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Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.149 by root, Sat Apr 14 15:06:05 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
		10
		11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
8		47
9	#define PERL_VERSION_ATLEAST(a,b,c) \	48	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	49	(PERL_REVISION > (a) \
11	|| (PERL_REVISION == (a) \	50	|| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	51	&& (PERL_VERSION > (b) \
…		…
31	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
33	# endif	72	# endif
34	#endif	73	#endif
35		74
36	#include <stdio.h>	75	/* 5.8.7 */
37	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
38		79
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	81	# undef CORO_STACKGUARD
41	#endif
42
43	#ifndef STACKGUARD
44	# define STACKGUARD 0
45	#endif
46
47	#ifdef HAVE_MMAP
48	# include <unistd.h>
49	# include <sys/mman.h>
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif	82	#endif
57	# include <limits.h>	83
58	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
59	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
65	#endif	91	#endif
66		92
67	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
68	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
69	* and should be unique. */	95	* and should be unique. */
…		…
72		98
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		100
75	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
76	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
77	#else	104	#else
78	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
79	#endif	107	#endif
80		108
81	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
82		110
83	#include "CoroAPI.h"	111	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		112
87	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	117	#else
92	# define LOCK (void)0	118	# define LOCK (void)0
93	# define UNLOCK (void)0	119	# define UNLOCK (void)0
94	#endif	120	#endif
95		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
96	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
97	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
98	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
99	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
100		137
		138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
101	/* this is a structure representing a c-level coroutine */	141	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	142	typedef struct coro_cctx {
103	struct coro_stack *next;	143	struct coro_cctx *next;
104		144
105	/* the stack */	145	/* the stack */
106	void *sptr;	146	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
108		148
109	/* cpu state */	149	/* cpu state */
110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111	JMPENV *top_env;	152	JMPENV *top_env;
112	coro_context cctx;	153	coro_context cctx;
113	} coro_stack;	154
		155	#if CORO_USE_VALGRIND
		156	int valgrind_id;
		157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
114		167
115	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
116	struct coro {	169	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	171	coro_cctx *cctx;
119		172
120	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
121	AV *args;	174	AV *args;
122	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
123		178
124	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
125	AV *defav;	180	AV *defav; /* @_ */
126	SV *defsv;	181	SV *defsv; /* $_ */
127	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
128		186
129	/* saved global state not related to stacks */	187	#define VAR(name,type) type name;
130	U8 dowarn;	188	# include "state.h"
131	I32 in_eval;	189	#undef VAR
132
133	/* the stacks and related info (callchain etc..) */
134	PERL_SI *curstackinfo;
135	AV *curstack;
136	AV *mainstack;
137	SV **stack_sp;
138	OP *op;
139	SV **curpad;
140	AV *comppad;
141	CV *compcv;
142	SV **stack_base;
143	SV **stack_max;
144	SV **tmps_stack;
145	I32 tmps_floor;
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		190
163	/* coro process data */	191	/* coro process data */
164	int prio;	192	int prio;
165	};	193	};
166		194
167	typedef struct coro *Coro__State;	195	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	196	typedef struct coro *Coro__State_or_hashref;
169		197
		198	/** Coro ********************************************************************/
		199
		200	#define PRIO_MAX 3
		201	#define PRIO_HIGH 1
		202	#define PRIO_NORMAL 0
		203	#define PRIO_LOW -1
		204	#define PRIO_IDLE -3
		205	#define PRIO_MIN -4
		206
		207	/* for Coro.pm */
		208	static SV *coro_current;
		209	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		210	static int coro_nready;
		211
		212	/** lowlevel stuff **********************************************************/
		213
170	static AV *	214	static AV *
171	coro_clone_padlist (CV *cv)	215	coro_clone_padlist (pTHX_ CV *cv)
172	{	216	{
173	AV *padlist = CvPADLIST (cv);	217	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	218	AV *newpadlist, *newpad;
175		219
176	newpadlist = newAV ();	220	newpadlist = newAV ();
…		…
188		232
189	return newpadlist;	233	return newpadlist;
190	}	234	}
191		235
192	static void	236	static void
193	free_padlist (AV *padlist)	237	free_padlist (pTHX_ AV *padlist)
194	{	238	{
195	/* may be during global destruction */	239	/* may be during global destruction */
196	if (SvREFCNT (padlist))	240	if (SvREFCNT (padlist))
197	{	241	{
198	I32 i = AvFILLp (padlist);	242	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	263	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	264	AV *av = (AV *)mg->mg_obj;
221		265
222	/* casting is fun. */	266	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	268	free_padlist (aTHX_ padlist);
225		269
226	SvREFCNT_dec (av);	270	SvREFCNT_dec (av);
227		271
228	return 0;	272	return 0;
229	}	273	}
230		274
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	275	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		276
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	277	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		278
		279	#define CORO_MAGIC(cv) \
		280	SvMAGIC (cv) \
		281	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		282	? SvMAGIC (cv) \
		283	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		284	: 0
		285
235	/* the next two functions merely cache the padlists */	286	/* the next two functions merely cache the padlists */
236	static void	287	static void
237	get_padlist (CV *cv)	288	get_padlist (pTHX_ CV *cv)
238	{	289	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	MAGIC *mg = CORO_MAGIC (cv);
		291	AV *av;
240		292
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	293	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	294	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	295	else
244	{	296	{
245	#if 0	297	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	298	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	299	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	300	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	301	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	302	SvREFCNT_dec (cp);
251	#else	303	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	304	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	305	#endif
254	}	306	}
255	}	307	}
256		308
257	static void	309	static void
258	put_padlist (CV *cv)	310	put_padlist (pTHX_ CV *cv)
259	{	311	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	312	MAGIC *mg = CORO_MAGIC (cv);
		313	AV *av;
261		314
262	if (!mg)	315	if (!mg)
263	{	316	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	317	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	318	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	319	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	320	mg->mg_obj = (SV *)newAV ();
268	}	321	}
269		322
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	323	av = (AV *)mg->mg_obj;
		324
		325	if (AvFILLp (av) >= AvMAX (av))
		326	av_extend (av, AvMAX (av) + 1);
		327
		328	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
271	}	329	}
		330
		331	/** load & save, init *******************************************************/
272		332
273	#define SB do {	333	#define SB do {
274	#define SE } while (0)	334	#define SE } while (0)
275		335
276	#define LOAD(state) load_state((state));
277	#define SAVE(state,flags) save_state((state),(flags));
278
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	336	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
280		337
281	static void	338	static void
282	load_state(Coro__State c)	339	load_perl (pTHX_ Coro__State c)
283	{	340	{
284	PL_dowarn = c->dowarn;	341	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	342	# include "state.h"
286		343	#undef VAR
287	PL_curstackinfo = c->curstackinfo;
288	PL_curstack = c->curstack;
289	PL_mainstack = c->mainstack;
290	PL_stack_sp = c->stack_sp;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317		344
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	345	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	346	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	347	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		348	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		349
		350	if (c->irssv)
		351	{
		352	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		353	{
		354	SvREFCNT_dec (c->irssv);
		355	c->irssv = 0;
		356	}
		357	else
		358	{
		359	REPLACE_SV (PL_rs, c->irssv);
		360	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		361	sv_setsv (c->irssv_sv, PL_rs);
		362	}
		363	}
321		364
322	{	365	{
323	dSP;	366	dSP;
324	CV *cv;	367	CV *cv;
325		368
326	/* now do the ugly restore mess */	369	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	370	while ((cv = (CV *)POPs))
328	{	371	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	372	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	373	CvDEPTH (cv) = PTR2IV (POPs);
335	}	374	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	375	}
339		376
340	PUTBACK;	377	PUTBACK;
341	}	378	}
		379	assert (!PL_comppad || AvARRAY (PL_comppad));//D
342	}	380	}
343		381
344	static void	382	static void
345	save_state(Coro__State c, int flags)	383	save_perl (pTHX_ Coro__State c)
346	{	384	{
		385	assert (!PL_comppad || AvARRAY (PL_comppad));//D
347	{	386	{
348	dSP;	387	dSP;
349	I32 cxix = cxstack_ix;	388	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	389	PERL_CONTEXT *ccstk = cxstack;
351	PERL_SI *top_si = PL_curstackinfo;	390	PERL_SI *top_si = PL_curstackinfo;
…		…
353	/*	392	/*
354	* the worst thing you can imagine happens first - we have to save	393	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	394	* (and reinitialize) all cv's in the whole callchain :(
356	*/	395	*/
357		396
		397	EXTEND (SP, 3 + 1);
358	PUSHs (Nullsv);	398	PUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	399	/* this loop was inspired by pp_caller */
360	for (;;)	400	for (;;)
361	{	401	{
362	while (cxix >= 0)	402	while (cxix >= 0)
363	{	403	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	404	PERL_CONTEXT *cx = &ccstk[cxix--];
365		405
366	if (CxTYPE(cx) == CXt_SUB)	406	if (CxTYPE (cx) == CXt_SUB)
367	{	407	{
368	CV *cv = cx->blk_sub.cv;	408	CV *cv = cx->blk_sub.cv;
		409
369	if (CvDEPTH(cv))	410	if (CvDEPTH (cv))
370	{	411	{
371	EXTEND (SP, CvDEPTH(cv)*2);	412	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	413	PUSHs ((SV *)CvPADLIST (cv));
		414	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
382		416
		417	CvDEPTH (cv) = 0;
383	get_padlist (cv);	418	get_padlist (aTHX_ cv);
384	}	419	}
385	}	420	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	421	}
395		422
396	if (top_si->si_type == PERLSI_MAIN)	423	if (top_si->si_type == PERLSI_MAIN)
397	break;	424	break;
398		425
…		…
402	}	429	}
403		430
404	PUTBACK;	431	PUTBACK;
405	}	432	}
406		433
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	434	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	435	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	436	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		437	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		438	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
410		439
411	c->dowarn = PL_dowarn;	440	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	441	# include "state.h"
413		442	#undef VAR
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;
418	c->op = PL_op;
419	c->curpad = PL_curpad;
420	c->comppad = PL_comppad;
421	c->compcv = PL_compcv;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	443	}
445		444
446	/*	445	/*
447	* allocate various perl stacks. This is an exact copy	446	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	447	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	448	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	449	* not usually need a lot of stackspace.
451	*/	450	*/
		451	#if CORO_PREFER_PERL_FUNCTIONS
		452	# define coro_init_stacks init_stacks
		453	#else
452	static void	454	static void
453	coro_init_stacks ()	455	coro_init_stacks (pTHX)
454	{	456	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	457	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
456	PL_curstackinfo->si_type = PERLSI_MAIN;	458	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	459	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	460	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		461
460	PL_stack_base = AvARRAY(PL_curstack);	462	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	463	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	464	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		465
464	New(50,PL_tmps_stack,96,SV*);	466	New(50,PL_tmps_stack,128,SV*);
465	PL_tmps_floor = -1;	467	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	468	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	469	PL_tmps_max = 128;
468		470
469	New(54,PL_markstack,16,I32);	471	New(54,PL_markstack,32,I32);
470	PL_markstack_ptr = PL_markstack;	472	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	473	PL_markstack_max = PL_markstack + 32;
472		474
473	#ifdef SET_MARK_OFFSET	475	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	476	SET_MARK_OFFSET;
475	#endif	477	#endif
476		478
477	New(54,PL_scopestack,16,I32);	479	New(54,PL_scopestack,32,I32);
478	PL_scopestack_ix = 0;	480	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	481	PL_scopestack_max = 32;
480		482
481	New(54,PL_savestack,96,ANY);	483	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	484	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	485	PL_savestack_max = 64;
484		486
485	#if !PERL_VERSION_ATLEAST (5,9,0)	487	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	488	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	489	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	490	PL_retstack_max = 16;
489	#endif	491	#endif
490	}	492	}
		493	#endif
491		494
492	/*	495	/*
493	* destroy the stacks, the callchain etc...	496	* destroy the stacks, the callchain etc...
494	*/	497	*/
495	static void	498	static void
496	coro_destroy_stacks()	499	coro_destroy_stacks (pTHX)
497	{	500	{
498	if (!IN_DESTRUCT)	501	if (!IN_DESTRUCT)
499	{	502	{
500	/* is this ugly, I ask? */	503	/* restore all saved variables and stuff */
501	LEAVE_SCOPE (0);	504	LEAVE_SCOPE (0);
		505	assert (PL_tmps_floor == -1);
502		506
503	/* sure it is, but more important: is it correct?? :/ */	507	/* free all temporaries */
504	FREETMPS;	508	FREETMPS;
		509	assert (PL_tmps_ix == -1);
505		510
		511	/* unwind all extra stacks */
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	512	POPSTACK_TO (PL_mainstack);
		513
		514	/* unwind main stack */
		515	dounwind (-1);
507	}	516	}
508		517
509	while (PL_curstackinfo->si_next)	518	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	519	PL_curstackinfo = PL_curstackinfo->si_next;
511		520
512	while (PL_curstackinfo)	521	while (PL_curstackinfo)
513	{	522	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	523	PERL_SI *p = PL_curstackinfo->si_prev;
515		524
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	525	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	526	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		527
528	Safefree (PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	529	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	530	PL_curstackinfo = p;
531	}	531	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	537	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	538	Safefree (PL_retstack);
539	#endif	539	#endif
540	}	540	}
541		541
		542	/** coroutine stack handling ************************************************/
		543
542	static void	544	static void
543	setup_coro (struct coro *coro)	545	setup_coro (pTHX_ struct coro *coro)
544	{	546	{
545	/*	547	/*
546	* emulate part of the perl startup here.	548	* emulate part of the perl startup here.
547	*/	549	*/
548
549	coro_init_stacks ();	550	coro_init_stacks (aTHX);
550		551
		552	PL_curcop = &PL_compiling;
		553	PL_in_eval = EVAL_NULL;
551	PL_curcop = 0;	554	PL_comppad = 0;
552	PL_in_eval = 0;
553	PL_curpm = 0;	555	PL_curpm = 0;
		556	PL_localizing = 0;
		557	PL_dirty = 0;
		558	PL_restartop = 0;
554		559
555	{	560	{
556	dSP;	561	dSP;
557	LOGOP myop;	562	LOGOP myop;
558		563
559	/* I have no idea why this is needed, but it is */
560	PUSHMARK (SP);
561
562	SvREFCNT_dec (GvAV (PL_defgv));	564	SvREFCNT_dec (GvAV (PL_defgv));
563	GvAV (PL_defgv) = coro->args; coro->args = 0;	565	GvAV (PL_defgv) = coro->args; coro->args = 0;
564		566
565	Zero (&myop, 1, LOGOP);	567	Zero (&myop, 1, LOGOP);
566	myop.op_next = Nullop;	568	myop.op_next = Nullop;
567	myop.op_flags = OPf_WANT_VOID;	569	myop.op_flags = OPf_WANT_VOID;
568		570
		571	PUSHMARK (SP);
		572	XPUSHs (av_shift (GvAV (PL_defgv)));
		573	PUTBACK;
569	PL_op = (OP *)&myop;	574	PL_op = (OP *)&myop;
570
571	PUSHMARK (SP);
572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573	PUTBACK;
574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	575	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575	SPAGAIN;	576	SPAGAIN;
576
577	ENTER; /* necessary e.g. for dounwind */
578	}	577	}
579	}
580		578
		579	ENTER; /* necessary e.g. for dounwind */
		580	}
		581
581	static void	582	static void
582	free_coro_mortal ()	583	free_coro_mortal (pTHX)
583	{	584	{
584	if (coro_mortal)	585	if (coro_mortal)
585	{	586	{
586	SvREFCNT_dec (coro_mortal);	587	SvREFCNT_dec (coro_mortal);
587	coro_mortal = 0;	588	coro_mortal = 0;
588	}	589	}
589	}	590	}
590		591
		592	/* inject a fake call to Coro::State::_cctx_init into the execution */
		593	/* _cctx_init shoukld be careful, as it could be called at almost any time */
		594	/* during execution of a pelr program */
591	static void NOINLINE	595	static void NOINLINE
592	prepare_cctx (coro_stack *cctx)	596	prepare_cctx (pTHX_ coro_cctx *cctx)
593	{	597	{
594	dSP;	598	dSP;
595	LOGOP myop;	599	LOGOP myop;
596		600
597	Zero (&myop, 1, LOGOP);	601	Zero (&myop, 1, LOGOP);
598	myop.op_next = PL_op;	602	myop.op_next = PL_op;
599	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
600
601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602		604
603	PUSHMARK (SP);	605	PUSHMARK (SP);
		606	EXTEND (SP, 2);
		607	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	608	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
605	PUTBACK;	609	PUTBACK;
		610	PL_op = (OP *)&myop;
606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	611	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607	SPAGAIN;	612	SPAGAIN;
608	}	613	}
609		614
		615	/*
		616	* this is a _very_ stripped down perl interpreter ;)
		617	*/
610	static void	618	static void
611	coro_run (void *arg)	619	coro_run (void *arg)
612	{	620	{
		621	dTHX;
		622
613	/* coro_run is the alternative epilogue of transfer() */	623	/* coro_run is the alternative tail of transfer(), so unlock here. */
614	UNLOCK;	624	UNLOCK;
615		625
		626	PL_top_env = &PL_start_env;
		627
		628	/* inject a fake subroutine call to cctx_init */
		629	prepare_cctx (aTHX_ (coro_cctx *)arg);
		630
		631	/* somebody or something will hit me for both perl_run and PL_restartop */
		632	PL_restartop = PL_op;
		633	perl_run (PL_curinterp);
		634
616	/*	635	/*
617	* this is a _very_ stripped down perl interpreter ;)	636	* If perl-run returns we assume exit() was being called or the coro
		637	* fell off the end, which seems to be the only valid (non-bug)
		638	* reason for perl_run to return. We try to exit by jumping to the
		639	* bootstrap-time "top" top_env, as we cannot restore the "main"
		640	* coroutine as Coro has no such concept
618	*/	641	*/
619	PL_top_env = &PL_start_env;	642	PL_top_env = main_top_env;
620	/* inject call to cctx_init */	643	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
621	prepare_cctx ((coro_stack *)arg);
622
623	/* somebody will hit me for both perl_run and PL_restartop */
624	perl_run (PL_curinterp);
625
626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
627	abort ();
628	}	644	}
629		645
630	static coro_stack *	646	static coro_cctx *
631	stack_new ()	647	cctx_new ()
632	{	648	{
633	coro_stack *stack;	649	coro_cctx *cctx;
		650	void *stack_start;
		651	size_t stack_size;
634		652
		653	++cctx_count;
		654
635	New (0, stack, 1, coro_stack);	655	Newz (0, cctx, 1, coro_cctx);
636		656
637	#if HAVE_MMAP	657	#if HAVE_MMAP
638		658
639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	659	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640	/* mmap suppsedly does allocate-on-write for us */	660	/* mmap supposedly does allocate-on-write for us */
641	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	661	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642		662
643	if (stack->sptr == (void *)-1)	663	if (cctx->sptr != (void *)-1)
644	{
645	perror ("FATAL: unable to mmap stack for coroutine");
646	_exit (EXIT_FAILURE);
647	}	664	{
648
649	# if STACKGUARD	665	# if CORO_STACKGUARD
650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	666	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
651	# endif	667	# endif
652		668	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
653	#else	669	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
654		670	cctx->mapped = 1;
655	stack->ssize = STACKSIZE * (long)sizeof (long);
656	New (0, stack->sptr, STACKSIZE, long);
657
658	if (!stack->sptr)
659	{	671	}
		672	else
		673	#endif
		674	{
		675	cctx->ssize = coro_stacksize * (long)sizeof (long);
		676	New (0, cctx->sptr, coro_stacksize, long);
		677
		678	if (!cctx->sptr)
		679	{
660	perror (stderr, "FATAL: unable to malloc stack for coroutine");	680	perror ("FATAL: unable to allocate stack for coroutine");
661	_exit (EXIT_FAILURE);	681	_exit (EXIT_FAILURE);
662	}	682	}
663		683
664	#endif	684	stack_start = cctx->sptr;
		685	stack_size = cctx->ssize;
		686	}
665		687
		688	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	689	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
667		690
668	return stack;	691	return cctx;
669	}	692	}
670		693
671	static void	694	static void
672	stack_free (coro_stack *stack)	695	cctx_destroy (coro_cctx *cctx)
673	{	696	{
674	if (!stack)	697	if (!cctx)
675	return;	698	return;
676		699
		700	--cctx_count;
		701
		702	#if CORO_USE_VALGRIND
		703	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		704	#endif
		705
677	#if HAVE_MMAP	706	#if HAVE_MMAP
		707	if (cctx->mapped)
678	munmap (stack->sptr, stack->ssize);	708	munmap (cctx->sptr, cctx->ssize);
679	#else	709	else
		710	#endif
680	Safefree (stack->sptr);	711	Safefree (cctx->sptr);
681	#endif
682		712
683	Safefree (stack);	713	Safefree (cctx);
684	}	714	}
685		715
686	static coro_stack *stack_first;
687	static int cctx_count, cctx_idle;
688
689	static coro_stack *	716	static coro_cctx *
690	stack_get ()	717	cctx_get (pTHX)
691	{	718	{
692	coro_stack *stack;	719	while (cctx_first)
693
694	if (stack_first)
695	{	720	{
		721	coro_cctx *cctx = cctx_first;
		722	cctx_first = cctx->next;
696	--cctx_idle;	723	--cctx_idle;
697	stack = stack_first;	724
698	stack_first = stack->next;	725	if (cctx->ssize >= coro_stacksize)
		726	return cctx;
		727
		728	cctx_destroy (cctx);
699	}	729	}
700	else	730
701	{
702	++cctx_count;
703	stack = stack_new ();
704	PL_op = PL_op->op_next;	731	PL_op = PL_op->op_next;
		732	return cctx_new ();
		733	}
		734
		735	static void
		736	cctx_put (coro_cctx *cctx)
		737	{
		738	/* free another cctx if overlimit */
		739	if (cctx_idle >= MAX_IDLE_CCTX)
		740	{
		741	coro_cctx *first = cctx_first;
		742	cctx_first = first->next;
		743	--cctx_idle;
		744
		745	assert (!first->inuse);
		746	cctx_destroy (first);
705	}	747	}
706		748
707	return stack;
708	}
709
710	static void
711	stack_put (coro_stack *stack)
712	{
713	++cctx_idle;	749	++cctx_idle;
714	stack->next = stack_first;	750	cctx->next = cctx_first;
715	stack_first = stack;	751	cctx_first = cctx;
716	}	752	}
		753
		754	/** coroutine switching *****************************************************/
717		755
718	/* never call directly, always through the coro_state_transfer global variable */	756	/* never call directly, always through the coro_state_transfer global variable */
719	static void NOINLINE	757	static void NOINLINE
720	transfer (struct coro *prev, struct coro *next, int flags)	758	transfer (pTHX_ struct coro *prev, struct coro *next)
721	{	759	{
722	dSTACKLEVEL;	760	dSTACKLEVEL;
723		761
724	/* sometimes transfer is only called to set idle_sp */	762	/* sometimes transfer is only called to set idle_sp */
725	if (flags == TRANSFER_SET_STACKLEVEL)	763	if (!next)
		764	{
726	((coro_stack *)prev)->idle_sp = STACKLEVEL;	765	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		766	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		767	}
727	else if (prev != next)	768	else if (prev != next)
728	{	769	{
729	coro_stack *prev__stack;	770	coro_cctx *prev__cctx;
		771
		772	if (prev->flags & CF_NEW)
		773	{
		774	/* create a new empty context */
		775	Newz (0, prev->cctx, 1, coro_cctx);
		776	prev->cctx->inuse = 1;
		777	prev->flags &= ~CF_NEW;
		778	prev->flags |= CF_RUNNING;
		779	}
		780
		781	/*TODO: must not croak here */
		782	if (!prev->flags & CF_RUNNING)
		783	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		784
		785	if (next->flags & CF_RUNNING)
		786	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		787
		788	if (next->flags & CF_DESTROYED)
		789	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		790
		791	prev->flags &= ~CF_RUNNING;
		792	next->flags |= CF_RUNNING;
730		793
731	LOCK;	794	LOCK;
732		795
733	if (next->mainstack)	796	if (next->flags & CF_NEW)
734	{	797	{
735	/* coroutine already started */	798	/* need to start coroutine */
736	SAVE (prev, flags);	799	next->flags &= ~CF_NEW;
737	LOAD (next);	800	/* first get rid of the old state */
		801	save_perl (aTHX_ prev);
		802	/* setup coroutine call */
		803	setup_coro (aTHX_ next);
		804	/* need a new stack */
		805	assert (!next->cctx);
738	}	806	}
739	else	807	else
740	{	808	{
741	/* need to start coroutine */	809	/* coroutine already started */
742	/* first get rid of the old state */	810	save_perl (aTHX_ prev);
743	SAVE (prev, -1);	811	load_perl (aTHX_ next);
744	/* setup coroutine call */
745	setup_coro (next);
746	/* need a stack */
747	next->stack = 0;
748	}	812	}
749		813
750	if (!prev->stack)
751	/* create a new empty context */
752	Newz (0, prev->stack, 1, coro_stack);
753
754	prev__stack = prev->stack;	814	prev__cctx = prev->cctx;
755		815
756	/* possibly "free" the stack */	816	/* possibly "free" the cctx */
757	if (prev__stack->idle_sp == STACKLEVEL)	817	if (prev__cctx->idle_sp == STACKLEVEL)
758	{	818	{
759	stack_put (prev__stack);	819	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		820	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		821
760	prev->stack = 0;	822	prev->cctx = 0;
		823
		824	cctx_put (prev__cctx);
		825	prev__cctx->inuse = 0;
761	}	826	}
762		827
763	if (!next->stack)	828	if (!next->cctx)
764	next->stack = stack_get ();
765
766	if (prev__stack != next->stack)
767	{	829	{
768	prev__stack->top_env = PL_top_env;	830	next->cctx = cctx_get (aTHX);
769	PL_top_env = next->stack->top_env;	831	assert (!next->cctx->inuse);
770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	832	next->cctx->inuse = 1;
771	}	833	}
772		834
		835	if (prev__cctx != next->cctx)
		836	{
		837	prev__cctx->top_env = PL_top_env;
		838	PL_top_env = next->cctx->top_env;
		839	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		840	}
		841
773	free_coro_mortal ();	842	free_coro_mortal (aTHX);
774
775	UNLOCK;	843	UNLOCK;
776	}	844	}
777	}	845	}
778		846
779	struct transfer_args	847	struct transfer_args
780	{	848	{
781	struct coro *prev, *next;	849	struct coro *prev, *next;
782	int flags;
783	};	850	};
784		851
785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	852	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
786		853
		854	/** high level stuff ********************************************************/
		855
787	static void	856	static int
788	coro_state_destroy (struct coro *coro)	857	coro_state_destroy (pTHX_ struct coro *coro)
789	{	858	{
790	if (coro->refcnt--)	859	if (coro->flags & CF_DESTROYED)
791	return;	860	return 0;
		861
		862	coro->flags |= CF_DESTROYED;
		863
		864	if (coro->flags & CF_READY)
		865	{
		866	/* reduce nready, as destroying a ready coro effectively unreadies it */
		867	/* alternative: look through all ready queues and remove the coro */
		868	LOCK;
		869	--coro_nready;
		870	UNLOCK;
		871	}
		872	else
		873	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
792		874
793	if (coro->mainstack && coro->mainstack != main_mainstack)	875	if (coro->mainstack && coro->mainstack != main_mainstack)
794	{	876	{
795	struct coro temp;	877	struct coro temp;
796		878
797	SAVE ((&temp), TRANSFER_SAVE_ALL);	879	assert (!(coro->flags & CF_RUNNING));
798	LOAD (coro);
799		880
		881	Zero (&temp, 1, struct coro);
		882	temp.save = CORO_SAVE_DEF;
		883
		884	if (coro->flags & CF_RUNNING)
		885	croak ("FATAL: tried to destroy currently running coroutine");
		886
		887	save_perl (aTHX_ &temp);
		888	load_perl (aTHX_ coro);
		889
800	coro_destroy_stacks ();	890	coro_destroy_stacks (aTHX);
801		891
802	LOAD ((&temp)); /* this will get rid of defsv etc.. */	892	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
803		893
804	coro->mainstack = 0;	894	coro->mainstack = 0;
805	}	895	}
806		896
807	stack_free (coro->stack);	897	cctx_destroy (coro->cctx);
808	SvREFCNT_dec (coro->args);	898	SvREFCNT_dec (coro->args);
809	Safefree (coro);	899
		900	return 1;
810	}	901	}
811		902
812	static int	903	static int
813	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	904	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814	{	905	{
815	struct coro *coro = (struct coro *)mg->mg_ptr;	906	struct coro *coro = (struct coro *)mg->mg_ptr;
816	mg->mg_ptr = 0;	907	mg->mg_ptr = 0;
817		908
		909	if (--coro->refcnt < 0)
		910	{
818	coro_state_destroy (coro);	911	coro_state_destroy (aTHX_ coro);
		912	Safefree (coro);
		913	}
819		914
820	return 0;	915	return 0;
821	}	916	}
822		917
823	static int	918	static int
…		…
830	return 0;	925	return 0;
831	}	926	}
832		927
833	static MGVTBL coro_state_vtbl = {	928	static MGVTBL coro_state_vtbl = {
834	0, 0, 0, 0,	929	0, 0, 0, 0,
835	coro_state_clear,	930	coro_state_free,
836	0,	931	0,
837	#ifdef MGf_DUP	932	#ifdef MGf_DUP
838	coro_state_dup,	933	coro_state_dup,
839	#else	934	#else
840	# define MGf_DUP 0	935	# define MGf_DUP 0
841	#endif	936	#endif
842	};	937	};
843		938
844	static struct coro *	939	static struct coro *
845	SvSTATE (SV *coro)	940	SvSTATE_ (pTHX_ SV *coro)
846	{	941	{
847	HV *stash;	942	HV *stash;
848	MAGIC *mg;	943	MAGIC *mg;
849		944
850	if (SvROK (coro))	945	if (SvROK (coro))
…		…
856	/* very slow, but rare, check */	951	/* very slow, but rare, check */
857	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	952	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
858	croak ("Coro::State object required");	953	croak ("Coro::State object required");
859	}	954	}
860		955
861	mg = SvMAGIC (coro);	956	mg = CORO_MAGIC (coro);
862	assert (mg->mg_type == PERL_MAGIC_ext);
863	return (struct coro *)mg->mg_ptr;	957	return (struct coro *)mg->mg_ptr;
864	}	958	}
865		959
		960	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		961
866	static void	962	static void
867	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	963	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
868	{	964	{
869	ta->prev = SvSTATE (prev);	965	ta->prev = SvSTATE (prev_sv);
870	ta->next = SvSTATE (next);	966	ta->next = SvSTATE (next_sv);
871	ta->flags = flags;
872	}	967	}
873		968
874	static void	969	static void
875	api_transfer (SV *prev, SV *next, int flags)	970	api_transfer (SV *prev_sv, SV *next_sv)
876	{	971	{
877	dTHX;	972	dTHX;
878	struct transfer_args ta;	973	struct transfer_args ta;
879		974
880	prepare_transfer (&ta, prev, next, flags);	975	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	976	TRANSFER (ta);
882	}	977	}
883		978
		979	static int
		980	api_save (SV *coro_sv, int new_save)
		981	{
		982	dTHX;
		983	struct coro *coro = SvSTATE (coro_sv);
		984	int old_save = coro->save;
		985
		986	if (new_save >= 0)
		987	coro->save = new_save;
		988
		989	return old_save;
		990	}
		991
884	/** Coro ********************************************************************/	992	/** Coro ********************************************************************/
885		993
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static GV *coro_current, *coro_idle;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	994	static void
899	coro_enq (SV *sv)	995	coro_enq (pTHX_ SV *coro_sv)
900	{	996	{
901	int prio;
902
903	if (SvTYPE (sv) != SVt_PVHV)
904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
905
906	prio = SvSTATE (sv)->prio;
907
908	av_push (coro_ready [prio - PRIO_MIN], sv);	997	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
909	coro_nready++;
910	}	998	}
911		999
912	static SV *	1000	static SV *
913	coro_deq (int min_prio)	1001	coro_deq (pTHX_ int min_prio)
914	{	1002	{
915	int prio = PRIO_MAX - PRIO_MIN;	1003	int prio = PRIO_MAX - PRIO_MIN;
916		1004
917	min_prio -= PRIO_MIN;	1005	min_prio -= PRIO_MIN;
918	if (min_prio < 0)	1006	if (min_prio < 0)
919	min_prio = 0;	1007	min_prio = 0;
920		1008
921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1009	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
922	if (AvFILLp (coro_ready [prio]) >= 0)	1010	if (AvFILLp (coro_ready [prio]) >= 0)
923	{
924	coro_nready--;
925	return av_shift (coro_ready [prio]);	1011	return av_shift (coro_ready [prio]);
926	}
927		1012
928	return 0;	1013	return 0;
929	}	1014	}
930		1015
931	static void	1016	static int
932	api_ready (SV *coro)	1017	api_ready (SV *coro_sv)
933	{	1018	{
934	dTHX;	1019	dTHX;
		1020	struct coro *coro;
935		1021
936	if (SvROK (coro))	1022	if (SvROK (coro_sv))
937	coro = SvRV (coro);	1023	coro_sv = SvRV (coro_sv);
		1024
		1025	coro = SvSTATE (coro_sv);
		1026
		1027	if (coro->flags & CF_READY)
		1028	return 0;
		1029
		1030	coro->flags |= CF_READY;
938		1031
939	LOCK;	1032	LOCK;
940	coro_enq (SvREFCNT_inc (coro));	1033	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1034	++coro_nready;
941	UNLOCK;	1035	UNLOCK;
942	}
943		1036
		1037	return 1;
		1038	}
		1039
944	static void	1040	static int
		1041	api_is_ready (SV *coro_sv)
		1042	{
		1043	dTHX;
		1044	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1045	}
		1046
		1047	static void
945	prepare_schedule (struct transfer_args *ta)	1048	prepare_schedule (pTHX_ struct transfer_args *ta)
946	{	1049	{
947	SV *current, *prev, *next;	1050	SV *prev_sv, *next_sv;
948
949	current = GvSV (coro_current);
950		1051
951	for (;;)	1052	for (;;)
952	{	1053	{
953	LOCK;	1054	LOCK;
954	next = coro_deq (PRIO_MIN);	1055	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1056
		1057	/* nothing to schedule: call the idle handler */
		1058	if (!next_sv)
		1059	{
		1060	dSP;
		1061	UNLOCK;
		1062
		1063	ENTER;
		1064	SAVETMPS;
		1065
		1066	PUSHMARK (SP);
		1067	PUTBACK;
		1068	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1069
		1070	FREETMPS;
		1071	LEAVE;
		1072	continue;
		1073	}
		1074
		1075	ta->next = SvSTATE (next_sv);
		1076
		1077	/* cannot transfer to destroyed coros, skip and look for next */
		1078	if (ta->next->flags & CF_DESTROYED)
		1079	{
		1080	UNLOCK;
		1081	SvREFCNT_dec (next_sv);
		1082	/* coro_nready is already taken care of by destroy */
		1083	continue;
		1084	}
		1085
		1086	--coro_nready;
955	UNLOCK;	1087	UNLOCK;
956
957	if (next)
958	break;	1088	break;
959
960	{
961	dSP;
962
963	ENTER;
964	SAVETMPS;
965
966	PUSHMARK (SP);
967	PUTBACK;
968	call_sv (GvSV (coro_idle), G_DISCARD);
969
970	FREETMPS;
971	LEAVE;
972	}	1089	}
973	}
974
975	prev = SvRV (current);
976	SvRV (current) = next;
977		1090
978	/* free this only after the transfer */	1091	/* free this only after the transfer */
		1092	prev_sv = SvRV (coro_current);
		1093	SvRV_set (coro_current, next_sv);
		1094	ta->prev = SvSTATE (prev_sv);
		1095
		1096	assert (ta->next->flags & CF_READY);
		1097	ta->next->flags &= ~CF_READY;
		1098
979	LOCK;	1099	LOCK;
980	free_coro_mortal ();	1100	free_coro_mortal (aTHX);
		1101	coro_mortal = prev_sv;
981	UNLOCK;	1102	UNLOCK;
982	coro_mortal = prev;
983
984	ta->prev = SvSTATE (prev);
985	ta->next = SvSTATE (next);
986	ta->flags = TRANSFER_SAVE_ALL;
987	}	1103	}
988		1104
989	static void	1105	static void
990	prepare_cede (struct transfer_args *ta)	1106	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1107	{
992	LOCK;	1108	api_ready (coro_current);
993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994	UNLOCK;
995
996	prepare_schedule (ta);	1109	prepare_schedule (aTHX_ ta);
		1110	}
		1111
		1112	static int
		1113	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1114	{
		1115	if (coro_nready)
		1116	{
		1117	SV *prev = SvRV (coro_current);
		1118	prepare_schedule (aTHX_ ta);
		1119	api_ready (prev);
		1120	return 1;
		1121	}
		1122	else
		1123	return 0;
997	}	1124	}
998		1125
999	static void	1126	static void
1000	api_schedule (void)	1127	api_schedule (void)
1001	{	1128	{
1002	dTHX;	1129	dTHX;
1003	struct transfer_args ta;	1130	struct transfer_args ta;
1004		1131
1005	prepare_schedule (&ta);	1132	prepare_schedule (aTHX_ &ta);
1006	TRANSFER (ta);	1133	TRANSFER (ta);
1007	}	1134	}
1008		1135
1009	static void	1136	static int
1010	api_cede (void)	1137	api_cede (void)
1011	{	1138	{
1012	dTHX;	1139	dTHX;
1013	struct transfer_args ta;	1140	struct transfer_args ta;
1014		1141
1015	prepare_cede (&ta);	1142	prepare_cede (aTHX_ &ta);
		1143
		1144	if (ta.prev != ta.next)
		1145	{
1016	TRANSFER (ta);	1146	TRANSFER (ta);
		1147	return 1;
		1148	}
		1149	else
		1150	return 0;
		1151	}
		1152
		1153	static int
		1154	api_cede_notself (void)
		1155	{
		1156	dTHX;
		1157	struct transfer_args ta;
		1158
		1159	if (prepare_cede_notself (aTHX_ &ta))
		1160	{
		1161	TRANSFER (ta);
		1162	return 1;
		1163	}
		1164	else
		1165	return 0;
1017	}	1166	}
1018		1167
1019	MODULE = Coro::State PACKAGE = Coro::State	1168	MODULE = Coro::State PACKAGE = Coro::State
1020		1169
1021	PROTOTYPES: DISABLE	1170	PROTOTYPES: DISABLE
…		…
1027	#endif	1176	#endif
1028	BOOT_PAGESIZE;	1177	BOOT_PAGESIZE;
1029		1178
1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1179	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031		1180
1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1181	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1182	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1183	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1184	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1185	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1186	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1187	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1035		1188
1036	main_mainstack = PL_mainstack;	1189	main_mainstack = PL_mainstack;
		1190	main_top_env = PL_top_env;
		1191
		1192	while (main_top_env->je_prev)
		1193	main_top_env = main_top_env->je_prev;
1037		1194
1038	coroapi.ver = CORO_API_VERSION;	1195	coroapi.ver = CORO_API_VERSION;
1039	coroapi.transfer = api_transfer;	1196	coroapi.transfer = api_transfer;
1040		1197
1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1198	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1049	HV *hv;	1206	HV *hv;
1050	int i;	1207	int i;
1051		1208
1052	Newz (0, coro, 1, struct coro);	1209	Newz (0, coro, 1, struct coro);
1053	coro->args = newAV ();	1210	coro->args = newAV ();
		1211	coro->save = CORO_SAVE_DEF;
		1212	coro->flags = CF_NEW;
1054		1213
1055	hv = newHV ();	1214	hv = newHV ();
1056	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1215	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1216	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058		1217
1059	for (i = 1; i < items; i++)	1218	for (i = 1; i < items; i++)
1060	av_push (coro->args, newSVsv (ST (i)));	1219	av_push (coro->args, newSVsv (ST (i)));
1061
1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1063	/*coro->stack = 0;*/
1064	}	1220	}
1065	OUTPUT:	1221	OUTPUT:
		1222	RETVAL
		1223
		1224	int
		1225	save (SV *coro, int new_save = -1)
		1226	CODE:
		1227	RETVAL = api_save (coro, new_save);
		1228	OUTPUT:
		1229	RETVAL
		1230
		1231	int
		1232	save_also (SV *coro_sv, int save_also)
		1233	CODE:
		1234	{
		1235	struct coro *coro = SvSTATE (coro_sv);
		1236	RETVAL = coro->save;
		1237	coro->save |= save_also;
		1238	}
		1239	OUTPUT:
1066	RETVAL	1240	RETVAL
1067		1241
1068	void	1242	void
1069	_set_stacklevel (...)	1243	_set_stacklevel (...)
1070	ALIAS:	1244	ALIAS:
1071	Coro::State::transfer = 1	1245	Coro::State::transfer = 1
1072	Coro::schedule = 2	1246	Coro::schedule = 2
1073	Coro::cede = 3	1247	Coro::cede = 3
1074	Coro::Cont::yield = 4	1248	Coro::cede_notself = 4
1075	CODE:	1249	CODE:
1076	{	1250	{
1077	struct transfer_args ta;	1251	struct transfer_args ta;
1078		1252
1079	switch (ix)	1253	switch (ix)
1080	{	1254	{
1081	case 0:	1255	case 0:
1082	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1256	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1083	ta.next = 0;	1257	ta.next = 0;
1084	ta.flags = TRANSFER_SET_STACKLEVEL;
1085	break;	1258	break;
1086		1259
1087	case 1:	1260	case 1:
1088	if (items != 3)	1261	if (items != 2)
1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1262	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1090		1263
1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1264	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1092	break;	1265	break;
1093		1266
1094	case 2:	1267	case 2:
1095	prepare_schedule (&ta);	1268	prepare_schedule (aTHX_ &ta);
1096	break;	1269	break;
1097		1270
1098	case 3:	1271	case 3:
1099	prepare_cede (&ta);	1272	prepare_cede (aTHX_ &ta);
1100	break;	1273	break;
1101		1274
1102	case 4:	1275	case 4:
1103	{	1276	if (!prepare_cede_notself (aTHX_ &ta))
1104	SV *yieldstack;	1277	XSRETURN_EMPTY;
1105	SV *sv;
1106	AV *defav = GvAV (PL_defgv);
1107		1278
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123	ta.flags = 0;
1124	SvREFCNT_dec (sv);
1125	}
1126	break;	1279	break;
1127
1128	}	1280	}
1129		1281
		1282	BARRIER;
1130	TRANSFER (ta);	1283	TRANSFER (ta);
1131	}
1132		1284
1133	void	1285	if (GIMME_V != G_VOID && ta.next != ta.prev)
1134	_clone_state_from (SV *dst, SV *src)	1286	XSRETURN_YES;
		1287	}
		1288
		1289	bool
		1290	_destroy (SV *coro_sv)
1135	CODE:	1291	CODE:
1136	{	1292	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1137	struct coro *coro_src = SvSTATE (src);	1293	OUTPUT:
1138		1294	RETVAL
1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1140
1141	++coro_src->refcnt;
1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1143	}
1144		1295
1145	void	1296	void
1146	_exit (code)	1297	_exit (code)
1147	int code	1298	int code
1148	PROTOTYPE: $	1299	PROTOTYPE: $
1149	CODE:	1300	CODE:
1150	_exit (code);	1301	_exit (code);
1151		1302
		1303	int
		1304	cctx_stacksize (int new_stacksize = 0)
		1305	CODE:
		1306	RETVAL = coro_stacksize;
		1307	if (new_stacksize)
		1308	coro_stacksize = new_stacksize;
		1309	OUTPUT:
		1310	RETVAL
		1311
		1312	int
		1313	cctx_count ()
		1314	CODE:
		1315	RETVAL = cctx_count;
		1316	OUTPUT:
		1317	RETVAL
		1318
		1319	int
		1320	cctx_idle ()
		1321	CODE:
		1322	RETVAL = cctx_idle;
		1323	OUTPUT:
		1324	RETVAL
		1325
1152	MODULE = Coro::State PACKAGE = Coro	1326	MODULE = Coro::State PACKAGE = Coro
1153		1327
1154	BOOT:	1328	BOOT:
1155	{	1329	{
1156	int i;	1330	int i;
…		…
1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1336	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1337	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1338	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1339	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1166		1340
1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1341	coro_current = get_sv ("Coro::current", FALSE);
1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1342	SvREADONLY_on (coro_current);
1169		1343
1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1344	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171	coro_ready[i] = newAV ();	1345	coro_ready[i] = newAV ();
1172		1346
1173	{	1347	{
1174	SV *sv = perl_get_sv("Coro::API", 1);	1348	SV *sv = perl_get_sv("Coro::API", 1);
1175		1349
1176	coroapi.schedule = api_schedule;	1350	coroapi.schedule = api_schedule;
		1351	coroapi.save = api_save;
1177	coroapi.cede = api_cede;	1352	coroapi.cede = api_cede;
		1353	coroapi.cede_notself = api_cede_notself;
1178	coroapi.ready = api_ready;	1354	coroapi.ready = api_ready;
		1355	coroapi.is_ready = api_is_ready;
1179	coroapi.nready = &coro_nready;	1356	coroapi.nready = &coro_nready;
1180	coroapi.current = coro_current;	1357	coroapi.current = coro_current;
1181		1358
1182	GCoroAPI = &coroapi;	1359	GCoroAPI = &coroapi;
1183	sv_setiv (sv, (IV)&coroapi);	1360	sv_setiv (sv, (IV)&coroapi);
1184	SvREADONLY_on (sv);	1361	SvREADONLY_on (sv);
1185	}	1362	}
1186	}	1363	}
		1364
		1365	void
		1366	_set_current (SV *current)
		1367	PROTOTYPE: $
		1368	CODE:
		1369	SvREFCNT_dec (SvRV (coro_current));
		1370	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1187		1371
1188	int	1372	int
1189	prio (Coro::State coro, int newprio = 0)	1373	prio (Coro::State coro, int newprio = 0)
1190	ALIAS:	1374	ALIAS:
1191	nice = 1	1375	nice = 1
…		…
1194	RETVAL = coro->prio;	1378	RETVAL = coro->prio;
1195		1379
1196	if (items > 1)	1380	if (items > 1)
1197	{	1381	{
1198	if (ix)	1382	if (ix)
1199	newprio += coro->prio;	1383	newprio = coro->prio - newprio;
1200		1384
1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1385	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1386	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1203		1387
1204	coro->prio = newprio;	1388	coro->prio = newprio;
1205	}	1389	}
1206	}	1390	}
		1391	OUTPUT:
		1392	RETVAL
1207		1393
1208	void	1394	SV *
1209	ready (SV *self)	1395	ready (SV *self)
1210	PROTOTYPE: $	1396	PROTOTYPE: $
1211	CODE:	1397	CODE:
1212	api_ready (self);	1398	RETVAL = boolSV (api_ready (self));
		1399	OUTPUT:
		1400	RETVAL
		1401
		1402	SV *
		1403	is_ready (SV *self)
		1404	PROTOTYPE: $
		1405	CODE:
		1406	RETVAL = boolSV (api_is_ready (self));
		1407	OUTPUT:
		1408	RETVAL
1213		1409
1214	int	1410	int
1215	nready (...)	1411	nready (...)
1216	PROTOTYPE:	1412	PROTOTYPE:
1217	CODE:	1413	CODE:
…		…
1223		1419
1224	SV *	1420	SV *
1225	_get_state ()	1421	_get_state ()
1226	CODE:	1422	CODE:
1227	{	1423	{
1228	struct {	1424	struct io_state *data;
1229	int errorno;
1230	int laststype;
1231	int laststatval;
1232	Stat_t statcache;
1233	} data;
1234		1425
		1426	RETVAL = newSV (sizeof (struct io_state));
		1427	data = (struct io_state *)SvPVX (RETVAL);
		1428	SvCUR_set (RETVAL, sizeof (struct io_state));
		1429	SvPOK_only (RETVAL);
		1430
1235	data.errorno = errno;	1431	data->errorno = errno;
1236	data.laststype = PL_laststype;	1432	data->laststype = PL_laststype;
1237	data.laststatval = PL_laststatval;	1433	data->laststatval = PL_laststatval;
1238	data.statcache = PL_statcache;	1434	data->statcache = PL_statcache;
1239
1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
1241	}	1435	}
1242	OUTPUT:	1436	OUTPUT:
1243	RETVAL	1437	RETVAL
1244		1438
1245	void	1439	void
1246	_set_state (char *data_)	1440	_set_state (char *data_)
1247	PROTOTYPE: $	1441	PROTOTYPE: $
1248	CODE:	1442	CODE:
1249	{	1443	{
1250	struct {	1444	struct io_state *data = (void *)data_;
1251	int errorno;
1252	int laststype;
1253	int laststatval;
1254	Stat_t statcache;
1255	} *data = (void *)data_;
1256		1445
1257	errno = data->errorno;	1446	errno = data->errorno;
1258	PL_laststype = data->laststype;	1447	PL_laststype = data->laststype;
1259	PL_laststatval = data->laststatval;	1448	PL_laststatval = data->laststatval;
1260	PL_statcache = data->statcache;	1449	PL_statcache = data->statcache;
1261	}	1450	}
		1451

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