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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.42 by root, Mon Dec 31 20:41:45 2001 UTC vs.
Revision 1.199 by root, Sun Oct 7 13:53:37 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	/* helper storage struct for Coro::AIO */
		136	struct io_state
		137	{
		138	int errorno;
		139	I32 laststype;
		140	int laststatval;
		141	Stat_t statcache;
		142	};
		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
37	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
		146	static AV main_mainstack; / used to differentiate between $main and others */
		147	static JMPENV *main_top_env;
		148	static HV coro_state_stash, coro_stash;
		149	static SV coro_mortal; / will be freed after next transfer */
38		150
39	/* this is actually not only the c stack but also c registers etc... */	151	static GV irsgv; / $/ */
		152	static GV stdoutgv; / STDOUT /
		153	static SV *sv_diehook;
		154	static SV *sv_warnhook;
		155
		156	/* async_pool helper stuff */
		157	static SV *sv_pool_rss;
		158	static SV *sv_pool_size;
		159	static AV *av_async_pool;
		160
		161	static struct coro_cctx *cctx_first;
		162	static int cctx_count, cctx_idle;
		163
		164	enum {
		165	CC_MAPPED = 0x01,
		166	CC_NOREUSE = 0x02, /* throw this away after tracing */
		167	CC_TRACE = 0x04,
		168	CC_TRACE_SUB = 0x08, /* trace sub calls */
		169	CC_TRACE_LINE = 0x10, /* trace each statement */
		170	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		171	};
		172
		173	/* this is a structure representing a c-level coroutine */
		174	typedef struct coro_cctx {
		175	struct coro_cctx *next;
		176
		177	/* the stack */
		178	void *sptr;
		179	size_t ssize;
		180
		181	/* cpu state */
		182	void idle_sp; / sp of top-level transfer/schedule/cede call */
		183	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		184	JMPENV *top_env;
		185	coro_context cctx;
		186
		187	#if CORO_USE_VALGRIND
		188	int valgrind_id;
		189	#endif
		190	unsigned char flags;
		191	} coro_cctx;
		192
		193	enum {
		194	CF_RUNNING = 0x0001, /* coroutine is running */
		195	CF_READY = 0x0002, /* coroutine is ready */
		196	CF_NEW = 0x0004, /* has never been switched to */
		197	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		198	};
		199
		200	/* the structure where most of the perl state is stored, overlaid on the cxstack */
40	typedef struct {	201	typedef struct {
41	int refcnt; /* pointer reference counter */	202	SV *defsv;
42	int usecnt; /* shared by how many coroutines */	203	AV *defav;
43	int gencnt; /* generation counter */	204	SV *errsv;
		205	SV *irsgv;
		206	#define VAR(name,type) type name;
		207	# include "state.h"
		208	#undef VAR
		209	} perl_slots;
44		210
45	coro_context cctx;	211	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
46		212
47	void *sptr;	213	/* this is a structure representing a perl-level coroutine */
48	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50
51	struct coro {	214	struct coro {
52	/* the optional C context */	215	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	216	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56		217
57	/* optionally saved, might be zero */	218	/* process data */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;	219	AV *mainstack;
70	SV **stack_sp;	220	perl_slots slot; / basically the saved sp */
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	JMPENV *top_env;
93		221
94	/* data associated with this coroutine (initial args) */	222	/* data associated with this coroutine (initial args) */
95	AV *args;	223	AV *args;
		224	int refcnt;
		225	int flags; /* CF_ flags */
		226
		227	/* statistics */
		228	int usecount; /* number of transfers to this coro */
		229
		230	/* coro process data */
		231	int prio;
		232	SV *throw;
		233
		234	/* async_pool */
		235	SV *saved_deffh;
		236
		237	/* linked list */
		238	struct coro next, prev;
		239	HV hv; / the perl hash associated with this coro, if any */
96	};	240	};
97		241
98	typedef struct coro *Coro__State;	242	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	243	typedef struct coro *Coro__State_or_hashref;
100
101	static AV main_mainstack; / used to differentiate between $main and others */
102	static HV *coro_state_stash;
103	static SV *ucoro_state_sv;
104	static U32 ucoro_state_hash;
105	static HV *padlist_cache;
106	static SV coro_mortal; / will be freed after next transfer */
107
108	/* mostly copied from op.c:cv_clone2 */
109	STATIC AV *
110	clone_padlist (AV *protopadlist)
111	{
112	AV *av;
113	I32 ix;
114	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
115	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
116	SV **pname = AvARRAY (protopad_name);
117	SV **ppad = AvARRAY (protopad);
118	I32 fname = AvFILLp (protopad_name);
119	I32 fpad = AvFILLp (protopad);
120	AV newpadlist, newpad_name, *newpad;
121	SV **npad;
122
123	newpad_name = newAV ();
124	for (ix = fname; ix >= 0; ix--)
125	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
126
127	newpad = newAV ();
128	av_fill (newpad, AvFILLp (protopad));
129	npad = AvARRAY (newpad);
130
131	newpadlist = newAV ();
132	AvREAL_off (newpadlist);
133	av_store (newpadlist, 0, (SV *) newpad_name);
134	av_store (newpadlist, 1, (SV *) newpad);
135
136	av = newAV (); /* will be @_ */
137	av_extend (av, 0);
138	av_store (newpad, 0, (SV *) av);
139	AvFLAGS (av) = AVf_REIFY;
140
141	for (ix = fpad; ix > 0; ix--)
142	{
143	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
144	if (namesv && namesv != &PL_sv_undef)
145	{
146	char name = SvPVX (namesv); / XXX */
147	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
148	{ /* lexical from outside? */
149	npad[ix] = SvREFCNT_inc (ppad[ix]);
150	}
151	else
152	{ /* our own lexical */
153	SV *sv;
154	if (*name == '&')
155	sv = SvREFCNT_inc (ppad[ix]);
156	else if (*name == '@')
157	sv = (SV *) newAV ();
158	else if (*name == '%')
159	sv = (SV *) newHV ();
160	else
161	sv = NEWSV (0, 0);
162	if (!SvPADBUSY (sv))
163	SvPADMY_on (sv);
164	npad[ix] = sv;
165	}
166	}
167	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
168	{
169	npad[ix] = SvREFCNT_inc (ppad[ix]);
170	}
171	else
172	{
173	SV *sv = NEWSV (0, 0);
174	SvPADTMP_on (sv);
175	npad[ix] = sv;
176	}
177	}
178
179	#if 0 /* return -ENOTUNDERSTOOD */
180	/* Now that vars are all in place, clone nested closures. */
181
182	for (ix = fpad; ix > 0; ix--) {
183	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
184	if (namesv
185	&& namesv != &PL_sv_undef
186	&& !(SvFLAGS(namesv) & SVf_FAKE)
187	&& *SvPVX(namesv) == '&'
188	&& CvCLONE(ppad[ix]))
189	{
190	CV kid = cv_clone((CV)ppad[ix]);
191	SvREFCNT_dec(ppad[ix]);
192	CvCLONE_on(kid);
193	SvPADMY_on(kid);
194	npad[ix] = (SV*)kid;
195	}
196	}
197	#endif
198
199	return newpadlist;
200	}
201
202	#ifdef MAY_FLUSH
203	STATIC void
204	free_padlist (AV *padlist)
205	{
206	/* may be during global destruction */
207	if (SvREFCNT(padlist))
208	{
209	I32 i = AvFILLp(padlist);
210	while (i >= 0)
211	{
212	SV **svp = av_fetch(padlist, i--, FALSE);
213	SV sv = svp ? svp : Nullsv;
214	if (sv)
215	SvREFCNT_dec(sv);
216	}
217
218	SvREFCNT_dec((SV*)padlist);
219	}
220	}
221	#endif
222
223	/* the next two functions merely cache the padlists */
224	STATIC void
225	get_padlist (CV *cv)
226	{
227	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
228
229	if (he && AvFILLp ((AV )he) >= 0)
230	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
231	else
232	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
233	}
234
235	STATIC void
236	put_padlist (CV *cv)
237	{
238	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
239
240	if (SvTYPE (*he) != SVt_PVAV)
241	{
242	SvREFCNT_dec (*he);
243	he = (SV )newAV ();
244	}
245
246	av_push ((AV )he, (SV *)CvPADLIST (cv));
247	}
248
249	#ifdef MAY_FLUSH
250	STATIC void
251	flush_padlist_cache ()
252	{
253	HV *hv = padlist_cache;
254	padlist_cache = newHV ();
255
256	if (hv_iterinit (hv))
257	{
258	HE *he;
259	AV *padlist;
260
261	while (!!(he = hv_iternext (hv)))
262	{
263	AV av = (AV )HeVAL(he);
264
265	/* casting is fun. */
266	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
267	free_padlist (padlist);
268	}
269	}
270
271	SvREFCNT_dec (hv);
272	}
273	#endif
274
275	#define SB do {
276	#define SE } while (0)
277
278	#define LOAD(state) load_state(aTHX_ (state));
279	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
280
281	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
282
283	static void
284	load_state(pTHX_ Coro__State c)
285	{
286	PL_dowarn = c->dowarn;
287	PL_in_eval = c->in_eval;
288
289	PL_curstackinfo = c->curstackinfo;
290	PL_curstack = c->curstack;
291	PL_mainstack = c->mainstack;
292	PL_stack_sp = c->stack_sp;
293	PL_op = c->op;
294	PL_curpad = c->curpad;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	PL_retstack = c->retstack;
311	PL_retstack_ix = c->retstack_ix;
312	PL_retstack_max = c->retstack_max;
313	PL_curcop = c->curcop;
314	PL_top_env = c->top_env;
315
316	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
317	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
318	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
319
320	{
321	dSP;
322	CV *cv;
323
324	/* now do the ugly restore mess */
325	while ((cv = (CV *)POPs))
326	{
327	AV padlist = (AV )POPs;
328
329	if (padlist)
330	{
331	put_padlist (cv); /* mark this padlist as available */
332	CvPADLIST(cv) = padlist;
333	#ifdef USE_THREADS
334	/CvOWNER(cv) = (struct perl_thread )POPs;*/
335	#endif
336	}
337
338	++CvDEPTH(cv);
339	}
340
341	PUTBACK;
342	}
343	}
344
345	static void
346	save_state(pTHX_ Coro__State c, int flags)
347	{
348	{
349	dSP;
350	I32 cxix = cxstack_ix;
351	PERL_CONTEXT *ccstk = cxstack;
352	PERL_SI *top_si = PL_curstackinfo;
353
354	/*
355	* the worst thing you can imagine happens first - we have to save
356	* (and reinitialize) all cv's in the whole callchain :(
357	*/
358
359	PUSHs (Nullsv);
360	/* this loop was inspired by pp_caller */
361	for (;;)
362	{
363	while (cxix >= 0)
364	{
365	PERL_CONTEXT *cx = &ccstk[cxix--];
366
367	if (CxTYPE(cx) == CXt_SUB)
368	{
369	CV *cv = cx->blk_sub.cv;
370	if (CvDEPTH(cv))
371	{
372	#ifdef USE_THREADS
373	/XPUSHs ((SV )CvOWNER(cv));*/
374	/CvOWNER(cv) = 0;/
375	/error must unlock this cv etc.. etc.../
376	#endif
377	EXTEND (SP, CvDEPTH(cv)*2);
378
379	while (--CvDEPTH(cv))
380	{
381	/* this tells the restore code to increment CvDEPTH */
382	PUSHs (Nullsv);
383	PUSHs ((SV *)cv);
384	}
385
386	PUSHs ((SV *)CvPADLIST(cv));
387	PUSHs ((SV *)cv);
388
389	get_padlist (cv); /* this is a monster */
390	}
391	}
392	else if (CxTYPE(cx) == CXt_FORMAT)
393	{
394	/* I never used formats, so how should I know how these are implemented? */
395	/* my bold guess is as a simple, plain sub... */
396	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
397	}
398	}
399
400	if (top_si->si_type == PERLSI_MAIN)
401	break;
402
403	top_si = top_si->si_prev;
404	ccstk = top_si->si_cxstack;
405	cxix = top_si->si_cxix;
406	}
407
408	PUTBACK;
409	}
410
411	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
412	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
413	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
414
415	c->dowarn = PL_dowarn;
416	c->in_eval = PL_in_eval;
417
418	c->curstackinfo = PL_curstackinfo;
419	c->curstack = PL_curstack;
420	c->mainstack = PL_mainstack;
421	c->stack_sp = PL_stack_sp;
422	c->op = PL_op;
423	c->curpad = PL_curpad;
424	c->stack_base = PL_stack_base;
425	c->stack_max = PL_stack_max;
426	c->tmps_stack = PL_tmps_stack;
427	c->tmps_floor = PL_tmps_floor;
428	c->tmps_ix = PL_tmps_ix;
429	c->tmps_max = PL_tmps_max;
430	c->markstack = PL_markstack;
431	c->markstack_ptr = PL_markstack_ptr;
432	c->markstack_max = PL_markstack_max;
433	c->scopestack = PL_scopestack;
434	c->scopestack_ix = PL_scopestack_ix;
435	c->scopestack_max = PL_scopestack_max;
436	c->savestack = PL_savestack;
437	c->savestack_ix = PL_savestack_ix;
438	c->savestack_max = PL_savestack_max;
439	c->retstack = PL_retstack;
440	c->retstack_ix = PL_retstack_ix;
441	c->retstack_max = PL_retstack_max;
442	c->curcop = PL_curcop;
443	c->top_env = PL_top_env;
444	}
445
446	/*
447	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory
449	* on the assumption that coroutines do not usually need
450	* a lot of stackspace.
451	*/
452	STATIC void
453	coro_init_stacks (pTHX)
454	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
456	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459
460	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463
464	New(50,PL_tmps_stack,96,SV*);
465	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;
467	PL_tmps_max = 96;
468
469	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;
472
473	SET_MARK_OFFSET;
474
475	New(54,PL_scopestack,16,I32);
476	PL_scopestack_ix = 0;
477	PL_scopestack_max = 16;
478
479	New(54,PL_savestack,96,ANY);
480	PL_savestack_ix = 0;
481	PL_savestack_max = 96;
482
483	New(54,PL_retstack,8,OP*);
484	PL_retstack_ix = 0;
485	PL_retstack_max = 8;
486	}
487
488	/*
489	* destroy the stacks, the callchain etc...
490	* still there is a memleak of 128 bytes...
491	*/
492	STATIC void
493	destroy_stacks(pTHX)
494	{
495	if (!IN_DESTRUCT)
496	{
497	/* is this ugly, I ask? */
498	while (PL_scopestack_ix)
499	LEAVE;
500
501	/* sure it is, but more important: is it correct?? :/ */
502	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
503	FREETMPS;
504	}
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 (!IN_DESTRUCT)
520	{
521	dounwind(-1);
522	SvREFCNT_dec(PL_curstackinfo->si_stack);
523	}
524
525	Safefree(PL_curstackinfo->si_cxstack);
526	Safefree(PL_curstackinfo);
527	PL_curstackinfo = p;
528	}
529
530	Safefree(PL_tmps_stack);
531	Safefree(PL_markstack);
532	Safefree(PL_scopestack);
533	Safefree(PL_savestack);
534	Safefree(PL_retstack);
535	}
536
537	static void
538	allocate_stack (Coro__State ctx, int alloc)
539	{
540	coro_stack *stack;
541
542	New (0, stack, 1, coro_stack);
543
544	stack->refcnt = 1;
545	stack->usecnt = 1;
546	stack->gencnt = ctx->gencnt = 0;
547	if (alloc)
548	{
549	#if HAVE_MMAP
550	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
552	if (stack->sptr == (void *)-1)
553	#endif
554	{
555	/FIXME//D//* reasonable stack size! */
556	stack->ssize = -4096 * sizeof (long);
557	New (0, stack->sptr, 4096, long);
558	}
559	}
560	else
561	stack->sptr = 0;
562
563	ctx->stack = stack;
564	}
565
566	static void
567	deallocate_stack (Coro__State ctx)
568	{
569	coro_stack *stack = ctx->stack;
570
571	ctx->stack = 0;
572
573	if (stack)
574	{
575	if (!--stack->refcnt)
576	{
577	#ifdef HAVE_MMAP
578	if (stack->ssize > 0 && stack->sptr)
579	munmap (stack->sptr, stack->ssize);
580	else
581	#else
582	Safefree (stack->sptr);
583	#endif
584	Safefree (stack);
585	}
586	else if (ctx->gencnt == stack->gencnt)
587	--stack->usecnt;
588	}
589	}
590
591	static void
592	setup_coro (void *arg)
593	{
594	/*
595	* emulate part of the perl startup here.
596	*/
597	dSP;
598	Coro__State ctx = (Coro__State)arg;
599	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
600
601	coro_init_stacks (aTHX);
602	/PL_curcop = 0;/
603	/PL_in_eval = PL_in_eval;/ /* inherit */
604	SvREFCNT_dec (GvAV (PL_defgv));
605	GvAV (PL_defgv) = ctx->args;
606
607	SPAGAIN;
608
609	if (ctx->stack)
610	{
611	ctx->cursp = 0;
612
613	PUSHMARK(SP);
614	PUTBACK;
615	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
616
617	if (SvTRUE (ERRSV))
618	croak (NULL);
619	else
620	croak ("FATAL: CCTXT coroutine returned!");
621	}
622	else
623	{
624	UNOP myop;
625
626	PL_op = (OP *)&myop;
627
628	Zero(&myop, 1, UNOP);
629	myop.op_next = Nullop;
630	myop.op_flags = OPf_WANT_VOID;
631
632	PUSHMARK(SP);
633	XPUSHs (sub_init);
634	/*
635	* the next line is slightly wrong, as PL_op->op_next
636	* is actually being executed so we skip the first op.
637	* that doesn't matter, though, since it is only
638	* pp_nextstate and we never return...
639	* ah yes, and I don't care anyways ;)
640	*/
641	PUTBACK;
642	PL_op = PL_ppaddr[OP_ENTERSUB]();
643	SPAGAIN;
644
645	ENTER; /* necessary e.g. for dounwind */
646	}
647	}
648
649	static void
650	continue_coro (void *arg)
651	{
652	/*
653	* this is a _very_ stripped down perl interpreter ;)
654	*/
655	Coro__State ctx = (Coro__State)arg;
656	JMPENV coro_start_env;
657
658	/* same as JMPENV_BOOTSTRAP */
659	Zero(&coro_start_env, 1, JMPENV);
660	coro_start_env.je_ret = -1;
661	coro_start_env.je_mustcatch = TRUE;
662	PL_top_env = &coro_start_env;
663
664	ctx->cursp = 0;
665	PL_op = PL_op->op_next;
666	CALLRUNOPS(aTHX);
667
668	abort ();
669	}
670
671	STATIC void
672	transfer(pTHX_ struct coro prev, struct coro next, int flags)
673	{
674	dSTACKLEVEL;
675	static struct coro *xnext;
676
677	if (prev != next)
678	{
679	xnext = next;
680
681	if (next->mainstack)
682	{
683	SAVE (prev, flags);
684	LOAD (next);
685
686	/* mark this state as in-use */
687	next->mainstack = 0;
688	next->tmps_ix = -2;
689
690	/* stacklevel changed? if yes, grab the stack for us! */
691	if (flags & TRANSFER_SAVE_CCTXT)
692	{
693	if (!prev->stack)
694	allocate_stack (prev, 0);
695	else if (prev->cursp != stacklevel
696	&& prev->stack->usecnt > 1)
697	{
698	prev->gencnt = ++prev->stack->gencnt;
699	prev->stack->usecnt = 1;
700	}
701
702	/* has our stack been invalidated? */
703	if (next->stack && next->stack->gencnt != next->gencnt)
704	{
705	deallocate_stack (next);
706	allocate_stack (next, 1);
707	coro_create (&(next->stack->cctx),
708	continue_coro, (void *)next,
709	next->stack->sptr, labs (next->stack->ssize));
710	}
711
712	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713	/* don't add any code here */
714	}
715
716	}
717	else if (next->tmps_ix == -2)
718	croak ("tried to transfer to running coroutine");
719	else
720	{
721	SAVE (prev, -1); /* first get rid of the old state */
722
723	if (flags & TRANSFER_SAVE_CCTXT)
724	{
725	if (!prev->stack)
726	allocate_stack (prev, 0);
727
728	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
729	{
730	setup_coro (next);
731
732	prev->stack->refcnt++;
733	prev->stack->usecnt++;
734	next->stack = prev->stack;
735	next->gencnt = prev->gencnt;
736	}
737	else
738	{
739	allocate_stack (next, 1);
740	coro_create (&(next->stack->cctx),
741	setup_coro, (void *)next,
742	next->stack->sptr, labs (next->stack->ssize));
743	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744	/* don't add any code here */
745	}
746	}
747	else
748	setup_coro (next);
749	}
750
751	/*
752	* xnext is now either prev or next, depending on wether
753	* we switched the c stack or not. that's why I use a global
754	* variable, that should become thread-specific at one point.
755	*/
756	xnext->cursp = stacklevel;
757	}
758
759	if (coro_mortal)
760	{
761	SvREFCNT_dec (coro_mortal);
762	coro_mortal = 0;
763	}
764	}
765
766	#define SV_CORO(sv,func) \
767	do { \
768	if (SvROK (sv)) \
769	sv = SvRV (sv); \
770	\
771	if (SvTYPE(sv) == SVt_PVHV) \
772	{ \
773	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
774	\
775	if (!he) \
776	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
777	\
778	(sv) = SvRV (HeVAL(he)); \
779	} \
780	\
781	/* must also be changed inside Coro::Cont::yield */ \
782	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
783	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
784	\
785	} while(0)
786
787	#define SvSTATE(sv) (struct coro *)SvIV (sv)
788
789	static void
790	api_transfer(pTHX_ SV prev, SV next, int flags)
791	{
792	SV_CORO (prev, "Coro::transfer");
793	SV_CORO (next, "Coro::transfer");
794
795	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
796	}
797		244
798	/ Coro ******************************************************************/	245	/ Coro ******************************************************************/
799		246
800	#define PRIO_MAX 3	247	#define PRIO_MAX 3
801	#define PRIO_HIGH 1	248	#define PRIO_HIGH 1
…		…
803	#define PRIO_LOW -1	250	#define PRIO_LOW -1
804	#define PRIO_IDLE -3	251	#define PRIO_IDLE -3
805	#define PRIO_MIN -4	252	#define PRIO_MIN -4
806		253
807	/* for Coro.pm */	254	/* for Coro.pm */
808	static GV coro_current, coro_idle;	255	static SV *coro_current;
809	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	256	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
810	static int coro_nready;	257	static int coro_nready;
		258	static struct coro *coro_first;
811		259
812	static void	260	/ lowlevel stuff ********************************************************/
813	coro_enq (SV *sv)
814	{
815	if (SvTYPE (sv) == SVt_PVHV)
816	{
817	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
818	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
819
820	prio = prio > PRIO_MAX ? PRIO_MAX
821	: prio < PRIO_MIN ? PRIO_MIN
822	: prio;
823
824	av_push (coro_ready [prio - PRIO_MIN], sv);
825	coro_nready++;
826
827	return;
828	}
829
830	croak ("Coro::ready tried to enqueue something that is not a coroutine");
831	}
832		261
833	static SV *	262	static SV *
		263	coro_get_sv (const char *name, int create)
		264	{
		265	#if PERL_VERSION_ATLEAST (5,9,0)
		266	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		267	get_sv (name, create);
		268	#endif
		269	return get_sv (name, create);
		270	}
		271
		272	static SV *
		273	coro_get_av (const char *name, int create)
		274	{
		275	#if PERL_VERSION_ATLEAST (5,9,0)
		276	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		277	get_av (name, create);
		278	#endif
		279	return get_av (name, create);
		280	}
		281
		282	static AV *
		283	coro_clone_padlist (pTHX_ CV *cv)
		284	{
		285	AV *padlist = CvPADLIST (cv);
		286	AV newpadlist, newpad;
		287
		288	newpadlist = newAV ();
		289	AvREAL_off (newpadlist);
		290	#if PERL_VERSION_ATLEAST (5,9,0)
		291	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		292	#else
		293	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		294	#endif
		295	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		296	--AvFILLp (padlist);
		297
		298	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		299	av_store (newpadlist, 1, (SV *)newpad);
		300
		301	return newpadlist;
		302	}
		303
		304	static void
		305	free_padlist (pTHX_ AV *padlist)
		306	{
		307	/* may be during global destruction */
		308	if (SvREFCNT (padlist))
		309	{
		310	I32 i = AvFILLp (padlist);
		311	while (i >= 0)
		312	{
		313	SV **svp = av_fetch (padlist, i--, FALSE);
		314	if (svp)
		315	{
		316	SV *sv;
		317	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		318	SvREFCNT_dec (sv);
		319
		320	SvREFCNT_dec (*svp);
		321	}
		322	}
		323
		324	SvREFCNT_dec ((SV*)padlist);
		325	}
		326	}
		327
		328	static int
		329	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		330	{
		331	AV *padlist;
		332	AV av = (AV )mg->mg_obj;
		333
		334	/* casting is fun. */
		335	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		336	free_padlist (aTHX_ padlist);
		337
		338	SvREFCNT_dec (av);
		339
		340	return 0;
		341	}
		342
		343	#define PERL_MAGIC_coro PERL_MAGIC_ext
		344
		345	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		346
		347	#define CORO_MAGIC(cv) \
		348	SvMAGIC (cv) \
		349	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		350	? SvMAGIC (cv) \
		351	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		352	: 0
		353
		354	static struct coro *
		355	SvSTATE_ (pTHX_ SV *coro)
		356	{
		357	HV *stash;
		358	MAGIC *mg;
		359
		360	if (SvROK (coro))
		361	coro = SvRV (coro);
		362
		363	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		364	croak ("Coro::State object required");
		365
		366	stash = SvSTASH (coro);
		367	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		368	{
		369	/* very slow, but rare, check */
		370	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		371	croak ("Coro::State object required");
		372	}
		373
		374	mg = CORO_MAGIC (coro);
		375	return (struct coro *)mg->mg_ptr;
		376	}
		377
		378	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		379
		380	/* the next two functions merely cache the padlists */
		381	static void
		382	get_padlist (pTHX_ CV *cv)
		383	{
		384	MAGIC *mg = CORO_MAGIC (cv);
		385	AV *av;
		386
		387	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
		388	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		389	else
		390	{
		391	#if CORO_PREFER_PERL_FUNCTIONS
		392	/* this is probably cleaner, but also slower? */
		393	CV *cp = Perl_cv_clone (cv);
		394	CvPADLIST (cv) = CvPADLIST (cp);
		395	CvPADLIST (cp) = 0;
		396	SvREFCNT_dec (cp);
		397	#else
		398	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		399	#endif
		400	}
		401	}
		402
		403	static void
		404	put_padlist (pTHX_ CV *cv)
		405	{
		406	MAGIC *mg = CORO_MAGIC (cv);
		407	AV *av;
		408
		409	if (expect_false (!mg))
		410	{
		411	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		412	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		413	mg->mg_virtual = &vtbl_coro;
		414	mg->mg_obj = (SV *)newAV ();
		415	}
		416
		417	av = (AV *)mg->mg_obj;
		418
		419	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		420	av_extend (av, AvMAX (av) + 1);
		421
		422	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		423	}
		424
		425	/ load & save, init *****************************************************/
		426
		427	static void
		428	load_perl (pTHX_ Coro__State c)
		429	{
		430	perl_slots *slot = c->slot;
		431	c->slot = 0;
		432
		433	PL_mainstack = c->mainstack;
		434
		435	GvSV (PL_defgv) = slot->defsv;
		436	GvAV (PL_defgv) = slot->defav;
		437	GvSV (PL_errgv) = slot->errsv;
		438	GvSV (irsgv) = slot->irsgv;
		439
		440	#define VAR(name,type) PL_ ## name = slot->name;
		441	# include "state.h"
		442	#undef VAR
		443
		444	{
		445	dSP;
		446
		447	CV *cv;
		448
		449	/* now do the ugly restore mess */
		450	while (expect_true (cv = (CV *)POPs))
		451	{
		452	put_padlist (aTHX_ cv); /* mark this padlist as available */
		453	CvDEPTH (cv) = PTR2IV (POPs);
		454	CvPADLIST (cv) = (AV *)POPs;
		455	}
		456
		457	PUTBACK;
		458	}
		459	}
		460
		461	static void
		462	save_perl (pTHX_ Coro__State c)
		463	{
		464	{
		465	dSP;
		466	I32 cxix = cxstack_ix;
		467	PERL_CONTEXT *ccstk = cxstack;
		468	PERL_SI *top_si = PL_curstackinfo;
		469
		470	/*
		471	* the worst thing you can imagine happens first - we have to save
		472	* (and reinitialize) all cv's in the whole callchain :(
		473	*/
		474
		475	XPUSHs (Nullsv);
		476	/* this loop was inspired by pp_caller */
		477	for (;;)
		478	{
		479	while (expect_true (cxix >= 0))
		480	{
		481	PERL_CONTEXT *cx = &ccstk[cxix--];
		482
		483	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
		484	{
		485	CV *cv = cx->blk_sub.cv;
		486
		487	if (expect_true (CvDEPTH (cv)))
		488	{
		489	EXTEND (SP, 3);
		490	PUSHs ((SV *)CvPADLIST (cv));
		491	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
		492	PUSHs ((SV *)cv);
		493
		494	CvDEPTH (cv) = 0;
		495	get_padlist (aTHX_ cv);
		496	}
		497	}
		498	}
		499
		500	if (expect_true (top_si->si_type == PERLSI_MAIN))
		501	break;
		502
		503	top_si = top_si->si_prev;
		504	ccstk = top_si->si_cxstack;
		505	cxix = top_si->si_cxix;
		506	}
		507
		508	PUTBACK;
		509	}
		510
		511	/* allocate some space on the context stack for our purposes */
		512	{
		513	/* we manually unroll here, as usually 2 slots is enough */
		514	int i;
		515	if (SLOT_COUNT >= 1) CXINC;
		516	if (SLOT_COUNT >= 2) CXINC;
		517	if (SLOT_COUNT >= 3) CXINC;
		518	for (i = 3; i < SLOT_COUNT; ++i)
		519	CXINC;
		520
		521	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		522	}
		523
		524	c->mainstack = PL_mainstack;
		525
		526	{
		527	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		528
		529	slot->defav = GvAV (PL_defgv);
		530	slot->defsv = DEFSV;
		531	slot->errsv = ERRSV;
		532	slot->irsgv = GvSV (irsgv);
		533
		534	#define VAR(name,type) slot->name = PL_ ## name;
		535	# include "state.h"
		536	#undef VAR
		537	}
		538	}
		539
		540	/*
		541	* allocate various perl stacks. This is an exact copy
		542	* of perl.c:init_stacks, except that it uses less memory
		543	* on the (sometimes correct) assumption that coroutines do
		544	* not usually need a lot of stackspace.
		545	*/
		546	#if CORO_PREFER_PERL_FUNCTIONS
		547	# define coro_init_stacks init_stacks
		548	#else
		549	static void
		550	coro_init_stacks (pTHX)
		551	{
		552	PL_curstackinfo = new_stackinfo(32, 8);
		553	PL_curstackinfo->si_type = PERLSI_MAIN;
		554	PL_curstack = PL_curstackinfo->si_stack;
		555	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		556
		557	PL_stack_base = AvARRAY(PL_curstack);
		558	PL_stack_sp = PL_stack_base;
		559	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		560
		561	New(50,PL_tmps_stack,32,SV*);
		562	PL_tmps_floor = -1;
		563	PL_tmps_ix = -1;
		564	PL_tmps_max = 32;
		565
		566	New(54,PL_markstack,16,I32);
		567	PL_markstack_ptr = PL_markstack;
		568	PL_markstack_max = PL_markstack + 16;
		569
		570	#ifdef SET_MARK_OFFSET
		571	SET_MARK_OFFSET;
		572	#endif
		573
		574	New(54,PL_scopestack,8,I32);
		575	PL_scopestack_ix = 0;
		576	PL_scopestack_max = 8;
		577
		578	New(54,PL_savestack,24,ANY);
		579	PL_savestack_ix = 0;
		580	PL_savestack_max = 24;
		581
		582	#if !PERL_VERSION_ATLEAST (5,9,0)
		583	New(54,PL_retstack,4,OP*);
		584	PL_retstack_ix = 0;
		585	PL_retstack_max = 4;
		586	#endif
		587	}
		588	#endif
		589
		590	/*
		591	* destroy the stacks, the callchain etc...
		592	*/
		593	static void
		594	coro_destroy_stacks (pTHX)
		595	{
		596	while (PL_curstackinfo->si_next)
		597	PL_curstackinfo = PL_curstackinfo->si_next;
		598
		599	while (PL_curstackinfo)
		600	{
		601	PERL_SI *p = PL_curstackinfo->si_prev;
		602
		603	if (!IN_DESTRUCT)
		604	SvREFCNT_dec (PL_curstackinfo->si_stack);
		605
		606	Safefree (PL_curstackinfo->si_cxstack);
		607	Safefree (PL_curstackinfo);
		608	PL_curstackinfo = p;
		609	}
		610
		611	Safefree (PL_tmps_stack);
		612	Safefree (PL_markstack);
		613	Safefree (PL_scopestack);
		614	Safefree (PL_savestack);
		615	#if !PERL_VERSION_ATLEAST (5,9,0)
		616	Safefree (PL_retstack);
		617	#endif
		618	}
		619
		620	static size_t
		621	coro_rss (pTHX_ struct coro *coro)
		622	{
		623	size_t rss = sizeof (*coro);
		624
		625	if (coro->mainstack)
		626	{
		627	perl_slots tmp_slot;
		628	perl_slots *slot;
		629
		630	if (coro->flags & CF_RUNNING)
		631	{
		632	slot = &tmp_slot;
		633
		634	#define VAR(name,type) slot->name = PL_ ## name;
		635	# include "state.h"
		636	#undef VAR
		637	}
		638	else
		639	slot = coro->slot;
		640
		641	rss += sizeof (slot->curstackinfo);
		642	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		643	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		644	rss += slot->tmps_max * sizeof (SV *);
		645	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		646	rss += slot->scopestack_max * sizeof (I32);
		647	rss += slot->savestack_max * sizeof (ANY);
		648
		649	#if !PERL_VERSION_ATLEAST (5,9,0)
		650	rss += slot->retstack_max * sizeof (OP *);
		651	#endif
		652	}
		653
		654	return rss;
		655	}
		656
		657	/ coroutine stack handling **********************************************/
		658
		659	static void
		660	coro_setup (pTHX_ struct coro *coro)
		661	{
		662	/*
		663	* emulate part of the perl startup here.
		664	*/
		665	coro_init_stacks (aTHX);
		666
		667	PL_runops = RUNOPS_DEFAULT;
		668	PL_curcop = &PL_compiling;
		669	PL_in_eval = EVAL_NULL;
		670	PL_comppad = 0;
		671	PL_curpm = 0;
		672	PL_curpad = 0;
		673	PL_localizing = 0;
		674	PL_dirty = 0;
		675	PL_restartop = 0;
		676	PL_diehook = SvREFCNT_inc (sv_diehook);
		677	PL_warnhook = SvREFCNT_inc (sv_warnhook);
		678
		679	GvSV (PL_defgv) = newSV (0);
		680	GvAV (PL_defgv) = coro->args; coro->args = 0;
		681	GvSV (PL_errgv) = newSV (0);
		682	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		683	PL_rs = newSVsv (GvSV (irsgv));
		684	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		685
		686	{
		687	dSP;
		688	LOGOP myop;
		689
		690	Zero (&myop, 1, LOGOP);
		691	myop.op_next = Nullop;
		692	myop.op_flags = OPf_WANT_VOID;
		693
		694	PUSHMARK (SP);
		695	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		696	PUTBACK;
		697	PL_op = (OP *)&myop;
		698	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		699	SPAGAIN;
		700	}
		701
		702	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		703	}
		704
		705	static void
		706	coro_destroy (pTHX_ struct coro *coro)
		707	{
		708	if (!IN_DESTRUCT)
		709	{
		710	/* restore all saved variables and stuff */
		711	LEAVE_SCOPE (0);
		712	assert (PL_tmps_floor == -1);
		713
		714	/* free all temporaries */
		715	FREETMPS;
		716	assert (PL_tmps_ix == -1);
		717
		718	/* unwind all extra stacks */
		719	POPSTACK_TO (PL_mainstack);
		720
		721	/* unwind main stack */
		722	dounwind (-1);
		723	}
		724
		725	SvREFCNT_dec (GvSV (PL_defgv));
		726	SvREFCNT_dec (GvAV (PL_defgv));
		727	SvREFCNT_dec (GvSV (PL_errgv));
		728	SvREFCNT_dec (PL_defoutgv);
		729	SvREFCNT_dec (PL_rs);
		730	SvREFCNT_dec (GvSV (irsgv));
		731
		732	SvREFCNT_dec (PL_diehook);
		733	SvREFCNT_dec (PL_warnhook);
		734
		735	SvREFCNT_dec (coro->saved_deffh);
		736	SvREFCNT_dec (coro->throw);
		737
		738	coro_destroy_stacks (aTHX);
		739	}
		740
		741	static void
		742	free_coro_mortal (pTHX)
		743	{
		744	if (expect_true (coro_mortal))
		745	{
		746	SvREFCNT_dec (coro_mortal);
		747	coro_mortal = 0;
		748	}
		749	}
		750
		751	static int
		752	runops_trace (pTHX)
		753	{
		754	COP *oldcop = 0;
		755	int oldcxix = -2;
		756	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		757	coro_cctx *cctx = coro->cctx;
		758
		759	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		760	{
		761	PERL_ASYNC_CHECK ();
		762
		763	if (cctx->flags & CC_TRACE_ALL)
		764	{
		765	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		766	{
		767	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		768	SV bot, top;
		769	AV av = newAV (); / return values */
		770	SV **cb;
		771	dSP;
		772
		773	GV *gv = CvGV (cx->blk_sub.cv);
		774	SV *fullname = sv_2mortal (newSV (0));
		775	if (isGV (gv))
		776	gv_efullname3 (fullname, gv, 0);
		777
		778	bot = PL_stack_base + cx->blk_oldsp + 1;
		779	top = cx->blk_gimme == G_ARRAY ? SP + 1
		780	: cx->blk_gimme == G_SCALAR ? bot + 1
		781	: bot;
		782
		783	av_extend (av, top - bot);
		784	while (bot < top)
		785	av_push (av, SvREFCNT_inc (*bot++));
		786
		787	PL_runops = RUNOPS_DEFAULT;
		788	ENTER;
		789	SAVETMPS;
		790	EXTEND (SP, 3);
		791	PUSHMARK (SP);
		792	PUSHs (&PL_sv_no);
		793	PUSHs (fullname);
		794	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		795	PUTBACK;
		796	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		797	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		798	SPAGAIN;
		799	FREETMPS;
		800	LEAVE;
		801	PL_runops = runops_trace;
		802	}
		803
		804	if (oldcop != PL_curcop)
		805	{
		806	oldcop = PL_curcop;
		807
		808	if (PL_curcop != &PL_compiling)
		809	{
		810	SV **cb;
		811
		812	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		813	{
		814	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		815
		816	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		817	{
		818	runops_proc_t old_runops = PL_runops;
		819	dSP;
		820	GV *gv = CvGV (cx->blk_sub.cv);
		821	SV *fullname = sv_2mortal (newSV (0));
		822
		823	if (isGV (gv))
		824	gv_efullname3 (fullname, gv, 0);
		825
		826	PL_runops = RUNOPS_DEFAULT;
		827	ENTER;
		828	SAVETMPS;
		829	EXTEND (SP, 3);
		830	PUSHMARK (SP);
		831	PUSHs (&PL_sv_yes);
		832	PUSHs (fullname);
		833	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		834	PUTBACK;
		835	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		836	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		837	SPAGAIN;
		838	FREETMPS;
		839	LEAVE;
		840	PL_runops = runops_trace;
		841	}
		842
		843	oldcxix = cxstack_ix;
		844	}
		845
		846	if (cctx->flags & CC_TRACE_LINE)
		847	{
		848	dSP;
		849
		850	PL_runops = RUNOPS_DEFAULT;
		851	ENTER;
		852	SAVETMPS;
		853	EXTEND (SP, 3);
		854	PL_runops = RUNOPS_DEFAULT;
		855	PUSHMARK (SP);
		856	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		857	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		858	PUTBACK;
		859	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		860	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		861	SPAGAIN;
		862	FREETMPS;
		863	LEAVE;
		864	PL_runops = runops_trace;
		865	}
		866	}
		867	}
		868	}
		869	}
		870
		871	TAINT_NOT;
		872	return 0;
		873	}
		874
		875	/* inject a fake call to Coro::State::_cctx_init into the execution */
		876	/* _cctx_init should be careful, as it could be called at almost any time */
		877	/* during execution of a perl program */
		878	static void NOINLINE
		879	prepare_cctx (pTHX_ coro_cctx *cctx)
		880	{
		881	dSP;
		882	LOGOP myop;
		883
		884	PL_top_env = &PL_start_env;
		885
		886	if (cctx->flags & CC_TRACE)
		887	PL_runops = runops_trace;
		888
		889	Zero (&myop, 1, LOGOP);
		890	myop.op_next = PL_op;
		891	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		892
		893	PUSHMARK (SP);
		894	EXTEND (SP, 2);
		895	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		896	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		897	PUTBACK;
		898	PL_op = (OP *)&myop;
		899	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		900	SPAGAIN;
		901	}
		902
		903	/*
		904	* this is a _very_ stripped down perl interpreter ;)
		905	*/
		906	static void
		907	coro_run (void *arg)
		908	{
		909	dTHX;
		910
		911	/* coro_run is the alternative tail of transfer(), so unlock here. */
		912	UNLOCK;
		913
		914	/* we now skip the entersub that lead to transfer() */
		915	PL_op = PL_op->op_next;
		916
		917	/* inject a fake subroutine call to cctx_init */
		918	prepare_cctx (aTHX_ (coro_cctx *)arg);
		919
		920	/* somebody or something will hit me for both perl_run and PL_restartop */
		921	PL_restartop = PL_op;
		922	perl_run (PL_curinterp);
		923
		924	/*
		925	* If perl-run returns we assume exit() was being called or the coro
		926	* fell off the end, which seems to be the only valid (non-bug)
		927	* reason for perl_run to return. We try to exit by jumping to the
		928	* bootstrap-time "top" top_env, as we cannot restore the "main"
		929	* coroutine as Coro has no such concept
		930	*/
		931	PL_top_env = main_top_env;
		932	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		933	}
		934
		935	static coro_cctx *
		936	cctx_new ()
		937	{
		938	coro_cctx *cctx;
		939	void *stack_start;
		940	size_t stack_size;
		941
		942	++cctx_count;
		943
		944	Newz (0, cctx, 1, coro_cctx);
		945
		946	#if HAVE_MMAP
		947
		948	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		949	/* mmap supposedly does allocate-on-write for us */
		950	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		951
		952	if (cctx->sptr != (void *)-1)
		953	{
		954	# if CORO_STACKGUARD
		955	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		956	# endif
		957	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		958	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		959	cctx->flags \|= CC_MAPPED;
		960	}
		961	else
		962	#endif
		963	{
		964	cctx->ssize = coro_stacksize * (long)sizeof (long);
		965	New (0, cctx->sptr, coro_stacksize, long);
		966
		967	if (!cctx->sptr)
		968	{
		969	perror ("FATAL: unable to allocate stack for coroutine");
		970	_exit (EXIT_FAILURE);
		971	}
		972
		973	stack_start = cctx->sptr;
		974	stack_size = cctx->ssize;
		975	}
		976
		977	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		978	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		979
		980	return cctx;
		981	}
		982
		983	static void
		984	cctx_destroy (coro_cctx *cctx)
		985	{
		986	if (!cctx)
		987	return;
		988
		989	--cctx_count;
		990
		991	#if CORO_USE_VALGRIND
		992	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		993	#endif
		994
		995	#if HAVE_MMAP
		996	if (cctx->flags & CC_MAPPED)
		997	munmap (cctx->sptr, cctx->ssize);
		998	else
		999	#endif
		1000	Safefree (cctx->sptr);
		1001
		1002	Safefree (cctx);
		1003	}
		1004
		1005	/* wether this cctx should be destructed */
		1006	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1007
		1008	static coro_cctx *
		1009	cctx_get (pTHX)
		1010	{
		1011	while (expect_true (cctx_first))
		1012	{
		1013	coro_cctx *cctx = cctx_first;
		1014	cctx_first = cctx->next;
		1015	--cctx_idle;
		1016
		1017	if (expect_true (!CCTX_EXPIRED (cctx)))
		1018	return cctx;
		1019
		1020	cctx_destroy (cctx);
		1021	}
		1022
		1023	return cctx_new ();
		1024	}
		1025
		1026	static void
		1027	cctx_put (coro_cctx *cctx)
		1028	{
		1029	/* free another cctx if overlimit */
		1030	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1031	{
		1032	coro_cctx *first = cctx_first;
		1033	cctx_first = first->next;
		1034	--cctx_idle;
		1035
		1036	cctx_destroy (first);
		1037	}
		1038
		1039	++cctx_idle;
		1040	cctx->next = cctx_first;
		1041	cctx_first = cctx;
		1042	}
		1043
		1044	/ coroutine switching ***************************************************/
		1045
		1046	static void
		1047	transfer_check (pTHX_ struct coro prev, struct coro next)
		1048	{
		1049	if (expect_true (prev != next))
		1050	{
		1051	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1052	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1053
		1054	if (expect_false (next->flags & CF_RUNNING))
		1055	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1056
		1057	if (expect_false (next->flags & CF_DESTROYED))
		1058	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1059
		1060	if (
		1061	#if PERL_VERSION_ATLEAST (5,9,0)
		1062	expect_false (PL_parser)
		1063	#else
		1064	expect_false (PL_lex_state != LEX_NOTPARSING)
		1065	#endif
		1066	)
		1067	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1068	}
		1069	}
		1070
		1071	/* always use the TRANSFER macro */
		1072	static void NOINLINE
		1073	transfer (pTHX_ struct coro prev, struct coro next)
		1074	{
		1075	dSTACKLEVEL;
		1076
		1077	/* sometimes transfer is only called to set idle_sp */
		1078	if (expect_false (!next))
		1079	{
		1080	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1081	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1082	}
		1083	else if (expect_true (prev != next))
		1084	{
		1085	coro_cctx *prev__cctx;
		1086
		1087	if (expect_false (prev->flags & CF_NEW))
		1088	{
		1089	/* create a new empty context */
		1090	Newz (0, prev->cctx, 1, coro_cctx);
		1091	prev->flags &= ~CF_NEW;
		1092	prev->flags \|= CF_RUNNING;
		1093	}
		1094
		1095	prev->flags &= ~CF_RUNNING;
		1096	next->flags \|= CF_RUNNING;
		1097
		1098	LOCK;
		1099
		1100	if (expect_false (next->flags & CF_NEW))
		1101	{
		1102	/* need to start coroutine */
		1103	next->flags &= ~CF_NEW;
		1104	/* first get rid of the old state */
		1105	save_perl (aTHX_ prev);
		1106	/* setup coroutine call */
		1107	coro_setup (aTHX_ next);
		1108	}
		1109	else
		1110	{
		1111	/* coroutine already started */
		1112	save_perl (aTHX_ prev);
		1113	load_perl (aTHX_ next);
		1114	}
		1115
		1116	prev__cctx = prev->cctx;
		1117
		1118	/* possibly "free" the cctx */
		1119	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1120	{
		1121	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1122	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1123
		1124	prev->cctx = 0;
		1125
		1126	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1127	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1128	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1129	next->cctx = cctx_get (aTHX);
		1130
		1131	cctx_put (prev__cctx);
		1132	}
		1133
		1134	++next->usecount;
		1135
		1136	if (expect_true (!next->cctx))
		1137	next->cctx = cctx_get (aTHX);
		1138
		1139	if (expect_false (prev__cctx != next->cctx))
		1140	{
		1141	prev__cctx->top_env = PL_top_env;
		1142	PL_top_env = next->cctx->top_env;
		1143	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1144	}
		1145
		1146	free_coro_mortal (aTHX);
		1147	UNLOCK;
		1148
		1149	if (expect_false (prev->throw \|\| next->throw))
		1150	{
		1151	struct coro *coro = SvSTATE (coro_current);
		1152
		1153	if (coro->throw)
		1154	{
		1155	SV *exception = coro->throw;
		1156	coro->throw = 0;
		1157	sv_setsv (ERRSV, exception);
		1158	croak (0);
		1159	}
		1160	}
		1161	}
		1162	}
		1163
		1164	struct transfer_args
		1165	{
		1166	struct coro prev, next;
		1167	};
		1168
		1169	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1170	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1171
		1172	/ high level stuff ******************************************************/
		1173
		1174	static int
		1175	coro_state_destroy (pTHX_ struct coro *coro)
		1176	{
		1177	if (coro->flags & CF_DESTROYED)
		1178	return 0;
		1179
		1180	coro->flags \|= CF_DESTROYED;
		1181
		1182	if (coro->flags & CF_READY)
		1183	{
		1184	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1185	/* alternative: look through all ready queues and remove the coro */
		1186	LOCK;
		1187	--coro_nready;
		1188	UNLOCK;
		1189	}
		1190	else
		1191	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1192
		1193	if (coro->mainstack && coro->mainstack != main_mainstack)
		1194	{
		1195	struct coro temp;
		1196
		1197	if (coro->flags & CF_RUNNING)
		1198	croak ("FATAL: tried to destroy currently running coroutine");
		1199
		1200	save_perl (aTHX_ &temp);
		1201	load_perl (aTHX_ coro);
		1202
		1203	coro_destroy (aTHX_ coro);
		1204
		1205	load_perl (aTHX_ &temp);
		1206
		1207	coro->slot = 0;
		1208	}
		1209
		1210	cctx_destroy (coro->cctx);
		1211	SvREFCNT_dec (coro->args);
		1212
		1213	if (coro->next) coro->next->prev = coro->prev;
		1214	if (coro->prev) coro->prev->next = coro->next;
		1215	if (coro == coro_first) coro_first = coro->next;
		1216
		1217	return 1;
		1218	}
		1219
		1220	static int
		1221	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1222	{
		1223	struct coro coro = (struct coro )mg->mg_ptr;
		1224	mg->mg_ptr = 0;
		1225
		1226	coro->hv = 0;
		1227
		1228	if (--coro->refcnt < 0)
		1229	{
		1230	coro_state_destroy (aTHX_ coro);
		1231	Safefree (coro);
		1232	}
		1233
		1234	return 0;
		1235	}
		1236
		1237	static int
		1238	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1239	{
		1240	struct coro coro = (struct coro )mg->mg_ptr;
		1241
		1242	++coro->refcnt;
		1243
		1244	return 0;
		1245	}
		1246
		1247	static MGVTBL coro_state_vtbl = {
		1248	0, 0, 0, 0,
		1249	coro_state_free,
		1250	0,
		1251	#ifdef MGf_DUP
		1252	coro_state_dup,
		1253	#else
		1254	# define MGf_DUP 0
		1255	#endif
		1256	};
		1257
		1258	static void
		1259	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1260	{
		1261	ta->prev = SvSTATE (prev_sv);
		1262	ta->next = SvSTATE (next_sv);
		1263	TRANSFER_CHECK (*ta);
		1264	}
		1265
		1266	static void
		1267	api_transfer (SV prev_sv, SV next_sv)
		1268	{
		1269	dTHX;
		1270	struct transfer_args ta;
		1271
		1272	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1273	TRANSFER (ta);
		1274	}
		1275
		1276	/ Coro ******************************************************************/
		1277
		1278	static void
		1279	coro_enq (pTHX_ SV *coro_sv)
		1280	{
		1281	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1282	}
		1283
		1284	static SV *
834	coro_deq (int min_prio)	1285	coro_deq (pTHX_ int min_prio)
835	{	1286	{
836	int prio = PRIO_MAX - PRIO_MIN;	1287	int prio = PRIO_MAX - PRIO_MIN;
837		1288
838	min_prio -= PRIO_MIN;	1289	min_prio -= PRIO_MIN;
839	if (min_prio < 0)	1290	if (min_prio < 0)
840	min_prio = 0;	1291	min_prio = 0;
841		1292
842	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1293	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
843	if (av_len (coro_ready[prio]) >= 0)	1294	if (AvFILLp (coro_ready [prio]) >= 0)
844	{
845	coro_nready--;
846	return av_shift (coro_ready[prio]);	1295	return av_shift (coro_ready [prio]);
847	}
848		1296
849	return 0;	1297	return 0;
850	}	1298	}
851		1299
852	static void	1300	static int
853	api_ready (SV *coro)	1301	api_ready (SV *coro_sv)
854	{	1302	{
		1303	dTHX;
		1304	struct coro *coro;
		1305
855	if (SvROK (coro))	1306	if (SvROK (coro_sv))
856	coro = SvRV (coro);	1307	coro_sv = SvRV (coro_sv);
857		1308
		1309	coro = SvSTATE (coro_sv);
		1310
		1311	if (coro->flags & CF_READY)
		1312	return 0;
		1313
		1314	coro->flags \|= CF_READY;
		1315
		1316	LOCK;
858	coro_enq (SvREFCNT_inc (coro));	1317	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1318	++coro_nready;
		1319	UNLOCK;
		1320
		1321	return 1;
		1322	}
		1323
		1324	static int
		1325	api_is_ready (SV *coro_sv)
		1326	{
		1327	dTHX;
		1328	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1329	}
		1330
		1331	static void
		1332	prepare_schedule (pTHX_ struct transfer_args *ta)
		1333	{
		1334	SV prev_sv, next_sv;
		1335
		1336	for (;;)
		1337	{
		1338	LOCK;
		1339	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1340
		1341	/* nothing to schedule: call the idle handler */
		1342	if (expect_false (!next_sv))
		1343	{
		1344	dSP;
		1345	UNLOCK;
		1346
		1347	ENTER;
		1348	SAVETMPS;
		1349
		1350	PUSHMARK (SP);
		1351	PUTBACK;
		1352	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1353
		1354	FREETMPS;
		1355	LEAVE;
		1356	continue;
		1357	}
		1358
		1359	ta->next = SvSTATE (next_sv);
		1360
		1361	/* cannot transfer to destroyed coros, skip and look for next */
		1362	if (expect_false (ta->next->flags & CF_DESTROYED))
		1363	{
		1364	UNLOCK;
		1365	SvREFCNT_dec (next_sv);
		1366	/* coro_nready is already taken care of by destroy */
		1367	continue;
		1368	}
		1369
		1370	--coro_nready;
		1371	UNLOCK;
		1372	break;
		1373	}
		1374
		1375	/* free this only after the transfer */
		1376	prev_sv = SvRV (coro_current);
		1377	ta->prev = SvSTATE (prev_sv);
		1378	TRANSFER_CHECK (*ta);
		1379	assert (ta->next->flags & CF_READY);
		1380	ta->next->flags &= ~CF_READY;
		1381	SvRV_set (coro_current, next_sv);
		1382
		1383	LOCK;
		1384	free_coro_mortal (aTHX);
		1385	coro_mortal = prev_sv;
		1386	UNLOCK;
		1387	}
		1388
		1389	static void
		1390	prepare_cede (pTHX_ struct transfer_args *ta)
		1391	{
		1392	api_ready (coro_current);
		1393	prepare_schedule (aTHX_ ta);
		1394	}
		1395
		1396	static int
		1397	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1398	{
		1399	if (coro_nready)
		1400	{
		1401	SV *prev = SvRV (coro_current);
		1402	prepare_schedule (aTHX_ ta);
		1403	api_ready (prev);
		1404	return 1;
		1405	}
		1406	else
		1407	return 0;
859	}	1408	}
860		1409
861	static void	1410	static void
862	api_schedule (void)	1411	api_schedule (void)
863	{	1412	{
864	SV prev, next;	1413	dTHX;
		1414	struct transfer_args ta;
865		1415
866	prev = SvRV (GvSV (coro_current));	1416	prepare_schedule (aTHX_ &ta);
867	next = coro_deq (PRIO_MIN);	1417	TRANSFER (ta);
868
869	if (!next)
870	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
871
872	/* free this only after the transfer */
873	coro_mortal = prev;
874	SV_CORO (prev, "Coro::schedule");
875
876	SvRV (GvSV (coro_current)) = next;
877
878	SV_CORO (next, "Coro::schedule");
879
880	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
881	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
882	}	1418	}
883		1419
884	static void	1420	static int
885	api_cede (void)	1421	api_cede (void)
886	{	1422	{
887	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1423	dTHX;
		1424	struct transfer_args ta;
888		1425
889	api_schedule ();	1426	prepare_cede (aTHX_ &ta);
890	}
891		1427
		1428	if (expect_true (ta.prev != ta.next))
		1429	{
		1430	TRANSFER (ta);
		1431	return 1;
		1432	}
		1433	else
		1434	return 0;
		1435	}
		1436
		1437	static int
		1438	api_cede_notself (void)
		1439	{
		1440	dTHX;
		1441	struct transfer_args ta;
		1442
		1443	if (prepare_cede_notself (aTHX_ &ta))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
		1450	}
		1451
		1452	static void
		1453	api_trace (SV *coro_sv, int flags)
		1454	{
		1455	dTHX;
		1456	struct coro *coro = SvSTATE (coro_sv);
		1457
		1458	if (flags & CC_TRACE)
		1459	{
		1460	if (!coro->cctx)
		1461	coro->cctx = cctx_new ();
		1462	else if (!(coro->cctx->flags & CC_TRACE))
		1463	croak ("cannot enable tracing on coroutine with custom stack");
		1464
		1465	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1466	}
		1467	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1468	{
		1469	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1470
		1471	if (coro->flags & CF_RUNNING)
		1472	PL_runops = RUNOPS_DEFAULT;
		1473	else
		1474	coro->slot->runops = RUNOPS_DEFAULT;
		1475	}
		1476	}
		1477
892	MODULE = Coro::State PACKAGE = Coro::State	1478	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
893		1479
894	PROTOTYPES: ENABLE	1480	PROTOTYPES: DISABLE
895		1481
896	BOOT:	1482	BOOT:
897	{ /* {} necessary for stoopid perl-5.6.x */	1483	{
898	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1484	#ifdef USE_ITHREADS
899	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1485	MUTEX_INIT (&coro_mutex);
		1486	#endif
		1487	BOOT_PAGESIZE;
		1488
		1489	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1490	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1491
		1492	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1493	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1494
		1495	if (!PL_diehook) PL_diehook = SvREFCNT_inc (sv_diehook);
		1496	if (!PL_warnhook) PL_warnhook = SvREFCNT_inc (sv_warnhook);
		1497
900	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1498	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
901		1499
902	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1500	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
903	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1501	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
904	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1502	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
905	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1503	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
906
907	if (!padlist_cache)
908	padlist_cache = newHV ();
909		1504
910	main_mainstack = PL_mainstack;	1505	main_mainstack = PL_mainstack;
		1506	main_top_env = PL_top_env;
		1507
		1508	while (main_top_env->je_prev)
		1509	main_top_env = main_top_env->je_prev;
911		1510
912	coroapi.ver = CORO_API_VERSION;	1511	coroapi.ver = CORO_API_VERSION;
913	coroapi.transfer = api_transfer;	1512	coroapi.transfer = api_transfer;
914	}
915		1513
916	Coro::State	1514	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
917	_newprocess(args)	1515	}
918	SV * args	1516
919	PROTOTYPE: $	1517	SV *
		1518	new (char *klass, ...)
920	CODE:	1519	CODE:
921	Coro__State coro;	1520	{
		1521	struct coro *coro;
		1522	HV *hv;
		1523	int i;
922		1524
923	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
924	croak ("Coro::State::_newprocess expects an arrayref");
925
926	New (0, coro, 1, struct coro);	1525	Newz (0, coro, 1, struct coro);
		1526	coro->args = newAV ();
		1527	coro->flags = CF_NEW;
927		1528
928	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1529	if (coro_first) coro_first->prev = coro;
929	coro->mainstack = 0; /* actual work is done inside transfer */	1530	coro->next = coro_first;
930	coro->stack = 0;	1531	coro_first = coro;
931		1532
932	RETVAL = coro;	1533	coro->hv = hv = newHV ();
		1534	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1535	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1536
		1537	av_extend (coro->args, items - 1);
		1538	for (i = 1; i < items; i++)
		1539	av_push (coro->args, newSVsv (ST (i)));
		1540	}
933	OUTPUT:	1541	OUTPUT:
934	RETVAL	1542	RETVAL
935		1543
		1544	# these not obviously related functions are all rolled into the same xs
		1545	# function to increase chances that they all will call transfer with the same
		1546	# stack offset
936	void	1547	void
937	transfer(prev, next, flags)	1548	_set_stacklevel (...)
938	SV *prev	1549	ALIAS:
939	SV *next	1550	Coro::State::transfer = 1
940	int flags	1551	Coro::schedule = 2
941	PROTOTYPE: @	1552	Coro::cede = 3
		1553	Coro::cede_notself = 4
942	CODE:	1554	CODE:
943	PUTBACK;	1555	{
944	SV_CORO (next, "Coro::transfer");	1556	struct transfer_args ta;
945	SV_CORO (prev, "Coro::transfer");	1557
946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1558	switch (ix)
947	SPAGAIN;	1559	{
		1560	case 0:
		1561	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1562	ta.next = 0;
		1563	break;
		1564
		1565	case 1:
		1566	if (items != 2)
		1567	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1568
		1569	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1570	break;
		1571
		1572	case 2:
		1573	prepare_schedule (aTHX_ &ta);
		1574	break;
		1575
		1576	case 3:
		1577	prepare_cede (aTHX_ &ta);
		1578	break;
		1579
		1580	case 4:
		1581	if (!prepare_cede_notself (aTHX_ &ta))
		1582	XSRETURN_EMPTY;
		1583
		1584	break;
		1585	}
		1586
		1587	BARRIER;
		1588	TRANSFER (ta);
		1589
		1590	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1591	XSRETURN_YES;
		1592	}
		1593
		1594	bool
		1595	_destroy (SV *coro_sv)
		1596	CODE:
		1597	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1598	OUTPUT:
		1599	RETVAL
948		1600
949	void	1601	void
950	DESTROY(coro)
951	Coro::State coro
952	CODE:
953
954	if (coro->mainstack && coro->mainstack != main_mainstack)
955	{
956	struct coro temp;
957
958	PUTBACK;
959	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
960	LOAD(aTHX_ coro);
961	SPAGAIN;
962
963	destroy_stacks (aTHX);
964
965	LOAD((&temp)); /* this will get rid of defsv etc.. */
966	SPAGAIN;
967
968	coro->mainstack = 0;
969	}
970
971	deallocate_stack (coro);
972
973	Safefree (coro);
974
975	void
976	flush()
977	CODE:
978	#ifdef MAY_FLUSH
979	flush_padlist_cache ();
980	#endif
981
982	void
983	_exit(code)	1602	_exit (code)
984	int code	1603	int code
985	PROTOTYPE: $	1604	PROTOTYPE: $
986	CODE:	1605	CODE:
987	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
988	_exit (code);	1606	_exit (code);
989	#else
990	signal (SIGTERM, SIG_DFL);
991	raise (SIGTERM);
992	exit (code);
993	#endif
994		1607
995	MODULE = Coro::State PACKAGE = Coro::Cont	1608	int
		1609	cctx_stacksize (int new_stacksize = 0)
		1610	CODE:
		1611	RETVAL = coro_stacksize;
		1612	if (new_stacksize)
		1613	coro_stacksize = new_stacksize;
		1614	OUTPUT:
		1615	RETVAL
996		1616
997	# this is slightly dirty (should expose a c-level api)	1617	int
		1618	cctx_count ()
		1619	CODE:
		1620	RETVAL = cctx_count;
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	int
		1625	cctx_idle ()
		1626	CODE:
		1627	RETVAL = cctx_idle;
		1628	OUTPUT:
		1629	RETVAL
998		1630
999	void	1631	void
1000	yield(...)	1632	list ()
1001	PROTOTYPE: @	1633	PPCODE:
		1634	{
		1635	struct coro *coro;
		1636	for (coro = coro_first; coro; coro = coro->next)
		1637	if (coro->hv)
		1638	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1639	}
		1640
		1641	void
		1642	call (Coro::State coro, SV *coderef)
		1643	ALIAS:
		1644	eval = 1
		1645	CODE:
		1646	{
		1647	if (coro->mainstack)
		1648	{
		1649	struct coro temp;
		1650
		1651	if (!(coro->flags & CF_RUNNING))
		1652	{
		1653	save_perl (aTHX_ &temp);
		1654	load_perl (aTHX_ coro);
		1655	}
		1656
		1657	{
		1658	dSP;
		1659	ENTER;
		1660	SAVETMPS;
		1661	PUSHMARK (SP);
		1662	PUTBACK;
		1663
		1664	if (ix)
		1665	eval_sv (coderef, 0);
		1666	else
		1667	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1668
		1669	SPAGAIN;
		1670	FREETMPS;
		1671	LEAVE;
		1672	PUTBACK;
		1673	}
		1674
		1675	if (!(coro->flags & CF_RUNNING))
		1676	{
		1677	save_perl (aTHX_ coro);
		1678	load_perl (aTHX_ &temp);
		1679	}
		1680	}
		1681	}
		1682
		1683	SV *
		1684	is_ready (Coro::State coro)
		1685	PROTOTYPE: $
		1686	ALIAS:
		1687	is_ready = CF_READY
		1688	is_running = CF_RUNNING
		1689	is_new = CF_NEW
		1690	is_destroyed = CF_DESTROYED
		1691	CODE:
		1692	RETVAL = boolSV (coro->flags & ix);
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	void
		1697	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1698
		1699	SV *
		1700	has_stack (Coro::State coro)
		1701	PROTOTYPE: $
		1702	CODE:
		1703	RETVAL = boolSV (!!coro->cctx);
		1704	OUTPUT:
		1705	RETVAL
		1706
		1707	int
		1708	is_traced (Coro::State coro)
		1709	PROTOTYPE: $
		1710	CODE:
		1711	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1712	OUTPUT:
		1713	RETVAL
		1714
		1715	IV
		1716	rss (Coro::State coro)
		1717	PROTOTYPE: $
		1718	ALIAS:
		1719	usecount = 1
1002	CODE:	1720	CODE:
1003	static SV *returnstk;	1721	switch (ix)
1004	SV *sv;	1722	{
1005	AV *defav = GvAV (PL_defgv);	1723	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1006	struct coro prev, next;	1724	case 1: RETVAL = coro->usecount; break;
		1725	}
		1726	OUTPUT:
		1727	RETVAL
1007		1728
1008	if (!returnstk)
1009	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1010
1011	/* set up @_ -- ugly */
1012	av_clear (defav);
1013	av_fill (defav, items - 1);
1014	while (items--)
1015	av_store (defav, items, SvREFCNT_inc (ST(items)));
1016
1017	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1018	sv = av_pop ((AV *)SvRV (returnstk));
1019	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1020	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1021	SvREFCNT_dec (sv);
1022
1023	transfer(aTHX_ prev, next, 0);
1024		1729
1025	MODULE = Coro::State PACKAGE = Coro	1730	MODULE = Coro::State PACKAGE = Coro
1026		1731
1027	# this is slightly dirty (should expose a c-level api)
1028
1029	BOOT:	1732	BOOT:
1030	{	1733	{
1031	int i;	1734	int i;
		1735
		1736	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1737	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1738	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1739
		1740	coro_current = coro_get_sv ("Coro::current", FALSE);
		1741	SvREADONLY_on (coro_current);
		1742
1032	HV *stash = gv_stashpv ("Coro", TRUE);	1743	coro_stash = gv_stashpv ("Coro", TRUE);
1033		1744
1034	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1745	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1035	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1746	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1036	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1747	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1037	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1748	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1038	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1749	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1039	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1750	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1040
1041	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1042	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1043		1751
1044	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1752	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1045	coro_ready[i] = newAV ();	1753	coro_ready[i] = newAV ();
1046		1754
1047	{	1755	{
1048	SV *sv = perl_get_sv("Coro::API", 1);	1756	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1757	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1049		1758
1050	coroapi.schedule = api_schedule;	1759	coroapi.schedule = api_schedule;
1051	coroapi.cede = api_cede;	1760	coroapi.cede = api_cede;
		1761	coroapi.cede_notself = api_cede_notself;
1052	coroapi.ready = api_ready;	1762	coroapi.ready = api_ready;
		1763	coroapi.is_ready = api_is_ready;
1053	coroapi.nready = &coro_nready;	1764	coroapi.nready = &coro_nready;
1054	coroapi.current = coro_current;	1765	coroapi.current = coro_current;
1055		1766
1056	GCoroAPI = &coroapi;	1767	GCoroAPI = &coroapi;
1057	sv_setiv(sv, (IV)&coroapi);	1768	sv_setiv (sv, (IV)&coroapi);
1058	SvREADONLY_on(sv);	1769	SvREADONLY_on (sv);
1059	}	1770	}
1060	}	1771	}
1061		1772
1062	void	1773	void
1063	ready(self)	1774	_set_current (SV *current)
1064	SV * self
1065	PROTOTYPE: $	1775	PROTOTYPE: $
1066	CODE:	1776	CODE:
1067	api_ready (self);	1777	SvREFCNT_dec (SvRV (coro_current));
		1778	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1068		1779
1069	int	1780	int
		1781	prio (Coro::State coro, int newprio = 0)
		1782	ALIAS:
		1783	nice = 1
		1784	CODE:
		1785	{
		1786	RETVAL = coro->prio;
		1787
		1788	if (items > 1)
		1789	{
		1790	if (ix)
		1791	newprio = coro->prio - newprio;
		1792
		1793	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1794	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1795
		1796	coro->prio = newprio;
		1797	}
		1798	}
		1799	OUTPUT:
		1800	RETVAL
		1801
		1802	SV *
		1803	ready (SV *self)
		1804	PROTOTYPE: $
		1805	CODE:
		1806	RETVAL = boolSV (api_ready (self));
		1807	OUTPUT:
		1808	RETVAL
		1809
		1810	int
1070	nready(...)	1811	nready (...)
1071	PROTOTYPE:	1812	PROTOTYPE:
1072	CODE:	1813	CODE:
1073	RETVAL = coro_nready;	1814	RETVAL = coro_nready;
1074	OUTPUT:	1815	OUTPUT:
1075	RETVAL	1816	RETVAL
1076		1817
1077	void	1818	void
1078	schedule(...)	1819	throw (Coro::State self, SV *throw = &PL_sv_undef)
1079	PROTOTYPE:	1820	PROTOTYPE: $;$
		1821	CODE:
		1822	SvREFCNT_dec (self->throw);
		1823	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1824
		1825	# for async_pool speedup
		1826	void
		1827	_pool_1 (SV *cb)
1080	CODE:	1828	CODE:
1081	api_schedule ();	1829	{
		1830	struct coro *coro = SvSTATE (coro_current);
		1831	HV hv = (HV )SvRV (coro_current);
		1832	AV *defav = GvAV (PL_defgv);
		1833	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1834	AV *invoke_av;
		1835	int i, len;
		1836
		1837	if (!invoke)
		1838	croak ("\3async_pool terminate\2\n");
		1839
		1840	SvREFCNT_dec (coro->saved_deffh);
		1841	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1842
		1843	hv_store (hv, "desc", sizeof ("desc") - 1,
		1844	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1845
		1846	invoke_av = (AV *)SvRV (invoke);
		1847	len = av_len (invoke_av);
		1848
		1849	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1850
		1851	if (len > 0)
		1852	{
		1853	av_fill (defav, len - 1);
		1854	for (i = 0; i < len; ++i)
		1855	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1856	}
		1857
		1858	SvREFCNT_dec (invoke);
		1859	}
1082		1860
1083	void	1861	void
1084	cede(...)	1862	_pool_2 (SV *cb)
1085	PROTOTYPE:
1086	CODE:	1863	CODE:
1087	api_cede ();	1864	{
		1865	struct coro *coro = SvSTATE (coro_current);
1088		1866
		1867	sv_setsv (cb, &PL_sv_undef);
		1868
		1869	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1870	coro->saved_deffh = 0;
		1871
		1872	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1873	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1874	croak ("\3async_pool terminate\2\n");
		1875
		1876	av_clear (GvAV (PL_defgv));
		1877	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1878	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1879
		1880	coro->prio = 0;
		1881
		1882	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1883	api_trace (coro_current, 0);
		1884
		1885	av_push (av_async_pool, newSVsv (coro_current));
		1886	}
		1887
		1888
		1889	MODULE = Coro::State PACKAGE = Coro::AIO
		1890
		1891	SV *
		1892	_get_state ()
		1893	CODE:
		1894	{
		1895	struct io_state *data;
		1896
		1897	RETVAL = newSV (sizeof (struct io_state));
		1898	data = (struct io_state *)SvPVX (RETVAL);
		1899	SvCUR_set (RETVAL, sizeof (struct io_state));
		1900	SvPOK_only (RETVAL);
		1901
		1902	data->errorno = errno;
		1903	data->laststype = PL_laststype;
		1904	data->laststatval = PL_laststatval;
		1905	data->statcache = PL_statcache;
		1906	}
		1907	OUTPUT:
		1908	RETVAL
		1909
		1910	void
		1911	_set_state (char *data_)
		1912	PROTOTYPE: $
		1913	CODE:
		1914	{
		1915	struct io_state data = (void )data_;
		1916
		1917	errno = data->errorno;
		1918	PL_laststype = data->laststype;
		1919	PL_laststatval = data->laststatval;
		1920	PL_statcache = data->statcache;
		1921	}
		1922

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Comparing Coro/Coro/State.xs (file contents): Revision 1.42 by root, Mon Dec 31 20:41:45 2001 UTC vs. Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.42 by root, Mon Dec 31 20:41:45 2001 UTC vs.
Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC