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Comparing Coro/Coro/State.xs (file contents):
Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs.
Revision 1.187 by root, Fri Oct 5 20:31:18 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "libcoro/coro.c"	9	#include "patchlevel.h"
6		10
7	#include <signal.h>	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
8		14
9	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
10	# include <unistd.h>	16	# include <unistd.h>
11	# include <sys/mman.h>	17	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
15	# else	21	# else
16	# undef HAVE_MMAP	22	# undef HAVE_MMAP
17	# endif	23	# endif
18	# endif	24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
19	#endif	32	# endif
20
21	#define MAY_FLUSH /* increases codesize */
22
23	/* perl-related */
24	#define TRANSFER_SAVE_DEFAV 0x00000001
25	#define TRANSFER_SAVE_DEFSV 0x00000002
26	#define TRANSFER_SAVE_ERRSV 0x00000004
27	/* c-related */
28	#define TRANSFER_SAVE_CCTXT 0x00000008
29	#ifdef CORO_LAZY_STACK
30	# define TRANSFER_LAZY_STACK 0x00000010
31	#else	33	#else
32	# 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
33	#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
34		74
35	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \	75	/* 5.8.7 */
36	|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
37		79
38	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
39	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
40		83
41	/* The next macro should delcare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
42	* to the current C stack pointer. It's property is that it changes with each call	85	# define CORO_STACKGUARD 0
43	* 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
44	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
45		97
46	#define labs(l) ((l) >= 0 ? (l) : -(l))	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
47		99
48	/* 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	static GV *irsgv; /* $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
		144	static struct coro_cctx *cctx_first;
		145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		154	};
		155
		156	/* this is a structure representing a c-level coroutine */
49	typedef struct {	157	typedef struct coro_cctx {
50	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
51	int usecnt; /* shared by how many coroutines */
52	int gencnt; /* generation counter */
53		159
		160	/* the stack */
		161	void *sptr;
		162	size_t ssize;
		163
		164	/* cpu state */
		165	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		166	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		167	JMPENV *top_env;
54	coro_context cctx;	168	coro_context cctx;
55		169
56	void *sptr;	170	#if CORO_USE_VALGRIND
57	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
58	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
59		175
		176	enum {
		177	CF_RUNNING = 0x0001, /* coroutine is running */
		178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		181	};
		182
		183	/* this is a structure representing a perl-level coroutine */
60	struct coro {	184	struct coro {
61	/* the optional C context */	185	/* the c coroutine allocated to this perl coroutine, if any */
62	coro_stack *stack;	186	coro_cctx *cctx;
63	void *cursp;
64	int gencnt;
65
66	/* optionally saved, might be zero */
67	AV *defav;
68	SV *defsv;
69	SV *errsv;
70
71	/* saved global state not related to stacks */
72	U8 dowarn;
73	I32 in_eval;
74
75	/* the stacks and related info (callchain etc..) */
76	PERL_SI *curstackinfo;
77	AV *curstack;
78	AV *mainstack;
79	SV **stack_sp;
80	OP *op;
81	SV **curpad;
82	SV **stack_base;
83	SV **stack_max;
84	SV **tmps_stack;
85	I32 tmps_floor;
86	I32 tmps_ix;
87	I32 tmps_max;
88	I32 *markstack;
89	I32 *markstack_ptr;
90	I32 *markstack_max;
91	I32 *scopestack;
92	I32 scopestack_ix;
93	I32 scopestack_max;
94	ANY *savestack;
95	I32 savestack_ix;
96	I32 savestack_max;
97	OP **retstack;
98	I32 retstack_ix;
99	I32 retstack_max;
100	COP *curcop;
101	JMPENV *top_env;
102		187
103	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
104	AV *args;	189	AV *args;
		190	int refcnt;
		191	int flags; /* CF_ flags */
		192
		193	/* optionally saved, might be zero */
		194	AV *defav; /* @_ */
		195	SV *defsv; /* $_ */
		196	SV *errsv; /* $@ */
		197	SV *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
		200
		201	#define VAR(name,type) type name;
		202	# include "state.h"
		203	#undef VAR
		204
		205	/* statistics */
		206	int usecount; /* number of transfers to this coro */
		207
		208	/* coro process data */
		209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	SV *saved_deffh;
		214
		215	/* linked list */
		216	struct coro *next, *prev;
		217	HV *hv; /* the perl hash associated with this coro, if any */
105	};	218	};
106		219
107	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
109		222
110	static AV *main_mainstack; /* used to differentiate between $main and others */	223	/** Coro ********************************************************************/
111	static HV *coro_state_stash;	224
112	static SV *ucoro_state_sv;	225	#define PRIO_MAX 3
113	static U32 ucoro_state_hash;	226	#define PRIO_HIGH 1
114	static HV *padlist_cache;	227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
115		231
116	/* for Coro.pm */	232	/* for Coro.pm */
117	static GV *coro_current, *coro_idle;	233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
118	static AV *coro_ready;	235	static int coro_nready;
		236	static struct coro *coro_first;
119		237
120	/* mostly copied from op.c:cv_clone2 */	238	/** lowlevel stuff **********************************************************/
121	STATIC AV *	239
122	clone_padlist (AV *protopadlist)	240	static AV *
		241	coro_clone_padlist (pTHX_ CV *cv)
123	{	242	{
124	AV *av;	243	AV *padlist = CvPADLIST (cv);
125	I32 ix;
126	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
127	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
128	SV **pname = AvARRAY (protopad_name);
129	SV **ppad = AvARRAY (protopad);
130	I32 fname = AvFILLp (protopad_name);
131	I32 fpad = AvFILLp (protopad);
132	AV *newpadlist, *newpad_name, *newpad;	244	AV *newpadlist, *newpad;
133	SV **npad;
134
135	newpad_name = newAV ();
136	for (ix = fname; ix >= 0; ix--)
137	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
138
139	newpad = newAV ();
140	av_fill (newpad, AvFILLp (protopad));
141	npad = AvARRAY (newpad);
142		245
143	newpadlist = newAV ();	246	newpadlist = newAV ();
144	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
145	av_store (newpadlist, 0, (SV *) newpad_name);	248	#if PERL_VERSION_ATLEAST (5,9,0)
		249	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		250	#else
		251	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		252	#endif
		253	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		254	--AvFILLp (padlist);
		255
		256	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
146	av_store (newpadlist, 1, (SV *) newpad);	257	av_store (newpadlist, 1, (SV *)newpad);
147		258
148	av = newAV (); /* will be @_ */	259	return newpadlist;
149	av_extend (av, 0);	260	}
150	av_store (newpad, 0, (SV *) av);
151	AvFLAGS (av) = AVf_REIFY;
152		261
153	for (ix = fpad; ix > 0; ix--)	262	static void
		263	free_padlist (pTHX_ AV *padlist)
		264	{
		265	/* may be during global destruction */
		266	if (SvREFCNT (padlist))
154	{	267	{
155	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	268	I32 i = AvFILLp (padlist);
156	if (namesv && namesv != &PL_sv_undef)	269	while (i >= 0)
157	{	270	{
158	char *name = SvPVX (namesv); /* XXX */	271	SV **svp = av_fetch (padlist, i--, FALSE);
159	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	272	if (svp)
160	{ /* lexical from outside? */
161	npad[ix] = SvREFCNT_inc (ppad[ix]);
162	}	273	{
163	else
164	{ /* our own lexical */
165	SV *sv;	274	SV *sv;
166	if (*name == '&')	275	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
167	sv = SvREFCNT_inc (ppad[ix]);	276	SvREFCNT_dec (sv);
168	else if (*name == '@')	277
169	sv = (SV *) newAV ();	278	SvREFCNT_dec (*svp);
170	else if (*name == '%')
171	sv = (SV *) newHV ();
172	else
173	sv = NEWSV (0, 0);
174	if (!SvPADBUSY (sv))
175	SvPADMY_on (sv);
176	npad[ix] = sv;
177	}	279	}
178	}	280	}
179	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
180	{
181	npad[ix] = SvREFCNT_inc (ppad[ix]);
182	}
183	else
184	{
185	SV *sv = NEWSV (0, 0);
186	SvPADTMP_on (sv);
187	npad[ix] = sv;
188	}
189	}
190		281
191	#if 0 /* return -ENOTUNDERSTOOD */
192	/* Now that vars are all in place, clone nested closures. */
193
194	for (ix = fpad; ix > 0; ix--) {
195	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
196	if (namesv
197	&& namesv != &PL_sv_undef
198	&& !(SvFLAGS(namesv) & SVf_FAKE)
199	&& *SvPVX(namesv) == '&'
200	&& CvCLONE(ppad[ix]))
201	{
202	CV *kid = cv_clone((CV*)ppad[ix]);
203	SvREFCNT_dec(ppad[ix]);
204	CvCLONE_on(kid);
205	SvPADMY_on(kid);
206	npad[ix] = (SV*)kid;
207	}
208	}
209	#endif
210
211	return newpadlist;
212	}
213
214	#ifdef MAY_FLUSH
215	STATIC AV *
216	free_padlist (AV *padlist)
217	{
218	/* may be during global destruction */
219	if (SvREFCNT(padlist))
220	{
221	I32 i = AvFILLp(padlist);
222	while (i >= 0)
223	{
224	SV **svp = av_fetch(padlist, i--, FALSE);
225	SV *sv = svp ? *svp : Nullsv;
226	if (sv)
227	SvREFCNT_dec(sv);
228	}
229
230	SvREFCNT_dec((SV*)padlist);	282	SvREFCNT_dec ((SV*)padlist);
231	}	283	}
232	}	284	}
233	#endif	285
		286	static int
		287	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		288	{
		289	AV *padlist;
		290	AV *av = (AV *)mg->mg_obj;
		291
		292	/* casting is fun. */
		293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		294	free_padlist (aTHX_ padlist);
		295
		296	SvREFCNT_dec (av);
		297
		298	return 0;
		299	}
		300
		301	#define PERL_MAGIC_coro PERL_MAGIC_ext
		302
		303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		304
		305	#define CORO_MAGIC(cv) \
		306	SvMAGIC (cv) \
		307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		308	? SvMAGIC (cv) \
		309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		310	: 0
		311
		312	static struct coro *
		313	SvSTATE_ (pTHX_ SV *coro)
		314	{
		315	HV *stash;
		316	MAGIC *mg;
		317
		318	if (SvROK (coro))
		319	coro = SvRV (coro);
		320
		321	if (SvTYPE (coro) != SVt_PVHV)
		322	croak ("Coro::State object required");
		323
		324	stash = SvSTASH (coro);
		325	if (stash != coro_stash && stash != coro_state_stash)
		326	{
		327	/* very slow, but rare, check */
		328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		329	croak ("Coro::State object required");
		330	}
		331
		332	mg = CORO_MAGIC (coro);
		333	return (struct coro *)mg->mg_ptr;
		334	}
		335
		336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
234		337
235	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
236	STATIC void	339	static void
237	get_padlist (CV *cv)	340	get_padlist (pTHX_ CV *cv)
238	{	341	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
240		344
241	if (he && AvFILLp ((AV *)*he) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	347	else
244	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
245	}
246
247	STATIC void
248	put_padlist (CV *cv)
249	{
250	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
251
252	if (SvTYPE (*he) != SVt_PVAV)
253	{	348	{
		349	#if CORO_PREFER_PERL_FUNCTIONS
		350	/* this is probably cleaner, but also slower? */
		351	CV *cp = Perl_cv_clone (cv);
		352	CvPADLIST (cv) = CvPADLIST (cp);
		353	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (*he);	354	SvREFCNT_dec (cp);
255	*he = (SV *)newAV ();	355	#else
		356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		357	#endif
256	}	358	}
257
258	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
259	}	359	}
260		360
261	#ifdef MAY_FLUSH	361	static void
262	STATIC void	362	put_padlist (pTHX_ CV *cv)
263	flush_padlist_cache ()
264	{	363	{
265	HV *hv = padlist_cache;	364	MAGIC *mg = CORO_MAGIC (cv);
266	padlist_cache = newHV ();	365	AV *av;
267		366
268	if (hv_iterinit (hv))	367	if (!mg)
269	{
270	HE *he;
271	AV *padlist;
272
273	while (!!(he = hv_iternext (hv)))
274	{
275	AV *av = (AV *)HeVAL(he);
276
277	/* casting is fun. */
278	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
279	free_padlist (padlist);
280	}
281	}	368	{
		369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		371	mg->mg_virtual = &vtbl_coro;
		372	mg->mg_obj = (SV *)newAV ();
		373	}
282		374
283	SvREFCNT_dec (hv);	375	av = (AV *)mg->mg_obj;
284	}
285	#endif
286		376
287	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
288	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
289		379
290	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
291	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	381	}
292		382
293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	383	/** load & save, init *******************************************************/
294		384
295	static void	385	static void
296	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
297	{	387	{
298	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
299	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
300		391
301	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
302	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
303	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
304	PL_stack_sp = c->stack_sp;	395	GvSV (irsgv) = c->irssv_sv;
305	PL_op = c->op;
306	PL_curpad = c->curpad;
307	PL_stack_base = c->stack_base;
308	PL_stack_max = c->stack_max;
309	PL_tmps_stack = c->tmps_stack;
310	PL_tmps_floor = c->tmps_floor;
311	PL_tmps_ix = c->tmps_ix;
312	PL_tmps_max = c->tmps_max;
313	PL_markstack = c->markstack;
314	PL_markstack_ptr = c->markstack_ptr;
315	PL_markstack_max = c->markstack_max;
316	PL_scopestack = c->scopestack;
317	PL_scopestack_ix = c->scopestack_ix;
318	PL_scopestack_max = c->scopestack_max;
319	PL_savestack = c->savestack;
320	PL_savestack_ix = c->savestack_ix;
321	PL_savestack_max = c->savestack_max;
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	PL_curcop = c->curcop;
326	PL_top_env = c->top_env;
327
328	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
329	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
330	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
331		396
332	{	397	{
333	dSP;	398	dSP;
334	CV *cv;	399	CV *cv;
335		400
336	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
337	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
338	{	403	{
339	AV *padlist = (AV *)POPs;
340
341	if (padlist)
342	{
343	put_padlist (cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
344	CvPADLIST(cv) = padlist;	405	CvDEPTH (cv) = PTR2IV (POPs);
345	#ifdef USE_THREADS	406	CvPADLIST (cv) = (AV *)POPs;
346	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
347	#endif
348	}
349
350	++CvDEPTH(cv);
351	}	407	}
352		408
353	PUTBACK;	409	PUTBACK;
354	}	410	}
355	}	411	}
356		412
357	static void	413	static void
358	save_state(pTHX_ Coro__State c, int flags)	414	save_perl (pTHX_ Coro__State c)
359	{	415	{
360	{	416	{
361	dSP;	417	dSP;
362	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
363	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
366	/*	422	/*
367	* the worst thing you can imagine happens first - we have to save	423	* the worst thing you can imagine happens first - we have to save
368	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
369	*/	425	*/
370		426
371	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
372	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
373	for (;;)	429	for (;;)
374	{	430	{
375	do	431	while (cxix >= 0)
376	{	432	{
377	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
378		434
379	if (CxTYPE(cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
380	{	436	{
381	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
		438
382	if (CvDEPTH(cv))	439	if (CvDEPTH (cv))
383	{	440	{
384	#ifdef USE_THREADS
385	/*XPUSHs ((SV *)CvOWNER(cv));*/
386	/*CvOWNER(cv) = 0;*/
387	/*error must unlock this cv etc.. etc...*/
388	#endif
389	EXTEND (SP, CvDEPTH(cv)*2);	441	EXTEND (SP, 3);
390
391	while (--CvDEPTH(cv))
392	{
393	/* this tells the restore code to increment CvDEPTH */
394	PUSHs (Nullsv);
395	PUSHs ((SV *)cv);
396	}
397
398	PUSHs ((SV *)CvPADLIST(cv));	442	PUSHs ((SV *)CvPADLIST (cv));
		443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
399	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
400		445
401	get_padlist (cv); /* this is a monster */	446	CvDEPTH (cv) = 0;
		447	get_padlist (aTHX_ cv);
402	}	448	}
403	}	449	}
404	else if (CxTYPE(cx) == CXt_FORMAT)
405	{
406	/* I never used formats, so how should I know how these are implemented? */
407	/* my bold guess is as a simple, plain sub... */
408	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
409	}
410	}	450	}
411	while (cxix >= 0);
412		451
413	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
414	break;	453	break;
415		454
416	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
417	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
418	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
419	}	458	}
420		459
421	PUTBACK;	460	PUTBACK;
422	}	461	}
423		462
424	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
425	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
426	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
		466	c->irssv_sv = GvSV (irsgv);
427		467
428	/* I have not the slightest idea of why av_reify is necessary */	468	#define VAR(name,type)c->name = PL_ ## name;
429	/* but if it's missing the defav contents magically get replaced sometimes */	469	# include "state.h"
430	if (c->defav)	470	#undef VAR
431	av_reify (c->defav);
432
433	c->dowarn = PL_dowarn;
434	c->in_eval = PL_in_eval;
435
436	c->curstackinfo = PL_curstackinfo;
437	c->curstack = PL_curstack;
438	c->mainstack = PL_mainstack;
439	c->stack_sp = PL_stack_sp;
440	c->op = PL_op;
441	c->curpad = PL_curpad;
442	c->stack_base = PL_stack_base;
443	c->stack_max = PL_stack_max;
444	c->tmps_stack = PL_tmps_stack;
445	c->tmps_floor = PL_tmps_floor;
446	c->tmps_ix = PL_tmps_ix;
447	c->tmps_max = PL_tmps_max;
448	c->markstack = PL_markstack;
449	c->markstack_ptr = PL_markstack_ptr;
450	c->markstack_max = PL_markstack_max;
451	c->scopestack = PL_scopestack;
452	c->scopestack_ix = PL_scopestack_ix;
453	c->scopestack_max = PL_scopestack_max;
454	c->savestack = PL_savestack;
455	c->savestack_ix = PL_savestack_ix;
456	c->savestack_max = PL_savestack_max;
457	c->retstack = PL_retstack;
458	c->retstack_ix = PL_retstack_ix;
459	c->retstack_max = PL_retstack_max;
460	c->curcop = PL_curcop;
461	c->top_env = PL_top_env;
462	}	471	}
463		472
464	/*	473	/*
465	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
466	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
467	* on the assumption that coroutines do not usually need	476	* on the (sometimes correct) assumption that coroutines do
468	* a lot of stackspace.	477	* not usually need a lot of stackspace.
469	*/	478	*/
470	STATIC void	479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
		482	static void
471	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
472	{	484	{
473	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	485	PL_curstackinfo = new_stackinfo(64, 6);
474	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
475	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
476	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
477		489
478	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
479	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
480	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
481		493
482	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
483	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
484	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
485	PL_tmps_max = 96;	497	PL_tmps_max = 64;
486		498
487	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
488	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
489	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
490		502
		503	#ifdef SET_MARK_OFFSET
491	SET_MARK_OFFSET;	504	SET_MARK_OFFSET;
		505	#endif
492		506
493	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
494	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
495	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
496		510
497	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
498	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
499	PL_savestack_max = 96;	513	PL_savestack_max = 64;
500		514
		515	#if !PERL_VERSION_ATLEAST (5,9,0)
501	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
502	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
503	PL_retstack_max = 8;	518	PL_retstack_max = 4;
		519	#endif
504	}	520	}
		521	#endif
505		522
506	/*	523	/*
507	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
508	* still there is a memleak of 128 bytes...
509	*/	525	*/
510	STATIC void	526	static void
511	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
512	{	528	{
513	/* is this ugly, I ask? */
514	while (PL_scopestack_ix)
515	LEAVE;
516
517	/* sure it is, but more important: is it correct?? :/ */
518	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
519	FREETMPS;
520
521	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
522	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
523		531
524	while (PL_curstackinfo)	532	while (PL_curstackinfo)
525	{	533	{
526	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
527		535
528	{	536	if (!IN_DESTRUCT)
529	dSP;
530	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
531	PUTBACK; /* possibly superfluous */
532	}
533
534	dounwind(-1);
535
536	SvREFCNT_dec(PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
		538
537	Safefree(PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
538	Safefree(PL_curstackinfo);	540	Safefree (PL_curstackinfo);
539	PL_curstackinfo = p;	541	PL_curstackinfo = p;
540	}	542	}
541		543
542	Safefree(PL_tmps_stack);	544	Safefree (PL_tmps_stack);
543	Safefree(PL_markstack);	545	Safefree (PL_markstack);
544	Safefree(PL_scopestack);	546	Safefree (PL_scopestack);
545	Safefree(PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
546	Safefree(PL_retstack);	549	Safefree (PL_retstack);
547	}
548
549	static void
550	allocate_stack (Coro__State ctx, int alloc)
551	{
552	coro_stack *stack;
553
554	New (0, stack, 1, coro_stack);
555
556	stack->refcnt = 1;
557	stack->usecnt = 1;
558	stack->gencnt = ctx->gencnt = 0;
559	if (alloc)
560	{
561	#ifdef HAVE_MMAP
562	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
563	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
564	if (stack->sptr == (void *)-1)
565	#endif	550	#endif
		551	}
		552
		553	static size_t
		554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (*coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
566	{	561	{
567	/*FIXME*//*D*//* reasonable stack size! */	562	#define VAR(name,type)coro->name = PL_ ## name;
568	stack->ssize = -4096 * sizeof (long);	563	# include "state.h"
569	New (0, stack->sptr, 4096, long);	564	#undef VAR
570	}	565	}
571	}
572	else
573	stack->sptr = 0;
574		566
575	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
576	}	568	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
577		575
578	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
579	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
580	{	578	#endif
581	coro_stack *stack = ctx->stack;
582
583	ctx->stack = 0;
584
585	if (stack)
586	{	579	}
587	if (!--stack->refcnt)
588	{
589	#ifdef HAVE_MMAP
590	if (stack->ssize > 0 && stack->sptr)
591	munmap (stack->sptr, stack->ssize);
592	else
593	#else
594	Safefree (stack->sptr);
595	#endif
596	Safefree (stack);
597	}
598	else if (ctx->gencnt == stack->gencnt)
599	--stack->usecnt;
600	}
601	}
602		580
		581	return rss;
		582	}
		583
		584	/** coroutine stack handling ************************************************/
		585
603	static void	586	static void
604	setup_coro (void *arg)	587	coro_setup (pTHX_ struct coro *coro)
605	{	588	{
606	/*	589	/*
607	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
608	*/	591	*/
		592	coro_init_stacks (aTHX);
		593
		594	PL_runops = RUNOPS_DEFAULT;
		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	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	SvREFCNT_inc (PL_defoutgv);
		610
		611	{
		612	dSP;
		613	LOGOP myop;
		614
		615	Zero (&myop, 1, LOGOP);
		616	myop.op_next = Nullop;
		617	myop.op_flags = OPf_WANT_VOID;
		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
		622	PL_op = (OP *)&myop;
		623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		624	SPAGAIN;
		625	}
		626
		627	ENTER; /* necessary e.g. for dounwind */
		628	}
		629
		630	static void
		631	coro_destroy (pTHX_ struct coro *coro)
		632	{
		633	if (!IN_DESTRUCT)
		634	{
		635	/* restore all saved variables and stuff */
		636	LEAVE_SCOPE (0);
		637	assert (PL_tmps_floor == -1);
		638
		639	/* free all temporaries */
		640	FREETMPS;
		641	assert (PL_tmps_ix == -1);
		642
		643	/* unwind all extra stacks */
		644	POPSTACK_TO (PL_mainstack);
		645
		646	/* unwind main stack */
		647	dounwind (-1);
		648	}
		649
		650	SvREFCNT_dec (GvSV (PL_defgv));
		651	SvREFCNT_dec (GvAV (PL_defgv));
		652	SvREFCNT_dec (GvSV (PL_errgv));
		653	SvREFCNT_dec (PL_defoutgv);
		654	SvREFCNT_dec (PL_rs);
		655	SvREFCNT_dec (GvSV (irsgv));
		656
		657	SvREFCNT_dec (coro->saved_deffh);
		658	//SvREFCNT_dec (coro->throw);
		659
		660	coro_destroy_stacks (aTHX);
		661	}
		662
		663	static void
		664	free_coro_mortal (pTHX)
		665	{
		666	if (coro_mortal)
		667	{
		668	SvREFCNT_dec (coro_mortal);
		669	coro_mortal = 0;
		670	}
		671	}
		672
		673	static int
		674	runops_trace (pTHX)
		675	{
		676	COP *oldcop = 0;
		677	int oldcxix = -2;
		678	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		679	coro_cctx *cctx = coro->cctx;
		680
		681	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		682	{
		683	PERL_ASYNC_CHECK ();
		684
		685	if (cctx->flags & CC_TRACE_ALL)
		686	{
		687	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		688	{
		689	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		690	SV **bot, **top;
		691	AV *av = newAV (); /* return values */
		692	SV **cb;
		693	dSP;
		694
		695	GV *gv = CvGV (cx->blk_sub.cv);
		696	SV *fullname = sv_2mortal (newSV (0));
		697	if (isGV (gv))
		698	gv_efullname3 (fullname, gv, 0);
		699
		700	bot = PL_stack_base + cx->blk_oldsp + 1;
		701	top = cx->blk_gimme == G_ARRAY ? SP + 1
		702	: cx->blk_gimme == G_SCALAR ? bot + 1
		703	: bot;
		704
		705	while (bot < top)
		706	av_push (av, SvREFCNT_inc (*bot++));
		707
		708	PL_runops = RUNOPS_DEFAULT;
		709	ENTER;
		710	SAVETMPS;
		711	EXTEND (SP, 3);
		712	PUSHMARK (SP);
		713	PUSHs (&PL_sv_no);
		714	PUSHs (fullname);
		715	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		716	PUTBACK;
		717	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		718	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		719	SPAGAIN;
		720	FREETMPS;
		721	LEAVE;
		722	PL_runops = runops_trace;
		723	}
		724
		725	if (oldcop != PL_curcop)
		726	{
		727	oldcop = PL_curcop;
		728
		729	if (PL_curcop != &PL_compiling)
		730	{
		731	SV **cb;
		732
		733	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		734	{
		735	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		736
		737	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		738	{
		739	runops_proc_t old_runops = PL_runops;
		740	dSP;
		741	GV *gv = CvGV (cx->blk_sub.cv);
		742	SV *fullname = sv_2mortal (newSV (0));
		743
		744	if (isGV (gv))
		745	gv_efullname3 (fullname, gv, 0);
		746
		747	PL_runops = RUNOPS_DEFAULT;
		748	ENTER;
		749	SAVETMPS;
		750	EXTEND (SP, 3);
		751	PUSHMARK (SP);
		752	PUSHs (&PL_sv_yes);
		753	PUSHs (fullname);
		754	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		755	PUTBACK;
		756	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		757	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		758	SPAGAIN;
		759	FREETMPS;
		760	LEAVE;
		761	PL_runops = runops_trace;
		762	}
		763
		764	oldcxix = cxstack_ix;
		765	}
		766
		767	if (cctx->flags & CC_TRACE_LINE)
		768	{
		769	dSP;
		770
		771	PL_runops = RUNOPS_DEFAULT;
		772	ENTER;
		773	SAVETMPS;
		774	EXTEND (SP, 3);
		775	PL_runops = RUNOPS_DEFAULT;
		776	PUSHMARK (SP);
		777	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		778	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		779	PUTBACK;
		780	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		781	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		782	SPAGAIN;
		783	FREETMPS;
		784	LEAVE;
		785	PL_runops = runops_trace;
		786	}
		787	}
		788	}
		789	}
		790	}
		791
		792	TAINT_NOT;
		793	return 0;
		794	}
		795
		796	/* inject a fake call to Coro::State::_cctx_init into the execution */
		797	/* _cctx_init should be careful, as it could be called at almost any time */
		798	/* during execution of a perl program */
		799	static void NOINLINE
		800	prepare_cctx (pTHX_ coro_cctx *cctx)
		801	{
609	dSP;	802	dSP;
610	Coro__State ctx = (Coro__State)arg;	803	LOGOP myop;
611	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
612		804
613	coro_init_stacks (aTHX);	805	PL_top_env = &PL_start_env;
614	/*PL_curcop = 0;*/
615	/*PL_in_eval = PL_in_eval;*/ /* inherit */
616	SvREFCNT_dec (GvAV (PL_defgv));
617	GvAV (PL_defgv) = ctx->args;
618		806
		807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
		809
		810	Zero (&myop, 1, LOGOP);
		811	myop.op_next = PL_op;
		812	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		813
		814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		818	PUTBACK;
		819	PL_op = (OP *)&myop;
		820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
619	SPAGAIN;	821	SPAGAIN;
		822	}
620		823
621	if (ctx->stack)	824	/*
622	{	825	* this is a _very_ stripped down perl interpreter ;)
623	ctx->cursp = 0;	826	*/
		827	static void
		828	coro_run (void *arg)
		829	{
		830	dTHX;
624		831
625	PUSHMARK(SP);	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
626	PUTBACK;	833	UNLOCK;
627	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
628		834
629	if (SvTRUE (ERRSV))	835	/* we now skip the entersub that lead to transfer() */
630	croak (NULL);	836	PL_op = PL_op->op_next;
631	else	837
632	croak ("FATAL: CCTXT coroutine returned!");	838	/* inject a fake subroutine call to cctx_init */
		839	prepare_cctx (aTHX_ (coro_cctx *)arg);
		840
		841	/* somebody or something will hit me for both perl_run and PL_restartop */
		842	PL_restartop = PL_op;
		843	perl_run (PL_curinterp);
		844
		845	/*
		846	* If perl-run returns we assume exit() was being called or the coro
		847	* fell off the end, which seems to be the only valid (non-bug)
		848	* reason for perl_run to return. We try to exit by jumping to the
		849	* bootstrap-time "top" top_env, as we cannot restore the "main"
		850	* coroutine as Coro has no such concept
		851	*/
		852	PL_top_env = main_top_env;
		853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		854	}
		855
		856	static coro_cctx *
		857	cctx_new ()
		858	{
		859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
		862
		863	++cctx_count;
		864
		865	Newz (0, cctx, 1, coro_cctx);
		866
		867	#if HAVE_MMAP
		868
		869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		870	/* mmap supposedly does allocate-on-write for us */
		871	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		872
		873	if (cctx->sptr != (void *)-1)
		874	{
		875	# if CORO_STACKGUARD
		876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		877	# endif
		878	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		879	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		880	cctx->flags |= CC_MAPPED;
633	}	881	}
634	else	882	else
635	{	883	#endif
636	UNOP myop;
637
638	PL_op = (OP *)&myop;
639
640	Zero(&myop, 1, UNOP);
641	myop.op_next = Nullop;
642	myop.op_flags = OPf_WANT_VOID;
643
644	PUSHMARK(SP);
645	XPUSHs (sub_init);
646	/*
647	* the next line is slightly wrong, as PL_op->op_next
648	* is actually being executed so we skip the first op.
649	* that doesn't matter, though, since it is only
650	* pp_nextstate and we never return...
651	* ah yes, and I don't care anyways ;)
652	*/
653	PUTBACK;
654	PL_op = pp_entersub();
655	SPAGAIN;
656
657	ENTER; /* necessary e.g. for dounwind */
658	}	884	{
659	}	885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
660		887
661	static void	888	if (!cctx->sptr)
662	continue_coro (void *arg)	889	{
663	{	890	perror ("FATAL: unable to allocate stack for coroutine");
664	/*	891	_exit (EXIT_FAILURE);
665	* this is a _very_ stripped down perl interpreter ;)	892	}
666	*/
667	Coro__State ctx = (Coro__State)arg;
668		893
669	/*FIXME*//* must set up top_env here */	894	stack_start = cctx->sptr;
670	ctx->cursp = 0;	895	stack_size = cctx->ssize;
671	PL_op = PL_op->op_next;	896	}
672	CALLRUNOPS(aTHX);
673		897
674	abort ();	898	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
675	}	899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
676		900
677	STATIC void	901	return cctx;
		902	}
		903
		904	static void
		905	cctx_destroy (coro_cctx *cctx)
		906	{
		907	if (!cctx)
		908	return;
		909
		910	--cctx_count;
		911
		912	#if CORO_USE_VALGRIND
		913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		914	#endif
		915
		916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
		918	munmap (cctx->sptr, cctx->ssize);
		919	else
		920	#endif
		921	Safefree (cctx->sptr);
		922
		923	Safefree (cctx);
		924	}
		925
		926	static coro_cctx *
		927	cctx_get (pTHX)
		928	{
		929	while (cctx_first)
		930	{
		931	coro_cctx *cctx = cctx_first;
		932	cctx_first = cctx->next;
		933	--cctx_idle;
		934
		935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		936	return cctx;
		937
		938	cctx_destroy (cctx);
		939	}
		940
		941	return cctx_new ();
		942	}
		943
		944	static void
		945	cctx_put (coro_cctx *cctx)
		946	{
		947	/* free another cctx if overlimit */
		948	if (cctx_idle >= MAX_IDLE_CCTX)
		949	{
		950	coro_cctx *first = cctx_first;
		951	cctx_first = first->next;
		952	--cctx_idle;
		953
		954	cctx_destroy (first);
		955	}
		956
		957	++cctx_idle;
		958	cctx->next = cctx_first;
		959	cctx_first = cctx;
		960	}
		961
		962	/** coroutine switching *****************************************************/
		963
		964	static void NOINLINE
		965	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		966	{
		967	if (prev != next)
		968	{
		969	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		970	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		971
		972	if (next->flags & CF_RUNNING)
		973	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		974
		975	if (next->flags & CF_DESTROYED)
		976	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		977
		978	if (PL_lex_state != LEX_NOTPARSING)
		979	croak ("Coro::State::transfer called while parsing, but this is not supported");
		980	}
		981	}
		982
		983	/* always use the TRANSFER macro */
		984	static void NOINLINE
678	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	985	transfer (pTHX_ struct coro *prev, struct coro *next)
679	{	986	{
680	dSP;
681	dSTACKLEVEL;	987	dSTACKLEVEL;
682		988
		989	/* sometimes transfer is only called to set idle_sp */
		990	if (!next)
		991	{
		992	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		993	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		994	}
683	if (prev != next)	995	else if (prev != next)
684	{	996	{
685	if (next->mainstack)	997	coro_cctx *prev__cctx;
		998
		999	if (prev->flags & CF_NEW)
686	{	1000	{
687	SAVE (prev, flags);	1001	/* create a new empty context */
688	LOAD (next);	1002	Newz (0, prev->cctx, 1, coro_cctx);
689		1003	prev->flags &= ~CF_NEW;
690	/* mark this state as in-use */	1004	prev->flags |= CF_RUNNING;
691	next->mainstack = 0;
692	next->tmps_ix = -2;
693
694	/* stacklevel changed? if yes, grab the stack for us! */
695	if (flags & TRANSFER_SAVE_CCTXT)
696	{
697	if (!prev->stack)
698	allocate_stack (prev, 0);
699	else if (prev->cursp != stacklevel
700	&& prev->stack->usecnt > 1)
701	{
702	prev->gencnt = ++prev->stack->gencnt;
703	prev->stack->usecnt = 1;
704	}
705
706	/* has our stack been invalidated? */
707	if (next->stack && next->stack->gencnt != next->gencnt)
708	{
709	deallocate_stack (next);
710	allocate_stack (next, 1);
711	coro_create (&(next->stack->cctx),
712	continue_coro, (void *)next,
713	next->stack->sptr, labs (next->stack->ssize));
714	}
715
716	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
717	}
718
719	}	1005	}
720	else if (next->tmps_ix == -2)	1006
721	croak ("tried to transfer to running coroutine");	1007	prev->flags &= ~CF_RUNNING;
		1008	next->flags |= CF_RUNNING;
		1009
		1010	LOCK;
		1011
		1012	if (next->flags & CF_NEW)
		1013	{
		1014	/* need to start coroutine */
		1015	next->flags &= ~CF_NEW;
		1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
		1020	}
722	else	1021	else
723	{	1022	{
724	SAVE (prev, -1); /* first get rid of the old state */	1023	/* coroutine already started */
725		1024	save_perl (aTHX_ prev);
726	if (flags & TRANSFER_SAVE_CCTXT)	1025	load_perl (aTHX_ next);
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	setup_coro (next);
734
735	prev->stack->refcnt++;
736	prev->stack->usecnt++;
737	next->stack = prev->stack;
738	next->gencnt = prev->gencnt;
739	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	}
748	}
749	else
750	setup_coro (next);
751	}	1026	}
752	}
753		1027
754	next->cursp = stacklevel;	1028	prev__cctx = prev->cctx;
755	}
756		1029
757	static struct coro *	1030	/* possibly "free" the cctx */
758	sv_to_coro (SV *arg, const char *funcname, const char *varname)	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
759	{
760	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
761	{	1032	{
762	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
763		1035
764	if (!he)	1036	prev->cctx = 0;
765	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
766		1037
767	arg = HeVAL(he);	1038	cctx_put (prev__cctx);
		1039	}
		1040
		1041	++next->usecount;
		1042
		1043	if (!next->cctx)
		1044	next->cctx = cctx_get (aTHX);
		1045
		1046	if (prev__cctx != next->cctx)
		1047	{
		1048	prev__cctx->top_env = PL_top_env;
		1049	PL_top_env = next->cctx->top_env;
		1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1051	}
		1052
		1053	free_coro_mortal (aTHX);
		1054	UNLOCK;
768	}	1055	}
769		1056	}
770	/* must also be changed inside Coro::Cont::yield */	1057
771	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)	1058	struct transfer_args
772	return (struct coro *) SvIV((SV*)SvRV(arg));	1059	{
		1060	struct coro *prev, *next;
		1061	};
		1062
		1063	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1064	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1065
		1066	/** high level stuff ********************************************************/
		1067
		1068	static int
		1069	coro_state_destroy (pTHX_ struct coro *coro)
		1070	{
		1071	if (coro->flags & CF_DESTROYED)
		1072	return 0;
		1073
		1074	coro->flags |= CF_DESTROYED;
		1075
		1076	if (coro->flags & CF_READY)
		1077	{
		1078	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1079	/* alternative: look through all ready queues and remove the coro */
		1080	LOCK;
		1081	--coro_nready;
		1082	UNLOCK;
		1083	}
773	else	1084	else
774	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	1085	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
775	}
776		1086
		1087	if (coro->mainstack && coro->mainstack != main_mainstack)
		1088	{
		1089	struct coro temp;
		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
		1096
		1097	coro_destroy (aTHX_ coro);
		1098
		1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1100
		1101	coro->mainstack = 0;
		1102	}
		1103
		1104	cctx_destroy (coro->cctx);
		1105	SvREFCNT_dec (coro->args);
		1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
		1112	}
		1113
		1114	static int
		1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1116	{
		1117	struct coro *coro = (struct coro *)mg->mg_ptr;
		1118	mg->mg_ptr = 0;
		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
		1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
		1127
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1133	{
		1134	struct coro *coro = (struct coro *)mg->mg_ptr;
		1135
		1136	++coro->refcnt;
		1137
		1138	return 0;
		1139	}
		1140
		1141	static MGVTBL coro_state_vtbl = {
		1142	0, 0, 0, 0,
		1143	coro_state_free,
		1144	0,
		1145	#ifdef MGf_DUP
		1146	coro_state_dup,
		1147	#else
		1148	# define MGf_DUP 0
		1149	#endif
		1150	};
		1151
		1152	static void
		1153	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1154	{
		1155	ta->prev = SvSTATE (prev_sv);
		1156	ta->next = SvSTATE (next_sv);
		1157	TRANSFER_CHECK (*ta);
		1158	}
		1159
		1160	static void
		1161	api_transfer (SV *prev_sv, SV *next_sv)
		1162	{
		1163	dTHX;
		1164	struct transfer_args ta;
		1165
		1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1167	TRANSFER (ta);
		1168	}
		1169
		1170	/** Coro ********************************************************************/
		1171
		1172	static void
		1173	coro_enq (pTHX_ SV *coro_sv)
		1174	{
		1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1176	}
		1177
		1178	static SV *
		1179	coro_deq (pTHX_ int min_prio)
		1180	{
		1181	int prio = PRIO_MAX - PRIO_MIN;
		1182
		1183	min_prio -= PRIO_MIN;
		1184	if (min_prio < 0)
		1185	min_prio = 0;
		1186
		1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1188	if (AvFILLp (coro_ready [prio]) >= 0)
		1189	return av_shift (coro_ready [prio]);
		1190
		1191	return 0;
		1192	}
		1193
		1194	static int
		1195	api_ready (SV *coro_sv)
		1196	{
		1197	dTHX;
		1198	struct coro *coro;
		1199
		1200	if (SvROK (coro_sv))
		1201	coro_sv = SvRV (coro_sv);
		1202
		1203	coro = SvSTATE (coro_sv);
		1204
		1205	if (coro->flags & CF_READY)
		1206	return 0;
		1207
		1208	coro->flags |= CF_READY;
		1209
		1210	LOCK;
		1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
		1213	UNLOCK;
		1214
		1215	return 1;
		1216	}
		1217
		1218	static int
		1219	api_is_ready (SV *coro_sv)
		1220	{
		1221	dTHX;
		1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1223	}
		1224
		1225	static void
		1226	prepare_schedule (pTHX_ struct transfer_args *ta)
		1227	{
		1228	SV *prev_sv, *next_sv;
		1229
		1230	for (;;)
		1231	{
		1232	LOCK;
		1233	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1234
		1235	/* nothing to schedule: call the idle handler */
		1236	if (!next_sv)
		1237	{
		1238	dSP;
		1239	UNLOCK;
		1240
		1241	ENTER;
		1242	SAVETMPS;
		1243
		1244	PUSHMARK (SP);
		1245	PUTBACK;
		1246	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1247
		1248	FREETMPS;
		1249	LEAVE;
		1250	continue;
		1251	}
		1252
		1253	ta->next = SvSTATE (next_sv);
		1254
		1255	/* cannot transfer to destroyed coros, skip and look for next */
		1256	if (ta->next->flags & CF_DESTROYED)
		1257	{
		1258	UNLOCK;
		1259	SvREFCNT_dec (next_sv);
		1260	/* coro_nready is already taken care of by destroy */
		1261	continue;
		1262	}
		1263
		1264	--coro_nready;
		1265	UNLOCK;
		1266	break;
		1267	}
		1268
		1269	/* free this only after the transfer */
		1270	prev_sv = SvRV (coro_current);
		1271	ta->prev = SvSTATE (prev_sv);
		1272	TRANSFER_CHECK (*ta);
		1273	assert (ta->next->flags & CF_READY);
		1274	ta->next->flags &= ~CF_READY;
		1275	SvRV_set (coro_current, next_sv);
		1276
		1277	LOCK;
		1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
		1280	UNLOCK;
		1281	}
		1282
		1283	static void
		1284	prepare_cede (pTHX_ struct transfer_args *ta)
		1285	{
		1286	api_ready (coro_current);
		1287	prepare_schedule (aTHX_ ta);
		1288	}
		1289
		1290	static int
		1291	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1292	{
		1293	if (coro_nready)
		1294	{
		1295	SV *prev = SvRV (coro_current);
		1296	prepare_schedule (aTHX_ ta);
		1297	api_ready (prev);
		1298	return 1;
		1299	}
		1300	else
		1301	return 0;
		1302	}
		1303
		1304	static void
		1305	api_schedule (void)
		1306	{
		1307	dTHX;
		1308	struct transfer_args ta;
		1309
		1310	prepare_schedule (aTHX_ &ta);
		1311	TRANSFER (ta);
		1312	}
		1313
		1314	static int
		1315	api_cede (void)
		1316	{
		1317	dTHX;
		1318	struct transfer_args ta;
		1319
		1320	prepare_cede (aTHX_ &ta);
		1321
		1322	if (ta.prev != ta.next)
		1323	{
		1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
		1329	}
		1330
		1331	static int
		1332	api_cede_notself (void)
		1333	{
		1334	dTHX;
		1335	struct transfer_args ta;
		1336
		1337	if (prepare_cede_notself (aTHX_ &ta))
		1338	{
		1339	TRANSFER (ta);
		1340	return 1;
		1341	}
		1342	else
		1343	return 0;
		1344	}
		1345
		1346	static void
		1347	api_trace (SV *coro_sv, int flags)
		1348	{
		1349	dTHX;
		1350	struct coro *coro = SvSTATE (coro_sv);
		1351
		1352	if (flags & CC_TRACE)
		1353	{
		1354	if (!coro->cctx)
		1355	coro->cctx = cctx_new ();
		1356	else if (!(coro->cctx->flags & CC_TRACE))
		1357	croak ("cannot enable tracing on coroutine with custom stack");
		1358
		1359	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1360	}
		1361	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1362	{
		1363	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1364
		1365	if (coro->flags & CF_RUNNING)
		1366	PL_runops = RUNOPS_DEFAULT;
		1367	else
		1368	coro->runops = RUNOPS_DEFAULT;
		1369	}
		1370	}
		1371
777	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
778		1373
779	PROTOTYPES: ENABLE	1374	PROTOTYPES: DISABLE
780		1375
781	BOOT:	1376	BOOT:
782	{ /* {} necessary for stoopid perl-5.6.x */	1377	{
783	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1378	#ifdef USE_ITHREADS
784	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1379	MUTEX_INIT (&coro_mutex);
		1380	#endif
		1381	BOOT_PAGESIZE;
		1382
		1383	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1384
785	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1385	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
786		1386
787	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1387	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
788	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
789	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
790	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
791
792	if (!padlist_cache)
793	padlist_cache = newHV ();
794		1391
795	main_mainstack = PL_mainstack;	1392	main_mainstack = PL_mainstack;
796	}	1393	main_top_env = PL_top_env;
797		1394
798	Coro::State	1395	while (main_top_env->je_prev)
799	_newprocess(args)	1396	main_top_env = main_top_env->je_prev;
800	SV * args	1397
801	PROTOTYPE: $	1398	coroapi.ver = CORO_API_VERSION;
		1399	coroapi.transfer = api_transfer;
		1400
		1401	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1402	}
		1403
		1404	SV *
		1405	new (char *klass, ...)
802	CODE:	1406	CODE:
803	Coro__State coro;	1407	{
		1408	struct coro *coro;
		1409	HV *hv;
		1410	int i;
804		1411
805	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
806	croak ("Coro::State::_newprocess expects an arrayref");
807
808	New (0, coro, 1, struct coro);	1412	Newz (0, coro, 1, struct coro);
		1413	coro->args = newAV ();
		1414	coro->flags = CF_NEW;
809		1415
810	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1416	if (coro_first) coro_first->prev = coro;
811	coro->mainstack = 0; /* actual work is done inside transfer */	1417	coro->next = coro_first;
812	coro->stack = 0;	1418	coro_first = coro;
813		1419
814	RETVAL = coro;	1420	coro->hv = hv = newHV ();
		1421	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1422	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1423
		1424	for (i = 1; i < items; i++)
		1425	av_push (coro->args, newSVsv (ST (i)));
		1426	}
815	OUTPUT:	1427	OUTPUT:
816	RETVAL	1428	RETVAL
817		1429
		1430	# these not obviously related functions are all rolled into the same xs
		1431	# function to increase chances that they all will call transfer with the same
		1432	# stack offset
818	void	1433	void
819	transfer(prev, next, flags)	1434	_set_stacklevel (...)
820	Coro::State_or_hashref prev	1435	ALIAS:
821	Coro::State_or_hashref next	1436	Coro::State::transfer = 1
822	int flags	1437	Coro::schedule = 2
823	PROTOTYPE: @	1438	Coro::cede = 3
		1439	Coro::cede_notself = 4
824	CODE:	1440	CODE:
825	PUTBACK;	1441	{
826	transfer (aTHX_ prev, next, flags);	1442	struct transfer_args ta;
827	SPAGAIN;	1443
		1444	switch (ix)
		1445	{
		1446	case 0:
		1447	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1448	ta.next = 0;
		1449	break;
		1450
		1451	case 1:
		1452	if (items != 2)
		1453	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1454
		1455	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1456	break;
		1457
		1458	case 2:
		1459	prepare_schedule (aTHX_ &ta);
		1460	break;
		1461
		1462	case 3:
		1463	prepare_cede (aTHX_ &ta);
		1464	break;
		1465
		1466	case 4:
		1467	if (!prepare_cede_notself (aTHX_ &ta))
		1468	XSRETURN_EMPTY;
		1469
		1470	break;
		1471	}
		1472
		1473	BARRIER;
		1474	TRANSFER (ta);
		1475
		1476	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1477	XSRETURN_YES;
		1478	}
		1479
		1480	bool
		1481	_destroy (SV *coro_sv)
		1482	CODE:
		1483	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1484	OUTPUT:
		1485	RETVAL
828		1486
829	void	1487	void
830	DESTROY(coro)
831	Coro::State coro
832	CODE:
833
834	if (coro->mainstack && coro->mainstack != main_mainstack)
835	{
836	struct coro temp;
837
838	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
839	LOAD(aTHX_ coro);
840
841	destroy_stacks (aTHX);
842
843	LOAD((&temp)); /* this will get rid of defsv etc.. */
844
845	coro->mainstack = 0;
846	}
847
848	deallocate_stack (coro);
849
850	Safefree (coro);
851
852	void
853	flush()
854	CODE:
855	#ifdef MAY_FLUSH
856	flush_padlist_cache ();
857	#endif
858
859	void
860	_exit(code)	1488	_exit (code)
861	int code	1489	int code
862	PROTOTYPE: $	1490	PROTOTYPE: $
863	CODE:	1491	CODE:
864	#if defined(__GLIBC__) || _POSIX_C_SOURCE
865	_exit (code);	1492	_exit (code);
866	#else
867	signal (SIGTERM, SIG_DFL);
868	raise (SIGTERM);
869	exit (code);
870	#endif
871		1493
872	MODULE = Coro::State PACKAGE = Coro::Cont	1494	int
		1495	cctx_stacksize (int new_stacksize = 0)
		1496	CODE:
		1497	RETVAL = coro_stacksize;
		1498	if (new_stacksize)
		1499	coro_stacksize = new_stacksize;
		1500	OUTPUT:
		1501	RETVAL
873		1502
874	# this is slightly dirty (should expose a c-level api)	1503	int
		1504	cctx_count ()
		1505	CODE:
		1506	RETVAL = cctx_count;
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	int
		1511	cctx_idle ()
		1512	CODE:
		1513	RETVAL = cctx_idle;
		1514	OUTPUT:
		1515	RETVAL
875		1516
876	void	1517	void
877	yield(...)	1518	list ()
878	PROTOTYPE: @	1519	PPCODE:
		1520	{
		1521	struct coro *coro;
		1522	for (coro = coro_first; coro; coro = coro->next)
		1523	if (coro->hv)
		1524	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1525	}
		1526
		1527	void
		1528	call (Coro::State coro, SV *coderef)
		1529	ALIAS:
		1530	eval = 1
		1531	CODE:
		1532	{
		1533	if (coro->mainstack)
		1534	{
		1535	struct coro temp;
		1536	Zero (&temp, 1, struct coro);
		1537
		1538	if (!(coro->flags & CF_RUNNING))
		1539	{
		1540	save_perl (aTHX_ &temp);
		1541	load_perl (aTHX_ coro);
		1542	}
		1543
		1544	{
		1545	dSP;
		1546	ENTER;
		1547	SAVETMPS;
		1548	PUSHMARK (SP);
		1549	PUTBACK;
		1550	if (ix)
		1551	eval_sv (coderef, 0);
		1552	else
		1553	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1554	SPAGAIN;
		1555	FREETMPS;
		1556	LEAVE;
		1557	PUTBACK;
		1558	}
		1559
		1560	if (!(coro->flags & CF_RUNNING))
		1561	{
		1562	save_perl (aTHX_ coro);
		1563	load_perl (aTHX_ &temp);
		1564	}
		1565	}
		1566	}
		1567
		1568	SV *
		1569	is_ready (Coro::State coro)
		1570	PROTOTYPE: $
		1571	ALIAS:
		1572	is_ready = CF_READY
		1573	is_running = CF_RUNNING
		1574	is_new = CF_NEW
		1575	is_destroyed = CF_DESTROYED
		1576	CODE:
		1577	RETVAL = boolSV (coro->flags & ix);
		1578	OUTPUT:
		1579	RETVAL
		1580
		1581	void
		1582	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1583
		1584	SV *
		1585	has_stack (Coro::State coro)
		1586	PROTOTYPE: $
		1587	CODE:
		1588	RETVAL = boolSV (!!coro->cctx);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	int
		1593	is_traced (Coro::State coro)
		1594	PROTOTYPE: $
		1595	CODE:
		1596	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	IV
		1601	rss (Coro::State coro)
		1602	PROTOTYPE: $
		1603	ALIAS:
		1604	usecount = 1
879	CODE:	1605	CODE:
880	static SV *returnstk;	1606	switch (ix)
881	SV *sv;	1607	{
		1608	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1609	case 1: RETVAL = coro->usecount; break;
		1610	}
		1611	OUTPUT:
		1612	RETVAL
		1613
		1614
		1615	MODULE = Coro::State PACKAGE = Coro
		1616
		1617	BOOT:
		1618	{
		1619	int i;
		1620
		1621	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1622	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1623	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1624
		1625	coro_current = get_sv ("Coro::current", FALSE);
		1626	SvREADONLY_on (coro_current);
		1627
		1628	coro_stash = gv_stashpv ("Coro", TRUE);
		1629
		1630	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1631	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1632	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1633	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1634	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1635	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1636
		1637	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1638	coro_ready[i] = newAV ();
		1639
		1640	{
		1641	SV *sv = perl_get_sv("Coro::API", 1);
		1642
		1643	coroapi.schedule = api_schedule;
		1644	coroapi.cede = api_cede;
		1645	coroapi.cede_notself = api_cede_notself;
		1646	coroapi.ready = api_ready;
		1647	coroapi.is_ready = api_is_ready;
		1648	coroapi.nready = &coro_nready;
		1649	coroapi.current = coro_current;
		1650
		1651	GCoroAPI = &coroapi;
		1652	sv_setiv (sv, (IV)&coroapi);
		1653	SvREADONLY_on (sv);
		1654	}
		1655	}
		1656
		1657	void
		1658	_set_current (SV *current)
		1659	PROTOTYPE: $
		1660	CODE:
		1661	SvREFCNT_dec (SvRV (coro_current));
		1662	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1663
		1664	int
		1665	prio (Coro::State coro, int newprio = 0)
		1666	ALIAS:
		1667	nice = 1
		1668	CODE:
		1669	{
		1670	RETVAL = coro->prio;
		1671
		1672	if (items > 1)
		1673	{
		1674	if (ix)
		1675	newprio = coro->prio - newprio;
		1676
		1677	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1678	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1679
		1680	coro->prio = newprio;
		1681	}
		1682	}
		1683	OUTPUT:
		1684	RETVAL
		1685
		1686	SV *
		1687	ready (SV *self)
		1688	PROTOTYPE: $
		1689	CODE:
		1690	RETVAL = boolSV (api_ready (self));
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	int
		1695	nready (...)
		1696	PROTOTYPE:
		1697	CODE:
		1698	RETVAL = coro_nready;
		1699	OUTPUT:
		1700	RETVAL
		1701
		1702	# for async_pool speedup
		1703	void
		1704	_pool_1 (SV *cb)
		1705	CODE:
		1706	{
		1707	struct coro *coro = SvSTATE (coro_current);
		1708	HV *hv = (HV *)SvRV (coro_current);
882	AV *defav = GvAV (PL_defgv);	1709	AV *defav = GvAV (PL_defgv);
883	struct coro *prev, *next;	1710	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1711	AV *invoke_av;
		1712	int i, len;
884		1713
885	if (!returnstk)	1714	if (!invoke)
886	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1715	croak ("\3terminate\2\n");
887		1716
888	/* set up @_ -- ugly */	1717	SvREFCNT_dec (coro->saved_deffh);
889	av_clear (defav);	1718	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
890	av_fill (defav, items - 1);	1730	av_fill (defav, len - 1);
891	while (items--)	1731	for (i = 0; i < len; ++i)
892	av_store (defav, items, SvREFCNT_inc (ST(items)));	1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
893		1734
894	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
895	sv = av_pop ((AV *)SvRV (returnstk));
896	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
897	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
898	SvREFCNT_dec (sv);	1735	SvREFCNT_dec (invoke);
899
900	transfer(aTHX_ prev, next, 0);
901
902	MODULE = Coro::State PACKAGE = Coro
903
904	# this is slightly dirty (should expose a c-level api)
905
906	BOOT:
907	{
908	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
909	coro_ready = newAV ();
910	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
911	}	1736	}
912		1737
913	void	1738	void
914	ready(self)	1739	_pool_2 (SV *cb)
915	SV * self
916	CODE:	1740	CODE:
917	av_push (coro_ready, SvREFCNT_inc (self));	1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
		1743
		1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1747	coro->saved_deffh = 0;
		1748
		1749	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1750	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1751	croak ("\3terminate\2\n");
		1752
		1753	av_clear (GvAV (PL_defgv));
		1754	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1755	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1756
		1757	coro->prio = 0;
		1758
		1759	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1760	api_trace (coro_current, 0);
		1761
		1762	av_push (av_async_pool, newSVsv (coro_current));
		1763	}
		1764
		1765
		1766	MODULE = Coro::State PACKAGE = Coro::AIO
		1767
		1768	SV *
		1769	_get_state ()
		1770	CODE:
		1771	{
		1772	struct io_state *data;
		1773
		1774	RETVAL = newSV (sizeof (struct io_state));
		1775	data = (struct io_state *)SvPVX (RETVAL);
		1776	SvCUR_set (RETVAL, sizeof (struct io_state));
		1777	SvPOK_only (RETVAL);
		1778
		1779	data->errorno = errno;
		1780	data->laststype = PL_laststype;
		1781	data->laststatval = PL_laststatval;
		1782	data->statcache = PL_statcache;
		1783	}
		1784	OUTPUT:
		1785	RETVAL
918		1786
919	void	1787	void
920	schedule(...)	1788	_set_state (char *data_)
921	ALIAS:	1789	PROTOTYPE: $
922	cede = 1
923	CODE:	1790	CODE:
924	SV *prev = GvSV (coro_current);	1791	{
925	SV *next = av_shift (coro_ready);	1792	struct io_state *data = (void *)data_;
926		1793
927	if (next == &PL_sv_undef)	1794	errno = data->errorno;
928	next = SvREFCNT_inc (GvSV (coro_idle));	1795	PL_laststype = data->laststype;
		1796	PL_laststatval = data->laststatval;
		1797	PL_statcache = data->statcache;
		1798	}
929		1799
930	if (ix)
931	av_push (coro_ready, SvREFCNT_inc (prev));
932
933	GvSV (coro_current) = SvREFCNT_inc (next);
934	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
935	sv_to_coro (next, "Coro::schedule", "next coroutine"),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	SvREFCNT_dec (next);
938	SvREFCNT_dec (prev);
939

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