop was inspired by pp_caller */	500	/* this loop was inspired by pp_caller */
314	for (;;)	501	for (;;)
315	{	502	{
316	while (cxix >= 0)	503	while (expect_true (cxix >= 0))
317	{	504	{
318	PERL_CONTEXT *cx = &ccstk[cxix--];	505	PERL_CONTEXT *cx = &ccstk[cxix--];
319		506
320	if (CxTYPE(cx) == CXt_SUB)	507	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
321	{	508	{
322	CV *cv = cx->blk_sub.cv;	509	CV *cv = cx->blk_sub.cv;
		510
323	if (CvDEPTH(cv))	511	if (expect_true (CvDEPTH (cv)))
324	{	512	{
325	EXTEND (SP, CvDEPTH(cv)*2);	513	EXTEND (SP, 3);
326
327	while (--CvDEPTH(cv))
328	{
329	/* this tells the restore code to increment CvDEPTH */
330	PUSHs (Nullsv);
331	PUSHs ((SV *)cv);
332	}
333
334	PUSHs ((SV *)CvPADLIST(cv));	514	PUSHs ((SV *)CvPADLIST (cv));
		515	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
335	PUSHs ((SV *)cv);	516	PUSHs ((SV *)cv);
336		517
		518	CvDEPTH (cv) = 0;
337	get_padlist (cv);	519	get_padlist (aTHX_ cv);
338	}	520	}
339	}	521	}
340	#ifdef CXt_FORMAT
341	else if (CxTYPE(cx) == CXt_FORMAT)
342	{
343	/* I never used formats, so how should I know how these are implemented? */
344	/* my bold guess is as a simple, plain sub... */
345	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
346	}
347	#endif
348	}	522	}
349		523
350	if (top_si->si_type == PERLSI_MAIN)	524	if (expect_true (top_si->si_type == PERLSI_MAIN))
351	break;	525	break;
352		526
353	top_si = top_si->si_prev;	527	top_si = top_si->si_prev;
354	ccstk = top_si->si_cxstack;	528	ccstk = top_si->si_cxstack;
355	cxix = top_si->si_cxix;	529	cxix = top_si->si_cxix;
356	}	530	}
357		531
358	PUTBACK;	532	PUTBACK;
359	}	533	}
360		534
361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	535	/* allocate some space on the context stack for our purposes */
362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	536	/* we manually unroll here, as usually 2 slots is enough */
363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	537	if (SLOT_COUNT >= 1) CXINC;
		538	if (SLOT_COUNT >= 2) CXINC;
		539	if (SLOT_COUNT >= 3) CXINC;
		540	{
		541	int i;
		542	for (i = 3; i < SLOT_COUNT; ++i)
		543	CXINC;
		544	}
		545	cxstack_ix -= SLOT_COUNT; /* undo allocation */
364		546
		547	c->mainstack = PL_mainstack;
		548
		549	{
		550	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		551
		552	slot->defav = GvAV (PL_defgv);
		553	slot->defsv = DEFSV;
		554	slot->errsv = ERRSV;
		555	slot->irsgv = GvSV (irsgv);
		556
365	#define VAR(name,type)c->name = PL_ ## name;	557	#define VAR(name,type) slot->name = PL_ ## name;
366	# include "state.h"	558	# include "state.h"
367	#undef VAR	559	#undef VAR
		560	}
368	}	561	}
369		562
370	/*	563	/*
371	* allocate various perl stacks. This is an exact copy	564	* allocate various perl stacks. This is an exact copy
372	* of perl.c:init_stacks, except that it uses less memory	565	* of perl.c:init_stacks, except that it uses less memory
373	* on the (sometimes correct) assumption that coroutines do	566	* on the (sometimes correct) assumption that coroutines do
374	* not usually need a lot of stackspace.	567	* not usually need a lot of stackspace.
375	*/	568	*/
		569	#if CORO_PREFER_PERL_FUNCTIONS
		570	# define coro_init_stacks init_stacks
		571	#else
376	static void	572	static void
377	coro_init_stacks ()	573	coro_init_stacks (pTHX)
378	{	574	{
379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	575	PL_curstackinfo = new_stackinfo(32, 8);
380	PL_curstackinfo->si_type = PERLSI_MAIN;	576	PL_curstackinfo->si_type = PERLSI_MAIN;
381	PL_curstack = PL_curstackinfo->si_stack;	577	PL_curstack = PL_curstackinfo->si_stack;
382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	578	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
383		579
384	PL_stack_base = AvARRAY(PL_curstack);	580	PL_stack_base = AvARRAY(PL_curstack);
385	PL_stack_sp = PL_stack_base;	581	PL_stack_sp = PL_stack_base;
386	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	582	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
387		583
388	New(50,PL_tmps_stack,96,SV*);	584	New(50,PL_tmps_stack,32,SV*);
389	PL_tmps_floor = -1;	585	PL_tmps_floor = -1;
390	PL_tmps_ix = -1;	586	PL_tmps_ix = -1;
391	PL_tmps_max = 96;	587	PL_tmps_max = 32;
392		588
393	New(54,PL_markstack,16,I32);	589	New(54,PL_markstack,16,I32);
394	PL_markstack_ptr = PL_markstack;	590	PL_markstack_ptr = PL_markstack;
395	PL_markstack_max = PL_markstack + 16;	591	PL_markstack_max = PL_markstack + 16;
396		592
397	#ifdef SET_MARK_OFFSET	593	#ifdef SET_MARK_OFFSET
398	SET_MARK_OFFSET;	594	SET_MARK_OFFSET;
399	#endif	595	#endif
400		596
401	New(54,PL_scopestack,16,I32);	597	New(54,PL_scopestack,8,I32);
402	PL_scopestack_ix = 0;	598	PL_scopestack_ix = 0;
403	PL_scopestack_max = 16;	599	PL_scopestack_max = 8;
404		600
405	New(54,PL_savestack,96,ANY);	601	New(54,PL_savestack,24,ANY);
406	PL_savestack_ix = 0;	602	PL_savestack_ix = 0;
407	PL_savestack_max = 96;	603	PL_savestack_max = 24;
408		604
409	#if !PERL_VERSION_ATLEAST (5,9,0)	605	#if !PERL_VERSION_ATLEAST (5,10,0)
410	New(54,PL_retstack,8,OP*);	606	New(54,PL_retstack,4,OP*);
411	PL_retstack_ix = 0;	607	PL_retstack_ix = 0;
412	PL_retstack_max = 8;	608	PL_retstack_max = 4;
413	#endif	609	#endif
414	}	610	}
		611	#endif
415		612
416	/*	613	/*
417	* destroy the stacks, the callchain etc...	614	* destroy the stacks, the callchain etc...
418	*/	615	*/
419	static void	616	static void
420	coro_destroy_stacks ()	617	coro_destroy_stacks (pTHX)
421	{	618	{
422	if (!IN_DESTRUCT)
423	{
424	/* is this ugly, I ask? */
425	LEAVE_SCOPE (0);
426
427	/* sure it is, but more important: is it correct?? :/ */
428	FREETMPS;
429
430	/POPSTACK_TO (PL_mainstack);//D//use/
431	}
432
433	while (PL_curstackinfo->si_next)	619	while (PL_curstackinfo->si_next)
434	PL_curstackinfo = PL_curstackinfo->si_next;	620	PL_curstackinfo = PL_curstackinfo->si_next;
435		621
436	while (PL_curstackinfo)	622	while (PL_curstackinfo)
437	{	623	{
438	PERL_SI *p = PL_curstackinfo->si_prev;	624	PERL_SI *p = PL_curstackinfo->si_prev;
439		625
440	{ /D//remove/
441	dSP;
442	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
443	PUTBACK; /* possibly superfluous */
444	}
445
446	if (!IN_DESTRUCT)	626	if (!IN_DESTRUCT)
447	{
448	dounwind (-1);/D//remove/
449	SvREFCNT_dec (PL_curstackinfo->si_stack);	627	SvREFCNT_dec (PL_curstackinfo->si_stack);
450	}
451		628
452	Safefree (PL_curstackinfo->si_cxstack);	629	Safefree (PL_curstackinfo->si_cxstack);
453	Safefree (PL_curstackinfo);	630	Safefree (PL_curstackinfo);
454	PL_curstackinfo = p;	631	PL_curstackinfo = p;
455	}	632	}
456		633
457	Safefree (PL_tmps_stack);	634	Safefree (PL_tmps_stack);
458	Safefree (PL_markstack);	635	Safefree (PL_markstack);
459	Safefree (PL_scopestack);	636	Safefree (PL_scopestack);
460	Safefree (PL_savestack);	637	Safefree (PL_savestack);
461	#if !PERL_VERSION_ATLEAST (5,9,0)	638	#if !PERL_VERSION_ATLEAST (5,10,0)
462	Safefree (PL_retstack);	639	Safefree (PL_retstack);
463	#endif	640	#endif
464	}	641	}
465		642
		643	static size_t
		644	coro_rss (pTHX_ struct coro *coro)
		645	{
		646	size_t rss = sizeof (*coro);
		647
		648	if (coro->mainstack)
		649	{
		650	perl_slots tmp_slot;
		651	perl_slots *slot;
		652
		653	if (coro->flags & CF_RUNNING)
		654	{
		655	slot = &tmp_slot;
		656
		657	#define VAR(name,type) slot->name = PL_ ## name;
		658	# include "state.h"
		659	#undef VAR
		660	}
		661	else
		662	slot = coro->slot;
		663
		664	rss += sizeof (slot->curstackinfo);
		665	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		666	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		667	rss += slot->tmps_max * sizeof (SV *);
		668	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		669	rss += slot->scopestack_max * sizeof (I32);
		670	rss += slot->savestack_max * sizeof (ANY);
		671
		672	#if !PERL_VERSION_ATLEAST (5,10,0)
		673	rss += slot->retstack_max * sizeof (OP *);
		674	#endif
		675	}
		676
		677	return rss;
		678	}
		679
		680	/ coroutine stack handling **********************************************/
		681
		682	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
		683	static int (orig_sigelem_set) (pTHX_ SV sv, MAGIC *mg);
		684
		685	/*
		686	* This overrides the default magic get method of %SIG elements.
		687	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		688	* and instead of tryign to save and restore the hash elements, we just provide
		689	* readback here.
		690	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		691	* not expecting this to actually change the hook. This is a potential problem
		692	* when a schedule happens then, but we ignore this.
		693	*/
		694	static int
		695	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		696	{
		697	const char *s = MgPV_nolen_const (mg);
		698
		699	if (*s == '_')
		700	{
		701	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		702	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		703	}
		704
		705	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		706	}
		707
		708	static int
		709	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		710	{
		711	const char *s = MgPV_nolen_const (mg);
		712
		713	if (*s == '_')
		714	{
		715	SV **svp = 0;
		716
		717	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		718	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		719
		720	if (svp)
		721	{
		722	SV old = svp;
		723	*svp = newSVsv (sv);
		724	SvREFCNT_dec (old);
		725	return 0;
		726	}
		727	}
		728
		729	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		730	}
		731
466	static void	732	static void
467	setup_coro (struct coro *coro)	733	coro_setup (pTHX_ struct coro *coro)
468	{	734	{
469	/*	735	/*
470	* emulate part of the perl startup here.	736	* emulate part of the perl startup here.
471	*/	737	*/
472
473	coro_init_stacks ();	738	coro_init_stacks (aTHX);
474		739
		740	PL_runops = RUNOPS_DEFAULT;
		741	PL_curcop = &PL_compiling;
		742	PL_in_eval = EVAL_NULL;
475	PL_curcop = 0;	743	PL_comppad = 0;
476	PL_in_eval = 0;
477	PL_curpm = 0;	744	PL_curpm = 0;
		745	PL_curpad = 0;
		746	PL_localizing = 0;
		747	PL_dirty = 0;
		748	PL_restartop = 0;
		749	#if PERL_VERSION_ATLEAST (5,10,0)
		750	PL_parser = 0;
		751	#endif
		752
		753	/* recreate the die/warn hooks */
		754	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		755	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		756
		757	GvSV (PL_defgv) = newSV (0);
		758	GvAV (PL_defgv) = coro->args; coro->args = 0;
		759	GvSV (PL_errgv) = newSV (0);
		760	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		761	PL_rs = newSVsv (GvSV (irsgv));
		762	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
478		763
479	{	764	{
480	dSP;	765	dSP;
481	LOGOP myop;	766	LOGOP myop;
482		767
483	/* I have no idea why this is needed, but it is */
484	PUSHMARK (SP);
485
486	SvREFCNT_dec (GvAV (PL_defgv));
487	GvAV (PL_defgv) = coro->args; coro->args = 0;
488
489	Zero (&myop, 1, LOGOP);	768	Zero (&myop, 1, LOGOP);
490	myop.op_next = Nullop;	769	myop.op_next = Nullop;
491	myop.op_flags = OPf_WANT_VOID;	770	myop.op_flags = OPf_WANT_VOID;
492		771
		772	PUSHMARK (SP);
		773	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		774	PUTBACK;
493	PL_op = (OP *)&myop;	775	PL_op = (OP *)&myop;
494
495	PUSHMARK (SP);
496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
497	PUTBACK;
498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	776	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
499	SPAGAIN;	777	SPAGAIN;
500
501	ENTER; /* necessary e.g. for dounwind */
502	}	778	}
		779
		780	/* this newly created coroutine might be run on an existing cctx which most
		781	* likely was suspended in set_stacklevel, called from entersub.
		782	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		783	* so we ENTER here for symmetry
		784	*/
		785	ENTER;
503	}	786	}
504		787
505	static void	788	static void
		789	coro_destroy (pTHX_ struct coro *coro)
		790	{
		791	if (!IN_DESTRUCT)
		792	{
		793	/* restore all saved variables and stuff */
		794	LEAVE_SCOPE (0);
		795	assert (PL_tmps_floor == -1);
		796
		797	/* free all temporaries */
		798	FREETMPS;
		799	assert (PL_tmps_ix == -1);
		800
		801	/* unwind all extra stacks */
		802	POPSTACK_TO (PL_mainstack);
		803
		804	/* unwind main stack */
		805	dounwind (-1);
		806	}
		807
		808	SvREFCNT_dec (GvSV (PL_defgv));
		809	SvREFCNT_dec (GvAV (PL_defgv));
		810	SvREFCNT_dec (GvSV (PL_errgv));
		811	SvREFCNT_dec (PL_defoutgv);
		812	SvREFCNT_dec (PL_rs);
		813	SvREFCNT_dec (GvSV (irsgv));
		814
		815	SvREFCNT_dec (PL_diehook);
		816	SvREFCNT_dec (PL_warnhook);
		817
		818	SvREFCNT_dec (coro->saved_deffh);
		819	SvREFCNT_dec (coro->throw);
		820
		821	coro_destroy_stacks (aTHX);
		822	}
		823
		824	static void
506	free_coro_mortal ()	825	free_coro_mortal (pTHX)
507	{	826	{
508	if (coro_mortal)	827	if (expect_true (coro_mortal))
509	{	828	{
510	SvREFCNT_dec (coro_mortal);	829	SvREFCNT_dec (coro_mortal);
511	coro_mortal = 0;	830	coro_mortal = 0;
512	}	831	}
513	}	832	}
514		833
		834	static int
		835	runops_trace (pTHX)
		836	{
		837	COP *oldcop = 0;
		838	int oldcxix = -2;
		839	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		840	coro_cctx *cctx = coro->cctx;
		841
		842	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		843	{
		844	PERL_ASYNC_CHECK ();
		845
		846	if (cctx->flags & CC_TRACE_ALL)
		847	{
		848	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		849	{
		850	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		851	SV bot, top;
		852	AV av = newAV (); / return values */
		853	SV **cb;
		854	dSP;
		855
		856	GV *gv = CvGV (cx->blk_sub.cv);
		857	SV *fullname = sv_2mortal (newSV (0));
		858	if (isGV (gv))
		859	gv_efullname3 (fullname, gv, 0);
		860
		861	bot = PL_stack_base + cx->blk_oldsp + 1;
		862	top = cx->blk_gimme == G_ARRAY ? SP + 1
		863	: cx->blk_gimme == G_SCALAR ? bot + 1
		864	: bot;
		865
		866	av_extend (av, top - bot);
		867	while (bot < top)
		868	av_push (av, SvREFCNT_inc (*bot++));
		869
		870	PL_runops = RUNOPS_DEFAULT;
		871	ENTER;
		872	SAVETMPS;
		873	EXTEND (SP, 3);
		874	PUSHMARK (SP);
		875	PUSHs (&PL_sv_no);
		876	PUSHs (fullname);
		877	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		878	PUTBACK;
		879	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		880	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		881	SPAGAIN;
		882	FREETMPS;
		883	LEAVE;
		884	PL_runops = runops_trace;
		885	}
		886
		887	if (oldcop != PL_curcop)
		888	{
		889	oldcop = PL_curcop;
		890
		891	if (PL_curcop != &PL_compiling)
		892	{
		893	SV **cb;
		894
		895	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		896	{
		897	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		898
		899	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		900	{
		901	runops_proc_t old_runops = PL_runops;
		902	dSP;
		903	GV *gv = CvGV (cx->blk_sub.cv);
		904	SV *fullname = sv_2mortal (newSV (0));
		905
		906	if (isGV (gv))
		907	gv_efullname3 (fullname, gv, 0);
		908
		909	PL_runops = RUNOPS_DEFAULT;
		910	ENTER;
		911	SAVETMPS;
		912	EXTEND (SP, 3);
		913	PUSHMARK (SP);
		914	PUSHs (&PL_sv_yes);
		915	PUSHs (fullname);
		916	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		917	PUTBACK;
		918	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		919	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		920	SPAGAIN;
		921	FREETMPS;
		922	LEAVE;
		923	PL_runops = runops_trace;
		924	}
		925
		926	oldcxix = cxstack_ix;
		927	}
		928
		929	if (cctx->flags & CC_TRACE_LINE)
		930	{
		931	dSP;
		932
		933	PL_runops = RUNOPS_DEFAULT;
		934	ENTER;
		935	SAVETMPS;
		936	EXTEND (SP, 3);
		937	PL_runops = RUNOPS_DEFAULT;
		938	PUSHMARK (SP);
		939	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		940	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		941	PUTBACK;
		942	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		943	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		944	SPAGAIN;
		945	FREETMPS;
		946	LEAVE;
		947	PL_runops = runops_trace;
		948	}
		949	}
		950	}
		951	}
		952	}
		953
		954	TAINT_NOT;
		955	return 0;
		956	}
		957
		958	/* inject a fake call to Coro::State::_cctx_init into the execution */
		959	/* _cctx_init should be careful, as it could be called at almost any time */
		960	/* during execution of a perl program */
515	static void NOINLINE	961	static void NOINLINE
516	prepare_cctx (coro_cctx *cctx)	962	cctx_prepare (pTHX_ coro_cctx *cctx)
517	{	963	{
518	dSP;	964	dSP;
519	LOGOP myop;	965	LOGOP myop;
520		966
		967	PL_top_env = &PL_start_env;
		968
		969	if (cctx->flags & CC_TRACE)
		970	PL_runops = runops_trace;
		971
521	Zero (&myop, 1, LOGOP);	972	Zero (&myop, 1, LOGOP);
522	myop.op_next = PL_op;	973	myop.op_next = PL_op;
523	myop.op_flags = OPf_WANT_VOID;	974	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
524
525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
526		975
527	PUSHMARK (SP);	976	PUSHMARK (SP);
		977	EXTEND (SP, 2);
		978	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	979	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
529	PUTBACK;	980	PUTBACK;
		981	PL_op = (OP *)&myop;
530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	982	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
531	SPAGAIN;	983	SPAGAIN;
532	}	984	}
533		985
		986	/*
		987	* this is a _very_ stripped down perl interpreter ;)
		988	*/
534	static void	989	static void
535	coro_run (void *arg)	990	cctx_run (void *arg)
536	{	991	{
		992	dTHX;
		993
537	/* coro_run is the alternative epilogue of transfer() */	994	/* cctx_run is the alternative tail of transfer(), so unlock here. */
538	UNLOCK;	995	UNLOCK;
539		996
		997	/* we now skip the entersub that lead to transfer() */
		998	PL_op = PL_op->op_next;
		999
		1000	/* inject a fake subroutine call to cctx_init */
		1001	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1002
		1003	/* somebody or something will hit me for both perl_run and PL_restartop */
		1004	PL_restartop = PL_op;
		1005	perl_run (PL_curinterp);
		1006
540	/*	1007	/*
541	* this is a _very_ stripped down perl interpreter ;)	1008	* If perl-run returns we assume exit() was being called or the coro
		1009	* fell off the end, which seems to be the only valid (non-bug)
		1010	* reason for perl_run to return. We try to exit by jumping to the
		1011	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1012	* coroutine as Coro has no such concept
542	*/	1013	*/
543	PL_top_env = &PL_start_env;	1014	PL_top_env = main_top_env;
544		1015	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
545	/* inject call to cctx_init */
546	prepare_cctx ((coro_cctx *)arg);
547
548	/* somebody will hit me for both perl_run and PL_restartop */
549	perl_run (PL_curinterp);
550
551	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
552	abort ();
553	}	1016	}
554		1017
555	static coro_cctx *	1018	static coro_cctx *
556	cctx_new ()	1019	cctx_new ()
557	{	1020	{
558	coro_cctx *cctx;	1021	coro_cctx *cctx;
		1022	void *stack_start;
		1023	size_t stack_size;
559		1024
560	++cctx_count;	1025	++cctx_count;
561		1026
562	New (0, cctx, 1, coro_cctx);	1027	Newz (0, cctx, 1, coro_cctx);
563		1028
564	#if HAVE_MMAP	1029	#if HAVE_MMAP
565
566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1030	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
567	/* mmap suppsedly does allocate-on-write for us */	1031	/* mmap supposedly does allocate-on-write for us */
568	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1032	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
569		1033
570	if (cctx->sptr == (void *)-1)	1034	if (cctx->sptr != (void *)-1)
571	{
572	perror ("FATAL: unable to mmap stack for coroutine");
573	_exit (EXIT_FAILURE);
574	}	1035	{
575
576	# if STACKGUARD	1036	# if CORO_STACKGUARD
577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1037	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
578	# endif	1038	# endif
		1039	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1040	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1041	cctx->flags \|= CC_MAPPED;
		1042	}
		1043	else
		1044	#endif
		1045	{
		1046	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1047	New (0, cctx->sptr, coro_stacksize, long);
579		1048
580	#else
581
582	cctx->ssize = STACKSIZE * (long)sizeof (long);
583	New (0, cctx->sptr, STACKSIZE, long);
584
585	if (!cctx->sptr)	1049	if (!cctx->sptr)
586	{	1050	{
587	perror ("FATAL: unable to malloc stack for coroutine");	1051	perror ("FATAL: unable to allocate stack for coroutine");
588	_exit (EXIT_FAILURE);	1052	_exit (EXIT_FAILURE);
589	}	1053	}
590		1054
591	#endif	1055	stack_start = cctx->sptr;
		1056	stack_size = cctx->ssize;
		1057	}
592		1058
593	#if USE_VALGRIND	1059	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
594	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1060	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
595	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
596	cctx->ssize + (char *)cctx->sptr
597	);
598	#endif
599
600	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
601		1061
602	return cctx;	1062	return cctx;
603	}	1063	}
604		1064
605	static void	1065	static void
606	cctx_free (coro_cctx *cctx)	1066	cctx_destroy (coro_cctx *cctx)
607	{	1067	{
608	if (!cctx)	1068	if (!cctx)
609	return;	1069	return;
610		1070
611	--cctx_count;	1071	--cctx_count;
612		1072
613	#if USE_VALGRIND	1073	#if CORO_USE_VALGRIND
614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1074	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
615	#endif	1075	#endif
616		1076
617	#if HAVE_MMAP	1077	#if HAVE_MMAP
		1078	if (cctx->flags & CC_MAPPED)
618	munmap (cctx->sptr, cctx->ssize);	1079	munmap (cctx->sptr, cctx->ssize);
619	#else	1080	else
		1081	#endif
620	Safefree (cctx->sptr);	1082	Safefree (cctx->sptr);
621	#endif
622		1083
623	Safefree (cctx);	1084	Safefree (cctx);
624	}	1085	}
625		1086
		1087	/* wether this cctx should be destructed */
		1088	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1089
626	static coro_cctx *	1090	static coro_cctx *
627	cctx_get ()	1091	cctx_get (pTHX)
628	{	1092	{
629	coro_cctx *cctx;	1093	while (expect_true (cctx_first))
630
631	if (cctx_first)
632	{	1094	{
		1095	coro_cctx *cctx = cctx_first;
		1096	cctx_first = cctx->next;
633	--cctx_idle;	1097	--cctx_idle;
634	cctx = cctx_first;	1098
635	cctx_first = cctx->next;	1099	if (expect_true (!CCTX_EXPIRED (cctx)))
636	}	1100	return cctx;
637	else	1101
638	{	1102	cctx_destroy (cctx);
639	cctx = cctx_new ();
640	PL_op = PL_op->op_next;
641	}	1103	}
642		1104
643	return cctx;	1105	return cctx_new ();
644	}	1106	}
645		1107
646	static void	1108	static void
647	cctx_put (coro_cctx *cctx)	1109	cctx_put (coro_cctx *cctx)
648	{	1110	{
		1111	/* free another cctx if overlimit */
		1112	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1113	{
		1114	coro_cctx *first = cctx_first;
		1115	cctx_first = first->next;
		1116	--cctx_idle;
		1117
		1118	cctx_destroy (first);
		1119	}
		1120
649	++cctx_idle;	1121	++cctx_idle;
650	cctx->next = cctx_first;	1122	cctx->next = cctx_first;
651	cctx_first = cctx;	1123	cctx_first = cctx;
652	}	1124	}
653		1125
654	/* never call directly, always through the coro_state_transfer global variable */	1126	/ coroutine switching ***************************************************/
		1127
		1128	static void
		1129	transfer_check (pTHX_ struct coro prev, struct coro next)
		1130	{
		1131	if (expect_true (prev != next))
		1132	{
		1133	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1134	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1135
		1136	if (expect_false (next->flags & CF_RUNNING))
		1137	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1138
		1139	if (expect_false (next->flags & CF_DESTROYED))
		1140	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1141
		1142	#if !PERL_VERSION_ATLEAST (5,10,0)
		1143	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1144	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1145	#endif
		1146	}
		1147	}
		1148
		1149	/* always use the TRANSFER macro */
655	static void NOINLINE	1150	static void NOINLINE
656	transfer (struct coro prev, struct coro next, int flags)	1151	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
657	{	1152	{
658	dSTACKLEVEL;	1153	dSTACKLEVEL;
		1154	static volatile int has_throw;
659		1155
660	/* sometimes transfer is only called to set idle_sp */	1156	/* sometimes transfer is only called to set idle_sp */
661	if (flags == TRANSFER_SET_STACKLEVEL)	1157	if (expect_false (!next))
		1158	{
662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1159	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1160	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1161	}
663	else if (prev != next)	1162	else if (expect_true (prev != next))
664	{	1163	{
665	coro_cctx *prev__cctx;	1164	coro_cctx *prev__cctx;
666		1165
		1166	if (expect_false (prev->flags & CF_NEW))
		1167	{
		1168	/* create a new empty context */
		1169	Newz (0, prev->cctx, 1, coro_cctx);
		1170	prev->flags &= ~CF_NEW;
		1171	prev->flags \|= CF_RUNNING;
		1172	}
		1173
		1174	prev->flags &= ~CF_RUNNING;
		1175	next->flags \|= CF_RUNNING;
		1176
667	LOCK;	1177	LOCK;
668		1178
669	if (next->mainstack)	1179	/* first get rid of the old state */
		1180	save_perl (aTHX_ prev);
		1181
		1182	if (expect_false (next->flags & CF_NEW))
670	{	1183	{
671	/* coroutine already started */	1184	/* need to start coroutine */
672	SAVE (prev, flags);	1185	next->flags &= ~CF_NEW;
673	LOAD (next);	1186	/* setup coroutine call */
		1187	coro_setup (aTHX_ next);
674	}	1188	}
675	else	1189	else
		1190	load_perl (aTHX_ next);
		1191
		1192	prev__cctx = prev->cctx;
		1193
		1194	/* possibly "free" the cctx */
		1195	if (expect_true (
		1196	prev__cctx->idle_sp == STACKLEVEL
		1197	&& !(prev__cctx->flags & CC_TRACE)
		1198	&& !force_cctx
		1199	))
676	{	1200	{
677	/* need to start coroutine */	1201	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
678	/* first get rid of the old state */	1202	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
679	SAVE (prev, -1);	1203
680	/* setup coroutine call */
681	setup_coro (next);
682	/* need a stack */
683	next->cctx = 0;	1204	prev->cctx = 0;
		1205
		1206	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1207	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1208	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1209	if (!next->cctx)
		1210	next->cctx = cctx_get (aTHX);
		1211
		1212	cctx_put (prev__cctx);
684	}	1213	}
685		1214
686	if (!prev->cctx)	1215	++next->usecount;
687	/* create a new empty context */
688	Newz (0, prev->cctx, 1, coro_cctx);
689		1216
690	prev__cctx = prev->cctx;
691
692	/* possibly "free" the cctx */
693	if (prev__cctx->idle_sp == STACKLEVEL)
694	{
695	cctx_put (prev__cctx);
696	prev->cctx = 0;
697	}
698
699	if (!next->cctx)	1217	if (expect_true (!next->cctx))
700	next->cctx = cctx_get ();	1218	next->cctx = cctx_get (aTHX);
701		1219
		1220	has_throw = !!next->throw;
		1221
702	if (prev__cctx != next->cctx)	1222	if (expect_false (prev__cctx != next->cctx))
703	{	1223	{
704	prev__cctx->top_env = PL_top_env;	1224	prev__cctx->top_env = PL_top_env;
705	PL_top_env = next->cctx->top_env;	1225	PL_top_env = next->cctx->top_env;
706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1226	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
707	}	1227	}
708		1228
709	free_coro_mortal ();	1229	free_coro_mortal (aTHX);
710
711	UNLOCK;	1230	UNLOCK;
		1231
		1232	if (expect_false (has_throw))
		1233	{
		1234	struct coro *coro = SvSTATE (coro_current);
		1235
		1236	if (coro->throw)
		1237	{
		1238	SV *exception = coro->throw;
		1239	coro->throw = 0;
		1240	sv_setsv (ERRSV, exception);
		1241	croak (0);
		1242	}
		1243	}
712	}	1244	}
713	}	1245	}
714		1246
715	struct transfer_args	1247	struct transfer_args
716	{	1248	{
717	struct coro prev, next;	1249	struct coro prev, next;
718	int flags;
719	};	1250	};
720		1251
		1252	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1253	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
722		1254
		1255	/ high level stuff ******************************************************/
		1256
723	static void	1257	static int
724	coro_state_destroy (struct coro *coro)	1258	coro_state_destroy (pTHX_ struct coro *coro)
725	{	1259	{
726	if (coro->refcnt--)	1260	if (coro->flags & CF_DESTROYED)
727	return;	1261	return 0;
		1262
		1263	coro->flags \|= CF_DESTROYED;
		1264
		1265	if (coro->flags & CF_READY)
		1266	{
		1267	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1268	/* alternative: look through all ready queues and remove the coro */
		1269	LOCK;
		1270	--coro_nready;
		1271	UNLOCK;
		1272	}
		1273	else
		1274	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
728		1275
729	if (coro->mainstack && coro->mainstack != main_mainstack)	1276	if (coro->mainstack && coro->mainstack != main_mainstack)
730	{	1277	{
731	struct coro temp;	1278	struct coro temp;
732		1279
733	SAVE ((&temp), TRANSFER_SAVE_ALL);	1280	if (coro->flags & CF_RUNNING)
734	LOAD (coro);	1281	croak ("FATAL: tried to destroy currently running coroutine");
735		1282
736	coro_destroy_stacks ();	1283	save_perl (aTHX_ &temp);
		1284	load_perl (aTHX_ coro);
737		1285
738	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1286	coro_destroy (aTHX_ coro);
739		1287
		1288	load_perl (aTHX_ &temp);
		1289
740	coro->mainstack = 0;	1290	coro->slot = 0;
741	}	1291	}
742		1292
743	cctx_free (coro->cctx);	1293	cctx_destroy (coro->cctx);
744	SvREFCNT_dec (coro->args);	1294	SvREFCNT_dec (coro->args);
745	Safefree (coro);	1295
		1296	if (coro->next) coro->next->prev = coro->prev;
		1297	if (coro->prev) coro->prev->next = coro->next;
		1298	if (coro == coro_first) coro_first = coro->next;
		1299
		1300	return 1;
746	}	1301	}
747		1302
748	static int	1303	static int
749	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1304	coro_state_free (pTHX_ SV sv, MAGIC mg)
750	{	1305	{
751	struct coro coro = (struct coro )mg->mg_ptr;	1306	struct coro coro = (struct coro )mg->mg_ptr;
752	mg->mg_ptr = 0;	1307	mg->mg_ptr = 0;
753		1308
		1309	coro->hv = 0;
		1310
		1311	if (--coro->refcnt < 0)
		1312	{
754	coro_state_destroy (coro);	1313	coro_state_destroy (aTHX_ coro);
		1314	Safefree (coro);
		1315	}
755		1316
756	return 0;	1317	return 0;
757	}	1318	}
758		1319
759	static int	1320	static int
…		…
766	return 0;	1327	return 0;
767	}	1328	}
768		1329
769	static MGVTBL coro_state_vtbl = {	1330	static MGVTBL coro_state_vtbl = {
770	0, 0, 0, 0,	1331	0, 0, 0, 0,
771	coro_state_clear,	1332	coro_state_free,
772	0,	1333	0,
773	#ifdef MGf_DUP	1334	#ifdef MGf_DUP
774	coro_state_dup,	1335	coro_state_dup,
775	#else	1336	#else
776	# define MGf_DUP 0	1337	# define MGf_DUP 0
777	#endif	1338	#endif
778	};	1339	};
779		1340
780	static struct coro *
781	SvSTATE (SV *coro)
782	{
783	HV *stash;
784	MAGIC *mg;
785
786	if (SvROK (coro))
787	coro = SvRV (coro);
788
789	stash = SvSTASH (coro);
790	if (stash != coro_stash && stash != coro_state_stash)
791	{
792	/* very slow, but rare, check */
793	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
794	croak ("Coro::State object required");
795	}
796
797	mg = SvMAGIC (coro);
798	assert (mg->mg_type == PERL_MAGIC_ext);
799	return (struct coro *)mg->mg_ptr;
800	}
801
802	static void	1341	static void
803	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1342	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
804	{	1343	{
805	ta->prev = SvSTATE (prev);	1344	ta->prev = SvSTATE (prev_sv);
806	ta->next = SvSTATE (next);	1345	ta->next = SvSTATE (next_sv);
807	ta->flags = flags;	1346	TRANSFER_CHECK (*ta);
808	}	1347	}
809		1348
810	static void	1349	static void
811	api_transfer (SV prev, SV next, int flags)	1350	api_transfer (SV prev_sv, SV next_sv)
812	{	1351	{
813	dTHX;	1352	dTHX;
814	struct transfer_args ta;	1353	struct transfer_args ta;
815		1354
816	prepare_transfer (&ta, prev, next, flags);	1355	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
817	TRANSFER (ta);	1356	TRANSFER (ta, 1);
818	}	1357	}
819		1358
820	/ Coro ******************************************************************/	1359	/ Coro ******************************************************************/
821		1360
822	#define PRIO_MAX 3
823	#define PRIO_HIGH 1
824	#define PRIO_NORMAL 0
825	#define PRIO_LOW -1
826	#define PRIO_IDLE -3
827	#define PRIO_MIN -4
828
829	/* for Coro.pm */
830	static GV coro_current, coro_idle;
831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832	static int coro_nready;
833
834	static void	1361	static void
835	coro_enq (SV *sv)	1362	coro_enq (pTHX_ SV *coro_sv)
		1363	{
		1364	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1365	}
		1366
		1367	static SV *
		1368	coro_deq (pTHX)
836	{	1369	{
837	int prio;	1370	int prio;
838		1371
839	if (SvTYPE (sv) != SVt_PVHV)
840	croak ("Coro::ready tried to enqueue something that is not a coroutine");
841
842	prio = SvSTATE (sv)->prio;
843
844	av_push (coro_ready [prio - PRIO_MIN], sv);
845	coro_nready++;
846	}
847
848	static SV *
849	coro_deq (int min_prio)
850	{
851	int prio = PRIO_MAX - PRIO_MIN;
852
853	min_prio -= PRIO_MIN;
854	if (min_prio < 0)
855	min_prio = 0;
856
857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1372	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
858	if (AvFILLp (coro_ready [prio]) >= 0)	1373	if (AvFILLp (coro_ready [prio]) >= 0)
859	{
860	coro_nready--;
861	return av_shift (coro_ready [prio]);	1374	return av_shift (coro_ready [prio]);
862	}
863		1375
864	return 0;	1376	return 0;
865	}	1377	}
866		1378
		1379	static int
		1380	api_ready (SV *coro_sv)
		1381	{
		1382	dTHX;
		1383	struct coro *coro;
		1384
		1385	if (SvROK (coro_sv))
		1386	coro_sv = SvRV (coro_sv);
		1387
		1388	coro = SvSTATE (coro_sv);
		1389
		1390	if (coro->flags & CF_READY)
		1391	return 0;
		1392
		1393	coro->flags \|= CF_READY;
		1394
		1395	LOCK;
		1396	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1397	++coro_nready;
		1398	UNLOCK;
		1399
		1400	return 1;
		1401	}
		1402
		1403	static int
		1404	api_is_ready (SV *coro_sv)
		1405	{
		1406	dTHX;
		1407	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1408	}
		1409
867	static void	1410	static void
868	api_ready (SV *coro)	1411	prepare_schedule (pTHX_ struct transfer_args *ta)
869	{	1412	{
870	dTHX;	1413	SV prev_sv, next_sv;
871		1414
872	if (SvROK (coro))	1415	for (;;)
873	coro = SvRV (coro);	1416	{
		1417	LOCK;
		1418	next_sv = coro_deq (aTHX);
		1419
		1420	/* nothing to schedule: call the idle handler */
		1421	if (expect_false (!next_sv))
		1422	{
		1423	dSP;
		1424	UNLOCK;
		1425
		1426	ENTER;
		1427	SAVETMPS;
		1428
		1429	PUSHMARK (SP);
		1430	PUTBACK;
		1431	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1432	SPAGAIN;
		1433
		1434	FREETMPS;
		1435	LEAVE;
		1436	continue;
		1437	}
		1438
		1439	ta->next = SvSTATE (next_sv);
		1440
		1441	/* cannot transfer to destroyed coros, skip and look for next */
		1442	if (expect_false (ta->next->flags & CF_DESTROYED))
		1443	{
		1444	UNLOCK;
		1445	SvREFCNT_dec (next_sv);
		1446	/* coro_nready is already taken care of by destroy */
		1447	continue;
		1448	}
		1449
		1450	--coro_nready;
		1451	UNLOCK;
		1452	break;
		1453	}
		1454
		1455	/* free this only after the transfer */
		1456	prev_sv = SvRV (coro_current);
		1457	ta->prev = SvSTATE (prev_sv);
		1458	TRANSFER_CHECK (*ta);
		1459	assert (ta->next->flags & CF_READY);
		1460	ta->next->flags &= ~CF_READY;
		1461	SvRV_set (coro_current, next_sv);
874		1462
875	LOCK;	1463	LOCK;
876	coro_enq (SvREFCNT_inc (coro));	1464	free_coro_mortal (aTHX);
		1465	coro_mortal = prev_sv;
877	UNLOCK;	1466	UNLOCK;
878	}	1467	}
879		1468
880	static void	1469	static void
881	prepare_schedule (struct transfer_args *ta)
882	{
883	SV current, prev, *next;
884
885	current = GvSV (coro_current);
886
887	for (;;)
888	{
889	LOCK;
890	next = coro_deq (PRIO_MIN);
891	UNLOCK;
892
893	if (next)
894	break;
895
896	{
897	dSP;
898
899	ENTER;
900	SAVETMPS;
901
902	PUSHMARK (SP);
903	PUTBACK;
904	call_sv (GvSV (coro_idle), G_DISCARD);
905
906	FREETMPS;
907	LEAVE;
908	}
909	}
910
911	prev = SvRV (current);
912	SvRV (current) = next;
913
914	/* free this only after the transfer */
915	LOCK;
916	free_coro_mortal ();
917	UNLOCK;
918	coro_mortal = prev;
919
920	ta->prev = SvSTATE (prev);
921	ta->next = SvSTATE (next);
922	ta->flags = TRANSFER_SAVE_ALL;
923	}
924
925	static void
926	prepare_cede (struct transfer_args *ta)	1470	prepare_cede (pTHX_ struct transfer_args *ta)
927	{	1471	{
928	LOCK;	1472	api_ready (coro_current);
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930	UNLOCK;
931
932	prepare_schedule (ta);	1473	prepare_schedule (aTHX_ ta);
		1474	}
		1475
		1476	static int
		1477	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1478	{
		1479	if (coro_nready)
		1480	{
		1481	SV *prev = SvRV (coro_current);
		1482	prepare_schedule (aTHX_ ta);
		1483	api_ready (prev);
		1484	return 1;
		1485	}
		1486	else
		1487	return 0;
933	}	1488	}
934		1489
935	static void	1490	static void
936	api_schedule (void)	1491	api_schedule (void)
937	{	1492	{
938	dTHX;	1493	dTHX;
939	struct transfer_args ta;	1494	struct transfer_args ta;
940		1495
941	prepare_schedule (&ta);	1496	prepare_schedule (aTHX_ &ta);
942	TRANSFER (ta);	1497	TRANSFER (ta, 1);
943	}	1498	}
944		1499
945	static void	1500	static int
946	api_cede (void)	1501	api_cede (void)
947	{	1502	{
948	dTHX;	1503	dTHX;
949	struct transfer_args ta;	1504	struct transfer_args ta;
950		1505
951	prepare_cede (&ta);	1506	prepare_cede (aTHX_ &ta);
		1507
		1508	if (expect_true (ta.prev != ta.next))
		1509	{
952	TRANSFER (ta);	1510	TRANSFER (ta, 1);
		1511	return 1;
		1512	}
		1513	else
		1514	return 0;
953	}	1515	}
954		1516
		1517	static int
		1518	api_cede_notself (void)
		1519	{
		1520	dTHX;
		1521	struct transfer_args ta;
		1522
		1523	if (prepare_cede_notself (aTHX_ &ta))
		1524	{
		1525	TRANSFER (ta, 1);
		1526	return 1;
		1527	}
		1528	else
		1529	return 0;
		1530	}
		1531
		1532	static void
		1533	api_trace (SV *coro_sv, int flags)
		1534	{
		1535	dTHX;
		1536	struct coro *coro = SvSTATE (coro_sv);
		1537
		1538	if (flags & CC_TRACE)
		1539	{
		1540	if (!coro->cctx)
		1541	coro->cctx = cctx_new ();
		1542	else if (!(coro->cctx->flags & CC_TRACE))
		1543	croak ("cannot enable tracing on coroutine with custom stack");
		1544
		1545	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1546	}
		1547	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1548	{
		1549	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1550
		1551	if (coro->flags & CF_RUNNING)
		1552	PL_runops = RUNOPS_DEFAULT;
		1553	else
		1554	coro->slot->runops = RUNOPS_DEFAULT;
		1555	}
		1556	}
		1557
955	MODULE = Coro::State PACKAGE = Coro::State	1558	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956		1559
957	PROTOTYPES: DISABLE	1560	PROTOTYPES: DISABLE
958		1561
959	BOOT:	1562	BOOT:
960	{	1563	{
961	#ifdef USE_ITHREADS	1564	#ifdef USE_ITHREADS
962	MUTEX_INIT (&coro_mutex);	1565	MUTEX_INIT (&coro_mutex);
963	#endif	1566	#endif
964	BOOT_PAGESIZE;	1567	BOOT_PAGESIZE;
965		1568
		1569	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1570	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1571
		1572	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1573	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1574	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1575	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1576
		1577	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1578	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1579	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1580
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1581	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1582
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1583	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1584	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1585	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1586	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
971		1587
972	main_mainstack = PL_mainstack;	1588	main_mainstack = PL_mainstack;
		1589	main_top_env = PL_top_env;
		1590
		1591	while (main_top_env->je_prev)
		1592	main_top_env = main_top_env->je_prev;
973		1593
974	coroapi.ver = CORO_API_VERSION;	1594	coroapi.ver = CORO_API_VERSION;
		1595	coroapi.rev = CORO_API_REVISION;
975	coroapi.transfer = api_transfer;	1596	coroapi.transfer = api_transfer;
976		1597
977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1598	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
978	}	1599	}
979		1600
980	SV *	1601	SV *
981	new (char *klass, ...)	1602	new (char *klass, ...)
982	CODE:	1603	CODE:
983	{	1604	{
984	struct coro *coro;	1605	struct coro *coro;
		1606	MAGIC *mg;
985	HV *hv;	1607	HV *hv;
986	int i;	1608	int i;
987		1609
988	Newz (0, coro, 1, struct coro);	1610	Newz (0, coro, 1, struct coro);
989	coro->args = newAV ();	1611	coro->args = newAV ();
		1612	coro->flags = CF_NEW;
990		1613
		1614	if (coro_first) coro_first->prev = coro;
		1615	coro->next = coro_first;
		1616	coro_first = coro;
		1617
991	hv = newHV ();	1618	coro->hv = hv = newHV ();
992	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1619	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1620	mg->mg_flags \|= MGf_DUP;
993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1621	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994		1622
		1623	av_extend (coro->args, items - 1);
995	for (i = 1; i < items; i++)	1624	for (i = 1; i < items; i++)
996	av_push (coro->args, newSVsv (ST (i)));	1625	av_push (coro->args, newSVsv (ST (i)));
997	}	1626	}
998	OUTPUT:	1627	OUTPUT:
999	RETVAL	1628	RETVAL
1000		1629
		1630	# these not obviously related functions are all rolled into the same xs
		1631	# function to increase chances that they all will call transfer with the same
		1632	# stack offset
1001	void	1633	void
1002	_set_stacklevel (...)	1634	_set_stacklevel (...)
1003	ALIAS:	1635	ALIAS:
1004	Coro::State::transfer = 1	1636	Coro::State::transfer = 1
1005	Coro::schedule = 2	1637	Coro::schedule = 2
1006	Coro::cede = 3	1638	Coro::cede = 3
1007	Coro::Cont::yield = 4	1639	Coro::cede_notself = 4
1008	CODE:	1640	CODE:
1009	{	1641	{
1010	struct transfer_args ta;	1642	struct transfer_args ta;
1011		1643
		1644	PUTBACK;
1012	switch (ix)	1645	switch (ix)
1013	{	1646	{
1014	case 0:	1647	case 0:
1015	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1648	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1016	ta.next = 0;	1649	ta.next = 0;
1017	ta.flags = TRANSFER_SET_STACKLEVEL;
1018	break;	1650	break;
1019		1651
1020	case 1:	1652	case 1:
1021	if (items != 3)	1653	if (items != 2)
1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1654	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1023		1655
1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1656	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1025	break;	1657	break;
1026		1658
1027	case 2:	1659	case 2:
1028	prepare_schedule (&ta);	1660	prepare_schedule (aTHX_ &ta);
1029	break;	1661	break;
1030		1662
1031	case 3:	1663	case 3:
1032	prepare_cede (&ta);	1664	prepare_cede (aTHX_ &ta);
1033	break;	1665	break;
1034		1666
1035	case 4:	1667	case 4:
1036	{	1668	if (!prepare_cede_notself (aTHX_ &ta))
1037	SV *yieldstack;	1669	XSRETURN_EMPTY;
1038	SV *sv;
1039	AV *defav = GvAV (PL_defgv);
1040		1670
1041	yieldstack = *hv_fetch (
1042	(HV *)SvRV (GvSV (coro_current)),
1043	"yieldstack", sizeof ("yieldstack") - 1,
1044	0
1045	);
1046
1047	/* set up @_ -- ugly */
1048	av_clear (defav);
1049	av_fill (defav, items - 1);
1050	while (items--)
1051	av_store (defav, items, SvREFCNT_inc (ST(items)));
1052
1053	sv = av_pop ((AV *)SvRV (yieldstack));
1054	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1055	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1056	ta.flags = 0;
1057	SvREFCNT_dec (sv);
1058	}
1059	break;	1671	break;
1060
1061	}	1672	}
		1673	SPAGAIN;
1062		1674
		1675	BARRIER;
		1676	PUTBACK;
1063	TRANSFER (ta);	1677	TRANSFER (ta, 0);
		1678	SPAGAIN; /* might be the sp of a different coroutine now */
		1679	/* be extra careful not to ever do anything after TRANSFER */
1064	}	1680	}
1065		1681
1066	void	1682	bool
1067	_clone_state_from (SV dst, SV src)	1683	_destroy (SV *coro_sv)
1068	CODE:	1684	CODE:
1069	{	1685	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1070	struct coro *coro_src = SvSTATE (src);	1686	OUTPUT:
1071		1687	RETVAL
1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1073
1074	++coro_src->refcnt;
1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1076	}
1077		1688
1078	void	1689	void
1079	_exit (code)	1690	_exit (code)
1080	int code	1691	int code
1081	PROTOTYPE: $	1692	PROTOTYPE: $
1082	CODE:	1693	CODE:
1083	_exit (code);	1694	_exit (code);
1084		1695
1085	int	1696	int
		1697	cctx_stacksize (int new_stacksize = 0)
		1698	CODE:
		1699	RETVAL = coro_stacksize;
		1700	if (new_stacksize)
		1701	coro_stacksize = new_stacksize;
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	int
1086	cctx_count ()	1706	cctx_count ()
1087	CODE:	1707	CODE:
1088	RETVAL = cctx_count;	1708	RETVAL = cctx_count;
1089	OUTPUT:	1709	OUTPUT:
1090	RETVAL	1710	RETVAL
…		…
1094	CODE:	1714	CODE:
1095	RETVAL = cctx_idle;	1715	RETVAL = cctx_idle;
1096	OUTPUT:	1716	OUTPUT:
1097	RETVAL	1717	RETVAL
1098		1718
		1719	void
		1720	list ()
		1721	PPCODE:
		1722	{
		1723	struct coro *coro;
		1724	for (coro = coro_first; coro; coro = coro->next)
		1725	if (coro->hv)
		1726	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1727	}
		1728
		1729	void
		1730	call (Coro::State coro, SV *coderef)
		1731	ALIAS:
		1732	eval = 1
		1733	CODE:
		1734	{
		1735	if (coro->mainstack)
		1736	{
		1737	struct coro temp;
		1738
		1739	if (!(coro->flags & CF_RUNNING))
		1740	{
		1741	PUTBACK;
		1742	save_perl (aTHX_ &temp);
		1743	load_perl (aTHX_ coro);
		1744	}
		1745
		1746	{
		1747	dSP;
		1748	ENTER;
		1749	SAVETMPS;
		1750	PUTBACK;
		1751	PUSHSTACK;
		1752	PUSHMARK (SP);
		1753
		1754	if (ix)
		1755	eval_sv (coderef, 0);
		1756	else
		1757	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1758
		1759	POPSTACK;
		1760	SPAGAIN;
		1761	FREETMPS;
		1762	LEAVE;
		1763	PUTBACK;
		1764	}
		1765
		1766	if (!(coro->flags & CF_RUNNING))
		1767	{
		1768	save_perl (aTHX_ coro);
		1769	load_perl (aTHX_ &temp);
		1770	SPAGAIN;
		1771	}
		1772	}
		1773	}
		1774
		1775	SV *
		1776	is_ready (Coro::State coro)
		1777	PROTOTYPE: $
		1778	ALIAS:
		1779	is_ready = CF_READY
		1780	is_running = CF_RUNNING
		1781	is_new = CF_NEW
		1782	is_destroyed = CF_DESTROYED
		1783	CODE:
		1784	RETVAL = boolSV (coro->flags & ix);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	void
		1789	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1790
		1791	SV *
		1792	has_stack (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = boolSV (!!coro->cctx);
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	int
		1800	is_traced (Coro::State coro)
		1801	PROTOTYPE: $
		1802	CODE:
		1803	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1804	OUTPUT:
		1805	RETVAL
		1806
		1807	IV
		1808	rss (Coro::State coro)
		1809	PROTOTYPE: $
		1810	ALIAS:
		1811	usecount = 1
		1812	CODE:
		1813	switch (ix)
		1814	{
		1815	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1816	case 1: RETVAL = coro->usecount; break;
		1817	}
		1818	OUTPUT:
		1819	RETVAL
		1820
		1821	void
		1822	force_cctx ()
		1823	CODE:
		1824	struct coro *coro = SvSTATE (coro_current);
		1825	coro->cctx->idle_sp = 0;
		1826
1099	MODULE = Coro::State PACKAGE = Coro	1827	MODULE = Coro::State PACKAGE = Coro
1100		1828
1101	BOOT:	1829	BOOT:
1102	{	1830	{
1103	int i;	1831	int i;
1104		1832
		1833	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1834	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1835	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1836
		1837	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1838	SvREADONLY_on (coro_current);
		1839
1105	coro_stash = gv_stashpv ("Coro", TRUE);	1840	coro_stash = gv_stashpv ("Coro", TRUE);
1106		1841
1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1842	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1843	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1844	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1845	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1846	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1847	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1113		1848
1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1116
1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1849	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1118	coro_ready[i] = newAV ();	1850	coro_ready[i] = newAV ();
1119		1851
1120	{	1852	{
1121	SV *sv = perl_get_sv("Coro::API", 1);	1853	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1854	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1122		1855
1123	coroapi.schedule = api_schedule;	1856	coroapi.schedule = api_schedule;
1124	coroapi.cede = api_cede;	1857	coroapi.cede = api_cede;
		1858	coroapi.cede_notself = api_cede_notself;
1125	coroapi.ready = api_ready;	1859	coroapi.ready = api_ready;
		1860	coroapi.is_ready = api_is_ready;
1126	coroapi.nready = &coro_nready;	1861	coroapi.nready = &coro_nready;
1127	coroapi.current = coro_current;	1862	coroapi.current = coro_current;
1128		1863
1129	GCoroAPI = &coroapi;	1864	GCoroAPI = &coroapi;
1130	sv_setiv (sv, (IV)&coroapi);	1865	sv_setiv (sv, (IV)&coroapi);
1131	SvREADONLY_on (sv);	1866	SvREADONLY_on (sv);
1132	}	1867	}
1133	}	1868	}
		1869
		1870	void
		1871	_set_current (SV *current)
		1872	PROTOTYPE: $
		1873	CODE:
		1874	SvREFCNT_dec (SvRV (coro_current));
		1875	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1134		1876
1135	int	1877	int
1136	prio (Coro::State coro, int newprio = 0)	1878	prio (Coro::State coro, int newprio = 0)
1137	ALIAS:	1879	ALIAS:
1138	nice = 1	1880	nice = 1
…		…
1141	RETVAL = coro->prio;	1883	RETVAL = coro->prio;
1142		1884
1143	if (items > 1)	1885	if (items > 1)
1144	{	1886	{
1145	if (ix)	1887	if (ix)
1146	newprio += coro->prio;	1888	newprio = coro->prio - newprio;
1147		1889
1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1890	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1891	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1150		1892
1151	coro->prio = newprio;	1893	coro->prio = newprio;
1152	}	1894	}
1153	}	1895	}
		1896	OUTPUT:
		1897	RETVAL
1154		1898
1155	void	1899	SV *
1156	ready (SV *self)	1900	ready (SV *self)
1157	PROTOTYPE: $	1901	PROTOTYPE: $
1158	CODE:	1902	CODE:
1159	api_ready (self);	1903	RETVAL = boolSV (api_ready (self));
		1904	OUTPUT:
		1905	RETVAL
1160		1906
1161	int	1907	int
1162	nready (...)	1908	nready (...)
1163	PROTOTYPE:	1909	PROTOTYPE:
1164	CODE:	1910	CODE:
1165	RETVAL = coro_nready;	1911	RETVAL = coro_nready;
1166	OUTPUT:	1912	OUTPUT:
1167	RETVAL	1913	RETVAL
1168		1914
		1915	void
		1916	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1917	PROTOTYPE: $;$
		1918	CODE:
		1919	SvREFCNT_dec (self->throw);
		1920	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1921
		1922	void
		1923	swap_defsv (Coro::State self)
		1924	PROTOTYPE: $
		1925	ALIAS:
		1926	swap_defav = 1
		1927	CODE:
		1928	if (!self->slot)
		1929	croak ("cannot swap state with coroutine that has no saved state");
		1930	else
		1931	{
		1932	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1933	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
		1934
		1935	SV tmp = src; src = dst; *dst = tmp;
		1936	}
		1937
		1938	# for async_pool speedup
		1939	void
		1940	_pool_1 (SV *cb)
		1941	CODE:
		1942	{
		1943	struct coro *coro = SvSTATE (coro_current);
		1944	HV hv = (HV )SvRV (coro_current);
		1945	AV *defav = GvAV (PL_defgv);
		1946	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1947	AV *invoke_av;
		1948	int i, len;
		1949
		1950	if (!invoke)
		1951	{
		1952	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1953	croak ("\3async_pool terminate\2\n");
		1954	}
		1955
		1956	SvREFCNT_dec (coro->saved_deffh);
		1957	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1958
		1959	hv_store (hv, "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1961
		1962	invoke_av = (AV *)SvRV (invoke);
		1963	len = av_len (invoke_av);
		1964
		1965	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1966
		1967	if (len > 0)
		1968	{
		1969	av_fill (defav, len - 1);
		1970	for (i = 0; i < len; ++i)
		1971	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1972	}
		1973
		1974	SvREFCNT_dec (invoke);
		1975	}
		1976
		1977	void
		1978	_pool_2 (SV *cb)
		1979	CODE:
		1980	{
		1981	struct coro *coro = SvSTATE (coro_current);
		1982
		1983	sv_setsv (cb, &PL_sv_undef);
		1984
		1985	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1986	coro->saved_deffh = 0;
		1987
		1988	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1989	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1990	{
		1991	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1992	croak ("\3async_pool terminate\2\n");
		1993	}
		1994
		1995	av_clear (GvAV (PL_defgv));
		1996	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1997	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1998
		1999	coro->prio = 0;
		2000
		2001	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2002	api_trace (coro_current, 0);
		2003
		2004	av_push (av_async_pool, newSVsv (coro_current));
		2005	}
		2006
		2007
1169	MODULE = Coro::State PACKAGE = Coro::AIO	2008	MODULE = Coro::State PACKAGE = Coro::AIO
1170		2009
1171	SV *	2010	SV *
1172	_get_state ()	2011	_get_state ()
1173	CODE:	2012	CODE:
1174	{	2013	{
1175	struct {	2014	struct io_state *data;
1176	int errorno;
1177	int laststype;
1178	int laststatval;
1179	Stat_t statcache;
1180	} data;
1181		2015
		2016	RETVAL = newSV (sizeof (struct io_state));
		2017	data = (struct io_state *)SvPVX (RETVAL);
		2018	SvCUR_set (RETVAL, sizeof (struct io_state));
		2019	SvPOK_only (RETVAL);
		2020
1182	data.errorno = errno;	2021	data->errorno = errno;
1183	data.laststype = PL_laststype;	2022	data->laststype = PL_laststype;
1184	data.laststatval = PL_laststatval;	2023	data->laststatval = PL_laststatval;
1185	data.statcache = PL_statcache;	2024	data->statcache = PL_statcache;
1186
1187	RETVAL = newSVpvn ((char *)&data, sizeof data);
1188	}	2025	}
1189	OUTPUT:	2026	OUTPUT:
1190	RETVAL	2027	RETVAL
1191		2028
1192	void	2029	void
1193	_set_state (char *data_)	2030	_set_state (char *data_)
1194	PROTOTYPE: $	2031	PROTOTYPE: $
1195	CODE:	2032	CODE:
1196	{	2033	{
1197	struct {	2034	struct io_state data = (void )data_;
1198	int errorno;
1199	int laststype;
1200	int laststatval;
1201	Stat_t statcache;
1202	} data = (void )data_;
1203		2035
1204	errno = data->errorno;	2036	errno = data->errorno;
1205	PL_laststype = data->laststype;	2037	PL_laststype = data->laststype;
1206	PL_laststatval = data->laststatval;	2038	PL_laststatval = data->laststatval;
1207	PL_statcache = data->statcache;	2039	PL_statcache = data->statcache;
1208	}	2040	}
		2041

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Comparing Coro/Coro/State.xs (file contents): Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs. Revision 1.231 by root, Thu Apr 24 10:31:59 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs.
Revision 1.231 by root, Thu Apr 24 10:31:59 2008 UTC