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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.67 by root, Mon Dec 12 20:07:44 2005 UTC vs.
Revision 1.134 by root, Thu Jan 4 23:49:27 2007 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	// threaded perls might need much more, 65536 or more,	9	#include <stdio.h>
12	// which is 0.5 to 1MB	10	#include <errno.h>
13	#define STACKSIZE 16384	11	#include <assert.h>
14		12
15	#if PERL_VERSION < 6	13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
16	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
17	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
18	# endif	52	# endif
19	# ifndef call_sv	53	# ifndef call_sv
20	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
31	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
33	# endif	67	# endif
34	#endif	68	#endif
35		69
36	#include <signal.h>	70	/* 5.8.7 */
37		71	#ifndef SvRV_set
38	#ifdef HAVE_MMAP	72	# define SvRV_set(s,v) SvRV(s) = (v)
39	# include <unistd.h>
40	# include <sys/mman.h>
41	# ifndef MAP_ANONYMOUS
42	# ifdef MAP_ANON
43	# define MAP_ANONYMOUS MAP_ANON
44	# else
45	# undef HAVE_MMAP
46	# endif
47	# endif	73	#endif
48	#endif
49		74
50	#define SUB_INIT "Coro::State::initialize"	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
51	#define UCORO_STATE "_coro_state"	76	# undef STACKGUARD
		77	#endif
		78
		79	#ifndef STACKGUARD
		80	# define STACKGUARD 0
		81	#endif
		82
		83	/* prefer perl internal functions over our own? */
		84	#ifndef PREFER_PERL_FUNCTIONS
		85	# define PREFER_PERL_FUNCTIONS 0
		86	#endif
52		87
53	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
54	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
55	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
56	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
57		93
58	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
59		95
60	#define labs(l) ((l) >= 0 ? (l) : -(l))	96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		99	#else
		100	# define attribute(x)
		101	# define BARRIER
		102	#endif
		103
		104	#define NOINLINE attribute ((noinline))
61		105
62	#include "CoroAPI.h"	106	#include "CoroAPI.h"
63		107
64	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
65	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
66	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
67	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
68	#else	112	#else
69	# define LOCK 0	113	# define LOCK (void)0
70	# define UNLOCK 0	114	# define UNLOCK (void)0
71	#endif	115	#endif
		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
72		124
73	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
74	static AV *main_mainstack; /* used to differentiate between $main and others */	126	static AV *main_mainstack; /* used to differentiate between $main and others */
75	static HV *coro_state_stash;	127	static HV *coro_state_stash, *coro_stash;
76	static SV *ucoro_state_sv;
77	static U32 ucoro_state_hash;
78	static SV *coro_mortal; /* will be freed after next transfer */	128	static SV *coro_mortal; /* will be freed after next transfer */
79		129
80	/* this is actually not only the c stack but also c registers etc... */	130	static struct coro_cctx *cctx_first;
		131	static int cctx_count, cctx_idle;
		132
		133	/* this is a structure representing a c-level coroutine */
81	typedef struct {	134	typedef struct coro_cctx {
82	int refcnt; /* pointer reference counter */	135	struct coro_cctx *next;
83	int usecnt; /* shared by how many coroutines */
84	int gencnt; /* generation counter */
85		136
86	coro_context cctx;	137	/* the stack */
87
88	void *sptr;	138	void *sptr;
89	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
90	} coro_stack;
91		140
		141	/* cpu state */
		142	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		143	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		144	JMPENV *top_env;
		145	coro_context cctx;
		146
		147	int inuse;
		148
		149	#if USE_VALGRIND
		150	int valgrind_id;
		151	#endif
		152	} coro_cctx;
		153
		154	enum {
		155	CF_RUNNING = 0x0001, /* coroutine is running */
		156	CF_READY = 0x0002, /* coroutine is ready */
		157	CF_NEW = 0x0004, /* has never been switched to */
		158	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		159	};
		160
		161	/* this is a structure representing a perl-level coroutine */
92	struct coro {	162	struct coro {
93	/* the top-level JMPENV for each coroutine, needed to catch dies. */	163	/* the c coroutine allocated to this perl coroutine, if any */
94	JMPENV start_env;	164	coro_cctx *cctx;
95
96	/* the optional C context */
97	coro_stack *stack;
98	void *cursp;
99	int gencnt;
100
101	/* optionally saved, might be zero */
102	AV *defav;
103	SV *defsv;
104	SV *errsv;
105
106	/* saved global state not related to stacks */
107	U8 dowarn;
108	I32 in_eval;
109
110	/* the stacks and related info (callchain etc..) */
111	PERL_SI *curstackinfo;
112	AV *curstack;
113	AV *mainstack;
114	SV **stack_sp;
115	OP *op;
116	SV **curpad;
117	AV *comppad;
118	CV *compcv;
119	SV **stack_base;
120	SV **stack_max;
121	SV **tmps_stack;
122	I32 tmps_floor;
123	I32 tmps_ix;
124	I32 tmps_max;
125	I32 *markstack;
126	I32 *markstack_ptr;
127	I32 *markstack_max;
128	I32 *scopestack;
129	I32 scopestack_ix;
130	I32 scopestack_max;
131	ANY *savestack;
132	I32 savestack_ix;
133	I32 savestack_max;
134	OP **retstack;
135	I32 retstack_ix;
136	I32 retstack_max;
137	PMOP *curpm;
138	COP *curcop;
139	JMPENV *top_env;
140		165
141	/* data associated with this coroutine (initial args) */	166	/* data associated with this coroutine (initial args) */
142	AV *args;	167	AV *args;
		168	int refcnt;
		169	int save; /* CORO_SAVE flags */
		170	int flags; /* CF_ flags */
		171
		172	/* optionally saved, might be zero */
		173	AV *defav; /* @_ */
		174	SV *defsv; /* $_ */
		175	SV *errsv; /* $@ */
		176	SV *irssv; /* $/ */
		177	SV *irssv_sv; /* real $/ cache */
		178
		179	#define VAR(name,type) type name;
		180	# include "state.h"
		181	#undef VAR
		182
		183	/* coro process data */
		184	int prio;
143	};	185	};
144		186
145	typedef struct coro *Coro__State;	187	typedef struct coro *Coro__State;
146	typedef struct coro *Coro__State_or_hashref;	188	typedef struct coro *Coro__State_or_hashref;
147		189
148	/* mostly copied from op.c:cv_clone2 */	190	static AV *
149	STATIC AV *	191	coro_clone_padlist (CV *cv)
150	clone_padlist (pTHX_ AV *protopadlist)
151	{	192	{
152	AV *av;	193	AV *padlist = CvPADLIST (cv);
153	I32 ix;
154	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
155	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
156	SV **pname = AvARRAY (protopad_name);
157	SV **ppad = AvARRAY (protopad);
158	I32 fname = AvFILLp (protopad_name);
159	I32 fpad = AvFILLp (protopad);
160	AV *newpadlist, *newpad_name, *newpad;	194	AV *newpadlist, *newpad;
161	SV **npad;
162
163	newpad_name = newAV ();
164	for (ix = fname; ix >= 0; ix--)
165	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
166
167	newpad = newAV ();
168	av_fill (newpad, AvFILLp (protopad));
169	npad = AvARRAY (newpad);
170		195
171	newpadlist = newAV ();	196	newpadlist = newAV ();
172	AvREAL_off (newpadlist);	197	AvREAL_off (newpadlist);
173	av_store (newpadlist, 0, (SV *) newpad_name);	198	#if PERL_VERSION_ATLEAST (5,9,0)
		199	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		200	#else
		201	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		202	#endif
		203	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		204	--AvFILLp (padlist);
		205
		206	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
174	av_store (newpadlist, 1, (SV *) newpad);	207	av_store (newpadlist, 1, (SV *)newpad);
175
176	av = newAV (); /* will be @_ */
177	av_extend (av, 0);
178	av_store (newpad, 0, (SV *) av);
179	AvFLAGS (av) = AVf_REIFY;
180
181	for (ix = fpad; ix > 0; ix--)
182	{
183	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
184
185	if (namesv && namesv != &PL_sv_undef)
186	{
187	char *name = SvPVX (namesv); /* XXX */
188
189	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
190	{ /* lexical from outside? */
191	npad[ix] = SvREFCNT_inc (ppad[ix]);
192	}
193	else
194	{ /* our own lexical */
195	SV *sv;
196	if (*name == '&')
197	sv = SvREFCNT_inc (ppad[ix]);
198	else if (*name == '@')
199	sv = (SV *) newAV ();
200	else if (*name == '%')
201	sv = (SV *) newHV ();
202	else
203	sv = NEWSV (0, 0);
204
205	#ifdef SvPADBUSY
206	if (!SvPADBUSY (sv))
207	#endif
208	SvPADMY_on (sv);
209
210	npad[ix] = sv;
211	}
212	}
213	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
214	{
215	npad[ix] = SvREFCNT_inc (ppad[ix]);
216	}
217	else
218	{
219	SV *sv = NEWSV (0, 0);
220	SvPADTMP_on (sv);
221	npad[ix] = sv;
222	}
223	}
224
225	#if 0 /* return -ENOTUNDERSTOOD */
226	/* Now that vars are all in place, clone nested closures. */
227
228	for (ix = fpad; ix > 0; ix--) {
229	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
230	if (namesv
231	&& namesv != &PL_sv_undef
232	&& !(SvFLAGS(namesv) & SVf_FAKE)
233	&& *SvPVX(namesv) == '&'
234	&& CvCLONE(ppad[ix]))
235	{
236	CV *kid = cv_clone((CV*)ppad[ix]);
237	SvREFCNT_dec(ppad[ix]);
238	CvCLONE_on(kid);
239	SvPADMY_on(kid);
240	npad[ix] = (SV*)kid;
241	}
242	}
243	#endif
244		208
245	return newpadlist;	209	return newpadlist;
246	}	210	}
247		211
248	STATIC void	212	static void
249	free_padlist (pTHX_ AV *padlist)	213	free_padlist (AV *padlist)
250	{	214	{
251	/* may be during global destruction */	215	/* may be during global destruction */
252	if (SvREFCNT (padlist))	216	if (SvREFCNT (padlist))
253	{	217	{
254	I32 i = AvFILLp (padlist);	218	I32 i = AvFILLp (padlist);
…		…
267		231
268	SvREFCNT_dec ((SV*)padlist);	232	SvREFCNT_dec ((SV*)padlist);
269	}	233	}
270	}	234	}
271		235
272	STATIC int	236	static int
273	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	237	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
274	{	238	{
275	AV *padlist;	239	AV *padlist;
276	AV *av = (AV *)mg->mg_obj;	240	AV *av = (AV *)mg->mg_obj;
277		241
278	/* casting is fun. */	242	/* casting is fun. */
279	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	243	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
280	free_padlist (aTHX_ padlist);	244	free_padlist (padlist);
281		245
282	SvREFCNT_dec (av);	246	SvREFCNT_dec (av);
		247
		248	return 0;
283	}	249	}
284		250
285	#define PERL_MAGIC_coro PERL_MAGIC_ext	251	#define PERL_MAGIC_coro PERL_MAGIC_ext
286		252
287	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	253	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
288		254
		255	#define CORO_MAGIC(cv) \
		256	SvMAGIC (cv) \
		257	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		258	? SvMAGIC (cv) \
		259	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		260	: 0
		261
289	/* the next two functions merely cache the padlists */	262	/* the next two functions merely cache the padlists */
290	STATIC void	263	static void
291	get_padlist (pTHX_ CV *cv)	264	get_padlist (CV *cv)
292	{	265	{
293	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	MAGIC *mg = CORO_MAGIC (cv);
		267	AV *av;
294		268
295	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
296	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
297	else	271	else
		272	{
		273	#if PREFER_PERL_FUNCTIONS
		274	/* this is probably cleaner, but also slower? */
		275	CV *cp = Perl_cv_clone (cv);
		276	CvPADLIST (cv) = CvPADLIST (cp);
		277	CvPADLIST (cp) = 0;
		278	SvREFCNT_dec (cp);
		279	#else
298	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	280	CvPADLIST (cv) = coro_clone_padlist (cv);
		281	#endif
		282	}
299	}	283	}
300		284
301	STATIC void	285	static void
302	put_padlist (pTHX_ CV *cv)	286	put_padlist (CV *cv)
303	{	287	{
304	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
305		290
306	if (!mg)	291	if (!mg)
307	{	292	{
308	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
309	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
310	mg->mg_virtual = &vtbl_coro;	295	mg->mg_virtual = &vtbl_coro;
311	mg->mg_obj = (SV *)newAV ();	296	mg->mg_obj = (SV *)newAV ();
312	}	297	}
313		298
314	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	299	av = (AV *)mg->mg_obj;
		300
		301	if (AvFILLp (av) >= AvMAX (av))
		302	av_extend (av, AvMAX (av) + 1);
		303
		304	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
315	}	305	}
316		306
317	#define SB do {	307	#define SB do {
318	#define SE } while (0)	308	#define SE } while (0)
319		309
320	#define LOAD(state) load_state(aTHX_ (state));
321	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
322
323	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
324		311
325	static void	312	static void
326	load_state(pTHX_ Coro__State c)	313	load_perl (Coro__State c)
327	{	314	{
328	PL_dowarn = c->dowarn;	315	#define VAR(name,type) PL_ ## name = c->name;
329	PL_in_eval = c->in_eval;	316	# include "state.h"
330		317	#undef VAR
331	PL_curstackinfo = c->curstackinfo;
332	PL_curstack = c->curstack;
333	PL_mainstack = c->mainstack;
334	PL_stack_sp = c->stack_sp;
335	PL_op = c->op;
336	PL_curpad = c->curpad;
337	PL_comppad = c->comppad;
338	PL_compcv = c->compcv;
339	PL_stack_base = c->stack_base;
340	PL_stack_max = c->stack_max;
341	PL_tmps_stack = c->tmps_stack;
342	PL_tmps_floor = c->tmps_floor;
343	PL_tmps_ix = c->tmps_ix;
344	PL_tmps_max = c->tmps_max;
345	PL_markstack = c->markstack;
346	PL_markstack_ptr = c->markstack_ptr;
347	PL_markstack_max = c->markstack_max;
348	PL_scopestack = c->scopestack;
349	PL_scopestack_ix = c->scopestack_ix;
350	PL_scopestack_max = c->scopestack_max;
351	PL_savestack = c->savestack;
352	PL_savestack_ix = c->savestack_ix;
353	PL_savestack_max = c->savestack_max;
354	PL_retstack = c->retstack;
355	PL_retstack_ix = c->retstack_ix;
356	PL_retstack_max = c->retstack_max;
357	PL_curpm = c->curpm;
358	PL_curcop = c->curcop;
359	PL_top_env = c->top_env;
360		318
361	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	319	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
362	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	320	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
363	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	321	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		322	if (c->irssv)
		323	{
		324	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		325	SvREFCNT_dec (c->irssv);
		326	else
		327	{
		328	REPLACE_SV (PL_rs, c->irssv);
		329	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		330	sv_setsv (c->irssv_sv, PL_rs);
		331	}
		332	}
364		333
365	{	334	{
366	dSP;	335	dSP;
367	CV *cv;	336	CV *cv;
368		337
369	/* now do the ugly restore mess */	338	/* now do the ugly restore mess */
370	while ((cv = (CV *)POPs))	339	while ((cv = (CV *)POPs))
371	{	340	{
372	AV *padlist = (AV *)POPs;
373
374	if (padlist)
375	{
376	put_padlist (aTHX_ cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
377	CvPADLIST(cv) = padlist;	342	CvDEPTH (cv) = PTR2IV (POPs);
378	}	343	CvPADLIST (cv) = (AV *)POPs;
379
380	++CvDEPTH(cv);
381	}	344	}
382		345
383	PUTBACK;	346	PUTBACK;
384	}	347	}
385	}	348	}
386		349
387	static void	350	static void
388	save_state(pTHX_ Coro__State c, int flags)	351	save_perl (Coro__State c)
389	{	352	{
390	{	353	{
391	dSP;	354	dSP;
392	I32 cxix = cxstack_ix;	355	I32 cxix = cxstack_ix;
393	PERL_CONTEXT *ccstk = cxstack;	356	PERL_CONTEXT *ccstk = cxstack;
…		…
396	/*	359	/*
397	* the worst thing you can imagine happens first - we have to save	360	* the worst thing you can imagine happens first - we have to save
398	* (and reinitialize) all cv's in the whole callchain :(	361	* (and reinitialize) all cv's in the whole callchain :(
399	*/	362	*/
400		363
		364	EXTEND (SP, 3 + 1);
401	PUSHs (Nullsv);	365	PUSHs (Nullsv);
402	/* this loop was inspired by pp_caller */	366	/* this loop was inspired by pp_caller */
403	for (;;)	367	for (;;)
404	{	368	{
405	while (cxix >= 0)	369	while (cxix >= 0)
406	{	370	{
407	PERL_CONTEXT *cx = &ccstk[cxix--];	371	PERL_CONTEXT *cx = &ccstk[cxix--];
408		372
409	if (CxTYPE(cx) == CXt_SUB)	373	if (CxTYPE (cx) == CXt_SUB)
410	{	374	{
411	CV *cv = cx->blk_sub.cv;	375	CV *cv = cx->blk_sub.cv;
		376
412	if (CvDEPTH(cv))	377	if (CvDEPTH (cv))
413	{	378	{
414	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, 3);
415
416	while (--CvDEPTH(cv))
417	{
418	/* this tells the restore code to increment CvDEPTH */
419	PUSHs (Nullsv);
420	PUSHs ((SV *)cv);
421	}
422
423	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST (cv));
		381	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
424	PUSHs ((SV *)cv);	382	PUSHs ((SV *)cv);
425		383
426	get_padlist (aTHX_ cv); /* this is a monster */	384	CvDEPTH (cv) = 0;
		385	get_padlist (cv);
427	}	386	}
428	}	387	}
429	#ifdef CXt_FORMAT
430	else if (CxTYPE(cx) == CXt_FORMAT)
431	{
432	/* I never used formats, so how should I know how these are implemented? */
433	/* my bold guess is as a simple, plain sub... */
434	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435	}
436	#endif
437	}	388	}
438		389
439	if (top_si->si_type == PERLSI_MAIN)	390	if (top_si->si_type == PERLSI_MAIN)
440	break;	391	break;
441		392
…		…
445	}	396	}
446		397
447	PUTBACK;	398	PUTBACK;
448	}	399	}
449		400
450	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	401	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
451	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	402	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
452	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	403	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		404	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
453		405
454	c->dowarn = PL_dowarn;	406	#define VAR(name,type)c->name = PL_ ## name;
455	c->in_eval = PL_in_eval;	407	# include "state.h"
456		408	#undef VAR
457	c->curstackinfo = PL_curstackinfo;
458	c->curstack = PL_curstack;
459	c->mainstack = PL_mainstack;
460	c->stack_sp = PL_stack_sp;
461	c->op = PL_op;
462	c->curpad = PL_curpad;
463	c->comppad = PL_comppad;
464	c->compcv = PL_compcv;
465	c->stack_base = PL_stack_base;
466	c->stack_max = PL_stack_max;
467	c->tmps_stack = PL_tmps_stack;
468	c->tmps_floor = PL_tmps_floor;
469	c->tmps_ix = PL_tmps_ix;
470	c->tmps_max = PL_tmps_max;
471	c->markstack = PL_markstack;
472	c->markstack_ptr = PL_markstack_ptr;
473	c->markstack_max = PL_markstack_max;
474	c->scopestack = PL_scopestack;
475	c->scopestack_ix = PL_scopestack_ix;
476	c->scopestack_max = PL_scopestack_max;
477	c->savestack = PL_savestack;
478	c->savestack_ix = PL_savestack_ix;
479	c->savestack_max = PL_savestack_max;
480	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;
483	c->curpm = PL_curpm;
484	c->curcop = PL_curcop;
485	c->top_env = PL_top_env;
486	}	409	}
487		410
488	/*	411	/*
489	* allocate various perl stacks. This is an exact copy	412	* allocate various perl stacks. This is an exact copy
490	* of perl.c:init_stacks, except that it uses less memory	413	* of perl.c:init_stacks, except that it uses less memory
491	* on the (sometimes correct) assumption that coroutines do	414	* on the (sometimes correct) assumption that coroutines do
492	* not usually need a lot of stackspace.	415	* not usually need a lot of stackspace.
493	*/	416	*/
494	STATIC void	417	#if PREFER_PERL_FUNCTIONS
		418	# define coro_init_stacks init_stacks
		419	#else
		420	static void
495	coro_init_stacks (pTHX)	421	coro_init_stacks ()
496	{	422	{
497	LOCK;
498
499	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
500	PL_curstackinfo->si_type = PERLSI_MAIN;	424	PL_curstackinfo->si_type = PERLSI_MAIN;
501	PL_curstack = PL_curstackinfo->si_stack;	425	PL_curstack = PL_curstackinfo->si_stack;
502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503		427
504	PL_stack_base = AvARRAY(PL_curstack);	428	PL_stack_base = AvARRAY(PL_curstack);
505	PL_stack_sp = PL_stack_base;	429	PL_stack_sp = PL_stack_base;
506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
507		431
508	New(50,PL_tmps_stack,96,SV*);	432	New(50,PL_tmps_stack,128,SV*);
509	PL_tmps_floor = -1;	433	PL_tmps_floor = -1;
510	PL_tmps_ix = -1;	434	PL_tmps_ix = -1;
511	PL_tmps_max = 96;	435	PL_tmps_max = 128;
512		436
513	New(54,PL_markstack,16,I32);	437	New(54,PL_markstack,32,I32);
514	PL_markstack_ptr = PL_markstack;	438	PL_markstack_ptr = PL_markstack;
515	PL_markstack_max = PL_markstack + 16;	439	PL_markstack_max = PL_markstack + 32;
516		440
517	#ifdef SET_MARK_OFFSET	441	#ifdef SET_MARK_OFFSET
518	SET_MARK_OFFSET;	442	SET_MARK_OFFSET;
519	#endif	443	#endif
520		444
521	New(54,PL_scopestack,16,I32);	445	New(54,PL_scopestack,32,I32);
522	PL_scopestack_ix = 0;	446	PL_scopestack_ix = 0;
523	PL_scopestack_max = 16;	447	PL_scopestack_max = 32;
524		448
525	New(54,PL_savestack,96,ANY);	449	New(54,PL_savestack,64,ANY);
526	PL_savestack_ix = 0;	450	PL_savestack_ix = 0;
527	PL_savestack_max = 96;	451	PL_savestack_max = 64;
528		452
		453	#if !PERL_VERSION_ATLEAST (5,9,0)
529	New(54,PL_retstack,8,OP*);	454	New(54,PL_retstack,16,OP*);
530	PL_retstack_ix = 0;	455	PL_retstack_ix = 0;
531	PL_retstack_max = 8;	456	PL_retstack_max = 16;
532		457	#endif
533	UNLOCK;
534	}	458	}
		459	#endif
535		460
536	/*	461	/*
537	* destroy the stacks, the callchain etc...	462	* destroy the stacks, the callchain etc...
538	*/	463	*/
539	STATIC void	464	static void
540	destroy_stacks(pTHX)	465	coro_destroy_stacks ()
541	{	466	{
542	if (!IN_DESTRUCT)	467	if (!IN_DESTRUCT)
543	{	468	{
544	/* is this ugly, I ask? */	469	/* restore all saved variables and stuff */
545	LEAVE_SCOPE (0);	470	LEAVE_SCOPE (0);
		471	assert (PL_tmps_floor == -1);
546		472
547	/* sure it is, but more important: is it correct?? :/ */	473	/* free all temporaries */
548	FREETMPS;	474	FREETMPS;
		475	assert (PL_tmps_ix == -1);
549		476
		477	/* unwind all extra stacks */
550	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	478	POPSTACK_TO (PL_mainstack);
		479
		480	/* unwind main stack */
		481	dounwind (-1);
551	}	482	}
552		483
553	while (PL_curstackinfo->si_next)	484	while (PL_curstackinfo->si_next)
554	PL_curstackinfo = PL_curstackinfo->si_next;	485	PL_curstackinfo = PL_curstackinfo->si_next;
555		486
556	while (PL_curstackinfo)	487	while (PL_curstackinfo)
557	{	488	{
558	PERL_SI *p = PL_curstackinfo->si_prev;	489	PERL_SI *p = PL_curstackinfo->si_prev;
559		490
560	{ /*D*//*remove*/
561	dSP;
562	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
563	PUTBACK; /* possibly superfluous */
564	}
565
566	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
567	{
568	dounwind (-1);/*D*//*remove*/
569	SvREFCNT_dec (PL_curstackinfo->si_stack);	492	SvREFCNT_dec (PL_curstackinfo->si_stack);
570	}
571		493
572	Safefree (PL_curstackinfo->si_cxstack);	494	Safefree (PL_curstackinfo->si_cxstack);
573	Safefree (PL_curstackinfo);	495	Safefree (PL_curstackinfo);
574	PL_curstackinfo = p;	496	PL_curstackinfo = p;
575	}	497	}
576		498
577	Safefree (PL_tmps_stack);	499	Safefree (PL_tmps_stack);
578	Safefree (PL_markstack);	500	Safefree (PL_markstack);
579	Safefree (PL_scopestack);	501	Safefree (PL_scopestack);
580	Safefree (PL_savestack);	502	Safefree (PL_savestack);
		503	#if !PERL_VERSION_ATLEAST (5,9,0)
581	Safefree (PL_retstack);	504	Safefree (PL_retstack);
582	}
583
584	static void
585	allocate_stack (Coro__State ctx, int alloc)
586	{
587	coro_stack *stack;
588
589	New (0, stack, 1, coro_stack);
590
591	stack->refcnt = 1;
592	stack->usecnt = 1;
593	stack->gencnt = ctx->gencnt = 0;
594
595	if (alloc)
596	{
597	#if HAVE_MMAP
598	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
599	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
600	if (stack->sptr == (void *)-1)
601	#endif	505	#endif
602	{
603	/*FIXME*//*D*//* reasonable stack size! */
604	stack->ssize = - (STACKSIZE * sizeof (long));
605	New (0, stack->sptr, STACKSIZE, long);
606	}
607	}
608	else
609	stack->sptr = 0;
610
611	ctx->stack = stack;
612	}	506	}
613		507
614	static void	508	static void
615	deallocate_stack (Coro__State ctx)	509	setup_coro (struct coro *coro)
616	{
617	coro_stack *stack = ctx->stack;
618
619	ctx->stack = 0;
620
621	if (stack)
622	{
623	if (!--stack->refcnt)
624	{
625	#ifdef HAVE_MMAP
626	if (stack->ssize > 0 && stack->sptr)
627	munmap (stack->sptr, stack->ssize);
628	else
629	#endif
630	Safefree (stack->sptr);
631
632	Safefree (stack);
633	}
634	else if (ctx->gencnt == stack->gencnt)
635	--stack->usecnt;
636	}
637	}
638
639	static void
640	setup_coro (void *arg)
641	{	510	{
642	/*	511	/*
643	* emulate part of the perl startup here.	512	* emulate part of the perl startup here.
644	*/	513	*/
645	dTHX;	514
		515	coro_init_stacks ();
		516
		517	PL_curcop = &PL_compiling;
		518	PL_in_eval = EVAL_NULL;
		519	PL_curpm = 0;
		520	PL_localizing = 0;
		521	PL_dirty = 0;
		522	PL_restartop = 0;
		523
		524	{
		525	dSP;
		526	LOGOP myop;
		527
		528	SvREFCNT_dec (GvAV (PL_defgv));
		529	GvAV (PL_defgv) = coro->args; coro->args = 0;
		530
		531	Zero (&myop, 1, LOGOP);
		532	myop.op_next = Nullop;
		533	myop.op_flags = OPf_WANT_VOID;
		534
		535	PUSHMARK (SP);
		536	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		537	PUTBACK;
		538	PL_op = (OP *)&myop;
		539	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		540	SPAGAIN;
		541	}
		542
		543	ENTER; /* necessary e.g. for dounwind */
		544	}
		545
		546	static void
		547	free_coro_mortal ()
		548	{
		549	if (coro_mortal)
		550	{
		551	SvREFCNT_dec (coro_mortal);
		552	coro_mortal = 0;
		553	}
		554	}
		555
		556	/* inject a fake call to Coro::State::_cctx_init into the execution */
		557	static void NOINLINE
		558	prepare_cctx (coro_cctx *cctx)
		559	{
646	dSP;	560	dSP;
647	Coro__State ctx = (Coro__State)arg;	561	LOGOP myop;
648	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
649		562
650	coro_init_stacks (aTHX);	563	Zero (&myop, 1, LOGOP);
651	/*PL_curcop = 0;*/	564	myop.op_next = PL_op;
652	/*PL_in_eval = PL_in_eval;*/ /* inherit */	565	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
653	SvREFCNT_dec (GvAV (PL_defgv));
654	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
655		566
		567	PUSHMARK (SP);
		568	EXTEND (SP, 2);
		569	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		570	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		571	PUTBACK;
		572	PL_op = (OP *)&myop;
		573	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
656	SPAGAIN;	574	SPAGAIN;
657
658	if (ctx->stack)
659	{
660	ctx->cursp = 0;
661
662	PUSHMARK(SP);
663	PUTBACK;
664	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
665
666	if (SvTRUE (ERRSV))
667	croak (NULL);
668	else
669	croak ("FATAL: CCTXT coroutine returned!");
670	}
671	else
672	{
673	UNOP myop;
674
675	PL_op = (OP *)&myop;
676
677	Zero(&myop, 1, UNOP);
678	myop.op_next = Nullop;
679	myop.op_flags = OPf_WANT_VOID;
680
681	PUSHMARK(SP);
682	XPUSHs (sub_init);
683	/*
684	* the next line is slightly wrong, as PL_op->op_next
685	* is actually being executed so we skip the first op.
686	* that doesn't matter, though, since it is only
687	* pp_nextstate and we never return...
688	* ah yes, and I don't care anyways ;)
689	*/
690	PUTBACK;
691	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
692	SPAGAIN;
693
694	ENTER; /* necessary e.g. for dounwind */
695	}
696	}	575	}
697		576
698	static void	577	static void
699	continue_coro (void *arg)	578	coro_run (void *arg)
700	{	579	{
		580	/* coro_run is the alternative tail of transfer(), so unlock here. */
		581	UNLOCK;
		582
701	/*	583	/*
702	* this is a _very_ stripped down perl interpreter ;)	584	* this is a _very_ stripped down perl interpreter ;)
703	*/	585	*/
704	dTHX;
705	Coro__State ctx = (Coro__State)arg;
706	JMPENV coro_start_env;
707
708	PL_top_env = &ctx->start_env;	586	PL_top_env = &PL_start_env;
709		587
710	ctx->cursp = 0;	588	/* inject call to cctx_init */
711	PL_op = PL_op->op_next;	589	prepare_cctx ((coro_cctx *)arg);
712	CALLRUNOPS(aTHX);
713		590
		591	/* somebody will hit me for both perl_run and PL_restartop */
		592	PL_restartop = PL_op;
		593	perl_run (PL_curinterp);
		594
		595	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
714	abort ();	596	abort ();
715	}	597	}
716		598
717	STATIC void	599	static coro_cctx *
		600	cctx_new ()
		601	{
		602	coro_cctx *cctx;
		603
		604	++cctx_count;
		605
		606	Newz (0, cctx, 1, coro_cctx);
		607
		608	#if HAVE_MMAP
		609
		610	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		611	/* mmap supposedly does allocate-on-write for us */
		612	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		613
		614	if (cctx->sptr == (void *)-1)
		615	{
		616	perror ("FATAL: unable to mmap stack for coroutine");
		617	_exit (EXIT_FAILURE);
		618	}
		619
		620	# if STACKGUARD
		621	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		622	# endif
		623
		624	#else
		625
		626	cctx->ssize = STACKSIZE * (long)sizeof (long);
		627	New (0, cctx->sptr, STACKSIZE, long);
		628
		629	if (!cctx->sptr)
		630	{
		631	perror ("FATAL: unable to malloc stack for coroutine");
		632	_exit (EXIT_FAILURE);
		633	}
		634
		635	#endif
		636
		637	#if USE_VALGRIND
		638	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		639	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		640	cctx->ssize + (char *)cctx->sptr
		641	);
		642	#endif
		643
		644	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		645
		646	return cctx;
		647	}
		648
		649	static void
		650	cctx_destroy (coro_cctx *cctx)
		651	{
		652	if (!cctx)
		653	return;
		654
		655	--cctx_count;
		656
		657	#if USE_VALGRIND
		658	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		659	#endif
		660
		661	#if HAVE_MMAP
		662	munmap (cctx->sptr, cctx->ssize);
		663	#else
		664	Safefree (cctx->sptr);
		665	#endif
		666
		667	Safefree (cctx);
		668	}
		669
		670	static coro_cctx *
		671	cctx_get ()
		672	{
		673	coro_cctx *cctx;
		674
		675	if (cctx_first)
		676	{
		677	cctx = cctx_first;
		678	cctx_first = cctx->next;
		679	--cctx_idle;
		680	}
		681	else
		682	{
		683	cctx = cctx_new ();
		684	PL_op = PL_op->op_next;
		685	}
		686
		687	return cctx;
		688	}
		689
		690	static void
		691	cctx_put (coro_cctx *cctx)
		692	{
		693	/* free another cctx if overlimit */
		694	if (cctx_idle >= MAX_IDLE_CCTX)
		695	{
		696	coro_cctx *first = cctx_first;
		697	cctx_first = first->next;
		698	--cctx_idle;
		699
		700	assert (!first->inuse);
		701	cctx_destroy (first);
		702	}
		703
		704	++cctx_idle;
		705	cctx->next = cctx_first;
		706	cctx_first = cctx;
		707	}
		708
		709	/* never call directly, always through the coro_state_transfer global variable */
		710	static void NOINLINE
718	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	711	transfer (struct coro *prev, struct coro *next)
719	{	712	{
720	dSTACKLEVEL;	713	dSTACKLEVEL;
721		714
		715	/* sometimes transfer is only called to set idle_sp */
		716	if (!next)
		717	{
		718	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		719	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		720	}
722	if (prev != next)	721	else if (prev != next)
723	{	722	{
724	if (next->mainstack)	723	coro_cctx *prev__cctx;
		724
		725	if (prev->flags & CF_NEW)
725	{	726	{
726	LOCK;	727	/* create a new empty context */
727	SAVE (prev, flags);	728	Newz (0, prev->cctx, 1, coro_cctx);
728	LOAD (next);	729	prev->cctx->inuse = 1;
729	UNLOCK;	730	prev->flags &= ~CF_NEW;
730		731	prev->flags |= CF_RUNNING;
731	/* mark this state as in-use */
732	next->mainstack = 0;
733	next->tmps_ix = -2;
734
735	/* stacklevel changed? if yes, grab the stack for us! */
736	if (flags & TRANSFER_SAVE_CCTXT)
737	{
738	if (!prev->stack)
739	allocate_stack (prev, 0);
740	else if (prev->cursp != stacklevel
741	&& prev->stack->usecnt > 1)
742	{
743	prev->gencnt = ++prev->stack->gencnt;
744	prev->stack->usecnt = 1;
745	}
746
747	/* has our stack been invalidated? */
748	if (next->stack && next->stack->gencnt != next->gencnt)
749	{
750	deallocate_stack (next);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	continue_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	}
756
757	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
758	prev->cursp = stacklevel;
759	/* don't add any code here */
760	}
761	else
762	next->cursp = stacklevel;
763	}	732	}
764	else if (next->tmps_ix == -2)	733
765	croak ("tried to transfer to running coroutine");	734	/*TODO: must not croak here */
		735	if (!prev->flags & CF_RUNNING)
		736	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		737
		738	if (next->flags & CF_RUNNING)
		739	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		740
		741	if (next->flags & CF_DESTROYED)
		742	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		743
		744	prev->flags &= ~CF_RUNNING;
		745	next->flags |= CF_RUNNING;
		746
		747	LOCK;
		748
		749	if (next->flags & CF_NEW)
		750	{
		751	/* need to start coroutine */
		752	next->flags &= ~CF_NEW;
		753	/* first get rid of the old state */
		754	save_perl (prev);
		755	/* setup coroutine call */
		756	setup_coro (next);
		757	/* need a new stack */
		758	assert (!next->cctx);
		759	}
766	else	760	else
767	{	761	{
768	LOCK;	762	/* coroutine already started */
769	SAVE (prev, -1); /* first get rid of the old state */	763	save_perl (prev);
770	UNLOCK;	764	load_perl (next);
771
772	if (flags & TRANSFER_SAVE_CCTXT)
773	{
774	if (!prev->stack)
775	allocate_stack (prev, 0);
776
777	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
778	{
779	PL_top_env = &next->start_env;
780
781	setup_coro (next);
782	next->cursp = stacklevel;
783
784	prev->stack->refcnt++;
785	prev->stack->usecnt++;
786	next->stack = prev->stack;
787	next->gencnt = prev->gencnt;
788	}
789	else
790	{
791	assert (!next->stack);
792	allocate_stack (next, 1);
793	coro_create (&(next->stack->cctx),
794	setup_coro, (void *)next,
795	next->stack->sptr, labs (next->stack->ssize));
796	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
797	prev->cursp = stacklevel;
798	/* don't add any code here */
799	}
800	}
801	else
802	{
803	setup_coro (next);
804	next->cursp = stacklevel;
805	}
806	}	765	}
807	}
808		766
809	LOCK;	767	prev__cctx = prev->cctx;
810	if (coro_mortal)	768
811	{	769	/* possibly "free" the cctx */
812	SvREFCNT_dec (coro_mortal);	770	if (prev__cctx->idle_sp == STACKLEVEL)
		771	{
		772	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		773	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		774
		775	prev->cctx = 0;
		776
		777	cctx_put (prev__cctx);
		778	prev__cctx->inuse = 0;
		779	}
		780
		781	if (!next->cctx)
		782	{
		783	next->cctx = cctx_get ();
		784	assert (!next->cctx->inuse);
		785	next->cctx->inuse = 1;
		786	}
		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
813	coro_mortal = 0;	795	free_coro_mortal ();
814	}
815	UNLOCK;	796	UNLOCK;
		797	}
816	}	798	}
817		799
818	#define SV_CORO(sv,func) \	800	struct transfer_args
819	do { \	801	{
820	if (SvROK (sv)) \	802	struct coro *prev, *next;
821	sv = SvRV (sv); \	803	};
822	\
823	if (SvTYPE (sv) == SVt_PVHV) \
824	{ \
825	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
826	\
827	if (!he) \
828	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
829	\
830	(sv) = SvRV (HeVAL(he)); \
831	} \
832	\
833	/* must also be changed inside Coro::Cont::yield */ \
834	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
835	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
836	\
837	} while(0)
838		804
839	#define SvSTATE(sv) (struct coro *)SvIV (sv)	805	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
840		806
841	static void	807	static int
		808	coro_state_destroy (struct coro *coro)
		809	{
		810	if (coro->flags & CF_DESTROYED)
		811	return 0;
		812
		813	coro->flags |= CF_DESTROYED;
		814
		815	if (coro->mainstack && coro->mainstack != main_mainstack)
		816	{
		817	assert (!(coro->flags & CF_RUNNING));
		818
		819	struct coro temp;
		820	Zero (&temp, 1, struct coro);
		821	temp.save = CORO_SAVE_ALL;
		822
		823	if (coro->flags & CF_RUNNING)
		824	croak ("FATAL: tried to destroy currently running coroutine");
		825
		826	save_perl (&temp);
		827	load_perl (coro);
		828
		829	coro_destroy_stacks ();
		830
		831	load_perl (&temp); /* this will get rid of defsv etc.. */
		832
		833	coro->mainstack = 0;
		834	}
		835
		836	cctx_destroy (coro->cctx);
		837	SvREFCNT_dec (coro->args);
		838
		839	return 1;
		840	}
		841
		842	static int
		843	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		844	{
		845	struct coro *coro = (struct coro *)mg->mg_ptr;
		846	mg->mg_ptr = 0;
		847
		848	if (--coro->refcnt < 0)
		849	{
		850	coro_state_destroy (coro);
		851	Safefree (coro);
		852	}
		853
		854	return 0;
		855	}
		856
		857	static int
		858	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		859	{
		860	struct coro *coro = (struct coro *)mg->mg_ptr;
		861
		862	++coro->refcnt;
		863
		864	return 0;
		865	}
		866
		867	static MGVTBL coro_state_vtbl = {
		868	0, 0, 0, 0,
		869	coro_state_free,
		870	0,
		871	#ifdef MGf_DUP
		872	coro_state_dup,
		873	#else
		874	# define MGf_DUP 0
		875	#endif
		876	};
		877
		878	static struct coro *
		879	SvSTATE (SV *coro)
		880	{
		881	HV *stash;
		882	MAGIC *mg;
		883
		884	if (SvROK (coro))
		885	coro = SvRV (coro);
		886
		887	stash = SvSTASH (coro);
		888	if (stash != coro_stash && stash != coro_state_stash)
		889	{
		890	/* very slow, but rare, check */
		891	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		892	croak ("Coro::State object required");
		893	}
		894
		895	mg = SvMAGIC (coro);
		896	assert (mg->mg_type == PERL_MAGIC_ext);
		897	return (struct coro *)mg->mg_ptr;
		898	}
		899
		900	static void
		901	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		902	{
		903	ta->prev = SvSTATE (prev_sv);
		904	ta->next = SvSTATE (next_sv);
		905	}
		906
		907	static void
842	api_transfer(pTHX_ SV *prev, SV *next, int flags)	908	api_transfer (SV *prev_sv, SV *next_sv)
843	{	909	{
844	SV_CORO (prev, "Coro::transfer");	910	struct transfer_args ta;
845	SV_CORO (next, "Coro::transfer");
846		911
847	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	912	prepare_transfer (&ta, prev_sv, next_sv);
		913	TRANSFER (ta);
		914	}
		915
		916	static int
		917	api_save (SV *coro_sv, int new_save)
		918	{
		919	struct coro *coro = SvSTATE (coro_sv);
		920	int old_save = coro->save;
		921
		922	if (new_save >= 0)
		923	coro->save = new_save;
		924
		925	return old_save;
848	}	926	}
849		927
850	/** Coro ********************************************************************/	928	/** Coro ********************************************************************/
851		929
852	#define PRIO_MAX 3	930	#define PRIO_MAX 3
…		…
855	#define PRIO_LOW -1	933	#define PRIO_LOW -1
856	#define PRIO_IDLE -3	934	#define PRIO_IDLE -3
857	#define PRIO_MIN -4	935	#define PRIO_MIN -4
858		936
859	/* for Coro.pm */	937	/* for Coro.pm */
860	static GV *coro_current, *coro_idle;	938	static SV *coro_current;
861	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	939	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
862	static int coro_nready;	940	static int coro_nready;
863		941
864	static void	942	static void
865	coro_enq (pTHX_ SV *sv)	943	coro_enq (SV *coro_sv)
866	{	944	{
867	if (SvTYPE (sv) == SVt_PVHV)
868	{
869	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
870	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
871
872	prio = prio > PRIO_MAX ? PRIO_MAX
873	: prio < PRIO_MIN ? PRIO_MIN
874	: prio;
875
876	av_push (coro_ready [prio - PRIO_MIN], sv);	945	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
877	coro_nready++;	946	coro_nready++;
878
879	return;
880	}
881
882	croak ("Coro::ready tried to enqueue something that is not a coroutine");
883	}	947	}
884		948
885	static SV *	949	static SV *
886	coro_deq (pTHX_ int min_prio)	950	coro_deq (int min_prio)
887	{	951	{
888	int prio = PRIO_MAX - PRIO_MIN;	952	int prio = PRIO_MAX - PRIO_MIN;
889		953
890	min_prio -= PRIO_MIN;	954	min_prio -= PRIO_MIN;
891	if (min_prio < 0)	955	if (min_prio < 0)
892	min_prio = 0;	956	min_prio = 0;
893		957
894	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	958	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
895	if (av_len (coro_ready[prio]) >= 0)	959	if (AvFILLp (coro_ready [prio]) >= 0)
896	{	960	{
897	coro_nready--;	961	coro_nready--;
898	return av_shift (coro_ready[prio]);	962	return av_shift (coro_ready [prio]);
899	}	963	}
900		964
901	return 0;	965	return 0;
902	}	966	}
903		967
904	static void	968	static int
905	api_ready (SV *coro)	969	api_ready (SV *coro_sv)
906	{	970	{
907	dTHX;	971	struct coro *coro;
908		972
909	if (SvROK (coro))	973	if (SvROK (coro_sv))
910	coro = SvRV (coro);	974	coro_sv = SvRV (coro_sv);
		975
		976	coro = SvSTATE (coro_sv);
		977
		978	if (coro->flags & CF_READY)
		979	return 0;
		980
		981	coro->flags |= CF_READY;
911		982
912	LOCK;	983	LOCK;
913	coro_enq (aTHX_ SvREFCNT_inc (coro));	984	coro_enq (SvREFCNT_inc (coro_sv));
914	UNLOCK;	985	UNLOCK;
		986
		987	return 1;
		988	}
		989
		990	static int
		991	api_is_ready (SV *coro_sv)
		992	{
		993	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		994	}
		995
		996	static void
		997	prepare_schedule (struct transfer_args *ta)
		998	{
		999	SV *prev_sv, *next_sv;
		1000
		1001	for (;;)
		1002	{
		1003	LOCK;
		1004	next_sv = coro_deq (PRIO_MIN);
		1005	UNLOCK;
		1006
		1007	/* nothing to schedule: call the idle handler */
		1008	if (!next_sv)
		1009	{
		1010	dSP;
		1011
		1012	ENTER;
		1013	SAVETMPS;
		1014
		1015	PUSHMARK (SP);
		1016	PUTBACK;
		1017	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1018
		1019	FREETMPS;
		1020	LEAVE;
		1021	continue;
		1022	}
		1023
		1024	ta->next = SvSTATE (next_sv);
		1025
		1026	/* cannot transfer to destroyed coros, skip and look for next */
		1027	if (ta->next->flags & CF_DESTROYED)
		1028	{
		1029	SvREFCNT_dec (next_sv);
		1030	continue;
		1031	}
		1032
		1033	break;
		1034	}
		1035
		1036	/* free this only after the transfer */
		1037	prev_sv = SvRV (coro_current);
		1038	SvRV_set (coro_current, next_sv);
		1039	ta->prev = SvSTATE (prev_sv);
		1040
		1041	assert (ta->next->flags & CF_READY);
		1042	ta->next->flags &= ~CF_READY;
		1043
		1044	LOCK;
		1045	free_coro_mortal ();
		1046	coro_mortal = prev_sv;
		1047	UNLOCK;
		1048	}
		1049
		1050	static void
		1051	prepare_cede (struct transfer_args *ta)
		1052	{
		1053	api_ready (coro_current);
		1054	prepare_schedule (ta);
		1055	}
		1056
		1057	static int
		1058	prepare_cede_notself (struct transfer_args *ta)
		1059	{
		1060	if (coro_nready)
		1061	{
		1062	SV *prev = SvRV (coro_current);
		1063	prepare_schedule (ta);
		1064	api_ready (prev);
		1065	return 1;
		1066	}
		1067	else
		1068	return 0;
915	}	1069	}
916		1070
917	static void	1071	static void
918	api_schedule (void)	1072	api_schedule (void)
919	{	1073	{
920	dTHX;	1074	struct transfer_args ta;
921		1075
922	SV *prev, *next;	1076	prepare_schedule (&ta);
923		1077	TRANSFER (ta);
924	LOCK;
925
926	prev = SvRV (GvSV (coro_current));
927	next = coro_deq (aTHX_ PRIO_MIN);
928
929	if (!next)
930	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
931
932	/* free this only after the transfer */
933	coro_mortal = prev;
934	SV_CORO (prev, "Coro::schedule");
935
936	SvRV (GvSV (coro_current)) = next;
937
938	SV_CORO (next, "Coro::schedule");
939
940	UNLOCK;
941
942	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
943	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
944	}	1078	}
945		1079
946	static void	1080	static int
947	api_cede (void)	1081	api_cede (void)
948	{	1082	{
949	dTHX;	1083	struct transfer_args ta;
950		1084
951	LOCK;	1085	prepare_cede (&ta);
952	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
953	UNLOCK;
954		1086
955	api_schedule ();	1087	if (ta.prev != ta.next)
		1088	{
		1089	TRANSFER (ta);
		1090	return 1;
		1091	}
		1092	else
		1093	return 0;
		1094	}
		1095
		1096	static int
		1097	api_cede_notself (void)
		1098	{
		1099	struct transfer_args ta;
		1100
		1101	if (prepare_cede_notself (&ta))
		1102	{
		1103	TRANSFER (ta);
		1104	return 1;
		1105	}
		1106	else
		1107	return 0;
956	}	1108	}
957		1109
958	MODULE = Coro::State PACKAGE = Coro::State	1110	MODULE = Coro::State PACKAGE = Coro::State
959		1111
960	PROTOTYPES: ENABLE	1112	PROTOTYPES: DISABLE
961		1113
962	BOOT:	1114	BOOT:
963	{ /* {} necessary for stoopid perl-5.6.x */	1115	{
964	#ifdef USE_ITHREADS	1116	#ifdef USE_ITHREADS
965	MUTEX_INIT (&coro_mutex);	1117	MUTEX_INIT (&coro_mutex);
966	#endif	1118	#endif
		1119	BOOT_PAGESIZE;
967		1120
968	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
969	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
970	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1121	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971		1122
972	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1123	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
973	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
974	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1125	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1126	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
975	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1127	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
976		1128
977	main_mainstack = PL_mainstack;	1129	main_mainstack = PL_mainstack;
978		1130
979	coroapi.ver = CORO_API_VERSION;	1131	coroapi.ver = CORO_API_VERSION;
980	coroapi.transfer = api_transfer;	1132	coroapi.transfer = api_transfer;
981	}
982		1133
983	Coro::State	1134	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
984	_newprocess(args)	1135	}
985	SV * args	1136
986	PROTOTYPE: $	1137	SV *
		1138	new (char *klass, ...)
987	CODE:	1139	CODE:
988	Coro__State coro;	1140	{
		1141	struct coro *coro;
		1142	HV *hv;
		1143	int i;
989		1144
990	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
991	croak ("Coro::State::_newprocess expects an arrayref");
992
993	Newz (0, coro, 1, struct coro);	1145	Newz (0, coro, 1, struct coro);
		1146	coro->args = newAV ();
		1147	coro->save = CORO_SAVE_ALL;
		1148	coro->flags = CF_NEW;
994		1149
995	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1150	hv = newHV ();
996	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1151	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
997	/*coro->stack = 0;*/	1152	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
998		1153
999	/* same as JMPENV_BOOTSTRAP */	1154	for (i = 1; i < items; i++)
1000	/* we might be able to recycle start_env, but safe is safe */	1155	av_push (coro->args, newSVsv (ST (i)));
1001	/*Zero(&coro->start_env, 1, JMPENV);*/	1156	}
1002	coro->start_env.je_ret = -1;
1003	coro->start_env.je_mustcatch = TRUE;
1004
1005	RETVAL = coro;
1006	OUTPUT:	1157	OUTPUT:
1007	RETVAL	1158	RETVAL
1008		1159
		1160	int
		1161	save (SV *coro, int new_save = -1)
		1162	CODE:
		1163	RETVAL = api_save (coro, new_save);
		1164	OUTPUT:
		1165	RETVAL
		1166
1009	void	1167	void
1010	transfer(prev, next, flags)	1168	_set_stacklevel (...)
1011	SV *prev	1169	ALIAS:
1012	SV *next	1170	Coro::State::transfer = 1
1013	int flags	1171	Coro::schedule = 2
1014	PROTOTYPE: @	1172	Coro::cede = 3
		1173	Coro::cede_notself = 4
1015	CODE:	1174	CODE:
1016	PUTBACK;	1175	{
1017	SV_CORO (next, "Coro::transfer");	1176	struct transfer_args ta;
1018	SV_CORO (prev, "Coro::transfer");	1177
1019	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1178	switch (ix)
1020	SPAGAIN;	1179	{
		1180	case 0:
		1181	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1182	ta.next = 0;
		1183	break;
		1184
		1185	case 1:
		1186	if (items != 2)
		1187	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1188
		1189	prepare_transfer (&ta, ST (0), ST (1));
		1190	break;
		1191
		1192	case 2:
		1193	prepare_schedule (&ta);
		1194	break;
		1195
		1196	case 3:
		1197	prepare_cede (&ta);
		1198	break;
		1199
		1200	case 4:
		1201	if (!prepare_cede_notself (&ta))
		1202	XSRETURN_EMPTY;
		1203
		1204	break;
		1205	}
		1206
		1207	BARRIER;
		1208	TRANSFER (ta);
		1209	}
		1210
		1211	bool
		1212	_destroy (SV *coro_sv)
		1213	CODE:
		1214	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1215	OUTPUT:
		1216	RETVAL
1021		1217
1022	void	1218	void
1023	DESTROY(coro)
1024	Coro::State coro
1025	CODE:
1026
1027	if (coro->mainstack && coro->mainstack != main_mainstack)
1028	{
1029	struct coro temp;
1030
1031	PUTBACK;
1032	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1033	LOAD (aTHX_ coro);
1034	SPAGAIN;
1035
1036	destroy_stacks (aTHX);
1037
1038	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1039	SPAGAIN;
1040
1041	coro->mainstack = 0;
1042	}
1043
1044	deallocate_stack (coro);
1045	SvREFCNT_dec (coro->args);
1046	Safefree (coro);
1047
1048	void
1049	_exit(code)	1219	_exit (code)
1050	int code	1220	int code
1051	PROTOTYPE: $	1221	PROTOTYPE: $
1052	CODE:	1222	CODE:
1053	_exit (code);	1223	_exit (code);
1054		1224
1055	MODULE = Coro::State PACKAGE = Coro::Cont	1225	int
		1226	cctx_count ()
		1227	CODE:
		1228	RETVAL = cctx_count;
		1229	OUTPUT:
		1230	RETVAL
1056		1231
1057	# this is slightly dirty (should expose a c-level api)	1232	int
1058		1233	cctx_idle ()
1059	void	1234	CODE:
1060	yield(...)	1235	RETVAL = cctx_idle;
1061	PROTOTYPE: @	1236	OUTPUT:
1062	CODE:	1237	RETVAL
1063	SV *yieldstack;
1064	SV *sv;
1065	AV *defav = GvAV (PL_defgv);
1066	struct coro *prev, *next;
1067
1068	yieldstack = *hv_fetch (
1069	(HV *)SvRV (GvSV (coro_current)),
1070	"yieldstack", sizeof ("yieldstack") - 1,
1071	0
1072	);
1073
1074	/* set up @_ -- ugly */
1075	av_clear (defav);
1076	av_fill (defav, items - 1);
1077	while (items--)
1078	av_store (defav, items, SvREFCNT_inc (ST(items)));
1079
1080	sv = av_pop ((AV *)SvRV (yieldstack));
1081	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1082	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1083	SvREFCNT_dec (sv);
1084
1085	transfer (aTHX_ prev, next, 0);
1086		1238
1087	MODULE = Coro::State PACKAGE = Coro	1239	MODULE = Coro::State PACKAGE = Coro
1088		1240
1089	# this is slightly dirty (should expose a c-level api)
1090
1091	BOOT:	1241	BOOT:
1092	{	1242	{
1093	int i;	1243	int i;
		1244
1094	HV *stash = gv_stashpv ("Coro", TRUE);	1245	coro_stash = gv_stashpv ("Coro", TRUE);
1095		1246
1096	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1247	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1097	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1248	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1098	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1249	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1099	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1250	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1100	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1251	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1101	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1252	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1102		1253
1103	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1254	coro_current = get_sv ("Coro::current", FALSE);
1104	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1255	SvREADONLY_on (coro_current);
1105		1256
1106	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1257	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1107	coro_ready[i] = newAV ();	1258	coro_ready[i] = newAV ();
1108		1259
1109	{	1260	{
1110	SV *sv = perl_get_sv("Coro::API", 1);	1261	SV *sv = perl_get_sv("Coro::API", 1);
1111		1262
1112	coroapi.schedule = api_schedule;	1263	coroapi.schedule = api_schedule;
		1264	coroapi.save = api_save;
1113	coroapi.cede = api_cede;	1265	coroapi.cede = api_cede;
		1266	coroapi.cede_notself = api_cede_notself;
1114	coroapi.ready = api_ready;	1267	coroapi.ready = api_ready;
		1268	coroapi.is_ready = api_is_ready;
1115	coroapi.nready = &coro_nready;	1269	coroapi.nready = &coro_nready;
1116	coroapi.current = coro_current;	1270	coroapi.current = coro_current;
1117		1271
1118	GCoroAPI = &coroapi;	1272	GCoroAPI = &coroapi;
1119	sv_setiv(sv, (IV)&coroapi);	1273	sv_setiv (sv, (IV)&coroapi);
1120	SvREADONLY_on(sv);	1274	SvREADONLY_on (sv);
1121	}	1275	}
1122	}	1276	}
1123		1277
1124	#if !PERL_MICRO
1125
1126	void	1278	void
1127	ready(self)	1279	_set_current (SV *current)
1128	SV * self
1129	PROTOTYPE: $	1280	PROTOTYPE: $
1130	CODE:	1281	CODE:
1131	api_ready (self);	1282	SvREFCNT_dec (SvRV (coro_current));
1132		1283	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1133	#endif
1134		1284
1135	int	1285	int
		1286	prio (Coro::State coro, int newprio = 0)
		1287	ALIAS:
		1288	nice = 1
		1289	CODE:
		1290	{
		1291	RETVAL = coro->prio;
		1292
		1293	if (items > 1)
		1294	{
		1295	if (ix)
		1296	newprio = coro->prio - newprio;
		1297
		1298	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1299	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1300
		1301	coro->prio = newprio;
		1302	}
		1303	}
		1304	OUTPUT:
		1305	RETVAL
		1306
		1307	SV *
		1308	ready (SV *self)
		1309	PROTOTYPE: $
		1310	CODE:
		1311	RETVAL = boolSV (api_ready (self));
		1312	OUTPUT:
		1313	RETVAL
		1314
		1315	SV *
		1316	is_ready (SV *self)
		1317	PROTOTYPE: $
		1318	CODE:
		1319	RETVAL = boolSV (api_is_ready (self));
		1320	OUTPUT:
		1321	RETVAL
		1322
		1323	int
1136	nready(...)	1324	nready (...)
1137	PROTOTYPE:	1325	PROTOTYPE:
1138	CODE:	1326	CODE:
1139	RETVAL = coro_nready;	1327	RETVAL = coro_nready;
1140	OUTPUT:	1328	OUTPUT:
1141	RETVAL	1329	RETVAL
1142		1330
		1331	MODULE = Coro::State PACKAGE = Coro::AIO
		1332
		1333	SV *
		1334	_get_state ()
		1335	CODE:
		1336	{
		1337	struct io_state *data;
		1338
		1339	RETVAL = newSV (sizeof (struct io_state));
		1340	data = (struct io_state *)SvPVX (RETVAL);
		1341	SvCUR_set (RETVAL, sizeof (struct io_state));
		1342	SvPOK_only (RETVAL);
		1343
		1344	data->errorno = errno;
		1345	data->laststype = PL_laststype;
		1346	data->laststatval = PL_laststatval;
		1347	data->statcache = PL_statcache;
		1348	}
		1349	OUTPUT:
		1350	RETVAL
		1351
1143	void	1352	void
1144	schedule(...)	1353	_set_state (char *data_)
1145	PROTOTYPE:	1354	PROTOTYPE: $
1146	CODE:	1355	CODE:
1147	api_schedule ();	1356	{
		1357	struct io_state *data = (void *)data_;
1148		1358
1149	void	1359	errno = data->errorno;
1150	cede(...)	1360	PL_laststype = data->laststype;
1151	PROTOTYPE:	1361	PL_laststatval = data->laststatval;
1152	CODE:	1362	PL_statcache = data->statcache;
1153	api_cede ();	1363	}
1154		1364

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