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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.136 by root, Fri Jan 12 01:05:55 2007 UTC vs.
Revision 1.209 by root, Wed Oct 10 02:58:17 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	#include <stdio.h>	12	#include <stdio.h>
10	#include <errno.h>	13	#include <errno.h>
11	#include <assert.h>	14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
12		16
13	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
14	# include <unistd.h>	18	# include <unistd.h>
15	# include <sys/mman.h>	19	# include <sys/mman.h>
16	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
31	#else	35	#else
32	# define PAGESIZE 0	36	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
34	#endif	38	#endif
35		39
36	#if USE_VALGRIND	40	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
38	#endif	45	#endif
39		46
40	/* the maximum number of idle cctx that will be pooled */	47	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	48	#define MAX_IDLE_CCTX 8
42		49
…		…
70	/* 5.8.7 */	77	/* 5.8.7 */
71	#ifndef SvRV_set	78	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	79	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	80	#endif
74		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
		89
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	91	# undef CORO_STACKGUARD
77	#endif	92	#endif
78		93
79	#ifndef STACKGUARD	94	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	95	# define CORO_STACKGUARD 0
81	#endif	96	#endif
82		97
83	/* prefer perl internal functions over our own? */	98	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	100	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	101	#endif
87		102
88	/* The next macro should declare a variable stacklevel that contains and approximation	103	/* 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	104	* portable way as possible. */
90	* and should be unique. */
91	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
92	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
93		107
94	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
95		109
96	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
97	# define attribute(x) __attribute__(x)	111	# define attribute(x) __attribute__(x)
98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
99	#else	114	#else
100	# define attribute(x)	115	# define attribute(x)
101	# define BARRIER	116	# define BARRIER
		117	# define expect(expr,value) (expr)
102	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
103		122
104	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
105		124
106	#include "CoroAPI.h"	125	#include "CoroAPI.h"
107		126
…		…
112	#else	131	#else
113	# define LOCK (void)0	132	# define LOCK (void)0
114	# define UNLOCK (void)0	133	# define UNLOCK (void)0
115	#endif	134	#endif
116		135
		136	#define strpair(const) const, sizeof (const) - 1
		137
117	/* helper storage struct for Coro::AIO */	138	/* helper storage struct for Coro::AIO */
118	struct io_state	139	struct io_state
119	{	140	{
120	int errorno;	141	int errorno;
121	I32 laststype;	142	I32 laststype;
122	int laststatval;	143	int laststatval;
123	Stat_t statcache;	144	Stat_t statcache;
124	};	145	};
125		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
126	static struct CoroAPI coroapi;	148	static struct CoroAPI coroapi;
127	static AV main_mainstack; / used to differentiate between $main and others */	149	static AV main_mainstack; / used to differentiate between $main and others */
		150	static JMPENV *main_top_env;
128	static HV coro_state_stash, coro_stash;	151	static HV coro_state_stash, coro_stash;
129	static SV coro_mortal; / will be freed after next transfer */	152	static SV coro_mortal; / will be freed after next transfer */
130		153
131	static struct coro_cctx *cctx_first;	154	static GV irsgv; / $/ */
		155	static GV stdoutgv; / STDOUT /
		156
		157	static HV hv_sig; / %SIG */
		158	static SV *sv_diehook;
		159	static SV *sv_warnhook;
		160
		161	/* async_pool helper stuff */
		162	static SV *sv_pool_rss;
		163	static SV *sv_pool_size;
		164	static AV *av_async_pool;
		165
		166	static struct coro_cctx cctx_first[3]; / index by GIMME_V type, void, scalar, array */
132	static int cctx_count, cctx_idle;	167	static int cctx_count, cctx_idle[3];
		168
		169	enum {
		170	CC_MAPPED = 0x01,
		171	CC_NOREUSE = 0x02, /* throw this away after tracing */
		172	CC_TRACE = 0x04,
		173	CC_TRACE_SUB = 0x08, /* trace sub calls */
		174	CC_TRACE_LINE = 0x10, /* trace each statement */
		175	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		176	};
133		177
134	/* this is a structure representing a c-level coroutine */	178	/* this is a structure representing a c-level coroutine */
135	typedef struct coro_cctx {	179	typedef struct coro_cctx {
136	struct coro_cctx *next;	180	struct coro_cctx *next;
137		181
138	/* the stack */	182	/* the stack */
139	void *sptr;	183	void *sptr;
140	long ssize; /* positive == mmap, otherwise malloc */	184	size_t ssize;
141		185
142	/* cpu state */	186	/* cpu state */
143	void idle_sp; / sp of top-level transfer/schedule/cede call */	187	void idle_sp; / sp of top-level transfer/schedule/cede call */
144	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */	188	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
145	JMPENV *top_env;	189	JMPENV *top_env;
146	coro_context cctx;	190	coro_context cctx;
147		191
148	int inuse;
149
150	#if USE_VALGRIND	192	#if CORO_USE_VALGRIND
151	int valgrind_id;	193	int valgrind_id;
152	#endif	194	#endif
		195	unsigned char flags;
153	} coro_cctx;	196	} coro_cctx;
154		197
155	enum {	198	enum {
156	CF_RUNNING = 0x0001, /* coroutine is running */	199	CF_RUNNING = 0x0001, /* coroutine is running */
157	CF_READY = 0x0002, /* coroutine is ready */	200	CF_READY = 0x0002, /* coroutine is ready */
158	CF_NEW = 0x0004, /* has never been switched to */	201	CF_NEW = 0x0004, /* has never been switched to */
159	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160	};	203	};
161		204
		205	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		206	typedef struct {
		207	SV *defsv;
		208	AV *defav;
		209	SV *errsv;
		210	SV *irsgv;
		211	#define VAR(name,type) type name;
		212	# include "state.h"
		213	#undef VAR
		214	} perl_slots;
		215
		216	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		217
162	/* this is a structure representing a perl-level coroutine */	218	/* this is a structure representing a perl-level coroutine */
163	struct coro {	219	struct coro {
164	/* the c coroutine allocated to this perl coroutine, if any */	220	/* the c coroutine allocated to this perl coroutine, if any */
165	coro_cctx *cctx;	221	coro_cctx *cctx;
		222	int gimme;
166		223
		224	/* process data */
		225	AV *mainstack;
		226	perl_slots slot; / basically the saved sp */
		227
167	/* data associated with this coroutine (initial args) */	228	AV args; / data associated with this coroutine (initial args) */
168	AV *args;	229	int refcnt; /* coroutines are refcounted, yes */
169	int refcnt;
170	int save; /* CORO_SAVE flags */
171	int flags; /* CF_ flags */	230	int flags; /* CF_ flags */
		231	HV hv; / the perl hash associated with this coro, if any */
172		232
173	/* optionally saved, might be zero */	233	/* statistics */
174	AV defav; / @_ */	234	int usecount; /* number of transfers to this coro */
175	SV defsv; / $_ */
176	SV errsv; / $@ */
177	SV irssv; / $/ */
178	SV irssv_sv; / real $/ cache */
179
180	#define VAR(name,type) type name;
181	# include "state.h"
182	#undef VAR
183		235
184	/* coro process data */	236	/* coro process data */
185	int prio;	237	int prio;
		238	SV throw; / exception to be thrown */
		239
		240	/* async_pool */
		241	SV *saved_deffh;
		242
		243	/* linked list */
		244	struct coro next, prev;
186	};	245	};
187		246
188	typedef struct coro *Coro__State;	247	typedef struct coro *Coro__State;
189	typedef struct coro *Coro__State_or_hashref;	248	typedef struct coro *Coro__State_or_hashref;
190		249
		250	/ Coro ******************************************************************/
		251
		252	#define PRIO_MAX 3
		253	#define PRIO_HIGH 1
		254	#define PRIO_NORMAL 0
		255	#define PRIO_LOW -1
		256	#define PRIO_IDLE -3
		257	#define PRIO_MIN -4
		258
		259	/* for Coro.pm */
		260	static SV *coro_current;
		261	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		262	static int coro_nready;
		263	static struct coro *coro_first;
		264
		265	/ lowlevel stuff ********************************************************/
		266
		267	static SV *
		268	coro_get_sv (const char *name, int create)
		269	{
		270	#if PERL_VERSION_ATLEAST (5,9,0)
		271	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		272	get_sv (name, create);
		273	#endif
		274	return get_sv (name, create);
		275	}
		276
191	static AV *	277	static AV *
		278	coro_get_av (const char *name, int create)
		279	{
		280	#if PERL_VERSION_ATLEAST (5,9,0)
		281	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		282	get_av (name, create);
		283	#endif
		284	return get_av (name, create);
		285	}
		286
		287	static HV *
		288	coro_get_hv (const char *name, int create)
		289	{
		290	#if PERL_VERSION_ATLEAST (5,9,0)
		291	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		292	get_hv (name, create);
		293	#endif
		294	return get_hv (name, create);
		295	}
		296
		297	static AV *
192	coro_clone_padlist (CV *cv)	298	coro_clone_padlist (pTHX_ CV *cv)
193	{	299	{
194	AV *padlist = CvPADLIST (cv);	300	AV *padlist = CvPADLIST (cv);
195	AV newpadlist, newpad;	301	AV newpadlist, newpad;
196		302
197	newpadlist = newAV ();	303	newpadlist = newAV ();
…		…
209		315
210	return newpadlist;	316	return newpadlist;
211	}	317	}
212		318
213	static void	319	static void
214	free_padlist (AV *padlist)	320	free_padlist (pTHX_ AV *padlist)
215	{	321	{
216	/* may be during global destruction */	322	/* may be during global destruction */
217	if (SvREFCNT (padlist))	323	if (SvREFCNT (padlist))
218	{	324	{
219	I32 i = AvFILLp (padlist);	325	I32 i = AvFILLp (padlist);
…		…
240	AV *padlist;	346	AV *padlist;
241	AV av = (AV )mg->mg_obj;	347	AV av = (AV )mg->mg_obj;
242		348
243	/* casting is fun. */	349	/* casting is fun. */
244	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	350	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
245	free_padlist (padlist);	351	free_padlist (aTHX_ padlist);
246		352
247	SvREFCNT_dec (av);	353	SvREFCNT_dec (av);
248		354
249	return 0;	355	return 0;
250	}	356	}
…		…
258	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	364	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
259	? SvMAGIC (cv) \	365	? SvMAGIC (cv) \
260	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	366	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
261	: 0	367	: 0
262		368
		369	static struct coro *
		370	SvSTATE_ (pTHX_ SV *coro)
		371	{
		372	HV *stash;
		373	MAGIC *mg;
		374
		375	if (SvROK (coro))
		376	coro = SvRV (coro);
		377
		378	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		379	croak ("Coro::State object required");
		380
		381	stash = SvSTASH (coro);
		382	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		383	{
		384	/* very slow, but rare, check */
		385	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		386	croak ("Coro::State object required");
		387	}
		388
		389	mg = CORO_MAGIC (coro);
		390	return (struct coro *)mg->mg_ptr;
		391	}
		392
		393	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		394
263	/* the next two functions merely cache the padlists */	395	/* the next two functions merely cache the padlists */
264	static void	396	static void
265	get_padlist (CV *cv)	397	get_padlist (pTHX_ CV *cv)
266	{	398	{
267	MAGIC *mg = CORO_MAGIC (cv);	399	MAGIC *mg = CORO_MAGIC (cv);
268	AV *av;	400	AV *av;
269		401
270	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	402	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
271	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	403	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
272	else	404	else
273	{	405	{
274	#if PREFER_PERL_FUNCTIONS	406	#if CORO_PREFER_PERL_FUNCTIONS
275	/* this is probably cleaner, but also slower? */	407	/* this is probably cleaner, but also slower? */
276	CV *cp = Perl_cv_clone (cv);	408	CV *cp = Perl_cv_clone (cv);
277	CvPADLIST (cv) = CvPADLIST (cp);	409	CvPADLIST (cv) = CvPADLIST (cp);
278	CvPADLIST (cp) = 0;	410	CvPADLIST (cp) = 0;
279	SvREFCNT_dec (cp);	411	SvREFCNT_dec (cp);
280	#else	412	#else
281	CvPADLIST (cv) = coro_clone_padlist (cv);	413	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
282	#endif	414	#endif
283	}	415	}
284	}	416	}
285		417
286	static void	418	static void
287	put_padlist (CV *cv)	419	put_padlist (pTHX_ CV *cv)
288	{	420	{
289	MAGIC *mg = CORO_MAGIC (cv);	421	MAGIC *mg = CORO_MAGIC (cv);
290	AV *av;	422	AV *av;
291		423
292	if (!mg)	424	if (expect_false (!mg))
293	{	425	{
294	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	426	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
295	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
296	mg->mg_virtual = &vtbl_coro;	428	mg->mg_virtual = &vtbl_coro;
297	mg->mg_obj = (SV *)newAV ();	429	mg->mg_obj = (SV *)newAV ();
298	}	430	}
299		431
300	av = (AV *)mg->mg_obj;	432	av = (AV *)mg->mg_obj;
301		433
302	if (AvFILLp (av) >= AvMAX (av))	434	if (expect_false (AvFILLp (av) >= AvMAX (av)))
303	av_extend (av, AvMAX (av) + 1);	435	av_extend (av, AvMAX (av) + 1);
304		436
305	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	437	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
306	}	438	}
307		439
308	#define SB do {	440	/ load & save, init *****************************************************/
309	#define SE } while (0)
310
311	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
312		441
313	static void	442	static void
314	load_perl (Coro__State c)	443	load_perl (pTHX_ Coro__State c)
315	{	444	{
		445	perl_slots *slot = c->slot;
		446	c->slot = 0;
		447
		448	PL_mainstack = c->mainstack;
		449
		450	GvSV (PL_defgv) = slot->defsv;
		451	GvAV (PL_defgv) = slot->defav;
		452	GvSV (PL_errgv) = slot->errsv;
		453	GvSV (irsgv) = slot->irsgv;
		454
316	#define VAR(name,type) PL_ ## name = c->name;	455	#define VAR(name,type) PL_ ## name = slot->name;
317	# include "state.h"	456	# include "state.h"
318	#undef VAR	457	#undef VAR
319		458
320	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	459	/hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);/
321	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	460	/hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);/
322	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
323	if (c->irssv)
324	{
325	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
326	SvREFCNT_dec (c->irssv);
327	else
328	{
329	REPLACE_SV (PL_rs, c->irssv);
330	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
331	sv_setsv (c->irssv_sv, PL_rs);
332	}
333	}
334		461
335	{	462	{
336	dSP;	463	dSP;
		464
337	CV *cv;	465	CV *cv;
338		466
339	/* now do the ugly restore mess */	467	/* now do the ugly restore mess */
340	while ((cv = (CV *)POPs))	468	while (expect_true (cv = (CV *)POPs))
341	{	469	{
342	put_padlist (cv); /* mark this padlist as available */	470	put_padlist (aTHX_ cv); /* mark this padlist as available */
343	CvDEPTH (cv) = PTR2IV (POPs);	471	CvDEPTH (cv) = PTR2IV (POPs);
344	CvPADLIST (cv) = (AV *)POPs;	472	CvPADLIST (cv) = (AV *)POPs;
345	}	473	}
346		474
347	PUTBACK;	475	PUTBACK;
348	}	476	}
349	}	477	}
350		478
351	static void	479	static void
352	save_perl (Coro__State c)	480	save_perl (pTHX_ Coro__State c)
353	{	481	{
354	{	482	{
355	dSP;	483	dSP;
356	I32 cxix = cxstack_ix;	484	I32 cxix = cxstack_ix;
357	PERL_CONTEXT *ccstk = cxstack;	485	PERL_CONTEXT *ccstk = cxstack;
…		…
360	/*	488	/*
361	* the worst thing you can imagine happens first - we have to save	489	* the worst thing you can imagine happens first - we have to save
362	* (and reinitialize) all cv's in the whole callchain :(	490	* (and reinitialize) all cv's in the whole callchain :(
363	*/	491	*/
364		492
365	EXTEND (SP, 3 + 1);
366	PUSHs (Nullsv);	493	XPUSHs (Nullsv);
367	/* this loop was inspired by pp_caller */	494	/* this loop was inspired by pp_caller */
368	for (;;)	495	for (;;)
369	{	496	{
370	while (cxix >= 0)	497	while (expect_true (cxix >= 0))
371	{	498	{
372	PERL_CONTEXT *cx = &ccstk[cxix--];	499	PERL_CONTEXT *cx = &ccstk[cxix--];
373		500
374	if (CxTYPE (cx) == CXt_SUB)	501	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
375	{	502	{
376	CV *cv = cx->blk_sub.cv;	503	CV *cv = cx->blk_sub.cv;
377		504
378	if (CvDEPTH (cv))	505	if (expect_true (CvDEPTH (cv)))
379	{	506	{
380	EXTEND (SP, 3);	507	EXTEND (SP, 3);
381	PUSHs ((SV *)CvPADLIST (cv));	508	PUSHs ((SV *)CvPADLIST (cv));
382	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	509	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
383	PUSHs ((SV *)cv);	510	PUSHs ((SV *)cv);
384		511
385	CvDEPTH (cv) = 0;	512	CvDEPTH (cv) = 0;
386	get_padlist (cv);	513	get_padlist (aTHX_ cv);
387	}	514	}
388	}	515	}
389	}	516	}
390		517
391	if (top_si->si_type == PERLSI_MAIN)	518	if (expect_true (top_si->si_type == PERLSI_MAIN))
392	break;	519	break;
393		520
394	top_si = top_si->si_prev;	521	top_si = top_si->si_prev;
395	ccstk = top_si->si_cxstack;	522	ccstk = top_si->si_cxstack;
396	cxix = top_si->si_cxix;	523	cxix = top_si->si_cxix;
397	}	524	}
398		525
399	PUTBACK;	526	PUTBACK;
400	}	527	}
401		528
402	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	529	/* allocate some space on the context stack for our purposes */
403	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	530	/* we manually unroll here, as usually 2 slots is enough */
404	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	531	if (SLOT_COUNT >= 1) CXINC;
405	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	532	if (SLOT_COUNT >= 2) CXINC;
		533	if (SLOT_COUNT >= 3) CXINC;
		534	{
		535	int i;
		536	for (i = 3; i < SLOT_COUNT; ++i)
		537	CXINC;
		538	}
		539	cxstack_ix -= SLOT_COUNT; /* undo allocation */
406		540
		541	c->mainstack = PL_mainstack;
		542
		543	{
		544	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		545
		546	slot->defav = GvAV (PL_defgv);
		547	slot->defsv = DEFSV;
		548	slot->errsv = ERRSV;
		549	slot->irsgv = GvSV (irsgv);
		550
407	#define VAR(name,type)c->name = PL_ ## name;	551	#define VAR(name,type) slot->name = PL_ ## name;
408	# include "state.h"	552	# include "state.h"
409	#undef VAR	553	#undef VAR
		554	}
410	}	555	}
411		556
412	/*	557	/*
413	* allocate various perl stacks. This is an exact copy	558	* allocate various perl stacks. This is an exact copy
414	* of perl.c:init_stacks, except that it uses less memory	559	* of perl.c:init_stacks, except that it uses less memory
415	* on the (sometimes correct) assumption that coroutines do	560	* on the (sometimes correct) assumption that coroutines do
416	* not usually need a lot of stackspace.	561	* not usually need a lot of stackspace.
417	*/	562	*/
418	#if PREFER_PERL_FUNCTIONS	563	#if CORO_PREFER_PERL_FUNCTIONS
419	# define coro_init_stacks init_stacks	564	# define coro_init_stacks init_stacks
420	#else	565	#else
421	static void	566	static void
422	coro_init_stacks ()	567	coro_init_stacks (pTHX)
423	{	568	{
424	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	569	PL_curstackinfo = new_stackinfo(32, 8);
425	PL_curstackinfo->si_type = PERLSI_MAIN;	570	PL_curstackinfo->si_type = PERLSI_MAIN;
426	PL_curstack = PL_curstackinfo->si_stack;	571	PL_curstack = PL_curstackinfo->si_stack;
427	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	572	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
428		573
429	PL_stack_base = AvARRAY(PL_curstack);	574	PL_stack_base = AvARRAY(PL_curstack);
430	PL_stack_sp = PL_stack_base;	575	PL_stack_sp = PL_stack_base;
431	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	576	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
432		577
433	New(50,PL_tmps_stack,128,SV*);	578	New(50,PL_tmps_stack,32,SV*);
434	PL_tmps_floor = -1;	579	PL_tmps_floor = -1;
435	PL_tmps_ix = -1;	580	PL_tmps_ix = -1;
436	PL_tmps_max = 128;	581	PL_tmps_max = 32;
437		582
438	New(54,PL_markstack,32,I32);	583	New(54,PL_markstack,16,I32);
439	PL_markstack_ptr = PL_markstack;	584	PL_markstack_ptr = PL_markstack;
440	PL_markstack_max = PL_markstack + 32;	585	PL_markstack_max = PL_markstack + 16;
441		586
442	#ifdef SET_MARK_OFFSET	587	#ifdef SET_MARK_OFFSET
443	SET_MARK_OFFSET;	588	SET_MARK_OFFSET;
444	#endif	589	#endif
445		590
446	New(54,PL_scopestack,32,I32);	591	New(54,PL_scopestack,8,I32);
447	PL_scopestack_ix = 0;	592	PL_scopestack_ix = 0;
448	PL_scopestack_max = 32;	593	PL_scopestack_max = 8;
449		594
450	New(54,PL_savestack,64,ANY);	595	New(54,PL_savestack,24,ANY);
451	PL_savestack_ix = 0;	596	PL_savestack_ix = 0;
452	PL_savestack_max = 64;	597	PL_savestack_max = 24;
453		598
454	#if !PERL_VERSION_ATLEAST (5,9,0)	599	#if !PERL_VERSION_ATLEAST (5,9,0)
455	New(54,PL_retstack,16,OP*);	600	New(54,PL_retstack,4,OP*);
456	PL_retstack_ix = 0;	601	PL_retstack_ix = 0;
457	PL_retstack_max = 16;	602	PL_retstack_max = 4;
458	#endif	603	#endif
459	}	604	}
460	#endif	605	#endif
461		606
462	/*	607	/*
463	* destroy the stacks, the callchain etc...	608	* destroy the stacks, the callchain etc...
464	*/	609	*/
465	static void	610	static void
466	coro_destroy_stacks ()	611	coro_destroy_stacks (pTHX)
467	{	612	{
468	if (!IN_DESTRUCT)
469	{
470	/* restore all saved variables and stuff */
471	LEAVE_SCOPE (0);
472	assert (PL_tmps_floor == -1);
473
474	/* free all temporaries */
475	FREETMPS;
476	assert (PL_tmps_ix == -1);
477
478	/* unwind all extra stacks */
479	POPSTACK_TO (PL_mainstack);
480
481	/* unwind main stack */
482	dounwind (-1);
483	}
484
485	while (PL_curstackinfo->si_next)	613	while (PL_curstackinfo->si_next)
486	PL_curstackinfo = PL_curstackinfo->si_next;	614	PL_curstackinfo = PL_curstackinfo->si_next;
487		615
488	while (PL_curstackinfo)	616	while (PL_curstackinfo)
489	{	617	{
…		…
504	#if !PERL_VERSION_ATLEAST (5,9,0)	632	#if !PERL_VERSION_ATLEAST (5,9,0)
505	Safefree (PL_retstack);	633	Safefree (PL_retstack);
506	#endif	634	#endif
507	}	635	}
508		636
		637	static size_t
		638	coro_rss (pTHX_ struct coro *coro)
		639	{
		640	size_t rss = sizeof (*coro);
		641
		642	if (coro->mainstack)
		643	{
		644	perl_slots tmp_slot;
		645	perl_slots *slot;
		646
		647	if (coro->flags & CF_RUNNING)
		648	{
		649	slot = &tmp_slot;
		650
		651	#define VAR(name,type) slot->name = PL_ ## name;
		652	# include "state.h"
		653	#undef VAR
		654	}
		655	else
		656	slot = coro->slot;
		657
		658	rss += sizeof (slot->curstackinfo);
		659	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		660	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		661	rss += slot->tmps_max * sizeof (SV *);
		662	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		663	rss += slot->scopestack_max * sizeof (I32);
		664	rss += slot->savestack_max * sizeof (ANY);
		665
		666	#if !PERL_VERSION_ATLEAST (5,9,0)
		667	rss += slot->retstack_max * sizeof (OP *);
		668	#endif
		669	}
		670
		671	return rss;
		672	}
		673
		674	/ coroutine stack handling **********************************************/
		675
509	static void	676	static void
510	setup_coro (struct coro *coro)	677	coro_setup (pTHX_ struct coro *coro)
511	{	678	{
512	/*	679	/*
513	* emulate part of the perl startup here.	680	* emulate part of the perl startup here.
514	*/	681	*/
515
516	coro_init_stacks ();	682	coro_init_stacks (aTHX);
517		683
		684	PL_runops = RUNOPS_DEFAULT;
518	PL_curcop = &PL_compiling;	685	PL_curcop = &PL_compiling;
519	PL_in_eval = EVAL_NULL;	686	PL_in_eval = EVAL_NULL;
		687	PL_comppad = 0;
520	PL_curpm = 0;	688	PL_curpm = 0;
		689	PL_curpad = 0;
521	PL_localizing = 0;	690	PL_localizing = 0;
522	PL_dirty = 0;	691	PL_dirty = 0;
523	PL_restartop = 0;	692	PL_restartop = 0;
		693	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		694	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		695
		696	GvSV (PL_defgv) = newSV (0);
		697	GvAV (PL_defgv) = coro->args; coro->args = 0;
		698	GvSV (PL_errgv) = newSV (0);
		699	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		700	PL_rs = newSVsv (GvSV (irsgv));
		701	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
524		702
525	{	703	{
526	dSP;	704	dSP;
527	LOGOP myop;	705	LOGOP myop;
528		706
529	SvREFCNT_dec (GvAV (PL_defgv));
530	GvAV (PL_defgv) = coro->args; coro->args = 0;
531
532	Zero (&myop, 1, LOGOP);	707	Zero (&myop, 1, LOGOP);
533	myop.op_next = Nullop;	708	myop.op_next = Nullop;
534	myop.op_flags = OPf_WANT_VOID;	709	myop.op_flags = OPf_WANT_VOID;
535		710
536	PUSHMARK (SP);	711	PUSHMARK (SP);
537	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	712	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
538	PUTBACK;	713	PUTBACK;
539	PL_op = (OP *)&myop;	714	PL_op = (OP *)&myop;
540	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	715	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
541	SPAGAIN;	716	SPAGAIN;
		717
		718	/*
		719	* now its very tricky. the "tail" of the next transfer might end up
		720	* either in a new cctx, or an existing one.
		721	* in case of an existing one we have to take care of whatever
		722	* entersub and transfer do to the perl stack.
		723	*/
		724	ENTER;
		725	EXTEND (SP, 4);
		726	PUSHs ((SV )0); / items */
		727	PUSHs ((SV )0); / ix, set_stacklevel */
		728	PUSHs ((SV )(sp - PL_stack_base + 1)); / ax */
		729	PUSHs ((SV )0); / again */
		730	PUTBACK;
542	}	731	}
543
544	ENTER; /* necessary e.g. for dounwind */
545	}	732	}
546		733
547	static void	734	static void
		735	coro_destroy (pTHX_ struct coro *coro)
		736	{
		737	if (!IN_DESTRUCT)
		738	{
		739	/* restore all saved variables and stuff */
		740	LEAVE_SCOPE (0);
		741	assert (PL_tmps_floor == -1);
		742
		743	/* free all temporaries */
		744	FREETMPS;
		745	assert (PL_tmps_ix == -1);
		746
		747	/* unwind all extra stacks */
		748	POPSTACK_TO (PL_mainstack);
		749
		750	/* unwind main stack */
		751	dounwind (-1);
		752	}
		753
		754	SvREFCNT_dec (GvSV (PL_defgv));
		755	SvREFCNT_dec (GvAV (PL_defgv));
		756	SvREFCNT_dec (GvSV (PL_errgv));
		757	SvREFCNT_dec (PL_defoutgv);
		758	SvREFCNT_dec (PL_rs);
		759	SvREFCNT_dec (GvSV (irsgv));
		760
		761	SvREFCNT_dec (PL_diehook);
		762	SvREFCNT_dec (PL_warnhook);
		763
		764	SvREFCNT_dec (coro->saved_deffh);
		765	SvREFCNT_dec (coro->throw);
		766
		767	coro_destroy_stacks (aTHX);
		768	}
		769
		770	static void
548	free_coro_mortal ()	771	free_coro_mortal (pTHX)
549	{	772	{
550	if (coro_mortal)	773	if (expect_true (coro_mortal))
551	{	774	{
552	SvREFCNT_dec (coro_mortal);	775	SvREFCNT_dec (coro_mortal);
553	coro_mortal = 0;	776	coro_mortal = 0;
554	}	777	}
555	}	778	}
556		779
		780	static int
		781	runops_trace (pTHX)
		782	{
		783	COP *oldcop = 0;
		784	int oldcxix = -2;
		785	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		786	coro_cctx *cctx = coro->cctx;
		787
		788	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		789	{
		790	PERL_ASYNC_CHECK ();
		791
		792	if (cctx->flags & CC_TRACE_ALL)
		793	{
		794	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		795	{
		796	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		797	SV bot, top;
		798	AV av = newAV (); / return values */
		799	SV **cb;
		800	dSP;
		801
		802	GV *gv = CvGV (cx->blk_sub.cv);
		803	SV *fullname = sv_2mortal (newSV (0));
		804	if (isGV (gv))
		805	gv_efullname3 (fullname, gv, 0);
		806
		807	bot = PL_stack_base + cx->blk_oldsp + 1;
		808	top = cx->blk_gimme == G_ARRAY ? SP + 1
		809	: cx->blk_gimme == G_SCALAR ? bot + 1
		810	: bot;
		811
		812	av_extend (av, top - bot);
		813	while (bot < top)
		814	av_push (av, SvREFCNT_inc (*bot++));
		815
		816	PL_runops = RUNOPS_DEFAULT;
		817	ENTER;
		818	SAVETMPS;
		819	EXTEND (SP, 3);
		820	PUSHMARK (SP);
		821	PUSHs (&PL_sv_no);
		822	PUSHs (fullname);
		823	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		824	PUTBACK;
		825	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		826	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		827	SPAGAIN;
		828	FREETMPS;
		829	LEAVE;
		830	PL_runops = runops_trace;
		831	}
		832
		833	if (oldcop != PL_curcop)
		834	{
		835	oldcop = PL_curcop;
		836
		837	if (PL_curcop != &PL_compiling)
		838	{
		839	SV **cb;
		840
		841	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		842	{
		843	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		844
		845	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		846	{
		847	runops_proc_t old_runops = PL_runops;
		848	dSP;
		849	GV *gv = CvGV (cx->blk_sub.cv);
		850	SV *fullname = sv_2mortal (newSV (0));
		851
		852	if (isGV (gv))
		853	gv_efullname3 (fullname, gv, 0);
		854
		855	PL_runops = RUNOPS_DEFAULT;
		856	ENTER;
		857	SAVETMPS;
		858	EXTEND (SP, 3);
		859	PUSHMARK (SP);
		860	PUSHs (&PL_sv_yes);
		861	PUSHs (fullname);
		862	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		863	PUTBACK;
		864	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		865	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		866	SPAGAIN;
		867	FREETMPS;
		868	LEAVE;
		869	PL_runops = runops_trace;
		870	}
		871
		872	oldcxix = cxstack_ix;
		873	}
		874
		875	if (cctx->flags & CC_TRACE_LINE)
		876	{
		877	dSP;
		878
		879	PL_runops = RUNOPS_DEFAULT;
		880	ENTER;
		881	SAVETMPS;
		882	EXTEND (SP, 3);
		883	PL_runops = RUNOPS_DEFAULT;
		884	PUSHMARK (SP);
		885	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		886	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		887	PUTBACK;
		888	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		889	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		890	SPAGAIN;
		891	FREETMPS;
		892	LEAVE;
		893	PL_runops = runops_trace;
		894	}
		895	}
		896	}
		897	}
		898	}
		899
		900	TAINT_NOT;
		901	return 0;
		902	}
		903
557	/* inject a fake call to Coro::State::_cctx_init into the execution */	904	/* inject a fake call to Coro::State::_cctx_init into the execution */
		905	/* _cctx_init should be careful, as it could be called at almost any time */
		906	/* during execution of a perl program */
558	static void NOINLINE	907	static void NOINLINE
559	prepare_cctx (coro_cctx *cctx)	908	cctx_prepare (pTHX_ coro_cctx *cctx)
560	{	909	{
561	dSP;	910	dSP;
562	LOGOP myop;	911	LOGOP myop;
		912
		913	PL_top_env = &PL_start_env;
		914
		915	if (cctx->flags & CC_TRACE)
		916	PL_runops = runops_trace;
563		917
564	Zero (&myop, 1, LOGOP);	918	Zero (&myop, 1, LOGOP);
565	myop.op_next = PL_op;	919	myop.op_next = PL_op;
566	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	920	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
567		921
…		…
573	PL_op = (OP *)&myop;	927	PL_op = (OP *)&myop;
574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	928	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575	SPAGAIN;	929	SPAGAIN;
576	}	930	}
577		931
		932	/*
		933	* this is a _very_ stripped down perl interpreter ;)
		934	*/
578	static void	935	static void
579	coro_run (void *arg)	936	cctx_run (void *arg)
580	{	937	{
		938	dTHX;
		939
581	/* coro_run is the alternative tail of transfer(), so unlock here. */	940	/* cctx_run is the alternative tail of transfer(), so unlock here. */
582	UNLOCK;	941	UNLOCK;
583		942
584	/*	943	/* we now skip the entersub that lead to transfer() */
585	* this is a _very_ stripped down perl interpreter ;)	944	PL_op = PL_op->op_next;
586	*/
587	PL_top_env = &PL_start_env;
588		945
589	/* inject call to cctx_init */	946	/* inject a fake subroutine call to cctx_init */
590	prepare_cctx ((coro_cctx *)arg);	947	cctx_prepare (aTHX_ (coro_cctx *)arg);
591		948
592	/* somebody will hit me for both perl_run and PL_restartop */	949	/* somebody or something will hit me for both perl_run and PL_restartop */
593	PL_restartop = PL_op;	950	PL_restartop = PL_op;
594	perl_run (PL_curinterp);	951	perl_run (PL_curinterp);
595		952
596	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	953	/*
597	abort ();	954	* If perl-run returns we assume exit() was being called or the coro
		955	* fell off the end, which seems to be the only valid (non-bug)
		956	* reason for perl_run to return. We try to exit by jumping to the
		957	* bootstrap-time "top" top_env, as we cannot restore the "main"
		958	* coroutine as Coro has no such concept
		959	*/
		960	PL_top_env = main_top_env;
		961	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
598	}	962	}
599		963
600	static coro_cctx *	964	static coro_cctx *
601	cctx_new ()	965	cctx_new ()
602	{	966	{
603	coro_cctx *cctx;	967	coro_cctx *cctx;
		968	void *stack_start;
		969	size_t stack_size;
604		970
605	++cctx_count;	971	++cctx_count;
606		972
607	Newz (0, cctx, 1, coro_cctx);	973	Newz (0, cctx, 1, coro_cctx);
608		974
609	#if HAVE_MMAP	975	#if HAVE_MMAP
610
611	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	976	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
612	/* mmap supposedly does allocate-on-write for us */	977	/* mmap supposedly does allocate-on-write for us */
613	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	978	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
614		979
615	if (cctx->sptr == (void *)-1)	980	if (cctx->sptr != (void *)-1)
616	{
617	perror ("FATAL: unable to mmap stack for coroutine");
618	_exit (EXIT_FAILURE);
619	}	981	{
620
621	# if STACKGUARD	982	# if CORO_STACKGUARD
622	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	983	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
623	# endif	984	# endif
		985	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		986	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		987	cctx->flags \|= CC_MAPPED;
		988	}
		989	else
		990	#endif
		991	{
		992	cctx->ssize = coro_stacksize * (long)sizeof (long);
		993	New (0, cctx->sptr, coro_stacksize, long);
624		994
625	#else
626
627	cctx->ssize = STACKSIZE * (long)sizeof (long);
628	New (0, cctx->sptr, STACKSIZE, long);
629
630	if (!cctx->sptr)	995	if (!cctx->sptr)
631	{	996	{
632	perror ("FATAL: unable to malloc stack for coroutine");	997	perror ("FATAL: unable to allocate stack for coroutine");
633	_exit (EXIT_FAILURE);	998	_exit (EXIT_FAILURE);
634	}	999	}
635		1000
636	#endif	1001	stack_start = cctx->sptr;
		1002	stack_size = cctx->ssize;
		1003	}
637		1004
638	#if USE_VALGRIND	1005	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
639	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1006	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
640	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
641	cctx->ssize + (char *)cctx->sptr
642	);
643	#endif
644
645	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
646		1007
647	return cctx;	1008	return cctx;
648	}	1009	}
649		1010
650	static void	1011	static void
…		…
653	if (!cctx)	1014	if (!cctx)
654	return;	1015	return;
655		1016
656	--cctx_count;	1017	--cctx_count;
657		1018
658	#if USE_VALGRIND	1019	#if CORO_USE_VALGRIND
659	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1020	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
660	#endif	1021	#endif
661		1022
662	#if HAVE_MMAP	1023	#if HAVE_MMAP
		1024	if (cctx->flags & CC_MAPPED)
663	munmap (cctx->sptr, cctx->ssize);	1025	munmap (cctx->sptr, cctx->ssize);
		1026	else
		1027	#endif
		1028	Safefree (cctx->sptr);
		1029
		1030	Safefree (cctx);
		1031	}
		1032
		1033	/* wether this cctx should be destructed */
		1034	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1035
		1036	static coro_cctx *
		1037	cctx_get (pTHX_ int gimme)
		1038	{
		1039	while (expect_true (cctx_first[gimme]))
		1040	{
		1041	coro_cctx *cctx = cctx_first[gimme];
		1042	cctx_first[gimme] = cctx->next;
		1043	--cctx_idle[gimme];
		1044
		1045	if (expect_true (!CCTX_EXPIRED (cctx)))
		1046	return cctx;
		1047
		1048	cctx_destroy (cctx);
		1049	}
		1050
		1051	assert (!gimme);
		1052	return cctx_new ();
		1053	}
		1054
		1055	static void
		1056	cctx_put (coro_cctx *cctx, int gimme)
		1057	{
		1058	/* free another cctx if overlimit */
		1059	if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX))
		1060	{
		1061	coro_cctx *first = cctx_first[gimme];
		1062	cctx_first[gimme] = first->next;
		1063	--cctx_idle[gimme];
		1064
		1065	cctx_destroy (first);
		1066	}
		1067
		1068	++cctx_idle[gimme];
		1069	cctx->next = cctx_first[gimme];
		1070	cctx_first[gimme] = cctx;
		1071	}
		1072
		1073	/ coroutine switching ***************************************************/
		1074
		1075	static void
		1076	transfer_check (pTHX_ struct coro prev, struct coro next)
		1077	{
		1078	if (expect_true (prev != next))
		1079	{
		1080	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1081	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1082
		1083	if (expect_false (next->flags & CF_RUNNING))
		1084	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1085
		1086	if (expect_false (next->flags & CF_DESTROYED))
		1087	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1088
		1089	if (
		1090	#if PERL_VERSION_ATLEAST (5,9,0)
		1091	expect_false (PL_parser)
664	#else	1092	#else
665	Safefree (cctx->sptr);	1093	expect_false (PL_lex_state != LEX_NOTPARSING)
666	#endif	1094	#endif
667		1095	)
668	Safefree (cctx);	1096	croak ("Coro::State::transfer called while parsing, but this is not supported");
669	}
670
671	static coro_cctx *
672	cctx_get ()
673	{
674	coro_cctx *cctx;
675
676	if (cctx_first)
677	{
678	cctx = cctx_first;
679	cctx_first = cctx->next;
680	--cctx_idle;
681	}
682	else
683	{
684	cctx = cctx_new ();
685	PL_op = PL_op->op_next;
686	}	1097	}
687
688	return cctx;
689	}	1098	}
690		1099
691	static void	1100	/* always use the TRANSFER macro */
692	cctx_put (coro_cctx *cctx)
693	{
694	/* free another cctx if overlimit */
695	if (cctx_idle >= MAX_IDLE_CCTX)
696	{
697	coro_cctx *first = cctx_first;
698	cctx_first = first->next;
699	--cctx_idle;
700
701	assert (!first->inuse);
702	cctx_destroy (first);
703	}
704
705	++cctx_idle;
706	cctx->next = cctx_first;
707	cctx_first = cctx;
708	}
709
710	/* never call directly, always through the coro_state_transfer global variable */
711	static void NOINLINE	1101	static void NOINLINE
712	transfer (struct coro prev, struct coro next)	1102	transfer (pTHX_ struct coro prev, struct coro next)
713	{	1103	{
714	dSTACKLEVEL;	1104	dSTACKLEVEL;
715		1105
716	/* sometimes transfer is only called to set idle_sp */	1106	/* sometimes transfer is only called to set idle_sp */
717	if (!next)	1107	if (expect_false (!next))
718	{	1108	{
719	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1109	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
720	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */	1110	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
721	}	1111	}
722	else if (prev != next)	1112	else if (expect_true (prev != next))
723	{	1113	{
724	coro_cctx *prev__cctx;	1114	coro_cctx *prev__cctx;
725		1115
726	if (prev->flags & CF_NEW)	1116	if (expect_false (prev->flags & CF_NEW))
727	{	1117	{
728	/* create a new empty context */	1118	/* create a new empty context */
729	Newz (0, prev->cctx, 1, coro_cctx);	1119	Newz (0, prev->cctx, 1, coro_cctx);
730	prev->cctx->inuse = 1;
731	prev->flags &= ~CF_NEW;	1120	prev->flags &= ~CF_NEW;
732	prev->flags \|= CF_RUNNING;	1121	prev->flags \|= CF_RUNNING;
733	}	1122	}
734		1123
735	/TODO: must not croak here /
736	if (!prev->flags & CF_RUNNING)
737	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
738
739	if (next->flags & CF_RUNNING)
740	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
741
742	if (next->flags & CF_DESTROYED)
743	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
744
745	prev->flags &= ~CF_RUNNING;	1124	prev->flags &= ~CF_RUNNING;
746	next->flags \|= CF_RUNNING;	1125	next->flags \|= CF_RUNNING;
747		1126
748	LOCK;	1127	LOCK;
749		1128
750	if (next->flags & CF_NEW)	1129	if (expect_false (next->flags & CF_NEW))
751	{	1130	{
752	/* need to start coroutine */	1131	/* need to start coroutine */
753	next->flags &= ~CF_NEW;	1132	next->flags &= ~CF_NEW;
754	/* first get rid of the old state */	1133	/* first get rid of the old state */
755	save_perl (prev);	1134	save_perl (aTHX_ prev);
756	/* setup coroutine call */	1135	/* setup coroutine call */
757	setup_coro (next);	1136	coro_setup (aTHX_ next);
758	/* need a new stack */
759	assert (!next->cctx);
760	}	1137	}
761	else	1138	else
762	{	1139	{
763	/* coroutine already started */	1140	/* coroutine already started */
764	save_perl (prev);	1141	save_perl (aTHX_ prev);
765	load_perl (next);	1142	load_perl (aTHX_ next);
766	}	1143	}
767		1144
768	prev__cctx = prev->cctx;	1145	prev__cctx = prev->cctx;
769		1146
770	/* possibly "free" the cctx */	1147	/* possibly "free" the cctx */
771	if (prev__cctx->idle_sp == STACKLEVEL)	1148	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
772	{	1149	{
773	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1150	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
774	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1151	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
775		1152
776	prev->cctx = 0;	1153	prev->cctx = 0;
777		1154
		1155	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1156	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1157	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1158	if (!next->cctx)
		1159	next->cctx = cctx_get (aTHX_ next->gimme);
		1160
778	cctx_put (prev__cctx);	1161	cctx_put (prev__cctx, prev->gimme);
779	prev__cctx->inuse = 0;
780	}	1162	}
781		1163
		1164	++next->usecount;
		1165
782	if (!next->cctx)	1166	if (expect_true (!next->cctx))
783	{
784	next->cctx = cctx_get ();	1167	next->cctx = cctx_get (aTHX_ next->gimme);
785	assert (!next->cctx->inuse);
786	next->cctx->inuse = 1;
787	}
788		1168
789	if (prev__cctx != next->cctx)	1169	if (expect_false (prev__cctx != next->cctx))
790	{	1170	{
791	prev__cctx->top_env = PL_top_env;	1171	prev__cctx->top_env = PL_top_env;
792	PL_top_env = next->cctx->top_env;	1172	PL_top_env = next->cctx->top_env;
793	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1173	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
794	}	1174	}
795		1175
796	free_coro_mortal ();	1176	free_coro_mortal (aTHX);
797	UNLOCK;	1177	UNLOCK;
		1178
		1179	if (expect_false (prev->throw \|\| next->throw))
		1180	{
		1181	struct coro *coro = SvSTATE (coro_current);
		1182
		1183	if (coro->throw)
		1184	{
		1185	SV *exception = coro->throw;
		1186	coro->throw = 0;
		1187	sv_setsv (ERRSV, exception);
		1188	croak (0);
		1189	}
		1190	}
798	}	1191	}
799	}	1192	}
800		1193
801	struct transfer_args	1194	struct transfer_args
802	{	1195	{
803	struct coro prev, next;	1196	struct coro prev, next;
804	};	1197	};
805		1198
806	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1199	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1200	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1201
		1202	/ high level stuff ******************************************************/
807		1203
808	static int	1204	static int
809	coro_state_destroy (struct coro *coro)	1205	coro_state_destroy (pTHX_ struct coro *coro)
810	{	1206	{
811	if (coro->flags & CF_DESTROYED)	1207	if (coro->flags & CF_DESTROYED)
812	return 0;	1208	return 0;
813		1209
814	coro->flags \|= CF_DESTROYED;	1210	coro->flags \|= CF_DESTROYED;
		1211
		1212	if (coro->flags & CF_READY)
		1213	{
		1214	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1215	/* alternative: look through all ready queues and remove the coro */
		1216	LOCK;
		1217	--coro_nready;
		1218	UNLOCK;
		1219	}
		1220	else
		1221	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
815		1222
816	if (coro->mainstack && coro->mainstack != main_mainstack)	1223	if (coro->mainstack && coro->mainstack != main_mainstack)
817	{	1224	{
818	assert (!(coro->flags & CF_RUNNING));
819
820	struct coro temp;	1225	struct coro temp;
821	Zero (&temp, 1, struct coro);
822	temp.save = CORO_SAVE_ALL;
823		1226
824	if (coro->flags & CF_RUNNING)	1227	if (coro->flags & CF_RUNNING)
825	croak ("FATAL: tried to destroy currently running coroutine");	1228	croak ("FATAL: tried to destroy currently running coroutine");
826		1229
827	save_perl (&temp);	1230	save_perl (aTHX_ &temp);
828	load_perl (coro);	1231	load_perl (aTHX_ coro);
829		1232
830	coro_destroy_stacks ();	1233	coro_destroy (aTHX_ coro);
831		1234
832	load_perl (&temp); /* this will get rid of defsv etc.. */	1235	load_perl (aTHX_ &temp);
833		1236
834	coro->mainstack = 0;	1237	coro->slot = 0;
835	}	1238	}
836		1239
837	cctx_destroy (coro->cctx);	1240	cctx_destroy (coro->cctx);
838	SvREFCNT_dec (coro->args);	1241	SvREFCNT_dec (coro->args);
839		1242
		1243	if (coro->next) coro->next->prev = coro->prev;
		1244	if (coro->prev) coro->prev->next = coro->next;
		1245	if (coro == coro_first) coro_first = coro->next;
		1246
840	return 1;	1247	return 1;
841	}	1248	}
842		1249
843	static int	1250	static int
844	coro_state_free (pTHX_ SV sv, MAGIC mg)	1251	coro_state_free (pTHX_ SV sv, MAGIC mg)
845	{	1252	{
846	struct coro coro = (struct coro )mg->mg_ptr;	1253	struct coro coro = (struct coro )mg->mg_ptr;
847	mg->mg_ptr = 0;	1254	mg->mg_ptr = 0;
848		1255
		1256	coro->hv = 0;
		1257
849	if (--coro->refcnt < 0)	1258	if (--coro->refcnt < 0)
850	{	1259	{
851	coro_state_destroy (coro);	1260	coro_state_destroy (aTHX_ coro);
852	Safefree (coro);	1261	Safefree (coro);
853	}	1262	}
854		1263
855	return 0;	1264	return 0;
856	}	1265	}
…		…
874	#else	1283	#else
875	# define MGf_DUP 0	1284	# define MGf_DUP 0
876	#endif	1285	#endif
877	};	1286	};
878		1287
879	static struct coro *
880	SvSTATE (SV *coro)
881	{
882	HV *stash;
883	MAGIC *mg;
884
885	if (SvROK (coro))
886	coro = SvRV (coro);
887
888	stash = SvSTASH (coro);
889	if (stash != coro_stash && stash != coro_state_stash)
890	{
891	/* very slow, but rare, check */
892	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
893	croak ("Coro::State object required");
894	}
895
896	mg = SvMAGIC (coro);
897	assert (mg->mg_type == PERL_MAGIC_ext);
898	return (struct coro *)mg->mg_ptr;
899	}
900
901	static void	1288	static void
902	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)	1289	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
903	{	1290	{
904	ta->prev = SvSTATE (prev_sv);	1291	ta->prev = SvSTATE (prev_sv);
905	ta->next = SvSTATE (next_sv);	1292	ta->next = SvSTATE (next_sv);
		1293	TRANSFER_CHECK (*ta);
906	}	1294	}
907		1295
908	static void	1296	static void
909	api_transfer (SV prev_sv, SV next_sv)	1297	api_transfer (SV prev_sv, SV next_sv)
910	{	1298	{
		1299	dTHX;
911	struct transfer_args ta;	1300	struct transfer_args ta;
912		1301
913	prepare_transfer (&ta, prev_sv, next_sv);	1302	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
914	TRANSFER (ta);	1303	TRANSFER (ta);
915	}	1304	}
916		1305
917	static int
918	api_save (SV *coro_sv, int new_save)
919	{
920	struct coro *coro = SvSTATE (coro_sv);
921	int old_save = coro->save;
922
923	if (new_save >= 0)
924	coro->save = new_save;
925
926	return old_save;
927	}
928
929	/ Coro ******************************************************************/	1306	/ Coro ******************************************************************/
930		1307
931	#define PRIO_MAX 3
932	#define PRIO_HIGH 1
933	#define PRIO_NORMAL 0
934	#define PRIO_LOW -1
935	#define PRIO_IDLE -3
936	#define PRIO_MIN -4
937
938	/* for Coro.pm */
939	static SV *coro_current;
940	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
941	static int coro_nready;
942
943	static void	1308	static void
944	coro_enq (SV *coro_sv)	1309	coro_enq (pTHX_ SV *coro_sv)
945	{	1310	{
946	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1311	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
947	coro_nready++;
948	}	1312	}
949		1313
950	static SV *	1314	static SV *
951	coro_deq (int min_prio)	1315	coro_deq (pTHX_ int min_prio)
952	{	1316	{
953	int prio = PRIO_MAX - PRIO_MIN;	1317	int prio = PRIO_MAX - PRIO_MIN;
954		1318
955	min_prio -= PRIO_MIN;	1319	min_prio -= PRIO_MIN;
956	if (min_prio < 0)	1320	if (min_prio < 0)
957	min_prio = 0;	1321	min_prio = 0;
958		1322
959	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1323	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
960	if (AvFILLp (coro_ready [prio]) >= 0)	1324	if (AvFILLp (coro_ready [prio]) >= 0)
961	{
962	coro_nready--;
963	return av_shift (coro_ready [prio]);	1325	return av_shift (coro_ready [prio]);
964	}
965		1326
966	return 0;	1327	return 0;
967	}	1328	}
968		1329
969	static int	1330	static int
970	api_ready (SV *coro_sv)	1331	api_ready (SV *coro_sv)
971	{	1332	{
		1333	dTHX;
972	struct coro *coro;	1334	struct coro *coro;
973		1335
974	if (SvROK (coro_sv))	1336	if (SvROK (coro_sv))
975	coro_sv = SvRV (coro_sv);	1337	coro_sv = SvRV (coro_sv);
976		1338
…		…
980	return 0;	1342	return 0;
981		1343
982	coro->flags \|= CF_READY;	1344	coro->flags \|= CF_READY;
983		1345
984	LOCK;	1346	LOCK;
985	coro_enq (SvREFCNT_inc (coro_sv));	1347	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1348	++coro_nready;
986	UNLOCK;	1349	UNLOCK;
987		1350
988	return 1;	1351	return 1;
989	}	1352	}
990		1353
991	static int	1354	static int
992	api_is_ready (SV *coro_sv)	1355	api_is_ready (SV *coro_sv)
993	{	1356	{
		1357	dTHX;
994	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1358	return !!(SvSTATE (coro_sv)->flags & CF_READY);
995	}	1359	}
996		1360
997	static void	1361	static void
998	prepare_schedule (struct transfer_args *ta)	1362	prepare_schedule (pTHX_ struct transfer_args *ta)
999	{	1363	{
1000	SV prev_sv, next_sv;	1364	SV prev_sv, next_sv;
1001		1365
1002	for (;;)	1366	for (;;)
1003	{	1367	{
1004	LOCK;	1368	LOCK;
1005	next_sv = coro_deq (PRIO_MIN);	1369	next_sv = coro_deq (aTHX_ PRIO_MIN);
1006	UNLOCK;
1007		1370
1008	/* nothing to schedule: call the idle handler */	1371	/* nothing to schedule: call the idle handler */
1009	if (!next_sv)	1372	if (expect_false (!next_sv))
1010	{	1373	{
1011	dSP;	1374	dSP;
		1375	UNLOCK;
1012		1376
1013	ENTER;	1377	ENTER;
1014	SAVETMPS;	1378	SAVETMPS;
1015		1379
1016	PUSHMARK (SP);	1380	PUSHMARK (SP);
…		…
1023	}	1387	}
1024		1388
1025	ta->next = SvSTATE (next_sv);	1389	ta->next = SvSTATE (next_sv);
1026		1390
1027	/* cannot transfer to destroyed coros, skip and look for next */	1391	/* cannot transfer to destroyed coros, skip and look for next */
1028	if (ta->next->flags & CF_DESTROYED)	1392	if (expect_false (ta->next->flags & CF_DESTROYED))
1029	{	1393	{
		1394	UNLOCK;
1030	SvREFCNT_dec (next_sv);	1395	SvREFCNT_dec (next_sv);
		1396	/* coro_nready is already taken care of by destroy */
1031	continue;	1397	continue;
1032	}	1398	}
1033		1399
		1400	--coro_nready;
		1401	UNLOCK;
1034	break;	1402	break;
1035	}	1403	}
1036		1404
1037	/* free this only after the transfer */	1405	/* free this only after the transfer */
1038	prev_sv = SvRV (coro_current);	1406	prev_sv = SvRV (coro_current);
1039	SvRV_set (coro_current, next_sv);
1040	ta->prev = SvSTATE (prev_sv);	1407	ta->prev = SvSTATE (prev_sv);
1041		1408	TRANSFER_CHECK (*ta);
1042	assert (ta->next->flags & CF_READY);	1409	assert (ta->next->flags & CF_READY);
1043	ta->next->flags &= ~CF_READY;	1410	ta->next->flags &= ~CF_READY;
		1411	SvRV_set (coro_current, next_sv);
1044		1412
1045	LOCK;	1413	LOCK;
1046	free_coro_mortal ();	1414	free_coro_mortal (aTHX);
1047	coro_mortal = prev_sv;	1415	coro_mortal = prev_sv;
1048	UNLOCK;	1416	UNLOCK;
1049	}	1417	}
1050		1418
1051	static void	1419	static void
1052	prepare_cede (struct transfer_args *ta)	1420	prepare_cede (pTHX_ struct transfer_args *ta)
1053	{	1421	{
1054	api_ready (coro_current);	1422	api_ready (coro_current);
1055	prepare_schedule (ta);	1423	prepare_schedule (aTHX_ ta);
1056	}	1424	}
1057		1425
1058	static int	1426	static int
1059	prepare_cede_notself (struct transfer_args *ta)	1427	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1060	{	1428	{
1061	if (coro_nready)	1429	if (coro_nready)
1062	{	1430	{
1063	SV *prev = SvRV (coro_current);	1431	SV *prev = SvRV (coro_current);
1064	prepare_schedule (ta);	1432	prepare_schedule (aTHX_ ta);
1065	api_ready (prev);	1433	api_ready (prev);
1066	return 1;	1434	return 1;
1067	}	1435	}
1068	else	1436	else
1069	return 0;	1437	return 0;
1070	}	1438	}
1071		1439
1072	static void	1440	static void
1073	api_schedule (void)	1441	api_schedule (void)
1074	{	1442	{
		1443	dTHX;
1075	struct transfer_args ta;	1444	struct transfer_args ta;
1076		1445
1077	prepare_schedule (&ta);	1446	prepare_schedule (aTHX_ &ta);
1078	TRANSFER (ta);	1447	TRANSFER (ta);
1079	}	1448	}
1080		1449
1081	static int	1450	static int
1082	api_cede (void)	1451	api_cede (void)
1083	{	1452	{
		1453	dTHX;
1084	struct transfer_args ta;	1454	struct transfer_args ta;
1085		1455
1086	prepare_cede (&ta);	1456	prepare_cede (aTHX_ &ta);
1087		1457
1088	if (ta.prev != ta.next)	1458	if (expect_true (ta.prev != ta.next))
1089	{	1459	{
1090	TRANSFER (ta);	1460	TRANSFER (ta);
1091	return 1;	1461	return 1;
1092	}	1462	}
1093	else	1463	else
…		…
1095	}	1465	}
1096		1466
1097	static int	1467	static int
1098	api_cede_notself (void)	1468	api_cede_notself (void)
1099	{	1469	{
		1470	dTHX;
1100	struct transfer_args ta;	1471	struct transfer_args ta;
1101		1472
1102	if (prepare_cede_notself (&ta))	1473	if (prepare_cede_notself (aTHX_ &ta))
1103	{	1474	{
1104	TRANSFER (ta);	1475	TRANSFER (ta);
1105	return 1;	1476	return 1;
1106	}	1477	}
1107	else	1478	else
1108	return 0;	1479	return 0;
1109	}	1480	}
1110		1481
		1482	static void
		1483	api_trace (SV *coro_sv, int flags)
		1484	{
		1485	dTHX;
		1486	struct coro *coro = SvSTATE (coro_sv);
		1487
		1488	if (flags & CC_TRACE)
		1489	{
		1490	if (!coro->cctx)
		1491	coro->cctx = cctx_new ();
		1492	else if (!(coro->cctx->flags & CC_TRACE))
		1493	croak ("cannot enable tracing on coroutine with custom stack");
		1494
		1495	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1496	}
		1497	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1498	{
		1499	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1500
		1501	if (coro->flags & CF_RUNNING)
		1502	PL_runops = RUNOPS_DEFAULT;
		1503	else
		1504	coro->slot->runops = RUNOPS_DEFAULT;
		1505	}
		1506	}
		1507
1111	MODULE = Coro::State PACKAGE = Coro::State	1508	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1112		1509
1113	PROTOTYPES: DISABLE	1510	PROTOTYPES: DISABLE
1114		1511
1115	BOOT:	1512	BOOT:
1116	{	1513	{
1117	#ifdef USE_ITHREADS	1514	#ifdef USE_ITHREADS
1118	MUTEX_INIT (&coro_mutex);	1515	MUTEX_INIT (&coro_mutex);
1119	#endif	1516	#endif
1120	BOOT_PAGESIZE;	1517	BOOT_PAGESIZE;
1121		1518
		1519	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1520	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1521
		1522	hv_sig = coro_get_hv ("SIG", TRUE);
		1523	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1524	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1525
		1526	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1527	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1528
1122	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1529	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1123		1530
		1531	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1532	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1124	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1533	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1125	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1126	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1127	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1128	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1534	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1129		1535
1130	main_mainstack = PL_mainstack;	1536	main_mainstack = PL_mainstack;
		1537	main_top_env = PL_top_env;
		1538
		1539	while (main_top_env->je_prev)
		1540	main_top_env = main_top_env->je_prev;
1131		1541
1132	coroapi.ver = CORO_API_VERSION;	1542	coroapi.ver = CORO_API_VERSION;
1133	coroapi.transfer = api_transfer;	1543	coroapi.transfer = api_transfer;
1134		1544
1135	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1545	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1142	struct coro *coro;	1552	struct coro *coro;
1143	HV *hv;	1553	HV *hv;
1144	int i;	1554	int i;
1145		1555
1146	Newz (0, coro, 1, struct coro);	1556	Newz (0, coro, 1, struct coro);
1147	coro->args = newAV ();	1557	coro->args = newAV ();
1148	coro->save = CORO_SAVE_ALL;
1149	coro->flags = CF_NEW;	1558	coro->flags = CF_NEW;
1150		1559
		1560	if (coro_first) coro_first->prev = coro;
		1561	coro->next = coro_first;
		1562	coro_first = coro;
		1563
1151	hv = newHV ();	1564	coro->hv = hv = newHV ();
1152	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1565	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1153	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1566	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1154		1567
		1568	av_extend (coro->args, items - 1);
1155	for (i = 1; i < items; i++)	1569	for (i = 1; i < items; i++)
1156	av_push (coro->args, newSVsv (ST (i)));	1570	av_push (coro->args, newSVsv (ST (i)));
1157	}	1571	}
1158	OUTPUT:	1572	OUTPUT:
1159	RETVAL	1573	RETVAL
1160		1574
1161	int	1575	# these not obviously related functions are all rolled into the same xs
1162	save (SV *coro, int new_save = -1)	1576	# function to increase chances that they all will call transfer with the same
1163	CODE:	1577	# stack offset
1164	RETVAL = api_save (coro, new_save);
1165	OUTPUT:
1166	RETVAL
1167
1168	void	1578	void
1169	_set_stacklevel (...)	1579	_set_stacklevel (...)
1170	ALIAS:	1580	ALIAS:
1171	Coro::State::transfer = 1	1581	Coro::State::transfer = 1
1172	Coro::schedule = 2	1582	Coro::schedule = 2
1173	Coro::cede = 3	1583	Coro::cede = 3
1174	Coro::cede_notself = 4	1584	Coro::cede_notself = 4
		1585	Coro::Event::next = 5
		1586	Coro::Event::next_cancel = 6
1175	CODE:	1587	PPCODE:
1176	{	1588	{
1177	struct transfer_args ta;	1589	struct transfer_args ta;
		1590	int again = 0;
1178		1591
1179	switch (ix)	1592	do
1180	{	1593	{
		1594	switch (ix)
		1595	{
1181	case 0:	1596	case 0:
1182	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1597	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1183	ta.next = 0;	1598	ta.next = 0;
1184	break;	1599	break;
1185		1600
1186	case 1:	1601	case 1:
1187	if (items != 2)	1602	if (items != 2)
1188	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1603	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1189		1604
1190	prepare_transfer (&ta, ST (0), ST (1));	1605	prepare_transfer (aTHX_ &ta, ST(0), ST(1));
1191	break;	1606	break;
1192		1607
1193	case 2:	1608	case 2:
1194	prepare_schedule (&ta);	1609	prepare_schedule (aTHX_ &ta);
1195	break;	1610	break;
1196		1611
1197	case 3:	1612	case 3:
1198	prepare_cede (&ta);	1613	prepare_cede (aTHX_ &ta);
1199	break;	1614	break;
1200		1615
1201	case 4:	1616	case 4:
1202	if (!prepare_cede_notself (&ta))	1617	if (!prepare_cede_notself (aTHX_ &ta))
1203	XSRETURN_EMPTY;	1618	XSRETURN_EMPTY;
1204		1619
1205	break;	1620	break;
		1621
		1622	case 5:
		1623	case 6:
		1624	if (items != 1)
		1625	croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
		1626
		1627	{
		1628	SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
		1629
		1630	if (ev)
		1631	{
		1632	if (GIMME_V != G_VOID)
		1633	{
		1634	XPUSHs (ev);
		1635	XSRETURN (1);
		1636	}
		1637	else
		1638	XSRETURN_EMPTY;
		1639	}
		1640	}
		1641
		1642	prepare_schedule (aTHX_ &ta);
		1643	again = 1;
		1644	break;
		1645	}
		1646
		1647	/* our caller, entersub, caches only this value */
		1648	ta.prev->gimme = GIMME_V == G_VOID ? 0
		1649	: GIMME_V == G_SCALAR ? 1
		1650	: 2;
		1651
		1652	/* we need to save all local variables, as we might execute a different coroutine when transfer returns */
		1653	sp += 2; /* save args */
		1654	EXTEND (SP, 4);
		1655	PUSHs ((SV *)(intptr_t)items);
		1656	PUSHs ((SV *)(intptr_t)ix);
		1657	PUSHs ((SV *)(intptr_t)ax);
		1658	PUSHs ((SV *)(intptr_t)again);
		1659	PUTBACK;
		1660	BARRIER;
		1661	TRANSFER (ta);
		1662	BARRIER;
		1663	SPAGAIN;
		1664	again = (intptr_t)POPs;
		1665	ax = (intptr_t)POPs;
		1666	ix = (intptr_t)POPs;
		1667	items = (intptr_t)POPs;
		1668	sp -= 2; /* restore args */
1206	}	1669	}
		1670	while (again);
1207		1671
1208	BARRIER;
1209	TRANSFER (ta);
1210
1211	if (GIMME_V != G_VOID && ta.next != ta.prev)	1672	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1212	XSRETURN_YES;	1673	XSRETURN_YES;
		1674
		1675	XSRETURN_EMPTY; /* not understood why this is necessary, likely some stack handling bug */
1213	}	1676	}
1214		1677
1215	bool	1678	bool
1216	_destroy (SV *coro_sv)	1679	_destroy (SV *coro_sv)
1217	CODE:	1680	CODE:
1218	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1681	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1219	OUTPUT:	1682	OUTPUT:
1220	RETVAL	1683	RETVAL
1221		1684
1222	void	1685	void
1223	_exit (code)	1686	_exit (code)
…		…
1225	PROTOTYPE: $	1688	PROTOTYPE: $
1226	CODE:	1689	CODE:
1227	_exit (code);	1690	_exit (code);
1228		1691
1229	int	1692	int
		1693	cctx_stacksize (int new_stacksize = 0)
		1694	CODE:
		1695	RETVAL = coro_stacksize;
		1696	if (new_stacksize)
		1697	coro_stacksize = new_stacksize;
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	int
1230	cctx_count ()	1702	cctx_count ()
1231	CODE:	1703	CODE:
1232	RETVAL = cctx_count;	1704	RETVAL = cctx_count;
1233	OUTPUT:	1705	OUTPUT:
1234	RETVAL	1706	RETVAL
1235		1707
1236	int	1708	int
1237	cctx_idle ()	1709	cctx_idle ()
1238	CODE:	1710	CODE:
1239	RETVAL = cctx_idle;	1711	RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2];
1240	OUTPUT:	1712	OUTPUT:
1241	RETVAL	1713	RETVAL
1242		1714
		1715	void
		1716	list ()
		1717	PPCODE:
		1718	{
		1719	struct coro *coro;
		1720	for (coro = coro_first; coro; coro = coro->next)
		1721	if (coro->hv)
		1722	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1723	}
		1724
		1725	void
		1726	call (Coro::State coro, SV *coderef)
		1727	ALIAS:
		1728	eval = 1
		1729	CODE:
		1730	{
		1731	if (coro->mainstack)
		1732	{
		1733	struct coro temp;
		1734
		1735	if (!(coro->flags & CF_RUNNING))
		1736	{
		1737	save_perl (aTHX_ &temp);
		1738	load_perl (aTHX_ coro);
		1739	}
		1740
		1741	{
		1742	dSP;
		1743	ENTER;
		1744	SAVETMPS;
		1745	PUTBACK;
		1746	PUSHSTACK;
		1747	PUSHMARK (SP);
		1748
		1749	if (ix)
		1750	eval_sv (coderef, 0);
		1751	else
		1752	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1753
		1754	POPSTACK;
		1755	FREETMPS;
		1756	LEAVE;
		1757	}
		1758
		1759	if (!(coro->flags & CF_RUNNING))
		1760	{
		1761	save_perl (aTHX_ coro);
		1762	load_perl (aTHX_ &temp);
		1763	}
		1764	}
		1765	}
		1766
		1767	SV *
		1768	is_ready (Coro::State coro)
		1769	PROTOTYPE: $
		1770	ALIAS:
		1771	is_ready = CF_READY
		1772	is_running = CF_RUNNING
		1773	is_new = CF_NEW
		1774	is_destroyed = CF_DESTROYED
		1775	CODE:
		1776	RETVAL = boolSV (coro->flags & ix);
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	void
		1781	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1782
		1783	SV *
		1784	has_stack (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = boolSV (!!coro->cctx);
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	int
		1792	is_traced (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	IV
		1800	rss (Coro::State coro)
		1801	PROTOTYPE: $
		1802	ALIAS:
		1803	usecount = 1
		1804	CODE:
		1805	switch (ix)
		1806	{
		1807	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1808	case 1: RETVAL = coro->usecount; break;
		1809	}
		1810	OUTPUT:
		1811	RETVAL
		1812
		1813
1243	MODULE = Coro::State PACKAGE = Coro	1814	MODULE = Coro::State PACKAGE = Coro
1244		1815
1245	BOOT:	1816	BOOT:
1246	{	1817	{
1247	int i;	1818	int i;
1248		1819
		1820	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1821	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1822	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1823
		1824	coro_current = coro_get_sv ("Coro::current", FALSE);
		1825	SvREADONLY_on (coro_current);
		1826
1249	coro_stash = gv_stashpv ("Coro", TRUE);	1827	coro_stash = gv_stashpv ("Coro", TRUE);
1250		1828
1251	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1829	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1252	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1830	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1253	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1831	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1254	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1832	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1255	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1833	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1256	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1834	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1257		1835
1258	coro_current = get_sv ("Coro::current", FALSE);
1259	SvREADONLY_on (coro_current);
1260
1261	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1836	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1262	coro_ready[i] = newAV ();	1837	coro_ready[i] = newAV ();
1263		1838
1264	{	1839	{
1265	SV *sv = perl_get_sv("Coro::API", 1);	1840	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1841	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1266		1842
1267	coroapi.schedule = api_schedule;	1843	coroapi.schedule = api_schedule;
1268	coroapi.save = api_save;
1269	coroapi.cede = api_cede;	1844	coroapi.cede = api_cede;
1270	coroapi.cede_notself = api_cede_notself;	1845	coroapi.cede_notself = api_cede_notself;
1271	coroapi.ready = api_ready;	1846	coroapi.ready = api_ready;
1272	coroapi.is_ready = api_is_ready;	1847	coroapi.is_ready = api_is_ready;
1273	coroapi.nready = &coro_nready;	1848	coroapi.nready = &coro_nready;
…		…
1314	CODE:	1889	CODE:
1315	RETVAL = boolSV (api_ready (self));	1890	RETVAL = boolSV (api_ready (self));
1316	OUTPUT:	1891	OUTPUT:
1317	RETVAL	1892	RETVAL
1318		1893
1319	SV *
1320	is_ready (SV *self)
1321	PROTOTYPE: $
1322	CODE:
1323	RETVAL = boolSV (api_is_ready (self));
1324	OUTPUT:
1325	RETVAL
1326
1327	int	1894	int
1328	nready (...)	1895	nready (...)
1329	PROTOTYPE:	1896	PROTOTYPE:
1330	CODE:	1897	CODE:
1331	RETVAL = coro_nready;	1898	RETVAL = coro_nready;
1332	OUTPUT:	1899	OUTPUT:
1333	RETVAL	1900	RETVAL
1334		1901
		1902	void
		1903	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1904	PROTOTYPE: $;$
		1905	CODE:
		1906	SvREFCNT_dec (self->throw);
		1907	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1908
		1909	# for async_pool speedup
		1910	void
		1911	_pool_1 (SV *cb)
		1912	CODE:
		1913	{
		1914	struct coro *coro = SvSTATE (coro_current);
		1915	HV hv = (HV )SvRV (coro_current);
		1916	AV *defav = GvAV (PL_defgv);
		1917	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1918	AV *invoke_av;
		1919	int i, len;
		1920
		1921	if (!invoke)
		1922	croak ("\3async_pool terminate\2\n");
		1923
		1924	SvREFCNT_dec (coro->saved_deffh);
		1925	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1926
		1927	hv_store (hv, "desc", sizeof ("desc") - 1,
		1928	newSVpvn (strpair ("[async_pool]")), 0);
		1929
		1930	invoke_av = (AV *)SvRV (invoke);
		1931	len = av_len (invoke_av);
		1932
		1933	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1934
		1935	if (len > 0)
		1936	{
		1937	av_fill (defav, len - 1);
		1938	for (i = 0; i < len; ++i)
		1939	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1940	}
		1941
		1942	SvREFCNT_dec (invoke);
		1943	}
		1944
		1945	void
		1946	_pool_2 (SV *cb)
		1947	CODE:
		1948	{
		1949	struct coro *coro = SvSTATE (coro_current);
		1950
		1951	sv_setsv (cb, &PL_sv_undef);
		1952
		1953	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1954	coro->saved_deffh = 0;
		1955
		1956	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1957	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1958	croak ("\3async_pool terminate\2\n");
		1959
		1960	av_clear (GvAV (PL_defgv));
		1961	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1962	newSVpvn (strpair ("[async_pool idle]")), 0);
		1963
		1964	coro->prio = 0;
		1965
		1966	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1967	api_trace (coro_current, 0);
		1968
		1969	av_push (av_async_pool, newSVsv (coro_current));
		1970	}
		1971
		1972
1335	MODULE = Coro::State PACKAGE = Coro::AIO	1973	MODULE = Coro::State PACKAGE = Coro::AIO
1336		1974
1337	SV *	1975	SV *
1338	_get_state ()	1976	_get_state ()
1339	CODE:	1977	CODE:

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Comparing Coro/Coro/State.xs (file contents): Revision 1.136 by root, Fri Jan 12 01:05:55 2007 UTC vs. Revision 1.209 by root, Wed Oct 10 02:58:17 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.136 by root, Fri Jan 12 01:05:55 2007 UTC vs.
Revision 1.209 by root, Wed Oct 10 02:58:17 2007 UTC