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Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	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"
8		10
9	#if PATCHLEVEL < 6	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
		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)
10	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
12	# endif	57	# endif
13	# ifndef call_sv	58	# ifndef call_sv
14	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
27	# endif	72	# endif
28	#endif	73	#endif
29		74
30	#include "libcoro/coro.c"	75	/* 5.8.7 */
31		76	#ifndef SvRV_set
32	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
33
34	#ifdef HAVE_MMAP
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	78	#endif
44	#endif
45		79
46	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
		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
48		92
49	/* 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
50	* 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
51	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
53		98
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		100
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	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))
57		110
58	#include "CoroAPI.h"	111	#include "CoroAPI.h"
59		112
60	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	117	#else
65	# define LOCK 0	118	# define LOCK (void)0
66	# define UNLOCK 0	119	# define UNLOCK (void)0
67	#endif	120	#endif
68		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;
69	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	134	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
75		136
76	/* this is actually not only the c stack but also c registers etc... */	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 */
77	typedef struct {	141	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	142	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		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;
82	coro_context cctx;	152	coro_context cctx;
83		153
84	void *sptr;	154	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	155	int valgrind_id;
86	} coro_stack;	156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
87		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 */
88	struct coro {	168	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	169	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	170	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	SV **stack_base;
115	SV **stack_max;
116	SV **tmps_stack;
117	I32 tmps_floor;
118	I32 tmps_ix;
119	I32 tmps_max;
120	I32 *markstack;
121	I32 *markstack_ptr;
122	I32 *markstack_max;
123	I32 *scopestack;
124	I32 scopestack_ix;
125	I32 scopestack_max;
126	ANY *savestack;
127	I32 savestack_ix;
128	I32 savestack_max;
129	OP **retstack;
130	I32 retstack_ix;
131	I32 retstack_max;
132	COP *curcop;
133	JMPENV *top_env;
134		171
135	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
136	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	SV *irssv; /* $/ */
		183	SV *irssv_sv; /* real $/ cache */
		184
		185	#define VAR(name,type) type name;
		186	# include "state.h"
		187	#undef VAR
		188
		189	/* coro process data */
		190	int prio;
137	};	191	};
138		192
139	typedef struct coro *Coro__State;	193	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	194	typedef struct coro *Coro__State_or_hashref;
141		195
142	/* mostly copied from op.c:cv_clone2 */	196	/** Coro ********************************************************************/
143	STATIC AV *	197
144	clone_padlist (pTHX_ AV *protopadlist)	198	#define PRIO_MAX 3
		199	#define PRIO_HIGH 1
		200	#define PRIO_NORMAL 0
		201	#define PRIO_LOW -1
		202	#define PRIO_IDLE -3
		203	#define PRIO_MIN -4
		204
		205	/* for Coro.pm */
		206	static SV *coro_current;
		207	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		208	static int coro_nready;
		209
		210	/** lowlevel stuff **********************************************************/
		211
		212	static AV *
		213	coro_clone_padlist (pTHX_ CV *cv)
145	{	214	{
146	AV *av;	215	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	216	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		217
165	newpadlist = newAV ();	218	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	219	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	220	#if PERL_VERSION_ATLEAST (5,9,0)
		221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		222	#else
		223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		224	#endif
		225	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		226	--AvFILLp (padlist);
		227
		228	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	229	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		230
239	return newpadlist;	231	return newpadlist;
240	}	232	}
241		233
242	STATIC void	234	static void
243	free_padlist (pTHX_ AV *padlist)	235	free_padlist (pTHX_ AV *padlist)
244	{	236	{
245	/* may be during global destruction */	237	/* may be during global destruction */
246	if (SvREFCNT (padlist))	238	if (SvREFCNT (padlist))
247	{	239	{
…		…
261		253
262	SvREFCNT_dec ((SV*)padlist);	254	SvREFCNT_dec ((SV*)padlist);
263	}	255	}
264	}	256	}
265		257
266	STATIC int	258	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	259	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	260	{
269	AV *padlist;	261	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	262	AV *av = (AV *)mg->mg_obj;
271		263
272	/* casting is fun. */	264	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	266	free_padlist (aTHX_ padlist);
275		267
276	SvREFCNT_dec (av);	268	SvREFCNT_dec (av);
		269
		270	return 0;
277	}	271	}
278		272
279	#define PERL_MAGIC_coro PERL_MAGIC_ext	273	#define PERL_MAGIC_coro PERL_MAGIC_ext
280		274
281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	275	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
282		276
		277	#define CORO_MAGIC(cv) \
		278	SvMAGIC (cv) \
		279	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		280	? SvMAGIC (cv) \
		281	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		282	: 0
		283
283	/* the next two functions merely cache the padlists */	284	/* the next two functions merely cache the padlists */
284	STATIC void	285	static void
285	get_padlist (pTHX_ CV *cv)	286	get_padlist (pTHX_ CV *cv)
286	{	287	{
287	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
288		290
289	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
290	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	293	else
		294	{
		295	#if CORO_PREFER_PERL_FUNCTIONS
		296	/* this is probably cleaner, but also slower? */
		297	CV *cp = Perl_cv_clone (cv);
		298	CvPADLIST (cv) = CvPADLIST (cp);
		299	CvPADLIST (cp) = 0;
		300	SvREFCNT_dec (cp);
		301	#else
292	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	302	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		303	#endif
		304	}
293	}	305	}
294		306
295	STATIC void	307	static void
296	put_padlist (pTHX_ CV *cv)	308	put_padlist (pTHX_ CV *cv)
297	{	309	{
298	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	310	MAGIC *mg = CORO_MAGIC (cv);
		311	AV *av;
299		312
300	if (!mg)	313	if (!mg)
301	{	314	{
302	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	315	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
303	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
304	mg->mg_virtual = &vtbl_coro;	317	mg->mg_virtual = &vtbl_coro;
305	mg->mg_obj = (SV *)newAV ();	318	mg->mg_obj = (SV *)newAV ();
306	}	319	}
307		320
308	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	321	av = (AV *)mg->mg_obj;
		322
		323	if (AvFILLp (av) >= AvMAX (av))
		324	av_extend (av, AvMAX (av) + 1);
		325
		326	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
309	}	327	}
		328
		329	/** load & save, init *******************************************************/
310		330
311	#define SB do {	331	#define SB do {
312	#define SE } while (0)	332	#define SE } while (0)
313		333
314	#define LOAD(state) load_state(aTHX_ (state));
315	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
316
317	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	334	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
318		335
319	static void	336	static void
320	load_state(pTHX_ Coro__State c)	337	load_perl (pTHX_ Coro__State c)
321	{	338	{
322	PL_dowarn = c->dowarn;	339	#define VAR(name,type) PL_ ## name = c->name;
323	PL_in_eval = c->in_eval;	340	# include "state.h"
324		341	#undef VAR
325	PL_curstackinfo = c->curstackinfo;
326	PL_curstack = c->curstack;
327	PL_mainstack = c->mainstack;
328	PL_stack_sp = c->stack_sp;
329	PL_op = c->op;
330	PL_curpad = c->curpad;
331	PL_comppad = c->comppad;
332	PL_stack_base = c->stack_base;
333	PL_stack_max = c->stack_max;
334	PL_tmps_stack = c->tmps_stack;
335	PL_tmps_floor = c->tmps_floor;
336	PL_tmps_ix = c->tmps_ix;
337	PL_tmps_max = c->tmps_max;
338	PL_markstack = c->markstack;
339	PL_markstack_ptr = c->markstack_ptr;
340	PL_markstack_max = c->markstack_max;
341	PL_scopestack = c->scopestack;
342	PL_scopestack_ix = c->scopestack_ix;
343	PL_scopestack_max = c->scopestack_max;
344	PL_savestack = c->savestack;
345	PL_savestack_ix = c->savestack_ix;
346	PL_savestack_max = c->savestack_max;
347	PL_retstack = c->retstack;
348	PL_retstack_ix = c->retstack_ix;
349	PL_retstack_max = c->retstack_max;
350	PL_curcop = c->curcop;
351	PL_top_env = c->top_env;
352		342
353	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	343	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
354	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	344	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
355	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	345	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		346	if (c->irssv)
		347	{
		348	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		349	SvREFCNT_dec (c->irssv);
		350	else
		351	{
		352	REPLACE_SV (PL_rs, c->irssv);
		353	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		354	sv_setsv (c->irssv_sv, PL_rs);
		355	}
		356	}
356		357
357	{	358	{
358	dSP;	359	dSP;
359	CV *cv;	360	CV *cv;
360		361
361	/* now do the ugly restore mess */	362	/* now do the ugly restore mess */
362	while ((cv = (CV *)POPs))	363	while ((cv = (CV *)POPs))
363	{	364	{
364	AV *padlist = (AV *)POPs;
365
366	if (padlist)
367	{
368	put_padlist (aTHX_ cv); /* mark this padlist as available */	365	put_padlist (aTHX_ cv); /* mark this padlist as available */
369	CvPADLIST(cv) = padlist;	366	CvDEPTH (cv) = PTR2IV (POPs);
370	}	367	CvPADLIST (cv) = (AV *)POPs;
371
372	++CvDEPTH(cv);
373	}	368	}
374		369
375	PUTBACK;	370	PUTBACK;
376	}	371	}
		372	assert (!PL_comppad || AvARRAY (PL_comppad));//D
377	}	373	}
378		374
379	static void	375	static void
380	save_state(pTHX_ Coro__State c, int flags)	376	save_perl (pTHX_ Coro__State c)
381	{	377	{
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
382	{	379	{
383	dSP;	380	dSP;
384	I32 cxix = cxstack_ix;	381	I32 cxix = cxstack_ix;
385	PERL_CONTEXT *ccstk = cxstack;	382	PERL_CONTEXT *ccstk = cxstack;
386	PERL_SI *top_si = PL_curstackinfo;	383	PERL_SI *top_si = PL_curstackinfo;
…		…
388	/*	385	/*
389	* the worst thing you can imagine happens first - we have to save	386	* the worst thing you can imagine happens first - we have to save
390	* (and reinitialize) all cv's in the whole callchain :(	387	* (and reinitialize) all cv's in the whole callchain :(
391	*/	388	*/
392		389
		390	EXTEND (SP, 3 + 1);
393	PUSHs (Nullsv);	391	PUSHs (Nullsv);
394	/* this loop was inspired by pp_caller */	392	/* this loop was inspired by pp_caller */
395	for (;;)	393	for (;;)
396	{	394	{
397	while (cxix >= 0)	395	while (cxix >= 0)
398	{	396	{
399	PERL_CONTEXT *cx = &ccstk[cxix--];	397	PERL_CONTEXT *cx = &ccstk[cxix--];
400		398
401	if (CxTYPE(cx) == CXt_SUB)	399	if (CxTYPE (cx) == CXt_SUB)
402	{	400	{
403	CV *cv = cx->blk_sub.cv;	401	CV *cv = cx->blk_sub.cv;
		402
404	if (CvDEPTH(cv))	403	if (CvDEPTH (cv))
405	{	404	{
406	EXTEND (SP, CvDEPTH(cv)*2);	405	EXTEND (SP, 3);
407
408	while (--CvDEPTH(cv))
409	{
410	/* this tells the restore code to increment CvDEPTH */
411	PUSHs (Nullsv);
412	PUSHs ((SV *)cv);
413	}
414
415	PUSHs ((SV *)CvPADLIST(cv));	406	PUSHs ((SV *)CvPADLIST (cv));
		407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
416	PUSHs ((SV *)cv);	408	PUSHs ((SV *)cv);
417		409
		410	CvDEPTH (cv) = 0;
418	get_padlist (aTHX_ cv); /* this is a monster */	411	get_padlist (aTHX_ cv);
419	}	412	}
420	}	413	}
421	#ifdef CXt_FORMAT
422	else if (CxTYPE(cx) == CXt_FORMAT)
423	{
424	/* I never used formats, so how should I know how these are implemented? */
425	/* my bold guess is as a simple, plain sub... */
426	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
427	}
428	#endif
429	}	414	}
430		415
431	if (top_si->si_type == PERLSI_MAIN)	416	if (top_si->si_type == PERLSI_MAIN)
432	break;	417	break;
433		418
…		…
437	}	422	}
438		423
439	PUTBACK;	424	PUTBACK;
440	}	425	}
441		426
442	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	427	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
443	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
444	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	429	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		430	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
445		431
446	c->dowarn = PL_dowarn;	432	#define VAR(name,type)c->name = PL_ ## name;
447	c->in_eval = PL_in_eval;	433	# include "state.h"
448		434	#undef VAR
449	c->curstackinfo = PL_curstackinfo;
450	c->curstack = PL_curstack;
451	c->mainstack = PL_mainstack;
452	c->stack_sp = PL_stack_sp;
453	c->op = PL_op;
454	c->curpad = PL_curpad;
455	c->comppad = PL_comppad;
456	c->stack_base = PL_stack_base;
457	c->stack_max = PL_stack_max;
458	c->tmps_stack = PL_tmps_stack;
459	c->tmps_floor = PL_tmps_floor;
460	c->tmps_ix = PL_tmps_ix;
461	c->tmps_max = PL_tmps_max;
462	c->markstack = PL_markstack;
463	c->markstack_ptr = PL_markstack_ptr;
464	c->markstack_max = PL_markstack_max;
465	c->scopestack = PL_scopestack;
466	c->scopestack_ix = PL_scopestack_ix;
467	c->scopestack_max = PL_scopestack_max;
468	c->savestack = PL_savestack;
469	c->savestack_ix = PL_savestack_ix;
470	c->savestack_max = PL_savestack_max;
471	c->retstack = PL_retstack;
472	c->retstack_ix = PL_retstack_ix;
473	c->retstack_max = PL_retstack_max;
474	c->curcop = PL_curcop;
475	c->top_env = PL_top_env;
476	}	435	}
477		436
478	/*	437	/*
479	* allocate various perl stacks. This is an exact copy	438	* allocate various perl stacks. This is an exact copy
480	* of perl.c:init_stacks, except that it uses less memory	439	* of perl.c:init_stacks, except that it uses less memory
481	* on the (sometimes correct) assumption that coroutines do	440	* on the (sometimes correct) assumption that coroutines do
482	* not usually need a lot of stackspace.	441	* not usually need a lot of stackspace.
483	*/	442	*/
484	STATIC void	443	#if CORO_PREFER_PERL_FUNCTIONS
		444	# define coro_init_stacks init_stacks
		445	#else
		446	static void
485	coro_init_stacks (pTHX)	447	coro_init_stacks (pTHX)
486	{	448	{
487	LOCK;
488
489	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
490	PL_curstackinfo->si_type = PERLSI_MAIN;	450	PL_curstackinfo->si_type = PERLSI_MAIN;
491	PL_curstack = PL_curstackinfo->si_stack;	451	PL_curstack = PL_curstackinfo->si_stack;
492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493		453
494	PL_stack_base = AvARRAY(PL_curstack);	454	PL_stack_base = AvARRAY(PL_curstack);
495	PL_stack_sp = PL_stack_base;	455	PL_stack_sp = PL_stack_base;
496	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
497		457
498	New(50,PL_tmps_stack,96,SV*);	458	New(50,PL_tmps_stack,128,SV*);
499	PL_tmps_floor = -1;	459	PL_tmps_floor = -1;
500	PL_tmps_ix = -1;	460	PL_tmps_ix = -1;
501	PL_tmps_max = 96;	461	PL_tmps_max = 128;
502		462
503	New(54,PL_markstack,16,I32);	463	New(54,PL_markstack,32,I32);
504	PL_markstack_ptr = PL_markstack;	464	PL_markstack_ptr = PL_markstack;
505	PL_markstack_max = PL_markstack + 16;	465	PL_markstack_max = PL_markstack + 32;
506		466
507	#ifdef SET_MARK_OFFSET	467	#ifdef SET_MARK_OFFSET
508	SET_MARK_OFFSET;	468	SET_MARK_OFFSET;
509	#endif	469	#endif
510		470
511	New(54,PL_scopestack,16,I32);	471	New(54,PL_scopestack,32,I32);
512	PL_scopestack_ix = 0;	472	PL_scopestack_ix = 0;
513	PL_scopestack_max = 16;	473	PL_scopestack_max = 32;
514		474
515	New(54,PL_savestack,96,ANY);	475	New(54,PL_savestack,64,ANY);
516	PL_savestack_ix = 0;	476	PL_savestack_ix = 0;
517	PL_savestack_max = 96;	477	PL_savestack_max = 64;
518		478
		479	#if !PERL_VERSION_ATLEAST (5,9,0)
519	New(54,PL_retstack,8,OP*);	480	New(54,PL_retstack,16,OP*);
520	PL_retstack_ix = 0;	481	PL_retstack_ix = 0;
521	PL_retstack_max = 8;	482	PL_retstack_max = 16;
522		483	#endif
523	UNLOCK;
524	}	484	}
		485	#endif
525		486
526	/*	487	/*
527	* destroy the stacks, the callchain etc...	488	* destroy the stacks, the callchain etc...
528	*/	489	*/
529	STATIC void	490	static void
530	destroy_stacks(pTHX)	491	coro_destroy_stacks (pTHX)
531	{	492	{
532	if (!IN_DESTRUCT)	493	if (!IN_DESTRUCT)
533	{	494	{
534	/* is this ugly, I ask? */	495	/* restore all saved variables and stuff */
535	LEAVE_SCOPE (0);	496	LEAVE_SCOPE (0);
		497	assert (PL_tmps_floor == -1);
536		498
537	/* sure it is, but more important: is it correct?? :/ */	499	/* free all temporaries */
538	FREETMPS;	500	FREETMPS;
		501	assert (PL_tmps_ix == -1);
539		502
		503	/* unwind all extra stacks */
540	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	504	POPSTACK_TO (PL_mainstack);
		505
		506	/* unwind main stack */
		507	dounwind (-1);
541	}	508	}
542		509
543	while (PL_curstackinfo->si_next)	510	while (PL_curstackinfo->si_next)
544	PL_curstackinfo = PL_curstackinfo->si_next;	511	PL_curstackinfo = PL_curstackinfo->si_next;
545		512
546	while (PL_curstackinfo)	513	while (PL_curstackinfo)
547	{	514	{
548	PERL_SI *p = PL_curstackinfo->si_prev;	515	PERL_SI *p = PL_curstackinfo->si_prev;
549		516
550	{ /*D*//*remove*/
551	dSP;
552	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
553	PUTBACK; /* possibly superfluous */
554	}
555
556	if (!IN_DESTRUCT)	517	if (!IN_DESTRUCT)
557	{
558	dounwind (-1);/*D*//*remove*/
559	SvREFCNT_dec (PL_curstackinfo->si_stack);	518	SvREFCNT_dec (PL_curstackinfo->si_stack);
560	}
561		519
562	Safefree (PL_curstackinfo->si_cxstack);	520	Safefree (PL_curstackinfo->si_cxstack);
563	Safefree (PL_curstackinfo);	521	Safefree (PL_curstackinfo);
564	PL_curstackinfo = p;	522	PL_curstackinfo = p;
565	}	523	}
566		524
567	Safefree (PL_tmps_stack);	525	Safefree (PL_tmps_stack);
568	Safefree (PL_markstack);	526	Safefree (PL_markstack);
569	Safefree (PL_scopestack);	527	Safefree (PL_scopestack);
570	Safefree (PL_savestack);	528	Safefree (PL_savestack);
		529	#if !PERL_VERSION_ATLEAST (5,9,0)
571	Safefree (PL_retstack);	530	Safefree (PL_retstack);
572	}
573
574	static void
575	allocate_stack (Coro__State ctx, int alloc)
576	{
577	coro_stack *stack;
578
579	New (0, stack, 1, coro_stack);
580
581	stack->refcnt = 1;
582	stack->usecnt = 1;
583	stack->gencnt = ctx->gencnt = 0;
584
585	if (alloc)
586	{
587	#if HAVE_MMAP
588	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
589	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
590	if (stack->sptr == (void *)-1)
591	#endif	531	#endif
592	{
593	/*FIXME*//*D*//* reasonable stack size! */
594	stack->ssize = - (8192 * sizeof (long));
595	New (0, stack->sptr, 8192, long);
596	}
597	}
598	else
599	stack->sptr = 0;
600
601	ctx->stack = stack;
602	}	532	}
603		533
604	static void	534	/** coroutine stack handling ************************************************/
605	deallocate_stack (Coro__State ctx)
606	{
607	coro_stack *stack = ctx->stack;
608		535
609	ctx->stack = 0;
610
611	if (stack)
612	{
613	if (!--stack->refcnt)
614	{
615	#ifdef HAVE_MMAP
616	if (stack->ssize > 0 && stack->sptr)
617	munmap (stack->sptr, stack->ssize);
618	else
619	#endif
620	Safefree (stack->sptr);
621
622	Safefree (stack);
623	}
624	else if (ctx->gencnt == stack->gencnt)
625	--stack->usecnt;
626	}
627	}
628
629	static void	536	static void
630	setup_coro (void *arg)	537	setup_coro (pTHX_ struct coro *coro)
631	{	538	{
632	/*	539	/*
633	* emulate part of the perl startup here.	540	* emulate part of the perl startup here.
634	*/	541	*/
		542	coro_init_stacks (aTHX);
		543
		544	PL_curcop = &PL_compiling;
		545	PL_in_eval = EVAL_NULL;
		546	PL_comppad = 0;
		547	PL_curpm = 0;
		548	PL_localizing = 0;
		549	PL_dirty = 0;
		550	PL_restartop = 0;
		551
		552	{
		553	dSP;
		554	LOGOP myop;
		555
		556	SvREFCNT_dec (GvAV (PL_defgv));
		557	GvAV (PL_defgv) = coro->args; coro->args = 0;
		558
		559	Zero (&myop, 1, LOGOP);
		560	myop.op_next = Nullop;
		561	myop.op_flags = OPf_WANT_VOID;
		562
		563	PUSHMARK (SP);
		564	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		565	PUTBACK;
		566	PL_op = (OP *)&myop;
		567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		568	SPAGAIN;
		569	}
		570
		571	ENTER; /* necessary e.g. for dounwind */
		572	}
		573
		574	static void
		575	free_coro_mortal (pTHX)
		576	{
		577	if (coro_mortal)
		578	{
		579	SvREFCNT_dec (coro_mortal);
		580	coro_mortal = 0;
		581	}
		582	}
		583
		584	/* inject a fake call to Coro::State::_cctx_init into the execution */
		585	static void NOINLINE
		586	prepare_cctx (pTHX_ coro_cctx *cctx)
		587	{
		588	dSP;
		589	LOGOP myop;
		590
		591	Zero (&myop, 1, LOGOP);
		592	myop.op_next = PL_op;
		593	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		594
		595	PUSHMARK (SP);
		596	EXTEND (SP, 2);
		597	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		598	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		599	PUTBACK;
		600	PL_op = (OP *)&myop;
		601	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		602	SPAGAIN;
		603	}
		604
		605	static void
		606	coro_run (void *arg)
		607	{
635	dTHX;	608	dTHX;
636	dSP;
637	Coro__State ctx = (Coro__State)arg;
638	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
639		609
640	coro_init_stacks (aTHX);	610	/* coro_run is the alternative tail of transfer(), so unlock here. */
641	/*PL_curcop = 0;*/	611	UNLOCK;
642	/*PL_in_eval = PL_in_eval;*/ /* inherit */
643	SvREFCNT_dec (GvAV (PL_defgv));
644	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
645		612
646	SPAGAIN;
647
648	if (ctx->stack)
649	{
650	ctx->cursp = 0;
651
652	PUSHMARK(SP);
653	PUTBACK;
654	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
655
656	if (SvTRUE (ERRSV))
657	croak (NULL);
658	else
659	croak ("FATAL: CCTXT coroutine returned!");
660	}
661	else
662	{
663	UNOP myop;
664
665	PL_op = (OP *)&myop;
666
667	Zero(&myop, 1, UNOP);
668	myop.op_next = Nullop;
669	myop.op_flags = OPf_WANT_VOID;
670
671	PUSHMARK(SP);
672	XPUSHs (sub_init);
673	/*
674	* the next line is slightly wrong, as PL_op->op_next
675	* is actually being executed so we skip the first op.
676	* that doesn't matter, though, since it is only
677	* pp_nextstate and we never return...
678	* ah yes, and I don't care anyways ;)
679	*/
680	PUTBACK;
681	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
682	SPAGAIN;
683
684	ENTER; /* necessary e.g. for dounwind */
685	}
686	}
687
688	static void
689	continue_coro (void *arg)
690	{
691	/*	613	/*
692	* this is a _very_ stripped down perl interpreter ;)	614	* this is a _very_ stripped down perl interpreter ;)
693	*/	615	*/
694	dTHX;
695	Coro__State ctx = (Coro__State)arg;
696	JMPENV coro_start_env;
697
698	PL_top_env = &ctx->start_env;	616	PL_top_env = &PL_start_env;
699		617
700	ctx->cursp = 0;	618	/* inject call to cctx_init */
		619	prepare_cctx (aTHX_ (coro_cctx *)arg);
		620
		621	/* somebody will hit me for both perl_run and PL_restartop */
		622	PL_restartop = PL_op;
		623	perl_run (PL_curinterp);
		624
		625	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		626	abort ();
		627	}
		628
		629	static coro_cctx *
		630	cctx_new ()
		631	{
		632	coro_cctx *cctx;
		633	void *stack_start;
		634	size_t stack_size;
		635
		636	++cctx_count;
		637
		638	Newz (0, cctx, 1, coro_cctx);
		639
		640	#if HAVE_MMAP
		641
		642	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		643	/* mmap supposedly does allocate-on-write for us */
		644	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		645
		646	if (cctx->sptr != (void *)-1)
		647	{
		648	# if CORO_STACKGUARD
		649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		650	# endif
		651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		653	cctx->mapped = 1;
		654	}
		655	else
		656	#endif
		657	{
		658	cctx->ssize = coro_stacksize * (long)sizeof (long);
		659	New (0, cctx->sptr, coro_stacksize, long);
		660
		661	if (!cctx->sptr)
		662	{
		663	perror ("FATAL: unable to allocate stack for coroutine");
		664	_exit (EXIT_FAILURE);
		665	}
		666
		667	stack_start = cctx->sptr;
		668	stack_size = cctx->ssize;
		669	}
		670
		671	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		672	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		673
		674	return cctx;
		675	}
		676
		677	static void
		678	cctx_destroy (coro_cctx *cctx)
		679	{
		680	if (!cctx)
		681	return;
		682
		683	--cctx_count;
		684
		685	#if CORO_USE_VALGRIND
		686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		687	#endif
		688
		689	#if HAVE_MMAP
		690	if (cctx->mapped)
		691	munmap (cctx->sptr, cctx->ssize);
		692	else
		693	#endif
		694	Safefree (cctx->sptr);
		695
		696	Safefree (cctx);
		697	}
		698
		699	static coro_cctx *
		700	cctx_get (pTHX)
		701	{
		702	while (cctx_first)
		703	{
		704	coro_cctx *cctx = cctx_first;
		705	cctx_first = cctx->next;
		706	--cctx_idle;
		707
		708	if (cctx->ssize >= coro_stacksize)
		709	return cctx;
		710
		711	cctx_destroy (cctx);
		712	}
		713
701	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
702	CALLRUNOPS(aTHX);	715	return cctx_new ();
703
704	abort ();
705	}	716	}
706		717
707	STATIC void	718	static void
		719	cctx_put (coro_cctx *cctx)
		720	{
		721	/* free another cctx if overlimit */
		722	if (cctx_idle >= MAX_IDLE_CCTX)
		723	{
		724	coro_cctx *first = cctx_first;
		725	cctx_first = first->next;
		726	--cctx_idle;
		727
		728	assert (!first->inuse);
		729	cctx_destroy (first);
		730	}
		731
		732	++cctx_idle;
		733	cctx->next = cctx_first;
		734	cctx_first = cctx;
		735	}
		736
		737	/** coroutine switching *****************************************************/
		738
		739	/* never call directly, always through the coro_state_transfer global variable */
		740	static void NOINLINE
708	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	741	transfer (pTHX_ struct coro *prev, struct coro *next)
709	{	742	{
710	dSTACKLEVEL;	743	dSTACKLEVEL;
711		744
		745	/* sometimes transfer is only called to set idle_sp */
		746	if (!next)
		747	{
		748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		749	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		750	}
712	if (prev != next)	751	else if (prev != next)
713	{	752	{
714	if (next->mainstack)	753	coro_cctx *prev__cctx;
		754
		755	if (prev->flags & CF_NEW)
715	{	756	{
716	LOCK;	757	/* create a new empty context */
717	SAVE (prev, flags);	758	Newz (0, prev->cctx, 1, coro_cctx);
718	LOAD (next);	759	prev->cctx->inuse = 1;
719	UNLOCK;	760	prev->flags &= ~CF_NEW;
720		761	prev->flags |= CF_RUNNING;
721	/* mark this state as in-use */
722	next->mainstack = 0;
723	next->tmps_ix = -2;
724
725	/* stacklevel changed? if yes, grab the stack for us! */
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730	else if (prev->cursp != stacklevel
731	&& prev->stack->usecnt > 1)
732	{
733	prev->gencnt = ++prev->stack->gencnt;
734	prev->stack->usecnt = 1;
735	}
736
737	/* has our stack been invalidated? */
738	if (next->stack && next->stack->gencnt != next->gencnt)
739	{
740	deallocate_stack (next);
741	allocate_stack (next, 1);
742	coro_create (&(next->stack->cctx),
743	continue_coro, (void *)next,
744	next->stack->sptr, labs (next->stack->ssize));
745	}
746
747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748	prev->cursp = stacklevel;
749	/* don't add any code here */
750	}
751	else
752	next->cursp = stacklevel;
753	}	762	}
754	else if (next->tmps_ix == -2)	763
755	croak ("tried to transfer to running coroutine");	764	/*TODO: must not croak here */
		765	if (!prev->flags & CF_RUNNING)
		766	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		767
		768	if (next->flags & CF_RUNNING)
		769	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		770
		771	if (next->flags & CF_DESTROYED)
		772	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		773
		774	prev->flags &= ~CF_RUNNING;
		775	next->flags |= CF_RUNNING;
		776
		777	LOCK;
		778
		779	if (next->flags & CF_NEW)
		780	{
		781	/* need to start coroutine */
		782	next->flags &= ~CF_NEW;
		783	/* first get rid of the old state */
		784	save_perl (aTHX_ prev);
		785	/* setup coroutine call */
		786	setup_coro (aTHX_ next);
		787	/* need a new stack */
		788	assert (!next->cctx);
		789	}
756	else	790	else
757	{	791	{
758	LOCK;	792	/* coroutine already started */
759	SAVE (prev, -1); /* first get rid of the old state */	793	save_perl (aTHX_ prev);
760	UNLOCK;	794	load_perl (aTHX_ next);
761
762	if (flags & TRANSFER_SAVE_CCTXT)
763	{
764	if (!prev->stack)
765	allocate_stack (prev, 0);
766
767	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
768	{
769	PL_top_env = &next->start_env;
770
771	setup_coro (next);
772	next->cursp = stacklevel;
773
774	prev->stack->refcnt++;
775	prev->stack->usecnt++;
776	next->stack = prev->stack;
777	next->gencnt = prev->gencnt;
778	}
779	else
780	{
781	assert (!next->stack);
782	allocate_stack (next, 1);
783	coro_create (&(next->stack->cctx),
784	setup_coro, (void *)next,
785	next->stack->sptr, labs (next->stack->ssize));
786	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
787	prev->cursp = stacklevel;
788	/* don't add any code here */
789	}
790	}
791	else
792	{
793	setup_coro (next);
794	next->cursp = stacklevel;
795	}
796	}	795	}
797	}
798		796
799	LOCK;	797	prev__cctx = prev->cctx;
800	if (coro_mortal)	798
801	{	799	/* possibly "free" the cctx */
802	SvREFCNT_dec (coro_mortal);	800	if (prev__cctx->idle_sp == STACKLEVEL)
803	coro_mortal = 0;	801	{
804	}	802	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		803	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		804
		805	prev->cctx = 0;
		806
		807	cctx_put (prev__cctx);
		808	prev__cctx->inuse = 0;
		809	}
		810
		811	if (!next->cctx)
		812	{
		813	next->cctx = cctx_get (aTHX);
		814	assert (!next->cctx->inuse);
		815	next->cctx->inuse = 1;
		816	}
		817
		818	if (prev__cctx != next->cctx)
		819	{
		820	prev__cctx->top_env = PL_top_env;
		821	PL_top_env = next->cctx->top_env;
		822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		823	}
		824
		825	free_coro_mortal (aTHX);
805	UNLOCK;	826	UNLOCK;
		827	}
806	}	828	}
807		829
808	#define SV_CORO(sv,func) \	830	struct transfer_args
809	do { \	831	{
810	if (SvROK (sv)) \	832	struct coro *prev, *next;
811	sv = SvRV (sv); \	833	};
812	\
813	if (SvTYPE (sv) == SVt_PVHV) \
814	{ \
815	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
816	\
817	if (!he) \
818	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
819	\
820	(sv) = SvRV (HeVAL(he)); \
821	} \
822	\
823	/* must also be changed inside Coro::Cont::yield */ \
824	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
825	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
826	\
827	} while(0)
828		834
829	#define SvSTATE(sv) (struct coro *)SvIV (sv)	835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
830		836
		837	/** high level stuff ********************************************************/
		838
831	static void	839	static int
		840	coro_state_destroy (pTHX_ struct coro *coro)
		841	{
		842	if (coro->flags & CF_DESTROYED)
		843	return 0;
		844
		845	coro->flags |= CF_DESTROYED;
		846
		847	if (coro->flags & CF_READY)
		848	{
		849	/* reduce nready, as destroying a ready coro effectively unreadies it */
		850	/* alternative: look through all ready queues and remove the coro */
		851	LOCK;
		852	--coro_nready;
		853	UNLOCK;
		854	}
		855	else
		856	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		857
		858	if (coro->mainstack && coro->mainstack != main_mainstack)
		859	{
		860	struct coro temp;
		861
		862	assert (!(coro->flags & CF_RUNNING));
		863
		864	Zero (&temp, 1, struct coro);
		865	temp.save = CORO_SAVE_ALL;
		866
		867	if (coro->flags & CF_RUNNING)
		868	croak ("FATAL: tried to destroy currently running coroutine");
		869
		870	save_perl (aTHX_ &temp);
		871	load_perl (aTHX_ coro);
		872
		873	coro_destroy_stacks (aTHX);
		874
		875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		876
		877	coro->mainstack = 0;
		878	}
		879
		880	cctx_destroy (coro->cctx);
		881	SvREFCNT_dec (coro->args);
		882
		883	return 1;
		884	}
		885
		886	static int
		887	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		888	{
		889	struct coro *coro = (struct coro *)mg->mg_ptr;
		890	mg->mg_ptr = 0;
		891
		892	if (--coro->refcnt < 0)
		893	{
		894	coro_state_destroy (aTHX_ coro);
		895	Safefree (coro);
		896	}
		897
		898	return 0;
		899	}
		900
		901	static int
		902	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		903	{
		904	struct coro *coro = (struct coro *)mg->mg_ptr;
		905
		906	++coro->refcnt;
		907
		908	return 0;
		909	}
		910
		911	static MGVTBL coro_state_vtbl = {
		912	0, 0, 0, 0,
		913	coro_state_free,
		914	0,
		915	#ifdef MGf_DUP
		916	coro_state_dup,
		917	#else
		918	# define MGf_DUP 0
		919	#endif
		920	};
		921
		922	static struct coro *
		923	SvSTATE_ (pTHX_ SV *coro)
		924	{
		925	HV *stash;
		926	MAGIC *mg;
		927
		928	if (SvROK (coro))
		929	coro = SvRV (coro);
		930
		931	stash = SvSTASH (coro);
		932	if (stash != coro_stash && stash != coro_state_stash)
		933	{
		934	/* very slow, but rare, check */
		935	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		936	croak ("Coro::State object required");
		937	}
		938
		939	mg = CORO_MAGIC (coro);
		940	return (struct coro *)mg->mg_ptr;
		941	}
		942
		943	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		944
		945	static void
		946	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		947	{
		948	ta->prev = SvSTATE (prev_sv);
		949	ta->next = SvSTATE (next_sv);
		950	}
		951
		952	static void
832	api_transfer(pTHX_ SV *prev, SV *next, int flags)	953	api_transfer (SV *prev_sv, SV *next_sv)
833	{	954	{
834	SV_CORO (prev, "Coro::transfer");	955	dTHX;
835	SV_CORO (next, "Coro::transfer");	956	struct transfer_args ta;
836		957
837	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		959	TRANSFER (ta);
		960	}
		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	dTHX;
		966	struct coro *coro = SvSTATE (coro_sv);
		967	int old_save = coro->save;
		968
		969	if (new_save >= 0)
		970	coro->save = new_save;
		971
		972	return old_save;
838	}	973	}
839		974
840	/** Coro ********************************************************************/	975	/** Coro ********************************************************************/
841		976
842	#define PRIO_MAX 3
843	#define PRIO_HIGH 1
844	#define PRIO_NORMAL 0
845	#define PRIO_LOW -1
846	#define PRIO_IDLE -3
847	#define PRIO_MIN -4
848
849	/* for Coro.pm */
850	static GV *coro_current, *coro_idle;
851	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
852	static int coro_nready;
853
854	static void	977	static void
855	coro_enq (pTHX_ SV *sv)	978	coro_enq (pTHX_ SV *coro_sv)
856	{	979	{
857	if (SvTYPE (sv) == SVt_PVHV)
858	{
859	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
860	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
861
862	prio = prio > PRIO_MAX ? PRIO_MAX
863	: prio < PRIO_MIN ? PRIO_MIN
864	: prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);	980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;
868
869	return;
870	}
871
872	croak ("Coro::ready tried to enqueue something that is not a coroutine");
873	}	981	}
874		982
875	static SV *	983	static SV *
876	coro_deq (pTHX_ int min_prio)	984	coro_deq (pTHX_ int min_prio)
877	{	985	{
…		…
880	min_prio -= PRIO_MIN;	988	min_prio -= PRIO_MIN;
881	if (min_prio < 0)	989	if (min_prio < 0)
882	min_prio = 0;	990	min_prio = 0;
883		991
884	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
885	if (av_len (coro_ready[prio]) >= 0)	993	if (AvFILLp (coro_ready [prio]) >= 0)
886	{
887	coro_nready--;
888	return av_shift (coro_ready[prio]);	994	return av_shift (coro_ready [prio]);
889	}
890		995
891	return 0;	996	return 0;
892	}	997	}
893		998
894	static void	999	static int
895	api_ready (SV *coro)	1000	api_ready (SV *coro_sv)
896	{	1001	{
897	dTHX;	1002	dTHX;
		1003	struct coro *coro;
898		1004
899	if (SvROK (coro))	1005	if (SvROK (coro_sv))
900	coro = SvRV (coro);	1006	coro_sv = SvRV (coro_sv);
		1007
		1008	coro = SvSTATE (coro_sv);
		1009
		1010	if (coro->flags & CF_READY)
		1011	return 0;
		1012
		1013	coro->flags |= CF_READY;
901		1014
902	LOCK;	1015	LOCK;
903	coro_enq (aTHX_ SvREFCNT_inc (coro));	1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1017	++coro_nready;
904	UNLOCK;	1018	UNLOCK;
		1019
		1020	return 1;
		1021	}
		1022
		1023	static int
		1024	api_is_ready (SV *coro_sv)
		1025	{
		1026	dTHX;
		1027	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1028	}
		1029
		1030	static void
		1031	prepare_schedule (pTHX_ struct transfer_args *ta)
		1032	{
		1033	SV *prev_sv, *next_sv;
		1034
		1035	for (;;)
		1036	{
		1037	LOCK;
		1038	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1039
		1040	/* nothing to schedule: call the idle handler */
		1041	if (!next_sv)
		1042	{
		1043	dSP;
		1044	UNLOCK;
		1045
		1046	ENTER;
		1047	SAVETMPS;
		1048
		1049	PUSHMARK (SP);
		1050	PUTBACK;
		1051	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1052
		1053	FREETMPS;
		1054	LEAVE;
		1055	continue;
		1056	}
		1057
		1058	ta->next = SvSTATE (next_sv);
		1059
		1060	/* cannot transfer to destroyed coros, skip and look for next */
		1061	if (ta->next->flags & CF_DESTROYED)
		1062	{
		1063	UNLOCK;
		1064	SvREFCNT_dec (next_sv);
		1065	/* coro_nready is already taken care of by destroy */
		1066	continue;
		1067	}
		1068
		1069	--coro_nready;
		1070	UNLOCK;
		1071	break;
		1072	}
		1073
		1074	/* free this only after the transfer */
		1075	prev_sv = SvRV (coro_current);
		1076	SvRV_set (coro_current, next_sv);
		1077	ta->prev = SvSTATE (prev_sv);
		1078
		1079	assert (ta->next->flags & CF_READY);
		1080	ta->next->flags &= ~CF_READY;
		1081
		1082	LOCK;
		1083	free_coro_mortal (aTHX);
		1084	coro_mortal = prev_sv;
		1085	UNLOCK;
		1086	}
		1087
		1088	static void
		1089	prepare_cede (pTHX_ struct transfer_args *ta)
		1090	{
		1091	api_ready (coro_current);
		1092	prepare_schedule (aTHX_ ta);
		1093	}
		1094
		1095	static int
		1096	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1097	{
		1098	if (coro_nready)
		1099	{
		1100	SV *prev = SvRV (coro_current);
		1101	prepare_schedule (aTHX_ ta);
		1102	api_ready (prev);
		1103	return 1;
		1104	}
		1105	else
		1106	return 0;
905	}	1107	}
906		1108
907	static void	1109	static void
908	api_schedule (void)	1110	api_schedule (void)
909	{	1111	{
910	dTHX;	1112	dTHX;
		1113	struct transfer_args ta;
911		1114
912	SV *prev, *next;	1115	prepare_schedule (aTHX_ &ta);
913		1116	TRANSFER (ta);
914	LOCK;
915
916	prev = SvRV (GvSV (coro_current));
917	next = coro_deq (aTHX_ PRIO_MIN);
918
919	if (!next)
920	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
921
922	/* free this only after the transfer */
923	coro_mortal = prev;
924	SV_CORO (prev, "Coro::schedule");
925
926	SvRV (GvSV (coro_current)) = next;
927
928	SV_CORO (next, "Coro::schedule");
929
930	UNLOCK;
931
932	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
933	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
934	}	1117	}
935		1118
936	static void	1119	static int
937	api_cede (void)	1120	api_cede (void)
938	{	1121	{
939	dTHX;	1122	dTHX;
		1123	struct transfer_args ta;
940		1124
941	LOCK;	1125	prepare_cede (aTHX_ &ta);
942	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
943	UNLOCK;
944		1126
945	api_schedule ();	1127	if (ta.prev != ta.next)
		1128	{
		1129	TRANSFER (ta);
		1130	return 1;
		1131	}
		1132	else
		1133	return 0;
		1134	}
		1135
		1136	static int
		1137	api_cede_notself (void)
		1138	{
		1139	dTHX;
		1140	struct transfer_args ta;
		1141
		1142	if (prepare_cede_notself (aTHX_ &ta))
		1143	{
		1144	TRANSFER (ta);
		1145	return 1;
		1146	}
		1147	else
		1148	return 0;
946	}	1149	}
947		1150
948	MODULE = Coro::State PACKAGE = Coro::State	1151	MODULE = Coro::State PACKAGE = Coro::State
949		1152
950	PROTOTYPES: ENABLE	1153	PROTOTYPES: DISABLE
951		1154
952	BOOT:	1155	BOOT:
953	{ /* {} necessary for stoopid perl-5.6.x */	1156	{
954	#ifdef USE_ITHREADS	1157	#ifdef USE_ITHREADS
955	MUTEX_INIT (&coro_mutex);	1158	MUTEX_INIT (&coro_mutex);
956	#endif	1159	#endif
		1160	BOOT_PAGESIZE;
957		1161
958	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
959	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
960	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961		1163
962	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
963	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1165	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
964	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1166	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1167	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
965	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1168	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
966		1169
967	main_mainstack = PL_mainstack;	1170	main_mainstack = PL_mainstack;
968		1171
969	coroapi.ver = CORO_API_VERSION;	1172	coroapi.ver = CORO_API_VERSION;
970	coroapi.transfer = api_transfer;	1173	coroapi.transfer = api_transfer;
971	}
972		1174
973	Coro::State	1175	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
974	_newprocess(args)	1176	}
975	SV * args	1177
976	PROTOTYPE: $	1178	SV *
		1179	new (char *klass, ...)
977	CODE:	1180	CODE:
978	Coro__State coro;	1181	{
		1182	struct coro *coro;
		1183	HV *hv;
		1184	int i;
979		1185
980	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
981	croak ("Coro::State::_newprocess expects an arrayref");
982
983	Newz (0, coro, 1, struct coro);	1186	Newz (0, coro, 1, struct coro);
		1187	coro->args = newAV ();
		1188	coro->save = CORO_SAVE_ALL;
		1189	coro->flags = CF_NEW;
984		1190
985	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1191	hv = newHV ();
986	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1192	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
987	/*coro->stack = 0;*/	1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
988		1194
989	/* same as JMPENV_BOOTSTRAP */	1195	for (i = 1; i < items; i++)
990	/* we might be able to recycle start_env, but safe is safe */	1196	av_push (coro->args, newSVsv (ST (i)));
991	/*Zero(&coro->start_env, 1, JMPENV);*/	1197	}
992	coro->start_env.je_ret = -1;
993	coro->start_env.je_mustcatch = TRUE;
994
995	RETVAL = coro;
996	OUTPUT:	1198	OUTPUT:
997	RETVAL	1199	RETVAL
998		1200
		1201	int
		1202	save (SV *coro, int new_save = -1)
		1203	CODE:
		1204	RETVAL = api_save (coro, new_save);
		1205	OUTPUT:
		1206	RETVAL
		1207
999	void	1208	void
1000	transfer(prev, next, flags)	1209	_set_stacklevel (...)
1001	SV *prev	1210	ALIAS:
1002	SV *next	1211	Coro::State::transfer = 1
1003	int flags	1212	Coro::schedule = 2
1004	PROTOTYPE: @	1213	Coro::cede = 3
		1214	Coro::cede_notself = 4
1005	CODE:	1215	CODE:
1006	PUTBACK;	1216	{
1007	SV_CORO (next, "Coro::transfer");	1217	struct transfer_args ta;
1008	SV_CORO (prev, "Coro::transfer");	1218
1009	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1219	switch (ix)
1010	SPAGAIN;	1220	{
		1221	case 0:
		1222	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1223	ta.next = 0;
		1224	break;
		1225
		1226	case 1:
		1227	if (items != 2)
		1228	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1229
		1230	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1231	break;
		1232
		1233	case 2:
		1234	prepare_schedule (aTHX_ &ta);
		1235	break;
		1236
		1237	case 3:
		1238	prepare_cede (aTHX_ &ta);
		1239	break;
		1240
		1241	case 4:
		1242	if (!prepare_cede_notself (aTHX_ &ta))
		1243	XSRETURN_EMPTY;
		1244
		1245	break;
		1246	}
		1247
		1248	BARRIER;
		1249	TRANSFER (ta);
		1250
		1251	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1252	XSRETURN_YES;
		1253	}
		1254
		1255	bool
		1256	_destroy (SV *coro_sv)
		1257	CODE:
		1258	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1259	OUTPUT:
		1260	RETVAL
1011		1261
1012	void	1262	void
1013	DESTROY(coro)
1014	Coro::State coro
1015	CODE:
1016
1017	if (coro->mainstack && coro->mainstack != main_mainstack)
1018	{
1019	struct coro temp;
1020
1021	PUTBACK;
1022	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1023	LOAD (aTHX_ coro);
1024	SPAGAIN;
1025
1026	destroy_stacks (aTHX);
1027
1028	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1029	SPAGAIN;
1030
1031	coro->mainstack = 0;
1032	}
1033
1034	deallocate_stack (coro);
1035	SvREFCNT_dec (coro->args);
1036	Safefree (coro);
1037
1038	void
1039	_exit(code)	1263	_exit (code)
1040	int code	1264	int code
1041	PROTOTYPE: $	1265	PROTOTYPE: $
1042	CODE:	1266	CODE:
1043	_exit (code);	1267	_exit (code);
1044		1268
1045	MODULE = Coro::State PACKAGE = Coro::Cont	1269	int
		1270	cctx_stacksize (int new_stacksize = 0)
		1271	CODE:
		1272	RETVAL = coro_stacksize;
		1273	if (new_stacksize)
		1274	coro_stacksize = new_stacksize;
		1275	OUTPUT:
		1276	RETVAL
1046		1277
1047	# this is slightly dirty (should expose a c-level api)	1278	int
		1279	cctx_count ()
		1280	CODE:
		1281	RETVAL = cctx_count;
		1282	OUTPUT:
		1283	RETVAL
1048		1284
1049	void	1285	int
1050	yield(...)	1286	cctx_idle ()
1051	PROTOTYPE: @	1287	CODE:
1052	CODE:	1288	RETVAL = cctx_idle;
1053	static SV *returnstk;	1289	OUTPUT:
1054	SV *sv;	1290	RETVAL
1055	AV *defav = GvAV (PL_defgv);
1056	struct coro *prev, *next;
1057
1058	if (!returnstk)
1059	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1060
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1068	sv = av_pop ((AV *)SvRV (returnstk));
1069	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1070	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1071	SvREFCNT_dec (sv);
1072
1073	transfer (aTHX_ prev, next, 0);
1074		1291
1075	MODULE = Coro::State PACKAGE = Coro	1292	MODULE = Coro::State PACKAGE = Coro
1076		1293
1077	# this is slightly dirty (should expose a c-level api)
1078
1079	BOOT:	1294	BOOT:
1080	{	1295	{
1081	int i;	1296	int i;
		1297
1082	HV *stash = gv_stashpv ("Coro", TRUE);	1298	coro_stash = gv_stashpv ("Coro", TRUE);
1083		1299
1084	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1300	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1301	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1302	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1303	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1304	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1305	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090		1306
1091	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1307	coro_current = get_sv ("Coro::current", FALSE);
1092	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1308	SvREADONLY_on (coro_current);
1093		1309
1094	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1310	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1095	coro_ready[i] = newAV ();	1311	coro_ready[i] = newAV ();
1096		1312
1097	{	1313	{
1098	SV *sv = perl_get_sv("Coro::API", 1);	1314	SV *sv = perl_get_sv("Coro::API", 1);
1099		1315
1100	coroapi.schedule = api_schedule;	1316	coroapi.schedule = api_schedule;
		1317	coroapi.save = api_save;
1101	coroapi.cede = api_cede;	1318	coroapi.cede = api_cede;
		1319	coroapi.cede_notself = api_cede_notself;
1102	coroapi.ready = api_ready;	1320	coroapi.ready = api_ready;
		1321	coroapi.is_ready = api_is_ready;
1103	coroapi.nready = &coro_nready;	1322	coroapi.nready = &coro_nready;
1104	coroapi.current = coro_current;	1323	coroapi.current = coro_current;
1105		1324
1106	GCoroAPI = &coroapi;	1325	GCoroAPI = &coroapi;
1107	sv_setiv(sv, (IV)&coroapi);	1326	sv_setiv (sv, (IV)&coroapi);
1108	SvREADONLY_on(sv);	1327	SvREADONLY_on (sv);
1109	}	1328	}
1110	}	1329	}
1111		1330
1112	#if !PERL_MICRO
1113
1114	void	1331	void
1115	ready(self)	1332	_set_current (SV *current)
1116	SV * self
1117	PROTOTYPE: $	1333	PROTOTYPE: $
1118	CODE:	1334	CODE:
1119	api_ready (self);	1335	SvREFCNT_dec (SvRV (coro_current));
1120		1336	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1121	#endif
1122		1337
1123	int	1338	int
		1339	prio (Coro::State coro, int newprio = 0)
		1340	ALIAS:
		1341	nice = 1
		1342	CODE:
		1343	{
		1344	RETVAL = coro->prio;
		1345
		1346	if (items > 1)
		1347	{
		1348	if (ix)
		1349	newprio = coro->prio - newprio;
		1350
		1351	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1352	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1353
		1354	coro->prio = newprio;
		1355	}
		1356	}
		1357	OUTPUT:
		1358	RETVAL
		1359
		1360	SV *
		1361	ready (SV *self)
		1362	PROTOTYPE: $
		1363	CODE:
		1364	RETVAL = boolSV (api_ready (self));
		1365	OUTPUT:
		1366	RETVAL
		1367
		1368	SV *
		1369	is_ready (SV *self)
		1370	PROTOTYPE: $
		1371	CODE:
		1372	RETVAL = boolSV (api_is_ready (self));
		1373	OUTPUT:
		1374	RETVAL
		1375
		1376	int
1124	nready(...)	1377	nready (...)
1125	PROTOTYPE:	1378	PROTOTYPE:
1126	CODE:	1379	CODE:
1127	RETVAL = coro_nready;	1380	RETVAL = coro_nready;
1128	OUTPUT:	1381	OUTPUT:
1129	RETVAL	1382	RETVAL
1130		1383
		1384	MODULE = Coro::State PACKAGE = Coro::AIO
		1385
		1386	SV *
		1387	_get_state ()
		1388	CODE:
		1389	{
		1390	struct io_state *data;
		1391
		1392	RETVAL = newSV (sizeof (struct io_state));
		1393	data = (struct io_state *)SvPVX (RETVAL);
		1394	SvCUR_set (RETVAL, sizeof (struct io_state));
		1395	SvPOK_only (RETVAL);
		1396
		1397	data->errorno = errno;
		1398	data->laststype = PL_laststype;
		1399	data->laststatval = PL_laststatval;
		1400	data->statcache = PL_statcache;
		1401	}
		1402	OUTPUT:
		1403	RETVAL
		1404
1131	void	1405	void
1132	schedule(...)	1406	_set_state (char *data_)
1133	PROTOTYPE:	1407	PROTOTYPE: $
1134	CODE:	1408	CODE:
1135	api_schedule ();	1409	{
		1410	struct io_state *data = (void *)data_;
1136		1411
1137	void	1412	errno = data->errorno;
1138	cede(...)	1413	PL_laststype = data->laststype;
1139	PROTOTYPE:	1414	PL_laststatval = data->laststatval;
1140	CODE:	1415	PL_statcache = data->statcache;
1141	api_cede ();	1416	}
1142		1417

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