[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.225 by root, Wed Mar 12 14:13:11 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	#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)
12	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
14	# endif	59	# endif
15	# ifndef call_sv	60	# ifndef call_sv
16	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
27	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
29	# endif	74	# endif
30	#endif	75	#endif
31		76
32	#include <errno.h>	77	/* 5.8.8 */
		78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
		90	/* 5.8.7 */
		91	#ifndef SvRV_set
		92	# define SvRV_set(s,v) SvRV(s) = (v)
		93	#endif
33		94
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	96	# 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	97	#endif
52	# include <limits.h>	98
53	# ifndef PAGESIZE	99	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	100	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	101	#endif
60	#endif
61		102
62	#define SUB_INIT "Coro::State::initialize"	103	/* prefer perl internal functions over our own? */
		104	#ifndef CORO_PREFER_PERL_FUNCTIONS
		105	# define CORO_PREFER_PERL_FUNCTIONS 0
		106	#endif
63		107
64	/* The next macro should declare a variable stacklevel that contains and approximation	108	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	109	* portable way as possible. */
66	* and should be unique. */	110	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	111	#define STACKLEVEL ((void *)&stacklevel)
68		112
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		114
71	#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))
72		129
73	#include "CoroAPI.h"	130	#include "CoroAPI.h"
74		131
75	#ifdef USE_ITHREADS	132	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	133	static perl_mutex coro_mutex;
…		…
79	#else	136	#else
80	# define LOCK (void)0	137	# define LOCK (void)0
81	# define UNLOCK (void)0	138	# define UNLOCK (void)0
82	#endif	139	#endif
83		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;
84	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
85	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;
86	static HV coro_state_stash, coro_stash;	154	static HV coro_state_stash, coro_stash;
87	static SV coro_mortal; / will be freed after next transfer */	155	static volatile SV coro_mortal; / will be freed after next transfer */
88		156
89	/* 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 */
90	typedef struct {	208	typedef struct {
91	int refcnt; /* pointer reference counter */	209	SV *defsv;
92	int usecnt; /* shared by how many coroutines */	210	AV *defav;
93	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;
94		217
95	coro_context cctx;	218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
96		219
97	void *sptr;	220	/* this is a structure representing a perl-level coroutine */
98	long ssize; /* positive == mmap, otherwise malloc */
99	} coro_stack;
100
101	struct coro {	221	struct coro {
102	/* the optional C context */	222	/* the c coroutine allocated to this perl coroutine, if any */
103	coro_stack *stack;	223	coro_cctx *cctx;
104	void *cursp;
105	int gencnt;
106		224
107	/* optionally saved, might be zero */	225	/* process data */
108	AV *defav;
109	SV *defsv;
110	SV *errsv;
111
112	/* saved global state not related to stacks */
113	U8 dowarn;
114	I32 in_eval;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;	226	AV *mainstack;
120	SV **stack_sp;	227	perl_slots slot; / basically the saved sp */
121	OP *op;	228
122	SV **curpad;	229	AV args; / data associated with this coroutine (initial args) */
123	AV *comppad;	230	int refcnt; /* coroutines are refcounted, yes */
124	CV *compcv;	231	int flags; /* CF_ flags */
125	SV **stack_base;	232	HV hv; / the perl hash associated with this coro, if any */
126	SV **stack_max;	233
127	SV **tmps_stack;	234	/* statistics */
128	I32 tmps_floor;	235	int usecount; /* number of transfers to this coro */
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146		236
147	/* coro process data */	237	/* coro process data */
148	int prio;	238	int prio;
		239	SV throw; / exception to be thrown */
149		240
150	/* data associated with this coroutine (initial args) */	241	/* async_pool */
151	AV *args;	242	SV *saved_deffh;
152	int refcnt;	243
		244	/* linked list */
		245	struct coro next, prev;
153	};	246	};
154		247
155	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
157		250
		251	/ Coro ******************************************************************/
		252
		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)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,9,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
		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
158	static AV *	298	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
160	{	300	{
161	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
162	AV newpadlist, newpad;	302	AV newpadlist, newpad;
163		303
164	newpadlist = newAV ();	304	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	305	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	306	#if PERL_VERSION_ATLEAST (5,9,0)
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		308	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	310	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	312	--AvFILLp (padlist);
173		313
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	314	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
209		349
210	/* casting is fun. */	350	/* casting is fun. */
211	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	351	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
212	free_padlist (aTHX_ padlist);	352	free_padlist (aTHX_ padlist);
213		353
214	SvREFCNT_dec (av);
215
216	return 0;	354	return 0;
217	}	355	}
218		356
219	#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
220		359
221	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))
222		400
223	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
224	static void	402	static void
225	get_padlist (pTHX_ CV *cv)	403	get_padlist (pTHX_ CV *cv)
226	{	404	{
227	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
		406	AV *av;
228		407
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	410	else
232	{	411	{
233	#if 0	412	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	413	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	414	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	415	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	416	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	417	SvREFCNT_dec (cp);
239	#else	418	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	422	}
244		423
245	static void	424	static void
246	put_padlist (pTHX_ CV *cv)	425	put_padlist (pTHX_ CV *cv)
247	{	426	{
248	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
		428	AV *av;
249		429
250	if (!mg)	430	if (expect_false (!mg))
251	{	431	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();
256	}
257		432
258	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	433	av = (AV *)mg->mg_obj;
259	}
260		434
261	#define SB do {	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	436	av_extend (av, AvMAX (av) + 1);
263		437
264	#define LOAD(state) load_state(aTHX_ (state));	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	439	}
266		440
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	441	/ load & save, init *****************************************************/
268		442
269	static void	443	static void
270	load_state(pTHX_ Coro__State c)	444	load_perl (pTHX_ Coro__State c)
271	{	445	{
272	PL_dowarn = c->dowarn;	446	perl_slots *slot = c->slot;
273	PL_in_eval = c->in_eval;	447	c->slot = 0;
274		448
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;	449	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		450
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	451	GvSV (PL_defgv) = slot->defsv;
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	452	GvAV (PL_defgv) = slot->defav;
309	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
310		459
311	{	460	{
312	dSP;	461	dSP;
		462
313	CV *cv;	463	CV *cv;
314		464
315	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
317	{	467	{
318	AV padlist = (AV )POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
324	}	470	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	471	}
328		472
329	PUTBACK;	473	PUTBACK;
330	}	474	}
331	}	475	}
332		476
333	static void	477	static void
334	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
335	{	479	{
336	{	480	{
337	dSP;	481	dSP;
338	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	486	/*
343	* 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
344	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
345	*/	489	*/
346		490
347	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
349	for (;;)	493	for (;;)
350	{	494	{
351	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
352	{	496	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
354		498
355	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
356	{	500	{
357	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
358	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
359	{	504	{
360	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
371		509
		510	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
373	}	512	}
374	}	513	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	514	}
384		515
385	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
386	break;	517	break;
387		518
388	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
391	}	522	}
392		523
393	PUTBACK;	524	PUTBACK;
394	}	525	}
395		526
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
398	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 */
399		538
400	c->dowarn = PL_dowarn;
401	c->in_eval = PL_in_eval;
402
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;	540
407	c->op = PL_op;	541	{
408	c->curpad = PL_curpad;	542	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
409	c->comppad = PL_comppad;	543
410	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
411	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
412	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
413	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
414	c->tmps_floor = PL_tmps_floor;	548
415	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
416	c->tmps_max = PL_tmps_max;	550	# include "state.h"
417	c->markstack = PL_markstack;	551	#undef VAR
418	c->markstack_ptr = PL_markstack_ptr;	552	}
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	553	}
435		554
436	/*	555	/*
437	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
441	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
442	static void	564	static void
443	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
444	{	566	{
445	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		571
452	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		575
456	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	579	PL_tmps_max = 32;
460		580
461	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
464		584
465	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
467	#endif	587	#endif
468		588
469	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
472		592
473	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	595	PL_savestack_max = 24;
476		596
477	#if PERL_VERSION < 9	597	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	600	PL_retstack_max = 4;
481	#endif	601	#endif
482
483	UNLOCK;
484	}	602	}
		603	#endif
485		604
486	/*	605	/*
487	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
488	*/	607	*/
489	static void	608	static void
490	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
491	{	610	{
492	if (!IN_DESTRUCT)
493	{
494	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);
496
497	/* sure it is, but more important: is it correct?? :/ */
498	FREETMPS;
499
500	/POPSTACK_TO (PL_mainstack);//D//use/
501	}
502
503	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
505		613
506	while (PL_curstackinfo)	614	while (PL_curstackinfo)
507	{	615	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
509		617
510	{ /D//remove/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/D//remove/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		620
522	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	623	PL_curstackinfo = p;
525	}	624	}
526		625
527	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	627	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	629	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	630	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	631	Safefree (PL_retstack);
533	#endif	632	#endif
534	}	633	}
535		634
536	static void	635	static size_t
537	allocate_stack (Coro__State ctx, int alloc)	636	coro_rss (pTHX_ struct coro *coro)
538	{	637	{
539	coro_stack *stack;	638	size_t rss = sizeof (*coro);
540		639
541	New (0, stack, 1, coro_stack);	640	if (coro->mainstack)
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546
547	if (alloc)
548	{	641	{
549	#if HAVE_MMAP	642	perl_slots tmp_slot;
550	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	643	perl_slots *slot;
551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	644
552	if (stack->sptr != (void *)-1)	645	if (coro->flags & CF_RUNNING)
553	{	646	{
554	# if STACKGUARD	647	slot = &tmp_slot;
555	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	648
556	# endif	649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
557	}	652	}
558	else	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 *);
559	#endif	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)
560	{	713	{
561	stack->ssize = - (STACKSIZE * (long)sizeof (long));	714	SV old = svp;
562	New (0, stack->sptr, STACKSIZE, long);	715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
563	}	718	}
564	}	719	}
565	else
566	stack->sptr = 0;
567		720
568	ctx->stack = stack;	721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
569	}	722	}
570		723
571	static void	724	static void
572	deallocate_stack (Coro__State ctx)	725	coro_setup (pTHX_ struct coro *coro)
573	{
574	coro_stack *stack = ctx->stack;
575
576	ctx->stack = 0;
577
578	if (stack)
579	{
580	if (!--stack->refcnt)
581	{
582	#ifdef HAVE_MMAP
583	if (stack->ssize > 0 && stack->sptr)
584	munmap (stack->sptr, stack->ssize);
585	else
586	#endif
587	Safefree (stack->sptr);
588
589	Safefree (stack);
590	}
591	else if (ctx->gencnt == stack->gencnt)
592	--stack->usecnt;
593	}
594	}
595
596	static void
597	setup_coro (void *arg)
598	{	726	{
599	/*	727	/*
600	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
601	*/	729	*/
602	dTHX;
603	dSP;
604	Coro__State ctx = (Coro__State)arg;
605	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
606
607	coro_init_stacks (aTHX);	730	coro_init_stacks (aTHX);
608	/PL_curcop = 0;/	731
609	/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));
610	SvREFCNT_dec (GvAV (PL_defgv));	798	SvREFCNT_dec (GvAV (PL_defgv));
611	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));
612		803
613	SPAGAIN;	804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
614		809
615	if (ctx->stack)	810	coro_destroy_stacks (aTHX);
616	{
617	ctx->cursp = 0;
618
619	PUSHMARK(SP);
620	PUTBACK;
621	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
622
623	if (SvTRUE (ERRSV))
624	croak (NULL);
625	else
626	croak ("FATAL: CCTXT coroutine returned!");
627	}
628	else
629	{
630	UNOP myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PL_op = (OP *)&myop;
637
638	PUSHMARK(SP);
639	XPUSHs (sub_init);
640	/*
641	* the next line is slightly wrong, as PL_op->op_next
642	* is actually being executed so we skip the first op.
643	* that doesn't matter, though, since it is only
644	* pp_nextstate and we never return...
645	* ah yes, and I don't care anyways ;)
646	*/
647	PUTBACK;
648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;
650
651	ENTER; /* necessary e.g. for dounwind */
652	}
653	}	811	}
654		812
655	static void	813	static void
656	continue_coro (void *arg)	814	free_coro_mortal (pTHX)
657	{	815	{
658	/*	816	if (expect_true (coro_mortal))
659	* this is a _very_ stripped down perl interpreter ;)	817	{
660	*/	818	SvREFCNT_dec (coro_mortal);
661	dTHX;	819	coro_mortal = 0;
662	Coro__State ctx = (Coro__State)arg;
663
664	PL_top_env = &PL_start_env;
665
666	ctx->cursp = 0;
667	PL_op = PL_op->op_next;
668	CALLRUNOPS(aTHX);
669
670	abort ();
671	}
672
673	/* never call directly, always through the coro_state_transfer global variable */
674	static void
675	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)
676	{
677	dSTACKLEVEL;
678
679	if (prev != next)
680	{	820	}
681	/* has this coro been created yet? */	821	}
682	if (next->mainstack)	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)
683	{	836	{
684	LOCK;	837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
685	SAVE (prev, flags);
686	LOAD (next);
687	UNLOCK;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{	838	{
696	if (!prev->stack)	839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
697	allocate_stack (prev, 0);	840	SV bot, top;
698	else if (prev->cursp != stacklevel	841	AV av = newAV (); / return values */
699	&& 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)
700	{	881	{
701	prev->gencnt = ++prev->stack->gencnt;	882	SV **cb;
702	prev->stack->usecnt = 1;
703	}
704		883
705	/* has our stack been invalidated? */	884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{	885	{
708	deallocate_stack (next);	886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
709	allocate_stack (next, 1);	887
710	coro_create (&(next->stack->cctx),	888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
711	continue_coro, (void *)next,	889	{
712	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;
713	}	916	}
714		917
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	918	if (cctx->flags & CC_TRACE_LINE)
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}
722	else if (next->tmps_ix == -2)
723	croak ("tried to transfer to running coroutine");
724	else
725	{
726	LOCK;
727	SAVE (prev, -1); /* first get rid of the old state */
728	UNLOCK;
729
730	/* create the coroutine for the first time */
731	if (flags & TRANSFER_SAVE_CCTXT)
732	{
733	if (!prev->stack)
734	allocate_stack (prev, 0);
735
736	/* the new coroutine starts with start_env again */
737	PL_top_env = &PL_start_env;
738
739	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
740	{	919	{
741	setup_coro (next);	920	dSP;
742	next->cursp = stacklevel;
743		921
744	prev->stack->refcnt++;	922	PL_runops = RUNOPS_DEFAULT;
745	prev->stack->usecnt++;	923	ENTER;
746	next->stack = prev->stack;	924	SAVETMPS;
747	next->gencnt = prev->gencnt;	925	EXTEND (SP, 3);
		926	PL_runops = RUNOPS_DEFAULT;
		927	PUSHMARK (SP);
		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;
748	}	937	}
749	else
750	{
751	assert (!next->stack);
752	allocate_stack (next, 1);
753	coro_create (&(next->stack->cctx),
754	setup_coro, (void *)next,
755	next->stack->sptr, labs (next->stack->ssize));
756	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
757	prev->cursp = stacklevel;
758	/* don't add any code here */
759	}	938	}
760	}	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)
		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	}
761	else	1182	else
		1183	load_perl (aTHX_ next);
		1184
		1185	prev__cctx = prev->cctx;
		1186
		1187	/* possibly "free" the cctx */
		1188	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1189	{
		1190	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1191	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1192
		1193	prev->cctx = 0;
		1194
		1195	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1196	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1197	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1198	if (!next->cctx)
		1199	next->cctx = cctx_get (aTHX);
		1200
		1201	cctx_put (prev__cctx);
		1202	}
		1203
		1204	++next->usecount;
		1205
		1206	if (expect_true (!next->cctx))
		1207	next->cctx = cctx_get (aTHX);
		1208
		1209	has_throw = !!next->throw;
		1210
		1211	if (expect_false (prev__cctx != next->cctx))
		1212	{
		1213	prev__cctx->top_env = PL_top_env;
		1214	PL_top_env = next->cctx->top_env;
		1215	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1216	}
		1217
		1218	free_coro_mortal (aTHX);
		1219	UNLOCK;
		1220
		1221	if (expect_false (has_throw))
		1222	{
		1223	struct coro *coro = SvSTATE (coro_current);
		1224
		1225	if (coro->throw)
762	{	1226	{
		1227	SV *exception = coro->throw;
		1228	coro->throw = 0;
		1229	sv_setsv (ERRSV, exception);
763	setup_coro (next);	1230	croak (0);
764	next->cursp = stacklevel;
765	}	1231	}
766	}	1232	}
767	}	1233	}
768
769	LOCK;
770	if (coro_mortal)
771	{
772	SvREFCNT_dec (coro_mortal);
773	coro_mortal = 0;
774	}
775	UNLOCK;
776	}	1234	}
777		1235
778	/* use this function pointer to call the above function */	1236	struct transfer_args
779	/* this is done to increase chances of the compiler not inlining the call */	1237	{
780	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	1238	struct coro prev, next;
		1239	};
781		1240
		1241	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1242	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1243
		1244	/ high level stuff ******************************************************/
		1245
782	static void	1246	static int
783	coro_state_destroy (struct coro *coro)	1247	coro_state_destroy (pTHX_ struct coro *coro)
784	{	1248	{
785	if (coro->refcnt--)	1249	if (coro->flags & CF_DESTROYED)
786	return;	1250	return 0;
		1251
		1252	coro->flags \|= CF_DESTROYED;
		1253
		1254	if (coro->flags & CF_READY)
		1255	{
		1256	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1257	/* alternative: look through all ready queues and remove the coro */
		1258	LOCK;
		1259	--coro_nready;
		1260	UNLOCK;
		1261	}
		1262	else
		1263	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
787		1264
788	if (coro->mainstack && coro->mainstack != main_mainstack)	1265	if (coro->mainstack && coro->mainstack != main_mainstack)
789	{	1266	{
790	struct coro temp;	1267	struct coro temp;
791		1268
792	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1269	if (coro->flags & CF_RUNNING)
		1270	croak ("FATAL: tried to destroy currently running coroutine");
		1271
		1272	save_perl (aTHX_ &temp);
793	LOAD (aTHX_ coro);	1273	load_perl (aTHX_ coro);
794		1274
795	destroy_stacks (aTHX);	1275	coro_destroy (aTHX_ coro);
796		1276
797	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1277	load_perl (aTHX_ &temp);
798		1278
799	coro->mainstack = 0;	1279	coro->slot = 0;
800	}	1280	}
801		1281
802	deallocate_stack (coro);	1282	cctx_destroy (coro->cctx);
803	SvREFCNT_dec (coro->args);	1283	SvREFCNT_dec (coro->args);
804	Safefree (coro);	1284
		1285	if (coro->next) coro->next->prev = coro->prev;
		1286	if (coro->prev) coro->prev->next = coro->next;
		1287	if (coro == coro_first) coro_first = coro->next;
		1288
		1289	return 1;
805	}	1290	}
806		1291
807	static int	1292	static int
808	coro_state_clear (SV sv, MAGIC mg)	1293	coro_state_free (pTHX_ SV sv, MAGIC mg)
809	{	1294	{
810	struct coro coro = (struct coro )mg->mg_ptr;	1295	struct coro coro = (struct coro )mg->mg_ptr;
811	mg->mg_ptr = 0;	1296	mg->mg_ptr = 0;
812		1297
		1298	coro->hv = 0;
		1299
		1300	if (--coro->refcnt < 0)
		1301	{
813	coro_state_destroy (coro);	1302	coro_state_destroy (aTHX_ coro);
		1303	Safefree (coro);
		1304	}
814		1305
815	return 0;	1306	return 0;
816	}	1307	}
817		1308
818	static int	1309	static int
819	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1310	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
820	{	1311	{
821	struct coro coro = (struct coro )mg->mg_ptr;	1312	struct coro coro = (struct coro )mg->mg_ptr;
822		1313
823	++coro->refcnt;	1314	++coro->refcnt;
824		1315
825	return 0;	1316	return 0;
826	}	1317	}
827		1318
828	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1319	static MGVTBL coro_state_vtbl = {
829		1320	0, 0, 0, 0,
830	static struct coro *	1321	coro_state_free,
831	SvSTATE (SV *coro)	1322	0,
832	{	1323	#ifdef MGf_DUP
833	HV *stash;	1324	coro_state_dup,
834	MAGIC *mg;	1325	#else
835		1326	# define MGf_DUP 0
836	if (SvROK (coro))	1327	#endif
837	coro = SvRV (coro);	1328	};
838
839	stash = SvSTASH (coro);
840	if (stash != coro_stash && stash != coro_state_stash)
841	{
842	/* very slow, but rare, check */
843	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
844	croak ("Coro::State object required");
845	}
846
847	mg = SvMAGIC (coro);
848	assert (mg->mg_type == PERL_MAGIC_ext);
849	return (struct coro *)mg->mg_ptr;
850	}
851		1329
852	static void	1330	static void
		1331	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1332	{
		1333	ta->prev = SvSTATE (prev_sv);
		1334	ta->next = SvSTATE (next_sv);
		1335	TRANSFER_CHECK (*ta);
		1336	}
		1337
		1338	static void
853	api_transfer (pTHX_ SV prev, SV next, int flags)	1339	api_transfer (SV prev_sv, SV next_sv)
854	{	1340	{
855	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1341	dTHX;
		1342	struct transfer_args ta;
		1343
		1344	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1345	TRANSFER (ta);
856	}	1346	}
857		1347
858	/ Coro ******************************************************************/	1348	/ Coro ******************************************************************/
859		1349
860	#define PRIO_MAX 3
861	#define PRIO_HIGH 1
862	#define PRIO_NORMAL 0
863	#define PRIO_LOW -1
864	#define PRIO_IDLE -3
865	#define PRIO_MIN -4
866
867	/* for Coro.pm */
868	static GV coro_current, coro_idle;
869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870	static int coro_nready;
871
872	static void	1350	static void
873	coro_enq (pTHX_ SV *sv)	1351	coro_enq (pTHX_ SV *coro_sv)
		1352	{
		1353	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1354	}
		1355
		1356	static SV *
		1357	coro_deq (pTHX)
874	{	1358	{
875	int prio;	1359	int prio;
876		1360
877	if (SvTYPE (sv) != SVt_PVHV)
878	croak ("Coro::ready tried to enqueue something that is not a coroutine");
879
880	prio = SvSTATE (sv)->prio;
881
882	av_push (coro_ready [prio - PRIO_MIN], sv);
883	coro_nready++;
884	}
885
886	static SV *
887	coro_deq (pTHX_ int min_prio)
888	{
889	int prio = PRIO_MAX - PRIO_MIN;
890
891	min_prio -= PRIO_MIN;
892	if (min_prio < 0)
893	min_prio = 0;
894
895	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1361	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
896	if (AvFILLp (coro_ready [prio]) >= 0)	1362	if (AvFILLp (coro_ready [prio]) >= 0)
897	{
898	coro_nready--;
899	return av_shift (coro_ready [prio]);	1363	return av_shift (coro_ready [prio]);
900	}
901		1364
902	return 0;	1365	return 0;
903	}	1366	}
904		1367
		1368	static int
		1369	api_ready (SV *coro_sv)
		1370	{
		1371	dTHX;
		1372	struct coro *coro;
		1373
		1374	if (SvROK (coro_sv))
		1375	coro_sv = SvRV (coro_sv);
		1376
		1377	coro = SvSTATE (coro_sv);
		1378
		1379	if (coro->flags & CF_READY)
		1380	return 0;
		1381
		1382	coro->flags \|= CF_READY;
		1383
		1384	LOCK;
		1385	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1386	++coro_nready;
		1387	UNLOCK;
		1388
		1389	return 1;
		1390	}
		1391
		1392	static int
		1393	api_is_ready (SV *coro_sv)
		1394	{
		1395	dTHX;
		1396	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1397	}
		1398
905	static void	1399	static void
906	api_ready (SV *coro)	1400	prepare_schedule (pTHX_ struct transfer_args *ta)
907	{	1401	{
908	dTHX;	1402	SV prev_sv, next_sv;
909		1403
910	if (SvROK (coro))	1404	for (;;)
911	coro = SvRV (coro);	1405	{
		1406	LOCK;
		1407	next_sv = coro_deq (aTHX);
		1408
		1409	/* nothing to schedule: call the idle handler */
		1410	if (expect_false (!next_sv))
		1411	{
		1412	dSP;
		1413	UNLOCK;
		1414
		1415	ENTER;
		1416	SAVETMPS;
		1417
		1418	PUSHMARK (SP);
		1419	PUTBACK;
		1420	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1421	SPAGAIN;
		1422
		1423	FREETMPS;
		1424	LEAVE;
		1425	continue;
		1426	}
		1427
		1428	ta->next = SvSTATE (next_sv);
		1429
		1430	/* cannot transfer to destroyed coros, skip and look for next */
		1431	if (expect_false (ta->next->flags & CF_DESTROYED))
		1432	{
		1433	UNLOCK;
		1434	SvREFCNT_dec (next_sv);
		1435	/* coro_nready is already taken care of by destroy */
		1436	continue;
		1437	}
		1438
		1439	--coro_nready;
		1440	UNLOCK;
		1441	break;
		1442	}
		1443
		1444	/* free this only after the transfer */
		1445	prev_sv = SvRV (coro_current);
		1446	ta->prev = SvSTATE (prev_sv);
		1447	TRANSFER_CHECK (*ta);
		1448	assert (ta->next->flags & CF_READY);
		1449	ta->next->flags &= ~CF_READY;
		1450	SvRV_set (coro_current, next_sv);
912		1451
913	LOCK;	1452	LOCK;
914	coro_enq (aTHX_ SvREFCNT_inc (coro));	1453	free_coro_mortal (aTHX);
		1454	coro_mortal = prev_sv;
915	UNLOCK;	1455	UNLOCK;
		1456	}
		1457
		1458	static void
		1459	prepare_cede (pTHX_ struct transfer_args *ta)
		1460	{
		1461	api_ready (coro_current);
		1462	prepare_schedule (aTHX_ ta);
		1463	}
		1464
		1465	static int
		1466	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1467	{
		1468	if (coro_nready)
		1469	{
		1470	SV *prev = SvRV (coro_current);
		1471	prepare_schedule (aTHX_ ta);
		1472	api_ready (prev);
		1473	return 1;
		1474	}
		1475	else
		1476	return 0;
916	}	1477	}
917		1478
918	static void	1479	static void
919	api_schedule (void)	1480	api_schedule (void)
920	{	1481	{
921	dTHX;	1482	dTHX;
		1483	struct transfer_args ta;
922		1484
923	SV prev, next;	1485	prepare_schedule (aTHX_ &ta);
924	SV *current = GvSV (coro_current);	1486	TRANSFER (ta);
		1487	}
925		1488
926	for (;;)	1489	static int
927	{	1490	api_cede (void)
928	LOCK;	1491	{
		1492	dTHX;
		1493	struct transfer_args ta;
929		1494
930	next = coro_deq (aTHX_ PRIO_MIN);	1495	prepare_cede (aTHX_ &ta);
931		1496
932	if (next)	1497	if (expect_true (ta.prev != ta.next))
933	break;
934
935	UNLOCK;
936
937	{	1498	{
938	dSP;	1499	TRANSFER (ta);
939		1500	return 1;
940	ENTER;
941	SAVETMPS;
942
943	PUSHMARK (SP);
944	PUTBACK;
945	call_sv (GvSV (coro_idle), G_DISCARD);
946
947	FREETMPS;
948	LEAVE;
949	}	1501	}
		1502	else
		1503	return 0;
		1504	}
		1505
		1506	static int
		1507	api_cede_notself (void)
		1508	{
		1509	dTHX;
		1510	struct transfer_args ta;
		1511
		1512	if (prepare_cede_notself (aTHX_ &ta))
950	}	1513	{
951		1514	TRANSFER (ta);
952	prev = SvRV (current);	1515	return 1;
953	SvRV (current) = next;	1516	}
954		1517	else
955	/* free this only after the transfer */	1518	return 0;
956	coro_mortal = prev;
957
958	UNLOCK;
959
960	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
962	}	1519	}
963		1520
964	static void	1521	static void
965	api_cede (void)	1522	api_trace (SV *coro_sv, int flags)
966	{	1523	{
967	dTHX;	1524	dTHX;
		1525	struct coro *coro = SvSTATE (coro_sv);
968		1526
969	LOCK;	1527	if (flags & CC_TRACE)
970	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1528	{
971	UNLOCK;	1529	if (!coro->cctx)
		1530	coro->cctx = cctx_new ();
		1531	else if (!(coro->cctx->flags & CC_TRACE))
		1532	croak ("cannot enable tracing on coroutine with custom stack");
972		1533
973	api_schedule ();	1534	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
974	}	1535	}
		1536	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1537	{
		1538	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
975		1539
		1540	if (coro->flags & CF_RUNNING)
		1541	PL_runops = RUNOPS_DEFAULT;
		1542	else
		1543	coro->slot->runops = RUNOPS_DEFAULT;
		1544	}
		1545	}
		1546
976	MODULE = Coro::State PACKAGE = Coro::State	1547	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977		1548
978	PROTOTYPES: DISABLE	1549	PROTOTYPES: DISABLE
979		1550
980	BOOT:	1551	BOOT:
981	{	1552	{
982	#ifdef USE_ITHREADS	1553	#ifdef USE_ITHREADS
983	MUTEX_INIT (&coro_mutex);	1554	MUTEX_INIT (&coro_mutex);
984	#endif	1555	#endif
985	BOOT_PAGESIZE;	1556	BOOT_PAGESIZE;
986		1557
		1558	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1559	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1560
		1561	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1562	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1563	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1564	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1565
		1566	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1567	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1568	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1569
987	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1570	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
988		1571
989	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1572	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
990	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1573	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
991	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1574	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
992	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
993		1576
994	main_mainstack = PL_mainstack;	1577	main_mainstack = PL_mainstack;
		1578	main_top_env = PL_top_env;
		1579
		1580	while (main_top_env->je_prev)
		1581	main_top_env = main_top_env->je_prev;
995		1582
996	coroapi.ver = CORO_API_VERSION;	1583	coroapi.ver = CORO_API_VERSION;
		1584	coroapi.rev = CORO_API_REVISION;
997	coroapi.transfer = api_transfer;	1585	coroapi.transfer = api_transfer;
998		1586
999	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1587	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1000	}	1588	}
1001		1589
1002	SV *	1590	SV *
1003	new (char *klass, ...)	1591	new (char *klass, ...)
1004	CODE:	1592	CODE:
1005	{	1593	{
1006	struct coro *coro;	1594	struct coro *coro;
		1595	MAGIC *mg;
1007	HV *hv;	1596	HV *hv;
1008	int i;	1597	int i;
1009		1598
1010	Newz (0, coro, 1, struct coro);	1599	Newz (0, coro, 1, struct coro);
1011	coro->args = newAV ();	1600	coro->args = newAV ();
		1601	coro->flags = CF_NEW;
1012		1602
		1603	if (coro_first) coro_first->prev = coro;
		1604	coro->next = coro_first;
		1605	coro_first = coro;
		1606
		1607	coro->hv = hv = newHV ();
		1608	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1609	mg->mg_flags \|= MGf_DUP;
		1610	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1611
		1612	av_extend (coro->args, items - 1);
1013	for (i = 1; i < items; i++)	1613	for (i = 1; i < items; i++)
1014	av_push (coro->args, newSVsv (ST (i)));	1614	av_push (coro->args, newSVsv (ST (i)));
1015
1016	/coro->mainstack = 0; //actual work is done inside transfer /
1017	/coro->stack = 0;/
1018
1019	hv = newHV ();
1020	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1021	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1022	}	1615	}
1023	OUTPUT:	1616	OUTPUT:
1024	RETVAL	1617	RETVAL
1025		1618
		1619	# these not obviously related functions are all rolled into the same xs
		1620	# function to increase chances that they all will call transfer with the same
		1621	# stack offset
1026	void	1622	void
1027	transfer(prev, next, flags)	1623	_set_stacklevel (...)
1028	SV *prev	1624	ALIAS:
1029	SV *next	1625	Coro::State::transfer = 1
1030	int flags	1626	Coro::schedule = 2
		1627	Coro::cede = 3
		1628	Coro::cede_notself = 4
1031	CODE:	1629	CODE:
		1630	{
		1631	struct transfer_args ta;
		1632
1032	PUTBACK;	1633	PUTBACK;
1033	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1634	switch (ix)
		1635	{
		1636	case 0:
		1637	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1638	ta.next = 0;
		1639	break;
		1640
		1641	case 1:
		1642	if (items != 2)
		1643	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1644
		1645	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1646	break;
		1647
		1648	case 2:
		1649	prepare_schedule (aTHX_ &ta);
		1650	break;
		1651
		1652	case 3:
		1653	prepare_cede (aTHX_ &ta);
		1654	break;
		1655
		1656	case 4:
		1657	if (!prepare_cede_notself (aTHX_ &ta))
		1658	XSRETURN_EMPTY;
		1659
		1660	break;
		1661	}
1034	SPAGAIN;	1662	SPAGAIN;
1035		1663
1036	int	1664	BARRIER;
1037	prio (Coro::State coro, int newprio = 0)	1665	PUTBACK;
1038	ALIAS:	1666	TRANSFER (ta);
1039	nice = 1	1667	SPAGAIN; /* might be the sp of a different coroutine now */
1040	CODE:	1668	/* be extra careful not to ever do anything after TRANSFER */
1041	{
1042	RETVAL = coro->prio;
1043
1044	if (items > 1)
1045	{
1046	if (ix)
1047	newprio += coro->prio;
1048
1049	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1050	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1051
1052	coro->prio = newprio;
1053	}
1054	}	1669	}
1055		1670
1056	void	1671	bool
1057	_clone_state_from (SV dst, SV src)	1672	_destroy (SV *coro_sv)
1058	CODE:	1673	CODE:
1059	{	1674	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1060	struct coro *coro_src = SvSTATE (src);	1675	OUTPUT:
1061		1676	RETVAL
1062	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1063
1064	++coro_src->refcnt;
1065	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1066	}
1067		1677
1068	void	1678	void
1069	_exit (code)	1679	_exit (code)
1070	int code	1680	int code
1071	PROTOTYPE: $	1681	PROTOTYPE: $
1072	CODE:	1682	CODE:
1073	_exit (code);	1683	_exit (code);
1074		1684
1075	MODULE = Coro::State PACKAGE = Coro::Cont	1685	int
		1686	cctx_stacksize (int new_stacksize = 0)
		1687	CODE:
		1688	RETVAL = coro_stacksize;
		1689	if (new_stacksize)
		1690	coro_stacksize = new_stacksize;
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	int
		1695	cctx_count ()
		1696	CODE:
		1697	RETVAL = cctx_count;
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	int
		1702	cctx_idle ()
		1703	CODE:
		1704	RETVAL = cctx_idle;
		1705	OUTPUT:
		1706	RETVAL
1076		1707
1077	void	1708	void
1078	yield (...)	1709	list ()
1079	PROTOTYPE: @	1710	PPCODE:
		1711	{
		1712	struct coro *coro;
		1713	for (coro = coro_first; coro; coro = coro->next)
		1714	if (coro->hv)
		1715	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1716	}
		1717
		1718	void
		1719	call (Coro::State coro, SV *coderef)
		1720	ALIAS:
		1721	eval = 1
		1722	CODE:
		1723	{
		1724	if (coro->mainstack)
		1725	{
		1726	struct coro temp;
		1727
		1728	if (!(coro->flags & CF_RUNNING))
		1729	{
		1730	PUTBACK;
		1731	save_perl (aTHX_ &temp);
		1732	load_perl (aTHX_ coro);
		1733	}
		1734
		1735	{
		1736	dSP;
		1737	ENTER;
		1738	SAVETMPS;
		1739	PUTBACK;
		1740	PUSHSTACK;
		1741	PUSHMARK (SP);
		1742
		1743	if (ix)
		1744	eval_sv (coderef, 0);
		1745	else
		1746	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1747
		1748	POPSTACK;
		1749	SPAGAIN;
		1750	FREETMPS;
		1751	LEAVE;
		1752	PUTBACK;
		1753	}
		1754
		1755	if (!(coro->flags & CF_RUNNING))
		1756	{
		1757	save_perl (aTHX_ coro);
		1758	load_perl (aTHX_ &temp);
		1759	SPAGAIN;
		1760	}
		1761	}
		1762	}
		1763
		1764	SV *
		1765	is_ready (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	is_ready = CF_READY
		1769	is_running = CF_RUNNING
		1770	is_new = CF_NEW
		1771	is_destroyed = CF_DESTROYED
		1772	CODE:
		1773	RETVAL = boolSV (coro->flags & ix);
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	void
		1778	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1779
		1780	SV *
		1781	has_stack (Coro::State coro)
		1782	PROTOTYPE: $
		1783	CODE:
		1784	RETVAL = boolSV (!!coro->cctx);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	int
		1789	is_traced (Coro::State coro)
		1790	PROTOTYPE: $
		1791	CODE:
		1792	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1793	OUTPUT:
		1794	RETVAL
		1795
		1796	IV
		1797	rss (Coro::State coro)
		1798	PROTOTYPE: $
		1799	ALIAS:
		1800	usecount = 1
1080	CODE:	1801	CODE:
1081	{	1802	switch (ix)
1082	SV *yieldstack;	1803	{
1083	SV *sv;	1804	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1084	AV *defav = GvAV (PL_defgv);	1805	case 1: RETVAL = coro->usecount; break;
1085	struct coro prev, next;
1086
1087	yieldstack = *hv_fetch (
1088	(HV *)SvRV (GvSV (coro_current)),
1089	"yieldstack", sizeof ("yieldstack") - 1,
1090	0	1806	}
1091	);	1807	OUTPUT:
		1808	RETVAL
1092		1809
1093	/* set up @_ -- ugly */
1094	av_clear (defav);
1095	av_fill (defav, items - 1);
1096	while (items--)
1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099	sv = av_pop ((AV *)SvRV (yieldstack));
1100	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1101	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1102	SvREFCNT_dec (sv);
1103
1104	coro_state_transfer (aTHX_ prev, next, 0);
1105	}
1106		1810
1107	MODULE = Coro::State PACKAGE = Coro	1811	MODULE = Coro::State PACKAGE = Coro
1108		1812
1109	BOOT:	1813	BOOT:
1110	{	1814	{
1111	int i;	1815	int i;
1112		1816
		1817	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1818	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1819	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1820
		1821	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1822	SvREADONLY_on (coro_current);
		1823
1113	coro_stash = gv_stashpv ("Coro", TRUE);	1824	coro_stash = gv_stashpv ("Coro", TRUE);
1114		1825
1115	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1826	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1116	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1827	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1117	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1828	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1118	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1829	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1119	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1830	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1120	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1831	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1121		1832
1122	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1123	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1124
1125	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1833	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1126	coro_ready[i] = newAV ();	1834	coro_ready[i] = newAV ();
1127		1835
1128	{	1836	{
1129	SV *sv = perl_get_sv("Coro::API", 1);	1837	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1838	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1130		1839
1131	coroapi.schedule = api_schedule;	1840	coroapi.schedule = api_schedule;
1132	coroapi.cede = api_cede;	1841	coroapi.cede = api_cede;
		1842	coroapi.cede_notself = api_cede_notself;
1133	coroapi.ready = api_ready;	1843	coroapi.ready = api_ready;
		1844	coroapi.is_ready = api_is_ready;
1134	coroapi.nready = &coro_nready;	1845	coroapi.nready = &coro_nready;
1135	coroapi.current = coro_current;	1846	coroapi.current = coro_current;
1136		1847
1137	GCoroAPI = &coroapi;	1848	GCoroAPI = &coroapi;
1138	sv_setiv (sv, (IV)&coroapi);	1849	sv_setiv (sv, (IV)&coroapi);
1139	SvREADONLY_on (sv);	1850	SvREADONLY_on (sv);
1140	}	1851	}
1141	}	1852	}
1142		1853
1143	#if !PERL_MICRO
1144
1145	void	1854	void
1146	ready (self)	1855	_set_current (SV *current)
1147	SV * self
1148	PROTOTYPE: $	1856	PROTOTYPE: $
1149	CODE:	1857	CODE:
1150	api_ready (self);	1858	SvREFCNT_dec (SvRV (coro_current));
		1859	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1151		1860
1152	#endif	1861	int
		1862	prio (Coro::State coro, int newprio = 0)
		1863	ALIAS:
		1864	nice = 1
		1865	CODE:
		1866	{
		1867	RETVAL = coro->prio;
		1868
		1869	if (items > 1)
		1870	{
		1871	if (ix)
		1872	newprio = coro->prio - newprio;
		1873
		1874	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1875	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1876
		1877	coro->prio = newprio;
		1878	}
		1879	}
		1880	OUTPUT:
		1881	RETVAL
		1882
		1883	SV *
		1884	ready (SV *self)
		1885	PROTOTYPE: $
		1886	CODE:
		1887	RETVAL = boolSV (api_ready (self));
		1888	OUTPUT:
		1889	RETVAL
1153		1890
1154	int	1891	int
1155	nready (...)	1892	nready (...)
1156	PROTOTYPE:	1893	PROTOTYPE:
1157	CODE:	1894	CODE:
1158	RETVAL = coro_nready;	1895	RETVAL = coro_nready;
1159	OUTPUT:	1896	OUTPUT:
1160	RETVAL	1897	RETVAL
1161		1898
1162	void	1899	void
1163	schedule (...)	1900	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1901	PROTOTYPE: $;$
		1902	CODE:
		1903	SvREFCNT_dec (self->throw);
		1904	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1905
		1906	void
		1907	swap_defsv (Coro::State self)
1164	PROTOTYPE:	1908	PROTOTYPE: $
		1909	ALIAS:
		1910	swap_defav = 1
		1911	CODE:
		1912	if (!self->slot)
		1913	croak ("cannot swap state with coroutine that has no saved state");
		1914	else
		1915	{
		1916	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1917	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
		1918
		1919	SV tmp = src; src = dst; *dst = tmp;
		1920	}
		1921
		1922	# for async_pool speedup
		1923	void
		1924	_pool_1 (SV *cb)
1165	CODE:	1925	CODE:
1166	api_schedule ();	1926	{
		1927	struct coro *coro = SvSTATE (coro_current);
		1928	HV hv = (HV )SvRV (coro_current);
		1929	AV *defav = GvAV (PL_defgv);
		1930	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1931	AV *invoke_av;
		1932	int i, len;
		1933
		1934	if (!invoke)
		1935	{
		1936	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1937	croak ("\3async_pool terminate\2\n");
		1938	}
		1939
		1940	SvREFCNT_dec (coro->saved_deffh);
		1941	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1942
		1943	hv_store (hv, "desc", sizeof ("desc") - 1,
		1944	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1945
		1946	invoke_av = (AV *)SvRV (invoke);
		1947	len = av_len (invoke_av);
		1948
		1949	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1950
		1951	if (len > 0)
		1952	{
		1953	av_fill (defav, len - 1);
		1954	for (i = 0; i < len; ++i)
		1955	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1956	}
		1957
		1958	SvREFCNT_dec (invoke);
		1959	}
1167		1960
1168	void	1961	void
1169	cede (...)	1962	_pool_2 (SV *cb)
1170	PROTOTYPE:
1171	CODE:	1963	CODE:
1172	api_cede ();	1964	{
		1965	struct coro *coro = SvSTATE (coro_current);
1173		1966
1174	# and these are hacks	1967	sv_setsv (cb, &PL_sv_undef);
		1968
		1969	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1970	coro->saved_deffh = 0;
		1971
		1972	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1973	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1974	{
		1975	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1976	croak ("\3async_pool terminate\2\n");
		1977	}
		1978
		1979	av_clear (GvAV (PL_defgv));
		1980	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1981	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1982
		1983	coro->prio = 0;
		1984
		1985	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1986	api_trace (coro_current, 0);
		1987
		1988	av_push (av_async_pool, newSVsv (coro_current));
		1989	}
		1990
		1991
		1992	MODULE = Coro::State PACKAGE = Coro::AIO
		1993
1175	SV *	1994	SV *
1176	_aio_get_state ()	1995	_get_state ()
1177	CODE:	1996	CODE:
1178	{	1997	{
1179	struct {	1998	struct io_state *data;
1180	int errorno;
1181	int laststype;
1182	int laststatval;
1183	Stat_t statcache;
1184	} data;
1185		1999
		2000	RETVAL = newSV (sizeof (struct io_state));
		2001	data = (struct io_state *)SvPVX (RETVAL);
		2002	SvCUR_set (RETVAL, sizeof (struct io_state));
		2003	SvPOK_only (RETVAL);
		2004
1186	data.errorno = errno;	2005	data->errorno = errno;
1187	data.laststype = PL_laststype;	2006	data->laststype = PL_laststype;
1188	data.laststatval = PL_laststatval;	2007	data->laststatval = PL_laststatval;
1189	data.statcache = PL_statcache;	2008	data->statcache = PL_statcache;
1190
1191	RETVAL = newSVpvn ((char *)&data, sizeof data);
1192	}	2009	}
1193	OUTPUT:	2010	OUTPUT:
1194	RETVAL	2011	RETVAL
1195		2012
1196	void	2013	void
1197	_aio_set_state (char *data_)	2014	_set_state (char *data_)
1198	PROTOTYPE: $	2015	PROTOTYPE: $
1199	CODE:	2016	CODE:
1200	{	2017	{
1201	struct {	2018	struct io_state data = (void )data_;
1202	int errorno;
1203	int laststype;
1204	int laststatval;
1205	Stat_t statcache;
1206	} data = (void )data_;
1207		2019
1208	errno = data->errorno;	2020	errno = data->errorno;
1209	PL_laststype = data->laststype;	2021	PL_laststype = data->laststype;
1210	PL_laststatval = data->laststatval;	2022	PL_laststatval = data->laststatval;
1211	PL_statcache = data->statcache;	2023	PL_statcache = data->statcache;
1212	}	2024	}
		2025

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing Coro/Coro/State.xs (file contents): Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs. Revision 1.225 by root, Wed Mar 12 14:13:11 2008 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.225 by root, Wed Mar 12 14:13:11 2008 UTC