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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.112 by root, Thu Nov 30 20:52:52 2006 UTC vs.
Revision 1.195 by root, Sat Oct 6 00:35:41 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	#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>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
74	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
76	* 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. */
77	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
79		105
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		107
82	#if __GNUC__ >= 3	108	#if __GNUC__ >= 3
83	# 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))
84	#else	112	#else
85	# define attribute(x)	113	# define attribute(x)
		114	# define BARRIER
		115	# define expect(expr,value) (expr)
86	#endif	116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
87		120
88	#define NOINLINE attribute ((noinline))	121	#define NOINLINE attribute ((noinline))
89		122
90	#include "CoroAPI.h"	123	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		124
94	#ifdef USE_ITHREADS	125	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	126	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	127	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	128	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	129	#else
99	# define LOCK (void)0	130	# define LOCK (void)0
100	# define UNLOCK (void)0	131	# define UNLOCK (void)0
101	#endif	132	#endif
102		133
		134	/* helper storage struct for Coro::AIO */
		135	struct io_state
		136	{
		137	int errorno;
		138	I32 laststype;
		139	int laststatval;
		140	Stat_t statcache;
		141	};
		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	144	static struct CoroAPI coroapi;
104	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;
105	static HV *coro_state_stash, *coro_stash;	147	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	148	static SV *coro_mortal; /* will be freed after next transfer */
107		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
108	static struct coro_cctx *cctx_first;	158	static struct coro_cctx *cctx_first;
109	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	};
110		169
111	/* this is a structure representing a c-level coroutine */	170	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	171	typedef struct coro_cctx {
113	struct coro_cctx *next;	172	struct coro_cctx *next;
114		173
115	/* the stack */	174	/* the stack */
116	void *sptr;	175	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	176	size_t ssize;
118		177
119	/* cpu state */	178	/* cpu state */
120	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 */
121	JMPENV *top_env;	181	JMPENV *top_env;
122	coro_context cctx;	182	coro_context cctx;
123		183
124	int inuse;
125
126	#if USE_VALGRIND	184	#if CORO_USE_VALGRIND
127	int valgrind_id;	185	int valgrind_id;
128	#endif	186	#endif
		187	unsigned char flags;
129	} coro_cctx;	188	} coro_cctx;
130		189
131	enum {	190	enum {
132	CF_RUNNING, /* coroutine is running */	191	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	192	CF_READY = 0x0002, /* coroutine is ready */
		193	CF_NEW = 0x0004, /* has never been switched to */
		194	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	195	};
135		196
136	/* this is a structure representing a perl-level coroutine */	197	/* this is a structure representing a perl-level coroutine */
137	struct coro {	198	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	199	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	200	coro_cctx *cctx;
140		201
141	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
142	AV *args;	203	AV *args;
143	int refcnt;	204	int refcnt;
144	int flags;	205	int flags; /* CF_ flags */
145		206
146	/* optionally saved, might be zero */	207	/* optionally saved, might be zero */
147	AV *defav;	208	AV *defav; /* @_ */
148	SV *defsv;	209	SV *defsv; /* $_ */
149	SV *errsv;	210	SV *errsv; /* $@ */
		211	SV *deffh; /* default filehandle */
		212	SV *irssv; /* $/ */
		213	SV *irssv_sv; /* real $/ cache */
150		214
151	#define VAR(name,type) type name;	215	#define VAR(name,type) type name;
152	# include "state.h"	216	# include "state.h"
153	#undef VAR	217	#undef VAR
154		218
		219	/* statistics */
		220	int usecount; /* number of transfers to this coro */
		221
155	/* coro process data */	222	/* coro process data */
156	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 */
157	};	232	};
158		233
159	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
161		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
162	static AV *	254	static AV *
163	coro_clone_padlist (CV *cv)	255	coro_clone_padlist (pTHX_ CV *cv)
164	{	256	{
165	AV *padlist = CvPADLIST (cv);	257	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	258	AV *newpadlist, *newpad;
167		259
168	newpadlist = newAV ();	260	newpadlist = newAV ();
…		…
180		272
181	return newpadlist;	273	return newpadlist;
182	}	274	}
183		275
184	static void	276	static void
185	free_padlist (AV *padlist)	277	free_padlist (pTHX_ AV *padlist)
186	{	278	{
187	/* may be during global destruction */	279	/* may be during global destruction */
188	if (SvREFCNT (padlist))	280	if (SvREFCNT (padlist))
189	{	281	{
190	I32 i = AvFILLp (padlist);	282	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	303	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	304	AV *av = (AV *)mg->mg_obj;
213		305
214	/* casting is fun. */	306	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	307	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (padlist);	308	free_padlist (aTHX_ padlist);
217		309
218	SvREFCNT_dec (av);	310	SvREFCNT_dec (av);
219		311
220	return 0;	312	return 0;
221	}	313	}
…		…
229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230	? SvMAGIC (cv) \	322	? SvMAGIC (cv) \
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	324	: 0
233		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
234	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
235	static void	353	static void
236	get_padlist (CV *cv)	354	get_padlist (pTHX_ CV *cv)
237	{	355	{
238	MAGIC *mg = CORO_MAGIC (cv);	356	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	357	AV *av;
240		358
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	361	else
244	{	362	{
245	#if 0	363	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	364	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	365	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	366	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	367	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	368	SvREFCNT_dec (cp);
251	#else	369	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	371	#endif
254	}	372	}
255	}	373	}
256		374
257	static void	375	static void
258	put_padlist (CV *cv)	376	put_padlist (pTHX_ CV *cv)
259	{	377	{
260	MAGIC *mg = CORO_MAGIC (cv);	378	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	379	AV *av;
262		380
263	if (!mg)	381	if (expect_false (!mg))
264	{	382	{
265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267	mg->mg_virtual = &vtbl_coro;	385	mg->mg_virtual = &vtbl_coro;
268	mg->mg_obj = (SV *)newAV ();	386	mg->mg_obj = (SV *)newAV ();
269	}	387	}
270		388
271	av = (AV *)mg->mg_obj;	389	av = (AV *)mg->mg_obj;
272		390
273	if (AvFILLp (av) >= AvMAX (av))	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
274	av_extend (av, AvMAX (av) + 1);	392	av_extend (av, AvMAX (av) + 1);
275		393
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	395	}
278		396
279	#define SB do {	397	/** load & save, init *******************************************************/
280	#define SE } while (0)
281		398
282	#define LOAD(state) load_state((state));
283	#define SAVE(state,flags) save_state((state),(flags));
284
285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286
287	static void	399	static void
288	load_state(Coro__State c)	400	load_perl (pTHX_ Coro__State c)
289	{	401	{
290	#define VAR(name,type) PL_ ## name = c->name;	402	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	403	# include "state.h"
292	#undef VAR	404	#undef VAR
293		405
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	406	GvSV (PL_defgv) = c->defsv;
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	407	GvAV (PL_defgv) = c->defav;
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	408	GvSV (PL_errgv) = c->errsv;
		409	GvSV (irsgv) = c->irssv_sv;
297		410
298	{	411	{
299	dSP;	412	dSP;
300	CV *cv;	413	CV *cv;
301		414
302	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
304	{	417	{
305	put_padlist (cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	419	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	420	CvPADLIST (cv) = (AV *)POPs;
308	}	421	}
309		422
310	PUTBACK;	423	PUTBACK;
311	}	424	}
312	}	425	}
313		426
314	static void	427	static void
315	save_state(Coro__State c, int flags)	428	save_perl (pTHX_ Coro__State c)
316	{	429	{
317	{	430	{
318	dSP;	431	dSP;
319	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	436	/*
324	* 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
325	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
326	*/	439	*/
327		440
328	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
330	for (;;)	443	for (;;)
331	{	444	{
332	while (cxix >= 0)	445	while (expect_true (cxix >= 0))
333	{	446	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
335		448
336	if (CxTYPE(cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337	{	450	{
338	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
339		452
340	if (CvDEPTH (cv))	453	if (expect_true (CvDEPTH (cv)))
341	{	454	{
342	EXTEND (SP, 3);	455	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	456	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
347		459
348	CvDEPTH (cv) = 0;	460	CvDEPTH (cv) = 0;
349	get_padlist (cv);	461	get_padlist (aTHX_ cv);
350	}	462	}
351	}	463	}
352	#ifdef CXt_FORMAT
353	else if (CxTYPE(cx) == CXt_FORMAT)
354	{
355	/* I never used formats, so how should I know how these are implemented? */
356	/* my bold guess is as a simple, plain sub... */
357	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358	}
359	#endif
360	}	464	}
361		465
362	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
363	break;	467	break;
364		468
365	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
366	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
367	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
368	}	472	}
369		473
370	PUTBACK;	474	PUTBACK;
371	}	475	}
372		476
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
		480	c->irssv_sv = GvSV (irsgv);
376		481
377	#define VAR(name,type)c->name = PL_ ## name;	482	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	483	# include "state.h"
379	#undef VAR	484	#undef VAR
380	}	485	}
…		…
383	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	490	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	491	* not usually need a lot of stackspace.
387	*/	492	*/
		493	#if CORO_PREFER_PERL_FUNCTIONS
		494	# define coro_init_stacks init_stacks
		495	#else
388	static void	496	static void
389	coro_init_stacks ()	497	coro_init_stacks (pTHX)
390	{	498	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	499	PL_curstackinfo = new_stackinfo(64, 6);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		503
396	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		507
400	New(50,PL_tmps_stack,96,SV*);	508	New(50,PL_tmps_stack,64,SV*);
401	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	511	PL_tmps_max = 64;
404		512
405	New(54,PL_markstack,16,I32);	513	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	515	PL_markstack_max = PL_markstack + 16;
408		516
…		…
412		520
413	New(54,PL_scopestack,16,I32);	521	New(54,PL_scopestack,16,I32);
414	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	523	PL_scopestack_max = 16;
416		524
417	New(54,PL_savestack,96,ANY);	525	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	527	PL_savestack_max = 64;
420		528
421	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	530	New(54,PL_retstack,4,OP*);
423	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	532	PL_retstack_max = 4;
425	#endif	533	#endif
426	}	534	}
		535	#endif
427		536
428	/*	537	/*
429	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
430	*/	539	*/
431	static void	540	static void
432	coro_destroy_stacks ()	541	coro_destroy_stacks (pTHX)
433	{	542	{
434	if (!IN_DESTRUCT)
435	{
436	/* is this ugly, I ask? */
437	LEAVE_SCOPE (0);
438
439	/* sure it is, but more important: is it correct?? :/ */
440	FREETMPS;
441
442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443	}
444
445	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
447		545
448	while (PL_curstackinfo)	546	while (PL_curstackinfo)
449	{	547	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	548	PERL_SI *p = PL_curstackinfo->si_prev;
451		549
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	550	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	551	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		552
464	Safefree (PL_curstackinfo->si_cxstack);	553	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	554	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	555	PL_curstackinfo = p;
467	}	556	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	562	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	563	Safefree (PL_retstack);
475	#endif	564	#endif
476	}	565	}
477		566
478	static void	567	static size_t
479	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)
480	{	602	{
481	/*	603	/*
482	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
483	*/	605	*/
484
485	coro_init_stacks ();	606	coro_init_stacks (aTHX);
486		607
		608	PL_runops = RUNOPS_DEFAULT;
		609	PL_curcop = &PL_compiling;
		610	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	611	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	612	PL_curpm = 0;
		613	PL_curpad = 1;
		614	PL_localizing = 0;
		615	PL_dirty = 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 = SvREFCNT_inc (stdoutgv);
490		624
491	{	625	{
492	dSP;	626	dSP;
493	LOGOP myop;	627	LOGOP myop;
494		628
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501	Zero (&myop, 1, LOGOP);	629	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	630	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	631	myop.op_flags = OPf_WANT_VOID;
504		632
		633	PUSHMARK (SP);
		634	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		635	PUTBACK;
505	PL_op = (OP *)&myop;	636	PL_op = (OP *)&myop;
506
507	PUSHMARK (SP);
508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509	PUTBACK;
510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	637	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	638	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	639	}
515	}
516		640
		641	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		642	}
		643
517	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
518	free_coro_mortal ()	678	free_coro_mortal (pTHX)
519	{	679	{
520	if (coro_mortal)	680	if (expect_true (coro_mortal))
521	{	681	{
522	SvREFCNT_dec (coro_mortal);	682	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	683	coro_mortal = 0;
524	}	684	}
525	}	685	}
526		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
		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 */
527	static void NOINLINE	814	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	815	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	816	{
530	dSP;	817	dSP;
531	LOGOP myop;	818	LOGOP myop;
532		819
		820	PL_top_env = &PL_start_env;
		821
		822	if (cctx->flags & CC_TRACE)
		823	PL_runops = runops_trace;
		824
533	Zero (&myop, 1, LOGOP);	825	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	826	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	827	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		828
539	PUSHMARK (SP);	829	PUSHMARK (SP);
		830	EXTEND (SP, 2);
		831	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	832	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	833	PUTBACK;
		834	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	835	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	836	SPAGAIN;
544	}	837	}
545		838
		839	/*
		840	* this is a _very_ stripped down perl interpreter ;)
		841	*/
546	static void	842	static void
547	coro_run (void *arg)	843	coro_run (void *arg)
548	{	844	{
		845	dTHX;
		846
549	/* coro_run is the alternative epilogue of transfer() */	847	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	848	UNLOCK;
551		849
		850	/* we now skip the entersub that lead to transfer() */
		851	PL_op = PL_op->op_next;
		852
		853	/* inject a fake subroutine call to cctx_init */
		854	prepare_cctx (aTHX_ (coro_cctx *)arg);
		855
		856	/* somebody or something will hit me for both perl_run and PL_restartop */
		857	PL_restartop = PL_op;
		858	perl_run (PL_curinterp);
		859
552	/*	860	/*
553	* this is a _very_ stripped down perl interpreter ;)	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
554	*/	866	*/
555	PL_top_env = &PL_start_env;	867	PL_top_env = main_top_env;
556		868	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
557	/* inject call to cctx_init */
558	prepare_cctx ((coro_cctx *)arg);
559
560	/* somebody will hit me for both perl_run and PL_restartop */
561	perl_run (PL_curinterp);
562
563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564	abort ();
565	}	869	}
566		870
567	static coro_cctx *	871	static coro_cctx *
568	cctx_new ()	872	cctx_new ()
569	{	873	{
570	coro_cctx *cctx;	874	coro_cctx *cctx;
		875	void *stack_start;
		876	size_t stack_size;
571		877
572	++cctx_count;	878	++cctx_count;
573		879
574	New (0, cctx, 1, coro_cctx);	880	Newz (0, cctx, 1, coro_cctx);
575		881
576	#if HAVE_MMAP	882	#if HAVE_MMAP
577		883
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	884	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	885	/* mmap supposedly does allocate-on-write for us */
580	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);
581		887
582	if (cctx->sptr == (void *)-1)	888	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	889	{
587
588	# if STACKGUARD	890	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	891	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# 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);
591		902
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	903	if (!cctx->sptr)
598	{	904	{
599	perror ("FATAL: unable to malloc stack for coroutine");	905	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	906	_exit (EXIT_FAILURE);
601	}	907	}
602		908
603	#endif	909	stack_start = cctx->sptr;
		910	stack_size = cctx->ssize;
		911	}
604		912
605	#if USE_VALGRIND	913	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608	cctx->ssize + (char *)cctx->sptr
609	);
610	#endif
611
612	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);
613		915
614	return cctx;	916	return cctx;
615	}	917	}
616		918
617	static void	919	static void
618	cctx_free (coro_cctx *cctx)	920	cctx_destroy (coro_cctx *cctx)
619	{	921	{
620	if (!cctx)	922	if (!cctx)
621	return;	923	return;
622		924
623	--cctx_count;	925	--cctx_count;
624		926
625	#if USE_VALGRIND	927	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	928	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	929	#endif
628		930
629	#if HAVE_MMAP	931	#if HAVE_MMAP
		932	if (cctx->flags & CC_MAPPED)
630	munmap (cctx->sptr, cctx->ssize);	933	munmap (cctx->sptr, cctx->ssize);
631	#else	934	else
		935	#endif
632	Safefree (cctx->sptr);	936	Safefree (cctx->sptr);
633	#endif
634		937
635	Safefree (cctx);	938	Safefree (cctx);
636	}	939	}
637		940
		941	/* wether this cctx should be destructed */
		942	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		943
638	static coro_cctx *	944	static coro_cctx *
639	cctx_get ()	945	cctx_get (pTHX)
640	{	946	{
641	coro_cctx *cctx;	947	while (expect_true (cctx_first))
642
643	if (cctx_first)
644	{	948	{
		949	coro_cctx *cctx = cctx_first;
		950	cctx_first = cctx->next;
645	--cctx_idle;	951	--cctx_idle;
646	cctx = cctx_first;	952
647	cctx_first = cctx->next;	953	if (expect_true (!CCTX_EXPIRED (cctx)))
648	}	954	return cctx;
649	else	955
650	{	956	cctx_destroy (cctx);
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;
653	}	957	}
654		958
655	return cctx;	959	return cctx_new ();
656	}	960	}
657		961
658	static void	962	static void
659	cctx_put (coro_cctx *cctx)	963	cctx_put (coro_cctx *cctx)
660	{	964	{
		965	/* free another cctx if overlimit */
		966	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		967	{
		968	coro_cctx *first = cctx_first;
		969	cctx_first = first->next;
		970	--cctx_idle;
		971
		972	cctx_destroy (first);
		973	}
		974
661	++cctx_idle;	975	++cctx_idle;
662	cctx->next = cctx_first;	976	cctx->next = cctx_first;
663	cctx_first = cctx;	977	cctx_first = cctx;
664	}	978	}
665		979
666	/* 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 */
667	static void NOINLINE	1002	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	1003	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	1004	{
670	dSTACKLEVEL;	1005	dSTACKLEVEL;
671		1006
672	/* sometimes transfer is only called to set idle_sp */	1007	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	1008	if (expect_false (!next))
		1009	{
674	((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	}
675	else if (prev != next)	1013	else if (expect_true (prev != next))
676	{	1014	{
677	coro_cctx *prev__cctx;	1015	coro_cctx *prev__cctx;
678		1016
679	if (!prev->cctx)	1017	if (expect_false (prev->flags & CF_NEW))
680	{	1018	{
681	/* create a new empty context */	1019	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	1020	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	1021	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	1022	prev->flags |= CF_RUNNING;
685	}	1023	}
686
687	if (!prev->flags & CF_RUNNING)
688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689
690	if (next->flags & CF_RUNNING)
691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692		1024
693	prev->flags &= ~CF_RUNNING;	1025	prev->flags &= ~CF_RUNNING;
694	next->flags |= CF_RUNNING;	1026	next->flags |= CF_RUNNING;
695		1027
696	LOCK;	1028	LOCK;
697		1029
698	if (next->mainstack)	1030	if (expect_false (next->flags & CF_NEW))
699	{	1031	{
700	/* coroutine already started */	1032	/* need to start coroutine */
701	SAVE (prev, flags);	1033	next->flags &= ~CF_NEW;
702	LOAD (next);	1034	/* first get rid of the old state */
		1035	save_perl (aTHX_ prev);
		1036	/* setup coroutine call */
		1037	coro_setup (aTHX_ next);
703	}	1038	}
704	else	1039	else
705	{	1040	{
706	/* need to start coroutine */	1041	/* coroutine already started */
707	/* first get rid of the old state */	1042	save_perl (aTHX_ prev);
708	SAVE (prev, -1);	1043	load_perl (aTHX_ next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	1044	}
714		1045
715	prev__cctx = prev->cctx;	1046	prev__cctx = prev->cctx;
716		1047
717	/* possibly "free" the cctx */	1048	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	1049	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
719	{	1050	{
720	assert (PL_top_env == prev__cctx->top_env);	1051	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1052	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1053
		1054	prev->cctx = 0;
		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);
721		1060
722	cctx_put (prev__cctx);	1061	cctx_put (prev__cctx);
723	prev->cctx = 0;
724	}	1062	}
725		1063
		1064	++next->usecount;
		1065
726	if (!next->cctx)	1066	if (expect_true (!next->cctx))
727	next->cctx = cctx_get ();	1067	next->cctx = cctx_get (aTHX);
728		1068
729	if (prev__cctx != next->cctx)	1069	if (expect_false (prev__cctx != next->cctx))
730	{	1070	{
731	assert ( prev__cctx->inuse);
732	assert (!next->cctx->inuse);
733
734	prev__cctx->inuse = 0;
735	next->cctx->inuse = 1;
736
737	prev__cctx->top_env = PL_top_env;	1071	prev__cctx->top_env = PL_top_env;
738	PL_top_env = next->cctx->top_env;	1072	PL_top_env = next->cctx->top_env;
739	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1073	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
740	}	1074	}
741		1075
742	free_coro_mortal ();	1076	free_coro_mortal (aTHX);
743
744	UNLOCK;	1077	UNLOCK;
745	}	1078	}
746	}	1079	}
747		1080
748	struct transfer_args	1081	struct transfer_args
749	{	1082	{
750	struct coro *prev, *next;	1083	struct coro *prev, *next;
751	int flags;
752	};	1084	};
753		1085
754	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1086	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1087	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
755		1088
		1089	/** high level stuff ********************************************************/
		1090
756	static void	1091	static int
757	coro_state_destroy (struct coro *coro)	1092	coro_state_destroy (pTHX_ struct coro *coro)
758	{	1093	{
759	if (coro->refcnt--)	1094	if (coro->flags & CF_DESTROYED)
760	return;	1095	return 0;
761		1096
		1097	coro->flags |= CF_DESTROYED;
		1098
762	if (coro->flags & CF_RUNNING)	1099	if (coro->flags & CF_READY)
763	croak ("FATAL: tried to destroy currently running coroutine");	1100	{
		1101	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1102	/* alternative: look through all ready queues and remove the coro */
		1103	LOCK;
		1104	--coro_nready;
		1105	UNLOCK;
		1106	}
		1107	else
		1108	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
764		1109
765	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	if (coro->mainstack && coro->mainstack != main_mainstack)
766	{	1111	{
767	struct coro temp;	1112	struct coro temp;
768		1113
769	SAVE ((&temp), TRANSFER_SAVE_ALL);	1114	if (coro->flags & CF_RUNNING)
770	LOAD (coro);	1115	croak ("FATAL: tried to destroy currently running coroutine");
771		1116
772	coro_destroy_stacks ();	1117	save_perl (aTHX_ &temp);
		1118	load_perl (aTHX_ coro);
773		1119
		1120	coro_destroy (aTHX_ coro);
		1121
774	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1122	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
775		1123
776	coro->mainstack = 0;	1124	coro->mainstack = 0;
777	}	1125	}
778		1126
779	cctx_free (coro->cctx);	1127	cctx_destroy (coro->cctx);
780	SvREFCNT_dec (coro->args);	1128	SvREFCNT_dec (coro->args);
781	Safefree (coro);	1129
		1130	if (coro->next) coro->next->prev = coro->prev;
		1131	if (coro->prev) coro->prev->next = coro->next;
		1132	if (coro == coro_first) coro_first = coro->next;
		1133
		1134	return 1;
782	}	1135	}
783		1136
784	static int	1137	static int
785	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1138	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
786	{	1139	{
787	struct coro *coro = (struct coro *)mg->mg_ptr;	1140	struct coro *coro = (struct coro *)mg->mg_ptr;
788	mg->mg_ptr = 0;	1141	mg->mg_ptr = 0;
789		1142
		1143	coro->hv = 0;
		1144
		1145	if (--coro->refcnt < 0)
		1146	{
790	coro_state_destroy (coro);	1147	coro_state_destroy (aTHX_ coro);
		1148	Safefree (coro);
		1149	}
791		1150
792	return 0;	1151	return 0;
793	}	1152	}
794		1153
795	static int	1154	static int
…		…
802	return 0;	1161	return 0;
803	}	1162	}
804		1163
805	static MGVTBL coro_state_vtbl = {	1164	static MGVTBL coro_state_vtbl = {
806	0, 0, 0, 0,	1165	0, 0, 0, 0,
807	coro_state_clear,	1166	coro_state_free,
808	0,	1167	0,
809	#ifdef MGf_DUP	1168	#ifdef MGf_DUP
810	coro_state_dup,	1169	coro_state_dup,
811	#else	1170	#else
812	# define MGf_DUP 0	1171	# define MGf_DUP 0
813	#endif	1172	#endif
814	};	1173	};
815		1174
816	static struct coro *
817	SvSTATE (SV *coro)
818	{
819	HV *stash;
820	MAGIC *mg;
821
822	if (SvROK (coro))
823	coro = SvRV (coro);
824
825	stash = SvSTASH (coro);
826	if (stash != coro_stash && stash != coro_state_stash)
827	{
828	/* very slow, but rare, check */
829	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
830	croak ("Coro::State object required");
831	}
832
833	mg = SvMAGIC (coro);
834	assert (mg->mg_type == PERL_MAGIC_ext);
835	return (struct coro *)mg->mg_ptr;
836	}
837
838	static void	1175	static void
839	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1176	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
840	{	1177	{
841	ta->prev = SvSTATE (prev);	1178	ta->prev = SvSTATE (prev_sv);
842	ta->next = SvSTATE (next);	1179	ta->next = SvSTATE (next_sv);
843	ta->flags = flags;	1180	TRANSFER_CHECK (*ta);
844	}	1181	}
845		1182
846	static void	1183	static void
847	api_transfer (SV *prev, SV *next, int flags)	1184	api_transfer (SV *prev_sv, SV *next_sv)
848	{	1185	{
849	dTHX;	1186	dTHX;
850	struct transfer_args ta;	1187	struct transfer_args ta;
851		1188
852	prepare_transfer (&ta, prev, next, flags);	1189	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
853	TRANSFER (ta);	1190	TRANSFER (ta);
854	}	1191	}
855		1192
856	/** Coro ********************************************************************/	1193	/** Coro ********************************************************************/
857		1194
858	#define PRIO_MAX 3
859	#define PRIO_HIGH 1
860	#define PRIO_NORMAL 0
861	#define PRIO_LOW -1
862	#define PRIO_IDLE -3
863	#define PRIO_MIN -4
864
865	/* for Coro.pm */
866	static GV *coro_current, *coro_idle;
867	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
868	static int coro_nready;
869
870	static void	1195	static void
871	coro_enq (SV *coro_sv)	1196	coro_enq (pTHX_ SV *coro_sv)
872	{	1197	{
873	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1198	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
874	coro_nready++;
875	}	1199	}
876		1200
877	static SV *	1201	static SV *
878	coro_deq (int min_prio)	1202	coro_deq (pTHX_ int min_prio)
879	{	1203	{
880	int prio = PRIO_MAX - PRIO_MIN;	1204	int prio = PRIO_MAX - PRIO_MIN;
881		1205
882	min_prio -= PRIO_MIN;	1206	min_prio -= PRIO_MIN;
883	if (min_prio < 0)	1207	if (min_prio < 0)
884	min_prio = 0;	1208	min_prio = 0;
885		1209
886	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1210	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
887	if (AvFILLp (coro_ready [prio]) >= 0)	1211	if (AvFILLp (coro_ready [prio]) >= 0)
888	{
889	coro_nready--;
890	return av_shift (coro_ready [prio]);	1212	return av_shift (coro_ready [prio]);
891	}
892		1213
893	return 0;	1214	return 0;
894	}	1215	}
895		1216
896	static int	1217	static int
897	api_ready (SV *coro_sv)	1218	api_ready (SV *coro_sv)
898	{	1219	{
		1220	dTHX;
899	struct coro *coro;	1221	struct coro *coro;
900		1222
901	if (SvROK (coro_sv))	1223	if (SvROK (coro_sv))
902	coro_sv = SvRV (coro_sv);	1224	coro_sv = SvRV (coro_sv);
903		1225
904	coro = SvSTATE (coro_sv);	1226	coro = SvSTATE (coro_sv);
905		1227
906	if (coro->flags & CF_READY)	1228	if (coro->flags & CF_READY)
907	return 0;	1229	return 0;
908		1230
909	if (coro->flags & CF_RUNNING)
910	croak ("Coro::ready called on currently running coroutine");
911
912	coro->flags |= CF_READY;	1231	coro->flags |= CF_READY;
913		1232
914	LOCK;	1233	LOCK;
915	coro_enq (SvREFCNT_inc (coro_sv));	1234	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1235	++coro_nready;
916	UNLOCK;	1236	UNLOCK;
917		1237
918	return 1;	1238	return 1;
919	}	1239	}
920		1240
921	static int	1241	static int
922	api_is_ready (SV *coro_sv)	1242	api_is_ready (SV *coro_sv)
923	{	1243	{
		1244	dTHX;
924	return !!SvSTATE (coro_sv)->flags & CF_READY;	1245	return !!(SvSTATE (coro_sv)->flags & CF_READY);
925	}	1246	}
926		1247
927	static void	1248	static void
928	prepare_schedule (struct transfer_args *ta)	1249	prepare_schedule (pTHX_ struct transfer_args *ta)
929	{	1250	{
930	SV *current, *prev, *next;	1251	SV *prev_sv, *next_sv;
931
932	current = GvSV (coro_current);
933		1252
934	for (;;)	1253	for (;;)
935	{	1254	{
936	LOCK;	1255	LOCK;
937	next = coro_deq (PRIO_MIN);	1256	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1257
		1258	/* nothing to schedule: call the idle handler */
		1259	if (expect_false (!next_sv))
		1260	{
		1261	dSP;
		1262	UNLOCK;
		1263
		1264	ENTER;
		1265	SAVETMPS;
		1266
		1267	PUSHMARK (SP);
		1268	PUTBACK;
		1269	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1270
		1271	FREETMPS;
		1272	LEAVE;
		1273	continue;
		1274	}
		1275
		1276	ta->next = SvSTATE (next_sv);
		1277
		1278	/* cannot transfer to destroyed coros, skip and look for next */
		1279	if (expect_false (ta->next->flags & CF_DESTROYED))
		1280	{
		1281	UNLOCK;
		1282	SvREFCNT_dec (next_sv);
		1283	/* coro_nready is already taken care of by destroy */
		1284	continue;
		1285	}
		1286
		1287	--coro_nready;
938	UNLOCK;	1288	UNLOCK;
939
940	if (next)
941	break;	1289	break;
942
943	{
944	dSP;
945
946	ENTER;
947	SAVETMPS;
948
949	PUSHMARK (SP);
950	PUTBACK;
951	call_sv (GvSV (coro_idle), G_DISCARD);
952
953	FREETMPS;
954	LEAVE;
955	}	1290	}
956	}
957
958	prev = SvRV (current);
959	SvRV (current) = next;
960		1291
961	/* free this only after the transfer */	1292	/* free this only after the transfer */
		1293	prev_sv = SvRV (coro_current);
		1294	ta->prev = SvSTATE (prev_sv);
		1295	TRANSFER_CHECK (*ta);
		1296	assert (ta->next->flags & CF_READY);
		1297	ta->next->flags &= ~CF_READY;
		1298	SvRV_set (coro_current, next_sv);
		1299
962	LOCK;	1300	LOCK;
963	free_coro_mortal ();	1301	free_coro_mortal (aTHX);
		1302	coro_mortal = prev_sv;
964	UNLOCK;	1303	UNLOCK;
965	coro_mortal = prev;
966
967	ta->prev = SvSTATE (prev);
968	ta->next = SvSTATE (next);
969	ta->flags = TRANSFER_SAVE_ALL;
970
971	ta->next->flags &= ~CF_READY;
972	}	1304	}
973		1305
974	static void	1306	static void
975	prepare_cede (struct transfer_args *ta)	1307	prepare_cede (pTHX_ struct transfer_args *ta)
976	{	1308	{
977	api_ready (GvSV (coro_current));	1309	api_ready (coro_current);
978
979	prepare_schedule (ta);	1310	prepare_schedule (aTHX_ ta);
		1311	}
		1312
		1313	static int
		1314	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1315	{
		1316	if (coro_nready)
		1317	{
		1318	SV *prev = SvRV (coro_current);
		1319	prepare_schedule (aTHX_ ta);
		1320	api_ready (prev);
		1321	return 1;
		1322	}
		1323	else
		1324	return 0;
980	}	1325	}
981		1326
982	static void	1327	static void
983	api_schedule (void)	1328	api_schedule (void)
984	{	1329	{
985	dTHX;	1330	dTHX;
986	struct transfer_args ta;	1331	struct transfer_args ta;
987		1332
988	prepare_schedule (&ta);	1333	prepare_schedule (aTHX_ &ta);
989	TRANSFER (ta);	1334	TRANSFER (ta);
990	}	1335	}
991		1336
992	static void	1337	static int
993	api_cede (void)	1338	api_cede (void)
994	{	1339	{
995	dTHX;	1340	dTHX;
996	struct transfer_args ta;	1341	struct transfer_args ta;
997		1342
998	prepare_cede (&ta);	1343	prepare_cede (aTHX_ &ta);
		1344
		1345	if (expect_true (ta.prev != ta.next))
		1346	{
999	TRANSFER (ta);	1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
1000	}	1352	}
1001		1353
		1354	static int
		1355	api_cede_notself (void)
		1356	{
		1357	dTHX;
		1358	struct transfer_args ta;
		1359
		1360	if (prepare_cede_notself (aTHX_ &ta))
		1361	{
		1362	TRANSFER (ta);
		1363	return 1;
		1364	}
		1365	else
		1366	return 0;
		1367	}
		1368
		1369	static void
		1370	api_trace (SV *coro_sv, int flags)
		1371	{
		1372	dTHX;
		1373	struct coro *coro = SvSTATE (coro_sv);
		1374
		1375	if (flags & CC_TRACE)
		1376	{
		1377	if (!coro->cctx)
		1378	coro->cctx = cctx_new ();
		1379	else if (!(coro->cctx->flags & CC_TRACE))
		1380	croak ("cannot enable tracing on coroutine with custom stack");
		1381
		1382	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1383	}
		1384	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1385	{
		1386	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1387
		1388	if (coro->flags & CF_RUNNING)
		1389	PL_runops = RUNOPS_DEFAULT;
		1390	else
		1391	coro->runops = RUNOPS_DEFAULT;
		1392	}
		1393	}
		1394
1002	MODULE = Coro::State PACKAGE = Coro::State	1395	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1003		1396
1004	PROTOTYPES: DISABLE	1397	PROTOTYPES: DISABLE
1005		1398
1006	BOOT:	1399	BOOT:
1007	{	1400	{
1008	#ifdef USE_ITHREADS	1401	#ifdef USE_ITHREADS
1009	MUTEX_INIT (&coro_mutex);	1402	MUTEX_INIT (&coro_mutex);
1010	#endif	1403	#endif
1011	BOOT_PAGESIZE;	1404	BOOT_PAGESIZE;
1012		1405
		1406	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1407	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1408
1013	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1409	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1014		1410
1015	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1411	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1016	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1412	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1017	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1413	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1414	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1018		1415
1019	main_mainstack = PL_mainstack;	1416	main_mainstack = PL_mainstack;
		1417	main_top_env = PL_top_env;
		1418
		1419	while (main_top_env->je_prev)
		1420	main_top_env = main_top_env->je_prev;
1020		1421
1021	coroapi.ver = CORO_API_VERSION;	1422	coroapi.ver = CORO_API_VERSION;
1022	coroapi.transfer = api_transfer;	1423	coroapi.transfer = api_transfer;
1023		1424
1024	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1425	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1031	struct coro *coro;	1432	struct coro *coro;
1032	HV *hv;	1433	HV *hv;
1033	int i;	1434	int i;
1034		1435
1035	Newz (0, coro, 1, struct coro);	1436	Newz (0, coro, 1, struct coro);
1036	coro->args = newAV ();	1437	coro->args = newAV ();
		1438	coro->flags = CF_NEW;
1037		1439
		1440	if (coro_first) coro_first->prev = coro;
		1441	coro->next = coro_first;
		1442	coro_first = coro;
		1443
1038	hv = newHV ();	1444	coro->hv = hv = newHV ();
1039	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1445	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1040	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1446	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1041		1447
		1448	av_extend (coro->args, items - 1);
1042	for (i = 1; i < items; i++)	1449	for (i = 1; i < items; i++)
1043	av_push (coro->args, newSVsv (ST (i)));	1450	av_push (coro->args, newSVsv (ST (i)));
1044	}	1451	}
1045	OUTPUT:	1452	OUTPUT:
1046	RETVAL	1453	RETVAL
1047		1454
		1455	# these not obviously related functions are all rolled into the same xs
		1456	# function to increase chances that they all will call transfer with the same
		1457	# stack offset
1048	void	1458	void
1049	_set_stacklevel (...)	1459	_set_stacklevel (...)
1050	ALIAS:	1460	ALIAS:
1051	Coro::State::transfer = 1	1461	Coro::State::transfer = 1
1052	Coro::schedule = 2	1462	Coro::schedule = 2
1053	Coro::cede = 3	1463	Coro::cede = 3
1054	Coro::Cont::yield = 4	1464	Coro::cede_notself = 4
1055	CODE:	1465	CODE:
1056	{	1466	{
1057	struct transfer_args ta;	1467	struct transfer_args ta;
1058		1468
1059	switch (ix)	1469	switch (ix)
1060	{	1470	{
1061	case 0:	1471	case 0:
1062	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1472	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1063	ta.next = 0;	1473	ta.next = 0;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;
1065	break;	1474	break;
1066		1475
1067	case 1:	1476	case 1:
1068	if (items != 3)	1477	if (items != 2)
1069	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1478	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1070		1479
1071	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1480	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1072	break;	1481	break;
1073		1482
1074	case 2:	1483	case 2:
1075	prepare_schedule (&ta);	1484	prepare_schedule (aTHX_ &ta);
1076	break;	1485	break;
1077		1486
1078	case 3:	1487	case 3:
1079	prepare_cede (&ta);	1488	prepare_cede (aTHX_ &ta);
1080	break;	1489	break;
1081		1490
1082	case 4:	1491	case 4:
1083	{	1492	if (!prepare_cede_notself (aTHX_ &ta))
1084	SV *yieldstack;	1493	XSRETURN_EMPTY;
1085	SV *sv;
1086	AV *defav = GvAV (PL_defgv);
1087		1494
1088	yieldstack = *hv_fetch (
1089	(HV *)SvRV (GvSV (coro_current)),
1090	"yieldstack", sizeof ("yieldstack") - 1,
1091	0
1092	);
1093
1094	/* set up @_ -- ugly */
1095	av_clear (defav);
1096	av_fill (defav, items - 1);
1097	while (items--)
1098	av_store (defav, items, SvREFCNT_inc (ST(items)));
1099
1100	sv = av_pop ((AV *)SvRV (yieldstack));
1101	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1102	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1103	ta.flags = 0;
1104	SvREFCNT_dec (sv);
1105	}
1106	break;	1495	break;
1107
1108	}	1496	}
1109		1497
		1498	BARRIER;
1110	TRANSFER (ta);	1499	TRANSFER (ta);
1111	}
1112		1500
1113	void	1501	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1114	_clone_state_from (SV *dst, SV *src)	1502	XSRETURN_YES;
		1503	}
		1504
		1505	bool
		1506	_destroy (SV *coro_sv)
1115	CODE:	1507	CODE:
1116	{	1508	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1117	struct coro *coro_src = SvSTATE (src);	1509	OUTPUT:
1118		1510	RETVAL
1119	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1120
1121	++coro_src->refcnt;
1122	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1123	}
1124		1511
1125	void	1512	void
1126	_exit (code)	1513	_exit (code)
1127	int code	1514	int code
1128	PROTOTYPE: $	1515	PROTOTYPE: $
1129	CODE:	1516	CODE:
1130	_exit (code);	1517	_exit (code);
1131		1518
1132	int	1519	int
		1520	cctx_stacksize (int new_stacksize = 0)
		1521	CODE:
		1522	RETVAL = coro_stacksize;
		1523	if (new_stacksize)
		1524	coro_stacksize = new_stacksize;
		1525	OUTPUT:
		1526	RETVAL
		1527
		1528	int
1133	cctx_count ()	1529	cctx_count ()
1134	CODE:	1530	CODE:
1135	RETVAL = cctx_count;	1531	RETVAL = cctx_count;
1136	OUTPUT:	1532	OUTPUT:
1137	RETVAL	1533	RETVAL
…		…
1141	CODE:	1537	CODE:
1142	RETVAL = cctx_idle;	1538	RETVAL = cctx_idle;
1143	OUTPUT:	1539	OUTPUT:
1144	RETVAL	1540	RETVAL
1145		1541
		1542	void
		1543	list ()
		1544	PPCODE:
		1545	{
		1546	struct coro *coro;
		1547	for (coro = coro_first; coro; coro = coro->next)
		1548	if (coro->hv)
		1549	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1550	}
		1551
		1552	void
		1553	call (Coro::State coro, SV *coderef)
		1554	ALIAS:
		1555	eval = 1
		1556	CODE:
		1557	{
		1558	if (coro->mainstack)
		1559	{
		1560	struct coro temp;
		1561	Zero (&temp, 1, struct coro);
		1562
		1563	if (!(coro->flags & CF_RUNNING))
		1564	{
		1565	save_perl (aTHX_ &temp);
		1566	load_perl (aTHX_ coro);
		1567	}
		1568
		1569	{
		1570	dSP;
		1571	ENTER;
		1572	SAVETMPS;
		1573	PUSHMARK (SP);
		1574	PUTBACK;
		1575	if (ix)
		1576	eval_sv (coderef, 0);
		1577	else
		1578	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1579	SPAGAIN;
		1580	FREETMPS;
		1581	LEAVE;
		1582	PUTBACK;
		1583	}
		1584
		1585	if (!(coro->flags & CF_RUNNING))
		1586	{
		1587	save_perl (aTHX_ coro);
		1588	load_perl (aTHX_ &temp);
		1589	}
		1590	}
		1591	}
		1592
		1593	SV *
		1594	is_ready (Coro::State coro)
		1595	PROTOTYPE: $
		1596	ALIAS:
		1597	is_ready = CF_READY
		1598	is_running = CF_RUNNING
		1599	is_new = CF_NEW
		1600	is_destroyed = CF_DESTROYED
		1601	CODE:
		1602	RETVAL = boolSV (coro->flags & ix);
		1603	OUTPUT:
		1604	RETVAL
		1605
		1606	void
		1607	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1608
		1609	SV *
		1610	has_stack (Coro::State coro)
		1611	PROTOTYPE: $
		1612	CODE:
		1613	RETVAL = boolSV (!!coro->cctx);
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	int
		1618	is_traced (Coro::State coro)
		1619	PROTOTYPE: $
		1620	CODE:
		1621	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1622	OUTPUT:
		1623	RETVAL
		1624
		1625	IV
		1626	rss (Coro::State coro)
		1627	PROTOTYPE: $
		1628	ALIAS:
		1629	usecount = 1
		1630	CODE:
		1631	switch (ix)
		1632	{
		1633	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1634	case 1: RETVAL = coro->usecount; break;
		1635	}
		1636	OUTPUT:
		1637	RETVAL
		1638
		1639
1146	MODULE = Coro::State PACKAGE = Coro	1640	MODULE = Coro::State PACKAGE = Coro
1147		1641
1148	BOOT:	1642	BOOT:
1149	{	1643	{
1150	int i;	1644	int i;
		1645
		1646	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1647	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1648	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1649
		1650	coro_current = get_sv ("Coro::current", FALSE);
		1651	SvREADONLY_on (coro_current);
1151		1652
1152	coro_stash = gv_stashpv ("Coro", TRUE);	1653	coro_stash = gv_stashpv ("Coro", TRUE);
1153		1654
1154	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1655	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1155	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1656	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1156	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1657	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1157	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1658	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1158	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1659	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1159	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1660	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1160		1661
1161	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1162	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1163
1164	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1662	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1165	coro_ready[i] = newAV ();	1663	coro_ready[i] = newAV ();
1166		1664
1167	{	1665	{
1168	SV *sv = perl_get_sv("Coro::API", 1);	1666	SV *sv = perl_get_sv("Coro::API", 1);
1169		1667
1170	coroapi.schedule = api_schedule;	1668	coroapi.schedule = api_schedule;
1171	coroapi.cede = api_cede;	1669	coroapi.cede = api_cede;
		1670	coroapi.cede_notself = api_cede_notself;
1172	coroapi.ready = api_ready;	1671	coroapi.ready = api_ready;
1173	coroapi.is_ready = api_is_ready;	1672	coroapi.is_ready = api_is_ready;
1174	coroapi.nready = &coro_nready;	1673	coroapi.nready = &coro_nready;
1175	coroapi.current = coro_current;	1674	coroapi.current = coro_current;
1176		1675
1177	GCoroAPI = &coroapi;	1676	GCoroAPI = &coroapi;
1178	sv_setiv (sv, (IV)&coroapi);	1677	sv_setiv (sv, (IV)&coroapi);
1179	SvREADONLY_on (sv);	1678	SvREADONLY_on (sv);
1180	}	1679	}
1181	}	1680	}
		1681
		1682	void
		1683	_set_current (SV *current)
		1684	PROTOTYPE: $
		1685	CODE:
		1686	SvREFCNT_dec (SvRV (coro_current));
		1687	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1182		1688
1183	int	1689	int
1184	prio (Coro::State coro, int newprio = 0)	1690	prio (Coro::State coro, int newprio = 0)
1185	ALIAS:	1691	ALIAS:
1186	nice = 1	1692	nice = 1
…		…
1189	RETVAL = coro->prio;	1695	RETVAL = coro->prio;
1190		1696
1191	if (items > 1)	1697	if (items > 1)
1192	{	1698	{
1193	if (ix)	1699	if (ix)
1194	newprio += coro->prio;	1700	newprio = coro->prio - newprio;
1195		1701
1196	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1702	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1197	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1703	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1198		1704
1199	coro->prio = newprio;	1705	coro->prio = newprio;
1200	}	1706	}
1201	}	1707	}
		1708	OUTPUT:
		1709	RETVAL
1202		1710
1203	SV *	1711	SV *
1204	ready (SV *self)	1712	ready (SV *self)
1205	PROTOTYPE: $	1713	PROTOTYPE: $
1206	CODE:	1714	CODE:
1207	RETVAL = boolSV (api_ready (self));	1715	RETVAL = boolSV (api_ready (self));
1208	OUTPUT:	1716	OUTPUT:
1209	RETVAL	1717	RETVAL
1210		1718
1211	SV *
1212	is_ready (SV *self)
1213	PROTOTYPE: $
1214	CODE:
1215	RETVAL = boolSV (api_is_ready (self));
1216	OUTPUT:
1217	RETVAL
1218
1219	int	1719	int
1220	nready (...)	1720	nready (...)
1221	PROTOTYPE:	1721	PROTOTYPE:
1222	CODE:	1722	CODE:
1223	RETVAL = coro_nready;	1723	RETVAL = coro_nready;
1224	OUTPUT:	1724	OUTPUT:
1225	RETVAL	1725	RETVAL
1226		1726
		1727	# for async_pool speedup
		1728	void
		1729	_pool_1 (SV *cb)
		1730	CODE:
		1731	{
		1732	struct coro *coro = SvSTATE (coro_current);
		1733	HV *hv = (HV *)SvRV (coro_current);
		1734	AV *defav = GvAV (PL_defgv);
		1735	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1736	AV *invoke_av;
		1737	int i, len;
		1738
		1739	if (!invoke)
		1740	croak ("\3terminate\2\n");
		1741
		1742	SvREFCNT_dec (coro->saved_deffh);
		1743	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1744
		1745	hv_store (hv, "desc", sizeof ("desc") - 1,
		1746	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1747
		1748	invoke_av = (AV *)SvRV (invoke);
		1749	len = av_len (invoke_av);
		1750
		1751	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1752
		1753	if (len > 0)
		1754	{
		1755	av_fill (defav, len - 1);
		1756	for (i = 0; i < len; ++i)
		1757	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1758	}
		1759
		1760	SvREFCNT_dec (invoke);
		1761	}
		1762
		1763	void
		1764	_pool_2 (SV *cb)
		1765	CODE:
		1766	{
		1767	struct coro *coro = SvSTATE (coro_current);
		1768
		1769	sv_setsv (cb, &PL_sv_undef);
		1770
		1771	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1772	coro->saved_deffh = 0;
		1773
		1774	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1775	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1776	croak ("\3terminate\2\n");
		1777
		1778	av_clear (GvAV (PL_defgv));
		1779	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1780	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1781
		1782	coro->prio = 0;
		1783
		1784	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1785	api_trace (coro_current, 0);
		1786
		1787	av_push (av_async_pool, newSVsv (coro_current));
		1788	}
		1789
		1790
1227	MODULE = Coro::State PACKAGE = Coro::AIO	1791	MODULE = Coro::State PACKAGE = Coro::AIO
1228		1792
1229	SV *	1793	SV *
1230	_get_state ()	1794	_get_state ()
1231	CODE:	1795	CODE:
1232	{	1796	{
1233	struct {	1797	struct io_state *data;
1234	int errorno;
1235	int laststype;
1236	int laststatval;
1237	Stat_t statcache;
1238	} data;
1239		1798
		1799	RETVAL = newSV (sizeof (struct io_state));
		1800	data = (struct io_state *)SvPVX (RETVAL);
		1801	SvCUR_set (RETVAL, sizeof (struct io_state));
		1802	SvPOK_only (RETVAL);
		1803
1240	data.errorno = errno;	1804	data->errorno = errno;
1241	data.laststype = PL_laststype;	1805	data->laststype = PL_laststype;
1242	data.laststatval = PL_laststatval;	1806	data->laststatval = PL_laststatval;
1243	data.statcache = PL_statcache;	1807	data->statcache = PL_statcache;
1244
1245	RETVAL = newSVpvn ((char *)&data, sizeof data);
1246	}	1808	}
1247	OUTPUT:	1809	OUTPUT:
1248	RETVAL	1810	RETVAL
1249		1811
1250	void	1812	void
1251	_set_state (char *data_)	1813	_set_state (char *data_)
1252	PROTOTYPE: $	1814	PROTOTYPE: $
1253	CODE:	1815	CODE:
1254	{	1816	{
1255	struct {	1817	struct io_state *data = (void *)data_;
1256	int errorno;
1257	int laststype;
1258	int laststatval;
1259	Stat_t statcache;
1260	} *data = (void *)data_;
1261		1818
1262	errno = data->errorno;	1819	errno = data->errorno;
1263	PL_laststype = data->laststype;	1820	PL_laststype = data->laststype;
1264	PL_laststatval = data->laststatval;	1821	PL_laststatval = data->laststatval;
1265	PL_statcache = data->statcache;	1822	PL_statcache = data->statcache;
1266	}	1823	}
		1824

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