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Comparing Coro/Coro/State.xs (file contents):
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC vs.
Revision 1.212 by root, Wed Oct 10 04:21:33 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	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
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	|| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
14	# endif	59	# endif
15	# ifndef call_sv	60	# ifndef call_sv
16	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
29	# endif	74	# endif
30	#endif	75	#endif
31		76
32	#include <stdio.h>	77	/* 5.8.7 */
33	#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
34		89
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	91	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	92	#endif
53	# include <limits.h>	93
54	# ifndef PAGESIZE	94	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	95	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	96	#endif
61	#endif
62		97
63	/* The next macro should declare a variable stacklevel that contains and approximation	98	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* 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. */
66	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
68		107
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		109
		110	#if __GNUC__ >= 3
		111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
		114	#else
		115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
		118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
		122
		123	#define NOINLINE attribute ((noinline))
		124
71	#include "CoroAPI.h"	125	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		126
75	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	131	#else
80	# define LOCK (void)0	132	# define LOCK (void)0
81	# define UNLOCK (void)0	133	# define UNLOCK (void)0
82	#endif	134	#endif
83		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;
84	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
85	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;
86	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	150	static SV *coro_mortal; /* will be freed after next transfer */
88		151
		152	static GV *irsgv; /* $/ */
		153	static GV *stdoutgv; /* *STDOUT */
		154
		155	static HV *hv_sig; /* %SIG */
		156	static SV *sv_diehook;
		157	static SV *sv_warnhook;
		158
		159	/* async_pool helper stuff */
		160	static SV *sv_pool_rss;
		161	static SV *sv_pool_size;
		162	static AV *av_async_pool;
		163
		164	static struct coro_cctx *cctx_first;
		165	static int cctx_count, cctx_idle;
		166
		167	enum {
		168	CC_MAPPED = 0x01,
		169	CC_NOREUSE = 0x02, /* throw this away after tracing */
		170	CC_TRACE = 0x04,
		171	CC_TRACE_SUB = 0x08, /* trace sub calls */
		172	CC_TRACE_LINE = 0x10, /* trace each statement */
		173	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		174	};
		175
89	/* this is a structure representing a c-level coroutine */	176	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	177	typedef struct coro_cctx {
91	struct coro_stack *next;	178	struct coro_cctx *next;
92		179
93	/* the stack */	180	/* the stack */
94	void *sptr;	181	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	182	size_t ssize;
96		183
97	/* cpu state */	184	/* cpu state */
98	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	185	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		186	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	187	JMPENV *top_env;
100	coro_context cctx;	188	coro_context cctx;
101	} coro_stack;	189
		190	#if CORO_USE_VALGRIND
		191	int valgrind_id;
		192	#endif
		193	unsigned char flags;
		194	} coro_cctx;
		195
		196	enum {
		197	CF_RUNNING = 0x0001, /* coroutine is running */
		198	CF_READY = 0x0002, /* coroutine is ready */
		199	CF_NEW = 0x0004, /* has never been switched to */
		200	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		201	};
		202
		203	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		204	typedef struct {
		205	SV *defsv;
		206	AV *defav;
		207	SV *errsv;
		208	SV *irsgv;
		209	#define VAR(name,type) type name;
		210	# include "state.h"
		211	#undef VAR
		212	} perl_slots;
		213
		214	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102		215
103	/* this is a structure representing a perl-level coroutine */	216	/* this is a structure representing a perl-level coroutine */
104	struct coro {	217	struct coro {
105	/* the c coroutine allocated to this perl coroutine, if any */	218	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	219	coro_cctx *cctx;
107		220
108	/* data associated with this coroutine (initial args) */	221	/* process data */
109	AV *args;
110	int refcnt;
111
112	/* optionally saved, might be zero */
113	AV *defav;
114	SV *defsv;
115	SV *errsv;
116
117	/* saved global state not related to stacks */
118	U8 dowarn;
119	I32 in_eval;
120
121	/* the stacks and related info (callchain etc..) */
122	PERL_SI *curstackinfo;
123	AV *curstack;
124	AV *mainstack;	222	AV *mainstack;
125	SV **stack_sp;	223	perl_slots *slot; /* basically the saved sp */
126	OP *op;	224
127	SV **curpad;	225	AV *args; /* data associated with this coroutine (initial args) */
128	AV *comppad;	226	int refcnt; /* coroutines are refcounted, yes */
129	CV *compcv;	227	int flags; /* CF_ flags */
130	SV **stack_base;	228	HV *hv; /* the perl hash associated with this coro, if any */
131	SV **stack_max;	229
132	SV **tmps_stack;	230	/* statistics */
133	I32 tmps_floor;	231	int usecount; /* number of transfers to this coro */
134	I32 tmps_ix;
135	I32 tmps_max;
136	I32 *markstack;
137	I32 *markstack_ptr;
138	I32 *markstack_max;
139	I32 *scopestack;
140	I32 scopestack_ix;
141	I32 scopestack_max;
142	ANY *savestack;
143	I32 savestack_ix;
144	I32 savestack_max;
145	OP **retstack;
146	I32 retstack_ix;
147	I32 retstack_max;
148	PMOP *curpm;
149	COP *curcop;
150		232
151	/* coro process data */	233	/* coro process data */
152	int prio;	234	int prio;
		235	SV *throw; /* exception to be thrown */
		236
		237	/* async_pool */
		238	SV *saved_deffh;
		239
		240	/* linked list */
		241	struct coro *next, *prev;
153	};	242	};
154		243
155	typedef struct coro *Coro__State;	244	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	245	typedef struct coro *Coro__State_or_hashref;
157		246
		247	/** Coro ********************************************************************/
		248
		249	#define PRIO_MAX 3
		250	#define PRIO_HIGH 1
		251	#define PRIO_NORMAL 0
		252	#define PRIO_LOW -1
		253	#define PRIO_IDLE -3
		254	#define PRIO_MIN -4
		255
		256	/* for Coro.pm */
		257	static SV *coro_current;
		258	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		259	static int coro_nready;
		260	static struct coro *coro_first;
		261
		262	/** lowlevel stuff **********************************************************/
		263
		264	static SV *
		265	coro_get_sv (const char *name, int create)
		266	{
		267	#if PERL_VERSION_ATLEAST (5,9,0)
		268	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		269	get_sv (name, create);
		270	#endif
		271	return get_sv (name, create);
		272	}
		273
		274	static AV *
		275	coro_get_av (const char *name, int create)
		276	{
		277	#if PERL_VERSION_ATLEAST (5,9,0)
		278	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		279	get_av (name, create);
		280	#endif
		281	return get_av (name, create);
		282	}
		283
		284	static HV *
		285	coro_get_hv (const char *name, int create)
		286	{
		287	#if PERL_VERSION_ATLEAST (5,9,0)
		288	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		289	get_hv (name, create);
		290	#endif
		291	return get_hv (name, create);
		292	}
		293
158	static AV *	294	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	295	coro_clone_padlist (pTHX_ CV *cv)
160	{	296	{
161	AV *padlist = CvPADLIST (cv);	297	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	298	AV *newpadlist, *newpad;
163		299
164	newpadlist = newAV ();	300	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	301	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	302	#if PERL_VERSION_ATLEAST (5,9,0)
		303	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		304	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	306	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	307	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	308	--AvFILLp (padlist);
173		309
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	310	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		354
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	355	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		356
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	357	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		358
		359	#define CORO_MAGIC(cv) \
		360	SvMAGIC (cv) \
		361	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		362	? SvMAGIC (cv) \
		363	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		364	: 0
		365
		366	static struct coro *
		367	SvSTATE_ (pTHX_ SV *coro)
		368	{
		369	HV *stash;
		370	MAGIC *mg;
		371
		372	if (SvROK (coro))
		373	coro = SvRV (coro);
		374
		375	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		376	croak ("Coro::State object required");
		377
		378	stash = SvSTASH (coro);
		379	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		380	{
		381	/* very slow, but rare, check */
		382	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		383	croak ("Coro::State object required");
		384	}
		385
		386	mg = CORO_MAGIC (coro);
		387	return (struct coro *)mg->mg_ptr;
		388	}
		389
		390	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		391
223	/* the next two functions merely cache the padlists */	392	/* the next two functions merely cache the padlists */
224	static void	393	static void
225	get_padlist (pTHX_ CV *cv)	394	get_padlist (pTHX_ CV *cv)
226	{	395	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	396	MAGIC *mg = CORO_MAGIC (cv);
		397	AV *av;
228		398
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	399	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	400	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	401	else
232	{	402	{
233	#if 0	403	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this is probably cleaner, but also slower? */	404	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	405	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	406	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	407	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	408	SvREFCNT_dec (cp);
239	#else	409	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	410	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	413	}
244		414
245	static void	415	static void
246	put_padlist (pTHX_ CV *cv)	416	put_padlist (pTHX_ CV *cv)
247	{	417	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	418	MAGIC *mg = CORO_MAGIC (cv);
		419	AV *av;
249		420
250	if (!mg)	421	if (expect_false (!mg))
251	{	422	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	423	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	424	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	425	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	426	mg->mg_obj = (SV *)newAV ();
256	}	427	}
257		428
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	429	av = (AV *)mg->mg_obj;
259	}
260		430
261	#define SB do {	431	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	432	av_extend (av, AvMAX (av) + 1);
263		433
264	#define LOAD(state) load_state(aTHX_ (state));	434	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	435	}
266		436
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	437	/** load & save, init *******************************************************/
268		438
269	static void	439	static void
270	load_state(pTHX_ Coro__State c)	440	load_perl (pTHX_ Coro__State c)
271	{	441	{
272	PL_dowarn = c->dowarn;	442	perl_slots *slot = c->slot;
273	PL_in_eval = c->in_eval;	443	c->slot = 0;
274		444
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;	445	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305		446
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	447	GvSV (PL_defgv) = slot->defsv;
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	448	GvAV (PL_defgv) = slot->defav;
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	449	GvSV (PL_errgv) = slot->errsv;
		450	GvSV (irsgv) = slot->irsgv;
		451
		452	#define VAR(name,type) PL_ ## name = slot->name;
		453	# include "state.h"
		454	#undef VAR
		455
		456	/*hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);*/
		457	/*hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);*/
309		458
310	{	459	{
311	dSP;	460	dSP;
		461
312	CV *cv;	462	CV *cv;
313		463
314	/* now do the ugly restore mess */	464	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	465	while (expect_true (cv = (CV *)POPs))
316	{	466	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	467	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	468	CvDEPTH (cv) = PTR2IV (POPs);
323	}	469	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	470	}
327		471
328	PUTBACK;	472	PUTBACK;
329	}	473	}
330	}	474	}
331		475
332	static void	476	static void
333	save_state(pTHX_ Coro__State c, int flags)	477	save_perl (pTHX_ Coro__State c)
334	{	478	{
335	{	479	{
336	dSP;	480	dSP;
337	I32 cxix = cxstack_ix;	481	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	482	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	485	/*
342	* the worst thing you can imagine happens first - we have to save	486	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	487	* (and reinitialize) all cv's in the whole callchain :(
344	*/	488	*/
345		489
346	PUSHs (Nullsv);	490	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	491	/* this loop was inspired by pp_caller */
348	for (;;)	492	for (;;)
349	{	493	{
350	while (cxix >= 0)	494	while (expect_true (cxix >= 0))
351	{	495	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	496	PERL_CONTEXT *cx = &ccstk[cxix--];
353		497
354	if (CxTYPE(cx) == CXt_SUB)	498	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355	{	499	{
356	CV *cv = cx->blk_sub.cv;	500	CV *cv = cx->blk_sub.cv;
		501
357	if (CvDEPTH(cv))	502	if (expect_true (CvDEPTH (cv)))
358	{	503	{
359	EXTEND (SP, CvDEPTH(cv)*2);	504	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	505	PUSHs ((SV *)CvPADLIST (cv));
		506	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	507	PUSHs ((SV *)cv);
370		508
		509	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	510	get_padlist (aTHX_ cv);
372	}	511	}
373	}	512	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	513	}
383		514
384	if (top_si->si_type == PERLSI_MAIN)	515	if (expect_true (top_si->si_type == PERLSI_MAIN))
385	break;	516	break;
386		517
387	top_si = top_si->si_prev;	518	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	519	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	520	cxix = top_si->si_cxix;
390	}	521	}
391		522
392	PUTBACK;	523	PUTBACK;
393	}	524	}
394		525
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	526	/* allocate some space on the context stack for our purposes */
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	527	/* we manually unroll here, as usually 2 slots is enough */
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	528	if (SLOT_COUNT >= 1) CXINC;
		529	if (SLOT_COUNT >= 2) CXINC;
		530	if (SLOT_COUNT >= 3) CXINC;
		531	{
		532	int i;
		533	for (i = 3; i < SLOT_COUNT; ++i)
		534	CXINC;
		535	}
		536	cxstack_ix -= SLOT_COUNT; /* undo allocation */
398		537
399	c->dowarn = PL_dowarn;
400	c->in_eval = PL_in_eval;
401
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;	538	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;	539
406	c->op = PL_op;	540	{
407	c->curpad = PL_curpad;	541	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408	c->comppad = PL_comppad;	542
409	c->compcv = PL_compcv;	543	slot->defav = GvAV (PL_defgv);
410	c->stack_base = PL_stack_base;	544	slot->defsv = DEFSV;
411	c->stack_max = PL_stack_max;	545	slot->errsv = ERRSV;
412	c->tmps_stack = PL_tmps_stack;	546	slot->irsgv = GvSV (irsgv);
413	c->tmps_floor = PL_tmps_floor;	547
414	c->tmps_ix = PL_tmps_ix;	548	#define VAR(name,type) slot->name = PL_ ## name;
415	c->tmps_max = PL_tmps_max;	549	# include "state.h"
416	c->markstack = PL_markstack;	550	#undef VAR
417	c->markstack_ptr = PL_markstack_ptr;	551	}
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	}	552	}
433		553
434	/*	554	/*
435	* allocate various perl stacks. This is an exact copy	555	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	556	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	557	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	558	* not usually need a lot of stackspace.
439	*/	559	*/
		560	#if CORO_PREFER_PERL_FUNCTIONS
		561	# define coro_init_stacks init_stacks
		562	#else
440	static void	563	static void
441	coro_init_stacks (pTHX)	564	coro_init_stacks (pTHX)
442	{	565	{
443	LOCK;	566	PL_curstackinfo = new_stackinfo(32, 8);
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446	PL_curstackinfo->si_type = PERLSI_MAIN;	567	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	568	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	569	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		570
450	PL_stack_base = AvARRAY(PL_curstack);	571	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	572	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	573	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		574
454	New(50,PL_tmps_stack,96,SV*);	575	New(50,PL_tmps_stack,32,SV*);
455	PL_tmps_floor = -1;	576	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	577	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	578	PL_tmps_max = 32;
458		579
459	New(54,PL_markstack,16,I32);	580	New(54,PL_markstack,16,I32);
460	PL_markstack_ptr = PL_markstack;	581	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	582	PL_markstack_max = PL_markstack + 16;
462		583
463	#ifdef SET_MARK_OFFSET	584	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	585	SET_MARK_OFFSET;
465	#endif	586	#endif
466		587
467	New(54,PL_scopestack,16,I32);	588	New(54,PL_scopestack,8,I32);
468	PL_scopestack_ix = 0;	589	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	590	PL_scopestack_max = 8;
470		591
471	New(54,PL_savestack,96,ANY);	592	New(54,PL_savestack,24,ANY);
472	PL_savestack_ix = 0;	593	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	594	PL_savestack_max = 24;
474		595
475	#if PERL_VERSION < 9	596	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	597	New(54,PL_retstack,4,OP*);
477	PL_retstack_ix = 0;	598	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	599	PL_retstack_max = 4;
479	#endif	600	#endif
480
481	UNLOCK;
482	}	601	}
		602	#endif
483		603
484	/*	604	/*
485	* destroy the stacks, the callchain etc...	605	* destroy the stacks, the callchain etc...
486	*/	606	*/
487	static void	607	static void
488	destroy_stacks(pTHX)	608	coro_destroy_stacks (pTHX)
489	{	609	{
490	if (!IN_DESTRUCT)
491	{
492	/* is this ugly, I ask? */
493	LEAVE_SCOPE (0);
494
495	/* sure it is, but more important: is it correct?? :/ */
496	FREETMPS;
497
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499	}
500
501	while (PL_curstackinfo->si_next)	610	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	611	PL_curstackinfo = PL_curstackinfo->si_next;
503		612
504	while (PL_curstackinfo)	613	while (PL_curstackinfo)
505	{	614	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	615	PERL_SI *p = PL_curstackinfo->si_prev;
507		616
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	617	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	618	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		619
520	Safefree (PL_curstackinfo->si_cxstack);	620	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	621	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	622	PL_curstackinfo = p;
523	}	623	}
524		624
525	Safefree (PL_tmps_stack);	625	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	626	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	627	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	628	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	629	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	630	Safefree (PL_retstack);
531	#endif	631	#endif
532	}	632	}
533		633
534	static void	634	static size_t
535	setup_coro (struct coro *coro)	635	coro_rss (pTHX_ struct coro *coro)
		636	{
		637	size_t rss = sizeof (*coro);
		638
		639	if (coro->mainstack)
		640	{
		641	perl_slots tmp_slot;
		642	perl_slots *slot;
		643
		644	if (coro->flags & CF_RUNNING)
		645	{
		646	slot = &tmp_slot;
		647
		648	#define VAR(name,type) slot->name = PL_ ## name;
		649	# include "state.h"
		650	#undef VAR
		651	}
		652	else
		653	slot = coro->slot;
		654
		655	rss += sizeof (slot->curstackinfo);
		656	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		657	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		658	rss += slot->tmps_max * sizeof (SV *);
		659	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		660	rss += slot->scopestack_max * sizeof (I32);
		661	rss += slot->savestack_max * sizeof (ANY);
		662
		663	#if !PERL_VERSION_ATLEAST (5,9,0)
		664	rss += slot->retstack_max * sizeof (OP *);
		665	#endif
		666	}
		667
		668	return rss;
		669	}
		670
		671	/** coroutine stack handling ************************************************/
		672
		673	static void
		674	coro_setup (pTHX_ struct coro *coro)
536	{	675	{
537	/*	676	/*
538	* emulate part of the perl startup here.	677	* emulate part of the perl startup here.
539	*/	678	*/
540	dTHX;	679	coro_init_stacks (aTHX);
		680
		681	PL_runops = RUNOPS_DEFAULT;
		682	PL_curcop = &PL_compiling;
		683	PL_in_eval = EVAL_NULL;
		684	PL_comppad = 0;
		685	PL_curpm = 0;
		686	PL_curpad = 0;
		687	PL_localizing = 0;
		688	PL_dirty = 0;
		689	PL_restartop = 0;
		690	PL_diehook = 0; hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);
		691	PL_warnhook = 0; hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);
		692
		693	GvSV (PL_defgv) = newSV (0);
		694	GvAV (PL_defgv) = coro->args; coro->args = 0;
		695	GvSV (PL_errgv) = newSV (0);
		696	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		697	PL_rs = newSVsv (GvSV (irsgv));
		698	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		699
		700	{
		701	dSP;
		702	LOGOP myop;
		703
		704	Zero (&myop, 1, LOGOP);
		705	myop.op_next = Nullop;
		706	myop.op_flags = OPf_WANT_VOID;
		707
		708	PUSHMARK (SP);
		709	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		710	PUTBACK;
		711	PL_op = (OP *)&myop;
		712	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		713	SPAGAIN;
		714	}
		715
		716	/* this newly created coroutine might be run on an existing cctx which most
		717	* likely was suspended in set_stacklevel, called from entersub.
		718	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		719	* so we ENTER here for symmetry
		720	*/
		721	ENTER;
		722	}
		723
		724	static void
		725	coro_destroy (pTHX_ struct coro *coro)
		726	{
		727	if (!IN_DESTRUCT)
		728	{
		729	/* restore all saved variables and stuff */
		730	LEAVE_SCOPE (0);
		731	assert (PL_tmps_floor == -1);
		732
		733	/* free all temporaries */
		734	FREETMPS;
		735	assert (PL_tmps_ix == -1);
		736
		737	/* unwind all extra stacks */
		738	POPSTACK_TO (PL_mainstack);
		739
		740	/* unwind main stack */
		741	dounwind (-1);
		742	}
		743
		744	SvREFCNT_dec (GvSV (PL_defgv));
		745	SvREFCNT_dec (GvAV (PL_defgv));
		746	SvREFCNT_dec (GvSV (PL_errgv));
		747	SvREFCNT_dec (PL_defoutgv);
		748	SvREFCNT_dec (PL_rs);
		749	SvREFCNT_dec (GvSV (irsgv));
		750
		751	SvREFCNT_dec (PL_diehook);
		752	SvREFCNT_dec (PL_warnhook);
		753
		754	SvREFCNT_dec (coro->saved_deffh);
		755	SvREFCNT_dec (coro->throw);
		756
		757	coro_destroy_stacks (aTHX);
		758	}
		759
		760	static void
		761	free_coro_mortal (pTHX)
		762	{
		763	if (expect_true (coro_mortal))
		764	{
		765	SvREFCNT_dec (coro_mortal);
		766	coro_mortal = 0;
		767	}
		768	}
		769
		770	static int
		771	runops_trace (pTHX)
		772	{
		773	COP *oldcop = 0;
		774	int oldcxix = -2;
		775	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		776	coro_cctx *cctx = coro->cctx;
		777
		778	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		779	{
		780	PERL_ASYNC_CHECK ();
		781
		782	if (cctx->flags & CC_TRACE_ALL)
		783	{
		784	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		785	{
		786	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		787	SV **bot, **top;
		788	AV *av = newAV (); /* return values */
		789	SV **cb;
		790	dSP;
		791
		792	GV *gv = CvGV (cx->blk_sub.cv);
		793	SV *fullname = sv_2mortal (newSV (0));
		794	if (isGV (gv))
		795	gv_efullname3 (fullname, gv, 0);
		796
		797	bot = PL_stack_base + cx->blk_oldsp + 1;
		798	top = cx->blk_gimme == G_ARRAY ? SP + 1
		799	: cx->blk_gimme == G_SCALAR ? bot + 1
		800	: bot;
		801
		802	av_extend (av, top - bot);
		803	while (bot < top)
		804	av_push (av, SvREFCNT_inc (*bot++));
		805
		806	PL_runops = RUNOPS_DEFAULT;
		807	ENTER;
		808	SAVETMPS;
		809	EXTEND (SP, 3);
		810	PUSHMARK (SP);
		811	PUSHs (&PL_sv_no);
		812	PUSHs (fullname);
		813	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		814	PUTBACK;
		815	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		816	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		817	SPAGAIN;
		818	FREETMPS;
		819	LEAVE;
		820	PL_runops = runops_trace;
		821	}
		822
		823	if (oldcop != PL_curcop)
		824	{
		825	oldcop = PL_curcop;
		826
		827	if (PL_curcop != &PL_compiling)
		828	{
		829	SV **cb;
		830
		831	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		832	{
		833	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		834
		835	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		836	{
		837	runops_proc_t old_runops = PL_runops;
		838	dSP;
		839	GV *gv = CvGV (cx->blk_sub.cv);
		840	SV *fullname = sv_2mortal (newSV (0));
		841
		842	if (isGV (gv))
		843	gv_efullname3 (fullname, gv, 0);
		844
		845	PL_runops = RUNOPS_DEFAULT;
		846	ENTER;
		847	SAVETMPS;
		848	EXTEND (SP, 3);
		849	PUSHMARK (SP);
		850	PUSHs (&PL_sv_yes);
		851	PUSHs (fullname);
		852	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		853	PUTBACK;
		854	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		855	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		856	SPAGAIN;
		857	FREETMPS;
		858	LEAVE;
		859	PL_runops = runops_trace;
		860	}
		861
		862	oldcxix = cxstack_ix;
		863	}
		864
		865	if (cctx->flags & CC_TRACE_LINE)
		866	{
		867	dSP;
		868
		869	PL_runops = RUNOPS_DEFAULT;
		870	ENTER;
		871	SAVETMPS;
		872	EXTEND (SP, 3);
		873	PL_runops = RUNOPS_DEFAULT;
		874	PUSHMARK (SP);
		875	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		876	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		877	PUTBACK;
		878	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		879	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		880	SPAGAIN;
		881	FREETMPS;
		882	LEAVE;
		883	PL_runops = runops_trace;
		884	}
		885	}
		886	}
		887	}
		888	}
		889
		890	TAINT_NOT;
		891	return 0;
		892	}
		893
		894	/* inject a fake call to Coro::State::_cctx_init into the execution */
		895	/* _cctx_init should be careful, as it could be called at almost any time */
		896	/* during execution of a perl program */
		897	static void NOINLINE
		898	cctx_prepare (pTHX_ coro_cctx *cctx)
		899	{
541	dSP;	900	dSP;
542	UNOP myop;	901	LOGOP myop;
543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544		902
545	coro_init_stacks (aTHX);	903	PL_top_env = &PL_start_env;
546	/*PL_curcop = 0;*/
547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
548	SvREFCNT_dec (GvAV (PL_defgv));
549	GvAV (PL_defgv) = coro->args; coro->args = 0;
550		904
551	SPAGAIN;	905	if (cctx->flags & CC_TRACE)
		906	PL_runops = runops_trace;
552		907
553	Zero (&myop, 1, UNOP);	908	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	909	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	910	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556		911
		912	PUSHMARK (SP);
		913	EXTEND (SP, 2);
		914	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		915	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		916	PUTBACK;
557	PL_op = (OP *)&myop;	917	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	918	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	919	SPAGAIN;
564
565	ENTER; /* necessary e.g. for dounwind */
566	}	920	}
567		921
		922	/*
		923	* this is a _very_ stripped down perl interpreter ;)
		924	*/
568	static void	925	static void
569	free_coro_mortal ()
570	{
571	if (coro_mortal)
572	{
573	dTHX;
574
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578	}
579
580	static void
581	coro_run (void *arg)	926	cctx_run (void *arg)
582	{	927	{
		928	dTHX;
		929
		930	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		931	UNLOCK;
		932
		933	/* we now skip the entersub that lead to transfer() */
		934	PL_op = PL_op->op_next;
		935
		936	/* inject a fake subroutine call to cctx_init */
		937	cctx_prepare (aTHX_ (coro_cctx *)arg);
		938
		939	/* somebody or something will hit me for both perl_run and PL_restartop */
		940	PL_restartop = PL_op;
		941	perl_run (PL_curinterp);
		942
583	/*	943	/*
584	* this is a _very_ stripped down perl interpreter ;)	944	* If perl-run returns we assume exit() was being called or the coro
		945	* fell off the end, which seems to be the only valid (non-bug)
		946	* reason for perl_run to return. We try to exit by jumping to the
		947	* bootstrap-time "top" top_env, as we cannot restore the "main"
		948	* coroutine as Coro has no such concept
585	*/	949	*/
586	dTHX;
587	int ret;
588
589	UNLOCK;
590
591	PL_top_env = &PL_start_env;	950	PL_top_env = main_top_env;
592		951	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595
596	/* continue at cctx_init, without entersub */
597	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
598
599	/* somebody will hit me for both perl_run and PL_restartop */
600	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
601	printf ("ret %d\n", ret);//D
602
603	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
604	abort ();
605	}	952	}
606		953
607	static coro_stack *	954	static coro_cctx *
608	stack_new ()	955	cctx_new ()
609	{	956	{
610	coro_stack *stack;	957	coro_cctx *cctx;
		958	void *stack_start;
		959	size_t stack_size;
611		960
		961	++cctx_count;
		962
612	New (0, stack, 1, coro_stack);	963	Newz (0, cctx, 1, coro_cctx);
613		964
614	#if HAVE_MMAP	965	#if HAVE_MMAP
615
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	966	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
617	/* mmap suppsedly does allocate-on-write for us */	967	/* mmap supposedly does allocate-on-write for us */
618	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	968	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
619		969
620	if (stack->sptr == (void *)-1)	970	if (cctx->sptr != (void *)-1)
621	{
622	perror ("FATAL: unable to mmap stack for coroutine");
623	_exit (EXIT_FAILURE);
624	}	971	{
625
626	# if STACKGUARD	972	# if CORO_STACKGUARD
627	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	973	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
628	# endif	974	# endif
		975	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		976	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		977	cctx->flags |= CC_MAPPED;
		978	}
		979	else
		980	#endif
		981	{
		982	cctx->ssize = coro_stacksize * (long)sizeof (long);
		983	New (0, cctx->sptr, coro_stacksize, long);
629		984
		985	if (!cctx->sptr)
		986	{
		987	perror ("FATAL: unable to allocate stack for coroutine");
		988	_exit (EXIT_FAILURE);
		989	}
		990
		991	stack_start = cctx->sptr;
		992	stack_size = cctx->ssize;
		993	}
		994
		995	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		996	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		997
		998	return cctx;
		999	}
		1000
		1001	static void
		1002	cctx_destroy (coro_cctx *cctx)
		1003	{
		1004	if (!cctx)
		1005	return;
		1006
		1007	--cctx_count;
		1008
		1009	#if CORO_USE_VALGRIND
		1010	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1011	#endif
		1012
		1013	#if HAVE_MMAP
		1014	if (cctx->flags & CC_MAPPED)
		1015	munmap (cctx->sptr, cctx->ssize);
		1016	else
		1017	#endif
		1018	Safefree (cctx->sptr);
		1019
		1020	Safefree (cctx);
		1021	}
		1022
		1023	/* wether this cctx should be destructed */
		1024	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1025
		1026	static coro_cctx *
		1027	cctx_get (pTHX)
		1028	{
		1029	while (expect_true (cctx_first))
		1030	{
		1031	coro_cctx *cctx = cctx_first;
		1032	cctx_first = cctx->next;
		1033	--cctx_idle;
		1034
		1035	if (expect_true (!CCTX_EXPIRED (cctx)))
		1036	return cctx;
		1037
		1038	cctx_destroy (cctx);
		1039	}
		1040
		1041	return cctx_new ();
		1042	}
		1043
		1044	static void
		1045	cctx_put (coro_cctx *cctx)
		1046	{
		1047	/* free another cctx if overlimit */
		1048	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1049	{
		1050	coro_cctx *first = cctx_first;
		1051	cctx_first = first->next;
		1052	--cctx_idle;
		1053
		1054	cctx_destroy (first);
		1055	}
		1056
		1057	++cctx_idle;
		1058	cctx->next = cctx_first;
		1059	cctx_first = cctx;
		1060	}
		1061
		1062	/** coroutine switching *****************************************************/
		1063
		1064	static void
		1065	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1066	{
		1067	if (expect_true (prev != next))
		1068	{
		1069	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1070	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1071
		1072	if (expect_false (next->flags & CF_RUNNING))
		1073	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1074
		1075	if (expect_false (next->flags & CF_DESTROYED))
		1076	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1077
		1078	if (
		1079	#if PERL_VERSION_ATLEAST (5,9,0)
		1080	expect_false (PL_parser)
630	#else	1081	#else
631		1082	expect_false (PL_lex_state != LEX_NOTPARSING)
632	stack->ssize = STACKSIZE * (long)sizeof (long);
633	New (0, stack->sptr, STACKSIZE, long);
634
635	if (!stack->sptr)
636	{
637	perror (stderr, "FATAL: unable to malloc stack for coroutine");
638	_exit (EXIT_FAILURE);
639	}
640
641	#endif	1083	#endif
642		1084	)
643	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	1085	croak ("Coro::State::transfer called while parsing, but this is not supported");
644
645	return stack;
646	}
647
648	static void
649	stack_free (coro_stack *stack)
650	{
651	if (!stack)
652	return;
653
654	#if HAVE_MMAP
655	munmap (stack->sptr, stack->ssize);
656	#else
657	Safefree (stack->sptr);
658	#endif
659
660	Safefree (stack);
661	}
662
663	static coro_stack *stack_first;
664
665	static coro_stack *
666	stack_get ()
667	{
668	coro_stack *stack;
669
670	if (stack_first)
671	{
672	stack = stack_first;
673	stack_first = stack->next;
674	}
675	else
676	{
677	stack = stack_new ();
678	PL_op = PL_op->op_next;
679	}	1086	}
680
681	return stack;
682	}	1087	}
683		1088
684	static void	1089	/* always use the TRANSFER macro */
685	stack_put (coro_stack *stack)	1090	static void NOINLINE
686	{
687	stack->next = stack_first;
688	stack_first = stack;
689	}
690
691	/* never call directly, always through the coro_state_transfer global variable */
692	static void
693	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1091	transfer (pTHX_ struct coro *prev, struct coro *next)
694	{	1092	{
695	dSTACKLEVEL;	1093	dSTACKLEVEL;
696		1094
697	/* sometimes transfer is only called to set idle_sp */	1095	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	1096	if (expect_false (!next))
		1097	{
699	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1098	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
700	else if (prev != next)	1099	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
701	{	1100	}
		1101	else if (expect_true (prev != next))
		1102	{
702	coro_stack *prev__stack;	1103	coro_cctx *prev__cctx;
		1104
		1105	if (expect_false (prev->flags & CF_NEW))
		1106	{
		1107	/* create a new empty context */
		1108	Newz (0, prev->cctx, 1, coro_cctx);
		1109	prev->flags &= ~CF_NEW;
		1110	prev->flags |= CF_RUNNING;
		1111	}
		1112
		1113	prev->flags &= ~CF_RUNNING;
		1114	next->flags |= CF_RUNNING;
703		1115
704	LOCK;	1116	LOCK;
705		1117
706	if (next->mainstack)	1118	if (expect_false (next->flags & CF_NEW))
707	{	1119	{
708	/* coroutine already started */	1120	/* need to start coroutine */
709	SAVE (prev, flags);	1121	next->flags &= ~CF_NEW;
710	LOAD (next);	1122	/* first get rid of the old state */
		1123	save_perl (aTHX_ prev);
		1124	/* setup coroutine call */
		1125	coro_setup (aTHX_ next);
711	}	1126	}
712	else	1127	else
713	{	1128	{
714	/* need to start coroutine */	1129	/* coroutine already started */
715	/* first get rid of the old state */	1130	save_perl (aTHX_ prev);
716	SAVE (prev, -1);	1131	load_perl (aTHX_ next);
717	/* setup coroutine call */
718	setup_coro (next);
719	/* need a stack */
720	next->stack = 0;
721	}	1132	}
722		1133
723	if (!prev->stack)
724	/* create a new empty context */
725	Newz (0, prev->stack, 1, coro_stack);
726
727	prev__stack = prev->stack;	1134	prev__cctx = prev->cctx;
728		1135
729	/* possibly "free" the stack */	1136	/* possibly "free" the cctx */
730	if (prev__stack->idle_sp == STACKLEVEL)	1137	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
731	{	1138	{
732	stack_put (prev__stack);	1139	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1140	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1141
733	prev->stack = 0;	1142	prev->cctx = 0;
		1143
		1144	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1145	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1146	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1147	if (!next->cctx)
		1148	next->cctx = cctx_get (aTHX);
		1149
		1150	cctx_put (prev__cctx);
734	}	1151	}
735		1152
736	if (!next->stack)	1153	++next->usecount;
737	next->stack = stack_get ();
738		1154
739	if (prev__stack != next->stack)	1155	if (expect_true (!next->cctx))
		1156	next->cctx = cctx_get (aTHX);
		1157
		1158	if (expect_false (prev__cctx != next->cctx))
740	{	1159	{
741	prev__stack->top_env = PL_top_env;	1160	prev__cctx->top_env = PL_top_env;
742	PL_top_env = next->stack->top_env;	1161	PL_top_env = next->cctx->top_env;
743	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1162	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
744	}	1163	}
745		1164
746	free_coro_mortal ();	1165	free_coro_mortal (aTHX);
747
748	UNLOCK;	1166	UNLOCK;
749	}
750	}
751		1167
752	/* use this function pointer to call the above function */	1168	if (expect_false (prev->throw || next->throw))
753	/* this is done to increase chances of the compiler not inlining the call */	1169	{
754	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */	1170	struct coro *coro = SvSTATE (coro_current);
755	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1171
		1172	if (coro->throw)
		1173	{
		1174	SV *exception = coro->throw;
		1175	coro->throw = 0;
		1176	sv_setsv (ERRSV, exception);
		1177	croak (0);
		1178	}
		1179	}
		1180	}
		1181	}
756		1182
757	struct transfer_args	1183	struct transfer_args
758	{	1184	{
759	struct coro *prev, *next;	1185	struct coro *prev, *next;
760	int flags;
761	};	1186	};
762		1187
763	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1188	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1189	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
764		1190
		1191	/** high level stuff ********************************************************/
		1192
765	static void	1193	static int
766	coro_state_destroy (struct coro *coro)	1194	coro_state_destroy (pTHX_ struct coro *coro)
767	{	1195	{
768	if (coro->refcnt--)	1196	if (coro->flags & CF_DESTROYED)
769	return;	1197	return 0;
		1198
		1199	coro->flags |= CF_DESTROYED;
		1200
		1201	if (coro->flags & CF_READY)
		1202	{
		1203	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1204	/* alternative: look through all ready queues and remove the coro */
		1205	LOCK;
		1206	--coro_nready;
		1207	UNLOCK;
		1208	}
		1209	else
		1210	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
770		1211
771	if (coro->mainstack && coro->mainstack != main_mainstack)	1212	if (coro->mainstack && coro->mainstack != main_mainstack)
772	{	1213	{
773	struct coro temp;	1214	struct coro temp;
774		1215
775	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1216	if (coro->flags & CF_RUNNING)
		1217	croak ("FATAL: tried to destroy currently running coroutine");
		1218
		1219	save_perl (aTHX_ &temp);
776	LOAD (aTHX_ coro);	1220	load_perl (aTHX_ coro);
777		1221
778	destroy_stacks (aTHX);	1222	coro_destroy (aTHX_ coro);
779		1223
780	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1224	load_perl (aTHX_ &temp);
781		1225
782	coro->mainstack = 0;	1226	coro->slot = 0;
783	}	1227	}
784		1228
785	stack_free (coro->stack);	1229	cctx_destroy (coro->cctx);
786	SvREFCNT_dec (coro->args);	1230	SvREFCNT_dec (coro->args);
787	Safefree (coro);	1231
		1232	if (coro->next) coro->next->prev = coro->prev;
		1233	if (coro->prev) coro->prev->next = coro->next;
		1234	if (coro == coro_first) coro_first = coro->next;
		1235
		1236	return 1;
788	}	1237	}
789		1238
790	static int	1239	static int
791	coro_state_clear (SV *sv, MAGIC *mg)	1240	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
792	{	1241	{
793	struct coro *coro = (struct coro *)mg->mg_ptr;	1242	struct coro *coro = (struct coro *)mg->mg_ptr;
794	mg->mg_ptr = 0;	1243	mg->mg_ptr = 0;
795		1244
		1245	coro->hv = 0;
		1246
		1247	if (--coro->refcnt < 0)
		1248	{
796	coro_state_destroy (coro);	1249	coro_state_destroy (aTHX_ coro);
		1250	Safefree (coro);
		1251	}
797		1252
798	return 0;	1253	return 0;
799	}	1254	}
800		1255
801	static int	1256	static int
802	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1257	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
803	{	1258	{
804	struct coro *coro = (struct coro *)mg->mg_ptr;	1259	struct coro *coro = (struct coro *)mg->mg_ptr;
805		1260
806	++coro->refcnt;	1261	++coro->refcnt;
807		1262
808	return 0;	1263	return 0;
809	}	1264	}
810		1265
811	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1266	static MGVTBL coro_state_vtbl = {
		1267	0, 0, 0, 0,
		1268	coro_state_free,
		1269	0,
		1270	#ifdef MGf_DUP
		1271	coro_state_dup,
		1272	#else
		1273	# define MGf_DUP 0
		1274	#endif
		1275	};
812		1276
813	static struct coro *
814	SvSTATE (SV *coro)
815	{
816	HV *stash;
817	MAGIC *mg;
818
819	if (SvROK (coro))
820	coro = SvRV (coro);
821
822	stash = SvSTASH (coro);
823	if (stash != coro_stash && stash != coro_state_stash)
824	{
825	/* very slow, but rare, check */
826	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
827	croak ("Coro::State object required");
828	}
829
830	mg = SvMAGIC (coro);
831	assert (mg->mg_type == PERL_MAGIC_ext);
832	return (struct coro *)mg->mg_ptr;
833	}
834
835	static void	1277	static void
836	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1278	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
837	{	1279	{
838	ta->prev = SvSTATE (prev);	1280	ta->prev = SvSTATE (prev_sv);
839	ta->next = SvSTATE (next);	1281	ta->next = SvSTATE (next_sv);
840	ta->flags = flags;	1282	TRANSFER_CHECK (*ta);
841	}	1283	}
842		1284
843	static void	1285	static void
844	api_transfer (SV *prev, SV *next, int flags)	1286	api_transfer (SV *prev_sv, SV *next_sv)
845	{	1287	{
846	dTHX;	1288	dTHX;
847	struct transfer_args ta;	1289	struct transfer_args ta;
848		1290
849	prepare_transfer (aTHX_ &ta, prev, next, flags);	1291	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
850	TRANSFER (ta);	1292	TRANSFER (ta);
851	}	1293	}
852		1294
853	/** Coro ********************************************************************/	1295	/** Coro ********************************************************************/
854		1296
855	#define PRIO_MAX 3
856	#define PRIO_HIGH 1
857	#define PRIO_NORMAL 0
858	#define PRIO_LOW -1
859	#define PRIO_IDLE -3
860	#define PRIO_MIN -4
861
862	/* for Coro.pm */
863	static GV *coro_current, *coro_idle;
864	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
865	static int coro_nready;
866
867	static void	1297	static void
868	coro_enq (pTHX_ SV *sv)	1298	coro_enq (pTHX_ SV *coro_sv)
869	{	1299	{
870	int prio;
871
872	if (SvTYPE (sv) != SVt_PVHV)
873	croak ("Coro::ready tried to enqueue something that is not a coroutine");
874
875	prio = SvSTATE (sv)->prio;
876
877	av_push (coro_ready [prio - PRIO_MIN], sv);	1300	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
878	coro_nready++;
879	}	1301	}
880		1302
881	static SV *	1303	static SV *
882	coro_deq (pTHX_ int min_prio)	1304	coro_deq (pTHX_ int min_prio)
883	{	1305	{
…		…
887	if (min_prio < 0)	1309	if (min_prio < 0)
888	min_prio = 0;	1310	min_prio = 0;
889		1311
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1312	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (AvFILLp (coro_ready [prio]) >= 0)	1313	if (AvFILLp (coro_ready [prio]) >= 0)
892	{
893	coro_nready--;
894	return av_shift (coro_ready [prio]);	1314	return av_shift (coro_ready [prio]);
895	}
896		1315
897	return 0;	1316	return 0;
898	}	1317	}
899		1318
900	static void	1319	static int
901	api_ready (SV *coro)	1320	api_ready (SV *coro_sv)
902	{	1321	{
903	dTHX;	1322	dTHX;
		1323	struct coro *coro;
904		1324
905	if (SvROK (coro))	1325	if (SvROK (coro_sv))
906	coro = SvRV (coro);	1326	coro_sv = SvRV (coro_sv);
		1327
		1328	coro = SvSTATE (coro_sv);
		1329
		1330	if (coro->flags & CF_READY)
		1331	return 0;
		1332
		1333	coro->flags |= CF_READY;
907		1334
908	LOCK;	1335	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	1336	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1337	++coro_nready;
910	UNLOCK;	1338	UNLOCK;
911	}
912		1339
		1340	return 1;
		1341	}
		1342
913	static void	1343	static int
		1344	api_is_ready (SV *coro_sv)
		1345	{
		1346	dTHX;
		1347	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1348	}
		1349
		1350	static void
914	prepare_schedule (aTHX_ struct transfer_args *ta)	1351	prepare_schedule (pTHX_ struct transfer_args *ta)
915	{	1352	{
916	SV *current, *prev, *next;	1353	SV *prev_sv, *next_sv;
		1354
		1355	for (;;)
		1356	{
		1357	LOCK;
		1358	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1359
		1360	/* nothing to schedule: call the idle handler */
		1361	if (expect_false (!next_sv))
		1362	{
		1363	dSP;
		1364	UNLOCK;
		1365
		1366	ENTER;
		1367	SAVETMPS;
		1368
		1369	PUSHMARK (SP);
		1370	PUTBACK;
		1371	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1372
		1373	FREETMPS;
		1374	LEAVE;
		1375	continue;
		1376	}
		1377
		1378	ta->next = SvSTATE (next_sv);
		1379
		1380	/* cannot transfer to destroyed coros, skip and look for next */
		1381	if (expect_false (ta->next->flags & CF_DESTROYED))
		1382	{
		1383	UNLOCK;
		1384	SvREFCNT_dec (next_sv);
		1385	/* coro_nready is already taken care of by destroy */
		1386	continue;
		1387	}
		1388
		1389	--coro_nready;
		1390	UNLOCK;
		1391	break;
		1392	}
		1393
		1394	/* free this only after the transfer */
		1395	prev_sv = SvRV (coro_current);
		1396	ta->prev = SvSTATE (prev_sv);
		1397	TRANSFER_CHECK (*ta);
		1398	assert (ta->next->flags & CF_READY);
		1399	ta->next->flags &= ~CF_READY;
		1400	SvRV_set (coro_current, next_sv);
917		1401
918	LOCK;	1402	LOCK;
919
920	current = GvSV (coro_current);
921
922	for (;;)
923	{
924	LOCK;
925
926	next = coro_deq (aTHX_ PRIO_MIN);
927
928	if (next)
929	break;
930
931	UNLOCK;
932
933	{
934	dSP;
935
936	ENTER;
937	SAVETMPS;
938
939	PUSHMARK (SP);
940	PUTBACK;
941	call_sv (GvSV (coro_idle), G_DISCARD);
942
943	FREETMPS;
944	LEAVE;
945	}
946	}
947
948	prev = SvRV (current);
949	SvRV (current) = next;
950
951	/* free this only after the transfer */
952	free_coro_mortal ();	1403	free_coro_mortal (aTHX);
953	coro_mortal = prev;	1404	coro_mortal = prev_sv;
954
955	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;
958
959	UNLOCK;	1405	UNLOCK;
960	}	1406	}
961		1407
962	static void	1408	static void
963	prepare_cede (aTHX_ struct transfer_args *ta)	1409	prepare_cede (pTHX_ struct transfer_args *ta)
964	{	1410	{
965	LOCK;	1411	api_ready (coro_current);
966	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
967	UNLOCK;
968
969	prepare_schedule (ta);	1412	prepare_schedule (aTHX_ ta);
		1413	}
		1414
		1415	static int
		1416	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1417	{
		1418	if (coro_nready)
		1419	{
		1420	SV *prev = SvRV (coro_current);
		1421	prepare_schedule (aTHX_ ta);
		1422	api_ready (prev);
		1423	return 1;
		1424	}
		1425	else
		1426	return 0;
970	}	1427	}
971		1428
972	static void	1429	static void
973	api_schedule (void)	1430	api_schedule (void)
974	{	1431	{
975	dTHX;	1432	dTHX;
976	struct transfer_args ta;	1433	struct transfer_args ta;
977		1434
978	prepare_schedule (&ta);	1435	prepare_schedule (aTHX_ &ta);
979	TRANSFER (ta);	1436	TRANSFER (ta);
980	}	1437	}
981		1438
982	static void	1439	static int
983	api_cede (void)	1440	api_cede (void)
984	{	1441	{
985	dTHX;	1442	dTHX;
986	struct transfer_args ta;	1443	struct transfer_args ta;
987		1444
988	prepare_cede (&ta);	1445	prepare_cede (aTHX_ &ta);
		1446
		1447	if (expect_true (ta.prev != ta.next))
		1448	{
989	TRANSFER (ta);	1449	TRANSFER (ta);
		1450	return 1;
		1451	}
		1452	else
		1453	return 0;
990	}	1454	}
991		1455
		1456	static int
		1457	api_cede_notself (void)
		1458	{
		1459	dTHX;
		1460	struct transfer_args ta;
		1461
		1462	if (prepare_cede_notself (aTHX_ &ta))
		1463	{
		1464	TRANSFER (ta);
		1465	return 1;
		1466	}
		1467	else
		1468	return 0;
		1469	}
		1470
		1471	static void
		1472	api_trace (SV *coro_sv, int flags)
		1473	{
		1474	dTHX;
		1475	struct coro *coro = SvSTATE (coro_sv);
		1476
		1477	if (flags & CC_TRACE)
		1478	{
		1479	if (!coro->cctx)
		1480	coro->cctx = cctx_new ();
		1481	else if (!(coro->cctx->flags & CC_TRACE))
		1482	croak ("cannot enable tracing on coroutine with custom stack");
		1483
		1484	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1485	}
		1486	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1487	{
		1488	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1489
		1490	if (coro->flags & CF_RUNNING)
		1491	PL_runops = RUNOPS_DEFAULT;
		1492	else
		1493	coro->slot->runops = RUNOPS_DEFAULT;
		1494	}
		1495	}
		1496
992	MODULE = Coro::State PACKAGE = Coro::State	1497	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
993		1498
994	PROTOTYPES: DISABLE	1499	PROTOTYPES: DISABLE
995		1500
996	BOOT:	1501	BOOT:
997	{	1502	{
998	#ifdef USE_ITHREADS	1503	#ifdef USE_ITHREADS
999	MUTEX_INIT (&coro_mutex);	1504	MUTEX_INIT (&coro_mutex);
1000	#endif	1505	#endif
1001	BOOT_PAGESIZE;	1506	BOOT_PAGESIZE;
1002		1507
		1508	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1509	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1510
		1511	hv_sig = coro_get_hv ("SIG", TRUE);
		1512	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1513	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1514
		1515	if (!PL_diehook ) hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);
		1516	if (!PL_warnhook) hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);
		1517
1003	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1518	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1004		1519
1005	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1006	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1521	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1007	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1522	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1523	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1008		1524
1009	main_mainstack = PL_mainstack;	1525	main_mainstack = PL_mainstack;
		1526	main_top_env = PL_top_env;
		1527
		1528	while (main_top_env->je_prev)
		1529	main_top_env = main_top_env->je_prev;
1010		1530
1011	coroapi.ver = CORO_API_VERSION;	1531	coroapi.ver = CORO_API_VERSION;
		1532	coroapi.rev = CORO_API_REVISION;
1012	coroapi.transfer = api_transfer;	1533	coroapi.transfer = api_transfer;
1013		1534
1014	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1535	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1015	}	1536	}
1016		1537
…		…
1021	struct coro *coro;	1542	struct coro *coro;
1022	HV *hv;	1543	HV *hv;
1023	int i;	1544	int i;
1024		1545
1025	Newz (0, coro, 1, struct coro);	1546	Newz (0, coro, 1, struct coro);
1026	coro->args = newAV ();	1547	coro->args = newAV ();
		1548	coro->flags = CF_NEW;
1027		1549
		1550	if (coro_first) coro_first->prev = coro;
		1551	coro->next = coro_first;
		1552	coro_first = coro;
		1553
1028	hv = newHV ();	1554	coro->hv = hv = newHV ();
1029	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1555	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1030	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1556	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1031		1557
		1558	av_extend (coro->args, items - 1);
1032	for (i = 1; i < items; i++)	1559	for (i = 1; i < items; i++)
1033	av_push (coro->args, newSVsv (ST (i)));	1560	av_push (coro->args, newSVsv (ST (i)));
1034
1035	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1036	/*coro->stack = 0;*/
1037	}	1561	}
1038	OUTPUT:	1562	OUTPUT:
1039	RETVAL	1563	RETVAL
1040		1564
		1565	# these not obviously related functions are all rolled into the same xs
		1566	# function to increase chances that they all will call transfer with the same
		1567	# stack offset
1041	void	1568	void
1042	_set_stacklevel (...)	1569	_set_stacklevel (...)
1043	ALIAS:	1570	ALIAS:
1044	Coro::State::transfer = 1	1571	Coro::State::transfer = 1
1045	Coro::schedule = 2	1572	Coro::schedule = 2
1046	Coro::cede = 3	1573	Coro::cede = 3
1047	Coro::Cont::yield = 4	1574	Coro::cede_notself = 4
1048	CODE:	1575	CODE:
1049	{	1576	{
1050	struct transfer_args ta;	1577	struct transfer_args ta;
1051		1578
1052	switch (ix)	1579	switch (ix)
1053	{	1580	{
1054	case 0:	1581	case 0:
1055	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1582	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1056	ta.next = 0;	1583	ta.next = 0;
1057	ta.flags = TRANSFER_SET_STACKLEVEL;
1058	break;	1584	break;
1059		1585
1060	case 1:	1586	case 1:
1061	if (items != 3)	1587	if (items != 2)
1062	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1588	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1063		1589
1064	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1590	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1065	break;	1591	break;
1066		1592
1067	case 2:	1593	case 2:
1068	prepare_schedule (&ta);	1594	prepare_schedule (aTHX_ &ta);
1069	break;	1595	break;
1070		1596
1071	case 3:	1597	case 3:
1072	prepare_cede (&ta);	1598	prepare_cede (aTHX_ &ta);
1073	break;	1599	break;
1074		1600
1075	case 4:	1601	case 4:
1076	{	1602	if (!prepare_cede_notself (aTHX_ &ta))
1077	SV *yieldstack;	1603	XSRETURN_EMPTY;
1078	SV *sv;
1079	AV *defav = GvAV (PL_defgv);
1080		1604
1081	yieldstack = *hv_fetch (
1082	(HV *)SvRV (GvSV (coro_current)),
1083	"yieldstack", sizeof ("yieldstack") - 1,
1084	0
1085	);
1086
1087	/* set up @_ -- ugly */
1088	av_clear (defav);
1089	av_fill (defav, items - 1);
1090	while (items--)
1091	av_store (defav, items, SvREFCNT_inc (ST(items)));
1092
1093	sv = av_pop ((AV *)SvRV (yieldstack));
1094	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1095	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1096	ta.flags = 0;
1097	SvREFCNT_dec (sv);
1098	}
1099	break;	1605	break;
1100
1101	}	1606	}
1102		1607
		1608	BARRIER;
		1609	PUTBACK;
1103	TRANSFER (ta);	1610	TRANSFER (ta);
		1611	SPAGAIN; /* might be the sp of a different coroutine now */
		1612	/* be extra careful not to ever do anything after TRANSFER */
1104	}	1613	}
1105		1614
1106	void	1615	bool
1107	_clone_state_from (SV *dst, SV *src)	1616	_destroy (SV *coro_sv)
1108	CODE:	1617	CODE:
1109	{	1618	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1110	struct coro *coro_src = SvSTATE (src);	1619	OUTPUT:
1111		1620	RETVAL
1112	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1113
1114	++coro_src->refcnt;
1115	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1116	}
1117
1118	void
1119	_nonlocal_goto (IV nextop)
1120	CODE:
1121	/* uuh, somebody will kill me again for this */
1122	PL_op->op_next = INT2PTR (OP *, nextop);
1123		1621
1124	void	1622	void
1125	_exit (code)	1623	_exit (code)
1126	int code	1624	int code
1127	PROTOTYPE: $	1625	PROTOTYPE: $
1128	CODE:	1626	CODE:
1129	_exit (code);	1627	_exit (code);
1130		1628
		1629	int
		1630	cctx_stacksize (int new_stacksize = 0)
		1631	CODE:
		1632	RETVAL = coro_stacksize;
		1633	if (new_stacksize)
		1634	coro_stacksize = new_stacksize;
		1635	OUTPUT:
		1636	RETVAL
		1637
		1638	int
		1639	cctx_count ()
		1640	CODE:
		1641	RETVAL = cctx_count;
		1642	OUTPUT:
		1643	RETVAL
		1644
		1645	int
		1646	cctx_idle ()
		1647	CODE:
		1648	RETVAL = cctx_idle;
		1649	OUTPUT:
		1650	RETVAL
		1651
		1652	void
		1653	list ()
		1654	PPCODE:
		1655	{
		1656	struct coro *coro;
		1657	for (coro = coro_first; coro; coro = coro->next)
		1658	if (coro->hv)
		1659	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1660	}
		1661
		1662	void
		1663	call (Coro::State coro, SV *coderef)
		1664	ALIAS:
		1665	eval = 1
		1666	CODE:
		1667	{
		1668	if (coro->mainstack)
		1669	{
		1670	struct coro temp;
		1671
		1672	if (!(coro->flags & CF_RUNNING))
		1673	{
		1674	save_perl (aTHX_ &temp);
		1675	load_perl (aTHX_ coro);
		1676	}
		1677
		1678	{
		1679	dSP;
		1680	ENTER;
		1681	SAVETMPS;
		1682	PUTBACK;
		1683	PUSHSTACK;
		1684	PUSHMARK (SP);
		1685
		1686	if (ix)
		1687	eval_sv (coderef, 0);
		1688	else
		1689	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1690
		1691	POPSTACK;
		1692	SPAGAIN;
		1693	FREETMPS;
		1694	LEAVE;
		1695	PUTBACK;
		1696	}
		1697
		1698	if (!(coro->flags & CF_RUNNING))
		1699	{
		1700	save_perl (aTHX_ coro);
		1701	load_perl (aTHX_ &temp);
		1702	}
		1703	}
		1704	}
		1705
		1706	SV *
		1707	is_ready (Coro::State coro)
		1708	PROTOTYPE: $
		1709	ALIAS:
		1710	is_ready = CF_READY
		1711	is_running = CF_RUNNING
		1712	is_new = CF_NEW
		1713	is_destroyed = CF_DESTROYED
		1714	CODE:
		1715	RETVAL = boolSV (coro->flags & ix);
		1716	OUTPUT:
		1717	RETVAL
		1718
		1719	void
		1720	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1721
		1722	SV *
		1723	has_stack (Coro::State coro)
		1724	PROTOTYPE: $
		1725	CODE:
		1726	RETVAL = boolSV (!!coro->cctx);
		1727	OUTPUT:
		1728	RETVAL
		1729
		1730	int
		1731	is_traced (Coro::State coro)
		1732	PROTOTYPE: $
		1733	CODE:
		1734	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1735	OUTPUT:
		1736	RETVAL
		1737
		1738	IV
		1739	rss (Coro::State coro)
		1740	PROTOTYPE: $
		1741	ALIAS:
		1742	usecount = 1
		1743	CODE:
		1744	switch (ix)
		1745	{
		1746	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1747	case 1: RETVAL = coro->usecount; break;
		1748	}
		1749	OUTPUT:
		1750	RETVAL
		1751
		1752
1131	MODULE = Coro::State PACKAGE = Coro	1753	MODULE = Coro::State PACKAGE = Coro
1132		1754
1133	BOOT:	1755	BOOT:
1134	{	1756	{
1135	int i;	1757	int i;
1136		1758
		1759	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1760	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1761	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1762
		1763	coro_current = coro_get_sv ("Coro::current", FALSE);
		1764	SvREADONLY_on (coro_current);
		1765
1137	coro_stash = gv_stashpv ("Coro", TRUE);	1766	coro_stash = gv_stashpv ("Coro", TRUE);
1138		1767
1139	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1768	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1140	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1769	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1141	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1770	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1142	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1771	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1143	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1772	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1144	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1773	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1145		1774
1146	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1147	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1148
1149	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1775	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1150	coro_ready[i] = newAV ();	1776	coro_ready[i] = newAV ();
1151		1777
1152	{	1778	{
1153	SV *sv = perl_get_sv("Coro::API", 1);	1779	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1780	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1154		1781
1155	coroapi.schedule = api_schedule;	1782	coroapi.schedule = api_schedule;
1156	coroapi.cede = api_cede;	1783	coroapi.cede = api_cede;
		1784	coroapi.cede_notself = api_cede_notself;
1157	coroapi.ready = api_ready;	1785	coroapi.ready = api_ready;
		1786	coroapi.is_ready = api_is_ready;
1158	coroapi.nready = &coro_nready;	1787	coroapi.nready = &coro_nready;
1159	coroapi.current = coro_current;	1788	coroapi.current = coro_current;
1160		1789
1161	GCoroAPI = &coroapi;	1790	GCoroAPI = &coroapi;
1162	sv_setiv (sv, (IV)&coroapi);	1791	sv_setiv (sv, (IV)&coroapi);
1163	SvREADONLY_on (sv);	1792	SvREADONLY_on (sv);
1164	}	1793	}
1165	}	1794	}
		1795
		1796	void
		1797	_set_current (SV *current)
		1798	PROTOTYPE: $
		1799	CODE:
		1800	SvREFCNT_dec (SvRV (coro_current));
		1801	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1166		1802
1167	int	1803	int
1168	prio (Coro::State coro, int newprio = 0)	1804	prio (Coro::State coro, int newprio = 0)
1169	ALIAS:	1805	ALIAS:
1170	nice = 1	1806	nice = 1
…		…
1173	RETVAL = coro->prio;	1809	RETVAL = coro->prio;
1174		1810
1175	if (items > 1)	1811	if (items > 1)
1176	{	1812	{
1177	if (ix)	1813	if (ix)
1178	newprio += coro->prio;	1814	newprio = coro->prio - newprio;
1179		1815
1180	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1816	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1181	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1817	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1182		1818
1183	coro->prio = newprio;	1819	coro->prio = newprio;
1184	}	1820	}
1185	}	1821	}
		1822	OUTPUT:
		1823	RETVAL
1186		1824
1187	void	1825	SV *
1188	ready (SV *self)	1826	ready (SV *self)
1189	PROTOTYPE: $	1827	PROTOTYPE: $
1190	CODE:	1828	CODE:
1191	api_ready (self);	1829	RETVAL = boolSV (api_ready (self));
		1830	OUTPUT:
		1831	RETVAL
1192		1832
1193	int	1833	int
1194	nready (...)	1834	nready (...)
1195	PROTOTYPE:	1835	PROTOTYPE:
1196	CODE:	1836	CODE:
1197	RETVAL = coro_nready;	1837	RETVAL = coro_nready;
1198	OUTPUT:	1838	OUTPUT:
1199	RETVAL	1839	RETVAL
1200		1840
		1841	void
		1842	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1843	PROTOTYPE: $;$
		1844	CODE:
		1845	SvREFCNT_dec (self->throw);
		1846	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1847
		1848	# for async_pool speedup
		1849	void
		1850	_pool_1 (SV *cb)
		1851	CODE:
		1852	{
		1853	struct coro *coro = SvSTATE (coro_current);
		1854	HV *hv = (HV *)SvRV (coro_current);
		1855	AV *defav = GvAV (PL_defgv);
		1856	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1857	AV *invoke_av;
		1858	int i, len;
		1859
		1860	if (!invoke)
		1861	croak ("\3async_pool terminate\2\n");
		1862
		1863	SvREFCNT_dec (coro->saved_deffh);
		1864	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1865
		1866	hv_store (hv, "desc", sizeof ("desc") - 1,
		1867	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1868
		1869	invoke_av = (AV *)SvRV (invoke);
		1870	len = av_len (invoke_av);
		1871
		1872	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1873
		1874	if (len > 0)
		1875	{
		1876	av_fill (defav, len - 1);
		1877	for (i = 0; i < len; ++i)
		1878	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1879	}
		1880
		1881	SvREFCNT_dec (invoke);
		1882	}
		1883
		1884	void
		1885	_pool_2 (SV *cb)
		1886	CODE:
		1887	{
		1888	struct coro *coro = SvSTATE (coro_current);
		1889
		1890	sv_setsv (cb, &PL_sv_undef);
		1891
		1892	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1893	coro->saved_deffh = 0;
		1894
		1895	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1896	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1897	croak ("\3async_pool terminate\2\n");
		1898
		1899	av_clear (GvAV (PL_defgv));
		1900	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1901	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1902
		1903	coro->prio = 0;
		1904
		1905	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1906	api_trace (coro_current, 0);
		1907
		1908	av_push (av_async_pool, newSVsv (coro_current));
		1909	}
		1910
		1911
1201	MODULE = Coro::State PACKAGE = Coro::AIO	1912	MODULE = Coro::State PACKAGE = Coro::AIO
1202		1913
1203	SV *	1914	SV *
1204	_get_state ()	1915	_get_state ()
1205	CODE:	1916	CODE:
1206	{	1917	{
1207	struct {	1918	struct io_state *data;
1208	int errorno;
1209	int laststype;
1210	int laststatval;
1211	Stat_t statcache;
1212	} data;
1213		1919
		1920	RETVAL = newSV (sizeof (struct io_state));
		1921	data = (struct io_state *)SvPVX (RETVAL);
		1922	SvCUR_set (RETVAL, sizeof (struct io_state));
		1923	SvPOK_only (RETVAL);
		1924
1214	data.errorno = errno;	1925	data->errorno = errno;
1215	data.laststype = PL_laststype;	1926	data->laststype = PL_laststype;
1216	data.laststatval = PL_laststatval;	1927	data->laststatval = PL_laststatval;
1217	data.statcache = PL_statcache;	1928	data->statcache = PL_statcache;
1218
1219	RETVAL = newSVpvn ((char *)&data, sizeof data);
1220	}	1929	}
1221	OUTPUT:	1930	OUTPUT:
1222	RETVAL	1931	RETVAL
1223		1932
1224	void	1933	void
1225	_set_state (char *data_)	1934	_set_state (char *data_)
1226	PROTOTYPE: $	1935	PROTOTYPE: $
1227	CODE:	1936	CODE:
1228	{	1937	{
1229	struct {	1938	struct io_state *data = (void *)data_;
1230	int errorno;
1231	int laststype;
1232	int laststatval;
1233	Stat_t statcache;
1234	} *data = (void *)data_;
1235		1939
1236	errno = data->errorno;	1940	errno = data->errorno;
1237	PL_laststype = data->laststype;	1941	PL_laststype = data->laststype;
1238	PL_laststatval = data->laststatval;	1942	PL_laststatval = data->laststatval;
1239	PL_statcache = data->statcache;	1943	PL_statcache = data->statcache;
1240	}	1944	}
		1945

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