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Comparing Coro/Coro/State.xs (file contents):
Revision 1.34 by root, Fri Sep 14 15:40:56 2001 UTC vs.
Revision 1.161 by root, Sat Sep 22 22:59:31 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "libcoro/coro.c"	9	#include "patchlevel.h"
6		10
7	#include <signal.h>	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
8		14
9	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
10	# include <unistd.h>	16	# include <unistd.h>
11	# include <sys/mman.h>	17	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
15	# else	21	# else
16	# undef HAVE_MMAP	22	# undef HAVE_MMAP
17	# endif	23	# endif
18	# endif	24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
19	#endif	32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
20		37
21	#define MAY_FLUSH /* increases codesize and is rarely used */	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
22		44
23	#define SUB_INIT "Coro::State::initialize"	45	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	46	#define MAX_IDLE_CCTX 8
25		47
26	/* The next macro should declare a variable stacklevel that contains and approximation	48	#define PERL_VERSION_ATLEAST(a,b,c) \
27	* to the current C stack pointer. Its property is that it changes with each call	49	(PERL_REVISION > (a) \
28	* and should be unique. */	50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		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
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
		95	#define dSTACKLEVEL volatile char stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
30		97
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		99
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
34		109
35	#include "CoroAPI.h"	110	#include "CoroAPI.h"
36		111
		112	#ifdef USE_ITHREADS
		113	static perl_mutex coro_mutex;
		114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		116	#else
		117	# define LOCK (void)0
		118	# define UNLOCK (void)0
		119	#endif
		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
37	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
		132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
		134	static HV *coro_state_stash, *coro_stash;
		135	static SV *coro_mortal; /* will be freed after next transfer */
38		136
39	/* this is actually not only the c stack but also c registers etc... */	137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
		145	/* this is a structure representing a c-level coroutine */
40	typedef struct {	146	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	147	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		148
		149	/* the stack */
		150	void *sptr;
		151	size_t ssize;
		152
		153	/* cpu state */
		154	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		155	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		156	JMPENV *top_env;
45	coro_context cctx;	157	coro_context cctx;
46		158
47	void *sptr;	159	#if CORO_USE_VALGRIND
48	long ssize; /* positive == mmap, otherwise malloc */	160	int valgrind_id;
49	} coro_stack;	161	#endif
		162	char inuse, mapped;
		163	} coro_cctx;
50		164
		165	enum {
		166	CF_RUNNING = 0x0001, /* coroutine is running */
		167	CF_READY = 0x0002, /* coroutine is ready */
		168	CF_NEW = 0x0004, /* has never been switched to */
		169	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		170	};
		171
		172	/* this is a structure representing a perl-level coroutine */
51	struct coro {	173	struct coro {
52	/* the optional C context */	174	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	175	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56
57	/* optionally saved, might be zero */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	JMPENV *top_env;
93		176
94	/* data associated with this coroutine (initial args) */	177	/* data associated with this coroutine (initial args) */
95	AV *args;	178	AV *args;
		179	int refcnt;
		180	int save; /* CORO_SAVE flags */
		181	int flags; /* CF_ flags */
		182
		183	/* optionally saved, might be zero */
		184	AV *defav; /* @_ */
		185	SV *defsv; /* $_ */
		186	SV *errsv; /* $@ */
		187	GV *deffh; /* default filehandle */
		188	SV *irssv; /* $/ */
		189	SV *irssv_sv; /* real $/ cache */
		190
		191	#define VAR(name,type) type name;
		192	# include "state.h"
		193	#undef VAR
		194
		195	/* coro process data */
		196	int prio;
		197
		198	/* linked list */
		199	struct coro *next, *prev;
		200	HV *hv; /* the perl hash associated with this coro, if any */
96	};	201	};
97		202
98	typedef struct coro *Coro__State;	203	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	204	typedef struct coro *Coro__State_or_hashref;
100		205
101	static AV *main_mainstack; /* used to differentiate between $main and others */	206	/** Coro ********************************************************************/
102	static HV *coro_state_stash;
103	static SV *ucoro_state_sv;
104	static U32 ucoro_state_hash;
105	static HV *padlist_cache;
106		207
107	/* mostly copied from op.c:cv_clone2 */	208	#define PRIO_MAX 3
108	STATIC AV *	209	#define PRIO_HIGH 1
109	clone_padlist (AV *protopadlist)	210	#define PRIO_NORMAL 0
		211	#define PRIO_LOW -1
		212	#define PRIO_IDLE -3
		213	#define PRIO_MIN -4
		214
		215	/* for Coro.pm */
		216	static SV *coro_current;
		217	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		218	static int coro_nready;
		219	static struct coro *coro_first;
		220
		221	/** lowlevel stuff **********************************************************/
		222
		223	static AV *
		224	coro_clone_padlist (pTHX_ CV *cv)
110	{	225	{
111	AV *av;	226	AV *padlist = CvPADLIST (cv);
112	I32 ix;
113	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
114	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
115	SV **pname = AvARRAY (protopad_name);
116	SV **ppad = AvARRAY (protopad);
117	I32 fname = AvFILLp (protopad_name);
118	I32 fpad = AvFILLp (protopad);
119	AV *newpadlist, *newpad_name, *newpad;	227	AV *newpadlist, *newpad;
120	SV **npad;
121
122	newpad_name = newAV ();
123	for (ix = fname; ix >= 0; ix--)
124	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126	newpad = newAV ();
127	av_fill (newpad, AvFILLp (protopad));
128	npad = AvARRAY (newpad);
129		228
130	newpadlist = newAV ();	229	newpadlist = newAV ();
131	AvREAL_off (newpadlist);	230	AvREAL_off (newpadlist);
132	av_store (newpadlist, 0, (SV *) newpad_name);	231	#if PERL_VERSION_ATLEAST (5,9,0)
		232	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		233	#else
		234	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		235	#endif
		236	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		237	--AvFILLp (padlist);
		238
		239	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
133	av_store (newpadlist, 1, (SV *) newpad);	240	av_store (newpadlist, 1, (SV *)newpad);
134		241
135	av = newAV (); /* will be @_ */	242	return newpadlist;
136	av_extend (av, 0);	243	}
137	av_store (newpad, 0, (SV *) av);
138	AvFLAGS (av) = AVf_REIFY;
139		244
140	for (ix = fpad; ix > 0; ix--)	245	static void
		246	free_padlist (pTHX_ AV *padlist)
		247	{
		248	/* may be during global destruction */
		249	if (SvREFCNT (padlist))
141	{	250	{
142	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	251	I32 i = AvFILLp (padlist);
143	if (namesv && namesv != &PL_sv_undef)	252	while (i >= 0)
144	{	253	{
145	char *name = SvPVX (namesv); /* XXX */	254	SV **svp = av_fetch (padlist, i--, FALSE);
146	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	255	if (svp)
147	{ /* lexical from outside? */
148	npad[ix] = SvREFCNT_inc (ppad[ix]);
149	}	256	{
150	else
151	{ /* our own lexical */
152	SV *sv;	257	SV *sv;
153	if (*name == '&')	258	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
154	sv = SvREFCNT_inc (ppad[ix]);	259	SvREFCNT_dec (sv);
155	else if (*name == '@')	260
156	sv = (SV *) newAV ();	261	SvREFCNT_dec (*svp);
157	else if (*name == '%')
158	sv = (SV *) newHV ();
159	else
160	sv = NEWSV (0, 0);
161	if (!SvPADBUSY (sv))
162	SvPADMY_on (sv);
163	npad[ix] = sv;
164	}	262	}
165	}	263	}
166	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	264
		265	SvREFCNT_dec ((SV*)padlist);
		266	}
		267	}
		268
		269	static int
		270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		271	{
		272	AV *padlist;
		273	AV *av = (AV *)mg->mg_obj;
		274
		275	/* casting is fun. */
		276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		277	free_padlist (aTHX_ padlist);
		278
		279	SvREFCNT_dec (av);
		280
		281	return 0;
		282	}
		283
		284	#define PERL_MAGIC_coro PERL_MAGIC_ext
		285
		286	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		287
		288	#define CORO_MAGIC(cv) \
		289	SvMAGIC (cv) \
		290	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		291	? SvMAGIC (cv) \
		292	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		293	: 0
		294
		295	/* the next two functions merely cache the padlists */
		296	static void
		297	get_padlist (pTHX_ CV *cv)
		298	{
		299	MAGIC *mg = CORO_MAGIC (cv);
		300	AV *av;
		301
		302	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		303	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		304	else
		305	{
		306	#if CORO_PREFER_PERL_FUNCTIONS
		307	/* this is probably cleaner, but also slower? */
		308	CV *cp = Perl_cv_clone (cv);
		309	CvPADLIST (cv) = CvPADLIST (cp);
		310	CvPADLIST (cp) = 0;
		311	SvREFCNT_dec (cp);
		312	#else
		313	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		314	#endif
		315	}
		316	}
		317
		318	static void
		319	put_padlist (pTHX_ CV *cv)
		320	{
		321	MAGIC *mg = CORO_MAGIC (cv);
		322	AV *av;
		323
		324	if (!mg)
		325	{
		326	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		327	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		328	mg->mg_virtual = &vtbl_coro;
		329	mg->mg_obj = (SV *)newAV ();
		330	}
		331
		332	av = (AV *)mg->mg_obj;
		333
		334	if (AvFILLp (av) >= AvMAX (av))
		335	av_extend (av, AvMAX (av) + 1);
		336
		337	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		338	}
		339
		340	/** load & save, init *******************************************************/
		341
		342	#define SB do {
		343	#define SE } while (0)
		344
		345	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
		346
		347	static void
		348	load_perl (pTHX_ Coro__State c)
		349	{
		350	#define VAR(name,type) PL_ ## name = c->name;
		351	# include "state.h"
		352	#undef VAR
		353
		354	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		355	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		356	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		357	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		358
		359	if (c->irssv)
		360	{
		361	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
167	{	362	{
168	npad[ix] = SvREFCNT_inc (ppad[ix]);	363	SvREFCNT_dec (c->irssv);
		364	c->irssv = 0;
169	}	365	}
170	else	366	else
171	{	367	{
172	SV *sv = NEWSV (0, 0);	368	REPLACE_SV (PL_rs, c->irssv);
173	SvPADTMP_on (sv);	369	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
174	npad[ix] = sv;	370	sv_setsv (c->irssv_sv, PL_rs);
175	}	371	}
176	}	372	}
177
178	#if 0 /* return -ENOTUNDERSTOOD */
179	/* Now that vars are all in place, clone nested closures. */
180
181	for (ix = fpad; ix > 0; ix--) {
182	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
183	if (namesv
184	&& namesv != &PL_sv_undef
185	&& !(SvFLAGS(namesv) & SVf_FAKE)
186	&& *SvPVX(namesv) == '&'
187	&& CvCLONE(ppad[ix]))
188	{
189	CV *kid = cv_clone((CV*)ppad[ix]);
190	SvREFCNT_dec(ppad[ix]);
191	CvCLONE_on(kid);
192	SvPADMY_on(kid);
193	npad[ix] = (SV*)kid;
194	}
195	}
196	#endif
197
198	return newpadlist;
199	}
200
201	#ifdef MAY_FLUSH
202	STATIC void
203	free_padlist (AV *padlist)
204	{
205	/* may be during global destruction */
206	if (SvREFCNT(padlist))
207	{
208	I32 i = AvFILLp(padlist);
209	while (i >= 0)
210	{
211	SV **svp = av_fetch(padlist, i--, FALSE);
212	SV *sv = svp ? *svp : Nullsv;
213	if (sv)
214	SvREFCNT_dec(sv);
215	}
216
217	SvREFCNT_dec((SV*)padlist);
218	}
219	}
220	#endif
221
222	/* the next two functions merely cache the padlists */
223	STATIC void
224	get_padlist (CV *cv)
225	{
226	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228	if (he && AvFILLp ((AV *)*he) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230	else
231	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232	}
233
234	STATIC void
235	put_padlist (CV *cv)
236	{
237	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239	if (SvTYPE (*he) != SVt_PVAV)
240	{
241	SvREFCNT_dec (*he);
242	*he = (SV *)newAV ();
243	}
244
245	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
246	}
247
248	#ifdef MAY_FLUSH
249	STATIC void
250	flush_padlist_cache ()
251	{
252	HV *hv = padlist_cache;
253	padlist_cache = newHV ();
254
255	if (hv_iterinit (hv))
256	{
257	HE *he;
258	AV *padlist;
259
260	while (!!(he = hv_iternext (hv)))
261	{
262	AV *av = (AV *)HeVAL(he);
263
264	/* casting is fun. */
265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266	free_padlist (padlist);
267	}
268	}
269
270	SvREFCNT_dec (hv);
271	}
272	#endif
273
274	#define SB do {
275	#define SE } while (0)
276
277	#define LOAD(state) load_state(aTHX_ (state));
278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
279
280	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
281
282	static void
283	load_state(pTHX_ Coro__State c)
284	{
285	PL_dowarn = c->dowarn;
286	PL_in_eval = c->in_eval;
287
288	PL_curstackinfo = c->curstackinfo;
289	PL_curstack = c->curstack;
290	PL_mainstack = c->mainstack;
291	PL_stack_sp = c->stack_sp;
292	PL_op = c->op;
293	PL_curpad = c->curpad;
294	PL_stack_base = c->stack_base;
295	PL_stack_max = c->stack_max;
296	PL_tmps_stack = c->tmps_stack;
297	PL_tmps_floor = c->tmps_floor;
298	PL_tmps_ix = c->tmps_ix;
299	PL_tmps_max = c->tmps_max;
300	PL_markstack = c->markstack;
301	PL_markstack_ptr = c->markstack_ptr;
302	PL_markstack_max = c->markstack_max;
303	PL_scopestack = c->scopestack;
304	PL_scopestack_ix = c->scopestack_ix;
305	PL_scopestack_max = c->scopestack_max;
306	PL_savestack = c->savestack;
307	PL_savestack_ix = c->savestack_ix;
308	PL_savestack_max = c->savestack_max;
309	PL_retstack = c->retstack;
310	PL_retstack_ix = c->retstack_ix;
311	PL_retstack_max = c->retstack_max;
312	PL_curcop = c->curcop;
313	PL_top_env = c->top_env;
314
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318		373
319	{	374	{
320	dSP;	375	dSP;
321	CV *cv;	376	CV *cv;
322		377
323	/* now do the ugly restore mess */	378	/* now do the ugly restore mess */
324	while ((cv = (CV *)POPs))	379	while ((cv = (CV *)POPs))
325	{	380	{
326	AV *padlist = (AV *)POPs;
327
328	if (padlist)
329	{
330	put_padlist (cv); /* mark this padlist as available */	381	put_padlist (aTHX_ cv); /* mark this padlist as available */
331	CvPADLIST(cv) = padlist;	382	CvDEPTH (cv) = PTR2IV (POPs);
332	#ifdef USE_THREADS	383	CvPADLIST (cv) = (AV *)POPs;
333	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334	#endif
335	}
336
337	++CvDEPTH(cv);
338	}	384	}
339		385
340	PUTBACK;	386	PUTBACK;
341	}	387	}
342	}	388	}
343		389
344	static void	390	static void
345	save_state(pTHX_ Coro__State c, int flags)	391	save_perl (pTHX_ Coro__State c)
346	{	392	{
347	{	393	{
348	dSP;	394	dSP;
349	I32 cxix = cxstack_ix;	395	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	396	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	399	/*
354	* the worst thing you can imagine happens first - we have to save	400	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	401	* (and reinitialize) all cv's in the whole callchain :(
356	*/	402	*/
357		403
358	PUSHs (Nullsv);	404	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	405	/* this loop was inspired by pp_caller */
360	for (;;)	406	for (;;)
361	{	407	{
362	while (cxix >= 0)	408	while (cxix >= 0)
363	{	409	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	410	PERL_CONTEXT *cx = &ccstk[cxix--];
365		411
366	if (CxTYPE(cx) == CXt_SUB)	412	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
367	{	413	{
368	CV *cv = cx->blk_sub.cv;	414	CV *cv = cx->blk_sub.cv;
		415
369	if (CvDEPTH(cv))	416	if (CvDEPTH (cv))
370	{	417	{
371	#ifdef USE_THREADS
372	/*XPUSHs ((SV *)CvOWNER(cv));*/
373	/*CvOWNER(cv) = 0;*/
374	/*error must unlock this cv etc.. etc...*/
375	#endif
376	EXTEND (SP, CvDEPTH(cv)*2);	418	EXTEND (SP, 3);
377
378	while (--CvDEPTH(cv))
379	{
380	/* this tells the restore code to increment CvDEPTH */
381	PUSHs (Nullsv);
382	PUSHs ((SV *)cv);
383	}
384
385	PUSHs ((SV *)CvPADLIST(cv));	419	PUSHs ((SV *)CvPADLIST (cv));
		420	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
386	PUSHs ((SV *)cv);	421	PUSHs ((SV *)cv);
387		422
388	get_padlist (cv); /* this is a monster */	423	CvDEPTH (cv) = 0;
		424	get_padlist (aTHX_ cv);
389	}	425	}
390	}	426	}
391	else if (CxTYPE(cx) == CXt_FORMAT)
392	{
393	/* I never used formats, so how should I know how these are implemented? */
394	/* my bold guess is as a simple, plain sub... */
395	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396	}
397	}	427	}
398		428
399	if (top_si->si_type == PERLSI_MAIN)	429	if (top_si->si_type == PERLSI_MAIN)
400	break;	430	break;
401		431
402	top_si = top_si->si_prev;	432	top_si = top_si->si_prev;
403	ccstk = top_si->si_cxstack;	433	ccstk = top_si->si_cxstack;
404	cxix = top_si->si_cxix;	434	cxix = top_si->si_cxix;
405	}	435	}
406		436
407	PUTBACK;	437	PUTBACK;
408	}	438	}
409		439
410	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	440	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
411	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	441	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
412	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	442	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		443	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		444	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
413		445
414	c->dowarn = PL_dowarn;	446	#define VAR(name,type)c->name = PL_ ## name;
415	c->in_eval = PL_in_eval;	447	# include "state.h"
416		448	#undef VAR
417	c->curstackinfo = PL_curstackinfo;
418	c->curstack = PL_curstack;
419	c->mainstack = PL_mainstack;
420	c->stack_sp = PL_stack_sp;
421	c->op = PL_op;
422	c->curpad = PL_curpad;
423	c->stack_base = PL_stack_base;
424	c->stack_max = PL_stack_max;
425	c->tmps_stack = PL_tmps_stack;
426	c->tmps_floor = PL_tmps_floor;
427	c->tmps_ix = PL_tmps_ix;
428	c->tmps_max = PL_tmps_max;
429	c->markstack = PL_markstack;
430	c->markstack_ptr = PL_markstack_ptr;
431	c->markstack_max = PL_markstack_max;
432	c->scopestack = PL_scopestack;
433	c->scopestack_ix = PL_scopestack_ix;
434	c->scopestack_max = PL_scopestack_max;
435	c->savestack = PL_savestack;
436	c->savestack_ix = PL_savestack_ix;
437	c->savestack_max = PL_savestack_max;
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	c->curcop = PL_curcop;
442	c->top_env = PL_top_env;
443	}	449	}
444		450
445	/*	451	/*
446	* allocate various perl stacks. This is an exact copy	452	* allocate various perl stacks. This is an exact copy
447	* of perl.c:init_stacks, except that it uses less memory	453	* of perl.c:init_stacks, except that it uses less memory
448	* on the assumption that coroutines do not usually need	454	* on the (sometimes correct) assumption that coroutines do
449	* a lot of stackspace.	455	* not usually need a lot of stackspace.
450	*/	456	*/
451	STATIC void	457	#if CORO_PREFER_PERL_FUNCTIONS
		458	# define coro_init_stacks init_stacks
		459	#else
		460	static void
452	coro_init_stacks (pTHX)	461	coro_init_stacks (pTHX)
453	{	462	{
454	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	463	PL_curstackinfo = new_stackinfo(64, 6);
455	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
456	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
457	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458		467
459	PL_stack_base = AvARRAY(PL_curstack);	468	PL_stack_base = AvARRAY(PL_curstack);
460	PL_stack_sp = PL_stack_base;	469	PL_stack_sp = PL_stack_base;
461	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462		471
463	New(50,PL_tmps_stack,96,SV*);	472	New(50,PL_tmps_stack,64,SV*);
464	PL_tmps_floor = -1;	473	PL_tmps_floor = -1;
465	PL_tmps_ix = -1;	474	PL_tmps_ix = -1;
466	PL_tmps_max = 96;	475	PL_tmps_max = 64;
467		476
468	New(54,PL_markstack,16,I32);	477	New(54,PL_markstack,16,I32);
469	PL_markstack_ptr = PL_markstack;	478	PL_markstack_ptr = PL_markstack;
470	PL_markstack_max = PL_markstack + 16;	479	PL_markstack_max = PL_markstack + 16;
471		480
		481	#ifdef SET_MARK_OFFSET
472	SET_MARK_OFFSET;	482	SET_MARK_OFFSET;
		483	#endif
473		484
474	New(54,PL_scopestack,16,I32);	485	New(54,PL_scopestack,16,I32);
475	PL_scopestack_ix = 0;	486	PL_scopestack_ix = 0;
476	PL_scopestack_max = 16;	487	PL_scopestack_max = 16;
477		488
478	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,64,ANY);
479	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
480	PL_savestack_max = 96;	491	PL_savestack_max = 64;
481		492
		493	#if !PERL_VERSION_ATLEAST (5,9,0)
482	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,4,OP*);
483	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
484	PL_retstack_max = 8;	496	PL_retstack_max = 4;
		497	#endif
485	}	498	}
		499	#endif
486		500
487	/*	501	/*
488	* destroy the stacks, the callchain etc...	502	* destroy the stacks, the callchain etc...
489	* still there is a memleak of 128 bytes...
490	*/	503	*/
491	STATIC void	504	static void
492	destroy_stacks(pTHX)	505	coro_destroy_stacks (pTHX)
493	{	506	{
494	if (!IN_DESTRUCT)	507	if (!IN_DESTRUCT)
495	{	508	{
496	/* is this ugly, I ask? */	509	/* restore all saved variables and stuff */
497	while (PL_scopestack_ix)	510	LEAVE_SCOPE (0);
498	LEAVE;	511	assert (PL_tmps_floor == -1);
499		512
500	/* sure it is, but more important: is it correct?? :/ */	513	/* free all temporaries */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;	514	FREETMPS;
		515	assert (PL_tmps_ix == -1);
		516
		517	/* unwind all extra stacks */
		518	POPSTACK_TO (PL_mainstack);
		519
		520	/* unwind main stack */
		521	dounwind (-1);
503	}	522	}
504		523
505	while (PL_curstackinfo->si_next)	524	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	525	PL_curstackinfo = PL_curstackinfo->si_next;
507		526
508	while (PL_curstackinfo)	527	while (PL_curstackinfo)
509	{	528	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	529	PERL_SI *p = PL_curstackinfo->si_prev;
511		530
512	{
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	531	if (!IN_DESTRUCT)
519	{
520	dounwind(-1);
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	532	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		533
524	Safefree(PL_curstackinfo->si_cxstack);	534	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	535	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	536	PL_curstackinfo = p;
527	}	537	}
528		538
529	Safefree(PL_tmps_stack);	539	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	540	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	541	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	542	Safefree (PL_savestack);
		543	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	544	Safefree (PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#ifdef HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif	545	#endif
		546	}
		547
		548	static size_t
		549	coro_rss (struct coro *coro)
		550	{
		551	size_t rss = sizeof (coro);
		552
		553	if (coro->mainstack)
		554	{
		555	if (coro->flags & CF_RUNNING)
553	{	556	{
554	/*FIXME*//*D*//* reasonable stack size! */	557	#define VAR(name,type)coro->name = PL_ ## name;
555	stack->ssize = -4096 * sizeof (long);	558	# include "state.h"
556	New (0, stack->sptr, 4096, long);	559	#undef VAR
557	}	560	}
558	}
559	else
560	stack->sptr = 0;
561		561
562	ctx->stack = stack;	562	rss += sizeof (coro->curstackinfo);
563	}	563	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		564	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		565	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		566	rss += coro->tmps_max * sizeof (SV *);
		567	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		568	rss += coro->scopestack_max * sizeof (I32);
		569	rss += coro->savestack_max * sizeof (ANY);
564		570
565	static void	571	#if !PERL_VERSION_ATLEAST (5,9,0)
566	deallocate_stack (Coro__State ctx)	572	rss += coro->retstack_max * sizeof (OP *);
567	{	573	#endif
568	coro_stack *stack = ctx->stack;
569
570	ctx->stack = 0;
571
572	if (stack)
573	{	574	}
574	if (!--stack->refcnt)
575	{
576	#ifdef HAVE_MMAP
577	if (stack->ssize > 0 && stack->sptr)
578	munmap (stack->sptr, stack->ssize);
579	else
580	#else
581	Safefree (stack->sptr);
582	#endif
583	Safefree (stack);
584	}
585	else if (ctx->gencnt == stack->gencnt)
586	--stack->usecnt;
587	}
588	}
589		575
		576	return rss;
		577	}
		578
		579	/** coroutine stack handling ************************************************/
		580
590	static void	581	static void
591	setup_coro (void *arg)	582	setup_coro (pTHX_ struct coro *coro)
592	{	583	{
593	/*	584	/*
594	* emulate part of the perl startup here.	585	* emulate part of the perl startup here.
595	*/	586	*/
		587	coro_init_stacks (aTHX);
		588
		589	PL_curcop = &PL_compiling;
		590	PL_in_eval = EVAL_NULL;
		591	PL_comppad = 0;
		592	PL_curpm = 0;
		593	PL_localizing = 0;
		594	PL_dirty = 0;
		595	PL_restartop = 0;
		596
		597	{
		598	dSP;
		599	LOGOP myop;
		600
		601	SvREFCNT_dec (GvAV (PL_defgv));
		602	GvAV (PL_defgv) = coro->args; coro->args = 0;
		603
		604	Zero (&myop, 1, LOGOP);
		605	myop.op_next = Nullop;
		606	myop.op_flags = OPf_WANT_VOID;
		607
		608	PUSHMARK (SP);
		609	XPUSHs (av_shift (GvAV (PL_defgv)));
		610	PUTBACK;
		611	PL_op = (OP *)&myop;
		612	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		613	SPAGAIN;
		614	}
		615
		616	ENTER; /* necessary e.g. for dounwind */
		617	}
		618
		619	static void
		620	free_coro_mortal (pTHX)
		621	{
		622	if (coro_mortal)
		623	{
		624	SvREFCNT_dec (coro_mortal);
		625	coro_mortal = 0;
		626	}
		627	}
		628
		629	/* inject a fake call to Coro::State::_cctx_init into the execution */
		630	/* _cctx_init should be careful, as it could be called at almost any time */
		631	/* during execution of a perl program */
		632	static void NOINLINE
		633	prepare_cctx (pTHX_ coro_cctx *cctx)
		634	{
596	dSP;	635	dSP;
597	Coro__State ctx = (Coro__State)arg;	636	LOGOP myop;
598	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599		637
600	coro_init_stacks (aTHX);	638	Zero (&myop, 1, LOGOP);
601	/*PL_curcop = 0;*/	639	myop.op_next = PL_op;
602	/*PL_in_eval = PL_in_eval;*/ /* inherit */	640	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605		641
		642	PUSHMARK (SP);
		643	EXTEND (SP, 2);
		644	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		645	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		646	PUTBACK;
		647	PL_op = (OP *)&myop;
		648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
606	SPAGAIN;	649	SPAGAIN;
		650	}
607		651
608	if (ctx->stack)	652	/*
609	{	653	* this is a _very_ stripped down perl interpreter ;)
610	ctx->cursp = 0;	654	*/
		655	static void
		656	coro_run (void *arg)
		657	{
		658	dTHX;
611		659
612	PUSHMARK(SP);	660	/* coro_run is the alternative tail of transfer(), so unlock here. */
613	PUTBACK;	661	UNLOCK;
614	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615		662
616	if (SvTRUE (ERRSV))	663	PL_top_env = &PL_start_env;
617	croak (NULL);	664
618	else	665	/* inject a fake subroutine call to cctx_init */
619	croak ("FATAL: CCTXT coroutine returned!");	666	prepare_cctx (aTHX_ (coro_cctx *)arg);
		667
		668	/* somebody or something will hit me for both perl_run and PL_restartop */
		669	PL_restartop = PL_op;
		670	perl_run (PL_curinterp);
		671
		672	/*
		673	* If perl-run returns we assume exit() was being called or the coro
		674	* fell off the end, which seems to be the only valid (non-bug)
		675	* reason for perl_run to return. We try to exit by jumping to the
		676	* bootstrap-time "top" top_env, as we cannot restore the "main"
		677	* coroutine as Coro has no such concept
		678	*/
		679	PL_top_env = main_top_env;
		680	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		681	}
		682
		683	static coro_cctx *
		684	cctx_new ()
		685	{
		686	coro_cctx *cctx;
		687	void *stack_start;
		688	size_t stack_size;
		689
		690	++cctx_count;
		691
		692	Newz (0, cctx, 1, coro_cctx);
		693
		694	#if HAVE_MMAP
		695
		696	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		697	/* mmap supposedly does allocate-on-write for us */
		698	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		699
		700	if (cctx->sptr != (void *)-1)
		701	{
		702	# if CORO_STACKGUARD
		703	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		704	# endif
		705	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		706	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		707	cctx->mapped = 1;
620	}	708	}
621	else	709	else
622	{	710	#endif
623	UNOP myop;
624
625	PL_op = (OP *)&myop;
626
627	Zero(&myop, 1, UNOP);
628	myop.op_next = Nullop;
629	myop.op_flags = OPf_WANT_VOID;
630
631	PUSHMARK(SP);
632	XPUSHs (sub_init);
633	/*
634	* the next line is slightly wrong, as PL_op->op_next
635	* is actually being executed so we skip the first op.
636	* that doesn't matter, though, since it is only
637	* pp_nextstate and we never return...
638	* ah yes, and I don't care anyways ;)
639	*/
640	PUTBACK;
641	PL_op = pp_entersub();
642	SPAGAIN;
643
644	ENTER; /* necessary e.g. for dounwind */
645	}	711	{
646	}	712	cctx->ssize = coro_stacksize * (long)sizeof (long);
		713	New (0, cctx->sptr, coro_stacksize, long);
647		714
648	static void	715	if (!cctx->sptr)
649	continue_coro (void *arg)	716	{
650	{	717	perror ("FATAL: unable to allocate stack for coroutine");
651	/*	718	_exit (EXIT_FAILURE);
652	* this is a _very_ stripped down perl interpreter ;)	719	}
653	*/
654	Coro__State ctx = (Coro__State)arg;
655	JMPENV coro_start_env;
656		720
657	/* same as JMPENV_BOOTSTRAP */	721	stack_start = cctx->sptr;
658	Zero(&coro_start_env, 1, JMPENV);	722	stack_size = cctx->ssize;
659	coro_start_env.je_ret = -1;	723	}
660	coro_start_env.je_mustcatch = TRUE;
661	PL_top_env = &coro_start_env;
662		724
663	ctx->cursp = 0;	725	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		726	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		727
		728	return cctx;
		729	}
		730
		731	static void
		732	cctx_destroy (coro_cctx *cctx)
		733	{
		734	if (!cctx)
		735	return;
		736
		737	--cctx_count;
		738
		739	#if CORO_USE_VALGRIND
		740	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		741	#endif
		742
		743	#if HAVE_MMAP
		744	if (cctx->mapped)
		745	munmap (cctx->sptr, cctx->ssize);
		746	else
		747	#endif
		748	Safefree (cctx->sptr);
		749
		750	Safefree (cctx);
		751	}
		752
		753	static coro_cctx *
		754	cctx_get (pTHX)
		755	{
		756	while (cctx_first)
		757	{
		758	coro_cctx *cctx = cctx_first;
		759	cctx_first = cctx->next;
		760	--cctx_idle;
		761
		762	if (cctx->ssize >= coro_stacksize)
		763	return cctx;
		764
		765	cctx_destroy (cctx);
		766	}
		767
664	PL_op = PL_op->op_next;	768	PL_op = PL_op->op_next;
665	CALLRUNOPS(aTHX);	769	return cctx_new ();
666
667	abort ();
668	}	770	}
669		771
670	STATIC void	772	static void
		773	cctx_put (coro_cctx *cctx)
		774	{
		775	/* free another cctx if overlimit */
		776	if (cctx_idle >= MAX_IDLE_CCTX)
		777	{
		778	coro_cctx *first = cctx_first;
		779	cctx_first = first->next;
		780	--cctx_idle;
		781
		782	assert (!first->inuse);
		783	cctx_destroy (first);
		784	}
		785
		786	++cctx_idle;
		787	cctx->next = cctx_first;
		788	cctx_first = cctx;
		789	}
		790
		791	/** coroutine switching *****************************************************/
		792
		793	/* never call directly, always through the coro_state_transfer global variable */
		794	static void NOINLINE
671	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	795	transfer (pTHX_ struct coro *prev, struct coro *next)
672	{	796	{
673	dSTACKLEVEL;	797	dSTACKLEVEL;
674	static struct coro *xnext;
675		798
		799	/* sometimes transfer is only called to set idle_sp */
		800	if (!next)
		801	{
		802	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		803	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		804	}
676	if (prev != next)	805	else if (prev != next)
677	{	806	{
678	xnext = next;	807	coro_cctx *prev__cctx;
679		808
680	if (next->mainstack)	809	if (prev->flags & CF_NEW)
681	{	810	{
682	SAVE (prev, flags);	811	/* create a new empty context */
683	LOAD (next);	812	Newz (0, prev->cctx, 1, coro_cctx);
684		813	prev->cctx->inuse = 1;
685	/* mark this state as in-use */	814	prev->flags &= ~CF_NEW;
686	next->mainstack = 0;	815	prev->flags |= CF_RUNNING;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	/* don't add any code here */
713	}
714
715	}	816	}
716	else if (next->tmps_ix == -2)	817
717	croak ("tried to transfer to running coroutine");	818	/*TODO: must not croak here */
		819	if (!prev->flags & CF_RUNNING)
		820	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		821
		822	if (next->flags & CF_RUNNING)
		823	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		824
		825	if (next->flags & CF_DESTROYED)
		826	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		827
		828	prev->flags &= ~CF_RUNNING;
		829	next->flags |= CF_RUNNING;
		830
		831	LOCK;
		832
		833	if (next->flags & CF_NEW)
		834	{
		835	/* need to start coroutine */
		836	next->flags &= ~CF_NEW;
		837	/* first get rid of the old state */
		838	save_perl (aTHX_ prev);
		839	/* setup coroutine call */
		840	setup_coro (aTHX_ next);
		841	/* need a new stack */
		842	assert (!next->cctx);
		843	}
718	else	844	else
719	{	845	{
720	SAVE (prev, -1); /* first get rid of the old state */	846	/* coroutine already started */
721		847	save_perl (aTHX_ prev);
722	if (flags & TRANSFER_SAVE_CCTXT)	848	load_perl (aTHX_ next);
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726
727	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728	{
729	setup_coro (next);
730
731	prev->stack->refcnt++;
732	prev->stack->usecnt++;
733	next->stack = prev->stack;
734	next->gencnt = prev->gencnt;
735	}
736	else
737	{
738	allocate_stack (next, 1);
739	coro_create (&(next->stack->cctx),
740	setup_coro, (void *)next,
741	next->stack->sptr, labs (next->stack->ssize));
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745	}
746	else
747	setup_coro (next);
748	}	849	}
749		850
750	/*	851	prev__cctx = prev->cctx;
751	* xnext is now either prev or next, depending on wether	852
752	* we switched the c stack or not. that's why i use a global	853	/* possibly "free" the cctx */
753	* variable, that should become thread-specific at one point.	854	if (prev__cctx->idle_sp == STACKLEVEL)
754	*/	855	{
755	xnext->cursp = stacklevel;	856	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		857	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		858
		859	prev->cctx = 0;
		860
		861	cctx_put (prev__cctx);
		862	prev__cctx->inuse = 0;
		863	}
		864
		865	if (!next->cctx)
		866	{
		867	next->cctx = cctx_get (aTHX);
		868	assert (!next->cctx->inuse);
		869	next->cctx->inuse = 1;
		870	}
		871
		872	if (prev__cctx != next->cctx)
		873	{
		874	prev__cctx->top_env = PL_top_env;
		875	PL_top_env = next->cctx->top_env;
		876	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		877	}
		878
		879	free_coro_mortal (aTHX);
		880	UNLOCK;
		881	}
		882	}
		883
		884	struct transfer_args
		885	{
		886	struct coro *prev, *next;
		887	};
		888
		889	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		890
		891	/** high level stuff ********************************************************/
		892
		893	static int
		894	coro_state_destroy (pTHX_ struct coro *coro)
		895	{
		896	if (coro->flags & CF_DESTROYED)
		897	return 0;
		898
		899	coro->flags |= CF_DESTROYED;
		900
		901	if (coro->flags & CF_READY)
756	}	902	{
		903	/* reduce nready, as destroying a ready coro effectively unreadies it */
		904	/* alternative: look through all ready queues and remove the coro */
		905	LOCK;
		906	--coro_nready;
		907	UNLOCK;
		908	}
		909	else
		910	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		911
		912	if (coro->mainstack && coro->mainstack != main_mainstack)
		913	{
		914	struct coro temp;
		915
		916	assert (!(coro->flags & CF_RUNNING));
		917
		918	Zero (&temp, 1, struct coro);
		919	temp.save = CORO_SAVE_ALL;
		920
		921	if (coro->flags & CF_RUNNING)
		922	croak ("FATAL: tried to destroy currently running coroutine");
		923
		924	save_perl (aTHX_ &temp);
		925	load_perl (aTHX_ coro);
		926
		927	coro_destroy_stacks (aTHX);
		928
		929	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		930
		931	coro->mainstack = 0;
		932	}
		933
		934	cctx_destroy (coro->cctx);
		935	SvREFCNT_dec (coro->args);
		936
		937	if (coro->next) coro->next->prev = coro->prev;
		938	if (coro->prev) coro->prev->next = coro->next;
		939	if (coro == coro_first) coro_first = coro->next;
		940
		941	return 1;
757	}	942	}
		943
		944	static int
		945	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		946	{
		947	struct coro *coro = (struct coro *)mg->mg_ptr;
		948	mg->mg_ptr = 0;
		949
		950	coro->hv = 0;
		951
		952	if (--coro->refcnt < 0)
		953	{
		954	coro_state_destroy (aTHX_ coro);
		955	Safefree (coro);
		956	}
		957
		958	return 0;
		959	}
		960
		961	static int
		962	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		963	{
		964	struct coro *coro = (struct coro *)mg->mg_ptr;
		965
		966	++coro->refcnt;
		967
		968	return 0;
		969	}
		970
		971	static MGVTBL coro_state_vtbl = {
		972	0, 0, 0, 0,
		973	coro_state_free,
		974	0,
		975	#ifdef MGf_DUP
		976	coro_state_dup,
		977	#else
		978	# define MGf_DUP 0
		979	#endif
		980	};
758		981
759	static struct coro *	982	static struct coro *
760	sv_to_coro (SV *arg, const char *funcname, const char *varname)	983	SvSTATE_ (pTHX_ SV *coro)
761	{	984	{
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	985	HV *stash;
763	{	986	MAGIC *mg;
764	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765		987
766	if (!he)	988	if (SvROK (coro))
767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	989	coro = SvRV (coro);
768		990
769	arg = HeVAL(he);	991	stash = SvSTASH (coro);
		992	if (stash != coro_stash && stash != coro_state_stash)
770	}	993	{
		994	/* very slow, but rare, check */
		995	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		996	croak ("Coro::State object required");
771		997	}
772	/* must also be changed inside Coro::Cont::yield */
773	if (SvROK(arg) && SvOBJECT(SvRV(arg))
774	&& SvSTASH(SvRV(arg)) == coro_state_stash)
775	return (struct coro *) SvIV((SV*)SvRV(arg));
776		998
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	999	mg = CORO_MAGIC (coro);
778	/*NORETURN*/	1000	return (struct coro *)mg->mg_ptr;
779	}	1001	}
780		1002
		1003	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1004
		1005	static void
		1006	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1007	{
		1008	ta->prev = SvSTATE (prev_sv);
		1009	ta->next = SvSTATE (next_sv);
		1010	}
		1011
		1012	static void
		1013	api_transfer (SV *prev_sv, SV *next_sv)
		1014	{
		1015	dTHX;
		1016	struct transfer_args ta;
		1017
		1018	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1019	TRANSFER (ta);
		1020	}
		1021
781	static void	1022	static int
782	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1023	api_save (SV *coro_sv, int new_save)
783	{	1024	{
784	transfer(aTHX_	1025	dTHX;
785	sv_to_coro (prev, "Coro::transfer", "prev"),	1026	struct coro *coro = SvSTATE (coro_sv);
786	sv_to_coro (next, "Coro::transfer", "next"),	1027	int old_save = coro->save;
787	flags);	1028
		1029	if (new_save >= 0)
		1030	coro->save = new_save;
		1031
		1032	return old_save;
788	}	1033	}
789		1034
790	/** Coro ********************************************************************/	1035	/** Coro ********************************************************************/
791		1036
792	#define PRIO_MAX 3
793	#define PRIO_HIGH 1
794	#define PRIO_NORMAL 0
795	#define PRIO_LOW -1
796	#define PRIO_IDLE -3
797	#define PRIO_MIN -4
798
799	/* for Coro.pm */
800	static GV *coro_current, *coro_idle;
801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
802	static int coro_nready;
803
804	static void	1037	static void
805	coro_enq (SV *sv)	1038	coro_enq (pTHX_ SV *coro_sv)
806	{	1039	{
807	if (SvROK (sv))	1040	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
808	{
809	SV *hv = SvRV (sv);
810	if (SvTYPE (hv) == SVt_PVHV)
811	{
812	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815	prio = prio > PRIO_MAX ? PRIO_MAX
816	: prio < PRIO_MIN ? PRIO_MIN
817	: prio;
818
819	av_push (coro_ready [prio - PRIO_MIN], sv);
820	coro_nready++;
821
822	return;
823	}
824	}
825
826	croak ("Coro::ready tried to enqueue something that is not a coroutine");
827	}	1041	}
828		1042
829	static SV *	1043	static SV *
830	coro_deq (int min_prio)	1044	coro_deq (pTHX_ int min_prio)
831	{	1045	{
832	int prio = PRIO_MAX - PRIO_MIN;	1046	int prio = PRIO_MAX - PRIO_MIN;
833		1047
834	min_prio -= PRIO_MIN;	1048	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	1049	if (min_prio < 0)
836	min_prio = 0;	1050	min_prio = 0;
837		1051
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1052	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	1053	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready[prio]);	1054	return av_shift (coro_ready [prio]);
843	}
844		1055
845	return 0;	1056	return 0;
846	}	1057	}
847		1058
848	static void	1059	static int
849	api_ready (SV *coro)	1060	api_ready (SV *coro_sv)
850	{	1061	{
		1062	dTHX;
		1063	struct coro *coro;
		1064
		1065	if (SvROK (coro_sv))
		1066	coro_sv = SvRV (coro_sv);
		1067
		1068	coro = SvSTATE (coro_sv);
		1069
		1070	if (coro->flags & CF_READY)
		1071	return 0;
		1072
		1073	coro->flags |= CF_READY;
		1074
		1075	LOCK;
851	coro_enq (SvREFCNT_inc (coro));	1076	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
852	}	1077	++coro_nready;
		1078	UNLOCK;
853		1079
		1080	return 1;
		1081	}
		1082
854	static void	1083	static int
855	api_schedule (int cede)	1084	api_is_ready (SV *coro_sv)
856	{	1085	{
		1086	dTHX;
		1087	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1088	}
		1089
		1090	static void
		1091	prepare_schedule (pTHX_ struct transfer_args *ta)
		1092	{
857	SV *prev, *next;	1093	SV *prev_sv, *next_sv;
858		1094
		1095	for (;;)
		1096	{
		1097	LOCK;
		1098	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1099
		1100	/* nothing to schedule: call the idle handler */
		1101	if (!next_sv)
		1102	{
		1103	dSP;
		1104	UNLOCK;
		1105
		1106	ENTER;
		1107	SAVETMPS;
		1108
		1109	PUSHMARK (SP);
		1110	PUTBACK;
		1111	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1112
		1113	FREETMPS;
		1114	LEAVE;
		1115	continue;
		1116	}
		1117
		1118	ta->next = SvSTATE (next_sv);
		1119
		1120	/* cannot transfer to destroyed coros, skip and look for next */
		1121	if (ta->next->flags & CF_DESTROYED)
		1122	{
		1123	UNLOCK;
		1124	SvREFCNT_dec (next_sv);
		1125	/* coro_nready is already taken care of by destroy */
		1126	continue;
		1127	}
		1128
		1129	--coro_nready;
		1130	UNLOCK;
		1131	break;
		1132	}
		1133
		1134	/* free this only after the transfer */
859	prev = GvSV (coro_current);	1135	prev_sv = SvRV (coro_current);
		1136	SvRV_set (coro_current, next_sv);
		1137	ta->prev = SvSTATE (prev_sv);
860		1138
861	if (cede)	1139	assert (ta->next->flags & CF_READY);
862	coro_enq (SvREFCNT_inc (prev));	1140	ta->next->flags &= ~CF_READY;
863		1141
864	next = coro_deq (PRIO_MIN);	1142	LOCK;
		1143	free_coro_mortal (aTHX);
		1144	coro_mortal = prev_sv;
		1145	UNLOCK;
		1146	}
865		1147
866	if (!next)	1148	static void
867	next = SvREFCNT_inc (GvSV (coro_idle));	1149	prepare_cede (pTHX_ struct transfer_args *ta)
		1150	{
		1151	api_ready (coro_current);
		1152	prepare_schedule (aTHX_ ta);
		1153	}
868		1154
869	GvSV (coro_current) = SvREFCNT_inc (next);	1155	static int
870	transfer (aTHX_	1156	prepare_cede_notself (pTHX_ struct transfer_args *ta)
871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	1157	{
872	sv_to_coro (next, "Coro::schedule", "next coroutine"),	1158	if (coro_nready)
873	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	1159	{
874	SvREFCNT_dec (next);	1160	SV *prev = SvRV (coro_current);
875	SvREFCNT_dec (prev);	1161	prepare_schedule (aTHX_ ta);
		1162	api_ready (prev);
		1163	return 1;
		1164	}
		1165	else
		1166	return 0;
		1167	}
		1168
		1169	static void
		1170	api_schedule (void)
		1171	{
		1172	dTHX;
		1173	struct transfer_args ta;
		1174
		1175	prepare_schedule (aTHX_ &ta);
		1176	TRANSFER (ta);
		1177	}
		1178
		1179	static int
		1180	api_cede (void)
		1181	{
		1182	dTHX;
		1183	struct transfer_args ta;
		1184
		1185	prepare_cede (aTHX_ &ta);
		1186
		1187	if (ta.prev != ta.next)
		1188	{
		1189	TRANSFER (ta);
		1190	return 1;
		1191	}
		1192	else
		1193	return 0;
		1194	}
		1195
		1196	static int
		1197	api_cede_notself (void)
		1198	{
		1199	dTHX;
		1200	struct transfer_args ta;
		1201
		1202	if (prepare_cede_notself (aTHX_ &ta))
		1203	{
		1204	TRANSFER (ta);
		1205	return 1;
		1206	}
		1207	else
		1208	return 0;
876	}	1209	}
877		1210
878	MODULE = Coro::State PACKAGE = Coro::State	1211	MODULE = Coro::State PACKAGE = Coro::State
879		1212
880	PROTOTYPES: ENABLE	1213	PROTOTYPES: DISABLE
881		1214
882	BOOT:	1215	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	1216	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1217	#ifdef USE_ITHREADS
885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1218	MUTEX_INIT (&coro_mutex);
		1219	#endif
		1220	BOOT_PAGESIZE;
		1221
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1222	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		1223
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1226	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1227	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1228	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1229	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
892		1230	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
893	if (!padlist_cache)
894	padlist_cache = newHV ();
895		1231
896	main_mainstack = PL_mainstack;	1232	main_mainstack = PL_mainstack;
		1233	main_top_env = PL_top_env;
		1234
		1235	while (main_top_env->je_prev)
		1236	main_top_env = main_top_env->je_prev;
897		1237
898	coroapi.ver = CORO_API_VERSION;	1238	coroapi.ver = CORO_API_VERSION;
899	coroapi.transfer = api_transfer;	1239	coroapi.transfer = api_transfer;
900	}
901		1240
902	Coro::State	1241	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	1242	}
904	SV * args	1243
905	PROTOTYPE: $	1244	SV *
		1245	new (char *klass, ...)
906	CODE:	1246	CODE:
907	Coro__State coro;	1247	{
		1248	struct coro *coro;
		1249	HV *hv;
		1250	int i;
908		1251
909	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
910	croak ("Coro::State::_newprocess expects an arrayref");
911
912	New (0, coro, 1, struct coro);	1252	Newz (0, coro, 1, struct coro);
		1253	coro->args = newAV ();
		1254	coro->save = CORO_SAVE_DEF;
		1255	coro->flags = CF_NEW;
913		1256
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1257	if (coro_first) coro_first->prev = coro;
915	coro->mainstack = 0; /* actual work is done inside transfer */	1258	coro->next = coro_first;
916	coro->stack = 0;	1259	coro_first = coro;
917		1260
918	RETVAL = coro;	1261	coro->hv = hv = newHV ();
		1262	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1263	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1264
		1265	for (i = 1; i < items; i++)
		1266	av_push (coro->args, newSVsv (ST (i)));
		1267	}
919	OUTPUT:	1268	OUTPUT:
920	RETVAL	1269	RETVAL
921		1270
		1271	int
		1272	save (SV *coro, int new_save = -1)
		1273	CODE:
		1274	RETVAL = api_save (coro, new_save);
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
		1279	save_also (SV *coro_sv, int save_also)
		1280	CODE:
		1281	{
		1282	struct coro *coro = SvSTATE (coro_sv);
		1283	RETVAL = coro->save;
		1284	coro->save |= save_also;
		1285	}
		1286	OUTPUT:
		1287	RETVAL
		1288
922	void	1289	void
923	transfer(prev, next, flags)	1290	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1291	ALIAS:
925	Coro::State_or_hashref next	1292	Coro::State::transfer = 1
926	int flags	1293	Coro::schedule = 2
927	PROTOTYPE: @	1294	Coro::cede = 3
		1295	Coro::cede_notself = 4
928	CODE:	1296	CODE:
929	PUTBACK;	1297	{
930	transfer (aTHX_ prev, next, flags);	1298	struct transfer_args ta;
931	SPAGAIN;	1299
		1300	switch (ix)
		1301	{
		1302	case 0:
		1303	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1304	ta.next = 0;
		1305	break;
		1306
		1307	case 1:
		1308	if (items != 2)
		1309	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1310
		1311	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1312	break;
		1313
		1314	case 2:
		1315	prepare_schedule (aTHX_ &ta);
		1316	break;
		1317
		1318	case 3:
		1319	prepare_cede (aTHX_ &ta);
		1320	break;
		1321
		1322	case 4:
		1323	if (!prepare_cede_notself (aTHX_ &ta))
		1324	XSRETURN_EMPTY;
		1325
		1326	break;
		1327	}
		1328
		1329	BARRIER;
		1330	TRANSFER (ta);
		1331
		1332	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1333	XSRETURN_YES;
		1334	}
		1335
		1336	bool
		1337	_destroy (SV *coro_sv)
		1338	CODE:
		1339	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1340	OUTPUT:
		1341	RETVAL
932		1342
933	void	1343	void
934	DESTROY(coro)
935	Coro::State coro
936	CODE:
937
938	if (coro->mainstack && coro->mainstack != main_mainstack)
939	{
940	struct coro temp;
941
942	PUTBACK;
943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944	LOAD(aTHX_ coro);
945	SPAGAIN;
946
947	destroy_stacks (aTHX);
948
949	LOAD((&temp)); /* this will get rid of defsv etc.. */
950	SPAGAIN;
951
952	coro->mainstack = 0;
953	}
954
955	deallocate_stack (coro);
956
957	Safefree (coro);
958
959	void
960	flush()
961	CODE:
962	#ifdef MAY_FLUSH
963	flush_padlist_cache ();
964	#endif
965
966	void
967	_exit(code)	1344	_exit (code)
968	int code	1345	int code
969	PROTOTYPE: $	1346	PROTOTYPE: $
970	CODE:	1347	CODE:
971	#if defined(__GLIBC__) || _POSIX_C_SOURCE
972	_exit (code);	1348	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978		1349
979	MODULE = Coro::State PACKAGE = Coro::Cont	1350	int
		1351	cctx_stacksize (int new_stacksize = 0)
		1352	CODE:
		1353	RETVAL = coro_stacksize;
		1354	if (new_stacksize)
		1355	coro_stacksize = new_stacksize;
		1356	OUTPUT:
		1357	RETVAL
980		1358
981	# this is slightly dirty (should expose a c-level api)	1359	int
		1360	cctx_count ()
		1361	CODE:
		1362	RETVAL = cctx_count;
		1363	OUTPUT:
		1364	RETVAL
		1365
		1366	int
		1367	cctx_idle ()
		1368	CODE:
		1369	RETVAL = cctx_idle;
		1370	OUTPUT:
		1371	RETVAL
982		1372
983	void	1373	void
984	yield(...)	1374	list ()
985	PROTOTYPE: @	1375	PPCODE:
		1376	{
		1377	struct coro *coro;
		1378	for (coro = coro_first; coro; coro = coro->next)
		1379	if (coro->hv)
		1380	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1381	}
		1382
		1383	void
		1384	_eval (Coro::State coro, SV *coderef)
		1385	CODE:
		1386	{
		1387	if (coro->mainstack)
		1388	{
		1389	struct coro temp;
		1390	Zero (&temp, 1, struct coro);
		1391	temp.save = CORO_SAVE_ALL;
		1392
		1393	if (!(coro->flags & CF_RUNNING))
		1394	{
		1395	save_perl (aTHX_ &temp);
		1396	load_perl (aTHX_ coro);
		1397	}
		1398
		1399	{
		1400	dSP;
		1401	ENTER;
		1402	SAVETMPS;
		1403	PUSHMARK (SP);
		1404	PUTBACK;
		1405	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1406	SPAGAIN;
		1407	FREETMPS;
		1408	LEAVE;
		1409	PUTBACK;
		1410	}
		1411
		1412	if (!(coro->flags & CF_RUNNING))
		1413	{
		1414	save_perl (aTHX_ coro);
		1415	load_perl (aTHX_ &temp);
		1416	}
		1417	}
		1418	}
		1419
		1420	SV *
		1421	is_ready (Coro::State coro)
		1422	PROTOTYPE: $
		1423	ALIAS:
		1424	is_ready = CF_READY
		1425	is_running = CF_RUNNING
		1426	is_new = CF_NEW
		1427	is_destroyed = CF_DESTROYED
		1428	CODE:
		1429	RETVAL = boolSV (coro->flags & ix);
		1430	OUTPUT:
		1431	RETVAL
		1432
		1433	IV
		1434	rss (Coro::State coro)
		1435	PROTOTYPE: $
986	CODE:	1436	CODE:
987	static SV *returnstk;	1437	RETVAL = coro_rss (coro);
988	SV *sv;	1438	OUTPUT:
989	AV *defav = GvAV (PL_defgv);	1439	RETVAL
990	struct coro *prev, *next;
991		1440
992	if (!returnstk)
993	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995	/* set up @_ -- ugly */
996	av_clear (defav);
997	av_fill (defav, items - 1);
998	while (items--)
999	av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002	sv = av_pop ((AV *)SvRV (returnstk));
1003	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005	SvREFCNT_dec (sv);
1006
1007	transfer(aTHX_ prev, next, 0);
1008		1441
1009	MODULE = Coro::State PACKAGE = Coro	1442	MODULE = Coro::State PACKAGE = Coro
1010		1443
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1444	BOOT:
1014	{	1445	{
1015	int i;	1446	int i;
		1447
		1448	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1449	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1450	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1451
		1452	coro_current = get_sv ("Coro::current", FALSE);
		1453	SvREADONLY_on (coro_current);
		1454
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1455	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1456
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1457	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1458	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1459	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1460	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1461	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1462	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027		1463
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1464	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029	coro_ready[i] = newAV ();	1465	coro_ready[i] = newAV ();
1030		1466
1031	{	1467	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1468	SV *sv = perl_get_sv("Coro::API", 1);
1033		1469
1034	coroapi.schedule = api_schedule;	1470	coroapi.schedule = api_schedule;
		1471	coroapi.save = api_save;
		1472	coroapi.cede = api_cede;
		1473	coroapi.cede_notself = api_cede_notself;
1035	coroapi.ready = api_ready;	1474	coroapi.ready = api_ready;
		1475	coroapi.is_ready = api_is_ready;
1036	coroapi.nready = &coro_nready;	1476	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1477	coroapi.current = coro_current;
1038		1478
1039	GCoroAPI = &coroapi;	1479	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1480	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1481	SvREADONLY_on (sv);
1042	}	1482	}
1043	}	1483	}
1044		1484
1045	void	1485	void
1046	ready(self)	1486	_set_current (SV *current)
1047	SV * self	1487	PROTOTYPE: $
1048	CODE:	1488	CODE:
1049	api_ready (self);	1489	SvREFCNT_dec (SvRV (coro_current));
		1490	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1050		1491
1051	int	1492	int
		1493	prio (Coro::State coro, int newprio = 0)
		1494	ALIAS:
		1495	nice = 1
		1496	CODE:
		1497	{
		1498	RETVAL = coro->prio;
		1499
		1500	if (items > 1)
		1501	{
		1502	if (ix)
		1503	newprio = coro->prio - newprio;
		1504
		1505	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1506	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1507
		1508	coro->prio = newprio;
		1509	}
		1510	}
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	SV *
		1515	ready (SV *self)
		1516	PROTOTYPE: $
		1517	CODE:
		1518	RETVAL = boolSV (api_ready (self));
		1519	OUTPUT:
		1520	RETVAL
		1521
		1522	int
1052	nready(...)	1523	nready (...)
1053	PROTOTYPE:	1524	PROTOTYPE:
1054	CODE:	1525	CODE:
1055	RETVAL = coro_nready;	1526	RETVAL = coro_nready;
1056	OUTPUT:	1527	OUTPUT:
1057	RETVAL	1528	RETVAL
1058		1529
		1530	# for async_pool speedup
1059	void	1531	void
1060	schedule(...)	1532	_pool_1 (SV *cb)
1061	PROTOTYPE:
1062	ALIAS:
1063	cede = 1
1064	CODE:	1533	CODE:
1065	api_schedule (ix);	1534	{
		1535	int i, len;
		1536	HV *hv = (HV *)SvRV (coro_current);
		1537	AV *defav = GvAV (PL_defgv);
		1538	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1539	AV *invoke_av;
1066		1540
		1541	if (!invoke)
		1542	croak ("\3terminate\2\n");
		1543
		1544	hv_store (hv, "desc", sizeof ("desc") - 1,
		1545	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1546
		1547	invoke_av = (AV *)SvRV (invoke);
		1548	len = av_len (invoke_av);
		1549
		1550	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1551
		1552	if (len > 0)
		1553	{
		1554	av_fill (defav, len - 1);
		1555	for (i = 0; i < len; ++i)
		1556	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1557	}
		1558
		1559	SvREFCNT_dec (invoke);
		1560	}
		1561
		1562	void
		1563	_pool_2 (SV *cb)
		1564	CODE:
		1565	{
		1566	struct coro *coro = SvSTATE (coro_current);
		1567
		1568	sv_setsv (cb, &PL_sv_undef);
		1569
		1570	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1571	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1572	croak ("\3terminate\2\n");
		1573
		1574	av_clear (GvAV (PL_defgv));
		1575	hv_store (SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1576	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1577	coro->save = CORO_SAVE_DEF;
		1578	coro->prio = 0;
		1579	av_push (av_async_pool, newSVsv (coro_current));
		1580	}
		1581
		1582
		1583	MODULE = Coro::State PACKAGE = Coro::AIO
		1584
		1585	SV *
		1586	_get_state ()
		1587	CODE:
		1588	{
		1589	struct io_state *data;
		1590
		1591	RETVAL = newSV (sizeof (struct io_state));
		1592	data = (struct io_state *)SvPVX (RETVAL);
		1593	SvCUR_set (RETVAL, sizeof (struct io_state));
		1594	SvPOK_only (RETVAL);
		1595
		1596	data->errorno = errno;
		1597	data->laststype = PL_laststype;
		1598	data->laststatval = PL_laststatval;
		1599	data->statcache = PL_statcache;
		1600	}
		1601	OUTPUT:
		1602	RETVAL
		1603
		1604	void
		1605	_set_state (char *data_)
		1606	PROTOTYPE: $
		1607	CODE:
		1608	{
		1609	struct io_state *data = (void *)data_;
		1610
		1611	errno = data->errorno;
		1612	PL_laststype = data->laststype;
		1613	PL_laststatval = data->laststatval;
		1614	PL_statcache = data->statcache;
		1615	}
		1616

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