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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.127 by root, Tue Dec 12 13:56:45 2006 UTC vs.
Revision 1.210 by root, Wed Oct 10 03:24:40 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)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
98	#else	114	#else
99	# define attribute(x)	115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
100	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
101		122
102	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
103		124
104	#include "CoroAPI.h"	125	#include "CoroAPI.h"
105		126
…		…
110	#else	131	#else
111	# define LOCK (void)0	132	# define LOCK (void)0
112	# define UNLOCK (void)0	133	# define UNLOCK (void)0
113	#endif	134	#endif
114		135
		136	#define strpair(const) const, sizeof (const) - 1
		137
		138	/* helper storage struct for Coro::AIO */
115	struct io_state	139	struct io_state
116	{	140	{
117	int errorno;	141	int errorno;
118	I32 laststype;	142	I32 laststype;
119	int laststatval;	143	int laststatval;
120	Stat_t statcache;	144	Stat_t statcache;
121	};	145	};
122		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
123	static struct CoroAPI coroapi;	148	static struct CoroAPI coroapi;
124	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;
125	static HV *coro_state_stash, *coro_stash;	151	static HV *coro_state_stash, *coro_stash;
126	static SV *coro_mortal; /* will be freed after next transfer */	152	static SV *coro_mortal; /* will be freed after next transfer */
127		153
128	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 */
129	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	};
130		177
131	/* this is a structure representing a c-level coroutine */	178	/* this is a structure representing a c-level coroutine */
132	typedef struct coro_cctx {	179	typedef struct coro_cctx {
133	struct coro_cctx *next;	180	struct coro_cctx *next;
134		181
135	/* the stack */	182	/* the stack */
136	void *sptr;	183	void *sptr;
137	long ssize; /* positive == mmap, otherwise malloc */	184	size_t ssize;
138		185
139	/* cpu state */	186	/* cpu state */
140	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	187	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		188	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
141	JMPENV *top_env;	189	JMPENV *top_env;
142	coro_context cctx;	190	coro_context cctx;
143		191
144	int inuse;
145
146	#if USE_VALGRIND	192	#if CORO_USE_VALGRIND
147	int valgrind_id;	193	int valgrind_id;
148	#endif	194	#endif
		195	unsigned char flags;
149	} coro_cctx;	196	} coro_cctx;
150		197
151	enum {	198	enum {
152	CF_RUNNING = 0x0001, /* coroutine is running */	199	CF_RUNNING = 0x0001, /* coroutine is running */
153	CF_READY = 0x0002, /* coroutine is ready */	200	CF_READY = 0x0002, /* coroutine is ready */
154	CF_NEW = 0x0004, /* ahs never been switched to */	201	CF_NEW = 0x0004, /* has never been switched to */
		202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
155	};	203	};
		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))
156		217
157	/* this is a structure representing a perl-level coroutine */	218	/* this is a structure representing a perl-level coroutine */
158	struct coro {	219	struct coro {
159	/* the c coroutine allocated to this perl coroutine, if any */	220	/* the c coroutine allocated to this perl coroutine, if any */
160	coro_cctx *cctx;	221	coro_cctx *cctx;
		222	int gimme;
161		223
		224	/* process data */
		225	AV *mainstack;
		226	perl_slots *slot; /* basically the saved sp */
		227
162	/* data associated with this coroutine (initial args) */	228	AV *args; /* data associated with this coroutine (initial args) */
163	AV *args;	229	int refcnt; /* coroutines are refcounted, yes */
164	int refcnt;
165	int save; /* CORO_SAVE flags */
166	int flags; /* CF_ flags */	230	int flags; /* CF_ flags */
		231	HV *hv; /* the perl hash associated with this coro, if any */
167		232
168	/* optionally saved, might be zero */	233	/* statistics */
169	AV *defav; /* @_ */	234	int usecount; /* number of transfers to this coro */
170	SV *defsv; /* $_ */
171	SV *errsv; /* $@ */
172	SV *irssv; /* $/ */
173	SV *irssv_sv; /* real $/ cache */
174
175	#define VAR(name,type) type name;
176	# include "state.h"
177	#undef VAR
178		235
179	/* coro process data */	236	/* coro process data */
180	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;
181	};	245	};
182		246
183	typedef struct coro *Coro__State;	247	typedef struct coro *Coro__State;
184	typedef struct coro *Coro__State_or_hashref;	248	typedef struct coro *Coro__State_or_hashref;
185		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
186	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 *
187	coro_clone_padlist (CV *cv)	298	coro_clone_padlist (pTHX_ CV *cv)
188	{	299	{
189	AV *padlist = CvPADLIST (cv);	300	AV *padlist = CvPADLIST (cv);
190	AV *newpadlist, *newpad;	301	AV *newpadlist, *newpad;
191		302
192	newpadlist = newAV ();	303	newpadlist = newAV ();
…		…
204		315
205	return newpadlist;	316	return newpadlist;
206	}	317	}
207		318
208	static void	319	static void
209	free_padlist (AV *padlist)	320	free_padlist (pTHX_ AV *padlist)
210	{	321	{
211	/* may be during global destruction */	322	/* may be during global destruction */
212	if (SvREFCNT (padlist))	323	if (SvREFCNT (padlist))
213	{	324	{
214	I32 i = AvFILLp (padlist);	325	I32 i = AvFILLp (padlist);
…		…
235	AV *padlist;	346	AV *padlist;
236	AV *av = (AV *)mg->mg_obj;	347	AV *av = (AV *)mg->mg_obj;
237		348
238	/* casting is fun. */	349	/* casting is fun. */
239	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	350	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
240	free_padlist (padlist);	351	free_padlist (aTHX_ padlist);
241		352
242	SvREFCNT_dec (av);	353	SvREFCNT_dec (av);
243		354
244	return 0;	355	return 0;
245	}	356	}
…		…
253	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	364	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
254	? SvMAGIC (cv) \	365	? SvMAGIC (cv) \
255	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	366	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
256	: 0	367	: 0
257		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
258	/* the next two functions merely cache the padlists */	395	/* the next two functions merely cache the padlists */
259	static void	396	static void
260	get_padlist (CV *cv)	397	get_padlist (pTHX_ CV *cv)
261	{	398	{
262	MAGIC *mg = CORO_MAGIC (cv);	399	MAGIC *mg = CORO_MAGIC (cv);
263	AV *av;	400	AV *av;
264		401
265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	402	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	403	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
267	else	404	else
268	{	405	{
269	#if PREFER_PERL_FUNCTIONS	406	#if CORO_PREFER_PERL_FUNCTIONS
270	/* this is probably cleaner, but also slower? */	407	/* this is probably cleaner, but also slower? */
271	CV *cp = Perl_cv_clone (cv);	408	CV *cp = Perl_cv_clone (cv);
272	CvPADLIST (cv) = CvPADLIST (cp);	409	CvPADLIST (cv) = CvPADLIST (cp);
273	CvPADLIST (cp) = 0;	410	CvPADLIST (cp) = 0;
274	SvREFCNT_dec (cp);	411	SvREFCNT_dec (cp);
275	#else	412	#else
276	CvPADLIST (cv) = coro_clone_padlist (cv);	413	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
277	#endif	414	#endif
278	}	415	}
279	}	416	}
280		417
281	static void	418	static void
282	put_padlist (CV *cv)	419	put_padlist (pTHX_ CV *cv)
283	{	420	{
284	MAGIC *mg = CORO_MAGIC (cv);	421	MAGIC *mg = CORO_MAGIC (cv);
285	AV *av;	422	AV *av;
286		423
287	if (!mg)	424	if (expect_false (!mg))
288	{	425	{
289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	426	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291	mg->mg_virtual = &vtbl_coro;	428	mg->mg_virtual = &vtbl_coro;
292	mg->mg_obj = (SV *)newAV ();	429	mg->mg_obj = (SV *)newAV ();
293	}	430	}
294		431
295	av = (AV *)mg->mg_obj;	432	av = (AV *)mg->mg_obj;
296		433
297	if (AvFILLp (av) >= AvMAX (av))	434	if (expect_false (AvFILLp (av) >= AvMAX (av)))
298	av_extend (av, AvMAX (av) + 1);	435	av_extend (av, AvMAX (av) + 1);
299		436
300	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	437	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
301	}	438	}
302		439
303	#define SB do {	440	/** load & save, init *******************************************************/
304	#define SE } while (0)
305		441
306	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
307
308	static void	442	static void
309	load_perl (Coro__State c)	443	load_perl (pTHX_ Coro__State c)
310	{	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
311	#define VAR(name,type) PL_ ## name = c->name;	455	#define VAR(name,type) PL_ ## name = slot->name;
312	# include "state.h"	456	# include "state.h"
313	#undef VAR	457	#undef VAR
314		458
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	459	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	460	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318	if (c->irssv)
319	{
320	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
321	SvREFCNT_dec (c->irssv);
322	else
323	{
324	REPLACE_SV (PL_rs, c->irssv);
325	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
326	sv_setsv (c->irssv_sv, PL_rs);
327	}
328	}
329		461
330	{	462	{
331	dSP;	463	dSP;
		464
332	CV *cv;	465	CV *cv;
333		466
334	/* now do the ugly restore mess */	467	/* now do the ugly restore mess */
335	while ((cv = (CV *)POPs))	468	while (expect_true (cv = (CV *)POPs))
336	{	469	{
337	put_padlist (cv); /* mark this padlist as available */	470	put_padlist (aTHX_ cv); /* mark this padlist as available */
338	CvDEPTH (cv) = PTR2IV (POPs);	471	CvDEPTH (cv) = PTR2IV (POPs);
339	CvPADLIST (cv) = (AV *)POPs;	472	CvPADLIST (cv) = (AV *)POPs;
340	}	473	}
341		474
342	PUTBACK;	475	PUTBACK;
343	}	476	}
344	}	477	}
345		478
346	static void	479	static void
347	save_perl (Coro__State c)	480	save_perl (pTHX_ Coro__State c)
348	{	481	{
349	{	482	{
350	dSP;	483	dSP;
351	I32 cxix = cxstack_ix;	484	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	485	PERL_CONTEXT *ccstk = cxstack;
…		…
355	/*	488	/*
356	* 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
357	* (and reinitialize) all cv's in the whole callchain :(	490	* (and reinitialize) all cv's in the whole callchain :(
358	*/	491	*/
359		492
360	EXTEND (SP, 3 + 1);
361	PUSHs (Nullsv);	493	XPUSHs (Nullsv);
362	/* this loop was inspired by pp_caller */	494	/* this loop was inspired by pp_caller */
363	for (;;)	495	for (;;)
364	{	496	{
365	while (cxix >= 0)	497	while (expect_true (cxix >= 0))
366	{	498	{
367	PERL_CONTEXT *cx = &ccstk[cxix--];	499	PERL_CONTEXT *cx = &ccstk[cxix--];
368		500
369	if (CxTYPE (cx) == CXt_SUB)	501	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
370	{	502	{
371	CV *cv = cx->blk_sub.cv;	503	CV *cv = cx->blk_sub.cv;
372		504
373	if (CvDEPTH (cv))	505	if (expect_true (CvDEPTH (cv)))
374	{	506	{
375	EXTEND (SP, 3);	507	EXTEND (SP, 3);
376	PUSHs ((SV *)CvPADLIST (cv));	508	PUSHs ((SV *)CvPADLIST (cv));
377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	509	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
378	PUSHs ((SV *)cv);	510	PUSHs ((SV *)cv);
379		511
380	CvDEPTH (cv) = 0;	512	CvDEPTH (cv) = 0;
381	get_padlist (cv);	513	get_padlist (aTHX_ cv);
382	}	514	}
383	}	515	}
384	}	516	}
385		517
386	if (top_si->si_type == PERLSI_MAIN)	518	if (expect_true (top_si->si_type == PERLSI_MAIN))
387	break;	519	break;
388		520
389	top_si = top_si->si_prev;	521	top_si = top_si->si_prev;
390	ccstk = top_si->si_cxstack;	522	ccstk = top_si->si_cxstack;
391	cxix = top_si->si_cxix;	523	cxix = top_si->si_cxix;
392	}	524	}
393		525
394	PUTBACK;	526	PUTBACK;
395	}	527	}
396		528
397	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 */
398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	530	/* we manually unroll here, as usually 2 slots is enough */
399	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	531	if (SLOT_COUNT >= 1) CXINC;
400	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 */
401		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
402	#define VAR(name,type)c->name = PL_ ## name;	551	#define VAR(name,type) slot->name = PL_ ## name;
403	# include "state.h"	552	# include "state.h"
404	#undef VAR	553	#undef VAR
		554	}
405	}	555	}
406		556
407	/*	557	/*
408	* allocate various perl stacks. This is an exact copy	558	* allocate various perl stacks. This is an exact copy
409	* of perl.c:init_stacks, except that it uses less memory	559	* of perl.c:init_stacks, except that it uses less memory
410	* on the (sometimes correct) assumption that coroutines do	560	* on the (sometimes correct) assumption that coroutines do
411	* not usually need a lot of stackspace.	561	* not usually need a lot of stackspace.
412	*/	562	*/
413	#if PREFER_PERL_FUNCTIONS	563	#if CORO_PREFER_PERL_FUNCTIONS
414	# define coro_init_stacks init_stacks	564	# define coro_init_stacks init_stacks
415	#else	565	#else
416	static void	566	static void
417	coro_init_stacks ()	567	coro_init_stacks (pTHX)
418	{	568	{
419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	569	PL_curstackinfo = new_stackinfo(32, 8);
420	PL_curstackinfo->si_type = PERLSI_MAIN;	570	PL_curstackinfo->si_type = PERLSI_MAIN;
421	PL_curstack = PL_curstackinfo->si_stack;	571	PL_curstack = PL_curstackinfo->si_stack;
422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	572	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423		573
424	PL_stack_base = AvARRAY(PL_curstack);	574	PL_stack_base = AvARRAY(PL_curstack);
425	PL_stack_sp = PL_stack_base;	575	PL_stack_sp = PL_stack_base;
426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	576	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427		577
428	New(50,PL_tmps_stack,128,SV*);	578	New(50,PL_tmps_stack,32,SV*);
429	PL_tmps_floor = -1;	579	PL_tmps_floor = -1;
430	PL_tmps_ix = -1;	580	PL_tmps_ix = -1;
431	PL_tmps_max = 128;	581	PL_tmps_max = 32;
432		582
433	New(54,PL_markstack,32,I32);	583	New(54,PL_markstack,16,I32);
434	PL_markstack_ptr = PL_markstack;	584	PL_markstack_ptr = PL_markstack;
435	PL_markstack_max = PL_markstack + 32;	585	PL_markstack_max = PL_markstack + 16;
436		586
437	#ifdef SET_MARK_OFFSET	587	#ifdef SET_MARK_OFFSET
438	SET_MARK_OFFSET;	588	SET_MARK_OFFSET;
439	#endif	589	#endif
440		590
441	New(54,PL_scopestack,32,I32);	591	New(54,PL_scopestack,8,I32);
442	PL_scopestack_ix = 0;	592	PL_scopestack_ix = 0;
443	PL_scopestack_max = 32;	593	PL_scopestack_max = 8;
444		594
445	New(54,PL_savestack,64,ANY);	595	New(54,PL_savestack,24,ANY);
446	PL_savestack_ix = 0;	596	PL_savestack_ix = 0;
447	PL_savestack_max = 64;	597	PL_savestack_max = 24;
448		598
449	#if !PERL_VERSION_ATLEAST (5,9,0)	599	#if !PERL_VERSION_ATLEAST (5,9,0)
450	New(54,PL_retstack,16,OP*);	600	New(54,PL_retstack,4,OP*);
451	PL_retstack_ix = 0;	601	PL_retstack_ix = 0;
452	PL_retstack_max = 16;	602	PL_retstack_max = 4;
453	#endif	603	#endif
454	}	604	}
455	#endif	605	#endif
456		606
457	/*	607	/*
458	* destroy the stacks, the callchain etc...	608	* destroy the stacks, the callchain etc...
459	*/	609	*/
460	static void	610	static void
461	coro_destroy_stacks ()	611	coro_destroy_stacks (pTHX)
462	{	612	{
463	if (!IN_DESTRUCT)
464	{
465	/* restore all saved variables and stuff */
466	LEAVE_SCOPE (0);
467	assert (PL_tmps_floor == -1);
468
469	/* free all temporaries */
470	FREETMPS;
471	assert (PL_tmps_ix == -1);
472
473	POPSTACK_TO (PL_mainstack);
474	}
475
476	while (PL_curstackinfo->si_next)	613	while (PL_curstackinfo->si_next)
477	PL_curstackinfo = PL_curstackinfo->si_next;	614	PL_curstackinfo = PL_curstackinfo->si_next;
478		615
479	while (PL_curstackinfo)	616	while (PL_curstackinfo)
480	{	617	{
…		…
495	#if !PERL_VERSION_ATLEAST (5,9,0)	632	#if !PERL_VERSION_ATLEAST (5,9,0)
496	Safefree (PL_retstack);	633	Safefree (PL_retstack);
497	#endif	634	#endif
498	}	635	}
499		636
500	static void	637	static size_t
501	setup_coro (struct coro *coro)	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
		676	static void
		677	coro_setup (pTHX_ struct coro *coro)
502	{	678	{
503	/*	679	/*
504	* emulate part of the perl startup here.	680	* emulate part of the perl startup here.
505	*/	681	*/
506
507	coro_init_stacks ();	682	coro_init_stacks (aTHX);
508		683
		684	PL_runops = RUNOPS_DEFAULT;
509	PL_curcop = &PL_compiling;	685	PL_curcop = &PL_compiling;
510	PL_in_eval = EVAL_NULL;	686	PL_in_eval = EVAL_NULL;
		687	PL_comppad = 0;
511	PL_curpm = 0;	688	PL_curpm = 0;
		689	PL_curpad = 0;
512	PL_localizing = 0;	690	PL_localizing = 0;
513	PL_dirty = 0;	691	PL_dirty = 0;
514	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);
515		702
516	{	703	{
517	dSP;	704	dSP;
518	LOGOP myop;	705	LOGOP myop;
519		706
520	SvREFCNT_dec (GvAV (PL_defgv));
521	GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523	Zero (&myop, 1, LOGOP);	707	Zero (&myop, 1, LOGOP);
524	myop.op_next = Nullop;	708	myop.op_next = Nullop;
525	myop.op_flags = OPf_WANT_VOID;	709	myop.op_flags = OPf_WANT_VOID;
526		710
527	PUSHMARK (SP);	711	PUSHMARK (SP);
528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	712	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
529	PUTBACK;	713	PUTBACK;
530	PL_op = (OP *)&myop;	714	PL_op = (OP *)&myop;
531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	715	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532	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;
533	}	731	}
534		732
535	ENTER; /* necessary e.g. for dounwind */	733	/* this newly created coroutine might be run on an existing cctx which most
		734	* likely was suspended in set_stacklevel, called from entersub.
		735	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		736	* so we ENTER here for symmetry
		737	*/
		738	ENTER;
536	}	739	}
537		740
538	static void	741	static void
		742	coro_destroy (pTHX_ struct coro *coro)
		743	{
		744	if (!IN_DESTRUCT)
		745	{
		746	/* restore all saved variables and stuff */
		747	LEAVE_SCOPE (0);
		748	assert (PL_tmps_floor == -1);
		749
		750	/* free all temporaries */
		751	FREETMPS;
		752	assert (PL_tmps_ix == -1);
		753
		754	/* unwind all extra stacks */
		755	POPSTACK_TO (PL_mainstack);
		756
		757	/* unwind main stack */
		758	dounwind (-1);
		759	}
		760
		761	SvREFCNT_dec (GvSV (PL_defgv));
		762	SvREFCNT_dec (GvAV (PL_defgv));
		763	SvREFCNT_dec (GvSV (PL_errgv));
		764	SvREFCNT_dec (PL_defoutgv);
		765	SvREFCNT_dec (PL_rs);
		766	SvREFCNT_dec (GvSV (irsgv));
		767
		768	SvREFCNT_dec (PL_diehook);
		769	SvREFCNT_dec (PL_warnhook);
		770
		771	SvREFCNT_dec (coro->saved_deffh);
		772	SvREFCNT_dec (coro->throw);
		773
		774	coro_destroy_stacks (aTHX);
		775	}
		776
		777	static void
539	free_coro_mortal ()	778	free_coro_mortal (pTHX)
540	{	779	{
541	if (coro_mortal)	780	if (expect_true (coro_mortal))
542	{	781	{
543	SvREFCNT_dec (coro_mortal);	782	SvREFCNT_dec (coro_mortal);
544	coro_mortal = 0;	783	coro_mortal = 0;
545	}	784	}
546	}	785	}
547		786
		787	static int
		788	runops_trace (pTHX)
		789	{
		790	COP *oldcop = 0;
		791	int oldcxix = -2;
		792	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		793	coro_cctx *cctx = coro->cctx;
		794
		795	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		796	{
		797	PERL_ASYNC_CHECK ();
		798
		799	if (cctx->flags & CC_TRACE_ALL)
		800	{
		801	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		802	{
		803	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		804	SV **bot, **top;
		805	AV *av = newAV (); /* return values */
		806	SV **cb;
		807	dSP;
		808
		809	GV *gv = CvGV (cx->blk_sub.cv);
		810	SV *fullname = sv_2mortal (newSV (0));
		811	if (isGV (gv))
		812	gv_efullname3 (fullname, gv, 0);
		813
		814	bot = PL_stack_base + cx->blk_oldsp + 1;
		815	top = cx->blk_gimme == G_ARRAY ? SP + 1
		816	: cx->blk_gimme == G_SCALAR ? bot + 1
		817	: bot;
		818
		819	av_extend (av, top - bot);
		820	while (bot < top)
		821	av_push (av, SvREFCNT_inc (*bot++));
		822
		823	PL_runops = RUNOPS_DEFAULT;
		824	ENTER;
		825	SAVETMPS;
		826	EXTEND (SP, 3);
		827	PUSHMARK (SP);
		828	PUSHs (&PL_sv_no);
		829	PUSHs (fullname);
		830	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		831	PUTBACK;
		832	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		833	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		834	SPAGAIN;
		835	FREETMPS;
		836	LEAVE;
		837	PL_runops = runops_trace;
		838	}
		839
		840	if (oldcop != PL_curcop)
		841	{
		842	oldcop = PL_curcop;
		843
		844	if (PL_curcop != &PL_compiling)
		845	{
		846	SV **cb;
		847
		848	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		849	{
		850	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		851
		852	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		853	{
		854	runops_proc_t old_runops = PL_runops;
		855	dSP;
		856	GV *gv = CvGV (cx->blk_sub.cv);
		857	SV *fullname = sv_2mortal (newSV (0));
		858
		859	if (isGV (gv))
		860	gv_efullname3 (fullname, gv, 0);
		861
		862	PL_runops = RUNOPS_DEFAULT;
		863	ENTER;
		864	SAVETMPS;
		865	EXTEND (SP, 3);
		866	PUSHMARK (SP);
		867	PUSHs (&PL_sv_yes);
		868	PUSHs (fullname);
		869	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		870	PUTBACK;
		871	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		872	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		873	SPAGAIN;
		874	FREETMPS;
		875	LEAVE;
		876	PL_runops = runops_trace;
		877	}
		878
		879	oldcxix = cxstack_ix;
		880	}
		881
		882	if (cctx->flags & CC_TRACE_LINE)
		883	{
		884	dSP;
		885
		886	PL_runops = RUNOPS_DEFAULT;
		887	ENTER;
		888	SAVETMPS;
		889	EXTEND (SP, 3);
		890	PL_runops = RUNOPS_DEFAULT;
		891	PUSHMARK (SP);
		892	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		893	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		894	PUTBACK;
		895	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		896	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		897	SPAGAIN;
		898	FREETMPS;
		899	LEAVE;
		900	PL_runops = runops_trace;
		901	}
		902	}
		903	}
		904	}
		905	}
		906
		907	TAINT_NOT;
		908	return 0;
		909	}
		910
548	/* inject a fake call to Coro::State::_cctx_init into the execution */	911	/* inject a fake call to Coro::State::_cctx_init into the execution */
		912	/* _cctx_init should be careful, as it could be called at almost any time */
		913	/* during execution of a perl program */
549	static void NOINLINE	914	static void NOINLINE
550	prepare_cctx (coro_cctx *cctx)	915	cctx_prepare (pTHX_ coro_cctx *cctx)
551	{	916	{
552	dSP;	917	dSP;
553	LOGOP myop;	918	LOGOP myop;
		919
		920	PL_top_env = &PL_start_env;
		921
		922	if (cctx->flags & CC_TRACE)
		923	PL_runops = runops_trace;
554		924
555	Zero (&myop, 1, LOGOP);	925	Zero (&myop, 1, LOGOP);
556	myop.op_next = PL_op;	926	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	927	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		928
…		…
564	PL_op = (OP *)&myop;	934	PL_op = (OP *)&myop;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	935	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	936	SPAGAIN;
567	}	937	}
568		938
		939	/*
		940	* this is a _very_ stripped down perl interpreter ;)
		941	*/
569	static void	942	static void
570	coro_run (void *arg)	943	cctx_run (void *arg)
571	{	944	{
		945	dTHX;
		946
572	/* coro_run is the alternative tail of transfer(), so unlock here. */	947	/* cctx_run is the alternative tail of transfer(), so unlock here. */
573	UNLOCK;	948	UNLOCK;
574		949
575	/*	950	/* we now skip the entersub that lead to transfer() */
576	* this is a _very_ stripped down perl interpreter ;)	951	PL_op = PL_op->op_next;
577	*/
578	PL_top_env = &PL_start_env;
579		952
580	/* inject call to cctx_init */	953	/* inject a fake subroutine call to cctx_init */
581	prepare_cctx ((coro_cctx *)arg);	954	cctx_prepare (aTHX_ (coro_cctx *)arg);
582		955
583	/* somebody will hit me for both perl_run and PL_restartop */	956	/* somebody or something will hit me for both perl_run and PL_restartop */
584	PL_restartop = PL_op;	957	PL_restartop = PL_op;
585	perl_run (PL_curinterp);	958	perl_run (PL_curinterp);
586		959
587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	960	/*
588	abort ();	961	* If perl-run returns we assume exit() was being called or the coro
		962	* fell off the end, which seems to be the only valid (non-bug)
		963	* reason for perl_run to return. We try to exit by jumping to the
		964	* bootstrap-time "top" top_env, as we cannot restore the "main"
		965	* coroutine as Coro has no such concept
		966	*/
		967	PL_top_env = main_top_env;
		968	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
589	}	969	}
590		970
591	static coro_cctx *	971	static coro_cctx *
592	cctx_new ()	972	cctx_new ()
593	{	973	{
594	coro_cctx *cctx;	974	coro_cctx *cctx;
		975	void *stack_start;
		976	size_t stack_size;
595		977
596	++cctx_count;	978	++cctx_count;
597		979
598	Newz (0, cctx, 1, coro_cctx);	980	Newz (0, cctx, 1, coro_cctx);
599		981
600	#if HAVE_MMAP	982	#if HAVE_MMAP
601
602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	983	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
603	/* mmap supposedly does allocate-on-write for us */	984	/* mmap supposedly does allocate-on-write for us */
604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	985	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605		986
606	if (cctx->sptr == (void *)-1)	987	if (cctx->sptr != (void *)-1)
607	{
608	perror ("FATAL: unable to mmap stack for coroutine");
609	_exit (EXIT_FAILURE);
610	}	988	{
611
612	# if STACKGUARD	989	# if CORO_STACKGUARD
613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	990	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
614	# endif	991	# endif
		992	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		993	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		994	cctx->flags |= CC_MAPPED;
		995	}
		996	else
		997	#endif
		998	{
		999	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1000	New (0, cctx->sptr, coro_stacksize, long);
615		1001
616	#else
617
618	cctx->ssize = STACKSIZE * (long)sizeof (long);
619	New (0, cctx->sptr, STACKSIZE, long);
620
621	if (!cctx->sptr)	1002	if (!cctx->sptr)
622	{	1003	{
623	perror ("FATAL: unable to malloc stack for coroutine");	1004	perror ("FATAL: unable to allocate stack for coroutine");
624	_exit (EXIT_FAILURE);	1005	_exit (EXIT_FAILURE);
625	}	1006	}
626		1007
627	#endif	1008	stack_start = cctx->sptr;
		1009	stack_size = cctx->ssize;
		1010	}
628		1011
629	#if USE_VALGRIND	1012	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1013	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632	cctx->ssize + (char *)cctx->sptr
633	);
634	#endif
635
636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
637		1014
638	return cctx;	1015	return cctx;
639	}	1016	}
640		1017
641	static void	1018	static void
…		…
644	if (!cctx)	1021	if (!cctx)
645	return;	1022	return;
646		1023
647	--cctx_count;	1024	--cctx_count;
648		1025
649	#if USE_VALGRIND	1026	#if CORO_USE_VALGRIND
650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1027	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651	#endif	1028	#endif
652		1029
653	#if HAVE_MMAP	1030	#if HAVE_MMAP
		1031	if (cctx->flags & CC_MAPPED)
654	munmap (cctx->sptr, cctx->ssize);	1032	munmap (cctx->sptr, cctx->ssize);
		1033	else
		1034	#endif
		1035	Safefree (cctx->sptr);
		1036
		1037	Safefree (cctx);
		1038	}
		1039
		1040	/* wether this cctx should be destructed */
		1041	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1042
		1043	static coro_cctx *
		1044	cctx_get (pTHX_ int gimme)
		1045	{
		1046	while (expect_true (cctx_first[gimme]))
		1047	{
		1048	coro_cctx *cctx = cctx_first[gimme];
		1049	cctx_first[gimme] = cctx->next;
		1050	--cctx_idle[gimme];
		1051
		1052	if (expect_true (!CCTX_EXPIRED (cctx)))
		1053	return cctx;
		1054
		1055	cctx_destroy (cctx);
		1056	}
		1057
		1058	assert (!gimme);
		1059	return cctx_new ();
		1060	}
		1061
		1062	static void
		1063	cctx_put (coro_cctx *cctx, int gimme)
		1064	{
		1065	/* free another cctx if overlimit */
		1066	if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX))
		1067	{
		1068	coro_cctx *first = cctx_first[gimme];
		1069	cctx_first[gimme] = first->next;
		1070	--cctx_idle[gimme];
		1071
		1072	cctx_destroy (first);
		1073	}
		1074
		1075	++cctx_idle[gimme];
		1076	cctx->next = cctx_first[gimme];
		1077	cctx_first[gimme] = cctx;
		1078	}
		1079
		1080	/** coroutine switching *****************************************************/
		1081
		1082	static void
		1083	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1084	{
		1085	if (expect_true (prev != next))
		1086	{
		1087	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1088	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1089
		1090	if (expect_false (next->flags & CF_RUNNING))
		1091	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1092
		1093	if (expect_false (next->flags & CF_DESTROYED))
		1094	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1095
		1096	if (
		1097	#if PERL_VERSION_ATLEAST (5,9,0)
		1098	expect_false (PL_parser)
655	#else	1099	#else
656	Safefree (cctx->sptr);	1100	expect_false (PL_lex_state != LEX_NOTPARSING)
657	#endif	1101	#endif
658		1102	)
659	Safefree (cctx);	1103	croak ("Coro::State::transfer called while parsing, but this is not supported");
660	}
661
662	static coro_cctx *
663	cctx_get ()
664	{
665	coro_cctx *cctx;
666
667	if (cctx_first)
668	{
669	cctx = cctx_first;
670	cctx_first = cctx->next;
671	--cctx_idle;
672	}
673	else
674	{
675	cctx = cctx_new ();
676	PL_op = PL_op->op_next;
677	}	1104	}
678
679	return cctx;
680	}	1105	}
681		1106
682	static void	1107	/* always use the TRANSFER macro */
683	cctx_put (coro_cctx *cctx)
684	{
685	/* free another cctx if overlimit */
686	if (cctx_idle >= MAX_IDLE_CCTX)
687	{
688	coro_cctx *first = cctx_first;
689	cctx_first = first->next;
690	--cctx_idle;
691
692	assert (!first->inuse);
693	cctx_destroy (first);
694	}
695
696	++cctx_idle;
697	cctx->next = cctx_first;
698	cctx_first = cctx;
699	}
700
701	/* never call directly, always through the coro_state_transfer global variable */
702	static void NOINLINE	1108	static void NOINLINE
703	transfer (struct coro *prev, struct coro *next)	1109	transfer (pTHX_ struct coro *prev, struct coro *next)
704	{	1110	{
705	dSTACKLEVEL;	1111	dSTACKLEVEL;
706		1112
707	/* sometimes transfer is only called to set idle_sp */	1113	/* sometimes transfer is only called to set idle_sp */
708	if (!next)	1114	if (expect_false (!next))
709	{	1115	{
710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1116	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
711	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */	1117	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
712	}	1118	}
713	else if (prev != next)	1119	else if (expect_true (prev != next))
714	{	1120	{
715	coro_cctx *prev__cctx;	1121	coro_cctx *prev__cctx;
716		1122
717	if (prev->flags & CF_NEW)	1123	if (expect_false (prev->flags & CF_NEW))
718	{	1124	{
719	/* create a new empty context */	1125	/* create a new empty context */
720	Newz (0, prev->cctx, 1, coro_cctx);	1126	Newz (0, prev->cctx, 1, coro_cctx);
721	prev->cctx->inuse = 1;
722	prev->flags &= ~CF_NEW;	1127	prev->flags &= ~CF_NEW;
723	prev->flags |= CF_RUNNING;	1128	prev->flags |= CF_RUNNING;
724	}	1129	}
725		1130
726	/*TODO: must not croak here */
727	if (!prev->flags & CF_RUNNING)
728	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
729
730	if (next->flags & CF_RUNNING)
731	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
732
733	prev->flags &= ~CF_RUNNING;	1131	prev->flags &= ~CF_RUNNING;
734	next->flags |= CF_RUNNING;	1132	next->flags |= CF_RUNNING;
735		1133
736	LOCK;	1134	LOCK;
737		1135
738	if (next->flags & CF_NEW)	1136	if (expect_false (next->flags & CF_NEW))
739	{	1137	{
740	/* need to start coroutine */	1138	/* need to start coroutine */
741	next->flags &= ~CF_NEW;	1139	next->flags &= ~CF_NEW;
742	/* first get rid of the old state */	1140	/* first get rid of the old state */
743	save_perl (prev);	1141	save_perl (aTHX_ prev);
744	/* setup coroutine call */	1142	/* setup coroutine call */
745	setup_coro (next);	1143	coro_setup (aTHX_ next);
746	/* need a new stack */
747	assert (!next->cctx);
748	}	1144	}
749	else	1145	else
750	{	1146	{
751	/* coroutine already started */	1147	/* coroutine already started */
752	save_perl (prev);	1148	save_perl (aTHX_ prev);
753	load_perl (next);	1149	load_perl (aTHX_ next);
754	}	1150	}
755		1151
756	prev__cctx = prev->cctx;	1152	prev__cctx = prev->cctx;
757		1153
758	/* possibly "free" the cctx */	1154	/* possibly "free" the cctx */
759	if (prev__cctx->idle_sp == STACKLEVEL)	1155	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
760	{	1156	{
761	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1157	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
762	assert (PL_top_env == prev__cctx->top_env);	1158	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
763		1159
764	prev->cctx = 0;	1160	prev->cctx = 0;
765		1161
		1162	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1163	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1164	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1165	if (!next->cctx)
		1166	next->cctx = cctx_get (aTHX_ next->gimme);
		1167
766	cctx_put (prev__cctx);	1168	cctx_put (prev__cctx, prev->gimme);
767	prev__cctx->inuse = 0;
768	}	1169	}
769		1170
		1171	++next->usecount;
		1172
770	if (!next->cctx)	1173	if (expect_true (!next->cctx))
771	{
772	next->cctx = cctx_get ();	1174	next->cctx = cctx_get (aTHX_ next->gimme);
773	assert (!next->cctx->inuse);
774	next->cctx->inuse = 1;
775	}
776		1175
777	if (prev__cctx != next->cctx)	1176	if (expect_false (prev__cctx != next->cctx))
778	{	1177	{
779	prev__cctx->top_env = PL_top_env;	1178	prev__cctx->top_env = PL_top_env;
780	PL_top_env = next->cctx->top_env;	1179	PL_top_env = next->cctx->top_env;
781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1180	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
782	}	1181	}
783		1182
784	free_coro_mortal ();	1183	free_coro_mortal (aTHX);
785
786	UNLOCK;	1184	UNLOCK;
		1185
		1186	if (expect_false (prev->throw || next->throw))
		1187	{
		1188	struct coro *coro = SvSTATE (coro_current);
		1189
		1190	if (coro->throw)
		1191	{
		1192	SV *exception = coro->throw;
		1193	coro->throw = 0;
		1194	sv_setsv (ERRSV, exception);
		1195	croak (0);
		1196	}
		1197	}
787	}	1198	}
788	}	1199	}
789		1200
790	struct transfer_args	1201	struct transfer_args
791	{	1202	{
792	struct coro *prev, *next;	1203	struct coro *prev, *next;
793	};	1204	};
794		1205
795	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1206	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1207	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
796		1208
		1209	/** high level stuff ********************************************************/
		1210
797	static void	1211	static int
798	coro_state_destroy (struct coro *coro)	1212	coro_state_destroy (pTHX_ struct coro *coro)
799	{	1213	{
800	if (coro->refcnt--)	1214	if (coro->flags & CF_DESTROYED)
801	return;	1215	return 0;
		1216
		1217	coro->flags |= CF_DESTROYED;
		1218
		1219	if (coro->flags & CF_READY)
		1220	{
		1221	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1222	/* alternative: look through all ready queues and remove the coro */
		1223	LOCK;
		1224	--coro_nready;
		1225	UNLOCK;
		1226	}
		1227	else
		1228	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
802		1229
803	if (coro->mainstack && coro->mainstack != main_mainstack)	1230	if (coro->mainstack && coro->mainstack != main_mainstack)
804	{	1231	{
805	struct coro temp;	1232	struct coro temp;
806	Zero (&temp, 1, struct coro);
807	temp.save = CORO_SAVE_ALL;
808		1233
809	if (coro->flags & CF_RUNNING)	1234	if (coro->flags & CF_RUNNING)
810	croak ("FATAL: tried to destroy currently running coroutine");	1235	croak ("FATAL: tried to destroy currently running coroutine");
811		1236
812	save_perl (&temp);	1237	save_perl (aTHX_ &temp);
813	load_perl (coro);	1238	load_perl (aTHX_ coro);
814		1239
815	coro_destroy_stacks ();	1240	coro_destroy (aTHX_ coro);
816		1241
817	load_perl (&temp); /* this will get rid of defsv etc.. */	1242	load_perl (aTHX_ &temp);
818		1243
819	coro->mainstack = 0;	1244	coro->slot = 0;
820	}	1245	}
821		1246
822	cctx_destroy (coro->cctx);	1247	cctx_destroy (coro->cctx);
823	SvREFCNT_dec (coro->args);	1248	SvREFCNT_dec (coro->args);
824	Safefree (coro);	1249
		1250	if (coro->next) coro->next->prev = coro->prev;
		1251	if (coro->prev) coro->prev->next = coro->next;
		1252	if (coro == coro_first) coro_first = coro->next;
		1253
		1254	return 1;
825	}	1255	}
826		1256
827	static int	1257	static int
828	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1258	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
829	{	1259	{
830	struct coro *coro = (struct coro *)mg->mg_ptr;	1260	struct coro *coro = (struct coro *)mg->mg_ptr;
831	mg->mg_ptr = 0;	1261	mg->mg_ptr = 0;
832		1262
		1263	coro->hv = 0;
		1264
		1265	if (--coro->refcnt < 0)
		1266	{
833	coro_state_destroy (coro);	1267	coro_state_destroy (aTHX_ coro);
		1268	Safefree (coro);
		1269	}
834		1270
835	return 0;	1271	return 0;
836	}	1272	}
837		1273
838	static int	1274	static int
…		…
845	return 0;	1281	return 0;
846	}	1282	}
847		1283
848	static MGVTBL coro_state_vtbl = {	1284	static MGVTBL coro_state_vtbl = {
849	0, 0, 0, 0,	1285	0, 0, 0, 0,
850	coro_state_clear,	1286	coro_state_free,
851	0,	1287	0,
852	#ifdef MGf_DUP	1288	#ifdef MGf_DUP
853	coro_state_dup,	1289	coro_state_dup,
854	#else	1290	#else
855	# define MGf_DUP 0	1291	# define MGf_DUP 0
856	#endif	1292	#endif
857	};	1293	};
858		1294
859	static struct coro *
860	SvSTATE (SV *coro)
861	{
862	HV *stash;
863	MAGIC *mg;
864
865	if (SvROK (coro))
866	coro = SvRV (coro);
867
868	stash = SvSTASH (coro);
869	if (stash != coro_stash && stash != coro_state_stash)
870	{
871	/* very slow, but rare, check */
872	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
873	croak ("Coro::State object required");
874	}
875
876	mg = SvMAGIC (coro);
877	assert (mg->mg_type == PERL_MAGIC_ext);
878	return (struct coro *)mg->mg_ptr;
879	}
880
881	static void	1295	static void
882	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1296	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
883	{	1297	{
884	ta->prev = SvSTATE (prev_sv);	1298	ta->prev = SvSTATE (prev_sv);
885	ta->next = SvSTATE (next_sv);	1299	ta->next = SvSTATE (next_sv);
		1300	TRANSFER_CHECK (*ta);
886	}	1301	}
887		1302
888	static void	1303	static void
889	api_transfer (SV *prev_sv, SV *next_sv)	1304	api_transfer (SV *prev_sv, SV *next_sv)
890	{	1305	{
		1306	dTHX;
891	struct transfer_args ta;	1307	struct transfer_args ta;
892		1308
893	prepare_transfer (&ta, prev_sv, next_sv);	1309	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
894	TRANSFER (ta);	1310	TRANSFER (ta);
895	}	1311	}
896		1312
897	static int
898	api_save (SV *coro_sv, int new_save)
899	{
900	struct coro *coro = SvSTATE (coro_sv);
901	int old_save = coro->save;
902
903	if (new_save >= 0)
904	coro->save = new_save;
905
906	return old_save;
907	}
908
909	/** Coro ********************************************************************/	1313	/** Coro ********************************************************************/
910		1314
911	#define PRIO_MAX 3
912	#define PRIO_HIGH 1
913	#define PRIO_NORMAL 0
914	#define PRIO_LOW -1
915	#define PRIO_IDLE -3
916	#define PRIO_MIN -4
917
918	/* for Coro.pm */
919	static SV *coro_current;
920	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
921	static int coro_nready;
922
923	static void	1315	static void
924	coro_enq (SV *coro_sv)	1316	coro_enq (pTHX_ SV *coro_sv)
925	{	1317	{
926	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1318	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
927	coro_nready++;
928	}	1319	}
929		1320
930	static SV *	1321	static SV *
931	coro_deq (int min_prio)	1322	coro_deq (pTHX_ int min_prio)
932	{	1323	{
933	int prio = PRIO_MAX - PRIO_MIN;	1324	int prio = PRIO_MAX - PRIO_MIN;
934		1325
935	min_prio -= PRIO_MIN;	1326	min_prio -= PRIO_MIN;
936	if (min_prio < 0)	1327	if (min_prio < 0)
937	min_prio = 0;	1328	min_prio = 0;
938		1329
939	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1330	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
940	if (AvFILLp (coro_ready [prio]) >= 0)	1331	if (AvFILLp (coro_ready [prio]) >= 0)
941	{
942	coro_nready--;
943	return av_shift (coro_ready [prio]);	1332	return av_shift (coro_ready [prio]);
944	}
945		1333
946	return 0;	1334	return 0;
947	}	1335	}
948		1336
949	static int	1337	static int
950	api_ready (SV *coro_sv)	1338	api_ready (SV *coro_sv)
951	{	1339	{
		1340	dTHX;
952	struct coro *coro;	1341	struct coro *coro;
953		1342
954	if (SvROK (coro_sv))	1343	if (SvROK (coro_sv))
955	coro_sv = SvRV (coro_sv);	1344	coro_sv = SvRV (coro_sv);
956		1345
957	coro = SvSTATE (coro_sv);	1346	coro = SvSTATE (coro_sv);
958		1347
959	if (coro->flags & CF_READY)	1348	if (coro->flags & CF_READY)
960	return 0;	1349	return 0;
961		1350
962	#if 0 /* this is actually harmless */
963	if (coro->flags & CF_RUNNING)
964	croak ("Coro::ready called on currently running coroutine");
965	#endif
966
967	coro->flags |= CF_READY;	1351	coro->flags |= CF_READY;
968		1352
969	LOCK;	1353	LOCK;
970	coro_enq (SvREFCNT_inc (coro_sv));	1354	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1355	++coro_nready;
971	UNLOCK;	1356	UNLOCK;
972		1357
973	return 1;	1358	return 1;
974	}	1359	}
975		1360
976	static int	1361	static int
977	api_is_ready (SV *coro_sv)	1362	api_is_ready (SV *coro_sv)
978	{	1363	{
		1364	dTHX;
979	return !!SvSTATE (coro_sv)->flags & CF_READY;	1365	return !!(SvSTATE (coro_sv)->flags & CF_READY);
980	}	1366	}
981		1367
982	static void	1368	static void
983	prepare_schedule (struct transfer_args *ta)	1369	prepare_schedule (pTHX_ struct transfer_args *ta)
984	{	1370	{
985	SV *prev, *next;	1371	SV *prev_sv, *next_sv;
986		1372
987	for (;;)	1373	for (;;)
988	{	1374	{
989	LOCK;	1375	LOCK;
990	next = coro_deq (PRIO_MIN);	1376	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1377
		1378	/* nothing to schedule: call the idle handler */
		1379	if (expect_false (!next_sv))
		1380	{
		1381	dSP;
		1382	UNLOCK;
		1383
		1384	ENTER;
		1385	SAVETMPS;
		1386
		1387	PUSHMARK (SP);
		1388	PUTBACK;
		1389	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1390
		1391	FREETMPS;
		1392	LEAVE;
		1393	continue;
		1394	}
		1395
		1396	ta->next = SvSTATE (next_sv);
		1397
		1398	/* cannot transfer to destroyed coros, skip and look for next */
		1399	if (expect_false (ta->next->flags & CF_DESTROYED))
		1400	{
		1401	UNLOCK;
		1402	SvREFCNT_dec (next_sv);
		1403	/* coro_nready is already taken care of by destroy */
		1404	continue;
		1405	}
		1406
		1407	--coro_nready;
991	UNLOCK;	1408	UNLOCK;
992
993	if (next)
994	break;	1409	break;
995
996	{
997	dSP;
998
999	ENTER;
1000	SAVETMPS;
1001
1002	PUSHMARK (SP);
1003	PUTBACK;
1004	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1005
1006	FREETMPS;
1007	LEAVE;
1008	}	1410	}
1009	}
1010
1011	prev = SvRV (coro_current);
1012	SvRV_set (coro_current, next);
1013		1411
1014	/* free this only after the transfer */	1412	/* free this only after the transfer */
1015	LOCK;	1413	prev_sv = SvRV (coro_current);
1016	free_coro_mortal ();
1017	UNLOCK;
1018	coro_mortal = prev;
1019
1020	assert (!SvROK(prev));//D
1021	assert (!SvROK(next));//D
1022
1023	ta->prev = SvSTATE (prev);	1414	ta->prev = SvSTATE (prev_sv);
1024	ta->next = SvSTATE (next);	1415	TRANSFER_CHECK (*ta);
1025
1026	assert (ta->next->flags & CF_READY);	1416	assert (ta->next->flags & CF_READY);
1027	ta->next->flags &= ~CF_READY;	1417	ta->next->flags &= ~CF_READY;
1028	}	1418	SvRV_set (coro_current, next_sv);
1029		1419
		1420	LOCK;
		1421	free_coro_mortal (aTHX);
		1422	coro_mortal = prev_sv;
		1423	UNLOCK;
		1424	}
		1425
1030	static void	1426	static void
1031	prepare_cede (struct transfer_args *ta)	1427	prepare_cede (pTHX_ struct transfer_args *ta)
1032	{	1428	{
1033	api_ready (coro_current);	1429	api_ready (coro_current);
1034
1035	prepare_schedule (ta);	1430	prepare_schedule (aTHX_ ta);
		1431	}
		1432
		1433	static int
		1434	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1435	{
		1436	if (coro_nready)
		1437	{
		1438	SV *prev = SvRV (coro_current);
		1439	prepare_schedule (aTHX_ ta);
		1440	api_ready (prev);
		1441	return 1;
		1442	}
		1443	else
		1444	return 0;
1036	}	1445	}
1037		1446
1038	static void	1447	static void
1039	api_schedule (void)	1448	api_schedule (void)
1040	{	1449	{
		1450	dTHX;
1041	struct transfer_args ta;	1451	struct transfer_args ta;
1042		1452
1043	prepare_schedule (&ta);	1453	prepare_schedule (aTHX_ &ta);
1044	TRANSFER (ta);	1454	TRANSFER (ta);
1045	}	1455	}
1046		1456
1047	static void	1457	static int
1048	api_cede (void)	1458	api_cede (void)
1049	{	1459	{
		1460	dTHX;
1050	struct transfer_args ta;	1461	struct transfer_args ta;
1051		1462
1052	prepare_cede (&ta);	1463	prepare_cede (aTHX_ &ta);
		1464
		1465	if (expect_true (ta.prev != ta.next))
		1466	{
1053	TRANSFER (ta);	1467	TRANSFER (ta);
		1468	return 1;
		1469	}
		1470	else
		1471	return 0;
1054	}	1472	}
1055		1473
		1474	static int
		1475	api_cede_notself (void)
		1476	{
		1477	dTHX;
		1478	struct transfer_args ta;
		1479
		1480	if (prepare_cede_notself (aTHX_ &ta))
		1481	{
		1482	TRANSFER (ta);
		1483	return 1;
		1484	}
		1485	else
		1486	return 0;
		1487	}
		1488
		1489	static void
		1490	api_trace (SV *coro_sv, int flags)
		1491	{
		1492	dTHX;
		1493	struct coro *coro = SvSTATE (coro_sv);
		1494
		1495	if (flags & CC_TRACE)
		1496	{
		1497	if (!coro->cctx)
		1498	coro->cctx = cctx_new ();
		1499	else if (!(coro->cctx->flags & CC_TRACE))
		1500	croak ("cannot enable tracing on coroutine with custom stack");
		1501
		1502	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1503	}
		1504	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1505	{
		1506	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1507
		1508	if (coro->flags & CF_RUNNING)
		1509	PL_runops = RUNOPS_DEFAULT;
		1510	else
		1511	coro->slot->runops = RUNOPS_DEFAULT;
		1512	}
		1513	}
		1514
1056	MODULE = Coro::State PACKAGE = Coro::State	1515	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1057		1516
1058	PROTOTYPES: DISABLE	1517	PROTOTYPES: DISABLE
1059		1518
1060	BOOT:	1519	BOOT:
1061	{	1520	{
1062	#ifdef USE_ITHREADS	1521	#ifdef USE_ITHREADS
1063	MUTEX_INIT (&coro_mutex);	1522	MUTEX_INIT (&coro_mutex);
1064	#endif	1523	#endif
1065	BOOT_PAGESIZE;	1524	BOOT_PAGESIZE;
1066		1525
		1526	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1527	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1528
		1529	hv_sig = coro_get_hv ("SIG", TRUE);
		1530	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1531	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1532
		1533	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1534	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1535
1067	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1536	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1068		1537
		1538	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1539	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1069	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1540	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1070	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1071	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1072	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1073	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1541	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1074		1542
1075	main_mainstack = PL_mainstack;	1543	main_mainstack = PL_mainstack;
		1544	main_top_env = PL_top_env;
		1545
		1546	while (main_top_env->je_prev)
		1547	main_top_env = main_top_env->je_prev;
1076		1548
1077	coroapi.ver = CORO_API_VERSION;	1549	coroapi.ver = CORO_API_VERSION;
		1550	coroapi.rev = CORO_API_REVISION;
1078	coroapi.transfer = api_transfer;	1551	coroapi.transfer = api_transfer;
1079		1552
1080	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1553	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1081	}	1554	}
1082		1555
…		…
1087	struct coro *coro;	1560	struct coro *coro;
1088	HV *hv;	1561	HV *hv;
1089	int i;	1562	int i;
1090		1563
1091	Newz (0, coro, 1, struct coro);	1564	Newz (0, coro, 1, struct coro);
1092	coro->args = newAV ();	1565	coro->args = newAV ();
1093	coro->save = CORO_SAVE_ALL;
1094	coro->flags = CF_NEW;	1566	coro->flags = CF_NEW;
1095		1567
		1568	if (coro_first) coro_first->prev = coro;
		1569	coro->next = coro_first;
		1570	coro_first = coro;
		1571
1096	hv = newHV ();	1572	coro->hv = hv = newHV ();
1097	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1573	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1098	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1574	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1099		1575
		1576	av_extend (coro->args, items - 1);
1100	for (i = 1; i < items; i++)	1577	for (i = 1; i < items; i++)
1101	av_push (coro->args, newSVsv (ST (i)));	1578	av_push (coro->args, newSVsv (ST (i)));
1102	}	1579	}
1103	OUTPUT:	1580	OUTPUT:
1104	RETVAL	1581	RETVAL
1105		1582
1106	int	1583	# these not obviously related functions are all rolled into the same xs
1107	save (SV *coro, int new_save = -1)	1584	# function to increase chances that they all will call transfer with the same
1108	CODE:	1585	# stack offset
1109	RETVAL = api_save (coro, new_save);
1110	OUTPUT:
1111	RETVAL
1112
1113	void	1586	void
1114	_set_stacklevel (...)	1587	_set_stacklevel (...)
1115	ALIAS:	1588	ALIAS:
1116	Coro::State::transfer = 1	1589	Coro::State::transfer = 1
1117	Coro::schedule = 2	1590	Coro::schedule = 2
1118	Coro::cede = 3	1591	Coro::cede = 3
		1592	Coro::cede_notself = 4
1119	CODE:	1593	CODE:
1120	{	1594	{
1121	struct transfer_args ta;	1595	struct transfer_args ta;
1122		1596
1123	switch (ix)	1597	switch (ix)
…		…
1129		1603
1130	case 1:	1604	case 1:
1131	if (items != 2)	1605	if (items != 2)
1132	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1606	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1133		1607
1134	prepare_transfer (&ta, ST (0), ST (1));	1608	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1135	break;	1609	break;
1136		1610
1137	case 2:	1611	case 2:
1138	prepare_schedule (&ta);	1612	prepare_schedule (aTHX_ &ta);
1139	break;	1613	break;
1140		1614
1141	case 3:	1615	case 3:
1142	prepare_cede (&ta);	1616	prepare_cede (aTHX_ &ta);
		1617	break;
		1618
		1619	case 4:
		1620	if (!prepare_cede_notself (aTHX_ &ta))
		1621	XSRETURN_EMPTY;
		1622
1143	break;	1623	break;
1144	}	1624	}
1145		1625
		1626	BARRIER;
		1627	PUTBACK;
1146	TRANSFER (ta);	1628	TRANSFER (ta);
		1629	SPAGAIN; /* might be the sp of a different coroutine now */
		1630	/* be extra careful not to ever do anything after TRANSFER */
1147	}	1631	}
1148		1632
1149	void	1633	bool
1150	_clone_state_from (SV *dst, SV *src)	1634	_destroy (SV *coro_sv)
1151	CODE:	1635	CODE:
1152	{	1636	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1153	struct coro *coro_src = SvSTATE (src);	1637	OUTPUT:
1154		1638	RETVAL
1155	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1156
1157	++coro_src->refcnt;
1158	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1159	}
1160		1639
1161	void	1640	void
1162	_exit (code)	1641	_exit (code)
1163	int code	1642	int code
1164	PROTOTYPE: $	1643	PROTOTYPE: $
1165	CODE:	1644	CODE:
1166	_exit (code);	1645	_exit (code);
1167		1646
1168	int	1647	int
		1648	cctx_stacksize (int new_stacksize = 0)
		1649	CODE:
		1650	RETVAL = coro_stacksize;
		1651	if (new_stacksize)
		1652	coro_stacksize = new_stacksize;
		1653	OUTPUT:
		1654	RETVAL
		1655
		1656	int
1169	cctx_count ()	1657	cctx_count ()
1170	CODE:	1658	CODE:
1171	RETVAL = cctx_count;	1659	RETVAL = cctx_count;
1172	OUTPUT:	1660	OUTPUT:
1173	RETVAL	1661	RETVAL
1174		1662
1175	int	1663	int
1176	cctx_idle ()	1664	cctx_idle ()
1177	CODE:	1665	CODE:
1178	RETVAL = cctx_idle;	1666	RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2];
1179	OUTPUT:	1667	OUTPUT:
1180	RETVAL	1668	RETVAL
1181		1669
		1670	void
		1671	list ()
		1672	PPCODE:
		1673	{
		1674	struct coro *coro;
		1675	for (coro = coro_first; coro; coro = coro->next)
		1676	if (coro->hv)
		1677	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1678	}
		1679
		1680	void
		1681	call (Coro::State coro, SV *coderef)
		1682	ALIAS:
		1683	eval = 1
		1684	CODE:
		1685	{
		1686	if (coro->mainstack)
		1687	{
		1688	struct coro temp;
		1689
		1690	if (!(coro->flags & CF_RUNNING))
		1691	{
		1692	save_perl (aTHX_ &temp);
		1693	load_perl (aTHX_ coro);
		1694	}
		1695
		1696	{
		1697	dSP;
		1698	ENTER;
		1699	SAVETMPS;
		1700	PUTBACK;
		1701	PUSHSTACK;
		1702	PUSHMARK (SP);
		1703
		1704	if (ix)
		1705	eval_sv (coderef, 0);
		1706	else
		1707	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1708
		1709	POPSTACK;
		1710	FREETMPS;
		1711	LEAVE;
		1712	PUTBACK;
		1713	}
		1714
		1715	if (!(coro->flags & CF_RUNNING))
		1716	{
		1717	save_perl (aTHX_ coro);
		1718	load_perl (aTHX_ &temp);
		1719	}
		1720	}
		1721	}
		1722
		1723	SV *
		1724	is_ready (Coro::State coro)
		1725	PROTOTYPE: $
		1726	ALIAS:
		1727	is_ready = CF_READY
		1728	is_running = CF_RUNNING
		1729	is_new = CF_NEW
		1730	is_destroyed = CF_DESTROYED
		1731	CODE:
		1732	RETVAL = boolSV (coro->flags & ix);
		1733	OUTPUT:
		1734	RETVAL
		1735
		1736	void
		1737	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1738
		1739	SV *
		1740	has_stack (Coro::State coro)
		1741	PROTOTYPE: $
		1742	CODE:
		1743	RETVAL = boolSV (!!coro->cctx);
		1744	OUTPUT:
		1745	RETVAL
		1746
		1747	int
		1748	is_traced (Coro::State coro)
		1749	PROTOTYPE: $
		1750	CODE:
		1751	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1752	OUTPUT:
		1753	RETVAL
		1754
		1755	IV
		1756	rss (Coro::State coro)
		1757	PROTOTYPE: $
		1758	ALIAS:
		1759	usecount = 1
		1760	CODE:
		1761	switch (ix)
		1762	{
		1763	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1764	case 1: RETVAL = coro->usecount; break;
		1765	}
		1766	OUTPUT:
		1767	RETVAL
		1768
		1769
1182	MODULE = Coro::State PACKAGE = Coro	1770	MODULE = Coro::State PACKAGE = Coro
1183		1771
1184	BOOT:	1772	BOOT:
1185	{	1773	{
1186	int i;	1774	int i;
1187		1775
		1776	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1777	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1778	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1779
		1780	coro_current = coro_get_sv ("Coro::current", FALSE);
		1781	SvREADONLY_on (coro_current);
		1782
1188	coro_stash = gv_stashpv ("Coro", TRUE);	1783	coro_stash = gv_stashpv ("Coro", TRUE);
1189		1784
1190	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1785	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1191	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1786	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1192	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1787	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1193	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1788	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1194	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1789	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1195	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1790	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1196		1791
1197	coro_current = get_sv ("Coro::current", FALSE);
1198	SvREADONLY_on (coro_current);
1199
1200	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1792	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1201	coro_ready[i] = newAV ();	1793	coro_ready[i] = newAV ();
1202		1794
1203	{	1795	{
1204	SV *sv = perl_get_sv("Coro::API", 1);	1796	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1797	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1205		1798
1206	coroapi.schedule = api_schedule;	1799	coroapi.schedule = api_schedule;
1207	coroapi.save = api_save;
1208	coroapi.cede = api_cede;	1800	coroapi.cede = api_cede;
		1801	coroapi.cede_notself = api_cede_notself;
1209	coroapi.ready = api_ready;	1802	coroapi.ready = api_ready;
1210	coroapi.is_ready = api_is_ready;	1803	coroapi.is_ready = api_is_ready;
1211	coroapi.nready = &coro_nready;	1804	coroapi.nready = &coro_nready;
1212	coroapi.current = coro_current;	1805	coroapi.current = coro_current;
1213		1806
1214	GCoroAPI = &coroapi;	1807	GCoroAPI = &coroapi;
1215	sv_setiv (sv, (IV)&coroapi);	1808	sv_setiv (sv, (IV)&coroapi);
1216	SvREADONLY_on (sv);	1809	SvREADONLY_on (sv);
1217	}	1810	}
…		…
1233	RETVAL = coro->prio;	1826	RETVAL = coro->prio;
1234		1827
1235	if (items > 1)	1828	if (items > 1)
1236	{	1829	{
1237	if (ix)	1830	if (ix)
1238	newprio += coro->prio;	1831	newprio = coro->prio - newprio;
1239		1832
1240	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1833	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1241	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1834	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1242		1835
1243	coro->prio = newprio;	1836	coro->prio = newprio;
1244	}	1837	}
1245	}	1838	}
		1839	OUTPUT:
		1840	RETVAL
1246		1841
1247	SV *	1842	SV *
1248	ready (SV *self)	1843	ready (SV *self)
1249	PROTOTYPE: $	1844	PROTOTYPE: $
1250	CODE:	1845	CODE:
1251	RETVAL = boolSV (api_ready (self));	1846	RETVAL = boolSV (api_ready (self));
1252	OUTPUT:	1847	OUTPUT:
1253	RETVAL	1848	RETVAL
1254		1849
1255	SV *
1256	is_ready (SV *self)
1257	PROTOTYPE: $
1258	CODE:
1259	RETVAL = boolSV (api_is_ready (self));
1260	OUTPUT:
1261	RETVAL
1262
1263	int	1850	int
1264	nready (...)	1851	nready (...)
1265	PROTOTYPE:	1852	PROTOTYPE:
1266	CODE:	1853	CODE:
1267	RETVAL = coro_nready;	1854	RETVAL = coro_nready;
1268	OUTPUT:	1855	OUTPUT:
1269	RETVAL	1856	RETVAL
1270		1857
		1858	void
		1859	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1860	PROTOTYPE: $;$
		1861	CODE:
		1862	SvREFCNT_dec (self->throw);
		1863	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1864
		1865	# for async_pool speedup
		1866	void
		1867	_pool_1 (SV *cb)
		1868	CODE:
		1869	{
		1870	struct coro *coro = SvSTATE (coro_current);
		1871	HV *hv = (HV *)SvRV (coro_current);
		1872	AV *defav = GvAV (PL_defgv);
		1873	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1874	AV *invoke_av;
		1875	int i, len;
		1876
		1877	if (!invoke)
		1878	croak ("\3async_pool terminate\2\n");
		1879
		1880	SvREFCNT_dec (coro->saved_deffh);
		1881	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1882
		1883	hv_store (hv, "desc", sizeof ("desc") - 1,
		1884	newSVpvn (strpair ("[async_pool]")), 0);
		1885
		1886	invoke_av = (AV *)SvRV (invoke);
		1887	len = av_len (invoke_av);
		1888
		1889	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1890
		1891	if (len > 0)
		1892	{
		1893	av_fill (defav, len - 1);
		1894	for (i = 0; i < len; ++i)
		1895	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1896	}
		1897
		1898	SvREFCNT_dec (invoke);
		1899	}
		1900
		1901	void
		1902	_pool_2 (SV *cb)
		1903	CODE:
		1904	{
		1905	struct coro *coro = SvSTATE (coro_current);
		1906
		1907	sv_setsv (cb, &PL_sv_undef);
		1908
		1909	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1910	coro->saved_deffh = 0;
		1911
		1912	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1913	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1914	croak ("\3async_pool terminate\2\n");
		1915
		1916	av_clear (GvAV (PL_defgv));
		1917	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1918	newSVpvn (strpair ("[async_pool idle]")), 0);
		1919
		1920	coro->prio = 0;
		1921
		1922	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1923	api_trace (coro_current, 0);
		1924
		1925	av_push (av_async_pool, newSVsv (coro_current));
		1926	}
		1927
		1928
1271	MODULE = Coro::State PACKAGE = Coro::AIO	1929	MODULE = Coro::State PACKAGE = Coro::AIO
1272		1930
1273	SV *	1931	SV *
1274	_get_state ()	1932	_get_state ()
1275	CODE:	1933	CODE:

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