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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.17 by root, Wed Jul 25 14:01:46 2001 UTC vs.
Revision 1.178 by root, Wed Oct 3 01:48:06 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "libcoro/coro.c"	9	#include "patchlevel.h"
		10
		11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
6		14
7	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
8	# include <unistd.h>	16	# include <unistd.h>
9	# include <sys/mman.h>	17	# include <sys/mman.h>
10	# ifndef MAP_ANON
11	# ifdef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
12	# define MAP_ANON MAP_ANONYMOUS	19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
13	# else	21	# else
14	# undef HAVE_MMAP	22	# undef HAVE_MMAP
15	# endif	23	# endif
16	# endif	24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
17	#endif	32	# endif
18
19	#define MAY_FLUSH /* increases codesize */
20
21	/* perl-related */
22	#define TRANSFER_SAVE_DEFAV 0x00000001
23	#define TRANSFER_SAVE_DEFSV 0x00000002
24	#define TRANSFER_SAVE_ERRSV 0x00000004
25	/* c-related */
26	#define TRANSFER_SAVE_CCTXT 0x00000008
27	#ifdef CORO_LAZY_STACK
28	# define TRANSFER_LAZY_STACK 0x00000010
29	#else	33	#else
30	# define TRANSFER_LAZY_STACK 0x00000000	34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
31	#endif	57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
32		74
33	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV\|TRANSFER_SAVE_DEFSV \	75	/* 5.8.7 */
34	\|TRANSFER_SAVE_ERRSV\|TRANSFER_SAVE_CCTXT)	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
35		79
36	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
37	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
38		83
39	/* The next macro should delcare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
40	* to the current C stack pointer. It's property is that it changes with each call	85	# define CORO_STACKGUARD 0
41	* and should be unique. */	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
		95	#define dSTACKLEVEL volatile char stacklevel
42	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
43		97
44	#define labs(l) ((l) >= 0 ? (l) : -(l))	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
45		99
46	/* this is actually not only the c stack but also c registers etc... */	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
		109
		110	#include "CoroAPI.h"
		111
		112	#ifdef USE_ITHREADS
		113	static perl_mutex coro_mutex;
		114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		116	#else
		117	# define LOCK (void)0
		118	# define UNLOCK (void)0
		119	#endif
		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
		131	static struct CoroAPI coroapi;
		132	static AV main_mainstack; / used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
		134	static HV coro_state_stash, coro_stash;
		135	static SV coro_mortal; / will be freed after next transfer */
		136
		137	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 */
47	typedef struct {	157	typedef struct coro_cctx {
48	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
49	int usecnt; /* shared by how many coroutines */
50	int gencnt; /* generation counter */
51		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;
52	coro_context cctx;	168	coro_context cctx;
53		169
54	void *sptr;	170	#if CORO_USE_VALGRIND
55	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
56	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
57		175
58	static coro_stack main_stack = { 1, 0, 0 };	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	};
59		182
		183	/* this is a structure representing a perl-level coroutine */
60	struct coro {	184	struct coro {
61	/* the optional C context */	185	/* the c coroutine allocated to this perl coroutine, if any */
62	coro_stack *stack;	186	coro_cctx *cctx;
63	void *cursp;
64	int gencnt;
65
66	/* optionally saved, might be zero */
67	AV *defav;
68	SV *defsv;
69	SV *errsv;
70
71	/* saved global state not related to stacks */
72	U8 dowarn;
73
74	/* the stacks and related info (callchain etc..) */
75	PERL_SI *curstackinfo;
76	AV *curstack;
77	AV *mainstack;
78	SV **stack_sp;
79	OP *op;
80	SV **curpad;
81	SV **stack_base;
82	SV **stack_max;
83	SV **tmps_stack;
84	I32 tmps_floor;
85	I32 tmps_ix;
86	I32 tmps_max;
87	I32 *markstack;
88	I32 *markstack_ptr;
89	I32 *markstack_max;
90	I32 *scopestack;
91	I32 scopestack_ix;
92	I32 scopestack_max;
93	ANY *savestack;
94	I32 savestack_ix;
95	I32 savestack_max;
96	OP **retstack;
97	I32 retstack_ix;
98	I32 retstack_max;
99	COP *curcop;
100	JMPENV start_env;
101	JMPENV *top_env;
102		187
103	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
104	AV *args;	189	AV *args;
		190	int refcnt;
		191	int flags; /* CF_ flags */
		192
		193	/* optionally saved, might be zero */
		194	AV defav; / @_ */
		195	SV defsv; / $_ */
		196	SV errsv; / $@ */
		197	IO 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 switches to this coro */
		207
		208	/* coro process data */
		209	int prio;
		210
		211	/* linked list */
		212	struct coro next, prev;
		213	HV hv; / the perl hash associated with this coro, if any */
105	};	214	};
106		215
107	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
109		218
110	static AV main_mainstack; / used to differentiate between $main and others */	219	/ Coro ******************************************************************/
111	static HV *coro_state_stash;
112	static SV *ucoro_state_sv;
113	static U32 ucoro_state_hash;
114	static HV *padlist_cache;
115		220
116	/* mostly copied from op.c:cv_clone2 */	221	#define PRIO_MAX 3
117	STATIC AV *	222	#define PRIO_HIGH 1
118	clone_padlist (AV *protopadlist)	223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/ lowlevel stuff ********************************************************/
		235
		236	static AV *
		237	coro_clone_padlist (pTHX_ CV *cv)
119	{	238	{
120	AV *av;	239	AV *padlist = CvPADLIST (cv);
121	I32 ix;
122	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
123	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
124	SV **pname = AvARRAY (protopad_name);
125	SV **ppad = AvARRAY (protopad);
126	I32 fname = AvFILLp (protopad_name);
127	I32 fpad = AvFILLp (protopad);
128	AV newpadlist, newpad_name, *newpad;	240	AV newpadlist, newpad;
129	SV **npad;
130
131	newpad_name = newAV ();
132	for (ix = fname; ix >= 0; ix--)
133	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
134
135	newpad = newAV ();
136	av_fill (newpad, AvFILLp (protopad));
137	npad = AvARRAY (newpad);
138		241
139	newpadlist = newAV ();	242	newpadlist = newAV ();
140	AvREAL_off (newpadlist);	243	AvREAL_off (newpadlist);
141	av_store (newpadlist, 0, (SV *) newpad_name);	244	#if PERL_VERSION_ATLEAST (5,9,0)
		245	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		246	#else
		247	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		248	#endif
		249	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		250	--AvFILLp (padlist);
		251
		252	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
142	av_store (newpadlist, 1, (SV *) newpad);	253	av_store (newpadlist, 1, (SV *)newpad);
143		254
144	av = newAV (); /* will be @_ */	255	return newpadlist;
145	av_extend (av, 0);	256	}
146	av_store (newpad, 0, (SV *) av);
147	AvFLAGS (av) = AVf_REIFY;
148		257
149	for (ix = fpad; ix > 0; ix--)	258	static void
		259	free_padlist (pTHX_ AV *padlist)
		260	{
		261	/* may be during global destruction */
		262	if (SvREFCNT (padlist))
150	{	263	{
151	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	264	I32 i = AvFILLp (padlist);
152	if (namesv && namesv != &PL_sv_undef)	265	while (i >= 0)
153	{	266	{
154	char name = SvPVX (namesv); / XXX */	267	SV **svp = av_fetch (padlist, i--, FALSE);
155	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	268	if (svp)
156	{ /* lexical from outside? */
157	npad[ix] = SvREFCNT_inc (ppad[ix]);
158	}	269	{
159	else
160	{ /* our own lexical */
161	SV *sv;	270	SV *sv;
162	if (*name == '&')	271	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
163	sv = SvREFCNT_inc (ppad[ix]);	272	SvREFCNT_dec (sv);
164	else if (*name == '@')	273
165	sv = (SV *) newAV ();	274	SvREFCNT_dec (*svp);
166	else if (*name == '%')
167	sv = (SV *) newHV ();
168	else
169	sv = NEWSV (0, 0);
170	if (!SvPADBUSY (sv))
171	SvPADMY_on (sv);
172	npad[ix] = sv;
173	}	275	}
174	}	276	}
175	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
176	{
177	npad[ix] = SvREFCNT_inc (ppad[ix]);
178	}
179	else
180	{
181	SV *sv = NEWSV (0, 0);
182	SvPADTMP_on (sv);
183	npad[ix] = sv;
184	}
185	}
186		277
187	#if 0 /* return -ENOTUNDERSTOOD */
188	/* Now that vars are all in place, clone nested closures. */
189
190	for (ix = fpad; ix > 0; ix--) {
191	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
192	if (namesv
193	&& namesv != &PL_sv_undef
194	&& !(SvFLAGS(namesv) & SVf_FAKE)
195	&& *SvPVX(namesv) == '&'
196	&& CvCLONE(ppad[ix]))
197	{
198	CV kid = cv_clone((CV)ppad[ix]);
199	SvREFCNT_dec(ppad[ix]);
200	CvCLONE_on(kid);
201	SvPADMY_on(kid);
202	npad[ix] = (SV*)kid;
203	}
204	}
205	#endif
206
207	return newpadlist;
208	}
209
210	#ifdef MAY_FLUSH
211	STATIC AV *
212	free_padlist (AV *padlist)
213	{
214	/* may be during global destruction */
215	if (SvREFCNT(padlist))
216	{
217	I32 i = AvFILLp(padlist);
218	while (i >= 0)
219	{
220	SV **svp = av_fetch(padlist, i--, FALSE);
221	SV sv = svp ? svp : Nullsv;
222	if (sv)
223	SvREFCNT_dec(sv);
224	}
225
226	SvREFCNT_dec((SV*)padlist);	278	SvREFCNT_dec ((SV*)padlist);
227	}	279	}
228	}	280	}
229	#endif	281
		282	static int
		283	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		284	{
		285	AV *padlist;
		286	AV av = (AV )mg->mg_obj;
		287
		288	/* casting is fun. */
		289	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		290	free_padlist (aTHX_ padlist);
		291
		292	SvREFCNT_dec (av);
		293
		294	return 0;
		295	}
		296
		297	#define PERL_MAGIC_coro PERL_MAGIC_ext
		298
		299	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		300
		301	#define CORO_MAGIC(cv) \
		302	SvMAGIC (cv) \
		303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		304	? SvMAGIC (cv) \
		305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		306	: 0
		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
230		333
231	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
232	STATIC void	335	static void
233	get_padlist (CV *cv)	336	get_padlist (pTHX_ CV *cv)
234	{	337	{
235	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	338	MAGIC *mg = CORO_MAGIC (cv);
		339	AV *av;
236		340
237	if (he && AvFILLp ((AV )he) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
238	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
239	else	343	else
240	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
241	}
242
243	STATIC void
244	put_padlist (CV *cv)
245	{
246	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
247
248	if (SvTYPE (*he) != SVt_PVAV)
249	{	344	{
		345	#if CORO_PREFER_PERL_FUNCTIONS
		346	/* this is probably cleaner, but also slower? */
		347	CV *cp = Perl_cv_clone (cv);
		348	CvPADLIST (cv) = CvPADLIST (cp);
		349	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (*he);	350	SvREFCNT_dec (cp);
251	he = (SV )newAV ();	351	#else
		352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		353	#endif
252	}	354	}
253
254	av_push ((AV )he, (SV *)CvPADLIST (cv));
255	}	355	}
256		356
257	#ifdef MAY_FLUSH	357	static void
258	STATIC void	358	put_padlist (pTHX_ CV *cv)
259	flush_padlist_cache ()
260	{	359	{
261	HV *hv = padlist_cache;	360	MAGIC *mg = CORO_MAGIC (cv);
262	padlist_cache = newHV ();	361	AV *av;
263		362
264	if (hv_iterinit (hv))	363	if (!mg)
265	{
266	HE *he;
267	AV *padlist;
268
269	while (!!(he = hv_iternext (hv)))
270	{
271	AV av = (AV )HeVAL(he);
272
273	/* casting is fun. */
274	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
275	free_padlist (padlist);
276	}
277	}	364	{
		365	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		366	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		367	mg->mg_virtual = &vtbl_coro;
		368	mg->mg_obj = (SV *)newAV ();
		369	}
278		370
279	SvREFCNT_dec (hv);	371	av = (AV *)mg->mg_obj;
280	}
281	#endif
282		372
283	#define SB do {	373	if (AvFILLp (av) >= AvMAX (av))
284	#define SE } while (0)	374	av_extend (av, AvMAX (av) + 1);
285		375
286	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
287	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	377	}
288		378
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	379	/ load & save, init *****************************************************/
290		380
291	static void	381	static void
292	load_state(pTHX_ Coro__State c)	382	load_perl (pTHX_ Coro__State c)
293	{	383	{
294	PL_dowarn = c->dowarn;	384	#define VAR(name,type) PL_ ## name = c->name;
		385	# include "state.h"
		386	#undef VAR
295		387
296	PL_curstackinfo = c->curstackinfo;	388	GvSV (PL_defgv) = c->defsv;
297	PL_curstack = c->curstack;	389	GvAV (PL_defgv) = c->defav;
298	PL_mainstack = c->mainstack;	390	GvSV (PL_errgv) = c->errsv;
299	PL_stack_sp = c->stack_sp;	391	GvIOp(PL_defoutgv) = c->deffh;
300	PL_op = c->op;	392	PL_rs = c->irssv;
301	PL_curpad = c->curpad;	393	GvSV (irsgv) = c->irssv_sv;
302	PL_stack_base = c->stack_base;
303	PL_stack_max = c->stack_max;
304	PL_tmps_stack = c->tmps_stack;
305	PL_tmps_floor = c->tmps_floor;
306	PL_tmps_ix = c->tmps_ix;
307	PL_tmps_max = c->tmps_max;
308	PL_markstack = c->markstack;
309	PL_markstack_ptr = c->markstack_ptr;
310	PL_markstack_max = c->markstack_max;
311	PL_scopestack = c->scopestack;
312	PL_scopestack_ix = c->scopestack_ix;
313	PL_scopestack_max = c->scopestack_max;
314	PL_savestack = c->savestack;
315	PL_savestack_ix = c->savestack_ix;
316	PL_savestack_max = c->savestack_max;
317	PL_retstack = c->retstack;
318	PL_retstack_ix = c->retstack_ix;
319	PL_retstack_max = c->retstack_max;
320	PL_curcop = c->curcop;
321	PL_start_env = c->start_env;
322	PL_top_env = c->top_env;
323
324	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
325	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
326	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
327		394
328	{	395	{
329	dSP;	396	dSP;
330	CV *cv;	397	CV *cv;
331		398
332	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
333	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
334	{	401	{
335	AV padlist = (AV )POPs;
336
337	if (padlist)
338	{
339	put_padlist (cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
340	CvPADLIST(cv) = padlist;	403	CvDEPTH (cv) = PTR2IV (POPs);
341	#ifdef USE_THREADS	404	CvPADLIST (cv) = (AV *)POPs;
342	/CvOWNER(cv) = (struct perl_thread )POPs;*/
343	#endif
344	}
345
346	++CvDEPTH(cv);
347	}	405	}
348		406
349	PUTBACK;	407	PUTBACK;
350	}	408	}
351	}	409	}
352		410
353	static void	411	static void
354	save_state(pTHX_ Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
355	{	413	{
356	{	414	{
357	dSP;	415	dSP;
358	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
359	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
362	/*	420	/*
363	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
364	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
365	*/	423	*/
366		424
367	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
368	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
369	for (;;)	427	for (;;)
370	{	428	{
371	do	429	while (cxix >= 0)
372	{	430	{
373	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
374		432
375	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
376	{	434	{
377	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
		436
378	if (CvDEPTH(cv))	437	if (CvDEPTH (cv))
379	{	438	{
380	#ifdef USE_THREADS
381	/XPUSHs ((SV )CvOWNER(cv));*/
382	/CvOWNER(cv) = 0;/
383	/error must unlock this cv etc.. etc.../
384	#endif
385	EXTEND (SP, CvDEPTH(cv)*2);	439	EXTEND (SP, 3);
386
387	while (--CvDEPTH(cv))
388	{
389	/* this tells the restore code to increment CvDEPTH */
390	PUSHs (Nullsv);
391	PUSHs ((SV *)cv);
392	}
393
394	PUSHs ((SV *)CvPADLIST(cv));	440	PUSHs ((SV *)CvPADLIST (cv));
		441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
396		443
397	get_padlist (cv); /* this is a monster */	444	CvDEPTH (cv) = 0;
		445	get_padlist (aTHX_ cv);
398	}	446	}
399	}	447	}
400	else if (CxTYPE(cx) == CXt_FORMAT)
401	{
402	/* I never used formats, so how should I know how these are implemented? */
403	/* my bold guess is as a simple, plain sub... */
404	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405	}
406	}	448	}
407	while (cxix >= 0);
408		449
409	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
410	break;	451	break;
411		452
412	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
413	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
414	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
415	}	456	}
416		457
417	PUTBACK;	458	PUTBACK;
418	}	459	}
419		460
420	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
421	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
422	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = GvIOp (PL_defoutgv);
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
423		467
424	/* I have not the slightest idea of why av_reify is necessary */	468	#define VAR(name,type)c->name = PL_ ## name;
425	/* but if it's missing the defav contents magically get replaced sometimes */	469	# include "state.h"
426	if (c->defav)	470	#undef VAR
427	av_reify (c->defav);
428
429	c->dowarn = PL_dowarn;
430
431	c->curstackinfo = PL_curstackinfo;
432	c->curstack = PL_curstack;
433	c->mainstack = PL_mainstack;
434	c->stack_sp = PL_stack_sp;
435	c->op = PL_op;
436	c->curpad = PL_curpad;
437	c->stack_base = PL_stack_base;
438	c->stack_max = PL_stack_max;
439	c->tmps_stack = PL_tmps_stack;
440	c->tmps_floor = PL_tmps_floor;
441	c->tmps_ix = PL_tmps_ix;
442	c->tmps_max = PL_tmps_max;
443	c->markstack = PL_markstack;
444	c->markstack_ptr = PL_markstack_ptr;
445	c->markstack_max = PL_markstack_max;
446	c->scopestack = PL_scopestack;
447	c->scopestack_ix = PL_scopestack_ix;
448	c->scopestack_max = PL_scopestack_max;
449	c->savestack = PL_savestack;
450	c->savestack_ix = PL_savestack_ix;
451	c->savestack_max = PL_savestack_max;
452	c->retstack = PL_retstack;
453	c->retstack_ix = PL_retstack_ix;
454	c->retstack_max = PL_retstack_max;
455	c->curcop = PL_curcop;
456	c->start_env = PL_start_env;
457	c->top_env = PL_top_env;
458	}	471	}
459		472
460	/*	473	/*
461	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
462	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
463	* on the assumption that coroutines do not usually need	476	* on the (sometimes correct) assumption that coroutines do
464	* a lot of stackspace.	477	* not usually need a lot of stackspace.
465	*/	478	*/
466	STATIC void	479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
		482	static void
467	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
468	{	484	{
469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	485	PL_curstackinfo = new_stackinfo(64, 6);
470	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473		489
474	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
475	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477		493
478	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
479	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
480	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
481	PL_tmps_max = 96;	497	PL_tmps_max = 64;
482		498
483	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
484	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
486		502
		503	#ifdef SET_MARK_OFFSET
487	SET_MARK_OFFSET;	504	SET_MARK_OFFSET;
		505	#endif
488		506
489	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
490	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
491	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
492		510
493	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
494	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
495	PL_savestack_max = 96;	513	PL_savestack_max = 64;
496		514
		515	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
498	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	518	PL_retstack_max = 4;
		519	#endif
500	}	520	}
		521	#endif
501		522
502	/*	523	/*
503	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
504	* still there is a memleak of 128 bytes...
505	*/	525	*/
506	STATIC void	526	static void
507	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
508	{	528	{
509	/* is this ugly, I ask? */
510	while (PL_scopestack_ix)
511	LEAVE;
512
513	/* sure it is, but more important: is it correct?? :/ */
514	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515	FREETMPS;
516
517	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
519		531
520	while (PL_curstackinfo)	532	while (PL_curstackinfo)
521	{	533	{
522	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
523		535
524	{	536	if (!IN_DESTRUCT)
525	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */
528	}
529
530	dounwind(-1);
531
532	SvREFCNT_dec(PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
		538
533	Safefree(PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
534	Safefree(PL_curstackinfo);	540	Safefree (PL_curstackinfo);
535	PL_curstackinfo = p;	541	PL_curstackinfo = p;
536	}	542	}
537		543
538	Safefree(PL_tmps_stack);	544	Safefree (PL_tmps_stack);
539	Safefree(PL_markstack);	545	Safefree (PL_markstack);
540	Safefree(PL_scopestack);	546	Safefree (PL_scopestack);
541	Safefree(PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
542	Safefree(PL_retstack);	549	Safefree (PL_retstack);
543	}
544
545	static void
546	allocate_stack (Coro__State ctx, int alloc)
547	{
548	coro_stack *stack;
549
550	New (0, stack, 1, coro_stack);
551
552	stack->refcnt = 1;
553	stack->usecnt = 1;
554	stack->gencnt = ctx->gencnt = 0;
555	if (alloc)
556	{
557	#ifdef HAVE_MMAP
558	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
559	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
560	if (stack->sptr == (void *)-1)
561	#endif	550	#endif
		551	}
		552
		553	static size_t
		554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
562	{	561	{
563	/FIXME//D//* reasonable stack size! */	562	#define VAR(name,type)coro->name = PL_ ## name;
564	stack->ssize = -4096 * sizeof (long);	563	# include "state.h"
565	New (0, stack->sptr, 4096, long);	564	#undef VAR
566	}	565	}
567	}
568	else
569	stack->sptr = 0;
570		566
571	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
572	}	568	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
573		575
574	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
575	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
576	{	578	#endif
577	coro_stack *stack = ctx->stack;
578
579	ctx->stack = 0;
580
581	if (stack)
582	{	579	}
583	if (!--stack->refcnt)
584	{
585	#ifdef HAVE_MMAP
586	if (stack->ssize > 0 && stack->sptr)
587	munmap (stack->sptr, stack->ssize);
588	else
589	#else
590	Safefree (stack->sptr);
591	#endif
592	Safefree (stack);
593	}
594	else if (ctx->gencnt == stack->gencnt)
595	--stack->usecnt;
596	}
597	}
598		580
		581	return rss;
		582	}
		583
		584	/ coroutine stack handling **********************************************/
		585
599	static void	586	static void
600	setup_coro (void *arg)	587	setup_coro (pTHX_ struct coro *coro)
601	{	588	{
602	/*	589	/*
603	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
604	*/	591	*/
		592	coro_init_stacks (aTHX);
		593
		594	PL_runops = RUNOPS_DEFAULT;
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVsv (PL_rs);
		607	PL_rs = newSVpvn ("\n", 1);
		608
		609	{
		610	IO *io = newIO ();
		611	GvIOp(PL_defoutgv) = io;
		612	IoTYPE (io) = IoTYPE_WRONLY;
		613	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		614	IoFLAGS (io) \|= IOf_FLUSH;
		615	}
		616
		617	{
		618	dSP;
		619	LOGOP myop;
		620
		621	Zero (&myop, 1, LOGOP);
		622	myop.op_next = Nullop;
		623	myop.op_flags = OPf_WANT_VOID;
		624
		625	PUSHMARK (SP);
		626	XPUSHs (av_shift (GvAV (PL_defgv)));
		627	PUTBACK;
		628	PL_op = (OP *)&myop;
		629	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		630	SPAGAIN;
		631	}
		632
		633	ENTER; /* necessary e.g. for dounwind */
		634	}
		635
		636	static void
		637	destroy_coro (pTHX_ struct coro *coro)
		638	{
		639	if (!IN_DESTRUCT)
		640	{
		641	/* restore all saved variables and stuff */
		642	LEAVE_SCOPE (0);
		643	assert (PL_tmps_floor == -1);
		644
		645	/* free all temporaries */
		646	FREETMPS;
		647	assert (PL_tmps_ix == -1);
		648
		649	/* unwind all extra stacks */
		650	POPSTACK_TO (PL_mainstack);
		651
		652	/* unwind main stack */
		653	dounwind (-1);
		654	}
		655
		656	SvREFCNT_dec (GvSV (PL_defgv));
		657	SvREFCNT_dec (GvAV (PL_defgv));
		658	SvREFCNT_dec (GvSV (PL_errgv));
		659	SvREFCNT_dec (GvIOp(PL_defoutgv));
		660	SvREFCNT_dec (PL_rs);
		661	SvREFCNT_dec (GvSV (irsgv));
		662
		663	coro_destroy_stacks (aTHX);
		664	}
		665
		666	static void
		667	free_coro_mortal (pTHX)
		668	{
		669	if (coro_mortal)
		670	{
		671	SvREFCNT_dec (coro_mortal);
		672	coro_mortal = 0;
		673	}
		674	}
		675
		676	static int
		677	runops_trace (pTHX)
		678	{
		679	COP *oldcop = 0;
		680	int oldcxix = -2;
		681	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		682	coro_cctx *cctx = coro->cctx;
		683
		684	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		685	{
		686	PERL_ASYNC_CHECK ();
		687
		688	if (cctx->flags & CC_TRACE_ALL)
		689	{
		690	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		691	{
		692	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		693	SV bot, top;
		694	AV av = newAV (); / return values */
		695	SV **cb;
		696	dSP;
		697
		698	GV *gv = CvGV (cx->blk_sub.cv);
		699	SV *fullname = sv_2mortal (newSV (0));
		700	if (isGV (gv))
		701	gv_efullname3 (fullname, gv, 0);
		702
		703	bot = PL_stack_base + cx->blk_oldsp + 1;
		704	top = cx->blk_gimme == G_ARRAY ? SP + 1
		705	: cx->blk_gimme == G_SCALAR ? bot + 1
		706	: bot;
		707
		708	while (bot < top)
		709	av_push (av, SvREFCNT_inc (*bot++));
		710
		711	PL_runops = RUNOPS_DEFAULT;
		712	ENTER;
		713	SAVETMPS;
		714	EXTEND (SP, 3);
		715	PUSHMARK (SP);
		716	PUSHs (&PL_sv_no);
		717	PUSHs (fullname);
		718	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		719	PUTBACK;
		720	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		721	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		722	SPAGAIN;
		723	FREETMPS;
		724	LEAVE;
		725	PL_runops = runops_trace;
		726	}
		727
		728	if (oldcop != PL_curcop)
		729	{
		730	oldcop = PL_curcop;
		731
		732	if (PL_curcop != &PL_compiling)
		733	{
		734	SV **cb;
		735
		736	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		737	{
		738	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		739
		740	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		741	{
		742	runops_proc_t old_runops = PL_runops;
		743	dSP;
		744	GV *gv = CvGV (cx->blk_sub.cv);
		745	SV *fullname = sv_2mortal (newSV (0));
		746
		747	if (isGV (gv))
		748	gv_efullname3 (fullname, gv, 0);
		749
		750	PL_runops = RUNOPS_DEFAULT;
		751	ENTER;
		752	SAVETMPS;
		753	EXTEND (SP, 3);
		754	PUSHMARK (SP);
		755	PUSHs (&PL_sv_yes);
		756	PUSHs (fullname);
		757	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		758	PUTBACK;
		759	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		760	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		761	SPAGAIN;
		762	FREETMPS;
		763	LEAVE;
		764	PL_runops = runops_trace;
		765	}
		766
		767	oldcxix = cxstack_ix;
		768	}
		769
		770	if (cctx->flags & CC_TRACE_LINE)
		771	{
		772	dSP;
		773
		774	PL_runops = RUNOPS_DEFAULT;
		775	ENTER;
		776	SAVETMPS;
		777	EXTEND (SP, 3);
		778	PL_runops = RUNOPS_DEFAULT;
		779	PUSHMARK (SP);
		780	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		781	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		782	PUTBACK;
		783	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		784	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		785	SPAGAIN;
		786	FREETMPS;
		787	LEAVE;
		788	PL_runops = runops_trace;
		789	}
		790	}
		791	}
		792	}
		793	}
		794
		795	TAINT_NOT;
		796	return 0;
		797	}
		798
		799	/* inject a fake call to Coro::State::_cctx_init into the execution */
		800	/* _cctx_init should be careful, as it could be called at almost any time */
		801	/* during execution of a perl program */
		802	static void NOINLINE
		803	prepare_cctx (pTHX_ coro_cctx *cctx)
		804	{
605	dSP;	805	dSP;
606	Coro__State ctx = (Coro__State)arg;	806	LOGOP myop;
607	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
608		807
609	coro_init_stacks (aTHX);	808	PL_top_env = &PL_start_env;
610	JMPENV_BOOTSTRAP;	809
		810	if (cctx->flags & CC_TRACE)
		811	PL_runops = runops_trace;
		812
		813	Zero (&myop, 1, LOGOP);
		814	myop.op_next = PL_op;
		815	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		816
		817	PUSHMARK (SP);
		818	EXTEND (SP, 2);
		819	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		820	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		821	PUTBACK;
		822	PL_op = (OP *)&myop;
		823	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
611	SPAGAIN;	824	SPAGAIN;
		825	}
612		826
613	/PL_curcop = 0;/	827	/*
614	SvREFCNT_dec (GvAV (PL_defgv));	828	* this is a _very_ stripped down perl interpreter ;)
615	GvAV (PL_defgv) = ctx->args;	829	*/
		830	static void
		831	coro_run (void *arg)
		832	{
		833	dTHX;
616		834
617	if (ctx->stack)	835	/* coro_run is the alternative tail of transfer(), so unlock here. */
618	{	836	UNLOCK;
619	ctx->cursp = 0;
620		837
621	PUSHMARK(SP);	838	/* we now skip the entersub that lead to transfer() */
622	PUTBACK;	839	PL_op = PL_op->op_next;
623	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	840
624	croak ("FATAL: CCTXT coroutine returned!");	841	/* inject a fake subroutine call to cctx_init */
		842	prepare_cctx (aTHX_ (coro_cctx *)arg);
		843
		844	/* somebody or something will hit me for both perl_run and PL_restartop */
		845	PL_restartop = PL_op;
		846	perl_run (PL_curinterp);
		847
		848	/*
		849	* If perl-run returns we assume exit() was being called or the coro
		850	* fell off the end, which seems to be the only valid (non-bug)
		851	* reason for perl_run to return. We try to exit by jumping to the
		852	* bootstrap-time "top" top_env, as we cannot restore the "main"
		853	* coroutine as Coro has no such concept
		854	*/
		855	PL_top_env = main_top_env;
		856	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		857	}
		858
		859	static coro_cctx *
		860	cctx_new ()
		861	{
		862	coro_cctx *cctx;
		863	void *stack_start;
		864	size_t stack_size;
		865
		866	++cctx_count;
		867
		868	Newz (0, cctx, 1, coro_cctx);
		869
		870	#if HAVE_MMAP
		871
		872	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		873	/* mmap supposedly does allocate-on-write for us */
		874	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		875
		876	if (cctx->sptr != (void *)-1)
		877	{
		878	# if CORO_STACKGUARD
		879	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		880	# endif
		881	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		882	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		883	cctx->flags \|= CC_MAPPED;
625	}	884	}
626	else	885	else
627	{	886	#endif
628	UNOP myop;
629
630	PL_op = (OP *)&myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PUSHMARK(SP);
637	XPUSHs (sub_init);
638	/*
639	* the next line is slightly wrong, as PL_op->op_next
640	* is actually being executed so we skip the first op.
641	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)
644	*/
645	PUTBACK;
646	PL_op = pp_entersub();
647	SPAGAIN;
648
649	ENTER; /* necessary e.g. for dounwind */
650	}	887	{
651	}	888	cctx->ssize = coro_stacksize * (long)sizeof (long);
		889	New (0, cctx->sptr, coro_stacksize, long);
652		890
653	static void	891	if (!cctx->sptr)
654	continue_coro (void *arg)	892	{
655	{	893	perror ("FATAL: unable to allocate stack for coroutine");
656	/*	894	_exit (EXIT_FAILURE);
657	* this is a _very_ stripped down perl interpreter ;)	895	}
658	*/
659	Coro__State ctx = (Coro__State)arg;
660		896
661	ctx->cursp = 0;	897	stack_start = cctx->sptr;
662	PL_op = PL_op->op_next;	898	stack_size = cctx->ssize;
663	CALLRUNOPS(aTHX);	899	}
664	/NORETURN/
665	abort ();
666	}
667		900
668	STATIC void	901	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		902	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		903
		904	return cctx;
		905	}
		906
		907	static void
		908	cctx_destroy (coro_cctx *cctx)
		909	{
		910	if (!cctx)
		911	return;
		912
		913	--cctx_count;
		914
		915	#if CORO_USE_VALGRIND
		916	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		917	#endif
		918
		919	#if HAVE_MMAP
		920	if (cctx->flags & CC_MAPPED)
		921	munmap (cctx->sptr, cctx->ssize);
		922	else
		923	#endif
		924	Safefree (cctx->sptr);
		925
		926	Safefree (cctx);
		927	}
		928
		929	static coro_cctx *
		930	cctx_get (pTHX)
		931	{
		932	while (cctx_first)
		933	{
		934	coro_cctx *cctx = cctx_first;
		935	cctx_first = cctx->next;
		936	--cctx_idle;
		937
		938	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		939	return cctx;
		940
		941	cctx_destroy (cctx);
		942	}
		943
		944	return cctx_new ();
		945	}
		946
		947	static void
		948	cctx_put (coro_cctx *cctx)
		949	{
		950	/* free another cctx if overlimit */
		951	if (cctx_idle >= MAX_IDLE_CCTX)
		952	{
		953	coro_cctx *first = cctx_first;
		954	cctx_first = first->next;
		955	--cctx_idle;
		956
		957	cctx_destroy (first);
		958	}
		959
		960	++cctx_idle;
		961	cctx->next = cctx_first;
		962	cctx_first = cctx;
		963	}
		964
		965	/ coroutine switching ***************************************************/
		966
		967	static void NOINLINE
		968	transfer_check (pTHX_ struct coro prev, struct coro next)
		969	{
		970	if (prev != next)
		971	{
		972	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		973	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		974
		975	if (next->flags & CF_RUNNING)
		976	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		977
		978	if (next->flags & CF_DESTROYED)
		979	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		980
		981	if (PL_lex_state != LEX_NOTPARSING)
		982	croak ("Coro::State::transfer called while parsing, but this is not supported");
		983	}
		984	}
		985
		986	/* always use the TRANSFER macro */
		987	static void NOINLINE
669	transfer(pTHX_ struct coro prev, struct coro next, int flags)	988	transfer (pTHX_ struct coro prev, struct coro next)
670	{	989	{
671	dSP;
672	dSTACKLEVEL;	990	dSTACKLEVEL;
673		991
		992	/* sometimes transfer is only called to set idle_sp */
		993	if (!next)
		994	{
		995	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		996	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		997	}
674	if (prev != next)	998	else if (prev != next)
675	{	999	{
676	if (next->mainstack)	1000	coro_cctx *prev__cctx;
		1001
		1002	if (prev->flags & CF_NEW)
677	{	1003	{
678	SAVE (prev, flags);	1004	/* create a new empty context */
679	LOAD (next);	1005	Newz (0, prev->cctx, 1, coro_cctx);
680		1006	prev->flags &= ~CF_NEW;
681	/* mark this state as in-use */	1007	prev->flags \|= CF_RUNNING;
682	next->mainstack = 0;
683	next->tmps_ix = -2;
684
685	/* stacklevel changed? if yes, grab the stack for us! */
686	if (flags & TRANSFER_SAVE_CCTXT)
687	{
688	if (!prev->stack)
689	allocate_stack (prev, 0);
690	else if (prev->cursp != stacklevel
691	&& prev->stack->usecnt > 1)
692	{
693	prev->gencnt = ++prev->stack->gencnt;
694	prev->stack->usecnt = 1;
695	}
696
697	/* has our stack been invalidated? */
698	if (next->stack && next->stack->gencnt != next->gencnt)
699	{
700	deallocate_stack (next);
701	allocate_stack (next, 1);
702	coro_create (&(next->stack->cctx),
703	continue_coro, (void *)next,
704	next->stack->sptr, labs (next->stack->ssize));
705	}
706
707	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
708	}
709
710	}	1008	}
711	else if (next->tmps_ix == -2)	1009
712	croak ("tried to transfer to running coroutine");	1010	prev->flags &= ~CF_RUNNING;
		1011	next->flags \|= CF_RUNNING;
		1012
		1013	LOCK;
		1014
		1015	if (next->flags & CF_NEW)
		1016	{
		1017	/* need to start coroutine */
		1018	next->flags &= ~CF_NEW;
		1019	/* first get rid of the old state */
		1020	save_perl (aTHX_ prev);
		1021	/* setup coroutine call */
		1022	setup_coro (aTHX_ next);
		1023	}
713	else	1024	else
714	{	1025	{
715	SAVE (prev, -1); /* first get rid of the old state */	1026	/* coroutine already started */
716		1027	save_perl (aTHX_ prev);
717	if (flags & TRANSFER_SAVE_CCTXT)	1028	load_perl (aTHX_ next);
718	{
719	if (!prev->stack)
720	allocate_stack (prev, 0);
721
722	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
723	{
724	setup_coro (next);
725
726	prev->stack->refcnt++;
727	prev->stack->usecnt++;
728	next->stack = prev->stack;
729	next->gencnt = prev->gencnt;
730	}
731	else
732	{
733	allocate_stack (next, 1);
734	coro_create (&(next->stack->cctx),
735	setup_coro, (void *)next,
736	next->stack->sptr, labs (next->stack->ssize));
737	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
738	}
739	}
740	else
741	setup_coro (next);
742	}	1029	}
		1030
		1031	prev__cctx = prev->cctx;
		1032
		1033	/* possibly "free" the cctx */
		1034	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
		1035	{
		1036	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1037	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1038
		1039	prev->cctx = 0;
		1040
		1041	cctx_put (prev__cctx);
		1042	}
		1043
		1044	++next->usecount;
		1045
		1046	if (!next->cctx)
		1047	next->cctx = cctx_get (aTHX);
		1048
		1049	if (prev__cctx != next->cctx)
		1050	{
		1051	prev__cctx->top_env = PL_top_env;
		1052	PL_top_env = next->cctx->top_env;
		1053	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1054	}
		1055
		1056	free_coro_mortal (aTHX);
		1057	UNLOCK;
		1058	}
		1059	}
		1060
		1061	struct transfer_args
		1062	{
		1063	struct coro prev, next;
		1064	};
		1065
		1066	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1067	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1068
		1069	/ high level stuff ******************************************************/
		1070
		1071	static int
		1072	coro_state_destroy (pTHX_ struct coro *coro)
		1073	{
		1074	if (coro->flags & CF_DESTROYED)
		1075	return 0;
		1076
		1077	coro->flags \|= CF_DESTROYED;
		1078
		1079	if (coro->flags & CF_READY)
743	}	1080	{
		1081	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1082	/* alternative: look through all ready queues and remove the coro */
		1083	LOCK;
		1084	--coro_nready;
		1085	UNLOCK;
		1086	}
		1087	else
		1088	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
744		1089
745	next->cursp = stacklevel;	1090	if (coro->mainstack && coro->mainstack != main_mainstack)
746	}	1091	{
		1092	struct coro temp;
747		1093
		1094	if (coro->flags & CF_RUNNING)
		1095	croak ("FATAL: tried to destroy currently running coroutine");
		1096
		1097	save_perl (aTHX_ &temp);
		1098	load_perl (aTHX_ coro);
		1099
		1100	destroy_coro (aTHX_ coro);
		1101
		1102	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1103
		1104	coro->mainstack = 0;
		1105	}
		1106
		1107	cctx_destroy (coro->cctx);
		1108	SvREFCNT_dec (coro->args);
		1109
		1110	if (coro->next) coro->next->prev = coro->prev;
		1111	if (coro->prev) coro->prev->next = coro->next;
		1112	if (coro == coro_first) coro_first = coro->next;
		1113
		1114	return 1;
		1115	}
		1116
		1117	static int
		1118	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1119	{
		1120	struct coro coro = (struct coro )mg->mg_ptr;
		1121	mg->mg_ptr = 0;
		1122
		1123	coro->hv = 0;
		1124
		1125	if (--coro->refcnt < 0)
		1126	{
		1127	coro_state_destroy (aTHX_ coro);
		1128	Safefree (coro);
		1129	}
		1130
		1131	return 0;
		1132	}
		1133
		1134	static int
		1135	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1136	{
		1137	struct coro coro = (struct coro )mg->mg_ptr;
		1138
		1139	++coro->refcnt;
		1140
		1141	return 0;
		1142	}
		1143
		1144	static MGVTBL coro_state_vtbl = {
		1145	0, 0, 0, 0,
		1146	coro_state_free,
		1147	0,
		1148	#ifdef MGf_DUP
		1149	coro_state_dup,
		1150	#else
		1151	# define MGf_DUP 0
		1152	#endif
		1153	};
		1154
		1155	static void
		1156	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1157	{
		1158	ta->prev = SvSTATE (prev_sv);
		1159	ta->next = SvSTATE (next_sv);
		1160	TRANSFER_CHECK (*ta);
		1161	}
		1162
		1163	static void
		1164	api_transfer (SV prev_sv, SV next_sv)
		1165	{
		1166	dTHX;
		1167	struct transfer_args ta;
		1168
		1169	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1170	TRANSFER (ta);
		1171	}
		1172
		1173	/ Coro ******************************************************************/
		1174
		1175	static void
		1176	coro_enq (pTHX_ SV *coro_sv)
		1177	{
		1178	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1179	}
		1180
		1181	static SV *
		1182	coro_deq (pTHX_ int min_prio)
		1183	{
		1184	int prio = PRIO_MAX - PRIO_MIN;
		1185
		1186	min_prio -= PRIO_MIN;
		1187	if (min_prio < 0)
		1188	min_prio = 0;
		1189
		1190	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1191	if (AvFILLp (coro_ready [prio]) >= 0)
		1192	return av_shift (coro_ready [prio]);
		1193
		1194	return 0;
		1195	}
		1196
		1197	static int
		1198	api_ready (SV *coro_sv)
		1199	{
		1200	dTHX;
		1201	struct coro *coro;
		1202
		1203	if (SvROK (coro_sv))
		1204	coro_sv = SvRV (coro_sv);
		1205
		1206	coro = SvSTATE (coro_sv);
		1207
		1208	if (coro->flags & CF_READY)
		1209	return 0;
		1210
		1211	coro->flags \|= CF_READY;
		1212
		1213	LOCK;
		1214	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1215	++coro_nready;
		1216	UNLOCK;
		1217
		1218	return 1;
		1219	}
		1220
		1221	static int
		1222	api_is_ready (SV *coro_sv)
		1223	{
		1224	dTHX;
		1225	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1226	}
		1227
		1228	static void
		1229	prepare_schedule (pTHX_ struct transfer_args *ta)
		1230	{
		1231	SV prev_sv, next_sv;
		1232
		1233	for (;;)
		1234	{
		1235	LOCK;
		1236	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1237
		1238	/* nothing to schedule: call the idle handler */
		1239	if (!next_sv)
		1240	{
		1241	dSP;
		1242	UNLOCK;
		1243
		1244	ENTER;
		1245	SAVETMPS;
		1246
		1247	PUSHMARK (SP);
		1248	PUTBACK;
		1249	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1250
		1251	FREETMPS;
		1252	LEAVE;
		1253	continue;
		1254	}
		1255
		1256	ta->next = SvSTATE (next_sv);
		1257
		1258	/* cannot transfer to destroyed coros, skip and look for next */
		1259	if (ta->next->flags & CF_DESTROYED)
		1260	{
		1261	UNLOCK;
		1262	SvREFCNT_dec (next_sv);
		1263	/* coro_nready is already taken care of by destroy */
		1264	continue;
		1265	}
		1266
		1267	--coro_nready;
		1268	UNLOCK;
		1269	break;
		1270	}
		1271
		1272	/* free this only after the transfer */
		1273	prev_sv = SvRV (coro_current);
		1274	ta->prev = SvSTATE (prev_sv);
		1275	TRANSFER_CHECK (*ta);
		1276	assert (ta->next->flags & CF_READY);
		1277	ta->next->flags &= ~CF_READY;
		1278	SvRV_set (coro_current, next_sv);
		1279
		1280	LOCK;
		1281	free_coro_mortal (aTHX);
		1282	coro_mortal = prev_sv;
		1283	UNLOCK;
		1284	}
		1285
		1286	static void
		1287	prepare_cede (pTHX_ struct transfer_args *ta)
		1288	{
		1289	api_ready (coro_current);
		1290	prepare_schedule (aTHX_ ta);
		1291	}
		1292
		1293	static int
		1294	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1295	{
		1296	if (coro_nready)
		1297	{
		1298	SV *prev = SvRV (coro_current);
		1299	prepare_schedule (aTHX_ ta);
		1300	api_ready (prev);
		1301	return 1;
		1302	}
		1303	else
		1304	return 0;
		1305	}
		1306
		1307	static void
		1308	api_schedule (void)
		1309	{
		1310	dTHX;
		1311	struct transfer_args ta;
		1312
		1313	prepare_schedule (aTHX_ &ta);
		1314	TRANSFER (ta);
		1315	}
		1316
		1317	static int
		1318	api_cede (void)
		1319	{
		1320	dTHX;
		1321	struct transfer_args ta;
		1322
		1323	prepare_cede (aTHX_ &ta);
		1324
		1325	if (ta.prev != ta.next)
		1326	{
		1327	TRANSFER (ta);
		1328	return 1;
		1329	}
		1330	else
		1331	return 0;
		1332	}
		1333
		1334	static int
		1335	api_cede_notself (void)
		1336	{
		1337	dTHX;
		1338	struct transfer_args ta;
		1339
		1340	if (prepare_cede_notself (aTHX_ &ta))
		1341	{
		1342	TRANSFER (ta);
		1343	return 1;
		1344	}
		1345	else
		1346	return 0;
		1347	}
		1348
		1349	static void
		1350	api_trace (SV *coro_sv, int flags)
		1351	{
		1352	dTHX;
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354
		1355	if (flags & CC_TRACE)
		1356	{
		1357	if (!coro->cctx)
		1358	coro->cctx = cctx_new ();
		1359	else if (!(coro->cctx->flags & CC_TRACE))
		1360	croak ("cannot enable tracing on coroutine with custom stack");
		1361
		1362	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1363	}
		1364	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1365	{
		1366	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1367
		1368	if (coro->flags & CF_RUNNING)
		1369	PL_runops = RUNOPS_DEFAULT;
		1370	else
		1371	coro->runops = RUNOPS_DEFAULT;
		1372	}
		1373	}
		1374
748	MODULE = Coro::State PACKAGE = Coro::State	1375	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
749		1376
750	PROTOTYPES: ENABLE	1377	PROTOTYPES: DISABLE
751		1378
752	BOOT:	1379	BOOT:
753	{ /* {} necessary for stoopid perl-5.6.x */	1380	{
754	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1381	#ifdef USE_ITHREADS
755	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1382	MUTEX_INIT (&coro_mutex);
		1383	#endif
		1384	BOOT_PAGESIZE;
		1385
		1386	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1387
756	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1388	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
757		1389
758	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
759	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
760	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
761	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
762
763	if (!padlist_cache)
764	padlist_cache = newHV ();
765		1394
766	main_mainstack = PL_mainstack;	1395	main_mainstack = PL_mainstack;
767	}	1396	main_top_env = PL_top_env;
768		1397
769	Coro::State	1398	while (main_top_env->je_prev)
770	_newprocess(args)	1399	main_top_env = main_top_env->je_prev;
771	SV * args	1400
772	PROTOTYPE: $	1401	coroapi.ver = CORO_API_VERSION;
		1402	coroapi.transfer = api_transfer;
		1403
		1404	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1405	}
		1406
		1407	SV *
		1408	new (char *klass, ...)
773	CODE:	1409	CODE:
774	Coro__State coro;	1410	{
		1411	struct coro *coro;
		1412	HV *hv;
		1413	int i;
775		1414
776	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
777	croak ("Coro::State::_newprocess expects an arrayref");
778
779	New (0, coro, 1, struct coro);	1415	Newz (0, coro, 1, struct coro);
		1416	coro->args = newAV ();
		1417	coro->flags = CF_NEW;
780		1418
781	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1419	if (coro_first) coro_first->prev = coro;
782	coro->mainstack = 0; /* actual work is done inside transfer */	1420	coro->next = coro_first;
783	coro->stack = 0;	1421	coro_first = coro;
784		1422
785	RETVAL = coro;	1423	coro->hv = hv = newHV ();
		1424	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1425	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1426
		1427	for (i = 1; i < items; i++)
		1428	av_push (coro->args, newSVsv (ST (i)));
		1429	}
786	OUTPUT:	1430	OUTPUT:
787	RETVAL	1431	RETVAL
788		1432
		1433	# these not obviously related functions are all rolled into the same xs
		1434	# function to increase chances that they all will call transfer with the same
		1435	# stack offset
789	void	1436	void
790	transfer(prev, next, flags = TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK)	1437	_set_stacklevel (...)
791	Coro::State_or_hashref prev	1438	ALIAS:
792	Coro::State_or_hashref next	1439	Coro::State::transfer = 1
793	int flags	1440	Coro::schedule = 2
794	PROTOTYPE: @	1441	Coro::cede = 3
		1442	Coro::cede_notself = 4
795	CODE:	1443	CODE:
796	transfer (aTHX_ prev, next, flags);	1444	{
		1445	struct transfer_args ta;
		1446
		1447	switch (ix)
		1448	{
		1449	case 0:
		1450	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1451	ta.next = 0;
		1452	break;
		1453
		1454	case 1:
		1455	if (items != 2)
		1456	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1457
		1458	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1459	break;
		1460
		1461	case 2:
		1462	prepare_schedule (aTHX_ &ta);
		1463	break;
		1464
		1465	case 3:
		1466	prepare_cede (aTHX_ &ta);
		1467	break;
		1468
		1469	case 4:
		1470	if (!prepare_cede_notself (aTHX_ &ta))
		1471	XSRETURN_EMPTY;
		1472
		1473	break;
		1474	}
		1475
		1476	BARRIER;
		1477	TRANSFER (ta);
		1478
		1479	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1480	XSRETURN_YES;
		1481	}
		1482
		1483	bool
		1484	_destroy (SV *coro_sv)
		1485	CODE:
		1486	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1487	OUTPUT:
		1488	RETVAL
797		1489
798	void	1490	void
799	DESTROY(coro)	1491	_exit (code)
800	Coro::State coro	1492	int code
801	CODE:	1493	PROTOTYPE: $
		1494	CODE:
		1495	_exit (code);
802		1496
803	if (coro->mainstack && coro->mainstack != main_mainstack)	1497	int
		1498	cctx_stacksize (int new_stacksize = 0)
		1499	CODE:
		1500	RETVAL = coro_stacksize;
		1501	if (new_stacksize)
		1502	coro_stacksize = new_stacksize;
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	int
		1507	cctx_count ()
		1508	CODE:
		1509	RETVAL = cctx_count;
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	int
		1514	cctx_idle ()
		1515	CODE:
		1516	RETVAL = cctx_idle;
		1517	OUTPUT:
		1518	RETVAL
		1519
		1520	void
		1521	list ()
		1522	PPCODE:
		1523	{
		1524	struct coro *coro;
		1525	for (coro = coro_first; coro; coro = coro->next)
		1526	if (coro->hv)
		1527	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1528	}
		1529
		1530	void
		1531	call (Coro::State coro, SV *coderef)
		1532	ALIAS:
		1533	eval = 1
		1534	CODE:
		1535	{
		1536	if (coro->mainstack)
804	{	1537	{
805	struct coro temp;	1538	struct coro temp;
		1539	Zero (&temp, 1, struct coro);
806		1540
807	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1541	if (!(coro->flags & CF_RUNNING))
808	LOAD(aTHX_ coro);	1542	{
		1543	save_perl (aTHX_ &temp);
		1544	load_perl (aTHX_ coro);
		1545	}
809		1546
810	destroy_stacks (aTHX);	1547	{
		1548	dSP;
		1549	ENTER;
		1550	SAVETMPS;
		1551	PUSHMARK (SP);
		1552	PUTBACK;
		1553	if (ix)
		1554	eval_sv (coderef, 0);
		1555	else
		1556	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1557	SPAGAIN;
		1558	FREETMPS;
		1559	LEAVE;
		1560	PUTBACK;
		1561	}
811		1562
812	LOAD((&temp)); /* this will get rid of defsv etc.. */	1563	if (!(coro->flags & CF_RUNNING))
813		1564	{
814	coro->mainstack = 0;	1565	save_perl (aTHX_ coro);
		1566	load_perl (aTHX_ &temp);
		1567	}
815	}	1568	}
		1569	}
816		1570
817	deallocate_stack (coro);	1571	SV *
818		1572	is_ready (Coro::State coro)
819	Safefree (coro);	1573	PROTOTYPE: $
		1574	ALIAS:
		1575	is_ready = CF_READY
		1576	is_running = CF_RUNNING
		1577	is_new = CF_NEW
		1578	is_destroyed = CF_DESTROYED
		1579	CODE:
		1580	RETVAL = boolSV (coro->flags & ix);
		1581	OUTPUT:
		1582	RETVAL
820		1583
821	void	1584	void
822	flush()	1585	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1586
		1587	SV *
		1588	has_stack (Coro::State coro)
		1589	PROTOTYPE: $
823	CODE:	1590	CODE:
824	#ifdef MAY_FLUSH	1591	RETVAL = boolSV (!!coro->cctx);
825	flush_padlist_cache ();	1592	OUTPUT:
826	#endif	1593	RETVAL
827		1594
		1595	int
		1596	is_traced (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	IV
		1604	rss (Coro::State coro)
		1605	PROTOTYPE: $
		1606	ALIAS:
		1607	usecount = 1
		1608	CODE:
		1609	switch (ix)
		1610	{
		1611	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1612	case 1: RETVAL = coro->usecount; break;
		1613	}
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617
828	MODULE = Coro::State PACKAGE = Coro::Cont	1618	MODULE = Coro::State PACKAGE = Coro
829		1619
830	# this is slightly dirty	1620	BOOT:
		1621	{
		1622	int i;
		1623
		1624	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1625	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1626	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1627
		1628	coro_current = get_sv ("Coro::current", FALSE);
		1629	SvREADONLY_on (coro_current);
		1630
		1631	coro_stash = gv_stashpv ("Coro", TRUE);
		1632
		1633	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1634	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1635	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1636	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1637	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1638	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1639
		1640	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1641	coro_ready[i] = newAV ();
		1642
		1643	{
		1644	SV *sv = perl_get_sv("Coro::API", 1);
		1645
		1646	coroapi.schedule = api_schedule;
		1647	coroapi.cede = api_cede;
		1648	coroapi.cede_notself = api_cede_notself;
		1649	coroapi.ready = api_ready;
		1650	coroapi.is_ready = api_is_ready;
		1651	coroapi.nready = &coro_nready;
		1652	coroapi.current = coro_current;
		1653
		1654	GCoroAPI = &coroapi;
		1655	sv_setiv (sv, (IV)&coroapi);
		1656	SvREADONLY_on (sv);
		1657	}
		1658	}
831		1659
832	void	1660	void
833	yield(...)	1661	_set_current (SV *current)
834	PROTOTYPE: @	1662	PROTOTYPE: $
		1663	CODE:
		1664	SvREFCNT_dec (SvRV (coro_current));
		1665	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1666
		1667	int
		1668	prio (Coro::State coro, int newprio = 0)
		1669	ALIAS:
		1670	nice = 1
835	CODE:	1671	CODE:
836	static SV *returnstk;	1672	{
837	SV *sv;	1673	RETVAL = coro->prio;
		1674
		1675	if (items > 1)
		1676	{
		1677	if (ix)
		1678	newprio = coro->prio - newprio;
		1679
		1680	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1681	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1682
		1683	coro->prio = newprio;
		1684	}
		1685	}
		1686	OUTPUT:
		1687	RETVAL
		1688
		1689	SV *
		1690	ready (SV *self)
		1691	PROTOTYPE: $
		1692	CODE:
		1693	RETVAL = boolSV (api_ready (self));
		1694	OUTPUT:
		1695	RETVAL
		1696
		1697	int
		1698	nready (...)
		1699	PROTOTYPE:
		1700	CODE:
		1701	RETVAL = coro_nready;
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	# for async_pool speedup
		1706	void
		1707	_pool_1 (SV *cb)
		1708	CODE:
		1709	{
		1710	int i, len;
		1711	HV hv = (HV )SvRV (coro_current);
838	AV *defav = GvAV (PL_defgv);	1712	AV *defav = GvAV (PL_defgv);
839	struct coro prev, next;	1713	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1714	AV *invoke_av;
840		1715
841	if (!returnstk)	1716	if (!invoke)
842	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1717	croak ("\3terminate\2\n");
843		1718
844	/* set up @_ -- ugly */	1719	hv_store (hv, "desc", sizeof ("desc") - 1,
845	av_clear (defav);	1720	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1721
		1722	invoke_av = (AV *)SvRV (invoke);
		1723	len = av_len (invoke_av);
		1724
		1725	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1726
		1727	if (len > 0)
		1728	{
846	av_fill (defav, items - 1);	1729	av_fill (defav, len - 1);
847	while (items--)	1730	for (i = 0; i < len; ++i)
848	av_store (defav, items, SvREFCNT_inc (ST(items)));	1731	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1732	}
849		1733
850	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
851	sv = av_pop ((AV *)SvRV (returnstk));
852	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
853	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
854	SvREFCNT_dec (sv);	1734	SvREFCNT_dec (invoke);
		1735	}
855		1736
856	transfer(aTHX_ prev, next, 0);	1737	void
		1738	_pool_2 (SV *cb)
		1739	CODE:
		1740	{
		1741	struct coro *coro = SvSTATE (coro_current);
857		1742
		1743	sv_setsv (cb, &PL_sv_undef);
		1744
		1745	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1746	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1747	croak ("\3terminate\2\n");
		1748
		1749	av_clear (GvAV (PL_defgv));
		1750	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1751	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1752
		1753	coro->prio = 0;
		1754
		1755	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1756	api_trace (coro_current, 0);
		1757
		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 1.17 by root, Wed Jul 25 14:01:46 2001 UTC vs. Revision 1.178 by root, Wed Oct 3 01:48:06 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.17 by root, Wed Jul 25 14:01:46 2001 UTC vs.
Revision 1.178 by root, Wed Oct 3 01:48:06 2007 UTC