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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 1.152 by root, Thu Sep 20 12:02:25 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 */
		134	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	135	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 */	136	static SV *coro_mortal; /* will be freed after next transfer */
75		137
76	/* this is actually not only the c stack but also c registers etc... */	138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
		141	/* this is a structure representing a c-level coroutine */
77	typedef struct {	142	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		144
		145	/* the stack */
		146	void *sptr;
		147	size_t ssize;
		148
		149	/* cpu state */
		150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		152	JMPENV *top_env;
82	coro_context cctx;	153	coro_context cctx;
83		154
84	void *sptr;	155	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
86	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
87		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
		167
		168	/* this is a structure representing a perl-level coroutine */
88	struct coro {	169	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	170	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	171	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		172
135	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
136	AV *args;	174	AV *args;
		175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
		178
		179	/* optionally saved, might be zero */
		180	AV *defav; /* @_ */
		181	SV *defsv; /* $_ */
		182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
		186
		187	#define VAR(name,type) type name;
		188	# include "state.h"
		189	#undef VAR
		190
		191	/* coro process data */
		192	int prio;
		193
		194	/* linked list */
		195	struct coro *next, *prev;
		196	HV *hv; /* the perl hash associated with this coro, if any */
137	};	197	};
138		198
139	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
141		201
142	/* mostly copied from op.c:cv_clone2 */	202	/** Coro ********************************************************************/
143	STATIC AV *	203
144	clone_padlist (pTHX_ AV *protopadlist)	204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *first;
		216
		217	/** lowlevel stuff **********************************************************/
		218
		219	static AV *
		220	coro_clone_padlist (pTHX_ CV *cv)
145	{	221	{
146	AV *av;	222	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;	223	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		224
165	newpadlist = newAV ();	225	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
		230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		231	#endif
		232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		233	--AvFILLp (padlist);
		234
		235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	236	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		237
239	return newpadlist;	238	return newpadlist;
240	}	239	}
241		240
242	STATIC void	241	static void
243	free_padlist (pTHX_ AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
244	{	243	{
245	/* may be during global destruction */	244	/* may be during global destruction */
246	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
247	{	246	{
…		…
261		260
262	SvREFCNT_dec ((SV*)padlist);	261	SvREFCNT_dec ((SV*)padlist);
263	}	262	}
264	}	263	}
265		264
266	STATIC int	265	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	266	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	267	{
269	AV *padlist;	268	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
271		270
272	/* casting is fun. */	271	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	273	free_padlist (aTHX_ padlist);
275		274
276	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
		276
		277	return 0;
277	}	278	}
278		279
279	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
280		281
281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
282		283
		284	#define CORO_MAGIC(cv) \
		285	SvMAGIC (cv) \
		286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		287	? SvMAGIC (cv) \
		288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		289	: 0
		290
283	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
284	STATIC void	292	static void
285	get_padlist (pTHX_ CV *cv)	293	get_padlist (pTHX_ CV *cv)
286	{	294	{
287	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
288		297
289	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
290	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	300	else
		301	{
		302	#if CORO_PREFER_PERL_FUNCTIONS
		303	/* this is probably cleaner, but also slower? */
		304	CV *cp = Perl_cv_clone (cv);
		305	CvPADLIST (cv) = CvPADLIST (cp);
		306	CvPADLIST (cp) = 0;
		307	SvREFCNT_dec (cp);
		308	#else
292	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		310	#endif
		311	}
293	}	312	}
294		313
295	STATIC void	314	static void
296	put_padlist (pTHX_ CV *cv)	315	put_padlist (pTHX_ CV *cv)
297	{	316	{
298	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
299		319
300	if (!mg)	320	if (!mg)
301	{	321	{
302	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
303	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
304	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
305	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
306	}	326	}
307		327
308	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	328	av = (AV *)mg->mg_obj;
		329
		330	if (AvFILLp (av) >= AvMAX (av))
		331	av_extend (av, AvMAX (av) + 1);
		332
		333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
309	}	334	}
		335
		336	/** load & save, init *******************************************************/
310		337
311	#define SB do {	338	#define SB do {
312	#define SE } while (0)	339	#define SE } while (0)
313		340
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	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
318		342
319	static void	343	static void
320	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
321	{	345	{
322	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
323	PL_in_eval = c->in_eval;	347	# include "state.h"
324		348	#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		349
353	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
354	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
355	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
356		369
357	{	370	{
358	dSP;	371	dSP;
359	CV *cv;	372	CV *cv;
360		373
361	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
362	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
363	{	376	{
364	AV *padlist = (AV *)POPs;
365
366	if (padlist)
367	{
368	put_padlist (aTHX_ cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
369	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
370	}	379	CvPADLIST (cv) = (AV *)POPs;
371
372	++CvDEPTH(cv);
373	}	380	}
374		381
375	PUTBACK;	382	PUTBACK;
376	}	383	}
377	}	384	}
378		385
379	static void	386	static void
380	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
381	{	388	{
382	{	389	{
383	dSP;	390	dSP;
384	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
385	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
388	/*	395	/*
389	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
390	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
391	*/	398	*/
392		399
		400	EXTEND (SP, 3 + 1);
393	PUSHs (Nullsv);	401	PUSHs (Nullsv);
394	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
395	for (;;)	403	for (;;)
396	{	404	{
397	while (cxix >= 0)	405	while (cxix >= 0)
398	{	406	{
399	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
400		408
401	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
402	{	410	{
403	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
404	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
405	{	414	{
406	EXTEND (SP, CvDEPTH(cv)*2);	415	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));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
416	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
417		419
		420	CvDEPTH (cv) = 0;
418	get_padlist (aTHX_ cv); /* this is a monster */	421	get_padlist (aTHX_ cv);
419	}	422	}
420	}	423	}
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	}	424	}
430		425
431	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
432	break;	427	break;
433		428
…		…
437	}	432	}
438		433
439	PUTBACK;	434	PUTBACK;
440	}	435	}
441		436
442	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	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;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
444	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
445		442
446	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
447	c->in_eval = PL_in_eval;	444	# include "state.h"
448		445	#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	}	446	}
477		447
478	/*	448	/*
479	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
480	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
481	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
482	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
483	*/	453	*/
484	STATIC void	454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
		457	static void
485	coro_init_stacks (pTHX)	458	coro_init_stacks (pTHX)
486	{	459	{
487	LOCK;
488
489	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
490	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
491	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493		464
494	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
495	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
496	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
497		468
498	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
499	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
500	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
501	PL_tmps_max = 96;	472	PL_tmps_max = 128;
502		473
503	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
504	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
505	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
506		477
507	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
508	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
509	#endif	480	#endif
510		481
511	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
512	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
513	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
514		485
515	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
516	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
517	PL_savestack_max = 96;	488	PL_savestack_max = 64;
518		489
		490	#if !PERL_VERSION_ATLEAST (5,9,0)
519	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
520	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
521	PL_retstack_max = 8;	493	PL_retstack_max = 16;
522		494	#endif
523	UNLOCK;
524	}	495	}
		496	#endif
525		497
526	/*	498	/*
527	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
528	*/	500	*/
529	STATIC void	501	static void
530	destroy_stacks(pTHX)	502	coro_destroy_stacks (pTHX)
531	{	503	{
532	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
533	{	505	{
534	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
535	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
536		509
537	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
538	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
539		513
		514	/* unwind all extra stacks */
540	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
541	}	519	}
542		520
543	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
544	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
545		523
546	while (PL_curstackinfo)	524	while (PL_curstackinfo)
547	{	525	{
548	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
549		527
550	{ /*D*//*remove*/
551	dSP;
552	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
553	PUTBACK; /* possibly superfluous */
554	}
555
556	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
557	{
558	dounwind (-1);/*D*//*remove*/
559	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
560	}
561		530
562	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
563	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
564	PL_curstackinfo = p;	533	PL_curstackinfo = p;
565	}	534	}
566		535
567	Safefree (PL_tmps_stack);	536	Safefree (PL_tmps_stack);
568	Safefree (PL_markstack);	537	Safefree (PL_markstack);
569	Safefree (PL_scopestack);	538	Safefree (PL_scopestack);
570	Safefree (PL_savestack);	539	Safefree (PL_savestack);
		540	#if !PERL_VERSION_ATLEAST (5,9,0)
571	Safefree (PL_retstack);	541	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	542	#endif
592	{	543	}
593	/*FIXME*//*D*//* reasonable stack size! */	544
594	stack->ssize = - (8192 * sizeof (long));	545	static size_t
595	New (0, stack->sptr, 8192, long);	546	coro_rss (struct coro *coro)
596	}	547	{
		548	size_t rss = sizeof (coro);
		549
		550	if (coro->mainstack)
597	}	551	{
598	else	552	rss += sizeof (coro->curstackinfo);
599	stack->sptr = 0;	553	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		554	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
600		555
601	ctx->stack = stack;	556	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
602	}
603		557
604	static void	558	rss += coro->tmps_max * sizeof (SV *);
605	deallocate_stack (Coro__State ctx)
606	{
607	coro_stack *stack = ctx->stack;
608		559
609	ctx->stack = 0;	560	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
610		561
611	if (stack)	562	rss += coro->scopestack_max * sizeof (I32);
		563
		564	rss += coro->savestack_max * sizeof (ANY);
		565
		566	#if !PERL_VERSION_ATLEAST (5,9,0)
		567	rss += coro->retstack_max * sizeof (OP *);
		568	#endif
612	{	569	}
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		570
622	Safefree (stack);	571	return rss;
623	}
624	else if (ctx->gencnt == stack->gencnt)
625	--stack->usecnt;
626	}
627	}	572	}
628		573
		574	/** coroutine stack handling ************************************************/
		575
629	static void	576	static void
630	setup_coro (void *arg)	577	setup_coro (pTHX_ struct coro *coro)
631	{	578	{
632	/*	579	/*
633	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
634	*/	581	*/
		582	coro_init_stacks (aTHX);
		583
		584	PL_curcop = &PL_compiling;
		585	PL_in_eval = EVAL_NULL;
		586	PL_comppad = 0;
		587	PL_curpm = 0;
		588	PL_localizing = 0;
		589	PL_dirty = 0;
		590	PL_restartop = 0;
		591
		592	{
		593	dSP;
		594	LOGOP myop;
		595
		596	SvREFCNT_dec (GvAV (PL_defgv));
		597	GvAV (PL_defgv) = coro->args; coro->args = 0;
		598
		599	Zero (&myop, 1, LOGOP);
		600	myop.op_next = Nullop;
		601	myop.op_flags = OPf_WANT_VOID;
		602
		603	PUSHMARK (SP);
		604	XPUSHs (av_shift (GvAV (PL_defgv)));
		605	PUTBACK;
		606	PL_op = (OP *)&myop;
		607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		608	SPAGAIN;
		609	}
		610
		611	ENTER; /* necessary e.g. for dounwind */
		612	}
		613
		614	static void
		615	free_coro_mortal (pTHX)
		616	{
		617	if (coro_mortal)
		618	{
		619	SvREFCNT_dec (coro_mortal);
		620	coro_mortal = 0;
		621	}
		622	}
		623
		624	/* inject a fake call to Coro::State::_cctx_init into the execution */
		625	/* _cctx_init should be careful, as it could be called at almost any time */
		626	/* during execution of a perl program */
		627	static void NOINLINE
		628	prepare_cctx (pTHX_ coro_cctx *cctx)
		629	{
		630	dSP;
		631	LOGOP myop;
		632
		633	Zero (&myop, 1, LOGOP);
		634	myop.op_next = PL_op;
		635	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		636
		637	PUSHMARK (SP);
		638	EXTEND (SP, 2);
		639	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		640	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		641	PUTBACK;
		642	PL_op = (OP *)&myop;
		643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		644	SPAGAIN;
		645	}
		646
		647	/*
		648	* this is a _very_ stripped down perl interpreter ;)
		649	*/
		650	static void
		651	coro_run (void *arg)
		652	{
635	dTHX;	653	dTHX;
636	dSP;
637	Coro__State ctx = (Coro__State)arg;
638	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
639		654
640	coro_init_stacks (aTHX);	655	/* coro_run is the alternative tail of transfer(), so unlock here. */
641	/*PL_curcop = 0;*/	656	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		657
646	SPAGAIN;	658	PL_top_env = &PL_start_env;
647		659
648	if (ctx->stack)	660	/* inject a fake subroutine call to cctx_init */
649	{	661	prepare_cctx (aTHX_ (coro_cctx *)arg);
650	ctx->cursp = 0;
651		662
652	PUSHMARK(SP);	663	/* somebody or something will hit me for both perl_run and PL_restartop */
653	PUTBACK;	664	PL_restartop = PL_op;
654	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	665	perl_run (PL_curinterp);
655		666
656	if (SvTRUE (ERRSV))	667	/*
657	croak (NULL);	668	* If perl-run returns we assume exit() was being called or the coro
658	else	669	* fell off the end, which seems to be the only valid (non-bug)
659	croak ("FATAL: CCTXT coroutine returned!");	670	* reason for perl_run to return. We try to exit by jumping to the
		671	* bootstrap-time "top" top_env, as we cannot restore the "main"
		672	* coroutine as Coro has no such concept
		673	*/
		674	PL_top_env = main_top_env;
		675	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		676	}
		677
		678	static coro_cctx *
		679	cctx_new ()
		680	{
		681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
		684
		685	++cctx_count;
		686
		687	Newz (0, cctx, 1, coro_cctx);
		688
		689	#if HAVE_MMAP
		690
		691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		692	/* mmap supposedly does allocate-on-write for us */
		693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		694
		695	if (cctx->sptr != (void *)-1)
		696	{
		697	# if CORO_STACKGUARD
		698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		699	# endif
		700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		702	cctx->mapped = 1;
660	}	703	}
661	else	704	else
662	{	705	#endif
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	}	706	{
686	}	707	cctx->ssize = coro_stacksize * (long)sizeof (long);
		708	New (0, cctx->sptr, coro_stacksize, long);
687		709
688	static void	710	if (!cctx->sptr)
689	continue_coro (void *arg)	711	{
690	{	712	perror ("FATAL: unable to allocate stack for coroutine");
691	/*	713	_exit (EXIT_FAILURE);
692	* this is a _very_ stripped down perl interpreter ;)	714	}
693	*/
694	dTHX;
695	Coro__State ctx = (Coro__State)arg;
696	JMPENV coro_start_env;
697		715
698	PL_top_env = &ctx->start_env;	716	stack_start = cctx->sptr;
		717	stack_size = cctx->ssize;
		718	}
699		719
700	ctx->cursp = 0;	720	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		722
		723	return cctx;
		724	}
		725
		726	static void
		727	cctx_destroy (coro_cctx *cctx)
		728	{
		729	if (!cctx)
		730	return;
		731
		732	--cctx_count;
		733
		734	#if CORO_USE_VALGRIND
		735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		736	#endif
		737
		738	#if HAVE_MMAP
		739	if (cctx->mapped)
		740	munmap (cctx->sptr, cctx->ssize);
		741	else
		742	#endif
		743	Safefree (cctx->sptr);
		744
		745	Safefree (cctx);
		746	}
		747
		748	static coro_cctx *
		749	cctx_get (pTHX)
		750	{
		751	while (cctx_first)
		752	{
		753	coro_cctx *cctx = cctx_first;
		754	cctx_first = cctx->next;
		755	--cctx_idle;
		756
		757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
		761	}
		762
701	PL_op = PL_op->op_next;	763	PL_op = PL_op->op_next;
702	CALLRUNOPS(aTHX);	764	return cctx_new ();
703
704	abort ();
705	}	765	}
706		766
707	STATIC void	767	static void
		768	cctx_put (coro_cctx *cctx)
		769	{
		770	/* free another cctx if overlimit */
		771	if (cctx_idle >= MAX_IDLE_CCTX)
		772	{
		773	coro_cctx *first = cctx_first;
		774	cctx_first = first->next;
		775	--cctx_idle;
		776
		777	assert (!first->inuse);
		778	cctx_destroy (first);
		779	}
		780
		781	++cctx_idle;
		782	cctx->next = cctx_first;
		783	cctx_first = cctx;
		784	}
		785
		786	/** coroutine switching *****************************************************/
		787
		788	/* never call directly, always through the coro_state_transfer global variable */
		789	static void NOINLINE
708	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	790	transfer (pTHX_ struct coro *prev, struct coro *next)
709	{	791	{
710	dSTACKLEVEL;	792	dSTACKLEVEL;
711		793
		794	/* sometimes transfer is only called to set idle_sp */
		795	if (!next)
		796	{
		797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		798	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		799	}
712	if (prev != next)	800	else if (prev != next)
713	{	801	{
714	if (next->mainstack)	802	coro_cctx *prev__cctx;
		803
		804	if (prev->flags & CF_NEW)
715	{	805	{
716	LOCK;	806	/* create a new empty context */
717	SAVE (prev, flags);	807	Newz (0, prev->cctx, 1, coro_cctx);
718	LOAD (next);	808	prev->cctx->inuse = 1;
719	UNLOCK;	809	prev->flags &= ~CF_NEW;
720		810	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	}	811	}
754	else if (next->tmps_ix == -2)	812
755	croak ("tried to transfer to running coroutine");	813	/*TODO: must not croak here */
		814	if (!prev->flags & CF_RUNNING)
		815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		816
		817	if (next->flags & CF_RUNNING)
		818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		819
		820	if (next->flags & CF_DESTROYED)
		821	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		822
		823	prev->flags &= ~CF_RUNNING;
		824	next->flags |= CF_RUNNING;
		825
		826	LOCK;
		827
		828	if (next->flags & CF_NEW)
		829	{
		830	/* need to start coroutine */
		831	next->flags &= ~CF_NEW;
		832	/* first get rid of the old state */
		833	save_perl (aTHX_ prev);
		834	/* setup coroutine call */
		835	setup_coro (aTHX_ next);
		836	/* need a new stack */
		837	assert (!next->cctx);
		838	}
756	else	839	else
757	{	840	{
758	LOCK;	841	/* coroutine already started */
759	SAVE (prev, -1); /* first get rid of the old state */	842	save_perl (aTHX_ prev);
760	UNLOCK;	843	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	}	844	}
797	}
798		845
799	LOCK;	846	prev__cctx = prev->cctx;
800	if (coro_mortal)	847
801	{	848	/* possibly "free" the cctx */
802	SvREFCNT_dec (coro_mortal);	849	if (prev__cctx->idle_sp == STACKLEVEL)
803	coro_mortal = 0;	850	{
804	}	851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		853
		854	prev->cctx = 0;
		855
		856	cctx_put (prev__cctx);
		857	prev__cctx->inuse = 0;
		858	}
		859
		860	if (!next->cctx)
		861	{
		862	next->cctx = cctx_get (aTHX);
		863	assert (!next->cctx->inuse);
		864	next->cctx->inuse = 1;
		865	}
		866
		867	if (prev__cctx != next->cctx)
		868	{
		869	prev__cctx->top_env = PL_top_env;
		870	PL_top_env = next->cctx->top_env;
		871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		872	}
		873
		874	free_coro_mortal (aTHX);
805	UNLOCK;	875	UNLOCK;
		876	}
806	}	877	}
807		878
808	#define SV_CORO(sv,func) \	879	struct transfer_args
809	do { \	880	{
810	if (SvROK (sv)) \	881	struct coro *prev, *next;
811	sv = SvRV (sv); \	882	};
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		883
829	#define SvSTATE(sv) (struct coro *)SvIV (sv)	884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
830		885
		886	/** high level stuff ********************************************************/
		887
831	static void	888	static int
		889	coro_state_destroy (pTHX_ struct coro *coro)
		890	{
		891	if (coro->flags & CF_DESTROYED)
		892	return 0;
		893
		894	coro->flags |= CF_DESTROYED;
		895
		896	if (coro->flags & CF_READY)
		897	{
		898	/* reduce nready, as destroying a ready coro effectively unreadies it */
		899	/* alternative: look through all ready queues and remove the coro */
		900	LOCK;
		901	--coro_nready;
		902	UNLOCK;
		903	}
		904	else
		905	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		906
		907	if (coro->mainstack && coro->mainstack != main_mainstack)
		908	{
		909	struct coro temp;
		910
		911	assert (!(coro->flags & CF_RUNNING));
		912
		913	Zero (&temp, 1, struct coro);
		914	temp.save = CORO_SAVE_ALL;
		915
		916	if (coro->flags & CF_RUNNING)
		917	croak ("FATAL: tried to destroy currently running coroutine");
		918
		919	save_perl (aTHX_ &temp);
		920	load_perl (aTHX_ coro);
		921
		922	coro_destroy_stacks (aTHX);
		923
		924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		925
		926	coro->mainstack = 0;
		927	}
		928
		929	cctx_destroy (coro->cctx);
		930	SvREFCNT_dec (coro->args);
		931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == first) first = coro->next;
		935
		936	return 1;
		937	}
		938
		939	static int
		940	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		941	{
		942	struct coro *coro = (struct coro *)mg->mg_ptr;
		943	mg->mg_ptr = 0;
		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
		949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
		952
		953	return 0;
		954	}
		955
		956	static int
		957	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		958	{
		959	struct coro *coro = (struct coro *)mg->mg_ptr;
		960
		961	++coro->refcnt;
		962
		963	return 0;
		964	}
		965
		966	static MGVTBL coro_state_vtbl = {
		967	0, 0, 0, 0,
		968	coro_state_free,
		969	0,
		970	#ifdef MGf_DUP
		971	coro_state_dup,
		972	#else
		973	# define MGf_DUP 0
		974	#endif
		975	};
		976
		977	static struct coro *
		978	SvSTATE_ (pTHX_ SV *coro)
		979	{
		980	HV *stash;
		981	MAGIC *mg;
		982
		983	if (SvROK (coro))
		984	coro = SvRV (coro);
		985
		986	stash = SvSTASH (coro);
		987	if (stash != coro_stash && stash != coro_state_stash)
		988	{
		989	/* very slow, but rare, check */
		990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		991	croak ("Coro::State object required");
		992	}
		993
		994	mg = CORO_MAGIC (coro);
		995	return (struct coro *)mg->mg_ptr;
		996	}
		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
		1000	static void
		1001	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1002	{
		1003	ta->prev = SvSTATE (prev_sv);
		1004	ta->next = SvSTATE (next_sv);
		1005	}
		1006
		1007	static void
832	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1008	api_transfer (SV *prev_sv, SV *next_sv)
833	{	1009	{
834	SV_CORO (prev, "Coro::transfer");	1010	dTHX;
835	SV_CORO (next, "Coro::transfer");	1011	struct transfer_args ta;
836		1012
837	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1014	TRANSFER (ta);
		1015	}
		1016
		1017	static int
		1018	api_save (SV *coro_sv, int new_save)
		1019	{
		1020	dTHX;
		1021	struct coro *coro = SvSTATE (coro_sv);
		1022	int old_save = coro->save;
		1023
		1024	if (new_save >= 0)
		1025	coro->save = new_save;
		1026
		1027	return old_save;
838	}	1028	}
839		1029
840	/** Coro ********************************************************************/	1030	/** Coro ********************************************************************/
841		1031
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	1032	static void
855	coro_enq (pTHX_ SV *sv)	1033	coro_enq (pTHX_ SV *coro_sv)
856	{	1034	{
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);	1035	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	}	1036	}
874		1037
875	static SV *	1038	static SV *
876	coro_deq (pTHX_ int min_prio)	1039	coro_deq (pTHX_ int min_prio)
877	{	1040	{
…		…
880	min_prio -= PRIO_MIN;	1043	min_prio -= PRIO_MIN;
881	if (min_prio < 0)	1044	if (min_prio < 0)
882	min_prio = 0;	1045	min_prio = 0;
883		1046
884	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
885	if (av_len (coro_ready[prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
886	{
887	coro_nready--;
888	return av_shift (coro_ready[prio]);	1049	return av_shift (coro_ready [prio]);
889	}
890		1050
891	return 0;	1051	return 0;
892	}	1052	}
893		1053
894	static void	1054	static int
895	api_ready (SV *coro)	1055	api_ready (SV *coro_sv)
896	{	1056	{
897	dTHX;	1057	dTHX;
		1058	struct coro *coro;
898		1059
899	if (SvROK (coro))	1060	if (SvROK (coro_sv))
900	coro = SvRV (coro);	1061	coro_sv = SvRV (coro_sv);
		1062
		1063	coro = SvSTATE (coro_sv);
		1064
		1065	if (coro->flags & CF_READY)
		1066	return 0;
		1067
		1068	coro->flags |= CF_READY;
901		1069
902	LOCK;	1070	LOCK;
903	coro_enq (aTHX_ SvREFCNT_inc (coro));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1072	++coro_nready;
904	UNLOCK;	1073	UNLOCK;
		1074
		1075	return 1;
		1076	}
		1077
		1078	static int
		1079	api_is_ready (SV *coro_sv)
		1080	{
		1081	dTHX;
		1082	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1083	}
		1084
		1085	static void
		1086	prepare_schedule (pTHX_ struct transfer_args *ta)
		1087	{
		1088	SV *prev_sv, *next_sv;
		1089
		1090	for (;;)
		1091	{
		1092	LOCK;
		1093	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1094
		1095	/* nothing to schedule: call the idle handler */
		1096	if (!next_sv)
		1097	{
		1098	dSP;
		1099	UNLOCK;
		1100
		1101	ENTER;
		1102	SAVETMPS;
		1103
		1104	PUSHMARK (SP);
		1105	PUTBACK;
		1106	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1107
		1108	FREETMPS;
		1109	LEAVE;
		1110	continue;
		1111	}
		1112
		1113	ta->next = SvSTATE (next_sv);
		1114
		1115	/* cannot transfer to destroyed coros, skip and look for next */
		1116	if (ta->next->flags & CF_DESTROYED)
		1117	{
		1118	UNLOCK;
		1119	SvREFCNT_dec (next_sv);
		1120	/* coro_nready is already taken care of by destroy */
		1121	continue;
		1122	}
		1123
		1124	--coro_nready;
		1125	UNLOCK;
		1126	break;
		1127	}
		1128
		1129	/* free this only after the transfer */
		1130	prev_sv = SvRV (coro_current);
		1131	SvRV_set (coro_current, next_sv);
		1132	ta->prev = SvSTATE (prev_sv);
		1133
		1134	assert (ta->next->flags & CF_READY);
		1135	ta->next->flags &= ~CF_READY;
		1136
		1137	LOCK;
		1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
		1140	UNLOCK;
		1141	}
		1142
		1143	static void
		1144	prepare_cede (pTHX_ struct transfer_args *ta)
		1145	{
		1146	api_ready (coro_current);
		1147	prepare_schedule (aTHX_ ta);
		1148	}
		1149
		1150	static int
		1151	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1152	{
		1153	if (coro_nready)
		1154	{
		1155	SV *prev = SvRV (coro_current);
		1156	prepare_schedule (aTHX_ ta);
		1157	api_ready (prev);
		1158	return 1;
		1159	}
		1160	else
		1161	return 0;
905	}	1162	}
906		1163
907	static void	1164	static void
908	api_schedule (void)	1165	api_schedule (void)
909	{	1166	{
910	dTHX;	1167	dTHX;
		1168	struct transfer_args ta;
911		1169
912	SV *prev, *next;	1170	prepare_schedule (aTHX_ &ta);
913		1171	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	}	1172	}
935		1173
936	static void	1174	static int
937	api_cede (void)	1175	api_cede (void)
938	{	1176	{
939	dTHX;	1177	dTHX;
		1178	struct transfer_args ta;
940		1179
941	LOCK;	1180	prepare_cede (aTHX_ &ta);
942	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
943	UNLOCK;
944		1181
945	api_schedule ();	1182	if (ta.prev != ta.next)
		1183	{
		1184	TRANSFER (ta);
		1185	return 1;
		1186	}
		1187	else
		1188	return 0;
		1189	}
		1190
		1191	static int
		1192	api_cede_notself (void)
		1193	{
		1194	dTHX;
		1195	struct transfer_args ta;
		1196
		1197	if (prepare_cede_notself (aTHX_ &ta))
		1198	{
		1199	TRANSFER (ta);
		1200	return 1;
		1201	}
		1202	else
		1203	return 0;
946	}	1204	}
947		1205
948	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
949		1207
950	PROTOTYPES: ENABLE	1208	PROTOTYPES: DISABLE
951		1209
952	BOOT:	1210	BOOT:
953	{ /* {} necessary for stoopid perl-5.6.x */	1211	{
954	#ifdef USE_ITHREADS	1212	#ifdef USE_ITHREADS
955	MUTEX_INIT (&coro_mutex);	1213	MUTEX_INIT (&coro_mutex);
956	#endif	1214	#endif
		1215	BOOT_PAGESIZE;
957		1216
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);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961		1218
962	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
963	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
964	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1222	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
965	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
966		1226
967	main_mainstack = PL_mainstack;	1227	main_mainstack = PL_mainstack;
		1228	main_top_env = PL_top_env;
		1229
		1230	while (main_top_env->je_prev)
		1231	main_top_env = main_top_env->je_prev;
968		1232
969	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
970	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
971	}
972		1235
973	Coro::State	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
974	_newprocess(args)	1237	}
975	SV * args	1238
976	PROTOTYPE: $	1239	SV *
		1240	new (char *klass, ...)
977	CODE:	1241	CODE:
978	Coro__State coro;	1242	{
		1243	struct coro *coro;
		1244	HV *hv;
		1245	int i;
979		1246
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);	1247	Newz (0, coro, 1, struct coro);
		1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
		1250	coro->flags = CF_NEW;
984		1251
985	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1252	if (first) first->prev = coro;
986	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1253	coro->next = first;
987	/*coro->stack = 0;*/	1254	first = coro;
988		1255
989	/* same as JMPENV_BOOTSTRAP */	1256	coro->hv = hv = newHV ();
990	/* we might be able to recycle start_env, but safe is safe */	1257	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
991	/*Zero(&coro->start_env, 1, JMPENV);*/	1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
992	coro->start_env.je_ret = -1;
993	coro->start_env.je_mustcatch = TRUE;
994		1259
995	RETVAL = coro;	1260	for (i = 1; i < items; i++)
		1261	av_push (coro->args, newSVsv (ST (i)));
		1262	}
996	OUTPUT:	1263	OUTPUT:
997	RETVAL	1264	RETVAL
998		1265
		1266	int
		1267	save (SV *coro, int new_save = -1)
		1268	CODE:
		1269	RETVAL = api_save (coro, new_save);
		1270	OUTPUT:
		1271	RETVAL
		1272
		1273	int
		1274	save_also (SV *coro_sv, int save_also)
		1275	CODE:
		1276	{
		1277	struct coro *coro = SvSTATE (coro_sv);
		1278	RETVAL = coro->save;
		1279	coro->save |= save_also;
		1280	}
		1281	OUTPUT:
		1282	RETVAL
		1283
999	void	1284	void
1000	transfer(prev, next, flags)	1285	_set_stacklevel (...)
1001	SV *prev	1286	ALIAS:
1002	SV *next	1287	Coro::State::transfer = 1
1003	int flags	1288	Coro::schedule = 2
1004	PROTOTYPE: @	1289	Coro::cede = 3
		1290	Coro::cede_notself = 4
1005	CODE:	1291	CODE:
1006	PUTBACK;	1292	{
1007	SV_CORO (next, "Coro::transfer");	1293	struct transfer_args ta;
1008	SV_CORO (prev, "Coro::transfer");	1294
1009	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1295	switch (ix)
1010	SPAGAIN;	1296	{
		1297	case 0:
		1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1299	ta.next = 0;
		1300	break;
		1301
		1302	case 1:
		1303	if (items != 2)
		1304	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1305
		1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1307	break;
		1308
		1309	case 2:
		1310	prepare_schedule (aTHX_ &ta);
		1311	break;
		1312
		1313	case 3:
		1314	prepare_cede (aTHX_ &ta);
		1315	break;
		1316
		1317	case 4:
		1318	if (!prepare_cede_notself (aTHX_ &ta))
		1319	XSRETURN_EMPTY;
		1320
		1321	break;
		1322	}
		1323
		1324	BARRIER;
		1325	TRANSFER (ta);
		1326
		1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
		1333	CODE:
		1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1335	OUTPUT:
		1336	RETVAL
1011		1337
1012	void	1338	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)	1339	_exit (code)
1040	int code	1340	int code
1041	PROTOTYPE: $	1341	PROTOTYPE: $
1042	CODE:	1342	CODE:
1043	_exit (code);	1343	_exit (code);
1044		1344
1045	MODULE = Coro::State PACKAGE = Coro::Cont	1345	int
		1346	cctx_stacksize (int new_stacksize = 0)
		1347	CODE:
		1348	RETVAL = coro_stacksize;
		1349	if (new_stacksize)
		1350	coro_stacksize = new_stacksize;
		1351	OUTPUT:
		1352	RETVAL
1046		1353
1047	# this is slightly dirty (should expose a c-level api)	1354	int
		1355	cctx_count ()
		1356	CODE:
		1357	RETVAL = cctx_count;
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
		1362	cctx_idle ()
		1363	CODE:
		1364	RETVAL = cctx_idle;
		1365	OUTPUT:
		1366	RETVAL
1048		1367
1049	void	1368	void
1050	yield(...)	1369	list ()
1051	PROTOTYPE: @	1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = first; coro; coro = coro->next)
		1374	if (coro->hv)
		1375	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1376	}
		1377
		1378	void
		1379	_eval (Coro::State coro, SV *coderef)
		1380	CODE:
		1381	{
		1382	if (coro->mainstack)
		1383	{
		1384	struct coro temp;
		1385	Zero (&temp, 1, struct coro);
		1386	temp.save = CORO_SAVE_ALL;
		1387
		1388	if (!(coro->flags & CF_RUNNING))
		1389	{
		1390	save_perl (aTHX_ &temp);
		1391	load_perl (aTHX_ coro);
		1392	}
		1393
		1394	{
		1395	dSP;
		1396	ENTER;
		1397	SAVETMPS;
		1398	PUSHMARK (SP);
		1399	PUTBACK;
		1400	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1401	SPAGAIN;
		1402	FREETMPS;
		1403	LEAVE;
		1404	PUTBACK;
		1405	}
		1406
		1407	if (!(coro->flags & CF_RUNNING))
		1408	{
		1409	save_perl (aTHX_ coro);
		1410	load_perl (aTHX_ &temp);
		1411	}
		1412	}
		1413	}
		1414
		1415	SV *
		1416	is_ready (Coro::State coro)
		1417	PROTOTYPE: $
		1418	ALIAS:
		1419	is_ready = CF_READY
		1420	is_running = CF_RUNNING
		1421	is_new = CF_NEW
		1422	is_destroyed = CF_DESTROYED
		1423	CODE:
		1424	RETVAL = boolSV (coro->flags & ix);
		1425	OUTPUT:
		1426	RETVAL
		1427
		1428	IV
		1429	rss (Coro::State coro)
		1430	PROTOTYPE: $
1052	CODE:	1431	CODE:
1053	static SV *returnstk;	1432	RETVAL = coro_rss (coro);
1054	SV *sv;	1433	OUTPUT:
1055	AV *defav = GvAV (PL_defgv);	1434	RETVAL
1056	struct coro *prev, *next;
1057		1435
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		1436
1075	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1076		1438
1077	# this is slightly dirty (should expose a c-level api)
1078
1079	BOOT:	1439	BOOT:
1080	{	1440	{
1081	int i;	1441	int i;
		1442
1082	HV *stash = gv_stashpv ("Coro", TRUE);	1443	coro_stash = gv_stashpv ("Coro", TRUE);
1083		1444
1084	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1445	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1446	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090		1451
1091	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1092	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1093		1454
1094	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1095	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1096		1457
1097	{	1458	{
1098	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1099		1460
1100	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
1101	coroapi.cede = api_cede;	1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1102	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
		1466	coroapi.is_ready = api_is_ready;
1103	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1104	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1105		1469
1106	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1107	sv_setiv(sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1108	SvREADONLY_on(sv);	1472	SvREADONLY_on (sv);
1109	}	1473	}
1110	}	1474	}
1111		1475
1112	#if !PERL_MICRO
1113
1114	void	1476	void
1115	ready(self)	1477	_set_current (SV *current)
1116	SV * self
1117	PROTOTYPE: $	1478	PROTOTYPE: $
1118	CODE:	1479	CODE:
1119	api_ready (self);	1480	SvREFCNT_dec (SvRV (coro_current));
1120		1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1121	#endif
1122		1482
1123	int	1483	int
		1484	prio (Coro::State coro, int newprio = 0)
		1485	ALIAS:
		1486	nice = 1
		1487	CODE:
		1488	{
		1489	RETVAL = coro->prio;
		1490
		1491	if (items > 1)
		1492	{
		1493	if (ix)
		1494	newprio = coro->prio - newprio;
		1495
		1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1498
		1499	coro->prio = newprio;
		1500	}
		1501	}
		1502	OUTPUT:
		1503	RETVAL
		1504
		1505	SV *
		1506	ready (SV *self)
		1507	PROTOTYPE: $
		1508	CODE:
		1509	RETVAL = boolSV (api_ready (self));
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	int
1124	nready(...)	1514	nready (...)
1125	PROTOTYPE:	1515	PROTOTYPE:
1126	CODE:	1516	CODE:
1127	RETVAL = coro_nready;	1517	RETVAL = coro_nready;
1128	OUTPUT:	1518	OUTPUT:
1129	RETVAL	1519	RETVAL
1130		1520
		1521	MODULE = Coro::State PACKAGE = Coro::AIO
		1522
		1523	SV *
		1524	_get_state ()
		1525	CODE:
		1526	{
		1527	struct io_state *data;
		1528
		1529	RETVAL = newSV (sizeof (struct io_state));
		1530	data = (struct io_state *)SvPVX (RETVAL);
		1531	SvCUR_set (RETVAL, sizeof (struct io_state));
		1532	SvPOK_only (RETVAL);
		1533
		1534	data->errorno = errno;
		1535	data->laststype = PL_laststype;
		1536	data->laststatval = PL_laststatval;
		1537	data->statcache = PL_statcache;
		1538	}
		1539	OUTPUT:
		1540	RETVAL
		1541
1131	void	1542	void
1132	schedule(...)	1543	_set_state (char *data_)
1133	PROTOTYPE:	1544	PROTOTYPE: $
1134	CODE:	1545	CODE:
1135	api_schedule ();	1546	{
		1547	struct io_state *data = (void *)data_;
1136		1548
1137	void	1549	errno = data->errorno;
1138	cede(...)	1550	PL_laststype = data->laststype;
1139	PROTOTYPE:	1551	PL_laststatval = data->laststatval;
1140	CODE:	1552	PL_statcache = data->statcache;
1141	api_cede ();	1553	}
1142		1554

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