[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC vs.
Revision 1.199 by root, Sun Oct 7 13:53:37 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	static SV *sv_diehook;
		154	static SV *sv_warnhook;
		155
		156	/* async_pool helper stuff */
		157	static SV *sv_pool_rss;
		158	static SV *sv_pool_size;
		159	static AV *av_async_pool;
		160
108	static struct coro_cctx *cctx_first;	161	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	162	static int cctx_count, cctx_idle;
		163
		164	enum {
		165	CC_MAPPED = 0x01,
		166	CC_NOREUSE = 0x02, /* throw this away after tracing */
		167	CC_TRACE = 0x04,
		168	CC_TRACE_SUB = 0x08, /* trace sub calls */
		169	CC_TRACE_LINE = 0x10, /* trace each statement */
		170	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		171	};
110		172
111	/* this is a structure representing a c-level coroutine */	173	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	174	typedef struct coro_cctx {
113	struct coro_cctx *next;	175	struct coro_cctx *next;
114		176
115	/* the stack */	177	/* the stack */
116	void *sptr;	178	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	179	size_t ssize;
118		180
119	/* cpu state */	181	/* cpu state */
120	void idle_sp; / sp of top-level transfer/schedule/cede call */	182	void idle_sp; / sp of top-level transfer/schedule/cede call */
		183	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	184	JMPENV *top_env;
122	coro_context cctx;	185	coro_context cctx;
123		186
124	#if USE_VALGRIND	187	#if CORO_USE_VALGRIND
125	int valgrind_id;	188	int valgrind_id;
126	#endif	189	#endif
		190	unsigned char flags;
127	} coro_cctx;	191	} coro_cctx;
		192
		193	enum {
		194	CF_RUNNING = 0x0001, /* coroutine is running */
		195	CF_READY = 0x0002, /* coroutine is ready */
		196	CF_NEW = 0x0004, /* has never been switched to */
		197	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		198	};
		199
		200	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		201	typedef struct {
		202	SV *defsv;
		203	AV *defav;
		204	SV *errsv;
		205	SV *irsgv;
		206	#define VAR(name,type) type name;
		207	# include "state.h"
		208	#undef VAR
		209	} perl_slots;
		210
		211	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
128		212
129	/* this is a structure representing a perl-level coroutine */	213	/* this is a structure representing a perl-level coroutine */
130	struct coro {	214	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	215	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	216	coro_cctx *cctx;
133		217
		218	/* process data */
		219	AV *mainstack;
		220	perl_slots slot; / basically the saved sp */
		221
134	/* data associated with this coroutine (initial args) */	222	/* data associated with this coroutine (initial args) */
135	AV *args;	223	AV *args;
136	int refcnt;	224	int refcnt;
		225	int flags; /* CF_ flags */
137		226
138	/* optionally saved, might be zero */	227	/* statistics */
139	AV *defav;	228	int usecount; /* number of transfers to this coro */
140	SV *defsv;
141	SV *errsv;
142
143	#define VAR(name,type) type name;
144	# include "state.h"
145	#undef VAR
146		229
147	/* coro process data */	230	/* coro process data */
148	int prio;	231	int prio;
		232	SV *throw;
		233
		234	/* async_pool */
		235	SV *saved_deffh;
		236
		237	/* linked list */
		238	struct coro next, prev;
		239	HV hv; / the perl hash associated with this coro, if any */
149	};	240	};
150		241
151	typedef struct coro *Coro__State;	242	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	243	typedef struct coro *Coro__State_or_hashref;
153		244
		245	/ Coro ******************************************************************/
		246
		247	#define PRIO_MAX 3
		248	#define PRIO_HIGH 1
		249	#define PRIO_NORMAL 0
		250	#define PRIO_LOW -1
		251	#define PRIO_IDLE -3
		252	#define PRIO_MIN -4
		253
		254	/* for Coro.pm */
		255	static SV *coro_current;
		256	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		257	static int coro_nready;
		258	static struct coro *coro_first;
		259
		260	/ lowlevel stuff ********************************************************/
		261
		262	static SV *
		263	coro_get_sv (const char *name, int create)
		264	{
		265	#if PERL_VERSION_ATLEAST (5,9,0)
		266	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		267	get_sv (name, create);
		268	#endif
		269	return get_sv (name, create);
		270	}
		271
		272	static SV *
		273	coro_get_av (const char *name, int create)
		274	{
		275	#if PERL_VERSION_ATLEAST (5,9,0)
		276	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		277	get_av (name, create);
		278	#endif
		279	return get_av (name, create);
		280	}
		281
154	static AV *	282	static AV *
155	coro_clone_padlist (CV *cv)	283	coro_clone_padlist (pTHX_ CV *cv)
156	{	284	{
157	AV *padlist = CvPADLIST (cv);	285	AV *padlist = CvPADLIST (cv);
158	AV newpadlist, newpad;	286	AV newpadlist, newpad;
159		287
160	newpadlist = newAV ();	288	newpadlist = newAV ();
…		…
172		300
173	return newpadlist;	301	return newpadlist;
174	}	302	}
175		303
176	static void	304	static void
177	free_padlist (AV *padlist)	305	free_padlist (pTHX_ AV *padlist)
178	{	306	{
179	/* may be during global destruction */	307	/* may be during global destruction */
180	if (SvREFCNT (padlist))	308	if (SvREFCNT (padlist))
181	{	309	{
182	I32 i = AvFILLp (padlist);	310	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	331	AV *padlist;
204	AV av = (AV )mg->mg_obj;	332	AV av = (AV )mg->mg_obj;
205		333
206	/* casting is fun. */	334	/* casting is fun. */
207	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	335	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
208	free_padlist (padlist);	336	free_padlist (aTHX_ padlist);
209		337
210	SvREFCNT_dec (av);	338	SvREFCNT_dec (av);
211		339
212	return 0;	340	return 0;
213	}	341	}
…		…
221	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	349	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
222	? SvMAGIC (cv) \	350	? SvMAGIC (cv) \
223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	351	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
224	: 0	352	: 0
225		353
		354	static struct coro *
		355	SvSTATE_ (pTHX_ SV *coro)
		356	{
		357	HV *stash;
		358	MAGIC *mg;
		359
		360	if (SvROK (coro))
		361	coro = SvRV (coro);
		362
		363	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		364	croak ("Coro::State object required");
		365
		366	stash = SvSTASH (coro);
		367	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		368	{
		369	/* very slow, but rare, check */
		370	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		371	croak ("Coro::State object required");
		372	}
		373
		374	mg = CORO_MAGIC (coro);
		375	return (struct coro *)mg->mg_ptr;
		376	}
		377
		378	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		379
226	/* the next two functions merely cache the padlists */	380	/* the next two functions merely cache the padlists */
227	static void	381	static void
228	get_padlist (CV *cv)	382	get_padlist (pTHX_ CV *cv)
229	{	383	{
230	MAGIC *mg = CORO_MAGIC (cv);	384	MAGIC *mg = CORO_MAGIC (cv);
231	AV *av;	385	AV *av;
232		386
233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	387	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	388	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	389	else
236	{	390	{
237	#if 0	391	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this is probably cleaner, but also slower? */	392	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (cv);	393	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	394	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	395	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	396	SvREFCNT_dec (cp);
243	#else	397	#else
244	CvPADLIST (cv) = coro_clone_padlist (cv);	398	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
245	#endif	399	#endif
246	}	400	}
247	}	401	}
248		402
249	static void	403	static void
250	put_padlist (CV *cv)	404	put_padlist (pTHX_ CV *cv)
251	{	405	{
252	MAGIC *mg = CORO_MAGIC (cv);	406	MAGIC *mg = CORO_MAGIC (cv);
253	AV *av;	407	AV *av;
254		408
255	if (!mg)	409	if (expect_false (!mg))
256	{	410	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	411	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	412	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	413	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	414	mg->mg_obj = (SV *)newAV ();
261	}	415	}
262		416
263	av = (AV *)mg->mg_obj;	417	av = (AV *)mg->mg_obj;
264		418
265	if (AvFILLp (av) >= AvMAX (av))	419	if (expect_false (AvFILLp (av) >= AvMAX (av)))
266	av_extend (av, AvMAX (av) + 1);	420	av_extend (av, AvMAX (av) + 1);
267		421
268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	422	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	423	}
270		424
271	#define SB do {	425	/ load & save, init *****************************************************/
272	#define SE } while (0)
273		426
274	#define LOAD(state) load_state((state));
275	#define SAVE(state,flags) save_state((state),(flags));
276
277	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
278
279	static void	427	static void
280	load_state(Coro__State c)	428	load_perl (pTHX_ Coro__State c)
281	{	429	{
		430	perl_slots *slot = c->slot;
		431	c->slot = 0;
		432
		433	PL_mainstack = c->mainstack;
		434
		435	GvSV (PL_defgv) = slot->defsv;
		436	GvAV (PL_defgv) = slot->defav;
		437	GvSV (PL_errgv) = slot->errsv;
		438	GvSV (irsgv) = slot->irsgv;
		439
282	#define VAR(name,type) PL_ ## name = c->name;	440	#define VAR(name,type) PL_ ## name = slot->name;
283	# include "state.h"	441	# include "state.h"
284	#undef VAR	442	#undef VAR
285
286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
289		443
290	{	444	{
291	dSP;	445	dSP;
		446
292	CV *cv;	447	CV *cv;
293		448
294	/* now do the ugly restore mess */	449	/* now do the ugly restore mess */
295	while ((cv = (CV *)POPs))	450	while (expect_true (cv = (CV *)POPs))
296	{	451	{
297	put_padlist (cv); /* mark this padlist as available */	452	put_padlist (aTHX_ cv); /* mark this padlist as available */
298	CvDEPTH (cv) = PTR2IV (POPs);	453	CvDEPTH (cv) = PTR2IV (POPs);
299	CvPADLIST (cv) = (AV *)POPs;	454	CvPADLIST (cv) = (AV *)POPs;
300	}	455	}
301		456
302	PUTBACK;	457	PUTBACK;
303	}	458	}
304	}	459	}
305		460
306	static void	461	static void
307	save_state(Coro__State c, int flags)	462	save_perl (pTHX_ Coro__State c)
308	{	463	{
309	{	464	{
310	dSP;	465	dSP;
311	I32 cxix = cxstack_ix;	466	I32 cxix = cxstack_ix;
312	PERL_CONTEXT *ccstk = cxstack;	467	PERL_CONTEXT *ccstk = cxstack;
…		…
315	/*	470	/*
316	* the worst thing you can imagine happens first - we have to save	471	* the worst thing you can imagine happens first - we have to save
317	* (and reinitialize) all cv's in the whole callchain :(	472	* (and reinitialize) all cv's in the whole callchain :(
318	*/	473	*/
319		474
320	PUSHs (Nullsv);	475	XPUSHs (Nullsv);
321	/* this loop was inspired by pp_caller */	476	/* this loop was inspired by pp_caller */
322	for (;;)	477	for (;;)
323	{	478	{
324	while (cxix >= 0)	479	while (expect_true (cxix >= 0))
325	{	480	{
326	PERL_CONTEXT *cx = &ccstk[cxix--];	481	PERL_CONTEXT *cx = &ccstk[cxix--];
327		482
328	if (CxTYPE(cx) == CXt_SUB)	483	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
329	{	484	{
330	CV *cv = cx->blk_sub.cv;	485	CV *cv = cx->blk_sub.cv;
331		486
332	if (CvDEPTH (cv))	487	if (expect_true (CvDEPTH (cv)))
333	{	488	{
334	EXTEND (SP, 3);	489	EXTEND (SP, 3);
335
336	PUSHs ((SV *)CvPADLIST(cv));	490	PUSHs ((SV *)CvPADLIST (cv));
337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	491	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
338	PUSHs ((SV *)cv);	492	PUSHs ((SV *)cv);
339		493
340	CvDEPTH (cv) = 0;	494	CvDEPTH (cv) = 0;
341	get_padlist (cv);	495	get_padlist (aTHX_ cv);
342	}	496	}
343	}	497	}
344	#ifdef CXt_FORMAT
345	else if (CxTYPE(cx) == CXt_FORMAT)
346	{
347	/* I never used formats, so how should I know how these are implemented? */
348	/* my bold guess is as a simple, plain sub... */
349	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
350	}
351	#endif
352	}	498	}
353		499
354	if (top_si->si_type == PERLSI_MAIN)	500	if (expect_true (top_si->si_type == PERLSI_MAIN))
355	break;	501	break;
356		502
357	top_si = top_si->si_prev;	503	top_si = top_si->si_prev;
358	ccstk = top_si->si_cxstack;	504	ccstk = top_si->si_cxstack;
359	cxix = top_si->si_cxix;	505	cxix = top_si->si_cxix;
360	}	506	}
361		507
362	PUTBACK;	508	PUTBACK;
363	}	509	}
364		510
365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	511	/* allocate some space on the context stack for our purposes */
366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	512	{
367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	513	/* we manually unroll here, as usually 2 slots is enough */
		514	int i;
		515	if (SLOT_COUNT >= 1) CXINC;
		516	if (SLOT_COUNT >= 2) CXINC;
		517	if (SLOT_COUNT >= 3) CXINC;
		518	for (i = 3; i < SLOT_COUNT; ++i)
		519	CXINC;
368		520
		521	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		522	}
		523
		524	c->mainstack = PL_mainstack;
		525
		526	{
		527	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		528
		529	slot->defav = GvAV (PL_defgv);
		530	slot->defsv = DEFSV;
		531	slot->errsv = ERRSV;
		532	slot->irsgv = GvSV (irsgv);
		533
369	#define VAR(name,type)c->name = PL_ ## name;	534	#define VAR(name,type) slot->name = PL_ ## name;
370	# include "state.h"	535	# include "state.h"
371	#undef VAR	536	#undef VAR
		537	}
372	}	538	}
373		539
374	/*	540	/*
375	* allocate various perl stacks. This is an exact copy	541	* allocate various perl stacks. This is an exact copy
376	* of perl.c:init_stacks, except that it uses less memory	542	* of perl.c:init_stacks, except that it uses less memory
377	* on the (sometimes correct) assumption that coroutines do	543	* on the (sometimes correct) assumption that coroutines do
378	* not usually need a lot of stackspace.	544	* not usually need a lot of stackspace.
379	*/	545	*/
		546	#if CORO_PREFER_PERL_FUNCTIONS
		547	# define coro_init_stacks init_stacks
		548	#else
380	static void	549	static void
381	coro_init_stacks ()	550	coro_init_stacks (pTHX)
382	{	551	{
383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	552	PL_curstackinfo = new_stackinfo(32, 8);
384	PL_curstackinfo->si_type = PERLSI_MAIN;	553	PL_curstackinfo->si_type = PERLSI_MAIN;
385	PL_curstack = PL_curstackinfo->si_stack;	554	PL_curstack = PL_curstackinfo->si_stack;
386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	555	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
387		556
388	PL_stack_base = AvARRAY(PL_curstack);	557	PL_stack_base = AvARRAY(PL_curstack);
389	PL_stack_sp = PL_stack_base;	558	PL_stack_sp = PL_stack_base;
390	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	559	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
391		560
392	New(50,PL_tmps_stack,96,SV*);	561	New(50,PL_tmps_stack,32,SV*);
393	PL_tmps_floor = -1;	562	PL_tmps_floor = -1;
394	PL_tmps_ix = -1;	563	PL_tmps_ix = -1;
395	PL_tmps_max = 96;	564	PL_tmps_max = 32;
396		565
397	New(54,PL_markstack,16,I32);	566	New(54,PL_markstack,16,I32);
398	PL_markstack_ptr = PL_markstack;	567	PL_markstack_ptr = PL_markstack;
399	PL_markstack_max = PL_markstack + 16;	568	PL_markstack_max = PL_markstack + 16;
400		569
401	#ifdef SET_MARK_OFFSET	570	#ifdef SET_MARK_OFFSET
402	SET_MARK_OFFSET;	571	SET_MARK_OFFSET;
403	#endif	572	#endif
404		573
405	New(54,PL_scopestack,16,I32);	574	New(54,PL_scopestack,8,I32);
406	PL_scopestack_ix = 0;	575	PL_scopestack_ix = 0;
407	PL_scopestack_max = 16;	576	PL_scopestack_max = 8;
408		577
409	New(54,PL_savestack,96,ANY);	578	New(54,PL_savestack,24,ANY);
410	PL_savestack_ix = 0;	579	PL_savestack_ix = 0;
411	PL_savestack_max = 96;	580	PL_savestack_max = 24;
412		581
413	#if !PERL_VERSION_ATLEAST (5,9,0)	582	#if !PERL_VERSION_ATLEAST (5,9,0)
414	New(54,PL_retstack,8,OP*);	583	New(54,PL_retstack,4,OP*);
415	PL_retstack_ix = 0;	584	PL_retstack_ix = 0;
416	PL_retstack_max = 8;	585	PL_retstack_max = 4;
417	#endif	586	#endif
418	}	587	}
		588	#endif
419		589
420	/*	590	/*
421	* destroy the stacks, the callchain etc...	591	* destroy the stacks, the callchain etc...
422	*/	592	*/
423	static void	593	static void
424	coro_destroy_stacks ()	594	coro_destroy_stacks (pTHX)
425	{	595	{
426	if (!IN_DESTRUCT)
427	{
428	/* is this ugly, I ask? */
429	LEAVE_SCOPE (0);
430
431	/* sure it is, but more important: is it correct?? :/ */
432	FREETMPS;
433
434	/POPSTACK_TO (PL_mainstack);//D//use/
435	}
436
437	while (PL_curstackinfo->si_next)	596	while (PL_curstackinfo->si_next)
438	PL_curstackinfo = PL_curstackinfo->si_next;	597	PL_curstackinfo = PL_curstackinfo->si_next;
439		598
440	while (PL_curstackinfo)	599	while (PL_curstackinfo)
441	{	600	{
442	PERL_SI *p = PL_curstackinfo->si_prev;	601	PERL_SI *p = PL_curstackinfo->si_prev;
443		602
444	{ /D//remove/
445	dSP;
446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
447	PUTBACK; /* possibly superfluous */
448	}
449
450	if (!IN_DESTRUCT)	603	if (!IN_DESTRUCT)
451	{
452	dounwind (-1);/D//remove/
453	SvREFCNT_dec (PL_curstackinfo->si_stack);	604	SvREFCNT_dec (PL_curstackinfo->si_stack);
454	}
455		605
456	Safefree (PL_curstackinfo->si_cxstack);	606	Safefree (PL_curstackinfo->si_cxstack);
457	Safefree (PL_curstackinfo);	607	Safefree (PL_curstackinfo);
458	PL_curstackinfo = p;	608	PL_curstackinfo = p;
459	}	609	}
…		…
465	#if !PERL_VERSION_ATLEAST (5,9,0)	615	#if !PERL_VERSION_ATLEAST (5,9,0)
466	Safefree (PL_retstack);	616	Safefree (PL_retstack);
467	#endif	617	#endif
468	}	618	}
469		619
470	static void	620	static size_t
471	setup_coro (struct coro *coro)	621	coro_rss (pTHX_ struct coro *coro)
		622	{
		623	size_t rss = sizeof (*coro);
		624
		625	if (coro->mainstack)
		626	{
		627	perl_slots tmp_slot;
		628	perl_slots *slot;
		629
		630	if (coro->flags & CF_RUNNING)
		631	{
		632	slot = &tmp_slot;
		633
		634	#define VAR(name,type) slot->name = PL_ ## name;
		635	# include "state.h"
		636	#undef VAR
		637	}
		638	else
		639	slot = coro->slot;
		640
		641	rss += sizeof (slot->curstackinfo);
		642	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		643	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		644	rss += slot->tmps_max * sizeof (SV *);
		645	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		646	rss += slot->scopestack_max * sizeof (I32);
		647	rss += slot->savestack_max * sizeof (ANY);
		648
		649	#if !PERL_VERSION_ATLEAST (5,9,0)
		650	rss += slot->retstack_max * sizeof (OP *);
		651	#endif
		652	}
		653
		654	return rss;
		655	}
		656
		657	/ coroutine stack handling **********************************************/
		658
		659	static void
		660	coro_setup (pTHX_ struct coro *coro)
472	{	661	{
473	/*	662	/*
474	* emulate part of the perl startup here.	663	* emulate part of the perl startup here.
475	*/	664	*/
476
477	coro_init_stacks ();	665	coro_init_stacks (aTHX);
478		666
		667	PL_runops = RUNOPS_DEFAULT;
		668	PL_curcop = &PL_compiling;
		669	PL_in_eval = EVAL_NULL;
479	PL_curcop = 0;	670	PL_comppad = 0;
480	PL_in_eval = 0;
481	PL_curpm = 0;	671	PL_curpm = 0;
		672	PL_curpad = 0;
		673	PL_localizing = 0;
		674	PL_dirty = 0;
		675	PL_restartop = 0;
		676	PL_diehook = SvREFCNT_inc (sv_diehook);
		677	PL_warnhook = SvREFCNT_inc (sv_warnhook);
		678
		679	GvSV (PL_defgv) = newSV (0);
		680	GvAV (PL_defgv) = coro->args; coro->args = 0;
		681	GvSV (PL_errgv) = newSV (0);
		682	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		683	PL_rs = newSVsv (GvSV (irsgv));
		684	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
482		685
483	{	686	{
484	dSP;	687	dSP;
485	LOGOP myop;	688	LOGOP myop;
486		689
487	/* I have no idea why this is needed, but it is */
488	PUSHMARK (SP);
489
490	SvREFCNT_dec (GvAV (PL_defgv));
491	GvAV (PL_defgv) = coro->args; coro->args = 0;
492
493	Zero (&myop, 1, LOGOP);	690	Zero (&myop, 1, LOGOP);
494	myop.op_next = Nullop;	691	myop.op_next = Nullop;
495	myop.op_flags = OPf_WANT_VOID;	692	myop.op_flags = OPf_WANT_VOID;
496		693
		694	PUSHMARK (SP);
		695	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		696	PUTBACK;
497	PL_op = (OP *)&myop;	697	PL_op = (OP *)&myop;
498
499	PUSHMARK (SP);
500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
501	PUTBACK;
502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	698	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
503	SPAGAIN;	699	SPAGAIN;
504
505	ENTER; /* necessary e.g. for dounwind */
506	}	700	}
507	}
508		701
		702	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		703	}
		704
509	static void	705	static void
		706	coro_destroy (pTHX_ struct coro *coro)
		707	{
		708	if (!IN_DESTRUCT)
		709	{
		710	/* restore all saved variables and stuff */
		711	LEAVE_SCOPE (0);
		712	assert (PL_tmps_floor == -1);
		713
		714	/* free all temporaries */
		715	FREETMPS;
		716	assert (PL_tmps_ix == -1);
		717
		718	/* unwind all extra stacks */
		719	POPSTACK_TO (PL_mainstack);
		720
		721	/* unwind main stack */
		722	dounwind (-1);
		723	}
		724
		725	SvREFCNT_dec (GvSV (PL_defgv));
		726	SvREFCNT_dec (GvAV (PL_defgv));
		727	SvREFCNT_dec (GvSV (PL_errgv));
		728	SvREFCNT_dec (PL_defoutgv);
		729	SvREFCNT_dec (PL_rs);
		730	SvREFCNT_dec (GvSV (irsgv));
		731
		732	SvREFCNT_dec (PL_diehook);
		733	SvREFCNT_dec (PL_warnhook);
		734
		735	SvREFCNT_dec (coro->saved_deffh);
		736	SvREFCNT_dec (coro->throw);
		737
		738	coro_destroy_stacks (aTHX);
		739	}
		740
		741	static void
510	free_coro_mortal ()	742	free_coro_mortal (pTHX)
511	{	743	{
512	if (coro_mortal)	744	if (expect_true (coro_mortal))
513	{	745	{
514	SvREFCNT_dec (coro_mortal);	746	SvREFCNT_dec (coro_mortal);
515	coro_mortal = 0;	747	coro_mortal = 0;
516	}	748	}
517	}	749	}
518		750
		751	static int
		752	runops_trace (pTHX)
		753	{
		754	COP *oldcop = 0;
		755	int oldcxix = -2;
		756	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		757	coro_cctx *cctx = coro->cctx;
		758
		759	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		760	{
		761	PERL_ASYNC_CHECK ();
		762
		763	if (cctx->flags & CC_TRACE_ALL)
		764	{
		765	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		766	{
		767	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		768	SV bot, top;
		769	AV av = newAV (); / return values */
		770	SV **cb;
		771	dSP;
		772
		773	GV *gv = CvGV (cx->blk_sub.cv);
		774	SV *fullname = sv_2mortal (newSV (0));
		775	if (isGV (gv))
		776	gv_efullname3 (fullname, gv, 0);
		777
		778	bot = PL_stack_base + cx->blk_oldsp + 1;
		779	top = cx->blk_gimme == G_ARRAY ? SP + 1
		780	: cx->blk_gimme == G_SCALAR ? bot + 1
		781	: bot;
		782
		783	av_extend (av, top - bot);
		784	while (bot < top)
		785	av_push (av, SvREFCNT_inc (*bot++));
		786
		787	PL_runops = RUNOPS_DEFAULT;
		788	ENTER;
		789	SAVETMPS;
		790	EXTEND (SP, 3);
		791	PUSHMARK (SP);
		792	PUSHs (&PL_sv_no);
		793	PUSHs (fullname);
		794	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		795	PUTBACK;
		796	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		797	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		798	SPAGAIN;
		799	FREETMPS;
		800	LEAVE;
		801	PL_runops = runops_trace;
		802	}
		803
		804	if (oldcop != PL_curcop)
		805	{
		806	oldcop = PL_curcop;
		807
		808	if (PL_curcop != &PL_compiling)
		809	{
		810	SV **cb;
		811
		812	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		813	{
		814	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		815
		816	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		817	{
		818	runops_proc_t old_runops = PL_runops;
		819	dSP;
		820	GV *gv = CvGV (cx->blk_sub.cv);
		821	SV *fullname = sv_2mortal (newSV (0));
		822
		823	if (isGV (gv))
		824	gv_efullname3 (fullname, gv, 0);
		825
		826	PL_runops = RUNOPS_DEFAULT;
		827	ENTER;
		828	SAVETMPS;
		829	EXTEND (SP, 3);
		830	PUSHMARK (SP);
		831	PUSHs (&PL_sv_yes);
		832	PUSHs (fullname);
		833	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		834	PUTBACK;
		835	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		836	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		837	SPAGAIN;
		838	FREETMPS;
		839	LEAVE;
		840	PL_runops = runops_trace;
		841	}
		842
		843	oldcxix = cxstack_ix;
		844	}
		845
		846	if (cctx->flags & CC_TRACE_LINE)
		847	{
		848	dSP;
		849
		850	PL_runops = RUNOPS_DEFAULT;
		851	ENTER;
		852	SAVETMPS;
		853	EXTEND (SP, 3);
		854	PL_runops = RUNOPS_DEFAULT;
		855	PUSHMARK (SP);
		856	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		857	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		858	PUTBACK;
		859	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		860	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		861	SPAGAIN;
		862	FREETMPS;
		863	LEAVE;
		864	PL_runops = runops_trace;
		865	}
		866	}
		867	}
		868	}
		869	}
		870
		871	TAINT_NOT;
		872	return 0;
		873	}
		874
		875	/* inject a fake call to Coro::State::_cctx_init into the execution */
		876	/* _cctx_init should be careful, as it could be called at almost any time */
		877	/* during execution of a perl program */
519	static void NOINLINE	878	static void NOINLINE
520	prepare_cctx (coro_cctx *cctx)	879	prepare_cctx (pTHX_ coro_cctx *cctx)
521	{	880	{
522	dSP;	881	dSP;
523	LOGOP myop;	882	LOGOP myop;
524		883
		884	PL_top_env = &PL_start_env;
		885
		886	if (cctx->flags & CC_TRACE)
		887	PL_runops = runops_trace;
		888
525	Zero (&myop, 1, LOGOP);	889	Zero (&myop, 1, LOGOP);
526	myop.op_next = PL_op;	890	myop.op_next = PL_op;
527	myop.op_flags = OPf_WANT_VOID;	891	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
528
529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530		892
531	PUSHMARK (SP);	893	PUSHMARK (SP);
		894	EXTEND (SP, 2);
		895	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	896	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533	PUTBACK;	897	PUTBACK;
		898	PL_op = (OP *)&myop;
534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	899	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535	SPAGAIN;	900	SPAGAIN;
536	}	901	}
537		902
		903	/*
		904	* this is a _very_ stripped down perl interpreter ;)
		905	*/
538	static void	906	static void
539	coro_run (void *arg)	907	coro_run (void *arg)
540	{	908	{
		909	dTHX;
		910
541	/* coro_run is the alternative epilogue of transfer() */	911	/* coro_run is the alternative tail of transfer(), so unlock here. */
542	UNLOCK;	912	UNLOCK;
543		913
		914	/* we now skip the entersub that lead to transfer() */
		915	PL_op = PL_op->op_next;
		916
		917	/* inject a fake subroutine call to cctx_init */
		918	prepare_cctx (aTHX_ (coro_cctx *)arg);
		919
		920	/* somebody or something will hit me for both perl_run and PL_restartop */
		921	PL_restartop = PL_op;
		922	perl_run (PL_curinterp);
		923
544	/*	924	/*
545	* this is a _very_ stripped down perl interpreter ;)	925	* If perl-run returns we assume exit() was being called or the coro
		926	* fell off the end, which seems to be the only valid (non-bug)
		927	* reason for perl_run to return. We try to exit by jumping to the
		928	* bootstrap-time "top" top_env, as we cannot restore the "main"
		929	* coroutine as Coro has no such concept
546	*/	930	*/
547	PL_top_env = &PL_start_env;	931	PL_top_env = main_top_env;
548		932	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
549	/* inject call to cctx_init */
550	prepare_cctx ((coro_cctx *)arg);
551
552	/* somebody will hit me for both perl_run and PL_restartop */
553	perl_run (PL_curinterp);
554
555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
556	abort ();
557	}	933	}
558		934
559	static coro_cctx *	935	static coro_cctx *
560	cctx_new ()	936	cctx_new ()
561	{	937	{
562	coro_cctx *cctx;	938	coro_cctx *cctx;
		939	void *stack_start;
		940	size_t stack_size;
563		941
564	++cctx_count;	942	++cctx_count;
565		943
566	New (0, cctx, 1, coro_cctx);	944	Newz (0, cctx, 1, coro_cctx);
567		945
568	#if HAVE_MMAP	946	#if HAVE_MMAP
569		947
570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	948	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
571	/* mmap suppsedly does allocate-on-write for us */	949	/* mmap supposedly does allocate-on-write for us */
572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	950	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
573		951
574	if (cctx->sptr == (void *)-1)	952	if (cctx->sptr != (void *)-1)
575	{
576	perror ("FATAL: unable to mmap stack for coroutine");
577	_exit (EXIT_FAILURE);
578	}	953	{
579
580	# if STACKGUARD	954	# if CORO_STACKGUARD
581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	955	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
582	# endif	956	# endif
		957	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		958	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		959	cctx->flags \|= CC_MAPPED;
		960	}
		961	else
		962	#endif
		963	{
		964	cctx->ssize = coro_stacksize * (long)sizeof (long);
		965	New (0, cctx->sptr, coro_stacksize, long);
583		966
584	#else
585
586	cctx->ssize = STACKSIZE * (long)sizeof (long);
587	New (0, cctx->sptr, STACKSIZE, long);
588
589	if (!cctx->sptr)	967	if (!cctx->sptr)
590	{	968	{
591	perror ("FATAL: unable to malloc stack for coroutine");	969	perror ("FATAL: unable to allocate stack for coroutine");
592	_exit (EXIT_FAILURE);	970	_exit (EXIT_FAILURE);
593	}	971	}
594		972
595	#endif	973	stack_start = cctx->sptr;
		974	stack_size = cctx->ssize;
		975	}
596		976
597	#if USE_VALGRIND	977	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
600	cctx->ssize + (char *)cctx->sptr
601	);
602	#endif
603
604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	978	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
605		979
606	return cctx;	980	return cctx;
607	}	981	}
608		982
609	static void	983	static void
610	cctx_free (coro_cctx *cctx)	984	cctx_destroy (coro_cctx *cctx)
611	{	985	{
612	if (!cctx)	986	if (!cctx)
613	return;	987	return;
614		988
615	--cctx_count;	989	--cctx_count;
616		990
617	#if USE_VALGRIND	991	#if CORO_USE_VALGRIND
618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	992	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619	#endif	993	#endif
620		994
621	#if HAVE_MMAP	995	#if HAVE_MMAP
		996	if (cctx->flags & CC_MAPPED)
622	munmap (cctx->sptr, cctx->ssize);	997	munmap (cctx->sptr, cctx->ssize);
623	#else	998	else
		999	#endif
624	Safefree (cctx->sptr);	1000	Safefree (cctx->sptr);
625	#endif
626		1001
627	Safefree (cctx);	1002	Safefree (cctx);
628	}	1003	}
629		1004
		1005	/* wether this cctx should be destructed */
		1006	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1007
630	static coro_cctx *	1008	static coro_cctx *
631	cctx_get ()	1009	cctx_get (pTHX)
632	{	1010	{
633	coro_cctx *cctx;	1011	while (expect_true (cctx_first))
634
635	if (cctx_first)
636	{	1012	{
		1013	coro_cctx *cctx = cctx_first;
		1014	cctx_first = cctx->next;
637	--cctx_idle;	1015	--cctx_idle;
638	cctx = cctx_first;	1016
639	cctx_first = cctx->next;	1017	if (expect_true (!CCTX_EXPIRED (cctx)))
640	}	1018	return cctx;
641	else	1019
642	{	1020	cctx_destroy (cctx);
643	cctx = cctx_new ();
644	PL_op = PL_op->op_next;
645	}	1021	}
646		1022
647	return cctx;	1023	return cctx_new ();
648	}	1024	}
649		1025
650	static void	1026	static void
651	cctx_put (coro_cctx *cctx)	1027	cctx_put (coro_cctx *cctx)
652	{	1028	{
		1029	/* free another cctx if overlimit */
		1030	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1031	{
		1032	coro_cctx *first = cctx_first;
		1033	cctx_first = first->next;
		1034	--cctx_idle;
		1035
		1036	cctx_destroy (first);
		1037	}
		1038
653	++cctx_idle;	1039	++cctx_idle;
654	cctx->next = cctx_first;	1040	cctx->next = cctx_first;
655	cctx_first = cctx;	1041	cctx_first = cctx;
656	}	1042	}
657		1043
658	/* never call directly, always through the coro_state_transfer global variable */	1044	/ coroutine switching ***************************************************/
		1045
		1046	static void
		1047	transfer_check (pTHX_ struct coro prev, struct coro next)
		1048	{
		1049	if (expect_true (prev != next))
		1050	{
		1051	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1052	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1053
		1054	if (expect_false (next->flags & CF_RUNNING))
		1055	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1056
		1057	if (expect_false (next->flags & CF_DESTROYED))
		1058	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1059
		1060	if (
		1061	#if PERL_VERSION_ATLEAST (5,9,0)
		1062	expect_false (PL_parser)
		1063	#else
		1064	expect_false (PL_lex_state != LEX_NOTPARSING)
		1065	#endif
		1066	)
		1067	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1068	}
		1069	}
		1070
		1071	/* always use the TRANSFER macro */
659	static void NOINLINE	1072	static void NOINLINE
660	transfer (struct coro prev, struct coro next, int flags)	1073	transfer (pTHX_ struct coro prev, struct coro next)
661	{	1074	{
662	dSTACKLEVEL;	1075	dSTACKLEVEL;
663		1076
664	/* sometimes transfer is only called to set idle_sp */	1077	/* sometimes transfer is only called to set idle_sp */
665	if (flags == TRANSFER_SET_STACKLEVEL)	1078	if (expect_false (!next))
		1079	{
666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1080	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1081	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1082	}
667	else if (prev != next)	1083	else if (expect_true (prev != next))
668	{	1084	{
669	coro_cctx *prev__cctx;	1085	coro_cctx *prev__cctx;
670		1086
		1087	if (expect_false (prev->flags & CF_NEW))
		1088	{
		1089	/* create a new empty context */
		1090	Newz (0, prev->cctx, 1, coro_cctx);
		1091	prev->flags &= ~CF_NEW;
		1092	prev->flags \|= CF_RUNNING;
		1093	}
		1094
		1095	prev->flags &= ~CF_RUNNING;
		1096	next->flags \|= CF_RUNNING;
		1097
671	LOCK;	1098	LOCK;
672		1099
673	if (next->mainstack)	1100	if (expect_false (next->flags & CF_NEW))
674	{	1101	{
675	/* coroutine already started */	1102	/* need to start coroutine */
676	SAVE (prev, flags);	1103	next->flags &= ~CF_NEW;
677	LOAD (next);	1104	/* first get rid of the old state */
		1105	save_perl (aTHX_ prev);
		1106	/* setup coroutine call */
		1107	coro_setup (aTHX_ next);
678	}	1108	}
679	else	1109	else
680	{	1110	{
681	/* need to start coroutine */	1111	/* coroutine already started */
682	/* first get rid of the old state */	1112	save_perl (aTHX_ prev);
683	SAVE (prev, -1);	1113	load_perl (aTHX_ next);
684	/* setup coroutine call */
685	setup_coro (next);
686	/* need a stack */
687	next->cctx = 0;
688	}	1114	}
689		1115
690	if (!prev->cctx)
691	/* create a new empty context */
692	Newz (0, prev->cctx, 1, coro_cctx);
693
694	prev__cctx = prev->cctx;	1116	prev__cctx = prev->cctx;
695		1117
696	/* possibly "free" the cctx */	1118	/* possibly "free" the cctx */
697	if (prev__cctx->idle_sp == STACKLEVEL)	1119	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
698	{	1120	{
699	assert (PL_top_env == prev__cctx->top_env);//D	1121	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1122	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1123
		1124	prev->cctx = 0;
		1125
		1126	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1127	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1128	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1129	next->cctx = cctx_get (aTHX);
		1130
700	cctx_put (prev__cctx);	1131	cctx_put (prev__cctx);
701	prev->cctx = 0;
702	}	1132	}
703		1133
		1134	++next->usecount;
		1135
704	if (!next->cctx)	1136	if (expect_true (!next->cctx))
705	next->cctx = cctx_get ();	1137	next->cctx = cctx_get (aTHX);
706		1138
707	if (prev__cctx != next->cctx)	1139	if (expect_false (prev__cctx != next->cctx))
708	{	1140	{
709	prev__cctx->top_env = PL_top_env;	1141	prev__cctx->top_env = PL_top_env;
710	PL_top_env = next->cctx->top_env;	1142	PL_top_env = next->cctx->top_env;
711	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1143	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
712	}	1144	}
713		1145
714	free_coro_mortal ();	1146	free_coro_mortal (aTHX);
715
716	UNLOCK;	1147	UNLOCK;
		1148
		1149	if (expect_false (prev->throw \|\| next->throw))
		1150	{
		1151	struct coro *coro = SvSTATE (coro_current);
		1152
		1153	if (coro->throw)
		1154	{
		1155	SV *exception = coro->throw;
		1156	coro->throw = 0;
		1157	sv_setsv (ERRSV, exception);
		1158	croak (0);
		1159	}
		1160	}
717	}	1161	}
718	}	1162	}
719		1163
720	struct transfer_args	1164	struct transfer_args
721	{	1165	{
722	struct coro prev, next;	1166	struct coro prev, next;
723	int flags;
724	};	1167	};
725		1168
726	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1169	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1170	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
727		1171
		1172	/ high level stuff ******************************************************/
		1173
728	static void	1174	static int
729	coro_state_destroy (struct coro *coro)	1175	coro_state_destroy (pTHX_ struct coro *coro)
730	{	1176	{
731	if (coro->refcnt--)	1177	if (coro->flags & CF_DESTROYED)
732	return;	1178	return 0;
		1179
		1180	coro->flags \|= CF_DESTROYED;
		1181
		1182	if (coro->flags & CF_READY)
		1183	{
		1184	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1185	/* alternative: look through all ready queues and remove the coro */
		1186	LOCK;
		1187	--coro_nready;
		1188	UNLOCK;
		1189	}
		1190	else
		1191	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
733		1192
734	if (coro->mainstack && coro->mainstack != main_mainstack)	1193	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	1194	{
736	struct coro temp;	1195	struct coro temp;
737		1196
738	SAVE ((&temp), TRANSFER_SAVE_ALL);	1197	if (coro->flags & CF_RUNNING)
739	LOAD (coro);	1198	croak ("FATAL: tried to destroy currently running coroutine");
740		1199
741	coro_destroy_stacks ();	1200	save_perl (aTHX_ &temp);
		1201	load_perl (aTHX_ coro);
742		1202
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1203	coro_destroy (aTHX_ coro);
744		1204
		1205	load_perl (aTHX_ &temp);
		1206
745	coro->mainstack = 0;	1207	coro->slot = 0;
746	}	1208	}
747		1209
748	cctx_free (coro->cctx);	1210	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	1211	SvREFCNT_dec (coro->args);
750	Safefree (coro);	1212
		1213	if (coro->next) coro->next->prev = coro->prev;
		1214	if (coro->prev) coro->prev->next = coro->next;
		1215	if (coro == coro_first) coro_first = coro->next;
		1216
		1217	return 1;
751	}	1218	}
752		1219
753	static int	1220	static int
754	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1221	coro_state_free (pTHX_ SV sv, MAGIC mg)
755	{	1222	{
756	struct coro coro = (struct coro )mg->mg_ptr;	1223	struct coro coro = (struct coro )mg->mg_ptr;
757	mg->mg_ptr = 0;	1224	mg->mg_ptr = 0;
758		1225
		1226	coro->hv = 0;
		1227
		1228	if (--coro->refcnt < 0)
		1229	{
759	coro_state_destroy (coro);	1230	coro_state_destroy (aTHX_ coro);
		1231	Safefree (coro);
		1232	}
760		1233
761	return 0;	1234	return 0;
762	}	1235	}
763		1236
764	static int	1237	static int
…		…
771	return 0;	1244	return 0;
772	}	1245	}
773		1246
774	static MGVTBL coro_state_vtbl = {	1247	static MGVTBL coro_state_vtbl = {
775	0, 0, 0, 0,	1248	0, 0, 0, 0,
776	coro_state_clear,	1249	coro_state_free,
777	0,	1250	0,
778	#ifdef MGf_DUP	1251	#ifdef MGf_DUP
779	coro_state_dup,	1252	coro_state_dup,
780	#else	1253	#else
781	# define MGf_DUP 0	1254	# define MGf_DUP 0
782	#endif	1255	#endif
783	};	1256	};
784		1257
785	static struct coro *
786	SvSTATE (SV *coro)
787	{
788	HV *stash;
789	MAGIC *mg;
790
791	if (SvROK (coro))
792	coro = SvRV (coro);
793
794	stash = SvSTASH (coro);
795	if (stash != coro_stash && stash != coro_state_stash)
796	{
797	/* very slow, but rare, check */
798	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
799	croak ("Coro::State object required");
800	}
801
802	mg = SvMAGIC (coro);
803	assert (mg->mg_type == PERL_MAGIC_ext);
804	return (struct coro *)mg->mg_ptr;
805	}
806
807	static void	1258	static void
808	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1259	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
809	{	1260	{
810	ta->prev = SvSTATE (prev);	1261	ta->prev = SvSTATE (prev_sv);
811	ta->next = SvSTATE (next);	1262	ta->next = SvSTATE (next_sv);
812	ta->flags = flags;	1263	TRANSFER_CHECK (*ta);
813	}	1264	}
814		1265
815	static void	1266	static void
816	api_transfer (SV prev, SV next, int flags)	1267	api_transfer (SV prev_sv, SV next_sv)
817	{	1268	{
818	dTHX;	1269	dTHX;
819	struct transfer_args ta;	1270	struct transfer_args ta;
820		1271
821	prepare_transfer (&ta, prev, next, flags);	1272	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
822	TRANSFER (ta);	1273	TRANSFER (ta);
823	}	1274	}
824		1275
825	/ Coro ******************************************************************/	1276	/ Coro ******************************************************************/
826		1277
827	#define PRIO_MAX 3
828	#define PRIO_HIGH 1
829	#define PRIO_NORMAL 0
830	#define PRIO_LOW -1
831	#define PRIO_IDLE -3
832	#define PRIO_MIN -4
833
834	/* for Coro.pm */
835	static GV coro_current, coro_idle;
836	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
837	static int coro_nready;
838
839	static void	1278	static void
840	coro_enq (SV *sv)	1279	coro_enq (pTHX_ SV *coro_sv)
841	{	1280	{
842	int prio;
843
844	if (SvTYPE (sv) != SVt_PVHV)
845	croak ("Coro::ready tried to enqueue something that is not a coroutine");
846
847	prio = SvSTATE (sv)->prio;
848
849	av_push (coro_ready [prio - PRIO_MIN], sv);	1281	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
850	coro_nready++;
851	}	1282	}
852		1283
853	static SV *	1284	static SV *
854	coro_deq (int min_prio)	1285	coro_deq (pTHX_ int min_prio)
855	{	1286	{
856	int prio = PRIO_MAX - PRIO_MIN;	1287	int prio = PRIO_MAX - PRIO_MIN;
857		1288
858	min_prio -= PRIO_MIN;	1289	min_prio -= PRIO_MIN;
859	if (min_prio < 0)	1290	if (min_prio < 0)
860	min_prio = 0;	1291	min_prio = 0;
861		1292
862	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1293	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
863	if (AvFILLp (coro_ready [prio]) >= 0)	1294	if (AvFILLp (coro_ready [prio]) >= 0)
864	{
865	coro_nready--;
866	return av_shift (coro_ready [prio]);	1295	return av_shift (coro_ready [prio]);
867	}
868		1296
869	return 0;	1297	return 0;
870	}	1298	}
871		1299
872	static void	1300	static int
873	api_ready (SV *coro)	1301	api_ready (SV *coro_sv)
874	{	1302	{
875	dTHX;	1303	dTHX;
		1304	struct coro *coro;
876		1305
877	if (SvROK (coro))	1306	if (SvROK (coro_sv))
878	coro = SvRV (coro);	1307	coro_sv = SvRV (coro_sv);
		1308
		1309	coro = SvSTATE (coro_sv);
		1310
		1311	if (coro->flags & CF_READY)
		1312	return 0;
		1313
		1314	coro->flags \|= CF_READY;
879		1315
880	LOCK;	1316	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	1317	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1318	++coro_nready;
882	UNLOCK;	1319	UNLOCK;
883	}
884		1320
		1321	return 1;
		1322	}
		1323
885	static void	1324	static int
		1325	api_is_ready (SV *coro_sv)
		1326	{
		1327	dTHX;
		1328	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1329	}
		1330
		1331	static void
886	prepare_schedule (struct transfer_args *ta)	1332	prepare_schedule (pTHX_ struct transfer_args *ta)
887	{	1333	{
888	SV current, prev, *next;	1334	SV prev_sv, next_sv;
889
890	current = GvSV (coro_current);
891		1335
892	for (;;)	1336	for (;;)
893	{	1337	{
894	LOCK;	1338	LOCK;
895	next = coro_deq (PRIO_MIN);	1339	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1340
		1341	/* nothing to schedule: call the idle handler */
		1342	if (expect_false (!next_sv))
		1343	{
		1344	dSP;
		1345	UNLOCK;
		1346
		1347	ENTER;
		1348	SAVETMPS;
		1349
		1350	PUSHMARK (SP);
		1351	PUTBACK;
		1352	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1353
		1354	FREETMPS;
		1355	LEAVE;
		1356	continue;
		1357	}
		1358
		1359	ta->next = SvSTATE (next_sv);
		1360
		1361	/* cannot transfer to destroyed coros, skip and look for next */
		1362	if (expect_false (ta->next->flags & CF_DESTROYED))
		1363	{
		1364	UNLOCK;
		1365	SvREFCNT_dec (next_sv);
		1366	/* coro_nready is already taken care of by destroy */
		1367	continue;
		1368	}
		1369
		1370	--coro_nready;
896	UNLOCK;	1371	UNLOCK;
897
898	if (next)
899	break;	1372	break;
900
901	{
902	dSP;
903
904	ENTER;
905	SAVETMPS;
906
907	PUSHMARK (SP);
908	PUTBACK;
909	call_sv (GvSV (coro_idle), G_DISCARD);
910
911	FREETMPS;
912	LEAVE;
913	}	1373	}
914	}
915
916	prev = SvRV (current);
917	SvRV (current) = next;
918		1374
919	/* free this only after the transfer */	1375	/* free this only after the transfer */
		1376	prev_sv = SvRV (coro_current);
		1377	ta->prev = SvSTATE (prev_sv);
		1378	TRANSFER_CHECK (*ta);
		1379	assert (ta->next->flags & CF_READY);
		1380	ta->next->flags &= ~CF_READY;
		1381	SvRV_set (coro_current, next_sv);
		1382
920	LOCK;	1383	LOCK;
921	free_coro_mortal ();	1384	free_coro_mortal (aTHX);
		1385	coro_mortal = prev_sv;
922	UNLOCK;	1386	UNLOCK;
923	coro_mortal = prev;
924
925	ta->prev = SvSTATE (prev);
926	ta->next = SvSTATE (next);
927	ta->flags = TRANSFER_SAVE_ALL;
928	}	1387	}
929		1388
930	static void	1389	static void
931	prepare_cede (struct transfer_args *ta)	1390	prepare_cede (pTHX_ struct transfer_args *ta)
932	{	1391	{
933	LOCK;	1392	api_ready (coro_current);
934	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
935	UNLOCK;
936
937	prepare_schedule (ta);	1393	prepare_schedule (aTHX_ ta);
		1394	}
		1395
		1396	static int
		1397	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1398	{
		1399	if (coro_nready)
		1400	{
		1401	SV *prev = SvRV (coro_current);
		1402	prepare_schedule (aTHX_ ta);
		1403	api_ready (prev);
		1404	return 1;
		1405	}
		1406	else
		1407	return 0;
938	}	1408	}
939		1409
940	static void	1410	static void
941	api_schedule (void)	1411	api_schedule (void)
942	{	1412	{
943	dTHX;	1413	dTHX;
944	struct transfer_args ta;	1414	struct transfer_args ta;
945		1415
946	prepare_schedule (&ta);	1416	prepare_schedule (aTHX_ &ta);
947	TRANSFER (ta);	1417	TRANSFER (ta);
948	}	1418	}
949		1419
950	static void	1420	static int
951	api_cede (void)	1421	api_cede (void)
952	{	1422	{
953	dTHX;	1423	dTHX;
954	struct transfer_args ta;	1424	struct transfer_args ta;
955		1425
956	prepare_cede (&ta);	1426	prepare_cede (aTHX_ &ta);
		1427
		1428	if (expect_true (ta.prev != ta.next))
		1429	{
957	TRANSFER (ta);	1430	TRANSFER (ta);
		1431	return 1;
		1432	}
		1433	else
		1434	return 0;
958	}	1435	}
959		1436
		1437	static int
		1438	api_cede_notself (void)
		1439	{
		1440	dTHX;
		1441	struct transfer_args ta;
		1442
		1443	if (prepare_cede_notself (aTHX_ &ta))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
		1450	}
		1451
		1452	static void
		1453	api_trace (SV *coro_sv, int flags)
		1454	{
		1455	dTHX;
		1456	struct coro *coro = SvSTATE (coro_sv);
		1457
		1458	if (flags & CC_TRACE)
		1459	{
		1460	if (!coro->cctx)
		1461	coro->cctx = cctx_new ();
		1462	else if (!(coro->cctx->flags & CC_TRACE))
		1463	croak ("cannot enable tracing on coroutine with custom stack");
		1464
		1465	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1466	}
		1467	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1468	{
		1469	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1470
		1471	if (coro->flags & CF_RUNNING)
		1472	PL_runops = RUNOPS_DEFAULT;
		1473	else
		1474	coro->slot->runops = RUNOPS_DEFAULT;
		1475	}
		1476	}
		1477
960	MODULE = Coro::State PACKAGE = Coro::State	1478	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
961		1479
962	PROTOTYPES: DISABLE	1480	PROTOTYPES: DISABLE
963		1481
964	BOOT:	1482	BOOT:
965	{	1483	{
966	#ifdef USE_ITHREADS	1484	#ifdef USE_ITHREADS
967	MUTEX_INIT (&coro_mutex);	1485	MUTEX_INIT (&coro_mutex);
968	#endif	1486	#endif
969	BOOT_PAGESIZE;	1487	BOOT_PAGESIZE;
970		1488
		1489	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1490	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1491
		1492	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1493	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1494
		1495	if (!PL_diehook) PL_diehook = SvREFCNT_inc (sv_diehook);
		1496	if (!PL_warnhook) PL_warnhook = SvREFCNT_inc (sv_warnhook);
		1497
971	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1498	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
972		1499
973	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1500	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
974	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1501	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
975	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1502	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1503	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
976		1504
977	main_mainstack = PL_mainstack;	1505	main_mainstack = PL_mainstack;
		1506	main_top_env = PL_top_env;
		1507
		1508	while (main_top_env->je_prev)
		1509	main_top_env = main_top_env->je_prev;
978		1510
979	coroapi.ver = CORO_API_VERSION;	1511	coroapi.ver = CORO_API_VERSION;
980	coroapi.transfer = api_transfer;	1512	coroapi.transfer = api_transfer;
981		1513
982	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1514	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
989	struct coro *coro;	1521	struct coro *coro;
990	HV *hv;	1522	HV *hv;
991	int i;	1523	int i;
992		1524
993	Newz (0, coro, 1, struct coro);	1525	Newz (0, coro, 1, struct coro);
994	coro->args = newAV ();	1526	coro->args = newAV ();
		1527	coro->flags = CF_NEW;
995		1528
		1529	if (coro_first) coro_first->prev = coro;
		1530	coro->next = coro_first;
		1531	coro_first = coro;
		1532
996	hv = newHV ();	1533	coro->hv = hv = newHV ();
997	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1534	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
998	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1535	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
999		1536
		1537	av_extend (coro->args, items - 1);
1000	for (i = 1; i < items; i++)	1538	for (i = 1; i < items; i++)
1001	av_push (coro->args, newSVsv (ST (i)));	1539	av_push (coro->args, newSVsv (ST (i)));
1002	}	1540	}
1003	OUTPUT:	1541	OUTPUT:
1004	RETVAL	1542	RETVAL
1005		1543
		1544	# these not obviously related functions are all rolled into the same xs
		1545	# function to increase chances that they all will call transfer with the same
		1546	# stack offset
1006	void	1547	void
1007	_set_stacklevel (...)	1548	_set_stacklevel (...)
1008	ALIAS:	1549	ALIAS:
1009	Coro::State::transfer = 1	1550	Coro::State::transfer = 1
1010	Coro::schedule = 2	1551	Coro::schedule = 2
1011	Coro::cede = 3	1552	Coro::cede = 3
1012	Coro::Cont::yield = 4	1553	Coro::cede_notself = 4
1013	CODE:	1554	CODE:
1014	{	1555	{
1015	struct transfer_args ta;	1556	struct transfer_args ta;
1016		1557
1017	switch (ix)	1558	switch (ix)
1018	{	1559	{
1019	case 0:	1560	case 0:
1020	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1561	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1021	ta.next = 0;	1562	ta.next = 0;
1022	ta.flags = TRANSFER_SET_STACKLEVEL;
1023	break;	1563	break;
1024		1564
1025	case 1:	1565	case 1:
1026	if (items != 3)	1566	if (items != 2)
1027	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1567	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1028		1568
1029	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1569	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1030	break;	1570	break;
1031		1571
1032	case 2:	1572	case 2:
1033	prepare_schedule (&ta);	1573	prepare_schedule (aTHX_ &ta);
1034	break;	1574	break;
1035		1575
1036	case 3:	1576	case 3:
1037	prepare_cede (&ta);	1577	prepare_cede (aTHX_ &ta);
1038	break;	1578	break;
1039		1579
1040	case 4:	1580	case 4:
1041	{	1581	if (!prepare_cede_notself (aTHX_ &ta))
1042	SV *yieldstack;	1582	XSRETURN_EMPTY;
1043	SV *sv;
1044	AV *defav = GvAV (PL_defgv);
1045		1583
1046	yieldstack = *hv_fetch (
1047	(HV *)SvRV (GvSV (coro_current)),
1048	"yieldstack", sizeof ("yieldstack") - 1,
1049	0
1050	);
1051
1052	/* set up @_ -- ugly */
1053	av_clear (defav);
1054	av_fill (defav, items - 1);
1055	while (items--)
1056	av_store (defav, items, SvREFCNT_inc (ST(items)));
1057
1058	sv = av_pop ((AV *)SvRV (yieldstack));
1059	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1060	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1061	ta.flags = 0;
1062	SvREFCNT_dec (sv);
1063	}
1064	break;	1584	break;
1065
1066	}	1585	}
1067		1586
		1587	BARRIER;
1068	TRANSFER (ta);	1588	TRANSFER (ta);
1069	}
1070		1589
1071	void	1590	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1072	_clone_state_from (SV dst, SV src)	1591	XSRETURN_YES;
		1592	}
		1593
		1594	bool
		1595	_destroy (SV *coro_sv)
1073	CODE:	1596	CODE:
1074	{	1597	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1075	struct coro *coro_src = SvSTATE (src);	1598	OUTPUT:
1076		1599	RETVAL
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1081	}
1082		1600
1083	void	1601	void
1084	_exit (code)	1602	_exit (code)
1085	int code	1603	int code
1086	PROTOTYPE: $	1604	PROTOTYPE: $
1087	CODE:	1605	CODE:
1088	_exit (code);	1606	_exit (code);
1089		1607
1090	int	1608	int
		1609	cctx_stacksize (int new_stacksize = 0)
		1610	CODE:
		1611	RETVAL = coro_stacksize;
		1612	if (new_stacksize)
		1613	coro_stacksize = new_stacksize;
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	int
1091	cctx_count ()	1618	cctx_count ()
1092	CODE:	1619	CODE:
1093	RETVAL = cctx_count;	1620	RETVAL = cctx_count;
1094	OUTPUT:	1621	OUTPUT:
1095	RETVAL	1622	RETVAL
…		…
1099	CODE:	1626	CODE:
1100	RETVAL = cctx_idle;	1627	RETVAL = cctx_idle;
1101	OUTPUT:	1628	OUTPUT:
1102	RETVAL	1629	RETVAL
1103		1630
		1631	void
		1632	list ()
		1633	PPCODE:
		1634	{
		1635	struct coro *coro;
		1636	for (coro = coro_first; coro; coro = coro->next)
		1637	if (coro->hv)
		1638	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1639	}
		1640
		1641	void
		1642	call (Coro::State coro, SV *coderef)
		1643	ALIAS:
		1644	eval = 1
		1645	CODE:
		1646	{
		1647	if (coro->mainstack)
		1648	{
		1649	struct coro temp;
		1650
		1651	if (!(coro->flags & CF_RUNNING))
		1652	{
		1653	save_perl (aTHX_ &temp);
		1654	load_perl (aTHX_ coro);
		1655	}
		1656
		1657	{
		1658	dSP;
		1659	ENTER;
		1660	SAVETMPS;
		1661	PUSHMARK (SP);
		1662	PUTBACK;
		1663
		1664	if (ix)
		1665	eval_sv (coderef, 0);
		1666	else
		1667	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1668
		1669	SPAGAIN;
		1670	FREETMPS;
		1671	LEAVE;
		1672	PUTBACK;
		1673	}
		1674
		1675	if (!(coro->flags & CF_RUNNING))
		1676	{
		1677	save_perl (aTHX_ coro);
		1678	load_perl (aTHX_ &temp);
		1679	}
		1680	}
		1681	}
		1682
		1683	SV *
		1684	is_ready (Coro::State coro)
		1685	PROTOTYPE: $
		1686	ALIAS:
		1687	is_ready = CF_READY
		1688	is_running = CF_RUNNING
		1689	is_new = CF_NEW
		1690	is_destroyed = CF_DESTROYED
		1691	CODE:
		1692	RETVAL = boolSV (coro->flags & ix);
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	void
		1697	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1698
		1699	SV *
		1700	has_stack (Coro::State coro)
		1701	PROTOTYPE: $
		1702	CODE:
		1703	RETVAL = boolSV (!!coro->cctx);
		1704	OUTPUT:
		1705	RETVAL
		1706
		1707	int
		1708	is_traced (Coro::State coro)
		1709	PROTOTYPE: $
		1710	CODE:
		1711	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1712	OUTPUT:
		1713	RETVAL
		1714
		1715	IV
		1716	rss (Coro::State coro)
		1717	PROTOTYPE: $
		1718	ALIAS:
		1719	usecount = 1
		1720	CODE:
		1721	switch (ix)
		1722	{
		1723	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1724	case 1: RETVAL = coro->usecount; break;
		1725	}
		1726	OUTPUT:
		1727	RETVAL
		1728
		1729
1104	MODULE = Coro::State PACKAGE = Coro	1730	MODULE = Coro::State PACKAGE = Coro
1105		1731
1106	BOOT:	1732	BOOT:
1107	{	1733	{
1108	int i;	1734	int i;
1109		1735
		1736	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1737	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1738	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1739
		1740	coro_current = coro_get_sv ("Coro::current", FALSE);
		1741	SvREADONLY_on (coro_current);
		1742
1110	coro_stash = gv_stashpv ("Coro", TRUE);	1743	coro_stash = gv_stashpv ("Coro", TRUE);
1111		1744
1112	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1745	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1113	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1746	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1114	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1747	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1115	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1748	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1116	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1749	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1117	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1750	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1118		1751
1119	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1120	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1121
1122	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1752	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1123	coro_ready[i] = newAV ();	1753	coro_ready[i] = newAV ();
1124		1754
1125	{	1755	{
1126	SV *sv = perl_get_sv("Coro::API", 1);	1756	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1757	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1127		1758
1128	coroapi.schedule = api_schedule;	1759	coroapi.schedule = api_schedule;
1129	coroapi.cede = api_cede;	1760	coroapi.cede = api_cede;
		1761	coroapi.cede_notself = api_cede_notself;
1130	coroapi.ready = api_ready;	1762	coroapi.ready = api_ready;
		1763	coroapi.is_ready = api_is_ready;
1131	coroapi.nready = &coro_nready;	1764	coroapi.nready = &coro_nready;
1132	coroapi.current = coro_current;	1765	coroapi.current = coro_current;
1133		1766
1134	GCoroAPI = &coroapi;	1767	GCoroAPI = &coroapi;
1135	sv_setiv (sv, (IV)&coroapi);	1768	sv_setiv (sv, (IV)&coroapi);
1136	SvREADONLY_on (sv);	1769	SvREADONLY_on (sv);
1137	}	1770	}
1138	}	1771	}
		1772
		1773	void
		1774	_set_current (SV *current)
		1775	PROTOTYPE: $
		1776	CODE:
		1777	SvREFCNT_dec (SvRV (coro_current));
		1778	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1139		1779
1140	int	1780	int
1141	prio (Coro::State coro, int newprio = 0)	1781	prio (Coro::State coro, int newprio = 0)
1142	ALIAS:	1782	ALIAS:
1143	nice = 1	1783	nice = 1
…		…
1146	RETVAL = coro->prio;	1786	RETVAL = coro->prio;
1147		1787
1148	if (items > 1)	1788	if (items > 1)
1149	{	1789	{
1150	if (ix)	1790	if (ix)
1151	newprio += coro->prio;	1791	newprio = coro->prio - newprio;
1152		1792
1153	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1793	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1154	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1794	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1155		1795
1156	coro->prio = newprio;	1796	coro->prio = newprio;
1157	}	1797	}
1158	}	1798	}
		1799	OUTPUT:
		1800	RETVAL
1159		1801
1160	void	1802	SV *
1161	ready (SV *self)	1803	ready (SV *self)
1162	PROTOTYPE: $	1804	PROTOTYPE: $
1163	CODE:	1805	CODE:
1164	api_ready (self);	1806	RETVAL = boolSV (api_ready (self));
		1807	OUTPUT:
		1808	RETVAL
1165		1809
1166	int	1810	int
1167	nready (...)	1811	nready (...)
1168	PROTOTYPE:	1812	PROTOTYPE:
1169	CODE:	1813	CODE:
1170	RETVAL = coro_nready;	1814	RETVAL = coro_nready;
1171	OUTPUT:	1815	OUTPUT:
1172	RETVAL	1816	RETVAL
1173		1817
		1818	void
		1819	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1820	PROTOTYPE: $;$
		1821	CODE:
		1822	SvREFCNT_dec (self->throw);
		1823	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1824
		1825	# for async_pool speedup
		1826	void
		1827	_pool_1 (SV *cb)
		1828	CODE:
		1829	{
		1830	struct coro *coro = SvSTATE (coro_current);
		1831	HV hv = (HV )SvRV (coro_current);
		1832	AV *defav = GvAV (PL_defgv);
		1833	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1834	AV *invoke_av;
		1835	int i, len;
		1836
		1837	if (!invoke)
		1838	croak ("\3async_pool terminate\2\n");
		1839
		1840	SvREFCNT_dec (coro->saved_deffh);
		1841	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1842
		1843	hv_store (hv, "desc", sizeof ("desc") - 1,
		1844	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1845
		1846	invoke_av = (AV *)SvRV (invoke);
		1847	len = av_len (invoke_av);
		1848
		1849	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1850
		1851	if (len > 0)
		1852	{
		1853	av_fill (defav, len - 1);
		1854	for (i = 0; i < len; ++i)
		1855	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1856	}
		1857
		1858	SvREFCNT_dec (invoke);
		1859	}
		1860
		1861	void
		1862	_pool_2 (SV *cb)
		1863	CODE:
		1864	{
		1865	struct coro *coro = SvSTATE (coro_current);
		1866
		1867	sv_setsv (cb, &PL_sv_undef);
		1868
		1869	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1870	coro->saved_deffh = 0;
		1871
		1872	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1873	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1874	croak ("\3async_pool terminate\2\n");
		1875
		1876	av_clear (GvAV (PL_defgv));
		1877	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1878	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1879
		1880	coro->prio = 0;
		1881
		1882	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1883	api_trace (coro_current, 0);
		1884
		1885	av_push (av_async_pool, newSVsv (coro_current));
		1886	}
		1887
		1888
1174	MODULE = Coro::State PACKAGE = Coro::AIO	1889	MODULE = Coro::State PACKAGE = Coro::AIO
1175		1890
1176	SV *	1891	SV *
1177	_get_state ()	1892	_get_state ()
1178	CODE:	1893	CODE:
1179	{	1894	{
1180	struct {	1895	struct io_state *data;
1181	int errorno;
1182	int laststype;
1183	int laststatval;
1184	Stat_t statcache;
1185	} data;
1186		1896
		1897	RETVAL = newSV (sizeof (struct io_state));
		1898	data = (struct io_state *)SvPVX (RETVAL);
		1899	SvCUR_set (RETVAL, sizeof (struct io_state));
		1900	SvPOK_only (RETVAL);
		1901
1187	data.errorno = errno;	1902	data->errorno = errno;
1188	data.laststype = PL_laststype;	1903	data->laststype = PL_laststype;
1189	data.laststatval = PL_laststatval;	1904	data->laststatval = PL_laststatval;
1190	data.statcache = PL_statcache;	1905	data->statcache = PL_statcache;
1191
1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
1193	}	1906	}
1194	OUTPUT:	1907	OUTPUT:
1195	RETVAL	1908	RETVAL
1196		1909
1197	void	1910	void
1198	_set_state (char *data_)	1911	_set_state (char *data_)
1199	PROTOTYPE: $	1912	PROTOTYPE: $
1200	CODE:	1913	CODE:
1201	{	1914	{
1202	struct {	1915	struct io_state data = (void )data_;
1203	int errorno;
1204	int laststype;
1205	int laststatval;
1206	Stat_t statcache;
1207	} data = (void )data_;
1208		1916
1209	errno = data->errorno;	1917	errno = data->errorno;
1210	PL_laststype = data->laststype;	1918	PL_laststype = data->laststype;
1211	PL_laststatval = data->laststatval;	1919	PL_laststatval = data->laststatval;
1212	PL_statcache = data->statcache;	1920	PL_statcache = data->statcache;
1213	}	1921	}
		1922

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Comparing Coro/Coro/State.xs (file contents): Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC vs. Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC vs.
Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC