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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.230 by root, Mon Apr 14 11:28:59 2008 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 "patchlevel.h"	10	#include "patchlevel.h"
6		11
7	#if PATCHLEVEL < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
		16
		17	#ifdef HAVE_MMAP
		18	# include <unistd.h>
		19	# include <sys/mman.h>
		20	# ifndef MAP_ANONYMOUS
		21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
		23	# else
		24	# undef HAVE_MMAP
		25	# endif
		26	# endif
		27	# include <limits.h>
		28	# ifndef PAGESIZE
		29	# define PAGESIZE pagesize
		30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		31	static long pagesize;
		32	# else
		33	# define BOOT_PAGESIZE (void)0
		34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
		39
		40	#if CORO_USE_VALGRIND
		41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	\|\| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
10	# endif	59	# endif
11	# ifndef call_sv	60	# ifndef call_sv
12	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
23	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
25	# endif	74	# endif
26	#endif	75	#endif
27		76
28	#include "libcoro/coro.c"	77	/* 5.8.8 */
29		78	#ifndef GV_NOTQUAL
30	#include <signal.h>	79	# define GV_NOTQUAL 0
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
42	#endif	83	#endif
43		84
44	#define MAY_FLUSH /* increases codesize and is rarely used */	85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
45		89
46	#define SUB_INIT "Coro::State::initialize"	90	/* 5.8.7 */
47	#define UCORO_STATE "_coro_state"	91	#ifndef SvRV_set
		92	# define SvRV_set(s,v) SvRV(s) = (v)
		93	#endif
48		94
49	/* The next macro should declare a variable stacklevel that contains and approximation	95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
50	* to the current C stack pointer. Its property is that it changes with each call	96	# undef CORO_STACKGUARD
51	* and should be unique. */	97	#endif
		98
		99	#ifndef CORO_STACKGUARD
		100	# define CORO_STACKGUARD 0
		101	#endif
		102
		103	/* prefer perl internal functions over our own? */
		104	#ifndef CORO_PREFER_PERL_FUNCTIONS
		105	# define CORO_PREFER_PERL_FUNCTIONS 0
		106	#endif
		107
		108	/* The next macros try to return the current stack pointer, in an as
		109	* portable way as possible. */
		110	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	111	#define STACKLEVEL ((void *)&stacklevel)
53		112
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		114
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	115	#if __GNUC__ >= 3
		116	# define attribute(x) __attribute__(x)
		117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
		119	#else
		120	# define attribute(x)
		121	# define BARRIER
		122	# define expect(expr,value) (expr)
		123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
		127
		128	#define NOINLINE attribute ((noinline))
57		129
58	#include "CoroAPI.h"	130	#include "CoroAPI.h"
59		131
		132	#ifdef USE_ITHREADS
		133	static perl_mutex coro_mutex;
		134	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		135	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		136	#else
		137	# define LOCK (void)0
		138	# define UNLOCK (void)0
		139	#endif
		140
		141	/* helper storage struct for Coro::AIO */
		142	struct io_state
		143	{
		144	int errorno;
		145	I32 laststype;
		146	int laststatval;
		147	Stat_t statcache;
		148	};
		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
60	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
		152	static AV main_mainstack; / used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
		154	static HV coro_state_stash, coro_stash;
		155	static volatile SV coro_mortal; / will be freed after next transfer */
61		156
62	/* this is actually not only the c stack but also c registers etc... */	157	static GV irsgv; / $/ */
		158	static GV stdoutgv; / STDOUT /
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV hv_sig; / %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
		167
		168	static struct coro_cctx *cctx_first;
		169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		178	};
		179
		180	/* this is a structure representing a c-level coroutine */
		181	typedef struct coro_cctx {
		182	struct coro_cctx *next;
		183
		184	/* the stack */
		185	void *sptr;
		186	size_t ssize;
		187
		188	/* cpu state */
		189	void idle_sp; / sp of top-level transfer/schedule/cede call */
		190	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		191	JMPENV *top_env;
		192	coro_context cctx;
		193
		194	#if CORO_USE_VALGRIND
		195	int valgrind_id;
		196	#endif
		197	unsigned char flags;
		198	} coro_cctx;
		199
		200	enum {
		201	CF_RUNNING = 0x0001, /* coroutine is running */
		202	CF_READY = 0x0002, /* coroutine is ready */
		203	CF_NEW = 0x0004, /* has never been switched to */
		204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		205	};
		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
63	typedef struct {	208	typedef struct {
64	int refcnt; /* pointer reference counter */	209	SV *defsv;
65	int usecnt; /* shared by how many coroutines */	210	AV *defav;
66	int gencnt; /* generation counter */	211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
67		217
68	coro_context cctx;	218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
69		219
70	void *sptr;	220	/* this is a structure representing a perl-level coroutine */
71	long ssize; /* positive == mmap, otherwise malloc */
72	} coro_stack;
73
74	struct coro {	221	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	222	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	223	coro_cctx *cctx;
77		224
78	/* the optional C context */	225	/* process data */
79	coro_stack *stack;
80	void *cursp;
81	int gencnt;
82
83	/* optionally saved, might be zero */
84	AV *defav;
85	SV *defsv;
86	SV *errsv;
87
88	/* saved global state not related to stacks */
89	U8 dowarn;
90	I32 in_eval;
91
92	/* the stacks and related info (callchain etc..) */
93	PERL_SI *curstackinfo;
94	AV *curstack;
95	AV *mainstack;	226	AV *mainstack;
96	SV **stack_sp;	227	perl_slots slot; / basically the saved sp */
97	OP *op;
98	SV **curpad;
99	AV *comppad;
100	SV **stack_base;
101	SV **stack_max;
102	SV **tmps_stack;
103	I32 tmps_floor;
104	I32 tmps_ix;
105	I32 tmps_max;
106	I32 *markstack;
107	I32 *markstack_ptr;
108	I32 *markstack_max;
109	I32 *scopestack;
110	I32 scopestack_ix;
111	I32 scopestack_max;
112	ANY *savestack;
113	I32 savestack_ix;
114	I32 savestack_max;
115	OP **retstack;
116	I32 retstack_ix;
117	I32 retstack_max;
118	COP *curcop;
119	JMPENV *top_env;
120		228
121	/* data associated with this coroutine (initial args) */	229	AV args; / data associated with this coroutine (initial args) */
122	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
		231	int flags; /* CF_ flags */
		232	HV hv; / the perl hash associated with this coro, if any */
		233
		234	/* statistics */
		235	int usecount; /* number of transfers to this coro */
		236
		237	/* coro process data */
		238	int prio;
		239	SV throw; / exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
		243
		244	/* linked list */
		245	struct coro next, prev;
123	};	246	};
124		247
125	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
127
128	static AV main_mainstack; / used to differentiate between $main and others */
129	static HV *coro_state_stash;
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV coro_mortal; / will be freed after next transfer */
134
135	/* mostly copied from op.c:cv_clone2 */
136	STATIC AV *
137	clone_padlist (AV *protopadlist)
138	{
139	AV *av;
140	I32 ix;
141	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
142	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV newpadlist, newpad_name, *newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157
158	newpadlist = newAV ();
159	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);
161	av_store (newpadlist, 1, (SV *) newpad);
162
163	av = newAV (); /* will be @_ */
164	av_extend (av, 0);
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167
168	for (ix = fpad; ix > 0; ix--)
169	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
171	if (namesv && namesv != &PL_sv_undef)
172	{
173	char name = SvPVX (namesv); / XXX */
174	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}
178	else
179	{ /* our own lexical */
180	SV *sv;
181	if (*name == '&')
182	sv = SvREFCNT_inc (ppad[ix]);
183	else if (*name == '@')
184	sv = (SV *) newAV ();
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	if (!SvPADBUSY (sv))
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
194	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV kid = cv_clone((CV)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225
226	return newpadlist;
227	}
228
229	#ifdef MAY_FLUSH
230	STATIC void
231	free_padlist (AV *padlist)
232	{
233	/* may be during global destruction */
234	if (SvREFCNT(padlist))
235	{
236	I32 i = AvFILLp(padlist);
237	while (i >= 0)
238	{
239	SV **svp = av_fetch(padlist, i--, FALSE);
240	SV sv = svp ? svp : Nullsv;
241	if (sv)
242	SvREFCNT_dec(sv);
243	}
244
245	SvREFCNT_dec((SV*)padlist);
246	}
247	}
248	#endif
249
250	/* the next two functions merely cache the padlists */
251	STATIC void
252	get_padlist (CV *cv)
253	{
254	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
255
256	if (he && AvFILLp ((AV )he) >= 0)
257	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
258	else
259	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
260	}
261
262	STATIC void
263	put_padlist (CV *cv)
264	{
265	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
266
267	if (SvTYPE (*he) != SVt_PVAV)
268	{
269	SvREFCNT_dec (*he);
270	he = (SV )newAV ();
271	}
272
273	av_push ((AV )he, (SV *)CvPADLIST (cv));
274	}
275
276	#ifdef MAY_FLUSH
277	STATIC void
278	flush_padlist_cache ()
279	{
280	HV *hv = padlist_cache;
281	padlist_cache = newHV ();
282
283	if (hv_iterinit (hv))
284	{
285	HE *he;
286	AV *padlist;
287
288	while (!!(he = hv_iternext (hv)))
289	{
290	AV av = (AV )HeVAL(he);
291
292	/* casting is fun. */
293	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
294	free_padlist (padlist);
295	}
296	}
297
298	SvREFCNT_dec (hv);
299	}
300	#endif
301
302	#define SB do {
303	#define SE } while (0)
304
305	#define LOAD(state) load_state(aTHX_ (state));
306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
307
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
309
310	static void
311	load_state(pTHX_ Coro__State c)
312	{
313	PL_dowarn = c->dowarn;
314	PL_in_eval = c->in_eval;
315
316	PL_curstackinfo = c->curstackinfo;
317	PL_curstack = c->curstack;
318	PL_mainstack = c->mainstack;
319	PL_stack_sp = c->stack_sp;
320	PL_op = c->op;
321	PL_curpad = c->curpad;
322	PL_comppad = c->comppad;
323	PL_stack_base = c->stack_base;
324	PL_stack_max = c->stack_max;
325	PL_tmps_stack = c->tmps_stack;
326	PL_tmps_floor = c->tmps_floor;
327	PL_tmps_ix = c->tmps_ix;
328	PL_tmps_max = c->tmps_max;
329	PL_markstack = c->markstack;
330	PL_markstack_ptr = c->markstack_ptr;
331	PL_markstack_max = c->markstack_max;
332	PL_scopestack = c->scopestack;
333	PL_scopestack_ix = c->scopestack_ix;
334	PL_scopestack_max = c->scopestack_max;
335	PL_savestack = c->savestack;
336	PL_savestack_ix = c->savestack_ix;
337	PL_savestack_max = c->savestack_max;
338	PL_retstack = c->retstack;
339	PL_retstack_ix = c->retstack_ix;
340	PL_retstack_max = c->retstack_max;
341	PL_curcop = c->curcop;
342	PL_top_env = c->top_env;
343
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347
348	{
349	dSP;
350	CV *cv;
351
352	/* now do the ugly restore mess */
353	while ((cv = (CV *)POPs))
354	{
355	AV padlist = (AV )POPs;
356
357	if (padlist)
358	{
359	put_padlist (cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;
361	#ifdef USE_THREADS
362	/CvOWNER(cv) = (struct perl_thread )POPs;*/
363	#endif
364	}
365
366	++CvDEPTH(cv);
367	}
368
369	PUTBACK;
370	}
371	}
372
373	static void
374	save_state(pTHX_ Coro__State c, int flags)
375	{
376	{
377	dSP;
378	I32 cxix = cxstack_ix;
379	PERL_CONTEXT *ccstk = cxstack;
380	PERL_SI *top_si = PL_curstackinfo;
381
382	/*
383	* the worst thing you can imagine happens first - we have to save
384	* (and reinitialize) all cv's in the whole callchain :(
385	*/
386
387	PUSHs (Nullsv);
388	/* this loop was inspired by pp_caller */
389	for (;;)
390	{
391	while (cxix >= 0)
392	{
393	PERL_CONTEXT *cx = &ccstk[cxix--];
394
395	if (CxTYPE(cx) == CXt_SUB)
396	{
397	CV *cv = cx->blk_sub.cv;
398	if (CvDEPTH(cv))
399	{
400	#ifdef USE_THREADS
401	/XPUSHs ((SV )CvOWNER(cv));*/
402	/CvOWNER(cv) = 0;/
403	/error must unlock this cv etc.. etc.../
404	#endif
405	EXTEND (SP, CvDEPTH(cv)*2);
406
407	while (--CvDEPTH(cv))
408	{
409	/* this tells the restore code to increment CvDEPTH */
410	PUSHs (Nullsv);
411	PUSHs ((SV *)cv);
412	}
413
414	PUSHs ((SV *)CvPADLIST(cv));
415	PUSHs ((SV *)cv);
416
417	get_padlist (cv); /* this is a monster */
418	}
419	}
420	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)
422	{
423	/* I never used formats, so how should I know how these are implemented? */
424	/* my bold guess is as a simple, plain sub... */
425	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
426	}
427	#endif
428	}
429
430	if (top_si->si_type == PERLSI_MAIN)
431	break;
432
433	top_si = top_si->si_prev;
434	ccstk = top_si->si_cxstack;
435	cxix = top_si->si_cxix;
436	}
437
438	PUTBACK;
439	}
440
441	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
444
445	c->dowarn = PL_dowarn;
446	c->in_eval = PL_in_eval;
447
448	c->curstackinfo = PL_curstackinfo;
449	c->curstack = PL_curstack;
450	c->mainstack = PL_mainstack;
451	c->stack_sp = PL_stack_sp;
452	c->op = PL_op;
453	c->curpad = PL_curpad;
454	c->comppad = PL_comppad;
455	c->stack_base = PL_stack_base;
456	c->stack_max = PL_stack_max;
457	c->tmps_stack = PL_tmps_stack;
458	c->tmps_floor = PL_tmps_floor;
459	c->tmps_ix = PL_tmps_ix;
460	c->tmps_max = PL_tmps_max;
461	c->markstack = PL_markstack;
462	c->markstack_ptr = PL_markstack_ptr;
463	c->markstack_max = PL_markstack_max;
464	c->scopestack = PL_scopestack;
465	c->scopestack_ix = PL_scopestack_ix;
466	c->scopestack_max = PL_scopestack_max;
467	c->savestack = PL_savestack;
468	c->savestack_ix = PL_savestack_ix;
469	c->savestack_max = PL_savestack_max;
470	c->retstack = PL_retstack;
471	c->retstack_ix = PL_retstack_ix;
472	c->retstack_max = PL_retstack_max;
473	c->curcop = PL_curcop;
474	c->top_env = PL_top_env;
475	}
476
477	/*
478	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need
481	* a lot of stackspace.
482	*/
483	STATIC void
484	coro_init_stacks (pTHX)
485	{
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490
491	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494
495	New(50,PL_tmps_stack,96,SV*);
496	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;
498	PL_tmps_max = 96;
499
500	New(54,PL_markstack,16,I32);
501	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;
503
504	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;
506	#endif
507
508	New(54,PL_scopestack,16,I32);
509	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;
511
512	New(54,PL_savestack,96,ANY);
513	PL_savestack_ix = 0;
514	PL_savestack_max = 96;
515
516	New(54,PL_retstack,8,OP*);
517	PL_retstack_ix = 0;
518	PL_retstack_max = 8;
519	}
520
521	/*
522	* destroy the stacks, the callchain etc...
523	* still there is a memleak of 128 bytes...
524	*/
525	STATIC void
526	destroy_stacks(pTHX)
527	{
528	if (!IN_DESTRUCT)
529	{
530	/* is this ugly, I ask? */
531	while (PL_scopestack_ix)
532	LEAVE;
533
534	/* sure it is, but more important: is it correct?? :/ */
535	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
536	FREETMPS;
537	}
538
539	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;
541
542	while (PL_curstackinfo)
543	{
544	PERL_SI *p = PL_curstackinfo->si_prev;
545
546	{
547	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */
550	}
551
552	if (!IN_DESTRUCT)
553	{
554	dounwind(-1);
555	SvREFCNT_dec(PL_curstackinfo->si_stack);
556	}
557
558	Safefree(PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);
560	PL_curstackinfo = p;
561	}
562
563	Safefree(PL_tmps_stack);
564	Safefree(PL_markstack);
565	Safefree(PL_scopestack);
566	Safefree(PL_savestack);
567	Safefree(PL_retstack);
568	}
569
570	static void
571	allocate_stack (Coro__State ctx, int alloc)
572	{
573	coro_stack *stack;
574
575	New (0, stack, 1, coro_stack);
576
577	stack->refcnt = 1;
578	stack->usecnt = 1;
579	stack->gencnt = ctx->gencnt = 0;
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif
587	{
588	/FIXME//D//* reasonable stack size! */
589	stack->ssize = -4096 * sizeof (long);
590	New (0, stack->sptr, 4096, long);
591	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}
598
599	static void
600	deallocate_stack (Coro__State ctx)
601	{
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#else
615	Safefree (stack->sptr);
616	#endif
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623
624	static void
625	setup_coro (void *arg)
626	{
627	/*
628	* emulate part of the perl startup here.
629	*/
630	dSP;
631	Coro__State ctx = (Coro__State)arg;
632	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
633
634	coro_init_stacks (aTHX);
635	/PL_curcop = 0;/
636	/PL_in_eval = PL_in_eval;/ /* inherit */
637	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args;
639
640	SPAGAIN;
641
642	if (ctx->stack)
643	{
644	ctx->cursp = 0;
645
646	PUSHMARK(SP);
647	PUTBACK;
648	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
649
650	if (SvTRUE (ERRSV))
651	croak (NULL);
652	else
653	croak ("FATAL: CCTXT coroutine returned!");
654	}
655	else
656	{
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);
662	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;
664
665	PUSHMARK(SP);
666	XPUSHs (sub_init);
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;
677
678	ENTER; /* necessary e.g. for dounwind */
679	}
680	}
681
682	static void
683	continue_coro (void *arg)
684	{
685	/*
686	* this is a _very_ stripped down perl interpreter ;)
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;
692
693	ctx->cursp = 0;
694	PL_op = PL_op->op_next;
695	CALLRUNOPS(aTHX);
696
697	abort ();
698	}
699
700	STATIC void
701	transfer(pTHX_ struct coro prev, struct coro next, int flags)
702	{
703	dSTACKLEVEL;
704	static struct coro *xnext;
705
706	if (prev != next)
707	{
708	xnext = next;
709
710	if (next->mainstack)
711	{
712	SAVE (prev, flags);
713	LOAD (next);
714
715	/* mark this state as in-use */
716	next->mainstack = 0;
717	next->tmps_ix = -2;
718
719	/* stacklevel changed? if yes, grab the stack for us! */
720	if (flags & TRANSFER_SAVE_CCTXT)
721	{
722	if (!prev->stack)
723	allocate_stack (prev, 0);
724	else if (prev->cursp != stacklevel
725	&& prev->stack->usecnt > 1)
726	{
727	prev->gencnt = ++prev->stack->gencnt;
728	prev->stack->usecnt = 1;
729	}
730
731	/* has our stack been invalidated? */
732	if (next->stack && next->stack->gencnt != next->gencnt)
733	{
734	deallocate_stack (next);
735	allocate_stack (next, 1);
736	coro_create (&(next->stack->cctx),
737	continue_coro, (void *)next,
738	next->stack->sptr, labs (next->stack->ssize));
739	}
740
741	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
742	/* don't add any code here */
743	}
744
745	}
746	else if (next->tmps_ix == -2)
747	croak ("tried to transfer to running coroutine");
748	else
749	{
750	SAVE (prev, -1); /* first get rid of the old state */
751
752	if (flags & TRANSFER_SAVE_CCTXT)
753	{
754	if (!prev->stack)
755	allocate_stack (prev, 0);
756
757	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
758	{
759	PL_top_env = &next->start_env;
760
761	setup_coro (next);
762
763	prev->stack->refcnt++;
764	prev->stack->usecnt++;
765	next->stack = prev->stack;
766	next->gencnt = prev->gencnt;
767	}
768	else
769	{
770	allocate_stack (next, 1);
771	coro_create (&(next->stack->cctx),
772	setup_coro, (void *)next,
773	next->stack->sptr, labs (next->stack->ssize));
774	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
775	/* don't add any code here */
776	}
777	}
778	else
779	setup_coro (next);
780	}
781
782	/*
783	* xnext is now either prev or next, depending on wether
784	* we switched the c stack or not. that's why I use a global
785	* variable, that should become thread-specific at one point.
786	*/
787	xnext->cursp = stacklevel;
788	}
789
790	if (coro_mortal)
791	{
792	SvREFCNT_dec (coro_mortal);
793	coro_mortal = 0;
794	}
795	}
796
797	#define SV_CORO(sv,func) \
798	do { \
799	if (SvROK (sv)) \
800	sv = SvRV (sv); \
801	\
802	if (SvTYPE(sv) == SVt_PVHV) \
803	{ \
804	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
805	\
806	if (!he) \
807	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808	\
809	(sv) = SvRV (HeVAL(he)); \
810	} \
811	\
812	/* must also be changed inside Coro::Cont::yield */ \
813	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
814	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
815	\
816	} while(0)
817
818	#define SvSTATE(sv) (struct coro *)SvIV (sv)
819
820	static void
821	api_transfer(pTHX_ SV prev, SV next, int flags)
822	{
823	SV_CORO (prev, "Coro::transfer");
824	SV_CORO (next, "Coro::transfer");
825
826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
827	}
828		250
829	/ Coro ******************************************************************/	251	/ Coro ******************************************************************/
830		252
831	#define PRIO_MAX 3	253	#define PRIO_MAX 3
832	#define PRIO_HIGH 1	254	#define PRIO_HIGH 1
…		…
834	#define PRIO_LOW -1	256	#define PRIO_LOW -1
835	#define PRIO_IDLE -3	257	#define PRIO_IDLE -3
836	#define PRIO_MIN -4	258	#define PRIO_MIN -4
837		259
838	/* for Coro.pm */	260	/* for Coro.pm */
839	static GV coro_current, coro_idle;	261	static SV *coro_current;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;	263	static int coro_nready;
		264	static struct coro *coro_first;
		265
		266	/ lowlevel stuff ********************************************************/
		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,10,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
		278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,10,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,10,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
		298	static AV *
		299	coro_clone_padlist (pTHX_ CV *cv)
		300	{
		301	AV *padlist = CvPADLIST (cv);
		302	AV newpadlist, newpad;
		303
		304	newpadlist = newAV ();
		305	AvREAL_off (newpadlist);
		306	#if PERL_VERSION_ATLEAST (5,10,0)
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		308	#else
		309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		310	#endif
		311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		312	--AvFILLp (padlist);
		313
		314	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		315	av_store (newpadlist, 1, (SV *)newpad);
		316
		317	return newpadlist;
		318	}
842		319
843	static void	320	static void
844	coro_enq (SV *sv)	321	free_padlist (pTHX_ AV *padlist)
845	{	322	{
846	if (SvTYPE (sv) == SVt_PVHV)	323	/* may be during global destruction */
847	{	324	if (SvREFCNT (padlist))
848	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
849	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
850
851	prio = prio > PRIO_MAX ? PRIO_MAX
852	: prio < PRIO_MIN ? PRIO_MIN
853	: prio;
854
855	av_push (coro_ready [prio - PRIO_MIN], sv);
856	coro_nready++;
857
858	return;
859	}	325	{
860		326	I32 i = AvFILLp (padlist);
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");	327	while (i >= 0)
862	}
863
864	static SV *
865	coro_deq (int min_prio)
866	{
867	int prio = PRIO_MAX - PRIO_MIN;
868
869	min_prio -= PRIO_MIN;
870	if (min_prio < 0)
871	min_prio = 0;
872
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)
875	{	328	{
876	coro_nready--;	329	SV **svp = av_fetch (padlist, i--, FALSE);
877	return av_shift (coro_ready[prio]);	330	if (svp)
		331	{
		332	SV *sv;
		333	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		334	SvREFCNT_dec (sv);
		335
		336	SvREFCNT_dec (*svp);
		337	}
878	}	338	}
		339
		340	SvREFCNT_dec ((SV*)padlist);
		341	}
		342	}
		343
		344	static int
		345	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		346	{
		347	AV *padlist;
		348	AV av = (AV )mg->mg_obj;
		349
		350	/* casting is fun. */
		351	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		352	free_padlist (aTHX_ padlist);
879		353
880	return 0;	354	return 0;
881	}	355	}
882		356
883	static void	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
884	api_ready (SV *coro)	358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
		359
		360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
		364
		365	#define CORO_MAGIC(sv,type) \
		366	SvMAGIC (sv) \
		367	? SvMAGIC (sv)->mg_type == type \
		368	? SvMAGIC (sv) \
		369	: mg_find (sv, type) \
		370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
885	{	377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
886	if (SvROK (coro))	381	if (SvROK (coro))
887	coro = SvRV (coro);	382	coro = SvRV (coro);
888		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		400
		401	/* the next two functions merely cache the padlists */
		402	static void
		403	get_padlist (pTHX_ CV *cv)
		404	{
		405	MAGIC *mg = CORO_MAGIC_cv (cv);
		406	AV *av;
		407
		408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
		409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		410	else
		411	{
		412	#if CORO_PREFER_PERL_FUNCTIONS
		413	/* this is probably cleaner, but also slower? */
		414	CV *cp = Perl_cv_clone (cv);
		415	CvPADLIST (cv) = CvPADLIST (cp);
		416	CvPADLIST (cp) = 0;
		417	SvREFCNT_dec (cp);
		418	#else
		419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		420	#endif
		421	}
		422	}
		423
		424	static void
		425	put_padlist (pTHX_ CV *cv)
		426	{
		427	MAGIC *mg = CORO_MAGIC_cv (cv);
		428	AV *av;
		429
		430	if (expect_false (!mg))
		431	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
		432
		433	av = (AV *)mg->mg_obj;
		434
		435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		436	av_extend (av, AvMAX (av) + 1);
		437
		438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		439	}
		440
		441	/ load & save, init *****************************************************/
		442
		443	static void
		444	load_perl (pTHX_ Coro__State c)
		445	{
		446	perl_slots *slot = c->slot;
		447	c->slot = 0;
		448
		449	PL_mainstack = c->mainstack;
		450
		451	GvSV (PL_defgv) = slot->defsv;
		452	GvAV (PL_defgv) = slot->defav;
		453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
		456	#define VAR(name,type) PL_ ## name = slot->name;
		457	# include "state.h"
		458	#undef VAR
		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 (5,10,0)
		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 (5,10,0)
		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 (5,10,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/ coroutine stack handling **********************************************/
		673
		674	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
		675	static int (orig_sigelem_set) (pTHX_ SV sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV old = svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
		723
		724	static void
		725	coro_setup (pTHX_ struct coro *coro)
		726	{
		727	/*
		728	* emulate part of the perl startup here.
		729	*/
		730	coro_init_stacks (aTHX);
		731
		732	PL_runops = RUNOPS_DEFAULT;
		733	PL_curcop = &PL_compiling;
		734	PL_in_eval = EVAL_NULL;
		735	PL_comppad = 0;
		736	PL_curpm = 0;
		737	PL_curpad = 0;
		738	PL_localizing = 0;
		739	PL_dirty = 0;
		740	PL_restartop = 0;
		741	#if PERL_VERSION_ATLEAST (5,10,0)
		742	PL_parser = 0;
		743	#endif
		744
		745	/* recreate the die/warn hooks */
		746	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		747	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		748
		749	GvSV (PL_defgv) = newSV (0);
		750	GvAV (PL_defgv) = coro->args; coro->args = 0;
		751	GvSV (PL_errgv) = newSV (0);
		752	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		753	PL_rs = newSVsv (GvSV (irsgv));
		754	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		755
		756	{
		757	dSP;
		758	LOGOP myop;
		759
		760	Zero (&myop, 1, LOGOP);
		761	myop.op_next = Nullop;
		762	myop.op_flags = OPf_WANT_VOID;
		763
		764	PUSHMARK (SP);
		765	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		766	PUTBACK;
		767	PL_op = (OP *)&myop;
		768	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		769	SPAGAIN;
		770	}
		771
		772	/* this newly created coroutine might be run on an existing cctx which most
		773	* likely was suspended in set_stacklevel, called from entersub.
		774	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		775	* so we ENTER here for symmetry
		776	*/
		777	ENTER;
		778	}
		779
		780	static void
		781	coro_destroy (pTHX_ struct coro *coro)
		782	{
		783	if (!IN_DESTRUCT)
		784	{
		785	/* restore all saved variables and stuff */
		786	LEAVE_SCOPE (0);
		787	assert (PL_tmps_floor == -1);
		788
		789	/* free all temporaries */
		790	FREETMPS;
		791	assert (PL_tmps_ix == -1);
		792
		793	/* unwind all extra stacks */
		794	POPSTACK_TO (PL_mainstack);
		795
		796	/* unwind main stack */
		797	dounwind (-1);
		798	}
		799
		800	SvREFCNT_dec (GvSV (PL_defgv));
		801	SvREFCNT_dec (GvAV (PL_defgv));
		802	SvREFCNT_dec (GvSV (PL_errgv));
		803	SvREFCNT_dec (PL_defoutgv);
		804	SvREFCNT_dec (PL_rs);
		805	SvREFCNT_dec (GvSV (irsgv));
		806
		807	SvREFCNT_dec (PL_diehook);
		808	SvREFCNT_dec (PL_warnhook);
		809
		810	SvREFCNT_dec (coro->saved_deffh);
		811	SvREFCNT_dec (coro->throw);
		812
		813	coro_destroy_stacks (aTHX);
		814	}
		815
		816	static void
		817	free_coro_mortal (pTHX)
		818	{
		819	if (expect_true (coro_mortal))
		820	{
		821	SvREFCNT_dec (coro_mortal);
		822	coro_mortal = 0;
		823	}
		824	}
		825
		826	static int
		827	runops_trace (pTHX)
		828	{
		829	COP *oldcop = 0;
		830	int oldcxix = -2;
		831	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		832	coro_cctx *cctx = coro->cctx;
		833
		834	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		835	{
		836	PERL_ASYNC_CHECK ();
		837
		838	if (cctx->flags & CC_TRACE_ALL)
		839	{
		840	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		841	{
		842	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		843	SV bot, top;
		844	AV av = newAV (); / return values */
		845	SV **cb;
		846	dSP;
		847
		848	GV *gv = CvGV (cx->blk_sub.cv);
		849	SV *fullname = sv_2mortal (newSV (0));
		850	if (isGV (gv))
		851	gv_efullname3 (fullname, gv, 0);
		852
		853	bot = PL_stack_base + cx->blk_oldsp + 1;
		854	top = cx->blk_gimme == G_ARRAY ? SP + 1
		855	: cx->blk_gimme == G_SCALAR ? bot + 1
		856	: bot;
		857
		858	av_extend (av, top - bot);
		859	while (bot < top)
		860	av_push (av, SvREFCNT_inc (*bot++));
		861
		862	PL_runops = RUNOPS_DEFAULT;
		863	ENTER;
		864	SAVETMPS;
		865	EXTEND (SP, 3);
		866	PUSHMARK (SP);
		867	PUSHs (&PL_sv_no);
		868	PUSHs (fullname);
		869	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		870	PUTBACK;
		871	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		872	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		873	SPAGAIN;
		874	FREETMPS;
		875	LEAVE;
		876	PL_runops = runops_trace;
		877	}
		878
		879	if (oldcop != PL_curcop)
		880	{
		881	oldcop = PL_curcop;
		882
		883	if (PL_curcop != &PL_compiling)
		884	{
		885	SV **cb;
		886
		887	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		888	{
		889	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		890
		891	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		892	{
		893	runops_proc_t old_runops = PL_runops;
		894	dSP;
		895	GV *gv = CvGV (cx->blk_sub.cv);
		896	SV *fullname = sv_2mortal (newSV (0));
		897
		898	if (isGV (gv))
		899	gv_efullname3 (fullname, gv, 0);
		900
		901	PL_runops = RUNOPS_DEFAULT;
		902	ENTER;
		903	SAVETMPS;
		904	EXTEND (SP, 3);
		905	PUSHMARK (SP);
		906	PUSHs (&PL_sv_yes);
		907	PUSHs (fullname);
		908	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		909	PUTBACK;
		910	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		911	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		912	SPAGAIN;
		913	FREETMPS;
		914	LEAVE;
		915	PL_runops = runops_trace;
		916	}
		917
		918	oldcxix = cxstack_ix;
		919	}
		920
		921	if (cctx->flags & CC_TRACE_LINE)
		922	{
		923	dSP;
		924
		925	PL_runops = RUNOPS_DEFAULT;
		926	ENTER;
		927	SAVETMPS;
		928	EXTEND (SP, 3);
		929	PL_runops = RUNOPS_DEFAULT;
		930	PUSHMARK (SP);
		931	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		932	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		933	PUTBACK;
		934	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		935	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		936	SPAGAIN;
		937	FREETMPS;
		938	LEAVE;
		939	PL_runops = runops_trace;
		940	}
		941	}
		942	}
		943	}
		944	}
		945
		946	TAINT_NOT;
		947	return 0;
		948	}
		949
		950	/* inject a fake call to Coro::State::_cctx_init into the execution */
		951	/* _cctx_init should be careful, as it could be called at almost any time */
		952	/* during execution of a perl program */
		953	static void NOINLINE
		954	cctx_prepare (pTHX_ coro_cctx *cctx)
		955	{
		956	dSP;
		957	LOGOP myop;
		958
		959	PL_top_env = &PL_start_env;
		960
		961	if (cctx->flags & CC_TRACE)
		962	PL_runops = runops_trace;
		963
		964	Zero (&myop, 1, LOGOP);
		965	myop.op_next = PL_op;
		966	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		967
		968	PUSHMARK (SP);
		969	EXTEND (SP, 2);
		970	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		971	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		972	PUTBACK;
		973	PL_op = (OP *)&myop;
		974	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		975	SPAGAIN;
		976	}
		977
		978	/*
		979	* this is a _very_ stripped down perl interpreter ;)
		980	*/
		981	static void
		982	cctx_run (void *arg)
		983	{
		984	dTHX;
		985
		986	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		987	UNLOCK;
		988
		989	/* we now skip the entersub that lead to transfer() */
		990	PL_op = PL_op->op_next;
		991
		992	/* inject a fake subroutine call to cctx_init */
		993	cctx_prepare (aTHX_ (coro_cctx *)arg);
		994
		995	/* somebody or something will hit me for both perl_run and PL_restartop */
		996	PL_restartop = PL_op;
		997	perl_run (PL_curinterp);
		998
		999	/*
		1000	* If perl-run returns we assume exit() was being called or the coro
		1001	* fell off the end, which seems to be the only valid (non-bug)
		1002	* reason for perl_run to return. We try to exit by jumping to the
		1003	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1004	* coroutine as Coro has no such concept
		1005	*/
		1006	PL_top_env = main_top_env;
		1007	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1008	}
		1009
		1010	static coro_cctx *
		1011	cctx_new ()
		1012	{
		1013	coro_cctx *cctx;
		1014	void *stack_start;
		1015	size_t stack_size;
		1016
		1017	++cctx_count;
		1018
		1019	Newz (0, cctx, 1, coro_cctx);
		1020
		1021	#if HAVE_MMAP
		1022	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1023	/* mmap supposedly does allocate-on-write for us */
		1024	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		1025
		1026	if (cctx->sptr != (void *)-1)
		1027	{
		1028	# if CORO_STACKGUARD
		1029	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1030	# endif
		1031	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1032	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1033	cctx->flags \|= CC_MAPPED;
		1034	}
		1035	else
		1036	#endif
		1037	{
		1038	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1039	New (0, cctx->sptr, coro_stacksize, long);
		1040
		1041	if (!cctx->sptr)
		1042	{
		1043	perror ("FATAL: unable to allocate stack for coroutine");
		1044	_exit (EXIT_FAILURE);
		1045	}
		1046
		1047	stack_start = cctx->sptr;
		1048	stack_size = cctx->ssize;
		1049	}
		1050
		1051	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		1052	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1053
		1054	return cctx;
		1055	}
		1056
		1057	static void
		1058	cctx_destroy (coro_cctx *cctx)
		1059	{
		1060	if (!cctx)
		1061	return;
		1062
		1063	--cctx_count;
		1064
		1065	#if CORO_USE_VALGRIND
		1066	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1067	#endif
		1068
		1069	#if HAVE_MMAP
		1070	if (cctx->flags & CC_MAPPED)
		1071	munmap (cctx->sptr, cctx->ssize);
		1072	else
		1073	#endif
		1074	Safefree (cctx->sptr);
		1075
		1076	Safefree (cctx);
		1077	}
		1078
		1079	/* wether this cctx should be destructed */
		1080	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1081
		1082	static coro_cctx *
		1083	cctx_get (pTHX)
		1084	{
		1085	while (expect_true (cctx_first))
		1086	{
		1087	coro_cctx *cctx = cctx_first;
		1088	cctx_first = cctx->next;
		1089	--cctx_idle;
		1090
		1091	if (expect_true (!CCTX_EXPIRED (cctx)))
		1092	return cctx;
		1093
		1094	cctx_destroy (cctx);
		1095	}
		1096
		1097	return cctx_new ();
		1098	}
		1099
		1100	static void
		1101	cctx_put (coro_cctx *cctx)
		1102	{
		1103	/* free another cctx if overlimit */
		1104	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1105	{
		1106	coro_cctx *first = cctx_first;
		1107	cctx_first = first->next;
		1108	--cctx_idle;
		1109
		1110	cctx_destroy (first);
		1111	}
		1112
		1113	++cctx_idle;
		1114	cctx->next = cctx_first;
		1115	cctx_first = cctx;
		1116	}
		1117
		1118	/ coroutine switching ***************************************************/
		1119
		1120	static void
		1121	transfer_check (pTHX_ struct coro prev, struct coro next)
		1122	{
		1123	if (expect_true (prev != next))
		1124	{
		1125	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1126	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1127
		1128	if (expect_false (next->flags & CF_RUNNING))
		1129	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (expect_false (next->flags & CF_DESTROYED))
		1132	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1133
		1134	#if !PERL_VERSION_ATLEAST (5,10,0)
		1135	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1136	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1137	#endif
		1138	}
		1139	}
		1140
		1141	/* always use the TRANSFER macro */
		1142	static void NOINLINE
		1143	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
		1144	{
		1145	dSTACKLEVEL;
		1146	static volatile int has_throw;
		1147
		1148	/* sometimes transfer is only called to set idle_sp */
		1149	if (expect_false (!next))
		1150	{
		1151	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1152	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1153	}
		1154	else if (expect_true (prev != next))
		1155	{
		1156	coro_cctx *prev__cctx;
		1157
		1158	if (expect_false (prev->flags & CF_NEW))
		1159	{
		1160	/* create a new empty context */
		1161	Newz (0, prev->cctx, 1, coro_cctx);
		1162	prev->flags &= ~CF_NEW;
		1163	prev->flags \|= CF_RUNNING;
		1164	}
		1165
		1166	prev->flags &= ~CF_RUNNING;
		1167	next->flags \|= CF_RUNNING;
		1168
		1169	LOCK;
		1170
		1171	/* first get rid of the old state */
		1172	save_perl (aTHX_ prev);
		1173
		1174	if (expect_false (next->flags & CF_NEW))
		1175	{
		1176	/* need to start coroutine */
		1177	next->flags &= ~CF_NEW;
		1178	/* setup coroutine call */
		1179	coro_setup (aTHX_ next);
		1180	}
		1181	else
		1182	load_perl (aTHX_ next);
		1183
		1184	prev__cctx = prev->cctx;
		1185
		1186	/* possibly "free" the cctx */
		1187	if (expect_true (
		1188	prev__cctx->idle_sp == STACKLEVEL
		1189	&& !(prev__cctx->flags & CC_TRACE)
		1190	&& !force_cctx
		1191	))
		1192	{
		1193	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1194	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1195
		1196	prev->cctx = 0;
		1197
		1198	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1199	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1200	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1201	if (!next->cctx)
		1202	next->cctx = cctx_get (aTHX);
		1203
		1204	cctx_put (prev__cctx);
		1205	}
		1206
		1207	++next->usecount;
		1208
		1209	if (expect_true (!next->cctx))
		1210	next->cctx = cctx_get (aTHX);
		1211
		1212	has_throw = !!next->throw;
		1213
		1214	if (expect_false (prev__cctx != next->cctx))
		1215	{
		1216	prev__cctx->top_env = PL_top_env;
		1217	PL_top_env = next->cctx->top_env;
		1218	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1219	}
		1220
		1221	free_coro_mortal (aTHX);
		1222	UNLOCK;
		1223
		1224	if (expect_false (has_throw))
		1225	{
		1226	struct coro *coro = SvSTATE (coro_current);
		1227
		1228	if (coro->throw)
		1229	{
		1230	SV *exception = coro->throw;
		1231	coro->throw = 0;
		1232	sv_setsv (ERRSV, exception);
		1233	croak (0);
		1234	}
		1235	}
		1236	}
		1237	}
		1238
		1239	struct transfer_args
		1240	{
		1241	struct coro prev, next;
		1242	};
		1243
		1244	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1245	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1246
		1247	/ high level stuff ******************************************************/
		1248
		1249	static int
		1250	coro_state_destroy (pTHX_ struct coro *coro)
		1251	{
		1252	if (coro->flags & CF_DESTROYED)
		1253	return 0;
		1254
		1255	coro->flags \|= CF_DESTROYED;
		1256
		1257	if (coro->flags & CF_READY)
		1258	{
		1259	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1260	/* alternative: look through all ready queues and remove the coro */
		1261	LOCK;
		1262	--coro_nready;
		1263	UNLOCK;
		1264	}
		1265	else
		1266	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1267
		1268	if (coro->mainstack && coro->mainstack != main_mainstack)
		1269	{
		1270	struct coro temp;
		1271
		1272	if (coro->flags & CF_RUNNING)
		1273	croak ("FATAL: tried to destroy currently running coroutine");
		1274
		1275	save_perl (aTHX_ &temp);
		1276	load_perl (aTHX_ coro);
		1277
		1278	coro_destroy (aTHX_ coro);
		1279
		1280	load_perl (aTHX_ &temp);
		1281
		1282	coro->slot = 0;
		1283	}
		1284
		1285	cctx_destroy (coro->cctx);
		1286	SvREFCNT_dec (coro->args);
		1287
		1288	if (coro->next) coro->next->prev = coro->prev;
		1289	if (coro->prev) coro->prev->next = coro->next;
		1290	if (coro == coro_first) coro_first = coro->next;
		1291
		1292	return 1;
		1293	}
		1294
		1295	static int
		1296	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1297	{
		1298	struct coro coro = (struct coro )mg->mg_ptr;
		1299	mg->mg_ptr = 0;
		1300
		1301	coro->hv = 0;
		1302
		1303	if (--coro->refcnt < 0)
		1304	{
		1305	coro_state_destroy (aTHX_ coro);
		1306	Safefree (coro);
		1307	}
		1308
		1309	return 0;
		1310	}
		1311
		1312	static int
		1313	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1314	{
		1315	struct coro coro = (struct coro )mg->mg_ptr;
		1316
		1317	++coro->refcnt;
		1318
		1319	return 0;
		1320	}
		1321
		1322	static MGVTBL coro_state_vtbl = {
		1323	0, 0, 0, 0,
		1324	coro_state_free,
		1325	0,
		1326	#ifdef MGf_DUP
		1327	coro_state_dup,
		1328	#else
		1329	# define MGf_DUP 0
		1330	#endif
		1331	};
		1332
		1333	static void
		1334	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1335	{
		1336	ta->prev = SvSTATE (prev_sv);
		1337	ta->next = SvSTATE (next_sv);
		1338	TRANSFER_CHECK (*ta);
		1339	}
		1340
		1341	static void
		1342	api_transfer (SV prev_sv, SV next_sv)
		1343	{
		1344	dTHX;
		1345	struct transfer_args ta;
		1346
		1347	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1348	TRANSFER (ta, 1);
		1349	}
		1350
		1351	/ Coro ******************************************************************/
		1352
		1353	static void
		1354	coro_enq (pTHX_ SV *coro_sv)
		1355	{
		1356	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1357	}
		1358
		1359	static SV *
		1360	coro_deq (pTHX)
		1361	{
		1362	int prio;
		1363
		1364	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1365	if (AvFILLp (coro_ready [prio]) >= 0)
		1366	return av_shift (coro_ready [prio]);
		1367
		1368	return 0;
		1369	}
		1370
		1371	static int
		1372	api_ready (SV *coro_sv)
		1373	{
		1374	dTHX;
		1375	struct coro *coro;
		1376
		1377	if (SvROK (coro_sv))
		1378	coro_sv = SvRV (coro_sv);
		1379
		1380	coro = SvSTATE (coro_sv);
		1381
		1382	if (coro->flags & CF_READY)
		1383	return 0;
		1384
		1385	coro->flags \|= CF_READY;
		1386
		1387	LOCK;
889	coro_enq (SvREFCNT_inc (coro));	1388	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1389	++coro_nready;
		1390	UNLOCK;
		1391
		1392	return 1;
		1393	}
		1394
		1395	static int
		1396	api_is_ready (SV *coro_sv)
		1397	{
		1398	dTHX;
		1399	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1400	}
		1401
		1402	static void
		1403	prepare_schedule (pTHX_ struct transfer_args *ta)
		1404	{
		1405	SV prev_sv, next_sv;
		1406
		1407	for (;;)
		1408	{
		1409	LOCK;
		1410	next_sv = coro_deq (aTHX);
		1411
		1412	/* nothing to schedule: call the idle handler */
		1413	if (expect_false (!next_sv))
		1414	{
		1415	dSP;
		1416	UNLOCK;
		1417
		1418	ENTER;
		1419	SAVETMPS;
		1420
		1421	PUSHMARK (SP);
		1422	PUTBACK;
		1423	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1424	SPAGAIN;
		1425
		1426	FREETMPS;
		1427	LEAVE;
		1428	continue;
		1429	}
		1430
		1431	ta->next = SvSTATE (next_sv);
		1432
		1433	/* cannot transfer to destroyed coros, skip and look for next */
		1434	if (expect_false (ta->next->flags & CF_DESTROYED))
		1435	{
		1436	UNLOCK;
		1437	SvREFCNT_dec (next_sv);
		1438	/* coro_nready is already taken care of by destroy */
		1439	continue;
		1440	}
		1441
		1442	--coro_nready;
		1443	UNLOCK;
		1444	break;
		1445	}
		1446
		1447	/* free this only after the transfer */
		1448	prev_sv = SvRV (coro_current);
		1449	ta->prev = SvSTATE (prev_sv);
		1450	TRANSFER_CHECK (*ta);
		1451	assert (ta->next->flags & CF_READY);
		1452	ta->next->flags &= ~CF_READY;
		1453	SvRV_set (coro_current, next_sv);
		1454
		1455	LOCK;
		1456	free_coro_mortal (aTHX);
		1457	coro_mortal = prev_sv;
		1458	UNLOCK;
		1459	}
		1460
		1461	static void
		1462	prepare_cede (pTHX_ struct transfer_args *ta)
		1463	{
		1464	api_ready (coro_current);
		1465	prepare_schedule (aTHX_ ta);
		1466	}
		1467
		1468	static int
		1469	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1470	{
		1471	if (coro_nready)
		1472	{
		1473	SV *prev = SvRV (coro_current);
		1474	prepare_schedule (aTHX_ ta);
		1475	api_ready (prev);
		1476	return 1;
		1477	}
		1478	else
		1479	return 0;
890	}	1480	}
891		1481
892	static void	1482	static void
893	api_schedule (void)	1483	api_schedule (void)
894	{	1484	{
895	SV prev, next;	1485	dTHX;
		1486	struct transfer_args ta;
896		1487
897	prev = SvRV (GvSV (coro_current));	1488	prepare_schedule (aTHX_ &ta);
898	next = coro_deq (PRIO_MIN);	1489	TRANSFER (ta, 1);
		1490	}
899		1491
900	if (!next)	1492	static int
901	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1493	api_cede (void)
		1494	{
		1495	dTHX;
		1496	struct transfer_args ta;
902		1497
903	/* free this only after the transfer */	1498	prepare_cede (aTHX_ &ta);
904	coro_mortal = prev;
905	SV_CORO (prev, "Coro::schedule");
906		1499
907	SvRV (GvSV (coro_current)) = next;	1500	if (expect_true (ta.prev != ta.next))
		1501	{
		1502	TRANSFER (ta, 1);
		1503	return 1;
		1504	}
		1505	else
		1506	return 0;
		1507	}
908		1508
909	SV_CORO (next, "Coro::schedule");	1509	static int
		1510	api_cede_notself (void)
		1511	{
		1512	dTHX;
		1513	struct transfer_args ta;
910		1514
911	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1515	if (prepare_cede_notself (aTHX_ &ta))
912	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);	1516	{
		1517	TRANSFER (ta, 1);
		1518	return 1;
		1519	}
		1520	else
		1521	return 0;
913	}	1522	}
914		1523
915	static void	1524	static void
916	api_cede (void)	1525	api_trace (SV *coro_sv, int flags)
917	{	1526	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1527	dTHX;
		1528	struct coro *coro = SvSTATE (coro_sv);
919		1529
920	api_schedule ();	1530	if (flags & CC_TRACE)
921	}	1531	{
		1532	if (!coro->cctx)
		1533	coro->cctx = cctx_new ();
		1534	else if (!(coro->cctx->flags & CC_TRACE))
		1535	croak ("cannot enable tracing on coroutine with custom stack");
922		1536
		1537	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1538	}
		1539	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1540	{
		1541	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1542
		1543	if (coro->flags & CF_RUNNING)
		1544	PL_runops = RUNOPS_DEFAULT;
		1545	else
		1546	coro->slot->runops = RUNOPS_DEFAULT;
		1547	}
		1548	}
		1549
923	MODULE = Coro::State PACKAGE = Coro::State	1550	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
924		1551
925	PROTOTYPES: ENABLE	1552	PROTOTYPES: DISABLE
926		1553
927	BOOT:	1554	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	1555	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1556	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1557	MUTEX_INIT (&coro_mutex);
		1558	#endif
		1559	BOOT_PAGESIZE;
		1560
		1561	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1562	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1563
		1564	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1565	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1566	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1567	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1568
		1569	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1570	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1571	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1572
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1573	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1574
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1576	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1577	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1578	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
937
938	if (!padlist_cache)
939	padlist_cache = newHV ();
940		1579
941	main_mainstack = PL_mainstack;	1580	main_mainstack = PL_mainstack;
		1581	main_top_env = PL_top_env;
		1582
		1583	while (main_top_env->je_prev)
		1584	main_top_env = main_top_env->je_prev;
942		1585
943	coroapi.ver = CORO_API_VERSION;	1586	coroapi.ver = CORO_API_VERSION;
		1587	coroapi.rev = CORO_API_REVISION;
944	coroapi.transfer = api_transfer;	1588	coroapi.transfer = api_transfer;
945	}
946		1589
947	Coro::State	1590	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
948	_newprocess(args)	1591	}
949	SV * args	1592
950	PROTOTYPE: $	1593	SV *
		1594	new (char *klass, ...)
951	CODE:	1595	CODE:
952	Coro__State coro;	1596	{
		1597	struct coro *coro;
		1598	MAGIC *mg;
		1599	HV *hv;
		1600	int i;
953		1601
954	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
955	croak ("Coro::State::_newprocess expects an arrayref");
956
957	New (0, coro, 1, struct coro);	1602	Newz (0, coro, 1, struct coro);
		1603	coro->args = newAV ();
		1604	coro->flags = CF_NEW;
958		1605
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1606	if (coro_first) coro_first->prev = coro;
960	coro->mainstack = 0; /* actual work is done inside transfer */	1607	coro->next = coro_first;
961	coro->stack = 0;	1608	coro_first = coro;
962		1609
963	/* same as JMPENV_BOOTSTRAP */	1610	coro->hv = hv = newHV ();
964	/* we might be able to recycle start_env, but safe is safe */	1611	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
965	Zero(&coro->start_env, 1, JMPENV);	1612	mg->mg_flags \|= MGf_DUP;
966	coro->start_env.je_ret = -1;	1613	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
967	coro->start_env.je_mustcatch = TRUE;
968		1614
969	RETVAL = coro;	1615	av_extend (coro->args, items - 1);
		1616	for (i = 1; i < items; i++)
		1617	av_push (coro->args, newSVsv (ST (i)));
		1618	}
970	OUTPUT:	1619	OUTPUT:
971	RETVAL	1620	RETVAL
972		1621
		1622	# these not obviously related functions are all rolled into the same xs
		1623	# function to increase chances that they all will call transfer with the same
		1624	# stack offset
973	void	1625	void
974	transfer(prev, next, flags)	1626	_set_stacklevel (...)
975	SV *prev	1627	ALIAS:
976	SV *next	1628	Coro::State::transfer = 1
977	int flags	1629	Coro::schedule = 2
978	PROTOTYPE: @	1630	Coro::cede = 3
		1631	Coro::cede_notself = 4
979	CODE:	1632	CODE:
		1633	{
		1634	struct transfer_args ta;
		1635
980	PUTBACK;	1636	PUTBACK;
981	SV_CORO (next, "Coro::transfer");	1637	switch (ix)
982	SV_CORO (prev, "Coro::transfer");	1638	{
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1639	case 0:
		1640	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1641	ta.next = 0;
		1642	break;
		1643
		1644	case 1:
		1645	if (items != 2)
		1646	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1647
		1648	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1649	break;
		1650
		1651	case 2:
		1652	prepare_schedule (aTHX_ &ta);
		1653	break;
		1654
		1655	case 3:
		1656	prepare_cede (aTHX_ &ta);
		1657	break;
		1658
		1659	case 4:
		1660	if (!prepare_cede_notself (aTHX_ &ta))
		1661	XSRETURN_EMPTY;
		1662
		1663	break;
		1664	}
984	SPAGAIN;	1665	SPAGAIN;
985		1666
		1667	BARRIER;
		1668	PUTBACK;
		1669	TRANSFER (ta, 0);
		1670	SPAGAIN; /* might be the sp of a different coroutine now */
		1671	/* be extra careful not to ever do anything after TRANSFER */
		1672	}
		1673
		1674	bool
		1675	_destroy (SV *coro_sv)
		1676	CODE:
		1677	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1678	OUTPUT:
		1679	RETVAL
		1680
986	void	1681	void
987	DESTROY(coro)
988	Coro::State coro
989	CODE:
990
991	if (coro->mainstack && coro->mainstack != main_mainstack)
992	{
993	struct coro temp;
994
995	PUTBACK;
996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
997	LOAD(aTHX_ coro);
998	SPAGAIN;
999
1000	destroy_stacks (aTHX);
1001
1002	LOAD((&temp)); /* this will get rid of defsv etc.. */
1003	SPAGAIN;
1004
1005	coro->mainstack = 0;
1006	}
1007
1008	deallocate_stack (coro);
1009
1010	Safefree (coro);
1011
1012	void
1013	flush()
1014	CODE:
1015	#ifdef MAY_FLUSH
1016	flush_padlist_cache ();
1017	#endif
1018
1019	void
1020	_exit(code)	1682	_exit (code)
1021	int code	1683	int code
1022	PROTOTYPE: $	1684	PROTOTYPE: $
1023	CODE:	1685	CODE:
1024	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
1025	_exit (code);	1686	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1687
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1688	int
		1689	cctx_stacksize (int new_stacksize = 0)
		1690	CODE:
		1691	RETVAL = coro_stacksize;
		1692	if (new_stacksize)
		1693	coro_stacksize = new_stacksize;
		1694	OUTPUT:
		1695	RETVAL
1033		1696
1034	# this is slightly dirty (should expose a c-level api)	1697	int
		1698	cctx_count ()
		1699	CODE:
		1700	RETVAL = cctx_count;
		1701	OUTPUT:
		1702	RETVAL
		1703
		1704	int
		1705	cctx_idle ()
		1706	CODE:
		1707	RETVAL = cctx_idle;
		1708	OUTPUT:
		1709	RETVAL
1035		1710
1036	void	1711	void
1037	yield(...)	1712	list ()
1038	PROTOTYPE: @	1713	PPCODE:
		1714	{
		1715	struct coro *coro;
		1716	for (coro = coro_first; coro; coro = coro->next)
		1717	if (coro->hv)
		1718	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1719	}
		1720
		1721	void
		1722	call (Coro::State coro, SV *coderef)
		1723	ALIAS:
		1724	eval = 1
		1725	CODE:
		1726	{
		1727	if (coro->mainstack)
		1728	{
		1729	struct coro temp;
		1730
		1731	if (!(coro->flags & CF_RUNNING))
		1732	{
		1733	PUTBACK;
		1734	save_perl (aTHX_ &temp);
		1735	load_perl (aTHX_ coro);
		1736	}
		1737
		1738	{
		1739	dSP;
		1740	ENTER;
		1741	SAVETMPS;
		1742	PUTBACK;
		1743	PUSHSTACK;
		1744	PUSHMARK (SP);
		1745
		1746	if (ix)
		1747	eval_sv (coderef, 0);
		1748	else
		1749	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1750
		1751	POPSTACK;
		1752	SPAGAIN;
		1753	FREETMPS;
		1754	LEAVE;
		1755	PUTBACK;
		1756	}
		1757
		1758	if (!(coro->flags & CF_RUNNING))
		1759	{
		1760	save_perl (aTHX_ coro);
		1761	load_perl (aTHX_ &temp);
		1762	SPAGAIN;
		1763	}
		1764	}
		1765	}
		1766
		1767	SV *
		1768	is_ready (Coro::State coro)
		1769	PROTOTYPE: $
		1770	ALIAS:
		1771	is_ready = CF_READY
		1772	is_running = CF_RUNNING
		1773	is_new = CF_NEW
		1774	is_destroyed = CF_DESTROYED
		1775	CODE:
		1776	RETVAL = boolSV (coro->flags & ix);
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	void
		1781	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1782
		1783	SV *
		1784	has_stack (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = boolSV (!!coro->cctx);
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	int
		1792	is_traced (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	IV
		1800	rss (Coro::State coro)
		1801	PROTOTYPE: $
		1802	ALIAS:
		1803	usecount = 1
1039	CODE:	1804	CODE:
1040	static SV *returnstk;	1805	switch (ix)
1041	SV *sv;	1806	{
1042	AV *defav = GvAV (PL_defgv);	1807	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1043	struct coro prev, next;	1808	case 1: RETVAL = coro->usecount; break;
		1809	}
		1810	OUTPUT:
		1811	RETVAL
1044		1812
1045	if (!returnstk)	1813	void
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));	1814	force_cctx ()
1047		1815	CODE:
1048	/* set up @_ -- ugly */	1816	struct coro *coro = SvSTATE (coro_current);
1049	av_clear (defav);	1817	coro->cctx->idle_sp = 0;
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1057	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1818
1062	MODULE = Coro::State PACKAGE = Coro	1819	MODULE = Coro::State PACKAGE = Coro
1063		1820
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1821	BOOT:
1067	{	1822	{
1068	int i;	1823	int i;
		1824
		1825	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1826	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1827	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1828
		1829	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1830	SvREADONLY_on (coro_current);
		1831
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1832	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1833
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1834	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1835	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1836	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1837	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1838	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1839	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1840
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1841	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1842	coro_ready[i] = newAV ();
1083		1843
1084	{	1844	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1845	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1846	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1086		1847
1087	coroapi.schedule = api_schedule;	1848	coroapi.schedule = api_schedule;
1088	coroapi.cede = api_cede;	1849	coroapi.cede = api_cede;
		1850	coroapi.cede_notself = api_cede_notself;
1089	coroapi.ready = api_ready;	1851	coroapi.ready = api_ready;
		1852	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1853	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1854	coroapi.current = coro_current;
1092		1855
1093	GCoroAPI = &coroapi;	1856	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1857	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1858	SvREADONLY_on (sv);
1096	}	1859	}
1097	}	1860	}
1098		1861
1099	void	1862	void
1100	ready(self)	1863	_set_current (SV *current)
1101	SV * self
1102	PROTOTYPE: $	1864	PROTOTYPE: $
1103	CODE:	1865	CODE:
1104	api_ready (self);	1866	SvREFCNT_dec (SvRV (coro_current));
		1867	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1105		1868
1106	int	1869	int
		1870	prio (Coro::State coro, int newprio = 0)
		1871	ALIAS:
		1872	nice = 1
		1873	CODE:
		1874	{
		1875	RETVAL = coro->prio;
		1876
		1877	if (items > 1)
		1878	{
		1879	if (ix)
		1880	newprio = coro->prio - newprio;
		1881
		1882	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1883	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1884
		1885	coro->prio = newprio;
		1886	}
		1887	}
		1888	OUTPUT:
		1889	RETVAL
		1890
		1891	SV *
		1892	ready (SV *self)
		1893	PROTOTYPE: $
		1894	CODE:
		1895	RETVAL = boolSV (api_ready (self));
		1896	OUTPUT:
		1897	RETVAL
		1898
		1899	int
1107	nready(...)	1900	nready (...)
1108	PROTOTYPE:	1901	PROTOTYPE:
1109	CODE:	1902	CODE:
1110	RETVAL = coro_nready;	1903	RETVAL = coro_nready;
1111	OUTPUT:	1904	OUTPUT:
1112	RETVAL	1905	RETVAL
1113		1906
1114	void	1907	void
1115	schedule(...)	1908	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1909	PROTOTYPE: $;$
		1910	CODE:
		1911	SvREFCNT_dec (self->throw);
		1912	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1913
		1914	void
		1915	swap_defsv (Coro::State self)
1116	PROTOTYPE:	1916	PROTOTYPE: $
		1917	ALIAS:
		1918	swap_defav = 1
		1919	CODE:
		1920	if (!self->slot)
		1921	croak ("cannot swap state with coroutine that has no saved state");
		1922	else
		1923	{
		1924	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1925	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
		1926
		1927	SV tmp = src; src = dst; *dst = tmp;
		1928	}
		1929
		1930	# for async_pool speedup
		1931	void
		1932	_pool_1 (SV *cb)
1117	CODE:	1933	CODE:
1118	api_schedule ();	1934	{
		1935	struct coro *coro = SvSTATE (coro_current);
		1936	HV hv = (HV )SvRV (coro_current);
		1937	AV *defav = GvAV (PL_defgv);
		1938	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1939	AV *invoke_av;
		1940	int i, len;
		1941
		1942	if (!invoke)
		1943	{
		1944	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1945	croak ("\3async_pool terminate\2\n");
		1946	}
		1947
		1948	SvREFCNT_dec (coro->saved_deffh);
		1949	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1950
		1951	hv_store (hv, "desc", sizeof ("desc") - 1,
		1952	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1953
		1954	invoke_av = (AV *)SvRV (invoke);
		1955	len = av_len (invoke_av);
		1956
		1957	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1958
		1959	if (len > 0)
		1960	{
		1961	av_fill (defav, len - 1);
		1962	for (i = 0; i < len; ++i)
		1963	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1964	}
		1965
		1966	SvREFCNT_dec (invoke);
		1967	}
1119		1968
1120	void	1969	void
1121	cede(...)	1970	_pool_2 (SV *cb)
1122	PROTOTYPE:
1123	CODE:	1971	CODE:
1124	api_cede ();	1972	{
		1973	struct coro *coro = SvSTATE (coro_current);
1125		1974
		1975	sv_setsv (cb, &PL_sv_undef);
		1976
		1977	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1978	coro->saved_deffh = 0;
		1979
		1980	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1981	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1982	{
		1983	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1984	croak ("\3async_pool terminate\2\n");
		1985	}
		1986
		1987	av_clear (GvAV (PL_defgv));
		1988	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1989	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1990
		1991	coro->prio = 0;
		1992
		1993	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1994	api_trace (coro_current, 0);
		1995
		1996	av_push (av_async_pool, newSVsv (coro_current));
		1997	}
		1998
		1999
		2000	MODULE = Coro::State PACKAGE = Coro::AIO
		2001
		2002	SV *
		2003	_get_state ()
		2004	CODE:
		2005	{
		2006	struct io_state *data;
		2007
		2008	RETVAL = newSV (sizeof (struct io_state));
		2009	data = (struct io_state *)SvPVX (RETVAL);
		2010	SvCUR_set (RETVAL, sizeof (struct io_state));
		2011	SvPOK_only (RETVAL);
		2012
		2013	data->errorno = errno;
		2014	data->laststype = PL_laststype;
		2015	data->laststatval = PL_laststatval;
		2016	data->statcache = PL_statcache;
		2017	}
		2018	OUTPUT:
		2019	RETVAL
		2020
		2021	void
		2022	_set_state (char *data_)
		2023	PROTOTYPE: $
		2024	CODE:
		2025	{
		2026	struct io_state data = (void )data_;
		2027
		2028	errno = data->errorno;
		2029	PL_laststype = data->laststype;
		2030	PL_laststatval = data->laststatval;
		2031	PL_statcache = data->statcache;
		2032	}
		2033

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing Coro/Coro/State.xs (file contents): Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs. Revision 1.230 by root, Mon Apr 14 11:28:59 2008 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.230 by root, Mon Apr 14 11:28:59 2008 UTC