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Comparing Coro/Coro/State.xs (file contents):
Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC vs.
Revision 1.166 by root, Wed Sep 26 21:11:28 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 MAY_FLUSH /* increases codesize and is rarely used */	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
45		83
46	#define SUB_INIT "Coro::State::initialize"	84	#ifndef CORO_STACKGUARD
47	#define UCORO_STATE "_coro_state"	85	# define CORO_STACKGUARD 0
		86	#endif
48		87
49	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
50	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
51	* and should be unique. */	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
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
53		97
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		99
56	#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))
57		109
58	#include "CoroAPI.h"	110	#include "CoroAPI.h"
59		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;
60	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 */
61		136
62	/* 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	enum {
		146	CC_MAPPED = 0x01,
		147	CC_TRACE = 0x02,
		148	CC_NOREUSE = 0x04, /* throw this away after tracing */
		149	};
		150
		151	/* this is a structure representing a c-level coroutine */
63	typedef struct {	152	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	153	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		154
		155	/* the stack */
		156	void *sptr;
		157	size_t ssize;
		158
		159	/* cpu state */
		160	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		161	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		162	JMPENV *top_env;
68	coro_context cctx;	163	coro_context cctx;
69		164
70	void *sptr;	165	#if CORO_USE_VALGRIND
71	long ssize; /* positive == mmap, otherwise malloc */	166	int valgrind_id;
72	} coro_stack;	167	#endif
		168	unsigned char flags;
		169	} coro_cctx;
73		170
		171	enum {
		172	CF_RUNNING = 0x0001, /* coroutine is running */
		173	CF_READY = 0x0002, /* coroutine is ready */
		174	CF_NEW = 0x0004, /* has never been switched to */
		175	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		176	};
		177
		178	/* this is a structure representing a perl-level coroutine */
74	struct coro {	179	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	180	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	181	coro_cctx *cctx;
77
78	/* the optional C context */
79	coro_stack *stack;
80	void *cursp;
81	int gencnt;
82
83	/* optionally saved, might be zero */
84	AV *defav;
85	SV *defsv;
86	SV *errsv;
87
88	/* saved global state not related to stacks */
89	U8 dowarn;
90	I32 in_eval;
91
92	/* the stacks and related info (callchain etc..) */
93	PERL_SI *curstackinfo;
94	AV *curstack;
95	AV *mainstack;
96	SV **stack_sp;
97	OP *op;
98	SV **curpad;
99	AV *comppad;
100	SV **stack_base;
101	SV **stack_max;
102	SV **tmps_stack;
103	I32 tmps_floor;
104	I32 tmps_ix;
105	I32 tmps_max;
106	I32 *markstack;
107	I32 *markstack_ptr;
108	I32 *markstack_max;
109	I32 *scopestack;
110	I32 scopestack_ix;
111	I32 scopestack_max;
112	ANY *savestack;
113	I32 savestack_ix;
114	I32 savestack_max;
115	OP **retstack;
116	I32 retstack_ix;
117	I32 retstack_max;
118	COP *curcop;
119	JMPENV *top_env;
120		182
121	/* data associated with this coroutine (initial args) */	183	/* data associated with this coroutine (initial args) */
122	AV *args;	184	AV *args;
		185	int refcnt;
		186	int save; /* CORO_SAVE flags */
		187	int flags; /* CF_ flags */
		188
		189	/* optionally saved, might be zero */
		190	AV *defav; /* @_ */
		191	SV *defsv; /* $_ */
		192	SV *errsv; /* $@ */
		193	GV *deffh; /* default filehandle */
		194	SV *irssv; /* $/ */
		195	SV *irssv_sv; /* real $/ cache */
		196
		197	#define VAR(name,type) type name;
		198	# include "state.h"
		199	#undef VAR
		200
		201	/* coro process data */
		202	int prio;
		203
		204	/* linked list */
		205	struct coro *next, *prev;
		206	HV *hv; /* the perl hash associated with this coro, if any */
123	};	207	};
124		208
125	typedef struct coro *Coro__State;	209	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	210	typedef struct coro *Coro__State_or_hashref;
127		211
128	static AV *main_mainstack; /* used to differentiate between $main and others */	212	/** Coro ********************************************************************/
129	static HV *coro_state_stash;
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV *coro_mortal; /* will be freed after next transfer */
134		213
135	/* mostly copied from op.c:cv_clone2 */	214	#define PRIO_MAX 3
136	STATIC AV *	215	#define PRIO_HIGH 1
137	clone_padlist (AV *protopadlist)	216	#define PRIO_NORMAL 0
		217	#define PRIO_LOW -1
		218	#define PRIO_IDLE -3
		219	#define PRIO_MIN -4
		220
		221	/* for Coro.pm */
		222	static SV *coro_current;
		223	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		224	static int coro_nready;
		225	static struct coro *coro_first;
		226
		227	/** lowlevel stuff **********************************************************/
		228
		229	static AV *
		230	coro_clone_padlist (pTHX_ CV *cv)
138	{	231	{
139	AV *av;	232	AV *padlist = CvPADLIST (cv);
140	I32 ix;
141	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
142	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV *newpadlist, *newpad_name, *newpad;	233	AV *newpadlist, *newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157		234
158	newpadlist = newAV ();	235	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	236	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	237	#if PERL_VERSION_ATLEAST (5,9,0)
		238	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		239	#else
		240	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		241	#endif
		242	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		243	--AvFILLp (padlist);
		244
		245	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	246	av_store (newpadlist, 1, (SV *)newpad);
162		247
163	av = newAV (); /* will be @_ */	248	return newpadlist;
164	av_extend (av, 0);	249	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		250
168	for (ix = fpad; ix > 0; ix--)	251	static void
		252	free_padlist (pTHX_ AV *padlist)
		253	{
		254	/* may be during global destruction */
		255	if (SvREFCNT (padlist))
169	{	256	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	257	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	258	while (i >= 0)
172	{	259	{
173	char *name = SvPVX (namesv); /* XXX */	260	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	261	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	262	{
178	else
179	{ /* our own lexical */
180	SV *sv;	263	SV *sv;
181	if (*name == '&')	264	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	265	SvREFCNT_dec (sv);
183	else if (*name == '@')	266
184	sv = (SV *) newAV ();	267	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	#ifdef SvPADBUSY
190	if (!SvPADBUSY (sv))
191	#endif
192	SvPADMY_on (sv);
193	npad[ix] = sv;
194	}	268	}
195	}	269	}
196	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	270
		271	SvREFCNT_dec ((SV*)padlist);
		272	}
		273	}
		274
		275	static int
		276	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		277	{
		278	AV *padlist;
		279	AV *av = (AV *)mg->mg_obj;
		280
		281	/* casting is fun. */
		282	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		283	free_padlist (aTHX_ padlist);
		284
		285	SvREFCNT_dec (av);
		286
		287	return 0;
		288	}
		289
		290	#define PERL_MAGIC_coro PERL_MAGIC_ext
		291
		292	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		293
		294	#define CORO_MAGIC(cv) \
		295	SvMAGIC (cv) \
		296	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		297	? SvMAGIC (cv) \
		298	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		299	: 0
		300
		301	/* the next two functions merely cache the padlists */
		302	static void
		303	get_padlist (pTHX_ CV *cv)
		304	{
		305	MAGIC *mg = CORO_MAGIC (cv);
		306	AV *av;
		307
		308	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		309	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		310	else
		311	{
		312	#if CORO_PREFER_PERL_FUNCTIONS
		313	/* this is probably cleaner, but also slower? */
		314	CV *cp = Perl_cv_clone (cv);
		315	CvPADLIST (cv) = CvPADLIST (cp);
		316	CvPADLIST (cp) = 0;
		317	SvREFCNT_dec (cp);
		318	#else
		319	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		320	#endif
		321	}
		322	}
		323
		324	static void
		325	put_padlist (pTHX_ CV *cv)
		326	{
		327	MAGIC *mg = CORO_MAGIC (cv);
		328	AV *av;
		329
		330	if (!mg)
		331	{
		332	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		333	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		334	mg->mg_virtual = &vtbl_coro;
		335	mg->mg_obj = (SV *)newAV ();
		336	}
		337
		338	av = (AV *)mg->mg_obj;
		339
		340	if (AvFILLp (av) >= AvMAX (av))
		341	av_extend (av, AvMAX (av) + 1);
		342
		343	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		344	}
		345
		346	/** load & save, init *******************************************************/
		347
		348	#define SB do {
		349	#define SE } while (0)
		350
		351	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
		352
		353	static void
		354	load_perl (pTHX_ Coro__State c)
		355	{
		356	#define VAR(name,type) PL_ ## name = c->name;
		357	# include "state.h"
		358	#undef VAR
		359
		360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		363	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		364
		365	if (c->irssv)
		366	{
		367	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
197	{	368	{
198	npad[ix] = SvREFCNT_inc (ppad[ix]);	369	SvREFCNT_dec (c->irssv);
		370	c->irssv = 0;
199	}	371	}
200	else	372	else
201	{	373	{
202	SV *sv = NEWSV (0, 0);	374	REPLACE_SV (PL_rs, c->irssv);
203	SvPADTMP_on (sv);	375	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
204	npad[ix] = sv;	376	sv_setsv (c->irssv_sv, PL_rs);
205	}	377	}
206	}	378	}
207
208	#if 0 /* return -ENOTUNDERSTOOD */
209	/* Now that vars are all in place, clone nested closures. */
210
211	for (ix = fpad; ix > 0; ix--) {
212	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
213	if (namesv
214	&& namesv != &PL_sv_undef
215	&& !(SvFLAGS(namesv) & SVf_FAKE)
216	&& *SvPVX(namesv) == '&'
217	&& CvCLONE(ppad[ix]))
218	{
219	CV *kid = cv_clone((CV*)ppad[ix]);
220	SvREFCNT_dec(ppad[ix]);
221	CvCLONE_on(kid);
222	SvPADMY_on(kid);
223	npad[ix] = (SV*)kid;
224	}
225	}
226	#endif
227
228	return newpadlist;
229	}
230
231	#ifdef MAY_FLUSH
232	STATIC void
233	free_padlist (AV *padlist)
234	{
235	/* may be during global destruction */
236	if (SvREFCNT(padlist))
237	{
238	I32 i = AvFILLp(padlist);
239	while (i >= 0)
240	{
241	SV **svp = av_fetch(padlist, i--, FALSE);
242	SV *sv = svp ? *svp : Nullsv;
243	if (sv)
244	SvREFCNT_dec(sv);
245	}
246
247	SvREFCNT_dec((SV*)padlist);
248	}
249	}
250	#endif
251
252	/* the next two functions merely cache the padlists */
253	STATIC void
254	get_padlist (CV *cv)
255	{
256	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
257
258	if (he && AvFILLp ((AV *)*he) >= 0)
259	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
260	else
261	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
262	}
263
264	STATIC void
265	put_padlist (CV *cv)
266	{
267	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
268
269	if (SvTYPE (*he) != SVt_PVAV)
270	{
271	SvREFCNT_dec (*he);
272	*he = (SV *)newAV ();
273	}
274
275	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
276	}
277
278	#ifdef MAY_FLUSH
279	STATIC void
280	flush_padlist_cache ()
281	{
282	HV *hv = padlist_cache;
283	padlist_cache = newHV ();
284
285	if (hv_iterinit (hv))
286	{
287	HE *he;
288	AV *padlist;
289
290	while (!!(he = hv_iternext (hv)))
291	{
292	AV *av = (AV *)HeVAL(he);
293
294	/* casting is fun. */
295	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
296	free_padlist (padlist);
297	}
298	}
299
300	SvREFCNT_dec (hv);
301	}
302	#endif
303
304	#define SB do {
305	#define SE } while (0)
306
307	#define LOAD(state) load_state(aTHX_ (state));
308	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
309
310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
311
312	static void
313	load_state(pTHX_ Coro__State c)
314	{
315	PL_dowarn = c->dowarn;
316	PL_in_eval = c->in_eval;
317
318	PL_curstackinfo = c->curstackinfo;
319	PL_curstack = c->curstack;
320	PL_mainstack = c->mainstack;
321	PL_stack_sp = c->stack_sp;
322	PL_op = c->op;
323	PL_curpad = c->curpad;
324	PL_comppad = c->comppad;
325	PL_stack_base = c->stack_base;
326	PL_stack_max = c->stack_max;
327	PL_tmps_stack = c->tmps_stack;
328	PL_tmps_floor = c->tmps_floor;
329	PL_tmps_ix = c->tmps_ix;
330	PL_tmps_max = c->tmps_max;
331	PL_markstack = c->markstack;
332	PL_markstack_ptr = c->markstack_ptr;
333	PL_markstack_max = c->markstack_max;
334	PL_scopestack = c->scopestack;
335	PL_scopestack_ix = c->scopestack_ix;
336	PL_scopestack_max = c->scopestack_max;
337	PL_savestack = c->savestack;
338	PL_savestack_ix = c->savestack_ix;
339	PL_savestack_max = c->savestack_max;
340	PL_retstack = c->retstack;
341	PL_retstack_ix = c->retstack_ix;
342	PL_retstack_max = c->retstack_max;
343	PL_curcop = c->curcop;
344	PL_top_env = c->top_env;
345
346	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
347	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
348	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
349		379
350	{	380	{
351	dSP;	381	dSP;
352	CV *cv;	382	CV *cv;
353		383
354	/* now do the ugly restore mess */	384	/* now do the ugly restore mess */
355	while ((cv = (CV *)POPs))	385	while ((cv = (CV *)POPs))
356	{	386	{
357	AV *padlist = (AV *)POPs;
358
359	if (padlist)
360	{
361	put_padlist (cv); /* mark this padlist as available */	387	put_padlist (aTHX_ cv); /* mark this padlist as available */
362	CvPADLIST(cv) = padlist;	388	CvDEPTH (cv) = PTR2IV (POPs);
363	#ifdef USE_THREADS	389	CvPADLIST (cv) = (AV *)POPs;
364	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
365	#endif
366	}
367
368	++CvDEPTH(cv);
369	}	390	}
370		391
371	PUTBACK;	392	PUTBACK;
372	}	393	}
373	}	394	}
374		395
375	static void	396	static void
376	save_state(pTHX_ Coro__State c, int flags)	397	save_perl (pTHX_ Coro__State c)
377	{	398	{
378	{	399	{
379	dSP;	400	dSP;
380	I32 cxix = cxstack_ix;	401	I32 cxix = cxstack_ix;
381	PERL_CONTEXT *ccstk = cxstack;	402	PERL_CONTEXT *ccstk = cxstack;
…		…
384	/*	405	/*
385	* the worst thing you can imagine happens first - we have to save	406	* the worst thing you can imagine happens first - we have to save
386	* (and reinitialize) all cv's in the whole callchain :(	407	* (and reinitialize) all cv's in the whole callchain :(
387	*/	408	*/
388		409
389	PUSHs (Nullsv);	410	XPUSHs (Nullsv);
390	/* this loop was inspired by pp_caller */	411	/* this loop was inspired by pp_caller */
391	for (;;)	412	for (;;)
392	{	413	{
393	while (cxix >= 0)	414	while (cxix >= 0)
394	{	415	{
395	PERL_CONTEXT *cx = &ccstk[cxix--];	416	PERL_CONTEXT *cx = &ccstk[cxix--];
396		417
397	if (CxTYPE(cx) == CXt_SUB)	418	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
398	{	419	{
399	CV *cv = cx->blk_sub.cv;	420	CV *cv = cx->blk_sub.cv;
		421
400	if (CvDEPTH(cv))	422	if (CvDEPTH (cv))
401	{	423	{
402	#ifdef USE_THREADS
403	/*XPUSHs ((SV *)CvOWNER(cv));*/
404	/*CvOWNER(cv) = 0;*/
405	/*error must unlock this cv etc.. etc...*/
406	#endif
407	EXTEND (SP, CvDEPTH(cv)*2);	424	EXTEND (SP, 3);
408
409	while (--CvDEPTH(cv))
410	{
411	/* this tells the restore code to increment CvDEPTH */
412	PUSHs (Nullsv);
413	PUSHs ((SV *)cv);
414	}
415
416	PUSHs ((SV *)CvPADLIST(cv));	425	PUSHs ((SV *)CvPADLIST (cv));
		426	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
417	PUSHs ((SV *)cv);	427	PUSHs ((SV *)cv);
418		428
419	get_padlist (cv); /* this is a monster */	429	CvDEPTH (cv) = 0;
		430	get_padlist (aTHX_ cv);
420	}	431	}
421	}	432	}
422	#ifdef CXt_FORMAT
423	else if (CxTYPE(cx) == CXt_FORMAT)
424	{
425	/* I never used formats, so how should I know how these are implemented? */
426	/* my bold guess is as a simple, plain sub... */
427	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
428	}
429	#endif
430	}	433	}
431		434
432	if (top_si->si_type == PERLSI_MAIN)	435	if (top_si->si_type == PERLSI_MAIN)
433	break;	436	break;
434		437
435	top_si = top_si->si_prev;	438	top_si = top_si->si_prev;
436	ccstk = top_si->si_cxstack;	439	ccstk = top_si->si_cxstack;
437	cxix = top_si->si_cxix;	440	cxix = top_si->si_cxix;
438	}	441	}
439		442
440	PUTBACK;	443	PUTBACK;
441	}	444	}
442		445
443	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	446	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
444	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	447	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
445	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	448	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		449	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		450	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
446		451
447	c->dowarn = PL_dowarn;	452	#define VAR(name,type)c->name = PL_ ## name;
448	c->in_eval = PL_in_eval;	453	# include "state.h"
449		454	#undef VAR
450	c->curstackinfo = PL_curstackinfo;
451	c->curstack = PL_curstack;
452	c->mainstack = PL_mainstack;
453	c->stack_sp = PL_stack_sp;
454	c->op = PL_op;
455	c->curpad = PL_curpad;
456	c->comppad = PL_comppad;
457	c->stack_base = PL_stack_base;
458	c->stack_max = PL_stack_max;
459	c->tmps_stack = PL_tmps_stack;
460	c->tmps_floor = PL_tmps_floor;
461	c->tmps_ix = PL_tmps_ix;
462	c->tmps_max = PL_tmps_max;
463	c->markstack = PL_markstack;
464	c->markstack_ptr = PL_markstack_ptr;
465	c->markstack_max = PL_markstack_max;
466	c->scopestack = PL_scopestack;
467	c->scopestack_ix = PL_scopestack_ix;
468	c->scopestack_max = PL_scopestack_max;
469	c->savestack = PL_savestack;
470	c->savestack_ix = PL_savestack_ix;
471	c->savestack_max = PL_savestack_max;
472	c->retstack = PL_retstack;
473	c->retstack_ix = PL_retstack_ix;
474	c->retstack_max = PL_retstack_max;
475	c->curcop = PL_curcop;
476	c->top_env = PL_top_env;
477	}	455	}
478		456
479	/*	457	/*
480	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
481	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
482	* on the assumption that coroutines do not usually need	460	* on the (sometimes correct) assumption that coroutines do
483	* a lot of stackspace.	461	* not usually need a lot of stackspace.
484	*/	462	*/
485	STATIC void	463	#if CORO_PREFER_PERL_FUNCTIONS
		464	# define coro_init_stacks init_stacks
		465	#else
		466	static void
486	coro_init_stacks (pTHX)	467	coro_init_stacks (pTHX)
487	{	468	{
488	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	469	PL_curstackinfo = new_stackinfo(64, 6);
489	PL_curstackinfo->si_type = PERLSI_MAIN;	470	PL_curstackinfo->si_type = PERLSI_MAIN;
490	PL_curstack = PL_curstackinfo->si_stack;	471	PL_curstack = PL_curstackinfo->si_stack;
491	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
492		473
493	PL_stack_base = AvARRAY(PL_curstack);	474	PL_stack_base = AvARRAY(PL_curstack);
494	PL_stack_sp = PL_stack_base;	475	PL_stack_sp = PL_stack_base;
495	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
496		477
497	New(50,PL_tmps_stack,96,SV*);	478	New(50,PL_tmps_stack,64,SV*);
498	PL_tmps_floor = -1;	479	PL_tmps_floor = -1;
499	PL_tmps_ix = -1;	480	PL_tmps_ix = -1;
500	PL_tmps_max = 96;	481	PL_tmps_max = 64;
501		482
502	New(54,PL_markstack,16,I32);	483	New(54,PL_markstack,16,I32);
503	PL_markstack_ptr = PL_markstack;	484	PL_markstack_ptr = PL_markstack;
504	PL_markstack_max = PL_markstack + 16;	485	PL_markstack_max = PL_markstack + 16;
505		486
…		…
509		490
510	New(54,PL_scopestack,16,I32);	491	New(54,PL_scopestack,16,I32);
511	PL_scopestack_ix = 0;	492	PL_scopestack_ix = 0;
512	PL_scopestack_max = 16;	493	PL_scopestack_max = 16;
513		494
514	New(54,PL_savestack,96,ANY);	495	New(54,PL_savestack,64,ANY);
515	PL_savestack_ix = 0;	496	PL_savestack_ix = 0;
516	PL_savestack_max = 96;	497	PL_savestack_max = 64;
517		498
		499	#if !PERL_VERSION_ATLEAST (5,9,0)
518	New(54,PL_retstack,8,OP*);	500	New(54,PL_retstack,4,OP*);
519	PL_retstack_ix = 0;	501	PL_retstack_ix = 0;
520	PL_retstack_max = 8;	502	PL_retstack_max = 4;
		503	#endif
521	}	504	}
		505	#endif
522		506
523	/*	507	/*
524	* destroy the stacks, the callchain etc...	508	* destroy the stacks, the callchain etc...
525	*/	509	*/
526	STATIC void	510	static void
527	destroy_stacks(pTHX)	511	coro_destroy_stacks (pTHX)
528	{	512	{
529	if (!IN_DESTRUCT)	513	if (!IN_DESTRUCT)
530	{	514	{
531	/* is this ugly, I ask? */	515	/* restore all saved variables and stuff */
532	while (PL_scopestack_ix)	516	LEAVE_SCOPE (0);
533	LEAVE;	517	assert (PL_tmps_floor == -1);
534		518
535	/* sure it is, but more important: is it correct?? :/ */	519	/* free all temporaries */
536	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
537	FREETMPS;	520	FREETMPS;
		521	assert (PL_tmps_ix == -1);
		522
		523	/* unwind all extra stacks */
		524	POPSTACK_TO (PL_mainstack);
		525
		526	/* unwind main stack */
		527	dounwind (-1);
538	}	528	}
539		529
540	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
541	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
542		532
543	while (PL_curstackinfo)	533	while (PL_curstackinfo)
544	{	534	{
545	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
546		536
547	{
548	dSP;
549	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
550	PUTBACK; /* possibly superfluous */
551	}
552
553	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
554	{
555	dounwind(-1);
556	SvREFCNT_dec(PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
557	}
558		539
559	Safefree(PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
560	Safefree(PL_curstackinfo);	541	Safefree (PL_curstackinfo);
561	PL_curstackinfo = p;	542	PL_curstackinfo = p;
562	}	543	}
563		544
564	Safefree(PL_tmps_stack);	545	Safefree (PL_tmps_stack);
565	Safefree(PL_markstack);	546	Safefree (PL_markstack);
566	Safefree(PL_scopestack);	547	Safefree (PL_scopestack);
567	Safefree(PL_savestack);	548	Safefree (PL_savestack);
		549	#if !PERL_VERSION_ATLEAST (5,9,0)
568	Safefree(PL_retstack);	550	Safefree (PL_retstack);
569	}
570
571	static void
572	allocate_stack (Coro__State ctx, int alloc)
573	{
574	coro_stack *stack;
575
576	New (0, stack, 1, coro_stack);
577
578	stack->refcnt = 1;
579	stack->usecnt = 1;
580	stack->gencnt = ctx->gencnt = 0;
581	if (alloc)
582	{
583	#if HAVE_MMAP
584	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
585	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586	if (stack->sptr == (void *)-1)
587	#endif	551	#endif
		552	}
		553
		554	static size_t
		555	coro_rss (struct coro *coro)
		556	{
		557	size_t rss = sizeof (coro);
		558
		559	if (coro->mainstack)
		560	{
		561	if (coro->flags & CF_RUNNING)
588	{	562	{
589	/*FIXME*//*D*//* reasonable stack size! */	563	#define VAR(name,type)coro->name = PL_ ## name;
590	stack->ssize = -4096 * sizeof (long);	564	# include "state.h"
591	New (0, stack->sptr, 4096, long);	565	#undef VAR
592	}	566	}
593	}
594	else
595	stack->sptr = 0;
596		567
597	ctx->stack = stack;	568	rss += sizeof (coro->curstackinfo);
598	}	569	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		570	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		571	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		572	rss += coro->tmps_max * sizeof (SV *);
		573	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		574	rss += coro->scopestack_max * sizeof (I32);
		575	rss += coro->savestack_max * sizeof (ANY);
599		576
600	static void	577	#if !PERL_VERSION_ATLEAST (5,9,0)
601	deallocate_stack (Coro__State ctx)	578	rss += coro->retstack_max * sizeof (OP *);
602	{	579	#endif
603	coro_stack *stack = ctx->stack;
604
605	ctx->stack = 0;
606
607	if (stack)
608	{	580	}
609	if (!--stack->refcnt)
610	{
611	#ifdef HAVE_MMAP
612	if (stack->ssize > 0 && stack->sptr)
613	munmap (stack->sptr, stack->ssize);
614	else
615	#endif
616	Safefree (stack->sptr);
617		581
618	Safefree (stack);	582	return rss;
619	}
620	else if (ctx->gencnt == stack->gencnt)
621	--stack->usecnt;
622	}
623	}	583	}
624		584
		585	/** coroutine stack handling ************************************************/
		586
625	static void	587	static void
626	setup_coro (void *arg)	588	setup_coro (pTHX_ struct coro *coro)
627	{	589	{
628	/*	590	/*
629	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
630	*/	592	*/
		593	coro_init_stacks (aTHX);
		594
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	{
		604	dSP;
		605	LOGOP myop;
		606
		607	SvREFCNT_dec (GvAV (PL_defgv));
		608	GvAV (PL_defgv) = coro->args; coro->args = 0;
		609
		610	Zero (&myop, 1, LOGOP);
		611	myop.op_next = Nullop;
		612	myop.op_flags = OPf_WANT_VOID;
		613
		614	PUSHMARK (SP);
		615	XPUSHs (av_shift (GvAV (PL_defgv)));
		616	PUTBACK;
		617	PL_op = (OP *)&myop;
		618	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		619	SPAGAIN;
		620	}
		621
		622	ENTER; /* necessary e.g. for dounwind */
		623	}
		624
		625	static void
		626	free_coro_mortal (pTHX)
		627	{
		628	if (coro_mortal)
		629	{
		630	SvREFCNT_dec (coro_mortal);
		631	coro_mortal = 0;
		632	}
		633	}
		634
		635	static void
		636	do_trace (pTHX)
		637	{
		638	if (PL_curcop != &PL_compiling)
		639	{
		640	runops_proc_t old_runops = PL_runops;
		641	dSP;
		642	ENTER;
		643	SAVETMPS;
		644	PUSHMARK (SP);
		645	PUTBACK;
		646	PL_runops = RUNOPS_DEFAULT;
		647	call_pv ("Coro::_do_trace", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD | G_NOARGS);
		648	PL_runops = old_runops;
		649	SPAGAIN;
		650	FREETMPS;
		651	LEAVE;
		652	PUTBACK;
		653	}
		654	}
		655
		656	static int
		657	runops_coro (pTHX)
		658	{
		659	COP *oldcop = 0;
		660
		661	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		662	{
		663	PERL_ASYNC_CHECK ();
		664
		665	if (oldcop != PL_curcop)
		666	{
		667	oldcop = PL_curcop;
		668	do_trace (aTHX);
		669	}
		670	}
		671
		672	TAINT_NOT;
		673	return 0;
		674	}
		675
		676	/* inject a fake call to Coro::State::_cctx_init into the execution */
		677	/* _cctx_init should be careful, as it could be called at almost any time */
		678	/* during execution of a perl program */
		679	static void NOINLINE
		680	prepare_cctx (pTHX_ coro_cctx *cctx)
		681	{
631	dSP;	682	dSP;
632	Coro__State ctx = (Coro__State)arg;	683	LOGOP myop;
633	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
634		684
635	coro_init_stacks (aTHX);	685	PL_top_env = &PL_start_env;
636	/*PL_curcop = 0;*/
637	/*PL_in_eval = PL_in_eval;*/ /* inherit */
638	SvREFCNT_dec (GvAV (PL_defgv));
639	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
640		686
		687	if (cctx->flags & CC_TRACE)
		688	PL_runops = runops_coro;
		689
		690	Zero (&myop, 1, LOGOP);
		691	myop.op_next = PL_op;
		692	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		693
		694	PUSHMARK (SP);
		695	EXTEND (SP, 2);
		696	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		697	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		698	PUTBACK;
		699	PL_op = (OP *)&myop;
		700	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
641	SPAGAIN;	701	SPAGAIN;
		702	}
642		703
643	if (ctx->stack)	704	/*
644	{	705	* this is a _very_ stripped down perl interpreter ;)
645	ctx->cursp = 0;	706	*/
		707	static void
		708	coro_run (void *arg)
		709	{
		710	dTHX;
646		711
647	PUSHMARK(SP);	712	/* coro_run is the alternative tail of transfer(), so unlock here. */
648	PUTBACK;	713	UNLOCK;
649	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
650		714
651	if (SvTRUE (ERRSV))	715	/* we now skip the entersub that lead to transfer() */
652	croak (NULL);	716	PL_op = PL_op->op_next;
653	else	717
654	croak ("FATAL: CCTXT coroutine returned!");	718	/* inject a fake subroutine call to cctx_init */
		719	prepare_cctx (aTHX_ (coro_cctx *)arg);
		720
		721	/* somebody or something will hit me for both perl_run and PL_restartop */
		722	PL_restartop = PL_op;
		723	perl_run (PL_curinterp);
		724
		725	/*
		726	* If perl-run returns we assume exit() was being called or the coro
		727	* fell off the end, which seems to be the only valid (non-bug)
		728	* reason for perl_run to return. We try to exit by jumping to the
		729	* bootstrap-time "top" top_env, as we cannot restore the "main"
		730	* coroutine as Coro has no such concept
		731	*/
		732	PL_top_env = main_top_env;
		733	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		734	}
		735
		736	static coro_cctx *
		737	cctx_new ()
		738	{
		739	coro_cctx *cctx;
		740	void *stack_start;
		741	size_t stack_size;
		742
		743	++cctx_count;
		744
		745	Newz (0, cctx, 1, coro_cctx);
		746
		747	#if HAVE_MMAP
		748
		749	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		750	/* mmap supposedly does allocate-on-write for us */
		751	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		752
		753	if (cctx->sptr != (void *)-1)
		754	{
		755	# if CORO_STACKGUARD
		756	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		757	# endif
		758	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		759	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		760	cctx->flags |= CC_MAPPED;
655	}	761	}
656	else	762	else
657	{	763	#endif
658	UNOP myop;
659
660	PL_op = (OP *)&myop;
661
662	Zero(&myop, 1, UNOP);
663	myop.op_next = Nullop;
664	myop.op_flags = OPf_WANT_VOID;
665
666	PUSHMARK(SP);
667	XPUSHs (sub_init);
668	/*
669	* the next line is slightly wrong, as PL_op->op_next
670	* is actually being executed so we skip the first op.
671	* that doesn't matter, though, since it is only
672	* pp_nextstate and we never return...
673	* ah yes, and I don't care anyways ;)
674	*/
675	PUTBACK;
676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
677	SPAGAIN;
678
679	ENTER; /* necessary e.g. for dounwind */
680	}	764	{
681	}	765	cctx->ssize = coro_stacksize * (long)sizeof (long);
		766	New (0, cctx->sptr, coro_stacksize, long);
682		767
683	static void	768	if (!cctx->sptr)
684	continue_coro (void *arg)	769	{
685	{	770	perror ("FATAL: unable to allocate stack for coroutine");
686	/*	771	_exit (EXIT_FAILURE);
687	* this is a _very_ stripped down perl interpreter ;)	772	}
688	*/
689	Coro__State ctx = (Coro__State)arg;
690	JMPENV coro_start_env;
691		773
692	PL_top_env = &ctx->start_env;	774	stack_start = cctx->sptr;
		775	stack_size = cctx->ssize;
		776	}
693		777
694	ctx->cursp = 0;	778	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
695	PL_op = PL_op->op_next;	779	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
696	CALLRUNOPS(aTHX);
697		780
698	abort ();	781	return cctx;
699	}	782	}
700		783
701	STATIC void	784	static void
		785	cctx_destroy (coro_cctx *cctx)
		786	{
		787	if (!cctx)
		788	return;
		789
		790	--cctx_count;
		791
		792	#if CORO_USE_VALGRIND
		793	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		794	#endif
		795
		796	#if HAVE_MMAP
		797	if (cctx->flags & CC_MAPPED)
		798	munmap (cctx->sptr, cctx->ssize);
		799	else
		800	#endif
		801	Safefree (cctx->sptr);
		802
		803	Safefree (cctx);
		804	}
		805
		806	static coro_cctx *
		807	cctx_get (pTHX)
		808	{
		809	while (cctx_first)
		810	{
		811	coro_cctx *cctx = cctx_first;
		812	cctx_first = cctx->next;
		813	--cctx_idle;
		814
		815	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		816	return cctx;
		817
		818	cctx_destroy (cctx);
		819	}
		820
		821	return cctx_new ();
		822	}
		823
		824	static void
		825	cctx_put (coro_cctx *cctx)
		826	{
		827	/* free another cctx if overlimit */
		828	if (cctx_idle >= MAX_IDLE_CCTX)
		829	{
		830	coro_cctx *first = cctx_first;
		831	cctx_first = first->next;
		832	--cctx_idle;
		833
		834	cctx_destroy (first);
		835	}
		836
		837	++cctx_idle;
		838	cctx->next = cctx_first;
		839	cctx_first = cctx;
		840	}
		841
		842	/** coroutine switching *****************************************************/
		843
		844	/* never call directly, always through the coro_state_transfer global variable */
		845	static void NOINLINE
702	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	846	transfer (pTHX_ struct coro *prev, struct coro *next)
703	{	847	{
704	dSTACKLEVEL;	848	dSTACKLEVEL;
705	static struct coro *xnext;
706		849
		850	/* sometimes transfer is only called to set idle_sp */
		851	if (!next)
		852	{
		853	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		854	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		855	}
707	if (prev != next)	856	else if (prev != next)
708	{	857	{
709	xnext = next;	858	coro_cctx *prev__cctx;
710		859
711	if (next->mainstack)	860	if (prev->flags & CF_NEW)
712	{	861	{
713	SAVE (prev, flags);	862	/* create a new empty context */
714	LOAD (next);	863	Newz (0, prev->cctx, 1, coro_cctx);
715		864	prev->flags &= ~CF_NEW;
716	/* mark this state as in-use */	865	prev->flags |= CF_RUNNING;
717	next->mainstack = 0;
718	next->tmps_ix = -2;
719
720	/* stacklevel changed? if yes, grab the stack for us! */
721	if (flags & TRANSFER_SAVE_CCTXT)
722	{
723	if (!prev->stack)
724	allocate_stack (prev, 0);
725	else if (prev->cursp != stacklevel
726	&& prev->stack->usecnt > 1)
727	{
728	prev->gencnt = ++prev->stack->gencnt;
729	prev->stack->usecnt = 1;
730	}
731
732	/* has our stack been invalidated? */
733	if (next->stack && next->stack->gencnt != next->gencnt)
734	{
735	deallocate_stack (next);
736	allocate_stack (next, 1);
737	coro_create (&(next->stack->cctx),
738	continue_coro, (void *)next,
739	next->stack->sptr, labs (next->stack->ssize));
740	}
741
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745
746	}	866	}
747	else if (next->tmps_ix == -2)	867
748	croak ("tried to transfer to running coroutine");	868	/*TODO: must not croak here */
		869	if (!prev->flags & CF_RUNNING)
		870	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		871
		872	if (next->flags & CF_RUNNING)
		873	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		874
		875	if (next->flags & CF_DESTROYED)
		876	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		877
		878	prev->flags &= ~CF_RUNNING;
		879	next->flags |= CF_RUNNING;
		880
		881	LOCK;
		882
		883	if (next->flags & CF_NEW)
		884	{
		885	/* need to start coroutine */
		886	next->flags &= ~CF_NEW;
		887	/* first get rid of the old state */
		888	save_perl (aTHX_ prev);
		889	/* setup coroutine call */
		890	setup_coro (aTHX_ next);
		891	}
749	else	892	else
750	{	893	{
751	SAVE (prev, -1); /* first get rid of the old state */	894	/* coroutine already started */
752		895	save_perl (aTHX_ prev);
753	if (flags & TRANSFER_SAVE_CCTXT)	896	load_perl (aTHX_ next);
754	{
755	if (!prev->stack)
756	allocate_stack (prev, 0);
757
758	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
759	{
760	PL_top_env = &next->start_env;
761
762	setup_coro (next);
763
764	prev->stack->refcnt++;
765	prev->stack->usecnt++;
766	next->stack = prev->stack;
767	next->gencnt = prev->gencnt;
768	}
769	else
770	{
771	assert (!next->stack);
772	allocate_stack (next, 1);
773	coro_create (&(next->stack->cctx),
774	setup_coro, (void *)next,
775	next->stack->sptr, labs (next->stack->ssize));
776	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
777	/* don't add any code here */
778	}
779	}
780	else
781	setup_coro (next);
782	}	897	}
783		898
784	/*	899	prev__cctx = prev->cctx;
785	* xnext is now either prev or next, depending on wether	900
786	* we switched the c stack or not. that's why I use a global	901	/* possibly "free" the cctx */
787	* variable, that should become thread-specific at one point.	902	if (prev__cctx->idle_sp == STACKLEVEL)
788	*/	903	{
789	xnext->cursp = stacklevel;	904	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
790	}	905	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
791		906
792	if (coro_mortal)	907	prev->cctx = 0;
		908
		909	cctx_put (prev__cctx);
		910	}
		911
		912	if (!next->cctx)
		913	next->cctx = cctx_get (aTHX);
		914
		915	if (prev__cctx != next->cctx)
		916	{
		917	prev__cctx->top_env = PL_top_env;
		918	PL_top_env = next->cctx->top_env;
		919	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		920	}
		921
		922	free_coro_mortal (aTHX);
		923	UNLOCK;
793	{	924	}
794	SvREFCNT_dec (coro_mortal);	925	}
795	coro_mortal = 0;	926
		927	struct transfer_args
		928	{
		929	struct coro *prev, *next;
		930	};
		931
		932	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		933
		934	/** high level stuff ********************************************************/
		935
		936	static int
		937	coro_state_destroy (pTHX_ struct coro *coro)
		938	{
		939	if (coro->flags & CF_DESTROYED)
		940	return 0;
		941
		942	coro->flags |= CF_DESTROYED;
		943
		944	if (coro->flags & CF_READY)
796	}	945	{
797	}	946	/* reduce nready, as destroying a ready coro effectively unreadies it */
		947	/* alternative: look through all ready queues and remove the coro */
		948	LOCK;
		949	--coro_nready;
		950	UNLOCK;
		951	}
		952	else
		953	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
798		954
799	#define SV_CORO(sv,func) \	955	if (coro->mainstack && coro->mainstack != main_mainstack)
800	do { \	956	{
801	if (SvROK (sv)) \	957	struct coro temp;
802	sv = SvRV (sv); \
803	\
804	if (SvTYPE(sv) == SVt_PVHV) \
805	{ \
806	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
807	\
808	if (!he) \
809	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
810	\
811	(sv) = SvRV (HeVAL(he)); \
812	} \
813	\
814	/* must also be changed inside Coro::Cont::yield */ \
815	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
816	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
817	\
818	} while(0)
819		958
820	#define SvSTATE(sv) (struct coro *)SvIV (sv)	959	assert (!(coro->flags & CF_RUNNING));
821		960
		961	Zero (&temp, 1, struct coro);
		962	temp.save = CORO_SAVE_ALL;
		963
		964	if (coro->flags & CF_RUNNING)
		965	croak ("FATAL: tried to destroy currently running coroutine");
		966
		967	save_perl (aTHX_ &temp);
		968	load_perl (aTHX_ coro);
		969
		970	coro_destroy_stacks (aTHX);
		971
		972	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		973
		974	coro->mainstack = 0;
		975	}
		976
		977	cctx_destroy (coro->cctx);
		978	SvREFCNT_dec (coro->args);
		979
		980	if (coro->next) coro->next->prev = coro->prev;
		981	if (coro->prev) coro->prev->next = coro->next;
		982	if (coro == coro_first) coro_first = coro->next;
		983
		984	return 1;
		985	}
		986
822	static void	987	static int
		988	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		989	{
		990	struct coro *coro = (struct coro *)mg->mg_ptr;
		991	mg->mg_ptr = 0;
		992
		993	coro->hv = 0;
		994
		995	if (--coro->refcnt < 0)
		996	{
		997	coro_state_destroy (aTHX_ coro);
		998	Safefree (coro);
		999	}
		1000
		1001	return 0;
		1002	}
		1003
		1004	static int
		1005	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1006	{
		1007	struct coro *coro = (struct coro *)mg->mg_ptr;
		1008
		1009	++coro->refcnt;
		1010
		1011	return 0;
		1012	}
		1013
		1014	static MGVTBL coro_state_vtbl = {
		1015	0, 0, 0, 0,
		1016	coro_state_free,
		1017	0,
		1018	#ifdef MGf_DUP
		1019	coro_state_dup,
		1020	#else
		1021	# define MGf_DUP 0
		1022	#endif
		1023	};
		1024
		1025	static struct coro *
		1026	SvSTATE_ (pTHX_ SV *coro)
		1027	{
		1028	HV *stash;
		1029	MAGIC *mg;
		1030
		1031	if (SvROK (coro))
		1032	coro = SvRV (coro);
		1033
		1034	stash = SvSTASH (coro);
		1035	if (stash != coro_stash && stash != coro_state_stash)
		1036	{
		1037	/* very slow, but rare, check */
		1038	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		1039	croak ("Coro::State object required");
		1040	}
		1041
		1042	mg = CORO_MAGIC (coro);
		1043	return (struct coro *)mg->mg_ptr;
		1044	}
		1045
		1046	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1047
		1048	static void
		1049	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1050	{
		1051	ta->prev = SvSTATE (prev_sv);
		1052	ta->next = SvSTATE (next_sv);
		1053	}
		1054
		1055	static void
823	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1056	api_transfer (SV *prev_sv, SV *next_sv)
824	{	1057	{
825	SV_CORO (prev, "Coro::transfer");	1058	dTHX;
826	SV_CORO (next, "Coro::transfer");	1059	struct transfer_args ta;
827		1060
828	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1061	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1062	TRANSFER (ta);
		1063	}
		1064
		1065	static int
		1066	api_save (SV *coro_sv, int new_save)
		1067	{
		1068	dTHX;
		1069	struct coro *coro = SvSTATE (coro_sv);
		1070	int old_save = coro->save;
		1071
		1072	if (new_save >= 0)
		1073	coro->save = new_save;
		1074
		1075	return old_save;
829	}	1076	}
830		1077
831	/** Coro ********************************************************************/	1078	/** Coro ********************************************************************/
832		1079
833	#define PRIO_MAX 3
834	#define PRIO_HIGH 1
835	#define PRIO_NORMAL 0
836	#define PRIO_LOW -1
837	#define PRIO_IDLE -3
838	#define PRIO_MIN -4
839
840	/* for Coro.pm */
841	static GV *coro_current, *coro_idle;
842	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
843	static int coro_nready;
844
845	static void	1080	static void
846	coro_enq (SV *sv)	1081	coro_enq (pTHX_ SV *coro_sv)
847	{	1082	{
848	if (SvTYPE (sv) == SVt_PVHV)
849	{
850	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
851	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
852
853	prio = prio > PRIO_MAX ? PRIO_MAX
854	: prio < PRIO_MIN ? PRIO_MIN
855	: prio;
856
857	av_push (coro_ready [prio - PRIO_MIN], sv);	1083	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
858	coro_nready++;
859
860	return;
861	}
862
863	croak ("Coro::ready tried to enqueue something that is not a coroutine");
864	}	1084	}
865		1085
866	static SV *	1086	static SV *
867	coro_deq (int min_prio)	1087	coro_deq (pTHX_ int min_prio)
868	{	1088	{
869	int prio = PRIO_MAX - PRIO_MIN;	1089	int prio = PRIO_MAX - PRIO_MIN;
870		1090
871	min_prio -= PRIO_MIN;	1091	min_prio -= PRIO_MIN;
872	if (min_prio < 0)	1092	if (min_prio < 0)
873	min_prio = 0;	1093	min_prio = 0;
874		1094
875	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1095	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
876	if (av_len (coro_ready[prio]) >= 0)	1096	if (AvFILLp (coro_ready [prio]) >= 0)
877	{
878	coro_nready--;
879	return av_shift (coro_ready[prio]);	1097	return av_shift (coro_ready [prio]);
880	}
881		1098
882	return 0;	1099	return 0;
883	}	1100	}
884		1101
885	static void	1102	static int
886	api_ready (SV *coro)	1103	api_ready (SV *coro_sv)
887	{	1104	{
		1105	dTHX;
		1106	struct coro *coro;
		1107
888	if (SvROK (coro))	1108	if (SvROK (coro_sv))
889	coro = SvRV (coro);	1109	coro_sv = SvRV (coro_sv);
890		1110
		1111	coro = SvSTATE (coro_sv);
		1112
		1113	if (coro->flags & CF_READY)
		1114	return 0;
		1115
		1116	coro->flags |= CF_READY;
		1117
		1118	LOCK;
891	coro_enq (SvREFCNT_inc (coro));	1119	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1120	++coro_nready;
		1121	UNLOCK;
		1122
		1123	return 1;
		1124	}
		1125
		1126	static int
		1127	api_is_ready (SV *coro_sv)
		1128	{
		1129	dTHX;
		1130	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1131	}
		1132
		1133	static void
		1134	prepare_schedule (pTHX_ struct transfer_args *ta)
		1135	{
		1136	SV *prev_sv, *next_sv;
		1137
		1138	for (;;)
		1139	{
		1140	LOCK;
		1141	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1142
		1143	/* nothing to schedule: call the idle handler */
		1144	if (!next_sv)
		1145	{
		1146	dSP;
		1147	UNLOCK;
		1148
		1149	ENTER;
		1150	SAVETMPS;
		1151
		1152	PUSHMARK (SP);
		1153	PUTBACK;
		1154	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1155
		1156	FREETMPS;
		1157	LEAVE;
		1158	continue;
		1159	}
		1160
		1161	ta->next = SvSTATE (next_sv);
		1162
		1163	/* cannot transfer to destroyed coros, skip and look for next */
		1164	if (ta->next->flags & CF_DESTROYED)
		1165	{
		1166	UNLOCK;
		1167	SvREFCNT_dec (next_sv);
		1168	/* coro_nready is already taken care of by destroy */
		1169	continue;
		1170	}
		1171
		1172	--coro_nready;
		1173	UNLOCK;
		1174	break;
		1175	}
		1176
		1177	/* free this only after the transfer */
		1178	prev_sv = SvRV (coro_current);
		1179	SvRV_set (coro_current, next_sv);
		1180	ta->prev = SvSTATE (prev_sv);
		1181
		1182	assert (ta->next->flags & CF_READY);
		1183	ta->next->flags &= ~CF_READY;
		1184
		1185	LOCK;
		1186	free_coro_mortal (aTHX);
		1187	coro_mortal = prev_sv;
		1188	UNLOCK;
		1189	}
		1190
		1191	static void
		1192	prepare_cede (pTHX_ struct transfer_args *ta)
		1193	{
		1194	api_ready (coro_current);
		1195	prepare_schedule (aTHX_ ta);
		1196	}
		1197
		1198	static int
		1199	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1200	{
		1201	if (coro_nready)
		1202	{
		1203	SV *prev = SvRV (coro_current);
		1204	prepare_schedule (aTHX_ ta);
		1205	api_ready (prev);
		1206	return 1;
		1207	}
		1208	else
		1209	return 0;
892	}	1210	}
893		1211
894	static void	1212	static void
895	api_schedule (void)	1213	api_schedule (void)
896	{	1214	{
897	SV *prev, *next;	1215	dTHX;
		1216	struct transfer_args ta;
898		1217
899	prev = SvRV (GvSV (coro_current));	1218	prepare_schedule (aTHX_ &ta);
900	next = coro_deq (PRIO_MIN);	1219	TRANSFER (ta);
901
902	if (!next)
903	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
904
905	/* free this only after the transfer */
906	coro_mortal = prev;
907	SV_CORO (prev, "Coro::schedule");
908
909	SvRV (GvSV (coro_current)) = next;
910
911	SV_CORO (next, "Coro::schedule");
912
913	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
914	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
915	}	1220	}
916		1221
917	static void	1222	static int
918	api_cede (void)	1223	api_cede (void)
919	{	1224	{
920	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1225	dTHX;
		1226	struct transfer_args ta;
921		1227
922	api_schedule ();	1228	prepare_cede (aTHX_ &ta);
		1229
		1230	if (ta.prev != ta.next)
		1231	{
		1232	TRANSFER (ta);
		1233	return 1;
		1234	}
		1235	else
		1236	return 0;
		1237	}
		1238
		1239	static int
		1240	api_cede_notself (void)
		1241	{
		1242	dTHX;
		1243	struct transfer_args ta;
		1244
		1245	if (prepare_cede_notself (aTHX_ &ta))
		1246	{
		1247	TRANSFER (ta);
		1248	return 1;
		1249	}
		1250	else
		1251	return 0;
923	}	1252	}
924		1253
925	MODULE = Coro::State PACKAGE = Coro::State	1254	MODULE = Coro::State PACKAGE = Coro::State
926		1255
927	PROTOTYPES: ENABLE	1256	PROTOTYPES: DISABLE
928		1257
929	BOOT:	1258	BOOT:
930	{ /* {} necessary for stoopid perl-5.6.x */	1259	{
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1260	#ifdef USE_ITHREADS
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1261	MUTEX_INIT (&coro_mutex);
		1262	#endif
		1263	BOOT_PAGESIZE;
		1264
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1265	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		1266
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1267	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1268	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1269	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1270	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1271	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1272	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
939		1273	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
940	if (!padlist_cache)
941	padlist_cache = newHV ();
942		1274
943	main_mainstack = PL_mainstack;	1275	main_mainstack = PL_mainstack;
		1276	main_top_env = PL_top_env;
		1277
		1278	while (main_top_env->je_prev)
		1279	main_top_env = main_top_env->je_prev;
944		1280
945	coroapi.ver = CORO_API_VERSION;	1281	coroapi.ver = CORO_API_VERSION;
946	coroapi.transfer = api_transfer;	1282	coroapi.transfer = api_transfer;
947	}
948		1283
949	Coro::State	1284	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
950	_newprocess(args)	1285	}
951	SV * args	1286
952	PROTOTYPE: $	1287	SV *
		1288	new (char *klass, ...)
953	CODE:	1289	CODE:
954	Coro__State coro;	1290	{
		1291	struct coro *coro;
		1292	HV *hv;
		1293	int i;
955		1294
956	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
957	croak ("Coro::State::_newprocess expects an arrayref");
958
959	Newz (0, coro, 1, struct coro);	1295	Newz (0, coro, 1, struct coro);
		1296	coro->args = newAV ();
		1297	coro->save = CORO_SAVE_DEF;
		1298	coro->flags = CF_NEW;
960		1299
961	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1300	if (coro_first) coro_first->prev = coro;
962	coro->mainstack = 0; /* actual work is done inside transfer */	1301	coro->next = coro_first;
963	coro->stack = 0;	1302	coro_first = coro;
964		1303
965	/* same as JMPENV_BOOTSTRAP */	1304	coro->hv = hv = newHV ();
966	/* we might be able to recycle start_env, but safe is safe */	1305	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
967	//Zero(&coro->start_env, 1, JMPENV);	1306	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
968	coro->start_env.je_ret = -1;
969	coro->start_env.je_mustcatch = TRUE;
970		1307
971	RETVAL = coro;	1308	for (i = 1; i < items; i++)
		1309	av_push (coro->args, newSVsv (ST (i)));
		1310	}
972	OUTPUT:	1311	OUTPUT:
973	RETVAL	1312	RETVAL
974		1313
		1314	int
		1315	save (SV *coro, int new_save = -1)
		1316	CODE:
		1317	RETVAL = api_save (coro, new_save);
		1318	OUTPUT:
		1319	RETVAL
		1320
		1321	int
		1322	save_also (SV *coro_sv, int save_also)
		1323	CODE:
		1324	{
		1325	struct coro *coro = SvSTATE (coro_sv);
		1326	RETVAL = coro->save;
		1327	coro->save |= save_also;
		1328	}
		1329	OUTPUT:
		1330	RETVAL
		1331
975	void	1332	void
976	transfer(prev, next, flags)	1333	_set_stacklevel (...)
977	SV *prev	1334	ALIAS:
978	SV *next	1335	Coro::State::transfer = 1
979	int flags	1336	Coro::schedule = 2
980	PROTOTYPE: @	1337	Coro::cede = 3
		1338	Coro::cede_notself = 4
981	CODE:	1339	CODE:
982	PUTBACK;	1340	{
983	SV_CORO (next, "Coro::transfer");	1341	struct transfer_args ta;
984	SV_CORO (prev, "Coro::transfer");	1342
985	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1343	switch (ix)
986	SPAGAIN;	1344	{
		1345	case 0:
		1346	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1347	ta.next = 0;
		1348	break;
		1349
		1350	case 1:
		1351	if (items != 2)
		1352	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1353
		1354	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1355	break;
		1356
		1357	case 2:
		1358	prepare_schedule (aTHX_ &ta);
		1359	break;
		1360
		1361	case 3:
		1362	prepare_cede (aTHX_ &ta);
		1363	break;
		1364
		1365	case 4:
		1366	if (!prepare_cede_notself (aTHX_ &ta))
		1367	XSRETURN_EMPTY;
		1368
		1369	break;
		1370	}
		1371
		1372	BARRIER;
		1373	TRANSFER (ta);
		1374
		1375	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1376	XSRETURN_YES;
		1377	}
		1378
		1379	bool
		1380	_destroy (SV *coro_sv)
		1381	CODE:
		1382	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1383	OUTPUT:
		1384	RETVAL
987		1385
988	void	1386	void
989	DESTROY(coro)
990	Coro::State coro
991	CODE:
992
993	if (coro->mainstack && coro->mainstack != main_mainstack)
994	{
995	struct coro temp;
996
997	PUTBACK;
998	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
999	LOAD(aTHX_ coro);
1000	SPAGAIN;
1001
1002	destroy_stacks (aTHX);
1003
1004	LOAD((&temp)); /* this will get rid of defsv etc.. */
1005	SPAGAIN;
1006
1007	coro->mainstack = 0;
1008	}
1009
1010	deallocate_stack (coro);
1011	SvREFCNT_dec (coro->args);
1012	Safefree (coro);
1013
1014	void
1015	flush()
1016	CODE:
1017	#ifdef MAY_FLUSH
1018	flush_padlist_cache ();
1019	#endif
1020
1021	void
1022	_exit(code)	1387	_exit (code)
1023	int code	1388	int code
1024	PROTOTYPE: $	1389	PROTOTYPE: $
1025	CODE:	1390	CODE:
1026	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1027	_exit (code);	1391	_exit (code);
1028	#else
1029	signal (SIGTERM, SIG_DFL);
1030	raise (SIGTERM);
1031	exit (code);
1032	#endif
1033		1392
1034	MODULE = Coro::State PACKAGE = Coro::Cont	1393	int
		1394	cctx_stacksize (int new_stacksize = 0)
		1395	CODE:
		1396	RETVAL = coro_stacksize;
		1397	if (new_stacksize)
		1398	coro_stacksize = new_stacksize;
		1399	OUTPUT:
		1400	RETVAL
1035		1401
1036	# this is slightly dirty (should expose a c-level api)	1402	int
		1403	cctx_count ()
		1404	CODE:
		1405	RETVAL = cctx_count;
		1406	OUTPUT:
		1407	RETVAL
		1408
		1409	int
		1410	cctx_idle ()
		1411	CODE:
		1412	RETVAL = cctx_idle;
		1413	OUTPUT:
		1414	RETVAL
1037		1415
1038	void	1416	void
1039	yield(...)	1417	list ()
1040	PROTOTYPE: @	1418	PPCODE:
		1419	{
		1420	struct coro *coro;
		1421	for (coro = coro_first; coro; coro = coro->next)
		1422	if (coro->hv)
		1423	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1424	}
		1425
		1426	void
		1427	call (Coro::State coro, SV *coderef)
		1428	ALIAS:
		1429	eval = 1
		1430	CODE:
		1431	{
		1432	if (coro->mainstack)
		1433	{
		1434	struct coro temp;
		1435	Zero (&temp, 1, struct coro);
		1436	temp.save = CORO_SAVE_ALL;
		1437
		1438	if (!(coro->flags & CF_RUNNING))
		1439	{
		1440	save_perl (aTHX_ &temp);
		1441	load_perl (aTHX_ coro);
		1442	}
		1443
		1444	{
		1445	dSP;
		1446	ENTER;
		1447	SAVETMPS;
		1448	PUSHMARK (SP);
		1449	PUTBACK;
		1450	if (ix)
		1451	eval_sv (coderef, 0);
		1452	else
		1453	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1454	SPAGAIN;
		1455	FREETMPS;
		1456	LEAVE;
		1457	PUTBACK;
		1458	}
		1459
		1460	if (!(coro->flags & CF_RUNNING))
		1461	{
		1462	save_perl (aTHX_ coro);
		1463	load_perl (aTHX_ &temp);
		1464	}
		1465	}
		1466	}
		1467
		1468	SV *
		1469	is_ready (Coro::State coro)
		1470	PROTOTYPE: $
		1471	ALIAS:
		1472	is_ready = CF_READY
		1473	is_running = CF_RUNNING
		1474	is_new = CF_NEW
		1475	is_destroyed = CF_DESTROYED
		1476	CODE:
		1477	RETVAL = boolSV (coro->flags & ix);
		1478	OUTPUT:
		1479	RETVAL
		1480
		1481	void
		1482	trace (Coro::State coro, int enable = 0)
		1483	CODE:
		1484	if (enable)
		1485	{
		1486	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1487	XSRETURN_EMPTY;
		1488
		1489	if (coro->flags & CF_RUNNING)
		1490	croak ("cannot enable tracing on running coroutine");
		1491
		1492	if (coro->cctx)
		1493	croak ("cannot enable tracing on coroutine with custom stack");
		1494
		1495	coro->cctx = cctx_new ();
		1496	coro->cctx->flags |= CC_TRACE;
		1497	}
		1498	else
		1499	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1500	{
		1501	coro->cctx->flags &= ~CC_TRACE;
		1502	coro->cctx->flags |= CC_NOREUSE;
		1503	}
		1504
		1505	SV *
		1506	has_stack (Coro::State coro)
		1507	PROTOTYPE: $
		1508	CODE:
		1509	RETVAL = boolSV (!!coro->cctx);
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	IV
		1514	rss (Coro::State coro)
		1515	PROTOTYPE: $
1041	CODE:	1516	CODE:
1042	static SV *returnstk;	1517	RETVAL = coro_rss (coro);
1043	SV *sv;	1518	OUTPUT:
1044	AV *defav = GvAV (PL_defgv);	1519	RETVAL
1045	struct coro *prev, *next;
1046		1520
1047	if (!returnstk)
1048	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1049
1050	/* set up @_ -- ugly */
1051	av_clear (defav);
1052	av_fill (defav, items - 1);
1053	while (items--)
1054	av_store (defav, items, SvREFCNT_inc (ST(items)));
1055
1056	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1057	sv = av_pop ((AV *)SvRV (returnstk));
1058	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1059	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1060	SvREFCNT_dec (sv);
1061
1062	transfer(aTHX_ prev, next, 0);
1063		1521
1064	MODULE = Coro::State PACKAGE = Coro	1522	MODULE = Coro::State PACKAGE = Coro
1065		1523
1066	# this is slightly dirty (should expose a c-level api)
1067
1068	BOOT:	1524	BOOT:
1069	{	1525	{
1070	int i;	1526	int i;
		1527
		1528	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1529	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1530	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1531
		1532	coro_current = get_sv ("Coro::current", FALSE);
		1533	SvREADONLY_on (coro_current);
		1534
1071	HV *stash = gv_stashpv ("Coro", TRUE);	1535	coro_stash = gv_stashpv ("Coro", TRUE);
1072		1536
1073	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1537	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1074	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1538	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1075	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1539	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1076	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1540	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1077	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1541	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1078	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1542	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1079
1080	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1081	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1082		1543
1083	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1544	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1084	coro_ready[i] = newAV ();	1545	coro_ready[i] = newAV ();
1085		1546
1086	{	1547	{
1087	SV *sv = perl_get_sv("Coro::API", 1);	1548	SV *sv = perl_get_sv("Coro::API", 1);
1088		1549
1089	coroapi.schedule = api_schedule;	1550	coroapi.schedule = api_schedule;
		1551	coroapi.save = api_save;
1090	coroapi.cede = api_cede;	1552	coroapi.cede = api_cede;
		1553	coroapi.cede_notself = api_cede_notself;
1091	coroapi.ready = api_ready;	1554	coroapi.ready = api_ready;
		1555	coroapi.is_ready = api_is_ready;
1092	coroapi.nready = &coro_nready;	1556	coroapi.nready = &coro_nready;
1093	coroapi.current = coro_current;	1557	coroapi.current = coro_current;
1094		1558
1095	GCoroAPI = &coroapi;	1559	GCoroAPI = &coroapi;
1096	sv_setiv(sv, (IV)&coroapi);	1560	sv_setiv (sv, (IV)&coroapi);
1097	SvREADONLY_on(sv);	1561	SvREADONLY_on (sv);
1098	}	1562	}
1099	}	1563	}
1100		1564
1101	void	1565	void
1102	ready(self)	1566	_set_current (SV *current)
1103	SV * self
1104	PROTOTYPE: $	1567	PROTOTYPE: $
1105	CODE:	1568	CODE:
1106	api_ready (self);	1569	SvREFCNT_dec (SvRV (coro_current));
		1570	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1107		1571
1108	int	1572	int
		1573	prio (Coro::State coro, int newprio = 0)
		1574	ALIAS:
		1575	nice = 1
		1576	CODE:
		1577	{
		1578	RETVAL = coro->prio;
		1579
		1580	if (items > 1)
		1581	{
		1582	if (ix)
		1583	newprio = coro->prio - newprio;
		1584
		1585	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1586	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1587
		1588	coro->prio = newprio;
		1589	}
		1590	}
		1591	OUTPUT:
		1592	RETVAL
		1593
		1594	SV *
		1595	ready (SV *self)
		1596	PROTOTYPE: $
		1597	CODE:
		1598	RETVAL = boolSV (api_ready (self));
		1599	OUTPUT:
		1600	RETVAL
		1601
		1602	int
1109	nready(...)	1603	nready (...)
1110	PROTOTYPE:	1604	PROTOTYPE:
1111	CODE:	1605	CODE:
1112	RETVAL = coro_nready;	1606	RETVAL = coro_nready;
1113	OUTPUT:	1607	OUTPUT:
1114	RETVAL	1608	RETVAL
1115		1609
		1610	# for async_pool speedup
1116	void	1611	void
1117	schedule(...)	1612	_pool_1 (SV *cb)
1118	PROTOTYPE:
1119	CODE:	1613	CODE:
1120	api_schedule ();	1614	{
		1615	int i, len;
		1616	HV *hv = (HV *)SvRV (coro_current);
		1617	AV *defav = GvAV (PL_defgv);
		1618	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1619	AV *invoke_av;
		1620
		1621	if (!invoke)
		1622	croak ("\3terminate\2\n");
		1623
		1624	hv_store (hv, "desc", sizeof ("desc") - 1,
		1625	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1626
		1627	invoke_av = (AV *)SvRV (invoke);
		1628	len = av_len (invoke_av);
		1629
		1630	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1631
		1632	if (len > 0)
		1633	{
		1634	av_fill (defav, len - 1);
		1635	for (i = 0; i < len; ++i)
		1636	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1637	}
		1638
		1639	SvREFCNT_dec (invoke);
		1640	}
1121		1641
1122	void	1642	void
1123	cede(...)	1643	_pool_2 (SV *cb)
1124	PROTOTYPE:
1125	CODE:	1644	CODE:
1126	api_cede ();	1645	{
		1646	struct coro *coro = SvSTATE (coro_current);
1127		1647
		1648	sv_setsv (cb, &PL_sv_undef);
		1649
		1650	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1651	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1652	croak ("\3terminate\2\n");
		1653
		1654	av_clear (GvAV (PL_defgv));
		1655	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1656	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1657	coro->save = CORO_SAVE_DEF;
		1658	coro->prio = 0;
		1659	av_push (av_async_pool, newSVsv (coro_current));
		1660	}
		1661
		1662
		1663	MODULE = Coro::State PACKAGE = Coro::AIO
		1664
		1665	SV *
		1666	_get_state ()
		1667	CODE:
		1668	{
		1669	struct io_state *data;
		1670
		1671	RETVAL = newSV (sizeof (struct io_state));
		1672	data = (struct io_state *)SvPVX (RETVAL);
		1673	SvCUR_set (RETVAL, sizeof (struct io_state));
		1674	SvPOK_only (RETVAL);
		1675
		1676	data->errorno = errno;
		1677	data->laststype = PL_laststype;
		1678	data->laststatval = PL_laststatval;
		1679	data->statcache = PL_statcache;
		1680	}
		1681	OUTPUT:
		1682	RETVAL
		1683
		1684	void
		1685	_set_state (char *data_)
		1686	PROTOTYPE: $
		1687	CODE:
		1688	{
		1689	struct io_state *data = (void *)data_;
		1690
		1691	errno = data->errorno;
		1692	PL_laststype = data->laststype;
		1693	PL_laststatval = data->laststatval;
		1694	PL_statcache = data->statcache;
		1695	}
		1696

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