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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.206 by root, Tue Oct 9 15:45:26 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	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
		138	struct io_state
		139	{
		140	int errorno;
		141	I32 laststype;
		142	int laststatval;
		143	Stat_t statcache;
		144	};
		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
85	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	148	static AV *main_mainstack; /* used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
87	static HV *coro_state_stash;	150	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 */	151	static SV *coro_mortal; /* will be freed after next transfer */
91		152
92	/* this is actually not only the c stack but also c registers etc... */	153	static GV *irsgv; /* $/ */
		154	static GV *stdoutgv; /* *STDOUT */
		155
		156	static HV *hv_sig; /* %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
		165	static struct coro_cctx *cctx_first;
		166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		175	};
		176
		177	/* this is a structure representing a c-level coroutine */
		178	typedef struct coro_cctx {
		179	struct coro_cctx *next;
		180
		181	/* the stack */
		182	void *sptr;
		183	size_t ssize;
		184
		185	/* cpu state */
		186	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		187	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		188	JMPENV *top_env;
		189	coro_context cctx;
		190
		191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
		196
		197	enum {
		198	CF_RUNNING = 0x0001, /* coroutine is running */
		199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
93	typedef struct {	205	typedef struct {
94	int refcnt; /* pointer reference counter */	206	SV *defsv;
95	int usecnt; /* shared by how many coroutines */	207	AV *defav;
96	int gencnt; /* generation counter */	208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
97		214
98	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99		216
100	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
101	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103
104	struct coro {	218	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	219	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	220	coro_cctx *cctx;
107		221
108	/* the optional C context */	222	/* process data */
109	coro_stack *stack;
110	void *cursp;
111	int gencnt;
112
113	/* optionally saved, might be zero */
114	AV *defav;
115	SV *defsv;
116	SV *errsv;
117
118	/* saved global state not related to stacks */
119	U8 dowarn;
120	I32 in_eval;
121
122	/* the stacks and related info (callchain etc..) */
123	PERL_SI *curstackinfo;
124	AV *curstack;
125	AV *mainstack;	223	AV *mainstack;
126	SV **stack_sp;	224	perl_slots *slot; /* basically the saved sp */
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152		225
153	/* data associated with this coroutine (initial args) */	226	AV *args; /* data associated with this coroutine (initial args) */
154	AV *args;	227	int refcnt; /* coroutines are refcounted, yes */
		228	int flags; /* CF_ flags */
		229	HV *hv; /* the perl hash associated with this coro, if any */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV *throw; /* exception to be thrown */
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
155	};	243	};
156		244
157	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
159		247
		248	/** Coro ********************************************************************/
		249
		250	#define PRIO_MAX 3
		251	#define PRIO_HIGH 1
		252	#define PRIO_NORMAL 0
		253	#define PRIO_LOW -1
		254	#define PRIO_IDLE -3
		255	#define PRIO_MIN -4
		256
		257	/* for Coro.pm */
		258	static SV *coro_current;
		259	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		260	static int coro_nready;
		261	static struct coro *coro_first;
		262
		263	/** lowlevel stuff **********************************************************/
		264
		265	static SV *
		266	coro_get_sv (const char *name, int create)
		267	{
		268	#if PERL_VERSION_ATLEAST (5,9,0)
		269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		270	get_sv (name, create);
		271	#endif
		272	return get_sv (name, create);
		273	}
		274
		275	static AV *
		276	coro_get_av (const char *name, int create)
		277	{
		278	#if PERL_VERSION_ATLEAST (5,9,0)
		279	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		280	get_av (name, create);
		281	#endif
		282	return get_av (name, create);
		283	}
		284
		285	static HV *
		286	coro_get_hv (const char *name, int create)
		287	{
		288	#if PERL_VERSION_ATLEAST (5,9,0)
		289	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		290	get_hv (name, create);
		291	#endif
		292	return get_hv (name, create);
		293	}
		294
160	static AV *	295	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	296	coro_clone_padlist (pTHX_ CV *cv)
162	{	297	{
163	AV *padlist = CvPADLIST (cv);	298	AV *padlist = CvPADLIST (cv);
164	AV *newpadlist, *newpad;	299	AV *newpadlist, *newpad;
165		300
166	newpadlist = newAV ();	301	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	302	AvREAL_off (newpadlist);
168	#if PERL_VERSION < 9	303	#if PERL_VERSION_ATLEAST (5,9,0)
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		305	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172	#endif	307	#endif
173	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	308	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174	--AvFILLp (padlist);	309	--AvFILLp (padlist);
175		310
176	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	311	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
220		355
221	#define PERL_MAGIC_coro PERL_MAGIC_ext	356	#define PERL_MAGIC_coro PERL_MAGIC_ext
222		357
223	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	358	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224		359
		360	#define CORO_MAGIC(cv) \
		361	SvMAGIC (cv) \
		362	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		363	? SvMAGIC (cv) \
		364	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		365	: 0
		366
		367	static struct coro *
		368	SvSTATE_ (pTHX_ SV *coro)
		369	{
		370	HV *stash;
		371	MAGIC *mg;
		372
		373	if (SvROK (coro))
		374	coro = SvRV (coro);
		375
		376	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		377	croak ("Coro::State object required");
		378
		379	stash = SvSTASH (coro);
		380	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		381	{
		382	/* very slow, but rare, check */
		383	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		384	croak ("Coro::State object required");
		385	}
		386
		387	mg = CORO_MAGIC (coro);
		388	return (struct coro *)mg->mg_ptr;
		389	}
		390
		391	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		392
225	/* the next two functions merely cache the padlists */	393	/* the next two functions merely cache the padlists */
226	static void	394	static void
227	get_padlist (pTHX_ CV *cv)	395	get_padlist (pTHX_ CV *cv)
228	{	396	{
229	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	397	MAGIC *mg = CORO_MAGIC (cv);
		398	AV *av;
230		399
231	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
232	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233	else	402	else
234	{	403	{
235	#if 0	404	#if CORO_PREFER_PERL_FUNCTIONS
236	/* this should work - but it doesn't :( */	405	/* this is probably cleaner, but also slower? */
237	CV *cp = Perl_cv_clone (aTHX_ cv);	406	CV *cp = Perl_cv_clone (cv);
238	CvPADLIST (cv) = CvPADLIST (cp);	407	CvPADLIST (cv) = CvPADLIST (cp);
239	CvPADLIST (cp) = 0;	408	CvPADLIST (cp) = 0;
240	SvREFCNT_dec (cp);	409	SvREFCNT_dec (cp);
241	#else	410	#else
242	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
245	}	414	}
246		415
247	static void	416	static void
248	put_padlist (pTHX_ CV *cv)	417	put_padlist (pTHX_ CV *cv)
249	{	418	{
250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	419	MAGIC *mg = CORO_MAGIC (cv);
		420	AV *av;
251		421
252	if (!mg)	422	if (expect_false (!mg))
253	{	423	{
254	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256	mg->mg_virtual = &vtbl_coro;	426	mg->mg_virtual = &vtbl_coro;
257	mg->mg_obj = (SV *)newAV ();	427	mg->mg_obj = (SV *)newAV ();
258	}	428	}
259		429
260	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	430	av = (AV *)mg->mg_obj;
261	}
262		431
263	#define SB do {	432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
264	#define SE } while (0)	433	av_extend (av, AvMAX (av) + 1);
265		434
266	#define LOAD(state) load_state(aTHX_ (state));	435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
267	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	436	}
268		437
269	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	438	/** load & save, init *******************************************************/
270		439
271	static void	440	static void
272	load_state(pTHX_ Coro__State c)	441	load_perl (pTHX_ Coro__State c)
273	{	442	{
274	PL_dowarn = c->dowarn;	443	perl_slots *slot = c->slot;
275	PL_in_eval = c->in_eval;	444	c->slot = 0;
276		445
277	PL_curstackinfo = c->curstackinfo;
278	PL_curstack = c->curstack;
279	PL_mainstack = c->mainstack;	446	PL_mainstack = c->mainstack;
280	PL_stack_sp = c->stack_sp;
281	PL_op = c->op;
282	PL_curpad = c->curpad;
283	PL_comppad = c->comppad;
284	PL_compcv = c->compcv;
285	PL_stack_base = c->stack_base;
286	PL_stack_max = c->stack_max;
287	PL_tmps_stack = c->tmps_stack;
288	PL_tmps_floor = c->tmps_floor;
289	PL_tmps_ix = c->tmps_ix;
290	PL_tmps_max = c->tmps_max;
291	PL_markstack = c->markstack;
292	PL_markstack_ptr = c->markstack_ptr;
293	PL_markstack_max = c->markstack_max;
294	PL_scopestack = c->scopestack;
295	PL_scopestack_ix = c->scopestack_ix;
296	PL_scopestack_max = c->scopestack_max;
297	PL_savestack = c->savestack;
298	PL_savestack_ix = c->savestack_ix;
299	PL_savestack_max = c->savestack_max;
300	#if PERL_VERSION < 9
301	PL_retstack = c->retstack;
302	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;
304	#endif
305	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308		447
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	448	GvSV (PL_defgv) = slot->defsv;
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	449	GvAV (PL_defgv) = slot->defav;
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	450	GvSV (PL_errgv) = slot->errsv;
		451	GvSV (irsgv) = slot->irsgv;
		452
		453	#define VAR(name,type) PL_ ## name = slot->name;
		454	# include "state.h"
		455	#undef VAR
		456
		457	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
		458	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
312		459
313	{	460	{
314	dSP;	461	dSP;
		462
315	CV *cv;	463	CV *cv;
316		464
317	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
319	{	467	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
326	}	470	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	471	}
330		472
331	PUTBACK;	473	PUTBACK;
332	}	474	}
333	}	475	}
334		476
335	static void	477	static void
336	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
337	{	479	{
338	{	480	{
339	dSP;	481	dSP;
340	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	486	/*
345	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
346	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
347	*/	489	*/
348		490
349	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
351	for (;;)	493	for (;;)
352	{	494	{
353	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
354	{	496	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
356		498
357	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
358	{	500	{
359	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
360	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
361	{	504	{
362	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
373		509
		510	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
375	}	512	}
376	}	513	}
377	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)
379	{
380	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}
384	#endif
385	}	514	}
386		515
387	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
388	break;	517	break;
389		518
390	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
391	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
392	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
393	}	522	}
394		523
395	PUTBACK;	524	PUTBACK;
396	}	525	}
397		526
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
401		538
402	c->dowarn = PL_dowarn;
403	c->in_eval = PL_in_eval;
404
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;	540
409	c->op = PL_op;	541	{
410	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411	c->comppad = PL_comppad;	543
412	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
413	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
414	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
415	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
416	c->tmps_floor = PL_tmps_floor;	548
417	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
418	c->tmps_max = PL_tmps_max;	550	# include "state.h"
419	c->markstack = PL_markstack;	551	#undef VAR
420	c->markstack_ptr = PL_markstack_ptr;	552	}
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
436	}	553	}
437		554
438	/*	555	/*
439	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
443	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
444	static void	564	static void
445	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
446	{	566	{
447	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		571
454	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		575
458	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
459	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	579	PL_tmps_max = 32;
462		580
463	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
466		584
467	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
469	#endif	587	#endif
470		588
471	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
472	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
474		592
475	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
476	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	595	PL_savestack_max = 24;
478		596
479	#if PERL_VERSION < 9	597	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	600	PL_retstack_max = 4;
483	#endif	601	#endif
484
485	UNLOCK;
486	}	602	}
		603	#endif
487		604
488	/*	605	/*
489	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
490	*/	607	*/
491	static void	608	static void
492	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
493	{	610	{
494	if (!IN_DESTRUCT)
495	{
496	/* is this ugly, I ask? */
497	LEAVE_SCOPE (0);
498
499	/* sure it is, but more important: is it correct?? :/ */
500	FREETMPS;
501
502	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503	}
504
505	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
507		613
508	while (PL_curstackinfo)	614	while (PL_curstackinfo)
509	{	615	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
511		617
512	{ /*D*//*remove*/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		620
524	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	623	PL_curstackinfo = p;
527	}	624	}
528		625
529	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	627	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	629	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	630	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	631	Safefree (PL_retstack);
535	#endif	632	#endif
536	}	633	}
537		634
538	static void	635	static size_t
539	allocate_stack (Coro__State ctx, int alloc)	636	coro_rss (pTHX_ struct coro *coro)
540	{	637	{
541	coro_stack *stack;	638	size_t rss = sizeof (*coro);
542		639
543	New (0, stack, 1, coro_stack);	640	if (coro->mainstack)
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{	641	{
551	#if HAVE_MMAP	642	perl_slots tmp_slot;
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	643	perl_slots *slot;
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	644
554	if (stack->sptr != (void *)-1)	645	if (coro->flags & CF_RUNNING)
555	{	646	{
556	# if STACKGUARD	647	slot = &tmp_slot;
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	648
558	# endif	649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
559	}	652	}
560	else	653	else
561	#endif	654	slot = coro->slot;
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569		655
570	ctx->stack = stack;	656	rss += sizeof (slot->curstackinfo);
571	}	657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
572		663
573	static void	664	#if !PERL_VERSION_ATLEAST (5,9,0)
574	deallocate_stack (Coro__State ctx)	665	rss += slot->retstack_max * sizeof (OP *);
575	{	666	#endif
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{	667	}
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590		668
591	Safefree (stack);	669	return rss;
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}	670	}
597		671
		672	/** coroutine stack handling ************************************************/
		673
598	static void	674	static void
599	setup_coro (void *arg)	675	coro_setup (pTHX_ struct coro *coro)
600	{	676	{
601	/*	677	/*
602	* emulate part of the perl startup here.	678	* emulate part of the perl startup here.
603	*/	679	*/
		680	coro_init_stacks (aTHX);
		681
		682	PL_runops = RUNOPS_DEFAULT;
		683	PL_curcop = &PL_compiling;
		684	PL_in_eval = EVAL_NULL;
		685	PL_comppad = 0;
		686	PL_curpm = 0;
		687	PL_curpad = 0;
		688	PL_localizing = 0;
		689	PL_dirty = 0;
		690	PL_restartop = 0;
		691	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		692	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		693
		694	GvSV (PL_defgv) = newSV (0);
		695	GvAV (PL_defgv) = coro->args; coro->args = 0;
		696	GvSV (PL_errgv) = newSV (0);
		697	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		698	PL_rs = newSVsv (GvSV (irsgv));
		699	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		700
		701	{
		702	dSP;
		703	LOGOP myop;
		704
		705	Zero (&myop, 1, LOGOP);
		706	myop.op_next = Nullop;
		707	myop.op_flags = OPf_WANT_VOID;
		708
		709	PUSHMARK (SP);
		710	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		711	PUTBACK;
		712	PL_op = (OP *)&myop;
		713	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		714	SPAGAIN;
		715	}
		716
		717	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		718	}
		719
		720	static void
		721	coro_destroy (pTHX_ struct coro *coro)
		722	{
		723	if (!IN_DESTRUCT)
		724	{
		725	/* restore all saved variables and stuff */
		726	LEAVE_SCOPE (0);
		727	assert (PL_tmps_floor == -1);
		728
		729	/* free all temporaries */
		730	FREETMPS;
		731	assert (PL_tmps_ix == -1);
		732
		733	/* unwind all extra stacks */
		734	POPSTACK_TO (PL_mainstack);
		735
		736	/* unwind main stack */
		737	dounwind (-1);
		738	}
		739
		740	SvREFCNT_dec (GvSV (PL_defgv));
		741	SvREFCNT_dec (GvAV (PL_defgv));
		742	SvREFCNT_dec (GvSV (PL_errgv));
		743	SvREFCNT_dec (PL_defoutgv);
		744	SvREFCNT_dec (PL_rs);
		745	SvREFCNT_dec (GvSV (irsgv));
		746
		747	SvREFCNT_dec (PL_diehook);
		748	SvREFCNT_dec (PL_warnhook);
		749
		750	SvREFCNT_dec (coro->saved_deffh);
		751	SvREFCNT_dec (coro->throw);
		752
		753	coro_destroy_stacks (aTHX);
		754	}
		755
		756	static void
		757	free_coro_mortal (pTHX)
		758	{
		759	if (expect_true (coro_mortal))
		760	{
		761	SvREFCNT_dec (coro_mortal);
		762	coro_mortal = 0;
		763	}
		764	}
		765
		766	static int
		767	runops_trace (pTHX)
		768	{
		769	COP *oldcop = 0;
		770	int oldcxix = -2;
		771	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		772	coro_cctx *cctx = coro->cctx;
		773
		774	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		775	{
		776	PERL_ASYNC_CHECK ();
		777
		778	if (cctx->flags & CC_TRACE_ALL)
		779	{
		780	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		781	{
		782	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		783	SV **bot, **top;
		784	AV *av = newAV (); /* return values */
		785	SV **cb;
		786	dSP;
		787
		788	GV *gv = CvGV (cx->blk_sub.cv);
		789	SV *fullname = sv_2mortal (newSV (0));
		790	if (isGV (gv))
		791	gv_efullname3 (fullname, gv, 0);
		792
		793	bot = PL_stack_base + cx->blk_oldsp + 1;
		794	top = cx->blk_gimme == G_ARRAY ? SP + 1
		795	: cx->blk_gimme == G_SCALAR ? bot + 1
		796	: bot;
		797
		798	av_extend (av, top - bot);
		799	while (bot < top)
		800	av_push (av, SvREFCNT_inc (*bot++));
		801
		802	PL_runops = RUNOPS_DEFAULT;
		803	ENTER;
		804	SAVETMPS;
		805	EXTEND (SP, 3);
		806	PUSHMARK (SP);
		807	PUSHs (&PL_sv_no);
		808	PUSHs (fullname);
		809	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		810	PUTBACK;
		811	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		812	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		813	SPAGAIN;
		814	FREETMPS;
		815	LEAVE;
		816	PL_runops = runops_trace;
		817	}
		818
		819	if (oldcop != PL_curcop)
		820	{
		821	oldcop = PL_curcop;
		822
		823	if (PL_curcop != &PL_compiling)
		824	{
		825	SV **cb;
		826
		827	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		828	{
		829	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		830
		831	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		832	{
		833	runops_proc_t old_runops = PL_runops;
		834	dSP;
		835	GV *gv = CvGV (cx->blk_sub.cv);
		836	SV *fullname = sv_2mortal (newSV (0));
		837
		838	if (isGV (gv))
		839	gv_efullname3 (fullname, gv, 0);
		840
		841	PL_runops = RUNOPS_DEFAULT;
		842	ENTER;
		843	SAVETMPS;
		844	EXTEND (SP, 3);
		845	PUSHMARK (SP);
		846	PUSHs (&PL_sv_yes);
		847	PUSHs (fullname);
		848	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		849	PUTBACK;
		850	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		851	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		852	SPAGAIN;
		853	FREETMPS;
		854	LEAVE;
		855	PL_runops = runops_trace;
		856	}
		857
		858	oldcxix = cxstack_ix;
		859	}
		860
		861	if (cctx->flags & CC_TRACE_LINE)
		862	{
		863	dSP;
		864
		865	PL_runops = RUNOPS_DEFAULT;
		866	ENTER;
		867	SAVETMPS;
		868	EXTEND (SP, 3);
		869	PL_runops = RUNOPS_DEFAULT;
		870	PUSHMARK (SP);
		871	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		872	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		873	PUTBACK;
		874	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		875	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		876	SPAGAIN;
		877	FREETMPS;
		878	LEAVE;
		879	PL_runops = runops_trace;
		880	}
		881	}
		882	}
		883	}
		884	}
		885
		886	TAINT_NOT;
		887	return 0;
		888	}
		889
		890	/* inject a fake call to Coro::State::_cctx_init into the execution */
		891	/* _cctx_init should be careful, as it could be called at almost any time */
		892	/* during execution of a perl program */
		893	static void NOINLINE
		894	cctx_prepare (pTHX_ coro_cctx *cctx)
		895	{
		896	dSP;
		897	LOGOP myop;
		898
		899	PL_top_env = &PL_start_env;
		900
		901	if (cctx->flags & CC_TRACE)
		902	PL_runops = runops_trace;
		903
		904	Zero (&myop, 1, LOGOP);
		905	myop.op_next = PL_op;
		906	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		907
		908	PUSHMARK (SP);
		909	EXTEND (SP, 2);
		910	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		911	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		912	PUTBACK;
		913	PL_op = (OP *)&myop;
		914	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		915	SPAGAIN;
		916	}
		917
		918	/*
		919	* this is a _very_ stripped down perl interpreter ;)
		920	*/
		921	static void
		922	cctx_run (void *arg)
		923	{
604	dTHX;	924	dTHX;
605	dSP;
606	Coro__State ctx = (Coro__State)arg;
607	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608		925
609	coro_init_stacks (aTHX);	926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
610	/*PL_curcop = 0;*/	927	UNLOCK;
611	/*PL_in_eval = PL_in_eval;*/ /* inherit */
612	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
614		928
615	SPAGAIN;	929	/* we now skip the entersub that lead to transfer() */
		930	PL_op = PL_op->op_next;
616		931
617	if (ctx->stack)	932	/* inject a fake subroutine call to cctx_init */
618	{	933	cctx_prepare (aTHX_ (coro_cctx *)arg);
619	ctx->cursp = 0;
620		934
621	PUSHMARK(SP);	935	/* somebody or something will hit me for both perl_run and PL_restartop */
622	PUTBACK;	936	PL_restartop = PL_op;
623	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	937	perl_run (PL_curinterp);
624		938
625	if (SvTRUE (ERRSV))	939	/*
626	croak (NULL);	940	* If perl-run returns we assume exit() was being called or the coro
627	else	941	* fell off the end, which seems to be the only valid (non-bug)
628	croak ("FATAL: CCTXT coroutine returned!");	942	* reason for perl_run to return. We try to exit by jumping to the
		943	* bootstrap-time "top" top_env, as we cannot restore the "main"
		944	* coroutine as Coro has no such concept
		945	*/
		946	PL_top_env = main_top_env;
		947	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		948	}
		949
		950	static coro_cctx *
		951	cctx_new ()
		952	{
		953	coro_cctx *cctx;
		954	void *stack_start;
		955	size_t stack_size;
		956
		957	++cctx_count;
		958
		959	Newz (0, cctx, 1, coro_cctx);
		960
		961	#if HAVE_MMAP
		962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		963	/* mmap supposedly does allocate-on-write for us */
		964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		965
		966	if (cctx->sptr != (void *)-1)
		967	{
		968	# if CORO_STACKGUARD
		969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags |= CC_MAPPED;
629	}	974	}
630	else	975	else
631	{	976	#endif
632	UNOP myop;
633
634	Zero(&myop, 1, UNOP);
635	myop.op_next = Nullop;
636	myop.op_flags = OPf_WANT_VOID;
637
638	PL_op = (OP *)&myop;
639
640	PUSHMARK(SP);
641	XPUSHs (sub_init);
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;
652
653	ENTER; /* necessary e.g. for dounwind */
654	}	977	{
655	}	978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
656		980
657	static void	981	if (!cctx->sptr)
658	continue_coro (void *arg)	982	{
659	{	983	perror ("FATAL: unable to allocate stack for coroutine");
660	/*	984	_exit (EXIT_FAILURE);
661	* this is a _very_ stripped down perl interpreter ;)	985	}
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665		986
666	PL_top_env = &ctx->start_env;	987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
667		990
668	ctx->cursp = 0;	991	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
669	PL_op = PL_op->op_next;	992	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
670	CALLRUNOPS(aTHX);
671		993
672	abort ();	994	return cctx;
673	}	995	}
674		996
675	static void	997	static void
		998	cctx_destroy (coro_cctx *cctx)
		999	{
		1000	if (!cctx)
		1001	return;
		1002
		1003	--cctx_count;
		1004
		1005	#if CORO_USE_VALGRIND
		1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1007	#endif
		1008
		1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
		1011	munmap (cctx->sptr, cctx->ssize);
		1012	else
		1013	#endif
		1014	Safefree (cctx->sptr);
		1015
		1016	Safefree (cctx);
		1017	}
		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1021
		1022	static coro_cctx *
		1023	cctx_get (pTHX)
		1024	{
		1025	while (expect_true (cctx_first))
		1026	{
		1027	coro_cctx *cctx = cctx_first;
		1028	cctx_first = cctx->next;
		1029	--cctx_idle;
		1030
		1031	if (expect_true (!CCTX_EXPIRED (cctx)))
		1032	return cctx;
		1033
		1034	cctx_destroy (cctx);
		1035	}
		1036
		1037	return cctx_new ();
		1038	}
		1039
		1040	static void
		1041	cctx_put (coro_cctx *cctx)
		1042	{
		1043	/* free another cctx if overlimit */
		1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1045	{
		1046	coro_cctx *first = cctx_first;
		1047	cctx_first = first->next;
		1048	--cctx_idle;
		1049
		1050	cctx_destroy (first);
		1051	}
		1052
		1053	++cctx_idle;
		1054	cctx->next = cctx_first;
		1055	cctx_first = cctx;
		1056	}
		1057
		1058	/** coroutine switching *****************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
		1077	#else
		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
		1079	#endif
		1080	)
		1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1082	}
		1083	}
		1084
		1085	/* always use the TRANSFER macro */
		1086	static void NOINLINE
676	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	1087	transfer (pTHX_ struct coro *prev, struct coro *next)
677	{	1088	{
678	dSTACKLEVEL;	1089	dSTACKLEVEL;
679		1090
680	if (prev != next)	1091	/* sometimes transfer is only called to set idle_sp */
		1092	if (expect_false (!next))
		1093	{
		1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1095	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
681	{	1096	}
682	if (next->mainstack)	1097	else if (expect_true (prev != next))
		1098	{
		1099	coro_cctx *prev__cctx;
		1100
		1101	if (expect_false (prev->flags & CF_NEW))
683	{	1102	{
684	LOCK;	1103	/* create a new empty context */
685	SAVE (prev, flags);	1104	Newz (0, prev->cctx, 1, coro_cctx);
686	LOAD (next);	1105	prev->flags &= ~CF_NEW;
687	UNLOCK;	1106	prev->flags |= CF_RUNNING;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}	1107	}
722	else if (next->tmps_ix == -2)	1108
723	croak ("tried to transfer to running coroutine");	1109	prev->flags &= ~CF_RUNNING;
		1110	next->flags |= CF_RUNNING;
		1111
		1112	LOCK;
		1113
		1114	if (expect_false (next->flags & CF_NEW))
		1115	{
		1116	/* need to start coroutine */
		1117	next->flags &= ~CF_NEW;
		1118	/* first get rid of the old state */
		1119	save_perl (aTHX_ prev);
		1120	/* setup coroutine call */
		1121	coro_setup (aTHX_ next);
		1122	}
724	else	1123	else
725	{	1124	{
726	LOCK;	1125	/* coroutine already started */
727	SAVE (prev, -1); /* first get rid of the old state */	1126	save_perl (aTHX_ prev);
		1127	load_perl (aTHX_ next);
		1128	}
		1129
		1130	prev__cctx = prev->cctx;
		1131
		1132	/* possibly "free" the cctx */
		1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1134	{
		1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1137
		1138	prev->cctx = 0;
		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	if (!next->cctx)
		1144	next->cctx = cctx_get (aTHX);
		1145
		1146	cctx_put (prev__cctx);
		1147	}
		1148
		1149	++next->usecount;
		1150
		1151	if (expect_true (!next->cctx))
		1152	next->cctx = cctx_get (aTHX);
		1153
		1154	if (expect_false (prev__cctx != next->cctx))
		1155	{
		1156	prev__cctx->top_env = PL_top_env;
		1157	PL_top_env = next->cctx->top_env;
		1158	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1159	}
		1160
		1161	free_coro_mortal (aTHX);
728	UNLOCK;	1162	UNLOCK;
729		1163
730	if (flags & TRANSFER_SAVE_CCTXT)	1164	if (expect_false (prev->throw || next->throw))
		1165	{
		1166	struct coro *coro = SvSTATE (coro_current);
		1167
		1168	if (coro->throw)
731	{	1169	{
732	if (!prev->stack)	1170	SV *exception = coro->throw;
733	allocate_stack (prev, 0);	1171	coro->throw = 0;
734		1172	sv_setsv (ERRSV, exception);
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
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);	1173	croak (0);
762	next->cursp = stacklevel;
763	}	1174	}
764	}	1175	}
765	}	1176	}
		1177	}
766		1178
767	LOCK;	1179	struct transfer_args
768	if (coro_mortal)	1180	{
769	{	1181	struct coro *prev, *next;
770	SvREFCNT_dec (coro_mortal);	1182	};
771	coro_mortal = 0;	1183
		1184	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1185	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1186
		1187	/** high level stuff ********************************************************/
		1188
		1189	static int
		1190	coro_state_destroy (pTHX_ struct coro *coro)
		1191	{
		1192	if (coro->flags & CF_DESTROYED)
		1193	return 0;
		1194
		1195	coro->flags |= CF_DESTROYED;
		1196
		1197	if (coro->flags & CF_READY)
772	}	1198	{
		1199	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1200	/* alternative: look through all ready queues and remove the coro */
		1201	LOCK;
		1202	--coro_nready;
773	UNLOCK;	1203	UNLOCK;
774	}	1204	}
		1205	else
		1206	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
775		1207
776	#define SV_CORO(sv,func) \	1208	if (coro->mainstack && coro->mainstack != main_mainstack)
777	do { \	1209	{
778	if (SvROK (sv)) \	1210	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		1211
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1212	if (coro->flags & CF_RUNNING)
		1213	croak ("FATAL: tried to destroy currently running coroutine");
798		1214
		1215	save_perl (aTHX_ &temp);
		1216	load_perl (aTHX_ coro);
		1217
		1218	coro_destroy (aTHX_ coro);
		1219
		1220	load_perl (aTHX_ &temp);
		1221
		1222	coro->slot = 0;
		1223	}
		1224
		1225	cctx_destroy (coro->cctx);
		1226	SvREFCNT_dec (coro->args);
		1227
		1228	if (coro->next) coro->next->prev = coro->prev;
		1229	if (coro->prev) coro->prev->next = coro->next;
		1230	if (coro == coro_first) coro_first = coro->next;
		1231
		1232	return 1;
		1233	}
		1234
799	static void	1235	static int
		1236	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1237	{
		1238	struct coro *coro = (struct coro *)mg->mg_ptr;
		1239	mg->mg_ptr = 0;
		1240
		1241	coro->hv = 0;
		1242
		1243	if (--coro->refcnt < 0)
		1244	{
		1245	coro_state_destroy (aTHX_ coro);
		1246	Safefree (coro);
		1247	}
		1248
		1249	return 0;
		1250	}
		1251
		1252	static int
		1253	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1254	{
		1255	struct coro *coro = (struct coro *)mg->mg_ptr;
		1256
		1257	++coro->refcnt;
		1258
		1259	return 0;
		1260	}
		1261
		1262	static MGVTBL coro_state_vtbl = {
		1263	0, 0, 0, 0,
		1264	coro_state_free,
		1265	0,
		1266	#ifdef MGf_DUP
		1267	coro_state_dup,
		1268	#else
		1269	# define MGf_DUP 0
		1270	#endif
		1271	};
		1272
		1273	static void
		1274	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1275	{
		1276	ta->prev = SvSTATE (prev_sv);
		1277	ta->next = SvSTATE (next_sv);
		1278	TRANSFER_CHECK (*ta);
		1279	}
		1280
		1281	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1282	api_transfer (SV *prev_sv, SV *next_sv)
801	{	1283	{
802	SV_CORO (prev, "Coro::transfer");	1284	dTHX;
803	SV_CORO (next, "Coro::transfer");	1285	struct transfer_args ta;
804		1286
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1287	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1288	TRANSFER (ta);
806	}	1289	}
807		1290
808	/** Coro ********************************************************************/	1291	/** Coro ********************************************************************/
809		1292
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	1293	static void
823	coro_enq (pTHX_ SV *sv)	1294	coro_enq (pTHX_ SV *coro_sv)
824	{	1295	{
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);	1296	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1297	}
841		1298
842	static SV *	1299	static SV *
843	coro_deq (pTHX_ int min_prio)	1300	coro_deq (pTHX_ int min_prio)
844	{	1301	{
…		…
847	min_prio -= PRIO_MIN;	1304	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1305	if (min_prio < 0)
849	min_prio = 0;	1306	min_prio = 0;
850		1307
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1308	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	1309	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1310	return av_shift (coro_ready [prio]);
856	}
857		1311
858	return 0;	1312	return 0;
859	}	1313	}
860		1314
861	static void	1315	static int
862	api_ready (SV *coro)	1316	api_ready (SV *coro_sv)
863	{	1317	{
864	dTHX;	1318	dTHX;
		1319	struct coro *coro;
865		1320
866	if (SvROK (coro))	1321	if (SvROK (coro_sv))
867	coro = SvRV (coro);	1322	coro_sv = SvRV (coro_sv);
		1323
		1324	coro = SvSTATE (coro_sv);
		1325
		1326	if (coro->flags & CF_READY)
		1327	return 0;
		1328
		1329	coro->flags |= CF_READY;
868		1330
869	LOCK;	1331	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1332	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1333	++coro_nready;
871	UNLOCK;	1334	UNLOCK;
		1335
		1336	return 1;
		1337	}
		1338
		1339	static int
		1340	api_is_ready (SV *coro_sv)
		1341	{
		1342	dTHX;
		1343	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1344	}
		1345
		1346	static void
		1347	prepare_schedule (pTHX_ struct transfer_args *ta)
		1348	{
		1349	SV *prev_sv, *next_sv;
		1350
		1351	for (;;)
		1352	{
		1353	LOCK;
		1354	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1355
		1356	/* nothing to schedule: call the idle handler */
		1357	if (expect_false (!next_sv))
		1358	{
		1359	dSP;
		1360	UNLOCK;
		1361
		1362	ENTER;
		1363	SAVETMPS;
		1364
		1365	PUSHMARK (SP);
		1366	PUTBACK;
		1367	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1368
		1369	FREETMPS;
		1370	LEAVE;
		1371	continue;
		1372	}
		1373
		1374	ta->next = SvSTATE (next_sv);
		1375
		1376	/* cannot transfer to destroyed coros, skip and look for next */
		1377	if (expect_false (ta->next->flags & CF_DESTROYED))
		1378	{
		1379	UNLOCK;
		1380	SvREFCNT_dec (next_sv);
		1381	/* coro_nready is already taken care of by destroy */
		1382	continue;
		1383	}
		1384
		1385	--coro_nready;
		1386	UNLOCK;
		1387	break;
		1388	}
		1389
		1390	/* free this only after the transfer */
		1391	prev_sv = SvRV (coro_current);
		1392	ta->prev = SvSTATE (prev_sv);
		1393	TRANSFER_CHECK (*ta);
		1394	assert (ta->next->flags & CF_READY);
		1395	ta->next->flags &= ~CF_READY;
		1396	SvRV_set (coro_current, next_sv);
		1397
		1398	LOCK;
		1399	free_coro_mortal (aTHX);
		1400	coro_mortal = prev_sv;
		1401	UNLOCK;
		1402	}
		1403
		1404	static void
		1405	prepare_cede (pTHX_ struct transfer_args *ta)
		1406	{
		1407	api_ready (coro_current);
		1408	prepare_schedule (aTHX_ ta);
		1409	}
		1410
		1411	static int
		1412	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1413	{
		1414	if (coro_nready)
		1415	{
		1416	SV *prev = SvRV (coro_current);
		1417	prepare_schedule (aTHX_ ta);
		1418	api_ready (prev);
		1419	return 1;
		1420	}
		1421	else
		1422	return 0;
872	}	1423	}
873		1424
874	static void	1425	static void
875	api_schedule (void)	1426	api_schedule (void)
876	{	1427	{
877	dTHX;	1428	dTHX;
		1429	struct transfer_args ta;
878		1430
879	SV *prev, *next;	1431	prepare_schedule (aTHX_ &ta);
880		1432	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	}	1433	}
902		1434
903	static void	1435	static int
904	api_cede (void)	1436	api_cede (void)
905	{	1437	{
906	dTHX;	1438	dTHX;
		1439	struct transfer_args ta;
907		1440
908	LOCK;	1441	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1442
912	api_schedule ();	1443	if (expect_true (ta.prev != ta.next))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
913	}	1450	}
914		1451
		1452	static int
		1453	api_cede_notself (void)
		1454	{
		1455	dTHX;
		1456	struct transfer_args ta;
		1457
		1458	if (prepare_cede_notself (aTHX_ &ta))
		1459	{
		1460	TRANSFER (ta);
		1461	return 1;
		1462	}
		1463	else
		1464	return 0;
		1465	}
		1466
		1467	static void
		1468	api_trace (SV *coro_sv, int flags)
		1469	{
		1470	dTHX;
		1471	struct coro *coro = SvSTATE (coro_sv);
		1472
		1473	if (flags & CC_TRACE)
		1474	{
		1475	if (!coro->cctx)
		1476	coro->cctx = cctx_new ();
		1477	else if (!(coro->cctx->flags & CC_TRACE))
		1478	croak ("cannot enable tracing on coroutine with custom stack");
		1479
		1480	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1481	}
		1482	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1483	{
		1484	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1485
		1486	if (coro->flags & CF_RUNNING)
		1487	PL_runops = RUNOPS_DEFAULT;
		1488	else
		1489	coro->slot->runops = RUNOPS_DEFAULT;
		1490	}
		1491	}
		1492
915	MODULE = Coro::State PACKAGE = Coro::State	1493	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1494
917	PROTOTYPES: ENABLE	1495	PROTOTYPES: DISABLE
918		1496
919	BOOT:	1497	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1498	{
921	#ifdef USE_ITHREADS	1499	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1500	MUTEX_INIT (&coro_mutex);
923	#endif	1501	#endif
924	BOOT_PAGESIZE;	1502	BOOT_PAGESIZE;
925		1503
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1504	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1505	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1506
		1507	hv_sig = coro_get_hv ("SIG", TRUE);
		1508	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1509	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1510
		1511	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1512	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1513
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1514	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1515
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934		1520
935	main_mainstack = PL_mainstack;	1521	main_mainstack = PL_mainstack;
		1522	main_top_env = PL_top_env;
		1523
		1524	while (main_top_env->je_prev)
		1525	main_top_env = main_top_env->je_prev;
936		1526
937	coroapi.ver = CORO_API_VERSION;	1527	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1528	coroapi.transfer = api_transfer;
939	}
940		1529
941	Coro::State	1530	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1531	}
943	SV * args	1532
944	PROTOTYPE: $	1533	SV *
		1534	new (char *klass, ...)
945	CODE:	1535	CODE:
946	Coro__State coro;	1536	{
		1537	struct coro *coro;
		1538	HV *hv;
		1539	int i;
947		1540
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);	1541	Newz (0, coro, 1, struct coro);
		1542	coro->args = newAV ();
		1543	coro->flags = CF_NEW;
952		1544
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1545	if (coro_first) coro_first->prev = coro;
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1546	coro->next = coro_first;
955	/*coro->stack = 0;*/	1547	coro_first = coro;
956		1548
957	/* same as JMPENV_BOOTSTRAP */	1549	coro->hv = hv = newHV ();
958	/* we might be able to recycle start_env, but safe is safe */	1550	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
959	/*Zero (&coro->start_env, 1, JMPENV);*/	1551	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962		1552
963	RETVAL = coro;	1553	av_extend (coro->args, items - 1);
		1554	for (i = 1; i < items; i++)
		1555	av_push (coro->args, newSVsv (ST (i)));
		1556	}
964	OUTPUT:	1557	OUTPUT:
965	RETVAL	1558	RETVAL
966		1559
		1560	# these not obviously related functions are all rolled into the same xs
		1561	# function to increase chances that they all will call transfer with the same
		1562	# stack offset
967	void	1563	void
968	transfer(prev, next, flags)	1564	_set_stacklevel (...)
969	SV *prev	1565	ALIAS:
970	SV *next	1566	Coro::State::transfer = 1
971	int flags	1567	Coro::schedule = 2
972	PROTOTYPE: @	1568	Coro::cede = 3
		1569	Coro::cede_notself = 4
973	CODE:	1570	CODE:
974	PUTBACK;	1571	{
975	SV_CORO (next, "Coro::transfer");	1572	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1573
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1574	switch (ix)
978	SPAGAIN;	1575	{
		1576	case 0:
		1577	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1578	ta.next = 0;
		1579	break;
		1580
		1581	case 1:
		1582	if (items != 2)
		1583	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1584
		1585	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1586	break;
		1587
		1588	case 2:
		1589	prepare_schedule (aTHX_ &ta);
		1590	break;
		1591
		1592	case 3:
		1593	prepare_cede (aTHX_ &ta);
		1594	break;
		1595
		1596	case 4:
		1597	if (!prepare_cede_notself (aTHX_ &ta))
		1598	XSRETURN_EMPTY;
		1599
		1600	break;
		1601	}
		1602
		1603	BARRIER;
		1604	TRANSFER (ta);
		1605
		1606	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1607	XSRETURN_YES;
		1608	}
		1609
		1610	bool
		1611	_destroy (SV *coro_sv)
		1612	CODE:
		1613	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1614	OUTPUT:
		1615	RETVAL
979		1616
980	void	1617	void
981	DESTROY(coro)
982	Coro::State coro
983	CODE:
984
985	if (coro->mainstack && coro->mainstack != main_mainstack)
986	{
987	struct coro temp;
988
989	PUTBACK;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
991	LOAD (aTHX_ coro);
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005
1006	void
1007	_exit(code)	1618	_exit (code)
1008	int code	1619	int code
1009	PROTOTYPE: $	1620	PROTOTYPE: $
1010	CODE:	1621	CODE:
1011	_exit (code);	1622	_exit (code);
1012		1623
1013	MODULE = Coro::State PACKAGE = Coro::Cont	1624	int
		1625	cctx_stacksize (int new_stacksize = 0)
		1626	CODE:
		1627	RETVAL = coro_stacksize;
		1628	if (new_stacksize)
		1629	coro_stacksize = new_stacksize;
		1630	OUTPUT:
		1631	RETVAL
1014		1632
1015	# this is slightly dirty (should expose a c-level api)	1633	int
		1634	cctx_count ()
		1635	CODE:
		1636	RETVAL = cctx_count;
		1637	OUTPUT:
		1638	RETVAL
		1639
		1640	int
		1641	cctx_idle ()
		1642	CODE:
		1643	RETVAL = cctx_idle;
		1644	OUTPUT:
		1645	RETVAL
1016		1646
1017	void	1647	void
1018	yield(...)	1648	list ()
1019	PROTOTYPE: @	1649	PPCODE:
		1650	{
		1651	struct coro *coro;
		1652	for (coro = coro_first; coro; coro = coro->next)
		1653	if (coro->hv)
		1654	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1655	}
		1656
		1657	void
		1658	call (Coro::State coro, SV *coderef)
		1659	ALIAS:
		1660	eval = 1
		1661	CODE:
		1662	{
		1663	if (coro->mainstack)
		1664	{
		1665	struct coro temp;
		1666
		1667	if (!(coro->flags & CF_RUNNING))
		1668	{
		1669	save_perl (aTHX_ &temp);
		1670	load_perl (aTHX_ coro);
		1671	}
		1672
		1673	{
		1674	dSP;
		1675	ENTER;
		1676	SAVETMPS;
		1677	PUSHMARK (SP);
		1678	PUTBACK;
		1679
		1680	if (ix)
		1681	eval_sv (coderef, 0);
		1682	else
		1683	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1684
		1685	SPAGAIN;
		1686	FREETMPS;
		1687	LEAVE;
		1688	PUTBACK;
		1689	}
		1690
		1691	if (!(coro->flags & CF_RUNNING))
		1692	{
		1693	save_perl (aTHX_ coro);
		1694	load_perl (aTHX_ &temp);
		1695	}
		1696	}
		1697	}
		1698
		1699	SV *
		1700	is_ready (Coro::State coro)
		1701	PROTOTYPE: $
		1702	ALIAS:
		1703	is_ready = CF_READY
		1704	is_running = CF_RUNNING
		1705	is_new = CF_NEW
		1706	is_destroyed = CF_DESTROYED
		1707	CODE:
		1708	RETVAL = boolSV (coro->flags & ix);
		1709	OUTPUT:
		1710	RETVAL
		1711
		1712	void
		1713	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1714
		1715	SV *
		1716	has_stack (Coro::State coro)
		1717	PROTOTYPE: $
		1718	CODE:
		1719	RETVAL = boolSV (!!coro->cctx);
		1720	OUTPUT:
		1721	RETVAL
		1722
		1723	int
		1724	is_traced (Coro::State coro)
		1725	PROTOTYPE: $
		1726	CODE:
		1727	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	IV
		1732	rss (Coro::State coro)
		1733	PROTOTYPE: $
		1734	ALIAS:
		1735	usecount = 1
1020	CODE:	1736	CODE:
1021	SV *yieldstack;	1737	switch (ix)
1022	SV *sv;	1738	{
1023	AV *defav = GvAV (PL_defgv);	1739	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1024	struct coro *prev, *next;	1740	case 1: RETVAL = coro->usecount; break;
1025
1026	yieldstack = *hv_fetch (
1027	(HV *)SvRV (GvSV (coro_current)),
1028	"yieldstack", sizeof ("yieldstack") - 1,
1029	0	1741	}
1030	);	1742	OUTPUT:
		1743	RETVAL
1031		1744
1032	/* set up @_ -- ugly */
1033	av_clear (defav);
1034	av_fill (defav, items - 1);
1035	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041	SvREFCNT_dec (sv);
1042
1043	transfer (aTHX_ prev, next, 0);
1044		1745
1045	MODULE = Coro::State PACKAGE = Coro	1746	MODULE = Coro::State PACKAGE = Coro
1046		1747
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1748	BOOT:
1050	{	1749	{
1051	int i;	1750	int i;
		1751
		1752	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1753	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1754	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1755
		1756	coro_current = coro_get_sv ("Coro::current", FALSE);
		1757	SvREADONLY_on (coro_current);
		1758
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1759	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1760
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1761	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1762	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1763	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1764	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1765	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1766	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1767
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1768	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065	coro_ready[i] = newAV ();	1769	coro_ready[i] = newAV ();
1066		1770
1067	{	1771	{
1068	SV *sv = perl_get_sv("Coro::API", 1);	1772	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1773	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1069		1774
1070	coroapi.schedule = api_schedule;	1775	coroapi.schedule = api_schedule;
1071	coroapi.cede = api_cede;	1776	coroapi.cede = api_cede;
		1777	coroapi.cede_notself = api_cede_notself;
1072	coroapi.ready = api_ready;	1778	coroapi.ready = api_ready;
		1779	coroapi.is_ready = api_is_ready;
1073	coroapi.nready = &coro_nready;	1780	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1781	coroapi.current = coro_current;
1075		1782
1076	GCoroAPI = &coroapi;	1783	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1784	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1785	SvREADONLY_on (sv);
1079	}	1786	}
1080	}	1787	}
1081		1788
1082	#if !PERL_MICRO
1083
1084	void	1789	void
1085	ready(self)	1790	_set_current (SV *current)
1086	SV * self
1087	PROTOTYPE: $	1791	PROTOTYPE: $
1088	CODE:	1792	CODE:
1089	api_ready (self);	1793	SvREFCNT_dec (SvRV (coro_current));
1090		1794	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1091	#endif
1092		1795
1093	int	1796	int
		1797	prio (Coro::State coro, int newprio = 0)
		1798	ALIAS:
		1799	nice = 1
		1800	CODE:
		1801	{
		1802	RETVAL = coro->prio;
		1803
		1804	if (items > 1)
		1805	{
		1806	if (ix)
		1807	newprio = coro->prio - newprio;
		1808
		1809	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1810	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1811
		1812	coro->prio = newprio;
		1813	}
		1814	}
		1815	OUTPUT:
		1816	RETVAL
		1817
		1818	SV *
		1819	ready (SV *self)
		1820	PROTOTYPE: $
		1821	CODE:
		1822	RETVAL = boolSV (api_ready (self));
		1823	OUTPUT:
		1824	RETVAL
		1825
		1826	int
1094	nready(...)	1827	nready (...)
1095	PROTOTYPE:	1828	PROTOTYPE:
1096	CODE:	1829	CODE:
1097	RETVAL = coro_nready;	1830	RETVAL = coro_nready;
1098	OUTPUT:	1831	OUTPUT:
1099	RETVAL	1832	RETVAL
1100		1833
1101	void	1834	void
1102	schedule(...)	1835	throw (Coro::State self, SV *throw = &PL_sv_undef)
1103	PROTOTYPE:	1836	PROTOTYPE: $;$
		1837	CODE:
		1838	SvREFCNT_dec (self->throw);
		1839	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1840
		1841	# for async_pool speedup
		1842	void
		1843	_pool_1 (SV *cb)
1104	CODE:	1844	CODE:
1105	api_schedule ();	1845	{
		1846	struct coro *coro = SvSTATE (coro_current);
		1847	HV *hv = (HV *)SvRV (coro_current);
		1848	AV *defav = GvAV (PL_defgv);
		1849	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1850	AV *invoke_av;
		1851	int i, len;
		1852
		1853	if (!invoke)
		1854	croak ("\3async_pool terminate\2\n");
		1855
		1856	SvREFCNT_dec (coro->saved_deffh);
		1857	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1858
		1859	hv_store (hv, "desc", sizeof ("desc") - 1,
		1860	newSVpvn (strpair ("[async_pool]")), 0);
		1861
		1862	invoke_av = (AV *)SvRV (invoke);
		1863	len = av_len (invoke_av);
		1864
		1865	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1866
		1867	if (len > 0)
		1868	{
		1869	av_fill (defav, len - 1);
		1870	for (i = 0; i < len; ++i)
		1871	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1872	}
		1873
		1874	SvREFCNT_dec (invoke);
		1875	}
1106		1876
1107	void	1877	void
1108	cede(...)	1878	_pool_2 (SV *cb)
1109	PROTOTYPE:
1110	CODE:	1879	CODE:
1111	api_cede ();	1880	{
		1881	struct coro *coro = SvSTATE (coro_current);
1112		1882
1113	# and these are hacks	1883	sv_setsv (cb, &PL_sv_undef);
		1884
		1885	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1886	coro->saved_deffh = 0;
		1887
		1888	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1889	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1890	croak ("\3async_pool terminate\2\n");
		1891
		1892	av_clear (GvAV (PL_defgv));
		1893	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1894	newSVpvn (strpair ("[async_pool idle]")), 0);
		1895
		1896	coro->prio = 0;
		1897
		1898	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1899	api_trace (coro_current, 0);
		1900
		1901	av_push (av_async_pool, newSVsv (coro_current));
		1902	}
		1903
		1904
		1905	MODULE = Coro::State PACKAGE = Coro::AIO
		1906
1114	SV *	1907	SV *
1115	_aio_get_state ()	1908	_get_state ()
1116	CODE:	1909	CODE:
1117	{	1910	{
1118	struct {	1911	struct io_state *data;
1119	int errorno;
1120	int laststype;
1121	int laststatval;
1122	Stat_t statcache;
1123	} data;
1124		1912
		1913	RETVAL = newSV (sizeof (struct io_state));
		1914	data = (struct io_state *)SvPVX (RETVAL);
		1915	SvCUR_set (RETVAL, sizeof (struct io_state));
		1916	SvPOK_only (RETVAL);
		1917
1125	data.errorno = errno;	1918	data->errorno = errno;
1126	data.laststype = PL_laststype;	1919	data->laststype = PL_laststype;
1127	data.laststatval = PL_laststatval;	1920	data->laststatval = PL_laststatval;
1128	data.statcache = PL_statcache;	1921	data->statcache = PL_statcache;
1129
1130	RETVAL = newSVpvn ((char *)&data, sizeof data);
1131	}	1922	}
1132	OUTPUT:	1923	OUTPUT:
1133	RETVAL	1924	RETVAL
1134		1925
1135	void	1926	void
1136	_aio_set_state (char *data_)	1927	_set_state (char *data_)
1137	PROTOTYPE: $	1928	PROTOTYPE: $
1138	CODE:	1929	CODE:
1139	{	1930	{
1140	struct {	1931	struct io_state *data = (void *)data_;
1141	int errorno;
1142	int laststype;
1143	int laststatval;
1144	Stat_t statcache;
1145	} *data = (void *)data_;
1146		1932
1147	errno = data->errorno;	1933	errno = data->errorno;
1148	PL_laststype = data->laststype;	1934	PL_laststype = data->laststype;
1149	PL_laststatval = data->laststatval;	1935	PL_laststatval = data->laststatval;
1150	PL_statcache = data->statcache;	1936	PL_statcache = data->statcache;
1151	}	1937	}
		1938

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