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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.194 by root, Sat Oct 6 00:08:04 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_localizing = 0;
		614	PL_dirty = 0;
		615	PL_restartop = 0;
		616
		617	GvSV (PL_defgv) = newSV (0);
		618	GvAV (PL_defgv) = coro->args; coro->args = 0;
		619	GvSV (PL_errgv) = newSV (0);
		620	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		621	PL_rs = newSVsv (GvSV (irsgv));
		622	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		623
		624	ENTER; /* necessary e.g. for dounwind */
490		625
491	{	626	{
492	dSP;	627	dSP;
493	LOGOP myop;	628	LOGOP myop;
494		629
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);	630	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	631	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	632	myop.op_flags = OPf_WANT_VOID;
504		633
		634	PUSHMARK (SP);
		635	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		636	PUTBACK;
505	PL_op = (OP *)&myop;	637	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);	638	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	639	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	640	}
515	}	641	}
516		642
517	static void	643	static void
		644	coro_destroy (pTHX_ struct coro *coro)
		645	{
		646	if (!IN_DESTRUCT)
		647	{
		648	/* restore all saved variables and stuff */
		649	LEAVE_SCOPE (0);
		650	assert (PL_tmps_floor == -1);
		651
		652	/* free all temporaries */
		653	FREETMPS;
		654	assert (PL_tmps_ix == -1);
		655
		656	/* unwind all extra stacks */
		657	POPSTACK_TO (PL_mainstack);
		658
		659	/* unwind main stack */
		660	dounwind (-1);
		661	}
		662
		663	SvREFCNT_dec (GvSV (PL_defgv));
		664	SvREFCNT_dec (GvAV (PL_defgv));
		665	SvREFCNT_dec (GvSV (PL_errgv));
		666	SvREFCNT_dec (PL_defoutgv);
		667	SvREFCNT_dec (PL_rs);
		668	SvREFCNT_dec (GvSV (irsgv));
		669
		670	SvREFCNT_dec (coro->saved_deffh);
		671	//SvREFCNT_dec (coro->throw);
		672
		673	coro_destroy_stacks (aTHX);
		674	}
		675
		676	static void
518	free_coro_mortal ()	677	free_coro_mortal (pTHX)
519	{	678	{
520	if (coro_mortal)	679	if (expect_true (coro_mortal))
521	{	680	{
522	SvREFCNT_dec (coro_mortal);	681	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	682	coro_mortal = 0;
524	}	683	}
525	}	684	}
526		685
		686	static int
		687	runops_trace (pTHX)
		688	{
		689	COP *oldcop = 0;
		690	int oldcxix = -2;
		691	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		692	coro_cctx *cctx = coro->cctx;
		693
		694	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		695	{
		696	PERL_ASYNC_CHECK ();
		697
		698	if (cctx->flags & CC_TRACE_ALL)
		699	{
		700	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		701	{
		702	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		703	SV **bot, **top;
		704	AV *av = newAV (); /* return values */
		705	SV **cb;
		706	dSP;
		707
		708	GV *gv = CvGV (cx->blk_sub.cv);
		709	SV *fullname = sv_2mortal (newSV (0));
		710	if (isGV (gv))
		711	gv_efullname3 (fullname, gv, 0);
		712
		713	bot = PL_stack_base + cx->blk_oldsp + 1;
		714	top = cx->blk_gimme == G_ARRAY ? SP + 1
		715	: cx->blk_gimme == G_SCALAR ? bot + 1
		716	: bot;
		717
		718	av_extend (av, top - bot);
		719	while (bot < top)
		720	av_push (av, SvREFCNT_inc (*bot++));
		721
		722	PL_runops = RUNOPS_DEFAULT;
		723	ENTER;
		724	SAVETMPS;
		725	EXTEND (SP, 3);
		726	PUSHMARK (SP);
		727	PUSHs (&PL_sv_no);
		728	PUSHs (fullname);
		729	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		730	PUTBACK;
		731	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		732	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		733	SPAGAIN;
		734	FREETMPS;
		735	LEAVE;
		736	PL_runops = runops_trace;
		737	}
		738
		739	if (oldcop != PL_curcop)
		740	{
		741	oldcop = PL_curcop;
		742
		743	if (PL_curcop != &PL_compiling)
		744	{
		745	SV **cb;
		746
		747	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		748	{
		749	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		750
		751	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		752	{
		753	runops_proc_t old_runops = PL_runops;
		754	dSP;
		755	GV *gv = CvGV (cx->blk_sub.cv);
		756	SV *fullname = sv_2mortal (newSV (0));
		757
		758	if (isGV (gv))
		759	gv_efullname3 (fullname, gv, 0);
		760
		761	PL_runops = RUNOPS_DEFAULT;
		762	ENTER;
		763	SAVETMPS;
		764	EXTEND (SP, 3);
		765	PUSHMARK (SP);
		766	PUSHs (&PL_sv_yes);
		767	PUSHs (fullname);
		768	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		769	PUTBACK;
		770	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		771	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		772	SPAGAIN;
		773	FREETMPS;
		774	LEAVE;
		775	PL_runops = runops_trace;
		776	}
		777
		778	oldcxix = cxstack_ix;
		779	}
		780
		781	if (cctx->flags & CC_TRACE_LINE)
		782	{
		783	dSP;
		784
		785	PL_runops = RUNOPS_DEFAULT;
		786	ENTER;
		787	SAVETMPS;
		788	EXTEND (SP, 3);
		789	PL_runops = RUNOPS_DEFAULT;
		790	PUSHMARK (SP);
		791	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		792	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		793	PUTBACK;
		794	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		795	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		796	SPAGAIN;
		797	FREETMPS;
		798	LEAVE;
		799	PL_runops = runops_trace;
		800	}
		801	}
		802	}
		803	}
		804	}
		805
		806	TAINT_NOT;
		807	return 0;
		808	}
		809
		810	/* inject a fake call to Coro::State::_cctx_init into the execution */
		811	/* _cctx_init should be careful, as it could be called at almost any time */
		812	/* during execution of a perl program */
527	static void NOINLINE	813	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	814	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	815	{
530	dSP;	816	dSP;
531	LOGOP myop;	817	LOGOP myop;
532		818
		819	PL_top_env = &PL_start_env;
		820
		821	if (cctx->flags & CC_TRACE)
		822	PL_runops = runops_trace;
		823
533	Zero (&myop, 1, LOGOP);	824	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	825	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	826	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		827
539	PUSHMARK (SP);	828	PUSHMARK (SP);
		829	EXTEND (SP, 2);
		830	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	831	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	832	PUTBACK;
		833	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	834	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	835	SPAGAIN;
544	}	836	}
545		837
		838	/*
		839	* this is a _very_ stripped down perl interpreter ;)
		840	*/
546	static void	841	static void
547	coro_run (void *arg)	842	coro_run (void *arg)
548	{	843	{
		844	dTHX;
		845
549	/* coro_run is the alternative epilogue of transfer() */	846	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	847	UNLOCK;
551		848
		849	/* we now skip the entersub that lead to transfer() */
		850	PL_op = PL_op->op_next;
		851
		852	/* inject a fake subroutine call to cctx_init */
		853	prepare_cctx (aTHX_ (coro_cctx *)arg);
		854
		855	/* somebody or something will hit me for both perl_run and PL_restartop */
		856	PL_restartop = PL_op;
		857	perl_run (PL_curinterp);
		858
552	/*	859	/*
553	* this is a _very_ stripped down perl interpreter ;)	860	* If perl-run returns we assume exit() was being called or the coro
		861	* fell off the end, which seems to be the only valid (non-bug)
		862	* reason for perl_run to return. We try to exit by jumping to the
		863	* bootstrap-time "top" top_env, as we cannot restore the "main"
		864	* coroutine as Coro has no such concept
554	*/	865	*/
555	PL_top_env = &PL_start_env;	866	PL_top_env = main_top_env;
556		867	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	}	868	}
566		869
567	static coro_cctx *	870	static coro_cctx *
568	cctx_new ()	871	cctx_new ()
569	{	872	{
570	coro_cctx *cctx;	873	coro_cctx *cctx;
		874	void *stack_start;
		875	size_t stack_size;
571		876
572	++cctx_count;	877	++cctx_count;
573		878
574	New (0, cctx, 1, coro_cctx);	879	Newz (0, cctx, 1, coro_cctx);
575		880
576	#if HAVE_MMAP	881	#if HAVE_MMAP
577		882
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	883	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	884	/* 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);	885	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581		886
582	if (cctx->sptr == (void *)-1)	887	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	888	{
587
588	# if STACKGUARD	889	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	890	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	891	# endif
		892	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		893	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		894	cctx->flags |= CC_MAPPED;
		895	}
		896	else
		897	#endif
		898	{
		899	cctx->ssize = coro_stacksize * (long)sizeof (long);
		900	New (0, cctx->sptr, coro_stacksize, long);
591		901
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	902	if (!cctx->sptr)
598	{	903	{
599	perror ("FATAL: unable to malloc stack for coroutine");	904	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	905	_exit (EXIT_FAILURE);
601	}	906	}
602		907
603	#endif	908	stack_start = cctx->sptr;
		909	stack_size = cctx->ssize;
		910	}
604		911
605	#if USE_VALGRIND	912	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);	913	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
613		914
614	return cctx;	915	return cctx;
615	}	916	}
616		917
617	static void	918	static void
618	cctx_free (coro_cctx *cctx)	919	cctx_destroy (coro_cctx *cctx)
619	{	920	{
620	if (!cctx)	921	if (!cctx)
621	return;	922	return;
622		923
623	--cctx_count;	924	--cctx_count;
624		925
625	#if USE_VALGRIND	926	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	927	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	928	#endif
628		929
629	#if HAVE_MMAP	930	#if HAVE_MMAP
		931	if (cctx->flags & CC_MAPPED)
630	munmap (cctx->sptr, cctx->ssize);	932	munmap (cctx->sptr, cctx->ssize);
631	#else	933	else
		934	#endif
632	Safefree (cctx->sptr);	935	Safefree (cctx->sptr);
633	#endif
634		936
635	Safefree (cctx);	937	Safefree (cctx);
636	}	938	}
637		939
		940	/* wether this cctx should be destructed */
		941	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		942
638	static coro_cctx *	943	static coro_cctx *
639	cctx_get ()	944	cctx_get (pTHX)
640	{	945	{
641	coro_cctx *cctx;	946	while (expect_true (cctx_first))
642
643	if (cctx_first)
644	{	947	{
		948	coro_cctx *cctx = cctx_first;
		949	cctx_first = cctx->next;
645	--cctx_idle;	950	--cctx_idle;
646	cctx = cctx_first;	951
647	cctx_first = cctx->next;	952	if (expect_true (!CCTX_EXPIRED (cctx)))
648	}	953	return cctx;
649	else	954
650	{	955	cctx_destroy (cctx);
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;
653	}	956	}
654		957
655	return cctx;	958	return cctx_new ();
656	}	959	}
657		960
658	static void	961	static void
659	cctx_put (coro_cctx *cctx)	962	cctx_put (coro_cctx *cctx)
660	{	963	{
		964	/* free another cctx if overlimit */
		965	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		966	{
		967	coro_cctx *first = cctx_first;
		968	cctx_first = first->next;
		969	--cctx_idle;
		970
		971	cctx_destroy (first);
		972	}
		973
661	++cctx_idle;	974	++cctx_idle;
662	cctx->next = cctx_first;	975	cctx->next = cctx_first;
663	cctx_first = cctx;	976	cctx_first = cctx;
664	}	977	}
665		978
666	/* never call directly, always through the coro_state_transfer global variable */	979	/** coroutine switching *****************************************************/
		980
		981	static void
		982	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		983	{
		984	if (expect_true (prev != next))
		985	{
		986	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		987	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		988
		989	if (expect_false (next->flags & CF_RUNNING))
		990	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		991
		992	if (expect_false (next->flags & CF_DESTROYED))
		993	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		994
		995	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		996	croak ("Coro::State::transfer called while parsing, but this is not supported");
		997	}
		998	}
		999
		1000	/* always use the TRANSFER macro */
667	static void NOINLINE	1001	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	1002	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	1003	{
670	dSTACKLEVEL;	1004	dSTACKLEVEL;
671		1005
672	/* sometimes transfer is only called to set idle_sp */	1006	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	1007	if (expect_false (!next))
		1008	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1009	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1010	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1011	}
675	else if (prev != next)	1012	else if (expect_true (prev != next))
676	{	1013	{
677	coro_cctx *prev__cctx;	1014	coro_cctx *prev__cctx;
678		1015
679	if (!prev->cctx)	1016	if (expect_false (prev->flags & CF_NEW))
680	{	1017	{
681	/* create a new empty context */	1018	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	1019	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	1020	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	1021	prev->flags |= CF_RUNNING;
685	}	1022	}
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		1023
693	prev->flags &= ~CF_RUNNING;	1024	prev->flags &= ~CF_RUNNING;
694	next->flags |= CF_RUNNING;	1025	next->flags |= CF_RUNNING;
695		1026
696	LOCK;	1027	LOCK;
697		1028
698	if (next->mainstack)	1029	if (expect_false (next->flags & CF_NEW))
699	{	1030	{
700	/* coroutine already started */	1031	/* need to start coroutine */
701	SAVE (prev, flags);	1032	next->flags &= ~CF_NEW;
702	LOAD (next);	1033	/* first get rid of the old state */
		1034	save_perl (aTHX_ prev);
		1035	/* setup coroutine call */
		1036	coro_setup (aTHX_ next);
703	}	1037	}
704	else	1038	else
705	{	1039	{
706	/* need to start coroutine */	1040	/* coroutine already started */
707	/* first get rid of the old state */	1041	save_perl (aTHX_ prev);
708	SAVE (prev, -1);	1042	load_perl (aTHX_ next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	1043	}
714		1044
715	prev__cctx = prev->cctx;	1045	prev__cctx = prev->cctx;
716		1046
717	/* possibly "free" the cctx */	1047	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	1048	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
719	{	1049	{
720	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1050	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721	assert (PL_top_env == prev__cctx->top_env);	1051	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1052
		1053	prev->cctx = 0;
		1054
		1055	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1056	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1057	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1058	next->cctx = cctx_get (aTHX);
722		1059
723	cctx_put (prev__cctx);	1060	cctx_put (prev__cctx);
724	prev->cctx = 0;
725	}	1061	}
726		1062
		1063	++next->usecount;
		1064
727	if (!next->cctx)	1065	if (expect_true (!next->cctx))
728	next->cctx = cctx_get ();	1066	next->cctx = cctx_get (aTHX);
729		1067
730	if (prev__cctx != next->cctx)	1068	if (expect_false (prev__cctx != next->cctx))
731	{	1069	{
732	assert ( prev__cctx->inuse);
733	assert (!next->cctx->inuse);
734
735	prev__cctx->inuse = 0;
736	next->cctx->inuse = 1;
737
738	prev__cctx->top_env = PL_top_env;	1070	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->cctx->top_env;	1071	PL_top_env = next->cctx->top_env;
740	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1072	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741	}	1073	}
742		1074
743	free_coro_mortal ();	1075	free_coro_mortal (aTHX);
744
745	UNLOCK;	1076	UNLOCK;
746	}	1077	}
747	}	1078	}
748		1079
749	struct transfer_args	1080	struct transfer_args
750	{	1081	{
751	struct coro *prev, *next;	1082	struct coro *prev, *next;
752	int flags;
753	};	1083	};
754		1084
755	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1085	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1086	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
756		1087
		1088	/** high level stuff ********************************************************/
		1089
757	static void	1090	static int
758	coro_state_destroy (struct coro *coro)	1091	coro_state_destroy (pTHX_ struct coro *coro)
759	{	1092	{
760	if (coro->refcnt--)	1093	if (coro->flags & CF_DESTROYED)
761	return;	1094	return 0;
762		1095
		1096	coro->flags |= CF_DESTROYED;
		1097
763	if (coro->flags & CF_RUNNING)	1098	if (coro->flags & CF_READY)
764	croak ("FATAL: tried to destroy currently running coroutine");	1099	{
		1100	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1101	/* alternative: look through all ready queues and remove the coro */
		1102	LOCK;
		1103	--coro_nready;
		1104	UNLOCK;
		1105	}
		1106	else
		1107	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
765		1108
766	if (coro->mainstack && coro->mainstack != main_mainstack)	1109	if (coro->mainstack && coro->mainstack != main_mainstack)
767	{	1110	{
768	struct coro temp;	1111	struct coro temp;
769		1112
770	SAVE ((&temp), TRANSFER_SAVE_ALL);	1113	if (coro->flags & CF_RUNNING)
771	LOAD (coro);	1114	croak ("FATAL: tried to destroy currently running coroutine");
772		1115
773	coro_destroy_stacks ();	1116	save_perl (aTHX_ &temp);
		1117	load_perl (aTHX_ coro);
774		1118
		1119	coro_destroy (aTHX_ coro);
		1120
775	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1121	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
776		1122
777	coro->mainstack = 0;	1123	coro->mainstack = 0;
778	}	1124	}
779		1125
780	cctx_free (coro->cctx);	1126	cctx_destroy (coro->cctx);
781	SvREFCNT_dec (coro->args);	1127	SvREFCNT_dec (coro->args);
782	Safefree (coro);	1128
		1129	if (coro->next) coro->next->prev = coro->prev;
		1130	if (coro->prev) coro->prev->next = coro->next;
		1131	if (coro == coro_first) coro_first = coro->next;
		1132
		1133	return 1;
783	}	1134	}
784		1135
785	static int	1136	static int
786	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1137	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
787	{	1138	{
788	struct coro *coro = (struct coro *)mg->mg_ptr;	1139	struct coro *coro = (struct coro *)mg->mg_ptr;
789	mg->mg_ptr = 0;	1140	mg->mg_ptr = 0;
790		1141
		1142	coro->hv = 0;
		1143
		1144	if (--coro->refcnt < 0)
		1145	{
791	coro_state_destroy (coro);	1146	coro_state_destroy (aTHX_ coro);
		1147	Safefree (coro);
		1148	}
792		1149
793	return 0;	1150	return 0;
794	}	1151	}
795		1152
796	static int	1153	static int
…		…
803	return 0;	1160	return 0;
804	}	1161	}
805		1162
806	static MGVTBL coro_state_vtbl = {	1163	static MGVTBL coro_state_vtbl = {
807	0, 0, 0, 0,	1164	0, 0, 0, 0,
808	coro_state_clear,	1165	coro_state_free,
809	0,	1166	0,
810	#ifdef MGf_DUP	1167	#ifdef MGf_DUP
811	coro_state_dup,	1168	coro_state_dup,
812	#else	1169	#else
813	# define MGf_DUP 0	1170	# define MGf_DUP 0
814	#endif	1171	#endif
815	};	1172	};
816		1173
817	static struct coro *
818	SvSTATE (SV *coro)
819	{
820	HV *stash;
821	MAGIC *mg;
822
823	if (SvROK (coro))
824	coro = SvRV (coro);
825
826	stash = SvSTASH (coro);
827	if (stash != coro_stash && stash != coro_state_stash)
828	{
829	/* very slow, but rare, check */
830	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
831	croak ("Coro::State object required");
832	}
833
834	mg = SvMAGIC (coro);
835	assert (mg->mg_type == PERL_MAGIC_ext);
836	return (struct coro *)mg->mg_ptr;
837	}
838
839	static void	1174	static void
840	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1175	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
841	{	1176	{
842	ta->prev = SvSTATE (prev);	1177	ta->prev = SvSTATE (prev_sv);
843	ta->next = SvSTATE (next);	1178	ta->next = SvSTATE (next_sv);
844	ta->flags = flags;	1179	TRANSFER_CHECK (*ta);
845	}	1180	}
846		1181
847	static void	1182	static void
848	api_transfer (SV *prev, SV *next, int flags)	1183	api_transfer (SV *prev_sv, SV *next_sv)
849	{	1184	{
850	dTHX;	1185	dTHX;
851	struct transfer_args ta;	1186	struct transfer_args ta;
852		1187
853	prepare_transfer (&ta, prev, next, flags);	1188	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
854	TRANSFER (ta);	1189	TRANSFER (ta);
855	}	1190	}
856		1191
857	/** Coro ********************************************************************/	1192	/** Coro ********************************************************************/
858		1193
859	#define PRIO_MAX 3
860	#define PRIO_HIGH 1
861	#define PRIO_NORMAL 0
862	#define PRIO_LOW -1
863	#define PRIO_IDLE -3
864	#define PRIO_MIN -4
865
866	/* for Coro.pm */
867	static GV *coro_current, *coro_idle;
868	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
869	static int coro_nready;
870
871	static void	1194	static void
872	coro_enq (SV *coro_sv)	1195	coro_enq (pTHX_ SV *coro_sv)
873	{	1196	{
874	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1197	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875	coro_nready++;
876	}	1198	}
877		1199
878	static SV *	1200	static SV *
879	coro_deq (int min_prio)	1201	coro_deq (pTHX_ int min_prio)
880	{	1202	{
881	int prio = PRIO_MAX - PRIO_MIN;	1203	int prio = PRIO_MAX - PRIO_MIN;
882		1204
883	min_prio -= PRIO_MIN;	1205	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1206	if (min_prio < 0)
885	min_prio = 0;	1207	min_prio = 0;
886		1208
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1209	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (AvFILLp (coro_ready [prio]) >= 0)	1210	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready [prio]);	1211	return av_shift (coro_ready [prio]);
892	}
893		1212
894	return 0;	1213	return 0;
895	}	1214	}
896		1215
897	static int	1216	static int
898	api_ready (SV *coro_sv)	1217	api_ready (SV *coro_sv)
899	{	1218	{
		1219	dTHX;
900	struct coro *coro;	1220	struct coro *coro;
901		1221
902	if (SvROK (coro_sv))	1222	if (SvROK (coro_sv))
903	coro_sv = SvRV (coro_sv);	1223	coro_sv = SvRV (coro_sv);
904		1224
905	coro = SvSTATE (coro_sv);	1225	coro = SvSTATE (coro_sv);
906		1226
907	if (coro->flags & CF_READY)	1227	if (coro->flags & CF_READY)
908	return 0;	1228	return 0;
909		1229
910	if (coro->flags & CF_RUNNING)
911	croak ("Coro::ready called on currently running coroutine");
912
913	coro->flags |= CF_READY;	1230	coro->flags |= CF_READY;
914		1231
915	LOCK;	1232	LOCK;
916	coro_enq (SvREFCNT_inc (coro_sv));	1233	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1234	++coro_nready;
917	UNLOCK;	1235	UNLOCK;
918		1236
919	return 1;	1237	return 1;
920	}	1238	}
921		1239
922	static int	1240	static int
923	api_is_ready (SV *coro_sv)	1241	api_is_ready (SV *coro_sv)
924	{	1242	{
		1243	dTHX;
925	return !!SvSTATE (coro_sv)->flags & CF_READY;	1244	return !!(SvSTATE (coro_sv)->flags & CF_READY);
926	}	1245	}
927		1246
928	static void	1247	static void
929	prepare_schedule (struct transfer_args *ta)	1248	prepare_schedule (pTHX_ struct transfer_args *ta)
930	{	1249	{
931	SV *current, *prev, *next;	1250	SV *prev_sv, *next_sv;
932
933	current = GvSV (coro_current);
934		1251
935	for (;;)	1252	for (;;)
936	{	1253	{
937	LOCK;	1254	LOCK;
938	next = coro_deq (PRIO_MIN);	1255	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1256
		1257	/* nothing to schedule: call the idle handler */
		1258	if (expect_false (!next_sv))
		1259	{
		1260	dSP;
		1261	UNLOCK;
		1262
		1263	ENTER;
		1264	SAVETMPS;
		1265
		1266	PUSHMARK (SP);
		1267	PUTBACK;
		1268	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1269
		1270	FREETMPS;
		1271	LEAVE;
		1272	continue;
		1273	}
		1274
		1275	ta->next = SvSTATE (next_sv);
		1276
		1277	/* cannot transfer to destroyed coros, skip and look for next */
		1278	if (expect_false (ta->next->flags & CF_DESTROYED))
		1279	{
		1280	UNLOCK;
		1281	SvREFCNT_dec (next_sv);
		1282	/* coro_nready is already taken care of by destroy */
		1283	continue;
		1284	}
		1285
		1286	--coro_nready;
939	UNLOCK;	1287	UNLOCK;
940
941	if (next)
942	break;	1288	break;
943
944	{
945	dSP;
946
947	ENTER;
948	SAVETMPS;
949
950	PUSHMARK (SP);
951	PUTBACK;
952	call_sv (GvSV (coro_idle), G_DISCARD);
953
954	FREETMPS;
955	LEAVE;
956	}	1289	}
957	}
958
959	prev = SvRV (current);
960	SvRV (current) = next;
961		1290
962	/* free this only after the transfer */	1291	/* free this only after the transfer */
		1292	prev_sv = SvRV (coro_current);
		1293	ta->prev = SvSTATE (prev_sv);
		1294	TRANSFER_CHECK (*ta);
		1295	assert (ta->next->flags & CF_READY);
		1296	ta->next->flags &= ~CF_READY;
		1297	SvRV_set (coro_current, next_sv);
		1298
963	LOCK;	1299	LOCK;
964	free_coro_mortal ();	1300	free_coro_mortal (aTHX);
		1301	coro_mortal = prev_sv;
965	UNLOCK;	1302	UNLOCK;
966	coro_mortal = prev;
967
968	ta->prev = SvSTATE (prev);
969	ta->next = SvSTATE (next);
970	ta->flags = TRANSFER_SAVE_ALL;
971
972	ta->next->flags &= ~CF_READY;
973	}	1303	}
974		1304
975	static void	1305	static void
976	prepare_cede (struct transfer_args *ta)	1306	prepare_cede (pTHX_ struct transfer_args *ta)
977	{	1307	{
978	api_ready (GvSV (coro_current));	1308	api_ready (coro_current);
979
980	prepare_schedule (ta);	1309	prepare_schedule (aTHX_ ta);
		1310	}
		1311
		1312	static int
		1313	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1314	{
		1315	if (coro_nready)
		1316	{
		1317	SV *prev = SvRV (coro_current);
		1318	prepare_schedule (aTHX_ ta);
		1319	api_ready (prev);
		1320	return 1;
		1321	}
		1322	else
		1323	return 0;
981	}	1324	}
982		1325
983	static void	1326	static void
984	api_schedule (void)	1327	api_schedule (void)
985	{	1328	{
986	dTHX;	1329	dTHX;
987	struct transfer_args ta;	1330	struct transfer_args ta;
988		1331
989	prepare_schedule (&ta);	1332	prepare_schedule (aTHX_ &ta);
990	TRANSFER (ta);	1333	TRANSFER (ta);
991	}	1334	}
992		1335
993	static void	1336	static int
994	api_cede (void)	1337	api_cede (void)
995	{	1338	{
996	dTHX;	1339	dTHX;
997	struct transfer_args ta;	1340	struct transfer_args ta;
998		1341
999	prepare_cede (&ta);	1342	prepare_cede (aTHX_ &ta);
		1343
		1344	if (expect_true (ta.prev != ta.next))
		1345	{
1000	TRANSFER (ta);	1346	TRANSFER (ta);
		1347	return 1;
		1348	}
		1349	else
		1350	return 0;
1001	}	1351	}
1002		1352
		1353	static int
		1354	api_cede_notself (void)
		1355	{
		1356	dTHX;
		1357	struct transfer_args ta;
		1358
		1359	if (prepare_cede_notself (aTHX_ &ta))
		1360	{
		1361	TRANSFER (ta);
		1362	return 1;
		1363	}
		1364	else
		1365	return 0;
		1366	}
		1367
		1368	static void
		1369	api_trace (SV *coro_sv, int flags)
		1370	{
		1371	dTHX;
		1372	struct coro *coro = SvSTATE (coro_sv);
		1373
		1374	if (flags & CC_TRACE)
		1375	{
		1376	if (!coro->cctx)
		1377	coro->cctx = cctx_new ();
		1378	else if (!(coro->cctx->flags & CC_TRACE))
		1379	croak ("cannot enable tracing on coroutine with custom stack");
		1380
		1381	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1382	}
		1383	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1384	{
		1385	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1386
		1387	if (coro->flags & CF_RUNNING)
		1388	PL_runops = RUNOPS_DEFAULT;
		1389	else
		1390	coro->runops = RUNOPS_DEFAULT;
		1391	}
		1392	}
		1393
1003	MODULE = Coro::State PACKAGE = Coro::State	1394	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1004		1395
1005	PROTOTYPES: DISABLE	1396	PROTOTYPES: DISABLE
1006		1397
1007	BOOT:	1398	BOOT:
1008	{	1399	{
1009	#ifdef USE_ITHREADS	1400	#ifdef USE_ITHREADS
1010	MUTEX_INIT (&coro_mutex);	1401	MUTEX_INIT (&coro_mutex);
1011	#endif	1402	#endif
1012	BOOT_PAGESIZE;	1403	BOOT_PAGESIZE;
1013		1404
		1405	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1406	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1407
1014	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1408	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015		1409
1016	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1410	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1017	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1411	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1018	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1412	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1413	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1019		1414
1020	main_mainstack = PL_mainstack;	1415	main_mainstack = PL_mainstack;
		1416	main_top_env = PL_top_env;
		1417
		1418	while (main_top_env->je_prev)
		1419	main_top_env = main_top_env->je_prev;
1021		1420
1022	coroapi.ver = CORO_API_VERSION;	1421	coroapi.ver = CORO_API_VERSION;
1023	coroapi.transfer = api_transfer;	1422	coroapi.transfer = api_transfer;
1024		1423
1025	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1424	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1032	struct coro *coro;	1431	struct coro *coro;
1033	HV *hv;	1432	HV *hv;
1034	int i;	1433	int i;
1035		1434
1036	Newz (0, coro, 1, struct coro);	1435	Newz (0, coro, 1, struct coro);
1037	coro->args = newAV ();	1436	coro->args = newAV ();
		1437	coro->flags = CF_NEW;
1038		1438
		1439	if (coro_first) coro_first->prev = coro;
		1440	coro->next = coro_first;
		1441	coro_first = coro;
		1442
1039	hv = newHV ();	1443	coro->hv = hv = newHV ();
1040	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1444	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1041	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1445	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042		1446
		1447	av_extend (coro->args, items - 1);
1043	for (i = 1; i < items; i++)	1448	for (i = 1; i < items; i++)
1044	av_push (coro->args, newSVsv (ST (i)));	1449	av_push (coro->args, newSVsv (ST (i)));
1045	}	1450	}
1046	OUTPUT:	1451	OUTPUT:
1047	RETVAL	1452	RETVAL
1048		1453
		1454	# these not obviously related functions are all rolled into the same xs
		1455	# function to increase chances that they all will call transfer with the same
		1456	# stack offset
1049	void	1457	void
1050	_set_stacklevel (...)	1458	_set_stacklevel (...)
1051	ALIAS:	1459	ALIAS:
1052	Coro::State::transfer = 1	1460	Coro::State::transfer = 1
1053	Coro::schedule = 2	1461	Coro::schedule = 2
1054	Coro::cede = 3	1462	Coro::cede = 3
1055	Coro::Cont::yield = 4	1463	Coro::cede_notself = 4
1056	CODE:	1464	CODE:
1057	{	1465	{
1058	struct transfer_args ta;	1466	struct transfer_args ta;
1059		1467
1060	switch (ix)	1468	switch (ix)
1061	{	1469	{
1062	case 0:	1470	case 0:
1063	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1471	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1064	ta.next = 0;	1472	ta.next = 0;
1065	ta.flags = TRANSFER_SET_STACKLEVEL;
1066	break;	1473	break;
1067		1474
1068	case 1:	1475	case 1:
1069	if (items != 3)	1476	if (items != 2)
1070	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1477	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1071		1478
1072	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1479	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1073	break;	1480	break;
1074		1481
1075	case 2:	1482	case 2:
1076	prepare_schedule (&ta);	1483	prepare_schedule (aTHX_ &ta);
1077	break;	1484	break;
1078		1485
1079	case 3:	1486	case 3:
1080	prepare_cede (&ta);	1487	prepare_cede (aTHX_ &ta);
1081	break;	1488	break;
1082		1489
1083	case 4:	1490	case 4:
1084	{	1491	if (!prepare_cede_notself (aTHX_ &ta))
1085	SV *yieldstack;	1492	XSRETURN_EMPTY;
1086	SV *sv;
1087	AV *defav = GvAV (PL_defgv);
1088		1493
1089	yieldstack = *hv_fetch (
1090	(HV *)SvRV (GvSV (coro_current)),
1091	"yieldstack", sizeof ("yieldstack") - 1,
1092	0
1093	);
1094
1095	/* set up @_ -- ugly */
1096	av_clear (defav);
1097	av_fill (defav, items - 1);
1098	while (items--)
1099	av_store (defav, items, SvREFCNT_inc (ST(items)));
1100
1101	sv = av_pop ((AV *)SvRV (yieldstack));
1102	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1103	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1104	ta.flags = 0;
1105	SvREFCNT_dec (sv);
1106	}
1107	break;	1494	break;
1108
1109	}	1495	}
1110		1496
		1497	BARRIER;
1111	TRANSFER (ta);	1498	TRANSFER (ta);
1112	}
1113		1499
1114	void	1500	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1115	_clone_state_from (SV *dst, SV *src)	1501	XSRETURN_YES;
		1502	}
		1503
		1504	bool
		1505	_destroy (SV *coro_sv)
1116	CODE:	1506	CODE:
1117	{	1507	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1118	struct coro *coro_src = SvSTATE (src);	1508	OUTPUT:
1119		1509	RETVAL
1120	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1121
1122	++coro_src->refcnt;
1123	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1124	}
1125		1510
1126	void	1511	void
1127	_exit (code)	1512	_exit (code)
1128	int code	1513	int code
1129	PROTOTYPE: $	1514	PROTOTYPE: $
1130	CODE:	1515	CODE:
1131	_exit (code);	1516	_exit (code);
1132		1517
1133	int	1518	int
		1519	cctx_stacksize (int new_stacksize = 0)
		1520	CODE:
		1521	RETVAL = coro_stacksize;
		1522	if (new_stacksize)
		1523	coro_stacksize = new_stacksize;
		1524	OUTPUT:
		1525	RETVAL
		1526
		1527	int
1134	cctx_count ()	1528	cctx_count ()
1135	CODE:	1529	CODE:
1136	RETVAL = cctx_count;	1530	RETVAL = cctx_count;
1137	OUTPUT:	1531	OUTPUT:
1138	RETVAL	1532	RETVAL
…		…
1142	CODE:	1536	CODE:
1143	RETVAL = cctx_idle;	1537	RETVAL = cctx_idle;
1144	OUTPUT:	1538	OUTPUT:
1145	RETVAL	1539	RETVAL
1146		1540
		1541	void
		1542	list ()
		1543	PPCODE:
		1544	{
		1545	struct coro *coro;
		1546	for (coro = coro_first; coro; coro = coro->next)
		1547	if (coro->hv)
		1548	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1549	}
		1550
		1551	void
		1552	call (Coro::State coro, SV *coderef)
		1553	ALIAS:
		1554	eval = 1
		1555	CODE:
		1556	{
		1557	if (coro->mainstack)
		1558	{
		1559	struct coro temp;
		1560	Zero (&temp, 1, struct coro);
		1561
		1562	if (!(coro->flags & CF_RUNNING))
		1563	{
		1564	save_perl (aTHX_ &temp);
		1565	load_perl (aTHX_ coro);
		1566	}
		1567
		1568	{
		1569	dSP;
		1570	ENTER;
		1571	SAVETMPS;
		1572	PUSHMARK (SP);
		1573	PUTBACK;
		1574	if (ix)
		1575	eval_sv (coderef, 0);
		1576	else
		1577	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1578	SPAGAIN;
		1579	FREETMPS;
		1580	LEAVE;
		1581	PUTBACK;
		1582	}
		1583
		1584	if (!(coro->flags & CF_RUNNING))
		1585	{
		1586	save_perl (aTHX_ coro);
		1587	load_perl (aTHX_ &temp);
		1588	}
		1589	}
		1590	}
		1591
		1592	SV *
		1593	is_ready (Coro::State coro)
		1594	PROTOTYPE: $
		1595	ALIAS:
		1596	is_ready = CF_READY
		1597	is_running = CF_RUNNING
		1598	is_new = CF_NEW
		1599	is_destroyed = CF_DESTROYED
		1600	CODE:
		1601	RETVAL = boolSV (coro->flags & ix);
		1602	OUTPUT:
		1603	RETVAL
		1604
		1605	void
		1606	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1607
		1608	SV *
		1609	has_stack (Coro::State coro)
		1610	PROTOTYPE: $
		1611	CODE:
		1612	RETVAL = boolSV (!!coro->cctx);
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	int
		1617	is_traced (Coro::State coro)
		1618	PROTOTYPE: $
		1619	CODE:
		1620	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	IV
		1625	rss (Coro::State coro)
		1626	PROTOTYPE: $
		1627	ALIAS:
		1628	usecount = 1
		1629	CODE:
		1630	switch (ix)
		1631	{
		1632	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1633	case 1: RETVAL = coro->usecount; break;
		1634	}
		1635	OUTPUT:
		1636	RETVAL
		1637
		1638
1147	MODULE = Coro::State PACKAGE = Coro	1639	MODULE = Coro::State PACKAGE = Coro
1148		1640
1149	BOOT:	1641	BOOT:
1150	{	1642	{
1151	int i;	1643	int i;
		1644
		1645	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1646	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1647	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1648
		1649	coro_current = get_sv ("Coro::current", FALSE);
		1650	SvREADONLY_on (coro_current);
1152		1651
1153	coro_stash = gv_stashpv ("Coro", TRUE);	1652	coro_stash = gv_stashpv ("Coro", TRUE);
1154		1653
1155	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1654	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1156	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1655	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1157	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1656	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1657	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1658	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1659	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161		1660
1162	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1163	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1164
1165	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1661	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166	coro_ready[i] = newAV ();	1662	coro_ready[i] = newAV ();
1167		1663
1168	{	1664	{
1169	SV *sv = perl_get_sv("Coro::API", 1);	1665	SV *sv = perl_get_sv("Coro::API", 1);
1170		1666
1171	coroapi.schedule = api_schedule;	1667	coroapi.schedule = api_schedule;
1172	coroapi.cede = api_cede;	1668	coroapi.cede = api_cede;
		1669	coroapi.cede_notself = api_cede_notself;
1173	coroapi.ready = api_ready;	1670	coroapi.ready = api_ready;
1174	coroapi.is_ready = api_is_ready;	1671	coroapi.is_ready = api_is_ready;
1175	coroapi.nready = &coro_nready;	1672	coroapi.nready = &coro_nready;
1176	coroapi.current = coro_current;	1673	coroapi.current = coro_current;
1177		1674
1178	GCoroAPI = &coroapi;	1675	GCoroAPI = &coroapi;
1179	sv_setiv (sv, (IV)&coroapi);	1676	sv_setiv (sv, (IV)&coroapi);
1180	SvREADONLY_on (sv);	1677	SvREADONLY_on (sv);
1181	}	1678	}
1182	}	1679	}
		1680
		1681	void
		1682	_set_current (SV *current)
		1683	PROTOTYPE: $
		1684	CODE:
		1685	SvREFCNT_dec (SvRV (coro_current));
		1686	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1183		1687
1184	int	1688	int
1185	prio (Coro::State coro, int newprio = 0)	1689	prio (Coro::State coro, int newprio = 0)
1186	ALIAS:	1690	ALIAS:
1187	nice = 1	1691	nice = 1
…		…
1190	RETVAL = coro->prio;	1694	RETVAL = coro->prio;
1191		1695
1192	if (items > 1)	1696	if (items > 1)
1193	{	1697	{
1194	if (ix)	1698	if (ix)
1195	newprio += coro->prio;	1699	newprio = coro->prio - newprio;
1196		1700
1197	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1701	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1702	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199		1703
1200	coro->prio = newprio;	1704	coro->prio = newprio;
1201	}	1705	}
1202	}	1706	}
		1707	OUTPUT:
		1708	RETVAL
1203		1709
1204	SV *	1710	SV *
1205	ready (SV *self)	1711	ready (SV *self)
1206	PROTOTYPE: $	1712	PROTOTYPE: $
1207	CODE:	1713	CODE:
1208	RETVAL = boolSV (api_ready (self));	1714	RETVAL = boolSV (api_ready (self));
1209	OUTPUT:	1715	OUTPUT:
1210	RETVAL	1716	RETVAL
1211		1717
1212	SV *
1213	is_ready (SV *self)
1214	PROTOTYPE: $
1215	CODE:
1216	RETVAL = boolSV (api_is_ready (self));
1217	OUTPUT:
1218	RETVAL
1219
1220	int	1718	int
1221	nready (...)	1719	nready (...)
1222	PROTOTYPE:	1720	PROTOTYPE:
1223	CODE:	1721	CODE:
1224	RETVAL = coro_nready;	1722	RETVAL = coro_nready;
1225	OUTPUT:	1723	OUTPUT:
1226	RETVAL	1724	RETVAL
1227		1725
		1726	# for async_pool speedup
		1727	void
		1728	_pool_1 (SV *cb)
		1729	CODE:
		1730	{
		1731	struct coro *coro = SvSTATE (coro_current);
		1732	HV *hv = (HV *)SvRV (coro_current);
		1733	AV *defav = GvAV (PL_defgv);
		1734	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1735	AV *invoke_av;
		1736	int i, len;
		1737
		1738	if (!invoke)
		1739	croak ("\3terminate\2\n");
		1740
		1741	SvREFCNT_dec (coro->saved_deffh);
		1742	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1743
		1744	hv_store (hv, "desc", sizeof ("desc") - 1,
		1745	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1746
		1747	invoke_av = (AV *)SvRV (invoke);
		1748	len = av_len (invoke_av);
		1749
		1750	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1751
		1752	if (len > 0)
		1753	{
		1754	av_fill (defav, len - 1);
		1755	for (i = 0; i < len; ++i)
		1756	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1757	}
		1758
		1759	SvREFCNT_dec (invoke);
		1760	}
		1761
		1762	void
		1763	_pool_2 (SV *cb)
		1764	CODE:
		1765	{
		1766	struct coro *coro = SvSTATE (coro_current);
		1767
		1768	sv_setsv (cb, &PL_sv_undef);
		1769
		1770	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1771	coro->saved_deffh = 0;
		1772
		1773	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1774	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1775	croak ("\3terminate\2\n");
		1776
		1777	av_clear (GvAV (PL_defgv));
		1778	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1779	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1780
		1781	coro->prio = 0;
		1782
		1783	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1784	api_trace (coro_current, 0);
		1785
		1786	av_push (av_async_pool, newSVsv (coro_current));
		1787	}
		1788
		1789
1228	MODULE = Coro::State PACKAGE = Coro::AIO	1790	MODULE = Coro::State PACKAGE = Coro::AIO
1229		1791
1230	SV *	1792	SV *
1231	_get_state ()	1793	_get_state ()
1232	CODE:	1794	CODE:
1233	{	1795	{
1234	struct {	1796	struct io_state *data;
1235	int errorno;
1236	int laststype;
1237	int laststatval;
1238	Stat_t statcache;
1239	} data;
1240		1797
		1798	RETVAL = newSV (sizeof (struct io_state));
		1799	data = (struct io_state *)SvPVX (RETVAL);
		1800	SvCUR_set (RETVAL, sizeof (struct io_state));
		1801	SvPOK_only (RETVAL);
		1802
1241	data.errorno = errno;	1803	data->errorno = errno;
1242	data.laststype = PL_laststype;	1804	data->laststype = PL_laststype;
1243	data.laststatval = PL_laststatval;	1805	data->laststatval = PL_laststatval;
1244	data.statcache = PL_statcache;	1806	data->statcache = PL_statcache;
1245
1246	RETVAL = newSVpvn ((char *)&data, sizeof data);
1247	}	1807	}
1248	OUTPUT:	1808	OUTPUT:
1249	RETVAL	1809	RETVAL
1250		1810
1251	void	1811	void
1252	_set_state (char *data_)	1812	_set_state (char *data_)
1253	PROTOTYPE: $	1813	PROTOTYPE: $
1254	CODE:	1814	CODE:
1255	{	1815	{
1256	struct {	1816	struct io_state *data = (void *)data_;
1257	int errorno;
1258	int laststype;
1259	int laststatval;
1260	Stat_t statcache;
1261	} *data = (void *)data_;
1262		1817
1263	errno = data->errorno;	1818	errno = data->errorno;
1264	PL_laststype = data->laststype;	1819	PL_laststype = data->laststype;
1265	PL_laststatval = data->laststatval;	1820	PL_laststatval = data->laststatval;
1266	PL_statcache = data->statcache;	1821	PL_statcache = data->statcache;
1267	}	1822	}
		1823

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