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

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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 1.244 by root, Sun Sep 21 18:29:39 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 1.244 by root, Sun Sep 21 18:29:39 2008 UTC