ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC vs.
Revision 1.197 by root, Sat Oct 6 19:25:00 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		37
77	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
79	* and should be unique. */	40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
		87
		88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		89	# undef CORO_STACKGUARD
		90	#endif
		91
		92	#ifndef CORO_STACKGUARD
		93	# define CORO_STACKGUARD 0
		94	#endif
		95
		96	/* prefer perl internal functions over our own? */
		97	#ifndef CORO_PREFER_PERL_FUNCTIONS
		98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
80	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
82		105
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		107
85	#if __GNUC__ >= 3	108	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	# define expect(expr,value) __builtin_expect ((expr),(value))
87	#else	112	#else
88	# define attribute(x)	113	# define attribute(x)
		114	# define BARRIER
		115	# define expect(expr,value) (expr)
89	#endif	116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
90		120
91	#define NOINLINE attribute ((noinline))	121	#define NOINLINE attribute ((noinline))
92		122
93	#include "CoroAPI.h"	123	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		124
97	#ifdef USE_ITHREADS	125	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	126	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	127	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	128	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	129	#else
102	# define LOCK (void)0	130	# define LOCK (void)0
103	# define UNLOCK (void)0	131	# define UNLOCK (void)0
104	#endif	132	#endif
105		133
		134	/* helper storage struct for Coro::AIO */
106	struct io_state	135	struct io_state
107	{	136	{
108	int errorno;	137	int errorno;
109	I32 laststype;	138	I32 laststype;
110	int laststatval;	139	int laststatval;
111	Stat_t statcache;	140	Stat_t statcache;
112	};	141	};
113		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
114	static struct CoroAPI coroapi;	144	static struct CoroAPI coroapi;
115	static AV *main_mainstack; /* used to differentiate between $main and others */	145	static AV *main_mainstack; /* used to differentiate between $main and others */
		146	static JMPENV *main_top_env;
116	static HV *coro_state_stash, *coro_stash;	147	static HV *coro_state_stash, *coro_stash;
117	static SV *coro_mortal; /* will be freed after next transfer */	148	static SV *coro_mortal; /* will be freed after next transfer */
118		149
		150	static GV *irsgv; /* $/ */
		151	static GV *stdoutgv; /* *STDOUT */
		152
		153	/* async_pool helper stuff */
		154	static SV *sv_pool_rss;
		155	static SV *sv_pool_size;
		156	static AV *av_async_pool;
		157
119	static struct coro_cctx *cctx_first;	158	static struct coro_cctx *cctx_first;
120	static int cctx_count, cctx_idle;	159	static int cctx_count, cctx_idle;
		160
		161	enum {
		162	CC_MAPPED = 0x01,
		163	CC_NOREUSE = 0x02, /* throw this away after tracing */
		164	CC_TRACE = 0x04,
		165	CC_TRACE_SUB = 0x08, /* trace sub calls */
		166	CC_TRACE_LINE = 0x10, /* trace each statement */
		167	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		168	};
121		169
122	/* this is a structure representing a c-level coroutine */	170	/* this is a structure representing a c-level coroutine */
123	typedef struct coro_cctx {	171	typedef struct coro_cctx {
124	struct coro_cctx *next;	172	struct coro_cctx *next;
125		173
126	/* the stack */	174	/* the stack */
127	void *sptr;	175	void *sptr;
128	long ssize; /* positive == mmap, otherwise malloc */	176	size_t ssize;
129		177
130	/* cpu state */	178	/* cpu state */
131	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	179	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		180	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
132	JMPENV *top_env;	181	JMPENV *top_env;
133	coro_context cctx;	182	coro_context cctx;
134		183
135	int inuse;
136
137	#if USE_VALGRIND	184	#if CORO_USE_VALGRIND
138	int valgrind_id;	185	int valgrind_id;
139	#endif	186	#endif
		187	unsigned char flags;
140	} coro_cctx;	188	} coro_cctx;
141		189
142	enum {	190	enum {
143	CF_RUNNING = 0x0001, /* coroutine is running */	191	CF_RUNNING = 0x0001, /* coroutine is running */
144	CF_READY = 0x0002, /* coroutine is ready */	192	CF_READY = 0x0002, /* coroutine is ready */
145	CF_NEW = 0x0004, /* ahs never been switched to */	193	CF_NEW = 0x0004, /* has never been switched to */
		194	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
146	};	195	};
147		196
148	/* this is a structure representing a perl-level coroutine */	197	/* this is a structure representing a perl-level coroutine */
149	struct coro {	198	struct coro {
150	/* the c coroutine allocated to this perl coroutine, if any */	199	/* the c coroutine allocated to this perl coroutine, if any */
151	coro_cctx *cctx;	200	coro_cctx *cctx;
152		201
153	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
154	AV *args;	203	AV *args;
155	int refcnt;	204	int refcnt;
156	int flags;	205	int flags; /* CF_ flags */
157		206
158	/* optionally saved, might be zero */	207	/* optionally saved, might be zero */
159	AV *defav;	208	AV *defav; /* @_ */
160	SV *defsv;	209	SV *defsv; /* $_ */
161	SV *errsv;	210	SV *errsv; /* $@ */
		211	SV *deffh; /* default filehandle */
		212	SV *irssv; /* $/ */
		213	SV *irssv_sv; /* real $/ cache */
162		214
163	#define VAR(name,type) type name;	215	#define VAR(name,type) type name;
164	# include "state.h"	216	# include "state.h"
165	#undef VAR	217	#undef VAR
166		218
		219	/* statistics */
		220	int usecount; /* number of transfers to this coro */
		221
167	/* coro process data */	222	/* coro process data */
168	int prio;	223	int prio;
		224	SV *throw;
		225
		226	/* async_pool */
		227	SV *saved_deffh;
		228
		229	/* linked list */
		230	struct coro *next, *prev;
		231	HV *hv; /* the perl hash associated with this coro, if any */
169	};	232	};
170		233
171	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
172	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
173		236
		237	/** Coro ********************************************************************/
		238
		239	#define PRIO_MAX 3
		240	#define PRIO_HIGH 1
		241	#define PRIO_NORMAL 0
		242	#define PRIO_LOW -1
		243	#define PRIO_IDLE -3
		244	#define PRIO_MIN -4
		245
		246	/* for Coro.pm */
		247	static SV *coro_current;
		248	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		249	static int coro_nready;
		250	static struct coro *coro_first;
		251
		252	/** lowlevel stuff **********************************************************/
		253
174	static AV *	254	static AV *
175	coro_clone_padlist (CV *cv)	255	coro_clone_padlist (pTHX_ CV *cv)
176	{	256	{
177	AV *padlist = CvPADLIST (cv);	257	AV *padlist = CvPADLIST (cv);
178	AV *newpadlist, *newpad;	258	AV *newpadlist, *newpad;
179		259
180	newpadlist = newAV ();	260	newpadlist = newAV ();
…		…
192		272
193	return newpadlist;	273	return newpadlist;
194	}	274	}
195		275
196	static void	276	static void
197	free_padlist (AV *padlist)	277	free_padlist (pTHX_ AV *padlist)
198	{	278	{
199	/* may be during global destruction */	279	/* may be during global destruction */
200	if (SvREFCNT (padlist))	280	if (SvREFCNT (padlist))
201	{	281	{
202	I32 i = AvFILLp (padlist);	282	I32 i = AvFILLp (padlist);
…		…
223	AV *padlist;	303	AV *padlist;
224	AV *av = (AV *)mg->mg_obj;	304	AV *av = (AV *)mg->mg_obj;
225		305
226	/* casting is fun. */	306	/* casting is fun. */
227	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	307	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
228	free_padlist (padlist);	308	free_padlist (aTHX_ padlist);
229		309
230	SvREFCNT_dec (av);	310	SvREFCNT_dec (av);
231		311
232	return 0;	312	return 0;
233	}	313	}
…		…
241	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
242	? SvMAGIC (cv) \	322	? SvMAGIC (cv) \
243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
244	: 0	324	: 0
245		325
		326	static struct coro *
		327	SvSTATE_ (pTHX_ SV *coro)
		328	{
		329	HV *stash;
		330	MAGIC *mg;
		331
		332	if (SvROK (coro))
		333	coro = SvRV (coro);
		334
		335	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		336	croak ("Coro::State object required");
		337
		338	stash = SvSTASH (coro);
		339	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		340	{
		341	/* very slow, but rare, check */
		342	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		343	croak ("Coro::State object required");
		344	}
		345
		346	mg = CORO_MAGIC (coro);
		347	return (struct coro *)mg->mg_ptr;
		348	}
		349
		350	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		351
246	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
247	static void	353	static void
248	get_padlist (CV *cv)	354	get_padlist (pTHX_ CV *cv)
249	{	355	{
250	MAGIC *mg = CORO_MAGIC (cv);	356	MAGIC *mg = CORO_MAGIC (cv);
251	AV *av;	357	AV *av;
252		358
253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
255	else	361	else
256	{	362	{
257	#if 0	363	#if CORO_PREFER_PERL_FUNCTIONS
258	/* this is probably cleaner, but also slower? */	364	/* this is probably cleaner, but also slower? */
259	CV *cp = Perl_cv_clone (cv);	365	CV *cp = Perl_cv_clone (cv);
260	CvPADLIST (cv) = CvPADLIST (cp);	366	CvPADLIST (cv) = CvPADLIST (cp);
261	CvPADLIST (cp) = 0;	367	CvPADLIST (cp) = 0;
262	SvREFCNT_dec (cp);	368	SvREFCNT_dec (cp);
263	#else	369	#else
264	CvPADLIST (cv) = coro_clone_padlist (cv);	370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
265	#endif	371	#endif
266	}	372	}
267	}	373	}
268		374
269	static void	375	static void
270	put_padlist (CV *cv)	376	put_padlist (pTHX_ CV *cv)
271	{	377	{
272	MAGIC *mg = CORO_MAGIC (cv);	378	MAGIC *mg = CORO_MAGIC (cv);
273	AV *av;	379	AV *av;
274		380
275	if (!mg)	381	if (expect_false (!mg))
276	{	382	{
277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
279	mg->mg_virtual = &vtbl_coro;	385	mg->mg_virtual = &vtbl_coro;
280	mg->mg_obj = (SV *)newAV ();	386	mg->mg_obj = (SV *)newAV ();
281	}	387	}
282		388
283	av = (AV *)mg->mg_obj;	389	av = (AV *)mg->mg_obj;
284		390
285	if (AvFILLp (av) >= AvMAX (av))	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
286	av_extend (av, AvMAX (av) + 1);	392	av_extend (av, AvMAX (av) + 1);
287		393
288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
289	}	395	}
290		396
291	#define SB do {	397	/** load & save, init *******************************************************/
292	#define SE } while (0)
293		398
294	#define LOAD(state) load_state ((state))
295	#define SAVE(state,flags) save_state ((state),(flags))
296
297	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
298
299	static void	399	static void
300	load_state (Coro__State c)	400	load_perl (pTHX_ Coro__State c)
301	{	401	{
302	#define VAR(name,type) PL_ ## name = c->name;	402	#define VAR(name,type) PL_ ## name = c->name;
303	# include "state.h"	403	# include "state.h"
304	#undef VAR	404	#undef VAR
305		405
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	406	GvSV (PL_defgv) = c->defsv;
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	407	GvAV (PL_defgv) = c->defav;
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	408	GvSV (PL_errgv) = c->errsv;
		409	GvSV (irsgv) = c->irssv_sv;
309		410
310	{	411	{
311	dSP;	412	dSP;
312	CV *cv;	413	CV *cv;
313		414
314	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
316	{	417	{
317	put_padlist (cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
318	CvDEPTH (cv) = PTR2IV (POPs);	419	CvDEPTH (cv) = PTR2IV (POPs);
319	CvPADLIST (cv) = (AV *)POPs;	420	CvPADLIST (cv) = (AV *)POPs;
320	}	421	}
321		422
322	PUTBACK;	423	PUTBACK;
323	}	424	}
324	}	425	}
325		426
326	static void	427	static void
327	save_state (Coro__State c, int flags)	428	save_perl (pTHX_ Coro__State c)
328	{	429	{
329	{	430	{
330	dSP;	431	dSP;
331	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
332	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
…		…
335	/*	436	/*
336	* the worst thing you can imagine happens first - we have to save	437	* the worst thing you can imagine happens first - we have to save
337	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
338	*/	439	*/
339		440
340	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
341	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
342	for (;;)	443	for (;;)
343	{	444	{
344	while (cxix >= 0)	445	while (expect_true (cxix >= 0))
345	{	446	{
346	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
347		448
348	if (CxTYPE (cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
349	{	450	{
350	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
351		452
352	if (CvDEPTH (cv))	453	if (expect_true (CvDEPTH (cv)))
353	{	454	{
354	EXTEND (SP, 3);	455	EXTEND (SP, 3);
355
356	PUSHs ((SV *)CvPADLIST (cv));	456	PUSHs ((SV *)CvPADLIST (cv));
357	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
358	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
359		459
360	CvDEPTH (cv) = 0;	460	CvDEPTH (cv) = 0;
361	get_padlist (cv);	461	get_padlist (aTHX_ cv);
362	}	462	}
363	}	463	}
364	#ifdef CXt_FORMAT
365	else if (CxTYPE (cx) == CXt_FORMAT)
366	{
367	/* I never used formats, so how should I know how these are implemented? */
368	/* my bold guess is as a simple, plain sub... */
369	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
370	}
371	#endif
372	}	464	}
373		465
374	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
375	break;	467	break;
376		468
377	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
378	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
379	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
380	}	472	}
381		473
382	PUTBACK;	474	PUTBACK;
383	}	475	}
384		476
385	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
386	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
387	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
		480	c->irssv_sv = GvSV (irsgv);
388		481
389	#define VAR(name,type)c->name = PL_ ## name;	482	#define VAR(name,type)c->name = PL_ ## name;
390	# include "state.h"	483	# include "state.h"
391	#undef VAR	484	#undef VAR
392	}	485	}
…		…
395	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
396	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
397	* on the (sometimes correct) assumption that coroutines do	490	* on the (sometimes correct) assumption that coroutines do
398	* not usually need a lot of stackspace.	491	* not usually need a lot of stackspace.
399	*/	492	*/
		493	#if CORO_PREFER_PERL_FUNCTIONS
		494	# define coro_init_stacks init_stacks
		495	#else
400	static void	496	static void
401	coro_init_stacks ()	497	coro_init_stacks (pTHX)
402	{	498	{
403	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	499	PL_curstackinfo = new_stackinfo(64, 6);
404	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
405	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
406	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
407		503
408	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
409	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
410	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
411		507
412	New(50,PL_tmps_stack,128,SV*);	508	New(50,PL_tmps_stack,64,SV*);
413	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
414	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
415	PL_tmps_max = 128;	511	PL_tmps_max = 64;
416		512
417	New(54,PL_markstack,32,I32);	513	New(54,PL_markstack,16,I32);
418	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
419	PL_markstack_max = PL_markstack + 32;	515	PL_markstack_max = PL_markstack + 16;
420		516
421	#ifdef SET_MARK_OFFSET	517	#ifdef SET_MARK_OFFSET
422	SET_MARK_OFFSET;	518	SET_MARK_OFFSET;
423	#endif	519	#endif
424		520
425	New(54,PL_scopestack,32,I32);	521	New(54,PL_scopestack,16,I32);
426	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
427	PL_scopestack_max = 32;	523	PL_scopestack_max = 16;
428		524
429	New(54,PL_savestack,64,ANY);	525	New(54,PL_savestack,64,ANY);
430	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
431	PL_savestack_max = 64;	527	PL_savestack_max = 64;
432		528
433	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
434	New(54,PL_retstack,16,OP*);	530	New(54,PL_retstack,4,OP*);
435	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
436	PL_retstack_max = 16;	532	PL_retstack_max = 4;
437	#endif	533	#endif
438	}	534	}
		535	#endif
439		536
440	/*	537	/*
441	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
442	*/	539	*/
443	static void	540	static void
444	coro_destroy_stacks ()	541	coro_destroy_stacks (pTHX)
445	{	542	{
446	if (!IN_DESTRUCT)
447	{
448	/* is this ugly, I ask? */
449	LEAVE_SCOPE (0);
450
451	/* sure it is, but more important: is it correct?? :/ */
452	FREETMPS;
453
454	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
455	}
456
457	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
458	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
459		545
460	while (PL_curstackinfo)	546	while (PL_curstackinfo)
461	{	547	{
462	PERL_SI *p = PL_curstackinfo->si_prev;	548	PERL_SI *p = PL_curstackinfo->si_prev;
463		549
464	{ /*D*//*remove*/
465	dSP;
466	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
467	PUTBACK; /* possibly superfluous */
468	}
469
470	if (!IN_DESTRUCT)	550	if (!IN_DESTRUCT)
471	{
472	dounwind (-1);/*D*//*remove*/
473	SvREFCNT_dec (PL_curstackinfo->si_stack);	551	SvREFCNT_dec (PL_curstackinfo->si_stack);
474	}
475		552
476	Safefree (PL_curstackinfo->si_cxstack);	553	Safefree (PL_curstackinfo->si_cxstack);
477	Safefree (PL_curstackinfo);	554	Safefree (PL_curstackinfo);
478	PL_curstackinfo = p;	555	PL_curstackinfo = p;
479	}	556	}
…		…
485	#if !PERL_VERSION_ATLEAST (5,9,0)	562	#if !PERL_VERSION_ATLEAST (5,9,0)
486	Safefree (PL_retstack);	563	Safefree (PL_retstack);
487	#endif	564	#endif
488	}	565	}
489		566
490	static void	567	static size_t
491	setup_coro (struct coro *coro)	568	coro_rss (pTHX_ struct coro *coro)
		569	{
		570	size_t rss = sizeof (*coro);
		571
		572	if (coro->mainstack)
		573	{
		574	if (coro->flags & CF_RUNNING)
		575	{
		576	#define VAR(name,type)coro->name = PL_ ## name;
		577	# include "state.h"
		578	#undef VAR
		579	}
		580
		581	rss += sizeof (coro->curstackinfo);
		582	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		583	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		584	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		585	rss += coro->tmps_max * sizeof (SV *);
		586	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		587	rss += coro->scopestack_max * sizeof (I32);
		588	rss += coro->savestack_max * sizeof (ANY);
		589
		590	#if !PERL_VERSION_ATLEAST (5,9,0)
		591	rss += coro->retstack_max * sizeof (OP *);
		592	#endif
		593	}
		594
		595	return rss;
		596	}
		597
		598	/** coroutine stack handling ************************************************/
		599
		600	static void
		601	coro_setup (pTHX_ struct coro *coro)
492	{	602	{
493	/*	603	/*
494	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
495	*/	605	*/
496
497	coro_init_stacks ();	606	coro_init_stacks (aTHX);
498		607
		608	PL_runops = RUNOPS_DEFAULT;
499	PL_curcop = &PL_compiling;	609	PL_curcop = &PL_compiling;
500	PL_in_eval = EVAL_NULL;	610	PL_in_eval = EVAL_NULL;
		611	PL_comppad = 0;
501	PL_curpm = 0;	612	PL_curpm = 0;
		613	PL_curpad = 0;
502	PL_localizing = 0;	614	PL_localizing = 0;
503	PL_dirty = 0;	615	PL_dirty = 0;
504	PL_restartop = 0;	616	PL_restartop = 0;
		617
		618	GvSV (PL_defgv) = newSV (0);
		619	GvAV (PL_defgv) = coro->args; coro->args = 0;
		620	GvSV (PL_errgv) = newSV (0);
		621	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		622	PL_rs = newSVsv (GvSV (irsgv));
		623	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
505		624
506	{	625	{
507	dSP;	626	dSP;
508	LOGOP myop;	627	LOGOP myop;
509		628
510	SvREFCNT_dec (GvAV (PL_defgv));
511	GvAV (PL_defgv) = coro->args; coro->args = 0;
512
513	Zero (&myop, 1, LOGOP);	629	Zero (&myop, 1, LOGOP);
514	myop.op_next = Nullop;	630	myop.op_next = Nullop;
515	myop.op_flags = OPf_WANT_VOID;	631	myop.op_flags = OPf_WANT_VOID;
516		632
517	PUSHMARK (SP);	633	PUSHMARK (SP);
518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	634	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
519	PUTBACK;	635	PUTBACK;
520	PL_op = (OP *)&myop;	636	PL_op = (OP *)&myop;
521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	637	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
522	SPAGAIN;	638	SPAGAIN;
523	}	639	}
524		640
525	ENTER; /* necessary e.g. for dounwind */	641	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
526	}	642	}
527		643
528	static void	644	static void
		645	coro_destroy (pTHX_ struct coro *coro)
		646	{
		647	if (!IN_DESTRUCT)
		648	{
		649	/* restore all saved variables and stuff */
		650	LEAVE_SCOPE (0);
		651	assert (PL_tmps_floor == -1);
		652
		653	/* free all temporaries */
		654	FREETMPS;
		655	assert (PL_tmps_ix == -1);
		656
		657	/* unwind all extra stacks */
		658	POPSTACK_TO (PL_mainstack);
		659
		660	/* unwind main stack */
		661	dounwind (-1);
		662	}
		663
		664	SvREFCNT_dec (GvSV (PL_defgv));
		665	SvREFCNT_dec (GvAV (PL_defgv));
		666	SvREFCNT_dec (GvSV (PL_errgv));
		667	SvREFCNT_dec (PL_defoutgv);
		668	SvREFCNT_dec (PL_rs);
		669	SvREFCNT_dec (GvSV (irsgv));
		670
		671	SvREFCNT_dec (coro->saved_deffh);
		672	SvREFCNT_dec (coro->throw);
		673
		674	coro_destroy_stacks (aTHX);
		675	}
		676
		677	static void
529	free_coro_mortal ()	678	free_coro_mortal (pTHX)
530	{	679	{
531	if (coro_mortal)	680	if (expect_true (coro_mortal))
532	{	681	{
533	SvREFCNT_dec (coro_mortal);	682	SvREFCNT_dec (coro_mortal);
534	coro_mortal = 0;	683	coro_mortal = 0;
535	}	684	}
536	}	685	}
537		686
		687	static int
		688	runops_trace (pTHX)
		689	{
		690	COP *oldcop = 0;
		691	int oldcxix = -2;
		692	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		693	coro_cctx *cctx = coro->cctx;
		694
		695	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		696	{
		697	PERL_ASYNC_CHECK ();
		698
		699	if (cctx->flags & CC_TRACE_ALL)
		700	{
		701	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		702	{
		703	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		704	SV **bot, **top;
		705	AV *av = newAV (); /* return values */
		706	SV **cb;
		707	dSP;
		708
		709	GV *gv = CvGV (cx->blk_sub.cv);
		710	SV *fullname = sv_2mortal (newSV (0));
		711	if (isGV (gv))
		712	gv_efullname3 (fullname, gv, 0);
		713
		714	bot = PL_stack_base + cx->blk_oldsp + 1;
		715	top = cx->blk_gimme == G_ARRAY ? SP + 1
		716	: cx->blk_gimme == G_SCALAR ? bot + 1
		717	: bot;
		718
		719	av_extend (av, top - bot);
		720	while (bot < top)
		721	av_push (av, SvREFCNT_inc (*bot++));
		722
		723	PL_runops = RUNOPS_DEFAULT;
		724	ENTER;
		725	SAVETMPS;
		726	EXTEND (SP, 3);
		727	PUSHMARK (SP);
		728	PUSHs (&PL_sv_no);
		729	PUSHs (fullname);
		730	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		731	PUTBACK;
		732	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		733	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		734	SPAGAIN;
		735	FREETMPS;
		736	LEAVE;
		737	PL_runops = runops_trace;
		738	}
		739
		740	if (oldcop != PL_curcop)
		741	{
		742	oldcop = PL_curcop;
		743
		744	if (PL_curcop != &PL_compiling)
		745	{
		746	SV **cb;
		747
		748	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		749	{
		750	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		751
		752	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		753	{
		754	runops_proc_t old_runops = PL_runops;
		755	dSP;
		756	GV *gv = CvGV (cx->blk_sub.cv);
		757	SV *fullname = sv_2mortal (newSV (0));
		758
		759	if (isGV (gv))
		760	gv_efullname3 (fullname, gv, 0);
		761
		762	PL_runops = RUNOPS_DEFAULT;
		763	ENTER;
		764	SAVETMPS;
		765	EXTEND (SP, 3);
		766	PUSHMARK (SP);
		767	PUSHs (&PL_sv_yes);
		768	PUSHs (fullname);
		769	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		770	PUTBACK;
		771	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		772	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		773	SPAGAIN;
		774	FREETMPS;
		775	LEAVE;
		776	PL_runops = runops_trace;
		777	}
		778
		779	oldcxix = cxstack_ix;
		780	}
		781
		782	if (cctx->flags & CC_TRACE_LINE)
		783	{
		784	dSP;
		785
		786	PL_runops = RUNOPS_DEFAULT;
		787	ENTER;
		788	SAVETMPS;
		789	EXTEND (SP, 3);
		790	PL_runops = RUNOPS_DEFAULT;
		791	PUSHMARK (SP);
		792	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		793	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		794	PUTBACK;
		795	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		796	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		797	SPAGAIN;
		798	FREETMPS;
		799	LEAVE;
		800	PL_runops = runops_trace;
		801	}
		802	}
		803	}
		804	}
		805	}
		806
		807	TAINT_NOT;
		808	return 0;
		809	}
		810
538	/* inject a fake call to Coro::State::_cctx_init into the execution */	811	/* inject a fake call to Coro::State::_cctx_init into the execution */
		812	/* _cctx_init should be careful, as it could be called at almost any time */
		813	/* during execution of a perl program */
539	static void NOINLINE	814	static void NOINLINE
540	prepare_cctx (coro_cctx *cctx)	815	prepare_cctx (pTHX_ coro_cctx *cctx)
541	{	816	{
542	dSP;	817	dSP;
543	LOGOP myop;	818	LOGOP myop;
		819
		820	PL_top_env = &PL_start_env;
		821
		822	if (cctx->flags & CC_TRACE)
		823	PL_runops = runops_trace;
544		824
545	Zero (&myop, 1, LOGOP);	825	Zero (&myop, 1, LOGOP);
546	myop.op_next = PL_op;	826	myop.op_next = PL_op;
547	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	827	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
548		828
…		…
554	PL_op = (OP *)&myop;	834	PL_op = (OP *)&myop;
555	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	835	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
556	SPAGAIN;	836	SPAGAIN;
557	}	837	}
558		838
		839	/*
		840	* this is a _very_ stripped down perl interpreter ;)
		841	*/
559	static void	842	static void
560	coro_run (void *arg)	843	coro_run (void *arg)
561	{	844	{
		845	dTHX;
		846
562	/* coro_run is the alternative tail of transfer(), so unlock here. */	847	/* coro_run is the alternative tail of transfer(), so unlock here. */
563	UNLOCK;	848	UNLOCK;
564		849
565	/*	850	/* we now skip the entersub that lead to transfer() */
566	* this is a _very_ stripped down perl interpreter ;)	851	PL_op = PL_op->op_next;
567	*/
568	PL_top_env = &PL_start_env;
569		852
570	/* inject call to cctx_init */	853	/* inject a fake subroutine call to cctx_init */
571	prepare_cctx ((coro_cctx *)arg);	854	prepare_cctx (aTHX_ (coro_cctx *)arg);
572		855
573	/* somebody will hit me for both perl_run and PL_restartop */	856	/* somebody or something will hit me for both perl_run and PL_restartop */
574	PL_restartop = PL_op;	857	PL_restartop = PL_op;
575	perl_run (PL_curinterp);	858	perl_run (PL_curinterp);
576		859
577	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	860	/*
578	abort ();	861	* If perl-run returns we assume exit() was being called or the coro
		862	* fell off the end, which seems to be the only valid (non-bug)
		863	* reason for perl_run to return. We try to exit by jumping to the
		864	* bootstrap-time "top" top_env, as we cannot restore the "main"
		865	* coroutine as Coro has no such concept
		866	*/
		867	PL_top_env = main_top_env;
		868	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
579	}	869	}
580		870
581	static coro_cctx *	871	static coro_cctx *
582	cctx_new ()	872	cctx_new ()
583	{	873	{
584	coro_cctx *cctx;	874	coro_cctx *cctx;
		875	void *stack_start;
		876	size_t stack_size;
585		877
586	++cctx_count;	878	++cctx_count;
587		879
588	New (0, cctx, 1, coro_cctx);	880	Newz (0, cctx, 1, coro_cctx);
589		881
590	#if HAVE_MMAP	882	#if HAVE_MMAP
591		883
592	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	884	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
593	/* mmap supposedly does allocate-on-write for us */	885	/* mmap supposedly does allocate-on-write for us */
594	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	886	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
595		887
596	if (cctx->sptr == (void *)-1)	888	if (cctx->sptr != (void *)-1)
597	{
598	perror ("FATAL: unable to mmap stack for coroutine");
599	_exit (EXIT_FAILURE);
600	}	889	{
601
602	# if STACKGUARD	890	# if CORO_STACKGUARD
603	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	891	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
604	# endif	892	# endif
		893	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		894	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		895	cctx->flags |= CC_MAPPED;
		896	}
		897	else
		898	#endif
		899	{
		900	cctx->ssize = coro_stacksize * (long)sizeof (long);
		901	New (0, cctx->sptr, coro_stacksize, long);
605		902
606	#else
607
608	cctx->ssize = STACKSIZE * (long)sizeof (long);
609	New (0, cctx->sptr, STACKSIZE, long);
610
611	if (!cctx->sptr)	903	if (!cctx->sptr)
612	{	904	{
613	perror ("FATAL: unable to malloc stack for coroutine");	905	perror ("FATAL: unable to allocate stack for coroutine");
614	_exit (EXIT_FAILURE);	906	_exit (EXIT_FAILURE);
615	}	907	}
616		908
617	#endif	909	stack_start = cctx->sptr;
		910	stack_size = cctx->ssize;
		911	}
618		912
619	#if USE_VALGRIND	913	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
620	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
621	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
622	cctx->ssize + (char *)cctx->sptr
623	);
624	#endif
625
626	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	914	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
627		915
628	return cctx;	916	return cctx;
629	}	917	}
630		918
631	static void	919	static void
…		…
634	if (!cctx)	922	if (!cctx)
635	return;	923	return;
636		924
637	--cctx_count;	925	--cctx_count;
638		926
639	#if USE_VALGRIND	927	#if CORO_USE_VALGRIND
640	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	928	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
641	#endif	929	#endif
642		930
643	#if HAVE_MMAP	931	#if HAVE_MMAP
		932	if (cctx->flags & CC_MAPPED)
644	munmap (cctx->sptr, cctx->ssize);	933	munmap (cctx->sptr, cctx->ssize);
645	#else	934	else
		935	#endif
646	Safefree (cctx->sptr);	936	Safefree (cctx->sptr);
647	#endif
648		937
649	Safefree (cctx);	938	Safefree (cctx);
650	}	939	}
651		940
		941	/* wether this cctx should be destructed */
		942	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		943
652	static coro_cctx *	944	static coro_cctx *
653	cctx_get ()	945	cctx_get (pTHX)
654	{	946	{
655	coro_cctx *cctx;	947	while (expect_true (cctx_first))
656
657	if (cctx_first)
658	{	948	{
659	cctx = cctx_first;	949	coro_cctx *cctx = cctx_first;
660	cctx_first = cctx->next;	950	cctx_first = cctx->next;
661	--cctx_idle;	951	--cctx_idle;
662	}	952
663	else	953	if (expect_true (!CCTX_EXPIRED (cctx)))
664	{	954	return cctx;
665	cctx = cctx_new ();	955
666	PL_op = PL_op->op_next;	956	cctx_destroy (cctx);
667	}	957	}
668		958
669	return cctx;	959	return cctx_new ();
670	}	960	}
671		961
672	static void	962	static void
673	cctx_put (coro_cctx *cctx)	963	cctx_put (coro_cctx *cctx)
674	{	964	{
675	/* free another cctx if overlimit */	965	/* free another cctx if overlimit */
676	if (cctx_idle >= MAX_IDLE_CCTX)	966	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
677	{	967	{
678	coro_cctx *first = cctx_first;	968	coro_cctx *first = cctx_first;
679	cctx_first = first->next;	969	cctx_first = first->next;
680	--cctx_idle;	970	--cctx_idle;
681		971
682	assert (!first->inuse);
683	cctx_destroy (first);	972	cctx_destroy (first);
684	}	973	}
685		974
686	++cctx_idle;	975	++cctx_idle;
687	cctx->next = cctx_first;	976	cctx->next = cctx_first;
688	cctx_first = cctx;	977	cctx_first = cctx;
689	}	978	}
690		979
691	/* never call directly, always through the coro_state_transfer global variable */	980	/** coroutine switching *****************************************************/
		981
		982	static void
		983	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		984	{
		985	if (expect_true (prev != next))
		986	{
		987	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		988	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		989
		990	if (expect_false (next->flags & CF_RUNNING))
		991	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		992
		993	if (expect_false (next->flags & CF_DESTROYED))
		994	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		995
		996	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		997	croak ("Coro::State::transfer called while parsing, but this is not supported");
		998	}
		999	}
		1000
		1001	/* always use the TRANSFER macro */
692	static void NOINLINE	1002	static void NOINLINE
693	transfer (struct coro *prev, struct coro *next, int flags)	1003	transfer (pTHX_ struct coro *prev, struct coro *next)
694	{	1004	{
695	dSTACKLEVEL;	1005	dSTACKLEVEL;
696		1006
697	/* sometimes transfer is only called to set idle_sp */	1007	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	1008	if (expect_false (!next))
		1009	{
699	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1010	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1011	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1012	}
700	else if (prev != next)	1013	else if (expect_true (prev != next))
701	{	1014	{
702	coro_cctx *prev__cctx;	1015	coro_cctx *prev__cctx;
703		1016
704	if (prev->flags & CF_NEW)	1017	if (expect_false (prev->flags & CF_NEW))
705	{	1018	{
706	/* create a new empty context */	1019	/* create a new empty context */
707	Newz (0, prev->cctx, 1, coro_cctx);	1020	Newz (0, prev->cctx, 1, coro_cctx);
708	prev->cctx->inuse = 1;
709	prev->flags &= ~CF_NEW;	1021	prev->flags &= ~CF_NEW;
710	prev->flags |= CF_RUNNING;	1022	prev->flags |= CF_RUNNING;
711	}	1023	}
712		1024
713	/*TODO: must not croak here */
714	if (!prev->flags & CF_RUNNING)
715	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
716
717	if (next->flags & CF_RUNNING)
718	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
719
720	prev->flags &= ~CF_RUNNING;	1025	prev->flags &= ~CF_RUNNING;
721	next->flags |= CF_RUNNING;	1026	next->flags |= CF_RUNNING;
722		1027
723	LOCK;	1028	LOCK;
724		1029
725	if (next->flags & CF_NEW)	1030	if (expect_false (next->flags & CF_NEW))
726	{	1031	{
727	/* need to start coroutine */	1032	/* need to start coroutine */
728	next->flags &= ~CF_NEW;	1033	next->flags &= ~CF_NEW;
729	/* first get rid of the old state */	1034	/* first get rid of the old state */
730	SAVE (prev, -1);	1035	save_perl (aTHX_ prev);
731	/* setup coroutine call */	1036	/* setup coroutine call */
732	setup_coro (next);	1037	coro_setup (aTHX_ next);
733	/* need a new stack */
734	assert (!next->stack);
735	}	1038	}
736	else	1039	else
737	{	1040	{
738	/* coroutine already started */	1041	/* coroutine already started */
739	SAVE (prev, flags);	1042	save_perl (aTHX_ prev);
740	LOAD (next);	1043	load_perl (aTHX_ next);
741	}	1044	}
742		1045
743	prev__cctx = prev->cctx;	1046	prev__cctx = prev->cctx;
744		1047
745	/* possibly "free" the cctx */	1048	/* possibly "free" the cctx */
746	if (prev__cctx->idle_sp == STACKLEVEL)	1049	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
747	{	1050	{
748	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1051	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
749	assert (PL_top_env == prev__cctx->top_env);	1052	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
750		1053
751	prev->cctx = 0;	1054	prev->cctx = 0;
752		1055
		1056	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1057	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1058	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1059	next->cctx = cctx_get (aTHX);
		1060
753	cctx_put (prev__cctx);	1061	cctx_put (prev__cctx);
754	prev__cctx->inuse = 0;
755	}	1062	}
756		1063
		1064	++next->usecount;
		1065
757	if (!next->cctx)	1066	if (expect_true (!next->cctx))
758	{
759	next->cctx = cctx_get ();	1067	next->cctx = cctx_get (aTHX);
760	assert (!next->cctx->inuse);
761	next->cctx->inuse = 1;
762	}
763		1068
764	if (prev__cctx != next->cctx)	1069	if (expect_false (prev__cctx != next->cctx))
765	{	1070	{
766	prev__cctx->top_env = PL_top_env;	1071	prev__cctx->top_env = PL_top_env;
767	PL_top_env = next->cctx->top_env;	1072	PL_top_env = next->cctx->top_env;
768	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1073	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
769	}	1074	}
770		1075
771	free_coro_mortal ();	1076	free_coro_mortal (aTHX);
772
773	UNLOCK;	1077	UNLOCK;
		1078
		1079	if (expect_false (prev->throw || next->throw))
		1080	{
		1081	struct coro *coro = SvSTATE (coro_current);
		1082
		1083	if (coro->throw)
		1084	{
		1085	SV *exception = coro->throw;
		1086	coro->throw = 0;
		1087	sv_setsv (ERRSV, exception);
		1088	croak (0);
		1089	}
		1090	}
774	}	1091	}
775	}	1092	}
776		1093
777	struct transfer_args	1094	struct transfer_args
778	{	1095	{
779	struct coro *prev, *next;	1096	struct coro *prev, *next;
780	int flags;
781	};	1097	};
782		1098
783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1099	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1100	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
784		1101
		1102	/** high level stuff ********************************************************/
		1103
785	static void	1104	static int
786	coro_state_destroy (struct coro *coro)	1105	coro_state_destroy (pTHX_ struct coro *coro)
787	{	1106	{
788	if (coro->refcnt--)	1107	if (coro->flags & CF_DESTROYED)
789	return;	1108	return 0;
		1109
		1110	coro->flags |= CF_DESTROYED;
		1111
		1112	if (coro->flags & CF_READY)
		1113	{
		1114	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1115	/* alternative: look through all ready queues and remove the coro */
		1116	LOCK;
		1117	--coro_nready;
		1118	UNLOCK;
		1119	}
		1120	else
		1121	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		1122
791	if (coro->mainstack && coro->mainstack != main_mainstack)	1123	if (coro->mainstack && coro->mainstack != main_mainstack)
792	{	1124	{
793	struct coro temp;	1125	struct coro temp;
794		1126
795	if (coro->flags & CF_RUNNING)	1127	if (coro->flags & CF_RUNNING)
796	croak ("FATAL: tried to destroy currently running coroutine");	1128	croak ("FATAL: tried to destroy currently running coroutine");
797		1129
798	SAVE ((&temp), TRANSFER_SAVE_ALL);	1130	save_perl (aTHX_ &temp);
799	LOAD (coro);	1131	load_perl (aTHX_ coro);
800		1132
801	coro_destroy_stacks ();	1133	coro_destroy (aTHX_ coro);
802		1134
803	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1135	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
804		1136
805	coro->mainstack = 0;	1137	coro->mainstack = 0;
806	}	1138	}
807		1139
808	cctx_destroy (coro->cctx);	1140	cctx_destroy (coro->cctx);
809	SvREFCNT_dec (coro->args);	1141	SvREFCNT_dec (coro->args);
810	Safefree (coro);	1142
		1143	if (coro->next) coro->next->prev = coro->prev;
		1144	if (coro->prev) coro->prev->next = coro->next;
		1145	if (coro == coro_first) coro_first = coro->next;
		1146
		1147	return 1;
811	}	1148	}
812		1149
813	static int	1150	static int
814	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1151	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
815	{	1152	{
816	struct coro *coro = (struct coro *)mg->mg_ptr;	1153	struct coro *coro = (struct coro *)mg->mg_ptr;
817	mg->mg_ptr = 0;	1154	mg->mg_ptr = 0;
818		1155
		1156	coro->hv = 0;
		1157
		1158	if (--coro->refcnt < 0)
		1159	{
819	coro_state_destroy (coro);	1160	coro_state_destroy (aTHX_ coro);
		1161	Safefree (coro);
		1162	}
820		1163
821	return 0;	1164	return 0;
822	}	1165	}
823		1166
824	static int	1167	static int
…		…
831	return 0;	1174	return 0;
832	}	1175	}
833		1176
834	static MGVTBL coro_state_vtbl = {	1177	static MGVTBL coro_state_vtbl = {
835	0, 0, 0, 0,	1178	0, 0, 0, 0,
836	coro_state_clear,	1179	coro_state_free,
837	0,	1180	0,
838	#ifdef MGf_DUP	1181	#ifdef MGf_DUP
839	coro_state_dup,	1182	coro_state_dup,
840	#else	1183	#else
841	# define MGf_DUP 0	1184	# define MGf_DUP 0
842	#endif	1185	#endif
843	};	1186	};
844		1187
845	static struct coro *
846	SvSTATE (SV *coro)
847	{
848	HV *stash;
849	MAGIC *mg;
850
851	if (SvROK (coro))
852	coro = SvRV (coro);
853
854	stash = SvSTASH (coro);
855	if (stash != coro_stash && stash != coro_state_stash)
856	{
857	/* very slow, but rare, check */
858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859	croak ("Coro::State object required");
860	}
861
862	mg = SvMAGIC (coro);
863	assert (mg->mg_type == PERL_MAGIC_ext);
864	return (struct coro *)mg->mg_ptr;
865	}
866
867	static void	1188	static void
868	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1189	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
869	{	1190	{
870	ta->prev = SvSTATE (prev);	1191	ta->prev = SvSTATE (prev_sv);
871	ta->next = SvSTATE (next);	1192	ta->next = SvSTATE (next_sv);
872	ta->flags = flags;	1193	TRANSFER_CHECK (*ta);
873	}	1194	}
874		1195
875	static void	1196	static void
876	api_transfer (SV *prev, SV *next, int flags)	1197	api_transfer (SV *prev_sv, SV *next_sv)
877	{	1198	{
		1199	dTHX;
878	struct transfer_args ta;	1200	struct transfer_args ta;
879		1201
880	prepare_transfer (&ta, prev, next, flags);	1202	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	1203	TRANSFER (ta);
882	}	1204	}
883		1205
884	/** Coro ********************************************************************/	1206	/** Coro ********************************************************************/
885		1207
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static SV *coro_current;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	1208	static void
899	coro_enq (SV *coro_sv)	1209	coro_enq (pTHX_ SV *coro_sv)
900	{	1210	{
901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1211	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
902	coro_nready++;
903	}	1212	}
904		1213
905	static SV *	1214	static SV *
906	coro_deq (int min_prio)	1215	coro_deq (pTHX_ int min_prio)
907	{	1216	{
908	int prio = PRIO_MAX - PRIO_MIN;	1217	int prio = PRIO_MAX - PRIO_MIN;
909		1218
910	min_prio -= PRIO_MIN;	1219	min_prio -= PRIO_MIN;
911	if (min_prio < 0)	1220	if (min_prio < 0)
912	min_prio = 0;	1221	min_prio = 0;
913		1222
914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1223	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
915	if (AvFILLp (coro_ready [prio]) >= 0)	1224	if (AvFILLp (coro_ready [prio]) >= 0)
916	{
917	coro_nready--;
918	return av_shift (coro_ready [prio]);	1225	return av_shift (coro_ready [prio]);
919	}
920		1226
921	return 0;	1227	return 0;
922	}	1228	}
923		1229
924	static int	1230	static int
925	api_ready (SV *coro_sv)	1231	api_ready (SV *coro_sv)
926	{	1232	{
		1233	dTHX;
927	struct coro *coro;	1234	struct coro *coro;
928		1235
929	if (SvROK (coro_sv))	1236	if (SvROK (coro_sv))
930	coro_sv = SvRV (coro_sv);	1237	coro_sv = SvRV (coro_sv);
931		1238
932	coro = SvSTATE (coro_sv);	1239	coro = SvSTATE (coro_sv);
933		1240
934	if (coro->flags & CF_READY)	1241	if (coro->flags & CF_READY)
935	return 0;	1242	return 0;
936		1243
937	#if 0 /* this is actually harmless */
938	if (coro->flags & CF_RUNNING)
939	croak ("Coro::ready called on currently running coroutine");
940	#endif
941
942	coro->flags |= CF_READY;	1244	coro->flags |= CF_READY;
943		1245
944	LOCK;	1246	LOCK;
945	coro_enq (SvREFCNT_inc (coro_sv));	1247	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1248	++coro_nready;
946	UNLOCK;	1249	UNLOCK;
947		1250
948	return 1;	1251	return 1;
949	}	1252	}
950		1253
951	static int	1254	static int
952	api_is_ready (SV *coro_sv)	1255	api_is_ready (SV *coro_sv)
953	{	1256	{
		1257	dTHX;
954	return !!SvSTATE (coro_sv)->flags & CF_READY;	1258	return !!(SvSTATE (coro_sv)->flags & CF_READY);
955	}	1259	}
956		1260
957	static void	1261	static void
958	prepare_schedule (struct transfer_args *ta)	1262	prepare_schedule (pTHX_ struct transfer_args *ta)
959	{	1263	{
960	SV *prev, *next;	1264	SV *prev_sv, *next_sv;
961		1265
962	for (;;)	1266	for (;;)
963	{	1267	{
964	LOCK;	1268	LOCK;
965	next = coro_deq (PRIO_MIN);	1269	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1270
		1271	/* nothing to schedule: call the idle handler */
		1272	if (expect_false (!next_sv))
		1273	{
		1274	dSP;
		1275	UNLOCK;
		1276
		1277	ENTER;
		1278	SAVETMPS;
		1279
		1280	PUSHMARK (SP);
		1281	PUTBACK;
		1282	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1283
		1284	FREETMPS;
		1285	LEAVE;
		1286	continue;
		1287	}
		1288
		1289	ta->next = SvSTATE (next_sv);
		1290
		1291	/* cannot transfer to destroyed coros, skip and look for next */
		1292	if (expect_false (ta->next->flags & CF_DESTROYED))
		1293	{
		1294	UNLOCK;
		1295	SvREFCNT_dec (next_sv);
		1296	/* coro_nready is already taken care of by destroy */
		1297	continue;
		1298	}
		1299
		1300	--coro_nready;
966	UNLOCK;	1301	UNLOCK;
967
968	if (next)
969	break;	1302	break;
970
971	{
972	dSP;
973
974	ENTER;
975	SAVETMPS;
976
977	PUSHMARK (SP);
978	PUTBACK;
979	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
980
981	FREETMPS;
982	LEAVE;
983	}	1303	}
984	}
985
986	prev = SvRV (coro_current);
987	SvRV_set (coro_current, next);
988		1304
989	/* free this only after the transfer */	1305	/* free this only after the transfer */
		1306	prev_sv = SvRV (coro_current);
		1307	ta->prev = SvSTATE (prev_sv);
		1308	TRANSFER_CHECK (*ta);
		1309	assert (ta->next->flags & CF_READY);
		1310	ta->next->flags &= ~CF_READY;
		1311	SvRV_set (coro_current, next_sv);
		1312
990	LOCK;	1313	LOCK;
991	free_coro_mortal ();	1314	free_coro_mortal (aTHX);
		1315	coro_mortal = prev_sv;
992	UNLOCK;	1316	UNLOCK;
993	coro_mortal = prev;
994
995	assert (!SvROK(prev));//D
996	assert (!SvROK(next));//D
997
998	ta->prev = SvSTATE (prev);
999	ta->next = SvSTATE (next);
1000	ta->flags = TRANSFER_SAVE_ALL;
1001
1002	assert (ta->flags & CF_READY);
1003	ta->next->flags &= ~CF_READY;
1004	}	1317	}
1005		1318
1006	static void	1319	static void
1007	prepare_cede (struct transfer_args *ta)	1320	prepare_cede (pTHX_ struct transfer_args *ta)
1008	{	1321	{
1009	api_ready (coro_current);	1322	api_ready (coro_current);
1010
1011	prepare_schedule (ta);	1323	prepare_schedule (aTHX_ ta);
		1324	}
		1325
		1326	static int
		1327	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1328	{
		1329	if (coro_nready)
		1330	{
		1331	SV *prev = SvRV (coro_current);
		1332	prepare_schedule (aTHX_ ta);
		1333	api_ready (prev);
		1334	return 1;
		1335	}
		1336	else
		1337	return 0;
1012	}	1338	}
1013		1339
1014	static void	1340	static void
1015	api_schedule (void)	1341	api_schedule (void)
1016	{	1342	{
		1343	dTHX;
1017	struct transfer_args ta;	1344	struct transfer_args ta;
1018		1345
1019	prepare_schedule (&ta);	1346	prepare_schedule (aTHX_ &ta);
1020	TRANSFER (ta);	1347	TRANSFER (ta);
1021	}	1348	}
1022		1349
1023	static void	1350	static int
1024	api_cede (void)	1351	api_cede (void)
1025	{	1352	{
		1353	dTHX;
1026	struct transfer_args ta;	1354	struct transfer_args ta;
1027		1355
1028	prepare_cede (&ta);	1356	prepare_cede (aTHX_ &ta);
		1357
		1358	if (expect_true (ta.prev != ta.next))
		1359	{
1029	TRANSFER (ta);	1360	TRANSFER (ta);
		1361	return 1;
		1362	}
		1363	else
		1364	return 0;
1030	}	1365	}
1031		1366
		1367	static int
		1368	api_cede_notself (void)
		1369	{
		1370	dTHX;
		1371	struct transfer_args ta;
		1372
		1373	if (prepare_cede_notself (aTHX_ &ta))
		1374	{
		1375	TRANSFER (ta);
		1376	return 1;
		1377	}
		1378	else
		1379	return 0;
		1380	}
		1381
		1382	static void
		1383	api_trace (SV *coro_sv, int flags)
		1384	{
		1385	dTHX;
		1386	struct coro *coro = SvSTATE (coro_sv);
		1387
		1388	if (flags & CC_TRACE)
		1389	{
		1390	if (!coro->cctx)
		1391	coro->cctx = cctx_new ();
		1392	else if (!(coro->cctx->flags & CC_TRACE))
		1393	croak ("cannot enable tracing on coroutine with custom stack");
		1394
		1395	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1396	}
		1397	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1398	{
		1399	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1400
		1401	if (coro->flags & CF_RUNNING)
		1402	PL_runops = RUNOPS_DEFAULT;
		1403	else
		1404	coro->runops = RUNOPS_DEFAULT;
		1405	}
		1406	}
		1407
1032	MODULE = Coro::State PACKAGE = Coro::State	1408	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1033		1409
1034	PROTOTYPES: DISABLE	1410	PROTOTYPES: DISABLE
1035		1411
1036	BOOT:	1412	BOOT:
1037	{	1413	{
1038	#ifdef USE_ITHREADS	1414	#ifdef USE_ITHREADS
1039	MUTEX_INIT (&coro_mutex);	1415	MUTEX_INIT (&coro_mutex);
1040	#endif	1416	#endif
1041	BOOT_PAGESIZE;	1417	BOOT_PAGESIZE;
1042		1418
		1419	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1420	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1421
1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1422	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1044		1423
1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1424	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1425	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1426	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1427	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1048		1428
1049	main_mainstack = PL_mainstack;	1429	main_mainstack = PL_mainstack;
		1430	main_top_env = PL_top_env;
		1431
		1432	while (main_top_env->je_prev)
		1433	main_top_env = main_top_env->je_prev;
1050		1434
1051	coroapi.ver = CORO_API_VERSION;	1435	coroapi.ver = CORO_API_VERSION;
1052	coroapi.transfer = api_transfer;	1436	coroapi.transfer = api_transfer;
1053		1437
1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1438	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1061	struct coro *coro;	1445	struct coro *coro;
1062	HV *hv;	1446	HV *hv;
1063	int i;	1447	int i;
1064		1448
1065	Newz (0, coro, 1, struct coro);	1449	Newz (0, coro, 1, struct coro);
1066	coro->args = newAV ();	1450	coro->args = newAV ();
1067	coro->flags = CF_NEW;	1451	coro->flags = CF_NEW;
1068		1452
		1453	if (coro_first) coro_first->prev = coro;
		1454	coro->next = coro_first;
		1455	coro_first = coro;
		1456
1069	hv = newHV ();	1457	coro->hv = hv = newHV ();
1070	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1458	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1071	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1459	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1072		1460
		1461	av_extend (coro->args, items - 1);
1073	for (i = 1; i < items; i++)	1462	for (i = 1; i < items; i++)
1074	av_push (coro->args, newSVsv (ST (i)));	1463	av_push (coro->args, newSVsv (ST (i)));
1075	}	1464	}
1076	OUTPUT:	1465	OUTPUT:
1077	RETVAL	1466	RETVAL
1078		1467
		1468	# these not obviously related functions are all rolled into the same xs
		1469	# function to increase chances that they all will call transfer with the same
		1470	# stack offset
1079	void	1471	void
1080	_set_stacklevel (...)	1472	_set_stacklevel (...)
1081	ALIAS:	1473	ALIAS:
1082	Coro::State::transfer = 1	1474	Coro::State::transfer = 1
1083	Coro::schedule = 2	1475	Coro::schedule = 2
1084	Coro::cede = 3	1476	Coro::cede = 3
		1477	Coro::cede_notself = 4
1085	CODE:	1478	CODE:
1086	{	1479	{
1087	struct transfer_args ta;	1480	struct transfer_args ta;
1088		1481
1089	switch (ix)	1482	switch (ix)
1090	{	1483	{
1091	case 0:	1484	case 0:
1092	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1485	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1093	ta.next = 0;	1486	ta.next = 0;
1094	ta.flags = TRANSFER_SET_STACKLEVEL;
1095	break;	1487	break;
1096		1488
1097	case 1:	1489	case 1:
1098	if (items != 3)	1490	if (items != 2)
1099	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1491	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1100		1492
1101	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1493	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1102	break;	1494	break;
1103		1495
1104	case 2:	1496	case 2:
1105	prepare_schedule (&ta);	1497	prepare_schedule (aTHX_ &ta);
1106	break;	1498	break;
1107		1499
1108	case 3:	1500	case 3:
1109	prepare_cede (&ta);	1501	prepare_cede (aTHX_ &ta);
		1502	break;
		1503
		1504	case 4:
		1505	if (!prepare_cede_notself (aTHX_ &ta))
		1506	XSRETURN_EMPTY;
		1507
1110	break;	1508	break;
1111	}	1509	}
1112		1510
		1511	BARRIER;
1113	TRANSFER (ta);	1512	TRANSFER (ta);
1114	}
1115		1513
1116	void	1514	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1117	_clone_state_from (SV *dst, SV *src)	1515	XSRETURN_YES;
		1516	}
		1517
		1518	bool
		1519	_destroy (SV *coro_sv)
1118	CODE:	1520	CODE:
1119	{	1521	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1120	struct coro *coro_src = SvSTATE (src);	1522	OUTPUT:
1121		1523	RETVAL
1122	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1123
1124	++coro_src->refcnt;
1125	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1126	}
1127		1524
1128	void	1525	void
1129	_exit (code)	1526	_exit (code)
1130	int code	1527	int code
1131	PROTOTYPE: $	1528	PROTOTYPE: $
1132	CODE:	1529	CODE:
1133	_exit (code);	1530	_exit (code);
1134		1531
1135	int	1532	int
		1533	cctx_stacksize (int new_stacksize = 0)
		1534	CODE:
		1535	RETVAL = coro_stacksize;
		1536	if (new_stacksize)
		1537	coro_stacksize = new_stacksize;
		1538	OUTPUT:
		1539	RETVAL
		1540
		1541	int
1136	cctx_count ()	1542	cctx_count ()
1137	CODE:	1543	CODE:
1138	RETVAL = cctx_count;	1544	RETVAL = cctx_count;
1139	OUTPUT:	1545	OUTPUT:
1140	RETVAL	1546	RETVAL
…		…
1144	CODE:	1550	CODE:
1145	RETVAL = cctx_idle;	1551	RETVAL = cctx_idle;
1146	OUTPUT:	1552	OUTPUT:
1147	RETVAL	1553	RETVAL
1148		1554
		1555	void
		1556	list ()
		1557	PPCODE:
		1558	{
		1559	struct coro *coro;
		1560	for (coro = coro_first; coro; coro = coro->next)
		1561	if (coro->hv)
		1562	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1563	}
		1564
		1565	void
		1566	call (Coro::State coro, SV *coderef)
		1567	ALIAS:
		1568	eval = 1
		1569	CODE:
		1570	{
		1571	if (coro->mainstack)
		1572	{
		1573	struct coro temp;
		1574	Zero (&temp, 1, struct coro);
		1575
		1576	if (!(coro->flags & CF_RUNNING))
		1577	{
		1578	save_perl (aTHX_ &temp);
		1579	load_perl (aTHX_ coro);
		1580	}
		1581
		1582	{
		1583	dSP;
		1584	ENTER;
		1585	SAVETMPS;
		1586	PUSHMARK (SP);
		1587	PUTBACK;
		1588	if (ix)
		1589	eval_sv (coderef, 0);
		1590	else
		1591	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1592	SPAGAIN;
		1593	FREETMPS;
		1594	LEAVE;
		1595	PUTBACK;
		1596	}
		1597
		1598	if (!(coro->flags & CF_RUNNING))
		1599	{
		1600	save_perl (aTHX_ coro);
		1601	load_perl (aTHX_ &temp);
		1602	}
		1603	}
		1604	}
		1605
		1606	SV *
		1607	is_ready (Coro::State coro)
		1608	PROTOTYPE: $
		1609	ALIAS:
		1610	is_ready = CF_READY
		1611	is_running = CF_RUNNING
		1612	is_new = CF_NEW
		1613	is_destroyed = CF_DESTROYED
		1614	CODE:
		1615	RETVAL = boolSV (coro->flags & ix);
		1616	OUTPUT:
		1617	RETVAL
		1618
		1619	void
		1620	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1621
		1622	SV *
		1623	has_stack (Coro::State coro)
		1624	PROTOTYPE: $
		1625	CODE:
		1626	RETVAL = boolSV (!!coro->cctx);
		1627	OUTPUT:
		1628	RETVAL
		1629
		1630	int
		1631	is_traced (Coro::State coro)
		1632	PROTOTYPE: $
		1633	CODE:
		1634	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1635	OUTPUT:
		1636	RETVAL
		1637
		1638	IV
		1639	rss (Coro::State coro)
		1640	PROTOTYPE: $
		1641	ALIAS:
		1642	usecount = 1
		1643	CODE:
		1644	switch (ix)
		1645	{
		1646	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1647	case 1: RETVAL = coro->usecount; break;
		1648	}
		1649	OUTPUT:
		1650	RETVAL
		1651
		1652
1149	MODULE = Coro::State PACKAGE = Coro	1653	MODULE = Coro::State PACKAGE = Coro
1150		1654
1151	BOOT:	1655	BOOT:
1152	{	1656	{
1153	int i;	1657	int i;
		1658
		1659	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1660	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1661	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1662
		1663	coro_current = get_sv ("Coro::current", FALSE);
		1664	SvREADONLY_on (coro_current);
1154		1665
1155	coro_stash = gv_stashpv ("Coro", TRUE);	1666	coro_stash = gv_stashpv ("Coro", TRUE);
1156		1667
1157	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1668	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1158	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1669	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1159	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1670	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1160	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1671	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1161	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1672	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1162	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1673	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1163		1674
1164	coro_current = get_sv ("Coro::current", FALSE);
1165	SvREADONLY_on (coro_current);
1166
1167	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1675	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1168	coro_ready[i] = newAV ();	1676	coro_ready[i] = newAV ();
1169		1677
1170	{	1678	{
1171	SV *sv = perl_get_sv("Coro::API", 1);	1679	SV *sv = perl_get_sv("Coro::API", 1);
1172		1680
1173	coroapi.schedule = api_schedule;	1681	coroapi.schedule = api_schedule;
1174	coroapi.cede = api_cede;	1682	coroapi.cede = api_cede;
		1683	coroapi.cede_notself = api_cede_notself;
1175	coroapi.ready = api_ready;	1684	coroapi.ready = api_ready;
1176	coroapi.is_ready = api_is_ready;	1685	coroapi.is_ready = api_is_ready;
1177	coroapi.nready = &coro_nready;	1686	coroapi.nready = &coro_nready;
1178	coroapi.current = coro_current;	1687	coroapi.current = coro_current;
1179		1688
1180	GCoroAPI = &coroapi;	1689	GCoroAPI = &coroapi;
1181	sv_setiv (sv, (IV)&coroapi);	1690	sv_setiv (sv, (IV)&coroapi);
1182	SvREADONLY_on (sv);	1691	SvREADONLY_on (sv);
1183	}	1692	}
1184	}	1693	}
		1694
		1695	void
		1696	_set_current (SV *current)
		1697	PROTOTYPE: $
		1698	CODE:
		1699	SvREFCNT_dec (SvRV (coro_current));
		1700	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1185		1701
1186	int	1702	int
1187	prio (Coro::State coro, int newprio = 0)	1703	prio (Coro::State coro, int newprio = 0)
1188	ALIAS:	1704	ALIAS:
1189	nice = 1	1705	nice = 1
…		…
1192	RETVAL = coro->prio;	1708	RETVAL = coro->prio;
1193		1709
1194	if (items > 1)	1710	if (items > 1)
1195	{	1711	{
1196	if (ix)	1712	if (ix)
1197	newprio += coro->prio;	1713	newprio = coro->prio - newprio;
1198		1714
1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1715	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1716	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1201		1717
1202	coro->prio = newprio;	1718	coro->prio = newprio;
1203	}	1719	}
1204	}	1720	}
		1721	OUTPUT:
		1722	RETVAL
1205		1723
1206	SV *	1724	SV *
1207	ready (SV *self)	1725	ready (SV *self)
1208	PROTOTYPE: $	1726	PROTOTYPE: $
1209	CODE:	1727	CODE:
1210	RETVAL = boolSV (api_ready (self));	1728	RETVAL = boolSV (api_ready (self));
1211	OUTPUT:	1729	OUTPUT:
1212	RETVAL	1730	RETVAL
1213		1731
1214	SV *
1215	is_ready (SV *self)
1216	PROTOTYPE: $
1217	CODE:
1218	RETVAL = boolSV (api_is_ready (self));
1219	OUTPUT:
1220	RETVAL
1221
1222	int	1732	int
1223	nready (...)	1733	nready (...)
1224	PROTOTYPE:	1734	PROTOTYPE:
1225	CODE:	1735	CODE:
1226	RETVAL = coro_nready;	1736	RETVAL = coro_nready;
1227	OUTPUT:	1737	OUTPUT:
1228	RETVAL	1738	RETVAL
1229		1739
1230	void	1740	void
1231	_set_current (SV *current)	1741	throw (Coro::State self, SV *throw = &PL_sv_undef)
1232	PROTOTYPE: $	1742	PROTOTYPE: $;$
		1743	CODE:
		1744	SvREFCNT_dec (self->throw);
		1745	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1746
		1747	# for async_pool speedup
		1748	void
		1749	_pool_1 (SV *cb)
1233	CODE:	1750	CODE:
1234	SvREFCNT_dec (SvRV (coro_current));	1751	{
1235	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1752	struct coro *coro = SvSTATE (coro_current);
		1753	HV *hv = (HV *)SvRV (coro_current);
		1754	AV *defav = GvAV (PL_defgv);
		1755	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1756	AV *invoke_av;
		1757	int i, len;
		1758
		1759	if (!invoke)
		1760	croak ("\3async_pool terminate\2\n");
		1761
		1762	SvREFCNT_dec (coro->saved_deffh);
		1763	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1764
		1765	hv_store (hv, "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1767
		1768	invoke_av = (AV *)SvRV (invoke);
		1769	len = av_len (invoke_av);
		1770
		1771	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1772
		1773	if (len > 0)
		1774	{
		1775	av_fill (defav, len - 1);
		1776	for (i = 0; i < len; ++i)
		1777	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1778	}
		1779
		1780	SvREFCNT_dec (invoke);
		1781	}
		1782
		1783	void
		1784	_pool_2 (SV *cb)
		1785	CODE:
		1786	{
		1787	struct coro *coro = SvSTATE (coro_current);
		1788
		1789	sv_setsv (cb, &PL_sv_undef);
		1790
		1791	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1792	coro->saved_deffh = 0;
		1793
		1794	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1795	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1796	croak ("\3async_pool terminate\2\n");
		1797
		1798	av_clear (GvAV (PL_defgv));
		1799	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1800	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1801
		1802	coro->prio = 0;
		1803
		1804	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1805	api_trace (coro_current, 0);
		1806
		1807	av_push (av_async_pool, newSVsv (coro_current));
		1808	}
		1809
1236		1810
1237	MODULE = Coro::State PACKAGE = Coro::AIO	1811	MODULE = Coro::State PACKAGE = Coro::AIO
1238		1812
1239	SV *	1813	SV *
1240	_get_state ()	1814	_get_state ()

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines