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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.139 by root, Sun Jan 14 21:13:41 2007 UTC vs.
Revision 1.216 by root, Wed Nov 14 10:24:14 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#include <stdio.h>	12	#include <stdio.h>
10	#include <errno.h>	13	#include <errno.h>
11	#include <assert.h>	14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
12		16
13	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
14	# include <unistd.h>	18	# include <unistd.h>
15	# include <sys/mman.h>	19	# include <sys/mman.h>
16	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
31	#else	35	#else
32	# define PAGESIZE 0	36	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
34	#endif	38	#endif
35		39
36	#if USE_VALGRIND	40	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
38	#endif	45	#endif
39		46
40	/* the maximum number of idle cctx that will be pooled */	47	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	48	#define MAX_IDLE_CCTX 8
42		49
…		…
70	/* 5.8.7 */	77	/* 5.8.7 */
71	#ifndef SvRV_set	78	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	79	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	80	#endif
74		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
		89
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	91	# undef CORO_STACKGUARD
77	#endif	92	#endif
78		93
79	#ifndef STACKGUARD	94	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	95	# define CORO_STACKGUARD 0
81	#endif	96	#endif
82		97
83	/* prefer perl internal functions over our own? */	98	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	100	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	101	#endif
87		102
88	/* The next macro should declare a variable stacklevel that contains and approximation	103	/* The next macros try to return the current stack pointer, in an as
89	* to the current C stack pointer. Its property is that it changes with each call	104	* portable way as possible. */
90	* and should be unique. */
91	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
92	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
93		107
94	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
95		109
96	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
97	# define attribute(x) __attribute__(x)	111	# define attribute(x) __attribute__(x)
98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
99	#else	114	#else
100	# define attribute(x)	115	# define attribute(x)
101	# define BARRIER	116	# define BARRIER
		117	# define expect(expr,value) (expr)
102	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
103		122
104	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
105		124
106	#include "CoroAPI.h"	125	#include "CoroAPI.h"
107		126
…		…
121	I32 laststype;	140	I32 laststype;
122	int laststatval;	141	int laststatval;
123	Stat_t statcache;	142	Stat_t statcache;
124	};	143	};
125		144
		145	static size_t coro_stacksize = CORO_STACKSIZE;
126	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
127	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;
128	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
129	static SV *coro_mortal; /* will be freed after next transfer */	150	static SV *coro_mortal; /* will be freed after next transfer */
130		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;
		162
131	static struct coro_cctx *cctx_first;	163	static struct coro_cctx *cctx_first;
132	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	};
133		174
134	/* this is a structure representing a c-level coroutine */	175	/* this is a structure representing a c-level coroutine */
135	typedef struct coro_cctx {	176	typedef struct coro_cctx {
136	struct coro_cctx *next;	177	struct coro_cctx *next;
137		178
138	/* the stack */	179	/* the stack */
139	void *sptr;	180	void *sptr;
140	long ssize; /* positive == mmap, otherwise malloc */	181	size_t ssize;
141		182
142	/* cpu state */	183	/* cpu state */
143	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	184	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	185	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145	JMPENV *top_env;	186	JMPENV *top_env;
146	coro_context cctx;	187	coro_context cctx;
147		188
148	int inuse;
149
150	#if USE_VALGRIND	189	#if CORO_USE_VALGRIND
151	int valgrind_id;	190	int valgrind_id;
152	#endif	191	#endif
		192	unsigned char flags;
153	} coro_cctx;	193	} coro_cctx;
154		194
155	enum {	195	enum {
156	CF_RUNNING = 0x0001, /* coroutine is running */	196	CF_RUNNING = 0x0001, /* coroutine is running */
157	CF_READY = 0x0002, /* coroutine is ready */	197	CF_READY = 0x0002, /* coroutine is ready */
158	CF_NEW = 0x0004, /* has never been switched to */	198	CF_NEW = 0x0004, /* has never been switched to */
159	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160	};	200	};
161		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))
		214
162	/* this is a structure representing a perl-level coroutine */	215	/* this is a structure representing a perl-level coroutine */
163	struct coro {	216	struct coro {
164	/* the c coroutine allocated to this perl coroutine, if any */	217	/* the c coroutine allocated to this perl coroutine, if any */
165	coro_cctx *cctx;	218	coro_cctx *cctx;
166		219
		220	/* process data */
		221	AV *mainstack;
		222	perl_slots *slot; /* basically the saved sp */
		223
167	/* data associated with this coroutine (initial args) */	224	AV *args; /* data associated with this coroutine (initial args) */
168	AV *args;	225	int refcnt; /* coroutines are refcounted, yes */
169	int refcnt;
170	int save; /* CORO_SAVE flags */
171	int flags; /* CF_ flags */	226	int flags; /* CF_ flags */
		227	HV *hv; /* the perl hash associated with this coro, if any */
172		228
173	/* optionally saved, might be zero */	229	/* statistics */
174	AV *defav; /* @_ */	230	int usecount; /* number of transfers to this coro */
175	SV *defsv; /* $_ */
176	SV *errsv; /* $@ */
177	SV *irssv; /* $/ */
178	SV *irssv_sv; /* real $/ cache */
179
180	#define VAR(name,type) type name;
181	# include "state.h"
182	#undef VAR
183		231
184	/* coro process data */	232	/* coro process data */
185	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;
186	};	241	};
187		242
188	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
189	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
190		245
…		…
199		254
200	/* for Coro.pm */	255	/* for Coro.pm */
201	static SV *coro_current;	256	static SV *coro_current;
202	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	257	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
203	static int coro_nready;	258	static int coro_nready;
		259	static struct coro *coro_first;
204		260
205	/** lowlevel stuff **********************************************************/	261	/** lowlevel stuff **********************************************************/
206		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
207	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 *
208	coro_clone_padlist (CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
209	{	295	{
210	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
211	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
212		298
213	newpadlist = newAV ();	299	newpadlist = newAV ();
…		…
225		311
226	return newpadlist;	312	return newpadlist;
227	}	313	}
228		314
229	static void	315	static void
230	free_padlist (AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
231	{	317	{
232	/* may be during global destruction */	318	/* may be during global destruction */
233	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
234	{	320	{
235	I32 i = AvFILLp (padlist);	321	I32 i = AvFILLp (padlist);
…		…
256	AV *padlist;	342	AV *padlist;
257	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
258		344
259	/* casting is fun. */	345	/* casting is fun. */
260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261	free_padlist (padlist);	347	free_padlist (aTHX_ padlist);
262
263	SvREFCNT_dec (av);
264		348
265	return 0;	349	return 0;
266	}	350	}
267		351
268	#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
269		354
270	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	};
271		359
272	#define CORO_MAGIC(cv) \	360	#define CORO_MAGIC(sv,type) \
273	SvMAGIC (cv) \	361	SvMAGIC (sv) \
274	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	362	? SvMAGIC (sv)->mg_type == type \
275	? SvMAGIC (cv) \	363	? SvMAGIC (sv) \
276	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	364	: mg_find (sv, type) \
277	: 0	365	: 0
278		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))
		395
279	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
280	static void	397	static void
281	get_padlist (CV *cv)	398	get_padlist (pTHX_ CV *cv)
282	{	399	{
283	MAGIC *mg = CORO_MAGIC (cv);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
284	AV *av;	401	AV *av;
285		402
286	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
287	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288	else	405	else
289	{	406	{
290	#if PREFER_PERL_FUNCTIONS	407	#if CORO_PREFER_PERL_FUNCTIONS
291	/* this is probably cleaner, but also slower? */	408	/* this is probably cleaner, but also slower? */
292	CV *cp = Perl_cv_clone (cv);	409	CV *cp = Perl_cv_clone (cv);
293	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
294	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
295	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
296	#else	413	#else
297	CvPADLIST (cv) = coro_clone_padlist (cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
298	#endif	415	#endif
299	}	416	}
300	}	417	}
301		418
302	static void	419	static void
303	put_padlist (CV *cv)	420	put_padlist (pTHX_ CV *cv)
304	{	421	{
305	MAGIC *mg = CORO_MAGIC (cv);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
306	AV *av;	423	AV *av;
307		424
308	if (!mg)	425	if (expect_false (!mg))
309	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
310	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
311	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
312	mg->mg_virtual = &vtbl_coro;
313	mg->mg_obj = (SV *)newAV ();
314	}
315		427
316	av = (AV *)mg->mg_obj;	428	av = (AV *)mg->mg_obj;
317		429
318	if (AvFILLp (av) >= AvMAX (av))	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
319	av_extend (av, AvMAX (av) + 1);	431	av_extend (av, AvMAX (av) + 1);
320		432
321	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
322	}	434	}
323		435
324	/** load & save, init *******************************************************/	436	/** load & save, init *******************************************************/
325		437
326	#define SB do {
327	#define SE } while (0)
328
329	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
330
331	static void	438	static void
332	load_perl (Coro__State c)	439	load_perl (pTHX_ Coro__State c)
333	{	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
334	#define VAR(name,type) PL_ ## name = c->name;	451	#define VAR(name,type) PL_ ## name = slot->name;
335	# include "state.h"	452	# include "state.h"
336	#undef VAR	453	#undef VAR
337
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341	if (c->irssv)
342	{
343	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
344	SvREFCNT_dec (c->irssv);
345	else
346	{
347	REPLACE_SV (PL_rs, c->irssv);
348	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349	sv_setsv (c->irssv_sv, PL_rs);
350	}
351	}
352		454
353	{	455	{
354	dSP;	456	dSP;
		457
355	CV *cv;	458	CV *cv;
356		459
357	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
358	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
359	{	462	{
360	put_padlist (cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
361	CvDEPTH (cv) = PTR2IV (POPs);	464	CvDEPTH (cv) = PTR2IV (POPs);
362	CvPADLIST (cv) = (AV *)POPs;	465	CvPADLIST (cv) = (AV *)POPs;
363	}	466	}
364		467
365	PUTBACK;	468	PUTBACK;
366	}	469	}
367	}	470	}
368		471
369	static void	472	static void
370	save_perl (Coro__State c)	473	save_perl (pTHX_ Coro__State c)
371	{	474	{
372	{	475	{
373	dSP;	476	dSP;
374	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
375	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
378	/*	481	/*
379	* 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
380	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
381	*/	484	*/
382		485
383	EXTEND (SP, 3 + 1);
384	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
385	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
386	for (;;)	488	for (;;)
387	{	489	{
388	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
389	{	491	{
390	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
391		493
392	if (CxTYPE (cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
393	{	495	{
394	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
395		497
396	if (CvDEPTH (cv))	498	if (expect_true (CvDEPTH (cv)))
397	{	499	{
398	EXTEND (SP, 3);	500	EXTEND (SP, 3);
399	PUSHs ((SV *)CvPADLIST (cv));	501	PUSHs ((SV *)CvPADLIST (cv));
400	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
401	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
402		504
403	CvDEPTH (cv) = 0;	505	CvDEPTH (cv) = 0;
404	get_padlist (cv);	506	get_padlist (aTHX_ cv);
405	}	507	}
406	}	508	}
407	}	509	}
408		510
409	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
410	break;	512	break;
411		513
412	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
413	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
414	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
415	}	517	}
416		518
417	PUTBACK;	519	PUTBACK;
418	}	520	}
419		521
420	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 */
421	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
422	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	524	if (SLOT_COUNT >= 1) CXINC;
423	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 */
424		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
425	#define VAR(name,type)c->name = PL_ ## name;	544	#define VAR(name,type) slot->name = PL_ ## name;
426	# include "state.h"	545	# include "state.h"
427	#undef VAR	546	#undef VAR
		547	}
428	}	548	}
429		549
430	/*	550	/*
431	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
432	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
433	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
434	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
435	*/	555	*/
436	#if PREFER_PERL_FUNCTIONS	556	#if CORO_PREFER_PERL_FUNCTIONS
437	# define coro_init_stacks init_stacks	557	# define coro_init_stacks init_stacks
438	#else	558	#else
439	static void	559	static void
440	coro_init_stacks ()	560	coro_init_stacks (pTHX)
441	{	561	{
442	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	562	PL_curstackinfo = new_stackinfo(32, 8);
443	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
444	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
445	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
446		566
447	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
448	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
449	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
450		570
451	New(50,PL_tmps_stack,128,SV*);	571	New(50,PL_tmps_stack,32,SV*);
452	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
453	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
454	PL_tmps_max = 128;	574	PL_tmps_max = 32;
455		575
456	New(54,PL_markstack,32,I32);	576	New(54,PL_markstack,16,I32);
457	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
458	PL_markstack_max = PL_markstack + 32;	578	PL_markstack_max = PL_markstack + 16;
459		579
460	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
461	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
462	#endif	582	#endif
463		583
464	New(54,PL_scopestack,32,I32);	584	New(54,PL_scopestack,8,I32);
465	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
466	PL_scopestack_max = 32;	586	PL_scopestack_max = 8;
467		587
468	New(54,PL_savestack,64,ANY);	588	New(54,PL_savestack,24,ANY);
469	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
470	PL_savestack_max = 64;	590	PL_savestack_max = 24;
471		591
472	#if !PERL_VERSION_ATLEAST (5,9,0)	592	#if !PERL_VERSION_ATLEAST (5,9,0)
473	New(54,PL_retstack,16,OP*);	593	New(54,PL_retstack,4,OP*);
474	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
475	PL_retstack_max = 16;	595	PL_retstack_max = 4;
476	#endif	596	#endif
477	}	597	}
478	#endif	598	#endif
479		599
480	/*	600	/*
481	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
482	*/	602	*/
483	static void	603	static void
484	coro_destroy_stacks ()	604	coro_destroy_stacks (pTHX)
485	{	605	{
486	if (!IN_DESTRUCT)
487	{
488	/* restore all saved variables and stuff */
489	LEAVE_SCOPE (0);
490	assert (PL_tmps_floor == -1);
491
492	/* free all temporaries */
493	FREETMPS;
494	assert (PL_tmps_ix == -1);
495
496	/* unwind all extra stacks */
497	POPSTACK_TO (PL_mainstack);
498
499	/* unwind main stack */
500	dounwind (-1);
501	}
502
503	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
505		608
506	while (PL_curstackinfo)	609	while (PL_curstackinfo)
507	{	610	{
…		…
522	#if !PERL_VERSION_ATLEAST (5,9,0)	625	#if !PERL_VERSION_ATLEAST (5,9,0)
523	Safefree (PL_retstack);	626	Safefree (PL_retstack);
524	#endif	627	#endif
525	}	628	}
526		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
527	/** coroutine stack handling ************************************************/	667	/** coroutine stack handling ************************************************/
528		668
		669	#if 0
		670	static int (*orig_sigelem_get) (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	*/
529	static void	681	static int
530	setup_coro (struct coro *coro)	682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	return orig_sigelem_get (aTHX_ sv, mg);
		685	const char *s = MgPV_nolen_const (mg);
		686
		687	if (*s == '_')
		688	{
		689	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		690	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		691	}
		692
		693	return orig_sigelem_get (aTHX_ sv, mg);
		694	}
		695	#endif
		696
		697	static void
		698	coro_setup (pTHX_ struct coro *coro)
531	{	699	{
532	/*	700	/*
533	* emulate part of the perl startup here.	701	* emulate part of the perl startup here.
534	*/	702	*/
535
536	coro_init_stacks ();	703	coro_init_stacks (aTHX);
537		704
		705	PL_runops = RUNOPS_DEFAULT;
538	PL_curcop = &PL_compiling;	706	PL_curcop = &PL_compiling;
539	PL_in_eval = EVAL_NULL;	707	PL_in_eval = EVAL_NULL;
		708	PL_comppad = 0;
540	PL_curpm = 0;	709	PL_curpm = 0;
		710	PL_curpad = 0;
541	PL_localizing = 0;	711	PL_localizing = 0;
542	PL_dirty = 0;	712	PL_dirty = 0;
543	PL_restartop = 0;	713	PL_restartop = 0;
544		714
		715	/* recreate the die/warn hooks */
		716	PL_diehook = 0;
		717	hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
		718	PL_diehook = SvREFCNT_inc (rv_diehook);
		719
		720	PL_warnhook = 0;
		721	hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
		722	PL_warnhook = SvREFCNT_inc (rv_warnhook);
		723
		724	GvSV (PL_defgv) = newSV (0);
		725	GvAV (PL_defgv) = coro->args; coro->args = 0;
		726	GvSV (PL_errgv) = newSV (0);
		727	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		728	PL_rs = newSVsv (GvSV (irsgv));
		729	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		730
545	{	731	{
546	dSP;	732	dSP;
547	LOGOP myop;	733	LOGOP myop;
548		734
549	SvREFCNT_dec (GvAV (PL_defgv));
550	GvAV (PL_defgv) = coro->args; coro->args = 0;
551
552	Zero (&myop, 1, LOGOP);	735	Zero (&myop, 1, LOGOP);
553	myop.op_next = Nullop;	736	myop.op_next = Nullop;
554	myop.op_flags = OPf_WANT_VOID;	737	myop.op_flags = OPf_WANT_VOID;
555		738
556	PUSHMARK (SP);	739	PUSHMARK (SP);
557	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	740	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
558	PUTBACK;	741	PUTBACK;
559	PL_op = (OP *)&myop;	742	PL_op = (OP *)&myop;
560	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	743	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561	SPAGAIN;	744	SPAGAIN;
562	}	745	}
563		746
564	ENTER; /* necessary e.g. for dounwind */	747	/* this newly created coroutine might be run on an existing cctx which most
		748	* likely was suspended in set_stacklevel, called from entersub.
		749	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		750	* so we ENTER here for symmetry
		751	*/
		752	ENTER;
565	}	753	}
566		754
567	static void	755	static void
		756	coro_destroy (pTHX_ struct coro *coro)
		757	{
		758	if (!IN_DESTRUCT)
		759	{
		760	/* restore all saved variables and stuff */
		761	LEAVE_SCOPE (0);
		762	assert (PL_tmps_floor == -1);
		763
		764	/* free all temporaries */
		765	FREETMPS;
		766	assert (PL_tmps_ix == -1);
		767
		768	/* unwind all extra stacks */
		769	POPSTACK_TO (PL_mainstack);
		770
		771	/* unwind main stack */
		772	dounwind (-1);
		773	}
		774
		775	SvREFCNT_dec (GvSV (PL_defgv));
		776	SvREFCNT_dec (GvAV (PL_defgv));
		777	SvREFCNT_dec (GvSV (PL_errgv));
		778	SvREFCNT_dec (PL_defoutgv);
		779	SvREFCNT_dec (PL_rs);
		780	SvREFCNT_dec (GvSV (irsgv));
		781
		782	SvREFCNT_dec (PL_diehook);
		783	SvREFCNT_dec (PL_warnhook);
		784
		785	SvREFCNT_dec (coro->saved_deffh);
		786	SvREFCNT_dec (coro->throw);
		787
		788	coro_destroy_stacks (aTHX);
		789	}
		790
		791	static void
568	free_coro_mortal ()	792	free_coro_mortal (pTHX)
569	{	793	{
570	if (coro_mortal)	794	if (expect_true (coro_mortal))
571	{	795	{
572	SvREFCNT_dec (coro_mortal);	796	SvREFCNT_dec (coro_mortal);
573	coro_mortal = 0;	797	coro_mortal = 0;
574	}	798	}
575	}	799	}
576		800
		801	static int
		802	runops_trace (pTHX)
		803	{
		804	COP *oldcop = 0;
		805	int oldcxix = -2;
		806	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		807	coro_cctx *cctx = coro->cctx;
		808
		809	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		810	{
		811	PERL_ASYNC_CHECK ();
		812
		813	if (cctx->flags & CC_TRACE_ALL)
		814	{
		815	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		816	{
		817	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		818	SV **bot, **top;
		819	AV *av = newAV (); /* return values */
		820	SV **cb;
		821	dSP;
		822
		823	GV *gv = CvGV (cx->blk_sub.cv);
		824	SV *fullname = sv_2mortal (newSV (0));
		825	if (isGV (gv))
		826	gv_efullname3 (fullname, gv, 0);
		827
		828	bot = PL_stack_base + cx->blk_oldsp + 1;
		829	top = cx->blk_gimme == G_ARRAY ? SP + 1
		830	: cx->blk_gimme == G_SCALAR ? bot + 1
		831	: bot;
		832
		833	av_extend (av, top - bot);
		834	while (bot < top)
		835	av_push (av, SvREFCNT_inc (*bot++));
		836
		837	PL_runops = RUNOPS_DEFAULT;
		838	ENTER;
		839	SAVETMPS;
		840	EXTEND (SP, 3);
		841	PUSHMARK (SP);
		842	PUSHs (&PL_sv_no);
		843	PUSHs (fullname);
		844	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		845	PUTBACK;
		846	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		847	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		848	SPAGAIN;
		849	FREETMPS;
		850	LEAVE;
		851	PL_runops = runops_trace;
		852	}
		853
		854	if (oldcop != PL_curcop)
		855	{
		856	oldcop = PL_curcop;
		857
		858	if (PL_curcop != &PL_compiling)
		859	{
		860	SV **cb;
		861
		862	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		863	{
		864	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		865
		866	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		867	{
		868	runops_proc_t old_runops = PL_runops;
		869	dSP;
		870	GV *gv = CvGV (cx->blk_sub.cv);
		871	SV *fullname = sv_2mortal (newSV (0));
		872
		873	if (isGV (gv))
		874	gv_efullname3 (fullname, gv, 0);
		875
		876	PL_runops = RUNOPS_DEFAULT;
		877	ENTER;
		878	SAVETMPS;
		879	EXTEND (SP, 3);
		880	PUSHMARK (SP);
		881	PUSHs (&PL_sv_yes);
		882	PUSHs (fullname);
		883	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		884	PUTBACK;
		885	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		886	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		887	SPAGAIN;
		888	FREETMPS;
		889	LEAVE;
		890	PL_runops = runops_trace;
		891	}
		892
		893	oldcxix = cxstack_ix;
		894	}
		895
		896	if (cctx->flags & CC_TRACE_LINE)
		897	{
		898	dSP;
		899
		900	PL_runops = RUNOPS_DEFAULT;
		901	ENTER;
		902	SAVETMPS;
		903	EXTEND (SP, 3);
		904	PL_runops = RUNOPS_DEFAULT;
		905	PUSHMARK (SP);
		906	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		907	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		908	PUTBACK;
		909	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		910	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		911	SPAGAIN;
		912	FREETMPS;
		913	LEAVE;
		914	PL_runops = runops_trace;
		915	}
		916	}
		917	}
		918	}
		919	}
		920
		921	TAINT_NOT;
		922	return 0;
		923	}
		924
577	/* inject a fake call to Coro::State::_cctx_init into the execution */	925	/* inject a fake call to Coro::State::_cctx_init into the execution */
		926	/* _cctx_init should be careful, as it could be called at almost any time */
		927	/* during execution of a perl program */
578	static void NOINLINE	928	static void NOINLINE
579	prepare_cctx (coro_cctx *cctx)	929	cctx_prepare (pTHX_ coro_cctx *cctx)
580	{	930	{
581	dSP;	931	dSP;
582	LOGOP myop;	932	LOGOP myop;
		933
		934	PL_top_env = &PL_start_env;
		935
		936	if (cctx->flags & CC_TRACE)
		937	PL_runops = runops_trace;
583		938
584	Zero (&myop, 1, LOGOP);	939	Zero (&myop, 1, LOGOP);
585	myop.op_next = PL_op;	940	myop.op_next = PL_op;
586	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	941	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
587		942
…		…
593	PL_op = (OP *)&myop;	948	PL_op = (OP *)&myop;
594	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	949	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
595	SPAGAIN;	950	SPAGAIN;
596	}	951	}
597		952
		953	/*
		954	* this is a _very_ stripped down perl interpreter ;)
		955	*/
598	static void	956	static void
599	coro_run (void *arg)	957	cctx_run (void *arg)
600	{	958	{
		959	dTHX;
		960
601	/* coro_run is the alternative tail of transfer(), so unlock here. */	961	/* cctx_run is the alternative tail of transfer(), so unlock here. */
602	UNLOCK;	962	UNLOCK;
603		963
604	/*	964	/* we now skip the entersub that lead to transfer() */
605	* this is a _very_ stripped down perl interpreter ;)	965	PL_op = PL_op->op_next;
606	*/
607	PL_top_env = &PL_start_env;
608		966
609	/* inject call to cctx_init */	967	/* inject a fake subroutine call to cctx_init */
610	prepare_cctx ((coro_cctx *)arg);	968	cctx_prepare (aTHX_ (coro_cctx *)arg);
611		969
612	/* somebody will hit me for both perl_run and PL_restartop */	970	/* somebody or something will hit me for both perl_run and PL_restartop */
613	PL_restartop = PL_op;	971	PL_restartop = PL_op;
614	perl_run (PL_curinterp);	972	perl_run (PL_curinterp);
615		973
616	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	974	/*
617	abort ();	975	* If perl-run returns we assume exit() was being called or the coro
		976	* fell off the end, which seems to be the only valid (non-bug)
		977	* reason for perl_run to return. We try to exit by jumping to the
		978	* bootstrap-time "top" top_env, as we cannot restore the "main"
		979	* coroutine as Coro has no such concept
		980	*/
		981	PL_top_env = main_top_env;
		982	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
618	}	983	}
619		984
620	static coro_cctx *	985	static coro_cctx *
621	cctx_new ()	986	cctx_new ()
622	{	987	{
623	coro_cctx *cctx;	988	coro_cctx *cctx;
		989	void *stack_start;
		990	size_t stack_size;
624		991
625	++cctx_count;	992	++cctx_count;
626		993
627	Newz (0, cctx, 1, coro_cctx);	994	Newz (0, cctx, 1, coro_cctx);
628		995
629	#if HAVE_MMAP	996	#if HAVE_MMAP
630
631	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	997	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
632	/* mmap supposedly does allocate-on-write for us */	998	/* mmap supposedly does allocate-on-write for us */
633	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	999	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
634		1000
635	if (cctx->sptr == (void *)-1)	1001	if (cctx->sptr != (void *)-1)
636	{
637	perror ("FATAL: unable to mmap stack for coroutine");
638	_exit (EXIT_FAILURE);
639	}	1002	{
640
641	# if STACKGUARD	1003	# if CORO_STACKGUARD
642	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1004	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
643	# endif	1005	# endif
		1006	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1007	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1008	cctx->flags |= CC_MAPPED;
		1009	}
		1010	else
		1011	#endif
		1012	{
		1013	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1014	New (0, cctx->sptr, coro_stacksize, long);
644		1015
645	#else
646
647	cctx->ssize = STACKSIZE * (long)sizeof (long);
648	New (0, cctx->sptr, STACKSIZE, long);
649
650	if (!cctx->sptr)	1016	if (!cctx->sptr)
651	{	1017	{
652	perror ("FATAL: unable to malloc stack for coroutine");	1018	perror ("FATAL: unable to allocate stack for coroutine");
653	_exit (EXIT_FAILURE);	1019	_exit (EXIT_FAILURE);
654	}	1020	}
655		1021
656	#endif	1022	stack_start = cctx->sptr;
		1023	stack_size = cctx->ssize;
		1024	}
657		1025
658	#if USE_VALGRIND	1026	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
659	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1027	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
660	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661	cctx->ssize + (char *)cctx->sptr
662	);
663	#endif
664
665	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
666		1028
667	return cctx;	1029	return cctx;
668	}	1030	}
669		1031
670	static void	1032	static void
…		…
673	if (!cctx)	1035	if (!cctx)
674	return;	1036	return;
675		1037
676	--cctx_count;	1038	--cctx_count;
677		1039
678	#if USE_VALGRIND	1040	#if CORO_USE_VALGRIND
679	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1041	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680	#endif	1042	#endif
681		1043
682	#if HAVE_MMAP	1044	#if HAVE_MMAP
		1045	if (cctx->flags & CC_MAPPED)
683	munmap (cctx->sptr, cctx->ssize);	1046	munmap (cctx->sptr, cctx->ssize);
684	#else	1047	else
		1048	#endif
685	Safefree (cctx->sptr);	1049	Safefree (cctx->sptr);
686	#endif
687		1050
688	Safefree (cctx);	1051	Safefree (cctx);
689	}	1052	}
690		1053
		1054	/* wether this cctx should be destructed */
		1055	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1056
691	static coro_cctx *	1057	static coro_cctx *
692	cctx_get ()	1058	cctx_get (pTHX)
693	{	1059	{
694	coro_cctx *cctx;	1060	while (expect_true (cctx_first))
695
696	if (cctx_first)
697	{	1061	{
698	cctx = cctx_first;	1062	coro_cctx *cctx = cctx_first;
699	cctx_first = cctx->next;	1063	cctx_first = cctx->next;
700	--cctx_idle;	1064	--cctx_idle;
701	}	1065
702	else	1066	if (expect_true (!CCTX_EXPIRED (cctx)))
703	{	1067	return cctx;
704	cctx = cctx_new ();	1068
705	PL_op = PL_op->op_next;	1069	cctx_destroy (cctx);
706	}	1070	}
707		1071
708	return cctx;	1072	return cctx_new ();
709	}	1073	}
710		1074
711	static void	1075	static void
712	cctx_put (coro_cctx *cctx)	1076	cctx_put (coro_cctx *cctx)
713	{	1077	{
714	/* free another cctx if overlimit */	1078	/* free another cctx if overlimit */
715	if (cctx_idle >= MAX_IDLE_CCTX)	1079	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
716	{	1080	{
717	coro_cctx *first = cctx_first;	1081	coro_cctx *first = cctx_first;
718	cctx_first = first->next;	1082	cctx_first = first->next;
719	--cctx_idle;	1083	--cctx_idle;
720		1084
721	assert (!first->inuse);
722	cctx_destroy (first);	1085	cctx_destroy (first);
723	}	1086	}
724		1087
725	++cctx_idle;	1088	++cctx_idle;
726	cctx->next = cctx_first;	1089	cctx->next = cctx_first;
727	cctx_first = cctx;	1090	cctx_first = cctx;
728	}	1091	}
729		1092
730	/** coroutine switching *****************************************************/	1093	/** coroutine switching *****************************************************/
731		1094
732	/* never call directly, always through the coro_state_transfer global variable */	1095	static void
		1096	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1097	{
		1098	if (expect_true (prev != next))
		1099	{
		1100	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1101	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1102
		1103	if (expect_false (next->flags & CF_RUNNING))
		1104	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1105
		1106	if (expect_false (next->flags & CF_DESTROYED))
		1107	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1108
		1109	if (
		1110	#if PERL_VERSION_ATLEAST (5,9,0)
		1111	expect_false (PL_parser)
		1112	#else
		1113	expect_false (PL_lex_state != LEX_NOTPARSING)
		1114	#endif
		1115	)
		1116	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1117	}
		1118	}
		1119
		1120	/* always use the TRANSFER macro */
733	static void NOINLINE	1121	static void NOINLINE
734	transfer (struct coro *prev, struct coro *next)	1122	transfer (pTHX_ struct coro *prev, struct coro *next)
735	{	1123	{
736	dSTACKLEVEL;	1124	dSTACKLEVEL;
		1125	static volatile int has_throw;
737		1126
738	/* sometimes transfer is only called to set idle_sp */	1127	/* sometimes transfer is only called to set idle_sp */
739	if (!next)	1128	if (expect_false (!next))
740	{	1129	{
741	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1130	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
742	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1131	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
743	}	1132	}
744	else if (prev != next)	1133	else if (expect_true (prev != next))
745	{	1134	{
746	coro_cctx *prev__cctx;	1135	coro_cctx *prev__cctx;
747		1136
748	if (prev->flags & CF_NEW)	1137	if (expect_false (prev->flags & CF_NEW))
749	{	1138	{
750	/* create a new empty context */	1139	/* create a new empty context */
751	Newz (0, prev->cctx, 1, coro_cctx);	1140	Newz (0, prev->cctx, 1, coro_cctx);
752	prev->cctx->inuse = 1;
753	prev->flags &= ~CF_NEW;	1141	prev->flags &= ~CF_NEW;
754	prev->flags |= CF_RUNNING;	1142	prev->flags |= CF_RUNNING;
755	}	1143	}
756		1144
757	/*TODO: must not croak here */
758	if (!prev->flags & CF_RUNNING)
759	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761	if (next->flags & CF_RUNNING)
762	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764	if (next->flags & CF_DESTROYED)
765	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767	prev->flags &= ~CF_RUNNING;	1145	prev->flags &= ~CF_RUNNING;
768	next->flags |= CF_RUNNING;	1146	next->flags |= CF_RUNNING;
769		1147
770	LOCK;	1148	LOCK;
771		1149
		1150	/* first get rid of the old state */
		1151	save_perl (aTHX_ prev);
		1152
772	if (next->flags & CF_NEW)	1153	if (expect_false (next->flags & CF_NEW))
773	{	1154	{
774	/* need to start coroutine */	1155	/* need to start coroutine */
775	next->flags &= ~CF_NEW;	1156	next->flags &= ~CF_NEW;
776	/* first get rid of the old state */
777	save_perl (prev);
778	/* setup coroutine call */	1157	/* setup coroutine call */
779	setup_coro (next);	1158	coro_setup (aTHX_ next);
780	/* need a new stack */
781	assert (!next->cctx);
782	}	1159	}
783	else	1160	else
784	{
785	/* coroutine already started */
786	save_perl (prev);
787	load_perl (next);	1161	load_perl (aTHX_ next);
788	}
789		1162
790	prev__cctx = prev->cctx;	1163	prev__cctx = prev->cctx;
791		1164
792	/* possibly "free" the cctx */	1165	/* possibly "free" the cctx */
793	if (prev__cctx->idle_sp == STACKLEVEL)	1166	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
794	{	1167	{
795	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1168	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
796	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1169	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
797		1170
798	prev->cctx = 0;	1171	prev->cctx = 0;
799		1172
		1173	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1174	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1175	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1176	if (!next->cctx)
		1177	next->cctx = cctx_get (aTHX);
		1178
800	cctx_put (prev__cctx);	1179	cctx_put (prev__cctx);
801	prev__cctx->inuse = 0;
802	}	1180	}
803		1181
		1182	++next->usecount;
		1183
804	if (!next->cctx)	1184	if (expect_true (!next->cctx))
805	{
806	next->cctx = cctx_get ();	1185	next->cctx = cctx_get (aTHX);
807	assert (!next->cctx->inuse);
808	next->cctx->inuse = 1;
809	}
810		1186
		1187	has_throw = !!next->throw;
		1188
811	if (prev__cctx != next->cctx)	1189	if (expect_false (prev__cctx != next->cctx))
812	{	1190	{
813	prev__cctx->top_env = PL_top_env;	1191	prev__cctx->top_env = PL_top_env;
814	PL_top_env = next->cctx->top_env;	1192	PL_top_env = next->cctx->top_env;
815	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1193	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816	}	1194	}
817		1195
818	free_coro_mortal ();	1196	free_coro_mortal (aTHX);
819	UNLOCK;	1197	UNLOCK;
		1198
		1199	if (expect_false (has_throw))
		1200	{
		1201	struct coro *coro = SvSTATE (coro_current);
		1202
		1203	if (coro->throw)
		1204	{
		1205	SV *exception = coro->throw;
		1206	coro->throw = 0;
		1207	sv_setsv (ERRSV, exception);
		1208	croak (0);
		1209	}
		1210	}
820	}	1211	}
821	}	1212	}
822		1213
823	struct transfer_args	1214	struct transfer_args
824	{	1215	{
825	struct coro *prev, *next;	1216	struct coro *prev, *next;
826	};	1217	};
827		1218
828	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1219	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1220	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
829		1221
830	/** high level stuff ********************************************************/	1222	/** high level stuff ********************************************************/
831		1223
832	static int	1224	static int
833	coro_state_destroy (struct coro *coro)	1225	coro_state_destroy (pTHX_ struct coro *coro)
834	{	1226	{
835	if (coro->flags & CF_DESTROYED)	1227	if (coro->flags & CF_DESTROYED)
836	return 0;	1228	return 0;
837		1229
838	coro->flags |= CF_DESTROYED;	1230	coro->flags |= CF_DESTROYED;
…		…
848	else	1240	else
849	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1241	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850		1242
851	if (coro->mainstack && coro->mainstack != main_mainstack)	1243	if (coro->mainstack && coro->mainstack != main_mainstack)
852	{	1244	{
853	assert (!(coro->flags & CF_RUNNING));
854
855	struct coro temp;	1245	struct coro temp;
856	Zero (&temp, 1, struct coro);
857	temp.save = CORO_SAVE_ALL;
858		1246
859	if (coro->flags & CF_RUNNING)	1247	if (coro->flags & CF_RUNNING)
860	croak ("FATAL: tried to destroy currently running coroutine");	1248	croak ("FATAL: tried to destroy currently running coroutine");
861		1249
862	save_perl (&temp);	1250	save_perl (aTHX_ &temp);
863	load_perl (coro);	1251	load_perl (aTHX_ coro);
864		1252
865	coro_destroy_stacks ();	1253	coro_destroy (aTHX_ coro);
866		1254
867	load_perl (&temp); /* this will get rid of defsv etc.. */	1255	load_perl (aTHX_ &temp);
868		1256
869	coro->mainstack = 0;	1257	coro->slot = 0;
870	}	1258	}
871		1259
872	cctx_destroy (coro->cctx);	1260	cctx_destroy (coro->cctx);
873	SvREFCNT_dec (coro->args);	1261	SvREFCNT_dec (coro->args);
874		1262
		1263	if (coro->next) coro->next->prev = coro->prev;
		1264	if (coro->prev) coro->prev->next = coro->next;
		1265	if (coro == coro_first) coro_first = coro->next;
		1266
875	return 1;	1267	return 1;
876	}	1268	}
877		1269
878	static int	1270	static int
879	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1271	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
880	{	1272	{
881	struct coro *coro = (struct coro *)mg->mg_ptr;	1273	struct coro *coro = (struct coro *)mg->mg_ptr;
882	mg->mg_ptr = 0;	1274	mg->mg_ptr = 0;
883		1275
		1276	coro->hv = 0;
		1277
884	if (--coro->refcnt < 0)	1278	if (--coro->refcnt < 0)
885	{	1279	{
886	coro_state_destroy (coro);	1280	coro_state_destroy (aTHX_ coro);
887	Safefree (coro);	1281	Safefree (coro);
888	}	1282	}
889		1283
890	return 0;	1284	return 0;
891	}	1285	}
…		…
909	#else	1303	#else
910	# define MGf_DUP 0	1304	# define MGf_DUP 0
911	#endif	1305	#endif
912	};	1306	};
913		1307
914	static struct coro *
915	SvSTATE (SV *coro)
916	{
917	HV *stash;
918	MAGIC *mg;
919
920	if (SvROK (coro))
921	coro = SvRV (coro);
922
923	stash = SvSTASH (coro);
924	if (stash != coro_stash && stash != coro_state_stash)
925	{
926	/* very slow, but rare, check */
927	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
928	croak ("Coro::State object required");
929	}
930
931	mg = SvMAGIC (coro);
932	assert (mg->mg_type == PERL_MAGIC_ext);
933	return (struct coro *)mg->mg_ptr;
934	}
935
936	static void	1308	static void
937	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1309	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
938	{	1310	{
939	ta->prev = SvSTATE (prev_sv);	1311	ta->prev = SvSTATE (prev_sv);
940	ta->next = SvSTATE (next_sv);	1312	ta->next = SvSTATE (next_sv);
		1313	TRANSFER_CHECK (*ta);
941	}	1314	}
942		1315
943	static void	1316	static void
944	api_transfer (SV *prev_sv, SV *next_sv)	1317	api_transfer (SV *prev_sv, SV *next_sv)
945	{	1318	{
		1319	dTHX;
946	struct transfer_args ta;	1320	struct transfer_args ta;
947		1321
948	prepare_transfer (&ta, prev_sv, next_sv);	1322	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
949	TRANSFER (ta);	1323	TRANSFER (ta);
950	}	1324	}
951		1325
952	static int
953	api_save (SV *coro_sv, int new_save)
954	{
955	struct coro *coro = SvSTATE (coro_sv);
956	int old_save = coro->save;
957
958	if (new_save >= 0)
959	coro->save = new_save;
960
961	return old_save;
962	}
963
964	/** Coro ********************************************************************/	1326	/** Coro ********************************************************************/
965		1327
966	static void	1328	static void
967	coro_enq (SV *coro_sv)	1329	coro_enq (pTHX_ SV *coro_sv)
968	{	1330	{
969	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1331	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
970	}	1332	}
971		1333
972	static SV *	1334	static SV *
973	coro_deq (int min_prio)	1335	coro_deq (pTHX_ int min_prio)
974	{	1336	{
975	int prio = PRIO_MAX - PRIO_MIN;	1337	int prio = PRIO_MAX - PRIO_MIN;
976		1338
977	min_prio -= PRIO_MIN;	1339	min_prio -= PRIO_MIN;
978	if (min_prio < 0)	1340	if (min_prio < 0)
…		…
986	}	1348	}
987		1349
988	static int	1350	static int
989	api_ready (SV *coro_sv)	1351	api_ready (SV *coro_sv)
990	{	1352	{
		1353	dTHX;
991	struct coro *coro;	1354	struct coro *coro;
992		1355
993	if (SvROK (coro_sv))	1356	if (SvROK (coro_sv))
994	coro_sv = SvRV (coro_sv);	1357	coro_sv = SvRV (coro_sv);
995		1358
…		…
999	return 0;	1362	return 0;
1000		1363
1001	coro->flags |= CF_READY;	1364	coro->flags |= CF_READY;
1002		1365
1003	LOCK;	1366	LOCK;
1004	coro_enq (SvREFCNT_inc (coro_sv));	1367	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1005	++coro_nready;	1368	++coro_nready;
1006	UNLOCK;	1369	UNLOCK;
1007		1370
1008	return 1;	1371	return 1;
1009	}	1372	}
1010		1373
1011	static int	1374	static int
1012	api_is_ready (SV *coro_sv)	1375	api_is_ready (SV *coro_sv)
1013	{	1376	{
		1377	dTHX;
1014	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1378	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1015	}	1379	}
1016		1380
1017	static void	1381	static void
1018	prepare_schedule (struct transfer_args *ta)	1382	prepare_schedule (pTHX_ struct transfer_args *ta)
1019	{	1383	{
1020	SV *prev_sv, *next_sv;	1384	SV *prev_sv, *next_sv;
1021		1385
1022	for (;;)	1386	for (;;)
1023	{	1387	{
1024	LOCK;	1388	LOCK;
1025	next_sv = coro_deq (PRIO_MIN);	1389	next_sv = coro_deq (aTHX_ PRIO_MIN);
1026		1390
1027	/* nothing to schedule: call the idle handler */	1391	/* nothing to schedule: call the idle handler */
1028	if (!next_sv)	1392	if (expect_false (!next_sv))
1029	{	1393	{
		1394	dSP;
1030	UNLOCK;	1395	UNLOCK;
1031	dSP;
1032		1396
1033	ENTER;	1397	ENTER;
1034	SAVETMPS;	1398	SAVETMPS;
1035		1399
1036	PUSHMARK (SP);	1400	PUSHMARK (SP);
…		…
1043	}	1407	}
1044		1408
1045	ta->next = SvSTATE (next_sv);	1409	ta->next = SvSTATE (next_sv);
1046		1410
1047	/* cannot transfer to destroyed coros, skip and look for next */	1411	/* cannot transfer to destroyed coros, skip and look for next */
1048	if (ta->next->flags & CF_DESTROYED)	1412	if (expect_false (ta->next->flags & CF_DESTROYED))
1049	{	1413	{
1050	UNLOCK;	1414	UNLOCK;
1051	SvREFCNT_dec (next_sv);	1415	SvREFCNT_dec (next_sv);
1052	/* coro_nready is already taken care of by destroy */	1416	/* coro_nready is already taken care of by destroy */
1053	continue;	1417	continue;
…		…
1058	break;	1422	break;
1059	}	1423	}
1060		1424
1061	/* free this only after the transfer */	1425	/* free this only after the transfer */
1062	prev_sv = SvRV (coro_current);	1426	prev_sv = SvRV (coro_current);
1063	SvRV_set (coro_current, next_sv);
1064	ta->prev = SvSTATE (prev_sv);	1427	ta->prev = SvSTATE (prev_sv);
1065		1428	TRANSFER_CHECK (*ta);
1066	assert (ta->next->flags & CF_READY);	1429	assert (ta->next->flags & CF_READY);
1067	ta->next->flags &= ~CF_READY;	1430	ta->next->flags &= ~CF_READY;
		1431	SvRV_set (coro_current, next_sv);
1068		1432
1069	LOCK;	1433	LOCK;
1070	free_coro_mortal ();	1434	free_coro_mortal (aTHX);
1071	coro_mortal = prev_sv;	1435	coro_mortal = prev_sv;
1072	UNLOCK;	1436	UNLOCK;
1073	}	1437	}
1074		1438
1075	static void	1439	static void
1076	prepare_cede (struct transfer_args *ta)	1440	prepare_cede (pTHX_ struct transfer_args *ta)
1077	{	1441	{
1078	api_ready (coro_current);	1442	api_ready (coro_current);
1079	prepare_schedule (ta);	1443	prepare_schedule (aTHX_ ta);
1080	}	1444	}
1081		1445
1082	static int	1446	static int
1083	prepare_cede_notself (struct transfer_args *ta)	1447	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1084	{	1448	{
1085	if (coro_nready)	1449	if (coro_nready)
1086	{	1450	{
1087	SV *prev = SvRV (coro_current);	1451	SV *prev = SvRV (coro_current);
1088	prepare_schedule (ta);	1452	prepare_schedule (aTHX_ ta);
1089	api_ready (prev);	1453	api_ready (prev);
1090	return 1;	1454	return 1;
1091	}	1455	}
1092	else	1456	else
1093	return 0;	1457	return 0;
1094	}	1458	}
1095		1459
1096	static void	1460	static void
1097	api_schedule (void)	1461	api_schedule (void)
1098	{	1462	{
		1463	dTHX;
1099	struct transfer_args ta;	1464	struct transfer_args ta;
1100		1465
1101	prepare_schedule (&ta);	1466	prepare_schedule (aTHX_ &ta);
1102	TRANSFER (ta);	1467	TRANSFER (ta);
1103	}	1468	}
1104		1469
1105	static int	1470	static int
1106	api_cede (void)	1471	api_cede (void)
1107	{	1472	{
		1473	dTHX;
1108	struct transfer_args ta;	1474	struct transfer_args ta;
1109		1475
1110	prepare_cede (&ta);	1476	prepare_cede (aTHX_ &ta);
1111		1477
1112	if (ta.prev != ta.next)	1478	if (expect_true (ta.prev != ta.next))
1113	{	1479	{
1114	TRANSFER (ta);	1480	TRANSFER (ta);
1115	return 1;	1481	return 1;
1116	}	1482	}
1117	else	1483	else
…		…
1119	}	1485	}
1120		1486
1121	static int	1487	static int
1122	api_cede_notself (void)	1488	api_cede_notself (void)
1123	{	1489	{
		1490	dTHX;
1124	struct transfer_args ta;	1491	struct transfer_args ta;
1125		1492
1126	if (prepare_cede_notself (&ta))	1493	if (prepare_cede_notself (aTHX_ &ta))
1127	{	1494	{
1128	TRANSFER (ta);	1495	TRANSFER (ta);
1129	return 1;	1496	return 1;
1130	}	1497	}
1131	else	1498	else
1132	return 0;	1499	return 0;
1133	}	1500	}
1134		1501
		1502	static void
		1503	api_trace (SV *coro_sv, int flags)
		1504	{
		1505	dTHX;
		1506	struct coro *coro = SvSTATE (coro_sv);
		1507
		1508	if (flags & CC_TRACE)
		1509	{
		1510	if (!coro->cctx)
		1511	coro->cctx = cctx_new ();
		1512	else if (!(coro->cctx->flags & CC_TRACE))
		1513	croak ("cannot enable tracing on coroutine with custom stack");
		1514
		1515	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1516	}
		1517	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1518	{
		1519	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1520
		1521	if (coro->flags & CF_RUNNING)
		1522	PL_runops = RUNOPS_DEFAULT;
		1523	else
		1524	coro->slot->runops = RUNOPS_DEFAULT;
		1525	}
		1526	}
		1527
1135	MODULE = Coro::State PACKAGE = Coro::State	1528	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1136		1529
1137	PROTOTYPES: DISABLE	1530	PROTOTYPES: DISABLE
1138		1531
1139	BOOT:	1532	BOOT:
1140	{	1533	{
1141	#ifdef USE_ITHREADS	1534	#ifdef USE_ITHREADS
1142	MUTEX_INIT (&coro_mutex);	1535	MUTEX_INIT (&coro_mutex);
1143	#endif	1536	#endif
1144	BOOT_PAGESIZE;	1537	BOOT_PAGESIZE;
1145		1538
		1539	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1540	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1541	#if 0
		1542	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1543	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1544	#endif
		1545	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1546	rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1547	rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1548
1146	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1549	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1147		1550
		1551	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1552	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1148	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1553	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1149	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1150	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1151	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1152	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1554	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1153		1555
1154	main_mainstack = PL_mainstack;	1556	main_mainstack = PL_mainstack;
		1557	main_top_env = PL_top_env;
		1558
		1559	while (main_top_env->je_prev)
		1560	main_top_env = main_top_env->je_prev;
1155		1561
1156	coroapi.ver = CORO_API_VERSION;	1562	coroapi.ver = CORO_API_VERSION;
		1563	coroapi.rev = CORO_API_REVISION;
1157	coroapi.transfer = api_transfer;	1564	coroapi.transfer = api_transfer;
1158		1565
1159	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1566	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1160	}	1567	}
1161		1568
1162	SV *	1569	SV *
1163	new (char *klass, ...)	1570	new (char *klass, ...)
1164	CODE:	1571	CODE:
1165	{	1572	{
1166	struct coro *coro;	1573	struct coro *coro;
		1574	MAGIC *mg;
1167	HV *hv;	1575	HV *hv;
1168	int i;	1576	int i;
1169		1577
1170	Newz (0, coro, 1, struct coro);	1578	Newz (0, coro, 1, struct coro);
1171	coro->args = newAV ();	1579	coro->args = newAV ();
1172	coro->save = CORO_SAVE_ALL;
1173	coro->flags = CF_NEW;	1580	coro->flags = CF_NEW;
1174		1581
		1582	if (coro_first) coro_first->prev = coro;
		1583	coro->next = coro_first;
		1584	coro_first = coro;
		1585
1175	hv = newHV ();	1586	coro->hv = hv = newHV ();
1176	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1587	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1588	mg->mg_flags |= MGf_DUP;
1177	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1589	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1178		1590
		1591	av_extend (coro->args, items - 1);
1179	for (i = 1; i < items; i++)	1592	for (i = 1; i < items; i++)
1180	av_push (coro->args, newSVsv (ST (i)));	1593	av_push (coro->args, newSVsv (ST (i)));
1181	}	1594	}
1182	OUTPUT:	1595	OUTPUT:
1183	RETVAL	1596	RETVAL
1184		1597
1185	int	1598	# these not obviously related functions are all rolled into the same xs
1186	save (SV *coro, int new_save = -1)	1599	# function to increase chances that they all will call transfer with the same
1187	CODE:	1600	# stack offset
1188	RETVAL = api_save (coro, new_save);
1189	OUTPUT:
1190	RETVAL
1191
1192	void	1601	void
1193	_set_stacklevel (...)	1602	_set_stacklevel (...)
1194	ALIAS:	1603	ALIAS:
1195	Coro::State::transfer = 1	1604	Coro::State::transfer = 1
1196	Coro::schedule = 2	1605	Coro::schedule = 2
…		…
1209		1618
1210	case 1:	1619	case 1:
1211	if (items != 2)	1620	if (items != 2)
1212	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1621	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1213		1622
1214	prepare_transfer (&ta, ST (0), ST (1));	1623	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1215	break;	1624	break;
1216		1625
1217	case 2:	1626	case 2:
1218	prepare_schedule (&ta);	1627	prepare_schedule (aTHX_ &ta);
1219	break;	1628	break;
1220		1629
1221	case 3:	1630	case 3:
1222	prepare_cede (&ta);	1631	prepare_cede (aTHX_ &ta);
1223	break;	1632	break;
1224		1633
1225	case 4:	1634	case 4:
1226	if (!prepare_cede_notself (&ta))	1635	if (!prepare_cede_notself (aTHX_ &ta))
1227	XSRETURN_EMPTY;	1636	XSRETURN_EMPTY;
1228		1637
1229	break;	1638	break;
1230	}	1639	}
1231		1640
1232	BARRIER;	1641	BARRIER;
		1642	PUTBACK;
1233	TRANSFER (ta);	1643	TRANSFER (ta);
1234		1644	SPAGAIN; /* might be the sp of a different coroutine now */
1235	if (GIMME_V != G_VOID && ta.next != ta.prev)	1645	/* be extra careful not to ever do anything after TRANSFER */
1236	XSRETURN_YES;
1237	}	1646	}
1238		1647
1239	bool	1648	bool
1240	_destroy (SV *coro_sv)	1649	_destroy (SV *coro_sv)
1241	CODE:	1650	CODE:
1242	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1651	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1243	OUTPUT:	1652	OUTPUT:
1244	RETVAL	1653	RETVAL
1245		1654
1246	void	1655	void
1247	_exit (code)	1656	_exit (code)
…		…
1249	PROTOTYPE: $	1658	PROTOTYPE: $
1250	CODE:	1659	CODE:
1251	_exit (code);	1660	_exit (code);
1252		1661
1253	int	1662	int
		1663	cctx_stacksize (int new_stacksize = 0)
		1664	CODE:
		1665	RETVAL = coro_stacksize;
		1666	if (new_stacksize)
		1667	coro_stacksize = new_stacksize;
		1668	OUTPUT:
		1669	RETVAL
		1670
		1671	int
1254	cctx_count ()	1672	cctx_count ()
1255	CODE:	1673	CODE:
1256	RETVAL = cctx_count;	1674	RETVAL = cctx_count;
1257	OUTPUT:	1675	OUTPUT:
1258	RETVAL	1676	RETVAL
…		…
1262	CODE:	1680	CODE:
1263	RETVAL = cctx_idle;	1681	RETVAL = cctx_idle;
1264	OUTPUT:	1682	OUTPUT:
1265	RETVAL	1683	RETVAL
1266		1684
		1685	void
		1686	list ()
		1687	PPCODE:
		1688	{
		1689	struct coro *coro;
		1690	for (coro = coro_first; coro; coro = coro->next)
		1691	if (coro->hv)
		1692	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1693	}
		1694
		1695	void
		1696	call (Coro::State coro, SV *coderef)
		1697	ALIAS:
		1698	eval = 1
		1699	CODE:
		1700	{
		1701	if (coro->mainstack)
		1702	{
		1703	struct coro temp;
		1704
		1705	if (!(coro->flags & CF_RUNNING))
		1706	{
		1707	save_perl (aTHX_ &temp);
		1708	load_perl (aTHX_ coro);
		1709	}
		1710
		1711	{
		1712	dSP;
		1713	ENTER;
		1714	SAVETMPS;
		1715	PUTBACK;
		1716	PUSHSTACK;
		1717	PUSHMARK (SP);
		1718
		1719	if (ix)
		1720	eval_sv (coderef, 0);
		1721	else
		1722	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1723
		1724	POPSTACK;
		1725	SPAGAIN;
		1726	FREETMPS;
		1727	LEAVE;
		1728	PUTBACK;
		1729	}
		1730
		1731	if (!(coro->flags & CF_RUNNING))
		1732	{
		1733	save_perl (aTHX_ coro);
		1734	load_perl (aTHX_ &temp);
		1735	}
		1736	}
		1737	}
		1738
		1739	SV *
		1740	is_ready (Coro::State coro)
		1741	PROTOTYPE: $
		1742	ALIAS:
		1743	is_ready = CF_READY
		1744	is_running = CF_RUNNING
		1745	is_new = CF_NEW
		1746	is_destroyed = CF_DESTROYED
		1747	CODE:
		1748	RETVAL = boolSV (coro->flags & ix);
		1749	OUTPUT:
		1750	RETVAL
		1751
		1752	void
		1753	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1754
		1755	SV *
		1756	has_stack (Coro::State coro)
		1757	PROTOTYPE: $
		1758	CODE:
		1759	RETVAL = boolSV (!!coro->cctx);
		1760	OUTPUT:
		1761	RETVAL
		1762
		1763	int
		1764	is_traced (Coro::State coro)
		1765	PROTOTYPE: $
		1766	CODE:
		1767	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1768	OUTPUT:
		1769	RETVAL
		1770
		1771	IV
		1772	rss (Coro::State coro)
		1773	PROTOTYPE: $
		1774	ALIAS:
		1775	usecount = 1
		1776	CODE:
		1777	switch (ix)
		1778	{
		1779	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1780	case 1: RETVAL = coro->usecount; break;
		1781	}
		1782	OUTPUT:
		1783	RETVAL
		1784
		1785
1267	MODULE = Coro::State PACKAGE = Coro	1786	MODULE = Coro::State PACKAGE = Coro
1268		1787
1269	BOOT:	1788	BOOT:
1270	{	1789	{
1271	int i;	1790	int i;
1272		1791
		1792	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1793	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1794	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1795
		1796	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1797	SvREADONLY_on (coro_current);
		1798
1273	coro_stash = gv_stashpv ("Coro", TRUE);	1799	coro_stash = gv_stashpv ("Coro", TRUE);
1274		1800
1275	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1801	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1276	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1802	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1277	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1803	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1278	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1804	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1279	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1805	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1280	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1806	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1281		1807
1282	coro_current = get_sv ("Coro::current", FALSE);
1283	SvREADONLY_on (coro_current);
1284
1285	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1808	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1286	coro_ready[i] = newAV ();	1809	coro_ready[i] = newAV ();
1287		1810
1288	{	1811	{
1289	SV *sv = perl_get_sv("Coro::API", 1);	1812	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1813	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1290		1814
1291	coroapi.schedule = api_schedule;	1815	coroapi.schedule = api_schedule;
1292	coroapi.save = api_save;
1293	coroapi.cede = api_cede;	1816	coroapi.cede = api_cede;
1294	coroapi.cede_notself = api_cede_notself;	1817	coroapi.cede_notself = api_cede_notself;
1295	coroapi.ready = api_ready;	1818	coroapi.ready = api_ready;
1296	coroapi.is_ready = api_is_ready;	1819	coroapi.is_ready = api_is_ready;
1297	coroapi.nready = &coro_nready;	1820	coroapi.nready = &coro_nready;
…		…
1338	CODE:	1861	CODE:
1339	RETVAL = boolSV (api_ready (self));	1862	RETVAL = boolSV (api_ready (self));
1340	OUTPUT:	1863	OUTPUT:
1341	RETVAL	1864	RETVAL
1342		1865
1343	SV *
1344	is_ready (SV *self)
1345	PROTOTYPE: $
1346	CODE:
1347	RETVAL = boolSV (api_is_ready (self));
1348	OUTPUT:
1349	RETVAL
1350
1351	int	1866	int
1352	nready (...)	1867	nready (...)
1353	PROTOTYPE:	1868	PROTOTYPE:
1354	CODE:	1869	CODE:
1355	RETVAL = coro_nready;	1870	RETVAL = coro_nready;
1356	OUTPUT:	1871	OUTPUT:
1357	RETVAL	1872	RETVAL
1358		1873
		1874	void
		1875	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1876	PROTOTYPE: $;$
		1877	CODE:
		1878	SvREFCNT_dec (self->throw);
		1879	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1880
		1881	# for async_pool speedup
		1882	void
		1883	_pool_1 (SV *cb)
		1884	CODE:
		1885	{
		1886	struct coro *coro = SvSTATE (coro_current);
		1887	HV *hv = (HV *)SvRV (coro_current);
		1888	AV *defav = GvAV (PL_defgv);
		1889	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1890	AV *invoke_av;
		1891	int i, len;
		1892
		1893	if (!invoke)
		1894	croak ("\3async_pool terminate\2\n");
		1895
		1896	SvREFCNT_dec (coro->saved_deffh);
		1897	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1898
		1899	hv_store (hv, "desc", sizeof ("desc") - 1,
		1900	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1901
		1902	invoke_av = (AV *)SvRV (invoke);
		1903	len = av_len (invoke_av);
		1904
		1905	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1906
		1907	if (len > 0)
		1908	{
		1909	av_fill (defav, len - 1);
		1910	for (i = 0; i < len; ++i)
		1911	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1912	}
		1913
		1914	SvREFCNT_dec (invoke);
		1915	}
		1916
		1917	void
		1918	_pool_2 (SV *cb)
		1919	CODE:
		1920	{
		1921	struct coro *coro = SvSTATE (coro_current);
		1922
		1923	sv_setsv (cb, &PL_sv_undef);
		1924
		1925	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1926	coro->saved_deffh = 0;
		1927
		1928	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1929	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1930	croak ("\3async_pool terminate\2\n");
		1931
		1932	av_clear (GvAV (PL_defgv));
		1933	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1934	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1935
		1936	coro->prio = 0;
		1937
		1938	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1939	api_trace (coro_current, 0);
		1940
		1941	av_push (av_async_pool, newSVsv (coro_current));
		1942	}
		1943
		1944
1359	MODULE = Coro::State PACKAGE = Coro::AIO	1945	MODULE = Coro::State PACKAGE = Coro::AIO
1360		1946
1361	SV *	1947	SV *
1362	_get_state ()	1948	_get_state ()
1363	CODE:	1949	CODE:

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