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Comparing Coro/Coro/State.xs (file contents):
Revision 1.51 by pcg, Sun Nov 30 17:03:48 2003 UTC vs.
Revision 1.194 by root, Sat Oct 6 00:08:04 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 "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#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)
8	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
10	# endif	57	# endif
11	# ifndef call_sv	58	# ifndef call_sv
12	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
25	# endif	72	# endif
26	#endif	73	#endif
27		74
28	#include "libcoro/coro.c"	75	/* 5.8.7 */
29		76	#ifndef SvRV_set
30	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	78	#endif
42	#endif
43		79
44	#define SUB_INIT "Coro::State::initialize"	80	/* 5.8.8 */
45	#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
46		87
47	/* The next macro should declare a variable stacklevel that contains and approximation	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
48	* to the current C stack pointer. Its property is that it changes with each call	89	# undef CORO_STACKGUARD
49	* 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
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	104	#define STACKLEVEL ((void *)&stacklevel)
51		105
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		107
54	#define labs(l) ((l) >= 0 ? (l) : -(l))	108	#if __GNUC__ >= 3
		109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	# define expect(expr,value) __builtin_expect ((expr),(value))
		112	#else
		113	# define attribute(x)
		114	# define BARRIER
		115	# define expect(expr,value) (expr)
		116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
		120
		121	#define NOINLINE attribute ((noinline))
55		122
56	#include "CoroAPI.h"	123	#include "CoroAPI.h"
57		124
		125	#ifdef USE_ITHREADS
		126	static perl_mutex coro_mutex;
		127	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		128	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		129	#else
		130	# define LOCK (void)0
		131	# define UNLOCK (void)0
		132	#endif
		133
		134	/* helper storage struct for Coro::AIO */
		135	struct io_state
		136	{
		137	int errorno;
		138	I32 laststype;
		139	int laststatval;
		140	Stat_t statcache;
		141	};
		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
58	static struct CoroAPI coroapi;	144	static struct CoroAPI coroapi;
		145	static AV *main_mainstack; /* used to differentiate between $main and others */
		146	static JMPENV *main_top_env;
		147	static HV *coro_state_stash, *coro_stash;
		148	static SV *coro_mortal; /* will be freed after next transfer */
59		149
60	/* this is actually not only the c stack but also c registers etc... */	150	static GV *irsgv; /* $/ */
		151	static GV *stdoutgv; /* *STDOUT */
		152
		153	/* async_pool helper stuff */
		154	static SV *sv_pool_rss;
		155	static SV *sv_pool_size;
		156	static AV *av_async_pool;
		157
		158	static struct coro_cctx *cctx_first;
		159	static int cctx_count, cctx_idle;
		160
		161	enum {
		162	CC_MAPPED = 0x01,
		163	CC_NOREUSE = 0x02, /* throw this away after tracing */
		164	CC_TRACE = 0x04,
		165	CC_TRACE_SUB = 0x08, /* trace sub calls */
		166	CC_TRACE_LINE = 0x10, /* trace each statement */
		167	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		168	};
		169
		170	/* this is a structure representing a c-level coroutine */
61	typedef struct {	171	typedef struct coro_cctx {
62	int refcnt; /* pointer reference counter */	172	struct coro_cctx *next;
63	int usecnt; /* shared by how many coroutines */
64	int gencnt; /* generation counter */
65		173
		174	/* the stack */
		175	void *sptr;
		176	size_t ssize;
		177
		178	/* cpu state */
		179	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		180	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		181	JMPENV *top_env;
66	coro_context cctx;	182	coro_context cctx;
67		183
68	void *sptr;	184	#if CORO_USE_VALGRIND
69	long ssize; /* positive == mmap, otherwise malloc */	185	int valgrind_id;
70	} coro_stack;	186	#endif
		187	unsigned char flags;
		188	} coro_cctx;
71		189
		190	enum {
		191	CF_RUNNING = 0x0001, /* coroutine is running */
		192	CF_READY = 0x0002, /* coroutine is ready */
		193	CF_NEW = 0x0004, /* has never been switched to */
		194	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		195	};
		196
		197	/* this is a structure representing a perl-level coroutine */
72	struct coro {	198	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	199	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;	200	coro_cctx *cctx;
75
76	/* the optional C context */
77	coro_stack *stack;
78	void *cursp;
79	int gencnt;
80
81	/* optionally saved, might be zero */
82	AV *defav;
83	SV *defsv;
84	SV *errsv;
85
86	/* saved global state not related to stacks */
87	U8 dowarn;
88	I32 in_eval;
89
90	/* the stacks and related info (callchain etc..) */
91	PERL_SI *curstackinfo;
92	AV *curstack;
93	AV *mainstack;
94	SV **stack_sp;
95	OP *op;
96	SV **curpad;
97	AV *comppad;
98	SV **stack_base;
99	SV **stack_max;
100	SV **tmps_stack;
101	I32 tmps_floor;
102	I32 tmps_ix;
103	I32 tmps_max;
104	I32 *markstack;
105	I32 *markstack_ptr;
106	I32 *markstack_max;
107	I32 *scopestack;
108	I32 scopestack_ix;
109	I32 scopestack_max;
110	ANY *savestack;
111	I32 savestack_ix;
112	I32 savestack_max;
113	OP **retstack;
114	I32 retstack_ix;
115	I32 retstack_max;
116	COP *curcop;
117	JMPENV *top_env;
118		201
119	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
120	AV *args;	203	AV *args;
		204	int refcnt;
		205	int flags; /* CF_ flags */
		206
		207	/* optionally saved, might be zero */
		208	AV *defav; /* @_ */
		209	SV *defsv; /* $_ */
		210	SV *errsv; /* $@ */
		211	SV *deffh; /* default filehandle */
		212	SV *irssv; /* $/ */
		213	SV *irssv_sv; /* real $/ cache */
		214
		215	#define VAR(name,type) type name;
		216	# include "state.h"
		217	#undef VAR
		218
		219	/* statistics */
		220	int usecount; /* number of transfers to this coro */
		221
		222	/* coro process data */
		223	int prio;
		224	//SV *throw;
		225
		226	/* async_pool */
		227	SV *saved_deffh;
		228
		229	/* linked list */
		230	struct coro *next, *prev;
		231	HV *hv; /* the perl hash associated with this coro, if any */
121	};	232	};
122		233
123	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
125		236
126	static AV *main_mainstack; /* used to differentiate between $main and others */	237	/** Coro ********************************************************************/
127	static HV *coro_state_stash;
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV *coro_mortal; /* will be freed after next transfer */
132		238
133	/* mostly copied from op.c:cv_clone2 */	239	#define PRIO_MAX 3
134	STATIC AV *	240	#define PRIO_HIGH 1
135	clone_padlist (AV *protopadlist)	241	#define PRIO_NORMAL 0
		242	#define PRIO_LOW -1
		243	#define PRIO_IDLE -3
		244	#define PRIO_MIN -4
		245
		246	/* for Coro.pm */
		247	static SV *coro_current;
		248	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		249	static int coro_nready;
		250	static struct coro *coro_first;
		251
		252	/** lowlevel stuff **********************************************************/
		253
		254	static AV *
		255	coro_clone_padlist (pTHX_ CV *cv)
136	{	256	{
137	AV *av;	257	AV *padlist = CvPADLIST (cv);
138	I32 ix;
139	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
140	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
141	SV **pname = AvARRAY (protopad_name);
142	SV **ppad = AvARRAY (protopad);
143	I32 fname = AvFILLp (protopad_name);
144	I32 fpad = AvFILLp (protopad);
145	AV *newpadlist, *newpad_name, *newpad;	258	AV *newpadlist, *newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		259
156	newpadlist = newAV ();	260	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	261	AvREAL_off (newpadlist);
158	av_store (newpadlist, 0, (SV *) newpad_name);	262	#if PERL_VERSION_ATLEAST (5,9,0)
		263	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		264	#else
		265	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		266	#endif
		267	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		268	--AvFILLp (padlist);
		269
		270	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
159	av_store (newpadlist, 1, (SV *) newpad);	271	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char *name = SvPVX (namesv); /* XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV *kid = cv_clone((CV*)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225		272
226	return newpadlist;	273	return newpadlist;
227	}	274	}
228		275
229	STATIC void	276	static void
230	free_padlist (AV *padlist)	277	free_padlist (pTHX_ AV *padlist)
231	{	278	{
232	/* may be during global destruction */	279	/* may be during global destruction */
233	if (SvREFCNT (padlist))	280	if (SvREFCNT (padlist))
234	{	281	{
235	I32 i = AvFILLp (padlist);	282	I32 i = AvFILLp (padlist);
…		…
248		295
249	SvREFCNT_dec ((SV*)padlist);	296	SvREFCNT_dec ((SV*)padlist);
250	}	297	}
251	}	298	}
252		299
253	STATIC int	300	static int
254	coro_cv_free (SV *sv, MAGIC *mg)	301	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255	{	302	{
256	AV *padlist;	303	AV *padlist;
257	AV *av = (AV *)mg->mg_obj;	304	AV *av = (AV *)mg->mg_obj;
258		305
259	/* casting is fun. */	306	/* casting is fun. */
260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	307	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261	free_padlist (padlist);	308	free_padlist (aTHX_ padlist);
		309
		310	SvREFCNT_dec (av);
		311
		312	return 0;
262	}	313	}
263		314
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	315	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		316
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	317	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		318
		319	#define CORO_MAGIC(cv) \
		320	SvMAGIC (cv) \
		321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		322	? SvMAGIC (cv) \
		323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		324	: 0
		325
		326	static struct coro *
		327	SvSTATE_ (pTHX_ SV *coro)
		328	{
		329	HV *stash;
		330	MAGIC *mg;
		331
		332	if (SvROK (coro))
		333	coro = SvRV (coro);
		334
		335	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		336	croak ("Coro::State object required");
		337
		338	stash = SvSTASH (coro);
		339	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		340	{
		341	/* very slow, but rare, check */
		342	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		343	croak ("Coro::State object required");
		344	}
		345
		346	mg = CORO_MAGIC (coro);
		347	return (struct coro *)mg->mg_ptr;
		348	}
		349
		350	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		351
268	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
269	STATIC void	353	static void
270	get_padlist (CV *cv)	354	get_padlist (pTHX_ CV *cv)
271	{	355	{
272	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	356	MAGIC *mg = CORO_MAGIC (cv);
		357	AV *av;
273		358
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
275	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276	else	361	else
		362	{
		363	#if CORO_PREFER_PERL_FUNCTIONS
		364	/* this is probably cleaner, but also slower? */
		365	CV *cp = Perl_cv_clone (cv);
		366	CvPADLIST (cv) = CvPADLIST (cp);
		367	CvPADLIST (cp) = 0;
		368	SvREFCNT_dec (cp);
		369	#else
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		371	#endif
		372	}
278	}	373	}
279		374
280	STATIC void	375	static void
281	put_padlist (CV *cv)	376	put_padlist (pTHX_ CV *cv)
282	{	377	{
283	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	378	MAGIC *mg = CORO_MAGIC (cv);
		379	AV *av;
284		380
285	if (!mg)	381	if (expect_false (!mg))
286	{	382	{
287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289	mg->mg_virtual = &vtbl_coro;	385	mg->mg_virtual = &vtbl_coro;
290	mg->mg_obj = (SV *)newAV ();	386	mg->mg_obj = (SV *)newAV ();
291	}	387	}
292		388
293	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	389	av = (AV *)mg->mg_obj;
294	}
295		390
296	#define SB do {	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
297	#define SE } while (0)	392	av_extend (av, AvMAX (av) + 1);
298		393
299	#define LOAD(state) load_state(aTHX_ (state));	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	395	}
301		396
302	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	397	/** load & save, init *******************************************************/
303		398
304	static void	399	static void
305	load_state(pTHX_ Coro__State c)	400	load_perl (pTHX_ Coro__State c)
306	{	401	{
307	PL_dowarn = c->dowarn;	402	#define VAR(name,type) PL_ ## name = c->name;
308	PL_in_eval = c->in_eval;	403	# include "state.h"
		404	#undef VAR
309		405
310	PL_curstackinfo = c->curstackinfo;	406	GvSV (PL_defgv) = c->defsv;
311	PL_curstack = c->curstack;	407	GvAV (PL_defgv) = c->defav;
312	PL_mainstack = c->mainstack;	408	GvSV (PL_errgv) = c->errsv;
313	PL_stack_sp = c->stack_sp;	409	GvSV (irsgv) = c->irssv_sv;
314	PL_op = c->op;
315	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;
317	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;
322	PL_tmps_max = c->tmps_max;
323	PL_markstack = c->markstack;
324	PL_markstack_ptr = c->markstack_ptr;
325	PL_markstack_max = c->markstack_max;
326	PL_scopestack = c->scopestack;
327	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;
332	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;
335	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341		410
342	{	411	{
343	dSP;	412	dSP;
344	CV *cv;	413	CV *cv;
345		414
346	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
347	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
348	{	417	{
349	AV *padlist = (AV *)POPs;
350
351	if (padlist)
352	{
353	put_padlist (cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	419	CvDEPTH (cv) = PTR2IV (POPs);
355	#ifdef USE_THREADS	420	CvPADLIST (cv) = (AV *)POPs;
356	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357	#endif
358	}
359
360	++CvDEPTH(cv);
361	}	421	}
362		422
363	PUTBACK;	423	PUTBACK;
364	}	424	}
365	}	425	}
366		426
367	static void	427	static void
368	save_state(pTHX_ Coro__State c, int flags)	428	save_perl (pTHX_ Coro__State c)
369	{	429	{
370	{	430	{
371	dSP;	431	dSP;
372	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
…		…
376	/*	436	/*
377	* the worst thing you can imagine happens first - we have to save	437	* the worst thing you can imagine happens first - we have to save
378	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
379	*/	439	*/
380		440
381	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
382	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
383	for (;;)	443	for (;;)
384	{	444	{
385	while (cxix >= 0)	445	while (expect_true (cxix >= 0))
386	{	446	{
387	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
388		448
389	if (CxTYPE(cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
390	{	450	{
391	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
		452
392	if (CvDEPTH(cv))	453	if (expect_true (CvDEPTH (cv)))
393	{	454	{
394	#ifdef USE_THREADS
395	/*XPUSHs ((SV *)CvOWNER(cv));*/
396	/*CvOWNER(cv) = 0;*/
397	/*error must unlock this cv etc.. etc...*/
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	455	EXTEND (SP, 3);
400
401	while (--CvDEPTH(cv))
402	{
403	/* this tells the restore code to increment CvDEPTH */
404	PUSHs (Nullsv);
405	PUSHs ((SV *)cv);
406	}
407
408	PUSHs ((SV *)CvPADLIST(cv));	456	PUSHs ((SV *)CvPADLIST (cv));
		457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
409	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
410		459
411	get_padlist (cv); /* this is a monster */	460	CvDEPTH (cv) = 0;
		461	get_padlist (aTHX_ cv);
412	}	462	}
413	}	463	}
414	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)
416	{
417	/* I never used formats, so how should I know how these are implemented? */
418	/* my bold guess is as a simple, plain sub... */
419	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420	}
421	#endif
422	}	464	}
423		465
424	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
425	break;	467	break;
426		468
427	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
428	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
429	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
430	}	472	}
431		473
432	PUTBACK;	474	PUTBACK;
433	}	475	}
434		476
435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
		480	c->irssv_sv = GvSV (irsgv);
438		481
439	c->dowarn = PL_dowarn;	482	#define VAR(name,type)c->name = PL_ ## name;
440	c->in_eval = PL_in_eval;	483	# include "state.h"
441		484	#undef VAR
442	c->curstackinfo = PL_curstackinfo;
443	c->curstack = PL_curstack;
444	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;
446	c->op = PL_op;
447	c->curpad = PL_curpad;
448	c->comppad = PL_comppad;
449	c->stack_base = PL_stack_base;
450	c->stack_max = PL_stack_max;
451	c->tmps_stack = PL_tmps_stack;
452	c->tmps_floor = PL_tmps_floor;
453	c->tmps_ix = PL_tmps_ix;
454	c->tmps_max = PL_tmps_max;
455	c->markstack = PL_markstack;
456	c->markstack_ptr = PL_markstack_ptr;
457	c->markstack_max = PL_markstack_max;
458	c->scopestack = PL_scopestack;
459	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;
464	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;
467	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	485	}
470		486
471	/*	487	/*
472	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
474	* on the assumption that coroutines do not usually need	490	* on the (sometimes correct) assumption that coroutines do
475	* a lot of stackspace.	491	* not usually need a lot of stackspace.
476	*/	492	*/
477	STATIC void	493	#if CORO_PREFER_PERL_FUNCTIONS
		494	# define coro_init_stacks init_stacks
		495	#else
		496	static void
478	coro_init_stacks (pTHX)	497	coro_init_stacks (pTHX)
479	{	498	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	499	PL_curstackinfo = new_stackinfo(64, 6);
481	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484		503
485	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
486	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
487	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488		507
489	New(50,PL_tmps_stack,96,SV*);	508	New(50,PL_tmps_stack,64,SV*);
490	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
491	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
492	PL_tmps_max = 96;	511	PL_tmps_max = 64;
493		512
494	New(54,PL_markstack,16,I32);	513	New(54,PL_markstack,16,I32);
495	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
496	PL_markstack_max = PL_markstack + 16;	515	PL_markstack_max = PL_markstack + 16;
497		516
…		…
501		520
502	New(54,PL_scopestack,16,I32);	521	New(54,PL_scopestack,16,I32);
503	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
504	PL_scopestack_max = 16;	523	PL_scopestack_max = 16;
505		524
506	New(54,PL_savestack,96,ANY);	525	New(54,PL_savestack,64,ANY);
507	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	527	PL_savestack_max = 64;
509		528
		529	#if !PERL_VERSION_ATLEAST (5,9,0)
510	New(54,PL_retstack,8,OP*);	530	New(54,PL_retstack,4,OP*);
511	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	532	PL_retstack_max = 4;
		533	#endif
513	}	534	}
		535	#endif
514		536
515	/*	537	/*
516	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
517	*/	539	*/
518	STATIC void	540	static void
519	destroy_stacks(pTHX)	541	coro_destroy_stacks (pTHX)
520	{	542	{
521	if (!IN_DESTRUCT)
522	{
523	/* is this ugly, I ask? */
524	while (PL_scopestack_ix)
525	LEAVE;
526
527	/* sure it is, but more important: is it correct?? :/ */
528	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
529	FREETMPS;
530	}
531
532	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
533	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
534		545
535	while (PL_curstackinfo)	546	while (PL_curstackinfo)
536	{	547	{
537	PERL_SI *p = PL_curstackinfo->si_prev;	548	PERL_SI *p = PL_curstackinfo->si_prev;
538		549
539	{
540	dSP;
541	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
542	PUTBACK; /* possibly superfluous */
543	}
544
545	if (!IN_DESTRUCT)	550	if (!IN_DESTRUCT)
546	{
547	dounwind(-1);
548	SvREFCNT_dec(PL_curstackinfo->si_stack);	551	SvREFCNT_dec (PL_curstackinfo->si_stack);
549	}
550		552
551	Safefree(PL_curstackinfo->si_cxstack);	553	Safefree (PL_curstackinfo->si_cxstack);
552	Safefree(PL_curstackinfo);	554	Safefree (PL_curstackinfo);
553	PL_curstackinfo = p;	555	PL_curstackinfo = p;
554	}	556	}
555		557
556	Safefree(PL_tmps_stack);	558	Safefree (PL_tmps_stack);
557	Safefree(PL_markstack);	559	Safefree (PL_markstack);
558	Safefree(PL_scopestack);	560	Safefree (PL_scopestack);
559	Safefree(PL_savestack);	561	Safefree (PL_savestack);
		562	#if !PERL_VERSION_ATLEAST (5,9,0)
560	Safefree(PL_retstack);	563	Safefree (PL_retstack);
561	}
562
563	static void
564	allocate_stack (Coro__State ctx, int alloc)
565	{
566	coro_stack *stack;
567
568	New (0, stack, 1, coro_stack);
569
570	stack->refcnt = 1;
571	stack->usecnt = 1;
572	stack->gencnt = ctx->gencnt = 0;
573	if (alloc)
574	{
575	#if HAVE_MMAP
576	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
577	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
578	if (stack->sptr == (void *)-1)
579	#endif	564	#endif
		565	}
		566
		567	static size_t
		568	coro_rss (pTHX_ struct coro *coro)
		569	{
		570	size_t rss = sizeof (*coro);
		571
		572	if (coro->mainstack)
		573	{
		574	if (coro->flags & CF_RUNNING)
580	{	575	{
581	/*FIXME*//*D*//* reasonable stack size! */	576	#define VAR(name,type)coro->name = PL_ ## name;
582	stack->ssize = - (16384 * sizeof (long));	577	# include "state.h"
583	New (0, stack->sptr, 16384, long);	578	#undef VAR
584	}	579	}
585	}
586	else
587	stack->sptr = 0;
588		580
589	ctx->stack = stack;	581	rss += sizeof (coro->curstackinfo);
590	}	582	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		583	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		584	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		585	rss += coro->tmps_max * sizeof (SV *);
		586	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		587	rss += coro->scopestack_max * sizeof (I32);
		588	rss += coro->savestack_max * sizeof (ANY);
591		589
592	static void	590	#if !PERL_VERSION_ATLEAST (5,9,0)
593	deallocate_stack (Coro__State ctx)	591	rss += coro->retstack_max * sizeof (OP *);
594	{	592	#endif
595	coro_stack *stack = ctx->stack;
596
597	ctx->stack = 0;
598
599	if (stack)
600	{	593	}
601	if (!--stack->refcnt)
602	{
603	#ifdef HAVE_MMAP
604	if (stack->ssize > 0 && stack->sptr)
605	munmap (stack->sptr, stack->ssize);
606	else
607	#endif
608	Safefree (stack->sptr);
609		594
610	Safefree (stack);	595	return rss;
611	}
612	else if (ctx->gencnt == stack->gencnt)
613	--stack->usecnt;
614	}
615	}	596	}
616		597
		598	/** coroutine stack handling ************************************************/
		599
617	static void	600	static void
618	setup_coro (void *arg)	601	coro_setup (pTHX_ struct coro *coro)
619	{	602	{
620	/*	603	/*
621	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
622	*/	605	*/
		606	coro_init_stacks (aTHX);
		607
		608	PL_runops = RUNOPS_DEFAULT;
		609	PL_curcop = &PL_compiling;
		610	PL_in_eval = EVAL_NULL;
		611	PL_comppad = 0;
		612	PL_curpm = 0;
		613	PL_localizing = 0;
		614	PL_dirty = 0;
		615	PL_restartop = 0;
		616
		617	GvSV (PL_defgv) = newSV (0);
		618	GvAV (PL_defgv) = coro->args; coro->args = 0;
		619	GvSV (PL_errgv) = newSV (0);
		620	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		621	PL_rs = newSVsv (GvSV (irsgv));
		622	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		623
		624	ENTER; /* necessary e.g. for dounwind */
		625
		626	{
		627	dSP;
		628	LOGOP myop;
		629
		630	Zero (&myop, 1, LOGOP);
		631	myop.op_next = Nullop;
		632	myop.op_flags = OPf_WANT_VOID;
		633
		634	PUSHMARK (SP);
		635	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		636	PUTBACK;
		637	PL_op = (OP *)&myop;
		638	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		639	SPAGAIN;
		640	}
		641	}
		642
		643	static void
		644	coro_destroy (pTHX_ struct coro *coro)
		645	{
		646	if (!IN_DESTRUCT)
		647	{
		648	/* restore all saved variables and stuff */
		649	LEAVE_SCOPE (0);
		650	assert (PL_tmps_floor == -1);
		651
		652	/* free all temporaries */
		653	FREETMPS;
		654	assert (PL_tmps_ix == -1);
		655
		656	/* unwind all extra stacks */
		657	POPSTACK_TO (PL_mainstack);
		658
		659	/* unwind main stack */
		660	dounwind (-1);
		661	}
		662
		663	SvREFCNT_dec (GvSV (PL_defgv));
		664	SvREFCNT_dec (GvAV (PL_defgv));
		665	SvREFCNT_dec (GvSV (PL_errgv));
		666	SvREFCNT_dec (PL_defoutgv);
		667	SvREFCNT_dec (PL_rs);
		668	SvREFCNT_dec (GvSV (irsgv));
		669
		670	SvREFCNT_dec (coro->saved_deffh);
		671	//SvREFCNT_dec (coro->throw);
		672
		673	coro_destroy_stacks (aTHX);
		674	}
		675
		676	static void
		677	free_coro_mortal (pTHX)
		678	{
		679	if (expect_true (coro_mortal))
		680	{
		681	SvREFCNT_dec (coro_mortal);
		682	coro_mortal = 0;
		683	}
		684	}
		685
		686	static int
		687	runops_trace (pTHX)
		688	{
		689	COP *oldcop = 0;
		690	int oldcxix = -2;
		691	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		692	coro_cctx *cctx = coro->cctx;
		693
		694	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		695	{
		696	PERL_ASYNC_CHECK ();
		697
		698	if (cctx->flags & CC_TRACE_ALL)
		699	{
		700	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		701	{
		702	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		703	SV **bot, **top;
		704	AV *av = newAV (); /* return values */
		705	SV **cb;
		706	dSP;
		707
		708	GV *gv = CvGV (cx->blk_sub.cv);
		709	SV *fullname = sv_2mortal (newSV (0));
		710	if (isGV (gv))
		711	gv_efullname3 (fullname, gv, 0);
		712
		713	bot = PL_stack_base + cx->blk_oldsp + 1;
		714	top = cx->blk_gimme == G_ARRAY ? SP + 1
		715	: cx->blk_gimme == G_SCALAR ? bot + 1
		716	: bot;
		717
		718	av_extend (av, top - bot);
		719	while (bot < top)
		720	av_push (av, SvREFCNT_inc (*bot++));
		721
		722	PL_runops = RUNOPS_DEFAULT;
		723	ENTER;
		724	SAVETMPS;
		725	EXTEND (SP, 3);
		726	PUSHMARK (SP);
		727	PUSHs (&PL_sv_no);
		728	PUSHs (fullname);
		729	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		730	PUTBACK;
		731	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		732	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		733	SPAGAIN;
		734	FREETMPS;
		735	LEAVE;
		736	PL_runops = runops_trace;
		737	}
		738
		739	if (oldcop != PL_curcop)
		740	{
		741	oldcop = PL_curcop;
		742
		743	if (PL_curcop != &PL_compiling)
		744	{
		745	SV **cb;
		746
		747	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		748	{
		749	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		750
		751	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		752	{
		753	runops_proc_t old_runops = PL_runops;
		754	dSP;
		755	GV *gv = CvGV (cx->blk_sub.cv);
		756	SV *fullname = sv_2mortal (newSV (0));
		757
		758	if (isGV (gv))
		759	gv_efullname3 (fullname, gv, 0);
		760
		761	PL_runops = RUNOPS_DEFAULT;
		762	ENTER;
		763	SAVETMPS;
		764	EXTEND (SP, 3);
		765	PUSHMARK (SP);
		766	PUSHs (&PL_sv_yes);
		767	PUSHs (fullname);
		768	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		769	PUTBACK;
		770	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		771	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		772	SPAGAIN;
		773	FREETMPS;
		774	LEAVE;
		775	PL_runops = runops_trace;
		776	}
		777
		778	oldcxix = cxstack_ix;
		779	}
		780
		781	if (cctx->flags & CC_TRACE_LINE)
		782	{
		783	dSP;
		784
		785	PL_runops = RUNOPS_DEFAULT;
		786	ENTER;
		787	SAVETMPS;
		788	EXTEND (SP, 3);
		789	PL_runops = RUNOPS_DEFAULT;
		790	PUSHMARK (SP);
		791	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		792	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		793	PUTBACK;
		794	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		795	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		796	SPAGAIN;
		797	FREETMPS;
		798	LEAVE;
		799	PL_runops = runops_trace;
		800	}
		801	}
		802	}
		803	}
		804	}
		805
		806	TAINT_NOT;
		807	return 0;
		808	}
		809
		810	/* inject a fake call to Coro::State::_cctx_init into the execution */
		811	/* _cctx_init should be careful, as it could be called at almost any time */
		812	/* during execution of a perl program */
		813	static void NOINLINE
		814	prepare_cctx (pTHX_ coro_cctx *cctx)
		815	{
623	dSP;	816	dSP;
624	Coro__State ctx = (Coro__State)arg;	817	LOGOP myop;
625	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
626		818
627	coro_init_stacks (aTHX);	819	PL_top_env = &PL_start_env;
628	/*PL_curcop = 0;*/
629	/*PL_in_eval = PL_in_eval;*/ /* inherit */
630	SvREFCNT_dec (GvAV (PL_defgv));
631	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
632		820
		821	if (cctx->flags & CC_TRACE)
		822	PL_runops = runops_trace;
		823
		824	Zero (&myop, 1, LOGOP);
		825	myop.op_next = PL_op;
		826	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		827
		828	PUSHMARK (SP);
		829	EXTEND (SP, 2);
		830	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		831	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		832	PUTBACK;
		833	PL_op = (OP *)&myop;
		834	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
633	SPAGAIN;	835	SPAGAIN;
		836	}
634		837
635	if (ctx->stack)	838	/*
636	{	839	* this is a _very_ stripped down perl interpreter ;)
637	ctx->cursp = 0;	840	*/
		841	static void
		842	coro_run (void *arg)
		843	{
		844	dTHX;
638		845
639	PUSHMARK(SP);	846	/* coro_run is the alternative tail of transfer(), so unlock here. */
640	PUTBACK;	847	UNLOCK;
641	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
642		848
643	if (SvTRUE (ERRSV))	849	/* we now skip the entersub that lead to transfer() */
644	croak (NULL);	850	PL_op = PL_op->op_next;
645	else	851
646	croak ("FATAL: CCTXT coroutine returned!");	852	/* inject a fake subroutine call to cctx_init */
		853	prepare_cctx (aTHX_ (coro_cctx *)arg);
		854
		855	/* somebody or something will hit me for both perl_run and PL_restartop */
		856	PL_restartop = PL_op;
		857	perl_run (PL_curinterp);
		858
		859	/*
		860	* If perl-run returns we assume exit() was being called or the coro
		861	* fell off the end, which seems to be the only valid (non-bug)
		862	* reason for perl_run to return. We try to exit by jumping to the
		863	* bootstrap-time "top" top_env, as we cannot restore the "main"
		864	* coroutine as Coro has no such concept
		865	*/
		866	PL_top_env = main_top_env;
		867	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		868	}
		869
		870	static coro_cctx *
		871	cctx_new ()
		872	{
		873	coro_cctx *cctx;
		874	void *stack_start;
		875	size_t stack_size;
		876
		877	++cctx_count;
		878
		879	Newz (0, cctx, 1, coro_cctx);
		880
		881	#if HAVE_MMAP
		882
		883	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		884	/* mmap supposedly does allocate-on-write for us */
		885	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		886
		887	if (cctx->sptr != (void *)-1)
		888	{
		889	# if CORO_STACKGUARD
		890	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		891	# endif
		892	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		893	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		894	cctx->flags |= CC_MAPPED;
647	}	895	}
648	else	896	else
649	{	897	#endif
650	UNOP myop;
651
652	PL_op = (OP *)&myop;
653
654	Zero(&myop, 1, UNOP);
655	myop.op_next = Nullop;
656	myop.op_flags = OPf_WANT_VOID;
657
658	PUSHMARK(SP);
659	XPUSHs (sub_init);
660	/*
661	* the next line is slightly wrong, as PL_op->op_next
662	* is actually being executed so we skip the first op.
663	* that doesn't matter, though, since it is only
664	* pp_nextstate and we never return...
665	* ah yes, and I don't care anyways ;)
666	*/
667	PUTBACK;
668	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
669	SPAGAIN;
670
671	ENTER; /* necessary e.g. for dounwind */
672	}	898	{
673	}	899	cctx->ssize = coro_stacksize * (long)sizeof (long);
		900	New (0, cctx->sptr, coro_stacksize, long);
674		901
675	static void	902	if (!cctx->sptr)
676	continue_coro (void *arg)	903	{
677	{	904	perror ("FATAL: unable to allocate stack for coroutine");
678	/*	905	_exit (EXIT_FAILURE);
679	* this is a _very_ stripped down perl interpreter ;)	906	}
680	*/
681	Coro__State ctx = (Coro__State)arg;
682	JMPENV coro_start_env;
683		907
684	PL_top_env = &ctx->start_env;	908	stack_start = cctx->sptr;
		909	stack_size = cctx->ssize;
		910	}
685		911
686	ctx->cursp = 0;	912	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
687	PL_op = PL_op->op_next;	913	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
688	CALLRUNOPS(aTHX);
689		914
690	abort ();	915	return cctx;
691	}	916	}
692		917
693	STATIC void	918	static void
		919	cctx_destroy (coro_cctx *cctx)
		920	{
		921	if (!cctx)
		922	return;
		923
		924	--cctx_count;
		925
		926	#if CORO_USE_VALGRIND
		927	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		928	#endif
		929
		930	#if HAVE_MMAP
		931	if (cctx->flags & CC_MAPPED)
		932	munmap (cctx->sptr, cctx->ssize);
		933	else
		934	#endif
		935	Safefree (cctx->sptr);
		936
		937	Safefree (cctx);
		938	}
		939
		940	/* wether this cctx should be destructed */
		941	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		942
		943	static coro_cctx *
		944	cctx_get (pTHX)
		945	{
		946	while (expect_true (cctx_first))
		947	{
		948	coro_cctx *cctx = cctx_first;
		949	cctx_first = cctx->next;
		950	--cctx_idle;
		951
		952	if (expect_true (!CCTX_EXPIRED (cctx)))
		953	return cctx;
		954
		955	cctx_destroy (cctx);
		956	}
		957
		958	return cctx_new ();
		959	}
		960
		961	static void
		962	cctx_put (coro_cctx *cctx)
		963	{
		964	/* free another cctx if overlimit */
		965	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		966	{
		967	coro_cctx *first = cctx_first;
		968	cctx_first = first->next;
		969	--cctx_idle;
		970
		971	cctx_destroy (first);
		972	}
		973
		974	++cctx_idle;
		975	cctx->next = cctx_first;
		976	cctx_first = cctx;
		977	}
		978
		979	/** coroutine switching *****************************************************/
		980
		981	static void
		982	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		983	{
		984	if (expect_true (prev != next))
		985	{
		986	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		987	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		988
		989	if (expect_false (next->flags & CF_RUNNING))
		990	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		991
		992	if (expect_false (next->flags & CF_DESTROYED))
		993	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		994
		995	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		996	croak ("Coro::State::transfer called while parsing, but this is not supported");
		997	}
		998	}
		999
		1000	/* always use the TRANSFER macro */
		1001	static void NOINLINE
694	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	1002	transfer (pTHX_ struct coro *prev, struct coro *next)
695	{	1003	{
696	dSTACKLEVEL;	1004	dSTACKLEVEL;
697	static struct coro *xnext;
698		1005
699	if (prev != next)	1006	/* sometimes transfer is only called to set idle_sp */
		1007	if (expect_false (!next))
		1008	{
		1009	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1010	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
700	{	1011	}
701	xnext = next;	1012	else if (expect_true (prev != next))
		1013	{
		1014	coro_cctx *prev__cctx;
702		1015
703	if (next->mainstack)	1016	if (expect_false (prev->flags & CF_NEW))
704	{	1017	{
705	SAVE (prev, flags);	1018	/* create a new empty context */
706	LOAD (next);	1019	Newz (0, prev->cctx, 1, coro_cctx);
707		1020	prev->flags &= ~CF_NEW;
708	/* mark this state as in-use */	1021	prev->flags |= CF_RUNNING;
709	next->mainstack = 0;
710	next->tmps_ix = -2;
711
712	/* stacklevel changed? if yes, grab the stack for us! */
713	if (flags & TRANSFER_SAVE_CCTXT)
714	{
715	if (!prev->stack)
716	allocate_stack (prev, 0);
717	else if (prev->cursp != stacklevel
718	&& prev->stack->usecnt > 1)
719	{
720	prev->gencnt = ++prev->stack->gencnt;
721	prev->stack->usecnt = 1;
722	}
723
724	/* has our stack been invalidated? */
725	if (next->stack && next->stack->gencnt != next->gencnt)
726	{
727	deallocate_stack (next);
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	continue_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	}
733
734	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
735	/* don't add any code here */
736	}
737
738	}	1022	}
739	else if (next->tmps_ix == -2)	1023
740	croak ("tried to transfer to running coroutine");	1024	prev->flags &= ~CF_RUNNING;
		1025	next->flags |= CF_RUNNING;
		1026
		1027	LOCK;
		1028
		1029	if (expect_false (next->flags & CF_NEW))
		1030	{
		1031	/* need to start coroutine */
		1032	next->flags &= ~CF_NEW;
		1033	/* first get rid of the old state */
		1034	save_perl (aTHX_ prev);
		1035	/* setup coroutine call */
		1036	coro_setup (aTHX_ next);
		1037	}
741	else	1038	else
742	{	1039	{
743	SAVE (prev, -1); /* first get rid of the old state */	1040	/* coroutine already started */
744		1041	save_perl (aTHX_ prev);
745	if (flags & TRANSFER_SAVE_CCTXT)	1042	load_perl (aTHX_ next);
746	{
747	if (!prev->stack)
748	allocate_stack (prev, 0);
749
750	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
751	{
752	PL_top_env = &next->start_env;
753
754	setup_coro (next);
755
756	prev->stack->refcnt++;
757	prev->stack->usecnt++;
758	next->stack = prev->stack;
759	next->gencnt = prev->gencnt;
760	}
761	else
762	{
763	assert (!next->stack);
764	allocate_stack (next, 1);
765	coro_create (&(next->stack->cctx),
766	setup_coro, (void *)next,
767	next->stack->sptr, labs (next->stack->ssize));
768	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
769	/* don't add any code here */
770	}
771	}
772	else
773	setup_coro (next);
774	}	1043	}
775		1044
776	/*	1045	prev__cctx = prev->cctx;
777	* xnext is now either prev or next, depending on wether	1046
778	* we switched the c stack or not. that's why I use a global	1047	/* possibly "free" the cctx */
779	* variable, that should become thread-specific at one point.	1048	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
780	*/	1049	{
781	xnext->cursp = stacklevel;	1050	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
782	}	1051	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
783		1052
784	if (coro_mortal)	1053	prev->cctx = 0;
		1054
		1055	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1056	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1057	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1058	next->cctx = cctx_get (aTHX);
		1059
		1060	cctx_put (prev__cctx);
		1061	}
		1062
		1063	++next->usecount;
		1064
		1065	if (expect_true (!next->cctx))
		1066	next->cctx = cctx_get (aTHX);
		1067
		1068	if (expect_false (prev__cctx != next->cctx))
		1069	{
		1070	prev__cctx->top_env = PL_top_env;
		1071	PL_top_env = next->cctx->top_env;
		1072	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1073	}
		1074
		1075	free_coro_mortal (aTHX);
		1076	UNLOCK;
785	{	1077	}
786	SvREFCNT_dec (coro_mortal);	1078	}
787	coro_mortal = 0;	1079
		1080	struct transfer_args
		1081	{
		1082	struct coro *prev, *next;
		1083	};
		1084
		1085	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1086	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1087
		1088	/** high level stuff ********************************************************/
		1089
		1090	static int
		1091	coro_state_destroy (pTHX_ struct coro *coro)
		1092	{
		1093	if (coro->flags & CF_DESTROYED)
		1094	return 0;
		1095
		1096	coro->flags |= CF_DESTROYED;
		1097
		1098	if (coro->flags & CF_READY)
788	}	1099	{
789	}	1100	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1101	/* alternative: look through all ready queues and remove the coro */
		1102	LOCK;
		1103	--coro_nready;
		1104	UNLOCK;
		1105	}
		1106	else
		1107	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		1108
791	#define SV_CORO(sv,func) \	1109	if (coro->mainstack && coro->mainstack != main_mainstack)
792	do { \	1110	{
793	if (SvROK (sv)) \	1111	struct coro temp;
794	sv = SvRV (sv); \
795	\
796	if (SvTYPE(sv) == SVt_PVHV) \
797	{ \
798	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
799	\
800	if (!he) \
801	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
802	\
803	(sv) = SvRV (HeVAL(he)); \
804	} \
805	\
806	/* must also be changed inside Coro::Cont::yield */ \
807	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
808	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
809	\
810	} while(0)
811		1112
812	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1113	if (coro->flags & CF_RUNNING)
		1114	croak ("FATAL: tried to destroy currently running coroutine");
813		1115
		1116	save_perl (aTHX_ &temp);
		1117	load_perl (aTHX_ coro);
		1118
		1119	coro_destroy (aTHX_ coro);
		1120
		1121	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1122
		1123	coro->mainstack = 0;
		1124	}
		1125
		1126	cctx_destroy (coro->cctx);
		1127	SvREFCNT_dec (coro->args);
		1128
		1129	if (coro->next) coro->next->prev = coro->prev;
		1130	if (coro->prev) coro->prev->next = coro->next;
		1131	if (coro == coro_first) coro_first = coro->next;
		1132
		1133	return 1;
		1134	}
		1135
814	static void	1136	static int
		1137	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1138	{
		1139	struct coro *coro = (struct coro *)mg->mg_ptr;
		1140	mg->mg_ptr = 0;
		1141
		1142	coro->hv = 0;
		1143
		1144	if (--coro->refcnt < 0)
		1145	{
		1146	coro_state_destroy (aTHX_ coro);
		1147	Safefree (coro);
		1148	}
		1149
		1150	return 0;
		1151	}
		1152
		1153	static int
		1154	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1155	{
		1156	struct coro *coro = (struct coro *)mg->mg_ptr;
		1157
		1158	++coro->refcnt;
		1159
		1160	return 0;
		1161	}
		1162
		1163	static MGVTBL coro_state_vtbl = {
		1164	0, 0, 0, 0,
		1165	coro_state_free,
		1166	0,
		1167	#ifdef MGf_DUP
		1168	coro_state_dup,
		1169	#else
		1170	# define MGf_DUP 0
		1171	#endif
		1172	};
		1173
		1174	static void
		1175	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1176	{
		1177	ta->prev = SvSTATE (prev_sv);
		1178	ta->next = SvSTATE (next_sv);
		1179	TRANSFER_CHECK (*ta);
		1180	}
		1181
		1182	static void
815	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1183	api_transfer (SV *prev_sv, SV *next_sv)
816	{	1184	{
817	SV_CORO (prev, "Coro::transfer");	1185	dTHX;
818	SV_CORO (next, "Coro::transfer");	1186	struct transfer_args ta;
819		1187
820	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1188	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1189	TRANSFER (ta);
821	}	1190	}
822		1191
823	/** Coro ********************************************************************/	1192	/** Coro ********************************************************************/
824		1193
825	#define PRIO_MAX 3
826	#define PRIO_HIGH 1
827	#define PRIO_NORMAL 0
828	#define PRIO_LOW -1
829	#define PRIO_IDLE -3
830	#define PRIO_MIN -4
831
832	/* for Coro.pm */
833	static GV *coro_current, *coro_idle;
834	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
835	static int coro_nready;
836
837	static void	1194	static void
838	coro_enq (SV *sv)	1195	coro_enq (pTHX_ SV *coro_sv)
839	{	1196	{
840	if (SvTYPE (sv) == SVt_PVHV)
841	{
842	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
843	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
844
845	prio = prio > PRIO_MAX ? PRIO_MAX
846	: prio < PRIO_MIN ? PRIO_MIN
847	: prio;
848
849	av_push (coro_ready [prio - PRIO_MIN], sv);	1197	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
850	coro_nready++;
851
852	return;
853	}
854
855	croak ("Coro::ready tried to enqueue something that is not a coroutine");
856	}	1198	}
857		1199
858	static SV *	1200	static SV *
859	coro_deq (int min_prio)	1201	coro_deq (pTHX_ int min_prio)
860	{	1202	{
861	int prio = PRIO_MAX - PRIO_MIN;	1203	int prio = PRIO_MAX - PRIO_MIN;
862		1204
863	min_prio -= PRIO_MIN;	1205	min_prio -= PRIO_MIN;
864	if (min_prio < 0)	1206	if (min_prio < 0)
865	min_prio = 0;	1207	min_prio = 0;
866		1208
867	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1209	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
868	if (av_len (coro_ready[prio]) >= 0)	1210	if (AvFILLp (coro_ready [prio]) >= 0)
869	{
870	coro_nready--;
871	return av_shift (coro_ready[prio]);	1211	return av_shift (coro_ready [prio]);
872	}
873		1212
874	return 0;	1213	return 0;
875	}	1214	}
876		1215
877	static void	1216	static int
878	api_ready (SV *coro)	1217	api_ready (SV *coro_sv)
879	{	1218	{
		1219	dTHX;
		1220	struct coro *coro;
		1221
880	if (SvROK (coro))	1222	if (SvROK (coro_sv))
881	coro = SvRV (coro);	1223	coro_sv = SvRV (coro_sv);
882		1224
		1225	coro = SvSTATE (coro_sv);
		1226
		1227	if (coro->flags & CF_READY)
		1228	return 0;
		1229
		1230	coro->flags |= CF_READY;
		1231
		1232	LOCK;
883	coro_enq (SvREFCNT_inc (coro));	1233	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1234	++coro_nready;
		1235	UNLOCK;
		1236
		1237	return 1;
		1238	}
		1239
		1240	static int
		1241	api_is_ready (SV *coro_sv)
		1242	{
		1243	dTHX;
		1244	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1245	}
		1246
		1247	static void
		1248	prepare_schedule (pTHX_ struct transfer_args *ta)
		1249	{
		1250	SV *prev_sv, *next_sv;
		1251
		1252	for (;;)
		1253	{
		1254	LOCK;
		1255	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1256
		1257	/* nothing to schedule: call the idle handler */
		1258	if (expect_false (!next_sv))
		1259	{
		1260	dSP;
		1261	UNLOCK;
		1262
		1263	ENTER;
		1264	SAVETMPS;
		1265
		1266	PUSHMARK (SP);
		1267	PUTBACK;
		1268	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1269
		1270	FREETMPS;
		1271	LEAVE;
		1272	continue;
		1273	}
		1274
		1275	ta->next = SvSTATE (next_sv);
		1276
		1277	/* cannot transfer to destroyed coros, skip and look for next */
		1278	if (expect_false (ta->next->flags & CF_DESTROYED))
		1279	{
		1280	UNLOCK;
		1281	SvREFCNT_dec (next_sv);
		1282	/* coro_nready is already taken care of by destroy */
		1283	continue;
		1284	}
		1285
		1286	--coro_nready;
		1287	UNLOCK;
		1288	break;
		1289	}
		1290
		1291	/* free this only after the transfer */
		1292	prev_sv = SvRV (coro_current);
		1293	ta->prev = SvSTATE (prev_sv);
		1294	TRANSFER_CHECK (*ta);
		1295	assert (ta->next->flags & CF_READY);
		1296	ta->next->flags &= ~CF_READY;
		1297	SvRV_set (coro_current, next_sv);
		1298
		1299	LOCK;
		1300	free_coro_mortal (aTHX);
		1301	coro_mortal = prev_sv;
		1302	UNLOCK;
		1303	}
		1304
		1305	static void
		1306	prepare_cede (pTHX_ struct transfer_args *ta)
		1307	{
		1308	api_ready (coro_current);
		1309	prepare_schedule (aTHX_ ta);
		1310	}
		1311
		1312	static int
		1313	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1314	{
		1315	if (coro_nready)
		1316	{
		1317	SV *prev = SvRV (coro_current);
		1318	prepare_schedule (aTHX_ ta);
		1319	api_ready (prev);
		1320	return 1;
		1321	}
		1322	else
		1323	return 0;
884	}	1324	}
885		1325
886	static void	1326	static void
887	api_schedule (void)	1327	api_schedule (void)
888	{	1328	{
889	SV *prev, *next;	1329	dTHX;
		1330	struct transfer_args ta;
890		1331
891	prev = SvRV (GvSV (coro_current));	1332	prepare_schedule (aTHX_ &ta);
892	next = coro_deq (PRIO_MIN);	1333	TRANSFER (ta);
893
894	if (!next)
895	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
896
897	/* free this only after the transfer */
898	coro_mortal = prev;
899	SV_CORO (prev, "Coro::schedule");
900
901	SvRV (GvSV (coro_current)) = next;
902
903	SV_CORO (next, "Coro::schedule");
904
905	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
906	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
907	}	1334	}
908		1335
909	static void	1336	static int
910	api_cede (void)	1337	api_cede (void)
911	{	1338	{
912	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1339	dTHX;
		1340	struct transfer_args ta;
913		1341
914	api_schedule ();	1342	prepare_cede (aTHX_ &ta);
915	}
916		1343
		1344	if (expect_true (ta.prev != ta.next))
		1345	{
		1346	TRANSFER (ta);
		1347	return 1;
		1348	}
		1349	else
		1350	return 0;
		1351	}
		1352
		1353	static int
		1354	api_cede_notself (void)
		1355	{
		1356	dTHX;
		1357	struct transfer_args ta;
		1358
		1359	if (prepare_cede_notself (aTHX_ &ta))
		1360	{
		1361	TRANSFER (ta);
		1362	return 1;
		1363	}
		1364	else
		1365	return 0;
		1366	}
		1367
		1368	static void
		1369	api_trace (SV *coro_sv, int flags)
		1370	{
		1371	dTHX;
		1372	struct coro *coro = SvSTATE (coro_sv);
		1373
		1374	if (flags & CC_TRACE)
		1375	{
		1376	if (!coro->cctx)
		1377	coro->cctx = cctx_new ();
		1378	else if (!(coro->cctx->flags & CC_TRACE))
		1379	croak ("cannot enable tracing on coroutine with custom stack");
		1380
		1381	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1382	}
		1383	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1384	{
		1385	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1386
		1387	if (coro->flags & CF_RUNNING)
		1388	PL_runops = RUNOPS_DEFAULT;
		1389	else
		1390	coro->runops = RUNOPS_DEFAULT;
		1391	}
		1392	}
		1393
917	MODULE = Coro::State PACKAGE = Coro::State	1394	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
918		1395
919	PROTOTYPES: ENABLE	1396	PROTOTYPES: DISABLE
920		1397
921	BOOT:	1398	BOOT:
922	{ /* {} necessary for stoopid perl-5.6.x */	1399	{
923	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1400	#ifdef USE_ITHREADS
924	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1401	MUTEX_INIT (&coro_mutex);
		1402	#endif
		1403	BOOT_PAGESIZE;
		1404
		1405	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1406	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1407
925	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1408	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
926		1409
927	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1410	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
928	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1411	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
929	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1412	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
930	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1413	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
931
932	if (!padlist_cache)
933	padlist_cache = newHV ();
934		1414
935	main_mainstack = PL_mainstack;	1415	main_mainstack = PL_mainstack;
		1416	main_top_env = PL_top_env;
		1417
		1418	while (main_top_env->je_prev)
		1419	main_top_env = main_top_env->je_prev;
936		1420
937	coroapi.ver = CORO_API_VERSION;	1421	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1422	coroapi.transfer = api_transfer;
939	}
940		1423
941	Coro::State	1424	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1425	}
943	SV * args	1426
944	PROTOTYPE: $	1427	SV *
		1428	new (char *klass, ...)
945	CODE:	1429	CODE:
946	Coro__State coro;	1430	{
		1431	struct coro *coro;
		1432	HV *hv;
		1433	int i;
947		1434
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1435	Newz (0, coro, 1, struct coro);
		1436	coro->args = newAV ();
		1437	coro->flags = CF_NEW;
952		1438
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1439	if (coro_first) coro_first->prev = coro;
954	coro->mainstack = 0; /* actual work is done inside transfer */	1440	coro->next = coro_first;
955	coro->stack = 0;	1441	coro_first = coro;
956		1442
957	/* same as JMPENV_BOOTSTRAP */	1443	coro->hv = hv = newHV ();
958	/* we might be able to recycle start_env, but safe is safe */	1444	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
959	//Zero(&coro->start_env, 1, JMPENV);	1445	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962		1446
963	RETVAL = coro;	1447	av_extend (coro->args, items - 1);
		1448	for (i = 1; i < items; i++)
		1449	av_push (coro->args, newSVsv (ST (i)));
		1450	}
964	OUTPUT:	1451	OUTPUT:
965	RETVAL	1452	RETVAL
966		1453
		1454	# these not obviously related functions are all rolled into the same xs
		1455	# function to increase chances that they all will call transfer with the same
		1456	# stack offset
967	void	1457	void
968	transfer(prev, next, flags)	1458	_set_stacklevel (...)
969	SV *prev	1459	ALIAS:
970	SV *next	1460	Coro::State::transfer = 1
971	int flags	1461	Coro::schedule = 2
972	PROTOTYPE: @	1462	Coro::cede = 3
		1463	Coro::cede_notself = 4
973	CODE:	1464	CODE:
974	PUTBACK;	1465	{
975	SV_CORO (next, "Coro::transfer");	1466	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1467
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1468	switch (ix)
978	SPAGAIN;	1469	{
		1470	case 0:
		1471	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1472	ta.next = 0;
		1473	break;
		1474
		1475	case 1:
		1476	if (items != 2)
		1477	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1478
		1479	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1480	break;
		1481
		1482	case 2:
		1483	prepare_schedule (aTHX_ &ta);
		1484	break;
		1485
		1486	case 3:
		1487	prepare_cede (aTHX_ &ta);
		1488	break;
		1489
		1490	case 4:
		1491	if (!prepare_cede_notself (aTHX_ &ta))
		1492	XSRETURN_EMPTY;
		1493
		1494	break;
		1495	}
		1496
		1497	BARRIER;
		1498	TRANSFER (ta);
		1499
		1500	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1501	XSRETURN_YES;
		1502	}
		1503
		1504	bool
		1505	_destroy (SV *coro_sv)
		1506	CODE:
		1507	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1508	OUTPUT:
		1509	RETVAL
979		1510
980	void	1511	void
981	DESTROY(coro)
982	Coro::State coro
983	CODE:
984
985	if (coro->mainstack && coro->mainstack != main_mainstack)
986	{
987	struct coro temp;
988
989	PUTBACK;
990	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
991	LOAD(aTHX_ coro);
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005
1006	void
1007	_exit(code)	1512	_exit (code)
1008	int code	1513	int code
1009	PROTOTYPE: $	1514	PROTOTYPE: $
1010	CODE:	1515	CODE:
1011	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1012	_exit (code);	1516	_exit (code);
1013	#else
1014	signal (SIGTERM, SIG_DFL);
1015	raise (SIGTERM);
1016	exit (code);
1017	#endif
1018		1517
1019	MODULE = Coro::State PACKAGE = Coro::Cont	1518	int
		1519	cctx_stacksize (int new_stacksize = 0)
		1520	CODE:
		1521	RETVAL = coro_stacksize;
		1522	if (new_stacksize)
		1523	coro_stacksize = new_stacksize;
		1524	OUTPUT:
		1525	RETVAL
1020		1526
1021	# this is slightly dirty (should expose a c-level api)	1527	int
		1528	cctx_count ()
		1529	CODE:
		1530	RETVAL = cctx_count;
		1531	OUTPUT:
		1532	RETVAL
		1533
		1534	int
		1535	cctx_idle ()
		1536	CODE:
		1537	RETVAL = cctx_idle;
		1538	OUTPUT:
		1539	RETVAL
1022		1540
1023	void	1541	void
1024	yield(...)	1542	list ()
1025	PROTOTYPE: @	1543	PPCODE:
		1544	{
		1545	struct coro *coro;
		1546	for (coro = coro_first; coro; coro = coro->next)
		1547	if (coro->hv)
		1548	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1549	}
		1550
		1551	void
		1552	call (Coro::State coro, SV *coderef)
		1553	ALIAS:
		1554	eval = 1
		1555	CODE:
		1556	{
		1557	if (coro->mainstack)
		1558	{
		1559	struct coro temp;
		1560	Zero (&temp, 1, struct coro);
		1561
		1562	if (!(coro->flags & CF_RUNNING))
		1563	{
		1564	save_perl (aTHX_ &temp);
		1565	load_perl (aTHX_ coro);
		1566	}
		1567
		1568	{
		1569	dSP;
		1570	ENTER;
		1571	SAVETMPS;
		1572	PUSHMARK (SP);
		1573	PUTBACK;
		1574	if (ix)
		1575	eval_sv (coderef, 0);
		1576	else
		1577	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1578	SPAGAIN;
		1579	FREETMPS;
		1580	LEAVE;
		1581	PUTBACK;
		1582	}
		1583
		1584	if (!(coro->flags & CF_RUNNING))
		1585	{
		1586	save_perl (aTHX_ coro);
		1587	load_perl (aTHX_ &temp);
		1588	}
		1589	}
		1590	}
		1591
		1592	SV *
		1593	is_ready (Coro::State coro)
		1594	PROTOTYPE: $
		1595	ALIAS:
		1596	is_ready = CF_READY
		1597	is_running = CF_RUNNING
		1598	is_new = CF_NEW
		1599	is_destroyed = CF_DESTROYED
		1600	CODE:
		1601	RETVAL = boolSV (coro->flags & ix);
		1602	OUTPUT:
		1603	RETVAL
		1604
		1605	void
		1606	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1607
		1608	SV *
		1609	has_stack (Coro::State coro)
		1610	PROTOTYPE: $
		1611	CODE:
		1612	RETVAL = boolSV (!!coro->cctx);
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	int
		1617	is_traced (Coro::State coro)
		1618	PROTOTYPE: $
		1619	CODE:
		1620	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	IV
		1625	rss (Coro::State coro)
		1626	PROTOTYPE: $
		1627	ALIAS:
		1628	usecount = 1
1026	CODE:	1629	CODE:
1027	static SV *returnstk;	1630	switch (ix)
1028	SV *sv;	1631	{
1029	AV *defav = GvAV (PL_defgv);	1632	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1030	struct coro *prev, *next;	1633	case 1: RETVAL = coro->usecount; break;
		1634	}
		1635	OUTPUT:
		1636	RETVAL
1031		1637
1032	if (!returnstk)
1033	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1034
1035	/* set up @_ -- ugly */
1036	av_clear (defav);
1037	av_fill (defav, items - 1);
1038	while (items--)
1039	av_store (defav, items, SvREFCNT_inc (ST(items)));
1040
1041	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1042	sv = av_pop ((AV *)SvRV (returnstk));
1043	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1044	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1045	SvREFCNT_dec (sv);
1046
1047	transfer(aTHX_ prev, next, 0);
1048		1638
1049	MODULE = Coro::State PACKAGE = Coro	1639	MODULE = Coro::State PACKAGE = Coro
1050		1640
1051	# this is slightly dirty (should expose a c-level api)
1052
1053	BOOT:	1641	BOOT:
1054	{	1642	{
1055	int i;	1643	int i;
		1644
		1645	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1646	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1647	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1648
		1649	coro_current = get_sv ("Coro::current", FALSE);
		1650	SvREADONLY_on (coro_current);
		1651
1056	HV *stash = gv_stashpv ("Coro", TRUE);	1652	coro_stash = gv_stashpv ("Coro", TRUE);
1057		1653
1058	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1654	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1059	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1655	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1060	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1656	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1061	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1657	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1062	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1658	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1063	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1659	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1064
1065	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1066	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1067		1660
1068	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1661	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1069	coro_ready[i] = newAV ();	1662	coro_ready[i] = newAV ();
1070		1663
1071	{	1664	{
1072	SV *sv = perl_get_sv("Coro::API", 1);	1665	SV *sv = perl_get_sv("Coro::API", 1);
1073		1666
1074	coroapi.schedule = api_schedule;	1667	coroapi.schedule = api_schedule;
1075	coroapi.cede = api_cede;	1668	coroapi.cede = api_cede;
		1669	coroapi.cede_notself = api_cede_notself;
1076	coroapi.ready = api_ready;	1670	coroapi.ready = api_ready;
		1671	coroapi.is_ready = api_is_ready;
1077	coroapi.nready = &coro_nready;	1672	coroapi.nready = &coro_nready;
1078	coroapi.current = coro_current;	1673	coroapi.current = coro_current;
1079		1674
1080	GCoroAPI = &coroapi;	1675	GCoroAPI = &coroapi;
1081	sv_setiv(sv, (IV)&coroapi);	1676	sv_setiv (sv, (IV)&coroapi);
1082	SvREADONLY_on(sv);	1677	SvREADONLY_on (sv);
1083	}	1678	}
1084	}	1679	}
1085		1680
1086	#if !PERL_MICRO
1087
1088	void	1681	void
1089	ready(self)	1682	_set_current (SV *current)
1090	SV * self
1091	PROTOTYPE: $	1683	PROTOTYPE: $
1092	CODE:	1684	CODE:
1093	api_ready (self);	1685	SvREFCNT_dec (SvRV (coro_current));
1094		1686	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1095	#endif
1096		1687
1097	int	1688	int
		1689	prio (Coro::State coro, int newprio = 0)
		1690	ALIAS:
		1691	nice = 1
		1692	CODE:
		1693	{
		1694	RETVAL = coro->prio;
		1695
		1696	if (items > 1)
		1697	{
		1698	if (ix)
		1699	newprio = coro->prio - newprio;
		1700
		1701	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1702	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1703
		1704	coro->prio = newprio;
		1705	}
		1706	}
		1707	OUTPUT:
		1708	RETVAL
		1709
		1710	SV *
		1711	ready (SV *self)
		1712	PROTOTYPE: $
		1713	CODE:
		1714	RETVAL = boolSV (api_ready (self));
		1715	OUTPUT:
		1716	RETVAL
		1717
		1718	int
1098	nready(...)	1719	nready (...)
1099	PROTOTYPE:	1720	PROTOTYPE:
1100	CODE:	1721	CODE:
1101	RETVAL = coro_nready;	1722	RETVAL = coro_nready;
1102	OUTPUT:	1723	OUTPUT:
1103	RETVAL	1724	RETVAL
1104		1725
		1726	# for async_pool speedup
1105	void	1727	void
1106	schedule(...)	1728	_pool_1 (SV *cb)
1107	PROTOTYPE:
1108	CODE:	1729	CODE:
1109	api_schedule ();	1730	{
		1731	struct coro *coro = SvSTATE (coro_current);
		1732	HV *hv = (HV *)SvRV (coro_current);
		1733	AV *defav = GvAV (PL_defgv);
		1734	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1735	AV *invoke_av;
		1736	int i, len;
		1737
		1738	if (!invoke)
		1739	croak ("\3terminate\2\n");
		1740
		1741	SvREFCNT_dec (coro->saved_deffh);
		1742	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1743
		1744	hv_store (hv, "desc", sizeof ("desc") - 1,
		1745	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1746
		1747	invoke_av = (AV *)SvRV (invoke);
		1748	len = av_len (invoke_av);
		1749
		1750	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1751
		1752	if (len > 0)
		1753	{
		1754	av_fill (defav, len - 1);
		1755	for (i = 0; i < len; ++i)
		1756	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1757	}
		1758
		1759	SvREFCNT_dec (invoke);
		1760	}
1110		1761
1111	void	1762	void
1112	cede(...)	1763	_pool_2 (SV *cb)
1113	PROTOTYPE:
1114	CODE:	1764	CODE:
1115	api_cede ();	1765	{
		1766	struct coro *coro = SvSTATE (coro_current);
1116		1767
		1768	sv_setsv (cb, &PL_sv_undef);
		1769
		1770	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1771	coro->saved_deffh = 0;
		1772
		1773	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1774	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1775	croak ("\3terminate\2\n");
		1776
		1777	av_clear (GvAV (PL_defgv));
		1778	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1779	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1780
		1781	coro->prio = 0;
		1782
		1783	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1784	api_trace (coro_current, 0);
		1785
		1786	av_push (av_async_pool, newSVsv (coro_current));
		1787	}
		1788
		1789
		1790	MODULE = Coro::State PACKAGE = Coro::AIO
		1791
		1792	SV *
		1793	_get_state ()
		1794	CODE:
		1795	{
		1796	struct io_state *data;
		1797
		1798	RETVAL = newSV (sizeof (struct io_state));
		1799	data = (struct io_state *)SvPVX (RETVAL);
		1800	SvCUR_set (RETVAL, sizeof (struct io_state));
		1801	SvPOK_only (RETVAL);
		1802
		1803	data->errorno = errno;
		1804	data->laststype = PL_laststype;
		1805	data->laststatval = PL_laststatval;
		1806	data->statcache = PL_statcache;
		1807	}
		1808	OUTPUT:
		1809	RETVAL
		1810
		1811	void
		1812	_set_state (char *data_)
		1813	PROTOTYPE: $
		1814	CODE:
		1815	{
		1816	struct io_state *data = (void *)data_;
		1817
		1818	errno = data->errorno;
		1819	PL_laststype = data->laststype;
		1820	PL_laststatval = data->laststatval;
		1821	PL_statcache = data->statcache;
		1822	}
		1823

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