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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs.
Revision 1.213 by root, Thu Oct 11 00:40:48 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 <errno.h>	77	/* 5.8.7 */
		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
33		89
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	91	# 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	92	#endif
52	# include <limits.h>	93
53	# ifndef PAGESIZE	94	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	95	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	96	#endif
60	#endif
61		97
62	#define SUB_INIT "Coro::State::initialize"	98	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
64		102
65	/* The next macro should declare a variable stacklevel that contains and approximation	103	/* The next macros try to return the current stack pointer, in an as
66	* to the current C stack pointer. Its property is that it changes with each call	104	* portable way as possible. */
67	* and should be unique. */	105	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	106	#define STACKLEVEL ((void *)&stacklevel)
69		107
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		109
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	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))
73		124
74	#include "CoroAPI.h"	125	#include "CoroAPI.h"
75		126
76	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
…		…
80	#else	131	#else
81	# define LOCK (void)0	132	# define LOCK (void)0
82	# define UNLOCK (void)0	133	# define UNLOCK (void)0
83	#endif	134	#endif
84		135
		136	/* helper storage struct for Coro::AIO */
		137	struct io_state
		138	{
		139	int errorno;
		140	I32 laststype;
		141	int laststatval;
		142	Stat_t statcache;
		143	};
		144
		145	static size_t coro_stacksize = CORO_STACKSIZE;
85	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	147	static AV *main_mainstack; /* used to differentiate between $main and others */
		148	static JMPENV *main_top_env;
87	static HV *coro_state_stash;	149	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 */	150	static SV *coro_mortal; /* will be freed after next transfer */
91		151
92	/* this is actually not only the c stack but also c registers etc... */	152	static GV *irsgv; /* $/ */
		153	static GV *stdoutgv; /* *STDOUT */
		154
		155	static HV *hv_sig; /* %SIG */
		156	static SV *sv_diehook;
		157	static SV *sv_warnhook;
		158
		159	/* async_pool helper stuff */
		160	static SV *sv_pool_rss;
		161	static SV *sv_pool_size;
		162	static AV *av_async_pool;
		163
		164	static struct coro_cctx *cctx_first;
		165	static int cctx_count, cctx_idle;
		166
		167	enum {
		168	CC_MAPPED = 0x01,
		169	CC_NOREUSE = 0x02, /* throw this away after tracing */
		170	CC_TRACE = 0x04,
		171	CC_TRACE_SUB = 0x08, /* trace sub calls */
		172	CC_TRACE_LINE = 0x10, /* trace each statement */
		173	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		174	};
		175
		176	/* this is a structure representing a c-level coroutine */
		177	typedef struct coro_cctx {
		178	struct coro_cctx *next;
		179
		180	/* the stack */
		181	void *sptr;
		182	size_t ssize;
		183
		184	/* cpu state */
		185	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		186	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		187	JMPENV *top_env;
		188	coro_context cctx;
		189
		190	#if CORO_USE_VALGRIND
		191	int valgrind_id;
		192	#endif
		193	unsigned char flags;
		194	} coro_cctx;
		195
		196	enum {
		197	CF_RUNNING = 0x0001, /* coroutine is running */
		198	CF_READY = 0x0002, /* coroutine is ready */
		199	CF_NEW = 0x0004, /* has never been switched to */
		200	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		201	};
		202
		203	/* the structure where most of the perl state is stored, overlaid on the cxstack */
93	typedef struct {	204	typedef struct {
94	int refcnt; /* pointer reference counter */	205	SV *defsv;
95	int usecnt; /* shared by how many coroutines */	206	AV *defav;
96	int gencnt; /* generation counter */	207	SV *errsv;
		208	SV *irsgv;
		209	#define VAR(name,type) type name;
		210	# include "state.h"
		211	#undef VAR
		212	} perl_slots;
97		213
98	coro_context cctx;	214	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99		215
100	void *sptr;	216	/* this is a structure representing a perl-level coroutine */
101	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103
104	struct coro {	217	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	218	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	219	coro_cctx *cctx;
107		220
108	/* the optional C context */	221	/* process data */
109	coro_stack *stack;
110	void *cursp;
111	int gencnt;
112
113	/* optionally saved, might be zero */
114	AV *defav;
115	SV *defsv;
116	SV *errsv;
117
118	/* saved global state not related to stacks */
119	U8 dowarn;
120	I32 in_eval;
121
122	/* the stacks and related info (callchain etc..) */
123	PERL_SI *curstackinfo;
124	AV *curstack;
125	AV *mainstack;	222	AV *mainstack;
126	SV **stack_sp;	223	perl_slots *slot; /* basically the saved sp */
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152		224
153	/* data associated with this coroutine (initial args) */	225	AV *args; /* data associated with this coroutine (initial args) */
154	AV *args;	226	int refcnt; /* coroutines are refcounted, yes */
		227	int flags; /* CF_ flags */
		228	HV *hv; /* the perl hash associated with this coro, if any */
		229
		230	/* statistics */
		231	int usecount; /* number of transfers to this coro */
		232
		233	/* coro process data */
		234	int prio;
		235	SV *throw; /* exception to be thrown */
		236
		237	/* async_pool */
		238	SV *saved_deffh;
		239
		240	/* linked list */
		241	struct coro *next, *prev;
155	};	242	};
156		243
157	typedef struct coro *Coro__State;	244	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	245	typedef struct coro *Coro__State_or_hashref;
159		246
		247	/** Coro ********************************************************************/
		248
		249	#define PRIO_MAX 3
		250	#define PRIO_HIGH 1
		251	#define PRIO_NORMAL 0
		252	#define PRIO_LOW -1
		253	#define PRIO_IDLE -3
		254	#define PRIO_MIN -4
		255
		256	/* for Coro.pm */
		257	static SV *coro_current;
		258	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		259	static int coro_nready;
		260	static struct coro *coro_first;
		261
		262	/** lowlevel stuff **********************************************************/
		263
		264	static SV *
		265	coro_get_sv (pTHX_ const char *name, int create)
		266	{
		267	#if PERL_VERSION_ATLEAST (5,9,0)
		268	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		269	get_sv (name, create);
		270	#endif
		271	return get_sv (name, create);
		272	}
		273
		274	static AV *
		275	coro_get_av (pTHX_ const char *name, int create)
		276	{
		277	#if PERL_VERSION_ATLEAST (5,9,0)
		278	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		279	get_av (name, create);
		280	#endif
		281	return get_av (name, create);
		282	}
		283
		284	static HV *
		285	coro_get_hv (pTHX_ const char *name, int create)
		286	{
		287	#if PERL_VERSION_ATLEAST (5,9,0)
		288	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		289	get_hv (name, create);
		290	#endif
		291	return get_hv (name, create);
		292	}
		293
160	static AV *	294	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	295	coro_clone_padlist (pTHX_ CV *cv)
162	{	296	{
163	AV *padlist = CvPADLIST (cv);	297	AV *padlist = CvPADLIST (cv);
164	AV *newpadlist, *newpad;	298	AV *newpadlist, *newpad;
165		299
166	newpadlist = newAV ();	300	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	301	AvREAL_off (newpadlist);
		302	#if PERL_VERSION_ATLEAST (5,9,0)
		303	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		304	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		306	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	307	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	308	--AvFILLp (padlist);
171		309
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	310	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
173	av_store (newpadlist, 1, (SV *)newpad);	311	av_store (newpadlist, 1, (SV *)newpad);
…		…
216		354
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	355	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		356
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	357	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		358
		359	#define CORO_MAGIC(cv) \
		360	SvMAGIC (cv) \
		361	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		362	? SvMAGIC (cv) \
		363	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		364	: 0
		365
		366	static struct coro *
		367	SvSTATE_ (pTHX_ SV *coro)
		368	{
		369	HV *stash;
		370	MAGIC *mg;
		371
		372	if (SvROK (coro))
		373	coro = SvRV (coro);
		374
		375	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		376	croak ("Coro::State object required");
		377
		378	stash = SvSTASH (coro);
		379	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		380	{
		381	/* very slow, but rare, check */
		382	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		383	croak ("Coro::State object required");
		384	}
		385
		386	mg = CORO_MAGIC (coro);
		387	return (struct coro *)mg->mg_ptr;
		388	}
		389
		390	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		391
221	/* the next two functions merely cache the padlists */	392	/* the next two functions merely cache the padlists */
222	static void	393	static void
223	get_padlist (pTHX_ CV *cv)	394	get_padlist (pTHX_ CV *cv)
224	{	395	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	396	MAGIC *mg = CORO_MAGIC (cv);
		397	AV *av;
226		398
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	399	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	400	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	401	else
230	{	402	{
231	#if 0	403	#if CORO_PREFER_PERL_FUNCTIONS
232	/* this should work - but it doesn't :( */	404	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (aTHX_ cv);	405	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	406	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	407	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	408	SvREFCNT_dec (cp);
237	#else	409	#else
238	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	410	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
241	}	413	}
242		414
243	static void	415	static void
244	put_padlist (pTHX_ CV *cv)	416	put_padlist (pTHX_ CV *cv)
245	{	417	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	418	MAGIC *mg = CORO_MAGIC (cv);
		419	AV *av;
247		420
248	if (!mg)	421	if (expect_false (!mg))
249	{	422	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	423	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	424	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	425	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	426	mg->mg_obj = (SV *)newAV ();
254	}	427	}
255		428
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	429	av = (AV *)mg->mg_obj;
257	}
258		430
259	#define SB do {	431	if (expect_false (AvFILLp (av) >= AvMAX (av)))
260	#define SE } while (0)	432	av_extend (av, AvMAX (av) + 1);
261		433
262	#define LOAD(state) load_state(aTHX_ (state));	434	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	435	}
264		436
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	437	/** load & save, init *******************************************************/
266		438
267	static void	439	static void
268	load_state(pTHX_ Coro__State c)	440	load_perl (pTHX_ Coro__State c)
269	{	441	{
270	PL_dowarn = c->dowarn;	442	perl_slots *slot = c->slot;
271	PL_in_eval = c->in_eval;	443	c->slot = 0;
272		444
273	PL_curstackinfo = c->curstackinfo;
274	PL_curstack = c->curstack;
275	PL_mainstack = c->mainstack;	445	PL_mainstack = c->mainstack;
276	PL_stack_sp = c->stack_sp;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303	PL_top_env = c->top_env;
304		446
305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	447	GvSV (PL_defgv) = slot->defsv;
306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	448	GvAV (PL_defgv) = slot->defav;
307	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	449	GvSV (PL_errgv) = slot->errsv;
		450	GvSV (irsgv) = slot->irsgv;
		451
		452	#define VAR(name,type) PL_ ## name = slot->name;
		453	# include "state.h"
		454	#undef VAR
		455
		456	/*hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);*/
		457	/*hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);*/
308		458
309	{	459	{
310	dSP;	460	dSP;
		461
311	CV *cv;	462	CV *cv;
312		463
313	/* now do the ugly restore mess */	464	/* now do the ugly restore mess */
314	while ((cv = (CV *)POPs))	465	while (expect_true (cv = (CV *)POPs))
315	{	466	{
316	AV *padlist = (AV *)POPs;
317
318	if (padlist)
319	{
320	put_padlist (aTHX_ cv); /* mark this padlist as available */	467	put_padlist (aTHX_ cv); /* mark this padlist as available */
321	CvPADLIST(cv) = padlist;	468	CvDEPTH (cv) = PTR2IV (POPs);
322	}	469	CvPADLIST (cv) = (AV *)POPs;
323
324	++CvDEPTH(cv);
325	}	470	}
326		471
327	PUTBACK;	472	PUTBACK;
328	}	473	}
329	}	474	}
330		475
331	static void	476	static void
332	save_state(pTHX_ Coro__State c, int flags)	477	save_perl (pTHX_ Coro__State c)
333	{	478	{
334	{	479	{
335	dSP;	480	dSP;
336	I32 cxix = cxstack_ix;	481	I32 cxix = cxstack_ix;
337	PERL_CONTEXT *ccstk = cxstack;	482	PERL_CONTEXT *ccstk = cxstack;
…		…
340	/*	485	/*
341	* the worst thing you can imagine happens first - we have to save	486	* the worst thing you can imagine happens first - we have to save
342	* (and reinitialize) all cv's in the whole callchain :(	487	* (and reinitialize) all cv's in the whole callchain :(
343	*/	488	*/
344		489
345	PUSHs (Nullsv);	490	XPUSHs (Nullsv);
346	/* this loop was inspired by pp_caller */	491	/* this loop was inspired by pp_caller */
347	for (;;)	492	for (;;)
348	{	493	{
349	while (cxix >= 0)	494	while (expect_true (cxix >= 0))
350	{	495	{
351	PERL_CONTEXT *cx = &ccstk[cxix--];	496	PERL_CONTEXT *cx = &ccstk[cxix--];
352		497
353	if (CxTYPE(cx) == CXt_SUB)	498	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
354	{	499	{
355	CV *cv = cx->blk_sub.cv;	500	CV *cv = cx->blk_sub.cv;
		501
356	if (CvDEPTH(cv))	502	if (expect_true (CvDEPTH (cv)))
357	{	503	{
358	EXTEND (SP, CvDEPTH(cv)*2);	504	EXTEND (SP, 3);
359
360	while (--CvDEPTH(cv))
361	{
362	/* this tells the restore code to increment CvDEPTH */
363	PUSHs (Nullsv);
364	PUSHs ((SV *)cv);
365	}
366
367	PUSHs ((SV *)CvPADLIST(cv));	505	PUSHs ((SV *)CvPADLIST (cv));
		506	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
368	PUSHs ((SV *)cv);	507	PUSHs ((SV *)cv);
369		508
		509	CvDEPTH (cv) = 0;
370	get_padlist (aTHX_ cv);	510	get_padlist (aTHX_ cv);
371	}	511	}
372	}	512	}
373	#ifdef CXt_FORMAT
374	else if (CxTYPE(cx) == CXt_FORMAT)
375	{
376	/* I never used formats, so how should I know how these are implemented? */
377	/* my bold guess is as a simple, plain sub... */
378	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379	}
380	#endif
381	}	513	}
382		514
383	if (top_si->si_type == PERLSI_MAIN)	515	if (expect_true (top_si->si_type == PERLSI_MAIN))
384	break;	516	break;
385		517
386	top_si = top_si->si_prev;	518	top_si = top_si->si_prev;
387	ccstk = top_si->si_cxstack;	519	ccstk = top_si->si_cxstack;
388	cxix = top_si->si_cxix;	520	cxix = top_si->si_cxix;
389	}	521	}
390		522
391	PUTBACK;	523	PUTBACK;
392	}	524	}
393		525
394	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	526	/* allocate some space on the context stack for our purposes */
395	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	527	/* we manually unroll here, as usually 2 slots is enough */
396	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	528	if (SLOT_COUNT >= 1) CXINC;
		529	if (SLOT_COUNT >= 2) CXINC;
		530	if (SLOT_COUNT >= 3) CXINC;
		531	{
		532	int i;
		533	for (i = 3; i < SLOT_COUNT; ++i)
		534	CXINC;
		535	}
		536	cxstack_ix -= SLOT_COUNT; /* undo allocation */
397		537
398	c->dowarn = PL_dowarn;
399	c->in_eval = PL_in_eval;
400
401	c->curstackinfo = PL_curstackinfo;
402	c->curstack = PL_curstack;
403	c->mainstack = PL_mainstack;	538	c->mainstack = PL_mainstack;
404	c->stack_sp = PL_stack_sp;	539
405	c->op = PL_op;	540	{
406	c->curpad = PL_curpad;	541	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
407	c->comppad = PL_comppad;	542
408	c->compcv = PL_compcv;	543	slot->defav = GvAV (PL_defgv);
409	c->stack_base = PL_stack_base;	544	slot->defsv = DEFSV;
410	c->stack_max = PL_stack_max;	545	slot->errsv = ERRSV;
411	c->tmps_stack = PL_tmps_stack;	546	slot->irsgv = GvSV (irsgv);
412	c->tmps_floor = PL_tmps_floor;	547
413	c->tmps_ix = PL_tmps_ix;	548	#define VAR(name,type) slot->name = PL_ ## name;
414	c->tmps_max = PL_tmps_max;	549	# include "state.h"
415	c->markstack = PL_markstack;	550	#undef VAR
416	c->markstack_ptr = PL_markstack_ptr;	551	}
417	c->markstack_max = PL_markstack_max;
418	c->scopestack = PL_scopestack;
419	c->scopestack_ix = PL_scopestack_ix;
420	c->scopestack_max = PL_scopestack_max;
421	c->savestack = PL_savestack;
422	c->savestack_ix = PL_savestack_ix;
423	c->savestack_max = PL_savestack_max;
424	#if PERL_VERSION < 9
425	c->retstack = PL_retstack;
426	c->retstack_ix = PL_retstack_ix;
427	c->retstack_max = PL_retstack_max;
428	#endif
429	c->curpm = PL_curpm;
430	c->curcop = PL_curcop;
431	c->top_env = PL_top_env;
432	}	552	}
433		553
434	/*	554	/*
435	* allocate various perl stacks. This is an exact copy	555	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	556	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	557	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	558	* not usually need a lot of stackspace.
439	*/	559	*/
		560	#if CORO_PREFER_PERL_FUNCTIONS
		561	# define coro_init_stacks init_stacks
		562	#else
440	static void	563	static void
441	coro_init_stacks (pTHX)	564	coro_init_stacks (pTHX)
442	{	565	{
443	LOCK;	566	PL_curstackinfo = new_stackinfo(32, 8);
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446	PL_curstackinfo->si_type = PERLSI_MAIN;	567	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	568	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	569	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		570
450	PL_stack_base = AvARRAY(PL_curstack);	571	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	572	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	573	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		574
454	New(50,PL_tmps_stack,96,SV*);	575	New(50,PL_tmps_stack,32,SV*);
455	PL_tmps_floor = -1;	576	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	577	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	578	PL_tmps_max = 32;
458		579
459	New(54,PL_markstack,16,I32);	580	New(54,PL_markstack,16,I32);
460	PL_markstack_ptr = PL_markstack;	581	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	582	PL_markstack_max = PL_markstack + 16;
462		583
463	#ifdef SET_MARK_OFFSET	584	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	585	SET_MARK_OFFSET;
465	#endif	586	#endif
466		587
467	New(54,PL_scopestack,16,I32);	588	New(54,PL_scopestack,8,I32);
468	PL_scopestack_ix = 0;	589	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	590	PL_scopestack_max = 8;
470		591
471	New(54,PL_savestack,96,ANY);	592	New(54,PL_savestack,24,ANY);
472	PL_savestack_ix = 0;	593	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	594	PL_savestack_max = 24;
474		595
475	#if PERL_VERSION < 9	596	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	597	New(54,PL_retstack,4,OP*);
477	PL_retstack_ix = 0;	598	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	599	PL_retstack_max = 4;
479	#endif	600	#endif
480
481	UNLOCK;
482	}	601	}
		602	#endif
483		603
484	/*	604	/*
485	* destroy the stacks, the callchain etc...	605	* destroy the stacks, the callchain etc...
486	*/	606	*/
487	static void	607	static void
488	destroy_stacks(pTHX)	608	coro_destroy_stacks (pTHX)
489	{	609	{
490	if (!IN_DESTRUCT)
491	{
492	/* is this ugly, I ask? */
493	LEAVE_SCOPE (0);
494
495	/* sure it is, but more important: is it correct?? :/ */
496	FREETMPS;
497
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499	}
500
501	while (PL_curstackinfo->si_next)	610	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	611	PL_curstackinfo = PL_curstackinfo->si_next;
503		612
504	while (PL_curstackinfo)	613	while (PL_curstackinfo)
505	{	614	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	615	PERL_SI *p = PL_curstackinfo->si_prev;
507		616
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	617	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	618	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		619
520	Safefree (PL_curstackinfo->si_cxstack);	620	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	621	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	622	PL_curstackinfo = p;
523	}	623	}
524		624
525	Safefree (PL_tmps_stack);	625	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	626	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	627	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	628	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	629	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	630	Safefree (PL_retstack);
531	#endif	631	#endif
532	}	632	}
533		633
534	static void	634	static size_t
535	allocate_stack (Coro__State ctx, int alloc)	635	coro_rss (pTHX_ struct coro *coro)
536	{	636	{
537	coro_stack *stack;	637	size_t rss = sizeof (*coro);
538		638
539	New (0, stack, 1, coro_stack);	639	if (coro->mainstack)
540
541	stack->refcnt = 1;
542	stack->usecnt = 1;
543	stack->gencnt = ctx->gencnt = 0;
544
545	if (alloc)
546	{	640	{
547	#if HAVE_MMAP	641	perl_slots tmp_slot;
548	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	642	perl_slots *slot;
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	643
550	if (stack->sptr != (void *)-1)	644	if (coro->flags & CF_RUNNING)
551	{	645	{
552	# if STACKGUARD	646	slot = &tmp_slot;
553	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	647
554	# endif	648	#define VAR(name,type) slot->name = PL_ ## name;
		649	# include "state.h"
		650	#undef VAR
555	}	651	}
556	else	652	else
557	#endif	653	slot = coro->slot;
558	{
559	stack->ssize = - (STACKSIZE * (long)sizeof (long));
560	New (0, stack->sptr, STACKSIZE, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565		654
566	ctx->stack = stack;	655	rss += sizeof (slot->curstackinfo);
567	}	656	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		657	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		658	rss += slot->tmps_max * sizeof (SV *);
		659	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		660	rss += slot->scopestack_max * sizeof (I32);
		661	rss += slot->savestack_max * sizeof (ANY);
568		662
569	static void	663	#if !PERL_VERSION_ATLEAST (5,9,0)
570	deallocate_stack (Coro__State ctx)	664	rss += slot->retstack_max * sizeof (OP *);
571	{	665	#endif
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{	666	}
578	if (!--stack->refcnt)
579	{
580	#ifdef HAVE_MMAP
581	if (stack->ssize > 0 && stack->sptr)
582	munmap (stack->sptr, stack->ssize);
583	else
584	#endif
585	Safefree (stack->sptr);
586		667
587	Safefree (stack);	668	return rss;
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}	669	}
593		670
		671	/** coroutine stack handling ************************************************/
		672
594	static void	673	static void
595	setup_coro (void *arg)	674	coro_setup (pTHX_ struct coro *coro)
596	{	675	{
597	/*	676	/*
598	* emulate part of the perl startup here.	677	* emulate part of the perl startup here.
599	*/	678	*/
		679	coro_init_stacks (aTHX);
		680
		681	PL_runops = RUNOPS_DEFAULT;
		682	PL_curcop = &PL_compiling;
		683	PL_in_eval = EVAL_NULL;
		684	PL_comppad = 0;
		685	PL_curpm = 0;
		686	PL_curpad = 0;
		687	PL_localizing = 0;
		688	PL_dirty = 0;
		689	PL_restartop = 0;
		690	PL_diehook = 0; hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);
		691	PL_warnhook = 0; hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);
		692
		693	GvSV (PL_defgv) = newSV (0);
		694	GvAV (PL_defgv) = coro->args; coro->args = 0;
		695	GvSV (PL_errgv) = newSV (0);
		696	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		697	PL_rs = newSVsv (GvSV (irsgv));
		698	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		699
		700	{
		701	dSP;
		702	LOGOP myop;
		703
		704	Zero (&myop, 1, LOGOP);
		705	myop.op_next = Nullop;
		706	myop.op_flags = OPf_WANT_VOID;
		707
		708	PUSHMARK (SP);
		709	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		710	PUTBACK;
		711	PL_op = (OP *)&myop;
		712	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		713	SPAGAIN;
		714	}
		715
		716	/* this newly created coroutine might be run on an existing cctx which most
		717	* likely was suspended in set_stacklevel, called from entersub.
		718	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		719	* so we ENTER here for symmetry
		720	*/
		721	ENTER;
		722	}
		723
		724	static void
		725	coro_destroy (pTHX_ struct coro *coro)
		726	{
		727	if (!IN_DESTRUCT)
		728	{
		729	/* restore all saved variables and stuff */
		730	LEAVE_SCOPE (0);
		731	assert (PL_tmps_floor == -1);
		732
		733	/* free all temporaries */
		734	FREETMPS;
		735	assert (PL_tmps_ix == -1);
		736
		737	/* unwind all extra stacks */
		738	POPSTACK_TO (PL_mainstack);
		739
		740	/* unwind main stack */
		741	dounwind (-1);
		742	}
		743
		744	SvREFCNT_dec (GvSV (PL_defgv));
		745	SvREFCNT_dec (GvAV (PL_defgv));
		746	SvREFCNT_dec (GvSV (PL_errgv));
		747	SvREFCNT_dec (PL_defoutgv);
		748	SvREFCNT_dec (PL_rs);
		749	SvREFCNT_dec (GvSV (irsgv));
		750
		751	SvREFCNT_dec (PL_diehook);
		752	SvREFCNT_dec (PL_warnhook);
		753
		754	SvREFCNT_dec (coro->saved_deffh);
		755	SvREFCNT_dec (coro->throw);
		756
		757	coro_destroy_stacks (aTHX);
		758	}
		759
		760	static void
		761	free_coro_mortal (pTHX)
		762	{
		763	if (expect_true (coro_mortal))
		764	{
		765	SvREFCNT_dec (coro_mortal);
		766	coro_mortal = 0;
		767	}
		768	}
		769
		770	static int
		771	runops_trace (pTHX)
		772	{
		773	COP *oldcop = 0;
		774	int oldcxix = -2;
		775	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		776	coro_cctx *cctx = coro->cctx;
		777
		778	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		779	{
		780	PERL_ASYNC_CHECK ();
		781
		782	if (cctx->flags & CC_TRACE_ALL)
		783	{
		784	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		785	{
		786	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		787	SV **bot, **top;
		788	AV *av = newAV (); /* return values */
		789	SV **cb;
		790	dSP;
		791
		792	GV *gv = CvGV (cx->blk_sub.cv);
		793	SV *fullname = sv_2mortal (newSV (0));
		794	if (isGV (gv))
		795	gv_efullname3 (fullname, gv, 0);
		796
		797	bot = PL_stack_base + cx->blk_oldsp + 1;
		798	top = cx->blk_gimme == G_ARRAY ? SP + 1
		799	: cx->blk_gimme == G_SCALAR ? bot + 1
		800	: bot;
		801
		802	av_extend (av, top - bot);
		803	while (bot < top)
		804	av_push (av, SvREFCNT_inc (*bot++));
		805
		806	PL_runops = RUNOPS_DEFAULT;
		807	ENTER;
		808	SAVETMPS;
		809	EXTEND (SP, 3);
		810	PUSHMARK (SP);
		811	PUSHs (&PL_sv_no);
		812	PUSHs (fullname);
		813	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		814	PUTBACK;
		815	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		816	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		817	SPAGAIN;
		818	FREETMPS;
		819	LEAVE;
		820	PL_runops = runops_trace;
		821	}
		822
		823	if (oldcop != PL_curcop)
		824	{
		825	oldcop = PL_curcop;
		826
		827	if (PL_curcop != &PL_compiling)
		828	{
		829	SV **cb;
		830
		831	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		832	{
		833	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		834
		835	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		836	{
		837	runops_proc_t old_runops = PL_runops;
		838	dSP;
		839	GV *gv = CvGV (cx->blk_sub.cv);
		840	SV *fullname = sv_2mortal (newSV (0));
		841
		842	if (isGV (gv))
		843	gv_efullname3 (fullname, gv, 0);
		844
		845	PL_runops = RUNOPS_DEFAULT;
		846	ENTER;
		847	SAVETMPS;
		848	EXTEND (SP, 3);
		849	PUSHMARK (SP);
		850	PUSHs (&PL_sv_yes);
		851	PUSHs (fullname);
		852	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		853	PUTBACK;
		854	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		855	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		856	SPAGAIN;
		857	FREETMPS;
		858	LEAVE;
		859	PL_runops = runops_trace;
		860	}
		861
		862	oldcxix = cxstack_ix;
		863	}
		864
		865	if (cctx->flags & CC_TRACE_LINE)
		866	{
		867	dSP;
		868
		869	PL_runops = RUNOPS_DEFAULT;
		870	ENTER;
		871	SAVETMPS;
		872	EXTEND (SP, 3);
		873	PL_runops = RUNOPS_DEFAULT;
		874	PUSHMARK (SP);
		875	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		876	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		877	PUTBACK;
		878	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		879	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		880	SPAGAIN;
		881	FREETMPS;
		882	LEAVE;
		883	PL_runops = runops_trace;
		884	}
		885	}
		886	}
		887	}
		888	}
		889
		890	TAINT_NOT;
		891	return 0;
		892	}
		893
		894	/* inject a fake call to Coro::State::_cctx_init into the execution */
		895	/* _cctx_init should be careful, as it could be called at almost any time */
		896	/* during execution of a perl program */
		897	static void NOINLINE
		898	cctx_prepare (pTHX_ coro_cctx *cctx)
		899	{
		900	dSP;
		901	LOGOP myop;
		902
		903	PL_top_env = &PL_start_env;
		904
		905	if (cctx->flags & CC_TRACE)
		906	PL_runops = runops_trace;
		907
		908	Zero (&myop, 1, LOGOP);
		909	myop.op_next = PL_op;
		910	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		911
		912	PUSHMARK (SP);
		913	EXTEND (SP, 2);
		914	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		915	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		916	PUTBACK;
		917	PL_op = (OP *)&myop;
		918	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		919	SPAGAIN;
		920	}
		921
		922	/*
		923	* this is a _very_ stripped down perl interpreter ;)
		924	*/
		925	static void
		926	cctx_run (void *arg)
		927	{
600	dTHX;	928	dTHX;
601	dSP;
602	Coro__State ctx = (Coro__State)arg;
603	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
604		929
605	coro_init_stacks (aTHX);	930	/* cctx_run is the alternative tail of transfer(), so unlock here. */
606	/*PL_curcop = 0;*/	931	UNLOCK;
607	/*PL_in_eval = PL_in_eval;*/ /* inherit */
608	SvREFCNT_dec (GvAV (PL_defgv));
609	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
610		932
611	SPAGAIN;	933	/* we now skip the entersub that lead to transfer() */
		934	PL_op = PL_op->op_next;
612		935
613	if (ctx->stack)	936	/* inject a fake subroutine call to cctx_init */
614	{	937	cctx_prepare (aTHX_ (coro_cctx *)arg);
615	ctx->cursp = 0;
616		938
617	PUSHMARK(SP);	939	/* somebody or something will hit me for both perl_run and PL_restartop */
618	PUTBACK;	940	PL_restartop = PL_op;
619	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	941	perl_run (PL_curinterp);
620		942
621	if (SvTRUE (ERRSV))	943	/*
622	croak (NULL);	944	* If perl-run returns we assume exit() was being called or the coro
623	else	945	* fell off the end, which seems to be the only valid (non-bug)
624	croak ("FATAL: CCTXT coroutine returned!");	946	* reason for perl_run to return. We try to exit by jumping to the
		947	* bootstrap-time "top" top_env, as we cannot restore the "main"
		948	* coroutine as Coro has no such concept
		949	*/
		950	PL_top_env = main_top_env;
		951	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		952	}
		953
		954	static coro_cctx *
		955	cctx_new ()
		956	{
		957	coro_cctx *cctx;
		958	void *stack_start;
		959	size_t stack_size;
		960
		961	++cctx_count;
		962
		963	Newz (0, cctx, 1, coro_cctx);
		964
		965	#if HAVE_MMAP
		966	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		967	/* mmap supposedly does allocate-on-write for us */
		968	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		969
		970	if (cctx->sptr != (void *)-1)
		971	{
		972	# if CORO_STACKGUARD
		973	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		974	# endif
		975	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		976	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		977	cctx->flags |= CC_MAPPED;
625	}	978	}
626	else	979	else
627	{	980	#endif
628	UNOP myop;
629
630	PL_op = (OP *)&myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PUSHMARK(SP);
637	XPUSHs (sub_init);
638	/*
639	* the next line is slightly wrong, as PL_op->op_next
640	* is actually being executed so we skip the first op.
641	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)
644	*/
645	PUTBACK;
646	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647	SPAGAIN;
648
649	ENTER; /* necessary e.g. for dounwind */
650	}	981	{
651	}	982	cctx->ssize = coro_stacksize * (long)sizeof (long);
		983	New (0, cctx->sptr, coro_stacksize, long);
652		984
653	static void	985	if (!cctx->sptr)
654	continue_coro (void *arg)	986	{
655	{	987	perror ("FATAL: unable to allocate stack for coroutine");
656	/*	988	_exit (EXIT_FAILURE);
657	* this is a _very_ stripped down perl interpreter ;)	989	}
658	*/
659	dTHX;
660	Coro__State ctx = (Coro__State)arg;
661		990
662	PL_top_env = &ctx->start_env;	991	stack_start = cctx->sptr;
		992	stack_size = cctx->ssize;
		993	}
663		994
664	ctx->cursp = 0;	995	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
665	PL_op = PL_op->op_next;	996	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
666	CALLRUNOPS(aTHX);
667		997
668	abort ();	998	return cctx;
669	}	999	}
670		1000
671	static void	1001	static void
		1002	cctx_destroy (coro_cctx *cctx)
		1003	{
		1004	if (!cctx)
		1005	return;
		1006
		1007	--cctx_count;
		1008
		1009	#if CORO_USE_VALGRIND
		1010	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1011	#endif
		1012
		1013	#if HAVE_MMAP
		1014	if (cctx->flags & CC_MAPPED)
		1015	munmap (cctx->sptr, cctx->ssize);
		1016	else
		1017	#endif
		1018	Safefree (cctx->sptr);
		1019
		1020	Safefree (cctx);
		1021	}
		1022
		1023	/* wether this cctx should be destructed */
		1024	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1025
		1026	static coro_cctx *
		1027	cctx_get (pTHX)
		1028	{
		1029	while (expect_true (cctx_first))
		1030	{
		1031	coro_cctx *cctx = cctx_first;
		1032	cctx_first = cctx->next;
		1033	--cctx_idle;
		1034
		1035	if (expect_true (!CCTX_EXPIRED (cctx)))
		1036	return cctx;
		1037
		1038	cctx_destroy (cctx);
		1039	}
		1040
		1041	return cctx_new ();
		1042	}
		1043
		1044	static void
		1045	cctx_put (coro_cctx *cctx)
		1046	{
		1047	/* free another cctx if overlimit */
		1048	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1049	{
		1050	coro_cctx *first = cctx_first;
		1051	cctx_first = first->next;
		1052	--cctx_idle;
		1053
		1054	cctx_destroy (first);
		1055	}
		1056
		1057	++cctx_idle;
		1058	cctx->next = cctx_first;
		1059	cctx_first = cctx;
		1060	}
		1061
		1062	/** coroutine switching *****************************************************/
		1063
		1064	static void
		1065	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1066	{
		1067	if (expect_true (prev != next))
		1068	{
		1069	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1070	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1071
		1072	if (expect_false (next->flags & CF_RUNNING))
		1073	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1074
		1075	if (expect_false (next->flags & CF_DESTROYED))
		1076	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1077
		1078	if (
		1079	#if PERL_VERSION_ATLEAST (5,9,0)
		1080	expect_false (PL_parser)
		1081	#else
		1082	expect_false (PL_lex_state != LEX_NOTPARSING)
		1083	#endif
		1084	)
		1085	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1086	}
		1087	}
		1088
		1089	/* always use the TRANSFER macro */
		1090	static void NOINLINE
672	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	1091	transfer (pTHX_ struct coro *prev, struct coro *next)
673	{	1092	{
674	dSTACKLEVEL;	1093	dSTACKLEVEL;
675		1094
676	if (prev != next)	1095	/* sometimes transfer is only called to set idle_sp */
		1096	if (expect_false (!next))
		1097	{
		1098	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1099	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
677	{	1100	}
678	if (next->mainstack)	1101	else if (expect_true (prev != next))
		1102	{
		1103	coro_cctx *prev__cctx;
		1104
		1105	if (expect_false (prev->flags & CF_NEW))
679	{	1106	{
680	LOCK;	1107	/* create a new empty context */
681	SAVE (prev, flags);	1108	Newz (0, prev->cctx, 1, coro_cctx);
682	LOAD (next);	1109	prev->flags &= ~CF_NEW;
683	UNLOCK;	1110	prev->flags |= CF_RUNNING;
684
685	/* mark this state as in-use */
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	prev->cursp = stacklevel;
713	/* don't add any code here */
714	}
715	else
716	next->cursp = stacklevel;
717	}	1111	}
718	else if (next->tmps_ix == -2)	1112
719	croak ("tried to transfer to running coroutine");	1113	prev->flags &= ~CF_RUNNING;
		1114	next->flags |= CF_RUNNING;
		1115
		1116	LOCK;
		1117
		1118	if (expect_false (next->flags & CF_NEW))
		1119	{
		1120	/* need to start coroutine */
		1121	next->flags &= ~CF_NEW;
		1122	/* first get rid of the old state */
		1123	save_perl (aTHX_ prev);
		1124	/* setup coroutine call */
		1125	coro_setup (aTHX_ next);
		1126	}
720	else	1127	else
721	{	1128	{
722	LOCK;	1129	/* coroutine already started */
723	SAVE (prev, -1); /* first get rid of the old state */	1130	save_perl (aTHX_ prev);
		1131	load_perl (aTHX_ next);
		1132	}
		1133
		1134	prev__cctx = prev->cctx;
		1135
		1136	/* possibly "free" the cctx */
		1137	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1138	{
		1139	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1140	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1141
		1142	prev->cctx = 0;
		1143
		1144	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1145	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1146	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1147	if (!next->cctx)
		1148	next->cctx = cctx_get (aTHX);
		1149
		1150	cctx_put (prev__cctx);
		1151	}
		1152
		1153	++next->usecount;
		1154
		1155	if (expect_true (!next->cctx))
		1156	next->cctx = cctx_get (aTHX);
		1157
		1158	if (expect_false (prev__cctx != next->cctx))
		1159	{
		1160	prev__cctx->top_env = PL_top_env;
		1161	PL_top_env = next->cctx->top_env;
		1162	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1163	}
		1164
		1165	free_coro_mortal (aTHX);
724	UNLOCK;	1166	UNLOCK;
725		1167
726	if (flags & TRANSFER_SAVE_CCTXT)	1168	if (expect_false (prev->throw || next->throw))
		1169	{
		1170	struct coro *coro = SvSTATE (coro_current);
		1171
		1172	if (coro->throw)
727	{	1173	{
728	if (!prev->stack)	1174	SV *exception = coro->throw;
729	allocate_stack (prev, 0);	1175	coro->throw = 0;
730		1176	sv_setsv (ERRSV, exception);
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	PL_top_env = &next->start_env;
734
735	setup_coro (next);
736	next->cursp = stacklevel;
737
738	prev->stack->refcnt++;
739	prev->stack->usecnt++;
740	next->stack = prev->stack;
741	next->gencnt = prev->gencnt;
742	}
743	else
744	{
745	assert (!next->stack);
746	allocate_stack (next, 1);
747	coro_create (&(next->stack->cctx),
748	setup_coro, (void *)next,
749	next->stack->sptr, labs (next->stack->ssize));
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	}
755	else
756	{
757	setup_coro (next);	1177	croak (0);
758	next->cursp = stacklevel;
759	}	1178	}
760	}	1179	}
761	}	1180	}
		1181	}
762		1182
763	LOCK;	1183	struct transfer_args
764	if (coro_mortal)	1184	{
765	{	1185	struct coro *prev, *next;
766	SvREFCNT_dec (coro_mortal);	1186	};
767	coro_mortal = 0;	1187
		1188	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1189	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1190
		1191	/** high level stuff ********************************************************/
		1192
		1193	static int
		1194	coro_state_destroy (pTHX_ struct coro *coro)
		1195	{
		1196	if (coro->flags & CF_DESTROYED)
		1197	return 0;
		1198
		1199	coro->flags |= CF_DESTROYED;
		1200
		1201	if (coro->flags & CF_READY)
768	}	1202	{
		1203	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1204	/* alternative: look through all ready queues and remove the coro */
		1205	LOCK;
		1206	--coro_nready;
769	UNLOCK;	1207	UNLOCK;
770	}	1208	}
		1209	else
		1210	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
771		1211
772	#define SV_CORO(sv,func) \	1212	if (coro->mainstack && coro->mainstack != main_mainstack)
773	do { \	1213	{
774	if (SvROK (sv)) \	1214	struct coro temp;
775	sv = SvRV (sv); \
776	\
777	if (SvTYPE (sv) == SVt_PVHV) \
778	{ \
779	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
780	\
781	if (!he) \
782	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
783	\
784	(sv) = SvRV (HeVAL(he)); \
785	} \
786	\
787	/* must also be changed inside Coro::Cont::yield */ \
788	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
789	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
790	\
791	} while(0)
792		1215
793	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1216	if (coro->flags & CF_RUNNING)
		1217	croak ("FATAL: tried to destroy currently running coroutine");
794		1218
		1219	save_perl (aTHX_ &temp);
		1220	load_perl (aTHX_ coro);
		1221
		1222	coro_destroy (aTHX_ coro);
		1223
		1224	load_perl (aTHX_ &temp);
		1225
		1226	coro->slot = 0;
		1227	}
		1228
		1229	cctx_destroy (coro->cctx);
		1230	SvREFCNT_dec (coro->args);
		1231
		1232	if (coro->next) coro->next->prev = coro->prev;
		1233	if (coro->prev) coro->prev->next = coro->next;
		1234	if (coro == coro_first) coro_first = coro->next;
		1235
		1236	return 1;
		1237	}
		1238
795	static void	1239	static int
		1240	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1241	{
		1242	struct coro *coro = (struct coro *)mg->mg_ptr;
		1243	mg->mg_ptr = 0;
		1244
		1245	coro->hv = 0;
		1246
		1247	if (--coro->refcnt < 0)
		1248	{
		1249	coro_state_destroy (aTHX_ coro);
		1250	Safefree (coro);
		1251	}
		1252
		1253	return 0;
		1254	}
		1255
		1256	static int
		1257	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1258	{
		1259	struct coro *coro = (struct coro *)mg->mg_ptr;
		1260
		1261	++coro->refcnt;
		1262
		1263	return 0;
		1264	}
		1265
		1266	static MGVTBL coro_state_vtbl = {
		1267	0, 0, 0, 0,
		1268	coro_state_free,
		1269	0,
		1270	#ifdef MGf_DUP
		1271	coro_state_dup,
		1272	#else
		1273	# define MGf_DUP 0
		1274	#endif
		1275	};
		1276
		1277	static void
		1278	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1279	{
		1280	ta->prev = SvSTATE (prev_sv);
		1281	ta->next = SvSTATE (next_sv);
		1282	TRANSFER_CHECK (*ta);
		1283	}
		1284
		1285	static void
796	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1286	api_transfer (SV *prev_sv, SV *next_sv)
797	{	1287	{
798	SV_CORO (prev, "Coro::transfer");	1288	dTHX;
799	SV_CORO (next, "Coro::transfer");	1289	struct transfer_args ta;
800		1290
801	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1291	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1292	TRANSFER (ta);
802	}	1293	}
803		1294
804	/** Coro ********************************************************************/	1295	/** Coro ********************************************************************/
805		1296
806	#define PRIO_MAX 3
807	#define PRIO_HIGH 1
808	#define PRIO_NORMAL 0
809	#define PRIO_LOW -1
810	#define PRIO_IDLE -3
811	#define PRIO_MIN -4
812
813	/* for Coro.pm */
814	static GV *coro_current, *coro_idle;
815	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;
817
818	static void	1297	static void
819	coro_enq (pTHX_ SV *sv)	1298	coro_enq (pTHX_ SV *coro_sv)
820	{	1299	{
821	SV **xprio;
822	int prio;
823
824	if (SvTYPE (sv) != SVt_PVHV)
825	croak ("Coro::ready tried to enqueue something that is not a coroutine");
826
827	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
828	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
829
830	prio = prio > PRIO_MAX ? PRIO_MAX
831	: prio < PRIO_MIN ? PRIO_MIN
832	: prio;
833
834	av_push (coro_ready [prio - PRIO_MIN], sv);	1300	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
835	coro_nready++;
836	}	1301	}
837		1302
838	static SV *	1303	static SV *
839	coro_deq (pTHX_ int min_prio)	1304	coro_deq (pTHX_ int min_prio)
840	{	1305	{
…		…
843	min_prio -= PRIO_MIN;	1308	min_prio -= PRIO_MIN;
844	if (min_prio < 0)	1309	if (min_prio < 0)
845	min_prio = 0;	1310	min_prio = 0;
846		1311
847	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1312	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
848	if (av_len (coro_ready[prio]) >= 0)	1313	if (AvFILLp (coro_ready [prio]) >= 0)
849	{
850	coro_nready--;
851	return av_shift (coro_ready[prio]);	1314	return av_shift (coro_ready [prio]);
852	}
853		1315
854	return 0;	1316	return 0;
855	}	1317	}
856		1318
857	static void	1319	static int
858	api_ready (SV *coro)	1320	api_ready (SV *coro_sv)
859	{	1321	{
860	dTHX;	1322	dTHX;
		1323	struct coro *coro;
861		1324
862	if (SvROK (coro))	1325	if (SvROK (coro_sv))
863	coro = SvRV (coro);	1326	coro_sv = SvRV (coro_sv);
		1327
		1328	coro = SvSTATE (coro_sv);
		1329
		1330	if (coro->flags & CF_READY)
		1331	return 0;
		1332
		1333	coro->flags |= CF_READY;
864		1334
865	LOCK;	1335	LOCK;
866	coro_enq (aTHX_ SvREFCNT_inc (coro));	1336	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1337	++coro_nready;
867	UNLOCK;	1338	UNLOCK;
		1339
		1340	return 1;
		1341	}
		1342
		1343	static int
		1344	api_is_ready (SV *coro_sv)
		1345	{
		1346	dTHX;
		1347	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1348	}
		1349
		1350	static void
		1351	prepare_schedule (pTHX_ struct transfer_args *ta)
		1352	{
		1353	SV *prev_sv, *next_sv;
		1354
		1355	for (;;)
		1356	{
		1357	LOCK;
		1358	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1359
		1360	/* nothing to schedule: call the idle handler */
		1361	if (expect_false (!next_sv))
		1362	{
		1363	dSP;
		1364	UNLOCK;
		1365
		1366	ENTER;
		1367	SAVETMPS;
		1368
		1369	PUSHMARK (SP);
		1370	PUTBACK;
		1371	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1372
		1373	FREETMPS;
		1374	LEAVE;
		1375	continue;
		1376	}
		1377
		1378	ta->next = SvSTATE (next_sv);
		1379
		1380	/* cannot transfer to destroyed coros, skip and look for next */
		1381	if (expect_false (ta->next->flags & CF_DESTROYED))
		1382	{
		1383	UNLOCK;
		1384	SvREFCNT_dec (next_sv);
		1385	/* coro_nready is already taken care of by destroy */
		1386	continue;
		1387	}
		1388
		1389	--coro_nready;
		1390	UNLOCK;
		1391	break;
		1392	}
		1393
		1394	/* free this only after the transfer */
		1395	prev_sv = SvRV (coro_current);
		1396	ta->prev = SvSTATE (prev_sv);
		1397	TRANSFER_CHECK (*ta);
		1398	assert (ta->next->flags & CF_READY);
		1399	ta->next->flags &= ~CF_READY;
		1400	SvRV_set (coro_current, next_sv);
		1401
		1402	LOCK;
		1403	free_coro_mortal (aTHX);
		1404	coro_mortal = prev_sv;
		1405	UNLOCK;
		1406	}
		1407
		1408	static void
		1409	prepare_cede (pTHX_ struct transfer_args *ta)
		1410	{
		1411	api_ready (coro_current);
		1412	prepare_schedule (aTHX_ ta);
		1413	}
		1414
		1415	static int
		1416	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1417	{
		1418	if (coro_nready)
		1419	{
		1420	SV *prev = SvRV (coro_current);
		1421	prepare_schedule (aTHX_ ta);
		1422	api_ready (prev);
		1423	return 1;
		1424	}
		1425	else
		1426	return 0;
868	}	1427	}
869		1428
870	static void	1429	static void
871	api_schedule (void)	1430	api_schedule (void)
872	{	1431	{
873	dTHX;	1432	dTHX;
		1433	struct transfer_args ta;
874		1434
875	SV *prev, *next;	1435	prepare_schedule (aTHX_ &ta);
876		1436	TRANSFER (ta);
877	LOCK;
878
879	prev = SvRV (GvSV (coro_current));
880	next = coro_deq (aTHX_ PRIO_MIN);
881
882	if (!next)
883	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
884
885	/* free this only after the transfer */
886	coro_mortal = prev;
887	SV_CORO (prev, "Coro::schedule");
888
889	SvRV (GvSV (coro_current)) = next;
890
891	SV_CORO (next, "Coro::schedule");
892
893	UNLOCK;
894
895	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
896	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
897	}	1437	}
898		1438
899	static void	1439	static int
900	api_cede (void)	1440	api_cede (void)
901	{	1441	{
902	dTHX;	1442	dTHX;
		1443	struct transfer_args ta;
903		1444
904	LOCK;	1445	prepare_cede (aTHX_ &ta);
905	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
906	UNLOCK;
907		1446
908	api_schedule ();	1447	if (expect_true (ta.prev != ta.next))
		1448	{
		1449	TRANSFER (ta);
		1450	return 1;
		1451	}
		1452	else
		1453	return 0;
909	}	1454	}
910		1455
		1456	static int
		1457	api_cede_notself (void)
		1458	{
		1459	dTHX;
		1460	struct transfer_args ta;
		1461
		1462	if (prepare_cede_notself (aTHX_ &ta))
		1463	{
		1464	TRANSFER (ta);
		1465	return 1;
		1466	}
		1467	else
		1468	return 0;
		1469	}
		1470
		1471	static void
		1472	api_trace (SV *coro_sv, int flags)
		1473	{
		1474	dTHX;
		1475	struct coro *coro = SvSTATE (coro_sv);
		1476
		1477	if (flags & CC_TRACE)
		1478	{
		1479	if (!coro->cctx)
		1480	coro->cctx = cctx_new ();
		1481	else if (!(coro->cctx->flags & CC_TRACE))
		1482	croak ("cannot enable tracing on coroutine with custom stack");
		1483
		1484	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1485	}
		1486	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1487	{
		1488	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1489
		1490	if (coro->flags & CF_RUNNING)
		1491	PL_runops = RUNOPS_DEFAULT;
		1492	else
		1493	coro->slot->runops = RUNOPS_DEFAULT;
		1494	}
		1495	}
		1496
911	MODULE = Coro::State PACKAGE = Coro::State	1497	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
912		1498
913	PROTOTYPES: ENABLE	1499	PROTOTYPES: DISABLE
914		1500
915	BOOT:	1501	BOOT:
916	{ /* {} necessary for stoopid perl-5.6.x */	1502	{
917	#ifdef USE_ITHREADS	1503	#ifdef USE_ITHREADS
918	MUTEX_INIT (&coro_mutex);	1504	MUTEX_INIT (&coro_mutex);
919	#endif	1505	#endif
920	BOOT_PAGESIZE;	1506	BOOT_PAGESIZE;
921		1507
922	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1508	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
923	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1509	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1510
		1511	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1512	sv_diehook = coro_get_sv (aTHX_ "Coro::State::DIEHOOK" , TRUE);
		1513	sv_warnhook = coro_get_sv (aTHX_ "Coro::State::WARNHOOK", TRUE);
		1514
		1515	if (!PL_diehook ) hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);
		1516	if (!PL_warnhook) hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);
		1517
924	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1518	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
925		1519
926	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
927	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1521	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
928	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1522	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
929	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1523	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
930		1524
931	main_mainstack = PL_mainstack;	1525	main_mainstack = PL_mainstack;
		1526	main_top_env = PL_top_env;
		1527
		1528	while (main_top_env->je_prev)
		1529	main_top_env = main_top_env->je_prev;
932		1530
933	coroapi.ver = CORO_API_VERSION;	1531	coroapi.ver = CORO_API_VERSION;
		1532	coroapi.rev = CORO_API_REVISION;
934	coroapi.transfer = api_transfer;	1533	coroapi.transfer = api_transfer;
935	}
936		1534
937	Coro::State	1535	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
938	_newprocess(args)	1536	}
939	SV * args	1537
940	PROTOTYPE: $	1538	SV *
		1539	new (char *klass, ...)
941	CODE:	1540	CODE:
942	Coro__State coro;	1541	{
		1542	struct coro *coro;
		1543	HV *hv;
		1544	int i;
943		1545
944	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
945	croak ("Coro::State::_newprocess expects an arrayref");
946
947	Newz (0, coro, 1, struct coro);	1546	Newz (0, coro, 1, struct coro);
		1547	coro->args = newAV ();
		1548	coro->flags = CF_NEW;
948		1549
949	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1550	if (coro_first) coro_first->prev = coro;
950	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1551	coro->next = coro_first;
951	/*coro->stack = 0;*/	1552	coro_first = coro;
952		1553
953	/* same as JMPENV_BOOTSTRAP */	1554	coro->hv = hv = newHV ();
954	/* we might be able to recycle start_env, but safe is safe */	1555	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
955	/*Zero(&coro->start_env, 1, JMPENV);*/	1556	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956	coro->start_env.je_ret = -1;
957	coro->start_env.je_mustcatch = TRUE;
958		1557
959	RETVAL = coro;	1558	av_extend (coro->args, items - 1);
		1559	for (i = 1; i < items; i++)
		1560	av_push (coro->args, newSVsv (ST (i)));
		1561	}
960	OUTPUT:	1562	OUTPUT:
961	RETVAL	1563	RETVAL
962		1564
		1565	# these not obviously related functions are all rolled into the same xs
		1566	# function to increase chances that they all will call transfer with the same
		1567	# stack offset
963	void	1568	void
964	transfer(prev, next, flags)	1569	_set_stacklevel (...)
965	SV *prev	1570	ALIAS:
966	SV *next	1571	Coro::State::transfer = 1
967	int flags	1572	Coro::schedule = 2
968	PROTOTYPE: @	1573	Coro::cede = 3
		1574	Coro::cede_notself = 4
969	CODE:	1575	CODE:
		1576	{
		1577	struct transfer_args ta;
		1578
		1579	switch (ix)
		1580	{
		1581	case 0:
		1582	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1583	ta.next = 0;
		1584	break;
		1585
		1586	case 1:
		1587	if (items != 2)
		1588	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1589
		1590	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1591	break;
		1592
		1593	case 2:
		1594	prepare_schedule (aTHX_ &ta);
		1595	break;
		1596
		1597	case 3:
		1598	prepare_cede (aTHX_ &ta);
		1599	break;
		1600
		1601	case 4:
		1602	if (!prepare_cede_notself (aTHX_ &ta))
		1603	XSRETURN_EMPTY;
		1604
		1605	break;
		1606	}
		1607
		1608	BARRIER;
970	PUTBACK;	1609	PUTBACK;
971	SV_CORO (next, "Coro::transfer");	1610	TRANSFER (ta);
972	SV_CORO (prev, "Coro::transfer");	1611	SPAGAIN; /* might be the sp of a different coroutine now */
973	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1612	/* be extra careful not to ever do anything after TRANSFER */
974	SPAGAIN;	1613	}
		1614
		1615	bool
		1616	_destroy (SV *coro_sv)
		1617	CODE:
		1618	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1619	OUTPUT:
		1620	RETVAL
975		1621
976	void	1622	void
977	DESTROY(coro)
978	Coro::State coro
979	CODE:
980
981	if (coro->mainstack && coro->mainstack != main_mainstack)
982	{
983	struct coro temp;
984
985	PUTBACK;
986	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
987	LOAD (aTHX_ coro);
988	SPAGAIN;
989
990	destroy_stacks (aTHX);
991
992	LOAD ((&temp)); /* this will get rid of defsv etc.. */
993	SPAGAIN;
994
995	coro->mainstack = 0;
996	}
997
998	deallocate_stack (coro);
999	SvREFCNT_dec (coro->args);
1000	Safefree (coro);
1001
1002	void
1003	_exit(code)	1623	_exit (code)
1004	int code	1624	int code
1005	PROTOTYPE: $	1625	PROTOTYPE: $
1006	CODE:	1626	CODE:
1007	_exit (code);	1627	_exit (code);
1008		1628
1009	MODULE = Coro::State PACKAGE = Coro::Cont	1629	int
		1630	cctx_stacksize (int new_stacksize = 0)
		1631	CODE:
		1632	RETVAL = coro_stacksize;
		1633	if (new_stacksize)
		1634	coro_stacksize = new_stacksize;
		1635	OUTPUT:
		1636	RETVAL
1010		1637
1011	# this is slightly dirty (should expose a c-level api)	1638	int
		1639	cctx_count ()
		1640	CODE:
		1641	RETVAL = cctx_count;
		1642	OUTPUT:
		1643	RETVAL
		1644
		1645	int
		1646	cctx_idle ()
		1647	CODE:
		1648	RETVAL = cctx_idle;
		1649	OUTPUT:
		1650	RETVAL
1012		1651
1013	void	1652	void
1014	yield(...)	1653	list ()
1015	PROTOTYPE: @	1654	PPCODE:
		1655	{
		1656	struct coro *coro;
		1657	for (coro = coro_first; coro; coro = coro->next)
		1658	if (coro->hv)
		1659	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1660	}
		1661
		1662	void
		1663	call (Coro::State coro, SV *coderef)
		1664	ALIAS:
		1665	eval = 1
		1666	CODE:
		1667	{
		1668	if (coro->mainstack)
		1669	{
		1670	struct coro temp;
		1671
		1672	if (!(coro->flags & CF_RUNNING))
		1673	{
		1674	save_perl (aTHX_ &temp);
		1675	load_perl (aTHX_ coro);
		1676	}
		1677
		1678	{
		1679	dSP;
		1680	ENTER;
		1681	SAVETMPS;
		1682	PUTBACK;
		1683	PUSHSTACK;
		1684	PUSHMARK (SP);
		1685
		1686	if (ix)
		1687	eval_sv (coderef, 0);
		1688	else
		1689	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1690
		1691	POPSTACK;
		1692	SPAGAIN;
		1693	FREETMPS;
		1694	LEAVE;
		1695	PUTBACK;
		1696	}
		1697
		1698	if (!(coro->flags & CF_RUNNING))
		1699	{
		1700	save_perl (aTHX_ coro);
		1701	load_perl (aTHX_ &temp);
		1702	}
		1703	}
		1704	}
		1705
		1706	SV *
		1707	is_ready (Coro::State coro)
		1708	PROTOTYPE: $
		1709	ALIAS:
		1710	is_ready = CF_READY
		1711	is_running = CF_RUNNING
		1712	is_new = CF_NEW
		1713	is_destroyed = CF_DESTROYED
		1714	CODE:
		1715	RETVAL = boolSV (coro->flags & ix);
		1716	OUTPUT:
		1717	RETVAL
		1718
		1719	void
		1720	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1721
		1722	SV *
		1723	has_stack (Coro::State coro)
		1724	PROTOTYPE: $
		1725	CODE:
		1726	RETVAL = boolSV (!!coro->cctx);
		1727	OUTPUT:
		1728	RETVAL
		1729
		1730	int
		1731	is_traced (Coro::State coro)
		1732	PROTOTYPE: $
		1733	CODE:
		1734	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1735	OUTPUT:
		1736	RETVAL
		1737
		1738	IV
		1739	rss (Coro::State coro)
		1740	PROTOTYPE: $
		1741	ALIAS:
		1742	usecount = 1
1016	CODE:	1743	CODE:
1017	SV *yieldstack;	1744	switch (ix)
1018	SV *sv;	1745	{
1019	AV *defav = GvAV (PL_defgv);	1746	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1020	struct coro *prev, *next;	1747	case 1: RETVAL = coro->usecount; break;
1021
1022	yieldstack = *hv_fetch (
1023	(HV *)SvRV (GvSV (coro_current)),
1024	"yieldstack", sizeof ("yieldstack") - 1,
1025	0	1748	}
1026	);	1749	OUTPUT:
		1750	RETVAL
1027		1751
1028	/* set up @_ -- ugly */
1029	av_clear (defav);
1030	av_fill (defav, items - 1);
1031	while (items--)
1032	av_store (defav, items, SvREFCNT_inc (ST(items)));
1033
1034	sv = av_pop ((AV *)SvRV (yieldstack));
1035	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1036	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1037	SvREFCNT_dec (sv);
1038
1039	transfer (aTHX_ prev, next, 0);
1040		1752
1041	MODULE = Coro::State PACKAGE = Coro	1753	MODULE = Coro::State PACKAGE = Coro
1042		1754
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1755	BOOT:
1046	{	1756	{
1047	int i;	1757	int i;
		1758
		1759	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1760	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1761	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1762
		1763	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1764	SvREADONLY_on (coro_current);
		1765
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1766	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1767
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1768	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1769	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1770	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1771	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1772	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1773	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059		1774
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1775	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061	coro_ready[i] = newAV ();	1776	coro_ready[i] = newAV ();
1062		1777
1063	{	1778	{
1064	SV *sv = perl_get_sv("Coro::API", 1);	1779	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1780	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1065		1781
1066	coroapi.schedule = api_schedule;	1782	coroapi.schedule = api_schedule;
1067	coroapi.cede = api_cede;	1783	coroapi.cede = api_cede;
		1784	coroapi.cede_notself = api_cede_notself;
1068	coroapi.ready = api_ready;	1785	coroapi.ready = api_ready;
		1786	coroapi.is_ready = api_is_ready;
1069	coroapi.nready = &coro_nready;	1787	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1788	coroapi.current = coro_current;
1071		1789
1072	GCoroAPI = &coroapi;	1790	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1791	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1792	SvREADONLY_on (sv);
1075	}	1793	}
1076	}	1794	}
1077		1795
1078	#if !PERL_MICRO
1079
1080	void	1796	void
1081	ready(self)	1797	_set_current (SV *current)
1082	SV * self
1083	PROTOTYPE: $	1798	PROTOTYPE: $
1084	CODE:	1799	CODE:
1085	api_ready (self);	1800	SvREFCNT_dec (SvRV (coro_current));
1086		1801	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1087	#endif
1088		1802
1089	int	1803	int
		1804	prio (Coro::State coro, int newprio = 0)
		1805	ALIAS:
		1806	nice = 1
		1807	CODE:
		1808	{
		1809	RETVAL = coro->prio;
		1810
		1811	if (items > 1)
		1812	{
		1813	if (ix)
		1814	newprio = coro->prio - newprio;
		1815
		1816	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1817	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1818
		1819	coro->prio = newprio;
		1820	}
		1821	}
		1822	OUTPUT:
		1823	RETVAL
		1824
		1825	SV *
		1826	ready (SV *self)
		1827	PROTOTYPE: $
		1828	CODE:
		1829	RETVAL = boolSV (api_ready (self));
		1830	OUTPUT:
		1831	RETVAL
		1832
		1833	int
1090	nready(...)	1834	nready (...)
1091	PROTOTYPE:	1835	PROTOTYPE:
1092	CODE:	1836	CODE:
1093	RETVAL = coro_nready;	1837	RETVAL = coro_nready;
1094	OUTPUT:	1838	OUTPUT:
1095	RETVAL	1839	RETVAL
1096		1840
1097	void	1841	void
1098	schedule(...)	1842	throw (Coro::State self, SV *throw = &PL_sv_undef)
1099	PROTOTYPE:	1843	PROTOTYPE: $;$
		1844	CODE:
		1845	SvREFCNT_dec (self->throw);
		1846	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1847
		1848	# for async_pool speedup
		1849	void
		1850	_pool_1 (SV *cb)
1100	CODE:	1851	CODE:
1101	api_schedule ();	1852	{
		1853	struct coro *coro = SvSTATE (coro_current);
		1854	HV *hv = (HV *)SvRV (coro_current);
		1855	AV *defav = GvAV (PL_defgv);
		1856	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1857	AV *invoke_av;
		1858	int i, len;
		1859
		1860	if (!invoke)
		1861	croak ("\3async_pool terminate\2\n");
		1862
		1863	SvREFCNT_dec (coro->saved_deffh);
		1864	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1865
		1866	hv_store (hv, "desc", sizeof ("desc") - 1,
		1867	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1868
		1869	invoke_av = (AV *)SvRV (invoke);
		1870	len = av_len (invoke_av);
		1871
		1872	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1873
		1874	if (len > 0)
		1875	{
		1876	av_fill (defav, len - 1);
		1877	for (i = 0; i < len; ++i)
		1878	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1879	}
		1880
		1881	SvREFCNT_dec (invoke);
		1882	}
1102		1883
1103	void	1884	void
1104	cede(...)	1885	_pool_2 (SV *cb)
1105	PROTOTYPE:
1106	CODE:	1886	CODE:
1107	api_cede ();	1887	{
		1888	struct coro *coro = SvSTATE (coro_current);
1108		1889
1109	# and these are hacks	1890	sv_setsv (cb, &PL_sv_undef);
		1891
		1892	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1893	coro->saved_deffh = 0;
		1894
		1895	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1896	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1897	croak ("\3async_pool terminate\2\n");
		1898
		1899	av_clear (GvAV (PL_defgv));
		1900	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1901	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1902
		1903	coro->prio = 0;
		1904
		1905	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1906	api_trace (coro_current, 0);
		1907
		1908	av_push (av_async_pool, newSVsv (coro_current));
		1909	}
		1910
		1911
		1912	MODULE = Coro::State PACKAGE = Coro::AIO
		1913
1110	SV *	1914	SV *
1111	_aio_get_state ()	1915	_get_state ()
1112	CODE:	1916	CODE:
1113	{	1917	{
1114	struct {	1918	struct io_state *data;
1115	int errorno;
1116	int laststype;
1117	int laststatval;
1118	Stat_t statcache;
1119	} data;
1120		1919
		1920	RETVAL = newSV (sizeof (struct io_state));
		1921	data = (struct io_state *)SvPVX (RETVAL);
		1922	SvCUR_set (RETVAL, sizeof (struct io_state));
		1923	SvPOK_only (RETVAL);
		1924
1121	data.errorno = errno;	1925	data->errorno = errno;
1122	data.laststype = PL_laststype;	1926	data->laststype = PL_laststype;
1123	data.laststatval = PL_laststatval;	1927	data->laststatval = PL_laststatval;
1124	data.statcache = PL_statcache;	1928	data->statcache = PL_statcache;
1125
1126	RETVAL = newSVpvn ((char *)&data, sizeof data);
1127	}	1929	}
1128	OUTPUT:	1930	OUTPUT:
1129	RETVAL	1931	RETVAL
1130		1932
1131	void	1933	void
1132	_aio_set_state (char *data_)	1934	_set_state (char *data_)
1133	PROTOTYPE: $	1935	PROTOTYPE: $
1134	CODE:	1936	CODE:
1135	{	1937	{
1136	struct {	1938	struct io_state *data = (void *)data_;
1137	int errorno;
1138	int laststype;
1139	int laststatval;
1140	Stat_t statcache;
1141	} *data = (void *)data_;
1142		1939
1143	errno = data->errorno;	1940	errno = data->errorno;
1144	PL_laststype = data->laststype;	1941	PL_laststype = data->laststype;
1145	PL_laststatval = data->laststatval;	1942	PL_laststatval = data->laststatval;
1146	PL_statcache = data->statcache;	1943	PL_statcache = data->statcache;
1147	}	1944	}
		1945

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