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Comparing Coro/Coro/State.xs (file contents):
Revision 1.95 by root, Sun Nov 26 17:35:42 2006 UTC vs.
Revision 1.232 by root, Thu Apr 24 12:40:38 2008 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
		24
		25	#ifdef HAVE_MMAP
		26	# include <unistd.h>
		27	# include <sys/mman.h>
		28	# ifndef MAP_ANONYMOUS
		29	# ifdef MAP_ANON
		30	# define MAP_ANONYMOUS MAP_ANON
		31	# else
		32	# undef HAVE_MMAP
		33	# endif
		34	# endif
		35	# include <limits.h>
		36	# ifndef PAGESIZE
		37	# define PAGESIZE pagesize
		38	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		39	static long pagesize;
		40	# else
		41	# define BOOT_PAGESIZE (void)0
		42	# endif
		43	#else
		44	# define PAGESIZE 0
		45	# define BOOT_PAGESIZE (void)0
		46	#endif
		47
		48	#if CORO_USE_VALGRIND
		49	# include <valgrind/valgrind.h>
		50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
		53	#endif
		54
		55	/* the maximum number of idle cctx that will be pooled */
		56	#define MAX_IDLE_CCTX 8
		57
		58	#define PERL_VERSION_ATLEAST(a,b,c) \
		59	(PERL_REVISION > (a) \
		60	|| (PERL_REVISION == (a) \
		61	&& (PERL_VERSION > (b) \
		62	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		63
		64	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	65	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	66	# define PL_ppaddr ppaddr
14	# endif	67	# endif
15	# ifndef call_sv	68	# ifndef call_sv
16	# define call_sv perl_call_sv	69	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	80	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	81	# define IS_PADCONST(v) 0
29	# endif	82	# endif
30	#endif	83	#endif
31		84
32	#include <stdio.h>	85	/* 5.8.8 */
33	#include <errno.h>	86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
		98	/* 5.8.7 */
		99	#ifndef SvRV_set
		100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
34		102
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	104	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	105	#endif
53	# include <limits.h>	106
54	# ifndef PAGESIZE	107	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	108	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	109	#endif
61	#endif
62		110
63	/* The next macro should declare a variable stacklevel that contains and approximation	111	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	112	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
		115
		116	/* The next macros try to return the current stack pointer, in an as
		117	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	118	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	119	#define STACKLEVEL ((void *)&stacklevel)
68		120
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		122
		123	#if __GNUC__ >= 3
		124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
		131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
		135
		136	#define NOINLINE attribute ((noinline))
		137
71	#include "CoroAPI.h"	138	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		139
75	#ifdef USE_ITHREADS	140	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	141	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	144	#else
80	# define LOCK (void)0	145	# define LOCK (void)0
81	# define UNLOCK (void)0	146	# define UNLOCK (void)0
82	#endif	147	#endif
83		148
		149	/* helper storage struct for Coro::AIO */
		150	struct io_state
		151	{
		152	int errorno;
		153	I32 laststype;
		154	int laststatval;
		155	Stat_t statcache;
		156	};
		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	163	static volatile SV *coro_mortal; /* will be freed after next transfer */
		164
		165	static GV *irsgv; /* $/ */
		166	static GV *stdoutgv; /* *STDOUT */
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV *hv_sig; /* %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	static struct coro_cctx *cctx_first;
		177	static int cctx_count, cctx_idle;
		178
		179	enum {
		180	CC_MAPPED = 0x01,
		181	CC_NOREUSE = 0x02, /* throw this away after tracing */
		182	CC_TRACE = 0x04,
		183	CC_TRACE_SUB = 0x08, /* trace sub calls */
		184	CC_TRACE_LINE = 0x10, /* trace each statement */
		185	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		186	};
88		187
89	/* this is a structure representing a c-level coroutine */	188	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	189	typedef struct coro_cctx {
91	struct coro_stack *next;	190	struct coro_cctx *next;
92		191
93	/* the stack */	192	/* the stack */
94	void *sptr;	193	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	194	size_t ssize;
96		195
97	/* cpu state */	196	/* cpu state */
98	void *idle_sp; /* original stacklevel when coroutine was created */	197	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		198	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	199	JMPENV *top_env;
100	coro_context cctx;	200	coro_context cctx;
101	} coro_stack;	201
		202	#if CORO_USE_VALGRIND
		203	int valgrind_id;
		204	#endif
		205	unsigned char flags;
		206	} coro_cctx;
		207
		208	enum {
		209	CF_RUNNING = 0x0001, /* coroutine is running */
		210	CF_READY = 0x0002, /* coroutine is ready */
		211	CF_NEW = 0x0004, /* has never been switched to */
		212	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		213	};
		214
		215	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		216	typedef struct {
		217	SV *defsv;
		218	AV *defav;
		219	SV *errsv;
		220	SV *irsgv;
		221	#define VAR(name,type) type name;
		222	# include "state.h"
		223	#undef VAR
		224	} perl_slots;
		225
		226	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102		227
103	/* this is a structure representing a perl-level coroutine */	228	/* this is a structure representing a perl-level coroutine */
104	struct coro {	229	struct coro {
105	/* the c coroutine allocated to this perl coroutine, if any */	230	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	231	coro_cctx *cctx;
107		232
108	/* data associated with this coroutine (initial args) */	233	/* process data */
109	AV *args;
110	int refcnt;
111
112	/* optionally saved, might be zero */
113	AV *defav;
114	SV *defsv;
115	SV *errsv;
116
117	/* saved global state not related to stacks */
118	U8 dowarn;
119	I32 in_eval;
120
121	/* the stacks and related info (callchain etc..) */
122	PERL_SI *curstackinfo;
123	AV *curstack;
124	AV *mainstack;	234	AV *mainstack;
125	SV **stack_sp;	235	perl_slots *slot; /* basically the saved sp */
126	OP *op;	236
127	SV **curpad;	237	AV *args; /* data associated with this coroutine (initial args) */
128	AV *comppad;	238	int refcnt; /* coroutines are refcounted, yes */
129	CV *compcv;	239	int flags; /* CF_ flags */
130	SV **stack_base;	240	HV *hv; /* the perl hash associated with this coro, if any */
131	SV **stack_max;	241
132	SV **tmps_stack;	242	/* statistics */
133	I32 tmps_floor;	243	int usecount; /* number of transfers to this coro */
134	I32 tmps_ix;
135	I32 tmps_max;
136	I32 *markstack;
137	I32 *markstack_ptr;
138	I32 *markstack_max;
139	I32 *scopestack;
140	I32 scopestack_ix;
141	I32 scopestack_max;
142	ANY *savestack;
143	I32 savestack_ix;
144	I32 savestack_max;
145	OP **retstack;
146	I32 retstack_ix;
147	I32 retstack_max;
148	PMOP *curpm;
149	COP *curcop;
150		244
151	/* coro process data */	245	/* coro process data */
152	int prio;	246	int prio;
		247	SV *throw; /* exception to be thrown */
		248
		249	/* async_pool */
		250	SV *saved_deffh;
		251
		252	/* linked list */
		253	struct coro *next, *prev;
153	};	254	};
154		255
155	typedef struct coro *Coro__State;	256	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	257	typedef struct coro *Coro__State_or_hashref;
157		258
		259	/** Coro ********************************************************************/
		260
		261	#define PRIO_MAX 3
		262	#define PRIO_HIGH 1
		263	#define PRIO_NORMAL 0
		264	#define PRIO_LOW -1
		265	#define PRIO_IDLE -3
		266	#define PRIO_MIN -4
		267
		268	/* for Coro.pm */
		269	static SV *coro_current;
		270	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		271	static int coro_nready;
		272	static struct coro *coro_first;
		273
		274	/** lowlevel stuff **********************************************************/
		275
		276	static SV *
		277	coro_get_sv (pTHX_ const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,10,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_sv (name, create);
		282	#endif
		283	return get_sv (name, create);
		284	}
		285
		286	static AV *
		287	coro_get_av (pTHX_ const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,10,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_av (name, create);
		292	#endif
		293	return get_av (name, create);
		294	}
		295
		296	static HV *
		297	coro_get_hv (pTHX_ const char *name, int create)
		298	{
		299	#if PERL_VERSION_ATLEAST (5,10,0)
		300	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		301	get_hv (name, create);
		302	#endif
		303	return get_hv (name, create);
		304	}
		305
158	static AV *	306	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	307	coro_clone_padlist (pTHX_ CV *cv)
160	{	308	{
161	AV *padlist = CvPADLIST (cv);	309	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	310	AV *newpadlist, *newpad;
163		311
164	newpadlist = newAV ();	312	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	313	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	314	#if PERL_VERSION_ATLEAST (5,10,0)
		315	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		316	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	317	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	318	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	319	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	320	--AvFILLp (padlist);
173		321
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	322	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
209		357
210	/* casting is fun. */	358	/* casting is fun. */
211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	359	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212	free_padlist (aTHX_ padlist);	360	free_padlist (aTHX_ padlist);
213		361
214	SvREFCNT_dec (av);
215
216	return 0;	362	return 0;
217	}	363	}
218		364
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	365	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		366	#define CORO_MAGIC_type_state PERL_MAGIC_ext
220		367
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	368	static MGVTBL coro_cv_vtbl = {
		369	0, 0, 0, 0,
		370	coro_cv_free
		371	};
		372
		373	#define CORO_MAGIC(sv,type) \
		374	SvMAGIC (sv) \
		375	? SvMAGIC (sv)->mg_type == type \
		376	? SvMAGIC (sv) \
		377	: mg_find (sv, type) \
		378	: 0
		379
		380	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		381	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		382
		383	static struct coro *
		384	SvSTATE_ (pTHX_ SV *coro)
		385	{
		386	HV *stash;
		387	MAGIC *mg;
		388
		389	if (SvROK (coro))
		390	coro = SvRV (coro);
		391
		392	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		393	croak ("Coro::State object required");
		394
		395	stash = SvSTASH (coro);
		396	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		397	{
		398	/* very slow, but rare, check */
		399	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		400	croak ("Coro::State object required");
		401	}
		402
		403	mg = CORO_MAGIC_state (coro);
		404	return (struct coro *)mg->mg_ptr;
		405	}
		406
		407	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
222		408
223	/* the next two functions merely cache the padlists */	409	/* the next two functions merely cache the padlists */
224	static void	410	static void
225	get_padlist (pTHX_ CV *cv)	411	get_padlist (pTHX_ CV *cv)
226	{	412	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	413	MAGIC *mg = CORO_MAGIC_cv (cv);
		414	AV *av;
228		415
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	416	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	417	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	418	else
232	{	419	{
233	#if 0	420	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	421	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	422	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	423	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	424	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	425	SvREFCNT_dec (cp);
239	#else	426	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	427	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	430	}
244		431
245	static void	432	static void
246	put_padlist (pTHX_ CV *cv)	433	put_padlist (pTHX_ CV *cv)
247	{	434	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	435	MAGIC *mg = CORO_MAGIC_cv (cv);
		436	AV *av;
249		437
250	if (!mg)	438	if (expect_false (!mg))
251	{	439	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();
256	}
257		440
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	441	av = (AV *)mg->mg_obj;
259	}
260		442
261	#define SB do {	443	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	444	av_extend (av, AvMAX (av) + 1);
263		445
264	#define LOAD(state) load_state(aTHX_ (state));	446	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	447	}
266		448
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	449	/** load & save, init *******************************************************/
268		450
269	static void	451	static void
270	load_state(pTHX_ Coro__State c)	452	load_perl (pTHX_ Coro__State c)
271	{	453	{
272	PL_dowarn = c->dowarn;	454	perl_slots *slot = c->slot;
273	PL_in_eval = c->in_eval;	455	c->slot = 0;
274		456
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;	457	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305		458
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	459	GvSV (PL_defgv) = slot->defsv;
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	460	GvAV (PL_defgv) = slot->defav;
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	461	GvSV (PL_errgv) = slot->errsv;
		462	GvSV (irsgv) = slot->irsgv;
		463
		464	#define VAR(name,type) PL_ ## name = slot->name;
		465	# include "state.h"
		466	#undef VAR
309		467
310	{	468	{
311	dSP;	469	dSP;
		470
312	CV *cv;	471	CV *cv;
313		472
314	/* now do the ugly restore mess */	473	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	474	while (expect_true (cv = (CV *)POPs))
316	{	475	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	476	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	477	CvDEPTH (cv) = PTR2IV (POPs);
323	}	478	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	479	}
327		480
328	PUTBACK;	481	PUTBACK;
329	}	482	}
330	}	483	}
331		484
332	static void	485	static void
333	save_state(pTHX_ Coro__State c, int flags)	486	save_perl (pTHX_ Coro__State c)
334	{	487	{
335	{	488	{
336	dSP;	489	dSP;
337	I32 cxix = cxstack_ix;	490	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	491	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	494	/*
342	* the worst thing you can imagine happens first - we have to save	495	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	496	* (and reinitialize) all cv's in the whole callchain :(
344	*/	497	*/
345		498
346	PUSHs (Nullsv);	499	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	500	/* this loop was inspired by pp_caller */
348	for (;;)	501	for (;;)
349	{	502	{
350	while (cxix >= 0)	503	while (expect_true (cxix >= 0))
351	{	504	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	505	PERL_CONTEXT *cx = &ccstk[cxix--];
353		506
354	if (CxTYPE(cx) == CXt_SUB)	507	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355	{	508	{
356	CV *cv = cx->blk_sub.cv;	509	CV *cv = cx->blk_sub.cv;
		510
357	if (CvDEPTH(cv))	511	if (expect_true (CvDEPTH (cv)))
358	{	512	{
359	EXTEND (SP, CvDEPTH(cv)*2);	513	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	514	PUSHs ((SV *)CvPADLIST (cv));
		515	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	516	PUSHs ((SV *)cv);
370		517
		518	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	519	get_padlist (aTHX_ cv);
372	}	520	}
373	}	521	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	522	}
383		523
384	if (top_si->si_type == PERLSI_MAIN)	524	if (expect_true (top_si->si_type == PERLSI_MAIN))
385	break;	525	break;
386		526
387	top_si = top_si->si_prev;	527	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	528	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	529	cxix = top_si->si_cxix;
390	}	530	}
391		531
392	PUTBACK;	532	PUTBACK;
393	}	533	}
394		534
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	535	/* allocate some space on the context stack for our purposes */
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	536	/* we manually unroll here, as usually 2 slots is enough */
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	537	if (SLOT_COUNT >= 1) CXINC;
		538	if (SLOT_COUNT >= 2) CXINC;
		539	if (SLOT_COUNT >= 3) CXINC;
		540	{
		541	int i;
		542	for (i = 3; i < SLOT_COUNT; ++i)
		543	CXINC;
		544	}
		545	cxstack_ix -= SLOT_COUNT; /* undo allocation */
398		546
399	c->dowarn = PL_dowarn;
400	c->in_eval = PL_in_eval;
401
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;	547	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;	548
406	c->op = PL_op;	549	{
407	c->curpad = PL_curpad;	550	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408	c->comppad = PL_comppad;	551
409	c->compcv = PL_compcv;	552	slot->defav = GvAV (PL_defgv);
410	c->stack_base = PL_stack_base;	553	slot->defsv = DEFSV;
411	c->stack_max = PL_stack_max;	554	slot->errsv = ERRSV;
412	c->tmps_stack = PL_tmps_stack;	555	slot->irsgv = GvSV (irsgv);
413	c->tmps_floor = PL_tmps_floor;	556
414	c->tmps_ix = PL_tmps_ix;	557	#define VAR(name,type) slot->name = PL_ ## name;
415	c->tmps_max = PL_tmps_max;	558	# include "state.h"
416	c->markstack = PL_markstack;	559	#undef VAR
417	c->markstack_ptr = PL_markstack_ptr;	560	}
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	}	561	}
433		562
434	/*	563	/*
435	* allocate various perl stacks. This is an exact copy	564	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	565	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	566	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	567	* not usually need a lot of stackspace.
439	*/	568	*/
		569	#if CORO_PREFER_PERL_FUNCTIONS
		570	# define coro_init_stacks init_stacks
		571	#else
440	static void	572	static void
441	coro_init_stacks (pTHX)	573	coro_init_stacks (pTHX)
442	{	574	{
443	LOCK;	575	PL_curstackinfo = new_stackinfo(32, 8);
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446	PL_curstackinfo->si_type = PERLSI_MAIN;	576	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	577	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	578	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		579
450	PL_stack_base = AvARRAY(PL_curstack);	580	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	581	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	582	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		583
454	New(50,PL_tmps_stack,96,SV*);	584	New(50,PL_tmps_stack,32,SV*);
455	PL_tmps_floor = -1;	585	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	586	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	587	PL_tmps_max = 32;
458		588
459	New(54,PL_markstack,16,I32);	589	New(54,PL_markstack,16,I32);
460	PL_markstack_ptr = PL_markstack;	590	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	591	PL_markstack_max = PL_markstack + 16;
462		592
463	#ifdef SET_MARK_OFFSET	593	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	594	SET_MARK_OFFSET;
465	#endif	595	#endif
466		596
467	New(54,PL_scopestack,16,I32);	597	New(54,PL_scopestack,8,I32);
468	PL_scopestack_ix = 0;	598	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	599	PL_scopestack_max = 8;
470		600
471	New(54,PL_savestack,96,ANY);	601	New(54,PL_savestack,24,ANY);
472	PL_savestack_ix = 0;	602	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	603	PL_savestack_max = 24;
474		604
475	#if PERL_VERSION < 9	605	#if !PERL_VERSION_ATLEAST (5,10,0)
476	New(54,PL_retstack,8,OP*);	606	New(54,PL_retstack,4,OP*);
477	PL_retstack_ix = 0;	607	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	608	PL_retstack_max = 4;
479	#endif	609	#endif
480
481	UNLOCK;
482	}	610	}
		611	#endif
483		612
484	/*	613	/*
485	* destroy the stacks, the callchain etc...	614	* destroy the stacks, the callchain etc...
486	*/	615	*/
487	static void	616	static void
488	destroy_stacks(pTHX)	617	coro_destroy_stacks (pTHX)
489	{	618	{
490	if (!IN_DESTRUCT)
491	{
492	/* is this ugly, I ask? */
493	LEAVE_SCOPE (0);
494
495	/* sure it is, but more important: is it correct?? :/ */
496	FREETMPS;
497
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499	}
500
501	while (PL_curstackinfo->si_next)	619	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	620	PL_curstackinfo = PL_curstackinfo->si_next;
503		621
504	while (PL_curstackinfo)	622	while (PL_curstackinfo)
505	{	623	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	624	PERL_SI *p = PL_curstackinfo->si_prev;
507		625
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	626	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	627	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		628
520	Safefree (PL_curstackinfo->si_cxstack);	629	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	630	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	631	PL_curstackinfo = p;
523	}	632	}
524		633
525	Safefree (PL_tmps_stack);	634	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	635	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	636	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	637	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	638	#if !PERL_VERSION_ATLEAST (5,10,0)
530	Safefree (PL_retstack);	639	Safefree (PL_retstack);
531	#endif	640	#endif
532	}	641	}
533		642
		643	static size_t
		644	coro_rss (pTHX_ struct coro *coro)
		645	{
		646	size_t rss = sizeof (*coro);
		647
		648	if (coro->mainstack)
		649	{
		650	perl_slots tmp_slot;
		651	perl_slots *slot;
		652
		653	if (coro->flags & CF_RUNNING)
		654	{
		655	slot = &tmp_slot;
		656
		657	#define VAR(name,type) slot->name = PL_ ## name;
		658	# include "state.h"
		659	#undef VAR
		660	}
		661	else
		662	slot = coro->slot;
		663
		664	rss += sizeof (slot->curstackinfo);
		665	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		666	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		667	rss += slot->tmps_max * sizeof (SV *);
		668	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		669	rss += slot->scopestack_max * sizeof (I32);
		670	rss += slot->savestack_max * sizeof (ANY);
		671
		672	#if !PERL_VERSION_ATLEAST (5,10,0)
		673	rss += slot->retstack_max * sizeof (OP *);
		674	#endif
		675	}
		676
		677	return rss;
		678	}
		679
		680	/** coroutine stack handling ************************************************/
		681
		682	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		683	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		684
		685	/*
		686	* This overrides the default magic get method of %SIG elements.
		687	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		688	* and instead of tryign to save and restore the hash elements, we just provide
		689	* readback here.
		690	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		691	* not expecting this to actually change the hook. This is a potential problem
		692	* when a schedule happens then, but we ignore this.
		693	*/
		694	static int
		695	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		696	{
		697	const char *s = MgPV_nolen_const (mg);
		698
		699	if (*s == '_')
		700	{
		701	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		702	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		703	}
		704
		705	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		706	}
		707
		708	static int
		709	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		710	{
		711	const char *s = MgPV_nolen_const (mg);
		712
		713	if (*s == '_')
		714	{
		715	SV **svp = 0;
		716
		717	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		718	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		719
		720	if (svp)
		721	{
		722	SV *old = *svp;
		723	*svp = newSVsv (sv);
		724	SvREFCNT_dec (old);
		725	return 0;
		726	}
		727	}
		728
		729	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		730	}
		731
534	static void	732	static void
535	setup_coro (struct coro *coro)	733	coro_setup (pTHX_ struct coro *coro)
536	{	734	{
537	/*	735	/*
538	* emulate part of the perl startup here.	736	* emulate part of the perl startup here.
539	*/	737	*/
540	dTHX;	738	coro_init_stacks (aTHX);
		739
		740	PL_runops = RUNOPS_DEFAULT;
		741	PL_curcop = &PL_compiling;
		742	PL_in_eval = EVAL_NULL;
		743	PL_comppad = 0;
		744	PL_curpm = 0;
		745	PL_curpad = 0;
		746	PL_localizing = 0;
		747	PL_dirty = 0;
		748	PL_restartop = 0;
		749	#if PERL_VERSION_ATLEAST (5,10,0)
		750	PL_parser = 0;
		751	#endif
		752
		753	/* recreate the die/warn hooks */
		754	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		755	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		756
		757	GvSV (PL_defgv) = newSV (0);
		758	GvAV (PL_defgv) = coro->args; coro->args = 0;
		759	GvSV (PL_errgv) = newSV (0);
		760	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		761	PL_rs = newSVsv (GvSV (irsgv));
		762	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		763
		764	{
		765	dSP;
		766	LOGOP myop;
		767
		768	Zero (&myop, 1, LOGOP);
		769	myop.op_next = Nullop;
		770	myop.op_flags = OPf_WANT_VOID;
		771
		772	PUSHMARK (SP);
		773	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		774	PUTBACK;
		775	PL_op = (OP *)&myop;
		776	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		777	SPAGAIN;
		778	}
		779
		780	/* this newly created coroutine might be run on an existing cctx which most
		781	* likely was suspended in set_stacklevel, called from entersub.
		782	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		783	* so we ENTER here for symmetry
		784	*/
		785	ENTER;
		786	}
		787
		788	static void
		789	coro_destroy (pTHX_ struct coro *coro)
		790	{
		791	if (!IN_DESTRUCT)
		792	{
		793	/* restore all saved variables and stuff */
		794	LEAVE_SCOPE (0);
		795	assert (PL_tmps_floor == -1);
		796
		797	/* free all temporaries */
		798	FREETMPS;
		799	assert (PL_tmps_ix == -1);
		800
		801	/* unwind all extra stacks */
		802	POPSTACK_TO (PL_mainstack);
		803
		804	/* unwind main stack */
		805	dounwind (-1);
		806	}
		807
		808	SvREFCNT_dec (GvSV (PL_defgv));
		809	SvREFCNT_dec (GvAV (PL_defgv));
		810	SvREFCNT_dec (GvSV (PL_errgv));
		811	SvREFCNT_dec (PL_defoutgv);
		812	SvREFCNT_dec (PL_rs);
		813	SvREFCNT_dec (GvSV (irsgv));
		814
		815	SvREFCNT_dec (PL_diehook);
		816	SvREFCNT_dec (PL_warnhook);
		817
		818	SvREFCNT_dec (coro->saved_deffh);
		819	SvREFCNT_dec (coro->throw);
		820
		821	coro_destroy_stacks (aTHX);
		822	}
		823
		824	static void
		825	free_coro_mortal (pTHX)
		826	{
		827	if (expect_true (coro_mortal))
		828	{
		829	SvREFCNT_dec (coro_mortal);
		830	coro_mortal = 0;
		831	}
		832	}
		833
		834	static int
		835	runops_trace (pTHX)
		836	{
		837	COP *oldcop = 0;
		838	int oldcxix = -2;
		839	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		840	coro_cctx *cctx = coro->cctx;
		841
		842	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		843	{
		844	PERL_ASYNC_CHECK ();
		845
		846	if (cctx->flags & CC_TRACE_ALL)
		847	{
		848	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		849	{
		850	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		851	SV **bot, **top;
		852	AV *av = newAV (); /* return values */
		853	SV **cb;
		854	dSP;
		855
		856	GV *gv = CvGV (cx->blk_sub.cv);
		857	SV *fullname = sv_2mortal (newSV (0));
		858	if (isGV (gv))
		859	gv_efullname3 (fullname, gv, 0);
		860
		861	bot = PL_stack_base + cx->blk_oldsp + 1;
		862	top = cx->blk_gimme == G_ARRAY ? SP + 1
		863	: cx->blk_gimme == G_SCALAR ? bot + 1
		864	: bot;
		865
		866	av_extend (av, top - bot);
		867	while (bot < top)
		868	av_push (av, SvREFCNT_inc (*bot++));
		869
		870	PL_runops = RUNOPS_DEFAULT;
		871	ENTER;
		872	SAVETMPS;
		873	EXTEND (SP, 3);
		874	PUSHMARK (SP);
		875	PUSHs (&PL_sv_no);
		876	PUSHs (fullname);
		877	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		878	PUTBACK;
		879	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		880	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		881	SPAGAIN;
		882	FREETMPS;
		883	LEAVE;
		884	PL_runops = runops_trace;
		885	}
		886
		887	if (oldcop != PL_curcop)
		888	{
		889	oldcop = PL_curcop;
		890
		891	if (PL_curcop != &PL_compiling)
		892	{
		893	SV **cb;
		894
		895	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		896	{
		897	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		898
		899	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		900	{
		901	runops_proc_t old_runops = PL_runops;
		902	dSP;
		903	GV *gv = CvGV (cx->blk_sub.cv);
		904	SV *fullname = sv_2mortal (newSV (0));
		905
		906	if (isGV (gv))
		907	gv_efullname3 (fullname, gv, 0);
		908
		909	PL_runops = RUNOPS_DEFAULT;
		910	ENTER;
		911	SAVETMPS;
		912	EXTEND (SP, 3);
		913	PUSHMARK (SP);
		914	PUSHs (&PL_sv_yes);
		915	PUSHs (fullname);
		916	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		917	PUTBACK;
		918	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		919	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		920	SPAGAIN;
		921	FREETMPS;
		922	LEAVE;
		923	PL_runops = runops_trace;
		924	}
		925
		926	oldcxix = cxstack_ix;
		927	}
		928
		929	if (cctx->flags & CC_TRACE_LINE)
		930	{
		931	dSP;
		932
		933	PL_runops = RUNOPS_DEFAULT;
		934	ENTER;
		935	SAVETMPS;
		936	EXTEND (SP, 3);
		937	PL_runops = RUNOPS_DEFAULT;
		938	PUSHMARK (SP);
		939	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		940	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		941	PUTBACK;
		942	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		943	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		944	SPAGAIN;
		945	FREETMPS;
		946	LEAVE;
		947	PL_runops = runops_trace;
		948	}
		949	}
		950	}
		951	}
		952	}
		953
		954	TAINT_NOT;
		955	return 0;
		956	}
		957
		958	/* inject a fake call to Coro::State::_cctx_init into the execution */
		959	/* _cctx_init should be careful, as it could be called at almost any time */
		960	/* during execution of a perl program */
		961	static void NOINLINE
		962	cctx_prepare (pTHX_ coro_cctx *cctx)
		963	{
541	dSP;	964	dSP;
542	UNOP myop;	965	LOGOP myop;
543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544		966
545	coro_init_stacks (aTHX);	967	PL_top_env = &PL_start_env;
546	/*PL_curcop = 0;*/
547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
548	SvREFCNT_dec (GvAV (PL_defgv));
549	GvAV (PL_defgv) = coro->args; coro->args = 0;
550		968
551	SPAGAIN;	969	if (cctx->flags & CC_TRACE)
		970	PL_runops = runops_trace;
552		971
553	Zero (&myop, 1, UNOP);	972	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	973	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	974	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556		975
		976	PUSHMARK (SP);
		977	EXTEND (SP, 2);
		978	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		979	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		980	PUTBACK;
557	PL_op = (OP *)&myop;	981	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	982	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	983	SPAGAIN;
564
565	ENTER; /* necessary e.g. for dounwind */
566	}	984	}
567		985
		986	/*
		987	* this is a _very_ stripped down perl interpreter ;)
		988	*/
568	static void	989	static void
569	free_coro_mortal ()	990	cctx_run (void *arg)
570	{	991	{
571	if (coro_mortal)	992	dTHX;
572	{	993
573	SvREFCNT_dec (coro_mortal);	994	/* cctx_run is the alternative tail of transfer(), so unlock here. */
574	coro_mortal = 0;	995	UNLOCK;
		996
		997	/* we now skip the entersub that lead to transfer() */
		998	PL_op = PL_op->op_next;
		999
		1000	/* inject a fake subroutine call to cctx_init */
		1001	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1002
		1003	/* somebody or something will hit me for both perl_run and PL_restartop */
		1004	PL_restartop = PL_op;
		1005	perl_run (PL_curinterp);
		1006
		1007	/*
		1008	* If perl-run returns we assume exit() was being called or the coro
		1009	* fell off the end, which seems to be the only valid (non-bug)
		1010	* reason for perl_run to return. We try to exit by jumping to the
		1011	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1012	* coroutine as Coro has no such concept
		1013	*/
		1014	PL_top_env = main_top_env;
		1015	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1016	}
		1017
		1018	static coro_cctx *
		1019	cctx_new ()
		1020	{
		1021	coro_cctx *cctx;
		1022	void *stack_start;
		1023	size_t stack_size;
		1024
		1025	++cctx_count;
		1026
		1027	Newz (0, cctx, 1, coro_cctx);
		1028
		1029	#if HAVE_MMAP
		1030	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1031	/* mmap supposedly does allocate-on-write for us */
		1032	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1033
		1034	if (cctx->sptr != (void *)-1)
575	}	1035	{
		1036	# if CORO_STACKGUARD
		1037	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1038	# endif
		1039	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1040	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1041	cctx->flags |= CC_MAPPED;
		1042	}
		1043	else
		1044	#endif
		1045	{
		1046	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1047	New (0, cctx->sptr, coro_stacksize, long);
		1048
		1049	if (!cctx->sptr)
		1050	{
		1051	perror ("FATAL: unable to allocate stack for coroutine");
		1052	_exit (EXIT_FAILURE);
		1053	}
		1054
		1055	stack_start = cctx->sptr;
		1056	stack_size = cctx->ssize;
		1057	}
		1058
		1059	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1060	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1061
		1062	return cctx;
576	}	1063	}
577		1064
578	static void	1065	static void
579	coro_run (void *arg)	1066	cctx_destroy (coro_cctx *cctx)
580	{	1067	{
581	/*	1068	if (!cctx)
582	* this is a _very_ stripped down perl interpreter ;)	1069	return;
583	*/
584	dTHX;
585	int ret;
586		1070
587	UNLOCK;	1071	--cctx_count;
588		1072
589	PL_top_env = &PL_start_env;	1073	#if CORO_USE_VALGRIND
590		1074	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
591	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	1075	#endif
592	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
593
594	/* continue at cctx_init, without entersub */
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restartop */
598	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
599	printf ("ret %d\n", ret);//D
600
601	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
602	abort ();
603	}
604
605	static coro_stack *
606	stack_new ()
607	{
608	coro_stack *stack;
609
610	New (0, stack, 1, coro_stack);
611		1076
612	#if HAVE_MMAP	1077	#if HAVE_MMAP
613		1078	if (cctx->flags & CC_MAPPED)
614	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1079	munmap (cctx->sptr, cctx->ssize);
615	/* mmap suppsedly does allocate-on-write for us */	1080	else
616	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617
618	if (stack->sptr == (void *)-1)
619	{
620	perror ("FATAL: unable to mmap stack for coroutine");
621	_exit (EXIT_FAILURE);
622	}
623
624	# if STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
626	# endif	1081	#endif
		1082	Safefree (cctx->sptr);
627		1083
628	#else	1084	Safefree (cctx);
		1085	}
629		1086
630	stack->ssize = STACKSIZE * (long)sizeof (long);	1087	/* wether this cctx should be destructed */
631	New (0, stack->sptr, STACKSIZE, long);	1088	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
632		1089
633	if (!stack->sptr)	1090	static coro_cctx *
634	{	1091	cctx_get (pTHX)
635	perror (stderr, "FATAL: unable to malloc stack for coroutine");	1092	{
636	_exit (EXIT_FAILURE);	1093	while (expect_true (cctx_first))
637	}	1094	{
		1095	coro_cctx *cctx = cctx_first;
		1096	cctx_first = cctx->next;
		1097	--cctx_idle;
638		1098
639	#endif	1099	if (expect_true (!CCTX_EXPIRED (cctx)))
		1100	return cctx;
640		1101
641	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	1102	cctx_destroy (cctx);
		1103	}
642		1104
643	return stack;	1105	return cctx_new ();
644	}	1106	}
645		1107
646	static void	1108	static void
647	stack_free (coro_stack *stack)	1109	cctx_put (coro_cctx *cctx)
648	{	1110	{
649	if (!stack)	1111	/* free another cctx if overlimit */
650	return;	1112	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
651
652	#if HAVE_MMAP
653	munmap (stack->sptr, stack->ssize);
654	#else
655	Safefree (stack->sptr);
656	#endif
657
658	Safefree (stack);
659	}
660
661	static coro_stack *stack_first;
662
663	static coro_stack *
664	stack_get ()
665	{
666	coro_stack *stack;
667
668	if (stack_first)
669	{
670	stack = stack_first;
671	stack_first = stack->next;
672	}
673	else
674	{	1113	{
675	stack = stack_new ();	1114	coro_cctx *first = cctx_first;
676	PL_op = PL_op->op_next;	1115	cctx_first = first->next;
		1116	--cctx_idle;
		1117
		1118	cctx_destroy (first);
677	}	1119	}
678		1120
679	return stack;	1121	++cctx_idle;
		1122	cctx->next = cctx_first;
		1123	cctx_first = cctx;
680	}	1124	}
		1125
		1126	/** coroutine switching *****************************************************/
681		1127
682	static void	1128	static void
683	stack_put (coro_stack *stack)	1129	transfer_check (pTHX_ struct coro *prev, struct coro *next)
684	{	1130	{
685	stack->next = stack_first;	1131	if (expect_true (prev != next))
686	stack_first = stack;	1132	{
687	}	1133	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1134	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
688		1135
689	/* never call directly, always through the coro_state_transfer global variable */	1136	if (expect_false (next->flags & CF_RUNNING))
690	static void	1137	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1138
		1139	if (expect_false (next->flags & CF_DESTROYED))
		1140	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1141
		1142	#if !PERL_VERSION_ATLEAST (5,10,0)
		1143	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1144	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1145	#endif
		1146	}
		1147	}
		1148
		1149	/* always use the TRANSFER macro */
		1150	static void NOINLINE
691	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1151	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
692	{	1152	{
693	dSTACKLEVEL;	1153	dSTACKLEVEL;
		1154	static volatile int has_throw;
694		1155
695	/* sometimes transfer is only called to set idle_sp */	1156	/* sometimes transfer is only called to set idle_sp */
696	if (flags == TRANSFER_SET_STACKLEVEL)	1157	if (expect_false (!next))
		1158	{
697	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1159	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
698	else if (prev != next)	1160	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
699	{	1161	}
		1162	else if (expect_true (prev != next))
		1163	{
700	coro_stack *prev__stack;	1164	coro_cctx *prev__cctx;
		1165
		1166	if (expect_false (prev->flags & CF_NEW))
		1167	{
		1168	/* create a new empty context */
		1169	Newz (0, prev->cctx, 1, coro_cctx);
		1170	prev->flags &= ~CF_NEW;
		1171	prev->flags |= CF_RUNNING;
		1172	}
		1173
		1174	prev->flags &= ~CF_RUNNING;
		1175	next->flags |= CF_RUNNING;
701		1176
702	LOCK;	1177	LOCK;
703		1178
704	if (next->mainstack)	1179	/* first get rid of the old state */
		1180	save_perl (aTHX_ prev);
		1181
		1182	if (expect_false (next->flags & CF_NEW))
705	{	1183	{
706	/* coroutine already started */	1184	/* need to start coroutine */
707	SAVE (prev, flags);	1185	next->flags &= ~CF_NEW;
708	LOAD (next);	1186	/* setup coroutine call */
		1187	coro_setup (aTHX_ next);
709	}	1188	}
710	else	1189	else
		1190	load_perl (aTHX_ next);
		1191
		1192	prev__cctx = prev->cctx;
		1193
		1194	/* possibly "free" the cctx */
		1195	if (expect_true (
		1196	prev__cctx->idle_sp == STACKLEVEL
		1197	&& !(prev__cctx->flags & CC_TRACE)
		1198	&& !force_cctx
		1199	))
711	{	1200	{
712	/* need to start coroutine */	1201	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
713	/* first get rid of the old state */	1202	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
714	SAVE (prev, -1);	1203
715	/* setup coroutine call */	1204	prev->cctx = 0;
716	setup_coro (next);	1205
717	/* need a stack */	1206	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
718	next->stack = 0;	1207	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1208	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1209	if (!next->cctx)
		1210	next->cctx = cctx_get (aTHX);
		1211
		1212	cctx_put (prev__cctx);
719	}	1213	}
720		1214
721	if (!prev->stack)	1215	++next->usecount;
722	/* create a new empty context */
723	Newz (0, prev->stack, 1, coro_stack);
724		1216
725	prev__stack = prev->stack;	1217	if (expect_true (!next->cctx))
		1218	next->cctx = cctx_get (aTHX);
726		1219
727	/* possibly "free" the stack */	1220	has_throw = !!next->throw;
728	if (prev__stack->idle_sp == STACKLEVEL)	1221
		1222	if (expect_false (prev__cctx != next->cctx))
729	{	1223	{
730	stack_put (prev__stack);	1224	prev__cctx->top_env = PL_top_env;
731	prev->stack = 0;	1225	PL_top_env = next->cctx->top_env;
		1226	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
732	}	1227	}
733		1228
734	if (!next->stack)	1229	free_coro_mortal (aTHX);
735	next->stack = stack_get ();	1230	UNLOCK;
736		1231
737	if (prev__stack != next->stack)	1232	if (expect_false (has_throw))
738	{	1233	{
739	prev__stack->top_env = PL_top_env;	1234	struct coro *coro = SvSTATE (coro_current);
740	PL_top_env = next->stack->top_env;	1235
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1236	if (coro->throw)
		1237	{
		1238	SV *exception = coro->throw;
		1239	coro->throw = 0;
		1240	sv_setsv (ERRSV, exception);
		1241	croak (0);
		1242	}
742	}	1243	}
		1244	}
		1245	}
743		1246
744	free_coro_mortal ();	1247	struct transfer_args
		1248	{
		1249	struct coro *prev, *next;
		1250	};
745		1251
		1252	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1253	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1254
		1255	/** high level stuff ********************************************************/
		1256
		1257	static int
		1258	coro_state_destroy (pTHX_ struct coro *coro)
		1259	{
		1260	if (coro->flags & CF_DESTROYED)
		1261	return 0;
		1262
		1263	coro->flags |= CF_DESTROYED;
		1264
		1265	if (coro->flags & CF_READY)
		1266	{
		1267	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1268	/* alternative: look through all ready queues and remove the coro */
		1269	LOCK;
		1270	--coro_nready;
746	UNLOCK;	1271	UNLOCK;
747	}	1272	}
748	}	1273	else
749		1274	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
750	/* use this function pointer to call the above function */
751	/* this is done to increase chances of the compiler not inlining the call */
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755	struct transfer_args
756	{
757	struct coro *prev, *next;
758	int flags;
759	};
760
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763	static void
764	coro_state_destroy (struct coro *coro)
765	{
766	if (coro->refcnt--)
767	return;
768		1275
769	if (coro->mainstack && coro->mainstack != main_mainstack)	1276	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	1277	{
771	struct coro temp;	1278	struct coro temp;
772		1279
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1280	if (coro->flags & CF_RUNNING)
		1281	croak ("FATAL: tried to destroy currently running coroutine");
		1282
		1283	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	1284	load_perl (aTHX_ coro);
775		1285
776	destroy_stacks (aTHX);	1286	coro_destroy (aTHX_ coro);
777		1287
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1288	load_perl (aTHX_ &temp);
779		1289
780	coro->mainstack = 0;	1290	coro->slot = 0;
781	}	1291	}
782		1292
783	stack_free (coro->stack);	1293	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	1294	SvREFCNT_dec (coro->args);
785	Safefree (coro);	1295
		1296	if (coro->next) coro->next->prev = coro->prev;
		1297	if (coro->prev) coro->prev->next = coro->next;
		1298	if (coro == coro_first) coro_first = coro->next;
		1299
		1300	return 1;
786	}	1301	}
787		1302
788	static int	1303	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	1304	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	1305	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	1306	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	1307	mg->mg_ptr = 0;
793		1308
		1309	coro->hv = 0;
		1310
		1311	if (--coro->refcnt < 0)
		1312	{
794	coro_state_destroy (coro);	1313	coro_state_destroy (aTHX_ coro);
		1314	Safefree (coro);
		1315	}
795		1316
796	return 0;	1317	return 0;
797	}	1318	}
798		1319
799	static int	1320	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1321	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	1322	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	1323	struct coro *coro = (struct coro *)mg->mg_ptr;
803		1324
804	++coro->refcnt;	1325	++coro->refcnt;
805		1326
806	return 0;	1327	return 0;
807	}	1328	}
808		1329
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1330	static MGVTBL coro_state_vtbl = {
810		1331	0, 0, 0, 0,
811	static struct coro *	1332	coro_state_free,
812	SvSTATE (SV *coro)	1333	0,
813	{	1334	#ifdef MGf_DUP
814	HV *stash;	1335	coro_state_dup,
815	MAGIC *mg;	1336	#else
816		1337	# define MGf_DUP 0
817	if (SvROK (coro))	1338	#endif
818	coro = SvRV (coro);	1339	};
819
820	stash = SvSTASH (coro);
821	if (stash != coro_stash && stash != coro_state_stash)
822	{
823	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");
826	}
827
828	mg = SvMAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;
831	}
832		1340
833	static void	1341	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1342	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	1343	{
836	ta->prev = SvSTATE (prev);	1344	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	1345	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;	1346	TRANSFER_CHECK (*ta);
839	}	1347	}
840		1348
841	static void	1349	static void
842	api_transfer (SV *prev, SV *next, int flags)	1350	api_transfer (SV *prev_sv, SV *next_sv)
843	{	1351	{
844	dTHX;	1352	dTHX;
845	struct transfer_args ta;	1353	struct transfer_args ta;
846		1354
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	1355	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	1356	TRANSFER (ta, 1);
849	}	1357	}
850		1358
851	/** Coro ********************************************************************/	1359	/** Coro ********************************************************************/
852		1360
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	1361	static void
866	coro_enq (pTHX_ SV *sv)	1362	coro_enq (pTHX_ SV *coro_sv)
		1363	{
		1364	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1365	}
		1366
		1367	static SV *
		1368	coro_deq (pTHX)
867	{	1369	{
868	int prio;	1370	int prio;
869		1371
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);
876	coro_nready++;
877	}
878
879	static SV *
880	coro_deq (pTHX_ int min_prio)
881	{
882	int prio = PRIO_MAX - PRIO_MIN;
883
884	min_prio -= PRIO_MIN;
885	if (min_prio < 0)
886	min_prio = 0;
887
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1372	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1373	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1374	return av_shift (coro_ready [prio]);
893	}
894		1375
895	return 0;	1376	return 0;
896	}	1377	}
897		1378
		1379	static int
		1380	api_ready (SV *coro_sv)
		1381	{
		1382	dTHX;
		1383	struct coro *coro;
		1384
		1385	if (SvROK (coro_sv))
		1386	coro_sv = SvRV (coro_sv);
		1387
		1388	coro = SvSTATE (coro_sv);
		1389
		1390	if (coro->flags & CF_READY)
		1391	return 0;
		1392
		1393	coro->flags |= CF_READY;
		1394
		1395	LOCK;
		1396	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1397	++coro_nready;
		1398	UNLOCK;
		1399
		1400	return 1;
		1401	}
		1402
		1403	static int
		1404	api_is_ready (SV *coro_sv)
		1405	{
		1406	dTHX;
		1407	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1408	}
		1409
898	static void	1410	static void
899	api_ready (SV *coro)	1411	prepare_schedule (pTHX_ struct transfer_args *ta)
900	{	1412	{
901	dTHX;	1413	SV *prev_sv, *next_sv;
902		1414
903	if (SvROK (coro))	1415	for (;;)
904	coro = SvRV (coro);	1416	{
		1417	LOCK;
		1418	next_sv = coro_deq (aTHX);
		1419
		1420	/* nothing to schedule: call the idle handler */
		1421	if (expect_false (!next_sv))
		1422	{
		1423	dSP;
		1424	UNLOCK;
		1425
		1426	ENTER;
		1427	SAVETMPS;
		1428
		1429	PUSHMARK (SP);
		1430	PUTBACK;
		1431	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1432	SPAGAIN;
		1433
		1434	FREETMPS;
		1435	LEAVE;
		1436	continue;
		1437	}
		1438
		1439	ta->next = SvSTATE (next_sv);
		1440
		1441	/* cannot transfer to destroyed coros, skip and look for next */
		1442	if (expect_false (ta->next->flags & CF_DESTROYED))
		1443	{
		1444	UNLOCK;
		1445	SvREFCNT_dec (next_sv);
		1446	/* coro_nready is already taken care of by destroy */
		1447	continue;
		1448	}
		1449
		1450	--coro_nready;
		1451	UNLOCK;
		1452	break;
		1453	}
		1454
		1455	/* free this only after the transfer */
		1456	prev_sv = SvRV (coro_current);
		1457	ta->prev = SvSTATE (prev_sv);
		1458	TRANSFER_CHECK (*ta);
		1459	assert (ta->next->flags & CF_READY);
		1460	ta->next->flags &= ~CF_READY;
		1461	SvRV_set (coro_current, next_sv);
905		1462
906	LOCK;	1463	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1464	free_coro_mortal (aTHX);
		1465	coro_mortal = prev_sv;
908	UNLOCK;	1466	UNLOCK;
909	}	1467	}
910		1468
911	static void	1469	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)
913	{
914	SV *current, *prev, *next;
915
916	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	free_coro_mortal ();
951	coro_mortal = prev;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;
958	}
959
960	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1470	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1471	{
963	LOCK;	1472	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1473	prepare_schedule (aTHX_ ta);
		1474	}
		1475
		1476	static int
		1477	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1478	{
		1479	if (coro_nready)
		1480	{
		1481	SV *prev = SvRV (coro_current);
		1482	prepare_schedule (aTHX_ ta);
		1483	api_ready (prev);
		1484	return 1;
		1485	}
		1486	else
		1487	return 0;
968	}	1488	}
969		1489
970	static void	1490	static void
971	api_schedule (void)	1491	api_schedule (void)
972	{	1492	{
973	dTHX;	1493	dTHX;
974	struct transfer_args ta;	1494	struct transfer_args ta;
975		1495
976	prepare_schedule (&ta);	1496	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1497	TRANSFER (ta, 1);
978	}	1498	}
979		1499
980	static void	1500	static int
981	api_cede (void)	1501	api_cede (void)
982	{	1502	{
983	dTHX;	1503	dTHX;
984	struct transfer_args ta;	1504	struct transfer_args ta;
985		1505
986	prepare_cede (&ta);	1506	prepare_cede (aTHX_ &ta);
		1507
		1508	if (expect_true (ta.prev != ta.next))
		1509	{
987	TRANSFER (ta);	1510	TRANSFER (ta, 1);
		1511	return 1;
		1512	}
		1513	else
		1514	return 0;
988	}	1515	}
989		1516
		1517	static int
		1518	api_cede_notself (void)
		1519	{
		1520	dTHX;
		1521	struct transfer_args ta;
		1522
		1523	if (prepare_cede_notself (aTHX_ &ta))
		1524	{
		1525	TRANSFER (ta, 1);
		1526	return 1;
		1527	}
		1528	else
		1529	return 0;
		1530	}
		1531
		1532	static void
		1533	api_trace (SV *coro_sv, int flags)
		1534	{
		1535	dTHX;
		1536	struct coro *coro = SvSTATE (coro_sv);
		1537
		1538	if (flags & CC_TRACE)
		1539	{
		1540	if (!coro->cctx)
		1541	coro->cctx = cctx_new ();
		1542	else if (!(coro->cctx->flags & CC_TRACE))
		1543	croak ("cannot enable tracing on coroutine with custom stack");
		1544
		1545	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1546	}
		1547	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1548	{
		1549	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1550
		1551	if (coro->flags & CF_RUNNING)
		1552	PL_runops = RUNOPS_DEFAULT;
		1553	else
		1554	coro->slot->runops = RUNOPS_DEFAULT;
		1555	}
		1556	}
		1557
990	MODULE = Coro::State PACKAGE = Coro::State	1558	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1559
992	PROTOTYPES: DISABLE	1560	PROTOTYPES: DISABLE
993		1561
994	BOOT:	1562	BOOT:
995	{	1563	{
996	#ifdef USE_ITHREADS	1564	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1565	MUTEX_INIT (&coro_mutex);
998	#endif	1566	#endif
999	BOOT_PAGESIZE;	1567	BOOT_PAGESIZE;
1000		1568
		1569	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1570	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1571
		1572	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1573	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1574	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1575	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1576
		1577	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1578	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1579	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1580
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1581	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1582
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1583	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1584	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1585	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1586	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1587
1007	main_mainstack = PL_mainstack;	1588	main_mainstack = PL_mainstack;
		1589	main_top_env = PL_top_env;
		1590
		1591	while (main_top_env->je_prev)
		1592	main_top_env = main_top_env->je_prev;
1008		1593
1009	coroapi.ver = CORO_API_VERSION;	1594	coroapi.ver = CORO_API_VERSION;
		1595	coroapi.rev = CORO_API_REVISION;
1010	coroapi.transfer = api_transfer;	1596	coroapi.transfer = api_transfer;
1011		1597
1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1598	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013	}	1599	}
1014		1600
1015	SV *	1601	SV *
1016	new (char *klass, ...)	1602	new (char *klass, ...)
1017	CODE:	1603	CODE:
1018	{	1604	{
1019	struct coro *coro;	1605	struct coro *coro;
		1606	MAGIC *mg;
1020	HV *hv;	1607	HV *hv;
1021	int i;	1608	int i;
1022		1609
1023	Newz (0, coro, 1, struct coro);	1610	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1611	coro->args = newAV ();
		1612	coro->flags = CF_NEW;
1025		1613
		1614	if (coro_first) coro_first->prev = coro;
		1615	coro->next = coro_first;
		1616	coro_first = coro;
		1617
1026	hv = newHV ();	1618	coro->hv = hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1619	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1620	mg->mg_flags |= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1621	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1622
		1623	av_extend (coro->args, items - 1);
1030	for (i = 1; i < items; i++)	1624	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1625	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1626	}
1036	OUTPUT:	1627	OUTPUT:
1037	RETVAL	1628	RETVAL
1038		1629
		1630	# these not obviously related functions are all rolled into the same xs
		1631	# function to increase chances that they all will call transfer with the same
		1632	# stack offset
1039	void	1633	void
1040	_set_stacklevel (...)	1634	_set_stacklevel (...)
1041	ALIAS:	1635	ALIAS:
1042	Coro::State::transfer = 1	1636	Coro::State::transfer = 1
1043	Coro::schedule = 2	1637	Coro::schedule = 2
1044	Coro::cede = 3	1638	Coro::cede = 3
1045	Coro::Cont::yield = 4	1639	Coro::cede_notself = 4
1046	CODE:	1640	CODE:
1047	{	1641	{
1048	struct transfer_args ta;	1642	struct transfer_args ta;
1049		1643
		1644	PUTBACK;
1050	switch (ix)	1645	switch (ix)
1051	{	1646	{
1052	case 0:	1647	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1648	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1649	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1650	break;
1057		1651
1058	case 1:	1652	case 1:
1059	if (items != 3)	1653	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1654	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1655
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1656	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1657	break;
1064		1658
1065	case 2:	1659	case 2:
1066	prepare_schedule (&ta);	1660	prepare_schedule (aTHX_ &ta);
1067	break;	1661	break;
1068		1662
1069	case 3:	1663	case 3:
1070	prepare_cede (&ta);	1664	prepare_cede (aTHX_ &ta);
1071	break;	1665	break;
1072		1666
1073	case 4:	1667	case 4:
1074	{	1668	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1669	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1670
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1671	break;
1098
1099	}	1672	}
		1673	SPAGAIN;
1100		1674
		1675	BARRIER;
		1676	PUTBACK;
1101	TRANSFER (ta);	1677	TRANSFER (ta, 0);
		1678	SPAGAIN; /* might be the sp of a different coroutine now */
		1679	/* be extra careful not to ever do anything after TRANSFER */
1102	}	1680	}
1103		1681
1104	void	1682	bool
1105	_clone_state_from (SV *dst, SV *src)	1683	_destroy (SV *coro_sv)
1106	CODE:	1684	CODE:
1107	{	1685	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1686	OUTPUT:
1109		1687	RETVAL
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1688
1122	void	1689	void
1123	_exit (code)	1690	_exit (code)
1124	int code	1691	int code
1125	PROTOTYPE: $	1692	PROTOTYPE: $
1126	CODE:	1693	CODE:
1127	_exit (code);	1694	_exit (code);
1128		1695
		1696	int
		1697	cctx_stacksize (int new_stacksize = 0)
		1698	CODE:
		1699	RETVAL = coro_stacksize;
		1700	if (new_stacksize)
		1701	coro_stacksize = new_stacksize;
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	int
		1706	cctx_count ()
		1707	CODE:
		1708	RETVAL = cctx_count;
		1709	OUTPUT:
		1710	RETVAL
		1711
		1712	int
		1713	cctx_idle ()
		1714	CODE:
		1715	RETVAL = cctx_idle;
		1716	OUTPUT:
		1717	RETVAL
		1718
		1719	void
		1720	list ()
		1721	PPCODE:
		1722	{
		1723	struct coro *coro;
		1724	for (coro = coro_first; coro; coro = coro->next)
		1725	if (coro->hv)
		1726	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1727	}
		1728
		1729	void
		1730	call (Coro::State coro, SV *coderef)
		1731	ALIAS:
		1732	eval = 1
		1733	CODE:
		1734	{
		1735	if (coro->mainstack)
		1736	{
		1737	struct coro temp;
		1738
		1739	if (!(coro->flags & CF_RUNNING))
		1740	{
		1741	PUTBACK;
		1742	save_perl (aTHX_ &temp);
		1743	load_perl (aTHX_ coro);
		1744	}
		1745
		1746	{
		1747	dSP;
		1748	ENTER;
		1749	SAVETMPS;
		1750	PUTBACK;
		1751	PUSHSTACK;
		1752	PUSHMARK (SP);
		1753
		1754	if (ix)
		1755	eval_sv (coderef, 0);
		1756	else
		1757	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1758
		1759	POPSTACK;
		1760	SPAGAIN;
		1761	FREETMPS;
		1762	LEAVE;
		1763	PUTBACK;
		1764	}
		1765
		1766	if (!(coro->flags & CF_RUNNING))
		1767	{
		1768	save_perl (aTHX_ coro);
		1769	load_perl (aTHX_ &temp);
		1770	SPAGAIN;
		1771	}
		1772	}
		1773	}
		1774
		1775	SV *
		1776	is_ready (Coro::State coro)
		1777	PROTOTYPE: $
		1778	ALIAS:
		1779	is_ready = CF_READY
		1780	is_running = CF_RUNNING
		1781	is_new = CF_NEW
		1782	is_destroyed = CF_DESTROYED
		1783	CODE:
		1784	RETVAL = boolSV (coro->flags & ix);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	void
		1789	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1790
		1791	SV *
		1792	has_stack (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = boolSV (!!coro->cctx);
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	int
		1800	is_traced (Coro::State coro)
		1801	PROTOTYPE: $
		1802	CODE:
		1803	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1804	OUTPUT:
		1805	RETVAL
		1806
		1807	IV
		1808	rss (Coro::State coro)
		1809	PROTOTYPE: $
		1810	ALIAS:
		1811	usecount = 1
		1812	CODE:
		1813	switch (ix)
		1814	{
		1815	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1816	case 1: RETVAL = coro->usecount; break;
		1817	}
		1818	OUTPUT:
		1819	RETVAL
		1820
		1821	void
		1822	force_cctx ()
		1823	CODE:
		1824	struct coro *coro = SvSTATE (coro_current);
		1825	coro->cctx->idle_sp = 0;
		1826
1129	MODULE = Coro::State PACKAGE = Coro	1827	MODULE = Coro::State PACKAGE = Coro
1130		1828
1131	BOOT:	1829	BOOT:
1132	{	1830	{
1133	int i;	1831	int i;
1134		1832
		1833	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1834	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1835	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1836
		1837	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1838	SvREADONLY_on (coro_current);
		1839
1135	coro_stash = gv_stashpv ("Coro", TRUE);	1840	coro_stash = gv_stashpv ("Coro", TRUE);
1136		1841
1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1842	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1843	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1844	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1845	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1846	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1847	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1848
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1849	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1850	coro_ready[i] = newAV ();
1149		1851
1150	{	1852	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1853	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1854	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1152		1855
1153	coroapi.schedule = api_schedule;	1856	coroapi.schedule = api_schedule;
1154	coroapi.cede = api_cede;	1857	coroapi.cede = api_cede;
		1858	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1859	coroapi.ready = api_ready;
		1860	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1861	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1862	coroapi.current = coro_current;
1158		1863
1159	GCoroAPI = &coroapi;	1864	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1865	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1866	SvREADONLY_on (sv);
1162	}	1867	}
1163	}	1868	}
		1869
		1870	void
		1871	_set_current (SV *current)
		1872	PROTOTYPE: $
		1873	CODE:
		1874	SvREFCNT_dec (SvRV (coro_current));
		1875	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1876
1165	int	1877	int
1166	prio (Coro::State coro, int newprio = 0)	1878	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1879	ALIAS:
1168	nice = 1	1880	nice = 1
…		…
1171	RETVAL = coro->prio;	1883	RETVAL = coro->prio;
1172		1884
1173	if (items > 1)	1885	if (items > 1)
1174	{	1886	{
1175	if (ix)	1887	if (ix)
1176	newprio += coro->prio;	1888	newprio = coro->prio - newprio;
1177		1889
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1890	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1891	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1892
1181	coro->prio = newprio;	1893	coro->prio = newprio;
1182	}	1894	}
1183	}	1895	}
		1896	OUTPUT:
		1897	RETVAL
1184		1898
1185	void	1899	SV *
1186	ready (SV *self)	1900	ready (SV *self)
1187	PROTOTYPE: $	1901	PROTOTYPE: $
1188	CODE:	1902	CODE:
1189	api_ready (self);	1903	RETVAL = boolSV (api_ready (self));
		1904	OUTPUT:
		1905	RETVAL
1190		1906
1191	int	1907	int
1192	nready (...)	1908	nready (...)
1193	PROTOTYPE:	1909	PROTOTYPE:
1194	CODE:	1910	CODE:
1195	RETVAL = coro_nready;	1911	RETVAL = coro_nready;
1196	OUTPUT:	1912	OUTPUT:
1197	RETVAL	1913	RETVAL
1198		1914
		1915	void
		1916	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1917	PROTOTYPE: $;$
		1918	CODE:
		1919	SvREFCNT_dec (self->throw);
		1920	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1921
		1922	void
		1923	swap_defsv (Coro::State self)
		1924	PROTOTYPE: $
		1925	ALIAS:
		1926	swap_defav = 1
		1927	CODE:
		1928	if (!self->slot)
		1929	croak ("cannot swap state with coroutine that has no saved state");
		1930	else
		1931	{
		1932	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1933	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1934
		1935	SV *tmp = *src; *src = *dst; *dst = tmp;
		1936	}
		1937
		1938	# for async_pool speedup
		1939	void
		1940	_pool_1 (SV *cb)
		1941	CODE:
		1942	{
		1943	struct coro *coro = SvSTATE (coro_current);
		1944	HV *hv = (HV *)SvRV (coro_current);
		1945	AV *defav = GvAV (PL_defgv);
		1946	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1947	AV *invoke_av;
		1948	int i, len;
		1949
		1950	if (!invoke)
		1951	{
		1952	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1953	croak ("\3async_pool terminate\2\n");
		1954	}
		1955
		1956	SvREFCNT_dec (coro->saved_deffh);
		1957	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1958
		1959	hv_store (hv, "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1961
		1962	invoke_av = (AV *)SvRV (invoke);
		1963	len = av_len (invoke_av);
		1964
		1965	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1966
		1967	if (len > 0)
		1968	{
		1969	av_fill (defav, len - 1);
		1970	for (i = 0; i < len; ++i)
		1971	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1972	}
		1973
		1974	SvREFCNT_dec (invoke);
		1975	}
		1976
		1977	void
		1978	_pool_2 (SV *cb)
		1979	CODE:
		1980	{
		1981	struct coro *coro = SvSTATE (coro_current);
		1982
		1983	sv_setsv (cb, &PL_sv_undef);
		1984
		1985	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1986	coro->saved_deffh = 0;
		1987
		1988	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1989	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1990	{
		1991	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1992	croak ("\3async_pool terminate\2\n");
		1993	}
		1994
		1995	av_clear (GvAV (PL_defgv));
		1996	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1997	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1998
		1999	coro->prio = 0;
		2000
		2001	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2002	api_trace (coro_current, 0);
		2003
		2004	av_push (av_async_pool, newSVsv (coro_current));
		2005	}
		2006
		2007
1199	MODULE = Coro::State PACKAGE = Coro::AIO	2008	MODULE = Coro::State PACKAGE = Coro::AIO
1200		2009
1201	SV *	2010	SV *
1202	_get_state ()	2011	_get_state ()
1203	CODE:	2012	CODE:
1204	{	2013	{
1205	struct {	2014	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		2015
		2016	RETVAL = newSV (sizeof (struct io_state));
		2017	data = (struct io_state *)SvPVX (RETVAL);
		2018	SvCUR_set (RETVAL, sizeof (struct io_state));
		2019	SvPOK_only (RETVAL);
		2020
1212	data.errorno = errno;	2021	data->errorno = errno;
1213	data.laststype = PL_laststype;	2022	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	2023	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	2024	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	2025	}
1219	OUTPUT:	2026	OUTPUT:
1220	RETVAL	2027	RETVAL
1221		2028
1222	void	2029	void
1223	_set_state (char *data_)	2030	_set_state (char *data_)
1224	PROTOTYPE: $	2031	PROTOTYPE: $
1225	CODE:	2032	CODE:
1226	{	2033	{
1227	struct {	2034	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		2035
1234	errno = data->errorno;	2036	errno = data->errorno;
1235	PL_laststype = data->laststype;	2037	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	2038	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	2039	PL_statcache = data->statcache;
1238	}	2040	}
		2041

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