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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs.
Revision 1.238 by root, Sat May 31 12:10:55 2008 UTC

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

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