ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.62 by root, Tue Feb 22 19:51:58 2005 UTC vs.
Revision 1.134 by root, Thu Jan 4 23:49:27 2007 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libcoro/coro.c"
2		2
3	#include "EXTERN.h"	3	#include "EXTERN.h"
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if PATCHLEVEL < 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)
10	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
12	# endif	52	# endif
13	# ifndef call_sv	53	# ifndef call_sv
14	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
27	# endif	67	# endif
28	#endif	68	#endif
29		69
30	#include "libcoro/coro.c"	70	/* 5.8.7 */
31		71	#ifndef SvRV_set
32	#include <signal.h>	72	# define SvRV_set(s,v) SvRV(s) = (v)
33
34	#ifdef HAVE_MMAP
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;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	112	#else
65	# define LOCK 0	113	# define LOCK (void)0
66	# define UNLOCK 0	114	# define UNLOCK (void)0
67	#endif	115	#endif
		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
68		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	COP *curcop;
134	JMPENV *top_env;
135		165
136	/* data associated with this coroutine (initial args) */	166	/* data associated with this coroutine (initial args) */
137	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;
138	};	185	};
139		186
140	typedef struct coro *Coro__State;	187	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	188	typedef struct coro *Coro__State_or_hashref;
142		189
143	/* mostly copied from op.c:cv_clone2 */	190	static AV *
144	STATIC AV *	191	coro_clone_padlist (CV *cv)
145	clone_padlist (pTHX_ AV *protopadlist)
146	{	192	{
147	AV *av;	193	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV *newpadlist, *newpad_name, *newpad;	194	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		195
166	newpadlist = newAV ();	196	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	197	AvREAL_off (newpadlist);
168	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)));
169	av_store (newpadlist, 1, (SV *) newpad);	207	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		208
240	return newpadlist;	209	return newpadlist;
241	}	210	}
242		211
243	STATIC void	212	static void
244	free_padlist (pTHX_ AV *padlist)	213	free_padlist (AV *padlist)
245	{	214	{
246	/* may be during global destruction */	215	/* may be during global destruction */
247	if (SvREFCNT (padlist))	216	if (SvREFCNT (padlist))
248	{	217	{
249	I32 i = AvFILLp (padlist);	218	I32 i = AvFILLp (padlist);
…		…
262		231
263	SvREFCNT_dec ((SV*)padlist);	232	SvREFCNT_dec ((SV*)padlist);
264	}	233	}
265	}	234	}
266		235
267	STATIC int	236	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	237	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	238	{
270	AV *padlist;	239	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	240	AV *av = (AV *)mg->mg_obj;
272		241
273	/* casting is fun. */	242	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	243	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	244	free_padlist (padlist);
276		245
277	SvREFCNT_dec (av);	246	SvREFCNT_dec (av);
		247
		248	return 0;
278	}	249	}
279		250
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	251	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		252
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	253	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		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
284	/* the next two functions merely cache the padlists */	262	/* the next two functions merely cache the padlists */
285	STATIC void	263	static void
286	get_padlist (pTHX_ CV *cv)	264	get_padlist (CV *cv)
287	{	265	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	MAGIC *mg = CORO_MAGIC (cv);
		267	AV *av;
289		268
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	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
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	280	CvPADLIST (cv) = coro_clone_padlist (cv);
		281	#endif
		282	}
294	}	283	}
295		284
296	STATIC void	285	static void
297	put_padlist (pTHX_ CV *cv)	286	put_padlist (CV *cv)
298	{	287	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
300		290
301	if (!mg)	291	if (!mg)
302	{	292	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	295	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	296	mg->mg_obj = (SV *)newAV ();
307	}	297	}
308		298
309	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);
310	}	305	}
311		306
312	#define SB do {	307	#define SB do {
313	#define SE } while (0)	308	#define SE } while (0)
314		309
315	#define LOAD(state) load_state(aTHX_ (state));
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
317
318	#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
319		311
320	static void	312	static void
321	load_state(pTHX_ Coro__State c)	313	load_perl (Coro__State c)
322	{	314	{
323	PL_dowarn = c->dowarn;	315	#define VAR(name,type) PL_ ## name = c->name;
324	PL_in_eval = c->in_eval;	316	# include "state.h"
325		317	#undef VAR
326	PL_curstackinfo = c->curstackinfo;
327	PL_curstack = c->curstack;
328	PL_mainstack = c->mainstack;
329	PL_stack_sp = c->stack_sp;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		318
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	319	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	320	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	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	}
358		333
359	{	334	{
360	dSP;	335	dSP;
361	CV *cv;	336	CV *cv;
362		337
363	/* now do the ugly restore mess */	338	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	339	while ((cv = (CV *)POPs))
365	{	340	{
366	AV *padlist = (AV *)POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	342	CvDEPTH (cv) = PTR2IV (POPs);
372	}	343	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	344	}
376		345
377	PUTBACK;	346	PUTBACK;
378	}	347	}
379	}	348	}
380		349
381	static void	350	static void
382	save_state(pTHX_ Coro__State c, int flags)	351	save_perl (Coro__State c)
383	{	352	{
384	{	353	{
385	dSP;	354	dSP;
386	I32 cxix = cxstack_ix;	355	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	356	PERL_CONTEXT *ccstk = cxstack;
…		…
390	/*	359	/*
391	* 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
392	* (and reinitialize) all cv's in the whole callchain :(	361	* (and reinitialize) all cv's in the whole callchain :(
393	*/	362	*/
394		363
		364	EXTEND (SP, 3 + 1);
395	PUSHs (Nullsv);	365	PUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	366	/* this loop was inspired by pp_caller */
397	for (;;)	367	for (;;)
398	{	368	{
399	while (cxix >= 0)	369	while (cxix >= 0)
400	{	370	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	371	PERL_CONTEXT *cx = &ccstk[cxix--];
402		372
403	if (CxTYPE(cx) == CXt_SUB)	373	if (CxTYPE (cx) == CXt_SUB)
404	{	374	{
405	CV *cv = cx->blk_sub.cv;	375	CV *cv = cx->blk_sub.cv;
		376
406	if (CvDEPTH(cv))	377	if (CvDEPTH (cv))
407	{	378	{
408	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST (cv));
		381	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	382	PUSHs ((SV *)cv);
419		383
420	get_padlist (aTHX_ cv); /* this is a monster */	384	CvDEPTH (cv) = 0;
		385	get_padlist (cv);
421	}	386	}
422	}	387	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	388	}
432		389
433	if (top_si->si_type == PERLSI_MAIN)	390	if (top_si->si_type == PERLSI_MAIN)
434	break;	391	break;
435		392
…		…
439	}	396	}
440		397
441	PUTBACK;	398	PUTBACK;
442	}	399	}
443		400
444	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;
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	402	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
446	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;
447		405
448	c->dowarn = PL_dowarn;	406	#define VAR(name,type)c->name = PL_ ## name;
449	c->in_eval = PL_in_eval;	407	# include "state.h"
450		408	#undef VAR
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;
455	c->op = PL_op;
456	c->curpad = PL_curpad;
457	c->comppad = PL_comppad;
458	c->compcv = PL_compcv;
459	c->stack_base = PL_stack_base;
460	c->stack_max = PL_stack_max;
461	c->tmps_stack = PL_tmps_stack;
462	c->tmps_floor = PL_tmps_floor;
463	c->tmps_ix = PL_tmps_ix;
464	c->tmps_max = PL_tmps_max;
465	c->markstack = PL_markstack;
466	c->markstack_ptr = PL_markstack_ptr;
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	409	}
480		410
481	/*	411	/*
482	* allocate various perl stacks. This is an exact copy	412	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	413	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	414	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	415	* not usually need a lot of stackspace.
486	*/	416	*/
487	STATIC void	417	#if PREFER_PERL_FUNCTIONS
		418	# define coro_init_stacks init_stacks
		419	#else
		420	static void
488	coro_init_stacks (pTHX)	421	coro_init_stacks ()
489	{	422	{
490	LOCK;
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
493	PL_curstackinfo->si_type = PERLSI_MAIN;	424	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	425	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		427
497	PL_stack_base = AvARRAY(PL_curstack);	428	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	429	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		431
501	New(50,PL_tmps_stack,96,SV*);	432	New(50,PL_tmps_stack,128,SV*);
502	PL_tmps_floor = -1;	433	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	434	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	435	PL_tmps_max = 128;
505		436
506	New(54,PL_markstack,16,I32);	437	New(54,PL_markstack,32,I32);
507	PL_markstack_ptr = PL_markstack;	438	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	439	PL_markstack_max = PL_markstack + 32;
509		440
510	#ifdef SET_MARK_OFFSET	441	#ifdef SET_MARK_OFFSET
511	SET_MARK_OFFSET;	442	SET_MARK_OFFSET;
512	#endif	443	#endif
513		444
514	New(54,PL_scopestack,16,I32);	445	New(54,PL_scopestack,32,I32);
515	PL_scopestack_ix = 0;	446	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	447	PL_scopestack_max = 32;
517		448
518	New(54,PL_savestack,96,ANY);	449	New(54,PL_savestack,64,ANY);
519	PL_savestack_ix = 0;	450	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	451	PL_savestack_max = 64;
521		452
		453	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	454	New(54,PL_retstack,16,OP*);
523	PL_retstack_ix = 0;	455	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	456	PL_retstack_max = 16;
525		457	#endif
526	UNLOCK;
527	}	458	}
		459	#endif
528		460
529	/*	461	/*
530	* destroy the stacks, the callchain etc...	462	* destroy the stacks, the callchain etc...
531	*/	463	*/
532	STATIC void	464	static void
533	destroy_stacks(pTHX)	465	coro_destroy_stacks ()
534	{	466	{
535	if (!IN_DESTRUCT)	467	if (!IN_DESTRUCT)
536	{	468	{
537	/* is this ugly, I ask? */	469	/* restore all saved variables and stuff */
538	LEAVE_SCOPE (0);	470	LEAVE_SCOPE (0);
		471	assert (PL_tmps_floor == -1);
539		472
540	/* sure it is, but more important: is it correct?? :/ */	473	/* free all temporaries */
541	FREETMPS;	474	FREETMPS;
		475	assert (PL_tmps_ix == -1);
542		476
		477	/* unwind all extra stacks */
543	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	478	POPSTACK_TO (PL_mainstack);
		479
		480	/* unwind main stack */
		481	dounwind (-1);
544	}	482	}
545		483
546	while (PL_curstackinfo->si_next)	484	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	485	PL_curstackinfo = PL_curstackinfo->si_next;
548		486
549	while (PL_curstackinfo)	487	while (PL_curstackinfo)
550	{	488	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	489	PERL_SI *p = PL_curstackinfo->si_prev;
552		490
553	{ /*D*//*remove*/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/*D*//*remove*/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	492	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		493
565	Safefree (PL_curstackinfo->si_cxstack);	494	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	495	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	496	PL_curstackinfo = p;
568	}	497	}
569		498
570	Safefree (PL_tmps_stack);	499	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	500	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	501	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	502	Safefree (PL_savestack);
		503	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	504	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	505	#endif
595	{
596	/*FIXME*//*D*//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}	506	}
606		507
607	static void	508	static void
608	deallocate_stack (Coro__State ctx)	509	setup_coro (struct coro *coro)
609	{
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void
633	setup_coro (void *arg)
634	{	510	{
635	/*	511	/*
636	* emulate part of the perl startup here.	512	* emulate part of the perl startup here.
637	*/	513	*/
638	dTHX;	514
		515	coro_init_stacks ();
		516
		517	PL_curcop = &PL_compiling;
		518	PL_in_eval = EVAL_NULL;
		519	PL_curpm = 0;
		520	PL_localizing = 0;
		521	PL_dirty = 0;
		522	PL_restartop = 0;
		523
		524	{
		525	dSP;
		526	LOGOP myop;
		527
		528	SvREFCNT_dec (GvAV (PL_defgv));
		529	GvAV (PL_defgv) = coro->args; coro->args = 0;
		530
		531	Zero (&myop, 1, LOGOP);
		532	myop.op_next = Nullop;
		533	myop.op_flags = OPf_WANT_VOID;
		534
		535	PUSHMARK (SP);
		536	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		537	PUTBACK;
		538	PL_op = (OP *)&myop;
		539	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		540	SPAGAIN;
		541	}
		542
		543	ENTER; /* necessary e.g. for dounwind */
		544	}
		545
		546	static void
		547	free_coro_mortal ()
		548	{
		549	if (coro_mortal)
		550	{
		551	SvREFCNT_dec (coro_mortal);
		552	coro_mortal = 0;
		553	}
		554	}
		555
		556	/* inject a fake call to Coro::State::_cctx_init into the execution */
		557	static void NOINLINE
		558	prepare_cctx (coro_cctx *cctx)
		559	{
639	dSP;	560	dSP;
640	Coro__State ctx = (Coro__State)arg;	561	LOGOP myop;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		562
643	coro_init_stacks (aTHX);	563	Zero (&myop, 1, LOGOP);
644	/*PL_curcop = 0;*/	564	myop.op_next = PL_op;
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */	565	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
646	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648		566
		567	PUSHMARK (SP);
		568	EXTEND (SP, 2);
		569	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		570	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		571	PUTBACK;
		572	PL_op = (OP *)&myop;
		573	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;	574	SPAGAIN;
650
651	if (ctx->stack)
652	{
653	ctx->cursp = 0;
654
655	PUSHMARK(SP);
656	PUTBACK;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659	if (SvTRUE (ERRSV))
660	croak (NULL);
661	else
662	croak ("FATAL: CCTXT coroutine returned!");
663	}
664	else
665	{
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}
689	}	575	}
690		576
691	static void	577	static void
692	continue_coro (void *arg)	578	coro_run (void *arg)
693	{	579	{
		580	/* coro_run is the alternative tail of transfer(), so unlock here. */
		581	UNLOCK;
		582
694	/*	583	/*
695	* this is a _very_ stripped down perl interpreter ;)	584	* this is a _very_ stripped down perl interpreter ;)
696	*/	585	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700
701	PL_top_env = &ctx->start_env;	586	PL_top_env = &PL_start_env;
702		587
703	ctx->cursp = 0;	588	/* inject call to cctx_init */
704	PL_op = PL_op->op_next;	589	prepare_cctx ((coro_cctx *)arg);
705	CALLRUNOPS(aTHX);
706		590
		591	/* somebody will hit me for both perl_run and PL_restartop */
		592	PL_restartop = PL_op;
		593	perl_run (PL_curinterp);
		594
		595	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
707	abort ();	596	abort ();
708	}	597	}
709		598
710	STATIC void	599	static coro_cctx *
		600	cctx_new ()
		601	{
		602	coro_cctx *cctx;
		603
		604	++cctx_count;
		605
		606	Newz (0, cctx, 1, coro_cctx);
		607
		608	#if HAVE_MMAP
		609
		610	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		611	/* mmap supposedly does allocate-on-write for us */
		612	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		613
		614	if (cctx->sptr == (void *)-1)
		615	{
		616	perror ("FATAL: unable to mmap stack for coroutine");
		617	_exit (EXIT_FAILURE);
		618	}
		619
		620	# if STACKGUARD
		621	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		622	# endif
		623
		624	#else
		625
		626	cctx->ssize = STACKSIZE * (long)sizeof (long);
		627	New (0, cctx->sptr, STACKSIZE, long);
		628
		629	if (!cctx->sptr)
		630	{
		631	perror ("FATAL: unable to malloc stack for coroutine");
		632	_exit (EXIT_FAILURE);
		633	}
		634
		635	#endif
		636
		637	#if USE_VALGRIND
		638	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		639	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		640	cctx->ssize + (char *)cctx->sptr
		641	);
		642	#endif
		643
		644	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		645
		646	return cctx;
		647	}
		648
		649	static void
		650	cctx_destroy (coro_cctx *cctx)
		651	{
		652	if (!cctx)
		653	return;
		654
		655	--cctx_count;
		656
		657	#if USE_VALGRIND
		658	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		659	#endif
		660
		661	#if HAVE_MMAP
		662	munmap (cctx->sptr, cctx->ssize);
		663	#else
		664	Safefree (cctx->sptr);
		665	#endif
		666
		667	Safefree (cctx);
		668	}
		669
		670	static coro_cctx *
		671	cctx_get ()
		672	{
		673	coro_cctx *cctx;
		674
		675	if (cctx_first)
		676	{
		677	cctx = cctx_first;
		678	cctx_first = cctx->next;
		679	--cctx_idle;
		680	}
		681	else
		682	{
		683	cctx = cctx_new ();
		684	PL_op = PL_op->op_next;
		685	}
		686
		687	return cctx;
		688	}
		689
		690	static void
		691	cctx_put (coro_cctx *cctx)
		692	{
		693	/* free another cctx if overlimit */
		694	if (cctx_idle >= MAX_IDLE_CCTX)
		695	{
		696	coro_cctx *first = cctx_first;
		697	cctx_first = first->next;
		698	--cctx_idle;
		699
		700	assert (!first->inuse);
		701	cctx_destroy (first);
		702	}
		703
		704	++cctx_idle;
		705	cctx->next = cctx_first;
		706	cctx_first = cctx;
		707	}
		708
		709	/* never call directly, always through the coro_state_transfer global variable */
		710	static void NOINLINE
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	711	transfer (struct coro *prev, struct coro *next)
712	{	712	{
713	dSTACKLEVEL;	713	dSTACKLEVEL;
714		714
		715	/* sometimes transfer is only called to set idle_sp */
		716	if (!next)
		717	{
		718	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		719	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		720	}
715	if (prev != next)	721	else if (prev != next)
716	{	722	{
717	if (next->mainstack)	723	coro_cctx *prev__cctx;
		724
		725	if (prev->flags & CF_NEW)
718	{	726	{
719	LOCK;	727	/* create a new empty context */
720	SAVE (prev, flags);	728	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	729	prev->cctx->inuse = 1;
722	UNLOCK;	730	prev->flags &= ~CF_NEW;
723		731	prev->flags |= CF_RUNNING;
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}	732	}
757	else if (next->tmps_ix == -2)	733
758	croak ("tried to transfer to running coroutine");	734	/*TODO: must not croak here */
		735	if (!prev->flags & CF_RUNNING)
		736	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		737
		738	if (next->flags & CF_RUNNING)
		739	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		740
		741	if (next->flags & CF_DESTROYED)
		742	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		743
		744	prev->flags &= ~CF_RUNNING;
		745	next->flags |= CF_RUNNING;
		746
		747	LOCK;
		748
		749	if (next->flags & CF_NEW)
		750	{
		751	/* need to start coroutine */
		752	next->flags &= ~CF_NEW;
		753	/* first get rid of the old state */
		754	save_perl (prev);
		755	/* setup coroutine call */
		756	setup_coro (next);
		757	/* need a new stack */
		758	assert (!next->cctx);
		759	}
759	else	760	else
760	{	761	{
761	LOCK;	762	/* coroutine already started */
762	SAVE (prev, -1); /* first get rid of the old state */	763	save_perl (prev);
763	UNLOCK;	764	load_perl (next);
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}	765	}
800	}
801		766
802	LOCK;	767	prev__cctx = prev->cctx;
803	if (coro_mortal)	768
804	{	769	/* possibly "free" the cctx */
805	SvREFCNT_dec (coro_mortal);	770	if (prev__cctx->idle_sp == STACKLEVEL)
		771	{
		772	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		773	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		774
		775	prev->cctx = 0;
		776
		777	cctx_put (prev__cctx);
		778	prev__cctx->inuse = 0;
		779	}
		780
		781	if (!next->cctx)
		782	{
		783	next->cctx = cctx_get ();
		784	assert (!next->cctx->inuse);
		785	next->cctx->inuse = 1;
		786	}
		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
806	coro_mortal = 0;	795	free_coro_mortal ();
807	}
808	UNLOCK;	796	UNLOCK;
		797	}
809	}	798	}
810		799
811	#define SV_CORO(sv,func) \	800	struct transfer_args
812	do { \	801	{
813	if (SvROK (sv)) \	802	struct coro *prev, *next;
814	sv = SvRV (sv); \	803	};
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		804
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	805	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
833		806
834	static void	807	static int
		808	coro_state_destroy (struct coro *coro)
		809	{
		810	if (coro->flags & CF_DESTROYED)
		811	return 0;
		812
		813	coro->flags |= CF_DESTROYED;
		814
		815	if (coro->mainstack && coro->mainstack != main_mainstack)
		816	{
		817	assert (!(coro->flags & CF_RUNNING));
		818
		819	struct coro temp;
		820	Zero (&temp, 1, struct coro);
		821	temp.save = CORO_SAVE_ALL;
		822
		823	if (coro->flags & CF_RUNNING)
		824	croak ("FATAL: tried to destroy currently running coroutine");
		825
		826	save_perl (&temp);
		827	load_perl (coro);
		828
		829	coro_destroy_stacks ();
		830
		831	load_perl (&temp); /* this will get rid of defsv etc.. */
		832
		833	coro->mainstack = 0;
		834	}
		835
		836	cctx_destroy (coro->cctx);
		837	SvREFCNT_dec (coro->args);
		838
		839	return 1;
		840	}
		841
		842	static int
		843	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		844	{
		845	struct coro *coro = (struct coro *)mg->mg_ptr;
		846	mg->mg_ptr = 0;
		847
		848	if (--coro->refcnt < 0)
		849	{
		850	coro_state_destroy (coro);
		851	Safefree (coro);
		852	}
		853
		854	return 0;
		855	}
		856
		857	static int
		858	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		859	{
		860	struct coro *coro = (struct coro *)mg->mg_ptr;
		861
		862	++coro->refcnt;
		863
		864	return 0;
		865	}
		866
		867	static MGVTBL coro_state_vtbl = {
		868	0, 0, 0, 0,
		869	coro_state_free,
		870	0,
		871	#ifdef MGf_DUP
		872	coro_state_dup,
		873	#else
		874	# define MGf_DUP 0
		875	#endif
		876	};
		877
		878	static struct coro *
		879	SvSTATE (SV *coro)
		880	{
		881	HV *stash;
		882	MAGIC *mg;
		883
		884	if (SvROK (coro))
		885	coro = SvRV (coro);
		886
		887	stash = SvSTASH (coro);
		888	if (stash != coro_stash && stash != coro_state_stash)
		889	{
		890	/* very slow, but rare, check */
		891	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		892	croak ("Coro::State object required");
		893	}
		894
		895	mg = SvMAGIC (coro);
		896	assert (mg->mg_type == PERL_MAGIC_ext);
		897	return (struct coro *)mg->mg_ptr;
		898	}
		899
		900	static void
		901	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		902	{
		903	ta->prev = SvSTATE (prev_sv);
		904	ta->next = SvSTATE (next_sv);
		905	}
		906
		907	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	908	api_transfer (SV *prev_sv, SV *next_sv)
836	{	909	{
837	SV_CORO (prev, "Coro::transfer");	910	struct transfer_args ta;
838	SV_CORO (next, "Coro::transfer");
839		911
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	912	prepare_transfer (&ta, prev_sv, next_sv);
		913	TRANSFER (ta);
		914	}
		915
		916	static int
		917	api_save (SV *coro_sv, int new_save)
		918	{
		919	struct coro *coro = SvSTATE (coro_sv);
		920	int old_save = coro->save;
		921
		922	if (new_save >= 0)
		923	coro->save = new_save;
		924
		925	return old_save;
841	}	926	}
842		927
843	/** Coro ********************************************************************/	928	/** Coro ********************************************************************/
844		929
845	#define PRIO_MAX 3	930	#define PRIO_MAX 3
…		…
848	#define PRIO_LOW -1	933	#define PRIO_LOW -1
849	#define PRIO_IDLE -3	934	#define PRIO_IDLE -3
850	#define PRIO_MIN -4	935	#define PRIO_MIN -4
851		936
852	/* for Coro.pm */	937	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;	938	static SV *coro_current;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	939	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;	940	static int coro_nready;
856		941
857	static void	942	static void
858	coro_enq (pTHX_ SV *sv)	943	coro_enq (SV *coro_sv)
859	{	944	{
860	if (SvTYPE (sv) == SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);	945	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870	coro_nready++;	946	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}	947	}
877		948
878	static SV *	949	static SV *
879	coro_deq (pTHX_ int min_prio)	950	coro_deq (int min_prio)
880	{	951	{
881	int prio = PRIO_MAX - PRIO_MIN;	952	int prio = PRIO_MAX - PRIO_MIN;
882		953
883	min_prio -= PRIO_MIN;	954	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	955	if (min_prio < 0)
885	min_prio = 0;	956	min_prio = 0;
886		957
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	958	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	959	if (AvFILLp (coro_ready [prio]) >= 0)
889	{	960	{
890	coro_nready--;	961	coro_nready--;
891	return av_shift (coro_ready[prio]);	962	return av_shift (coro_ready [prio]);
892	}	963	}
893		964
894	return 0;	965	return 0;
895	}	966	}
896		967
897	static void	968	static int
898	api_ready (SV *coro)	969	api_ready (SV *coro_sv)
899	{	970	{
900	dTHX;	971	struct coro *coro;
901		972
902	if (SvROK (coro))	973	if (SvROK (coro_sv))
903	coro = SvRV (coro);	974	coro_sv = SvRV (coro_sv);
		975
		976	coro = SvSTATE (coro_sv);
		977
		978	if (coro->flags & CF_READY)
		979	return 0;
		980
		981	coro->flags |= CF_READY;
904		982
905	LOCK;	983	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	984	coro_enq (SvREFCNT_inc (coro_sv));
907	UNLOCK;	985	UNLOCK;
		986
		987	return 1;
		988	}
		989
		990	static int
		991	api_is_ready (SV *coro_sv)
		992	{
		993	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		994	}
		995
		996	static void
		997	prepare_schedule (struct transfer_args *ta)
		998	{
		999	SV *prev_sv, *next_sv;
		1000
		1001	for (;;)
		1002	{
		1003	LOCK;
		1004	next_sv = coro_deq (PRIO_MIN);
		1005	UNLOCK;
		1006
		1007	/* nothing to schedule: call the idle handler */
		1008	if (!next_sv)
		1009	{
		1010	dSP;
		1011
		1012	ENTER;
		1013	SAVETMPS;
		1014
		1015	PUSHMARK (SP);
		1016	PUTBACK;
		1017	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1018
		1019	FREETMPS;
		1020	LEAVE;
		1021	continue;
		1022	}
		1023
		1024	ta->next = SvSTATE (next_sv);
		1025
		1026	/* cannot transfer to destroyed coros, skip and look for next */
		1027	if (ta->next->flags & CF_DESTROYED)
		1028	{
		1029	SvREFCNT_dec (next_sv);
		1030	continue;
		1031	}
		1032
		1033	break;
		1034	}
		1035
		1036	/* free this only after the transfer */
		1037	prev_sv = SvRV (coro_current);
		1038	SvRV_set (coro_current, next_sv);
		1039	ta->prev = SvSTATE (prev_sv);
		1040
		1041	assert (ta->next->flags & CF_READY);
		1042	ta->next->flags &= ~CF_READY;
		1043
		1044	LOCK;
		1045	free_coro_mortal ();
		1046	coro_mortal = prev_sv;
		1047	UNLOCK;
		1048	}
		1049
		1050	static void
		1051	prepare_cede (struct transfer_args *ta)
		1052	{
		1053	api_ready (coro_current);
		1054	prepare_schedule (ta);
		1055	}
		1056
		1057	static int
		1058	prepare_cede_notself (struct transfer_args *ta)
		1059	{
		1060	if (coro_nready)
		1061	{
		1062	SV *prev = SvRV (coro_current);
		1063	prepare_schedule (ta);
		1064	api_ready (prev);
		1065	return 1;
		1066	}
		1067	else
		1068	return 0;
908	}	1069	}
909		1070
910	static void	1071	static void
911	api_schedule (void)	1072	api_schedule (void)
912	{	1073	{
913	dTHX;	1074	struct transfer_args ta;
914		1075
915	SV *prev, *next;	1076	prepare_schedule (&ta);
916		1077	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1078	}
938		1079
939	static void	1080	static int
940	api_cede (void)	1081	api_cede (void)
941	{	1082	{
942	dTHX;	1083	struct transfer_args ta;
943		1084
944	LOCK;	1085	prepare_cede (&ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1086
948	api_schedule ();	1087	if (ta.prev != ta.next)
		1088	{
		1089	TRANSFER (ta);
		1090	return 1;
		1091	}
		1092	else
		1093	return 0;
		1094	}
		1095
		1096	static int
		1097	api_cede_notself (void)
		1098	{
		1099	struct transfer_args ta;
		1100
		1101	if (prepare_cede_notself (&ta))
		1102	{
		1103	TRANSFER (ta);
		1104	return 1;
		1105	}
		1106	else
		1107	return 0;
949	}	1108	}
950		1109
951	MODULE = Coro::State PACKAGE = Coro::State	1110	MODULE = Coro::State PACKAGE = Coro::State
952		1111
953	PROTOTYPES: ENABLE	1112	PROTOTYPES: DISABLE
954		1113
955	BOOT:	1114	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1115	{
957	#ifdef USE_ITHREADS	1116	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1117	MUTEX_INIT (&coro_mutex);
959	#endif	1118	#endif
		1119	BOOT_PAGESIZE;
960		1120
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1121	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1122
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1123	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1125	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1126	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1127	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
969		1128
970	main_mainstack = PL_mainstack;	1129	main_mainstack = PL_mainstack;
971		1130
972	coroapi.ver = CORO_API_VERSION;	1131	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1132	coroapi.transfer = api_transfer;
974	}
975		1133
976	Coro::State	1134	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1135	}
978	SV * args	1136
979	PROTOTYPE: $	1137	SV *
		1138	new (char *klass, ...)
980	CODE:	1139	CODE:
981	Coro__State coro;	1140	{
		1141	struct coro *coro;
		1142	HV *hv;
		1143	int i;
982		1144
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1145	Newz (0, coro, 1, struct coro);
		1146	coro->args = newAV ();
		1147	coro->save = CORO_SAVE_ALL;
		1148	coro->flags = CF_NEW;
987		1149
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1150	hv = newHV ();
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1151	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
990	/*coro->stack = 0;*/	1152	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991		1153
992	/* same as JMPENV_BOOTSTRAP */	1154	for (i = 1; i < items; i++)
993	/* we might be able to recycle start_env, but safe is safe */	1155	av_push (coro->args, newSVsv (ST (i)));
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1156	}
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997
998	RETVAL = coro;
999	OUTPUT:	1157	OUTPUT:
1000	RETVAL	1158	RETVAL
1001		1159
		1160	int
		1161	save (SV *coro, int new_save = -1)
		1162	CODE:
		1163	RETVAL = api_save (coro, new_save);
		1164	OUTPUT:
		1165	RETVAL
		1166
1002	void	1167	void
1003	transfer(prev, next, flags)	1168	_set_stacklevel (...)
1004	SV *prev	1169	ALIAS:
1005	SV *next	1170	Coro::State::transfer = 1
1006	int flags	1171	Coro::schedule = 2
1007	PROTOTYPE: @	1172	Coro::cede = 3
		1173	Coro::cede_notself = 4
1008	CODE:	1174	CODE:
1009	PUTBACK;	1175	{
1010	SV_CORO (next, "Coro::transfer");	1176	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1177
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1178	switch (ix)
1013	SPAGAIN;	1179	{
		1180	case 0:
		1181	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1182	ta.next = 0;
		1183	break;
		1184
		1185	case 1:
		1186	if (items != 2)
		1187	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1188
		1189	prepare_transfer (&ta, ST (0), ST (1));
		1190	break;
		1191
		1192	case 2:
		1193	prepare_schedule (&ta);
		1194	break;
		1195
		1196	case 3:
		1197	prepare_cede (&ta);
		1198	break;
		1199
		1200	case 4:
		1201	if (!prepare_cede_notself (&ta))
		1202	XSRETURN_EMPTY;
		1203
		1204	break;
		1205	}
		1206
		1207	BARRIER;
		1208	TRANSFER (ta);
		1209	}
		1210
		1211	bool
		1212	_destroy (SV *coro_sv)
		1213	CODE:
		1214	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1215	OUTPUT:
		1216	RETVAL
1014		1217
1015	void	1218	void
1016	DESTROY(coro)
1017	Coro::State coro
1018	CODE:
1019
1020	if (coro->mainstack && coro->mainstack != main_mainstack)
1021	{
1022	struct coro temp;
1023
1024	PUTBACK;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026	LOAD (aTHX_ coro);
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040
1041	void
1042	_exit(code)	1219	_exit (code)
1043	int code	1220	int code
1044	PROTOTYPE: $	1221	PROTOTYPE: $
1045	CODE:	1222	CODE:
1046	_exit (code);	1223	_exit (code);
1047		1224
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1225	int
		1226	cctx_count ()
		1227	CODE:
		1228	RETVAL = cctx_count;
		1229	OUTPUT:
		1230	RETVAL
1049		1231
1050	# this is slightly dirty (should expose a c-level api)	1232	int
1051		1233	cctx_idle ()
1052	void	1234	CODE:
1053	yield(...)	1235	RETVAL = cctx_idle;
1054	PROTOTYPE: @	1236	OUTPUT:
1055	CODE:	1237	RETVAL
1056	static SV *returnstk;
1057	SV *sv;
1058	AV *defav = GvAV (PL_defgv);
1059	struct coro *prev, *next;
1060
1061	if (!returnstk)
1062	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064	/* set up @_ -- ugly */
1065	av_clear (defav);
1066	av_fill (defav, items - 1);
1067	while (items--)
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071	sv = av_pop ((AV *)SvRV (returnstk));
1072	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074	SvREFCNT_dec (sv);
1075
1076	transfer (aTHX_ prev, next, 0);
1077		1238
1078	MODULE = Coro::State PACKAGE = Coro	1239	MODULE = Coro::State PACKAGE = Coro
1079		1240
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1241	BOOT:
1083	{	1242	{
1084	int i;	1243	int i;
		1244
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1245	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1246
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1247	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1248	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1249	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1250	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1251	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1252	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093		1253
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1254	coro_current = get_sv ("Coro::current", FALSE);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1255	SvREADONLY_on (coro_current);
1096		1256
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1257	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098	coro_ready[i] = newAV ();	1258	coro_ready[i] = newAV ();
1099		1259
1100	{	1260	{
1101	SV *sv = perl_get_sv("Coro::API", 1);	1261	SV *sv = perl_get_sv("Coro::API", 1);
1102		1262
1103	coroapi.schedule = api_schedule;	1263	coroapi.schedule = api_schedule;
		1264	coroapi.save = api_save;
1104	coroapi.cede = api_cede;	1265	coroapi.cede = api_cede;
		1266	coroapi.cede_notself = api_cede_notself;
1105	coroapi.ready = api_ready;	1267	coroapi.ready = api_ready;
		1268	coroapi.is_ready = api_is_ready;
1106	coroapi.nready = &coro_nready;	1269	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1270	coroapi.current = coro_current;
1108		1271
1109	GCoroAPI = &coroapi;	1272	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1273	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1274	SvREADONLY_on (sv);
1112	}	1275	}
1113	}	1276	}
1114		1277
1115	#if !PERL_MICRO
1116
1117	void	1278	void
1118	ready(self)	1279	_set_current (SV *current)
1119	SV * self
1120	PROTOTYPE: $	1280	PROTOTYPE: $
1121	CODE:	1281	CODE:
1122	api_ready (self);	1282	SvREFCNT_dec (SvRV (coro_current));
1123		1283	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1124	#endif
1125		1284
1126	int	1285	int
		1286	prio (Coro::State coro, int newprio = 0)
		1287	ALIAS:
		1288	nice = 1
		1289	CODE:
		1290	{
		1291	RETVAL = coro->prio;
		1292
		1293	if (items > 1)
		1294	{
		1295	if (ix)
		1296	newprio = coro->prio - newprio;
		1297
		1298	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1299	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1300
		1301	coro->prio = newprio;
		1302	}
		1303	}
		1304	OUTPUT:
		1305	RETVAL
		1306
		1307	SV *
		1308	ready (SV *self)
		1309	PROTOTYPE: $
		1310	CODE:
		1311	RETVAL = boolSV (api_ready (self));
		1312	OUTPUT:
		1313	RETVAL
		1314
		1315	SV *
		1316	is_ready (SV *self)
		1317	PROTOTYPE: $
		1318	CODE:
		1319	RETVAL = boolSV (api_is_ready (self));
		1320	OUTPUT:
		1321	RETVAL
		1322
		1323	int
1127	nready(...)	1324	nready (...)
1128	PROTOTYPE:	1325	PROTOTYPE:
1129	CODE:	1326	CODE:
1130	RETVAL = coro_nready;	1327	RETVAL = coro_nready;
1131	OUTPUT:	1328	OUTPUT:
1132	RETVAL	1329	RETVAL
1133		1330
		1331	MODULE = Coro::State PACKAGE = Coro::AIO
		1332
		1333	SV *
		1334	_get_state ()
		1335	CODE:
		1336	{
		1337	struct io_state *data;
		1338
		1339	RETVAL = newSV (sizeof (struct io_state));
		1340	data = (struct io_state *)SvPVX (RETVAL);
		1341	SvCUR_set (RETVAL, sizeof (struct io_state));
		1342	SvPOK_only (RETVAL);
		1343
		1344	data->errorno = errno;
		1345	data->laststype = PL_laststype;
		1346	data->laststatval = PL_laststatval;
		1347	data->statcache = PL_statcache;
		1348	}
		1349	OUTPUT:
		1350	RETVAL
		1351
1134	void	1352	void
1135	schedule(...)	1353	_set_state (char *data_)
1136	PROTOTYPE:	1354	PROTOTYPE: $
1137	CODE:	1355	CODE:
1138	api_schedule ();	1356	{
		1357	struct io_state *data = (void *)data_;
1139		1358
1140	void	1359	errno = data->errorno;
1141	cede(...)	1360	PL_laststype = data->laststype;
1142	PROTOTYPE:	1361	PL_laststatval = data->laststatval;
1143	CODE:	1362	PL_statcache = data->statcache;
1144	api_cede ();	1363	}
1145		1364

Diff Legend

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