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Comparing Coro/Coro/State.xs (file contents):
Revision 1.16 by root, Wed Jul 25 04:26:55 2001 UTC vs.
Revision 1.201 by root, Mon Oct 8 01:23:14 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
		5
1	#include "EXTERN.h"	6	#include "EXTERN.h"
2	#include "perl.h"	7	#include "perl.h"
3	#include "XSUB.h"	8	#include "XSUB.h"
4		9
5	#include "libcoro/coro.c"	10	#include "patchlevel.h"
		11
		12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
6		15
7	#ifdef HAVE_MMAP	16	#ifdef HAVE_MMAP
8	# include <unistd.h>	17	# include <unistd.h>
9	# include <sys/mman.h>	18	# include <sys/mman.h>
10	# ifndef MAP_ANON
11	# ifdef MAP_ANONYMOUS	19	# ifndef MAP_ANONYMOUS
12	# define MAP_ANON MAP_ANONYMOUS	20	# ifdef MAP_ANON
		21	# define MAP_ANONYMOUS MAP_ANON
13	# else	22	# else
14	# undef HAVE_MMAP	23	# undef HAVE_MMAP
15	# endif	24	# endif
16	# endif	25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
17	#endif	33	# endif
18
19	#define MAY_FLUSH /* increases codesize */
20
21	/* perl-related */
22	#define TRANSFER_SAVE_DEFAV 0x00000001
23	#define TRANSFER_SAVE_DEFSV 0x00000002
24	#define TRANSFER_SAVE_ERRSV 0x00000004
25	/* c-related */
26	#define TRANSFER_SAVE_CCTXT 0x00000008
27	#ifdef CORO_LAZY_STACK
28	# define TRANSFER_LAZY_STACK 0x00000010
29	#else	34	#else
30	# define TRANSFER_LAZY_STACK 0x00000000	35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
		38
		39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	|| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
		56	# ifndef PL_ppaddr
		57	# define PL_ppaddr ppaddr
31	#endif	58	# endif
		59	# ifndef call_sv
		60	# define call_sv perl_call_sv
		61	# endif
		62	# ifndef get_sv
		63	# define get_sv perl_get_sv
		64	# endif
		65	# ifndef get_cv
		66	# define get_cv perl_get_cv
		67	# endif
		68	# ifndef IS_PADGV
		69	# define IS_PADGV(v) 0
		70	# endif
		71	# ifndef IS_PADCONST
		72	# define IS_PADCONST(v) 0
		73	# endif
		74	#endif
32		75
33	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \	76	/* 5.8.7 */
34	|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)	77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
35		80
36	#define SUB_INIT "Coro::State::initialize"	81	/* 5.8.8 */
37	#define UCORO_STATE "_coro_state"	82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
38		88
39	/* The next macro should delcare a variable stacklevel that contains and approximation	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	* to the current C stack pointer. It's property is that it changes with each call	90	# undef CORO_STACKGUARD
41	* and should be unique. */	91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
		104	#define dSTACKLEVEL volatile char stacklevel
42	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
43		106
44	#define labs(l) ((l) >= 0 ? (l) : -(l))	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
45		108
46	/* this is actually not only the c stack but also c registers etc... */	109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
		123
		124	#include "CoroAPI.h"
		125
		126	#ifdef USE_ITHREADS
		127	static perl_mutex coro_mutex;
		128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		130	#else
		131	# define LOCK (void)0
		132	# define UNLOCK (void)0
		133	#endif
		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
		138	struct io_state
		139	{
		140	int errorno;
		141	I32 laststype;
		142	int laststatval;
		143	Stat_t statcache;
		144	};
		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
		147	static struct CoroAPI coroapi;
		148	static AV *main_mainstack; /* used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
		150	static HV *coro_state_stash, *coro_stash;
		151	static SV *coro_mortal; /* will be freed after next transfer */
		152
		153	static GV *irsgv; /* $/ */
		154	static GV *stdoutgv; /* *STDOUT */
		155
		156	static HV *hv_sig; /* %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
		165	static struct coro_cctx *cctx_first;
		166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		175	};
		176
		177	/* this is a structure representing a c-level coroutine */
		178	typedef struct coro_cctx {
		179	struct coro_cctx *next;
		180
		181	/* the stack */
		182	void *sptr;
		183	size_t ssize;
		184
		185	/* cpu state */
		186	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		187	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		188	JMPENV *top_env;
		189	coro_context cctx;
		190
		191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
		196
		197	enum {
		198	CF_RUNNING = 0x0001, /* coroutine is running */
		199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
47	typedef struct {	205	typedef struct {
48	int refcnt; /* pointer reference counter */	206	SV *defsv;
49	int usecnt; /* shared by how many coroutines */	207	AV *defav;
50	int gencnt; /* generation counter */	208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
51		214
52	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
53		216
54	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
55	long ssize; /* positive == mmap, otherwise malloc */
56	} coro_stack;
57
58	static coro_stack main_stack = { 1, 0, 0 };
59
60	struct coro {	218	struct coro {
61	/* the optional C context */	219	/* the c coroutine allocated to this perl coroutine, if any */
62	coro_stack *stack;	220	coro_cctx *cctx;
63	void *cursp;
64	int gencnt;
65		221
66	/* optionally saved, might be zero */	222	/* process data */
67	AV *defav;
68	SV *defsv;
69	SV *errsv;
70
71	/* saved global state not related to stacks */
72	U8 dowarn;
73
74	/* the stacks and related info (callchain etc..) */
75	PERL_SI *curstackinfo;
76	AV *curstack;
77	AV *mainstack;	223	AV *mainstack;
78	SV **stack_sp;	224	perl_slots *slot; /* basically the saved sp */
79	OP *op;
80	SV **curpad;
81	SV **stack_base;
82	SV **stack_max;
83	SV **tmps_stack;
84	I32 tmps_floor;
85	I32 tmps_ix;
86	I32 tmps_max;
87	I32 *markstack;
88	I32 *markstack_ptr;
89	I32 *markstack_max;
90	I32 *scopestack;
91	I32 scopestack_ix;
92	I32 scopestack_max;
93	ANY *savestack;
94	I32 savestack_ix;
95	I32 savestack_max;
96	OP **retstack;
97	I32 retstack_ix;
98	I32 retstack_max;
99	COP *curcop;
100	JMPENV start_env;
101	JMPENV *top_env;
102		225
103	/* data associated with this coroutine (initial args) */	226	/* data associated with this coroutine (initial args) */
104	AV *args;	227	AV *args;
		228	int refcnt;
		229	int flags; /* CF_ flags */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV *throw;
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
		243	HV *hv; /* the perl hash associated with this coro, if any */
105	};	244	};
106		245
107	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
109		248
110	static AV *main_mainstack; /* used to differentiate between $main and others */	249	/** Coro ********************************************************************/
111	static HV *coro_state_stash;
112	static SV *ucoro_state_sv;
113	static U32 ucoro_state_hash;
114	static HV *padlist_cache;
115		250
116	/* mostly copied from op.c:cv_clone2 */	251	#define PRIO_MAX 3
117	STATIC AV *	252	#define PRIO_HIGH 1
118	clone_padlist (AV *protopadlist)	253	#define PRIO_NORMAL 0
		254	#define PRIO_LOW -1
		255	#define PRIO_IDLE -3
		256	#define PRIO_MIN -4
		257
		258	/* for Coro.pm */
		259	static SV *coro_current;
		260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		261	static int coro_nready;
		262	static struct coro *coro_first;
		263
		264	/** lowlevel stuff **********************************************************/
		265
		266	static SV *
		267	coro_get_sv (const char *name, int create)
119	{	268	{
120	AV *av;	269	#if PERL_VERSION_ATLEAST (5,9,0)
121	I32 ix;	270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
122	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	271	get_sv (name, create);
123	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	272	#endif
124	SV **pname = AvARRAY (protopad_name);	273	return get_sv (name, create);
125	SV **ppad = AvARRAY (protopad);	274	}
126	I32 fname = AvFILLp (protopad_name);	275
127	I32 fpad = AvFILLp (protopad);	276	static AV *
		277	coro_get_av (const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,9,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_av (name, create);
		282	#endif
		283	return get_av (name, create);
		284	}
		285
		286	static HV *
		287	coro_get_hv (const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,9,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_hv (name, create);
		292	#endif
		293	return get_hv (name, create);
		294	}
		295
		296	static AV *
		297	coro_clone_padlist (pTHX_ CV *cv)
		298	{
		299	AV *padlist = CvPADLIST (cv);
128	AV *newpadlist, *newpad_name, *newpad;	300	AV *newpadlist, *newpad;
129	SV **npad;
130
131	newpad_name = newAV ();
132	for (ix = fname; ix >= 0; ix--)
133	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
134
135	newpad = newAV ();
136	av_fill (newpad, AvFILLp (protopad));
137	npad = AvARRAY (newpad);
138		301
139	newpadlist = newAV ();	302	newpadlist = newAV ();
140	AvREAL_off (newpadlist);	303	AvREAL_off (newpadlist);
141	av_store (newpadlist, 0, (SV *) newpad_name);	304	#if PERL_VERSION_ATLEAST (5,9,0)
		305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		306	#else
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		308	#endif
		309	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		310	--AvFILLp (padlist);
		311
		312	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
142	av_store (newpadlist, 1, (SV *) newpad);	313	av_store (newpadlist, 1, (SV *)newpad);
143		314
144	av = newAV (); /* will be @_ */	315	return newpadlist;
145	av_extend (av, 0);	316	}
146	av_store (newpad, 0, (SV *) av);
147	AvFLAGS (av) = AVf_REIFY;
148		317
149	for (ix = fpad; ix > 0; ix--)	318	static void
		319	free_padlist (pTHX_ AV *padlist)
		320	{
		321	/* may be during global destruction */
		322	if (SvREFCNT (padlist))
150	{	323	{
151	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	324	I32 i = AvFILLp (padlist);
152	if (namesv && namesv != &PL_sv_undef)	325	while (i >= 0)
153	{	326	{
154	char *name = SvPVX (namesv); /* XXX */	327	SV **svp = av_fetch (padlist, i--, FALSE);
155	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	328	if (svp)
156	{ /* lexical from outside? */
157	npad[ix] = SvREFCNT_inc (ppad[ix]);
158	}	329	{
159	else
160	{ /* our own lexical */
161	SV *sv;	330	SV *sv;
162	if (*name == '&')	331	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163	sv = SvREFCNT_inc (ppad[ix]);	332	SvREFCNT_dec (sv);
164	else if (*name == '@')	333
165	sv = (SV *) newAV ();	334	SvREFCNT_dec (*svp);
166	else if (*name == '%')
167	sv = (SV *) newHV ();
168	else
169	sv = NEWSV (0, 0);
170	if (!SvPADBUSY (sv))
171	SvPADMY_on (sv);
172	npad[ix] = sv;
173	}	335	}
174	}	336	}
175	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
176	{
177	npad[ix] = SvREFCNT_inc (ppad[ix]);
178	}
179	else
180	{
181	SV *sv = NEWSV (0, 0);
182	SvPADTMP_on (sv);
183	npad[ix] = sv;
184	}
185	}
186		337
187	#if 0 /* return -ENOTUNDERSTOOD */
188	/* Now that vars are all in place, clone nested closures. */
189
190	for (ix = fpad; ix > 0; ix--) {
191	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
192	if (namesv
193	&& namesv != &PL_sv_undef
194	&& !(SvFLAGS(namesv) & SVf_FAKE)
195	&& *SvPVX(namesv) == '&'
196	&& CvCLONE(ppad[ix]))
197	{
198	CV *kid = cv_clone((CV*)ppad[ix]);
199	SvREFCNT_dec(ppad[ix]);
200	CvCLONE_on(kid);
201	SvPADMY_on(kid);
202	npad[ix] = (SV*)kid;
203	}
204	}
205	#endif
206
207	return newpadlist;
208	}
209
210	#ifdef MAY_FLUSH
211	STATIC AV *
212	free_padlist (AV *padlist)
213	{
214	/* may be during global destruction */
215	if (SvREFCNT(padlist))
216	{
217	I32 i = AvFILLp(padlist);
218	while (i >= 0)
219	{
220	SV **svp = av_fetch(padlist, i--, FALSE);
221	SV *sv = svp ? *svp : Nullsv;
222	if (sv)
223	SvREFCNT_dec(sv);
224	}
225
226	SvREFCNT_dec((SV*)padlist);	338	SvREFCNT_dec ((SV*)padlist);
227	}	339	}
228	}	340	}
229	#endif	341
		342	static int
		343	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		344	{
		345	AV *padlist;
		346	AV *av = (AV *)mg->mg_obj;
		347
		348	/* casting is fun. */
		349	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		350	free_padlist (aTHX_ padlist);
		351
		352	SvREFCNT_dec (av);
		353
		354	return 0;
		355	}
		356
		357	#define PERL_MAGIC_coro PERL_MAGIC_ext
		358
		359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		360
		361	#define CORO_MAGIC(cv) \
		362	SvMAGIC (cv) \
		363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		364	? SvMAGIC (cv) \
		365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		366	: 0
		367
		368	static struct coro *
		369	SvSTATE_ (pTHX_ SV *coro)
		370	{
		371	HV *stash;
		372	MAGIC *mg;
		373
		374	if (SvROK (coro))
		375	coro = SvRV (coro);
		376
		377	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		378	croak ("Coro::State object required");
		379
		380	stash = SvSTASH (coro);
		381	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		382	{
		383	/* very slow, but rare, check */
		384	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		385	croak ("Coro::State object required");
		386	}
		387
		388	mg = CORO_MAGIC (coro);
		389	return (struct coro *)mg->mg_ptr;
		390	}
		391
		392	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
230		393
231	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
232	STATIC void	395	static void
233	get_padlist (CV *cv)	396	get_padlist (pTHX_ CV *cv)
234	{	397	{
235	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
236		400
237	if (he && AvFILLp ((AV *)*he) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
238	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
239	else	403	else
240	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
241	}
242
243	STATIC void
244	put_padlist (CV *cv)
245	{
246	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
247
248	if (SvTYPE (*he) != SVt_PVAV)
249	{	404	{
		405	#if CORO_PREFER_PERL_FUNCTIONS
		406	/* this is probably cleaner, but also slower? */
		407	CV *cp = Perl_cv_clone (cv);
		408	CvPADLIST (cv) = CvPADLIST (cp);
		409	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (*he);	410	SvREFCNT_dec (cp);
251	*he = (SV *)newAV ();	411	#else
		412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		413	#endif
252	}	414	}
253
254	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
255	}	415	}
256		416
257	#ifdef MAY_FLUSH	417	static void
258	STATIC void	418	put_padlist (pTHX_ CV *cv)
259	flush_padlist_cache ()
260	{	419	{
261	HV *hv = padlist_cache;	420	MAGIC *mg = CORO_MAGIC (cv);
262	padlist_cache = newHV ();	421	AV *av;
263		422
264	if (hv_iterinit (hv))	423	if (expect_false (!mg))
265	{
266	HE *he;
267	AV *padlist;
268
269	while (!!(he = hv_iternext (hv)))
270	{
271	AV *av = (AV *)HeVAL(he);
272
273	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (padlist);
276	}
277	}	424	{
		425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		427	mg->mg_virtual = &vtbl_coro;
		428	mg->mg_obj = (SV *)newAV ();
		429	}
278		430
279	SvREFCNT_dec (hv);	431	av = (AV *)mg->mg_obj;
280	}
281	#endif
282		432
283	#define SB do {	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
284	#define SE } while (0)	434	av_extend (av, AvMAX (av) + 1);
285		435
286	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
287	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	437	}
288		438
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	439	/** load & save, init *******************************************************/
290		440
291	static void	441	static void
292	load_state(pTHX_ Coro__State c)	442	load_perl (pTHX_ Coro__State c)
293	{	443	{
294	PL_dowarn = c->dowarn;	444	perl_slots *slot = c->slot;
		445	c->slot = 0;
295		446
296	PL_curstackinfo = c->curstackinfo;
297	PL_curstack = c->curstack;
298	PL_mainstack = c->mainstack;	447	PL_mainstack = c->mainstack;
299	PL_stack_sp = c->stack_sp;
300	PL_op = c->op;
301	PL_curpad = c->curpad;
302	PL_stack_base = c->stack_base;
303	PL_stack_max = c->stack_max;
304	PL_tmps_stack = c->tmps_stack;
305	PL_tmps_floor = c->tmps_floor;
306	PL_tmps_ix = c->tmps_ix;
307	PL_tmps_max = c->tmps_max;
308	PL_markstack = c->markstack;
309	PL_markstack_ptr = c->markstack_ptr;
310	PL_markstack_max = c->markstack_max;
311	PL_scopestack = c->scopestack;
312	PL_scopestack_ix = c->scopestack_ix;
313	PL_scopestack_max = c->scopestack_max;
314	PL_savestack = c->savestack;
315	PL_savestack_ix = c->savestack_ix;
316	PL_savestack_max = c->savestack_max;
317	PL_retstack = c->retstack;
318	PL_retstack_ix = c->retstack_ix;
319	PL_retstack_max = c->retstack_max;
320	PL_curcop = c->curcop;
321	PL_start_env = c->start_env;
322	PL_top_env = c->top_env;
323		448
324	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	449	GvSV (PL_defgv) = slot->defsv;
325	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	450	GvAV (PL_defgv) = slot->defav;
326	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	451	GvSV (PL_errgv) = slot->errsv;
		452	GvSV (irsgv) = slot->irsgv;
		453
		454	#define VAR(name,type) PL_ ## name = slot->name;
		455	# include "state.h"
		456	#undef VAR
327		457
328	{	458	{
329	dSP;	459	dSP;
		460
330	CV *cv;	461	CV *cv;
331		462
332	/* now do the ugly restore mess */	463	/* now do the ugly restore mess */
333	while ((cv = (CV *)POPs))	464	while (expect_true (cv = (CV *)POPs))
334	{	465	{
335	AV *padlist = (AV *)POPs;
336
337	if (padlist)
338	{
339	put_padlist (cv); /* mark this padlist as available */	466	put_padlist (aTHX_ cv); /* mark this padlist as available */
340	CvPADLIST(cv) = padlist;	467	CvDEPTH (cv) = PTR2IV (POPs);
341	#ifdef USE_THREADS	468	CvPADLIST (cv) = (AV *)POPs;
342	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343	#endif
344	}
345
346	++CvDEPTH(cv);
347	}	469	}
348		470
349	PUTBACK;	471	PUTBACK;
350	}	472	}
351	}	473	}
352		474
353	static void	475	static void
354	save_state(pTHX_ Coro__State c, int flags)	476	save_perl (pTHX_ Coro__State c)
355	{	477	{
356	{	478	{
357	dSP;	479	dSP;
358	I32 cxix = cxstack_ix;	480	I32 cxix = cxstack_ix;
359	PERL_CONTEXT *ccstk = cxstack;	481	PERL_CONTEXT *ccstk = cxstack;
…		…
362	/*	484	/*
363	* the worst thing you can imagine happens first - we have to save	485	* the worst thing you can imagine happens first - we have to save
364	* (and reinitialize) all cv's in the whole callchain :(	486	* (and reinitialize) all cv's in the whole callchain :(
365	*/	487	*/
366		488
367	PUSHs (Nullsv);	489	XPUSHs (Nullsv);
368	/* this loop was inspired by pp_caller */	490	/* this loop was inspired by pp_caller */
369	for (;;)	491	for (;;)
370	{	492	{
371	do	493	while (expect_true (cxix >= 0))
372	{	494	{
373	PERL_CONTEXT *cx = &ccstk[cxix--];	495	PERL_CONTEXT *cx = &ccstk[cxix--];
374		496
375	if (CxTYPE(cx) == CXt_SUB)	497	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
376	{	498	{
377	CV *cv = cx->blk_sub.cv;	499	CV *cv = cx->blk_sub.cv;
		500
378	if (CvDEPTH(cv))	501	if (expect_true (CvDEPTH (cv)))
379	{	502	{
380	#ifdef USE_THREADS
381	/*XPUSHs ((SV *)CvOWNER(cv));*/
382	/*CvOWNER(cv) = 0;*/
383	/*error must unlock this cv etc.. etc...*/
384	#endif
385	EXTEND (SP, CvDEPTH(cv)*2);	503	EXTEND (SP, 3);
386
387	while (--CvDEPTH(cv))
388	{
389	/* this tells the restore code to increment CvDEPTH */
390	PUSHs (Nullsv);
391	PUSHs ((SV *)cv);
392	}
393
394	PUSHs ((SV *)CvPADLIST(cv));	504	PUSHs ((SV *)CvPADLIST (cv));
		505	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395	PUSHs ((SV *)cv);	506	PUSHs ((SV *)cv);
396		507
397	get_padlist (cv); /* this is a monster */	508	CvDEPTH (cv) = 0;
		509	get_padlist (aTHX_ cv);
398	}	510	}
399	}	511	}
400	else if (CxTYPE(cx) == CXt_FORMAT)
401	{
402	/* I never used formats, so how should I know how these are implemented? */
403	/* my bold guess is as a simple, plain sub... */
404	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405	}
406	}	512	}
407	while (cxix >= 0);
408		513
409	if (top_si->si_type == PERLSI_MAIN)	514	if (expect_true (top_si->si_type == PERLSI_MAIN))
410	break;	515	break;
411		516
412	top_si = top_si->si_prev;	517	top_si = top_si->si_prev;
413	ccstk = top_si->si_cxstack;	518	ccstk = top_si->si_cxstack;
414	cxix = top_si->si_cxix;	519	cxix = top_si->si_cxix;
415	}	520	}
416		521
417	PUTBACK;	522	PUTBACK;
418	}	523	}
419		524
420	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	525	/* allocate some space on the context stack for our purposes */
421	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	526	{
422	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	527	/* we manually unroll here, as usually 2 slots is enough */
		528	int i;
		529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	for (i = 3; i < SLOT_COUNT; ++i)
		533	CXINC;
423		534
424	/* I have not the slightest idea of why av_reify is necessary */	535	cxstack_ix -= SLOT_COUNT; /* undo allocation */
425	/* but if it's missing the defav contents magically get replaced sometimes */	536	}
426	if (c->defav)
427	av_reify (c->defav);
428		537
429	c->dowarn = PL_dowarn;
430
431	c->curstackinfo = PL_curstackinfo;
432	c->curstack = PL_curstack;
433	c->mainstack = PL_mainstack;	538	c->mainstack = PL_mainstack;
434	c->stack_sp = PL_stack_sp;	539
435	c->op = PL_op;	540	{
436	c->curpad = PL_curpad;	541	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
437	c->stack_base = PL_stack_base;	542
438	c->stack_max = PL_stack_max;	543	slot->defav = GvAV (PL_defgv);
439	c->tmps_stack = PL_tmps_stack;	544	slot->defsv = DEFSV;
440	c->tmps_floor = PL_tmps_floor;	545	slot->errsv = ERRSV;
441	c->tmps_ix = PL_tmps_ix;	546	slot->irsgv = GvSV (irsgv);
442	c->tmps_max = PL_tmps_max;	547
443	c->markstack = PL_markstack;	548	#define VAR(name,type) slot->name = PL_ ## name;
444	c->markstack_ptr = PL_markstack_ptr;	549	# include "state.h"
445	c->markstack_max = PL_markstack_max;	550	#undef VAR
446	c->scopestack = PL_scopestack;	551	}
447	c->scopestack_ix = PL_scopestack_ix;
448	c->scopestack_max = PL_scopestack_max;
449	c->savestack = PL_savestack;
450	c->savestack_ix = PL_savestack_ix;
451	c->savestack_max = PL_savestack_max;
452	c->retstack = PL_retstack;
453	c->retstack_ix = PL_retstack_ix;
454	c->retstack_max = PL_retstack_max;
455	c->curcop = PL_curcop;
456	c->start_env = PL_start_env;
457	c->top_env = PL_top_env;
458	}	552	}
459		553
460	/*	554	/*
461	* allocate various perl stacks. This is an exact copy	555	* allocate various perl stacks. This is an exact copy
462	* of perl.c:init_stacks, except that it uses less memory	556	* of perl.c:init_stacks, except that it uses less memory
463	* on the assumption that coroutines do not usually need	557	* on the (sometimes correct) assumption that coroutines do
464	* a lot of stackspace.	558	* not usually need a lot of stackspace.
465	*/	559	*/
466	STATIC void	560	#if CORO_PREFER_PERL_FUNCTIONS
		561	# define coro_init_stacks init_stacks
		562	#else
		563	static void
467	coro_init_stacks (pTHX)	564	coro_init_stacks (pTHX)
468	{	565	{
469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	566	PL_curstackinfo = new_stackinfo(32, 8);
470	PL_curstackinfo->si_type = PERLSI_MAIN;	567	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	568	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	569	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473		570
474	PL_stack_base = AvARRAY(PL_curstack);	571	PL_stack_base = AvARRAY(PL_curstack);
475	PL_stack_sp = PL_stack_base;	572	PL_stack_sp = PL_stack_base;
476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	573	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477		574
478	New(50,PL_tmps_stack,96,SV*);	575	New(50,PL_tmps_stack,32,SV*);
479	PL_tmps_floor = -1;	576	PL_tmps_floor = -1;
480	PL_tmps_ix = -1;	577	PL_tmps_ix = -1;
481	PL_tmps_max = 96;	578	PL_tmps_max = 32;
482		579
483	New(54,PL_markstack,16,I32);	580	New(54,PL_markstack,16,I32);
484	PL_markstack_ptr = PL_markstack;	581	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	582	PL_markstack_max = PL_markstack + 16;
486		583
		584	#ifdef SET_MARK_OFFSET
487	SET_MARK_OFFSET;	585	SET_MARK_OFFSET;
		586	#endif
488		587
489	New(54,PL_scopestack,16,I32);	588	New(54,PL_scopestack,8,I32);
490	PL_scopestack_ix = 0;	589	PL_scopestack_ix = 0;
491	PL_scopestack_max = 16;	590	PL_scopestack_max = 8;
492		591
493	New(54,PL_savestack,96,ANY);	592	New(54,PL_savestack,24,ANY);
494	PL_savestack_ix = 0;	593	PL_savestack_ix = 0;
495	PL_savestack_max = 96;	594	PL_savestack_max = 24;
496		595
		596	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	597	New(54,PL_retstack,4,OP*);
498	PL_retstack_ix = 0;	598	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	599	PL_retstack_max = 4;
		600	#endif
500	}	601	}
		602	#endif
501		603
502	/*	604	/*
503	* destroy the stacks, the callchain etc...	605	* destroy the stacks, the callchain etc...
504	* still there is a memleak of 128 bytes...
505	*/	606	*/
506	STATIC void	607	static void
507	destroy_stacks(pTHX)	608	coro_destroy_stacks (pTHX)
508	{	609	{
509	/* is this ugly, I ask? */
510	while (PL_scopestack_ix)
511	LEAVE;
512
513	/* sure it is, but more important: is it correct?? :/ */
514	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515	FREETMPS;
516
517	while (PL_curstackinfo->si_next)	610	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	611	PL_curstackinfo = PL_curstackinfo->si_next;
519		612
520	while (PL_curstackinfo)	613	while (PL_curstackinfo)
521	{	614	{
522	PERL_SI *p = PL_curstackinfo->si_prev;	615	PERL_SI *p = PL_curstackinfo->si_prev;
523		616
524	{	617	if (!IN_DESTRUCT)
525	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */
528	}
529
530	dounwind(-1);
531
532	SvREFCNT_dec(PL_curstackinfo->si_stack);	618	SvREFCNT_dec (PL_curstackinfo->si_stack);
		619
533	Safefree(PL_curstackinfo->si_cxstack);	620	Safefree (PL_curstackinfo->si_cxstack);
534	Safefree(PL_curstackinfo);	621	Safefree (PL_curstackinfo);
535	PL_curstackinfo = p;	622	PL_curstackinfo = p;
536	}	623	}
537		624
538	Safefree(PL_tmps_stack);	625	Safefree (PL_tmps_stack);
539	Safefree(PL_markstack);	626	Safefree (PL_markstack);
540	Safefree(PL_scopestack);	627	Safefree (PL_scopestack);
541	Safefree(PL_savestack);	628	Safefree (PL_savestack);
		629	#if !PERL_VERSION_ATLEAST (5,9,0)
542	Safefree(PL_retstack);	630	Safefree (PL_retstack);
543	}
544
545	static void
546	allocate_stack (Coro__State ctx, int alloc)
547	{
548	coro_stack *stack;
549
550	New (0, stack, 1, coro_stack);
551
552	stack->refcnt = 1;
553	stack->usecnt = 1;
554	stack->gencnt = ctx->gencnt = 0;
555	if (alloc)
556	{
557	#ifdef HAVE_MMAP
558	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write */
559	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
560	if (stack->sptr == (void *)-1)
561	#endif	631	#endif
		632	}
		633
		634	static size_t
		635	coro_rss (pTHX_ struct coro *coro)
		636	{
		637	size_t rss = sizeof (*coro);
		638
		639	if (coro->mainstack)
		640	{
		641	perl_slots tmp_slot;
		642	perl_slots *slot;
		643
		644	if (coro->flags & CF_RUNNING)
562	{	645	{
563	/*FIXME*//*D*//* reasonable stack size! */	646	slot = &tmp_slot;
564	stack->ssize = -4096 * sizeof (long);	647
565	New (0, stack->sptr, 4096, long);	648	#define VAR(name,type) slot->name = PL_ ## name;
		649	# include "state.h"
		650	#undef VAR
566	}	651	}
567	}
568	else
569	stack->sptr = 0;
570
571	ctx->stack = stack;
572	}
573
574	static void
575	deallocate_stack (Coro__State ctx)
576	{
577	coro_stack *stack = ctx->stack;
578
579	ctx->stack = 0;
580
581	if (stack)
582	{
583	if (!--stack->refcnt)
584	{
585	#ifdef HAVE_MMAP
586	if (stack->ssize > 0 && stack->sptr)
587	munmap (stack->sptr, stack->ssize);
588	else	652	else
589	#else	653	slot = coro->slot;
590	Safefree (stack->sptr);
591	#endif
592	Safefree (stack);
593	}
594	else if (ctx->gencnt == stack->gencnt)
595	--stack->usecnt;
596	}
597	}
598		654
		655	rss += sizeof (slot->curstackinfo);
		656	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		657	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		658	rss += slot->tmps_max * sizeof (SV *);
		659	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		660	rss += slot->scopestack_max * sizeof (I32);
		661	rss += slot->savestack_max * sizeof (ANY);
		662
		663	#if !PERL_VERSION_ATLEAST (5,9,0)
		664	rss += slot->retstack_max * sizeof (OP *);
		665	#endif
		666	}
		667
		668	return rss;
		669	}
		670
		671	/** coroutine stack handling ************************************************/
		672
599	static void	673	static void
600	setup_coro (void *arg)	674	coro_setup (pTHX_ struct coro *coro)
601	{	675	{
602	/*	676	/*
603	* emulate part of the perl startup here.	677	* emulate part of the perl startup here.
604	*/	678	*/
		679	coro_init_stacks (aTHX);
		680
		681	PL_runops = RUNOPS_DEFAULT;
		682	PL_curcop = &PL_compiling;
		683	PL_in_eval = EVAL_NULL;
		684	PL_comppad = 0;
		685	PL_curpm = 0;
		686	PL_curpad = 0;
		687	PL_localizing = 0;
		688	PL_dirty = 0;
		689	PL_restartop = 0;
		690	SvREFCNT_inc (PL_diehook ); hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		691	SvREFCNT_inc (PL_warnhook); hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		692
		693	GvSV (PL_defgv) = newSV (0);
		694	GvAV (PL_defgv) = coro->args; coro->args = 0;
		695	GvSV (PL_errgv) = newSV (0);
		696	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		697	PL_rs = newSVsv (GvSV (irsgv));
		698	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		699
		700	{
		701	dSP;
		702	LOGOP myop;
		703
		704	Zero (&myop, 1, LOGOP);
		705	myop.op_next = Nullop;
		706	myop.op_flags = OPf_WANT_VOID;
		707
		708	PUSHMARK (SP);
		709	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		710	PUTBACK;
		711	PL_op = (OP *)&myop;
		712	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		713	SPAGAIN;
		714	}
		715
		716	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		717	}
		718
		719	static void
		720	coro_destroy (pTHX_ struct coro *coro)
		721	{
		722	if (!IN_DESTRUCT)
		723	{
		724	/* restore all saved variables and stuff */
		725	LEAVE_SCOPE (0);
		726	assert (PL_tmps_floor == -1);
		727
		728	/* free all temporaries */
		729	FREETMPS;
		730	assert (PL_tmps_ix == -1);
		731
		732	/* unwind all extra stacks */
		733	POPSTACK_TO (PL_mainstack);
		734
		735	/* unwind main stack */
		736	dounwind (-1);
		737	}
		738
		739	SvREFCNT_dec (GvSV (PL_defgv));
		740	SvREFCNT_dec (GvAV (PL_defgv));
		741	SvREFCNT_dec (GvSV (PL_errgv));
		742	SvREFCNT_dec (PL_defoutgv);
		743	SvREFCNT_dec (PL_rs);
		744	SvREFCNT_dec (GvSV (irsgv));
		745
		746	SvREFCNT_dec (PL_diehook);
		747	SvREFCNT_dec (PL_warnhook);
		748
		749	SvREFCNT_dec (coro->saved_deffh);
		750	SvREFCNT_dec (coro->throw);
		751
		752	coro_destroy_stacks (aTHX);
		753	}
		754
		755	static void
		756	free_coro_mortal (pTHX)
		757	{
		758	if (expect_true (coro_mortal))
		759	{
		760	SvREFCNT_dec (coro_mortal);
		761	coro_mortal = 0;
		762	}
		763	}
		764
		765	static int
		766	runops_trace (pTHX)
		767	{
		768	COP *oldcop = 0;
		769	int oldcxix = -2;
		770	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		771	coro_cctx *cctx = coro->cctx;
		772
		773	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		774	{
		775	PERL_ASYNC_CHECK ();
		776
		777	if (cctx->flags & CC_TRACE_ALL)
		778	{
		779	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		780	{
		781	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		782	SV **bot, **top;
		783	AV *av = newAV (); /* return values */
		784	SV **cb;
		785	dSP;
		786
		787	GV *gv = CvGV (cx->blk_sub.cv);
		788	SV *fullname = sv_2mortal (newSV (0));
		789	if (isGV (gv))
		790	gv_efullname3 (fullname, gv, 0);
		791
		792	bot = PL_stack_base + cx->blk_oldsp + 1;
		793	top = cx->blk_gimme == G_ARRAY ? SP + 1
		794	: cx->blk_gimme == G_SCALAR ? bot + 1
		795	: bot;
		796
		797	av_extend (av, top - bot);
		798	while (bot < top)
		799	av_push (av, SvREFCNT_inc (*bot++));
		800
		801	PL_runops = RUNOPS_DEFAULT;
		802	ENTER;
		803	SAVETMPS;
		804	EXTEND (SP, 3);
		805	PUSHMARK (SP);
		806	PUSHs (&PL_sv_no);
		807	PUSHs (fullname);
		808	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		809	PUTBACK;
		810	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		811	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		812	SPAGAIN;
		813	FREETMPS;
		814	LEAVE;
		815	PL_runops = runops_trace;
		816	}
		817
		818	if (oldcop != PL_curcop)
		819	{
		820	oldcop = PL_curcop;
		821
		822	if (PL_curcop != &PL_compiling)
		823	{
		824	SV **cb;
		825
		826	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		827	{
		828	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		829
		830	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		831	{
		832	runops_proc_t old_runops = PL_runops;
		833	dSP;
		834	GV *gv = CvGV (cx->blk_sub.cv);
		835	SV *fullname = sv_2mortal (newSV (0));
		836
		837	if (isGV (gv))
		838	gv_efullname3 (fullname, gv, 0);
		839
		840	PL_runops = RUNOPS_DEFAULT;
		841	ENTER;
		842	SAVETMPS;
		843	EXTEND (SP, 3);
		844	PUSHMARK (SP);
		845	PUSHs (&PL_sv_yes);
		846	PUSHs (fullname);
		847	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		848	PUTBACK;
		849	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		850	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		851	SPAGAIN;
		852	FREETMPS;
		853	LEAVE;
		854	PL_runops = runops_trace;
		855	}
		856
		857	oldcxix = cxstack_ix;
		858	}
		859
		860	if (cctx->flags & CC_TRACE_LINE)
		861	{
		862	dSP;
		863
		864	PL_runops = RUNOPS_DEFAULT;
		865	ENTER;
		866	SAVETMPS;
		867	EXTEND (SP, 3);
		868	PL_runops = RUNOPS_DEFAULT;
		869	PUSHMARK (SP);
		870	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		871	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		872	PUTBACK;
		873	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		874	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		875	SPAGAIN;
		876	FREETMPS;
		877	LEAVE;
		878	PL_runops = runops_trace;
		879	}
		880	}
		881	}
		882	}
		883	}
		884
		885	TAINT_NOT;
		886	return 0;
		887	}
		888
		889	/* inject a fake call to Coro::State::_cctx_init into the execution */
		890	/* _cctx_init should be careful, as it could be called at almost any time */
		891	/* during execution of a perl program */
		892	static void NOINLINE
		893	cctx_prepare (pTHX_ coro_cctx *cctx)
		894	{
605	dSP;	895	dSP;
606	Coro__State ctx = (Coro__State)arg;	896	LOGOP myop;
607	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
608		897
609	coro_init_stacks (aTHX);	898	PL_top_env = &PL_start_env;
610	JMPENV_BOOTSTRAP;	899
		900	if (cctx->flags & CC_TRACE)
		901	PL_runops = runops_trace;
		902
		903	Zero (&myop, 1, LOGOP);
		904	myop.op_next = PL_op;
		905	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		906
		907	PUSHMARK (SP);
		908	EXTEND (SP, 2);
		909	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		910	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		911	PUTBACK;
		912	PL_op = (OP *)&myop;
		913	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
611	SPAGAIN;	914	SPAGAIN;
		915	}
612		916
613	/*PL_curcop = 0;*/	917	/*
614	SvREFCNT_dec (GvAV (PL_defgv));	918	* this is a _very_ stripped down perl interpreter ;)
615	GvAV (PL_defgv) = ctx->args;	919	*/
		920	static void
		921	cctx_run (void *arg)
		922	{
		923	dTHX;
616		924
617	if (ctx->stack)	925	/* cctx_run is the alternative tail of transfer(), so unlock here. */
618	{	926	UNLOCK;
619	ctx->cursp = 0;
620		927
621	PUSHMARK(SP);	928	/* we now skip the entersub that lead to transfer() */
622	PUTBACK;	929	PL_op = PL_op->op_next;
623	(void) call_sv (sub_init, G_VOID|G_NOARGS);	930
624	croak ("FATAL: CCTXT coroutine returned!");	931	/* inject a fake subroutine call to cctx_init */
		932	cctx_prepare (aTHX_ (coro_cctx *)arg);
		933
		934	/* somebody or something will hit me for both perl_run and PL_restartop */
		935	PL_restartop = PL_op;
		936	perl_run (PL_curinterp);
		937
		938	/*
		939	* If perl-run returns we assume exit() was being called or the coro
		940	* fell off the end, which seems to be the only valid (non-bug)
		941	* reason for perl_run to return. We try to exit by jumping to the
		942	* bootstrap-time "top" top_env, as we cannot restore the "main"
		943	* coroutine as Coro has no such concept
		944	*/
		945	PL_top_env = main_top_env;
		946	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		947	}
		948
		949	static coro_cctx *
		950	cctx_new ()
		951	{
		952	coro_cctx *cctx;
		953	void *stack_start;
		954	size_t stack_size;
		955
		956	++cctx_count;
		957
		958	Newz (0, cctx, 1, coro_cctx);
		959
		960	#if HAVE_MMAP
		961	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		962	/* mmap supposedly does allocate-on-write for us */
		963	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		964
		965	if (cctx->sptr != (void *)-1)
		966	{
		967	# if CORO_STACKGUARD
		968	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		969	# endif
		970	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		971	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		972	cctx->flags |= CC_MAPPED;
625	}	973	}
626	else	974	else
627	{	975	#endif
628	UNOP myop;
629
630	PL_op = (OP *)&myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PUSHMARK(SP);
637	XPUSHs (sub_init);
638	/*
639	* the next line is slightly wrong, as PL_op->op_next
640	* is actually being executed so we skip the first op.
641	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)
644	*/
645	PUTBACK;
646	PL_op = pp_entersub();
647	SPAGAIN;
648
649	ENTER; /* necessary e.g. for dounwind */
650	}	976	{
651	}	977	cctx->ssize = coro_stacksize * (long)sizeof (long);
		978	New (0, cctx->sptr, coro_stacksize, long);
652		979
653	static void	980	if (!cctx->sptr)
654	continue_coro (void *arg)	981	{
655	{	982	perror ("FATAL: unable to allocate stack for coroutine");
656	/*	983	_exit (EXIT_FAILURE);
657	* this is a _very_ stripped down perl interpreter ;)	984	}
658	*/
659	Coro__State ctx = (Coro__State)arg;
660		985
661	ctx->cursp = 0;	986	stack_start = cctx->sptr;
662	PL_op = PL_op->op_next;	987	stack_size = cctx->ssize;
663	CALLRUNOPS(aTHX);	988	}
664	/*NORETURN*/
665	abort ();
666	}
667		989
668	STATIC void	990	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		991	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		992
		993	return cctx;
		994	}
		995
		996	static void
		997	cctx_destroy (coro_cctx *cctx)
		998	{
		999	if (!cctx)
		1000	return;
		1001
		1002	--cctx_count;
		1003
		1004	#if CORO_USE_VALGRIND
		1005	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1006	#endif
		1007
		1008	#if HAVE_MMAP
		1009	if (cctx->flags & CC_MAPPED)
		1010	munmap (cctx->sptr, cctx->ssize);
		1011	else
		1012	#endif
		1013	Safefree (cctx->sptr);
		1014
		1015	Safefree (cctx);
		1016	}
		1017
		1018	/* wether this cctx should be destructed */
		1019	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1020
		1021	static coro_cctx *
		1022	cctx_get (pTHX)
		1023	{
		1024	while (expect_true (cctx_first))
		1025	{
		1026	coro_cctx *cctx = cctx_first;
		1027	cctx_first = cctx->next;
		1028	--cctx_idle;
		1029
		1030	if (expect_true (!CCTX_EXPIRED (cctx)))
		1031	return cctx;
		1032
		1033	cctx_destroy (cctx);
		1034	}
		1035
		1036	return cctx_new ();
		1037	}
		1038
		1039	static void
		1040	cctx_put (coro_cctx *cctx)
		1041	{
		1042	/* free another cctx if overlimit */
		1043	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1044	{
		1045	coro_cctx *first = cctx_first;
		1046	cctx_first = first->next;
		1047	--cctx_idle;
		1048
		1049	cctx_destroy (first);
		1050	}
		1051
		1052	++cctx_idle;
		1053	cctx->next = cctx_first;
		1054	cctx_first = cctx;
		1055	}
		1056
		1057	/** coroutine switching *****************************************************/
		1058
		1059	static void
		1060	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1061	{
		1062	if (expect_true (prev != next))
		1063	{
		1064	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1065	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1066
		1067	if (expect_false (next->flags & CF_RUNNING))
		1068	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1069
		1070	if (expect_false (next->flags & CF_DESTROYED))
		1071	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1072
		1073	if (
		1074	#if PERL_VERSION_ATLEAST (5,9,0)
		1075	expect_false (PL_parser)
		1076	#else
		1077	expect_false (PL_lex_state != LEX_NOTPARSING)
		1078	#endif
		1079	)
		1080	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1081	}
		1082	}
		1083
		1084	/* always use the TRANSFER macro */
		1085	static void NOINLINE
669	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	1086	transfer (pTHX_ struct coro *prev, struct coro *next)
670	{	1087	{
671	dSP;
672	dSTACKLEVEL;	1088	dSTACKLEVEL;
673		1089
674	if (prev != next)	1090	/* sometimes transfer is only called to set idle_sp */
		1091	if (expect_false (!next))
		1092	{
		1093	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1094	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
675	{	1095	}
676	if (next->mainstack)	1096	else if (expect_true (prev != next))
		1097	{
		1098	coro_cctx *prev__cctx;
		1099
		1100	if (expect_false (prev->flags & CF_NEW))
677	{	1101	{
678	SAVE (prev, flags);	1102	/* create a new empty context */
679	LOAD (next);	1103	Newz (0, prev->cctx, 1, coro_cctx);
680		1104	prev->flags &= ~CF_NEW;
681	/* mark this state as in-use */	1105	prev->flags |= CF_RUNNING;
682	next->mainstack = 0;
683	next->tmps_ix = -2;
684
685	/* stacklevel changed? if yes, grab the stack for us! */
686	if (flags & TRANSFER_SAVE_CCTXT)
687	{
688	if (!prev->stack)
689	allocate_stack (prev, 0);
690	else if (prev->cursp != stacklevel
691	&& prev->stack->usecnt > 1)
692	{
693	prev->gencnt = ++prev->stack->gencnt;
694	prev->stack->usecnt = 1;
695	}
696
697	/* has our stack been invalidated? */
698	if (next->stack && next->stack->gencnt != next->gencnt)
699	{
700	deallocate_stack (next);
701	allocate_stack (next, 1);
702	coro_create (&(next->stack->cctx),
703	continue_coro, (void *)next,
704	next->stack->sptr, labs (next->stack->ssize));
705	}
706
707	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
708	}
709
710	}	1106	}
711	else if (next->tmps_ix == -2)	1107
712	croak ("tried to transfer to running coroutine");	1108	prev->flags &= ~CF_RUNNING;
		1109	next->flags |= CF_RUNNING;
		1110
		1111	LOCK;
		1112
		1113	if (expect_false (next->flags & CF_NEW))
		1114	{
		1115	/* need to start coroutine */
		1116	next->flags &= ~CF_NEW;
		1117	/* first get rid of the old state */
		1118	save_perl (aTHX_ prev);
		1119	/* setup coroutine call */
		1120	coro_setup (aTHX_ next);
		1121	}
713	else	1122	else
714	{	1123	{
715	SAVE (prev, -1); /* first get rid of the old state */	1124	/* coroutine already started */
		1125	save_perl (aTHX_ prev);
		1126	load_perl (aTHX_ next);
		1127	}
716		1128
717	if (flags & TRANSFER_SAVE_CCTXT)	1129	prev__cctx = prev->cctx;
		1130
		1131	/* possibly "free" the cctx */
		1132	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1133	{
		1134	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1135	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1136
		1137	prev->cctx = 0;
		1138
		1139	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1140	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1141	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1142	if (!next->cctx)
		1143	next->cctx = cctx_get (aTHX);
		1144
		1145	cctx_put (prev__cctx);
		1146	}
		1147
		1148	++next->usecount;
		1149
		1150	if (expect_true (!next->cctx))
		1151	next->cctx = cctx_get (aTHX);
		1152
		1153	if (expect_false (prev__cctx != next->cctx))
		1154	{
		1155	prev__cctx->top_env = PL_top_env;
		1156	PL_top_env = next->cctx->top_env;
		1157	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1158	}
		1159
		1160	free_coro_mortal (aTHX);
		1161	UNLOCK;
		1162
		1163	if (expect_false (prev->throw || next->throw))
		1164	{
		1165	struct coro *coro = SvSTATE (coro_current);
		1166
		1167	if (coro->throw)
718	{	1168	{
719	if (!prev->stack)	1169	SV *exception = coro->throw;
720	allocate_stack (prev, 0);	1170	coro->throw = 0;
721		1171	sv_setsv (ERRSV, exception);
722	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)	1172	croak (0);
723	{
724	setup_coro (next);
725
726	prev->stack->refcnt++;
727	prev->stack->usecnt++;
728	next->stack = prev->stack;
729	next->gencnt = prev->gencnt;
730	}
731	else
732	{
733	allocate_stack (next, 1);
734	coro_create (&(next->stack->cctx),
735	setup_coro, (void *)next,
736	next->stack->sptr, labs (next->stack->ssize));
737	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
738	}
739	}	1173	}
740	else
741	setup_coro (next);
742	}	1174	}
743	}	1175	}
744
745	next->cursp = stacklevel;
746	}	1176	}
747		1177
		1178	struct transfer_args
		1179	{
		1180	struct coro *prev, *next;
		1181	};
		1182
		1183	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1184	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1185
		1186	/** high level stuff ********************************************************/
		1187
		1188	static int
		1189	coro_state_destroy (pTHX_ struct coro *coro)
		1190	{
		1191	if (coro->flags & CF_DESTROYED)
		1192	return 0;
		1193
		1194	coro->flags |= CF_DESTROYED;
		1195
		1196	if (coro->flags & CF_READY)
		1197	{
		1198	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1199	/* alternative: look through all ready queues and remove the coro */
		1200	LOCK;
		1201	--coro_nready;
		1202	UNLOCK;
		1203	}
		1204	else
		1205	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1206
		1207	if (coro->mainstack && coro->mainstack != main_mainstack)
		1208	{
		1209	struct coro temp;
		1210
		1211	if (coro->flags & CF_RUNNING)
		1212	croak ("FATAL: tried to destroy currently running coroutine");
		1213
		1214	save_perl (aTHX_ &temp);
		1215	load_perl (aTHX_ coro);
		1216
		1217	coro_destroy (aTHX_ coro);
		1218
		1219	load_perl (aTHX_ &temp);
		1220
		1221	coro->slot = 0;
		1222	}
		1223
		1224	cctx_destroy (coro->cctx);
		1225	SvREFCNT_dec (coro->args);
		1226
		1227	if (coro->next) coro->next->prev = coro->prev;
		1228	if (coro->prev) coro->prev->next = coro->next;
		1229	if (coro == coro_first) coro_first = coro->next;
		1230
		1231	return 1;
		1232	}
		1233
		1234	static int
		1235	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1236	{
		1237	struct coro *coro = (struct coro *)mg->mg_ptr;
		1238	mg->mg_ptr = 0;
		1239
		1240	coro->hv = 0;
		1241
		1242	if (--coro->refcnt < 0)
		1243	{
		1244	coro_state_destroy (aTHX_ coro);
		1245	Safefree (coro);
		1246	}
		1247
		1248	return 0;
		1249	}
		1250
		1251	static int
		1252	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1253	{
		1254	struct coro *coro = (struct coro *)mg->mg_ptr;
		1255
		1256	++coro->refcnt;
		1257
		1258	return 0;
		1259	}
		1260
		1261	static MGVTBL coro_state_vtbl = {
		1262	0, 0, 0, 0,
		1263	coro_state_free,
		1264	0,
		1265	#ifdef MGf_DUP
		1266	coro_state_dup,
		1267	#else
		1268	# define MGf_DUP 0
		1269	#endif
		1270	};
		1271
		1272	static void
		1273	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1274	{
		1275	ta->prev = SvSTATE (prev_sv);
		1276	ta->next = SvSTATE (next_sv);
		1277	TRANSFER_CHECK (*ta);
		1278	}
		1279
		1280	static void
		1281	api_transfer (SV *prev_sv, SV *next_sv)
		1282	{
		1283	dTHX;
		1284	struct transfer_args ta;
		1285
		1286	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1287	TRANSFER (ta);
		1288	}
		1289
		1290	/** Coro ********************************************************************/
		1291
		1292	static void
		1293	coro_enq (pTHX_ SV *coro_sv)
		1294	{
		1295	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1296	}
		1297
		1298	static SV *
		1299	coro_deq (pTHX_ int min_prio)
		1300	{
		1301	int prio = PRIO_MAX - PRIO_MIN;
		1302
		1303	min_prio -= PRIO_MIN;
		1304	if (min_prio < 0)
		1305	min_prio = 0;
		1306
		1307	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1308	if (AvFILLp (coro_ready [prio]) >= 0)
		1309	return av_shift (coro_ready [prio]);
		1310
		1311	return 0;
		1312	}
		1313
		1314	static int
		1315	api_ready (SV *coro_sv)
		1316	{
		1317	dTHX;
		1318	struct coro *coro;
		1319
		1320	if (SvROK (coro_sv))
		1321	coro_sv = SvRV (coro_sv);
		1322
		1323	coro = SvSTATE (coro_sv);
		1324
		1325	if (coro->flags & CF_READY)
		1326	return 0;
		1327
		1328	coro->flags |= CF_READY;
		1329
		1330	LOCK;
		1331	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1332	++coro_nready;
		1333	UNLOCK;
		1334
		1335	return 1;
		1336	}
		1337
		1338	static int
		1339	api_is_ready (SV *coro_sv)
		1340	{
		1341	dTHX;
		1342	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1343	}
		1344
		1345	static void
		1346	prepare_schedule (pTHX_ struct transfer_args *ta)
		1347	{
		1348	SV *prev_sv, *next_sv;
		1349
		1350	for (;;)
		1351	{
		1352	LOCK;
		1353	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1354
		1355	/* nothing to schedule: call the idle handler */
		1356	if (expect_false (!next_sv))
		1357	{
		1358	dSP;
		1359	UNLOCK;
		1360
		1361	ENTER;
		1362	SAVETMPS;
		1363
		1364	PUSHMARK (SP);
		1365	PUTBACK;
		1366	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1367
		1368	FREETMPS;
		1369	LEAVE;
		1370	continue;
		1371	}
		1372
		1373	ta->next = SvSTATE (next_sv);
		1374
		1375	/* cannot transfer to destroyed coros, skip and look for next */
		1376	if (expect_false (ta->next->flags & CF_DESTROYED))
		1377	{
		1378	UNLOCK;
		1379	SvREFCNT_dec (next_sv);
		1380	/* coro_nready is already taken care of by destroy */
		1381	continue;
		1382	}
		1383
		1384	--coro_nready;
		1385	UNLOCK;
		1386	break;
		1387	}
		1388
		1389	/* free this only after the transfer */
		1390	prev_sv = SvRV (coro_current);
		1391	ta->prev = SvSTATE (prev_sv);
		1392	TRANSFER_CHECK (*ta);
		1393	assert (ta->next->flags & CF_READY);
		1394	ta->next->flags &= ~CF_READY;
		1395	SvRV_set (coro_current, next_sv);
		1396
		1397	LOCK;
		1398	free_coro_mortal (aTHX);
		1399	coro_mortal = prev_sv;
		1400	UNLOCK;
		1401	}
		1402
		1403	static void
		1404	prepare_cede (pTHX_ struct transfer_args *ta)
		1405	{
		1406	api_ready (coro_current);
		1407	prepare_schedule (aTHX_ ta);
		1408	}
		1409
		1410	static int
		1411	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1412	{
		1413	if (coro_nready)
		1414	{
		1415	SV *prev = SvRV (coro_current);
		1416	prepare_schedule (aTHX_ ta);
		1417	api_ready (prev);
		1418	return 1;
		1419	}
		1420	else
		1421	return 0;
		1422	}
		1423
		1424	static void
		1425	api_schedule (void)
		1426	{
		1427	dTHX;
		1428	struct transfer_args ta;
		1429
		1430	prepare_schedule (aTHX_ &ta);
		1431	TRANSFER (ta);
		1432	}
		1433
		1434	static int
		1435	api_cede (void)
		1436	{
		1437	dTHX;
		1438	struct transfer_args ta;
		1439
		1440	prepare_cede (aTHX_ &ta);
		1441
		1442	if (expect_true (ta.prev != ta.next))
		1443	{
		1444	TRANSFER (ta);
		1445	return 1;
		1446	}
		1447	else
		1448	return 0;
		1449	}
		1450
		1451	static int
		1452	api_cede_notself (void)
		1453	{
		1454	dTHX;
		1455	struct transfer_args ta;
		1456
		1457	if (prepare_cede_notself (aTHX_ &ta))
		1458	{
		1459	TRANSFER (ta);
		1460	return 1;
		1461	}
		1462	else
		1463	return 0;
		1464	}
		1465
		1466	static void
		1467	api_trace (SV *coro_sv, int flags)
		1468	{
		1469	dTHX;
		1470	struct coro *coro = SvSTATE (coro_sv);
		1471
		1472	if (flags & CC_TRACE)
		1473	{
		1474	if (!coro->cctx)
		1475	coro->cctx = cctx_new ();
		1476	else if (!(coro->cctx->flags & CC_TRACE))
		1477	croak ("cannot enable tracing on coroutine with custom stack");
		1478
		1479	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1480	}
		1481	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1482	{
		1483	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1484
		1485	if (coro->flags & CF_RUNNING)
		1486	PL_runops = RUNOPS_DEFAULT;
		1487	else
		1488	coro->slot->runops = RUNOPS_DEFAULT;
		1489	}
		1490	}
		1491
748	MODULE = Coro::State PACKAGE = Coro::State	1492	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
749		1493
750	PROTOTYPES: ENABLE	1494	PROTOTYPES: DISABLE
751		1495
752	BOOT:	1496	BOOT:
753	{ /* {} necessary for stoopid perl-5.6.x */	1497	{
754	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1498	#ifdef USE_ITHREADS
755	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1499	MUTEX_INIT (&coro_mutex);
		1500	#endif
		1501	BOOT_PAGESIZE;
		1502
		1503	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1504	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1505
		1506	hv_sig = coro_get_hv ("SIG", TRUE);
		1507	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1508	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1509
		1510	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1511	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1512
756	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1513	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
757		1514
758	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1515	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
759	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
760	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
761	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
762
763	if (!padlist_cache)
764	padlist_cache = newHV ();
765		1519
766	main_mainstack = PL_mainstack;	1520	main_mainstack = PL_mainstack;
767	}	1521	main_top_env = PL_top_env;
768		1522
769	Coro::State	1523	while (main_top_env->je_prev)
770	_newprocess(args)	1524	main_top_env = main_top_env->je_prev;
771	SV * args	1525
772	PROTOTYPE: $	1526	coroapi.ver = CORO_API_VERSION;
		1527	coroapi.transfer = api_transfer;
		1528
		1529	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1530	}
		1531
		1532	SV *
		1533	new (char *klass, ...)
773	CODE:	1534	CODE:
774	Coro__State coro;	1535	{
		1536	struct coro *coro;
		1537	HV *hv;
		1538	int i;
775		1539
776	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
777	croak ("Coro::State::_newprocess expects an arrayref");
778
779	New (0, coro, 1, struct coro);	1540	Newz (0, coro, 1, struct coro);
		1541	coro->args = newAV ();
		1542	coro->flags = CF_NEW;
780		1543
781	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1544	if (coro_first) coro_first->prev = coro;
782	coro->mainstack = 0; /* actual work is done inside transfer */	1545	coro->next = coro_first;
783	coro->stack = 0;	1546	coro_first = coro;
784		1547
785	RETVAL = coro;	1548	coro->hv = hv = newHV ();
		1549	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1550	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1551
		1552	av_extend (coro->args, items - 1);
		1553	for (i = 1; i < items; i++)
		1554	av_push (coro->args, newSVsv (ST (i)));
		1555	}
786	OUTPUT:	1556	OUTPUT:
787	RETVAL	1557	RETVAL
788		1558
		1559	# these not obviously related functions are all rolled into the same xs
		1560	# function to increase chances that they all will call transfer with the same
		1561	# stack offset
789	void	1562	void
790	transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK)	1563	_set_stacklevel (...)
791	Coro::State_or_hashref prev	1564	ALIAS:
792	Coro::State_or_hashref next	1565	Coro::State::transfer = 1
793	int flags	1566	Coro::schedule = 2
794	PROTOTYPE: @	1567	Coro::cede = 3
		1568	Coro::cede_notself = 4
795	CODE:	1569	CODE:
796	transfer (aTHX_ prev, next, flags);	1570	{
		1571	struct transfer_args ta;
		1572
		1573	switch (ix)
		1574	{
		1575	case 0:
		1576	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1577	ta.next = 0;
		1578	break;
		1579
		1580	case 1:
		1581	if (items != 2)
		1582	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1583
		1584	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1585	break;
		1586
		1587	case 2:
		1588	prepare_schedule (aTHX_ &ta);
		1589	break;
		1590
		1591	case 3:
		1592	prepare_cede (aTHX_ &ta);
		1593	break;
		1594
		1595	case 4:
		1596	if (!prepare_cede_notself (aTHX_ &ta))
		1597	XSRETURN_EMPTY;
		1598
		1599	break;
		1600	}
		1601
		1602	BARRIER;
		1603	TRANSFER (ta);
		1604
		1605	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1606	XSRETURN_YES;
		1607	}
		1608
		1609	bool
		1610	_destroy (SV *coro_sv)
		1611	CODE:
		1612	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1613	OUTPUT:
		1614	RETVAL
797		1615
798	void	1616	void
799	DESTROY(coro)	1617	_exit (code)
800	Coro::State coro	1618	int code
801	CODE:	1619	PROTOTYPE: $
		1620	CODE:
		1621	_exit (code);
802		1622
803	if (coro->mainstack && coro->mainstack != main_mainstack)	1623	int
		1624	cctx_stacksize (int new_stacksize = 0)
		1625	CODE:
		1626	RETVAL = coro_stacksize;
		1627	if (new_stacksize)
		1628	coro_stacksize = new_stacksize;
		1629	OUTPUT:
		1630	RETVAL
		1631
		1632	int
		1633	cctx_count ()
		1634	CODE:
		1635	RETVAL = cctx_count;
		1636	OUTPUT:
		1637	RETVAL
		1638
		1639	int
		1640	cctx_idle ()
		1641	CODE:
		1642	RETVAL = cctx_idle;
		1643	OUTPUT:
		1644	RETVAL
		1645
		1646	void
		1647	list ()
		1648	PPCODE:
		1649	{
		1650	struct coro *coro;
		1651	for (coro = coro_first; coro; coro = coro->next)
		1652	if (coro->hv)
		1653	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1654	}
		1655
		1656	void
		1657	call (Coro::State coro, SV *coderef)
		1658	ALIAS:
		1659	eval = 1
		1660	CODE:
		1661	{
		1662	if (coro->mainstack)
804	{	1663	{
805	struct coro temp;	1664	struct coro temp;
806		1665
807	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1666	if (!(coro->flags & CF_RUNNING))
808	LOAD(aTHX_ coro);	1667	{
		1668	save_perl (aTHX_ &temp);
		1669	load_perl (aTHX_ coro);
		1670	}
809		1671
810	destroy_stacks (aTHX);	1672	{
		1673	dSP;
		1674	ENTER;
		1675	SAVETMPS;
		1676	PUSHMARK (SP);
		1677	PUTBACK;
811		1678
812	LOAD((&temp)); /* this will get rid of defsv etc.. */	1679	if (ix)
		1680	eval_sv (coderef, 0);
		1681	else
		1682	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
813		1683
814	coro->mainstack = 0;	1684	SPAGAIN;
		1685	FREETMPS;
		1686	LEAVE;
		1687	PUTBACK;
		1688	}
		1689
		1690	if (!(coro->flags & CF_RUNNING))
		1691	{
		1692	save_perl (aTHX_ coro);
		1693	load_perl (aTHX_ &temp);
		1694	}
815	}	1695	}
		1696	}
816		1697
817	deallocate_stack (coro);	1698	SV *
818		1699	is_ready (Coro::State coro)
819	Safefree (coro);	1700	PROTOTYPE: $
		1701	ALIAS:
		1702	is_ready = CF_READY
		1703	is_running = CF_RUNNING
		1704	is_new = CF_NEW
		1705	is_destroyed = CF_DESTROYED
		1706	CODE:
		1707	RETVAL = boolSV (coro->flags & ix);
		1708	OUTPUT:
		1709	RETVAL
820		1710
821	void	1711	void
822	flush()	1712	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1713
		1714	SV *
		1715	has_stack (Coro::State coro)
		1716	PROTOTYPE: $
823	CODE:	1717	CODE:
824	#ifdef MAY_FLUSH	1718	RETVAL = boolSV (!!coro->cctx);
825	flush_padlist_cache ();	1719	OUTPUT:
826	#endif	1720	RETVAL
827		1721
		1722	int
		1723	is_traced (Coro::State coro)
		1724	PROTOTYPE: $
		1725	CODE:
		1726	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1727	OUTPUT:
		1728	RETVAL
		1729
		1730	IV
		1731	rss (Coro::State coro)
		1732	PROTOTYPE: $
		1733	ALIAS:
		1734	usecount = 1
		1735	CODE:
		1736	switch (ix)
		1737	{
		1738	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1739	case 1: RETVAL = coro->usecount; break;
		1740	}
		1741	OUTPUT:
		1742	RETVAL
		1743
		1744
828	MODULE = Coro::State PACKAGE = Coro::Cont	1745	MODULE = Coro::State PACKAGE = Coro
829		1746
830	# this is slightly dirty	1747	BOOT:
		1748	{
		1749	int i;
		1750
		1751	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1752	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1753	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1754
		1755	coro_current = coro_get_sv ("Coro::current", FALSE);
		1756	SvREADONLY_on (coro_current);
		1757
		1758	coro_stash = gv_stashpv ("Coro", TRUE);
		1759
		1760	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1761	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1762	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1763	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1764	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1765	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1766
		1767	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1768	coro_ready[i] = newAV ();
		1769
		1770	{
		1771	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1772	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
		1773
		1774	coroapi.schedule = api_schedule;
		1775	coroapi.cede = api_cede;
		1776	coroapi.cede_notself = api_cede_notself;
		1777	coroapi.ready = api_ready;
		1778	coroapi.is_ready = api_is_ready;
		1779	coroapi.nready = &coro_nready;
		1780	coroapi.current = coro_current;
		1781
		1782	GCoroAPI = &coroapi;
		1783	sv_setiv (sv, (IV)&coroapi);
		1784	SvREADONLY_on (sv);
		1785	}
		1786	}
831		1787
832	void	1788	void
833	yield(...)	1789	_set_current (SV *current)
834	PROTOTYPE: @	1790	PROTOTYPE: $
		1791	CODE:
		1792	SvREFCNT_dec (SvRV (coro_current));
		1793	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1794
		1795	int
		1796	prio (Coro::State coro, int newprio = 0)
		1797	ALIAS:
		1798	nice = 1
835	CODE:	1799	CODE:
836	static SV *returnstk;	1800	{
837	SV *sv;	1801	RETVAL = coro->prio;
		1802
		1803	if (items > 1)
		1804	{
		1805	if (ix)
		1806	newprio = coro->prio - newprio;
		1807
		1808	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1809	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1810
		1811	coro->prio = newprio;
		1812	}
		1813	}
		1814	OUTPUT:
		1815	RETVAL
		1816
		1817	SV *
		1818	ready (SV *self)
		1819	PROTOTYPE: $
		1820	CODE:
		1821	RETVAL = boolSV (api_ready (self));
		1822	OUTPUT:
		1823	RETVAL
		1824
		1825	int
		1826	nready (...)
		1827	PROTOTYPE:
		1828	CODE:
		1829	RETVAL = coro_nready;
		1830	OUTPUT:
		1831	RETVAL
		1832
		1833	void
		1834	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1835	PROTOTYPE: $;$
		1836	CODE:
		1837	SvREFCNT_dec (self->throw);
		1838	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1839
		1840	# for async_pool speedup
		1841	void
		1842	_pool_1 (SV *cb)
		1843	CODE:
		1844	{
		1845	struct coro *coro = SvSTATE (coro_current);
		1846	HV *hv = (HV *)SvRV (coro_current);
838	AV *defav = GvAV (PL_defgv);	1847	AV *defav = GvAV (PL_defgv);
839	struct coro *prev, *next;	1848	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1849	AV *invoke_av;
		1850	int i, len;
840		1851
841	if (!returnstk)	1852	if (!invoke)
842	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1853	croak ("\3async_pool terminate\2\n");
843		1854
844	/* set up @_ -- ugly */	1855	SvREFCNT_dec (coro->saved_deffh);
845	av_clear (defav);	1856	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1857
		1858	hv_store (hv, "desc", sizeof ("desc") - 1,
		1859	newSVpvn (strpair ("[async_pool]")), 0);
		1860
		1861	invoke_av = (AV *)SvRV (invoke);
		1862	len = av_len (invoke_av);
		1863
		1864	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1865
		1866	if (len > 0)
		1867	{
846	av_fill (defav, items - 1);	1868	av_fill (defav, len - 1);
847	while (items--)	1869	for (i = 0; i < len; ++i)
848	av_store (defav, items, SvREFCNT_inc (ST(items)));	1870	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1871	}
849		1872
850	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
851	sv = av_pop ((AV *)SvRV (returnstk));
852	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
853	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
854	SvREFCNT_dec (sv);	1873	SvREFCNT_dec (invoke);
		1874	}
855		1875
856	transfer(aTHX_ prev, next, 0);	1876	void
		1877	_pool_2 (SV *cb)
		1878	CODE:
		1879	{
		1880	struct coro *coro = SvSTATE (coro_current);
857		1881
		1882	sv_setsv (cb, &PL_sv_undef);
		1883
		1884	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1885	coro->saved_deffh = 0;
		1886
		1887	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1888	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1889	croak ("\3async_pool terminate\2\n");
		1890
		1891	av_clear (GvAV (PL_defgv));
		1892	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1893	newSVpvn (strpair ("[async_pool idle]")), 0);
		1894
		1895	coro->prio = 0;
		1896
		1897	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1898	api_trace (coro_current, 0);
		1899
		1900	av_push (av_async_pool, newSVsv (coro_current));
		1901	}
		1902
		1903
		1904	MODULE = Coro::State PACKAGE = Coro::AIO
		1905
		1906	SV *
		1907	_get_state ()
		1908	CODE:
		1909	{
		1910	struct io_state *data;
		1911
		1912	RETVAL = newSV (sizeof (struct io_state));
		1913	data = (struct io_state *)SvPVX (RETVAL);
		1914	SvCUR_set (RETVAL, sizeof (struct io_state));
		1915	SvPOK_only (RETVAL);
		1916
		1917	data->errorno = errno;
		1918	data->laststype = PL_laststype;
		1919	data->laststatval = PL_laststatval;
		1920	data->statcache = PL_statcache;
		1921	}
		1922	OUTPUT:
		1923	RETVAL
		1924
		1925	void
		1926	_set_state (char *data_)
		1927	PROTOTYPE: $
		1928	CODE:
		1929	{
		1930	struct io_state *data = (void *)data_;
		1931
		1932	errno = data->errorno;
		1933	PL_laststype = data->laststype;
		1934	PL_laststatval = data->laststatval;
		1935	PL_statcache = data->statcache;
		1936	}
		1937

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