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Comparing Coro/Coro/State.xs (file contents):
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC vs.
Revision 1.200 by root, Sun Oct 7 15:08:23 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
		5
1	#include "EXTERN.h"	6	#include "EXTERN.h"
2	#include "perl.h"	7	#include "perl.h"
3	#include "XSUB.h"	8	#include "XSUB.h"
4		9
5	#include "libcoro/coro.c"	10	#include "patchlevel.h"
6		11
7	#include <signal.h>	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
8		15
9	#ifdef HAVE_MMAP	16	#ifdef HAVE_MMAP
10	# include <unistd.h>	17	# include <unistd.h>
11	# include <sys/mman.h>	18	# include <sys/mman.h>
12	# ifndef MAP_ANONYMOUS	19	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS MAP_ANON	21	# define MAP_ANONYMOUS MAP_ANON
15	# else	22	# else
16	# undef HAVE_MMAP	23	# undef HAVE_MMAP
17	# endif	24	# endif
18	# endif	25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
19	#endif	33	# endif
		34	#else
		35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
20		38
21	#define MAY_FLUSH /* increases codesize and is rarely used */	39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
22		45
23	#define SUB_INIT "Coro::State::initialize"	46	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	47	#define MAX_IDLE_CCTX 8
25		48
26	/* The next macro should declare a variable stacklevel that contains and approximation	49	#define PERL_VERSION_ATLEAST(a,b,c) \
27	* to the current C stack pointer. Its property is that it changes with each call	50	(PERL_REVISION > (a) \
28	* and should be unique. */	51	|| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
		56	# ifndef PL_ppaddr
		57	# define PL_ppaddr ppaddr
		58	# endif
		59	# ifndef call_sv
		60	# define call_sv perl_call_sv
		61	# endif
		62	# ifndef get_sv
		63	# define get_sv perl_get_sv
		64	# endif
		65	# ifndef get_cv
		66	# define get_cv perl_get_cv
		67	# endif
		68	# ifndef IS_PADGV
		69	# define IS_PADGV(v) 0
		70	# endif
		71	# ifndef IS_PADCONST
		72	# define IS_PADCONST(v) 0
		73	# endif
		74	#endif
		75
		76	/* 5.8.7 */
		77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
		89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		90	# undef CORO_STACKGUARD
		91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
		104	#define dSTACKLEVEL volatile char stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
30		106
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		108
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
34		123
35	#include "CoroAPI.h"	124	#include "CoroAPI.h"
36		125
		126	#ifdef USE_ITHREADS
		127	static perl_mutex coro_mutex;
		128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		130	#else
		131	# define LOCK (void)0
		132	# define UNLOCK (void)0
		133	#endif
		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
		138	struct io_state
		139	{
		140	int errorno;
		141	I32 laststype;
		142	int laststatval;
		143	Stat_t statcache;
		144	};
		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
37	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
		148	static AV *main_mainstack; /* used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
		150	static HV *coro_state_stash, *coro_stash;
		151	static SV *coro_mortal; /* will be freed after next transfer */
38		152
39	/* this is actually not only the c stack but also c registers etc... */	153	static GV *irsgv; /* $/ */
		154	static GV *stdoutgv; /* *STDOUT */
		155
		156	static HV *hv_sig; /* %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
		165	static struct coro_cctx *cctx_first;
		166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		175	};
		176
		177	/* this is a structure representing a c-level coroutine */
		178	typedef struct coro_cctx {
		179	struct coro_cctx *next;
		180
		181	/* the stack */
		182	void *sptr;
		183	size_t ssize;
		184
		185	/* cpu state */
		186	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		187	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		188	JMPENV *top_env;
		189	coro_context cctx;
		190
		191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
		196
		197	enum {
		198	CF_RUNNING = 0x0001, /* coroutine is running */
		199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
40	typedef struct {	205	typedef struct {
41	int refcnt; /* pointer reference counter */	206	SV *defsv;
42	int usecnt; /* shared by how many coroutines */	207	AV *defav;
43	int gencnt; /* generation counter */	208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
44		214
45	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
46		216
47	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
48	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50
51	struct coro {	218	struct coro {
52	/* the optional C context */	219	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	220	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56		221
57	/* optionally saved, might be zero */	222	/* process data */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;	223	AV *mainstack;
70	SV **stack_sp;	224	perl_slots *slot; /* basically the saved sp */
71	OP *op;
72	SV **curpad;
73	AV *comppad;
74	SV **stack_base;
75	SV **stack_max;
76	SV **tmps_stack;
77	I32 tmps_floor;
78	I32 tmps_ix;
79	I32 tmps_max;
80	I32 *markstack;
81	I32 *markstack_ptr;
82	I32 *markstack_max;
83	I32 *scopestack;
84	I32 scopestack_ix;
85	I32 scopestack_max;
86	ANY *savestack;
87	I32 savestack_ix;
88	I32 savestack_max;
89	OP **retstack;
90	I32 retstack_ix;
91	I32 retstack_max;
92	COP *curcop;
93	JMPENV *top_env;
94		225
95	/* data associated with this coroutine (initial args) */	226	/* data associated with this coroutine (initial args) */
96	AV *args;	227	AV *args;
		228	int refcnt;
		229	int flags; /* CF_ flags */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV *throw;
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
		243	HV *hv; /* the perl hash associated with this coro, if any */
97	};	244	};
98		245
99	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
101
102	static AV *main_mainstack; /* used to differentiate between $main and others */
103	static HV *coro_state_stash;
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107	static SV *coro_mortal; /* will be freed after next transfer */
108
109	/* mostly copied from op.c:cv_clone2 */
110	STATIC AV *
111	clone_padlist (AV *protopadlist)
112	{
113	AV *av;
114	I32 ix;
115	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV *newpadlist, *newpad_name, *newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131
132	newpadlist = newAV ();
133	AvREAL_off (newpadlist);
134	av_store (newpadlist, 0, (SV *) newpad_name);
135	av_store (newpadlist, 1, (SV *) newpad);
136
137	av = newAV (); /* will be @_ */
138	av_extend (av, 0);
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141
142	for (ix = fpad; ix > 0; ix--)
143	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
145	if (namesv && namesv != &PL_sv_undef)
146	{
147	char *name = SvPVX (namesv); /* XXX */
148	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}
152	else
153	{ /* our own lexical */
154	SV *sv;
155	if (*name == '&')
156	sv = SvREFCNT_inc (ppad[ix]);
157	else if (*name == '@')
158	sv = (SV *) newAV ();
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}
167	}
168	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169	{
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}
179
180	#if 0 /* return -ENOTUNDERSTOOD */
181	/* Now that vars are all in place, clone nested closures. */
182
183	for (ix = fpad; ix > 0; ix--) {
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185	if (namesv
186	&& namesv != &PL_sv_undef
187	&& !(SvFLAGS(namesv) & SVf_FAKE)
188	&& *SvPVX(namesv) == '&'
189	&& CvCLONE(ppad[ix]))
190	{
191	CV *kid = cv_clone((CV*)ppad[ix]);
192	SvREFCNT_dec(ppad[ix]);
193	CvCLONE_on(kid);
194	SvPADMY_on(kid);
195	npad[ix] = (SV*)kid;
196	}
197	}
198	#endif
199
200	return newpadlist;
201	}
202
203	#ifdef MAY_FLUSH
204	STATIC void
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV *sv = svp ? *svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218
219	SvREFCNT_dec((SV*)padlist);
220	}
221	}
222	#endif
223
224	/* the next two functions merely cache the padlists */
225	STATIC void
226	get_padlist (CV *cv)
227	{
228	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230	if (he && AvFILLp ((AV *)*he) >= 0)
231	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232	else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234	}
235
236	STATIC void
237	put_padlist (CV *cv)
238	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241	if (SvTYPE (*he) != SVt_PVAV)
242	{
243	SvREFCNT_dec (*he);
244	*he = (SV *)newAV ();
245	}
246
247	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248	}
249
250	#ifdef MAY_FLUSH
251	STATIC void
252	flush_padlist_cache ()
253	{
254	HV *hv = padlist_cache;
255	padlist_cache = newHV ();
256
257	if (hv_iterinit (hv))
258	{
259	HE *he;
260	AV *padlist;
261
262	while (!!(he = hv_iternext (hv)))
263	{
264	AV *av = (AV *)HeVAL(he);
265
266	/* casting is fun. */
267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268	free_padlist (padlist);
269	}
270	}
271
272	SvREFCNT_dec (hv);
273	}
274	#endif
275
276	#define SB do {
277	#define SE } while (0)
278
279	#define LOAD(state) load_state(aTHX_ (state));
280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284	static void
285	load_state(pTHX_ Coro__State c)
286	{
287	PL_dowarn = c->dowarn;
288	PL_in_eval = c->in_eval;
289
290	PL_curstackinfo = c->curstackinfo;
291	PL_curstack = c->curstack;
292	PL_mainstack = c->mainstack;
293	PL_stack_sp = c->stack_sp;
294	PL_op = c->op;
295	PL_curpad = c->curpad;
296	PL_comppad = c->comppad;
297	PL_stack_base = c->stack_base;
298	PL_stack_max = c->stack_max;
299	PL_tmps_stack = c->tmps_stack;
300	PL_tmps_floor = c->tmps_floor;
301	PL_tmps_ix = c->tmps_ix;
302	PL_tmps_max = c->tmps_max;
303	PL_markstack = c->markstack;
304	PL_markstack_ptr = c->markstack_ptr;
305	PL_markstack_max = c->markstack_max;
306	PL_scopestack = c->scopestack;
307	PL_scopestack_ix = c->scopestack_ix;
308	PL_scopestack_max = c->scopestack_max;
309	PL_savestack = c->savestack;
310	PL_savestack_ix = c->savestack_ix;
311	PL_savestack_max = c->savestack_max;
312	PL_retstack = c->retstack;
313	PL_retstack_ix = c->retstack_ix;
314	PL_retstack_max = c->retstack_max;
315	PL_curcop = c->curcop;
316	PL_top_env = c->top_env;
317
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321
322	{
323	dSP;
324	CV *cv;
325
326	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))
328	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;
335	#ifdef USE_THREADS
336	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
337	#endif
338	}
339
340	++CvDEPTH(cv);
341	}
342
343	PUTBACK;
344	}
345	}
346
347	static void
348	save_state(pTHX_ Coro__State c, int flags)
349	{
350	{
351	dSP;
352	I32 cxix = cxstack_ix;
353	PERL_CONTEXT *ccstk = cxstack;
354	PERL_SI *top_si = PL_curstackinfo;
355
356	/*
357	* the worst thing you can imagine happens first - we have to save
358	* (and reinitialize) all cv's in the whole callchain :(
359	*/
360
361	PUSHs (Nullsv);
362	/* this loop was inspired by pp_caller */
363	for (;;)
364	{
365	while (cxix >= 0)
366	{
367	PERL_CONTEXT *cx = &ccstk[cxix--];
368
369	if (CxTYPE(cx) == CXt_SUB)
370	{
371	CV *cv = cx->blk_sub.cv;
372	if (CvDEPTH(cv))
373	{
374	#ifdef USE_THREADS
375	/*XPUSHs ((SV *)CvOWNER(cv));*/
376	/*CvOWNER(cv) = 0;*/
377	/*error must unlock this cv etc.. etc...*/
378	#endif
379	EXTEND (SP, CvDEPTH(cv)*2);
380
381	while (--CvDEPTH(cv))
382	{
383	/* this tells the restore code to increment CvDEPTH */
384	PUSHs (Nullsv);
385	PUSHs ((SV *)cv);
386	}
387
388	PUSHs ((SV *)CvPADLIST(cv));
389	PUSHs ((SV *)cv);
390
391	get_padlist (cv); /* this is a monster */
392	}
393	}
394	else if (CxTYPE(cx) == CXt_FORMAT)
395	{
396	/* I never used formats, so how should I know how these are implemented? */
397	/* my bold guess is as a simple, plain sub... */
398	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
399	}
400	}
401
402	if (top_si->si_type == PERLSI_MAIN)
403	break;
404
405	top_si = top_si->si_prev;
406	ccstk = top_si->si_cxstack;
407	cxix = top_si->si_cxix;
408	}
409
410	PUTBACK;
411	}
412
413	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
414	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
415	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
416
417	c->dowarn = PL_dowarn;
418	c->in_eval = PL_in_eval;
419
420	c->curstackinfo = PL_curstackinfo;
421	c->curstack = PL_curstack;
422	c->mainstack = PL_mainstack;
423	c->stack_sp = PL_stack_sp;
424	c->op = PL_op;
425	c->curpad = PL_curpad;
426	c->comppad = PL_comppad;
427	c->stack_base = PL_stack_base;
428	c->stack_max = PL_stack_max;
429	c->tmps_stack = PL_tmps_stack;
430	c->tmps_floor = PL_tmps_floor;
431	c->tmps_ix = PL_tmps_ix;
432	c->tmps_max = PL_tmps_max;
433	c->markstack = PL_markstack;
434	c->markstack_ptr = PL_markstack_ptr;
435	c->markstack_max = PL_markstack_max;
436	c->scopestack = PL_scopestack;
437	c->scopestack_ix = PL_scopestack_ix;
438	c->scopestack_max = PL_scopestack_max;
439	c->savestack = PL_savestack;
440	c->savestack_ix = PL_savestack_ix;
441	c->savestack_max = PL_savestack_max;
442	c->retstack = PL_retstack;
443	c->retstack_ix = PL_retstack_ix;
444	c->retstack_max = PL_retstack_max;
445	c->curcop = PL_curcop;
446	c->top_env = PL_top_env;
447	}
448
449	/*
450	* allocate various perl stacks. This is an exact copy
451	* of perl.c:init_stacks, except that it uses less memory
452	* on the assumption that coroutines do not usually need
453	* a lot of stackspace.
454	*/
455	STATIC void
456	coro_init_stacks (pTHX)
457	{
458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462
463	PL_stack_base = AvARRAY(PL_curstack);
464	PL_stack_sp = PL_stack_base;
465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466
467	New(50,PL_tmps_stack,96,SV*);
468	PL_tmps_floor = -1;
469	PL_tmps_ix = -1;
470	PL_tmps_max = 96;
471
472	New(54,PL_markstack,16,I32);
473	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;
475
476	SET_MARK_OFFSET;
477
478	New(54,PL_scopestack,16,I32);
479	PL_scopestack_ix = 0;
480	PL_scopestack_max = 16;
481
482	New(54,PL_savestack,96,ANY);
483	PL_savestack_ix = 0;
484	PL_savestack_max = 96;
485
486	New(54,PL_retstack,8,OP*);
487	PL_retstack_ix = 0;
488	PL_retstack_max = 8;
489	}
490
491	/*
492	* destroy the stacks, the callchain etc...
493	* still there is a memleak of 128 bytes...
494	*/
495	STATIC void
496	destroy_stacks(pTHX)
497	{
498	if (!IN_DESTRUCT)
499	{
500	/* is this ugly, I ask? */
501	while (PL_scopestack_ix)
502	LEAVE;
503
504	/* sure it is, but more important: is it correct?? :/ */
505	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
506	FREETMPS;
507	}
508
509	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;
511
512	while (PL_curstackinfo)
513	{
514	PERL_SI *p = PL_curstackinfo->si_prev;
515
516	{
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)
523	{
524	dounwind(-1);
525	SvREFCNT_dec(PL_curstackinfo->si_stack);
526	}
527
528	Safefree(PL_curstackinfo->si_cxstack);
529	Safefree(PL_curstackinfo);
530	PL_curstackinfo = p;
531	}
532
533	Safefree(PL_tmps_stack);
534	Safefree(PL_markstack);
535	Safefree(PL_scopestack);
536	Safefree(PL_savestack);
537	Safefree(PL_retstack);
538	}
539
540	static void
541	allocate_stack (Coro__State ctx, int alloc)
542	{
543	coro_stack *stack;
544
545	New (0, stack, 1, coro_stack);
546
547	stack->refcnt = 1;
548	stack->usecnt = 1;
549	stack->gencnt = ctx->gencnt = 0;
550	if (alloc)
551	{
552	#if HAVE_MMAP
553	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
554	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555	if (stack->sptr == (void *)-1)
556	#endif
557	{
558	/*FIXME*//*D*//* reasonable stack size! */
559	stack->ssize = -4096 * sizeof (long);
560	New (0, stack->sptr, 4096, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565
566	ctx->stack = stack;
567	}
568
569	static void
570	deallocate_stack (Coro__State ctx)
571	{
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{
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	#else
585	Safefree (stack->sptr);
586	#endif
587	Safefree (stack);
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}
593
594	static void
595	setup_coro (void *arg)
596	{
597	/*
598	* emulate part of the perl startup here.
599	*/
600	dSP;
601	Coro__State ctx = (Coro__State)arg;
602	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
603
604	coro_init_stacks (aTHX);
605	/*PL_curcop = 0;*/
606	/*PL_in_eval = PL_in_eval;*/ /* inherit */
607	SvREFCNT_dec (GvAV (PL_defgv));
608	GvAV (PL_defgv) = ctx->args;
609
610	SPAGAIN;
611
612	if (ctx->stack)
613	{
614	ctx->cursp = 0;
615
616	PUSHMARK(SP);
617	PUTBACK;
618	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
619
620	if (SvTRUE (ERRSV))
621	croak (NULL);
622	else
623	croak ("FATAL: CCTXT coroutine returned!");
624	}
625	else
626	{
627	UNOP myop;
628
629	PL_op = (OP *)&myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PUSHMARK(SP);
636	XPUSHs (sub_init);
637	/*
638	* the next line is slightly wrong, as PL_op->op_next
639	* is actually being executed so we skip the first op.
640	* that doesn't matter, though, since it is only
641	* pp_nextstate and we never return...
642	* ah yes, and I don't care anyways ;)
643	*/
644	PUTBACK;
645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646	SPAGAIN;
647
648	ENTER; /* necessary e.g. for dounwind */
649	}
650	}
651
652	static void
653	continue_coro (void *arg)
654	{
655	/*
656	* this is a _very_ stripped down perl interpreter ;)
657	*/
658	Coro__State ctx = (Coro__State)arg;
659	JMPENV coro_start_env;
660
661	/* same as JMPENV_BOOTSTRAP */
662	Zero(&coro_start_env, 1, JMPENV);
663	coro_start_env.je_ret = -1;
664	coro_start_env.je_mustcatch = TRUE;
665	PL_top_env = &coro_start_env;
666
667	ctx->cursp = 0;
668	PL_op = PL_op->op_next;
669	CALLRUNOPS(aTHX);
670
671	abort ();
672	}
673
674	STATIC void
675	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
676	{
677	dSTACKLEVEL;
678	static struct coro *xnext;
679
680	if (prev != next)
681	{
682	xnext = next;
683
684	if (next->mainstack)
685	{
686	SAVE (prev, flags);
687	LOAD (next);
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	/* don't add any code here */
717	}
718
719	}
720	else if (next->tmps_ix == -2)
721	croak ("tried to transfer to running coroutine");
722	else
723	{
724	SAVE (prev, -1); /* first get rid of the old state */
725
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	setup_coro (next);
734
735	prev->stack->refcnt++;
736	prev->stack->usecnt++;
737	next->stack = prev->stack;
738	next->gencnt = prev->gencnt;
739	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	/* don't add any code here */
748	}
749	}
750	else
751	setup_coro (next);
752	}
753
754	/*
755	* xnext is now either prev or next, depending on wether
756	* we switched the c stack or not. that's why I use a global
757	* variable, that should become thread-specific at one point.
758	*/
759	xnext->cursp = stacklevel;
760	}
761
762	if (coro_mortal)
763	{
764	SvREFCNT_dec (coro_mortal);
765	coro_mortal = 0;
766	}
767	}
768
769	#define SV_CORO(sv,func) \
770	do { \
771	if (SvROK (sv)) \
772	sv = SvRV (sv); \
773	\
774	if (SvTYPE(sv) == SVt_PVHV) \
775	{ \
776	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
777	\
778	if (!he) \
779	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
780	\
781	(sv) = SvRV (HeVAL(he)); \
782	} \
783	\
784	/* must also be changed inside Coro::Cont::yield */ \
785	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
786	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
787	\
788	} while(0)
789
790	#define SvSTATE(sv) (struct coro *)SvIV (sv)
791
792	static void
793	api_transfer(pTHX_ SV *prev, SV *next, int flags)
794	{
795	SV_CORO (prev, "Coro::transfer");
796	SV_CORO (next, "Coro::transfer");
797
798	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
799	}
800		248
801	/** Coro ********************************************************************/	249	/** Coro ********************************************************************/
802		250
803	#define PRIO_MAX 3	251	#define PRIO_MAX 3
804	#define PRIO_HIGH 1	252	#define PRIO_HIGH 1
…		…
806	#define PRIO_LOW -1	254	#define PRIO_LOW -1
807	#define PRIO_IDLE -3	255	#define PRIO_IDLE -3
808	#define PRIO_MIN -4	256	#define PRIO_MIN -4
809		257
810	/* for Coro.pm */	258	/* for Coro.pm */
811	static GV *coro_current, *coro_idle;	259	static SV *coro_current;
812	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;	261	static int coro_nready;
		262	static struct coro *coro_first;
814		263
815	static void	264	/** lowlevel stuff **********************************************************/
816	coro_enq (SV *sv)
817	{
818	if (SvTYPE (sv) == SVt_PVHV)
819	{
820	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
821	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
822
823	prio = prio > PRIO_MAX ? PRIO_MAX
824	: prio < PRIO_MIN ? PRIO_MIN
825	: prio;
826
827	av_push (coro_ready [prio - PRIO_MIN], sv);
828	coro_nready++;
829
830	return;
831	}
832
833	croak ("Coro::ready tried to enqueue something that is not a coroutine");
834	}
835		265
836	static SV *	266	static SV *
		267	coro_get_sv (const char *name, int create)
		268	{
		269	#if PERL_VERSION_ATLEAST (5,9,0)
		270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		271	get_sv (name, create);
		272	#endif
		273	return get_sv (name, create);
		274	}
		275
		276	static AV *
		277	coro_get_av (const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,9,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_av (name, create);
		282	#endif
		283	return get_av (name, create);
		284	}
		285
		286	static HV *
		287	coro_get_hv (const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,9,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_hv (name, create);
		292	#endif
		293	return get_hv (name, create);
		294	}
		295
		296	static AV *
		297	coro_clone_padlist (pTHX_ CV *cv)
		298	{
		299	AV *padlist = CvPADLIST (cv);
		300	AV *newpadlist, *newpad;
		301
		302	newpadlist = newAV ();
		303	AvREAL_off (newpadlist);
		304	#if PERL_VERSION_ATLEAST (5,9,0)
		305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		306	#else
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		308	#endif
		309	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		310	--AvFILLp (padlist);
		311
		312	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		313	av_store (newpadlist, 1, (SV *)newpad);
		314
		315	return newpadlist;
		316	}
		317
		318	static void
		319	free_padlist (pTHX_ AV *padlist)
		320	{
		321	/* may be during global destruction */
		322	if (SvREFCNT (padlist))
		323	{
		324	I32 i = AvFILLp (padlist);
		325	while (i >= 0)
		326	{
		327	SV **svp = av_fetch (padlist, i--, FALSE);
		328	if (svp)
		329	{
		330	SV *sv;
		331	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
		332	SvREFCNT_dec (sv);
		333
		334	SvREFCNT_dec (*svp);
		335	}
		336	}
		337
		338	SvREFCNT_dec ((SV*)padlist);
		339	}
		340	}
		341
		342	static int
		343	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		344	{
		345	AV *padlist;
		346	AV *av = (AV *)mg->mg_obj;
		347
		348	/* casting is fun. */
		349	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		350	free_padlist (aTHX_ padlist);
		351
		352	SvREFCNT_dec (av);
		353
		354	return 0;
		355	}
		356
		357	#define PERL_MAGIC_coro PERL_MAGIC_ext
		358
		359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		360
		361	#define CORO_MAGIC(cv) \
		362	SvMAGIC (cv) \
		363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		364	? SvMAGIC (cv) \
		365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		366	: 0
		367
		368	static struct coro *
		369	SvSTATE_ (pTHX_ SV *coro)
		370	{
		371	HV *stash;
		372	MAGIC *mg;
		373
		374	if (SvROK (coro))
		375	coro = SvRV (coro);
		376
		377	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		378	croak ("Coro::State object required");
		379
		380	stash = SvSTASH (coro);
		381	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		382	{
		383	/* very slow, but rare, check */
		384	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		385	croak ("Coro::State object required");
		386	}
		387
		388	mg = CORO_MAGIC (coro);
		389	return (struct coro *)mg->mg_ptr;
		390	}
		391
		392	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		393
		394	/* the next two functions merely cache the padlists */
		395	static void
		396	get_padlist (pTHX_ CV *cv)
		397	{
		398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
		400
		401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
		402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		403	else
		404	{
		405	#if CORO_PREFER_PERL_FUNCTIONS
		406	/* this is probably cleaner, but also slower? */
		407	CV *cp = Perl_cv_clone (cv);
		408	CvPADLIST (cv) = CvPADLIST (cp);
		409	CvPADLIST (cp) = 0;
		410	SvREFCNT_dec (cp);
		411	#else
		412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		413	#endif
		414	}
		415	}
		416
		417	static void
		418	put_padlist (pTHX_ CV *cv)
		419	{
		420	MAGIC *mg = CORO_MAGIC (cv);
		421	AV *av;
		422
		423	if (expect_false (!mg))
		424	{
		425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		427	mg->mg_virtual = &vtbl_coro;
		428	mg->mg_obj = (SV *)newAV ();
		429	}
		430
		431	av = (AV *)mg->mg_obj;
		432
		433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		434	av_extend (av, AvMAX (av) + 1);
		435
		436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		437	}
		438
		439	/** load & save, init *******************************************************/
		440
		441	static void
		442	load_perl (pTHX_ Coro__State c)
		443	{
		444	perl_slots *slot = c->slot;
		445	c->slot = 0;
		446
		447	PL_mainstack = c->mainstack;
		448
		449	GvSV (PL_defgv) = slot->defsv;
		450	GvAV (PL_defgv) = slot->defav;
		451	GvSV (PL_errgv) = slot->errsv;
		452	GvSV (irsgv) = slot->irsgv;
		453
		454	#define VAR(name,type) PL_ ## name = slot->name;
		455	# include "state.h"
		456	#undef VAR
		457
		458	{
		459	dSP;
		460
		461	CV *cv;
		462
		463	/* now do the ugly restore mess */
		464	while (expect_true (cv = (CV *)POPs))
		465	{
		466	put_padlist (aTHX_ cv); /* mark this padlist as available */
		467	CvDEPTH (cv) = PTR2IV (POPs);
		468	CvPADLIST (cv) = (AV *)POPs;
		469	}
		470
		471	PUTBACK;
		472	}
		473	}
		474
		475	static void
		476	save_perl (pTHX_ Coro__State c)
		477	{
		478	{
		479	dSP;
		480	I32 cxix = cxstack_ix;
		481	PERL_CONTEXT *ccstk = cxstack;
		482	PERL_SI *top_si = PL_curstackinfo;
		483
		484	/*
		485	* the worst thing you can imagine happens first - we have to save
		486	* (and reinitialize) all cv's in the whole callchain :(
		487	*/
		488
		489	XPUSHs (Nullsv);
		490	/* this loop was inspired by pp_caller */
		491	for (;;)
		492	{
		493	while (expect_true (cxix >= 0))
		494	{
		495	PERL_CONTEXT *cx = &ccstk[cxix--];
		496
		497	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
		498	{
		499	CV *cv = cx->blk_sub.cv;
		500
		501	if (expect_true (CvDEPTH (cv)))
		502	{
		503	EXTEND (SP, 3);
		504	PUSHs ((SV *)CvPADLIST (cv));
		505	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
		506	PUSHs ((SV *)cv);
		507
		508	CvDEPTH (cv) = 0;
		509	get_padlist (aTHX_ cv);
		510	}
		511	}
		512	}
		513
		514	if (expect_true (top_si->si_type == PERLSI_MAIN))
		515	break;
		516
		517	top_si = top_si->si_prev;
		518	ccstk = top_si->si_cxstack;
		519	cxix = top_si->si_cxix;
		520	}
		521
		522	PUTBACK;
		523	}
		524
		525	/* allocate some space on the context stack for our purposes */
		526	{
		527	/* we manually unroll here, as usually 2 slots is enough */
		528	int i;
		529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	for (i = 3; i < SLOT_COUNT; ++i)
		533	CXINC;
		534
		535	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		536	}
		537
		538	c->mainstack = PL_mainstack;
		539
		540	{
		541	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		542
		543	slot->defav = GvAV (PL_defgv);
		544	slot->defsv = DEFSV;
		545	slot->errsv = ERRSV;
		546	slot->irsgv = GvSV (irsgv);
		547
		548	#define VAR(name,type) slot->name = PL_ ## name;
		549	# include "state.h"
		550	#undef VAR
		551	}
		552	}
		553
		554	/*
		555	* allocate various perl stacks. This is an exact copy
		556	* of perl.c:init_stacks, except that it uses less memory
		557	* on the (sometimes correct) assumption that coroutines do
		558	* not usually need a lot of stackspace.
		559	*/
		560	#if CORO_PREFER_PERL_FUNCTIONS
		561	# define coro_init_stacks init_stacks
		562	#else
		563	static void
		564	coro_init_stacks (pTHX)
		565	{
		566	PL_curstackinfo = new_stackinfo(32, 8);
		567	PL_curstackinfo->si_type = PERLSI_MAIN;
		568	PL_curstack = PL_curstackinfo->si_stack;
		569	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		570
		571	PL_stack_base = AvARRAY(PL_curstack);
		572	PL_stack_sp = PL_stack_base;
		573	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		574
		575	New(50,PL_tmps_stack,32,SV*);
		576	PL_tmps_floor = -1;
		577	PL_tmps_ix = -1;
		578	PL_tmps_max = 32;
		579
		580	New(54,PL_markstack,16,I32);
		581	PL_markstack_ptr = PL_markstack;
		582	PL_markstack_max = PL_markstack + 16;
		583
		584	#ifdef SET_MARK_OFFSET
		585	SET_MARK_OFFSET;
		586	#endif
		587
		588	New(54,PL_scopestack,8,I32);
		589	PL_scopestack_ix = 0;
		590	PL_scopestack_max = 8;
		591
		592	New(54,PL_savestack,24,ANY);
		593	PL_savestack_ix = 0;
		594	PL_savestack_max = 24;
		595
		596	#if !PERL_VERSION_ATLEAST (5,9,0)
		597	New(54,PL_retstack,4,OP*);
		598	PL_retstack_ix = 0;
		599	PL_retstack_max = 4;
		600	#endif
		601	}
		602	#endif
		603
		604	/*
		605	* destroy the stacks, the callchain etc...
		606	*/
		607	static void
		608	coro_destroy_stacks (pTHX)
		609	{
		610	while (PL_curstackinfo->si_next)
		611	PL_curstackinfo = PL_curstackinfo->si_next;
		612
		613	while (PL_curstackinfo)
		614	{
		615	PERL_SI *p = PL_curstackinfo->si_prev;
		616
		617	if (!IN_DESTRUCT)
		618	SvREFCNT_dec (PL_curstackinfo->si_stack);
		619
		620	Safefree (PL_curstackinfo->si_cxstack);
		621	Safefree (PL_curstackinfo);
		622	PL_curstackinfo = p;
		623	}
		624
		625	Safefree (PL_tmps_stack);
		626	Safefree (PL_markstack);
		627	Safefree (PL_scopestack);
		628	Safefree (PL_savestack);
		629	#if !PERL_VERSION_ATLEAST (5,9,0)
		630	Safefree (PL_retstack);
		631	#endif
		632	}
		633
		634	static size_t
		635	coro_rss (pTHX_ struct coro *coro)
		636	{
		637	size_t rss = sizeof (*coro);
		638
		639	if (coro->mainstack)
		640	{
		641	perl_slots tmp_slot;
		642	perl_slots *slot;
		643
		644	if (coro->flags & CF_RUNNING)
		645	{
		646	slot = &tmp_slot;
		647
		648	#define VAR(name,type) slot->name = PL_ ## name;
		649	# include "state.h"
		650	#undef VAR
		651	}
		652	else
		653	slot = coro->slot;
		654
		655	rss += sizeof (slot->curstackinfo);
		656	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		657	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		658	rss += slot->tmps_max * sizeof (SV *);
		659	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		660	rss += slot->scopestack_max * sizeof (I32);
		661	rss += slot->savestack_max * sizeof (ANY);
		662
		663	#if !PERL_VERSION_ATLEAST (5,9,0)
		664	rss += slot->retstack_max * sizeof (OP *);
		665	#endif
		666	}
		667
		668	return rss;
		669	}
		670
		671	/** coroutine stack handling ************************************************/
		672
		673	static void
		674	coro_setup (pTHX_ struct coro *coro)
		675	{
		676	/*
		677	* emulate part of the perl startup here.
		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	SvREFCNT_inc (PL_diehook ); hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		691	SvREFCNT_inc (PL_warnhook); hv_store (hv_sig, strpair ("__WARN__"), 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	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		717	}
		718
		719	static void
		720	coro_destroy (pTHX_ struct coro *coro)
		721	{
		722	if (!IN_DESTRUCT)
		723	{
		724	/* restore all saved variables and stuff */
		725	LEAVE_SCOPE (0);
		726	assert (PL_tmps_floor == -1);
		727
		728	/* free all temporaries */
		729	FREETMPS;
		730	assert (PL_tmps_ix == -1);
		731
		732	/* unwind all extra stacks */
		733	POPSTACK_TO (PL_mainstack);
		734
		735	/* unwind main stack */
		736	dounwind (-1);
		737	}
		738
		739	SvREFCNT_dec (GvSV (PL_defgv));
		740	SvREFCNT_dec (GvAV (PL_defgv));
		741	SvREFCNT_dec (GvSV (PL_errgv));
		742	SvREFCNT_dec (PL_defoutgv);
		743	SvREFCNT_dec (PL_rs);
		744	SvREFCNT_dec (GvSV (irsgv));
		745
		746	SvREFCNT_dec (PL_diehook);
		747	SvREFCNT_dec (PL_warnhook);
		748
		749	SvREFCNT_dec (coro->saved_deffh);
		750	SvREFCNT_dec (coro->throw);
		751
		752	coro_destroy_stacks (aTHX);
		753	}
		754
		755	static void
		756	free_coro_mortal (pTHX)
		757	{
		758	if (expect_true (coro_mortal))
		759	{
		760	SvREFCNT_dec (coro_mortal);
		761	coro_mortal = 0;
		762	}
		763	}
		764
		765	static int
		766	runops_trace (pTHX)
		767	{
		768	COP *oldcop = 0;
		769	int oldcxix = -2;
		770	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		771	coro_cctx *cctx = coro->cctx;
		772
		773	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		774	{
		775	PERL_ASYNC_CHECK ();
		776
		777	if (cctx->flags & CC_TRACE_ALL)
		778	{
		779	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		780	{
		781	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		782	SV **bot, **top;
		783	AV *av = newAV (); /* return values */
		784	SV **cb;
		785	dSP;
		786
		787	GV *gv = CvGV (cx->blk_sub.cv);
		788	SV *fullname = sv_2mortal (newSV (0));
		789	if (isGV (gv))
		790	gv_efullname3 (fullname, gv, 0);
		791
		792	bot = PL_stack_base + cx->blk_oldsp + 1;
		793	top = cx->blk_gimme == G_ARRAY ? SP + 1
		794	: cx->blk_gimme == G_SCALAR ? bot + 1
		795	: bot;
		796
		797	av_extend (av, top - bot);
		798	while (bot < top)
		799	av_push (av, SvREFCNT_inc (*bot++));
		800
		801	PL_runops = RUNOPS_DEFAULT;
		802	ENTER;
		803	SAVETMPS;
		804	EXTEND (SP, 3);
		805	PUSHMARK (SP);
		806	PUSHs (&PL_sv_no);
		807	PUSHs (fullname);
		808	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		809	PUTBACK;
		810	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		811	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		812	SPAGAIN;
		813	FREETMPS;
		814	LEAVE;
		815	PL_runops = runops_trace;
		816	}
		817
		818	if (oldcop != PL_curcop)
		819	{
		820	oldcop = PL_curcop;
		821
		822	if (PL_curcop != &PL_compiling)
		823	{
		824	SV **cb;
		825
		826	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		827	{
		828	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		829
		830	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		831	{
		832	runops_proc_t old_runops = PL_runops;
		833	dSP;
		834	GV *gv = CvGV (cx->blk_sub.cv);
		835	SV *fullname = sv_2mortal (newSV (0));
		836
		837	if (isGV (gv))
		838	gv_efullname3 (fullname, gv, 0);
		839
		840	PL_runops = RUNOPS_DEFAULT;
		841	ENTER;
		842	SAVETMPS;
		843	EXTEND (SP, 3);
		844	PUSHMARK (SP);
		845	PUSHs (&PL_sv_yes);
		846	PUSHs (fullname);
		847	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		848	PUTBACK;
		849	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		850	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		851	SPAGAIN;
		852	FREETMPS;
		853	LEAVE;
		854	PL_runops = runops_trace;
		855	}
		856
		857	oldcxix = cxstack_ix;
		858	}
		859
		860	if (cctx->flags & CC_TRACE_LINE)
		861	{
		862	dSP;
		863
		864	PL_runops = RUNOPS_DEFAULT;
		865	ENTER;
		866	SAVETMPS;
		867	EXTEND (SP, 3);
		868	PL_runops = RUNOPS_DEFAULT;
		869	PUSHMARK (SP);
		870	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		871	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		872	PUTBACK;
		873	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		874	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		875	SPAGAIN;
		876	FREETMPS;
		877	LEAVE;
		878	PL_runops = runops_trace;
		879	}
		880	}
		881	}
		882	}
		883	}
		884
		885	TAINT_NOT;
		886	return 0;
		887	}
		888
		889	/* inject a fake call to Coro::State::_cctx_init into the execution */
		890	/* _cctx_init should be careful, as it could be called at almost any time */
		891	/* during execution of a perl program */
		892	static void NOINLINE
		893	prepare_cctx (pTHX_ coro_cctx *cctx)
		894	{
		895	dSP;
		896	LOGOP myop;
		897
		898	PL_top_env = &PL_start_env;
		899
		900	if (cctx->flags & CC_TRACE)
		901	PL_runops = runops_trace;
		902
		903	Zero (&myop, 1, LOGOP);
		904	myop.op_next = PL_op;
		905	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		906
		907	PUSHMARK (SP);
		908	EXTEND (SP, 2);
		909	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		910	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		911	PUTBACK;
		912	PL_op = (OP *)&myop;
		913	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		914	SPAGAIN;
		915	}
		916
		917	/*
		918	* this is a _very_ stripped down perl interpreter ;)
		919	*/
		920	static void
		921	coro_run (void *arg)
		922	{
		923	dTHX;
		924
		925	/* coro_run is the alternative tail of transfer(), so unlock here. */
		926	UNLOCK;
		927
		928	/* we now skip the entersub that lead to transfer() */
		929	PL_op = PL_op->op_next;
		930
		931	/* inject a fake subroutine call to cctx_init */
		932	prepare_cctx (aTHX_ (coro_cctx *)arg);
		933
		934	/* somebody or something will hit me for both perl_run and PL_restartop */
		935	PL_restartop = PL_op;
		936	perl_run (PL_curinterp);
		937
		938	/*
		939	* If perl-run returns we assume exit() was being called or the coro
		940	* fell off the end, which seems to be the only valid (non-bug)
		941	* reason for perl_run to return. We try to exit by jumping to the
		942	* bootstrap-time "top" top_env, as we cannot restore the "main"
		943	* coroutine as Coro has no such concept
		944	*/
		945	PL_top_env = main_top_env;
		946	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		947	}
		948
		949	static coro_cctx *
		950	cctx_new ()
		951	{
		952	coro_cctx *cctx;
		953	void *stack_start;
		954	size_t stack_size;
		955
		956	++cctx_count;
		957
		958	Newz (0, cctx, 1, coro_cctx);
		959
		960	#if HAVE_MMAP
		961
		962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		963	/* mmap supposedly does allocate-on-write for us */
		964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		965
		966	if (cctx->sptr != (void *)-1)
		967	{
		968	# if CORO_STACKGUARD
		969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags |= CC_MAPPED;
		974	}
		975	else
		976	#endif
		977	{
		978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
		980
		981	if (!cctx->sptr)
		982	{
		983	perror ("FATAL: unable to allocate stack for coroutine");
		984	_exit (EXIT_FAILURE);
		985	}
		986
		987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
		990
		991	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		992	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		993
		994	return cctx;
		995	}
		996
		997	static void
		998	cctx_destroy (coro_cctx *cctx)
		999	{
		1000	if (!cctx)
		1001	return;
		1002
		1003	--cctx_count;
		1004
		1005	#if CORO_USE_VALGRIND
		1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1007	#endif
		1008
		1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
		1011	munmap (cctx->sptr, cctx->ssize);
		1012	else
		1013	#endif
		1014	Safefree (cctx->sptr);
		1015
		1016	Safefree (cctx);
		1017	}
		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1021
		1022	static coro_cctx *
		1023	cctx_get (pTHX)
		1024	{
		1025	while (expect_true (cctx_first))
		1026	{
		1027	coro_cctx *cctx = cctx_first;
		1028	cctx_first = cctx->next;
		1029	--cctx_idle;
		1030
		1031	if (expect_true (!CCTX_EXPIRED (cctx)))
		1032	return cctx;
		1033
		1034	cctx_destroy (cctx);
		1035	}
		1036
		1037	return cctx_new ();
		1038	}
		1039
		1040	static void
		1041	cctx_put (coro_cctx *cctx)
		1042	{
		1043	/* free another cctx if overlimit */
		1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1045	{
		1046	coro_cctx *first = cctx_first;
		1047	cctx_first = first->next;
		1048	--cctx_idle;
		1049
		1050	cctx_destroy (first);
		1051	}
		1052
		1053	++cctx_idle;
		1054	cctx->next = cctx_first;
		1055	cctx_first = cctx;
		1056	}
		1057
		1058	/** coroutine switching *****************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
		1077	#else
		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
		1079	#endif
		1080	)
		1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1082	}
		1083	}
		1084
		1085	/* always use the TRANSFER macro */
		1086	static void NOINLINE
		1087	transfer (pTHX_ struct coro *prev, struct coro *next)
		1088	{
		1089	dSTACKLEVEL;
		1090
		1091	/* sometimes transfer is only called to set idle_sp */
		1092	if (expect_false (!next))
		1093	{
		1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1095	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1096	}
		1097	else if (expect_true (prev != next))
		1098	{
		1099	coro_cctx *prev__cctx;
		1100
		1101	if (expect_false (prev->flags & CF_NEW))
		1102	{
		1103	/* create a new empty context */
		1104	Newz (0, prev->cctx, 1, coro_cctx);
		1105	prev->flags &= ~CF_NEW;
		1106	prev->flags |= CF_RUNNING;
		1107	}
		1108
		1109	prev->flags &= ~CF_RUNNING;
		1110	next->flags |= CF_RUNNING;
		1111
		1112	LOCK;
		1113
		1114	if (expect_false (next->flags & CF_NEW))
		1115	{
		1116	/* need to start coroutine */
		1117	next->flags &= ~CF_NEW;
		1118	/* first get rid of the old state */
		1119	save_perl (aTHX_ prev);
		1120	/* setup coroutine call */
		1121	coro_setup (aTHX_ next);
		1122	}
		1123	else
		1124	{
		1125	/* coroutine already started */
		1126	save_perl (aTHX_ prev);
		1127	load_perl (aTHX_ next);
		1128	}
		1129
		1130	prev__cctx = prev->cctx;
		1131
		1132	/* possibly "free" the cctx */
		1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1134	{
		1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1137
		1138	prev->cctx = 0;
		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	next->cctx = cctx_get (aTHX);
		1144
		1145	cctx_put (prev__cctx);
		1146	}
		1147
		1148	++next->usecount;
		1149
		1150	if (expect_true (!next->cctx))
		1151	next->cctx = cctx_get (aTHX);
		1152
		1153	if (expect_false (prev__cctx != next->cctx))
		1154	{
		1155	prev__cctx->top_env = PL_top_env;
		1156	PL_top_env = next->cctx->top_env;
		1157	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1158	}
		1159
		1160	free_coro_mortal (aTHX);
		1161	UNLOCK;
		1162
		1163	if (expect_false (prev->throw || next->throw))
		1164	{
		1165	struct coro *coro = SvSTATE (coro_current);
		1166
		1167	if (coro->throw)
		1168	{
		1169	SV *exception = coro->throw;
		1170	coro->throw = 0;
		1171	sv_setsv (ERRSV, exception);
		1172	croak (0);
		1173	}
		1174	}
		1175	}
		1176	}
		1177
		1178	struct transfer_args
		1179	{
		1180	struct coro *prev, *next;
		1181	};
		1182
		1183	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1184	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1185
		1186	/** high level stuff ********************************************************/
		1187
		1188	static int
		1189	coro_state_destroy (pTHX_ struct coro *coro)
		1190	{
		1191	if (coro->flags & CF_DESTROYED)
		1192	return 0;
		1193
		1194	coro->flags |= CF_DESTROYED;
		1195
		1196	if (coro->flags & CF_READY)
		1197	{
		1198	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1199	/* alternative: look through all ready queues and remove the coro */
		1200	LOCK;
		1201	--coro_nready;
		1202	UNLOCK;
		1203	}
		1204	else
		1205	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1206
		1207	if (coro->mainstack && coro->mainstack != main_mainstack)
		1208	{
		1209	struct coro temp;
		1210
		1211	if (coro->flags & CF_RUNNING)
		1212	croak ("FATAL: tried to destroy currently running coroutine");
		1213
		1214	save_perl (aTHX_ &temp);
		1215	load_perl (aTHX_ coro);
		1216
		1217	coro_destroy (aTHX_ coro);
		1218
		1219	load_perl (aTHX_ &temp);
		1220
		1221	coro->slot = 0;
		1222	}
		1223
		1224	cctx_destroy (coro->cctx);
		1225	SvREFCNT_dec (coro->args);
		1226
		1227	if (coro->next) coro->next->prev = coro->prev;
		1228	if (coro->prev) coro->prev->next = coro->next;
		1229	if (coro == coro_first) coro_first = coro->next;
		1230
		1231	return 1;
		1232	}
		1233
		1234	static int
		1235	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1236	{
		1237	struct coro *coro = (struct coro *)mg->mg_ptr;
		1238	mg->mg_ptr = 0;
		1239
		1240	coro->hv = 0;
		1241
		1242	if (--coro->refcnt < 0)
		1243	{
		1244	coro_state_destroy (aTHX_ coro);
		1245	Safefree (coro);
		1246	}
		1247
		1248	return 0;
		1249	}
		1250
		1251	static int
		1252	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1253	{
		1254	struct coro *coro = (struct coro *)mg->mg_ptr;
		1255
		1256	++coro->refcnt;
		1257
		1258	return 0;
		1259	}
		1260
		1261	static MGVTBL coro_state_vtbl = {
		1262	0, 0, 0, 0,
		1263	coro_state_free,
		1264	0,
		1265	#ifdef MGf_DUP
		1266	coro_state_dup,
		1267	#else
		1268	# define MGf_DUP 0
		1269	#endif
		1270	};
		1271
		1272	static void
		1273	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1274	{
		1275	ta->prev = SvSTATE (prev_sv);
		1276	ta->next = SvSTATE (next_sv);
		1277	TRANSFER_CHECK (*ta);
		1278	}
		1279
		1280	static void
		1281	api_transfer (SV *prev_sv, SV *next_sv)
		1282	{
		1283	dTHX;
		1284	struct transfer_args ta;
		1285
		1286	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1287	TRANSFER (ta);
		1288	}
		1289
		1290	/** Coro ********************************************************************/
		1291
		1292	static void
		1293	coro_enq (pTHX_ SV *coro_sv)
		1294	{
		1295	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1296	}
		1297
		1298	static SV *
837	coro_deq (int min_prio)	1299	coro_deq (pTHX_ int min_prio)
838	{	1300	{
839	int prio = PRIO_MAX - PRIO_MIN;	1301	int prio = PRIO_MAX - PRIO_MIN;
840		1302
841	min_prio -= PRIO_MIN;	1303	min_prio -= PRIO_MIN;
842	if (min_prio < 0)	1304	if (min_prio < 0)
843	min_prio = 0;	1305	min_prio = 0;
844		1306
845	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1307	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
846	if (av_len (coro_ready[prio]) >= 0)	1308	if (AvFILLp (coro_ready [prio]) >= 0)
847	{
848	coro_nready--;
849	return av_shift (coro_ready[prio]);	1309	return av_shift (coro_ready [prio]);
850	}
851		1310
852	return 0;	1311	return 0;
853	}	1312	}
854		1313
855	static void	1314	static int
856	api_ready (SV *coro)	1315	api_ready (SV *coro_sv)
857	{	1316	{
		1317	dTHX;
		1318	struct coro *coro;
		1319
858	if (SvROK (coro))	1320	if (SvROK (coro_sv))
859	coro = SvRV (coro);	1321	coro_sv = SvRV (coro_sv);
860		1322
		1323	coro = SvSTATE (coro_sv);
		1324
		1325	if (coro->flags & CF_READY)
		1326	return 0;
		1327
		1328	coro->flags |= CF_READY;
		1329
		1330	LOCK;
861	coro_enq (SvREFCNT_inc (coro));	1331	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1332	++coro_nready;
		1333	UNLOCK;
		1334
		1335	return 1;
		1336	}
		1337
		1338	static int
		1339	api_is_ready (SV *coro_sv)
		1340	{
		1341	dTHX;
		1342	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1343	}
		1344
		1345	static void
		1346	prepare_schedule (pTHX_ struct transfer_args *ta)
		1347	{
		1348	SV *prev_sv, *next_sv;
		1349
		1350	for (;;)
		1351	{
		1352	LOCK;
		1353	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1354
		1355	/* nothing to schedule: call the idle handler */
		1356	if (expect_false (!next_sv))
		1357	{
		1358	dSP;
		1359	UNLOCK;
		1360
		1361	ENTER;
		1362	SAVETMPS;
		1363
		1364	PUSHMARK (SP);
		1365	PUTBACK;
		1366	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1367
		1368	FREETMPS;
		1369	LEAVE;
		1370	continue;
		1371	}
		1372
		1373	ta->next = SvSTATE (next_sv);
		1374
		1375	/* cannot transfer to destroyed coros, skip and look for next */
		1376	if (expect_false (ta->next->flags & CF_DESTROYED))
		1377	{
		1378	UNLOCK;
		1379	SvREFCNT_dec (next_sv);
		1380	/* coro_nready is already taken care of by destroy */
		1381	continue;
		1382	}
		1383
		1384	--coro_nready;
		1385	UNLOCK;
		1386	break;
		1387	}
		1388
		1389	/* free this only after the transfer */
		1390	prev_sv = SvRV (coro_current);
		1391	ta->prev = SvSTATE (prev_sv);
		1392	TRANSFER_CHECK (*ta);
		1393	assert (ta->next->flags & CF_READY);
		1394	ta->next->flags &= ~CF_READY;
		1395	SvRV_set (coro_current, next_sv);
		1396
		1397	LOCK;
		1398	free_coro_mortal (aTHX);
		1399	coro_mortal = prev_sv;
		1400	UNLOCK;
		1401	}
		1402
		1403	static void
		1404	prepare_cede (pTHX_ struct transfer_args *ta)
		1405	{
		1406	api_ready (coro_current);
		1407	prepare_schedule (aTHX_ ta);
		1408	}
		1409
		1410	static int
		1411	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1412	{
		1413	if (coro_nready)
		1414	{
		1415	SV *prev = SvRV (coro_current);
		1416	prepare_schedule (aTHX_ ta);
		1417	api_ready (prev);
		1418	return 1;
		1419	}
		1420	else
		1421	return 0;
862	}	1422	}
863		1423
864	static void	1424	static void
865	api_schedule (void)	1425	api_schedule (void)
866	{	1426	{
867	SV *prev, *next;	1427	dTHX;
		1428	struct transfer_args ta;
868		1429
869	prev = SvRV (GvSV (coro_current));	1430	prepare_schedule (aTHX_ &ta);
870	next = coro_deq (PRIO_MIN);	1431	TRANSFER (ta);
871
872	if (!next)
873	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
874
875	/* free this only after the transfer */
876	coro_mortal = prev;
877	SV_CORO (prev, "Coro::schedule");
878
879	SvRV (GvSV (coro_current)) = next;
880
881	SV_CORO (next, "Coro::schedule");
882
883	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
884	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
885	}	1432	}
886		1433
887	static void	1434	static int
888	api_cede (void)	1435	api_cede (void)
889	{	1436	{
890	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1437	dTHX;
		1438	struct transfer_args ta;
891		1439
892	api_schedule ();	1440	prepare_cede (aTHX_ &ta);
893	}
894		1441
		1442	if (expect_true (ta.prev != ta.next))
		1443	{
		1444	TRANSFER (ta);
		1445	return 1;
		1446	}
		1447	else
		1448	return 0;
		1449	}
		1450
		1451	static int
		1452	api_cede_notself (void)
		1453	{
		1454	dTHX;
		1455	struct transfer_args ta;
		1456
		1457	if (prepare_cede_notself (aTHX_ &ta))
		1458	{
		1459	TRANSFER (ta);
		1460	return 1;
		1461	}
		1462	else
		1463	return 0;
		1464	}
		1465
		1466	static void
		1467	api_trace (SV *coro_sv, int flags)
		1468	{
		1469	dTHX;
		1470	struct coro *coro = SvSTATE (coro_sv);
		1471
		1472	if (flags & CC_TRACE)
		1473	{
		1474	if (!coro->cctx)
		1475	coro->cctx = cctx_new ();
		1476	else if (!(coro->cctx->flags & CC_TRACE))
		1477	croak ("cannot enable tracing on coroutine with custom stack");
		1478
		1479	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1480	}
		1481	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1482	{
		1483	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1484
		1485	if (coro->flags & CF_RUNNING)
		1486	PL_runops = RUNOPS_DEFAULT;
		1487	else
		1488	coro->slot->runops = RUNOPS_DEFAULT;
		1489	}
		1490	}
		1491
895	MODULE = Coro::State PACKAGE = Coro::State	1492	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
896		1493
897	PROTOTYPES: ENABLE	1494	PROTOTYPES: DISABLE
898		1495
899	BOOT:	1496	BOOT:
900	{ /* {} necessary for stoopid perl-5.6.x */	1497	{
901	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1498	#ifdef USE_ITHREADS
902	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1499	MUTEX_INIT (&coro_mutex);
		1500	#endif
		1501	BOOT_PAGESIZE;
		1502
		1503	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1504	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1505
		1506	hv_sig = coro_get_hv ("SIG", TRUE);
		1507	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1508	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1509
		1510	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1511	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1512
903	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1513	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
904		1514
905	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1515	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
906	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
907	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
908	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
909
910	if (!padlist_cache)
911	padlist_cache = newHV ();
912		1519
913	main_mainstack = PL_mainstack;	1520	main_mainstack = PL_mainstack;
		1521	main_top_env = PL_top_env;
		1522
		1523	while (main_top_env->je_prev)
		1524	main_top_env = main_top_env->je_prev;
914		1525
915	coroapi.ver = CORO_API_VERSION;	1526	coroapi.ver = CORO_API_VERSION;
916	coroapi.transfer = api_transfer;	1527	coroapi.transfer = api_transfer;
917	}
918		1528
919	Coro::State	1529	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920	_newprocess(args)	1530	}
921	SV * args	1531
922	PROTOTYPE: $	1532	SV *
		1533	new (char *klass, ...)
923	CODE:	1534	CODE:
924	Coro__State coro;	1535	{
		1536	struct coro *coro;
		1537	HV *hv;
		1538	int i;
925		1539
926	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
927	croak ("Coro::State::_newprocess expects an arrayref");
928
929	New (0, coro, 1, struct coro);	1540	Newz (0, coro, 1, struct coro);
		1541	coro->args = newAV ();
		1542	coro->flags = CF_NEW;
930		1543
931	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1544	if (coro_first) coro_first->prev = coro;
932	coro->mainstack = 0; /* actual work is done inside transfer */	1545	coro->next = coro_first;
933	coro->stack = 0;	1546	coro_first = coro;
934		1547
935	RETVAL = coro;	1548	coro->hv = hv = newHV ();
		1549	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1550	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1551
		1552	av_extend (coro->args, items - 1);
		1553	for (i = 1; i < items; i++)
		1554	av_push (coro->args, newSVsv (ST (i)));
		1555	}
936	OUTPUT:	1556	OUTPUT:
937	RETVAL	1557	RETVAL
938		1558
		1559	# these not obviously related functions are all rolled into the same xs
		1560	# function to increase chances that they all will call transfer with the same
		1561	# stack offset
939	void	1562	void
940	transfer(prev, next, flags)	1563	_set_stacklevel (...)
941	SV *prev	1564	ALIAS:
942	SV *next	1565	Coro::State::transfer = 1
943	int flags	1566	Coro::schedule = 2
944	PROTOTYPE: @	1567	Coro::cede = 3
		1568	Coro::cede_notself = 4
945	CODE:	1569	CODE:
946	PUTBACK;	1570	{
947	SV_CORO (next, "Coro::transfer");	1571	struct transfer_args ta;
948	SV_CORO (prev, "Coro::transfer");	1572
949	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1573	switch (ix)
950	SPAGAIN;	1574	{
		1575	case 0:
		1576	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1577	ta.next = 0;
		1578	break;
		1579
		1580	case 1:
		1581	if (items != 2)
		1582	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1583
		1584	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1585	break;
		1586
		1587	case 2:
		1588	prepare_schedule (aTHX_ &ta);
		1589	break;
		1590
		1591	case 3:
		1592	prepare_cede (aTHX_ &ta);
		1593	break;
		1594
		1595	case 4:
		1596	if (!prepare_cede_notself (aTHX_ &ta))
		1597	XSRETURN_EMPTY;
		1598
		1599	break;
		1600	}
		1601
		1602	BARRIER;
		1603	TRANSFER (ta);
		1604
		1605	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1606	XSRETURN_YES;
		1607	}
		1608
		1609	bool
		1610	_destroy (SV *coro_sv)
		1611	CODE:
		1612	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1613	OUTPUT:
		1614	RETVAL
951		1615
952	void	1616	void
953	DESTROY(coro)
954	Coro::State coro
955	CODE:
956
957	if (coro->mainstack && coro->mainstack != main_mainstack)
958	{
959	struct coro temp;
960
961	PUTBACK;
962	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
963	LOAD(aTHX_ coro);
964	SPAGAIN;
965
966	destroy_stacks (aTHX);
967
968	LOAD((&temp)); /* this will get rid of defsv etc.. */
969	SPAGAIN;
970
971	coro->mainstack = 0;
972	}
973
974	deallocate_stack (coro);
975
976	Safefree (coro);
977
978	void
979	flush()
980	CODE:
981	#ifdef MAY_FLUSH
982	flush_padlist_cache ();
983	#endif
984
985	void
986	_exit(code)	1617	_exit (code)
987	int code	1618	int code
988	PROTOTYPE: $	1619	PROTOTYPE: $
989	CODE:	1620	CODE:
990	#if defined(__GLIBC__) || _POSIX_C_SOURCE
991	_exit (code);	1621	_exit (code);
992	#else
993	signal (SIGTERM, SIG_DFL);
994	raise (SIGTERM);
995	exit (code);
996	#endif
997		1622
998	MODULE = Coro::State PACKAGE = Coro::Cont	1623	int
		1624	cctx_stacksize (int new_stacksize = 0)
		1625	CODE:
		1626	RETVAL = coro_stacksize;
		1627	if (new_stacksize)
		1628	coro_stacksize = new_stacksize;
		1629	OUTPUT:
		1630	RETVAL
999		1631
1000	# this is slightly dirty (should expose a c-level api)	1632	int
		1633	cctx_count ()
		1634	CODE:
		1635	RETVAL = cctx_count;
		1636	OUTPUT:
		1637	RETVAL
		1638
		1639	int
		1640	cctx_idle ()
		1641	CODE:
		1642	RETVAL = cctx_idle;
		1643	OUTPUT:
		1644	RETVAL
1001		1645
1002	void	1646	void
1003	yield(...)	1647	list ()
1004	PROTOTYPE: @	1648	PPCODE:
		1649	{
		1650	struct coro *coro;
		1651	for (coro = coro_first; coro; coro = coro->next)
		1652	if (coro->hv)
		1653	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1654	}
		1655
		1656	void
		1657	call (Coro::State coro, SV *coderef)
		1658	ALIAS:
		1659	eval = 1
		1660	CODE:
		1661	{
		1662	if (coro->mainstack)
		1663	{
		1664	struct coro temp;
		1665
		1666	if (!(coro->flags & CF_RUNNING))
		1667	{
		1668	save_perl (aTHX_ &temp);
		1669	load_perl (aTHX_ coro);
		1670	}
		1671
		1672	{
		1673	dSP;
		1674	ENTER;
		1675	SAVETMPS;
		1676	PUSHMARK (SP);
		1677	PUTBACK;
		1678
		1679	if (ix)
		1680	eval_sv (coderef, 0);
		1681	else
		1682	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1683
		1684	SPAGAIN;
		1685	FREETMPS;
		1686	LEAVE;
		1687	PUTBACK;
		1688	}
		1689
		1690	if (!(coro->flags & CF_RUNNING))
		1691	{
		1692	save_perl (aTHX_ coro);
		1693	load_perl (aTHX_ &temp);
		1694	}
		1695	}
		1696	}
		1697
		1698	SV *
		1699	is_ready (Coro::State coro)
		1700	PROTOTYPE: $
		1701	ALIAS:
		1702	is_ready = CF_READY
		1703	is_running = CF_RUNNING
		1704	is_new = CF_NEW
		1705	is_destroyed = CF_DESTROYED
		1706	CODE:
		1707	RETVAL = boolSV (coro->flags & ix);
		1708	OUTPUT:
		1709	RETVAL
		1710
		1711	void
		1712	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1713
		1714	SV *
		1715	has_stack (Coro::State coro)
		1716	PROTOTYPE: $
		1717	CODE:
		1718	RETVAL = boolSV (!!coro->cctx);
		1719	OUTPUT:
		1720	RETVAL
		1721
		1722	int
		1723	is_traced (Coro::State coro)
		1724	PROTOTYPE: $
		1725	CODE:
		1726	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1727	OUTPUT:
		1728	RETVAL
		1729
		1730	IV
		1731	rss (Coro::State coro)
		1732	PROTOTYPE: $
		1733	ALIAS:
		1734	usecount = 1
1005	CODE:	1735	CODE:
1006	static SV *returnstk;	1736	switch (ix)
1007	SV *sv;	1737	{
1008	AV *defav = GvAV (PL_defgv);	1738	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1009	struct coro *prev, *next;	1739	case 1: RETVAL = coro->usecount; break;
		1740	}
		1741	OUTPUT:
		1742	RETVAL
1010		1743
1011	if (!returnstk)
1012	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014	/* set up @_ -- ugly */
1015	av_clear (defav);
1016	av_fill (defav, items - 1);
1017	while (items--)
1018	av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021	sv = av_pop ((AV *)SvRV (returnstk));
1022	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024	SvREFCNT_dec (sv);
1025
1026	transfer(aTHX_ prev, next, 0);
1027		1744
1028	MODULE = Coro::State PACKAGE = Coro	1745	MODULE = Coro::State PACKAGE = Coro
1029		1746
1030	# this is slightly dirty (should expose a c-level api)
1031
1032	BOOT:	1747	BOOT:
1033	{	1748	{
1034	int i;	1749	int i;
		1750
		1751	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1752	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1753	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1754
		1755	coro_current = coro_get_sv ("Coro::current", FALSE);
		1756	SvREADONLY_on (coro_current);
		1757
1035	HV *stash = gv_stashpv ("Coro", TRUE);	1758	coro_stash = gv_stashpv ("Coro", TRUE);
1036		1759
1037	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1760	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1761	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1762	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1763	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1764	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1765	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043
1044	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046		1766
1047	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1767	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048	coro_ready[i] = newAV ();	1768	coro_ready[i] = newAV ();
1049		1769
1050	{	1770	{
1051	SV *sv = perl_get_sv("Coro::API", 1);	1771	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1772	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1052		1773
1053	coroapi.schedule = api_schedule;	1774	coroapi.schedule = api_schedule;
1054	coroapi.cede = api_cede;	1775	coroapi.cede = api_cede;
		1776	coroapi.cede_notself = api_cede_notself;
1055	coroapi.ready = api_ready;	1777	coroapi.ready = api_ready;
		1778	coroapi.is_ready = api_is_ready;
1056	coroapi.nready = &coro_nready;	1779	coroapi.nready = &coro_nready;
1057	coroapi.current = coro_current;	1780	coroapi.current = coro_current;
1058		1781
1059	GCoroAPI = &coroapi;	1782	GCoroAPI = &coroapi;
1060	sv_setiv(sv, (IV)&coroapi);	1783	sv_setiv (sv, (IV)&coroapi);
1061	SvREADONLY_on(sv);	1784	SvREADONLY_on (sv);
1062	}	1785	}
1063	}	1786	}
1064		1787
1065	void	1788	void
1066	ready(self)	1789	_set_current (SV *current)
1067	SV * self
1068	PROTOTYPE: $	1790	PROTOTYPE: $
1069	CODE:	1791	CODE:
1070	api_ready (self);	1792	SvREFCNT_dec (SvRV (coro_current));
		1793	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1071		1794
1072	int	1795	int
		1796	prio (Coro::State coro, int newprio = 0)
		1797	ALIAS:
		1798	nice = 1
		1799	CODE:
		1800	{
		1801	RETVAL = coro->prio;
		1802
		1803	if (items > 1)
		1804	{
		1805	if (ix)
		1806	newprio = coro->prio - newprio;
		1807
		1808	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1809	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1810
		1811	coro->prio = newprio;
		1812	}
		1813	}
		1814	OUTPUT:
		1815	RETVAL
		1816
		1817	SV *
		1818	ready (SV *self)
		1819	PROTOTYPE: $
		1820	CODE:
		1821	RETVAL = boolSV (api_ready (self));
		1822	OUTPUT:
		1823	RETVAL
		1824
		1825	int
1073	nready(...)	1826	nready (...)
1074	PROTOTYPE:	1827	PROTOTYPE:
1075	CODE:	1828	CODE:
1076	RETVAL = coro_nready;	1829	RETVAL = coro_nready;
1077	OUTPUT:	1830	OUTPUT:
1078	RETVAL	1831	RETVAL
1079		1832
1080	void	1833	void
1081	schedule(...)	1834	throw (Coro::State self, SV *throw = &PL_sv_undef)
1082	PROTOTYPE:	1835	PROTOTYPE: $;$
		1836	CODE:
		1837	SvREFCNT_dec (self->throw);
		1838	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1839
		1840	# for async_pool speedup
		1841	void
		1842	_pool_1 (SV *cb)
1083	CODE:	1843	CODE:
1084	api_schedule ();	1844	{
		1845	struct coro *coro = SvSTATE (coro_current);
		1846	HV *hv = (HV *)SvRV (coro_current);
		1847	AV *defav = GvAV (PL_defgv);
		1848	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1849	AV *invoke_av;
		1850	int i, len;
		1851
		1852	if (!invoke)
		1853	croak ("\3async_pool terminate\2\n");
		1854
		1855	SvREFCNT_dec (coro->saved_deffh);
		1856	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1857
		1858	hv_store (hv, "desc", sizeof ("desc") - 1,
		1859	newSVpvn (strpair ("[async_pool]")), 0);
		1860
		1861	invoke_av = (AV *)SvRV (invoke);
		1862	len = av_len (invoke_av);
		1863
		1864	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1865
		1866	if (len > 0)
		1867	{
		1868	av_fill (defav, len - 1);
		1869	for (i = 0; i < len; ++i)
		1870	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1871	}
		1872
		1873	SvREFCNT_dec (invoke);
		1874	}
1085		1875
1086	void	1876	void
1087	cede(...)	1877	_pool_2 (SV *cb)
1088	PROTOTYPE:
1089	CODE:	1878	CODE:
1090	api_cede ();	1879	{
		1880	struct coro *coro = SvSTATE (coro_current);
1091		1881
		1882	sv_setsv (cb, &PL_sv_undef);
		1883
		1884	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1885	coro->saved_deffh = 0;
		1886
		1887	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1888	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1889	croak ("\3async_pool terminate\2\n");
		1890
		1891	av_clear (GvAV (PL_defgv));
		1892	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1893	newSVpvn (strpair ("[async_pool idle]")), 0);
		1894
		1895	coro->prio = 0;
		1896
		1897	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1898	api_trace (coro_current, 0);
		1899
		1900	av_push (av_async_pool, newSVsv (coro_current));
		1901	}
		1902
		1903
		1904	MODULE = Coro::State PACKAGE = Coro::AIO
		1905
		1906	SV *
		1907	_get_state ()
		1908	CODE:
		1909	{
		1910	struct io_state *data;
		1911
		1912	RETVAL = newSV (sizeof (struct io_state));
		1913	data = (struct io_state *)SvPVX (RETVAL);
		1914	SvCUR_set (RETVAL, sizeof (struct io_state));
		1915	SvPOK_only (RETVAL);
		1916
		1917	data->errorno = errno;
		1918	data->laststype = PL_laststype;
		1919	data->laststatval = PL_laststatval;
		1920	data->statcache = PL_statcache;
		1921	}
		1922	OUTPUT:
		1923	RETVAL
		1924
		1925	void
		1926	_set_state (char *data_)
		1927	PROTOTYPE: $
		1928	CODE:
		1929	{
		1930	struct io_state *data = (void *)data_;
		1931
		1932	errno = data->errorno;
		1933	PL_laststype = data->laststype;
		1934	PL_laststatval = data->laststatval;
		1935	PL_statcache = data->statcache;
		1936	}
		1937

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