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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.132 by root, Fri Dec 29 13:03:05 2006 UTC vs.
Revision 1.208 by root, Wed Oct 10 00:53:18 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
31	#else	34	#else
32	# define PAGESIZE 0	35	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	36	# define BOOT_PAGESIZE (void)0
34	#endif	37	#endif
35		38
36	#if USE_VALGRIND	39	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
38	#endif	44	#endif
39		45
40	/* the maximum number of idle cctx that will be pooled */	46	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	47	#define MAX_IDLE_CCTX 8
42		48
…		…
70	/* 5.8.7 */	76	/* 5.8.7 */
71	#ifndef SvRV_set	77	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	78	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	79	#endif
74		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
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	90	# undef CORO_STACKGUARD
77	#endif	91	#endif
78		92
79	#ifndef STACKGUARD	93	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	94	# define CORO_STACKGUARD 0
81	#endif	95	#endif
82		96
83	/* prefer perl internal functions over our own? */	97	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	98	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	99	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	100	#endif
87		101
88	/* The next macro should declare a variable stacklevel that contains and approximation	102	/* The next macros try to return the current stack pointer, in an as
89	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
90	* and should be unique. */
91	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
92	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
93		106
94	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
95		108
96	#if __GNUC__ >= 3	109	#if __GNUC__ >= 3
97	# define attribute(x) __attribute__(x)	110	# define attribute(x) __attribute__(x)
98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
99	#else	113	#else
100	# define attribute(x)	114	# define attribute(x)
101	# define BARRIER	115	# define BARRIER
		116	# define expect(expr,value) (expr)
102	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
103		121
104	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
105		123
106	#include "CoroAPI.h"	124	#include "CoroAPI.h"
107		125
…		…
112	#else	130	#else
113	# define LOCK (void)0	131	# define LOCK (void)0
114	# define UNLOCK (void)0	132	# define UNLOCK (void)0
115	#endif	133	#endif
116		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
117	struct io_state	138	struct io_state
118	{	139	{
119	int errorno;	140	int errorno;
120	I32 laststype;	141	I32 laststype;
121	int laststatval;	142	int laststatval;
122	Stat_t statcache;	143	Stat_t statcache;
123	};	144	};
124		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
125	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
126	static AV main_mainstack; / used to differentiate between $main and others */	148	static AV main_mainstack; / used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
127	static HV coro_state_stash, coro_stash;	150	static HV coro_state_stash, coro_stash;
128	static SV coro_mortal; / will be freed after next transfer */	151	static SV coro_mortal; / will be freed after next transfer */
129		152
		153	static GV irsgv; / $/ */
		154	static GV stdoutgv; / STDOUT /
		155
		156	static HV hv_sig; / %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
130	static struct coro_cctx *cctx_first;	165	static struct coro_cctx *cctx_first;
131	static int cctx_count, cctx_idle;	166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		175	};
132		176
133	/* this is a structure representing a c-level coroutine */	177	/* this is a structure representing a c-level coroutine */
134	typedef struct coro_cctx {	178	typedef struct coro_cctx {
135	struct coro_cctx *next;	179	struct coro_cctx *next;
136		180
137	/* the stack */	181	/* the stack */
138	void *sptr;	182	void *sptr;
139	long ssize; /* positive == mmap, otherwise malloc */	183	size_t ssize;
140		184
141	/* cpu state */	185	/* cpu state */
142	void idle_sp; / sp of top-level transfer/schedule/cede call */	186	void idle_sp; / sp of top-level transfer/schedule/cede call */
143	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */	187	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
144	JMPENV *top_env;	188	JMPENV *top_env;
145	coro_context cctx;	189	coro_context cctx;
146		190
147	int inuse;
148
149	#if USE_VALGRIND	191	#if CORO_USE_VALGRIND
150	int valgrind_id;	192	int valgrind_id;
151	#endif	193	#endif
		194	unsigned char flags;
152	} coro_cctx;	195	} coro_cctx;
153		196
154	enum {	197	enum {
155	CF_RUNNING = 0x0001, /* coroutine is running */	198	CF_RUNNING = 0x0001, /* coroutine is running */
156	CF_READY = 0x0002, /* coroutine is ready */	199	CF_READY = 0x0002, /* coroutine is ready */
157	CF_NEW = 0x0004, /* ahs never been switched to */	200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
158	};	202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		205	typedef struct {
		206	SV *defsv;
		207	AV *defav;
		208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
		214
		215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
159		216
160	/* this is a structure representing a perl-level coroutine */	217	/* this is a structure representing a perl-level coroutine */
161	struct coro {	218	struct coro {
162	/* the c coroutine allocated to this perl coroutine, if any */	219	/* the c coroutine allocated to this perl coroutine, if any */
163	coro_cctx *cctx;	220	coro_cctx *cctx;
164		221
		222	/* process data */
		223	AV *mainstack;
		224	perl_slots slot; / basically the saved sp */
		225
165	/* data associated with this coroutine (initial args) */	226	AV args; / data associated with this coroutine (initial args) */
166	AV *args;	227	int refcnt; /* coroutines are refcounted, yes */
167	int refcnt;
168	int save; /* CORO_SAVE flags */
169	int flags; /* CF_ flags */	228	int flags; /* CF_ flags */
		229	HV hv; / the perl hash associated with this coro, if any */
170		230
171	/* optionally saved, might be zero */	231	/* statistics */
172	AV defav; / @_ */	232	int usecount; /* number of transfers to this coro */
173	SV defsv; / $_ */
174	SV errsv; / $@ */
175	SV irssv; / $/ */
176	SV irssv_sv; / real $/ cache */
177
178	#define VAR(name,type) type name;
179	# include "state.h"
180	#undef VAR
181		233
182	/* coro process data */	234	/* coro process data */
183	int prio;	235	int prio;
		236	SV throw; / exception to be thrown */
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro next, prev;
184	};	243	};
185		244
186	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
187	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
188		247
		248	/ Coro ******************************************************************/
		249
		250	#define PRIO_MAX 3
		251	#define PRIO_HIGH 1
		252	#define PRIO_NORMAL 0
		253	#define PRIO_LOW -1
		254	#define PRIO_IDLE -3
		255	#define PRIO_MIN -4
		256
		257	/* for Coro.pm */
		258	static SV *coro_current;
		259	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		260	static int coro_nready;
		261	static struct coro *coro_first;
		262
		263	/ lowlevel stuff ********************************************************/
		264
		265	static SV *
		266	coro_get_sv (const char *name, int create)
		267	{
		268	#if PERL_VERSION_ATLEAST (5,9,0)
		269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		270	get_sv (name, create);
		271	#endif
		272	return get_sv (name, create);
		273	}
		274
189	static AV *	275	static AV *
		276	coro_get_av (const char *name, int create)
		277	{
		278	#if PERL_VERSION_ATLEAST (5,9,0)
		279	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		280	get_av (name, create);
		281	#endif
		282	return get_av (name, create);
		283	}
		284
		285	static HV *
		286	coro_get_hv (const char *name, int create)
		287	{
		288	#if PERL_VERSION_ATLEAST (5,9,0)
		289	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		290	get_hv (name, create);
		291	#endif
		292	return get_hv (name, create);
		293	}
		294
		295	static AV *
190	coro_clone_padlist (CV *cv)	296	coro_clone_padlist (pTHX_ CV *cv)
191	{	297	{
192	AV *padlist = CvPADLIST (cv);	298	AV *padlist = CvPADLIST (cv);
193	AV newpadlist, newpad;	299	AV newpadlist, newpad;
194		300
195	newpadlist = newAV ();	301	newpadlist = newAV ();
…		…
207		313
208	return newpadlist;	314	return newpadlist;
209	}	315	}
210		316
211	static void	317	static void
212	free_padlist (AV *padlist)	318	free_padlist (pTHX_ AV *padlist)
213	{	319	{
214	/* may be during global destruction */	320	/* may be during global destruction */
215	if (SvREFCNT (padlist))	321	if (SvREFCNT (padlist))
216	{	322	{
217	I32 i = AvFILLp (padlist);	323	I32 i = AvFILLp (padlist);
…		…
238	AV *padlist;	344	AV *padlist;
239	AV av = (AV )mg->mg_obj;	345	AV av = (AV )mg->mg_obj;
240		346
241	/* casting is fun. */	347	/* casting is fun. */
242	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	348	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
243	free_padlist (padlist);	349	free_padlist (aTHX_ padlist);
244		350
245	SvREFCNT_dec (av);	351	SvREFCNT_dec (av);
246		352
247	return 0;	353	return 0;
248	}	354	}
…		…
256	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	362	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
257	? SvMAGIC (cv) \	363	? SvMAGIC (cv) \
258	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	364	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
259	: 0	365	: 0
260		366
		367	static struct coro *
		368	SvSTATE_ (pTHX_ SV *coro)
		369	{
		370	HV *stash;
		371	MAGIC *mg;
		372
		373	if (SvROK (coro))
		374	coro = SvRV (coro);
		375
		376	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		377	croak ("Coro::State object required");
		378
		379	stash = SvSTASH (coro);
		380	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		381	{
		382	/* very slow, but rare, check */
		383	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		384	croak ("Coro::State object required");
		385	}
		386
		387	mg = CORO_MAGIC (coro);
		388	return (struct coro *)mg->mg_ptr;
		389	}
		390
		391	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		392
261	/* the next two functions merely cache the padlists */	393	/* the next two functions merely cache the padlists */
262	static void	394	static void
263	get_padlist (CV *cv)	395	get_padlist (pTHX_ CV *cv)
264	{	396	{
265	MAGIC *mg = CORO_MAGIC (cv);	397	MAGIC *mg = CORO_MAGIC (cv);
266	AV *av;	398	AV *av;
267		399
268	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
269	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
270	else	402	else
271	{	403	{
272	#if PREFER_PERL_FUNCTIONS	404	#if CORO_PREFER_PERL_FUNCTIONS
273	/* this is probably cleaner, but also slower? */	405	/* this is probably cleaner, but also slower? */
274	CV *cp = Perl_cv_clone (cv);	406	CV *cp = Perl_cv_clone (cv);
275	CvPADLIST (cv) = CvPADLIST (cp);	407	CvPADLIST (cv) = CvPADLIST (cp);
276	CvPADLIST (cp) = 0;	408	CvPADLIST (cp) = 0;
277	SvREFCNT_dec (cp);	409	SvREFCNT_dec (cp);
278	#else	410	#else
279	CvPADLIST (cv) = coro_clone_padlist (cv);	411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
280	#endif	412	#endif
281	}	413	}
282	}	414	}
283		415
284	static void	416	static void
285	put_padlist (CV *cv)	417	put_padlist (pTHX_ CV *cv)
286	{	418	{
287	MAGIC *mg = CORO_MAGIC (cv);	419	MAGIC *mg = CORO_MAGIC (cv);
288	AV *av;	420	AV *av;
289		421
290	if (!mg)	422	if (expect_false (!mg))
291	{	423	{
292	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
293	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
294	mg->mg_virtual = &vtbl_coro;	426	mg->mg_virtual = &vtbl_coro;
295	mg->mg_obj = (SV *)newAV ();	427	mg->mg_obj = (SV *)newAV ();
296	}	428	}
297		429
298	av = (AV *)mg->mg_obj;	430	av = (AV *)mg->mg_obj;
299		431
300	if (AvFILLp (av) >= AvMAX (av))	432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
301	av_extend (av, AvMAX (av) + 1);	433	av_extend (av, AvMAX (av) + 1);
302		434
303	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
304	}	436	}
305		437
306	#define SB do {	438	/ load & save, init *****************************************************/
307	#define SE } while (0)
308		439
309	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
310
311	static void	440	static void
312	load_perl (Coro__State c)	441	load_perl (pTHX_ Coro__State c)
313	{	442	{
		443	perl_slots *slot = c->slot;
		444	c->slot = 0;
		445
		446	PL_mainstack = c->mainstack;
		447
		448	GvSV (PL_defgv) = slot->defsv;
		449	GvAV (PL_defgv) = slot->defav;
		450	GvSV (PL_errgv) = slot->errsv;
		451	GvSV (irsgv) = slot->irsgv;
		452
314	#define VAR(name,type) PL_ ## name = c->name;	453	#define VAR(name,type) PL_ ## name = slot->name;
315	# include "state.h"	454	# include "state.h"
316	#undef VAR	455	#undef VAR
317		456
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	457	/hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);/
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	458	/hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);/
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321	if (c->irssv)
322	{
323	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
324	SvREFCNT_dec (c->irssv);
325	else
326	{
327	REPLACE_SV (PL_rs, c->irssv);
328	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
329	sv_setsv (c->irssv_sv, PL_rs);
330	}
331	}
332		459
333	{	460	{
334	dSP;	461	dSP;
		462
335	CV *cv;	463	CV *cv;
336		464
337	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
338	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
339	{	467	{
340	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
341	CvDEPTH (cv) = PTR2IV (POPs);	469	CvDEPTH (cv) = PTR2IV (POPs);
342	CvPADLIST (cv) = (AV *)POPs;	470	CvPADLIST (cv) = (AV *)POPs;
343	}	471	}
344		472
345	PUTBACK;	473	PUTBACK;
346	}	474	}
347	}	475	}
348		476
349	static void	477	static void
350	save_perl (Coro__State c)	478	save_perl (pTHX_ Coro__State c)
351	{	479	{
352	{	480	{
353	dSP;	481	dSP;
354	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
355	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
358	/*	486	/*
359	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
360	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
361	*/	489	*/
362		490
363	EXTEND (SP, 3 + 1);
364	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
365	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
366	for (;;)	493	for (;;)
367	{	494	{
368	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
369	{	496	{
370	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
371		498
372	if (CxTYPE (cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
373	{	500	{
374	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
375		502
376	if (CvDEPTH (cv))	503	if (expect_true (CvDEPTH (cv)))
377	{	504	{
378	EXTEND (SP, 3);	505	EXTEND (SP, 3);
379	PUSHs ((SV *)CvPADLIST (cv));	506	PUSHs ((SV *)CvPADLIST (cv));
380	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
382		509
383	CvDEPTH (cv) = 0;	510	CvDEPTH (cv) = 0;
384	get_padlist (cv);	511	get_padlist (aTHX_ cv);
385	}	512	}
386	}	513	}
387	}	514	}
388		515
389	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
390	break;	517	break;
391		518
392	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
393	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
394	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
395	}	522	}
396		523
397	PUTBACK;	524	PUTBACK;
398	}	525	}
399		526
400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
403	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
404		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		543
		544	slot->defav = GvAV (PL_defgv);
		545	slot->defsv = DEFSV;
		546	slot->errsv = ERRSV;
		547	slot->irsgv = GvSV (irsgv);
		548
405	#define VAR(name,type)c->name = PL_ ## name;	549	#define VAR(name,type) slot->name = PL_ ## name;
406	# include "state.h"	550	# include "state.h"
407	#undef VAR	551	#undef VAR
		552	}
408	}	553	}
409		554
410	/*	555	/*
411	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
412	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
413	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
414	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
415	*/	560	*/
416	#if PREFER_PERL_FUNCTIONS	561	#if CORO_PREFER_PERL_FUNCTIONS
417	# define coro_init_stacks init_stacks	562	# define coro_init_stacks init_stacks
418	#else	563	#else
419	static void	564	static void
420	coro_init_stacks ()	565	coro_init_stacks (pTHX)
421	{	566	{
422	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	567	PL_curstackinfo = new_stackinfo(32, 8);
423	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
424	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
425	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
426		571
427	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
428	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
429	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
430		575
431	New(50,PL_tmps_stack,128,SV*);	576	New(50,PL_tmps_stack,32,SV*);
432	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
433	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
434	PL_tmps_max = 128;	579	PL_tmps_max = 32;
435		580
436	New(54,PL_markstack,32,I32);	581	New(54,PL_markstack,16,I32);
437	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
438	PL_markstack_max = PL_markstack + 32;	583	PL_markstack_max = PL_markstack + 16;
439		584
440	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
441	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
442	#endif	587	#endif
443		588
444	New(54,PL_scopestack,32,I32);	589	New(54,PL_scopestack,8,I32);
445	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
446	PL_scopestack_max = 32;	591	PL_scopestack_max = 8;
447		592
448	New(54,PL_savestack,64,ANY);	593	New(54,PL_savestack,24,ANY);
449	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
450	PL_savestack_max = 64;	595	PL_savestack_max = 24;
451		596
452	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,9,0)
453	New(54,PL_retstack,16,OP*);	598	New(54,PL_retstack,4,OP*);
454	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
455	PL_retstack_max = 16;	600	PL_retstack_max = 4;
456	#endif	601	#endif
457	}	602	}
458	#endif	603	#endif
459		604
460	/*	605	/*
461	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
462	*/	607	*/
463	static void	608	static void
464	coro_destroy_stacks ()	609	coro_destroy_stacks (pTHX)
465	{	610	{
466	if (!IN_DESTRUCT)
467	{
468	/* restore all saved variables and stuff */
469	LEAVE_SCOPE (0);
470	assert (PL_tmps_floor == -1);
471
472	/* free all temporaries */
473	FREETMPS;
474	assert (PL_tmps_ix == -1);
475
476	POPSTACK_TO (PL_mainstack);
477	}
478
479	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
480	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
481		613
482	while (PL_curstackinfo)	614	while (PL_curstackinfo)
483	{	615	{
…		…
498	#if !PERL_VERSION_ATLEAST (5,9,0)	630	#if !PERL_VERSION_ATLEAST (5,9,0)
499	Safefree (PL_retstack);	631	Safefree (PL_retstack);
500	#endif	632	#endif
501	}	633	}
502		634
503	static void	635	static size_t
504	setup_coro (struct coro *coro)	636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/ coroutine stack handling **********************************************/
		673
		674	static void
		675	coro_setup (pTHX_ struct coro *coro)
505	{	676	{
506	/*	677	/*
507	* emulate part of the perl startup here.	678	* emulate part of the perl startup here.
508	*/	679	*/
509
510	coro_init_stacks ();	680	coro_init_stacks (aTHX);
511		681
		682	PL_runops = RUNOPS_DEFAULT;
512	PL_curcop = &PL_compiling;	683	PL_curcop = &PL_compiling;
513	PL_in_eval = EVAL_NULL;	684	PL_in_eval = EVAL_NULL;
		685	PL_comppad = 0;
514	PL_curpm = 0;	686	PL_curpm = 0;
		687	PL_curpad = 0;
515	PL_localizing = 0;	688	PL_localizing = 0;
516	PL_dirty = 0;	689	PL_dirty = 0;
517	PL_restartop = 0;	690	PL_restartop = 0;
		691	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		692	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		693
		694	GvSV (PL_defgv) = newSV (0);
		695	GvAV (PL_defgv) = coro->args; coro->args = 0;
		696	GvSV (PL_errgv) = newSV (0);
		697	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		698	PL_rs = newSVsv (GvSV (irsgv));
		699	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
518		700
519	{	701	{
520	dSP;	702	dSP;
521	LOGOP myop;	703	LOGOP myop;
522		704
523	SvREFCNT_dec (GvAV (PL_defgv));
524	GvAV (PL_defgv) = coro->args; coro->args = 0;
525
526	Zero (&myop, 1, LOGOP);	705	Zero (&myop, 1, LOGOP);
527	myop.op_next = Nullop;	706	myop.op_next = Nullop;
528	myop.op_flags = OPf_WANT_VOID;	707	myop.op_flags = OPf_WANT_VOID;
529		708
530	PUSHMARK (SP);	709	PUSHMARK (SP);
531	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	710	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
532	PUTBACK;	711	PUTBACK;
533	PL_op = (OP *)&myop;	712	PL_op = (OP *)&myop;
534	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	713	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535	SPAGAIN;	714	SPAGAIN;
536	}	715	}
537		716
538	ENTER; /* necessary e.g. for dounwind */	717	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
539	}	718	}
540		719
541	static void	720	static void
		721	coro_destroy (pTHX_ struct coro *coro)
		722	{
		723	if (!IN_DESTRUCT)
		724	{
		725	/* restore all saved variables and stuff */
		726	LEAVE_SCOPE (0);
		727	assert (PL_tmps_floor == -1);
		728
		729	/* free all temporaries */
		730	FREETMPS;
		731	assert (PL_tmps_ix == -1);
		732
		733	/* unwind all extra stacks */
		734	POPSTACK_TO (PL_mainstack);
		735
		736	/* unwind main stack */
		737	dounwind (-1);
		738	}
		739
		740	SvREFCNT_dec (GvSV (PL_defgv));
		741	SvREFCNT_dec (GvAV (PL_defgv));
		742	SvREFCNT_dec (GvSV (PL_errgv));
		743	SvREFCNT_dec (PL_defoutgv);
		744	SvREFCNT_dec (PL_rs);
		745	SvREFCNT_dec (GvSV (irsgv));
		746
		747	SvREFCNT_dec (PL_diehook);
		748	SvREFCNT_dec (PL_warnhook);
		749
		750	SvREFCNT_dec (coro->saved_deffh);
		751	SvREFCNT_dec (coro->throw);
		752
		753	coro_destroy_stacks (aTHX);
		754	}
		755
		756	static void
542	free_coro_mortal ()	757	free_coro_mortal (pTHX)
543	{	758	{
544	if (coro_mortal)	759	if (expect_true (coro_mortal))
545	{	760	{
546	SvREFCNT_dec (coro_mortal);	761	SvREFCNT_dec (coro_mortal);
547	coro_mortal = 0;	762	coro_mortal = 0;
548	}	763	}
549	}	764	}
550		765
		766	static int
		767	runops_trace (pTHX)
		768	{
		769	COP *oldcop = 0;
		770	int oldcxix = -2;
		771	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		772	coro_cctx *cctx = coro->cctx;
		773
		774	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		775	{
		776	PERL_ASYNC_CHECK ();
		777
		778	if (cctx->flags & CC_TRACE_ALL)
		779	{
		780	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		781	{
		782	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		783	SV bot, top;
		784	AV av = newAV (); / return values */
		785	SV **cb;
		786	dSP;
		787
		788	GV *gv = CvGV (cx->blk_sub.cv);
		789	SV *fullname = sv_2mortal (newSV (0));
		790	if (isGV (gv))
		791	gv_efullname3 (fullname, gv, 0);
		792
		793	bot = PL_stack_base + cx->blk_oldsp + 1;
		794	top = cx->blk_gimme == G_ARRAY ? SP + 1
		795	: cx->blk_gimme == G_SCALAR ? bot + 1
		796	: bot;
		797
		798	av_extend (av, top - bot);
		799	while (bot < top)
		800	av_push (av, SvREFCNT_inc (*bot++));
		801
		802	PL_runops = RUNOPS_DEFAULT;
		803	ENTER;
		804	SAVETMPS;
		805	EXTEND (SP, 3);
		806	PUSHMARK (SP);
		807	PUSHs (&PL_sv_no);
		808	PUSHs (fullname);
		809	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		810	PUTBACK;
		811	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		812	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		813	SPAGAIN;
		814	FREETMPS;
		815	LEAVE;
		816	PL_runops = runops_trace;
		817	}
		818
		819	if (oldcop != PL_curcop)
		820	{
		821	oldcop = PL_curcop;
		822
		823	if (PL_curcop != &PL_compiling)
		824	{
		825	SV **cb;
		826
		827	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		828	{
		829	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		830
		831	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		832	{
		833	runops_proc_t old_runops = PL_runops;
		834	dSP;
		835	GV *gv = CvGV (cx->blk_sub.cv);
		836	SV *fullname = sv_2mortal (newSV (0));
		837
		838	if (isGV (gv))
		839	gv_efullname3 (fullname, gv, 0);
		840
		841	PL_runops = RUNOPS_DEFAULT;
		842	ENTER;
		843	SAVETMPS;
		844	EXTEND (SP, 3);
		845	PUSHMARK (SP);
		846	PUSHs (&PL_sv_yes);
		847	PUSHs (fullname);
		848	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		849	PUTBACK;
		850	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		851	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		852	SPAGAIN;
		853	FREETMPS;
		854	LEAVE;
		855	PL_runops = runops_trace;
		856	}
		857
		858	oldcxix = cxstack_ix;
		859	}
		860
		861	if (cctx->flags & CC_TRACE_LINE)
		862	{
		863	dSP;
		864
		865	PL_runops = RUNOPS_DEFAULT;
		866	ENTER;
		867	SAVETMPS;
		868	EXTEND (SP, 3);
		869	PL_runops = RUNOPS_DEFAULT;
		870	PUSHMARK (SP);
		871	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		872	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		873	PUTBACK;
		874	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		875	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		876	SPAGAIN;
		877	FREETMPS;
		878	LEAVE;
		879	PL_runops = runops_trace;
		880	}
		881	}
		882	}
		883	}
		884	}
		885
		886	TAINT_NOT;
		887	return 0;
		888	}
		889
551	/* inject a fake call to Coro::State::_cctx_init into the execution */	890	/* inject a fake call to Coro::State::_cctx_init into the execution */
		891	/* _cctx_init should be careful, as it could be called at almost any time */
		892	/* during execution of a perl program */
552	static void NOINLINE	893	static void NOINLINE
553	prepare_cctx (coro_cctx *cctx)	894	cctx_prepare (pTHX_ coro_cctx *cctx)
554	{	895	{
555	dSP;	896	dSP;
556	LOGOP myop;	897	LOGOP myop;
		898
		899	PL_top_env = &PL_start_env;
		900
		901	if (cctx->flags & CC_TRACE)
		902	PL_runops = runops_trace;
557		903
558	Zero (&myop, 1, LOGOP);	904	Zero (&myop, 1, LOGOP);
559	myop.op_next = PL_op;	905	myop.op_next = PL_op;
560	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	906	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
561		907
…		…
567	PL_op = (OP *)&myop;	913	PL_op = (OP *)&myop;
568	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	914	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
569	SPAGAIN;	915	SPAGAIN;
570	}	916	}
571		917
		918	/*
		919	* this is a _very_ stripped down perl interpreter ;)
		920	*/
572	static void	921	static void
573	coro_run (void *arg)	922	cctx_run (void *arg)
574	{	923	{
		924	dTHX;
		925
575	/* coro_run is the alternative tail of transfer(), so unlock here. */	926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
576	UNLOCK;	927	UNLOCK;
577		928
578	/*	929	/* we now skip the entersub that lead to transfer() */
579	* this is a _very_ stripped down perl interpreter ;)	930	PL_op = PL_op->op_next;
580	*/
581	PL_top_env = &PL_start_env;
582		931
583	/* inject call to cctx_init */	932	/* inject a fake subroutine call to cctx_init */
584	prepare_cctx ((coro_cctx *)arg);	933	cctx_prepare (aTHX_ (coro_cctx *)arg);
585		934
586	/* somebody will hit me for both perl_run and PL_restartop */	935	/* somebody or something will hit me for both perl_run and PL_restartop */
587	PL_restartop = PL_op;	936	PL_restartop = PL_op;
588	perl_run (PL_curinterp);	937	perl_run (PL_curinterp);
589		938
590	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	939	/*
591	abort ();	940	* If perl-run returns we assume exit() was being called or the coro
		941	* fell off the end, which seems to be the only valid (non-bug)
		942	* reason for perl_run to return. We try to exit by jumping to the
		943	* bootstrap-time "top" top_env, as we cannot restore the "main"
		944	* coroutine as Coro has no such concept
		945	*/
		946	PL_top_env = main_top_env;
		947	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
592	}	948	}
593		949
594	static coro_cctx *	950	static coro_cctx *
595	cctx_new ()	951	cctx_new ()
596	{	952	{
597	coro_cctx *cctx;	953	coro_cctx *cctx;
		954	void *stack_start;
		955	size_t stack_size;
598		956
599	++cctx_count;	957	++cctx_count;
600		958
601	Newz (0, cctx, 1, coro_cctx);	959	Newz (0, cctx, 1, coro_cctx);
602		960
603	#if HAVE_MMAP	961	#if HAVE_MMAP
604
605	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
606	/* mmap supposedly does allocate-on-write for us */	963	/* mmap supposedly does allocate-on-write for us */
607	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
608		965
609	if (cctx->sptr == (void *)-1)	966	if (cctx->sptr != (void *)-1)
610	{
611	perror ("FATAL: unable to mmap stack for coroutine");
612	_exit (EXIT_FAILURE);
613	}	967	{
614
615	# if STACKGUARD	968	# if CORO_STACKGUARD
616	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
617	# endif	970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags \|= CC_MAPPED;
		974	}
		975	else
		976	#endif
		977	{
		978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
618		980
619	#else
620
621	cctx->ssize = STACKSIZE * (long)sizeof (long);
622	New (0, cctx->sptr, STACKSIZE, long);
623
624	if (!cctx->sptr)	981	if (!cctx->sptr)
625	{	982	{
626	perror ("FATAL: unable to malloc stack for coroutine");	983	perror ("FATAL: unable to allocate stack for coroutine");
627	_exit (EXIT_FAILURE);	984	_exit (EXIT_FAILURE);
628	}	985	}
629		986
630	#endif	987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
631		990
632	#if USE_VALGRIND	991	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
633	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	992	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
634	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
635	cctx->ssize + (char *)cctx->sptr
636	);
637	#endif
638
639	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
640		993
641	return cctx;	994	return cctx;
642	}	995	}
643		996
644	static void	997	static void
…		…
647	if (!cctx)	1000	if (!cctx)
648	return;	1001	return;
649		1002
650	--cctx_count;	1003	--cctx_count;
651		1004
652	#if USE_VALGRIND	1005	#if CORO_USE_VALGRIND
653	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
654	#endif	1007	#endif
655		1008
656	#if HAVE_MMAP	1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
657	munmap (cctx->sptr, cctx->ssize);	1011	munmap (cctx->sptr, cctx->ssize);
658	#else	1012	else
		1013	#endif
659	Safefree (cctx->sptr);	1014	Safefree (cctx->sptr);
660	#endif
661		1015
662	Safefree (cctx);	1016	Safefree (cctx);
663	}	1017	}
664		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1021
665	static coro_cctx *	1022	static coro_cctx *
666	cctx_get ()	1023	cctx_get (pTHX)
667	{	1024	{
668	coro_cctx *cctx;	1025	while (expect_true (cctx_first))
669
670	if (cctx_first)
671	{	1026	{
672	cctx = cctx_first;	1027	coro_cctx *cctx = cctx_first;
673	cctx_first = cctx->next;	1028	cctx_first = cctx->next;
674	--cctx_idle;	1029	--cctx_idle;
675	}	1030
676	else	1031	if (expect_true (!CCTX_EXPIRED (cctx)))
677	{	1032	return cctx;
678	cctx = cctx_new ();	1033
679	PL_op = PL_op->op_next;	1034	cctx_destroy (cctx);
680	}	1035	}
681		1036
682	return cctx;	1037	return cctx_new ();
683	}	1038	}
684		1039
685	static void	1040	static void
686	cctx_put (coro_cctx *cctx)	1041	cctx_put (coro_cctx *cctx)
687	{	1042	{
688	/* free another cctx if overlimit */	1043	/* free another cctx if overlimit */
689	if (cctx_idle >= MAX_IDLE_CCTX)	1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
690	{	1045	{
691	coro_cctx *first = cctx_first;	1046	coro_cctx *first = cctx_first;
692	cctx_first = first->next;	1047	cctx_first = first->next;
693	--cctx_idle;	1048	--cctx_idle;
694		1049
695	assert (!first->inuse);
696	cctx_destroy (first);	1050	cctx_destroy (first);
697	}	1051	}
698		1052
699	++cctx_idle;	1053	++cctx_idle;
700	cctx->next = cctx_first;	1054	cctx->next = cctx_first;
701	cctx_first = cctx;	1055	cctx_first = cctx;
702	}	1056	}
703		1057
704	/* never call directly, always through the coro_state_transfer global variable */	1058	/ coroutine switching ***************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro prev, struct coro next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
		1077	#else
		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
		1079	#endif
		1080	)
		1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1082	}
		1083	}
		1084
		1085	/* always use the TRANSFER macro */
705	static void NOINLINE	1086	static void NOINLINE
706	transfer (struct coro prev, struct coro next)	1087	transfer (pTHX_ struct coro prev, struct coro next)
707	{	1088	{
708	dSTACKLEVEL;	1089	dSTACKLEVEL;
709		1090
710	/* sometimes transfer is only called to set idle_sp */	1091	/* sometimes transfer is only called to set idle_sp */
711	if (!next)	1092	if (expect_false (!next))
712	{	1093	{
713	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
714	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */	1095	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
715	}	1096	}
716	else if (prev != next)	1097	else if (expect_true (prev != next))
717	{	1098	{
718	coro_cctx *prev__cctx;	1099	coro_cctx *prev__cctx;
719		1100
720	if (prev->flags & CF_NEW)	1101	if (expect_false (prev->flags & CF_NEW))
721	{	1102	{
722	/* create a new empty context */	1103	/* create a new empty context */
723	Newz (0, prev->cctx, 1, coro_cctx);	1104	Newz (0, prev->cctx, 1, coro_cctx);
724	prev->cctx->inuse = 1;
725	prev->flags &= ~CF_NEW;	1105	prev->flags &= ~CF_NEW;
726	prev->flags \|= CF_RUNNING;	1106	prev->flags \|= CF_RUNNING;
727	}	1107	}
728		1108
729	/TODO: must not croak here /
730	if (!prev->flags & CF_RUNNING)
731	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
732
733	if (next->flags & CF_RUNNING)
734	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
735
736	prev->flags &= ~CF_RUNNING;	1109	prev->flags &= ~CF_RUNNING;
737	next->flags \|= CF_RUNNING;	1110	next->flags \|= CF_RUNNING;
738		1111
739	LOCK;	1112	LOCK;
740		1113
741	if (next->flags & CF_NEW)	1114	if (expect_false (next->flags & CF_NEW))
742	{	1115	{
743	/* need to start coroutine */	1116	/* need to start coroutine */
744	next->flags &= ~CF_NEW;	1117	next->flags &= ~CF_NEW;
745	/* first get rid of the old state */	1118	/* first get rid of the old state */
746	save_perl (prev);	1119	save_perl (aTHX_ prev);
747	/* setup coroutine call */	1120	/* setup coroutine call */
748	setup_coro (next);	1121	coro_setup (aTHX_ next);
749	/* need a new stack */
750	assert (!next->cctx);
751	}	1122	}
752	else	1123	else
753	{	1124	{
754	/* coroutine already started */	1125	/* coroutine already started */
755	save_perl (prev);	1126	save_perl (aTHX_ prev);
756	load_perl (next);	1127	load_perl (aTHX_ next);
757	}	1128	}
758		1129
759	prev__cctx = prev->cctx;	1130	prev__cctx = prev->cctx;
760		1131
761	/* possibly "free" the cctx */	1132	/* possibly "free" the cctx */
762	if (prev__cctx->idle_sp == STACKLEVEL)	1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
763	{	1134	{
764	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
765	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
766		1137
767	prev->cctx = 0;	1138	prev->cctx = 0;
768		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	if (!next->cctx)
		1144	next->cctx = cctx_get (aTHX);
		1145
769	cctx_put (prev__cctx);	1146	cctx_put (prev__cctx);
770	prev__cctx->inuse = 0;
771	}	1147	}
772		1148
		1149	++next->usecount;
		1150
773	if (!next->cctx)	1151	if (expect_true (!next->cctx))
774	{
775	next->cctx = cctx_get ();	1152	next->cctx = cctx_get (aTHX);
776	assert (!next->cctx->inuse);
777	next->cctx->inuse = 1;
778	}
779		1153
780	if (prev__cctx != next->cctx)	1154	if (expect_false (prev__cctx != next->cctx))
781	{	1155	{
782	prev__cctx->top_env = PL_top_env;	1156	prev__cctx->top_env = PL_top_env;
783	PL_top_env = next->cctx->top_env;	1157	PL_top_env = next->cctx->top_env;
784	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1158	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
785	}	1159	}
786		1160
787	free_coro_mortal ();	1161	free_coro_mortal (aTHX);
788
789	UNLOCK;	1162	UNLOCK;
		1163
		1164	if (expect_false (prev->throw \|\| next->throw))
		1165	{
		1166	struct coro *coro = SvSTATE (coro_current);
		1167
		1168	if (coro->throw)
		1169	{
		1170	SV *exception = coro->throw;
		1171	coro->throw = 0;
		1172	sv_setsv (ERRSV, exception);
		1173	croak (0);
		1174	}
		1175	}
790	}	1176	}
791	}	1177	}
792		1178
793	struct transfer_args	1179	struct transfer_args
794	{	1180	{
795	struct coro prev, next;	1181	struct coro prev, next;
796	};	1182	};
797		1183
798	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1184	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1185	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
799		1186
		1187	/ high level stuff ******************************************************/
		1188
800	static void	1189	static int
801	coro_state_destroy (struct coro *coro)	1190	coro_state_destroy (pTHX_ struct coro *coro)
802	{	1191	{
803	if (coro->refcnt--)	1192	if (coro->flags & CF_DESTROYED)
804	return;	1193	return 0;
		1194
		1195	coro->flags \|= CF_DESTROYED;
		1196
		1197	if (coro->flags & CF_READY)
		1198	{
		1199	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1200	/* alternative: look through all ready queues and remove the coro */
		1201	LOCK;
		1202	--coro_nready;
		1203	UNLOCK;
		1204	}
		1205	else
		1206	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
805		1207
806	if (coro->mainstack && coro->mainstack != main_mainstack)	1208	if (coro->mainstack && coro->mainstack != main_mainstack)
807	{	1209	{
808	struct coro temp;	1210	struct coro temp;
809	Zero (&temp, 1, struct coro);
810	temp.save = CORO_SAVE_ALL;
811		1211
812	if (coro->flags & CF_RUNNING)	1212	if (coro->flags & CF_RUNNING)
813	croak ("FATAL: tried to destroy currently running coroutine");	1213	croak ("FATAL: tried to destroy currently running coroutine");
814		1214
815	save_perl (&temp);	1215	save_perl (aTHX_ &temp);
816	load_perl (coro);	1216	load_perl (aTHX_ coro);
817		1217
818	coro_destroy_stacks ();	1218	coro_destroy (aTHX_ coro);
819		1219
820	load_perl (&temp); /* this will get rid of defsv etc.. */	1220	load_perl (aTHX_ &temp);
821		1221
822	coro->mainstack = 0;	1222	coro->slot = 0;
823	}	1223	}
824		1224
825	cctx_destroy (coro->cctx);	1225	cctx_destroy (coro->cctx);
826	SvREFCNT_dec (coro->args);	1226	SvREFCNT_dec (coro->args);
827	Safefree (coro);	1227
		1228	if (coro->next) coro->next->prev = coro->prev;
		1229	if (coro->prev) coro->prev->next = coro->next;
		1230	if (coro == coro_first) coro_first = coro->next;
		1231
		1232	return 1;
828	}	1233	}
829		1234
830	static int	1235	static int
831	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1236	coro_state_free (pTHX_ SV sv, MAGIC mg)
832	{	1237	{
833	struct coro coro = (struct coro )mg->mg_ptr;	1238	struct coro coro = (struct coro )mg->mg_ptr;
834	mg->mg_ptr = 0;	1239	mg->mg_ptr = 0;
835		1240
		1241	coro->hv = 0;
		1242
		1243	if (--coro->refcnt < 0)
		1244	{
836	coro_state_destroy (coro);	1245	coro_state_destroy (aTHX_ coro);
		1246	Safefree (coro);
		1247	}
837		1248
838	return 0;	1249	return 0;
839	}	1250	}
840		1251
841	static int	1252	static int
…		…
848	return 0;	1259	return 0;
849	}	1260	}
850		1261
851	static MGVTBL coro_state_vtbl = {	1262	static MGVTBL coro_state_vtbl = {
852	0, 0, 0, 0,	1263	0, 0, 0, 0,
853	coro_state_clear,	1264	coro_state_free,
854	0,	1265	0,
855	#ifdef MGf_DUP	1266	#ifdef MGf_DUP
856	coro_state_dup,	1267	coro_state_dup,
857	#else	1268	#else
858	# define MGf_DUP 0	1269	# define MGf_DUP 0
859	#endif	1270	#endif
860	};	1271	};
861		1272
862	static struct coro *
863	SvSTATE (SV *coro)
864	{
865	HV *stash;
866	MAGIC *mg;
867
868	if (SvROK (coro))
869	coro = SvRV (coro);
870
871	stash = SvSTASH (coro);
872	if (stash != coro_stash && stash != coro_state_stash)
873	{
874	/* very slow, but rare, check */
875	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
876	croak ("Coro::State object required");
877	}
878
879	mg = SvMAGIC (coro);
880	assert (mg->mg_type == PERL_MAGIC_ext);
881	return (struct coro *)mg->mg_ptr;
882	}
883
884	static void	1273	static void
885	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)	1274	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
886	{	1275	{
887	ta->prev = SvSTATE (prev_sv);	1276	ta->prev = SvSTATE (prev_sv);
888	ta->next = SvSTATE (next_sv);	1277	ta->next = SvSTATE (next_sv);
		1278	TRANSFER_CHECK (*ta);
889	}	1279	}
890		1280
891	static void	1281	static void
892	api_transfer (SV prev_sv, SV next_sv)	1282	api_transfer (SV prev_sv, SV next_sv)
893	{	1283	{
		1284	dTHX;
894	struct transfer_args ta;	1285	struct transfer_args ta;
895		1286
896	prepare_transfer (&ta, prev_sv, next_sv);	1287	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
897	TRANSFER (ta);	1288	TRANSFER (ta);
898	}	1289	}
899		1290
900	static int
901	api_save (SV *coro_sv, int new_save)
902	{
903	struct coro *coro = SvSTATE (coro_sv);
904	int old_save = coro->save;
905
906	if (new_save >= 0)
907	coro->save = new_save;
908
909	return old_save;
910	}
911
912	/ Coro ******************************************************************/	1291	/ Coro ******************************************************************/
913		1292
914	#define PRIO_MAX 3
915	#define PRIO_HIGH 1
916	#define PRIO_NORMAL 0
917	#define PRIO_LOW -1
918	#define PRIO_IDLE -3
919	#define PRIO_MIN -4
920
921	/* for Coro.pm */
922	static SV *coro_current;
923	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
924	static int coro_nready;
925
926	static void	1293	static void
927	coro_enq (SV *coro_sv)	1294	coro_enq (pTHX_ SV *coro_sv)
928	{	1295	{
929	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1296	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
930	coro_nready++;
931	}	1297	}
932		1298
933	static SV *	1299	static SV *
934	coro_deq (int min_prio)	1300	coro_deq (pTHX_ int min_prio)
935	{	1301	{
936	int prio = PRIO_MAX - PRIO_MIN;	1302	int prio = PRIO_MAX - PRIO_MIN;
937		1303
938	min_prio -= PRIO_MIN;	1304	min_prio -= PRIO_MIN;
939	if (min_prio < 0)	1305	if (min_prio < 0)
940	min_prio = 0;	1306	min_prio = 0;
941		1307
942	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1308	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
943	if (AvFILLp (coro_ready [prio]) >= 0)	1309	if (AvFILLp (coro_ready [prio]) >= 0)
944	{
945	coro_nready--;
946	return av_shift (coro_ready [prio]);	1310	return av_shift (coro_ready [prio]);
947	}
948		1311
949	return 0;	1312	return 0;
950	}	1313	}
951		1314
952	static int	1315	static int
953	api_ready (SV *coro_sv)	1316	api_ready (SV *coro_sv)
954	{	1317	{
		1318	dTHX;
955	struct coro *coro;	1319	struct coro *coro;
956		1320
957	if (SvROK (coro_sv))	1321	if (SvROK (coro_sv))
958	coro_sv = SvRV (coro_sv);	1322	coro_sv = SvRV (coro_sv);
959		1323
…		…
963	return 0;	1327	return 0;
964		1328
965	coro->flags \|= CF_READY;	1329	coro->flags \|= CF_READY;
966		1330
967	LOCK;	1331	LOCK;
968	coro_enq (SvREFCNT_inc (coro_sv));	1332	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1333	++coro_nready;
969	UNLOCK;	1334	UNLOCK;
970		1335
971	return 1;	1336	return 1;
972	}	1337	}
973		1338
974	static int	1339	static int
975	api_is_ready (SV *coro_sv)	1340	api_is_ready (SV *coro_sv)
976	{	1341	{
		1342	dTHX;
977	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1343	return !!(SvSTATE (coro_sv)->flags & CF_READY);
978	}	1344	}
979		1345
980	static void	1346	static void
981	prepare_schedule (struct transfer_args *ta)	1347	prepare_schedule (pTHX_ struct transfer_args *ta)
982	{	1348	{
983	SV prev, next;	1349	SV prev_sv, next_sv;
984		1350
985	for (;;)	1351	for (;;)
986	{	1352	{
987	LOCK;	1353	LOCK;
988	next = coro_deq (PRIO_MIN);	1354	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1355
		1356	/* nothing to schedule: call the idle handler */
		1357	if (expect_false (!next_sv))
		1358	{
		1359	dSP;
		1360	UNLOCK;
		1361
		1362	ENTER;
		1363	SAVETMPS;
		1364
		1365	PUSHMARK (SP);
		1366	PUTBACK;
		1367	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1368
		1369	FREETMPS;
		1370	LEAVE;
		1371	continue;
		1372	}
		1373
		1374	ta->next = SvSTATE (next_sv);
		1375
		1376	/* cannot transfer to destroyed coros, skip and look for next */
		1377	if (expect_false (ta->next->flags & CF_DESTROYED))
		1378	{
		1379	UNLOCK;
		1380	SvREFCNT_dec (next_sv);
		1381	/* coro_nready is already taken care of by destroy */
		1382	continue;
		1383	}
		1384
		1385	--coro_nready;
989	UNLOCK;	1386	UNLOCK;
990
991	if (next)
992	break;	1387	break;
993
994	{
995	dSP;
996
997	ENTER;
998	SAVETMPS;
999
1000	PUSHMARK (SP);
1001	PUTBACK;
1002	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1003
1004	FREETMPS;
1005	LEAVE;
1006	}	1388	}
1007	}
1008
1009	prev = SvRV (coro_current);
1010	SvRV_set (coro_current, next);
1011		1389
1012	/* free this only after the transfer */	1390	/* free this only after the transfer */
1013	LOCK;	1391	prev_sv = SvRV (coro_current);
1014	free_coro_mortal ();
1015	UNLOCK;
1016	coro_mortal = prev;
1017
1018	assert (!SvROK(prev));//D
1019	assert (!SvROK(next));//D
1020
1021	ta->prev = SvSTATE (prev);	1392	ta->prev = SvSTATE (prev_sv);
1022	ta->next = SvSTATE (next);	1393	TRANSFER_CHECK (*ta);
1023
1024	assert (ta->next->flags & CF_READY);	1394	assert (ta->next->flags & CF_READY);
1025	ta->next->flags &= ~CF_READY;	1395	ta->next->flags &= ~CF_READY;
1026	}	1396	SvRV_set (coro_current, next_sv);
1027		1397
		1398	LOCK;
		1399	free_coro_mortal (aTHX);
		1400	coro_mortal = prev_sv;
		1401	UNLOCK;
		1402	}
		1403
1028	static void	1404	static void
1029	prepare_cede (struct transfer_args *ta)	1405	prepare_cede (pTHX_ struct transfer_args *ta)
1030	{	1406	{
1031	api_ready (coro_current);	1407	api_ready (coro_current);
1032	prepare_schedule (ta);	1408	prepare_schedule (aTHX_ ta);
1033	}	1409	}
1034		1410
1035	static int	1411	static int
1036	prepare_cede_notself (struct transfer_args *ta)	1412	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1037	{	1413	{
1038	if (coro_nready)	1414	if (coro_nready)
1039	{	1415	{
1040	SV *prev = SvRV (coro_current);	1416	SV *prev = SvRV (coro_current);
1041	prepare_schedule (ta);	1417	prepare_schedule (aTHX_ ta);
1042	api_ready (prev);	1418	api_ready (prev);
1043	return 1;	1419	return 1;
1044	}	1420	}
1045	else	1421	else
1046	return 0;	1422	return 0;
1047	}	1423	}
1048		1424
1049	static void	1425	static void
1050	api_schedule (void)	1426	api_schedule (void)
1051	{	1427	{
		1428	dTHX;
1052	struct transfer_args ta;	1429	struct transfer_args ta;
1053		1430
1054	prepare_schedule (&ta);	1431	prepare_schedule (aTHX_ &ta);
1055	TRANSFER (ta);	1432	TRANSFER (ta);
1056	}	1433	}
1057		1434
1058	static int	1435	static int
1059	api_cede (void)	1436	api_cede (void)
1060	{	1437	{
		1438	dTHX;
1061	struct transfer_args ta;	1439	struct transfer_args ta;
1062		1440
1063	prepare_cede (&ta);	1441	prepare_cede (aTHX_ &ta);
1064		1442
1065	if (ta.prev != ta.next)	1443	if (expect_true (ta.prev != ta.next))
1066	{	1444	{
1067	TRANSFER (ta);	1445	TRANSFER (ta);
1068	return 1;	1446	return 1;
1069	}	1447	}
1070	else	1448	else
…		…
1072	}	1450	}
1073		1451
1074	static int	1452	static int
1075	api_cede_notself (void)	1453	api_cede_notself (void)
1076	{	1454	{
		1455	dTHX;
1077	struct transfer_args ta;	1456	struct transfer_args ta;
1078		1457
1079	if (prepare_cede_notself (&ta))	1458	if (prepare_cede_notself (aTHX_ &ta))
1080	{	1459	{
1081	TRANSFER (ta);	1460	TRANSFER (ta);
1082	return 1;	1461	return 1;
1083	}	1462	}
1084	else	1463	else
1085	return 0;	1464	return 0;
1086	}	1465	}
1087		1466
		1467	static void
		1468	api_trace (SV *coro_sv, int flags)
		1469	{
		1470	dTHX;
		1471	struct coro *coro = SvSTATE (coro_sv);
		1472
		1473	if (flags & CC_TRACE)
		1474	{
		1475	if (!coro->cctx)
		1476	coro->cctx = cctx_new ();
		1477	else if (!(coro->cctx->flags & CC_TRACE))
		1478	croak ("cannot enable tracing on coroutine with custom stack");
		1479
		1480	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1481	}
		1482	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1483	{
		1484	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1485
		1486	if (coro->flags & CF_RUNNING)
		1487	PL_runops = RUNOPS_DEFAULT;
		1488	else
		1489	coro->slot->runops = RUNOPS_DEFAULT;
		1490	}
		1491	}
		1492
1088	MODULE = Coro::State PACKAGE = Coro::State	1493	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1089		1494
1090	PROTOTYPES: DISABLE	1495	PROTOTYPES: DISABLE
1091		1496
1092	BOOT:	1497	BOOT:
1093	{	1498	{
1094	#ifdef USE_ITHREADS	1499	#ifdef USE_ITHREADS
1095	MUTEX_INIT (&coro_mutex);	1500	MUTEX_INIT (&coro_mutex);
1096	#endif	1501	#endif
1097	BOOT_PAGESIZE;	1502	BOOT_PAGESIZE;
1098		1503
		1504	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1505	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1506
		1507	hv_sig = coro_get_hv ("SIG", TRUE);
		1508	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1509	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1510
		1511	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1512	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1513
1099	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1514	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1100		1515
		1516	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1517	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1101	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1102	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1103	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1104	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1105	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1106		1520
1107	main_mainstack = PL_mainstack;	1521	main_mainstack = PL_mainstack;
		1522	main_top_env = PL_top_env;
		1523
		1524	while (main_top_env->je_prev)
		1525	main_top_env = main_top_env->je_prev;
1108		1526
1109	coroapi.ver = CORO_API_VERSION;	1527	coroapi.ver = CORO_API_VERSION;
1110	coroapi.transfer = api_transfer;	1528	coroapi.transfer = api_transfer;
1111		1529
1112	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1530	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1119	struct coro *coro;	1537	struct coro *coro;
1120	HV *hv;	1538	HV *hv;
1121	int i;	1539	int i;
1122		1540
1123	Newz (0, coro, 1, struct coro);	1541	Newz (0, coro, 1, struct coro);
1124	coro->args = newAV ();	1542	coro->args = newAV ();
1125	coro->save = CORO_SAVE_ALL;
1126	coro->flags = CF_NEW;	1543	coro->flags = CF_NEW;
1127		1544
		1545	if (coro_first) coro_first->prev = coro;
		1546	coro->next = coro_first;
		1547	coro_first = coro;
		1548
1128	hv = newHV ();	1549	coro->hv = hv = newHV ();
1129	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1550	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1130	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1551	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1131		1552
		1553	av_extend (coro->args, items - 1);
1132	for (i = 1; i < items; i++)	1554	for (i = 1; i < items; i++)
1133	av_push (coro->args, newSVsv (ST (i)));	1555	av_push (coro->args, newSVsv (ST (i)));
1134	}	1556	}
1135	OUTPUT:	1557	OUTPUT:
1136	RETVAL	1558	RETVAL
1137		1559
1138	int	1560	# these not obviously related functions are all rolled into the same xs
1139	save (SV *coro, int new_save = -1)	1561	# function to increase chances that they all will call transfer with the same
1140	CODE:	1562	# stack offset
1141	RETVAL = api_save (coro, new_save);
1142	OUTPUT:
1143	RETVAL
1144
1145	void	1563	void
1146	_set_stacklevel (...)	1564	_set_stacklevel (...)
1147	ALIAS:	1565	ALIAS:
1148	Coro::State::transfer = 1	1566	Coro::State::transfer = 1
1149	Coro::schedule = 2	1567	Coro::schedule = 2
1150	Coro::cede = 3	1568	Coro::cede = 3
1151	Coro::cede_notself = 4	1569	Coro::cede_notself = 4
		1570	Coro::Event::next = 5
		1571	Coro::Event::next_cancel = 6
1152	CODE:	1572	PPCODE:
1153	{	1573	{
1154	struct transfer_args ta;	1574	struct transfer_args ta;
		1575	int again = 0;
1155		1576
1156	switch (ix)	1577	do
1157	{	1578	{
		1579	switch (ix)
		1580	{
1158	case 0:	1581	case 0:
1159	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1582	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1160	ta.next = 0;	1583	ta.next = 0;
1161	break;	1584	break;
1162		1585
1163	case 1:	1586	case 1:
1164	if (items != 2)	1587	if (items != 2)
1165	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1588	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1166		1589
1167	prepare_transfer (&ta, ST (0), ST (1));	1590	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1168	break;	1591	break;
1169		1592
1170	case 2:	1593	case 2:
1171	prepare_schedule (&ta);	1594	prepare_schedule (aTHX_ &ta);
1172	break;	1595	break;
1173		1596
1174	case 3:	1597	case 3:
1175	prepare_cede (&ta);	1598	prepare_cede (aTHX_ &ta);
1176	break;	1599	break;
1177		1600
1178	case 4:	1601	case 4:
1179	if (!prepare_cede_notself (&ta))	1602	if (!prepare_cede_notself (aTHX_ &ta))
1180	XSRETURN_EMPTY;	1603	XSRETURN_EMPTY;
1181		1604
1182	break;	1605	break;
		1606
		1607	case 5:
		1608	case 6:
		1609	if (items != 1)
		1610	croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
		1611
		1612	{
		1613	SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
		1614
		1615	if (ev)
		1616	{
		1617	if (GIMME_V != G_VOID)
		1618	{
		1619	XPUSHs (ev);
		1620	XSRETURN (1);
		1621	}
		1622	else
		1623	XSRETURN_EMPTY;
		1624	}
		1625	}
		1626
		1627	prepare_schedule (aTHX_ &ta);
		1628	again = 1;
		1629	break;
		1630	}
		1631
		1632	BARRIER;
		1633	TRANSFER (ta);
		1634	BARRIER;
1183	}	1635	}
		1636	while (again);
1184		1637
1185	BARRIER;	1638	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1186	TRANSFER (ta);	1639	XSRETURN_YES;
1187	}
1188		1640
1189	void	1641	XSRETURN_EMPTY; /* not understood why this is necessary, likely some stack handling bug */
1190	_clone_state_from (SV dst, SV src)	1642
		1643	bool
		1644	_destroy (SV *coro_sv)
1191	CODE:	1645	CODE:
1192	{	1646	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1193	struct coro *coro_src = SvSTATE (src);	1647	OUTPUT:
1194		1648	RETVAL
1195	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1196
1197	++coro_src->refcnt;
1198	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1199	}
1200		1649
1201	void	1650	void
1202	_exit (code)	1651	_exit (code)
1203	int code	1652	int code
1204	PROTOTYPE: $	1653	PROTOTYPE: $
1205	CODE:	1654	CODE:
1206	_exit (code);	1655	_exit (code);
1207		1656
1208	int	1657	int
		1658	cctx_stacksize (int new_stacksize = 0)
		1659	CODE:
		1660	RETVAL = coro_stacksize;
		1661	if (new_stacksize)
		1662	coro_stacksize = new_stacksize;
		1663	OUTPUT:
		1664	RETVAL
		1665
		1666	int
1209	cctx_count ()	1667	cctx_count ()
1210	CODE:	1668	CODE:
1211	RETVAL = cctx_count;	1669	RETVAL = cctx_count;
1212	OUTPUT:	1670	OUTPUT:
1213	RETVAL	1671	RETVAL
…		…
1217	CODE:	1675	CODE:
1218	RETVAL = cctx_idle;	1676	RETVAL = cctx_idle;
1219	OUTPUT:	1677	OUTPUT:
1220	RETVAL	1678	RETVAL
1221		1679
		1680	void
		1681	list ()
		1682	PPCODE:
		1683	{
		1684	struct coro *coro;
		1685	for (coro = coro_first; coro; coro = coro->next)
		1686	if (coro->hv)
		1687	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1688	}
		1689
		1690	void
		1691	call (Coro::State coro, SV *coderef)
		1692	ALIAS:
		1693	eval = 1
		1694	CODE:
		1695	{
		1696	if (coro->mainstack)
		1697	{
		1698	struct coro temp;
		1699
		1700	if (!(coro->flags & CF_RUNNING))
		1701	{
		1702	save_perl (aTHX_ &temp);
		1703	load_perl (aTHX_ coro);
		1704	}
		1705
		1706	{
		1707	dSP;
		1708	ENTER;
		1709	SAVETMPS;
		1710	PUTBACK;
		1711	PUSHSTACK;
		1712	PUSHMARK (SP);
		1713
		1714	if (ix)
		1715	eval_sv (coderef, 0);
		1716	else
		1717	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1718
		1719	POPSTACK;
		1720	FREETMPS;
		1721	LEAVE;
		1722	}
		1723
		1724	if (!(coro->flags & CF_RUNNING))
		1725	{
		1726	save_perl (aTHX_ coro);
		1727	load_perl (aTHX_ &temp);
		1728	}
		1729	}
		1730	}
		1731
		1732	SV *
		1733	is_ready (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	is_ready = CF_READY
		1737	is_running = CF_RUNNING
		1738	is_new = CF_NEW
		1739	is_destroyed = CF_DESTROYED
		1740	CODE:
		1741	RETVAL = boolSV (coro->flags & ix);
		1742	OUTPUT:
		1743	RETVAL
		1744
		1745	void
		1746	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1747
		1748	SV *
		1749	has_stack (Coro::State coro)
		1750	PROTOTYPE: $
		1751	CODE:
		1752	RETVAL = boolSV (!!coro->cctx);
		1753	OUTPUT:
		1754	RETVAL
		1755
		1756	int
		1757	is_traced (Coro::State coro)
		1758	PROTOTYPE: $
		1759	CODE:
		1760	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1761	OUTPUT:
		1762	RETVAL
		1763
		1764	IV
		1765	rss (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	usecount = 1
		1769	CODE:
		1770	switch (ix)
		1771	{
		1772	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1773	case 1: RETVAL = coro->usecount; break;
		1774	}
		1775	OUTPUT:
		1776	RETVAL
		1777
		1778
1222	MODULE = Coro::State PACKAGE = Coro	1779	MODULE = Coro::State PACKAGE = Coro
1223		1780
1224	BOOT:	1781	BOOT:
1225	{	1782	{
1226	int i;	1783	int i;
1227		1784
		1785	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1786	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1787	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1788
		1789	coro_current = coro_get_sv ("Coro::current", FALSE);
		1790	SvREADONLY_on (coro_current);
		1791
1228	coro_stash = gv_stashpv ("Coro", TRUE);	1792	coro_stash = gv_stashpv ("Coro", TRUE);
1229		1793
1230	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1794	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1231	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1795	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1232	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1796	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1233	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1797	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1234	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1798	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1235	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1799	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1236		1800
1237	coro_current = get_sv ("Coro::current", FALSE);
1238	SvREADONLY_on (coro_current);
1239
1240	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1801	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1241	coro_ready[i] = newAV ();	1802	coro_ready[i] = newAV ();
1242		1803
1243	{	1804	{
1244	SV *sv = perl_get_sv("Coro::API", 1);	1805	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1806	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1245		1807
1246	coroapi.schedule = api_schedule;	1808	coroapi.schedule = api_schedule;
1247	coroapi.save = api_save;
1248	coroapi.cede = api_cede;	1809	coroapi.cede = api_cede;
1249	coroapi.cede_notself = api_cede_notself;	1810	coroapi.cede_notself = api_cede_notself;
1250	coroapi.ready = api_ready;	1811	coroapi.ready = api_ready;
1251	coroapi.is_ready = api_is_ready;	1812	coroapi.is_ready = api_is_ready;
1252	coroapi.nready = &coro_nready;	1813	coroapi.nready = &coro_nready;
…		…
1293	CODE:	1854	CODE:
1294	RETVAL = boolSV (api_ready (self));	1855	RETVAL = boolSV (api_ready (self));
1295	OUTPUT:	1856	OUTPUT:
1296	RETVAL	1857	RETVAL
1297		1858
1298	SV *
1299	is_ready (SV *self)
1300	PROTOTYPE: $
1301	CODE:
1302	RETVAL = boolSV (api_is_ready (self));
1303	OUTPUT:
1304	RETVAL
1305
1306	int	1859	int
1307	nready (...)	1860	nready (...)
1308	PROTOTYPE:	1861	PROTOTYPE:
1309	CODE:	1862	CODE:
1310	RETVAL = coro_nready;	1863	RETVAL = coro_nready;
1311	OUTPUT:	1864	OUTPUT:
1312	RETVAL	1865	RETVAL
1313		1866
		1867	void
		1868	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1869	PROTOTYPE: $;$
		1870	CODE:
		1871	SvREFCNT_dec (self->throw);
		1872	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1873
		1874	# for async_pool speedup
		1875	void
		1876	_pool_1 (SV *cb)
		1877	CODE:
		1878	{
		1879	struct coro *coro = SvSTATE (coro_current);
		1880	HV hv = (HV )SvRV (coro_current);
		1881	AV *defav = GvAV (PL_defgv);
		1882	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1883	AV *invoke_av;
		1884	int i, len;
		1885
		1886	if (!invoke)
		1887	croak ("\3async_pool terminate\2\n");
		1888
		1889	SvREFCNT_dec (coro->saved_deffh);
		1890	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1891
		1892	hv_store (hv, "desc", sizeof ("desc") - 1,
		1893	newSVpvn (strpair ("[async_pool]")), 0);
		1894
		1895	invoke_av = (AV *)SvRV (invoke);
		1896	len = av_len (invoke_av);
		1897
		1898	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1899
		1900	if (len > 0)
		1901	{
		1902	av_fill (defav, len - 1);
		1903	for (i = 0; i < len; ++i)
		1904	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1905	}
		1906
		1907	SvREFCNT_dec (invoke);
		1908	}
		1909
		1910	void
		1911	_pool_2 (SV *cb)
		1912	CODE:
		1913	{
		1914	struct coro *coro = SvSTATE (coro_current);
		1915
		1916	sv_setsv (cb, &PL_sv_undef);
		1917
		1918	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1919	coro->saved_deffh = 0;
		1920
		1921	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1922	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1923	croak ("\3async_pool terminate\2\n");
		1924
		1925	av_clear (GvAV (PL_defgv));
		1926	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1927	newSVpvn (strpair ("[async_pool idle]")), 0);
		1928
		1929	coro->prio = 0;
		1930
		1931	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1932	api_trace (coro_current, 0);
		1933
		1934	av_push (av_async_pool, newSVsv (coro_current));
		1935	}
		1936
		1937
1314	MODULE = Coro::State PACKAGE = Coro::AIO	1938	MODULE = Coro::State PACKAGE = Coro::AIO
1315		1939
1316	SV *	1940	SV *
1317	_get_state ()	1941	_get_state ()
1318	CODE:	1942	CODE:

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Comparing Coro/Coro/State.xs (file contents): Revision 1.132 by root, Fri Dec 29 13:03:05 2006 UTC vs. Revision 1.208 by root, Wed Oct 10 00:53:18 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.132 by root, Fri Dec 29 13:03:05 2006 UTC vs.
Revision 1.208 by root, Wed Oct 10 00:53:18 2007 UTC