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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.105 by root, Mon Nov 27 02:01:33 2006 UTC vs.
Revision 1.216 by root, Wed Nov 14 10:24:14 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
		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
9	#if USE_VALGRIND	40	#if CORO_USE_VALGRIND
10	# include <valgrind/valgrind.h>	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)
11	#endif	45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
12		49
13	#define PERL_VERSION_ATLEAST(a,b,c) \	50	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \	51	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \	52	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \	53	&& (PERL_VERSION > (b) \
…		…
35	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
37	# endif	74	# endif
38	#endif	75	#endif
39		76
40	#include <stdio.h>	77	/* 5.8.7 */
41	#include <errno.h>	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
42		89
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD	91	# undef CORO_STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50
51	#ifdef HAVE_MMAP
52	# include <unistd.h>
53	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS
55	# ifdef MAP_ANON
56	# define MAP_ANONYMOUS MAP_ANON
57	# else
58	# undef HAVE_MMAP
59	# endif
60	# endif	92	#endif
61	# include <limits.h>	93
62	# ifndef PAGESIZE	94	#ifndef CORO_STACKGUARD
63	# define PAGESIZE pagesize	95	# define CORO_STACKGUARD 0
64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65	static long pagesize;
66	# else
67	# define BOOT_PAGESIZE
68	# endif	96	#endif
69	#endif
70		97
71	/* The next macro should declare a variable stacklevel that contains and approximation	98	/* prefer perl internal functions over our own? */
72	* to the current C stack pointer. Its property is that it changes with each call	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
73	* and should be unique. */	100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
		102
		103	/* The next macros try to return the current stack pointer, in an as
		104	* portable way as possible. */
74	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
75	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
76		107
77	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
78		109
79	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
80	# define attribute(x) __attribute__(x)	111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
81	#else	114	#else
82	# define attribute(x)	115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
83	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
84		122
85	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
86		124
87	#include "CoroAPI.h"	125	#include "CoroAPI.h"
88
89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90		126
91	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
92	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
93	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
94	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95	#else	131	#else
96	# define LOCK (void)0	132	# define LOCK (void)0
97	# define UNLOCK (void)0	133	# define UNLOCK (void)0
98	#endif	134	#endif
99		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;
100	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
101	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;
102	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
103	static SV *coro_mortal; /* will be freed after next transfer */	150	static SV *coro_mortal; /* will be freed after next transfer */
104		151
		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
105	/* this is a structure representing a c-level coroutine */	175	/* this is a structure representing a c-level coroutine */
106	typedef struct coro_stack {	176	typedef struct coro_cctx {
107	struct coro_stack *next;	177	struct coro_cctx *next;
108		178
109	/* the stack */	179	/* the stack */
110	void *sptr;	180	void *sptr;
111	long ssize; /* positive == mmap, otherwise malloc */	181	size_t ssize;
112		182
113	/* cpu state */	183	/* cpu state */
114	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	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 */
115	JMPENV *top_env;	186	JMPENV *top_env;
116	coro_context cctx;	187	coro_context cctx;
117		188
118	#if USE_VALGRIND	189	#if CORO_USE_VALGRIND
119	int valgrind_id;	190	int valgrind_id;
120	#endif	191	#endif
121	} coro_stack;	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 */
		203	typedef struct {
		204	SV *defsv;
		205	AV *defav;
		206	SV *errsv;
		207	SV *irsgv;
		208	#define VAR(name,type) type name;
		209	# include "state.h"
		210	#undef VAR
		211	} perl_slots;
		212
		213	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
122		214
123	/* this is a structure representing a perl-level coroutine */	215	/* this is a structure representing a perl-level coroutine */
124	struct coro {	216	struct coro {
125	/* the c coroutine allocated to this perl coroutine, if any */	217	/* the c coroutine allocated to this perl coroutine, if any */
126	coro_stack *stack;	218	coro_cctx *cctx;
127		219
128	/* data associated with this coroutine (initial args) */	220	/* process data */
129	AV *args;
130	int refcnt;
131
132	/* optionally saved, might be zero */
133	AV *defav;
134	SV *defsv;
135	SV *errsv;
136
137	/* saved global state not related to stacks */
138	U8 dowarn;
139	I32 in_eval;
140
141	/* the stacks and related info (callchain etc..) */
142	PERL_SI *curstackinfo;
143	AV *curstack;
144	AV *mainstack;	221	AV *mainstack;
145	SV **stack_sp;	222	perl_slots *slot; /* basically the saved sp */
146	OP *op;	223
147	SV **curpad;	224	AV *args; /* data associated with this coroutine (initial args) */
148	AV *comppad;	225	int refcnt; /* coroutines are refcounted, yes */
149	CV *compcv;	226	int flags; /* CF_ flags */
150	SV **stack_base;	227	HV *hv; /* the perl hash associated with this coro, if any */
151	SV **stack_max;	228
152	SV **tmps_stack;	229	/* statistics */
153	I32 tmps_floor;	230	int usecount; /* number of transfers to this coro */
154	I32 tmps_ix;
155	I32 tmps_max;
156	I32 *markstack;
157	I32 *markstack_ptr;
158	I32 *markstack_max;
159	I32 *scopestack;
160	I32 scopestack_ix;
161	I32 scopestack_max;
162	ANY *savestack;
163	I32 savestack_ix;
164	I32 savestack_max;
165	OP **retstack;
166	I32 retstack_ix;
167	I32 retstack_max;
168	PMOP *curpm;
169	COP *curcop;
170		231
171	/* coro process data */	232	/* coro process data */
172	int prio;	233	int prio;
		234	SV *throw; /* exception to be thrown */
		235
		236	/* async_pool */
		237	SV *saved_deffh;
		238
		239	/* linked list */
		240	struct coro *next, *prev;
173	};	241	};
174		242
175	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
176	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
177		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
178	static AV *	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
		293	static AV *
179	coro_clone_padlist (CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
180	{	295	{
181	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
182	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
183		298
184	newpadlist = newAV ();	299	newpadlist = newAV ();
…		…
196		311
197	return newpadlist;	312	return newpadlist;
198	}	313	}
199		314
200	static void	315	static void
201	free_padlist (AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
202	{	317	{
203	/* may be during global destruction */	318	/* may be during global destruction */
204	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
205	{	320	{
206	I32 i = AvFILLp (padlist);	321	I32 i = AvFILLp (padlist);
…		…
227	AV *padlist;	342	AV *padlist;
228	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
229		344
230	/* casting is fun. */	345	/* casting is fun. */
231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
232	free_padlist (padlist);	347	free_padlist (aTHX_ padlist);
233
234	SvREFCNT_dec (av);
235		348
236	return 0;	349	return 0;
237	}	350	}
238		351
239	#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
240		354
241	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))
242		395
243	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
244	static void	397	static void
245	get_padlist (CV *cv)	398	get_padlist (pTHX_ CV *cv)
246	{	399	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
		401	AV *av;
248		402
249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
250	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251	else	405	else
252	{	406	{
253	#if 0	407	#if CORO_PREFER_PERL_FUNCTIONS
254	/* this is probably cleaner, but also slower? */	408	/* this is probably cleaner, but also slower? */
255	CV *cp = Perl_cv_clone (cv);	409	CV *cp = Perl_cv_clone (cv);
256	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
257	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
258	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
259	#else	413	#else
260	CvPADLIST (cv) = coro_clone_padlist (cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
261	#endif	415	#endif
262	}	416	}
263	}	417	}
264		418
265	static void	419	static void
266	put_padlist (CV *cv)	420	put_padlist (pTHX_ CV *cv)
267	{	421	{
268	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
		423	AV *av;
269		424
270	if (!mg)	425	if (expect_false (!mg))
271	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
272	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274	mg->mg_virtual = &vtbl_coro;
275	mg->mg_obj = (SV *)newAV ();
276	}
277		427
278	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	428	av = (AV *)mg->mg_obj;
279	}
280		429
281	#define SB do {	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
282	#define SE } while (0)	431	av_extend (av, AvMAX (av) + 1);
283		432
284	#define LOAD(state) load_state((state));	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285	#define SAVE(state,flags) save_state((state),(flags));	434	}
286		435
287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	436	/** load & save, init *******************************************************/
288		437
289	static void	438	static void
290	load_state(Coro__State c)	439	load_perl (pTHX_ Coro__State c)
291	{	440	{
292	PL_dowarn = c->dowarn;	441	perl_slots *slot = c->slot;
293	PL_in_eval = c->in_eval;	442	c->slot = 0;
294		443
295	PL_curstackinfo = c->curstackinfo;
296	PL_curstack = c->curstack;
297	PL_mainstack = c->mainstack;	444	PL_mainstack = c->mainstack;
298	PL_stack_sp = c->stack_sp;
299	PL_op = c->op;
300	PL_curpad = c->curpad;
301	PL_comppad = c->comppad;
302	PL_compcv = c->compcv;
303	PL_stack_base = c->stack_base;
304	PL_stack_max = c->stack_max;
305	PL_tmps_stack = c->tmps_stack;
306	PL_tmps_floor = c->tmps_floor;
307	PL_tmps_ix = c->tmps_ix;
308	PL_tmps_max = c->tmps_max;
309	PL_markstack = c->markstack;
310	PL_markstack_ptr = c->markstack_ptr;
311	PL_markstack_max = c->markstack_max;
312	PL_scopestack = c->scopestack;
313	PL_scopestack_ix = c->scopestack_ix;
314	PL_scopestack_max = c->scopestack_max;
315	PL_savestack = c->savestack;
316	PL_savestack_ix = c->savestack_ix;
317	PL_savestack_max = c->savestack_max;
318	#if !PERL_VERSION_ATLEAST (5,9,0)
319	PL_retstack = c->retstack;
320	PL_retstack_ix = c->retstack_ix;
321	PL_retstack_max = c->retstack_max;
322	#endif
323	PL_curpm = c->curpm;
324	PL_curcop = c->curcop;
325		445
326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	446	GvSV (PL_defgv) = slot->defsv;
327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	447	GvAV (PL_defgv) = slot->defav;
328	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
329		454
330	{	455	{
331	dSP;	456	dSP;
		457
332	CV *cv;	458	CV *cv;
333		459
334	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
335	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
336	{	462	{
337	AV *padlist = (AV *)POPs;
338
339	if (padlist)
340	{
341	put_padlist (cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
342	CvPADLIST(cv) = padlist;	464	CvDEPTH (cv) = PTR2IV (POPs);
343	}	465	CvPADLIST (cv) = (AV *)POPs;
344
345	++CvDEPTH(cv);
346	}	466	}
347		467
348	PUTBACK;	468	PUTBACK;
349	}	469	}
350	}	470	}
351		471
352	static void	472	static void
353	save_state(Coro__State c, int flags)	473	save_perl (pTHX_ Coro__State c)
354	{	474	{
355	{	475	{
356	dSP;	476	dSP;
357	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
358	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
361	/*	481	/*
362	* 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
363	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
364	*/	484	*/
365		485
366	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
367	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
368	for (;;)	488	for (;;)
369	{	489	{
370	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
371	{	491	{
372	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
373		493
374	if (CxTYPE(cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375	{	495	{
376	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
		497
377	if (CvDEPTH(cv))	498	if (expect_true (CvDEPTH (cv)))
378	{	499	{
379	EXTEND (SP, CvDEPTH(cv)*2);	500	EXTEND (SP, 3);
380
381	while (--CvDEPTH(cv))
382	{
383	/* this tells the restore code to increment CvDEPTH */
384	PUSHs (Nullsv);
385	PUSHs ((SV *)cv);
386	}
387
388	PUSHs ((SV *)CvPADLIST(cv));	501	PUSHs ((SV *)CvPADLIST (cv));
		502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
389	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
390		504
		505	CvDEPTH (cv) = 0;
391	get_padlist (cv);	506	get_padlist (aTHX_ cv);
392	}	507	}
393	}	508	}
394	#ifdef CXt_FORMAT
395	else if (CxTYPE(cx) == CXt_FORMAT)
396	{
397	/* I never used formats, so how should I know how these are implemented? */
398	/* my bold guess is as a simple, plain sub... */
399	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400	}
401	#endif
402	}	509	}
403		510
404	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
405	break;	512	break;
406		513
407	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
408	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
409	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
410	}	517	}
411		518
412	PUTBACK;	519	PUTBACK;
413	}	520	}
414		521
415	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
416	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
417	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 */
418		533
419	c->dowarn = PL_dowarn;
420	c->in_eval = PL_in_eval;
421
422	c->curstackinfo = PL_curstackinfo;
423	c->curstack = PL_curstack;
424	c->mainstack = PL_mainstack;	534	c->mainstack = PL_mainstack;
425	c->stack_sp = PL_stack_sp;	535
426	c->op = PL_op;	536	{
427	c->curpad = PL_curpad;	537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428	c->comppad = PL_comppad;	538
429	c->compcv = PL_compcv;	539	slot->defav = GvAV (PL_defgv);
430	c->stack_base = PL_stack_base;	540	slot->defsv = DEFSV;
431	c->stack_max = PL_stack_max;	541	slot->errsv = ERRSV;
432	c->tmps_stack = PL_tmps_stack;	542	slot->irsgv = GvSV (irsgv);
433	c->tmps_floor = PL_tmps_floor;	543
434	c->tmps_ix = PL_tmps_ix;	544	#define VAR(name,type) slot->name = PL_ ## name;
435	c->tmps_max = PL_tmps_max;	545	# include "state.h"
436	c->markstack = PL_markstack;	546	#undef VAR
437	c->markstack_ptr = PL_markstack_ptr;	547	}
438	c->markstack_max = PL_markstack_max;
439	c->scopestack = PL_scopestack;
440	c->scopestack_ix = PL_scopestack_ix;
441	c->scopestack_max = PL_scopestack_max;
442	c->savestack = PL_savestack;
443	c->savestack_ix = PL_savestack_ix;
444	c->savestack_max = PL_savestack_max;
445	#if !PERL_VERSION_ATLEAST (5,9,0)
446	c->retstack = PL_retstack;
447	c->retstack_ix = PL_retstack_ix;
448	c->retstack_max = PL_retstack_max;
449	#endif
450	c->curpm = PL_curpm;
451	c->curcop = PL_curcop;
452	}	548	}
453		549
454	/*	550	/*
455	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
456	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
457	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
458	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
459	*/	555	*/
		556	#if CORO_PREFER_PERL_FUNCTIONS
		557	# define coro_init_stacks init_stacks
		558	#else
460	static void	559	static void
461	coro_init_stacks ()	560	coro_init_stacks (pTHX)
462	{	561	{
463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	562	PL_curstackinfo = new_stackinfo(32, 8);
464	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
465	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467		566
468	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
469	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471		570
472	New(50,PL_tmps_stack,96,SV*);	571	New(50,PL_tmps_stack,32,SV*);
473	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
474	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
475	PL_tmps_max = 96;	574	PL_tmps_max = 32;
476		575
477	New(54,PL_markstack,16,I32);	576	New(54,PL_markstack,16,I32);
478	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
479	PL_markstack_max = PL_markstack + 16;	578	PL_markstack_max = PL_markstack + 16;
480		579
481	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
482	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
483	#endif	582	#endif
484		583
485	New(54,PL_scopestack,16,I32);	584	New(54,PL_scopestack,8,I32);
486	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
487	PL_scopestack_max = 16;	586	PL_scopestack_max = 8;
488		587
489	New(54,PL_savestack,96,ANY);	588	New(54,PL_savestack,24,ANY);
490	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
491	PL_savestack_max = 96;	590	PL_savestack_max = 24;
492		591
493	#if !PERL_VERSION_ATLEAST (5,9,0)	592	#if !PERL_VERSION_ATLEAST (5,9,0)
494	New(54,PL_retstack,8,OP*);	593	New(54,PL_retstack,4,OP*);
495	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
496	PL_retstack_max = 8;	595	PL_retstack_max = 4;
497	#endif	596	#endif
498	}	597	}
		598	#endif
499		599
500	/*	600	/*
501	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
502	*/	602	*/
503	static void	603	static void
504	coro_destroy_stacks()	604	coro_destroy_stacks (pTHX)
505	{	605	{
506	if (!IN_DESTRUCT)
507	{
508	/* is this ugly, I ask? */
509	LEAVE_SCOPE (0);
510
511	/* sure it is, but more important: is it correct?? :/ */
512	FREETMPS;
513
514	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
515	}
516
517	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
519		608
520	while (PL_curstackinfo)	609	while (PL_curstackinfo)
521	{	610	{
522	PERL_SI *p = PL_curstackinfo->si_prev;	611	PERL_SI *p = PL_curstackinfo->si_prev;
523		612
524	{ /*D*//*remove*/
525	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */
528	}
529
530	if (!IN_DESTRUCT)	613	if (!IN_DESTRUCT)
531	{
532	dounwind (-1);/*D*//*remove*/
533	SvREFCNT_dec (PL_curstackinfo->si_stack);	614	SvREFCNT_dec (PL_curstackinfo->si_stack);
534	}
535		615
536	Safefree (PL_curstackinfo->si_cxstack);	616	Safefree (PL_curstackinfo->si_cxstack);
537	Safefree (PL_curstackinfo);	617	Safefree (PL_curstackinfo);
538	PL_curstackinfo = p;	618	PL_curstackinfo = p;
539	}	619	}
…		…
545	#if !PERL_VERSION_ATLEAST (5,9,0)	625	#if !PERL_VERSION_ATLEAST (5,9,0)
546	Safefree (PL_retstack);	626	Safefree (PL_retstack);
547	#endif	627	#endif
548	}	628	}
549		629
		630	static size_t
		631	coro_rss (pTHX_ struct coro *coro)
		632	{
		633	size_t rss = sizeof (*coro);
		634
		635	if (coro->mainstack)
		636	{
		637	perl_slots tmp_slot;
		638	perl_slots *slot;
		639
		640	if (coro->flags & CF_RUNNING)
		641	{
		642	slot = &tmp_slot;
		643
		644	#define VAR(name,type) slot->name = PL_ ## name;
		645	# include "state.h"
		646	#undef VAR
		647	}
		648	else
		649	slot = coro->slot;
		650
		651	rss += sizeof (slot->curstackinfo);
		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);
		658
		659	#if !PERL_VERSION_ATLEAST (5,9,0)
		660	rss += slot->retstack_max * sizeof (OP *);
		661	#endif
		662	}
		663
		664	return rss;
		665	}
		666
		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	*/
550	static void	681	static int
551	setup_coro (struct coro *coro)	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 == '_')
		688	{
		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	}
		692
		693	return orig_sigelem_get (aTHX_ sv, mg);
		694	}
		695	#endif
		696
		697	static void
		698	coro_setup (pTHX_ struct coro *coro)
552	{	699	{
553	/*	700	/*
554	* emulate part of the perl startup here.	701	* emulate part of the perl startup here.
555	*/	702	*/
556
557	coro_init_stacks ();	703	coro_init_stacks (aTHX);
558		704
		705	PL_runops = RUNOPS_DEFAULT;
		706	PL_curcop = &PL_compiling;
		707	PL_in_eval = EVAL_NULL;
559	PL_curcop = 0;	708	PL_comppad = 0;
560	PL_in_eval = 0;
561	PL_curpm = 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);
562		730
563	{	731	{
564	dSP;	732	dSP;
565	LOGOP myop;	733	LOGOP myop;
566		734
567	/* I have no idea why this is needed, but it is */
568	PUSHMARK (SP);
569
570	SvREFCNT_dec (GvAV (PL_defgv));
571	GvAV (PL_defgv) = coro->args; coro->args = 0;
572
573	Zero (&myop, 1, LOGOP);	735	Zero (&myop, 1, LOGOP);
574	myop.op_next = Nullop;	736	myop.op_next = Nullop;
575	myop.op_flags = OPf_WANT_VOID;	737	myop.op_flags = OPf_WANT_VOID;
576		738
		739	PUSHMARK (SP);
		740	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		741	PUTBACK;
577	PL_op = (OP *)&myop;	742	PL_op = (OP *)&myop;
578
579	PUSHMARK (SP);
580	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581	PUTBACK;
582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	743	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583	SPAGAIN;	744	SPAGAIN;
584
585	ENTER; /* necessary e.g. for dounwind */
586	}	745	}
587	}
588		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
589	static void	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));
		776	SvREFCNT_dec (GvAV (PL_defgv));
		777	SvREFCNT_dec (GvSV (PL_errgv));
		778	SvREFCNT_dec (PL_defoutgv);
		779	SvREFCNT_dec (PL_rs);
		780	SvREFCNT_dec (GvSV (irsgv));
		781
		782	SvREFCNT_dec (PL_diehook);
		783	SvREFCNT_dec (PL_warnhook);
		784
		785	SvREFCNT_dec (coro->saved_deffh);
		786	SvREFCNT_dec (coro->throw);
		787
		788	coro_destroy_stacks (aTHX);
		789	}
		790
		791	static void
590	free_coro_mortal ()	792	free_coro_mortal (pTHX)
591	{	793	{
592	if (coro_mortal)	794	if (expect_true (coro_mortal))
593	{	795	{
594	SvREFCNT_dec (coro_mortal);	796	SvREFCNT_dec (coro_mortal);
595	coro_mortal = 0;	797	coro_mortal = 0;
596	}	798	}
597	}	799	}
598		800
		801	static int
		802	runops_trace (pTHX)
		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;
		808
		809	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		810	{
		811	PERL_ASYNC_CHECK ();
		812
		813	if (cctx->flags & CC_TRACE_ALL)
		814	{
		815	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		816	{
		817	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		818	SV **bot, **top;
		819	AV *av = newAV (); /* return values */
		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)
		859	{
		860	SV **cb;
		861
		862	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		863	{
		864	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		865
		866	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		867	{
		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;
		894	}
		895
		896	if (cctx->flags & CC_TRACE_LINE)
		897	{
		898	dSP;
		899
		900	PL_runops = RUNOPS_DEFAULT;
		901	ENTER;
		902	SAVETMPS;
		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;
		915	}
		916	}
		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 */
599	static void NOINLINE	928	static void NOINLINE
600	prepare_cctx (coro_stack *cctx)	929	cctx_prepare (pTHX_ coro_cctx *cctx)
601	{	930	{
602	dSP;	931	dSP;
603	LOGOP myop;	932	LOGOP myop;
604		933
		934	PL_top_env = &PL_start_env;
		935
		936	if (cctx->flags & CC_TRACE)
		937	PL_runops = runops_trace;
		938
605	Zero (&myop, 1, LOGOP);	939	Zero (&myop, 1, LOGOP);
606	myop.op_next = PL_op;	940	myop.op_next = PL_op;
607	myop.op_flags = OPf_WANT_VOID;	941	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608
609	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610		942
611	PUSHMARK (SP);	943	PUSHMARK (SP);
		944	EXTEND (SP, 2);
		945	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
612	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	946	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
613	PUTBACK;	947	PUTBACK;
		948	PL_op = (OP *)&myop;
614	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	949	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615	SPAGAIN;	950	SPAGAIN;
616	}	951	}
617		952
		953	/*
		954	* this is a _very_ stripped down perl interpreter ;)
		955	*/
618	static void	956	static void
619	coro_run (void *arg)	957	cctx_run (void *arg)
620	{	958	{
		959	dTHX;
		960
621	/* coro_run is the alternative epilogue of transfer() */	961	/* cctx_run is the alternative tail of transfer(), so unlock here. */
622	UNLOCK;	962	UNLOCK;
623		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
624	/*	974	/*
625	* this is a _very_ stripped down perl interpreter ;)	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
626	*/	980	*/
627	PL_top_env = &PL_start_env;	981	PL_top_env = main_top_env;
628	/* inject call to cctx_init */	982	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
629	prepare_cctx ((coro_stack *)arg);
630
631	/* somebody will hit me for both perl_run and PL_restartop */
632	perl_run (PL_curinterp);
633
634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
635	abort ();
636	}	983	}
637		984
638	static coro_stack *	985	static coro_cctx *
639	stack_new ()	986	cctx_new ()
640	{	987	{
641	coro_stack *stack;	988	coro_cctx *cctx;
		989	void *stack_start;
		990	size_t stack_size;
642		991
		992	++cctx_count;
		993
643	New (0, stack, 1, coro_stack);	994	Newz (0, cctx, 1, coro_cctx);
644		995
645	#if HAVE_MMAP	996	#if HAVE_MMAP
646
647	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	997	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
648	/* mmap suppsedly does allocate-on-write for us */	998	/* mmap supposedly does allocate-on-write for us */
649	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	999	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650		1000
651	if (stack->sptr == (void *)-1)	1001	if (cctx->sptr != (void *)-1)
652	{
653	perror ("FATAL: unable to mmap stack for coroutine");
654	_exit (EXIT_FAILURE);
655	}	1002	{
656
657	# if STACKGUARD	1003	# if CORO_STACKGUARD
658	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1004	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
659	# endif	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);
660		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)
661	#else	1112	#else
662		1113	expect_false (PL_lex_state != LEX_NOTPARSING)
663	stack->ssize = STACKSIZE * (long)sizeof (long);
664	New (0, stack->sptr, STACKSIZE, long);
665
666	if (!stack->sptr)
667	{
668	perror (stderr, "FATAL: unable to malloc stack for coroutine");
669	_exit (EXIT_FAILURE);
670	}
671
672	#endif	1114	#endif
673		1115	)
674	#if USE_VALGRIND	1116	croak ("Coro::State::transfer called while parsing, but this is not supported");
675	stack->valgrind_id = VALGRIND_STACK_REGISTER (
676	STACKGUARD * PAGESIZE + (char *)stack->sptr,
677	stack->ssize + (char *)stack->sptr
678	);
679	#endif
680
681	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683	return stack;
684	}
685
686	static void
687	stack_free (coro_stack *stack)
688	{
689	if (!stack)
690	return;
691
692	#if USE_VALGRIND
693	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
694	#endif
695
696	#if HAVE_MMAP
697	munmap (stack->sptr, stack->ssize);
698	#else
699	Safefree (stack->sptr);
700	#endif
701
702	Safefree (stack);
703	}
704
705	static coro_stack *stack_first;
706	static int cctx_count, cctx_idle;
707
708	static coro_stack *
709	stack_get ()
710	{
711	coro_stack *stack;
712
713	if (stack_first)
714	{
715	--cctx_idle;
716	stack = stack_first;
717	stack_first = stack->next;
718	}
719	else
720	{
721	++cctx_count;
722	stack = stack_new ();
723	PL_op = PL_op->op_next;
724	}	1117	}
725
726	return stack;
727	}	1118	}
728		1119
729	static void	1120	/* always use the TRANSFER macro */
730	stack_put (coro_stack *stack)
731	{
732	++cctx_idle;
733	stack->next = stack_first;
734	stack_first = stack;
735	}
736
737	/* never call directly, always through the coro_state_transfer global variable */
738	static void NOINLINE	1121	static void NOINLINE
739	transfer (struct coro *prev, struct coro *next, int flags)	1122	transfer (pTHX_ struct coro *prev, struct coro *next)
740	{	1123	{
741	dSTACKLEVEL;	1124	dSTACKLEVEL;
		1125	static volatile int has_throw;
742		1126
743	/* sometimes transfer is only called to set idle_sp */	1127	/* sometimes transfer is only called to set idle_sp */
744	if (flags == TRANSFER_SET_STACKLEVEL)	1128	if (expect_false (!next))
		1129	{
745	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1130	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746	else if (prev != next)	1131	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747	{	1132	}
		1133	else if (expect_true (prev != next))
		1134	{
748	coro_stack *prev__stack;	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;
749		1147
750	LOCK;	1148	LOCK;
751		1149
752	if (next->mainstack)	1150	/* first get rid of the old state */
		1151	save_perl (aTHX_ prev);
		1152
		1153	if (expect_false (next->flags & CF_NEW))
753	{	1154	{
754	/* coroutine already started */	1155	/* need to start coroutine */
755	SAVE (prev, flags);	1156	next->flags &= ~CF_NEW;
756	LOAD (next);	1157	/* setup coroutine call */
		1158	coro_setup (aTHX_ next);
757	}	1159	}
758	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)))
759	{	1167	{
760	/* need to start coroutine */	1168	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
761	/* first get rid of the old state */	1169	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
762	SAVE (prev, -1);	1170
763	/* setup coroutine call */	1171	prev->cctx = 0;
764	setup_coro (next);	1172
765	/* need a stack */	1173	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
766	next->stack = 0;	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);
767	}	1180	}
768		1181
769	if (!prev->stack)	1182	++next->usecount;
770	/* create a new empty context */
771	Newz (0, prev->stack, 1, coro_stack);
772		1183
773	prev__stack = prev->stack;	1184	if (expect_true (!next->cctx))
		1185	next->cctx = cctx_get (aTHX);
774		1186
775	/* possibly "free" the stack */	1187	has_throw = !!next->throw;
776	if (prev__stack->idle_sp == STACKLEVEL)	1188
		1189	if (expect_false (prev__cctx != next->cctx))
777	{	1190	{
778	stack_put (prev__stack);	1191	prev__cctx->top_env = PL_top_env;
779	prev->stack = 0;	1192	PL_top_env = next->cctx->top_env;
		1193	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
780	}	1194	}
781		1195
782	if (!next->stack)	1196	free_coro_mortal (aTHX);
783	next->stack = stack_get ();	1197	UNLOCK;
784		1198
785	if (prev__stack != next->stack)	1199	if (expect_false (has_throw))
786	{	1200	{
787	prev__stack->top_env = PL_top_env;	1201	struct coro *coro = SvSTATE (coro_current);
788	PL_top_env = next->stack->top_env;	1202
789	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1203	if (coro->throw)
		1204	{
		1205	SV *exception = coro->throw;
		1206	coro->throw = 0;
		1207	sv_setsv (ERRSV, exception);
		1208	croak (0);
		1209	}
790	}	1210	}
		1211	}
		1212	}
791		1213
792	free_coro_mortal ();	1214	struct transfer_args
		1215	{
		1216	struct coro *prev, *next;
		1217	};
793		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
		1224	static int
		1225	coro_state_destroy (pTHX_ struct coro *coro)
		1226	{
		1227	if (coro->flags & CF_DESTROYED)
		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;
794	UNLOCK;	1238	UNLOCK;
795	}	1239	}
796	}	1240	else
797		1241	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
798	struct transfer_args
799	{
800	struct coro *prev, *next;
801	int flags;
802	};
803
804	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
805
806	static void
807	coro_state_destroy (struct coro *coro)
808	{
809	if (coro->refcnt--)
810	return;
811		1242
812	if (coro->mainstack && coro->mainstack != main_mainstack)	1243	if (coro->mainstack && coro->mainstack != main_mainstack)
813	{	1244	{
814	struct coro temp;	1245	struct coro temp;
815		1246
816	SAVE ((&temp), TRANSFER_SAVE_ALL);	1247	if (coro->flags & CF_RUNNING)
817	LOAD (coro);	1248	croak ("FATAL: tried to destroy currently running coroutine");
818		1249
819	coro_destroy_stacks ();	1250	save_perl (aTHX_ &temp);
		1251	load_perl (aTHX_ coro);
820		1252
821	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1253	coro_destroy (aTHX_ coro);
822		1254
		1255	load_perl (aTHX_ &temp);
		1256
823	coro->mainstack = 0;	1257	coro->slot = 0;
824	}	1258	}
825		1259
826	stack_free (coro->stack);	1260	cctx_destroy (coro->cctx);
827	SvREFCNT_dec (coro->args);	1261	SvREFCNT_dec (coro->args);
828	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;
829	}	1268	}
830		1269
831	static int	1270	static int
832	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1271	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833	{	1272	{
834	struct coro *coro = (struct coro *)mg->mg_ptr;	1273	struct coro *coro = (struct coro *)mg->mg_ptr;
835	mg->mg_ptr = 0;	1274	mg->mg_ptr = 0;
836		1275
		1276	coro->hv = 0;
		1277
		1278	if (--coro->refcnt < 0)
		1279	{
837	coro_state_destroy (coro);	1280	coro_state_destroy (aTHX_ coro);
		1281	Safefree (coro);
		1282	}
838		1283
839	return 0;	1284	return 0;
840	}	1285	}
841		1286
842	static int	1287	static int
…		…
849	return 0;	1294	return 0;
850	}	1295	}
851		1296
852	static MGVTBL coro_state_vtbl = {	1297	static MGVTBL coro_state_vtbl = {
853	0, 0, 0, 0,	1298	0, 0, 0, 0,
854	coro_state_clear,	1299	coro_state_free,
855	0,	1300	0,
856	#ifdef MGf_DUP	1301	#ifdef MGf_DUP
857	coro_state_dup,	1302	coro_state_dup,
858	#else	1303	#else
859	# define MGf_DUP 0	1304	# define MGf_DUP 0
860	#endif	1305	#endif
861	};	1306	};
862		1307
863	static struct coro *
864	SvSTATE (SV *coro)
865	{
866	HV *stash;
867	MAGIC *mg;
868
869	if (SvROK (coro))
870	coro = SvRV (coro);
871
872	stash = SvSTASH (coro);
873	if (stash != coro_stash && stash != coro_state_stash)
874	{
875	/* very slow, but rare, check */
876	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
877	croak ("Coro::State object required");
878	}
879
880	mg = SvMAGIC (coro);
881	assert (mg->mg_type == PERL_MAGIC_ext);
882	return (struct coro *)mg->mg_ptr;
883	}
884
885	static void	1308	static void
886	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1309	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
887	{	1310	{
888	ta->prev = SvSTATE (prev);	1311	ta->prev = SvSTATE (prev_sv);
889	ta->next = SvSTATE (next);	1312	ta->next = SvSTATE (next_sv);
890	ta->flags = flags;	1313	TRANSFER_CHECK (*ta);
891	}	1314	}
892		1315
893	static void	1316	static void
894	api_transfer (SV *prev, SV *next, int flags)	1317	api_transfer (SV *prev_sv, SV *next_sv)
895	{	1318	{
896	dTHX;	1319	dTHX;
897	struct transfer_args ta;	1320	struct transfer_args ta;
898		1321
899	prepare_transfer (&ta, prev, next, flags);	1322	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900	TRANSFER (ta);	1323	TRANSFER (ta);
901	}	1324	}
902		1325
903	/** Coro ********************************************************************/	1326	/** Coro ********************************************************************/
904		1327
905	#define PRIO_MAX 3
906	#define PRIO_HIGH 1
907	#define PRIO_NORMAL 0
908	#define PRIO_LOW -1
909	#define PRIO_IDLE -3
910	#define PRIO_MIN -4
911
912	/* for Coro.pm */
913	static GV *coro_current, *coro_idle;
914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915	static int coro_nready;
916
917	static void	1328	static void
918	coro_enq (SV *sv)	1329	coro_enq (pTHX_ SV *coro_sv)
919	{	1330	{
920	int prio;
921
922	if (SvTYPE (sv) != SVt_PVHV)
923	croak ("Coro::ready tried to enqueue something that is not a coroutine");
924
925	prio = SvSTATE (sv)->prio;
926
927	av_push (coro_ready [prio - PRIO_MIN], sv);	1331	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
928	coro_nready++;
929	}	1332	}
930		1333
931	static SV *	1334	static SV *
932	coro_deq (int min_prio)	1335	coro_deq (pTHX_ int min_prio)
933	{	1336	{
934	int prio = PRIO_MAX - PRIO_MIN;	1337	int prio = PRIO_MAX - PRIO_MIN;
935		1338
936	min_prio -= PRIO_MIN;	1339	min_prio -= PRIO_MIN;
937	if (min_prio < 0)	1340	if (min_prio < 0)
938	min_prio = 0;	1341	min_prio = 0;
939		1342
940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1343	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
941	if (AvFILLp (coro_ready [prio]) >= 0)	1344	if (AvFILLp (coro_ready [prio]) >= 0)
942	{
943	coro_nready--;
944	return av_shift (coro_ready [prio]);	1345	return av_shift (coro_ready [prio]);
945	}
946		1346
947	return 0;	1347	return 0;
948	}	1348	}
949		1349
950	static void	1350	static int
951	api_ready (SV *coro)	1351	api_ready (SV *coro_sv)
952	{	1352	{
953	dTHX;	1353	dTHX;
		1354	struct coro *coro;
954		1355
955	if (SvROK (coro))	1356	if (SvROK (coro_sv))
956	coro = SvRV (coro);	1357	coro_sv = SvRV (coro_sv);
		1358
		1359	coro = SvSTATE (coro_sv);
		1360
		1361	if (coro->flags & CF_READY)
		1362	return 0;
		1363
		1364	coro->flags |= CF_READY;
957		1365
958	LOCK;	1366	LOCK;
959	coro_enq (SvREFCNT_inc (coro));	1367	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1368	++coro_nready;
960	UNLOCK;	1369	UNLOCK;
961	}
962		1370
		1371	return 1;
		1372	}
		1373
963	static void	1374	static int
		1375	api_is_ready (SV *coro_sv)
		1376	{
		1377	dTHX;
		1378	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1379	}
		1380
		1381	static void
964	prepare_schedule (struct transfer_args *ta)	1382	prepare_schedule (pTHX_ struct transfer_args *ta)
965	{	1383	{
966	SV *current, *prev, *next;	1384	SV *prev_sv, *next_sv;
967
968	current = GvSV (coro_current);
969		1385
970	for (;;)	1386	for (;;)
971	{	1387	{
972	LOCK;	1388	LOCK;
973	next = coro_deq (PRIO_MIN);	1389	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1390
		1391	/* nothing to schedule: call the idle handler */
		1392	if (expect_false (!next_sv))
		1393	{
		1394	dSP;
		1395	UNLOCK;
		1396
		1397	ENTER;
		1398	SAVETMPS;
		1399
		1400	PUSHMARK (SP);
		1401	PUTBACK;
		1402	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1403
		1404	FREETMPS;
		1405	LEAVE;
		1406	continue;
		1407	}
		1408
		1409	ta->next = SvSTATE (next_sv);
		1410
		1411	/* cannot transfer to destroyed coros, skip and look for next */
		1412	if (expect_false (ta->next->flags & CF_DESTROYED))
		1413	{
		1414	UNLOCK;
		1415	SvREFCNT_dec (next_sv);
		1416	/* coro_nready is already taken care of by destroy */
		1417	continue;
		1418	}
		1419
		1420	--coro_nready;
974	UNLOCK;	1421	UNLOCK;
975
976	if (next)
977	break;	1422	break;
978
979	{
980	dSP;
981
982	ENTER;
983	SAVETMPS;
984
985	PUSHMARK (SP);
986	PUTBACK;
987	call_sv (GvSV (coro_idle), G_DISCARD);
988
989	FREETMPS;
990	LEAVE;
991	}	1423	}
992	}
993
994	prev = SvRV (current);
995	SvRV (current) = next;
996		1424
997	/* free this only after the transfer */	1425	/* free this only after the transfer */
		1426	prev_sv = SvRV (coro_current);
		1427	ta->prev = SvSTATE (prev_sv);
		1428	TRANSFER_CHECK (*ta);
		1429	assert (ta->next->flags & CF_READY);
		1430	ta->next->flags &= ~CF_READY;
		1431	SvRV_set (coro_current, next_sv);
		1432
998	LOCK;	1433	LOCK;
999	free_coro_mortal ();	1434	free_coro_mortal (aTHX);
		1435	coro_mortal = prev_sv;
1000	UNLOCK;	1436	UNLOCK;
1001	coro_mortal = prev;
1002
1003	ta->prev = SvSTATE (prev);
1004	ta->next = SvSTATE (next);
1005	ta->flags = TRANSFER_SAVE_ALL;
1006	}	1437	}
1007		1438
1008	static void	1439	static void
1009	prepare_cede (struct transfer_args *ta)	1440	prepare_cede (pTHX_ struct transfer_args *ta)
1010	{	1441	{
1011	LOCK;	1442	api_ready (coro_current);
1012	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013	UNLOCK;
1014
1015	prepare_schedule (ta);	1443	prepare_schedule (aTHX_ ta);
		1444	}
		1445
		1446	static int
		1447	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1448	{
		1449	if (coro_nready)
		1450	{
		1451	SV *prev = SvRV (coro_current);
		1452	prepare_schedule (aTHX_ ta);
		1453	api_ready (prev);
		1454	return 1;
		1455	}
		1456	else
		1457	return 0;
1016	}	1458	}
1017		1459
1018	static void	1460	static void
1019	api_schedule (void)	1461	api_schedule (void)
1020	{	1462	{
1021	dTHX;	1463	dTHX;
1022	struct transfer_args ta;	1464	struct transfer_args ta;
1023		1465
1024	prepare_schedule (&ta);	1466	prepare_schedule (aTHX_ &ta);
1025	TRANSFER (ta);	1467	TRANSFER (ta);
1026	}	1468	}
1027		1469
1028	static void	1470	static int
1029	api_cede (void)	1471	api_cede (void)
1030	{	1472	{
1031	dTHX;	1473	dTHX;
1032	struct transfer_args ta;	1474	struct transfer_args ta;
1033		1475
1034	prepare_cede (&ta);	1476	prepare_cede (aTHX_ &ta);
		1477
		1478	if (expect_true (ta.prev != ta.next))
		1479	{
1035	TRANSFER (ta);	1480	TRANSFER (ta);
		1481	return 1;
		1482	}
		1483	else
		1484	return 0;
1036	}	1485	}
1037		1486
		1487	static int
		1488	api_cede_notself (void)
		1489	{
		1490	dTHX;
		1491	struct transfer_args ta;
		1492
		1493	if (prepare_cede_notself (aTHX_ &ta))
		1494	{
		1495	TRANSFER (ta);
		1496	return 1;
		1497	}
		1498	else
		1499	return 0;
		1500	}
		1501
		1502	static void
		1503	api_trace (SV *coro_sv, int flags)
		1504	{
		1505	dTHX;
		1506	struct coro *coro = SvSTATE (coro_sv);
		1507
		1508	if (flags & CC_TRACE)
		1509	{
		1510	if (!coro->cctx)
		1511	coro->cctx = cctx_new ();
		1512	else if (!(coro->cctx->flags & CC_TRACE))
		1513	croak ("cannot enable tracing on coroutine with custom stack");
		1514
		1515	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1516	}
		1517	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1518	{
		1519	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1520
		1521	if (coro->flags & CF_RUNNING)
		1522	PL_runops = RUNOPS_DEFAULT;
		1523	else
		1524	coro->slot->runops = RUNOPS_DEFAULT;
		1525	}
		1526	}
		1527
1038	MODULE = Coro::State PACKAGE = Coro::State	1528	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039		1529
1040	PROTOTYPES: DISABLE	1530	PROTOTYPES: DISABLE
1041		1531
1042	BOOT:	1532	BOOT:
1043	{	1533	{
1044	#ifdef USE_ITHREADS	1534	#ifdef USE_ITHREADS
1045	MUTEX_INIT (&coro_mutex);	1535	MUTEX_INIT (&coro_mutex);
1046	#endif	1536	#endif
1047	BOOT_PAGESIZE;	1537	BOOT_PAGESIZE;
1048		1538
		1539	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1540	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1541	#if 0
		1542	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1543	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1544	#endif
		1545	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1546	rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1547	rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1548
1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1549	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050		1550
1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1551	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1552	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1553	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1554	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054		1555
1055	main_mainstack = PL_mainstack;	1556	main_mainstack = PL_mainstack;
		1557	main_top_env = PL_top_env;
		1558
		1559	while (main_top_env->je_prev)
		1560	main_top_env = main_top_env->je_prev;
1056		1561
1057	coroapi.ver = CORO_API_VERSION;	1562	coroapi.ver = CORO_API_VERSION;
		1563	coroapi.rev = CORO_API_REVISION;
1058	coroapi.transfer = api_transfer;	1564	coroapi.transfer = api_transfer;
1059		1565
1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1566	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1061	}	1567	}
1062		1568
1063	SV *	1569	SV *
1064	new (char *klass, ...)	1570	new (char *klass, ...)
1065	CODE:	1571	CODE:
1066	{	1572	{
1067	struct coro *coro;	1573	struct coro *coro;
		1574	MAGIC *mg;
1068	HV *hv;	1575	HV *hv;
1069	int i;	1576	int i;
1070		1577
1071	Newz (0, coro, 1, struct coro);	1578	Newz (0, coro, 1, struct coro);
1072	coro->args = newAV ();	1579	coro->args = newAV ();
		1580	coro->flags = CF_NEW;
1073		1581
		1582	if (coro_first) coro_first->prev = coro;
		1583	coro->next = coro_first;
		1584	coro_first = coro;
		1585
1074	hv = newHV ();	1586	coro->hv = hv = newHV ();
1075	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1587	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1588	mg->mg_flags |= MGf_DUP;
1076	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1589	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077		1590
		1591	av_extend (coro->args, items - 1);
1078	for (i = 1; i < items; i++)	1592	for (i = 1; i < items; i++)
1079	av_push (coro->args, newSVsv (ST (i)));	1593	av_push (coro->args, newSVsv (ST (i)));
1080
1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1082	/*coro->stack = 0;*/
1083	}	1594	}
1084	OUTPUT:	1595	OUTPUT:
1085	RETVAL	1596	RETVAL
1086		1597
		1598	# these not obviously related functions are all rolled into the same xs
		1599	# function to increase chances that they all will call transfer with the same
		1600	# stack offset
1087	void	1601	void
1088	_set_stacklevel (...)	1602	_set_stacklevel (...)
1089	ALIAS:	1603	ALIAS:
1090	Coro::State::transfer = 1	1604	Coro::State::transfer = 1
1091	Coro::schedule = 2	1605	Coro::schedule = 2
1092	Coro::cede = 3	1606	Coro::cede = 3
1093	Coro::Cont::yield = 4	1607	Coro::cede_notself = 4
1094	CODE:	1608	CODE:
1095	{	1609	{
1096	struct transfer_args ta;	1610	struct transfer_args ta;
1097		1611
1098	switch (ix)	1612	switch (ix)
1099	{	1613	{
1100	case 0:	1614	case 0:
1101	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1615	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102	ta.next = 0;	1616	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1617	break;
1105		1618
1106	case 1:	1619	case 1:
1107	if (items != 3)	1620	if (items != 2)
1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1621	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109		1622
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1623	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111	break;	1624	break;
1112		1625
1113	case 2:	1626	case 2:
1114	prepare_schedule (&ta);	1627	prepare_schedule (aTHX_ &ta);
1115	break;	1628	break;
1116		1629
1117	case 3:	1630	case 3:
1118	prepare_cede (&ta);	1631	prepare_cede (aTHX_ &ta);
1119	break;	1632	break;
1120		1633
1121	case 4:	1634	case 4:
1122	{	1635	if (!prepare_cede_notself (aTHX_ &ta))
1123	SV *yieldstack;	1636	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1637
1127	yieldstack = *hv_fetch (
1128	(HV *)SvRV (GvSV (coro_current)),
1129	"yieldstack", sizeof ("yieldstack") - 1,
1130	0
1131	);
1132
1133	/* set up @_ -- ugly */
1134	av_clear (defav);
1135	av_fill (defav, items - 1);
1136	while (items--)
1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139	sv = av_pop ((AV *)SvRV (yieldstack));
1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142	ta.flags = 0;
1143	SvREFCNT_dec (sv);
1144	}
1145	break;	1638	break;
1146
1147	}	1639	}
1148		1640
		1641	BARRIER;
		1642	PUTBACK;
1149	TRANSFER (ta);	1643	TRANSFER (ta);
		1644	SPAGAIN; /* might be the sp of a different coroutine now */
		1645	/* be extra careful not to ever do anything after TRANSFER */
1150	}	1646	}
1151		1647
1152	void	1648	bool
1153	_clone_state_from (SV *dst, SV *src)	1649	_destroy (SV *coro_sv)
1154	CODE:	1650	CODE:
1155	{	1651	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1652	OUTPUT:
1157		1653	RETVAL
1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160	++coro_src->refcnt;
1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162	}
1163		1654
1164	void	1655	void
1165	_exit (code)	1656	_exit (code)
1166	int code	1657	int code
1167	PROTOTYPE: $	1658	PROTOTYPE: $
1168	CODE:	1659	CODE:
1169	_exit (code);	1660	_exit (code);
1170		1661
		1662	int
		1663	cctx_stacksize (int new_stacksize = 0)
		1664	CODE:
		1665	RETVAL = coro_stacksize;
		1666	if (new_stacksize)
		1667	coro_stacksize = new_stacksize;
		1668	OUTPUT:
		1669	RETVAL
		1670
		1671	int
		1672	cctx_count ()
		1673	CODE:
		1674	RETVAL = cctx_count;
		1675	OUTPUT:
		1676	RETVAL
		1677
		1678	int
		1679	cctx_idle ()
		1680	CODE:
		1681	RETVAL = cctx_idle;
		1682	OUTPUT:
		1683	RETVAL
		1684
		1685	void
		1686	list ()
		1687	PPCODE:
		1688	{
		1689	struct coro *coro;
		1690	for (coro = coro_first; coro; coro = coro->next)
		1691	if (coro->hv)
		1692	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1693	}
		1694
		1695	void
		1696	call (Coro::State coro, SV *coderef)
		1697	ALIAS:
		1698	eval = 1
		1699	CODE:
		1700	{
		1701	if (coro->mainstack)
		1702	{
		1703	struct coro temp;
		1704
		1705	if (!(coro->flags & CF_RUNNING))
		1706	{
		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	}
		1736	}
		1737	}
		1738
		1739	SV *
		1740	is_ready (Coro::State coro)
		1741	PROTOTYPE: $
		1742	ALIAS:
		1743	is_ready = CF_READY
		1744	is_running = CF_RUNNING
		1745	is_new = CF_NEW
		1746	is_destroyed = CF_DESTROYED
		1747	CODE:
		1748	RETVAL = boolSV (coro->flags & ix);
		1749	OUTPUT:
		1750	RETVAL
		1751
		1752	void
		1753	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1754
		1755	SV *
		1756	has_stack (Coro::State coro)
		1757	PROTOTYPE: $
		1758	CODE:
		1759	RETVAL = boolSV (!!coro->cctx);
		1760	OUTPUT:
		1761	RETVAL
		1762
		1763	int
		1764	is_traced (Coro::State coro)
		1765	PROTOTYPE: $
		1766	CODE:
		1767	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1768	OUTPUT:
		1769	RETVAL
		1770
		1771	IV
		1772	rss (Coro::State coro)
		1773	PROTOTYPE: $
		1774	ALIAS:
		1775	usecount = 1
		1776	CODE:
		1777	switch (ix)
		1778	{
		1779	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1780	case 1: RETVAL = coro->usecount; break;
		1781	}
		1782	OUTPUT:
		1783	RETVAL
		1784
		1785
1171	MODULE = Coro::State PACKAGE = Coro	1786	MODULE = Coro::State PACKAGE = Coro
1172		1787
1173	BOOT:	1788	BOOT:
1174	{	1789	{
1175	int i;	1790	int i;
1176		1791
		1792	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1793	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1794	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1795
		1796	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1797	SvREADONLY_on (coro_current);
		1798
1177	coro_stash = gv_stashpv ("Coro", TRUE);	1799	coro_stash = gv_stashpv ("Coro", TRUE);
1178		1800
1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1801	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1802	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1803	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1804	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1805	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1806	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185		1807
1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1188
1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1808	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190	coro_ready[i] = newAV ();	1809	coro_ready[i] = newAV ();
1191		1810
1192	{	1811	{
1193	SV *sv = perl_get_sv("Coro::API", 1);	1812	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1813	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194		1814
1195	coroapi.schedule = api_schedule;	1815	coroapi.schedule = api_schedule;
1196	coroapi.cede = api_cede;	1816	coroapi.cede = api_cede;
		1817	coroapi.cede_notself = api_cede_notself;
1197	coroapi.ready = api_ready;	1818	coroapi.ready = api_ready;
		1819	coroapi.is_ready = api_is_ready;
1198	coroapi.nready = &coro_nready;	1820	coroapi.nready = &coro_nready;
1199	coroapi.current = coro_current;	1821	coroapi.current = coro_current;
1200		1822
1201	GCoroAPI = &coroapi;	1823	GCoroAPI = &coroapi;
1202	sv_setiv (sv, (IV)&coroapi);	1824	sv_setiv (sv, (IV)&coroapi);
1203	SvREADONLY_on (sv);	1825	SvREADONLY_on (sv);
1204	}	1826	}
1205	}	1827	}
		1828
		1829	void
		1830	_set_current (SV *current)
		1831	PROTOTYPE: $
		1832	CODE:
		1833	SvREFCNT_dec (SvRV (coro_current));
		1834	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1206		1835
1207	int	1836	int
1208	prio (Coro::State coro, int newprio = 0)	1837	prio (Coro::State coro, int newprio = 0)
1209	ALIAS:	1838	ALIAS:
1210	nice = 1	1839	nice = 1
…		…
1213	RETVAL = coro->prio;	1842	RETVAL = coro->prio;
1214		1843
1215	if (items > 1)	1844	if (items > 1)
1216	{	1845	{
1217	if (ix)	1846	if (ix)
1218	newprio += coro->prio;	1847	newprio = coro->prio - newprio;
1219		1848
1220	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1849	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1850	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222		1851
1223	coro->prio = newprio;	1852	coro->prio = newprio;
1224	}	1853	}
1225	}	1854	}
		1855	OUTPUT:
		1856	RETVAL
1226		1857
1227	void	1858	SV *
1228	ready (SV *self)	1859	ready (SV *self)
1229	PROTOTYPE: $	1860	PROTOTYPE: $
1230	CODE:	1861	CODE:
1231	api_ready (self);	1862	RETVAL = boolSV (api_ready (self));
		1863	OUTPUT:
		1864	RETVAL
1232		1865
1233	int	1866	int
1234	nready (...)	1867	nready (...)
1235	PROTOTYPE:	1868	PROTOTYPE:
1236	CODE:	1869	CODE:
1237	RETVAL = coro_nready;	1870	RETVAL = coro_nready;
1238	OUTPUT:	1871	OUTPUT:
1239	RETVAL	1872	RETVAL
1240		1873
		1874	void
		1875	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1876	PROTOTYPE: $;$
		1877	CODE:
		1878	SvREFCNT_dec (self->throw);
		1879	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1880
		1881	# for async_pool speedup
		1882	void
		1883	_pool_1 (SV *cb)
		1884	CODE:
		1885	{
		1886	struct coro *coro = SvSTATE (coro_current);
		1887	HV *hv = (HV *)SvRV (coro_current);
		1888	AV *defav = GvAV (PL_defgv);
		1889	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1890	AV *invoke_av;
		1891	int i, len;
		1892
		1893	if (!invoke)
		1894	croak ("\3async_pool terminate\2\n");
		1895
		1896	SvREFCNT_dec (coro->saved_deffh);
		1897	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1898
		1899	hv_store (hv, "desc", sizeof ("desc") - 1,
		1900	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1901
		1902	invoke_av = (AV *)SvRV (invoke);
		1903	len = av_len (invoke_av);
		1904
		1905	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1906
		1907	if (len > 0)
		1908	{
		1909	av_fill (defav, len - 1);
		1910	for (i = 0; i < len; ++i)
		1911	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1912	}
		1913
		1914	SvREFCNT_dec (invoke);
		1915	}
		1916
		1917	void
		1918	_pool_2 (SV *cb)
		1919	CODE:
		1920	{
		1921	struct coro *coro = SvSTATE (coro_current);
		1922
		1923	sv_setsv (cb, &PL_sv_undef);
		1924
		1925	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1926	coro->saved_deffh = 0;
		1927
		1928	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1929	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1930	croak ("\3async_pool terminate\2\n");
		1931
		1932	av_clear (GvAV (PL_defgv));
		1933	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1934	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1935
		1936	coro->prio = 0;
		1937
		1938	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1939	api_trace (coro_current, 0);
		1940
		1941	av_push (av_async_pool, newSVsv (coro_current));
		1942	}
		1943
		1944
1241	MODULE = Coro::State PACKAGE = Coro::AIO	1945	MODULE = Coro::State PACKAGE = Coro::AIO
1242		1946
1243	SV *	1947	SV *
1244	_get_state ()	1948	_get_state ()
1245	CODE:	1949	CODE:
1246	{	1950	{
1247	struct {	1951	struct io_state *data;
1248	int errorno;
1249	int laststype;
1250	int laststatval;
1251	Stat_t statcache;
1252	} data;
1253		1952
		1953	RETVAL = newSV (sizeof (struct io_state));
		1954	data = (struct io_state *)SvPVX (RETVAL);
		1955	SvCUR_set (RETVAL, sizeof (struct io_state));
		1956	SvPOK_only (RETVAL);
		1957
1254	data.errorno = errno;	1958	data->errorno = errno;
1255	data.laststype = PL_laststype;	1959	data->laststype = PL_laststype;
1256	data.laststatval = PL_laststatval;	1960	data->laststatval = PL_laststatval;
1257	data.statcache = PL_statcache;	1961	data->statcache = PL_statcache;
1258
1259	RETVAL = newSVpvn ((char *)&data, sizeof data);
1260	}	1962	}
1261	OUTPUT:	1963	OUTPUT:
1262	RETVAL	1964	RETVAL
1263		1965
1264	void	1966	void
1265	_set_state (char *data_)	1967	_set_state (char *data_)
1266	PROTOTYPE: $	1968	PROTOTYPE: $
1267	CODE:	1969	CODE:
1268	{	1970	{
1269	struct {	1971	struct io_state *data = (void *)data_;
1270	int errorno;
1271	int laststype;
1272	int laststatval;
1273	Stat_t statcache;
1274	} *data = (void *)data_;
1275		1972
1276	errno = data->errorno;	1973	errno = data->errorno;
1277	PL_laststype = data->laststype;	1974	PL_laststype = data->laststype;
1278	PL_laststatval = data->laststatval;	1975	PL_laststatval = data->laststatval;
1279	PL_statcache = data->statcache;	1976	PL_statcache = data->statcache;
1280	}	1977	}
		1978

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