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Comparing Coro/Coro/State.xs (file contents):
Revision 1.36 by root, Fri Oct 5 14:20:10 2001 UTC vs.
Revision 1.191 by root, Fri Oct 5 20:47:49 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_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS 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	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
		87
		88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		89	# undef CORO_STACKGUARD
		90	#endif
		91
		92	#ifndef CORO_STACKGUARD
		93	# define CORO_STACKGUARD 0
		94	#endif
		95
		96	/* prefer perl internal functions over our own? */
		97	#ifndef CORO_PREFER_PERL_FUNCTIONS
		98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
		103	#define dSTACKLEVEL volatile char stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	104	#define STACKLEVEL ((void *)&stacklevel)
30		105
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		107
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	108	#if __GNUC__ >= 3
		109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	#else
		112	# define attribute(x)
		113	# define BARRIER
		114	#endif
		115
		116	#define NOINLINE attribute ((noinline))
34		117
35	#include "CoroAPI.h"	118	#include "CoroAPI.h"
36		119
		120	#ifdef USE_ITHREADS
		121	static perl_mutex coro_mutex;
		122	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		123	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		124	#else
		125	# define LOCK (void)0
		126	# define UNLOCK (void)0
		127	#endif
		128
		129	/* helper storage struct for Coro::AIO */
		130	struct io_state
		131	{
		132	int errorno;
		133	I32 laststype;
		134	int laststatval;
		135	Stat_t statcache;
		136	};
		137
		138	static size_t coro_stacksize = CORO_STACKSIZE;
37	static struct CoroAPI coroapi;	139	static struct CoroAPI coroapi;
		140	static AV *main_mainstack; /* used to differentiate between $main and others */
		141	static JMPENV *main_top_env;
		142	static HV *coro_state_stash, *coro_stash;
		143	static SV *coro_mortal; /* will be freed after next transfer */
38		144
39	/* this is actually not only the c stack but also c registers etc... */	145	static GV *irsgv; /* $/ */
		146	static GV *stdoutgv; /* *STDOUT */
		147
		148	/* async_pool helper stuff */
		149	static SV *sv_pool_rss;
		150	static SV *sv_pool_size;
		151	static AV *av_async_pool;
		152
		153	static struct coro_cctx *cctx_first;
		154	static int cctx_count, cctx_idle;
		155
		156	enum {
		157	CC_MAPPED = 0x01,
		158	CC_NOREUSE = 0x02, /* throw this away after tracing */
		159	CC_TRACE = 0x04,
		160	CC_TRACE_SUB = 0x08, /* trace sub calls */
		161	CC_TRACE_LINE = 0x10, /* trace each statement */
		162	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		163	};
		164
		165	/* this is a structure representing a c-level coroutine */
40	typedef struct {	166	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	167	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		168
		169	/* the stack */
		170	void *sptr;
		171	size_t ssize;
		172
		173	/* cpu state */
		174	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		175	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		176	JMPENV *top_env;
45	coro_context cctx;	177	coro_context cctx;
46		178
47	void *sptr;	179	#if CORO_USE_VALGRIND
48	long ssize; /* positive == mmap, otherwise malloc */	180	int valgrind_id;
49	} coro_stack;	181	#endif
		182	unsigned char flags;
		183	} coro_cctx;
50		184
		185	enum {
		186	CF_RUNNING = 0x0001, /* coroutine is running */
		187	CF_READY = 0x0002, /* coroutine is ready */
		188	CF_NEW = 0x0004, /* has never been switched to */
		189	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		190	};
		191
		192	/* this is a structure representing a perl-level coroutine */
51	struct coro {	193	struct coro {
52	/* the optional C context */	194	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	195	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		196
94	/* data associated with this coroutine (initial args) */	197	/* data associated with this coroutine (initial args) */
95	AV *args;	198	AV *args;
		199	int refcnt;
		200	int flags; /* CF_ flags */
		201
		202	/* optionally saved, might be zero */
		203	AV *defav; /* @_ */
		204	SV *defsv; /* $_ */
		205	SV *errsv; /* $@ */
		206	SV *deffh; /* default filehandle */
		207	SV *irssv; /* $/ */
		208	SV *irssv_sv; /* real $/ cache */
		209
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213
		214	/* statistics */
		215	int usecount; /* number of transfers to this coro */
		216
		217	/* coro process data */
		218	int prio;
		219	//SV *throw;
		220
		221	/* async_pool */
		222	SV *saved_deffh;
		223
		224	/* linked list */
		225	struct coro *next, *prev;
		226	HV *hv; /* the perl hash associated with this coro, if any */
96	};	227	};
97		228
98	typedef struct coro *Coro__State;	229	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	230	typedef struct coro *Coro__State_or_hashref;
100		231
101	static AV *main_mainstack; /* used to differentiate between $main and others */	232	/** 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		233
107	/* mostly copied from op.c:cv_clone2 */	234	#define PRIO_MAX 3
108	STATIC AV *	235	#define PRIO_HIGH 1
109	clone_padlist (AV *protopadlist)	236	#define PRIO_NORMAL 0
		237	#define PRIO_LOW -1
		238	#define PRIO_IDLE -3
		239	#define PRIO_MIN -4
		240
		241	/* for Coro.pm */
		242	static SV *coro_current;
		243	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		244	static int coro_nready;
		245	static struct coro *coro_first;
		246
		247	/** lowlevel stuff **********************************************************/
		248
		249	static AV *
		250	coro_clone_padlist (pTHX_ CV *cv)
110	{	251	{
111	AV *av;	252	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;	253	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		254
130	newpadlist = newAV ();	255	newpadlist = newAV ();
131	AvREAL_off (newpadlist);	256	AvREAL_off (newpadlist);
132	av_store (newpadlist, 0, (SV *) newpad_name);	257	#if PERL_VERSION_ATLEAST (5,9,0)
		258	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		259	#else
		260	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		261	#endif
		262	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		263	--AvFILLp (padlist);
		264
		265	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
133	av_store (newpadlist, 1, (SV *) newpad);	266	av_store (newpadlist, 1, (SV *)newpad);
134		267
135	av = newAV (); /* will be @_ */	268	return newpadlist;
136	av_extend (av, 0);	269	}
137	av_store (newpad, 0, (SV *) av);
138	AvFLAGS (av) = AVf_REIFY;
139		270
140	for (ix = fpad; ix > 0; ix--)	271	static void
		272	free_padlist (pTHX_ AV *padlist)
		273	{
		274	/* may be during global destruction */
		275	if (SvREFCNT (padlist))
141	{	276	{
142	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	277	I32 i = AvFILLp (padlist);
143	if (namesv && namesv != &PL_sv_undef)	278	while (i >= 0)
144	{	279	{
145	char *name = SvPVX (namesv); /* XXX */	280	SV **svp = av_fetch (padlist, i--, FALSE);
146	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	281	if (svp)
147	{ /* lexical from outside? */
148	npad[ix] = SvREFCNT_inc (ppad[ix]);
149	}	282	{
150	else
151	{ /* our own lexical */
152	SV *sv;	283	SV *sv;
153	if (*name == '&')	284	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
154	sv = SvREFCNT_inc (ppad[ix]);	285	SvREFCNT_dec (sv);
155	else if (*name == '@')	286
156	sv = (SV *) newAV ();	287	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	}	288	}
165	}	289	}
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		290
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);	291	SvREFCNT_dec ((SV*)padlist);
218	}	292	}
219	}	293	}
220	#endif	294
		295	static int
		296	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		297	{
		298	AV *padlist;
		299	AV *av = (AV *)mg->mg_obj;
		300
		301	/* casting is fun. */
		302	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		303	free_padlist (aTHX_ padlist);
		304
		305	SvREFCNT_dec (av);
		306
		307	return 0;
		308	}
		309
		310	#define PERL_MAGIC_coro PERL_MAGIC_ext
		311
		312	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		313
		314	#define CORO_MAGIC(cv) \
		315	SvMAGIC (cv) \
		316	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		317	? SvMAGIC (cv) \
		318	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		319	: 0
		320
		321	static struct coro *
		322	SvSTATE_ (pTHX_ SV *coro)
		323	{
		324	HV *stash;
		325	MAGIC *mg;
		326
		327	if (SvROK (coro))
		328	coro = SvRV (coro);
		329
		330	if (SvTYPE (coro) != SVt_PVHV)
		331	croak ("Coro::State object required");
		332
		333	stash = SvSTASH (coro);
		334	if (stash != coro_stash && stash != coro_state_stash)
		335	{
		336	/* very slow, but rare, check */
		337	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		338	croak ("Coro::State object required");
		339	}
		340
		341	mg = CORO_MAGIC (coro);
		342	return (struct coro *)mg->mg_ptr;
		343	}
		344
		345	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
221		346
222	/* the next two functions merely cache the padlists */	347	/* the next two functions merely cache the padlists */
223	STATIC void	348	static void
224	get_padlist (CV *cv)	349	get_padlist (pTHX_ CV *cv)
225	{	350	{
226	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	351	MAGIC *mg = CORO_MAGIC (cv);
		352	AV *av;
227		353
228	if (he && AvFILLp ((AV *)*he) >= 0)	354	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	355	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	356	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	{	357	{
		358	#if CORO_PREFER_PERL_FUNCTIONS
		359	/* this is probably cleaner, but also slower? */
		360	CV *cp = Perl_cv_clone (cv);
		361	CvPADLIST (cv) = CvPADLIST (cp);
		362	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (*he);	363	SvREFCNT_dec (cp);
242	*he = (SV *)newAV ();	364	#else
		365	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		366	#endif
243	}	367	}
244
245	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
246	}	368	}
247		369
248	#ifdef MAY_FLUSH	370	static void
249	STATIC void	371	put_padlist (pTHX_ CV *cv)
250	flush_padlist_cache ()
251	{	372	{
252	HV *hv = padlist_cache;	373	MAGIC *mg = CORO_MAGIC (cv);
253	padlist_cache = newHV ();	374	AV *av;
254		375
255	if (hv_iterinit (hv))	376	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	}	377	{
		378	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		379	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		380	mg->mg_virtual = &vtbl_coro;
		381	mg->mg_obj = (SV *)newAV ();
		382	}
269		383
270	SvREFCNT_dec (hv);	384	av = (AV *)mg->mg_obj;
271	}
272	#endif
273		385
274	#define SB do {	386	if (AvFILLp (av) >= AvMAX (av))
275	#define SE } while (0)	387	av_extend (av, AvMAX (av) + 1);
276		388
277	#define LOAD(state) load_state(aTHX_ (state));	389	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	390	}
279		391
280	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	392	/** load & save, init *******************************************************/
281		393
282	static void	394	static void
283	load_state(pTHX_ Coro__State c)	395	load_perl (pTHX_ Coro__State c)
284	{	396	{
285	PL_dowarn = c->dowarn;	397	#define VAR(name,type) PL_ ## name = c->name;
286	PL_in_eval = c->in_eval;	398	# include "state.h"
		399	#undef VAR
287		400
288	PL_curstackinfo = c->curstackinfo;	401	GvSV (PL_defgv) = c->defsv;
289	PL_curstack = c->curstack;	402	GvAV (PL_defgv) = c->defav;
290	PL_mainstack = c->mainstack;	403	GvSV (PL_errgv) = c->errsv;
291	PL_stack_sp = c->stack_sp;	404	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		405
319	{	406	{
320	dSP;	407	dSP;
321	CV *cv;	408	CV *cv;
322		409
323	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
324	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
325	{	412	{
326	AV *padlist = (AV *)POPs;
327
328	if (padlist)
329	{
330	put_padlist (cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
331	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
332	#ifdef USE_THREADS	415	CvPADLIST (cv) = (AV *)POPs;
333	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334	#endif
335	}
336
337	++CvDEPTH(cv);
338	}	416	}
339		417
340	PUTBACK;	418	PUTBACK;
341	}	419	}
342	}	420	}
343		421
344	static void	422	static void
345	save_state(pTHX_ Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
346	{	424	{
347	{	425	{
348	dSP;	426	dSP;
349	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	431	/*
354	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
356	*/	434	*/
357		435
358	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
360	for (;;)	438	for (;;)
361	{	439	{
362	while (cxix >= 0)	440	while (cxix >= 0)
363	{	441	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
365		443
366	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
367	{	445	{
368	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
369	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
370	{	449	{
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);	450	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));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
386	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
387		454
388	get_padlist (cv); /* this is a monster */	455	CvDEPTH (cv) = 0;
		456	get_padlist (aTHX_ cv);
389	}	457	}
390	}	458	}
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	}	459	}
398		460
399	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
400	break;	462	break;
401		463
402	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
403	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
404	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
405	}	467	}
406		468
407	PUTBACK;	469	PUTBACK;
408	}	470	}
409		471
410	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = GvAV (PL_defgv);
411	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = DEFSV;
412	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = ERRSV;
		475	c->irssv_sv = GvSV (irsgv);
413		476
414	c->dowarn = PL_dowarn;	477	#define VAR(name,type)c->name = PL_ ## name;
415	c->in_eval = PL_in_eval;	478	# include "state.h"
416		479	#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	}	480	}
444		481
445	/*	482	/*
446	* allocate various perl stacks. This is an exact copy	483	* allocate various perl stacks. This is an exact copy
447	* of perl.c:init_stacks, except that it uses less memory	484	* of perl.c:init_stacks, except that it uses less memory
448	* on the assumption that coroutines do not usually need	485	* on the (sometimes correct) assumption that coroutines do
449	* a lot of stackspace.	486	* not usually need a lot of stackspace.
450	*/	487	*/
451	STATIC void	488	#if CORO_PREFER_PERL_FUNCTIONS
		489	# define coro_init_stacks init_stacks
		490	#else
		491	static void
452	coro_init_stacks (pTHX)	492	coro_init_stacks (pTHX)
453	{	493	{
454	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	494	PL_curstackinfo = new_stackinfo(64, 6);
455	PL_curstackinfo->si_type = PERLSI_MAIN;	495	PL_curstackinfo->si_type = PERLSI_MAIN;
456	PL_curstack = PL_curstackinfo->si_stack;	496	PL_curstack = PL_curstackinfo->si_stack;
457	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	497	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458		498
459	PL_stack_base = AvARRAY(PL_curstack);	499	PL_stack_base = AvARRAY(PL_curstack);
460	PL_stack_sp = PL_stack_base;	500	PL_stack_sp = PL_stack_base;
461	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	501	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462		502
463	New(50,PL_tmps_stack,96,SV*);	503	New(50,PL_tmps_stack,64,SV*);
464	PL_tmps_floor = -1;	504	PL_tmps_floor = -1;
465	PL_tmps_ix = -1;	505	PL_tmps_ix = -1;
466	PL_tmps_max = 96;	506	PL_tmps_max = 64;
467		507
468	New(54,PL_markstack,16,I32);	508	New(54,PL_markstack,16,I32);
469	PL_markstack_ptr = PL_markstack;	509	PL_markstack_ptr = PL_markstack;
470	PL_markstack_max = PL_markstack + 16;	510	PL_markstack_max = PL_markstack + 16;
471		511
		512	#ifdef SET_MARK_OFFSET
472	SET_MARK_OFFSET;	513	SET_MARK_OFFSET;
		514	#endif
473		515
474	New(54,PL_scopestack,16,I32);	516	New(54,PL_scopestack,16,I32);
475	PL_scopestack_ix = 0;	517	PL_scopestack_ix = 0;
476	PL_scopestack_max = 16;	518	PL_scopestack_max = 16;
477		519
478	New(54,PL_savestack,96,ANY);	520	New(54,PL_savestack,64,ANY);
479	PL_savestack_ix = 0;	521	PL_savestack_ix = 0;
480	PL_savestack_max = 96;	522	PL_savestack_max = 64;
481		523
		524	#if !PERL_VERSION_ATLEAST (5,9,0)
482	New(54,PL_retstack,8,OP*);	525	New(54,PL_retstack,4,OP*);
483	PL_retstack_ix = 0;	526	PL_retstack_ix = 0;
484	PL_retstack_max = 8;	527	PL_retstack_max = 4;
		528	#endif
485	}	529	}
		530	#endif
486		531
487	/*	532	/*
488	* destroy the stacks, the callchain etc...	533	* destroy the stacks, the callchain etc...
489	* still there is a memleak of 128 bytes...
490	*/	534	*/
491	STATIC void	535	static void
492	destroy_stacks(pTHX)	536	coro_destroy_stacks (pTHX)
493	{	537	{
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)	538	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	539	PL_curstackinfo = PL_curstackinfo->si_next;
507		540
508	while (PL_curstackinfo)	541	while (PL_curstackinfo)
509	{	542	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	543	PERL_SI *p = PL_curstackinfo->si_prev;
511		544
512	{
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
519	{
520	dounwind(-1);
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	546	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		547
524	Safefree(PL_curstackinfo->si_cxstack);	548	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	549	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	550	PL_curstackinfo = p;
527	}	551	}
528		552
529	Safefree(PL_tmps_stack);	553	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	554	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	555	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	556	Safefree (PL_savestack);
		557	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	558	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_ANONYMOUS, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif	559	#endif
		560	}
		561
		562	static size_t
		563	coro_rss (pTHX_ struct coro *coro)
		564	{
		565	size_t rss = sizeof (*coro);
		566
		567	if (coro->mainstack)
		568	{
		569	if (coro->flags & CF_RUNNING)
553	{	570	{
554	/*FIXME*//*D*//* reasonable stack size! */	571	#define VAR(name,type)coro->name = PL_ ## name;
555	stack->ssize = -4096 * sizeof (long);	572	# include "state.h"
556	New (0, stack->sptr, 4096, long);	573	#undef VAR
557	}	574	}
558	}
559	else
560	stack->sptr = 0;
561		575
562	ctx->stack = stack;	576	rss += sizeof (coro->curstackinfo);
563	}	577	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		578	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		579	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		580	rss += coro->tmps_max * sizeof (SV *);
		581	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		582	rss += coro->scopestack_max * sizeof (I32);
		583	rss += coro->savestack_max * sizeof (ANY);
564		584
565	static void	585	#if !PERL_VERSION_ATLEAST (5,9,0)
566	deallocate_stack (Coro__State ctx)	586	rss += coro->retstack_max * sizeof (OP *);
567	{	587	#endif
568	coro_stack *stack = ctx->stack;
569
570	ctx->stack = 0;
571
572	if (stack)
573	{	588	}
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		589
		590	return rss;
		591	}
		592
		593	/** coroutine stack handling ************************************************/
		594
590	static void	595	static void
591	setup_coro (void *arg)	596	coro_setup (pTHX_ struct coro *coro)
592	{	597	{
593	/*	598	/*
594	* emulate part of the perl startup here.	599	* emulate part of the perl startup here.
595	*/	600	*/
		601	coro_init_stacks (aTHX);
		602
		603	PL_runops = RUNOPS_DEFAULT;
		604	PL_curcop = &PL_compiling;
		605	PL_in_eval = EVAL_NULL;
		606	PL_comppad = 0;
		607	PL_curpm = 0;
		608	PL_localizing = 0;
		609	PL_dirty = 0;
		610	PL_restartop = 0;
		611
		612	GvSV (PL_defgv) = newSV (0);
		613	GvAV (PL_defgv) = coro->args; coro->args = 0;
		614	GvSV (PL_errgv) = newSV (0);
		615	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		616	PL_rs = newSVsv (GvSV (irsgv));
		617	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		618
		619	{
		620	dSP;
		621	LOGOP myop;
		622
		623	Zero (&myop, 1, LOGOP);
		624	myop.op_next = Nullop;
		625	myop.op_flags = OPf_WANT_VOID;
		626
		627	PUSHMARK (SP);
		628	XPUSHs (av_shift (GvAV (PL_defgv)));
		629	PUTBACK;
		630	PL_op = (OP *)&myop;
		631	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		632	SPAGAIN;
		633	}
		634
		635	ENTER; /* necessary e.g. for dounwind */
		636	}
		637
		638	static void
		639	coro_destroy (pTHX_ struct coro *coro)
		640	{
		641	if (!IN_DESTRUCT)
		642	{
		643	/* restore all saved variables and stuff */
		644	LEAVE_SCOPE (0);
		645	assert (PL_tmps_floor == -1);
		646
		647	/* free all temporaries */
		648	FREETMPS;
		649	assert (PL_tmps_ix == -1);
		650
		651	/* unwind all extra stacks */
		652	POPSTACK_TO (PL_mainstack);
		653
		654	/* unwind main stack */
		655	dounwind (-1);
		656	}
		657
		658	SvREFCNT_dec (GvSV (PL_defgv));
		659	SvREFCNT_dec (GvAV (PL_defgv));
		660	SvREFCNT_dec (GvSV (PL_errgv));
		661	SvREFCNT_dec (PL_defoutgv);
		662	SvREFCNT_dec (PL_rs);
		663	SvREFCNT_dec (GvSV (irsgv));
		664
		665	SvREFCNT_dec (coro->saved_deffh);
		666	//SvREFCNT_dec (coro->throw);
		667
		668	coro_destroy_stacks (aTHX);
		669	}
		670
		671	static void
		672	free_coro_mortal (pTHX)
		673	{
		674	if (coro_mortal)
		675	{
		676	SvREFCNT_dec (coro_mortal);
		677	coro_mortal = 0;
		678	}
		679	}
		680
		681	static int
		682	runops_trace (pTHX)
		683	{
		684	COP *oldcop = 0;
		685	int oldcxix = -2;
		686	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		687	coro_cctx *cctx = coro->cctx;
		688
		689	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		690	{
		691	PERL_ASYNC_CHECK ();
		692
		693	if (cctx->flags & CC_TRACE_ALL)
		694	{
		695	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		696	{
		697	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		698	SV **bot, **top;
		699	AV *av = newAV (); /* return values */
		700	SV **cb;
		701	dSP;
		702
		703	GV *gv = CvGV (cx->blk_sub.cv);
		704	SV *fullname = sv_2mortal (newSV (0));
		705	if (isGV (gv))
		706	gv_efullname3 (fullname, gv, 0);
		707
		708	bot = PL_stack_base + cx->blk_oldsp + 1;
		709	top = cx->blk_gimme == G_ARRAY ? SP + 1
		710	: cx->blk_gimme == G_SCALAR ? bot + 1
		711	: bot;
		712
		713	while (bot < top)
		714	av_push (av, SvREFCNT_inc (*bot++));
		715
		716	PL_runops = RUNOPS_DEFAULT;
		717	ENTER;
		718	SAVETMPS;
		719	EXTEND (SP, 3);
		720	PUSHMARK (SP);
		721	PUSHs (&PL_sv_no);
		722	PUSHs (fullname);
		723	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		724	PUTBACK;
		725	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		726	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		727	SPAGAIN;
		728	FREETMPS;
		729	LEAVE;
		730	PL_runops = runops_trace;
		731	}
		732
		733	if (oldcop != PL_curcop)
		734	{
		735	oldcop = PL_curcop;
		736
		737	if (PL_curcop != &PL_compiling)
		738	{
		739	SV **cb;
		740
		741	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		742	{
		743	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		744
		745	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		746	{
		747	runops_proc_t old_runops = PL_runops;
		748	dSP;
		749	GV *gv = CvGV (cx->blk_sub.cv);
		750	SV *fullname = sv_2mortal (newSV (0));
		751
		752	if (isGV (gv))
		753	gv_efullname3 (fullname, gv, 0);
		754
		755	PL_runops = RUNOPS_DEFAULT;
		756	ENTER;
		757	SAVETMPS;
		758	EXTEND (SP, 3);
		759	PUSHMARK (SP);
		760	PUSHs (&PL_sv_yes);
		761	PUSHs (fullname);
		762	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		763	PUTBACK;
		764	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		765	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		766	SPAGAIN;
		767	FREETMPS;
		768	LEAVE;
		769	PL_runops = runops_trace;
		770	}
		771
		772	oldcxix = cxstack_ix;
		773	}
		774
		775	if (cctx->flags & CC_TRACE_LINE)
		776	{
		777	dSP;
		778
		779	PL_runops = RUNOPS_DEFAULT;
		780	ENTER;
		781	SAVETMPS;
		782	EXTEND (SP, 3);
		783	PL_runops = RUNOPS_DEFAULT;
		784	PUSHMARK (SP);
		785	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		786	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		787	PUTBACK;
		788	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		789	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		790	SPAGAIN;
		791	FREETMPS;
		792	LEAVE;
		793	PL_runops = runops_trace;
		794	}
		795	}
		796	}
		797	}
		798	}
		799
		800	TAINT_NOT;
		801	return 0;
		802	}
		803
		804	/* inject a fake call to Coro::State::_cctx_init into the execution */
		805	/* _cctx_init should be careful, as it could be called at almost any time */
		806	/* during execution of a perl program */
		807	static void NOINLINE
		808	prepare_cctx (pTHX_ coro_cctx *cctx)
		809	{
596	dSP;	810	dSP;
597	Coro__State ctx = (Coro__State)arg;	811	LOGOP myop;
598	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599		812
600	coro_init_stacks (aTHX);	813	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		814
		815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
		817
		818	Zero (&myop, 1, LOGOP);
		819	myop.op_next = PL_op;
		820	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		821
		822	PUSHMARK (SP);
		823	EXTEND (SP, 2);
		824	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		825	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		826	PUTBACK;
		827	PL_op = (OP *)&myop;
		828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
606	SPAGAIN;	829	SPAGAIN;
		830	}
607		831
608	if (ctx->stack)	832	/*
609	{	833	* this is a _very_ stripped down perl interpreter ;)
610	ctx->cursp = 0;	834	*/
		835	static void
		836	coro_run (void *arg)
		837	{
		838	dTHX;
611		839
612	PUSHMARK(SP);	840	/* coro_run is the alternative tail of transfer(), so unlock here. */
613	PUTBACK;	841	UNLOCK;
614	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615		842
616	if (SvTRUE (ERRSV))	843	/* we now skip the entersub that lead to transfer() */
617	croak (NULL);	844	PL_op = PL_op->op_next;
618	else	845
619	croak ("FATAL: CCTXT coroutine returned!");	846	/* inject a fake subroutine call to cctx_init */
		847	prepare_cctx (aTHX_ (coro_cctx *)arg);
		848
		849	/* somebody or something will hit me for both perl_run and PL_restartop */
		850	PL_restartop = PL_op;
		851	perl_run (PL_curinterp);
		852
		853	/*
		854	* If perl-run returns we assume exit() was being called or the coro
		855	* fell off the end, which seems to be the only valid (non-bug)
		856	* reason for perl_run to return. We try to exit by jumping to the
		857	* bootstrap-time "top" top_env, as we cannot restore the "main"
		858	* coroutine as Coro has no such concept
		859	*/
		860	PL_top_env = main_top_env;
		861	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		862	}
		863
		864	static coro_cctx *
		865	cctx_new ()
		866	{
		867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
		870
		871	++cctx_count;
		872
		873	Newz (0, cctx, 1, coro_cctx);
		874
		875	#if HAVE_MMAP
		876
		877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		878	/* mmap supposedly does allocate-on-write for us */
		879	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		880
		881	if (cctx->sptr != (void *)-1)
		882	{
		883	# if CORO_STACKGUARD
		884	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		885	# endif
		886	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		887	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		888	cctx->flags |= CC_MAPPED;
620	}	889	}
621	else	890	else
622	{	891	#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	}	892	{
646	}	893	cctx->ssize = coro_stacksize * (long)sizeof (long);
		894	New (0, cctx->sptr, coro_stacksize, long);
647		895
648	static void	896	if (!cctx->sptr)
649	continue_coro (void *arg)	897	{
650	{	898	perror ("FATAL: unable to allocate stack for coroutine");
651	/*	899	_exit (EXIT_FAILURE);
652	* this is a _very_ stripped down perl interpreter ;)	900	}
653	*/
654	Coro__State ctx = (Coro__State)arg;
655	JMPENV coro_start_env;
656		901
657	/* same as JMPENV_BOOTSTRAP */	902	stack_start = cctx->sptr;
658	Zero(&coro_start_env, 1, JMPENV);	903	stack_size = cctx->ssize;
659	coro_start_env.je_ret = -1;	904	}
660	coro_start_env.je_mustcatch = TRUE;
661	PL_top_env = &coro_start_env;
662		905
663	ctx->cursp = 0;	906	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
664	PL_op = PL_op->op_next;	907	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
665	CALLRUNOPS(aTHX);
666		908
667	abort ();	909	return cctx;
668	}	910	}
669		911
670	STATIC void	912	static void
		913	cctx_destroy (coro_cctx *cctx)
		914	{
		915	if (!cctx)
		916	return;
		917
		918	--cctx_count;
		919
		920	#if CORO_USE_VALGRIND
		921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		922	#endif
		923
		924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
		926	munmap (cctx->sptr, cctx->ssize);
		927	else
		928	#endif
		929	Safefree (cctx->sptr);
		930
		931	Safefree (cctx);
		932	}
		933
		934	static coro_cctx *
		935	cctx_get (pTHX)
		936	{
		937	while (cctx_first)
		938	{
		939	coro_cctx *cctx = cctx_first;
		940	cctx_first = cctx->next;
		941	--cctx_idle;
		942
		943	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		944	return cctx;
		945
		946	cctx_destroy (cctx);
		947	}
		948
		949	return cctx_new ();
		950	}
		951
		952	static void
		953	cctx_put (coro_cctx *cctx)
		954	{
		955	/* free another cctx if overlimit */
		956	if (cctx_idle >= MAX_IDLE_CCTX)
		957	{
		958	coro_cctx *first = cctx_first;
		959	cctx_first = first->next;
		960	--cctx_idle;
		961
		962	cctx_destroy (first);
		963	}
		964
		965	++cctx_idle;
		966	cctx->next = cctx_first;
		967	cctx_first = cctx;
		968	}
		969
		970	/** coroutine switching *****************************************************/
		971
		972	static void NOINLINE
		973	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		974	{
		975	if (prev != next)
		976	{
		977	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		978	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		979
		980	if (next->flags & CF_RUNNING)
		981	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		982
		983	if (next->flags & CF_DESTROYED)
		984	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		985
		986	if (PL_lex_state != LEX_NOTPARSING)
		987	croak ("Coro::State::transfer called while parsing, but this is not supported");
		988	}
		989	}
		990
		991	/* always use the TRANSFER macro */
		992	static void NOINLINE
671	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	993	transfer (pTHX_ struct coro *prev, struct coro *next)
672	{	994	{
673	dSTACKLEVEL;	995	dSTACKLEVEL;
674	static struct coro *xnext;
675		996
		997	/* sometimes transfer is only called to set idle_sp */
		998	if (!next)
		999	{
		1000	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1001	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1002	}
676	if (prev != next)	1003	else if (prev != next)
677	{	1004	{
678	xnext = next;	1005	coro_cctx *prev__cctx;
679		1006
680	if (next->mainstack)	1007	if (prev->flags & CF_NEW)
681	{	1008	{
682	SAVE (prev, flags);	1009	/* create a new empty context */
683	LOAD (next);	1010	Newz (0, prev->cctx, 1, coro_cctx);
684		1011	prev->flags &= ~CF_NEW;
685	/* mark this state as in-use */	1012	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	}	1013	}
716	else if (next->tmps_ix == -2)	1014
717	croak ("tried to transfer to running coroutine");	1015	prev->flags &= ~CF_RUNNING;
		1016	next->flags |= CF_RUNNING;
		1017
		1018	LOCK;
		1019
		1020	if (next->flags & CF_NEW)
		1021	{
		1022	/* need to start coroutine */
		1023	next->flags &= ~CF_NEW;
		1024	/* first get rid of the old state */
		1025	save_perl (aTHX_ prev);
		1026	/* setup coroutine call */
		1027	coro_setup (aTHX_ next);
		1028	}
718	else	1029	else
719	{	1030	{
720	SAVE (prev, -1); /* first get rid of the old state */	1031	/* coroutine already started */
721		1032	save_perl (aTHX_ prev);
722	if (flags & TRANSFER_SAVE_CCTXT)	1033	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	}	1034	}
749		1035
750	/*	1036	prev__cctx = prev->cctx;
751	* xnext is now either prev or next, depending on wether	1037
752	* we switched the c stack or not. that's why i use a global	1038	/* possibly "free" the cctx */
753	* variable, that should become thread-specific at one point.	1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
754	*/	1040	{
755	xnext->cursp = stacklevel;	1041	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
756	}	1042	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
757	}
758		1043
759	static struct coro *	1044	prev->cctx = 0;
760	sv_to_coro (SV *arg, const char *funcname, const char *varname)	1045
761	{	1046	cctx_put (prev__cctx);
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	1047	}
		1048
		1049	++next->usecount;
		1050
		1051	if (!next->cctx)
		1052	next->cctx = cctx_get (aTHX);
		1053
		1054	if (prev__cctx != next->cctx)
		1055	{
		1056	prev__cctx->top_env = PL_top_env;
		1057	PL_top_env = next->cctx->top_env;
		1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1059	}
		1060
		1061	free_coro_mortal (aTHX);
		1062	UNLOCK;
763	{	1063	}
764	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	1064	}
765		1065
766	if (!he)	1066	struct transfer_args
767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	1067	{
		1068	struct coro *prev, *next;
		1069	};
768		1070
769	arg = HeVAL(he);	1071	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1072	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1073
		1074	/** high level stuff ********************************************************/
		1075
		1076	static int
		1077	coro_state_destroy (pTHX_ struct coro *coro)
		1078	{
		1079	if (coro->flags & CF_DESTROYED)
		1080	return 0;
		1081
		1082	coro->flags |= CF_DESTROYED;
		1083
		1084	if (coro->flags & CF_READY)
770	}	1085	{
		1086	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1087	/* alternative: look through all ready queues and remove the coro */
		1088	LOCK;
		1089	--coro_nready;
		1090	UNLOCK;
771		1091	}
772	/* must also be changed inside Coro::Cont::yield */	1092	else
773	if (SvROK(arg) && SvOBJECT(SvRV(arg))	1093	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		1094
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	1095	if (coro->mainstack && coro->mainstack != main_mainstack)
778	/*NORETURN*/	1096	{
779	}	1097	struct coro temp;
780		1098
		1099	if (coro->flags & CF_RUNNING)
		1100	croak ("FATAL: tried to destroy currently running coroutine");
		1101
		1102	save_perl (aTHX_ &temp);
		1103	load_perl (aTHX_ coro);
		1104
		1105	coro_destroy (aTHX_ coro);
		1106
		1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1108
		1109	coro->mainstack = 0;
		1110	}
		1111
		1112	cctx_destroy (coro->cctx);
		1113	SvREFCNT_dec (coro->args);
		1114
		1115	if (coro->next) coro->next->prev = coro->prev;
		1116	if (coro->prev) coro->prev->next = coro->next;
		1117	if (coro == coro_first) coro_first = coro->next;
		1118
		1119	return 1;
		1120	}
		1121
781	static void	1122	static int
		1123	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1124	{
		1125	struct coro *coro = (struct coro *)mg->mg_ptr;
		1126	mg->mg_ptr = 0;
		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
		1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
		1135
		1136	return 0;
		1137	}
		1138
		1139	static int
		1140	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1141	{
		1142	struct coro *coro = (struct coro *)mg->mg_ptr;
		1143
		1144	++coro->refcnt;
		1145
		1146	return 0;
		1147	}
		1148
		1149	static MGVTBL coro_state_vtbl = {
		1150	0, 0, 0, 0,
		1151	coro_state_free,
		1152	0,
		1153	#ifdef MGf_DUP
		1154	coro_state_dup,
		1155	#else
		1156	# define MGf_DUP 0
		1157	#endif
		1158	};
		1159
		1160	static void
		1161	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1162	{
		1163	ta->prev = SvSTATE (prev_sv);
		1164	ta->next = SvSTATE (next_sv);
		1165	TRANSFER_CHECK (*ta);
		1166	}
		1167
		1168	static void
782	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1169	api_transfer (SV *prev_sv, SV *next_sv)
783	{	1170	{
784	transfer(aTHX_	1171	dTHX;
785	sv_to_coro (prev, "Coro::transfer", "prev"),	1172	struct transfer_args ta;
786	sv_to_coro (next, "Coro::transfer", "next"),	1173
787	flags);	1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1175	TRANSFER (ta);
788	}	1176	}
789		1177
790	/** Coro ********************************************************************/	1178	/** Coro ********************************************************************/
791		1179
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	1180	static void
805	coro_enq (SV *sv)	1181	coro_enq (pTHX_ SV *coro_sv)
806	{	1182	{
807	if (SvROK (sv))	1183	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	}	1184	}
828		1185
829	static SV *	1186	static SV *
830	coro_deq (int min_prio)	1187	coro_deq (pTHX_ int min_prio)
831	{	1188	{
832	int prio = PRIO_MAX - PRIO_MIN;	1189	int prio = PRIO_MAX - PRIO_MIN;
833		1190
834	min_prio -= PRIO_MIN;	1191	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	1192	if (min_prio < 0)
836	min_prio = 0;	1193	min_prio = 0;
837		1194
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready[prio]);	1197	return av_shift (coro_ready [prio]);
843	}
844		1198
845	return 0;	1199	return 0;
846	}	1200	}
847		1201
848	static void	1202	static int
849	api_ready (SV *coro)	1203	api_ready (SV *coro_sv)
850	{	1204	{
		1205	dTHX;
		1206	struct coro *coro;
		1207
		1208	if (SvROK (coro_sv))
		1209	coro_sv = SvRV (coro_sv);
		1210
		1211	coro = SvSTATE (coro_sv);
		1212
		1213	if (coro->flags & CF_READY)
		1214	return 0;
		1215
		1216	coro->flags |= CF_READY;
		1217
		1218	LOCK;
851	coro_enq (SvREFCNT_inc (coro));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
852	}	1220	++coro_nready;
		1221	UNLOCK;
853		1222
		1223	return 1;
		1224	}
		1225
854	static void	1226	static int
855	api_schedule (int cede)	1227	api_is_ready (SV *coro_sv)
856	{	1228	{
		1229	dTHX;
		1230	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1231	}
		1232
		1233	static void
		1234	prepare_schedule (pTHX_ struct transfer_args *ta)
		1235	{
857	SV *prev, *next;	1236	SV *prev_sv, *next_sv;
858		1237
		1238	for (;;)
		1239	{
		1240	LOCK;
		1241	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1242
		1243	/* nothing to schedule: call the idle handler */
		1244	if (!next_sv)
		1245	{
		1246	dSP;
		1247	UNLOCK;
		1248
		1249	ENTER;
		1250	SAVETMPS;
		1251
		1252	PUSHMARK (SP);
		1253	PUTBACK;
		1254	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1255
		1256	FREETMPS;
		1257	LEAVE;
		1258	continue;
		1259	}
		1260
		1261	ta->next = SvSTATE (next_sv);
		1262
		1263	/* cannot transfer to destroyed coros, skip and look for next */
		1264	if (ta->next->flags & CF_DESTROYED)
		1265	{
		1266	UNLOCK;
		1267	SvREFCNT_dec (next_sv);
		1268	/* coro_nready is already taken care of by destroy */
		1269	continue;
		1270	}
		1271
		1272	--coro_nready;
		1273	UNLOCK;
		1274	break;
		1275	}
		1276
		1277	/* free this only after the transfer */
859	prev = GvSV (coro_current);	1278	prev_sv = SvRV (coro_current);
		1279	ta->prev = SvSTATE (prev_sv);
		1280	TRANSFER_CHECK (*ta);
		1281	assert (ta->next->flags & CF_READY);
		1282	ta->next->flags &= ~CF_READY;
		1283	SvRV_set (coro_current, next_sv);
860		1284
861	if (cede)	1285	LOCK;
862	coro_enq (SvREFCNT_inc (prev));	1286	free_coro_mortal (aTHX);
863		1287	coro_mortal = prev_sv;
864	next = coro_deq (PRIO_MIN);	1288	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	}	1289	}
877		1290
		1291	static void
		1292	prepare_cede (pTHX_ struct transfer_args *ta)
		1293	{
		1294	api_ready (coro_current);
		1295	prepare_schedule (aTHX_ ta);
		1296	}
		1297
		1298	static int
		1299	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1300	{
		1301	if (coro_nready)
		1302	{
		1303	SV *prev = SvRV (coro_current);
		1304	prepare_schedule (aTHX_ ta);
		1305	api_ready (prev);
		1306	return 1;
		1307	}
		1308	else
		1309	return 0;
		1310	}
		1311
		1312	static void
		1313	api_schedule (void)
		1314	{
		1315	dTHX;
		1316	struct transfer_args ta;
		1317
		1318	prepare_schedule (aTHX_ &ta);
		1319	TRANSFER (ta);
		1320	}
		1321
		1322	static int
		1323	api_cede (void)
		1324	{
		1325	dTHX;
		1326	struct transfer_args ta;
		1327
		1328	prepare_cede (aTHX_ &ta);
		1329
		1330	if (ta.prev != ta.next)
		1331	{
		1332	TRANSFER (ta);
		1333	return 1;
		1334	}
		1335	else
		1336	return 0;
		1337	}
		1338
		1339	static int
		1340	api_cede_notself (void)
		1341	{
		1342	dTHX;
		1343	struct transfer_args ta;
		1344
		1345	if (prepare_cede_notself (aTHX_ &ta))
		1346	{
		1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
		1352	}
		1353
		1354	static void
		1355	api_trace (SV *coro_sv, int flags)
		1356	{
		1357	dTHX;
		1358	struct coro *coro = SvSTATE (coro_sv);
		1359
		1360	if (flags & CC_TRACE)
		1361	{
		1362	if (!coro->cctx)
		1363	coro->cctx = cctx_new ();
		1364	else if (!(coro->cctx->flags & CC_TRACE))
		1365	croak ("cannot enable tracing on coroutine with custom stack");
		1366
		1367	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1368	}
		1369	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1370	{
		1371	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1372
		1373	if (coro->flags & CF_RUNNING)
		1374	PL_runops = RUNOPS_DEFAULT;
		1375	else
		1376	coro->runops = RUNOPS_DEFAULT;
		1377	}
		1378	}
		1379
878	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879		1381
880	PROTOTYPES: ENABLE	1382	PROTOTYPES: DISABLE
881		1383
882	BOOT:	1384	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	1385	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1386	#ifdef USE_ITHREADS
885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1387	MUTEX_INIT (&coro_mutex);
		1388	#endif
		1389	BOOT_PAGESIZE;
		1390
		1391	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1392	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1393
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1394	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		1395
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1399	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893	if (!padlist_cache)
894	padlist_cache = newHV ();
895		1400
896	main_mainstack = PL_mainstack;	1401	main_mainstack = PL_mainstack;
		1402	main_top_env = PL_top_env;
		1403
		1404	while (main_top_env->je_prev)
		1405	main_top_env = main_top_env->je_prev;
897		1406
898	coroapi.ver = CORO_API_VERSION;	1407	coroapi.ver = CORO_API_VERSION;
899	coroapi.transfer = api_transfer;	1408	coroapi.transfer = api_transfer;
900	}
901		1409
902	Coro::State	1410	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	1411	}
904	SV * args	1412
905	PROTOTYPE: $	1413	SV *
		1414	new (char *klass, ...)
906	CODE:	1415	CODE:
907	Coro__State coro;	1416	{
		1417	struct coro *coro;
		1418	HV *hv;
		1419	int i;
908		1420
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);	1421	Newz (0, coro, 1, struct coro);
		1422	coro->args = newAV ();
		1423	coro->flags = CF_NEW;
913		1424
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1425	if (coro_first) coro_first->prev = coro;
915	coro->mainstack = 0; /* actual work is done inside transfer */	1426	coro->next = coro_first;
916	coro->stack = 0;	1427	coro_first = coro;
917		1428
918	RETVAL = coro;	1429	coro->hv = hv = newHV ();
		1430	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1431	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1432
		1433	for (i = 1; i < items; i++)
		1434	av_push (coro->args, newSVsv (ST (i)));
		1435	}
919	OUTPUT:	1436	OUTPUT:
920	RETVAL	1437	RETVAL
921		1438
		1439	# these not obviously related functions are all rolled into the same xs
		1440	# function to increase chances that they all will call transfer with the same
		1441	# stack offset
922	void	1442	void
923	transfer(prev, next, flags)	1443	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1444	ALIAS:
925	Coro::State_or_hashref next	1445	Coro::State::transfer = 1
926	int flags	1446	Coro::schedule = 2
927	PROTOTYPE: @	1447	Coro::cede = 3
		1448	Coro::cede_notself = 4
928	CODE:	1449	CODE:
929	PUTBACK;	1450	{
930	transfer (aTHX_ prev, next, flags);	1451	struct transfer_args ta;
931	SPAGAIN;	1452
		1453	switch (ix)
		1454	{
		1455	case 0:
		1456	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1457	ta.next = 0;
		1458	break;
		1459
		1460	case 1:
		1461	if (items != 2)
		1462	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1463
		1464	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1465	break;
		1466
		1467	case 2:
		1468	prepare_schedule (aTHX_ &ta);
		1469	break;
		1470
		1471	case 3:
		1472	prepare_cede (aTHX_ &ta);
		1473	break;
		1474
		1475	case 4:
		1476	if (!prepare_cede_notself (aTHX_ &ta))
		1477	XSRETURN_EMPTY;
		1478
		1479	break;
		1480	}
		1481
		1482	BARRIER;
		1483	TRANSFER (ta);
		1484
		1485	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1486	XSRETURN_YES;
		1487	}
		1488
		1489	bool
		1490	_destroy (SV *coro_sv)
		1491	CODE:
		1492	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1493	OUTPUT:
		1494	RETVAL
932		1495
933	void	1496	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)	1497	_exit (code)
968	int code	1498	int code
969	PROTOTYPE: $	1499	PROTOTYPE: $
970	CODE:	1500	CODE:
971	#if defined(__GLIBC__) || _POSIX_C_SOURCE
972	_exit (code);	1501	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978		1502
979	MODULE = Coro::State PACKAGE = Coro::Cont	1503	int
		1504	cctx_stacksize (int new_stacksize = 0)
		1505	CODE:
		1506	RETVAL = coro_stacksize;
		1507	if (new_stacksize)
		1508	coro_stacksize = new_stacksize;
		1509	OUTPUT:
		1510	RETVAL
980		1511
981	# this is slightly dirty (should expose a c-level api)	1512	int
		1513	cctx_count ()
		1514	CODE:
		1515	RETVAL = cctx_count;
		1516	OUTPUT:
		1517	RETVAL
		1518
		1519	int
		1520	cctx_idle ()
		1521	CODE:
		1522	RETVAL = cctx_idle;
		1523	OUTPUT:
		1524	RETVAL
982		1525
983	void	1526	void
984	yield(...)	1527	list ()
985	PROTOTYPE: @	1528	PPCODE:
		1529	{
		1530	struct coro *coro;
		1531	for (coro = coro_first; coro; coro = coro->next)
		1532	if (coro->hv)
		1533	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1534	}
		1535
		1536	void
		1537	call (Coro::State coro, SV *coderef)
		1538	ALIAS:
		1539	eval = 1
		1540	CODE:
		1541	{
		1542	if (coro->mainstack)
		1543	{
		1544	struct coro temp;
		1545	Zero (&temp, 1, struct coro);
		1546
		1547	if (!(coro->flags & CF_RUNNING))
		1548	{
		1549	save_perl (aTHX_ &temp);
		1550	load_perl (aTHX_ coro);
		1551	}
		1552
		1553	{
		1554	dSP;
		1555	ENTER;
		1556	SAVETMPS;
		1557	PUSHMARK (SP);
		1558	PUTBACK;
		1559	if (ix)
		1560	eval_sv (coderef, 0);
		1561	else
		1562	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1563	SPAGAIN;
		1564	FREETMPS;
		1565	LEAVE;
		1566	PUTBACK;
		1567	}
		1568
		1569	if (!(coro->flags & CF_RUNNING))
		1570	{
		1571	save_perl (aTHX_ coro);
		1572	load_perl (aTHX_ &temp);
		1573	}
		1574	}
		1575	}
		1576
		1577	SV *
		1578	is_ready (Coro::State coro)
		1579	PROTOTYPE: $
		1580	ALIAS:
		1581	is_ready = CF_READY
		1582	is_running = CF_RUNNING
		1583	is_new = CF_NEW
		1584	is_destroyed = CF_DESTROYED
		1585	CODE:
		1586	RETVAL = boolSV (coro->flags & ix);
		1587	OUTPUT:
		1588	RETVAL
		1589
		1590	void
		1591	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1592
		1593	SV *
		1594	has_stack (Coro::State coro)
		1595	PROTOTYPE: $
		1596	CODE:
		1597	RETVAL = boolSV (!!coro->cctx);
		1598	OUTPUT:
		1599	RETVAL
		1600
		1601	int
		1602	is_traced (Coro::State coro)
		1603	PROTOTYPE: $
		1604	CODE:
		1605	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1606	OUTPUT:
		1607	RETVAL
		1608
		1609	IV
		1610	rss (Coro::State coro)
		1611	PROTOTYPE: $
		1612	ALIAS:
		1613	usecount = 1
986	CODE:	1614	CODE:
987	static SV *returnstk;	1615	switch (ix)
988	SV *sv;	1616	{
989	AV *defav = GvAV (PL_defgv);	1617	case 0: RETVAL = coro_rss (aTHX_ coro); break;
990	struct coro *prev, *next;	1618	case 1: RETVAL = coro->usecount; break;
		1619	}
		1620	OUTPUT:
		1621	RETVAL
991		1622
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		1623
1009	MODULE = Coro::State PACKAGE = Coro	1624	MODULE = Coro::State PACKAGE = Coro
1010		1625
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1626	BOOT:
1014	{	1627	{
1015	int i;	1628	int i;
		1629
		1630	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1631	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1632	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1633
		1634	coro_current = get_sv ("Coro::current", FALSE);
		1635	SvREADONLY_on (coro_current);
		1636
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1637	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1638
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1639	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1640	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1641	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1642	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1643	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1644	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		1645
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1646	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029	coro_ready[i] = newAV ();	1647	coro_ready[i] = newAV ();
1030		1648
1031	{	1649	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1650	SV *sv = perl_get_sv("Coro::API", 1);
1033		1651
1034	coroapi.schedule = api_schedule;	1652	coroapi.schedule = api_schedule;
		1653	coroapi.cede = api_cede;
		1654	coroapi.cede_notself = api_cede_notself;
1035	coroapi.ready = api_ready;	1655	coroapi.ready = api_ready;
		1656	coroapi.is_ready = api_is_ready;
1036	coroapi.nready = &coro_nready;	1657	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1658	coroapi.current = coro_current;
1038		1659
1039	GCoroAPI = &coroapi;	1660	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1661	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1662	SvREADONLY_on (sv);
1042	}	1663	}
1043	}	1664	}
1044		1665
1045	void	1666	void
1046	ready(self)	1667	_set_current (SV *current)
1047	SV * self
1048	PROTOTYPE: $	1668	PROTOTYPE: $
1049	CODE:	1669	CODE:
1050	api_ready (self);	1670	SvREFCNT_dec (SvRV (coro_current));
		1671	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1051		1672
1052	int	1673	int
		1674	prio (Coro::State coro, int newprio = 0)
		1675	ALIAS:
		1676	nice = 1
		1677	CODE:
		1678	{
		1679	RETVAL = coro->prio;
		1680
		1681	if (items > 1)
		1682	{
		1683	if (ix)
		1684	newprio = coro->prio - newprio;
		1685
		1686	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1687	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1688
		1689	coro->prio = newprio;
		1690	}
		1691	}
		1692	OUTPUT:
		1693	RETVAL
		1694
		1695	SV *
		1696	ready (SV *self)
		1697	PROTOTYPE: $
		1698	CODE:
		1699	RETVAL = boolSV (api_ready (self));
		1700	OUTPUT:
		1701	RETVAL
		1702
		1703	int
1053	nready(...)	1704	nready (...)
1054	PROTOTYPE:	1705	PROTOTYPE:
1055	CODE:	1706	CODE:
1056	RETVAL = coro_nready;	1707	RETVAL = coro_nready;
1057	OUTPUT:	1708	OUTPUT:
1058	RETVAL	1709	RETVAL
1059		1710
		1711	# for async_pool speedup
1060	void	1712	void
1061	schedule(...)	1713	_pool_1 (SV *cb)
1062	PROTOTYPE:
1063	ALIAS:
1064	cede = 1
1065	CODE:	1714	CODE:
1066	api_schedule (ix);	1715	{
		1716	struct coro *coro = SvSTATE (coro_current);
		1717	HV *hv = (HV *)SvRV (coro_current);
		1718	AV *defav = GvAV (PL_defgv);
		1719	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1720	AV *invoke_av;
		1721	int i, len;
1067		1722
		1723	if (!invoke)
		1724	croak ("\3terminate\2\n");
		1725
		1726	SvREFCNT_dec (coro->saved_deffh);
		1727	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1728
		1729	hv_store (hv, "desc", sizeof ("desc") - 1,
		1730	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1731
		1732	invoke_av = (AV *)SvRV (invoke);
		1733	len = av_len (invoke_av);
		1734
		1735	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1736
		1737	if (len > 0)
		1738	{
		1739	av_fill (defav, len - 1);
		1740	for (i = 0; i < len; ++i)
		1741	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1742	}
		1743
		1744	SvREFCNT_dec (invoke);
		1745	}
		1746
		1747	void
		1748	_pool_2 (SV *cb)
		1749	CODE:
		1750	{
		1751	struct coro *coro = SvSTATE (coro_current);
		1752
		1753	sv_setsv (cb, &PL_sv_undef);
		1754
		1755	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1756	coro->saved_deffh = 0;
		1757
		1758	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1759	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1760	croak ("\3terminate\2\n");
		1761
		1762	av_clear (GvAV (PL_defgv));
		1763	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1764	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1765
		1766	coro->prio = 0;
		1767
		1768	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1769	api_trace (coro_current, 0);
		1770
		1771	av_push (av_async_pool, newSVsv (coro_current));
		1772	}
		1773
		1774
		1775	MODULE = Coro::State PACKAGE = Coro::AIO
		1776
		1777	SV *
		1778	_get_state ()
		1779	CODE:
		1780	{
		1781	struct io_state *data;
		1782
		1783	RETVAL = newSV (sizeof (struct io_state));
		1784	data = (struct io_state *)SvPVX (RETVAL);
		1785	SvCUR_set (RETVAL, sizeof (struct io_state));
		1786	SvPOK_only (RETVAL);
		1787
		1788	data->errorno = errno;
		1789	data->laststype = PL_laststype;
		1790	data->laststatval = PL_laststatval;
		1791	data->statcache = PL_statcache;
		1792	}
		1793	OUTPUT:
		1794	RETVAL
		1795
		1796	void
		1797	_set_state (char *data_)
		1798	PROTOTYPE: $
		1799	CODE:
		1800	{
		1801	struct io_state *data = (void *)data_;
		1802
		1803	errno = data->errorno;
		1804	PL_laststype = data->laststype;
		1805	PL_laststatval = data->laststatval;
		1806	PL_statcache = data->statcache;
		1807	}
		1808

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