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Comparing Coro/Coro/State.xs (file contents):
Revision 1.45 by root, Tue May 27 01:15:31 2003 UTC vs.
Revision 1.202 by root, Mon Oct 8 02:50:23 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 top-level JMPENV for each coroutine, needed to catch dies. */	219	/* the c coroutine allocated to this perl coroutine, if any */
53	JMPENV start_env;	220	coro_cctx *cctx;
54		221
55	/* the optional C context */	222	/* process data */
56	coro_stack *stack;
57	void *cursp;
58	int gencnt;
59
60	/* optionally saved, might be zero */
61	AV *defav;
62	SV *defsv;
63	SV *errsv;
64
65	/* saved global state not related to stacks */
66	U8 dowarn;
67	I32 in_eval;
68
69	/* the stacks and related info (callchain etc..) */
70	PERL_SI *curstackinfo;
71	AV *curstack;
72	AV *mainstack;	223	AV *mainstack;
73	SV **stack_sp;	224	perl_slots *slot; /* basically the saved sp */
74	OP *op;
75	SV **curpad;
76	AV *comppad;
77	SV **stack_base;
78	SV **stack_max;
79	SV **tmps_stack;
80	I32 tmps_floor;
81	I32 tmps_ix;
82	I32 tmps_max;
83	I32 *markstack;
84	I32 *markstack_ptr;
85	I32 *markstack_max;
86	I32 *scopestack;
87	I32 scopestack_ix;
88	I32 scopestack_max;
89	ANY *savestack;
90	I32 savestack_ix;
91	I32 savestack_max;
92	OP **retstack;
93	I32 retstack_ix;
94	I32 retstack_max;
95	COP *curcop;
96	JMPENV *top_env;
97		225
98	/* data associated with this coroutine (initial args) */	226	/* data associated with this coroutine (initial args) */
99	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 */
100	};	244	};
101		245
102	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
103	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
104
105	static AV *main_mainstack; /* used to differentiate between $main and others */
106	static HV *coro_state_stash;
107	static SV *ucoro_state_sv;
108	static U32 ucoro_state_hash;
109	static HV *padlist_cache;
110	static SV *coro_mortal; /* will be freed after next transfer */
111
112	/* mostly copied from op.c:cv_clone2 */
113	STATIC AV *
114	clone_padlist (AV *protopadlist)
115	{
116	AV *av;
117	I32 ix;
118	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
119	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
120	SV **pname = AvARRAY (protopad_name);
121	SV **ppad = AvARRAY (protopad);
122	I32 fname = AvFILLp (protopad_name);
123	I32 fpad = AvFILLp (protopad);
124	AV *newpadlist, *newpad_name, *newpad;
125	SV **npad;
126
127	newpad_name = newAV ();
128	for (ix = fname; ix >= 0; ix--)
129	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
130
131	newpad = newAV ();
132	av_fill (newpad, AvFILLp (protopad));
133	npad = AvARRAY (newpad);
134
135	newpadlist = newAV ();
136	AvREAL_off (newpadlist);
137	av_store (newpadlist, 0, (SV *) newpad_name);
138	av_store (newpadlist, 1, (SV *) newpad);
139
140	av = newAV (); /* will be @_ */
141	av_extend (av, 0);
142	av_store (newpad, 0, (SV *) av);
143	AvFLAGS (av) = AVf_REIFY;
144
145	for (ix = fpad; ix > 0; ix--)
146	{
147	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
148	if (namesv && namesv != &PL_sv_undef)
149	{
150	char *name = SvPVX (namesv); /* XXX */
151	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
152	{ /* lexical from outside? */
153	npad[ix] = SvREFCNT_inc (ppad[ix]);
154	}
155	else
156	{ /* our own lexical */
157	SV *sv;
158	if (*name == '&')
159	sv = SvREFCNT_inc (ppad[ix]);
160	else if (*name == '@')
161	sv = (SV *) newAV ();
162	else if (*name == '%')
163	sv = (SV *) newHV ();
164	else
165	sv = NEWSV (0, 0);
166	if (!SvPADBUSY (sv))
167	SvPADMY_on (sv);
168	npad[ix] = sv;
169	}
170	}
171	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
172	{
173	npad[ix] = SvREFCNT_inc (ppad[ix]);
174	}
175	else
176	{
177	SV *sv = NEWSV (0, 0);
178	SvPADTMP_on (sv);
179	npad[ix] = sv;
180	}
181	}
182
183	#if 0 /* return -ENOTUNDERSTOOD */
184	/* Now that vars are all in place, clone nested closures. */
185
186	for (ix = fpad; ix > 0; ix--) {
187	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
188	if (namesv
189	&& namesv != &PL_sv_undef
190	&& !(SvFLAGS(namesv) & SVf_FAKE)
191	&& *SvPVX(namesv) == '&'
192	&& CvCLONE(ppad[ix]))
193	{
194	CV *kid = cv_clone((CV*)ppad[ix]);
195	SvREFCNT_dec(ppad[ix]);
196	CvCLONE_on(kid);
197	SvPADMY_on(kid);
198	npad[ix] = (SV*)kid;
199	}
200	}
201	#endif
202
203	return newpadlist;
204	}
205
206	#ifdef MAY_FLUSH
207	STATIC void
208	free_padlist (AV *padlist)
209	{
210	/* may be during global destruction */
211	if (SvREFCNT(padlist))
212	{
213	I32 i = AvFILLp(padlist);
214	while (i >= 0)
215	{
216	SV **svp = av_fetch(padlist, i--, FALSE);
217	SV *sv = svp ? *svp : Nullsv;
218	if (sv)
219	SvREFCNT_dec(sv);
220	}
221
222	SvREFCNT_dec((SV*)padlist);
223	}
224	}
225	#endif
226
227	/* the next two functions merely cache the padlists */
228	STATIC void
229	get_padlist (CV *cv)
230	{
231	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
232
233	if (he && AvFILLp ((AV *)*he) >= 0)
234	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
235	else
236	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
237	}
238
239	STATIC void
240	put_padlist (CV *cv)
241	{
242	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
243
244	if (SvTYPE (*he) != SVt_PVAV)
245	{
246	SvREFCNT_dec (*he);
247	*he = (SV *)newAV ();
248	}
249
250	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
251	}
252
253	#ifdef MAY_FLUSH
254	STATIC void
255	flush_padlist_cache ()
256	{
257	HV *hv = padlist_cache;
258	padlist_cache = newHV ();
259
260	if (hv_iterinit (hv))
261	{
262	HE *he;
263	AV *padlist;
264
265	while (!!(he = hv_iternext (hv)))
266	{
267	AV *av = (AV *)HeVAL(he);
268
269	/* casting is fun. */
270	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
271	free_padlist (padlist);
272	}
273	}
274
275	SvREFCNT_dec (hv);
276	}
277	#endif
278
279	#define SB do {
280	#define SE } while (0)
281
282	#define LOAD(state) load_state(aTHX_ (state));
283	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
284
285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
286
287	static void
288	load_state(pTHX_ Coro__State c)
289	{
290	PL_dowarn = c->dowarn;
291	PL_in_eval = c->in_eval;
292
293	PL_curstackinfo = c->curstackinfo;
294	PL_curstack = c->curstack;
295	PL_mainstack = c->mainstack;
296	PL_stack_sp = c->stack_sp;
297	PL_op = c->op;
298	PL_curpad = c->curpad;
299	PL_comppad = c->comppad;
300	PL_stack_base = c->stack_base;
301	PL_stack_max = c->stack_max;
302	PL_tmps_stack = c->tmps_stack;
303	PL_tmps_floor = c->tmps_floor;
304	PL_tmps_ix = c->tmps_ix;
305	PL_tmps_max = c->tmps_max;
306	PL_markstack = c->markstack;
307	PL_markstack_ptr = c->markstack_ptr;
308	PL_markstack_max = c->markstack_max;
309	PL_scopestack = c->scopestack;
310	PL_scopestack_ix = c->scopestack_ix;
311	PL_scopestack_max = c->scopestack_max;
312	PL_savestack = c->savestack;
313	PL_savestack_ix = c->savestack_ix;
314	PL_savestack_max = c->savestack_max;
315	PL_retstack = c->retstack;
316	PL_retstack_ix = c->retstack_ix;
317	PL_retstack_max = c->retstack_max;
318	PL_curcop = c->curcop;
319	PL_top_env = c->top_env;
320
321	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
322	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
323	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
324
325	{
326	dSP;
327	CV *cv;
328
329	/* now do the ugly restore mess */
330	while ((cv = (CV *)POPs))
331	{
332	AV *padlist = (AV *)POPs;
333
334	if (padlist)
335	{
336	put_padlist (cv); /* mark this padlist as available */
337	CvPADLIST(cv) = padlist;
338	#ifdef USE_THREADS
339	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
340	#endif
341	}
342
343	++CvDEPTH(cv);
344	}
345
346	PUTBACK;
347	}
348	}
349
350	static void
351	save_state(pTHX_ Coro__State c, int flags)
352	{
353	{
354	dSP;
355	I32 cxix = cxstack_ix;
356	PERL_CONTEXT *ccstk = cxstack;
357	PERL_SI *top_si = PL_curstackinfo;
358
359	/*
360	* the worst thing you can imagine happens first - we have to save
361	* (and reinitialize) all cv's in the whole callchain :(
362	*/
363
364	PUSHs (Nullsv);
365	/* this loop was inspired by pp_caller */
366	for (;;)
367	{
368	while (cxix >= 0)
369	{
370	PERL_CONTEXT *cx = &ccstk[cxix--];
371
372	if (CxTYPE(cx) == CXt_SUB)
373	{
374	CV *cv = cx->blk_sub.cv;
375	if (CvDEPTH(cv))
376	{
377	#ifdef USE_THREADS
378	/*XPUSHs ((SV *)CvOWNER(cv));*/
379	/*CvOWNER(cv) = 0;*/
380	/*error must unlock this cv etc.. etc...*/
381	#endif
382	EXTEND (SP, CvDEPTH(cv)*2);
383
384	while (--CvDEPTH(cv))
385	{
386	/* this tells the restore code to increment CvDEPTH */
387	PUSHs (Nullsv);
388	PUSHs ((SV *)cv);
389	}
390
391	PUSHs ((SV *)CvPADLIST(cv));
392	PUSHs ((SV *)cv);
393
394	get_padlist (cv); /* this is a monster */
395	}
396	}
397	else if (CxTYPE(cx) == CXt_FORMAT)
398	{
399	/* I never used formats, so how should I know how these are implemented? */
400	/* my bold guess is as a simple, plain sub... */
401	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
402	}
403	}
404
405	if (top_si->si_type == PERLSI_MAIN)
406	break;
407
408	top_si = top_si->si_prev;
409	ccstk = top_si->si_cxstack;
410	cxix = top_si->si_cxix;
411	}
412
413	PUTBACK;
414	}
415
416	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
417	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
418	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
419
420	c->dowarn = PL_dowarn;
421	c->in_eval = PL_in_eval;
422
423	c->curstackinfo = PL_curstackinfo;
424	c->curstack = PL_curstack;
425	c->mainstack = PL_mainstack;
426	c->stack_sp = PL_stack_sp;
427	c->op = PL_op;
428	c->curpad = PL_curpad;
429	c->comppad = PL_comppad;
430	c->stack_base = PL_stack_base;
431	c->stack_max = PL_stack_max;
432	c->tmps_stack = PL_tmps_stack;
433	c->tmps_floor = PL_tmps_floor;
434	c->tmps_ix = PL_tmps_ix;
435	c->tmps_max = PL_tmps_max;
436	c->markstack = PL_markstack;
437	c->markstack_ptr = PL_markstack_ptr;
438	c->markstack_max = PL_markstack_max;
439	c->scopestack = PL_scopestack;
440	c->scopestack_ix = PL_scopestack_ix;
441	c->scopestack_max = PL_scopestack_max;
442	c->savestack = PL_savestack;
443	c->savestack_ix = PL_savestack_ix;
444	c->savestack_max = PL_savestack_max;
445	c->retstack = PL_retstack;
446	c->retstack_ix = PL_retstack_ix;
447	c->retstack_max = PL_retstack_max;
448	c->curcop = PL_curcop;
449	c->top_env = PL_top_env;
450	}
451
452	/*
453	* allocate various perl stacks. This is an exact copy
454	* of perl.c:init_stacks, except that it uses less memory
455	* on the assumption that coroutines do not usually need
456	* a lot of stackspace.
457	*/
458	STATIC void
459	coro_init_stacks (pTHX)
460	{
461	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
462	PL_curstackinfo->si_type = PERLSI_MAIN;
463	PL_curstack = PL_curstackinfo->si_stack;
464	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
465
466	PL_stack_base = AvARRAY(PL_curstack);
467	PL_stack_sp = PL_stack_base;
468	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
469
470	New(50,PL_tmps_stack,96,SV*);
471	PL_tmps_floor = -1;
472	PL_tmps_ix = -1;
473	PL_tmps_max = 96;
474
475	New(54,PL_markstack,16,I32);
476	PL_markstack_ptr = PL_markstack;
477	PL_markstack_max = PL_markstack + 16;
478
479	SET_MARK_OFFSET;
480
481	New(54,PL_scopestack,16,I32);
482	PL_scopestack_ix = 0;
483	PL_scopestack_max = 16;
484
485	New(54,PL_savestack,96,ANY);
486	PL_savestack_ix = 0;
487	PL_savestack_max = 96;
488
489	New(54,PL_retstack,8,OP*);
490	PL_retstack_ix = 0;
491	PL_retstack_max = 8;
492	}
493
494	/*
495	* destroy the stacks, the callchain etc...
496	* still there is a memleak of 128 bytes...
497	*/
498	STATIC void
499	destroy_stacks(pTHX)
500	{
501	if (!IN_DESTRUCT)
502	{
503	/* is this ugly, I ask? */
504	while (PL_scopestack_ix)
505	LEAVE;
506
507	/* sure it is, but more important: is it correct?? :/ */
508	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
509	FREETMPS;
510	}
511
512	while (PL_curstackinfo->si_next)
513	PL_curstackinfo = PL_curstackinfo->si_next;
514
515	while (PL_curstackinfo)
516	{
517	PERL_SI *p = PL_curstackinfo->si_prev;
518
519	{
520	dSP;
521	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
522	PUTBACK; /* possibly superfluous */
523	}
524
525	if (!IN_DESTRUCT)
526	{
527	dounwind(-1);
528	SvREFCNT_dec(PL_curstackinfo->si_stack);
529	}
530
531	Safefree(PL_curstackinfo->si_cxstack);
532	Safefree(PL_curstackinfo);
533	PL_curstackinfo = p;
534	}
535
536	Safefree(PL_tmps_stack);
537	Safefree(PL_markstack);
538	Safefree(PL_scopestack);
539	Safefree(PL_savestack);
540	Safefree(PL_retstack);
541	}
542
543	static void
544	allocate_stack (Coro__State ctx, int alloc)
545	{
546	coro_stack *stack;
547
548	New (0, stack, 1, coro_stack);
549
550	stack->refcnt = 1;
551	stack->usecnt = 1;
552	stack->gencnt = ctx->gencnt = 0;
553	if (alloc)
554	{
555	#if HAVE_MMAP
556	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
558	if (stack->sptr == (void *)-1)
559	#endif
560	{
561	/*FIXME*//*D*//* reasonable stack size! */
562	stack->ssize = -4096 * sizeof (long);
563	New (0, stack->sptr, 4096, long);
564	}
565	}
566	else
567	stack->sptr = 0;
568
569	ctx->stack = stack;
570	}
571
572	static void
573	deallocate_stack (Coro__State ctx)
574	{
575	coro_stack *stack = ctx->stack;
576
577	ctx->stack = 0;
578
579	if (stack)
580	{
581	if (!--stack->refcnt)
582	{
583	#ifdef HAVE_MMAP
584	if (stack->ssize > 0 && stack->sptr)
585	munmap (stack->sptr, stack->ssize);
586	else
587	#else
588	Safefree (stack->sptr);
589	#endif
590	Safefree (stack);
591	}
592	else if (ctx->gencnt == stack->gencnt)
593	--stack->usecnt;
594	}
595	}
596
597	static void
598	setup_coro (void *arg)
599	{
600	/*
601	* emulate part of the perl startup here.
602	*/
603	dSP;
604	Coro__State ctx = (Coro__State)arg;
605	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606
607	coro_init_stacks (aTHX);
608	/*PL_curcop = 0;*/
609	/*PL_in_eval = PL_in_eval;*/ /* inherit */
610	SvREFCNT_dec (GvAV (PL_defgv));
611	GvAV (PL_defgv) = ctx->args;
612
613	SPAGAIN;
614
615	if (ctx->stack)
616	{
617	ctx->cursp = 0;
618
619	PUSHMARK(SP);
620	PUTBACK;
621	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623	if (SvTRUE (ERRSV))
624	croak (NULL);
625	else
626	croak ("FATAL: CCTXT coroutine returned!");
627	}
628	else
629	{
630	UNOP myop;
631
632	PL_op = (OP *)&myop;
633
634	Zero(&myop, 1, UNOP);
635	myop.op_next = Nullop;
636	myop.op_flags = OPf_WANT_VOID;
637
638	PUSHMARK(SP);
639	XPUSHs (sub_init);
640	/*
641	* the next line is slightly wrong, as PL_op->op_next
642	* is actually being executed so we skip the first op.
643	* that doesn't matter, though, since it is only
644	* pp_nextstate and we never return...
645	* ah yes, and I don't care anyways ;)
646	*/
647	PUTBACK;
648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;
650
651	ENTER; /* necessary e.g. for dounwind */
652	}
653	}
654
655	static void
656	continue_coro (void *arg)
657	{
658	/*
659	* this is a _very_ stripped down perl interpreter ;)
660	*/
661	Coro__State ctx = (Coro__State)arg;
662	JMPENV coro_start_env;
663
664	PL_top_env = &ctx->start_env;
665
666	ctx->cursp = 0;
667	PL_op = PL_op->op_next;
668	CALLRUNOPS(aTHX);
669
670	abort ();
671	}
672
673	STATIC void
674	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
675	{
676	dSTACKLEVEL;
677	static struct coro *xnext;
678
679	if (prev != next)
680	{
681	xnext = next;
682
683	if (next->mainstack)
684	{
685	SAVE (prev, flags);
686	LOAD (next);
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	/* don't add any code here */
716	}
717
718	}
719	else if (next->tmps_ix == -2)
720	croak ("tried to transfer to running coroutine");
721	else
722	{
723	SAVE (prev, -1); /* first get rid of the old state */
724
725	if (flags & TRANSFER_SAVE_CCTXT)
726	{
727	if (!prev->stack)
728	allocate_stack (prev, 0);
729
730	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731	{
732	PL_top_env = &next->start_env;
733
734	setup_coro (next);
735
736	prev->stack->refcnt++;
737	prev->stack->usecnt++;
738	next->stack = prev->stack;
739	next->gencnt = prev->gencnt;
740	}
741	else
742	{
743	allocate_stack (next, 1);
744	coro_create (&(next->stack->cctx),
745	setup_coro, (void *)next,
746	next->stack->sptr, labs (next->stack->ssize));
747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748	/* don't add any code here */
749	}
750	}
751	else
752	setup_coro (next);
753	}
754
755	/*
756	* xnext is now either prev or next, depending on wether
757	* we switched the c stack or not. that's why I use a global
758	* variable, that should become thread-specific at one point.
759	*/
760	xnext->cursp = stacklevel;
761	}
762
763	if (coro_mortal)
764	{
765	SvREFCNT_dec (coro_mortal);
766	coro_mortal = 0;
767	}
768	}
769
770	#define SV_CORO(sv,func) \
771	do { \
772	if (SvROK (sv)) \
773	sv = SvRV (sv); \
774	\
775	if (SvTYPE(sv) == SVt_PVHV) \
776	{ \
777	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
778	\
779	if (!he) \
780	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
781	\
782	(sv) = SvRV (HeVAL(he)); \
783	} \
784	\
785	/* must also be changed inside Coro::Cont::yield */ \
786	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
787	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
788	\
789	} while(0)
790
791	#define SvSTATE(sv) (struct coro *)SvIV (sv)
792
793	static void
794	api_transfer(pTHX_ SV *prev, SV *next, int flags)
795	{
796	SV_CORO (prev, "Coro::transfer");
797	SV_CORO (next, "Coro::transfer");
798
799	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
800	}
801		248
802	/** Coro ********************************************************************/	249	/** Coro ********************************************************************/
803		250
804	#define PRIO_MAX 3	251	#define PRIO_MAX 3
805	#define PRIO_HIGH 1	252	#define PRIO_HIGH 1
…		…
807	#define PRIO_LOW -1	254	#define PRIO_LOW -1
808	#define PRIO_IDLE -3	255	#define PRIO_IDLE -3
809	#define PRIO_MIN -4	256	#define PRIO_MIN -4
810		257
811	/* for Coro.pm */	258	/* for Coro.pm */
812	static GV *coro_current, *coro_idle;	259	static SV *coro_current;
813	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
814	static int coro_nready;	261	static int coro_nready;
		262	static struct coro *coro_first;
815		263
816	static void	264	/** lowlevel stuff **********************************************************/
817	coro_enq (SV *sv)
818	{
819	if (SvTYPE (sv) == SVt_PVHV)
820	{
821	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
822	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
823
824	prio = prio > PRIO_MAX ? PRIO_MAX
825	: prio < PRIO_MIN ? PRIO_MIN
826	: prio;
827
828	av_push (coro_ready [prio - PRIO_MIN], sv);
829	coro_nready++;
830
831	return;
832	}
833
834	croak ("Coro::ready tried to enqueue something that is not a coroutine");
835	}
836		265
837	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	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
		459	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
		460
		461	{
		462	dSP;
		463
		464	CV *cv;
		465
		466	/* now do the ugly restore mess */
		467	while (expect_true (cv = (CV *)POPs))
		468	{
		469	put_padlist (aTHX_ cv); /* mark this padlist as available */
		470	CvDEPTH (cv) = PTR2IV (POPs);
		471	CvPADLIST (cv) = (AV *)POPs;
		472	}
		473
		474	PUTBACK;
		475	}
		476	}
		477
		478	static void
		479	save_perl (pTHX_ Coro__State c)
		480	{
		481	{
		482	dSP;
		483	I32 cxix = cxstack_ix;
		484	PERL_CONTEXT *ccstk = cxstack;
		485	PERL_SI *top_si = PL_curstackinfo;
		486
		487	/*
		488	* the worst thing you can imagine happens first - we have to save
		489	* (and reinitialize) all cv's in the whole callchain :(
		490	*/
		491
		492	XPUSHs (Nullsv);
		493	/* this loop was inspired by pp_caller */
		494	for (;;)
		495	{
		496	while (expect_true (cxix >= 0))
		497	{
		498	PERL_CONTEXT *cx = &ccstk[cxix--];
		499
		500	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
		501	{
		502	CV *cv = cx->blk_sub.cv;
		503
		504	if (expect_true (CvDEPTH (cv)))
		505	{
		506	EXTEND (SP, 3);
		507	PUSHs ((SV *)CvPADLIST (cv));
		508	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
		509	PUSHs ((SV *)cv);
		510
		511	CvDEPTH (cv) = 0;
		512	get_padlist (aTHX_ cv);
		513	}
		514	}
		515	}
		516
		517	if (expect_true (top_si->si_type == PERLSI_MAIN))
		518	break;
		519
		520	top_si = top_si->si_prev;
		521	ccstk = top_si->si_cxstack;
		522	cxix = top_si->si_cxix;
		523	}
		524
		525	PUTBACK;
		526	}
		527
		528	/* allocate some space on the context stack for our purposes */
		529	/* we manually unroll here, as usually 2 slots is enough */
		530	if (SLOT_COUNT >= 1) CXINC;
		531	if (SLOT_COUNT >= 2) CXINC;
		532	if (SLOT_COUNT >= 3) CXINC;
		533	{
		534	int i;
		535	for (i = 3; i < SLOT_COUNT; ++i)
		536	CXINC;
		537	}
		538	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		539
		540	c->mainstack = PL_mainstack;
		541
		542	{
		543	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		544
		545	slot->defav = GvAV (PL_defgv);
		546	slot->defsv = DEFSV;
		547	slot->errsv = ERRSV;
		548	slot->irsgv = GvSV (irsgv);
		549
		550	#define VAR(name,type) slot->name = PL_ ## name;
		551	# include "state.h"
		552	#undef VAR
		553	}
		554	}
		555
		556	/*
		557	* allocate various perl stacks. This is an exact copy
		558	* of perl.c:init_stacks, except that it uses less memory
		559	* on the (sometimes correct) assumption that coroutines do
		560	* not usually need a lot of stackspace.
		561	*/
		562	#if 1
		563	# define coro_init_stacks init_stacks
		564	#else
		565	static void
		566	coro_init_stacks (pTHX)
		567	{
		568	PL_curstackinfo = new_stackinfo(32, 8);
		569	PL_curstackinfo->si_type = PERLSI_MAIN;
		570	PL_curstack = PL_curstackinfo->si_stack;
		571	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		572
		573	PL_stack_base = AvARRAY(PL_curstack);
		574	PL_stack_sp = PL_stack_base;
		575	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		576
		577	New(50,PL_tmps_stack,32,SV*);
		578	PL_tmps_floor = -1;
		579	PL_tmps_ix = -1;
		580	PL_tmps_max = 32;
		581
		582	New(54,PL_markstack,16,I32);
		583	PL_markstack_ptr = PL_markstack;
		584	PL_markstack_max = PL_markstack + 16;
		585
		586	#ifdef SET_MARK_OFFSET
		587	SET_MARK_OFFSET;
		588	#endif
		589
		590	New(54,PL_scopestack,8,I32);
		591	PL_scopestack_ix = 0;
		592	PL_scopestack_max = 8;
		593
		594	New(54,PL_savestack,24,ANY);
		595	PL_savestack_ix = 0;
		596	PL_savestack_max = 24;
		597
		598	#if !PERL_VERSION_ATLEAST (5,9,0)
		599	New(54,PL_retstack,4,OP*);
		600	PL_retstack_ix = 0;
		601	PL_retstack_max = 4;
		602	#endif
		603	}
		604	#endif
		605
		606	/*
		607	* destroy the stacks, the callchain etc...
		608	*/
		609	static void
		610	coro_destroy_stacks (pTHX)
		611	{
		612	while (PL_curstackinfo->si_next)
		613	PL_curstackinfo = PL_curstackinfo->si_next;
		614
		615	while (PL_curstackinfo)
		616	{
		617	PERL_SI *p = PL_curstackinfo->si_prev;
		618
		619	if (!IN_DESTRUCT)
		620	SvREFCNT_dec (PL_curstackinfo->si_stack);
		621
		622	Safefree (PL_curstackinfo->si_cxstack);
		623	Safefree (PL_curstackinfo);
		624	PL_curstackinfo = p;
		625	}
		626
		627	Safefree (PL_tmps_stack);
		628	Safefree (PL_markstack);
		629	Safefree (PL_scopestack);
		630	Safefree (PL_savestack);
		631	#if !PERL_VERSION_ATLEAST (5,9,0)
		632	Safefree (PL_retstack);
		633	#endif
		634	}
		635
		636	static size_t
		637	coro_rss (pTHX_ struct coro *coro)
		638	{
		639	size_t rss = sizeof (*coro);
		640
		641	if (coro->mainstack)
		642	{
		643	perl_slots tmp_slot;
		644	perl_slots *slot;
		645
		646	if (coro->flags & CF_RUNNING)
		647	{
		648	slot = &tmp_slot;
		649
		650	#define VAR(name,type) slot->name = PL_ ## name;
		651	# include "state.h"
		652	#undef VAR
		653	}
		654	else
		655	slot = coro->slot;
		656
		657	rss += sizeof (slot->curstackinfo);
		658	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		659	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		660	rss += slot->tmps_max * sizeof (SV *);
		661	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		662	rss += slot->scopestack_max * sizeof (I32);
		663	rss += slot->savestack_max * sizeof (ANY);
		664
		665	#if !PERL_VERSION_ATLEAST (5,9,0)
		666	rss += slot->retstack_max * sizeof (OP *);
		667	#endif
		668	}
		669
		670	return rss;
		671	}
		672
		673	/** coroutine stack handling ************************************************/
		674
		675	static void
		676	coro_setup (pTHX_ struct coro *coro)
		677	{
		678	/*
		679	* emulate part of the perl startup here.
		680	*/
		681	coro_init_stacks (aTHX);
		682
		683	PL_runops = RUNOPS_DEFAULT;
		684	PL_curcop = &PL_compiling;
		685	PL_in_eval = EVAL_NULL;
		686	PL_comppad = 0;
		687	PL_curpm = 0;
		688	PL_curpad = 0;
		689	PL_localizing = 0;
		690	PL_dirty = 0;
		691	PL_restartop = 0;
		692	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		693	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		694
		695	GvSV (PL_defgv) = newSV (0);
		696	GvAV (PL_defgv) = coro->args; coro->args = 0;
		697	GvSV (PL_errgv) = newSV (0);
		698	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		699	PL_rs = newSVsv (GvSV (irsgv));
		700	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		701
		702	{
		703	dSP;
		704	LOGOP myop;
		705
		706	Zero (&myop, 1, LOGOP);
		707	myop.op_next = Nullop;
		708	myop.op_flags = OPf_WANT_VOID;
		709
		710	PUSHMARK (SP);
		711	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		712	PUTBACK;
		713	PL_op = (OP *)&myop;
		714	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		715	SPAGAIN;
		716	}
		717
		718	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		719	}
		720
		721	static void
		722	coro_destroy (pTHX_ struct coro *coro)
		723	{
		724	if (!IN_DESTRUCT)
		725	{
		726	/* restore all saved variables and stuff */
		727	LEAVE_SCOPE (0);
		728	assert (PL_tmps_floor == -1);
		729
		730	/* free all temporaries */
		731	FREETMPS;
		732	assert (PL_tmps_ix == -1);
		733
		734	/* unwind all extra stacks */
		735	POPSTACK_TO (PL_mainstack);
		736
		737	/* unwind main stack */
		738	dounwind (-1);
		739	}
		740
		741	SvREFCNT_dec (GvSV (PL_defgv));
		742	SvREFCNT_dec (GvAV (PL_defgv));
		743	SvREFCNT_dec (GvSV (PL_errgv));
		744	SvREFCNT_dec (PL_defoutgv);
		745	SvREFCNT_dec (PL_rs);
		746	SvREFCNT_dec (GvSV (irsgv));
		747
		748	SvREFCNT_dec (PL_diehook);
		749	SvREFCNT_dec (PL_warnhook);
		750
		751	SvREFCNT_dec (coro->saved_deffh);
		752	SvREFCNT_dec (coro->throw);
		753
		754	coro_destroy_stacks (aTHX);
		755	}
		756
		757	static void
		758	free_coro_mortal (pTHX)
		759	{
		760	if (expect_true (coro_mortal))
		761	{
		762	SvREFCNT_dec (coro_mortal);
		763	coro_mortal = 0;
		764	}
		765	}
		766
		767	static int
		768	runops_trace (pTHX)
		769	{
		770	COP *oldcop = 0;
		771	int oldcxix = -2;
		772	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		773	coro_cctx *cctx = coro->cctx;
		774
		775	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		776	{
		777	PERL_ASYNC_CHECK ();
		778
		779	if (cctx->flags & CC_TRACE_ALL)
		780	{
		781	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		782	{
		783	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		784	SV **bot, **top;
		785	AV *av = newAV (); /* return values */
		786	SV **cb;
		787	dSP;
		788
		789	GV *gv = CvGV (cx->blk_sub.cv);
		790	SV *fullname = sv_2mortal (newSV (0));
		791	if (isGV (gv))
		792	gv_efullname3 (fullname, gv, 0);
		793
		794	bot = PL_stack_base + cx->blk_oldsp + 1;
		795	top = cx->blk_gimme == G_ARRAY ? SP + 1
		796	: cx->blk_gimme == G_SCALAR ? bot + 1
		797	: bot;
		798
		799	av_extend (av, top - bot);
		800	while (bot < top)
		801	av_push (av, SvREFCNT_inc (*bot++));
		802
		803	PL_runops = RUNOPS_DEFAULT;
		804	ENTER;
		805	SAVETMPS;
		806	EXTEND (SP, 3);
		807	PUSHMARK (SP);
		808	PUSHs (&PL_sv_no);
		809	PUSHs (fullname);
		810	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		811	PUTBACK;
		812	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		813	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		814	SPAGAIN;
		815	FREETMPS;
		816	LEAVE;
		817	PL_runops = runops_trace;
		818	}
		819
		820	if (oldcop != PL_curcop)
		821	{
		822	oldcop = PL_curcop;
		823
		824	if (PL_curcop != &PL_compiling)
		825	{
		826	SV **cb;
		827
		828	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		829	{
		830	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		831
		832	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		833	{
		834	runops_proc_t old_runops = PL_runops;
		835	dSP;
		836	GV *gv = CvGV (cx->blk_sub.cv);
		837	SV *fullname = sv_2mortal (newSV (0));
		838
		839	if (isGV (gv))
		840	gv_efullname3 (fullname, gv, 0);
		841
		842	PL_runops = RUNOPS_DEFAULT;
		843	ENTER;
		844	SAVETMPS;
		845	EXTEND (SP, 3);
		846	PUSHMARK (SP);
		847	PUSHs (&PL_sv_yes);
		848	PUSHs (fullname);
		849	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		850	PUTBACK;
		851	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		852	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		853	SPAGAIN;
		854	FREETMPS;
		855	LEAVE;
		856	PL_runops = runops_trace;
		857	}
		858
		859	oldcxix = cxstack_ix;
		860	}
		861
		862	if (cctx->flags & CC_TRACE_LINE)
		863	{
		864	dSP;
		865
		866	PL_runops = RUNOPS_DEFAULT;
		867	ENTER;
		868	SAVETMPS;
		869	EXTEND (SP, 3);
		870	PL_runops = RUNOPS_DEFAULT;
		871	PUSHMARK (SP);
		872	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		873	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		874	PUTBACK;
		875	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		876	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		877	SPAGAIN;
		878	FREETMPS;
		879	LEAVE;
		880	PL_runops = runops_trace;
		881	}
		882	}
		883	}
		884	}
		885	}
		886
		887	TAINT_NOT;
		888	return 0;
		889	}
		890
		891	/* inject a fake call to Coro::State::_cctx_init into the execution */
		892	/* _cctx_init should be careful, as it could be called at almost any time */
		893	/* during execution of a perl program */
		894	static void NOINLINE
		895	cctx_prepare (pTHX_ coro_cctx *cctx)
		896	{
		897	dSP;
		898	LOGOP myop;
		899
		900	PL_top_env = &PL_start_env;
		901
		902	if (cctx->flags & CC_TRACE)
		903	PL_runops = runops_trace;
		904
		905	Zero (&myop, 1, LOGOP);
		906	myop.op_next = PL_op;
		907	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		908
		909	PUSHMARK (SP);
		910	EXTEND (SP, 2);
		911	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		912	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		913	PUTBACK;
		914	PL_op = (OP *)&myop;
		915	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		916	SPAGAIN;
		917	}
		918
		919	/*
		920	* this is a _very_ stripped down perl interpreter ;)
		921	*/
		922	static void
		923	cctx_run (void *arg)
		924	{
		925	dTHX;
		926
		927	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		928	UNLOCK;
		929
		930	/* we now skip the entersub that lead to transfer() */
		931	PL_op = PL_op->op_next;
		932
		933	/* inject a fake subroutine call to cctx_init */
		934	cctx_prepare (aTHX_ (coro_cctx *)arg);
		935
		936	/* somebody or something will hit me for both perl_run and PL_restartop */
		937	PL_restartop = PL_op;
		938	perl_run (PL_curinterp);
		939
		940	/*
		941	* If perl-run returns we assume exit() was being called or the coro
		942	* fell off the end, which seems to be the only valid (non-bug)
		943	* reason for perl_run to return. We try to exit by jumping to the
		944	* bootstrap-time "top" top_env, as we cannot restore the "main"
		945	* coroutine as Coro has no such concept
		946	*/
		947	PL_top_env = main_top_env;
		948	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		949	}
		950
		951	static coro_cctx *
		952	cctx_new ()
		953	{
		954	coro_cctx *cctx;
		955	void *stack_start;
		956	size_t stack_size;
		957
		958	++cctx_count;
		959
		960	Newz (0, cctx, 1, coro_cctx);
		961
		962	#if HAVE_MMAP
		963	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		964	/* mmap supposedly does allocate-on-write for us */
		965	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		966
		967	if (cctx->sptr != (void *)-1)
		968	{
		969	# if CORO_STACKGUARD
		970	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		971	# endif
		972	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		973	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		974	cctx->flags |= CC_MAPPED;
		975	}
		976	else
		977	#endif
		978	{
		979	cctx->ssize = coro_stacksize * (long)sizeof (long);
		980	New (0, cctx->sptr, coro_stacksize, long);
		981
		982	if (!cctx->sptr)
		983	{
		984	perror ("FATAL: unable to allocate stack for coroutine");
		985	_exit (EXIT_FAILURE);
		986	}
		987
		988	stack_start = cctx->sptr;
		989	stack_size = cctx->ssize;
		990	}
		991
		992	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		993	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		994
		995	return cctx;
		996	}
		997
		998	static void
		999	cctx_destroy (coro_cctx *cctx)
		1000	{
		1001	if (!cctx)
		1002	return;
		1003
		1004	--cctx_count;
		1005
		1006	#if CORO_USE_VALGRIND
		1007	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1008	#endif
		1009
		1010	#if HAVE_MMAP
		1011	if (cctx->flags & CC_MAPPED)
		1012	munmap (cctx->sptr, cctx->ssize);
		1013	else
		1014	#endif
		1015	Safefree (cctx->sptr);
		1016
		1017	Safefree (cctx);
		1018	}
		1019
		1020	/* wether this cctx should be destructed */
		1021	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1022
		1023	static coro_cctx *
		1024	cctx_get (pTHX)
		1025	{
		1026	while (expect_true (cctx_first))
		1027	{
		1028	coro_cctx *cctx = cctx_first;
		1029	cctx_first = cctx->next;
		1030	--cctx_idle;
		1031
		1032	if (expect_true (!CCTX_EXPIRED (cctx)))
		1033	return cctx;
		1034
		1035	cctx_destroy (cctx);
		1036	}
		1037
		1038	return cctx_new ();
		1039	}
		1040
		1041	static void
		1042	cctx_put (coro_cctx *cctx)
		1043	{
		1044	/* free another cctx if overlimit */
		1045	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1046	{
		1047	coro_cctx *first = cctx_first;
		1048	cctx_first = first->next;
		1049	--cctx_idle;
		1050
		1051	cctx_destroy (first);
		1052	}
		1053
		1054	++cctx_idle;
		1055	cctx->next = cctx_first;
		1056	cctx_first = cctx;
		1057	}
		1058
		1059	/** coroutine switching *****************************************************/
		1060
		1061	static void
		1062	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1063	{
		1064	if (expect_true (prev != next))
		1065	{
		1066	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1067	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1068
		1069	if (expect_false (next->flags & CF_RUNNING))
		1070	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1071
		1072	if (expect_false (next->flags & CF_DESTROYED))
		1073	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1074
		1075	if (
		1076	#if PERL_VERSION_ATLEAST (5,9,0)
		1077	expect_false (PL_parser)
		1078	#else
		1079	expect_false (PL_lex_state != LEX_NOTPARSING)
		1080	#endif
		1081	)
		1082	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1083	}
		1084	}
		1085
		1086	/* always use the TRANSFER macro */
		1087	static void NOINLINE
		1088	transfer (pTHX_ struct coro *prev, struct coro *next)
		1089	{
		1090	dSTACKLEVEL;
		1091
		1092	/* sometimes transfer is only called to set idle_sp */
		1093	if (expect_false (!next))
		1094	{
		1095	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1096	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1097	}
		1098	else if (expect_true (prev != next))
		1099	{
		1100	coro_cctx *prev__cctx;
		1101
		1102	if (expect_false (prev->flags & CF_NEW))
		1103	{
		1104	/* create a new empty context */
		1105	Newz (0, prev->cctx, 1, coro_cctx);
		1106	prev->flags &= ~CF_NEW;
		1107	prev->flags |= CF_RUNNING;
		1108	}
		1109
		1110	prev->flags &= ~CF_RUNNING;
		1111	next->flags |= CF_RUNNING;
		1112
		1113	LOCK;
		1114
		1115	if (expect_false (next->flags & CF_NEW))
		1116	{
		1117	/* need to start coroutine */
		1118	next->flags &= ~CF_NEW;
		1119	/* first get rid of the old state */
		1120	save_perl (aTHX_ prev);
		1121	/* setup coroutine call */
		1122	coro_setup (aTHX_ next);
		1123	}
		1124	else
		1125	{
		1126	/* coroutine already started */
		1127	save_perl (aTHX_ prev);
		1128	load_perl (aTHX_ next);
		1129	}
		1130
		1131	prev__cctx = prev->cctx;
		1132
		1133	/* possibly "free" the cctx */
		1134	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1135	{
		1136	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1137	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1138
		1139	prev->cctx = 0;
		1140
		1141	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1142	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1143	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1144	if (!next->cctx)
		1145	next->cctx = cctx_get (aTHX);
		1146
		1147	cctx_put (prev__cctx);
		1148	}
		1149
		1150	++next->usecount;
		1151
		1152	if (expect_true (!next->cctx))
		1153	next->cctx = cctx_get (aTHX);
		1154
		1155	if (expect_false (prev__cctx != next->cctx))
		1156	{
		1157	prev__cctx->top_env = PL_top_env;
		1158	PL_top_env = next->cctx->top_env;
		1159	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1160	}
		1161
		1162	free_coro_mortal (aTHX);
		1163	UNLOCK;
		1164
		1165	if (expect_false (prev->throw || next->throw))
		1166	{
		1167	struct coro *coro = SvSTATE (coro_current);
		1168
		1169	if (coro->throw)
		1170	{
		1171	SV *exception = coro->throw;
		1172	coro->throw = 0;
		1173	sv_setsv (ERRSV, exception);
		1174	croak (0);
		1175	}
		1176	}
		1177	}
		1178	}
		1179
		1180	struct transfer_args
		1181	{
		1182	struct coro *prev, *next;
		1183	};
		1184
		1185	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1186	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1187
		1188	/** high level stuff ********************************************************/
		1189
		1190	static int
		1191	coro_state_destroy (pTHX_ struct coro *coro)
		1192	{
		1193	if (coro->flags & CF_DESTROYED)
		1194	return 0;
		1195
		1196	coro->flags |= CF_DESTROYED;
		1197
		1198	if (coro->flags & CF_READY)
		1199	{
		1200	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1201	/* alternative: look through all ready queues and remove the coro */
		1202	LOCK;
		1203	--coro_nready;
		1204	UNLOCK;
		1205	}
		1206	else
		1207	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1208
		1209	if (coro->mainstack && coro->mainstack != main_mainstack)
		1210	{
		1211	struct coro temp;
		1212
		1213	if (coro->flags & CF_RUNNING)
		1214	croak ("FATAL: tried to destroy currently running coroutine");
		1215
		1216	save_perl (aTHX_ &temp);
		1217	load_perl (aTHX_ coro);
		1218
		1219	coro_destroy (aTHX_ coro);
		1220
		1221	load_perl (aTHX_ &temp);
		1222
		1223	coro->slot = 0;
		1224	}
		1225
		1226	cctx_destroy (coro->cctx);
		1227	SvREFCNT_dec (coro->args);
		1228
		1229	if (coro->next) coro->next->prev = coro->prev;
		1230	if (coro->prev) coro->prev->next = coro->next;
		1231	if (coro == coro_first) coro_first = coro->next;
		1232
		1233	return 1;
		1234	}
		1235
		1236	static int
		1237	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1238	{
		1239	struct coro *coro = (struct coro *)mg->mg_ptr;
		1240	mg->mg_ptr = 0;
		1241
		1242	coro->hv = 0;
		1243
		1244	if (--coro->refcnt < 0)
		1245	{
		1246	coro_state_destroy (aTHX_ coro);
		1247	Safefree (coro);
		1248	}
		1249
		1250	return 0;
		1251	}
		1252
		1253	static int
		1254	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1255	{
		1256	struct coro *coro = (struct coro *)mg->mg_ptr;
		1257
		1258	++coro->refcnt;
		1259
		1260	return 0;
		1261	}
		1262
		1263	static MGVTBL coro_state_vtbl = {
		1264	0, 0, 0, 0,
		1265	coro_state_free,
		1266	0,
		1267	#ifdef MGf_DUP
		1268	coro_state_dup,
		1269	#else
		1270	# define MGf_DUP 0
		1271	#endif
		1272	};
		1273
		1274	static void
		1275	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1276	{
		1277	ta->prev = SvSTATE (prev_sv);
		1278	ta->next = SvSTATE (next_sv);
		1279	TRANSFER_CHECK (*ta);
		1280	}
		1281
		1282	static void
		1283	api_transfer (SV *prev_sv, SV *next_sv)
		1284	{
		1285	dTHX;
		1286	struct transfer_args ta;
		1287
		1288	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1289	TRANSFER (ta);
		1290	}
		1291
		1292	/** Coro ********************************************************************/
		1293
		1294	static void
		1295	coro_enq (pTHX_ SV *coro_sv)
		1296	{
		1297	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1298	}
		1299
		1300	static SV *
838	coro_deq (int min_prio)	1301	coro_deq (pTHX_ int min_prio)
839	{	1302	{
840	int prio = PRIO_MAX - PRIO_MIN;	1303	int prio = PRIO_MAX - PRIO_MIN;
841		1304
842	min_prio -= PRIO_MIN;	1305	min_prio -= PRIO_MIN;
843	if (min_prio < 0)	1306	if (min_prio < 0)
844	min_prio = 0;	1307	min_prio = 0;
845		1308
846	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1309	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
847	if (av_len (coro_ready[prio]) >= 0)	1310	if (AvFILLp (coro_ready [prio]) >= 0)
848	{
849	coro_nready--;
850	return av_shift (coro_ready[prio]);	1311	return av_shift (coro_ready [prio]);
851	}
852		1312
853	return 0;	1313	return 0;
854	}	1314	}
855		1315
856	static void	1316	static int
857	api_ready (SV *coro)	1317	api_ready (SV *coro_sv)
858	{	1318	{
		1319	dTHX;
		1320	struct coro *coro;
		1321
859	if (SvROK (coro))	1322	if (SvROK (coro_sv))
860	coro = SvRV (coro);	1323	coro_sv = SvRV (coro_sv);
861		1324
		1325	coro = SvSTATE (coro_sv);
		1326
		1327	if (coro->flags & CF_READY)
		1328	return 0;
		1329
		1330	coro->flags |= CF_READY;
		1331
		1332	LOCK;
862	coro_enq (SvREFCNT_inc (coro));	1333	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1334	++coro_nready;
		1335	UNLOCK;
		1336
		1337	return 1;
		1338	}
		1339
		1340	static int
		1341	api_is_ready (SV *coro_sv)
		1342	{
		1343	dTHX;
		1344	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1345	}
		1346
		1347	static void
		1348	prepare_schedule (pTHX_ struct transfer_args *ta)
		1349	{
		1350	SV *prev_sv, *next_sv;
		1351
		1352	for (;;)
		1353	{
		1354	LOCK;
		1355	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1356
		1357	/* nothing to schedule: call the idle handler */
		1358	if (expect_false (!next_sv))
		1359	{
		1360	dSP;
		1361	UNLOCK;
		1362
		1363	ENTER;
		1364	SAVETMPS;
		1365
		1366	PUSHMARK (SP);
		1367	PUTBACK;
		1368	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1369
		1370	FREETMPS;
		1371	LEAVE;
		1372	continue;
		1373	}
		1374
		1375	ta->next = SvSTATE (next_sv);
		1376
		1377	/* cannot transfer to destroyed coros, skip and look for next */
		1378	if (expect_false (ta->next->flags & CF_DESTROYED))
		1379	{
		1380	UNLOCK;
		1381	SvREFCNT_dec (next_sv);
		1382	/* coro_nready is already taken care of by destroy */
		1383	continue;
		1384	}
		1385
		1386	--coro_nready;
		1387	UNLOCK;
		1388	break;
		1389	}
		1390
		1391	/* free this only after the transfer */
		1392	prev_sv = SvRV (coro_current);
		1393	ta->prev = SvSTATE (prev_sv);
		1394	TRANSFER_CHECK (*ta);
		1395	assert (ta->next->flags & CF_READY);
		1396	ta->next->flags &= ~CF_READY;
		1397	SvRV_set (coro_current, next_sv);
		1398
		1399	LOCK;
		1400	free_coro_mortal (aTHX);
		1401	coro_mortal = prev_sv;
		1402	UNLOCK;
		1403	}
		1404
		1405	static void
		1406	prepare_cede (pTHX_ struct transfer_args *ta)
		1407	{
		1408	api_ready (coro_current);
		1409	prepare_schedule (aTHX_ ta);
		1410	}
		1411
		1412	static int
		1413	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1414	{
		1415	if (coro_nready)
		1416	{
		1417	SV *prev = SvRV (coro_current);
		1418	prepare_schedule (aTHX_ ta);
		1419	api_ready (prev);
		1420	return 1;
		1421	}
		1422	else
		1423	return 0;
863	}	1424	}
864		1425
865	static void	1426	static void
866	api_schedule (void)	1427	api_schedule (void)
867	{	1428	{
868	SV *prev, *next;	1429	dTHX;
		1430	struct transfer_args ta;
869		1431
870	prev = SvRV (GvSV (coro_current));	1432	prepare_schedule (aTHX_ &ta);
871	next = coro_deq (PRIO_MIN);	1433	TRANSFER (ta);
872
873	if (!next)
874	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
875
876	/* free this only after the transfer */
877	coro_mortal = prev;
878	SV_CORO (prev, "Coro::schedule");
879
880	SvRV (GvSV (coro_current)) = next;
881
882	SV_CORO (next, "Coro::schedule");
883
884	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
885	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
886	}	1434	}
887		1435
888	static void	1436	static int
889	api_cede (void)	1437	api_cede (void)
890	{	1438	{
891	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1439	dTHX;
		1440	struct transfer_args ta;
892		1441
893	api_schedule ();	1442	prepare_cede (aTHX_ &ta);
894	}
895		1443
		1444	if (expect_true (ta.prev != ta.next))
		1445	{
		1446	TRANSFER (ta);
		1447	return 1;
		1448	}
		1449	else
		1450	return 0;
		1451	}
		1452
		1453	static int
		1454	api_cede_notself (void)
		1455	{
		1456	dTHX;
		1457	struct transfer_args ta;
		1458
		1459	if (prepare_cede_notself (aTHX_ &ta))
		1460	{
		1461	TRANSFER (ta);
		1462	return 1;
		1463	}
		1464	else
		1465	return 0;
		1466	}
		1467
		1468	static void
		1469	api_trace (SV *coro_sv, int flags)
		1470	{
		1471	dTHX;
		1472	struct coro *coro = SvSTATE (coro_sv);
		1473
		1474	if (flags & CC_TRACE)
		1475	{
		1476	if (!coro->cctx)
		1477	coro->cctx = cctx_new ();
		1478	else if (!(coro->cctx->flags & CC_TRACE))
		1479	croak ("cannot enable tracing on coroutine with custom stack");
		1480
		1481	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1482	}
		1483	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1484	{
		1485	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1486
		1487	if (coro->flags & CF_RUNNING)
		1488	PL_runops = RUNOPS_DEFAULT;
		1489	else
		1490	coro->slot->runops = RUNOPS_DEFAULT;
		1491	}
		1492	}
		1493
896	MODULE = Coro::State PACKAGE = Coro::State	1494	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
897		1495
898	PROTOTYPES: ENABLE	1496	PROTOTYPES: DISABLE
899		1497
900	BOOT:	1498	BOOT:
901	{ /* {} necessary for stoopid perl-5.6.x */	1499	{
902	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1500	#ifdef USE_ITHREADS
903	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1501	MUTEX_INIT (&coro_mutex);
		1502	#endif
		1503	BOOT_PAGESIZE;
		1504
		1505	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1506	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1507
		1508	hv_sig = coro_get_hv ("SIG", TRUE);
		1509	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1510	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1511
		1512	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1513	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1514
904	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1515	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
905		1516
906	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
907	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
908	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
909	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
910
911	if (!padlist_cache)
912	padlist_cache = newHV ();
913		1521
914	main_mainstack = PL_mainstack;	1522	main_mainstack = PL_mainstack;
		1523	main_top_env = PL_top_env;
		1524
		1525	while (main_top_env->je_prev)
		1526	main_top_env = main_top_env->je_prev;
915		1527
916	coroapi.ver = CORO_API_VERSION;	1528	coroapi.ver = CORO_API_VERSION;
917	coroapi.transfer = api_transfer;	1529	coroapi.transfer = api_transfer;
918	}
919		1530
920	Coro::State	1531	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
921	_newprocess(args)	1532	}
922	SV * args	1533
923	PROTOTYPE: $	1534	SV *
		1535	new (char *klass, ...)
924	CODE:	1536	CODE:
925	Coro__State coro;	1537	{
		1538	struct coro *coro;
		1539	HV *hv;
		1540	int i;
926		1541
927	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
928	croak ("Coro::State::_newprocess expects an arrayref");
929
930	New (0, coro, 1, struct coro);	1542	Newz (0, coro, 1, struct coro);
		1543	coro->args = newAV ();
		1544	coro->flags = CF_NEW;
931		1545
932	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1546	if (coro_first) coro_first->prev = coro;
933	coro->mainstack = 0; /* actual work is done inside transfer */	1547	coro->next = coro_first;
934	coro->stack = 0;	1548	coro_first = coro;
935		1549
936	/* same as JMPENV_BOOTSTRAP */	1550	coro->hv = hv = newHV ();
937	/* we might be able to recycle start_env, but safe is safe */	1551	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
938	Zero(&coro->start_env, 1, JMPENV);	1552	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
939	coro->start_env.je_ret = -1;
940	coro->start_env.je_mustcatch = TRUE;
941		1553
942	RETVAL = coro;	1554	av_extend (coro->args, items - 1);
		1555	for (i = 1; i < items; i++)
		1556	av_push (coro->args, newSVsv (ST (i)));
		1557	}
943	OUTPUT:	1558	OUTPUT:
944	RETVAL	1559	RETVAL
945		1560
		1561	# these not obviously related functions are all rolled into the same xs
		1562	# function to increase chances that they all will call transfer with the same
		1563	# stack offset
946	void	1564	void
947	transfer(prev, next, flags)	1565	_set_stacklevel (...)
948	SV *prev	1566	ALIAS:
949	SV *next	1567	Coro::State::transfer = 1
950	int flags	1568	Coro::schedule = 2
951	PROTOTYPE: @	1569	Coro::cede = 3
		1570	Coro::cede_notself = 4
952	CODE:	1571	CODE:
953	PUTBACK;	1572	{
954	SV_CORO (next, "Coro::transfer");	1573	struct transfer_args ta;
955	SV_CORO (prev, "Coro::transfer");	1574
956	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1575	switch (ix)
957	SPAGAIN;	1576	{
		1577	case 0:
		1578	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1579	ta.next = 0;
		1580	break;
		1581
		1582	case 1:
		1583	if (items != 2)
		1584	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1585
		1586	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1587	break;
		1588
		1589	case 2:
		1590	prepare_schedule (aTHX_ &ta);
		1591	break;
		1592
		1593	case 3:
		1594	prepare_cede (aTHX_ &ta);
		1595	break;
		1596
		1597	case 4:
		1598	if (!prepare_cede_notself (aTHX_ &ta))
		1599	XSRETURN_EMPTY;
		1600
		1601	break;
		1602	}
		1603
		1604	BARRIER;
		1605	TRANSFER (ta);
		1606
		1607	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1608	XSRETURN_YES;
		1609	}
		1610
		1611	bool
		1612	_destroy (SV *coro_sv)
		1613	CODE:
		1614	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1615	OUTPUT:
		1616	RETVAL
958		1617
959	void	1618	void
960	DESTROY(coro)
961	Coro::State coro
962	CODE:
963
964	if (coro->mainstack && coro->mainstack != main_mainstack)
965	{
966	struct coro temp;
967
968	PUTBACK;
969	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
970	LOAD(aTHX_ coro);
971	SPAGAIN;
972
973	destroy_stacks (aTHX);
974
975	LOAD((&temp)); /* this will get rid of defsv etc.. */
976	SPAGAIN;
977
978	coro->mainstack = 0;
979	}
980
981	deallocate_stack (coro);
982
983	Safefree (coro);
984
985	void
986	flush()
987	CODE:
988	#ifdef MAY_FLUSH
989	flush_padlist_cache ();
990	#endif
991
992	void
993	_exit(code)	1619	_exit (code)
994	int code	1620	int code
995	PROTOTYPE: $	1621	PROTOTYPE: $
996	CODE:	1622	CODE:
997	#if defined(__GLIBC__) || _POSIX_C_SOURCE
998	_exit (code);	1623	_exit (code);
999	#else
1000	signal (SIGTERM, SIG_DFL);
1001	raise (SIGTERM);
1002	exit (code);
1003	#endif
1004		1624
1005	MODULE = Coro::State PACKAGE = Coro::Cont	1625	int
		1626	cctx_stacksize (int new_stacksize = 0)
		1627	CODE:
		1628	RETVAL = coro_stacksize;
		1629	if (new_stacksize)
		1630	coro_stacksize = new_stacksize;
		1631	OUTPUT:
		1632	RETVAL
1006		1633
1007	# this is slightly dirty (should expose a c-level api)	1634	int
		1635	cctx_count ()
		1636	CODE:
		1637	RETVAL = cctx_count;
		1638	OUTPUT:
		1639	RETVAL
		1640
		1641	int
		1642	cctx_idle ()
		1643	CODE:
		1644	RETVAL = cctx_idle;
		1645	OUTPUT:
		1646	RETVAL
1008		1647
1009	void	1648	void
1010	yield(...)	1649	list ()
1011	PROTOTYPE: @	1650	PPCODE:
		1651	{
		1652	struct coro *coro;
		1653	for (coro = coro_first; coro; coro = coro->next)
		1654	if (coro->hv)
		1655	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1656	}
		1657
		1658	void
		1659	call (Coro::State coro, SV *coderef)
		1660	ALIAS:
		1661	eval = 1
		1662	CODE:
		1663	{
		1664	if (coro->mainstack)
		1665	{
		1666	struct coro temp;
		1667
		1668	if (!(coro->flags & CF_RUNNING))
		1669	{
		1670	save_perl (aTHX_ &temp);
		1671	load_perl (aTHX_ coro);
		1672	}
		1673
		1674	{
		1675	dSP;
		1676	ENTER;
		1677	SAVETMPS;
		1678	PUSHMARK (SP);
		1679	PUTBACK;
		1680
		1681	if (ix)
		1682	eval_sv (coderef, 0);
		1683	else
		1684	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1685
		1686	SPAGAIN;
		1687	FREETMPS;
		1688	LEAVE;
		1689	PUTBACK;
		1690	}
		1691
		1692	if (!(coro->flags & CF_RUNNING))
		1693	{
		1694	save_perl (aTHX_ coro);
		1695	load_perl (aTHX_ &temp);
		1696	}
		1697	}
		1698	}
		1699
		1700	SV *
		1701	is_ready (Coro::State coro)
		1702	PROTOTYPE: $
		1703	ALIAS:
		1704	is_ready = CF_READY
		1705	is_running = CF_RUNNING
		1706	is_new = CF_NEW
		1707	is_destroyed = CF_DESTROYED
		1708	CODE:
		1709	RETVAL = boolSV (coro->flags & ix);
		1710	OUTPUT:
		1711	RETVAL
		1712
		1713	void
		1714	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1715
		1716	SV *
		1717	has_stack (Coro::State coro)
		1718	PROTOTYPE: $
		1719	CODE:
		1720	RETVAL = boolSV (!!coro->cctx);
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	int
		1725	is_traced (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	IV
		1733	rss (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	usecount = 1
1012	CODE:	1737	CODE:
1013	static SV *returnstk;	1738	switch (ix)
1014	SV *sv;	1739	{
1015	AV *defav = GvAV (PL_defgv);	1740	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1016	struct coro *prev, *next;	1741	case 1: RETVAL = coro->usecount; break;
		1742	}
		1743	OUTPUT:
		1744	RETVAL
1017		1745
1018	if (!returnstk)
1019	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1020
1021	/* set up @_ -- ugly */
1022	av_clear (defav);
1023	av_fill (defav, items - 1);
1024	while (items--)
1025	av_store (defav, items, SvREFCNT_inc (ST(items)));
1026
1027	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1028	sv = av_pop ((AV *)SvRV (returnstk));
1029	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1030	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1031	SvREFCNT_dec (sv);
1032
1033	transfer(aTHX_ prev, next, 0);
1034		1746
1035	MODULE = Coro::State PACKAGE = Coro	1747	MODULE = Coro::State PACKAGE = Coro
1036		1748
1037	# this is slightly dirty (should expose a c-level api)
1038
1039	BOOT:	1749	BOOT:
1040	{	1750	{
1041	int i;	1751	int i;
		1752
		1753	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1754	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1755	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1756
		1757	coro_current = coro_get_sv ("Coro::current", FALSE);
		1758	SvREADONLY_on (coro_current);
		1759
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1760	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1761
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1762	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1763	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1764	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1765	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1766	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1767	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053		1768
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1769	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1770	coro_ready[i] = newAV ();
1056		1771
1057	{	1772	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1773	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1774	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1059		1775
1060	coroapi.schedule = api_schedule;	1776	coroapi.schedule = api_schedule;
1061	coroapi.cede = api_cede;	1777	coroapi.cede = api_cede;
		1778	coroapi.cede_notself = api_cede_notself;
1062	coroapi.ready = api_ready;	1779	coroapi.ready = api_ready;
		1780	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1781	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1782	coroapi.current = coro_current;
1065		1783
1066	GCoroAPI = &coroapi;	1784	GCoroAPI = &coroapi;
1067	sv_setiv(sv, (IV)&coroapi);	1785	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on(sv);	1786	SvREADONLY_on (sv);
1069	}	1787	}
1070	}	1788	}
1071		1789
1072	void	1790	void
1073	ready(self)	1791	_set_current (SV *current)
1074	SV * self
1075	PROTOTYPE: $	1792	PROTOTYPE: $
1076	CODE:	1793	CODE:
1077	api_ready (self);	1794	SvREFCNT_dec (SvRV (coro_current));
		1795	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1078		1796
1079	int	1797	int
		1798	prio (Coro::State coro, int newprio = 0)
		1799	ALIAS:
		1800	nice = 1
		1801	CODE:
		1802	{
		1803	RETVAL = coro->prio;
		1804
		1805	if (items > 1)
		1806	{
		1807	if (ix)
		1808	newprio = coro->prio - newprio;
		1809
		1810	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1811	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1812
		1813	coro->prio = newprio;
		1814	}
		1815	}
		1816	OUTPUT:
		1817	RETVAL
		1818
		1819	SV *
		1820	ready (SV *self)
		1821	PROTOTYPE: $
		1822	CODE:
		1823	RETVAL = boolSV (api_ready (self));
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	int
1080	nready(...)	1828	nready (...)
1081	PROTOTYPE:	1829	PROTOTYPE:
1082	CODE:	1830	CODE:
1083	RETVAL = coro_nready;	1831	RETVAL = coro_nready;
1084	OUTPUT:	1832	OUTPUT:
1085	RETVAL	1833	RETVAL
1086		1834
1087	void	1835	void
1088	schedule(...)	1836	throw (Coro::State self, SV *throw = &PL_sv_undef)
1089	PROTOTYPE:	1837	PROTOTYPE: $;$
		1838	CODE:
		1839	SvREFCNT_dec (self->throw);
		1840	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1841
		1842	# for async_pool speedup
		1843	void
		1844	_pool_1 (SV *cb)
1090	CODE:	1845	CODE:
1091	api_schedule ();	1846	{
		1847	struct coro *coro = SvSTATE (coro_current);
		1848	HV *hv = (HV *)SvRV (coro_current);
		1849	AV *defav = GvAV (PL_defgv);
		1850	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1851	AV *invoke_av;
		1852	int i, len;
		1853
		1854	if (!invoke)
		1855	croak ("\3async_pool terminate\2\n");
		1856
		1857	SvREFCNT_dec (coro->saved_deffh);
		1858	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1859
		1860	hv_store (hv, "desc", sizeof ("desc") - 1,
		1861	newSVpvn (strpair ("[async_pool]")), 0);
		1862
		1863	invoke_av = (AV *)SvRV (invoke);
		1864	len = av_len (invoke_av);
		1865
		1866	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1867
		1868	if (len > 0)
		1869	{
		1870	av_fill (defav, len - 1);
		1871	for (i = 0; i < len; ++i)
		1872	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1873	}
		1874
		1875	SvREFCNT_dec (invoke);
		1876	}
1092		1877
1093	void	1878	void
1094	cede(...)	1879	_pool_2 (SV *cb)
1095	PROTOTYPE:
1096	CODE:	1880	CODE:
1097	api_cede ();	1881	{
		1882	struct coro *coro = SvSTATE (coro_current);
1098		1883
		1884	sv_setsv (cb, &PL_sv_undef);
		1885
		1886	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1887	coro->saved_deffh = 0;
		1888
		1889	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1890	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1891	croak ("\3async_pool terminate\2\n");
		1892
		1893	av_clear (GvAV (PL_defgv));
		1894	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1895	newSVpvn (strpair ("[async_pool idle]")), 0);
		1896
		1897	coro->prio = 0;
		1898
		1899	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1900	api_trace (coro_current, 0);
		1901
		1902	av_push (av_async_pool, newSVsv (coro_current));
		1903	}
		1904
		1905
		1906	MODULE = Coro::State PACKAGE = Coro::AIO
		1907
		1908	SV *
		1909	_get_state ()
		1910	CODE:
		1911	{
		1912	struct io_state *data;
		1913
		1914	RETVAL = newSV (sizeof (struct io_state));
		1915	data = (struct io_state *)SvPVX (RETVAL);
		1916	SvCUR_set (RETVAL, sizeof (struct io_state));
		1917	SvPOK_only (RETVAL);
		1918
		1919	data->errorno = errno;
		1920	data->laststype = PL_laststype;
		1921	data->laststatval = PL_laststatval;
		1922	data->statcache = PL_statcache;
		1923	}
		1924	OUTPUT:
		1925	RETVAL
		1926
		1927	void
		1928	_set_state (char *data_)
		1929	PROTOTYPE: $
		1930	CODE:
		1931	{
		1932	struct io_state *data = (void *)data_;
		1933
		1934	errno = data->errorno;
		1935	PL_laststype = data->laststype;
		1936	PL_laststatval = data->laststatval;
		1937	PL_statcache = data->statcache;
		1938	}
		1939

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