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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 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 just 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 */
90	typedef struct coro_stack {	181	typedef struct coro_cctx {
91	struct coro_stack *next;	182	struct coro_cctx *next;
92		183
93	void *idle_sp;	184	/* the stack */
94	void *sptr;	185	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	186	size_t ssize;
96		187
97	/* cpu state */	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;
98	coro_context cctx;	192	coro_context cctx;
99	} coro_stack;
100		193
101	static coro_stack *main_stack;	194	#if CORO_USE_VALGRIND
		195	int valgrind_id;
		196	#endif
		197	unsigned char flags;
		198	} coro_cctx;
102		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 */
		208	typedef struct {
		209	SV *defsv;
		210	AV *defav;
		211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
		217
		218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		219
		220	/* this is a structure representing a perl-level coroutine */
103	struct coro {	221	struct coro {
104	/* optionally saved, might be zero */	222	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	223	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112		224
113	/* the c stack, if any */	225	/* process data */
114	coro_stack *stack;
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
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/ coroutine stack handling **********************************************/
		673
		674	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
		675	static int (orig_sigelem_set) (pTHX_ SV sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV old = svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
		723
536	static void	724	static void
537	setup_coro (struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
538	{	726	{
539	/*	727	/*
540	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
541	*/	729	*/
542	dTHX;	730	coro_init_stacks (aTHX);
		731
		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));
		798	SvREFCNT_dec (GvAV (PL_defgv));
		799	SvREFCNT_dec (GvSV (PL_errgv));
		800	SvREFCNT_dec (PL_defoutgv);
		801	SvREFCNT_dec (PL_rs);
		802	SvREFCNT_dec (GvSV (irsgv));
		803
		804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
		809
		810	coro_destroy_stacks (aTHX);
		811	}
		812
		813	static void
		814	free_coro_mortal (pTHX)
		815	{
		816	if (expect_true (coro_mortal))
		817	{
		818	SvREFCNT_dec (coro_mortal);
		819	coro_mortal = 0;
		820	}
		821	}
		822
		823	static int
		824	runops_trace (pTHX)
		825	{
		826	COP *oldcop = 0;
		827	int oldcxix = -2;
		828	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		829	coro_cctx *cctx = coro->cctx;
		830
		831	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		832	{
		833	PERL_ASYNC_CHECK ();
		834
		835	if (cctx->flags & CC_TRACE_ALL)
		836	{
		837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		838	{
		839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		840	SV bot, top;
		841	AV av = newAV (); / return values */
		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)
		881	{
		882	SV **cb;
		883
		884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		885	{
		886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		887
		888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		889	{
		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;
		916	}
		917
		918	if (cctx->flags & CC_TRACE_LINE)
		919	{
		920	dSP;
		921
		922	PL_runops = RUNOPS_DEFAULT;
		923	ENTER;
		924	SAVETMPS;
		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;
		937	}
		938	}
		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	{
543	dSP;	953	dSP;
544	UNOP myop;	954	LOGOP myop;
545	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
546		955
547	coro_init_stacks (aTHX);	956	PL_top_env = &PL_start_env;
548	/PL_curcop = 0;/
549	/PL_in_eval = PL_in_eval;/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		957
553	SPAGAIN;	958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
554		960
555	Zero (&myop, 1, UNOP);	961	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	962	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	963	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
558		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;
559	PL_op = (OP *)&myop;	970	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	971	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	972	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	973	}
569		974
		975	/*
		976	* this is a _very_ stripped down perl interpreter ;)
		977	*/
570	static void	978	static void
571	transfer_tail ()	979	cctx_run (void *arg)
572	{	980	{
573	if (coro_mortal)	981	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		982
		983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	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;
580	}	1052	}
581		1053
582	static void	1054	static void
583	coro_run (void *arg)	1055	cctx_destroy (coro_cctx *cctx)
584	{	1056	{
585	/*	1057	if (!cctx)
586	* this is a _very_ stripped down perl interpreter ;)	1058	return;
587	*/
588	dTHX;
589		1059
590	transfer_tail ();	1060	--cctx_count;
591		1061
592	PL_top_env = &PL_start_env;	1062	#if CORO_USE_VALGRIND
593	PL_restartop = PL_op->op_next;	1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
594	/* somebody will hit me for both perl_run and PL_restart_top */	1064	#endif
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}
599
600	static coro_stack *
601	stack_new ()
602	{
603	coro_stack *stack;
604
605	New (0, stack, 1, coro_stack);
606		1065
607	#if HAVE_MMAP	1066	#if HAVE_MMAP
		1067	if (cctx->flags & CC_MAPPED)
		1068	munmap (cctx->sptr, cctx->ssize);
		1069	else
		1070	#endif
		1071	Safefree (cctx->sptr);
608		1072
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	1073	Safefree (cctx);
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1074	}
611		1075
612	if (stack->sptr == (void *)-1)	1076	/* wether this cctx should be destructed */
613	{	1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	1078
615	_exit (EXIT_FAILURE);	1079	static coro_cctx *
		1080	cctx_get (pTHX)
		1081	{
		1082	while (expect_true (cctx_first))
616	}	1083	{
		1084	coro_cctx *cctx = cctx_first;
		1085	cctx_first = cctx->next;
		1086	--cctx_idle;
617		1087
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1088	if (expect_true (!CCTX_EXPIRED (cctx)))
		1089	return cctx;
619		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)
620	#else	1134	#else
621		1135	expect_false (PL_lex_state != LEX_NOTPARSING)
622	stack->ssize = STACKSIZE * (long)sizeof (long);	1136	#endif
623	New (0, stack->sptr, STACKSIZE, long);	1137	)
624		1138	croak ("Coro::State::transfer called while parsing, but this is not supported");
625	if (!stack->sptr)
626	{	1139	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630
631	#endif
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);
634
635	return stack;
636	}	1140	}
637		1141
638	static void	1142	/* always use the TRANSFER macro */
639	stack_free (coro_stack *stack)	1143	static void NOINLINE
640	{
641	if (!stack \|\| stack == main_stack)
642	return;
643
644	#if HAVE_MMAP
645	munmap (stack->sptr, stack->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static void
656	stack_get (struct coro *coro)
657	{
658	if (stack_first)
659	{
660	coro->stack = stack_first;
661	stack_first = stack_first->next;
662	}
663	else
664	coro->stack = stack_new ();
665	}
666
667	static void
668	stack_put (coro_stack *stack)
669	{
670	stack->next = stack_first;
671	stack_first = stack;
672	}
673
674	/* never call directly, always through the coro_state_transfer global variable */
675	static void
676	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	1144	transfer (pTHX_ struct coro prev, struct coro next)
677	{	1145	{
678	dSTACKLEVEL;	1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
679		1148
680	/* sometimes transfer is only called to set idle_sp */	1149	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	1150	if (expect_false (!next))
682	prev->stack->idle_sp = stacklevel;	1151	{
683		1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	1153	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
685
686	if (prev != next)
687	{	1154	}
688	coro_stack *prev_stack = prev->stack;	1155	else if (expect_true (prev != next))
		1156	{
		1157	coro_cctx *prev__cctx;
689		1158
690	/* possibly "free" the stack */	1159	if (expect_false (prev->flags & CF_NEW))
691	if (prev_stack->idle_sp == stacklevel)
692	{	1160	{
693	stack_put (prev_stack);	1161	/* create a new empty context */
694	prev->stack = 0;	1162	Newz (0, prev->cctx, 1, coro_cctx);
		1163	prev->flags &= ~CF_NEW;
		1164	prev->flags \|= CF_RUNNING;
695	}	1165	}
696		1166
697	if (next->mainstack)	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))
698	{	1176	{
699	/* coroutine already started */	1177	/* need to start coroutine */
700	SAVE (prev, flags);	1178	next->flags &= ~CF_NEW;
701	LOAD (next);	1179	/* setup coroutine call */
		1180	coro_setup (aTHX_ next);
702	}	1181	}
703	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)))
704	{	1189	{
705	/* need to start coroutine */	1190	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
706	/* first get rid of the old state */	1191	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
707	SAVE (prev, -1);	1192
708	/* setup coroutine call */	1193	prev->cctx = 0;
709	setup_coro (next);	1194
710	/* need to change stack from main_stack to real one */	1195	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
711	next->stack = 0;	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);
712	}	1202	}
713		1203
714	if (!next->stack)	1204	++next->usecount;
715	stack_get (next);
716		1205
717	if (prev_stack != next->stack)	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;
718	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1215	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
719	}	1216	}
720		1217
721	transfer_tail ();	1218	free_coro_mortal (aTHX);
722	}	1219	UNLOCK;
723		1220
724	/* use this function pointer to call the above function */	1221	if (expect_false (has_throw))
725	/* this is done to increase chances of the compiler not inlining the call */	1222	{
726	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	1223	struct coro *coro = SvSTATE (coro_current);
727		1224
		1225	if (coro->throw)
		1226	{
		1227	SV *exception = coro->throw;
		1228	coro->throw = 0;
		1229	sv_setsv (ERRSV, exception);
		1230	croak (0);
		1231	}
		1232	}
		1233	}
		1234	}
		1235
		1236	struct transfer_args
		1237	{
		1238	struct coro prev, next;
		1239	};
		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
728	static void	1246	static int
729	coro_state_destroy (struct coro *coro)	1247	coro_state_destroy (pTHX_ struct coro *coro)
730	{	1248	{
731	if (coro->refcnt--)	1249	if (coro->flags & CF_DESTROYED)
732	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 */
733		1264
734	if (coro->mainstack && coro->mainstack != main_mainstack)	1265	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	1266	{
736	struct coro temp;	1267	struct coro temp;
737		1268
738	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);
739	LOAD (aTHX_ coro);	1273	load_perl (aTHX_ coro);
740		1274
741	destroy_stacks (aTHX);	1275	coro_destroy (aTHX_ coro);
742		1276
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1277	load_perl (aTHX_ &temp);
744		1278
745	coro->mainstack = 0;	1279	coro->slot = 0;
746	}	1280	}
747		1281
748	stack_free (coro->stack);	1282	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	1283	SvREFCNT_dec (coro->args);
750	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;
751	}	1290	}
752		1291
753	static int	1292	static int
754	coro_state_clear (SV sv, MAGIC mg)	1293	coro_state_free (pTHX_ SV sv, MAGIC mg)
755	{	1294	{
756	struct coro coro = (struct coro )mg->mg_ptr;	1295	struct coro coro = (struct coro )mg->mg_ptr;
757	mg->mg_ptr = 0;	1296	mg->mg_ptr = 0;
758		1297
		1298	coro->hv = 0;
		1299
		1300	if (--coro->refcnt < 0)
		1301	{
759	coro_state_destroy (coro);	1302	coro_state_destroy (aTHX_ coro);
		1303	Safefree (coro);
		1304	}
760		1305
761	return 0;	1306	return 0;
762	}	1307	}
763		1308
764	static int	1309	static int
765	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1310	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
766	{	1311	{
767	struct coro coro = (struct coro )mg->mg_ptr;	1312	struct coro coro = (struct coro )mg->mg_ptr;
768		1313
769	++coro->refcnt;	1314	++coro->refcnt;
770		1315
771	return 0;	1316	return 0;
772	}	1317	}
773		1318
774	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1319	static MGVTBL coro_state_vtbl = {
775		1320	0, 0, 0, 0,
776	static struct coro *	1321	coro_state_free,
777	SvSTATE (SV *coro)	1322	0,
778	{	1323	#ifdef MGf_DUP
779	HV *stash;	1324	coro_state_dup,
780	MAGIC *mg;	1325	#else
781		1326	# define MGf_DUP 0
782	if (SvROK (coro))	1327	#endif
783	coro = SvRV (coro);	1328	};
784
785	stash = SvSTASH (coro);
786	if (stash != coro_stash && stash != coro_state_stash)
787	{
788	/* very slow, but rare, check */
789	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
790	croak ("Coro::State object required");
791	}
792
793	mg = SvMAGIC (coro);
794	assert (mg->mg_type == PERL_MAGIC_ext);
795	return (struct coro *)mg->mg_ptr;
796	}
797		1329
798	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
799	api_transfer (pTHX_ SV prev, SV next, int flags)	1339	api_transfer (SV prev_sv, SV next_sv)
800	{	1340	{
801	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);
802	}	1346	}
803		1347
804	/ Coro ******************************************************************/	1348	/ Coro ******************************************************************/
805		1349
806	#define PRIO_MAX 3
807	#define PRIO_HIGH 1
808	#define PRIO_NORMAL 0
809	#define PRIO_LOW -1
810	#define PRIO_IDLE -3
811	#define PRIO_MIN -4
812
813	/* for Coro.pm */
814	static GV coro_current, coro_idle;
815	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;
817
818	static void	1350	static void
819	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)
820	{	1358	{
821	int prio;	1359	int prio;
822		1360
823	if (SvTYPE (sv) != SVt_PVHV)
824	croak ("Coro::ready tried to enqueue something that is not a coroutine");
825
826	prio = SvSTATE (sv)->prio;
827
828	av_push (coro_ready [prio - PRIO_MIN], sv);
829	coro_nready++;
830	}
831
832	static SV *
833	coro_deq (pTHX_ int min_prio)
834	{
835	int prio = PRIO_MAX - PRIO_MIN;
836
837	min_prio -= PRIO_MIN;
838	if (min_prio < 0)
839	min_prio = 0;
840
841	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1361	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
842	if (AvFILLp (coro_ready [prio]) >= 0)	1362	if (AvFILLp (coro_ready [prio]) >= 0)
843	{
844	coro_nready--;
845	return av_shift (coro_ready [prio]);	1363	return av_shift (coro_ready [prio]);
846	}
847		1364
848	return 0;	1365	return 0;
849	}	1366	}
850		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
851	static void	1399	static void
852	api_ready (SV *coro)	1400	prepare_schedule (pTHX_ struct transfer_args *ta)
853	{	1401	{
854	dTHX;	1402	SV prev_sv, next_sv;
855		1403
856	if (SvROK (coro))	1404	for (;;)
857	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);
858		1451
859	LOCK;	1452	LOCK;
860	coro_enq (aTHX_ SvREFCNT_inc (coro));	1453	free_coro_mortal (aTHX);
		1454	coro_mortal = prev_sv;
861	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;
862	}	1477	}
863		1478
864	static void	1479	static void
865	api_schedule (void)	1480	api_schedule (void)
866	{	1481	{
867	dTHX;	1482	dTHX;
		1483	struct transfer_args ta;
868		1484
869	SV prev, next;	1485	prepare_schedule (aTHX_ &ta);
870	SV *current = GvSV (coro_current);	1486	TRANSFER (ta);
		1487	}
871		1488
872	for (;;)	1489	static int
873	{	1490	api_cede (void)
874	LOCK;	1491	{
		1492	dTHX;
		1493	struct transfer_args ta;
875		1494
876	next = coro_deq (aTHX_ PRIO_MIN);	1495	prepare_cede (aTHX_ &ta);
877		1496
878	if (next)	1497	if (expect_true (ta.prev != ta.next))
879	break;
880
881	UNLOCK;
882
883	{	1498	{
884	dSP;	1499	TRANSFER (ta);
885		1500	return 1;
886	ENTER;
887	SAVETMPS;
888
889	PUSHMARK (SP);
890	PUTBACK;
891	call_sv (GvSV (coro_idle), G_DISCARD);
892
893	FREETMPS;
894	LEAVE;
895	}	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))
896	}	1513	{
897		1514	TRANSFER (ta);
898	prev = SvRV (current);	1515	return 1;
899	SvRV (current) = next;	1516	}
900		1517	else
901	/* free this only after the transfer */	1518	return 0;
902	coro_mortal = prev;
903
904	UNLOCK;
905
906	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
907	}	1519	}
908
909	static int coro_cede_self;
910		1520
911	static void	1521	static void
912	api_cede (void)	1522	api_trace (SV *coro_sv, int flags)
913	{	1523	{
914	dTHX;	1524	dTHX;
915	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1525	struct coro *coro = SvSTATE (coro_sv);
916		1526
917	LOCK;	1527	if (flags & CC_TRACE)
918
919	if (coro_cede_self)
920	{
921	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
922	av_unshift (runqueue, 1);
923	av_store (runqueue, 0, current);
924	coro_nready++;
925	coro_cede_self = 0;
926	}	1528	{
		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");
		1533
		1534	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1535	}
		1536	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1537	{
		1538	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1539
		1540	if (coro->flags & CF_RUNNING)
		1541	PL_runops = RUNOPS_DEFAULT;
927	else	1542	else
928	coro_enq (aTHX_ current);	1543	coro->slot->runops = RUNOPS_DEFAULT;
929		1544	}
930	UNLOCK;
931
932	api_schedule ();
933	}	1545	}
934		1546
935	MODULE = Coro::State PACKAGE = Coro::State	1547	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936		1548
937	PROTOTYPES: DISABLE	1549	PROTOTYPES: DISABLE
938		1550
939	BOOT:	1551	BOOT:
940	{	1552	{
941	#ifdef USE_ITHREADS	1553	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1554	MUTEX_INIT (&coro_mutex);
943	#endif	1555	#endif
944	BOOT_PAGESIZE;	1556	BOOT_PAGESIZE;
945		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
946	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1570	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
947		1571
948	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1572	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
949	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1573	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
950	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1574	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1575	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
951		1576
952	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;
953		1582
954	coroapi.ver = CORO_API_VERSION;	1583	coroapi.ver = CORO_API_VERSION;
		1584	coroapi.rev = CORO_API_REVISION;
955	coroapi.transfer = api_transfer;	1585	coroapi.transfer = api_transfer;
956
957	Newz (0, main_stack, 1, coro_stack);
958	main_stack->idle_sp = (void *)-1;
959		1586
960	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1587	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	}	1588	}
962		1589
963	SV *	1590	SV *
964	new (char *klass, ...)	1591	new (char *klass, ...)
965	CODE:	1592	CODE:
966	{	1593	{
967	struct coro *coro;	1594	struct coro *coro;
		1595	MAGIC *mg;
968	HV *hv;	1596	HV *hv;
969	int i;	1597	int i;
970		1598
971	Newz (0, coro, 1, struct coro);	1599	Newz (0, coro, 1, struct coro);
972	coro->args = newAV ();	1600	coro->args = newAV ();
		1601	coro->flags = CF_NEW;
973		1602
		1603	if (coro_first) coro_first->prev = coro;
		1604	coro->next = coro_first;
		1605	coro_first = coro;
		1606
974	hv = newHV ();	1607	coro->hv = hv = newHV ();
975	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1608	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1609	mg->mg_flags \|= MGf_DUP;
976	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1610	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
977		1611
978	av_push (coro->args, newSVsv (RETVAL));	1612	av_extend (coro->args, items - 1);
979	for (i = 1; i < items; i++)	1613	for (i = 1; i < items; i++)
980	av_push (coro->args, newSVsv (ST (i)));	1614	av_push (coro->args, newSVsv (ST (i)));
981
982	coro->stack = main_stack;
983	/coro->mainstack = 0; //actual work is done inside transfer /
984	/coro->stack = 0;/
985	}	1615	}
986	OUTPUT:	1616	OUTPUT:
987	RETVAL	1617	RETVAL
988		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
989	void	1622	void
990	transfer (prev, next, flags)	1623	_set_stacklevel (...)
991	SV *prev	1624	ALIAS:
992	SV *next	1625	Coro::State::transfer = 1
993	int flags	1626	Coro::schedule = 2
		1627	Coro::cede = 3
		1628	Coro::cede_notself = 4
994	CODE:	1629	CODE:
		1630	{
		1631	struct transfer_args ta;
		1632
995	PUTBACK;	1633	PUTBACK;
996	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	}
997	SPAGAIN;	1662	SPAGAIN;
998		1663
999	int	1664	BARRIER;
1000	prio (Coro::State coro, int newprio = 0)	1665	PUTBACK;
1001	ALIAS:	1666	TRANSFER (ta);
1002	nice = 1	1667	SPAGAIN; /* might be the sp of a different coroutine now */
1003	CODE:	1668	/* be extra careful not to ever do anything after TRANSFER */
1004	{
1005	RETVAL = coro->prio;
1006
1007	if (items > 1)
1008	{
1009	if (ix)
1010	newprio += coro->prio;
1011
1012	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1013	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1014
1015	coro->prio = newprio;
1016	}
1017	}	1669	}
1018		1670
1019	void	1671	bool
1020	_clear_idle_sp (Coro::State self)	1672	_destroy (SV *coro_sv)
1021	CODE:	1673	CODE:
1022	self->stack->idle_sp = 0;	1674	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1023		1675	OUTPUT:
1024	void	1676	RETVAL
1025	_clone_state_from (SV dst, SV src)
1026	CODE:
1027	{
1028	struct coro *coro_src = SvSTATE (src);
1029
1030	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1031
1032	++coro_src->refcnt;
1033	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1034	}
1035		1677
1036	void	1678	void
1037	_exit (code)	1679	_exit (code)
1038	int code	1680	int code
1039	PROTOTYPE: $	1681	PROTOTYPE: $
1040	CODE:	1682	CODE:
1041	_exit (code);	1683	_exit (code);
1042		1684
1043	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
1044		1707
1045	void	1708	void
1046	yield (...)	1709	list ()
1047	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
1048	CODE:	1801	CODE:
1049	{	1802	switch (ix)
1050	SV *yieldstack;	1803	{
1051	SV *sv;	1804	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1052	AV *defav = GvAV (PL_defgv);	1805	case 1: RETVAL = coro->usecount; break;
1053	struct coro prev, next;
1054
1055	yieldstack = *hv_fetch (
1056	(HV *)SvRV (GvSV (coro_current)),
1057	"yieldstack", sizeof ("yieldstack") - 1,
1058	0	1806	}
1059	);	1807	OUTPUT:
		1808	RETVAL
1060		1809
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	sv = av_pop ((AV *)SvRV (yieldstack));
1068	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1069	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1070	SvREFCNT_dec (sv);
1071
1072	coro_state_transfer (aTHX_ prev, next, 0);
1073	}
1074		1810
1075	MODULE = Coro::State PACKAGE = Coro	1811	MODULE = Coro::State PACKAGE = Coro
1076		1812
1077	BOOT:	1813	BOOT:
1078	{	1814	{
1079	int i;	1815	int i;
1080		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
1081	coro_stash = gv_stashpv ("Coro", TRUE);	1824	coro_stash = gv_stashpv ("Coro", TRUE);
1082		1825
1083	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1826	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1084	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1827	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1085	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1828	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1086	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1829	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1087	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1830	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1088	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1831	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1089		1832
1090	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1091	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1092
1093	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1833	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1094	coro_ready[i] = newAV ();	1834	coro_ready[i] = newAV ();
1095		1835
1096	{	1836	{
1097	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 */
1098		1839
1099	coroapi.schedule = api_schedule;	1840	coroapi.schedule = api_schedule;
1100	coroapi.cede = api_cede;	1841	coroapi.cede = api_cede;
		1842	coroapi.cede_notself = api_cede_notself;
1101	coroapi.ready = api_ready;	1843	coroapi.ready = api_ready;
		1844	coroapi.is_ready = api_is_ready;
1102	coroapi.nready = &coro_nready;	1845	coroapi.nready = &coro_nready;
1103	coroapi.current = coro_current;	1846	coroapi.current = coro_current;
1104		1847
1105	GCoroAPI = &coroapi;	1848	GCoroAPI = &coroapi;
1106	sv_setiv (sv, (IV)&coroapi);	1849	sv_setiv (sv, (IV)&coroapi);
1107	SvREADONLY_on (sv);	1850	SvREADONLY_on (sv);
1108	}	1851	}
1109	}	1852	}
1110		1853
1111	void	1854	void
		1855	_set_current (SV *current)
		1856	PROTOTYPE: $
		1857	CODE:
		1858	SvREFCNT_dec (SvRV (coro_current));
		1859	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1860
		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 *
1112	ready (SV *self)	1884	ready (SV *self)
1113	PROTOTYPE: $	1885	PROTOTYPE: $
1114	CODE:	1886	CODE:
1115	api_ready (self);	1887	RETVAL = boolSV (api_ready (self));
		1888	OUTPUT:
		1889	RETVAL
1116		1890
1117	int	1891	int
1118	nready (...)	1892	nready (...)
1119	PROTOTYPE:	1893	PROTOTYPE:
1120	CODE:	1894	CODE:
1121	RETVAL = coro_nready;	1895	RETVAL = coro_nready;
1122	OUTPUT:	1896	OUTPUT:
1123	RETVAL	1897	RETVAL
1124		1898
1125	void	1899	void
1126	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)
1127	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)
1128	CODE:	1925	CODE:
1129	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	}
1130		1960
1131	void	1961	void
1132	_set_cede_self ()	1962	_pool_2 (SV *cb)
1133	CODE:	1963	CODE:
1134	coro_cede_self = 1;	1964	{
		1965	struct coro *coro = SvSTATE (coro_current);
1135		1966
1136	void	1967	sv_setsv (cb, &PL_sv_undef);
1137	cede (...)	1968
1138	PROTOTYPE:	1969	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
1139	CODE:	1970	coro->saved_deffh = 0;
1140	api_cede ();	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
1141		1991
1142	MODULE = Coro::State PACKAGE = Coro::AIO	1992	MODULE = Coro::State PACKAGE = Coro::AIO
1143		1993
1144	SV *	1994	SV *
1145	_get_state ()	1995	_get_state ()
1146	CODE:	1996	CODE:
1147	{	1997	{
1148	struct {	1998	struct io_state *data;
1149	int errorno;
1150	int laststype;
1151	int laststatval;
1152	Stat_t statcache;
1153	} data;
1154		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
1155	data.errorno = errno;	2005	data->errorno = errno;
1156	data.laststype = PL_laststype;	2006	data->laststype = PL_laststype;
1157	data.laststatval = PL_laststatval;	2007	data->laststatval = PL_laststatval;
1158	data.statcache = PL_statcache;	2008	data->statcache = PL_statcache;
1159
1160	RETVAL = newSVpvn ((char *)&data, sizeof data);
1161	}	2009	}
1162	OUTPUT:	2010	OUTPUT:
1163	RETVAL	2011	RETVAL
1164		2012
1165	void	2013	void
1166	_set_state (char *data_)	2014	_set_state (char *data_)
1167	PROTOTYPE: $	2015	PROTOTYPE: $
1168	CODE:	2016	CODE:
1169	{	2017	{
1170	struct {	2018	struct io_state data = (void )data_;
1171	int errorno;
1172	int laststype;
1173	int laststatval;
1174	Stat_t statcache;
1175	} data = (void )data_;
1176		2019
1177	errno = data->errorno;	2020	errno = data->errorno;
1178	PL_laststype = data->laststype;	2021	PL_laststype = data->laststype;
1179	PL_laststatval = data->laststatval;	2022	PL_laststatval = data->laststatval;
1180	PL_statcache = data->statcache;	2023	PL_statcache = data->statcache;
1181	}	2024	}
		2025

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Comparing Coro/Coro/State.xs (file contents): Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs. Revision 1.225 by root, Wed Mar 12 14:13:11 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs.
Revision 1.225 by root, Wed Mar 12 14:13:11 2008 UTC