[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.26 by root, Fri Aug 17 01:45:39 2001 UTC vs.
Revision 1.205 by root, Tue Oct 9 14:07:02 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_ANON
13	# ifdef MAP_ANONYMOUS	19	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	20	# ifdef 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 */	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 delcare 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 labs(l) ((l) >= 0 ? (l) : -(l))	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		108
		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))
32		123
33	#include "CoroAPI.h"	124	#include "CoroAPI.h"
34		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;
35	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 */
36		152
37	/* 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 */
38	typedef struct {	205	typedef struct {
39	int refcnt; /* pointer reference counter */	206	SV *defsv;
40	int usecnt; /* shared by how many coroutines */	207	AV *defav;
41	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;
42		214
43	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
44		216
45	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
46	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48
49	struct coro {	218	struct coro {
50	/* the optional C context */	219	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	220	coro_cctx *cctx;
52	void *cursp;
53	int gencnt;
54		221
55	/* optionally saved, might be zero */	222	/* process data */
56	AV *defav;
57	SV *defsv;
58	SV *errsv;
59
60	/* saved global state not related to stacks */
61	U8 dowarn;
62	I32 in_eval;
63
64	/* the stacks and related info (callchain etc..) */
65	PERL_SI *curstackinfo;
66	AV *curstack;
67	AV *mainstack;	223	AV *mainstack;
68	SV **stack_sp;	224	perl_slots slot; / basically the saved sp */
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91		225
92	/* data associated with this coroutine (initial args) */	226	AV args; / data associated with this coroutine (initial args) */
93	AV *args;	227	int refcnt; /* coroutines are refcounted, yes */
		228	int flags; /* CF_ flags */
		229	HV hv; / the perl hash associated with this coro, if any */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV throw; / exception to be thrown */
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro next, prev;
94	};	243	};
95		244
96	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
98
99	static AV main_mainstack; / used to differentiate between $main and others */
100	static HV *coro_state_stash;
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104
105	/* mostly copied from op.c:cv_clone2 */
106	STATIC AV *
107	clone_padlist (AV *protopadlist)
108	{
109	AV *av;
110	I32 ix;
111	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
112	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV newpadlist, newpad_name, *newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127
128	newpadlist = newAV ();
129	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);
131	av_store (newpadlist, 1, (SV *) newpad);
132
133	av = newAV (); /* will be @_ */
134	av_extend (av, 0);
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137
138	for (ix = fpad; ix > 0; ix--)
139	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141	if (namesv && namesv != &PL_sv_undef)
142	{
143	char name = SvPVX (namesv); / XXX */
144	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}
148	else
149	{ /* our own lexical */
150	SV *sv;
151	if (*name == '&')
152	sv = SvREFCNT_inc (ppad[ix]);
153	else if (*name == '@')
154	sv = (SV *) newAV ();
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}
163	}
164	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
165	{
166	npad[ix] = SvREFCNT_inc (ppad[ix]);
167	}
168	else
169	{
170	SV *sv = NEWSV (0, 0);
171	SvPADTMP_on (sv);
172	npad[ix] = sv;
173	}
174	}
175
176	#if 0 /* return -ENOTUNDERSTOOD */
177	/* Now that vars are all in place, clone nested closures. */
178
179	for (ix = fpad; ix > 0; ix--) {
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181	if (namesv
182	&& namesv != &PL_sv_undef
183	&& !(SvFLAGS(namesv) & SVf_FAKE)
184	&& *SvPVX(namesv) == '&'
185	&& CvCLONE(ppad[ix]))
186	{
187	CV kid = cv_clone((CV)ppad[ix]);
188	SvREFCNT_dec(ppad[ix]);
189	CvCLONE_on(kid);
190	SvPADMY_on(kid);
191	npad[ix] = (SV*)kid;
192	}
193	}
194	#endif
195
196	return newpadlist;
197	}
198
199	#ifdef MAY_FLUSH
200	STATIC AV *
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV sv = svp ? svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214
215	SvREFCNT_dec((SV*)padlist);
216	}
217	}
218	#endif
219
220	/* the next two functions merely cache the padlists */
221	STATIC void
222	get_padlist (CV *cv)
223	{
224	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
225
226	if (he && AvFILLp ((AV )he) >= 0)
227	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
228	else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230	}
231
232	STATIC void
233	put_padlist (CV *cv)
234	{
235	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
236
237	if (SvTYPE (*he) != SVt_PVAV)
238	{
239	SvREFCNT_dec (*he);
240	he = (SV )newAV ();
241	}
242
243	av_push ((AV )he, (SV *)CvPADLIST (cv));
244	}
245
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{
255	HE *he;
256	AV *padlist;
257
258	while (!!(he = hv_iternext (hv)))
259	{
260	AV av = (AV )HeVAL(he);
261
262	/* casting is fun. */
263	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
264	free_padlist (padlist);
265	}
266	}
267
268	SvREFCNT_dec (hv);
269	}
270	#endif
271
272	#define SB do {
273	#define SE } while (0)
274
275	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280	static void
281	load_state(pTHX_ Coro__State c)
282	{
283	PL_dowarn = c->dowarn;
284	PL_in_eval = c->in_eval;
285
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317	{
318	dSP;
319	CV *cv;
320
321	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))
323	{
324	AV padlist = (AV )POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;
330	#ifdef USE_THREADS
331	/CvOWNER(cv) = (struct perl_thread )POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}
337
338	PUTBACK;
339	}
340	}
341
342	static void
343	save_state(pTHX_ Coro__State c, int flags)
344	{
345	{
346	dSP;
347	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;
349	PERL_SI *top_si = PL_curstackinfo;
350
351	/*
352	* the worst thing you can imagine happens first - we have to save
353	* (and reinitialize) all cv's in the whole callchain :(
354	*/
355
356	PUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */
358	for (;;)
359	{
360	do
361	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];
363
364	if (CxTYPE(cx) == CXt_SUB)
365	{
366	CV *cv = cx->blk_sub.cv;
367	if (CvDEPTH(cv))
368	{
369	#ifdef USE_THREADS
370	/XPUSHs ((SV )CvOWNER(cv));*/
371	/CvOWNER(cv) = 0;/
372	/error must unlock this cv etc.. etc.../
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);
375
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382
383	PUSHs ((SV *)CvPADLIST(cv));
384	PUSHs ((SV *)cv);
385
386	get_padlist (cv); /* this is a monster */
387	}
388	}
389	else if (CxTYPE(cx) == CXt_FORMAT)
390	{
391	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}
395	}
396	while (cxix >= 0);
397
398	if (top_si->si_type == PERLSI_MAIN)
399	break;
400
401	top_si = top_si->si_prev;
402	ccstk = top_si->si_cxstack;
403	cxix = top_si->si_cxix;
404	}
405
406	PUTBACK;
407	}
408
409	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413	/* I have not the slightest idea of why av_reify is necessary */
414	/* but if it's missing the defav contents magically get replaced sometimes */
415	if (c->defav)
416	av_reify (c->defav);
417
418	c->dowarn = PL_dowarn;
419	c->in_eval = PL_in_eval;
420
421	c->curstackinfo = PL_curstackinfo;
422	c->curstack = PL_curstack;
423	c->mainstack = PL_mainstack;
424	c->stack_sp = PL_stack_sp;
425	c->op = PL_op;
426	c->curpad = PL_curpad;
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	/* is this ugly, I ask? */
499	while (PL_scopestack_ix)
500	LEAVE;
501
502	/* sure it is, but more important: is it correct?? :/ */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;
505
506	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;
508
509	while (PL_curstackinfo)
510	{
511	PERL_SI *p = PL_curstackinfo->si_prev;
512
513	{
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520	dounwind(-1);
521
522	SvREFCNT_dec(PL_curstackinfo->si_stack);
523	Safefree(PL_curstackinfo->si_cxstack);
524	Safefree(PL_curstackinfo);
525	PL_curstackinfo = p;
526	}
527
528	Safefree(PL_tmps_stack);
529	Safefree(PL_markstack);
530	Safefree(PL_scopestack);
531	Safefree(PL_savestack);
532	Safefree(PL_retstack);
533	}
534
535	static void
536	allocate_stack (Coro__State ctx, int alloc)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545	if (alloc)
546	{
547	#ifdef HAVE_MMAP
548	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
550	if (stack->sptr == (void *)-1)
551	#endif
552	{
553	/FIXME//D//* reasonable stack size! */
554	stack->ssize = -4096 * sizeof (long);
555	New (0, stack->sptr, 4096, long);
556	}
557	}
558	else
559	stack->sptr = 0;
560
561	ctx->stack = stack;
562	}
563
564	static void
565	deallocate_stack (Coro__State ctx)
566	{
567	coro_stack *stack = ctx->stack;
568
569	ctx->stack = 0;
570
571	if (stack)
572	{
573	if (!--stack->refcnt)
574	{
575	#ifdef HAVE_MMAP
576	if (stack->ssize > 0 && stack->sptr)
577	munmap (stack->sptr, stack->ssize);
578	else
579	#else
580	Safefree (stack->sptr);
581	#endif
582	Safefree (stack);
583	}
584	else if (ctx->gencnt == stack->gencnt)
585	--stack->usecnt;
586	}
587	}
588
589	static void
590	setup_coro (void *arg)
591	{
592	/*
593	* emulate part of the perl startup here.
594	*/
595	dSP;
596	Coro__State ctx = (Coro__State)arg;
597	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
598
599	coro_init_stacks (aTHX);
600	/PL_curcop = 0;/
601	/PL_in_eval = PL_in_eval;/ /* inherit */
602	SvREFCNT_dec (GvAV (PL_defgv));
603	GvAV (PL_defgv) = ctx->args;
604
605	SPAGAIN;
606
607	if (ctx->stack)
608	{
609	ctx->cursp = 0;
610
611	PUSHMARK(SP);
612	PUTBACK;
613	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
614
615	if (SvTRUE (ERRSV))
616	croak (NULL);
617	else
618	croak ("FATAL: CCTXT coroutine returned!");
619	}
620	else
621	{
622	UNOP myop;
623
624	PL_op = (OP *)&myop;
625
626	Zero(&myop, 1, UNOP);
627	myop.op_next = Nullop;
628	myop.op_flags = OPf_WANT_VOID;
629
630	PUSHMARK(SP);
631	XPUSHs (sub_init);
632	/*
633	* the next line is slightly wrong, as PL_op->op_next
634	* is actually being executed so we skip the first op.
635	* that doesn't matter, though, since it is only
636	* pp_nextstate and we never return...
637	* ah yes, and I don't care anyways ;)
638	*/
639	PUTBACK;
640	PL_op = pp_entersub();
641	SPAGAIN;
642
643	ENTER; /* necessary e.g. for dounwind */
644	}
645	}
646
647	static void
648	continue_coro (void *arg)
649	{
650	/*
651	* this is a _very_ stripped down perl interpreter ;)
652	*/
653	Coro__State ctx = (Coro__State)arg;
654
655	/FIXME//* must set up top_env here */
656	ctx->cursp = 0;
657	PL_op = PL_op->op_next;
658	CALLRUNOPS(aTHX);
659
660	abort ();
661	}
662
663	STATIC void
664	transfer(pTHX_ struct coro prev, struct coro next, int flags)
665	{
666	dSP;
667	dSTACKLEVEL;
668
669	if (prev != next)
670	{
671	if (next->mainstack)
672	{
673	SAVE (prev, flags);
674	LOAD (next);
675
676	/* mark this state as in-use */
677	next->mainstack = 0;
678	next->tmps_ix = -2;
679
680	/* stacklevel changed? if yes, grab the stack for us! */
681	if (flags & TRANSFER_SAVE_CCTXT)
682	{
683	if (!prev->stack)
684	allocate_stack (prev, 0);
685	else if (prev->cursp != stacklevel
686	&& prev->stack->usecnt > 1)
687	{
688	prev->gencnt = ++prev->stack->gencnt;
689	prev->stack->usecnt = 1;
690	}
691
692	/* has our stack been invalidated? */
693	if (next->stack && next->stack->gencnt != next->gencnt)
694	{
695	deallocate_stack (next);
696	allocate_stack (next, 1);
697	coro_create (&(next->stack->cctx),
698	continue_coro, (void *)next,
699	next->stack->sptr, labs (next->stack->ssize));
700	}
701
702	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703	}
704
705	}
706	else if (next->tmps_ix == -2)
707	croak ("tried to transfer to running coroutine");
708	else
709	{
710	SAVE (prev, -1); /* first get rid of the old state */
711
712	if (flags & TRANSFER_SAVE_CCTXT)
713	{
714	if (!prev->stack)
715	allocate_stack (prev, 0);
716
717	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718	{
719	setup_coro (next);
720
721	prev->stack->refcnt++;
722	prev->stack->usecnt++;
723	next->stack = prev->stack;
724	next->gencnt = prev->gencnt;
725	}
726	else
727	{
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	setup_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	}
734	}
735	else
736	setup_coro (next);
737	}
738	}
739
740	next->cursp = stacklevel;
741	}
742
743	static struct coro *
744	sv_to_coro (SV arg, const char funcname, const char *varname)
745	{
746	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
747	{
748	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
749
750	if (!he)
751	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
752
753	arg = HeVAL(he);
754	}
755
756	/* must also be changed inside Coro::Cont::yield */
757	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758	return (struct coro ) SvIV((SV)SvRV(arg));
759	else
760	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761	}
762
763	static void
764	api_transfer(pTHX_ SV prev, SV next, int flags)
765	{
766	transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
767	sv_to_coro (next, "Coro::transfer", "next"),
768	flags);
769	}
770		247
771	/ Coro ******************************************************************/	248	/ Coro ******************************************************************/
772		249
773	#define PRIO_MAX 3	250	#define PRIO_MAX 3
774	#define PRIO_HIGH 1	251	#define PRIO_HIGH 1
776	#define PRIO_LOW -1	253	#define PRIO_LOW -1
777	#define PRIO_IDLE -3	254	#define PRIO_IDLE -3
778	#define PRIO_MIN -4	255	#define PRIO_MIN -4
779		256
780	/* for Coro.pm */	257	/* for Coro.pm */
781	static GV coro_current, coro_idle;	258	static SV *coro_current;
782	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	259	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
783	static int coro_nready;	260	static int coro_nready;
		261	static struct coro *coro_first;
784		262
785	static void	263	/ lowlevel stuff ********************************************************/
786	coro_enq (SV *sv)	264
		265	static SV *
		266	coro_get_sv (const char *name, int create)
787	{	267	{
788	if (SvROK (sv))	268	#if PERL_VERSION_ATLEAST (5,9,0)
		269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		270	get_sv (name, create);
		271	#endif
		272	return get_sv (name, create);
		273	}
		274
		275	static AV *
		276	coro_get_av (const char *name, int create)
		277	{
		278	#if PERL_VERSION_ATLEAST (5,9,0)
		279	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		280	get_av (name, create);
		281	#endif
		282	return get_av (name, create);
		283	}
		284
		285	static HV *
		286	coro_get_hv (const char *name, int create)
		287	{
		288	#if PERL_VERSION_ATLEAST (5,9,0)
		289	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		290	get_hv (name, create);
		291	#endif
		292	return get_hv (name, create);
		293	}
		294
		295	static AV *
		296	coro_clone_padlist (pTHX_ CV *cv)
		297	{
		298	AV *padlist = CvPADLIST (cv);
		299	AV newpadlist, newpad;
		300
		301	newpadlist = newAV ();
		302	AvREAL_off (newpadlist);
		303	#if PERL_VERSION_ATLEAST (5,9,0)
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		305	#else
		306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		307	#endif
		308	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		309	--AvFILLp (padlist);
		310
		311	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		312	av_store (newpadlist, 1, (SV *)newpad);
		313
		314	return newpadlist;
		315	}
		316
		317	static void
		318	free_padlist (pTHX_ AV *padlist)
		319	{
		320	/* may be during global destruction */
		321	if (SvREFCNT (padlist))
789	{	322	{
790	SV *hv = SvRV (sv);	323	I32 i = AvFILLp (padlist);
791	if (SvTYPE (hv) == SVt_PVHV)	324	while (i >= 0)
792	{	325	{
793	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);	326	SV **svp = av_fetch (padlist, i--, FALSE);
794	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;	327	if (svp)
		328	{
		329	SV *sv;
		330	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		331	SvREFCNT_dec (sv);
795		332
796	prio = prio > PRIO_MAX ? PRIO_MAX	333	SvREFCNT_dec (*svp);
797	: prio < PRIO_MIN ? PRIO_MIN	334	}
798	: prio;
799
800	av_push (coro_ready [prio - PRIO_MIN], sv);
801	coro_nready++;
802
803	return;
804	}	335	}
		336
		337	SvREFCNT_dec ((SV*)padlist);
		338	}
		339	}
		340
		341	static int
		342	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		343	{
		344	AV *padlist;
		345	AV av = (AV )mg->mg_obj;
		346
		347	/* casting is fun. */
		348	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		349	free_padlist (aTHX_ padlist);
		350
		351	SvREFCNT_dec (av);
		352
		353	return 0;
		354	}
		355
		356	#define PERL_MAGIC_coro PERL_MAGIC_ext
		357
		358	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		359
		360	#define CORO_MAGIC(cv) \
		361	SvMAGIC (cv) \
		362	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		363	? SvMAGIC (cv) \
		364	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		365	: 0
		366
		367	static struct coro *
		368	SvSTATE_ (pTHX_ SV *coro)
		369	{
		370	HV *stash;
		371	MAGIC *mg;
		372
		373	if (SvROK (coro))
		374	coro = SvRV (coro);
		375
		376	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		377	croak ("Coro::State object required");
		378
		379	stash = SvSTASH (coro);
		380	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		381	{
		382	/* very slow, but rare, check */
		383	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		384	croak ("Coro::State object required");
		385	}
		386
		387	mg = CORO_MAGIC (coro);
		388	return (struct coro *)mg->mg_ptr;
		389	}
		390
		391	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		392
		393	/* the next two functions merely cache the padlists */
		394	static void
		395	get_padlist (pTHX_ CV *cv)
		396	{
		397	MAGIC *mg = CORO_MAGIC (cv);
		398	AV *av;
		399
		400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
		401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		402	else
		403	{
		404	#if CORO_PREFER_PERL_FUNCTIONS
		405	/* this is probably cleaner, but also slower? */
		406	CV *cp = Perl_cv_clone (cv);
		407	CvPADLIST (cv) = CvPADLIST (cp);
		408	CvPADLIST (cp) = 0;
		409	SvREFCNT_dec (cp);
		410	#else
		411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		412	#endif
805	}	413	}
		414	}
806		415
807	croak ("Coro::ready tried to enqueue something that is not a coroutine");	416	static void
		417	put_padlist (pTHX_ CV *cv)
		418	{
		419	MAGIC *mg = CORO_MAGIC (cv);
		420	AV *av;
		421
		422	if (expect_false (!mg))
		423	{
		424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		426	mg->mg_virtual = &vtbl_coro;
		427	mg->mg_obj = (SV *)newAV ();
		428	}
		429
		430	av = (AV *)mg->mg_obj;
		431
		432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		433	av_extend (av, AvMAX (av) + 1);
		434
		435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		436	}
		437
		438	/ load & save, init *****************************************************/
		439
		440	static void
		441	load_perl (pTHX_ Coro__State c)
		442	{
		443	perl_slots *slot = c->slot;
		444	c->slot = 0;
		445
		446	PL_mainstack = c->mainstack;
		447
		448	GvSV (PL_defgv) = slot->defsv;
		449	GvAV (PL_defgv) = slot->defav;
		450	GvSV (PL_errgv) = slot->errsv;
		451	GvSV (irsgv) = slot->irsgv;
		452
		453	#define VAR(name,type) PL_ ## name = slot->name;
		454	# include "state.h"
		455	#undef VAR
		456
		457	/hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);/
		458	/hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);/
		459
		460	{
		461	dSP;
		462
		463	CV *cv;
		464
		465	/* now do the ugly restore mess */
		466	while (expect_true (cv = (CV *)POPs))
		467	{
		468	put_padlist (aTHX_ cv); /* mark this padlist as available */
		469	CvDEPTH (cv) = PTR2IV (POPs);
		470	CvPADLIST (cv) = (AV *)POPs;
		471	}
		472
		473	PUTBACK;
		474	}
		475	}
		476
		477	static void
		478	save_perl (pTHX_ Coro__State c)
		479	{
		480	{
		481	dSP;
		482	I32 cxix = cxstack_ix;
		483	PERL_CONTEXT *ccstk = cxstack;
		484	PERL_SI *top_si = PL_curstackinfo;
		485
		486	/*
		487	* the worst thing you can imagine happens first - we have to save
		488	* (and reinitialize) all cv's in the whole callchain :(
		489	*/
		490
		491	XPUSHs (Nullsv);
		492	/* this loop was inspired by pp_caller */
		493	for (;;)
		494	{
		495	while (expect_true (cxix >= 0))
		496	{
		497	PERL_CONTEXT *cx = &ccstk[cxix--];
		498
		499	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
		500	{
		501	CV *cv = cx->blk_sub.cv;
		502
		503	if (expect_true (CvDEPTH (cv)))
		504	{
		505	EXTEND (SP, 3);
		506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
		508	PUSHs ((SV *)cv);
		509
		510	CvDEPTH (cv) = 0;
		511	get_padlist (aTHX_ cv);
		512	}
		513	}
		514	}
		515
		516	if (expect_true (top_si->si_type == PERLSI_MAIN))
		517	break;
		518
		519	top_si = top_si->si_prev;
		520	ccstk = top_si->si_cxstack;
		521	cxix = top_si->si_cxix;
		522	}
		523
		524	PUTBACK;
		525	}
		526
		527	/* allocate some space on the context stack for our purposes */
		528	/* we manually unroll here, as usually 2 slots is enough */
		529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		543
		544	slot->defav = GvAV (PL_defgv);
		545	slot->defsv = DEFSV;
		546	slot->errsv = ERRSV;
		547	slot->irsgv = GvSV (irsgv);
		548
		549	#define VAR(name,type) slot->name = PL_ ## name;
		550	# include "state.h"
		551	#undef VAR
		552	}
		553	}
		554
		555	/*
		556	* allocate various perl stacks. This is an exact copy
		557	* of perl.c:init_stacks, except that it uses less memory
		558	* on the (sometimes correct) assumption that coroutines do
		559	* not usually need a lot of stackspace.
		560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
		564	static void
		565	coro_init_stacks (pTHX)
		566	{
		567	PL_curstackinfo = new_stackinfo(32, 8);
		568	PL_curstackinfo->si_type = PERLSI_MAIN;
		569	PL_curstack = PL_curstackinfo->si_stack;
		570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		571
		572	PL_stack_base = AvARRAY(PL_curstack);
		573	PL_stack_sp = PL_stack_base;
		574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		575
		576	New(50,PL_tmps_stack,32,SV*);
		577	PL_tmps_floor = -1;
		578	PL_tmps_ix = -1;
		579	PL_tmps_max = 32;
		580
		581	New(54,PL_markstack,16,I32);
		582	PL_markstack_ptr = PL_markstack;
		583	PL_markstack_max = PL_markstack + 16;
		584
		585	#ifdef SET_MARK_OFFSET
		586	SET_MARK_OFFSET;
		587	#endif
		588
		589	New(54,PL_scopestack,8,I32);
		590	PL_scopestack_ix = 0;
		591	PL_scopestack_max = 8;
		592
		593	New(54,PL_savestack,24,ANY);
		594	PL_savestack_ix = 0;
		595	PL_savestack_max = 24;
		596
		597	#if !PERL_VERSION_ATLEAST (5,9,0)
		598	New(54,PL_retstack,4,OP*);
		599	PL_retstack_ix = 0;
		600	PL_retstack_max = 4;
		601	#endif
		602	}
		603	#endif
		604
		605	/*
		606	* destroy the stacks, the callchain etc...
		607	*/
		608	static void
		609	coro_destroy_stacks (pTHX)
		610	{
		611	while (PL_curstackinfo->si_next)
		612	PL_curstackinfo = PL_curstackinfo->si_next;
		613
		614	while (PL_curstackinfo)
		615	{
		616	PERL_SI *p = PL_curstackinfo->si_prev;
		617
		618	if (!IN_DESTRUCT)
		619	SvREFCNT_dec (PL_curstackinfo->si_stack);
		620
		621	Safefree (PL_curstackinfo->si_cxstack);
		622	Safefree (PL_curstackinfo);
		623	PL_curstackinfo = p;
		624	}
		625
		626	Safefree (PL_tmps_stack);
		627	Safefree (PL_markstack);
		628	Safefree (PL_scopestack);
		629	Safefree (PL_savestack);
		630	#if !PERL_VERSION_ATLEAST (5,9,0)
		631	Safefree (PL_retstack);
		632	#endif
		633	}
		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/ coroutine stack handling **********************************************/
		673
		674	static void
		675	coro_setup (pTHX_ struct coro *coro)
		676	{
		677	/*
		678	* emulate part of the perl startup here.
		679	*/
		680	coro_init_stacks (aTHX);
		681
		682	PL_runops = RUNOPS_DEFAULT;
		683	PL_curcop = &PL_compiling;
		684	PL_in_eval = EVAL_NULL;
		685	PL_comppad = 0;
		686	PL_curpm = 0;
		687	PL_curpad = 0;
		688	PL_localizing = 0;
		689	PL_dirty = 0;
		690	PL_restartop = 0;
		691	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		692	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		693
		694	GvSV (PL_defgv) = newSV (0);
		695	GvAV (PL_defgv) = coro->args; coro->args = 0;
		696	GvSV (PL_errgv) = newSV (0);
		697	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		698	PL_rs = newSVsv (GvSV (irsgv));
		699	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		700
		701	{
		702	dSP;
		703	LOGOP myop;
		704
		705	Zero (&myop, 1, LOGOP);
		706	myop.op_next = Nullop;
		707	myop.op_flags = OPf_WANT_VOID;
		708
		709	PUSHMARK (SP);
		710	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		711	PUTBACK;
		712	PL_op = (OP *)&myop;
		713	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		714	SPAGAIN;
		715	}
		716
		717	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		718	}
		719
		720	static void
		721	coro_destroy (pTHX_ struct coro *coro)
		722	{
		723	if (!IN_DESTRUCT)
		724	{
		725	/* restore all saved variables and stuff */
		726	LEAVE_SCOPE (0);
		727	assert (PL_tmps_floor == -1);
		728
		729	/* free all temporaries */
		730	FREETMPS;
		731	assert (PL_tmps_ix == -1);
		732
		733	/* unwind all extra stacks */
		734	POPSTACK_TO (PL_mainstack);
		735
		736	/* unwind main stack */
		737	dounwind (-1);
		738	}
		739
		740	SvREFCNT_dec (GvSV (PL_defgv));
		741	SvREFCNT_dec (GvAV (PL_defgv));
		742	SvREFCNT_dec (GvSV (PL_errgv));
		743	SvREFCNT_dec (PL_defoutgv);
		744	SvREFCNT_dec (PL_rs);
		745	SvREFCNT_dec (GvSV (irsgv));
		746
		747	SvREFCNT_dec (PL_diehook);
		748	SvREFCNT_dec (PL_warnhook);
		749
		750	SvREFCNT_dec (coro->saved_deffh);
		751	SvREFCNT_dec (coro->throw);
		752
		753	coro_destroy_stacks (aTHX);
		754	}
		755
		756	static void
		757	free_coro_mortal (pTHX)
		758	{
		759	if (expect_true (coro_mortal))
		760	{
		761	SvREFCNT_dec (coro_mortal);
		762	coro_mortal = 0;
		763	}
		764	}
		765
		766	static int
		767	runops_trace (pTHX)
		768	{
		769	COP *oldcop = 0;
		770	int oldcxix = -2;
		771	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		772	coro_cctx *cctx = coro->cctx;
		773
		774	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		775	{
		776	PERL_ASYNC_CHECK ();
		777
		778	if (cctx->flags & CC_TRACE_ALL)
		779	{
		780	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		781	{
		782	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		783	SV bot, top;
		784	AV av = newAV (); / return values */
		785	SV **cb;
		786	dSP;
		787
		788	GV *gv = CvGV (cx->blk_sub.cv);
		789	SV *fullname = sv_2mortal (newSV (0));
		790	if (isGV (gv))
		791	gv_efullname3 (fullname, gv, 0);
		792
		793	bot = PL_stack_base + cx->blk_oldsp + 1;
		794	top = cx->blk_gimme == G_ARRAY ? SP + 1
		795	: cx->blk_gimme == G_SCALAR ? bot + 1
		796	: bot;
		797
		798	av_extend (av, top - bot);
		799	while (bot < top)
		800	av_push (av, SvREFCNT_inc (*bot++));
		801
		802	PL_runops = RUNOPS_DEFAULT;
		803	ENTER;
		804	SAVETMPS;
		805	EXTEND (SP, 3);
		806	PUSHMARK (SP);
		807	PUSHs (&PL_sv_no);
		808	PUSHs (fullname);
		809	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		810	PUTBACK;
		811	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		812	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		813	SPAGAIN;
		814	FREETMPS;
		815	LEAVE;
		816	PL_runops = runops_trace;
		817	}
		818
		819	if (oldcop != PL_curcop)
		820	{
		821	oldcop = PL_curcop;
		822
		823	if (PL_curcop != &PL_compiling)
		824	{
		825	SV **cb;
		826
		827	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		828	{
		829	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		830
		831	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		832	{
		833	runops_proc_t old_runops = PL_runops;
		834	dSP;
		835	GV *gv = CvGV (cx->blk_sub.cv);
		836	SV *fullname = sv_2mortal (newSV (0));
		837
		838	if (isGV (gv))
		839	gv_efullname3 (fullname, gv, 0);
		840
		841	PL_runops = RUNOPS_DEFAULT;
		842	ENTER;
		843	SAVETMPS;
		844	EXTEND (SP, 3);
		845	PUSHMARK (SP);
		846	PUSHs (&PL_sv_yes);
		847	PUSHs (fullname);
		848	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		849	PUTBACK;
		850	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		851	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		852	SPAGAIN;
		853	FREETMPS;
		854	LEAVE;
		855	PL_runops = runops_trace;
		856	}
		857
		858	oldcxix = cxstack_ix;
		859	}
		860
		861	if (cctx->flags & CC_TRACE_LINE)
		862	{
		863	dSP;
		864
		865	PL_runops = RUNOPS_DEFAULT;
		866	ENTER;
		867	SAVETMPS;
		868	EXTEND (SP, 3);
		869	PL_runops = RUNOPS_DEFAULT;
		870	PUSHMARK (SP);
		871	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		872	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		873	PUTBACK;
		874	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		875	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		876	SPAGAIN;
		877	FREETMPS;
		878	LEAVE;
		879	PL_runops = runops_trace;
		880	}
		881	}
		882	}
		883	}
		884	}
		885
		886	TAINT_NOT;
		887	return 0;
		888	}
		889
		890	/* inject a fake call to Coro::State::_cctx_init into the execution */
		891	/* _cctx_init should be careful, as it could be called at almost any time */
		892	/* during execution of a perl program */
		893	static void NOINLINE
		894	cctx_prepare (pTHX_ coro_cctx *cctx)
		895	{
		896	dSP;
		897	LOGOP myop;
		898
		899	PL_top_env = &PL_start_env;
		900
		901	if (cctx->flags & CC_TRACE)
		902	PL_runops = runops_trace;
		903
		904	Zero (&myop, 1, LOGOP);
		905	myop.op_next = PL_op;
		906	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		907
		908	PUSHMARK (SP);
		909	EXTEND (SP, 2);
		910	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		911	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		912	PUTBACK;
		913	PL_op = (OP *)&myop;
		914	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		915	SPAGAIN;
		916	}
		917
		918	/*
		919	* this is a _very_ stripped down perl interpreter ;)
		920	*/
		921	static void
		922	cctx_run (void *arg)
		923	{
		924	dTHX;
		925
		926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		927	UNLOCK;
		928
		929	/* we now skip the entersub that lead to transfer() */
		930	PL_op = PL_op->op_next;
		931
		932	/* inject a fake subroutine call to cctx_init */
		933	cctx_prepare (aTHX_ (coro_cctx *)arg);
		934
		935	/* somebody or something will hit me for both perl_run and PL_restartop */
		936	PL_restartop = PL_op;
		937	perl_run (PL_curinterp);
		938
		939	/*
		940	* If perl-run returns we assume exit() was being called or the coro
		941	* fell off the end, which seems to be the only valid (non-bug)
		942	* reason for perl_run to return. We try to exit by jumping to the
		943	* bootstrap-time "top" top_env, as we cannot restore the "main"
		944	* coroutine as Coro has no such concept
		945	*/
		946	PL_top_env = main_top_env;
		947	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		948	}
		949
		950	static coro_cctx *
		951	cctx_new ()
		952	{
		953	coro_cctx *cctx;
		954	void *stack_start;
		955	size_t stack_size;
		956
		957	++cctx_count;
		958	fprintf (stderr, "bp1\n");//D
		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);
808	}	1298	}
809		1299
810	static SV *	1300	static SV *
811	coro_deq (int min_prio)	1301	coro_deq (pTHX_ int min_prio)
812	{	1302	{
813	int prio = PRIO_MAX - PRIO_MIN;	1303	int prio = PRIO_MAX - PRIO_MIN;
814		1304
815	min_prio -= PRIO_MIN;	1305	min_prio -= PRIO_MIN;
816	if (min_prio < 0)	1306	if (min_prio < 0)
817	min_prio = 0;	1307	min_prio = 0;
818		1308
819	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1309	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
820	if (av_len (coro_ready[prio]) >= 0)	1310	if (AvFILLp (coro_ready [prio]) >= 0)
821	{
822	coro_nready--;
823	return av_shift (coro_ready[prio]);	1311	return av_shift (coro_ready [prio]);
824	}
825		1312
826	return 0;	1313	return 0;
827	}	1314	}
828		1315
829	static void	1316	static int
830	api_ready (SV *coro)	1317	api_ready (SV *coro_sv)
831	{	1318	{
		1319	dTHX;
		1320	struct coro *coro;
		1321
		1322	if (SvROK (coro_sv))
		1323	coro_sv = SvRV (coro_sv);
		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;
832	coro_enq (SvREFCNT_inc (coro));	1333	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
833	}	1334	++coro_nready;
		1335	UNLOCK;
834		1336
		1337	return 1;
		1338	}
		1339
835	static void	1340	static int
836	api_schedule (int cede)	1341	api_is_ready (SV *coro_sv)
837	{	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	{
838	SV prev, next;	1350	SV prev_sv, next_sv;
839		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 */
840	prev = GvSV (coro_current);	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);
841		1398
842	if (cede)	1399	LOCK;
843	coro_enq (SvREFCNT_inc (prev));	1400	free_coro_mortal (aTHX);
844		1401	coro_mortal = prev_sv;
845	next = coro_deq (PRIO_MIN);	1402	UNLOCK;
846
847	if (!next)
848	next = SvREFCNT_inc (GvSV (coro_idle));
849
850	GvSV (coro_current) = SvREFCNT_inc (next);
851	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
852	sv_to_coro (next, "Coro::schedule", "next coroutine"),
853	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
854	SvREFCNT_dec (next);
855	SvREFCNT_dec (prev);
856	}	1403	}
857		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;
		1424	}
		1425
		1426	static void
		1427	api_schedule (void)
		1428	{
		1429	dTHX;
		1430	struct transfer_args ta;
		1431
		1432	prepare_schedule (aTHX_ &ta);
		1433	TRANSFER (ta);
		1434	}
		1435
		1436	static int
		1437	api_cede (void)
		1438	{
		1439	dTHX;
		1440	struct transfer_args ta;
		1441
		1442	prepare_cede (aTHX_ &ta);
		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
858	MODULE = Coro::State PACKAGE = Coro::State	1494	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
859		1495
860	PROTOTYPES: ENABLE	1496	PROTOTYPES: DISABLE
861		1497
862	BOOT:	1498	BOOT:
863	{ /* {} necessary for stoopid perl-5.6.x */	1499	{
864	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1500	#ifdef USE_ITHREADS
865	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
866	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1515	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867		1516
868	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
869	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
870	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
871	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
872
873	if (!padlist_cache)
874	padlist_cache = newHV ();
875		1521
876	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;
877		1527
878	coroapi.ver = CORO_API_VERSION;	1528	coroapi.ver = CORO_API_VERSION;
879	coroapi.transfer = api_transfer;	1529	coroapi.transfer = api_transfer;
880	}
881		1530
882	Coro::State	1531	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
883	_newprocess(args)	1532	}
884	SV * args	1533
885	PROTOTYPE: $	1534	SV *
		1535	new (char *klass, ...)
886	CODE:	1536	CODE:
887	Coro__State coro;	1537	{
		1538	struct coro *coro;
		1539	HV *hv;
		1540	int i;
888		1541
889	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
890	croak ("Coro::State::_newprocess expects an arrayref");
891
892	New (0, coro, 1, struct coro);	1542	Newz (0, coro, 1, struct coro);
		1543	coro->args = newAV ();
		1544	coro->flags = CF_NEW;
893		1545
894	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1546	if (coro_first) coro_first->prev = coro;
895	coro->mainstack = 0; /* actual work is done inside transfer */	1547	coro->next = coro_first;
896	coro->stack = 0;	1548	coro_first = coro;
897		1549
898	RETVAL = coro;	1550	coro->hv = hv = newHV ();
		1551	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1552	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1553
		1554	av_extend (coro->args, items - 1);
		1555	for (i = 1; i < items; i++)
		1556	av_push (coro->args, newSVsv (ST (i)));
		1557	}
899	OUTPUT:	1558	OUTPUT:
900	RETVAL	1559	RETVAL
901		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
902	void	1564	void
903	transfer(prev, next, flags)	1565	_set_stacklevel (...)
904	Coro::State_or_hashref prev	1566	ALIAS:
905	Coro::State_or_hashref next	1567	Coro::State::transfer = 1
906	int flags	1568	Coro::schedule = 2
907	PROTOTYPE: @	1569	Coro::cede = 3
		1570	Coro::cede_notself = 4
908	CODE:	1571	CODE:
909	PUTBACK;	1572	{
910	transfer (aTHX_ prev, next, flags);	1573	struct transfer_args ta;
911	SPAGAIN;	1574
		1575	switch (ix)
		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
912		1617
913	void	1618	void
914	DESTROY(coro)
915	Coro::State coro
916	CODE:
917
918	if (coro->mainstack && coro->mainstack != main_mainstack)
919	{
920	struct coro temp;
921
922	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
923	LOAD(aTHX_ coro);
924
925	destroy_stacks (aTHX);
926
927	LOAD((&temp)); /* this will get rid of defsv etc.. */
928
929	coro->mainstack = 0;
930	}
931
932	deallocate_stack (coro);
933
934	Safefree (coro);
935
936	void
937	flush()
938	CODE:
939	#ifdef MAY_FLUSH
940	flush_padlist_cache ();
941	#endif
942
943	void
944	_exit(code)	1619	_exit (code)
945	int code	1620	int code
946	PROTOTYPE: $	1621	PROTOTYPE: $
947	CODE:	1622	CODE:
948	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
949	_exit (code);	1623	_exit (code);
950	#else
951	signal (SIGTERM, SIG_DFL);
952	raise (SIGTERM);
953	exit (code);
954	#endif
955		1624
956	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
957		1633
958	# 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
959		1647
960	void	1648	void
961	yield(...)	1649	list ()
962	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
963	CODE:	1737	CODE:
964	static SV *returnstk;	1738	switch (ix)
965	SV *sv;	1739	{
966	AV *defav = GvAV (PL_defgv);	1740	case 0: RETVAL = coro_rss (aTHX_ coro); break;
967	struct coro prev, next;	1741	case 1: RETVAL = coro->usecount; break;
		1742	}
		1743	OUTPUT:
		1744	RETVAL
968		1745
969	if (!returnstk)
970	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
971
972	/* set up @_ -- ugly */
973	av_clear (defav);
974	av_fill (defav, items - 1);
975	while (items--)
976	av_store (defav, items, SvREFCNT_inc (ST(items)));
977
978	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
979	sv = av_pop ((AV *)SvRV (returnstk));
980	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
981	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
982	SvREFCNT_dec (sv);
983
984	transfer(aTHX_ prev, next, 0);
985		1746
986	MODULE = Coro::State PACKAGE = Coro	1747	MODULE = Coro::State PACKAGE = Coro
987		1748
988	# this is slightly dirty (should expose a c-level api)
989
990	BOOT:	1749	BOOT:
991	{	1750	{
992	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
993	HV *stash = gv_stashpv ("Coro", TRUE);	1760	coro_stash = gv_stashpv ("Coro", TRUE);
994		1761
995	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1762	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
996	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1763	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
997	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1764	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
998	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1765	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
999	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1766	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1000	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1767	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1001
1002	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1003	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1004		1768
1005	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1769	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1006	coro_ready[i] = newAV ();	1770	coro_ready[i] = newAV ();
1007		1771
1008	{	1772	{
1009	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 */
1010		1775
1011	coroapi.schedule = api_schedule;	1776	coroapi.schedule = api_schedule;
		1777	coroapi.cede = api_cede;
		1778	coroapi.cede_notself = api_cede_notself;
1012	coroapi.ready = api_ready;	1779	coroapi.ready = api_ready;
		1780	coroapi.is_ready = api_is_ready;
1013	coroapi.nready = &coro_nready;	1781	coroapi.nready = &coro_nready;
1014	coroapi.current = coro_current;	1782	coroapi.current = coro_current;
1015		1783
1016	GCoroAPI = &coroapi;	1784	GCoroAPI = &coroapi;
1017	sv_setiv(sv, (IV)&coroapi);	1785	sv_setiv (sv, (IV)&coroapi);
1018	SvREADONLY_on(sv);	1786	SvREADONLY_on (sv);
1019	}	1787	}
1020	}	1788	}
1021		1789
1022	void	1790	void
1023	ready(self)	1791	_set_current (SV *current)
1024	SV * self	1792	PROTOTYPE: $
1025	CODE:	1793	CODE:
1026	api_ready (self);	1794	SvREFCNT_dec (SvRV (coro_current));
		1795	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1027		1796
1028	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
1029	nready(...)	1828	nready (...)
1030	PROTOTYPE:	1829	PROTOTYPE:
1031	CODE:	1830	CODE:
1032	RETVAL = coro_nready;	1831	RETVAL = coro_nready;
1033	OUTPUT:	1832	OUTPUT:
1034	RETVAL	1833	RETVAL
1035		1834
1036	void	1835	void
1037	schedule(...)	1836	throw (Coro::State self, SV *throw = &PL_sv_undef)
1038	PROTOTYPE:	1837	PROTOTYPE: $;$
1039	ALIAS:	1838	CODE:
1040	cede = 1	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)
1041	CODE:	1845	CODE:
1042	api_schedule (ix);	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;
1043		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	}
		1877
		1878	void
		1879	_pool_2 (SV *cb)
		1880	CODE:
		1881	{
		1882	struct coro *coro = SvSTATE (coro_current);
		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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Comparing Coro/Coro/State.xs (file contents): Revision 1.26 by root, Fri Aug 17 01:45:39 2001 UTC vs. Revision 1.205 by root, Tue Oct 9 14:07:02 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.26 by root, Fri Aug 17 01:45:39 2001 UTC vs.
Revision 1.205 by root, Tue Oct 9 14:07:02 2007 UTC