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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.211 by root, Wed Oct 10 03:37:58 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	#define strpair(const) const, sizeof (const) - 1
		137
		138	/* helper storage struct for Coro::AIO */
		139	struct io_state
		140	{
		141	int errorno;
		142	I32 laststype;
		143	int laststatval;
		144	Stat_t statcache;
		145	};
		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	148	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	149	static AV *main_mainstack; /* used to differentiate between $main and others */
		150	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	151	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	152	static SV *coro_mortal; /* will be freed after next transfer */
88		153
		154	static GV *irsgv; /* $/ */
		155	static GV *stdoutgv; /* *STDOUT */
		156
		157	static HV *hv_sig; /* %SIG */
		158	static SV *sv_diehook;
		159	static SV *sv_warnhook;
		160
		161	/* async_pool helper stuff */
		162	static SV *sv_pool_rss;
		163	static SV *sv_pool_size;
		164	static AV *av_async_pool;
		165
		166	static struct coro_cctx *cctx_first;
		167	static int cctx_count, cctx_idle;
		168
		169	enum {
		170	CC_MAPPED = 0x01,
		171	CC_NOREUSE = 0x02, /* throw this away after tracing */
		172	CC_TRACE = 0x04,
		173	CC_TRACE_SUB = 0x08, /* trace sub calls */
		174	CC_TRACE_LINE = 0x10, /* trace each statement */
		175	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		176	};
		177
89	/* this is a structure representing a c-level coroutine */	178	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	179	typedef struct coro_cctx {
91	struct coro_stack *next;	180	struct coro_cctx *next;
92		181
93	/* the stack */	182	/* the stack */
94	void *sptr;	183	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	184	size_t ssize;
96		185
97	/* cpu state */	186	/* cpu state */
98	void *idle_sp; /* original stacklevel when coroutine was created */	187	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		188	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	189	JMPENV *top_env;
100	coro_context cctx;	190	coro_context cctx;
101	} coro_stack;
102		191
103	/* the (fake) coro_stack representing the main program */	192	#if CORO_USE_VALGRIND
104	static coro_stack *main_stack;	193	int valgrind_id;
		194	#endif
		195	unsigned char flags;
		196	} coro_cctx;
		197
		198	enum {
		199	CF_RUNNING = 0x0001, /* coroutine is running */
		200	CF_READY = 0x0002, /* coroutine is ready */
		201	CF_NEW = 0x0004, /* has never been switched to */
		202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		203	};
		204
		205	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		206	typedef struct {
		207	SV *defsv;
		208	AV *defav;
		209	SV *errsv;
		210	SV *irsgv;
		211	#define VAR(name,type) type name;
		212	# include "state.h"
		213	#undef VAR
		214	} perl_slots;
		215
		216	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
105		217
106	/* this is a structure representing a perl-level coroutine */	218	/* this is a structure representing a perl-level coroutine */
107	struct coro {	219	struct coro {
108	/* the c coroutine allocated to this perl coroutine, if any */	220	/* the c coroutine allocated to this perl coroutine, if any */
109	coro_stack *stack;	221	coro_cctx *cctx;
110		222
111	/* data associated with this coroutine (initial args) */	223	/* process data */
112	AV *args;
113	int refcnt;
114
115	/* optionally saved, might be zero */
116	AV *defav;
117	SV *defsv;
118	SV *errsv;
119
120	/* saved global state not related to stacks */
121	U8 dowarn;
122	I32 in_eval;
123
124	/* the stacks and related info (callchain etc..) */
125	PERL_SI *curstackinfo;
126	AV *curstack;
127	AV *mainstack;	224	AV *mainstack;
128	SV **stack_sp;	225	perl_slots *slot; /* basically the saved sp */
129	OP *op;	226
130	SV **curpad;	227	AV *args; /* data associated with this coroutine (initial args) */
131	AV *comppad;	228	int refcnt; /* coroutines are refcounted, yes */
132	CV *compcv;	229	int flags; /* CF_ flags */
133	SV **stack_base;	230	HV *hv; /* the perl hash associated with this coro, if any */
134	SV **stack_max;	231
135	SV **tmps_stack;	232	/* statistics */
136	I32 tmps_floor;	233	int usecount; /* number of transfers to this coro */
137	I32 tmps_ix;
138	I32 tmps_max;
139	I32 *markstack;
140	I32 *markstack_ptr;
141	I32 *markstack_max;
142	I32 *scopestack;
143	I32 scopestack_ix;
144	I32 scopestack_max;
145	ANY *savestack;
146	I32 savestack_ix;
147	I32 savestack_max;
148	OP **retstack;
149	I32 retstack_ix;
150	I32 retstack_max;
151	PMOP *curpm;
152	COP *curcop;
153		234
154	/* coro process data */	235	/* coro process data */
155	int prio;	236	int prio;
		237	SV *throw; /* exception to be thrown */
		238
		239	/* async_pool */
		240	SV *saved_deffh;
		241
		242	/* linked list */
		243	struct coro *next, *prev;
156	};	244	};
157		245
158	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
159	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
160		248
		249	/** Coro ********************************************************************/
		250
		251	#define PRIO_MAX 3
		252	#define PRIO_HIGH 1
		253	#define PRIO_NORMAL 0
		254	#define PRIO_LOW -1
		255	#define PRIO_IDLE -3
		256	#define PRIO_MIN -4
		257
		258	/* for Coro.pm */
		259	static SV *coro_current;
		260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		261	static int coro_nready;
		262	static struct coro *coro_first;
		263
		264	/** lowlevel stuff **********************************************************/
		265
		266	static SV *
		267	coro_get_sv (const char *name, int create)
		268	{
		269	#if PERL_VERSION_ATLEAST (5,9,0)
		270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		271	get_sv (name, create);
		272	#endif
		273	return get_sv (name, create);
		274	}
		275
		276	static AV *
		277	coro_get_av (const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,9,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_av (name, create);
		282	#endif
		283	return get_av (name, create);
		284	}
		285
		286	static HV *
		287	coro_get_hv (const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,9,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_hv (name, create);
		292	#endif
		293	return get_hv (name, create);
		294	}
		295
161	static AV *	296	static AV *
162	coro_clone_padlist (pTHX_ CV *cv)	297	coro_clone_padlist (pTHX_ CV *cv)
163	{	298	{
164	AV *padlist = CvPADLIST (cv);	299	AV *padlist = CvPADLIST (cv);
165	AV *newpadlist, *newpad;	300	AV *newpadlist, *newpad;
166		301
167	newpadlist = newAV ();	302	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	303	AvREAL_off (newpadlist);
169	#if PERL_VERSION < 9	304	#if PERL_VERSION_ATLEAST (5,9,0)
		305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		306	#else
170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173	#endif	308	#endif
174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	309	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175	--AvFILLp (padlist);	310	--AvFILLp (padlist);
176		311
177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	312	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
221		356
222	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define PERL_MAGIC_coro PERL_MAGIC_ext
223		358
224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225		360
		361	#define CORO_MAGIC(cv) \
		362	SvMAGIC (cv) \
		363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		364	? SvMAGIC (cv) \
		365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		366	: 0
		367
		368	static struct coro *
		369	SvSTATE_ (pTHX_ SV *coro)
		370	{
		371	HV *stash;
		372	MAGIC *mg;
		373
		374	if (SvROK (coro))
		375	coro = SvRV (coro);
		376
		377	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		378	croak ("Coro::State object required");
		379
		380	stash = SvSTASH (coro);
		381	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		382	{
		383	/* very slow, but rare, check */
		384	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		385	croak ("Coro::State object required");
		386	}
		387
		388	mg = CORO_MAGIC (coro);
		389	return (struct coro *)mg->mg_ptr;
		390	}
		391
		392	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		393
226	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
227	static void	395	static void
228	get_padlist (pTHX_ CV *cv)	396	get_padlist (pTHX_ CV *cv)
229	{	397	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
231		400
232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234	else	403	else
235	{	404	{
236	#if 0	405	#if CORO_PREFER_PERL_FUNCTIONS
237	/* this should work - but it doesn't :( */	406	/* this is probably cleaner, but also slower? */
238	CV *cp = Perl_cv_clone (aTHX_ cv);	407	CV *cp = Perl_cv_clone (cv);
239	CvPADLIST (cv) = CvPADLIST (cp);	408	CvPADLIST (cv) = CvPADLIST (cp);
240	CvPADLIST (cp) = 0;	409	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (cp);	410	SvREFCNT_dec (cp);
242	#else	411	#else
243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
246	}	415	}
247		416
248	static void	417	static void
249	put_padlist (pTHX_ CV *cv)	418	put_padlist (pTHX_ CV *cv)
250	{	419	{
251	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	420	MAGIC *mg = CORO_MAGIC (cv);
		421	AV *av;
252		422
253	if (!mg)	423	if (expect_false (!mg))
254	{	424	{
255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
258	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
259	}	429	}
260		430
261	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	431	av = (AV *)mg->mg_obj;
262	}
263		432
264	#define SB do {	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
265	#define SE } while (0)	434	av_extend (av, AvMAX (av) + 1);
266		435
267	#define LOAD(state) load_state(aTHX_ (state));	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	437	}
269		438
270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	439	/** load & save, init *******************************************************/
271		440
272	static void	441	static void
273	load_state(pTHX_ Coro__State c)	442	load_perl (pTHX_ Coro__State c)
274	{	443	{
275	PL_dowarn = c->dowarn;	444	perl_slots *slot = c->slot;
276	PL_in_eval = c->in_eval;	445	c->slot = 0;
277		446
278	PL_curstackinfo = c->curstackinfo;
279	PL_curstack = c->curstack;
280	PL_mainstack = c->mainstack;	447	PL_mainstack = c->mainstack;
281	PL_stack_sp = c->stack_sp;
282	PL_op = c->op;
283	PL_curpad = c->curpad;
284	PL_comppad = c->comppad;
285	PL_compcv = c->compcv;
286	PL_stack_base = c->stack_base;
287	PL_stack_max = c->stack_max;
288	PL_tmps_stack = c->tmps_stack;
289	PL_tmps_floor = c->tmps_floor;
290	PL_tmps_ix = c->tmps_ix;
291	PL_tmps_max = c->tmps_max;
292	PL_markstack = c->markstack;
293	PL_markstack_ptr = c->markstack_ptr;
294	PL_markstack_max = c->markstack_max;
295	PL_scopestack = c->scopestack;
296	PL_scopestack_ix = c->scopestack_ix;
297	PL_scopestack_max = c->scopestack_max;
298	PL_savestack = c->savestack;
299	PL_savestack_ix = c->savestack_ix;
300	PL_savestack_max = c->savestack_max;
301	#if PERL_VERSION < 9
302	PL_retstack = c->retstack;
303	PL_retstack_ix = c->retstack_ix;
304	PL_retstack_max = c->retstack_max;
305	#endif
306	PL_curpm = c->curpm;
307	PL_curcop = c->curcop;
308		448
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	449	GvSV (PL_defgv) = slot->defsv;
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	450	GvAV (PL_defgv) = slot->defav;
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	451	GvSV (PL_errgv) = slot->errsv;
		452	GvSV (irsgv) = slot->irsgv;
		453
		454	#define VAR(name,type) PL_ ## name = slot->name;
		455	# include "state.h"
		456	#undef VAR
		457
		458	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
		459	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
312		460
313	{	461	{
314	dSP;	462	dSP;
		463
315	CV *cv;	464	CV *cv;
316		465
317	/* now do the ugly restore mess */	466	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	467	while (expect_true (cv = (CV *)POPs))
319	{	468	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	469	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	470	CvDEPTH (cv) = PTR2IV (POPs);
326	}	471	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	472	}
330		473
331	PUTBACK;	474	PUTBACK;
332	}	475	}
333	}	476	}
334		477
335	static void	478	static void
336	save_state(pTHX_ Coro__State c, int flags)	479	save_perl (pTHX_ Coro__State c)
337	{	480	{
338	{	481	{
339	dSP;	482	dSP;
340	I32 cxix = cxstack_ix;	483	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	484	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	487	/*
345	* the worst thing you can imagine happens first - we have to save	488	* the worst thing you can imagine happens first - we have to save
346	* (and reinitialize) all cv's in the whole callchain :(	489	* (and reinitialize) all cv's in the whole callchain :(
347	*/	490	*/
348		491
349	PUSHs (Nullsv);	492	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	493	/* this loop was inspired by pp_caller */
351	for (;;)	494	for (;;)
352	{	495	{
353	while (cxix >= 0)	496	while (expect_true (cxix >= 0))
354	{	497	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	498	PERL_CONTEXT *cx = &ccstk[cxix--];
356		499
357	if (CxTYPE(cx) == CXt_SUB)	500	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
358	{	501	{
359	CV *cv = cx->blk_sub.cv;	502	CV *cv = cx->blk_sub.cv;
		503
360	if (CvDEPTH(cv))	504	if (expect_true (CvDEPTH (cv)))
361	{	505	{
362	EXTEND (SP, CvDEPTH(cv)*2);	506	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	507	PUSHs ((SV *)CvPADLIST (cv));
		508	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	509	PUSHs ((SV *)cv);
373		510
		511	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	512	get_padlist (aTHX_ cv);
375	}	513	}
376	}	514	}
377	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)
379	{
380	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}
384	#endif
385	}	515	}
386		516
387	if (top_si->si_type == PERLSI_MAIN)	517	if (expect_true (top_si->si_type == PERLSI_MAIN))
388	break;	518	break;
389		519
390	top_si = top_si->si_prev;	520	top_si = top_si->si_prev;
391	ccstk = top_si->si_cxstack;	521	ccstk = top_si->si_cxstack;
392	cxix = top_si->si_cxix;	522	cxix = top_si->si_cxix;
393	}	523	}
394		524
395	PUTBACK;	525	PUTBACK;
396	}	526	}
397		527
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	528	/* allocate some space on the context stack for our purposes */
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	529	/* we manually unroll here, as usually 2 slots is enough */
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	530	if (SLOT_COUNT >= 1) CXINC;
		531	if (SLOT_COUNT >= 2) CXINC;
		532	if (SLOT_COUNT >= 3) CXINC;
		533	{
		534	int i;
		535	for (i = 3; i < SLOT_COUNT; ++i)
		536	CXINC;
		537	}
		538	cxstack_ix -= SLOT_COUNT; /* undo allocation */
401		539
402	c->dowarn = PL_dowarn;
403	c->in_eval = PL_in_eval;
404
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;	540	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;	541
409	c->op = PL_op;	542	{
410	c->curpad = PL_curpad;	543	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411	c->comppad = PL_comppad;	544
412	c->compcv = PL_compcv;	545	slot->defav = GvAV (PL_defgv);
413	c->stack_base = PL_stack_base;	546	slot->defsv = DEFSV;
414	c->stack_max = PL_stack_max;	547	slot->errsv = ERRSV;
415	c->tmps_stack = PL_tmps_stack;	548	slot->irsgv = GvSV (irsgv);
416	c->tmps_floor = PL_tmps_floor;	549
417	c->tmps_ix = PL_tmps_ix;	550	#define VAR(name,type) slot->name = PL_ ## name;
418	c->tmps_max = PL_tmps_max;	551	# include "state.h"
419	c->markstack = PL_markstack;	552	#undef VAR
420	c->markstack_ptr = PL_markstack_ptr;	553	}
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	}	554	}
436		555
437	/*	556	/*
438	* allocate various perl stacks. This is an exact copy	557	* allocate various perl stacks. This is an exact copy
439	* of perl.c:init_stacks, except that it uses less memory	558	* of perl.c:init_stacks, except that it uses less memory
440	* on the (sometimes correct) assumption that coroutines do	559	* on the (sometimes correct) assumption that coroutines do
441	* not usually need a lot of stackspace.	560	* not usually need a lot of stackspace.
442	*/	561	*/
		562	#if CORO_PREFER_PERL_FUNCTIONS
		563	# define coro_init_stacks init_stacks
		564	#else
443	static void	565	static void
444	coro_init_stacks (pTHX)	566	coro_init_stacks (pTHX)
445	{	567	{
446	LOCK;	568	PL_curstackinfo = new_stackinfo(32, 8);
447
448	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
449	PL_curstackinfo->si_type = PERLSI_MAIN;	569	PL_curstackinfo->si_type = PERLSI_MAIN;
450	PL_curstack = PL_curstackinfo->si_stack;	570	PL_curstack = PL_curstackinfo->si_stack;
451	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	571	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452		572
453	PL_stack_base = AvARRAY(PL_curstack);	573	PL_stack_base = AvARRAY(PL_curstack);
454	PL_stack_sp = PL_stack_base;	574	PL_stack_sp = PL_stack_base;
455	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	575	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456		576
457	New(50,PL_tmps_stack,96,SV*);	577	New(50,PL_tmps_stack,32,SV*);
458	PL_tmps_floor = -1;	578	PL_tmps_floor = -1;
459	PL_tmps_ix = -1;	579	PL_tmps_ix = -1;
460	PL_tmps_max = 96;	580	PL_tmps_max = 32;
461		581
462	New(54,PL_markstack,16,I32);	582	New(54,PL_markstack,16,I32);
463	PL_markstack_ptr = PL_markstack;	583	PL_markstack_ptr = PL_markstack;
464	PL_markstack_max = PL_markstack + 16;	584	PL_markstack_max = PL_markstack + 16;
465		585
466	#ifdef SET_MARK_OFFSET	586	#ifdef SET_MARK_OFFSET
467	SET_MARK_OFFSET;	587	SET_MARK_OFFSET;
468	#endif	588	#endif
469		589
470	New(54,PL_scopestack,16,I32);	590	New(54,PL_scopestack,8,I32);
471	PL_scopestack_ix = 0;	591	PL_scopestack_ix = 0;
472	PL_scopestack_max = 16;	592	PL_scopestack_max = 8;
473		593
474	New(54,PL_savestack,96,ANY);	594	New(54,PL_savestack,24,ANY);
475	PL_savestack_ix = 0;	595	PL_savestack_ix = 0;
476	PL_savestack_max = 96;	596	PL_savestack_max = 24;
477		597
478	#if PERL_VERSION < 9	598	#if !PERL_VERSION_ATLEAST (5,9,0)
479	New(54,PL_retstack,8,OP*);	599	New(54,PL_retstack,4,OP*);
480	PL_retstack_ix = 0;	600	PL_retstack_ix = 0;
481	PL_retstack_max = 8;	601	PL_retstack_max = 4;
482	#endif	602	#endif
483
484	UNLOCK;
485	}	603	}
		604	#endif
486		605
487	/*	606	/*
488	* destroy the stacks, the callchain etc...	607	* destroy the stacks, the callchain etc...
489	*/	608	*/
490	static void	609	static void
491	destroy_stacks(pTHX)	610	coro_destroy_stacks (pTHX)
492	{	611	{
493	if (!IN_DESTRUCT)
494	{
495	/* is this ugly, I ask? */
496	LEAVE_SCOPE (0);
497
498	/* sure it is, but more important: is it correct?? :/ */
499	FREETMPS;
500
501	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
502	}
503
504	while (PL_curstackinfo->si_next)	612	while (PL_curstackinfo->si_next)
505	PL_curstackinfo = PL_curstackinfo->si_next;	613	PL_curstackinfo = PL_curstackinfo->si_next;
506		614
507	while (PL_curstackinfo)	615	while (PL_curstackinfo)
508	{	616	{
509	PERL_SI *p = PL_curstackinfo->si_prev;	617	PERL_SI *p = PL_curstackinfo->si_prev;
510		618
511	{ /*D*//*remove*/
512	dSP;
513	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514	PUTBACK; /* possibly superfluous */
515	}
516
517	if (!IN_DESTRUCT)	619	if (!IN_DESTRUCT)
518	{
519	dounwind (-1);/*D*//*remove*/
520	SvREFCNT_dec (PL_curstackinfo->si_stack);	620	SvREFCNT_dec (PL_curstackinfo->si_stack);
521	}
522		621
523	Safefree (PL_curstackinfo->si_cxstack);	622	Safefree (PL_curstackinfo->si_cxstack);
524	Safefree (PL_curstackinfo);	623	Safefree (PL_curstackinfo);
525	PL_curstackinfo = p;	624	PL_curstackinfo = p;
526	}	625	}
527		626
528	Safefree (PL_tmps_stack);	627	Safefree (PL_tmps_stack);
529	Safefree (PL_markstack);	628	Safefree (PL_markstack);
530	Safefree (PL_scopestack);	629	Safefree (PL_scopestack);
531	Safefree (PL_savestack);	630	Safefree (PL_savestack);
532	#if PERL_VERSION < 9	631	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree (PL_retstack);	632	Safefree (PL_retstack);
534	#endif	633	#endif
535	}	634	}
536		635
537	static void	636	static size_t
538	setup_coro (struct coro *coro)	637	coro_rss (pTHX_ struct coro *coro)
		638	{
		639	size_t rss = sizeof (*coro);
		640
		641	if (coro->mainstack)
		642	{
		643	perl_slots tmp_slot;
		644	perl_slots *slot;
		645
		646	if (coro->flags & CF_RUNNING)
		647	{
		648	slot = &tmp_slot;
		649
		650	#define VAR(name,type) slot->name = PL_ ## name;
		651	# include "state.h"
		652	#undef VAR
		653	}
		654	else
		655	slot = coro->slot;
		656
		657	rss += sizeof (slot->curstackinfo);
		658	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		659	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		660	rss += slot->tmps_max * sizeof (SV *);
		661	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		662	rss += slot->scopestack_max * sizeof (I32);
		663	rss += slot->savestack_max * sizeof (ANY);
		664
		665	#if !PERL_VERSION_ATLEAST (5,9,0)
		666	rss += slot->retstack_max * sizeof (OP *);
		667	#endif
		668	}
		669
		670	return rss;
		671	}
		672
		673	/** coroutine stack handling ************************************************/
		674
		675	static void
		676	coro_setup (pTHX_ struct coro *coro)
539	{	677	{
540	/*	678	/*
541	* emulate part of the perl startup here.	679	* emulate part of the perl startup here.
542	*/	680	*/
543	dTHX;	681	coro_init_stacks (aTHX);
		682
		683	PL_runops = RUNOPS_DEFAULT;
		684	PL_curcop = &PL_compiling;
		685	PL_in_eval = EVAL_NULL;
		686	PL_comppad = 0;
		687	PL_curpm = 0;
		688	PL_curpad = 0;
		689	PL_localizing = 0;
		690	PL_dirty = 0;
		691	PL_restartop = 0;
		692	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		693	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		694
		695	GvSV (PL_defgv) = newSV (0);
		696	GvAV (PL_defgv) = coro->args; coro->args = 0;
		697	GvSV (PL_errgv) = newSV (0);
		698	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		699	PL_rs = newSVsv (GvSV (irsgv));
		700	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		701
		702	{
		703	dSP;
		704	LOGOP myop;
		705
		706	Zero (&myop, 1, LOGOP);
		707	myop.op_next = Nullop;
		708	myop.op_flags = OPf_WANT_VOID;
		709
		710	PUSHMARK (SP);
		711	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		712	PUTBACK;
		713	PL_op = (OP *)&myop;
		714	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		715	SPAGAIN;
		716	}
		717
		718	/* this newly created coroutine might be run on an existing cctx which most
		719	* likely was suspended in set_stacklevel, called from entersub.
		720	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		721	* so we ENTER here for symmetry
		722	*/
		723	ENTER;
		724	}
		725
		726	static void
		727	coro_destroy (pTHX_ struct coro *coro)
		728	{
		729	if (!IN_DESTRUCT)
		730	{
		731	/* restore all saved variables and stuff */
		732	LEAVE_SCOPE (0);
		733	assert (PL_tmps_floor == -1);
		734
		735	/* free all temporaries */
		736	FREETMPS;
		737	assert (PL_tmps_ix == -1);
		738
		739	/* unwind all extra stacks */
		740	POPSTACK_TO (PL_mainstack);
		741
		742	/* unwind main stack */
		743	dounwind (-1);
		744	}
		745
		746	SvREFCNT_dec (GvSV (PL_defgv));
		747	SvREFCNT_dec (GvAV (PL_defgv));
		748	SvREFCNT_dec (GvSV (PL_errgv));
		749	SvREFCNT_dec (PL_defoutgv);
		750	SvREFCNT_dec (PL_rs);
		751	SvREFCNT_dec (GvSV (irsgv));
		752
		753	SvREFCNT_dec (PL_diehook);
		754	SvREFCNT_dec (PL_warnhook);
		755
		756	SvREFCNT_dec (coro->saved_deffh);
		757	SvREFCNT_dec (coro->throw);
		758
		759	coro_destroy_stacks (aTHX);
		760	}
		761
		762	static void
		763	free_coro_mortal (pTHX)
		764	{
		765	if (expect_true (coro_mortal))
		766	{
		767	SvREFCNT_dec (coro_mortal);
		768	coro_mortal = 0;
		769	}
		770	}
		771
		772	static int
		773	runops_trace (pTHX)
		774	{
		775	COP *oldcop = 0;
		776	int oldcxix = -2;
		777	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		778	coro_cctx *cctx = coro->cctx;
		779
		780	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		781	{
		782	PERL_ASYNC_CHECK ();
		783
		784	if (cctx->flags & CC_TRACE_ALL)
		785	{
		786	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		787	{
		788	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		789	SV **bot, **top;
		790	AV *av = newAV (); /* return values */
		791	SV **cb;
		792	dSP;
		793
		794	GV *gv = CvGV (cx->blk_sub.cv);
		795	SV *fullname = sv_2mortal (newSV (0));
		796	if (isGV (gv))
		797	gv_efullname3 (fullname, gv, 0);
		798
		799	bot = PL_stack_base + cx->blk_oldsp + 1;
		800	top = cx->blk_gimme == G_ARRAY ? SP + 1
		801	: cx->blk_gimme == G_SCALAR ? bot + 1
		802	: bot;
		803
		804	av_extend (av, top - bot);
		805	while (bot < top)
		806	av_push (av, SvREFCNT_inc (*bot++));
		807
		808	PL_runops = RUNOPS_DEFAULT;
		809	ENTER;
		810	SAVETMPS;
		811	EXTEND (SP, 3);
		812	PUSHMARK (SP);
		813	PUSHs (&PL_sv_no);
		814	PUSHs (fullname);
		815	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		816	PUTBACK;
		817	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		818	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		819	SPAGAIN;
		820	FREETMPS;
		821	LEAVE;
		822	PL_runops = runops_trace;
		823	}
		824
		825	if (oldcop != PL_curcop)
		826	{
		827	oldcop = PL_curcop;
		828
		829	if (PL_curcop != &PL_compiling)
		830	{
		831	SV **cb;
		832
		833	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		834	{
		835	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		836
		837	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		838	{
		839	runops_proc_t old_runops = PL_runops;
		840	dSP;
		841	GV *gv = CvGV (cx->blk_sub.cv);
		842	SV *fullname = sv_2mortal (newSV (0));
		843
		844	if (isGV (gv))
		845	gv_efullname3 (fullname, gv, 0);
		846
		847	PL_runops = RUNOPS_DEFAULT;
		848	ENTER;
		849	SAVETMPS;
		850	EXTEND (SP, 3);
		851	PUSHMARK (SP);
		852	PUSHs (&PL_sv_yes);
		853	PUSHs (fullname);
		854	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		855	PUTBACK;
		856	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		857	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		858	SPAGAIN;
		859	FREETMPS;
		860	LEAVE;
		861	PL_runops = runops_trace;
		862	}
		863
		864	oldcxix = cxstack_ix;
		865	}
		866
		867	if (cctx->flags & CC_TRACE_LINE)
		868	{
		869	dSP;
		870
		871	PL_runops = RUNOPS_DEFAULT;
		872	ENTER;
		873	SAVETMPS;
		874	EXTEND (SP, 3);
		875	PL_runops = RUNOPS_DEFAULT;
		876	PUSHMARK (SP);
		877	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		878	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		879	PUTBACK;
		880	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		881	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		882	SPAGAIN;
		883	FREETMPS;
		884	LEAVE;
		885	PL_runops = runops_trace;
		886	}
		887	}
		888	}
		889	}
		890	}
		891
		892	TAINT_NOT;
		893	return 0;
		894	}
		895
		896	/* inject a fake call to Coro::State::_cctx_init into the execution */
		897	/* _cctx_init should be careful, as it could be called at almost any time */
		898	/* during execution of a perl program */
		899	static void NOINLINE
		900	cctx_prepare (pTHX_ coro_cctx *cctx)
		901	{
544	dSP;	902	dSP;
545	UNOP myop;	903	LOGOP myop;
546	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547		904
548	coro_init_stacks (aTHX);	905	PL_top_env = &PL_start_env;
549	/*PL_curcop = 0;*/
550	/*PL_in_eval = PL_in_eval;*/ /* inherit */
551	SvREFCNT_dec (GvAV (PL_defgv));
552	GvAV (PL_defgv) = coro->args; coro->args = 0;
553		906
554	SPAGAIN;	907	if (cctx->flags & CC_TRACE)
		908	PL_runops = runops_trace;
555		909
556	Zero (&myop, 1, UNOP);	910	Zero (&myop, 1, LOGOP);
557	myop.op_next = Nullop;	911	myop.op_next = PL_op;
558	myop.op_flags = OPf_WANT_VOID;	912	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559		913
		914	PUSHMARK (SP);
		915	EXTEND (SP, 2);
		916	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		917	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		918	PUTBACK;
560	PL_op = (OP *)&myop;	919	PL_op = (OP *)&myop;
561
562	PUSHMARK(SP);
563	XPUSHs (sub_init);
564	PUTBACK;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	920	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	921	SPAGAIN;
567
568	ENTER; /* necessary e.g. for dounwind */
569	}	922	}
570		923
		924	/*
		925	* this is a _very_ stripped down perl interpreter ;)
		926	*/
571	static void	927	static void
572	free_coro_mortal ()
573	{
574	if (coro_mortal)
575	{
576	SvREFCNT_dec (coro_mortal);
577	coro_mortal = 0;
578	}
579	}
580
581	static void
582	coro_run (void *arg)	928	cctx_run (void *arg)
583	{	929	{
		930	dTHX;
		931
		932	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		933	UNLOCK;
		934
		935	/* we now skip the entersub that lead to transfer() */
		936	PL_op = PL_op->op_next;
		937
		938	/* inject a fake subroutine call to cctx_init */
		939	cctx_prepare (aTHX_ (coro_cctx *)arg);
		940
		941	/* somebody or something will hit me for both perl_run and PL_restartop */
		942	PL_restartop = PL_op;
		943	perl_run (PL_curinterp);
		944
584	/*	945	/*
585	* this is a _very_ stripped down perl interpreter ;)	946	* If perl-run returns we assume exit() was being called or the coro
		947	* fell off the end, which seems to be the only valid (non-bug)
		948	* reason for perl_run to return. We try to exit by jumping to the
		949	* bootstrap-time "top" top_env, as we cannot restore the "main"
		950	* coroutine as Coro has no such concept
586	*/	951	*/
587	dTHX;
588	int ret;
589
590	UNLOCK;
591
592	PL_top_env = &PL_start_env;	952	PL_top_env = main_top_env;
593		953	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
595	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
596
597	/* continue at cctx_init, without entersub */
598	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599
600	/* somebody will hit me for both perl_run and PL_restartop */
601	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
602	printf ("ret %d\n", ret);//D
603
604	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
605	abort ();
606	}	954	}
607		955
608	static coro_stack *	956	static coro_cctx *
609	stack_new ()	957	cctx_new ()
610	{	958	{
611	coro_stack *stack;	959	coro_cctx *cctx;
		960	void *stack_start;
		961	size_t stack_size;
612		962
		963	++cctx_count;
		964
613	New (0, stack, 1, coro_stack);	965	Newz (0, cctx, 1, coro_cctx);
614		966
615	#if HAVE_MMAP	967	#if HAVE_MMAP
616
617	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	968	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
618	/* mmap suppsedly does allocate-on-write for us */	969	/* mmap supposedly does allocate-on-write for us */
619	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	970	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620		971
621	if (stack->sptr == (void *)-1)	972	if (cctx->sptr != (void *)-1)
622	{
623	perror ("FATAL: unable to mmap stack for coroutine");
624	_exit (EXIT_FAILURE);
625	}	973	{
626
627	# if STACKGUARD	974	# if CORO_STACKGUARD
628	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	975	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
629	# endif	976	# endif
		977	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		978	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		979	cctx->flags |= CC_MAPPED;
		980	}
		981	else
		982	#endif
		983	{
		984	cctx->ssize = coro_stacksize * (long)sizeof (long);
		985	New (0, cctx->sptr, coro_stacksize, long);
630		986
		987	if (!cctx->sptr)
		988	{
		989	perror ("FATAL: unable to allocate stack for coroutine");
		990	_exit (EXIT_FAILURE);
		991	}
		992
		993	stack_start = cctx->sptr;
		994	stack_size = cctx->ssize;
		995	}
		996
		997	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		998	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		999
		1000	return cctx;
		1001	}
		1002
		1003	static void
		1004	cctx_destroy (coro_cctx *cctx)
		1005	{
		1006	if (!cctx)
		1007	return;
		1008
		1009	--cctx_count;
		1010
		1011	#if CORO_USE_VALGRIND
		1012	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1013	#endif
		1014
		1015	#if HAVE_MMAP
		1016	if (cctx->flags & CC_MAPPED)
		1017	munmap (cctx->sptr, cctx->ssize);
		1018	else
		1019	#endif
		1020	Safefree (cctx->sptr);
		1021
		1022	Safefree (cctx);
		1023	}
		1024
		1025	/* wether this cctx should be destructed */
		1026	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1027
		1028	static coro_cctx *
		1029	cctx_get (pTHX)
		1030	{
		1031	while (expect_true (cctx_first))
		1032	{
		1033	coro_cctx *cctx = cctx_first;
		1034	cctx_first = cctx->next;
		1035	--cctx_idle;
		1036
		1037	if (expect_true (!CCTX_EXPIRED (cctx)))
		1038	return cctx;
		1039
		1040	cctx_destroy (cctx);
		1041	}
		1042
		1043	return cctx_new ();
		1044	}
		1045
		1046	static void
		1047	cctx_put (coro_cctx *cctx)
		1048	{
		1049	/* free another cctx if overlimit */
		1050	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1051	{
		1052	coro_cctx *first = cctx_first;
		1053	cctx_first = first->next;
		1054	--cctx_idle;
		1055
		1056	cctx_destroy (first);
		1057	}
		1058
		1059	++cctx_idle;
		1060	cctx->next = cctx_first;
		1061	cctx_first = cctx;
		1062	}
		1063
		1064	/** coroutine switching *****************************************************/
		1065
		1066	static void
		1067	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1068	{
		1069	if (expect_true (prev != next))
		1070	{
		1071	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1072	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1073
		1074	if (expect_false (next->flags & CF_RUNNING))
		1075	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1076
		1077	if (expect_false (next->flags & CF_DESTROYED))
		1078	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1079
		1080	if (
		1081	#if PERL_VERSION_ATLEAST (5,9,0)
		1082	expect_false (PL_parser)
631	#else	1083	#else
632		1084	expect_false (PL_lex_state != LEX_NOTPARSING)
633	stack->ssize = STACKSIZE * (long)sizeof (long);
634	New (0, stack->sptr, STACKSIZE, long);
635
636	if (!stack->sptr)
637	{
638	perror (stderr, "FATAL: unable to malloc stack for coroutine");
639	_exit (EXIT_FAILURE);
640	}
641
642	#endif	1085	#endif
643		1086	)
644	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	1087	croak ("Coro::State::transfer called while parsing, but this is not supported");
645
646	return stack;
647	}
648
649	static void
650	stack_free (coro_stack *stack)
651	{
652	if (!stack || stack == main_stack)
653	return;
654
655	#if HAVE_MMAP
656	munmap (stack->sptr, stack->ssize);
657	#else
658	Safefree (stack->sptr);
659	#endif
660
661	Safefree (stack);
662	}
663
664	static coro_stack *stack_first;
665
666	static coro_stack *
667	stack_get ()
668	{
669	coro_stack *stack;
670
671	if (stack_first)
672	{
673	stack = stack_first;
674	stack_first = stack->next;
675	}
676	else
677	{
678	stack = stack_new ();
679	PL_op = PL_op->op_next;
680	}	1088	}
681
682	return stack;
683	}	1089	}
684		1090
685	static void	1091	/* always use the TRANSFER macro */
686	stack_put (coro_stack *stack)	1092	static void NOINLINE
687	{
688	stack->next = stack_first;
689	stack_first = stack;
690	}
691
692	/* never call directly, always through the coro_state_transfer global variable */
693	static void
694	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1093	transfer (pTHX_ struct coro *prev, struct coro *next)
695	{	1094	{
696	dSTACKLEVEL;	1095	dSTACKLEVEL;
697		1096
698	/* sometimes transfer is only called to set idle_sp */	1097	/* sometimes transfer is only called to set idle_sp */
699	if (flags == TRANSFER_SET_STACKLEVEL)	1098	if (expect_false (!next))
		1099	{
700	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1100	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
701	else if (prev != next)	1101	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
702	{	1102	}
		1103	else if (expect_true (prev != next))
		1104	{
703	coro_stack *prev__stack;	1105	coro_cctx *prev__cctx;
		1106
		1107	if (expect_false (prev->flags & CF_NEW))
		1108	{
		1109	/* create a new empty context */
		1110	Newz (0, prev->cctx, 1, coro_cctx);
		1111	prev->flags &= ~CF_NEW;
		1112	prev->flags |= CF_RUNNING;
		1113	}
		1114
		1115	prev->flags &= ~CF_RUNNING;
		1116	next->flags |= CF_RUNNING;
704		1117
705	LOCK;	1118	LOCK;
706		1119
707	if (next->mainstack)	1120	if (expect_false (next->flags & CF_NEW))
708	{	1121	{
709	/* coroutine already started */	1122	/* need to start coroutine */
710	SAVE (prev, flags);	1123	next->flags &= ~CF_NEW;
711	LOAD (next);	1124	/* first get rid of the old state */
		1125	save_perl (aTHX_ prev);
		1126	/* setup coroutine call */
		1127	coro_setup (aTHX_ next);
712	}	1128	}
713	else	1129	else
714	{	1130	{
715	/* need to start coroutine */	1131	/* coroutine already started */
716	/* first get rid of the old state */	1132	save_perl (aTHX_ prev);
717	SAVE (prev, -1);	1133	load_perl (aTHX_ next);
718	/* setup coroutine call */
719	setup_coro (next);
720	/* need a stack */
721	next->stack = 0;
722	}	1134	}
723		1135
724	prev__stack = prev->stack;	1136	prev__cctx = prev->cctx;
725		1137
726	/* possibly "free" the stack */	1138	/* possibly "free" the cctx */
727	if (prev__stack->idle_sp == STACKLEVEL)	1139	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
728	{	1140	{
729	stack_put (prev__stack);	1141	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1142	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1143
730	prev->stack = 0;	1144	prev->cctx = 0;
		1145
		1146	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1147	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1148	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1149	if (!next->cctx)
		1150	next->cctx = cctx_get (aTHX);
		1151
		1152	cctx_put (prev__cctx);
731	}	1153	}
732		1154
733	if (!next->stack)	1155	++next->usecount;
734	next->stack = stack_get ();
735		1156
736	if (prev__stack != next->stack)	1157	if (expect_true (!next->cctx))
		1158	next->cctx = cctx_get (aTHX);
		1159
		1160	if (expect_false (prev__cctx != next->cctx))
737	{	1161	{
738	prev__stack->top_env = PL_top_env;	1162	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->stack->top_env;	1163	PL_top_env = next->cctx->top_env;
740	printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1164	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742	}	1165	}
743		1166
744	free_coro_mortal ();	1167	free_coro_mortal (aTHX);
745
746	UNLOCK;	1168	UNLOCK;
747	}
748	}
749		1169
750	/* use this function pointer to call the above function */	1170	if (expect_false (prev->throw || next->throw))
751	/* this is done to increase chances of the compiler not inlining the call */	1171	{
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */	1172	struct coro *coro = SvSTATE (coro_current);
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1173
		1174	if (coro->throw)
		1175	{
		1176	SV *exception = coro->throw;
		1177	coro->throw = 0;
		1178	sv_setsv (ERRSV, exception);
		1179	croak (0);
		1180	}
		1181	}
		1182	}
		1183	}
754		1184
755	struct transfer_args	1185	struct transfer_args
756	{	1186	{
757	struct coro *prev, *next;	1187	struct coro *prev, *next;
758	int flags;
759	};	1188	};
760		1189
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1190	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1191	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
762		1192
		1193	/** high level stuff ********************************************************/
		1194
763	static void	1195	static int
764	coro_state_destroy (struct coro *coro)	1196	coro_state_destroy (pTHX_ struct coro *coro)
765	{	1197	{
766	if (coro->refcnt--)	1198	if (coro->flags & CF_DESTROYED)
767	return;	1199	return 0;
		1200
		1201	coro->flags |= CF_DESTROYED;
		1202
		1203	if (coro->flags & CF_READY)
		1204	{
		1205	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1206	/* alternative: look through all ready queues and remove the coro */
		1207	LOCK;
		1208	--coro_nready;
		1209	UNLOCK;
		1210	}
		1211	else
		1212	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768		1213
769	if (coro->mainstack && coro->mainstack != main_mainstack)	1214	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	1215	{
771	struct coro temp;	1216	struct coro temp;
772		1217
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1218	if (coro->flags & CF_RUNNING)
		1219	croak ("FATAL: tried to destroy currently running coroutine");
		1220
		1221	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	1222	load_perl (aTHX_ coro);
775		1223
776	destroy_stacks (aTHX);	1224	coro_destroy (aTHX_ coro);
777		1225
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1226	load_perl (aTHX_ &temp);
779		1227
780	coro->mainstack = 0;	1228	coro->slot = 0;
781	}	1229	}
782		1230
783	stack_free (coro->stack);	1231	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	1232	SvREFCNT_dec (coro->args);
785	Safefree (coro);	1233
		1234	if (coro->next) coro->next->prev = coro->prev;
		1235	if (coro->prev) coro->prev->next = coro->next;
		1236	if (coro == coro_first) coro_first = coro->next;
		1237
		1238	return 1;
786	}	1239	}
787		1240
788	static int	1241	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	1242	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	1243	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	1244	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	1245	mg->mg_ptr = 0;
793		1246
		1247	coro->hv = 0;
		1248
		1249	if (--coro->refcnt < 0)
		1250	{
794	coro_state_destroy (coro);	1251	coro_state_destroy (aTHX_ coro);
		1252	Safefree (coro);
		1253	}
795		1254
796	return 0;	1255	return 0;
797	}	1256	}
798		1257
799	static int	1258	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1259	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	1260	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	1261	struct coro *coro = (struct coro *)mg->mg_ptr;
803		1262
804	++coro->refcnt;	1263	++coro->refcnt;
805		1264
806	return 0;	1265	return 0;
807	}	1266	}
808		1267
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1268	static MGVTBL coro_state_vtbl = {
		1269	0, 0, 0, 0,
		1270	coro_state_free,
		1271	0,
		1272	#ifdef MGf_DUP
		1273	coro_state_dup,
		1274	#else
		1275	# define MGf_DUP 0
		1276	#endif
		1277	};
810		1278
811	static struct coro *
812	SvSTATE (SV *coro)
813	{
814	HV *stash;
815	MAGIC *mg;
816
817	if (SvROK (coro))
818	coro = SvRV (coro);
819
820	stash = SvSTASH (coro);
821	if (stash != coro_stash && stash != coro_state_stash)
822	{
823	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");
826	}
827
828	mg = SvMAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;
831	}
832
833	static void	1279	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1280	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	1281	{
836	ta->prev = SvSTATE (prev);	1282	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	1283	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;	1284	TRANSFER_CHECK (*ta);
839	}	1285	}
840		1286
841	static void	1287	static void
842	api_transfer (SV *prev, SV *next, int flags)	1288	api_transfer (SV *prev_sv, SV *next_sv)
843	{	1289	{
844	dTHX;	1290	dTHX;
845	struct transfer_args ta;	1291	struct transfer_args ta;
846		1292
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	1293	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	1294	TRANSFER (ta);
849	}	1295	}
850		1296
851	/** Coro ********************************************************************/	1297	/** Coro ********************************************************************/
852		1298
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	1299	static void
866	coro_enq (pTHX_ SV *sv)	1300	coro_enq (pTHX_ SV *coro_sv)
867	{	1301	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	1302	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	1303	}
878		1304
879	static SV *	1305	static SV *
880	coro_deq (pTHX_ int min_prio)	1306	coro_deq (pTHX_ int min_prio)
881	{	1307	{
…		…
885	if (min_prio < 0)	1311	if (min_prio < 0)
886	min_prio = 0;	1312	min_prio = 0;
887		1313
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1314	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1315	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1316	return av_shift (coro_ready [prio]);
893	}
894		1317
895	return 0;	1318	return 0;
896	}	1319	}
897		1320
898	static void	1321	static int
899	api_ready (SV *coro)	1322	api_ready (SV *coro_sv)
900	{	1323	{
901	dTHX;	1324	dTHX;
		1325	struct coro *coro;
902		1326
903	if (SvROK (coro))	1327	if (SvROK (coro_sv))
904	coro = SvRV (coro);	1328	coro_sv = SvRV (coro_sv);
		1329
		1330	coro = SvSTATE (coro_sv);
		1331
		1332	if (coro->flags & CF_READY)
		1333	return 0;
		1334
		1335	coro->flags |= CF_READY;
905		1336
906	LOCK;	1337	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1338	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1339	++coro_nready;
908	UNLOCK;	1340	UNLOCK;
909	}
910		1341
		1342	return 1;
		1343	}
		1344
911	static void	1345	static int
		1346	api_is_ready (SV *coro_sv)
		1347	{
		1348	dTHX;
		1349	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1350	}
		1351
		1352	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	1353	prepare_schedule (pTHX_ struct transfer_args *ta)
913	{	1354	{
914	SV *current, *prev, *next;	1355	SV *prev_sv, *next_sv;
		1356
		1357	for (;;)
		1358	{
		1359	LOCK;
		1360	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1361
		1362	/* nothing to schedule: call the idle handler */
		1363	if (expect_false (!next_sv))
		1364	{
		1365	dSP;
		1366	UNLOCK;
		1367
		1368	ENTER;
		1369	SAVETMPS;
		1370
		1371	PUSHMARK (SP);
		1372	PUTBACK;
		1373	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1374
		1375	FREETMPS;
		1376	LEAVE;
		1377	continue;
		1378	}
		1379
		1380	ta->next = SvSTATE (next_sv);
		1381
		1382	/* cannot transfer to destroyed coros, skip and look for next */
		1383	if (expect_false (ta->next->flags & CF_DESTROYED))
		1384	{
		1385	UNLOCK;
		1386	SvREFCNT_dec (next_sv);
		1387	/* coro_nready is already taken care of by destroy */
		1388	continue;
		1389	}
		1390
		1391	--coro_nready;
		1392	UNLOCK;
		1393	break;
		1394	}
		1395
		1396	/* free this only after the transfer */
		1397	prev_sv = SvRV (coro_current);
		1398	ta->prev = SvSTATE (prev_sv);
		1399	TRANSFER_CHECK (*ta);
		1400	assert (ta->next->flags & CF_READY);
		1401	ta->next->flags &= ~CF_READY;
		1402	SvRV_set (coro_current, next_sv);
915		1403
916	LOCK;	1404	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	free_coro_mortal ();	1405	free_coro_mortal (aTHX);
951	coro_mortal = prev;	1406	coro_mortal = prev_sv;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;	1407	UNLOCK;
958	}	1408	}
959		1409
960	static void	1410	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1411	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1412	{
963	LOCK;	1413	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1414	prepare_schedule (aTHX_ ta);
		1415	}
		1416
		1417	static int
		1418	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1419	{
		1420	if (coro_nready)
		1421	{
		1422	SV *prev = SvRV (coro_current);
		1423	prepare_schedule (aTHX_ ta);
		1424	api_ready (prev);
		1425	return 1;
		1426	}
		1427	else
		1428	return 0;
968	}	1429	}
969		1430
970	static void	1431	static void
971	api_schedule (void)	1432	api_schedule (void)
972	{	1433	{
973	dTHX;	1434	dTHX;
974	struct transfer_args ta;	1435	struct transfer_args ta;
975		1436
976	prepare_schedule (&ta);	1437	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1438	TRANSFER (ta);
978	}	1439	}
979		1440
980	static void	1441	static int
981	api_cede (void)	1442	api_cede (void)
982	{	1443	{
983	dTHX;	1444	dTHX;
984	struct transfer_args ta;	1445	struct transfer_args ta;
985		1446
986	prepare_cede (&ta);	1447	prepare_cede (aTHX_ &ta);
		1448
		1449	if (expect_true (ta.prev != ta.next))
		1450	{
987	TRANSFER (ta);	1451	TRANSFER (ta);
		1452	return 1;
		1453	}
		1454	else
		1455	return 0;
988	}	1456	}
989		1457
		1458	static int
		1459	api_cede_notself (void)
		1460	{
		1461	dTHX;
		1462	struct transfer_args ta;
		1463
		1464	if (prepare_cede_notself (aTHX_ &ta))
		1465	{
		1466	TRANSFER (ta);
		1467	return 1;
		1468	}
		1469	else
		1470	return 0;
		1471	}
		1472
		1473	static void
		1474	api_trace (SV *coro_sv, int flags)
		1475	{
		1476	dTHX;
		1477	struct coro *coro = SvSTATE (coro_sv);
		1478
		1479	if (flags & CC_TRACE)
		1480	{
		1481	if (!coro->cctx)
		1482	coro->cctx = cctx_new ();
		1483	else if (!(coro->cctx->flags & CC_TRACE))
		1484	croak ("cannot enable tracing on coroutine with custom stack");
		1485
		1486	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1487	}
		1488	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1489	{
		1490	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1491
		1492	if (coro->flags & CF_RUNNING)
		1493	PL_runops = RUNOPS_DEFAULT;
		1494	else
		1495	coro->slot->runops = RUNOPS_DEFAULT;
		1496	}
		1497	}
		1498
990	MODULE = Coro::State PACKAGE = Coro::State	1499	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1500
992	PROTOTYPES: DISABLE	1501	PROTOTYPES: DISABLE
993		1502
994	BOOT:	1503	BOOT:
995	{	1504	{
996	#ifdef USE_ITHREADS	1505	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1506	MUTEX_INIT (&coro_mutex);
998	#endif	1507	#endif
999	BOOT_PAGESIZE;	1508	BOOT_PAGESIZE;
1000		1509
		1510	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1511	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1512
		1513	hv_sig = coro_get_hv ("SIG", TRUE);
		1514	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1515	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1516
		1517	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1518	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1519
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1520	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1521
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1522	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1523	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1524	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1525	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1526
1007	main_mainstack = PL_mainstack;	1527	main_mainstack = PL_mainstack;
		1528	main_top_env = PL_top_env;
		1529
		1530	while (main_top_env->je_prev)
		1531	main_top_env = main_top_env->je_prev;
1008		1532
1009	coroapi.ver = CORO_API_VERSION;	1533	coroapi.ver = CORO_API_VERSION;
		1534	coroapi.rev = CORO_API_REVISION;
1010	coroapi.transfer = api_transfer;	1535	coroapi.transfer = api_transfer;
1011
1012	Newz (0, main_stack, 1, coro_stack);
1013	main_stack->idle_sp = (void *)-1;
1014		1536
1015	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1537	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1016	}	1538	}
1017		1539
1018	SV *	1540	SV *
…		…
1022	struct coro *coro;	1544	struct coro *coro;
1023	HV *hv;	1545	HV *hv;
1024	int i;	1546	int i;
1025		1547
1026	Newz (0, coro, 1, struct coro);	1548	Newz (0, coro, 1, struct coro);
1027	coro->args = newAV ();	1549	coro->args = newAV ();
		1550	coro->flags = CF_NEW;
1028		1551
		1552	if (coro_first) coro_first->prev = coro;
		1553	coro->next = coro_first;
		1554	coro_first = coro;
		1555
1029	hv = newHV ();	1556	coro->hv = hv = newHV ();
1030	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1557	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1031	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1558	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032		1559
		1560	av_extend (coro->args, items - 1);
1033	for (i = 1; i < items; i++)	1561	for (i = 1; i < items; i++)
1034	av_push (coro->args, newSVsv (ST (i)));	1562	av_push (coro->args, newSVsv (ST (i)));
1035
1036	coro->stack = main_stack;
1037	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1038	/*coro->stack = 0;*/
1039	}	1563	}
1040	OUTPUT:	1564	OUTPUT:
1041	RETVAL	1565	RETVAL
1042		1566
		1567	# these not obviously related functions are all rolled into the same xs
		1568	# function to increase chances that they all will call transfer with the same
		1569	# stack offset
1043	void	1570	void
1044	_set_stacklevel (...)	1571	_set_stacklevel (...)
1045	ALIAS:	1572	ALIAS:
1046	Coro::State::transfer = 1	1573	Coro::State::transfer = 1
1047	Coro::schedule = 2	1574	Coro::schedule = 2
1048	Coro::cede = 3	1575	Coro::cede = 3
1049	Coro::Cont::yield = 4	1576	Coro::cede_notself = 4
1050	CODE:	1577	CODE:
1051	{	1578	{
1052	struct transfer_args ta;	1579	struct transfer_args ta;
1053		1580
1054	switch (ix)	1581	switch (ix)
1055	{	1582	{
1056	case 0:	1583	case 0:
1057	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1584	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1058	ta.next = 0;	1585	ta.next = 0;
1059	ta.flags = TRANSFER_SET_STACKLEVEL;
1060	break;	1586	break;
1061		1587
1062	case 1:	1588	case 1:
1063	if (items != 3)	1589	if (items != 2)
1064	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1590	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1065		1591
1066	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1592	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1067	break;	1593	break;
1068		1594
1069	case 2:	1595	case 2:
1070	prepare_schedule (&ta);	1596	prepare_schedule (aTHX_ &ta);
1071	break;	1597	break;
1072		1598
1073	case 3:	1599	case 3:
1074	prepare_cede (&ta);	1600	prepare_cede (aTHX_ &ta);
1075	break;	1601	break;
1076		1602
1077	case 4:	1603	case 4:
1078	{	1604	if (!prepare_cede_notself (aTHX_ &ta))
1079	SV *yieldstack;	1605	XSRETURN_EMPTY;
1080	SV *sv;
1081	AV *defav = GvAV (PL_defgv);
1082		1606
1083	yieldstack = *hv_fetch (
1084	(HV *)SvRV (GvSV (coro_current)),
1085	"yieldstack", sizeof ("yieldstack") - 1,
1086	0
1087	);
1088
1089	/* set up @_ -- ugly */
1090	av_clear (defav);
1091	av_fill (defav, items - 1);
1092	while (items--)
1093	av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095	sv = av_pop ((AV *)SvRV (yieldstack));
1096	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098	ta.flags = 0;
1099	SvREFCNT_dec (sv);
1100	}
1101	break;	1607	break;
1102
1103	}	1608	}
1104		1609
		1610	BARRIER;
		1611	PUTBACK;
1105	TRANSFER (ta);	1612	TRANSFER (ta);
		1613	SPAGAIN; /* might be the sp of a different coroutine now */
		1614	/* be extra careful not to ever do anything after TRANSFER */
1106	}	1615	}
1107		1616
1108	void	1617	bool
1109	_clone_state_from (SV *dst, SV *src)	1618	_destroy (SV *coro_sv)
1110	CODE:	1619	CODE:
1111	{	1620	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1112	struct coro *coro_src = SvSTATE (src);	1621	OUTPUT:
1113		1622	RETVAL
1114	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115
1116	++coro_src->refcnt;
1117	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118	}
1119
1120	void
1121	_nonlocal_goto (IV nextop)
1122	CODE:
1123	/* uuh, somebody will kill me again for this */
1124	PL_op->op_next = INT2PTR (OP *, nextop);
1125		1623
1126	void	1624	void
1127	_exit (code)	1625	_exit (code)
1128	int code	1626	int code
1129	PROTOTYPE: $	1627	PROTOTYPE: $
1130	CODE:	1628	CODE:
1131	_exit (code);	1629	_exit (code);
1132		1630
		1631	int
		1632	cctx_stacksize (int new_stacksize = 0)
		1633	CODE:
		1634	RETVAL = coro_stacksize;
		1635	if (new_stacksize)
		1636	coro_stacksize = new_stacksize;
		1637	OUTPUT:
		1638	RETVAL
		1639
		1640	int
		1641	cctx_count ()
		1642	CODE:
		1643	RETVAL = cctx_count;
		1644	OUTPUT:
		1645	RETVAL
		1646
		1647	int
		1648	cctx_idle ()
		1649	CODE:
		1650	RETVAL = cctx_idle;
		1651	OUTPUT:
		1652	RETVAL
		1653
		1654	void
		1655	list ()
		1656	PPCODE:
		1657	{
		1658	struct coro *coro;
		1659	for (coro = coro_first; coro; coro = coro->next)
		1660	if (coro->hv)
		1661	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1662	}
		1663
		1664	void
		1665	call (Coro::State coro, SV *coderef)
		1666	ALIAS:
		1667	eval = 1
		1668	CODE:
		1669	{
		1670	if (coro->mainstack)
		1671	{
		1672	struct coro temp;
		1673
		1674	if (!(coro->flags & CF_RUNNING))
		1675	{
		1676	save_perl (aTHX_ &temp);
		1677	load_perl (aTHX_ coro);
		1678	}
		1679
		1680	{
		1681	dSP;
		1682	ENTER;
		1683	SAVETMPS;
		1684	PUTBACK;
		1685	PUSHSTACK;
		1686	PUSHMARK (SP);
		1687
		1688	if (ix)
		1689	eval_sv (coderef, 0);
		1690	else
		1691	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1692
		1693	POPSTACK;
		1694	SPAGAIN;
		1695	FREETMPS;
		1696	LEAVE;
		1697	PUTBACK;
		1698	}
		1699
		1700	if (!(coro->flags & CF_RUNNING))
		1701	{
		1702	save_perl (aTHX_ coro);
		1703	load_perl (aTHX_ &temp);
		1704	}
		1705	}
		1706	}
		1707
		1708	SV *
		1709	is_ready (Coro::State coro)
		1710	PROTOTYPE: $
		1711	ALIAS:
		1712	is_ready = CF_READY
		1713	is_running = CF_RUNNING
		1714	is_new = CF_NEW
		1715	is_destroyed = CF_DESTROYED
		1716	CODE:
		1717	RETVAL = boolSV (coro->flags & ix);
		1718	OUTPUT:
		1719	RETVAL
		1720
		1721	void
		1722	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1723
		1724	SV *
		1725	has_stack (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = boolSV (!!coro->cctx);
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	int
		1733	is_traced (Coro::State coro)
		1734	PROTOTYPE: $
		1735	CODE:
		1736	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1737	OUTPUT:
		1738	RETVAL
		1739
		1740	IV
		1741	rss (Coro::State coro)
		1742	PROTOTYPE: $
		1743	ALIAS:
		1744	usecount = 1
		1745	CODE:
		1746	switch (ix)
		1747	{
		1748	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1749	case 1: RETVAL = coro->usecount; break;
		1750	}
		1751	OUTPUT:
		1752	RETVAL
		1753
		1754
1133	MODULE = Coro::State PACKAGE = Coro	1755	MODULE = Coro::State PACKAGE = Coro
1134		1756
1135	BOOT:	1757	BOOT:
1136	{	1758	{
1137	int i;	1759	int i;
1138		1760
		1761	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1762	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1763	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1764
		1765	coro_current = coro_get_sv ("Coro::current", FALSE);
		1766	SvREADONLY_on (coro_current);
		1767
1139	coro_stash = gv_stashpv ("Coro", TRUE);	1768	coro_stash = gv_stashpv ("Coro", TRUE);
1140		1769
1141	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1770	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1142	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1771	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1143	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1772	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1144	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1773	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1145	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1774	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1146	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1775	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1147		1776
1148	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1149	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1150
1151	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1777	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152	coro_ready[i] = newAV ();	1778	coro_ready[i] = newAV ();
1153		1779
1154	{	1780	{
1155	SV *sv = perl_get_sv("Coro::API", 1);	1781	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1782	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1156		1783
1157	coroapi.schedule = api_schedule;	1784	coroapi.schedule = api_schedule;
1158	coroapi.cede = api_cede;	1785	coroapi.cede = api_cede;
		1786	coroapi.cede_notself = api_cede_notself;
1159	coroapi.ready = api_ready;	1787	coroapi.ready = api_ready;
		1788	coroapi.is_ready = api_is_ready;
1160	coroapi.nready = &coro_nready;	1789	coroapi.nready = &coro_nready;
1161	coroapi.current = coro_current;	1790	coroapi.current = coro_current;
1162		1791
1163	GCoroAPI = &coroapi;	1792	GCoroAPI = &coroapi;
1164	sv_setiv (sv, (IV)&coroapi);	1793	sv_setiv (sv, (IV)&coroapi);
1165	SvREADONLY_on (sv);	1794	SvREADONLY_on (sv);
1166	}	1795	}
1167	}	1796	}
		1797
		1798	void
		1799	_set_current (SV *current)
		1800	PROTOTYPE: $
		1801	CODE:
		1802	SvREFCNT_dec (SvRV (coro_current));
		1803	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1168		1804
1169	int	1805	int
1170	prio (Coro::State coro, int newprio = 0)	1806	prio (Coro::State coro, int newprio = 0)
1171	ALIAS:	1807	ALIAS:
1172	nice = 1	1808	nice = 1
…		…
1175	RETVAL = coro->prio;	1811	RETVAL = coro->prio;
1176		1812
1177	if (items > 1)	1813	if (items > 1)
1178	{	1814	{
1179	if (ix)	1815	if (ix)
1180	newprio += coro->prio;	1816	newprio = coro->prio - newprio;
1181		1817
1182	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1818	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1183	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1819	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1184		1820
1185	coro->prio = newprio;	1821	coro->prio = newprio;
1186	}	1822	}
1187	}	1823	}
		1824	OUTPUT:
		1825	RETVAL
1188		1826
1189	void	1827	SV *
1190	ready (SV *self)	1828	ready (SV *self)
1191	PROTOTYPE: $	1829	PROTOTYPE: $
1192	CODE:	1830	CODE:
1193	api_ready (self);	1831	RETVAL = boolSV (api_ready (self));
		1832	OUTPUT:
		1833	RETVAL
1194		1834
1195	int	1835	int
1196	nready (...)	1836	nready (...)
1197	PROTOTYPE:	1837	PROTOTYPE:
1198	CODE:	1838	CODE:
1199	RETVAL = coro_nready;	1839	RETVAL = coro_nready;
1200	OUTPUT:	1840	OUTPUT:
1201	RETVAL	1841	RETVAL
1202		1842
		1843	void
		1844	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1845	PROTOTYPE: $;$
		1846	CODE:
		1847	SvREFCNT_dec (self->throw);
		1848	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1849
		1850	# for async_pool speedup
		1851	void
		1852	_pool_1 (SV *cb)
		1853	CODE:
		1854	{
		1855	struct coro *coro = SvSTATE (coro_current);
		1856	HV *hv = (HV *)SvRV (coro_current);
		1857	AV *defav = GvAV (PL_defgv);
		1858	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1859	AV *invoke_av;
		1860	int i, len;
		1861
		1862	if (!invoke)
		1863	croak ("\3async_pool terminate\2\n");
		1864
		1865	SvREFCNT_dec (coro->saved_deffh);
		1866	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1867
		1868	hv_store (hv, "desc", sizeof ("desc") - 1,
		1869	newSVpvn (strpair ("[async_pool]")), 0);
		1870
		1871	invoke_av = (AV *)SvRV (invoke);
		1872	len = av_len (invoke_av);
		1873
		1874	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1875
		1876	if (len > 0)
		1877	{
		1878	av_fill (defav, len - 1);
		1879	for (i = 0; i < len; ++i)
		1880	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1881	}
		1882
		1883	SvREFCNT_dec (invoke);
		1884	}
		1885
		1886	void
		1887	_pool_2 (SV *cb)
		1888	CODE:
		1889	{
		1890	struct coro *coro = SvSTATE (coro_current);
		1891
		1892	sv_setsv (cb, &PL_sv_undef);
		1893
		1894	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1895	coro->saved_deffh = 0;
		1896
		1897	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1898	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1899	croak ("\3async_pool terminate\2\n");
		1900
		1901	av_clear (GvAV (PL_defgv));
		1902	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1903	newSVpvn (strpair ("[async_pool idle]")), 0);
		1904
		1905	coro->prio = 0;
		1906
		1907	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1908	api_trace (coro_current, 0);
		1909
		1910	av_push (av_async_pool, newSVsv (coro_current));
		1911	}
		1912
		1913
1203	MODULE = Coro::State PACKAGE = Coro::AIO	1914	MODULE = Coro::State PACKAGE = Coro::AIO
1204		1915
1205	SV *	1916	SV *
1206	_get_state ()	1917	_get_state ()
1207	CODE:	1918	CODE:
1208	{	1919	{
1209	struct {	1920	struct io_state *data;
1210	int errorno;
1211	int laststype;
1212	int laststatval;
1213	Stat_t statcache;
1214	} data;
1215		1921
		1922	RETVAL = newSV (sizeof (struct io_state));
		1923	data = (struct io_state *)SvPVX (RETVAL);
		1924	SvCUR_set (RETVAL, sizeof (struct io_state));
		1925	SvPOK_only (RETVAL);
		1926
1216	data.errorno = errno;	1927	data->errorno = errno;
1217	data.laststype = PL_laststype;	1928	data->laststype = PL_laststype;
1218	data.laststatval = PL_laststatval;	1929	data->laststatval = PL_laststatval;
1219	data.statcache = PL_statcache;	1930	data->statcache = PL_statcache;
1220
1221	RETVAL = newSVpvn ((char *)&data, sizeof data);
1222	}	1931	}
1223	OUTPUT:	1932	OUTPUT:
1224	RETVAL	1933	RETVAL
1225		1934
1226	void	1935	void
1227	_set_state (char *data_)	1936	_set_state (char *data_)
1228	PROTOTYPE: $	1937	PROTOTYPE: $
1229	CODE:	1938	CODE:
1230	{	1939	{
1231	struct {	1940	struct io_state *data = (void *)data_;
1232	int errorno;
1233	int laststype;
1234	int laststatval;
1235	Stat_t statcache;
1236	} *data = (void *)data_;
1237		1941
1238	errno = data->errorno;	1942	errno = data->errorno;
1239	PL_laststype = data->laststype;	1943	PL_laststype = data->laststype;
1240	PL_laststatval = data->laststatval;	1944	PL_laststatval = data->laststatval;
1241	PL_statcache = data->statcache;	1945	PL_statcache = data->statcache;
1242	}	1946	}
		1947

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