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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs.
Revision 1.239 by root, Sat Jun 28 23:14:19 2008 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"
6		11
7	#include <signal.h>	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
8		24
9	#ifdef HAVE_MMAP	25	#ifdef HAVE_MMAP
10	# include <unistd.h>	26	# include <unistd.h>
11	# include <sys/mman.h>	27	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	28	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	29	# ifdef MAP_ANON
		30	# define MAP_ANONYMOUS MAP_ANON
15	# else	31	# else
16	# undef HAVE_MMAP	32	# undef HAVE_MMAP
17	# endif	33	# endif
18	# endif	34	# endif
		35	# include <limits.h>
		36	# ifndef PAGESIZE
		37	# define PAGESIZE pagesize
		38	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		39	static long pagesize;
		40	# else
		41	# define BOOT_PAGESIZE (void)0
19	#endif	42	# endif
20
21	#define MAY_FLUSH /* increases codesize */
22
23	/* perl-related */
24	#define TRANSFER_SAVE_DEFAV 0x00000001
25	#define TRANSFER_SAVE_DEFSV 0x00000002
26	#define TRANSFER_SAVE_ERRSV 0x00000004
27	/* c-related */
28	#define TRANSFER_SAVE_CCTXT 0x00000008
29	#ifdef CORO_LAZY_STACK
30	# define TRANSFER_LAZY_STACK 0x00000010
31	#else	43	#else
32	# define TRANSFER_LAZY_STACK 0x00000000	44	# define PAGESIZE 0
		45	# define BOOT_PAGESIZE (void)0
		46	#endif
		47
		48	#if CORO_USE_VALGRIND
		49	# include <valgrind/valgrind.h>
		50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
		53	#endif
		54
		55	/* the maximum number of idle cctx that will be pooled */
		56	#define MAX_IDLE_CCTX 8
		57
		58	#define PERL_VERSION_ATLEAST(a,b,c) \
		59	(PERL_REVISION > (a) \
		60	|| (PERL_REVISION == (a) \
		61	&& (PERL_VERSION > (b) \
		62	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		63
		64	#if !PERL_VERSION_ATLEAST (5,6,0)
		65	# ifndef PL_ppaddr
		66	# define PL_ppaddr ppaddr
33	#endif	67	# endif
		68	# ifndef call_sv
		69	# define call_sv perl_call_sv
		70	# endif
		71	# ifndef get_sv
		72	# define get_sv perl_get_sv
		73	# endif
		74	# ifndef get_cv
		75	# define get_cv perl_get_cv
		76	# endif
		77	# ifndef IS_PADGV
		78	# define IS_PADGV(v) 0
		79	# endif
		80	# ifndef IS_PADCONST
		81	# define IS_PADCONST(v) 0
		82	# endif
		83	#endif
34		84
35	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \	85	/* 5.8.8 */
36	|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)	86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
37		92
38	#define SUB_INIT "Coro::State::initialize"	93	/* 5.11 */
39	#define UCORO_STATE "_coro_state"	94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
40		97
41	/* The next macro should delcare a variable stacklevel that contains and approximation	98	/* 5.8.7 */
42	* to the current C stack pointer. It's property is that it changes with each call	99	#ifndef SvRV_set
43	* and should be unique. */	100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
		102
		103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		104	# undef CORO_STACKGUARD
		105	#endif
		106
		107	#ifndef CORO_STACKGUARD
		108	# define CORO_STACKGUARD 0
		109	#endif
		110
		111	/* prefer perl internal functions over our own? */
		112	#ifndef CORO_PREFER_PERL_FUNCTIONS
		113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
		115
		116	/* The next macros try to return the current stack pointer, in an as
		117	* portable way as possible. */
		118	#define dSTACKLEVEL volatile char stacklevel
44	#define dSTACKLEVEL void *stacklevel = &stacklevel	119	#define STACKLEVEL ((void *)&stacklevel)
45		120
46	#define labs(l) ((l) >= 0 ? (l) : -(l))	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
47		122
48	/* this is actually not only the c stack but also c registers etc... */	123	#if __GNUC__ >= 3
		124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
		131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
		135
		136	#define NOINLINE attribute ((noinline))
		137
		138	#include "CoroAPI.h"
		139
		140	#ifdef USE_ITHREADS
		141	static perl_mutex coro_mutex;
		142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		144	#else
		145	# define LOCK (void)0
		146	# define UNLOCK (void)0
		147	#endif
		148
		149	/* helper storage struct for Coro::AIO */
		150	struct io_state
		151	{
		152	int errorno;
		153	I32 laststype;
		154	int laststatval;
		155	Stat_t statcache;
		156	};
		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
		159	static struct CoroAPI coroapi;
		160	static AV *main_mainstack; /* used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
		162	static HV *coro_state_stash, *coro_stash;
		163	static volatile SV *coro_mortal; /* will be freed after next transfer */
		164
		165	static GV *irsgv; /* $/ */
		166	static GV *stdoutgv; /* *STDOUT */
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV *hv_sig; /* %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	/* Coro::AnyEvent */
		177	static SV *sv_activity;
		178
		179	static struct coro_cctx *cctx_first;
		180	static int cctx_count, cctx_idle;
		181
		182	enum {
		183	CC_MAPPED = 0x01,
		184	CC_NOREUSE = 0x02, /* throw this away after tracing */
		185	CC_TRACE = 0x04,
		186	CC_TRACE_SUB = 0x08, /* trace sub calls */
		187	CC_TRACE_LINE = 0x10, /* trace each statement */
		188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		189	};
		190
		191	/* this is a structure representing a c-level coroutine */
		192	typedef struct coro_cctx {
		193	struct coro_cctx *next;
		194
		195	/* the stack */
		196	void *sptr;
		197	size_t ssize;
		198
		199	/* cpu state */
		200	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		201	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		202	JMPENV *top_env;
		203	coro_context cctx;
		204
		205	#if CORO_USE_VALGRIND
		206	int valgrind_id;
		207	#endif
		208	unsigned char flags;
		209	} coro_cctx;
		210
		211	enum {
		212	CF_RUNNING = 0x0001, /* coroutine is running */
		213	CF_READY = 0x0002, /* coroutine is ready */
		214	CF_NEW = 0x0004, /* has never been switched to */
		215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		216	};
		217
		218	/* the structure where most of the perl state is stored, overlaid on the cxstack */
49	typedef struct {	219	typedef struct {
50	int refcnt; /* pointer reference counter */	220	SV *defsv;
51	int usecnt; /* shared by how many coroutines */	221	AV *defav;
52	int gencnt; /* generation counter */	222	SV *errsv;
		223	SV *irsgv;
		224	#define VAR(name,type) type name;
		225	# include "state.h"
		226	#undef VAR
		227	} perl_slots;
53		228
54	coro_context cctx;	229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
55		230
56	void *sptr;	231	/* this is a structure representing a perl-level coroutine */
57	long ssize; /* positive == mmap, otherwise malloc */
58	} coro_stack;
59
60	struct coro {	232	struct coro {
61	/* the optional C context */	233	/* the c coroutine allocated to this perl coroutine, if any */
62	coro_stack *stack;	234	coro_cctx *cctx;
63	void *cursp;
64	int gencnt;
65		235
66	/* optionally saved, might be zero */	236	/* process data */
67	AV *defav;
68	SV *defsv;
69	SV *errsv;
70
71	/* saved global state not related to stacks */
72	U8 dowarn;
73	I32 in_eval;
74
75	/* the stacks and related info (callchain etc..) */
76	PERL_SI *curstackinfo;
77	AV *curstack;
78	AV *mainstack;	237	AV *mainstack;
79	SV **stack_sp;	238	perl_slots *slot; /* basically the saved sp */
80	OP *op;
81	SV **curpad;
82	SV **stack_base;
83	SV **stack_max;
84	SV **tmps_stack;
85	I32 tmps_floor;
86	I32 tmps_ix;
87	I32 tmps_max;
88	I32 *markstack;
89	I32 *markstack_ptr;
90	I32 *markstack_max;
91	I32 *scopestack;
92	I32 scopestack_ix;
93	I32 scopestack_max;
94	ANY *savestack;
95	I32 savestack_ix;
96	I32 savestack_max;
97	OP **retstack;
98	I32 retstack_ix;
99	I32 retstack_max;
100	COP *curcop;
101	JMPENV *top_env;
102		239
103	/* data associated with this coroutine (initial args) */	240	AV *args; /* data associated with this coroutine (initial args) */
104	AV *args;	241	int refcnt; /* coroutines are refcounted, yes */
		242	int flags; /* CF_ flags */
		243	HV *hv; /* the perl hash associated with this coro, if any */
		244
		245	/* statistics */
		246	int usecount; /* number of transfers to this coro */
		247
		248	/* coro process data */
		249	int prio;
		250	SV *throw; /* exception to be thrown */
		251
		252	/* async_pool */
		253	SV *saved_deffh;
		254
		255	/* linked list */
		256	struct coro *next, *prev;
105	};	257	};
106		258
107	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
109		261
110	static AV *main_mainstack; /* used to differentiate between $main and others */	262	/** Coro ********************************************************************/
111	static HV *coro_state_stash;	263
112	static SV *ucoro_state_sv;	264	#define PRIO_MAX 3
113	static U32 ucoro_state_hash;	265	#define PRIO_HIGH 1
114	static HV *padlist_cache;	266	#define PRIO_NORMAL 0
		267	#define PRIO_LOW -1
		268	#define PRIO_IDLE -3
		269	#define PRIO_MIN -4
115		270
116	/* for Coro.pm */	271	/* for Coro.pm */
117	static GV *coro_current, *coro_idle;	272	static SV *coro_current;
118	static AV *coro_ready;	273	static SV *coro_readyhook;
		274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		275	static int coro_nready;
		276	static struct coro *coro_first;
119		277
120	/* mostly copied from op.c:cv_clone2 */	278	/** lowlevel stuff **********************************************************/
121	STATIC AV *	279
122	clone_padlist (AV *protopadlist)	280	static SV *
		281	coro_get_sv (pTHX_ const char *name, int create)
123	{	282	{
124	AV *av;	283	#if PERL_VERSION_ATLEAST (5,10,0)
125	I32 ix;	284	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
126	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	285	get_sv (name, create);
127	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	286	#endif
128	SV **pname = AvARRAY (protopad_name);	287	return get_sv (name, create);
129	SV **ppad = AvARRAY (protopad);	288	}
130	I32 fname = AvFILLp (protopad_name);	289
131	I32 fpad = AvFILLp (protopad);	290	static AV *
		291	coro_get_av (pTHX_ const char *name, int create)
		292	{
		293	#if PERL_VERSION_ATLEAST (5,10,0)
		294	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		295	get_av (name, create);
		296	#endif
		297	return get_av (name, create);
		298	}
		299
		300	static HV *
		301	coro_get_hv (pTHX_ const char *name, int create)
		302	{
		303	#if PERL_VERSION_ATLEAST (5,10,0)
		304	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		305	get_hv (name, create);
		306	#endif
		307	return get_hv (name, create);
		308	}
		309
		310	static AV *
		311	coro_clone_padlist (pTHX_ CV *cv)
		312	{
		313	AV *padlist = CvPADLIST (cv);
132	AV *newpadlist, *newpad_name, *newpad;	314	AV *newpadlist, *newpad;
133	SV **npad;
134
135	newpad_name = newAV ();
136	for (ix = fname; ix >= 0; ix--)
137	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
138
139	newpad = newAV ();
140	av_fill (newpad, AvFILLp (protopad));
141	npad = AvARRAY (newpad);
142		315
143	newpadlist = newAV ();	316	newpadlist = newAV ();
144	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
145	av_store (newpadlist, 0, (SV *) newpad_name);	318	#if PERL_VERSION_ATLEAST (5,10,0)
		319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		320	#else
		321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		322	#endif
		323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		324	--AvFILLp (padlist);
		325
		326	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
146	av_store (newpadlist, 1, (SV *) newpad);	327	av_store (newpadlist, 1, (SV *)newpad);
147		328
148	av = newAV (); /* will be @_ */	329	return newpadlist;
149	av_extend (av, 0);	330	}
150	av_store (newpad, 0, (SV *) av);
151	AvFLAGS (av) = AVf_REIFY;
152		331
153	for (ix = fpad; ix > 0; ix--)	332	static void
		333	free_padlist (pTHX_ AV *padlist)
		334	{
		335	/* may be during global destruction */
		336	if (SvREFCNT (padlist))
154	{	337	{
155	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	338	I32 i = AvFILLp (padlist);
156	if (namesv && namesv != &PL_sv_undef)	339	while (i >= 0)
157	{	340	{
158	char *name = SvPVX (namesv); /* XXX */	341	SV **svp = av_fetch (padlist, i--, FALSE);
159	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	342	if (svp)
160	{ /* lexical from outside? */
161	npad[ix] = SvREFCNT_inc (ppad[ix]);
162	}	343	{
163	else
164	{ /* our own lexical */
165	SV *sv;	344	SV *sv;
166	if (*name == '&')	345	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
167	sv = SvREFCNT_inc (ppad[ix]);	346	SvREFCNT_dec (sv);
168	else if (*name == '@')	347
169	sv = (SV *) newAV ();	348	SvREFCNT_dec (*svp);
170	else if (*name == '%')
171	sv = (SV *) newHV ();
172	else
173	sv = NEWSV (0, 0);
174	if (!SvPADBUSY (sv))
175	SvPADMY_on (sv);
176	npad[ix] = sv;
177	}	349	}
178	}	350	}
179	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
180	{
181	npad[ix] = SvREFCNT_inc (ppad[ix]);
182	}
183	else
184	{
185	SV *sv = NEWSV (0, 0);
186	SvPADTMP_on (sv);
187	npad[ix] = sv;
188	}
189	}
190		351
191	#if 0 /* return -ENOTUNDERSTOOD */
192	/* Now that vars are all in place, clone nested closures. */
193
194	for (ix = fpad; ix > 0; ix--) {
195	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
196	if (namesv
197	&& namesv != &PL_sv_undef
198	&& !(SvFLAGS(namesv) & SVf_FAKE)
199	&& *SvPVX(namesv) == '&'
200	&& CvCLONE(ppad[ix]))
201	{
202	CV *kid = cv_clone((CV*)ppad[ix]);
203	SvREFCNT_dec(ppad[ix]);
204	CvCLONE_on(kid);
205	SvPADMY_on(kid);
206	npad[ix] = (SV*)kid;
207	}
208	}
209	#endif
210
211	return newpadlist;
212	}
213
214	#ifdef MAY_FLUSH
215	STATIC AV *
216	free_padlist (AV *padlist)
217	{
218	/* may be during global destruction */
219	if (SvREFCNT(padlist))
220	{
221	I32 i = AvFILLp(padlist);
222	while (i >= 0)
223	{
224	SV **svp = av_fetch(padlist, i--, FALSE);
225	SV *sv = svp ? *svp : Nullsv;
226	if (sv)
227	SvREFCNT_dec(sv);
228	}
229
230	SvREFCNT_dec((SV*)padlist);	352	SvREFCNT_dec ((SV*)padlist);
231	}	353	}
232	}	354	}
233	#endif	355
		356	static int
		357	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		358	{
		359	AV *padlist;
		360	AV *av = (AV *)mg->mg_obj;
		361
		362	/* casting is fun. */
		363	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		364	free_padlist (aTHX_ padlist);
		365
		366	return 0;
		367	}
		368
		369	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		370	#define CORO_MAGIC_type_state PERL_MAGIC_ext
		371
		372	static MGVTBL coro_cv_vtbl = {
		373	0, 0, 0, 0,
		374	coro_cv_free
		375	};
		376
		377	#define CORO_MAGIC(sv,type) \
		378	SvMAGIC (sv) \
		379	? SvMAGIC (sv)->mg_type == type \
		380	? SvMAGIC (sv) \
		381	: mg_find (sv, type) \
		382	: 0
		383
		384	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		385	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		386
		387	static struct coro *
		388	SvSTATE_ (pTHX_ SV *coro)
		389	{
		390	HV *stash;
		391	MAGIC *mg;
		392
		393	if (SvROK (coro))
		394	coro = SvRV (coro);
		395
		396	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		397	croak ("Coro::State object required");
		398
		399	stash = SvSTASH (coro);
		400	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		401	{
		402	/* very slow, but rare, check */
		403	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		404	croak ("Coro::State object required");
		405	}
		406
		407	mg = CORO_MAGIC_state (coro);
		408	return (struct coro *)mg->mg_ptr;
		409	}
		410
		411	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
234		412
235	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
236	STATIC void	414	static void
237	get_padlist (CV *cv)	415	get_padlist (pTHX_ CV *cv)
238	{	416	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
		418	AV *av;
240		419
241	if (he && AvFILLp ((AV *)*he) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	422	else
244	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
245	}
246
247	STATIC void
248	put_padlist (CV *cv)
249	{
250	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
251
252	if (SvTYPE (*he) != SVt_PVAV)
253	{	423	{
		424	#if CORO_PREFER_PERL_FUNCTIONS
		425	/* this is probably cleaner, but also slower? */
		426	CV *cp = Perl_cv_clone (cv);
		427	CvPADLIST (cv) = CvPADLIST (cp);
		428	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (*he);	429	SvREFCNT_dec (cp);
255	*he = (SV *)newAV ();	430	#else
		431	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		432	#endif
256	}	433	}
257
258	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
259	}	434	}
260
261	#ifdef MAY_FLUSH
262	STATIC void
263	flush_padlist_cache ()
264	{
265	HV *hv = padlist_cache;
266	padlist_cache = newHV ();
267
268	if (hv_iterinit (hv))
269	{
270	HE *he;
271	AV *padlist;
272
273	while (!!(he = hv_iternext (hv)))
274	{
275	AV *av = (AV *)HeVAL(he);
276
277	/* casting is fun. */
278	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
279	free_padlist (padlist);
280	}
281	}
282
283	SvREFCNT_dec (hv);
284	}
285	#endif
286
287	#define SB do {
288	#define SE } while (0)
289
290	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
291	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
292
293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
294		435
295	static void	436	static void
		437	put_padlist (pTHX_ CV *cv)
		438	{
		439	MAGIC *mg = CORO_MAGIC_cv (cv);
		440	AV *av;
		441
		442	if (expect_false (!mg))
		443	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
		444
		445	av = (AV *)mg->mg_obj;
		446
		447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		448	av_extend (av, AvMAX (av) + 1);
		449
		450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		451	}
		452
		453	/** load & save, init *******************************************************/
		454
		455	static void
296	load_state(pTHX_ Coro__State c)	456	load_perl (pTHX_ Coro__State c)
297	{	457	{
298	PL_dowarn = c->dowarn;	458	perl_slots *slot = c->slot;
299	PL_in_eval = c->in_eval;	459	c->slot = 0;
300		460
301	PL_curstackinfo = c->curstackinfo;
302	PL_curstack = c->curstack;
303	PL_mainstack = c->mainstack;	461	PL_mainstack = c->mainstack;
304	PL_stack_sp = c->stack_sp;
305	PL_op = c->op;
306	PL_curpad = c->curpad;
307	PL_stack_base = c->stack_base;
308	PL_stack_max = c->stack_max;
309	PL_tmps_stack = c->tmps_stack;
310	PL_tmps_floor = c->tmps_floor;
311	PL_tmps_ix = c->tmps_ix;
312	PL_tmps_max = c->tmps_max;
313	PL_markstack = c->markstack;
314	PL_markstack_ptr = c->markstack_ptr;
315	PL_markstack_max = c->markstack_max;
316	PL_scopestack = c->scopestack;
317	PL_scopestack_ix = c->scopestack_ix;
318	PL_scopestack_max = c->scopestack_max;
319	PL_savestack = c->savestack;
320	PL_savestack_ix = c->savestack_ix;
321	PL_savestack_max = c->savestack_max;
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	PL_curcop = c->curcop;
326	PL_top_env = c->top_env;
327		462
328	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	463	GvSV (PL_defgv) = slot->defsv;
329	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	464	GvAV (PL_defgv) = slot->defav;
330	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	465	GvSV (PL_errgv) = slot->errsv;
		466	GvSV (irsgv) = slot->irsgv;
		467
		468	#define VAR(name,type) PL_ ## name = slot->name;
		469	# include "state.h"
		470	#undef VAR
331		471
332	{	472	{
333	dSP;	473	dSP;
		474
334	CV *cv;	475	CV *cv;
335		476
336	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
337	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
338	{	479	{
339	AV *padlist = (AV *)POPs;
340
341	if (padlist)
342	{
343	put_padlist (cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
344	CvPADLIST(cv) = padlist;	481	CvDEPTH (cv) = PTR2IV (POPs);
345	#ifdef USE_THREADS	482	CvPADLIST (cv) = (AV *)POPs;
346	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
347	#endif
348	}
349
350	++CvDEPTH(cv);
351	}	483	}
352		484
353	PUTBACK;	485	PUTBACK;
354	}	486	}
355	}	487	}
356		488
357	static void	489	static void
358	save_state(pTHX_ Coro__State c, int flags)	490	save_perl (pTHX_ Coro__State c)
359	{	491	{
360	{	492	{
361	dSP;	493	dSP;
362	I32 cxix = cxstack_ix;	494	I32 cxix = cxstack_ix;
363	PERL_CONTEXT *ccstk = cxstack;	495	PERL_CONTEXT *ccstk = cxstack;
…		…
366	/*	498	/*
367	* the worst thing you can imagine happens first - we have to save	499	* the worst thing you can imagine happens first - we have to save
368	* (and reinitialize) all cv's in the whole callchain :(	500	* (and reinitialize) all cv's in the whole callchain :(
369	*/	501	*/
370		502
371	PUSHs (Nullsv);	503	XPUSHs (Nullsv);
372	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
373	for (;;)	505	for (;;)
374	{	506	{
375	do	507	while (expect_true (cxix >= 0))
376	{	508	{
377	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
378		510
379	if (CxTYPE(cx) == CXt_SUB)	511	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
380	{	512	{
381	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
		514
382	if (CvDEPTH(cv))	515	if (expect_true (CvDEPTH (cv)))
383	{	516	{
384	#ifdef USE_THREADS
385	/*XPUSHs ((SV *)CvOWNER(cv));*/
386	/*CvOWNER(cv) = 0;*/
387	/*error must unlock this cv etc.. etc...*/
388	#endif
389	EXTEND (SP, CvDEPTH(cv)*2);	517	EXTEND (SP, 3);
390
391	while (--CvDEPTH(cv))
392	{
393	/* this tells the restore code to increment CvDEPTH */
394	PUSHs (Nullsv);
395	PUSHs ((SV *)cv);
396	}
397
398	PUSHs ((SV *)CvPADLIST(cv));	518	PUSHs ((SV *)CvPADLIST (cv));
		519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
399	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
400		521
401	get_padlist (cv); /* this is a monster */	522	CvDEPTH (cv) = 0;
		523	get_padlist (aTHX_ cv);
402	}	524	}
403	}	525	}
404	else if (CxTYPE(cx) == CXt_FORMAT)
405	{
406	/* I never used formats, so how should I know how these are implemented? */
407	/* my bold guess is as a simple, plain sub... */
408	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
409	}
410	}	526	}
411	while (cxix >= 0);
412		527
413	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
414	break;	529	break;
415		530
416	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
417	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
418	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
419	}	534	}
420		535
421	PUTBACK;	536	PUTBACK;
422	}	537	}
423		538
424	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	539	/* allocate some space on the context stack for our purposes */
425	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
426	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	541	if (SLOT_COUNT >= 1) CXINC;
		542	if (SLOT_COUNT >= 2) CXINC;
		543	if (SLOT_COUNT >= 3) CXINC;
		544	{
		545	int i;
		546	for (i = 3; i < SLOT_COUNT; ++i)
		547	CXINC;
		548	}
		549	cxstack_ix -= SLOT_COUNT; /* undo allocation */
427		550
428	/* I have not the slightest idea of why av_reify is necessary */
429	/* but if it's missing the defav contents magically get replaced sometimes */
430	if (c->defav)
431	av_reify (c->defav);
432
433	c->dowarn = PL_dowarn;
434	c->in_eval = PL_in_eval;
435
436	c->curstackinfo = PL_curstackinfo;
437	c->curstack = PL_curstack;
438	c->mainstack = PL_mainstack;	551	c->mainstack = PL_mainstack;
439	c->stack_sp = PL_stack_sp;	552
440	c->op = PL_op;	553	{
441	c->curpad = PL_curpad;	554	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
442	c->stack_base = PL_stack_base;	555
443	c->stack_max = PL_stack_max;	556	slot->defav = GvAV (PL_defgv);
444	c->tmps_stack = PL_tmps_stack;	557	slot->defsv = DEFSV;
445	c->tmps_floor = PL_tmps_floor;	558	slot->errsv = ERRSV;
446	c->tmps_ix = PL_tmps_ix;	559	slot->irsgv = GvSV (irsgv);
447	c->tmps_max = PL_tmps_max;	560
448	c->markstack = PL_markstack;	561	#define VAR(name,type) slot->name = PL_ ## name;
449	c->markstack_ptr = PL_markstack_ptr;	562	# include "state.h"
450	c->markstack_max = PL_markstack_max;	563	#undef VAR
451	c->scopestack = PL_scopestack;	564	}
452	c->scopestack_ix = PL_scopestack_ix;
453	c->scopestack_max = PL_scopestack_max;
454	c->savestack = PL_savestack;
455	c->savestack_ix = PL_savestack_ix;
456	c->savestack_max = PL_savestack_max;
457	c->retstack = PL_retstack;
458	c->retstack_ix = PL_retstack_ix;
459	c->retstack_max = PL_retstack_max;
460	c->curcop = PL_curcop;
461	c->top_env = PL_top_env;
462	}	565	}
463		566
464	/*	567	/*
465	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
466	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
467	* on the assumption that coroutines do not usually need	570	* on the (sometimes correct) assumption that coroutines do
468	* a lot of stackspace.	571	* not usually need a lot of stackspace.
469	*/	572	*/
470	STATIC void	573	#if CORO_PREFER_PERL_FUNCTIONS
		574	# define coro_init_stacks init_stacks
		575	#else
		576	static void
471	coro_init_stacks (pTHX)	577	coro_init_stacks (pTHX)
472	{	578	{
473	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	579	PL_curstackinfo = new_stackinfo(32, 8);
474	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
475	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
476	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
477		583
478	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
479	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
480	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
481		587
482	New(50,PL_tmps_stack,96,SV*);	588	New(50,PL_tmps_stack,32,SV*);
483	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
484	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
485	PL_tmps_max = 96;	591	PL_tmps_max = 32;
486		592
487	New(54,PL_markstack,16,I32);	593	New(54,PL_markstack,16,I32);
488	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
489	PL_markstack_max = PL_markstack + 16;	595	PL_markstack_max = PL_markstack + 16;
490		596
		597	#ifdef SET_MARK_OFFSET
491	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
		599	#endif
492		600
493	New(54,PL_scopestack,16,I32);	601	New(54,PL_scopestack,8,I32);
494	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
495	PL_scopestack_max = 16;	603	PL_scopestack_max = 8;
496		604
497	New(54,PL_savestack,96,ANY);	605	New(54,PL_savestack,24,ANY);
498	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
499	PL_savestack_max = 96;	607	PL_savestack_max = 24;
500		608
		609	#if !PERL_VERSION_ATLEAST (5,10,0)
501	New(54,PL_retstack,8,OP*);	610	New(54,PL_retstack,4,OP*);
502	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
503	PL_retstack_max = 8;	612	PL_retstack_max = 4;
		613	#endif
504	}	614	}
		615	#endif
505		616
506	/*	617	/*
507	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
508	* still there is a memleak of 128 bytes...
509	*/	619	*/
510	STATIC void	620	static void
511	destroy_stacks(pTHX)	621	coro_destroy_stacks (pTHX)
512	{	622	{
513	/* is this ugly, I ask? */
514	while (PL_scopestack_ix)
515	LEAVE;
516
517	/* sure it is, but more important: is it correct?? :/ */
518	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
519	FREETMPS;
520
521	while (PL_curstackinfo->si_next)	623	while (PL_curstackinfo->si_next)
522	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
523		625
524	while (PL_curstackinfo)	626	while (PL_curstackinfo)
525	{	627	{
526	PERL_SI *p = PL_curstackinfo->si_prev;	628	PERL_SI *p = PL_curstackinfo->si_prev;
527		629
528	{	630	if (!IN_DESTRUCT)
529	dSP;
530	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
531	PUTBACK; /* possibly superfluous */
532	}
533
534	dounwind(-1);
535
536	SvREFCNT_dec(PL_curstackinfo->si_stack);	631	SvREFCNT_dec (PL_curstackinfo->si_stack);
		632
537	Safefree(PL_curstackinfo->si_cxstack);	633	Safefree (PL_curstackinfo->si_cxstack);
538	Safefree(PL_curstackinfo);	634	Safefree (PL_curstackinfo);
539	PL_curstackinfo = p;	635	PL_curstackinfo = p;
540	}	636	}
541		637
542	Safefree(PL_tmps_stack);	638	Safefree (PL_tmps_stack);
543	Safefree(PL_markstack);	639	Safefree (PL_markstack);
544	Safefree(PL_scopestack);	640	Safefree (PL_scopestack);
545	Safefree(PL_savestack);	641	Safefree (PL_savestack);
		642	#if !PERL_VERSION_ATLEAST (5,10,0)
546	Safefree(PL_retstack);	643	Safefree (PL_retstack);
		644	#endif
		645	}
		646
		647	static size_t
		648	coro_rss (pTHX_ struct coro *coro)
		649	{
		650	size_t rss = sizeof (*coro);
		651
		652	if (coro->mainstack)
		653	{
		654	perl_slots tmp_slot;
		655	perl_slots *slot;
		656
		657	if (coro->flags & CF_RUNNING)
		658	{
		659	slot = &tmp_slot;
		660
		661	#define VAR(name,type) slot->name = PL_ ## name;
		662	# include "state.h"
		663	#undef VAR
		664	}
		665	else
		666	slot = coro->slot;
		667
		668	rss += sizeof (slot->curstackinfo);
		669	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		670	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		671	rss += slot->tmps_max * sizeof (SV *);
		672	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		673	rss += slot->scopestack_max * sizeof (I32);
		674	rss += slot->savestack_max * sizeof (ANY);
		675
		676	#if !PERL_VERSION_ATLEAST (5,10,0)
		677	rss += slot->retstack_max * sizeof (OP *);
		678	#endif
		679	}
		680
		681	return rss;
		682	}
		683
		684	/** coroutine stack handling ************************************************/
		685
		686	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		687	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		688	static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
		689
		690	/* apparently < 5.8.8 */
		691	#undef MgPV_nolen_const
		692	#ifndef MgPV_nolen_const
		693	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		694	SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
		695	(const char*)(mg)->mg_ptr)
		696	#endif
		697
		698	/*
		699	* This overrides the default magic get method of %SIG elements.
		700	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		701	* and instead of tryign to save and restore the hash elements, we just provide
		702	* readback here.
		703	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		704	* not expecting this to actually change the hook. This is a potential problem
		705	* when a schedule happens then, but we ignore this.
		706	*/
		707	static int
		708	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		709	{
		710	const char *s = MgPV_nolen_const (mg);
		711
		712	if (*s == '_')
		713	{
		714	SV **svp = 0;
		715
		716	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		717	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		718
		719	if (svp)
		720	{
		721	sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
		722	return 0;
		723	}
		724	}
		725
		726	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		727	}
		728
		729	static int
		730	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		731	{
		732	const char *s = MgPV_nolen_const (mg);
		733
		734	if (*s == '_')
		735	{
		736	SV **svp = 0;
		737
		738	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		739	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		740
		741	if (svp)
		742	{
		743	SV *old = *svp;
		744	*svp = 0;
		745	SvREFCNT_dec (old);
		746	return 0;
		747	}
		748	}
		749
		750	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		751	}
		752
		753	static int
		754	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		755	{
		756	const char *s = MgPV_nolen_const (mg);
		757
		758	if (*s == '_')
		759	{
		760	SV **svp = 0;
		761
		762	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		763	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		764
		765	if (svp)
		766	{
		767	SV *old = *svp;
		768	*svp = newSVsv (sv);
		769	SvREFCNT_dec (old);
		770	return 0;
		771	}
		772	}
		773
		774	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
547	}	775	}
548		776
549	static void	777	static void
550	allocate_stack (Coro__State ctx, int alloc)	778	coro_setup (pTHX_ struct coro *coro)
551	{
552	coro_stack *stack;
553
554	New (0, stack, 1, coro_stack);
555
556	stack->refcnt = 1;
557	stack->usecnt = 1;
558	stack->gencnt = ctx->gencnt = 0;
559	if (alloc)
560	{
561	#ifdef HAVE_MMAP
562	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
563	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
564	if (stack->sptr == (void *)-1)
565	#endif
566	{
567	/*FIXME*//*D*//* reasonable stack size! */
568	stack->ssize = -4096 * sizeof (long);
569	New (0, stack->sptr, 4096, long);
570	}
571	}
572	else
573	stack->sptr = 0;
574
575	ctx->stack = stack;
576	}
577
578	static void
579	deallocate_stack (Coro__State ctx)
580	{
581	coro_stack *stack = ctx->stack;
582
583	ctx->stack = 0;
584
585	if (stack)
586	{
587	if (!--stack->refcnt)
588	{
589	#ifdef HAVE_MMAP
590	if (stack->ssize > 0 && stack->sptr)
591	munmap (stack->sptr, stack->ssize);
592	else
593	#else
594	Safefree (stack->sptr);
595	#endif
596	Safefree (stack);
597	}
598	else if (ctx->gencnt == stack->gencnt)
599	--stack->usecnt;
600	}
601	}
602
603	static void
604	setup_coro (void *arg)
605	{	779	{
606	/*	780	/*
607	* emulate part of the perl startup here.	781	* emulate part of the perl startup here.
608	*/	782	*/
609	dSP;
610	Coro__State ctx = (Coro__State)arg;
611	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
612
613	coro_init_stacks (aTHX);	783	coro_init_stacks (aTHX);
614	/*PL_curcop = 0;*/	784
615	/*PL_in_eval = PL_in_eval;*/ /* inherit */	785	PL_runops = RUNOPS_DEFAULT;
		786	PL_curcop = &PL_compiling;
		787	PL_in_eval = EVAL_NULL;
		788	PL_comppad = 0;
		789	PL_curpm = 0;
		790	PL_curpad = 0;
		791	PL_localizing = 0;
		792	PL_dirty = 0;
		793	PL_restartop = 0;
		794	#if PERL_VERSION_ATLEAST (5,10,0)
		795	PL_parser = 0;
		796	#endif
		797
		798	/* recreate the die/warn hooks */
		799	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		800	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		801
		802	GvSV (PL_defgv) = newSV (0);
		803	GvAV (PL_defgv) = coro->args; coro->args = 0;
		804	GvSV (PL_errgv) = newSV (0);
		805	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		806	PL_rs = newSVsv (GvSV (irsgv));
		807	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		808
		809	{
		810	dSP;
		811	LOGOP myop;
		812
		813	Zero (&myop, 1, LOGOP);
		814	myop.op_next = Nullop;
		815	myop.op_flags = OPf_WANT_VOID;
		816
		817	PUSHMARK (SP);
		818	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		819	PUTBACK;
		820	PL_op = (OP *)&myop;
		821	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		822	SPAGAIN;
		823	}
		824
		825	/* this newly created coroutine might be run on an existing cctx which most
		826	* likely was suspended in set_stacklevel, called from entersub.
		827	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		828	* so we ENTER here for symmetry
		829	*/
		830	ENTER;
		831	}
		832
		833	static void
		834	coro_destroy (pTHX_ struct coro *coro)
		835	{
		836	if (!IN_DESTRUCT)
		837	{
		838	/* restore all saved variables and stuff */
		839	LEAVE_SCOPE (0);
		840	assert (PL_tmps_floor == -1);
		841
		842	/* free all temporaries */
		843	FREETMPS;
		844	assert (PL_tmps_ix == -1);
		845
		846	/* unwind all extra stacks */
		847	POPSTACK_TO (PL_mainstack);
		848
		849	/* unwind main stack */
		850	dounwind (-1);
		851	}
		852
		853	SvREFCNT_dec (GvSV (PL_defgv));
616	SvREFCNT_dec (GvAV (PL_defgv));	854	SvREFCNT_dec (GvAV (PL_defgv));
617	GvAV (PL_defgv) = ctx->args;	855	SvREFCNT_dec (GvSV (PL_errgv));
		856	SvREFCNT_dec (PL_defoutgv);
		857	SvREFCNT_dec (PL_rs);
		858	SvREFCNT_dec (GvSV (irsgv));
618		859
619	SPAGAIN;	860	SvREFCNT_dec (PL_diehook);
		861	SvREFCNT_dec (PL_warnhook);
		862
		863	SvREFCNT_dec (coro->saved_deffh);
		864	SvREFCNT_dec (coro->throw);
620		865
621	if (ctx->stack)	866	coro_destroy_stacks (aTHX);
622	{
623	ctx->cursp = 0;
624
625	PUSHMARK(SP);
626	PUTBACK;
627	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
628
629	if (SvTRUE (ERRSV))
630	croak (NULL);
631	else
632	croak ("FATAL: CCTXT coroutine returned!");
633	}
634	else
635	{
636	UNOP myop;
637
638	PL_op = (OP *)&myop;
639
640	Zero(&myop, 1, UNOP);
641	myop.op_next = Nullop;
642	myop.op_flags = OPf_WANT_VOID;
643
644	PUSHMARK(SP);
645	XPUSHs (sub_init);
646	/*
647	* the next line is slightly wrong, as PL_op->op_next
648	* is actually being executed so we skip the first op.
649	* that doesn't matter, though, since it is only
650	* pp_nextstate and we never return...
651	* ah yes, and I don't care anyways ;)
652	*/
653	PUTBACK;
654	PL_op = pp_entersub();
655	SPAGAIN;
656
657	ENTER; /* necessary e.g. for dounwind */
658	}
659	}	867	}
660		868
661	static void	869	static void
662	continue_coro (void *arg)	870	free_coro_mortal (pTHX)
663	{	871	{
664	/*	872	if (expect_true (coro_mortal))
665	* this is a _very_ stripped down perl interpreter ;)	873	{
666	*/	874	SvREFCNT_dec (coro_mortal);
667	Coro__State ctx = (Coro__State)arg;	875	coro_mortal = 0;
668
669	/*FIXME*//* must set up top_env here */
670	ctx->cursp = 0;
671	PL_op = PL_op->op_next;
672	CALLRUNOPS(aTHX);
673
674	abort ();
675	}
676
677	STATIC void
678	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
679	{
680	dSP;
681	dSTACKLEVEL;
682
683	if (prev != next)
684	{	876	}
685	if (next->mainstack)	877	}
		878
		879	static int
		880	runops_trace (pTHX)
		881	{
		882	COP *oldcop = 0;
		883	int oldcxix = -2;
		884	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		885	coro_cctx *cctx = coro->cctx;
		886
		887	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		888	{
		889	PERL_ASYNC_CHECK ();
		890
		891	if (cctx->flags & CC_TRACE_ALL)
686	{	892	{
687	SAVE (prev, flags);	893	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
688	LOAD (next);
689
690	/* mark this state as in-use */
691	next->mainstack = 0;
692	next->tmps_ix = -2;
693
694	/* stacklevel changed? if yes, grab the stack for us! */
695	if (flags & TRANSFER_SAVE_CCTXT)
696	{	894	{
697	if (!prev->stack)	895	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
698	allocate_stack (prev, 0);	896	SV **bot, **top;
699	else if (prev->cursp != stacklevel	897	AV *av = newAV (); /* return values */
700	&& prev->stack->usecnt > 1)	898	SV **cb;
		899	dSP;
		900
		901	GV *gv = CvGV (cx->blk_sub.cv);
		902	SV *fullname = sv_2mortal (newSV (0));
		903	if (isGV (gv))
		904	gv_efullname3 (fullname, gv, 0);
		905
		906	bot = PL_stack_base + cx->blk_oldsp + 1;
		907	top = cx->blk_gimme == G_ARRAY ? SP + 1
		908	: cx->blk_gimme == G_SCALAR ? bot + 1
		909	: bot;
		910
		911	av_extend (av, top - bot);
		912	while (bot < top)
		913	av_push (av, SvREFCNT_inc (*bot++));
		914
		915	PL_runops = RUNOPS_DEFAULT;
		916	ENTER;
		917	SAVETMPS;
		918	EXTEND (SP, 3);
		919	PUSHMARK (SP);
		920	PUSHs (&PL_sv_no);
		921	PUSHs (fullname);
		922	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		923	PUTBACK;
		924	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		925	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		926	SPAGAIN;
		927	FREETMPS;
		928	LEAVE;
		929	PL_runops = runops_trace;
		930	}
		931
		932	if (oldcop != PL_curcop)
		933	{
		934	oldcop = PL_curcop;
		935
		936	if (PL_curcop != &PL_compiling)
701	{	937	{
702	prev->gencnt = ++prev->stack->gencnt;	938	SV **cb;
703	prev->stack->usecnt = 1;
704	}
705		939
706	/* has our stack been invalidated? */	940	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
707	if (next->stack && next->stack->gencnt != next->gencnt)
708	{	941	{
709	deallocate_stack (next);	942	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
710	allocate_stack (next, 1);	943
711	coro_create (&(next->stack->cctx),	944	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
712	continue_coro, (void *)next,	945	{
713	next->stack->sptr, labs (next->stack->ssize));	946	runops_proc_t old_runops = PL_runops;
		947	dSP;
		948	GV *gv = CvGV (cx->blk_sub.cv);
		949	SV *fullname = sv_2mortal (newSV (0));
		950
		951	if (isGV (gv))
		952	gv_efullname3 (fullname, gv, 0);
		953
		954	PL_runops = RUNOPS_DEFAULT;
		955	ENTER;
		956	SAVETMPS;
		957	EXTEND (SP, 3);
		958	PUSHMARK (SP);
		959	PUSHs (&PL_sv_yes);
		960	PUSHs (fullname);
		961	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		962	PUTBACK;
		963	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		964	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		965	SPAGAIN;
		966	FREETMPS;
		967	LEAVE;
		968	PL_runops = runops_trace;
		969	}
		970
		971	oldcxix = cxstack_ix;
714	}	972	}
715		973
716	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	974	if (cctx->flags & CC_TRACE_LINE)
717	}
718
719	}
720	else if (next->tmps_ix == -2)
721	croak ("tried to transfer to running coroutine");
722	else
723	{
724	SAVE (prev, -1); /* first get rid of the old state */
725
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{	975	{
733	setup_coro (next);	976	dSP;
734		977
735	prev->stack->refcnt++;	978	PL_runops = RUNOPS_DEFAULT;
736	prev->stack->usecnt++;	979	ENTER;
737	next->stack = prev->stack;	980	SAVETMPS;
738	next->gencnt = prev->gencnt;	981	EXTEND (SP, 3);
		982	PL_runops = RUNOPS_DEFAULT;
		983	PUSHMARK (SP);
		984	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		985	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		986	PUTBACK;
		987	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		988	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		989	SPAGAIN;
		990	FREETMPS;
		991	LEAVE;
		992	PL_runops = runops_trace;
739	}	993	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	}	994	}
748	}	995	}
749	else
750	setup_coro (next);
751	}	996	}
752	}	997	}
753		998
754	next->cursp = stacklevel;	999	TAINT_NOT;
		1000	return 0;
755	}	1001	}
756		1002
757	static struct coro *	1003	/* inject a fake call to Coro::State::_cctx_init into the execution */
758	sv_to_coro (SV *arg, const char *funcname, const char *varname)	1004	/* _cctx_init should be careful, as it could be called at almost any time */
		1005	/* during execution of a perl program */
		1006	static void NOINLINE
		1007	cctx_prepare (pTHX_ coro_cctx *cctx)
759	{	1008	{
760	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	1009	dSP;
		1010	LOGOP myop;
		1011
		1012	PL_top_env = &PL_start_env;
		1013
		1014	if (cctx->flags & CC_TRACE)
		1015	PL_runops = runops_trace;
		1016
		1017	Zero (&myop, 1, LOGOP);
		1018	myop.op_next = PL_op;
		1019	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		1020
		1021	PUSHMARK (SP);
		1022	EXTEND (SP, 2);
		1023	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		1024	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		1025	PUTBACK;
		1026	PL_op = (OP *)&myop;
		1027	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		1028	SPAGAIN;
		1029	}
		1030
		1031	/*
		1032	* this is a _very_ stripped down perl interpreter ;)
		1033	*/
		1034	static void
		1035	cctx_run (void *arg)
		1036	{
		1037	dTHX;
		1038
		1039	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		1040	UNLOCK;
		1041
		1042	/* we now skip the entersub that lead to transfer() */
		1043	PL_op = PL_op->op_next;
		1044
		1045	/* inject a fake subroutine call to cctx_init */
		1046	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1047
		1048	/* somebody or something will hit me for both perl_run and PL_restartop */
		1049	PL_restartop = PL_op;
		1050	perl_run (PL_curinterp);
		1051
		1052	/*
		1053	* If perl-run returns we assume exit() was being called or the coro
		1054	* fell off the end, which seems to be the only valid (non-bug)
		1055	* reason for perl_run to return. We try to exit by jumping to the
		1056	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1057	* coroutine as Coro has no such concept
		1058	*/
		1059	PL_top_env = main_top_env;
		1060	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1061	}
		1062
		1063	static coro_cctx *
		1064	cctx_new ()
		1065	{
		1066	coro_cctx *cctx;
		1067	void *stack_start;
		1068	size_t stack_size;
		1069
		1070	++cctx_count;
		1071
		1072	Newz (0, cctx, 1, coro_cctx);
		1073
		1074	#if HAVE_MMAP
		1075	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1076	/* mmap supposedly does allocate-on-write for us */
		1077	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1078
		1079	if (cctx->sptr != (void *)-1)
761	{	1080	{
762	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	1081	# if CORO_STACKGUARD
763		1082	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
764	if (!he)	1083	# endif
765	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	1084	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
766		1085	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
767	arg = HeVAL(he);	1086	cctx->flags |= CC_MAPPED;
768	}	1087	}
769
770	/* must also be changed inside Coro::Cont::yield */
771	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
772	return (struct coro *) SvIV((SV*)SvRV(arg));
773	else	1088	else
774	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	1089	#endif
775	}	1090	{
		1091	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1092	New (0, cctx->sptr, coro_stacksize, long);
776		1093
		1094	if (!cctx->sptr)
		1095	{
		1096	perror ("FATAL: unable to allocate stack for coroutine");
		1097	_exit (EXIT_FAILURE);
		1098	}
		1099
		1100	stack_start = cctx->sptr;
		1101	stack_size = cctx->ssize;
		1102	}
		1103
		1104	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1105	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1106
		1107	return cctx;
		1108	}
		1109
		1110	static void
		1111	cctx_destroy (coro_cctx *cctx)
		1112	{
		1113	if (!cctx)
		1114	return;
		1115
		1116	--cctx_count;
		1117
		1118	#if CORO_USE_VALGRIND
		1119	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1120	#endif
		1121
		1122	#if HAVE_MMAP
		1123	if (cctx->flags & CC_MAPPED)
		1124	munmap (cctx->sptr, cctx->ssize);
		1125	else
		1126	#endif
		1127	Safefree (cctx->sptr);
		1128
		1129	Safefree (cctx);
		1130	}
		1131
		1132	/* wether this cctx should be destructed */
		1133	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1134
		1135	static coro_cctx *
		1136	cctx_get (pTHX)
		1137	{
		1138	while (expect_true (cctx_first))
		1139	{
		1140	coro_cctx *cctx = cctx_first;
		1141	cctx_first = cctx->next;
		1142	--cctx_idle;
		1143
		1144	if (expect_true (!CCTX_EXPIRED (cctx)))
		1145	return cctx;
		1146
		1147	cctx_destroy (cctx);
		1148	}
		1149
		1150	return cctx_new ();
		1151	}
		1152
		1153	static void
		1154	cctx_put (coro_cctx *cctx)
		1155	{
		1156	/* free another cctx if overlimit */
		1157	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1158	{
		1159	coro_cctx *first = cctx_first;
		1160	cctx_first = first->next;
		1161	--cctx_idle;
		1162
		1163	cctx_destroy (first);
		1164	}
		1165
		1166	++cctx_idle;
		1167	cctx->next = cctx_first;
		1168	cctx_first = cctx;
		1169	}
		1170
		1171	/** coroutine switching *****************************************************/
		1172
		1173	static void
		1174	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1175	{
		1176	if (expect_true (prev != next))
		1177	{
		1178	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1179	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1180
		1181	if (expect_false (next->flags & CF_RUNNING))
		1182	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1183
		1184	if (expect_false (next->flags & CF_DESTROYED))
		1185	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1186
		1187	#if !PERL_VERSION_ATLEAST (5,10,0)
		1188	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1189	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1190	#endif
		1191	}
		1192	}
		1193
		1194	/* always use the TRANSFER macro */
		1195	static void NOINLINE
		1196	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
		1197	{
		1198	dSTACKLEVEL;
		1199	static volatile int has_throw;
		1200
		1201	/* sometimes transfer is only called to set idle_sp */
		1202	if (expect_false (!next))
		1203	{
		1204	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1205	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1206	}
		1207	else if (expect_true (prev != next))
		1208	{
		1209	coro_cctx *prev__cctx;
		1210
		1211	if (expect_false (prev->flags & CF_NEW))
		1212	{
		1213	/* create a new empty context */
		1214	Newz (0, prev->cctx, 1, coro_cctx);
		1215	prev->flags &= ~CF_NEW;
		1216	prev->flags |= CF_RUNNING;
		1217	}
		1218
		1219	prev->flags &= ~CF_RUNNING;
		1220	next->flags |= CF_RUNNING;
		1221
		1222	LOCK;
		1223
		1224	/* first get rid of the old state */
		1225	save_perl (aTHX_ prev);
		1226
		1227	if (expect_false (next->flags & CF_NEW))
		1228	{
		1229	/* need to start coroutine */
		1230	next->flags &= ~CF_NEW;
		1231	/* setup coroutine call */
		1232	coro_setup (aTHX_ next);
		1233	}
		1234	else
		1235	load_perl (aTHX_ next);
		1236
		1237	prev__cctx = prev->cctx;
		1238
		1239	/* possibly "free" the cctx */
		1240	if (expect_true (
		1241	prev__cctx->idle_sp == STACKLEVEL
		1242	&& !(prev__cctx->flags & CC_TRACE)
		1243	&& !force_cctx
		1244	))
		1245	{
		1246	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1247	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1248
		1249	prev->cctx = 0;
		1250
		1251	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1252	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1253	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1254	if (!next->cctx)
		1255	next->cctx = cctx_get (aTHX);
		1256
		1257	cctx_put (prev__cctx);
		1258	}
		1259
		1260	++next->usecount;
		1261
		1262	if (expect_true (!next->cctx))
		1263	next->cctx = cctx_get (aTHX);
		1264
		1265	has_throw = !!next->throw;
		1266
		1267	if (expect_false (prev__cctx != next->cctx))
		1268	{
		1269	prev__cctx->top_env = PL_top_env;
		1270	PL_top_env = next->cctx->top_env;
		1271	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1272	}
		1273
		1274	free_coro_mortal (aTHX);
		1275	UNLOCK;
		1276
		1277	if (expect_false (has_throw))
		1278	{
		1279	struct coro *coro = SvSTATE (coro_current);
		1280
		1281	if (coro->throw)
		1282	{
		1283	SV *exception = coro->throw;
		1284	coro->throw = 0;
		1285	sv_setsv (ERRSV, exception);
		1286	croak (0);
		1287	}
		1288	}
		1289	}
		1290	}
		1291
		1292	struct transfer_args
		1293	{
		1294	struct coro *prev, *next;
		1295	};
		1296
		1297	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1298	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1299
		1300	/** high level stuff ********************************************************/
		1301
		1302	static int
		1303	coro_state_destroy (pTHX_ struct coro *coro)
		1304	{
		1305	if (coro->flags & CF_DESTROYED)
		1306	return 0;
		1307
		1308	coro->flags |= CF_DESTROYED;
		1309
		1310	if (coro->flags & CF_READY)
		1311	{
		1312	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1313	/* alternative: look through all ready queues and remove the coro */
		1314	LOCK;
		1315	--coro_nready;
		1316	UNLOCK;
		1317	}
		1318	else
		1319	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1320
		1321	if (coro->mainstack && coro->mainstack != main_mainstack)
		1322	{
		1323	struct coro temp;
		1324
		1325	if (coro->flags & CF_RUNNING)
		1326	croak ("FATAL: tried to destroy currently running coroutine");
		1327
		1328	save_perl (aTHX_ &temp);
		1329	load_perl (aTHX_ coro);
		1330
		1331	coro_destroy (aTHX_ coro);
		1332
		1333	load_perl (aTHX_ &temp);
		1334
		1335	coro->slot = 0;
		1336	}
		1337
		1338	cctx_destroy (coro->cctx);
		1339	SvREFCNT_dec (coro->args);
		1340
		1341	if (coro->next) coro->next->prev = coro->prev;
		1342	if (coro->prev) coro->prev->next = coro->next;
		1343	if (coro == coro_first) coro_first = coro->next;
		1344
		1345	return 1;
		1346	}
		1347
		1348	static int
		1349	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1350	{
		1351	struct coro *coro = (struct coro *)mg->mg_ptr;
		1352	mg->mg_ptr = 0;
		1353
		1354	coro->hv = 0;
		1355
		1356	if (--coro->refcnt < 0)
		1357	{
		1358	coro_state_destroy (aTHX_ coro);
		1359	Safefree (coro);
		1360	}
		1361
		1362	return 0;
		1363	}
		1364
		1365	static int
		1366	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1367	{
		1368	struct coro *coro = (struct coro *)mg->mg_ptr;
		1369
		1370	++coro->refcnt;
		1371
		1372	return 0;
		1373	}
		1374
		1375	static MGVTBL coro_state_vtbl = {
		1376	0, 0, 0, 0,
		1377	coro_state_free,
		1378	0,
		1379	#ifdef MGf_DUP
		1380	coro_state_dup,
		1381	#else
		1382	# define MGf_DUP 0
		1383	#endif
		1384	};
		1385
		1386	static void
		1387	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1388	{
		1389	ta->prev = SvSTATE (prev_sv);
		1390	ta->next = SvSTATE (next_sv);
		1391	TRANSFER_CHECK (*ta);
		1392	}
		1393
		1394	static void
		1395	api_transfer (SV *prev_sv, SV *next_sv)
		1396	{
		1397	dTHX;
		1398	struct transfer_args ta;
		1399
		1400	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1401	TRANSFER (ta, 1);
		1402	}
		1403
		1404	/** Coro ********************************************************************/
		1405
		1406	static void
		1407	coro_enq (pTHX_ SV *coro_sv)
		1408	{
		1409	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1410	}
		1411
		1412	static SV *
		1413	coro_deq (pTHX)
		1414	{
		1415	int prio;
		1416
		1417	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1418	if (AvFILLp (coro_ready [prio]) >= 0)
		1419	return av_shift (coro_ready [prio]);
		1420
		1421	return 0;
		1422	}
		1423
		1424	static int
		1425	api_ready (SV *coro_sv)
		1426	{
		1427	dTHX;
		1428	struct coro *coro;
		1429	SV *sv_hook;
		1430	void (*xs_hook)(void);
		1431
		1432	if (SvROK (coro_sv))
		1433	coro_sv = SvRV (coro_sv);
		1434
		1435	coro = SvSTATE (coro_sv);
		1436
		1437	if (coro->flags & CF_READY)
		1438	return 0;
		1439
		1440	coro->flags |= CF_READY;
		1441
		1442	LOCK;
		1443
		1444	sv_hook = coro_nready ? 0 : coro_readyhook;
		1445	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1446
		1447	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1448	++coro_nready;
		1449
		1450	UNLOCK;
		1451
		1452	if (sv_hook)
		1453	{
		1454	dSP;
		1455
		1456	ENTER;
		1457	SAVETMPS;
		1458
		1459	PUSHMARK (SP);
		1460	PUTBACK;
		1461	call_sv (sv_hook, G_DISCARD);
		1462	SPAGAIN;
		1463
		1464	FREETMPS;
		1465	LEAVE;
		1466	}
		1467
		1468	if (xs_hook)
		1469	xs_hook ();
		1470
		1471	return 1;
		1472	}
		1473
		1474	static int
		1475	api_is_ready (SV *coro_sv)
		1476	{
		1477	dTHX;
		1478	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1479	}
		1480
		1481	static void
		1482	prepare_schedule (pTHX_ struct transfer_args *ta)
		1483	{
		1484	SV *prev_sv, *next_sv;
		1485
		1486	for (;;)
		1487	{
		1488	LOCK;
		1489	next_sv = coro_deq (aTHX);
		1490
		1491	/* nothing to schedule: call the idle handler */
		1492	if (expect_false (!next_sv))
		1493	{
		1494	dSP;
		1495	UNLOCK;
		1496
		1497	ENTER;
		1498	SAVETMPS;
		1499
		1500	PUSHMARK (SP);
		1501	PUTBACK;
		1502	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1503	SPAGAIN;
		1504
		1505	FREETMPS;
		1506	LEAVE;
		1507	continue;
		1508	}
		1509
		1510	ta->next = SvSTATE (next_sv);
		1511
		1512	/* cannot transfer to destroyed coros, skip and look for next */
		1513	if (expect_false (ta->next->flags & CF_DESTROYED))
		1514	{
		1515	UNLOCK;
		1516	SvREFCNT_dec (next_sv);
		1517	/* coro_nready is already taken care of by destroy */
		1518	continue;
		1519	}
		1520
		1521	--coro_nready;
		1522	UNLOCK;
		1523	break;
		1524	}
		1525
		1526	/* free this only after the transfer */
		1527	prev_sv = SvRV (coro_current);
		1528	ta->prev = SvSTATE (prev_sv);
		1529	TRANSFER_CHECK (*ta);
		1530	assert (ta->next->flags & CF_READY);
		1531	ta->next->flags &= ~CF_READY;
		1532	SvRV_set (coro_current, next_sv);
		1533
		1534	LOCK;
		1535	free_coro_mortal (aTHX);
		1536	coro_mortal = prev_sv;
		1537	UNLOCK;
		1538	}
		1539
		1540	static void
		1541	prepare_cede (pTHX_ struct transfer_args *ta)
		1542	{
		1543	api_ready (coro_current);
		1544	prepare_schedule (aTHX_ ta);
		1545	}
		1546
		1547	static int
		1548	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1549	{
		1550	if (coro_nready)
		1551	{
		1552	SV *prev = SvRV (coro_current);
		1553	prepare_schedule (aTHX_ ta);
		1554	api_ready (prev);
		1555	return 1;
		1556	}
		1557	else
		1558	return 0;
		1559	}
		1560
		1561	static void
		1562	api_schedule (void)
		1563	{
		1564	dTHX;
		1565	struct transfer_args ta;
		1566
		1567	prepare_schedule (aTHX_ &ta);
		1568	TRANSFER (ta, 1);
		1569	}
		1570
		1571	static int
		1572	api_cede (void)
		1573	{
		1574	dTHX;
		1575	struct transfer_args ta;
		1576
		1577	prepare_cede (aTHX_ &ta);
		1578
		1579	if (expect_true (ta.prev != ta.next))
		1580	{
		1581	TRANSFER (ta, 1);
		1582	return 1;
		1583	}
		1584	else
		1585	return 0;
		1586	}
		1587
		1588	static int
		1589	api_cede_notself (void)
		1590	{
		1591	dTHX;
		1592	struct transfer_args ta;
		1593
		1594	if (prepare_cede_notself (aTHX_ &ta))
		1595	{
		1596	TRANSFER (ta, 1);
		1597	return 1;
		1598	}
		1599	else
		1600	return 0;
		1601	}
		1602
		1603	static void
		1604	api_trace (SV *coro_sv, int flags)
		1605	{
		1606	dTHX;
		1607	struct coro *coro = SvSTATE (coro_sv);
		1608
		1609	if (flags & CC_TRACE)
		1610	{
		1611	if (!coro->cctx)
		1612	coro->cctx = cctx_new ();
		1613	else if (!(coro->cctx->flags & CC_TRACE))
		1614	croak ("cannot enable tracing on coroutine with custom stack");
		1615
		1616	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1617	}
		1618	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1619	{
		1620	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1621
		1622	if (coro->flags & CF_RUNNING)
		1623	PL_runops = RUNOPS_DEFAULT;
		1624	else
		1625	coro->slot->runops = RUNOPS_DEFAULT;
		1626	}
		1627	}
		1628
777	MODULE = Coro::State PACKAGE = Coro::State	1629	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
778		1630
779	PROTOTYPES: ENABLE	1631	PROTOTYPES: DISABLE
780		1632
781	BOOT:	1633	BOOT:
782	{ /* {} necessary for stoopid perl-5.6.x */	1634	{
783	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1635	#ifdef USE_ITHREADS
784	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1636	MUTEX_INIT (&coro_mutex);
		1637	#endif
		1638	BOOT_PAGESIZE;
		1639
		1640	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1641	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1642
		1643	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1644	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1645	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1646
		1647	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1648	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1649	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1650
785	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1651	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
786		1652
787	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1653	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
788	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1654	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
789	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1655	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
790	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1656	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
791
792	if (!padlist_cache)
793	padlist_cache = newHV ();
794		1657
795	main_mainstack = PL_mainstack;	1658	main_mainstack = PL_mainstack;
796	}	1659	main_top_env = PL_top_env;
797		1660
798	Coro::State	1661	while (main_top_env->je_prev)
799	_newprocess(args)	1662	main_top_env = main_top_env->je_prev;
800	SV * args	1663
801	PROTOTYPE: $	1664	coroapi.ver = CORO_API_VERSION;
		1665	coroapi.rev = CORO_API_REVISION;
		1666	coroapi.transfer = api_transfer;
		1667
		1668	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1669	}
		1670
		1671	SV *
		1672	new (char *klass, ...)
802	CODE:	1673	CODE:
803	Coro__State coro;	1674	{
		1675	struct coro *coro;
		1676	MAGIC *mg;
		1677	HV *hv;
		1678	int i;
804		1679
805	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
806	croak ("Coro::State::_newprocess expects an arrayref");
807
808	New (0, coro, 1, struct coro);	1680	Newz (0, coro, 1, struct coro);
		1681	coro->args = newAV ();
		1682	coro->flags = CF_NEW;
809		1683
810	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1684	if (coro_first) coro_first->prev = coro;
811	coro->mainstack = 0; /* actual work is done inside transfer */	1685	coro->next = coro_first;
812	coro->stack = 0;	1686	coro_first = coro;
813		1687
814	RETVAL = coro;	1688	coro->hv = hv = newHV ();
		1689	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1690	mg->mg_flags |= MGf_DUP;
		1691	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1692
		1693	av_extend (coro->args, items - 1);
		1694	for (i = 1; i < items; i++)
		1695	av_push (coro->args, newSVsv (ST (i)));
		1696	}
815	OUTPUT:	1697	OUTPUT:
816	RETVAL	1698	RETVAL
817		1699
		1700	# these not obviously related functions are all rolled into the same xs
		1701	# function to increase chances that they all will call transfer with the same
		1702	# stack offset
818	void	1703	void
819	transfer(prev, next, flags)	1704	_set_stacklevel (...)
820	Coro::State_or_hashref prev	1705	ALIAS:
821	Coro::State_or_hashref next	1706	Coro::State::transfer = 1
822	int flags	1707	Coro::schedule = 2
823	PROTOTYPE: @	1708	Coro::cede = 3
		1709	Coro::cede_notself = 4
824	CODE:	1710	CODE:
		1711	{
		1712	struct transfer_args ta;
		1713
825	PUTBACK;	1714	PUTBACK;
826	transfer (aTHX_ prev, next, flags);	1715	switch (ix)
		1716	{
		1717	case 0:
		1718	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1719	ta.next = 0;
		1720	break;
		1721
		1722	case 1:
		1723	if (items != 2)
		1724	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1725
		1726	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1727	break;
		1728
		1729	case 2:
		1730	prepare_schedule (aTHX_ &ta);
		1731	break;
		1732
		1733	case 3:
		1734	prepare_cede (aTHX_ &ta);
		1735	break;
		1736
		1737	case 4:
		1738	if (!prepare_cede_notself (aTHX_ &ta))
		1739	XSRETURN_EMPTY;
		1740
		1741	break;
		1742	}
827	SPAGAIN;	1743	SPAGAIN;
828		1744
		1745	BARRIER;
		1746	PUTBACK;
		1747	TRANSFER (ta, 0);
		1748	SPAGAIN; /* might be the sp of a different coroutine now */
		1749	/* be extra careful not to ever do anything after TRANSFER */
		1750	}
		1751
		1752	bool
		1753	_destroy (SV *coro_sv)
		1754	CODE:
		1755	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1756	OUTPUT:
		1757	RETVAL
		1758
829	void	1759	void
830	DESTROY(coro)	1760	_exit (int code)
831	Coro::State coro	1761	PROTOTYPE: $
832	CODE:	1762	CODE:
		1763	_exit (code);
833		1764
834	if (coro->mainstack && coro->mainstack != main_mainstack)	1765	int
		1766	cctx_stacksize (int new_stacksize = 0)
		1767	CODE:
		1768	RETVAL = coro_stacksize;
		1769	if (new_stacksize)
		1770	coro_stacksize = new_stacksize;
		1771	OUTPUT:
		1772	RETVAL
		1773
		1774	int
		1775	cctx_count ()
		1776	CODE:
		1777	RETVAL = cctx_count;
		1778	OUTPUT:
		1779	RETVAL
		1780
		1781	int
		1782	cctx_idle ()
		1783	CODE:
		1784	RETVAL = cctx_idle;
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	void
		1789	list ()
		1790	PPCODE:
		1791	{
		1792	struct coro *coro;
		1793	for (coro = coro_first; coro; coro = coro->next)
		1794	if (coro->hv)
		1795	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1796	}
		1797
		1798	void
		1799	call (Coro::State coro, SV *coderef)
		1800	ALIAS:
		1801	eval = 1
		1802	CODE:
		1803	{
		1804	if (coro->mainstack)
835	{	1805	{
836	struct coro temp;	1806	struct coro temp;
837		1807
838	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1808	if (!(coro->flags & CF_RUNNING))
839	LOAD(aTHX_ coro);	1809	{
		1810	PUTBACK;
		1811	save_perl (aTHX_ &temp);
		1812	load_perl (aTHX_ coro);
		1813	}
840		1814
841	destroy_stacks (aTHX);	1815	{
		1816	dSP;
		1817	ENTER;
		1818	SAVETMPS;
		1819	PUTBACK;
		1820	PUSHSTACK;
		1821	PUSHMARK (SP);
842		1822
843	LOAD((&temp)); /* this will get rid of defsv etc.. */	1823	if (ix)
		1824	eval_sv (coderef, 0);
		1825	else
		1826	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
844		1827
845	coro->mainstack = 0;	1828	POPSTACK;
		1829	SPAGAIN;
		1830	FREETMPS;
		1831	LEAVE;
		1832	PUTBACK;
		1833	}
		1834
		1835	if (!(coro->flags & CF_RUNNING))
		1836	{
		1837	save_perl (aTHX_ coro);
		1838	load_perl (aTHX_ &temp);
		1839	SPAGAIN;
		1840	}
846	}	1841	}
		1842	}
847		1843
848	deallocate_stack (coro);	1844	SV *
849		1845	is_ready (Coro::State coro)
850	Safefree (coro);	1846	PROTOTYPE: $
		1847	ALIAS:
		1848	is_ready = CF_READY
		1849	is_running = CF_RUNNING
		1850	is_new = CF_NEW
		1851	is_destroyed = CF_DESTROYED
		1852	CODE:
		1853	RETVAL = boolSV (coro->flags & ix);
		1854	OUTPUT:
		1855	RETVAL
851		1856
852	void	1857	void
853	flush()	1858	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
854	CODE:
855	#ifdef MAY_FLUSH
856	flush_padlist_cache ();
857	#endif
858		1859
859	void	1860	SV *
860	_exit(code)	1861	has_cctx (Coro::State coro)
861	int code
862	PROTOTYPE: $	1862	PROTOTYPE: $
863	CODE:	1863	CODE:
864	#if defined(__GLIBC__) || _POSIX_C_SOURCE	1864	RETVAL = boolSV (!!coro->cctx);
865	_exit (code);	1865	OUTPUT:
866	#else	1866	RETVAL
867	signal (SIGTERM, SIG_DFL);
868	raise (SIGTERM);
869	exit (code);
870	#endif
871		1867
872	MODULE = Coro::State PACKAGE = Coro::Cont	1868	int
		1869	is_traced (Coro::State coro)
		1870	PROTOTYPE: $
		1871	CODE:
		1872	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1873	OUTPUT:
		1874	RETVAL
873		1875
874	# this is slightly dirty (should expose a c-level api)	1876	IV
		1877	rss (Coro::State coro)
		1878	PROTOTYPE: $
		1879	ALIAS:
		1880	usecount = 1
		1881	CODE:
		1882	switch (ix)
		1883	{
		1884	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1885	case 1: RETVAL = coro->usecount; break;
		1886	}
		1887	OUTPUT:
		1888	RETVAL
875		1889
876	void	1890	void
877	yield(...)	1891	force_cctx ()
		1892	CODE:
		1893	struct coro *coro = SvSTATE (coro_current);
		1894	coro->cctx->idle_sp = 0;
		1895
		1896	MODULE = Coro::State PACKAGE = Coro
		1897
		1898	BOOT:
		1899	{
		1900	int i;
		1901
		1902	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1903	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1904	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1905
		1906	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1907	SvREADONLY_on (coro_current);
		1908
		1909	coro_stash = gv_stashpv ("Coro", TRUE);
		1910
		1911	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1912	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1913	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1914	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1915	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1916	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1917
		1918	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1919	coro_ready[i] = newAV ();
		1920
		1921	{
		1922	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1923	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
		1924
		1925	coroapi.schedule = api_schedule;
		1926	coroapi.cede = api_cede;
		1927	coroapi.cede_notself = api_cede_notself;
		1928	coroapi.ready = api_ready;
		1929	coroapi.is_ready = api_is_ready;
		1930	coroapi.nready = &coro_nready;
		1931	coroapi.current = coro_current;
		1932
		1933	GCoroAPI = &coroapi;
		1934	sv_setiv (sv, (IV)&coroapi);
		1935	SvREADONLY_on (sv);
		1936	}
		1937	}
		1938
		1939	void
		1940	_set_current (SV *current)
		1941	PROTOTYPE: $
		1942	CODE:
		1943	SvREFCNT_dec (SvRV (coro_current));
		1944	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1945
		1946	void
		1947	_set_readyhook (SV *hook)
		1948	PROTOTYPE: $
		1949	CODE:
		1950	LOCK;
		1951	SvREFCNT_dec (coro_readyhook);
		1952	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1953	UNLOCK;
		1954
		1955	int
		1956	prio (Coro::State coro, int newprio = 0)
		1957	ALIAS:
		1958	nice = 1
		1959	CODE:
		1960	{
		1961	RETVAL = coro->prio;
		1962
		1963	if (items > 1)
		1964	{
		1965	if (ix)
		1966	newprio = coro->prio - newprio;
		1967
		1968	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1969	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1970
		1971	coro->prio = newprio;
		1972	}
		1973	}
		1974	OUTPUT:
		1975	RETVAL
		1976
		1977	SV *
		1978	ready (SV *self)
		1979	PROTOTYPE: $
		1980	CODE:
		1981	RETVAL = boolSV (api_ready (self));
		1982	OUTPUT:
		1983	RETVAL
		1984
		1985	int
		1986	nready (...)
		1987	PROTOTYPE:
		1988	CODE:
		1989	RETVAL = coro_nready;
		1990	OUTPUT:
		1991	RETVAL
		1992
		1993	void
		1994	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1995	PROTOTYPE: $;$
		1996	CODE:
		1997	SvREFCNT_dec (self->throw);
		1998	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1999
		2000	void
		2001	swap_defsv (Coro::State self)
		2002	PROTOTYPE: $
		2003	ALIAS:
		2004	swap_defav = 1
		2005	CODE:
		2006	if (!self->slot)
		2007	croak ("cannot swap state with coroutine that has no saved state");
		2008	else
		2009	{
		2010	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		2011	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		2012
		2013	SV *tmp = *src; *src = *dst; *dst = tmp;
		2014	}
		2015
		2016	# for async_pool speedup
		2017	void
		2018	_pool_1 (SV *cb)
		2019	CODE:
		2020	{
		2021	struct coro *coro = SvSTATE (coro_current);
		2022	HV *hv = (HV *)SvRV (coro_current);
		2023	AV *defav = GvAV (PL_defgv);
		2024	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2025	AV *invoke_av;
		2026	int i, len;
		2027
		2028	if (!invoke)
		2029	{
		2030	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		2031	croak ("\3async_pool terminate\2\n");
		2032	}
		2033
		2034	SvREFCNT_dec (coro->saved_deffh);
		2035	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2036
		2037	hv_store (hv, "desc", sizeof ("desc") - 1,
		2038	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2039
		2040	invoke_av = (AV *)SvRV (invoke);
		2041	len = av_len (invoke_av);
		2042
		2043	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2044
		2045	if (len > 0)
		2046	{
		2047	av_fill (defav, len - 1);
		2048	for (i = 0; i < len; ++i)
		2049	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2050	}
		2051
		2052	SvREFCNT_dec (invoke);
		2053	}
		2054
		2055	void
		2056	_pool_2 (SV *cb)
		2057	CODE:
		2058	{
		2059	struct coro *coro = SvSTATE (coro_current);
		2060
		2061	sv_setsv (cb, &PL_sv_undef);
		2062
		2063	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		2064	coro->saved_deffh = 0;
		2065
		2066	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2067	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2068	{
		2069	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		2070	croak ("\3async_pool terminate\2\n");
		2071	}
		2072
		2073	av_clear (GvAV (PL_defgv));
		2074	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2075	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2076
		2077	coro->prio = 0;
		2078
		2079	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2080	api_trace (coro_current, 0);
		2081
		2082	av_push (av_async_pool, newSVsv (coro_current));
		2083	}
		2084
		2085
		2086	MODULE = Coro::State PACKAGE = Coro::AIO
		2087
		2088	SV *
		2089	_get_state ()
		2090	CODE:
		2091	{
		2092	struct io_state *data;
		2093
		2094	RETVAL = newSV (sizeof (struct io_state));
		2095	data = (struct io_state *)SvPVX (RETVAL);
		2096	SvCUR_set (RETVAL, sizeof (struct io_state));
		2097	SvPOK_only (RETVAL);
		2098
		2099	data->errorno = errno;
		2100	data->laststype = PL_laststype;
		2101	data->laststatval = PL_laststatval;
		2102	data->statcache = PL_statcache;
		2103	}
		2104	OUTPUT:
		2105	RETVAL
		2106
		2107	void
		2108	_set_state (char *data_)
		2109	PROTOTYPE: $
		2110	CODE:
		2111	{
		2112	struct io_state *data = (void *)data_;
		2113
		2114	errno = data->errorno;
		2115	PL_laststype = data->laststype;
		2116	PL_laststatval = data->laststatval;
		2117	PL_statcache = data->statcache;
		2118	}
		2119
		2120
		2121	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2122
		2123	BOOT:
		2124	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2125
		2126	SV *
		2127	_schedule (...)
878	PROTOTYPE: @	2128	PROTOTYPE: @
879	CODE:
880	static SV *returnstk;
881	SV *sv;
882	AV *defav = GvAV (PL_defgv);
883	struct coro *prev, *next;
884
885	if (!returnstk)
886	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
887
888	/* set up @_ -- ugly */
889	av_clear (defav);
890	av_fill (defav, items - 1);
891	while (items--)
892	av_store (defav, items, SvREFCNT_inc (ST(items)));
893
894	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
895	sv = av_pop ((AV *)SvRV (returnstk));
896	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
897	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
898	SvREFCNT_dec (sv);
899
900	transfer(aTHX_ prev, next, 0);
901
902	MODULE = Coro::State PACKAGE = Coro
903
904	# this is slightly dirty (should expose a c-level api)
905
906	BOOT:
907	{
908	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
909	coro_ready = newAV ();
910	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
911	}
912
913	void
914	ready(self)
915	SV * self
916	CODE:	2129	CODE:
917	av_push (coro_ready, SvREFCNT_inc (self));	2130	{
		2131	static int incede;
918		2132
919	void	2133	api_cede_notself ();
920	schedule(...)
921	ALIAS:
922	cede = 1
923	CODE:
924	SV *prev = GvSV (coro_current);
925	SV *next = av_shift (coro_ready);
926		2134
927	if (next == &PL_sv_undef)	2135	++incede;
928	next = SvREFCNT_inc (GvSV (coro_idle));	2136	while (coro_nready >= incede && api_cede ())
929
930	if (ix)
931	av_push (coro_ready, SvREFCNT_inc (prev));
932
933	GvSV (coro_current) = SvREFCNT_inc (next);
934	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
935	sv_to_coro (next, "Coro::schedule", "next coroutine"),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	SvREFCNT_dec (next);
938	SvREFCNT_dec (prev);
939		2137	;
		2138
		2139	sv_setsv (sv_activity, &PL_sv_undef);
		2140	if (coro_nready >= incede)
		2141	{
		2142	PUSHMARK (SP);
		2143	PUTBACK;
		2144	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
		2145	SPAGAIN;
		2146	}
		2147
		2148	--incede;
		2149	}
		2150

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