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Comparing Coro/Coro/State.xs (file contents):
Revision 1.51 by pcg, Sun Nov 30 17:03:48 2003 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#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)
8	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
10	# endif	57	# endif
11	# ifndef call_sv	58	# ifndef call_sv
12	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
25	# endif	72	# endif
26	#endif	73	#endif
27		74
28	#include "libcoro/coro.c"	75	/* 5.8.7 */
29		76	#ifndef SvRV_set
30	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	78	#endif
42	#endif
43		79
44	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
45	#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
46		92
47	/* 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
48	* 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
49	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
51		98
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		100
54	#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))
55		110
56	#include "CoroAPI.h"	111	#include "CoroAPI.h"
57		112
		113	#ifdef USE_ITHREADS
		114	static perl_mutex coro_mutex;
		115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		117	#else
		118	# define LOCK (void)0
		119	# define UNLOCK (void)0
		120	#endif
		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
58	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
		133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
		135	static HV *coro_state_stash, *coro_stash;
		136	static SV *coro_mortal; /* will be freed after next transfer */
59		137
60	/* 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 */
61	typedef struct {	142	typedef struct coro_cctx {
62	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
63	int usecnt; /* shared by how many coroutines */
64	int gencnt; /* generation counter */
65		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;
66	coro_context cctx;	153	coro_context cctx;
67		154
68	void *sptr;	155	#if CORO_USE_VALGRIND
69	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
70	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
71		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 */
72	struct coro {	169	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	170	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;	171	coro_cctx *cctx;
75
76	/* the optional C context */
77	coro_stack *stack;
78	void *cursp;
79	int gencnt;
80
81	/* optionally saved, might be zero */
82	AV *defav;
83	SV *defsv;
84	SV *errsv;
85
86	/* saved global state not related to stacks */
87	U8 dowarn;
88	I32 in_eval;
89
90	/* the stacks and related info (callchain etc..) */
91	PERL_SI *curstackinfo;
92	AV *curstack;
93	AV *mainstack;
94	SV **stack_sp;
95	OP *op;
96	SV **curpad;
97	AV *comppad;
98	SV **stack_base;
99	SV **stack_max;
100	SV **tmps_stack;
101	I32 tmps_floor;
102	I32 tmps_ix;
103	I32 tmps_max;
104	I32 *markstack;
105	I32 *markstack_ptr;
106	I32 *markstack_max;
107	I32 *scopestack;
108	I32 scopestack_ix;
109	I32 scopestack_max;
110	ANY *savestack;
111	I32 savestack_ix;
112	I32 savestack_max;
113	OP **retstack;
114	I32 retstack_ix;
115	I32 retstack_max;
116	COP *curcop;
117	JMPENV *top_env;
118		172
119	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
120	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 */
121	};	197	};
122		198
123	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
125		201
126	static AV *main_mainstack; /* used to differentiate between $main and others */	202	/** Coro ********************************************************************/
127	static HV *coro_state_stash;
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV *coro_mortal; /* will be freed after next transfer */
132		203
133	/* mostly copied from op.c:cv_clone2 */	204	#define PRIO_MAX 3
134	STATIC AV *	205	#define PRIO_HIGH 1
135	clone_padlist (AV *protopadlist)	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 *coro_first;
		216
		217	/** lowlevel stuff **********************************************************/
		218
		219	static AV *
		220	coro_clone_padlist (pTHX_ CV *cv)
136	{	221	{
137	AV *av;	222	AV *padlist = CvPADLIST (cv);
138	I32 ix;
139	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
140	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
141	SV **pname = AvARRAY (protopad_name);
142	SV **ppad = AvARRAY (protopad);
143	I32 fname = AvFILLp (protopad_name);
144	I32 fpad = AvFILLp (protopad);
145	AV *newpadlist, *newpad_name, *newpad;	223	AV *newpadlist, *newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		224
156	newpadlist = newAV ();	225	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
158	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)));
159	av_store (newpadlist, 1, (SV *) newpad);	236	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char *name = SvPVX (namesv); /* XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV *kid = cv_clone((CV*)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225		237
226	return newpadlist;	238	return newpadlist;
227	}	239	}
228		240
229	STATIC void	241	static void
230	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
231	{	243	{
232	/* may be during global destruction */	244	/* may be during global destruction */
233	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
234	{	246	{
235	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
248		260
249	SvREFCNT_dec ((SV*)padlist);	261	SvREFCNT_dec ((SV*)padlist);
250	}	262	}
251	}	263	}
252		264
253	STATIC int	265	static int
254	coro_cv_free (SV *sv, MAGIC *mg)	266	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255	{	267	{
256	AV *padlist;	268	AV *padlist;
257	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
258		270
259	/* casting is fun. */	271	/* casting is fun. */
260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
		274
		275	SvREFCNT_dec (av);
		276
		277	return 0;
262	}	278	}
263		279
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		281
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		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
268	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
269	STATIC void	292	static void
270	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
271	{	294	{
272	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
273		297
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
275	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276	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
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		310	#endif
		311	}
278	}	312	}
279		313
280	STATIC void	314	static void
281	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
282	{	316	{
283	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
284		319
285	if (!mg)	320	if (!mg)
286	{	321	{
287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
290	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
291	}	326	}
292		327
293	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);
294	}	334	}
		335
		336	/** load & save, init *******************************************************/
295		337
296	#define SB do {	338	#define SB do {
297	#define SE } while (0)	339	#define SE } while (0)
298		340
299	#define LOAD(state) load_state(aTHX_ (state));
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
301
302	#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
303		342
304	static void	343	static void
305	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
306	{	345	{
307	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
308	PL_in_eval = c->in_eval;	347	# include "state.h"
309		348	#undef VAR
310	PL_curstackinfo = c->curstackinfo;
311	PL_curstack = c->curstack;
312	PL_mainstack = c->mainstack;
313	PL_stack_sp = c->stack_sp;
314	PL_op = c->op;
315	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;
317	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;
322	PL_tmps_max = c->tmps_max;
323	PL_markstack = c->markstack;
324	PL_markstack_ptr = c->markstack_ptr;
325	PL_markstack_max = c->markstack_max;
326	PL_scopestack = c->scopestack;
327	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;
332	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;
335	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337		349
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	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	}
341		369
342	{	370	{
343	dSP;	371	dSP;
344	CV *cv;	372	CV *cv;
345		373
346	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
347	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
348	{	376	{
349	AV *padlist = (AV *)POPs;
350
351	if (padlist)
352	{
353	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
355	#ifdef USE_THREADS	379	CvPADLIST (cv) = (AV *)POPs;
356	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357	#endif
358	}
359
360	++CvDEPTH(cv);
361	}	380	}
362		381
363	PUTBACK;	382	PUTBACK;
364	}	383	}
365	}	384	}
366		385
367	static void	386	static void
368	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
369	{	388	{
370	{	389	{
371	dSP;	390	dSP;
372	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
376	/*	395	/*
377	* 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
378	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
379	*/	398	*/
380		399
381	PUSHs (Nullsv);	400	XPUSHs (Nullsv);
382	/* this loop was inspired by pp_caller */	401	/* this loop was inspired by pp_caller */
383	for (;;)	402	for (;;)
384	{	403	{
385	while (cxix >= 0)	404	while (cxix >= 0)
386	{	405	{
387	PERL_CONTEXT *cx = &ccstk[cxix--];	406	PERL_CONTEXT *cx = &ccstk[cxix--];
388		407
389	if (CxTYPE(cx) == CXt_SUB)	408	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
390	{	409	{
391	CV *cv = cx->blk_sub.cv;	410	CV *cv = cx->blk_sub.cv;
		411
392	if (CvDEPTH(cv))	412	if (CvDEPTH (cv))
393	{	413	{
394	#ifdef USE_THREADS
395	/*XPUSHs ((SV *)CvOWNER(cv));*/
396	/*CvOWNER(cv) = 0;*/
397	/*error must unlock this cv etc.. etc...*/
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	414	EXTEND (SP, 3);
400
401	while (--CvDEPTH(cv))
402	{
403	/* this tells the restore code to increment CvDEPTH */
404	PUSHs (Nullsv);
405	PUSHs ((SV *)cv);
406	}
407
408	PUSHs ((SV *)CvPADLIST(cv));	415	PUSHs ((SV *)CvPADLIST (cv));
		416	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
409	PUSHs ((SV *)cv);	417	PUSHs ((SV *)cv);
410		418
411	get_padlist (cv); /* this is a monster */	419	CvDEPTH (cv) = 0;
		420	get_padlist (aTHX_ cv);
412	}	421	}
413	}	422	}
414	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)
416	{
417	/* I never used formats, so how should I know how these are implemented? */
418	/* my bold guess is as a simple, plain sub... */
419	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420	}
421	#endif
422	}	423	}
423		424
424	if (top_si->si_type == PERLSI_MAIN)	425	if (top_si->si_type == PERLSI_MAIN)
425	break;	426	break;
426		427
…		…
430	}	431	}
431		432
432	PUTBACK;	433	PUTBACK;
433	}	434	}
434		435
435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	436	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	437	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	438	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		439	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		440	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
438		441
439	c->dowarn = PL_dowarn;	442	#define VAR(name,type)c->name = PL_ ## name;
440	c->in_eval = PL_in_eval;	443	# include "state.h"
441		444	#undef VAR
442	c->curstackinfo = PL_curstackinfo;
443	c->curstack = PL_curstack;
444	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;
446	c->op = PL_op;
447	c->curpad = PL_curpad;
448	c->comppad = PL_comppad;
449	c->stack_base = PL_stack_base;
450	c->stack_max = PL_stack_max;
451	c->tmps_stack = PL_tmps_stack;
452	c->tmps_floor = PL_tmps_floor;
453	c->tmps_ix = PL_tmps_ix;
454	c->tmps_max = PL_tmps_max;
455	c->markstack = PL_markstack;
456	c->markstack_ptr = PL_markstack_ptr;
457	c->markstack_max = PL_markstack_max;
458	c->scopestack = PL_scopestack;
459	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;
464	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;
467	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	445	}
470		446
471	/*	447	/*
472	* allocate various perl stacks. This is an exact copy	448	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	449	* of perl.c:init_stacks, except that it uses less memory
474	* on the assumption that coroutines do not usually need	450	* on the (sometimes correct) assumption that coroutines do
475	* a lot of stackspace.	451	* not usually need a lot of stackspace.
476	*/	452	*/
477	STATIC void	453	#if CORO_PREFER_PERL_FUNCTIONS
		454	# define coro_init_stacks init_stacks
		455	#else
		456	static void
478	coro_init_stacks (pTHX)	457	coro_init_stacks (pTHX)
479	{	458	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	459	PL_curstackinfo = new_stackinfo(64, 6);
481	PL_curstackinfo->si_type = PERLSI_MAIN;	460	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	461	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	462	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484		463
485	PL_stack_base = AvARRAY(PL_curstack);	464	PL_stack_base = AvARRAY(PL_curstack);
486	PL_stack_sp = PL_stack_base;	465	PL_stack_sp = PL_stack_base;
487	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	466	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488		467
489	New(50,PL_tmps_stack,96,SV*);	468	New(50,PL_tmps_stack,64,SV*);
490	PL_tmps_floor = -1;	469	PL_tmps_floor = -1;
491	PL_tmps_ix = -1;	470	PL_tmps_ix = -1;
492	PL_tmps_max = 96;	471	PL_tmps_max = 64;
493		472
494	New(54,PL_markstack,16,I32);	473	New(54,PL_markstack,16,I32);
495	PL_markstack_ptr = PL_markstack;	474	PL_markstack_ptr = PL_markstack;
496	PL_markstack_max = PL_markstack + 16;	475	PL_markstack_max = PL_markstack + 16;
497		476
…		…
501		480
502	New(54,PL_scopestack,16,I32);	481	New(54,PL_scopestack,16,I32);
503	PL_scopestack_ix = 0;	482	PL_scopestack_ix = 0;
504	PL_scopestack_max = 16;	483	PL_scopestack_max = 16;
505		484
506	New(54,PL_savestack,96,ANY);	485	New(54,PL_savestack,64,ANY);
507	PL_savestack_ix = 0;	486	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	487	PL_savestack_max = 64;
509		488
		489	#if !PERL_VERSION_ATLEAST (5,9,0)
510	New(54,PL_retstack,8,OP*);	490	New(54,PL_retstack,4,OP*);
511	PL_retstack_ix = 0;	491	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	492	PL_retstack_max = 4;
		493	#endif
513	}	494	}
		495	#endif
514		496
515	/*	497	/*
516	* destroy the stacks, the callchain etc...	498	* destroy the stacks, the callchain etc...
517	*/	499	*/
518	STATIC void	500	static void
519	destroy_stacks(pTHX)	501	coro_destroy_stacks (pTHX)
520	{	502	{
521	if (!IN_DESTRUCT)	503	if (!IN_DESTRUCT)
522	{	504	{
523	/* is this ugly, I ask? */	505	/* restore all saved variables and stuff */
524	while (PL_scopestack_ix)	506	LEAVE_SCOPE (0);
525	LEAVE;	507	assert (PL_tmps_floor == -1);
526		508
527	/* sure it is, but more important: is it correct?? :/ */	509	/* free all temporaries */
528	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
529	FREETMPS;	510	FREETMPS;
		511	assert (PL_tmps_ix == -1);
		512
		513	/* unwind all extra stacks */
		514	POPSTACK_TO (PL_mainstack);
		515
		516	/* unwind main stack */
		517	dounwind (-1);
530	}	518	}
531		519
532	while (PL_curstackinfo->si_next)	520	while (PL_curstackinfo->si_next)
533	PL_curstackinfo = PL_curstackinfo->si_next;	521	PL_curstackinfo = PL_curstackinfo->si_next;
534		522
535	while (PL_curstackinfo)	523	while (PL_curstackinfo)
536	{	524	{
537	PERL_SI *p = PL_curstackinfo->si_prev;	525	PERL_SI *p = PL_curstackinfo->si_prev;
538		526
539	{
540	dSP;
541	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
542	PUTBACK; /* possibly superfluous */
543	}
544
545	if (!IN_DESTRUCT)	527	if (!IN_DESTRUCT)
546	{
547	dounwind(-1);
548	SvREFCNT_dec(PL_curstackinfo->si_stack);	528	SvREFCNT_dec (PL_curstackinfo->si_stack);
549	}
550		529
551	Safefree(PL_curstackinfo->si_cxstack);	530	Safefree (PL_curstackinfo->si_cxstack);
552	Safefree(PL_curstackinfo);	531	Safefree (PL_curstackinfo);
553	PL_curstackinfo = p;	532	PL_curstackinfo = p;
554	}	533	}
555		534
556	Safefree(PL_tmps_stack);	535	Safefree (PL_tmps_stack);
557	Safefree(PL_markstack);	536	Safefree (PL_markstack);
558	Safefree(PL_scopestack);	537	Safefree (PL_scopestack);
559	Safefree(PL_savestack);	538	Safefree (PL_savestack);
		539	#if !PERL_VERSION_ATLEAST (5,9,0)
560	Safefree(PL_retstack);	540	Safefree (PL_retstack);
561	}
562
563	static void
564	allocate_stack (Coro__State ctx, int alloc)
565	{
566	coro_stack *stack;
567
568	New (0, stack, 1, coro_stack);
569
570	stack->refcnt = 1;
571	stack->usecnt = 1;
572	stack->gencnt = ctx->gencnt = 0;
573	if (alloc)
574	{
575	#if HAVE_MMAP
576	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
577	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
578	if (stack->sptr == (void *)-1)
579	#endif	541	#endif
		542	}
		543
		544	static size_t
		545	coro_rss (struct coro *coro)
		546	{
		547	size_t rss = sizeof (coro);
		548
		549	if (coro->mainstack)
		550	{
		551	if (coro->flags & CF_RUNNING)
580	{	552	{
581	/*FIXME*//*D*//* reasonable stack size! */	553	#define VAR(name,type)coro->name = PL_ ## name;
582	stack->ssize = - (16384 * sizeof (long));	554	# include "state.h"
583	New (0, stack->sptr, 16384, long);	555	#undef VAR
584	}	556	}
585	}
586	else
587	stack->sptr = 0;
588		557
589	ctx->stack = stack;	558	rss += sizeof (coro->curstackinfo);
590	}	559	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		560	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		561	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		562	rss += coro->tmps_max * sizeof (SV *);
		563	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		564	rss += coro->scopestack_max * sizeof (I32);
		565	rss += coro->savestack_max * sizeof (ANY);
591		566
592	static void	567	#if !PERL_VERSION_ATLEAST (5,9,0)
593	deallocate_stack (Coro__State ctx)	568	rss += coro->retstack_max * sizeof (OP *);
594	{	569	#endif
595	coro_stack *stack = ctx->stack;
596
597	ctx->stack = 0;
598
599	if (stack)
600	{	570	}
601	if (!--stack->refcnt)
602	{
603	#ifdef HAVE_MMAP
604	if (stack->ssize > 0 && stack->sptr)
605	munmap (stack->sptr, stack->ssize);
606	else
607	#endif
608	Safefree (stack->sptr);
609		571
610	Safefree (stack);	572	return rss;
611	}
612	else if (ctx->gencnt == stack->gencnt)
613	--stack->usecnt;
614	}
615	}	573	}
616		574
		575	/** coroutine stack handling ************************************************/
		576
617	static void	577	static void
618	setup_coro (void *arg)	578	setup_coro (pTHX_ struct coro *coro)
619	{	579	{
620	/*	580	/*
621	* emulate part of the perl startup here.	581	* emulate part of the perl startup here.
622	*/	582	*/
		583	coro_init_stacks (aTHX);
		584
		585	PL_curcop = &PL_compiling;
		586	PL_in_eval = EVAL_NULL;
		587	PL_comppad = 0;
		588	PL_curpm = 0;
		589	PL_localizing = 0;
		590	PL_dirty = 0;
		591	PL_restartop = 0;
		592
		593	{
		594	dSP;
		595	LOGOP myop;
		596
		597	SvREFCNT_dec (GvAV (PL_defgv));
		598	GvAV (PL_defgv) = coro->args; coro->args = 0;
		599
		600	Zero (&myop, 1, LOGOP);
		601	myop.op_next = Nullop;
		602	myop.op_flags = OPf_WANT_VOID;
		603
		604	PUSHMARK (SP);
		605	XPUSHs (av_shift (GvAV (PL_defgv)));
		606	PUTBACK;
		607	PL_op = (OP *)&myop;
		608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		609	SPAGAIN;
		610	}
		611
		612	ENTER; /* necessary e.g. for dounwind */
		613	}
		614
		615	static void
		616	free_coro_mortal (pTHX)
		617	{
		618	if (coro_mortal)
		619	{
		620	SvREFCNT_dec (coro_mortal);
		621	coro_mortal = 0;
		622	}
		623	}
		624
		625	/* inject a fake call to Coro::State::_cctx_init into the execution */
		626	/* _cctx_init should be careful, as it could be called at almost any time */
		627	/* during execution of a perl program */
		628	static void NOINLINE
		629	prepare_cctx (pTHX_ coro_cctx *cctx)
		630	{
623	dSP;	631	dSP;
624	Coro__State ctx = (Coro__State)arg;	632	LOGOP myop;
625	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
626		633
627	coro_init_stacks (aTHX);	634	Zero (&myop, 1, LOGOP);
628	/*PL_curcop = 0;*/	635	myop.op_next = PL_op;
629	/*PL_in_eval = PL_in_eval;*/ /* inherit */	636	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
630	SvREFCNT_dec (GvAV (PL_defgv));
631	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
632		637
		638	PUSHMARK (SP);
		639	EXTEND (SP, 2);
		640	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		641	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		642	PUTBACK;
		643	PL_op = (OP *)&myop;
		644	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
633	SPAGAIN;	645	SPAGAIN;
		646	}
634		647
635	if (ctx->stack)	648	/*
636	{	649	* this is a _very_ stripped down perl interpreter ;)
637	ctx->cursp = 0;	650	*/
		651	static void
		652	coro_run (void *arg)
		653	{
		654	dTHX;
638		655
639	PUSHMARK(SP);	656	/* coro_run is the alternative tail of transfer(), so unlock here. */
640	PUTBACK;	657	UNLOCK;
641	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
642		658
643	if (SvTRUE (ERRSV))	659	PL_top_env = &PL_start_env;
644	croak (NULL);	660
645	else	661	/* inject a fake subroutine call to cctx_init */
646	croak ("FATAL: CCTXT coroutine returned!");	662	prepare_cctx (aTHX_ (coro_cctx *)arg);
		663
		664	/* somebody or something will hit me for both perl_run and PL_restartop */
		665	PL_restartop = PL_op;
		666	perl_run (PL_curinterp);
		667
		668	/*
		669	* If perl-run returns we assume exit() was being called or the coro
		670	* fell off the end, which seems to be the only valid (non-bug)
		671	* reason for perl_run to return. We try to exit by jumping to the
		672	* bootstrap-time "top" top_env, as we cannot restore the "main"
		673	* coroutine as Coro has no such concept
		674	*/
		675	PL_top_env = main_top_env;
		676	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		677	}
		678
		679	static coro_cctx *
		680	cctx_new ()
		681	{
		682	coro_cctx *cctx;
		683	void *stack_start;
		684	size_t stack_size;
		685
		686	++cctx_count;
		687
		688	Newz (0, cctx, 1, coro_cctx);
		689
		690	#if HAVE_MMAP
		691
		692	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		693	/* mmap supposedly does allocate-on-write for us */
		694	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		695
		696	if (cctx->sptr != (void *)-1)
		697	{
		698	# if CORO_STACKGUARD
		699	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		700	# endif
		701	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		702	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		703	cctx->mapped = 1;
647	}	704	}
648	else	705	else
649	{	706	#endif
650	UNOP myop;
651
652	PL_op = (OP *)&myop;
653
654	Zero(&myop, 1, UNOP);
655	myop.op_next = Nullop;
656	myop.op_flags = OPf_WANT_VOID;
657
658	PUSHMARK(SP);
659	XPUSHs (sub_init);
660	/*
661	* the next line is slightly wrong, as PL_op->op_next
662	* is actually being executed so we skip the first op.
663	* that doesn't matter, though, since it is only
664	* pp_nextstate and we never return...
665	* ah yes, and I don't care anyways ;)
666	*/
667	PUTBACK;
668	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
669	SPAGAIN;
670
671	ENTER; /* necessary e.g. for dounwind */
672	}	707	{
673	}	708	cctx->ssize = coro_stacksize * (long)sizeof (long);
		709	New (0, cctx->sptr, coro_stacksize, long);
674		710
675	static void	711	if (!cctx->sptr)
676	continue_coro (void *arg)	712	{
677	{	713	perror ("FATAL: unable to allocate stack for coroutine");
678	/*	714	_exit (EXIT_FAILURE);
679	* this is a _very_ stripped down perl interpreter ;)	715	}
680	*/
681	Coro__State ctx = (Coro__State)arg;
682	JMPENV coro_start_env;
683		716
684	PL_top_env = &ctx->start_env;	717	stack_start = cctx->sptr;
		718	stack_size = cctx->ssize;
		719	}
685		720
686	ctx->cursp = 0;	721	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		722	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		723
		724	return cctx;
		725	}
		726
		727	static void
		728	cctx_destroy (coro_cctx *cctx)
		729	{
		730	if (!cctx)
		731	return;
		732
		733	--cctx_count;
		734
		735	#if CORO_USE_VALGRIND
		736	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		737	#endif
		738
		739	#if HAVE_MMAP
		740	if (cctx->mapped)
		741	munmap (cctx->sptr, cctx->ssize);
		742	else
		743	#endif
		744	Safefree (cctx->sptr);
		745
		746	Safefree (cctx);
		747	}
		748
		749	static coro_cctx *
		750	cctx_get (pTHX)
		751	{
		752	while (cctx_first)
		753	{
		754	coro_cctx *cctx = cctx_first;
		755	cctx_first = cctx->next;
		756	--cctx_idle;
		757
		758	if (cctx->ssize >= coro_stacksize)
		759	return cctx;
		760
		761	cctx_destroy (cctx);
		762	}
		763
687	PL_op = PL_op->op_next;	764	PL_op = PL_op->op_next;
688	CALLRUNOPS(aTHX);	765	return cctx_new ();
689
690	abort ();
691	}	766	}
692		767
693	STATIC void	768	static void
		769	cctx_put (coro_cctx *cctx)
		770	{
		771	/* free another cctx if overlimit */
		772	if (cctx_idle >= MAX_IDLE_CCTX)
		773	{
		774	coro_cctx *first = cctx_first;
		775	cctx_first = first->next;
		776	--cctx_idle;
		777
		778	assert (!first->inuse);
		779	cctx_destroy (first);
		780	}
		781
		782	++cctx_idle;
		783	cctx->next = cctx_first;
		784	cctx_first = cctx;
		785	}
		786
		787	/** coroutine switching *****************************************************/
		788
		789	/* never call directly, always through the coro_state_transfer global variable */
		790	static void NOINLINE
694	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	791	transfer (pTHX_ struct coro *prev, struct coro *next)
695	{	792	{
696	dSTACKLEVEL;	793	dSTACKLEVEL;
697	static struct coro *xnext;
698		794
		795	/* sometimes transfer is only called to set idle_sp */
		796	if (!next)
		797	{
		798	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		799	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		800	}
699	if (prev != next)	801	else if (prev != next)
700	{	802	{
701	xnext = next;	803	coro_cctx *prev__cctx;
702		804
703	if (next->mainstack)	805	if (prev->flags & CF_NEW)
704	{	806	{
705	SAVE (prev, flags);	807	/* create a new empty context */
706	LOAD (next);	808	Newz (0, prev->cctx, 1, coro_cctx);
707		809	prev->cctx->inuse = 1;
708	/* mark this state as in-use */	810	prev->flags &= ~CF_NEW;
709	next->mainstack = 0;	811	prev->flags |= CF_RUNNING;
710	next->tmps_ix = -2;
711
712	/* stacklevel changed? if yes, grab the stack for us! */
713	if (flags & TRANSFER_SAVE_CCTXT)
714	{
715	if (!prev->stack)
716	allocate_stack (prev, 0);
717	else if (prev->cursp != stacklevel
718	&& prev->stack->usecnt > 1)
719	{
720	prev->gencnt = ++prev->stack->gencnt;
721	prev->stack->usecnt = 1;
722	}
723
724	/* has our stack been invalidated? */
725	if (next->stack && next->stack->gencnt != next->gencnt)
726	{
727	deallocate_stack (next);
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	continue_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	}
733
734	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
735	/* don't add any code here */
736	}
737
738	}	812	}
739	else if (next->tmps_ix == -2)	813
740	croak ("tried to transfer to running coroutine");	814	/*TODO: must not croak here */
		815	if (!prev->flags & CF_RUNNING)
		816	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		817
		818	if (next->flags & CF_RUNNING)
		819	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		820
		821	if (next->flags & CF_DESTROYED)
		822	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		823
		824	prev->flags &= ~CF_RUNNING;
		825	next->flags |= CF_RUNNING;
		826
		827	LOCK;
		828
		829	if (next->flags & CF_NEW)
		830	{
		831	/* need to start coroutine */
		832	next->flags &= ~CF_NEW;
		833	/* first get rid of the old state */
		834	save_perl (aTHX_ prev);
		835	/* setup coroutine call */
		836	setup_coro (aTHX_ next);
		837	/* need a new stack */
		838	assert (!next->cctx);
		839	}
741	else	840	else
742	{	841	{
743	SAVE (prev, -1); /* first get rid of the old state */	842	/* coroutine already started */
744		843	save_perl (aTHX_ prev);
745	if (flags & TRANSFER_SAVE_CCTXT)	844	load_perl (aTHX_ next);
746	{
747	if (!prev->stack)
748	allocate_stack (prev, 0);
749
750	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
751	{
752	PL_top_env = &next->start_env;
753
754	setup_coro (next);
755
756	prev->stack->refcnt++;
757	prev->stack->usecnt++;
758	next->stack = prev->stack;
759	next->gencnt = prev->gencnt;
760	}
761	else
762	{
763	assert (!next->stack);
764	allocate_stack (next, 1);
765	coro_create (&(next->stack->cctx),
766	setup_coro, (void *)next,
767	next->stack->sptr, labs (next->stack->ssize));
768	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
769	/* don't add any code here */
770	}
771	}
772	else
773	setup_coro (next);
774	}	845	}
775		846
776	/*	847	prev__cctx = prev->cctx;
777	* xnext is now either prev or next, depending on wether	848
778	* we switched the c stack or not. that's why I use a global	849	/* possibly "free" the cctx */
779	* variable, that should become thread-specific at one point.	850	if (prev__cctx->idle_sp == STACKLEVEL)
780	*/	851	{
781	xnext->cursp = stacklevel;	852	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
782	}	853	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
783		854
784	if (coro_mortal)	855	prev->cctx = 0;
		856
		857	cctx_put (prev__cctx);
		858	prev__cctx->inuse = 0;
		859	}
		860
		861	if (!next->cctx)
		862	{
		863	next->cctx = cctx_get (aTHX);
		864	assert (!next->cctx->inuse);
		865	next->cctx->inuse = 1;
		866	}
		867
		868	if (prev__cctx != next->cctx)
		869	{
		870	prev__cctx->top_env = PL_top_env;
		871	PL_top_env = next->cctx->top_env;
		872	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		873	}
		874
		875	free_coro_mortal (aTHX);
		876	UNLOCK;
785	{	877	}
786	SvREFCNT_dec (coro_mortal);	878	}
787	coro_mortal = 0;	879
		880	struct transfer_args
		881	{
		882	struct coro *prev, *next;
		883	};
		884
		885	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		886
		887	/** high level stuff ********************************************************/
		888
		889	static int
		890	coro_state_destroy (pTHX_ struct coro *coro)
		891	{
		892	if (coro->flags & CF_DESTROYED)
		893	return 0;
		894
		895	coro->flags |= CF_DESTROYED;
		896
		897	if (coro->flags & CF_READY)
788	}	898	{
789	}	899	/* reduce nready, as destroying a ready coro effectively unreadies it */
		900	/* alternative: look through all ready queues and remove the coro */
		901	LOCK;
		902	--coro_nready;
		903	UNLOCK;
		904	}
		905	else
		906	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		907
791	#define SV_CORO(sv,func) \	908	if (coro->mainstack && coro->mainstack != main_mainstack)
792	do { \	909	{
793	if (SvROK (sv)) \	910	struct coro temp;
794	sv = SvRV (sv); \
795	\
796	if (SvTYPE(sv) == SVt_PVHV) \
797	{ \
798	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
799	\
800	if (!he) \
801	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
802	\
803	(sv) = SvRV (HeVAL(he)); \
804	} \
805	\
806	/* must also be changed inside Coro::Cont::yield */ \
807	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
808	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
809	\
810	} while(0)
811		911
812	#define SvSTATE(sv) (struct coro *)SvIV (sv)	912	assert (!(coro->flags & CF_RUNNING));
813		913
		914	Zero (&temp, 1, struct coro);
		915	temp.save = CORO_SAVE_ALL;
		916
		917	if (coro->flags & CF_RUNNING)
		918	croak ("FATAL: tried to destroy currently running coroutine");
		919
		920	save_perl (aTHX_ &temp);
		921	load_perl (aTHX_ coro);
		922
		923	coro_destroy_stacks (aTHX);
		924
		925	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		926
		927	coro->mainstack = 0;
		928	}
		929
		930	cctx_destroy (coro->cctx);
		931	SvREFCNT_dec (coro->args);
		932
		933	if (coro->next) coro->next->prev = coro->prev;
		934	if (coro->prev) coro->prev->next = coro->next;
		935	if (coro == coro_first) coro_first = coro->next;
		936
		937	return 1;
		938	}
		939
814	static void	940	static int
		941	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		942	{
		943	struct coro *coro = (struct coro *)mg->mg_ptr;
		944	mg->mg_ptr = 0;
		945
		946	coro->hv = 0;
		947
		948	if (--coro->refcnt < 0)
		949	{
		950	coro_state_destroy (aTHX_ coro);
		951	Safefree (coro);
		952	}
		953
		954	return 0;
		955	}
		956
		957	static int
		958	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		959	{
		960	struct coro *coro = (struct coro *)mg->mg_ptr;
		961
		962	++coro->refcnt;
		963
		964	return 0;
		965	}
		966
		967	static MGVTBL coro_state_vtbl = {
		968	0, 0, 0, 0,
		969	coro_state_free,
		970	0,
		971	#ifdef MGf_DUP
		972	coro_state_dup,
		973	#else
		974	# define MGf_DUP 0
		975	#endif
		976	};
		977
		978	static struct coro *
		979	SvSTATE_ (pTHX_ SV *coro)
		980	{
		981	HV *stash;
		982	MAGIC *mg;
		983
		984	if (SvROK (coro))
		985	coro = SvRV (coro);
		986
		987	stash = SvSTASH (coro);
		988	if (stash != coro_stash && stash != coro_state_stash)
		989	{
		990	/* very slow, but rare, check */
		991	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		992	croak ("Coro::State object required");
		993	}
		994
		995	mg = CORO_MAGIC (coro);
		996	return (struct coro *)mg->mg_ptr;
		997	}
		998
		999	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1000
		1001	static void
		1002	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1003	{
		1004	ta->prev = SvSTATE (prev_sv);
		1005	ta->next = SvSTATE (next_sv);
		1006	}
		1007
		1008	static void
815	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1009	api_transfer (SV *prev_sv, SV *next_sv)
816	{	1010	{
817	SV_CORO (prev, "Coro::transfer");	1011	dTHX;
818	SV_CORO (next, "Coro::transfer");	1012	struct transfer_args ta;
819		1013
820	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1014	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1015	TRANSFER (ta);
		1016	}
		1017
		1018	static int
		1019	api_save (SV *coro_sv, int new_save)
		1020	{
		1021	dTHX;
		1022	struct coro *coro = SvSTATE (coro_sv);
		1023	int old_save = coro->save;
		1024
		1025	if (new_save >= 0)
		1026	coro->save = new_save;
		1027
		1028	return old_save;
821	}	1029	}
822		1030
823	/** Coro ********************************************************************/	1031	/** Coro ********************************************************************/
824		1032
825	#define PRIO_MAX 3
826	#define PRIO_HIGH 1
827	#define PRIO_NORMAL 0
828	#define PRIO_LOW -1
829	#define PRIO_IDLE -3
830	#define PRIO_MIN -4
831
832	/* for Coro.pm */
833	static GV *coro_current, *coro_idle;
834	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
835	static int coro_nready;
836
837	static void	1033	static void
838	coro_enq (SV *sv)	1034	coro_enq (pTHX_ SV *coro_sv)
839	{	1035	{
840	if (SvTYPE (sv) == SVt_PVHV)
841	{
842	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
843	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
844
845	prio = prio > PRIO_MAX ? PRIO_MAX
846	: prio < PRIO_MIN ? PRIO_MIN
847	: prio;
848
849	av_push (coro_ready [prio - PRIO_MIN], sv);	1036	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
850	coro_nready++;
851
852	return;
853	}
854
855	croak ("Coro::ready tried to enqueue something that is not a coroutine");
856	}	1037	}
857		1038
858	static SV *	1039	static SV *
859	coro_deq (int min_prio)	1040	coro_deq (pTHX_ int min_prio)
860	{	1041	{
861	int prio = PRIO_MAX - PRIO_MIN;	1042	int prio = PRIO_MAX - PRIO_MIN;
862		1043
863	min_prio -= PRIO_MIN;	1044	min_prio -= PRIO_MIN;
864	if (min_prio < 0)	1045	if (min_prio < 0)
865	min_prio = 0;	1046	min_prio = 0;
866		1047
867	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1048	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
868	if (av_len (coro_ready[prio]) >= 0)	1049	if (AvFILLp (coro_ready [prio]) >= 0)
869	{
870	coro_nready--;
871	return av_shift (coro_ready[prio]);	1050	return av_shift (coro_ready [prio]);
872	}
873		1051
874	return 0;	1052	return 0;
875	}	1053	}
876		1054
877	static void	1055	static int
878	api_ready (SV *coro)	1056	api_ready (SV *coro_sv)
879	{	1057	{
		1058	dTHX;
		1059	struct coro *coro;
		1060
880	if (SvROK (coro))	1061	if (SvROK (coro_sv))
881	coro = SvRV (coro);	1062	coro_sv = SvRV (coro_sv);
882		1063
		1064	coro = SvSTATE (coro_sv);
		1065
		1066	if (coro->flags & CF_READY)
		1067	return 0;
		1068
		1069	coro->flags |= CF_READY;
		1070
		1071	LOCK;
883	coro_enq (SvREFCNT_inc (coro));	1072	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1073	++coro_nready;
		1074	UNLOCK;
		1075
		1076	return 1;
		1077	}
		1078
		1079	static int
		1080	api_is_ready (SV *coro_sv)
		1081	{
		1082	dTHX;
		1083	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1084	}
		1085
		1086	static void
		1087	prepare_schedule (pTHX_ struct transfer_args *ta)
		1088	{
		1089	SV *prev_sv, *next_sv;
		1090
		1091	for (;;)
		1092	{
		1093	LOCK;
		1094	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1095
		1096	/* nothing to schedule: call the idle handler */
		1097	if (!next_sv)
		1098	{
		1099	dSP;
		1100	UNLOCK;
		1101
		1102	ENTER;
		1103	SAVETMPS;
		1104
		1105	PUSHMARK (SP);
		1106	PUTBACK;
		1107	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1108
		1109	FREETMPS;
		1110	LEAVE;
		1111	continue;
		1112	}
		1113
		1114	ta->next = SvSTATE (next_sv);
		1115
		1116	/* cannot transfer to destroyed coros, skip and look for next */
		1117	if (ta->next->flags & CF_DESTROYED)
		1118	{
		1119	UNLOCK;
		1120	SvREFCNT_dec (next_sv);
		1121	/* coro_nready is already taken care of by destroy */
		1122	continue;
		1123	}
		1124
		1125	--coro_nready;
		1126	UNLOCK;
		1127	break;
		1128	}
		1129
		1130	/* free this only after the transfer */
		1131	prev_sv = SvRV (coro_current);
		1132	SvRV_set (coro_current, next_sv);
		1133	ta->prev = SvSTATE (prev_sv);
		1134
		1135	assert (ta->next->flags & CF_READY);
		1136	ta->next->flags &= ~CF_READY;
		1137
		1138	LOCK;
		1139	free_coro_mortal (aTHX);
		1140	coro_mortal = prev_sv;
		1141	UNLOCK;
		1142	}
		1143
		1144	static void
		1145	prepare_cede (pTHX_ struct transfer_args *ta)
		1146	{
		1147	api_ready (coro_current);
		1148	prepare_schedule (aTHX_ ta);
		1149	}
		1150
		1151	static int
		1152	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1153	{
		1154	if (coro_nready)
		1155	{
		1156	SV *prev = SvRV (coro_current);
		1157	prepare_schedule (aTHX_ ta);
		1158	api_ready (prev);
		1159	return 1;
		1160	}
		1161	else
		1162	return 0;
884	}	1163	}
885		1164
886	static void	1165	static void
887	api_schedule (void)	1166	api_schedule (void)
888	{	1167	{
889	SV *prev, *next;	1168	dTHX;
		1169	struct transfer_args ta;
890		1170
891	prev = SvRV (GvSV (coro_current));	1171	prepare_schedule (aTHX_ &ta);
892	next = coro_deq (PRIO_MIN);	1172	TRANSFER (ta);
893
894	if (!next)
895	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
896
897	/* free this only after the transfer */
898	coro_mortal = prev;
899	SV_CORO (prev, "Coro::schedule");
900
901	SvRV (GvSV (coro_current)) = next;
902
903	SV_CORO (next, "Coro::schedule");
904
905	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
906	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
907	}	1173	}
908		1174
909	static void	1175	static int
910	api_cede (void)	1176	api_cede (void)
911	{	1177	{
912	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1178	dTHX;
		1179	struct transfer_args ta;
913		1180
914	api_schedule ();	1181	prepare_cede (aTHX_ &ta);
		1182
		1183	if (ta.prev != ta.next)
		1184	{
		1185	TRANSFER (ta);
		1186	return 1;
		1187	}
		1188	else
		1189	return 0;
		1190	}
		1191
		1192	static int
		1193	api_cede_notself (void)
		1194	{
		1195	dTHX;
		1196	struct transfer_args ta;
		1197
		1198	if (prepare_cede_notself (aTHX_ &ta))
		1199	{
		1200	TRANSFER (ta);
		1201	return 1;
		1202	}
		1203	else
		1204	return 0;
915	}	1205	}
916		1206
917	MODULE = Coro::State PACKAGE = Coro::State	1207	MODULE = Coro::State PACKAGE = Coro::State
918		1208
919	PROTOTYPES: ENABLE	1209	PROTOTYPES: DISABLE
920		1210
921	BOOT:	1211	BOOT:
922	{ /* {} necessary for stoopid perl-5.6.x */	1212	{
923	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1213	#ifdef USE_ITHREADS
924	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1214	MUTEX_INIT (&coro_mutex);
		1215	#endif
		1216	BOOT_PAGESIZE;
		1217
925	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1218	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
926		1219
927	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
928	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
929	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
930	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
931		1226	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
932	if (!padlist_cache)
933	padlist_cache = newHV ();
934		1227
935	main_mainstack = PL_mainstack;	1228	main_mainstack = PL_mainstack;
		1229	main_top_env = PL_top_env;
		1230
		1231	while (main_top_env->je_prev)
		1232	main_top_env = main_top_env->je_prev;
936		1233
937	coroapi.ver = CORO_API_VERSION;	1234	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1235	coroapi.transfer = api_transfer;
939	}
940		1236
941	Coro::State	1237	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1238	}
943	SV * args	1239
944	PROTOTYPE: $	1240	SV *
		1241	new (char *klass, ...)
945	CODE:	1242	CODE:
946	Coro__State coro;	1243	{
		1244	struct coro *coro;
		1245	HV *hv;
		1246	int i;
947		1247
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1248	Newz (0, coro, 1, struct coro);
		1249	coro->args = newAV ();
		1250	coro->save = CORO_SAVE_DEF;
		1251	coro->flags = CF_NEW;
952		1252
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1253	if (coro_first) coro_first->prev = coro;
954	coro->mainstack = 0; /* actual work is done inside transfer */	1254	coro->next = coro_first;
955	coro->stack = 0;	1255	coro_first = coro;
956		1256
957	/* same as JMPENV_BOOTSTRAP */	1257	coro->hv = hv = newHV ();
958	/* we might be able to recycle start_env, but safe is safe */	1258	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
959	//Zero(&coro->start_env, 1, JMPENV);	1259	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962		1260
963	RETVAL = coro;	1261	for (i = 1; i < items; i++)
		1262	av_push (coro->args, newSVsv (ST (i)));
		1263	}
964	OUTPUT:	1264	OUTPUT:
965	RETVAL	1265	RETVAL
966		1266
		1267	int
		1268	save (SV *coro, int new_save = -1)
		1269	CODE:
		1270	RETVAL = api_save (coro, new_save);
		1271	OUTPUT:
		1272	RETVAL
		1273
		1274	int
		1275	save_also (SV *coro_sv, int save_also)
		1276	CODE:
		1277	{
		1278	struct coro *coro = SvSTATE (coro_sv);
		1279	RETVAL = coro->save;
		1280	coro->save |= save_also;
		1281	}
		1282	OUTPUT:
		1283	RETVAL
		1284
967	void	1285	void
968	transfer(prev, next, flags)	1286	_set_stacklevel (...)
969	SV *prev	1287	ALIAS:
970	SV *next	1288	Coro::State::transfer = 1
971	int flags	1289	Coro::schedule = 2
972	PROTOTYPE: @	1290	Coro::cede = 3
		1291	Coro::cede_notself = 4
973	CODE:	1292	CODE:
974	PUTBACK;	1293	{
975	SV_CORO (next, "Coro::transfer");	1294	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1295
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1296	switch (ix)
978	SPAGAIN;	1297	{
		1298	case 0:
		1299	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1300	ta.next = 0;
		1301	break;
		1302
		1303	case 1:
		1304	if (items != 2)
		1305	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1306
		1307	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1308	break;
		1309
		1310	case 2:
		1311	prepare_schedule (aTHX_ &ta);
		1312	break;
		1313
		1314	case 3:
		1315	prepare_cede (aTHX_ &ta);
		1316	break;
		1317
		1318	case 4:
		1319	if (!prepare_cede_notself (aTHX_ &ta))
		1320	XSRETURN_EMPTY;
		1321
		1322	break;
		1323	}
		1324
		1325	BARRIER;
		1326	TRANSFER (ta);
		1327
		1328	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1329	XSRETURN_YES;
		1330	}
		1331
		1332	bool
		1333	_destroy (SV *coro_sv)
		1334	CODE:
		1335	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1336	OUTPUT:
		1337	RETVAL
979		1338
980	void	1339	void
981	DESTROY(coro)
982	Coro::State coro
983	CODE:
984
985	if (coro->mainstack && coro->mainstack != main_mainstack)
986	{
987	struct coro temp;
988
989	PUTBACK;
990	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
991	LOAD(aTHX_ coro);
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005
1006	void
1007	_exit(code)	1340	_exit (code)
1008	int code	1341	int code
1009	PROTOTYPE: $	1342	PROTOTYPE: $
1010	CODE:	1343	CODE:
1011	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1012	_exit (code);	1344	_exit (code);
1013	#else
1014	signal (SIGTERM, SIG_DFL);
1015	raise (SIGTERM);
1016	exit (code);
1017	#endif
1018		1345
1019	MODULE = Coro::State PACKAGE = Coro::Cont	1346	int
		1347	cctx_stacksize (int new_stacksize = 0)
		1348	CODE:
		1349	RETVAL = coro_stacksize;
		1350	if (new_stacksize)
		1351	coro_stacksize = new_stacksize;
		1352	OUTPUT:
		1353	RETVAL
1020		1354
1021	# this is slightly dirty (should expose a c-level api)	1355	int
		1356	cctx_count ()
		1357	CODE:
		1358	RETVAL = cctx_count;
		1359	OUTPUT:
		1360	RETVAL
		1361
		1362	int
		1363	cctx_idle ()
		1364	CODE:
		1365	RETVAL = cctx_idle;
		1366	OUTPUT:
		1367	RETVAL
1022		1368
1023	void	1369	void
1024	yield(...)	1370	list ()
1025	PROTOTYPE: @	1371	PPCODE:
		1372	{
		1373	struct coro *coro;
		1374	for (coro = coro_first; coro; coro = coro->next)
		1375	if (coro->hv)
		1376	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1377	}
		1378
		1379	void
		1380	_eval (Coro::State coro, SV *coderef)
		1381	CODE:
		1382	{
		1383	if (coro->mainstack)
		1384	{
		1385	struct coro temp;
		1386	Zero (&temp, 1, struct coro);
		1387	temp.save = CORO_SAVE_ALL;
		1388
		1389	if (!(coro->flags & CF_RUNNING))
		1390	{
		1391	save_perl (aTHX_ &temp);
		1392	load_perl (aTHX_ coro);
		1393	}
		1394
		1395	{
		1396	dSP;
		1397	ENTER;
		1398	SAVETMPS;
		1399	PUSHMARK (SP);
		1400	PUTBACK;
		1401	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1402	SPAGAIN;
		1403	FREETMPS;
		1404	LEAVE;
		1405	PUTBACK;
		1406	}
		1407
		1408	if (!(coro->flags & CF_RUNNING))
		1409	{
		1410	save_perl (aTHX_ coro);
		1411	load_perl (aTHX_ &temp);
		1412	}
		1413	}
		1414	}
		1415
		1416	SV *
		1417	is_ready (Coro::State coro)
		1418	PROTOTYPE: $
		1419	ALIAS:
		1420	is_ready = CF_READY
		1421	is_running = CF_RUNNING
		1422	is_new = CF_NEW
		1423	is_destroyed = CF_DESTROYED
		1424	CODE:
		1425	RETVAL = boolSV (coro->flags & ix);
		1426	OUTPUT:
		1427	RETVAL
		1428
		1429	IV
		1430	rss (Coro::State coro)
		1431	PROTOTYPE: $
1026	CODE:	1432	CODE:
1027	static SV *returnstk;	1433	RETVAL = coro_rss (coro);
1028	SV *sv;	1434	OUTPUT:
1029	AV *defav = GvAV (PL_defgv);	1435	RETVAL
1030	struct coro *prev, *next;
1031		1436
1032	if (!returnstk)
1033	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1034
1035	/* set up @_ -- ugly */
1036	av_clear (defav);
1037	av_fill (defav, items - 1);
1038	while (items--)
1039	av_store (defav, items, SvREFCNT_inc (ST(items)));
1040
1041	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1042	sv = av_pop ((AV *)SvRV (returnstk));
1043	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1044	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1045	SvREFCNT_dec (sv);
1046
1047	transfer(aTHX_ prev, next, 0);
1048		1437
1049	MODULE = Coro::State PACKAGE = Coro	1438	MODULE = Coro::State PACKAGE = Coro
1050		1439
1051	# this is slightly dirty (should expose a c-level api)
1052
1053	BOOT:	1440	BOOT:
1054	{	1441	{
1055	int i;	1442	int i;
		1443
1056	HV *stash = gv_stashpv ("Coro", TRUE);	1444	coro_stash = gv_stashpv ("Coro", TRUE);
1057		1445
1058	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1446	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1059	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1447	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1060	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1448	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1061	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1449	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1062	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1450	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1063	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1451	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1064		1452
1065	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1453	coro_current = get_sv ("Coro::current", FALSE);
1066	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1454	SvREADONLY_on (coro_current);
1067		1455
1068	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1456	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1069	coro_ready[i] = newAV ();	1457	coro_ready[i] = newAV ();
1070		1458
1071	{	1459	{
1072	SV *sv = perl_get_sv("Coro::API", 1);	1460	SV *sv = perl_get_sv("Coro::API", 1);
1073		1461
1074	coroapi.schedule = api_schedule;	1462	coroapi.schedule = api_schedule;
		1463	coroapi.save = api_save;
1075	coroapi.cede = api_cede;	1464	coroapi.cede = api_cede;
		1465	coroapi.cede_notself = api_cede_notself;
1076	coroapi.ready = api_ready;	1466	coroapi.ready = api_ready;
		1467	coroapi.is_ready = api_is_ready;
1077	coroapi.nready = &coro_nready;	1468	coroapi.nready = &coro_nready;
1078	coroapi.current = coro_current;	1469	coroapi.current = coro_current;
1079		1470
1080	GCoroAPI = &coroapi;	1471	GCoroAPI = &coroapi;
1081	sv_setiv(sv, (IV)&coroapi);	1472	sv_setiv (sv, (IV)&coroapi);
1082	SvREADONLY_on(sv);	1473	SvREADONLY_on (sv);
1083	}	1474	}
1084	}	1475	}
1085		1476
1086	#if !PERL_MICRO
1087
1088	void	1477	void
1089	ready(self)	1478	_set_current (SV *current)
1090	SV * self
1091	PROTOTYPE: $	1479	PROTOTYPE: $
1092	CODE:	1480	CODE:
1093	api_ready (self);	1481	SvREFCNT_dec (SvRV (coro_current));
1094		1482	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1095	#endif
1096		1483
1097	int	1484	int
		1485	prio (Coro::State coro, int newprio = 0)
		1486	ALIAS:
		1487	nice = 1
		1488	CODE:
		1489	{
		1490	RETVAL = coro->prio;
		1491
		1492	if (items > 1)
		1493	{
		1494	if (ix)
		1495	newprio = coro->prio - newprio;
		1496
		1497	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1498	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1499
		1500	coro->prio = newprio;
		1501	}
		1502	}
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	SV *
		1507	ready (SV *self)
		1508	PROTOTYPE: $
		1509	CODE:
		1510	RETVAL = boolSV (api_ready (self));
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
1098	nready(...)	1515	nready (...)
1099	PROTOTYPE:	1516	PROTOTYPE:
1100	CODE:	1517	CODE:
1101	RETVAL = coro_nready;	1518	RETVAL = coro_nready;
1102	OUTPUT:	1519	OUTPUT:
1103	RETVAL	1520	RETVAL
1104		1521
		1522	MODULE = Coro::State PACKAGE = Coro::AIO
		1523
		1524	SV *
		1525	_get_state ()
		1526	CODE:
		1527	{
		1528	struct io_state *data;
		1529
		1530	RETVAL = newSV (sizeof (struct io_state));
		1531	data = (struct io_state *)SvPVX (RETVAL);
		1532	SvCUR_set (RETVAL, sizeof (struct io_state));
		1533	SvPOK_only (RETVAL);
		1534
		1535	data->errorno = errno;
		1536	data->laststype = PL_laststype;
		1537	data->laststatval = PL_laststatval;
		1538	data->statcache = PL_statcache;
		1539	}
		1540	OUTPUT:
		1541	RETVAL
		1542
1105	void	1543	void
1106	schedule(...)	1544	_set_state (char *data_)
1107	PROTOTYPE:	1545	PROTOTYPE: $
1108	CODE:	1546	CODE:
1109	api_schedule ();	1547	{
		1548	struct io_state *data = (void *)data_;
1110		1549
1111	void	1550	errno = data->errorno;
1112	cede(...)	1551	PL_laststype = data->laststype;
1113	PROTOTYPE:	1552	PL_laststatval = data->laststatval;
1114	CODE:	1553	PL_statcache = data->statcache;
1115	api_cede ();	1554	}
1116		1555

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