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Comparing Coro/Coro/State.xs (file contents):
Revision 1.83 by root, Mon Nov 20 22:32:44 2006 UTC vs.
Revision 1.232 by root, Thu Apr 24 12:40:38 2008 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
		24
		25	#ifdef HAVE_MMAP
		26	# include <unistd.h>
		27	# include <sys/mman.h>
		28	# ifndef MAP_ANONYMOUS
		29	# ifdef MAP_ANON
		30	# define MAP_ANONYMOUS MAP_ANON
		31	# else
		32	# undef HAVE_MMAP
		33	# endif
		34	# endif
		35	# include <limits.h>
		36	# ifndef PAGESIZE
		37	# define PAGESIZE pagesize
		38	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		39	static long pagesize;
		40	# else
		41	# define BOOT_PAGESIZE (void)0
		42	# endif
		43	#else
		44	# define PAGESIZE 0
		45	# define BOOT_PAGESIZE (void)0
		46	#endif
		47
		48	#if CORO_USE_VALGRIND
		49	# include <valgrind/valgrind.h>
		50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
		53	#endif
		54
		55	/* the maximum number of idle cctx that will be pooled */
		56	#define MAX_IDLE_CCTX 8
		57
		58	#define PERL_VERSION_ATLEAST(a,b,c) \
		59	(PERL_REVISION > (a) \
		60	|| (PERL_REVISION == (a) \
		61	&& (PERL_VERSION > (b) \
		62	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		63
		64	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	65	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	66	# define PL_ppaddr ppaddr
14	# endif	67	# endif
15	# ifndef call_sv	68	# ifndef call_sv
16	# define call_sv perl_call_sv	69	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	80	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	81	# define IS_PADCONST(v) 0
29	# endif	82	# endif
30	#endif	83	#endif
31		84
32	#include <errno.h>	85	/* 5.8.8 */
		86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
		98	/* 5.8.7 */
		99	#ifndef SvRV_set
		100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
33		102
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	104	# 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	105	#endif
52	# include <limits.h>	106
53	# ifndef PAGESIZE	107	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	108	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	109	#endif
60	#endif
61		110
62	#define SUB_INIT "Coro::State::initialize"	111	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	112	#ifndef CORO_PREFER_PERL_FUNCTIONS
		113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
64		115
65	/* The next macro should declare a variable stacklevel that contains and approximation	116	/* 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	117	* portable way as possible. */
67	* and should be unique. */	118	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	119	#define STACKLEVEL ((void *)&stacklevel)
69		120
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		122
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	123	#if __GNUC__ >= 3
		124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
		131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
		135
		136	#define NOINLINE attribute ((noinline))
73		137
74	#include "CoroAPI.h"	138	#include "CoroAPI.h"
75		139
76	#ifdef USE_ITHREADS	140	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	141	static perl_mutex coro_mutex;
…		…
80	#else	144	#else
81	# define LOCK (void)0	145	# define LOCK (void)0
82	# define UNLOCK (void)0	146	# define UNLOCK (void)0
83	#endif	147	#endif
84		148
		149	/* helper storage struct for Coro::AIO */
		150	struct io_state
		151	{
		152	int errorno;
		153	I32 laststype;
		154	int laststatval;
		155	Stat_t statcache;
		156	};
		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
85	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
87	static HV *coro_state_stash;	162	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 */	163	static volatile SV *coro_mortal; /* will be freed after next transfer */
91		164
92	/* this is actually not only the c stack but also c registers etc... */	165	static GV *irsgv; /* $/ */
		166	static GV *stdoutgv; /* *STDOUT */
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV *hv_sig; /* %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	static struct coro_cctx *cctx_first;
		177	static int cctx_count, cctx_idle;
		178
		179	enum {
		180	CC_MAPPED = 0x01,
		181	CC_NOREUSE = 0x02, /* throw this away after tracing */
		182	CC_TRACE = 0x04,
		183	CC_TRACE_SUB = 0x08, /* trace sub calls */
		184	CC_TRACE_LINE = 0x10, /* trace each statement */
		185	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		186	};
		187
		188	/* this is a structure representing a c-level coroutine */
		189	typedef struct coro_cctx {
		190	struct coro_cctx *next;
		191
		192	/* the stack */
		193	void *sptr;
		194	size_t ssize;
		195
		196	/* cpu state */
		197	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		198	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		199	JMPENV *top_env;
		200	coro_context cctx;
		201
		202	#if CORO_USE_VALGRIND
		203	int valgrind_id;
		204	#endif
		205	unsigned char flags;
		206	} coro_cctx;
		207
		208	enum {
		209	CF_RUNNING = 0x0001, /* coroutine is running */
		210	CF_READY = 0x0002, /* coroutine is ready */
		211	CF_NEW = 0x0004, /* has never been switched to */
		212	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		213	};
		214
		215	/* the structure where most of the perl state is stored, overlaid on the cxstack */
93	typedef struct {	216	typedef struct {
94	int refcnt; /* pointer reference counter */	217	SV *defsv;
95	int usecnt; /* shared by how many coroutines */	218	AV *defav;
96	int gencnt; /* generation counter */	219	SV *errsv;
		220	SV *irsgv;
		221	#define VAR(name,type) type name;
		222	# include "state.h"
		223	#undef VAR
		224	} perl_slots;
97		225
98	coro_context cctx;	226	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99		227
100	void *sptr;	228	/* this is a structure representing a perl-level coroutine */
101	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103
104	struct coro {	229	struct coro {
105	/* the optional C context */	230	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	231	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109		232
110	/* optionally saved, might be zero */	233	/* process data */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;	234	AV *mainstack;
123	SV **stack_sp;	235	perl_slots *slot; /* basically the saved sp */
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149		236
150	/* data associated with this coroutine (initial args) */	237	AV *args; /* data associated with this coroutine (initial args) */
151	AV *args;	238	int refcnt; /* coroutines are refcounted, yes */
		239	int flags; /* CF_ flags */
		240	HV *hv; /* the perl hash associated with this coro, if any */
		241
		242	/* statistics */
		243	int usecount; /* number of transfers to this coro */
		244
		245	/* coro process data */
		246	int prio;
		247	SV *throw; /* exception to be thrown */
		248
		249	/* async_pool */
		250	SV *saved_deffh;
		251
		252	/* linked list */
		253	struct coro *next, *prev;
152	};	254	};
153		255
154	typedef struct coro *Coro__State;	256	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	257	typedef struct coro *Coro__State_or_hashref;
156		258
		259	/** Coro ********************************************************************/
		260
		261	#define PRIO_MAX 3
		262	#define PRIO_HIGH 1
		263	#define PRIO_NORMAL 0
		264	#define PRIO_LOW -1
		265	#define PRIO_IDLE -3
		266	#define PRIO_MIN -4
		267
		268	/* for Coro.pm */
		269	static SV *coro_current;
		270	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		271	static int coro_nready;
		272	static struct coro *coro_first;
		273
		274	/** lowlevel stuff **********************************************************/
		275
		276	static SV *
		277	coro_get_sv (pTHX_ const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,10,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_sv (name, create);
		282	#endif
		283	return get_sv (name, create);
		284	}
		285
		286	static AV *
		287	coro_get_av (pTHX_ const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,10,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_av (name, create);
		292	#endif
		293	return get_av (name, create);
		294	}
		295
		296	static HV *
		297	coro_get_hv (pTHX_ const char *name, int create)
		298	{
		299	#if PERL_VERSION_ATLEAST (5,10,0)
		300	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		301	get_hv (name, create);
		302	#endif
		303	return get_hv (name, create);
		304	}
		305
157	static AV *	306	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	307	coro_clone_padlist (pTHX_ CV *cv)
159	{	308	{
160	AV *padlist = CvPADLIST (cv);	309	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	310	AV *newpadlist, *newpad;
162		311
163	newpadlist = newAV ();	312	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	313	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	314	#if PERL_VERSION_ATLEAST (5,10,0)
		315	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		316	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	317	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	318	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	319	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	320	--AvFILLp (padlist);
172		321
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	322	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
208		357
209	/* casting is fun. */	358	/* casting is fun. */
210	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	359	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	free_padlist (aTHX_ padlist);	360	free_padlist (aTHX_ padlist);
212		361
213	SvREFCNT_dec (av);
214
215	return 0;	362	return 0;
216	}	363	}
217		364
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	365	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		366	#define CORO_MAGIC_type_state PERL_MAGIC_ext
219		367
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	368	static MGVTBL coro_cv_vtbl = {
		369	0, 0, 0, 0,
		370	coro_cv_free
		371	};
		372
		373	#define CORO_MAGIC(sv,type) \
		374	SvMAGIC (sv) \
		375	? SvMAGIC (sv)->mg_type == type \
		376	? SvMAGIC (sv) \
		377	: mg_find (sv, type) \
		378	: 0
		379
		380	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		381	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		382
		383	static struct coro *
		384	SvSTATE_ (pTHX_ SV *coro)
		385	{
		386	HV *stash;
		387	MAGIC *mg;
		388
		389	if (SvROK (coro))
		390	coro = SvRV (coro);
		391
		392	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		393	croak ("Coro::State object required");
		394
		395	stash = SvSTASH (coro);
		396	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		397	{
		398	/* very slow, but rare, check */
		399	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		400	croak ("Coro::State object required");
		401	}
		402
		403	mg = CORO_MAGIC_state (coro);
		404	return (struct coro *)mg->mg_ptr;
		405	}
		406
		407	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
221		408
222	/* the next two functions merely cache the padlists */	409	/* the next two functions merely cache the padlists */
223	static void	410	static void
224	get_padlist (pTHX_ CV *cv)	411	get_padlist (pTHX_ CV *cv)
225	{	412	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	413	MAGIC *mg = CORO_MAGIC_cv (cv);
		414	AV *av;
227		415
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	416	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	417	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	418	else
231	{	419	{
232	#if 0	420	#if CORO_PREFER_PERL_FUNCTIONS
233	/* this should work - but it doesn't :( */	421	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	422	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	423	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	424	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	425	SvREFCNT_dec (cp);
238	#else	426	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	427	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
242	}	430	}
243		431
244	static void	432	static void
245	put_padlist (pTHX_ CV *cv)	433	put_padlist (pTHX_ CV *cv)
246	{	434	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	435	MAGIC *mg = CORO_MAGIC_cv (cv);
		436	AV *av;
248		437
249	if (!mg)	438	if (expect_false (!mg))
250	{	439	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();
255	}
256		440
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	441	av = (AV *)mg->mg_obj;
258	}
259		442
260	#define SB do {	443	if (expect_false (AvFILLp (av) >= AvMAX (av)))
261	#define SE } while (0)	444	av_extend (av, AvMAX (av) + 1);
262		445
263	#define LOAD(state) load_state(aTHX_ (state));	446	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	447	}
265		448
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	449	/** load & save, init *******************************************************/
267		450
268	static void	451	static void
269	load_state(pTHX_ Coro__State c)	452	load_perl (pTHX_ Coro__State c)
270	{	453	{
271	PL_dowarn = c->dowarn;	454	perl_slots *slot = c->slot;
272	PL_in_eval = c->in_eval;	455	c->slot = 0;
273		456
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;	457	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		458
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	459	GvSV (PL_defgv) = slot->defsv;
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	460	GvAV (PL_defgv) = slot->defav;
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	461	GvSV (PL_errgv) = slot->errsv;
		462	GvSV (irsgv) = slot->irsgv;
		463
		464	#define VAR(name,type) PL_ ## name = slot->name;
		465	# include "state.h"
		466	#undef VAR
309		467
310	{	468	{
311	dSP;	469	dSP;
		470
312	CV *cv;	471	CV *cv;
313		472
314	/* now do the ugly restore mess */	473	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	474	while (expect_true (cv = (CV *)POPs))
316	{	475	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	476	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	477	CvDEPTH (cv) = PTR2IV (POPs);
323	}	478	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	479	}
327		480
328	PUTBACK;	481	PUTBACK;
329	}	482	}
330	}	483	}
331		484
332	static void	485	static void
333	save_state(pTHX_ Coro__State c, int flags)	486	save_perl (pTHX_ Coro__State c)
334	{	487	{
335	{	488	{
336	dSP;	489	dSP;
337	I32 cxix = cxstack_ix;	490	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	491	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	494	/*
342	* the worst thing you can imagine happens first - we have to save	495	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	496	* (and reinitialize) all cv's in the whole callchain :(
344	*/	497	*/
345		498
346	PUSHs (Nullsv);	499	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	500	/* this loop was inspired by pp_caller */
348	for (;;)	501	for (;;)
349	{	502	{
350	while (cxix >= 0)	503	while (expect_true (cxix >= 0))
351	{	504	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	505	PERL_CONTEXT *cx = &ccstk[cxix--];
353		506
354	if (CxTYPE(cx) == CXt_SUB)	507	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355	{	508	{
356	CV *cv = cx->blk_sub.cv;	509	CV *cv = cx->blk_sub.cv;
		510
357	if (CvDEPTH(cv))	511	if (expect_true (CvDEPTH (cv)))
358	{	512	{
359	EXTEND (SP, CvDEPTH(cv)*2);	513	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	514	PUSHs ((SV *)CvPADLIST (cv));
		515	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	516	PUSHs ((SV *)cv);
370		517
		518	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	519	get_padlist (aTHX_ cv);
372	}	520	}
373	}	521	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	522	}
383		523
384	if (top_si->si_type == PERLSI_MAIN)	524	if (expect_true (top_si->si_type == PERLSI_MAIN))
385	break;	525	break;
386		526
387	top_si = top_si->si_prev;	527	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	528	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	529	cxix = top_si->si_cxix;
390	}	530	}
391		531
392	PUTBACK;	532	PUTBACK;
393	}	533	}
394		534
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	535	/* allocate some space on the context stack for our purposes */
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	536	/* we manually unroll here, as usually 2 slots is enough */
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	537	if (SLOT_COUNT >= 1) CXINC;
		538	if (SLOT_COUNT >= 2) CXINC;
		539	if (SLOT_COUNT >= 3) CXINC;
		540	{
		541	int i;
		542	for (i = 3; i < SLOT_COUNT; ++i)
		543	CXINC;
		544	}
		545	cxstack_ix -= SLOT_COUNT; /* undo allocation */
398		546
399	c->dowarn = PL_dowarn;
400	c->in_eval = PL_in_eval;
401
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;	547	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;	548
406	c->op = PL_op;	549	{
407	c->curpad = PL_curpad;	550	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408	c->comppad = PL_comppad;	551
409	c->compcv = PL_compcv;	552	slot->defav = GvAV (PL_defgv);
410	c->stack_base = PL_stack_base;	553	slot->defsv = DEFSV;
411	c->stack_max = PL_stack_max;	554	slot->errsv = ERRSV;
412	c->tmps_stack = PL_tmps_stack;	555	slot->irsgv = GvSV (irsgv);
413	c->tmps_floor = PL_tmps_floor;	556
414	c->tmps_ix = PL_tmps_ix;	557	#define VAR(name,type) slot->name = PL_ ## name;
415	c->tmps_max = PL_tmps_max;	558	# include "state.h"
416	c->markstack = PL_markstack;	559	#undef VAR
417	c->markstack_ptr = PL_markstack_ptr;	560	}
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	561	}
434		562
435	/*	563	/*
436	* allocate various perl stacks. This is an exact copy	564	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	565	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	566	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	567	* not usually need a lot of stackspace.
440	*/	568	*/
		569	#if CORO_PREFER_PERL_FUNCTIONS
		570	# define coro_init_stacks init_stacks
		571	#else
441	static void	572	static void
442	coro_init_stacks (pTHX)	573	coro_init_stacks (pTHX)
443	{	574	{
444	LOCK;	575	PL_curstackinfo = new_stackinfo(32, 8);
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	576	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	577	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	578	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		579
451	PL_stack_base = AvARRAY(PL_curstack);	580	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	581	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	582	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		583
455	New(50,PL_tmps_stack,96,SV*);	584	New(50,PL_tmps_stack,32,SV*);
456	PL_tmps_floor = -1;	585	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	586	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	587	PL_tmps_max = 32;
459		588
460	New(54,PL_markstack,16,I32);	589	New(54,PL_markstack,16,I32);
461	PL_markstack_ptr = PL_markstack;	590	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	591	PL_markstack_max = PL_markstack + 16;
463		592
464	#ifdef SET_MARK_OFFSET	593	#ifdef SET_MARK_OFFSET
465	SET_MARK_OFFSET;	594	SET_MARK_OFFSET;
466	#endif	595	#endif
467		596
468	New(54,PL_scopestack,16,I32);	597	New(54,PL_scopestack,8,I32);
469	PL_scopestack_ix = 0;	598	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	599	PL_scopestack_max = 8;
471		600
472	New(54,PL_savestack,96,ANY);	601	New(54,PL_savestack,24,ANY);
473	PL_savestack_ix = 0;	602	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	603	PL_savestack_max = 24;
475		604
476	#if PERL_VERSION < 9	605	#if !PERL_VERSION_ATLEAST (5,10,0)
477	New(54,PL_retstack,8,OP*);	606	New(54,PL_retstack,4,OP*);
478	PL_retstack_ix = 0;	607	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	608	PL_retstack_max = 4;
480	#endif	609	#endif
481
482	UNLOCK;
483	}	610	}
		611	#endif
484		612
485	/*	613	/*
486	* destroy the stacks, the callchain etc...	614	* destroy the stacks, the callchain etc...
487	*/	615	*/
488	static void	616	static void
489	destroy_stacks(pTHX)	617	coro_destroy_stacks (pTHX)
490	{	618	{
491	if (!IN_DESTRUCT)
492	{
493	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);
495
496	/* sure it is, but more important: is it correct?? :/ */
497	FREETMPS;
498
499	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
500	}
501
502	while (PL_curstackinfo->si_next)	619	while (PL_curstackinfo->si_next)
503	PL_curstackinfo = PL_curstackinfo->si_next;	620	PL_curstackinfo = PL_curstackinfo->si_next;
504		621
505	while (PL_curstackinfo)	622	while (PL_curstackinfo)
506	{	623	{
507	PERL_SI *p = PL_curstackinfo->si_prev;	624	PERL_SI *p = PL_curstackinfo->si_prev;
508		625
509	{ /*D*//*remove*/
510	dSP;
511	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512	PUTBACK; /* possibly superfluous */
513	}
514
515	if (!IN_DESTRUCT)	626	if (!IN_DESTRUCT)
516	{
517	dounwind (-1);/*D*//*remove*/
518	SvREFCNT_dec (PL_curstackinfo->si_stack);	627	SvREFCNT_dec (PL_curstackinfo->si_stack);
519	}
520		628
521	Safefree (PL_curstackinfo->si_cxstack);	629	Safefree (PL_curstackinfo->si_cxstack);
522	Safefree (PL_curstackinfo);	630	Safefree (PL_curstackinfo);
523	PL_curstackinfo = p;	631	PL_curstackinfo = p;
524	}	632	}
525		633
526	Safefree (PL_tmps_stack);	634	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	635	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	636	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	637	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	638	#if !PERL_VERSION_ATLEAST (5,10,0)
531	Safefree (PL_retstack);	639	Safefree (PL_retstack);
532	#endif	640	#endif
533	}	641	}
534		642
535	static void	643	static size_t
536	allocate_stack (Coro__State ctx, int alloc)	644	coro_rss (pTHX_ struct coro *coro)
537	{	645	{
538	coro_stack *stack;	646	size_t rss = sizeof (*coro);
539		647
540	New (0, stack, 1, coro_stack);	648	if (coro->mainstack)
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{	649	{
548	#if HAVE_MMAP	650	perl_slots tmp_slot;
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	651	perl_slots *slot;
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	652
551	if (stack->sptr != (void *)-1)	653	if (coro->flags & CF_RUNNING)
552	{	654	{
553	# if STACKGUARD	655	slot = &tmp_slot;
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	656
555	# endif	657	#define VAR(name,type) slot->name = PL_ ## name;
		658	# include "state.h"
		659	#undef VAR
556	}	660	}
557	else	661	else
		662	slot = coro->slot;
		663
		664	rss += sizeof (slot->curstackinfo);
		665	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		666	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		667	rss += slot->tmps_max * sizeof (SV *);
		668	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		669	rss += slot->scopestack_max * sizeof (I32);
		670	rss += slot->savestack_max * sizeof (ANY);
		671
		672	#if !PERL_VERSION_ATLEAST (5,10,0)
		673	rss += slot->retstack_max * sizeof (OP *);
558	#endif	674	#endif
		675	}
		676
		677	return rss;
		678	}
		679
		680	/** coroutine stack handling ************************************************/
		681
		682	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		683	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		684
		685	/*
		686	* This overrides the default magic get method of %SIG elements.
		687	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		688	* and instead of tryign to save and restore the hash elements, we just provide
		689	* readback here.
		690	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		691	* not expecting this to actually change the hook. This is a potential problem
		692	* when a schedule happens then, but we ignore this.
		693	*/
		694	static int
		695	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		696	{
		697	const char *s = MgPV_nolen_const (mg);
		698
		699	if (*s == '_')
		700	{
		701	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		702	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		703	}
		704
		705	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		706	}
		707
		708	static int
		709	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		710	{
		711	const char *s = MgPV_nolen_const (mg);
		712
		713	if (*s == '_')
		714	{
		715	SV **svp = 0;
		716
		717	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		718	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		719
		720	if (svp)
559	{	721	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));	722	SV *old = *svp;
561	New (0, stack->sptr, STACKSIZE, long);	723	*svp = newSVsv (sv);
		724	SvREFCNT_dec (old);
		725	return 0;
562	}	726	}
563	}	727	}
564	else
565	stack->sptr = 0;
566		728
567	ctx->stack = stack;	729	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
568	}	730	}
569		731
570	static void	732	static void
571	deallocate_stack (Coro__State ctx)	733	coro_setup (pTHX_ struct coro *coro)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	734	{
598	/*	735	/*
599	* emulate part of the perl startup here.	736	* emulate part of the perl startup here.
600	*/	737	*/
601	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605
606	coro_init_stacks (aTHX);	738	coro_init_stacks (aTHX);
607	/*PL_curcop = 0;*/	739
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */	740	PL_runops = RUNOPS_DEFAULT;
		741	PL_curcop = &PL_compiling;
		742	PL_in_eval = EVAL_NULL;
		743	PL_comppad = 0;
		744	PL_curpm = 0;
		745	PL_curpad = 0;
		746	PL_localizing = 0;
		747	PL_dirty = 0;
		748	PL_restartop = 0;
		749	#if PERL_VERSION_ATLEAST (5,10,0)
		750	PL_parser = 0;
		751	#endif
		752
		753	/* recreate the die/warn hooks */
		754	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		755	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		756
		757	GvSV (PL_defgv) = newSV (0);
		758	GvAV (PL_defgv) = coro->args; coro->args = 0;
		759	GvSV (PL_errgv) = newSV (0);
		760	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		761	PL_rs = newSVsv (GvSV (irsgv));
		762	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		763
		764	{
		765	dSP;
		766	LOGOP myop;
		767
		768	Zero (&myop, 1, LOGOP);
		769	myop.op_next = Nullop;
		770	myop.op_flags = OPf_WANT_VOID;
		771
		772	PUSHMARK (SP);
		773	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		774	PUTBACK;
		775	PL_op = (OP *)&myop;
		776	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		777	SPAGAIN;
		778	}
		779
		780	/* this newly created coroutine might be run on an existing cctx which most
		781	* likely was suspended in set_stacklevel, called from entersub.
		782	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		783	* so we ENTER here for symmetry
		784	*/
		785	ENTER;
		786	}
		787
		788	static void
		789	coro_destroy (pTHX_ struct coro *coro)
		790	{
		791	if (!IN_DESTRUCT)
		792	{
		793	/* restore all saved variables and stuff */
		794	LEAVE_SCOPE (0);
		795	assert (PL_tmps_floor == -1);
		796
		797	/* free all temporaries */
		798	FREETMPS;
		799	assert (PL_tmps_ix == -1);
		800
		801	/* unwind all extra stacks */
		802	POPSTACK_TO (PL_mainstack);
		803
		804	/* unwind main stack */
		805	dounwind (-1);
		806	}
		807
		808	SvREFCNT_dec (GvSV (PL_defgv));
609	SvREFCNT_dec (GvAV (PL_defgv));	809	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	810	SvREFCNT_dec (GvSV (PL_errgv));
		811	SvREFCNT_dec (PL_defoutgv);
		812	SvREFCNT_dec (PL_rs);
		813	SvREFCNT_dec (GvSV (irsgv));
611		814
612	SPAGAIN;	815	SvREFCNT_dec (PL_diehook);
		816	SvREFCNT_dec (PL_warnhook);
		817
		818	SvREFCNT_dec (coro->saved_deffh);
		819	SvREFCNT_dec (coro->throw);
613		820
614	if (ctx->stack)	821	coro_destroy_stacks (aTHX);
615	{
616	ctx->cursp = 0;
617
618	PUSHMARK(SP);
619	PUTBACK;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
621
622	if (SvTRUE (ERRSV))
623	croak (NULL);
624	else
625	croak ("FATAL: CCTXT coroutine returned!");
626	}
627	else
628	{
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;
649
650	ENTER; /* necessary e.g. for dounwind */
651	}
652	}	822	}
653		823
654	static void	824	static void
655	continue_coro (void *arg)	825	free_coro_mortal (pTHX)
656	{	826	{
657	/*	827	if (expect_true (coro_mortal))
658	* this is a _very_ stripped down perl interpreter ;)	828	{
659	*/	829	SvREFCNT_dec (coro_mortal);
660	dTHX;	830	coro_mortal = 0;
661	Coro__State ctx = (Coro__State)arg;
662
663	PL_top_env = &PL_start_env;
664
665	ctx->cursp = 0;
666	PL_op = PL_op->op_next;
667	CALLRUNOPS(aTHX);
668
669	abort ();
670	}
671
672	static void
673	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
674	{
675	dSTACKLEVEL;
676
677	if (prev != next)
678	{	831	}
679	/* has this coro been created yet? */	832	}
680	if (next->mainstack)	833
		834	static int
		835	runops_trace (pTHX)
		836	{
		837	COP *oldcop = 0;
		838	int oldcxix = -2;
		839	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		840	coro_cctx *cctx = coro->cctx;
		841
		842	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		843	{
		844	PERL_ASYNC_CHECK ();
		845
		846	if (cctx->flags & CC_TRACE_ALL)
681	{	847	{
682	LOCK;	848	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
683	SAVE (prev, flags);
684	LOAD (next);
685	UNLOCK;
686
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{	849	{
694	if (!prev->stack)	850	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
695	allocate_stack (prev, 0);	851	SV **bot, **top;
696	else if (prev->cursp != stacklevel	852	AV *av = newAV (); /* return values */
697	&& prev->stack->usecnt > 1)	853	SV **cb;
		854	dSP;
		855
		856	GV *gv = CvGV (cx->blk_sub.cv);
		857	SV *fullname = sv_2mortal (newSV (0));
		858	if (isGV (gv))
		859	gv_efullname3 (fullname, gv, 0);
		860
		861	bot = PL_stack_base + cx->blk_oldsp + 1;
		862	top = cx->blk_gimme == G_ARRAY ? SP + 1
		863	: cx->blk_gimme == G_SCALAR ? bot + 1
		864	: bot;
		865
		866	av_extend (av, top - bot);
		867	while (bot < top)
		868	av_push (av, SvREFCNT_inc (*bot++));
		869
		870	PL_runops = RUNOPS_DEFAULT;
		871	ENTER;
		872	SAVETMPS;
		873	EXTEND (SP, 3);
		874	PUSHMARK (SP);
		875	PUSHs (&PL_sv_no);
		876	PUSHs (fullname);
		877	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		878	PUTBACK;
		879	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		880	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		881	SPAGAIN;
		882	FREETMPS;
		883	LEAVE;
		884	PL_runops = runops_trace;
		885	}
		886
		887	if (oldcop != PL_curcop)
		888	{
		889	oldcop = PL_curcop;
		890
		891	if (PL_curcop != &PL_compiling)
698	{	892	{
699	prev->gencnt = ++prev->stack->gencnt;	893	SV **cb;
700	prev->stack->usecnt = 1;
701	}
702		894
703	/* has our stack been invalidated? */	895	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{	896	{
706	deallocate_stack (next);	897	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
707	allocate_stack (next, 1);	898
708	coro_create (&(next->stack->cctx),	899	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
709	continue_coro, (void *)next,	900	{
710	next->stack->sptr, labs (next->stack->ssize));	901	runops_proc_t old_runops = PL_runops;
		902	dSP;
		903	GV *gv = CvGV (cx->blk_sub.cv);
		904	SV *fullname = sv_2mortal (newSV (0));
		905
		906	if (isGV (gv))
		907	gv_efullname3 (fullname, gv, 0);
		908
		909	PL_runops = RUNOPS_DEFAULT;
		910	ENTER;
		911	SAVETMPS;
		912	EXTEND (SP, 3);
		913	PUSHMARK (SP);
		914	PUSHs (&PL_sv_yes);
		915	PUSHs (fullname);
		916	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		917	PUTBACK;
		918	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		919	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		920	SPAGAIN;
		921	FREETMPS;
		922	LEAVE;
		923	PL_runops = runops_trace;
		924	}
		925
		926	oldcxix = cxstack_ix;
711	}	927	}
712		928
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	929	if (cctx->flags & CC_TRACE_LINE)
714	prev->cursp = stacklevel;
715	/* don't add any code here */
716	}
717	else
718	next->cursp = stacklevel;
719	}
720	else if (next->tmps_ix == -2)
721	croak ("tried to transfer to running coroutine");
722	else
723	{
724	LOCK;
725	SAVE (prev, -1); /* first get rid of the old state */
726	UNLOCK;
727
728	/* create the coroutine for the first time */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733
734	/* the new coroutine starts with start_env again */
735	PL_top_env = &PL_start_env;
736
737	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
738	{	930	{
739	setup_coro (next);	931	dSP;
740	next->cursp = stacklevel;
741		932
742	prev->stack->refcnt++;	933	PL_runops = RUNOPS_DEFAULT;
743	prev->stack->usecnt++;	934	ENTER;
744	next->stack = prev->stack;	935	SAVETMPS;
745	next->gencnt = prev->gencnt;	936	EXTEND (SP, 3);
		937	PL_runops = RUNOPS_DEFAULT;
		938	PUSHMARK (SP);
		939	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		940	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		941	PUTBACK;
		942	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		943	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		944	SPAGAIN;
		945	FREETMPS;
		946	LEAVE;
		947	PL_runops = runops_trace;
746	}	948	}
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	}	949	}
758	}	950	}
		951	}
		952	}
		953
		954	TAINT_NOT;
		955	return 0;
		956	}
		957
		958	/* inject a fake call to Coro::State::_cctx_init into the execution */
		959	/* _cctx_init should be careful, as it could be called at almost any time */
		960	/* during execution of a perl program */
		961	static void NOINLINE
		962	cctx_prepare (pTHX_ coro_cctx *cctx)
		963	{
		964	dSP;
		965	LOGOP myop;
		966
		967	PL_top_env = &PL_start_env;
		968
		969	if (cctx->flags & CC_TRACE)
		970	PL_runops = runops_trace;
		971
		972	Zero (&myop, 1, LOGOP);
		973	myop.op_next = PL_op;
		974	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		975
		976	PUSHMARK (SP);
		977	EXTEND (SP, 2);
		978	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		979	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		980	PUTBACK;
		981	PL_op = (OP *)&myop;
		982	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		983	SPAGAIN;
		984	}
		985
		986	/*
		987	* this is a _very_ stripped down perl interpreter ;)
		988	*/
		989	static void
		990	cctx_run (void *arg)
		991	{
		992	dTHX;
		993
		994	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		995	UNLOCK;
		996
		997	/* we now skip the entersub that lead to transfer() */
		998	PL_op = PL_op->op_next;
		999
		1000	/* inject a fake subroutine call to cctx_init */
		1001	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1002
		1003	/* somebody or something will hit me for both perl_run and PL_restartop */
		1004	PL_restartop = PL_op;
		1005	perl_run (PL_curinterp);
		1006
		1007	/*
		1008	* If perl-run returns we assume exit() was being called or the coro
		1009	* fell off the end, which seems to be the only valid (non-bug)
		1010	* reason for perl_run to return. We try to exit by jumping to the
		1011	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1012	* coroutine as Coro has no such concept
		1013	*/
		1014	PL_top_env = main_top_env;
		1015	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1016	}
		1017
		1018	static coro_cctx *
		1019	cctx_new ()
		1020	{
		1021	coro_cctx *cctx;
		1022	void *stack_start;
		1023	size_t stack_size;
		1024
		1025	++cctx_count;
		1026
		1027	Newz (0, cctx, 1, coro_cctx);
		1028
		1029	#if HAVE_MMAP
		1030	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1031	/* mmap supposedly does allocate-on-write for us */
		1032	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1033
		1034	if (cctx->sptr != (void *)-1)
		1035	{
		1036	# if CORO_STACKGUARD
		1037	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1038	# endif
		1039	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1040	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1041	cctx->flags |= CC_MAPPED;
		1042	}
		1043	else
		1044	#endif
		1045	{
		1046	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1047	New (0, cctx->sptr, coro_stacksize, long);
		1048
		1049	if (!cctx->sptr)
		1050	{
		1051	perror ("FATAL: unable to allocate stack for coroutine");
		1052	_exit (EXIT_FAILURE);
		1053	}
		1054
		1055	stack_start = cctx->sptr;
		1056	stack_size = cctx->ssize;
		1057	}
		1058
		1059	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1060	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1061
		1062	return cctx;
		1063	}
		1064
		1065	static void
		1066	cctx_destroy (coro_cctx *cctx)
		1067	{
		1068	if (!cctx)
		1069	return;
		1070
		1071	--cctx_count;
		1072
		1073	#if CORO_USE_VALGRIND
		1074	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1075	#endif
		1076
		1077	#if HAVE_MMAP
		1078	if (cctx->flags & CC_MAPPED)
		1079	munmap (cctx->sptr, cctx->ssize);
		1080	else
		1081	#endif
		1082	Safefree (cctx->sptr);
		1083
		1084	Safefree (cctx);
		1085	}
		1086
		1087	/* wether this cctx should be destructed */
		1088	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1089
		1090	static coro_cctx *
		1091	cctx_get (pTHX)
		1092	{
		1093	while (expect_true (cctx_first))
		1094	{
		1095	coro_cctx *cctx = cctx_first;
		1096	cctx_first = cctx->next;
		1097	--cctx_idle;
		1098
		1099	if (expect_true (!CCTX_EXPIRED (cctx)))
		1100	return cctx;
		1101
		1102	cctx_destroy (cctx);
		1103	}
		1104
		1105	return cctx_new ();
		1106	}
		1107
		1108	static void
		1109	cctx_put (coro_cctx *cctx)
		1110	{
		1111	/* free another cctx if overlimit */
		1112	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1113	{
		1114	coro_cctx *first = cctx_first;
		1115	cctx_first = first->next;
		1116	--cctx_idle;
		1117
		1118	cctx_destroy (first);
		1119	}
		1120
		1121	++cctx_idle;
		1122	cctx->next = cctx_first;
		1123	cctx_first = cctx;
		1124	}
		1125
		1126	/** coroutine switching *****************************************************/
		1127
		1128	static void
		1129	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1130	{
		1131	if (expect_true (prev != next))
		1132	{
		1133	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1134	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1135
		1136	if (expect_false (next->flags & CF_RUNNING))
		1137	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1138
		1139	if (expect_false (next->flags & CF_DESTROYED))
		1140	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1141
		1142	#if !PERL_VERSION_ATLEAST (5,10,0)
		1143	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1144	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1145	#endif
		1146	}
		1147	}
		1148
		1149	/* always use the TRANSFER macro */
		1150	static void NOINLINE
		1151	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
		1152	{
		1153	dSTACKLEVEL;
		1154	static volatile int has_throw;
		1155
		1156	/* sometimes transfer is only called to set idle_sp */
		1157	if (expect_false (!next))
		1158	{
		1159	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1160	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1161	}
		1162	else if (expect_true (prev != next))
		1163	{
		1164	coro_cctx *prev__cctx;
		1165
		1166	if (expect_false (prev->flags & CF_NEW))
		1167	{
		1168	/* create a new empty context */
		1169	Newz (0, prev->cctx, 1, coro_cctx);
		1170	prev->flags &= ~CF_NEW;
		1171	prev->flags |= CF_RUNNING;
		1172	}
		1173
		1174	prev->flags &= ~CF_RUNNING;
		1175	next->flags |= CF_RUNNING;
		1176
		1177	LOCK;
		1178
		1179	/* first get rid of the old state */
		1180	save_perl (aTHX_ prev);
		1181
		1182	if (expect_false (next->flags & CF_NEW))
		1183	{
		1184	/* need to start coroutine */
		1185	next->flags &= ~CF_NEW;
		1186	/* setup coroutine call */
		1187	coro_setup (aTHX_ next);
		1188	}
759	else	1189	else
		1190	load_perl (aTHX_ next);
		1191
		1192	prev__cctx = prev->cctx;
		1193
		1194	/* possibly "free" the cctx */
		1195	if (expect_true (
		1196	prev__cctx->idle_sp == STACKLEVEL
		1197	&& !(prev__cctx->flags & CC_TRACE)
		1198	&& !force_cctx
		1199	))
		1200	{
		1201	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1202	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1203
		1204	prev->cctx = 0;
		1205
		1206	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1207	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1208	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1209	if (!next->cctx)
		1210	next->cctx = cctx_get (aTHX);
		1211
		1212	cctx_put (prev__cctx);
		1213	}
		1214
		1215	++next->usecount;
		1216
		1217	if (expect_true (!next->cctx))
		1218	next->cctx = cctx_get (aTHX);
		1219
		1220	has_throw = !!next->throw;
		1221
		1222	if (expect_false (prev__cctx != next->cctx))
		1223	{
		1224	prev__cctx->top_env = PL_top_env;
		1225	PL_top_env = next->cctx->top_env;
		1226	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1227	}
		1228
		1229	free_coro_mortal (aTHX);
		1230	UNLOCK;
		1231
		1232	if (expect_false (has_throw))
		1233	{
		1234	struct coro *coro = SvSTATE (coro_current);
		1235
		1236	if (coro->throw)
760	{	1237	{
		1238	SV *exception = coro->throw;
		1239	coro->throw = 0;
		1240	sv_setsv (ERRSV, exception);
761	setup_coro (next);	1241	croak (0);
762	next->cursp = stacklevel;
763	}	1242	}
764	}	1243	}
765	}	1244	}
		1245	}
		1246
		1247	struct transfer_args
		1248	{
		1249	struct coro *prev, *next;
		1250	};
		1251
		1252	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1253	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1254
		1255	/** high level stuff ********************************************************/
		1256
		1257	static int
		1258	coro_state_destroy (pTHX_ struct coro *coro)
		1259	{
		1260	if (coro->flags & CF_DESTROYED)
		1261	return 0;
		1262
		1263	coro->flags |= CF_DESTROYED;
		1264
		1265	if (coro->flags & CF_READY)
		1266	{
		1267	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1268	/* alternative: look through all ready queues and remove the coro */
		1269	LOCK;
		1270	--coro_nready;
		1271	UNLOCK;
		1272	}
		1273	else
		1274	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1275
		1276	if (coro->mainstack && coro->mainstack != main_mainstack)
		1277	{
		1278	struct coro temp;
		1279
		1280	if (coro->flags & CF_RUNNING)
		1281	croak ("FATAL: tried to destroy currently running coroutine");
		1282
		1283	save_perl (aTHX_ &temp);
		1284	load_perl (aTHX_ coro);
		1285
		1286	coro_destroy (aTHX_ coro);
		1287
		1288	load_perl (aTHX_ &temp);
		1289
		1290	coro->slot = 0;
		1291	}
		1292
		1293	cctx_destroy (coro->cctx);
		1294	SvREFCNT_dec (coro->args);
		1295
		1296	if (coro->next) coro->next->prev = coro->prev;
		1297	if (coro->prev) coro->prev->next = coro->next;
		1298	if (coro == coro_first) coro_first = coro->next;
		1299
		1300	return 1;
		1301	}
		1302
		1303	static int
		1304	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1305	{
		1306	struct coro *coro = (struct coro *)mg->mg_ptr;
		1307	mg->mg_ptr = 0;
		1308
		1309	coro->hv = 0;
		1310
		1311	if (--coro->refcnt < 0)
		1312	{
		1313	coro_state_destroy (aTHX_ coro);
		1314	Safefree (coro);
		1315	}
		1316
		1317	return 0;
		1318	}
		1319
		1320	static int
		1321	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1322	{
		1323	struct coro *coro = (struct coro *)mg->mg_ptr;
		1324
		1325	++coro->refcnt;
		1326
		1327	return 0;
		1328	}
		1329
		1330	static MGVTBL coro_state_vtbl = {
		1331	0, 0, 0, 0,
		1332	coro_state_free,
		1333	0,
		1334	#ifdef MGf_DUP
		1335	coro_state_dup,
		1336	#else
		1337	# define MGf_DUP 0
		1338	#endif
		1339	};
		1340
		1341	static void
		1342	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1343	{
		1344	ta->prev = SvSTATE (prev_sv);
		1345	ta->next = SvSTATE (next_sv);
		1346	TRANSFER_CHECK (*ta);
		1347	}
		1348
		1349	static void
		1350	api_transfer (SV *prev_sv, SV *next_sv)
		1351	{
		1352	dTHX;
		1353	struct transfer_args ta;
		1354
		1355	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1356	TRANSFER (ta, 1);
		1357	}
		1358
		1359	/** Coro ********************************************************************/
		1360
		1361	static void
		1362	coro_enq (pTHX_ SV *coro_sv)
		1363	{
		1364	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1365	}
		1366
		1367	static SV *
		1368	coro_deq (pTHX)
		1369	{
		1370	int prio;
		1371
		1372	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1373	if (AvFILLp (coro_ready [prio]) >= 0)
		1374	return av_shift (coro_ready [prio]);
		1375
		1376	return 0;
		1377	}
		1378
		1379	static int
		1380	api_ready (SV *coro_sv)
		1381	{
		1382	dTHX;
		1383	struct coro *coro;
		1384
		1385	if (SvROK (coro_sv))
		1386	coro_sv = SvRV (coro_sv);
		1387
		1388	coro = SvSTATE (coro_sv);
		1389
		1390	if (coro->flags & CF_READY)
		1391	return 0;
		1392
		1393	coro->flags |= CF_READY;
766		1394
767	LOCK;	1395	LOCK;
768	if (coro_mortal)	1396	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
769	{	1397	++coro_nready;
770	SvREFCNT_dec (coro_mortal);
771	coro_mortal = 0;
772	}
773	UNLOCK;	1398	UNLOCK;
774	}
775		1399
776	#define SV_CORO(sv,func) \	1400	return 1;
777	do { \	1401	}
778	if (SvROK (sv)) \
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		1402
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))	1403	static int
		1404	api_is_ready (SV *coro_sv)
		1405	{
		1406	dTHX;
		1407	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1408	}
798		1409
799	static void	1410	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1411	prepare_schedule (pTHX_ struct transfer_args *ta)
801	{	1412	{
802	SV_CORO (prev, "Coro::transfer");	1413	SV *prev_sv, *next_sv;
803	SV_CORO (next, "Coro::transfer");
804		1414
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1415	for (;;)
806	}	1416	{
		1417	LOCK;
		1418	next_sv = coro_deq (aTHX);
807		1419
808	/** Coro ********************************************************************/	1420	/* nothing to schedule: call the idle handler */
		1421	if (expect_false (!next_sv))
		1422	{
		1423	dSP;
		1424	UNLOCK;
809		1425
810	#define PRIO_MAX 3	1426	ENTER;
811	#define PRIO_HIGH 1	1427	SAVETMPS;
812	#define PRIO_NORMAL 0
813	#define PRIO_LOW -1
814	#define PRIO_IDLE -3
815	#define PRIO_MIN -4
816		1428
817	/* for Coro.pm */	1429	PUSHMARK (SP);
818	static GV *coro_current, *coro_idle;	1430	PUTBACK;
819	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	1431	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
820	static int coro_nready;	1432	SPAGAIN;
		1433
		1434	FREETMPS;
		1435	LEAVE;
		1436	continue;
		1437	}
		1438
		1439	ta->next = SvSTATE (next_sv);
		1440
		1441	/* cannot transfer to destroyed coros, skip and look for next */
		1442	if (expect_false (ta->next->flags & CF_DESTROYED))
		1443	{
		1444	UNLOCK;
		1445	SvREFCNT_dec (next_sv);
		1446	/* coro_nready is already taken care of by destroy */
		1447	continue;
		1448	}
		1449
		1450	--coro_nready;
		1451	UNLOCK;
		1452	break;
		1453	}
		1454
		1455	/* free this only after the transfer */
		1456	prev_sv = SvRV (coro_current);
		1457	ta->prev = SvSTATE (prev_sv);
		1458	TRANSFER_CHECK (*ta);
		1459	assert (ta->next->flags & CF_READY);
		1460	ta->next->flags &= ~CF_READY;
		1461	SvRV_set (coro_current, next_sv);
		1462
		1463	LOCK;
		1464	free_coro_mortal (aTHX);
		1465	coro_mortal = prev_sv;
		1466	UNLOCK;
		1467	}
821		1468
822	static void	1469	static void
823	coro_enq (pTHX_ SV *sv)	1470	prepare_cede (pTHX_ struct transfer_args *ta)
824	{	1471	{
825	SV **xprio;	1472	api_ready (coro_current);
826	int prio;	1473	prepare_schedule (aTHX_ ta);
		1474	}
827		1475
828	if (SvTYPE (sv) != SVt_PVHV)	1476	static int
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");	1477	prepare_cede_notself (pTHX_ struct transfer_args *ta)
830		1478	{
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);
839	coro_nready++;	1479	if (coro_nready)
840	}
841
842	static SV *
843	coro_deq (pTHX_ int min_prio)
844	{
845	int prio = PRIO_MAX - PRIO_MIN;
846
847	min_prio -= PRIO_MIN;
848	if (min_prio < 0)
849	min_prio = 0;
850
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (AvFILLp (coro_ready [prio]) >= 0)
853	{	1480	{
854	coro_nready--;	1481	SV *prev = SvRV (coro_current);
855	return av_shift (coro_ready [prio]);	1482	prepare_schedule (aTHX_ ta);
		1483	api_ready (prev);
		1484	return 1;
856	}	1485	}
857		1486	else
858	return 0;	1487	return 0;
859	}
860
861	static void
862	api_ready (SV *coro)
863	{
864	dTHX;
865
866	if (SvROK (coro))
867	coro = SvRV (coro);
868
869	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));
871	UNLOCK;
872	}	1488	}
873		1489
874	static void	1490	static void
875	api_schedule (void)	1491	api_schedule (void)
876	{	1492	{
877	dTHX;	1493	dTHX;
		1494	struct transfer_args ta;
878		1495
879	SV *prev, *next;	1496	prepare_schedule (aTHX_ &ta);
		1497	TRANSFER (ta, 1);
		1498	}
880		1499
881	LOCK;	1500	static int
		1501	api_cede (void)
		1502	{
		1503	dTHX;
		1504	struct transfer_args ta;
882		1505
883	prev = SvRV (GvSV (coro_current));	1506	prepare_cede (aTHX_ &ta);
884	next = coro_deq (aTHX_ PRIO_MIN);
885		1507
886	if (!next)	1508	if (expect_true (ta.prev != ta.next))
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1509	{
		1510	TRANSFER (ta, 1);
		1511	return 1;
		1512	}
		1513	else
		1514	return 0;
		1515	}
888		1516
889	/* free this only after the transfer */	1517	static int
890	coro_mortal = prev;	1518	api_cede_notself (void)
891	SV_CORO (prev, "Coro::schedule");	1519	{
		1520	dTHX;
		1521	struct transfer_args ta;
892		1522
893	SvRV (GvSV (coro_current)) = next;	1523	if (prepare_cede_notself (aTHX_ &ta))
894		1524	{
895	SV_CORO (next, "Coro::schedule");	1525	TRANSFER (ta, 1);
896		1526	return 1;
897	UNLOCK;	1527	}
898		1528	else
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1529	return 0;
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}	1530	}
902		1531
903	static void	1532	static void
904	api_cede (void)	1533	api_trace (SV *coro_sv, int flags)
905	{	1534	{
906	dTHX;	1535	dTHX;
		1536	struct coro *coro = SvSTATE (coro_sv);
907		1537
908	LOCK;	1538	if (flags & CC_TRACE)
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1539	{
910	UNLOCK;	1540	if (!coro->cctx)
		1541	coro->cctx = cctx_new ();
		1542	else if (!(coro->cctx->flags & CC_TRACE))
		1543	croak ("cannot enable tracing on coroutine with custom stack");
911		1544
912	api_schedule ();	1545	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
913	}	1546	}
		1547	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1548	{
		1549	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
914		1550
		1551	if (coro->flags & CF_RUNNING)
		1552	PL_runops = RUNOPS_DEFAULT;
		1553	else
		1554	coro->slot->runops = RUNOPS_DEFAULT;
		1555	}
		1556	}
		1557
915	MODULE = Coro::State PACKAGE = Coro::State	1558	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1559
917	PROTOTYPES: ENABLE	1560	PROTOTYPES: DISABLE
918		1561
919	BOOT:	1562	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1563	{
921	#ifdef USE_ITHREADS	1564	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1565	MUTEX_INIT (&coro_mutex);
923	#endif	1566	#endif
924	BOOT_PAGESIZE;	1567	BOOT_PAGESIZE;
925		1568
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1569	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1570	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1571
		1572	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1573	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1574	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1575	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1576
		1577	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1578	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1579	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1580
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1581	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1582
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1583	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1584	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1585	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1586	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934		1587
935	main_mainstack = PL_mainstack;	1588	main_mainstack = PL_mainstack;
		1589	main_top_env = PL_top_env;
		1590
		1591	while (main_top_env->je_prev)
		1592	main_top_env = main_top_env->je_prev;
936		1593
937	coroapi.ver = CORO_API_VERSION;	1594	coroapi.ver = CORO_API_VERSION;
		1595	coroapi.rev = CORO_API_REVISION;
938	coroapi.transfer = api_transfer;	1596	coroapi.transfer = api_transfer;
939	}
940		1597
941	Coro::State	1598	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1599	}
943	SV * args	1600
944	PROTOTYPE: $	1601	SV *
		1602	new (char *klass, ...)
945	CODE:	1603	CODE:
946	Coro__State coro;	1604	{
		1605	struct coro *coro;
		1606	MAGIC *mg;
		1607	HV *hv;
		1608	int i;
947		1609
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);	1610	Newz (0, coro, 1, struct coro);
		1611	coro->args = newAV ();
		1612	coro->flags = CF_NEW;
952		1613
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1614	if (coro_first) coro_first->prev = coro;
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1615	coro->next = coro_first;
955	/*coro->stack = 0;*/	1616	coro_first = coro;
956		1617
957	RETVAL = coro;	1618	coro->hv = hv = newHV ();
		1619	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1620	mg->mg_flags |= MGf_DUP;
		1621	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1622
		1623	av_extend (coro->args, items - 1);
		1624	for (i = 1; i < items; i++)
		1625	av_push (coro->args, newSVsv (ST (i)));
		1626	}
958	OUTPUT:	1627	OUTPUT:
959	RETVAL	1628	RETVAL
960		1629
		1630	# these not obviously related functions are all rolled into the same xs
		1631	# function to increase chances that they all will call transfer with the same
		1632	# stack offset
961	void	1633	void
962	transfer(prev, next, flags)	1634	_set_stacklevel (...)
963	SV *prev	1635	ALIAS:
964	SV *next	1636	Coro::State::transfer = 1
965	int flags	1637	Coro::schedule = 2
966	PROTOTYPE: @	1638	Coro::cede = 3
		1639	Coro::cede_notself = 4
967	CODE:	1640	CODE:
		1641	{
		1642	struct transfer_args ta;
		1643
968	PUTBACK;	1644	PUTBACK;
969	SV_CORO (next, "Coro::transfer");	1645	switch (ix)
970	SV_CORO (prev, "Coro::transfer");	1646	{
971	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1647	case 0:
		1648	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1649	ta.next = 0;
		1650	break;
		1651
		1652	case 1:
		1653	if (items != 2)
		1654	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1655
		1656	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1657	break;
		1658
		1659	case 2:
		1660	prepare_schedule (aTHX_ &ta);
		1661	break;
		1662
		1663	case 3:
		1664	prepare_cede (aTHX_ &ta);
		1665	break;
		1666
		1667	case 4:
		1668	if (!prepare_cede_notself (aTHX_ &ta))
		1669	XSRETURN_EMPTY;
		1670
		1671	break;
		1672	}
972	SPAGAIN;	1673	SPAGAIN;
973		1674
		1675	BARRIER;
		1676	PUTBACK;
		1677	TRANSFER (ta, 0);
		1678	SPAGAIN; /* might be the sp of a different coroutine now */
		1679	/* be extra careful not to ever do anything after TRANSFER */
		1680	}
		1681
		1682	bool
		1683	_destroy (SV *coro_sv)
		1684	CODE:
		1685	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1686	OUTPUT:
		1687	RETVAL
		1688
974	void	1689	void
975	DESTROY(coro)
976	Coro::State coro
977	CODE:
978
979	if (coro->mainstack && coro->mainstack != main_mainstack)
980	{
981	struct coro temp;
982
983	PUTBACK;
984	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
985	LOAD (aTHX_ coro);
986	SPAGAIN;
987
988	destroy_stacks (aTHX);
989
990	LOAD ((&temp)); /* this will get rid of defsv etc.. */
991	SPAGAIN;
992
993	coro->mainstack = 0;
994	}
995
996	deallocate_stack (coro);
997	SvREFCNT_dec (coro->args);
998	Safefree (coro);
999
1000	void
1001	_exit(code)	1690	_exit (code)
1002	int code	1691	int code
1003	PROTOTYPE: $	1692	PROTOTYPE: $
1004	CODE:	1693	CODE:
1005	_exit (code);	1694	_exit (code);
1006		1695
1007	MODULE = Coro::State PACKAGE = Coro::Cont	1696	int
		1697	cctx_stacksize (int new_stacksize = 0)
		1698	CODE:
		1699	RETVAL = coro_stacksize;
		1700	if (new_stacksize)
		1701	coro_stacksize = new_stacksize;
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	int
		1706	cctx_count ()
		1707	CODE:
		1708	RETVAL = cctx_count;
		1709	OUTPUT:
		1710	RETVAL
		1711
		1712	int
		1713	cctx_idle ()
		1714	CODE:
		1715	RETVAL = cctx_idle;
		1716	OUTPUT:
		1717	RETVAL
1008		1718
1009	void	1719	void
1010	yield(...)	1720	list ()
1011	PROTOTYPE: @	1721	PPCODE:
		1722	{
		1723	struct coro *coro;
		1724	for (coro = coro_first; coro; coro = coro->next)
		1725	if (coro->hv)
		1726	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1727	}
		1728
		1729	void
		1730	call (Coro::State coro, SV *coderef)
		1731	ALIAS:
		1732	eval = 1
		1733	CODE:
		1734	{
		1735	if (coro->mainstack)
		1736	{
		1737	struct coro temp;
		1738
		1739	if (!(coro->flags & CF_RUNNING))
		1740	{
		1741	PUTBACK;
		1742	save_perl (aTHX_ &temp);
		1743	load_perl (aTHX_ coro);
		1744	}
		1745
		1746	{
		1747	dSP;
		1748	ENTER;
		1749	SAVETMPS;
		1750	PUTBACK;
		1751	PUSHSTACK;
		1752	PUSHMARK (SP);
		1753
		1754	if (ix)
		1755	eval_sv (coderef, 0);
		1756	else
		1757	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1758
		1759	POPSTACK;
		1760	SPAGAIN;
		1761	FREETMPS;
		1762	LEAVE;
		1763	PUTBACK;
		1764	}
		1765
		1766	if (!(coro->flags & CF_RUNNING))
		1767	{
		1768	save_perl (aTHX_ coro);
		1769	load_perl (aTHX_ &temp);
		1770	SPAGAIN;
		1771	}
		1772	}
		1773	}
		1774
		1775	SV *
		1776	is_ready (Coro::State coro)
		1777	PROTOTYPE: $
		1778	ALIAS:
		1779	is_ready = CF_READY
		1780	is_running = CF_RUNNING
		1781	is_new = CF_NEW
		1782	is_destroyed = CF_DESTROYED
		1783	CODE:
		1784	RETVAL = boolSV (coro->flags & ix);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	void
		1789	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1790
		1791	SV *
		1792	has_stack (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = boolSV (!!coro->cctx);
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	int
		1800	is_traced (Coro::State coro)
		1801	PROTOTYPE: $
		1802	CODE:
		1803	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1804	OUTPUT:
		1805	RETVAL
		1806
		1807	IV
		1808	rss (Coro::State coro)
		1809	PROTOTYPE: $
		1810	ALIAS:
		1811	usecount = 1
1012	CODE:	1812	CODE:
1013	SV *yieldstack;	1813	switch (ix)
1014	SV *sv;	1814	{
1015	AV *defav = GvAV (PL_defgv);	1815	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1016	struct coro *prev, *next;	1816	case 1: RETVAL = coro->usecount; break;
1017
1018	yieldstack = *hv_fetch (
1019	(HV *)SvRV (GvSV (coro_current)),
1020	"yieldstack", sizeof ("yieldstack") - 1,
1021	0	1817	}
1022	);	1818	OUTPUT:
		1819	RETVAL
1023		1820
1024	/* set up @_ -- ugly */	1821	void
1025	av_clear (defav);	1822	force_cctx ()
1026	av_fill (defav, items - 1);	1823	CODE:
1027	while (items--)	1824	struct coro *coro = SvSTATE (coro_current);
1028	av_store (defav, items, SvREFCNT_inc (ST(items)));	1825	coro->cctx->idle_sp = 0;
1029
1030	sv = av_pop ((AV *)SvRV (yieldstack));
1031	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1032	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1033	SvREFCNT_dec (sv);
1034
1035	transfer (aTHX_ prev, next, 0);
1036		1826
1037	MODULE = Coro::State PACKAGE = Coro	1827	MODULE = Coro::State PACKAGE = Coro
1038		1828
1039	BOOT:	1829	BOOT:
1040	{	1830	{
1041	int i;	1831	int i;
		1832
		1833	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1834	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1835	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1836
		1837	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1838	SvREADONLY_on (coro_current);
		1839
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1840	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1841
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1842	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1843	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1844	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1845	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1846	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1847	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053		1848
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1849	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1850	coro_ready[i] = newAV ();
1056		1851
1057	{	1852	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1853	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1854	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1059		1855
1060	coroapi.schedule = api_schedule;	1856	coroapi.schedule = api_schedule;
1061	coroapi.cede = api_cede;	1857	coroapi.cede = api_cede;
		1858	coroapi.cede_notself = api_cede_notself;
1062	coroapi.ready = api_ready;	1859	coroapi.ready = api_ready;
		1860	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1861	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1862	coroapi.current = coro_current;
1065		1863
1066	GCoroAPI = &coroapi;	1864	GCoroAPI = &coroapi;
1067	sv_setiv (sv, (IV)&coroapi);	1865	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on (sv);	1866	SvREADONLY_on (sv);
1069	}	1867	}
1070	}	1868	}
1071		1869
1072	#if !PERL_MICRO
1073
1074	void	1870	void
1075	ready(self)	1871	_set_current (SV *current)
1076	SV * self
1077	PROTOTYPE: $	1872	PROTOTYPE: $
1078	CODE:	1873	CODE:
1079	api_ready (self);	1874	SvREFCNT_dec (SvRV (coro_current));
1080		1875	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1081	#endif
1082		1876
1083	int	1877	int
		1878	prio (Coro::State coro, int newprio = 0)
		1879	ALIAS:
		1880	nice = 1
		1881	CODE:
		1882	{
		1883	RETVAL = coro->prio;
		1884
		1885	if (items > 1)
		1886	{
		1887	if (ix)
		1888	newprio = coro->prio - newprio;
		1889
		1890	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1891	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1892
		1893	coro->prio = newprio;
		1894	}
		1895	}
		1896	OUTPUT:
		1897	RETVAL
		1898
		1899	SV *
		1900	ready (SV *self)
		1901	PROTOTYPE: $
		1902	CODE:
		1903	RETVAL = boolSV (api_ready (self));
		1904	OUTPUT:
		1905	RETVAL
		1906
		1907	int
1084	nready(...)	1908	nready (...)
1085	PROTOTYPE:	1909	PROTOTYPE:
1086	CODE:	1910	CODE:
1087	RETVAL = coro_nready;	1911	RETVAL = coro_nready;
1088	OUTPUT:	1912	OUTPUT:
1089	RETVAL	1913	RETVAL
1090		1914
1091	void	1915	void
1092	schedule(...)	1916	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1917	PROTOTYPE: $;$
		1918	CODE:
		1919	SvREFCNT_dec (self->throw);
		1920	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1921
		1922	void
		1923	swap_defsv (Coro::State self)
1093	PROTOTYPE:	1924	PROTOTYPE: $
		1925	ALIAS:
		1926	swap_defav = 1
		1927	CODE:
		1928	if (!self->slot)
		1929	croak ("cannot swap state with coroutine that has no saved state");
		1930	else
		1931	{
		1932	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1933	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1934
		1935	SV *tmp = *src; *src = *dst; *dst = tmp;
		1936	}
		1937
		1938	# for async_pool speedup
		1939	void
		1940	_pool_1 (SV *cb)
1094	CODE:	1941	CODE:
1095	api_schedule ();	1942	{
		1943	struct coro *coro = SvSTATE (coro_current);
		1944	HV *hv = (HV *)SvRV (coro_current);
		1945	AV *defav = GvAV (PL_defgv);
		1946	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1947	AV *invoke_av;
		1948	int i, len;
		1949
		1950	if (!invoke)
		1951	{
		1952	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1953	croak ("\3async_pool terminate\2\n");
		1954	}
		1955
		1956	SvREFCNT_dec (coro->saved_deffh);
		1957	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1958
		1959	hv_store (hv, "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1961
		1962	invoke_av = (AV *)SvRV (invoke);
		1963	len = av_len (invoke_av);
		1964
		1965	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1966
		1967	if (len > 0)
		1968	{
		1969	av_fill (defav, len - 1);
		1970	for (i = 0; i < len; ++i)
		1971	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1972	}
		1973
		1974	SvREFCNT_dec (invoke);
		1975	}
1096		1976
1097	void	1977	void
1098	cede(...)	1978	_pool_2 (SV *cb)
1099	PROTOTYPE:
1100	CODE:	1979	CODE:
1101	api_cede ();	1980	{
		1981	struct coro *coro = SvSTATE (coro_current);
1102		1982
1103	# and these are hacks	1983	sv_setsv (cb, &PL_sv_undef);
		1984
		1985	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1986	coro->saved_deffh = 0;
		1987
		1988	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1989	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1990	{
		1991	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1992	croak ("\3async_pool terminate\2\n");
		1993	}
		1994
		1995	av_clear (GvAV (PL_defgv));
		1996	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1997	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1998
		1999	coro->prio = 0;
		2000
		2001	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2002	api_trace (coro_current, 0);
		2003
		2004	av_push (av_async_pool, newSVsv (coro_current));
		2005	}
		2006
		2007
		2008	MODULE = Coro::State PACKAGE = Coro::AIO
		2009
1104	SV *	2010	SV *
1105	_aio_get_state ()	2011	_get_state ()
1106	CODE:	2012	CODE:
1107	{	2013	{
1108	struct {	2014	struct io_state *data;
1109	int errorno;
1110	int laststype;
1111	int laststatval;
1112	Stat_t statcache;
1113	} data;
1114		2015
		2016	RETVAL = newSV (sizeof (struct io_state));
		2017	data = (struct io_state *)SvPVX (RETVAL);
		2018	SvCUR_set (RETVAL, sizeof (struct io_state));
		2019	SvPOK_only (RETVAL);
		2020
1115	data.errorno = errno;	2021	data->errorno = errno;
1116	data.laststype = PL_laststype;	2022	data->laststype = PL_laststype;
1117	data.laststatval = PL_laststatval;	2023	data->laststatval = PL_laststatval;
1118	data.statcache = PL_statcache;	2024	data->statcache = PL_statcache;
1119
1120	RETVAL = newSVpvn ((char *)&data, sizeof data);
1121	}	2025	}
1122	OUTPUT:	2026	OUTPUT:
1123	RETVAL	2027	RETVAL
1124		2028
1125	void	2029	void
1126	_aio_set_state (char *data_)	2030	_set_state (char *data_)
1127	PROTOTYPE: $	2031	PROTOTYPE: $
1128	CODE:	2032	CODE:
1129	{	2033	{
1130	struct {	2034	struct io_state *data = (void *)data_;
1131	int errorno;
1132	int laststype;
1133	int laststatval;
1134	Stat_t statcache;
1135	} *data = (void *)data_;
1136		2035
1137	errno = data->errorno;	2036	errno = data->errorno;
1138	PL_laststype = data->laststype;	2037	PL_laststype = data->laststype;
1139	PL_laststatval = data->laststatval;	2038	PL_laststatval = data->laststatval;
1140	PL_statcache = data->statcache;	2039	PL_statcache = data->statcache;
1141	}	2040	}
		2041

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