[ViewVC] Diff of: 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 1.198 by root, Sun Oct 7 03:58:37 2007 UTC

…		…
1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	\|\| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	12	#include <stdio.h>
41	#include <errno.h>	13	#include <errno.h>
42		14	#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		15
51	#ifdef HAVE_MMAP	16	#ifdef HAVE_MMAP
52	# include <unistd.h>	17	# include <unistd.h>
53	# include <sys/mman.h>	18	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	19	# ifndef MAP_ANONYMOUS
69	#else	34	#else
70	# define PAGESIZE 0	35	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	36	# define BOOT_PAGESIZE (void)0
72	#endif	37	#endif
73		38
74	/* The next macro should declare a variable stacklevel that contains and approximation	39	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	40	# include <valgrind/valgrind.h>
76	* and should be unique. */	41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	\|\| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
		56	# ifndef PL_ppaddr
		57	# define PL_ppaddr ppaddr
		58	# endif
		59	# ifndef call_sv
		60	# define call_sv perl_call_sv
		61	# endif
		62	# ifndef get_sv
		63	# define get_sv perl_get_sv
		64	# endif
		65	# ifndef get_cv
		66	# define get_cv perl_get_cv
		67	# endif
		68	# ifndef IS_PADGV
		69	# define IS_PADGV(v) 0
		70	# endif
		71	# ifndef IS_PADCONST
		72	# define IS_PADCONST(v) 0
		73	# endif
		74	#endif
		75
		76	/* 5.8.7 */
		77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
		89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		90	# undef CORO_STACKGUARD
		91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
79		106
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		108
82	#if __GNUC__ >= 3	109	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
84	#else	113	#else
85	# define attribute(x)	114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
86	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
87		121
88	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
89		123
90	#include "CoroAPI.h"	124	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		125
94	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	130	#else
99	# define LOCK (void)0	131	# define LOCK (void)0
100	# define UNLOCK (void)0	132	# define UNLOCK (void)0
101	#endif	133	#endif
102		134
		135	/* helper storage struct for Coro::AIO */
		136	struct io_state
		137	{
		138	int errorno;
		139	I32 laststype;
		140	int laststatval;
		141	Stat_t statcache;
		142	};
		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
104	static AV main_mainstack; / used to differentiate between $main and others */	146	static AV main_mainstack; / used to differentiate between $main and others */
		147	static JMPENV *main_top_env;
105	static HV coro_state_stash, coro_stash;	148	static HV coro_state_stash, coro_stash;
106	static SV coro_mortal; / will be freed after next transfer */	149	static SV coro_mortal; / will be freed after next transfer */
107		150
		151	static GV irsgv; / $/ */
		152	static GV stdoutgv; / STDOUT /
		153
		154	/* async_pool helper stuff */
		155	static SV *sv_pool_rss;
		156	static SV *sv_pool_size;
		157	static AV *av_async_pool;
		158
108	static struct coro_cctx *cctx_first;	159	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	160	static int cctx_count, cctx_idle;
		161
		162	enum {
		163	CC_MAPPED = 0x01,
		164	CC_NOREUSE = 0x02, /* throw this away after tracing */
		165	CC_TRACE = 0x04,
		166	CC_TRACE_SUB = 0x08, /* trace sub calls */
		167	CC_TRACE_LINE = 0x10, /* trace each statement */
		168	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		169	};
110		170
111	/* this is a structure representing a c-level coroutine */	171	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	172	typedef struct coro_cctx {
113	struct coro_cctx *next;	173	struct coro_cctx *next;
114		174
115	/* the stack */	175	/* the stack */
116	void *sptr;	176	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	177	size_t ssize;
118		178
119	/* cpu state */	179	/* cpu state */
120	void idle_sp; / sp of top-level transfer/schedule/cede call */	180	void idle_sp; / sp of top-level transfer/schedule/cede call */
		181	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	182	JMPENV *top_env;
122	coro_context cctx;	183	coro_context cctx;
123		184
124	int inuse;
125
126	#if USE_VALGRIND	185	#if CORO_USE_VALGRIND
127	int valgrind_id;	186	int valgrind_id;
128	#endif	187	#endif
		188	unsigned char flags;
129	} coro_cctx;	189	} coro_cctx;
130		190
131	enum {	191	enum {
132	CF_RUNNING, /* coroutine is running */	192	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	193	CF_READY = 0x0002, /* coroutine is ready */
		194	CF_NEW = 0x0004, /* has never been switched to */
		195	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	196	};
		197
		198	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		199	typedef struct {
		200	SV *defsv;
		201	AV *defav;
		202	SV *errsv;
		203	SV *irsgv;
		204	#define VAR(name,type) type name;
		205	# include "state.h"
		206	#undef VAR
		207	} perl_slots;
		208
		209	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
135		210
136	/* this is a structure representing a perl-level coroutine */	211	/* this is a structure representing a perl-level coroutine */
137	struct coro {	212	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	213	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	214	coro_cctx *cctx;
140		215
		216	/* process data */
		217	AV *mainstack;
		218	perl_slots slot; / basically the saved sp */
		219
141	/* data associated with this coroutine (initial args) */	220	/* data associated with this coroutine (initial args) */
142	AV *args;	221	AV *args;
143	int refcnt;	222	int refcnt;
144	int flags;	223	int flags; /* CF_ flags */
145		224
146	/* optionally saved, might be zero */	225	/* statistics */
147	AV *defav;	226	int usecount; /* number of transfers to this coro */
148	SV *defsv;
149	SV *errsv;
150
151	#define VAR(name,type) type name;
152	# include "state.h"
153	#undef VAR
154		227
155	/* coro process data */	228	/* coro process data */
156	int prio;	229	int prio;
		230	SV *throw;
		231
		232	/* async_pool */
		233	SV *saved_deffh;
		234
		235	/* linked list */
		236	struct coro next, prev;
		237	HV hv; / the perl hash associated with this coro, if any */
157	};	238	};
158		239
159	typedef struct coro *Coro__State;	240	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	241	typedef struct coro *Coro__State_or_hashref;
161		242
		243	/ Coro ******************************************************************/
		244
		245	#define PRIO_MAX 3
		246	#define PRIO_HIGH 1
		247	#define PRIO_NORMAL 0
		248	#define PRIO_LOW -1
		249	#define PRIO_IDLE -3
		250	#define PRIO_MIN -4
		251
		252	/* for Coro.pm */
		253	static SV *coro_current;
		254	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		255	static int coro_nready;
		256	static struct coro *coro_first;
		257
		258	/ lowlevel stuff ********************************************************/
		259
162	static AV *	260	static AV *
163	coro_clone_padlist (CV *cv)	261	coro_clone_padlist (pTHX_ CV *cv)
164	{	262	{
165	AV *padlist = CvPADLIST (cv);	263	AV *padlist = CvPADLIST (cv);
166	AV newpadlist, newpad;	264	AV newpadlist, newpad;
167		265
168	newpadlist = newAV ();	266	newpadlist = newAV ();
…		…
180		278
181	return newpadlist;	279	return newpadlist;
182	}	280	}
183		281
184	static void	282	static void
185	free_padlist (AV *padlist)	283	free_padlist (pTHX_ AV *padlist)
186	{	284	{
187	/* may be during global destruction */	285	/* may be during global destruction */
188	if (SvREFCNT (padlist))	286	if (SvREFCNT (padlist))
189	{	287	{
190	I32 i = AvFILLp (padlist);	288	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	309	AV *padlist;
212	AV av = (AV )mg->mg_obj;	310	AV av = (AV )mg->mg_obj;
213		311
214	/* casting is fun. */	312	/* casting is fun. */
215	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	313	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
216	free_padlist (padlist);	314	free_padlist (aTHX_ padlist);
217		315
218	SvREFCNT_dec (av);	316	SvREFCNT_dec (av);
219		317
220	return 0;	318	return 0;
221	}	319	}
…		…
229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	327	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230	? SvMAGIC (cv) \	328	? SvMAGIC (cv) \
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	329	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	330	: 0
233		331
		332	static struct coro *
		333	SvSTATE_ (pTHX_ SV *coro)
		334	{
		335	HV *stash;
		336	MAGIC *mg;
		337
		338	if (SvROK (coro))
		339	coro = SvRV (coro);
		340
		341	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		342	croak ("Coro::State object required");
		343
		344	stash = SvSTASH (coro);
		345	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		346	{
		347	/* very slow, but rare, check */
		348	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		349	croak ("Coro::State object required");
		350	}
		351
		352	mg = CORO_MAGIC (coro);
		353	return (struct coro *)mg->mg_ptr;
		354	}
		355
		356	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		357
234	/* the next two functions merely cache the padlists */	358	/* the next two functions merely cache the padlists */
235	static void	359	static void
236	get_padlist (CV *cv)	360	get_padlist (pTHX_ CV *cv)
237	{	361	{
238	MAGIC *mg = CORO_MAGIC (cv);	362	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	363	AV *av;
240		364
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	365	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	366	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	367	else
244	{	368	{
245	#if 0	369	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	370	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	371	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	372	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	373	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	374	SvREFCNT_dec (cp);
251	#else	375	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	376	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	377	#endif
254	}	378	}
255	}	379	}
256		380
257	static void	381	static void
258	put_padlist (CV *cv)	382	put_padlist (pTHX_ CV *cv)
259	{	383	{
260	MAGIC *mg = CORO_MAGIC (cv);	384	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	385	AV *av;
262		386
263	if (!mg)	387	if (expect_false (!mg))
264	{	388	{
265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	389	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	390	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267	mg->mg_virtual = &vtbl_coro;	391	mg->mg_virtual = &vtbl_coro;
268	mg->mg_obj = (SV *)newAV ();	392	mg->mg_obj = (SV *)newAV ();
269	}	393	}
270		394
271	av = (AV *)mg->mg_obj;	395	av = (AV *)mg->mg_obj;
272		396
273	if (AvFILLp (av) >= AvMAX (av))	397	if (expect_false (AvFILLp (av) >= AvMAX (av)))
274	av_extend (av, AvMAX (av) + 1);	398	av_extend (av, AvMAX (av) + 1);
275		399
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	400	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	401	}
278		402
279	#define SB do {	403	/ load & save, init *****************************************************/
280	#define SE } while (0)
281		404
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	405	static void
288	load_state(Coro__State c)	406	load_perl (pTHX_ Coro__State c)
289	{	407	{
		408	perl_slots *slot = c->slot;
		409	c->slot = 0;
		410
		411	PL_mainstack = c->mainstack;
		412
		413	GvSV (PL_defgv) = slot->defsv;
		414	GvAV (PL_defgv) = slot->defav;
		415	GvSV (PL_errgv) = slot->errsv;
		416	GvSV (irsgv) = slot->irsgv;
		417
290	#define VAR(name,type) PL_ ## name = c->name;	418	#define VAR(name,type) PL_ ## name = slot->name;
291	# include "state.h"	419	# include "state.h"
292	#undef VAR	420	#undef VAR
293
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
297		421
298	{	422	{
299	dSP;	423	dSP;
		424
300	CV *cv;	425	CV *cv;
301		426
302	/* now do the ugly restore mess */	427	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	428	while (expect_true (cv = (CV *)POPs))
304	{	429	{
305	put_padlist (cv); /* mark this padlist as available */	430	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	431	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	432	CvPADLIST (cv) = (AV *)POPs;
308	}	433	}
309		434
310	PUTBACK;	435	PUTBACK;
311	}	436	}
312	}	437	}
313		438
314	static void	439	static void
315	save_state(Coro__State c, int flags)	440	save_perl (pTHX_ Coro__State c)
316	{	441	{
317	{	442	{
318	dSP;	443	dSP;
319	I32 cxix = cxstack_ix;	444	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	445	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	448	/*
324	* the worst thing you can imagine happens first - we have to save	449	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	450	* (and reinitialize) all cv's in the whole callchain :(
326	*/	451	*/
327		452
328	PUSHs (Nullsv);	453	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	454	/* this loop was inspired by pp_caller */
330	for (;;)	455	for (;;)
331	{	456	{
332	while (cxix >= 0)	457	while (expect_true (cxix >= 0))
333	{	458	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	459	PERL_CONTEXT *cx = &ccstk[cxix--];
335		460
336	if (CxTYPE(cx) == CXt_SUB)	461	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
337	{	462	{
338	CV *cv = cx->blk_sub.cv;	463	CV *cv = cx->blk_sub.cv;
339		464
340	if (CvDEPTH (cv))	465	if (expect_true (CvDEPTH (cv)))
341	{	466	{
342	EXTEND (SP, 3);	467	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	468	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	469	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	470	PUSHs ((SV *)cv);
347		471
348	CvDEPTH (cv) = 0;	472	CvDEPTH (cv) = 0;
349	get_padlist (cv);	473	get_padlist (aTHX_ cv);
350	}	474	}
351	}	475	}
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	}	476	}
361		477
362	if (top_si->si_type == PERLSI_MAIN)	478	if (expect_true (top_si->si_type == PERLSI_MAIN))
363	break;	479	break;
364		480
365	top_si = top_si->si_prev;	481	top_si = top_si->si_prev;
366	ccstk = top_si->si_cxstack;	482	ccstk = top_si->si_cxstack;
367	cxix = top_si->si_cxix;	483	cxix = top_si->si_cxix;
368	}	484	}
369		485
370	PUTBACK;	486	PUTBACK;
371	}	487	}
372		488
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	489	/* allocate some space on the context stack for our purposes */
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	490	{
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	491	/* we manually unroll here, as usually 2 slots is enough */
		492	int i;
		493	if (SLOT_COUNT >= 1) CXINC;
		494	if (SLOT_COUNT >= 2) CXINC;
		495	if (SLOT_COUNT >= 3) CXINC;
		496	for (i = 3; i < SLOT_COUNT; ++i)
		497	CXINC;
376		498
		499	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		500	}
		501
		502	c->mainstack = PL_mainstack;
		503
		504	{
		505	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		506
		507	slot->defav = GvAV (PL_defgv);
		508	slot->defsv = DEFSV;
		509	slot->errsv = ERRSV;
		510	slot->irsgv = GvSV (irsgv);
		511
377	#define VAR(name,type)c->name = PL_ ## name;	512	#define VAR(name,type) slot->name = PL_ ## name;
378	# include "state.h"	513	# include "state.h"
379	#undef VAR	514	#undef VAR
		515	}
380	}	516	}
381		517
382	/*	518	/*
383	* allocate various perl stacks. This is an exact copy	519	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	520	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	521	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	522	* not usually need a lot of stackspace.
387	*/	523	*/
		524	#if CORO_PREFER_PERL_FUNCTIONS
		525	# define coro_init_stacks init_stacks
		526	#else
388	static void	527	static void
389	coro_init_stacks ()	528	coro_init_stacks (pTHX)
390	{	529	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	530	PL_curstackinfo = new_stackinfo(32, 8);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	531	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	532	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	533	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		534
396	PL_stack_base = AvARRAY(PL_curstack);	535	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	536	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	537	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		538
400	New(50,PL_tmps_stack,96,SV*);	539	New(50,PL_tmps_stack,32,SV*);
401	PL_tmps_floor = -1;	540	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	541	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	542	PL_tmps_max = 32;
404		543
405	New(54,PL_markstack,16,I32);	544	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	545	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	546	PL_markstack_max = PL_markstack + 16;
408		547
409	#ifdef SET_MARK_OFFSET	548	#ifdef SET_MARK_OFFSET
410	SET_MARK_OFFSET;	549	SET_MARK_OFFSET;
411	#endif	550	#endif
412		551
413	New(54,PL_scopestack,16,I32);	552	New(54,PL_scopestack,8,I32);
414	PL_scopestack_ix = 0;	553	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	554	PL_scopestack_max = 8;
416		555
417	New(54,PL_savestack,96,ANY);	556	New(54,PL_savestack,24,ANY);
418	PL_savestack_ix = 0;	557	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	558	PL_savestack_max = 24;
420		559
421	#if !PERL_VERSION_ATLEAST (5,9,0)	560	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	561	New(54,PL_retstack,4,OP*);
423	PL_retstack_ix = 0;	562	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	563	PL_retstack_max = 4;
425	#endif	564	#endif
426	}	565	}
		566	#endif
427		567
428	/*	568	/*
429	* destroy the stacks, the callchain etc...	569	* destroy the stacks, the callchain etc...
430	*/	570	*/
431	static void	571	static void
432	coro_destroy_stacks ()	572	coro_destroy_stacks (pTHX)
433	{	573	{
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)	574	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	575	PL_curstackinfo = PL_curstackinfo->si_next;
447		576
448	while (PL_curstackinfo)	577	while (PL_curstackinfo)
449	{	578	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	579	PERL_SI *p = PL_curstackinfo->si_prev;
451		580
452	{ /D//remove/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	581	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/D//remove/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	582	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		583
464	Safefree (PL_curstackinfo->si_cxstack);	584	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	585	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	586	PL_curstackinfo = p;
467	}	587	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	593	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	594	Safefree (PL_retstack);
475	#endif	595	#endif
476	}	596	}
477		597
478	static void	598	static size_t
479	setup_coro (struct coro *coro)	599	coro_rss (pTHX_ struct coro *coro)
		600	{
		601	size_t rss = sizeof (*coro);
		602
		603	if (coro->mainstack)
		604	{
		605	perl_slots tmp_slot;
		606	perl_slots *slot;
		607
		608	if (coro->flags & CF_RUNNING)
		609	{
		610	slot = &tmp_slot;
		611
		612	#define VAR(name,type) slot->name = PL_ ## name;
		613	# include "state.h"
		614	#undef VAR
		615	}
		616	else
		617	slot = coro->slot;
		618
		619	rss += sizeof (slot->curstackinfo);
		620	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		621	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		622	rss += slot->tmps_max * sizeof (SV *);
		623	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		624	rss += slot->scopestack_max * sizeof (I32);
		625	rss += slot->savestack_max * sizeof (ANY);
		626
		627	#if !PERL_VERSION_ATLEAST (5,9,0)
		628	rss += slot->retstack_max * sizeof (OP *);
		629	#endif
		630	}
		631
		632	return rss;
		633	}
		634
		635	/ coroutine stack handling **********************************************/
		636
		637	static void
		638	coro_setup (pTHX_ struct coro *coro)
480	{	639	{
481	/*	640	/*
482	* emulate part of the perl startup here.	641	* emulate part of the perl startup here.
483	*/	642	*/
484
485	coro_init_stacks ();	643	coro_init_stacks (aTHX);
486		644
		645	PL_runops = RUNOPS_DEFAULT;
		646	PL_curcop = &PL_compiling;
		647	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	648	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	649	PL_curpm = 0;
		650	PL_curpad = 0;
		651	PL_localizing = 0;
		652	PL_dirty = 0;
		653	PL_restartop = 0;
		654	PL_diehook = 0;
		655	PL_warnhook = 0;
		656
		657	GvSV (PL_defgv) = newSV (0);
		658	GvAV (PL_defgv) = coro->args; coro->args = 0;
		659	GvSV (PL_errgv) = newSV (0);
		660	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		661	PL_rs = newSVsv (GvSV (irsgv));
		662	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
490		663
491	{	664	{
492	dSP;	665	dSP;
493	LOGOP myop;	666	LOGOP myop;
494		667
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);	668	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	669	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	670	myop.op_flags = OPf_WANT_VOID;
504		671
		672	PUSHMARK (SP);
		673	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		674	PUTBACK;
505	PL_op = (OP *)&myop;	675	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);	676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	677	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	678	}
515	}
516		679
		680	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		681	}
		682
517	static void	683	static void
		684	coro_destroy (pTHX_ struct coro *coro)
		685	{
		686	if (!IN_DESTRUCT)
		687	{
		688	/* restore all saved variables and stuff */
		689	LEAVE_SCOPE (0);
		690	assert (PL_tmps_floor == -1);
		691
		692	/* free all temporaries */
		693	FREETMPS;
		694	assert (PL_tmps_ix == -1);
		695
		696	/* unwind all extra stacks */
		697	POPSTACK_TO (PL_mainstack);
		698
		699	/* unwind main stack */
		700	dounwind (-1);
		701	}
		702
		703	SvREFCNT_dec (GvSV (PL_defgv));
		704	SvREFCNT_dec (GvAV (PL_defgv));
		705	SvREFCNT_dec (GvSV (PL_errgv));
		706	SvREFCNT_dec (PL_defoutgv);
		707	SvREFCNT_dec (PL_rs);
		708	SvREFCNT_dec (GvSV (irsgv));
		709
		710	SvREFCNT_dec (PL_diehook);
		711	SvREFCNT_dec (PL_warnhook);
		712
		713	SvREFCNT_dec (coro->saved_deffh);
		714	SvREFCNT_dec (coro->throw);
		715
		716	coro_destroy_stacks (aTHX);
		717	}
		718
		719	static void
518	free_coro_mortal ()	720	free_coro_mortal (pTHX)
519	{	721	{
520	if (coro_mortal)	722	if (expect_true (coro_mortal))
521	{	723	{
522	SvREFCNT_dec (coro_mortal);	724	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	725	coro_mortal = 0;
524	}	726	}
525	}	727	}
526		728
		729	static int
		730	runops_trace (pTHX)
		731	{
		732	COP *oldcop = 0;
		733	int oldcxix = -2;
		734	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		735	coro_cctx *cctx = coro->cctx;
		736
		737	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		738	{
		739	PERL_ASYNC_CHECK ();
		740
		741	if (cctx->flags & CC_TRACE_ALL)
		742	{
		743	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		744	{
		745	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		746	SV bot, top;
		747	AV av = newAV (); / return values */
		748	SV **cb;
		749	dSP;
		750
		751	GV *gv = CvGV (cx->blk_sub.cv);
		752	SV *fullname = sv_2mortal (newSV (0));
		753	if (isGV (gv))
		754	gv_efullname3 (fullname, gv, 0);
		755
		756	bot = PL_stack_base + cx->blk_oldsp + 1;
		757	top = cx->blk_gimme == G_ARRAY ? SP + 1
		758	: cx->blk_gimme == G_SCALAR ? bot + 1
		759	: bot;
		760
		761	av_extend (av, top - bot);
		762	while (bot < top)
		763	av_push (av, SvREFCNT_inc (*bot++));
		764
		765	PL_runops = RUNOPS_DEFAULT;
		766	ENTER;
		767	SAVETMPS;
		768	EXTEND (SP, 3);
		769	PUSHMARK (SP);
		770	PUSHs (&PL_sv_no);
		771	PUSHs (fullname);
		772	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		773	PUTBACK;
		774	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		775	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		776	SPAGAIN;
		777	FREETMPS;
		778	LEAVE;
		779	PL_runops = runops_trace;
		780	}
		781
		782	if (oldcop != PL_curcop)
		783	{
		784	oldcop = PL_curcop;
		785
		786	if (PL_curcop != &PL_compiling)
		787	{
		788	SV **cb;
		789
		790	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		791	{
		792	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		793
		794	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		795	{
		796	runops_proc_t old_runops = PL_runops;
		797	dSP;
		798	GV *gv = CvGV (cx->blk_sub.cv);
		799	SV *fullname = sv_2mortal (newSV (0));
		800
		801	if (isGV (gv))
		802	gv_efullname3 (fullname, gv, 0);
		803
		804	PL_runops = RUNOPS_DEFAULT;
		805	ENTER;
		806	SAVETMPS;
		807	EXTEND (SP, 3);
		808	PUSHMARK (SP);
		809	PUSHs (&PL_sv_yes);
		810	PUSHs (fullname);
		811	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		812	PUTBACK;
		813	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		814	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		815	SPAGAIN;
		816	FREETMPS;
		817	LEAVE;
		818	PL_runops = runops_trace;
		819	}
		820
		821	oldcxix = cxstack_ix;
		822	}
		823
		824	if (cctx->flags & CC_TRACE_LINE)
		825	{
		826	dSP;
		827
		828	PL_runops = RUNOPS_DEFAULT;
		829	ENTER;
		830	SAVETMPS;
		831	EXTEND (SP, 3);
		832	PL_runops = RUNOPS_DEFAULT;
		833	PUSHMARK (SP);
		834	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		835	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		836	PUTBACK;
		837	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		838	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		839	SPAGAIN;
		840	FREETMPS;
		841	LEAVE;
		842	PL_runops = runops_trace;
		843	}
		844	}
		845	}
		846	}
		847	}
		848
		849	TAINT_NOT;
		850	return 0;
		851	}
		852
		853	/* inject a fake call to Coro::State::_cctx_init into the execution */
		854	/* _cctx_init should be careful, as it could be called at almost any time */
		855	/* during execution of a perl program */
527	static void NOINLINE	856	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	857	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	858	{
530	dSP;	859	dSP;
531	LOGOP myop;	860	LOGOP myop;
532		861
		862	PL_top_env = &PL_start_env;
		863
		864	if (cctx->flags & CC_TRACE)
		865	PL_runops = runops_trace;
		866
533	Zero (&myop, 1, LOGOP);	867	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	868	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	869	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		870
539	PUSHMARK (SP);	871	PUSHMARK (SP);
		872	EXTEND (SP, 2);
		873	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	874	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	875	PUTBACK;
		876	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	877	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	878	SPAGAIN;
544	}	879	}
545		880
		881	/*
		882	* this is a _very_ stripped down perl interpreter ;)
		883	*/
546	static void	884	static void
547	coro_run (void *arg)	885	coro_run (void *arg)
548	{	886	{
		887	dTHX;
		888
549	/* coro_run is the alternative epilogue of transfer() */	889	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	890	UNLOCK;
551		891
		892	/* we now skip the entersub that lead to transfer() */
		893	PL_op = PL_op->op_next;
		894
		895	/* inject a fake subroutine call to cctx_init */
		896	prepare_cctx (aTHX_ (coro_cctx *)arg);
		897
		898	/* somebody or something will hit me for both perl_run and PL_restartop */
		899	PL_restartop = PL_op;
		900	perl_run (PL_curinterp);
		901
552	/*	902	/*
553	* this is a _very_ stripped down perl interpreter ;)	903	* If perl-run returns we assume exit() was being called or the coro
		904	* fell off the end, which seems to be the only valid (non-bug)
		905	* reason for perl_run to return. We try to exit by jumping to the
		906	* bootstrap-time "top" top_env, as we cannot restore the "main"
		907	* coroutine as Coro has no such concept
554	*/	908	*/
555	PL_top_env = &PL_start_env;	909	PL_top_env = main_top_env;
556		910	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	}	911	}
566		912
567	static coro_cctx *	913	static coro_cctx *
568	cctx_new ()	914	cctx_new ()
569	{	915	{
570	coro_cctx *cctx;	916	coro_cctx *cctx;
		917	void *stack_start;
		918	size_t stack_size;
571		919
572	++cctx_count;	920	++cctx_count;
573		921
574	New (0, cctx, 1, coro_cctx);	922	Newz (0, cctx, 1, coro_cctx);
575		923
576	#if HAVE_MMAP	924	#if HAVE_MMAP
577		925
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	926	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	927	/* 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);	928	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
581		929
582	if (cctx->sptr == (void *)-1)	930	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	931	{
587
588	# if STACKGUARD	932	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	933	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	934	# endif
		935	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		936	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		937	cctx->flags \|= CC_MAPPED;
		938	}
		939	else
		940	#endif
		941	{
		942	cctx->ssize = coro_stacksize * (long)sizeof (long);
		943	New (0, cctx->sptr, coro_stacksize, long);
591		944
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	945	if (!cctx->sptr)
598	{	946	{
599	perror ("FATAL: unable to malloc stack for coroutine");	947	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	948	_exit (EXIT_FAILURE);
601	}	949	}
602		950
603	#endif	951	stack_start = cctx->sptr;
		952	stack_size = cctx->ssize;
		953	}
604		954
605	#if USE_VALGRIND	955	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);	956	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
613		957
614	return cctx;	958	return cctx;
615	}	959	}
616		960
617	static void	961	static void
618	cctx_free (coro_cctx *cctx)	962	cctx_destroy (coro_cctx *cctx)
619	{	963	{
620	if (!cctx)	964	if (!cctx)
621	return;	965	return;
622		966
623	--cctx_count;	967	--cctx_count;
624		968
625	#if USE_VALGRIND	969	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	970	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	971	#endif
628		972
629	#if HAVE_MMAP	973	#if HAVE_MMAP
		974	if (cctx->flags & CC_MAPPED)
630	munmap (cctx->sptr, cctx->ssize);	975	munmap (cctx->sptr, cctx->ssize);
631	#else	976	else
		977	#endif
632	Safefree (cctx->sptr);	978	Safefree (cctx->sptr);
633	#endif
634		979
635	Safefree (cctx);	980	Safefree (cctx);
636	}	981	}
637		982
		983	/* wether this cctx should be destructed */
		984	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		985
638	static coro_cctx *	986	static coro_cctx *
639	cctx_get ()	987	cctx_get (pTHX)
640	{	988	{
641	coro_cctx *cctx;	989	while (expect_true (cctx_first))
642
643	if (cctx_first)
644	{	990	{
		991	coro_cctx *cctx = cctx_first;
		992	cctx_first = cctx->next;
645	--cctx_idle;	993	--cctx_idle;
646	cctx = cctx_first;	994
647	cctx_first = cctx->next;	995	if (expect_true (!CCTX_EXPIRED (cctx)))
648	}	996	return cctx;
649	else	997
650	{	998	cctx_destroy (cctx);
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;
653	}	999	}
654		1000
655	return cctx;	1001	return cctx_new ();
656	}	1002	}
657		1003
658	static void	1004	static void
659	cctx_put (coro_cctx *cctx)	1005	cctx_put (coro_cctx *cctx)
660	{	1006	{
		1007	/* free another cctx if overlimit */
		1008	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1009	{
		1010	coro_cctx *first = cctx_first;
		1011	cctx_first = first->next;
		1012	--cctx_idle;
		1013
		1014	cctx_destroy (first);
		1015	}
		1016
661	++cctx_idle;	1017	++cctx_idle;
662	cctx->next = cctx_first;	1018	cctx->next = cctx_first;
663	cctx_first = cctx;	1019	cctx_first = cctx;
664	}	1020	}
665		1021
666	/* never call directly, always through the coro_state_transfer global variable */	1022	/ coroutine switching ***************************************************/
		1023
		1024	static void
		1025	transfer_check (pTHX_ struct coro prev, struct coro next)
		1026	{
		1027	if (expect_true (prev != next))
		1028	{
		1029	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1030	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1031
		1032	if (expect_false (next->flags & CF_RUNNING))
		1033	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1034
		1035	if (expect_false (next->flags & CF_DESTROYED))
		1036	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1037
		1038	if (
		1039	#if PERL_VERSION_ATLEAST (5,9,0)
		1040	expect_false (PL_parser)
		1041	#else
		1042	expect_false (PL_lex_state != LEX_NOTPARSING)
		1043	#endif
		1044	)
		1045	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1046	}
		1047	}
		1048
		1049	/* always use the TRANSFER macro */
667	static void NOINLINE	1050	static void NOINLINE
668	transfer (struct coro prev, struct coro next, int flags)	1051	transfer (pTHX_ struct coro prev, struct coro next)
669	{	1052	{
670	dSTACKLEVEL;	1053	dSTACKLEVEL;
671		1054
672	/* sometimes transfer is only called to set idle_sp */	1055	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	1056	if (expect_false (!next))
		1057	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1058	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1059	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1060	}
675	else if (prev != next)	1061	else if (expect_true (prev != next))
676	{	1062	{
677	coro_cctx *prev__cctx;	1063	coro_cctx *prev__cctx;
678		1064
679	if (!prev->cctx)	1065	if (expect_false (prev->flags & CF_NEW))
680	{	1066	{
681	/* create a new empty context */	1067	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	1068	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	1069	prev->flags &= ~CF_NEW;
684	prev->flags \|= CF_RUNNING;	1070	prev->flags \|= CF_RUNNING;
685	}	1071	}
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		1072
693	prev->flags &= ~CF_RUNNING;	1073	prev->flags &= ~CF_RUNNING;
694	next->flags \|= CF_RUNNING;	1074	next->flags \|= CF_RUNNING;
695		1075
696	LOCK;	1076	LOCK;
697		1077
698	if (next->mainstack)	1078	if (expect_false (next->flags & CF_NEW))
699	{	1079	{
700	/* coroutine already started */	1080	/* need to start coroutine */
701	SAVE (prev, flags);	1081	next->flags &= ~CF_NEW;
702	LOAD (next);	1082	/* first get rid of the old state */
		1083	save_perl (aTHX_ prev);
		1084	/* setup coroutine call */
		1085	coro_setup (aTHX_ next);
703	}	1086	}
704	else	1087	else
705	{	1088	{
706	/* need to start coroutine */	1089	/* coroutine already started */
707	/* first get rid of the old state */	1090	save_perl (aTHX_ prev);
708	SAVE (prev, -1);	1091	load_perl (aTHX_ next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	1092	}
714		1093
715	prev__cctx = prev->cctx;	1094	prev__cctx = prev->cctx;
716		1095
717	/* possibly "free" the cctx */	1096	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	1097	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
719	{	1098	{
720	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1099	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721	assert (PL_top_env == prev__cctx->top_env);	1100	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1101
		1102	prev->cctx = 0;
		1103
		1104	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1105	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1106	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1107	next->cctx = cctx_get (aTHX);
722		1108
723	cctx_put (prev__cctx);	1109	cctx_put (prev__cctx);
724	prev->cctx = 0;
725	}	1110	}
726		1111
		1112	++next->usecount;
		1113
727	if (!next->cctx)	1114	if (expect_true (!next->cctx))
728	next->cctx = cctx_get ();	1115	next->cctx = cctx_get (aTHX);
729		1116
730	if (prev__cctx != next->cctx)	1117	if (expect_false (prev__cctx != next->cctx))
731	{	1118	{
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;	1119	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->cctx->top_env;	1120	PL_top_env = next->cctx->top_env;
740	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1121	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741	}	1122	}
742		1123
743	free_coro_mortal ();	1124	free_coro_mortal (aTHX);
744
745	UNLOCK;	1125	UNLOCK;
		1126
		1127	if (expect_false (prev->throw \|\| next->throw))
		1128	{
		1129	struct coro *coro = SvSTATE (coro_current);
		1130
		1131	if (coro->throw)
		1132	{
		1133	SV *exception = coro->throw;
		1134	coro->throw = 0;
		1135	sv_setsv (ERRSV, exception);
		1136	croak (0);
		1137	}
		1138	}
746	}	1139	}
747	}	1140	}
748		1141
749	struct transfer_args	1142	struct transfer_args
750	{	1143	{
751	struct coro prev, next;	1144	struct coro prev, next;
752	int flags;
753	};	1145	};
754		1146
755	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1147	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1148	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
756		1149
		1150	/ high level stuff ******************************************************/
		1151
757	static void	1152	static int
758	coro_state_destroy (struct coro *coro)	1153	coro_state_destroy (pTHX_ struct coro *coro)
759	{	1154	{
760	if (coro->refcnt--)	1155	if (coro->flags & CF_DESTROYED)
761	return;	1156	return 0;
762		1157
		1158	coro->flags \|= CF_DESTROYED;
		1159
763	if (coro->flags & CF_RUNNING)	1160	if (coro->flags & CF_READY)
764	croak ("FATAL: tried to destroy currently running coroutine");	1161	{
		1162	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1163	/* alternative: look through all ready queues and remove the coro */
		1164	LOCK;
		1165	--coro_nready;
		1166	UNLOCK;
		1167	}
		1168	else
		1169	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
765		1170
766	if (coro->mainstack && coro->mainstack != main_mainstack)	1171	if (coro->mainstack && coro->mainstack != main_mainstack)
767	{	1172	{
768	struct coro temp;	1173	struct coro temp;
769		1174
770	SAVE ((&temp), TRANSFER_SAVE_ALL);	1175	if (coro->flags & CF_RUNNING)
771	LOAD (coro);	1176	croak ("FATAL: tried to destroy currently running coroutine");
772		1177
773	coro_destroy_stacks ();	1178	save_perl (aTHX_ &temp);
		1179	load_perl (aTHX_ coro);
774		1180
775	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1181	coro_destroy (aTHX_ coro);
776		1182
		1183	load_perl (aTHX_ &temp);
		1184
777	coro->mainstack = 0;	1185	coro->slot = 0;
778	}	1186	}
779		1187
780	cctx_free (coro->cctx);	1188	cctx_destroy (coro->cctx);
781	SvREFCNT_dec (coro->args);	1189	SvREFCNT_dec (coro->args);
782	Safefree (coro);	1190
		1191	if (coro->next) coro->next->prev = coro->prev;
		1192	if (coro->prev) coro->prev->next = coro->next;
		1193	if (coro == coro_first) coro_first = coro->next;
		1194
		1195	return 1;
783	}	1196	}
784		1197
785	static int	1198	static int
786	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1199	coro_state_free (pTHX_ SV sv, MAGIC mg)
787	{	1200	{
788	struct coro coro = (struct coro )mg->mg_ptr;	1201	struct coro coro = (struct coro )mg->mg_ptr;
789	mg->mg_ptr = 0;	1202	mg->mg_ptr = 0;
790		1203
		1204	coro->hv = 0;
		1205
		1206	if (--coro->refcnt < 0)
		1207	{
791	coro_state_destroy (coro);	1208	coro_state_destroy (aTHX_ coro);
		1209	Safefree (coro);
		1210	}
792		1211
793	return 0;	1212	return 0;
794	}	1213	}
795		1214
796	static int	1215	static int
…		…
803	return 0;	1222	return 0;
804	}	1223	}
805		1224
806	static MGVTBL coro_state_vtbl = {	1225	static MGVTBL coro_state_vtbl = {
807	0, 0, 0, 0,	1226	0, 0, 0, 0,
808	coro_state_clear,	1227	coro_state_free,
809	0,	1228	0,
810	#ifdef MGf_DUP	1229	#ifdef MGf_DUP
811	coro_state_dup,	1230	coro_state_dup,
812	#else	1231	#else
813	# define MGf_DUP 0	1232	# define MGf_DUP 0
814	#endif	1233	#endif
815	};	1234	};
816		1235
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	1236	static void
840	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1237	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
841	{	1238	{
842	ta->prev = SvSTATE (prev);	1239	ta->prev = SvSTATE (prev_sv);
843	ta->next = SvSTATE (next);	1240	ta->next = SvSTATE (next_sv);
844	ta->flags = flags;	1241	TRANSFER_CHECK (*ta);
845	}	1242	}
846		1243
847	static void	1244	static void
848	api_transfer (SV prev, SV next, int flags)	1245	api_transfer (SV prev_sv, SV next_sv)
849	{	1246	{
850	dTHX;	1247	dTHX;
851	struct transfer_args ta;	1248	struct transfer_args ta;
852		1249
853	prepare_transfer (&ta, prev, next, flags);	1250	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
854	TRANSFER (ta);	1251	TRANSFER (ta);
855	}	1252	}
856		1253
857	/ Coro ******************************************************************/	1254	/ Coro ******************************************************************/
858		1255
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	1256	static void
872	coro_enq (SV *coro_sv)	1257	coro_enq (pTHX_ SV *coro_sv)
873	{	1258	{
874	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1259	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875	coro_nready++;
876	}	1260	}
877		1261
878	static SV *	1262	static SV *
879	coro_deq (int min_prio)	1263	coro_deq (pTHX_ int min_prio)
880	{	1264	{
881	int prio = PRIO_MAX - PRIO_MIN;	1265	int prio = PRIO_MAX - PRIO_MIN;
882		1266
883	min_prio -= PRIO_MIN;	1267	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1268	if (min_prio < 0)
885	min_prio = 0;	1269	min_prio = 0;
886		1270
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1271	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (AvFILLp (coro_ready [prio]) >= 0)	1272	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready [prio]);	1273	return av_shift (coro_ready [prio]);
892	}
893		1274
894	return 0;	1275	return 0;
895	}	1276	}
896		1277
897	static int	1278	static int
898	api_ready (SV *coro_sv)	1279	api_ready (SV *coro_sv)
899	{	1280	{
		1281	dTHX;
900	struct coro *coro;	1282	struct coro *coro;
901		1283
902	if (SvROK (coro_sv))	1284	if (SvROK (coro_sv))
903	coro_sv = SvRV (coro_sv);	1285	coro_sv = SvRV (coro_sv);
904		1286
905	coro = SvSTATE (coro_sv);	1287	coro = SvSTATE (coro_sv);
906		1288
907	if (coro->flags & CF_READY)	1289	if (coro->flags & CF_READY)
908	return 0;	1290	return 0;
909		1291
910	if (coro->flags & CF_RUNNING)
911	croak ("Coro::ready called on currently running coroutine");
912
913	coro->flags \|= CF_READY;	1292	coro->flags \|= CF_READY;
914		1293
915	LOCK;	1294	LOCK;
916	coro_enq (SvREFCNT_inc (coro_sv));	1295	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1296	++coro_nready;
917	UNLOCK;	1297	UNLOCK;
918		1298
919	return 1;	1299	return 1;
920	}	1300	}
921		1301
922	static int	1302	static int
923	api_is_ready (SV *coro_sv)	1303	api_is_ready (SV *coro_sv)
924	{	1304	{
		1305	dTHX;
925	return !!SvSTATE (coro_sv)->flags & CF_READY;	1306	return !!(SvSTATE (coro_sv)->flags & CF_READY);
926	}	1307	}
927		1308
928	static void	1309	static void
929	prepare_schedule (struct transfer_args *ta)	1310	prepare_schedule (pTHX_ struct transfer_args *ta)
930	{	1311	{
931	SV current, prev, *next;	1312	SV prev_sv, next_sv;
932
933	current = GvSV (coro_current);
934		1313
935	for (;;)	1314	for (;;)
936	{	1315	{
937	LOCK;	1316	LOCK;
938	next = coro_deq (PRIO_MIN);	1317	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1318
		1319	/* nothing to schedule: call the idle handler */
		1320	if (expect_false (!next_sv))
		1321	{
		1322	dSP;
		1323	UNLOCK;
		1324
		1325	ENTER;
		1326	SAVETMPS;
		1327
		1328	PUSHMARK (SP);
		1329	PUTBACK;
		1330	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1331
		1332	FREETMPS;
		1333	LEAVE;
		1334	continue;
		1335	}
		1336
		1337	ta->next = SvSTATE (next_sv);
		1338
		1339	/* cannot transfer to destroyed coros, skip and look for next */
		1340	if (expect_false (ta->next->flags & CF_DESTROYED))
		1341	{
		1342	UNLOCK;
		1343	SvREFCNT_dec (next_sv);
		1344	/* coro_nready is already taken care of by destroy */
		1345	continue;
		1346	}
		1347
		1348	--coro_nready;
939	UNLOCK;	1349	UNLOCK;
940
941	if (next)
942	break;	1350	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	}	1351	}
957	}
958
959	prev = SvRV (current);
960	SvRV (current) = next;
961		1352
962	/* free this only after the transfer */	1353	/* free this only after the transfer */
		1354	prev_sv = SvRV (coro_current);
		1355	ta->prev = SvSTATE (prev_sv);
		1356	TRANSFER_CHECK (*ta);
		1357	assert (ta->next->flags & CF_READY);
		1358	ta->next->flags &= ~CF_READY;
		1359	SvRV_set (coro_current, next_sv);
		1360
963	LOCK;	1361	LOCK;
964	free_coro_mortal ();	1362	free_coro_mortal (aTHX);
		1363	coro_mortal = prev_sv;
965	UNLOCK;	1364	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	}	1365	}
974		1366
975	static void	1367	static void
976	prepare_cede (struct transfer_args *ta)	1368	prepare_cede (pTHX_ struct transfer_args *ta)
977	{	1369	{
978	api_ready (GvSV (coro_current));	1370	api_ready (coro_current);
979
980	prepare_schedule (ta);	1371	prepare_schedule (aTHX_ ta);
		1372	}
		1373
		1374	static int
		1375	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1376	{
		1377	if (coro_nready)
		1378	{
		1379	SV *prev = SvRV (coro_current);
		1380	prepare_schedule (aTHX_ ta);
		1381	api_ready (prev);
		1382	return 1;
		1383	}
		1384	else
		1385	return 0;
981	}	1386	}
982		1387
983	static void	1388	static void
984	api_schedule (void)	1389	api_schedule (void)
985	{	1390	{
986	dTHX;	1391	dTHX;
987	struct transfer_args ta;	1392	struct transfer_args ta;
988		1393
989	prepare_schedule (&ta);	1394	prepare_schedule (aTHX_ &ta);
990	TRANSFER (ta);	1395	TRANSFER (ta);
991	}	1396	}
992		1397
993	static void	1398	static int
994	api_cede (void)	1399	api_cede (void)
995	{	1400	{
996	dTHX;	1401	dTHX;
997	struct transfer_args ta;	1402	struct transfer_args ta;
998		1403
999	prepare_cede (&ta);	1404	prepare_cede (aTHX_ &ta);
		1405
		1406	if (expect_true (ta.prev != ta.next))
		1407	{
1000	TRANSFER (ta);	1408	TRANSFER (ta);
		1409	return 1;
		1410	}
		1411	else
		1412	return 0;
1001	}	1413	}
1002		1414
		1415	static int
		1416	api_cede_notself (void)
		1417	{
		1418	dTHX;
		1419	struct transfer_args ta;
		1420
		1421	if (prepare_cede_notself (aTHX_ &ta))
		1422	{
		1423	TRANSFER (ta);
		1424	return 1;
		1425	}
		1426	else
		1427	return 0;
		1428	}
		1429
		1430	static void
		1431	api_trace (SV *coro_sv, int flags)
		1432	{
		1433	dTHX;
		1434	struct coro *coro = SvSTATE (coro_sv);
		1435
		1436	if (flags & CC_TRACE)
		1437	{
		1438	if (!coro->cctx)
		1439	coro->cctx = cctx_new ();
		1440	else if (!(coro->cctx->flags & CC_TRACE))
		1441	croak ("cannot enable tracing on coroutine with custom stack");
		1442
		1443	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1444	}
		1445	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1446	{
		1447	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1448
		1449	if (coro->flags & CF_RUNNING)
		1450	PL_runops = RUNOPS_DEFAULT;
		1451	else
		1452	coro->slot->runops = RUNOPS_DEFAULT;
		1453	}
		1454	}
		1455
1003	MODULE = Coro::State PACKAGE = Coro::State	1456	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1004		1457
1005	PROTOTYPES: DISABLE	1458	PROTOTYPES: DISABLE
1006		1459
1007	BOOT:	1460	BOOT:
1008	{	1461	{
1009	#ifdef USE_ITHREADS	1462	#ifdef USE_ITHREADS
1010	MUTEX_INIT (&coro_mutex);	1463	MUTEX_INIT (&coro_mutex);
1011	#endif	1464	#endif
1012	BOOT_PAGESIZE;	1465	BOOT_PAGESIZE;
1013		1466
		1467	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1468	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1469
1014	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1470	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015		1471
1016	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1472	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1017	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1473	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1018	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1474	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1475	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1019		1476
1020	main_mainstack = PL_mainstack;	1477	main_mainstack = PL_mainstack;
		1478	main_top_env = PL_top_env;
		1479
		1480	while (main_top_env->je_prev)
		1481	main_top_env = main_top_env->je_prev;
1021		1482
1022	coroapi.ver = CORO_API_VERSION;	1483	coroapi.ver = CORO_API_VERSION;
1023	coroapi.transfer = api_transfer;	1484	coroapi.transfer = api_transfer;
1024		1485
1025	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1486	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1032	struct coro *coro;	1493	struct coro *coro;
1033	HV *hv;	1494	HV *hv;
1034	int i;	1495	int i;
1035		1496
1036	Newz (0, coro, 1, struct coro);	1497	Newz (0, coro, 1, struct coro);
1037	coro->args = newAV ();	1498	coro->args = newAV ();
		1499	coro->flags = CF_NEW;
1038		1500
		1501	if (coro_first) coro_first->prev = coro;
		1502	coro->next = coro_first;
		1503	coro_first = coro;
		1504
1039	hv = newHV ();	1505	coro->hv = hv = newHV ();
1040	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1506	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));	1507	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042		1508
		1509	av_extend (coro->args, items - 1);
1043	for (i = 1; i < items; i++)	1510	for (i = 1; i < items; i++)
1044	av_push (coro->args, newSVsv (ST (i)));	1511	av_push (coro->args, newSVsv (ST (i)));
1045	}	1512	}
1046	OUTPUT:	1513	OUTPUT:
1047	RETVAL	1514	RETVAL
1048		1515
		1516	# these not obviously related functions are all rolled into the same xs
		1517	# function to increase chances that they all will call transfer with the same
		1518	# stack offset
1049	void	1519	void
1050	_set_stacklevel (...)	1520	_set_stacklevel (...)
1051	ALIAS:	1521	ALIAS:
1052	Coro::State::transfer = 1	1522	Coro::State::transfer = 1
1053	Coro::schedule = 2	1523	Coro::schedule = 2
1054	Coro::cede = 3	1524	Coro::cede = 3
1055	Coro::Cont::yield = 4	1525	Coro::cede_notself = 4
1056	CODE:	1526	CODE:
1057	{	1527	{
1058	struct transfer_args ta;	1528	struct transfer_args ta;
1059		1529
1060	switch (ix)	1530	switch (ix)
1061	{	1531	{
1062	case 0:	1532	case 0:
1063	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1533	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1064	ta.next = 0;	1534	ta.next = 0;
1065	ta.flags = TRANSFER_SET_STACKLEVEL;
1066	break;	1535	break;
1067		1536
1068	case 1:	1537	case 1:
1069	if (items != 3)	1538	if (items != 2)
1070	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1539	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1071		1540
1072	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1541	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1073	break;	1542	break;
1074		1543
1075	case 2:	1544	case 2:
1076	prepare_schedule (&ta);	1545	prepare_schedule (aTHX_ &ta);
1077	break;	1546	break;
1078		1547
1079	case 3:	1548	case 3:
1080	prepare_cede (&ta);	1549	prepare_cede (aTHX_ &ta);
1081	break;	1550	break;
1082		1551
1083	case 4:	1552	case 4:
1084	{	1553	if (!prepare_cede_notself (aTHX_ &ta))
1085	SV *yieldstack;	1554	XSRETURN_EMPTY;
1086	SV *sv;
1087	AV *defav = GvAV (PL_defgv);
1088		1555
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;	1556	break;
1108
1109	}	1557	}
1110		1558
		1559	BARRIER;
1111	TRANSFER (ta);	1560	TRANSFER (ta);
1112	}
1113		1561
1114	void	1562	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1115	_clone_state_from (SV dst, SV src)	1563	XSRETURN_YES;
		1564	}
		1565
		1566	bool
		1567	_destroy (SV *coro_sv)
1116	CODE:	1568	CODE:
1117	{	1569	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1118	struct coro *coro_src = SvSTATE (src);	1570	OUTPUT:
1119		1571	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		1572
1126	void	1573	void
1127	_exit (code)	1574	_exit (code)
1128	int code	1575	int code
1129	PROTOTYPE: $	1576	PROTOTYPE: $
1130	CODE:	1577	CODE:
1131	_exit (code);	1578	_exit (code);
1132		1579
1133	int	1580	int
		1581	cctx_stacksize (int new_stacksize = 0)
		1582	CODE:
		1583	RETVAL = coro_stacksize;
		1584	if (new_stacksize)
		1585	coro_stacksize = new_stacksize;
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
1134	cctx_count ()	1590	cctx_count ()
1135	CODE:	1591	CODE:
1136	RETVAL = cctx_count;	1592	RETVAL = cctx_count;
1137	OUTPUT:	1593	OUTPUT:
1138	RETVAL	1594	RETVAL
…		…
1142	CODE:	1598	CODE:
1143	RETVAL = cctx_idle;	1599	RETVAL = cctx_idle;
1144	OUTPUT:	1600	OUTPUT:
1145	RETVAL	1601	RETVAL
1146		1602
		1603	void
		1604	list ()
		1605	PPCODE:
		1606	{
		1607	struct coro *coro;
		1608	for (coro = coro_first; coro; coro = coro->next)
		1609	if (coro->hv)
		1610	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1611	}
		1612
		1613	void
		1614	call (Coro::State coro, SV *coderef)
		1615	ALIAS:
		1616	eval = 1
		1617	CODE:
		1618	{
		1619	if (coro->mainstack)
		1620	{
		1621	struct coro temp;
		1622
		1623	if (!(coro->flags & CF_RUNNING))
		1624	{
		1625	save_perl (aTHX_ &temp);
		1626	load_perl (aTHX_ coro);
		1627	}
		1628
		1629	{
		1630	dSP;
		1631	ENTER;
		1632	SAVETMPS;
		1633	PUSHMARK (SP);
		1634	PUTBACK;
		1635
		1636	if (ix)
		1637	eval_sv (coderef, 0);
		1638	else
		1639	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1640
		1641	SPAGAIN;
		1642	FREETMPS;
		1643	LEAVE;
		1644	PUTBACK;
		1645	}
		1646
		1647	if (!(coro->flags & CF_RUNNING))
		1648	{
		1649	save_perl (aTHX_ coro);
		1650	load_perl (aTHX_ &temp);
		1651	}
		1652	}
		1653	}
		1654
		1655	SV *
		1656	is_ready (Coro::State coro)
		1657	PROTOTYPE: $
		1658	ALIAS:
		1659	is_ready = CF_READY
		1660	is_running = CF_RUNNING
		1661	is_new = CF_NEW
		1662	is_destroyed = CF_DESTROYED
		1663	CODE:
		1664	RETVAL = boolSV (coro->flags & ix);
		1665	OUTPUT:
		1666	RETVAL
		1667
		1668	void
		1669	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1670
		1671	SV *
		1672	has_stack (Coro::State coro)
		1673	PROTOTYPE: $
		1674	CODE:
		1675	RETVAL = boolSV (!!coro->cctx);
		1676	OUTPUT:
		1677	RETVAL
		1678
		1679	int
		1680	is_traced (Coro::State coro)
		1681	PROTOTYPE: $
		1682	CODE:
		1683	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	IV
		1688	rss (Coro::State coro)
		1689	PROTOTYPE: $
		1690	ALIAS:
		1691	usecount = 1
		1692	CODE:
		1693	switch (ix)
		1694	{
		1695	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1696	case 1: RETVAL = coro->usecount; break;
		1697	}
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701
1147	MODULE = Coro::State PACKAGE = Coro	1702	MODULE = Coro::State PACKAGE = Coro
1148		1703
1149	BOOT:	1704	BOOT:
1150	{	1705	{
1151	int i;	1706	int i;
1152		1707
		1708	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1709	get_sv ("Coro::POOL_RSS" , TRUE); /* silence stupid 5.10 warning */
		1710	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1711	get_sv ("Coro::POOL_SIZE" , TRUE); /* silence stupid 5.10 warning */
		1712	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1713	get_av ("Coro::async_pool", TRUE); /* silence stupid 5.10 warning */
		1714
		1715	coro_current = get_sv ("Coro::current", FALSE);
		1716	SvREADONLY_on (coro_current);
		1717
1153	coro_stash = gv_stashpv ("Coro", TRUE);	1718	coro_stash = gv_stashpv ("Coro", TRUE);
1154		1719
1155	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1720	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1156	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1721	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1157	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1722	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1723	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1724	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1725	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161		1726
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--; )	1727	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166	coro_ready[i] = newAV ();	1728	coro_ready[i] = newAV ();
1167		1729
1168	{	1730	{
1169	SV *sv = perl_get_sv("Coro::API", 1);	1731	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1732	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1170		1733
1171	coroapi.schedule = api_schedule;	1734	coroapi.schedule = api_schedule;
1172	coroapi.cede = api_cede;	1735	coroapi.cede = api_cede;
		1736	coroapi.cede_notself = api_cede_notself;
1173	coroapi.ready = api_ready;	1737	coroapi.ready = api_ready;
1174	coroapi.is_ready = api_is_ready;	1738	coroapi.is_ready = api_is_ready;
1175	coroapi.nready = &coro_nready;	1739	coroapi.nready = &coro_nready;
1176	coroapi.current = coro_current;	1740	coroapi.current = coro_current;
1177		1741
1178	GCoroAPI = &coroapi;	1742	GCoroAPI = &coroapi;
1179	sv_setiv (sv, (IV)&coroapi);	1743	sv_setiv (sv, (IV)&coroapi);
1180	SvREADONLY_on (sv);	1744	SvREADONLY_on (sv);
1181	}	1745	}
1182	}	1746	}
		1747
		1748	void
		1749	_set_current (SV *current)
		1750	PROTOTYPE: $
		1751	CODE:
		1752	SvREFCNT_dec (SvRV (coro_current));
		1753	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1183		1754
1184	int	1755	int
1185	prio (Coro::State coro, int newprio = 0)	1756	prio (Coro::State coro, int newprio = 0)
1186	ALIAS:	1757	ALIAS:
1187	nice = 1	1758	nice = 1
…		…
1190	RETVAL = coro->prio;	1761	RETVAL = coro->prio;
1191		1762
1192	if (items > 1)	1763	if (items > 1)
1193	{	1764	{
1194	if (ix)	1765	if (ix)
1195	newprio += coro->prio;	1766	newprio = coro->prio - newprio;
1196		1767
1197	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1768	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1769	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199		1770
1200	coro->prio = newprio;	1771	coro->prio = newprio;
1201	}	1772	}
1202	}	1773	}
		1774	OUTPUT:
		1775	RETVAL
1203		1776
1204	SV *	1777	SV *
1205	ready (SV *self)	1778	ready (SV *self)
1206	PROTOTYPE: $	1779	PROTOTYPE: $
1207	CODE:	1780	CODE:
1208	RETVAL = boolSV (api_ready (self));	1781	RETVAL = boolSV (api_ready (self));
1209	OUTPUT:	1782	OUTPUT:
1210	RETVAL	1783	RETVAL
1211		1784
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	1785	int
1221	nready (...)	1786	nready (...)
1222	PROTOTYPE:	1787	PROTOTYPE:
1223	CODE:	1788	CODE:
1224	RETVAL = coro_nready;	1789	RETVAL = coro_nready;
1225	OUTPUT:	1790	OUTPUT:
1226	RETVAL	1791	RETVAL
1227		1792
		1793	void
		1794	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1795	PROTOTYPE: $;$
		1796	CODE:
		1797	SvREFCNT_dec (self->throw);
		1798	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1799
		1800	# for async_pool speedup
		1801	void
		1802	_pool_1 (SV *cb)
		1803	CODE:
		1804	{
		1805	struct coro *coro = SvSTATE (coro_current);
		1806	HV hv = (HV )SvRV (coro_current);
		1807	AV *defav = GvAV (PL_defgv);
		1808	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1809	AV *invoke_av;
		1810	int i, len;
		1811
		1812	if (!invoke)
		1813	croak ("\3async_pool terminate\2\n");
		1814
		1815	SvREFCNT_dec (coro->saved_deffh);
		1816	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1817
		1818	hv_store (hv, "desc", sizeof ("desc") - 1,
		1819	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1820
		1821	invoke_av = (AV *)SvRV (invoke);
		1822	len = av_len (invoke_av);
		1823
		1824	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1825
		1826	if (len > 0)
		1827	{
		1828	av_fill (defav, len - 1);
		1829	for (i = 0; i < len; ++i)
		1830	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1831	}
		1832
		1833	SvREFCNT_dec (invoke);
		1834	}
		1835
		1836	void
		1837	_pool_2 (SV *cb)
		1838	CODE:
		1839	{
		1840	struct coro *coro = SvSTATE (coro_current);
		1841
		1842	sv_setsv (cb, &PL_sv_undef);
		1843
		1844	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1845	coro->saved_deffh = 0;
		1846
		1847	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1848	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1849	croak ("\3async_pool terminate\2\n");
		1850
		1851	av_clear (GvAV (PL_defgv));
		1852	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1853	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1854
		1855	coro->prio = 0;
		1856
		1857	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1858	api_trace (coro_current, 0);
		1859
		1860	av_push (av_async_pool, newSVsv (coro_current));
		1861	}
		1862
		1863
1228	MODULE = Coro::State PACKAGE = Coro::AIO	1864	MODULE = Coro::State PACKAGE = Coro::AIO
1229		1865
1230	SV *	1866	SV *
1231	_get_state ()	1867	_get_state ()
1232	CODE:	1868	CODE:
1233	{	1869	{
1234	struct {	1870	struct io_state *data;
1235	int errorno;
1236	int laststype;
1237	int laststatval;
1238	Stat_t statcache;
1239	} data;
1240		1871
		1872	RETVAL = newSV (sizeof (struct io_state));
		1873	data = (struct io_state *)SvPVX (RETVAL);
		1874	SvCUR_set (RETVAL, sizeof (struct io_state));
		1875	SvPOK_only (RETVAL);
		1876
1241	data.errorno = errno;	1877	data->errorno = errno;
1242	data.laststype = PL_laststype;	1878	data->laststype = PL_laststype;
1243	data.laststatval = PL_laststatval;	1879	data->laststatval = PL_laststatval;
1244	data.statcache = PL_statcache;	1880	data->statcache = PL_statcache;
1245
1246	RETVAL = newSVpvn ((char *)&data, sizeof data);
1247	}	1881	}
1248	OUTPUT:	1882	OUTPUT:
1249	RETVAL	1883	RETVAL
1250		1884
1251	void	1885	void
1252	_set_state (char *data_)	1886	_set_state (char *data_)
1253	PROTOTYPE: $	1887	PROTOTYPE: $
1254	CODE:	1888	CODE:
1255	{	1889	{
1256	struct {	1890	struct io_state data = (void )data_;
1257	int errorno;
1258	int laststype;
1259	int laststatval;
1260	Stat_t statcache;
1261	} data = (void )data_;
1262		1891
1263	errno = data->errorno;	1892	errno = data->errorno;
1264	PL_laststype = data->laststype;	1893	PL_laststype = data->laststype;
1265	PL_laststatval = data->laststatval;	1894	PL_laststatval = data->laststatval;
1266	PL_statcache = data->statcache;	1895	PL_statcache = data->statcache;
1267	}	1896	}
		1897

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Comparing Coro/Coro/State.xs (file contents): Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs. Revision 1.198 by root, Sun Oct 7 03:58:37 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.198 by root, Sun Oct 7 03:58:37 2007 UTC