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Comparing Coro/Coro/State.xs (file contents):
Revision 1.56 by pcg, Thu Apr 1 02:41:05 2004 UTC vs.
Revision 1.193 by root, Fri Oct 5 23:38:40 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if PATCHLEVEL < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
10	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
12	# endif	57	# endif
13	# ifndef call_sv	58	# ifndef call_sv
14	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
27	# endif	72	# endif
28	#endif	73	#endif
29		74
30	#include "libcoro/coro.c"	75	/* 5.8.7 */
31		76	#ifndef SvRV_set
32	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
33
34	#ifdef HAVE_MMAP
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	78	#endif
44	#endif
45		79
46	#define SUB_INIT "Coro::State::initialize"	80	/* 5.8.8 */
47	#define UCORO_STATE "_coro_state"	81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
48		87
49	/* The next macro should declare a variable stacklevel that contains and approximation	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
50	* to the current C stack pointer. Its property is that it changes with each call	89	# undef CORO_STACKGUARD
51	* and should be unique. */	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
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	104	#define STACKLEVEL ((void *)&stacklevel)
53		105
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		107
56	#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))
57		117
58	#include "CoroAPI.h"	118	#include "CoroAPI.h"
59		119
60	#ifdef USE_ITHREADS	120	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	121	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	122	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	123	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	124	#else
65	# define LOCK 0	125	# define LOCK (void)0
66	# define UNLOCK 0	126	# define UNLOCK (void)0
67	#endif	127	#endif
68		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;
69	static struct CoroAPI coroapi;	139	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	140	static AV *main_mainstack; /* used to differentiate between $main and others */
		141	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	142	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static __thread SV *coro_mortal; /* will be freed after next transfer */	143	static SV *coro_mortal; /* will be freed after next transfer */
75		144
76	/* 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 */
77	typedef struct {	166	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	167	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		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;
82	coro_context cctx;	177	coro_context cctx;
83		178
84	void *sptr;	179	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	180	int valgrind_id;
86	} coro_stack;	181	#endif
		182	unsigned char flags;
		183	} coro_cctx;
87		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 */
88	struct coro {	193	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	194	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	195	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	SV **stack_base;
115	SV **stack_max;
116	SV **tmps_stack;
117	I32 tmps_floor;
118	I32 tmps_ix;
119	I32 tmps_max;
120	I32 *markstack;
121	I32 *markstack_ptr;
122	I32 *markstack_max;
123	I32 *scopestack;
124	I32 scopestack_ix;
125	I32 scopestack_max;
126	ANY *savestack;
127	I32 savestack_ix;
128	I32 savestack_max;
129	OP **retstack;
130	I32 retstack_ix;
131	I32 retstack_max;
132	COP *curcop;
133	JMPENV *top_env;
134		196
135	/* data associated with this coroutine (initial args) */	197	/* data associated with this coroutine (initial args) */
136	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 */
137	};	227	};
138		228
139	typedef struct coro *Coro__State;	229	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	230	typedef struct coro *Coro__State_or_hashref;
141		231
142	/* mostly copied from op.c:cv_clone2 */	232	/** Coro ********************************************************************/
143	STATIC AV *	233
144	clone_padlist (pTHX_ AV *protopadlist)	234	#define PRIO_MAX 3
		235	#define PRIO_HIGH 1
		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)
145	{	251	{
146	AV *av;	252	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	253	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		254
165	newpadlist = newAV ();	255	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	256	AvREAL_off (newpadlist);
167	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)));
168	av_store (newpadlist, 1, (SV *) newpad);	266	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		267
239	return newpadlist;	268	return newpadlist;
240	}	269	}
241		270
242	STATIC void	271	static void
243	free_padlist (pTHX_ AV *padlist)	272	free_padlist (pTHX_ AV *padlist)
244	{	273	{
245	/* may be during global destruction */	274	/* may be during global destruction */
246	if (SvREFCNT (padlist))	275	if (SvREFCNT (padlist))
247	{	276	{
…		…
261		290
262	SvREFCNT_dec ((SV*)padlist);	291	SvREFCNT_dec ((SV*)padlist);
263	}	292	}
264	}	293	}
265		294
266	STATIC int	295	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	296	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	297	{
269	AV *padlist;	298	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	299	AV *av = (AV *)mg->mg_obj;
271		300
272	/* casting is fun. */	301	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	302	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	303	free_padlist (aTHX_ padlist);
		304
		305	SvREFCNT_dec (av);
		306
		307	return 0;
275	}	308	}
276		309
277	#define PERL_MAGIC_coro PERL_MAGIC_ext	310	#define PERL_MAGIC_coro PERL_MAGIC_ext
278		311
279	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	312	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
280		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))
		346
281	/* the next two functions merely cache the padlists */	347	/* the next two functions merely cache the padlists */
282	STATIC void	348	static void
283	get_padlist (pTHX_ CV *cv)	349	get_padlist (pTHX_ CV *cv)
284	{	350	{
285	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	351	MAGIC *mg = CORO_MAGIC (cv);
		352	AV *av;
286		353
287	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	354	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
288	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	355	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289	else	356	else
		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;
		363	SvREFCNT_dec (cp);
		364	#else
290	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	365	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		366	#endif
		367	}
291	}	368	}
292		369
293	STATIC void	370	static void
294	put_padlist (pTHX_ CV *cv)	371	put_padlist (pTHX_ CV *cv)
295	{	372	{
296	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	373	MAGIC *mg = CORO_MAGIC (cv);
		374	AV *av;
297		375
298	if (!mg)	376	if (!mg)
299	{	377	{
300	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	378	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
301	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	379	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302	mg->mg_virtual = &vtbl_coro;	380	mg->mg_virtual = &vtbl_coro;
303	mg->mg_obj = (SV *)newAV ();	381	mg->mg_obj = (SV *)newAV ();
304	}	382	}
305		383
306	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	384	av = (AV *)mg->mg_obj;
307	}
308		385
309	#define SB do {	386	if (AvFILLp (av) >= AvMAX (av))
310	#define SE } while (0)	387	av_extend (av, AvMAX (av) + 1);
311		388
312	#define LOAD(state) load_state(aTHX_ (state));	389	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
313	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	390	}
314		391
315	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	392	/** load & save, init *******************************************************/
316		393
317	static void	394	static void
318	load_state(pTHX_ Coro__State c)	395	load_perl (pTHX_ Coro__State c)
319	{	396	{
320	PL_dowarn = c->dowarn;	397	#define VAR(name,type) PL_ ## name = c->name;
321	PL_in_eval = c->in_eval;	398	# include "state.h"
		399	#undef VAR
322		400
323	PL_curstackinfo = c->curstackinfo;	401	GvSV (PL_defgv) = c->defsv;
324	PL_curstack = c->curstack;	402	GvAV (PL_defgv) = c->defav;
325	PL_mainstack = c->mainstack;	403	GvSV (PL_errgv) = c->errsv;
326	PL_stack_sp = c->stack_sp;	404	GvSV (irsgv) = c->irssv_sv;
327	PL_op = c->op;
328	PL_curpad = c->curpad;
329	PL_comppad = c->comppad;
330	PL_stack_base = c->stack_base;
331	PL_stack_max = c->stack_max;
332	PL_tmps_stack = c->tmps_stack;
333	PL_tmps_floor = c->tmps_floor;
334	PL_tmps_ix = c->tmps_ix;
335	PL_tmps_max = c->tmps_max;
336	PL_markstack = c->markstack;
337	PL_markstack_ptr = c->markstack_ptr;
338	PL_markstack_max = c->markstack_max;
339	PL_scopestack = c->scopestack;
340	PL_scopestack_ix = c->scopestack_ix;
341	PL_scopestack_max = c->scopestack_max;
342	PL_savestack = c->savestack;
343	PL_savestack_ix = c->savestack_ix;
344	PL_savestack_max = c->savestack_max;
345	PL_retstack = c->retstack;
346	PL_retstack_ix = c->retstack_ix;
347	PL_retstack_max = c->retstack_max;
348	PL_curcop = c->curcop;
349	PL_top_env = c->top_env;
350
351	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
352	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
353	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
354		405
355	{	406	{
356	dSP;	407	dSP;
357	CV *cv;	408	CV *cv;
358		409
359	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
360	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
361	{	412	{
362	AV *padlist = (AV *)POPs;
363
364	if (padlist)
365	{
366	put_padlist (aTHX_ cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
367	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
368	}	415	CvPADLIST (cv) = (AV *)POPs;
369
370	++CvDEPTH(cv);
371	}	416	}
372		417
373	PUTBACK;	418	PUTBACK;
374	}	419	}
375	}	420	}
376		421
377	static void	422	static void
378	save_state(pTHX_ Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
379	{	424	{
380	{	425	{
381	dSP;	426	dSP;
382	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
383	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
386	/*	431	/*
387	* 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
388	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
389	*/	434	*/
390		435
391	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
392	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
393	for (;;)	438	for (;;)
394	{	439	{
395	while (cxix >= 0)	440	while (cxix >= 0)
396	{	441	{
397	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
398		443
399	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
400	{	445	{
401	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
402	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
403	{	449	{
404	EXTEND (SP, CvDEPTH(cv)*2);	450	EXTEND (SP, 3);
405
406	while (--CvDEPTH(cv))
407	{
408	/* this tells the restore code to increment CvDEPTH */
409	PUSHs (Nullsv);
410	PUSHs ((SV *)cv);
411	}
412
413	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
414	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
415		454
		455	CvDEPTH (cv) = 0;
416	get_padlist (aTHX_ cv); /* this is a monster */	456	get_padlist (aTHX_ cv);
417	}	457	}
418	}	458	}
419	#ifdef CXt_FORMAT
420	else if (CxTYPE(cx) == CXt_FORMAT)
421	{
422	/* I never used formats, so how should I know how these are implemented? */
423	/* my bold guess is as a simple, plain sub... */
424	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
425	}
426	#endif
427	}	459	}
428		460
429	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
430	break;	462	break;
431		463
432	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
433	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
434	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
435	}	467	}
436		468
437	PUTBACK;	469	PUTBACK;
438	}	470	}
439		471
440	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = GvAV (PL_defgv);
441	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = DEFSV;
442	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = ERRSV;
		475	c->irssv_sv = GvSV (irsgv);
443		476
444	c->dowarn = PL_dowarn;	477	#define VAR(name,type)c->name = PL_ ## name;
445	c->in_eval = PL_in_eval;	478	# include "state.h"
446		479	#undef VAR
447	c->curstackinfo = PL_curstackinfo;
448	c->curstack = PL_curstack;
449	c->mainstack = PL_mainstack;
450	c->stack_sp = PL_stack_sp;
451	c->op = PL_op;
452	c->curpad = PL_curpad;
453	c->comppad = PL_comppad;
454	c->stack_base = PL_stack_base;
455	c->stack_max = PL_stack_max;
456	c->tmps_stack = PL_tmps_stack;
457	c->tmps_floor = PL_tmps_floor;
458	c->tmps_ix = PL_tmps_ix;
459	c->tmps_max = PL_tmps_max;
460	c->markstack = PL_markstack;
461	c->markstack_ptr = PL_markstack_ptr;
462	c->markstack_max = PL_markstack_max;
463	c->scopestack = PL_scopestack;
464	c->scopestack_ix = PL_scopestack_ix;
465	c->scopestack_max = PL_scopestack_max;
466	c->savestack = PL_savestack;
467	c->savestack_ix = PL_savestack_ix;
468	c->savestack_max = PL_savestack_max;
469	c->retstack = PL_retstack;
470	c->retstack_ix = PL_retstack_ix;
471	c->retstack_max = PL_retstack_max;
472	c->curcop = PL_curcop;
473	c->top_env = PL_top_env;
474	}	480	}
475		481
476	/*	482	/*
477	* allocate various perl stacks. This is an exact copy	483	* allocate various perl stacks. This is an exact copy
478	* of perl.c:init_stacks, except that it uses less memory	484	* of perl.c:init_stacks, except that it uses less memory
479	* on the (sometimes correct) assumption that coroutines do	485	* on the (sometimes correct) assumption that coroutines do
480	* not usually need a lot of stackspace.	486	* not usually need a lot of stackspace.
481	*/	487	*/
482	STATIC void	488	#if CORO_PREFER_PERL_FUNCTIONS
		489	# define coro_init_stacks init_stacks
		490	#else
		491	static void
483	coro_init_stacks (pTHX)	492	coro_init_stacks (pTHX)
484	{	493	{
485	LOCK;	494	PL_curstackinfo = new_stackinfo(64, 6);
486
487	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
488	PL_curstackinfo->si_type = PERLSI_MAIN;	495	PL_curstackinfo->si_type = PERLSI_MAIN;
489	PL_curstack = PL_curstackinfo->si_stack;	496	PL_curstack = PL_curstackinfo->si_stack;
490	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	497	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491		498
492	PL_stack_base = AvARRAY(PL_curstack);	499	PL_stack_base = AvARRAY(PL_curstack);
493	PL_stack_sp = PL_stack_base;	500	PL_stack_sp = PL_stack_base;
494	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	501	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
495		502
496	New(50,PL_tmps_stack,96,SV*);	503	New(50,PL_tmps_stack,64,SV*);
497	PL_tmps_floor = -1;	504	PL_tmps_floor = -1;
498	PL_tmps_ix = -1;	505	PL_tmps_ix = -1;
499	PL_tmps_max = 96;	506	PL_tmps_max = 64;
500		507
501	New(54,PL_markstack,16,I32);	508	New(54,PL_markstack,16,I32);
502	PL_markstack_ptr = PL_markstack;	509	PL_markstack_ptr = PL_markstack;
503	PL_markstack_max = PL_markstack + 16;	510	PL_markstack_max = PL_markstack + 16;
504		511
…		…
508		515
509	New(54,PL_scopestack,16,I32);	516	New(54,PL_scopestack,16,I32);
510	PL_scopestack_ix = 0;	517	PL_scopestack_ix = 0;
511	PL_scopestack_max = 16;	518	PL_scopestack_max = 16;
512		519
513	New(54,PL_savestack,96,ANY);	520	New(54,PL_savestack,64,ANY);
514	PL_savestack_ix = 0;	521	PL_savestack_ix = 0;
515	PL_savestack_max = 96;	522	PL_savestack_max = 64;
516		523
		524	#if !PERL_VERSION_ATLEAST (5,9,0)
517	New(54,PL_retstack,8,OP*);	525	New(54,PL_retstack,4,OP*);
518	PL_retstack_ix = 0;	526	PL_retstack_ix = 0;
519	PL_retstack_max = 8;	527	PL_retstack_max = 4;
520		528	#endif
521	UNLOCK;
522	}	529	}
		530	#endif
523		531
524	/*	532	/*
525	* destroy the stacks, the callchain etc...	533	* destroy the stacks, the callchain etc...
526	*/	534	*/
527	STATIC void	535	static void
528	destroy_stacks(pTHX)	536	coro_destroy_stacks (pTHX)
529	{	537	{
530	if (!IN_DESTRUCT)
531	{
532	/* is this ugly, I ask? */
533	LEAVE_SCOPE (0);
534
535	/* sure it is, but more important: is it correct?? :/ */
536	FREETMPS;
537	}
538
539	while (PL_curstackinfo->si_next)	538	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;	539	PL_curstackinfo = PL_curstackinfo->si_next;
541		540
542	while (PL_curstackinfo)	541	while (PL_curstackinfo)
543	{	542	{
544	PERL_SI *p = PL_curstackinfo->si_prev;	543	PERL_SI *p = PL_curstackinfo->si_prev;
545		544
546	{
547	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */
550	}
551
552	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
553	{
554	dounwind(-1);
555	SvREFCNT_dec(PL_curstackinfo->si_stack);	546	SvREFCNT_dec (PL_curstackinfo->si_stack);
556	}
557		547
558	Safefree(PL_curstackinfo->si_cxstack);	548	Safefree (PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);	549	Safefree (PL_curstackinfo);
560	PL_curstackinfo = p;	550	PL_curstackinfo = p;
561	}	551	}
562		552
563	Safefree(PL_tmps_stack);	553	Safefree (PL_tmps_stack);
564	Safefree(PL_markstack);	554	Safefree (PL_markstack);
565	Safefree(PL_scopestack);	555	Safefree (PL_scopestack);
566	Safefree(PL_savestack);	556	Safefree (PL_savestack);
		557	#if !PERL_VERSION_ATLEAST (5,9,0)
567	Safefree(PL_retstack);	558	Safefree (PL_retstack);
568	}
569
570	static void
571	allocate_stack (Coro__State ctx, int alloc)
572	{
573	coro_stack *stack;
574
575	New (0, stack, 1, coro_stack);
576
577	stack->refcnt = 1;
578	stack->usecnt = 1;
579	stack->gencnt = ctx->gencnt = 0;
580
581	if (alloc)
582	{
583	#if HAVE_MMAP
584	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
585	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586	if (stack->sptr == (void *)-1)
587	#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)
588	{	570	{
589	/*FIXME*//*D*//* reasonable stack size! */	571	#define VAR(name,type)coro->name = PL_ ## name;
590	stack->ssize = - (8192 * sizeof (long));	572	# include "state.h"
591	New (0, stack->sptr, 8192, long);	573	#undef VAR
592	}	574	}
593	}
594	else
595	stack->sptr = 0;
596		575
597	ctx->stack = stack;	576	rss += sizeof (coro->curstackinfo);
598	}	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);
599		584
600	static void	585	#if !PERL_VERSION_ATLEAST (5,9,0)
601	deallocate_stack (Coro__State ctx)	586	rss += coro->retstack_max * sizeof (OP *);
602	{	587	#endif
603	coro_stack *stack = ctx->stack;
604
605	ctx->stack = 0;
606
607	if (stack)
608	{	588	}
609	if (!--stack->refcnt)
610	{
611	#ifdef HAVE_MMAP
612	if (stack->ssize > 0 && stack->sptr)
613	munmap (stack->sptr, stack->ssize);
614	else
615	#endif
616	Safefree (stack->sptr);
617		589
618	Safefree (stack);	590	return rss;
619	}
620	else if (ctx->gencnt == stack->gencnt)
621	--stack->usecnt;
622	}
623	}	591	}
624		592
		593	/** coroutine stack handling ************************************************/
		594
625	static void	595	static void
626	setup_coro (void *arg)	596	coro_setup (pTHX_ struct coro *coro)
627	{	597	{
628	/*	598	/*
629	* emulate part of the perl startup here.	599	* emulate part of the perl startup here.
630	*/	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	ENTER; /* necessary e.g. for dounwind */
		620
		621	{
		622	dSP;
		623	LOGOP myop;
		624
		625	Zero (&myop, 1, LOGOP);
		626	myop.op_next = Nullop;
		627	myop.op_flags = OPf_WANT_VOID;
		628
		629	PUSHMARK (SP);
		630	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		631	PUTBACK;
		632	PL_op = (OP *)&myop;
		633	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		634	SPAGAIN;
		635	}
		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	av_extend (av, top - bot);
		714	while (bot < top)
		715	av_push (av, SvREFCNT_inc (*bot++));
		716
		717	PL_runops = RUNOPS_DEFAULT;
		718	ENTER;
		719	SAVETMPS;
		720	EXTEND (SP, 3);
		721	PUSHMARK (SP);
		722	PUSHs (&PL_sv_no);
		723	PUSHs (fullname);
		724	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		725	PUTBACK;
		726	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		727	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		728	SPAGAIN;
		729	FREETMPS;
		730	LEAVE;
		731	PL_runops = runops_trace;
		732	}
		733
		734	if (oldcop != PL_curcop)
		735	{
		736	oldcop = PL_curcop;
		737
		738	if (PL_curcop != &PL_compiling)
		739	{
		740	SV **cb;
		741
		742	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		743	{
		744	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		745
		746	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		747	{
		748	runops_proc_t old_runops = PL_runops;
		749	dSP;
		750	GV *gv = CvGV (cx->blk_sub.cv);
		751	SV *fullname = sv_2mortal (newSV (0));
		752
		753	if (isGV (gv))
		754	gv_efullname3 (fullname, gv, 0);
		755
		756	PL_runops = RUNOPS_DEFAULT;
		757	ENTER;
		758	SAVETMPS;
		759	EXTEND (SP, 3);
		760	PUSHMARK (SP);
		761	PUSHs (&PL_sv_yes);
		762	PUSHs (fullname);
		763	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		764	PUTBACK;
		765	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		766	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		767	SPAGAIN;
		768	FREETMPS;
		769	LEAVE;
		770	PL_runops = runops_trace;
		771	}
		772
		773	oldcxix = cxstack_ix;
		774	}
		775
		776	if (cctx->flags & CC_TRACE_LINE)
		777	{
		778	dSP;
		779
		780	PL_runops = RUNOPS_DEFAULT;
		781	ENTER;
		782	SAVETMPS;
		783	EXTEND (SP, 3);
		784	PL_runops = RUNOPS_DEFAULT;
		785	PUSHMARK (SP);
		786	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		787	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		788	PUTBACK;
		789	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		790	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		791	SPAGAIN;
		792	FREETMPS;
		793	LEAVE;
		794	PL_runops = runops_trace;
		795	}
		796	}
		797	}
		798	}
		799	}
		800
		801	TAINT_NOT;
		802	return 0;
		803	}
		804
		805	/* inject a fake call to Coro::State::_cctx_init into the execution */
		806	/* _cctx_init should be careful, as it could be called at almost any time */
		807	/* during execution of a perl program */
		808	static void NOINLINE
		809	prepare_cctx (pTHX_ coro_cctx *cctx)
		810	{
		811	dSP;
		812	LOGOP myop;
		813
		814	PL_top_env = &PL_start_env;
		815
		816	if (cctx->flags & CC_TRACE)
		817	PL_runops = runops_trace;
		818
		819	Zero (&myop, 1, LOGOP);
		820	myop.op_next = PL_op;
		821	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		822
		823	PUSHMARK (SP);
		824	EXTEND (SP, 2);
		825	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		826	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		827	PUTBACK;
		828	PL_op = (OP *)&myop;
		829	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		830	SPAGAIN;
		831	}
		832
		833	/*
		834	* this is a _very_ stripped down perl interpreter ;)
		835	*/
		836	static void
		837	coro_run (void *arg)
		838	{
631	dTHX;	839	dTHX;
632	dSP;
633	Coro__State ctx = (Coro__State)arg;
634	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
635		840
636	coro_init_stacks (aTHX);	841	/* coro_run is the alternative tail of transfer(), so unlock here. */
637	/*PL_curcop = 0;*/	842	UNLOCK;
638	/*PL_in_eval = PL_in_eval;*/ /* inherit */
639	SvREFCNT_dec (GvAV (PL_defgv));
640	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
641		843
642	SPAGAIN;	844	/* we now skip the entersub that lead to transfer() */
		845	PL_op = PL_op->op_next;
643		846
644	if (ctx->stack)	847	/* inject a fake subroutine call to cctx_init */
645	{	848	prepare_cctx (aTHX_ (coro_cctx *)arg);
646	ctx->cursp = 0;
647		849
648	PUSHMARK(SP);	850	/* somebody or something will hit me for both perl_run and PL_restartop */
649	PUTBACK;	851	PL_restartop = PL_op;
650	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	852	perl_run (PL_curinterp);
651		853
652	if (SvTRUE (ERRSV))	854	/*
653	croak (NULL);	855	* If perl-run returns we assume exit() was being called or the coro
654	else	856	* fell off the end, which seems to be the only valid (non-bug)
655	croak ("FATAL: CCTXT coroutine returned!");	857	* reason for perl_run to return. We try to exit by jumping to the
		858	* bootstrap-time "top" top_env, as we cannot restore the "main"
		859	* coroutine as Coro has no such concept
		860	*/
		861	PL_top_env = main_top_env;
		862	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		863	}
		864
		865	static coro_cctx *
		866	cctx_new ()
		867	{
		868	coro_cctx *cctx;
		869	void *stack_start;
		870	size_t stack_size;
		871
		872	++cctx_count;
		873
		874	Newz (0, cctx, 1, coro_cctx);
		875
		876	#if HAVE_MMAP
		877
		878	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		879	/* mmap supposedly does allocate-on-write for us */
		880	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		881
		882	if (cctx->sptr != (void *)-1)
		883	{
		884	# if CORO_STACKGUARD
		885	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		886	# endif
		887	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		888	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		889	cctx->flags |= CC_MAPPED;
656	}	890	}
657	else	891	else
658	{	892	#endif
659	UNOP myop;
660
661	PL_op = (OP *)&myop;
662
663	Zero(&myop, 1, UNOP);
664	myop.op_next = Nullop;
665	myop.op_flags = OPf_WANT_VOID;
666
667	PUSHMARK(SP);
668	XPUSHs (sub_init);
669	/*
670	* the next line is slightly wrong, as PL_op->op_next
671	* is actually being executed so we skip the first op.
672	* that doesn't matter, though, since it is only
673	* pp_nextstate and we never return...
674	* ah yes, and I don't care anyways ;)
675	*/
676	PUTBACK;
677	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
678	SPAGAIN;
679
680	ENTER; /* necessary e.g. for dounwind */
681	}	893	{
682	}	894	cctx->ssize = coro_stacksize * (long)sizeof (long);
		895	New (0, cctx->sptr, coro_stacksize, long);
683		896
684	static void	897	if (!cctx->sptr)
685	continue_coro (void *arg)	898	{
686	{	899	perror ("FATAL: unable to allocate stack for coroutine");
687	/*	900	_exit (EXIT_FAILURE);
688	* this is a _very_ stripped down perl interpreter ;)	901	}
689	*/
690	dTHX;
691	Coro__State ctx = (Coro__State)arg;
692	JMPENV coro_start_env;
693		902
694	PL_top_env = &ctx->start_env;	903	stack_start = cctx->sptr;
		904	stack_size = cctx->ssize;
		905	}
695		906
696	ctx->cursp = 0;	907	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
697	PL_op = PL_op->op_next;	908	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
698	CALLRUNOPS(aTHX);
699		909
700	abort ();	910	return cctx;
701	}	911	}
702		912
703	STATIC void	913	static void
		914	cctx_destroy (coro_cctx *cctx)
		915	{
		916	if (!cctx)
		917	return;
		918
		919	--cctx_count;
		920
		921	#if CORO_USE_VALGRIND
		922	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		923	#endif
		924
		925	#if HAVE_MMAP
		926	if (cctx->flags & CC_MAPPED)
		927	munmap (cctx->sptr, cctx->ssize);
		928	else
		929	#endif
		930	Safefree (cctx->sptr);
		931
		932	Safefree (cctx);
		933	}
		934
		935	/* wether this cctx should be destructed */
		936	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		937
		938	static coro_cctx *
		939	cctx_get (pTHX)
		940	{
		941	while (cctx_first)
		942	{
		943	coro_cctx *cctx = cctx_first;
		944	cctx_first = cctx->next;
		945	--cctx_idle;
		946
		947	if (!CCTX_EXPIRED (cctx))
		948	return cctx;
		949
		950	cctx_destroy (cctx);
		951	}
		952
		953	return cctx_new ();
		954	}
		955
		956	static void
		957	cctx_put (coro_cctx *cctx)
		958	{
		959	/* free another cctx if overlimit */
		960	if (cctx_idle >= MAX_IDLE_CCTX)
		961	{
		962	coro_cctx *first = cctx_first;
		963	cctx_first = first->next;
		964	--cctx_idle;
		965
		966	cctx_destroy (first);
		967	}
		968
		969	++cctx_idle;
		970	cctx->next = cctx_first;
		971	cctx_first = cctx;
		972	}
		973
		974	/** coroutine switching *****************************************************/
		975
		976	static void NOINLINE
		977	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		978	{
		979	if (prev != next)
		980	{
		981	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		982	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		983
		984	if (next->flags & CF_RUNNING)
		985	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		986
		987	if (next->flags & CF_DESTROYED)
		988	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		989
		990	if (PL_lex_state != LEX_NOTPARSING)
		991	croak ("Coro::State::transfer called while parsing, but this is not supported");
		992	}
		993	}
		994
		995	/* always use the TRANSFER macro */
		996	static void NOINLINE
704	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	997	transfer (pTHX_ struct coro *prev, struct coro *next)
705	{	998	{
706	dSTACKLEVEL;	999	dSTACKLEVEL;
707		1000
		1001	/* sometimes transfer is only called to set idle_sp */
		1002	if (!next)
		1003	{
		1004	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1005	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1006	}
708	if (prev != next)	1007	else if (prev != next)
709	{	1008	{
710	if (next->mainstack)	1009	coro_cctx *prev__cctx;
		1010
		1011	if (prev->flags & CF_NEW)
711	{	1012	{
712	LOCK;	1013	/* create a new empty context */
713	SAVE (prev, flags);	1014	Newz (0, prev->cctx, 1, coro_cctx);
714	LOAD (next);	1015	prev->flags &= ~CF_NEW;
715	UNLOCK;	1016	prev->flags |= CF_RUNNING;
716
717	/* mark this state as in-use */
718	next->mainstack = 0;
719	next->tmps_ix = -2;
720
721	/* stacklevel changed? if yes, grab the stack for us! */
722	if (flags & TRANSFER_SAVE_CCTXT)
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726	else if (prev->cursp != stacklevel
727	&& prev->stack->usecnt > 1)
728	{
729	prev->gencnt = ++prev->stack->gencnt;
730	prev->stack->usecnt = 1;
731	}
732
733	/* has our stack been invalidated? */
734	if (next->stack && next->stack->gencnt != next->gencnt)
735	{
736	deallocate_stack (next);
737	allocate_stack (next, 1);
738	coro_create (&(next->stack->cctx),
739	continue_coro, (void *)next,
740	next->stack->sptr, labs (next->stack->ssize));
741	}
742
743	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744	prev->cursp = stacklevel;
745	/* don't add any code here */
746	}
747	else
748	next->cursp = stacklevel;
749	}	1017	}
750	else if (next->tmps_ix == -2)	1018
751	croak ("tried to transfer to running coroutine");	1019	prev->flags &= ~CF_RUNNING;
		1020	next->flags |= CF_RUNNING;
		1021
		1022	LOCK;
		1023
		1024	if (next->flags & CF_NEW)
		1025	{
		1026	/* need to start coroutine */
		1027	next->flags &= ~CF_NEW;
		1028	/* first get rid of the old state */
		1029	save_perl (aTHX_ prev);
		1030	/* setup coroutine call */
		1031	coro_setup (aTHX_ next);
		1032	}
752	else	1033	else
753	{	1034	{
754	LOCK;	1035	/* coroutine already started */
755	SAVE (prev, -1); /* first get rid of the old state */	1036	save_perl (aTHX_ prev);
756	UNLOCK;	1037	load_perl (aTHX_ next);
757
758	if (flags & TRANSFER_SAVE_CCTXT)
759	{
760	if (!prev->stack)
761	allocate_stack (prev, 0);
762
763	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
764	{
765	PL_top_env = &next->start_env;
766
767	setup_coro (next);
768	next->cursp = stacklevel;
769
770	prev->stack->refcnt++;
771	prev->stack->usecnt++;
772	next->stack = prev->stack;
773	next->gencnt = prev->gencnt;
774	}
775	else
776	{
777	assert (!next->stack);
778	allocate_stack (next, 1);
779	coro_create (&(next->stack->cctx),
780	setup_coro, (void *)next,
781	next->stack->sptr, labs (next->stack->ssize));
782	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
783	prev->cursp = stacklevel;
784	/* don't add any code here */
785	}
786	}
787	else
788	{
789	setup_coro (next);
790	next->cursp = stacklevel;
791	}
792	}	1038	}
793	}
794		1039
795	LOCK;	1040	prev__cctx = prev->cctx;
796	if (coro_mortal)	1041
797	{	1042	/* possibly "free" the cctx */
798	SvREFCNT_dec (coro_mortal);	1043	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
799	coro_mortal = 0;	1044	{
800	}	1045	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1046	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1047
		1048	prev->cctx = 0;
		1049
		1050	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1051	if (CCTX_EXPIRED (prev__cctx))
		1052	next->cctx = cctx_get (aTHX);
		1053
		1054	cctx_put (prev__cctx);
		1055	}
		1056
		1057	++next->usecount;
		1058
		1059	if (!next->cctx)
		1060	next->cctx = cctx_get (aTHX);
		1061
		1062	if (prev__cctx != next->cctx)
		1063	{
		1064	prev__cctx->top_env = PL_top_env;
		1065	PL_top_env = next->cctx->top_env;
		1066	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1067	}
		1068
		1069	free_coro_mortal (aTHX);
801	UNLOCK;	1070	UNLOCK;
		1071	}
802	}	1072	}
803		1073
804	#define SV_CORO(sv,func) \	1074	struct transfer_args
805	do { \	1075	{
806	if (SvROK (sv)) \	1076	struct coro *prev, *next;
807	sv = SvRV (sv); \	1077	};
808	\
809	if (SvTYPE (sv) == SVt_PVHV) \
810	{ \
811	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
812	\
813	if (!he) \
814	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
815	\
816	(sv) = SvRV (HeVAL(he)); \
817	} \
818	\
819	/* must also be changed inside Coro::Cont::yield */ \
820	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
821	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
822	\
823	} while(0)
824		1078
825	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1079	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1080	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
826		1081
		1082	/** high level stuff ********************************************************/
		1083
827	static void	1084	static int
		1085	coro_state_destroy (pTHX_ struct coro *coro)
		1086	{
		1087	if (coro->flags & CF_DESTROYED)
		1088	return 0;
		1089
		1090	coro->flags |= CF_DESTROYED;
		1091
		1092	if (coro->flags & CF_READY)
		1093	{
		1094	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1095	/* alternative: look through all ready queues and remove the coro */
		1096	LOCK;
		1097	--coro_nready;
		1098	UNLOCK;
		1099	}
		1100	else
		1101	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1102
		1103	if (coro->mainstack && coro->mainstack != main_mainstack)
		1104	{
		1105	struct coro temp;
		1106
		1107	if (coro->flags & CF_RUNNING)
		1108	croak ("FATAL: tried to destroy currently running coroutine");
		1109
		1110	save_perl (aTHX_ &temp);
		1111	load_perl (aTHX_ coro);
		1112
		1113	coro_destroy (aTHX_ coro);
		1114
		1115	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1116
		1117	coro->mainstack = 0;
		1118	}
		1119
		1120	cctx_destroy (coro->cctx);
		1121	SvREFCNT_dec (coro->args);
		1122
		1123	if (coro->next) coro->next->prev = coro->prev;
		1124	if (coro->prev) coro->prev->next = coro->next;
		1125	if (coro == coro_first) coro_first = coro->next;
		1126
		1127	return 1;
		1128	}
		1129
		1130	static int
		1131	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1132	{
		1133	struct coro *coro = (struct coro *)mg->mg_ptr;
		1134	mg->mg_ptr = 0;
		1135
		1136	coro->hv = 0;
		1137
		1138	if (--coro->refcnt < 0)
		1139	{
		1140	coro_state_destroy (aTHX_ coro);
		1141	Safefree (coro);
		1142	}
		1143
		1144	return 0;
		1145	}
		1146
		1147	static int
		1148	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1149	{
		1150	struct coro *coro = (struct coro *)mg->mg_ptr;
		1151
		1152	++coro->refcnt;
		1153
		1154	return 0;
		1155	}
		1156
		1157	static MGVTBL coro_state_vtbl = {
		1158	0, 0, 0, 0,
		1159	coro_state_free,
		1160	0,
		1161	#ifdef MGf_DUP
		1162	coro_state_dup,
		1163	#else
		1164	# define MGf_DUP 0
		1165	#endif
		1166	};
		1167
		1168	static void
		1169	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1170	{
		1171	ta->prev = SvSTATE (prev_sv);
		1172	ta->next = SvSTATE (next_sv);
		1173	TRANSFER_CHECK (*ta);
		1174	}
		1175
		1176	static void
828	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1177	api_transfer (SV *prev_sv, SV *next_sv)
829	{	1178	{
830	SV_CORO (prev, "Coro::transfer");	1179	dTHX;
831	SV_CORO (next, "Coro::transfer");	1180	struct transfer_args ta;
832		1181
833	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1182	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1183	TRANSFER (ta);
834	}	1184	}
835		1185
836	/** Coro ********************************************************************/	1186	/** Coro ********************************************************************/
837		1187
838	#define PRIO_MAX 3
839	#define PRIO_HIGH 1
840	#define PRIO_NORMAL 0
841	#define PRIO_LOW -1
842	#define PRIO_IDLE -3
843	#define PRIO_MIN -4
844
845	/* for Coro.pm */
846	static GV *coro_current, *coro_idle;
847	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
848	static int coro_nready;
849
850	static void	1188	static void
851	coro_enq (pTHX_ SV *sv)	1189	coro_enq (pTHX_ SV *coro_sv)
852	{	1190	{
853	if (SvTYPE (sv) == SVt_PVHV)
854	{
855	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
856	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
857
858	prio = prio > PRIO_MAX ? PRIO_MAX
859	: prio < PRIO_MIN ? PRIO_MIN
860	: prio;
861
862	av_push (coro_ready [prio - PRIO_MIN], sv);	1191	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
863	coro_nready++;
864
865	return;
866	}
867
868	croak ("Coro::ready tried to enqueue something that is not a coroutine");
869	}	1192	}
870		1193
871	static SV *	1194	static SV *
872	coro_deq (pTHX_ int min_prio)	1195	coro_deq (pTHX_ int min_prio)
873	{	1196	{
…		…
876	min_prio -= PRIO_MIN;	1199	min_prio -= PRIO_MIN;
877	if (min_prio < 0)	1200	if (min_prio < 0)
878	min_prio = 0;	1201	min_prio = 0;
879		1202
880	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1203	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
881	if (av_len (coro_ready[prio]) >= 0)	1204	if (AvFILLp (coro_ready [prio]) >= 0)
882	{
883	coro_nready--;
884	return av_shift (coro_ready[prio]);	1205	return av_shift (coro_ready [prio]);
885	}
886		1206
887	return 0;	1207	return 0;
888	}	1208	}
889		1209
890	static void	1210	static int
891	api_ready (SV *coro)	1211	api_ready (SV *coro_sv)
892	{	1212	{
893	dTHX;	1213	dTHX;
		1214	struct coro *coro;
894		1215
895	if (SvROK (coro))	1216	if (SvROK (coro_sv))
896	coro = SvRV (coro);	1217	coro_sv = SvRV (coro_sv);
		1218
		1219	coro = SvSTATE (coro_sv);
		1220
		1221	if (coro->flags & CF_READY)
		1222	return 0;
		1223
		1224	coro->flags |= CF_READY;
897		1225
898	LOCK;	1226	LOCK;
899	coro_enq (aTHX_ SvREFCNT_inc (coro));	1227	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1228	++coro_nready;
900	UNLOCK;	1229	UNLOCK;
		1230
		1231	return 1;
		1232	}
		1233
		1234	static int
		1235	api_is_ready (SV *coro_sv)
		1236	{
		1237	dTHX;
		1238	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1239	}
		1240
		1241	static void
		1242	prepare_schedule (pTHX_ struct transfer_args *ta)
		1243	{
		1244	SV *prev_sv, *next_sv;
		1245
		1246	for (;;)
		1247	{
		1248	LOCK;
		1249	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1250
		1251	/* nothing to schedule: call the idle handler */
		1252	if (!next_sv)
		1253	{
		1254	dSP;
		1255	UNLOCK;
		1256
		1257	ENTER;
		1258	SAVETMPS;
		1259
		1260	PUSHMARK (SP);
		1261	PUTBACK;
		1262	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1263
		1264	FREETMPS;
		1265	LEAVE;
		1266	continue;
		1267	}
		1268
		1269	ta->next = SvSTATE (next_sv);
		1270
		1271	/* cannot transfer to destroyed coros, skip and look for next */
		1272	if (ta->next->flags & CF_DESTROYED)
		1273	{
		1274	UNLOCK;
		1275	SvREFCNT_dec (next_sv);
		1276	/* coro_nready is already taken care of by destroy */
		1277	continue;
		1278	}
		1279
		1280	--coro_nready;
		1281	UNLOCK;
		1282	break;
		1283	}
		1284
		1285	/* free this only after the transfer */
		1286	prev_sv = SvRV (coro_current);
		1287	ta->prev = SvSTATE (prev_sv);
		1288	TRANSFER_CHECK (*ta);
		1289	assert (ta->next->flags & CF_READY);
		1290	ta->next->flags &= ~CF_READY;
		1291	SvRV_set (coro_current, next_sv);
		1292
		1293	LOCK;
		1294	free_coro_mortal (aTHX);
		1295	coro_mortal = prev_sv;
		1296	UNLOCK;
		1297	}
		1298
		1299	static void
		1300	prepare_cede (pTHX_ struct transfer_args *ta)
		1301	{
		1302	api_ready (coro_current);
		1303	prepare_schedule (aTHX_ ta);
		1304	}
		1305
		1306	static int
		1307	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1308	{
		1309	if (coro_nready)
		1310	{
		1311	SV *prev = SvRV (coro_current);
		1312	prepare_schedule (aTHX_ ta);
		1313	api_ready (prev);
		1314	return 1;
		1315	}
		1316	else
		1317	return 0;
901	}	1318	}
902		1319
903	static void	1320	static void
904	api_schedule (void)	1321	api_schedule (void)
905	{	1322	{
906	dTHX;	1323	dTHX;
		1324	struct transfer_args ta;
907		1325
908	SV *prev, *next;	1326	prepare_schedule (aTHX_ &ta);
909		1327	TRANSFER (ta);
910	LOCK;
911
912	prev = SvRV (GvSV (coro_current));
913	next = coro_deq (aTHX_ PRIO_MIN);
914
915	if (!next)
916	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
917
918	/* free this only after the transfer */
919	coro_mortal = prev;
920	SV_CORO (prev, "Coro::schedule");
921
922	SvRV (GvSV (coro_current)) = next;
923
924	SV_CORO (next, "Coro::schedule");
925
926	UNLOCK;
927
928	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
929	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
930	}	1328	}
931		1329
932	static void	1330	static int
933	api_cede (void)	1331	api_cede (void)
934	{	1332	{
935	dTHX;	1333	dTHX;
		1334	struct transfer_args ta;
936		1335
937	LOCK;	1336	prepare_cede (aTHX_ &ta);
938	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
939	UNLOCK;
940		1337
941	api_schedule ();	1338	if (ta.prev != ta.next)
		1339	{
		1340	TRANSFER (ta);
		1341	return 1;
		1342	}
		1343	else
		1344	return 0;
942	}	1345	}
943		1346
		1347	static int
		1348	api_cede_notself (void)
		1349	{
		1350	dTHX;
		1351	struct transfer_args ta;
		1352
		1353	if (prepare_cede_notself (aTHX_ &ta))
		1354	{
		1355	TRANSFER (ta);
		1356	return 1;
		1357	}
		1358	else
		1359	return 0;
		1360	}
		1361
		1362	static void
		1363	api_trace (SV *coro_sv, int flags)
		1364	{
		1365	dTHX;
		1366	struct coro *coro = SvSTATE (coro_sv);
		1367
		1368	if (flags & CC_TRACE)
		1369	{
		1370	if (!coro->cctx)
		1371	coro->cctx = cctx_new ();
		1372	else if (!(coro->cctx->flags & CC_TRACE))
		1373	croak ("cannot enable tracing on coroutine with custom stack");
		1374
		1375	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1376	}
		1377	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1378	{
		1379	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1380
		1381	if (coro->flags & CF_RUNNING)
		1382	PL_runops = RUNOPS_DEFAULT;
		1383	else
		1384	coro->runops = RUNOPS_DEFAULT;
		1385	}
		1386	}
		1387
944	MODULE = Coro::State PACKAGE = Coro::State	1388	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
945		1389
946	PROTOTYPES: ENABLE	1390	PROTOTYPES: DISABLE
947		1391
948	BOOT:	1392	BOOT:
949	{ /* {} necessary for stoopid perl-5.6.x */	1393	{
950	#ifdef USE_ITHREADS	1394	#ifdef USE_ITHREADS
951	MUTEX_INIT (&coro_mutex);	1395	MUTEX_INIT (&coro_mutex);
952	#endif	1396	#endif
		1397	BOOT_PAGESIZE;
953		1398
954	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1399	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
955	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1400	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1401
956	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1402	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
957		1403
958	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1404	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
959	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1405	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
960	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1406	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
961	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1407	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
962		1408
963	main_mainstack = PL_mainstack;	1409	main_mainstack = PL_mainstack;
		1410	main_top_env = PL_top_env;
		1411
		1412	while (main_top_env->je_prev)
		1413	main_top_env = main_top_env->je_prev;
964		1414
965	coroapi.ver = CORO_API_VERSION;	1415	coroapi.ver = CORO_API_VERSION;
966	coroapi.transfer = api_transfer;	1416	coroapi.transfer = api_transfer;
967	}
968		1417
969	Coro::State	1418	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
970	_newprocess(args)	1419	}
971	SV * args	1420
972	PROTOTYPE: $	1421	SV *
		1422	new (char *klass, ...)
973	CODE:	1423	CODE:
974	Coro__State coro;	1424	{
		1425	struct coro *coro;
		1426	HV *hv;
		1427	int i;
975		1428
976	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
977	croak ("Coro::State::_newprocess expects an arrayref");
978
979	Newz (0, coro, 1, struct coro);	1429	Newz (0, coro, 1, struct coro);
		1430	coro->args = newAV ();
		1431	coro->flags = CF_NEW;
980		1432
981	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1433	if (coro_first) coro_first->prev = coro;
982	coro->mainstack = 0; /* actual work is done inside transfer */	1434	coro->next = coro_first;
983	coro->stack = 0;	1435	coro_first = coro;
984		1436
985	/* same as JMPENV_BOOTSTRAP */	1437	coro->hv = hv = newHV ();
986	/* we might be able to recycle start_env, but safe is safe */	1438	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
987	//Zero(&coro->start_env, 1, JMPENV);	1439	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
988	coro->start_env.je_ret = -1;
989	coro->start_env.je_mustcatch = TRUE;
990		1440
991	RETVAL = coro;	1441	av_extend (coro->args, items - 1);
		1442	for (i = 1; i < items; i++)
		1443	av_push (coro->args, newSVsv (ST (i)));
		1444	}
992	OUTPUT:	1445	OUTPUT:
993	RETVAL	1446	RETVAL
994		1447
		1448	# these not obviously related functions are all rolled into the same xs
		1449	# function to increase chances that they all will call transfer with the same
		1450	# stack offset
995	void	1451	void
996	transfer(prev, next, flags)	1452	_set_stacklevel (...)
997	SV *prev	1453	ALIAS:
998	SV *next	1454	Coro::State::transfer = 1
999	int flags	1455	Coro::schedule = 2
1000	PROTOTYPE: @	1456	Coro::cede = 3
		1457	Coro::cede_notself = 4
1001	CODE:	1458	CODE:
1002	PUTBACK;	1459	{
1003	SV_CORO (next, "Coro::transfer");	1460	struct transfer_args ta;
1004	SV_CORO (prev, "Coro::transfer");	1461
1005	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1462	switch (ix)
1006	SPAGAIN;	1463	{
		1464	case 0:
		1465	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1466	ta.next = 0;
		1467	break;
		1468
		1469	case 1:
		1470	if (items != 2)
		1471	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1472
		1473	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1474	break;
		1475
		1476	case 2:
		1477	prepare_schedule (aTHX_ &ta);
		1478	break;
		1479
		1480	case 3:
		1481	prepare_cede (aTHX_ &ta);
		1482	break;
		1483
		1484	case 4:
		1485	if (!prepare_cede_notself (aTHX_ &ta))
		1486	XSRETURN_EMPTY;
		1487
		1488	break;
		1489	}
		1490
		1491	BARRIER;
		1492	TRANSFER (ta);
		1493
		1494	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1495	XSRETURN_YES;
		1496	}
		1497
		1498	bool
		1499	_destroy (SV *coro_sv)
		1500	CODE:
		1501	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1502	OUTPUT:
		1503	RETVAL
1007		1504
1008	void	1505	void
1009	DESTROY(coro)
1010	Coro::State coro
1011	CODE:
1012
1013	if (coro->mainstack && coro->mainstack != main_mainstack)
1014	{
1015	struct coro temp;
1016
1017	PUTBACK;
1018	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1019	LOAD(aTHX_ coro);
1020	SPAGAIN;
1021
1022	destroy_stacks (aTHX);
1023
1024	LOAD((&temp)); /* this will get rid of defsv etc.. */
1025	SPAGAIN;
1026
1027	coro->mainstack = 0;
1028	}
1029
1030	deallocate_stack (coro);
1031	SvREFCNT_dec (coro->args);
1032	Safefree (coro);
1033
1034	void
1035	_exit(code)	1506	_exit (code)
1036	int code	1507	int code
1037	PROTOTYPE: $	1508	PROTOTYPE: $
1038	CODE:	1509	CODE:
1039	_exit (code);	1510	_exit (code);
1040		1511
1041	MODULE = Coro::State PACKAGE = Coro::Cont	1512	int
		1513	cctx_stacksize (int new_stacksize = 0)
		1514	CODE:
		1515	RETVAL = coro_stacksize;
		1516	if (new_stacksize)
		1517	coro_stacksize = new_stacksize;
		1518	OUTPUT:
		1519	RETVAL
1042		1520
1043	# this is slightly dirty (should expose a c-level api)	1521	int
		1522	cctx_count ()
		1523	CODE:
		1524	RETVAL = cctx_count;
		1525	OUTPUT:
		1526	RETVAL
		1527
		1528	int
		1529	cctx_idle ()
		1530	CODE:
		1531	RETVAL = cctx_idle;
		1532	OUTPUT:
		1533	RETVAL
1044		1534
1045	void	1535	void
1046	yield(...)	1536	list ()
1047	PROTOTYPE: @	1537	PPCODE:
		1538	{
		1539	struct coro *coro;
		1540	for (coro = coro_first; coro; coro = coro->next)
		1541	if (coro->hv)
		1542	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1543	}
		1544
		1545	void
		1546	call (Coro::State coro, SV *coderef)
		1547	ALIAS:
		1548	eval = 1
		1549	CODE:
		1550	{
		1551	if (coro->mainstack)
		1552	{
		1553	struct coro temp;
		1554	Zero (&temp, 1, struct coro);
		1555
		1556	if (!(coro->flags & CF_RUNNING))
		1557	{
		1558	save_perl (aTHX_ &temp);
		1559	load_perl (aTHX_ coro);
		1560	}
		1561
		1562	{
		1563	dSP;
		1564	ENTER;
		1565	SAVETMPS;
		1566	PUSHMARK (SP);
		1567	PUTBACK;
		1568	if (ix)
		1569	eval_sv (coderef, 0);
		1570	else
		1571	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1572	SPAGAIN;
		1573	FREETMPS;
		1574	LEAVE;
		1575	PUTBACK;
		1576	}
		1577
		1578	if (!(coro->flags & CF_RUNNING))
		1579	{
		1580	save_perl (aTHX_ coro);
		1581	load_perl (aTHX_ &temp);
		1582	}
		1583	}
		1584	}
		1585
		1586	SV *
		1587	is_ready (Coro::State coro)
		1588	PROTOTYPE: $
		1589	ALIAS:
		1590	is_ready = CF_READY
		1591	is_running = CF_RUNNING
		1592	is_new = CF_NEW
		1593	is_destroyed = CF_DESTROYED
		1594	CODE:
		1595	RETVAL = boolSV (coro->flags & ix);
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	void
		1600	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1601
		1602	SV *
		1603	has_stack (Coro::State coro)
		1604	PROTOTYPE: $
		1605	CODE:
		1606	RETVAL = boolSV (!!coro->cctx);
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	int
		1611	is_traced (Coro::State coro)
		1612	PROTOTYPE: $
		1613	CODE:
		1614	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618	IV
		1619	rss (Coro::State coro)
		1620	PROTOTYPE: $
		1621	ALIAS:
		1622	usecount = 1
1048	CODE:	1623	CODE:
1049	static SV *returnstk;	1624	switch (ix)
1050	SV *sv;	1625	{
1051	AV *defav = GvAV (PL_defgv);	1626	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1052	struct coro *prev, *next;	1627	case 1: RETVAL = coro->usecount; break;
		1628	}
		1629	OUTPUT:
		1630	RETVAL
1053		1631
1054	if (!returnstk)
1055	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1056
1057	/* set up @_ -- ugly */
1058	av_clear (defav);
1059	av_fill (defav, items - 1);
1060	while (items--)
1061	av_store (defav, items, SvREFCNT_inc (ST(items)));
1062
1063	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1064	sv = av_pop ((AV *)SvRV (returnstk));
1065	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1066	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1067	SvREFCNT_dec (sv);
1068
1069	transfer(aTHX_ prev, next, 0);
1070		1632
1071	MODULE = Coro::State PACKAGE = Coro	1633	MODULE = Coro::State PACKAGE = Coro
1072		1634
1073	# this is slightly dirty (should expose a c-level api)
1074
1075	BOOT:	1635	BOOT:
1076	{	1636	{
1077	int i;	1637	int i;
		1638
		1639	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1640	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1641	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1642
		1643	coro_current = get_sv ("Coro::current", FALSE);
		1644	SvREADONLY_on (coro_current);
		1645
1078	HV *stash = gv_stashpv ("Coro", TRUE);	1646	coro_stash = gv_stashpv ("Coro", TRUE);
1079		1647
1080	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1648	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1649	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1650	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1651	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1652	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1653	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086
1087	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1088	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1089		1654
1090	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1655	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091	coro_ready[i] = newAV ();	1656	coro_ready[i] = newAV ();
1092		1657
1093	{	1658	{
1094	SV *sv = perl_get_sv("Coro::API", 1);	1659	SV *sv = perl_get_sv("Coro::API", 1);
1095		1660
1096	coroapi.schedule = api_schedule;	1661	coroapi.schedule = api_schedule;
1097	coroapi.cede = api_cede;	1662	coroapi.cede = api_cede;
		1663	coroapi.cede_notself = api_cede_notself;
1098	coroapi.ready = api_ready;	1664	coroapi.ready = api_ready;
		1665	coroapi.is_ready = api_is_ready;
1099	coroapi.nready = &coro_nready;	1666	coroapi.nready = &coro_nready;
1100	coroapi.current = coro_current;	1667	coroapi.current = coro_current;
1101		1668
1102	GCoroAPI = &coroapi;	1669	GCoroAPI = &coroapi;
1103	sv_setiv(sv, (IV)&coroapi);	1670	sv_setiv (sv, (IV)&coroapi);
1104	SvREADONLY_on(sv);	1671	SvREADONLY_on (sv);
1105	}	1672	}
1106	}	1673	}
1107		1674
1108	#if !PERL_MICRO
1109
1110	void	1675	void
1111	ready(self)	1676	_set_current (SV *current)
1112	SV * self
1113	PROTOTYPE: $	1677	PROTOTYPE: $
1114	CODE:	1678	CODE:
1115	api_ready (self);	1679	SvREFCNT_dec (SvRV (coro_current));
1116		1680	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1117	#endif
1118		1681
1119	int	1682	int
		1683	prio (Coro::State coro, int newprio = 0)
		1684	ALIAS:
		1685	nice = 1
		1686	CODE:
		1687	{
		1688	RETVAL = coro->prio;
		1689
		1690	if (items > 1)
		1691	{
		1692	if (ix)
		1693	newprio = coro->prio - newprio;
		1694
		1695	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1696	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1697
		1698	coro->prio = newprio;
		1699	}
		1700	}
		1701	OUTPUT:
		1702	RETVAL
		1703
		1704	SV *
		1705	ready (SV *self)
		1706	PROTOTYPE: $
		1707	CODE:
		1708	RETVAL = boolSV (api_ready (self));
		1709	OUTPUT:
		1710	RETVAL
		1711
		1712	int
1120	nready(...)	1713	nready (...)
1121	PROTOTYPE:	1714	PROTOTYPE:
1122	CODE:	1715	CODE:
1123	RETVAL = coro_nready;	1716	RETVAL = coro_nready;
1124	OUTPUT:	1717	OUTPUT:
1125	RETVAL	1718	RETVAL
1126		1719
		1720	# for async_pool speedup
1127	void	1721	void
1128	schedule(...)	1722	_pool_1 (SV *cb)
1129	PROTOTYPE:
1130	CODE:	1723	CODE:
1131	api_schedule ();	1724	{
		1725	struct coro *coro = SvSTATE (coro_current);
		1726	HV *hv = (HV *)SvRV (coro_current);
		1727	AV *defav = GvAV (PL_defgv);
		1728	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1729	AV *invoke_av;
		1730	int i, len;
		1731
		1732	if (!invoke)
		1733	croak ("\3terminate\2\n");
		1734
		1735	SvREFCNT_dec (coro->saved_deffh);
		1736	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1737
		1738	hv_store (hv, "desc", sizeof ("desc") - 1,
		1739	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1740
		1741	invoke_av = (AV *)SvRV (invoke);
		1742	len = av_len (invoke_av);
		1743
		1744	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1745
		1746	if (len > 0)
		1747	{
		1748	av_fill (defav, len - 1);
		1749	for (i = 0; i < len; ++i)
		1750	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1751	}
		1752
		1753	SvREFCNT_dec (invoke);
		1754	}
1132		1755
1133	void	1756	void
1134	cede(...)	1757	_pool_2 (SV *cb)
1135	PROTOTYPE:
1136	CODE:	1758	CODE:
1137	api_cede ();	1759	{
		1760	struct coro *coro = SvSTATE (coro_current);
1138		1761
		1762	sv_setsv (cb, &PL_sv_undef);
		1763
		1764	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1765	coro->saved_deffh = 0;
		1766
		1767	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1768	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1769	croak ("\3terminate\2\n");
		1770
		1771	av_clear (GvAV (PL_defgv));
		1772	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1773	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1774
		1775	coro->prio = 0;
		1776
		1777	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1778	api_trace (coro_current, 0);
		1779
		1780	av_push (av_async_pool, newSVsv (coro_current));
		1781	}
		1782
		1783
		1784	MODULE = Coro::State PACKAGE = Coro::AIO
		1785
		1786	SV *
		1787	_get_state ()
		1788	CODE:
		1789	{
		1790	struct io_state *data;
		1791
		1792	RETVAL = newSV (sizeof (struct io_state));
		1793	data = (struct io_state *)SvPVX (RETVAL);
		1794	SvCUR_set (RETVAL, sizeof (struct io_state));
		1795	SvPOK_only (RETVAL);
		1796
		1797	data->errorno = errno;
		1798	data->laststype = PL_laststype;
		1799	data->laststatval = PL_laststatval;
		1800	data->statcache = PL_statcache;
		1801	}
		1802	OUTPUT:
		1803	RETVAL
		1804
		1805	void
		1806	_set_state (char *data_)
		1807	PROTOTYPE: $
		1808	CODE:
		1809	{
		1810	struct io_state *data = (void *)data_;
		1811
		1812	errno = data->errorno;
		1813	PL_laststype = data->laststype;
		1814	PL_laststatval = data->laststatval;
		1815	PL_statcache = data->statcache;
		1816	}
		1817

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