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Comparing Coro/Coro/State.xs (file contents):
Revision 1.85 by root, Fri Nov 24 00:32:04 2006 UTC vs.
Revision 1.223 by root, Wed Feb 13 15:46:00 2008 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 <errno.h>	77	/* 5.8.8 */
		78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
		90	/* 5.8.7 */
		91	#ifndef SvRV_set
		92	# define SvRV_set(s,v) SvRV(s) = (v)
		93	#endif
33		94
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	96	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	97	#endif
52	# include <limits.h>	98
53	# ifndef PAGESIZE	99	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	100	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	101	#endif
60	#endif
61		102
62	#define SUB_INIT "Coro::State::initialize"	103	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	104	#ifndef CORO_PREFER_PERL_FUNCTIONS
		105	# define CORO_PREFER_PERL_FUNCTIONS 0
		106	#endif
64		107
65	/* The next macro should declare a variable stacklevel that contains and approximation	108	/* The next macros try to return the current stack pointer, in an as
66	* to the current C stack pointer. Its property is that it changes with each call	109	* portable way as possible. */
67	* and should be unique. */	110	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	111	#define STACKLEVEL ((void *)&stacklevel)
69		112
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		114
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	115	#if __GNUC__ >= 3
		116	# define attribute(x) __attribute__(x)
		117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
		119	#else
		120	# define attribute(x)
		121	# define BARRIER
		122	# define expect(expr,value) (expr)
		123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
		127
		128	#define NOINLINE attribute ((noinline))
73		129
74	#include "CoroAPI.h"	130	#include "CoroAPI.h"
75		131
76	#ifdef USE_ITHREADS	132	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	133	static perl_mutex coro_mutex;
…		…
80	#else	136	#else
81	# define LOCK (void)0	137	# define LOCK (void)0
82	# define UNLOCK (void)0	138	# define UNLOCK (void)0
83	#endif	139	#endif
84		140
		141	/* helper storage struct for Coro::AIO */
		142	struct io_state
		143	{
		144	int errorno;
		145	I32 laststype;
		146	int laststatval;
		147	Stat_t statcache;
		148	};
		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
85	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	152	static AV *main_mainstack; /* used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
87	static HV *coro_state_stash;	154	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	155	static volatile SV *coro_mortal; /* will be freed after next transfer */
91		156
92	/* this is actually not only the c stack but also c registers etc... */	157	static GV *irsgv; /* $/ */
		158	static GV *stdoutgv; /* *STDOUT */
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV *hv_sig; /* %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
		167
		168	static struct coro_cctx *cctx_first;
		169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		178	};
		179
		180	/* this is a structure representing a c-level coroutine */
		181	typedef struct coro_cctx {
		182	struct coro_cctx *next;
		183
		184	/* the stack */
		185	void *sptr;
		186	size_t ssize;
		187
		188	/* cpu state */
		189	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		190	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		191	JMPENV *top_env;
		192	coro_context cctx;
		193
		194	#if CORO_USE_VALGRIND
		195	int valgrind_id;
		196	#endif
		197	unsigned char flags;
		198	} coro_cctx;
		199
		200	enum {
		201	CF_RUNNING = 0x0001, /* coroutine is running */
		202	CF_READY = 0x0002, /* coroutine is ready */
		203	CF_NEW = 0x0004, /* has never been switched to */
		204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		205	};
		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
93	typedef struct {	208	typedef struct {
94	int refcnt; /* pointer reference counter */	209	SV *defsv;
95	int usecnt; /* shared by how many coroutines */	210	AV *defav;
96	int gencnt; /* generation counter */	211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
97		217
98	coro_context cctx;	218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99		219
100	void *sptr;	220	/* this is a structure representing a perl-level coroutine */
101	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103
104	struct coro {	221	struct coro {
105	/* the optional C context */	222	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	223	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109		224
110	/* optionally saved, might be zero */	225	/* process data */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;	226	AV *mainstack;
123	SV **stack_sp;	227	perl_slots *slot; /* basically the saved sp */
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149		228
150	/* data associated with this coroutine (initial args) */	229	AV *args; /* data associated with this coroutine (initial args) */
151	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
		231	int flags; /* CF_ flags */
		232	HV *hv; /* the perl hash associated with this coro, if any */
		233
		234	/* statistics */
		235	int usecount; /* number of transfers to this coro */
		236
		237	/* coro process data */
		238	int prio;
		239	SV *throw; /* exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
		243
		244	/* linked list */
		245	struct coro *next, *prev;
152	};	246	};
153		247
154	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
156		250
		251	/** Coro ********************************************************************/
		252
		253	#define PRIO_MAX 3
		254	#define PRIO_HIGH 1
		255	#define PRIO_NORMAL 0
		256	#define PRIO_LOW -1
		257	#define PRIO_IDLE -3
		258	#define PRIO_MIN -4
		259
		260	/* for Coro.pm */
		261	static SV *coro_current;
		262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		263	static int coro_nready;
		264	static struct coro *coro_first;
		265
		266	/** lowlevel stuff **********************************************************/
		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,9,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
		278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,9,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,9,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
157	static AV *	298	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
159	{	300	{
160	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	302	AV *newpadlist, *newpad;
162		303
163	newpadlist = newAV ();	304	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	305	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	306	#if PERL_VERSION_ATLEAST (5,9,0)
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		308	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	310	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	312	--AvFILLp (padlist);
172		313
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	314	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
208		349
209	/* casting is fun. */	350	/* casting is fun. */
210	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	free_padlist (aTHX_ padlist);	352	free_padlist (aTHX_ padlist);
212		353
213	SvREFCNT_dec (av);
214
215	return 0;	354	return 0;
216	}	355	}
217		356
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
219		359
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
		364
		365	#define CORO_MAGIC(sv,type) \
		366	SvMAGIC (sv) \
		367	? SvMAGIC (sv)->mg_type == type \
		368	? SvMAGIC (sv) \
		369	: mg_find (sv, type) \
		370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
221		400
222	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
223	static void	402	static void
224	get_padlist (pTHX_ CV *cv)	403	get_padlist (pTHX_ CV *cv)
225	{	404	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
		406	AV *av;
227		407
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	410	else
231	{	411	{
232	#if 0	412	#if CORO_PREFER_PERL_FUNCTIONS
233	/* this should work - but it doesn't :( */	413	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	414	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	415	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	416	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	417	SvREFCNT_dec (cp);
238	#else	418	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
242	}	422	}
243		423
244	static void	424	static void
245	put_padlist (pTHX_ CV *cv)	425	put_padlist (pTHX_ CV *cv)
246	{	426	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
		428	AV *av;
248		429
249	if (!mg)	430	if (expect_false (!mg))
250	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();
255	}
256		432
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	433	av = (AV *)mg->mg_obj;
258	}
259		434
260	#define SB do {	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
261	#define SE } while (0)	436	av_extend (av, AvMAX (av) + 1);
262		437
263	#define LOAD(state) load_state(aTHX_ (state));	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	439	}
265		440
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	441	/** load & save, init *******************************************************/
267		442
268	static void	443	static void
269	load_state(pTHX_ Coro__State c)	444	load_perl (pTHX_ Coro__State c)
270	{	445	{
271	PL_dowarn = c->dowarn;	446	perl_slots *slot = c->slot;
272	PL_in_eval = c->in_eval;	447	c->slot = 0;
273		448
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;	449	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		450
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	451	GvSV (PL_defgv) = slot->defsv;
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	452	GvAV (PL_defgv) = slot->defav;
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
		456	#define VAR(name,type) PL_ ## name = slot->name;
		457	# include "state.h"
		458	#undef VAR
309		459
310	{	460	{
311	dSP;	461	dSP;
		462
312	CV *cv;	463	CV *cv;
313		464
314	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
316	{	467	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
323	}	470	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	471	}
327		472
328	PUTBACK;	473	PUTBACK;
329	}	474	}
330	}	475	}
331		476
332	static void	477	static void
333	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
334	{	479	{
335	{	480	{
336	dSP;	481	dSP;
337	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	486	/*
342	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
344	*/	489	*/
345		490
346	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
348	for (;;)	493	for (;;)
349	{	494	{
350	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
351	{	496	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
353		498
354	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355	{	500	{
356	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
357	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
358	{	504	{
359	EXTEND (SP, CvDEPTH(cv)*2);	505	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));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
370		509
		510	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
372	}	512	}
373	}	513	}
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	}	514	}
383		515
384	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
385	break;	517	break;
386		518
387	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
390	}	522	}
391		523
392	PUTBACK;	524	PUTBACK;
393	}	525	}
394		526
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
398		538
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;	539	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;	540
406	c->op = PL_op;	541	{
407	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408	c->comppad = PL_comppad;	543
409	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
410	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
411	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
412	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
413	c->tmps_floor = PL_tmps_floor;	548
414	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
415	c->tmps_max = PL_tmps_max;	550	# include "state.h"
416	c->markstack = PL_markstack;	551	#undef VAR
417	c->markstack_ptr = PL_markstack_ptr;	552	}
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	c->top_env = PL_top_env;
433	}	553	}
434		554
435	/*	555	/*
436	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
440	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
441	static void	564	static void
442	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
443	{	566	{
444	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		571
451	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		575
455	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
456	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	579	PL_tmps_max = 32;
459		580
460	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
461	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
463		584
464	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
465	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
466	#endif	587	#endif
467		588
468	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
469	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
471		592
472	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
473	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	595	PL_savestack_max = 24;
475		596
476	#if PERL_VERSION < 9	597	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
478	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	600	PL_retstack_max = 4;
480	#endif	601	#endif
481
482	UNLOCK;
483	}	602	}
		603	#endif
484		604
485	/*	605	/*
486	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
487	*/	607	*/
488	static void	608	static void
489	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
490	{	610	{
491	if (!IN_DESTRUCT)
492	{
493	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);
495
496	/* sure it is, but more important: is it correct?? :/ */
497	FREETMPS;
498
499	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
500	}
501
502	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
503	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
504		613
505	while (PL_curstackinfo)	614	while (PL_curstackinfo)
506	{	615	{
507	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
508		617
509	{ /*D*//*remove*/
510	dSP;
511	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512	PUTBACK; /* possibly superfluous */
513	}
514
515	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
516	{
517	dounwind (-1);/*D*//*remove*/
518	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
519	}
520		620
521	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
522	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
523	PL_curstackinfo = p;	623	PL_curstackinfo = p;
524	}	624	}
525		625
526	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	627	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	629	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	630	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	631	Safefree (PL_retstack);
532	#endif	632	#endif
533	}	633	}
534		634
535	static void	635	static size_t
536	allocate_stack (Coro__State ctx, int alloc)	636	coro_rss (pTHX_ struct coro *coro)
537	{	637	{
538	coro_stack *stack;	638	size_t rss = sizeof (*coro);
539		639
540	New (0, stack, 1, coro_stack);	640	if (coro->mainstack)
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{	641	{
548	#if HAVE_MMAP	642	perl_slots tmp_slot;
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	643	perl_slots *slot;
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	644
551	if (stack->sptr != (void *)-1)	645	if (coro->flags & CF_RUNNING)
552	{	646	{
553	# if STACKGUARD	647	slot = &tmp_slot;
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	648
555	# endif	649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
556	}	652	}
557	else	653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
558	#endif	666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
		674	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		675	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
559	{	713	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));	714	SV *old = *svp;
561	New (0, stack->sptr, STACKSIZE, long);	715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
562	}	718	}
563	}	719	}
564	else
565	stack->sptr = 0;
566		720
567	ctx->stack = stack;	721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
568	}	722	}
569		723
570	static void	724	static void
571	deallocate_stack (Coro__State ctx)	725	coro_setup (pTHX_ struct coro *coro)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	726	{
598	/*	727	/*
599	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
600	*/	729	*/
601	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605
606	coro_init_stacks (aTHX);	730	coro_init_stacks (aTHX);
607	/*PL_curcop = 0;*/	731
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */	732	PL_runops = RUNOPS_DEFAULT;
		733	PL_curcop = &PL_compiling;
		734	PL_in_eval = EVAL_NULL;
		735	PL_comppad = 0;
		736	PL_curpm = 0;
		737	PL_curpad = 0;
		738	PL_localizing = 0;
		739	PL_dirty = 0;
		740	PL_restartop = 0;
		741
		742	/* recreate the die/warn hooks */
		743	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		744	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		745
		746	GvSV (PL_defgv) = newSV (0);
		747	GvAV (PL_defgv) = coro->args; coro->args = 0;
		748	GvSV (PL_errgv) = newSV (0);
		749	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		750	PL_rs = newSVsv (GvSV (irsgv));
		751	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		752
		753	{
		754	dSP;
		755	LOGOP myop;
		756
		757	Zero (&myop, 1, LOGOP);
		758	myop.op_next = Nullop;
		759	myop.op_flags = OPf_WANT_VOID;
		760
		761	PUSHMARK (SP);
		762	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		763	PUTBACK;
		764	PL_op = (OP *)&myop;
		765	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		766	SPAGAIN;
		767	}
		768
		769	/* this newly created coroutine might be run on an existing cctx which most
		770	* likely was suspended in set_stacklevel, called from entersub.
		771	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		772	* so we ENTER here for symmetry
		773	*/
		774	ENTER;
		775	}
		776
		777	static void
		778	coro_destroy (pTHX_ struct coro *coro)
		779	{
		780	if (!IN_DESTRUCT)
		781	{
		782	/* restore all saved variables and stuff */
		783	LEAVE_SCOPE (0);
		784	assert (PL_tmps_floor == -1);
		785
		786	/* free all temporaries */
		787	FREETMPS;
		788	assert (PL_tmps_ix == -1);
		789
		790	/* unwind all extra stacks */
		791	POPSTACK_TO (PL_mainstack);
		792
		793	/* unwind main stack */
		794	dounwind (-1);
		795	}
		796
		797	SvREFCNT_dec (GvSV (PL_defgv));
609	SvREFCNT_dec (GvAV (PL_defgv));	798	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	799	SvREFCNT_dec (GvSV (PL_errgv));
		800	SvREFCNT_dec (PL_defoutgv);
		801	SvREFCNT_dec (PL_rs);
		802	SvREFCNT_dec (GvSV (irsgv));
611		803
612	SPAGAIN;	804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
613		809
614	if (ctx->stack)	810	coro_destroy_stacks (aTHX);
615	{
616	ctx->cursp = 0;
617
618	PUSHMARK(SP);
619	PUTBACK;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
621
622	if (SvTRUE (ERRSV))
623	croak (NULL);
624	else
625	croak ("FATAL: CCTXT coroutine returned!");
626	}
627	else
628	{
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;
649
650	ENTER; /* necessary e.g. for dounwind */
651	}
652	}	811	}
653		812
654	static void	813	static void
655	continue_coro (void *arg)	814	free_coro_mortal (pTHX)
656	{	815	{
657	/*	816	if (expect_true (coro_mortal))
658	* this is a _very_ stripped down perl interpreter ;)	817	{
659	*/	818	SvREFCNT_dec (coro_mortal);
660	dTHX;	819	coro_mortal = 0;
661	Coro__State ctx = (Coro__State)arg;
662
663	PL_top_env = &PL_start_env;
664
665	ctx->cursp = 0;
666	PL_op = PL_op->op_next;
667	CALLRUNOPS(aTHX);
668
669	abort ();
670	}
671
672	/* never call directly, always through the coro_state_transfer global variable */
673	static void
674	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
675	{
676	dSTACKLEVEL;
677
678	if (prev != next)
679	{	820	}
680	/* has this coro been created yet? */	821	}
681	if (next->mainstack)	822
		823	static int
		824	runops_trace (pTHX)
		825	{
		826	COP *oldcop = 0;
		827	int oldcxix = -2;
		828	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		829	coro_cctx *cctx = coro->cctx;
		830
		831	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		832	{
		833	PERL_ASYNC_CHECK ();
		834
		835	if (cctx->flags & CC_TRACE_ALL)
682	{	836	{
683	LOCK;	837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
684	SAVE (prev, flags);
685	LOAD (next);
686	UNLOCK;
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{	838	{
695	if (!prev->stack)	839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
696	allocate_stack (prev, 0);	840	SV **bot, **top;
697	else if (prev->cursp != stacklevel	841	AV *av = newAV (); /* return values */
698	&& prev->stack->usecnt > 1)	842	SV **cb;
		843	dSP;
		844
		845	GV *gv = CvGV (cx->blk_sub.cv);
		846	SV *fullname = sv_2mortal (newSV (0));
		847	if (isGV (gv))
		848	gv_efullname3 (fullname, gv, 0);
		849
		850	bot = PL_stack_base + cx->blk_oldsp + 1;
		851	top = cx->blk_gimme == G_ARRAY ? SP + 1
		852	: cx->blk_gimme == G_SCALAR ? bot + 1
		853	: bot;
		854
		855	av_extend (av, top - bot);
		856	while (bot < top)
		857	av_push (av, SvREFCNT_inc (*bot++));
		858
		859	PL_runops = RUNOPS_DEFAULT;
		860	ENTER;
		861	SAVETMPS;
		862	EXTEND (SP, 3);
		863	PUSHMARK (SP);
		864	PUSHs (&PL_sv_no);
		865	PUSHs (fullname);
		866	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		867	PUTBACK;
		868	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		869	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		870	SPAGAIN;
		871	FREETMPS;
		872	LEAVE;
		873	PL_runops = runops_trace;
		874	}
		875
		876	if (oldcop != PL_curcop)
		877	{
		878	oldcop = PL_curcop;
		879
		880	if (PL_curcop != &PL_compiling)
699	{	881	{
700	prev->gencnt = ++prev->stack->gencnt;	882	SV **cb;
701	prev->stack->usecnt = 1;
702	}
703		883
704	/* has our stack been invalidated? */	884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{	885	{
707	deallocate_stack (next);	886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
708	allocate_stack (next, 1);	887
709	coro_create (&(next->stack->cctx),	888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
710	continue_coro, (void *)next,	889	{
711	next->stack->sptr, labs (next->stack->ssize));	890	runops_proc_t old_runops = PL_runops;
		891	dSP;
		892	GV *gv = CvGV (cx->blk_sub.cv);
		893	SV *fullname = sv_2mortal (newSV (0));
		894
		895	if (isGV (gv))
		896	gv_efullname3 (fullname, gv, 0);
		897
		898	PL_runops = RUNOPS_DEFAULT;
		899	ENTER;
		900	SAVETMPS;
		901	EXTEND (SP, 3);
		902	PUSHMARK (SP);
		903	PUSHs (&PL_sv_yes);
		904	PUSHs (fullname);
		905	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		906	PUTBACK;
		907	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		908	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		909	SPAGAIN;
		910	FREETMPS;
		911	LEAVE;
		912	PL_runops = runops_trace;
		913	}
		914
		915	oldcxix = cxstack_ix;
712	}	916	}
713		917
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	918	if (cctx->flags & CC_TRACE_LINE)
715	prev->cursp = stacklevel;
716	/* don't add any code here */
717	}
718	else
719	next->cursp = stacklevel;
720	}
721	else if (next->tmps_ix == -2)
722	croak ("tried to transfer to running coroutine");
723	else
724	{
725	LOCK;
726	SAVE (prev, -1); /* first get rid of the old state */
727	UNLOCK;
728
729	/* create the coroutine for the first time */
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	/* the new coroutine starts with start_env again */
736	PL_top_env = &PL_start_env;
737
738	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739	{	919	{
740	setup_coro (next);	920	dSP;
741	next->cursp = stacklevel;
742		921
743	prev->stack->refcnt++;	922	PL_runops = RUNOPS_DEFAULT;
744	prev->stack->usecnt++;	923	ENTER;
745	next->stack = prev->stack;	924	SAVETMPS;
746	next->gencnt = prev->gencnt;	925	EXTEND (SP, 3);
		926	PL_runops = RUNOPS_DEFAULT;
		927	PUSHMARK (SP);
		928	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		929	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		930	PUTBACK;
		931	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		932	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		933	SPAGAIN;
		934	FREETMPS;
		935	LEAVE;
		936	PL_runops = runops_trace;
747	}	937	}
748	else
749	{
750	assert (!next->stack);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	setup_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756	prev->cursp = stacklevel;
757	/* don't add any code here */
758	}	938	}
759	}	939	}
		940	}
		941	}
		942
		943	TAINT_NOT;
		944	return 0;
		945	}
		946
		947	/* inject a fake call to Coro::State::_cctx_init into the execution */
		948	/* _cctx_init should be careful, as it could be called at almost any time */
		949	/* during execution of a perl program */
		950	static void NOINLINE
		951	cctx_prepare (pTHX_ coro_cctx *cctx)
		952	{
		953	dSP;
		954	LOGOP myop;
		955
		956	PL_top_env = &PL_start_env;
		957
		958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
		960
		961	Zero (&myop, 1, LOGOP);
		962	myop.op_next = PL_op;
		963	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		964
		965	PUSHMARK (SP);
		966	EXTEND (SP, 2);
		967	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		968	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		969	PUTBACK;
		970	PL_op = (OP *)&myop;
		971	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		972	SPAGAIN;
		973	}
		974
		975	/*
		976	* this is a _very_ stripped down perl interpreter ;)
		977	*/
		978	static void
		979	cctx_run (void *arg)
		980	{
		981	dTHX;
		982
		983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		984	UNLOCK;
		985
		986	/* we now skip the entersub that lead to transfer() */
		987	PL_op = PL_op->op_next;
		988
		989	/* inject a fake subroutine call to cctx_init */
		990	cctx_prepare (aTHX_ (coro_cctx *)arg);
		991
		992	/* somebody or something will hit me for both perl_run and PL_restartop */
		993	PL_restartop = PL_op;
		994	perl_run (PL_curinterp);
		995
		996	/*
		997	* If perl-run returns we assume exit() was being called or the coro
		998	* fell off the end, which seems to be the only valid (non-bug)
		999	* reason for perl_run to return. We try to exit by jumping to the
		1000	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1001	* coroutine as Coro has no such concept
		1002	*/
		1003	PL_top_env = main_top_env;
		1004	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1005	}
		1006
		1007	static coro_cctx *
		1008	cctx_new ()
		1009	{
		1010	coro_cctx *cctx;
		1011	void *stack_start;
		1012	size_t stack_size;
		1013
		1014	++cctx_count;
		1015
		1016	Newz (0, cctx, 1, coro_cctx);
		1017
		1018	#if HAVE_MMAP
		1019	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1020	/* mmap supposedly does allocate-on-write for us */
		1021	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1022
		1023	if (cctx->sptr != (void *)-1)
		1024	{
		1025	# if CORO_STACKGUARD
		1026	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1027	# endif
		1028	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1029	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1030	cctx->flags |= CC_MAPPED;
		1031	}
		1032	else
		1033	#endif
		1034	{
		1035	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1036	New (0, cctx->sptr, coro_stacksize, long);
		1037
		1038	if (!cctx->sptr)
		1039	{
		1040	perror ("FATAL: unable to allocate stack for coroutine");
		1041	_exit (EXIT_FAILURE);
		1042	}
		1043
		1044	stack_start = cctx->sptr;
		1045	stack_size = cctx->ssize;
		1046	}
		1047
		1048	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1049	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1050
		1051	return cctx;
		1052	}
		1053
		1054	static void
		1055	cctx_destroy (coro_cctx *cctx)
		1056	{
		1057	if (!cctx)
		1058	return;
		1059
		1060	--cctx_count;
		1061
		1062	#if CORO_USE_VALGRIND
		1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1064	#endif
		1065
		1066	#if HAVE_MMAP
		1067	if (cctx->flags & CC_MAPPED)
		1068	munmap (cctx->sptr, cctx->ssize);
		1069	else
		1070	#endif
		1071	Safefree (cctx->sptr);
		1072
		1073	Safefree (cctx);
		1074	}
		1075
		1076	/* wether this cctx should be destructed */
		1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1078
		1079	static coro_cctx *
		1080	cctx_get (pTHX)
		1081	{
		1082	while (expect_true (cctx_first))
		1083	{
		1084	coro_cctx *cctx = cctx_first;
		1085	cctx_first = cctx->next;
		1086	--cctx_idle;
		1087
		1088	if (expect_true (!CCTX_EXPIRED (cctx)))
		1089	return cctx;
		1090
		1091	cctx_destroy (cctx);
		1092	}
		1093
		1094	return cctx_new ();
		1095	}
		1096
		1097	static void
		1098	cctx_put (coro_cctx *cctx)
		1099	{
		1100	/* free another cctx if overlimit */
		1101	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1102	{
		1103	coro_cctx *first = cctx_first;
		1104	cctx_first = first->next;
		1105	--cctx_idle;
		1106
		1107	cctx_destroy (first);
		1108	}
		1109
		1110	++cctx_idle;
		1111	cctx->next = cctx_first;
		1112	cctx_first = cctx;
		1113	}
		1114
		1115	/** coroutine switching *****************************************************/
		1116
		1117	static void
		1118	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1119	{
		1120	if (expect_true (prev != next))
		1121	{
		1122	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1123	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1124
		1125	if (expect_false (next->flags & CF_RUNNING))
		1126	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1127
		1128	if (expect_false (next->flags & CF_DESTROYED))
		1129	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (
		1132	#if PERL_VERSION_ATLEAST (5,9,0)
		1133	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
		1134	#else
		1135	expect_false (PL_lex_state != LEX_NOTPARSING)
		1136	#endif
		1137	)
		1138	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1139	}
		1140	}
		1141
		1142	/* always use the TRANSFER macro */
		1143	static void NOINLINE
		1144	transfer (pTHX_ struct coro *prev, struct coro *next)
		1145	{
		1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
		1148
		1149	/* sometimes transfer is only called to set idle_sp */
		1150	if (expect_false (!next))
		1151	{
		1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1153	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1154	}
		1155	else if (expect_true (prev != next))
		1156	{
		1157	coro_cctx *prev__cctx;
		1158
		1159	if (expect_false (prev->flags & CF_NEW))
		1160	{
		1161	/* create a new empty context */
		1162	Newz (0, prev->cctx, 1, coro_cctx);
		1163	prev->flags &= ~CF_NEW;
		1164	prev->flags |= CF_RUNNING;
		1165	}
		1166
		1167	prev->flags &= ~CF_RUNNING;
		1168	next->flags |= CF_RUNNING;
		1169
		1170	LOCK;
		1171
		1172	/* first get rid of the old state */
		1173	save_perl (aTHX_ prev);
		1174
		1175	if (expect_false (next->flags & CF_NEW))
		1176	{
		1177	/* need to start coroutine */
		1178	next->flags &= ~CF_NEW;
		1179	/* setup coroutine call */
		1180	coro_setup (aTHX_ next);
		1181	}
760	else	1182	else
		1183	load_perl (aTHX_ next);
		1184
		1185	prev__cctx = prev->cctx;
		1186
		1187	/* possibly "free" the cctx */
		1188	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1189	{
		1190	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1191	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1192
		1193	prev->cctx = 0;
		1194
		1195	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1196	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1197	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1198	if (!next->cctx)
		1199	next->cctx = cctx_get (aTHX);
		1200
		1201	cctx_put (prev__cctx);
		1202	}
		1203
		1204	++next->usecount;
		1205
		1206	if (expect_true (!next->cctx))
		1207	next->cctx = cctx_get (aTHX);
		1208
		1209	has_throw = !!next->throw;
		1210
		1211	if (expect_false (prev__cctx != next->cctx))
		1212	{
		1213	prev__cctx->top_env = PL_top_env;
		1214	PL_top_env = next->cctx->top_env;
		1215	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1216	}
		1217
		1218	free_coro_mortal (aTHX);
		1219	UNLOCK;
		1220
		1221	if (expect_false (has_throw))
		1222	{
		1223	struct coro *coro = SvSTATE (coro_current);
		1224
		1225	if (coro->throw)
761	{	1226	{
		1227	SV *exception = coro->throw;
		1228	coro->throw = 0;
		1229	sv_setsv (ERRSV, exception);
762	setup_coro (next);	1230	croak (0);
763	next->cursp = stacklevel;
764	}	1231	}
765	}	1232	}
766	}	1233	}
		1234	}
		1235
		1236	struct transfer_args
		1237	{
		1238	struct coro *prev, *next;
		1239	};
		1240
		1241	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1242	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1243
		1244	/** high level stuff ********************************************************/
		1245
		1246	static int
		1247	coro_state_destroy (pTHX_ struct coro *coro)
		1248	{
		1249	if (coro->flags & CF_DESTROYED)
		1250	return 0;
		1251
		1252	coro->flags |= CF_DESTROYED;
		1253
		1254	if (coro->flags & CF_READY)
		1255	{
		1256	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1257	/* alternative: look through all ready queues and remove the coro */
		1258	LOCK;
		1259	--coro_nready;
		1260	UNLOCK;
		1261	}
		1262	else
		1263	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1264
		1265	if (coro->mainstack && coro->mainstack != main_mainstack)
		1266	{
		1267	struct coro temp;
		1268
		1269	if (coro->flags & CF_RUNNING)
		1270	croak ("FATAL: tried to destroy currently running coroutine");
		1271
		1272	save_perl (aTHX_ &temp);
		1273	load_perl (aTHX_ coro);
		1274
		1275	coro_destroy (aTHX_ coro);
		1276
		1277	load_perl (aTHX_ &temp);
		1278
		1279	coro->slot = 0;
		1280	}
		1281
		1282	cctx_destroy (coro->cctx);
		1283	SvREFCNT_dec (coro->args);
		1284
		1285	if (coro->next) coro->next->prev = coro->prev;
		1286	if (coro->prev) coro->prev->next = coro->next;
		1287	if (coro == coro_first) coro_first = coro->next;
		1288
		1289	return 1;
		1290	}
		1291
		1292	static int
		1293	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1294	{
		1295	struct coro *coro = (struct coro *)mg->mg_ptr;
		1296	mg->mg_ptr = 0;
		1297
		1298	coro->hv = 0;
		1299
		1300	if (--coro->refcnt < 0)
		1301	{
		1302	coro_state_destroy (aTHX_ coro);
		1303	Safefree (coro);
		1304	}
		1305
		1306	return 0;
		1307	}
		1308
		1309	static int
		1310	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1311	{
		1312	struct coro *coro = (struct coro *)mg->mg_ptr;
		1313
		1314	++coro->refcnt;
		1315
		1316	return 0;
		1317	}
		1318
		1319	static MGVTBL coro_state_vtbl = {
		1320	0, 0, 0, 0,
		1321	coro_state_free,
		1322	0,
		1323	#ifdef MGf_DUP
		1324	coro_state_dup,
		1325	#else
		1326	# define MGf_DUP 0
		1327	#endif
		1328	};
		1329
		1330	static void
		1331	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1332	{
		1333	ta->prev = SvSTATE (prev_sv);
		1334	ta->next = SvSTATE (next_sv);
		1335	TRANSFER_CHECK (*ta);
		1336	}
		1337
		1338	static void
		1339	api_transfer (SV *prev_sv, SV *next_sv)
		1340	{
		1341	dTHX;
		1342	struct transfer_args ta;
		1343
		1344	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1345	TRANSFER (ta);
		1346	}
		1347
		1348	/** Coro ********************************************************************/
		1349
		1350	static void
		1351	coro_enq (pTHX_ SV *coro_sv)
		1352	{
		1353	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1354	}
		1355
		1356	static SV *
		1357	coro_deq (pTHX)
		1358	{
		1359	int prio;
		1360
		1361	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1362	if (AvFILLp (coro_ready [prio]) >= 0)
		1363	return av_shift (coro_ready [prio]);
		1364
		1365	return 0;
		1366	}
		1367
		1368	static int
		1369	api_ready (SV *coro_sv)
		1370	{
		1371	dTHX;
		1372	struct coro *coro;
		1373
		1374	if (SvROK (coro_sv))
		1375	coro_sv = SvRV (coro_sv);
		1376
		1377	coro = SvSTATE (coro_sv);
		1378
		1379	if (coro->flags & CF_READY)
		1380	return 0;
		1381
		1382	coro->flags |= CF_READY;
767		1383
768	LOCK;	1384	LOCK;
769	if (coro_mortal)	1385	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
770	{	1386	++coro_nready;
771	SvREFCNT_dec (coro_mortal);
772	coro_mortal = 0;
773	}
774	UNLOCK;	1387	UNLOCK;
775	}
776		1388
777	/* use this function pointer to call the above function */	1389	return 1;
778	/* this is done to increase chances of the compiler not inlining the call */	1390	}
779	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
780		1391
781	#define SV_CORO(sv,func) \	1392	static int
782	do { \	1393	api_is_ready (SV *coro_sv)
783	if (SvROK (sv)) \	1394	{
784	sv = SvRV (sv); \	1395	dTHX;
785	\	1396	return !!(SvSTATE (coro_sv)->flags & CF_READY);
786	if (SvTYPE (sv) == SVt_PVHV) \	1397	}
787	{ \
788	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
789	\
790	if (!he) \
791	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
792	\
793	(sv) = SvRV (HeVAL(he)); \
794	} \
795	\
796	/* must also be changed inside Coro::Cont::yield */ \
797	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
798	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
799	\
800	} while(0)
801
802	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))
803		1398
804	static void	1399	static void
805	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1400	prepare_schedule (pTHX_ struct transfer_args *ta)
806	{	1401	{
807	SV_CORO (prev, "Coro::transfer");	1402	SV *prev_sv, *next_sv;
808	SV_CORO (next, "Coro::transfer");
809		1403
810	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1404	for (;;)
811	}	1405	{
		1406	LOCK;
		1407	next_sv = coro_deq (aTHX);
812		1408
813	/** Coro ********************************************************************/	1409	/* nothing to schedule: call the idle handler */
		1410	if (expect_false (!next_sv))
		1411	{
		1412	dSP;
		1413	UNLOCK;
814		1414
815	#define PRIO_MAX 3	1415	ENTER;
816	#define PRIO_HIGH 1	1416	SAVETMPS;
817	#define PRIO_NORMAL 0
818	#define PRIO_LOW -1
819	#define PRIO_IDLE -3
820	#define PRIO_MIN -4
821		1417
822	/* for Coro.pm */	1418	PUSHMARK (SP);
823	static GV *coro_current, *coro_idle;	1419	PUTBACK;
824	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	1420	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
825	static int coro_nready;	1421	SPAGAIN;
		1422
		1423	FREETMPS;
		1424	LEAVE;
		1425	continue;
		1426	}
		1427
		1428	ta->next = SvSTATE (next_sv);
		1429
		1430	/* cannot transfer to destroyed coros, skip and look for next */
		1431	if (expect_false (ta->next->flags & CF_DESTROYED))
		1432	{
		1433	UNLOCK;
		1434	SvREFCNT_dec (next_sv);
		1435	/* coro_nready is already taken care of by destroy */
		1436	continue;
		1437	}
		1438
		1439	--coro_nready;
		1440	UNLOCK;
		1441	break;
		1442	}
		1443
		1444	/* free this only after the transfer */
		1445	prev_sv = SvRV (coro_current);
		1446	ta->prev = SvSTATE (prev_sv);
		1447	TRANSFER_CHECK (*ta);
		1448	assert (ta->next->flags & CF_READY);
		1449	ta->next->flags &= ~CF_READY;
		1450	SvRV_set (coro_current, next_sv);
		1451
		1452	LOCK;
		1453	free_coro_mortal (aTHX);
		1454	coro_mortal = prev_sv;
		1455	UNLOCK;
		1456	}
826		1457
827	static void	1458	static void
828	coro_enq (pTHX_ SV *sv)	1459	prepare_cede (pTHX_ struct transfer_args *ta)
829	{	1460	{
830	SV **xprio;	1461	api_ready (coro_current);
831	int prio;	1462	prepare_schedule (aTHX_ ta);
		1463	}
832		1464
833	if (SvTYPE (sv) != SVt_PVHV)	1465	static int
834	croak ("Coro::ready tried to enqueue something that is not a coroutine");	1466	prepare_cede_notself (pTHX_ struct transfer_args *ta)
835		1467	{
836	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
837	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
838
839	prio = prio > PRIO_MAX ? PRIO_MAX
840	: prio < PRIO_MIN ? PRIO_MIN
841	: prio;
842
843	av_push (coro_ready [prio - PRIO_MIN], sv);
844	coro_nready++;	1468	if (coro_nready)
845	}
846
847	static SV *
848	coro_deq (pTHX_ int min_prio)
849	{
850	int prio = PRIO_MAX - PRIO_MIN;
851
852	min_prio -= PRIO_MIN;
853	if (min_prio < 0)
854	min_prio = 0;
855
856	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
857	if (AvFILLp (coro_ready [prio]) >= 0)
858	{	1469	{
859	coro_nready--;	1470	SV *prev = SvRV (coro_current);
860	return av_shift (coro_ready [prio]);	1471	prepare_schedule (aTHX_ ta);
		1472	api_ready (prev);
		1473	return 1;
861	}	1474	}
862		1475	else
863	return 0;	1476	return 0;
864	}
865
866	static void
867	api_ready (SV *coro)
868	{
869	dTHX;
870
871	if (SvROK (coro))
872	coro = SvRV (coro);
873
874	LOCK;
875	coro_enq (aTHX_ SvREFCNT_inc (coro));
876	UNLOCK;
877	}	1477	}
878		1478
879	static void	1479	static void
880	api_schedule (void)	1480	api_schedule (void)
881	{	1481	{
882	dTHX;	1482	dTHX;
		1483	struct transfer_args ta;
883		1484
884	SV *prev, *next;	1485	prepare_schedule (aTHX_ &ta);
		1486	TRANSFER (ta);
		1487	}
885		1488
886	LOCK;	1489	static int
		1490	api_cede (void)
		1491	{
		1492	dTHX;
		1493	struct transfer_args ta;
887		1494
888	prev = SvRV (GvSV (coro_current));	1495	prepare_cede (aTHX_ &ta);
889	next = coro_deq (aTHX_ PRIO_MIN);
890		1496
891	if (!next)	1497	if (expect_true (ta.prev != ta.next))
892	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1498	{
		1499	TRANSFER (ta);
		1500	return 1;
		1501	}
		1502	else
		1503	return 0;
		1504	}
893		1505
894	/* free this only after the transfer */	1506	static int
895	coro_mortal = prev;	1507	api_cede_notself (void)
896	SV_CORO (prev, "Coro::schedule");	1508	{
		1509	dTHX;
		1510	struct transfer_args ta;
897		1511
898	SvRV (GvSV (coro_current)) = next;	1512	if (prepare_cede_notself (aTHX_ &ta))
899		1513	{
900	SV_CORO (next, "Coro::schedule");	1514	TRANSFER (ta);
901		1515	return 1;
902	UNLOCK;	1516	}
903		1517	else
904	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1518	return 0;
905	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
906	}	1519	}
907		1520
908	static void	1521	static void
909	api_cede (void)	1522	api_trace (SV *coro_sv, int flags)
910	{	1523	{
911	dTHX;	1524	dTHX;
		1525	struct coro *coro = SvSTATE (coro_sv);
912		1526
913	LOCK;	1527	if (flags & CC_TRACE)
914	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1528	{
915	UNLOCK;	1529	if (!coro->cctx)
		1530	coro->cctx = cctx_new ();
		1531	else if (!(coro->cctx->flags & CC_TRACE))
		1532	croak ("cannot enable tracing on coroutine with custom stack");
916		1533
917	api_schedule ();	1534	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
918	}	1535	}
		1536	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1537	{
		1538	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
919		1539
		1540	if (coro->flags & CF_RUNNING)
		1541	PL_runops = RUNOPS_DEFAULT;
		1542	else
		1543	coro->slot->runops = RUNOPS_DEFAULT;
		1544	}
		1545	}
		1546
920	MODULE = Coro::State PACKAGE = Coro::State	1547	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
921		1548
922	PROTOTYPES: ENABLE	1549	PROTOTYPES: DISABLE
923		1550
924	BOOT:	1551	BOOT:
925	{ /* {} necessary for stoopid perl-5.6.x */	1552	{
926	#ifdef USE_ITHREADS	1553	#ifdef USE_ITHREADS
927	MUTEX_INIT (&coro_mutex);	1554	MUTEX_INIT (&coro_mutex);
928	#endif	1555	#endif
929	BOOT_PAGESIZE;	1556	BOOT_PAGESIZE;
930		1557
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1558	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1559	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1560
		1561	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1562	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1563	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1564	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1565
		1566	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1567	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1568	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1569
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1570	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		1571
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1572	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1573	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1574	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
939		1576
940	main_mainstack = PL_mainstack;	1577	main_mainstack = PL_mainstack;
		1578	main_top_env = PL_top_env;
		1579
		1580	while (main_top_env->je_prev)
		1581	main_top_env = main_top_env->je_prev;
941		1582
942	coroapi.ver = CORO_API_VERSION;	1583	coroapi.ver = CORO_API_VERSION;
		1584	coroapi.rev = CORO_API_REVISION;
943	coroapi.transfer = api_transfer;	1585	coroapi.transfer = api_transfer;
944	}
945		1586
946	Coro::State	1587	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
947	_newprocess(args)	1588	}
948	SV * args	1589
949	PROTOTYPE: $	1590	SV *
		1591	new (char *klass, ...)
950	CODE:	1592	CODE:
951	Coro__State coro;	1593	{
		1594	struct coro *coro;
		1595	MAGIC *mg;
		1596	HV *hv;
		1597	int i;
952		1598
953	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
954	croak ("Coro::State::_newprocess expects an arrayref");
955
956	Newz (0, coro, 1, struct coro);	1599	Newz (0, coro, 1, struct coro);
		1600	coro->args = newAV ();
		1601	coro->flags = CF_NEW;
957		1602
958	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1603	if (coro_first) coro_first->prev = coro;
959	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1604	coro->next = coro_first;
960	/*coro->stack = 0;*/	1605	coro_first = coro;
961		1606
962	RETVAL = coro;	1607	coro->hv = hv = newHV ();
		1608	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1609	mg->mg_flags |= MGf_DUP;
		1610	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1611
		1612	av_extend (coro->args, items - 1);
		1613	for (i = 1; i < items; i++)
		1614	av_push (coro->args, newSVsv (ST (i)));
		1615	}
963	OUTPUT:	1616	OUTPUT:
964	RETVAL	1617	RETVAL
965		1618
		1619	# these not obviously related functions are all rolled into the same xs
		1620	# function to increase chances that they all will call transfer with the same
		1621	# stack offset
966	void	1622	void
967	transfer(prev, next, flags)	1623	_set_stacklevel (...)
968	SV *prev	1624	ALIAS:
969	SV *next	1625	Coro::State::transfer = 1
970	int flags	1626	Coro::schedule = 2
971	PROTOTYPE: @	1627	Coro::cede = 3
		1628	Coro::cede_notself = 4
972	CODE:	1629	CODE:
		1630	{
		1631	struct transfer_args ta;
		1632
973	PUTBACK;	1633	PUTBACK;
974	SV_CORO (next, "Coro::transfer");	1634	switch (ix)
975	SV_CORO (prev, "Coro::transfer");	1635	{
976	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1636	case 0:
		1637	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1638	ta.next = 0;
		1639	break;
		1640
		1641	case 1:
		1642	if (items != 2)
		1643	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1644
		1645	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1646	break;
		1647
		1648	case 2:
		1649	prepare_schedule (aTHX_ &ta);
		1650	break;
		1651
		1652	case 3:
		1653	prepare_cede (aTHX_ &ta);
		1654	break;
		1655
		1656	case 4:
		1657	if (!prepare_cede_notself (aTHX_ &ta))
		1658	XSRETURN_EMPTY;
		1659
		1660	break;
		1661	}
977	SPAGAIN;	1662	SPAGAIN;
978		1663
		1664	BARRIER;
		1665	PUTBACK;
		1666	TRANSFER (ta);
		1667	SPAGAIN; /* might be the sp of a different coroutine now */
		1668	/* be extra careful not to ever do anything after TRANSFER */
		1669	}
		1670
		1671	bool
		1672	_destroy (SV *coro_sv)
		1673	CODE:
		1674	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1675	OUTPUT:
		1676	RETVAL
		1677
979	void	1678	void
980	DESTROY(coro)
981	Coro::State coro
982	CODE:
983
984	if (coro->mainstack && coro->mainstack != main_mainstack)
985	{
986	struct coro temp;
987
988	PUTBACK;
989	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
990	LOAD (aTHX_ coro);
991	SPAGAIN;
992
993	destroy_stacks (aTHX);
994
995	LOAD ((&temp)); /* this will get rid of defsv etc.. */
996	SPAGAIN;
997
998	coro->mainstack = 0;
999	}
1000
1001	deallocate_stack (coro);
1002	SvREFCNT_dec (coro->args);
1003	Safefree (coro);
1004
1005	void
1006	_exit(code)	1679	_exit (code)
1007	int code	1680	int code
1008	PROTOTYPE: $	1681	PROTOTYPE: $
1009	CODE:	1682	CODE:
1010	_exit (code);	1683	_exit (code);
1011		1684
1012	MODULE = Coro::State PACKAGE = Coro::Cont	1685	int
		1686	cctx_stacksize (int new_stacksize = 0)
		1687	CODE:
		1688	RETVAL = coro_stacksize;
		1689	if (new_stacksize)
		1690	coro_stacksize = new_stacksize;
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	int
		1695	cctx_count ()
		1696	CODE:
		1697	RETVAL = cctx_count;
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	int
		1702	cctx_idle ()
		1703	CODE:
		1704	RETVAL = cctx_idle;
		1705	OUTPUT:
		1706	RETVAL
1013		1707
1014	void	1708	void
1015	yield(...)	1709	list ()
1016	PROTOTYPE: @	1710	PPCODE:
		1711	{
		1712	struct coro *coro;
		1713	for (coro = coro_first; coro; coro = coro->next)
		1714	if (coro->hv)
		1715	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1716	}
		1717
		1718	void
		1719	call (Coro::State coro, SV *coderef)
		1720	ALIAS:
		1721	eval = 1
		1722	CODE:
		1723	{
		1724	if (coro->mainstack)
		1725	{
		1726	struct coro temp;
		1727
		1728	if (!(coro->flags & CF_RUNNING))
		1729	{
		1730	PUTBACK;
		1731	save_perl (aTHX_ &temp);
		1732	load_perl (aTHX_ coro);
		1733	}
		1734
		1735	{
		1736	dSP;
		1737	ENTER;
		1738	SAVETMPS;
		1739	PUTBACK;
		1740	PUSHSTACK;
		1741	PUSHMARK (SP);
		1742
		1743	if (ix)
		1744	eval_sv (coderef, 0);
		1745	else
		1746	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1747
		1748	POPSTACK;
		1749	SPAGAIN;
		1750	FREETMPS;
		1751	LEAVE;
		1752	PUTBACK;
		1753	}
		1754
		1755	if (!(coro->flags & CF_RUNNING))
		1756	{
		1757	save_perl (aTHX_ coro);
		1758	load_perl (aTHX_ &temp);
		1759	SPAGAIN;
		1760	}
		1761	}
		1762	}
		1763
		1764	SV *
		1765	is_ready (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	is_ready = CF_READY
		1769	is_running = CF_RUNNING
		1770	is_new = CF_NEW
		1771	is_destroyed = CF_DESTROYED
		1772	CODE:
		1773	RETVAL = boolSV (coro->flags & ix);
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	void
		1778	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1779
		1780	SV *
		1781	has_stack (Coro::State coro)
		1782	PROTOTYPE: $
		1783	CODE:
		1784	RETVAL = boolSV (!!coro->cctx);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	int
		1789	is_traced (Coro::State coro)
		1790	PROTOTYPE: $
		1791	CODE:
		1792	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1793	OUTPUT:
		1794	RETVAL
		1795
		1796	IV
		1797	rss (Coro::State coro)
		1798	PROTOTYPE: $
		1799	ALIAS:
		1800	usecount = 1
1017	CODE:	1801	CODE:
1018	SV *yieldstack;	1802	switch (ix)
1019	SV *sv;	1803	{
1020	AV *defav = GvAV (PL_defgv);	1804	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1021	struct coro *prev, *next;	1805	case 1: RETVAL = coro->usecount; break;
1022
1023	yieldstack = *hv_fetch (
1024	(HV *)SvRV (GvSV (coro_current)),
1025	"yieldstack", sizeof ("yieldstack") - 1,
1026	0	1806	}
1027	);	1807	OUTPUT:
		1808	RETVAL
1028		1809
1029	/* set up @_ -- ugly */
1030	av_clear (defav);
1031	av_fill (defav, items - 1);
1032	while (items--)
1033	av_store (defav, items, SvREFCNT_inc (ST(items)));
1034
1035	sv = av_pop ((AV *)SvRV (yieldstack));
1036	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1037	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1038	SvREFCNT_dec (sv);
1039
1040	coro_state_transfer (aTHX_ prev, next, 0);
1041		1810
1042	MODULE = Coro::State PACKAGE = Coro	1811	MODULE = Coro::State PACKAGE = Coro
1043		1812
1044	BOOT:	1813	BOOT:
1045	{	1814	{
1046	int i;	1815	int i;
		1816
		1817	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1818	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1819	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1820
		1821	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1822	SvREADONLY_on (coro_current);
		1823
1047	HV *stash = gv_stashpv ("Coro", TRUE);	1824	coro_stash = gv_stashpv ("Coro", TRUE);
1048		1825
1049	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1826	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1050	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1827	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1051	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1828	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1052	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1829	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1053	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1830	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1054	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1831	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1055
1056	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1057	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1058		1832
1059	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1833	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1060	coro_ready[i] = newAV ();	1834	coro_ready[i] = newAV ();
1061		1835
1062	{	1836	{
1063	SV *sv = perl_get_sv("Coro::API", 1);	1837	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1838	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1064		1839
1065	coroapi.schedule = api_schedule;	1840	coroapi.schedule = api_schedule;
1066	coroapi.cede = api_cede;	1841	coroapi.cede = api_cede;
		1842	coroapi.cede_notself = api_cede_notself;
1067	coroapi.ready = api_ready;	1843	coroapi.ready = api_ready;
		1844	coroapi.is_ready = api_is_ready;
1068	coroapi.nready = &coro_nready;	1845	coroapi.nready = &coro_nready;
1069	coroapi.current = coro_current;	1846	coroapi.current = coro_current;
1070		1847
1071	GCoroAPI = &coroapi;	1848	GCoroAPI = &coroapi;
1072	sv_setiv (sv, (IV)&coroapi);	1849	sv_setiv (sv, (IV)&coroapi);
1073	SvREADONLY_on (sv);	1850	SvREADONLY_on (sv);
1074	}	1851	}
1075	}	1852	}
1076		1853
1077	#if !PERL_MICRO
1078
1079	void	1854	void
1080	ready(self)	1855	_set_current (SV *current)
1081	SV * self
1082	PROTOTYPE: $	1856	PROTOTYPE: $
1083	CODE:	1857	CODE:
1084	api_ready (self);	1858	SvREFCNT_dec (SvRV (coro_current));
1085		1859	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1086	#endif
1087		1860
1088	int	1861	int
		1862	prio (Coro::State coro, int newprio = 0)
		1863	ALIAS:
		1864	nice = 1
		1865	CODE:
		1866	{
		1867	RETVAL = coro->prio;
		1868
		1869	if (items > 1)
		1870	{
		1871	if (ix)
		1872	newprio = coro->prio - newprio;
		1873
		1874	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1875	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1876
		1877	coro->prio = newprio;
		1878	}
		1879	}
		1880	OUTPUT:
		1881	RETVAL
		1882
		1883	SV *
		1884	ready (SV *self)
		1885	PROTOTYPE: $
		1886	CODE:
		1887	RETVAL = boolSV (api_ready (self));
		1888	OUTPUT:
		1889	RETVAL
		1890
		1891	int
1089	nready(...)	1892	nready (...)
1090	PROTOTYPE:	1893	PROTOTYPE:
1091	CODE:	1894	CODE:
1092	RETVAL = coro_nready;	1895	RETVAL = coro_nready;
1093	OUTPUT:	1896	OUTPUT:
1094	RETVAL	1897	RETVAL
1095		1898
1096	void	1899	void
1097	schedule(...)	1900	throw (Coro::State self, SV *throw = &PL_sv_undef)
1098	PROTOTYPE:	1901	PROTOTYPE: $;$
		1902	CODE:
		1903	SvREFCNT_dec (self->throw);
		1904	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1905
		1906	# for async_pool speedup
		1907	void
		1908	_pool_1 (SV *cb)
1099	CODE:	1909	CODE:
1100	api_schedule ();	1910	{
		1911	struct coro *coro = SvSTATE (coro_current);
		1912	HV *hv = (HV *)SvRV (coro_current);
		1913	AV *defav = GvAV (PL_defgv);
		1914	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1915	AV *invoke_av;
		1916	int i, len;
		1917
		1918	if (!invoke)
		1919	{
		1920	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1921	croak ("\3async_pool terminate\2\n");
		1922	}
		1923
		1924	SvREFCNT_dec (coro->saved_deffh);
		1925	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1926
		1927	hv_store (hv, "desc", sizeof ("desc") - 1,
		1928	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1929
		1930	invoke_av = (AV *)SvRV (invoke);
		1931	len = av_len (invoke_av);
		1932
		1933	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1934
		1935	if (len > 0)
		1936	{
		1937	av_fill (defav, len - 1);
		1938	for (i = 0; i < len; ++i)
		1939	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1940	}
		1941
		1942	SvREFCNT_dec (invoke);
		1943	}
1101		1944
1102	void	1945	void
1103	cede(...)	1946	_pool_2 (SV *cb)
1104	PROTOTYPE:
1105	CODE:	1947	CODE:
1106	api_cede ();	1948	{
		1949	struct coro *coro = SvSTATE (coro_current);
1107		1950
1108	# and these are hacks	1951	sv_setsv (cb, &PL_sv_undef);
		1952
		1953	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1954	coro->saved_deffh = 0;
		1955
		1956	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1957	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1958	{
		1959	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1960	croak ("\3async_pool terminate\2\n");
		1961	}
		1962
		1963	av_clear (GvAV (PL_defgv));
		1964	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1965	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1966
		1967	coro->prio = 0;
		1968
		1969	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1970	api_trace (coro_current, 0);
		1971
		1972	av_push (av_async_pool, newSVsv (coro_current));
		1973	}
		1974
		1975
		1976	MODULE = Coro::State PACKAGE = Coro::AIO
		1977
1109	SV *	1978	SV *
1110	_aio_get_state ()	1979	_get_state ()
1111	CODE:	1980	CODE:
1112	{	1981	{
1113	struct {	1982	struct io_state *data;
1114	int errorno;
1115	int laststype;
1116	int laststatval;
1117	Stat_t statcache;
1118	} data;
1119		1983
		1984	RETVAL = newSV (sizeof (struct io_state));
		1985	data = (struct io_state *)SvPVX (RETVAL);
		1986	SvCUR_set (RETVAL, sizeof (struct io_state));
		1987	SvPOK_only (RETVAL);
		1988
1120	data.errorno = errno;	1989	data->errorno = errno;
1121	data.laststype = PL_laststype;	1990	data->laststype = PL_laststype;
1122	data.laststatval = PL_laststatval;	1991	data->laststatval = PL_laststatval;
1123	data.statcache = PL_statcache;	1992	data->statcache = PL_statcache;
1124
1125	RETVAL = newSVpvn ((char *)&data, sizeof data);
1126	}	1993	}
1127	OUTPUT:	1994	OUTPUT:
1128	RETVAL	1995	RETVAL
1129		1996
1130	void	1997	void
1131	_aio_set_state (char *data_)	1998	_set_state (char *data_)
1132	PROTOTYPE: $	1999	PROTOTYPE: $
1133	CODE:	2000	CODE:
1134	{	2001	{
1135	struct {	2002	struct io_state *data = (void *)data_;
1136	int errorno;
1137	int laststype;
1138	int laststatval;
1139	Stat_t statcache;
1140	} *data = (void *)data_;
1141		2003
1142	errno = data->errorno;	2004	errno = data->errorno;
1143	PL_laststype = data->laststype;	2005	PL_laststype = data->laststype;
1144	PL_laststatval = data->laststatval;	2006	PL_laststatval = data->laststatval;
1145	PL_statcache = data->statcache;	2007	PL_statcache = data->statcache;
1146	}	2008	}
		2009

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