[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.18 by root, Thu Jul 26 03:46:15 2001 UTC vs.
Revision 1.169 by root, Thu Sep 27 16:25:10 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"
		10
		11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
6		14
7	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
8	# include <unistd.h>	16	# include <unistd.h>
9	# include <sys/mman.h>	17	# include <sys/mman.h>
10	# ifndef MAP_ANON
11	# ifdef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
12	# define MAP_ANON MAP_ANONYMOUS	19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
13	# else	21	# else
14	# undef HAVE_MMAP	22	# undef HAVE_MMAP
15	# endif	23	# endif
16	# 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
17	#endif	32	# endif
18
19	#define MAY_FLUSH /* increases codesize */
20
21	/* perl-related */
22	#define TRANSFER_SAVE_DEFAV 0x00000001
23	#define TRANSFER_SAVE_DEFSV 0x00000002
24	#define TRANSFER_SAVE_ERRSV 0x00000004
25	/* c-related */
26	#define TRANSFER_SAVE_CCTXT 0x00000008
27	#ifdef CORO_LAZY_STACK
28	# define TRANSFER_LAZY_STACK 0x00000010
29	#else	33	#else
30	# define TRANSFER_LAZY_STACK 0x00000000	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)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
31	#endif	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
32		74
33	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV\|TRANSFER_SAVE_DEFSV \	75	/* 5.8.7 */
34	\|TRANSFER_SAVE_ERRSV\|TRANSFER_SAVE_CCTXT)	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
35		79
36	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
37	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
38		83
39	/* The next macro should delcare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
40	* to the current C stack pointer. It's property is that it changes with each call	85	# define CORO_STACKGUARD 0
41	* and should be unique. */	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
42	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
43		97
44	#define labs(l) ((l) >= 0 ? (l) : -(l))	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
45		99
46	/* this is actually not only the c stack but also c registers etc... */	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))
		109
		110	#include "CoroAPI.h"
		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;
		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 */
		136
		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_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		152	};
		153
		154	/* this is a structure representing a c-level coroutine */
47	typedef struct {	155	typedef struct coro_cctx {
48	int refcnt; /* pointer reference counter */	156	struct coro_cctx *next;
49	int usecnt; /* shared by how many coroutines */
50	int gencnt; /* generation counter */
51		157
		158	/* the stack */
		159	void *sptr;
		160	size_t ssize;
		161
		162	/* cpu state */
		163	void idle_sp; / sp of top-level transfer/schedule/cede call */
		164	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		165	JMPENV *top_env;
52	coro_context cctx;	166	coro_context cctx;
53		167
54	void *sptr;	168	#if CORO_USE_VALGRIND
55	long ssize; /* positive == mmap, otherwise malloc */	169	int valgrind_id;
56	} coro_stack;	170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
57		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
		180
		181	/* this is a structure representing a perl-level coroutine */
58	struct coro {	182	struct coro {
59	/* the optional C context */	183	/* the c coroutine allocated to this perl coroutine, if any */
60	coro_stack *stack;	184	coro_cctx *cctx;
61	void *cursp;
62	int gencnt;
63
64	/* optionally saved, might be zero */
65	AV *defav;
66	SV *defsv;
67	SV *errsv;
68
69	/* saved global state not related to stacks */
70	U8 dowarn;
71
72	/* the stacks and related info (callchain etc..) */
73	PERL_SI *curstackinfo;
74	AV *curstack;
75	AV *mainstack;
76	SV **stack_sp;
77	OP *op;
78	SV **curpad;
79	SV **stack_base;
80	SV **stack_max;
81	SV **tmps_stack;
82	I32 tmps_floor;
83	I32 tmps_ix;
84	I32 tmps_max;
85	I32 *markstack;
86	I32 *markstack_ptr;
87	I32 *markstack_max;
88	I32 *scopestack;
89	I32 scopestack_ix;
90	I32 scopestack_max;
91	ANY *savestack;
92	I32 savestack_ix;
93	I32 savestack_max;
94	OP **retstack;
95	I32 retstack_ix;
96	I32 retstack_max;
97	COP *curcop;
98	JMPENV start_env;
99	JMPENV *top_env;
100		185
101	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
102	AV *args;	187	AV *args;
		188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
		191
		192	/* optionally saved, might be zero */
		193	AV defav; / @_ */
		194	SV defsv; / $_ */
		195	SV errsv; / $@ */
		196	GV deffh; / default filehandle */
		197	SV irssv; / $/ */
		198	SV irssv_sv; / real $/ cache */
		199
		200	#define VAR(name,type) type name;
		201	# include "state.h"
		202	#undef VAR
		203
		204	/* coro process data */
		205	int prio;
		206
		207	/* linked list */
		208	struct coro next, prev;
		209	HV hv; / the perl hash associated with this coro, if any */
103	};	210	};
104		211
105	typedef struct coro *Coro__State;	212	typedef struct coro *Coro__State;
106	typedef struct coro *Coro__State_or_hashref;	213	typedef struct coro *Coro__State_or_hashref;
107		214
108	static AV main_mainstack; / used to differentiate between $main and others */	215	/ Coro ******************************************************************/
109	static HV *coro_state_stash;
110	static SV *ucoro_state_sv;
111	static U32 ucoro_state_hash;
112	static HV *padlist_cache;
113		216
114	/* mostly copied from op.c:cv_clone2 */	217	#define PRIO_MAX 3
115	STATIC AV *	218	#define PRIO_HIGH 1
116	clone_padlist (AV *protopadlist)	219	#define PRIO_NORMAL 0
		220	#define PRIO_LOW -1
		221	#define PRIO_IDLE -3
		222	#define PRIO_MIN -4
		223
		224	/* for Coro.pm */
		225	static SV *coro_current;
		226	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		227	static int coro_nready;
		228	static struct coro *coro_first;
		229
		230	/ lowlevel stuff ********************************************************/
		231
		232	static AV *
		233	coro_clone_padlist (pTHX_ CV *cv)
117	{	234	{
118	AV *av;	235	AV *padlist = CvPADLIST (cv);
119	I32 ix;
120	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
121	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
122	SV **pname = AvARRAY (protopad_name);
123	SV **ppad = AvARRAY (protopad);
124	I32 fname = AvFILLp (protopad_name);
125	I32 fpad = AvFILLp (protopad);
126	AV newpadlist, newpad_name, *newpad;	236	AV newpadlist, newpad;
127	SV **npad;
128
129	newpad_name = newAV ();
130	for (ix = fname; ix >= 0; ix--)
131	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
132
133	newpad = newAV ();
134	av_fill (newpad, AvFILLp (protopad));
135	npad = AvARRAY (newpad);
136		237
137	newpadlist = newAV ();	238	newpadlist = newAV ();
138	AvREAL_off (newpadlist);	239	AvREAL_off (newpadlist);
139	av_store (newpadlist, 0, (SV *) newpad_name);	240	#if PERL_VERSION_ATLEAST (5,9,0)
		241	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		242	#else
		243	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		244	#endif
		245	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		246	--AvFILLp (padlist);
		247
		248	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
140	av_store (newpadlist, 1, (SV *) newpad);	249	av_store (newpadlist, 1, (SV *)newpad);
141		250
142	av = newAV (); /* will be @_ */	251	return newpadlist;
143	av_extend (av, 0);	252	}
144	av_store (newpad, 0, (SV *) av);
145	AvFLAGS (av) = AVf_REIFY;
146		253
147	for (ix = fpad; ix > 0; ix--)	254	static void
		255	free_padlist (pTHX_ AV *padlist)
		256	{
		257	/* may be during global destruction */
		258	if (SvREFCNT (padlist))
148	{	259	{
149	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	260	I32 i = AvFILLp (padlist);
150	if (namesv && namesv != &PL_sv_undef)	261	while (i >= 0)
151	{	262	{
152	char name = SvPVX (namesv); / XXX */	263	SV **svp = av_fetch (padlist, i--, FALSE);
153	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	264	if (svp)
154	{ /* lexical from outside? */
155	npad[ix] = SvREFCNT_inc (ppad[ix]);
156	}	265	{
157	else
158	{ /* our own lexical */
159	SV *sv;	266	SV *sv;
160	if (*name == '&')	267	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
161	sv = SvREFCNT_inc (ppad[ix]);	268	SvREFCNT_dec (sv);
162	else if (*name == '@')	269
163	sv = (SV *) newAV ();	270	SvREFCNT_dec (*svp);
164	else if (*name == '%')
165	sv = (SV *) newHV ();
166	else
167	sv = NEWSV (0, 0);
168	if (!SvPADBUSY (sv))
169	SvPADMY_on (sv);
170	npad[ix] = sv;
171	}	271	}
172	}	272	}
173	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	273
		274	SvREFCNT_dec ((SV*)padlist);
		275	}
		276	}
		277
		278	static int
		279	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		280	{
		281	AV *padlist;
		282	AV av = (AV )mg->mg_obj;
		283
		284	/* casting is fun. */
		285	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		286	free_padlist (aTHX_ padlist);
		287
		288	SvREFCNT_dec (av);
		289
		290	return 0;
		291	}
		292
		293	#define PERL_MAGIC_coro PERL_MAGIC_ext
		294
		295	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		296
		297	#define CORO_MAGIC(cv) \
		298	SvMAGIC (cv) \
		299	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		300	? SvMAGIC (cv) \
		301	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		302	: 0
		303
		304	static struct coro *
		305	SvSTATE_ (pTHX_ SV *coro)
		306	{
		307	HV *stash;
		308	MAGIC *mg;
		309
		310	if (SvROK (coro))
		311	coro = SvRV (coro);
		312
		313	stash = SvSTASH (coro);
		314	if (stash != coro_stash && stash != coro_state_stash)
		315	{
		316	/* very slow, but rare, check */
		317	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		318	croak ("Coro::State object required");
		319	}
		320
		321	mg = CORO_MAGIC (coro);
		322	return (struct coro *)mg->mg_ptr;
		323	}
		324
		325	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		326
		327	/* the next two functions merely cache the padlists */
		328	static void
		329	get_padlist (pTHX_ CV *cv)
		330	{
		331	MAGIC *mg = CORO_MAGIC (cv);
		332	AV *av;
		333
		334	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		335	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		336	else
		337	{
		338	#if CORO_PREFER_PERL_FUNCTIONS
		339	/* this is probably cleaner, but also slower? */
		340	CV *cp = Perl_cv_clone (cv);
		341	CvPADLIST (cv) = CvPADLIST (cp);
		342	CvPADLIST (cp) = 0;
		343	SvREFCNT_dec (cp);
		344	#else
		345	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		346	#endif
		347	}
		348	}
		349
		350	static void
		351	put_padlist (pTHX_ CV *cv)
		352	{
		353	MAGIC *mg = CORO_MAGIC (cv);
		354	AV *av;
		355
		356	if (!mg)
		357	{
		358	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		359	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		360	mg->mg_virtual = &vtbl_coro;
		361	mg->mg_obj = (SV *)newAV ();
		362	}
		363
		364	av = (AV *)mg->mg_obj;
		365
		366	if (AvFILLp (av) >= AvMAX (av))
		367	av_extend (av, AvMAX (av) + 1);
		368
		369	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		370	}
		371
		372	/ load & save, init *****************************************************/
		373
		374	#define SB do {
		375	#define SE } while (0)
		376
		377	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
		378
		379	static void
		380	load_perl (pTHX_ Coro__State c)
		381	{
		382	#define VAR(name,type) PL_ ## name = c->name;
		383	# include "state.h"
		384	#undef VAR
		385
		386	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		387	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		388	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		389	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		390
		391	if (c->irssv)
		392	{
		393	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
174	{	394	{
175	npad[ix] = SvREFCNT_inc (ppad[ix]);	395	SvREFCNT_dec (c->irssv);
		396	c->irssv = 0;
176	}	397	}
177	else	398	else
178	{	399	{
179	SV *sv = NEWSV (0, 0);	400	REPLACE_SV (PL_rs, c->irssv);
180	SvPADTMP_on (sv);	401	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
181	npad[ix] = sv;	402	sv_setsv (c->irssv_sv, PL_rs);
182	}	403	}
183	}	404	}
184
185	#if 0 /* return -ENOTUNDERSTOOD */
186	/* Now that vars are all in place, clone nested closures. */
187
188	for (ix = fpad; ix > 0; ix--) {
189	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
190	if (namesv
191	&& namesv != &PL_sv_undef
192	&& !(SvFLAGS(namesv) & SVf_FAKE)
193	&& *SvPVX(namesv) == '&'
194	&& CvCLONE(ppad[ix]))
195	{
196	CV kid = cv_clone((CV)ppad[ix]);
197	SvREFCNT_dec(ppad[ix]);
198	CvCLONE_on(kid);
199	SvPADMY_on(kid);
200	npad[ix] = (SV*)kid;
201	}
202	}
203	#endif
204
205	return newpadlist;
206	}
207
208	#ifdef MAY_FLUSH
209	STATIC AV *
210	free_padlist (AV *padlist)
211	{
212	/* may be during global destruction */
213	if (SvREFCNT(padlist))
214	{
215	I32 i = AvFILLp(padlist);
216	while (i >= 0)
217	{
218	SV **svp = av_fetch(padlist, i--, FALSE);
219	SV sv = svp ? svp : Nullsv;
220	if (sv)
221	SvREFCNT_dec(sv);
222	}
223
224	SvREFCNT_dec((SV*)padlist);
225	}
226	}
227	#endif
228
229	/* the next two functions merely cache the padlists */
230	STATIC void
231	get_padlist (CV *cv)
232	{
233	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
234
235	if (he && AvFILLp ((AV )he) >= 0)
236	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
237	else
238	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
239	}
240
241	STATIC void
242	put_padlist (CV *cv)
243	{
244	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
245
246	if (SvTYPE (*he) != SVt_PVAV)
247	{
248	SvREFCNT_dec (*he);
249	he = (SV )newAV ();
250	}
251
252	av_push ((AV )he, (SV *)CvPADLIST (cv));
253	}
254
255	#ifdef MAY_FLUSH
256	STATIC void
257	flush_padlist_cache ()
258	{
259	HV *hv = padlist_cache;
260	padlist_cache = newHV ();
261
262	if (hv_iterinit (hv))
263	{
264	HE *he;
265	AV *padlist;
266
267	while (!!(he = hv_iternext (hv)))
268	{
269	AV av = (AV )HeVAL(he);
270
271	/* casting is fun. */
272	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
273	free_padlist (padlist);
274	}
275	}
276
277	SvREFCNT_dec (hv);
278	}
279	#endif
280
281	#define SB do {
282	#define SE } while (0)
283
284	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
285	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
286
287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
288
289	static void
290	load_state(pTHX_ Coro__State c)
291	{
292	PL_dowarn = c->dowarn;
293
294	PL_curstackinfo = c->curstackinfo;
295	PL_curstack = c->curstack;
296	PL_mainstack = c->mainstack;
297	PL_stack_sp = c->stack_sp;
298	PL_op = c->op;
299	PL_curpad = c->curpad;
300	PL_stack_base = c->stack_base;
301	PL_stack_max = c->stack_max;
302	PL_tmps_stack = c->tmps_stack;
303	PL_tmps_floor = c->tmps_floor;
304	PL_tmps_ix = c->tmps_ix;
305	PL_tmps_max = c->tmps_max;
306	PL_markstack = c->markstack;
307	PL_markstack_ptr = c->markstack_ptr;
308	PL_markstack_max = c->markstack_max;
309	PL_scopestack = c->scopestack;
310	PL_scopestack_ix = c->scopestack_ix;
311	PL_scopestack_max = c->scopestack_max;
312	PL_savestack = c->savestack;
313	PL_savestack_ix = c->savestack_ix;
314	PL_savestack_max = c->savestack_max;
315	PL_retstack = c->retstack;
316	PL_retstack_ix = c->retstack_ix;
317	PL_retstack_max = c->retstack_max;
318	PL_curcop = c->curcop;
319	PL_start_env = c->start_env;
320	PL_top_env = c->top_env;
321
322	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
323	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
324	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
325		405
326	{	406	{
327	dSP;	407	dSP;
328	CV *cv;	408	CV *cv;
329		409
330	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
331	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
332	{	412	{
333	AV padlist = (AV )POPs;
334
335	if (padlist)
336	{
337	put_padlist (cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
338	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
339	#ifdef USE_THREADS	415	CvPADLIST (cv) = (AV *)POPs;
340	/CvOWNER(cv) = (struct perl_thread )POPs;*/
341	#endif
342	}
343
344	++CvDEPTH(cv);
345	}	416	}
346		417
347	PUTBACK;	418	PUTBACK;
348	}	419	}
349	}	420	}
350		421
351	static void	422	static void
352	save_state(pTHX_ Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
353	{	424	{
354	{	425	{
355	dSP;	426	dSP;
356	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
357	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
360	/*	431	/*
361	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
362	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
363	*/	434	*/
364		435
365	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
366	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
367	for (;;)	438	for (;;)
368	{	439	{
369	do	440	while (cxix >= 0)
370	{	441	{
371	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
372		443
373	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
374	{	445	{
375	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
376	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
377	{	449	{
378	#ifdef USE_THREADS
379	/XPUSHs ((SV )CvOWNER(cv));*/
380	/CvOWNER(cv) = 0;/
381	/error must unlock this cv etc.. etc.../
382	#endif
383	EXTEND (SP, CvDEPTH(cv)*2);	450	EXTEND (SP, 3);
384
385	while (--CvDEPTH(cv))
386	{
387	/* this tells the restore code to increment CvDEPTH */
388	PUSHs (Nullsv);
389	PUSHs ((SV *)cv);
390	}
391
392	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
393	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
394		454
395	get_padlist (cv); /* this is a monster */	455	CvDEPTH (cv) = 0;
		456	get_padlist (aTHX_ cv);
396	}	457	}
397	}	458	}
398	else if (CxTYPE(cx) == CXt_FORMAT)
399	{
400	/* I never used formats, so how should I know how these are implemented? */
401	/* my bold guess is as a simple, plain sub... */
402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403	}
404	}	459	}
405	while (cxix >= 0);
406		460
407	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
408	break;	462	break;
409		463
410	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
411	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
412	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
413	}	467	}
414		468
415	PUTBACK;	469	PUTBACK;
416	}	470	}
417		471
418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
420	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		475	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		476	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
421		477
422	/* I have not the slightest idea of why av_reify is necessary */	478	#define VAR(name,type)c->name = PL_ ## name;
423	/* but if it's missing the defav contents magically get replaced sometimes */	479	# include "state.h"
424	if (c->defav)	480	#undef VAR
425	av_reify (c->defav);
426
427	c->dowarn = PL_dowarn;
428
429	c->curstackinfo = PL_curstackinfo;
430	c->curstack = PL_curstack;
431	c->mainstack = PL_mainstack;
432	c->stack_sp = PL_stack_sp;
433	c->op = PL_op;
434	c->curpad = PL_curpad;
435	c->stack_base = PL_stack_base;
436	c->stack_max = PL_stack_max;
437	c->tmps_stack = PL_tmps_stack;
438	c->tmps_floor = PL_tmps_floor;
439	c->tmps_ix = PL_tmps_ix;
440	c->tmps_max = PL_tmps_max;
441	c->markstack = PL_markstack;
442	c->markstack_ptr = PL_markstack_ptr;
443	c->markstack_max = PL_markstack_max;
444	c->scopestack = PL_scopestack;
445	c->scopestack_ix = PL_scopestack_ix;
446	c->scopestack_max = PL_scopestack_max;
447	c->savestack = PL_savestack;
448	c->savestack_ix = PL_savestack_ix;
449	c->savestack_max = PL_savestack_max;
450	c->retstack = PL_retstack;
451	c->retstack_ix = PL_retstack_ix;
452	c->retstack_max = PL_retstack_max;
453	c->curcop = PL_curcop;
454	c->start_env = PL_start_env;
455	c->top_env = PL_top_env;
456	}	481	}
457		482
458	/*	483	/*
459	* allocate various perl stacks. This is an exact copy	484	* allocate various perl stacks. This is an exact copy
460	* of perl.c:init_stacks, except that it uses less memory	485	* of perl.c:init_stacks, except that it uses less memory
461	* on the assumption that coroutines do not usually need	486	* on the (sometimes correct) assumption that coroutines do
462	* a lot of stackspace.	487	* not usually need a lot of stackspace.
463	*/	488	*/
464	STATIC void	489	#if CORO_PREFER_PERL_FUNCTIONS
		490	# define coro_init_stacks init_stacks
		491	#else
		492	static void
465	coro_init_stacks (pTHX)	493	coro_init_stacks (pTHX)
466	{	494	{
467	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	495	PL_curstackinfo = new_stackinfo(64, 6);
468	PL_curstackinfo->si_type = PERLSI_MAIN;	496	PL_curstackinfo->si_type = PERLSI_MAIN;
469	PL_curstack = PL_curstackinfo->si_stack;	497	PL_curstack = PL_curstackinfo->si_stack;
470	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	498	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
471		499
472	PL_stack_base = AvARRAY(PL_curstack);	500	PL_stack_base = AvARRAY(PL_curstack);
473	PL_stack_sp = PL_stack_base;	501	PL_stack_sp = PL_stack_base;
474	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	502	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
475		503
476	New(50,PL_tmps_stack,96,SV*);	504	New(50,PL_tmps_stack,64,SV*);
477	PL_tmps_floor = -1;	505	PL_tmps_floor = -1;
478	PL_tmps_ix = -1;	506	PL_tmps_ix = -1;
479	PL_tmps_max = 96;	507	PL_tmps_max = 64;
480		508
481	New(54,PL_markstack,16,I32);	509	New(54,PL_markstack,16,I32);
482	PL_markstack_ptr = PL_markstack;	510	PL_markstack_ptr = PL_markstack;
483	PL_markstack_max = PL_markstack + 16;	511	PL_markstack_max = PL_markstack + 16;
484		512
		513	#ifdef SET_MARK_OFFSET
485	SET_MARK_OFFSET;	514	SET_MARK_OFFSET;
		515	#endif
486		516
487	New(54,PL_scopestack,16,I32);	517	New(54,PL_scopestack,16,I32);
488	PL_scopestack_ix = 0;	518	PL_scopestack_ix = 0;
489	PL_scopestack_max = 16;	519	PL_scopestack_max = 16;
490		520
491	New(54,PL_savestack,96,ANY);	521	New(54,PL_savestack,64,ANY);
492	PL_savestack_ix = 0;	522	PL_savestack_ix = 0;
493	PL_savestack_max = 96;	523	PL_savestack_max = 64;
494		524
		525	#if !PERL_VERSION_ATLEAST (5,9,0)
495	New(54,PL_retstack,8,OP*);	526	New(54,PL_retstack,4,OP*);
496	PL_retstack_ix = 0;	527	PL_retstack_ix = 0;
497	PL_retstack_max = 8;	528	PL_retstack_max = 4;
		529	#endif
498	}	530	}
		531	#endif
499		532
500	/*	533	/*
501	* destroy the stacks, the callchain etc...	534	* destroy the stacks, the callchain etc...
502	* still there is a memleak of 128 bytes...
503	*/	535	*/
504	STATIC void	536	static void
505	destroy_stacks(pTHX)	537	coro_destroy_stacks (pTHX)
506	{	538	{
507	/* is this ugly, I ask? */	539	if (!IN_DESTRUCT)
508	while (PL_scopestack_ix)	540	{
509	LEAVE;	541	/* restore all saved variables and stuff */
		542	LEAVE_SCOPE (0);
		543	assert (PL_tmps_floor == -1);
510		544
511	/* sure it is, but more important: is it correct?? :/ */	545	/* free all temporaries */
512	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
513	FREETMPS;	546	FREETMPS;
		547	assert (PL_tmps_ix == -1);
		548
		549	/* unwind all extra stacks */
		550	POPSTACK_TO (PL_mainstack);
		551
		552	/* unwind main stack */
		553	dounwind (-1);
		554	}
514		555
515	while (PL_curstackinfo->si_next)	556	while (PL_curstackinfo->si_next)
516	PL_curstackinfo = PL_curstackinfo->si_next;	557	PL_curstackinfo = PL_curstackinfo->si_next;
517		558
518	while (PL_curstackinfo)	559	while (PL_curstackinfo)
519	{	560	{
520	PERL_SI *p = PL_curstackinfo->si_prev;	561	PERL_SI *p = PL_curstackinfo->si_prev;
521		562
522	{	563	if (!IN_DESTRUCT)
523	dSP;
524	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
525	PUTBACK; /* possibly superfluous */
526	}
527
528	dounwind(-1);
529
530	SvREFCNT_dec(PL_curstackinfo->si_stack);	564	SvREFCNT_dec (PL_curstackinfo->si_stack);
		565
531	Safefree(PL_curstackinfo->si_cxstack);	566	Safefree (PL_curstackinfo->si_cxstack);
532	Safefree(PL_curstackinfo);	567	Safefree (PL_curstackinfo);
533	PL_curstackinfo = p;	568	PL_curstackinfo = p;
534	}	569	}
535		570
536	Safefree(PL_tmps_stack);	571	Safefree (PL_tmps_stack);
537	Safefree(PL_markstack);	572	Safefree (PL_markstack);
538	Safefree(PL_scopestack);	573	Safefree (PL_scopestack);
539	Safefree(PL_savestack);	574	Safefree (PL_savestack);
		575	#if !PERL_VERSION_ATLEAST (5,9,0)
540	Safefree(PL_retstack);	576	Safefree (PL_retstack);
		577	#endif
541	}	578	}
		579
		580	static size_t
		581	coro_rss (struct coro *coro)
		582	{
		583	size_t rss = sizeof (coro);
		584
		585	if (coro->mainstack)
		586	{
		587	if (coro->flags & CF_RUNNING)
		588	{
		589	#define VAR(name,type)coro->name = PL_ ## name;
		590	# include "state.h"
		591	#undef VAR
		592	}
		593
		594	rss += sizeof (coro->curstackinfo);
		595	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		596	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		597	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		598	rss += coro->tmps_max * sizeof (SV *);
		599	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		600	rss += coro->scopestack_max * sizeof (I32);
		601	rss += coro->savestack_max * sizeof (ANY);
		602
		603	#if !PERL_VERSION_ATLEAST (5,9,0)
		604	rss += coro->retstack_max * sizeof (OP *);
		605	#endif
		606	}
		607
		608	return rss;
		609	}
		610
		611	/ coroutine stack handling **********************************************/
542		612
543	static void	613	static void
544	allocate_stack (Coro__State ctx, int alloc)	614	setup_coro (pTHX_ struct coro *coro)
545	{
546	coro_stack *stack;
547
548	New (0, stack, 1, coro_stack);
549
550	stack->refcnt = 1;
551	stack->usecnt = 1;
552	stack->gencnt = ctx->gencnt = 0;
553	if (alloc)
554	{
555	#ifdef HAVE_MMAP
556	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
558	if (stack->sptr == (void *)-1)
559	#endif
560	{
561	/FIXME//D//* reasonable stack size! */
562	stack->ssize = -4096 * sizeof (long);
563	New (0, stack->sptr, 4096, long);
564	}
565	}
566	else
567	stack->sptr = 0;
568
569	ctx->stack = stack;
570	}
571
572	static void
573	deallocate_stack (Coro__State ctx)
574	{
575	coro_stack *stack = ctx->stack;
576
577	ctx->stack = 0;
578
579	if (stack)
580	{
581	if (!--stack->refcnt)
582	{
583	#ifdef HAVE_MMAP
584	if (stack->ssize > 0 && stack->sptr)
585	munmap (stack->sptr, stack->ssize);
586	else
587	#else
588	Safefree (stack->sptr);
589	#endif
590	Safefree (stack);
591	}
592	else if (ctx->gencnt == stack->gencnt)
593	--stack->usecnt;
594	}
595	}
596
597	static void
598	setup_coro (void *arg)
599	{	615	{
600	/*	616	/*
601	* emulate part of the perl startup here.	617	* emulate part of the perl startup here.
602	*/	618	*/
		619	coro_init_stacks (aTHX);
		620
		621	PL_runops = RUNOPS_DEFAULT;
		622	PL_curcop = &PL_compiling;
		623	PL_in_eval = EVAL_NULL;
		624	PL_comppad = 0;
		625	PL_curpm = 0;
		626	PL_localizing = 0;
		627	PL_dirty = 0;
		628	PL_restartop = 0;
		629
		630	{
		631	dSP;
		632	LOGOP myop;
		633
		634	SvREFCNT_dec (GvAV (PL_defgv));
		635	GvAV (PL_defgv) = coro->args; coro->args = 0;
		636
		637	Zero (&myop, 1, LOGOP);
		638	myop.op_next = Nullop;
		639	myop.op_flags = OPf_WANT_VOID;
		640
		641	PUSHMARK (SP);
		642	XPUSHs (av_shift (GvAV (PL_defgv)));
		643	PUTBACK;
		644	PL_op = (OP *)&myop;
		645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		646	SPAGAIN;
		647	}
		648
		649	ENTER; /* necessary e.g. for dounwind */
		650	}
		651
		652	static void
		653	free_coro_mortal (pTHX)
		654	{
		655	if (coro_mortal)
		656	{
		657	SvREFCNT_dec (coro_mortal);
		658	coro_mortal = 0;
		659	}
		660	}
		661
		662	static int
		663	runops_trace (pTHX)
		664	{
		665	COP *oldcop = 0;
		666	int oldcxix = -2;
		667	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		668	coro_cctx *cctx = coro->cctx;
		669
		670	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		671	{
		672	PERL_ASYNC_CHECK ();
		673
		674	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		675	{
		676	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		677	SV bot, top;
		678	AV av = newAV (); / return values */
		679	SV **cb;
		680	runops_proc_t old_runops = PL_runops;
		681	dSP;
		682	ENTER;
		683	SAVETMPS;
		684	EXTEND (SP, 3);
		685	PL_runops = RUNOPS_DEFAULT;
		686
		687	GV *gv = CvGV (cx->blk_sub.cv);
		688	SV *fullname = sv_2mortal (newSV (0));
		689	if (isGV (gv))
		690	gv_efullname3 (fullname, gv, 0);
		691
		692	bot = PL_stack_base + cx->blk_oldsp + 1;
		693	top = cx->blk_gimme == G_ARRAY ? SP + 1
		694	: cx->blk_gimme == G_SCALAR ? bot + 1
		695	: bot;
		696
		697	while (bot < top)
		698	av_push (av, SvREFCNT_inc (*bot++));
		699
		700	PUSHMARK (SP);
		701	PUSHs (&PL_sv_no);
		702	PUSHs (fullname);
		703	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		704	PUTBACK;
		705	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		706	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		707	SPAGAIN;
		708
		709	FREETMPS;
		710	LEAVE;
		711	PL_runops = old_runops;
		712	}
		713
		714	if (oldcop != PL_curcop)
		715	{
		716	oldcop = PL_curcop;
		717
		718	if (PL_curcop != &PL_compiling)
		719	{
		720	SV **cb;
		721	runops_proc_t old_runops = PL_runops;
		722	dSP;
		723	ENTER;
		724	SAVETMPS;
		725	EXTEND (SP, 3);
		726	PL_runops = RUNOPS_DEFAULT;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	GV *gv = CvGV (cx->blk_sub.cv);
		735	SV *fullname = sv_2mortal (newSV (0));
		736	if (isGV (gv))
		737	gv_efullname3 (fullname, gv, 0);
		738
		739	PUSHMARK (SP);
		740	PUSHs (&PL_sv_yes);
		741	PUSHs (fullname);
		742	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		743	PUTBACK;
		744	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		745	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		746	SPAGAIN;
		747	}
		748
		749	oldcxix = cxstack_ix;
		750	}
		751
		752	if (cctx->flags & CC_TRACE_LINE)
		753	{
		754	PUSHMARK (SP);
		755	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		756	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		757	PUTBACK;
		758	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		759	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		760	SPAGAIN;
		761	}
		762
		763	FREETMPS;
		764	LEAVE;
		765	PL_runops = old_runops;
		766	}
		767	}
		768	}
		769
		770	TAINT_NOT;
		771	return 0;
		772	}
		773
		774	/* inject a fake call to Coro::State::_cctx_init into the execution */
		775	/* _cctx_init should be careful, as it could be called at almost any time */
		776	/* during execution of a perl program */
		777	static void NOINLINE
		778	prepare_cctx (pTHX_ coro_cctx *cctx)
		779	{
603	dSP;	780	dSP;
604	Coro__State ctx = (Coro__State)arg;	781	LOGOP myop;
605	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
606		782
607	coro_init_stacks (aTHX);	783	PL_top_env = &PL_start_env;
608	JMPENV_BOOTSTRAP;	784
		785	if (cctx->flags & CC_TRACE)
		786	PL_runops = runops_trace;
		787
		788	Zero (&myop, 1, LOGOP);
		789	myop.op_next = PL_op;
		790	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		791
		792	PUSHMARK (SP);
		793	EXTEND (SP, 2);
		794	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		795	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		796	PUTBACK;
		797	PL_op = (OP *)&myop;
		798	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
609	SPAGAIN;	799	SPAGAIN;
		800	}
610		801
611	/PL_curcop = 0;/	802	/*
612	SvREFCNT_dec (GvAV (PL_defgv));	803	* this is a _very_ stripped down perl interpreter ;)
613	GvAV (PL_defgv) = ctx->args;	804	*/
		805	static void
		806	coro_run (void *arg)
		807	{
		808	dTHX;
614		809
615	if (ctx->stack)	810	/* coro_run is the alternative tail of transfer(), so unlock here. */
616	{	811	UNLOCK;
617	ctx->cursp = 0;
618		812
619	PUSHMARK(SP);	813	/* we now skip the entersub that lead to transfer() */
620	PUTBACK;	814	PL_op = PL_op->op_next;
621	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	815
622	croak ("FATAL: CCTXT coroutine returned!");	816	/* inject a fake subroutine call to cctx_init */
		817	prepare_cctx (aTHX_ (coro_cctx *)arg);
		818
		819	/* somebody or something will hit me for both perl_run and PL_restartop */
		820	PL_restartop = PL_op;
		821	perl_run (PL_curinterp);
		822
		823	/*
		824	* If perl-run returns we assume exit() was being called or the coro
		825	* fell off the end, which seems to be the only valid (non-bug)
		826	* reason for perl_run to return. We try to exit by jumping to the
		827	* bootstrap-time "top" top_env, as we cannot restore the "main"
		828	* coroutine as Coro has no such concept
		829	*/
		830	PL_top_env = main_top_env;
		831	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		832	}
		833
		834	static coro_cctx *
		835	cctx_new ()
		836	{
		837	coro_cctx *cctx;
		838	void *stack_start;
		839	size_t stack_size;
		840
		841	++cctx_count;
		842
		843	Newz (0, cctx, 1, coro_cctx);
		844
		845	#if HAVE_MMAP
		846
		847	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		848	/* mmap supposedly does allocate-on-write for us */
		849	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		850
		851	if (cctx->sptr != (void *)-1)
		852	{
		853	# if CORO_STACKGUARD
		854	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		855	# endif
		856	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		857	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		858	cctx->flags \|= CC_MAPPED;
623	}	859	}
624	else	860	else
625	{	861	#endif
626	UNOP myop;
627
628	PL_op = (OP *)&myop;
629
630	Zero(&myop, 1, UNOP);
631	myop.op_next = Nullop;
632	myop.op_flags = OPf_WANT_VOID;
633
634	PUSHMARK(SP);
635	XPUSHs (sub_init);
636	/*
637	* the next line is slightly wrong, as PL_op->op_next
638	* is actually being executed so we skip the first op.
639	* that doesn't matter, though, since it is only
640	* pp_nextstate and we never return...
641	* ah yes, and I don't care anyways ;)
642	*/
643	PUTBACK;
644	PL_op = pp_entersub();
645	SPAGAIN;
646
647	ENTER; /* necessary e.g. for dounwind */
648	}	862	{
		863	cctx->ssize = coro_stacksize * (long)sizeof (long);
		864	New (0, cctx->sptr, coro_stacksize, long);
		865
		866	if (!cctx->sptr)
		867	{
		868	perror ("FATAL: unable to allocate stack for coroutine");
		869	_exit (EXIT_FAILURE);
		870	}
		871
		872	stack_start = cctx->sptr;
		873	stack_size = cctx->ssize;
		874	}
		875
		876	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		877	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		878
		879	return cctx;
649	}	880	}
650		881
651	static void	882	static void
652	continue_coro (void *arg)	883	cctx_destroy (coro_cctx *cctx)
653	{	884	{
654	/*	885	if (!cctx)
655	* this is a _very_ stripped down perl interpreter ;)	886	return;
656	*/
657	Coro__State ctx = (Coro__State)arg;
658		887
659	ctx->cursp = 0;	888	--cctx_count;
660	PL_op = PL_op->op_next;
661	CALLRUNOPS(aTHX);
662	/NORETURN/
663	abort ();
664	}
665		889
666	STATIC void	890	#if CORO_USE_VALGRIND
		891	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		892	#endif
		893
		894	#if HAVE_MMAP
		895	if (cctx->flags & CC_MAPPED)
		896	munmap (cctx->sptr, cctx->ssize);
		897	else
		898	#endif
		899	Safefree (cctx->sptr);
		900
		901	Safefree (cctx);
		902	}
		903
		904	static coro_cctx *
		905	cctx_get (pTHX)
		906	{
		907	while (cctx_first)
		908	{
		909	coro_cctx *cctx = cctx_first;
		910	cctx_first = cctx->next;
		911	--cctx_idle;
		912
		913	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		914	return cctx;
		915
		916	cctx_destroy (cctx);
		917	}
		918
		919	return cctx_new ();
		920	}
		921
		922	static void
		923	cctx_put (coro_cctx *cctx)
		924	{
		925	/* free another cctx if overlimit */
		926	if (cctx_idle >= MAX_IDLE_CCTX)
		927	{
		928	coro_cctx *first = cctx_first;
		929	cctx_first = first->next;
		930	--cctx_idle;
		931
		932	cctx_destroy (first);
		933	}
		934
		935	++cctx_idle;
		936	cctx->next = cctx_first;
		937	cctx_first = cctx;
		938	}
		939
		940	/ coroutine switching ***************************************************/
		941
		942	/* never call directly, always through the coro_state_transfer global variable */
		943	static void NOINLINE
667	transfer(pTHX_ struct coro prev, struct coro next, int flags)	944	transfer (pTHX_ struct coro prev, struct coro next)
668	{	945	{
669	dSP;
670	dSTACKLEVEL;	946	dSTACKLEVEL;
671		947
		948	/* sometimes transfer is only called to set idle_sp */
		949	if (!next)
		950	{
		951	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		952	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		953	}
672	if (prev != next)	954	else if (prev != next)
673	{	955	{
674	if (next->mainstack)	956	coro_cctx *prev__cctx;
		957
		958	if (prev->flags & CF_NEW)
675	{	959	{
676	SAVE (prev, flags);	960	/* create a new empty context */
677	LOAD (next);	961	Newz (0, prev->cctx, 1, coro_cctx);
678		962	prev->flags &= ~CF_NEW;
679	/* mark this state as in-use */	963	prev->flags \|= CF_RUNNING;
680	next->mainstack = 0;
681	next->tmps_ix = -2;
682
683	/* stacklevel changed? if yes, grab the stack for us! */
684	if (flags & TRANSFER_SAVE_CCTXT)
685	{
686	if (!prev->stack)
687	allocate_stack (prev, 0);
688	else if (prev->cursp != stacklevel
689	&& prev->stack->usecnt > 1)
690	{
691	prev->gencnt = ++prev->stack->gencnt;
692	prev->stack->usecnt = 1;
693	}
694
695	/* has our stack been invalidated? */
696	if (next->stack && next->stack->gencnt != next->gencnt)
697	{
698	deallocate_stack (next);
699	allocate_stack (next, 1);
700	coro_create (&(next->stack->cctx),
701	continue_coro, (void *)next,
702	next->stack->sptr, labs (next->stack->ssize));
703	}
704
705	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
706	}
707
708	}	964	}
709	else if (next->tmps_ix == -2)	965
710	croak ("tried to transfer to running coroutine");	966	/TODO: must not croak here /
		967	if (!prev->flags & CF_RUNNING)
		968	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		969
		970	if (next->flags & CF_RUNNING)
		971	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		972
		973	if (next->flags & CF_DESTROYED)
		974	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		975
		976	prev->flags &= ~CF_RUNNING;
		977	next->flags \|= CF_RUNNING;
		978
		979	LOCK;
		980
		981	if (next->flags & CF_NEW)
		982	{
		983	/* need to start coroutine */
		984	next->flags &= ~CF_NEW;
		985	/* first get rid of the old state */
		986	save_perl (aTHX_ prev);
		987	/* setup coroutine call */
		988	setup_coro (aTHX_ next);
		989	}
711	else	990	else
712	{	991	{
713	SAVE (prev, -1); /* first get rid of the old state */	992	/* coroutine already started */
		993	save_perl (aTHX_ prev);
		994	load_perl (aTHX_ next);
		995	}
714		996
715	if (flags & TRANSFER_SAVE_CCTXT)	997	prev__cctx = prev->cctx;
		998
		999	/* possibly "free" the cctx */
		1000	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
		1001	{
		1002	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1003	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1004
		1005	prev->cctx = 0;
		1006
		1007	cctx_put (prev__cctx);
		1008	}
		1009
		1010	if (!next->cctx)
		1011	next->cctx = cctx_get (aTHX);
		1012
		1013	if (prev__cctx != next->cctx)
		1014	{
		1015	prev__cctx->top_env = PL_top_env;
		1016	PL_top_env = next->cctx->top_env;
		1017	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1018	}
		1019
		1020	free_coro_mortal (aTHX);
		1021	UNLOCK;
		1022	}
		1023	}
		1024
		1025	struct transfer_args
		1026	{
		1027	struct coro prev, next;
		1028	};
		1029
		1030	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1031
		1032	/ high level stuff ******************************************************/
		1033
		1034	static int
		1035	coro_state_destroy (pTHX_ struct coro *coro)
		1036	{
		1037	if (coro->flags & CF_DESTROYED)
		1038	return 0;
		1039
		1040	coro->flags \|= CF_DESTROYED;
		1041
		1042	if (coro->flags & CF_READY)
		1043	{
		1044	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1045	/* alternative: look through all ready queues and remove the coro */
		1046	LOCK;
		1047	--coro_nready;
		1048	UNLOCK;
		1049	}
		1050	else
		1051	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1052
		1053	if (coro->mainstack && coro->mainstack != main_mainstack)
		1054	{
		1055	struct coro temp;
		1056
		1057	assert (!(coro->flags & CF_RUNNING));
		1058
		1059	Zero (&temp, 1, struct coro);
		1060	temp.save = CORO_SAVE_ALL;
		1061
		1062	if (coro->flags & CF_RUNNING)
		1063	croak ("FATAL: tried to destroy currently running coroutine");
		1064
		1065	save_perl (aTHX_ &temp);
		1066	load_perl (aTHX_ coro);
		1067
		1068	coro_destroy_stacks (aTHX);
		1069
		1070	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1071
		1072	coro->mainstack = 0;
		1073	}
		1074
		1075	cctx_destroy (coro->cctx);
		1076	SvREFCNT_dec (coro->args);
		1077
		1078	if (coro->next) coro->next->prev = coro->prev;
		1079	if (coro->prev) coro->prev->next = coro->next;
		1080	if (coro == coro_first) coro_first = coro->next;
		1081
		1082	return 1;
		1083	}
		1084
		1085	static int
		1086	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1087	{
		1088	struct coro coro = (struct coro )mg->mg_ptr;
		1089	mg->mg_ptr = 0;
		1090
		1091	coro->hv = 0;
		1092
		1093	if (--coro->refcnt < 0)
		1094	{
		1095	coro_state_destroy (aTHX_ coro);
		1096	Safefree (coro);
		1097	}
		1098
		1099	return 0;
		1100	}
		1101
		1102	static int
		1103	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1104	{
		1105	struct coro coro = (struct coro )mg->mg_ptr;
		1106
		1107	++coro->refcnt;
		1108
		1109	return 0;
		1110	}
		1111
		1112	static MGVTBL coro_state_vtbl = {
		1113	0, 0, 0, 0,
		1114	coro_state_free,
		1115	0,
		1116	#ifdef MGf_DUP
		1117	coro_state_dup,
		1118	#else
		1119	# define MGf_DUP 0
		1120	#endif
		1121	};
		1122
		1123	static void
		1124	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1125	{
		1126	ta->prev = SvSTATE (prev_sv);
		1127	ta->next = SvSTATE (next_sv);
		1128	}
		1129
		1130	static void
		1131	api_transfer (SV prev_sv, SV next_sv)
		1132	{
		1133	dTHX;
		1134	struct transfer_args ta;
		1135
		1136	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1137	TRANSFER (ta);
		1138	}
		1139
		1140	static int
		1141	api_save (SV *coro_sv, int new_save)
		1142	{
		1143	dTHX;
		1144	struct coro *coro = SvSTATE (coro_sv);
		1145	int old_save = coro->save;
		1146
		1147	if (new_save >= 0)
		1148	coro->save = new_save;
		1149
		1150	return old_save;
		1151	}
		1152
		1153	/ Coro ******************************************************************/
		1154
		1155	static void
		1156	coro_enq (pTHX_ SV *coro_sv)
		1157	{
		1158	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1159	}
		1160
		1161	static SV *
		1162	coro_deq (pTHX_ int min_prio)
		1163	{
		1164	int prio = PRIO_MAX - PRIO_MIN;
		1165
		1166	min_prio -= PRIO_MIN;
		1167	if (min_prio < 0)
		1168	min_prio = 0;
		1169
		1170	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1171	if (AvFILLp (coro_ready [prio]) >= 0)
		1172	return av_shift (coro_ready [prio]);
		1173
		1174	return 0;
		1175	}
		1176
		1177	static int
		1178	api_ready (SV *coro_sv)
		1179	{
		1180	dTHX;
		1181	struct coro *coro;
		1182
		1183	if (SvROK (coro_sv))
		1184	coro_sv = SvRV (coro_sv);
		1185
		1186	coro = SvSTATE (coro_sv);
		1187
		1188	if (coro->flags & CF_READY)
		1189	return 0;
		1190
		1191	coro->flags \|= CF_READY;
		1192
		1193	LOCK;
		1194	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1195	++coro_nready;
		1196	UNLOCK;
		1197
		1198	return 1;
		1199	}
		1200
		1201	static int
		1202	api_is_ready (SV *coro_sv)
		1203	{
		1204	dTHX;
		1205	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1206	}
		1207
		1208	static void
		1209	prepare_schedule (pTHX_ struct transfer_args *ta)
		1210	{
		1211	SV prev_sv, next_sv;
		1212
		1213	for (;;)
		1214	{
		1215	LOCK;
		1216	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1217
		1218	/* nothing to schedule: call the idle handler */
		1219	if (!next_sv)
		1220	{
		1221	dSP;
		1222	UNLOCK;
		1223
		1224	ENTER;
		1225	SAVETMPS;
		1226
		1227	PUSHMARK (SP);
		1228	PUTBACK;
		1229	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1230
		1231	FREETMPS;
		1232	LEAVE;
		1233	continue;
		1234	}
		1235
		1236	ta->next = SvSTATE (next_sv);
		1237
		1238	/* cannot transfer to destroyed coros, skip and look for next */
		1239	if (ta->next->flags & CF_DESTROYED)
		1240	{
		1241	UNLOCK;
		1242	SvREFCNT_dec (next_sv);
		1243	/* coro_nready is already taken care of by destroy */
		1244	continue;
		1245	}
		1246
		1247	--coro_nready;
		1248	UNLOCK;
		1249	break;
		1250	}
		1251
		1252	/* free this only after the transfer */
		1253	prev_sv = SvRV (coro_current);
		1254	SvRV_set (coro_current, next_sv);
		1255	ta->prev = SvSTATE (prev_sv);
		1256
		1257	assert (ta->next->flags & CF_READY);
		1258	ta->next->flags &= ~CF_READY;
		1259
		1260	LOCK;
		1261	free_coro_mortal (aTHX);
		1262	coro_mortal = prev_sv;
		1263	UNLOCK;
		1264	}
		1265
		1266	static void
		1267	prepare_cede (pTHX_ struct transfer_args *ta)
		1268	{
		1269	api_ready (coro_current);
		1270	prepare_schedule (aTHX_ ta);
		1271	}
		1272
		1273	static int
		1274	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1275	{
		1276	if (coro_nready)
		1277	{
		1278	SV *prev = SvRV (coro_current);
		1279	prepare_schedule (aTHX_ ta);
		1280	api_ready (prev);
		1281	return 1;
		1282	}
		1283	else
		1284	return 0;
		1285	}
		1286
		1287	static void
		1288	api_schedule (void)
		1289	{
		1290	dTHX;
		1291	struct transfer_args ta;
		1292
		1293	prepare_schedule (aTHX_ &ta);
		1294	TRANSFER (ta);
		1295	}
		1296
		1297	static int
		1298	api_cede (void)
		1299	{
		1300	dTHX;
		1301	struct transfer_args ta;
		1302
		1303	prepare_cede (aTHX_ &ta);
		1304
		1305	if (ta.prev != ta.next)
		1306	{
		1307	TRANSFER (ta);
		1308	return 1;
		1309	}
		1310	else
		1311	return 0;
		1312	}
		1313
		1314	static int
		1315	api_cede_notself (void)
		1316	{
		1317	dTHX;
		1318	struct transfer_args ta;
		1319
		1320	if (prepare_cede_notself (aTHX_ &ta))
		1321	{
		1322	TRANSFER (ta);
		1323	return 1;
		1324	}
		1325	else
		1326	return 0;
		1327	}
		1328
		1329	MODULE = Coro::State PACKAGE = Coro::State
		1330
		1331	PROTOTYPES: DISABLE
		1332
		1333	BOOT:
		1334	{
		1335	#ifdef USE_ITHREADS
		1336	MUTEX_INIT (&coro_mutex);
		1337	#endif
		1338	BOOT_PAGESIZE;
		1339
		1340	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
		1341
		1342	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1343	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1344	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1345	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1346
		1347	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
		1348	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
		1349	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1350	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1351	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1352	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1353	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
		1354
		1355	main_mainstack = PL_mainstack;
		1356	main_top_env = PL_top_env;
		1357
		1358	while (main_top_env->je_prev)
		1359	main_top_env = main_top_env->je_prev;
		1360
		1361	coroapi.ver = CORO_API_VERSION;
		1362	coroapi.transfer = api_transfer;
		1363
		1364	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1365	}
		1366
		1367	SV *
		1368	new (char *klass, ...)
		1369	CODE:
		1370	{
		1371	struct coro *coro;
		1372	HV *hv;
		1373	int i;
		1374
		1375	Newz (0, coro, 1, struct coro);
		1376	coro->args = newAV ();
		1377	coro->save = CORO_SAVE_DEF;
		1378	coro->flags = CF_NEW;
		1379
		1380	if (coro_first) coro_first->prev = coro;
		1381	coro->next = coro_first;
		1382	coro_first = coro;
		1383
		1384	coro->hv = hv = newHV ();
		1385	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1386	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1387
		1388	for (i = 1; i < items; i++)
		1389	av_push (coro->args, newSVsv (ST (i)));
		1390	}
		1391	OUTPUT:
		1392	RETVAL
		1393
		1394	int
		1395	save (SV *coro, int new_save = -1)
		1396	CODE:
		1397	RETVAL = api_save (coro, new_save);
		1398	OUTPUT:
		1399	RETVAL
		1400
		1401	int
		1402	save_also (SV *coro_sv, int save_also)
		1403	CODE:
		1404	{
		1405	struct coro *coro = SvSTATE (coro_sv);
		1406	RETVAL = coro->save;
		1407	coro->save \|= save_also;
		1408	}
		1409	OUTPUT:
		1410	RETVAL
		1411
		1412	void
		1413	_set_stacklevel (...)
		1414	ALIAS:
		1415	Coro::State::transfer = 1
		1416	Coro::schedule = 2
		1417	Coro::cede = 3
		1418	Coro::cede_notself = 4
		1419	CODE:
		1420	{
		1421	struct transfer_args ta;
		1422
		1423	switch (ix)
		1424	{
		1425	case 0:
		1426	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1427	ta.next = 0;
		1428	break;
		1429
		1430	case 1:
		1431	if (items != 2)
		1432	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1433
		1434	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1435	break;
		1436
		1437	case 2:
		1438	prepare_schedule (aTHX_ &ta);
		1439	break;
		1440
		1441	case 3:
		1442	prepare_cede (aTHX_ &ta);
		1443	break;
		1444
		1445	case 4:
		1446	if (!prepare_cede_notself (aTHX_ &ta))
		1447	XSRETURN_EMPTY;
		1448
		1449	break;
		1450	}
		1451
		1452	BARRIER;
		1453	TRANSFER (ta);
		1454
		1455	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1456	XSRETURN_YES;
		1457	}
		1458
		1459	bool
		1460	_destroy (SV *coro_sv)
		1461	CODE:
		1462	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1463	OUTPUT:
		1464	RETVAL
		1465
		1466	void
		1467	_exit (code)
		1468	int code
		1469	PROTOTYPE: $
		1470	CODE:
		1471	_exit (code);
		1472
		1473	int
		1474	cctx_stacksize (int new_stacksize = 0)
		1475	CODE:
		1476	RETVAL = coro_stacksize;
		1477	if (new_stacksize)
		1478	coro_stacksize = new_stacksize;
		1479	OUTPUT:
		1480	RETVAL
		1481
		1482	int
		1483	cctx_count ()
		1484	CODE:
		1485	RETVAL = cctx_count;
		1486	OUTPUT:
		1487	RETVAL
		1488
		1489	int
		1490	cctx_idle ()
		1491	CODE:
		1492	RETVAL = cctx_idle;
		1493	OUTPUT:
		1494	RETVAL
		1495
		1496	void
		1497	list ()
		1498	PPCODE:
		1499	{
		1500	struct coro *coro;
		1501	for (coro = coro_first; coro; coro = coro->next)
		1502	if (coro->hv)
		1503	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1504	}
		1505
		1506	void
		1507	call (Coro::State coro, SV *coderef)
		1508	ALIAS:
		1509	eval = 1
		1510	CODE:
		1511	{
		1512	if (coro->mainstack)
		1513	{
		1514	struct coro temp;
		1515	Zero (&temp, 1, struct coro);
		1516	temp.save = CORO_SAVE_ALL;
		1517
		1518	if (!(coro->flags & CF_RUNNING))
		1519	{
		1520	save_perl (aTHX_ &temp);
		1521	load_perl (aTHX_ coro);
		1522	}
		1523
716	{	1524	{
717	if (!prev->stack)
718	allocate_stack (prev, 0);
719
720	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
721	{	1525	dSP;
722	setup_coro (next);
723
724	prev->stack->refcnt++;
725	prev->stack->usecnt++;
726	next->stack = prev->stack;
727	next->gencnt = prev->gencnt;
728	}	1526	ENTER;
		1527	SAVETMPS;
		1528	PUSHMARK (SP);
		1529	PUTBACK;
		1530	if (ix)
		1531	eval_sv (coderef, 0);
729	else	1532	else
		1533	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1534	SPAGAIN;
		1535	FREETMPS;
730	{	1536	LEAVE;
731	allocate_stack (next, 1);	1537	PUTBACK;
732	coro_create (&(next->stack->cctx),
733	setup_coro, (void *)next,
734	next->stack->sptr, labs (next->stack->ssize));
735	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
736	}
737	}	1538	}
		1539
		1540	if (!(coro->flags & CF_RUNNING))
		1541	{
		1542	save_perl (aTHX_ coro);
		1543	load_perl (aTHX_ &temp);
		1544	}
		1545	}
		1546	}
		1547
		1548	SV *
		1549	is_ready (Coro::State coro)
		1550	PROTOTYPE: $
		1551	ALIAS:
		1552	is_ready = CF_READY
		1553	is_running = CF_RUNNING
		1554	is_new = CF_NEW
		1555	is_destroyed = CF_DESTROYED
		1556	CODE:
		1557	RETVAL = boolSV (coro->flags & ix);
		1558	OUTPUT:
		1559	RETVAL
		1560
		1561	void
		1562	trace (Coro::State coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1563	CODE:
		1564	if (flags & CC_TRACE)
		1565	{
		1566	if (!coro->cctx)
		1567	coro->cctx = cctx_new ();
		1568	else if (!(coro->cctx->flags & CC_TRACE))
		1569	croak ("cannot enable tracing on coroutine with custom stack");
		1570
		1571	coro->cctx->flags \|= flags & (CC_TRACE \| CC_TRACE_ALL);
		1572	}
738	else	1573	else
739	setup_coro (next);	1574	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1575	{
		1576	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1577	coro->cctx->flags \|= CC_NOREUSE;
		1578
		1579	if (coro->flags & CF_RUNNING)
		1580	PL_runops = RUNOPS_DEFAULT;
		1581	else
		1582	coro->runops = RUNOPS_DEFAULT;
740	}	1583	}
741	}
742		1584
743	next->cursp = stacklevel;	1585	SV *
744	}	1586	has_stack (Coro::State coro)
		1587	PROTOTYPE: $
		1588	CODE:
		1589	RETVAL = boolSV (!!coro->cctx);
		1590	OUTPUT:
		1591	RETVAL
745		1592
746	MODULE = Coro::State PACKAGE = Coro::State	1593	int
		1594	is_traced (Coro::State coro)
		1595	PROTOTYPE: $
		1596	CODE:
		1597	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1598	OUTPUT:
		1599	RETVAL
747		1600
748	PROTOTYPES: ENABLE	1601	IV
749		1602	rss (Coro::State coro)
750	BOOT:
751	{ /* {} necessary for stoopid perl-5.6.x */
752	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
753	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
754	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
755
756	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
757	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
758	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
759	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
760
761	if (!padlist_cache)
762	padlist_cache = newHV ();
763
764	main_mainstack = PL_mainstack;
765	}
766
767	Coro::State
768	_newprocess(args)
769	SV * args
770	PROTOTYPE: $	1603	PROTOTYPE: $
771	CODE:	1604	CODE:
772	Coro__State coro;
773
774	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
775	croak ("Coro::State::_newprocess expects an arrayref");
776
777	New (0, coro, 1, struct coro);
778
779	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
780	coro->mainstack = 0; /* actual work is done inside transfer */
781	coro->stack = 0;
782
783	RETVAL = coro;	1605	RETVAL = coro_rss (coro);
784	OUTPUT:	1606	OUTPUT:
785	RETVAL	1607	RETVAL
786		1608
		1609
		1610	MODULE = Coro::State PACKAGE = Coro
		1611
		1612	BOOT:
		1613	{
		1614	int i;
		1615
		1616	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1617	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1618	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1619
		1620	coro_current = get_sv ("Coro::current", FALSE);
		1621	SvREADONLY_on (coro_current);
		1622
		1623	coro_stash = gv_stashpv ("Coro", TRUE);
		1624
		1625	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1626	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1627	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1628	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1629	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1630	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1631
		1632	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1633	coro_ready[i] = newAV ();
		1634
		1635	{
		1636	SV *sv = perl_get_sv("Coro::API", 1);
		1637
		1638	coroapi.schedule = api_schedule;
		1639	coroapi.save = api_save;
		1640	coroapi.cede = api_cede;
		1641	coroapi.cede_notself = api_cede_notself;
		1642	coroapi.ready = api_ready;
		1643	coroapi.is_ready = api_is_ready;
		1644	coroapi.nready = &coro_nready;
		1645	coroapi.current = coro_current;
		1646
		1647	GCoroAPI = &coroapi;
		1648	sv_setiv (sv, (IV)&coroapi);
		1649	SvREADONLY_on (sv);
		1650	}
		1651	}
		1652
787	void	1653	void
788	transfer(prev, next, flags = TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK)	1654	_set_current (SV *current)
789	Coro::State_or_hashref prev
790	Coro::State_or_hashref next
791	int flags
792	PROTOTYPE: @	1655	PROTOTYPE: $
		1656	CODE:
		1657	SvREFCNT_dec (SvRV (coro_current));
		1658	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1659
		1660	int
		1661	prio (Coro::State coro, int newprio = 0)
		1662	ALIAS:
		1663	nice = 1
793	CODE:	1664	CODE:
794	transfer (aTHX_ prev, next, flags);	1665	{
		1666	RETVAL = coro->prio;
795		1667
		1668	if (items > 1)
		1669	{
		1670	if (ix)
		1671	newprio = coro->prio - newprio;
		1672
		1673	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1674	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1675
		1676	coro->prio = newprio;
		1677	}
		1678	}
		1679	OUTPUT:
		1680	RETVAL
		1681
		1682	SV *
		1683	ready (SV *self)
		1684	PROTOTYPE: $
		1685	CODE:
		1686	RETVAL = boolSV (api_ready (self));
		1687	OUTPUT:
		1688	RETVAL
		1689
		1690	int
		1691	nready (...)
		1692	PROTOTYPE:
		1693	CODE:
		1694	RETVAL = coro_nready;
		1695	OUTPUT:
		1696	RETVAL
		1697
		1698	# for async_pool speedup
796	void	1699	void
797	DESTROY(coro)	1700	_pool_1 (SV *cb)
798	Coro::State coro	1701	CODE:
799	CODE:	1702	{
		1703	int i, len;
		1704	HV hv = (HV )SvRV (coro_current);
		1705	AV *defav = GvAV (PL_defgv);
		1706	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1707	AV *invoke_av;
800		1708
801	if (coro->mainstack && coro->mainstack != main_mainstack)	1709	if (!invoke)
		1710	croak ("\3terminate\2\n");
		1711
		1712	hv_store (hv, "desc", sizeof ("desc") - 1,
		1713	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1714
		1715	invoke_av = (AV *)SvRV (invoke);
		1716	len = av_len (invoke_av);
		1717
		1718	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1719
		1720	if (len > 0)
802	{	1721	{
803	struct coro temp;	1722	av_fill (defav, len - 1);
804		1723	for (i = 0; i < len; ++i)
805	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1724	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
806	LOAD(aTHX_ coro);
807
808	destroy_stacks (aTHX);
809
810	LOAD((&temp)); /* this will get rid of defsv etc.. */
811
812	coro->mainstack = 0;
813	}	1725	}
814		1726
815	deallocate_stack (coro);	1727	SvREFCNT_dec (invoke);
816		1728	}
817	Safefree (coro);
818		1729
819	void	1730	void
820	flush()	1731	_pool_2 (SV *cb)
821	CODE:	1732	CODE:
822	#ifdef MAY_FLUSH	1733	{
823	flush_padlist_cache ();	1734	struct coro *coro = SvSTATE (coro_current);
824	#endif
825		1735
		1736	sv_setsv (cb, &PL_sv_undef);
		1737
		1738	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1739	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1740	croak ("\3terminate\2\n");
		1741
		1742	av_clear (GvAV (PL_defgv));
		1743	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1744	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1745	coro->save = CORO_SAVE_DEF;
		1746	coro->prio = 0;
		1747	av_push (av_async_pool, newSVsv (coro_current));
		1748	}
		1749
		1750
826	MODULE = Coro::State PACKAGE = Coro::Cont	1751	MODULE = Coro::State PACKAGE = Coro::AIO
827		1752
828	# this is slightly dirty	1753	SV *
		1754	_get_state ()
		1755	CODE:
		1756	{
		1757	struct io_state *data;
		1758
		1759	RETVAL = newSV (sizeof (struct io_state));
		1760	data = (struct io_state *)SvPVX (RETVAL);
		1761	SvCUR_set (RETVAL, sizeof (struct io_state));
		1762	SvPOK_only (RETVAL);
		1763
		1764	data->errorno = errno;
		1765	data->laststype = PL_laststype;
		1766	data->laststatval = PL_laststatval;
		1767	data->statcache = PL_statcache;
		1768	}
		1769	OUTPUT:
		1770	RETVAL
829		1771
830	void	1772	void
831	yield(...)	1773	_set_state (char *data_)
832	PROTOTYPE: @	1774	PROTOTYPE: $
833	CODE:	1775	CODE:
834	static SV *returnstk;	1776	{
835	SV *sv;	1777	struct io_state data = (void )data_;
836	AV *defav = GvAV (PL_defgv);
837	struct coro prev, next;
838		1778
839	if (!returnstk)	1779	errno = data->errorno;
840	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1780	PL_laststype = data->laststype;
		1781	PL_laststatval = data->laststatval;
		1782	PL_statcache = data->statcache;
		1783	}
841		1784
842	/* set up @_ -- ugly */
843	av_clear (defav);
844	av_fill (defav, items - 1);
845	while (items--)
846	av_store (defav, items, SvREFCNT_inc (ST(items)));
847
848	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
849	sv = av_pop ((AV *)SvRV (returnstk));
850	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
851	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
852	SvREFCNT_dec (sv);
853
854	transfer(aTHX_ prev, next, 0);
855

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Comparing Coro/Coro/State.xs (file contents): Revision 1.18 by root, Thu Jul 26 03:46:15 2001 UTC vs. Revision 1.169 by root, Thu Sep 27 16:25:10 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.18 by root, Thu Jul 26 03:46:15 2001 UTC vs.
Revision 1.169 by root, Thu Sep 27 16:25:10 2007 UTC