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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.51 by pcg, Sun Nov 30 17:03:48 2003 UTC vs.
Revision 1.171 by root, Sat Sep 29 19:42:10 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "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 SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
45	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
46		83
47	/* The next macro should declare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
48	* to the current C stack pointer. Its property is that it changes with each call	85	# define CORO_STACKGUARD 0
49	* 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
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
51		97
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		99
54	#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))
55		109
56	#include "CoroAPI.h"	110	#include "CoroAPI.h"
57		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;
58	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 */
59		136
60	/* this is actually not only the c stack but also c registers etc... */	137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		152	};
		153
		154	/* this is a structure representing a c-level coroutine */
61	typedef struct {	155	typedef struct coro_cctx {
62	int refcnt; /* pointer reference counter */	156	struct coro_cctx *next;
63	int usecnt; /* shared by how many coroutines */
64	int gencnt; /* generation counter */
65		157
		158	/* the stack */
		159	void *sptr;
		160	size_t ssize;
		161
		162	/* cpu state */
		163	void idle_sp; / sp of top-level transfer/schedule/cede call */
		164	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		165	JMPENV *top_env;
66	coro_context cctx;	166	coro_context cctx;
67		167
68	void *sptr;	168	#if CORO_USE_VALGRIND
69	long ssize; /* positive == mmap, otherwise malloc */	169	int valgrind_id;
70	} coro_stack;	170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
71		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
		180
		181	/* this is a structure representing a perl-level coroutine */
72	struct coro {	182	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	183	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;	184	coro_cctx *cctx;
75
76	/* the optional C context */
77	coro_stack *stack;
78	void *cursp;
79	int gencnt;
80
81	/* optionally saved, might be zero */
82	AV *defav;
83	SV *defsv;
84	SV *errsv;
85
86	/* saved global state not related to stacks */
87	U8 dowarn;
88	I32 in_eval;
89
90	/* the stacks and related info (callchain etc..) */
91	PERL_SI *curstackinfo;
92	AV *curstack;
93	AV *mainstack;
94	SV **stack_sp;
95	OP *op;
96	SV **curpad;
97	AV *comppad;
98	SV **stack_base;
99	SV **stack_max;
100	SV **tmps_stack;
101	I32 tmps_floor;
102	I32 tmps_ix;
103	I32 tmps_max;
104	I32 *markstack;
105	I32 *markstack_ptr;
106	I32 *markstack_max;
107	I32 *scopestack;
108	I32 scopestack_ix;
109	I32 scopestack_max;
110	ANY *savestack;
111	I32 savestack_ix;
112	I32 savestack_max;
113	OP **retstack;
114	I32 retstack_ix;
115	I32 retstack_max;
116	COP *curcop;
117	JMPENV *top_env;
118		185
119	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
120	AV *args;	187	AV *args;
		188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
		191
		192	/* optionally saved, might be zero */
		193	AV defav; / @_ */
		194	SV defsv; / $_ */
		195	SV errsv; / $@ */
		196	GV deffh; / default filehandle */
		197	SV irssv; / $/ */
		198	SV irssv_sv; / real $/ cache */
		199
		200	#define VAR(name,type) type name;
		201	# include "state.h"
		202	#undef VAR
		203
		204	/* coro process data */
		205	int prio;
		206
		207	/* linked list */
		208	struct coro next, prev;
		209	HV hv; / the perl hash associated with this coro, if any */
121	};	210	};
122		211
123	typedef struct coro *Coro__State;	212	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	213	typedef struct coro *Coro__State_or_hashref;
125		214
126	static AV main_mainstack; / used to differentiate between $main and others */	215	/ Coro ******************************************************************/
127	static HV *coro_state_stash;
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV coro_mortal; / will be freed after next transfer */
132		216
133	/* mostly copied from op.c:cv_clone2 */	217	#define PRIO_MAX 3
134	STATIC AV *	218	#define PRIO_HIGH 1
135	clone_padlist (AV *protopadlist)	219	#define PRIO_NORMAL 0
		220	#define PRIO_LOW -1
		221	#define PRIO_IDLE -3
		222	#define PRIO_MIN -4
		223
		224	/* for Coro.pm */
		225	static SV *coro_current;
		226	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		227	static int coro_nready;
		228	static struct coro *coro_first;
		229
		230	/ lowlevel stuff ********************************************************/
		231
		232	static AV *
		233	coro_clone_padlist (pTHX_ CV *cv)
136	{	234	{
137	AV *av;	235	AV *padlist = CvPADLIST (cv);
138	I32 ix;
139	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
140	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
141	SV **pname = AvARRAY (protopad_name);
142	SV **ppad = AvARRAY (protopad);
143	I32 fname = AvFILLp (protopad_name);
144	I32 fpad = AvFILLp (protopad);
145	AV newpadlist, newpad_name, *newpad;	236	AV newpadlist, newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		237
156	newpadlist = newAV ();	238	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	239	AvREAL_off (newpadlist);
158	av_store (newpadlist, 0, (SV *) newpad_name);	240	#if PERL_VERSION_ATLEAST (5,9,0)
		241	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		242	#else
		243	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		244	#endif
		245	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		246	--AvFILLp (padlist);
		247
		248	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
159	av_store (newpadlist, 1, (SV *) newpad);	249	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char name = SvPVX (namesv); / XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
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
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		250
226	return newpadlist;	251	return newpadlist;
227	}	252	}
228		253
229	STATIC void	254	static void
230	free_padlist (AV *padlist)	255	free_padlist (pTHX_ AV *padlist)
231	{	256	{
232	/* may be during global destruction */	257	/* may be during global destruction */
233	if (SvREFCNT (padlist))	258	if (SvREFCNT (padlist))
234	{	259	{
235	I32 i = AvFILLp (padlist);	260	I32 i = AvFILLp (padlist);
…		…
248		273
249	SvREFCNT_dec ((SV*)padlist);	274	SvREFCNT_dec ((SV*)padlist);
250	}	275	}
251	}	276	}
252		277
253	STATIC int	278	static int
254	coro_cv_free (SV sv, MAGIC mg)	279	coro_cv_free (pTHX_ SV sv, MAGIC mg)
255	{	280	{
256	AV *padlist;	281	AV *padlist;
257	AV av = (AV )mg->mg_obj;	282	AV av = (AV )mg->mg_obj;
258		283
259	/* casting is fun. */	284	/* casting is fun. */
260	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	285	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
261	free_padlist (padlist);	286	free_padlist (aTHX_ padlist);
		287
		288	SvREFCNT_dec (av);
		289
		290	return 0;
262	}	291	}
263		292
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	293	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		294
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	295	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		296
		297	#define CORO_MAGIC(cv) \
		298	SvMAGIC (cv) \
		299	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		300	? SvMAGIC (cv) \
		301	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		302	: 0
		303
		304	static struct coro *
		305	SvSTATE_ (pTHX_ SV *coro)
		306	{
		307	HV *stash;
		308	MAGIC *mg;
		309
		310	if (SvROK (coro))
		311	coro = SvRV (coro);
		312
		313	stash = SvSTASH (coro);
		314	if (stash != coro_stash && stash != coro_state_stash)
		315	{
		316	/* very slow, but rare, check */
		317	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		318	croak ("Coro::State object required");
		319	}
		320
		321	mg = CORO_MAGIC (coro);
		322	return (struct coro *)mg->mg_ptr;
		323	}
		324
		325	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		326
268	/* the next two functions merely cache the padlists */	327	/* the next two functions merely cache the padlists */
269	STATIC void	328	static void
270	get_padlist (CV *cv)	329	get_padlist (pTHX_ CV *cv)
271	{	330	{
272	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	331	MAGIC *mg = CORO_MAGIC (cv);
		332	AV *av;
273		333
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	334	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
275	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	335	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276	else	336	else
		337	{
		338	#if CORO_PREFER_PERL_FUNCTIONS
		339	/* this is probably cleaner, but also slower? */
		340	CV *cp = Perl_cv_clone (cv);
		341	CvPADLIST (cv) = CvPADLIST (cp);
		342	CvPADLIST (cp) = 0;
		343	SvREFCNT_dec (cp);
		344	#else
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	345	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		346	#endif
		347	}
278	}	348	}
279		349
280	STATIC void	350	static void
281	put_padlist (CV *cv)	351	put_padlist (pTHX_ CV *cv)
282	{	352	{
283	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	353	MAGIC *mg = CORO_MAGIC (cv);
		354	AV *av;
284		355
285	if (!mg)	356	if (!mg)
286	{	357	{
287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	358	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	359	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289	mg->mg_virtual = &vtbl_coro;	360	mg->mg_virtual = &vtbl_coro;
290	mg->mg_obj = (SV *)newAV ();	361	mg->mg_obj = (SV *)newAV ();
291	}	362	}
292		363
293	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	364	av = (AV *)mg->mg_obj;
		365
		366	if (AvFILLp (av) >= AvMAX (av))
		367	av_extend (av, AvMAX (av) + 1);
		368
		369	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
294	}	370	}
		371
		372	/ load & save, init *****************************************************/
295		373
296	#define SB do {	374	#define SB do {
297	#define SE } while (0)	375	#define SE } while (0)
298		376
299	#define LOAD(state) load_state(aTHX_ (state));
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
301
302	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	377	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
303		378
304	static void	379	static void
305	load_state(pTHX_ Coro__State c)	380	load_perl (pTHX_ Coro__State c)
306	{	381	{
307	PL_dowarn = c->dowarn;	382	#define VAR(name,type) PL_ ## name = c->name;
308	PL_in_eval = c->in_eval;	383	# include "state.h"
309		384	#undef VAR
310	PL_curstackinfo = c->curstackinfo;
311	PL_curstack = c->curstack;
312	PL_mainstack = c->mainstack;
313	PL_stack_sp = c->stack_sp;
314	PL_op = c->op;
315	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;
317	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;
322	PL_tmps_max = c->tmps_max;
323	PL_markstack = c->markstack;
324	PL_markstack_ptr = c->markstack_ptr;
325	PL_markstack_max = c->markstack_max;
326	PL_scopestack = c->scopestack;
327	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;
332	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;
335	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337		385
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	386	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	387	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	388	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		389	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		390
		391	if (c->irssv)
		392	{
		393	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		394	{
		395	SvREFCNT_dec (c->irssv);
		396	c->irssv = 0;
		397	}
		398	else
		399	{
		400	REPLACE_SV (PL_rs, c->irssv);
		401	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		402	sv_setsv (c->irssv_sv, PL_rs);
		403	}
		404	}
341		405
342	{	406	{
343	dSP;	407	dSP;
344	CV *cv;	408	CV *cv;
345		409
346	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
347	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
348	{	412	{
349	AV padlist = (AV )POPs;
350
351	if (padlist)
352	{
353	put_padlist (cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
355	#ifdef USE_THREADS	415	CvPADLIST (cv) = (AV *)POPs;
356	/CvOWNER(cv) = (struct perl_thread )POPs;*/
357	#endif
358	}
359
360	++CvDEPTH(cv);
361	}	416	}
362		417
363	PUTBACK;	418	PUTBACK;
364	}	419	}
365	}	420	}
366		421
367	static void	422	static void
368	save_state(pTHX_ Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
369	{	424	{
370	{	425	{
371	dSP;	426	dSP;
372	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
376	/*	431	/*
377	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
378	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
379	*/	434	*/
380		435
381	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
382	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
383	for (;;)	438	for (;;)
384	{	439	{
385	while (cxix >= 0)	440	while (cxix >= 0)
386	{	441	{
387	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
388		443
389	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
390	{	445	{
391	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
392	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
393	{	449	{
394	#ifdef USE_THREADS
395	/XPUSHs ((SV )CvOWNER(cv));*/
396	/CvOWNER(cv) = 0;/
397	/error must unlock this cv etc.. etc.../
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	450	EXTEND (SP, 3);
400
401	while (--CvDEPTH(cv))
402	{
403	/* this tells the restore code to increment CvDEPTH */
404	PUSHs (Nullsv);
405	PUSHs ((SV *)cv);
406	}
407
408	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
409	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
410		454
411	get_padlist (cv); /* this is a monster */	455	CvDEPTH (cv) = 0;
		456	get_padlist (aTHX_ cv);
412	}	457	}
413	}	458	}
414	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)
416	{
417	/* I never used formats, so how should I know how these are implemented? */
418	/* my bold guess is as a simple, plain sub... */
419	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420	}
421	#endif
422	}	459	}
423		460
424	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
425	break;	462	break;
426		463
427	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
428	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
429	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
430	}	467	}
431		468
432	PUTBACK;	469	PUTBACK;
433	}	470	}
434		471
435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		475	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		476	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
438		477
439	c->dowarn = PL_dowarn;	478	#define VAR(name,type)c->name = PL_ ## name;
440	c->in_eval = PL_in_eval;	479	# include "state.h"
441		480	#undef VAR
442	c->curstackinfo = PL_curstackinfo;
443	c->curstack = PL_curstack;
444	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;
446	c->op = PL_op;
447	c->curpad = PL_curpad;
448	c->comppad = PL_comppad;
449	c->stack_base = PL_stack_base;
450	c->stack_max = PL_stack_max;
451	c->tmps_stack = PL_tmps_stack;
452	c->tmps_floor = PL_tmps_floor;
453	c->tmps_ix = PL_tmps_ix;
454	c->tmps_max = PL_tmps_max;
455	c->markstack = PL_markstack;
456	c->markstack_ptr = PL_markstack_ptr;
457	c->markstack_max = PL_markstack_max;
458	c->scopestack = PL_scopestack;
459	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;
464	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;
467	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	481	}
470		482
471	/*	483	/*
472	* allocate various perl stacks. This is an exact copy	484	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	485	* of perl.c:init_stacks, except that it uses less memory
474	* on the assumption that coroutines do not usually need	486	* on the (sometimes correct) assumption that coroutines do
475	* a lot of stackspace.	487	* not usually need a lot of stackspace.
476	*/	488	*/
477	STATIC void	489	#if CORO_PREFER_PERL_FUNCTIONS
		490	# define coro_init_stacks init_stacks
		491	#else
		492	static void
478	coro_init_stacks (pTHX)	493	coro_init_stacks (pTHX)
479	{	494	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	495	PL_curstackinfo = new_stackinfo(64, 6);
481	PL_curstackinfo->si_type = PERLSI_MAIN;	496	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	497	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	498	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484		499
485	PL_stack_base = AvARRAY(PL_curstack);	500	PL_stack_base = AvARRAY(PL_curstack);
486	PL_stack_sp = PL_stack_base;	501	PL_stack_sp = PL_stack_base;
487	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	502	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488		503
489	New(50,PL_tmps_stack,96,SV*);	504	New(50,PL_tmps_stack,64,SV*);
490	PL_tmps_floor = -1;	505	PL_tmps_floor = -1;
491	PL_tmps_ix = -1;	506	PL_tmps_ix = -1;
492	PL_tmps_max = 96;	507	PL_tmps_max = 64;
493		508
494	New(54,PL_markstack,16,I32);	509	New(54,PL_markstack,16,I32);
495	PL_markstack_ptr = PL_markstack;	510	PL_markstack_ptr = PL_markstack;
496	PL_markstack_max = PL_markstack + 16;	511	PL_markstack_max = PL_markstack + 16;
497		512
…		…
501		516
502	New(54,PL_scopestack,16,I32);	517	New(54,PL_scopestack,16,I32);
503	PL_scopestack_ix = 0;	518	PL_scopestack_ix = 0;
504	PL_scopestack_max = 16;	519	PL_scopestack_max = 16;
505		520
506	New(54,PL_savestack,96,ANY);	521	New(54,PL_savestack,64,ANY);
507	PL_savestack_ix = 0;	522	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	523	PL_savestack_max = 64;
509		524
		525	#if !PERL_VERSION_ATLEAST (5,9,0)
510	New(54,PL_retstack,8,OP*);	526	New(54,PL_retstack,4,OP*);
511	PL_retstack_ix = 0;	527	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	528	PL_retstack_max = 4;
		529	#endif
513	}	530	}
		531	#endif
514		532
515	/*	533	/*
516	* destroy the stacks, the callchain etc...	534	* destroy the stacks, the callchain etc...
517	*/	535	*/
518	STATIC void	536	static void
519	destroy_stacks(pTHX)	537	coro_destroy_stacks (pTHX)
520	{	538	{
521	if (!IN_DESTRUCT)	539	if (!IN_DESTRUCT)
522	{	540	{
523	/* is this ugly, I ask? */	541	/* restore all saved variables and stuff */
524	while (PL_scopestack_ix)	542	LEAVE_SCOPE (0);
525	LEAVE;	543	assert (PL_tmps_floor == -1);
526		544
527	/* sure it is, but more important: is it correct?? :/ */	545	/* free all temporaries */
528	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
529	FREETMPS;	546	FREETMPS;
		547	assert (PL_tmps_ix == -1);
		548
		549	/* unwind all extra stacks */
		550	POPSTACK_TO (PL_mainstack);
		551
		552	/* unwind main stack */
		553	dounwind (-1);
530	}	554	}
531		555
532	while (PL_curstackinfo->si_next)	556	while (PL_curstackinfo->si_next)
533	PL_curstackinfo = PL_curstackinfo->si_next;	557	PL_curstackinfo = PL_curstackinfo->si_next;
534		558
535	while (PL_curstackinfo)	559	while (PL_curstackinfo)
536	{	560	{
537	PERL_SI *p = PL_curstackinfo->si_prev;	561	PERL_SI *p = PL_curstackinfo->si_prev;
538		562
539	{
540	dSP;
541	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
542	PUTBACK; /* possibly superfluous */
543	}
544
545	if (!IN_DESTRUCT)	563	if (!IN_DESTRUCT)
546	{
547	dounwind(-1);
548	SvREFCNT_dec(PL_curstackinfo->si_stack);	564	SvREFCNT_dec (PL_curstackinfo->si_stack);
549	}
550		565
551	Safefree(PL_curstackinfo->si_cxstack);	566	Safefree (PL_curstackinfo->si_cxstack);
552	Safefree(PL_curstackinfo);	567	Safefree (PL_curstackinfo);
553	PL_curstackinfo = p;	568	PL_curstackinfo = p;
554	}	569	}
555		570
556	Safefree(PL_tmps_stack);	571	Safefree (PL_tmps_stack);
557	Safefree(PL_markstack);	572	Safefree (PL_markstack);
558	Safefree(PL_scopestack);	573	Safefree (PL_scopestack);
559	Safefree(PL_savestack);	574	Safefree (PL_savestack);
		575	#if !PERL_VERSION_ATLEAST (5,9,0)
560	Safefree(PL_retstack);	576	Safefree (PL_retstack);
		577	#endif
561	}	578	}
		579
		580	static size_t
		581	coro_rss (pTHX_ struct coro *coro)
		582	{
		583	size_t rss = sizeof (coro);
		584
		585	if (coro->mainstack)
		586	{
		587	if (coro->flags & CF_RUNNING)
		588	{
		589	#define VAR(name,type)coro->name = PL_ ## name;
		590	# include "state.h"
		591	#undef VAR
		592	}
		593
		594	rss += sizeof (coro->curstackinfo);
		595	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		596	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		597	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		598	rss += coro->tmps_max * sizeof (SV *);
		599	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		600	rss += coro->scopestack_max * sizeof (I32);
		601	rss += coro->savestack_max * sizeof (ANY);
		602
		603	#if !PERL_VERSION_ATLEAST (5,9,0)
		604	rss += coro->retstack_max * sizeof (OP *);
		605	#endif
		606	}
		607
		608	return rss;
		609	}
		610
		611	/ coroutine stack handling **********************************************/
562		612
563	static void	613	static void
564	allocate_stack (Coro__State ctx, int alloc)	614	setup_coro (pTHX_ struct coro *coro)
565	{
566	coro_stack *stack;
567
568	New (0, stack, 1, coro_stack);
569
570	stack->refcnt = 1;
571	stack->usecnt = 1;
572	stack->gencnt = ctx->gencnt = 0;
573	if (alloc)
574	{
575	#if HAVE_MMAP
576	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
577	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
578	if (stack->sptr == (void *)-1)
579	#endif
580	{
581	/FIXME//D//* reasonable stack size! */
582	stack->ssize = - (16384 * sizeof (long));
583	New (0, stack->sptr, 16384, long);
584	}
585	}
586	else
587	stack->sptr = 0;
588
589	ctx->stack = stack;
590	}
591
592	static void
593	deallocate_stack (Coro__State ctx)
594	{
595	coro_stack *stack = ctx->stack;
596
597	ctx->stack = 0;
598
599	if (stack)
600	{
601	if (!--stack->refcnt)
602	{
603	#ifdef HAVE_MMAP
604	if (stack->ssize > 0 && stack->sptr)
605	munmap (stack->sptr, stack->ssize);
606	else
607	#endif
608	Safefree (stack->sptr);
609
610	Safefree (stack);
611	}
612	else if (ctx->gencnt == stack->gencnt)
613	--stack->usecnt;
614	}
615	}
616
617	static void
618	setup_coro (void *arg)
619	{	615	{
620	/*	616	/*
621	* emulate part of the perl startup here.	617	* emulate part of the perl startup here.
622	*/	618	*/
		619	coro_init_stacks (aTHX);
		620
		621	PL_runops = RUNOPS_DEFAULT;
		622	PL_curcop = &PL_compiling;
		623	PL_in_eval = EVAL_NULL;
		624	PL_comppad = 0;
		625	PL_curpm = 0;
		626	PL_localizing = 0;
		627	PL_dirty = 0;
		628	PL_restartop = 0;
		629
		630	{
		631	dSP;
		632	LOGOP myop;
		633
		634	SvREFCNT_dec (GvAV (PL_defgv));
		635	GvAV (PL_defgv) = coro->args; coro->args = 0;
		636
		637	Zero (&myop, 1, LOGOP);
		638	myop.op_next = Nullop;
		639	myop.op_flags = OPf_WANT_VOID;
		640
		641	PUSHMARK (SP);
		642	XPUSHs (av_shift (GvAV (PL_defgv)));
		643	PUTBACK;
		644	PL_op = (OP *)&myop;
		645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		646	SPAGAIN;
		647	}
		648
		649	ENTER; /* necessary e.g. for dounwind */
		650	}
		651
		652	static void
		653	free_coro_mortal (pTHX)
		654	{
		655	if (coro_mortal)
		656	{
		657	SvREFCNT_dec (coro_mortal);
		658	coro_mortal = 0;
		659	}
		660	}
		661
		662	static int
		663	runops_trace (pTHX)
		664	{
		665	COP *oldcop = 0;
		666	int oldcxix = -2;
		667	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		668	coro_cctx *cctx = coro->cctx;
		669
		670	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		671	{
		672	PERL_ASYNC_CHECK ();
		673
		674	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		675	{
		676	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		677	SV bot, top;
		678	AV av = newAV (); / return values */
		679	SV **cb;
		680	runops_proc_t old_runops = PL_runops;
		681	dSP;
		682	ENTER;
		683	SAVETMPS;
		684	EXTEND (SP, 3);
		685	PL_runops = RUNOPS_DEFAULT;
		686
		687	GV *gv = CvGV (cx->blk_sub.cv);
		688	SV *fullname = sv_2mortal (newSV (0));
		689	if (isGV (gv))
		690	gv_efullname3 (fullname, gv, 0);
		691
		692	bot = PL_stack_base + cx->blk_oldsp + 1;
		693	top = cx->blk_gimme == G_ARRAY ? SP + 1
		694	: cx->blk_gimme == G_SCALAR ? bot + 1
		695	: bot;
		696
		697	while (bot < top)
		698	av_push (av, SvREFCNT_inc (*bot++));
		699
		700	PUSHMARK (SP);
		701	PUSHs (&PL_sv_no);
		702	PUSHs (fullname);
		703	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		704	PUTBACK;
		705	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		706	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		707	SPAGAIN;
		708
		709	FREETMPS;
		710	LEAVE;
		711	PL_runops = old_runops;
		712	}
		713
		714	if (oldcop != PL_curcop)
		715	{
		716	oldcop = PL_curcop;
		717
		718	if (PL_curcop != &PL_compiling)
		719	{
		720	SV **cb;
		721	runops_proc_t old_runops = PL_runops;
		722	dSP;
		723	ENTER;
		724	SAVETMPS;
		725	EXTEND (SP, 3);
		726	PL_runops = RUNOPS_DEFAULT;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	GV *gv = CvGV (cx->blk_sub.cv);
		735	SV *fullname = sv_2mortal (newSV (0));
		736	if (isGV (gv))
		737	gv_efullname3 (fullname, gv, 0);
		738
		739	PUSHMARK (SP);
		740	PUSHs (&PL_sv_yes);
		741	PUSHs (fullname);
		742	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		743	PUTBACK;
		744	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		745	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		746	SPAGAIN;
		747	}
		748
		749	oldcxix = cxstack_ix;
		750	}
		751
		752	if (cctx->flags & CC_TRACE_LINE)
		753	{
		754	PUSHMARK (SP);
		755	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		756	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		757	PUTBACK;
		758	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		759	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		760	SPAGAIN;
		761	}
		762
		763	FREETMPS;
		764	LEAVE;
		765	PL_runops = old_runops;
		766	}
		767	}
		768	}
		769
		770	TAINT_NOT;
		771	return 0;
		772	}
		773
		774	/* inject a fake call to Coro::State::_cctx_init into the execution */
		775	/* _cctx_init should be careful, as it could be called at almost any time */
		776	/* during execution of a perl program */
		777	static void NOINLINE
		778	prepare_cctx (pTHX_ coro_cctx *cctx)
		779	{
623	dSP;	780	dSP;
624	Coro__State ctx = (Coro__State)arg;	781	LOGOP myop;
625	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
626		782
627	coro_init_stacks (aTHX);	783	PL_top_env = &PL_start_env;
628	/PL_curcop = 0;/
629	/PL_in_eval = PL_in_eval;/ /* inherit */
630	SvREFCNT_dec (GvAV (PL_defgv));
631	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
632		784
		785	if (cctx->flags & CC_TRACE)
		786	PL_runops = runops_trace;
		787
		788	Zero (&myop, 1, LOGOP);
		789	myop.op_next = PL_op;
		790	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		791
		792	PUSHMARK (SP);
		793	EXTEND (SP, 2);
		794	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		795	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		796	PUTBACK;
		797	PL_op = (OP *)&myop;
		798	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
633	SPAGAIN;	799	SPAGAIN;
		800	}
634		801
635	if (ctx->stack)	802	/*
636	{	803	* this is a _very_ stripped down perl interpreter ;)
637	ctx->cursp = 0;	804	*/
		805	static void
		806	coro_run (void *arg)
		807	{
		808	dTHX;
638		809
639	PUSHMARK(SP);	810	/* coro_run is the alternative tail of transfer(), so unlock here. */
640	PUTBACK;	811	UNLOCK;
641	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
642		812
643	if (SvTRUE (ERRSV))	813	/* we now skip the entersub that lead to transfer() */
644	croak (NULL);	814	PL_op = PL_op->op_next;
645	else	815
646	croak ("FATAL: CCTXT coroutine returned!");	816	/* inject a fake subroutine call to cctx_init */
		817	prepare_cctx (aTHX_ (coro_cctx *)arg);
		818
		819	/* somebody or something will hit me for both perl_run and PL_restartop */
		820	PL_restartop = PL_op;
		821	perl_run (PL_curinterp);
		822
		823	/*
		824	* If perl-run returns we assume exit() was being called or the coro
		825	* fell off the end, which seems to be the only valid (non-bug)
		826	* reason for perl_run to return. We try to exit by jumping to the
		827	* bootstrap-time "top" top_env, as we cannot restore the "main"
		828	* coroutine as Coro has no such concept
		829	*/
		830	PL_top_env = main_top_env;
		831	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		832	}
		833
		834	static coro_cctx *
		835	cctx_new ()
		836	{
		837	coro_cctx *cctx;
		838	void *stack_start;
		839	size_t stack_size;
		840
		841	++cctx_count;
		842
		843	Newz (0, cctx, 1, coro_cctx);
		844
		845	#if HAVE_MMAP
		846
		847	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		848	/* mmap supposedly does allocate-on-write for us */
		849	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		850
		851	if (cctx->sptr != (void *)-1)
		852	{
		853	# if CORO_STACKGUARD
		854	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		855	# endif
		856	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		857	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		858	cctx->flags \|= CC_MAPPED;
647	}	859	}
648	else	860	else
649	{	861	#endif
650	UNOP myop;
651
652	PL_op = (OP *)&myop;
653
654	Zero(&myop, 1, UNOP);
655	myop.op_next = Nullop;
656	myop.op_flags = OPf_WANT_VOID;
657
658	PUSHMARK(SP);
659	XPUSHs (sub_init);
660	/*
661	* the next line is slightly wrong, as PL_op->op_next
662	* is actually being executed so we skip the first op.
663	* that doesn't matter, though, since it is only
664	* pp_nextstate and we never return...
665	* ah yes, and I don't care anyways ;)
666	*/
667	PUTBACK;
668	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
669	SPAGAIN;
670
671	ENTER; /* necessary e.g. for dounwind */
672	}	862	{
		863	cctx->ssize = coro_stacksize * (long)sizeof (long);
		864	New (0, cctx->sptr, coro_stacksize, long);
		865
		866	if (!cctx->sptr)
		867	{
		868	perror ("FATAL: unable to allocate stack for coroutine");
		869	_exit (EXIT_FAILURE);
		870	}
		871
		872	stack_start = cctx->sptr;
		873	stack_size = cctx->ssize;
		874	}
		875
		876	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		877	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		878
		879	return cctx;
673	}	880	}
674		881
675	static void	882	static void
676	continue_coro (void *arg)	883	cctx_destroy (coro_cctx *cctx)
677	{	884	{
678	/*	885	if (!cctx)
679	* this is a _very_ stripped down perl interpreter ;)	886	return;
680	*/
681	Coro__State ctx = (Coro__State)arg;
682	JMPENV coro_start_env;
683		887
684	PL_top_env = &ctx->start_env;	888	--cctx_count;
685		889
686	ctx->cursp = 0;	890	#if CORO_USE_VALGRIND
687	PL_op = PL_op->op_next;	891	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
688	CALLRUNOPS(aTHX);	892	#endif
689		893
690	abort ();	894	#if HAVE_MMAP
691	}	895	if (cctx->flags & CC_MAPPED)
		896	munmap (cctx->sptr, cctx->ssize);
		897	else
		898	#endif
		899	Safefree (cctx->sptr);
692		900
693	STATIC void	901	Safefree (cctx);
		902	}
		903
		904	static coro_cctx *
		905	cctx_get (pTHX)
		906	{
		907	while (cctx_first)
		908	{
		909	coro_cctx *cctx = cctx_first;
		910	cctx_first = cctx->next;
		911	--cctx_idle;
		912
		913	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		914	return cctx;
		915
		916	cctx_destroy (cctx);
		917	}
		918
		919	return cctx_new ();
		920	}
		921
		922	static void
		923	cctx_put (coro_cctx *cctx)
		924	{
		925	/* free another cctx if overlimit */
		926	if (cctx_idle >= MAX_IDLE_CCTX)
		927	{
		928	coro_cctx *first = cctx_first;
		929	cctx_first = first->next;
		930	--cctx_idle;
		931
		932	cctx_destroy (first);
		933	}
		934
		935	++cctx_idle;
		936	cctx->next = cctx_first;
		937	cctx_first = cctx;
		938	}
		939
		940	/ coroutine switching ***************************************************/
		941
		942	static void NOINLINE
		943	transfer_check (pTHX_ struct coro prev, struct coro next)
		944	{
		945	if (prev != next)
		946	{
		947	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		948	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		949
		950	if (next->flags & CF_RUNNING)
		951	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		952
		953	if (next->flags & CF_DESTROYED)
		954	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		955
		956	if (PL_lex_state != LEX_NOTPARSING)
		957	croak ("Coro::State::transfer called while parsing, but this is not supported");
		958	}
		959	}
		960
		961	/* always use the TRANSFER macro */
		962	static void NOINLINE
694	transfer(pTHX_ struct coro prev, struct coro next, int flags)	963	transfer (pTHX_ struct coro prev, struct coro next)
695	{	964	{
696	dSTACKLEVEL;	965	dSTACKLEVEL;
697	static struct coro *xnext;
698		966
		967	/* sometimes transfer is only called to set idle_sp */
		968	if (!next)
		969	{
		970	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		971	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		972	}
699	if (prev != next)	973	else if (prev != next)
700	{	974	{
701	xnext = next;	975	coro_cctx *prev__cctx;
702		976
703	if (next->mainstack)	977	if (prev->flags & CF_NEW)
704	{	978	{
705	SAVE (prev, flags);	979	/* create a new empty context */
706	LOAD (next);	980	Newz (0, prev->cctx, 1, coro_cctx);
707		981	prev->flags &= ~CF_NEW;
708	/* mark this state as in-use */	982	prev->flags \|= CF_RUNNING;
709	next->mainstack = 0;
710	next->tmps_ix = -2;
711
712	/* stacklevel changed? if yes, grab the stack for us! */
713	if (flags & TRANSFER_SAVE_CCTXT)
714	{
715	if (!prev->stack)
716	allocate_stack (prev, 0);
717	else if (prev->cursp != stacklevel
718	&& prev->stack->usecnt > 1)
719	{
720	prev->gencnt = ++prev->stack->gencnt;
721	prev->stack->usecnt = 1;
722	}
723
724	/* has our stack been invalidated? */
725	if (next->stack && next->stack->gencnt != next->gencnt)
726	{
727	deallocate_stack (next);
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	continue_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	}
733
734	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
735	/* don't add any code here */
736	}
737
738	}	983	}
739	else if (next->tmps_ix == -2)	984
740	croak ("tried to transfer to running coroutine");	985	prev->flags &= ~CF_RUNNING;
		986	next->flags \|= CF_RUNNING;
		987
		988	LOCK;
		989
		990	if (next->flags & CF_NEW)
		991	{
		992	/* need to start coroutine */
		993	next->flags &= ~CF_NEW;
		994	/* first get rid of the old state */
		995	save_perl (aTHX_ prev);
		996	/* setup coroutine call */
		997	setup_coro (aTHX_ next);
		998	}
741	else	999	else
742	{	1000	{
743	SAVE (prev, -1); /* first get rid of the old state */	1001	/* coroutine already started */
744		1002	save_perl (aTHX_ prev);
745	if (flags & TRANSFER_SAVE_CCTXT)	1003	load_perl (aTHX_ next);
746	{
747	if (!prev->stack)
748	allocate_stack (prev, 0);
749
750	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
751	{
752	PL_top_env = &next->start_env;
753
754	setup_coro (next);
755
756	prev->stack->refcnt++;
757	prev->stack->usecnt++;
758	next->stack = prev->stack;
759	next->gencnt = prev->gencnt;
760	}
761	else
762	{
763	assert (!next->stack);
764	allocate_stack (next, 1);
765	coro_create (&(next->stack->cctx),
766	setup_coro, (void *)next,
767	next->stack->sptr, labs (next->stack->ssize));
768	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
769	/* don't add any code here */
770	}
771	}
772	else
773	setup_coro (next);
774	}	1004	}
775		1005
776	/*	1006	prev__cctx = prev->cctx;
777	* xnext is now either prev or next, depending on wether	1007
778	* we switched the c stack or not. that's why I use a global	1008	/* possibly "free" the cctx */
779	* variable, that should become thread-specific at one point.	1009	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
780	*/	1010	{
781	xnext->cursp = stacklevel;	1011	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
782	}	1012	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
783		1013
784	if (coro_mortal)	1014	prev->cctx = 0;
		1015
		1016	cctx_put (prev__cctx);
		1017	}
		1018
		1019	if (!next->cctx)
		1020	next->cctx = cctx_get (aTHX);
		1021
		1022	if (prev__cctx != next->cctx)
		1023	{
		1024	prev__cctx->top_env = PL_top_env;
		1025	PL_top_env = next->cctx->top_env;
		1026	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1027	}
		1028
		1029	free_coro_mortal (aTHX);
		1030	UNLOCK;
785	{	1031	}
786	SvREFCNT_dec (coro_mortal);	1032	}
787	coro_mortal = 0;	1033
		1034	struct transfer_args
		1035	{
		1036	struct coro prev, next;
		1037	};
		1038
		1039	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1040	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1041
		1042	/ high level stuff ******************************************************/
		1043
		1044	static int
		1045	coro_state_destroy (pTHX_ struct coro *coro)
		1046	{
		1047	if (coro->flags & CF_DESTROYED)
		1048	return 0;
		1049
		1050	coro->flags \|= CF_DESTROYED;
		1051
		1052	if (coro->flags & CF_READY)
788	}	1053	{
789	}	1054	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1055	/* alternative: look through all ready queues and remove the coro */
		1056	LOCK;
		1057	--coro_nready;
		1058	UNLOCK;
		1059	}
		1060	else
		1061	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
790		1062
791	#define SV_CORO(sv,func) \	1063	if (coro->mainstack && coro->mainstack != main_mainstack)
792	do { \	1064	{
793	if (SvROK (sv)) \	1065	struct coro temp;
794	sv = SvRV (sv); \
795	\
796	if (SvTYPE(sv) == SVt_PVHV) \
797	{ \
798	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
799	\
800	if (!he) \
801	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
802	\
803	(sv) = SvRV (HeVAL(he)); \
804	} \
805	\
806	/* must also be changed inside Coro::Cont::yield */ \
807	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
808	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
809	\
810	} while(0)
811		1066
812	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1067	assert (!(coro->flags & CF_RUNNING));
		1068
		1069	Zero (&temp, 1, struct coro);
		1070	temp.save = CORO_SAVE_ALL;
		1071
		1072	if (coro->flags & CF_RUNNING)
		1073	croak ("FATAL: tried to destroy currently running coroutine");
		1074
		1075	save_perl (aTHX_ &temp);
		1076	load_perl (aTHX_ coro);
		1077
		1078	coro_destroy_stacks (aTHX);
		1079
		1080	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1081
		1082	coro->mainstack = 0;
		1083	}
		1084
		1085	cctx_destroy (coro->cctx);
		1086	SvREFCNT_dec (coro->args);
		1087
		1088	if (coro->next) coro->next->prev = coro->prev;
		1089	if (coro->prev) coro->prev->next = coro->next;
		1090	if (coro == coro_first) coro_first = coro->next;
		1091
		1092	return 1;
		1093	}
		1094
		1095	static int
		1096	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1097	{
		1098	struct coro coro = (struct coro )mg->mg_ptr;
		1099	mg->mg_ptr = 0;
		1100
		1101	coro->hv = 0;
		1102
		1103	if (--coro->refcnt < 0)
		1104	{
		1105	coro_state_destroy (aTHX_ coro);
		1106	Safefree (coro);
		1107	}
		1108
		1109	return 0;
		1110	}
		1111
		1112	static int
		1113	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1114	{
		1115	struct coro coro = (struct coro )mg->mg_ptr;
		1116
		1117	++coro->refcnt;
		1118
		1119	return 0;
		1120	}
		1121
		1122	static MGVTBL coro_state_vtbl = {
		1123	0, 0, 0, 0,
		1124	coro_state_free,
		1125	0,
		1126	#ifdef MGf_DUP
		1127	coro_state_dup,
		1128	#else
		1129	# define MGf_DUP 0
		1130	#endif
		1131	};
813		1132
814	static void	1133	static void
		1134	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1135	{
		1136	ta->prev = SvSTATE (prev_sv);
		1137	ta->next = SvSTATE (next_sv);
		1138	TRANSFER_CHECK (*ta);
		1139	}
		1140
		1141	static void
815	api_transfer(pTHX_ SV prev, SV next, int flags)	1142	api_transfer (SV prev_sv, SV next_sv)
816	{	1143	{
817	SV_CORO (prev, "Coro::transfer");	1144	dTHX;
818	SV_CORO (next, "Coro::transfer");	1145	struct transfer_args ta;
819		1146
820	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1147	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1148	TRANSFER (ta);
		1149	}
		1150
		1151	static int
		1152	api_save (SV *coro_sv, int new_save)
		1153	{
		1154	dTHX;
		1155	struct coro *coro = SvSTATE (coro_sv);
		1156	int old_save = coro->save;
		1157
		1158	if (new_save >= 0)
		1159	coro->save = new_save;
		1160
		1161	return old_save;
821	}	1162	}
822		1163
823	/ Coro ******************************************************************/	1164	/ Coro ******************************************************************/
824		1165
825	#define PRIO_MAX 3
826	#define PRIO_HIGH 1
827	#define PRIO_NORMAL 0
828	#define PRIO_LOW -1
829	#define PRIO_IDLE -3
830	#define PRIO_MIN -4
831
832	/* for Coro.pm */
833	static GV coro_current, coro_idle;
834	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
835	static int coro_nready;
836
837	static void	1166	static void
838	coro_enq (SV *sv)	1167	coro_enq (pTHX_ SV *coro_sv)
839	{	1168	{
840	if (SvTYPE (sv) == SVt_PVHV)
841	{
842	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
843	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
844
845	prio = prio > PRIO_MAX ? PRIO_MAX
846	: prio < PRIO_MIN ? PRIO_MIN
847	: prio;
848
849	av_push (coro_ready [prio - PRIO_MIN], sv);	1169	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
850	coro_nready++;
851
852	return;
853	}
854
855	croak ("Coro::ready tried to enqueue something that is not a coroutine");
856	}	1170	}
857		1171
858	static SV *	1172	static SV *
859	coro_deq (int min_prio)	1173	coro_deq (pTHX_ int min_prio)
860	{	1174	{
861	int prio = PRIO_MAX - PRIO_MIN;	1175	int prio = PRIO_MAX - PRIO_MIN;
862		1176
863	min_prio -= PRIO_MIN;	1177	min_prio -= PRIO_MIN;
864	if (min_prio < 0)	1178	if (min_prio < 0)
865	min_prio = 0;	1179	min_prio = 0;
866		1180
867	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1181	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
868	if (av_len (coro_ready[prio]) >= 0)	1182	if (AvFILLp (coro_ready [prio]) >= 0)
869	{
870	coro_nready--;
871	return av_shift (coro_ready[prio]);	1183	return av_shift (coro_ready [prio]);
872	}
873		1184
874	return 0;	1185	return 0;
875	}	1186	}
876		1187
		1188	static int
		1189	api_ready (SV *coro_sv)
		1190	{
		1191	dTHX;
		1192	struct coro *coro;
		1193
		1194	if (SvROK (coro_sv))
		1195	coro_sv = SvRV (coro_sv);
		1196
		1197	coro = SvSTATE (coro_sv);
		1198
		1199	if (coro->flags & CF_READY)
		1200	return 0;
		1201
		1202	coro->flags \|= CF_READY;
		1203
		1204	LOCK;
		1205	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1206	++coro_nready;
		1207	UNLOCK;
		1208
		1209	return 1;
		1210	}
		1211
		1212	static int
		1213	api_is_ready (SV *coro_sv)
		1214	{
		1215	dTHX;
		1216	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1217	}
		1218
877	static void	1219	static void
878	api_ready (SV *coro)	1220	prepare_schedule (pTHX_ struct transfer_args *ta)
879	{	1221	{
880	if (SvROK (coro))	1222	SV prev_sv, next_sv;
881	coro = SvRV (coro);
882		1223
883	coro_enq (SvREFCNT_inc (coro));	1224	for (;;)
		1225	{
		1226	LOCK;
		1227	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1228
		1229	/* nothing to schedule: call the idle handler */
		1230	if (!next_sv)
		1231	{
		1232	dSP;
		1233	UNLOCK;
		1234
		1235	ENTER;
		1236	SAVETMPS;
		1237
		1238	PUSHMARK (SP);
		1239	PUTBACK;
		1240	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1241
		1242	FREETMPS;
		1243	LEAVE;
		1244	continue;
		1245	}
		1246
		1247	ta->next = SvSTATE (next_sv);
		1248
		1249	/* cannot transfer to destroyed coros, skip and look for next */
		1250	if (ta->next->flags & CF_DESTROYED)
		1251	{
		1252	UNLOCK;
		1253	SvREFCNT_dec (next_sv);
		1254	/* coro_nready is already taken care of by destroy */
		1255	continue;
		1256	}
		1257
		1258	--coro_nready;
		1259	UNLOCK;
		1260	break;
		1261	}
		1262
		1263	/* free this only after the transfer */
		1264	prev_sv = SvRV (coro_current);
		1265	ta->prev = SvSTATE (prev_sv);
		1266	TRANSFER_CHECK (*ta);
		1267	assert (ta->next->flags & CF_READY);
		1268	ta->next->flags &= ~CF_READY;
		1269	SvRV_set (coro_current, next_sv);
		1270
		1271	LOCK;
		1272	free_coro_mortal (aTHX);
		1273	coro_mortal = prev_sv;
		1274	UNLOCK;
		1275	}
		1276
		1277	static void
		1278	prepare_cede (pTHX_ struct transfer_args *ta)
		1279	{
		1280	api_ready (coro_current);
		1281	prepare_schedule (aTHX_ ta);
		1282	}
		1283
		1284	static int
		1285	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1286	{
		1287	if (coro_nready)
		1288	{
		1289	SV *prev = SvRV (coro_current);
		1290	prepare_schedule (aTHX_ ta);
		1291	api_ready (prev);
		1292	return 1;
		1293	}
		1294	else
		1295	return 0;
884	}	1296	}
885		1297
886	static void	1298	static void
887	api_schedule (void)	1299	api_schedule (void)
888	{	1300	{
889	SV prev, next;	1301	dTHX;
		1302	struct transfer_args ta;
890		1303
891	prev = SvRV (GvSV (coro_current));	1304	prepare_schedule (aTHX_ &ta);
892	next = coro_deq (PRIO_MIN);	1305	TRANSFER (ta);
893
894	if (!next)
895	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
896
897	/* free this only after the transfer */
898	coro_mortal = prev;
899	SV_CORO (prev, "Coro::schedule");
900
901	SvRV (GvSV (coro_current)) = next;
902
903	SV_CORO (next, "Coro::schedule");
904
905	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
906	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
907	}	1306	}
908		1307
909	static void	1308	static int
910	api_cede (void)	1309	api_cede (void)
911	{	1310	{
912	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1311	dTHX;
		1312	struct transfer_args ta;
913		1313
914	api_schedule ();	1314	prepare_cede (aTHX_ &ta);
		1315
		1316	if (ta.prev != ta.next)
		1317	{
		1318	TRANSFER (ta);
		1319	return 1;
		1320	}
		1321	else
		1322	return 0;
		1323	}
		1324
		1325	static int
		1326	api_cede_notself (void)
		1327	{
		1328	dTHX;
		1329	struct transfer_args ta;
		1330
		1331	if (prepare_cede_notself (aTHX_ &ta))
		1332	{
		1333	TRANSFER (ta);
		1334	return 1;
		1335	}
		1336	else
		1337	return 0;
915	}	1338	}
916		1339
917	MODULE = Coro::State PACKAGE = Coro::State	1340	MODULE = Coro::State PACKAGE = Coro::State
918		1341
919	PROTOTYPES: ENABLE	1342	PROTOTYPES: DISABLE
920		1343
921	BOOT:	1344	BOOT:
922	{ /* {} necessary for stoopid perl-5.6.x */	1345	{
923	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1346	#ifdef USE_ITHREADS
924	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1347	MUTEX_INIT (&coro_mutex);
		1348	#endif
		1349	BOOT_PAGESIZE;
		1350
925	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1351	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
926		1352
		1353	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1354	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1355	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1356	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1357
927	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1358	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
928	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1359	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
929	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1360	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1361	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1362	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
930	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1363	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
931		1364	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
932	if (!padlist_cache)
933	padlist_cache = newHV ();
934		1365
935	main_mainstack = PL_mainstack;	1366	main_mainstack = PL_mainstack;
		1367	main_top_env = PL_top_env;
		1368
		1369	while (main_top_env->je_prev)
		1370	main_top_env = main_top_env->je_prev;
936		1371
937	coroapi.ver = CORO_API_VERSION;	1372	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1373	coroapi.transfer = api_transfer;
939	}
940		1374
941	Coro::State	1375	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1376	}
943	SV * args	1377
944	PROTOTYPE: $	1378	SV *
		1379	new (char *klass, ...)
945	CODE:	1380	CODE:
946	Coro__State coro;	1381	{
		1382	struct coro *coro;
		1383	HV *hv;
		1384	int i;
947		1385
948	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1386	Newz (0, coro, 1, struct coro);
		1387	coro->args = newAV ();
		1388	coro->save = CORO_SAVE_DEF;
		1389	coro->flags = CF_NEW;
952		1390
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1391	if (coro_first) coro_first->prev = coro;
954	coro->mainstack = 0; /* actual work is done inside transfer */	1392	coro->next = coro_first;
955	coro->stack = 0;	1393	coro_first = coro;
956		1394
957	/* same as JMPENV_BOOTSTRAP */	1395	coro->hv = hv = newHV ();
958	/* we might be able to recycle start_env, but safe is safe */	1396	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
959	//Zero(&coro->start_env, 1, JMPENV);	1397	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962		1398
963	RETVAL = coro;	1399	for (i = 1; i < items; i++)
		1400	av_push (coro->args, newSVsv (ST (i)));
		1401	}
964	OUTPUT:	1402	OUTPUT:
965	RETVAL	1403	RETVAL
966		1404
		1405	int
		1406	save (SV *coro, int new_save = -1)
		1407	CODE:
		1408	RETVAL = api_save (coro, new_save);
		1409	OUTPUT:
		1410	RETVAL
		1411
		1412	int
		1413	save_also (SV *coro_sv, int save_also)
		1414	CODE:
		1415	{
		1416	struct coro *coro = SvSTATE (coro_sv);
		1417	RETVAL = coro->save;
		1418	coro->save \|= save_also;
		1419	}
		1420	OUTPUT:
		1421	RETVAL
		1422
967	void	1423	void
968	transfer(prev, next, flags)	1424	_set_stacklevel (...)
969	SV *prev	1425	ALIAS:
970	SV *next	1426	Coro::State::transfer = 1
971	int flags	1427	Coro::schedule = 2
972	PROTOTYPE: @	1428	Coro::cede = 3
		1429	Coro::cede_notself = 4
973	CODE:	1430	CODE:
974	PUTBACK;	1431	{
975	SV_CORO (next, "Coro::transfer");	1432	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1433
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1434	switch (ix)
978	SPAGAIN;	1435	{
		1436	case 0:
		1437	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1438	ta.next = 0;
		1439	break;
		1440
		1441	case 1:
		1442	if (items != 2)
		1443	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1444
		1445	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1446	break;
		1447
		1448	case 2:
		1449	prepare_schedule (aTHX_ &ta);
		1450	break;
		1451
		1452	case 3:
		1453	prepare_cede (aTHX_ &ta);
		1454	break;
		1455
		1456	case 4:
		1457	if (!prepare_cede_notself (aTHX_ &ta))
		1458	XSRETURN_EMPTY;
		1459
		1460	break;
		1461	}
		1462
		1463	BARRIER;
		1464	TRANSFER (ta);
		1465
		1466	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1467	XSRETURN_YES;
		1468	}
		1469
		1470	bool
		1471	_destroy (SV *coro_sv)
		1472	CODE:
		1473	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1474	OUTPUT:
		1475	RETVAL
979		1476
980	void	1477	void
981	DESTROY(coro)
982	Coro::State coro
983	CODE:
984
985	if (coro->mainstack && coro->mainstack != main_mainstack)
986	{
987	struct coro temp;
988
989	PUTBACK;
990	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
991	LOAD(aTHX_ coro);
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005
1006	void
1007	_exit(code)	1478	_exit (code)
1008	int code	1479	int code
1009	PROTOTYPE: $	1480	PROTOTYPE: $
1010	CODE:	1481	CODE:
1011	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
1012	_exit (code);	1482	_exit (code);
1013	#else
1014	signal (SIGTERM, SIG_DFL);
1015	raise (SIGTERM);
1016	exit (code);
1017	#endif
1018		1483
1019	MODULE = Coro::State PACKAGE = Coro::Cont	1484	int
		1485	cctx_stacksize (int new_stacksize = 0)
		1486	CODE:
		1487	RETVAL = coro_stacksize;
		1488	if (new_stacksize)
		1489	coro_stacksize = new_stacksize;
		1490	OUTPUT:
		1491	RETVAL
1020		1492
1021	# this is slightly dirty (should expose a c-level api)	1493	int
		1494	cctx_count ()
		1495	CODE:
		1496	RETVAL = cctx_count;
		1497	OUTPUT:
		1498	RETVAL
		1499
		1500	int
		1501	cctx_idle ()
		1502	CODE:
		1503	RETVAL = cctx_idle;
		1504	OUTPUT:
		1505	RETVAL
1022		1506
1023	void	1507	void
1024	yield(...)	1508	list ()
1025	PROTOTYPE: @	1509	PPCODE:
		1510	{
		1511	struct coro *coro;
		1512	for (coro = coro_first; coro; coro = coro->next)
		1513	if (coro->hv)
		1514	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1515	}
		1516
		1517	void
		1518	call (Coro::State coro, SV *coderef)
		1519	ALIAS:
		1520	eval = 1
		1521	CODE:
		1522	{
		1523	if (coro->mainstack)
		1524	{
		1525	struct coro temp;
		1526	Zero (&temp, 1, struct coro);
		1527	temp.save = CORO_SAVE_ALL;
		1528
		1529	if (!(coro->flags & CF_RUNNING))
		1530	{
		1531	save_perl (aTHX_ &temp);
		1532	load_perl (aTHX_ coro);
		1533	}
		1534
		1535	{
		1536	dSP;
		1537	ENTER;
		1538	SAVETMPS;
		1539	PUSHMARK (SP);
		1540	PUTBACK;
		1541	if (ix)
		1542	eval_sv (coderef, 0);
		1543	else
		1544	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1545	SPAGAIN;
		1546	FREETMPS;
		1547	LEAVE;
		1548	PUTBACK;
		1549	}
		1550
		1551	if (!(coro->flags & CF_RUNNING))
		1552	{
		1553	save_perl (aTHX_ coro);
		1554	load_perl (aTHX_ &temp);
		1555	}
		1556	}
		1557	}
		1558
		1559	SV *
		1560	is_ready (Coro::State coro)
		1561	PROTOTYPE: $
		1562	ALIAS:
		1563	is_ready = CF_READY
		1564	is_running = CF_RUNNING
		1565	is_new = CF_NEW
		1566	is_destroyed = CF_DESTROYED
		1567	CODE:
		1568	RETVAL = boolSV (coro->flags & ix);
		1569	OUTPUT:
		1570	RETVAL
		1571
		1572	void
		1573	trace (Coro::State coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1574	CODE:
		1575	if (flags & CC_TRACE)
		1576	{
		1577	if (!coro->cctx)
		1578	coro->cctx = cctx_new ();
		1579	else if (!(coro->cctx->flags & CC_TRACE))
		1580	croak ("cannot enable tracing on coroutine with custom stack");
		1581
		1582	coro->cctx->flags \|= flags & (CC_TRACE \| CC_TRACE_ALL);
		1583	}
		1584	else
		1585	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1586	{
		1587	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1588	coro->cctx->flags \|= CC_NOREUSE;
		1589
		1590	if (coro->flags & CF_RUNNING)
		1591	PL_runops = RUNOPS_DEFAULT;
		1592	else
		1593	coro->runops = RUNOPS_DEFAULT;
		1594	}
		1595
		1596	SV *
		1597	has_stack (Coro::State coro)
		1598	PROTOTYPE: $
		1599	CODE:
		1600	RETVAL = boolSV (!!coro->cctx);
		1601	OUTPUT:
		1602	RETVAL
		1603
		1604	int
		1605	is_traced (Coro::State coro)
		1606	PROTOTYPE: $
		1607	CODE:
		1608	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1609	OUTPUT:
		1610	RETVAL
		1611
		1612	IV
		1613	rss (Coro::State coro)
		1614	PROTOTYPE: $
1026	CODE:	1615	CODE:
1027	static SV *returnstk;	1616	RETVAL = coro_rss (aTHX_ coro);
1028	SV *sv;	1617	OUTPUT:
1029	AV *defav = GvAV (PL_defgv);	1618	RETVAL
1030	struct coro prev, next;
1031		1619
1032	if (!returnstk)
1033	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1034
1035	/* set up @_ -- ugly */
1036	av_clear (defav);
1037	av_fill (defav, items - 1);
1038	while (items--)
1039	av_store (defav, items, SvREFCNT_inc (ST(items)));
1040
1041	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1042	sv = av_pop ((AV *)SvRV (returnstk));
1043	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1044	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1045	SvREFCNT_dec (sv);
1046
1047	transfer(aTHX_ prev, next, 0);
1048		1620
1049	MODULE = Coro::State PACKAGE = Coro	1621	MODULE = Coro::State PACKAGE = Coro
1050		1622
1051	# this is slightly dirty (should expose a c-level api)
1052
1053	BOOT:	1623	BOOT:
1054	{	1624	{
1055	int i;	1625	int i;
		1626
		1627	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1628	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1629	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1630
		1631	coro_current = get_sv ("Coro::current", FALSE);
		1632	SvREADONLY_on (coro_current);
		1633
1056	HV *stash = gv_stashpv ("Coro", TRUE);	1634	coro_stash = gv_stashpv ("Coro", TRUE);
1057		1635
1058	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1636	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1059	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1637	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1060	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1638	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1061	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1639	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1062	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1640	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1063	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1641	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1064
1065	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1066	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1067		1642
1068	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1643	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1069	coro_ready[i] = newAV ();	1644	coro_ready[i] = newAV ();
1070		1645
1071	{	1646	{
1072	SV *sv = perl_get_sv("Coro::API", 1);	1647	SV *sv = perl_get_sv("Coro::API", 1);
1073		1648
1074	coroapi.schedule = api_schedule;	1649	coroapi.schedule = api_schedule;
		1650	coroapi.save = api_save;
1075	coroapi.cede = api_cede;	1651	coroapi.cede = api_cede;
		1652	coroapi.cede_notself = api_cede_notself;
1076	coroapi.ready = api_ready;	1653	coroapi.ready = api_ready;
		1654	coroapi.is_ready = api_is_ready;
1077	coroapi.nready = &coro_nready;	1655	coroapi.nready = &coro_nready;
1078	coroapi.current = coro_current;	1656	coroapi.current = coro_current;
1079		1657
1080	GCoroAPI = &coroapi;	1658	GCoroAPI = &coroapi;
1081	sv_setiv(sv, (IV)&coroapi);	1659	sv_setiv (sv, (IV)&coroapi);
1082	SvREADONLY_on(sv);	1660	SvREADONLY_on (sv);
1083	}	1661	}
1084	}	1662	}
1085		1663
1086	#if !PERL_MICRO
1087
1088	void	1664	void
1089	ready(self)	1665	_set_current (SV *current)
1090	SV * self
1091	PROTOTYPE: $	1666	PROTOTYPE: $
1092	CODE:	1667	CODE:
1093	api_ready (self);	1668	SvREFCNT_dec (SvRV (coro_current));
1094		1669	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1095	#endif
1096		1670
1097	int	1671	int
		1672	prio (Coro::State coro, int newprio = 0)
		1673	ALIAS:
		1674	nice = 1
		1675	CODE:
		1676	{
		1677	RETVAL = coro->prio;
		1678
		1679	if (items > 1)
		1680	{
		1681	if (ix)
		1682	newprio = coro->prio - newprio;
		1683
		1684	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1685	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1686
		1687	coro->prio = newprio;
		1688	}
		1689	}
		1690	OUTPUT:
		1691	RETVAL
		1692
		1693	SV *
		1694	ready (SV *self)
		1695	PROTOTYPE: $
		1696	CODE:
		1697	RETVAL = boolSV (api_ready (self));
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	int
1098	nready(...)	1702	nready (...)
1099	PROTOTYPE:	1703	PROTOTYPE:
1100	CODE:	1704	CODE:
1101	RETVAL = coro_nready;	1705	RETVAL = coro_nready;
1102	OUTPUT:	1706	OUTPUT:
1103	RETVAL	1707	RETVAL
1104		1708
		1709	# for async_pool speedup
1105	void	1710	void
1106	schedule(...)	1711	_pool_1 (SV *cb)
1107	PROTOTYPE:
1108	CODE:	1712	CODE:
1109	api_schedule ();	1713	{
		1714	int i, len;
		1715	HV hv = (HV )SvRV (coro_current);
		1716	AV *defav = GvAV (PL_defgv);
		1717	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1718	AV *invoke_av;
		1719
		1720	if (!invoke)
		1721	croak ("\3terminate\2\n");
		1722
		1723	hv_store (hv, "desc", sizeof ("desc") - 1,
		1724	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1725
		1726	invoke_av = (AV *)SvRV (invoke);
		1727	len = av_len (invoke_av);
		1728
		1729	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1730
		1731	if (len > 0)
		1732	{
		1733	av_fill (defav, len - 1);
		1734	for (i = 0; i < len; ++i)
		1735	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1736	}
		1737
		1738	SvREFCNT_dec (invoke);
		1739	}
1110		1740
1111	void	1741	void
1112	cede(...)	1742	_pool_2 (SV *cb)
1113	PROTOTYPE:
1114	CODE:	1743	CODE:
1115	api_cede ();	1744	{
		1745	struct coro *coro = SvSTATE (coro_current);
1116		1746
		1747	sv_setsv (cb, &PL_sv_undef);
		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	coro->save = CORO_SAVE_DEF;
		1757	coro->prio = 0;
		1758	av_push (av_async_pool, newSVsv (coro_current));
		1759	}
		1760
		1761
		1762	MODULE = Coro::State PACKAGE = Coro::AIO
		1763
		1764	SV *
		1765	_get_state ()
		1766	CODE:
		1767	{
		1768	struct io_state *data;
		1769
		1770	RETVAL = newSV (sizeof (struct io_state));
		1771	data = (struct io_state *)SvPVX (RETVAL);
		1772	SvCUR_set (RETVAL, sizeof (struct io_state));
		1773	SvPOK_only (RETVAL);
		1774
		1775	data->errorno = errno;
		1776	data->laststype = PL_laststype;
		1777	data->laststatval = PL_laststatval;
		1778	data->statcache = PL_statcache;
		1779	}
		1780	OUTPUT:
		1781	RETVAL
		1782
		1783	void
		1784	_set_state (char *data_)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	{
		1788	struct io_state data = (void )data_;
		1789
		1790	errno = data->errorno;
		1791	PL_laststype = data->laststype;
		1792	PL_laststatval = data->laststatval;
		1793	PL_statcache = data->statcache;
		1794	}
		1795

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Comparing Coro/Coro/State.xs (file contents): Revision 1.51 by pcg, Sun Nov 30 17:03:48 2003 UTC vs. Revision 1.171 by root, Sat Sep 29 19:42:10 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.51 by pcg, Sun Nov 30 17:03:48 2003 UTC vs.
Revision 1.171 by root, Sat Sep 29 19:42:10 2007 UTC