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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.76 by root, Thu Oct 26 08:45:56 2006 UTC vs.
Revision 1.133 by root, Thu Jan 4 20:14:19 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		71	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	72	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	73	#endif
44	#endif
45		74
46	#define SUB_INIT "Coro::State::initialize"	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#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
48		87
49	/* 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
50	* 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
51	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
53		93
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		95
56	#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))
57		105
58	#include "CoroAPI.h"	106	#include "CoroAPI.h"
59		107
60	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
…		…
64	#else	112	#else
65	# define LOCK (void)0	113	# define LOCK (void)0
66	# define UNLOCK (void)0	114	# define UNLOCK (void)0
67	#endif	115	#endif
68		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
		124
69	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	126	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	127	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	128	static SV *coro_mortal; /* will be freed after next transfer */
75		129
76	/* 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 */
77	typedef struct {	134	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	135	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		136
82	coro_context cctx;	137	/* the stack */
83
84	void *sptr;	138	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		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 */
88	struct coro {	162	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	163	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	164	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136		165
137	/* data associated with this coroutine (initial args) */	166	/* data associated with this coroutine (initial args) */
138	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;
139	};	185	};
140		186
141	typedef struct coro *Coro__State;	187	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	188	typedef struct coro *Coro__State_or_hashref;
143		189
144	/* mostly copied from op.c:cv_clone2 */	190	static AV *
145	STATIC AV *	191	coro_clone_padlist (CV *cv)
146	clone_padlist (pTHX_ AV *protopadlist)
147	{	192	{
148	AV *av;	193	AV *padlist = CvPADLIST (cv);
149	I32 ix;
150	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
151	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
152	SV **pname = AvARRAY (protopad_name);
153	SV **ppad = AvARRAY (protopad);
154	I32 fname = AvFILLp (protopad_name);
155	I32 fpad = AvFILLp (protopad);
156	AV *newpadlist, *newpad_name, *newpad;	194	AV *newpadlist, *newpad;
157	SV **npad;
158
159	newpad_name = newAV ();
160	for (ix = fname; ix >= 0; ix--)
161	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163	newpad = newAV ();
164	av_fill (newpad, AvFILLp (protopad));
165	npad = AvARRAY (newpad);
166		195
167	newpadlist = newAV ();	196	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	197	AvREAL_off (newpadlist);
169	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)));
170	av_store (newpadlist, 1, (SV *) newpad);	207	av_store (newpadlist, 1, (SV *)newpad);
171
172	av = newAV (); /* will be @_ */
173	av_extend (av, 0);
174	av_store (newpad, 0, (SV *) av);
175	AvREIFY_on (av);
176
177	for (ix = fpad; ix > 0; ix--)
178	{
179	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
180
181	if (namesv && namesv != &PL_sv_undef)
182	{
183	char *name = SvPVX (namesv); /* XXX */
184
185	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
186	{ /* lexical from outside? */
187	npad[ix] = SvREFCNT_inc (ppad[ix]);
188	}
189	else
190	{ /* our own lexical */
191	SV *sv;
192	if (*name == '&')
193	sv = SvREFCNT_inc (ppad[ix]);
194	else if (*name == '@')
195	sv = (SV *) newAV ();
196	else if (*name == '%')
197	sv = (SV *) newHV ();
198	else
199	sv = NEWSV (0, 0);
200
201	#ifdef SvPADBUSY
202	if (!SvPADBUSY (sv))
203	#endif
204	SvPADMY_on (sv);
205
206	npad[ix] = sv;
207	}
208	}
209	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210	{
211	npad[ix] = SvREFCNT_inc (ppad[ix]);
212	}
213	else
214	{
215	SV *sv = NEWSV (0, 0);
216	SvPADTMP_on (sv);
217	npad[ix] = sv;
218	}
219	}
220
221	#if 0 /* return -ENOTUNDERSTOOD */
222	/* Now that vars are all in place, clone nested closures. */
223
224	for (ix = fpad; ix > 0; ix--) {
225	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226	if (namesv
227	&& namesv != &PL_sv_undef
228	&& !(SvFLAGS(namesv) & SVf_FAKE)
229	&& *SvPVX(namesv) == '&'
230	&& CvCLONE(ppad[ix]))
231	{
232	CV *kid = cv_clone((CV*)ppad[ix]);
233	SvREFCNT_dec(ppad[ix]);
234	CvCLONE_on(kid);
235	SvPADMY_on(kid);
236	npad[ix] = (SV*)kid;
237	}
238	}
239	#endif
240		208
241	return newpadlist;	209	return newpadlist;
242	}	210	}
243		211
244	STATIC void	212	static void
245	free_padlist (pTHX_ AV *padlist)	213	free_padlist (AV *padlist)
246	{	214	{
247	/* may be during global destruction */	215	/* may be during global destruction */
248	if (SvREFCNT (padlist))	216	if (SvREFCNT (padlist))
249	{	217	{
250	I32 i = AvFILLp (padlist);	218	I32 i = AvFILLp (padlist);
…		…
263		231
264	SvREFCNT_dec ((SV*)padlist);	232	SvREFCNT_dec ((SV*)padlist);
265	}	233	}
266	}	234	}
267		235
268	STATIC int	236	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	237	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	238	{
271	AV *padlist;	239	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	240	AV *av = (AV *)mg->mg_obj;
273		241
274	/* casting is fun. */	242	/* casting is fun. */
275	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	243	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276	free_padlist (aTHX_ padlist);	244	free_padlist (padlist);
277		245
278	SvREFCNT_dec (av);	246	SvREFCNT_dec (av);
279		247
280	return 0;	248	return 0;
281	}	249	}
282		250
283	#define PERL_MAGIC_coro PERL_MAGIC_ext	251	#define PERL_MAGIC_coro PERL_MAGIC_ext
284		252
285	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	253	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
286		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
287	/* the next two functions merely cache the padlists */	262	/* the next two functions merely cache the padlists */
288	STATIC void	263	static void
289	get_padlist (pTHX_ CV *cv)	264	get_padlist (CV *cv)
290	{	265	{
291	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	MAGIC *mg = CORO_MAGIC (cv);
		267	AV *av;
292		268
293	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
294	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
295	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
296	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	280	CvPADLIST (cv) = coro_clone_padlist (cv);
		281	#endif
		282	}
297	}	283	}
298		284
299	STATIC void	285	static void
300	put_padlist (pTHX_ CV *cv)	286	put_padlist (CV *cv)
301	{	287	{
302	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
303		290
304	if (!mg)	291	if (!mg)
305	{	292	{
306	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
307	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
308	mg->mg_virtual = &vtbl_coro;	295	mg->mg_virtual = &vtbl_coro;
309	mg->mg_obj = (SV *)newAV ();	296	mg->mg_obj = (SV *)newAV ();
310	}	297	}
311		298
312	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);
313	}	305	}
314		306
315	#define SB do {	307	#define SB do {
316	#define SE } while (0)	308	#define SE } while (0)
317		309
318	#define LOAD(state) load_state(aTHX_ (state));
319	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
320
321	#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
322		311
323	static void	312	static void
324	load_state(pTHX_ Coro__State c)	313	load_perl (Coro__State c)
325	{	314	{
326	PL_dowarn = c->dowarn;	315	#define VAR(name,type) PL_ ## name = c->name;
327	PL_in_eval = c->in_eval;	316	# include "state.h"
328		317	#undef VAR
329	PL_curstackinfo = c->curstackinfo;
330	PL_curstack = c->curstack;
331	PL_mainstack = c->mainstack;
332	PL_stack_sp = c->stack_sp;
333	PL_op = c->op;
334	PL_curpad = c->curpad;
335	PL_comppad = c->comppad;
336	PL_compcv = c->compcv;
337	PL_stack_base = c->stack_base;
338	PL_stack_max = c->stack_max;
339	PL_tmps_stack = c->tmps_stack;
340	PL_tmps_floor = c->tmps_floor;
341	PL_tmps_ix = c->tmps_ix;
342	PL_tmps_max = c->tmps_max;
343	PL_markstack = c->markstack;
344	PL_markstack_ptr = c->markstack_ptr;
345	PL_markstack_max = c->markstack_max;
346	PL_scopestack = c->scopestack;
347	PL_scopestack_ix = c->scopestack_ix;
348	PL_scopestack_max = c->scopestack_max;
349	PL_savestack = c->savestack;
350	PL_savestack_ix = c->savestack_ix;
351	PL_savestack_max = c->savestack_max;
352	#if PERL_VERSION < 9
353	PL_retstack = c->retstack;
354	PL_retstack_ix = c->retstack_ix;
355	PL_retstack_max = c->retstack_max;
356	#endif
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	#if PERL_VERSION < 9
481	c->retstack = PL_retstack;
482	c->retstack_ix = PL_retstack_ix;
483	c->retstack_max = PL_retstack_max;
484	#endif
485	c->curpm = PL_curpm;
486	c->curcop = PL_curcop;
487	c->top_env = PL_top_env;
488	}	409	}
489		410
490	/*	411	/*
491	* allocate various perl stacks. This is an exact copy	412	* allocate various perl stacks. This is an exact copy
492	* of perl.c:init_stacks, except that it uses less memory	413	* of perl.c:init_stacks, except that it uses less memory
493	* on the (sometimes correct) assumption that coroutines do	414	* on the (sometimes correct) assumption that coroutines do
494	* not usually need a lot of stackspace.	415	* not usually need a lot of stackspace.
495	*/	416	*/
496	STATIC void	417	#if PREFER_PERL_FUNCTIONS
		418	# define coro_init_stacks init_stacks
		419	#else
		420	static void
497	coro_init_stacks (pTHX)	421	coro_init_stacks ()
498	{	422	{
499	LOCK;
500
501	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
502	PL_curstackinfo->si_type = PERLSI_MAIN;	424	PL_curstackinfo->si_type = PERLSI_MAIN;
503	PL_curstack = PL_curstackinfo->si_stack;	425	PL_curstack = PL_curstackinfo->si_stack;
504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505		427
506	PL_stack_base = AvARRAY(PL_curstack);	428	PL_stack_base = AvARRAY(PL_curstack);
507	PL_stack_sp = PL_stack_base;	429	PL_stack_sp = PL_stack_base;
508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
509		431
510	New(50,PL_tmps_stack,96,SV*);	432	New(50,PL_tmps_stack,128,SV*);
511	PL_tmps_floor = -1;	433	PL_tmps_floor = -1;
512	PL_tmps_ix = -1;	434	PL_tmps_ix = -1;
513	PL_tmps_max = 96;	435	PL_tmps_max = 128;
514		436
515	New(54,PL_markstack,16,I32);	437	New(54,PL_markstack,32,I32);
516	PL_markstack_ptr = PL_markstack;	438	PL_markstack_ptr = PL_markstack;
517	PL_markstack_max = PL_markstack + 16;	439	PL_markstack_max = PL_markstack + 32;
518		440
519	#ifdef SET_MARK_OFFSET	441	#ifdef SET_MARK_OFFSET
520	SET_MARK_OFFSET;	442	SET_MARK_OFFSET;
521	#endif	443	#endif
522		444
523	New(54,PL_scopestack,16,I32);	445	New(54,PL_scopestack,32,I32);
524	PL_scopestack_ix = 0;	446	PL_scopestack_ix = 0;
525	PL_scopestack_max = 16;	447	PL_scopestack_max = 32;
526		448
527	New(54,PL_savestack,96,ANY);	449	New(54,PL_savestack,64,ANY);
528	PL_savestack_ix = 0;	450	PL_savestack_ix = 0;
529	PL_savestack_max = 96;	451	PL_savestack_max = 64;
530		452
531	#if PERL_VERSION < 9	453	#if !PERL_VERSION_ATLEAST (5,9,0)
532	New(54,PL_retstack,8,OP*);	454	New(54,PL_retstack,16,OP*);
533	PL_retstack_ix = 0;	455	PL_retstack_ix = 0;
534	PL_retstack_max = 8;	456	PL_retstack_max = 16;
535	#endif	457	#endif
536
537	UNLOCK;
538	}	458	}
		459	#endif
539		460
540	/*	461	/*
541	* destroy the stacks, the callchain etc...	462	* destroy the stacks, the callchain etc...
542	*/	463	*/
543	STATIC void	464	static void
544	destroy_stacks(pTHX)	465	coro_destroy_stacks ()
545	{	466	{
546	if (!IN_DESTRUCT)	467	if (!IN_DESTRUCT)
547	{	468	{
548	/* is this ugly, I ask? */	469	/* restore all saved variables and stuff */
549	LEAVE_SCOPE (0);	470	LEAVE_SCOPE (0);
		471	assert (PL_tmps_floor == -1);
550		472
551	/* sure it is, but more important: is it correct?? :/ */	473	/* free all temporaries */
552	FREETMPS;	474	FREETMPS;
		475	assert (PL_tmps_ix == -1);
553		476
554	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	477	POPSTACK_TO (PL_mainstack);
555	}	478	}
556		479
557	while (PL_curstackinfo->si_next)	480	while (PL_curstackinfo->si_next)
558	PL_curstackinfo = PL_curstackinfo->si_next;	481	PL_curstackinfo = PL_curstackinfo->si_next;
559		482
560	while (PL_curstackinfo)	483	while (PL_curstackinfo)
561	{	484	{
562	PERL_SI *p = PL_curstackinfo->si_prev;	485	PERL_SI *p = PL_curstackinfo->si_prev;
563		486
564	{ /*D*//*remove*/
565	dSP;
566	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
567	PUTBACK; /* possibly superfluous */
568	}
569
570	if (!IN_DESTRUCT)	487	if (!IN_DESTRUCT)
571	{
572	dounwind (-1);/*D*//*remove*/
573	SvREFCNT_dec (PL_curstackinfo->si_stack);	488	SvREFCNT_dec (PL_curstackinfo->si_stack);
574	}
575		489
576	Safefree (PL_curstackinfo->si_cxstack);	490	Safefree (PL_curstackinfo->si_cxstack);
577	Safefree (PL_curstackinfo);	491	Safefree (PL_curstackinfo);
578	PL_curstackinfo = p;	492	PL_curstackinfo = p;
579	}	493	}
580		494
581	Safefree (PL_tmps_stack);	495	Safefree (PL_tmps_stack);
582	Safefree (PL_markstack);	496	Safefree (PL_markstack);
583	Safefree (PL_scopestack);	497	Safefree (PL_scopestack);
584	Safefree (PL_savestack);	498	Safefree (PL_savestack);
585	#if PERL_VERSION < 9	499	#if !PERL_VERSION_ATLEAST (5,9,0)
586	Safefree (PL_retstack);	500	Safefree (PL_retstack);
587	#endif	501	#endif
588	}	502	}
589		503
590	static void	504	static void
591	allocate_stack (Coro__State ctx, int alloc)	505	setup_coro (struct coro *coro)
592	{
593	coro_stack *stack;
594
595	New (0, stack, 1, coro_stack);
596
597	stack->refcnt = 1;
598	stack->usecnt = 1;
599	stack->gencnt = ctx->gencnt = 0;
600
601	if (alloc)
602	{
603	#if HAVE_MMAP
604	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
605	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
606	if (stack->sptr == (void *)-1)
607	#endif
608	{
609	stack->ssize = - (STACKSIZE * (long)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	{	506	{
647	/*	507	/*
648	* emulate part of the perl startup here.	508	* emulate part of the perl startup here.
649	*/	509	*/
650	dTHX;	510
		511	coro_init_stacks ();
		512
		513	PL_curcop = &PL_compiling;
		514	PL_in_eval = EVAL_NULL;
		515	PL_curpm = 0;
		516	PL_localizing = 0;
		517	PL_dirty = 0;
		518	PL_restartop = 0;
		519
		520	{
		521	dSP;
		522	LOGOP myop;
		523
		524	SvREFCNT_dec (GvAV (PL_defgv));
		525	GvAV (PL_defgv) = coro->args; coro->args = 0;
		526
		527	Zero (&myop, 1, LOGOP);
		528	myop.op_next = Nullop;
		529	myop.op_flags = OPf_WANT_VOID;
		530
		531	PUSHMARK (SP);
		532	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		533	PUTBACK;
		534	PL_op = (OP *)&myop;
		535	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		536	SPAGAIN;
		537	}
		538
		539	ENTER; /* necessary e.g. for dounwind */
		540	}
		541
		542	static void
		543	free_coro_mortal ()
		544	{
		545	if (coro_mortal)
		546	{
		547	SvREFCNT_dec (coro_mortal);
		548	coro_mortal = 0;
		549	}
		550	}
		551
		552	/* inject a fake call to Coro::State::_cctx_init into the execution */
		553	static void NOINLINE
		554	prepare_cctx (coro_cctx *cctx)
		555	{
651	dSP;	556	dSP;
652	Coro__State ctx = (Coro__State)arg;	557	LOGOP myop;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654		558
655	coro_init_stacks (aTHX);	559	Zero (&myop, 1, LOGOP);
656	/*PL_curcop = 0;*/	560	myop.op_next = PL_op;
657	/*PL_in_eval = PL_in_eval;*/ /* inherit */	561	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
658	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660		562
		563	PUSHMARK (SP);
		564	EXTEND (SP, 2);
		565	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		566	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		567	PUTBACK;
		568	PL_op = (OP *)&myop;
		569	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
661	SPAGAIN;	570	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	}	571	}
702		572
703	static void	573	static void
704	continue_coro (void *arg)	574	coro_run (void *arg)
705	{	575	{
		576	/* coro_run is the alternative tail of transfer(), so unlock here. */
		577	UNLOCK;
		578
706	/*	579	/*
707	* this is a _very_ stripped down perl interpreter ;)	580	* this is a _very_ stripped down perl interpreter ;)
708	*/	581	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711
712	PL_top_env = &ctx->start_env;	582	PL_top_env = &PL_start_env;
713		583
714	ctx->cursp = 0;	584	/* inject call to cctx_init */
715	PL_op = PL_op->op_next;	585	prepare_cctx ((coro_cctx *)arg);
716	CALLRUNOPS(aTHX);
717		586
		587	/* somebody will hit me for both perl_run and PL_restartop */
		588	PL_restartop = PL_op;
		589	perl_run (PL_curinterp);
		590
		591	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
718	abort ();	592	abort ();
719	}	593	}
720		594
721	STATIC void	595	static coro_cctx *
		596	cctx_new ()
		597	{
		598	coro_cctx *cctx;
		599
		600	++cctx_count;
		601
		602	Newz (0, cctx, 1, coro_cctx);
		603
		604	#if HAVE_MMAP
		605
		606	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		607	/* mmap supposedly does allocate-on-write for us */
		608	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		609
		610	if (cctx->sptr == (void *)-1)
		611	{
		612	perror ("FATAL: unable to mmap stack for coroutine");
		613	_exit (EXIT_FAILURE);
		614	}
		615
		616	# if STACKGUARD
		617	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		618	# endif
		619
		620	#else
		621
		622	cctx->ssize = STACKSIZE * (long)sizeof (long);
		623	New (0, cctx->sptr, STACKSIZE, long);
		624
		625	if (!cctx->sptr)
		626	{
		627	perror ("FATAL: unable to malloc stack for coroutine");
		628	_exit (EXIT_FAILURE);
		629	}
		630
		631	#endif
		632
		633	#if USE_VALGRIND
		634	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		635	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		636	cctx->ssize + (char *)cctx->sptr
		637	);
		638	#endif
		639
		640	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		641
		642	return cctx;
		643	}
		644
		645	static void
		646	cctx_destroy (coro_cctx *cctx)
		647	{
		648	if (!cctx)
		649	return;
		650
		651	--cctx_count;
		652
		653	#if USE_VALGRIND
		654	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		655	#endif
		656
		657	#if HAVE_MMAP
		658	munmap (cctx->sptr, cctx->ssize);
		659	#else
		660	Safefree (cctx->sptr);
		661	#endif
		662
		663	Safefree (cctx);
		664	}
		665
		666	static coro_cctx *
		667	cctx_get ()
		668	{
		669	coro_cctx *cctx;
		670
		671	if (cctx_first)
		672	{
		673	cctx = cctx_first;
		674	cctx_first = cctx->next;
		675	--cctx_idle;
		676	}
		677	else
		678	{
		679	cctx = cctx_new ();
		680	PL_op = PL_op->op_next;
		681	}
		682
		683	return cctx;
		684	}
		685
		686	static void
		687	cctx_put (coro_cctx *cctx)
		688	{
		689	/* free another cctx if overlimit */
		690	if (cctx_idle >= MAX_IDLE_CCTX)
		691	{
		692	coro_cctx *first = cctx_first;
		693	cctx_first = first->next;
		694	--cctx_idle;
		695
		696	assert (!first->inuse);
		697	cctx_destroy (first);
		698	}
		699
		700	++cctx_idle;
		701	cctx->next = cctx_first;
		702	cctx_first = cctx;
		703	}
		704
		705	/* never call directly, always through the coro_state_transfer global variable */
		706	static void NOINLINE
722	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	707	transfer (struct coro *prev, struct coro *next)
723	{	708	{
724	dSTACKLEVEL;	709	dSTACKLEVEL;
725		710
		711	/* sometimes transfer is only called to set idle_sp */
		712	if (!next)
		713	{
		714	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		715	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		716	}
726	if (prev != next)	717	else if (prev != next)
727	{	718	{
728	if (next->mainstack)	719	coro_cctx *prev__cctx;
		720
		721	if (prev->flags & CF_NEW)
729	{	722	{
730	LOCK;	723	/* create a new empty context */
731	SAVE (prev, flags);	724	Newz (0, prev->cctx, 1, coro_cctx);
732	LOAD (next);	725	prev->cctx->inuse = 1;
733	UNLOCK;	726	prev->flags &= ~CF_NEW;
734		727	prev->flags |= CF_RUNNING;
735	/* mark this state as in-use */
736	next->mainstack = 0;
737	next->tmps_ix = -2;
738
739	/* stacklevel changed? if yes, grab the stack for us! */
740	if (flags & TRANSFER_SAVE_CCTXT)
741	{
742	if (!prev->stack)
743	allocate_stack (prev, 0);
744	else if (prev->cursp != stacklevel
745	&& prev->stack->usecnt > 1)
746	{
747	prev->gencnt = ++prev->stack->gencnt;
748	prev->stack->usecnt = 1;
749	}
750
751	/* has our stack been invalidated? */
752	if (next->stack && next->stack->gencnt != next->gencnt)
753	{
754	deallocate_stack (next);
755	allocate_stack (next, 1);
756	coro_create (&(next->stack->cctx),
757	continue_coro, (void *)next,
758	next->stack->sptr, labs (next->stack->ssize));
759	}
760
761	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
762	prev->cursp = stacklevel;
763	/* don't add any code here */
764	}
765	else
766	next->cursp = stacklevel;
767	}	728	}
768	else if (next->tmps_ix == -2)	729
769	croak ("tried to transfer to running coroutine");	730	/*TODO: must not croak here */
		731	if (!prev->flags & CF_RUNNING)
		732	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		733
		734	if (next->flags & CF_RUNNING)
		735	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		736
		737	if (next->flags & CF_DESTROYED)
		738	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		739
		740	prev->flags &= ~CF_RUNNING;
		741	next->flags |= CF_RUNNING;
		742
		743	LOCK;
		744
		745	if (next->flags & CF_NEW)
		746	{
		747	/* need to start coroutine */
		748	next->flags &= ~CF_NEW;
		749	/* first get rid of the old state */
		750	save_perl (prev);
		751	/* setup coroutine call */
		752	setup_coro (next);
		753	/* need a new stack */
		754	assert (!next->cctx);
		755	}
770	else	756	else
771	{	757	{
772	LOCK;	758	/* coroutine already started */
773	SAVE (prev, -1); /* first get rid of the old state */	759	save_perl (prev);
774	UNLOCK;	760	load_perl (next);
775
776	if (flags & TRANSFER_SAVE_CCTXT)
777	{
778	if (!prev->stack)
779	allocate_stack (prev, 0);
780
781	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
782	{
783	PL_top_env = &next->start_env;
784
785	setup_coro (next);
786	next->cursp = stacklevel;
787
788	prev->stack->refcnt++;
789	prev->stack->usecnt++;
790	next->stack = prev->stack;
791	next->gencnt = prev->gencnt;
792	}
793	else
794	{
795	assert (!next->stack);
796	allocate_stack (next, 1);
797	coro_create (&(next->stack->cctx),
798	setup_coro, (void *)next,
799	next->stack->sptr, labs (next->stack->ssize));
800	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
801	prev->cursp = stacklevel;
802	/* don't add any code here */
803	}
804	}
805	else
806	{
807	setup_coro (next);
808	next->cursp = stacklevel;
809	}
810	}	761	}
811	}
812		762
813	LOCK;	763	prev__cctx = prev->cctx;
814	if (coro_mortal)	764
815	{	765	/* possibly "free" the cctx */
816	SvREFCNT_dec (coro_mortal);	766	if (prev__cctx->idle_sp == STACKLEVEL)
		767	{
		768	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		769	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		770
		771	prev->cctx = 0;
		772
		773	cctx_put (prev__cctx);
		774	prev__cctx->inuse = 0;
		775	}
		776
		777	if (!next->cctx)
		778	{
		779	next->cctx = cctx_get ();
		780	assert (!next->cctx->inuse);
		781	next->cctx->inuse = 1;
		782	}
		783
		784	if (prev__cctx != next->cctx)
		785	{
		786	prev__cctx->top_env = PL_top_env;
		787	PL_top_env = next->cctx->top_env;
		788	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		789	}
		790
817	coro_mortal = 0;	791	free_coro_mortal ();
818	}
819	UNLOCK;	792	UNLOCK;
		793	}
820	}	794	}
821		795
822	#define SV_CORO(sv,func) \	796	struct transfer_args
823	do { \	797	{
824	if (SvROK (sv)) \	798	struct coro *prev, *next;
825	sv = SvRV (sv); \	799	};
826	\
827	if (SvTYPE (sv) == SVt_PVHV) \
828	{ \
829	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
830	\
831	if (!he) \
832	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
833	\
834	(sv) = SvRV (HeVAL(he)); \
835	} \
836	\
837	/* must also be changed inside Coro::Cont::yield */ \
838	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
839	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
840	\
841	} while(0)
842		800
843	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	801	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
844		802
845	static void	803	static int
		804	coro_state_destroy (struct coro *coro)
		805	{
		806	if (coro->refcnt--)
		807	return 0;
		808
		809	if (coro->flags & CF_DESTROYED)
		810	return 0;
		811
		812	coro->flags |= CF_DESTROYED;
		813
		814	if (coro->mainstack && coro->mainstack != main_mainstack)
		815	{
		816	assert (!(coro->flags & CF_RUNNING));
		817
		818	struct coro temp;
		819	Zero (&temp, 1, struct coro);
		820	temp.save = CORO_SAVE_ALL;
		821
		822	if (coro->flags & CF_RUNNING)
		823	croak ("FATAL: tried to destroy currently running coroutine");
		824
		825	save_perl (&temp);
		826	load_perl (coro);
		827
		828	coro_destroy_stacks ();
		829
		830	load_perl (&temp); /* this will get rid of defsv etc.. */
		831
		832	coro->mainstack = 0;
		833	}
		834
		835	cctx_destroy (coro->cctx);
		836	SvREFCNT_dec (coro->args);
		837
		838	return 1;
		839	}
		840
		841	static int
		842	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		843	{
		844	struct coro *coro = (struct coro *)mg->mg_ptr;
		845	mg->mg_ptr = 0;
		846
		847	coro_state_destroy (coro);
		848
		849	if (!coro->refcnt)
		850	Safefree (coro);
		851
		852	return 0;
		853	}
		854
		855	static int
		856	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		857	{
		858	struct coro *coro = (struct coro *)mg->mg_ptr;
		859
		860	++coro->refcnt;
		861
		862	return 0;
		863	}
		864
		865	static MGVTBL coro_state_vtbl = {
		866	0, 0, 0, 0,
		867	coro_state_clear,
		868	0,
		869	#ifdef MGf_DUP
		870	coro_state_dup,
		871	#else
		872	# define MGf_DUP 0
		873	#endif
		874	};
		875
		876	static struct coro *
		877	SvSTATE (SV *coro)
		878	{
		879	HV *stash;
		880	MAGIC *mg;
		881
		882	if (SvROK (coro))
		883	coro = SvRV (coro);
		884
		885	stash = SvSTASH (coro);
		886	if (stash != coro_stash && stash != coro_state_stash)
		887	{
		888	/* very slow, but rare, check */
		889	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		890	croak ("Coro::State object required");
		891	}
		892
		893	mg = SvMAGIC (coro);
		894	assert (mg->mg_type == PERL_MAGIC_ext);
		895	return (struct coro *)mg->mg_ptr;
		896	}
		897
		898	static void
		899	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		900	{
		901	ta->prev = SvSTATE (prev_sv);
		902	ta->next = SvSTATE (next_sv);
		903	}
		904
		905	static void
846	api_transfer(pTHX_ SV *prev, SV *next, int flags)	906	api_transfer (SV *prev_sv, SV *next_sv)
847	{	907	{
848	SV_CORO (prev, "Coro::transfer");	908	struct transfer_args ta;
849	SV_CORO (next, "Coro::transfer");
850		909
851	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	910	prepare_transfer (&ta, prev_sv, next_sv);
		911	TRANSFER (ta);
		912	}
		913
		914	static int
		915	api_save (SV *coro_sv, int new_save)
		916	{
		917	struct coro *coro = SvSTATE (coro_sv);
		918	int old_save = coro->save;
		919
		920	if (new_save >= 0)
		921	coro->save = new_save;
		922
		923	return old_save;
852	}	924	}
853		925
854	/** Coro ********************************************************************/	926	/** Coro ********************************************************************/
855		927
856	#define PRIO_MAX 3	928	#define PRIO_MAX 3
…		…
859	#define PRIO_LOW -1	931	#define PRIO_LOW -1
860	#define PRIO_IDLE -3	932	#define PRIO_IDLE -3
861	#define PRIO_MIN -4	933	#define PRIO_MIN -4
862		934
863	/* for Coro.pm */	935	/* for Coro.pm */
864	static GV *coro_current, *coro_idle;	936	static SV *coro_current;
865	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	937	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
866	static int coro_nready;	938	static int coro_nready;
867		939
868	static void	940	static void
869	coro_enq (pTHX_ SV *sv)	941	coro_enq (SV *coro_sv)
870	{	942	{
871	SV **xprio;
872	int prio;
873
874	if (SvTYPE (sv) != SVt_PVHV)
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
878	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
879
880	prio = prio > PRIO_MAX ? PRIO_MAX
881	: prio < PRIO_MIN ? PRIO_MIN
882	: prio;
883
884	av_push (coro_ready [prio - PRIO_MIN], sv);	943	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
885	coro_nready++;	944	coro_nready++;
886	}	945	}
887		946
888	static SV *	947	static SV *
889	coro_deq (pTHX_ int min_prio)	948	coro_deq (int min_prio)
890	{	949	{
891	int prio = PRIO_MAX - PRIO_MIN;	950	int prio = PRIO_MAX - PRIO_MIN;
892		951
893	min_prio -= PRIO_MIN;	952	min_prio -= PRIO_MIN;
894	if (min_prio < 0)	953	if (min_prio < 0)
895	min_prio = 0;	954	min_prio = 0;
896		955
897	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	956	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
898	if (av_len (coro_ready[prio]) >= 0)	957	if (AvFILLp (coro_ready [prio]) >= 0)
899	{	958	{
900	coro_nready--;	959	coro_nready--;
901	return av_shift (coro_ready[prio]);	960	return av_shift (coro_ready [prio]);
902	}	961	}
903		962
904	return 0;	963	return 0;
905	}	964	}
906		965
907	static void	966	static int
908	api_ready (SV *coro)	967	api_ready (SV *coro_sv)
909	{	968	{
910	dTHX;	969	struct coro *coro;
911		970
912	if (SvROK (coro))	971	if (SvROK (coro_sv))
913	coro = SvRV (coro);	972	coro_sv = SvRV (coro_sv);
		973
		974	coro = SvSTATE (coro_sv);
		975
		976	if (coro->flags & CF_READY)
		977	return 0;
		978
		979	coro->flags |= CF_READY;
914		980
915	LOCK;	981	LOCK;
916	coro_enq (aTHX_ SvREFCNT_inc (coro));	982	coro_enq (SvREFCNT_inc (coro_sv));
917	UNLOCK;	983	UNLOCK;
		984
		985	return 1;
		986	}
		987
		988	static int
		989	api_is_ready (SV *coro_sv)
		990	{
		991	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		992	}
		993
		994	static void
		995	prepare_schedule (struct transfer_args *ta)
		996	{
		997	SV *prev_sv, *next_sv;
		998
		999	for (;;)
		1000	{
		1001	LOCK;
		1002	next_sv = coro_deq (PRIO_MIN);
		1003	UNLOCK;
		1004
		1005	/* nothing to schedule: call the idle handler */
		1006	if (!next_sv)
		1007	{
		1008	dSP;
		1009
		1010	ENTER;
		1011	SAVETMPS;
		1012
		1013	PUSHMARK (SP);
		1014	PUTBACK;
		1015	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1016
		1017	FREETMPS;
		1018	LEAVE;
		1019	continue;
		1020	}
		1021
		1022	ta->next = SvSTATE (next_sv);
		1023
		1024	/* cannot transfer to destroyed coros, skip and look for next */
		1025	if (ta->next->flags & CF_DESTROYED)
		1026	{
		1027	SvREFCNT_dec (next_sv);
		1028	continue;
		1029	}
		1030
		1031	break;
		1032	}
		1033
		1034	/* free this only after the transfer */
		1035	prev_sv = SvRV (coro_current);
		1036	SvRV_set (coro_current, next_sv);
		1037	ta->prev = SvSTATE (prev_sv);
		1038
		1039	assert (ta->next->flags & CF_READY);
		1040	ta->next->flags &= ~CF_READY;
		1041
		1042	LOCK;
		1043	free_coro_mortal ();
		1044	coro_mortal = prev_sv;
		1045	UNLOCK;
		1046	}
		1047
		1048	static void
		1049	prepare_cede (struct transfer_args *ta)
		1050	{
		1051	api_ready (coro_current);
		1052	prepare_schedule (ta);
		1053	}
		1054
		1055	static int
		1056	prepare_cede_notself (struct transfer_args *ta)
		1057	{
		1058	if (coro_nready)
		1059	{
		1060	SV *prev = SvRV (coro_current);
		1061	prepare_schedule (ta);
		1062	api_ready (prev);
		1063	return 1;
		1064	}
		1065	else
		1066	return 0;
918	}	1067	}
919		1068
920	static void	1069	static void
921	api_schedule (void)	1070	api_schedule (void)
922	{	1071	{
923	dTHX;	1072	struct transfer_args ta;
924		1073
925	SV *prev, *next;	1074	prepare_schedule (&ta);
926		1075	TRANSFER (ta);
927	LOCK;
928
929	prev = SvRV (GvSV (coro_current));
930	next = coro_deq (aTHX_ PRIO_MIN);
931
932	if (!next)
933	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
934
935	/* free this only after the transfer */
936	coro_mortal = prev;
937	SV_CORO (prev, "Coro::schedule");
938
939	SvRV (GvSV (coro_current)) = next;
940
941	SV_CORO (next, "Coro::schedule");
942
943	UNLOCK;
944
945	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
946	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
947	}	1076	}
948		1077
949	static void	1078	static int
950	api_cede (void)	1079	api_cede (void)
951	{	1080	{
952	dTHX;	1081	struct transfer_args ta;
953		1082
954	LOCK;	1083	prepare_cede (&ta);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957		1084
958	api_schedule ();	1085	if (ta.prev != ta.next)
		1086	{
		1087	TRANSFER (ta);
		1088	return 1;
		1089	}
		1090	else
		1091	return 0;
		1092	}
		1093
		1094	static int
		1095	api_cede_notself (void)
		1096	{
		1097	struct transfer_args ta;
		1098
		1099	if (prepare_cede_notself (&ta))
		1100	{
		1101	TRANSFER (ta);
		1102	return 1;
		1103	}
		1104	else
		1105	return 0;
959	}	1106	}
960		1107
961	MODULE = Coro::State PACKAGE = Coro::State	1108	MODULE = Coro::State PACKAGE = Coro::State
962		1109
963	PROTOTYPES: ENABLE	1110	PROTOTYPES: DISABLE
964		1111
965	BOOT:	1112	BOOT:
966	{ /* {} necessary for stoopid perl-5.6.x */	1113	{
967	#ifdef USE_ITHREADS	1114	#ifdef USE_ITHREADS
968	MUTEX_INIT (&coro_mutex);	1115	MUTEX_INIT (&coro_mutex);
969	#endif	1116	#endif
		1117	BOOT_PAGESIZE;
970		1118
971	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
972	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
973	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1119	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
974		1120
975	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1121	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
976	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1122	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
977	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1123	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1124	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
978	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1125	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
979		1126
980	main_mainstack = PL_mainstack;	1127	main_mainstack = PL_mainstack;
981		1128
982	coroapi.ver = CORO_API_VERSION;	1129	coroapi.ver = CORO_API_VERSION;
983	coroapi.transfer = api_transfer;	1130	coroapi.transfer = api_transfer;
984	}
985		1131
986	Coro::State	1132	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
987	_newprocess(args)	1133	}
988	SV * args	1134
989	PROTOTYPE: $	1135	SV *
		1136	new (char *klass, ...)
990	CODE:	1137	CODE:
991	Coro__State coro;	1138	{
		1139	struct coro *coro;
		1140	HV *hv;
		1141	int i;
992		1142
993	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
994	croak ("Coro::State::_newprocess expects an arrayref");
995
996	Newz (0, coro, 1, struct coro);	1143	Newz (0, coro, 1, struct coro);
		1144	coro->args = newAV ();
		1145	coro->save = CORO_SAVE_ALL;
		1146	coro->flags = CF_NEW;
997		1147
998	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1148	hv = newHV ();
999	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1149	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1000	/*coro->stack = 0;*/	1150	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1001		1151
1002	/* same as JMPENV_BOOTSTRAP */	1152	for (i = 1; i < items; i++)
1003	/* we might be able to recycle start_env, but safe is safe */	1153	av_push (coro->args, newSVsv (ST (i)));
1004	/*Zero(&coro->start_env, 1, JMPENV);*/	1154	}
1005	coro->start_env.je_ret = -1;
1006	coro->start_env.je_mustcatch = TRUE;
1007
1008	RETVAL = coro;
1009	OUTPUT:	1155	OUTPUT:
1010	RETVAL	1156	RETVAL
1011		1157
		1158	int
		1159	save (SV *coro, int new_save = -1)
		1160	CODE:
		1161	RETVAL = api_save (coro, new_save);
		1162	OUTPUT:
		1163	RETVAL
		1164
1012	void	1165	void
1013	transfer(prev, next, flags)	1166	_set_stacklevel (...)
1014	SV *prev	1167	ALIAS:
1015	SV *next	1168	Coro::State::transfer = 1
1016	int flags	1169	Coro::schedule = 2
1017	PROTOTYPE: @	1170	Coro::cede = 3
		1171	Coro::cede_notself = 4
1018	CODE:	1172	CODE:
1019	PUTBACK;	1173	{
1020	SV_CORO (next, "Coro::transfer");	1174	struct transfer_args ta;
1021	SV_CORO (prev, "Coro::transfer");	1175
1022	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1176	switch (ix)
1023	SPAGAIN;	1177	{
		1178	case 0:
		1179	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1180	ta.next = 0;
		1181	break;
		1182
		1183	case 1:
		1184	if (items != 2)
		1185	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1186
		1187	prepare_transfer (&ta, ST (0), ST (1));
		1188	break;
		1189
		1190	case 2:
		1191	prepare_schedule (&ta);
		1192	break;
		1193
		1194	case 3:
		1195	prepare_cede (&ta);
		1196	break;
		1197
		1198	case 4:
		1199	if (!prepare_cede_notself (&ta))
		1200	XSRETURN_EMPTY;
		1201
		1202	break;
		1203	}
		1204
		1205	BARRIER;
		1206	TRANSFER (ta);
		1207	}
		1208
		1209	bool
		1210	_destroy (SV *coro_sv)
		1211	CODE:
		1212	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1213	OUTPUT:
		1214	RETVAL
1024		1215
1025	void	1216	void
1026	DESTROY(coro)
1027	Coro::State coro
1028	CODE:
1029
1030	if (coro->mainstack && coro->mainstack != main_mainstack)
1031	{
1032	struct coro temp;
1033
1034	PUTBACK;
1035	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1036	LOAD (aTHX_ coro);
1037	SPAGAIN;
1038
1039	destroy_stacks (aTHX);
1040
1041	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1042	SPAGAIN;
1043
1044	coro->mainstack = 0;
1045	}
1046
1047	deallocate_stack (coro);
1048	SvREFCNT_dec (coro->args);
1049	Safefree (coro);
1050
1051	void
1052	_exit(code)	1217	_exit (code)
1053	int code	1218	int code
1054	PROTOTYPE: $	1219	PROTOTYPE: $
1055	CODE:	1220	CODE:
1056	_exit (code);	1221	_exit (code);
1057		1222
1058	MODULE = Coro::State PACKAGE = Coro::Cont	1223	int
		1224	cctx_count ()
		1225	CODE:
		1226	RETVAL = cctx_count;
		1227	OUTPUT:
		1228	RETVAL
1059		1229
1060	# this is slightly dirty (should expose a c-level api)	1230	int
1061		1231	cctx_idle ()
1062	void	1232	CODE:
1063	yield(...)	1233	RETVAL = cctx_idle;
1064	PROTOTYPE: @	1234	OUTPUT:
1065	CODE:	1235	RETVAL
1066	SV *yieldstack;
1067	SV *sv;
1068	AV *defav = GvAV (PL_defgv);
1069	struct coro *prev, *next;
1070
1071	yieldstack = *hv_fetch (
1072	(HV *)SvRV (GvSV (coro_current)),
1073	"yieldstack", sizeof ("yieldstack") - 1,
1074	0
1075	);
1076
1077	/* set up @_ -- ugly */
1078	av_clear (defav);
1079	av_fill (defav, items - 1);
1080	while (items--)
1081	av_store (defav, items, SvREFCNT_inc (ST(items)));
1082
1083	sv = av_pop ((AV *)SvRV (yieldstack));
1084	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1085	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1086	SvREFCNT_dec (sv);
1087
1088	transfer (aTHX_ prev, next, 0);
1089		1236
1090	MODULE = Coro::State PACKAGE = Coro	1237	MODULE = Coro::State PACKAGE = Coro
1091		1238
1092	# this is slightly dirty (should expose a c-level api)
1093
1094	BOOT:	1239	BOOT:
1095	{	1240	{
1096	int i;	1241	int i;
		1242
1097	HV *stash = gv_stashpv ("Coro", TRUE);	1243	coro_stash = gv_stashpv ("Coro", TRUE);
1098		1244
1099	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1245	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1100	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1246	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1101	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1247	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1102	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1248	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1103	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1249	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1104	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1250	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1105		1251
1106	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1252	coro_current = get_sv ("Coro::current", FALSE);
1107	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1253	SvREADONLY_on (coro_current);
1108		1254
1109	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1255	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1110	coro_ready[i] = newAV ();	1256	coro_ready[i] = newAV ();
1111		1257
1112	{	1258	{
1113	SV *sv = perl_get_sv("Coro::API", 1);	1259	SV *sv = perl_get_sv("Coro::API", 1);
1114		1260
1115	coroapi.schedule = api_schedule;	1261	coroapi.schedule = api_schedule;
		1262	coroapi.save = api_save;
1116	coroapi.cede = api_cede;	1263	coroapi.cede = api_cede;
		1264	coroapi.cede_notself = api_cede_notself;
1117	coroapi.ready = api_ready;	1265	coroapi.ready = api_ready;
		1266	coroapi.is_ready = api_is_ready;
1118	coroapi.nready = &coro_nready;	1267	coroapi.nready = &coro_nready;
1119	coroapi.current = coro_current;	1268	coroapi.current = coro_current;
1120		1269
1121	GCoroAPI = &coroapi;	1270	GCoroAPI = &coroapi;
1122	sv_setiv(sv, (IV)&coroapi);	1271	sv_setiv (sv, (IV)&coroapi);
1123	SvREADONLY_on(sv);	1272	SvREADONLY_on (sv);
1124	}	1273	}
1125	}	1274	}
1126		1275
1127	#if !PERL_MICRO
1128
1129	void	1276	void
1130	ready(self)	1277	_set_current (SV *current)
1131	SV * self
1132	PROTOTYPE: $	1278	PROTOTYPE: $
1133	CODE:	1279	CODE:
1134	api_ready (self);	1280	SvREFCNT_dec (SvRV (coro_current));
1135		1281	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1136	#endif
1137		1282
1138	int	1283	int
		1284	prio (Coro::State coro, int newprio = 0)
		1285	ALIAS:
		1286	nice = 1
		1287	CODE:
		1288	{
		1289	RETVAL = coro->prio;
		1290
		1291	if (items > 1)
		1292	{
		1293	if (ix)
		1294	newprio = coro->prio - newprio;
		1295
		1296	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1297	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1298
		1299	coro->prio = newprio;
		1300	}
		1301	}
		1302	OUTPUT:
		1303	RETVAL
		1304
		1305	SV *
		1306	ready (SV *self)
		1307	PROTOTYPE: $
		1308	CODE:
		1309	RETVAL = boolSV (api_ready (self));
		1310	OUTPUT:
		1311	RETVAL
		1312
		1313	SV *
		1314	is_ready (SV *self)
		1315	PROTOTYPE: $
		1316	CODE:
		1317	RETVAL = boolSV (api_is_ready (self));
		1318	OUTPUT:
		1319	RETVAL
		1320
		1321	int
1139	nready(...)	1322	nready (...)
1140	PROTOTYPE:	1323	PROTOTYPE:
1141	CODE:	1324	CODE:
1142	RETVAL = coro_nready;	1325	RETVAL = coro_nready;
1143	OUTPUT:	1326	OUTPUT:
1144	RETVAL	1327	RETVAL
1145		1328
1146	void	1329	MODULE = Coro::State PACKAGE = Coro::AIO
1147	schedule(...)	1330
1148	PROTOTYPE:	1331	SV *
		1332	_get_state ()
1149	CODE:	1333	CODE:
1150	api_schedule ();
1151
1152	void
1153	cede(...)
1154	PROTOTYPE:
1155	CODE:
1156	api_cede ();
1157
1158	# and these are hacks
1159	SV *
1160	_aio_get_state ()
1161	CODE:
1162	{	1334	{
1163	struct {	1335	struct io_state *data;
1164	int errorno;
1165	int laststype;
1166	int laststatval;
1167	Stat_t statcache;
1168	} data;
1169		1336
		1337	RETVAL = newSV (sizeof (struct io_state));
		1338	data = (struct io_state *)SvPVX (RETVAL);
		1339	SvCUR_set (RETVAL, sizeof (struct io_state));
		1340	SvPOK_only (RETVAL);
		1341
1170	data.errorno = errno;	1342	data->errorno = errno;
1171	data.laststype = PL_laststype;	1343	data->laststype = PL_laststype;
1172	data.laststatval = PL_laststatval;	1344	data->laststatval = PL_laststatval;
1173	data.statcache = PL_statcache;	1345	data->statcache = PL_statcache;
1174
1175	RETVAL = newSVpvn ((char *)&data, sizeof data);
1176	}	1346	}
1177	OUTPUT:	1347	OUTPUT:
1178	RETVAL	1348	RETVAL
1179		1349
1180	void	1350	void
1181	_aio_set_state (char *data_)	1351	_set_state (char *data_)
1182	PROTOTYPE: $	1352	PROTOTYPE: $
1183	CODE:	1353	CODE:
1184	{	1354	{
1185	struct {	1355	struct io_state *data = (void *)data_;
1186	int errorno;
1187	int laststype;
1188	int laststatval;
1189	Stat_t statcache;
1190	} *data = (void *)data_;
1191		1356
1192	errno = data->errorno;	1357	errno = data->errorno;
1193	PL_laststype = data->laststype;	1358	PL_laststype = data->laststype;
1194	PL_laststatval = data->laststatval;	1359	PL_laststatval = data->laststatval;
1195	PL_statcache = data->statcache;	1360	PL_statcache = data->statcache;
1196	}	1361	}
		1362

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