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Comparing Coro/Coro/State.xs (file contents):
Revision 1.82 by root, Mon Nov 20 22:26:16 2006 UTC vs.
Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef HAVE_MMAP
		17	# include <unistd.h>
		18	# include <sys/mman.h>
		19	# ifndef MAP_ANONYMOUS
		20	# ifdef MAP_ANON
		21	# define MAP_ANONYMOUS MAP_ANON
		22	# else
		23	# undef HAVE_MMAP
		24	# endif
		25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
		33	# endif
		34	#else
		35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
		38
		39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	|| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	56	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	57	# define PL_ppaddr ppaddr
14	# endif	58	# endif
15	# ifndef call_sv	59	# ifndef call_sv
16	# define call_sv perl_call_sv	60	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	71	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	72	# define IS_PADCONST(v) 0
29	# endif	73	# endif
30	#endif	74	#endif
31		75
32	#include <errno.h>	76	/* 5.8.7 */
		77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
33		88
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	90	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	91	#endif
52	# include <limits.h>	92
53	# ifndef PAGESIZE	93	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	94	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	95	#endif
60	#endif
61		96
62	#define SUB_INIT "Coro::State::initialize"	97	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
64		101
65	/* The next macro should declare a variable stacklevel that contains and approximation	102	/* The next macros try to return the current stack pointer, in an as
66	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
67	* and should be unique. */	104	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
69		106
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		108
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
73		123
74	#include "CoroAPI.h"	124	#include "CoroAPI.h"
75		125
76	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
…		…
80	#else	130	#else
81	# define LOCK (void)0	131	# define LOCK (void)0
82	# define UNLOCK (void)0	132	# define UNLOCK (void)0
83	#endif	133	#endif
84		134
		135	/* helper storage struct for Coro::AIO */
		136	struct io_state
		137	{
		138	int errorno;
		139	I32 laststype;
		140	int laststatval;
		141	Stat_t statcache;
		142	};
		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
85	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	146	static AV *main_mainstack; /* used to differentiate between $main and others */
		147	static JMPENV *main_top_env;
87	static HV *coro_state_stash;	148	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	149	static SV *coro_mortal; /* will be freed after next transfer */
91		150
92	/* this is actually not only the c stack but also c registers etc... */	151	static GV *irsgv; /* $/ */
		152	static GV *stdoutgv; /* *STDOUT */
		153	static SV *sv_diehook;
		154	static SV *sv_warnhook;
		155
		156	/* async_pool helper stuff */
		157	static SV *sv_pool_rss;
		158	static SV *sv_pool_size;
		159	static AV *av_async_pool;
		160
		161	static struct coro_cctx *cctx_first;
		162	static int cctx_count, cctx_idle;
		163
		164	enum {
		165	CC_MAPPED = 0x01,
		166	CC_NOREUSE = 0x02, /* throw this away after tracing */
		167	CC_TRACE = 0x04,
		168	CC_TRACE_SUB = 0x08, /* trace sub calls */
		169	CC_TRACE_LINE = 0x10, /* trace each statement */
		170	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		171	};
		172
		173	/* this is a structure representing a c-level coroutine */
		174	typedef struct coro_cctx {
		175	struct coro_cctx *next;
		176
		177	/* the stack */
		178	void *sptr;
		179	size_t ssize;
		180
		181	/* cpu state */
		182	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		183	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		184	JMPENV *top_env;
		185	coro_context cctx;
		186
		187	#if CORO_USE_VALGRIND
		188	int valgrind_id;
		189	#endif
		190	unsigned char flags;
		191	} coro_cctx;
		192
		193	enum {
		194	CF_RUNNING = 0x0001, /* coroutine is running */
		195	CF_READY = 0x0002, /* coroutine is ready */
		196	CF_NEW = 0x0004, /* has never been switched to */
		197	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		198	};
		199
		200	/* the structure where most of the perl state is stored, overlaid on the cxstack */
93	typedef struct {	201	typedef struct {
94	int refcnt; /* pointer reference counter */	202	SV *defsv;
95	int usecnt; /* shared by how many coroutines */	203	AV *defav;
96	int gencnt; /* generation counter */	204	SV *errsv;
		205	SV *irsgv;
		206	#define VAR(name,type) type name;
		207	# include "state.h"
		208	#undef VAR
		209	} perl_slots;
97		210
98	coro_context cctx;	211	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99		212
100	void *sptr;	213	/* this is a structure representing a perl-level coroutine */
101	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103
104	struct coro {	214	struct coro {
105	/* the optional C context */	215	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	216	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109		217
110	/* optionally saved, might be zero */	218	/* process data */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;	219	AV *mainstack;
123	SV **stack_sp;	220	perl_slots *slot; /* basically the saved sp */
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149		221
150	/* data associated with this coroutine (initial args) */	222	/* data associated with this coroutine (initial args) */
151	AV *args;	223	AV *args;
		224	int refcnt;
		225	int flags; /* CF_ flags */
		226
		227	/* statistics */
		228	int usecount; /* number of transfers to this coro */
		229
		230	/* coro process data */
		231	int prio;
		232	SV *throw;
		233
		234	/* async_pool */
		235	SV *saved_deffh;
		236
		237	/* linked list */
		238	struct coro *next, *prev;
		239	HV *hv; /* the perl hash associated with this coro, if any */
152	};	240	};
153		241
154	typedef struct coro *Coro__State;	242	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	243	typedef struct coro *Coro__State_or_hashref;
156		244
		245	/** Coro ********************************************************************/
		246
		247	#define PRIO_MAX 3
		248	#define PRIO_HIGH 1
		249	#define PRIO_NORMAL 0
		250	#define PRIO_LOW -1
		251	#define PRIO_IDLE -3
		252	#define PRIO_MIN -4
		253
		254	/* for Coro.pm */
		255	static SV *coro_current;
		256	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		257	static int coro_nready;
		258	static struct coro *coro_first;
		259
		260	/** lowlevel stuff **********************************************************/
		261
		262	static SV *
		263	coro_get_sv (const char *name, int create)
		264	{
		265	#if PERL_VERSION_ATLEAST (5,9,0)
		266	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		267	get_sv (name, create);
		268	#endif
		269	return get_sv (name, create);
		270	}
		271
		272	static SV *
		273	coro_get_av (const char *name, int create)
		274	{
		275	#if PERL_VERSION_ATLEAST (5,9,0)
		276	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		277	get_av (name, create);
		278	#endif
		279	return get_av (name, create);
		280	}
		281
157	static AV *	282	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	283	coro_clone_padlist (pTHX_ CV *cv)
159	{	284	{
160	AV *padlist = CvPADLIST (cv);	285	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	286	AV *newpadlist, *newpad;
162		287
163	newpadlist = newAV ();	288	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	289	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	290	#if PERL_VERSION_ATLEAST (5,9,0)
		291	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		292	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	293	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	294	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	295	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	296	--AvFILLp (padlist);
172		297
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	298	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
217		342
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	343	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		344
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	345	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		346
		347	#define CORO_MAGIC(cv) \
		348	SvMAGIC (cv) \
		349	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		350	? SvMAGIC (cv) \
		351	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		352	: 0
		353
		354	static struct coro *
		355	SvSTATE_ (pTHX_ SV *coro)
		356	{
		357	HV *stash;
		358	MAGIC *mg;
		359
		360	if (SvROK (coro))
		361	coro = SvRV (coro);
		362
		363	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		364	croak ("Coro::State object required");
		365
		366	stash = SvSTASH (coro);
		367	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		368	{
		369	/* very slow, but rare, check */
		370	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		371	croak ("Coro::State object required");
		372	}
		373
		374	mg = CORO_MAGIC (coro);
		375	return (struct coro *)mg->mg_ptr;
		376	}
		377
		378	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		379
222	/* the next two functions merely cache the padlists */	380	/* the next two functions merely cache the padlists */
223	static void	381	static void
224	get_padlist (pTHX_ CV *cv)	382	get_padlist (pTHX_ CV *cv)
225	{	383	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	MAGIC *mg = CORO_MAGIC (cv);
		385	AV *av;
227		386
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	387	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	388	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	389	else
231	{	390	{
232	#if 0	391	#if CORO_PREFER_PERL_FUNCTIONS
233	/* this should work - but it doesn't :( */	392	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	393	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	394	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	395	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	396	SvREFCNT_dec (cp);
238	#else	397	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	398	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
242	}	401	}
243		402
244	static void	403	static void
245	put_padlist (pTHX_ CV *cv)	404	put_padlist (pTHX_ CV *cv)
246	{	405	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	406	MAGIC *mg = CORO_MAGIC (cv);
		407	AV *av;
248		408
249	if (!mg)	409	if (expect_false (!mg))
250	{	410	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	411	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	412	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	413	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	414	mg->mg_obj = (SV *)newAV ();
255	}	415	}
256		416
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	417	av = (AV *)mg->mg_obj;
258	}
259		418
260	#define SB do {	419	if (expect_false (AvFILLp (av) >= AvMAX (av)))
261	#define SE } while (0)	420	av_extend (av, AvMAX (av) + 1);
262		421
263	#define LOAD(state) load_state(aTHX_ (state));	422	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	423	}
265		424
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	425	/** load & save, init *******************************************************/
267		426
268	static void	427	static void
269	load_state(pTHX_ Coro__State c)	428	load_perl (pTHX_ Coro__State c)
270	{	429	{
271	PL_dowarn = c->dowarn;	430	perl_slots *slot = c->slot;
272	PL_in_eval = c->in_eval;	431	c->slot = 0;
273		432
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;	433	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		434
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	435	GvSV (PL_defgv) = slot->defsv;
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	436	GvAV (PL_defgv) = slot->defav;
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	437	GvSV (PL_errgv) = slot->errsv;
		438	GvSV (irsgv) = slot->irsgv;
		439
		440	#define VAR(name,type) PL_ ## name = slot->name;
		441	# include "state.h"
		442	#undef VAR
309		443
310	{	444	{
311	dSP;	445	dSP;
		446
312	CV *cv;	447	CV *cv;
313		448
314	/* now do the ugly restore mess */	449	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	450	while (expect_true (cv = (CV *)POPs))
316	{	451	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	452	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	453	CvDEPTH (cv) = PTR2IV (POPs);
323	}	454	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	455	}
327		456
328	PUTBACK;	457	PUTBACK;
329	}	458	}
330	}	459	}
331		460
332	static void	461	static void
333	save_state(pTHX_ Coro__State c, int flags)	462	save_perl (pTHX_ Coro__State c)
334	{	463	{
335	{	464	{
336	dSP;	465	dSP;
337	I32 cxix = cxstack_ix;	466	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	467	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	470	/*
342	* the worst thing you can imagine happens first - we have to save	471	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	472	* (and reinitialize) all cv's in the whole callchain :(
344	*/	473	*/
345		474
346	PUSHs (Nullsv);	475	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	476	/* this loop was inspired by pp_caller */
348	for (;;)	477	for (;;)
349	{	478	{
350	while (cxix >= 0)	479	while (expect_true (cxix >= 0))
351	{	480	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	481	PERL_CONTEXT *cx = &ccstk[cxix--];
353		482
354	if (CxTYPE(cx) == CXt_SUB)	483	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355	{	484	{
356	CV *cv = cx->blk_sub.cv;	485	CV *cv = cx->blk_sub.cv;
		486
357	if (CvDEPTH(cv))	487	if (expect_true (CvDEPTH (cv)))
358	{	488	{
359	EXTEND (SP, CvDEPTH(cv)*2);	489	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));	490	PUSHs ((SV *)CvPADLIST (cv));
		491	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	492	PUSHs ((SV *)cv);
370		493
		494	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	495	get_padlist (aTHX_ cv);
372	}	496	}
373	}	497	}
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	}	498	}
383		499
384	if (top_si->si_type == PERLSI_MAIN)	500	if (expect_true (top_si->si_type == PERLSI_MAIN))
385	break;	501	break;
386		502
387	top_si = top_si->si_prev;	503	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	504	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	505	cxix = top_si->si_cxix;
390	}	506	}
391		507
392	PUTBACK;	508	PUTBACK;
393	}	509	}
394		510
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	511	/* allocate some space on the context stack for our purposes */
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	512	{
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	513	/* we manually unroll here, as usually 2 slots is enough */
		514	int i;
		515	if (SLOT_COUNT >= 1) CXINC;
		516	if (SLOT_COUNT >= 2) CXINC;
		517	if (SLOT_COUNT >= 3) CXINC;
		518	for (i = 3; i < SLOT_COUNT; ++i)
		519	CXINC;
398		520
399	c->dowarn = PL_dowarn;	521	cxstack_ix -= SLOT_COUNT; /* undo allocation */
400	c->in_eval = PL_in_eval;	522	}
401		523
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;	524	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;	525
406	c->op = PL_op;	526	{
407	c->curpad = PL_curpad;	527	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408	c->comppad = PL_comppad;	528
409	c->compcv = PL_compcv;	529	slot->defav = GvAV (PL_defgv);
410	c->stack_base = PL_stack_base;	530	slot->defsv = DEFSV;
411	c->stack_max = PL_stack_max;	531	slot->errsv = ERRSV;
412	c->tmps_stack = PL_tmps_stack;	532	slot->irsgv = GvSV (irsgv);
413	c->tmps_floor = PL_tmps_floor;	533
414	c->tmps_ix = PL_tmps_ix;	534	#define VAR(name,type) slot->name = PL_ ## name;
415	c->tmps_max = PL_tmps_max;	535	# include "state.h"
416	c->markstack = PL_markstack;	536	#undef VAR
417	c->markstack_ptr = PL_markstack_ptr;	537	}
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	c->top_env = PL_top_env;
433	}	538	}
434		539
435	/*	540	/*
436	* allocate various perl stacks. This is an exact copy	541	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	542	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	543	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	544	* not usually need a lot of stackspace.
440	*/	545	*/
		546	#if CORO_PREFER_PERL_FUNCTIONS
		547	# define coro_init_stacks init_stacks
		548	#else
441	static void	549	static void
442	coro_init_stacks (pTHX)	550	coro_init_stacks (pTHX)
443	{	551	{
444	LOCK;	552	PL_curstackinfo = new_stackinfo(32, 8);
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	553	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	554	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	555	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		556
451	PL_stack_base = AvARRAY(PL_curstack);	557	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	558	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	559	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		560
455	New(50,PL_tmps_stack,96,SV*);	561	New(50,PL_tmps_stack,32,SV*);
456	PL_tmps_floor = -1;	562	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	563	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	564	PL_tmps_max = 32;
459		565
460	New(54,PL_markstack,16,I32);	566	New(54,PL_markstack,16,I32);
461	PL_markstack_ptr = PL_markstack;	567	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	568	PL_markstack_max = PL_markstack + 16;
463		569
464	#ifdef SET_MARK_OFFSET	570	#ifdef SET_MARK_OFFSET
465	SET_MARK_OFFSET;	571	SET_MARK_OFFSET;
466	#endif	572	#endif
467		573
468	New(54,PL_scopestack,16,I32);	574	New(54,PL_scopestack,8,I32);
469	PL_scopestack_ix = 0;	575	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	576	PL_scopestack_max = 8;
471		577
472	New(54,PL_savestack,96,ANY);	578	New(54,PL_savestack,24,ANY);
473	PL_savestack_ix = 0;	579	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	580	PL_savestack_max = 24;
475		581
476	#if PERL_VERSION < 9	582	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	583	New(54,PL_retstack,4,OP*);
478	PL_retstack_ix = 0;	584	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	585	PL_retstack_max = 4;
480	#endif	586	#endif
481
482	UNLOCK;
483	}	587	}
		588	#endif
484		589
485	/*	590	/*
486	* destroy the stacks, the callchain etc...	591	* destroy the stacks, the callchain etc...
487	*/	592	*/
488	static void	593	static void
489	destroy_stacks(pTHX)	594	coro_destroy_stacks (pTHX)
490	{	595	{
491	if (!IN_DESTRUCT)
492	{
493	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);
495
496	/* sure it is, but more important: is it correct?? :/ */
497	FREETMPS;
498
499	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
500	}
501
502	while (PL_curstackinfo->si_next)	596	while (PL_curstackinfo->si_next)
503	PL_curstackinfo = PL_curstackinfo->si_next;	597	PL_curstackinfo = PL_curstackinfo->si_next;
504		598
505	while (PL_curstackinfo)	599	while (PL_curstackinfo)
506	{	600	{
507	PERL_SI *p = PL_curstackinfo->si_prev;	601	PERL_SI *p = PL_curstackinfo->si_prev;
508		602
509	{ /*D*//*remove*/
510	dSP;
511	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512	PUTBACK; /* possibly superfluous */
513	}
514
515	if (!IN_DESTRUCT)	603	if (!IN_DESTRUCT)
516	{
517	dounwind (-1);/*D*//*remove*/
518	SvREFCNT_dec (PL_curstackinfo->si_stack);	604	SvREFCNT_dec (PL_curstackinfo->si_stack);
519	}
520		605
521	Safefree (PL_curstackinfo->si_cxstack);	606	Safefree (PL_curstackinfo->si_cxstack);
522	Safefree (PL_curstackinfo);	607	Safefree (PL_curstackinfo);
523	PL_curstackinfo = p;	608	PL_curstackinfo = p;
524	}	609	}
525		610
526	Safefree (PL_tmps_stack);	611	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	612	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	613	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	614	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	615	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	616	Safefree (PL_retstack);
532	#endif	617	#endif
533	}	618	}
534		619
535	static void	620	static size_t
536	allocate_stack (Coro__State ctx, int alloc)	621	coro_rss (pTHX_ struct coro *coro)
537	{	622	{
538	coro_stack *stack;	623	size_t rss = sizeof (*coro);
539		624
540	New (0, stack, 1, coro_stack);	625	if (coro->mainstack)
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{	626	{
548	#if HAVE_MMAP	627	perl_slots tmp_slot;
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	628	perl_slots *slot;
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	629
551	if (stack->sptr != (void *)-1)	630	if (coro->flags & CF_RUNNING)
552	{	631	{
553	# if STACKGUARD	632	slot = &tmp_slot;
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	633
555	# endif	634	#define VAR(name,type) slot->name = PL_ ## name;
		635	# include "state.h"
		636	#undef VAR
556	}	637	}
557	else	638	else
558	#endif	639	slot = coro->slot;
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566		640
567	ctx->stack = stack;	641	rss += sizeof (slot->curstackinfo);
568	}	642	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		643	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		644	rss += slot->tmps_max * sizeof (SV *);
		645	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		646	rss += slot->scopestack_max * sizeof (I32);
		647	rss += slot->savestack_max * sizeof (ANY);
569		648
570	static void	649	#if !PERL_VERSION_ATLEAST (5,9,0)
571	deallocate_stack (Coro__State ctx)	650	rss += slot->retstack_max * sizeof (OP *);
572	{	651	#endif
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{	652	}
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587		653
588	Safefree (stack);	654	return rss;
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}	655	}
594		656
		657	/** coroutine stack handling ************************************************/
		658
595	static void	659	static void
596	setup_coro (void *arg)	660	coro_setup (pTHX_ struct coro *coro)
597	{	661	{
598	/*	662	/*
599	* emulate part of the perl startup here.	663	* emulate part of the perl startup here.
600	*/	664	*/
		665	coro_init_stacks (aTHX);
		666
		667	PL_runops = RUNOPS_DEFAULT;
		668	PL_curcop = &PL_compiling;
		669	PL_in_eval = EVAL_NULL;
		670	PL_comppad = 0;
		671	PL_curpm = 0;
		672	PL_curpad = 0;
		673	PL_localizing = 0;
		674	PL_dirty = 0;
		675	PL_restartop = 0;
		676	PL_diehook = SvREFCNT_inc (sv_diehook);
		677	PL_warnhook = SvREFCNT_inc (sv_warnhook);
		678
		679	GvSV (PL_defgv) = newSV (0);
		680	GvAV (PL_defgv) = coro->args; coro->args = 0;
		681	GvSV (PL_errgv) = newSV (0);
		682	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		683	PL_rs = newSVsv (GvSV (irsgv));
		684	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		685
		686	{
		687	dSP;
		688	LOGOP myop;
		689
		690	Zero (&myop, 1, LOGOP);
		691	myop.op_next = Nullop;
		692	myop.op_flags = OPf_WANT_VOID;
		693
		694	PUSHMARK (SP);
		695	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		696	PUTBACK;
		697	PL_op = (OP *)&myop;
		698	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		699	SPAGAIN;
		700	}
		701
		702	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		703	}
		704
		705	static void
		706	coro_destroy (pTHX_ struct coro *coro)
		707	{
		708	if (!IN_DESTRUCT)
		709	{
		710	/* restore all saved variables and stuff */
		711	LEAVE_SCOPE (0);
		712	assert (PL_tmps_floor == -1);
		713
		714	/* free all temporaries */
		715	FREETMPS;
		716	assert (PL_tmps_ix == -1);
		717
		718	/* unwind all extra stacks */
		719	POPSTACK_TO (PL_mainstack);
		720
		721	/* unwind main stack */
		722	dounwind (-1);
		723	}
		724
		725	SvREFCNT_dec (GvSV (PL_defgv));
		726	SvREFCNT_dec (GvAV (PL_defgv));
		727	SvREFCNT_dec (GvSV (PL_errgv));
		728	SvREFCNT_dec (PL_defoutgv);
		729	SvREFCNT_dec (PL_rs);
		730	SvREFCNT_dec (GvSV (irsgv));
		731
		732	SvREFCNT_dec (PL_diehook);
		733	SvREFCNT_dec (PL_warnhook);
		734
		735	SvREFCNT_dec (coro->saved_deffh);
		736	SvREFCNT_dec (coro->throw);
		737
		738	coro_destroy_stacks (aTHX);
		739	}
		740
		741	static void
		742	free_coro_mortal (pTHX)
		743	{
		744	if (expect_true (coro_mortal))
		745	{
		746	SvREFCNT_dec (coro_mortal);
		747	coro_mortal = 0;
		748	}
		749	}
		750
		751	static int
		752	runops_trace (pTHX)
		753	{
		754	COP *oldcop = 0;
		755	int oldcxix = -2;
		756	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		757	coro_cctx *cctx = coro->cctx;
		758
		759	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		760	{
		761	PERL_ASYNC_CHECK ();
		762
		763	if (cctx->flags & CC_TRACE_ALL)
		764	{
		765	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		766	{
		767	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		768	SV **bot, **top;
		769	AV *av = newAV (); /* return values */
		770	SV **cb;
		771	dSP;
		772
		773	GV *gv = CvGV (cx->blk_sub.cv);
		774	SV *fullname = sv_2mortal (newSV (0));
		775	if (isGV (gv))
		776	gv_efullname3 (fullname, gv, 0);
		777
		778	bot = PL_stack_base + cx->blk_oldsp + 1;
		779	top = cx->blk_gimme == G_ARRAY ? SP + 1
		780	: cx->blk_gimme == G_SCALAR ? bot + 1
		781	: bot;
		782
		783	av_extend (av, top - bot);
		784	while (bot < top)
		785	av_push (av, SvREFCNT_inc (*bot++));
		786
		787	PL_runops = RUNOPS_DEFAULT;
		788	ENTER;
		789	SAVETMPS;
		790	EXTEND (SP, 3);
		791	PUSHMARK (SP);
		792	PUSHs (&PL_sv_no);
		793	PUSHs (fullname);
		794	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		795	PUTBACK;
		796	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		797	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		798	SPAGAIN;
		799	FREETMPS;
		800	LEAVE;
		801	PL_runops = runops_trace;
		802	}
		803
		804	if (oldcop != PL_curcop)
		805	{
		806	oldcop = PL_curcop;
		807
		808	if (PL_curcop != &PL_compiling)
		809	{
		810	SV **cb;
		811
		812	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		813	{
		814	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		815
		816	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		817	{
		818	runops_proc_t old_runops = PL_runops;
		819	dSP;
		820	GV *gv = CvGV (cx->blk_sub.cv);
		821	SV *fullname = sv_2mortal (newSV (0));
		822
		823	if (isGV (gv))
		824	gv_efullname3 (fullname, gv, 0);
		825
		826	PL_runops = RUNOPS_DEFAULT;
		827	ENTER;
		828	SAVETMPS;
		829	EXTEND (SP, 3);
		830	PUSHMARK (SP);
		831	PUSHs (&PL_sv_yes);
		832	PUSHs (fullname);
		833	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		834	PUTBACK;
		835	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		836	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		837	SPAGAIN;
		838	FREETMPS;
		839	LEAVE;
		840	PL_runops = runops_trace;
		841	}
		842
		843	oldcxix = cxstack_ix;
		844	}
		845
		846	if (cctx->flags & CC_TRACE_LINE)
		847	{
		848	dSP;
		849
		850	PL_runops = RUNOPS_DEFAULT;
		851	ENTER;
		852	SAVETMPS;
		853	EXTEND (SP, 3);
		854	PL_runops = RUNOPS_DEFAULT;
		855	PUSHMARK (SP);
		856	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		857	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		858	PUTBACK;
		859	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		860	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		861	SPAGAIN;
		862	FREETMPS;
		863	LEAVE;
		864	PL_runops = runops_trace;
		865	}
		866	}
		867	}
		868	}
		869	}
		870
		871	TAINT_NOT;
		872	return 0;
		873	}
		874
		875	/* inject a fake call to Coro::State::_cctx_init into the execution */
		876	/* _cctx_init should be careful, as it could be called at almost any time */
		877	/* during execution of a perl program */
		878	static void NOINLINE
		879	prepare_cctx (pTHX_ coro_cctx *cctx)
		880	{
		881	dSP;
		882	LOGOP myop;
		883
		884	PL_top_env = &PL_start_env;
		885
		886	if (cctx->flags & CC_TRACE)
		887	PL_runops = runops_trace;
		888
		889	Zero (&myop, 1, LOGOP);
		890	myop.op_next = PL_op;
		891	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		892
		893	PUSHMARK (SP);
		894	EXTEND (SP, 2);
		895	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		896	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		897	PUTBACK;
		898	PL_op = (OP *)&myop;
		899	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		900	SPAGAIN;
		901	}
		902
		903	/*
		904	* this is a _very_ stripped down perl interpreter ;)
		905	*/
		906	static void
		907	coro_run (void *arg)
		908	{
601	dTHX;	909	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		910
606	coro_init_stacks (aTHX);	911	/* coro_run is the alternative tail of transfer(), so unlock here. */
607	/*PL_curcop = 0;*/	912	UNLOCK;
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */
609	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
611		913
612	SPAGAIN;	914	/* we now skip the entersub that lead to transfer() */
		915	PL_op = PL_op->op_next;
613		916
614	if (ctx->stack)	917	/* inject a fake subroutine call to cctx_init */
615	{	918	prepare_cctx (aTHX_ (coro_cctx *)arg);
616	ctx->cursp = 0;
617		919
618	PUSHMARK(SP);	920	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PUTBACK;	921	PL_restartop = PL_op;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	922	perl_run (PL_curinterp);
621		923
622	if (SvTRUE (ERRSV))	924	/*
623	croak (NULL);	925	* If perl-run returns we assume exit() was being called or the coro
624	else	926	* fell off the end, which seems to be the only valid (non-bug)
625	croak ("FATAL: CCTXT coroutine returned!");	927	* reason for perl_run to return. We try to exit by jumping to the
		928	* bootstrap-time "top" top_env, as we cannot restore the "main"
		929	* coroutine as Coro has no such concept
		930	*/
		931	PL_top_env = main_top_env;
		932	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		933	}
		934
		935	static coro_cctx *
		936	cctx_new ()
		937	{
		938	coro_cctx *cctx;
		939	void *stack_start;
		940	size_t stack_size;
		941
		942	++cctx_count;
		943
		944	Newz (0, cctx, 1, coro_cctx);
		945
		946	#if HAVE_MMAP
		947
		948	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		949	/* mmap supposedly does allocate-on-write for us */
		950	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		951
		952	if (cctx->sptr != (void *)-1)
		953	{
		954	# if CORO_STACKGUARD
		955	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		956	# endif
		957	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		958	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		959	cctx->flags |= CC_MAPPED;
626	}	960	}
627	else	961	else
628	{	962	#endif
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;
649
650	ENTER; /* necessary e.g. for dounwind */
651	}	963	{
652	}	964	cctx->ssize = coro_stacksize * (long)sizeof (long);
		965	New (0, cctx->sptr, coro_stacksize, long);
653		966
654	static void	967	if (!cctx->sptr)
655	continue_coro (void *arg)	968	{
656	{	969	perror ("FATAL: unable to allocate stack for coroutine");
657	/*	970	_exit (EXIT_FAILURE);
658	* this is a _very_ stripped down perl interpreter ;)	971	}
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662		972
663	PL_top_env = &PL_start_env;	973	stack_start = cctx->sptr;
		974	stack_size = cctx->ssize;
		975	}
664		976
665	ctx->cursp = 0;	977	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
666	PL_op = PL_op->op_next;	978	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
667	CALLRUNOPS(aTHX);
668		979
669	abort ();	980	return cctx;
670	}	981	}
671		982
672	static void	983	static void
		984	cctx_destroy (coro_cctx *cctx)
		985	{
		986	if (!cctx)
		987	return;
		988
		989	--cctx_count;
		990
		991	#if CORO_USE_VALGRIND
		992	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		993	#endif
		994
		995	#if HAVE_MMAP
		996	if (cctx->flags & CC_MAPPED)
		997	munmap (cctx->sptr, cctx->ssize);
		998	else
		999	#endif
		1000	Safefree (cctx->sptr);
		1001
		1002	Safefree (cctx);
		1003	}
		1004
		1005	/* wether this cctx should be destructed */
		1006	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1007
		1008	static coro_cctx *
		1009	cctx_get (pTHX)
		1010	{
		1011	while (expect_true (cctx_first))
		1012	{
		1013	coro_cctx *cctx = cctx_first;
		1014	cctx_first = cctx->next;
		1015	--cctx_idle;
		1016
		1017	if (expect_true (!CCTX_EXPIRED (cctx)))
		1018	return cctx;
		1019
		1020	cctx_destroy (cctx);
		1021	}
		1022
		1023	return cctx_new ();
		1024	}
		1025
		1026	static void
		1027	cctx_put (coro_cctx *cctx)
		1028	{
		1029	/* free another cctx if overlimit */
		1030	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1031	{
		1032	coro_cctx *first = cctx_first;
		1033	cctx_first = first->next;
		1034	--cctx_idle;
		1035
		1036	cctx_destroy (first);
		1037	}
		1038
		1039	++cctx_idle;
		1040	cctx->next = cctx_first;
		1041	cctx_first = cctx;
		1042	}
		1043
		1044	/** coroutine switching *****************************************************/
		1045
		1046	static void
		1047	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1048	{
		1049	if (expect_true (prev != next))
		1050	{
		1051	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1052	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1053
		1054	if (expect_false (next->flags & CF_RUNNING))
		1055	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1056
		1057	if (expect_false (next->flags & CF_DESTROYED))
		1058	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1059
		1060	if (
		1061	#if PERL_VERSION_ATLEAST (5,9,0)
		1062	expect_false (PL_parser)
		1063	#else
		1064	expect_false (PL_lex_state != LEX_NOTPARSING)
		1065	#endif
		1066	)
		1067	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1068	}
		1069	}
		1070
		1071	/* always use the TRANSFER macro */
		1072	static void NOINLINE
673	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	1073	transfer (pTHX_ struct coro *prev, struct coro *next)
674	{	1074	{
675	dSTACKLEVEL;	1075	dSTACKLEVEL;
676		1076
677	if (prev != next)	1077	/* sometimes transfer is only called to set idle_sp */
		1078	if (expect_false (!next))
		1079	{
		1080	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1081	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
678	{	1082	}
679	/* has this coro been created yet? */	1083	else if (expect_true (prev != next))
680	if (next->mainstack)	1084	{
		1085	coro_cctx *prev__cctx;
		1086
		1087	if (expect_false (prev->flags & CF_NEW))
681	{	1088	{
682	LOCK;	1089	/* create a new empty context */
683	SAVE (prev, flags);	1090	Newz (0, prev->cctx, 1, coro_cctx);
684	LOAD (next);	1091	prev->flags &= ~CF_NEW;
685	UNLOCK;	1092	prev->flags |= CF_RUNNING;
686
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	prev->cursp = stacklevel;
715	/* don't add any code here */
716	}
717	else
718	next->cursp = stacklevel;
719	}	1093	}
720	else if (next->tmps_ix == -2)	1094
721	croak ("tried to transfer to running coroutine");	1095	prev->flags &= ~CF_RUNNING;
		1096	next->flags |= CF_RUNNING;
		1097
		1098	LOCK;
		1099
		1100	if (expect_false (next->flags & CF_NEW))
		1101	{
		1102	/* need to start coroutine */
		1103	next->flags &= ~CF_NEW;
		1104	/* first get rid of the old state */
		1105	save_perl (aTHX_ prev);
		1106	/* setup coroutine call */
		1107	coro_setup (aTHX_ next);
		1108	}
722	else	1109	else
723	{	1110	{
724	LOCK;	1111	/* coroutine already started */
725	SAVE (prev, -1); /* first get rid of the old state */	1112	save_perl (aTHX_ prev);
		1113	load_perl (aTHX_ next);
		1114	}
		1115
		1116	prev__cctx = prev->cctx;
		1117
		1118	/* possibly "free" the cctx */
		1119	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1120	{
		1121	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1122	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1123
		1124	prev->cctx = 0;
		1125
		1126	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1127	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1128	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1129	next->cctx = cctx_get (aTHX);
		1130
		1131	cctx_put (prev__cctx);
		1132	}
		1133
		1134	++next->usecount;
		1135
		1136	if (expect_true (!next->cctx))
		1137	next->cctx = cctx_get (aTHX);
		1138
		1139	if (expect_false (prev__cctx != next->cctx))
		1140	{
		1141	prev__cctx->top_env = PL_top_env;
		1142	PL_top_env = next->cctx->top_env;
		1143	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1144	}
		1145
		1146	free_coro_mortal (aTHX);
726	UNLOCK;	1147	UNLOCK;
727		1148
728	/* create the coroutine for the first time */	1149	if (expect_false (prev->throw || next->throw))
729	if (flags & TRANSFER_SAVE_CCTXT)	1150	{
		1151	struct coro *coro = SvSTATE (coro_current);
		1152
		1153	if (coro->throw)
730	{	1154	{
731	if (!prev->stack)	1155	SV *exception = coro->throw;
732	allocate_stack (prev, 0);	1156	coro->throw = 0;
733		1157	sv_setsv (ERRSV, exception);
734	/* the new coroutine starts with start_env again */
735	PL_top_env = &PL_start_env;
736
737	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
738	{
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);	1158	croak (0);
762	next->cursp = stacklevel;
763	}	1159	}
764	}	1160	}
765	}	1161	}
		1162	}
766		1163
767	LOCK;	1164	struct transfer_args
768	if (coro_mortal)	1165	{
769	{	1166	struct coro *prev, *next;
770	SvREFCNT_dec (coro_mortal);	1167	};
771	coro_mortal = 0;	1168
		1169	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1170	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1171
		1172	/** high level stuff ********************************************************/
		1173
		1174	static int
		1175	coro_state_destroy (pTHX_ struct coro *coro)
		1176	{
		1177	if (coro->flags & CF_DESTROYED)
		1178	return 0;
		1179
		1180	coro->flags |= CF_DESTROYED;
		1181
		1182	if (coro->flags & CF_READY)
772	}	1183	{
		1184	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1185	/* alternative: look through all ready queues and remove the coro */
		1186	LOCK;
		1187	--coro_nready;
773	UNLOCK;	1188	UNLOCK;
774	}	1189	}
		1190	else
		1191	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
775		1192
776	#define SV_CORO(sv,func) \	1193	if (coro->mainstack && coro->mainstack != main_mainstack)
777	do { \	1194	{
778	if (SvROK (sv)) \	1195	struct coro temp;
779	sv = SvRV (sv); \
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		1196
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1197	if (coro->flags & CF_RUNNING)
		1198	croak ("FATAL: tried to destroy currently running coroutine");
798		1199
		1200	save_perl (aTHX_ &temp);
		1201	load_perl (aTHX_ coro);
		1202
		1203	coro_destroy (aTHX_ coro);
		1204
		1205	load_perl (aTHX_ &temp);
		1206
		1207	coro->slot = 0;
		1208	}
		1209
		1210	cctx_destroy (coro->cctx);
		1211	SvREFCNT_dec (coro->args);
		1212
		1213	if (coro->next) coro->next->prev = coro->prev;
		1214	if (coro->prev) coro->prev->next = coro->next;
		1215	if (coro == coro_first) coro_first = coro->next;
		1216
		1217	return 1;
		1218	}
		1219
799	static void	1220	static int
		1221	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1222	{
		1223	struct coro *coro = (struct coro *)mg->mg_ptr;
		1224	mg->mg_ptr = 0;
		1225
		1226	coro->hv = 0;
		1227
		1228	if (--coro->refcnt < 0)
		1229	{
		1230	coro_state_destroy (aTHX_ coro);
		1231	Safefree (coro);
		1232	}
		1233
		1234	return 0;
		1235	}
		1236
		1237	static int
		1238	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1239	{
		1240	struct coro *coro = (struct coro *)mg->mg_ptr;
		1241
		1242	++coro->refcnt;
		1243
		1244	return 0;
		1245	}
		1246
		1247	static MGVTBL coro_state_vtbl = {
		1248	0, 0, 0, 0,
		1249	coro_state_free,
		1250	0,
		1251	#ifdef MGf_DUP
		1252	coro_state_dup,
		1253	#else
		1254	# define MGf_DUP 0
		1255	#endif
		1256	};
		1257
		1258	static void
		1259	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1260	{
		1261	ta->prev = SvSTATE (prev_sv);
		1262	ta->next = SvSTATE (next_sv);
		1263	TRANSFER_CHECK (*ta);
		1264	}
		1265
		1266	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1267	api_transfer (SV *prev_sv, SV *next_sv)
801	{	1268	{
802	SV_CORO (prev, "Coro::transfer");	1269	dTHX;
803	SV_CORO (next, "Coro::transfer");	1270	struct transfer_args ta;
804		1271
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1272	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1273	TRANSFER (ta);
806	}	1274	}
807		1275
808	/** Coro ********************************************************************/	1276	/** Coro ********************************************************************/
809		1277
810	#define PRIO_MAX 3
811	#define PRIO_HIGH 1
812	#define PRIO_NORMAL 0
813	#define PRIO_LOW -1
814	#define PRIO_IDLE -3
815	#define PRIO_MIN -4
816
817	/* for Coro.pm */
818	static GV *coro_current, *coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;
821
822	static void	1278	static void
823	coro_enq (pTHX_ SV *sv)	1279	coro_enq (pTHX_ SV *coro_sv)
824	{	1280	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	1281	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1282	}
841		1283
842	static SV *	1284	static SV *
843	coro_deq (pTHX_ int min_prio)	1285	coro_deq (pTHX_ int min_prio)
844	{	1286	{
…		…
847	min_prio -= PRIO_MIN;	1289	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1290	if (min_prio < 0)
849	min_prio = 0;	1291	min_prio = 0;
850		1292
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1293	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (AvFILLp (coro_ready[prio]) >= 0)	1294	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1295	return av_shift (coro_ready [prio]);
856	}
857		1296
858	return 0;	1297	return 0;
859	}	1298	}
860		1299
861	static void	1300	static int
862	api_ready (SV *coro)	1301	api_ready (SV *coro_sv)
863	{	1302	{
864	dTHX;	1303	dTHX;
		1304	struct coro *coro;
865		1305
866	if (SvROK (coro))	1306	if (SvROK (coro_sv))
867	coro = SvRV (coro);	1307	coro_sv = SvRV (coro_sv);
		1308
		1309	coro = SvSTATE (coro_sv);
		1310
		1311	if (coro->flags & CF_READY)
		1312	return 0;
		1313
		1314	coro->flags |= CF_READY;
868		1315
869	LOCK;	1316	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1317	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1318	++coro_nready;
871	UNLOCK;	1319	UNLOCK;
		1320
		1321	return 1;
		1322	}
		1323
		1324	static int
		1325	api_is_ready (SV *coro_sv)
		1326	{
		1327	dTHX;
		1328	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1329	}
		1330
		1331	static void
		1332	prepare_schedule (pTHX_ struct transfer_args *ta)
		1333	{
		1334	SV *prev_sv, *next_sv;
		1335
		1336	for (;;)
		1337	{
		1338	LOCK;
		1339	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1340
		1341	/* nothing to schedule: call the idle handler */
		1342	if (expect_false (!next_sv))
		1343	{
		1344	dSP;
		1345	UNLOCK;
		1346
		1347	ENTER;
		1348	SAVETMPS;
		1349
		1350	PUSHMARK (SP);
		1351	PUTBACK;
		1352	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1353
		1354	FREETMPS;
		1355	LEAVE;
		1356	continue;
		1357	}
		1358
		1359	ta->next = SvSTATE (next_sv);
		1360
		1361	/* cannot transfer to destroyed coros, skip and look for next */
		1362	if (expect_false (ta->next->flags & CF_DESTROYED))
		1363	{
		1364	UNLOCK;
		1365	SvREFCNT_dec (next_sv);
		1366	/* coro_nready is already taken care of by destroy */
		1367	continue;
		1368	}
		1369
		1370	--coro_nready;
		1371	UNLOCK;
		1372	break;
		1373	}
		1374
		1375	/* free this only after the transfer */
		1376	prev_sv = SvRV (coro_current);
		1377	ta->prev = SvSTATE (prev_sv);
		1378	TRANSFER_CHECK (*ta);
		1379	assert (ta->next->flags & CF_READY);
		1380	ta->next->flags &= ~CF_READY;
		1381	SvRV_set (coro_current, next_sv);
		1382
		1383	LOCK;
		1384	free_coro_mortal (aTHX);
		1385	coro_mortal = prev_sv;
		1386	UNLOCK;
		1387	}
		1388
		1389	static void
		1390	prepare_cede (pTHX_ struct transfer_args *ta)
		1391	{
		1392	api_ready (coro_current);
		1393	prepare_schedule (aTHX_ ta);
		1394	}
		1395
		1396	static int
		1397	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1398	{
		1399	if (coro_nready)
		1400	{
		1401	SV *prev = SvRV (coro_current);
		1402	prepare_schedule (aTHX_ ta);
		1403	api_ready (prev);
		1404	return 1;
		1405	}
		1406	else
		1407	return 0;
872	}	1408	}
873		1409
874	static void	1410	static void
875	api_schedule (void)	1411	api_schedule (void)
876	{	1412	{
877	dTHX;	1413	dTHX;
		1414	struct transfer_args ta;
878		1415
879	SV *prev, *next;	1416	prepare_schedule (aTHX_ &ta);
880		1417	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}	1418	}
902		1419
903	static void	1420	static int
904	api_cede (void)	1421	api_cede (void)
905	{	1422	{
906	dTHX;	1423	dTHX;
		1424	struct transfer_args ta;
907		1425
908	LOCK;	1426	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1427
912	api_schedule ();	1428	if (expect_true (ta.prev != ta.next))
		1429	{
		1430	TRANSFER (ta);
		1431	return 1;
		1432	}
		1433	else
		1434	return 0;
913	}	1435	}
914		1436
		1437	static int
		1438	api_cede_notself (void)
		1439	{
		1440	dTHX;
		1441	struct transfer_args ta;
		1442
		1443	if (prepare_cede_notself (aTHX_ &ta))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
		1450	}
		1451
		1452	static void
		1453	api_trace (SV *coro_sv, int flags)
		1454	{
		1455	dTHX;
		1456	struct coro *coro = SvSTATE (coro_sv);
		1457
		1458	if (flags & CC_TRACE)
		1459	{
		1460	if (!coro->cctx)
		1461	coro->cctx = cctx_new ();
		1462	else if (!(coro->cctx->flags & CC_TRACE))
		1463	croak ("cannot enable tracing on coroutine with custom stack");
		1464
		1465	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1466	}
		1467	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1468	{
		1469	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1470
		1471	if (coro->flags & CF_RUNNING)
		1472	PL_runops = RUNOPS_DEFAULT;
		1473	else
		1474	coro->slot->runops = RUNOPS_DEFAULT;
		1475	}
		1476	}
		1477
915	MODULE = Coro::State PACKAGE = Coro::State	1478	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1479
917	PROTOTYPES: ENABLE	1480	PROTOTYPES: DISABLE
918		1481
919	BOOT:	1482	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1483	{
921	#ifdef USE_ITHREADS	1484	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1485	MUTEX_INIT (&coro_mutex);
923	#endif	1486	#endif
924	BOOT_PAGESIZE;	1487	BOOT_PAGESIZE;
925		1488
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1489	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1490	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1491
		1492	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1493	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1494
		1495	if (!PL_diehook) PL_diehook = SvREFCNT_inc (sv_diehook);
		1496	if (!PL_warnhook) PL_warnhook = SvREFCNT_inc (sv_warnhook);
		1497
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1498	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1499
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1500	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1501	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1502	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1503	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934		1504
935	main_mainstack = PL_mainstack;	1505	main_mainstack = PL_mainstack;
		1506	main_top_env = PL_top_env;
		1507
		1508	while (main_top_env->je_prev)
		1509	main_top_env = main_top_env->je_prev;
936		1510
937	coroapi.ver = CORO_API_VERSION;	1511	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1512	coroapi.transfer = api_transfer;
939	}
940		1513
941	Coro::State	1514	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1515	}
943	SV * args	1516
944	PROTOTYPE: $	1517	SV *
		1518	new (char *klass, ...)
945	CODE:	1519	CODE:
946	Coro__State coro;	1520	{
		1521	struct coro *coro;
		1522	HV *hv;
		1523	int i;
947		1524
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1525	Newz (0, coro, 1, struct coro);
		1526	coro->args = newAV ();
		1527	coro->flags = CF_NEW;
952		1528
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1529	if (coro_first) coro_first->prev = coro;
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1530	coro->next = coro_first;
955	/*coro->stack = 0;*/	1531	coro_first = coro;
956		1532
957	RETVAL = coro;	1533	coro->hv = hv = newHV ();
		1534	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1535	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1536
		1537	av_extend (coro->args, items - 1);
		1538	for (i = 1; i < items; i++)
		1539	av_push (coro->args, newSVsv (ST (i)));
		1540	}
958	OUTPUT:	1541	OUTPUT:
959	RETVAL	1542	RETVAL
960		1543
		1544	# these not obviously related functions are all rolled into the same xs
		1545	# function to increase chances that they all will call transfer with the same
		1546	# stack offset
961	void	1547	void
962	transfer(prev, next, flags)	1548	_set_stacklevel (...)
963	SV *prev	1549	ALIAS:
964	SV *next	1550	Coro::State::transfer = 1
965	int flags	1551	Coro::schedule = 2
966	PROTOTYPE: @	1552	Coro::cede = 3
		1553	Coro::cede_notself = 4
967	CODE:	1554	CODE:
968	PUTBACK;	1555	{
969	SV_CORO (next, "Coro::transfer");	1556	struct transfer_args ta;
970	SV_CORO (prev, "Coro::transfer");	1557
971	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1558	switch (ix)
972	SPAGAIN;	1559	{
		1560	case 0:
		1561	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1562	ta.next = 0;
		1563	break;
		1564
		1565	case 1:
		1566	if (items != 2)
		1567	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1568
		1569	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1570	break;
		1571
		1572	case 2:
		1573	prepare_schedule (aTHX_ &ta);
		1574	break;
		1575
		1576	case 3:
		1577	prepare_cede (aTHX_ &ta);
		1578	break;
		1579
		1580	case 4:
		1581	if (!prepare_cede_notself (aTHX_ &ta))
		1582	XSRETURN_EMPTY;
		1583
		1584	break;
		1585	}
		1586
		1587	BARRIER;
		1588	TRANSFER (ta);
		1589
		1590	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1591	XSRETURN_YES;
		1592	}
		1593
		1594	bool
		1595	_destroy (SV *coro_sv)
		1596	CODE:
		1597	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1598	OUTPUT:
		1599	RETVAL
973		1600
974	void	1601	void
975	DESTROY(coro)
976	Coro::State coro
977	CODE:
978
979	if (coro->mainstack && coro->mainstack != main_mainstack)
980	{
981	struct coro temp;
982
983	PUTBACK;
984	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
985	LOAD (aTHX_ coro);
986	SPAGAIN;
987
988	destroy_stacks (aTHX);
989
990	LOAD ((&temp)); /* this will get rid of defsv etc.. */
991	SPAGAIN;
992
993	coro->mainstack = 0;
994	}
995
996	deallocate_stack (coro);
997	SvREFCNT_dec (coro->args);
998	Safefree (coro);
999
1000	void
1001	_exit(code)	1602	_exit (code)
1002	int code	1603	int code
1003	PROTOTYPE: $	1604	PROTOTYPE: $
1004	CODE:	1605	CODE:
1005	_exit (code);	1606	_exit (code);
1006		1607
1007	MODULE = Coro::State PACKAGE = Coro::Cont	1608	int
		1609	cctx_stacksize (int new_stacksize = 0)
		1610	CODE:
		1611	RETVAL = coro_stacksize;
		1612	if (new_stacksize)
		1613	coro_stacksize = new_stacksize;
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	int
		1618	cctx_count ()
		1619	CODE:
		1620	RETVAL = cctx_count;
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	int
		1625	cctx_idle ()
		1626	CODE:
		1627	RETVAL = cctx_idle;
		1628	OUTPUT:
		1629	RETVAL
1008		1630
1009	void	1631	void
1010	yield(...)	1632	list ()
1011	PROTOTYPE: @	1633	PPCODE:
		1634	{
		1635	struct coro *coro;
		1636	for (coro = coro_first; coro; coro = coro->next)
		1637	if (coro->hv)
		1638	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1639	}
		1640
		1641	void
		1642	call (Coro::State coro, SV *coderef)
		1643	ALIAS:
		1644	eval = 1
		1645	CODE:
		1646	{
		1647	if (coro->mainstack)
		1648	{
		1649	struct coro temp;
		1650
		1651	if (!(coro->flags & CF_RUNNING))
		1652	{
		1653	save_perl (aTHX_ &temp);
		1654	load_perl (aTHX_ coro);
		1655	}
		1656
		1657	{
		1658	dSP;
		1659	ENTER;
		1660	SAVETMPS;
		1661	PUSHMARK (SP);
		1662	PUTBACK;
		1663
		1664	if (ix)
		1665	eval_sv (coderef, 0);
		1666	else
		1667	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1668
		1669	SPAGAIN;
		1670	FREETMPS;
		1671	LEAVE;
		1672	PUTBACK;
		1673	}
		1674
		1675	if (!(coro->flags & CF_RUNNING))
		1676	{
		1677	save_perl (aTHX_ coro);
		1678	load_perl (aTHX_ &temp);
		1679	}
		1680	}
		1681	}
		1682
		1683	SV *
		1684	is_ready (Coro::State coro)
		1685	PROTOTYPE: $
		1686	ALIAS:
		1687	is_ready = CF_READY
		1688	is_running = CF_RUNNING
		1689	is_new = CF_NEW
		1690	is_destroyed = CF_DESTROYED
		1691	CODE:
		1692	RETVAL = boolSV (coro->flags & ix);
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	void
		1697	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1698
		1699	SV *
		1700	has_stack (Coro::State coro)
		1701	PROTOTYPE: $
		1702	CODE:
		1703	RETVAL = boolSV (!!coro->cctx);
		1704	OUTPUT:
		1705	RETVAL
		1706
		1707	int
		1708	is_traced (Coro::State coro)
		1709	PROTOTYPE: $
		1710	CODE:
		1711	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1712	OUTPUT:
		1713	RETVAL
		1714
		1715	IV
		1716	rss (Coro::State coro)
		1717	PROTOTYPE: $
		1718	ALIAS:
		1719	usecount = 1
1012	CODE:	1720	CODE:
1013	SV *yieldstack;	1721	switch (ix)
1014	SV *sv;	1722	{
1015	AV *defav = GvAV (PL_defgv);	1723	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1016	struct coro *prev, *next;	1724	case 1: RETVAL = coro->usecount; break;
1017
1018	yieldstack = *hv_fetch (
1019	(HV *)SvRV (GvSV (coro_current)),
1020	"yieldstack", sizeof ("yieldstack") - 1,
1021	0	1725	}
1022	);	1726	OUTPUT:
		1727	RETVAL
1023		1728
1024	/* set up @_ -- ugly */
1025	av_clear (defav);
1026	av_fill (defav, items - 1);
1027	while (items--)
1028	av_store (defav, items, SvREFCNT_inc (ST(items)));
1029
1030	sv = av_pop ((AV *)SvRV (yieldstack));
1031	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1032	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1033	SvREFCNT_dec (sv);
1034
1035	transfer (aTHX_ prev, next, 0);
1036		1729
1037	MODULE = Coro::State PACKAGE = Coro	1730	MODULE = Coro::State PACKAGE = Coro
1038		1731
1039	BOOT:	1732	BOOT:
1040	{	1733	{
1041	int i;	1734	int i;
		1735
		1736	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1737	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1738	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1739
		1740	coro_current = coro_get_sv ("Coro::current", FALSE);
		1741	SvREADONLY_on (coro_current);
		1742
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1743	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1744
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1745	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1746	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1747	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1748	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1749	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1750	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053		1751
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1752	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1753	coro_ready[i] = newAV ();
1056		1754
1057	{	1755	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1756	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1757	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1059		1758
1060	coroapi.schedule = api_schedule;	1759	coroapi.schedule = api_schedule;
1061	coroapi.cede = api_cede;	1760	coroapi.cede = api_cede;
		1761	coroapi.cede_notself = api_cede_notself;
1062	coroapi.ready = api_ready;	1762	coroapi.ready = api_ready;
		1763	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1764	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1765	coroapi.current = coro_current;
1065		1766
1066	GCoroAPI = &coroapi;	1767	GCoroAPI = &coroapi;
1067	sv_setiv (sv, (IV)&coroapi);	1768	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on (sv);	1769	SvREADONLY_on (sv);
1069	}	1770	}
1070	}	1771	}
1071		1772
1072	#if !PERL_MICRO
1073
1074	void	1773	void
1075	ready(self)	1774	_set_current (SV *current)
1076	SV * self
1077	PROTOTYPE: $	1775	PROTOTYPE: $
1078	CODE:	1776	CODE:
1079	api_ready (self);	1777	SvREFCNT_dec (SvRV (coro_current));
1080		1778	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1081	#endif
1082		1779
1083	int	1780	int
		1781	prio (Coro::State coro, int newprio = 0)
		1782	ALIAS:
		1783	nice = 1
		1784	CODE:
		1785	{
		1786	RETVAL = coro->prio;
		1787
		1788	if (items > 1)
		1789	{
		1790	if (ix)
		1791	newprio = coro->prio - newprio;
		1792
		1793	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1794	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1795
		1796	coro->prio = newprio;
		1797	}
		1798	}
		1799	OUTPUT:
		1800	RETVAL
		1801
		1802	SV *
		1803	ready (SV *self)
		1804	PROTOTYPE: $
		1805	CODE:
		1806	RETVAL = boolSV (api_ready (self));
		1807	OUTPUT:
		1808	RETVAL
		1809
		1810	int
1084	nready(...)	1811	nready (...)
1085	PROTOTYPE:	1812	PROTOTYPE:
1086	CODE:	1813	CODE:
1087	RETVAL = coro_nready;	1814	RETVAL = coro_nready;
1088	OUTPUT:	1815	OUTPUT:
1089	RETVAL	1816	RETVAL
1090		1817
1091	void	1818	void
1092	schedule(...)	1819	throw (Coro::State self, SV *throw = &PL_sv_undef)
1093	PROTOTYPE:	1820	PROTOTYPE: $;$
		1821	CODE:
		1822	SvREFCNT_dec (self->throw);
		1823	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1824
		1825	# for async_pool speedup
		1826	void
		1827	_pool_1 (SV *cb)
1094	CODE:	1828	CODE:
1095	api_schedule ();	1829	{
		1830	struct coro *coro = SvSTATE (coro_current);
		1831	HV *hv = (HV *)SvRV (coro_current);
		1832	AV *defav = GvAV (PL_defgv);
		1833	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1834	AV *invoke_av;
		1835	int i, len;
		1836
		1837	if (!invoke)
		1838	croak ("\3async_pool terminate\2\n");
		1839
		1840	SvREFCNT_dec (coro->saved_deffh);
		1841	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1842
		1843	hv_store (hv, "desc", sizeof ("desc") - 1,
		1844	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1845
		1846	invoke_av = (AV *)SvRV (invoke);
		1847	len = av_len (invoke_av);
		1848
		1849	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1850
		1851	if (len > 0)
		1852	{
		1853	av_fill (defav, len - 1);
		1854	for (i = 0; i < len; ++i)
		1855	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1856	}
		1857
		1858	SvREFCNT_dec (invoke);
		1859	}
1096		1860
1097	void	1861	void
1098	cede(...)	1862	_pool_2 (SV *cb)
1099	PROTOTYPE:
1100	CODE:	1863	CODE:
1101	api_cede ();	1864	{
		1865	struct coro *coro = SvSTATE (coro_current);
1102		1866
1103	# and these are hacks	1867	sv_setsv (cb, &PL_sv_undef);
		1868
		1869	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1870	coro->saved_deffh = 0;
		1871
		1872	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1873	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1874	croak ("\3async_pool terminate\2\n");
		1875
		1876	av_clear (GvAV (PL_defgv));
		1877	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1878	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1879
		1880	coro->prio = 0;
		1881
		1882	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1883	api_trace (coro_current, 0);
		1884
		1885	av_push (av_async_pool, newSVsv (coro_current));
		1886	}
		1887
		1888
		1889	MODULE = Coro::State PACKAGE = Coro::AIO
		1890
1104	SV *	1891	SV *
1105	_aio_get_state ()	1892	_get_state ()
1106	CODE:	1893	CODE:
1107	{	1894	{
1108	struct {	1895	struct io_state *data;
1109	int errorno;
1110	int laststype;
1111	int laststatval;
1112	Stat_t statcache;
1113	} data;
1114		1896
		1897	RETVAL = newSV (sizeof (struct io_state));
		1898	data = (struct io_state *)SvPVX (RETVAL);
		1899	SvCUR_set (RETVAL, sizeof (struct io_state));
		1900	SvPOK_only (RETVAL);
		1901
1115	data.errorno = errno;	1902	data->errorno = errno;
1116	data.laststype = PL_laststype;	1903	data->laststype = PL_laststype;
1117	data.laststatval = PL_laststatval;	1904	data->laststatval = PL_laststatval;
1118	data.statcache = PL_statcache;	1905	data->statcache = PL_statcache;
1119
1120	RETVAL = newSVpvn ((char *)&data, sizeof data);
1121	}	1906	}
1122	OUTPUT:	1907	OUTPUT:
1123	RETVAL	1908	RETVAL
1124		1909
1125	void	1910	void
1126	_aio_set_state (char *data_)	1911	_set_state (char *data_)
1127	PROTOTYPE: $	1912	PROTOTYPE: $
1128	CODE:	1913	CODE:
1129	{	1914	{
1130	struct {	1915	struct io_state *data = (void *)data_;
1131	int errorno;
1132	int laststype;
1133	int laststatval;
1134	Stat_t statcache;
1135	} *data = (void *)data_;
1136		1916
1137	errno = data->errorno;	1917	errno = data->errorno;
1138	PL_laststype = data->laststype;	1918	PL_laststype = data->laststype;
1139	PL_laststatval = data->laststatval;	1919	PL_laststatval = data->laststatval;
1140	PL_statcache = data->statcache;	1920	PL_statcache = data->statcache;
1141	}	1921	}
		1922

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