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Comparing Coro/Coro/State.xs (file contents):
Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs.
Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "libcoro/coro.c"	9	#include "patchlevel.h"
6		10
7	#include <signal.h>	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
8		14
9	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
10	# include <unistd.h>	16	# include <unistd.h>
11	# include <sys/mman.h>	17	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
15	# else	21	# else
16	# undef HAVE_MMAP	22	# undef HAVE_MMAP
17	# endif	23	# endif
18	# 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
19	#endif	32	# endif
20
21	#define MAY_FLUSH /* increases codesize */
22
23	/* perl-related */
24	#define TRANSFER_SAVE_DEFAV 0x00000001
25	#define TRANSFER_SAVE_DEFSV 0x00000002
26	#define TRANSFER_SAVE_ERRSV 0x00000004
27	/* c-related */
28	#define TRANSFER_SAVE_CCTXT 0x00000008
29	#ifdef CORO_LAZY_STACK
30	# define TRANSFER_LAZY_STACK 0x00000010
31	#else	33	#else
32	# define TRANSFER_LAZY_STACK 0x00000000	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
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
33	#endif	57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
34		74
35	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \	75	/* 5.8.7 */
36	|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
37		79
38	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
39	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
40		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
41	/* The next macro should delcare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
42	* to the current C stack pointer. It's property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
43	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
44	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
45		98
46	#define labs(l) ((l) >= 0 ? (l) : -(l))	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
47		100
48	/* this is actually not only the c stack but also c registers etc... */	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
		110
		111	#include "CoroAPI.h"
		112
		113	#ifdef USE_ITHREADS
		114	static perl_mutex coro_mutex;
		115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		117	#else
		118	# define LOCK (void)0
		119	# define UNLOCK (void)0
		120	#endif
		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;
		132	static struct CoroAPI coroapi;
		133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static HV *coro_state_stash, *coro_stash;
		135	static SV *coro_mortal; /* will be freed after next transfer */
		136
		137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
		140	/* this is a structure representing a c-level coroutine */
49	typedef struct {	141	typedef struct coro_cctx {
50	int refcnt; /* pointer reference counter */	142	struct coro_cctx *next;
51	int usecnt; /* shared by how many coroutines */
52	int gencnt; /* generation counter */
53		143
		144	/* the stack */
		145	void *sptr;
		146	size_t ssize;
		147
		148	/* cpu state */
		149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		151	JMPENV *top_env;
54	coro_context cctx;	152	coro_context cctx;
55		153
56	void *sptr;	154	#if CORO_USE_VALGRIND
57	long ssize; /* positive == mmap, otherwise malloc */	155	int valgrind_id;
58	} coro_stack;	156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
59		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
		166
		167	/* this is a structure representing a perl-level coroutine */
60	struct coro {	168	struct coro {
61	/* the optional C context */	169	/* the c coroutine allocated to this perl coroutine, if any */
62	coro_stack *stack;	170	coro_cctx *cctx;
63	void *cursp;
64	int gencnt;
65
66	/* optionally saved, might be zero */
67	AV *defav;
68	SV *defsv;
69	SV *errsv;
70
71	/* saved global state not related to stacks */
72	U8 dowarn;
73	I32 in_eval;
74
75	/* the stacks and related info (callchain etc..) */
76	PERL_SI *curstackinfo;
77	AV *curstack;
78	AV *mainstack;
79	SV **stack_sp;
80	OP *op;
81	SV **curpad;
82	SV **stack_base;
83	SV **stack_max;
84	SV **tmps_stack;
85	I32 tmps_floor;
86	I32 tmps_ix;
87	I32 tmps_max;
88	I32 *markstack;
89	I32 *markstack_ptr;
90	I32 *markstack_max;
91	I32 *scopestack;
92	I32 scopestack_ix;
93	I32 scopestack_max;
94	ANY *savestack;
95	I32 savestack_ix;
96	I32 savestack_max;
97	OP **retstack;
98	I32 retstack_ix;
99	I32 retstack_max;
100	COP *curcop;
101	JMPENV *top_env;
102		171
103	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
104	AV *args;	173	AV *args;
		174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
		177
		178	/* optionally saved, might be zero */
		179	AV *defav; /* @_ */
		180	SV *defsv; /* $_ */
		181	SV *errsv; /* $@ */
		182	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
		185
		186	#define VAR(name,type) type name;
		187	# include "state.h"
		188	#undef VAR
		189
		190	/* coro process data */
		191	int prio;
105	};	192	};
106		193
107	typedef struct coro *Coro__State;	194	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	195	typedef struct coro *Coro__State_or_hashref;
109		196
110	static AV *main_mainstack; /* used to differentiate between $main and others */	197	/** Coro ********************************************************************/
111	static HV *coro_state_stash;	198
112	static SV *ucoro_state_sv;	199	#define PRIO_MAX 3
113	static U32 ucoro_state_hash;	200	#define PRIO_HIGH 1
114	static HV *padlist_cache;	201	#define PRIO_NORMAL 0
		202	#define PRIO_LOW -1
		203	#define PRIO_IDLE -3
		204	#define PRIO_MIN -4
115		205
116	/* for Coro.pm */	206	/* for Coro.pm */
117	static GV *coro_current, *coro_idle;	207	static SV *coro_current;
		208	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
118	static AV *coro_ready;	209	static int coro_nready;
119		210
120	/* mostly copied from op.c:cv_clone2 */	211	/** lowlevel stuff **********************************************************/
121	STATIC AV *	212
122	clone_padlist (AV *protopadlist)	213	static AV *
		214	coro_clone_padlist (pTHX_ CV *cv)
123	{	215	{
124	AV *av;	216	AV *padlist = CvPADLIST (cv);
125	I32 ix;
126	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
127	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
128	SV **pname = AvARRAY (protopad_name);
129	SV **ppad = AvARRAY (protopad);
130	I32 fname = AvFILLp (protopad_name);
131	I32 fpad = AvFILLp (protopad);
132	AV *newpadlist, *newpad_name, *newpad;	217	AV *newpadlist, *newpad;
133	SV **npad;
134
135	newpad_name = newAV ();
136	for (ix = fname; ix >= 0; ix--)
137	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
138
139	newpad = newAV ();
140	av_fill (newpad, AvFILLp (protopad));
141	npad = AvARRAY (newpad);
142		218
143	newpadlist = newAV ();	219	newpadlist = newAV ();
144	AvREAL_off (newpadlist);	220	AvREAL_off (newpadlist);
145	av_store (newpadlist, 0, (SV *) newpad_name);	221	#if PERL_VERSION_ATLEAST (5,9,0)
		222	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		223	#else
		224	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		225	#endif
		226	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		227	--AvFILLp (padlist);
		228
		229	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
146	av_store (newpadlist, 1, (SV *) newpad);	230	av_store (newpadlist, 1, (SV *)newpad);
147		231
148	av = newAV (); /* will be @_ */	232	return newpadlist;
149	av_extend (av, 0);	233	}
150	av_store (newpad, 0, (SV *) av);
151	AvFLAGS (av) = AVf_REIFY;
152		234
153	for (ix = fpad; ix > 0; ix--)	235	static void
		236	free_padlist (pTHX_ AV *padlist)
		237	{
		238	/* may be during global destruction */
		239	if (SvREFCNT (padlist))
154	{	240	{
155	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	241	I32 i = AvFILLp (padlist);
156	if (namesv && namesv != &PL_sv_undef)	242	while (i >= 0)
157	{	243	{
158	char *name = SvPVX (namesv); /* XXX */	244	SV **svp = av_fetch (padlist, i--, FALSE);
159	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	245	if (svp)
160	{ /* lexical from outside? */
161	npad[ix] = SvREFCNT_inc (ppad[ix]);
162	}	246	{
163	else
164	{ /* our own lexical */
165	SV *sv;	247	SV *sv;
166	if (*name == '&')	248	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
167	sv = SvREFCNT_inc (ppad[ix]);	249	SvREFCNT_dec (sv);
168	else if (*name == '@')	250
169	sv = (SV *) newAV ();	251	SvREFCNT_dec (*svp);
170	else if (*name == '%')
171	sv = (SV *) newHV ();
172	else
173	sv = NEWSV (0, 0);
174	if (!SvPADBUSY (sv))
175	SvPADMY_on (sv);
176	npad[ix] = sv;
177	}	252	}
178	}	253	}
179	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	254
		255	SvREFCNT_dec ((SV*)padlist);
		256	}
		257	}
		258
		259	static int
		260	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		261	{
		262	AV *padlist;
		263	AV *av = (AV *)mg->mg_obj;
		264
		265	/* casting is fun. */
		266	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		267	free_padlist (aTHX_ padlist);
		268
		269	SvREFCNT_dec (av);
		270
		271	return 0;
		272	}
		273
		274	#define PERL_MAGIC_coro PERL_MAGIC_ext
		275
		276	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		277
		278	#define CORO_MAGIC(cv) \
		279	SvMAGIC (cv) \
		280	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		281	? SvMAGIC (cv) \
		282	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		283	: 0
		284
		285	/* the next two functions merely cache the padlists */
		286	static void
		287	get_padlist (pTHX_ CV *cv)
		288	{
		289	MAGIC *mg = CORO_MAGIC (cv);
		290	AV *av;
		291
		292	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		293	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		294	else
		295	{
		296	#if CORO_PREFER_PERL_FUNCTIONS
		297	/* this is probably cleaner, but also slower? */
		298	CV *cp = Perl_cv_clone (cv);
		299	CvPADLIST (cv) = CvPADLIST (cp);
		300	CvPADLIST (cp) = 0;
		301	SvREFCNT_dec (cp);
		302	#else
		303	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		304	#endif
		305	}
		306	}
		307
		308	static void
		309	put_padlist (pTHX_ CV *cv)
		310	{
		311	MAGIC *mg = CORO_MAGIC (cv);
		312	AV *av;
		313
		314	if (!mg)
		315	{
		316	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		317	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		318	mg->mg_virtual = &vtbl_coro;
		319	mg->mg_obj = (SV *)newAV ();
		320	}
		321
		322	av = (AV *)mg->mg_obj;
		323
		324	if (AvFILLp (av) >= AvMAX (av))
		325	av_extend (av, AvMAX (av) + 1);
		326
		327	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		328	}
		329
		330	/** load & save, init *******************************************************/
		331
		332	#define SB do {
		333	#define SE } while (0)
		334
		335	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
		336
		337	static void
		338	load_perl (pTHX_ Coro__State c)
		339	{
		340	#define VAR(name,type) PL_ ## name = c->name;
		341	# include "state.h"
		342	#undef VAR
		343
		344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		347	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		348
		349	if (c->irssv)
		350	{
		351	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
180	{	352	{
181	npad[ix] = SvREFCNT_inc (ppad[ix]);	353	SvREFCNT_dec (c->irssv);
		354	c->irssv = 0;
182	}	355	}
183	else	356	else
184	{	357	{
185	SV *sv = NEWSV (0, 0);	358	REPLACE_SV (PL_rs, c->irssv);
186	SvPADTMP_on (sv);	359	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
187	npad[ix] = sv;	360	sv_setsv (c->irssv_sv, PL_rs);
188	}	361	}
189	}	362	}
190
191	#if 0 /* return -ENOTUNDERSTOOD */
192	/* Now that vars are all in place, clone nested closures. */
193
194	for (ix = fpad; ix > 0; ix--) {
195	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
196	if (namesv
197	&& namesv != &PL_sv_undef
198	&& !(SvFLAGS(namesv) & SVf_FAKE)
199	&& *SvPVX(namesv) == '&'
200	&& CvCLONE(ppad[ix]))
201	{
202	CV *kid = cv_clone((CV*)ppad[ix]);
203	SvREFCNT_dec(ppad[ix]);
204	CvCLONE_on(kid);
205	SvPADMY_on(kid);
206	npad[ix] = (SV*)kid;
207	}
208	}
209	#endif
210
211	return newpadlist;
212	}
213
214	#ifdef MAY_FLUSH
215	STATIC AV *
216	free_padlist (AV *padlist)
217	{
218	/* may be during global destruction */
219	if (SvREFCNT(padlist))
220	{
221	I32 i = AvFILLp(padlist);
222	while (i >= 0)
223	{
224	SV **svp = av_fetch(padlist, i--, FALSE);
225	SV *sv = svp ? *svp : Nullsv;
226	if (sv)
227	SvREFCNT_dec(sv);
228	}
229
230	SvREFCNT_dec((SV*)padlist);
231	}
232	}
233	#endif
234
235	/* the next two functions merely cache the padlists */
236	STATIC void
237	get_padlist (CV *cv)
238	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
240
241	if (he && AvFILLp ((AV *)*he) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
243	else
244	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
245	}
246
247	STATIC void
248	put_padlist (CV *cv)
249	{
250	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
251
252	if (SvTYPE (*he) != SVt_PVAV)
253	{
254	SvREFCNT_dec (*he);
255	*he = (SV *)newAV ();
256	}
257
258	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
259	}
260
261	#ifdef MAY_FLUSH
262	STATIC void
263	flush_padlist_cache ()
264	{
265	HV *hv = padlist_cache;
266	padlist_cache = newHV ();
267
268	if (hv_iterinit (hv))
269	{
270	HE *he;
271	AV *padlist;
272
273	while (!!(he = hv_iternext (hv)))
274	{
275	AV *av = (AV *)HeVAL(he);
276
277	/* casting is fun. */
278	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
279	free_padlist (padlist);
280	}
281	}
282
283	SvREFCNT_dec (hv);
284	}
285	#endif
286
287	#define SB do {
288	#define SE } while (0)
289
290	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
291	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
292
293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
294
295	static void
296	load_state(pTHX_ Coro__State c)
297	{
298	PL_dowarn = c->dowarn;
299	PL_in_eval = c->in_eval;
300
301	PL_curstackinfo = c->curstackinfo;
302	PL_curstack = c->curstack;
303	PL_mainstack = c->mainstack;
304	PL_stack_sp = c->stack_sp;
305	PL_op = c->op;
306	PL_curpad = c->curpad;
307	PL_stack_base = c->stack_base;
308	PL_stack_max = c->stack_max;
309	PL_tmps_stack = c->tmps_stack;
310	PL_tmps_floor = c->tmps_floor;
311	PL_tmps_ix = c->tmps_ix;
312	PL_tmps_max = c->tmps_max;
313	PL_markstack = c->markstack;
314	PL_markstack_ptr = c->markstack_ptr;
315	PL_markstack_max = c->markstack_max;
316	PL_scopestack = c->scopestack;
317	PL_scopestack_ix = c->scopestack_ix;
318	PL_scopestack_max = c->scopestack_max;
319	PL_savestack = c->savestack;
320	PL_savestack_ix = c->savestack_ix;
321	PL_savestack_max = c->savestack_max;
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	PL_curcop = c->curcop;
326	PL_top_env = c->top_env;
327
328	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
329	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
330	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
331		363
332	{	364	{
333	dSP;	365	dSP;
334	CV *cv;	366	CV *cv;
335		367
336	/* now do the ugly restore mess */	368	/* now do the ugly restore mess */
337	while ((cv = (CV *)POPs))	369	while ((cv = (CV *)POPs))
338	{	370	{
339	AV *padlist = (AV *)POPs;
340
341	if (padlist)
342	{
343	put_padlist (cv); /* mark this padlist as available */	371	put_padlist (aTHX_ cv); /* mark this padlist as available */
344	CvPADLIST(cv) = padlist;	372	CvDEPTH (cv) = PTR2IV (POPs);
345	#ifdef USE_THREADS	373	CvPADLIST (cv) = (AV *)POPs;
346	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
347	#endif
348	}
349
350	++CvDEPTH(cv);
351	}	374	}
352		375
353	PUTBACK;	376	PUTBACK;
354	}	377	}
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
355	}	379	}
356		380
357	static void	381	static void
358	save_state(pTHX_ Coro__State c, int flags)	382	save_perl (pTHX_ Coro__State c)
359	{	383	{
		384	assert (!PL_comppad || AvARRAY (PL_comppad));//D
360	{	385	{
361	dSP;	386	dSP;
362	I32 cxix = cxstack_ix;	387	I32 cxix = cxstack_ix;
363	PERL_CONTEXT *ccstk = cxstack;	388	PERL_CONTEXT *ccstk = cxstack;
364	PERL_SI *top_si = PL_curstackinfo;	389	PERL_SI *top_si = PL_curstackinfo;
…		…
366	/*	391	/*
367	* the worst thing you can imagine happens first - we have to save	392	* the worst thing you can imagine happens first - we have to save
368	* (and reinitialize) all cv's in the whole callchain :(	393	* (and reinitialize) all cv's in the whole callchain :(
369	*/	394	*/
370		395
		396	EXTEND (SP, 3 + 1);
371	PUSHs (Nullsv);	397	PUSHs (Nullsv);
372	/* this loop was inspired by pp_caller */	398	/* this loop was inspired by pp_caller */
373	for (;;)	399	for (;;)
374	{	400	{
375	do	401	while (cxix >= 0)
376	{	402	{
377	PERL_CONTEXT *cx = &ccstk[cxix--];	403	PERL_CONTEXT *cx = &ccstk[cxix--];
378		404
379	if (CxTYPE(cx) == CXt_SUB)	405	if (CxTYPE (cx) == CXt_SUB)
380	{	406	{
381	CV *cv = cx->blk_sub.cv;	407	CV *cv = cx->blk_sub.cv;
		408
382	if (CvDEPTH(cv))	409	if (CvDEPTH (cv))
383	{	410	{
384	#ifdef USE_THREADS
385	/*XPUSHs ((SV *)CvOWNER(cv));*/
386	/*CvOWNER(cv) = 0;*/
387	/*error must unlock this cv etc.. etc...*/
388	#endif
389	EXTEND (SP, CvDEPTH(cv)*2);	411	EXTEND (SP, 3);
390
391	while (--CvDEPTH(cv))
392	{
393	/* this tells the restore code to increment CvDEPTH */
394	PUSHs (Nullsv);
395	PUSHs ((SV *)cv);
396	}
397
398	PUSHs ((SV *)CvPADLIST(cv));	412	PUSHs ((SV *)CvPADLIST (cv));
		413	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
399	PUSHs ((SV *)cv);	414	PUSHs ((SV *)cv);
400		415
401	get_padlist (cv); /* this is a monster */	416	CvDEPTH (cv) = 0;
		417	get_padlist (aTHX_ cv);
402	}	418	}
403	}	419	}
404	else if (CxTYPE(cx) == CXt_FORMAT)
405	{
406	/* I never used formats, so how should I know how these are implemented? */
407	/* my bold guess is as a simple, plain sub... */
408	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
409	}
410	}	420	}
411	while (cxix >= 0);
412		421
413	if (top_si->si_type == PERLSI_MAIN)	422	if (top_si->si_type == PERLSI_MAIN)
414	break;	423	break;
415		424
416	top_si = top_si->si_prev;	425	top_si = top_si->si_prev;
…		…
419	}	428	}
420		429
421	PUTBACK;	430	PUTBACK;
422	}	431	}
423		432
424	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	433	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
425	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	434	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
426	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	435	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		436	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		437	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
427		438
428	/* I have not the slightest idea of why av_reify is necessary */	439	#define VAR(name,type)c->name = PL_ ## name;
429	/* but if it's missing the defav contents magically get replaced sometimes */	440	# include "state.h"
430	if (c->defav)	441	#undef VAR
431	av_reify (c->defav);
432
433	c->dowarn = PL_dowarn;
434	c->in_eval = PL_in_eval;
435
436	c->curstackinfo = PL_curstackinfo;
437	c->curstack = PL_curstack;
438	c->mainstack = PL_mainstack;
439	c->stack_sp = PL_stack_sp;
440	c->op = PL_op;
441	c->curpad = PL_curpad;
442	c->stack_base = PL_stack_base;
443	c->stack_max = PL_stack_max;
444	c->tmps_stack = PL_tmps_stack;
445	c->tmps_floor = PL_tmps_floor;
446	c->tmps_ix = PL_tmps_ix;
447	c->tmps_max = PL_tmps_max;
448	c->markstack = PL_markstack;
449	c->markstack_ptr = PL_markstack_ptr;
450	c->markstack_max = PL_markstack_max;
451	c->scopestack = PL_scopestack;
452	c->scopestack_ix = PL_scopestack_ix;
453	c->scopestack_max = PL_scopestack_max;
454	c->savestack = PL_savestack;
455	c->savestack_ix = PL_savestack_ix;
456	c->savestack_max = PL_savestack_max;
457	c->retstack = PL_retstack;
458	c->retstack_ix = PL_retstack_ix;
459	c->retstack_max = PL_retstack_max;
460	c->curcop = PL_curcop;
461	c->top_env = PL_top_env;
462	}	442	}
463		443
464	/*	444	/*
465	* allocate various perl stacks. This is an exact copy	445	* allocate various perl stacks. This is an exact copy
466	* of perl.c:init_stacks, except that it uses less memory	446	* of perl.c:init_stacks, except that it uses less memory
467	* on the assumption that coroutines do not usually need	447	* on the (sometimes correct) assumption that coroutines do
468	* a lot of stackspace.	448	* not usually need a lot of stackspace.
469	*/	449	*/
470	STATIC void	450	#if CORO_PREFER_PERL_FUNCTIONS
		451	# define coro_init_stacks init_stacks
		452	#else
		453	static void
471	coro_init_stacks (pTHX)	454	coro_init_stacks (pTHX)
472	{	455	{
473	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	456	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
474	PL_curstackinfo->si_type = PERLSI_MAIN;	457	PL_curstackinfo->si_type = PERLSI_MAIN;
475	PL_curstack = PL_curstackinfo->si_stack;	458	PL_curstack = PL_curstackinfo->si_stack;
476	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
477		460
478	PL_stack_base = AvARRAY(PL_curstack);	461	PL_stack_base = AvARRAY(PL_curstack);
479	PL_stack_sp = PL_stack_base;	462	PL_stack_sp = PL_stack_base;
480	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
481		464
482	New(50,PL_tmps_stack,96,SV*);	465	New(50,PL_tmps_stack,128,SV*);
483	PL_tmps_floor = -1;	466	PL_tmps_floor = -1;
484	PL_tmps_ix = -1;	467	PL_tmps_ix = -1;
485	PL_tmps_max = 96;	468	PL_tmps_max = 128;
486		469
487	New(54,PL_markstack,16,I32);	470	New(54,PL_markstack,32,I32);
488	PL_markstack_ptr = PL_markstack;	471	PL_markstack_ptr = PL_markstack;
489	PL_markstack_max = PL_markstack + 16;	472	PL_markstack_max = PL_markstack + 32;
490		473
		474	#ifdef SET_MARK_OFFSET
491	SET_MARK_OFFSET;	475	SET_MARK_OFFSET;
		476	#endif
492		477
493	New(54,PL_scopestack,16,I32);	478	New(54,PL_scopestack,32,I32);
494	PL_scopestack_ix = 0;	479	PL_scopestack_ix = 0;
495	PL_scopestack_max = 16;	480	PL_scopestack_max = 32;
496		481
497	New(54,PL_savestack,96,ANY);	482	New(54,PL_savestack,64,ANY);
498	PL_savestack_ix = 0;	483	PL_savestack_ix = 0;
499	PL_savestack_max = 96;	484	PL_savestack_max = 64;
500		485
		486	#if !PERL_VERSION_ATLEAST (5,9,0)
501	New(54,PL_retstack,8,OP*);	487	New(54,PL_retstack,16,OP*);
502	PL_retstack_ix = 0;	488	PL_retstack_ix = 0;
503	PL_retstack_max = 8;	489	PL_retstack_max = 16;
		490	#endif
504	}	491	}
		492	#endif
505		493
506	/*	494	/*
507	* destroy the stacks, the callchain etc...	495	* destroy the stacks, the callchain etc...
508	* still there is a memleak of 128 bytes...
509	*/	496	*/
510	STATIC void	497	static void
511	destroy_stacks(pTHX)	498	coro_destroy_stacks (pTHX)
512	{	499	{
513	/* is this ugly, I ask? */	500	if (!IN_DESTRUCT)
514	while (PL_scopestack_ix)	501	{
515	LEAVE;	502	/* restore all saved variables and stuff */
		503	LEAVE_SCOPE (0);
		504	assert (PL_tmps_floor == -1);
516		505
517	/* sure it is, but more important: is it correct?? :/ */	506	/* free all temporaries */
518	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
519	FREETMPS;	507	FREETMPS;
		508	assert (PL_tmps_ix == -1);
		509
		510	/* unwind all extra stacks */
		511	POPSTACK_TO (PL_mainstack);
		512
		513	/* unwind main stack */
		514	dounwind (-1);
		515	}
520		516
521	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
522	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
523		519
524	while (PL_curstackinfo)	520	while (PL_curstackinfo)
525	{	521	{
526	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
527		523
528	{	524	if (!IN_DESTRUCT)
529	dSP;
530	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
531	PUTBACK; /* possibly superfluous */
532	}
533
534	dounwind(-1);
535
536	SvREFCNT_dec(PL_curstackinfo->si_stack);	525	SvREFCNT_dec (PL_curstackinfo->si_stack);
		526
537	Safefree(PL_curstackinfo->si_cxstack);	527	Safefree (PL_curstackinfo->si_cxstack);
538	Safefree(PL_curstackinfo);	528	Safefree (PL_curstackinfo);
539	PL_curstackinfo = p;	529	PL_curstackinfo = p;
540	}	530	}
541		531
542	Safefree(PL_tmps_stack);	532	Safefree (PL_tmps_stack);
543	Safefree(PL_markstack);	533	Safefree (PL_markstack);
544	Safefree(PL_scopestack);	534	Safefree (PL_scopestack);
545	Safefree(PL_savestack);	535	Safefree (PL_savestack);
		536	#if !PERL_VERSION_ATLEAST (5,9,0)
546	Safefree(PL_retstack);	537	Safefree (PL_retstack);
547	}
548
549	static void
550	allocate_stack (Coro__State ctx, int alloc)
551	{
552	coro_stack *stack;
553
554	New (0, stack, 1, coro_stack);
555
556	stack->refcnt = 1;
557	stack->usecnt = 1;
558	stack->gencnt = ctx->gencnt = 0;
559	if (alloc)
560	{
561	#ifdef HAVE_MMAP
562	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
563	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
564	if (stack->sptr == (void *)-1)
565	#endif	538	#endif
566	{
567	/*FIXME*//*D*//* reasonable stack size! */
568	stack->ssize = -4096 * sizeof (long);
569	New (0, stack->sptr, 4096, long);
570	}
571	}
572	else
573	stack->sptr = 0;
574
575	ctx->stack = stack;
576	}	539	}
577		540
578	static void	541	/** coroutine stack handling ************************************************/
579	deallocate_stack (Coro__State ctx)
580	{
581	coro_stack *stack = ctx->stack;
582		542
583	ctx->stack = 0;
584
585	if (stack)
586	{
587	if (!--stack->refcnt)
588	{
589	#ifdef HAVE_MMAP
590	if (stack->ssize > 0 && stack->sptr)
591	munmap (stack->sptr, stack->ssize);
592	else
593	#else
594	Safefree (stack->sptr);
595	#endif
596	Safefree (stack);
597	}
598	else if (ctx->gencnt == stack->gencnt)
599	--stack->usecnt;
600	}
601	}
602
603	static void	543	static void
604	setup_coro (void *arg)	544	setup_coro (pTHX_ struct coro *coro)
605	{	545	{
606	/*	546	/*
607	* emulate part of the perl startup here.	547	* emulate part of the perl startup here.
608	*/	548	*/
		549	coro_init_stacks (aTHX);
		550
		551	PL_curcop = &PL_compiling;
		552	PL_in_eval = EVAL_NULL;
		553	PL_comppad = 0;
		554	PL_curpm = 0;
		555	PL_localizing = 0;
		556	PL_dirty = 0;
		557	PL_restartop = 0;
		558
		559	{
		560	dSP;
		561	LOGOP myop;
		562
		563	SvREFCNT_dec (GvAV (PL_defgv));
		564	GvAV (PL_defgv) = coro->args; coro->args = 0;
		565
		566	Zero (&myop, 1, LOGOP);
		567	myop.op_next = Nullop;
		568	myop.op_flags = OPf_WANT_VOID;
		569
		570	PUSHMARK (SP);
		571	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		572	PUTBACK;
		573	PL_op = (OP *)&myop;
		574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		575	SPAGAIN;
		576	}
		577
		578	ENTER; /* necessary e.g. for dounwind */
		579	}
		580
		581	static void
		582	free_coro_mortal (pTHX)
		583	{
		584	if (coro_mortal)
		585	{
		586	SvREFCNT_dec (coro_mortal);
		587	coro_mortal = 0;
		588	}
		589	}
		590
		591	/* inject a fake call to Coro::State::_cctx_init into the execution */
		592	static void NOINLINE
		593	prepare_cctx (pTHX_ coro_cctx *cctx)
		594	{
609	dSP;	595	dSP;
610	Coro__State ctx = (Coro__State)arg;	596	LOGOP myop;
611	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
612		597
613	coro_init_stacks (aTHX);	598	Zero (&myop, 1, LOGOP);
614	/*PL_curcop = 0;*/	599	myop.op_next = PL_op;
615	/*PL_in_eval = PL_in_eval;*/ /* inherit */	600	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
616	SvREFCNT_dec (GvAV (PL_defgv));
617	GvAV (PL_defgv) = ctx->args;
618		601
		602	PUSHMARK (SP);
		603	EXTEND (SP, 2);
		604	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		605	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		606	PUTBACK;
		607	PL_op = (OP *)&myop;
		608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
619	SPAGAIN;	609	SPAGAIN;
620
621	if (ctx->stack)
622	{
623	ctx->cursp = 0;
624
625	PUSHMARK(SP);
626	PUTBACK;
627	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
628
629	if (SvTRUE (ERRSV))
630	croak (NULL);
631	else
632	croak ("FATAL: CCTXT coroutine returned!");
633	}
634	else
635	{
636	UNOP myop;
637
638	PL_op = (OP *)&myop;
639
640	Zero(&myop, 1, UNOP);
641	myop.op_next = Nullop;
642	myop.op_flags = OPf_WANT_VOID;
643
644	PUSHMARK(SP);
645	XPUSHs (sub_init);
646	/*
647	* the next line is slightly wrong, as PL_op->op_next
648	* is actually being executed so we skip the first op.
649	* that doesn't matter, though, since it is only
650	* pp_nextstate and we never return...
651	* ah yes, and I don't care anyways ;)
652	*/
653	PUTBACK;
654	PL_op = pp_entersub();
655	SPAGAIN;
656
657	ENTER; /* necessary e.g. for dounwind */
658	}
659	}	610	}
660		611
661	static void	612	static void
662	continue_coro (void *arg)	613	coro_run (void *arg)
663	{	614	{
		615	dTHX;
		616
		617	/* coro_run is the alternative tail of transfer(), so unlock here. */
		618	UNLOCK;
		619
664	/*	620	/*
665	* this is a _very_ stripped down perl interpreter ;)	621	* this is a _very_ stripped down perl interpreter ;)
666	*/	622	*/
667	Coro__State ctx = (Coro__State)arg;	623	PL_top_env = &PL_start_env;
668		624
669	/*FIXME*//* must set up top_env here */	625	/* inject call to cctx_init */
670	ctx->cursp = 0;	626	prepare_cctx (aTHX_ (coro_cctx *)arg);
		627
		628	/* somebody will hit me for both perl_run and PL_restartop */
		629	PL_restartop = PL_op;
		630	perl_run (PL_curinterp);
		631
		632	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		633	abort ();
		634	}
		635
		636	static coro_cctx *
		637	cctx_new ()
		638	{
		639	coro_cctx *cctx;
		640	void *stack_start;
		641	size_t stack_size;
		642
		643	++cctx_count;
		644
		645	Newz (0, cctx, 1, coro_cctx);
		646
		647	#if HAVE_MMAP
		648
		649	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		650	/* mmap supposedly does allocate-on-write for us */
		651	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		652
		653	if (cctx->sptr != (void *)-1)
		654	{
		655	# if CORO_STACKGUARD
		656	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		657	# endif
		658	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		659	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		660	cctx->mapped = 1;
		661	}
		662	else
		663	#endif
		664	{
		665	cctx->ssize = coro_stacksize * (long)sizeof (long);
		666	New (0, cctx->sptr, coro_stacksize, long);
		667
		668	if (!cctx->sptr)
		669	{
		670	perror ("FATAL: unable to allocate stack for coroutine");
		671	_exit (EXIT_FAILURE);
		672	}
		673
		674	stack_start = cctx->sptr;
		675	stack_size = cctx->ssize;
		676	}
		677
		678	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		679	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		680
		681	return cctx;
		682	}
		683
		684	static void
		685	cctx_destroy (coro_cctx *cctx)
		686	{
		687	if (!cctx)
		688	return;
		689
		690	--cctx_count;
		691
		692	#if CORO_USE_VALGRIND
		693	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		694	#endif
		695
		696	#if HAVE_MMAP
		697	if (cctx->mapped)
		698	munmap (cctx->sptr, cctx->ssize);
		699	else
		700	#endif
		701	Safefree (cctx->sptr);
		702
		703	Safefree (cctx);
		704	}
		705
		706	static coro_cctx *
		707	cctx_get (pTHX)
		708	{
		709	while (cctx_first)
		710	{
		711	coro_cctx *cctx = cctx_first;
		712	cctx_first = cctx->next;
		713	--cctx_idle;
		714
		715	if (cctx->ssize >= coro_stacksize)
		716	return cctx;
		717
		718	cctx_destroy (cctx);
		719	}
		720
671	PL_op = PL_op->op_next;	721	PL_op = PL_op->op_next;
672	CALLRUNOPS(aTHX);	722	return cctx_new ();
673
674	abort ();
675	}	723	}
676		724
677	STATIC void	725	static void
		726	cctx_put (coro_cctx *cctx)
		727	{
		728	/* free another cctx if overlimit */
		729	if (cctx_idle >= MAX_IDLE_CCTX)
		730	{
		731	coro_cctx *first = cctx_first;
		732	cctx_first = first->next;
		733	--cctx_idle;
		734
		735	assert (!first->inuse);
		736	cctx_destroy (first);
		737	}
		738
		739	++cctx_idle;
		740	cctx->next = cctx_first;
		741	cctx_first = cctx;
		742	}
		743
		744	/** coroutine switching *****************************************************/
		745
		746	/* never call directly, always through the coro_state_transfer global variable */
		747	static void NOINLINE
678	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	748	transfer (pTHX_ struct coro *prev, struct coro *next)
679	{	749	{
680	dSP;
681	dSTACKLEVEL;	750	dSTACKLEVEL;
682		751
		752	/* sometimes transfer is only called to set idle_sp */
		753	if (!next)
		754	{
		755	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		756	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		757	}
683	if (prev != next)	758	else if (prev != next)
684	{	759	{
685	if (next->mainstack)	760	coro_cctx *prev__cctx;
		761
		762	if (prev->flags & CF_NEW)
686	{	763	{
687	SAVE (prev, flags);	764	/* create a new empty context */
688	LOAD (next);	765	Newz (0, prev->cctx, 1, coro_cctx);
689		766	prev->cctx->inuse = 1;
690	/* mark this state as in-use */	767	prev->flags &= ~CF_NEW;
691	next->mainstack = 0;	768	prev->flags |= CF_RUNNING;
692	next->tmps_ix = -2;
693
694	/* stacklevel changed? if yes, grab the stack for us! */
695	if (flags & TRANSFER_SAVE_CCTXT)
696	{
697	if (!prev->stack)
698	allocate_stack (prev, 0);
699	else if (prev->cursp != stacklevel
700	&& prev->stack->usecnt > 1)
701	{
702	prev->gencnt = ++prev->stack->gencnt;
703	prev->stack->usecnt = 1;
704	}
705
706	/* has our stack been invalidated? */
707	if (next->stack && next->stack->gencnt != next->gencnt)
708	{
709	deallocate_stack (next);
710	allocate_stack (next, 1);
711	coro_create (&(next->stack->cctx),
712	continue_coro, (void *)next,
713	next->stack->sptr, labs (next->stack->ssize));
714	}
715
716	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
717	}
718
719	}	769	}
720	else if (next->tmps_ix == -2)	770
721	croak ("tried to transfer to running coroutine");	771	/*TODO: must not croak here */
		772	if (!prev->flags & CF_RUNNING)
		773	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		774
		775	if (next->flags & CF_RUNNING)
		776	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		777
		778	if (next->flags & CF_DESTROYED)
		779	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		780
		781	prev->flags &= ~CF_RUNNING;
		782	next->flags |= CF_RUNNING;
		783
		784	LOCK;
		785
		786	if (next->flags & CF_NEW)
		787	{
		788	/* need to start coroutine */
		789	next->flags &= ~CF_NEW;
		790	/* first get rid of the old state */
		791	save_perl (aTHX_ prev);
		792	/* setup coroutine call */
		793	setup_coro (aTHX_ next);
		794	/* need a new stack */
		795	assert (!next->cctx);
		796	}
722	else	797	else
723	{	798	{
724	SAVE (prev, -1); /* first get rid of the old state */	799	/* coroutine already started */
725		800	save_perl (aTHX_ prev);
726	if (flags & TRANSFER_SAVE_CCTXT)	801	load_perl (aTHX_ next);
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	setup_coro (next);
734
735	prev->stack->refcnt++;
736	prev->stack->usecnt++;
737	next->stack = prev->stack;
738	next->gencnt = prev->gencnt;
739	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	}
748	}
749	else
750	setup_coro (next);
751	}	802	}
		803
		804	prev__cctx = prev->cctx;
		805
		806	/* possibly "free" the cctx */
		807	if (prev__cctx->idle_sp == STACKLEVEL)
		808	{
		809	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		810	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		811
		812	prev->cctx = 0;
		813
		814	cctx_put (prev__cctx);
		815	prev__cctx->inuse = 0;
		816	}
		817
		818	if (!next->cctx)
		819	{
		820	next->cctx = cctx_get (aTHX);
		821	assert (!next->cctx->inuse);
		822	next->cctx->inuse = 1;
		823	}
		824
		825	if (prev__cctx != next->cctx)
		826	{
		827	prev__cctx->top_env = PL_top_env;
		828	PL_top_env = next->cctx->top_env;
		829	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		830	}
		831
		832	free_coro_mortal (aTHX);
		833	UNLOCK;
		834	}
		835	}
		836
		837	struct transfer_args
		838	{
		839	struct coro *prev, *next;
		840	};
		841
		842	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		843
		844	/** high level stuff ********************************************************/
		845
		846	static int
		847	coro_state_destroy (pTHX_ struct coro *coro)
		848	{
		849	if (coro->flags & CF_DESTROYED)
		850	return 0;
		851
		852	coro->flags |= CF_DESTROYED;
		853
		854	if (coro->flags & CF_READY)
752	}	855	{
		856	/* reduce nready, as destroying a ready coro effectively unreadies it */
		857	/* alternative: look through all ready queues and remove the coro */
		858	LOCK;
		859	--coro_nready;
		860	UNLOCK;
		861	}
		862	else
		863	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
753		864
754	next->cursp = stacklevel;	865	if (coro->mainstack && coro->mainstack != main_mainstack)
		866	{
		867	struct coro temp;
		868
		869	assert (!(coro->flags & CF_RUNNING));
		870
		871	Zero (&temp, 1, struct coro);
		872	temp.save = CORO_SAVE_DEF;
		873
		874	if (coro->flags & CF_RUNNING)
		875	croak ("FATAL: tried to destroy currently running coroutine");
		876
		877	save_perl (aTHX_ &temp);
		878	load_perl (aTHX_ coro);
		879
		880	coro_destroy_stacks (aTHX);
		881
		882	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		883
		884	coro->mainstack = 0;
		885	}
		886
		887	cctx_destroy (coro->cctx);
		888	SvREFCNT_dec (coro->args);
		889
		890	return 1;
755	}	891	}
		892
		893	static int
		894	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		895	{
		896	struct coro *coro = (struct coro *)mg->mg_ptr;
		897	mg->mg_ptr = 0;
		898
		899	if (--coro->refcnt < 0)
		900	{
		901	coro_state_destroy (aTHX_ coro);
		902	Safefree (coro);
		903	}
		904
		905	return 0;
		906	}
		907
		908	static int
		909	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		910	{
		911	struct coro *coro = (struct coro *)mg->mg_ptr;
		912
		913	++coro->refcnt;
		914
		915	return 0;
		916	}
		917
		918	static MGVTBL coro_state_vtbl = {
		919	0, 0, 0, 0,
		920	coro_state_free,
		921	0,
		922	#ifdef MGf_DUP
		923	coro_state_dup,
		924	#else
		925	# define MGf_DUP 0
		926	#endif
		927	};
756		928
757	static struct coro *	929	static struct coro *
758	sv_to_coro (SV *arg, const char *funcname, const char *varname)	930	SvSTATE_ (pTHX_ SV *coro)
759	{	931	{
760	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	932	HV *stash;
		933	MAGIC *mg;
		934
		935	if (SvROK (coro))
		936	coro = SvRV (coro);
		937
		938	stash = SvSTASH (coro);
		939	if (stash != coro_stash && stash != coro_state_stash)
761	{	940	{
762	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	941	/* very slow, but rare, check */
763		942	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
764	if (!he)	943	croak ("Coro::State object required");
765	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
766
767	arg = HeVAL(he);
768	}	944	}
		945
		946	mg = CORO_MAGIC (coro);
		947	return (struct coro *)mg->mg_ptr;
		948	}
		949
		950	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		951
		952	static void
		953	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		954	{
		955	ta->prev = SvSTATE (prev_sv);
		956	ta->next = SvSTATE (next_sv);
		957	}
		958
		959	static void
		960	api_transfer (SV *prev_sv, SV *next_sv)
		961	{
		962	dTHX;
		963	struct transfer_args ta;
		964
		965	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		966	TRANSFER (ta);
		967	}
		968
		969	static int
		970	api_save (SV *coro_sv, int new_save)
		971	{
		972	dTHX;
		973	struct coro *coro = SvSTATE (coro_sv);
		974	int old_save = coro->save;
		975
		976	if (new_save >= 0)
		977	coro->save = new_save;
		978
		979	return old_save;
		980	}
		981
		982	/** Coro ********************************************************************/
		983
		984	static void
		985	coro_enq (pTHX_ SV *coro_sv)
		986	{
		987	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		988	}
		989
		990	static SV *
		991	coro_deq (pTHX_ int min_prio)
		992	{
		993	int prio = PRIO_MAX - PRIO_MIN;
		994
		995	min_prio -= PRIO_MIN;
		996	if (min_prio < 0)
		997	min_prio = 0;
		998
		999	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1000	if (AvFILLp (coro_ready [prio]) >= 0)
		1001	return av_shift (coro_ready [prio]);
		1002
		1003	return 0;
		1004	}
		1005
		1006	static int
		1007	api_ready (SV *coro_sv)
		1008	{
		1009	dTHX;
		1010	struct coro *coro;
		1011
		1012	if (SvROK (coro_sv))
		1013	coro_sv = SvRV (coro_sv);
		1014
		1015	coro = SvSTATE (coro_sv);
		1016
		1017	if (coro->flags & CF_READY)
		1018	return 0;
		1019
		1020	coro->flags |= CF_READY;
		1021
		1022	LOCK;
		1023	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1024	++coro_nready;
		1025	UNLOCK;
		1026
		1027	return 1;
		1028	}
		1029
		1030	static int
		1031	api_is_ready (SV *coro_sv)
		1032	{
		1033	dTHX;
		1034	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1035	}
		1036
		1037	static void
		1038	prepare_schedule (pTHX_ struct transfer_args *ta)
		1039	{
		1040	SV *prev_sv, *next_sv;
		1041
		1042	for (;;)
		1043	{
		1044	LOCK;
		1045	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1046
		1047	/* nothing to schedule: call the idle handler */
		1048	if (!next_sv)
769		1049	{
770	/* must also be changed inside Coro::Cont::yield */	1050	dSP;
771	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)	1051	UNLOCK;
772	return (struct coro *) SvIV((SV*)SvRV(arg));	1052
		1053	ENTER;
		1054	SAVETMPS;
		1055
		1056	PUSHMARK (SP);
		1057	PUTBACK;
		1058	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1059
		1060	FREETMPS;
		1061	LEAVE;
		1062	continue;
		1063	}
		1064
		1065	ta->next = SvSTATE (next_sv);
		1066
		1067	/* cannot transfer to destroyed coros, skip and look for next */
		1068	if (ta->next->flags & CF_DESTROYED)
		1069	{
		1070	UNLOCK;
		1071	SvREFCNT_dec (next_sv);
		1072	/* coro_nready is already taken care of by destroy */
		1073	continue;
		1074	}
		1075
		1076	--coro_nready;
		1077	UNLOCK;
		1078	break;
		1079	}
		1080
		1081	/* free this only after the transfer */
		1082	prev_sv = SvRV (coro_current);
		1083	SvRV_set (coro_current, next_sv);
		1084	ta->prev = SvSTATE (prev_sv);
		1085
		1086	assert (ta->next->flags & CF_READY);
		1087	ta->next->flags &= ~CF_READY;
		1088
		1089	LOCK;
		1090	free_coro_mortal (aTHX);
		1091	coro_mortal = prev_sv;
		1092	UNLOCK;
		1093	}
		1094
		1095	static void
		1096	prepare_cede (pTHX_ struct transfer_args *ta)
		1097	{
		1098	api_ready (coro_current);
		1099	prepare_schedule (aTHX_ ta);
		1100	}
		1101
		1102	static int
		1103	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1104	{
		1105	if (coro_nready)
		1106	{
		1107	SV *prev = SvRV (coro_current);
		1108	prepare_schedule (aTHX_ ta);
		1109	api_ready (prev);
		1110	return 1;
		1111	}
773	else	1112	else
774	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	1113	return 0;
		1114	}
		1115
		1116	static void
		1117	api_schedule (void)
		1118	{
		1119	dTHX;
		1120	struct transfer_args ta;
		1121
		1122	prepare_schedule (aTHX_ &ta);
		1123	TRANSFER (ta);
		1124	}
		1125
		1126	static int
		1127	api_cede (void)
		1128	{
		1129	dTHX;
		1130	struct transfer_args ta;
		1131
		1132	prepare_cede (aTHX_ &ta);
		1133
		1134	if (ta.prev != ta.next)
		1135	{
		1136	TRANSFER (ta);
		1137	return 1;
		1138	}
		1139	else
		1140	return 0;
		1141	}
		1142
		1143	static int
		1144	api_cede_notself (void)
		1145	{
		1146	dTHX;
		1147	struct transfer_args ta;
		1148
		1149	if (prepare_cede_notself (aTHX_ &ta))
		1150	{
		1151	TRANSFER (ta);
		1152	return 1;
		1153	}
		1154	else
		1155	return 0;
775	}	1156	}
776		1157
777	MODULE = Coro::State PACKAGE = Coro::State	1158	MODULE = Coro::State PACKAGE = Coro::State
778		1159
779	PROTOTYPES: ENABLE	1160	PROTOTYPES: DISABLE
780		1161
781	BOOT:	1162	BOOT:
782	{ /* {} necessary for stoopid perl-5.6.x */	1163	{
783	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1164	#ifdef USE_ITHREADS
784	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1165	MUTEX_INIT (&coro_mutex);
		1166	#endif
		1167	BOOT_PAGESIZE;
		1168
785	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1169	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
786		1170
787	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1171	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
788	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1172	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
789	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1173	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1174	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1175	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
790	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1176	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
791		1177	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
792	if (!padlist_cache)
793	padlist_cache = newHV ();
794		1178
795	main_mainstack = PL_mainstack;	1179	main_mainstack = PL_mainstack;
796	}
797		1180
798	Coro::State	1181	coroapi.ver = CORO_API_VERSION;
799	_newprocess(args)	1182	coroapi.transfer = api_transfer;
800	SV * args	1183
801	PROTOTYPE: $	1184	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1185	}
		1186
		1187	SV *
		1188	new (char *klass, ...)
802	CODE:	1189	CODE:
803	Coro__State coro;	1190	{
		1191	struct coro *coro;
		1192	HV *hv;
		1193	int i;
804		1194
805	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
806	croak ("Coro::State::_newprocess expects an arrayref");
807
808	New (0, coro, 1, struct coro);	1195	Newz (0, coro, 1, struct coro);
		1196	coro->args = newAV ();
		1197	coro->save = CORO_SAVE_DEF;
		1198	coro->flags = CF_NEW;
809		1199
810	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1200	hv = newHV ();
811	coro->mainstack = 0; /* actual work is done inside transfer */	1201	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
812	coro->stack = 0;	1202	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
813		1203
814	RETVAL = coro;	1204	for (i = 1; i < items; i++)
		1205	av_push (coro->args, newSVsv (ST (i)));
		1206	}
815	OUTPUT:	1207	OUTPUT:
816	RETVAL	1208	RETVAL
817		1209
		1210	int
		1211	save (SV *coro, int new_save = -1)
		1212	CODE:
		1213	RETVAL = api_save (coro, new_save);
		1214	OUTPUT:
		1215	RETVAL
		1216
		1217	int
		1218	save_also (SV *coro_sv, int save_also)
		1219	CODE:
		1220	{
		1221	struct coro *coro = SvSTATE (coro_sv);
		1222	RETVAL = coro->save;
		1223	coro->save |= save_also;
		1224	}
		1225	OUTPUT:
		1226	RETVAL
		1227
818	void	1228	void
819	transfer(prev, next, flags)	1229	_set_stacklevel (...)
820	Coro::State_or_hashref prev	1230	ALIAS:
821	Coro::State_or_hashref next	1231	Coro::State::transfer = 1
822	int flags	1232	Coro::schedule = 2
823	PROTOTYPE: @	1233	Coro::cede = 3
		1234	Coro::cede_notself = 4
824	CODE:	1235	CODE:
825	PUTBACK;	1236	{
826	transfer (aTHX_ prev, next, flags);	1237	struct transfer_args ta;
827	SPAGAIN;	1238
		1239	switch (ix)
		1240	{
		1241	case 0:
		1242	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1243	ta.next = 0;
		1244	break;
		1245
		1246	case 1:
		1247	if (items != 2)
		1248	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1249
		1250	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1251	break;
		1252
		1253	case 2:
		1254	prepare_schedule (aTHX_ &ta);
		1255	break;
		1256
		1257	case 3:
		1258	prepare_cede (aTHX_ &ta);
		1259	break;
		1260
		1261	case 4:
		1262	if (!prepare_cede_notself (aTHX_ &ta))
		1263	XSRETURN_EMPTY;
		1264
		1265	break;
		1266	}
		1267
		1268	BARRIER;
		1269	TRANSFER (ta);
		1270
		1271	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1272	XSRETURN_YES;
		1273	}
		1274
		1275	bool
		1276	_destroy (SV *coro_sv)
		1277	CODE:
		1278	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1279	OUTPUT:
		1280	RETVAL
828		1281
829	void	1282	void
830	DESTROY(coro)
831	Coro::State coro
832	CODE:
833
834	if (coro->mainstack && coro->mainstack != main_mainstack)
835	{
836	struct coro temp;
837
838	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
839	LOAD(aTHX_ coro);
840
841	destroy_stacks (aTHX);
842
843	LOAD((&temp)); /* this will get rid of defsv etc.. */
844
845	coro->mainstack = 0;
846	}
847
848	deallocate_stack (coro);
849
850	Safefree (coro);
851
852	void
853	flush()
854	CODE:
855	#ifdef MAY_FLUSH
856	flush_padlist_cache ();
857	#endif
858
859	void
860	_exit(code)	1283	_exit (code)
861	int code	1284	int code
862	PROTOTYPE: $	1285	PROTOTYPE: $
863	CODE:	1286	CODE:
864	#if defined(__GLIBC__) || _POSIX_C_SOURCE
865	_exit (code);	1287	_exit (code);
866	#else
867	signal (SIGTERM, SIG_DFL);
868	raise (SIGTERM);
869	exit (code);
870	#endif
871		1288
		1289	int
		1290	cctx_stacksize (int new_stacksize = 0)
		1291	CODE:
		1292	RETVAL = coro_stacksize;
		1293	if (new_stacksize)
		1294	coro_stacksize = new_stacksize;
		1295	OUTPUT:
		1296	RETVAL
		1297
		1298	int
		1299	cctx_count ()
		1300	CODE:
		1301	RETVAL = cctx_count;
		1302	OUTPUT:
		1303	RETVAL
		1304
		1305	int
		1306	cctx_idle ()
		1307	CODE:
		1308	RETVAL = cctx_idle;
		1309	OUTPUT:
		1310	RETVAL
		1311
872	MODULE = Coro::State PACKAGE = Coro::Cont	1312	MODULE = Coro::State PACKAGE = Coro
873		1313
874	# this is slightly dirty (should expose a c-level api)	1314	BOOT:
		1315	{
		1316	int i;
		1317
		1318	coro_stash = gv_stashpv ("Coro", TRUE);
		1319
		1320	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1321	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1322	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1323	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1324	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1325	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1326
		1327	coro_current = get_sv ("Coro::current", FALSE);
		1328	SvREADONLY_on (coro_current);
		1329
		1330	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1331	coro_ready[i] = newAV ();
		1332
		1333	{
		1334	SV *sv = perl_get_sv("Coro::API", 1);
		1335
		1336	coroapi.schedule = api_schedule;
		1337	coroapi.save = api_save;
		1338	coroapi.cede = api_cede;
		1339	coroapi.cede_notself = api_cede_notself;
		1340	coroapi.ready = api_ready;
		1341	coroapi.is_ready = api_is_ready;
		1342	coroapi.nready = &coro_nready;
		1343	coroapi.current = coro_current;
		1344
		1345	GCoroAPI = &coroapi;
		1346	sv_setiv (sv, (IV)&coroapi);
		1347	SvREADONLY_on (sv);
		1348	}
		1349	}
875		1350
876	void	1351	void
877	yield(...)	1352	_set_current (SV *current)
878	PROTOTYPE: @	1353	PROTOTYPE: $
		1354	CODE:
		1355	SvREFCNT_dec (SvRV (coro_current));
		1356	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1357
		1358	int
		1359	prio (Coro::State coro, int newprio = 0)
		1360	ALIAS:
		1361	nice = 1
879	CODE:	1362	CODE:
880	static SV *returnstk;	1363	{
881	SV *sv;	1364	RETVAL = coro->prio;
882	AV *defav = GvAV (PL_defgv);
883	struct coro *prev, *next;
884		1365
885	if (!returnstk)
886	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
887
888	/* set up @_ -- ugly */
889	av_clear (defav);
890	av_fill (defav, items - 1);
891	while (items--)	1366	if (items > 1)
892	av_store (defav, items, SvREFCNT_inc (ST(items)));	1367	{
		1368	if (ix)
		1369	newprio = coro->prio - newprio;
893		1370
894	mg_get (returnstk); /* isn't documentation wrong for mg_get? */	1371	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
895	sv = av_pop ((AV *)SvRV (returnstk));	1372	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
896	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
897	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
898	SvREFCNT_dec (sv);
899		1373
900	transfer(aTHX_ prev, next, 0);	1374	coro->prio = newprio;
		1375	}
		1376	}
		1377	OUTPUT:
		1378	RETVAL
901		1379
		1380	SV *
		1381	ready (SV *self)
		1382	PROTOTYPE: $
		1383	CODE:
		1384	RETVAL = boolSV (api_ready (self));
		1385	OUTPUT:
		1386	RETVAL
		1387
		1388	SV *
		1389	is_ready (SV *self)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	RETVAL = boolSV (api_is_ready (self));
		1393	OUTPUT:
		1394	RETVAL
		1395
		1396	int
		1397	nready (...)
		1398	PROTOTYPE:
		1399	CODE:
		1400	RETVAL = coro_nready;
		1401	OUTPUT:
		1402	RETVAL
		1403
902	MODULE = Coro::State PACKAGE = Coro	1404	MODULE = Coro::State PACKAGE = Coro::AIO
903		1405
904	# this is slightly dirty (should expose a c-level api)	1406	SV *
905		1407	_get_state ()
906	BOOT:	1408	CODE:
907	{	1409	{
908	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1410	struct io_state *data;
909	coro_ready = newAV ();	1411
910	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1412	RETVAL = newSV (sizeof (struct io_state));
		1413	data = (struct io_state *)SvPVX (RETVAL);
		1414	SvCUR_set (RETVAL, sizeof (struct io_state));
		1415	SvPOK_only (RETVAL);
		1416
		1417	data->errorno = errno;
		1418	data->laststype = PL_laststype;
		1419	data->laststatval = PL_laststatval;
		1420	data->statcache = PL_statcache;
911	}	1421	}
		1422	OUTPUT:
		1423	RETVAL
912		1424
913	void	1425	void
914	ready(self)	1426	_set_state (char *data_)
915	SV * self	1427	PROTOTYPE: $
916	CODE:	1428	CODE:
917	av_push (coro_ready, SvREFCNT_inc (self));	1429	{
		1430	struct io_state *data = (void *)data_;
918		1431
919	void	1432	errno = data->errorno;
920	schedule(...)	1433	PL_laststype = data->laststype;
921	ALIAS:	1434	PL_laststatval = data->laststatval;
922	cede = 1	1435	PL_statcache = data->statcache;
923	CODE:	1436	}
924	SV *prev = GvSV (coro_current);
925	SV *next = av_shift (coro_ready);
926		1437
927	if (next == &PL_sv_undef)
928	next = SvREFCNT_inc (GvSV (coro_idle));
929
930	if (ix)
931	av_push (coro_ready, SvREFCNT_inc (prev));
932
933	GvSV (coro_current) = SvREFCNT_inc (next);
934	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
935	sv_to_coro (next, "Coro::schedule", "next coroutine"),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	SvREFCNT_dec (next);
938	SvREFCNT_dec (prev);
939

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