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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.35 by root, Mon Sep 24 01:36:20 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"
6		10
7	#include <signal.h>	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
8		14
9	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
10	# include <unistd.h>	16	# include <unistd.h>
11	# include <sys/mman.h>	17	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
15	# else	21	# else
16	# undef HAVE_MMAP	22	# undef HAVE_MMAP
17	# endif	23	# endif
18	# endif	24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
19	#endif	32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
20		37
21	#define MAY_FLUSH /* increases codesize and is rarely used */	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
22		44
23	#define SUB_INIT "Coro::State::initialize"	45	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	46	#define MAX_IDLE_CCTX 8
25		47
26	/* The next macro should declare a variable stacklevel that contains and approximation	48	#define PERL_VERSION_ATLEAST(a,b,c) \
27	* to the current C stack pointer. Its property is that it changes with each call	49	(PERL_REVISION > (a) \
28	* and should be unique. */	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
		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
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		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
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
30		97
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		99
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
34		109
35	#include "CoroAPI.h"	110	#include "CoroAPI.h"
36		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;
37	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
		132	static AV main_mainstack; / used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
		134	static HV coro_state_stash, coro_stash;
		135	static SV coro_mortal; / will be freed after next transfer */
38		136
39	/* this is actually not only the c stack but also c registers etc... */	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
		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	};
		183
		184	/* this is a structure representing a perl-level coroutine */
51	struct coro {	185	struct coro {
52	/* the optional C context */	186	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	187	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56
57	/* optionally saved, might be zero */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	JMPENV *top_env;
93		188
94	/* data associated with this coroutine (initial args) */	189	/* data associated with this coroutine (initial args) */
95	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 */
96	};	219	};
97		220
98	typedef struct coro *Coro__State;	221	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	222	typedef struct coro *Coro__State_or_hashref;
100		223
101	static AV main_mainstack; / used to differentiate between $main and others */	224	/ Coro ******************************************************************/
102	static HV *coro_state_stash;
103	static SV *ucoro_state_sv;
104	static U32 ucoro_state_hash;
105	static HV *padlist_cache;
106		225
107	/* mostly copied from op.c:cv_clone2 */	226	#define PRIO_MAX 3
108	STATIC AV *	227	#define PRIO_HIGH 1
109	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)
110	{	243	{
111	AV *av;	244	AV *padlist = CvPADLIST (cv);
112	I32 ix;
113	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
114	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
115	SV **pname = AvARRAY (protopad_name);
116	SV **ppad = AvARRAY (protopad);
117	I32 fname = AvFILLp (protopad_name);
118	I32 fpad = AvFILLp (protopad);
119	AV newpadlist, newpad_name, *newpad;	245	AV newpadlist, newpad;
120	SV **npad;
121
122	newpad_name = newAV ();
123	for (ix = fname; ix >= 0; ix--)
124	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126	newpad = newAV ();
127	av_fill (newpad, AvFILLp (protopad));
128	npad = AvARRAY (newpad);
129		246
130	newpadlist = newAV ();	247	newpadlist = newAV ();
131	AvREAL_off (newpadlist);	248	AvREAL_off (newpadlist);
132	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)));
133	av_store (newpadlist, 1, (SV *) newpad);	258	av_store (newpadlist, 1, (SV *)newpad);
134		259
135	av = newAV (); /* will be @_ */	260	return newpadlist;
136	av_extend (av, 0);	261	}
137	av_store (newpad, 0, (SV *) av);
138	AvFLAGS (av) = AVf_REIFY;
139		262
140	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))
141	{	268	{
142	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	269	I32 i = AvFILLp (padlist);
143	if (namesv && namesv != &PL_sv_undef)	270	while (i >= 0)
144	{	271	{
145	char name = SvPVX (namesv); / XXX */	272	SV **svp = av_fetch (padlist, i--, FALSE);
146	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	273	if (svp)
147	{ /* lexical from outside? */
148	npad[ix] = SvREFCNT_inc (ppad[ix]);
149	}	274	{
150	else
151	{ /* our own lexical */
152	SV *sv;	275	SV *sv;
153	if (*name == '&')	276	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
154	sv = SvREFCNT_inc (ppad[ix]);	277	SvREFCNT_dec (sv);
155	else if (*name == '@')	278
156	sv = (SV *) newAV ();	279	SvREFCNT_dec (*svp);
157	else if (*name == '%')
158	sv = (SV *) newHV ();
159	else
160	sv = NEWSV (0, 0);
161	if (!SvPADBUSY (sv))
162	SvPADMY_on (sv);
163	npad[ix] = sv;
164	}	280	}
165	}	281	}
166	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
167	{
168	npad[ix] = SvREFCNT_inc (ppad[ix]);
169	}
170	else
171	{
172	SV *sv = NEWSV (0, 0);
173	SvPADTMP_on (sv);
174	npad[ix] = sv;
175	}
176	}
177		282
178	#if 0 /* return -ENOTUNDERSTOOD */
179	/* Now that vars are all in place, clone nested closures. */
180
181	for (ix = fpad; ix > 0; ix--) {
182	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
183	if (namesv
184	&& namesv != &PL_sv_undef
185	&& !(SvFLAGS(namesv) & SVf_FAKE)
186	&& *SvPVX(namesv) == '&'
187	&& CvCLONE(ppad[ix]))
188	{
189	CV kid = cv_clone((CV)ppad[ix]);
190	SvREFCNT_dec(ppad[ix]);
191	CvCLONE_on(kid);
192	SvPADMY_on(kid);
193	npad[ix] = (SV*)kid;
194	}
195	}
196	#endif
197
198	return newpadlist;
199	}
200
201	#ifdef MAY_FLUSH
202	STATIC void
203	free_padlist (AV *padlist)
204	{
205	/* may be during global destruction */
206	if (SvREFCNT(padlist))
207	{
208	I32 i = AvFILLp(padlist);
209	while (i >= 0)
210	{
211	SV **svp = av_fetch(padlist, i--, FALSE);
212	SV sv = svp ? svp : Nullsv;
213	if (sv)
214	SvREFCNT_dec(sv);
215	}
216
217	SvREFCNT_dec((SV*)padlist);	283	SvREFCNT_dec ((SV*)padlist);
218	}	284	}
219	}	285	}
220	#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))
221		338
222	/* the next two functions merely cache the padlists */	339	/* the next two functions merely cache the padlists */
223	STATIC void	340	static void
224	get_padlist (CV *cv)	341	get_padlist (pTHX_ CV *cv)
225	{	342	{
226	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	343	MAGIC *mg = CORO_MAGIC (cv);
		344	AV *av;
227		345
228	if (he && AvFILLp ((AV )he) >= 0)	346	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	347	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	348	else
231	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232	}
233
234	STATIC void
235	put_padlist (CV *cv)
236	{
237	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
238
239	if (SvTYPE (*he) != SVt_PVAV)
240	{	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;
241	SvREFCNT_dec (*he);	355	SvREFCNT_dec (cp);
242	he = (SV )newAV ();	356	#else
		357	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		358	#endif
243	}	359	}
244
245	av_push ((AV )he, (SV *)CvPADLIST (cv));
246	}	360	}
247		361
248	#ifdef MAY_FLUSH	362	static void
249	STATIC void	363	put_padlist (pTHX_ CV *cv)
250	flush_padlist_cache ()
251	{	364	{
252	HV *hv = padlist_cache;	365	MAGIC *mg = CORO_MAGIC (cv);
253	padlist_cache = newHV ();	366	AV *av;
254		367
255	if (hv_iterinit (hv))	368	if (!mg)
256	{
257	HE *he;
258	AV *padlist;
259
260	while (!!(he = hv_iternext (hv)))
261	{
262	AV av = (AV )HeVAL(he);
263
264	/* casting is fun. */
265	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
266	free_padlist (padlist);
267	}
268	}	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	}
269		375
270	SvREFCNT_dec (hv);	376	av = (AV *)mg->mg_obj;
271	}
272	#endif
273		377
274	#define SB do {	378	if (AvFILLp (av) >= AvMAX (av))
275	#define SE } while (0)	379	av_extend (av, AvMAX (av) + 1);
276		380
277	#define LOAD(state) load_state(aTHX_ (state));	381	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	382	}
279		383
280	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	384	/ load & save, init *****************************************************/
281		385
282	static void	386	static void
283	load_state(pTHX_ Coro__State c)	387	load_perl (pTHX_ Coro__State c)
284	{	388	{
285	PL_dowarn = c->dowarn;	389	#define VAR(name,type) PL_ ## name = c->name;
286	PL_in_eval = c->in_eval;	390	# include "state.h"
		391	#undef VAR
287		392
288	PL_curstackinfo = c->curstackinfo;	393	GvSV (PL_defgv) = c->defsv;
289	PL_curstack = c->curstack;	394	GvAV (PL_defgv) = c->defav;
290	PL_mainstack = c->mainstack;	395	GvSV (PL_errgv) = c->errsv;
291	PL_stack_sp = c->stack_sp;	396	GvSV (irsgv) = c->irssv_sv;
292	PL_op = c->op;
293	PL_curpad = c->curpad;
294	PL_stack_base = c->stack_base;
295	PL_stack_max = c->stack_max;
296	PL_tmps_stack = c->tmps_stack;
297	PL_tmps_floor = c->tmps_floor;
298	PL_tmps_ix = c->tmps_ix;
299	PL_tmps_max = c->tmps_max;
300	PL_markstack = c->markstack;
301	PL_markstack_ptr = c->markstack_ptr;
302	PL_markstack_max = c->markstack_max;
303	PL_scopestack = c->scopestack;
304	PL_scopestack_ix = c->scopestack_ix;
305	PL_scopestack_max = c->scopestack_max;
306	PL_savestack = c->savestack;
307	PL_savestack_ix = c->savestack_ix;
308	PL_savestack_max = c->savestack_max;
309	PL_retstack = c->retstack;
310	PL_retstack_ix = c->retstack_ix;
311	PL_retstack_max = c->retstack_max;
312	PL_curcop = c->curcop;
313	PL_top_env = c->top_env;
314
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318		397
319	{	398	{
320	dSP;	399	dSP;
321	CV *cv;	400	CV *cv;
322		401
323	/* now do the ugly restore mess */	402	/* now do the ugly restore mess */
324	while ((cv = (CV *)POPs))	403	while ((cv = (CV *)POPs))
325	{	404	{
326	AV padlist = (AV )POPs;
327
328	if (padlist)
329	{
330	put_padlist (cv); /* mark this padlist as available */	405	put_padlist (aTHX_ cv); /* mark this padlist as available */
331	CvPADLIST(cv) = padlist;	406	CvDEPTH (cv) = PTR2IV (POPs);
332	#ifdef USE_THREADS	407	CvPADLIST (cv) = (AV *)POPs;
333	/CvOWNER(cv) = (struct perl_thread )POPs;*/
334	#endif
335	}
336
337	++CvDEPTH(cv);
338	}	408	}
339		409
340	PUTBACK;	410	PUTBACK;
341	}	411	}
342	}	412	}
343		413
344	static void	414	static void
345	save_state(pTHX_ Coro__State c, int flags)	415	save_perl (pTHX_ Coro__State c)
346	{	416	{
347	{	417	{
348	dSP;	418	dSP;
349	I32 cxix = cxstack_ix;	419	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	420	PERL_CONTEXT *ccstk = cxstack;
353	/*	423	/*
354	* 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
355	* (and reinitialize) all cv's in the whole callchain :(	425	* (and reinitialize) all cv's in the whole callchain :(
356	*/	426	*/
357		427
358	PUSHs (Nullsv);	428	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	429	/* this loop was inspired by pp_caller */
360	for (;;)	430	for (;;)
361	{	431	{
362	while (cxix >= 0)	432	while (cxix >= 0)
363	{	433	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	434	PERL_CONTEXT *cx = &ccstk[cxix--];
365		435
366	if (CxTYPE(cx) == CXt_SUB)	436	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
367	{	437	{
368	CV *cv = cx->blk_sub.cv;	438	CV *cv = cx->blk_sub.cv;
		439
369	if (CvDEPTH(cv))	440	if (CvDEPTH (cv))
370	{	441	{
371	#ifdef USE_THREADS
372	/XPUSHs ((SV )CvOWNER(cv));*/
373	/CvOWNER(cv) = 0;/
374	/error must unlock this cv etc.. etc.../
375	#endif
376	EXTEND (SP, CvDEPTH(cv)*2);	442	EXTEND (SP, 3);
377
378	while (--CvDEPTH(cv))
379	{
380	/* this tells the restore code to increment CvDEPTH */
381	PUSHs (Nullsv);
382	PUSHs ((SV *)cv);
383	}
384
385	PUSHs ((SV *)CvPADLIST(cv));	443	PUSHs ((SV *)CvPADLIST (cv));
		444	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
386	PUSHs ((SV *)cv);	445	PUSHs ((SV *)cv);
387		446
388	get_padlist (cv); /* this is a monster */	447	CvDEPTH (cv) = 0;
		448	get_padlist (aTHX_ cv);
389	}	449	}
390	}	450	}
391	else if (CxTYPE(cx) == CXt_FORMAT)
392	{
393	/* I never used formats, so how should I know how these are implemented? */
394	/* my bold guess is as a simple, plain sub... */
395	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396	}
397	}	451	}
398		452
399	if (top_si->si_type == PERLSI_MAIN)	453	if (top_si->si_type == PERLSI_MAIN)
400	break;	454	break;
401		455
402	top_si = top_si->si_prev;	456	top_si = top_si->si_prev;
403	ccstk = top_si->si_cxstack;	457	ccstk = top_si->si_cxstack;
404	cxix = top_si->si_cxix;	458	cxix = top_si->si_cxix;
405	}	459	}
406		460
407	PUTBACK;	461	PUTBACK;
408	}	462	}
409		463
410	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	464	c->defav = GvAV (PL_defgv);
411	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	465	c->defsv = DEFSV;
412	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	466	c->errsv = ERRSV;
		467	c->irssv_sv = GvSV (irsgv);
413		468
414	c->dowarn = PL_dowarn;	469	#define VAR(name,type)c->name = PL_ ## name;
415	c->in_eval = PL_in_eval;	470	# include "state.h"
416		471	#undef VAR
417	c->curstackinfo = PL_curstackinfo;
418	c->curstack = PL_curstack;
419	c->mainstack = PL_mainstack;
420	c->stack_sp = PL_stack_sp;
421	c->op = PL_op;
422	c->curpad = PL_curpad;
423	c->stack_base = PL_stack_base;
424	c->stack_max = PL_stack_max;
425	c->tmps_stack = PL_tmps_stack;
426	c->tmps_floor = PL_tmps_floor;
427	c->tmps_ix = PL_tmps_ix;
428	c->tmps_max = PL_tmps_max;
429	c->markstack = PL_markstack;
430	c->markstack_ptr = PL_markstack_ptr;
431	c->markstack_max = PL_markstack_max;
432	c->scopestack = PL_scopestack;
433	c->scopestack_ix = PL_scopestack_ix;
434	c->scopestack_max = PL_scopestack_max;
435	c->savestack = PL_savestack;
436	c->savestack_ix = PL_savestack_ix;
437	c->savestack_max = PL_savestack_max;
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	c->curcop = PL_curcop;
442	c->top_env = PL_top_env;
443	}	472	}
444		473
445	/*	474	/*
446	* allocate various perl stacks. This is an exact copy	475	* allocate various perl stacks. This is an exact copy
447	* of perl.c:init_stacks, except that it uses less memory	476	* of perl.c:init_stacks, except that it uses less memory
448	* on the assumption that coroutines do not usually need	477	* on the (sometimes correct) assumption that coroutines do
449	* a lot of stackspace.	478	* not usually need a lot of stackspace.
450	*/	479	*/
451	STATIC void	480	#if CORO_PREFER_PERL_FUNCTIONS
		481	# define coro_init_stacks init_stacks
		482	#else
		483	static void
452	coro_init_stacks (pTHX)	484	coro_init_stacks (pTHX)
453	{	485	{
454	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	486	PL_curstackinfo = new_stackinfo(64, 6);
455	PL_curstackinfo->si_type = PERLSI_MAIN;	487	PL_curstackinfo->si_type = PERLSI_MAIN;
456	PL_curstack = PL_curstackinfo->si_stack;	488	PL_curstack = PL_curstackinfo->si_stack;
457	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458		490
459	PL_stack_base = AvARRAY(PL_curstack);	491	PL_stack_base = AvARRAY(PL_curstack);
460	PL_stack_sp = PL_stack_base;	492	PL_stack_sp = PL_stack_base;
461	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462		494
463	New(50,PL_tmps_stack,96,SV*);	495	New(50,PL_tmps_stack,64,SV*);
464	PL_tmps_floor = -1;	496	PL_tmps_floor = -1;
465	PL_tmps_ix = -1;	497	PL_tmps_ix = -1;
466	PL_tmps_max = 96;	498	PL_tmps_max = 64;
467		499
468	New(54,PL_markstack,16,I32);	500	New(54,PL_markstack,16,I32);
469	PL_markstack_ptr = PL_markstack;	501	PL_markstack_ptr = PL_markstack;
470	PL_markstack_max = PL_markstack + 16;	502	PL_markstack_max = PL_markstack + 16;
471		503
		504	#ifdef SET_MARK_OFFSET
472	SET_MARK_OFFSET;	505	SET_MARK_OFFSET;
		506	#endif
473		507
474	New(54,PL_scopestack,16,I32);	508	New(54,PL_scopestack,16,I32);
475	PL_scopestack_ix = 0;	509	PL_scopestack_ix = 0;
476	PL_scopestack_max = 16;	510	PL_scopestack_max = 16;
477		511
478	New(54,PL_savestack,96,ANY);	512	New(54,PL_savestack,64,ANY);
479	PL_savestack_ix = 0;	513	PL_savestack_ix = 0;
480	PL_savestack_max = 96;	514	PL_savestack_max = 64;
481		515
		516	#if !PERL_VERSION_ATLEAST (5,9,0)
482	New(54,PL_retstack,8,OP*);	517	New(54,PL_retstack,4,OP*);
483	PL_retstack_ix = 0;	518	PL_retstack_ix = 0;
484	PL_retstack_max = 8;	519	PL_retstack_max = 4;
		520	#endif
485	}	521	}
		522	#endif
486		523
487	/*	524	/*
488	* destroy the stacks, the callchain etc...	525	* destroy the stacks, the callchain etc...
489	* still there is a memleak of 128 bytes...
490	*/	526	*/
491	STATIC void	527	static void
492	destroy_stacks(pTHX)	528	coro_destroy_stacks (pTHX)
493	{	529	{
494	if (!IN_DESTRUCT)
495	{
496	/* is this ugly, I ask? */
497	while (PL_scopestack_ix)
498	LEAVE;
499
500	/* sure it is, but more important: is it correct?? :/ */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;
503	}
504
505	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
507		532
508	while (PL_curstackinfo)	533	while (PL_curstackinfo)
509	{	534	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
511		536
512	{
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
519	{
520	dounwind(-1);
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		539
524	Safefree(PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	541	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	542	PL_curstackinfo = p;
527	}	543	}
528		544
529	Safefree(PL_tmps_stack);	545	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	546	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	547	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	548	Safefree (PL_savestack);
		549	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	550	Safefree (PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#ifdef HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#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)
553	{	562	{
554	/FIXME//D//* reasonable stack size! */	563	#define VAR(name,type)coro->name = PL_ ## name;
555	stack->ssize = -4096 * sizeof (long);	564	# include "state.h"
556	New (0, stack->sptr, 4096, long);	565	#undef VAR
557	}	566	}
558	}
559	else
560	stack->sptr = 0;
561		567
562	ctx->stack = stack;	568	rss += sizeof (coro->curstackinfo);
563	}	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);
564		576
565	static void	577	#if !PERL_VERSION_ATLEAST (5,9,0)
566	deallocate_stack (Coro__State ctx)	578	rss += coro->retstack_max * sizeof (OP *);
567	{	579	#endif
568	coro_stack *stack = ctx->stack;
569
570	ctx->stack = 0;
571
572	if (stack)
573	{	580	}
574	if (!--stack->refcnt)
575	{
576	#ifdef HAVE_MMAP
577	if (stack->ssize > 0 && stack->sptr)
578	munmap (stack->sptr, stack->ssize);
579	else
580	#else
581	Safefree (stack->sptr);
582	#endif
583	Safefree (stack);
584	}
585	else if (ctx->gencnt == stack->gencnt)
586	--stack->usecnt;
587	}
588	}
589		581
		582	return rss;
		583	}
		584
		585	/ coroutine stack handling **********************************************/
		586
590	static void	587	static void
591	setup_coro (void *arg)	588	coro_setup (pTHX_ struct coro *coro)
592	{	589	{
593	/*	590	/*
594	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
595	*/	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	{
596	dSP;	802	dSP;
597	Coro__State ctx = (Coro__State)arg;	803	LOGOP myop;
598	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
599		804
600	coro_init_stacks (aTHX);	805	PL_top_env = &PL_start_env;
601	/PL_curcop = 0;/
602	/PL_in_eval = PL_in_eval;/ /* inherit */
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605		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);
606	SPAGAIN;	821	SPAGAIN;
		822	}
607		823
608	if (ctx->stack)	824	/*
609	{	825	* this is a _very_ stripped down perl interpreter ;)
610	ctx->cursp = 0;	826	*/
		827	static void
		828	coro_run (void *arg)
		829	{
		830	dTHX;
611		831
612	PUSHMARK(SP);	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
613	PUTBACK;	833	UNLOCK;
614	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
615		834
616	if (SvTRUE (ERRSV))	835	/* we now skip the entersub that lead to transfer() */
617	croak (NULL);	836	PL_op = PL_op->op_next;
618	else	837
619	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;
620	}	881	}
621	else	882	else
622	{	883	#endif
623	UNOP myop;
624
625	PL_op = (OP *)&myop;
626
627	Zero(&myop, 1, UNOP);
628	myop.op_next = Nullop;
629	myop.op_flags = OPf_WANT_VOID;
630
631	PUSHMARK(SP);
632	XPUSHs (sub_init);
633	/*
634	* the next line is slightly wrong, as PL_op->op_next
635	* is actually being executed so we skip the first op.
636	* that doesn't matter, though, since it is only
637	* pp_nextstate and we never return...
638	* ah yes, and I don't care anyways ;)
639	*/
640	PUTBACK;
641	PL_op = pp_entersub();
642	SPAGAIN;
643
644	ENTER; /* necessary e.g. for dounwind */
645	}	884	{
646	}	885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
647		887
648	static void	888	if (!cctx->sptr)
649	continue_coro (void *arg)	889	{
650	{	890	perror ("FATAL: unable to allocate stack for coroutine");
651	/*	891	_exit (EXIT_FAILURE);
652	* this is a _very_ stripped down perl interpreter ;)	892	}
653	*/
654	Coro__State ctx = (Coro__State)arg;
655	JMPENV coro_start_env;
656		893
657	/* same as JMPENV_BOOTSTRAP */	894	stack_start = cctx->sptr;
658	Zero(&coro_start_env, 1, JMPENV);	895	stack_size = cctx->ssize;
659	coro_start_env.je_ret = -1;	896	}
660	coro_start_env.je_mustcatch = TRUE;
661	PL_top_env = &coro_start_env;
662		897
663	ctx->cursp = 0;	898	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
664	PL_op = PL_op->op_next;	899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
665	CALLRUNOPS(aTHX);
666		900
667	abort ();	901	return cctx;
668	}	902	}
669		903
670	STATIC void	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
671	transfer(pTHX_ struct coro prev, struct coro next, int flags)	985	transfer (pTHX_ struct coro prev, struct coro next)
672	{	986	{
673	dSTACKLEVEL;	987	dSTACKLEVEL;
674	static struct coro *xnext;
675		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	}
676	if (prev != next)	995	else if (prev != next)
677	{	996	{
678	xnext = next;	997	coro_cctx *prev__cctx;
679		998
680	if (next->mainstack)	999	if (prev->flags & CF_NEW)
681	{	1000	{
682	SAVE (prev, flags);	1001	/* create a new empty context */
683	LOAD (next);	1002	Newz (0, prev->cctx, 1, coro_cctx);
684		1003	prev->flags &= ~CF_NEW;
685	/* mark this state as in-use */	1004	prev->flags \|= CF_RUNNING;
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	/* don't add any code here */
713	}
714
715	}	1005	}
716	else if (next->tmps_ix == -2)	1006
717	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	}
718	else	1021	else
719	{	1022	{
720	SAVE (prev, -1); /* first get rid of the old state */	1023	/* coroutine already started */
721		1024	save_perl (aTHX_ prev);
722	if (flags & TRANSFER_SAVE_CCTXT)	1025	load_perl (aTHX_ next);
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726
727	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728	{
729	setup_coro (next);
730
731	prev->stack->refcnt++;
732	prev->stack->usecnt++;
733	next->stack = prev->stack;
734	next->gencnt = prev->gencnt;
735	}
736	else
737	{
738	allocate_stack (next, 1);
739	coro_create (&(next->stack->cctx),
740	setup_coro, (void *)next,
741	next->stack->sptr, labs (next->stack->ssize));
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745	}
746	else
747	setup_coro (next);
748	}	1026	}
749		1027
750	/*	1028	prev__cctx = prev->cctx;
751	* xnext is now either prev or next, depending on wether	1029
752	* we switched the c stack or not. that's why i use a global	1030	/* possibly "free" the cctx */
753	* variable, that should become thread-specific at one point.	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
754	*/	1032	{
755	xnext->cursp = stacklevel;	1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
756	}	1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
757	}
758		1035
759	static struct coro *	1036	prev->cctx = 0;
760	sv_to_coro (SV arg, const char funcname, const char *varname)	1037
761	{	1038	cctx_put (prev__cctx);
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	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;
763	{	1055	}
764	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	1056	}
765		1057
766	if (!he)	1058	struct transfer_args
767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	1059	{
		1060	struct coro prev, next;
		1061	};
768		1062
769	arg = HeVAL(he);	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)
770	}	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;
771		1083	}
772	/* must also be changed inside Coro::Cont::yield */	1084	else
773	if (SvROK(arg) && SvOBJECT(SvRV(arg))	1085	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
774	&& SvSTASH(SvRV(arg)) == coro_state_stash)
775	return (struct coro ) SvIV((SV)SvRV(arg));
776		1086
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	1087	if (coro->mainstack && coro->mainstack != main_mainstack)
778	/NORETURN/	1088	{
779	}	1089	struct coro temp;
780		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
781	static void	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
782	api_transfer(pTHX_ SV prev, SV next, int flags)	1161	api_transfer (SV prev_sv, SV next_sv)
783	{	1162	{
784	transfer(aTHX_	1163	dTHX;
785	sv_to_coro (prev, "Coro::transfer", "prev"),	1164	struct transfer_args ta;
786	sv_to_coro (next, "Coro::transfer", "next"),	1165
787	flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1167	TRANSFER (ta);
788	}	1168	}
789		1169
790	/ Coro ******************************************************************/	1170	/ Coro ******************************************************************/
791		1171
792	#define PRIO_MAX 3
793	#define PRIO_HIGH 1
794	#define PRIO_NORMAL 0
795	#define PRIO_LOW -1
796	#define PRIO_IDLE -3
797	#define PRIO_MIN -4
798
799	/* for Coro.pm */
800	static GV coro_current, coro_idle;
801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
802	static int coro_nready;
803
804	static void	1172	static void
805	coro_enq (SV *sv)	1173	coro_enq (pTHX_ SV *coro_sv)
806	{	1174	{
807	if (SvROK (sv))	1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
808	{
809	SV *hv = SvRV (sv);
810	if (SvTYPE (hv) == SVt_PVHV)
811	{
812	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815	prio = prio > PRIO_MAX ? PRIO_MAX
816	: prio < PRIO_MIN ? PRIO_MIN
817	: prio;
818
819	av_push (coro_ready [prio - PRIO_MIN], sv);
820	coro_nready++;
821
822	return;
823	}
824	}
825
826	croak ("Coro::ready tried to enqueue something that is not a coroutine");
827	}	1176	}
828		1177
829	static SV *	1178	static SV *
830	coro_deq (int min_prio)	1179	coro_deq (pTHX_ int min_prio)
831	{	1180	{
832	int prio = PRIO_MAX - PRIO_MIN;	1181	int prio = PRIO_MAX - PRIO_MIN;
833		1182
834	min_prio -= PRIO_MIN;	1183	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	1184	if (min_prio < 0)
836	min_prio = 0;	1185	min_prio = 0;
837		1186
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	1188	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready[prio]);	1189	return av_shift (coro_ready [prio]);
843	}
844		1190
845	return 0;	1191	return 0;
846	}	1192	}
847		1193
848	static void	1194	static int
849	api_ready (SV *coro)	1195	api_ready (SV *coro_sv)
850	{	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;
851	coro_enq (SvREFCNT_inc (coro));	1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
852	}	1212	++coro_nready;
		1213	UNLOCK;
853		1214
		1215	return 1;
		1216	}
		1217
854	static void	1218	static int
855	api_schedule (int cede)	1219	api_is_ready (SV *coro_sv)
856	{	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	{
857	SV prev, next;	1228	SV prev_sv, next_sv;
858		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 */
859	prev = GvSV (coro_current);	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);
860		1276
861	if (cede)	1277	LOCK;
862	coro_enq (SvREFCNT_inc (prev));	1278	free_coro_mortal (aTHX);
863		1279	coro_mortal = prev_sv;
864	next = coro_deq (PRIO_MIN);	1280	UNLOCK;
865
866	if (!next)
867	next = SvREFCNT_inc (GvSV (coro_idle));
868
869	GvSV (coro_current) = SvREFCNT_inc (next);
870	transfer (aTHX_
871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
872	sv_to_coro (next, "Coro::schedule", "next coroutine"),
873	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
874	SvREFCNT_dec (next);
875	SvREFCNT_dec (prev);
876	}	1281	}
877		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
878	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879		1373
880	PROTOTYPES: ENABLE	1374	PROTOTYPES: DISABLE
881		1375
882	BOOT:	1376	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	1377	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1378	#ifdef USE_ITHREADS
885	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
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1386	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		1387
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893	if (!padlist_cache)
894	padlist_cache = newHV ();
895		1392
896	main_mainstack = PL_mainstack;	1393	main_mainstack = PL_mainstack;
		1394	main_top_env = PL_top_env;
		1395
		1396	while (main_top_env->je_prev)
		1397	main_top_env = main_top_env->je_prev;
897		1398
898	coroapi.ver = CORO_API_VERSION;	1399	coroapi.ver = CORO_API_VERSION;
899	coroapi.transfer = api_transfer;	1400	coroapi.transfer = api_transfer;
900	}
901		1401
902	Coro::State	1402	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	1403	}
904	SV * args	1404
905	PROTOTYPE: $	1405	SV *
		1406	new (char *klass, ...)
906	CODE:	1407	CODE:
907	Coro__State coro;	1408	{
		1409	struct coro *coro;
		1410	HV *hv;
		1411	int i;
908		1412
909	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
910	croak ("Coro::State::_newprocess expects an arrayref");
911
912	New (0, coro, 1, struct coro);	1413	Newz (0, coro, 1, struct coro);
		1414	coro->args = newAV ();
		1415	coro->flags = CF_NEW;
913		1416
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1417	if (coro_first) coro_first->prev = coro;
915	coro->mainstack = 0; /* actual work is done inside transfer */	1418	coro->next = coro_first;
916	coro->stack = 0;	1419	coro_first = coro;
917		1420
918	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	}
919	OUTPUT:	1428	OUTPUT:
920	RETVAL	1429	RETVAL
921		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
922	void	1434	void
923	transfer(prev, next, flags)	1435	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1436	ALIAS:
925	Coro::State_or_hashref next	1437	Coro::State::transfer = 1
926	int flags	1438	Coro::schedule = 2
927	PROTOTYPE: @	1439	Coro::cede = 3
		1440	Coro::cede_notself = 4
928	CODE:	1441	CODE:
929	PUTBACK;	1442	{
930	transfer (aTHX_ prev, next, flags);	1443	struct transfer_args ta;
931	SPAGAIN;	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
932		1487
933	void	1488	void
934	DESTROY(coro)
935	Coro::State coro
936	CODE:
937
938	if (coro->mainstack && coro->mainstack != main_mainstack)
939	{
940	struct coro temp;
941
942	PUTBACK;
943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944	LOAD(aTHX_ coro);
945	SPAGAIN;
946
947	destroy_stacks (aTHX);
948
949	LOAD((&temp)); /* this will get rid of defsv etc.. */
950	SPAGAIN;
951
952	coro->mainstack = 0;
953	}
954
955	deallocate_stack (coro);
956
957	Safefree (coro);
958
959	void
960	flush()
961	CODE:
962	#ifdef MAY_FLUSH
963	flush_padlist_cache ();
964	#endif
965
966	void
967	_exit(code)	1489	_exit (code)
968	int code	1490	int code
969	PROTOTYPE: $	1491	PROTOTYPE: $
970	CODE:	1492	CODE:
971	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
972	_exit (code);	1493	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978		1494
979	MODULE = Coro::State PACKAGE = Coro::Cont	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
980		1503
981	# this is slightly dirty (should expose a c-level api)	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
982		1517
983	void	1518	void
984	yield(...)	1519	list ()
985	PROTOTYPE: @	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)
		1535	{
		1536	struct coro temp;
		1537	Zero (&temp, 1, struct coro);
		1538
		1539	if (!(coro->flags & CF_RUNNING))
		1540	{
		1541	save_perl (aTHX_ &temp);
		1542	load_perl (aTHX_ coro);
		1543	}
		1544
		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	}
		1560
		1561	if (!(coro->flags & CF_RUNNING))
		1562	{
		1563	save_perl (aTHX_ coro);
		1564	load_perl (aTHX_ &temp);
		1565	}
		1566	}
		1567	}
		1568
		1569	SV *
		1570	is_ready (Coro::State 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
		1581
		1582	void
		1583	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1584
		1585	SV *
		1586	has_stack (Coro::State coro)
		1587	PROTOTYPE: $
		1588	CODE:
		1589	RETVAL = boolSV (!!coro->cctx);
		1590	OUTPUT:
		1591	RETVAL
		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
986	CODE:	1606	CODE:
987	static SV *returnstk;	1607	switch (ix)
988	SV *sv;	1608	{
989	AV *defav = GvAV (PL_defgv);	1609	case 0: RETVAL = coro_rss (aTHX_ coro); break;
990	struct coro prev, next;	1610	case 1: RETVAL = coro->usecount; break;
		1611	}
		1612	OUTPUT:
		1613	RETVAL
991		1614
992	if (!returnstk)
993	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995	/* set up @_ -- ugly */
996	av_clear (defav);
997	av_fill (defav, items - 1);
998	while (items--)
999	av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002	sv = av_pop ((AV *)SvRV (returnstk));
1003	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1004	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1005	SvREFCNT_dec (sv);
1006
1007	transfer(aTHX_ prev, next, 0);
1008		1615
1009	MODULE = Coro::State PACKAGE = Coro	1616	MODULE = Coro::State PACKAGE = Coro
1010		1617
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1618	BOOT:
1014	{	1619	{
1015	int i;	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
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1629	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1630
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1631	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1632	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1633	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1634	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1635	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1636	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027		1637
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1638	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029	coro_ready[i] = newAV ();	1639	coro_ready[i] = newAV ();
1030		1640
1031	{	1641	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1642	SV *sv = perl_get_sv("Coro::API", 1);
1033		1643
1034	coroapi.schedule = api_schedule;	1644	coroapi.schedule = api_schedule;
		1645	coroapi.cede = api_cede;
		1646	coroapi.cede_notself = api_cede_notself;
1035	coroapi.ready = api_ready;	1647	coroapi.ready = api_ready;
		1648	coroapi.is_ready = api_is_ready;
1036	coroapi.nready = &coro_nready;	1649	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1650	coroapi.current = coro_current;
1038		1651
1039	GCoroAPI = &coroapi;	1652	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1653	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1654	SvREADONLY_on (sv);
1042	}	1655	}
1043	}	1656	}
1044		1657
1045	void	1658	void
1046	ready(self)	1659	_set_current (SV *current)
1047	SV * self
1048	PROTOTYPE: $	1660	PROTOTYPE: $
1049	CODE:	1661	CODE:
1050	api_ready (self);	1662	SvREFCNT_dec (SvRV (coro_current));
		1663	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1051		1664
1052	int	1665	int
		1666	prio (Coro::State coro, int newprio = 0)
		1667	ALIAS:
		1668	nice = 1
		1669	CODE:
		1670	{
		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
1053	nready(...)	1696	nready (...)
1054	PROTOTYPE:	1697	PROTOTYPE:
1055	CODE:	1698	CODE:
1056	RETVAL = coro_nready;	1699	RETVAL = coro_nready;
1057	OUTPUT:	1700	OUTPUT:
1058	RETVAL	1701	RETVAL
1059		1702
		1703	# for async_pool speedup
1060	void	1704	void
1061	schedule(...)	1705	_pool_1 (SV *cb)
1062	PROTOTYPE:
1063	ALIAS:
1064	cede = 1
1065	CODE:	1706	CODE:
1066	api_schedule (ix);	1707	{
		1708	struct coro *coro = SvSTATE (coro_current);
		1709	HV hv = (HV )SvRV (coro_current);
		1710	AV *defav = GvAV (PL_defgv);
		1711	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1712	AV *invoke_av;
		1713	int i, len;
1067		1714
		1715	if (!invoke)
		1716	croak ("\3terminate\2\n");
		1717
		1718	SvREFCNT_dec (coro->saved_deffh);
		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	{
		1731	av_fill (defav, len - 1);
		1732	for (i = 0; i < len; ++i)
		1733	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1734	}
		1735
		1736	SvREFCNT_dec (invoke);
		1737	}
		1738
		1739	void
		1740	_pool_2 (SV *cb)
		1741	CODE:
		1742	{
		1743	struct coro *coro = SvSTATE (coro_current);
		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

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Comparing Coro/Coro/State.xs (file contents): Revision 1.35 by root, Mon Sep 24 01:36:20 2001 UTC vs. Revision 1.189 by root, Fri Oct 5 20:38:43 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.35 by root, Mon Sep 24 01:36:20 2001 UTC vs.
Revision 1.189 by root, Fri Oct 5 20:38:43 2007 UTC