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Comparing Coro/Coro/State.xs (file contents):
Revision 1.60 by root, Mon Aug 9 02:41:27 2004 UTC vs.
Revision 1.227 by root, Sat Apr 5 22:29:54 2008 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#if PATCHLEVEL < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
		16
		17	#ifdef HAVE_MMAP
		18	# include <unistd.h>
		19	# include <sys/mman.h>
		20	# ifndef MAP_ANONYMOUS
		21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
		23	# else
		24	# undef HAVE_MMAP
		25	# endif
		26	# endif
		27	# include <limits.h>
		28	# ifndef PAGESIZE
		29	# define PAGESIZE pagesize
		30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		31	static long pagesize;
		32	# else
		33	# define BOOT_PAGESIZE (void)0
		34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
		39
		40	#if CORO_USE_VALGRIND
		41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	|| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
10	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
12	# endif	59	# endif
13	# ifndef call_sv	60	# ifndef call_sv
14	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
27	# endif	74	# endif
28	#endif	75	#endif
29		76
30	#include "libcoro/coro.c"	77	/* 5.8.8 */
31		78	#ifndef GV_NOTQUAL
32	#include <signal.h>	79	# define GV_NOTQUAL 0
33
34	#ifdef HAVE_MMAP
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
44	#endif	83	#endif
45		84
46	#define SUB_INIT "Coro::State::initialize"	85	/* 5.11 */
47	#define UCORO_STATE "_coro_state"	86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
48		89
49	/* The next macro should declare a variable stacklevel that contains and approximation	90	/* 5.8.7 */
50	* to the current C stack pointer. Its property is that it changes with each call	91	#ifndef SvRV_set
51	* and should be unique. */	92	# define SvRV_set(s,v) SvRV(s) = (v)
		93	#endif
		94
		95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		96	# undef CORO_STACKGUARD
		97	#endif
		98
		99	#ifndef CORO_STACKGUARD
		100	# define CORO_STACKGUARD 0
		101	#endif
		102
		103	/* prefer perl internal functions over our own? */
		104	#ifndef CORO_PREFER_PERL_FUNCTIONS
		105	# define CORO_PREFER_PERL_FUNCTIONS 0
		106	#endif
		107
		108	/* The next macros try to return the current stack pointer, in an as
		109	* portable way as possible. */
		110	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	111	#define STACKLEVEL ((void *)&stacklevel)
53		112
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		114
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	115	#if __GNUC__ >= 3
		116	# define attribute(x) __attribute__(x)
		117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
		119	#else
		120	# define attribute(x)
		121	# define BARRIER
		122	# define expect(expr,value) (expr)
		123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
		127
		128	#define NOINLINE attribute ((noinline))
57		129
58	#include "CoroAPI.h"	130	#include "CoroAPI.h"
59		131
60	#ifdef USE_ITHREADS	132	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	133	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	134	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	135	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	136	#else
65	# define LOCK 0	137	# define LOCK (void)0
66	# define UNLOCK 0	138	# define UNLOCK (void)0
67	#endif	139	#endif
68		140
		141	/* helper storage struct for Coro::AIO */
		142	struct io_state
		143	{
		144	int errorno;
		145	I32 laststype;
		146	int laststatval;
		147	Stat_t statcache;
		148	};
		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	152	static AV *main_mainstack; /* used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	154	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	155	static volatile SV *coro_mortal; /* will be freed after next transfer */
75		156
76	/* this is actually not only the c stack but also c registers etc... */	157	static GV *irsgv; /* $/ */
		158	static GV *stdoutgv; /* *STDOUT */
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV *hv_sig; /* %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
		167
		168	static struct coro_cctx *cctx_first;
		169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		178	};
		179
		180	/* this is a structure representing a c-level coroutine */
		181	typedef struct coro_cctx {
		182	struct coro_cctx *next;
		183
		184	/* the stack */
		185	void *sptr;
		186	size_t ssize;
		187
		188	/* cpu state */
		189	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		190	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		191	JMPENV *top_env;
		192	coro_context cctx;
		193
		194	#if CORO_USE_VALGRIND
		195	int valgrind_id;
		196	#endif
		197	unsigned char flags;
		198	} coro_cctx;
		199
		200	enum {
		201	CF_RUNNING = 0x0001, /* coroutine is running */
		202	CF_READY = 0x0002, /* coroutine is ready */
		203	CF_NEW = 0x0004, /* has never been switched to */
		204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		205	};
		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
77	typedef struct {	208	typedef struct {
78	int refcnt; /* pointer reference counter */	209	SV *defsv;
79	int usecnt; /* shared by how many coroutines */	210	AV *defav;
80	int gencnt; /* generation counter */	211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
81		217
82	coro_context cctx;	218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83		219
84	void *sptr;	220	/* this is a structure representing a perl-level coroutine */
85	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87
88	struct coro {	221	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	222	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	223	coro_cctx *cctx;
91		224
92	/* the optional C context */	225	/* process data */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;	226	AV *mainstack;
110	SV **stack_sp;	227	perl_slots *slot; /* basically the saved sp */
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	SV **stack_base;
115	SV **stack_max;
116	SV **tmps_stack;
117	I32 tmps_floor;
118	I32 tmps_ix;
119	I32 tmps_max;
120	I32 *markstack;
121	I32 *markstack_ptr;
122	I32 *markstack_max;
123	I32 *scopestack;
124	I32 scopestack_ix;
125	I32 scopestack_max;
126	ANY *savestack;
127	I32 savestack_ix;
128	I32 savestack_max;
129	OP **retstack;
130	I32 retstack_ix;
131	I32 retstack_max;
132	COP *curcop;
133	JMPENV *top_env;
134		228
135	/* data associated with this coroutine (initial args) */	229	AV *args; /* data associated with this coroutine (initial args) */
136	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
		231	int flags; /* CF_ flags */
		232	HV *hv; /* the perl hash associated with this coro, if any */
		233
		234	/* statistics */
		235	int usecount; /* number of transfers to this coro */
		236
		237	/* coro process data */
		238	int prio;
		239	SV *throw; /* exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
		243
		244	/* linked list */
		245	struct coro *next, *prev;
137	};	246	};
138		247
139	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
141		250
142	/* mostly copied from op.c:cv_clone2 */	251	/** Coro ********************************************************************/
143	STATIC AV *	252
144	clone_padlist (pTHX_ AV *protopadlist)	253	#define PRIO_MAX 3
		254	#define PRIO_HIGH 1
		255	#define PRIO_NORMAL 0
		256	#define PRIO_LOW -1
		257	#define PRIO_IDLE -3
		258	#define PRIO_MIN -4
		259
		260	/* for Coro.pm */
		261	static SV *coro_current;
		262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		263	static int coro_nready;
		264	static struct coro *coro_first;
		265
		266	/** lowlevel stuff **********************************************************/
		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
145	{	270	{
146	AV *av;	271	#if PERL_VERSION_ATLEAST (5,9,0)
147	I32 ix;	272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	273	get_sv (name, create);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	274	#endif
150	SV **pname = AvARRAY (protopad_name);	275	return get_sv (name, create);
151	SV **ppad = AvARRAY (protopad);	276	}
152	I32 fname = AvFILLp (protopad_name);	277
153	I32 fpad = AvFILLp (protopad);	278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,9,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,9,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
		298	static AV *
		299	coro_clone_padlist (pTHX_ CV *cv)
		300	{
		301	AV *padlist = CvPADLIST (cv);
154	AV *newpadlist, *newpad_name, *newpad;	302	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		303
165	newpadlist = newAV ();	304	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	305	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	306	#if PERL_VERSION_ATLEAST (5,9,0)
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		308	#else
		309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		310	#endif
		311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		312	--AvFILLp (padlist);
		313
		314	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	315	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		316
239	return newpadlist;	317	return newpadlist;
240	}	318	}
241		319
242	STATIC void	320	static void
243	free_padlist (pTHX_ AV *padlist)	321	free_padlist (pTHX_ AV *padlist)
244	{	322	{
245	/* may be during global destruction */	323	/* may be during global destruction */
246	if (SvREFCNT (padlist))	324	if (SvREFCNT (padlist))
247	{	325	{
…		…
261		339
262	SvREFCNT_dec ((SV*)padlist);	340	SvREFCNT_dec ((SV*)padlist);
263	}	341	}
264	}	342	}
265		343
266	STATIC int	344	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	345	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	346	{
269	AV *padlist;	347	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	348	AV *av = (AV *)mg->mg_obj;
271		349
272	/* casting is fun. */	350	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	352	free_padlist (aTHX_ padlist);
275	}
276		353
		354	return 0;
		355	}
		356
277	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
278		359
279	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
		364
		365	#define CORO_MAGIC(sv,type) \
		366	SvMAGIC (sv) \
		367	? SvMAGIC (sv)->mg_type == type \
		368	? SvMAGIC (sv) \
		369	: mg_find (sv, type) \
		370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
280		400
281	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
282	STATIC void	402	static void
283	get_padlist (pTHX_ CV *cv)	403	get_padlist (pTHX_ CV *cv)
284	{	404	{
285	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
		406	AV *av;
286		407
287	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
288	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289	else	410	else
		411	{
		412	#if CORO_PREFER_PERL_FUNCTIONS
		413	/* this is probably cleaner, but also slower? */
		414	CV *cp = Perl_cv_clone (cv);
		415	CvPADLIST (cv) = CvPADLIST (cp);
		416	CvPADLIST (cp) = 0;
		417	SvREFCNT_dec (cp);
		418	#else
290	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		420	#endif
		421	}
291	}	422	}
292		423
293	STATIC void	424	static void
294	put_padlist (pTHX_ CV *cv)	425	put_padlist (pTHX_ CV *cv)
295	{	426	{
296	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
		428	AV *av;
297		429
298	if (!mg)	430	if (expect_false (!mg))
299	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
300	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
301	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302	mg->mg_virtual = &vtbl_coro;
303	mg->mg_obj = (SV *)newAV ();
304	}
305		432
306	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	433	av = (AV *)mg->mg_obj;
307	}
308		434
309	#define SB do {	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
310	#define SE } while (0)	436	av_extend (av, AvMAX (av) + 1);
311		437
312	#define LOAD(state) load_state(aTHX_ (state));	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
313	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	439	}
314		440
315	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	441	/** load & save, init *******************************************************/
316		442
317	static void	443	static void
318	load_state(pTHX_ Coro__State c)	444	load_perl (pTHX_ Coro__State c)
319	{	445	{
320	PL_dowarn = c->dowarn;	446	perl_slots *slot = c->slot;
321	PL_in_eval = c->in_eval;	447	c->slot = 0;
322		448
323	PL_curstackinfo = c->curstackinfo;
324	PL_curstack = c->curstack;
325	PL_mainstack = c->mainstack;	449	PL_mainstack = c->mainstack;
326	PL_stack_sp = c->stack_sp;
327	PL_op = c->op;
328	PL_curpad = c->curpad;
329	PL_comppad = c->comppad;
330	PL_stack_base = c->stack_base;
331	PL_stack_max = c->stack_max;
332	PL_tmps_stack = c->tmps_stack;
333	PL_tmps_floor = c->tmps_floor;
334	PL_tmps_ix = c->tmps_ix;
335	PL_tmps_max = c->tmps_max;
336	PL_markstack = c->markstack;
337	PL_markstack_ptr = c->markstack_ptr;
338	PL_markstack_max = c->markstack_max;
339	PL_scopestack = c->scopestack;
340	PL_scopestack_ix = c->scopestack_ix;
341	PL_scopestack_max = c->scopestack_max;
342	PL_savestack = c->savestack;
343	PL_savestack_ix = c->savestack_ix;
344	PL_savestack_max = c->savestack_max;
345	PL_retstack = c->retstack;
346	PL_retstack_ix = c->retstack_ix;
347	PL_retstack_max = c->retstack_max;
348	PL_curcop = c->curcop;
349	PL_top_env = c->top_env;
350		450
351	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	451	GvSV (PL_defgv) = slot->defsv;
352	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	452	GvAV (PL_defgv) = slot->defav;
353	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
		456	#define VAR(name,type) PL_ ## name = slot->name;
		457	# include "state.h"
		458	#undef VAR
354		459
355	{	460	{
356	dSP;	461	dSP;
		462
357	CV *cv;	463	CV *cv;
358		464
359	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
360	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
361	{	467	{
362	AV *padlist = (AV *)POPs;
363
364	if (padlist)
365	{
366	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
367	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
368	}	470	CvPADLIST (cv) = (AV *)POPs;
369
370	++CvDEPTH(cv);
371	}	471	}
372		472
373	PUTBACK;	473	PUTBACK;
374	}	474	}
375	}	475	}
376		476
377	static void	477	static void
378	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
379	{	479	{
380	{	480	{
381	dSP;	481	dSP;
382	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
383	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
386	/*	486	/*
387	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
388	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
389	*/	489	*/
390		490
391	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
392	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
393	for (;;)	493	for (;;)
394	{	494	{
395	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
396	{	496	{
397	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
398		498
399	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
400	{	500	{
401	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
402	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
403	{	504	{
404	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
405
406	while (--CvDEPTH(cv))
407	{
408	/* this tells the restore code to increment CvDEPTH */
409	PUSHs (Nullsv);
410	PUSHs ((SV *)cv);
411	}
412
413	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
414	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
415		509
		510	CvDEPTH (cv) = 0;
416	get_padlist (aTHX_ cv); /* this is a monster */	511	get_padlist (aTHX_ cv);
417	}	512	}
418	}	513	}
419	#ifdef CXt_FORMAT
420	else if (CxTYPE(cx) == CXt_FORMAT)
421	{
422	/* I never used formats, so how should I know how these are implemented? */
423	/* my bold guess is as a simple, plain sub... */
424	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
425	}
426	#endif
427	}	514	}
428		515
429	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
430	break;	517	break;
431		518
432	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
433	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
434	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
435	}	522	}
436		523
437	PUTBACK;	524	PUTBACK;
438	}	525	}
439		526
440	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
441	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
442	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
443		538
444	c->dowarn = PL_dowarn;
445	c->in_eval = PL_in_eval;
446
447	c->curstackinfo = PL_curstackinfo;
448	c->curstack = PL_curstack;
449	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
450	c->stack_sp = PL_stack_sp;	540
451	c->op = PL_op;	541	{
452	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
453	c->comppad = PL_comppad;	543
454	c->stack_base = PL_stack_base;	544	slot->defav = GvAV (PL_defgv);
455	c->stack_max = PL_stack_max;	545	slot->defsv = DEFSV;
456	c->tmps_stack = PL_tmps_stack;	546	slot->errsv = ERRSV;
457	c->tmps_floor = PL_tmps_floor;	547	slot->irsgv = GvSV (irsgv);
458	c->tmps_ix = PL_tmps_ix;	548
459	c->tmps_max = PL_tmps_max;	549	#define VAR(name,type) slot->name = PL_ ## name;
460	c->markstack = PL_markstack;	550	# include "state.h"
461	c->markstack_ptr = PL_markstack_ptr;	551	#undef VAR
462	c->markstack_max = PL_markstack_max;	552	}
463	c->scopestack = PL_scopestack;
464	c->scopestack_ix = PL_scopestack_ix;
465	c->scopestack_max = PL_scopestack_max;
466	c->savestack = PL_savestack;
467	c->savestack_ix = PL_savestack_ix;
468	c->savestack_max = PL_savestack_max;
469	c->retstack = PL_retstack;
470	c->retstack_ix = PL_retstack_ix;
471	c->retstack_max = PL_retstack_max;
472	c->curcop = PL_curcop;
473	c->top_env = PL_top_env;
474	}	553	}
475		554
476	/*	555	/*
477	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
478	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
479	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
480	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
481	*/	560	*/
482	STATIC void	561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
		564	static void
483	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
484	{	566	{
485	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
486
487	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
488	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
489	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
490	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491		571
492	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
493	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
494	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
495		575
496	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
497	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
498	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
499	PL_tmps_max = 96;	579	PL_tmps_max = 32;
500		580
501	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
502	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
503	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
504		584
505	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
506	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
507	#endif	587	#endif
508		588
509	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
510	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
511	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
512		592
513	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
514	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
515	PL_savestack_max = 96;	595	PL_savestack_max = 24;
516		596
		597	#if !PERL_VERSION_ATLEAST (5,9,0)
517	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
518	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
519	PL_retstack_max = 8;	600	PL_retstack_max = 4;
520		601	#endif
521	UNLOCK;
522	}	602	}
		603	#endif
523		604
524	/*	605	/*
525	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
526	*/	607	*/
527	STATIC void	608	static void
528	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
529	{	610	{
530	if (!IN_DESTRUCT)
531	{
532	/* is this ugly, I ask? */
533	LEAVE_SCOPE (0);
534
535	/* sure it is, but more important: is it correct?? :/ */
536	FREETMPS;
537
538	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
539	}
540
541	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
542	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
543		613
544	while (PL_curstackinfo)	614	while (PL_curstackinfo)
545	{	615	{
546	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
547		617
548	{ /*D*//*remove*/
549	dSP;
550	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
551	PUTBACK; /* possibly superfluous */
552	}
553
554	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
555	{
556	dounwind (-1);/*D*//*remove*/
557	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
558	}
559		620
560	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
561	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
562	PL_curstackinfo = p;	623	PL_curstackinfo = p;
563	}	624	}
564		625
565	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
566	Safefree (PL_markstack);	627	Safefree (PL_markstack);
567	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
568	Safefree (PL_savestack);	629	Safefree (PL_savestack);
		630	#if !PERL_VERSION_ATLEAST (5,9,0)
569	Safefree (PL_retstack);	631	Safefree (PL_retstack);
		632	#endif
		633	}
		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
		674	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		675	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV *old = *svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
570	}	722	}
571		723
572	static void	724	static void
573	allocate_stack (Coro__State ctx, int alloc)	725	coro_setup (pTHX_ struct coro *coro)
574	{
575	coro_stack *stack;
576
577	New (0, stack, 1, coro_stack);
578
579	stack->refcnt = 1;
580	stack->usecnt = 1;
581	stack->gencnt = ctx->gencnt = 0;
582
583	if (alloc)
584	{
585	#if HAVE_MMAP
586	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
587	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588	if (stack->sptr == (void *)-1)
589	#endif
590	{
591	/*FIXME*//*D*//* reasonable stack size! */
592	stack->ssize = - (8192 * sizeof (long));
593	New (0, stack->sptr, 8192, long);
594	}
595	}
596	else
597	stack->sptr = 0;
598
599	ctx->stack = stack;
600	}
601
602	static void
603	deallocate_stack (Coro__State ctx)
604	{
605	coro_stack *stack = ctx->stack;
606
607	ctx->stack = 0;
608
609	if (stack)
610	{
611	if (!--stack->refcnt)
612	{
613	#ifdef HAVE_MMAP
614	if (stack->ssize > 0 && stack->sptr)
615	munmap (stack->sptr, stack->ssize);
616	else
617	#endif
618	Safefree (stack->sptr);
619
620	Safefree (stack);
621	}
622	else if (ctx->gencnt == stack->gencnt)
623	--stack->usecnt;
624	}
625	}
626
627	static void
628	setup_coro (void *arg)
629	{	726	{
630	/*	727	/*
631	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
632	*/	729	*/
633	dTHX;
634	dSP;
635	Coro__State ctx = (Coro__State)arg;
636	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
637
638	coro_init_stacks (aTHX);	730	coro_init_stacks (aTHX);
639	/*PL_curcop = 0;*/	731
640	/*PL_in_eval = PL_in_eval;*/ /* inherit */	732	PL_runops = RUNOPS_DEFAULT;
		733	PL_curcop = &PL_compiling;
		734	PL_in_eval = EVAL_NULL;
		735	PL_comppad = 0;
		736	PL_curpm = 0;
		737	PL_curpad = 0;
		738	PL_localizing = 0;
		739	PL_dirty = 0;
		740	PL_restartop = 0;
		741
		742	/* recreate the die/warn hooks */
		743	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		744	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		745
		746	GvSV (PL_defgv) = newSV (0);
		747	GvAV (PL_defgv) = coro->args; coro->args = 0;
		748	GvSV (PL_errgv) = newSV (0);
		749	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		750	PL_rs = newSVsv (GvSV (irsgv));
		751	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		752
		753	{
		754	dSP;
		755	LOGOP myop;
		756
		757	Zero (&myop, 1, LOGOP);
		758	myop.op_next = Nullop;
		759	myop.op_flags = OPf_WANT_VOID;
		760
		761	PUSHMARK (SP);
		762	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		763	PUTBACK;
		764	PL_op = (OP *)&myop;
		765	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		766	SPAGAIN;
		767	}
		768
		769	/* this newly created coroutine might be run on an existing cctx which most
		770	* likely was suspended in set_stacklevel, called from entersub.
		771	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		772	* so we ENTER here for symmetry
		773	*/
		774	ENTER;
		775	}
		776
		777	static void
		778	coro_destroy (pTHX_ struct coro *coro)
		779	{
		780	if (!IN_DESTRUCT)
		781	{
		782	/* restore all saved variables and stuff */
		783	LEAVE_SCOPE (0);
		784	assert (PL_tmps_floor == -1);
		785
		786	/* free all temporaries */
		787	FREETMPS;
		788	assert (PL_tmps_ix == -1);
		789
		790	/* unwind all extra stacks */
		791	POPSTACK_TO (PL_mainstack);
		792
		793	/* unwind main stack */
		794	dounwind (-1);
		795	}
		796
		797	SvREFCNT_dec (GvSV (PL_defgv));
641	SvREFCNT_dec (GvAV (PL_defgv));	798	SvREFCNT_dec (GvAV (PL_defgv));
642	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	799	SvREFCNT_dec (GvSV (PL_errgv));
		800	SvREFCNT_dec (PL_defoutgv);
		801	SvREFCNT_dec (PL_rs);
		802	SvREFCNT_dec (GvSV (irsgv));
643		803
644	SPAGAIN;	804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
645		809
646	if (ctx->stack)	810	coro_destroy_stacks (aTHX);
647	{
648	ctx->cursp = 0;
649
650	PUSHMARK(SP);
651	PUTBACK;
652	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
653
654	if (SvTRUE (ERRSV))
655	croak (NULL);
656	else
657	croak ("FATAL: CCTXT coroutine returned!");
658	}
659	else
660	{
661	UNOP myop;
662
663	PL_op = (OP *)&myop;
664
665	Zero(&myop, 1, UNOP);
666	myop.op_next = Nullop;
667	myop.op_flags = OPf_WANT_VOID;
668
669	PUSHMARK(SP);
670	XPUSHs (sub_init);
671	/*
672	* the next line is slightly wrong, as PL_op->op_next
673	* is actually being executed so we skip the first op.
674	* that doesn't matter, though, since it is only
675	* pp_nextstate and we never return...
676	* ah yes, and I don't care anyways ;)
677	*/
678	PUTBACK;
679	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
680	SPAGAIN;
681
682	ENTER; /* necessary e.g. for dounwind */
683	}
684	}	811	}
685		812
686	static void	813	static void
687	continue_coro (void *arg)	814	free_coro_mortal (pTHX)
688	{	815	{
689	/*	816	if (expect_true (coro_mortal))
690	* this is a _very_ stripped down perl interpreter ;)	817	{
691	*/	818	SvREFCNT_dec (coro_mortal);
692	dTHX;	819	coro_mortal = 0;
693	Coro__State ctx = (Coro__State)arg;
694	JMPENV coro_start_env;
695
696	PL_top_env = &ctx->start_env;
697
698	ctx->cursp = 0;
699	PL_op = PL_op->op_next;
700	CALLRUNOPS(aTHX);
701
702	abort ();
703	}
704
705	STATIC void
706	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
707	{
708	dSTACKLEVEL;
709
710	if (prev != next)
711	{	820	}
712	if (next->mainstack)	821	}
		822
		823	static int
		824	runops_trace (pTHX)
		825	{
		826	COP *oldcop = 0;
		827	int oldcxix = -2;
		828	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		829	coro_cctx *cctx = coro->cctx;
		830
		831	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		832	{
		833	PERL_ASYNC_CHECK ();
		834
		835	if (cctx->flags & CC_TRACE_ALL)
713	{	836	{
714	LOCK;	837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
715	SAVE (prev, flags);
716	LOAD (next);
717	UNLOCK;
718
719	/* mark this state as in-use */
720	next->mainstack = 0;
721	next->tmps_ix = -2;
722
723	/* stacklevel changed? if yes, grab the stack for us! */
724	if (flags & TRANSFER_SAVE_CCTXT)
725	{	838	{
726	if (!prev->stack)	839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
727	allocate_stack (prev, 0);	840	SV **bot, **top;
728	else if (prev->cursp != stacklevel	841	AV *av = newAV (); /* return values */
729	&& prev->stack->usecnt > 1)	842	SV **cb;
		843	dSP;
		844
		845	GV *gv = CvGV (cx->blk_sub.cv);
		846	SV *fullname = sv_2mortal (newSV (0));
		847	if (isGV (gv))
		848	gv_efullname3 (fullname, gv, 0);
		849
		850	bot = PL_stack_base + cx->blk_oldsp + 1;
		851	top = cx->blk_gimme == G_ARRAY ? SP + 1
		852	: cx->blk_gimme == G_SCALAR ? bot + 1
		853	: bot;
		854
		855	av_extend (av, top - bot);
		856	while (bot < top)
		857	av_push (av, SvREFCNT_inc (*bot++));
		858
		859	PL_runops = RUNOPS_DEFAULT;
		860	ENTER;
		861	SAVETMPS;
		862	EXTEND (SP, 3);
		863	PUSHMARK (SP);
		864	PUSHs (&PL_sv_no);
		865	PUSHs (fullname);
		866	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		867	PUTBACK;
		868	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		869	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		870	SPAGAIN;
		871	FREETMPS;
		872	LEAVE;
		873	PL_runops = runops_trace;
		874	}
		875
		876	if (oldcop != PL_curcop)
		877	{
		878	oldcop = PL_curcop;
		879
		880	if (PL_curcop != &PL_compiling)
730	{	881	{
731	prev->gencnt = ++prev->stack->gencnt;	882	SV **cb;
732	prev->stack->usecnt = 1;
733	}
734		883
735	/* has our stack been invalidated? */	884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
736	if (next->stack && next->stack->gencnt != next->gencnt)
737	{	885	{
738	deallocate_stack (next);	886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
739	allocate_stack (next, 1);	887
740	coro_create (&(next->stack->cctx),	888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
741	continue_coro, (void *)next,	889	{
742	next->stack->sptr, labs (next->stack->ssize));	890	runops_proc_t old_runops = PL_runops;
		891	dSP;
		892	GV *gv = CvGV (cx->blk_sub.cv);
		893	SV *fullname = sv_2mortal (newSV (0));
		894
		895	if (isGV (gv))
		896	gv_efullname3 (fullname, gv, 0);
		897
		898	PL_runops = RUNOPS_DEFAULT;
		899	ENTER;
		900	SAVETMPS;
		901	EXTEND (SP, 3);
		902	PUSHMARK (SP);
		903	PUSHs (&PL_sv_yes);
		904	PUSHs (fullname);
		905	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		906	PUTBACK;
		907	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		908	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		909	SPAGAIN;
		910	FREETMPS;
		911	LEAVE;
		912	PL_runops = runops_trace;
		913	}
		914
		915	oldcxix = cxstack_ix;
743	}	916	}
744		917
745	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	918	if (cctx->flags & CC_TRACE_LINE)
746	prev->cursp = stacklevel;
747	/* don't add any code here */
748	}
749	else
750	next->cursp = stacklevel;
751	}
752	else if (next->tmps_ix == -2)
753	croak ("tried to transfer to running coroutine");
754	else
755	{
756	LOCK;
757	SAVE (prev, -1); /* first get rid of the old state */
758	UNLOCK;
759
760	if (flags & TRANSFER_SAVE_CCTXT)
761	{
762	if (!prev->stack)
763	allocate_stack (prev, 0);
764
765	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
766	{	919	{
767	PL_top_env = &next->start_env;	920	dSP;
768		921
769	setup_coro (next);	922	PL_runops = RUNOPS_DEFAULT;
770	next->cursp = stacklevel;	923	ENTER;
771		924	SAVETMPS;
772	prev->stack->refcnt++;	925	EXTEND (SP, 3);
773	prev->stack->usecnt++;	926	PL_runops = RUNOPS_DEFAULT;
774	next->stack = prev->stack;	927	PUSHMARK (SP);
775	next->gencnt = prev->gencnt;	928	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		929	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		930	PUTBACK;
		931	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		932	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		933	SPAGAIN;
		934	FREETMPS;
		935	LEAVE;
		936	PL_runops = runops_trace;
776	}	937	}
777	else
778	{
779	assert (!next->stack);
780	allocate_stack (next, 1);
781	coro_create (&(next->stack->cctx),
782	setup_coro, (void *)next,
783	next->stack->sptr, labs (next->stack->ssize));
784	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
785	prev->cursp = stacklevel;
786	/* don't add any code here */
787	}	938	}
788	}	939	}
		940	}
		941	}
		942
		943	TAINT_NOT;
		944	return 0;
		945	}
		946
		947	/* inject a fake call to Coro::State::_cctx_init into the execution */
		948	/* _cctx_init should be careful, as it could be called at almost any time */
		949	/* during execution of a perl program */
		950	static void NOINLINE
		951	cctx_prepare (pTHX_ coro_cctx *cctx)
		952	{
		953	dSP;
		954	LOGOP myop;
		955
		956	PL_top_env = &PL_start_env;
		957
		958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
		960
		961	Zero (&myop, 1, LOGOP);
		962	myop.op_next = PL_op;
		963	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		964
		965	PUSHMARK (SP);
		966	EXTEND (SP, 2);
		967	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		968	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		969	PUTBACK;
		970	PL_op = (OP *)&myop;
		971	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		972	SPAGAIN;
		973	}
		974
		975	/*
		976	* this is a _very_ stripped down perl interpreter ;)
		977	*/
		978	static void
		979	cctx_run (void *arg)
		980	{
		981	dTHX;
		982
		983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		984	UNLOCK;
		985
		986	/* we now skip the entersub that lead to transfer() */
		987	PL_op = PL_op->op_next;
		988
		989	/* inject a fake subroutine call to cctx_init */
		990	cctx_prepare (aTHX_ (coro_cctx *)arg);
		991
		992	/* somebody or something will hit me for both perl_run and PL_restartop */
		993	PL_restartop = PL_op;
		994	perl_run (PL_curinterp);
		995
		996	/*
		997	* If perl-run returns we assume exit() was being called or the coro
		998	* fell off the end, which seems to be the only valid (non-bug)
		999	* reason for perl_run to return. We try to exit by jumping to the
		1000	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1001	* coroutine as Coro has no such concept
		1002	*/
		1003	PL_top_env = main_top_env;
		1004	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1005	}
		1006
		1007	static coro_cctx *
		1008	cctx_new ()
		1009	{
		1010	coro_cctx *cctx;
		1011	void *stack_start;
		1012	size_t stack_size;
		1013
		1014	++cctx_count;
		1015
		1016	Newz (0, cctx, 1, coro_cctx);
		1017
		1018	#if HAVE_MMAP
		1019	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1020	/* mmap supposedly does allocate-on-write for us */
		1021	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1022
		1023	if (cctx->sptr != (void *)-1)
		1024	{
		1025	# if CORO_STACKGUARD
		1026	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1027	# endif
		1028	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1029	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1030	cctx->flags |= CC_MAPPED;
		1031	}
		1032	else
		1033	#endif
		1034	{
		1035	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1036	New (0, cctx->sptr, coro_stacksize, long);
		1037
		1038	if (!cctx->sptr)
		1039	{
		1040	perror ("FATAL: unable to allocate stack for coroutine");
		1041	_exit (EXIT_FAILURE);
		1042	}
		1043
		1044	stack_start = cctx->sptr;
		1045	stack_size = cctx->ssize;
		1046	}
		1047
		1048	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1049	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1050
		1051	return cctx;
		1052	}
		1053
		1054	static void
		1055	cctx_destroy (coro_cctx *cctx)
		1056	{
		1057	if (!cctx)
		1058	return;
		1059
		1060	--cctx_count;
		1061
		1062	#if CORO_USE_VALGRIND
		1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1064	#endif
		1065
		1066	#if HAVE_MMAP
		1067	if (cctx->flags & CC_MAPPED)
		1068	munmap (cctx->sptr, cctx->ssize);
		1069	else
		1070	#endif
		1071	Safefree (cctx->sptr);
		1072
		1073	Safefree (cctx);
		1074	}
		1075
		1076	/* wether this cctx should be destructed */
		1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1078
		1079	static coro_cctx *
		1080	cctx_get (pTHX)
		1081	{
		1082	while (expect_true (cctx_first))
		1083	{
		1084	coro_cctx *cctx = cctx_first;
		1085	cctx_first = cctx->next;
		1086	--cctx_idle;
		1087
		1088	if (expect_true (!CCTX_EXPIRED (cctx)))
		1089	return cctx;
		1090
		1091	cctx_destroy (cctx);
		1092	}
		1093
		1094	return cctx_new ();
		1095	}
		1096
		1097	static void
		1098	cctx_put (coro_cctx *cctx)
		1099	{
		1100	/* free another cctx if overlimit */
		1101	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1102	{
		1103	coro_cctx *first = cctx_first;
		1104	cctx_first = first->next;
		1105	--cctx_idle;
		1106
		1107	cctx_destroy (first);
		1108	}
		1109
		1110	++cctx_idle;
		1111	cctx->next = cctx_first;
		1112	cctx_first = cctx;
		1113	}
		1114
		1115	/** coroutine switching *****************************************************/
		1116
		1117	static void
		1118	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1119	{
		1120	if (expect_true (prev != next))
		1121	{
		1122	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1123	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1124
		1125	if (expect_false (next->flags & CF_RUNNING))
		1126	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1127
		1128	if (expect_false (next->flags & CF_DESTROYED))
		1129	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (
		1132	#if PERL_VERSION_ATLEAST (5,9,0)
		1133	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
		1134	#else
		1135	expect_false (PL_lex_state != LEX_NOTPARSING)
		1136	#endif
		1137	)
		1138	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1139	}
		1140	}
		1141
		1142	/* always use the TRANSFER macro */
		1143	static void NOINLINE
		1144	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
		1145	{
		1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
		1148
		1149	/* sometimes transfer is only called to set idle_sp */
		1150	if (expect_false (!next))
		1151	{
		1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1153	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1154	}
		1155	else if (expect_true (prev != next))
		1156	{
		1157	coro_cctx *prev__cctx;
		1158
		1159	if (expect_false (prev->flags & CF_NEW))
		1160	{
		1161	/* create a new empty context */
		1162	Newz (0, prev->cctx, 1, coro_cctx);
		1163	prev->flags &= ~CF_NEW;
		1164	prev->flags |= CF_RUNNING;
		1165	}
		1166
		1167	prev->flags &= ~CF_RUNNING;
		1168	next->flags |= CF_RUNNING;
		1169
		1170	LOCK;
		1171
		1172	/* first get rid of the old state */
		1173	save_perl (aTHX_ prev);
		1174
		1175	if (expect_false (next->flags & CF_NEW))
		1176	{
		1177	/* need to start coroutine */
		1178	next->flags &= ~CF_NEW;
		1179	/* setup coroutine call */
		1180	coro_setup (aTHX_ next);
		1181	}
789	else	1182	else
		1183	load_perl (aTHX_ next);
		1184
		1185	prev__cctx = prev->cctx;
		1186
		1187	/* possibly "free" the cctx */
		1188	if (expect_true (
		1189	prev__cctx->idle_sp == STACKLEVEL
		1190	&& !(prev__cctx->flags & CC_TRACE)
		1191	&& !force_cctx
		1192	))
		1193	{
		1194	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1195	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1196
		1197	prev->cctx = 0;
		1198
		1199	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1200	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1201	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1202	if (!next->cctx)
		1203	next->cctx = cctx_get (aTHX);
		1204
		1205	cctx_put (prev__cctx);
		1206	}
		1207
		1208	++next->usecount;
		1209
		1210	if (expect_true (!next->cctx))
		1211	next->cctx = cctx_get (aTHX);
		1212
		1213	has_throw = !!next->throw;
		1214
		1215	if (expect_false (prev__cctx != next->cctx))
		1216	{
		1217	prev__cctx->top_env = PL_top_env;
		1218	PL_top_env = next->cctx->top_env;
		1219	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1220	}
		1221
		1222	free_coro_mortal (aTHX);
		1223	UNLOCK;
		1224
		1225	if (expect_false (has_throw))
		1226	{
		1227	struct coro *coro = SvSTATE (coro_current);
		1228
		1229	if (coro->throw)
790	{	1230	{
		1231	SV *exception = coro->throw;
		1232	coro->throw = 0;
		1233	sv_setsv (ERRSV, exception);
791	setup_coro (next);	1234	croak (0);
792	next->cursp = stacklevel;
793	}	1235	}
794	}	1236	}
795	}	1237	}
		1238	}
		1239
		1240	struct transfer_args
		1241	{
		1242	struct coro *prev, *next;
		1243	};
		1244
		1245	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1246	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1247
		1248	/** high level stuff ********************************************************/
		1249
		1250	static int
		1251	coro_state_destroy (pTHX_ struct coro *coro)
		1252	{
		1253	if (coro->flags & CF_DESTROYED)
		1254	return 0;
		1255
		1256	coro->flags |= CF_DESTROYED;
		1257
		1258	if (coro->flags & CF_READY)
		1259	{
		1260	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1261	/* alternative: look through all ready queues and remove the coro */
		1262	LOCK;
		1263	--coro_nready;
		1264	UNLOCK;
		1265	}
		1266	else
		1267	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1268
		1269	if (coro->mainstack && coro->mainstack != main_mainstack)
		1270	{
		1271	struct coro temp;
		1272
		1273	if (coro->flags & CF_RUNNING)
		1274	croak ("FATAL: tried to destroy currently running coroutine");
		1275
		1276	save_perl (aTHX_ &temp);
		1277	load_perl (aTHX_ coro);
		1278
		1279	coro_destroy (aTHX_ coro);
		1280
		1281	load_perl (aTHX_ &temp);
		1282
		1283	coro->slot = 0;
		1284	}
		1285
		1286	cctx_destroy (coro->cctx);
		1287	SvREFCNT_dec (coro->args);
		1288
		1289	if (coro->next) coro->next->prev = coro->prev;
		1290	if (coro->prev) coro->prev->next = coro->next;
		1291	if (coro == coro_first) coro_first = coro->next;
		1292
		1293	return 1;
		1294	}
		1295
		1296	static int
		1297	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1298	{
		1299	struct coro *coro = (struct coro *)mg->mg_ptr;
		1300	mg->mg_ptr = 0;
		1301
		1302	coro->hv = 0;
		1303
		1304	if (--coro->refcnt < 0)
		1305	{
		1306	coro_state_destroy (aTHX_ coro);
		1307	Safefree (coro);
		1308	}
		1309
		1310	return 0;
		1311	}
		1312
		1313	static int
		1314	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1315	{
		1316	struct coro *coro = (struct coro *)mg->mg_ptr;
		1317
		1318	++coro->refcnt;
		1319
		1320	return 0;
		1321	}
		1322
		1323	static MGVTBL coro_state_vtbl = {
		1324	0, 0, 0, 0,
		1325	coro_state_free,
		1326	0,
		1327	#ifdef MGf_DUP
		1328	coro_state_dup,
		1329	#else
		1330	# define MGf_DUP 0
		1331	#endif
		1332	};
		1333
		1334	static void
		1335	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1336	{
		1337	ta->prev = SvSTATE (prev_sv);
		1338	ta->next = SvSTATE (next_sv);
		1339	TRANSFER_CHECK (*ta);
		1340	}
		1341
		1342	static void
		1343	api_transfer (SV *prev_sv, SV *next_sv)
		1344	{
		1345	dTHX;
		1346	struct transfer_args ta;
		1347
		1348	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1349	TRANSFER (ta, 1);
		1350	}
		1351
		1352	/** Coro ********************************************************************/
		1353
		1354	static void
		1355	coro_enq (pTHX_ SV *coro_sv)
		1356	{
		1357	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1358	}
		1359
		1360	static SV *
		1361	coro_deq (pTHX)
		1362	{
		1363	int prio;
		1364
		1365	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1366	if (AvFILLp (coro_ready [prio]) >= 0)
		1367	return av_shift (coro_ready [prio]);
		1368
		1369	return 0;
		1370	}
		1371
		1372	static int
		1373	api_ready (SV *coro_sv)
		1374	{
		1375	dTHX;
		1376	struct coro *coro;
		1377
		1378	if (SvROK (coro_sv))
		1379	coro_sv = SvRV (coro_sv);
		1380
		1381	coro = SvSTATE (coro_sv);
		1382
		1383	if (coro->flags & CF_READY)
		1384	return 0;
		1385
		1386	coro->flags |= CF_READY;
796		1387
797	LOCK;	1388	LOCK;
798	if (coro_mortal)	1389	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
799	{	1390	++coro_nready;
800	SvREFCNT_dec (coro_mortal);
801	coro_mortal = 0;
802	}
803	UNLOCK;	1391	UNLOCK;
804	}
805		1392
806	#define SV_CORO(sv,func) \	1393	return 1;
807	do { \	1394	}
808	if (SvROK (sv)) \
809	sv = SvRV (sv); \
810	\
811	if (SvTYPE (sv) == SVt_PVHV) \
812	{ \
813	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
814	\
815	if (!he) \
816	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
817	\
818	(sv) = SvRV (HeVAL(he)); \
819	} \
820	\
821	/* must also be changed inside Coro::Cont::yield */ \
822	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
823	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
824	\
825	} while(0)
826		1395
827	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1396	static int
		1397	api_is_ready (SV *coro_sv)
		1398	{
		1399	dTHX;
		1400	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1401	}
828		1402
829	static void	1403	static void
830	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1404	prepare_schedule (pTHX_ struct transfer_args *ta)
831	{	1405	{
832	SV_CORO (prev, "Coro::transfer");	1406	SV *prev_sv, *next_sv;
833	SV_CORO (next, "Coro::transfer");
834		1407
835	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1408	for (;;)
836	}	1409	{
		1410	LOCK;
		1411	next_sv = coro_deq (aTHX);
837		1412
838	/** Coro ********************************************************************/	1413	/* nothing to schedule: call the idle handler */
		1414	if (expect_false (!next_sv))
		1415	{
		1416	dSP;
		1417	UNLOCK;
839		1418
840	#define PRIO_MAX 3	1419	ENTER;
841	#define PRIO_HIGH 1	1420	SAVETMPS;
842	#define PRIO_NORMAL 0
843	#define PRIO_LOW -1
844	#define PRIO_IDLE -3
845	#define PRIO_MIN -4
846		1421
847	/* for Coro.pm */	1422	PUSHMARK (SP);
848	static GV *coro_current, *coro_idle;	1423	PUTBACK;
849	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	1424	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
850	static int coro_nready;	1425	SPAGAIN;
		1426
		1427	FREETMPS;
		1428	LEAVE;
		1429	continue;
		1430	}
		1431
		1432	ta->next = SvSTATE (next_sv);
		1433
		1434	/* cannot transfer to destroyed coros, skip and look for next */
		1435	if (expect_false (ta->next->flags & CF_DESTROYED))
		1436	{
		1437	UNLOCK;
		1438	SvREFCNT_dec (next_sv);
		1439	/* coro_nready is already taken care of by destroy */
		1440	continue;
		1441	}
		1442
		1443	--coro_nready;
		1444	UNLOCK;
		1445	break;
		1446	}
		1447
		1448	/* free this only after the transfer */
		1449	prev_sv = SvRV (coro_current);
		1450	ta->prev = SvSTATE (prev_sv);
		1451	TRANSFER_CHECK (*ta);
		1452	assert (ta->next->flags & CF_READY);
		1453	ta->next->flags &= ~CF_READY;
		1454	SvRV_set (coro_current, next_sv);
		1455
		1456	LOCK;
		1457	free_coro_mortal (aTHX);
		1458	coro_mortal = prev_sv;
		1459	UNLOCK;
		1460	}
851		1461
852	static void	1462	static void
853	coro_enq (pTHX_ SV *sv)	1463	prepare_cede (pTHX_ struct transfer_args *ta)
854	{	1464	{
855	if (SvTYPE (sv) == SVt_PVHV)	1465	api_ready (coro_current);
856	{	1466	prepare_schedule (aTHX_ ta);
857	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	1467	}
858	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
859		1468
860	prio = prio > PRIO_MAX ? PRIO_MAX	1469	static int
861	: prio < PRIO_MIN ? PRIO_MIN	1470	prepare_cede_notself (pTHX_ struct transfer_args *ta)
862	: prio;	1471	{
863		1472	if (coro_nready)
864	av_push (coro_ready [prio - PRIO_MIN], sv);	1473	{
865	coro_nready++;	1474	SV *prev = SvRV (coro_current);
866		1475	prepare_schedule (aTHX_ ta);
		1476	api_ready (prev);
867	return;	1477	return 1;
868	}
869
870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
871	}
872
873	static SV *
874	coro_deq (pTHX_ int min_prio)
875	{
876	int prio = PRIO_MAX - PRIO_MIN;
877
878	min_prio -= PRIO_MIN;
879	if (min_prio < 0)
880	min_prio = 0;
881
882	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
883	if (av_len (coro_ready[prio]) >= 0)
884	{
885	coro_nready--;
886	return av_shift (coro_ready[prio]);
887	}	1478	}
888		1479	else
889	return 0;	1480	return 0;
890	}
891
892	static void
893	api_ready (SV *coro)
894	{
895	dTHX;
896
897	if (SvROK (coro))
898	coro = SvRV (coro);
899
900	LOCK;
901	coro_enq (aTHX_ SvREFCNT_inc (coro));
902	UNLOCK;
903	}	1481	}
904		1482
905	static void	1483	static void
906	api_schedule (void)	1484	api_schedule (void)
907	{	1485	{
908	dTHX;	1486	dTHX;
		1487	struct transfer_args ta;
909		1488
910	SV *prev, *next;	1489	prepare_schedule (aTHX_ &ta);
		1490	TRANSFER (ta, 1);
		1491	}
911		1492
912	LOCK;	1493	static int
		1494	api_cede (void)
		1495	{
		1496	dTHX;
		1497	struct transfer_args ta;
913		1498
914	prev = SvRV (GvSV (coro_current));	1499	prepare_cede (aTHX_ &ta);
915	next = coro_deq (aTHX_ PRIO_MIN);
916		1500
917	if (!next)	1501	if (expect_true (ta.prev != ta.next))
918	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1502	{
		1503	TRANSFER (ta, 1);
		1504	return 1;
		1505	}
		1506	else
		1507	return 0;
		1508	}
919		1509
920	/* free this only after the transfer */	1510	static int
921	coro_mortal = prev;	1511	api_cede_notself (void)
922	SV_CORO (prev, "Coro::schedule");	1512	{
		1513	dTHX;
		1514	struct transfer_args ta;
923		1515
924	SvRV (GvSV (coro_current)) = next;	1516	if (prepare_cede_notself (aTHX_ &ta))
925		1517	{
926	SV_CORO (next, "Coro::schedule");	1518	TRANSFER (ta, 1);
927		1519	return 1;
928	UNLOCK;	1520	}
929		1521	else
930	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1522	return 0;
931	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
932	}	1523	}
933		1524
934	static void	1525	static void
935	api_cede (void)	1526	api_trace (SV *coro_sv, int flags)
936	{	1527	{
937	dTHX;	1528	dTHX;
		1529	struct coro *coro = SvSTATE (coro_sv);
938		1530
939	LOCK;	1531	if (flags & CC_TRACE)
940	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1532	{
941	UNLOCK;	1533	if (!coro->cctx)
		1534	coro->cctx = cctx_new ();
		1535	else if (!(coro->cctx->flags & CC_TRACE))
		1536	croak ("cannot enable tracing on coroutine with custom stack");
942		1537
943	api_schedule ();	1538	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
944	}	1539	}
		1540	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1541	{
		1542	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
945		1543
		1544	if (coro->flags & CF_RUNNING)
		1545	PL_runops = RUNOPS_DEFAULT;
		1546	else
		1547	coro->slot->runops = RUNOPS_DEFAULT;
		1548	}
		1549	}
		1550
946	MODULE = Coro::State PACKAGE = Coro::State	1551	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
947		1552
948	PROTOTYPES: ENABLE	1553	PROTOTYPES: DISABLE
949		1554
950	BOOT:	1555	BOOT:
951	{ /* {} necessary for stoopid perl-5.6.x */	1556	{
952	#ifdef USE_ITHREADS	1557	#ifdef USE_ITHREADS
953	MUTEX_INIT (&coro_mutex);	1558	MUTEX_INIT (&coro_mutex);
954	#endif	1559	#endif
		1560	BOOT_PAGESIZE;
955		1561
956	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1562	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
957	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1563	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1564
		1565	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1566	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1567	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1568	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1569
		1570	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1571	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1572	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1573
958	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1574	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959		1575
960	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1576	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
961	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1577	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
962	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1578	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
963	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1579	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
964		1580
965	main_mainstack = PL_mainstack;	1581	main_mainstack = PL_mainstack;
		1582	main_top_env = PL_top_env;
		1583
		1584	while (main_top_env->je_prev)
		1585	main_top_env = main_top_env->je_prev;
966		1586
967	coroapi.ver = CORO_API_VERSION;	1587	coroapi.ver = CORO_API_VERSION;
		1588	coroapi.rev = CORO_API_REVISION;
968	coroapi.transfer = api_transfer;	1589	coroapi.transfer = api_transfer;
969	}
970		1590
971	Coro::State	1591	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
972	_newprocess(args)	1592	}
973	SV * args	1593
974	PROTOTYPE: $	1594	SV *
		1595	new (char *klass, ...)
975	CODE:	1596	CODE:
976	Coro__State coro;	1597	{
		1598	struct coro *coro;
		1599	MAGIC *mg;
		1600	HV *hv;
		1601	int i;
977		1602
978	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
979	croak ("Coro::State::_newprocess expects an arrayref");
980
981	Newz (0, coro, 1, struct coro);	1603	Newz (0, coro, 1, struct coro);
		1604	coro->args = newAV ();
		1605	coro->flags = CF_NEW;
982		1606
983	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1607	if (coro_first) coro_first->prev = coro;
984	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1608	coro->next = coro_first;
985	/*coro->stack = 0;*/	1609	coro_first = coro;
986		1610
987	/* same as JMPENV_BOOTSTRAP */	1611	coro->hv = hv = newHV ();
988	/* we might be able to recycle start_env, but safe is safe */	1612	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
989	/*Zero(&coro->start_env, 1, JMPENV);*/	1613	mg->mg_flags |= MGf_DUP;
990	coro->start_env.je_ret = -1;	1614	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991	coro->start_env.je_mustcatch = TRUE;
992		1615
993	RETVAL = coro;	1616	av_extend (coro->args, items - 1);
		1617	for (i = 1; i < items; i++)
		1618	av_push (coro->args, newSVsv (ST (i)));
		1619	}
994	OUTPUT:	1620	OUTPUT:
995	RETVAL	1621	RETVAL
996		1622
		1623	# these not obviously related functions are all rolled into the same xs
		1624	# function to increase chances that they all will call transfer with the same
		1625	# stack offset
997	void	1626	void
998	transfer(prev, next, flags)	1627	_set_stacklevel (...)
999	SV *prev	1628	ALIAS:
1000	SV *next	1629	Coro::State::transfer = 1
1001	int flags	1630	Coro::schedule = 2
1002	PROTOTYPE: @	1631	Coro::cede = 3
		1632	Coro::cede_notself = 4
1003	CODE:	1633	CODE:
		1634	{
		1635	struct transfer_args ta;
		1636
1004	PUTBACK;	1637	PUTBACK;
1005	SV_CORO (next, "Coro::transfer");	1638	switch (ix)
1006	SV_CORO (prev, "Coro::transfer");	1639	{
1007	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1640	case 0:
		1641	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1642	ta.next = 0;
		1643	break;
		1644
		1645	case 1:
		1646	if (items != 2)
		1647	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1648
		1649	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1650	break;
		1651
		1652	case 2:
		1653	prepare_schedule (aTHX_ &ta);
		1654	break;
		1655
		1656	case 3:
		1657	prepare_cede (aTHX_ &ta);
		1658	break;
		1659
		1660	case 4:
		1661	if (!prepare_cede_notself (aTHX_ &ta))
		1662	XSRETURN_EMPTY;
		1663
		1664	break;
		1665	}
1008	SPAGAIN;	1666	SPAGAIN;
1009		1667
		1668	BARRIER;
		1669	PUTBACK;
		1670	TRANSFER (ta, 0);
		1671	SPAGAIN; /* might be the sp of a different coroutine now */
		1672	/* be extra careful not to ever do anything after TRANSFER */
		1673	}
		1674
		1675	bool
		1676	_destroy (SV *coro_sv)
		1677	CODE:
		1678	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1679	OUTPUT:
		1680	RETVAL
		1681
1010	void	1682	void
1011	DESTROY(coro)
1012	Coro::State coro
1013	CODE:
1014
1015	if (coro->mainstack && coro->mainstack != main_mainstack)
1016	{
1017	struct coro temp;
1018
1019	PUTBACK;
1020	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1021	LOAD (aTHX_ coro);
1022	SPAGAIN;
1023
1024	destroy_stacks (aTHX);
1025
1026	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1027	SPAGAIN;
1028
1029	coro->mainstack = 0;
1030	}
1031
1032	deallocate_stack (coro);
1033	SvREFCNT_dec (coro->args);
1034	Safefree (coro);
1035
1036	void
1037	_exit(code)	1683	_exit (code)
1038	int code	1684	int code
1039	PROTOTYPE: $	1685	PROTOTYPE: $
1040	CODE:	1686	CODE:
1041	_exit (code);	1687	_exit (code);
1042		1688
1043	MODULE = Coro::State PACKAGE = Coro::Cont	1689	int
		1690	cctx_stacksize (int new_stacksize = 0)
		1691	CODE:
		1692	RETVAL = coro_stacksize;
		1693	if (new_stacksize)
		1694	coro_stacksize = new_stacksize;
		1695	OUTPUT:
		1696	RETVAL
1044		1697
1045	# this is slightly dirty (should expose a c-level api)	1698	int
		1699	cctx_count ()
		1700	CODE:
		1701	RETVAL = cctx_count;
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	int
		1706	cctx_idle ()
		1707	CODE:
		1708	RETVAL = cctx_idle;
		1709	OUTPUT:
		1710	RETVAL
1046		1711
1047	void	1712	void
1048	yield(...)	1713	list ()
1049	PROTOTYPE: @	1714	PPCODE:
		1715	{
		1716	struct coro *coro;
		1717	for (coro = coro_first; coro; coro = coro->next)
		1718	if (coro->hv)
		1719	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1720	}
		1721
		1722	void
		1723	call (Coro::State coro, SV *coderef)
		1724	ALIAS:
		1725	eval = 1
		1726	CODE:
		1727	{
		1728	if (coro->mainstack)
		1729	{
		1730	struct coro temp;
		1731
		1732	if (!(coro->flags & CF_RUNNING))
		1733	{
		1734	PUTBACK;
		1735	save_perl (aTHX_ &temp);
		1736	load_perl (aTHX_ coro);
		1737	}
		1738
		1739	{
		1740	dSP;
		1741	ENTER;
		1742	SAVETMPS;
		1743	PUTBACK;
		1744	PUSHSTACK;
		1745	PUSHMARK (SP);
		1746
		1747	if (ix)
		1748	eval_sv (coderef, 0);
		1749	else
		1750	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1751
		1752	POPSTACK;
		1753	SPAGAIN;
		1754	FREETMPS;
		1755	LEAVE;
		1756	PUTBACK;
		1757	}
		1758
		1759	if (!(coro->flags & CF_RUNNING))
		1760	{
		1761	save_perl (aTHX_ coro);
		1762	load_perl (aTHX_ &temp);
		1763	SPAGAIN;
		1764	}
		1765	}
		1766	}
		1767
		1768	SV *
		1769	is_ready (Coro::State coro)
		1770	PROTOTYPE: $
		1771	ALIAS:
		1772	is_ready = CF_READY
		1773	is_running = CF_RUNNING
		1774	is_new = CF_NEW
		1775	is_destroyed = CF_DESTROYED
		1776	CODE:
		1777	RETVAL = boolSV (coro->flags & ix);
		1778	OUTPUT:
		1779	RETVAL
		1780
		1781	void
		1782	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1783
		1784	SV *
		1785	has_stack (Coro::State coro)
		1786	PROTOTYPE: $
		1787	CODE:
		1788	RETVAL = boolSV (!!coro->cctx);
		1789	OUTPUT:
		1790	RETVAL
		1791
		1792	int
		1793	is_traced (Coro::State coro)
		1794	PROTOTYPE: $
		1795	CODE:
		1796	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1797	OUTPUT:
		1798	RETVAL
		1799
		1800	IV
		1801	rss (Coro::State coro)
		1802	PROTOTYPE: $
		1803	ALIAS:
		1804	usecount = 1
1050	CODE:	1805	CODE:
1051	static SV *returnstk;	1806	switch (ix)
1052	SV *sv;	1807	{
1053	AV *defav = GvAV (PL_defgv);	1808	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1054	struct coro *prev, *next;	1809	case 1: RETVAL = coro->usecount; break;
		1810	}
		1811	OUTPUT:
		1812	RETVAL
1055		1813
1056	if (!returnstk)	1814	void
1057	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));	1815	force_cctx ()
1058		1816	CODE:
1059	/* set up @_ -- ugly */	1817	struct coro *coro = SvSTATE (coro_current);
1060	av_clear (defav);	1818	coro->cctx->idle_sp = 0;
1061	av_fill (defav, items - 1);
1062	while (items--)
1063	av_store (defav, items, SvREFCNT_inc (ST(items)));
1064
1065	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1066	sv = av_pop ((AV *)SvRV (returnstk));
1067	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1068	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1069	SvREFCNT_dec (sv);
1070
1071	transfer (aTHX_ prev, next, 0);
1072		1819
1073	MODULE = Coro::State PACKAGE = Coro	1820	MODULE = Coro::State PACKAGE = Coro
1074		1821
1075	# this is slightly dirty (should expose a c-level api)
1076
1077	BOOT:	1822	BOOT:
1078	{	1823	{
1079	int i;	1824	int i;
		1825
		1826	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1827	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1828	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1829
		1830	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1831	SvREADONLY_on (coro_current);
		1832
1080	HV *stash = gv_stashpv ("Coro", TRUE);	1833	coro_stash = gv_stashpv ("Coro", TRUE);
1081		1834
1082	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1835	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1836	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1837	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1838	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1839	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1840	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1088
1089	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1090	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1091		1841
1092	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1842	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1093	coro_ready[i] = newAV ();	1843	coro_ready[i] = newAV ();
1094		1844
1095	{	1845	{
1096	SV *sv = perl_get_sv("Coro::API", 1);	1846	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1847	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1097		1848
1098	coroapi.schedule = api_schedule;	1849	coroapi.schedule = api_schedule;
1099	coroapi.cede = api_cede;	1850	coroapi.cede = api_cede;
		1851	coroapi.cede_notself = api_cede_notself;
1100	coroapi.ready = api_ready;	1852	coroapi.ready = api_ready;
		1853	coroapi.is_ready = api_is_ready;
1101	coroapi.nready = &coro_nready;	1854	coroapi.nready = &coro_nready;
1102	coroapi.current = coro_current;	1855	coroapi.current = coro_current;
1103		1856
1104	GCoroAPI = &coroapi;	1857	GCoroAPI = &coroapi;
1105	sv_setiv(sv, (IV)&coroapi);	1858	sv_setiv (sv, (IV)&coroapi);
1106	SvREADONLY_on(sv);	1859	SvREADONLY_on (sv);
1107	}	1860	}
1108	}	1861	}
1109		1862
1110	#if !PERL_MICRO
1111
1112	void	1863	void
1113	ready(self)	1864	_set_current (SV *current)
1114	SV * self
1115	PROTOTYPE: $	1865	PROTOTYPE: $
1116	CODE:	1866	CODE:
1117	api_ready (self);	1867	SvREFCNT_dec (SvRV (coro_current));
1118		1868	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1119	#endif
1120		1869
1121	int	1870	int
		1871	prio (Coro::State coro, int newprio = 0)
		1872	ALIAS:
		1873	nice = 1
		1874	CODE:
		1875	{
		1876	RETVAL = coro->prio;
		1877
		1878	if (items > 1)
		1879	{
		1880	if (ix)
		1881	newprio = coro->prio - newprio;
		1882
		1883	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1884	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1885
		1886	coro->prio = newprio;
		1887	}
		1888	}
		1889	OUTPUT:
		1890	RETVAL
		1891
		1892	SV *
		1893	ready (SV *self)
		1894	PROTOTYPE: $
		1895	CODE:
		1896	RETVAL = boolSV (api_ready (self));
		1897	OUTPUT:
		1898	RETVAL
		1899
		1900	int
1122	nready(...)	1901	nready (...)
1123	PROTOTYPE:	1902	PROTOTYPE:
1124	CODE:	1903	CODE:
1125	RETVAL = coro_nready;	1904	RETVAL = coro_nready;
1126	OUTPUT:	1905	OUTPUT:
1127	RETVAL	1906	RETVAL
1128		1907
1129	void	1908	void
1130	schedule(...)	1909	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1910	PROTOTYPE: $;$
		1911	CODE:
		1912	SvREFCNT_dec (self->throw);
		1913	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1914
		1915	void
		1916	swap_defsv (Coro::State self)
1131	PROTOTYPE:	1917	PROTOTYPE: $
		1918	ALIAS:
		1919	swap_defav = 1
		1920	CODE:
		1921	if (!self->slot)
		1922	croak ("cannot swap state with coroutine that has no saved state");
		1923	else
		1924	{
		1925	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1926	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1927
		1928	SV *tmp = *src; *src = *dst; *dst = tmp;
		1929	}
		1930
		1931	# for async_pool speedup
		1932	void
		1933	_pool_1 (SV *cb)
1132	CODE:	1934	CODE:
1133	api_schedule ();	1935	{
		1936	struct coro *coro = SvSTATE (coro_current);
		1937	HV *hv = (HV *)SvRV (coro_current);
		1938	AV *defav = GvAV (PL_defgv);
		1939	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1940	AV *invoke_av;
		1941	int i, len;
		1942
		1943	if (!invoke)
		1944	{
		1945	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1946	croak ("\3async_pool terminate\2\n");
		1947	}
		1948
		1949	SvREFCNT_dec (coro->saved_deffh);
		1950	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1951
		1952	hv_store (hv, "desc", sizeof ("desc") - 1,
		1953	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1954
		1955	invoke_av = (AV *)SvRV (invoke);
		1956	len = av_len (invoke_av);
		1957
		1958	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1959
		1960	if (len > 0)
		1961	{
		1962	av_fill (defav, len - 1);
		1963	for (i = 0; i < len; ++i)
		1964	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1965	}
		1966
		1967	SvREFCNT_dec (invoke);
		1968	}
1134		1969
1135	void	1970	void
1136	cede(...)	1971	_pool_2 (SV *cb)
1137	PROTOTYPE:
1138	CODE:	1972	CODE:
1139	api_cede ();	1973	{
		1974	struct coro *coro = SvSTATE (coro_current);
1140		1975
		1976	sv_setsv (cb, &PL_sv_undef);
		1977
		1978	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1979	coro->saved_deffh = 0;
		1980
		1981	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1982	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1983	{
		1984	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1985	croak ("\3async_pool terminate\2\n");
		1986	}
		1987
		1988	av_clear (GvAV (PL_defgv));
		1989	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1990	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1991
		1992	coro->prio = 0;
		1993
		1994	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1995	api_trace (coro_current, 0);
		1996
		1997	av_push (av_async_pool, newSVsv (coro_current));
		1998	}
		1999
		2000
		2001	MODULE = Coro::State PACKAGE = Coro::AIO
		2002
		2003	SV *
		2004	_get_state ()
		2005	CODE:
		2006	{
		2007	struct io_state *data;
		2008
		2009	RETVAL = newSV (sizeof (struct io_state));
		2010	data = (struct io_state *)SvPVX (RETVAL);
		2011	SvCUR_set (RETVAL, sizeof (struct io_state));
		2012	SvPOK_only (RETVAL);
		2013
		2014	data->errorno = errno;
		2015	data->laststype = PL_laststype;
		2016	data->laststatval = PL_laststatval;
		2017	data->statcache = PL_statcache;
		2018	}
		2019	OUTPUT:
		2020	RETVAL
		2021
		2022	void
		2023	_set_state (char *data_)
		2024	PROTOTYPE: $
		2025	CODE:
		2026	{
		2027	struct io_state *data = (void *)data_;
		2028
		2029	errno = data->errorno;
		2030	PL_laststype = data->laststype;
		2031	PL_laststatval = data->laststatval;
		2032	PL_statcache = data->statcache;
		2033	}
		2034

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