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

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Comparing Coro/Coro/State.xs (file contents): Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs. Revision 1.219 by root, Tue Dec 4 19:33:45 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.219 by root, Tue Dec 4 19:33:45 2007 UTC