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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.182 by root, Wed Oct 3 18:37:48 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#if PATCHLEVEL < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
10	# endif	57	# endif
11	# ifndef call_sv	58	# ifndef call_sv
12	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
23	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
25	# endif	72	# endif
26	#endif	73	#endif
27		74
28	#include "libcoro/coro.c"	75	/* 5.8.7 */
29		76	#ifndef SvRV_set
30	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	78	#endif
42	#endif
43		79
44	#define MAY_FLUSH /* increases codesize and is rarely used */	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
45		83
46	#define SUB_INIT "Coro::State::initialize"	84	#ifndef CORO_STACKGUARD
47	#define UCORO_STATE "_coro_state"	85	# define CORO_STACKGUARD 0
		86	#endif
48		87
49	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
50	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
51	* and should be unique. */	90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
		95	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
53		97
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		99
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
57		109
58	#include "CoroAPI.h"	110	#include "CoroAPI.h"
59		111
		112	#ifdef USE_ITHREADS
		113	static perl_mutex coro_mutex;
		114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		116	#else
		117	# define LOCK (void)0
		118	# define UNLOCK (void)0
		119	#endif
		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
60	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
		132	static AV main_mainstack; / used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
		134	static HV coro_state_stash, coro_stash;
		135	static SV coro_mortal; / will be freed after next transfer */
61		136
62	/* this is actually not only the c stack but also c registers etc... */	137	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 */
63	typedef struct {	157	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		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;
68	coro_context cctx;	168	coro_context cctx;
69		169
70	void *sptr;	170	#if CORO_USE_VALGRIND
71	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
72	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
73		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 */
74	struct coro {	184	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	185	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	186	coro_cctx *cctx;
77
78	/* the optional C context */
79	coro_stack *stack;
80	void *cursp;
81	int gencnt;
82
83	/* optionally saved, might be zero */
84	AV *defav;
85	SV *defsv;
86	SV *errsv;
87
88	/* saved global state not related to stacks */
89	U8 dowarn;
90	I32 in_eval;
91
92	/* the stacks and related info (callchain etc..) */
93	PERL_SI *curstackinfo;
94	AV *curstack;
95	AV *mainstack;
96	SV **stack_sp;
97	OP *op;
98	SV **curpad;
99	AV *comppad;
100	SV **stack_base;
101	SV **stack_max;
102	SV **tmps_stack;
103	I32 tmps_floor;
104	I32 tmps_ix;
105	I32 tmps_max;
106	I32 *markstack;
107	I32 *markstack_ptr;
108	I32 *markstack_max;
109	I32 *scopestack;
110	I32 scopestack_ix;
111	I32 scopestack_max;
112	ANY *savestack;
113	I32 savestack_ix;
114	I32 savestack_max;
115	OP **retstack;
116	I32 retstack_ix;
117	I32 retstack_max;
118	COP *curcop;
119	JMPENV *top_env;
120		187
121	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
122	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	GV 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	GV *asp_deffh;
		214
		215	/* linked list */
		216	struct coro next, prev;
		217	HV hv; / the perl hash associated with this coro, if any */
123	};	218	};
124		219
125	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
127		222
128	static AV main_mainstack; / used to differentiate between $main and others */	223	/ Coro ******************************************************************/
129	static HV *coro_state_stash;
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV coro_mortal; / will be freed after next transfer */
134		224
135	/* mostly copied from op.c:cv_clone2 */	225	#define PRIO_MAX 3
136	STATIC AV *	226	#define PRIO_HIGH 1
137	clone_padlist (AV *protopadlist)	227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
		231
		232	/* for Coro.pm */
		233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		235	static int coro_nready;
		236	static struct coro *coro_first;
		237
		238	/ lowlevel stuff ********************************************************/
		239
		240	static AV *
		241	coro_clone_padlist (pTHX_ CV *cv)
138	{	242	{
139	AV *av;	243	AV *padlist = CvPADLIST (cv);
140	I32 ix;
141	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
142	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV newpadlist, newpad_name, *newpad;	244	AV newpadlist, newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157		245
158	newpadlist = newAV ();	246	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
160	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)));
161	av_store (newpadlist, 1, (SV *) newpad);	257	av_store (newpadlist, 1, (SV *)newpad);
162		258
163	av = newAV (); /* will be @_ */	259	return newpadlist;
164	av_extend (av, 0);	260	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		261
168	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))
169	{	267	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	268	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	269	while (i >= 0)
172	{	270	{
173	char name = SvPVX (namesv); / XXX */	271	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	272	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	273	{
178	else
179	{ /* our own lexical */
180	SV *sv;	274	SV *sv;
181	if (*name == '&')	275	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	276	SvREFCNT_dec (sv);
183	else if (*name == '@')	277
184	sv = (SV *) newAV ();	278	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	if (!SvPADBUSY (sv))
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}	279	}
193	}	280	}
194	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205		281
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV kid = cv_clone((CV)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225
226	return newpadlist;
227	}
228
229	#ifdef MAY_FLUSH
230	STATIC void
231	free_padlist (AV *padlist)
232	{
233	/* may be during global destruction */
234	if (SvREFCNT(padlist))
235	{
236	I32 i = AvFILLp(padlist);
237	while (i >= 0)
238	{
239	SV **svp = av_fetch(padlist, i--, FALSE);
240	SV sv = svp ? svp : Nullsv;
241	if (sv)
242	SvREFCNT_dec(sv);
243	}
244
245	SvREFCNT_dec((SV*)padlist);	282	SvREFCNT_dec ((SV*)padlist);
246	}	283	}
247	}	284	}
248	#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))
249		337
250	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
251	STATIC void	339	static void
252	get_padlist (CV *cv)	340	get_padlist (pTHX_ CV *cv)
253	{	341	{
254	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
255		344
256	if (he && AvFILLp ((AV )he) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
257	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
258	else	347	else
259	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
260	}
261
262	STATIC void
263	put_padlist (CV *cv)
264	{
265	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
266
267	if (SvTYPE (*he) != SVt_PVAV)
268	{	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;
269	SvREFCNT_dec (*he);	354	SvREFCNT_dec (cp);
270	he = (SV )newAV ();	355	#else
		356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		357	#endif
271	}	358	}
272
273	av_push ((AV )he, (SV *)CvPADLIST (cv));
274	}	359	}
275		360
276	#ifdef MAY_FLUSH	361	static void
277	STATIC void	362	put_padlist (pTHX_ CV *cv)
278	flush_padlist_cache ()
279	{	363	{
280	HV *hv = padlist_cache;	364	MAGIC *mg = CORO_MAGIC (cv);
281	padlist_cache = newHV ();	365	AV *av;
282		366
283	if (hv_iterinit (hv))	367	if (!mg)
284	{
285	HE *he;
286	AV *padlist;
287
288	while (!!(he = hv_iternext (hv)))
289	{
290	AV av = (AV )HeVAL(he);
291
292	/* casting is fun. */
293	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
294	free_padlist (padlist);
295	}
296	}	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	}
297		374
298	SvREFCNT_dec (hv);	375	av = (AV *)mg->mg_obj;
299	}
300	#endif
301		376
302	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
303	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
304		379
305	#define LOAD(state) load_state(aTHX_ (state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	381	}
307		382
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	383	/ load & save, init *****************************************************/
309		384
310	static void	385	static void
311	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
312	{	387	{
313	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
314	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
315		391
316	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
317	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
318	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
319	PL_stack_sp = c->stack_sp;	395	PL_defoutgv = c->deffh;
320	PL_op = c->op;	396	PL_rs = c->irssv;
321	PL_curpad = c->curpad;	397	GvSV (irsgv) = c->irssv_sv;
322	PL_comppad = c->comppad;
323	PL_stack_base = c->stack_base;
324	PL_stack_max = c->stack_max;
325	PL_tmps_stack = c->tmps_stack;
326	PL_tmps_floor = c->tmps_floor;
327	PL_tmps_ix = c->tmps_ix;
328	PL_tmps_max = c->tmps_max;
329	PL_markstack = c->markstack;
330	PL_markstack_ptr = c->markstack_ptr;
331	PL_markstack_max = c->markstack_max;
332	PL_scopestack = c->scopestack;
333	PL_scopestack_ix = c->scopestack_ix;
334	PL_scopestack_max = c->scopestack_max;
335	PL_savestack = c->savestack;
336	PL_savestack_ix = c->savestack_ix;
337	PL_savestack_max = c->savestack_max;
338	PL_retstack = c->retstack;
339	PL_retstack_ix = c->retstack_ix;
340	PL_retstack_max = c->retstack_max;
341	PL_curcop = c->curcop;
342	PL_top_env = c->top_env;
343
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347		398
348	{	399	{
349	dSP;	400	dSP;
350	CV *cv;	401	CV *cv;
351		402
352	/* now do the ugly restore mess */	403	/* now do the ugly restore mess */
353	while ((cv = (CV *)POPs))	404	while ((cv = (CV *)POPs))
354	{	405	{
355	AV padlist = (AV )POPs;
356
357	if (padlist)
358	{
359	put_padlist (cv); /* mark this padlist as available */	406	put_padlist (aTHX_ cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;	407	CvDEPTH (cv) = PTR2IV (POPs);
361	#ifdef USE_THREADS	408	CvPADLIST (cv) = (AV *)POPs;
362	/CvOWNER(cv) = (struct perl_thread )POPs;*/
363	#endif
364	}
365
366	++CvDEPTH(cv);
367	}	409	}
368		410
369	PUTBACK;	411	PUTBACK;
370	}	412	}
371	}	413	}
372		414
373	static void	415	static void
374	save_state(pTHX_ Coro__State c, int flags)	416	save_perl (pTHX_ Coro__State c)
375	{	417	{
376	{	418	{
377	dSP;	419	dSP;
378	I32 cxix = cxstack_ix;	420	I32 cxix = cxstack_ix;
379	PERL_CONTEXT *ccstk = cxstack;	421	PERL_CONTEXT *ccstk = cxstack;
…		…
382	/*	424	/*
383	* the worst thing you can imagine happens first - we have to save	425	* the worst thing you can imagine happens first - we have to save
384	* (and reinitialize) all cv's in the whole callchain :(	426	* (and reinitialize) all cv's in the whole callchain :(
385	*/	427	*/
386		428
387	PUSHs (Nullsv);	429	XPUSHs (Nullsv);
388	/* this loop was inspired by pp_caller */	430	/* this loop was inspired by pp_caller */
389	for (;;)	431	for (;;)
390	{	432	{
391	while (cxix >= 0)	433	while (cxix >= 0)
392	{	434	{
393	PERL_CONTEXT *cx = &ccstk[cxix--];	435	PERL_CONTEXT *cx = &ccstk[cxix--];
394		436
395	if (CxTYPE(cx) == CXt_SUB)	437	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
396	{	438	{
397	CV *cv = cx->blk_sub.cv;	439	CV *cv = cx->blk_sub.cv;
		440
398	if (CvDEPTH(cv))	441	if (CvDEPTH (cv))
399	{	442	{
400	#ifdef USE_THREADS
401	/XPUSHs ((SV )CvOWNER(cv));*/
402	/CvOWNER(cv) = 0;/
403	/error must unlock this cv etc.. etc.../
404	#endif
405	EXTEND (SP, CvDEPTH(cv)*2);	443	EXTEND (SP, 3);
406
407	while (--CvDEPTH(cv))
408	{
409	/* this tells the restore code to increment CvDEPTH */
410	PUSHs (Nullsv);
411	PUSHs ((SV *)cv);
412	}
413
414	PUSHs ((SV *)CvPADLIST(cv));	444	PUSHs ((SV *)CvPADLIST (cv));
		445	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
415	PUSHs ((SV *)cv);	446	PUSHs ((SV *)cv);
416		447
417	get_padlist (cv); /* this is a monster */	448	CvDEPTH (cv) = 0;
		449	get_padlist (aTHX_ cv);
418	}	450	}
419	}	451	}
420	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)
422	{
423	/* I never used formats, so how should I know how these are implemented? */
424	/* my bold guess is as a simple, plain sub... */
425	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
426	}
427	#endif
428	}	452	}
429		453
430	if (top_si->si_type == PERLSI_MAIN)	454	if (top_si->si_type == PERLSI_MAIN)
431	break;	455	break;
432		456
433	top_si = top_si->si_prev;	457	top_si = top_si->si_prev;
434	ccstk = top_si->si_cxstack;	458	ccstk = top_si->si_cxstack;
435	cxix = top_si->si_cxix;	459	cxix = top_si->si_cxix;
436	}	460	}
437		461
438	PUTBACK;	462	PUTBACK;
439	}	463	}
440		464
441	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	465	c->defav = GvAV (PL_defgv);
442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	466	c->defsv = DEFSV;
443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	467	c->errsv = ERRSV;
		468	c->deffh = PL_defoutgv;
		469	c->irssv = PL_rs;
		470	c->irssv_sv = GvSV (irsgv);
444		471
445	c->dowarn = PL_dowarn;	472	#define VAR(name,type)c->name = PL_ ## name;
446	c->in_eval = PL_in_eval;	473	# include "state.h"
447		474	#undef VAR
448	c->curstackinfo = PL_curstackinfo;
449	c->curstack = PL_curstack;
450	c->mainstack = PL_mainstack;
451	c->stack_sp = PL_stack_sp;
452	c->op = PL_op;
453	c->curpad = PL_curpad;
454	c->comppad = PL_comppad;
455	c->stack_base = PL_stack_base;
456	c->stack_max = PL_stack_max;
457	c->tmps_stack = PL_tmps_stack;
458	c->tmps_floor = PL_tmps_floor;
459	c->tmps_ix = PL_tmps_ix;
460	c->tmps_max = PL_tmps_max;
461	c->markstack = PL_markstack;
462	c->markstack_ptr = PL_markstack_ptr;
463	c->markstack_max = PL_markstack_max;
464	c->scopestack = PL_scopestack;
465	c->scopestack_ix = PL_scopestack_ix;
466	c->scopestack_max = PL_scopestack_max;
467	c->savestack = PL_savestack;
468	c->savestack_ix = PL_savestack_ix;
469	c->savestack_max = PL_savestack_max;
470	c->retstack = PL_retstack;
471	c->retstack_ix = PL_retstack_ix;
472	c->retstack_max = PL_retstack_max;
473	c->curcop = PL_curcop;
474	c->top_env = PL_top_env;
475	}	475	}
476		476
477	/*	477	/*
478	* allocate various perl stacks. This is an exact copy	478	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory	479	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need	480	* on the (sometimes correct) assumption that coroutines do
481	* a lot of stackspace.	481	* not usually need a lot of stackspace.
482	*/	482	*/
483	STATIC void	483	#if CORO_PREFER_PERL_FUNCTIONS
		484	# define coro_init_stacks init_stacks
		485	#else
		486	static void
484	coro_init_stacks (pTHX)	487	coro_init_stacks (pTHX)
485	{	488	{
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	489	PL_curstackinfo = new_stackinfo(64, 6);
487	PL_curstackinfo->si_type = PERLSI_MAIN;	490	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	491	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		493
491	PL_stack_base = AvARRAY(PL_curstack);	494	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	495	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	496	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		497
495	New(50,PL_tmps_stack,96,SV*);	498	New(50,PL_tmps_stack,64,SV*);
496	PL_tmps_floor = -1;	499	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	500	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	501	PL_tmps_max = 64;
499		502
500	New(54,PL_markstack,16,I32);	503	New(54,PL_markstack,16,I32);
501	PL_markstack_ptr = PL_markstack;	504	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	505	PL_markstack_max = PL_markstack + 16;
503		506
…		…
507		510
508	New(54,PL_scopestack,16,I32);	511	New(54,PL_scopestack,16,I32);
509	PL_scopestack_ix = 0;	512	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	513	PL_scopestack_max = 16;
511		514
512	New(54,PL_savestack,96,ANY);	515	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	516	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	517	PL_savestack_max = 64;
515		518
		519	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	520	New(54,PL_retstack,4,OP*);
517	PL_retstack_ix = 0;	521	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	522	PL_retstack_max = 4;
		523	#endif
519	}	524	}
		525	#endif
520		526
521	/*	527	/*
522	* destroy the stacks, the callchain etc...	528	* destroy the stacks, the callchain etc...
523	* still there is a memleak of 128 bytes...
524	*/	529	*/
525	STATIC void	530	static void
526	destroy_stacks(pTHX)	531	coro_destroy_stacks (pTHX)
527	{	532	{
528	if (!IN_DESTRUCT)
529	{
530	/* is this ugly, I ask? */
531	while (PL_scopestack_ix)
532	LEAVE;
533
534	/* sure it is, but more important: is it correct?? :/ */
535	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
536	FREETMPS;
537	}
538
539	while (PL_curstackinfo->si_next)	533	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;	534	PL_curstackinfo = PL_curstackinfo->si_next;
541		535
542	while (PL_curstackinfo)	536	while (PL_curstackinfo)
543	{	537	{
544	PERL_SI *p = PL_curstackinfo->si_prev;	538	PERL_SI *p = PL_curstackinfo->si_prev;
545		539
546	{
547	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */
550	}
551
552	if (!IN_DESTRUCT)	540	if (!IN_DESTRUCT)
553	{
554	dounwind(-1);
555	SvREFCNT_dec(PL_curstackinfo->si_stack);	541	SvREFCNT_dec (PL_curstackinfo->si_stack);
556	}
557		542
558	Safefree(PL_curstackinfo->si_cxstack);	543	Safefree (PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);	544	Safefree (PL_curstackinfo);
560	PL_curstackinfo = p;	545	PL_curstackinfo = p;
561	}	546	}
562		547
563	Safefree(PL_tmps_stack);	548	Safefree (PL_tmps_stack);
564	Safefree(PL_markstack);	549	Safefree (PL_markstack);
565	Safefree(PL_scopestack);	550	Safefree (PL_scopestack);
566	Safefree(PL_savestack);	551	Safefree (PL_savestack);
		552	#if !PERL_VERSION_ATLEAST (5,9,0)
567	Safefree(PL_retstack);	553	Safefree (PL_retstack);
568	}
569
570	static void
571	allocate_stack (Coro__State ctx, int alloc)
572	{
573	coro_stack *stack;
574
575	New (0, stack, 1, coro_stack);
576
577	stack->refcnt = 1;
578	stack->usecnt = 1;
579	stack->gencnt = ctx->gencnt = 0;
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif	554	#endif
		555	}
		556
		557	static size_t
		558	coro_rss (pTHX_ struct coro *coro)
		559	{
		560	size_t rss = sizeof (coro);
		561
		562	if (coro->mainstack)
		563	{
		564	if (coro->flags & CF_RUNNING)
587	{	565	{
588	/FIXME//D//* reasonable stack size! */	566	#define VAR(name,type)coro->name = PL_ ## name;
589	stack->ssize = -4096 * sizeof (long);	567	# include "state.h"
590	New (0, stack->sptr, 4096, long);	568	#undef VAR
591	}	569	}
592	}
593	else
594	stack->sptr = 0;
595		570
596	ctx->stack = stack;	571	rss += sizeof (coro->curstackinfo);
597	}	572	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		573	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		574	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		575	rss += coro->tmps_max * sizeof (SV *);
		576	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		577	rss += coro->scopestack_max * sizeof (I32);
		578	rss += coro->savestack_max * sizeof (ANY);
598		579
599	static void	580	#if !PERL_VERSION_ATLEAST (5,9,0)
600	deallocate_stack (Coro__State ctx)	581	rss += coro->retstack_max * sizeof (OP *);
601	{	582	#endif
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{	583	}
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#else
615	Safefree (stack->sptr);
616	#endif
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623		584
		585	return rss;
		586	}
		587
		588	/ coroutine stack handling **********************************************/
		589
624	static void	590	static void
625	setup_coro (void *arg)	591	coro_setup (pTHX_ struct coro *coro)
626	{	592	{
627	/*	593	/*
628	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
629	*/	595	*/
		596	coro_init_stacks (aTHX);
		597
		598	PL_runops = RUNOPS_DEFAULT;
		599	PL_curcop = &PL_compiling;
		600	PL_in_eval = EVAL_NULL;
		601	PL_comppad = 0;
		602	PL_curpm = 0;
		603	PL_localizing = 0;
		604	PL_dirty = 0;
		605	PL_restartop = 0;
		606
		607	GvSV (PL_defgv) = NEWSV (0, 0);
		608	GvAV (PL_defgv) = coro->args; coro->args = 0;
		609	GvSV (PL_errgv) = NEWSV (0, 0);
		610	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		611	PL_rs = newSVsv (GvSV (irsgv));
		612
		613	{
		614	IO *io = newIO ();
		615	PL_defoutgv = newGVgen ("Coro");
		616	GvIOp(PL_defoutgv) = io;
		617	IoTYPE (io) = IoTYPE_WRONLY;
		618	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		619	IoFLAGS (io) \|= IOf_FLUSH;
		620	}
		621
		622	{
		623	dSP;
		624	LOGOP myop;
		625
		626	Zero (&myop, 1, LOGOP);
		627	myop.op_next = Nullop;
		628	myop.op_flags = OPf_WANT_VOID;
		629
		630	PUSHMARK (SP);
		631	XPUSHs (av_shift (GvAV (PL_defgv)));
		632	PUTBACK;
		633	PL_op = (OP *)&myop;
		634	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		635	SPAGAIN;
		636	}
		637
		638	ENTER; /* necessary e.g. for dounwind */
		639	}
		640
		641	static void
		642	coro_destroy (pTHX_ struct coro *coro)
		643	{
		644	if (!IN_DESTRUCT)
		645	{
		646	/* restore all saved variables and stuff */
		647	LEAVE_SCOPE (0);
		648	assert (PL_tmps_floor == -1);
		649
		650	/* free all temporaries */
		651	FREETMPS;
		652	assert (PL_tmps_ix == -1);
		653
		654	/* unwind all extra stacks */
		655	POPSTACK_TO (PL_mainstack);
		656
		657	/* unwind main stack */
		658	dounwind (-1);
		659	}
		660
		661	SvREFCNT_dec (GvSV (PL_defgv));
		662	SvREFCNT_dec (GvAV (PL_defgv));
		663	SvREFCNT_dec (GvSV (PL_errgv));
		664	SvREFCNT_dec (PL_defoutgv);
		665	SvREFCNT_dec (PL_rs);
		666	SvREFCNT_dec (GvSV (irsgv));
		667
		668	SvREFCNT_dec (coro->asp_deffh);
		669	//SvREFCNT_dec (coro->throw);
		670
		671	coro_destroy_stacks (aTHX);
		672	}
		673
		674	static void
		675	free_coro_mortal (pTHX)
		676	{
		677	if (coro_mortal)
		678	{
		679	SvREFCNT_dec (coro_mortal);
		680	coro_mortal = 0;
		681	}
		682	}
		683
		684	static int
		685	runops_trace (pTHX)
		686	{
		687	COP *oldcop = 0;
		688	int oldcxix = -2;
		689	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		690	coro_cctx *cctx = coro->cctx;
		691
		692	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		693	{
		694	PERL_ASYNC_CHECK ();
		695
		696	if (cctx->flags & CC_TRACE_ALL)
		697	{
		698	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		699	{
		700	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		701	SV bot, top;
		702	AV av = newAV (); / return values */
		703	SV **cb;
		704	dSP;
		705
		706	GV *gv = CvGV (cx->blk_sub.cv);
		707	SV *fullname = sv_2mortal (newSV (0));
		708	if (isGV (gv))
		709	gv_efullname3 (fullname, gv, 0);
		710
		711	bot = PL_stack_base + cx->blk_oldsp + 1;
		712	top = cx->blk_gimme == G_ARRAY ? SP + 1
		713	: cx->blk_gimme == G_SCALAR ? bot + 1
		714	: bot;
		715
		716	while (bot < top)
		717	av_push (av, SvREFCNT_inc (*bot++));
		718
		719	PL_runops = RUNOPS_DEFAULT;
		720	ENTER;
		721	SAVETMPS;
		722	EXTEND (SP, 3);
		723	PUSHMARK (SP);
		724	PUSHs (&PL_sv_no);
		725	PUSHs (fullname);
		726	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		727	PUTBACK;
		728	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		729	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		730	SPAGAIN;
		731	FREETMPS;
		732	LEAVE;
		733	PL_runops = runops_trace;
		734	}
		735
		736	if (oldcop != PL_curcop)
		737	{
		738	oldcop = PL_curcop;
		739
		740	if (PL_curcop != &PL_compiling)
		741	{
		742	SV **cb;
		743
		744	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		745	{
		746	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		747
		748	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		749	{
		750	runops_proc_t old_runops = PL_runops;
		751	dSP;
		752	GV *gv = CvGV (cx->blk_sub.cv);
		753	SV *fullname = sv_2mortal (newSV (0));
		754
		755	if (isGV (gv))
		756	gv_efullname3 (fullname, gv, 0);
		757
		758	PL_runops = RUNOPS_DEFAULT;
		759	ENTER;
		760	SAVETMPS;
		761	EXTEND (SP, 3);
		762	PUSHMARK (SP);
		763	PUSHs (&PL_sv_yes);
		764	PUSHs (fullname);
		765	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		766	PUTBACK;
		767	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		768	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		769	SPAGAIN;
		770	FREETMPS;
		771	LEAVE;
		772	PL_runops = runops_trace;
		773	}
		774
		775	oldcxix = cxstack_ix;
		776	}
		777
		778	if (cctx->flags & CC_TRACE_LINE)
		779	{
		780	dSP;
		781
		782	PL_runops = RUNOPS_DEFAULT;
		783	ENTER;
		784	SAVETMPS;
		785	EXTEND (SP, 3);
		786	PL_runops = RUNOPS_DEFAULT;
		787	PUSHMARK (SP);
		788	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		789	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		790	PUTBACK;
		791	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		792	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		793	SPAGAIN;
		794	FREETMPS;
		795	LEAVE;
		796	PL_runops = runops_trace;
		797	}
		798	}
		799	}
		800	}
		801	}
		802
		803	TAINT_NOT;
		804	return 0;
		805	}
		806
		807	/* inject a fake call to Coro::State::_cctx_init into the execution */
		808	/* _cctx_init should be careful, as it could be called at almost any time */
		809	/* during execution of a perl program */
		810	static void NOINLINE
		811	prepare_cctx (pTHX_ coro_cctx *cctx)
		812	{
630	dSP;	813	dSP;
631	Coro__State ctx = (Coro__State)arg;	814	LOGOP myop;
632	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
633		815
634	coro_init_stacks (aTHX);	816	PL_top_env = &PL_start_env;
635	/PL_curcop = 0;/
636	/PL_in_eval = PL_in_eval;/ /* inherit */
637	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args;
639		817
		818	if (cctx->flags & CC_TRACE)
		819	PL_runops = runops_trace;
		820
		821	Zero (&myop, 1, LOGOP);
		822	myop.op_next = PL_op;
		823	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		824
		825	PUSHMARK (SP);
		826	EXTEND (SP, 2);
		827	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		828	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		829	PUTBACK;
		830	PL_op = (OP *)&myop;
		831	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640	SPAGAIN;	832	SPAGAIN;
		833	}
641		834
642	if (ctx->stack)	835	/*
643	{	836	* this is a _very_ stripped down perl interpreter ;)
644	ctx->cursp = 0;	837	*/
		838	static void
		839	coro_run (void *arg)
		840	{
		841	dTHX;
645		842
646	PUSHMARK(SP);	843	/* coro_run is the alternative tail of transfer(), so unlock here. */
647	PUTBACK;	844	UNLOCK;
648	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
649		845
650	if (SvTRUE (ERRSV))	846	/* we now skip the entersub that lead to transfer() */
651	croak (NULL);	847	PL_op = PL_op->op_next;
652	else	848
653	croak ("FATAL: CCTXT coroutine returned!");	849	/* inject a fake subroutine call to cctx_init */
		850	prepare_cctx (aTHX_ (coro_cctx *)arg);
		851
		852	/* somebody or something will hit me for both perl_run and PL_restartop */
		853	PL_restartop = PL_op;
		854	perl_run (PL_curinterp);
		855
		856	/*
		857	* If perl-run returns we assume exit() was being called or the coro
		858	* fell off the end, which seems to be the only valid (non-bug)
		859	* reason for perl_run to return. We try to exit by jumping to the
		860	* bootstrap-time "top" top_env, as we cannot restore the "main"
		861	* coroutine as Coro has no such concept
		862	*/
		863	PL_top_env = main_top_env;
		864	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		865	}
		866
		867	static coro_cctx *
		868	cctx_new ()
		869	{
		870	coro_cctx *cctx;
		871	void *stack_start;
		872	size_t stack_size;
		873
		874	++cctx_count;
		875
		876	Newz (0, cctx, 1, coro_cctx);
		877
		878	#if HAVE_MMAP
		879
		880	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		881	/* mmap supposedly does allocate-on-write for us */
		882	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		883
		884	if (cctx->sptr != (void *)-1)
		885	{
		886	# if CORO_STACKGUARD
		887	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		888	# endif
		889	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		890	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		891	cctx->flags \|= CC_MAPPED;
654	}	892	}
655	else	893	else
656	{	894	#endif
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);
662	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;
664
665	PUSHMARK(SP);
666	XPUSHs (sub_init);
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;
677
678	ENTER; /* necessary e.g. for dounwind */
679	}	895	{
680	}	896	cctx->ssize = coro_stacksize * (long)sizeof (long);
		897	New (0, cctx->sptr, coro_stacksize, long);
681		898
682	static void	899	if (!cctx->sptr)
683	continue_coro (void *arg)	900	{
684	{	901	perror ("FATAL: unable to allocate stack for coroutine");
685	/*	902	_exit (EXIT_FAILURE);
686	* this is a _very_ stripped down perl interpreter ;)	903	}
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690		904
691	PL_top_env = &ctx->start_env;	905	stack_start = cctx->sptr;
		906	stack_size = cctx->ssize;
		907	}
692		908
693	ctx->cursp = 0;	909	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
694	PL_op = PL_op->op_next;	910	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
695	CALLRUNOPS(aTHX);
696		911
697	abort ();	912	return cctx;
698	}	913	}
699		914
700	STATIC void	915	static void
		916	cctx_destroy (coro_cctx *cctx)
		917	{
		918	if (!cctx)
		919	return;
		920
		921	--cctx_count;
		922
		923	#if CORO_USE_VALGRIND
		924	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		925	#endif
		926
		927	#if HAVE_MMAP
		928	if (cctx->flags & CC_MAPPED)
		929	munmap (cctx->sptr, cctx->ssize);
		930	else
		931	#endif
		932	Safefree (cctx->sptr);
		933
		934	Safefree (cctx);
		935	}
		936
		937	static coro_cctx *
		938	cctx_get (pTHX)
		939	{
		940	while (cctx_first)
		941	{
		942	coro_cctx *cctx = cctx_first;
		943	cctx_first = cctx->next;
		944	--cctx_idle;
		945
		946	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		947	return cctx;
		948
		949	cctx_destroy (cctx);
		950	}
		951
		952	return cctx_new ();
		953	}
		954
		955	static void
		956	cctx_put (coro_cctx *cctx)
		957	{
		958	/* free another cctx if overlimit */
		959	if (cctx_idle >= MAX_IDLE_CCTX)
		960	{
		961	coro_cctx *first = cctx_first;
		962	cctx_first = first->next;
		963	--cctx_idle;
		964
		965	cctx_destroy (first);
		966	}
		967
		968	++cctx_idle;
		969	cctx->next = cctx_first;
		970	cctx_first = cctx;
		971	}
		972
		973	/ coroutine switching ***************************************************/
		974
		975	static void NOINLINE
		976	transfer_check (pTHX_ struct coro prev, struct coro next)
		977	{
		978	if (prev != next)
		979	{
		980	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		981	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		982
		983	if (next->flags & CF_RUNNING)
		984	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		985
		986	if (next->flags & CF_DESTROYED)
		987	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		988
		989	if (PL_lex_state != LEX_NOTPARSING)
		990	croak ("Coro::State::transfer called while parsing, but this is not supported");
		991	}
		992	}
		993
		994	/* always use the TRANSFER macro */
		995	static void NOINLINE
701	transfer(pTHX_ struct coro prev, struct coro next, int flags)	996	transfer (pTHX_ struct coro prev, struct coro next)
702	{	997	{
703	dSTACKLEVEL;	998	dSTACKLEVEL;
704	static struct coro *xnext;
705		999
		1000	/* sometimes transfer is only called to set idle_sp */
		1001	if (!next)
		1002	{
		1003	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1004	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1005	}
706	if (prev != next)	1006	else if (prev != next)
707	{	1007	{
708	xnext = next;	1008	coro_cctx *prev__cctx;
709		1009
710	if (next->mainstack)	1010	if (prev->flags & CF_NEW)
711	{	1011	{
712	SAVE (prev, flags);	1012	/* create a new empty context */
713	LOAD (next);	1013	Newz (0, prev->cctx, 1, coro_cctx);
714		1014	prev->flags &= ~CF_NEW;
715	/* mark this state as in-use */	1015	prev->flags \|= CF_RUNNING;
716	next->mainstack = 0;
717	next->tmps_ix = -2;
718
719	/* stacklevel changed? if yes, grab the stack for us! */
720	if (flags & TRANSFER_SAVE_CCTXT)
721	{
722	if (!prev->stack)
723	allocate_stack (prev, 0);
724	else if (prev->cursp != stacklevel
725	&& prev->stack->usecnt > 1)
726	{
727	prev->gencnt = ++prev->stack->gencnt;
728	prev->stack->usecnt = 1;
729	}
730
731	/* has our stack been invalidated? */
732	if (next->stack && next->stack->gencnt != next->gencnt)
733	{
734	deallocate_stack (next);
735	allocate_stack (next, 1);
736	coro_create (&(next->stack->cctx),
737	continue_coro, (void *)next,
738	next->stack->sptr, labs (next->stack->ssize));
739	}
740
741	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
742	/* don't add any code here */
743	}
744
745	}	1016	}
746	else if (next->tmps_ix == -2)	1017
747	croak ("tried to transfer to running coroutine");	1018	prev->flags &= ~CF_RUNNING;
		1019	next->flags \|= CF_RUNNING;
		1020
		1021	LOCK;
		1022
		1023	if (next->flags & CF_NEW)
		1024	{
		1025	/* need to start coroutine */
		1026	next->flags &= ~CF_NEW;
		1027	/* first get rid of the old state */
		1028	save_perl (aTHX_ prev);
		1029	/* setup coroutine call */
		1030	coro_setup (aTHX_ next);
		1031	}
748	else	1032	else
749	{	1033	{
750	SAVE (prev, -1); /* first get rid of the old state */	1034	/* coroutine already started */
751		1035	save_perl (aTHX_ prev);
752	if (flags & TRANSFER_SAVE_CCTXT)	1036	load_perl (aTHX_ next);
753	{
754	if (!prev->stack)
755	allocate_stack (prev, 0);
756
757	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
758	{
759	PL_top_env = &next->start_env;
760
761	setup_coro (next);
762
763	prev->stack->refcnt++;
764	prev->stack->usecnt++;
765	next->stack = prev->stack;
766	next->gencnt = prev->gencnt;
767	}
768	else
769	{
770	allocate_stack (next, 1);
771	coro_create (&(next->stack->cctx),
772	setup_coro, (void *)next,
773	next->stack->sptr, labs (next->stack->ssize));
774	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
775	/* don't add any code here */
776	}
777	}
778	else
779	setup_coro (next);
780	}	1037	}
781		1038
782	/*	1039	prev__cctx = prev->cctx;
783	* xnext is now either prev or next, depending on wether	1040
784	* we switched the c stack or not. that's why I use a global	1041	/* possibly "free" the cctx */
785	* variable, that should become thread-specific at one point.	1042	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
786	*/	1043	{
787	xnext->cursp = stacklevel;	1044	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
788	}	1045	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
789		1046
790	if (coro_mortal)	1047	prev->cctx = 0;
		1048
		1049	cctx_put (prev__cctx);
		1050	}
		1051
		1052	++next->usecount;
		1053
		1054	if (!next->cctx)
		1055	next->cctx = cctx_get (aTHX);
		1056
		1057	if (prev__cctx != next->cctx)
		1058	{
		1059	prev__cctx->top_env = PL_top_env;
		1060	PL_top_env = next->cctx->top_env;
		1061	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1062	}
		1063
		1064	free_coro_mortal (aTHX);
		1065	UNLOCK;
791	{	1066	}
792	SvREFCNT_dec (coro_mortal);	1067	}
793	coro_mortal = 0;	1068
		1069	struct transfer_args
		1070	{
		1071	struct coro prev, next;
		1072	};
		1073
		1074	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1075	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1076
		1077	/ high level stuff ******************************************************/
		1078
		1079	static int
		1080	coro_state_destroy (pTHX_ struct coro *coro)
		1081	{
		1082	if (coro->flags & CF_DESTROYED)
		1083	return 0;
		1084
		1085	coro->flags \|= CF_DESTROYED;
		1086
		1087	if (coro->flags & CF_READY)
794	}	1088	{
795	}	1089	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1090	/* alternative: look through all ready queues and remove the coro */
		1091	LOCK;
		1092	--coro_nready;
		1093	UNLOCK;
		1094	}
		1095	else
		1096	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
796		1097
797	#define SV_CORO(sv,func) \	1098	if (coro->mainstack && coro->mainstack != main_mainstack)
798	do { \	1099	{
799	if (SvROK (sv)) \	1100	struct coro temp;
800	sv = SvRV (sv); \
801	\
802	if (SvTYPE(sv) == SVt_PVHV) \
803	{ \
804	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
805	\
806	if (!he) \
807	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808	\
809	(sv) = SvRV (HeVAL(he)); \
810	} \
811	\
812	/* must also be changed inside Coro::Cont::yield */ \
813	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
814	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
815	\
816	} while(0)
817		1101
818	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1102	if (coro->flags & CF_RUNNING)
		1103	croak ("FATAL: tried to destroy currently running coroutine");
819		1104
		1105	save_perl (aTHX_ &temp);
		1106	load_perl (aTHX_ coro);
		1107
		1108	coro_destroy (aTHX_ coro);
		1109
		1110	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1111
		1112	coro->mainstack = 0;
		1113	}
		1114
		1115	cctx_destroy (coro->cctx);
		1116	SvREFCNT_dec (coro->args);
		1117
		1118	if (coro->next) coro->next->prev = coro->prev;
		1119	if (coro->prev) coro->prev->next = coro->next;
		1120	if (coro == coro_first) coro_first = coro->next;
		1121
		1122	return 1;
		1123	}
		1124
820	static void	1125	static int
		1126	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1127	{
		1128	struct coro coro = (struct coro )mg->mg_ptr;
		1129	mg->mg_ptr = 0;
		1130
		1131	coro->hv = 0;
		1132
		1133	if (--coro->refcnt < 0)
		1134	{
		1135	coro_state_destroy (aTHX_ coro);
		1136	Safefree (coro);
		1137	}
		1138
		1139	return 0;
		1140	}
		1141
		1142	static int
		1143	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1144	{
		1145	struct coro coro = (struct coro )mg->mg_ptr;
		1146
		1147	++coro->refcnt;
		1148
		1149	return 0;
		1150	}
		1151
		1152	static MGVTBL coro_state_vtbl = {
		1153	0, 0, 0, 0,
		1154	coro_state_free,
		1155	0,
		1156	#ifdef MGf_DUP
		1157	coro_state_dup,
		1158	#else
		1159	# define MGf_DUP 0
		1160	#endif
		1161	};
		1162
		1163	static void
		1164	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1165	{
		1166	ta->prev = SvSTATE (prev_sv);
		1167	ta->next = SvSTATE (next_sv);
		1168	TRANSFER_CHECK (*ta);
		1169	}
		1170
		1171	static void
821	api_transfer(pTHX_ SV prev, SV next, int flags)	1172	api_transfer (SV prev_sv, SV next_sv)
822	{	1173	{
823	SV_CORO (prev, "Coro::transfer");	1174	dTHX;
824	SV_CORO (next, "Coro::transfer");	1175	struct transfer_args ta;
825		1176
826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1177	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1178	TRANSFER (ta);
827	}	1179	}
828		1180
829	/ Coro ******************************************************************/	1181	/ Coro ******************************************************************/
830		1182
831	#define PRIO_MAX 3
832	#define PRIO_HIGH 1
833	#define PRIO_NORMAL 0
834	#define PRIO_LOW -1
835	#define PRIO_IDLE -3
836	#define PRIO_MIN -4
837
838	/* for Coro.pm */
839	static GV coro_current, coro_idle;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;
842
843	static void	1183	static void
844	coro_enq (SV *sv)	1184	coro_enq (pTHX_ SV *coro_sv)
845	{	1185	{
846	if (SvTYPE (sv) == SVt_PVHV)
847	{
848	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
849	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
850
851	prio = prio > PRIO_MAX ? PRIO_MAX
852	: prio < PRIO_MIN ? PRIO_MIN
853	: prio;
854
855	av_push (coro_ready [prio - PRIO_MIN], sv);	1186	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
856	coro_nready++;
857
858	return;
859	}
860
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");
862	}	1187	}
863		1188
864	static SV *	1189	static SV *
865	coro_deq (int min_prio)	1190	coro_deq (pTHX_ int min_prio)
866	{	1191	{
867	int prio = PRIO_MAX - PRIO_MIN;	1192	int prio = PRIO_MAX - PRIO_MIN;
868		1193
869	min_prio -= PRIO_MIN;	1194	min_prio -= PRIO_MIN;
870	if (min_prio < 0)	1195	if (min_prio < 0)
871	min_prio = 0;	1196	min_prio = 0;
872		1197
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1198	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)	1199	if (AvFILLp (coro_ready [prio]) >= 0)
875	{
876	coro_nready--;
877	return av_shift (coro_ready[prio]);	1200	return av_shift (coro_ready [prio]);
878	}
879		1201
880	return 0;	1202	return 0;
881	}	1203	}
882		1204
883	static void	1205	static int
884	api_ready (SV *coro)	1206	api_ready (SV *coro_sv)
885	{	1207	{
		1208	dTHX;
		1209	struct coro *coro;
		1210
886	if (SvROK (coro))	1211	if (SvROK (coro_sv))
887	coro = SvRV (coro);	1212	coro_sv = SvRV (coro_sv);
888		1213
		1214	coro = SvSTATE (coro_sv);
		1215
		1216	if (coro->flags & CF_READY)
		1217	return 0;
		1218
		1219	coro->flags \|= CF_READY;
		1220
		1221	LOCK;
889	coro_enq (SvREFCNT_inc (coro));	1222	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1223	++coro_nready;
		1224	UNLOCK;
		1225
		1226	return 1;
		1227	}
		1228
		1229	static int
		1230	api_is_ready (SV *coro_sv)
		1231	{
		1232	dTHX;
		1233	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1234	}
		1235
		1236	static void
		1237	prepare_schedule (pTHX_ struct transfer_args *ta)
		1238	{
		1239	SV prev_sv, next_sv;
		1240
		1241	for (;;)
		1242	{
		1243	LOCK;
		1244	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1245
		1246	/* nothing to schedule: call the idle handler */
		1247	if (!next_sv)
		1248	{
		1249	dSP;
		1250	UNLOCK;
		1251
		1252	ENTER;
		1253	SAVETMPS;
		1254
		1255	PUSHMARK (SP);
		1256	PUTBACK;
		1257	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1258
		1259	FREETMPS;
		1260	LEAVE;
		1261	continue;
		1262	}
		1263
		1264	ta->next = SvSTATE (next_sv);
		1265
		1266	/* cannot transfer to destroyed coros, skip and look for next */
		1267	if (ta->next->flags & CF_DESTROYED)
		1268	{
		1269	UNLOCK;
		1270	SvREFCNT_dec (next_sv);
		1271	/* coro_nready is already taken care of by destroy */
		1272	continue;
		1273	}
		1274
		1275	--coro_nready;
		1276	UNLOCK;
		1277	break;
		1278	}
		1279
		1280	/* free this only after the transfer */
		1281	prev_sv = SvRV (coro_current);
		1282	ta->prev = SvSTATE (prev_sv);
		1283	TRANSFER_CHECK (*ta);
		1284	assert (ta->next->flags & CF_READY);
		1285	ta->next->flags &= ~CF_READY;
		1286	SvRV_set (coro_current, next_sv);
		1287
		1288	LOCK;
		1289	free_coro_mortal (aTHX);
		1290	coro_mortal = prev_sv;
		1291	UNLOCK;
		1292	}
		1293
		1294	static void
		1295	prepare_cede (pTHX_ struct transfer_args *ta)
		1296	{
		1297	api_ready (coro_current);
		1298	prepare_schedule (aTHX_ ta);
		1299	}
		1300
		1301	static int
		1302	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1303	{
		1304	if (coro_nready)
		1305	{
		1306	SV *prev = SvRV (coro_current);
		1307	prepare_schedule (aTHX_ ta);
		1308	api_ready (prev);
		1309	return 1;
		1310	}
		1311	else
		1312	return 0;
890	}	1313	}
891		1314
892	static void	1315	static void
893	api_schedule (void)	1316	api_schedule (void)
894	{	1317	{
895	SV prev, next;	1318	dTHX;
		1319	struct transfer_args ta;
896		1320
897	prev = SvRV (GvSV (coro_current));	1321	prepare_schedule (aTHX_ &ta);
898	next = coro_deq (PRIO_MIN);	1322	TRANSFER (ta);
899
900	if (!next)
901	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
902
903	/* free this only after the transfer */
904	coro_mortal = prev;
905	SV_CORO (prev, "Coro::schedule");
906
907	SvRV (GvSV (coro_current)) = next;
908
909	SV_CORO (next, "Coro::schedule");
910
911	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
912	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
913	}	1323	}
914		1324
915	static void	1325	static int
916	api_cede (void)	1326	api_cede (void)
917	{	1327	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1328	dTHX;
		1329	struct transfer_args ta;
919		1330
920	api_schedule ();	1331	prepare_cede (aTHX_ &ta);
921	}
922		1332
		1333	if (ta.prev != ta.next)
		1334	{
		1335	TRANSFER (ta);
		1336	return 1;
		1337	}
		1338	else
		1339	return 0;
		1340	}
		1341
		1342	static int
		1343	api_cede_notself (void)
		1344	{
		1345	dTHX;
		1346	struct transfer_args ta;
		1347
		1348	if (prepare_cede_notself (aTHX_ &ta))
		1349	{
		1350	TRANSFER (ta);
		1351	return 1;
		1352	}
		1353	else
		1354	return 0;
		1355	}
		1356
		1357	static void
		1358	api_trace (SV *coro_sv, int flags)
		1359	{
		1360	dTHX;
		1361	struct coro *coro = SvSTATE (coro_sv);
		1362
		1363	if (flags & CC_TRACE)
		1364	{
		1365	if (!coro->cctx)
		1366	coro->cctx = cctx_new ();
		1367	else if (!(coro->cctx->flags & CC_TRACE))
		1368	croak ("cannot enable tracing on coroutine with custom stack");
		1369
		1370	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1371	}
		1372	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1373	{
		1374	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1375
		1376	if (coro->flags & CF_RUNNING)
		1377	PL_runops = RUNOPS_DEFAULT;
		1378	else
		1379	coro->runops = RUNOPS_DEFAULT;
		1380	}
		1381	}
		1382
923	MODULE = Coro::State PACKAGE = Coro::State	1383	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
924		1384
925	PROTOTYPES: ENABLE	1385	PROTOTYPES: DISABLE
926		1386
927	BOOT:	1387	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	1388	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1389	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1390	MUTEX_INIT (&coro_mutex);
		1391	#endif
		1392	BOOT_PAGESIZE;
		1393
		1394	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1395
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1396	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1397
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1399	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1400	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1401	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
937
938	if (!padlist_cache)
939	padlist_cache = newHV ();
940		1402
941	main_mainstack = PL_mainstack;	1403	main_mainstack = PL_mainstack;
		1404	main_top_env = PL_top_env;
		1405
		1406	while (main_top_env->je_prev)
		1407	main_top_env = main_top_env->je_prev;
942		1408
943	coroapi.ver = CORO_API_VERSION;	1409	coroapi.ver = CORO_API_VERSION;
944	coroapi.transfer = api_transfer;	1410	coroapi.transfer = api_transfer;
945	}
946		1411
947	Coro::State	1412	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
948	_newprocess(args)	1413	}
949	SV * args	1414
950	PROTOTYPE: $	1415	SV *
		1416	new (char *klass, ...)
951	CODE:	1417	CODE:
952	Coro__State coro;	1418	{
		1419	struct coro *coro;
		1420	HV *hv;
		1421	int i;
953		1422
954	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
955	croak ("Coro::State::_newprocess expects an arrayref");
956
957	New (0, coro, 1, struct coro);	1423	Newz (0, coro, 1, struct coro);
		1424	coro->args = newAV ();
		1425	coro->flags = CF_NEW;
958		1426
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1427	if (coro_first) coro_first->prev = coro;
960	coro->mainstack = 0; /* actual work is done inside transfer */	1428	coro->next = coro_first;
961	coro->stack = 0;	1429	coro_first = coro;
962		1430
963	/* same as JMPENV_BOOTSTRAP */	1431	coro->hv = hv = newHV ();
964	/* we might be able to recycle start_env, but safe is safe */	1432	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
965	Zero(&coro->start_env, 1, JMPENV);	1433	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
966	coro->start_env.je_ret = -1;
967	coro->start_env.je_mustcatch = TRUE;
968		1434
969	RETVAL = coro;	1435	for (i = 1; i < items; i++)
		1436	av_push (coro->args, newSVsv (ST (i)));
		1437	}
970	OUTPUT:	1438	OUTPUT:
971	RETVAL	1439	RETVAL
972		1440
		1441	# these not obviously related functions are all rolled into the same xs
		1442	# function to increase chances that they all will call transfer with the same
		1443	# stack offset
973	void	1444	void
974	transfer(prev, next, flags)	1445	_set_stacklevel (...)
975	SV *prev	1446	ALIAS:
976	SV *next	1447	Coro::State::transfer = 1
977	int flags	1448	Coro::schedule = 2
978	PROTOTYPE: @	1449	Coro::cede = 3
		1450	Coro::cede_notself = 4
979	CODE:	1451	CODE:
980	PUTBACK;	1452	{
981	SV_CORO (next, "Coro::transfer");	1453	struct transfer_args ta;
982	SV_CORO (prev, "Coro::transfer");	1454
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1455	switch (ix)
984	SPAGAIN;	1456	{
		1457	case 0:
		1458	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1459	ta.next = 0;
		1460	break;
		1461
		1462	case 1:
		1463	if (items != 2)
		1464	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1465
		1466	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1467	break;
		1468
		1469	case 2:
		1470	prepare_schedule (aTHX_ &ta);
		1471	break;
		1472
		1473	case 3:
		1474	prepare_cede (aTHX_ &ta);
		1475	break;
		1476
		1477	case 4:
		1478	if (!prepare_cede_notself (aTHX_ &ta))
		1479	XSRETURN_EMPTY;
		1480
		1481	break;
		1482	}
		1483
		1484	BARRIER;
		1485	TRANSFER (ta);
		1486
		1487	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1488	XSRETURN_YES;
		1489	}
		1490
		1491	bool
		1492	_destroy (SV *coro_sv)
		1493	CODE:
		1494	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1495	OUTPUT:
		1496	RETVAL
985		1497
986	void	1498	void
987	DESTROY(coro)
988	Coro::State coro
989	CODE:
990
991	if (coro->mainstack && coro->mainstack != main_mainstack)
992	{
993	struct coro temp;
994
995	PUTBACK;
996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
997	LOAD(aTHX_ coro);
998	SPAGAIN;
999
1000	destroy_stacks (aTHX);
1001
1002	LOAD((&temp)); /* this will get rid of defsv etc.. */
1003	SPAGAIN;
1004
1005	coro->mainstack = 0;
1006	}
1007
1008	deallocate_stack (coro);
1009
1010	Safefree (coro);
1011
1012	void
1013	flush()
1014	CODE:
1015	#ifdef MAY_FLUSH
1016	flush_padlist_cache ();
1017	#endif
1018
1019	void
1020	_exit(code)	1499	_exit (code)
1021	int code	1500	int code
1022	PROTOTYPE: $	1501	PROTOTYPE: $
1023	CODE:	1502	CODE:
1024	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
1025	_exit (code);	1503	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1504
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1505	int
		1506	cctx_stacksize (int new_stacksize = 0)
		1507	CODE:
		1508	RETVAL = coro_stacksize;
		1509	if (new_stacksize)
		1510	coro_stacksize = new_stacksize;
		1511	OUTPUT:
		1512	RETVAL
1033		1513
1034	# this is slightly dirty (should expose a c-level api)	1514	int
		1515	cctx_count ()
		1516	CODE:
		1517	RETVAL = cctx_count;
		1518	OUTPUT:
		1519	RETVAL
		1520
		1521	int
		1522	cctx_idle ()
		1523	CODE:
		1524	RETVAL = cctx_idle;
		1525	OUTPUT:
		1526	RETVAL
1035		1527
1036	void	1528	void
1037	yield(...)	1529	list ()
1038	PROTOTYPE: @	1530	PPCODE:
		1531	{
		1532	struct coro *coro;
		1533	for (coro = coro_first; coro; coro = coro->next)
		1534	if (coro->hv)
		1535	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1536	}
		1537
		1538	void
		1539	call (Coro::State coro, SV *coderef)
		1540	ALIAS:
		1541	eval = 1
		1542	CODE:
		1543	{
		1544	if (coro->mainstack)
		1545	{
		1546	struct coro temp;
		1547	Zero (&temp, 1, struct coro);
		1548
		1549	if (!(coro->flags & CF_RUNNING))
		1550	{
		1551	save_perl (aTHX_ &temp);
		1552	load_perl (aTHX_ coro);
		1553	}
		1554
		1555	{
		1556	dSP;
		1557	ENTER;
		1558	SAVETMPS;
		1559	PUSHMARK (SP);
		1560	PUTBACK;
		1561	if (ix)
		1562	eval_sv (coderef, 0);
		1563	else
		1564	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1565	SPAGAIN;
		1566	FREETMPS;
		1567	LEAVE;
		1568	PUTBACK;
		1569	}
		1570
		1571	if (!(coro->flags & CF_RUNNING))
		1572	{
		1573	save_perl (aTHX_ coro);
		1574	load_perl (aTHX_ &temp);
		1575	}
		1576	}
		1577	}
		1578
		1579	SV *
		1580	is_ready (Coro::State coro)
		1581	PROTOTYPE: $
		1582	ALIAS:
		1583	is_ready = CF_READY
		1584	is_running = CF_RUNNING
		1585	is_new = CF_NEW
		1586	is_destroyed = CF_DESTROYED
		1587	CODE:
		1588	RETVAL = boolSV (coro->flags & ix);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1594
		1595	SV *
		1596	has_stack (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = boolSV (!!coro->cctx);
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	int
		1604	is_traced (Coro::State coro)
		1605	PROTOTYPE: $
		1606	CODE:
		1607	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1608	OUTPUT:
		1609	RETVAL
		1610
		1611	IV
		1612	rss (Coro::State coro)
		1613	PROTOTYPE: $
		1614	ALIAS:
		1615	usecount = 1
1039	CODE:	1616	CODE:
1040	static SV *returnstk;	1617	switch (ix)
1041	SV *sv;	1618	{
1042	AV *defav = GvAV (PL_defgv);	1619	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1043	struct coro prev, next;	1620	case 1: RETVAL = coro->usecount; break;
		1621	}
		1622	OUTPUT:
		1623	RETVAL
1044		1624
1045	if (!returnstk)
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048	/* set up @_ -- ugly */
1049	av_clear (defav);
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1057	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1625
1062	MODULE = Coro::State PACKAGE = Coro	1626	MODULE = Coro::State PACKAGE = Coro
1063		1627
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1628	BOOT:
1067	{	1629	{
1068	int i;	1630	int i;
		1631
		1632	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1633	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1634	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1635
		1636	coro_current = get_sv ("Coro::current", FALSE);
		1637	SvREADONLY_on (coro_current);
		1638
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1639	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1640
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1641	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1642	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1643	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1644	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1645	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1646	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1647
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1648	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1649	coro_ready[i] = newAV ();
1083		1650
1084	{	1651	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1652	SV *sv = perl_get_sv("Coro::API", 1);
1086		1653
1087	coroapi.schedule = api_schedule;	1654	coroapi.schedule = api_schedule;
1088	coroapi.cede = api_cede;	1655	coroapi.cede = api_cede;
		1656	coroapi.cede_notself = api_cede_notself;
1089	coroapi.ready = api_ready;	1657	coroapi.ready = api_ready;
		1658	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1659	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1660	coroapi.current = coro_current;
1092		1661
1093	GCoroAPI = &coroapi;	1662	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1663	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1664	SvREADONLY_on (sv);
1096	}	1665	}
1097	}	1666	}
1098		1667
1099	void	1668	void
1100	ready(self)	1669	_set_current (SV *current)
1101	SV * self
1102	PROTOTYPE: $	1670	PROTOTYPE: $
1103	CODE:	1671	CODE:
1104	api_ready (self);	1672	SvREFCNT_dec (SvRV (coro_current));
		1673	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1105		1674
1106	int	1675	int
		1676	prio (Coro::State coro, int newprio = 0)
		1677	ALIAS:
		1678	nice = 1
		1679	CODE:
		1680	{
		1681	RETVAL = coro->prio;
		1682
		1683	if (items > 1)
		1684	{
		1685	if (ix)
		1686	newprio = coro->prio - newprio;
		1687
		1688	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1689	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1690
		1691	coro->prio = newprio;
		1692	}
		1693	}
		1694	OUTPUT:
		1695	RETVAL
		1696
		1697	SV *
		1698	ready (SV *self)
		1699	PROTOTYPE: $
		1700	CODE:
		1701	RETVAL = boolSV (api_ready (self));
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	int
1107	nready(...)	1706	nready (...)
1108	PROTOTYPE:	1707	PROTOTYPE:
1109	CODE:	1708	CODE:
1110	RETVAL = coro_nready;	1709	RETVAL = coro_nready;
1111	OUTPUT:	1710	OUTPUT:
1112	RETVAL	1711	RETVAL
1113		1712
		1713	# for async_pool speedup
1114	void	1714	void
1115	schedule(...)	1715	_pool_1 (SV *cb)
1116	PROTOTYPE:
1117	CODE:	1716	CODE:
1118	api_schedule ();	1717	{
		1718	struct coro *coro = SvSTATE (coro_current);
		1719	HV hv = (HV )SvRV (coro_current);
		1720	AV *defav = GvAV (PL_defgv);
		1721	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1722	AV *invoke_av;
		1723	int i, len;
		1724
		1725	if (!invoke)
		1726	croak ("\3terminate\2\n");
		1727
		1728	SvREFCNT_dec (coro->asp_deffh);
		1729	coro->asp_deffh = SvREFCNT_inc (PL_defoutgv);
		1730
		1731	hv_store (hv, "desc", sizeof ("desc") - 1,
		1732	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1733
		1734	invoke_av = (AV *)SvRV (invoke);
		1735	len = av_len (invoke_av);
		1736
		1737	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1738
		1739	if (len > 0)
		1740	{
		1741	av_fill (defav, len - 1);
		1742	for (i = 0; i < len; ++i)
		1743	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1744	}
		1745
		1746	SvREFCNT_dec (invoke);
		1747	}
1119		1748
1120	void	1749	void
1121	cede(...)	1750	_pool_2 (SV *cb)
1122	PROTOTYPE:
1123	CODE:	1751	CODE:
1124	api_cede ();	1752	{
		1753	struct coro *coro = SvSTATE (coro_current);
1125		1754
		1755	sv_setsv (cb, &PL_sv_undef);
		1756
		1757	SvREFCNT_dec (PL_defoutgv); PL_defoutgv = coro->asp_deffh;
		1758	coro->asp_deffh = 0;
		1759
		1760	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1761	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1762	croak ("\3terminate\2\n");
		1763
		1764	av_clear (GvAV (PL_defgv));
		1765	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1767
		1768	coro->prio = 0;
		1769
		1770	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1771	api_trace (coro_current, 0);
		1772
		1773	av_push (av_async_pool, newSVsv (coro_current));
		1774	}
		1775
		1776
		1777	MODULE = Coro::State PACKAGE = Coro::AIO
		1778
		1779	SV *
		1780	_get_state ()
		1781	CODE:
		1782	{
		1783	struct io_state *data;
		1784
		1785	RETVAL = newSV (sizeof (struct io_state));
		1786	data = (struct io_state *)SvPVX (RETVAL);
		1787	SvCUR_set (RETVAL, sizeof (struct io_state));
		1788	SvPOK_only (RETVAL);
		1789
		1790	data->errorno = errno;
		1791	data->laststype = PL_laststype;
		1792	data->laststatval = PL_laststatval;
		1793	data->statcache = PL_statcache;
		1794	}
		1795	OUTPUT:
		1796	RETVAL
		1797
		1798	void
		1799	_set_state (char *data_)
		1800	PROTOTYPE: $
		1801	CODE:
		1802	{
		1803	struct io_state data = (void )data_;
		1804
		1805	errno = data->errorno;
		1806	PL_laststype = data->laststype;
		1807	PL_laststatval = data->laststatval;
		1808	PL_statcache = data->statcache;
		1809	}
		1810

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Comparing Coro/Coro/State.xs (file contents): Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs. Revision 1.182 by root, Wed Oct 3 18:37:48 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.182 by root, Wed Oct 3 18:37:48 2007 UTC