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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC vs.
Revision 1.222 by root, Sun Jan 20 10:22:07 2008 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
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	12	#include <stdio.h>
41	#include <errno.h>	13	#include <errno.h>
42		14	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	15	#include <inttypes.h> /* portable stdint.h */
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		16
51	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
52	# include <unistd.h>	18	# include <unistd.h>
53	# include <sys/mman.h>	19	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
69	#else	35	#else
70	# define PAGESIZE 0	36	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
72	#endif	38	#endif
73		39
74	/* The next macro should declare a variable stacklevel that contains and approximation	40	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	41	# include <valgrind/valgrind.h>
76	* and should be unique. */	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)
		57	# ifndef PL_ppaddr
		58	# define PL_ppaddr ppaddr
		59	# endif
		60	# ifndef call_sv
		61	# define call_sv perl_call_sv
		62	# endif
		63	# ifndef get_sv
		64	# define get_sv perl_get_sv
		65	# endif
		66	# ifndef get_cv
		67	# define get_cv perl_get_cv
		68	# endif
		69	# ifndef IS_PADGV
		70	# define IS_PADGV(v) 0
		71	# endif
		72	# ifndef IS_PADCONST
		73	# define IS_PADCONST(v) 0
		74	# endif
		75	#endif
		76
		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
		89
		90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		91	# undef CORO_STACKGUARD
		92	#endif
		93
		94	#ifndef CORO_STACKGUARD
		95	# define CORO_STACKGUARD 0
		96	#endif
		97
		98	/* prefer perl internal functions over our own? */
		99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		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. */
77	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
79		107
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		109
82	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
83	# 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))
84	#else	114	#else
85	# define attribute(x)	115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
86	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
87		122
88	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
89		124
90	#include "CoroAPI.h"	125	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		126
94	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	131	#else
99	# define LOCK (void)0	132	# define LOCK (void)0
100	# define UNLOCK (void)0	133	# define UNLOCK (void)0
101	#endif	134	#endif
102		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;
103	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
104	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;
105	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	150	static volatile SV *coro_mortal; /* will be freed after next transfer */
		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	};
107		174
108	/* this is a structure representing a c-level coroutine */	175	/* this is a structure representing a c-level coroutine */
109	typedef struct coro_cctx {	176	typedef struct coro_cctx {
110	struct coro_cctx *next;	177	struct coro_cctx *next;
111		178
112	/* the stack */	179	/* the stack */
113	void *sptr;	180	void *sptr;
114	long ssize; /* positive == mmap, otherwise malloc */	181	size_t ssize;
115		182
116	/* cpu state */	183	/* cpu state */
117	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 */
118	JMPENV *top_env;	186	JMPENV *top_env;
119	coro_context cctx;	187	coro_context cctx;
120		188
121	#if USE_VALGRIND	189	#if CORO_USE_VALGRIND
122	int valgrind_id;	190	int valgrind_id;
123	#endif	191	#endif
		192	unsigned char flags;
124	} coro_cctx;	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))
125		214
126	/* this is a structure representing a perl-level coroutine */	215	/* this is a structure representing a perl-level coroutine */
127	struct coro {	216	struct coro {
128	/* the c coroutine allocated to this perl coroutine, if any */	217	/* the c coroutine allocated to this perl coroutine, if any */
129	coro_cctx *cctx;	218	coro_cctx *cctx;
130		219
131	/* data associated with this coroutine (initial args) */	220	/* process data */
132	AV *args;
133	int refcnt;
134
135	/* optionally saved, might be zero */
136	AV *defav;
137	SV *defsv;
138	SV *errsv;
139
140	/* saved global state not related to stacks */
141	U8 dowarn;
142	I32 in_eval;
143
144	/* the stacks and related info (callchain etc..) */
145	PERL_SI *curstackinfo;
146	AV *curstack;
147	AV *mainstack;	221	AV *mainstack;
148	SV **stack_sp;	222	perl_slots *slot; /* basically the saved sp */
149	OP *op;	223
150	SV **curpad;	224	AV *args; /* data associated with this coroutine (initial args) */
151	AV *comppad;	225	int refcnt; /* coroutines are refcounted, yes */
152	CV *compcv;	226	int flags; /* CF_ flags */
153	SV **stack_base;	227	HV *hv; /* the perl hash associated with this coro, if any */
154	SV **stack_max;	228
155	SV **tmps_stack;	229	/* statistics */
156	I32 tmps_floor;	230	int usecount; /* number of transfers to this coro */
157	I32 tmps_ix;
158	I32 tmps_max;
159	I32 *markstack;
160	I32 *markstack_ptr;
161	I32 *markstack_max;
162	I32 *scopestack;
163	I32 scopestack_ix;
164	I32 scopestack_max;
165	ANY *savestack;
166	I32 savestack_ix;
167	I32 savestack_max;
168	OP **retstack;
169	I32 retstack_ix;
170	I32 retstack_max;
171	PMOP *curpm;
172	COP *curcop;
173		231
174	/* coro process data */	232	/* coro process data */
175	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;
176	};	241	};
177		242
178	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
179	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
180		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
181	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 *
182	coro_clone_padlist (CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
183	{	295	{
184	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
185	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
186		298
187	newpadlist = newAV ();	299	newpadlist = newAV ();
…		…
199		311
200	return newpadlist;	312	return newpadlist;
201	}	313	}
202		314
203	static void	315	static void
204	free_padlist (AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
205	{	317	{
206	/* may be during global destruction */	318	/* may be during global destruction */
207	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
208	{	320	{
209	I32 i = AvFILLp (padlist);	321	I32 i = AvFILLp (padlist);
…		…
230	AV *padlist;	342	AV *padlist;
231	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
232		344
233	/* casting is fun. */	345	/* casting is fun. */
234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
235	free_padlist (padlist);	347	free_padlist (aTHX_ padlist);
236
237	SvREFCNT_dec (av);
238		348
239	return 0;	349	return 0;
240	}	350	}
241		351
242	#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
243		354
244	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))
245		395
246	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
247	static void	397	static void
248	get_padlist (CV *cv)	398	get_padlist (pTHX_ CV *cv)
249	{	399	{
250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
		401	AV *av;
251		402
252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
254	else	405	else
255	{	406	{
256	#if 0	407	#if CORO_PREFER_PERL_FUNCTIONS
257	/* this is probably cleaner, but also slower? */	408	/* this is probably cleaner, but also slower? */
258	CV *cp = Perl_cv_clone (cv);	409	CV *cp = Perl_cv_clone (cv);
259	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
260	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
261	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
262	#else	413	#else
263	CvPADLIST (cv) = coro_clone_padlist (cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
264	#endif	415	#endif
265	}	416	}
266	}	417	}
267		418
268	static void	419	static void
269	put_padlist (CV *cv)	420	put_padlist (pTHX_ CV *cv)
270	{	421	{
271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
		423	AV *av;
272		424
273	if (!mg)	425	if (expect_false (!mg))
274	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
275	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277	mg->mg_virtual = &vtbl_coro;
278	mg->mg_obj = (SV *)newAV ();
279	}
280		427
281	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	428	av = (AV *)mg->mg_obj;
282	}
283		429
284	#define SB do {	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
285	#define SE } while (0)	431	av_extend (av, AvMAX (av) + 1);
286		432
287	#define LOAD(state) load_state((state));	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
288	#define SAVE(state,flags) save_state((state),(flags));	434	}
289		435
290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	436	/** load & save, init *******************************************************/
291		437
292	static void	438	static void
293	load_state(Coro__State c)	439	load_perl (pTHX_ Coro__State c)
294	{	440	{
295	PL_dowarn = c->dowarn;	441	perl_slots *slot = c->slot;
296	PL_in_eval = c->in_eval;	442	c->slot = 0;
297		443
298	PL_curstackinfo = c->curstackinfo;
299	PL_curstack = c->curstack;
300	PL_mainstack = c->mainstack;	444	PL_mainstack = c->mainstack;
301	PL_stack_sp = c->stack_sp;
302	PL_op = c->op;
303	PL_curpad = c->curpad;
304	PL_comppad = c->comppad;
305	PL_compcv = c->compcv;
306	PL_stack_base = c->stack_base;
307	PL_stack_max = c->stack_max;
308	PL_tmps_stack = c->tmps_stack;
309	PL_tmps_floor = c->tmps_floor;
310	PL_tmps_ix = c->tmps_ix;
311	PL_tmps_max = c->tmps_max;
312	PL_markstack = c->markstack;
313	PL_markstack_ptr = c->markstack_ptr;
314	PL_markstack_max = c->markstack_max;
315	PL_scopestack = c->scopestack;
316	PL_scopestack_ix = c->scopestack_ix;
317	PL_scopestack_max = c->scopestack_max;
318	PL_savestack = c->savestack;
319	PL_savestack_ix = c->savestack_ix;
320	PL_savestack_max = c->savestack_max;
321	#if !PERL_VERSION_ATLEAST (5,9,0)
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	#endif
326	PL_curpm = c->curpm;
327	PL_curcop = c->curcop;
328		445
329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	446	GvSV (PL_defgv) = slot->defsv;
330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	447	GvAV (PL_defgv) = slot->defav;
331	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
332		454
333	{	455	{
334	dSP;	456	dSP;
		457
335	CV *cv;	458	CV *cv;
336		459
337	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
338	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
339	{	462	{
340	AV *padlist = (AV *)POPs;
341
342	if (padlist)
343	{
344	put_padlist (cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
345	CvPADLIST(cv) = padlist;	464	CvDEPTH (cv) = PTR2IV (POPs);
346	}	465	CvPADLIST (cv) = (AV *)POPs;
347
348	++CvDEPTH(cv);
349	}	466	}
350		467
351	PUTBACK;	468	PUTBACK;
352	}	469	}
353	}	470	}
354		471
355	static void	472	static void
356	save_state(Coro__State c, int flags)	473	save_perl (pTHX_ Coro__State c)
357	{	474	{
358	{	475	{
359	dSP;	476	dSP;
360	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
361	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
364	/*	481	/*
365	* 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
366	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
367	*/	484	*/
368		485
369	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
370	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
371	for (;;)	488	for (;;)
372	{	489	{
373	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
374	{	491	{
375	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
376		493
377	if (CxTYPE(cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
378	{	495	{
379	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
		497
380	if (CvDEPTH(cv))	498	if (expect_true (CvDEPTH (cv)))
381	{	499	{
382	EXTEND (SP, CvDEPTH(cv)*2);	500	EXTEND (SP, 3);
383
384	while (--CvDEPTH(cv))
385	{
386	/* this tells the restore code to increment CvDEPTH */
387	PUSHs (Nullsv);
388	PUSHs ((SV *)cv);
389	}
390
391	PUSHs ((SV *)CvPADLIST(cv));	501	PUSHs ((SV *)CvPADLIST (cv));
		502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
392	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
393		504
		505	CvDEPTH (cv) = 0;
394	get_padlist (cv);	506	get_padlist (aTHX_ cv);
395	}	507	}
396	}	508	}
397	#ifdef CXt_FORMAT
398	else if (CxTYPE(cx) == CXt_FORMAT)
399	{
400	/* I never used formats, so how should I know how these are implemented? */
401	/* my bold guess is as a simple, plain sub... */
402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403	}
404	#endif
405	}	509	}
406		510
407	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
408	break;	512	break;
409		513
410	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
411	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
412	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
413	}	517	}
414		518
415	PUTBACK;	519	PUTBACK;
416	}	520	}
417		521
418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
420	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 */
421		533
422	c->dowarn = PL_dowarn;
423	c->in_eval = PL_in_eval;
424
425	c->curstackinfo = PL_curstackinfo;
426	c->curstack = PL_curstack;
427	c->mainstack = PL_mainstack;	534	c->mainstack = PL_mainstack;
428	c->stack_sp = PL_stack_sp;	535
429	c->op = PL_op;	536	{
430	c->curpad = PL_curpad;	537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
431	c->comppad = PL_comppad;	538
432	c->compcv = PL_compcv;	539	slot->defav = GvAV (PL_defgv);
433	c->stack_base = PL_stack_base;	540	slot->defsv = DEFSV;
434	c->stack_max = PL_stack_max;	541	slot->errsv = ERRSV;
435	c->tmps_stack = PL_tmps_stack;	542	slot->irsgv = GvSV (irsgv);
436	c->tmps_floor = PL_tmps_floor;	543
437	c->tmps_ix = PL_tmps_ix;	544	#define VAR(name,type) slot->name = PL_ ## name;
438	c->tmps_max = PL_tmps_max;	545	# include "state.h"
439	c->markstack = PL_markstack;	546	#undef VAR
440	c->markstack_ptr = PL_markstack_ptr;	547	}
441	c->markstack_max = PL_markstack_max;
442	c->scopestack = PL_scopestack;
443	c->scopestack_ix = PL_scopestack_ix;
444	c->scopestack_max = PL_scopestack_max;
445	c->savestack = PL_savestack;
446	c->savestack_ix = PL_savestack_ix;
447	c->savestack_max = PL_savestack_max;
448	#if !PERL_VERSION_ATLEAST (5,9,0)
449	c->retstack = PL_retstack;
450	c->retstack_ix = PL_retstack_ix;
451	c->retstack_max = PL_retstack_max;
452	#endif
453	c->curpm = PL_curpm;
454	c->curcop = PL_curcop;
455	}	548	}
456		549
457	/*	550	/*
458	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
459	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
460	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
461	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
462	*/	555	*/
		556	#if CORO_PREFER_PERL_FUNCTIONS
		557	# define coro_init_stacks init_stacks
		558	#else
463	static void	559	static void
464	coro_init_stacks ()	560	coro_init_stacks (pTHX)
465	{	561	{
466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	562	PL_curstackinfo = new_stackinfo(32, 8);
467	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
468	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
470		566
471	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
472	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
473	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
474		570
475	New(50,PL_tmps_stack,96,SV*);	571	New(50,PL_tmps_stack,32,SV*);
476	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
477	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
478	PL_tmps_max = 96;	574	PL_tmps_max = 32;
479		575
480	New(54,PL_markstack,16,I32);	576	New(54,PL_markstack,16,I32);
481	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
482	PL_markstack_max = PL_markstack + 16;	578	PL_markstack_max = PL_markstack + 16;
483		579
484	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
485	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
486	#endif	582	#endif
487		583
488	New(54,PL_scopestack,16,I32);	584	New(54,PL_scopestack,8,I32);
489	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
490	PL_scopestack_max = 16;	586	PL_scopestack_max = 8;
491		587
492	New(54,PL_savestack,96,ANY);	588	New(54,PL_savestack,24,ANY);
493	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
494	PL_savestack_max = 96;	590	PL_savestack_max = 24;
495		591
496	#if !PERL_VERSION_ATLEAST (5,9,0)	592	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	593	New(54,PL_retstack,4,OP*);
498	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	595	PL_retstack_max = 4;
500	#endif	596	#endif
501	}	597	}
		598	#endif
502		599
503	/*	600	/*
504	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
505	*/	602	*/
506	static void	603	static void
507	coro_destroy_stacks ()	604	coro_destroy_stacks (pTHX)
508	{	605	{
509	if (!IN_DESTRUCT)
510	{
511	/* is this ugly, I ask? */
512	LEAVE_SCOPE (0);
513
514	/* sure it is, but more important: is it correct?? :/ */
515	FREETMPS;
516
517	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
518	}
519
520	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
521	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
522		608
523	while (PL_curstackinfo)	609	while (PL_curstackinfo)
524	{	610	{
525	PERL_SI *p = PL_curstackinfo->si_prev;	611	PERL_SI *p = PL_curstackinfo->si_prev;
526		612
527	{ /*D*//*remove*/
528	dSP;
529	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
530	PUTBACK; /* possibly superfluous */
531	}
532
533	if (!IN_DESTRUCT)	613	if (!IN_DESTRUCT)
534	{
535	dounwind (-1);/*D*//*remove*/
536	SvREFCNT_dec (PL_curstackinfo->si_stack);	614	SvREFCNT_dec (PL_curstackinfo->si_stack);
537	}
538		615
539	Safefree (PL_curstackinfo->si_cxstack);	616	Safefree (PL_curstackinfo->si_cxstack);
540	Safefree (PL_curstackinfo);	617	Safefree (PL_curstackinfo);
541	PL_curstackinfo = p;	618	PL_curstackinfo = p;
542	}	619	}
…		…
548	#if !PERL_VERSION_ATLEAST (5,9,0)	625	#if !PERL_VERSION_ATLEAST (5,9,0)
549	Safefree (PL_retstack);	626	Safefree (PL_retstack);
550	#endif	627	#endif
551	}	628	}
552		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	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		670	static int (*orig_sigelem_set) (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	const char *s = MgPV_nolen_const (mg);
		685
		686	if (*s == '_')
		687	{
		688	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		689	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		690	}
		691
		692	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		693	}
		694
		695	static int
		696	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		697	{
		698	const char *s = MgPV_nolen_const (mg);
		699
		700	if (*s == '_')
		701	{
		702	SV **svp = 0;
		703
		704	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		705	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		706
		707	if (svp)
		708	{
		709	SV *old = *svp;
		710	*svp = newSVsv (sv);
		711	SvREFCNT_dec (old);
		712	return;
		713	}
		714	}
		715
		716	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		717	}
		718
553	static void	719	static void
554	setup_coro (struct coro *coro)	720	coro_setup (pTHX_ struct coro *coro)
555	{	721	{
556	/*	722	/*
557	* emulate part of the perl startup here.	723	* emulate part of the perl startup here.
558	*/	724	*/
559
560	coro_init_stacks ();	725	coro_init_stacks (aTHX);
561		726
		727	PL_runops = RUNOPS_DEFAULT;
		728	PL_curcop = &PL_compiling;
		729	PL_in_eval = EVAL_NULL;
562	PL_curcop = 0;	730	PL_comppad = 0;
563	PL_in_eval = 0;
564	PL_curpm = 0;	731	PL_curpm = 0;
		732	PL_curpad = 0;
		733	PL_localizing = 0;
		734	PL_dirty = 0;
		735	PL_restartop = 0;
		736
		737	/* recreate the die/warn hooks */
		738	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		739	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		740
		741	GvSV (PL_defgv) = newSV (0);
		742	GvAV (PL_defgv) = coro->args; coro->args = 0;
		743	GvSV (PL_errgv) = newSV (0);
		744	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		745	PL_rs = newSVsv (GvSV (irsgv));
		746	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
565		747
566	{	748	{
567	dSP;	749	dSP;
568	LOGOP myop;	750	LOGOP myop;
569		751
570	/* I have no idea why this is needed, but it is */
571	PUSHMARK (SP);
572
573	SvREFCNT_dec (GvAV (PL_defgv));
574	GvAV (PL_defgv) = coro->args; coro->args = 0;
575
576	Zero (&myop, 1, LOGOP);	752	Zero (&myop, 1, LOGOP);
577	myop.op_next = Nullop;	753	myop.op_next = Nullop;
578	myop.op_flags = OPf_WANT_VOID;	754	myop.op_flags = OPf_WANT_VOID;
579		755
		756	PUSHMARK (SP);
		757	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		758	PUTBACK;
580	PL_op = (OP *)&myop;	759	PL_op = (OP *)&myop;
581
582	PUSHMARK (SP);
583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
584	PUTBACK;
585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	760	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
586	SPAGAIN;	761	SPAGAIN;
587
588	ENTER; /* necessary e.g. for dounwind */
589	}	762	}
		763
		764	/* this newly created coroutine might be run on an existing cctx which most
		765	* likely was suspended in set_stacklevel, called from entersub.
		766	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		767	* so we ENTER here for symmetry
		768	*/
		769	ENTER;
590	}	770	}
591		771
592	static void	772	static void
		773	coro_destroy (pTHX_ struct coro *coro)
		774	{
		775	if (!IN_DESTRUCT)
		776	{
		777	/* restore all saved variables and stuff */
		778	LEAVE_SCOPE (0);
		779	assert (PL_tmps_floor == -1);
		780
		781	/* free all temporaries */
		782	FREETMPS;
		783	assert (PL_tmps_ix == -1);
		784
		785	/* unwind all extra stacks */
		786	POPSTACK_TO (PL_mainstack);
		787
		788	/* unwind main stack */
		789	dounwind (-1);
		790	}
		791
		792	SvREFCNT_dec (GvSV (PL_defgv));
		793	SvREFCNT_dec (GvAV (PL_defgv));
		794	SvREFCNT_dec (GvSV (PL_errgv));
		795	SvREFCNT_dec (PL_defoutgv);
		796	SvREFCNT_dec (PL_rs);
		797	SvREFCNT_dec (GvSV (irsgv));
		798
		799	SvREFCNT_dec (PL_diehook);
		800	SvREFCNT_dec (PL_warnhook);
		801
		802	SvREFCNT_dec (coro->saved_deffh);
		803	SvREFCNT_dec (coro->throw);
		804
		805	coro_destroy_stacks (aTHX);
		806	}
		807
		808	static void
593	free_coro_mortal ()	809	free_coro_mortal (pTHX)
594	{	810	{
595	if (coro_mortal)	811	if (expect_true (coro_mortal))
596	{	812	{
597	SvREFCNT_dec (coro_mortal);	813	SvREFCNT_dec (coro_mortal);
598	coro_mortal = 0;	814	coro_mortal = 0;
599	}	815	}
600	}	816	}
601		817
		818	static int
		819	runops_trace (pTHX)
		820	{
		821	COP *oldcop = 0;
		822	int oldcxix = -2;
		823	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		824	coro_cctx *cctx = coro->cctx;
		825
		826	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		827	{
		828	PERL_ASYNC_CHECK ();
		829
		830	if (cctx->flags & CC_TRACE_ALL)
		831	{
		832	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		833	{
		834	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		835	SV **bot, **top;
		836	AV *av = newAV (); /* return values */
		837	SV **cb;
		838	dSP;
		839
		840	GV *gv = CvGV (cx->blk_sub.cv);
		841	SV *fullname = sv_2mortal (newSV (0));
		842	if (isGV (gv))
		843	gv_efullname3 (fullname, gv, 0);
		844
		845	bot = PL_stack_base + cx->blk_oldsp + 1;
		846	top = cx->blk_gimme == G_ARRAY ? SP + 1
		847	: cx->blk_gimme == G_SCALAR ? bot + 1
		848	: bot;
		849
		850	av_extend (av, top - bot);
		851	while (bot < top)
		852	av_push (av, SvREFCNT_inc (*bot++));
		853
		854	PL_runops = RUNOPS_DEFAULT;
		855	ENTER;
		856	SAVETMPS;
		857	EXTEND (SP, 3);
		858	PUSHMARK (SP);
		859	PUSHs (&PL_sv_no);
		860	PUSHs (fullname);
		861	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		862	PUTBACK;
		863	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		864	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		865	SPAGAIN;
		866	FREETMPS;
		867	LEAVE;
		868	PL_runops = runops_trace;
		869	}
		870
		871	if (oldcop != PL_curcop)
		872	{
		873	oldcop = PL_curcop;
		874
		875	if (PL_curcop != &PL_compiling)
		876	{
		877	SV **cb;
		878
		879	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		880	{
		881	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		882
		883	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		884	{
		885	runops_proc_t old_runops = PL_runops;
		886	dSP;
		887	GV *gv = CvGV (cx->blk_sub.cv);
		888	SV *fullname = sv_2mortal (newSV (0));
		889
		890	if (isGV (gv))
		891	gv_efullname3 (fullname, gv, 0);
		892
		893	PL_runops = RUNOPS_DEFAULT;
		894	ENTER;
		895	SAVETMPS;
		896	EXTEND (SP, 3);
		897	PUSHMARK (SP);
		898	PUSHs (&PL_sv_yes);
		899	PUSHs (fullname);
		900	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		901	PUTBACK;
		902	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		903	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		904	SPAGAIN;
		905	FREETMPS;
		906	LEAVE;
		907	PL_runops = runops_trace;
		908	}
		909
		910	oldcxix = cxstack_ix;
		911	}
		912
		913	if (cctx->flags & CC_TRACE_LINE)
		914	{
		915	dSP;
		916
		917	PL_runops = RUNOPS_DEFAULT;
		918	ENTER;
		919	SAVETMPS;
		920	EXTEND (SP, 3);
		921	PL_runops = RUNOPS_DEFAULT;
		922	PUSHMARK (SP);
		923	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		924	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		925	PUTBACK;
		926	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		927	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		928	SPAGAIN;
		929	FREETMPS;
		930	LEAVE;
		931	PL_runops = runops_trace;
		932	}
		933	}
		934	}
		935	}
		936	}
		937
		938	TAINT_NOT;
		939	return 0;
		940	}
		941
		942	/* inject a fake call to Coro::State::_cctx_init into the execution */
		943	/* _cctx_init should be careful, as it could be called at almost any time */
		944	/* during execution of a perl program */
602	static void NOINLINE	945	static void NOINLINE
603	prepare_cctx (coro_cctx *cctx)	946	cctx_prepare (pTHX_ coro_cctx *cctx)
604	{	947	{
605	dSP;	948	dSP;
606	LOGOP myop;	949	LOGOP myop;
607		950
		951	PL_top_env = &PL_start_env;
		952
		953	if (cctx->flags & CC_TRACE)
		954	PL_runops = runops_trace;
		955
608	Zero (&myop, 1, LOGOP);	956	Zero (&myop, 1, LOGOP);
609	myop.op_next = PL_op;	957	myop.op_next = PL_op;
610	myop.op_flags = OPf_WANT_VOID;	958	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
611
612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613		959
614	PUSHMARK (SP);	960	PUSHMARK (SP);
		961	EXTEND (SP, 2);
		962	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	963	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
616	PUTBACK;	964	PUTBACK;
		965	PL_op = (OP *)&myop;
617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	966	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
618	SPAGAIN;	967	SPAGAIN;
619	}	968	}
620		969
		970	/*
		971	* this is a _very_ stripped down perl interpreter ;)
		972	*/
621	static void	973	static void
622	coro_run (void *arg)	974	cctx_run (void *arg)
623	{	975	{
		976	dTHX;
		977
624	/* coro_run is the alternative epilogue of transfer() */	978	/* cctx_run is the alternative tail of transfer(), so unlock here. */
625	UNLOCK;	979	UNLOCK;
626		980
		981	/* we now skip the entersub that lead to transfer() */
		982	PL_op = PL_op->op_next;
		983
		984	/* inject a fake subroutine call to cctx_init */
		985	cctx_prepare (aTHX_ (coro_cctx *)arg);
		986
		987	/* somebody or something will hit me for both perl_run and PL_restartop */
		988	PL_restartop = PL_op;
		989	perl_run (PL_curinterp);
		990
627	/*	991	/*
628	* this is a _very_ stripped down perl interpreter ;)	992	* If perl-run returns we assume exit() was being called or the coro
		993	* fell off the end, which seems to be the only valid (non-bug)
		994	* reason for perl_run to return. We try to exit by jumping to the
		995	* bootstrap-time "top" top_env, as we cannot restore the "main"
		996	* coroutine as Coro has no such concept
629	*/	997	*/
630	PL_top_env = &PL_start_env;	998	PL_top_env = main_top_env;
631	/* inject call to cctx_init */	999	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
632	prepare_cctx ((coro_cctx *)arg);
633
634	/* somebody will hit me for both perl_run and PL_restartop */
635	perl_run (PL_curinterp);
636
637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
638	abort ();
639	}	1000	}
640		1001
641	static coro_cctx *	1002	static coro_cctx *
642	cctx_new ()	1003	cctx_new ()
643	{	1004	{
644	coro_cctx *cctx;	1005	coro_cctx *cctx;
		1006	void *stack_start;
		1007	size_t stack_size;
645		1008
		1009	++cctx_count;
		1010
646	New (0, cctx, 1, coro_cctx);	1011	Newz (0, cctx, 1, coro_cctx);
647		1012
648	#if HAVE_MMAP	1013	#if HAVE_MMAP
649
650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1014	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
651	/* mmap suppsedly does allocate-on-write for us */	1015	/* mmap supposedly does allocate-on-write for us */
652	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1016	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
653		1017
654	if (cctx->sptr == (void *)-1)	1018	if (cctx->sptr != (void *)-1)
655	{
656	perror ("FATAL: unable to mmap stack for coroutine");
657	_exit (EXIT_FAILURE);
658	}	1019	{
659
660	# if STACKGUARD	1020	# if CORO_STACKGUARD
661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1021	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
662	# endif	1022	# endif
		1023	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1024	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1025	cctx->flags |= CC_MAPPED;
		1026	}
		1027	else
		1028	#endif
		1029	{
		1030	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1031	New (0, cctx->sptr, coro_stacksize, long);
663		1032
664	#else
665
666	cctx->ssize = STACKSIZE * (long)sizeof (long);
667	New (0, cctx->sptr, STACKSIZE, long);
668
669	if (!cctx->sptr)	1033	if (!cctx->sptr)
670	{	1034	{
671	perror ("FATAL: unable to malloc stack for coroutine");	1035	perror ("FATAL: unable to allocate stack for coroutine");
672	_exit (EXIT_FAILURE);	1036	_exit (EXIT_FAILURE);
673	}	1037	}
674		1038
675	#endif	1039	stack_start = cctx->sptr;
		1040	stack_size = cctx->ssize;
		1041	}
676		1042
677	#if USE_VALGRIND	1043	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
678	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1044	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
679	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
680	cctx->ssize + (char *)cctx->sptr
681	);
682	#endif
683
684	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
685		1045
686	return cctx;	1046	return cctx;
687	}	1047	}
688		1048
689	static void	1049	static void
690	cctx_free (coro_cctx *cctx)	1050	cctx_destroy (coro_cctx *cctx)
691	{	1051	{
692	if (!cctx)	1052	if (!cctx)
693	return;	1053	return;
694		1054
		1055	--cctx_count;
		1056
695	#if USE_VALGRIND	1057	#if CORO_USE_VALGRIND
696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1058	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697	#endif	1059	#endif
698		1060
699	#if HAVE_MMAP	1061	#if HAVE_MMAP
		1062	if (cctx->flags & CC_MAPPED)
700	munmap (cctx->sptr, cctx->ssize);	1063	munmap (cctx->sptr, cctx->ssize);
701	#else	1064	else
		1065	#endif
702	Safefree (cctx->sptr);	1066	Safefree (cctx->sptr);
703	#endif
704		1067
705	Safefree (cctx);	1068	Safefree (cctx);
706	}	1069	}
707		1070
708	static coro_cctx *cctx_first;	1071	/* wether this cctx should be destructed */
709	static int cctx_count, cctx_idle;	1072	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
710		1073
711	static coro_cctx *	1074	static coro_cctx *
712	cctx_get ()	1075	cctx_get (pTHX)
713	{	1076	{
714	coro_cctx *cctx;	1077	while (expect_true (cctx_first))
715
716	if (cctx_first)
717	{	1078	{
		1079	coro_cctx *cctx = cctx_first;
		1080	cctx_first = cctx->next;
718	--cctx_idle;	1081	--cctx_idle;
719	cctx = cctx_first;	1082
720	cctx_first = cctx->next;	1083	if (expect_true (!CCTX_EXPIRED (cctx)))
721	}	1084	return cctx;
722	else	1085
723	{	1086	cctx_destroy (cctx);
724	++cctx_count;
725	cctx = cctx_new ();
726	PL_op = PL_op->op_next;
727	}	1087	}
728		1088
729	return cctx;	1089	return cctx_new ();
730	}	1090	}
731		1091
732	static void	1092	static void
733	cctx_put (coro_cctx *cctx)	1093	cctx_put (coro_cctx *cctx)
734	{	1094	{
		1095	/* free another cctx if overlimit */
		1096	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1097	{
		1098	coro_cctx *first = cctx_first;
		1099	cctx_first = first->next;
		1100	--cctx_idle;
		1101
		1102	cctx_destroy (first);
		1103	}
		1104
735	++cctx_idle;	1105	++cctx_idle;
736	cctx->next = cctx_first;	1106	cctx->next = cctx_first;
737	cctx_first = cctx;	1107	cctx_first = cctx;
738	}	1108	}
739		1109
740	/* never call directly, always through the coro_state_transfer global variable */	1110	/** coroutine switching *****************************************************/
		1111
		1112	static void
		1113	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1114	{
		1115	if (expect_true (prev != next))
		1116	{
		1117	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1118	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1119
		1120	if (expect_false (next->flags & CF_RUNNING))
		1121	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1122
		1123	if (expect_false (next->flags & CF_DESTROYED))
		1124	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1125
		1126	if (
		1127	#if PERL_VERSION_ATLEAST (5,9,0)
		1128	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
		1129	#else
		1130	expect_false (PL_lex_state != LEX_NOTPARSING)
		1131	#endif
		1132	)
		1133	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1134	}
		1135	}
		1136
		1137	/* always use the TRANSFER macro */
741	static void NOINLINE	1138	static void NOINLINE
742	transfer (struct coro *prev, struct coro *next, int flags)	1139	transfer (pTHX_ struct coro *prev, struct coro *next)
743	{	1140	{
744	dSTACKLEVEL;	1141	dSTACKLEVEL;
		1142	static volatile int has_throw;
745		1143
746	/* sometimes transfer is only called to set idle_sp */	1144	/* sometimes transfer is only called to set idle_sp */
747	if (flags == TRANSFER_SET_STACKLEVEL)	1145	if (expect_false (!next))
		1146	{
748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1147	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1148	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1149	}
749	else if (prev != next)	1150	else if (expect_true (prev != next))
750	{	1151	{
751	coro_cctx *prev__cctx;	1152	coro_cctx *prev__cctx;
752		1153
		1154	if (expect_false (prev->flags & CF_NEW))
		1155	{
		1156	/* create a new empty context */
		1157	Newz (0, prev->cctx, 1, coro_cctx);
		1158	prev->flags &= ~CF_NEW;
		1159	prev->flags |= CF_RUNNING;
		1160	}
		1161
		1162	prev->flags &= ~CF_RUNNING;
		1163	next->flags |= CF_RUNNING;
		1164
753	LOCK;	1165	LOCK;
754		1166
755	if (next->mainstack)	1167	/* first get rid of the old state */
		1168	save_perl (aTHX_ prev);
		1169
		1170	if (expect_false (next->flags & CF_NEW))
756	{	1171	{
757	/* coroutine already started */	1172	/* need to start coroutine */
758	SAVE (prev, flags);	1173	next->flags &= ~CF_NEW;
759	LOAD (next);	1174	/* setup coroutine call */
		1175	coro_setup (aTHX_ next);
760	}	1176	}
761	else	1177	else
		1178	load_perl (aTHX_ next);
		1179
		1180	prev__cctx = prev->cctx;
		1181
		1182	/* possibly "free" the cctx */
		1183	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
762	{	1184	{
763	/* need to start coroutine */	1185	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
764	/* first get rid of the old state */	1186	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
765	SAVE (prev, -1);	1187
766	/* setup coroutine call */
767	setup_coro (next);
768	/* need a stack */
769	next->cctx = 0;	1188	prev->cctx = 0;
		1189
		1190	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1191	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1192	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1193	if (!next->cctx)
		1194	next->cctx = cctx_get (aTHX);
		1195
		1196	cctx_put (prev__cctx);
770	}	1197	}
771		1198
772	if (!prev->cctx)	1199	++next->usecount;
773	/* create a new empty context */
774	Newz (0, prev->cctx, 1, coro_cctx);
775		1200
776	prev__cctx = prev->cctx;
777
778	/* possibly "free" the cctx */
779	if (prev__cctx->idle_sp == STACKLEVEL)
780	{
781	cctx_put (prev__cctx);
782	prev->cctx = 0;
783	}
784
785	if (!next->cctx)	1201	if (expect_true (!next->cctx))
786	next->cctx = cctx_get ();	1202	next->cctx = cctx_get (aTHX);
787		1203
		1204	has_throw = !!next->throw;
		1205
788	if (prev__cctx != next->cctx)	1206	if (expect_false (prev__cctx != next->cctx))
789	{	1207	{
790	prev__cctx->top_env = PL_top_env;	1208	prev__cctx->top_env = PL_top_env;
791	PL_top_env = next->cctx->top_env;	1209	PL_top_env = next->cctx->top_env;
792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1210	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793	}	1211	}
794		1212
795	free_coro_mortal ();	1213	free_coro_mortal (aTHX);
796
797	UNLOCK;	1214	UNLOCK;
		1215
		1216	if (expect_false (has_throw))
		1217	{
		1218	struct coro *coro = SvSTATE (coro_current);
		1219
		1220	if (coro->throw)
		1221	{
		1222	SV *exception = coro->throw;
		1223	coro->throw = 0;
		1224	sv_setsv (ERRSV, exception);
		1225	croak (0);
		1226	}
		1227	}
798	}	1228	}
799	}	1229	}
800		1230
801	struct transfer_args	1231	struct transfer_args
802	{	1232	{
803	struct coro *prev, *next;	1233	struct coro *prev, *next;
804	int flags;
805	};	1234	};
806		1235
807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1236	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1237	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
808		1238
		1239	/** high level stuff ********************************************************/
		1240
809	static void	1241	static int
810	coro_state_destroy (struct coro *coro)	1242	coro_state_destroy (pTHX_ struct coro *coro)
811	{	1243	{
812	if (coro->refcnt--)	1244	if (coro->flags & CF_DESTROYED)
813	return;	1245	return 0;
		1246
		1247	coro->flags |= CF_DESTROYED;
		1248
		1249	if (coro->flags & CF_READY)
		1250	{
		1251	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1252	/* alternative: look through all ready queues and remove the coro */
		1253	LOCK;
		1254	--coro_nready;
		1255	UNLOCK;
		1256	}
		1257	else
		1258	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
814		1259
815	if (coro->mainstack && coro->mainstack != main_mainstack)	1260	if (coro->mainstack && coro->mainstack != main_mainstack)
816	{	1261	{
817	struct coro temp;	1262	struct coro temp;
818		1263
819	SAVE ((&temp), TRANSFER_SAVE_ALL);	1264	if (coro->flags & CF_RUNNING)
820	LOAD (coro);	1265	croak ("FATAL: tried to destroy currently running coroutine");
821		1266
822	coro_destroy_stacks ();	1267	save_perl (aTHX_ &temp);
		1268	load_perl (aTHX_ coro);
823		1269
824	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1270	coro_destroy (aTHX_ coro);
825		1271
		1272	load_perl (aTHX_ &temp);
		1273
826	coro->mainstack = 0;	1274	coro->slot = 0;
827	}	1275	}
828		1276
829	cctx_free (coro->cctx);	1277	cctx_destroy (coro->cctx);
830	SvREFCNT_dec (coro->args);	1278	SvREFCNT_dec (coro->args);
831	Safefree (coro);	1279
		1280	if (coro->next) coro->next->prev = coro->prev;
		1281	if (coro->prev) coro->prev->next = coro->next;
		1282	if (coro == coro_first) coro_first = coro->next;
		1283
		1284	return 1;
832	}	1285	}
833		1286
834	static int	1287	static int
835	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1288	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
836	{	1289	{
837	struct coro *coro = (struct coro *)mg->mg_ptr;	1290	struct coro *coro = (struct coro *)mg->mg_ptr;
838	mg->mg_ptr = 0;	1291	mg->mg_ptr = 0;
839		1292
		1293	coro->hv = 0;
		1294
		1295	if (--coro->refcnt < 0)
		1296	{
840	coro_state_destroy (coro);	1297	coro_state_destroy (aTHX_ coro);
		1298	Safefree (coro);
		1299	}
841		1300
842	return 0;	1301	return 0;
843	}	1302	}
844		1303
845	static int	1304	static int
…		…
852	return 0;	1311	return 0;
853	}	1312	}
854		1313
855	static MGVTBL coro_state_vtbl = {	1314	static MGVTBL coro_state_vtbl = {
856	0, 0, 0, 0,	1315	0, 0, 0, 0,
857	coro_state_clear,	1316	coro_state_free,
858	0,	1317	0,
859	#ifdef MGf_DUP	1318	#ifdef MGf_DUP
860	coro_state_dup,	1319	coro_state_dup,
861	#else	1320	#else
862	# define MGf_DUP 0	1321	# define MGf_DUP 0
863	#endif	1322	#endif
864	};	1323	};
865		1324
866	static struct coro *
867	SvSTATE (SV *coro)
868	{
869	HV *stash;
870	MAGIC *mg;
871
872	if (SvROK (coro))
873	coro = SvRV (coro);
874
875	stash = SvSTASH (coro);
876	if (stash != coro_stash && stash != coro_state_stash)
877	{
878	/* very slow, but rare, check */
879	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
880	croak ("Coro::State object required");
881	}
882
883	mg = SvMAGIC (coro);
884	assert (mg->mg_type == PERL_MAGIC_ext);
885	return (struct coro *)mg->mg_ptr;
886	}
887
888	static void	1325	static void
889	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1326	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
890	{	1327	{
891	ta->prev = SvSTATE (prev);	1328	ta->prev = SvSTATE (prev_sv);
892	ta->next = SvSTATE (next);	1329	ta->next = SvSTATE (next_sv);
893	ta->flags = flags;	1330	TRANSFER_CHECK (*ta);
894	}	1331	}
895		1332
896	static void	1333	static void
897	api_transfer (SV *prev, SV *next, int flags)	1334	api_transfer (SV *prev_sv, SV *next_sv)
898	{	1335	{
899	dTHX;	1336	dTHX;
900	struct transfer_args ta;	1337	struct transfer_args ta;
901		1338
902	prepare_transfer (&ta, prev, next, flags);	1339	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
903	TRANSFER (ta);	1340	TRANSFER (ta);
904	}	1341	}
905		1342
906	/** Coro ********************************************************************/	1343	/** Coro ********************************************************************/
907		1344
908	#define PRIO_MAX 3
909	#define PRIO_HIGH 1
910	#define PRIO_NORMAL 0
911	#define PRIO_LOW -1
912	#define PRIO_IDLE -3
913	#define PRIO_MIN -4
914
915	/* for Coro.pm */
916	static GV *coro_current, *coro_idle;
917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
918	static int coro_nready;
919
920	static void	1345	static void
921	coro_enq (SV *sv)	1346	coro_enq (pTHX_ SV *coro_sv)
		1347	{
		1348	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1349	}
		1350
		1351	static SV *
		1352	coro_deq (pTHX)
922	{	1353	{
923	int prio;	1354	int prio;
924		1355
925	if (SvTYPE (sv) != SVt_PVHV)
926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
927
928	prio = SvSTATE (sv)->prio;
929
930	av_push (coro_ready [prio - PRIO_MIN], sv);
931	coro_nready++;
932	}
933
934	static SV *
935	coro_deq (int min_prio)
936	{
937	int prio = PRIO_MAX - PRIO_MIN;
938
939	min_prio -= PRIO_MIN;
940	if (min_prio < 0)
941	min_prio = 0;
942
943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1356	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
944	if (AvFILLp (coro_ready [prio]) >= 0)	1357	if (AvFILLp (coro_ready [prio]) >= 0)
945	{
946	coro_nready--;
947	return av_shift (coro_ready [prio]);	1358	return av_shift (coro_ready [prio]);
948	}
949		1359
950	return 0;	1360	return 0;
951	}	1361	}
952		1362
		1363	static int
		1364	api_ready (SV *coro_sv)
		1365	{
		1366	dTHX;
		1367	struct coro *coro;
		1368
		1369	if (SvROK (coro_sv))
		1370	coro_sv = SvRV (coro_sv);
		1371
		1372	coro = SvSTATE (coro_sv);
		1373
		1374	if (coro->flags & CF_READY)
		1375	return 0;
		1376
		1377	coro->flags |= CF_READY;
		1378
		1379	LOCK;
		1380	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1381	++coro_nready;
		1382	UNLOCK;
		1383
		1384	return 1;
		1385	}
		1386
		1387	static int
		1388	api_is_ready (SV *coro_sv)
		1389	{
		1390	dTHX;
		1391	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1392	}
		1393
953	static void	1394	static void
954	api_ready (SV *coro)	1395	prepare_schedule (pTHX_ struct transfer_args *ta)
955	{	1396	{
956	dTHX;	1397	SV *prev_sv, *next_sv;
957		1398
958	if (SvROK (coro))	1399	for (;;)
959	coro = SvRV (coro);	1400	{
		1401	LOCK;
		1402	next_sv = coro_deq (aTHX);
		1403
		1404	/* nothing to schedule: call the idle handler */
		1405	if (expect_false (!next_sv))
		1406	{
		1407	dSP;
		1408	UNLOCK;
		1409
		1410	ENTER;
		1411	SAVETMPS;
		1412
		1413	PUSHMARK (SP);
		1414	PUTBACK;
		1415	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1416	SPAGAIN;
		1417
		1418	FREETMPS;
		1419	LEAVE;
		1420	continue;
		1421	}
		1422
		1423	ta->next = SvSTATE (next_sv);
		1424
		1425	/* cannot transfer to destroyed coros, skip and look for next */
		1426	if (expect_false (ta->next->flags & CF_DESTROYED))
		1427	{
		1428	UNLOCK;
		1429	SvREFCNT_dec (next_sv);
		1430	/* coro_nready is already taken care of by destroy */
		1431	continue;
		1432	}
		1433
		1434	--coro_nready;
		1435	UNLOCK;
		1436	break;
		1437	}
		1438
		1439	/* free this only after the transfer */
		1440	prev_sv = SvRV (coro_current);
		1441	ta->prev = SvSTATE (prev_sv);
		1442	TRANSFER_CHECK (*ta);
		1443	assert (ta->next->flags & CF_READY);
		1444	ta->next->flags &= ~CF_READY;
		1445	SvRV_set (coro_current, next_sv);
960		1446
961	LOCK;	1447	LOCK;
962	coro_enq (SvREFCNT_inc (coro));	1448	free_coro_mortal (aTHX);
		1449	coro_mortal = prev_sv;
963	UNLOCK;	1450	UNLOCK;
964	}	1451	}
965		1452
966	static void	1453	static void
967	prepare_schedule (struct transfer_args *ta)
968	{
969	SV *current, *prev, *next;
970
971	current = GvSV (coro_current);
972
973	for (;;)
974	{
975	LOCK;
976	next = coro_deq (PRIO_MIN);
977	UNLOCK;
978
979	if (next)
980	break;
981
982	{
983	dSP;
984
985	ENTER;
986	SAVETMPS;
987
988	PUSHMARK (SP);
989	PUTBACK;
990	call_sv (GvSV (coro_idle), G_DISCARD);
991
992	FREETMPS;
993	LEAVE;
994	}
995	}
996
997	prev = SvRV (current);
998	SvRV (current) = next;
999
1000	/* free this only after the transfer */
1001	LOCK;
1002	free_coro_mortal ();
1003	UNLOCK;
1004	coro_mortal = prev;
1005
1006	ta->prev = SvSTATE (prev);
1007	ta->next = SvSTATE (next);
1008	ta->flags = TRANSFER_SAVE_ALL;
1009	}
1010
1011	static void
1012	prepare_cede (struct transfer_args *ta)	1454	prepare_cede (pTHX_ struct transfer_args *ta)
1013	{	1455	{
1014	LOCK;	1456	api_ready (coro_current);
1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016	UNLOCK;
1017
1018	prepare_schedule (ta);	1457	prepare_schedule (aTHX_ ta);
		1458	}
		1459
		1460	static int
		1461	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1462	{
		1463	if (coro_nready)
		1464	{
		1465	SV *prev = SvRV (coro_current);
		1466	prepare_schedule (aTHX_ ta);
		1467	api_ready (prev);
		1468	return 1;
		1469	}
		1470	else
		1471	return 0;
1019	}	1472	}
1020		1473
1021	static void	1474	static void
1022	api_schedule (void)	1475	api_schedule (void)
1023	{	1476	{
1024	dTHX;	1477	dTHX;
1025	struct transfer_args ta;	1478	struct transfer_args ta;
1026		1479
1027	prepare_schedule (&ta);	1480	prepare_schedule (aTHX_ &ta);
1028	TRANSFER (ta);	1481	TRANSFER (ta);
1029	}	1482	}
1030		1483
1031	static void	1484	static int
1032	api_cede (void)	1485	api_cede (void)
1033	{	1486	{
1034	dTHX;	1487	dTHX;
1035	struct transfer_args ta;	1488	struct transfer_args ta;
1036		1489
1037	prepare_cede (&ta);	1490	prepare_cede (aTHX_ &ta);
		1491
		1492	if (expect_true (ta.prev != ta.next))
		1493	{
1038	TRANSFER (ta);	1494	TRANSFER (ta);
		1495	return 1;
		1496	}
		1497	else
		1498	return 0;
1039	}	1499	}
1040		1500
		1501	static int
		1502	api_cede_notself (void)
		1503	{
		1504	dTHX;
		1505	struct transfer_args ta;
		1506
		1507	if (prepare_cede_notself (aTHX_ &ta))
		1508	{
		1509	TRANSFER (ta);
		1510	return 1;
		1511	}
		1512	else
		1513	return 0;
		1514	}
		1515
		1516	static void
		1517	api_trace (SV *coro_sv, int flags)
		1518	{
		1519	dTHX;
		1520	struct coro *coro = SvSTATE (coro_sv);
		1521
		1522	if (flags & CC_TRACE)
		1523	{
		1524	if (!coro->cctx)
		1525	coro->cctx = cctx_new ();
		1526	else if (!(coro->cctx->flags & CC_TRACE))
		1527	croak ("cannot enable tracing on coroutine with custom stack");
		1528
		1529	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1530	}
		1531	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1532	{
		1533	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1534
		1535	if (coro->flags & CF_RUNNING)
		1536	PL_runops = RUNOPS_DEFAULT;
		1537	else
		1538	coro->slot->runops = RUNOPS_DEFAULT;
		1539	}
		1540	}
		1541
1041	MODULE = Coro::State PACKAGE = Coro::State	1542	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1042		1543
1043	PROTOTYPES: DISABLE	1544	PROTOTYPES: DISABLE
1044		1545
1045	BOOT:	1546	BOOT:
1046	{	1547	{
1047	#ifdef USE_ITHREADS	1548	#ifdef USE_ITHREADS
1048	MUTEX_INIT (&coro_mutex);	1549	MUTEX_INIT (&coro_mutex);
1049	#endif	1550	#endif
1050	BOOT_PAGESIZE;	1551	BOOT_PAGESIZE;
1051		1552
		1553	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1554	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1555
		1556	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1557	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1558	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1559	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1560
		1561	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1562	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1563	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1564
1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1565	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1053		1566
1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1567	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1568	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1569	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1570	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1057		1571
1058	main_mainstack = PL_mainstack;	1572	main_mainstack = PL_mainstack;
		1573	main_top_env = PL_top_env;
		1574
		1575	while (main_top_env->je_prev)
		1576	main_top_env = main_top_env->je_prev;
1059		1577
1060	coroapi.ver = CORO_API_VERSION;	1578	coroapi.ver = CORO_API_VERSION;
		1579	coroapi.rev = CORO_API_REVISION;
1061	coroapi.transfer = api_transfer;	1580	coroapi.transfer = api_transfer;
1062		1581
1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1582	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1064	}	1583	}
1065		1584
1066	SV *	1585	SV *
1067	new (char *klass, ...)	1586	new (char *klass, ...)
1068	CODE:	1587	CODE:
1069	{	1588	{
1070	struct coro *coro;	1589	struct coro *coro;
		1590	MAGIC *mg;
1071	HV *hv;	1591	HV *hv;
1072	int i;	1592	int i;
1073		1593
1074	Newz (0, coro, 1, struct coro);	1594	Newz (0, coro, 1, struct coro);
1075	coro->args = newAV ();	1595	coro->args = newAV ();
		1596	coro->flags = CF_NEW;
1076		1597
		1598	if (coro_first) coro_first->prev = coro;
		1599	coro->next = coro_first;
		1600	coro_first = coro;
		1601
1077	hv = newHV ();	1602	coro->hv = hv = newHV ();
1078	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1603	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1604	mg->mg_flags |= MGf_DUP;
1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1605	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1080		1606
		1607	av_extend (coro->args, items - 1);
1081	for (i = 1; i < items; i++)	1608	for (i = 1; i < items; i++)
1082	av_push (coro->args, newSVsv (ST (i)));	1609	av_push (coro->args, newSVsv (ST (i)));
1083	}	1610	}
1084	OUTPUT:	1611	OUTPUT:
1085	RETVAL	1612	RETVAL
1086		1613
		1614	# these not obviously related functions are all rolled into the same xs
		1615	# function to increase chances that they all will call transfer with the same
		1616	# stack offset
1087	void	1617	void
1088	_set_stacklevel (...)	1618	_set_stacklevel (...)
1089	ALIAS:	1619	ALIAS:
1090	Coro::State::transfer = 1	1620	Coro::State::transfer = 1
1091	Coro::schedule = 2	1621	Coro::schedule = 2
1092	Coro::cede = 3	1622	Coro::cede = 3
1093	Coro::Cont::yield = 4	1623	Coro::cede_notself = 4
1094	CODE:	1624	CODE:
1095	{	1625	{
1096	struct transfer_args ta;	1626	struct transfer_args ta;
1097		1627
		1628	PUTBACK;
1098	switch (ix)	1629	switch (ix)
1099	{	1630	{
1100	case 0:	1631	case 0:
1101	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1632	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102	ta.next = 0;	1633	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1634	break;
1105		1635
1106	case 1:	1636	case 1:
1107	if (items != 3)	1637	if (items != 2)
1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1638	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109		1639
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1640	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111	break;	1641	break;
1112		1642
1113	case 2:	1643	case 2:
1114	prepare_schedule (&ta);	1644	prepare_schedule (aTHX_ &ta);
1115	break;	1645	break;
1116		1646
1117	case 3:	1647	case 3:
1118	prepare_cede (&ta);	1648	prepare_cede (aTHX_ &ta);
1119	break;	1649	break;
1120		1650
1121	case 4:	1651	case 4:
1122	{	1652	if (!prepare_cede_notself (aTHX_ &ta))
1123	SV *yieldstack;	1653	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1654
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;	1655	break;
1146
1147	}	1656	}
		1657	SPAGAIN;
1148		1658
		1659	BARRIER;
		1660	PUTBACK;
1149	TRANSFER (ta);	1661	TRANSFER (ta);
		1662	SPAGAIN; /* might be the sp of a different coroutine now */
		1663	/* be extra careful not to ever do anything after TRANSFER */
1150	}	1664	}
1151		1665
1152	void	1666	bool
1153	_clone_state_from (SV *dst, SV *src)	1667	_destroy (SV *coro_sv)
1154	CODE:	1668	CODE:
1155	{	1669	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1670	OUTPUT:
1157		1671	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		1672
1164	void	1673	void
1165	_exit (code)	1674	_exit (code)
1166	int code	1675	int code
1167	PROTOTYPE: $	1676	PROTOTYPE: $
1168	CODE:	1677	CODE:
1169	_exit (code);	1678	_exit (code);
1170		1679
1171	int	1680	int
		1681	cctx_stacksize (int new_stacksize = 0)
		1682	CODE:
		1683	RETVAL = coro_stacksize;
		1684	if (new_stacksize)
		1685	coro_stacksize = new_stacksize;
		1686	OUTPUT:
		1687	RETVAL
		1688
		1689	int
1172	cctx_count ()	1690	cctx_count ()
1173	CODE:	1691	CODE:
1174	RETVAL = cctx_count;	1692	RETVAL = cctx_count;
1175	OUTPUT:	1693	OUTPUT:
1176	RETVAL	1694	RETVAL
…		…
1180	CODE:	1698	CODE:
1181	RETVAL = cctx_idle;	1699	RETVAL = cctx_idle;
1182	OUTPUT:	1700	OUTPUT:
1183	RETVAL	1701	RETVAL
1184		1702
		1703	void
		1704	list ()
		1705	PPCODE:
		1706	{
		1707	struct coro *coro;
		1708	for (coro = coro_first; coro; coro = coro->next)
		1709	if (coro->hv)
		1710	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1711	}
		1712
		1713	void
		1714	call (Coro::State coro, SV *coderef)
		1715	ALIAS:
		1716	eval = 1
		1717	CODE:
		1718	{
		1719	if (coro->mainstack)
		1720	{
		1721	struct coro temp;
		1722
		1723	if (!(coro->flags & CF_RUNNING))
		1724	{
		1725	PUTBACK;
		1726	save_perl (aTHX_ &temp);
		1727	load_perl (aTHX_ coro);
		1728	}
		1729
		1730	{
		1731	dSP;
		1732	ENTER;
		1733	SAVETMPS;
		1734	PUTBACK;
		1735	PUSHSTACK;
		1736	PUSHMARK (SP);
		1737
		1738	if (ix)
		1739	eval_sv (coderef, 0);
		1740	else
		1741	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1742
		1743	POPSTACK;
		1744	SPAGAIN;
		1745	FREETMPS;
		1746	LEAVE;
		1747	PUTBACK;
		1748	}
		1749
		1750	if (!(coro->flags & CF_RUNNING))
		1751	{
		1752	save_perl (aTHX_ coro);
		1753	load_perl (aTHX_ &temp);
		1754	SPAGAIN;
		1755	}
		1756	}
		1757	}
		1758
		1759	SV *
		1760	is_ready (Coro::State coro)
		1761	PROTOTYPE: $
		1762	ALIAS:
		1763	is_ready = CF_READY
		1764	is_running = CF_RUNNING
		1765	is_new = CF_NEW
		1766	is_destroyed = CF_DESTROYED
		1767	CODE:
		1768	RETVAL = boolSV (coro->flags & ix);
		1769	OUTPUT:
		1770	RETVAL
		1771
		1772	void
		1773	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1774
		1775	SV *
		1776	has_stack (Coro::State coro)
		1777	PROTOTYPE: $
		1778	CODE:
		1779	RETVAL = boolSV (!!coro->cctx);
		1780	OUTPUT:
		1781	RETVAL
		1782
		1783	int
		1784	is_traced (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	IV
		1792	rss (Coro::State coro)
		1793	PROTOTYPE: $
		1794	ALIAS:
		1795	usecount = 1
		1796	CODE:
		1797	switch (ix)
		1798	{
		1799	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1800	case 1: RETVAL = coro->usecount; break;
		1801	}
		1802	OUTPUT:
		1803	RETVAL
		1804
		1805
1185	MODULE = Coro::State PACKAGE = Coro	1806	MODULE = Coro::State PACKAGE = Coro
1186		1807
1187	BOOT:	1808	BOOT:
1188	{	1809	{
1189	int i;	1810	int i;
1190		1811
		1812	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1813	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1814	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1815
		1816	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1817	SvREADONLY_on (coro_current);
		1818
1191	coro_stash = gv_stashpv ("Coro", TRUE);	1819	coro_stash = gv_stashpv ("Coro", TRUE);
1192		1820
1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1821	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1822	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1823	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1824	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1825	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1826	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1199		1827
1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1202
1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1828	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1204	coro_ready[i] = newAV ();	1829	coro_ready[i] = newAV ();
1205		1830
1206	{	1831	{
1207	SV *sv = perl_get_sv("Coro::API", 1);	1832	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1833	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1208		1834
1209	coroapi.schedule = api_schedule;	1835	coroapi.schedule = api_schedule;
1210	coroapi.cede = api_cede;	1836	coroapi.cede = api_cede;
		1837	coroapi.cede_notself = api_cede_notself;
1211	coroapi.ready = api_ready;	1838	coroapi.ready = api_ready;
		1839	coroapi.is_ready = api_is_ready;
1212	coroapi.nready = &coro_nready;	1840	coroapi.nready = &coro_nready;
1213	coroapi.current = coro_current;	1841	coroapi.current = coro_current;
1214		1842
1215	GCoroAPI = &coroapi;	1843	GCoroAPI = &coroapi;
1216	sv_setiv (sv, (IV)&coroapi);	1844	sv_setiv (sv, (IV)&coroapi);
1217	SvREADONLY_on (sv);	1845	SvREADONLY_on (sv);
1218	}	1846	}
1219	}	1847	}
		1848
		1849	void
		1850	_set_current (SV *current)
		1851	PROTOTYPE: $
		1852	CODE:
		1853	SvREFCNT_dec (SvRV (coro_current));
		1854	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1220		1855
1221	int	1856	int
1222	prio (Coro::State coro, int newprio = 0)	1857	prio (Coro::State coro, int newprio = 0)
1223	ALIAS:	1858	ALIAS:
1224	nice = 1	1859	nice = 1
…		…
1227	RETVAL = coro->prio;	1862	RETVAL = coro->prio;
1228		1863
1229	if (items > 1)	1864	if (items > 1)
1230	{	1865	{
1231	if (ix)	1866	if (ix)
1232	newprio += coro->prio;	1867	newprio = coro->prio - newprio;
1233		1868
1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1869	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1870	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1236		1871
1237	coro->prio = newprio;	1872	coro->prio = newprio;
1238	}	1873	}
1239	}	1874	}
		1875	OUTPUT:
		1876	RETVAL
1240		1877
1241	void	1878	SV *
1242	ready (SV *self)	1879	ready (SV *self)
1243	PROTOTYPE: $	1880	PROTOTYPE: $
1244	CODE:	1881	CODE:
1245	api_ready (self);	1882	RETVAL = boolSV (api_ready (self));
		1883	OUTPUT:
		1884	RETVAL
1246		1885
1247	int	1886	int
1248	nready (...)	1887	nready (...)
1249	PROTOTYPE:	1888	PROTOTYPE:
1250	CODE:	1889	CODE:
1251	RETVAL = coro_nready;	1890	RETVAL = coro_nready;
1252	OUTPUT:	1891	OUTPUT:
1253	RETVAL	1892	RETVAL
1254		1893
		1894	void
		1895	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1896	PROTOTYPE: $;$
		1897	CODE:
		1898	SvREFCNT_dec (self->throw);
		1899	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1900
		1901	# for async_pool speedup
		1902	void
		1903	_pool_1 (SV *cb)
		1904	CODE:
		1905	{
		1906	struct coro *coro = SvSTATE (coro_current);
		1907	HV *hv = (HV *)SvRV (coro_current);
		1908	AV *defav = GvAV (PL_defgv);
		1909	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1910	AV *invoke_av;
		1911	int i, len;
		1912
		1913	if (!invoke)
		1914	{
		1915	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1916	croak ("\3async_pool terminate\2\n");
		1917	}
		1918
		1919	SvREFCNT_dec (coro->saved_deffh);
		1920	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1921
		1922	hv_store (hv, "desc", sizeof ("desc") - 1,
		1923	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1924
		1925	invoke_av = (AV *)SvRV (invoke);
		1926	len = av_len (invoke_av);
		1927
		1928	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1929
		1930	if (len > 0)
		1931	{
		1932	av_fill (defav, len - 1);
		1933	for (i = 0; i < len; ++i)
		1934	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1935	}
		1936
		1937	SvREFCNT_dec (invoke);
		1938	}
		1939
		1940	void
		1941	_pool_2 (SV *cb)
		1942	CODE:
		1943	{
		1944	struct coro *coro = SvSTATE (coro_current);
		1945
		1946	sv_setsv (cb, &PL_sv_undef);
		1947
		1948	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1949	coro->saved_deffh = 0;
		1950
		1951	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1952	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1953	{
		1954	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1955	croak ("\3async_pool terminate\2\n");
		1956	}
		1957
		1958	av_clear (GvAV (PL_defgv));
		1959	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1961
		1962	coro->prio = 0;
		1963
		1964	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1965	api_trace (coro_current, 0);
		1966
		1967	av_push (av_async_pool, newSVsv (coro_current));
		1968	}
		1969
		1970
1255	MODULE = Coro::State PACKAGE = Coro::AIO	1971	MODULE = Coro::State PACKAGE = Coro::AIO
1256		1972
1257	SV *	1973	SV *
1258	_get_state ()	1974	_get_state ()
1259	CODE:	1975	CODE:
1260	{	1976	{
1261	struct {	1977	struct io_state *data;
1262	int errorno;
1263	int laststype;
1264	int laststatval;
1265	Stat_t statcache;
1266	} data;
1267		1978
		1979	RETVAL = newSV (sizeof (struct io_state));
		1980	data = (struct io_state *)SvPVX (RETVAL);
		1981	SvCUR_set (RETVAL, sizeof (struct io_state));
		1982	SvPOK_only (RETVAL);
		1983
1268	data.errorno = errno;	1984	data->errorno = errno;
1269	data.laststype = PL_laststype;	1985	data->laststype = PL_laststype;
1270	data.laststatval = PL_laststatval;	1986	data->laststatval = PL_laststatval;
1271	data.statcache = PL_statcache;	1987	data->statcache = PL_statcache;
1272
1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
1274	}	1988	}
1275	OUTPUT:	1989	OUTPUT:
1276	RETVAL	1990	RETVAL
1277		1991
1278	void	1992	void
1279	_set_state (char *data_)	1993	_set_state (char *data_)
1280	PROTOTYPE: $	1994	PROTOTYPE: $
1281	CODE:	1995	CODE:
1282	{	1996	{
1283	struct {	1997	struct io_state *data = (void *)data_;
1284	int errorno;
1285	int laststype;
1286	int laststatval;
1287	Stat_t statcache;
1288	} *data = (void *)data_;
1289		1998
1290	errno = data->errorno;	1999	errno = data->errorno;
1291	PL_laststype = data->laststype;	2000	PL_laststype = data->laststype;
1292	PL_laststatval = data->laststatval;	2001	PL_laststatval = data->laststatval;
1293	PL_statcache = data->statcache;	2002	PL_statcache = data->statcache;
1294	}	2003	}
		2004

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