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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.74 by root, Mon Oct 23 22:49:09 2006 UTC vs.
Revision 1.136 by root, Fri Jan 12 01:05:55 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	#if PERL_VERSION < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		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)
12	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
14	# endif	52	# endif
15	# ifndef call_sv	53	# ifndef call_sv
16	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
29	# endif	67	# endif
30	#endif	68	#endif
31		69
32	#include <errno.h>	70	/* 5.8.7 */
33	#include <signal.h>	71	#ifndef SvRV_set
34		72	# define SvRV_set(s,v) SvRV(s) = (v)
35	#ifdef HAVE_MMAP
36	# include <unistd.h>
37	# include <sys/mman.h>
38	# ifndef MAP_ANONYMOUS
39	# ifdef MAP_ANON
40	# define MAP_ANONYMOUS MAP_ANON
41	# else
42	# undef HAVE_MMAP
43	# endif
44	# endif	73	#endif
45	#endif
46		74
47	#define SUB_INIT "Coro::State::initialize"	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
48	#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
49		87
50	/* 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
51	* 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
52	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
54		93
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		95
57	#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))
58		105
59	#include "CoroAPI.h"	106	#include "CoroAPI.h"
60		107
61	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
…		…
65	#else	112	#else
66	# define LOCK (void)0	113	# define LOCK (void)0
67	# define UNLOCK (void)0	114	# define UNLOCK (void)0
68	#endif	115	#endif
69		116
		117	/* helper storage struct for Coro::AIO */
		118	struct io_state
		119	{
		120	int errorno;
		121	I32 laststype;
		122	int laststatval;
		123	Stat_t statcache;
		124	};
		125
70	static struct CoroAPI coroapi;	126	static struct CoroAPI coroapi;
71	static AV *main_mainstack; /* used to differentiate between $main and others */	127	static AV *main_mainstack; /* used to differentiate between $main and others */
72	static HV *coro_state_stash;	128	static HV *coro_state_stash, *coro_stash;
73	static SV *ucoro_state_sv;
74	static U32 ucoro_state_hash;
75	static SV *coro_mortal; /* will be freed after next transfer */	129	static SV *coro_mortal; /* will be freed after next transfer */
76		130
77	/* this is actually not only the c stack but also c registers etc... */	131	static struct coro_cctx *cctx_first;
		132	static int cctx_count, cctx_idle;
		133
		134	/* this is a structure representing a c-level coroutine */
78	typedef struct {	135	typedef struct coro_cctx {
79	int refcnt; /* pointer reference counter */	136	struct coro_cctx *next;
80	int usecnt; /* shared by how many coroutines */
81	int gencnt; /* generation counter */
82		137
83	coro_context cctx;	138	/* the stack */
84
85	void *sptr;	139	void *sptr;
86	long ssize; /* positive == mmap, otherwise malloc */	140	long ssize; /* positive == mmap, otherwise malloc */
87	} coro_stack;
88		141
		142	/* cpu state */
		143	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		144	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		145	JMPENV *top_env;
		146	coro_context cctx;
		147
		148	int inuse;
		149
		150	#if USE_VALGRIND
		151	int valgrind_id;
		152	#endif
		153	} coro_cctx;
		154
		155	enum {
		156	CF_RUNNING = 0x0001, /* coroutine is running */
		157	CF_READY = 0x0002, /* coroutine is ready */
		158	CF_NEW = 0x0004, /* has never been switched to */
		159	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		160	};
		161
		162	/* this is a structure representing a perl-level coroutine */
89	struct coro {	163	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	164	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;	165	coro_cctx *cctx;
92
93	/* the optional C context */
94	coro_stack *stack;
95	void *cursp;
96	int gencnt;
97
98	/* optionally saved, might be zero */
99	AV *defav;
100	SV *defsv;
101	SV *errsv;
102
103	/* saved global state not related to stacks */
104	U8 dowarn;
105	I32 in_eval;
106
107	/* the stacks and related info (callchain etc..) */
108	PERL_SI *curstackinfo;
109	AV *curstack;
110	AV *mainstack;
111	SV **stack_sp;
112	OP *op;
113	SV **curpad;
114	AV *comppad;
115	CV *compcv;
116	SV **stack_base;
117	SV **stack_max;
118	SV **tmps_stack;
119	I32 tmps_floor;
120	I32 tmps_ix;
121	I32 tmps_max;
122	I32 *markstack;
123	I32 *markstack_ptr;
124	I32 *markstack_max;
125	I32 *scopestack;
126	I32 scopestack_ix;
127	I32 scopestack_max;
128	ANY *savestack;
129	I32 savestack_ix;
130	I32 savestack_max;
131	OP **retstack;
132	I32 retstack_ix;
133	I32 retstack_max;
134	PMOP *curpm;
135	COP *curcop;
136	JMPENV *top_env;
137		166
138	/* data associated with this coroutine (initial args) */	167	/* data associated with this coroutine (initial args) */
139	AV *args;	168	AV *args;
		169	int refcnt;
		170	int save; /* CORO_SAVE flags */
		171	int flags; /* CF_ flags */
		172
		173	/* optionally saved, might be zero */
		174	AV *defav; /* @_ */
		175	SV *defsv; /* $_ */
		176	SV *errsv; /* $@ */
		177	SV *irssv; /* $/ */
		178	SV *irssv_sv; /* real $/ cache */
		179
		180	#define VAR(name,type) type name;
		181	# include "state.h"
		182	#undef VAR
		183
		184	/* coro process data */
		185	int prio;
140	};	186	};
141		187
142	typedef struct coro *Coro__State;	188	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	189	typedef struct coro *Coro__State_or_hashref;
144		190
145	/* mostly copied from op.c:cv_clone2 */	191	static AV *
146	STATIC AV *	192	coro_clone_padlist (CV *cv)
147	clone_padlist (pTHX_ AV *protopadlist)
148	{	193	{
149	AV *av;	194	AV *padlist = CvPADLIST (cv);
150	I32 ix;
151	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
152	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
153	SV **pname = AvARRAY (protopad_name);
154	SV **ppad = AvARRAY (protopad);
155	I32 fname = AvFILLp (protopad_name);
156	I32 fpad = AvFILLp (protopad);
157	AV *newpadlist, *newpad_name, *newpad;	195	AV *newpadlist, *newpad;
158	SV **npad;
159
160	newpad_name = newAV ();
161	for (ix = fname; ix >= 0; ix--)
162	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164	newpad = newAV ();
165	av_fill (newpad, AvFILLp (protopad));
166	npad = AvARRAY (newpad);
167		196
168	newpadlist = newAV ();	197	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	198	AvREAL_off (newpadlist);
170	av_store (newpadlist, 0, (SV *) newpad_name);	199	#if PERL_VERSION_ATLEAST (5,9,0)
		200	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		201	#else
		202	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		203	#endif
		204	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		205	--AvFILLp (padlist);
		206
		207	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171	av_store (newpadlist, 1, (SV *) newpad);	208	av_store (newpadlist, 1, (SV *)newpad);
172
173	av = newAV (); /* will be @_ */
174	av_extend (av, 0);
175	av_store (newpad, 0, (SV *) av);
176	AvREIFY_on (av);
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char *name = SvPVX (namesv); /* XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV *kid = cv_clone((CV*)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		209
242	return newpadlist;	210	return newpadlist;
243	}	211	}
244		212
245	STATIC void	213	static void
246	free_padlist (pTHX_ AV *padlist)	214	free_padlist (AV *padlist)
247	{	215	{
248	/* may be during global destruction */	216	/* may be during global destruction */
249	if (SvREFCNT (padlist))	217	if (SvREFCNT (padlist))
250	{	218	{
251	I32 i = AvFILLp (padlist);	219	I32 i = AvFILLp (padlist);
…		…
264		232
265	SvREFCNT_dec ((SV*)padlist);	233	SvREFCNT_dec ((SV*)padlist);
266	}	234	}
267	}	235	}
268		236
269	STATIC int	237	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	238	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	239	{
272	AV *padlist;	240	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	241	AV *av = (AV *)mg->mg_obj;
274		242
275	/* casting is fun. */	243	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	244	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	245	free_padlist (padlist);
278		246
279	SvREFCNT_dec (av);	247	SvREFCNT_dec (av);
		248
		249	return 0;
280	}	250	}
281		251
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	252	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		253
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	254	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		255
		256	#define CORO_MAGIC(cv) \
		257	SvMAGIC (cv) \
		258	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		259	? SvMAGIC (cv) \
		260	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		261	: 0
		262
286	/* the next two functions merely cache the padlists */	263	/* the next two functions merely cache the padlists */
287	STATIC void	264	static void
288	get_padlist (pTHX_ CV *cv)	265	get_padlist (CV *cv)
289	{	266	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	267	MAGIC *mg = CORO_MAGIC (cv);
		268	AV *av;
291		269
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	270	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	271	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294	else	272	else
		273	{
		274	#if PREFER_PERL_FUNCTIONS
		275	/* this is probably cleaner, but also slower? */
		276	CV *cp = Perl_cv_clone (cv);
		277	CvPADLIST (cv) = CvPADLIST (cp);
		278	CvPADLIST (cp) = 0;
		279	SvREFCNT_dec (cp);
		280	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	281	CvPADLIST (cv) = coro_clone_padlist (cv);
		282	#endif
		283	}
296	}	284	}
297		285
298	STATIC void	286	static void
299	put_padlist (pTHX_ CV *cv)	287	put_padlist (CV *cv)
300	{	288	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	289	MAGIC *mg = CORO_MAGIC (cv);
		290	AV *av;
302		291
303	if (!mg)	292	if (!mg)
304	{	293	{
305	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	294	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307	mg->mg_virtual = &vtbl_coro;	296	mg->mg_virtual = &vtbl_coro;
308	mg->mg_obj = (SV *)newAV ();	297	mg->mg_obj = (SV *)newAV ();
309	}	298	}
310		299
311	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	300	av = (AV *)mg->mg_obj;
		301
		302	if (AvFILLp (av) >= AvMAX (av))
		303	av_extend (av, AvMAX (av) + 1);
		304
		305	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
312	}	306	}
313		307
314	#define SB do {	308	#define SB do {
315	#define SE } while (0)	309	#define SE } while (0)
316		310
317	#define LOAD(state) load_state(aTHX_ (state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
319
320	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	311	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
321		312
322	static void	313	static void
323	load_state(pTHX_ Coro__State c)	314	load_perl (Coro__State c)
324	{	315	{
325	PL_dowarn = c->dowarn;	316	#define VAR(name,type) PL_ ## name = c->name;
326	PL_in_eval = c->in_eval;	317	# include "state.h"
327		318	#undef VAR
328	PL_curstackinfo = c->curstackinfo;
329	PL_curstack = c->curstack;
330	PL_mainstack = c->mainstack;
331	PL_stack_sp = c->stack_sp;
332	PL_op = c->op;
333	PL_curpad = c->curpad;
334	PL_comppad = c->comppad;
335	PL_compcv = c->compcv;
336	PL_stack_base = c->stack_base;
337	PL_stack_max = c->stack_max;
338	PL_tmps_stack = c->tmps_stack;
339	PL_tmps_floor = c->tmps_floor;
340	PL_tmps_ix = c->tmps_ix;
341	PL_tmps_max = c->tmps_max;
342	PL_markstack = c->markstack;
343	PL_markstack_ptr = c->markstack_ptr;
344	PL_markstack_max = c->markstack_max;
345	PL_scopestack = c->scopestack;
346	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;
351	#if PERL_VERSION < 9
352	PL_retstack = c->retstack;
353	PL_retstack_ix = c->retstack_ix;
354	PL_retstack_max = c->retstack_max;
355	#endif
356	PL_curpm = c->curpm;
357	PL_curcop = c->curcop;
358	PL_top_env = c->top_env;
359		319
360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	320	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	321	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	322	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		323	if (c->irssv)
		324	{
		325	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		326	SvREFCNT_dec (c->irssv);
		327	else
		328	{
		329	REPLACE_SV (PL_rs, c->irssv);
		330	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		331	sv_setsv (c->irssv_sv, PL_rs);
		332	}
		333	}
363		334
364	{	335	{
365	dSP;	336	dSP;
366	CV *cv;	337	CV *cv;
367		338
368	/* now do the ugly restore mess */	339	/* now do the ugly restore mess */
369	while ((cv = (CV *)POPs))	340	while ((cv = (CV *)POPs))
370	{	341	{
371	AV *padlist = (AV *)POPs;
372
373	if (padlist)
374	{
375	put_padlist (aTHX_ cv); /* mark this padlist as available */	342	put_padlist (cv); /* mark this padlist as available */
376	CvPADLIST(cv) = padlist;	343	CvDEPTH (cv) = PTR2IV (POPs);
377	}	344	CvPADLIST (cv) = (AV *)POPs;
378
379	++CvDEPTH(cv);
380	}	345	}
381		346
382	PUTBACK;	347	PUTBACK;
383	}	348	}
384	}	349	}
385		350
386	static void	351	static void
387	save_state(pTHX_ Coro__State c, int flags)	352	save_perl (Coro__State c)
388	{	353	{
389	{	354	{
390	dSP;	355	dSP;
391	I32 cxix = cxstack_ix;	356	I32 cxix = cxstack_ix;
392	PERL_CONTEXT *ccstk = cxstack;	357	PERL_CONTEXT *ccstk = cxstack;
…		…
395	/*	360	/*
396	* the worst thing you can imagine happens first - we have to save	361	* the worst thing you can imagine happens first - we have to save
397	* (and reinitialize) all cv's in the whole callchain :(	362	* (and reinitialize) all cv's in the whole callchain :(
398	*/	363	*/
399		364
		365	EXTEND (SP, 3 + 1);
400	PUSHs (Nullsv);	366	PUSHs (Nullsv);
401	/* this loop was inspired by pp_caller */	367	/* this loop was inspired by pp_caller */
402	for (;;)	368	for (;;)
403	{	369	{
404	while (cxix >= 0)	370	while (cxix >= 0)
405	{	371	{
406	PERL_CONTEXT *cx = &ccstk[cxix--];	372	PERL_CONTEXT *cx = &ccstk[cxix--];
407		373
408	if (CxTYPE(cx) == CXt_SUB)	374	if (CxTYPE (cx) == CXt_SUB)
409	{	375	{
410	CV *cv = cx->blk_sub.cv;	376	CV *cv = cx->blk_sub.cv;
		377
411	if (CvDEPTH(cv))	378	if (CvDEPTH (cv))
412	{	379	{
413	EXTEND (SP, CvDEPTH(cv)*2);	380	EXTEND (SP, 3);
414
415	while (--CvDEPTH(cv))
416	{
417	/* this tells the restore code to increment CvDEPTH */
418	PUSHs (Nullsv);
419	PUSHs ((SV *)cv);
420	}
421
422	PUSHs ((SV *)CvPADLIST(cv));	381	PUSHs ((SV *)CvPADLIST (cv));
		382	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
423	PUSHs ((SV *)cv);	383	PUSHs ((SV *)cv);
424		384
425	get_padlist (aTHX_ cv); /* this is a monster */	385	CvDEPTH (cv) = 0;
		386	get_padlist (cv);
426	}	387	}
427	}	388	}
428	#ifdef CXt_FORMAT
429	else if (CxTYPE(cx) == CXt_FORMAT)
430	{
431	/* I never used formats, so how should I know how these are implemented? */
432	/* my bold guess is as a simple, plain sub... */
433	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434	}
435	#endif
436	}	389	}
437		390
438	if (top_si->si_type == PERLSI_MAIN)	391	if (top_si->si_type == PERLSI_MAIN)
439	break;	392	break;
440		393
…		…
444	}	397	}
445		398
446	PUTBACK;	399	PUTBACK;
447	}	400	}
448		401
449	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	402	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
450	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	403	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
451	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	404	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		405	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
452		406
453	c->dowarn = PL_dowarn;	407	#define VAR(name,type)c->name = PL_ ## name;
454	c->in_eval = PL_in_eval;	408	# include "state.h"
455		409	#undef VAR
456	c->curstackinfo = PL_curstackinfo;
457	c->curstack = PL_curstack;
458	c->mainstack = PL_mainstack;
459	c->stack_sp = PL_stack_sp;
460	c->op = PL_op;
461	c->curpad = PL_curpad;
462	c->comppad = PL_comppad;
463	c->compcv = PL_compcv;
464	c->stack_base = PL_stack_base;
465	c->stack_max = PL_stack_max;
466	c->tmps_stack = PL_tmps_stack;
467	c->tmps_floor = PL_tmps_floor;
468	c->tmps_ix = PL_tmps_ix;
469	c->tmps_max = PL_tmps_max;
470	c->markstack = PL_markstack;
471	c->markstack_ptr = PL_markstack_ptr;
472	c->markstack_max = PL_markstack_max;
473	c->scopestack = PL_scopestack;
474	c->scopestack_ix = PL_scopestack_ix;
475	c->scopestack_max = PL_scopestack_max;
476	c->savestack = PL_savestack;
477	c->savestack_ix = PL_savestack_ix;
478	c->savestack_max = PL_savestack_max;
479	#if PERL_VERSION < 9
480	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;
483	#endif
484	c->curpm = PL_curpm;
485	c->curcop = PL_curcop;
486	c->top_env = PL_top_env;
487	}	410	}
488		411
489	/*	412	/*
490	* allocate various perl stacks. This is an exact copy	413	* allocate various perl stacks. This is an exact copy
491	* of perl.c:init_stacks, except that it uses less memory	414	* of perl.c:init_stacks, except that it uses less memory
492	* on the (sometimes correct) assumption that coroutines do	415	* on the (sometimes correct) assumption that coroutines do
493	* not usually need a lot of stackspace.	416	* not usually need a lot of stackspace.
494	*/	417	*/
495	STATIC void	418	#if PREFER_PERL_FUNCTIONS
		419	# define coro_init_stacks init_stacks
		420	#else
		421	static void
496	coro_init_stacks (pTHX)	422	coro_init_stacks ()
497	{	423	{
498	LOCK;
499
500	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	424	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
501	PL_curstackinfo->si_type = PERLSI_MAIN;	425	PL_curstackinfo->si_type = PERLSI_MAIN;
502	PL_curstack = PL_curstackinfo->si_stack;	426	PL_curstack = PL_curstackinfo->si_stack;
503	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	427	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504		428
505	PL_stack_base = AvARRAY(PL_curstack);	429	PL_stack_base = AvARRAY(PL_curstack);
506	PL_stack_sp = PL_stack_base;	430	PL_stack_sp = PL_stack_base;
507	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	431	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508		432
509	New(50,PL_tmps_stack,96,SV*);	433	New(50,PL_tmps_stack,128,SV*);
510	PL_tmps_floor = -1;	434	PL_tmps_floor = -1;
511	PL_tmps_ix = -1;	435	PL_tmps_ix = -1;
512	PL_tmps_max = 96;	436	PL_tmps_max = 128;
513		437
514	New(54,PL_markstack,16,I32);	438	New(54,PL_markstack,32,I32);
515	PL_markstack_ptr = PL_markstack;	439	PL_markstack_ptr = PL_markstack;
516	PL_markstack_max = PL_markstack + 16;	440	PL_markstack_max = PL_markstack + 32;
517		441
518	#ifdef SET_MARK_OFFSET	442	#ifdef SET_MARK_OFFSET
519	SET_MARK_OFFSET;	443	SET_MARK_OFFSET;
520	#endif	444	#endif
521		445
522	New(54,PL_scopestack,16,I32);	446	New(54,PL_scopestack,32,I32);
523	PL_scopestack_ix = 0;	447	PL_scopestack_ix = 0;
524	PL_scopestack_max = 16;	448	PL_scopestack_max = 32;
525		449
526	New(54,PL_savestack,96,ANY);	450	New(54,PL_savestack,64,ANY);
527	PL_savestack_ix = 0;	451	PL_savestack_ix = 0;
528	PL_savestack_max = 96;	452	PL_savestack_max = 64;
529		453
530	#if PERL_VERSION < 9	454	#if !PERL_VERSION_ATLEAST (5,9,0)
531	New(54,PL_retstack,8,OP*);	455	New(54,PL_retstack,16,OP*);
532	PL_retstack_ix = 0;	456	PL_retstack_ix = 0;
533	PL_retstack_max = 8;	457	PL_retstack_max = 16;
534	#endif	458	#endif
535
536	UNLOCK;
537	}	459	}
		460	#endif
538		461
539	/*	462	/*
540	* destroy the stacks, the callchain etc...	463	* destroy the stacks, the callchain etc...
541	*/	464	*/
542	STATIC void	465	static void
543	destroy_stacks(pTHX)	466	coro_destroy_stacks ()
544	{	467	{
545	if (!IN_DESTRUCT)	468	if (!IN_DESTRUCT)
546	{	469	{
547	/* is this ugly, I ask? */	470	/* restore all saved variables and stuff */
548	LEAVE_SCOPE (0);	471	LEAVE_SCOPE (0);
		472	assert (PL_tmps_floor == -1);
549		473
550	/* sure it is, but more important: is it correct?? :/ */	474	/* free all temporaries */
551	FREETMPS;	475	FREETMPS;
		476	assert (PL_tmps_ix == -1);
552		477
		478	/* unwind all extra stacks */
553	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	479	POPSTACK_TO (PL_mainstack);
		480
		481	/* unwind main stack */
		482	dounwind (-1);
554	}	483	}
555		484
556	while (PL_curstackinfo->si_next)	485	while (PL_curstackinfo->si_next)
557	PL_curstackinfo = PL_curstackinfo->si_next;	486	PL_curstackinfo = PL_curstackinfo->si_next;
558		487
559	while (PL_curstackinfo)	488	while (PL_curstackinfo)
560	{	489	{
561	PERL_SI *p = PL_curstackinfo->si_prev;	490	PERL_SI *p = PL_curstackinfo->si_prev;
562		491
563	{ /*D*//*remove*/
564	dSP;
565	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566	PUTBACK; /* possibly superfluous */
567	}
568
569	if (!IN_DESTRUCT)	492	if (!IN_DESTRUCT)
570	{
571	dounwind (-1);/*D*//*remove*/
572	SvREFCNT_dec (PL_curstackinfo->si_stack);	493	SvREFCNT_dec (PL_curstackinfo->si_stack);
573	}
574		494
575	Safefree (PL_curstackinfo->si_cxstack);	495	Safefree (PL_curstackinfo->si_cxstack);
576	Safefree (PL_curstackinfo);	496	Safefree (PL_curstackinfo);
577	PL_curstackinfo = p;	497	PL_curstackinfo = p;
578	}	498	}
579		499
580	Safefree (PL_tmps_stack);	500	Safefree (PL_tmps_stack);
581	Safefree (PL_markstack);	501	Safefree (PL_markstack);
582	Safefree (PL_scopestack);	502	Safefree (PL_scopestack);
583	Safefree (PL_savestack);	503	Safefree (PL_savestack);
584	#if PERL_VERSION < 9	504	#if !PERL_VERSION_ATLEAST (5,9,0)
585	Safefree (PL_retstack);	505	Safefree (PL_retstack);
586	#endif	506	#endif
587	}	507	}
588		508
589	static void	509	static void
590	allocate_stack (Coro__State ctx, int alloc)	510	setup_coro (struct coro *coro)
591	{
592	coro_stack *stack;
593
594	New (0, stack, 1, coro_stack);
595
596	stack->refcnt = 1;
597	stack->usecnt = 1;
598	stack->gencnt = ctx->gencnt = 0;
599
600	if (alloc)
601	{
602	#if HAVE_MMAP
603	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605	if (stack->sptr == (void *)-1)
606	#endif
607	{
608	/*FIXME*//*D*//* reasonable stack size! */
609	stack->ssize = - (STACKSIZE * sizeof (long));
610	New (0, stack->sptr, STACKSIZE, long);
611	}
612	}
613	else
614	stack->sptr = 0;
615
616	ctx->stack = stack;
617	}
618
619	static void
620	deallocate_stack (Coro__State ctx)
621	{
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{
628	if (!--stack->refcnt)
629	{
630	#ifdef HAVE_MMAP
631	if (stack->ssize > 0 && stack->sptr)
632	munmap (stack->sptr, stack->ssize);
633	else
634	#endif
635	Safefree (stack->sptr);
636
637	Safefree (stack);
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}
643
644	static void
645	setup_coro (void *arg)
646	{	511	{
647	/*	512	/*
648	* emulate part of the perl startup here.	513	* emulate part of the perl startup here.
649	*/	514	*/
650	dTHX;	515
		516	coro_init_stacks ();
		517
		518	PL_curcop = &PL_compiling;
		519	PL_in_eval = EVAL_NULL;
		520	PL_curpm = 0;
		521	PL_localizing = 0;
		522	PL_dirty = 0;
		523	PL_restartop = 0;
		524
		525	{
		526	dSP;
		527	LOGOP myop;
		528
		529	SvREFCNT_dec (GvAV (PL_defgv));
		530	GvAV (PL_defgv) = coro->args; coro->args = 0;
		531
		532	Zero (&myop, 1, LOGOP);
		533	myop.op_next = Nullop;
		534	myop.op_flags = OPf_WANT_VOID;
		535
		536	PUSHMARK (SP);
		537	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		538	PUTBACK;
		539	PL_op = (OP *)&myop;
		540	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		541	SPAGAIN;
		542	}
		543
		544	ENTER; /* necessary e.g. for dounwind */
		545	}
		546
		547	static void
		548	free_coro_mortal ()
		549	{
		550	if (coro_mortal)
		551	{
		552	SvREFCNT_dec (coro_mortal);
		553	coro_mortal = 0;
		554	}
		555	}
		556
		557	/* inject a fake call to Coro::State::_cctx_init into the execution */
		558	static void NOINLINE
		559	prepare_cctx (coro_cctx *cctx)
		560	{
651	dSP;	561	dSP;
652	Coro__State ctx = (Coro__State)arg;	562	LOGOP myop;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654		563
655	coro_init_stacks (aTHX);	564	Zero (&myop, 1, LOGOP);
656	/*PL_curcop = 0;*/	565	myop.op_next = PL_op;
657	/*PL_in_eval = PL_in_eval;*/ /* inherit */	566	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
658	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660		567
		568	PUSHMARK (SP);
		569	EXTEND (SP, 2);
		570	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		571	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		572	PUTBACK;
		573	PL_op = (OP *)&myop;
		574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
661	SPAGAIN;	575	SPAGAIN;
662
663	if (ctx->stack)
664	{
665	ctx->cursp = 0;
666
667	PUSHMARK(SP);
668	PUTBACK;
669	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671	if (SvTRUE (ERRSV))
672	croak (NULL);
673	else
674	croak ("FATAL: CCTXT coroutine returned!");
675	}
676	else
677	{
678	UNOP myop;
679
680	PL_op = (OP *)&myop;
681
682	Zero(&myop, 1, UNOP);
683	myop.op_next = Nullop;
684	myop.op_flags = OPf_WANT_VOID;
685
686	PUSHMARK(SP);
687	XPUSHs (sub_init);
688	/*
689	* the next line is slightly wrong, as PL_op->op_next
690	* is actually being executed so we skip the first op.
691	* that doesn't matter, though, since it is only
692	* pp_nextstate and we never return...
693	* ah yes, and I don't care anyways ;)
694	*/
695	PUTBACK;
696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697	SPAGAIN;
698
699	ENTER; /* necessary e.g. for dounwind */
700	}
701	}	576	}
702		577
703	static void	578	static void
704	continue_coro (void *arg)	579	coro_run (void *arg)
705	{	580	{
		581	/* coro_run is the alternative tail of transfer(), so unlock here. */
		582	UNLOCK;
		583
706	/*	584	/*
707	* this is a _very_ stripped down perl interpreter ;)	585	* this is a _very_ stripped down perl interpreter ;)
708	*/	586	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711	JMPENV coro_start_env;
712
713	PL_top_env = &ctx->start_env;	587	PL_top_env = &PL_start_env;
714		588
715	ctx->cursp = 0;	589	/* inject call to cctx_init */
716	PL_op = PL_op->op_next;	590	prepare_cctx ((coro_cctx *)arg);
717	CALLRUNOPS(aTHX);
718		591
		592	/* somebody will hit me for both perl_run and PL_restartop */
		593	PL_restartop = PL_op;
		594	perl_run (PL_curinterp);
		595
		596	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
719	abort ();	597	abort ();
720	}	598	}
721		599
722	STATIC void	600	static coro_cctx *
		601	cctx_new ()
		602	{
		603	coro_cctx *cctx;
		604
		605	++cctx_count;
		606
		607	Newz (0, cctx, 1, coro_cctx);
		608
		609	#if HAVE_MMAP
		610
		611	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		612	/* mmap supposedly does allocate-on-write for us */
		613	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		614
		615	if (cctx->sptr == (void *)-1)
		616	{
		617	perror ("FATAL: unable to mmap stack for coroutine");
		618	_exit (EXIT_FAILURE);
		619	}
		620
		621	# if STACKGUARD
		622	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		623	# endif
		624
		625	#else
		626
		627	cctx->ssize = STACKSIZE * (long)sizeof (long);
		628	New (0, cctx->sptr, STACKSIZE, long);
		629
		630	if (!cctx->sptr)
		631	{
		632	perror ("FATAL: unable to malloc stack for coroutine");
		633	_exit (EXIT_FAILURE);
		634	}
		635
		636	#endif
		637
		638	#if USE_VALGRIND
		639	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		640	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		641	cctx->ssize + (char *)cctx->sptr
		642	);
		643	#endif
		644
		645	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		646
		647	return cctx;
		648	}
		649
		650	static void
		651	cctx_destroy (coro_cctx *cctx)
		652	{
		653	if (!cctx)
		654	return;
		655
		656	--cctx_count;
		657
		658	#if USE_VALGRIND
		659	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		660	#endif
		661
		662	#if HAVE_MMAP
		663	munmap (cctx->sptr, cctx->ssize);
		664	#else
		665	Safefree (cctx->sptr);
		666	#endif
		667
		668	Safefree (cctx);
		669	}
		670
		671	static coro_cctx *
		672	cctx_get ()
		673	{
		674	coro_cctx *cctx;
		675
		676	if (cctx_first)
		677	{
		678	cctx = cctx_first;
		679	cctx_first = cctx->next;
		680	--cctx_idle;
		681	}
		682	else
		683	{
		684	cctx = cctx_new ();
		685	PL_op = PL_op->op_next;
		686	}
		687
		688	return cctx;
		689	}
		690
		691	static void
		692	cctx_put (coro_cctx *cctx)
		693	{
		694	/* free another cctx if overlimit */
		695	if (cctx_idle >= MAX_IDLE_CCTX)
		696	{
		697	coro_cctx *first = cctx_first;
		698	cctx_first = first->next;
		699	--cctx_idle;
		700
		701	assert (!first->inuse);
		702	cctx_destroy (first);
		703	}
		704
		705	++cctx_idle;
		706	cctx->next = cctx_first;
		707	cctx_first = cctx;
		708	}
		709
		710	/* never call directly, always through the coro_state_transfer global variable */
		711	static void NOINLINE
723	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	712	transfer (struct coro *prev, struct coro *next)
724	{	713	{
725	dSTACKLEVEL;	714	dSTACKLEVEL;
726		715
		716	/* sometimes transfer is only called to set idle_sp */
		717	if (!next)
		718	{
		719	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		720	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		721	}
727	if (prev != next)	722	else if (prev != next)
728	{	723	{
729	if (next->mainstack)	724	coro_cctx *prev__cctx;
		725
		726	if (prev->flags & CF_NEW)
730	{	727	{
731	LOCK;	728	/* create a new empty context */
732	SAVE (prev, flags);	729	Newz (0, prev->cctx, 1, coro_cctx);
733	LOAD (next);	730	prev->cctx->inuse = 1;
734	UNLOCK;	731	prev->flags &= ~CF_NEW;
735		732	prev->flags |= CF_RUNNING;
736	/* mark this state as in-use */
737	next->mainstack = 0;
738	next->tmps_ix = -2;
739
740	/* stacklevel changed? if yes, grab the stack for us! */
741	if (flags & TRANSFER_SAVE_CCTXT)
742	{
743	if (!prev->stack)
744	allocate_stack (prev, 0);
745	else if (prev->cursp != stacklevel
746	&& prev->stack->usecnt > 1)
747	{
748	prev->gencnt = ++prev->stack->gencnt;
749	prev->stack->usecnt = 1;
750	}
751
752	/* has our stack been invalidated? */
753	if (next->stack && next->stack->gencnt != next->gencnt)
754	{
755	deallocate_stack (next);
756	allocate_stack (next, 1);
757	coro_create (&(next->stack->cctx),
758	continue_coro, (void *)next,
759	next->stack->sptr, labs (next->stack->ssize));
760	}
761
762	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763	prev->cursp = stacklevel;
764	/* don't add any code here */
765	}
766	else
767	next->cursp = stacklevel;
768	}	733	}
769	else if (next->tmps_ix == -2)	734
770	croak ("tried to transfer to running coroutine");	735	/*TODO: must not croak here */
		736	if (!prev->flags & CF_RUNNING)
		737	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		738
		739	if (next->flags & CF_RUNNING)
		740	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		741
		742	if (next->flags & CF_DESTROYED)
		743	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		744
		745	prev->flags &= ~CF_RUNNING;
		746	next->flags |= CF_RUNNING;
		747
		748	LOCK;
		749
		750	if (next->flags & CF_NEW)
		751	{
		752	/* need to start coroutine */
		753	next->flags &= ~CF_NEW;
		754	/* first get rid of the old state */
		755	save_perl (prev);
		756	/* setup coroutine call */
		757	setup_coro (next);
		758	/* need a new stack */
		759	assert (!next->cctx);
		760	}
771	else	761	else
772	{	762	{
773	LOCK;	763	/* coroutine already started */
774	SAVE (prev, -1); /* first get rid of the old state */	764	save_perl (prev);
775	UNLOCK;	765	load_perl (next);
776
777	if (flags & TRANSFER_SAVE_CCTXT)
778	{
779	if (!prev->stack)
780	allocate_stack (prev, 0);
781
782	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783	{
784	PL_top_env = &next->start_env;
785
786	setup_coro (next);
787	next->cursp = stacklevel;
788
789	prev->stack->refcnt++;
790	prev->stack->usecnt++;
791	next->stack = prev->stack;
792	next->gencnt = prev->gencnt;
793	}
794	else
795	{
796	assert (!next->stack);
797	allocate_stack (next, 1);
798	coro_create (&(next->stack->cctx),
799	setup_coro, (void *)next,
800	next->stack->sptr, labs (next->stack->ssize));
801	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802	prev->cursp = stacklevel;
803	/* don't add any code here */
804	}
805	}
806	else
807	{
808	setup_coro (next);
809	next->cursp = stacklevel;
810	}
811	}	766	}
812	}
813		767
814	LOCK;	768	prev__cctx = prev->cctx;
815	if (coro_mortal)	769
816	{	770	/* possibly "free" the cctx */
817	SvREFCNT_dec (coro_mortal);	771	if (prev__cctx->idle_sp == STACKLEVEL)
		772	{
		773	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		774	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		775
		776	prev->cctx = 0;
		777
		778	cctx_put (prev__cctx);
		779	prev__cctx->inuse = 0;
		780	}
		781
		782	if (!next->cctx)
		783	{
		784	next->cctx = cctx_get ();
		785	assert (!next->cctx->inuse);
		786	next->cctx->inuse = 1;
		787	}
		788
		789	if (prev__cctx != next->cctx)
		790	{
		791	prev__cctx->top_env = PL_top_env;
		792	PL_top_env = next->cctx->top_env;
		793	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		794	}
		795
818	coro_mortal = 0;	796	free_coro_mortal ();
819	}
820	UNLOCK;	797	UNLOCK;
		798	}
821	}	799	}
822		800
823	#define SV_CORO(sv,func) \	801	struct transfer_args
824	do { \	802	{
825	if (SvROK (sv)) \	803	struct coro *prev, *next;
826	sv = SvRV (sv); \	804	};
827	\
828	if (SvTYPE (sv) == SVt_PVHV) \
829	{ \
830	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831	\
832	if (!he) \
833	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834	\
835	(sv) = SvRV (HeVAL(he)); \
836	} \
837	\
838	/* must also be changed inside Coro::Cont::yield */ \
839	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841	\
842	} while(0)
843		805
844	#define SvSTATE(sv) (struct coro *)SvIV (sv)	806	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
845		807
846	static void	808	static int
		809	coro_state_destroy (struct coro *coro)
		810	{
		811	if (coro->flags & CF_DESTROYED)
		812	return 0;
		813
		814	coro->flags |= CF_DESTROYED;
		815
		816	if (coro->mainstack && coro->mainstack != main_mainstack)
		817	{
		818	assert (!(coro->flags & CF_RUNNING));
		819
		820	struct coro temp;
		821	Zero (&temp, 1, struct coro);
		822	temp.save = CORO_SAVE_ALL;
		823
		824	if (coro->flags & CF_RUNNING)
		825	croak ("FATAL: tried to destroy currently running coroutine");
		826
		827	save_perl (&temp);
		828	load_perl (coro);
		829
		830	coro_destroy_stacks ();
		831
		832	load_perl (&temp); /* this will get rid of defsv etc.. */
		833
		834	coro->mainstack = 0;
		835	}
		836
		837	cctx_destroy (coro->cctx);
		838	SvREFCNT_dec (coro->args);
		839
		840	return 1;
		841	}
		842
		843	static int
		844	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		845	{
		846	struct coro *coro = (struct coro *)mg->mg_ptr;
		847	mg->mg_ptr = 0;
		848
		849	if (--coro->refcnt < 0)
		850	{
		851	coro_state_destroy (coro);
		852	Safefree (coro);
		853	}
		854
		855	return 0;
		856	}
		857
		858	static int
		859	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		860	{
		861	struct coro *coro = (struct coro *)mg->mg_ptr;
		862
		863	++coro->refcnt;
		864
		865	return 0;
		866	}
		867
		868	static MGVTBL coro_state_vtbl = {
		869	0, 0, 0, 0,
		870	coro_state_free,
		871	0,
		872	#ifdef MGf_DUP
		873	coro_state_dup,
		874	#else
		875	# define MGf_DUP 0
		876	#endif
		877	};
		878
		879	static struct coro *
		880	SvSTATE (SV *coro)
		881	{
		882	HV *stash;
		883	MAGIC *mg;
		884
		885	if (SvROK (coro))
		886	coro = SvRV (coro);
		887
		888	stash = SvSTASH (coro);
		889	if (stash != coro_stash && stash != coro_state_stash)
		890	{
		891	/* very slow, but rare, check */
		892	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		893	croak ("Coro::State object required");
		894	}
		895
		896	mg = SvMAGIC (coro);
		897	assert (mg->mg_type == PERL_MAGIC_ext);
		898	return (struct coro *)mg->mg_ptr;
		899	}
		900
		901	static void
		902	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		903	{
		904	ta->prev = SvSTATE (prev_sv);
		905	ta->next = SvSTATE (next_sv);
		906	}
		907
		908	static void
847	api_transfer(pTHX_ SV *prev, SV *next, int flags)	909	api_transfer (SV *prev_sv, SV *next_sv)
848	{	910	{
849	SV_CORO (prev, "Coro::transfer");	911	struct transfer_args ta;
850	SV_CORO (next, "Coro::transfer");
851		912
852	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	913	prepare_transfer (&ta, prev_sv, next_sv);
		914	TRANSFER (ta);
		915	}
		916
		917	static int
		918	api_save (SV *coro_sv, int new_save)
		919	{
		920	struct coro *coro = SvSTATE (coro_sv);
		921	int old_save = coro->save;
		922
		923	if (new_save >= 0)
		924	coro->save = new_save;
		925
		926	return old_save;
853	}	927	}
854		928
855	/** Coro ********************************************************************/	929	/** Coro ********************************************************************/
856		930
857	#define PRIO_MAX 3	931	#define PRIO_MAX 3
…		…
860	#define PRIO_LOW -1	934	#define PRIO_LOW -1
861	#define PRIO_IDLE -3	935	#define PRIO_IDLE -3
862	#define PRIO_MIN -4	936	#define PRIO_MIN -4
863		937
864	/* for Coro.pm */	938	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;	939	static SV *coro_current;
866	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	940	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;	941	static int coro_nready;
868		942
869	static void	943	static void
870	coro_enq (pTHX_ SV *sv)	944	coro_enq (SV *coro_sv)
871	{	945	{
872	SV **xprio;
873	int prio;
874
875	if (SvTYPE (sv) != SVt_PVHV)
876	croak ("Coro::ready tried to enqueue something that is not a coroutine");
877
878	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
879	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
880
881	prio = prio > PRIO_MAX ? PRIO_MAX
882	: prio < PRIO_MIN ? PRIO_MIN
883	: prio;
884
885	av_push (coro_ready [prio - PRIO_MIN], sv);	946	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
886	coro_nready++;	947	coro_nready++;
887	}	948	}
888		949
889	static SV *	950	static SV *
890	coro_deq (pTHX_ int min_prio)	951	coro_deq (int min_prio)
891	{	952	{
892	int prio = PRIO_MAX - PRIO_MIN;	953	int prio = PRIO_MAX - PRIO_MIN;
893		954
894	min_prio -= PRIO_MIN;	955	min_prio -= PRIO_MIN;
895	if (min_prio < 0)	956	if (min_prio < 0)
896	min_prio = 0;	957	min_prio = 0;
897		958
898	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	959	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
899	if (av_len (coro_ready[prio]) >= 0)	960	if (AvFILLp (coro_ready [prio]) >= 0)
900	{	961	{
901	coro_nready--;	962	coro_nready--;
902	return av_shift (coro_ready[prio]);	963	return av_shift (coro_ready [prio]);
903	}	964	}
904		965
905	return 0;	966	return 0;
906	}	967	}
907		968
908	static void	969	static int
909	api_ready (SV *coro)	970	api_ready (SV *coro_sv)
910	{	971	{
911	dTHX;	972	struct coro *coro;
912		973
913	if (SvROK (coro))	974	if (SvROK (coro_sv))
914	coro = SvRV (coro);	975	coro_sv = SvRV (coro_sv);
		976
		977	coro = SvSTATE (coro_sv);
		978
		979	if (coro->flags & CF_READY)
		980	return 0;
		981
		982	coro->flags |= CF_READY;
915		983
916	LOCK;	984	LOCK;
917	coro_enq (aTHX_ SvREFCNT_inc (coro));	985	coro_enq (SvREFCNT_inc (coro_sv));
918	UNLOCK;	986	UNLOCK;
		987
		988	return 1;
		989	}
		990
		991	static int
		992	api_is_ready (SV *coro_sv)
		993	{
		994	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		995	}
		996
		997	static void
		998	prepare_schedule (struct transfer_args *ta)
		999	{
		1000	SV *prev_sv, *next_sv;
		1001
		1002	for (;;)
		1003	{
		1004	LOCK;
		1005	next_sv = coro_deq (PRIO_MIN);
		1006	UNLOCK;
		1007
		1008	/* nothing to schedule: call the idle handler */
		1009	if (!next_sv)
		1010	{
		1011	dSP;
		1012
		1013	ENTER;
		1014	SAVETMPS;
		1015
		1016	PUSHMARK (SP);
		1017	PUTBACK;
		1018	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1019
		1020	FREETMPS;
		1021	LEAVE;
		1022	continue;
		1023	}
		1024
		1025	ta->next = SvSTATE (next_sv);
		1026
		1027	/* cannot transfer to destroyed coros, skip and look for next */
		1028	if (ta->next->flags & CF_DESTROYED)
		1029	{
		1030	SvREFCNT_dec (next_sv);
		1031	continue;
		1032	}
		1033
		1034	break;
		1035	}
		1036
		1037	/* free this only after the transfer */
		1038	prev_sv = SvRV (coro_current);
		1039	SvRV_set (coro_current, next_sv);
		1040	ta->prev = SvSTATE (prev_sv);
		1041
		1042	assert (ta->next->flags & CF_READY);
		1043	ta->next->flags &= ~CF_READY;
		1044
		1045	LOCK;
		1046	free_coro_mortal ();
		1047	coro_mortal = prev_sv;
		1048	UNLOCK;
		1049	}
		1050
		1051	static void
		1052	prepare_cede (struct transfer_args *ta)
		1053	{
		1054	api_ready (coro_current);
		1055	prepare_schedule (ta);
		1056	}
		1057
		1058	static int
		1059	prepare_cede_notself (struct transfer_args *ta)
		1060	{
		1061	if (coro_nready)
		1062	{
		1063	SV *prev = SvRV (coro_current);
		1064	prepare_schedule (ta);
		1065	api_ready (prev);
		1066	return 1;
		1067	}
		1068	else
		1069	return 0;
919	}	1070	}
920		1071
921	static void	1072	static void
922	api_schedule (void)	1073	api_schedule (void)
923	{	1074	{
924	dTHX;	1075	struct transfer_args ta;
925		1076
926	SV *prev, *next;	1077	prepare_schedule (&ta);
927		1078	TRANSFER (ta);
928	LOCK;
929
930	prev = SvRV (GvSV (coro_current));
931	next = coro_deq (aTHX_ PRIO_MIN);
932
933	if (!next)
934	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
935
936	/* free this only after the transfer */
937	coro_mortal = prev;
938	SV_CORO (prev, "Coro::schedule");
939
940	SvRV (GvSV (coro_current)) = next;
941
942	SV_CORO (next, "Coro::schedule");
943
944	UNLOCK;
945
946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
947	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
948	}	1079	}
949		1080
950	static void	1081	static int
951	api_cede (void)	1082	api_cede (void)
952	{	1083	{
953	dTHX;	1084	struct transfer_args ta;
954		1085
955	LOCK;	1086	prepare_cede (&ta);
956	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
957	UNLOCK;
958		1087
959	api_schedule ();	1088	if (ta.prev != ta.next)
		1089	{
		1090	TRANSFER (ta);
		1091	return 1;
		1092	}
		1093	else
		1094	return 0;
		1095	}
		1096
		1097	static int
		1098	api_cede_notself (void)
		1099	{
		1100	struct transfer_args ta;
		1101
		1102	if (prepare_cede_notself (&ta))
		1103	{
		1104	TRANSFER (ta);
		1105	return 1;
		1106	}
		1107	else
		1108	return 0;
960	}	1109	}
961		1110
962	MODULE = Coro::State PACKAGE = Coro::State	1111	MODULE = Coro::State PACKAGE = Coro::State
963		1112
964	PROTOTYPES: ENABLE	1113	PROTOTYPES: DISABLE
965		1114
966	BOOT:	1115	BOOT:
967	{ /* {} necessary for stoopid perl-5.6.x */	1116	{
968	#ifdef USE_ITHREADS	1117	#ifdef USE_ITHREADS
969	MUTEX_INIT (&coro_mutex);	1118	MUTEX_INIT (&coro_mutex);
970	#endif	1119	#endif
		1120	BOOT_PAGESIZE;
971		1121
972	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
973	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
974	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1122	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
975		1123
976	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
977	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1125	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
978	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1126	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1127	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
979	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1128	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
980		1129
981	main_mainstack = PL_mainstack;	1130	main_mainstack = PL_mainstack;
982		1131
983	coroapi.ver = CORO_API_VERSION;	1132	coroapi.ver = CORO_API_VERSION;
984	coroapi.transfer = api_transfer;	1133	coroapi.transfer = api_transfer;
985	}
986		1134
987	Coro::State	1135	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
988	_newprocess(args)	1136	}
989	SV * args	1137
990	PROTOTYPE: $	1138	SV *
		1139	new (char *klass, ...)
991	CODE:	1140	CODE:
992	Coro__State coro;	1141	{
		1142	struct coro *coro;
		1143	HV *hv;
		1144	int i;
993		1145
994	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
995	croak ("Coro::State::_newprocess expects an arrayref");
996
997	Newz (0, coro, 1, struct coro);	1146	Newz (0, coro, 1, struct coro);
		1147	coro->args = newAV ();
		1148	coro->save = CORO_SAVE_ALL;
		1149	coro->flags = CF_NEW;
998		1150
999	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1151	hv = newHV ();
1000	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1152	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1001	/*coro->stack = 0;*/	1153	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1002		1154
1003	/* same as JMPENV_BOOTSTRAP */	1155	for (i = 1; i < items; i++)
1004	/* we might be able to recycle start_env, but safe is safe */	1156	av_push (coro->args, newSVsv (ST (i)));
1005	/*Zero(&coro->start_env, 1, JMPENV);*/	1157	}
1006	coro->start_env.je_ret = -1;
1007	coro->start_env.je_mustcatch = TRUE;
1008
1009	RETVAL = coro;
1010	OUTPUT:	1158	OUTPUT:
1011	RETVAL	1159	RETVAL
1012		1160
		1161	int
		1162	save (SV *coro, int new_save = -1)
		1163	CODE:
		1164	RETVAL = api_save (coro, new_save);
		1165	OUTPUT:
		1166	RETVAL
		1167
1013	void	1168	void
1014	transfer(prev, next, flags)	1169	_set_stacklevel (...)
1015	SV *prev	1170	ALIAS:
1016	SV *next	1171	Coro::State::transfer = 1
1017	int flags	1172	Coro::schedule = 2
1018	PROTOTYPE: @	1173	Coro::cede = 3
		1174	Coro::cede_notself = 4
1019	CODE:	1175	CODE:
1020	PUTBACK;	1176	{
1021	SV_CORO (next, "Coro::transfer");	1177	struct transfer_args ta;
1022	SV_CORO (prev, "Coro::transfer");	1178
1023	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1179	switch (ix)
1024	SPAGAIN;	1180	{
		1181	case 0:
		1182	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1183	ta.next = 0;
		1184	break;
		1185
		1186	case 1:
		1187	if (items != 2)
		1188	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1189
		1190	prepare_transfer (&ta, ST (0), ST (1));
		1191	break;
		1192
		1193	case 2:
		1194	prepare_schedule (&ta);
		1195	break;
		1196
		1197	case 3:
		1198	prepare_cede (&ta);
		1199	break;
		1200
		1201	case 4:
		1202	if (!prepare_cede_notself (&ta))
		1203	XSRETURN_EMPTY;
		1204
		1205	break;
		1206	}
		1207
		1208	BARRIER;
		1209	TRANSFER (ta);
		1210
		1211	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1212	XSRETURN_YES;
		1213	}
		1214
		1215	bool
		1216	_destroy (SV *coro_sv)
		1217	CODE:
		1218	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1219	OUTPUT:
		1220	RETVAL
1025		1221
1026	void	1222	void
1027	DESTROY(coro)
1028	Coro::State coro
1029	CODE:
1030
1031	if (coro->mainstack && coro->mainstack != main_mainstack)
1032	{
1033	struct coro temp;
1034
1035	PUTBACK;
1036	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1037	LOAD (aTHX_ coro);
1038	SPAGAIN;
1039
1040	destroy_stacks (aTHX);
1041
1042	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1043	SPAGAIN;
1044
1045	coro->mainstack = 0;
1046	}
1047
1048	deallocate_stack (coro);
1049	SvREFCNT_dec (coro->args);
1050	Safefree (coro);
1051
1052	void
1053	_exit(code)	1223	_exit (code)
1054	int code	1224	int code
1055	PROTOTYPE: $	1225	PROTOTYPE: $
1056	CODE:	1226	CODE:
1057	_exit (code);	1227	_exit (code);
1058		1228
1059	MODULE = Coro::State PACKAGE = Coro::Cont	1229	int
		1230	cctx_count ()
		1231	CODE:
		1232	RETVAL = cctx_count;
		1233	OUTPUT:
		1234	RETVAL
1060		1235
1061	# this is slightly dirty (should expose a c-level api)	1236	int
1062		1237	cctx_idle ()
1063	void	1238	CODE:
1064	yield(...)	1239	RETVAL = cctx_idle;
1065	PROTOTYPE: @	1240	OUTPUT:
1066	CODE:	1241	RETVAL
1067	SV *yieldstack;
1068	SV *sv;
1069	AV *defav = GvAV (PL_defgv);
1070	struct coro *prev, *next;
1071
1072	yieldstack = *hv_fetch (
1073	(HV *)SvRV (GvSV (coro_current)),
1074	"yieldstack", sizeof ("yieldstack") - 1,
1075	0
1076	);
1077
1078	/* set up @_ -- ugly */
1079	av_clear (defav);
1080	av_fill (defav, items - 1);
1081	while (items--)
1082	av_store (defav, items, SvREFCNT_inc (ST(items)));
1083
1084	sv = av_pop ((AV *)SvRV (yieldstack));
1085	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1086	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1087	SvREFCNT_dec (sv);
1088
1089	transfer (aTHX_ prev, next, 0);
1090		1242
1091	MODULE = Coro::State PACKAGE = Coro	1243	MODULE = Coro::State PACKAGE = Coro
1092		1244
1093	# this is slightly dirty (should expose a c-level api)
1094
1095	BOOT:	1245	BOOT:
1096	{	1246	{
1097	int i;	1247	int i;
		1248
1098	HV *stash = gv_stashpv ("Coro", TRUE);	1249	coro_stash = gv_stashpv ("Coro", TRUE);
1099		1250
1100	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1251	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1101	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1252	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1102	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1253	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1103	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1254	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1104	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1255	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1105	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1256	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1106		1257
1107	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1258	coro_current = get_sv ("Coro::current", FALSE);
1108	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1259	SvREADONLY_on (coro_current);
1109		1260
1110	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1261	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1111	coro_ready[i] = newAV ();	1262	coro_ready[i] = newAV ();
1112		1263
1113	{	1264	{
1114	SV *sv = perl_get_sv("Coro::API", 1);	1265	SV *sv = perl_get_sv("Coro::API", 1);
1115		1266
1116	coroapi.schedule = api_schedule;	1267	coroapi.schedule = api_schedule;
		1268	coroapi.save = api_save;
1117	coroapi.cede = api_cede;	1269	coroapi.cede = api_cede;
		1270	coroapi.cede_notself = api_cede_notself;
1118	coroapi.ready = api_ready;	1271	coroapi.ready = api_ready;
		1272	coroapi.is_ready = api_is_ready;
1119	coroapi.nready = &coro_nready;	1273	coroapi.nready = &coro_nready;
1120	coroapi.current = coro_current;	1274	coroapi.current = coro_current;
1121		1275
1122	GCoroAPI = &coroapi;	1276	GCoroAPI = &coroapi;
1123	sv_setiv(sv, (IV)&coroapi);	1277	sv_setiv (sv, (IV)&coroapi);
1124	SvREADONLY_on(sv);	1278	SvREADONLY_on (sv);
1125	}	1279	}
1126	}	1280	}
1127		1281
1128	#if !PERL_MICRO
1129
1130	void	1282	void
1131	ready(self)	1283	_set_current (SV *current)
1132	SV * self
1133	PROTOTYPE: $	1284	PROTOTYPE: $
1134	CODE:	1285	CODE:
1135	api_ready (self);	1286	SvREFCNT_dec (SvRV (coro_current));
1136		1287	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1137	#endif
1138		1288
1139	int	1289	int
		1290	prio (Coro::State coro, int newprio = 0)
		1291	ALIAS:
		1292	nice = 1
		1293	CODE:
		1294	{
		1295	RETVAL = coro->prio;
		1296
		1297	if (items > 1)
		1298	{
		1299	if (ix)
		1300	newprio = coro->prio - newprio;
		1301
		1302	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1303	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1304
		1305	coro->prio = newprio;
		1306	}
		1307	}
		1308	OUTPUT:
		1309	RETVAL
		1310
		1311	SV *
		1312	ready (SV *self)
		1313	PROTOTYPE: $
		1314	CODE:
		1315	RETVAL = boolSV (api_ready (self));
		1316	OUTPUT:
		1317	RETVAL
		1318
		1319	SV *
		1320	is_ready (SV *self)
		1321	PROTOTYPE: $
		1322	CODE:
		1323	RETVAL = boolSV (api_is_ready (self));
		1324	OUTPUT:
		1325	RETVAL
		1326
		1327	int
1140	nready(...)	1328	nready (...)
1141	PROTOTYPE:	1329	PROTOTYPE:
1142	CODE:	1330	CODE:
1143	RETVAL = coro_nready;	1331	RETVAL = coro_nready;
1144	OUTPUT:	1332	OUTPUT:
1145	RETVAL	1333	RETVAL
1146		1334
1147	void	1335	MODULE = Coro::State PACKAGE = Coro::AIO
1148	schedule(...)	1336
1149	PROTOTYPE:	1337	SV *
		1338	_get_state ()
1150	CODE:	1339	CODE:
1151	api_schedule ();
1152
1153	void
1154	cede(...)
1155	PROTOTYPE:
1156	CODE:
1157	api_cede ();
1158
1159	# and these are hacks
1160	SV *
1161	_aio_get_state ()
1162	CODE:
1163	{	1340	{
1164	struct {	1341	struct io_state *data;
1165	int errorno;
1166	int laststype;
1167	int laststatval;
1168	Stat_t statcache;
1169	} data;
1170		1342
		1343	RETVAL = newSV (sizeof (struct io_state));
		1344	data = (struct io_state *)SvPVX (RETVAL);
		1345	SvCUR_set (RETVAL, sizeof (struct io_state));
		1346	SvPOK_only (RETVAL);
		1347
1171	data.errorno = errno;	1348	data->errorno = errno;
1172	data.laststype = PL_laststype;	1349	data->laststype = PL_laststype;
1173	data.laststatval = PL_laststatval;	1350	data->laststatval = PL_laststatval;
1174	data.statcache = PL_statcache;	1351	data->statcache = PL_statcache;
1175
1176	RETVAL = newSVpvn ((char *)&data, sizeof data);
1177	}	1352	}
1178	OUTPUT:	1353	OUTPUT:
1179	RETVAL	1354	RETVAL
1180		1355
1181	void	1356	void
1182	_aio_set_state (char *data_)	1357	_set_state (char *data_)
1183	PROTOTYPE: $	1358	PROTOTYPE: $
1184	CODE:	1359	CODE:
1185	{	1360	{
1186	struct {	1361	struct io_state *data = (void *)data_;
1187	int errorno;
1188	int laststype;
1189	int laststatval;
1190	Stat_t statcache;
1191	} *data = (void *)data_;
1192		1362
1193	errno = data->errorno;	1363	errno = data->errorno;
1194	PL_laststype = data->laststype;	1364	PL_laststype = data->laststype;
1195	PL_laststatval = data->laststatval;	1365	PL_laststatval = data->laststatval;
1196	PL_statcache = data->statcache;	1366	PL_statcache = data->statcache;
1197	}	1367	}
		1368

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