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Comparing Coro/Coro/State.xs (file contents):
Revision 1.76 by root, Thu Oct 26 08:45:56 2006 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
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 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)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
33		76	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	77	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	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;
…		…
64	#else	117	#else
65	# define LOCK (void)0	118	# define LOCK (void)0
66	# define UNLOCK (void)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	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136		171
137	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
138	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;
139	};	191	};
140		192
141	typedef struct coro *Coro__State;	193	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	194	typedef struct coro *Coro__State_or_hashref;
143		195
144	/* mostly copied from op.c:cv_clone2 */	196	/** Coro ********************************************************************/
145	STATIC AV *	197
146	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)
147	{	214	{
148	AV *av;	215	AV *padlist = CvPADLIST (cv);
149	I32 ix;
150	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
151	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
152	SV **pname = AvARRAY (protopad_name);
153	SV **ppad = AvARRAY (protopad);
154	I32 fname = AvFILLp (protopad_name);
155	I32 fpad = AvFILLp (protopad);
156	AV *newpadlist, *newpad_name, *newpad;	216	AV *newpadlist, *newpad;
157	SV **npad;
158
159	newpad_name = newAV ();
160	for (ix = fname; ix >= 0; ix--)
161	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163	newpad = newAV ();
164	av_fill (newpad, AvFILLp (protopad));
165	npad = AvARRAY (newpad);
166		217
167	newpadlist = newAV ();	218	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	219	AvREAL_off (newpadlist);
169	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)));
170	av_store (newpadlist, 1, (SV *) newpad);	229	av_store (newpadlist, 1, (SV *)newpad);
171
172	av = newAV (); /* will be @_ */
173	av_extend (av, 0);
174	av_store (newpad, 0, (SV *) av);
175	AvREIFY_on (av);
176
177	for (ix = fpad; ix > 0; ix--)
178	{
179	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
180
181	if (namesv && namesv != &PL_sv_undef)
182	{
183	char *name = SvPVX (namesv); /* XXX */
184
185	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
186	{ /* lexical from outside? */
187	npad[ix] = SvREFCNT_inc (ppad[ix]);
188	}
189	else
190	{ /* our own lexical */
191	SV *sv;
192	if (*name == '&')
193	sv = SvREFCNT_inc (ppad[ix]);
194	else if (*name == '@')
195	sv = (SV *) newAV ();
196	else if (*name == '%')
197	sv = (SV *) newHV ();
198	else
199	sv = NEWSV (0, 0);
200
201	#ifdef SvPADBUSY
202	if (!SvPADBUSY (sv))
203	#endif
204	SvPADMY_on (sv);
205
206	npad[ix] = sv;
207	}
208	}
209	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210	{
211	npad[ix] = SvREFCNT_inc (ppad[ix]);
212	}
213	else
214	{
215	SV *sv = NEWSV (0, 0);
216	SvPADTMP_on (sv);
217	npad[ix] = sv;
218	}
219	}
220
221	#if 0 /* return -ENOTUNDERSTOOD */
222	/* Now that vars are all in place, clone nested closures. */
223
224	for (ix = fpad; ix > 0; ix--) {
225	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226	if (namesv
227	&& namesv != &PL_sv_undef
228	&& !(SvFLAGS(namesv) & SVf_FAKE)
229	&& *SvPVX(namesv) == '&'
230	&& CvCLONE(ppad[ix]))
231	{
232	CV *kid = cv_clone((CV*)ppad[ix]);
233	SvREFCNT_dec(ppad[ix]);
234	CvCLONE_on(kid);
235	SvPADMY_on(kid);
236	npad[ix] = (SV*)kid;
237	}
238	}
239	#endif
240		230
241	return newpadlist;	231	return newpadlist;
242	}	232	}
243		233
244	STATIC void	234	static void
245	free_padlist (pTHX_ AV *padlist)	235	free_padlist (pTHX_ AV *padlist)
246	{	236	{
247	/* may be during global destruction */	237	/* may be during global destruction */
248	if (SvREFCNT (padlist))	238	if (SvREFCNT (padlist))
249	{	239	{
…		…
263		253
264	SvREFCNT_dec ((SV*)padlist);	254	SvREFCNT_dec ((SV*)padlist);
265	}	255	}
266	}	256	}
267		257
268	STATIC int	258	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	259	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	260	{
271	AV *padlist;	261	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	262	AV *av = (AV *)mg->mg_obj;
273		263
…		…
282		272
283	#define PERL_MAGIC_coro PERL_MAGIC_ext	273	#define PERL_MAGIC_coro PERL_MAGIC_ext
284		274
285	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	275	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
286		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
287	/* the next two functions merely cache the padlists */	284	/* the next two functions merely cache the padlists */
288	STATIC void	285	static void
289	get_padlist (pTHX_ CV *cv)	286	get_padlist (pTHX_ CV *cv)
290	{	287	{
291	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
292		290
293	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
294	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
295	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
296	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	302	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		303	#endif
		304	}
297	}	305	}
298		306
299	STATIC void	307	static void
300	put_padlist (pTHX_ CV *cv)	308	put_padlist (pTHX_ CV *cv)
301	{	309	{
302	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	310	MAGIC *mg = CORO_MAGIC (cv);
		311	AV *av;
303		312
304	if (!mg)	313	if (!mg)
305	{	314	{
306	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	315	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
307	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
308	mg->mg_virtual = &vtbl_coro;	317	mg->mg_virtual = &vtbl_coro;
309	mg->mg_obj = (SV *)newAV ();	318	mg->mg_obj = (SV *)newAV ();
310	}	319	}
311		320
312	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);
313	}	327	}
		328
		329	/** load & save, init *******************************************************/
314		330
315	#define SB do {	331	#define SB do {
316	#define SE } while (0)	332	#define SE } while (0)
317		333
318	#define LOAD(state) load_state(aTHX_ (state));
319	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
320
321	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	334	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
322		335
323	static void	336	static void
324	load_state(pTHX_ Coro__State c)	337	load_perl (pTHX_ Coro__State c)
325	{	338	{
326	PL_dowarn = c->dowarn;	339	#define VAR(name,type) PL_ ## name = c->name;
327	PL_in_eval = c->in_eval;	340	# include "state.h"
328		341	#undef VAR
329	PL_curstackinfo = c->curstackinfo;
330	PL_curstack = c->curstack;
331	PL_mainstack = c->mainstack;
332	PL_stack_sp = c->stack_sp;
333	PL_op = c->op;
334	PL_curpad = c->curpad;
335	PL_comppad = c->comppad;
336	PL_compcv = c->compcv;
337	PL_stack_base = c->stack_base;
338	PL_stack_max = c->stack_max;
339	PL_tmps_stack = c->tmps_stack;
340	PL_tmps_floor = c->tmps_floor;
341	PL_tmps_ix = c->tmps_ix;
342	PL_tmps_max = c->tmps_max;
343	PL_markstack = c->markstack;
344	PL_markstack_ptr = c->markstack_ptr;
345	PL_markstack_max = c->markstack_max;
346	PL_scopestack = c->scopestack;
347	PL_scopestack_ix = c->scopestack_ix;
348	PL_scopestack_max = c->scopestack_max;
349	PL_savestack = c->savestack;
350	PL_savestack_ix = c->savestack_ix;
351	PL_savestack_max = c->savestack_max;
352	#if PERL_VERSION < 9
353	PL_retstack = c->retstack;
354	PL_retstack_ix = c->retstack_ix;
355	PL_retstack_max = c->retstack_max;
356	#endif
357	PL_curpm = c->curpm;
358	PL_curcop = c->curcop;
359	PL_top_env = c->top_env;
360		342
361	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	343	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
362	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	344	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
363	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	}
364		357
365	{	358	{
366	dSP;	359	dSP;
367	CV *cv;	360	CV *cv;
368		361
369	/* now do the ugly restore mess */	362	/* now do the ugly restore mess */
370	while ((cv = (CV *)POPs))	363	while ((cv = (CV *)POPs))
371	{	364	{
372	AV *padlist = (AV *)POPs;
373
374	if (padlist)
375	{
376	put_padlist (aTHX_ cv); /* mark this padlist as available */	365	put_padlist (aTHX_ cv); /* mark this padlist as available */
377	CvPADLIST(cv) = padlist;	366	CvDEPTH (cv) = PTR2IV (POPs);
378	}	367	CvPADLIST (cv) = (AV *)POPs;
379
380	++CvDEPTH(cv);
381	}	368	}
382		369
383	PUTBACK;	370	PUTBACK;
384	}	371	}
		372	assert (!PL_comppad || AvARRAY (PL_comppad));//D
385	}	373	}
386		374
387	static void	375	static void
388	save_state(pTHX_ Coro__State c, int flags)	376	save_perl (pTHX_ Coro__State c)
389	{	377	{
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
390	{	379	{
391	dSP;	380	dSP;
392	I32 cxix = cxstack_ix;	381	I32 cxix = cxstack_ix;
393	PERL_CONTEXT *ccstk = cxstack;	382	PERL_CONTEXT *ccstk = cxstack;
394	PERL_SI *top_si = PL_curstackinfo;	383	PERL_SI *top_si = PL_curstackinfo;
…		…
396	/*	385	/*
397	* 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
398	* (and reinitialize) all cv's in the whole callchain :(	387	* (and reinitialize) all cv's in the whole callchain :(
399	*/	388	*/
400		389
		390	EXTEND (SP, 3 + 1);
401	PUSHs (Nullsv);	391	PUSHs (Nullsv);
402	/* this loop was inspired by pp_caller */	392	/* this loop was inspired by pp_caller */
403	for (;;)	393	for (;;)
404	{	394	{
405	while (cxix >= 0)	395	while (cxix >= 0)
406	{	396	{
407	PERL_CONTEXT *cx = &ccstk[cxix--];	397	PERL_CONTEXT *cx = &ccstk[cxix--];
408		398
409	if (CxTYPE(cx) == CXt_SUB)	399	if (CxTYPE (cx) == CXt_SUB)
410	{	400	{
411	CV *cv = cx->blk_sub.cv;	401	CV *cv = cx->blk_sub.cv;
		402
412	if (CvDEPTH(cv))	403	if (CvDEPTH (cv))
413	{	404	{
414	EXTEND (SP, CvDEPTH(cv)*2);	405	EXTEND (SP, 3);
415
416	while (--CvDEPTH(cv))
417	{
418	/* this tells the restore code to increment CvDEPTH */
419	PUSHs (Nullsv);
420	PUSHs ((SV *)cv);
421	}
422
423	PUSHs ((SV *)CvPADLIST(cv));	406	PUSHs ((SV *)CvPADLIST (cv));
		407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
424	PUSHs ((SV *)cv);	408	PUSHs ((SV *)cv);
425		409
		410	CvDEPTH (cv) = 0;
426	get_padlist (aTHX_ cv); /* this is a monster */	411	get_padlist (aTHX_ cv);
427	}	412	}
428	}	413	}
429	#ifdef CXt_FORMAT
430	else if (CxTYPE(cx) == CXt_FORMAT)
431	{
432	/* I never used formats, so how should I know how these are implemented? */
433	/* my bold guess is as a simple, plain sub... */
434	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435	}
436	#endif
437	}	414	}
438		415
439	if (top_si->si_type == PERLSI_MAIN)	416	if (top_si->si_type == PERLSI_MAIN)
440	break;	417	break;
441		418
…		…
445	}	422	}
446		423
447	PUTBACK;	424	PUTBACK;
448	}	425	}
449		426
450	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;
451	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
452	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;
453		431
454	c->dowarn = PL_dowarn;	432	#define VAR(name,type)c->name = PL_ ## name;
455	c->in_eval = PL_in_eval;	433	# include "state.h"
456		434	#undef VAR
457	c->curstackinfo = PL_curstackinfo;
458	c->curstack = PL_curstack;
459	c->mainstack = PL_mainstack;
460	c->stack_sp = PL_stack_sp;
461	c->op = PL_op;
462	c->curpad = PL_curpad;
463	c->comppad = PL_comppad;
464	c->compcv = PL_compcv;
465	c->stack_base = PL_stack_base;
466	c->stack_max = PL_stack_max;
467	c->tmps_stack = PL_tmps_stack;
468	c->tmps_floor = PL_tmps_floor;
469	c->tmps_ix = PL_tmps_ix;
470	c->tmps_max = PL_tmps_max;
471	c->markstack = PL_markstack;
472	c->markstack_ptr = PL_markstack_ptr;
473	c->markstack_max = PL_markstack_max;
474	c->scopestack = PL_scopestack;
475	c->scopestack_ix = PL_scopestack_ix;
476	c->scopestack_max = PL_scopestack_max;
477	c->savestack = PL_savestack;
478	c->savestack_ix = PL_savestack_ix;
479	c->savestack_max = PL_savestack_max;
480	#if PERL_VERSION < 9
481	c->retstack = PL_retstack;
482	c->retstack_ix = PL_retstack_ix;
483	c->retstack_max = PL_retstack_max;
484	#endif
485	c->curpm = PL_curpm;
486	c->curcop = PL_curcop;
487	c->top_env = PL_top_env;
488	}	435	}
489		436
490	/*	437	/*
491	* allocate various perl stacks. This is an exact copy	438	* allocate various perl stacks. This is an exact copy
492	* of perl.c:init_stacks, except that it uses less memory	439	* of perl.c:init_stacks, except that it uses less memory
493	* on the (sometimes correct) assumption that coroutines do	440	* on the (sometimes correct) assumption that coroutines do
494	* not usually need a lot of stackspace.	441	* not usually need a lot of stackspace.
495	*/	442	*/
496	STATIC void	443	#if CORO_PREFER_PERL_FUNCTIONS
		444	# define coro_init_stacks init_stacks
		445	#else
		446	static void
497	coro_init_stacks (pTHX)	447	coro_init_stacks (pTHX)
498	{	448	{
499	LOCK;
500
501	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
502	PL_curstackinfo->si_type = PERLSI_MAIN;	450	PL_curstackinfo->si_type = PERLSI_MAIN;
503	PL_curstack = PL_curstackinfo->si_stack;	451	PL_curstack = PL_curstackinfo->si_stack;
504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505		453
506	PL_stack_base = AvARRAY(PL_curstack);	454	PL_stack_base = AvARRAY(PL_curstack);
507	PL_stack_sp = PL_stack_base;	455	PL_stack_sp = PL_stack_base;
508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
509		457
510	New(50,PL_tmps_stack,96,SV*);	458	New(50,PL_tmps_stack,128,SV*);
511	PL_tmps_floor = -1;	459	PL_tmps_floor = -1;
512	PL_tmps_ix = -1;	460	PL_tmps_ix = -1;
513	PL_tmps_max = 96;	461	PL_tmps_max = 128;
514		462
515	New(54,PL_markstack,16,I32);	463	New(54,PL_markstack,32,I32);
516	PL_markstack_ptr = PL_markstack;	464	PL_markstack_ptr = PL_markstack;
517	PL_markstack_max = PL_markstack + 16;	465	PL_markstack_max = PL_markstack + 32;
518		466
519	#ifdef SET_MARK_OFFSET	467	#ifdef SET_MARK_OFFSET
520	SET_MARK_OFFSET;	468	SET_MARK_OFFSET;
521	#endif	469	#endif
522		470
523	New(54,PL_scopestack,16,I32);	471	New(54,PL_scopestack,32,I32);
524	PL_scopestack_ix = 0;	472	PL_scopestack_ix = 0;
525	PL_scopestack_max = 16;	473	PL_scopestack_max = 32;
526		474
527	New(54,PL_savestack,96,ANY);	475	New(54,PL_savestack,64,ANY);
528	PL_savestack_ix = 0;	476	PL_savestack_ix = 0;
529	PL_savestack_max = 96;	477	PL_savestack_max = 64;
530		478
531	#if PERL_VERSION < 9	479	#if !PERL_VERSION_ATLEAST (5,9,0)
532	New(54,PL_retstack,8,OP*);	480	New(54,PL_retstack,16,OP*);
533	PL_retstack_ix = 0;	481	PL_retstack_ix = 0;
534	PL_retstack_max = 8;	482	PL_retstack_max = 16;
535	#endif	483	#endif
536
537	UNLOCK;
538	}	484	}
		485	#endif
539		486
540	/*	487	/*
541	* destroy the stacks, the callchain etc...	488	* destroy the stacks, the callchain etc...
542	*/	489	*/
543	STATIC void	490	static void
544	destroy_stacks(pTHX)	491	coro_destroy_stacks (pTHX)
545	{	492	{
546	if (!IN_DESTRUCT)	493	if (!IN_DESTRUCT)
547	{	494	{
548	/* is this ugly, I ask? */	495	/* restore all saved variables and stuff */
549	LEAVE_SCOPE (0);	496	LEAVE_SCOPE (0);
		497	assert (PL_tmps_floor == -1);
550		498
551	/* sure it is, but more important: is it correct?? :/ */	499	/* free all temporaries */
552	FREETMPS;	500	FREETMPS;
		501	assert (PL_tmps_ix == -1);
553		502
		503	/* unwind all extra stacks */
554	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	504	POPSTACK_TO (PL_mainstack);
		505
		506	/* unwind main stack */
		507	dounwind (-1);
555	}	508	}
556		509
557	while (PL_curstackinfo->si_next)	510	while (PL_curstackinfo->si_next)
558	PL_curstackinfo = PL_curstackinfo->si_next;	511	PL_curstackinfo = PL_curstackinfo->si_next;
559		512
560	while (PL_curstackinfo)	513	while (PL_curstackinfo)
561	{	514	{
562	PERL_SI *p = PL_curstackinfo->si_prev;	515	PERL_SI *p = PL_curstackinfo->si_prev;
563		516
564	{ /*D*//*remove*/
565	dSP;
566	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
567	PUTBACK; /* possibly superfluous */
568	}
569
570	if (!IN_DESTRUCT)	517	if (!IN_DESTRUCT)
571	{
572	dounwind (-1);/*D*//*remove*/
573	SvREFCNT_dec (PL_curstackinfo->si_stack);	518	SvREFCNT_dec (PL_curstackinfo->si_stack);
574	}
575		519
576	Safefree (PL_curstackinfo->si_cxstack);	520	Safefree (PL_curstackinfo->si_cxstack);
577	Safefree (PL_curstackinfo);	521	Safefree (PL_curstackinfo);
578	PL_curstackinfo = p;	522	PL_curstackinfo = p;
579	}	523	}
580		524
581	Safefree (PL_tmps_stack);	525	Safefree (PL_tmps_stack);
582	Safefree (PL_markstack);	526	Safefree (PL_markstack);
583	Safefree (PL_scopestack);	527	Safefree (PL_scopestack);
584	Safefree (PL_savestack);	528	Safefree (PL_savestack);
585	#if PERL_VERSION < 9	529	#if !PERL_VERSION_ATLEAST (5,9,0)
586	Safefree (PL_retstack);	530	Safefree (PL_retstack);
587	#endif	531	#endif
588	}	532	}
589		533
590	static void	534	/** coroutine stack handling ************************************************/
591	allocate_stack (Coro__State ctx, int alloc)
592	{
593	coro_stack *stack;
594		535
595	New (0, stack, 1, coro_stack);
596
597	stack->refcnt = 1;
598	stack->usecnt = 1;
599	stack->gencnt = ctx->gencnt = 0;
600
601	if (alloc)
602	{
603	#if HAVE_MMAP
604	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
605	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
606	if (stack->sptr == (void *)-1)
607	#endif
608	{
609	stack->ssize = - (STACKSIZE * (long)sizeof (long));
610	New (0, stack->sptr, STACKSIZE, long);
611	}
612	}
613	else
614	stack->sptr = 0;
615
616	ctx->stack = stack;
617	}
618
619	static void	536	static void
620	deallocate_stack (Coro__State ctx)	537	setup_coro (pTHX_ struct coro *coro)
621	{
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{
628	if (!--stack->refcnt)
629	{
630	#ifdef HAVE_MMAP
631	if (stack->ssize > 0 && stack->sptr)
632	munmap (stack->sptr, stack->ssize);
633	else
634	#endif
635	Safefree (stack->sptr);
636
637	Safefree (stack);
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}
643
644	static void
645	setup_coro (void *arg)
646	{	538	{
647	/*	539	/*
648	* emulate part of the perl startup here.	540	* emulate part of the perl startup here.
649	*/	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	{
650	dTHX;	608	dTHX;
651	dSP;
652	Coro__State ctx = (Coro__State)arg;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654		609
655	coro_init_stacks (aTHX);	610	/* coro_run is the alternative tail of transfer(), so unlock here. */
656	/*PL_curcop = 0;*/	611	UNLOCK;
657	/*PL_in_eval = PL_in_eval;*/ /* inherit */
658	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660		612
661	SPAGAIN;
662
663	if (ctx->stack)
664	{
665	ctx->cursp = 0;
666
667	PUSHMARK(SP);
668	PUTBACK;
669	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671	if (SvTRUE (ERRSV))
672	croak (NULL);
673	else
674	croak ("FATAL: CCTXT coroutine returned!");
675	}
676	else
677	{
678	UNOP myop;
679
680	PL_op = (OP *)&myop;
681
682	Zero(&myop, 1, UNOP);
683	myop.op_next = Nullop;
684	myop.op_flags = OPf_WANT_VOID;
685
686	PUSHMARK(SP);
687	XPUSHs (sub_init);
688	/*
689	* the next line is slightly wrong, as PL_op->op_next
690	* is actually being executed so we skip the first op.
691	* that doesn't matter, though, since it is only
692	* pp_nextstate and we never return...
693	* ah yes, and I don't care anyways ;)
694	*/
695	PUTBACK;
696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697	SPAGAIN;
698
699	ENTER; /* necessary e.g. for dounwind */
700	}
701	}
702
703	static void
704	continue_coro (void *arg)
705	{
706	/*	613	/*
707	* this is a _very_ stripped down perl interpreter ;)	614	* this is a _very_ stripped down perl interpreter ;)
708	*/	615	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711
712	PL_top_env = &ctx->start_env;	616	PL_top_env = &PL_start_env;
713		617
714	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
715	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
716	CALLRUNOPS(aTHX);	715	return cctx_new ();
717
718	abort ();
719	}	716	}
720		717
721	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
722	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	741	transfer (pTHX_ struct coro *prev, struct coro *next)
723	{	742	{
724	dSTACKLEVEL;	743	dSTACKLEVEL;
725		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	}
726	if (prev != next)	751	else if (prev != next)
727	{	752	{
728	if (next->mainstack)	753	coro_cctx *prev__cctx;
		754
		755	if (prev->flags & CF_NEW)
729	{	756	{
730	LOCK;	757	/* create a new empty context */
731	SAVE (prev, flags);	758	Newz (0, prev->cctx, 1, coro_cctx);
732	LOAD (next);	759	prev->cctx->inuse = 1;
733	UNLOCK;	760	prev->flags &= ~CF_NEW;
734		761	prev->flags |= CF_RUNNING;
735	/* mark this state as in-use */
736	next->mainstack = 0;
737	next->tmps_ix = -2;
738
739	/* stacklevel changed? if yes, grab the stack for us! */
740	if (flags & TRANSFER_SAVE_CCTXT)
741	{
742	if (!prev->stack)
743	allocate_stack (prev, 0);
744	else if (prev->cursp != stacklevel
745	&& prev->stack->usecnt > 1)
746	{
747	prev->gencnt = ++prev->stack->gencnt;
748	prev->stack->usecnt = 1;
749	}
750
751	/* has our stack been invalidated? */
752	if (next->stack && next->stack->gencnt != next->gencnt)
753	{
754	deallocate_stack (next);
755	allocate_stack (next, 1);
756	coro_create (&(next->stack->cctx),
757	continue_coro, (void *)next,
758	next->stack->sptr, labs (next->stack->ssize));
759	}
760
761	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
762	prev->cursp = stacklevel;
763	/* don't add any code here */
764	}
765	else
766	next->cursp = stacklevel;
767	}	762	}
768	else if (next->tmps_ix == -2)	763
769	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	}
770	else	790	else
771	{	791	{
772	LOCK;	792	/* coroutine already started */
773	SAVE (prev, -1); /* first get rid of the old state */	793	save_perl (aTHX_ prev);
774	UNLOCK;	794	load_perl (aTHX_ next);
775
776	if (flags & TRANSFER_SAVE_CCTXT)
777	{
778	if (!prev->stack)
779	allocate_stack (prev, 0);
780
781	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
782	{
783	PL_top_env = &next->start_env;
784
785	setup_coro (next);
786	next->cursp = stacklevel;
787
788	prev->stack->refcnt++;
789	prev->stack->usecnt++;
790	next->stack = prev->stack;
791	next->gencnt = prev->gencnt;
792	}
793	else
794	{
795	assert (!next->stack);
796	allocate_stack (next, 1);
797	coro_create (&(next->stack->cctx),
798	setup_coro, (void *)next,
799	next->stack->sptr, labs (next->stack->ssize));
800	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
801	prev->cursp = stacklevel;
802	/* don't add any code here */
803	}
804	}
805	else
806	{
807	setup_coro (next);
808	next->cursp = stacklevel;
809	}
810	}	795	}
811	}
812		796
813	LOCK;	797	prev__cctx = prev->cctx;
814	if (coro_mortal)	798
815	{	799	/* possibly "free" the cctx */
816	SvREFCNT_dec (coro_mortal);	800	if (prev__cctx->idle_sp == STACKLEVEL)
817	coro_mortal = 0;	801	{
818	}	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);
819	UNLOCK;	826	UNLOCK;
		827	}
820	}	828	}
821		829
822	#define SV_CORO(sv,func) \	830	struct transfer_args
823	do { \	831	{
824	if (SvROK (sv)) \	832	struct coro *prev, *next;
825	sv = SvRV (sv); \	833	};
826	\
827	if (SvTYPE (sv) == SVt_PVHV) \
828	{ \
829	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
830	\
831	if (!he) \
832	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
833	\
834	(sv) = SvRV (HeVAL(he)); \
835	} \
836	\
837	/* must also be changed inside Coro::Cont::yield */ \
838	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
839	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
840	\
841	} while(0)
842		834
843	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
844		836
		837	/** high level stuff ********************************************************/
		838
845	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
846	api_transfer(pTHX_ SV *prev, SV *next, int flags)	953	api_transfer (SV *prev_sv, SV *next_sv)
847	{	954	{
848	SV_CORO (prev, "Coro::transfer");	955	dTHX;
849	SV_CORO (next, "Coro::transfer");	956	struct transfer_args ta;
850		957
851	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;
852	}	973	}
853		974
854	/** Coro ********************************************************************/	975	/** Coro ********************************************************************/
855		976
856	#define PRIO_MAX 3
857	#define PRIO_HIGH 1
858	#define PRIO_NORMAL 0
859	#define PRIO_LOW -1
860	#define PRIO_IDLE -3
861	#define PRIO_MIN -4
862
863	/* for Coro.pm */
864	static GV *coro_current, *coro_idle;
865	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
866	static int coro_nready;
867
868	static void	977	static void
869	coro_enq (pTHX_ SV *sv)	978	coro_enq (pTHX_ SV *coro_sv)
870	{	979	{
871	SV **xprio;
872	int prio;
873
874	if (SvTYPE (sv) != SVt_PVHV)
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
878	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
879
880	prio = prio > PRIO_MAX ? PRIO_MAX
881	: prio < PRIO_MIN ? PRIO_MIN
882	: prio;
883
884	av_push (coro_ready [prio - PRIO_MIN], sv);	980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
885	coro_nready++;
886	}	981	}
887		982
888	static SV *	983	static SV *
889	coro_deq (pTHX_ int min_prio)	984	coro_deq (pTHX_ int min_prio)
890	{	985	{
…		…
893	min_prio -= PRIO_MIN;	988	min_prio -= PRIO_MIN;
894	if (min_prio < 0)	989	if (min_prio < 0)
895	min_prio = 0;	990	min_prio = 0;
896		991
897	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
898	if (av_len (coro_ready[prio]) >= 0)	993	if (AvFILLp (coro_ready [prio]) >= 0)
899	{
900	coro_nready--;
901	return av_shift (coro_ready[prio]);	994	return av_shift (coro_ready [prio]);
902	}
903		995
904	return 0;	996	return 0;
905	}	997	}
906		998
907	static void	999	static int
908	api_ready (SV *coro)	1000	api_ready (SV *coro_sv)
909	{	1001	{
910	dTHX;	1002	dTHX;
		1003	struct coro *coro;
911		1004
912	if (SvROK (coro))	1005	if (SvROK (coro_sv))
913	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;
914		1014
915	LOCK;	1015	LOCK;
916	coro_enq (aTHX_ SvREFCNT_inc (coro));	1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1017	++coro_nready;
917	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;
918	}	1107	}
919		1108
920	static void	1109	static void
921	api_schedule (void)	1110	api_schedule (void)
922	{	1111	{
923	dTHX;	1112	dTHX;
		1113	struct transfer_args ta;
924		1114
925	SV *prev, *next;	1115	prepare_schedule (aTHX_ &ta);
926		1116	TRANSFER (ta);
927	LOCK;
928
929	prev = SvRV (GvSV (coro_current));
930	next = coro_deq (aTHX_ PRIO_MIN);
931
932	if (!next)
933	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
934
935	/* free this only after the transfer */
936	coro_mortal = prev;
937	SV_CORO (prev, "Coro::schedule");
938
939	SvRV (GvSV (coro_current)) = next;
940
941	SV_CORO (next, "Coro::schedule");
942
943	UNLOCK;
944
945	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
946	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
947	}	1117	}
948		1118
949	static void	1119	static int
950	api_cede (void)	1120	api_cede (void)
951	{	1121	{
952	dTHX;	1122	dTHX;
		1123	struct transfer_args ta;
953		1124
954	LOCK;	1125	prepare_cede (aTHX_ &ta);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957		1126
958	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;
959	}	1149	}
960		1150
961	MODULE = Coro::State PACKAGE = Coro::State	1151	MODULE = Coro::State PACKAGE = Coro::State
962		1152
963	PROTOTYPES: ENABLE	1153	PROTOTYPES: DISABLE
964		1154
965	BOOT:	1155	BOOT:
966	{ /* {} necessary for stoopid perl-5.6.x */	1156	{
967	#ifdef USE_ITHREADS	1157	#ifdef USE_ITHREADS
968	MUTEX_INIT (&coro_mutex);	1158	MUTEX_INIT (&coro_mutex);
969	#endif	1159	#endif
		1160	BOOT_PAGESIZE;
970		1161
971	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
972	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
973	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
974		1163
975	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
976	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1165	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
977	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));
978	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1168	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
979		1169
980	main_mainstack = PL_mainstack;	1170	main_mainstack = PL_mainstack;
981		1171
982	coroapi.ver = CORO_API_VERSION;	1172	coroapi.ver = CORO_API_VERSION;
983	coroapi.transfer = api_transfer;	1173	coroapi.transfer = api_transfer;
984	}
985		1174
986	Coro::State	1175	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
987	_newprocess(args)	1176	}
988	SV * args	1177
989	PROTOTYPE: $	1178	SV *
		1179	new (char *klass, ...)
990	CODE:	1180	CODE:
991	Coro__State coro;	1181	{
		1182	struct coro *coro;
		1183	HV *hv;
		1184	int i;
992		1185
993	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
994	croak ("Coro::State::_newprocess expects an arrayref");
995
996	Newz (0, coro, 1, struct coro);	1186	Newz (0, coro, 1, struct coro);
		1187	coro->args = newAV ();
		1188	coro->save = CORO_SAVE_ALL;
		1189	coro->flags = CF_NEW;
997		1190
998	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1191	hv = newHV ();
999	/*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;
1000	/*coro->stack = 0;*/	1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1001		1194
1002	/* same as JMPENV_BOOTSTRAP */	1195	for (i = 1; i < items; i++)
1003	/* we might be able to recycle start_env, but safe is safe */	1196	av_push (coro->args, newSVsv (ST (i)));
1004	/*Zero(&coro->start_env, 1, JMPENV);*/	1197	}
1005	coro->start_env.je_ret = -1;
1006	coro->start_env.je_mustcatch = TRUE;
1007
1008	RETVAL = coro;
1009	OUTPUT:	1198	OUTPUT:
1010	RETVAL	1199	RETVAL
1011		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
1012	void	1208	void
1013	transfer(prev, next, flags)	1209	_set_stacklevel (...)
1014	SV *prev	1210	ALIAS:
1015	SV *next	1211	Coro::State::transfer = 1
1016	int flags	1212	Coro::schedule = 2
1017	PROTOTYPE: @	1213	Coro::cede = 3
		1214	Coro::cede_notself = 4
1018	CODE:	1215	CODE:
1019	PUTBACK;	1216	{
1020	SV_CORO (next, "Coro::transfer");	1217	struct transfer_args ta;
1021	SV_CORO (prev, "Coro::transfer");	1218
1022	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1219	switch (ix)
1023	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
1024		1261
1025	void	1262	void
1026	DESTROY(coro)
1027	Coro::State coro
1028	CODE:
1029
1030	if (coro->mainstack && coro->mainstack != main_mainstack)
1031	{
1032	struct coro temp;
1033
1034	PUTBACK;
1035	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1036	LOAD (aTHX_ coro);
1037	SPAGAIN;
1038
1039	destroy_stacks (aTHX);
1040
1041	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1042	SPAGAIN;
1043
1044	coro->mainstack = 0;
1045	}
1046
1047	deallocate_stack (coro);
1048	SvREFCNT_dec (coro->args);
1049	Safefree (coro);
1050
1051	void
1052	_exit(code)	1263	_exit (code)
1053	int code	1264	int code
1054	PROTOTYPE: $	1265	PROTOTYPE: $
1055	CODE:	1266	CODE:
1056	_exit (code);	1267	_exit (code);
1057		1268
1058	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
1059		1277
1060	# 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
1061		1284
1062	void	1285	int
1063	yield(...)	1286	cctx_idle ()
1064	PROTOTYPE: @	1287	CODE:
1065	CODE:	1288	RETVAL = cctx_idle;
1066	SV *yieldstack;	1289	OUTPUT:
1067	SV *sv;	1290	RETVAL
1068	AV *defav = GvAV (PL_defgv);
1069	struct coro *prev, *next;
1070
1071	yieldstack = *hv_fetch (
1072	(HV *)SvRV (GvSV (coro_current)),
1073	"yieldstack", sizeof ("yieldstack") - 1,
1074	0
1075	);
1076
1077	/* set up @_ -- ugly */
1078	av_clear (defav);
1079	av_fill (defav, items - 1);
1080	while (items--)
1081	av_store (defav, items, SvREFCNT_inc (ST(items)));
1082
1083	sv = av_pop ((AV *)SvRV (yieldstack));
1084	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1085	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1086	SvREFCNT_dec (sv);
1087
1088	transfer (aTHX_ prev, next, 0);
1089		1291
1090	MODULE = Coro::State PACKAGE = Coro	1292	MODULE = Coro::State PACKAGE = Coro
1091		1293
1092	# this is slightly dirty (should expose a c-level api)
1093
1094	BOOT:	1294	BOOT:
1095	{	1295	{
1096	int i;	1296	int i;
		1297
1097	HV *stash = gv_stashpv ("Coro", TRUE);	1298	coro_stash = gv_stashpv ("Coro", TRUE);
1098		1299
1099	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1300	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1100	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1301	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1101	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1302	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1102	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1303	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1103	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1304	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1104	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1305	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1105		1306
1106	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1307	coro_current = get_sv ("Coro::current", FALSE);
1107	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1308	SvREADONLY_on (coro_current);
1108		1309
1109	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1310	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1110	coro_ready[i] = newAV ();	1311	coro_ready[i] = newAV ();
1111		1312
1112	{	1313	{
1113	SV *sv = perl_get_sv("Coro::API", 1);	1314	SV *sv = perl_get_sv("Coro::API", 1);
1114		1315
1115	coroapi.schedule = api_schedule;	1316	coroapi.schedule = api_schedule;
		1317	coroapi.save = api_save;
1116	coroapi.cede = api_cede;	1318	coroapi.cede = api_cede;
		1319	coroapi.cede_notself = api_cede_notself;
1117	coroapi.ready = api_ready;	1320	coroapi.ready = api_ready;
		1321	coroapi.is_ready = api_is_ready;
1118	coroapi.nready = &coro_nready;	1322	coroapi.nready = &coro_nready;
1119	coroapi.current = coro_current;	1323	coroapi.current = coro_current;
1120		1324
1121	GCoroAPI = &coroapi;	1325	GCoroAPI = &coroapi;
1122	sv_setiv(sv, (IV)&coroapi);	1326	sv_setiv (sv, (IV)&coroapi);
1123	SvREADONLY_on(sv);	1327	SvREADONLY_on (sv);
1124	}	1328	}
1125	}	1329	}
1126		1330
1127	#if !PERL_MICRO
1128
1129	void	1331	void
1130	ready(self)	1332	_set_current (SV *current)
1131	SV * self
1132	PROTOTYPE: $	1333	PROTOTYPE: $
1133	CODE:	1334	CODE:
1134	api_ready (self);	1335	SvREFCNT_dec (SvRV (coro_current));
1135		1336	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1136	#endif
1137		1337
1138	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
1139	nready(...)	1377	nready (...)
1140	PROTOTYPE:	1378	PROTOTYPE:
1141	CODE:	1379	CODE:
1142	RETVAL = coro_nready;	1380	RETVAL = coro_nready;
1143	OUTPUT:	1381	OUTPUT:
1144	RETVAL	1382	RETVAL
1145		1383
1146	void	1384	MODULE = Coro::State PACKAGE = Coro::AIO
1147	schedule(...)	1385
1148	PROTOTYPE:	1386	SV *
		1387	_get_state ()
1149	CODE:	1388	CODE:
1150	api_schedule ();
1151
1152	void
1153	cede(...)
1154	PROTOTYPE:
1155	CODE:
1156	api_cede ();
1157
1158	# and these are hacks
1159	SV *
1160	_aio_get_state ()
1161	CODE:
1162	{	1389	{
1163	struct {	1390	struct io_state *data;
1164	int errorno;
1165	int laststype;
1166	int laststatval;
1167	Stat_t statcache;
1168	} data;
1169		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
1170	data.errorno = errno;	1397	data->errorno = errno;
1171	data.laststype = PL_laststype;	1398	data->laststype = PL_laststype;
1172	data.laststatval = PL_laststatval;	1399	data->laststatval = PL_laststatval;
1173	data.statcache = PL_statcache;	1400	data->statcache = PL_statcache;
1174
1175	RETVAL = newSVpvn ((char *)&data, sizeof data);
1176	}	1401	}
1177	OUTPUT:	1402	OUTPUT:
1178	RETVAL	1403	RETVAL
1179		1404
1180	void	1405	void
1181	_aio_set_state (char *data_)	1406	_set_state (char *data_)
1182	PROTOTYPE: $	1407	PROTOTYPE: $
1183	CODE:	1408	CODE:
1184	{	1409	{
1185	struct {	1410	struct io_state *data = (void *)data_;
1186	int errorno;
1187	int laststype;
1188	int laststatval;
1189	Stat_t statcache;
1190	} *data = (void *)data_;
1191		1411
1192	errno = data->errorno;	1412	errno = data->errorno;
1193	PL_laststype = data->laststype;	1413	PL_laststype = data->laststype;
1194	PL_laststatval = data->laststatval;	1414	PL_laststatval = data->laststatval;
1195	PL_statcache = data->statcache;	1415	PL_statcache = data->statcache;
1196	}	1416	}
		1417

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