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Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.218 by root, Mon Dec 3 00:41:45 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"
		11
		12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
		16
		17	#ifdef HAVE_MMAP
		18	# include <unistd.h>
		19	# include <sys/mman.h>
		20	# ifndef MAP_ANONYMOUS
		21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
		23	# else
		24	# undef HAVE_MMAP
		25	# endif
		26	# endif
		27	# include <limits.h>
		28	# ifndef PAGESIZE
		29	# define PAGESIZE pagesize
		30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		31	static long pagesize;
		32	# else
		33	# define BOOT_PAGESIZE (void)0
		34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
		39
		40	#if CORO_USE_VALGRIND
		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)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
8		49
9	#define PERL_VERSION_ATLEAST(a,b,c) \	50	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	51	(PERL_REVISION > (a) \
11	|| (PERL_REVISION == (a) \	52	|| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	53	&& (PERL_VERSION > (b) \
…		…
31	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
33	# endif	74	# endif
34	#endif	75	#endif
35		76
36	#include <stdio.h>	77	/* 5.8.7 */
37	#include <errno.h>	78	#ifndef SvRV_set
		79	# define SvRV_set(s,v) SvRV(s) = (v)
		80	#endif
		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
38		89
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	91	# undef CORO_STACKGUARD
41	#endif
42
43	#ifndef STACKGUARD
44	# define STACKGUARD 0
45	#endif
46
47	#ifdef HAVE_MMAP
48	# include <unistd.h>
49	# include <sys/mman.h>
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif	92	#endif
57	# include <limits.h>	93
58	# ifndef PAGESIZE	94	#ifndef CORO_STACKGUARD
59	# define PAGESIZE pagesize	95	# define CORO_STACKGUARD 0
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif	96	#endif
65	#endif
66		97
67	/* The next macro should declare a variable stacklevel that contains and approximation	98	/* prefer perl internal functions over our own? */
68	* to the current C stack pointer. Its property is that it changes with each call	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
69	* and should be unique. */	100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
		102
		103	/* The next macros try to return the current stack pointer, in an as
		104	* portable way as possible. */
70	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
71	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
72		107
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		109
75	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
76	# 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))
77	#else	114	#else
78	# define attribute(x)	115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
79	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
80		122
81	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
82		124
83	#include "CoroAPI.h"	125	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		126
87	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	131	#else
92	# define LOCK (void)0	132	# define LOCK (void)0
93	# define UNLOCK (void)0	133	# define UNLOCK (void)0
94	#endif	134	#endif
95		135
		136	/* helper storage struct for Coro::AIO */
		137	struct io_state
		138	{
		139	int errorno;
		140	I32 laststype;
		141	int laststatval;
		142	Stat_t statcache;
		143	};
		144
		145	static size_t coro_stacksize = CORO_STACKSIZE;
96	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
97	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;
98	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
99	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;
		162
		163	static struct coro_cctx *cctx_first;
		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	};
100		174
101	/* this is a structure representing a c-level coroutine */	175	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	176	typedef struct coro_cctx {
103	struct coro_stack *next;	177	struct coro_cctx *next;
104		178
105	/* the stack */	179	/* the stack */
106	void *sptr;	180	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	181	size_t ssize;
108		182
109	/* cpu state */	183	/* cpu state */
110	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 */
111	JMPENV *top_env;	186	JMPENV *top_env;
112	coro_context cctx;	187	coro_context cctx;
113	} coro_stack;	188
		189	#if CORO_USE_VALGRIND
		190	int valgrind_id;
		191	#endif
		192	unsigned char flags;
		193	} coro_cctx;
		194
		195	enum {
		196	CF_RUNNING = 0x0001, /* coroutine is running */
		197	CF_READY = 0x0002, /* coroutine is ready */
		198	CF_NEW = 0x0004, /* has never been switched to */
		199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		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))
114		214
115	/* this is a structure representing a perl-level coroutine */	215	/* this is a structure representing a perl-level coroutine */
116	struct coro {	216	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	217	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	218	coro_cctx *cctx;
119		219
120	/* data associated with this coroutine (initial args) */	220	/* process data */
121	AV *args;
122	int refcnt;
123
124	/* optionally saved, might be zero */
125	AV *defav;
126	SV *defsv;
127	SV *errsv;
128
129	/* saved global state not related to stacks */
130	U8 dowarn;
131	I32 in_eval;
132
133	/* the stacks and related info (callchain etc..) */
134	PERL_SI *curstackinfo;
135	AV *curstack;
136	AV *mainstack;	221	AV *mainstack;
137	SV **stack_sp;	222	perl_slots *slot; /* basically the saved sp */
138	OP *op;	223
139	SV **curpad;	224	AV *args; /* data associated with this coroutine (initial args) */
140	AV *comppad;	225	int refcnt; /* coroutines are refcounted, yes */
141	CV *compcv;	226	int flags; /* CF_ flags */
142	SV **stack_base;	227	HV *hv; /* the perl hash associated with this coro, if any */
143	SV **stack_max;	228
144	SV **tmps_stack;	229	/* statistics */
145	I32 tmps_floor;	230	int usecount; /* number of transfers to this coro */
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		231
163	/* coro process data */	232	/* coro process data */
164	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;
165	};	241	};
166		242
167	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
169		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
170	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 *
171	coro_clone_padlist (CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
172	{	295	{
173	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
175		298
176	newpadlist = newAV ();	299	newpadlist = newAV ();
…		…
188		311
189	return newpadlist;	312	return newpadlist;
190	}	313	}
191		314
192	static void	315	static void
193	free_padlist (AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
194	{	317	{
195	/* may be during global destruction */	318	/* may be during global destruction */
196	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
197	{	320	{
198	I32 i = AvFILLp (padlist);	321	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	342	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
221		344
222	/* casting is fun. */	345	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	347	free_padlist (aTHX_ padlist);
225
226	SvREFCNT_dec (av);
227		348
228	return 0;	349	return 0;
229	}	350	}
230		351
231	#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
232		354
233	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	};
		359
		360	#define CORO_MAGIC(sv,type) \
		361	SvMAGIC (sv) \
		362	? SvMAGIC (sv)->mg_type == type \
		363	? SvMAGIC (sv) \
		364	: mg_find (sv, type) \
		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))
234		395
235	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
236	static void	397	static void
237	get_padlist (CV *cv)	398	get_padlist (pTHX_ CV *cv)
238	{	399	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
		401	AV *av;
240		402
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	405	else
244	{	406	{
245	#if 0	407	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	408	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	409	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
251	#else	413	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	415	#endif
254	}	416	}
255	}	417	}
256		418
257	static void	419	static void
258	put_padlist (CV *cv)	420	put_padlist (pTHX_ CV *cv)
259	{	421	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
		423	AV *av;
261		424
262	if (!mg)	425	if (expect_false (!mg))
263	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();
268	}
269		427
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	428	av = (AV *)mg->mg_obj;
271	}
272		429
273	#define SB do {	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
274	#define SE } while (0)	431	av_extend (av, AvMAX (av) + 1);
275		432
276	#define LOAD(state) load_state((state));	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	#define SAVE(state,flags) save_state((state),(flags));	434	}
278		435
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	436	/** load & save, init *******************************************************/
280		437
281	static void	438	static void
282	load_state(Coro__State c)	439	load_perl (pTHX_ Coro__State c)
283	{	440	{
284	PL_dowarn = c->dowarn;	441	perl_slots *slot = c->slot;
285	PL_in_eval = c->in_eval;	442	c->slot = 0;
286		443
287	PL_curstackinfo = c->curstackinfo;
288	PL_curstack = c->curstack;
289	PL_mainstack = c->mainstack;	444	PL_mainstack = c->mainstack;
290	PL_stack_sp = c->stack_sp;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317		445
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	446	GvSV (PL_defgv) = slot->defsv;
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	447	GvAV (PL_defgv) = slot->defav;
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	448	GvSV (PL_errgv) = slot->errsv;
		449	GvSV (irsgv) = slot->irsgv;
		450
		451	#define VAR(name,type) PL_ ## name = slot->name;
		452	# include "state.h"
		453	#undef VAR
321		454
322	{	455	{
323	dSP;	456	dSP;
		457
324	CV *cv;	458	CV *cv;
325		459
326	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
328	{	462	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	464	CvDEPTH (cv) = PTR2IV (POPs);
335	}	465	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	466	}
339		467
340	PUTBACK;	468	PUTBACK;
341	}	469	}
342	}	470	}
343		471
344	static void	472	static void
345	save_state(Coro__State c, int flags)	473	save_perl (pTHX_ Coro__State c)
346	{	474	{
347	{	475	{
348	dSP;	476	dSP;
349	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	481	/*
354	* 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
355	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
356	*/	484	*/
357		485
358	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
360	for (;;)	488	for (;;)
361	{	489	{
362	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
363	{	491	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
365		493
366	if (CxTYPE(cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
367	{	495	{
368	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
		497
369	if (CvDEPTH(cv))	498	if (expect_true (CvDEPTH (cv)))
370	{	499	{
371	EXTEND (SP, CvDEPTH(cv)*2);	500	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	501	PUSHs ((SV *)CvPADLIST (cv));
		502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
382		504
		505	CvDEPTH (cv) = 0;
383	get_padlist (cv);	506	get_padlist (aTHX_ cv);
384	}	507	}
385	}	508	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	509	}
395		510
396	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
397	break;	512	break;
398		513
399	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
400	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
401	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
402	}	517	}
403		518
404	PUTBACK;	519	PUTBACK;
405	}	520	}
406		521
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	524	if (SLOT_COUNT >= 1) CXINC;
		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 */
410		533
411	c->dowarn = PL_dowarn;
412	c->in_eval = PL_in_eval;
413
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;	534	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;	535
418	c->op = PL_op;	536	{
419	c->curpad = PL_curpad;	537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420	c->comppad = PL_comppad;	538
421	c->compcv = PL_compcv;	539	slot->defav = GvAV (PL_defgv);
422	c->stack_base = PL_stack_base;	540	slot->defsv = DEFSV;
423	c->stack_max = PL_stack_max;	541	slot->errsv = ERRSV;
424	c->tmps_stack = PL_tmps_stack;	542	slot->irsgv = GvSV (irsgv);
425	c->tmps_floor = PL_tmps_floor;	543
426	c->tmps_ix = PL_tmps_ix;	544	#define VAR(name,type) slot->name = PL_ ## name;
427	c->tmps_max = PL_tmps_max;	545	# include "state.h"
428	c->markstack = PL_markstack;	546	#undef VAR
429	c->markstack_ptr = PL_markstack_ptr;	547	}
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	548	}
445		549
446	/*	550	/*
447	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
451	*/	555	*/
		556	#if CORO_PREFER_PERL_FUNCTIONS
		557	# define coro_init_stacks init_stacks
		558	#else
452	static void	559	static void
453	coro_init_stacks ()	560	coro_init_stacks (pTHX)
454	{	561	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	562	PL_curstackinfo = new_stackinfo(32, 8);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		566
460	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		570
464	New(50,PL_tmps_stack,96,SV*);	571	New(50,PL_tmps_stack,32,SV*);
465	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	574	PL_tmps_max = 32;
468		575
469	New(54,PL_markstack,16,I32);	576	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	578	PL_markstack_max = PL_markstack + 16;
472		579
473	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
475	#endif	582	#endif
476		583
477	New(54,PL_scopestack,16,I32);	584	New(54,PL_scopestack,8,I32);
478	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	586	PL_scopestack_max = 8;
480		587
481	New(54,PL_savestack,96,ANY);	588	New(54,PL_savestack,24,ANY);
482	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	590	PL_savestack_max = 24;
484		591
485	#if !PERL_VERSION_ATLEAST (5,9,0)	592	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	593	New(54,PL_retstack,4,OP*);
487	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	595	PL_retstack_max = 4;
489	#endif	596	#endif
490	}	597	}
		598	#endif
491		599
492	/*	600	/*
493	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
494	*/	602	*/
495	static void	603	static void
496	coro_destroy_stacks()	604	coro_destroy_stacks (pTHX)
497	{	605	{
498	if (!IN_DESTRUCT)
499	{
500	/* is this ugly, I ask? */
501	LEAVE_SCOPE (0);
502
503	/* sure it is, but more important: is it correct?? :/ */
504	FREETMPS;
505
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507	}
508
509	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
511		608
512	while (PL_curstackinfo)	609	while (PL_curstackinfo)
513	{	610	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	611	PERL_SI *p = PL_curstackinfo->si_prev;
515		612
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	613	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	614	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		615
528	Safefree (PL_curstackinfo->si_cxstack);	616	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	617	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	618	PL_curstackinfo = p;
531	}	619	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	625	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	626	Safefree (PL_retstack);
539	#endif	627	#endif
540	}	628	}
541		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	#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	*/
542	static void	681	static int
543	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)
544	{	699	{
545	/*	700	/*
546	* emulate part of the perl startup here.	701	* emulate part of the perl startup here.
547	*/	702	*/
548
549	coro_init_stacks ();	703	coro_init_stacks (aTHX);
550		704
		705	PL_runops = RUNOPS_DEFAULT;
		706	PL_curcop = &PL_compiling;
		707	PL_in_eval = EVAL_NULL;
551	PL_curcop = 0;	708	PL_comppad = 0;
552	PL_in_eval = 0;
553	PL_curpm = 0;	709	PL_curpm = 0;
		710	PL_curpad = 0;
		711	PL_localizing = 0;
		712	PL_dirty = 0;
		713	PL_restartop = 0;
		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);
554		730
555	{	731	{
556	dSP;	732	dSP;
557	LOGOP myop;	733	LOGOP myop;
558		734
559	/* I have no idea why this is needed, but it is */
560	PUSHMARK (SP);
561
562	SvREFCNT_dec (GvAV (PL_defgv));
563	GvAV (PL_defgv) = coro->args; coro->args = 0;
564
565	Zero (&myop, 1, LOGOP);	735	Zero (&myop, 1, LOGOP);
566	myop.op_next = Nullop;	736	myop.op_next = Nullop;
567	myop.op_flags = OPf_WANT_VOID;	737	myop.op_flags = OPf_WANT_VOID;
568		738
		739	PUSHMARK (SP);
		740	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		741	PUTBACK;
569	PL_op = (OP *)&myop;	742	PL_op = (OP *)&myop;
570
571	PUSHMARK (SP);
572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573	PUTBACK;
574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	743	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575	SPAGAIN;	744	SPAGAIN;
576
577	ENTER; /* necessary e.g. for dounwind */
578	}	745	}
579	}
580		746
		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;
		753	}
		754
581	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
582	free_coro_mortal ()	792	free_coro_mortal (pTHX)
583	{	793	{
584	if (coro_mortal)	794	if (expect_true (coro_mortal))
585	{	795	{
586	SvREFCNT_dec (coro_mortal);	796	SvREFCNT_dec (coro_mortal);
587	coro_mortal = 0;	797	coro_mortal = 0;
588	}	798	}
589	}	799	}
590		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
		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 */
591	static void NOINLINE	928	static void NOINLINE
592	prepare_cctx (coro_stack *cctx)	929	cctx_prepare (pTHX_ coro_cctx *cctx)
593	{	930	{
594	dSP;	931	dSP;
595	LOGOP myop;	932	LOGOP myop;
596		933
		934	PL_top_env = &PL_start_env;
		935
		936	if (cctx->flags & CC_TRACE)
		937	PL_runops = runops_trace;
		938
597	Zero (&myop, 1, LOGOP);	939	Zero (&myop, 1, LOGOP);
598	myop.op_next = PL_op;	940	myop.op_next = PL_op;
599	myop.op_flags = OPf_WANT_VOID;	941	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
600
601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602		942
603	PUSHMARK (SP);	943	PUSHMARK (SP);
		944	EXTEND (SP, 2);
		945	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	946	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
605	PUTBACK;	947	PUTBACK;
		948	PL_op = (OP *)&myop;
606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	949	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607	SPAGAIN;	950	SPAGAIN;
608	}	951	}
609		952
		953	/*
		954	* this is a _very_ stripped down perl interpreter ;)
		955	*/
610	static void	956	static void
611	coro_run (void *arg)	957	cctx_run (void *arg)
612	{	958	{
		959	dTHX;
		960
613	/* coro_run is the alternative epilogue of transfer() */	961	/* cctx_run is the alternative tail of transfer(), so unlock here. */
614	UNLOCK;	962	UNLOCK;
615		963
		964	/* we now skip the entersub that lead to transfer() */
		965	PL_op = PL_op->op_next;
		966
		967	/* inject a fake subroutine call to cctx_init */
		968	cctx_prepare (aTHX_ (coro_cctx *)arg);
		969
		970	/* somebody or something will hit me for both perl_run and PL_restartop */
		971	PL_restartop = PL_op;
		972	perl_run (PL_curinterp);
		973
616	/*	974	/*
617	* this is a _very_ stripped down perl interpreter ;)	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
618	*/	980	*/
619	PL_top_env = &PL_start_env;	981	PL_top_env = main_top_env;
620	/* inject call to cctx_init */	982	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
621	prepare_cctx ((coro_stack *)arg);
622
623	/* somebody will hit me for both perl_run and PL_restartop */
624	perl_run (PL_curinterp);
625
626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
627	abort ();
628	}	983	}
629		984
630	static coro_stack *	985	static coro_cctx *
631	stack_new ()	986	cctx_new ()
632	{	987	{
633	coro_stack *stack;	988	coro_cctx *cctx;
		989	void *stack_start;
		990	size_t stack_size;
634		991
		992	++cctx_count;
		993
635	New (0, stack, 1, coro_stack);	994	Newz (0, cctx, 1, coro_cctx);
636		995
637	#if HAVE_MMAP	996	#if HAVE_MMAP
638
639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	997	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640	/* mmap suppsedly does allocate-on-write for us */	998	/* mmap supposedly does allocate-on-write for us */
641	stack->sptr = mmap (0, stack->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);
642		1000
643	if (stack->sptr == (void *)-1)	1001	if (cctx->sptr != (void *)-1)
644	{
645	perror ("FATAL: unable to mmap stack for coroutine");
646	_exit (EXIT_FAILURE);
647	}	1002	{
648
649	# if STACKGUARD	1003	# if CORO_STACKGUARD
650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1004	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
651	# 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);
652		1015
		1016	if (!cctx->sptr)
		1017	{
		1018	perror ("FATAL: unable to allocate stack for coroutine");
		1019	_exit (EXIT_FAILURE);
		1020	}
		1021
		1022	stack_start = cctx->sptr;
		1023	stack_size = cctx->ssize;
		1024	}
		1025
		1026	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1027	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1028
		1029	return cctx;
		1030	}
		1031
		1032	static void
		1033	cctx_destroy (coro_cctx *cctx)
		1034	{
		1035	if (!cctx)
		1036	return;
		1037
		1038	--cctx_count;
		1039
		1040	#if CORO_USE_VALGRIND
		1041	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1042	#endif
		1043
		1044	#if HAVE_MMAP
		1045	if (cctx->flags & CC_MAPPED)
		1046	munmap (cctx->sptr, cctx->ssize);
		1047	else
		1048	#endif
		1049	Safefree (cctx->sptr);
		1050
		1051	Safefree (cctx);
		1052	}
		1053
		1054	/* wether this cctx should be destructed */
		1055	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1056
		1057	static coro_cctx *
		1058	cctx_get (pTHX)
		1059	{
		1060	while (expect_true (cctx_first))
		1061	{
		1062	coro_cctx *cctx = cctx_first;
		1063	cctx_first = cctx->next;
		1064	--cctx_idle;
		1065
		1066	if (expect_true (!CCTX_EXPIRED (cctx)))
		1067	return cctx;
		1068
		1069	cctx_destroy (cctx);
		1070	}
		1071
		1072	return cctx_new ();
		1073	}
		1074
		1075	static void
		1076	cctx_put (coro_cctx *cctx)
		1077	{
		1078	/* free another cctx if overlimit */
		1079	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1080	{
		1081	coro_cctx *first = cctx_first;
		1082	cctx_first = first->next;
		1083	--cctx_idle;
		1084
		1085	cctx_destroy (first);
		1086	}
		1087
		1088	++cctx_idle;
		1089	cctx->next = cctx_first;
		1090	cctx_first = cctx;
		1091	}
		1092
		1093	/** coroutine switching *****************************************************/
		1094
		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)
653	#else	1112	#else
654		1113	expect_false (PL_lex_state != LEX_NOTPARSING)
655	stack->ssize = STACKSIZE * (long)sizeof (long);
656	New (0, stack->sptr, STACKSIZE, long);
657
658	if (!stack->sptr)
659	{
660	perror (stderr, "FATAL: unable to malloc stack for coroutine");
661	_exit (EXIT_FAILURE);
662	}
663
664	#endif	1114	#endif
665		1115	)
666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	1116	croak ("Coro::State::transfer called while parsing, but this is not supported");
667
668	return stack;
669	}
670
671	static void
672	stack_free (coro_stack *stack)
673	{
674	if (!stack)
675	return;
676
677	#if HAVE_MMAP
678	munmap (stack->sptr, stack->ssize);
679	#else
680	Safefree (stack->sptr);
681	#endif
682
683	Safefree (stack);
684	}
685
686	static coro_stack *stack_first;
687	static int cctx_count, cctx_idle;
688
689	static coro_stack *
690	stack_get ()
691	{
692	coro_stack *stack;
693
694	if (stack_first)
695	{
696	--cctx_idle;
697	stack = stack_first;
698	stack_first = stack->next;
699	}
700	else
701	{
702	++cctx_count;
703	stack = stack_new ();
704	PL_op = PL_op->op_next;
705	}	1117	}
706
707	return stack;
708	}	1118	}
709		1119
710	static void	1120	/* always use the TRANSFER macro */
711	stack_put (coro_stack *stack)
712	{
713	++cctx_idle;
714	stack->next = stack_first;
715	stack_first = stack;
716	}
717
718	/* never call directly, always through the coro_state_transfer global variable */
719	static void NOINLINE	1121	static void NOINLINE
720	transfer (struct coro *prev, struct coro *next, int flags)	1122	transfer (pTHX_ struct coro *prev, struct coro *next)
721	{	1123	{
722	dSTACKLEVEL;	1124	dSTACKLEVEL;
		1125	static volatile int has_throw;
723		1126
724	/* sometimes transfer is only called to set idle_sp */	1127	/* sometimes transfer is only called to set idle_sp */
725	if (flags == TRANSFER_SET_STACKLEVEL)	1128	if (expect_false (!next))
		1129	{
726	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1130	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
727	else if (prev != next)	1131	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
728	{	1132	}
		1133	else if (expect_true (prev != next))
		1134	{
729	coro_stack *prev__stack;	1135	coro_cctx *prev__cctx;
		1136
		1137	if (expect_false (prev->flags & CF_NEW))
		1138	{
		1139	/* create a new empty context */
		1140	Newz (0, prev->cctx, 1, coro_cctx);
		1141	prev->flags &= ~CF_NEW;
		1142	prev->flags |= CF_RUNNING;
		1143	}
		1144
		1145	prev->flags &= ~CF_RUNNING;
		1146	next->flags |= CF_RUNNING;
730		1147
731	LOCK;	1148	LOCK;
732		1149
733	if (next->mainstack)	1150	/* first get rid of the old state */
		1151	save_perl (aTHX_ prev);
		1152
		1153	if (expect_false (next->flags & CF_NEW))
734	{	1154	{
735	/* coroutine already started */	1155	/* need to start coroutine */
736	SAVE (prev, flags);	1156	next->flags &= ~CF_NEW;
737	LOAD (next);	1157	/* setup coroutine call */
		1158	coro_setup (aTHX_ next);
738	}	1159	}
739	else	1160	else
		1161	load_perl (aTHX_ next);
		1162
		1163	prev__cctx = prev->cctx;
		1164
		1165	/* possibly "free" the cctx */
		1166	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
740	{	1167	{
741	/* need to start coroutine */	1168	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742	/* first get rid of the old state */	1169	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
743	SAVE (prev, -1);	1170
744	/* setup coroutine call */	1171	prev->cctx = 0;
745	setup_coro (next);	1172
746	/* need a stack */	1173	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
747	next->stack = 0;	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
		1179	cctx_put (prev__cctx);
748	}	1180	}
749		1181
750	if (!prev->stack)	1182	++next->usecount;
751	/* create a new empty context */
752	Newz (0, prev->stack, 1, coro_stack);
753		1183
754	prev__stack = prev->stack;	1184	if (expect_true (!next->cctx))
		1185	next->cctx = cctx_get (aTHX);
755		1186
756	/* possibly "free" the stack */	1187	has_throw = !!next->throw;
757	if (prev__stack->idle_sp == STACKLEVEL)	1188
		1189	if (expect_false (prev__cctx != next->cctx))
758	{	1190	{
759	stack_put (prev__stack);	1191	prev__cctx->top_env = PL_top_env;
760	prev->stack = 0;	1192	PL_top_env = next->cctx->top_env;
		1193	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
761	}	1194	}
762		1195
763	if (!next->stack)	1196	free_coro_mortal (aTHX);
764	next->stack = stack_get ();	1197	UNLOCK;
765		1198
766	if (prev__stack != next->stack)	1199	if (expect_false (has_throw))
767	{	1200	{
768	prev__stack->top_env = PL_top_env;	1201	struct coro *coro = SvSTATE (coro_current);
769	PL_top_env = next->stack->top_env;	1202
770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1203	if (coro->throw)
		1204	{
		1205	SV *exception = coro->throw;
		1206	coro->throw = 0;
		1207	sv_setsv (ERRSV, exception);
		1208	croak (0);
		1209	}
771	}	1210	}
		1211	}
		1212	}
772		1213
773	free_coro_mortal ();	1214	struct transfer_args
		1215	{
		1216	struct coro *prev, *next;
		1217	};
774		1218
		1219	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1220	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1221
		1222	/** high level stuff ********************************************************/
		1223
		1224	static int
		1225	coro_state_destroy (pTHX_ struct coro *coro)
		1226	{
		1227	if (coro->flags & CF_DESTROYED)
		1228	return 0;
		1229
		1230	coro->flags |= CF_DESTROYED;
		1231
		1232	if (coro->flags & CF_READY)
		1233	{
		1234	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1235	/* alternative: look through all ready queues and remove the coro */
		1236	LOCK;
		1237	--coro_nready;
775	UNLOCK;	1238	UNLOCK;
776	}	1239	}
777	}	1240	else
778		1241	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
779	struct transfer_args
780	{
781	struct coro *prev, *next;
782	int flags;
783	};
784
785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
786
787	static void
788	coro_state_destroy (struct coro *coro)
789	{
790	if (coro->refcnt--)
791	return;
792		1242
793	if (coro->mainstack && coro->mainstack != main_mainstack)	1243	if (coro->mainstack && coro->mainstack != main_mainstack)
794	{	1244	{
795	struct coro temp;	1245	struct coro temp;
796		1246
797	SAVE ((&temp), TRANSFER_SAVE_ALL);	1247	if (coro->flags & CF_RUNNING)
798	LOAD (coro);	1248	croak ("FATAL: tried to destroy currently running coroutine");
799		1249
800	coro_destroy_stacks ();	1250	save_perl (aTHX_ &temp);
		1251	load_perl (aTHX_ coro);
801		1252
802	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1253	coro_destroy (aTHX_ coro);
803		1254
		1255	load_perl (aTHX_ &temp);
		1256
804	coro->mainstack = 0;	1257	coro->slot = 0;
805	}	1258	}
806		1259
807	stack_free (coro->stack);	1260	cctx_destroy (coro->cctx);
808	SvREFCNT_dec (coro->args);	1261	SvREFCNT_dec (coro->args);
809	Safefree (coro);	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
		1267	return 1;
810	}	1268	}
811		1269
812	static int	1270	static int
813	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1271	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814	{	1272	{
815	struct coro *coro = (struct coro *)mg->mg_ptr;	1273	struct coro *coro = (struct coro *)mg->mg_ptr;
816	mg->mg_ptr = 0;	1274	mg->mg_ptr = 0;
817		1275
		1276	coro->hv = 0;
		1277
		1278	if (--coro->refcnt < 0)
		1279	{
818	coro_state_destroy (coro);	1280	coro_state_destroy (aTHX_ coro);
		1281	Safefree (coro);
		1282	}
819		1283
820	return 0;	1284	return 0;
821	}	1285	}
822		1286
823	static int	1287	static int
…		…
830	return 0;	1294	return 0;
831	}	1295	}
832		1296
833	static MGVTBL coro_state_vtbl = {	1297	static MGVTBL coro_state_vtbl = {
834	0, 0, 0, 0,	1298	0, 0, 0, 0,
835	coro_state_clear,	1299	coro_state_free,
836	0,	1300	0,
837	#ifdef MGf_DUP	1301	#ifdef MGf_DUP
838	coro_state_dup,	1302	coro_state_dup,
839	#else	1303	#else
840	# define MGf_DUP 0	1304	# define MGf_DUP 0
841	#endif	1305	#endif
842	};	1306	};
843		1307
844	static struct coro *
845	SvSTATE (SV *coro)
846	{
847	HV *stash;
848	MAGIC *mg;
849
850	if (SvROK (coro))
851	coro = SvRV (coro);
852
853	stash = SvSTASH (coro);
854	if (stash != coro_stash && stash != coro_state_stash)
855	{
856	/* very slow, but rare, check */
857	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
858	croak ("Coro::State object required");
859	}
860
861	mg = SvMAGIC (coro);
862	assert (mg->mg_type == PERL_MAGIC_ext);
863	return (struct coro *)mg->mg_ptr;
864	}
865
866	static void	1308	static void
867	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1309	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
868	{	1310	{
869	ta->prev = SvSTATE (prev);	1311	ta->prev = SvSTATE (prev_sv);
870	ta->next = SvSTATE (next);	1312	ta->next = SvSTATE (next_sv);
871	ta->flags = flags;	1313	TRANSFER_CHECK (*ta);
872	}	1314	}
873		1315
874	static void	1316	static void
875	api_transfer (SV *prev, SV *next, int flags)	1317	api_transfer (SV *prev_sv, SV *next_sv)
876	{	1318	{
877	dTHX;	1319	dTHX;
878	struct transfer_args ta;	1320	struct transfer_args ta;
879		1321
880	prepare_transfer (&ta, prev, next, flags);	1322	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	1323	TRANSFER (ta);
882	}	1324	}
883		1325
884	/** Coro ********************************************************************/	1326	/** Coro ********************************************************************/
885		1327
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static GV *coro_current, *coro_idle;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	1328	static void
899	coro_enq (SV *sv)	1329	coro_enq (pTHX_ SV *coro_sv)
		1330	{
		1331	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1332	}
		1333
		1334	static SV *
		1335	coro_deq (pTHX)
900	{	1336	{
901	int prio;	1337	int prio;
902		1338
903	if (SvTYPE (sv) != SVt_PVHV)
904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
905
906	prio = SvSTATE (sv)->prio;
907
908	av_push (coro_ready [prio - PRIO_MIN], sv);
909	coro_nready++;
910	}
911
912	static SV *
913	coro_deq (int min_prio)
914	{
915	int prio = PRIO_MAX - PRIO_MIN;
916
917	min_prio -= PRIO_MIN;
918	if (min_prio < 0)
919	min_prio = 0;
920
921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1339	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
922	if (AvFILLp (coro_ready [prio]) >= 0)	1340	if (AvFILLp (coro_ready [prio]) >= 0)
923	{
924	coro_nready--;
925	return av_shift (coro_ready [prio]);	1341	return av_shift (coro_ready [prio]);
926	}
927		1342
928	return 0;	1343	return 0;
929	}	1344	}
930		1345
931	static void	1346	static int
932	api_ready (SV *coro)	1347	api_ready (SV *coro_sv)
933	{	1348	{
934	dTHX;	1349	dTHX;
		1350	struct coro *coro;
935		1351
936	if (SvROK (coro))	1352	if (SvROK (coro_sv))
937	coro = SvRV (coro);	1353	coro_sv = SvRV (coro_sv);
		1354
		1355	coro = SvSTATE (coro_sv);
		1356
		1357	if (coro->flags & CF_READY)
		1358	return 0;
		1359
		1360	coro->flags |= CF_READY;
938		1361
939	LOCK;	1362	LOCK;
940	coro_enq (SvREFCNT_inc (coro));	1363	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1364	++coro_nready;
941	UNLOCK;	1365	UNLOCK;
942	}
943		1366
		1367	return 1;
		1368	}
		1369
944	static void	1370	static int
		1371	api_is_ready (SV *coro_sv)
		1372	{
		1373	dTHX;
		1374	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1375	}
		1376
		1377	static void
945	prepare_schedule (struct transfer_args *ta)	1378	prepare_schedule (pTHX_ struct transfer_args *ta)
946	{	1379	{
947	SV *current, *prev, *next;	1380	SV *prev_sv, *next_sv;
948
949	current = GvSV (coro_current);
950		1381
951	for (;;)	1382	for (;;)
952	{	1383	{
953	LOCK;	1384	LOCK;
954	next = coro_deq (PRIO_MIN);	1385	next_sv = coro_deq (aTHX);
		1386
		1387	/* nothing to schedule: call the idle handler */
		1388	if (expect_false (!next_sv))
		1389	{
		1390	dSP;
		1391	UNLOCK;
		1392
		1393	ENTER;
		1394	SAVETMPS;
		1395
		1396	PUSHMARK (SP);
		1397	PUTBACK;
		1398	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1399
		1400	FREETMPS;
		1401	LEAVE;
		1402	continue;
		1403	}
		1404
		1405	ta->next = SvSTATE (next_sv);
		1406
		1407	/* cannot transfer to destroyed coros, skip and look for next */
		1408	if (expect_false (ta->next->flags & CF_DESTROYED))
		1409	{
		1410	UNLOCK;
		1411	SvREFCNT_dec (next_sv);
		1412	/* coro_nready is already taken care of by destroy */
		1413	continue;
		1414	}
		1415
		1416	--coro_nready;
955	UNLOCK;	1417	UNLOCK;
956
957	if (next)
958	break;	1418	break;
959
960	{
961	dSP;
962
963	ENTER;
964	SAVETMPS;
965
966	PUSHMARK (SP);
967	PUTBACK;
968	call_sv (GvSV (coro_idle), G_DISCARD);
969
970	FREETMPS;
971	LEAVE;
972	}	1419	}
973	}
974
975	prev = SvRV (current);
976	SvRV (current) = next;
977		1420
978	/* free this only after the transfer */	1421	/* free this only after the transfer */
		1422	prev_sv = SvRV (coro_current);
		1423	ta->prev = SvSTATE (prev_sv);
		1424	TRANSFER_CHECK (*ta);
		1425	assert (ta->next->flags & CF_READY);
		1426	ta->next->flags &= ~CF_READY;
		1427	SvRV_set (coro_current, next_sv);
		1428
979	LOCK;	1429	LOCK;
980	free_coro_mortal ();	1430	free_coro_mortal (aTHX);
		1431	coro_mortal = prev_sv;
981	UNLOCK;	1432	UNLOCK;
982	coro_mortal = prev;
983
984	ta->prev = SvSTATE (prev);
985	ta->next = SvSTATE (next);
986	ta->flags = TRANSFER_SAVE_ALL;
987	}	1433	}
988		1434
989	static void	1435	static void
990	prepare_cede (struct transfer_args *ta)	1436	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1437	{
992	LOCK;	1438	api_ready (coro_current);
993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994	UNLOCK;
995
996	prepare_schedule (ta);	1439	prepare_schedule (aTHX_ ta);
		1440	}
		1441
		1442	static int
		1443	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1444	{
		1445	if (coro_nready)
		1446	{
		1447	SV *prev = SvRV (coro_current);
		1448	prepare_schedule (aTHX_ ta);
		1449	api_ready (prev);
		1450	return 1;
		1451	}
		1452	else
		1453	return 0;
997	}	1454	}
998		1455
999	static void	1456	static void
1000	api_schedule (void)	1457	api_schedule (void)
1001	{	1458	{
1002	dTHX;	1459	dTHX;
1003	struct transfer_args ta;	1460	struct transfer_args ta;
1004		1461
1005	prepare_schedule (&ta);	1462	prepare_schedule (aTHX_ &ta);
1006	TRANSFER (ta);	1463	TRANSFER (ta);
1007	}	1464	}
1008		1465
1009	static void	1466	static int
1010	api_cede (void)	1467	api_cede (void)
1011	{	1468	{
1012	dTHX;	1469	dTHX;
1013	struct transfer_args ta;	1470	struct transfer_args ta;
1014		1471
1015	prepare_cede (&ta);	1472	prepare_cede (aTHX_ &ta);
		1473
		1474	if (expect_true (ta.prev != ta.next))
		1475	{
1016	TRANSFER (ta);	1476	TRANSFER (ta);
		1477	return 1;
		1478	}
		1479	else
		1480	return 0;
1017	}	1481	}
1018		1482
		1483	static int
		1484	api_cede_notself (void)
		1485	{
		1486	dTHX;
		1487	struct transfer_args ta;
		1488
		1489	if (prepare_cede_notself (aTHX_ &ta))
		1490	{
		1491	TRANSFER (ta);
		1492	return 1;
		1493	}
		1494	else
		1495	return 0;
		1496	}
		1497
		1498	static void
		1499	api_trace (SV *coro_sv, int flags)
		1500	{
		1501	dTHX;
		1502	struct coro *coro = SvSTATE (coro_sv);
		1503
		1504	if (flags & CC_TRACE)
		1505	{
		1506	if (!coro->cctx)
		1507	coro->cctx = cctx_new ();
		1508	else if (!(coro->cctx->flags & CC_TRACE))
		1509	croak ("cannot enable tracing on coroutine with custom stack");
		1510
		1511	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1512	}
		1513	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1514	{
		1515	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1516
		1517	if (coro->flags & CF_RUNNING)
		1518	PL_runops = RUNOPS_DEFAULT;
		1519	else
		1520	coro->slot->runops = RUNOPS_DEFAULT;
		1521	}
		1522	}
		1523
1019	MODULE = Coro::State PACKAGE = Coro::State	1524	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1020		1525
1021	PROTOTYPES: DISABLE	1526	PROTOTYPES: DISABLE
1022		1527
1023	BOOT:	1528	BOOT:
1024	{	1529	{
1025	#ifdef USE_ITHREADS	1530	#ifdef USE_ITHREADS
1026	MUTEX_INIT (&coro_mutex);	1531	MUTEX_INIT (&coro_mutex);
1027	#endif	1532	#endif
1028	BOOT_PAGESIZE;	1533	BOOT_PAGESIZE;
1029		1534
		1535	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1536	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1537	#if 0
		1538	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1539	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1540	#endif
		1541	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1542	rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1543	rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1544
1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1545	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031		1546
1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1547	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1548	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1549	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1550	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1035		1551
1036	main_mainstack = PL_mainstack;	1552	main_mainstack = PL_mainstack;
		1553	main_top_env = PL_top_env;
		1554
		1555	while (main_top_env->je_prev)
		1556	main_top_env = main_top_env->je_prev;
1037		1557
1038	coroapi.ver = CORO_API_VERSION;	1558	coroapi.ver = CORO_API_VERSION;
		1559	coroapi.rev = CORO_API_REVISION;
1039	coroapi.transfer = api_transfer;	1560	coroapi.transfer = api_transfer;
1040		1561
1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1562	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1042	}	1563	}
1043		1564
1044	SV *	1565	SV *
1045	new (char *klass, ...)	1566	new (char *klass, ...)
1046	CODE:	1567	CODE:
1047	{	1568	{
1048	struct coro *coro;	1569	struct coro *coro;
		1570	MAGIC *mg;
1049	HV *hv;	1571	HV *hv;
1050	int i;	1572	int i;
1051		1573
1052	Newz (0, coro, 1, struct coro);	1574	Newz (0, coro, 1, struct coro);
1053	coro->args = newAV ();	1575	coro->args = newAV ();
		1576	coro->flags = CF_NEW;
1054		1577
		1578	if (coro_first) coro_first->prev = coro;
		1579	coro->next = coro_first;
		1580	coro_first = coro;
		1581
1055	hv = newHV ();	1582	coro->hv = hv = newHV ();
1056	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1583	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1584	mg->mg_flags |= MGf_DUP;
1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1585	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058		1586
		1587	av_extend (coro->args, items - 1);
1059	for (i = 1; i < items; i++)	1588	for (i = 1; i < items; i++)
1060	av_push (coro->args, newSVsv (ST (i)));	1589	av_push (coro->args, newSVsv (ST (i)));
1061
1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1063	/*coro->stack = 0;*/
1064	}	1590	}
1065	OUTPUT:	1591	OUTPUT:
1066	RETVAL	1592	RETVAL
1067		1593
		1594	# these not obviously related functions are all rolled into the same xs
		1595	# function to increase chances that they all will call transfer with the same
		1596	# stack offset
1068	void	1597	void
1069	_set_stacklevel (...)	1598	_set_stacklevel (...)
1070	ALIAS:	1599	ALIAS:
1071	Coro::State::transfer = 1	1600	Coro::State::transfer = 1
1072	Coro::schedule = 2	1601	Coro::schedule = 2
1073	Coro::cede = 3	1602	Coro::cede = 3
1074	Coro::Cont::yield = 4	1603	Coro::cede_notself = 4
1075	CODE:	1604	CODE:
1076	{	1605	{
1077	struct transfer_args ta;	1606	struct transfer_args ta;
1078		1607
1079	switch (ix)	1608	switch (ix)
1080	{	1609	{
1081	case 0:	1610	case 0:
1082	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1611	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1083	ta.next = 0;	1612	ta.next = 0;
1084	ta.flags = TRANSFER_SET_STACKLEVEL;
1085	break;	1613	break;
1086		1614
1087	case 1:	1615	case 1:
1088	if (items != 3)	1616	if (items != 2)
1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1617	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1090		1618
1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1619	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1092	break;	1620	break;
1093		1621
1094	case 2:	1622	case 2:
1095	prepare_schedule (&ta);	1623	prepare_schedule (aTHX_ &ta);
1096	break;	1624	break;
1097		1625
1098	case 3:	1626	case 3:
1099	prepare_cede (&ta);	1627	prepare_cede (aTHX_ &ta);
1100	break;	1628	break;
1101		1629
1102	case 4:	1630	case 4:
1103	{	1631	if (!prepare_cede_notself (aTHX_ &ta))
1104	SV *yieldstack;	1632	XSRETURN_EMPTY;
1105	SV *sv;
1106	AV *defav = GvAV (PL_defgv);
1107		1633
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123	ta.flags = 0;
1124	SvREFCNT_dec (sv);
1125	}
1126	break;	1634	break;
1127
1128	}	1635	}
1129		1636
		1637	BARRIER;
		1638	PUTBACK;
1130	TRANSFER (ta);	1639	TRANSFER (ta);
		1640	SPAGAIN; /* might be the sp of a different coroutine now */
		1641	/* be extra careful not to ever do anything after TRANSFER */
1131	}	1642	}
1132		1643
1133	void	1644	bool
1134	_clone_state_from (SV *dst, SV *src)	1645	_destroy (SV *coro_sv)
1135	CODE:	1646	CODE:
1136	{	1647	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1137	struct coro *coro_src = SvSTATE (src);	1648	OUTPUT:
1138		1649	RETVAL
1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1140
1141	++coro_src->refcnt;
1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1143	}
1144		1650
1145	void	1651	void
1146	_exit (code)	1652	_exit (code)
1147	int code	1653	int code
1148	PROTOTYPE: $	1654	PROTOTYPE: $
1149	CODE:	1655	CODE:
1150	_exit (code);	1656	_exit (code);
1151		1657
		1658	int
		1659	cctx_stacksize (int new_stacksize = 0)
		1660	CODE:
		1661	RETVAL = coro_stacksize;
		1662	if (new_stacksize)
		1663	coro_stacksize = new_stacksize;
		1664	OUTPUT:
		1665	RETVAL
		1666
		1667	int
		1668	cctx_count ()
		1669	CODE:
		1670	RETVAL = cctx_count;
		1671	OUTPUT:
		1672	RETVAL
		1673
		1674	int
		1675	cctx_idle ()
		1676	CODE:
		1677	RETVAL = cctx_idle;
		1678	OUTPUT:
		1679	RETVAL
		1680
		1681	void
		1682	list ()
		1683	PPCODE:
		1684	{
		1685	struct coro *coro;
		1686	for (coro = coro_first; coro; coro = coro->next)
		1687	if (coro->hv)
		1688	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1689	}
		1690
		1691	void
		1692	call (Coro::State coro, SV *coderef)
		1693	ALIAS:
		1694	eval = 1
		1695	CODE:
		1696	{
		1697	if (coro->mainstack)
		1698	{
		1699	struct coro temp;
		1700
		1701	if (!(coro->flags & CF_RUNNING))
		1702	{
		1703	save_perl (aTHX_ &temp);
		1704	load_perl (aTHX_ coro);
		1705	}
		1706
		1707	{
		1708	dSP;
		1709	ENTER;
		1710	SAVETMPS;
		1711	PUTBACK;
		1712	PUSHSTACK;
		1713	PUSHMARK (SP);
		1714
		1715	if (ix)
		1716	eval_sv (coderef, 0);
		1717	else
		1718	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1719
		1720	POPSTACK;
		1721	SPAGAIN;
		1722	FREETMPS;
		1723	LEAVE;
		1724	PUTBACK;
		1725	}
		1726
		1727	if (!(coro->flags & CF_RUNNING))
		1728	{
		1729	save_perl (aTHX_ coro);
		1730	load_perl (aTHX_ &temp);
		1731	}
		1732	}
		1733	}
		1734
		1735	SV *
		1736	is_ready (Coro::State coro)
		1737	PROTOTYPE: $
		1738	ALIAS:
		1739	is_ready = CF_READY
		1740	is_running = CF_RUNNING
		1741	is_new = CF_NEW
		1742	is_destroyed = CF_DESTROYED
		1743	CODE:
		1744	RETVAL = boolSV (coro->flags & ix);
		1745	OUTPUT:
		1746	RETVAL
		1747
		1748	void
		1749	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1750
		1751	SV *
		1752	has_stack (Coro::State coro)
		1753	PROTOTYPE: $
		1754	CODE:
		1755	RETVAL = boolSV (!!coro->cctx);
		1756	OUTPUT:
		1757	RETVAL
		1758
		1759	int
		1760	is_traced (Coro::State coro)
		1761	PROTOTYPE: $
		1762	CODE:
		1763	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1764	OUTPUT:
		1765	RETVAL
		1766
		1767	IV
		1768	rss (Coro::State coro)
		1769	PROTOTYPE: $
		1770	ALIAS:
		1771	usecount = 1
		1772	CODE:
		1773	switch (ix)
		1774	{
		1775	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1776	case 1: RETVAL = coro->usecount; break;
		1777	}
		1778	OUTPUT:
		1779	RETVAL
		1780
		1781
1152	MODULE = Coro::State PACKAGE = Coro	1782	MODULE = Coro::State PACKAGE = Coro
1153		1783
1154	BOOT:	1784	BOOT:
1155	{	1785	{
1156	int i;	1786	int i;
1157		1787
		1788	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1789	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1790	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1791
		1792	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1793	SvREADONLY_on (coro_current);
		1794
1158	coro_stash = gv_stashpv ("Coro", TRUE);	1795	coro_stash = gv_stashpv ("Coro", TRUE);
1159		1796
1160	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1797	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1161	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1798	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1799	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1800	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1801	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1802	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1166		1803
1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1169
1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1804	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171	coro_ready[i] = newAV ();	1805	coro_ready[i] = newAV ();
1172		1806
1173	{	1807	{
1174	SV *sv = perl_get_sv("Coro::API", 1);	1808	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1809	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1175		1810
1176	coroapi.schedule = api_schedule;	1811	coroapi.schedule = api_schedule;
1177	coroapi.cede = api_cede;	1812	coroapi.cede = api_cede;
		1813	coroapi.cede_notself = api_cede_notself;
1178	coroapi.ready = api_ready;	1814	coroapi.ready = api_ready;
		1815	coroapi.is_ready = api_is_ready;
1179	coroapi.nready = &coro_nready;	1816	coroapi.nready = &coro_nready;
1180	coroapi.current = coro_current;	1817	coroapi.current = coro_current;
1181		1818
1182	GCoroAPI = &coroapi;	1819	GCoroAPI = &coroapi;
1183	sv_setiv (sv, (IV)&coroapi);	1820	sv_setiv (sv, (IV)&coroapi);
1184	SvREADONLY_on (sv);	1821	SvREADONLY_on (sv);
1185	}	1822	}
1186	}	1823	}
		1824
		1825	void
		1826	_set_current (SV *current)
		1827	PROTOTYPE: $
		1828	CODE:
		1829	SvREFCNT_dec (SvRV (coro_current));
		1830	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1187		1831
1188	int	1832	int
1189	prio (Coro::State coro, int newprio = 0)	1833	prio (Coro::State coro, int newprio = 0)
1190	ALIAS:	1834	ALIAS:
1191	nice = 1	1835	nice = 1
…		…
1194	RETVAL = coro->prio;	1838	RETVAL = coro->prio;
1195		1839
1196	if (items > 1)	1840	if (items > 1)
1197	{	1841	{
1198	if (ix)	1842	if (ix)
1199	newprio += coro->prio;	1843	newprio = coro->prio - newprio;
1200		1844
1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1845	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1846	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1203		1847
1204	coro->prio = newprio;	1848	coro->prio = newprio;
1205	}	1849	}
1206	}	1850	}
		1851	OUTPUT:
		1852	RETVAL
1207		1853
1208	void	1854	SV *
1209	ready (SV *self)	1855	ready (SV *self)
1210	PROTOTYPE: $	1856	PROTOTYPE: $
1211	CODE:	1857	CODE:
1212	api_ready (self);	1858	RETVAL = boolSV (api_ready (self));
		1859	OUTPUT:
		1860	RETVAL
1213		1861
1214	int	1862	int
1215	nready (...)	1863	nready (...)
1216	PROTOTYPE:	1864	PROTOTYPE:
1217	CODE:	1865	CODE:
1218	RETVAL = coro_nready;	1866	RETVAL = coro_nready;
1219	OUTPUT:	1867	OUTPUT:
1220	RETVAL	1868	RETVAL
1221		1869
		1870	void
		1871	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1872	PROTOTYPE: $;$
		1873	CODE:
		1874	SvREFCNT_dec (self->throw);
		1875	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1876
		1877	# for async_pool speedup
		1878	void
		1879	_pool_1 (SV *cb)
		1880	CODE:
		1881	{
		1882	struct coro *coro = SvSTATE (coro_current);
		1883	HV *hv = (HV *)SvRV (coro_current);
		1884	AV *defav = GvAV (PL_defgv);
		1885	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1886	AV *invoke_av;
		1887	int i, len;
		1888
		1889	if (!invoke)
		1890	croak ("\3async_pool terminate\2\n");
		1891
		1892	SvREFCNT_dec (coro->saved_deffh);
		1893	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1894
		1895	hv_store (hv, "desc", sizeof ("desc") - 1,
		1896	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1897
		1898	invoke_av = (AV *)SvRV (invoke);
		1899	len = av_len (invoke_av);
		1900
		1901	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1902
		1903	if (len > 0)
		1904	{
		1905	av_fill (defav, len - 1);
		1906	for (i = 0; i < len; ++i)
		1907	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1908	}
		1909
		1910	SvREFCNT_dec (invoke);
		1911	}
		1912
		1913	void
		1914	_pool_2 (SV *cb)
		1915	CODE:
		1916	{
		1917	struct coro *coro = SvSTATE (coro_current);
		1918
		1919	sv_setsv (cb, &PL_sv_undef);
		1920
		1921	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1922	coro->saved_deffh = 0;
		1923
		1924	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1925	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1926	croak ("\3async_pool terminate\2\n");
		1927
		1928	av_clear (GvAV (PL_defgv));
		1929	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1930	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1931
		1932	coro->prio = 0;
		1933
		1934	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1935	api_trace (coro_current, 0);
		1936
		1937	av_push (av_async_pool, newSVsv (coro_current));
		1938	}
		1939
		1940
1222	MODULE = Coro::State PACKAGE = Coro::AIO	1941	MODULE = Coro::State PACKAGE = Coro::AIO
1223		1942
1224	SV *	1943	SV *
1225	_get_state ()	1944	_get_state ()
1226	CODE:	1945	CODE:
1227	{	1946	{
1228	struct {	1947	struct io_state *data;
1229	int errorno;
1230	int laststype;
1231	int laststatval;
1232	Stat_t statcache;
1233	} data;
1234		1948
		1949	RETVAL = newSV (sizeof (struct io_state));
		1950	data = (struct io_state *)SvPVX (RETVAL);
		1951	SvCUR_set (RETVAL, sizeof (struct io_state));
		1952	SvPOK_only (RETVAL);
		1953
1235	data.errorno = errno;	1954	data->errorno = errno;
1236	data.laststype = PL_laststype;	1955	data->laststype = PL_laststype;
1237	data.laststatval = PL_laststatval;	1956	data->laststatval = PL_laststatval;
1238	data.statcache = PL_statcache;	1957	data->statcache = PL_statcache;
1239
1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
1241	}	1958	}
1242	OUTPUT:	1959	OUTPUT:
1243	RETVAL	1960	RETVAL
1244		1961
1245	void	1962	void
1246	_set_state (char *data_)	1963	_set_state (char *data_)
1247	PROTOTYPE: $	1964	PROTOTYPE: $
1248	CODE:	1965	CODE:
1249	{	1966	{
1250	struct {	1967	struct io_state *data = (void *)data_;
1251	int errorno;
1252	int laststype;
1253	int laststatval;
1254	Stat_t statcache;
1255	} *data = (void *)data_;
1256		1968
1257	errno = data->errorno;	1969	errno = data->errorno;
1258	PL_laststype = data->laststype;	1970	PL_laststype = data->laststype;
1259	PL_laststatval = data->laststatval;	1971	PL_laststatval = data->laststatval;
1260	PL_statcache = data->statcache;	1972	PL_statcache = data->statcache;
1261	}	1973	}
		1974

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