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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.130 by root, Mon Dec 25 13:25:55 2006 UTC vs.
Revision 1.221 by root, Sun Jan 13 09:47:22 2008 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	/* helper storage struct for Coro::AIO */
115	struct io_state	137	struct io_state
116	{	138	{
117	int errorno;	139	int errorno;
118	I32 laststype;	140	I32 laststype;
119	int laststatval;	141	int laststatval;
120	Stat_t statcache;	142	Stat_t statcache;
121	};	143	};
122		144
		145	static size_t coro_stacksize = CORO_STACKSIZE;
123	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
124	static AV *main_mainstack; /* used to differentiate between $main and others */	147	static AV *main_mainstack; /* used to differentiate between $main and others */
		148	static JMPENV *main_top_env;
125	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
126	static SV *coro_mortal; /* will be freed after next transfer */	150	static volatile SV *coro_mortal; /* will be freed after next transfer */
		151
		152	static GV *irsgv; /* $/ */
		153	static GV *stdoutgv; /* *STDOUT */
		154	static SV *rv_diehook;
		155	static SV *rv_warnhook;
		156	static HV *hv_sig; /* %SIG */
		157
		158	/* async_pool helper stuff */
		159	static SV *sv_pool_rss;
		160	static SV *sv_pool_size;
		161	static AV *av_async_pool;
127		162
128	static struct coro_cctx *cctx_first;	163	static struct coro_cctx *cctx_first;
129	static int cctx_count, cctx_idle;	164	static int cctx_count, cctx_idle;
		165
		166	enum {
		167	CC_MAPPED = 0x01,
		168	CC_NOREUSE = 0x02, /* throw this away after tracing */
		169	CC_TRACE = 0x04,
		170	CC_TRACE_SUB = 0x08, /* trace sub calls */
		171	CC_TRACE_LINE = 0x10, /* trace each statement */
		172	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		173	};
130		174
131	/* this is a structure representing a c-level coroutine */	175	/* this is a structure representing a c-level coroutine */
132	typedef struct coro_cctx {	176	typedef struct coro_cctx {
133	struct coro_cctx *next;	177	struct coro_cctx *next;
134		178
135	/* the stack */	179	/* the stack */
136	void *sptr;	180	void *sptr;
137	long ssize; /* positive == mmap, otherwise malloc */	181	size_t ssize;
138		182
139	/* cpu state */	183	/* cpu state */
140	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	184	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		185	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
141	JMPENV *top_env;	186	JMPENV *top_env;
142	coro_context cctx;	187	coro_context cctx;
143		188
144	int inuse;
145
146	#if USE_VALGRIND	189	#if CORO_USE_VALGRIND
147	int valgrind_id;	190	int valgrind_id;
148	#endif	191	#endif
		192	unsigned char flags;
149	} coro_cctx;	193	} coro_cctx;
150		194
151	enum {	195	enum {
152	CF_RUNNING = 0x0001, /* coroutine is running */	196	CF_RUNNING = 0x0001, /* coroutine is running */
153	CF_READY = 0x0002, /* coroutine is ready */	197	CF_READY = 0x0002, /* coroutine is ready */
154	CF_NEW = 0x0004, /* ahs never been switched to */	198	CF_NEW = 0x0004, /* has never been switched to */
		199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
155	};	200	};
		201
		202	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		203	typedef struct {
		204	SV *defsv;
		205	AV *defav;
		206	SV *errsv;
		207	SV *irsgv;
		208	#define VAR(name,type) type name;
		209	# include "state.h"
		210	#undef VAR
		211	} perl_slots;
		212
		213	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
156		214
157	/* this is a structure representing a perl-level coroutine */	215	/* this is a structure representing a perl-level coroutine */
158	struct coro {	216	struct coro {
159	/* the c coroutine allocated to this perl coroutine, if any */	217	/* the c coroutine allocated to this perl coroutine, if any */
160	coro_cctx *cctx;	218	coro_cctx *cctx;
161		219
		220	/* process data */
		221	AV *mainstack;
		222	perl_slots *slot; /* basically the saved sp */
		223
162	/* data associated with this coroutine (initial args) */	224	AV *args; /* data associated with this coroutine (initial args) */
163	AV *args;	225	int refcnt; /* coroutines are refcounted, yes */
164	int refcnt;
165	int save; /* CORO_SAVE flags */
166	int flags; /* CF_ flags */	226	int flags; /* CF_ flags */
		227	HV *hv; /* the perl hash associated with this coro, if any */
167		228
168	/* optionally saved, might be zero */	229	/* statistics */
169	AV *defav; /* @_ */	230	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		231
179	/* coro process data */	232	/* coro process data */
180	int prio;	233	int prio;
		234	SV *throw; /* exception to be thrown */
		235
		236	/* async_pool */
		237	SV *saved_deffh;
		238
		239	/* linked list */
		240	struct coro *next, *prev;
181	};	241	};
182		242
183	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
184	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
185		245
		246	/** Coro ********************************************************************/
		247
		248	#define PRIO_MAX 3
		249	#define PRIO_HIGH 1
		250	#define PRIO_NORMAL 0
		251	#define PRIO_LOW -1
		252	#define PRIO_IDLE -3
		253	#define PRIO_MIN -4
		254
		255	/* for Coro.pm */
		256	static SV *coro_current;
		257	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		258	static int coro_nready;
		259	static struct coro *coro_first;
		260
		261	/** lowlevel stuff **********************************************************/
		262
		263	static SV *
		264	coro_get_sv (pTHX_ const char *name, int create)
		265	{
		266	#if PERL_VERSION_ATLEAST (5,9,0)
		267	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		268	get_sv (name, create);
		269	#endif
		270	return get_sv (name, create);
		271	}
		272
186	static AV *	273	static AV *
		274	coro_get_av (pTHX_ const char *name, int create)
		275	{
		276	#if PERL_VERSION_ATLEAST (5,9,0)
		277	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		278	get_av (name, create);
		279	#endif
		280	return get_av (name, create);
		281	}
		282
		283	static HV *
		284	coro_get_hv (pTHX_ const char *name, int create)
		285	{
		286	#if PERL_VERSION_ATLEAST (5,9,0)
		287	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		288	get_hv (name, create);
		289	#endif
		290	return get_hv (name, create);
		291	}
		292
		293	static AV *
187	coro_clone_padlist (CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
188	{	295	{
189	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
190	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
191		298
192	newpadlist = newAV ();	299	newpadlist = newAV ();
…		…
204		311
205	return newpadlist;	312	return newpadlist;
206	}	313	}
207		314
208	static void	315	static void
209	free_padlist (AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
210	{	317	{
211	/* may be during global destruction */	318	/* may be during global destruction */
212	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
213	{	320	{
214	I32 i = AvFILLp (padlist);	321	I32 i = AvFILLp (padlist);
…		…
235	AV *padlist;	342	AV *padlist;
236	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
237		344
238	/* casting is fun. */	345	/* casting is fun. */
239	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
240	free_padlist (padlist);	347	free_padlist (aTHX_ padlist);
241
242	SvREFCNT_dec (av);
243		348
244	return 0;	349	return 0;
245	}	350	}
246		351
247	#define PERL_MAGIC_coro PERL_MAGIC_ext	352	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		353	#define CORO_MAGIC_type_state PERL_MAGIC_ext
248		354
249	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	355	static MGVTBL coro_cv_vtbl = {
		356	0, 0, 0, 0,
		357	coro_cv_free
		358	};
250		359
251	#define CORO_MAGIC(cv) \	360	#define CORO_MAGIC(sv,type) \
252	SvMAGIC (cv) \	361	SvMAGIC (sv) \
253	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	362	? SvMAGIC (sv)->mg_type == type \
254	? SvMAGIC (cv) \	363	? SvMAGIC (sv) \
255	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	364	: mg_find (sv, type) \
256	: 0	365	: 0
		366
		367	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		368	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		369
		370	static struct coro *
		371	SvSTATE_ (pTHX_ SV *coro)
		372	{
		373	HV *stash;
		374	MAGIC *mg;
		375
		376	if (SvROK (coro))
		377	coro = SvRV (coro);
		378
		379	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		380	croak ("Coro::State object required");
		381
		382	stash = SvSTASH (coro);
		383	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		384	{
		385	/* very slow, but rare, check */
		386	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		387	croak ("Coro::State object required");
		388	}
		389
		390	mg = CORO_MAGIC_state (coro);
		391	return (struct coro *)mg->mg_ptr;
		392	}
		393
		394	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
257		395
258	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
259	static void	397	static void
260	get_padlist (CV *cv)	398	get_padlist (pTHX_ CV *cv)
261	{	399	{
262	MAGIC *mg = CORO_MAGIC (cv);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
263	AV *av;	401	AV *av;
264		402
265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
267	else	405	else
268	{	406	{
269	#if PREFER_PERL_FUNCTIONS	407	#if CORO_PREFER_PERL_FUNCTIONS
270	/* this is probably cleaner, but also slower? */	408	/* this is probably cleaner, but also slower? */
271	CV *cp = Perl_cv_clone (cv);	409	CV *cp = Perl_cv_clone (cv);
272	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
273	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
274	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
275	#else	413	#else
276	CvPADLIST (cv) = coro_clone_padlist (cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
277	#endif	415	#endif
278	}	416	}
279	}	417	}
280		418
281	static void	419	static void
282	put_padlist (CV *cv)	420	put_padlist (pTHX_ CV *cv)
283	{	421	{
284	MAGIC *mg = CORO_MAGIC (cv);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
285	AV *av;	423	AV *av;
286		424
287	if (!mg)	425	if (expect_false (!mg))
288	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291	mg->mg_virtual = &vtbl_coro;
292	mg->mg_obj = (SV *)newAV ();
293	}
294		427
295	av = (AV *)mg->mg_obj;	428	av = (AV *)mg->mg_obj;
296		429
297	if (AvFILLp (av) >= AvMAX (av))	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
298	av_extend (av, AvMAX (av) + 1);	431	av_extend (av, AvMAX (av) + 1);
299		432
300	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
301	}	434	}
302		435
303	#define SB do {	436	/** load & save, init *******************************************************/
304	#define SE } while (0)
305
306	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
307		437
308	static void	438	static void
309	load_perl (Coro__State c)	439	load_perl (pTHX_ Coro__State c)
310	{	440	{
		441	perl_slots *slot = c->slot;
		442	c->slot = 0;
		443
		444	PL_mainstack = c->mainstack;
		445
		446	GvSV (PL_defgv) = slot->defsv;
		447	GvAV (PL_defgv) = slot->defav;
		448	GvSV (PL_errgv) = slot->errsv;
		449	GvSV (irsgv) = slot->irsgv;
		450
311	#define VAR(name,type) PL_ ## name = c->name;	451	#define VAR(name,type) PL_ ## name = slot->name;
312	# include "state.h"	452	# include "state.h"
313	#undef VAR	453	#undef VAR
314
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
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		454
330	{	455	{
331	dSP;	456	dSP;
		457
332	CV *cv;	458	CV *cv;
333		459
334	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
335	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
336	{	462	{
337	put_padlist (cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
338	CvDEPTH (cv) = PTR2IV (POPs);	464	CvDEPTH (cv) = PTR2IV (POPs);
339	CvPADLIST (cv) = (AV *)POPs;	465	CvPADLIST (cv) = (AV *)POPs;
340	}	466	}
341		467
342	PUTBACK;	468	PUTBACK;
343	}	469	}
344	}	470	}
345		471
346	static void	472	static void
347	save_perl (Coro__State c)	473	save_perl (pTHX_ Coro__State c)
348	{	474	{
349	{	475	{
350	dSP;	476	dSP;
351	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
355	/*	481	/*
356	* the worst thing you can imagine happens first - we have to save	482	* the worst thing you can imagine happens first - we have to save
357	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
358	*/	484	*/
359		485
360	EXTEND (SP, 3 + 1);
361	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
362	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
363	for (;;)	488	for (;;)
364	{	489	{
365	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
366	{	491	{
367	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
368		493
369	if (CxTYPE (cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
370	{	495	{
371	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
372		497
373	if (CvDEPTH (cv))	498	if (expect_true (CvDEPTH (cv)))
374	{	499	{
375	EXTEND (SP, 3);	500	EXTEND (SP, 3);
376	PUSHs ((SV *)CvPADLIST (cv));	501	PUSHs ((SV *)CvPADLIST (cv));
377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
378	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
379		504
380	CvDEPTH (cv) = 0;	505	CvDEPTH (cv) = 0;
381	get_padlist (cv);	506	get_padlist (aTHX_ cv);
382	}	507	}
383	}	508	}
384	}	509	}
385		510
386	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
387	break;	512	break;
388		513
389	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
390	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
391	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
392	}	517	}
393		518
394	PUTBACK;	519	PUTBACK;
395	}	520	}
396		521
397	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
399	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	524	if (SLOT_COUNT >= 1) CXINC;
400	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	525	if (SLOT_COUNT >= 2) CXINC;
		526	if (SLOT_COUNT >= 3) CXINC;
		527	{
		528	int i;
		529	for (i = 3; i < SLOT_COUNT; ++i)
		530	CXINC;
		531	}
		532	cxstack_ix -= SLOT_COUNT; /* undo allocation */
401		533
		534	c->mainstack = PL_mainstack;
		535
		536	{
		537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		538
		539	slot->defav = GvAV (PL_defgv);
		540	slot->defsv = DEFSV;
		541	slot->errsv = ERRSV;
		542	slot->irsgv = GvSV (irsgv);
		543
402	#define VAR(name,type)c->name = PL_ ## name;	544	#define VAR(name,type) slot->name = PL_ ## name;
403	# include "state.h"	545	# include "state.h"
404	#undef VAR	546	#undef VAR
		547	}
405	}	548	}
406		549
407	/*	550	/*
408	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
409	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
410	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
411	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
412	*/	555	*/
413	#if PREFER_PERL_FUNCTIONS	556	#if CORO_PREFER_PERL_FUNCTIONS
414	# define coro_init_stacks init_stacks	557	# define coro_init_stacks init_stacks
415	#else	558	#else
416	static void	559	static void
417	coro_init_stacks ()	560	coro_init_stacks (pTHX)
418	{	561	{
419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	562	PL_curstackinfo = new_stackinfo(32, 8);
420	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
421	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423		566
424	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
425	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427		570
428	New(50,PL_tmps_stack,128,SV*);	571	New(50,PL_tmps_stack,32,SV*);
429	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
430	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
431	PL_tmps_max = 128;	574	PL_tmps_max = 32;
432		575
433	New(54,PL_markstack,32,I32);	576	New(54,PL_markstack,16,I32);
434	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
435	PL_markstack_max = PL_markstack + 32;	578	PL_markstack_max = PL_markstack + 16;
436		579
437	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
438	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
439	#endif	582	#endif
440		583
441	New(54,PL_scopestack,32,I32);	584	New(54,PL_scopestack,8,I32);
442	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
443	PL_scopestack_max = 32;	586	PL_scopestack_max = 8;
444		587
445	New(54,PL_savestack,64,ANY);	588	New(54,PL_savestack,24,ANY);
446	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
447	PL_savestack_max = 64;	590	PL_savestack_max = 24;
448		591
449	#if !PERL_VERSION_ATLEAST (5,9,0)	592	#if !PERL_VERSION_ATLEAST (5,9,0)
450	New(54,PL_retstack,16,OP*);	593	New(54,PL_retstack,4,OP*);
451	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
452	PL_retstack_max = 16;	595	PL_retstack_max = 4;
453	#endif	596	#endif
454	}	597	}
455	#endif	598	#endif
456		599
457	/*	600	/*
458	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
459	*/	602	*/
460	static void	603	static void
461	coro_destroy_stacks ()	604	coro_destroy_stacks (pTHX)
462	{	605	{
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)	606	while (PL_curstackinfo->si_next)
477	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
478		608
479	while (PL_curstackinfo)	609	while (PL_curstackinfo)
480	{	610	{
…		…
495	#if !PERL_VERSION_ATLEAST (5,9,0)	625	#if !PERL_VERSION_ATLEAST (5,9,0)
496	Safefree (PL_retstack);	626	Safefree (PL_retstack);
497	#endif	627	#endif
498	}	628	}
499		629
		630	static size_t
		631	coro_rss (pTHX_ struct coro *coro)
		632	{
		633	size_t rss = sizeof (*coro);
		634
		635	if (coro->mainstack)
		636	{
		637	perl_slots tmp_slot;
		638	perl_slots *slot;
		639
		640	if (coro->flags & CF_RUNNING)
		641	{
		642	slot = &tmp_slot;
		643
		644	#define VAR(name,type) slot->name = PL_ ## name;
		645	# include "state.h"
		646	#undef VAR
		647	}
		648	else
		649	slot = coro->slot;
		650
		651	rss += sizeof (slot->curstackinfo);
		652	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		653	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		654	rss += slot->tmps_max * sizeof (SV *);
		655	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		656	rss += slot->scopestack_max * sizeof (I32);
		657	rss += slot->savestack_max * sizeof (ANY);
		658
		659	#if !PERL_VERSION_ATLEAST (5,9,0)
		660	rss += slot->retstack_max * sizeof (OP *);
		661	#endif
		662	}
		663
		664	return rss;
		665	}
		666
		667	/** coroutine stack handling ************************************************/
		668
		669	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		670	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		671
		672	/*
		673	* This overrides the default magic get method of %SIG elements.
		674	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		675	* and instead of tryign to save and restore the hash elements, we just provide
		676	* readback here.
		677	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		678	* not expecting this to actually change the hook. This is a potential problem
		679	* when a schedule happens then, but we ignore this.
		680	*/
		681	static int
		682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	const char *s = MgPV_nolen_const (mg);
		685
		686	if (*s == '_')
		687	{
		688	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		689	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		690	}
		691
		692	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		693	}
		694
		695	static int
		696	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		697	{
		698	const char *s = MgPV_nolen_const (mg);
		699
		700	if (*s == '_')
		701	{
		702	SV **svp = 0;
		703
		704	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		705	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		706
		707	if (svp)
		708	{
		709	SV *old = *svp;
		710	*svp = newSVsv (sv);
		711	SvREFCNT_dec (old);
		712	return;
		713	}
		714	}
		715
		716	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		717	}
		718
500	static void	719	static void
501	setup_coro (struct coro *coro)	720	coro_setup (pTHX_ struct coro *coro)
502	{	721	{
503	/*	722	/*
504	* emulate part of the perl startup here.	723	* emulate part of the perl startup here.
505	*/	724	*/
506
507	coro_init_stacks ();	725	coro_init_stacks (aTHX);
508		726
		727	PL_runops = RUNOPS_DEFAULT;
509	PL_curcop = &PL_compiling;	728	PL_curcop = &PL_compiling;
510	PL_in_eval = EVAL_NULL;	729	PL_in_eval = EVAL_NULL;
		730	PL_comppad = 0;
511	PL_curpm = 0;	731	PL_curpm = 0;
		732	PL_curpad = 0;
512	PL_localizing = 0;	733	PL_localizing = 0;
513	PL_dirty = 0;	734	PL_dirty = 0;
514	PL_restartop = 0;	735	PL_restartop = 0;
515		736
		737	/* recreate the die/warn hooks */
		738	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		739	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		740
		741	GvSV (PL_defgv) = newSV (0);
		742	GvAV (PL_defgv) = coro->args; coro->args = 0;
		743	GvSV (PL_errgv) = newSV (0);
		744	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		745	PL_rs = newSVsv (GvSV (irsgv));
		746	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		747
516	{	748	{
517	dSP;	749	dSP;
518	LOGOP myop;	750	LOGOP myop;
519		751
520	SvREFCNT_dec (GvAV (PL_defgv));
521	GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523	Zero (&myop, 1, LOGOP);	752	Zero (&myop, 1, LOGOP);
524	myop.op_next = Nullop;	753	myop.op_next = Nullop;
525	myop.op_flags = OPf_WANT_VOID;	754	myop.op_flags = OPf_WANT_VOID;
526		755
527	PUSHMARK (SP);	756	PUSHMARK (SP);
528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	757	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
529	PUTBACK;	758	PUTBACK;
530	PL_op = (OP *)&myop;	759	PL_op = (OP *)&myop;
531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	760	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532	SPAGAIN;	761	SPAGAIN;
533	}	762	}
534		763
535	ENTER; /* necessary e.g. for dounwind */	764	/* this newly created coroutine might be run on an existing cctx which most
		765	* likely was suspended in set_stacklevel, called from entersub.
		766	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		767	* so we ENTER here for symmetry
		768	*/
		769	ENTER;
536	}	770	}
537		771
538	static void	772	static void
		773	coro_destroy (pTHX_ struct coro *coro)
		774	{
		775	if (!IN_DESTRUCT)
		776	{
		777	/* restore all saved variables and stuff */
		778	LEAVE_SCOPE (0);
		779	assert (PL_tmps_floor == -1);
		780
		781	/* free all temporaries */
		782	FREETMPS;
		783	assert (PL_tmps_ix == -1);
		784
		785	/* unwind all extra stacks */
		786	POPSTACK_TO (PL_mainstack);
		787
		788	/* unwind main stack */
		789	dounwind (-1);
		790	}
		791
		792	SvREFCNT_dec (GvSV (PL_defgv));
		793	SvREFCNT_dec (GvAV (PL_defgv));
		794	SvREFCNT_dec (GvSV (PL_errgv));
		795	SvREFCNT_dec (PL_defoutgv);
		796	SvREFCNT_dec (PL_rs);
		797	SvREFCNT_dec (GvSV (irsgv));
		798
		799	SvREFCNT_dec (PL_diehook);
		800	SvREFCNT_dec (PL_warnhook);
		801
		802	SvREFCNT_dec (coro->saved_deffh);
		803	SvREFCNT_dec (coro->throw);
		804
		805	coro_destroy_stacks (aTHX);
		806	}
		807
		808	static void
539	free_coro_mortal ()	809	free_coro_mortal (pTHX)
540	{	810	{
541	if (coro_mortal)	811	if (expect_true (coro_mortal))
542	{	812	{
543	SvREFCNT_dec (coro_mortal);	813	SvREFCNT_dec (coro_mortal);
544	coro_mortal = 0;	814	coro_mortal = 0;
545	}	815	}
546	}	816	}
547		817
		818	static int
		819	runops_trace (pTHX)
		820	{
		821	COP *oldcop = 0;
		822	int oldcxix = -2;
		823	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		824	coro_cctx *cctx = coro->cctx;
		825
		826	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		827	{
		828	PERL_ASYNC_CHECK ();
		829
		830	if (cctx->flags & CC_TRACE_ALL)
		831	{
		832	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		833	{
		834	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		835	SV **bot, **top;
		836	AV *av = newAV (); /* return values */
		837	SV **cb;
		838	dSP;
		839
		840	GV *gv = CvGV (cx->blk_sub.cv);
		841	SV *fullname = sv_2mortal (newSV (0));
		842	if (isGV (gv))
		843	gv_efullname3 (fullname, gv, 0);
		844
		845	bot = PL_stack_base + cx->blk_oldsp + 1;
		846	top = cx->blk_gimme == G_ARRAY ? SP + 1
		847	: cx->blk_gimme == G_SCALAR ? bot + 1
		848	: bot;
		849
		850	av_extend (av, top - bot);
		851	while (bot < top)
		852	av_push (av, SvREFCNT_inc (*bot++));
		853
		854	PL_runops = RUNOPS_DEFAULT;
		855	ENTER;
		856	SAVETMPS;
		857	EXTEND (SP, 3);
		858	PUSHMARK (SP);
		859	PUSHs (&PL_sv_no);
		860	PUSHs (fullname);
		861	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		862	PUTBACK;
		863	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		864	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		865	SPAGAIN;
		866	FREETMPS;
		867	LEAVE;
		868	PL_runops = runops_trace;
		869	}
		870
		871	if (oldcop != PL_curcop)
		872	{
		873	oldcop = PL_curcop;
		874
		875	if (PL_curcop != &PL_compiling)
		876	{
		877	SV **cb;
		878
		879	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		880	{
		881	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		882
		883	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		884	{
		885	runops_proc_t old_runops = PL_runops;
		886	dSP;
		887	GV *gv = CvGV (cx->blk_sub.cv);
		888	SV *fullname = sv_2mortal (newSV (0));
		889
		890	if (isGV (gv))
		891	gv_efullname3 (fullname, gv, 0);
		892
		893	PL_runops = RUNOPS_DEFAULT;
		894	ENTER;
		895	SAVETMPS;
		896	EXTEND (SP, 3);
		897	PUSHMARK (SP);
		898	PUSHs (&PL_sv_yes);
		899	PUSHs (fullname);
		900	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		901	PUTBACK;
		902	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		903	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		904	SPAGAIN;
		905	FREETMPS;
		906	LEAVE;
		907	PL_runops = runops_trace;
		908	}
		909
		910	oldcxix = cxstack_ix;
		911	}
		912
		913	if (cctx->flags & CC_TRACE_LINE)
		914	{
		915	dSP;
		916
		917	PL_runops = RUNOPS_DEFAULT;
		918	ENTER;
		919	SAVETMPS;
		920	EXTEND (SP, 3);
		921	PL_runops = RUNOPS_DEFAULT;
		922	PUSHMARK (SP);
		923	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		924	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		925	PUTBACK;
		926	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		927	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		928	SPAGAIN;
		929	FREETMPS;
		930	LEAVE;
		931	PL_runops = runops_trace;
		932	}
		933	}
		934	}
		935	}
		936	}
		937
		938	TAINT_NOT;
		939	return 0;
		940	}
		941
548	/* inject a fake call to Coro::State::_cctx_init into the execution */	942	/* inject a fake call to Coro::State::_cctx_init into the execution */
		943	/* _cctx_init should be careful, as it could be called at almost any time */
		944	/* during execution of a perl program */
549	static void NOINLINE	945	static void NOINLINE
550	prepare_cctx (coro_cctx *cctx)	946	cctx_prepare (pTHX_ coro_cctx *cctx)
551	{	947	{
552	dSP;	948	dSP;
553	LOGOP myop;	949	LOGOP myop;
		950
		951	PL_top_env = &PL_start_env;
		952
		953	if (cctx->flags & CC_TRACE)
		954	PL_runops = runops_trace;
554		955
555	Zero (&myop, 1, LOGOP);	956	Zero (&myop, 1, LOGOP);
556	myop.op_next = PL_op;	957	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	958	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		959
…		…
564	PL_op = (OP *)&myop;	965	PL_op = (OP *)&myop;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	966	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	967	SPAGAIN;
567	}	968	}
568		969
		970	/*
		971	* this is a _very_ stripped down perl interpreter ;)
		972	*/
569	static void	973	static void
570	coro_run (void *arg)	974	cctx_run (void *arg)
571	{	975	{
		976	dTHX;
		977
572	/* coro_run is the alternative tail of transfer(), so unlock here. */	978	/* cctx_run is the alternative tail of transfer(), so unlock here. */
573	UNLOCK;	979	UNLOCK;
574		980
575	/*	981	/* we now skip the entersub that lead to transfer() */
576	* this is a _very_ stripped down perl interpreter ;)	982	PL_op = PL_op->op_next;
577	*/
578	PL_top_env = &PL_start_env;
579		983
580	/* inject call to cctx_init */	984	/* inject a fake subroutine call to cctx_init */
581	prepare_cctx ((coro_cctx *)arg);	985	cctx_prepare (aTHX_ (coro_cctx *)arg);
582		986
583	/* somebody will hit me for both perl_run and PL_restartop */	987	/* somebody or something will hit me for both perl_run and PL_restartop */
584	PL_restartop = PL_op;	988	PL_restartop = PL_op;
585	perl_run (PL_curinterp);	989	perl_run (PL_curinterp);
586		990
587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	991	/*
588	abort ();	992	* If perl-run returns we assume exit() was being called or the coro
		993	* fell off the end, which seems to be the only valid (non-bug)
		994	* reason for perl_run to return. We try to exit by jumping to the
		995	* bootstrap-time "top" top_env, as we cannot restore the "main"
		996	* coroutine as Coro has no such concept
		997	*/
		998	PL_top_env = main_top_env;
		999	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
589	}	1000	}
590		1001
591	static coro_cctx *	1002	static coro_cctx *
592	cctx_new ()	1003	cctx_new ()
593	{	1004	{
594	coro_cctx *cctx;	1005	coro_cctx *cctx;
		1006	void *stack_start;
		1007	size_t stack_size;
595		1008
596	++cctx_count;	1009	++cctx_count;
597		1010
598	Newz (0, cctx, 1, coro_cctx);	1011	Newz (0, cctx, 1, coro_cctx);
599		1012
600	#if HAVE_MMAP	1013	#if HAVE_MMAP
601
602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1014	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
603	/* mmap supposedly does allocate-on-write for us */	1015	/* 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);	1016	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605		1017
606	if (cctx->sptr == (void *)-1)	1018	if (cctx->sptr != (void *)-1)
607	{
608	perror ("FATAL: unable to mmap stack for coroutine");
609	_exit (EXIT_FAILURE);
610	}	1019	{
611
612	# if STACKGUARD	1020	# if CORO_STACKGUARD
613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1021	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
614	# endif	1022	# endif
		1023	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1024	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1025	cctx->flags |= CC_MAPPED;
		1026	}
		1027	else
		1028	#endif
		1029	{
		1030	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1031	New (0, cctx->sptr, coro_stacksize, long);
615		1032
616	#else
617
618	cctx->ssize = STACKSIZE * (long)sizeof (long);
619	New (0, cctx->sptr, STACKSIZE, long);
620
621	if (!cctx->sptr)	1033	if (!cctx->sptr)
622	{	1034	{
623	perror ("FATAL: unable to malloc stack for coroutine");	1035	perror ("FATAL: unable to allocate stack for coroutine");
624	_exit (EXIT_FAILURE);	1036	_exit (EXIT_FAILURE);
625	}	1037	}
626		1038
627	#endif	1039	stack_start = cctx->sptr;
		1040	stack_size = cctx->ssize;
		1041	}
628		1042
629	#if USE_VALGRIND	1043	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1044	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		1045
638	return cctx;	1046	return cctx;
639	}	1047	}
640		1048
641	static void	1049	static void
…		…
644	if (!cctx)	1052	if (!cctx)
645	return;	1053	return;
646		1054
647	--cctx_count;	1055	--cctx_count;
648		1056
649	#if USE_VALGRIND	1057	#if CORO_USE_VALGRIND
650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1058	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651	#endif	1059	#endif
652		1060
653	#if HAVE_MMAP	1061	#if HAVE_MMAP
		1062	if (cctx->flags & CC_MAPPED)
654	munmap (cctx->sptr, cctx->ssize);	1063	munmap (cctx->sptr, cctx->ssize);
655	#else	1064	else
		1065	#endif
656	Safefree (cctx->sptr);	1066	Safefree (cctx->sptr);
657	#endif
658		1067
659	Safefree (cctx);	1068	Safefree (cctx);
660	}	1069	}
661		1070
		1071	/* wether this cctx should be destructed */
		1072	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1073
662	static coro_cctx *	1074	static coro_cctx *
663	cctx_get ()	1075	cctx_get (pTHX)
664	{	1076	{
665	coro_cctx *cctx;	1077	while (expect_true (cctx_first))
666
667	if (cctx_first)
668	{	1078	{
669	cctx = cctx_first;	1079	coro_cctx *cctx = cctx_first;
670	cctx_first = cctx->next;	1080	cctx_first = cctx->next;
671	--cctx_idle;	1081	--cctx_idle;
672	}	1082
673	else	1083	if (expect_true (!CCTX_EXPIRED (cctx)))
674	{	1084	return cctx;
675	cctx = cctx_new ();	1085
676	PL_op = PL_op->op_next;	1086	cctx_destroy (cctx);
677	}	1087	}
678		1088
679	return cctx;	1089	return cctx_new ();
680	}	1090	}
681		1091
682	static void	1092	static void
683	cctx_put (coro_cctx *cctx)	1093	cctx_put (coro_cctx *cctx)
684	{	1094	{
685	/* free another cctx if overlimit */	1095	/* free another cctx if overlimit */
686	if (cctx_idle >= MAX_IDLE_CCTX)	1096	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
687	{	1097	{
688	coro_cctx *first = cctx_first;	1098	coro_cctx *first = cctx_first;
689	cctx_first = first->next;	1099	cctx_first = first->next;
690	--cctx_idle;	1100	--cctx_idle;
691		1101
692	assert (!first->inuse);
693	cctx_destroy (first);	1102	cctx_destroy (first);
694	}	1103	}
695		1104
696	++cctx_idle;	1105	++cctx_idle;
697	cctx->next = cctx_first;	1106	cctx->next = cctx_first;
698	cctx_first = cctx;	1107	cctx_first = cctx;
699	}	1108	}
700		1109
701	/* never call directly, always through the coro_state_transfer global variable */	1110	/** coroutine switching *****************************************************/
		1111
		1112	static void
		1113	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1114	{
		1115	if (expect_true (prev != next))
		1116	{
		1117	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1118	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1119
		1120	if (expect_false (next->flags & CF_RUNNING))
		1121	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1122
		1123	if (expect_false (next->flags & CF_DESTROYED))
		1124	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1125
		1126	if (
		1127	#if PERL_VERSION_ATLEAST (5,9,0)
		1128	expect_false (PL_parser)
		1129	#else
		1130	expect_false (PL_lex_state != LEX_NOTPARSING)
		1131	#endif
		1132	)
		1133	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1134	}
		1135	}
		1136
		1137	/* always use the TRANSFER macro */
702	static void NOINLINE	1138	static void NOINLINE
703	transfer (struct coro *prev, struct coro *next)	1139	transfer (pTHX_ struct coro *prev, struct coro *next)
704	{	1140	{
705	dSTACKLEVEL;	1141	dSTACKLEVEL;
		1142	static volatile int has_throw;
706		1143
707	/* sometimes transfer is only called to set idle_sp */	1144	/* sometimes transfer is only called to set idle_sp */
708	if (!next)	1145	if (expect_false (!next))
709	{	1146	{
710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1147	((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 */	1148	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
712	}	1149	}
713	else if (prev != next)	1150	else if (expect_true (prev != next))
714	{	1151	{
715	coro_cctx *prev__cctx;	1152	coro_cctx *prev__cctx;
716		1153
717	if (prev->flags & CF_NEW)	1154	if (expect_false (prev->flags & CF_NEW))
718	{	1155	{
719	/* create a new empty context */	1156	/* create a new empty context */
720	Newz (0, prev->cctx, 1, coro_cctx);	1157	Newz (0, prev->cctx, 1, coro_cctx);
721	prev->cctx->inuse = 1;
722	prev->flags &= ~CF_NEW;	1158	prev->flags &= ~CF_NEW;
723	prev->flags |= CF_RUNNING;	1159	prev->flags |= CF_RUNNING;
724	}	1160	}
725		1161
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;	1162	prev->flags &= ~CF_RUNNING;
734	next->flags |= CF_RUNNING;	1163	next->flags |= CF_RUNNING;
735		1164
736	LOCK;	1165	LOCK;
737		1166
		1167	/* first get rid of the old state */
		1168	save_perl (aTHX_ prev);
		1169
738	if (next->flags & CF_NEW)	1170	if (expect_false (next->flags & CF_NEW))
739	{	1171	{
740	/* need to start coroutine */	1172	/* need to start coroutine */
741	next->flags &= ~CF_NEW;	1173	next->flags &= ~CF_NEW;
742	/* first get rid of the old state */
743	save_perl (prev);
744	/* setup coroutine call */	1174	/* setup coroutine call */
745	setup_coro (next);	1175	coro_setup (aTHX_ next);
746	/* need a new stack */
747	assert (!next->cctx);
748	}	1176	}
749	else	1177	else
750	{
751	/* coroutine already started */
752	save_perl (prev);
753	load_perl (next);	1178	load_perl (aTHX_ next);
754	}
755		1179
756	prev__cctx = prev->cctx;	1180	prev__cctx = prev->cctx;
757		1181
758	/* possibly "free" the cctx */	1182	/* possibly "free" the cctx */
759	if (prev__cctx->idle_sp == STACKLEVEL)	1183	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
760	{	1184	{
761	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1185	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
762	assert (PL_top_env == prev__cctx->top_env);	1186	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
763		1187
764	prev->cctx = 0;	1188	prev->cctx = 0;
765		1189
		1190	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1191	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1192	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1193	if (!next->cctx)
		1194	next->cctx = cctx_get (aTHX);
		1195
766	cctx_put (prev__cctx);	1196	cctx_put (prev__cctx);
767	prev__cctx->inuse = 0;
768	}	1197	}
769		1198
		1199	++next->usecount;
		1200
770	if (!next->cctx)	1201	if (expect_true (!next->cctx))
771	{
772	next->cctx = cctx_get ();	1202	next->cctx = cctx_get (aTHX);
773	assert (!next->cctx->inuse);
774	next->cctx->inuse = 1;
775	}
776		1203
		1204	has_throw = !!next->throw;
		1205
777	if (prev__cctx != next->cctx)	1206	if (expect_false (prev__cctx != next->cctx))
778	{	1207	{
779	prev__cctx->top_env = PL_top_env;	1208	prev__cctx->top_env = PL_top_env;
780	PL_top_env = next->cctx->top_env;	1209	PL_top_env = next->cctx->top_env;
781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1210	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
782	}	1211	}
783		1212
784	free_coro_mortal ();	1213	free_coro_mortal (aTHX);
785
786	UNLOCK;	1214	UNLOCK;
		1215
		1216	if (expect_false (has_throw))
		1217	{
		1218	struct coro *coro = SvSTATE (coro_current);
		1219
		1220	if (coro->throw)
		1221	{
		1222	SV *exception = coro->throw;
		1223	coro->throw = 0;
		1224	sv_setsv (ERRSV, exception);
		1225	croak (0);
		1226	}
		1227	}
787	}	1228	}
788	}	1229	}
789		1230
790	struct transfer_args	1231	struct transfer_args
791	{	1232	{
792	struct coro *prev, *next;	1233	struct coro *prev, *next;
793	};	1234	};
794		1235
795	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1236	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1237	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
796		1238
		1239	/** high level stuff ********************************************************/
		1240
797	static void	1241	static int
798	coro_state_destroy (struct coro *coro)	1242	coro_state_destroy (pTHX_ struct coro *coro)
799	{	1243	{
800	if (coro->refcnt--)	1244	if (coro->flags & CF_DESTROYED)
801	return;	1245	return 0;
		1246
		1247	coro->flags |= CF_DESTROYED;
		1248
		1249	if (coro->flags & CF_READY)
		1250	{
		1251	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1252	/* alternative: look through all ready queues and remove the coro */
		1253	LOCK;
		1254	--coro_nready;
		1255	UNLOCK;
		1256	}
		1257	else
		1258	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
802		1259
803	if (coro->mainstack && coro->mainstack != main_mainstack)	1260	if (coro->mainstack && coro->mainstack != main_mainstack)
804	{	1261	{
805	struct coro temp;	1262	struct coro temp;
806	Zero (&temp, 1, struct coro);
807	temp.save = CORO_SAVE_ALL;
808		1263
809	if (coro->flags & CF_RUNNING)	1264	if (coro->flags & CF_RUNNING)
810	croak ("FATAL: tried to destroy currently running coroutine");	1265	croak ("FATAL: tried to destroy currently running coroutine");
811		1266
812	save_perl (&temp);	1267	save_perl (aTHX_ &temp);
813	load_perl (coro);	1268	load_perl (aTHX_ coro);
814		1269
815	coro_destroy_stacks ();	1270	coro_destroy (aTHX_ coro);
816		1271
817	load_perl (&temp); /* this will get rid of defsv etc.. */	1272	load_perl (aTHX_ &temp);
818		1273
819	coro->mainstack = 0;	1274	coro->slot = 0;
820	}	1275	}
821		1276
822	cctx_destroy (coro->cctx);	1277	cctx_destroy (coro->cctx);
823	SvREFCNT_dec (coro->args);	1278	SvREFCNT_dec (coro->args);
824	Safefree (coro);	1279
		1280	if (coro->next) coro->next->prev = coro->prev;
		1281	if (coro->prev) coro->prev->next = coro->next;
		1282	if (coro == coro_first) coro_first = coro->next;
		1283
		1284	return 1;
825	}	1285	}
826		1286
827	static int	1287	static int
828	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1288	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
829	{	1289	{
830	struct coro *coro = (struct coro *)mg->mg_ptr;	1290	struct coro *coro = (struct coro *)mg->mg_ptr;
831	mg->mg_ptr = 0;	1291	mg->mg_ptr = 0;
832		1292
		1293	coro->hv = 0;
		1294
		1295	if (--coro->refcnt < 0)
		1296	{
833	coro_state_destroy (coro);	1297	coro_state_destroy (aTHX_ coro);
		1298	Safefree (coro);
		1299	}
834		1300
835	return 0;	1301	return 0;
836	}	1302	}
837		1303
838	static int	1304	static int
…		…
845	return 0;	1311	return 0;
846	}	1312	}
847		1313
848	static MGVTBL coro_state_vtbl = {	1314	static MGVTBL coro_state_vtbl = {
849	0, 0, 0, 0,	1315	0, 0, 0, 0,
850	coro_state_clear,	1316	coro_state_free,
851	0,	1317	0,
852	#ifdef MGf_DUP	1318	#ifdef MGf_DUP
853	coro_state_dup,	1319	coro_state_dup,
854	#else	1320	#else
855	# define MGf_DUP 0	1321	# define MGf_DUP 0
856	#endif	1322	#endif
857	};	1323	};
858		1324
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	1325	static void
882	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1326	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
883	{	1327	{
884	ta->prev = SvSTATE (prev_sv);	1328	ta->prev = SvSTATE (prev_sv);
885	ta->next = SvSTATE (next_sv);	1329	ta->next = SvSTATE (next_sv);
		1330	TRANSFER_CHECK (*ta);
886	}	1331	}
887		1332
888	static void	1333	static void
889	api_transfer (SV *prev_sv, SV *next_sv)	1334	api_transfer (SV *prev_sv, SV *next_sv)
890	{	1335	{
		1336	dTHX;
891	struct transfer_args ta;	1337	struct transfer_args ta;
892		1338
893	prepare_transfer (&ta, prev_sv, next_sv);	1339	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
894	TRANSFER (ta);	1340	TRANSFER (ta);
895	}	1341	}
896		1342
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 ********************************************************************/	1343	/** Coro ********************************************************************/
910		1344
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	1345	static void
924	coro_enq (SV *coro_sv)	1346	coro_enq (pTHX_ SV *coro_sv)
925	{	1347	{
926	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1348	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
927	coro_nready++;
928	}	1349	}
929		1350
930	static SV *	1351	static SV *
931	coro_deq (int min_prio)	1352	coro_deq (pTHX)
932	{	1353	{
933	int prio = PRIO_MAX - PRIO_MIN;	1354	int prio;
934		1355
935	min_prio -= PRIO_MIN;
936	if (min_prio < 0)
937	min_prio = 0;
938
939	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1356	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
940	if (AvFILLp (coro_ready [prio]) >= 0)	1357	if (AvFILLp (coro_ready [prio]) >= 0)
941	{
942	coro_nready--;
943	return av_shift (coro_ready [prio]);	1358	return av_shift (coro_ready [prio]);
944	}
945		1359
946	return 0;	1360	return 0;
947	}	1361	}
948		1362
949	static int	1363	static int
950	api_ready (SV *coro_sv)	1364	api_ready (SV *coro_sv)
951	{	1365	{
		1366	dTHX;
952	struct coro *coro;	1367	struct coro *coro;
953		1368
954	if (SvROK (coro_sv))	1369	if (SvROK (coro_sv))
955	coro_sv = SvRV (coro_sv);	1370	coro_sv = SvRV (coro_sv);
956		1371
…		…
960	return 0;	1375	return 0;
961		1376
962	coro->flags |= CF_READY;	1377	coro->flags |= CF_READY;
963		1378
964	LOCK;	1379	LOCK;
965	coro_enq (SvREFCNT_inc (coro_sv));	1380	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1381	++coro_nready;
966	UNLOCK;	1382	UNLOCK;
967		1383
968	return 1;	1384	return 1;
969	}	1385	}
970		1386
971	static int	1387	static int
972	api_is_ready (SV *coro_sv)	1388	api_is_ready (SV *coro_sv)
973	{	1389	{
		1390	dTHX;
974	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1391	return !!(SvSTATE (coro_sv)->flags & CF_READY);
975	}	1392	}
976		1393
977	static void	1394	static void
978	prepare_schedule (struct transfer_args *ta)	1395	prepare_schedule (pTHX_ struct transfer_args *ta)
979	{	1396	{
980	SV *prev, *next;	1397	SV *prev_sv, *next_sv;
981		1398
982	for (;;)	1399	for (;;)
983	{	1400	{
984	LOCK;	1401	LOCK;
985	next = coro_deq (PRIO_MIN);	1402	next_sv = coro_deq (aTHX);
		1403
		1404	/* nothing to schedule: call the idle handler */
		1405	if (expect_false (!next_sv))
		1406	{
		1407	dSP;
		1408	UNLOCK;
		1409
		1410	ENTER;
		1411	SAVETMPS;
		1412
		1413	PUSHMARK (SP);
		1414	PUTBACK;
		1415	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1416	SPAGAIN;
		1417
		1418	FREETMPS;
		1419	LEAVE;
		1420	continue;
		1421	}
		1422
		1423	ta->next = SvSTATE (next_sv);
		1424
		1425	/* cannot transfer to destroyed coros, skip and look for next */
		1426	if (expect_false (ta->next->flags & CF_DESTROYED))
		1427	{
		1428	UNLOCK;
		1429	SvREFCNT_dec (next_sv);
		1430	/* coro_nready is already taken care of by destroy */
		1431	continue;
		1432	}
		1433
		1434	--coro_nready;
986	UNLOCK;	1435	UNLOCK;
987
988	if (next)
989	break;	1436	break;
990
991	{
992	dSP;
993
994	ENTER;
995	SAVETMPS;
996
997	PUSHMARK (SP);
998	PUTBACK;
999	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1000
1001	FREETMPS;
1002	LEAVE;
1003	}	1437	}
1004	}
1005
1006	prev = SvRV (coro_current);
1007	SvRV_set (coro_current, next);
1008		1438
1009	/* free this only after the transfer */	1439	/* free this only after the transfer */
1010	LOCK;	1440	prev_sv = SvRV (coro_current);
1011	free_coro_mortal ();
1012	UNLOCK;
1013	coro_mortal = prev;
1014
1015	assert (!SvROK(prev));//D
1016	assert (!SvROK(next));//D
1017
1018	ta->prev = SvSTATE (prev);	1441	ta->prev = SvSTATE (prev_sv);
1019	ta->next = SvSTATE (next);	1442	TRANSFER_CHECK (*ta);
1020
1021	assert (ta->next->flags & CF_READY);	1443	assert (ta->next->flags & CF_READY);
1022	ta->next->flags &= ~CF_READY;	1444	ta->next->flags &= ~CF_READY;
		1445	SvRV_set (coro_current, next_sv);
		1446
		1447	LOCK;
		1448	free_coro_mortal (aTHX);
		1449	coro_mortal = prev_sv;
		1450	UNLOCK;
1023	}	1451	}
1024		1452
1025	static void	1453	static void
1026	prepare_cede (struct transfer_args *ta)	1454	prepare_cede (pTHX_ struct transfer_args *ta)
1027	{	1455	{
1028	api_ready (coro_current);	1456	api_ready (coro_current);
1029
1030	prepare_schedule (ta);	1457	prepare_schedule (aTHX_ ta);
		1458	}
		1459
		1460	static int
		1461	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1462	{
		1463	if (coro_nready)
		1464	{
		1465	SV *prev = SvRV (coro_current);
		1466	prepare_schedule (aTHX_ ta);
		1467	api_ready (prev);
		1468	return 1;
		1469	}
		1470	else
		1471	return 0;
1031	}	1472	}
1032		1473
1033	static void	1474	static void
1034	api_schedule (void)	1475	api_schedule (void)
1035	{	1476	{
		1477	dTHX;
1036	struct transfer_args ta;	1478	struct transfer_args ta;
1037		1479
1038	prepare_schedule (&ta);	1480	prepare_schedule (aTHX_ &ta);
1039	TRANSFER (ta);	1481	TRANSFER (ta);
1040	}	1482	}
1041		1483
		1484	static int
		1485	api_cede (void)
		1486	{
		1487	dTHX;
		1488	struct transfer_args ta;
		1489
		1490	prepare_cede (aTHX_ &ta);
		1491
		1492	if (expect_true (ta.prev != ta.next))
		1493	{
		1494	TRANSFER (ta);
		1495	return 1;
		1496	}
		1497	else
		1498	return 0;
		1499	}
		1500
		1501	static int
		1502	api_cede_notself (void)
		1503	{
		1504	dTHX;
		1505	struct transfer_args ta;
		1506
		1507	if (prepare_cede_notself (aTHX_ &ta))
		1508	{
		1509	TRANSFER (ta);
		1510	return 1;
		1511	}
		1512	else
		1513	return 0;
		1514	}
		1515
1042	static void	1516	static void
1043	api_cede (void)	1517	api_trace (SV *coro_sv, int flags)
1044	{	1518	{
1045	struct transfer_args ta;	1519	dTHX;
		1520	struct coro *coro = SvSTATE (coro_sv);
1046		1521
1047	prepare_cede (&ta);	1522	if (flags & CC_TRACE)
1048	TRANSFER (ta);	1523	{
1049	}	1524	if (!coro->cctx)
		1525	coro->cctx = cctx_new ();
		1526	else if (!(coro->cctx->flags & CC_TRACE))
		1527	croak ("cannot enable tracing on coroutine with custom stack");
1050		1528
		1529	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1530	}
		1531	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1532	{
		1533	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1534
		1535	if (coro->flags & CF_RUNNING)
		1536	PL_runops = RUNOPS_DEFAULT;
		1537	else
		1538	coro->slot->runops = RUNOPS_DEFAULT;
		1539	}
		1540	}
		1541
1051	MODULE = Coro::State PACKAGE = Coro::State	1542	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1052		1543
1053	PROTOTYPES: DISABLE	1544	PROTOTYPES: DISABLE
1054		1545
1055	BOOT:	1546	BOOT:
1056	{	1547	{
1057	#ifdef USE_ITHREADS	1548	#ifdef USE_ITHREADS
1058	MUTEX_INIT (&coro_mutex);	1549	MUTEX_INIT (&coro_mutex);
1059	#endif	1550	#endif
1060	BOOT_PAGESIZE;	1551	BOOT_PAGESIZE;
1061		1552
		1553	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1554	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1555
		1556	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1557	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1558	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1559	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1560
		1561	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1562	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1563	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1564
1062	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1565	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1063		1566
		1567	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1568	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1064	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1569	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1065	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1066	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1067	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1068	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1570	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1069		1571
1070	main_mainstack = PL_mainstack;	1572	main_mainstack = PL_mainstack;
		1573	main_top_env = PL_top_env;
		1574
		1575	while (main_top_env->je_prev)
		1576	main_top_env = main_top_env->je_prev;
1071		1577
1072	coroapi.ver = CORO_API_VERSION;	1578	coroapi.ver = CORO_API_VERSION;
		1579	coroapi.rev = CORO_API_REVISION;
1073	coroapi.transfer = api_transfer;	1580	coroapi.transfer = api_transfer;
1074		1581
1075	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1582	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1076	}	1583	}
1077		1584
1078	SV *	1585	SV *
1079	new (char *klass, ...)	1586	new (char *klass, ...)
1080	CODE:	1587	CODE:
1081	{	1588	{
1082	struct coro *coro;	1589	struct coro *coro;
		1590	MAGIC *mg;
1083	HV *hv;	1591	HV *hv;
1084	int i;	1592	int i;
1085		1593
1086	Newz (0, coro, 1, struct coro);	1594	Newz (0, coro, 1, struct coro);
1087	coro->args = newAV ();	1595	coro->args = newAV ();
1088	coro->save = CORO_SAVE_ALL;
1089	coro->flags = CF_NEW;	1596	coro->flags = CF_NEW;
1090		1597
		1598	if (coro_first) coro_first->prev = coro;
		1599	coro->next = coro_first;
		1600	coro_first = coro;
		1601
1091	hv = newHV ();	1602	coro->hv = hv = newHV ();
1092	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1603	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1604	mg->mg_flags |= MGf_DUP;
1093	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1605	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1094		1606
		1607	av_extend (coro->args, items - 1);
1095	for (i = 1; i < items; i++)	1608	for (i = 1; i < items; i++)
1096	av_push (coro->args, newSVsv (ST (i)));	1609	av_push (coro->args, newSVsv (ST (i)));
1097	}	1610	}
1098	OUTPUT:	1611	OUTPUT:
1099	RETVAL	1612	RETVAL
1100		1613
1101	int	1614	# these not obviously related functions are all rolled into the same xs
1102	save (SV *coro, int new_save = -1)	1615	# function to increase chances that they all will call transfer with the same
1103	CODE:	1616	# stack offset
1104	RETVAL = api_save (coro, new_save);
1105	OUTPUT:
1106	RETVAL
1107
1108	void	1617	void
1109	_set_stacklevel (...)	1618	_set_stacklevel (...)
1110	ALIAS:	1619	ALIAS:
1111	Coro::State::transfer = 1	1620	Coro::State::transfer = 1
1112	Coro::schedule = 2	1621	Coro::schedule = 2
1113	Coro::cede = 3	1622	Coro::cede = 3
		1623	Coro::cede_notself = 4
1114	CODE:	1624	CODE:
1115	{	1625	{
1116	struct transfer_args ta;	1626	struct transfer_args ta;
1117		1627
		1628	PUTBACK;
1118	switch (ix)	1629	switch (ix)
1119	{	1630	{
1120	case 0:	1631	case 0:
1121	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1632	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1122	ta.next = 0;	1633	ta.next = 0;
…		…
1124		1635
1125	case 1:	1636	case 1:
1126	if (items != 2)	1637	if (items != 2)
1127	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1638	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1128		1639
1129	prepare_transfer (&ta, ST (0), ST (1));	1640	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1130	break;	1641	break;
1131		1642
1132	case 2:	1643	case 2:
1133	prepare_schedule (&ta);	1644	prepare_schedule (aTHX_ &ta);
1134	break;	1645	break;
1135		1646
1136	case 3:	1647	case 3:
1137	prepare_cede (&ta);	1648	prepare_cede (aTHX_ &ta);
		1649	break;
		1650
		1651	case 4:
		1652	if (!prepare_cede_notself (aTHX_ &ta))
		1653	XSRETURN_EMPTY;
		1654
1138	break;	1655	break;
1139	}	1656	}
		1657	SPAGAIN;
1140		1658
		1659	BARRIER;
		1660	PUTBACK;
1141	TRANSFER (ta);	1661	TRANSFER (ta);
		1662	SPAGAIN; /* might be the sp of a different coroutine now */
		1663	/* be extra careful not to ever do anything after TRANSFER */
1142	}	1664	}
1143		1665
1144	void	1666	bool
1145	_clone_state_from (SV *dst, SV *src)	1667	_destroy (SV *coro_sv)
1146	CODE:	1668	CODE:
1147	{	1669	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1148	struct coro *coro_src = SvSTATE (src);	1670	OUTPUT:
1149		1671	RETVAL
1150	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1151
1152	++coro_src->refcnt;
1153	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1154	}
1155		1672
1156	void	1673	void
1157	_exit (code)	1674	_exit (code)
1158	int code	1675	int code
1159	PROTOTYPE: $	1676	PROTOTYPE: $
1160	CODE:	1677	CODE:
1161	_exit (code);	1678	_exit (code);
1162		1679
1163	int	1680	int
		1681	cctx_stacksize (int new_stacksize = 0)
		1682	CODE:
		1683	RETVAL = coro_stacksize;
		1684	if (new_stacksize)
		1685	coro_stacksize = new_stacksize;
		1686	OUTPUT:
		1687	RETVAL
		1688
		1689	int
1164	cctx_count ()	1690	cctx_count ()
1165	CODE:	1691	CODE:
1166	RETVAL = cctx_count;	1692	RETVAL = cctx_count;
1167	OUTPUT:	1693	OUTPUT:
1168	RETVAL	1694	RETVAL
…		…
1172	CODE:	1698	CODE:
1173	RETVAL = cctx_idle;	1699	RETVAL = cctx_idle;
1174	OUTPUT:	1700	OUTPUT:
1175	RETVAL	1701	RETVAL
1176		1702
		1703	void
		1704	list ()
		1705	PPCODE:
		1706	{
		1707	struct coro *coro;
		1708	for (coro = coro_first; coro; coro = coro->next)
		1709	if (coro->hv)
		1710	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1711	}
		1712
		1713	void
		1714	call (Coro::State coro, SV *coderef)
		1715	ALIAS:
		1716	eval = 1
		1717	CODE:
		1718	{
		1719	if (coro->mainstack)
		1720	{
		1721	struct coro temp;
		1722
		1723	if (!(coro->flags & CF_RUNNING))
		1724	{
		1725	PUTBACK;
		1726	save_perl (aTHX_ &temp);
		1727	load_perl (aTHX_ coro);
		1728	}
		1729
		1730	{
		1731	dSP;
		1732	ENTER;
		1733	SAVETMPS;
		1734	PUTBACK;
		1735	PUSHSTACK;
		1736	PUSHMARK (SP);
		1737
		1738	if (ix)
		1739	eval_sv (coderef, 0);
		1740	else
		1741	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1742
		1743	POPSTACK;
		1744	SPAGAIN;
		1745	FREETMPS;
		1746	LEAVE;
		1747	PUTBACK;
		1748	}
		1749
		1750	if (!(coro->flags & CF_RUNNING))
		1751	{
		1752	save_perl (aTHX_ coro);
		1753	load_perl (aTHX_ &temp);
		1754	SPAGAIN;
		1755	}
		1756	}
		1757	}
		1758
		1759	SV *
		1760	is_ready (Coro::State coro)
		1761	PROTOTYPE: $
		1762	ALIAS:
		1763	is_ready = CF_READY
		1764	is_running = CF_RUNNING
		1765	is_new = CF_NEW
		1766	is_destroyed = CF_DESTROYED
		1767	CODE:
		1768	RETVAL = boolSV (coro->flags & ix);
		1769	OUTPUT:
		1770	RETVAL
		1771
		1772	void
		1773	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1774
		1775	SV *
		1776	has_stack (Coro::State coro)
		1777	PROTOTYPE: $
		1778	CODE:
		1779	RETVAL = boolSV (!!coro->cctx);
		1780	OUTPUT:
		1781	RETVAL
		1782
		1783	int
		1784	is_traced (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	IV
		1792	rss (Coro::State coro)
		1793	PROTOTYPE: $
		1794	ALIAS:
		1795	usecount = 1
		1796	CODE:
		1797	switch (ix)
		1798	{
		1799	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1800	case 1: RETVAL = coro->usecount; break;
		1801	}
		1802	OUTPUT:
		1803	RETVAL
		1804
		1805
1177	MODULE = Coro::State PACKAGE = Coro	1806	MODULE = Coro::State PACKAGE = Coro
1178		1807
1179	BOOT:	1808	BOOT:
1180	{	1809	{
1181	int i;	1810	int i;
1182		1811
		1812	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1813	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1814	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1815
		1816	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1817	SvREADONLY_on (coro_current);
		1818
1183	coro_stash = gv_stashpv ("Coro", TRUE);	1819	coro_stash = gv_stashpv ("Coro", TRUE);
1184		1820
1185	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1821	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1186	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1822	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1187	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1823	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1188	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1824	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1189	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1825	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1190	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1826	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1191		1827
1192	coro_current = get_sv ("Coro::current", FALSE);
1193	SvREADONLY_on (coro_current);
1194
1195	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1828	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1196	coro_ready[i] = newAV ();	1829	coro_ready[i] = newAV ();
1197		1830
1198	{	1831	{
1199	SV *sv = perl_get_sv("Coro::API", 1);	1832	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1833	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1200		1834
1201	coroapi.schedule = api_schedule;	1835	coroapi.schedule = api_schedule;
1202	coroapi.save = api_save;
1203	coroapi.cede = api_cede;	1836	coroapi.cede = api_cede;
		1837	coroapi.cede_notself = api_cede_notself;
1204	coroapi.ready = api_ready;	1838	coroapi.ready = api_ready;
1205	coroapi.is_ready = api_is_ready;	1839	coroapi.is_ready = api_is_ready;
1206	coroapi.nready = &coro_nready;	1840	coroapi.nready = &coro_nready;
1207	coroapi.current = coro_current;	1841	coroapi.current = coro_current;
1208		1842
1209	GCoroAPI = &coroapi;	1843	GCoroAPI = &coroapi;
1210	sv_setiv (sv, (IV)&coroapi);	1844	sv_setiv (sv, (IV)&coroapi);
1211	SvREADONLY_on (sv);	1845	SvREADONLY_on (sv);
1212	}	1846	}
…		…
1247	CODE:	1881	CODE:
1248	RETVAL = boolSV (api_ready (self));	1882	RETVAL = boolSV (api_ready (self));
1249	OUTPUT:	1883	OUTPUT:
1250	RETVAL	1884	RETVAL
1251		1885
1252	SV *
1253	is_ready (SV *self)
1254	PROTOTYPE: $
1255	CODE:
1256	RETVAL = boolSV (api_is_ready (self));
1257	OUTPUT:
1258	RETVAL
1259
1260	int	1886	int
1261	nready (...)	1887	nready (...)
1262	PROTOTYPE:	1888	PROTOTYPE:
1263	CODE:	1889	CODE:
1264	RETVAL = coro_nready;	1890	RETVAL = coro_nready;
1265	OUTPUT:	1891	OUTPUT:
1266	RETVAL	1892	RETVAL
1267		1893
		1894	void
		1895	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1896	PROTOTYPE: $;$
		1897	CODE:
		1898	SvREFCNT_dec (self->throw);
		1899	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1900
		1901	# for async_pool speedup
		1902	void
		1903	_pool_1 (SV *cb)
		1904	CODE:
		1905	{
		1906	struct coro *coro = SvSTATE (coro_current);
		1907	HV *hv = (HV *)SvRV (coro_current);
		1908	AV *defav = GvAV (PL_defgv);
		1909	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1910	AV *invoke_av;
		1911	int i, len;
		1912
		1913	if (!invoke)
		1914	{
		1915	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1916	croak ("\3async_pool terminate\2\n");
		1917	}
		1918
		1919	SvREFCNT_dec (coro->saved_deffh);
		1920	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1921
		1922	hv_store (hv, "desc", sizeof ("desc") - 1,
		1923	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1924
		1925	invoke_av = (AV *)SvRV (invoke);
		1926	len = av_len (invoke_av);
		1927
		1928	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1929
		1930	if (len > 0)
		1931	{
		1932	av_fill (defav, len - 1);
		1933	for (i = 0; i < len; ++i)
		1934	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1935	}
		1936
		1937	SvREFCNT_dec (invoke);
		1938	}
		1939
		1940	void
		1941	_pool_2 (SV *cb)
		1942	CODE:
		1943	{
		1944	struct coro *coro = SvSTATE (coro_current);
		1945
		1946	sv_setsv (cb, &PL_sv_undef);
		1947
		1948	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1949	coro->saved_deffh = 0;
		1950
		1951	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1952	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1953	{
		1954	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1955	croak ("\3async_pool terminate\2\n");
		1956	}
		1957
		1958	av_clear (GvAV (PL_defgv));
		1959	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1961
		1962	coro->prio = 0;
		1963
		1964	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1965	api_trace (coro_current, 0);
		1966
		1967	av_push (av_async_pool, newSVsv (coro_current));
		1968	}
		1969
		1970
1268	MODULE = Coro::State PACKAGE = Coro::AIO	1971	MODULE = Coro::State PACKAGE = Coro::AIO
1269		1972
1270	SV *	1973	SV *
1271	_get_state ()	1974	_get_state ()
1272	CODE:	1975	CODE:

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