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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs.
Revision 1.205 by root, Tue Oct 9 14:07:02 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);
		303	#if PERL_VERSION_ATLEAST (5,9,0)
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		305	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		307	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	308	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	309	--AvFILLp (padlist);
171		310
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	311	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
173	av_store (newpadlist, 1, (SV *)newpad);	312	av_store (newpadlist, 1, (SV *)newpad);
…		…
216		355
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	356	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		357
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	358	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		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
221	/* the next two functions merely cache the padlists */	393	/* the next two functions merely cache the padlists */
222	static void	394	static void
223	get_padlist (pTHX_ CV *cv)	395	get_padlist (pTHX_ CV *cv)
224	{	396	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	397	MAGIC *mg = CORO_MAGIC (cv);
		398	AV *av;
226		399
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	402	else
230	{	403	{
231	#if 0	404	#if CORO_PREFER_PERL_FUNCTIONS
232	/* this should work - but it doesn't :( */	405	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (aTHX_ cv);	406	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	407	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	408	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	409	SvREFCNT_dec (cp);
237	#else	410	#else
238	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
241	}	414	}
242		415
243	static void	416	static void
244	put_padlist (pTHX_ CV *cv)	417	put_padlist (pTHX_ CV *cv)
245	{	418	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	419	MAGIC *mg = CORO_MAGIC (cv);
		420	AV *av;
247		421
248	if (!mg)	422	if (expect_false (!mg))
249	{	423	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	426	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	427	mg->mg_obj = (SV *)newAV ();
254	}	428	}
255		429
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	430	av = (AV *)mg->mg_obj;
257	}
258		431
259	#define SB do {	432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
260	#define SE } while (0)	433	av_extend (av, AvMAX (av) + 1);
261		434
262	#define LOAD(state) load_state(aTHX_ (state));	435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	436	}
264		437
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	438	/** load & save, init *******************************************************/
266		439
267	static void	440	static void
268	load_state(pTHX_ Coro__State c)	441	load_perl (pTHX_ Coro__State c)
269	{	442	{
270	PL_dowarn = c->dowarn;	443	perl_slots *slot = c->slot;
271	PL_in_eval = c->in_eval;	444	c->slot = 0;
272		445
273	PL_curstackinfo = c->curstackinfo;
274	PL_curstack = c->curstack;
275	PL_mainstack = c->mainstack;	446	PL_mainstack = c->mainstack;
276	PL_stack_sp = c->stack_sp;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303	PL_top_env = c->top_env;
304		447
305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	448	GvSV (PL_defgv) = slot->defsv;
306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	449	GvAV (PL_defgv) = slot->defav;
307	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);*/
308		459
309	{	460	{
310	dSP;	461	dSP;
		462
311	CV *cv;	463	CV *cv;
312		464
313	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
314	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
315	{	467	{
316	AV *padlist = (AV *)POPs;
317
318	if (padlist)
319	{
320	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
321	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
322	}	470	CvPADLIST (cv) = (AV *)POPs;
323
324	++CvDEPTH(cv);
325	}	471	}
326		472
327	PUTBACK;	473	PUTBACK;
328	}	474	}
329	}	475	}
330		476
331	static void	477	static void
332	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
333	{	479	{
334	{	480	{
335	dSP;	481	dSP;
336	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
337	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
340	/*	486	/*
341	* 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
342	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
343	*/	489	*/
344		490
345	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
346	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
347	for (;;)	493	for (;;)
348	{	494	{
349	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
350	{	496	{
351	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
352		498
353	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
354	{	500	{
355	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
356	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
357	{	504	{
358	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
359
360	while (--CvDEPTH(cv))
361	{
362	/* this tells the restore code to increment CvDEPTH */
363	PUSHs (Nullsv);
364	PUSHs ((SV *)cv);
365	}
366
367	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
368	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
369		509
		510	CvDEPTH (cv) = 0;
370	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
371	}	512	}
372	}	513	}
373	#ifdef CXt_FORMAT
374	else if (CxTYPE(cx) == CXt_FORMAT)
375	{
376	/* I never used formats, so how should I know how these are implemented? */
377	/* my bold guess is as a simple, plain sub... */
378	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379	}
380	#endif
381	}	514	}
382		515
383	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
384	break;	517	break;
385		518
386	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
387	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
388	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
389	}	522	}
390		523
391	PUTBACK;	524	PUTBACK;
392	}	525	}
393		526
394	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
395	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
396	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 */
397		538
398	c->dowarn = PL_dowarn;
399	c->in_eval = PL_in_eval;
400
401	c->curstackinfo = PL_curstackinfo;
402	c->curstack = PL_curstack;
403	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
404	c->stack_sp = PL_stack_sp;	540
405	c->op = PL_op;	541	{
406	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
407	c->comppad = PL_comppad;	543
408	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
409	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
410	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
411	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
412	c->tmps_floor = PL_tmps_floor;	548
413	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
414	c->tmps_max = PL_tmps_max;	550	# include "state.h"
415	c->markstack = PL_markstack;	551	#undef VAR
416	c->markstack_ptr = PL_markstack_ptr;	552	}
417	c->markstack_max = PL_markstack_max;
418	c->scopestack = PL_scopestack;
419	c->scopestack_ix = PL_scopestack_ix;
420	c->scopestack_max = PL_scopestack_max;
421	c->savestack = PL_savestack;
422	c->savestack_ix = PL_savestack_ix;
423	c->savestack_max = PL_savestack_max;
424	#if PERL_VERSION < 9
425	c->retstack = PL_retstack;
426	c->retstack_ix = PL_retstack_ix;
427	c->retstack_max = PL_retstack_max;
428	#endif
429	c->curpm = PL_curpm;
430	c->curcop = PL_curcop;
431	c->top_env = PL_top_env;
432	}	553	}
433		554
434	/*	555	/*
435	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
439	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
440	static void	564	static void
441	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
442	{	566	{
443	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		571
450	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		575
454	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
455	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	579	PL_tmps_max = 32;
458		580
459	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
460	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
462		584
463	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
465	#endif	587	#endif
466		588
467	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
468	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
470		592
471	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
472	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	595	PL_savestack_max = 24;
474		596
475	#if PERL_VERSION < 9	597	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
477	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	600	PL_retstack_max = 4;
479	#endif	601	#endif
480
481	UNLOCK;
482	}	602	}
		603	#endif
483		604
484	/*	605	/*
485	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
486	*/	607	*/
487	static void	608	static void
488	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
489	{	610	{
490	if (!IN_DESTRUCT)
491	{
492	/* is this ugly, I ask? */
493	LEAVE_SCOPE (0);
494
495	/* sure it is, but more important: is it correct?? :/ */
496	FREETMPS;
497
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499	}
500
501	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
503		613
504	while (PL_curstackinfo)	614	while (PL_curstackinfo)
505	{	615	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
507		617
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		620
520	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	623	PL_curstackinfo = p;
523	}	624	}
524		625
525	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	627	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	629	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	630	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	631	Safefree (PL_retstack);
531	#endif	632	#endif
532	}	633	}
533		634
534	static void	635	static size_t
535	allocate_stack (Coro__State ctx, int alloc)	636	coro_rss (pTHX_ struct coro *coro)
536	{	637	{
537	coro_stack *stack;	638	size_t rss = sizeof (*coro);
538		639
539	New (0, stack, 1, coro_stack);	640	if (coro->mainstack)
540
541	stack->refcnt = 1;
542	stack->usecnt = 1;
543	stack->gencnt = ctx->gencnt = 0;
544
545	if (alloc)
546	{	641	{
547	#if HAVE_MMAP	642	perl_slots tmp_slot;
548	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	643	perl_slots *slot;
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	644
550	if (stack->sptr != (void *)-1)	645	if (coro->flags & CF_RUNNING)
551	{	646	{
552	# if STACKGUARD	647	slot = &tmp_slot;
553	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	648
554	# endif	649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
555	}	652	}
556	else	653	else
557	#endif	654	slot = coro->slot;
558	{
559	stack->ssize = - (STACKSIZE * (long)sizeof (long));
560	New (0, stack->sptr, STACKSIZE, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565		655
566	ctx->stack = stack;	656	rss += sizeof (slot->curstackinfo);
567	}	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);
568		663
569	static void	664	#if !PERL_VERSION_ATLEAST (5,9,0)
570	deallocate_stack (Coro__State ctx)	665	rss += slot->retstack_max * sizeof (OP *);
571	{	666	#endif
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{	667	}
578	if (!--stack->refcnt)
579	{
580	#ifdef HAVE_MMAP
581	if (stack->ssize > 0 && stack->sptr)
582	munmap (stack->sptr, stack->ssize);
583	else
584	#endif
585	Safefree (stack->sptr);
586		668
587	Safefree (stack);	669	return rss;
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}	670	}
593		671
		672	/** coroutine stack handling ************************************************/
		673
594	static void	674	static void
595	setup_coro (void *arg)	675	coro_setup (pTHX_ struct coro *coro)
596	{	676	{
597	/*	677	/*
598	* emulate part of the perl startup here.	678	* emulate part of the perl startup here.
599	*/	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	{
600	dTHX;	924	dTHX;
601	dSP;
602	Coro__State ctx = (Coro__State)arg;
603	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
604		925
605	coro_init_stacks (aTHX);	926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
606	/*PL_curcop = 0;*/	927	UNLOCK;
607	/*PL_in_eval = PL_in_eval;*/ /* inherit */
608	SvREFCNT_dec (GvAV (PL_defgv));
609	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
610		928
611	SPAGAIN;	929	/* we now skip the entersub that lead to transfer() */
		930	PL_op = PL_op->op_next;
612		931
613	if (ctx->stack)	932	/* inject a fake subroutine call to cctx_init */
614	{	933	cctx_prepare (aTHX_ (coro_cctx *)arg);
615	ctx->cursp = 0;
616		934
617	PUSHMARK(SP);	935	/* somebody or something will hit me for both perl_run and PL_restartop */
618	PUTBACK;	936	PL_restartop = PL_op;
619	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	937	perl_run (PL_curinterp);
620		938
621	if (SvTRUE (ERRSV))	939	/*
622	croak (NULL);	940	* If perl-run returns we assume exit() was being called or the coro
623	else	941	* fell off the end, which seems to be the only valid (non-bug)
624	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	fprintf (stderr, "bp1\n");//D
		959
		960	Newz (0, cctx, 1, coro_cctx);
		961
		962	#if HAVE_MMAP
		963	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		964	/* mmap supposedly does allocate-on-write for us */
		965	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		966
		967	if (cctx->sptr != (void *)-1)
		968	{
		969	# if CORO_STACKGUARD
		970	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		971	# endif
		972	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		973	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		974	cctx->flags |= CC_MAPPED;
625	}	975	}
626	else	976	else
627	{	977	#endif
628	UNOP myop;
629
630	PL_op = (OP *)&myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PUSHMARK(SP);
637	XPUSHs (sub_init);
638	/*
639	* the next line is slightly wrong, as PL_op->op_next
640	* is actually being executed so we skip the first op.
641	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)
644	*/
645	PUTBACK;
646	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647	SPAGAIN;
648
649	ENTER; /* necessary e.g. for dounwind */
650	}	978	{
651	}	979	cctx->ssize = coro_stacksize * (long)sizeof (long);
		980	New (0, cctx->sptr, coro_stacksize, long);
652		981
653	static void	982	if (!cctx->sptr)
654	continue_coro (void *arg)	983	{
655	{	984	perror ("FATAL: unable to allocate stack for coroutine");
656	/*	985	_exit (EXIT_FAILURE);
657	* this is a _very_ stripped down perl interpreter ;)	986	}
658	*/
659	dTHX;
660	Coro__State ctx = (Coro__State)arg;
661		987
662	PL_top_env = &ctx->start_env;	988	stack_start = cctx->sptr;
		989	stack_size = cctx->ssize;
		990	}
663		991
664	ctx->cursp = 0;	992	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
665	PL_op = PL_op->op_next;	993	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
666	CALLRUNOPS(aTHX);
667		994
668	abort ();	995	return cctx;
669	}	996	}
670		997
671	static void	998	static void
		999	cctx_destroy (coro_cctx *cctx)
		1000	{
		1001	if (!cctx)
		1002	return;
		1003
		1004	--cctx_count;
		1005
		1006	#if CORO_USE_VALGRIND
		1007	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1008	#endif
		1009
		1010	#if HAVE_MMAP
		1011	if (cctx->flags & CC_MAPPED)
		1012	munmap (cctx->sptr, cctx->ssize);
		1013	else
		1014	#endif
		1015	Safefree (cctx->sptr);
		1016
		1017	Safefree (cctx);
		1018	}
		1019
		1020	/* wether this cctx should be destructed */
		1021	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1022
		1023	static coro_cctx *
		1024	cctx_get (pTHX)
		1025	{
		1026	while (expect_true (cctx_first))
		1027	{
		1028	coro_cctx *cctx = cctx_first;
		1029	cctx_first = cctx->next;
		1030	--cctx_idle;
		1031
		1032	if (expect_true (!CCTX_EXPIRED (cctx)))
		1033	return cctx;
		1034
		1035	cctx_destroy (cctx);
		1036	}
		1037
		1038	return cctx_new ();
		1039	}
		1040
		1041	static void
		1042	cctx_put (coro_cctx *cctx)
		1043	{
		1044	/* free another cctx if overlimit */
		1045	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1046	{
		1047	coro_cctx *first = cctx_first;
		1048	cctx_first = first->next;
		1049	--cctx_idle;
		1050
		1051	cctx_destroy (first);
		1052	}
		1053
		1054	++cctx_idle;
		1055	cctx->next = cctx_first;
		1056	cctx_first = cctx;
		1057	}
		1058
		1059	/** coroutine switching *****************************************************/
		1060
		1061	static void
		1062	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1063	{
		1064	if (expect_true (prev != next))
		1065	{
		1066	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1067	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1068
		1069	if (expect_false (next->flags & CF_RUNNING))
		1070	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1071
		1072	if (expect_false (next->flags & CF_DESTROYED))
		1073	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1074
		1075	if (
		1076	#if PERL_VERSION_ATLEAST (5,9,0)
		1077	expect_false (PL_parser)
		1078	#else
		1079	expect_false (PL_lex_state != LEX_NOTPARSING)
		1080	#endif
		1081	)
		1082	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1083	}
		1084	}
		1085
		1086	/* always use the TRANSFER macro */
		1087	static void NOINLINE
672	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	1088	transfer (pTHX_ struct coro *prev, struct coro *next)
673	{	1089	{
674	dSTACKLEVEL;	1090	dSTACKLEVEL;
675		1091
676	if (prev != next)	1092	/* sometimes transfer is only called to set idle_sp */
		1093	if (expect_false (!next))
		1094	{
		1095	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1096	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
677	{	1097	}
678	if (next->mainstack)	1098	else if (expect_true (prev != next))
		1099	{
		1100	coro_cctx *prev__cctx;
		1101
		1102	if (expect_false (prev->flags & CF_NEW))
679	{	1103	{
680	LOCK;	1104	/* create a new empty context */
681	SAVE (prev, flags);	1105	Newz (0, prev->cctx, 1, coro_cctx);
682	LOAD (next);	1106	prev->flags &= ~CF_NEW;
683	UNLOCK;	1107	prev->flags |= CF_RUNNING;
684
685	/* mark this state as in-use */
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	prev->cursp = stacklevel;
713	/* don't add any code here */
714	}
715	else
716	next->cursp = stacklevel;
717	}	1108	}
718	else if (next->tmps_ix == -2)	1109
719	croak ("tried to transfer to running coroutine");	1110	prev->flags &= ~CF_RUNNING;
		1111	next->flags |= CF_RUNNING;
		1112
		1113	LOCK;
		1114
		1115	if (expect_false (next->flags & CF_NEW))
		1116	{
		1117	/* need to start coroutine */
		1118	next->flags &= ~CF_NEW;
		1119	/* first get rid of the old state */
		1120	save_perl (aTHX_ prev);
		1121	/* setup coroutine call */
		1122	coro_setup (aTHX_ next);
		1123	}
720	else	1124	else
721	{	1125	{
722	LOCK;	1126	/* coroutine already started */
723	SAVE (prev, -1); /* first get rid of the old state */	1127	save_perl (aTHX_ prev);
		1128	load_perl (aTHX_ next);
		1129	}
		1130
		1131	prev__cctx = prev->cctx;
		1132
		1133	/* possibly "free" the cctx */
		1134	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1135	{
		1136	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1137	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1138
		1139	prev->cctx = 0;
		1140
		1141	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1142	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1143	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1144	if (!next->cctx)
		1145	next->cctx = cctx_get (aTHX);
		1146
		1147	cctx_put (prev__cctx);
		1148	}
		1149
		1150	++next->usecount;
		1151
		1152	if (expect_true (!next->cctx))
		1153	next->cctx = cctx_get (aTHX);
		1154
		1155	if (expect_false (prev__cctx != next->cctx))
		1156	{
		1157	prev__cctx->top_env = PL_top_env;
		1158	PL_top_env = next->cctx->top_env;
		1159	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1160	}
		1161
		1162	free_coro_mortal (aTHX);
724	UNLOCK;	1163	UNLOCK;
725		1164
726	if (flags & TRANSFER_SAVE_CCTXT)	1165	if (expect_false (prev->throw || next->throw))
		1166	{
		1167	struct coro *coro = SvSTATE (coro_current);
		1168
		1169	if (coro->throw)
727	{	1170	{
728	if (!prev->stack)	1171	SV *exception = coro->throw;
729	allocate_stack (prev, 0);	1172	coro->throw = 0;
730		1173	sv_setsv (ERRSV, exception);
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	PL_top_env = &next->start_env;
734
735	setup_coro (next);
736	next->cursp = stacklevel;
737
738	prev->stack->refcnt++;
739	prev->stack->usecnt++;
740	next->stack = prev->stack;
741	next->gencnt = prev->gencnt;
742	}
743	else
744	{
745	assert (!next->stack);
746	allocate_stack (next, 1);
747	coro_create (&(next->stack->cctx),
748	setup_coro, (void *)next,
749	next->stack->sptr, labs (next->stack->ssize));
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	}
755	else
756	{
757	setup_coro (next);	1174	croak (0);
758	next->cursp = stacklevel;
759	}	1175	}
760	}	1176	}
761	}	1177	}
		1178	}
762		1179
763	LOCK;	1180	struct transfer_args
764	if (coro_mortal)	1181	{
765	{	1182	struct coro *prev, *next;
766	SvREFCNT_dec (coro_mortal);	1183	};
767	coro_mortal = 0;	1184
		1185	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1186	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1187
		1188	/** high level stuff ********************************************************/
		1189
		1190	static int
		1191	coro_state_destroy (pTHX_ struct coro *coro)
		1192	{
		1193	if (coro->flags & CF_DESTROYED)
		1194	return 0;
		1195
		1196	coro->flags |= CF_DESTROYED;
		1197
		1198	if (coro->flags & CF_READY)
768	}	1199	{
		1200	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1201	/* alternative: look through all ready queues and remove the coro */
		1202	LOCK;
		1203	--coro_nready;
769	UNLOCK;	1204	UNLOCK;
770	}	1205	}
		1206	else
		1207	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
771		1208
772	#define SV_CORO(sv,func) \	1209	if (coro->mainstack && coro->mainstack != main_mainstack)
773	do { \	1210	{
774	if (SvROK (sv)) \	1211	struct coro temp;
775	sv = SvRV (sv); \
776	\
777	if (SvTYPE (sv) == SVt_PVHV) \
778	{ \
779	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
780	\
781	if (!he) \
782	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
783	\
784	(sv) = SvRV (HeVAL(he)); \
785	} \
786	\
787	/* must also be changed inside Coro::Cont::yield */ \
788	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
789	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
790	\
791	} while(0)
792		1212
793	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1213	if (coro->flags & CF_RUNNING)
		1214	croak ("FATAL: tried to destroy currently running coroutine");
794		1215
		1216	save_perl (aTHX_ &temp);
		1217	load_perl (aTHX_ coro);
		1218
		1219	coro_destroy (aTHX_ coro);
		1220
		1221	load_perl (aTHX_ &temp);
		1222
		1223	coro->slot = 0;
		1224	}
		1225
		1226	cctx_destroy (coro->cctx);
		1227	SvREFCNT_dec (coro->args);
		1228
		1229	if (coro->next) coro->next->prev = coro->prev;
		1230	if (coro->prev) coro->prev->next = coro->next;
		1231	if (coro == coro_first) coro_first = coro->next;
		1232
		1233	return 1;
		1234	}
		1235
795	static void	1236	static int
		1237	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1238	{
		1239	struct coro *coro = (struct coro *)mg->mg_ptr;
		1240	mg->mg_ptr = 0;
		1241
		1242	coro->hv = 0;
		1243
		1244	if (--coro->refcnt < 0)
		1245	{
		1246	coro_state_destroy (aTHX_ coro);
		1247	Safefree (coro);
		1248	}
		1249
		1250	return 0;
		1251	}
		1252
		1253	static int
		1254	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1255	{
		1256	struct coro *coro = (struct coro *)mg->mg_ptr;
		1257
		1258	++coro->refcnt;
		1259
		1260	return 0;
		1261	}
		1262
		1263	static MGVTBL coro_state_vtbl = {
		1264	0, 0, 0, 0,
		1265	coro_state_free,
		1266	0,
		1267	#ifdef MGf_DUP
		1268	coro_state_dup,
		1269	#else
		1270	# define MGf_DUP 0
		1271	#endif
		1272	};
		1273
		1274	static void
		1275	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1276	{
		1277	ta->prev = SvSTATE (prev_sv);
		1278	ta->next = SvSTATE (next_sv);
		1279	TRANSFER_CHECK (*ta);
		1280	}
		1281
		1282	static void
796	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1283	api_transfer (SV *prev_sv, SV *next_sv)
797	{	1284	{
798	SV_CORO (prev, "Coro::transfer");	1285	dTHX;
799	SV_CORO (next, "Coro::transfer");	1286	struct transfer_args ta;
800		1287
801	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1288	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1289	TRANSFER (ta);
802	}	1290	}
803		1291
804	/** Coro ********************************************************************/	1292	/** Coro ********************************************************************/
805		1293
806	#define PRIO_MAX 3
807	#define PRIO_HIGH 1
808	#define PRIO_NORMAL 0
809	#define PRIO_LOW -1
810	#define PRIO_IDLE -3
811	#define PRIO_MIN -4
812
813	/* for Coro.pm */
814	static GV *coro_current, *coro_idle;
815	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;
817
818	static void	1294	static void
819	coro_enq (pTHX_ SV *sv)	1295	coro_enq (pTHX_ SV *coro_sv)
820	{	1296	{
821	SV **xprio;
822	int prio;
823
824	if (SvTYPE (sv) != SVt_PVHV)
825	croak ("Coro::ready tried to enqueue something that is not a coroutine");
826
827	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
828	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
829
830	prio = prio > PRIO_MAX ? PRIO_MAX
831	: prio < PRIO_MIN ? PRIO_MIN
832	: prio;
833
834	av_push (coro_ready [prio - PRIO_MIN], sv);	1297	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
835	coro_nready++;
836	}	1298	}
837		1299
838	static SV *	1300	static SV *
839	coro_deq (pTHX_ int min_prio)	1301	coro_deq (pTHX_ int min_prio)
840	{	1302	{
…		…
843	min_prio -= PRIO_MIN;	1305	min_prio -= PRIO_MIN;
844	if (min_prio < 0)	1306	if (min_prio < 0)
845	min_prio = 0;	1307	min_prio = 0;
846		1308
847	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1309	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
848	if (av_len (coro_ready[prio]) >= 0)	1310	if (AvFILLp (coro_ready [prio]) >= 0)
849	{
850	coro_nready--;
851	return av_shift (coro_ready[prio]);	1311	return av_shift (coro_ready [prio]);
852	}
853		1312
854	return 0;	1313	return 0;
855	}	1314	}
856		1315
857	static void	1316	static int
858	api_ready (SV *coro)	1317	api_ready (SV *coro_sv)
859	{	1318	{
860	dTHX;	1319	dTHX;
		1320	struct coro *coro;
861		1321
862	if (SvROK (coro))	1322	if (SvROK (coro_sv))
863	coro = SvRV (coro);	1323	coro_sv = SvRV (coro_sv);
		1324
		1325	coro = SvSTATE (coro_sv);
		1326
		1327	if (coro->flags & CF_READY)
		1328	return 0;
		1329
		1330	coro->flags |= CF_READY;
864		1331
865	LOCK;	1332	LOCK;
866	coro_enq (aTHX_ SvREFCNT_inc (coro));	1333	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1334	++coro_nready;
867	UNLOCK;	1335	UNLOCK;
		1336
		1337	return 1;
		1338	}
		1339
		1340	static int
		1341	api_is_ready (SV *coro_sv)
		1342	{
		1343	dTHX;
		1344	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1345	}
		1346
		1347	static void
		1348	prepare_schedule (pTHX_ struct transfer_args *ta)
		1349	{
		1350	SV *prev_sv, *next_sv;
		1351
		1352	for (;;)
		1353	{
		1354	LOCK;
		1355	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1356
		1357	/* nothing to schedule: call the idle handler */
		1358	if (expect_false (!next_sv))
		1359	{
		1360	dSP;
		1361	UNLOCK;
		1362
		1363	ENTER;
		1364	SAVETMPS;
		1365
		1366	PUSHMARK (SP);
		1367	PUTBACK;
		1368	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1369
		1370	FREETMPS;
		1371	LEAVE;
		1372	continue;
		1373	}
		1374
		1375	ta->next = SvSTATE (next_sv);
		1376
		1377	/* cannot transfer to destroyed coros, skip and look for next */
		1378	if (expect_false (ta->next->flags & CF_DESTROYED))
		1379	{
		1380	UNLOCK;
		1381	SvREFCNT_dec (next_sv);
		1382	/* coro_nready is already taken care of by destroy */
		1383	continue;
		1384	}
		1385
		1386	--coro_nready;
		1387	UNLOCK;
		1388	break;
		1389	}
		1390
		1391	/* free this only after the transfer */
		1392	prev_sv = SvRV (coro_current);
		1393	ta->prev = SvSTATE (prev_sv);
		1394	TRANSFER_CHECK (*ta);
		1395	assert (ta->next->flags & CF_READY);
		1396	ta->next->flags &= ~CF_READY;
		1397	SvRV_set (coro_current, next_sv);
		1398
		1399	LOCK;
		1400	free_coro_mortal (aTHX);
		1401	coro_mortal = prev_sv;
		1402	UNLOCK;
		1403	}
		1404
		1405	static void
		1406	prepare_cede (pTHX_ struct transfer_args *ta)
		1407	{
		1408	api_ready (coro_current);
		1409	prepare_schedule (aTHX_ ta);
		1410	}
		1411
		1412	static int
		1413	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1414	{
		1415	if (coro_nready)
		1416	{
		1417	SV *prev = SvRV (coro_current);
		1418	prepare_schedule (aTHX_ ta);
		1419	api_ready (prev);
		1420	return 1;
		1421	}
		1422	else
		1423	return 0;
868	}	1424	}
869		1425
870	static void	1426	static void
871	api_schedule (void)	1427	api_schedule (void)
872	{	1428	{
873	dTHX;	1429	dTHX;
		1430	struct transfer_args ta;
874		1431
875	SV *prev, *next;	1432	prepare_schedule (aTHX_ &ta);
876		1433	TRANSFER (ta);
877	LOCK;
878
879	prev = SvRV (GvSV (coro_current));
880	next = coro_deq (aTHX_ PRIO_MIN);
881
882	if (!next)
883	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
884
885	/* free this only after the transfer */
886	coro_mortal = prev;
887	SV_CORO (prev, "Coro::schedule");
888
889	SvRV (GvSV (coro_current)) = next;
890
891	SV_CORO (next, "Coro::schedule");
892
893	UNLOCK;
894
895	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
896	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
897	}	1434	}
898		1435
899	static void	1436	static int
900	api_cede (void)	1437	api_cede (void)
901	{	1438	{
902	dTHX;	1439	dTHX;
		1440	struct transfer_args ta;
903		1441
904	LOCK;	1442	prepare_cede (aTHX_ &ta);
905	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
906	UNLOCK;
907		1443
908	api_schedule ();	1444	if (expect_true (ta.prev != ta.next))
		1445	{
		1446	TRANSFER (ta);
		1447	return 1;
		1448	}
		1449	else
		1450	return 0;
909	}	1451	}
910		1452
		1453	static int
		1454	api_cede_notself (void)
		1455	{
		1456	dTHX;
		1457	struct transfer_args ta;
		1458
		1459	if (prepare_cede_notself (aTHX_ &ta))
		1460	{
		1461	TRANSFER (ta);
		1462	return 1;
		1463	}
		1464	else
		1465	return 0;
		1466	}
		1467
		1468	static void
		1469	api_trace (SV *coro_sv, int flags)
		1470	{
		1471	dTHX;
		1472	struct coro *coro = SvSTATE (coro_sv);
		1473
		1474	if (flags & CC_TRACE)
		1475	{
		1476	if (!coro->cctx)
		1477	coro->cctx = cctx_new ();
		1478	else if (!(coro->cctx->flags & CC_TRACE))
		1479	croak ("cannot enable tracing on coroutine with custom stack");
		1480
		1481	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1482	}
		1483	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1484	{
		1485	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1486
		1487	if (coro->flags & CF_RUNNING)
		1488	PL_runops = RUNOPS_DEFAULT;
		1489	else
		1490	coro->slot->runops = RUNOPS_DEFAULT;
		1491	}
		1492	}
		1493
911	MODULE = Coro::State PACKAGE = Coro::State	1494	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
912		1495
913	PROTOTYPES: ENABLE	1496	PROTOTYPES: DISABLE
914		1497
915	BOOT:	1498	BOOT:
916	{ /* {} necessary for stoopid perl-5.6.x */	1499	{
917	#ifdef USE_ITHREADS	1500	#ifdef USE_ITHREADS
918	MUTEX_INIT (&coro_mutex);	1501	MUTEX_INIT (&coro_mutex);
919	#endif	1502	#endif
920	BOOT_PAGESIZE;	1503	BOOT_PAGESIZE;
921		1504
922	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1505	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
923	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1506	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1507
		1508	hv_sig = coro_get_hv ("SIG", TRUE);
		1509	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1510	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1511
		1512	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1513	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1514
924	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1515	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
925		1516
926	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
927	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
928	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
929	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
930		1521
931	main_mainstack = PL_mainstack;	1522	main_mainstack = PL_mainstack;
		1523	main_top_env = PL_top_env;
		1524
		1525	while (main_top_env->je_prev)
		1526	main_top_env = main_top_env->je_prev;
932		1527
933	coroapi.ver = CORO_API_VERSION;	1528	coroapi.ver = CORO_API_VERSION;
934	coroapi.transfer = api_transfer;	1529	coroapi.transfer = api_transfer;
935	}
936		1530
937	Coro::State	1531	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
938	_newprocess(args)	1532	}
939	SV * args	1533
940	PROTOTYPE: $	1534	SV *
		1535	new (char *klass, ...)
941	CODE:	1536	CODE:
942	Coro__State coro;	1537	{
		1538	struct coro *coro;
		1539	HV *hv;
		1540	int i;
943		1541
944	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
945	croak ("Coro::State::_newprocess expects an arrayref");
946
947	Newz (0, coro, 1, struct coro);	1542	Newz (0, coro, 1, struct coro);
		1543	coro->args = newAV ();
		1544	coro->flags = CF_NEW;
948		1545
949	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1546	if (coro_first) coro_first->prev = coro;
950	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1547	coro->next = coro_first;
951	/*coro->stack = 0;*/	1548	coro_first = coro;
952		1549
953	/* same as JMPENV_BOOTSTRAP */	1550	coro->hv = hv = newHV ();
954	/* we might be able to recycle start_env, but safe is safe */	1551	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
955	/*Zero(&coro->start_env, 1, JMPENV);*/	1552	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956	coro->start_env.je_ret = -1;
957	coro->start_env.je_mustcatch = TRUE;
958		1553
959	RETVAL = coro;	1554	av_extend (coro->args, items - 1);
		1555	for (i = 1; i < items; i++)
		1556	av_push (coro->args, newSVsv (ST (i)));
		1557	}
960	OUTPUT:	1558	OUTPUT:
961	RETVAL	1559	RETVAL
962		1560
		1561	# these not obviously related functions are all rolled into the same xs
		1562	# function to increase chances that they all will call transfer with the same
		1563	# stack offset
963	void	1564	void
964	transfer(prev, next, flags)	1565	_set_stacklevel (...)
965	SV *prev	1566	ALIAS:
966	SV *next	1567	Coro::State::transfer = 1
967	int flags	1568	Coro::schedule = 2
968	PROTOTYPE: @	1569	Coro::cede = 3
		1570	Coro::cede_notself = 4
969	CODE:	1571	CODE:
970	PUTBACK;	1572	{
971	SV_CORO (next, "Coro::transfer");	1573	struct transfer_args ta;
972	SV_CORO (prev, "Coro::transfer");	1574
973	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1575	switch (ix)
974	SPAGAIN;	1576	{
		1577	case 0:
		1578	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1579	ta.next = 0;
		1580	break;
		1581
		1582	case 1:
		1583	if (items != 2)
		1584	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1585
		1586	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1587	break;
		1588
		1589	case 2:
		1590	prepare_schedule (aTHX_ &ta);
		1591	break;
		1592
		1593	case 3:
		1594	prepare_cede (aTHX_ &ta);
		1595	break;
		1596
		1597	case 4:
		1598	if (!prepare_cede_notself (aTHX_ &ta))
		1599	XSRETURN_EMPTY;
		1600
		1601	break;
		1602	}
		1603
		1604	BARRIER;
		1605	TRANSFER (ta);
		1606
		1607	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1608	XSRETURN_YES;
		1609	}
		1610
		1611	bool
		1612	_destroy (SV *coro_sv)
		1613	CODE:
		1614	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1615	OUTPUT:
		1616	RETVAL
975		1617
976	void	1618	void
977	DESTROY(coro)
978	Coro::State coro
979	CODE:
980
981	if (coro->mainstack && coro->mainstack != main_mainstack)
982	{
983	struct coro temp;
984
985	PUTBACK;
986	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
987	LOAD (aTHX_ coro);
988	SPAGAIN;
989
990	destroy_stacks (aTHX);
991
992	LOAD ((&temp)); /* this will get rid of defsv etc.. */
993	SPAGAIN;
994
995	coro->mainstack = 0;
996	}
997
998	deallocate_stack (coro);
999	SvREFCNT_dec (coro->args);
1000	Safefree (coro);
1001
1002	void
1003	_exit(code)	1619	_exit (code)
1004	int code	1620	int code
1005	PROTOTYPE: $	1621	PROTOTYPE: $
1006	CODE:	1622	CODE:
1007	_exit (code);	1623	_exit (code);
1008		1624
1009	MODULE = Coro::State PACKAGE = Coro::Cont	1625	int
		1626	cctx_stacksize (int new_stacksize = 0)
		1627	CODE:
		1628	RETVAL = coro_stacksize;
		1629	if (new_stacksize)
		1630	coro_stacksize = new_stacksize;
		1631	OUTPUT:
		1632	RETVAL
1010		1633
1011	# this is slightly dirty (should expose a c-level api)	1634	int
		1635	cctx_count ()
		1636	CODE:
		1637	RETVAL = cctx_count;
		1638	OUTPUT:
		1639	RETVAL
		1640
		1641	int
		1642	cctx_idle ()
		1643	CODE:
		1644	RETVAL = cctx_idle;
		1645	OUTPUT:
		1646	RETVAL
1012		1647
1013	void	1648	void
1014	yield(...)	1649	list ()
1015	PROTOTYPE: @	1650	PPCODE:
		1651	{
		1652	struct coro *coro;
		1653	for (coro = coro_first; coro; coro = coro->next)
		1654	if (coro->hv)
		1655	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1656	}
		1657
		1658	void
		1659	call (Coro::State coro, SV *coderef)
		1660	ALIAS:
		1661	eval = 1
		1662	CODE:
		1663	{
		1664	if (coro->mainstack)
		1665	{
		1666	struct coro temp;
		1667
		1668	if (!(coro->flags & CF_RUNNING))
		1669	{
		1670	save_perl (aTHX_ &temp);
		1671	load_perl (aTHX_ coro);
		1672	}
		1673
		1674	{
		1675	dSP;
		1676	ENTER;
		1677	SAVETMPS;
		1678	PUSHMARK (SP);
		1679	PUTBACK;
		1680
		1681	if (ix)
		1682	eval_sv (coderef, 0);
		1683	else
		1684	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1685
		1686	SPAGAIN;
		1687	FREETMPS;
		1688	LEAVE;
		1689	PUTBACK;
		1690	}
		1691
		1692	if (!(coro->flags & CF_RUNNING))
		1693	{
		1694	save_perl (aTHX_ coro);
		1695	load_perl (aTHX_ &temp);
		1696	}
		1697	}
		1698	}
		1699
		1700	SV *
		1701	is_ready (Coro::State coro)
		1702	PROTOTYPE: $
		1703	ALIAS:
		1704	is_ready = CF_READY
		1705	is_running = CF_RUNNING
		1706	is_new = CF_NEW
		1707	is_destroyed = CF_DESTROYED
		1708	CODE:
		1709	RETVAL = boolSV (coro->flags & ix);
		1710	OUTPUT:
		1711	RETVAL
		1712
		1713	void
		1714	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1715
		1716	SV *
		1717	has_stack (Coro::State coro)
		1718	PROTOTYPE: $
		1719	CODE:
		1720	RETVAL = boolSV (!!coro->cctx);
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	int
		1725	is_traced (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	IV
		1733	rss (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	usecount = 1
1016	CODE:	1737	CODE:
1017	SV *yieldstack;	1738	switch (ix)
1018	SV *sv;	1739	{
1019	AV *defav = GvAV (PL_defgv);	1740	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1020	struct coro *prev, *next;	1741	case 1: RETVAL = coro->usecount; break;
1021
1022	yieldstack = *hv_fetch (
1023	(HV *)SvRV (GvSV (coro_current)),
1024	"yieldstack", sizeof ("yieldstack") - 1,
1025	0	1742	}
1026	);	1743	OUTPUT:
		1744	RETVAL
1027		1745
1028	/* set up @_ -- ugly */
1029	av_clear (defav);
1030	av_fill (defav, items - 1);
1031	while (items--)
1032	av_store (defav, items, SvREFCNT_inc (ST(items)));
1033
1034	sv = av_pop ((AV *)SvRV (yieldstack));
1035	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1036	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1037	SvREFCNT_dec (sv);
1038
1039	transfer (aTHX_ prev, next, 0);
1040		1746
1041	MODULE = Coro::State PACKAGE = Coro	1747	MODULE = Coro::State PACKAGE = Coro
1042		1748
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1749	BOOT:
1046	{	1750	{
1047	int i;	1751	int i;
		1752
		1753	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1754	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1755	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1756
		1757	coro_current = coro_get_sv ("Coro::current", FALSE);
		1758	SvREADONLY_on (coro_current);
		1759
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1760	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1761
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1762	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1763	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1764	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1765	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1766	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1767	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059		1768
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1769	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061	coro_ready[i] = newAV ();	1770	coro_ready[i] = newAV ();
1062		1771
1063	{	1772	{
1064	SV *sv = perl_get_sv("Coro::API", 1);	1773	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1774	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1065		1775
1066	coroapi.schedule = api_schedule;	1776	coroapi.schedule = api_schedule;
1067	coroapi.cede = api_cede;	1777	coroapi.cede = api_cede;
		1778	coroapi.cede_notself = api_cede_notself;
1068	coroapi.ready = api_ready;	1779	coroapi.ready = api_ready;
		1780	coroapi.is_ready = api_is_ready;
1069	coroapi.nready = &coro_nready;	1781	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1782	coroapi.current = coro_current;
1071		1783
1072	GCoroAPI = &coroapi;	1784	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1785	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1786	SvREADONLY_on (sv);
1075	}	1787	}
1076	}	1788	}
1077		1789
1078	#if !PERL_MICRO
1079
1080	void	1790	void
1081	ready(self)	1791	_set_current (SV *current)
1082	SV * self
1083	PROTOTYPE: $	1792	PROTOTYPE: $
1084	CODE:	1793	CODE:
1085	api_ready (self);	1794	SvREFCNT_dec (SvRV (coro_current));
1086		1795	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1087	#endif
1088		1796
1089	int	1797	int
		1798	prio (Coro::State coro, int newprio = 0)
		1799	ALIAS:
		1800	nice = 1
		1801	CODE:
		1802	{
		1803	RETVAL = coro->prio;
		1804
		1805	if (items > 1)
		1806	{
		1807	if (ix)
		1808	newprio = coro->prio - newprio;
		1809
		1810	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1811	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1812
		1813	coro->prio = newprio;
		1814	}
		1815	}
		1816	OUTPUT:
		1817	RETVAL
		1818
		1819	SV *
		1820	ready (SV *self)
		1821	PROTOTYPE: $
		1822	CODE:
		1823	RETVAL = boolSV (api_ready (self));
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	int
1090	nready(...)	1828	nready (...)
1091	PROTOTYPE:	1829	PROTOTYPE:
1092	CODE:	1830	CODE:
1093	RETVAL = coro_nready;	1831	RETVAL = coro_nready;
1094	OUTPUT:	1832	OUTPUT:
1095	RETVAL	1833	RETVAL
1096		1834
1097	void	1835	void
1098	schedule(...)	1836	throw (Coro::State self, SV *throw = &PL_sv_undef)
1099	PROTOTYPE:	1837	PROTOTYPE: $;$
		1838	CODE:
		1839	SvREFCNT_dec (self->throw);
		1840	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1841
		1842	# for async_pool speedup
		1843	void
		1844	_pool_1 (SV *cb)
1100	CODE:	1845	CODE:
1101	api_schedule ();	1846	{
		1847	struct coro *coro = SvSTATE (coro_current);
		1848	HV *hv = (HV *)SvRV (coro_current);
		1849	AV *defav = GvAV (PL_defgv);
		1850	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1851	AV *invoke_av;
		1852	int i, len;
		1853
		1854	if (!invoke)
		1855	croak ("\3async_pool terminate\2\n");
		1856
		1857	SvREFCNT_dec (coro->saved_deffh);
		1858	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1859
		1860	hv_store (hv, "desc", sizeof ("desc") - 1,
		1861	newSVpvn (strpair ("[async_pool]")), 0);
		1862
		1863	invoke_av = (AV *)SvRV (invoke);
		1864	len = av_len (invoke_av);
		1865
		1866	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1867
		1868	if (len > 0)
		1869	{
		1870	av_fill (defav, len - 1);
		1871	for (i = 0; i < len; ++i)
		1872	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1873	}
		1874
		1875	SvREFCNT_dec (invoke);
		1876	}
1102		1877
1103	void	1878	void
1104	cede(...)	1879	_pool_2 (SV *cb)
1105	PROTOTYPE:
1106	CODE:	1880	CODE:
1107	api_cede ();	1881	{
		1882	struct coro *coro = SvSTATE (coro_current);
1108		1883
1109	# and these are hacks	1884	sv_setsv (cb, &PL_sv_undef);
		1885
		1886	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1887	coro->saved_deffh = 0;
		1888
		1889	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1890	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1891	croak ("\3async_pool terminate\2\n");
		1892
		1893	av_clear (GvAV (PL_defgv));
		1894	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1895	newSVpvn (strpair ("[async_pool idle]")), 0);
		1896
		1897	coro->prio = 0;
		1898
		1899	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1900	api_trace (coro_current, 0);
		1901
		1902	av_push (av_async_pool, newSVsv (coro_current));
		1903	}
		1904
		1905
		1906	MODULE = Coro::State PACKAGE = Coro::AIO
		1907
1110	SV *	1908	SV *
1111	_aio_get_state ()	1909	_get_state ()
1112	CODE:	1910	CODE:
1113	{	1911	{
1114	struct {	1912	struct io_state *data;
1115	int errorno;
1116	int laststype;
1117	int laststatval;
1118	Stat_t statcache;
1119	} data;
1120		1913
		1914	RETVAL = newSV (sizeof (struct io_state));
		1915	data = (struct io_state *)SvPVX (RETVAL);
		1916	SvCUR_set (RETVAL, sizeof (struct io_state));
		1917	SvPOK_only (RETVAL);
		1918
1121	data.errorno = errno;	1919	data->errorno = errno;
1122	data.laststype = PL_laststype;	1920	data->laststype = PL_laststype;
1123	data.laststatval = PL_laststatval;	1921	data->laststatval = PL_laststatval;
1124	data.statcache = PL_statcache;	1922	data->statcache = PL_statcache;
1125
1126	RETVAL = newSVpvn ((char *)&data, sizeof data);
1127	}	1923	}
1128	OUTPUT:	1924	OUTPUT:
1129	RETVAL	1925	RETVAL
1130		1926
1131	void	1927	void
1132	_aio_set_state (char *data_)	1928	_set_state (char *data_)
1133	PROTOTYPE: $	1929	PROTOTYPE: $
1134	CODE:	1930	CODE:
1135	{	1931	{
1136	struct {	1932	struct io_state *data = (void *)data_;
1137	int errorno;
1138	int laststype;
1139	int laststatval;
1140	Stat_t statcache;
1141	} *data = (void *)data_;
1142		1933
1143	errno = data->errorno;	1934	errno = data->errorno;
1144	PL_laststype = data->laststype;	1935	PL_laststype = data->laststype;
1145	PL_laststatval = data->laststatval;	1936	PL_laststatval = data->laststatval;
1146	PL_statcache = data->statcache;	1937	PL_statcache = data->statcache;
1147	}	1938	}
		1939

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