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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.189 by root, Fri Oct 5 20:38:43 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>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
10	#endif	24	# endif
11		25	# include <limits.h>
12	#define MAY_FLUSH /* increases codesize */	26	# ifndef PAGESIZE
13		27	# define PAGESIZE pagesize
14	/* perl-related */	28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
15	#define TRANSFER_SAVE_DEFAV 0x00000001	29	static long pagesize;
16	#define TRANSFER_SAVE_DEFSV 0x00000002	30	# else
17	#define TRANSFER_SAVE_ERRSV 0x00000004	31	# define BOOT_PAGESIZE (void)0
18	/* c-related */	32	# endif
19	#define TRANSFER_SAVE_CCTXT 0x00000008
20	#ifdef CORO_LAZY_STACK
21	# define TRANSFER_LAZY_STACK 0x00000010
22	#else	33	#else
23	# 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
24	#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
25		74
26	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV\|TRANSFER_SAVE_DEFSV \	75	/* 5.8.7 */
27	\|TRANSFER_SAVE_ERRSV\|TRANSFER_SAVE_CCTXT)	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
28		79
29	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
30	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
31		83
32	/* The next macro should delcare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
33	* to the current C stack pointer. It's property is that it changes with each call	85	# define CORO_STACKGUARD 0
34	* 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
35	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
36		97
37	#define labs(l) ((l) >= 0 ? (l) : -(l))	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
38		99
39	/* 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	static GV stdoutgv; / STDOUT /
		139
		140	/* async_pool helper stuff */
		141	static SV *sv_pool_rss;
		142	static SV *sv_pool_size;
		143	static AV *av_async_pool;
		144
		145	static struct coro_cctx *cctx_first;
		146	static int cctx_count, cctx_idle;
		147
		148	enum {
		149	CC_MAPPED = 0x01,
		150	CC_NOREUSE = 0x02, /* throw this away after tracing */
		151	CC_TRACE = 0x04,
		152	CC_TRACE_SUB = 0x08, /* trace sub calls */
		153	CC_TRACE_LINE = 0x10, /* trace each statement */
		154	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		155	};
		156
		157	/* this is a structure representing a c-level coroutine */
40	typedef struct {	158	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	159	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		160
		161	/* the stack */
		162	void *sptr;
		163	size_t ssize;
		164
		165	/* cpu state */
		166	void idle_sp; / sp of top-level transfer/schedule/cede call */
		167	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		168	JMPENV *top_env;
45	coro_context cctx;	169	coro_context cctx;
46		170
47	void *sptr;	171	#if CORO_USE_VALGRIND
48	long ssize; /* positive == mmap, otherwise malloc */	172	int valgrind_id;
49	} coro_stack;	173	#endif
		174	unsigned char flags;
		175	} coro_cctx;
50		176
51	static coro_stack main_stack = { 1, 0, 0 };	177	enum {
		178	CF_RUNNING = 0x0001, /* coroutine is running */
		179	CF_READY = 0x0002, /* coroutine is ready */
		180	CF_NEW = 0x0004, /* has never been switched to */
		181	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		182	};
52		183
		184	/* this is a structure representing a perl-level coroutine */
53	struct coro {	185	struct coro {
54	/* the optional C context */	186	/* the c coroutine allocated to this perl coroutine, if any */
55	coro_stack *stack;	187	coro_cctx *cctx;
56	void *cursp;
57	int gencnt;
58
59	/* optionally saved, might be zero */
60	AV *defav;
61	SV *defsv;
62	SV *errsv;
63
64	/* saved global state not related to stacks */
65	U8 dowarn;
66
67	/* the stacks and related info (callchain etc..) */
68	PERL_SI *curstackinfo;
69	AV *curstack;
70	AV *mainstack;
71	SV **stack_sp;
72	OP *op;
73	SV **curpad;
74	SV **stack_base;
75	SV **stack_max;
76	SV **tmps_stack;
77	I32 tmps_floor;
78	I32 tmps_ix;
79	I32 tmps_max;
80	I32 *markstack;
81	I32 *markstack_ptr;
82	I32 *markstack_max;
83	I32 *scopestack;
84	I32 scopestack_ix;
85	I32 scopestack_max;
86	ANY *savestack;
87	I32 savestack_ix;
88	I32 savestack_max;
89	OP **retstack;
90	I32 retstack_ix;
91	I32 retstack_max;
92	COP *curcop;
93	JMPENV start_env;
94	JMPENV *top_env;
95		188
96	/* data associated with this coroutine (initial args) */	189	/* data associated with this coroutine (initial args) */
97	AV *args;	190	AV *args;
		191	int refcnt;
		192	int flags; /* CF_ flags */
		193
		194	/* optionally saved, might be zero */
		195	AV defav; / @_ */
		196	SV defsv; / $_ */
		197	SV errsv; / $@ */
		198	SV deffh; / default filehandle */
		199	SV irssv; / $/ */
		200	SV irssv_sv; / real $/ cache */
		201
		202	#define VAR(name,type) type name;
		203	# include "state.h"
		204	#undef VAR
		205
		206	/* statistics */
		207	int usecount; /* number of transfers to this coro */
		208
		209	/* coro process data */
		210	int prio;
		211	//SV *throw;
		212
		213	/* async_pool */
		214	SV *saved_deffh;
		215
		216	/* linked list */
		217	struct coro next, prev;
		218	HV hv; / the perl hash associated with this coro, if any */
98	};	219	};
99		220
100	typedef struct coro *Coro__State;	221	typedef struct coro *Coro__State;
101	typedef struct coro *Coro__State_or_hashref;	222	typedef struct coro *Coro__State_or_hashref;
102		223
103	static AV main_mainstack; / used to differentiate between $main and others */	224	/ Coro ******************************************************************/
104	static HV *coro_state_stash;
105	static SV *ucoro_state_sv;
106	static U32 ucoro_state_hash;
107	static HV *padlist_cache;
108		225
109	/* mostly copied from op.c:cv_clone2 */	226	#define PRIO_MAX 3
110	STATIC AV *	227	#define PRIO_HIGH 1
111	clone_padlist (AV *protopadlist)	228	#define PRIO_NORMAL 0
		229	#define PRIO_LOW -1
		230	#define PRIO_IDLE -3
		231	#define PRIO_MIN -4
		232
		233	/* for Coro.pm */
		234	static SV *coro_current;
		235	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		236	static int coro_nready;
		237	static struct coro *coro_first;
		238
		239	/ lowlevel stuff ********************************************************/
		240
		241	static AV *
		242	coro_clone_padlist (pTHX_ CV *cv)
112	{	243	{
113	AV *av;	244	AV *padlist = CvPADLIST (cv);
114	I32 ix;
115	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
116	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV newpadlist, newpad_name, *newpad;	245	AV newpadlist, newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131		246
132	newpadlist = newAV ();	247	newpadlist = newAV ();
133	AvREAL_off (newpadlist);	248	AvREAL_off (newpadlist);
134	av_store (newpadlist, 0, (SV *) newpad_name);	249	#if PERL_VERSION_ATLEAST (5,9,0)
		250	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		251	#else
		252	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		253	#endif
		254	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		255	--AvFILLp (padlist);
		256
		257	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
135	av_store (newpadlist, 1, (SV *) newpad);	258	av_store (newpadlist, 1, (SV *)newpad);
136		259
137	av = newAV (); /* will be @_ */	260	return newpadlist;
138	av_extend (av, 0);	261	}
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141		262
142	for (ix = fpad; ix > 0; ix--)	263	static void
		264	free_padlist (pTHX_ AV *padlist)
		265	{
		266	/* may be during global destruction */
		267	if (SvREFCNT (padlist))
143	{	268	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	269	I32 i = AvFILLp (padlist);
145	if (namesv && namesv != &PL_sv_undef)	270	while (i >= 0)
146	{	271	{
147	char name = SvPVX (namesv); / XXX */	272	SV **svp = av_fetch (padlist, i--, FALSE);
148	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	273	if (svp)
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}	274	{
152	else
153	{ /* our own lexical */
154	SV *sv;	275	SV *sv;
155	if (*name == '&')	276	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
156	sv = SvREFCNT_inc (ppad[ix]);	277	SvREFCNT_dec (sv);
157	else if (*name == '@')	278
158	sv = (SV *) newAV ();	279	SvREFCNT_dec (*svp);
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}	280	}
167	}	281	}
168	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
169	{
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}
179		282
180	#if 0 /* return -ENOTUNDERSTOOD */
181	/* Now that vars are all in place, clone nested closures. */
182
183	for (ix = fpad; ix > 0; ix--) {
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185	if (namesv
186	&& namesv != &PL_sv_undef
187	&& !(SvFLAGS(namesv) & SVf_FAKE)
188	&& *SvPVX(namesv) == '&'
189	&& CvCLONE(ppad[ix]))
190	{
191	CV kid = cv_clone((CV)ppad[ix]);
192	SvREFCNT_dec(ppad[ix]);
193	CvCLONE_on(kid);
194	SvPADMY_on(kid);
195	npad[ix] = (SV*)kid;
196	}
197	}
198	#endif
199
200	return newpadlist;
201	}
202
203	#ifdef MAY_FLUSH
204	STATIC AV *
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV sv = svp ? svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218
219	SvREFCNT_dec((SV*)padlist);	283	SvREFCNT_dec ((SV*)padlist);
220	}	284	}
221	}	285	}
222	#endif	286
		287	static int
		288	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		289	{
		290	AV *padlist;
		291	AV av = (AV )mg->mg_obj;
		292
		293	/* casting is fun. */
		294	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		295	free_padlist (aTHX_ padlist);
		296
		297	SvREFCNT_dec (av);
		298
		299	return 0;
		300	}
		301
		302	#define PERL_MAGIC_coro PERL_MAGIC_ext
		303
		304	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		305
		306	#define CORO_MAGIC(cv) \
		307	SvMAGIC (cv) \
		308	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		309	? SvMAGIC (cv) \
		310	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		311	: 0
		312
		313	static struct coro *
		314	SvSTATE_ (pTHX_ SV *coro)
		315	{
		316	HV *stash;
		317	MAGIC *mg;
		318
		319	if (SvROK (coro))
		320	coro = SvRV (coro);
		321
		322	if (SvTYPE (coro) != SVt_PVHV)
		323	croak ("Coro::State object required");
		324
		325	stash = SvSTASH (coro);
		326	if (stash != coro_stash && stash != coro_state_stash)
		327	{
		328	/* very slow, but rare, check */
		329	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		330	croak ("Coro::State object required");
		331	}
		332
		333	mg = CORO_MAGIC (coro);
		334	return (struct coro *)mg->mg_ptr;
		335	}
		336
		337	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
223		338
224	/* the next two functions merely cache the padlists */	339	/* the next two functions merely cache the padlists */
225	STATIC void	340	static void
226	get_padlist (CV *cv)	341	get_padlist (pTHX_ CV *cv)
227	{	342	{
228	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	343	MAGIC *mg = CORO_MAGIC (cv);
		344	AV *av;
229		345
230	if (he && AvFILLp ((AV )he) >= 0)	346	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
231	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	347	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232	else	348	else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234	}
235
236	STATIC void
237	put_padlist (CV *cv)
238	{
239	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
240
241	if (SvTYPE (*he) != SVt_PVAV)
242	{	349	{
		350	#if CORO_PREFER_PERL_FUNCTIONS
		351	/* this is probably cleaner, but also slower? */
		352	CV *cp = Perl_cv_clone (cv);
		353	CvPADLIST (cv) = CvPADLIST (cp);
		354	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (*he);	355	SvREFCNT_dec (cp);
244	he = (SV )newAV ();	356	#else
		357	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		358	#endif
245	}	359	}
246
247	av_push ((AV )he, (SV *)CvPADLIST (cv));
248	}	360	}
249		361
250	#ifdef MAY_FLUSH	362	static void
251	STATIC void	363	put_padlist (pTHX_ CV *cv)
252	flush_padlist_cache ()
253	{	364	{
254	HV *hv = padlist_cache;	365	MAGIC *mg = CORO_MAGIC (cv);
255	padlist_cache = newHV ();	366	AV *av;
256		367
257	if (hv_iterinit (hv))	368	if (!mg)
258	{
259	HE *he;
260	AV *padlist;
261
262	while (!!(he = hv_iternext (hv)))
263	{
264	AV av = (AV )HeVAL(he);
265
266	/* casting is fun. */
267	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
268	free_padlist (padlist);
269	}
270	}	369	{
		370	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		371	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		372	mg->mg_virtual = &vtbl_coro;
		373	mg->mg_obj = (SV *)newAV ();
		374	}
271		375
272	SvREFCNT_dec (hv);	376	av = (AV *)mg->mg_obj;
273	}
274	#endif
275		377
276	#define SB do {	378	if (AvFILLp (av) >= AvMAX (av))
277	#define SE } while (0)	379	av_extend (av, AvMAX (av) + 1);
278		380
279	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	381	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	382	}
281		383
282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	384	/ load & save, init *****************************************************/
283		385
284	static void	386	static void
285	load_state(pTHX_ Coro__State c)	387	load_perl (pTHX_ Coro__State c)
286	{	388	{
287	PL_dowarn = c->dowarn;	389	#define VAR(name,type) PL_ ## name = c->name;
		390	# include "state.h"
		391	#undef VAR
288		392
289	PL_curstackinfo = c->curstackinfo;	393	GvSV (PL_defgv) = c->defsv;
290	PL_curstack = c->curstack;	394	GvAV (PL_defgv) = c->defav;
291	PL_mainstack = c->mainstack;	395	GvSV (PL_errgv) = c->errsv;
292	PL_stack_sp = c->stack_sp;	396	GvSV (irsgv) = c->irssv_sv;
293	PL_op = c->op;
294	PL_curpad = c->curpad;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	PL_retstack = c->retstack;
311	PL_retstack_ix = c->retstack_ix;
312	PL_retstack_max = c->retstack_max;
313	PL_curcop = c->curcop;
314	PL_start_env = c->start_env;
315	PL_top_env = c->top_env;
316
317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320		397
321	{	398	{
322	dSP;	399	dSP;
323	CV *cv;	400	CV *cv;
324		401
325	/* now do the ugly restore mess */	402	/* now do the ugly restore mess */
326	while ((cv = (CV *)POPs))	403	while ((cv = (CV *)POPs))
327	{	404	{
328	AV padlist = (AV )POPs;
329
330	if (padlist)
331	{
332	put_padlist (cv); /* mark this padlist as available */	405	put_padlist (aTHX_ cv); /* mark this padlist as available */
333	CvPADLIST(cv) = padlist;	406	CvDEPTH (cv) = PTR2IV (POPs);
334	#ifdef USE_THREADS	407	CvPADLIST (cv) = (AV *)POPs;
335	/CvOWNER(cv) = (struct perl_thread )POPs;*/
336	#endif
337	}
338
339	++CvDEPTH(cv);
340	}	408	}
341		409
342	PUTBACK;	410	PUTBACK;
343	}	411	}
344	}	412	}
345		413
346	static void	414	static void
347	save_state(pTHX_ Coro__State c, int flags)	415	save_perl (pTHX_ Coro__State c)
348	{	416	{
349	{	417	{
350	dSP;	418	dSP;
351	I32 cxix = cxstack_ix;	419	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	420	PERL_CONTEXT *ccstk = cxstack;
355	/*	423	/*
356	* the worst thing you can imagine happens first - we have to save	424	* the worst thing you can imagine happens first - we have to save
357	* (and reinitialize) all cv's in the whole callchain :(	425	* (and reinitialize) all cv's in the whole callchain :(
358	*/	426	*/
359		427
360	PUSHs (Nullsv);	428	XPUSHs (Nullsv);
361	/* this loop was inspired by pp_caller */	429	/* this loop was inspired by pp_caller */
362	for (;;)	430	for (;;)
363	{	431	{
364	do	432	while (cxix >= 0)
365	{	433	{
366	PERL_CONTEXT *cx = &ccstk[cxix--];	434	PERL_CONTEXT *cx = &ccstk[cxix--];
367		435
368	if (CxTYPE(cx) == CXt_SUB)	436	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
369	{	437	{
370	CV *cv = cx->blk_sub.cv;	438	CV *cv = cx->blk_sub.cv;
		439
371	if (CvDEPTH(cv))	440	if (CvDEPTH (cv))
372	{	441	{
373	#ifdef USE_THREADS
374	/XPUSHs ((SV )CvOWNER(cv));*/
375	/CvOWNER(cv) = 0;/
376	/error must unlock this cv etc.. etc.../
377	#endif
378	EXTEND (SP, CvDEPTH(cv)*2);	442	EXTEND (SP, 3);
379
380	while (--CvDEPTH(cv))
381	{
382	/* this tells the restore code to increment CvDEPTH */
383	PUSHs (Nullsv);
384	PUSHs ((SV *)cv);
385	}
386
387	PUSHs ((SV *)CvPADLIST(cv));	443	PUSHs ((SV *)CvPADLIST (cv));
		444	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
388	PUSHs ((SV *)cv);	445	PUSHs ((SV *)cv);
389		446
390	get_padlist (cv); /* this is a monster */	447	CvDEPTH (cv) = 0;
		448	get_padlist (aTHX_ cv);
391	}	449	}
392	}	450	}
393	else if (CxTYPE(cx) == CXt_FORMAT)
394	{
395	/* I never used formats, so how should I know how these are implemented? */
396	/* my bold guess is as a simple, plain sub... */
397	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398	}
399	}	451	}
400	while (cxix >= 0);
401		452
402	if (top_si->si_type == PERLSI_MAIN)	453	if (top_si->si_type == PERLSI_MAIN)
403	break;	454	break;
404		455
405	top_si = top_si->si_prev;	456	top_si = top_si->si_prev;
406	ccstk = top_si->si_cxstack;	457	ccstk = top_si->si_cxstack;
407	cxix = top_si->si_cxix;	458	cxix = top_si->si_cxix;
408	}	459	}
409		460
410	PUTBACK;	461	PUTBACK;
411	}	462	}
412		463
413	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	464	c->defav = GvAV (PL_defgv);
414	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	465	c->defsv = DEFSV;
415	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	466	c->errsv = ERRSV;
		467	c->irssv_sv = GvSV (irsgv);
416		468
417	/* I have not the slightest idea of why av_reify is necessary */	469	#define VAR(name,type)c->name = PL_ ## name;
418	/* but if it's missing the defav contents magically get replaced sometimes */	470	# include "state.h"
419	if (c->defav)	471	#undef VAR
420	av_reify (c->defav);
421
422	c->dowarn = PL_dowarn;
423
424	c->curstackinfo = PL_curstackinfo;
425	c->curstack = PL_curstack;
426	c->mainstack = PL_mainstack;
427	c->stack_sp = PL_stack_sp;
428	c->op = PL_op;
429	c->curpad = PL_curpad;
430	c->stack_base = PL_stack_base;
431	c->stack_max = PL_stack_max;
432	c->tmps_stack = PL_tmps_stack;
433	c->tmps_floor = PL_tmps_floor;
434	c->tmps_ix = PL_tmps_ix;
435	c->tmps_max = PL_tmps_max;
436	c->markstack = PL_markstack;
437	c->markstack_ptr = PL_markstack_ptr;
438	c->markstack_max = PL_markstack_max;
439	c->scopestack = PL_scopestack;
440	c->scopestack_ix = PL_scopestack_ix;
441	c->scopestack_max = PL_scopestack_max;
442	c->savestack = PL_savestack;
443	c->savestack_ix = PL_savestack_ix;
444	c->savestack_max = PL_savestack_max;
445	c->retstack = PL_retstack;
446	c->retstack_ix = PL_retstack_ix;
447	c->retstack_max = PL_retstack_max;
448	c->curcop = PL_curcop;
449	c->start_env = PL_start_env;
450	c->top_env = PL_top_env;
451	}	472	}
452		473
453	/*	474	/*
454	* allocate various perl stacks. This is an exact copy	475	* allocate various perl stacks. This is an exact copy
455	* of perl.c:init_stacks, except that it uses less memory	476	* of perl.c:init_stacks, except that it uses less memory
456	* on the assumption that coroutines do not usually need	477	* on the (sometimes correct) assumption that coroutines do
457	* a lot of stackspace.	478	* not usually need a lot of stackspace.
458	*/	479	*/
459	STATIC void	480	#if CORO_PREFER_PERL_FUNCTIONS
		481	# define coro_init_stacks init_stacks
		482	#else
		483	static void
460	coro_init_stacks (pTHX)	484	coro_init_stacks (pTHX)
461	{	485	{
462	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	486	PL_curstackinfo = new_stackinfo(64, 6);
463	PL_curstackinfo->si_type = PERLSI_MAIN;	487	PL_curstackinfo->si_type = PERLSI_MAIN;
464	PL_curstack = PL_curstackinfo->si_stack;	488	PL_curstack = PL_curstackinfo->si_stack;
465	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
466		490
467	PL_stack_base = AvARRAY(PL_curstack);	491	PL_stack_base = AvARRAY(PL_curstack);
468	PL_stack_sp = PL_stack_base;	492	PL_stack_sp = PL_stack_base;
469	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
470		494
471	New(50,PL_tmps_stack,96,SV*);	495	New(50,PL_tmps_stack,64,SV*);
472	PL_tmps_floor = -1;	496	PL_tmps_floor = -1;
473	PL_tmps_ix = -1;	497	PL_tmps_ix = -1;
474	PL_tmps_max = 96;	498	PL_tmps_max = 64;
475		499
476	New(54,PL_markstack,16,I32);	500	New(54,PL_markstack,16,I32);
477	PL_markstack_ptr = PL_markstack;	501	PL_markstack_ptr = PL_markstack;
478	PL_markstack_max = PL_markstack + 16;	502	PL_markstack_max = PL_markstack + 16;
479		503
		504	#ifdef SET_MARK_OFFSET
480	SET_MARK_OFFSET;	505	SET_MARK_OFFSET;
		506	#endif
481		507
482	New(54,PL_scopestack,16,I32);	508	New(54,PL_scopestack,16,I32);
483	PL_scopestack_ix = 0;	509	PL_scopestack_ix = 0;
484	PL_scopestack_max = 16;	510	PL_scopestack_max = 16;
485		511
486	New(54,PL_savestack,96,ANY);	512	New(54,PL_savestack,64,ANY);
487	PL_savestack_ix = 0;	513	PL_savestack_ix = 0;
488	PL_savestack_max = 96;	514	PL_savestack_max = 64;
489		515
		516	#if !PERL_VERSION_ATLEAST (5,9,0)
490	New(54,PL_retstack,8,OP*);	517	New(54,PL_retstack,4,OP*);
491	PL_retstack_ix = 0;	518	PL_retstack_ix = 0;
492	PL_retstack_max = 8;	519	PL_retstack_max = 4;
		520	#endif
493	}	521	}
		522	#endif
494		523
495	/*	524	/*
496	* destroy the stacks, the callchain etc...	525	* destroy the stacks, the callchain etc...
497	* still there is a memleak of 128 bytes...
498	*/	526	*/
499	STATIC void	527	static void
500	destroy_stacks(pTHX)	528	coro_destroy_stacks (pTHX)
501	{	529	{
502	/* is this ugly, I ask? */
503	while (PL_scopestack_ix)
504	LEAVE;
505
506	/* sure it is, but more important: is it correct?? :/ */
507	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
508	FREETMPS;
509
510	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
511	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
512		532
513	while (PL_curstackinfo)	533	while (PL_curstackinfo)
514	{	534	{
515	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
516		536
517	{	537	if (!IN_DESTRUCT)
518	dSP;
519	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
520	PUTBACK; /* possibly superfluous */
521	}
522
523	dounwind(-1);
524
525	SvREFCNT_dec(PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
		539
526	Safefree(PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
527	Safefree(PL_curstackinfo);	541	Safefree (PL_curstackinfo);
528	PL_curstackinfo = p;	542	PL_curstackinfo = p;
529	}	543	}
530		544
531	Safefree(PL_tmps_stack);	545	Safefree (PL_tmps_stack);
532	Safefree(PL_markstack);	546	Safefree (PL_markstack);
533	Safefree(PL_scopestack);	547	Safefree (PL_scopestack);
534	Safefree(PL_savestack);	548	Safefree (PL_savestack);
		549	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree(PL_retstack);	550	Safefree (PL_retstack);
536	}
537
538	static void
539	allocate_stack (Coro__State ctx, int alloc)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548	if (alloc)
549	{
550	#ifdef HAVE_MMAP
551	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
552	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
553	if (stack->sptr == (void *)-1)
554	#endif	551	#endif
		552	}
		553
		554	static size_t
		555	coro_rss (pTHX_ struct coro *coro)
		556	{
		557	size_t rss = sizeof (*coro);
		558
		559	if (coro->mainstack)
		560	{
		561	if (coro->flags & CF_RUNNING)
555	{	562	{
556	/FIXME//D//* reasonable stack size! */	563	#define VAR(name,type)coro->name = PL_ ## name;
557	stack->ssize = -4096 * sizeof (long);	564	# include "state.h"
558	New (0, stack->sptr, 4096, long);	565	#undef VAR
559	}	566	}
560	}
561	else
562	stack->sptr = 0;
563		567
564	ctx->stack = stack;	568	rss += sizeof (coro->curstackinfo);
565	}	569	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		570	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		571	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		572	rss += coro->tmps_max * sizeof (SV *);
		573	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		574	rss += coro->scopestack_max * sizeof (I32);
		575	rss += coro->savestack_max * sizeof (ANY);
566		576
567	static void	577	#if !PERL_VERSION_ATLEAST (5,9,0)
568	deallocate_stack (Coro__State ctx)	578	rss += coro->retstack_max * sizeof (OP *);
569	{	579	#endif
570	coro_stack *stack = ctx->stack;
571
572	ctx->stack = 0;
573
574	if (stack)
575	{	580	}
576	if (!--stack->refcnt)
577	{
578	#ifdef HAVE_MMAP
579	if (stack->ssize > 0 && stack->sptr)
580	munmap (stack->sptr, stack->ssize);
581	else
582	#else
583	Safefree (stack->sptr);
584	#endif
585	Safefree (stack);
586	}
587	else if (ctx->gencnt == stack->gencnt)
588	--stack->usecnt;
589	}
590	}
591		581
		582	return rss;
		583	}
		584
		585	/ coroutine stack handling **********************************************/
		586
592	static void	587	static void
593	setup_coro (void *arg)	588	coro_setup (pTHX_ struct coro *coro)
594	{	589	{
595	/*	590	/*
596	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
597	*/	592	*/
		593	coro_init_stacks (aTHX);
		594
		595	PL_runops = RUNOPS_DEFAULT;
		596	PL_curcop = &PL_compiling;
		597	PL_in_eval = EVAL_NULL;
		598	PL_comppad = 0;
		599	PL_curpm = 0;
		600	PL_localizing = 0;
		601	PL_dirty = 0;
		602	PL_restartop = 0;
		603
		604	GvSV (PL_defgv) = NEWSV (0, 0);
		605	GvAV (PL_defgv) = coro->args; coro->args = 0;
		606	GvSV (PL_errgv) = NEWSV (0, 0);
		607	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		608	PL_rs = newSVsv (GvSV (irsgv));
		609	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		610
		611	{
		612	dSP;
		613	LOGOP myop;
		614
		615	Zero (&myop, 1, LOGOP);
		616	myop.op_next = Nullop;
		617	myop.op_flags = OPf_WANT_VOID;
		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
		622	PL_op = (OP *)&myop;
		623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		624	SPAGAIN;
		625	}
		626
		627	ENTER; /* necessary e.g. for dounwind */
		628	}
		629
		630	static void
		631	coro_destroy (pTHX_ struct coro *coro)
		632	{
		633	if (!IN_DESTRUCT)
		634	{
		635	/* restore all saved variables and stuff */
		636	LEAVE_SCOPE (0);
		637	assert (PL_tmps_floor == -1);
		638
		639	/* free all temporaries */
		640	FREETMPS;
		641	assert (PL_tmps_ix == -1);
		642
		643	/* unwind all extra stacks */
		644	POPSTACK_TO (PL_mainstack);
		645
		646	/* unwind main stack */
		647	dounwind (-1);
		648	}
		649
		650	SvREFCNT_dec (GvSV (PL_defgv));
		651	SvREFCNT_dec (GvAV (PL_defgv));
		652	SvREFCNT_dec (GvSV (PL_errgv));
		653	SvREFCNT_dec (PL_defoutgv);
		654	SvREFCNT_dec (PL_rs);
		655	SvREFCNT_dec (GvSV (irsgv));
		656
		657	SvREFCNT_dec (coro->saved_deffh);
		658	//SvREFCNT_dec (coro->throw);
		659
		660	coro_destroy_stacks (aTHX);
		661	}
		662
		663	static void
		664	free_coro_mortal (pTHX)
		665	{
		666	if (coro_mortal)
		667	{
		668	SvREFCNT_dec (coro_mortal);
		669	coro_mortal = 0;
		670	}
		671	}
		672
		673	static int
		674	runops_trace (pTHX)
		675	{
		676	COP *oldcop = 0;
		677	int oldcxix = -2;
		678	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		679	coro_cctx *cctx = coro->cctx;
		680
		681	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		682	{
		683	PERL_ASYNC_CHECK ();
		684
		685	if (cctx->flags & CC_TRACE_ALL)
		686	{
		687	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		688	{
		689	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		690	SV bot, top;
		691	AV av = newAV (); / return values */
		692	SV **cb;
		693	dSP;
		694
		695	GV *gv = CvGV (cx->blk_sub.cv);
		696	SV *fullname = sv_2mortal (newSV (0));
		697	if (isGV (gv))
		698	gv_efullname3 (fullname, gv, 0);
		699
		700	bot = PL_stack_base + cx->blk_oldsp + 1;
		701	top = cx->blk_gimme == G_ARRAY ? SP + 1
		702	: cx->blk_gimme == G_SCALAR ? bot + 1
		703	: bot;
		704
		705	while (bot < top)
		706	av_push (av, SvREFCNT_inc (*bot++));
		707
		708	PL_runops = RUNOPS_DEFAULT;
		709	ENTER;
		710	SAVETMPS;
		711	EXTEND (SP, 3);
		712	PUSHMARK (SP);
		713	PUSHs (&PL_sv_no);
		714	PUSHs (fullname);
		715	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		716	PUTBACK;
		717	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		718	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		719	SPAGAIN;
		720	FREETMPS;
		721	LEAVE;
		722	PL_runops = runops_trace;
		723	}
		724
		725	if (oldcop != PL_curcop)
		726	{
		727	oldcop = PL_curcop;
		728
		729	if (PL_curcop != &PL_compiling)
		730	{
		731	SV **cb;
		732
		733	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		734	{
		735	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		736
		737	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		738	{
		739	runops_proc_t old_runops = PL_runops;
		740	dSP;
		741	GV *gv = CvGV (cx->blk_sub.cv);
		742	SV *fullname = sv_2mortal (newSV (0));
		743
		744	if (isGV (gv))
		745	gv_efullname3 (fullname, gv, 0);
		746
		747	PL_runops = RUNOPS_DEFAULT;
		748	ENTER;
		749	SAVETMPS;
		750	EXTEND (SP, 3);
		751	PUSHMARK (SP);
		752	PUSHs (&PL_sv_yes);
		753	PUSHs (fullname);
		754	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		755	PUTBACK;
		756	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		757	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		758	SPAGAIN;
		759	FREETMPS;
		760	LEAVE;
		761	PL_runops = runops_trace;
		762	}
		763
		764	oldcxix = cxstack_ix;
		765	}
		766
		767	if (cctx->flags & CC_TRACE_LINE)
		768	{
		769	dSP;
		770
		771	PL_runops = RUNOPS_DEFAULT;
		772	ENTER;
		773	SAVETMPS;
		774	EXTEND (SP, 3);
		775	PL_runops = RUNOPS_DEFAULT;
		776	PUSHMARK (SP);
		777	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		778	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		779	PUTBACK;
		780	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		781	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		782	SPAGAIN;
		783	FREETMPS;
		784	LEAVE;
		785	PL_runops = runops_trace;
		786	}
		787	}
		788	}
		789	}
		790	}
		791
		792	TAINT_NOT;
		793	return 0;
		794	}
		795
		796	/* inject a fake call to Coro::State::_cctx_init into the execution */
		797	/* _cctx_init should be careful, as it could be called at almost any time */
		798	/* during execution of a perl program */
		799	static void NOINLINE
		800	prepare_cctx (pTHX_ coro_cctx *cctx)
		801	{
598	dSP;	802	dSP;
599	Coro__State ctx = (Coro__State)arg;	803	LOGOP myop;
600	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
601		804
602	coro_init_stacks (aTHX);	805	PL_top_env = &PL_start_env;
603	JMPENV_BOOTSTRAP;	806
		807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
		809
		810	Zero (&myop, 1, LOGOP);
		811	myop.op_next = PL_op;
		812	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		813
		814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		818	PUTBACK;
		819	PL_op = (OP *)&myop;
		820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
604	SPAGAIN;	821	SPAGAIN;
		822	}
605		823
606	/PL_curcop = 0;/	824	/*
607	SvREFCNT_dec (GvAV (PL_defgv));	825	* this is a _very_ stripped down perl interpreter ;)
608	GvAV (PL_defgv) = ctx->args;	826	*/
		827	static void
		828	coro_run (void *arg)
		829	{
		830	dTHX;
609		831
610	if (ctx->stack)	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
611	{	833	UNLOCK;
612	ctx->cursp = 0;
613		834
614	PUSHMARK(SP);	835	/* we now skip the entersub that lead to transfer() */
615	PUTBACK;	836	PL_op = PL_op->op_next;
616	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	837
617	croak ("FATAL: CCTXT coroutine returned!");	838	/* inject a fake subroutine call to cctx_init */
		839	prepare_cctx (aTHX_ (coro_cctx *)arg);
		840
		841	/* somebody or something will hit me for both perl_run and PL_restartop */
		842	PL_restartop = PL_op;
		843	perl_run (PL_curinterp);
		844
		845	/*
		846	* If perl-run returns we assume exit() was being called or the coro
		847	* fell off the end, which seems to be the only valid (non-bug)
		848	* reason for perl_run to return. We try to exit by jumping to the
		849	* bootstrap-time "top" top_env, as we cannot restore the "main"
		850	* coroutine as Coro has no such concept
		851	*/
		852	PL_top_env = main_top_env;
		853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		854	}
		855
		856	static coro_cctx *
		857	cctx_new ()
		858	{
		859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
		862
		863	++cctx_count;
		864
		865	Newz (0, cctx, 1, coro_cctx);
		866
		867	#if HAVE_MMAP
		868
		869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		870	/* mmap supposedly does allocate-on-write for us */
		871	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		872
		873	if (cctx->sptr != (void *)-1)
		874	{
		875	# if CORO_STACKGUARD
		876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		877	# endif
		878	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		879	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		880	cctx->flags \|= CC_MAPPED;
618	}	881	}
619	else	882	else
620	{	883	#endif
621	UNOP myop;
622
623	PL_op = (OP *)&myop;
624
625	Zero(&myop, 1, UNOP);
626	myop.op_next = Nullop;
627	myop.op_flags = OPf_WANT_VOID;
628
629	PUSHMARK(SP);
630	XPUSHs (sub_init);
631	/*
632	* the next line is slightly wrong, as PL_op->op_next
633	* is actually being executed so we skip the first op.
634	* that doesn't matter, though, since it is only
635	* pp_nextstate and we never return...
636	* ah yes, and I don't care anyways ;)
637	*/
638	PUTBACK;
639	PL_op = pp_entersub();
640	SPAGAIN;
641
642	ENTER; /* necessary e.g. for dounwind */
643	}	884	{
644	}	885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
645		887
646	static void	888	if (!cctx->sptr)
647	continue_coro (void *arg)	889	{
648	{	890	perror ("FATAL: unable to allocate stack for coroutine");
649	/*	891	_exit (EXIT_FAILURE);
650	* this is a _very_ stripped down perl interpreter ;)	892	}
651	*/
652	Coro__State ctx = (Coro__State)arg;
653		893
654	ctx->cursp = 0;	894	stack_start = cctx->sptr;
655	PL_op = PL_op->op_next;	895	stack_size = cctx->ssize;
656	CALLRUNOPS(aTHX);	896	}
657	/NORETURN/
658	abort ();
659	}
660		897
661	STATIC void	898	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		900
		901	return cctx;
		902	}
		903
		904	static void
		905	cctx_destroy (coro_cctx *cctx)
		906	{
		907	if (!cctx)
		908	return;
		909
		910	--cctx_count;
		911
		912	#if CORO_USE_VALGRIND
		913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		914	#endif
		915
		916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
		918	munmap (cctx->sptr, cctx->ssize);
		919	else
		920	#endif
		921	Safefree (cctx->sptr);
		922
		923	Safefree (cctx);
		924	}
		925
		926	static coro_cctx *
		927	cctx_get (pTHX)
		928	{
		929	while (cctx_first)
		930	{
		931	coro_cctx *cctx = cctx_first;
		932	cctx_first = cctx->next;
		933	--cctx_idle;
		934
		935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		936	return cctx;
		937
		938	cctx_destroy (cctx);
		939	}
		940
		941	return cctx_new ();
		942	}
		943
		944	static void
		945	cctx_put (coro_cctx *cctx)
		946	{
		947	/* free another cctx if overlimit */
		948	if (cctx_idle >= MAX_IDLE_CCTX)
		949	{
		950	coro_cctx *first = cctx_first;
		951	cctx_first = first->next;
		952	--cctx_idle;
		953
		954	cctx_destroy (first);
		955	}
		956
		957	++cctx_idle;
		958	cctx->next = cctx_first;
		959	cctx_first = cctx;
		960	}
		961
		962	/ coroutine switching ***************************************************/
		963
		964	static void NOINLINE
		965	transfer_check (pTHX_ struct coro prev, struct coro next)
		966	{
		967	if (prev != next)
		968	{
		969	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		970	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		971
		972	if (next->flags & CF_RUNNING)
		973	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		974
		975	if (next->flags & CF_DESTROYED)
		976	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		977
		978	if (PL_lex_state != LEX_NOTPARSING)
		979	croak ("Coro::State::transfer called while parsing, but this is not supported");
		980	}
		981	}
		982
		983	/* always use the TRANSFER macro */
		984	static void NOINLINE
662	transfer(pTHX_ struct coro prev, struct coro next, int flags)	985	transfer (pTHX_ struct coro prev, struct coro next)
663	{	986	{
664	dSP;
665	dSTACKLEVEL;	987	dSTACKLEVEL;
666		988
		989	/* sometimes transfer is only called to set idle_sp */
		990	if (!next)
		991	{
		992	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		993	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		994	}
667	if (prev != next)	995	else if (prev != next)
668	{	996	{
669	if (next->mainstack)	997	coro_cctx *prev__cctx;
		998
		999	if (prev->flags & CF_NEW)
670	{	1000	{
671	SAVE (prev, flags);	1001	/* create a new empty context */
672	LOAD (next);	1002	Newz (0, prev->cctx, 1, coro_cctx);
673		1003	prev->flags &= ~CF_NEW;
674	/* mark this state as in-use */	1004	prev->flags \|= CF_RUNNING;
675	next->mainstack = 0;
676	next->tmps_ix = -2;
677
678	/* stacklevel changed? if yes, grab the stack for us! */
679	if (flags & TRANSFER_SAVE_CCTXT)
680	{
681	if (!prev->stack)
682	allocate_stack (prev, 0);
683	else if (prev->cursp != stacklevel
684	&& prev->stack->usecnt > 1)
685	{
686	prev->gencnt = ++prev->stack->gencnt;
687	prev->stack->usecnt = 1;
688	}
689
690	/* has our stack been invalidated? */
691	if (next->stack && next->stack->gencnt != next->gencnt)
692	{
693	deallocate_stack (next);
694	allocate_stack (next, 1);
695	coro_create (&(next->stack->cctx),
696	continue_coro, (void *)next,
697	next->stack->sptr, labs (next->stack->ssize));
698	}
699
700	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
701	}
702
703	}	1005	}
704	else if (next->tmps_ix == -2)	1006
705	croak ("tried to transfer to running coroutine");	1007	prev->flags &= ~CF_RUNNING;
		1008	next->flags \|= CF_RUNNING;
		1009
		1010	LOCK;
		1011
		1012	if (next->flags & CF_NEW)
		1013	{
		1014	/* need to start coroutine */
		1015	next->flags &= ~CF_NEW;
		1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
		1020	}
706	else	1021	else
707	{	1022	{
708	SAVE (prev, -1); /* first get rid of the old state */	1023	/* coroutine already started */
709		1024	save_perl (aTHX_ prev);
710	if (flags & TRANSFER_SAVE_CCTXT)	1025	load_perl (aTHX_ next);
711	{
712	if (!prev->stack)
713	allocate_stack (prev, 0);
714
715	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716	{
717	setup_coro (next);
718
719	prev->stack->refcnt++;
720	prev->stack->usecnt++;
721	next->stack = prev->stack;
722	next->gencnt = prev->gencnt;
723	}
724	else
725	{
726	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),
728	setup_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));
730	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731	}
732	}
733	else
734	setup_coro (next);
735	}	1026	}
		1027
		1028	prev__cctx = prev->cctx;
		1029
		1030	/* possibly "free" the cctx */
		1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
		1032	{
		1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1035
		1036	prev->cctx = 0;
		1037
		1038	cctx_put (prev__cctx);
		1039	}
		1040
		1041	++next->usecount;
		1042
		1043	if (!next->cctx)
		1044	next->cctx = cctx_get (aTHX);
		1045
		1046	if (prev__cctx != next->cctx)
		1047	{
		1048	prev__cctx->top_env = PL_top_env;
		1049	PL_top_env = next->cctx->top_env;
		1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1051	}
		1052
		1053	free_coro_mortal (aTHX);
		1054	UNLOCK;
		1055	}
		1056	}
		1057
		1058	struct transfer_args
		1059	{
		1060	struct coro prev, next;
		1061	};
		1062
		1063	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1064	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1065
		1066	/ high level stuff ******************************************************/
		1067
		1068	static int
		1069	coro_state_destroy (pTHX_ struct coro *coro)
		1070	{
		1071	if (coro->flags & CF_DESTROYED)
		1072	return 0;
		1073
		1074	coro->flags \|= CF_DESTROYED;
		1075
		1076	if (coro->flags & CF_READY)
736	}	1077	{
		1078	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1079	/* alternative: look through all ready queues and remove the coro */
		1080	LOCK;
		1081	--coro_nready;
		1082	UNLOCK;
		1083	}
		1084	else
		1085	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
737		1086
738	next->cursp = stacklevel;	1087	if (coro->mainstack && coro->mainstack != main_mainstack)
739	}	1088	{
		1089	struct coro temp;
740		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
		1096
		1097	coro_destroy (aTHX_ coro);
		1098
		1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1100
		1101	coro->mainstack = 0;
		1102	}
		1103
		1104	cctx_destroy (coro->cctx);
		1105	SvREFCNT_dec (coro->args);
		1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
		1112	}
		1113
		1114	static int
		1115	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1116	{
		1117	struct coro coro = (struct coro )mg->mg_ptr;
		1118	mg->mg_ptr = 0;
		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
		1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
		1127
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1133	{
		1134	struct coro coro = (struct coro )mg->mg_ptr;
		1135
		1136	++coro->refcnt;
		1137
		1138	return 0;
		1139	}
		1140
		1141	static MGVTBL coro_state_vtbl = {
		1142	0, 0, 0, 0,
		1143	coro_state_free,
		1144	0,
		1145	#ifdef MGf_DUP
		1146	coro_state_dup,
		1147	#else
		1148	# define MGf_DUP 0
		1149	#endif
		1150	};
		1151
		1152	static void
		1153	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1154	{
		1155	ta->prev = SvSTATE (prev_sv);
		1156	ta->next = SvSTATE (next_sv);
		1157	TRANSFER_CHECK (*ta);
		1158	}
		1159
		1160	static void
		1161	api_transfer (SV prev_sv, SV next_sv)
		1162	{
		1163	dTHX;
		1164	struct transfer_args ta;
		1165
		1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1167	TRANSFER (ta);
		1168	}
		1169
		1170	/ Coro ******************************************************************/
		1171
		1172	static void
		1173	coro_enq (pTHX_ SV *coro_sv)
		1174	{
		1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1176	}
		1177
		1178	static SV *
		1179	coro_deq (pTHX_ int min_prio)
		1180	{
		1181	int prio = PRIO_MAX - PRIO_MIN;
		1182
		1183	min_prio -= PRIO_MIN;
		1184	if (min_prio < 0)
		1185	min_prio = 0;
		1186
		1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1188	if (AvFILLp (coro_ready [prio]) >= 0)
		1189	return av_shift (coro_ready [prio]);
		1190
		1191	return 0;
		1192	}
		1193
		1194	static int
		1195	api_ready (SV *coro_sv)
		1196	{
		1197	dTHX;
		1198	struct coro *coro;
		1199
		1200	if (SvROK (coro_sv))
		1201	coro_sv = SvRV (coro_sv);
		1202
		1203	coro = SvSTATE (coro_sv);
		1204
		1205	if (coro->flags & CF_READY)
		1206	return 0;
		1207
		1208	coro->flags \|= CF_READY;
		1209
		1210	LOCK;
		1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
		1213	UNLOCK;
		1214
		1215	return 1;
		1216	}
		1217
		1218	static int
		1219	api_is_ready (SV *coro_sv)
		1220	{
		1221	dTHX;
		1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1223	}
		1224
		1225	static void
		1226	prepare_schedule (pTHX_ struct transfer_args *ta)
		1227	{
		1228	SV prev_sv, next_sv;
		1229
		1230	for (;;)
		1231	{
		1232	LOCK;
		1233	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1234
		1235	/* nothing to schedule: call the idle handler */
		1236	if (!next_sv)
		1237	{
		1238	dSP;
		1239	UNLOCK;
		1240
		1241	ENTER;
		1242	SAVETMPS;
		1243
		1244	PUSHMARK (SP);
		1245	PUTBACK;
		1246	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1247
		1248	FREETMPS;
		1249	LEAVE;
		1250	continue;
		1251	}
		1252
		1253	ta->next = SvSTATE (next_sv);
		1254
		1255	/* cannot transfer to destroyed coros, skip and look for next */
		1256	if (ta->next->flags & CF_DESTROYED)
		1257	{
		1258	UNLOCK;
		1259	SvREFCNT_dec (next_sv);
		1260	/* coro_nready is already taken care of by destroy */
		1261	continue;
		1262	}
		1263
		1264	--coro_nready;
		1265	UNLOCK;
		1266	break;
		1267	}
		1268
		1269	/* free this only after the transfer */
		1270	prev_sv = SvRV (coro_current);
		1271	ta->prev = SvSTATE (prev_sv);
		1272	TRANSFER_CHECK (*ta);
		1273	assert (ta->next->flags & CF_READY);
		1274	ta->next->flags &= ~CF_READY;
		1275	SvRV_set (coro_current, next_sv);
		1276
		1277	LOCK;
		1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
		1280	UNLOCK;
		1281	}
		1282
		1283	static void
		1284	prepare_cede (pTHX_ struct transfer_args *ta)
		1285	{
		1286	api_ready (coro_current);
		1287	prepare_schedule (aTHX_ ta);
		1288	}
		1289
		1290	static int
		1291	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1292	{
		1293	if (coro_nready)
		1294	{
		1295	SV *prev = SvRV (coro_current);
		1296	prepare_schedule (aTHX_ ta);
		1297	api_ready (prev);
		1298	return 1;
		1299	}
		1300	else
		1301	return 0;
		1302	}
		1303
		1304	static void
		1305	api_schedule (void)
		1306	{
		1307	dTHX;
		1308	struct transfer_args ta;
		1309
		1310	prepare_schedule (aTHX_ &ta);
		1311	TRANSFER (ta);
		1312	}
		1313
		1314	static int
		1315	api_cede (void)
		1316	{
		1317	dTHX;
		1318	struct transfer_args ta;
		1319
		1320	prepare_cede (aTHX_ &ta);
		1321
		1322	if (ta.prev != ta.next)
		1323	{
		1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
		1329	}
		1330
		1331	static int
		1332	api_cede_notself (void)
		1333	{
		1334	dTHX;
		1335	struct transfer_args ta;
		1336
		1337	if (prepare_cede_notself (aTHX_ &ta))
		1338	{
		1339	TRANSFER (ta);
		1340	return 1;
		1341	}
		1342	else
		1343	return 0;
		1344	}
		1345
		1346	static void
		1347	api_trace (SV *coro_sv, int flags)
		1348	{
		1349	dTHX;
		1350	struct coro *coro = SvSTATE (coro_sv);
		1351
		1352	if (flags & CC_TRACE)
		1353	{
		1354	if (!coro->cctx)
		1355	coro->cctx = cctx_new ();
		1356	else if (!(coro->cctx->flags & CC_TRACE))
		1357	croak ("cannot enable tracing on coroutine with custom stack");
		1358
		1359	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1360	}
		1361	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1362	{
		1363	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1364
		1365	if (coro->flags & CF_RUNNING)
		1366	PL_runops = RUNOPS_DEFAULT;
		1367	else
		1368	coro->runops = RUNOPS_DEFAULT;
		1369	}
		1370	}
		1371
741	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
742		1373
743	PROTOTYPES: ENABLE	1374	PROTOTYPES: DISABLE
744		1375
745	BOOT:	1376	BOOT:
746	{ /* {} necessary for stoopid perl-5.6.x */	1377	{
747	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1378	#ifdef USE_ITHREADS
748	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1379	MUTEX_INIT (&coro_mutex);
		1380	#endif
		1381	BOOT_PAGESIZE;
		1382
		1383	irsgv = gv_fetchpv ("/" , GV_ADD, SVt_PV);
		1384	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD, SVt_PVIO);
		1385
749	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1386	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
750		1387
751	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
752	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
753	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
754	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
755
756	if (!padlist_cache)
757	padlist_cache = newHV ();
758		1392
759	main_mainstack = PL_mainstack;	1393	main_mainstack = PL_mainstack;
760	}	1394	main_top_env = PL_top_env;
761		1395
762	Coro::State	1396	while (main_top_env->je_prev)
763	_newprocess(args)	1397	main_top_env = main_top_env->je_prev;
764	SV * args	1398
765	PROTOTYPE: $	1399	coroapi.ver = CORO_API_VERSION;
		1400	coroapi.transfer = api_transfer;
		1401
		1402	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1403	}
		1404
		1405	SV *
		1406	new (char *klass, ...)
766	CODE:	1407	CODE:
767	Coro__State coro;	1408	{
		1409	struct coro *coro;
		1410	HV *hv;
		1411	int i;
768		1412
769	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
770	croak ("Coro::State::_newprocess expects an arrayref");
771
772	New (0, coro, 1, struct coro);	1413	Newz (0, coro, 1, struct coro);
		1414	coro->args = newAV ();
		1415	coro->flags = CF_NEW;
773		1416
774	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1417	if (coro_first) coro_first->prev = coro;
775	coro->mainstack = 0; /* actual work is done inside transfer */	1418	coro->next = coro_first;
776	coro->stack = 0;	1419	coro_first = coro;
777		1420
778	RETVAL = coro;	1421	coro->hv = hv = newHV ();
		1422	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1423	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1424
		1425	for (i = 1; i < items; i++)
		1426	av_push (coro->args, newSVsv (ST (i)));
		1427	}
779	OUTPUT:	1428	OUTPUT:
780	RETVAL	1429	RETVAL
781		1430
		1431	# these not obviously related functions are all rolled into the same xs
		1432	# function to increase chances that they all will call transfer with the same
		1433	# stack offset
782	void	1434	void
783	transfer(prev, next, flags = TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK)	1435	_set_stacklevel (...)
784	Coro::State_or_hashref prev	1436	ALIAS:
785	Coro::State_or_hashref next	1437	Coro::State::transfer = 1
786	int flags	1438	Coro::schedule = 2
787	PROTOTYPE: @	1439	Coro::cede = 3
		1440	Coro::cede_notself = 4
788	CODE:	1441	CODE:
789	transfer (aTHX_ prev, next, flags);	1442	{
		1443	struct transfer_args ta;
		1444
		1445	switch (ix)
		1446	{
		1447	case 0:
		1448	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1449	ta.next = 0;
		1450	break;
		1451
		1452	case 1:
		1453	if (items != 2)
		1454	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1455
		1456	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1457	break;
		1458
		1459	case 2:
		1460	prepare_schedule (aTHX_ &ta);
		1461	break;
		1462
		1463	case 3:
		1464	prepare_cede (aTHX_ &ta);
		1465	break;
		1466
		1467	case 4:
		1468	if (!prepare_cede_notself (aTHX_ &ta))
		1469	XSRETURN_EMPTY;
		1470
		1471	break;
		1472	}
		1473
		1474	BARRIER;
		1475	TRANSFER (ta);
		1476
		1477	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1478	XSRETURN_YES;
		1479	}
		1480
		1481	bool
		1482	_destroy (SV *coro_sv)
		1483	CODE:
		1484	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1485	OUTPUT:
		1486	RETVAL
790		1487
791	void	1488	void
792	DESTROY(coro)	1489	_exit (code)
793	Coro::State coro	1490	int code
794	CODE:	1491	PROTOTYPE: $
		1492	CODE:
		1493	_exit (code);
795		1494
796	if (coro->mainstack && coro->mainstack != main_mainstack)	1495	int
		1496	cctx_stacksize (int new_stacksize = 0)
		1497	CODE:
		1498	RETVAL = coro_stacksize;
		1499	if (new_stacksize)
		1500	coro_stacksize = new_stacksize;
		1501	OUTPUT:
		1502	RETVAL
		1503
		1504	int
		1505	cctx_count ()
		1506	CODE:
		1507	RETVAL = cctx_count;
		1508	OUTPUT:
		1509	RETVAL
		1510
		1511	int
		1512	cctx_idle ()
		1513	CODE:
		1514	RETVAL = cctx_idle;
		1515	OUTPUT:
		1516	RETVAL
		1517
		1518	void
		1519	list ()
		1520	PPCODE:
		1521	{
		1522	struct coro *coro;
		1523	for (coro = coro_first; coro; coro = coro->next)
		1524	if (coro->hv)
		1525	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1526	}
		1527
		1528	void
		1529	call (Coro::State coro, SV *coderef)
		1530	ALIAS:
		1531	eval = 1
		1532	CODE:
		1533	{
		1534	if (coro->mainstack)
797	{	1535	{
798	struct coro temp;	1536	struct coro temp;
		1537	Zero (&temp, 1, struct coro);
799		1538
800	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1539	if (!(coro->flags & CF_RUNNING))
801	LOAD(aTHX_ coro);	1540	{
		1541	save_perl (aTHX_ &temp);
		1542	load_perl (aTHX_ coro);
		1543	}
802		1544
803	destroy_stacks (aTHX);	1545	{
		1546	dSP;
		1547	ENTER;
		1548	SAVETMPS;
		1549	PUSHMARK (SP);
		1550	PUTBACK;
		1551	if (ix)
		1552	eval_sv (coderef, 0);
		1553	else
		1554	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1555	SPAGAIN;
		1556	FREETMPS;
		1557	LEAVE;
		1558	PUTBACK;
		1559	}
804		1560
805	LOAD((&temp)); /* this will get rid of defsv etc.. */	1561	if (!(coro->flags & CF_RUNNING))
806		1562	{
807	coro->mainstack = 0;	1563	save_perl (aTHX_ coro);
		1564	load_perl (aTHX_ &temp);
		1565	}
808	}	1566	}
		1567	}
809		1568
810	deallocate_stack (coro);	1569	SV *
811		1570	is_ready (Coro::State coro)
812	Safefree (coro);	1571	PROTOTYPE: $
		1572	ALIAS:
		1573	is_ready = CF_READY
		1574	is_running = CF_RUNNING
		1575	is_new = CF_NEW
		1576	is_destroyed = CF_DESTROYED
		1577	CODE:
		1578	RETVAL = boolSV (coro->flags & ix);
		1579	OUTPUT:
		1580	RETVAL
813		1581
814	void	1582	void
815	flush()	1583	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1584
		1585	SV *
		1586	has_stack (Coro::State coro)
		1587	PROTOTYPE: $
816	CODE:	1588	CODE:
817	#ifdef MAY_FLUSH	1589	RETVAL = boolSV (!!coro->cctx);
818	flush_padlist_cache ();	1590	OUTPUT:
819	#endif	1591	RETVAL
820		1592
		1593	int
		1594	is_traced (Coro::State coro)
		1595	PROTOTYPE: $
		1596	CODE:
		1597	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1598	OUTPUT:
		1599	RETVAL
		1600
		1601	IV
		1602	rss (Coro::State coro)
		1603	PROTOTYPE: $
		1604	ALIAS:
		1605	usecount = 1
		1606	CODE:
		1607	switch (ix)
		1608	{
		1609	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1610	case 1: RETVAL = coro->usecount; break;
		1611	}
		1612	OUTPUT:
		1613	RETVAL
		1614
		1615
821	MODULE = Coro::State PACKAGE = Coro::Cont	1616	MODULE = Coro::State PACKAGE = Coro
822		1617
823	# this is slightly dirty	1618	BOOT:
		1619	{
		1620	int i;
		1621
		1622	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1623	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1624	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1625
		1626	coro_current = get_sv ("Coro::current", FALSE);
		1627	SvREADONLY_on (coro_current);
		1628
		1629	coro_stash = gv_stashpv ("Coro", TRUE);
		1630
		1631	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1632	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1633	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1634	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1635	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1636	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1637
		1638	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1639	coro_ready[i] = newAV ();
		1640
		1641	{
		1642	SV *sv = perl_get_sv("Coro::API", 1);
		1643
		1644	coroapi.schedule = api_schedule;
		1645	coroapi.cede = api_cede;
		1646	coroapi.cede_notself = api_cede_notself;
		1647	coroapi.ready = api_ready;
		1648	coroapi.is_ready = api_is_ready;
		1649	coroapi.nready = &coro_nready;
		1650	coroapi.current = coro_current;
		1651
		1652	GCoroAPI = &coroapi;
		1653	sv_setiv (sv, (IV)&coroapi);
		1654	SvREADONLY_on (sv);
		1655	}
		1656	}
824		1657
825	void	1658	void
826	yield(...)	1659	_set_current (SV *current)
827	PROTOTYPE: @	1660	PROTOTYPE: $
		1661	CODE:
		1662	SvREFCNT_dec (SvRV (coro_current));
		1663	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1664
		1665	int
		1666	prio (Coro::State coro, int newprio = 0)
		1667	ALIAS:
		1668	nice = 1
828	CODE:	1669	CODE:
829	static SV *returnstk;	1670	{
830	SV *sv;	1671	RETVAL = coro->prio;
		1672
		1673	if (items > 1)
		1674	{
		1675	if (ix)
		1676	newprio = coro->prio - newprio;
		1677
		1678	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1679	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1680
		1681	coro->prio = newprio;
		1682	}
		1683	}
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	SV *
		1688	ready (SV *self)
		1689	PROTOTYPE: $
		1690	CODE:
		1691	RETVAL = boolSV (api_ready (self));
		1692	OUTPUT:
		1693	RETVAL
		1694
		1695	int
		1696	nready (...)
		1697	PROTOTYPE:
		1698	CODE:
		1699	RETVAL = coro_nready;
		1700	OUTPUT:
		1701	RETVAL
		1702
		1703	# for async_pool speedup
		1704	void
		1705	_pool_1 (SV *cb)
		1706	CODE:
		1707	{
		1708	struct coro *coro = SvSTATE (coro_current);
		1709	HV hv = (HV )SvRV (coro_current);
831	AV *defav = GvAV (PL_defgv);	1710	AV *defav = GvAV (PL_defgv);
832	struct coro prev, next;	1711	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1712	AV *invoke_av;
		1713	int i, len;
833		1714
834	if (!returnstk)	1715	if (!invoke)
835	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1716	croak ("\3terminate\2\n");
836		1717
837	/* set up @_ -- ugly */	1718	SvREFCNT_dec (coro->saved_deffh);
838	av_clear (defav);	1719	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1720
		1721	hv_store (hv, "desc", sizeof ("desc") - 1,
		1722	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1723
		1724	invoke_av = (AV *)SvRV (invoke);
		1725	len = av_len (invoke_av);
		1726
		1727	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1728
		1729	if (len > 0)
		1730	{
839	av_fill (defav, items - 1);	1731	av_fill (defav, len - 1);
840	while (items--)	1732	for (i = 0; i < len; ++i)
841	av_store (defav, items, SvREFCNT_inc (ST(items)));	1733	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1734	}
842		1735
843	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
844	sv = av_pop ((AV *)SvRV (returnstk));
845	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
846	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
847	SvREFCNT_dec (sv);	1736	SvREFCNT_dec (invoke);
		1737	}
848		1738
849	transfer(aTHX_ prev, next, 0);	1739	void
		1740	_pool_2 (SV *cb)
		1741	CODE:
		1742	{
		1743	struct coro *coro = SvSTATE (coro_current);
850		1744
		1745	sv_setsv (cb, &PL_sv_undef);
		1746
		1747	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1748	coro->saved_deffh = 0;
		1749
		1750	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1751	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1752	croak ("\3terminate\2\n");
		1753
		1754	av_clear (GvAV (PL_defgv));
		1755	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1756	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1757
		1758	coro->prio = 0;
		1759
		1760	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1761	api_trace (coro_current, 0);
		1762
		1763	av_push (av_async_pool, newSVsv (coro_current));
		1764	}
		1765
		1766
		1767	MODULE = Coro::State PACKAGE = Coro::AIO
		1768
		1769	SV *
		1770	_get_state ()
		1771	CODE:
		1772	{
		1773	struct io_state *data;
		1774
		1775	RETVAL = newSV (sizeof (struct io_state));
		1776	data = (struct io_state *)SvPVX (RETVAL);
		1777	SvCUR_set (RETVAL, sizeof (struct io_state));
		1778	SvPOK_only (RETVAL);
		1779
		1780	data->errorno = errno;
		1781	data->laststype = PL_laststype;
		1782	data->laststatval = PL_laststatval;
		1783	data->statcache = PL_statcache;
		1784	}
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	void
		1789	_set_state (char *data_)
		1790	PROTOTYPE: $
		1791	CODE:
		1792	{
		1793	struct io_state data = (void )data_;
		1794
		1795	errno = data->errorno;
		1796	PL_laststype = data->laststype;
		1797	PL_laststatval = data->laststatval;
		1798	PL_statcache = data->statcache;
		1799	}
		1800

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing Coro/Coro/State.xs (file contents): Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs. Revision 1.189 by root, Fri Oct 5 20:38:43 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.189 by root, Fri Oct 5 20:38:43 2007 UTC