[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.227 by root, Sat Apr 5 22:29:54 2008 UTC

…		…
1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
		16
		17	#ifdef HAVE_MMAP
		18	# include <unistd.h>
		19	# include <sys/mman.h>
		20	# ifndef MAP_ANONYMOUS
		21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
		23	# else
		24	# undef HAVE_MMAP
		25	# endif
		26	# endif
		27	# include <limits.h>
		28	# ifndef PAGESIZE
		29	# define PAGESIZE pagesize
		30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		31	static long pagesize;
		32	# else
		33	# define BOOT_PAGESIZE (void)0
		34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
		39
		40	#if CORO_USE_VALGRIND
		41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	\|\| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
10	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
12	# endif	59	# endif
13	# ifndef call_sv	60	# ifndef call_sv
14	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
25	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
27	# endif	74	# endif
28	#endif	75	#endif
29		76
30	#include <stdio.h>	77	/* 5.8.8 */
31	#include <errno.h>	78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
		90	/* 5.8.7 */
		91	#ifndef SvRV_set
		92	# define SvRV_set(s,v) SvRV(s) = (v)
		93	#endif
32		94
33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34	# undef STACKGUARD	96	# undef CORO_STACKGUARD
35	#endif
36
37	#ifndef STACKGUARD
38	# define STACKGUARD 0
39	#endif
40
41	#ifdef HAVE_MMAP
42	# include <unistd.h>
43	# include <sys/mman.h>
44	# ifndef MAP_ANONYMOUS
45	# ifdef MAP_ANON
46	# define MAP_ANONYMOUS MAP_ANON
47	# else
48	# undef HAVE_MMAP
49	# endif
50	# endif	97	#endif
51	# include <limits.h>	98
52	# ifndef PAGESIZE	99	#ifndef CORO_STACKGUARD
53	# define PAGESIZE pagesize	100	# define CORO_STACKGUARD 0
54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55	static long pagesize;
56	# else
57	# define BOOT_PAGESIZE
58	# endif	101	#endif
59	#endif
60		102
61	/* The next macro should declare a variable stacklevel that contains and approximation	103	/* prefer perl internal functions over our own? */
62	* to the current C stack pointer. Its property is that it changes with each call	104	#ifndef CORO_PREFER_PERL_FUNCTIONS
63	* and should be unique. */	105	# define CORO_PREFER_PERL_FUNCTIONS 0
		106	#endif
		107
		108	/* The next macros try to return the current stack pointer, in an as
		109	* portable way as possible. */
64	#define dSTACKLEVEL int stacklevel	110	#define dSTACKLEVEL volatile char stacklevel
65	#define STACKLEVEL ((void *)&stacklevel)	111	#define STACKLEVEL ((void *)&stacklevel)
66		112
67	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
68		114
		115	#if __GNUC__ >= 3
		116	# define attribute(x) __attribute__(x)
		117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
		119	#else
		120	# define attribute(x)
		121	# define BARRIER
		122	# define expect(expr,value) (expr)
		123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
		127
		128	#define NOINLINE attribute ((noinline))
		129
69	#include "CoroAPI.h"	130	#include "CoroAPI.h"
70
71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72		131
73	#ifdef USE_ITHREADS	132	#ifdef USE_ITHREADS
74	static perl_mutex coro_mutex;	133	static perl_mutex coro_mutex;
75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	134	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	135	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77	#else	136	#else
78	# define LOCK (void)0	137	# define LOCK (void)0
79	# define UNLOCK (void)0	138	# define UNLOCK (void)0
80	#endif	139	#endif
81		140
		141	/* helper storage struct for Coro::AIO */
		142	struct io_state
		143	{
		144	int errorno;
		145	I32 laststype;
		146	int laststatval;
		147	Stat_t statcache;
		148	};
		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
82	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
83	static AV main_mainstack; / used to differentiate between $main and others */	152	static AV main_mainstack; / used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
84	static HV coro_state_stash, coro_stash;	154	static HV coro_state_stash, coro_stash;
85	static SV coro_mortal; / will be freed after next transfer */	155	static volatile SV coro_mortal; / will be freed after next transfer */
		156
		157	static GV irsgv; / $/ */
		158	static GV stdoutgv; / STDOUT /
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV hv_sig; / %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
		167
		168	static struct coro_cctx *cctx_first;
		169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		178	};
86		179
87	/* this is a structure representing a c-level coroutine */	180	/* this is a structure representing a c-level coroutine */
88	typedef struct coro_stack {	181	typedef struct coro_cctx {
89	struct coro_stack *next;	182	struct coro_cctx *next;
90		183
91	/* the stack */	184	/* the stack */
92	void *sptr;	185	void *sptr;
93	long ssize; /* positive == mmap, otherwise malloc */	186	size_t ssize;
94		187
95	/* cpu state */	188	/* cpu state */
96	void idle_sp; / sp of top-level transfer/schedule/cede call */	189	void idle_sp; / sp of top-level transfer/schedule/cede call */
		190	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
97	JMPENV *top_env;	191	JMPENV *top_env;
98	coro_context cctx;	192	coro_context cctx;
99	} coro_stack;	193
		194	#if CORO_USE_VALGRIND
		195	int valgrind_id;
		196	#endif
		197	unsigned char flags;
		198	} coro_cctx;
		199
		200	enum {
		201	CF_RUNNING = 0x0001, /* coroutine is running */
		202	CF_READY = 0x0002, /* coroutine is ready */
		203	CF_NEW = 0x0004, /* has never been switched to */
		204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		205	};
		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		208	typedef struct {
		209	SV *defsv;
		210	AV *defav;
		211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
		217
		218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
100		219
101	/* this is a structure representing a perl-level coroutine */	220	/* this is a structure representing a perl-level coroutine */
102	struct coro {	221	struct coro {
103	/* the c coroutine allocated to this perl coroutine, if any */	222	/* the c coroutine allocated to this perl coroutine, if any */
104	coro_stack *stack;	223	coro_cctx *cctx;
105		224
106	/* data associated with this coroutine (initial args) */	225	/* process data */
107	AV *args;
108	int refcnt;
109
110	/* optionally saved, might be zero */
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;	226	AV *mainstack;
123	SV **stack_sp;	227	perl_slots slot; / basically the saved sp */
124	OP *op;	228
125	SV **curpad;	229	AV args; / data associated with this coroutine (initial args) */
126	AV *comppad;	230	int refcnt; /* coroutines are refcounted, yes */
127	CV *compcv;	231	int flags; /* CF_ flags */
128	SV **stack_base;	232	HV hv; / the perl hash associated with this coro, if any */
129	SV **stack_max;	233
130	SV **tmps_stack;	234	/* statistics */
131	I32 tmps_floor;	235	int usecount; /* number of transfers to this coro */
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		236
149	/* coro process data */	237	/* coro process data */
150	int prio;	238	int prio;
		239	SV throw; / exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
		243
		244	/* linked list */
		245	struct coro next, prev;
151	};	246	};
152		247
153	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
154	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
155		250
		251	/ Coro ******************************************************************/
		252
		253	#define PRIO_MAX 3
		254	#define PRIO_HIGH 1
		255	#define PRIO_NORMAL 0
		256	#define PRIO_LOW -1
		257	#define PRIO_IDLE -3
		258	#define PRIO_MIN -4
		259
		260	/* for Coro.pm */
		261	static SV *coro_current;
		262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		263	static int coro_nready;
		264	static struct coro *coro_first;
		265
		266	/ lowlevel stuff ********************************************************/
		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,9,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
156	static AV *	278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,9,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,9,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
		298	static AV *
157	coro_clone_padlist (CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
158	{	300	{
159	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
160	AV newpadlist, newpad;	302	AV newpadlist, newpad;
161		303
162	newpadlist = newAV ();	304	newpadlist = newAV ();
163	AvREAL_off (newpadlist);	305	AvREAL_off (newpadlist);
164	#if PERL_VERSION < 9	306	#if PERL_VERSION_ATLEAST (5,9,0)
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		308	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168	#endif	310	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	312	--AvFILLp (padlist);
171		313
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	314	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
174		316
175	return newpadlist;	317	return newpadlist;
176	}	318	}
177		319
178	static void	320	static void
179	free_padlist (AV *padlist)	321	free_padlist (pTHX_ AV *padlist)
180	{	322	{
181	/* may be during global destruction */	323	/* may be during global destruction */
182	if (SvREFCNT (padlist))	324	if (SvREFCNT (padlist))
183	{	325	{
184	I32 i = AvFILLp (padlist);	326	I32 i = AvFILLp (padlist);
…		…
205	AV *padlist;	347	AV *padlist;
206	AV av = (AV )mg->mg_obj;	348	AV av = (AV )mg->mg_obj;
207		349
208	/* casting is fun. */	350	/* casting is fun. */
209	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	351	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
210	free_padlist (padlist);	352	free_padlist (aTHX_ padlist);
211
212	SvREFCNT_dec (av);
213		353
214	return 0;	354	return 0;
215	}	355	}
216		356
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
218		359
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
		364
		365	#define CORO_MAGIC(sv,type) \
		366	SvMAGIC (sv) \
		367	? SvMAGIC (sv)->mg_type == type \
		368	? SvMAGIC (sv) \
		369	: mg_find (sv, type) \
		370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
220		400
221	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
222	static void	402	static void
223	get_padlist (CV *cv)	403	get_padlist (pTHX_ CV *cv)
224	{	404	{
225	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
		406	AV *av;
226		407
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	410	else
230	{	411	{
231	#if 0	412	#if CORO_PREFER_PERL_FUNCTIONS
232	/* this is probably cleaner, but also slower? */	413	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (cv);	414	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	415	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	416	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	417	SvREFCNT_dec (cp);
237	#else	418	#else
238	CvPADLIST (cv) = coro_clone_padlist (cv);	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
239	#endif	420	#endif
240	}	421	}
241	}	422	}
242		423
243	static void	424	static void
244	put_padlist (CV *cv)	425	put_padlist (pTHX_ CV *cv)
245	{	426	{
246	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
		428	AV *av;
247		429
248	if (!mg)	430	if (expect_false (!mg))
249	{	431	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();
254	}
255		432
256	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	433	av = (AV *)mg->mg_obj;
257	}
258		434
259	#define SB do {	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
260	#define SE } while (0)	436	av_extend (av, AvMAX (av) + 1);
261		437
262	#define LOAD(state) load_state((state));	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263	#define SAVE(state,flags) save_state((state),(flags));	439	}
264		440
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	441	/ load & save, init *****************************************************/
266		442
267	static void	443	static void
268	load_state(Coro__State c)	444	load_perl (pTHX_ Coro__State c)
269	{	445	{
270	PL_dowarn = c->dowarn;	446	perl_slots *slot = c->slot;
271	PL_in_eval = c->in_eval;	447	c->slot = 0;
272		448
273	PL_curstackinfo = c->curstackinfo;
274	PL_curstack = c->curstack;
275	PL_mainstack = c->mainstack;	449	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		450
304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	451	GvSV (PL_defgv) = slot->defsv;
305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	452	GvAV (PL_defgv) = slot->defav;
306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
		456	#define VAR(name,type) PL_ ## name = slot->name;
		457	# include "state.h"
		458	#undef VAR
307		459
308	{	460	{
309	dSP;	461	dSP;
		462
310	CV *cv;	463	CV *cv;
311		464
312	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
314	{	467	{
315	AV padlist = (AV )POPs;
316
317	if (padlist)
318	{
319	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
320	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
321	}	470	CvPADLIST (cv) = (AV *)POPs;
322
323	++CvDEPTH(cv);
324	}	471	}
325		472
326	PUTBACK;	473	PUTBACK;
327	}	474	}
328	}	475	}
329		476
330	static void	477	static void
331	save_state(Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
332	{	479	{
333	{	480	{
334	dSP;	481	dSP;
335	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
336	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
339	/*	486	/*
340	* 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
341	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
342	*/	489	*/
343		490
344	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
345	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
346	for (;;)	493	for (;;)
347	{	494	{
348	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
349	{	496	{
350	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
351		498
352	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
353	{	500	{
354	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
355	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
356	{	504	{
357	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
358
359	while (--CvDEPTH(cv))
360	{
361	/* this tells the restore code to increment CvDEPTH */
362	PUSHs (Nullsv);
363	PUSHs ((SV *)cv);
364	}
365
366	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
368		509
		510	CvDEPTH (cv) = 0;
369	get_padlist (cv);	511	get_padlist (aTHX_ cv);
370	}	512	}
371	}	513	}
372	#ifdef CXt_FORMAT
373	else if (CxTYPE(cx) == CXt_FORMAT)
374	{
375	/* I never used formats, so how should I know how these are implemented? */
376	/* my bold guess is as a simple, plain sub... */
377	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378	}
379	#endif
380	}	514	}
381		515
382	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
383	break;	517	break;
384		518
385	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
386	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
387	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
388	}	522	}
389		523
390	PUTBACK;	524	PUTBACK;
391	}	525	}
392		526
393	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
394	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
395	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 */
396		538
397	c->dowarn = PL_dowarn;
398	c->in_eval = PL_in_eval;
399
400	c->curstackinfo = PL_curstackinfo;
401	c->curstack = PL_curstack;
402	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
403	c->stack_sp = PL_stack_sp;	540
404	c->op = PL_op;	541	{
405	c->curpad = PL_curpad;	542	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
406	c->comppad = PL_comppad;	543
407	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
408	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
409	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
410	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
411	c->tmps_floor = PL_tmps_floor;	548
412	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
413	c->tmps_max = PL_tmps_max;	550	# include "state.h"
414	c->markstack = PL_markstack;	551	#undef VAR
415	c->markstack_ptr = PL_markstack_ptr;	552	}
416	c->markstack_max = PL_markstack_max;
417	c->scopestack = PL_scopestack;
418	c->scopestack_ix = PL_scopestack_ix;
419	c->scopestack_max = PL_scopestack_max;
420	c->savestack = PL_savestack;
421	c->savestack_ix = PL_savestack_ix;
422	c->savestack_max = PL_savestack_max;
423	#if PERL_VERSION < 9
424	c->retstack = PL_retstack;
425	c->retstack_ix = PL_retstack_ix;
426	c->retstack_max = PL_retstack_max;
427	#endif
428	c->curpm = PL_curpm;
429	c->curcop = PL_curcop;
430	}	553	}
431		554
432	/*	555	/*
433	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
434	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
435	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
436	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
437	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
438	static void	564	static void
439	coro_init_stacks ()	565	coro_init_stacks (pTHX)
440	{	566	{
441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	567	PL_curstackinfo = new_stackinfo(32, 8);
442	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
443	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445		571
446	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
447	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
448	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449		575
450	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
451	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
452	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
453	PL_tmps_max = 96;	579	PL_tmps_max = 32;
454		580
455	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
456	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
457	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
458		584
459	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
460	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
461	#endif	587	#endif
462		588
463	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
464	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
465	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
466		592
467	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
468	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
469	PL_savestack_max = 96;	595	PL_savestack_max = 24;
470		596
471	#if PERL_VERSION < 9	597	#if !PERL_VERSION_ATLEAST (5,9,0)
472	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
473	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
474	PL_retstack_max = 8;	600	PL_retstack_max = 4;
475	#endif	601	#endif
476	}	602	}
		603	#endif
477		604
478	/*	605	/*
479	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
480	*/	607	*/
481	static void	608	static void
482	destroy_stacks()	609	coro_destroy_stacks (pTHX)
483	{	610	{
484	if (!IN_DESTRUCT)
485	{
486	/* is this ugly, I ask? */
487	LEAVE_SCOPE (0);
488
489	/* sure it is, but more important: is it correct?? :/ */
490	FREETMPS;
491
492	/POPSTACK_TO (PL_mainstack);//D//use/
493	}
494
495	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
496	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
497		613
498	while (PL_curstackinfo)	614	while (PL_curstackinfo)
499	{	615	{
500	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
501		617
502	{ /D//remove/
503	dSP;
504	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505	PUTBACK; /* possibly superfluous */
506	}
507
508	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
509	{
510	dounwind (-1);/D//remove/
511	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
512	}
513		620
514	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
515	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
516	PL_curstackinfo = p;	623	PL_curstackinfo = p;
517	}	624	}
518		625
519	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
520	Safefree (PL_markstack);	627	Safefree (PL_markstack);
521	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
522	Safefree (PL_savestack);	629	Safefree (PL_savestack);
523	#if PERL_VERSION < 9	630	#if !PERL_VERSION_ATLEAST (5,9,0)
524	Safefree (PL_retstack);	631	Safefree (PL_retstack);
525	#endif	632	#endif
526	}	633	}
527		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		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);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/ coroutine stack handling **********************************************/
		673
		674	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
		675	static int (orig_sigelem_set) (pTHX_ SV sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV old = svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
		723
528	static void	724	static void
529	setup_coro (struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
530	{	726	{
531	/*	727	/*
532	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
533	*/	729	*/
534	dTHX;	730	coro_init_stacks (aTHX);
		731
		732	PL_runops = RUNOPS_DEFAULT;
		733	PL_curcop = &PL_compiling;
		734	PL_in_eval = EVAL_NULL;
		735	PL_comppad = 0;
		736	PL_curpm = 0;
		737	PL_curpad = 0;
		738	PL_localizing = 0;
		739	PL_dirty = 0;
		740	PL_restartop = 0;
		741
		742	/* recreate the die/warn hooks */
		743	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		744	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		745
		746	GvSV (PL_defgv) = newSV (0);
		747	GvAV (PL_defgv) = coro->args; coro->args = 0;
		748	GvSV (PL_errgv) = newSV (0);
		749	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		750	PL_rs = newSVsv (GvSV (irsgv));
		751	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		752
		753	{
		754	dSP;
		755	LOGOP myop;
		756
		757	Zero (&myop, 1, LOGOP);
		758	myop.op_next = Nullop;
		759	myop.op_flags = OPf_WANT_VOID;
		760
		761	PUSHMARK (SP);
		762	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		763	PUTBACK;
		764	PL_op = (OP *)&myop;
		765	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		766	SPAGAIN;
		767	}
		768
		769	/* this newly created coroutine might be run on an existing cctx which most
		770	* likely was suspended in set_stacklevel, called from entersub.
		771	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		772	* so we ENTER here for symmetry
		773	*/
		774	ENTER;
		775	}
		776
		777	static void
		778	coro_destroy (pTHX_ struct coro *coro)
		779	{
		780	if (!IN_DESTRUCT)
		781	{
		782	/* restore all saved variables and stuff */
		783	LEAVE_SCOPE (0);
		784	assert (PL_tmps_floor == -1);
		785
		786	/* free all temporaries */
		787	FREETMPS;
		788	assert (PL_tmps_ix == -1);
		789
		790	/* unwind all extra stacks */
		791	POPSTACK_TO (PL_mainstack);
		792
		793	/* unwind main stack */
		794	dounwind (-1);
		795	}
		796
		797	SvREFCNT_dec (GvSV (PL_defgv));
		798	SvREFCNT_dec (GvAV (PL_defgv));
		799	SvREFCNT_dec (GvSV (PL_errgv));
		800	SvREFCNT_dec (PL_defoutgv);
		801	SvREFCNT_dec (PL_rs);
		802	SvREFCNT_dec (GvSV (irsgv));
		803
		804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
		809
		810	coro_destroy_stacks (aTHX);
		811	}
		812
		813	static void
		814	free_coro_mortal (pTHX)
		815	{
		816	if (expect_true (coro_mortal))
		817	{
		818	SvREFCNT_dec (coro_mortal);
		819	coro_mortal = 0;
		820	}
		821	}
		822
		823	static int
		824	runops_trace (pTHX)
		825	{
		826	COP *oldcop = 0;
		827	int oldcxix = -2;
		828	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		829	coro_cctx *cctx = coro->cctx;
		830
		831	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		832	{
		833	PERL_ASYNC_CHECK ();
		834
		835	if (cctx->flags & CC_TRACE_ALL)
		836	{
		837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		838	{
		839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		840	SV bot, top;
		841	AV av = newAV (); / return values */
		842	SV **cb;
		843	dSP;
		844
		845	GV *gv = CvGV (cx->blk_sub.cv);
		846	SV *fullname = sv_2mortal (newSV (0));
		847	if (isGV (gv))
		848	gv_efullname3 (fullname, gv, 0);
		849
		850	bot = PL_stack_base + cx->blk_oldsp + 1;
		851	top = cx->blk_gimme == G_ARRAY ? SP + 1
		852	: cx->blk_gimme == G_SCALAR ? bot + 1
		853	: bot;
		854
		855	av_extend (av, top - bot);
		856	while (bot < top)
		857	av_push (av, SvREFCNT_inc (*bot++));
		858
		859	PL_runops = RUNOPS_DEFAULT;
		860	ENTER;
		861	SAVETMPS;
		862	EXTEND (SP, 3);
		863	PUSHMARK (SP);
		864	PUSHs (&PL_sv_no);
		865	PUSHs (fullname);
		866	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		867	PUTBACK;
		868	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		869	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		870	SPAGAIN;
		871	FREETMPS;
		872	LEAVE;
		873	PL_runops = runops_trace;
		874	}
		875
		876	if (oldcop != PL_curcop)
		877	{
		878	oldcop = PL_curcop;
		879
		880	if (PL_curcop != &PL_compiling)
		881	{
		882	SV **cb;
		883
		884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		885	{
		886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		887
		888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		889	{
		890	runops_proc_t old_runops = PL_runops;
		891	dSP;
		892	GV *gv = CvGV (cx->blk_sub.cv);
		893	SV *fullname = sv_2mortal (newSV (0));
		894
		895	if (isGV (gv))
		896	gv_efullname3 (fullname, gv, 0);
		897
		898	PL_runops = RUNOPS_DEFAULT;
		899	ENTER;
		900	SAVETMPS;
		901	EXTEND (SP, 3);
		902	PUSHMARK (SP);
		903	PUSHs (&PL_sv_yes);
		904	PUSHs (fullname);
		905	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		906	PUTBACK;
		907	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		908	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		909	SPAGAIN;
		910	FREETMPS;
		911	LEAVE;
		912	PL_runops = runops_trace;
		913	}
		914
		915	oldcxix = cxstack_ix;
		916	}
		917
		918	if (cctx->flags & CC_TRACE_LINE)
		919	{
		920	dSP;
		921
		922	PL_runops = RUNOPS_DEFAULT;
		923	ENTER;
		924	SAVETMPS;
		925	EXTEND (SP, 3);
		926	PL_runops = RUNOPS_DEFAULT;
		927	PUSHMARK (SP);
		928	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		929	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		930	PUTBACK;
		931	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		932	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		933	SPAGAIN;
		934	FREETMPS;
		935	LEAVE;
		936	PL_runops = runops_trace;
		937	}
		938	}
		939	}
		940	}
		941	}
		942
		943	TAINT_NOT;
		944	return 0;
		945	}
		946
		947	/* inject a fake call to Coro::State::_cctx_init into the execution */
		948	/* _cctx_init should be careful, as it could be called at almost any time */
		949	/* during execution of a perl program */
		950	static void NOINLINE
		951	cctx_prepare (pTHX_ coro_cctx *cctx)
		952	{
535	dSP;	953	dSP;
536	UNOP myop;	954	LOGOP myop;
537	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
538		955
539	coro_init_stacks ();	956	PL_top_env = &PL_start_env;
540	/PL_curcop = 0;/
541	/PL_in_eval = PL_in_eval;/ /* inherit */
542	SvREFCNT_dec (GvAV (PL_defgv));
543	GvAV (PL_defgv) = coro->args; coro->args = 0;
544		957
545	SPAGAIN;	958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
546		960
547	Zero (&myop, 1, UNOP);	961	Zero (&myop, 1, LOGOP);
548	myop.op_next = Nullop;	962	myop.op_next = PL_op;
549	myop.op_flags = OPf_WANT_VOID;	963	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
550		964
		965	PUSHMARK (SP);
		966	EXTEND (SP, 2);
		967	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		968	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		969	PUTBACK;
551	PL_op = (OP *)&myop;	970	PL_op = (OP *)&myop;
552
553	PUSHMARK(SP);
554	XPUSHs (sub_init);
555	PUTBACK;
556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	971	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557	SPAGAIN;	972	SPAGAIN;
558
559	ENTER; /* necessary e.g. for dounwind */
560	}	973	}
561		974
		975	/*
		976	* this is a _very_ stripped down perl interpreter ;)
		977	*/
562	static void	978	static void
563	free_coro_mortal ()	979	cctx_run (void *arg)
564	{	980	{
565	if (coro_mortal)	981	dTHX;
566	{	982
567	SvREFCNT_dec (coro_mortal);	983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
568	coro_mortal = 0;	984	UNLOCK;
		985
		986	/* we now skip the entersub that lead to transfer() */
		987	PL_op = PL_op->op_next;
		988
		989	/* inject a fake subroutine call to cctx_init */
		990	cctx_prepare (aTHX_ (coro_cctx *)arg);
		991
		992	/* somebody or something will hit me for both perl_run and PL_restartop */
		993	PL_restartop = PL_op;
		994	perl_run (PL_curinterp);
		995
		996	/*
		997	* If perl-run returns we assume exit() was being called or the coro
		998	* fell off the end, which seems to be the only valid (non-bug)
		999	* reason for perl_run to return. We try to exit by jumping to the
		1000	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1001	* coroutine as Coro has no such concept
		1002	*/
		1003	PL_top_env = main_top_env;
		1004	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1005	}
		1006
		1007	static coro_cctx *
		1008	cctx_new ()
		1009	{
		1010	coro_cctx *cctx;
		1011	void *stack_start;
		1012	size_t stack_size;
		1013
		1014	++cctx_count;
		1015
		1016	Newz (0, cctx, 1, coro_cctx);
		1017
		1018	#if HAVE_MMAP
		1019	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1020	/* mmap supposedly does allocate-on-write for us */
		1021	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		1022
		1023	if (cctx->sptr != (void *)-1)
569	}	1024	{
		1025	# if CORO_STACKGUARD
		1026	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1027	# endif
		1028	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1029	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1030	cctx->flags \|= CC_MAPPED;
		1031	}
		1032	else
		1033	#endif
		1034	{
		1035	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1036	New (0, cctx->sptr, coro_stacksize, long);
		1037
		1038	if (!cctx->sptr)
		1039	{
		1040	perror ("FATAL: unable to allocate stack for coroutine");
		1041	_exit (EXIT_FAILURE);
		1042	}
		1043
		1044	stack_start = cctx->sptr;
		1045	stack_size = cctx->ssize;
		1046	}
		1047
		1048	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		1049	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1050
		1051	return cctx;
570	}	1052	}
571		1053
572	static void	1054	static void
573	prepare_cctx (coro_stack *cctx)	1055	cctx_destroy (coro_cctx *cctx)
574	{	1056	{
575	dSP;	1057	if (!cctx)
576	UNOP myop;	1058	return;
577		1059
578	Zero (&myop, 1, UNOP);	1060	--cctx_count;
579	myop.op_next = PL_op;
580	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
581		1061
582	PUSHMARK(SP);	1062	#if CORO_USE_VALGRIND
583	EXTEND (SP, 2);	1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
584	PUSHs (newSViv (PTR2IV (cctx)));	1064	#endif
585	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	1065
586	PUTBACK;	1066	#if HAVE_MMAP
587	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	1067	if (cctx->flags & CC_MAPPED)
588	SPAGAIN;	1068	munmap (cctx->sptr, cctx->ssize);
		1069	else
		1070	#endif
		1071	Safefree (cctx->sptr);
		1072
		1073	Safefree (cctx);
		1074	}
		1075
		1076	/* wether this cctx should be destructed */
		1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1078
		1079	static coro_cctx *
		1080	cctx_get (pTHX)
		1081	{
		1082	while (expect_true (cctx_first))
		1083	{
		1084	coro_cctx *cctx = cctx_first;
		1085	cctx_first = cctx->next;
		1086	--cctx_idle;
		1087
		1088	if (expect_true (!CCTX_EXPIRED (cctx)))
		1089	return cctx;
		1090
		1091	cctx_destroy (cctx);
		1092	}
		1093
		1094	return cctx_new ();
589	}	1095	}
590		1096
591	static void	1097	static void
592	coro_run (void *arg)	1098	cctx_put (coro_cctx *cctx)
593	{	1099	{
594	/*	1100	/* free another cctx if overlimit */
595	* this is a _very_ stripped down perl interpreter ;)	1101	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
596	*/
597	UNLOCK;
598
599	PL_top_env = &PL_start_env;
600	prepare_cctx ((coro_stack *)arg);
601
602	/* somebody will hit me for both perl_run and PL_restartop */
603	perl_run (PERL_GET_CONTEXT);
604
605	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
606	abort ();
607	}
608
609	static coro_stack *
610	stack_new ()
611	{
612	coro_stack *stack;
613
614	New (0, stack, 1, coro_stack);
615
616	#if HAVE_MMAP
617
618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
619	/* mmap suppsedly does allocate-on-write for us */
620	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
621
622	if (stack->sptr == (void *)-1)
623	{
624	perror ("FATAL: unable to mmap stack for coroutine");
625	_exit (EXIT_FAILURE);
626	}	1102	{
		1103	coro_cctx *first = cctx_first;
		1104	cctx_first = first->next;
		1105	--cctx_idle;
627		1106
628	# if STACKGUARD	1107	cctx_destroy (first);
629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1108	}
630	# endif
631		1109
		1110	++cctx_idle;
		1111	cctx->next = cctx_first;
		1112	cctx_first = cctx;
		1113	}
		1114
		1115	/ coroutine switching ***************************************************/
		1116
		1117	static void
		1118	transfer_check (pTHX_ struct coro prev, struct coro next)
		1119	{
		1120	if (expect_true (prev != next))
		1121	{
		1122	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1123	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1124
		1125	if (expect_false (next->flags & CF_RUNNING))
		1126	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1127
		1128	if (expect_false (next->flags & CF_DESTROYED))
		1129	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (
		1132	#if PERL_VERSION_ATLEAST (5,9,0)
		1133	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
632	#else	1134	#else
633		1135	expect_false (PL_lex_state != LEX_NOTPARSING)
634	stack->ssize = STACKSIZE * (long)sizeof (long);
635	New (0, stack->sptr, STACKSIZE, long);
636
637	if (!stack->sptr)
638	{
639	perror (stderr, "FATAL: unable to malloc stack for coroutine");
640	_exit (EXIT_FAILURE);
641	}
642
643	#endif	1136	#endif
644		1137	)
645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	1138	croak ("Coro::State::transfer called while parsing, but this is not supported");
646
647	return stack;
648	}
649
650	static void
651	stack_free (coro_stack *stack)
652	{
653	if (!stack)
654	return;
655
656	#if HAVE_MMAP
657	munmap (stack->sptr, stack->ssize);
658	#else
659	Safefree (stack->sptr);
660	#endif
661
662	Safefree (stack);
663	}
664
665	static coro_stack *stack_first;
666
667	static coro_stack *
668	stack_get ()
669	{
670	coro_stack *stack;
671
672	if (stack_first)
673	{
674	stack = stack_first;
675	stack_first = stack->next;
676	}
677	else
678	{
679	stack = stack_new ();
680	PL_op = PL_op->op_next;
681	}	1139	}
682
683	return stack;
684	}	1140	}
685		1141
686	static void	1142	/* always use the TRANSFER macro */
687	stack_put (coro_stack *stack)	1143	static void NOINLINE
688	{
689	stack->next = stack_first;
690	stack_first = stack;
691	}
692
693	/* never call directly, always through the coro_state_transfer global variable */
694	static void
695	transfer_impl (struct coro prev, struct coro next, int flags)	1144	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
696	{	1145	{
697	dSTACKLEVEL;	1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
698		1148
699	/* sometimes transfer is only called to set idle_sp */	1149	/* sometimes transfer is only called to set idle_sp */
700	if (flags == TRANSFER_SET_STACKLEVEL)	1150	if (expect_false (!next))
		1151	{
701	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
702	else if (prev != next)	1153	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
703	{	1154	}
		1155	else if (expect_true (prev != next))
		1156	{
704	coro_stack *prev__stack;	1157	coro_cctx *prev__cctx;
		1158
		1159	if (expect_false (prev->flags & CF_NEW))
		1160	{
		1161	/* create a new empty context */
		1162	Newz (0, prev->cctx, 1, coro_cctx);
		1163	prev->flags &= ~CF_NEW;
		1164	prev->flags \|= CF_RUNNING;
		1165	}
		1166
		1167	prev->flags &= ~CF_RUNNING;
		1168	next->flags \|= CF_RUNNING;
705		1169
706	LOCK;	1170	LOCK;
707		1171
708	if (next->mainstack)	1172	/* first get rid of the old state */
		1173	save_perl (aTHX_ prev);
		1174
		1175	if (expect_false (next->flags & CF_NEW))
709	{	1176	{
710	/* coroutine already started */	1177	/* need to start coroutine */
711	SAVE (prev, flags);	1178	next->flags &= ~CF_NEW;
712	LOAD (next);	1179	/* setup coroutine call */
		1180	coro_setup (aTHX_ next);
713	}	1181	}
714	else	1182	else
		1183	load_perl (aTHX_ next);
		1184
		1185	prev__cctx = prev->cctx;
		1186
		1187	/* possibly "free" the cctx */
		1188	if (expect_true (
		1189	prev__cctx->idle_sp == STACKLEVEL
		1190	&& !(prev__cctx->flags & CC_TRACE)
		1191	&& !force_cctx
		1192	))
715	{	1193	{
716	/* need to start coroutine */	1194	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
717	/* first get rid of the old state */	1195	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
718	SAVE (prev, -1);	1196
719	/* setup coroutine call */	1197	prev->cctx = 0;
720	setup_coro (next);	1198
721	/* need a stack */	1199	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
722	next->stack = 0;	1200	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1201	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1202	if (!next->cctx)
		1203	next->cctx = cctx_get (aTHX);
		1204
		1205	cctx_put (prev__cctx);
723	}	1206	}
724		1207
725	if (!prev->stack)	1208	++next->usecount;
726	/* create a new empty context */
727	Newz (0, prev->stack, 1, coro_stack);
728		1209
729	prev__stack = prev->stack;	1210	if (expect_true (!next->cctx))
		1211	next->cctx = cctx_get (aTHX);
730		1212
731	/* possibly "free" the stack */	1213	has_throw = !!next->throw;
732	if (prev__stack->idle_sp == STACKLEVEL)	1214
		1215	if (expect_false (prev__cctx != next->cctx))
733	{	1216	{
734	stack_put (prev__stack);	1217	prev__cctx->top_env = PL_top_env;
735	prev->stack = 0;	1218	PL_top_env = next->cctx->top_env;
		1219	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
736	}	1220	}
737		1221
738	if (!next->stack)	1222	free_coro_mortal (aTHX);
739	next->stack = stack_get ();	1223	UNLOCK;
740		1224
741	if (prev__stack != next->stack)	1225	if (expect_false (has_throw))
742	{	1226	{
743	prev__stack->top_env = PL_top_env;	1227	struct coro *coro = SvSTATE (coro_current);
744	PL_top_env = next->stack->top_env;	1228
745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1229	if (coro->throw)
		1230	{
		1231	SV *exception = coro->throw;
		1232	coro->throw = 0;
		1233	sv_setsv (ERRSV, exception);
		1234	croak (0);
		1235	}
746	}	1236	}
		1237	}
		1238	}
747		1239
748	free_coro_mortal ();	1240	struct transfer_args
		1241	{
		1242	struct coro prev, next;
		1243	};
749		1244
		1245	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1246	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1247
		1248	/ high level stuff ******************************************************/
		1249
		1250	static int
		1251	coro_state_destroy (pTHX_ struct coro *coro)
		1252	{
		1253	if (coro->flags & CF_DESTROYED)
		1254	return 0;
		1255
		1256	coro->flags \|= CF_DESTROYED;
		1257
		1258	if (coro->flags & CF_READY)
		1259	{
		1260	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1261	/* alternative: look through all ready queues and remove the coro */
		1262	LOCK;
		1263	--coro_nready;
750	UNLOCK;	1264	UNLOCK;
751	}	1265	}
752	}	1266	else
753		1267	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
754	/* use this function pointer to call the above function */
755	/* this is done to increase chances of the compiler not inlining the call */
756	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757	void (coro_state_transfer)(struct coro prev, struct coro *next, int flags) = transfer_impl;
758
759	struct transfer_args
760	{
761	struct coro prev, next;
762	int flags;
763	};
764
765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
766
767	static void
768	coro_state_destroy (struct coro *coro)
769	{
770	if (coro->refcnt--)
771	return;
772		1268
773	if (coro->mainstack && coro->mainstack != main_mainstack)	1269	if (coro->mainstack && coro->mainstack != main_mainstack)
774	{	1270	{
775	struct coro temp;	1271	struct coro temp;
776		1272
777	SAVE ((&temp), TRANSFER_SAVE_ALL);	1273	if (coro->flags & CF_RUNNING)
778	LOAD (coro);	1274	croak ("FATAL: tried to destroy currently running coroutine");
779		1275
780	destroy_stacks ();	1276	save_perl (aTHX_ &temp);
		1277	load_perl (aTHX_ coro);
781		1278
782	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1279	coro_destroy (aTHX_ coro);
783		1280
		1281	load_perl (aTHX_ &temp);
		1282
784	coro->mainstack = 0;	1283	coro->slot = 0;
785	}	1284	}
786		1285
787	stack_free (coro->stack);	1286	cctx_destroy (coro->cctx);
788	SvREFCNT_dec (coro->args);	1287	SvREFCNT_dec (coro->args);
789	Safefree (coro);	1288
		1289	if (coro->next) coro->next->prev = coro->prev;
		1290	if (coro->prev) coro->prev->next = coro->next;
		1291	if (coro == coro_first) coro_first = coro->next;
		1292
		1293	return 1;
790	}	1294	}
791		1295
792	static int	1296	static int
793	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1297	coro_state_free (pTHX_ SV sv, MAGIC mg)
794	{	1298	{
795	struct coro coro = (struct coro )mg->mg_ptr;	1299	struct coro coro = (struct coro )mg->mg_ptr;
796	mg->mg_ptr = 0;	1300	mg->mg_ptr = 0;
797		1301
		1302	coro->hv = 0;
		1303
		1304	if (--coro->refcnt < 0)
		1305	{
798	coro_state_destroy (coro);	1306	coro_state_destroy (aTHX_ coro);
		1307	Safefree (coro);
		1308	}
799		1309
800	return 0;	1310	return 0;
801	}	1311	}
802		1312
803	static int	1313	static int
…		…
808	++coro->refcnt;	1318	++coro->refcnt;
809		1319
810	return 0;	1320	return 0;
811	}	1321	}
812		1322
813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1323	static MGVTBL coro_state_vtbl = {
814		1324	0, 0, 0, 0,
815	static struct coro *	1325	coro_state_free,
816	SvSTATE (SV *coro)	1326	0,
817	{	1327	#ifdef MGf_DUP
818	HV *stash;	1328	coro_state_dup,
819	MAGIC *mg;	1329	#else
820		1330	# define MGf_DUP 0
821	if (SvROK (coro))	1331	#endif
822	coro = SvRV (coro);	1332	};
823
824	stash = SvSTASH (coro);
825	if (stash != coro_stash && stash != coro_state_stash)
826	{
827	/* very slow, but rare, check */
828	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
829	croak ("Coro::State object required");
830	}
831
832	mg = SvMAGIC (coro);
833	assert (mg->mg_type == PERL_MAGIC_ext);
834	return (struct coro *)mg->mg_ptr;
835	}
836		1333
837	static void	1334	static void
838	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1335	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
839	{	1336	{
840	ta->prev = SvSTATE (prev);	1337	ta->prev = SvSTATE (prev_sv);
841	ta->next = SvSTATE (next);	1338	ta->next = SvSTATE (next_sv);
842	ta->flags = flags;	1339	TRANSFER_CHECK (*ta);
843	}	1340	}
844		1341
845	static void	1342	static void
846	api_transfer (SV prev, SV next, int flags)	1343	api_transfer (SV prev_sv, SV next_sv)
847	{	1344	{
848	dTHX;	1345	dTHX;
849	struct transfer_args ta;	1346	struct transfer_args ta;
850		1347
851	prepare_transfer (&ta, prev, next, flags);	1348	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
852	TRANSFER (ta);	1349	TRANSFER (ta, 1);
853	}	1350	}
854		1351
855	/ Coro ******************************************************************/	1352	/ Coro ******************************************************************/
856		1353
857	#define PRIO_MAX 3
858	#define PRIO_HIGH 1
859	#define PRIO_NORMAL 0
860	#define PRIO_LOW -1
861	#define PRIO_IDLE -3
862	#define PRIO_MIN -4
863
864	/* for Coro.pm */
865	static GV coro_current, coro_idle;
866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;
868
869	static void	1354	static void
870	coro_enq (SV *sv)	1355	coro_enq (pTHX_ SV *coro_sv)
		1356	{
		1357	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1358	}
		1359
		1360	static SV *
		1361	coro_deq (pTHX)
871	{	1362	{
872	int prio;	1363	int prio;
873		1364
874	if (SvTYPE (sv) != SVt_PVHV)
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877	prio = SvSTATE (sv)->prio;
878
879	av_push (coro_ready [prio - PRIO_MIN], sv);
880	coro_nready++;
881	}
882
883	static SV *
884	coro_deq (int min_prio)
885	{
886	int prio = PRIO_MAX - PRIO_MIN;
887
888	min_prio -= PRIO_MIN;
889	if (min_prio < 0)
890	min_prio = 0;
891
892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1365	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
893	if (AvFILLp (coro_ready [prio]) >= 0)	1366	if (AvFILLp (coro_ready [prio]) >= 0)
894	{
895	coro_nready--;
896	return av_shift (coro_ready [prio]);	1367	return av_shift (coro_ready [prio]);
897	}
898		1368
899	return 0;	1369	return 0;
900	}	1370	}
901		1371
		1372	static int
		1373	api_ready (SV *coro_sv)
		1374	{
		1375	dTHX;
		1376	struct coro *coro;
		1377
		1378	if (SvROK (coro_sv))
		1379	coro_sv = SvRV (coro_sv);
		1380
		1381	coro = SvSTATE (coro_sv);
		1382
		1383	if (coro->flags & CF_READY)
		1384	return 0;
		1385
		1386	coro->flags \|= CF_READY;
		1387
		1388	LOCK;
		1389	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1390	++coro_nready;
		1391	UNLOCK;
		1392
		1393	return 1;
		1394	}
		1395
		1396	static int
		1397	api_is_ready (SV *coro_sv)
		1398	{
		1399	dTHX;
		1400	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1401	}
		1402
902	static void	1403	static void
903	api_ready (SV *coro)	1404	prepare_schedule (pTHX_ struct transfer_args *ta)
904	{	1405	{
905	dTHX;	1406	SV prev_sv, next_sv;
906		1407
907	if (SvROK (coro))	1408	for (;;)
908	coro = SvRV (coro);	1409	{
		1410	LOCK;
		1411	next_sv = coro_deq (aTHX);
		1412
		1413	/* nothing to schedule: call the idle handler */
		1414	if (expect_false (!next_sv))
		1415	{
		1416	dSP;
		1417	UNLOCK;
		1418
		1419	ENTER;
		1420	SAVETMPS;
		1421
		1422	PUSHMARK (SP);
		1423	PUTBACK;
		1424	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1425	SPAGAIN;
		1426
		1427	FREETMPS;
		1428	LEAVE;
		1429	continue;
		1430	}
		1431
		1432	ta->next = SvSTATE (next_sv);
		1433
		1434	/* cannot transfer to destroyed coros, skip and look for next */
		1435	if (expect_false (ta->next->flags & CF_DESTROYED))
		1436	{
		1437	UNLOCK;
		1438	SvREFCNT_dec (next_sv);
		1439	/* coro_nready is already taken care of by destroy */
		1440	continue;
		1441	}
		1442
		1443	--coro_nready;
		1444	UNLOCK;
		1445	break;
		1446	}
		1447
		1448	/* free this only after the transfer */
		1449	prev_sv = SvRV (coro_current);
		1450	ta->prev = SvSTATE (prev_sv);
		1451	TRANSFER_CHECK (*ta);
		1452	assert (ta->next->flags & CF_READY);
		1453	ta->next->flags &= ~CF_READY;
		1454	SvRV_set (coro_current, next_sv);
909		1455
910	LOCK;	1456	LOCK;
911	coro_enq (SvREFCNT_inc (coro));	1457	free_coro_mortal (aTHX);
		1458	coro_mortal = prev_sv;
912	UNLOCK;	1459	UNLOCK;
913	}	1460	}
914		1461
915	static void	1462	static void
916	prepare_schedule (struct transfer_args *ta)
917	{
918	SV current, prev, *next;
919
920	current = GvSV (coro_current);
921
922	for (;;)
923	{
924	LOCK;
925	next = coro_deq (PRIO_MIN);
926	UNLOCK;
927
928	if (next)
929	break;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	LOCK;
951	free_coro_mortal ();
952	UNLOCK;
953	coro_mortal = prev;
954
955	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;
958	}
959
960	static void
961	prepare_cede (struct transfer_args *ta)	1463	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1464	{
963	LOCK;	1465	api_ready (coro_current);
964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1466	prepare_schedule (aTHX_ ta);
		1467	}
		1468
		1469	static int
		1470	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1471	{
		1472	if (coro_nready)
		1473	{
		1474	SV *prev = SvRV (coro_current);
		1475	prepare_schedule (aTHX_ ta);
		1476	api_ready (prev);
		1477	return 1;
		1478	}
		1479	else
		1480	return 0;
968	}	1481	}
969		1482
970	static void	1483	static void
971	api_schedule (void)	1484	api_schedule (void)
972	{	1485	{
973	dTHX;	1486	dTHX;
974	struct transfer_args ta;	1487	struct transfer_args ta;
975		1488
976	prepare_schedule (&ta);	1489	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1490	TRANSFER (ta, 1);
978	}	1491	}
979		1492
980	static void	1493	static int
981	api_cede (void)	1494	api_cede (void)
982	{	1495	{
983	dTHX;	1496	dTHX;
984	struct transfer_args ta;	1497	struct transfer_args ta;
985		1498
986	prepare_cede (&ta);	1499	prepare_cede (aTHX_ &ta);
		1500
		1501	if (expect_true (ta.prev != ta.next))
		1502	{
987	TRANSFER (ta);	1503	TRANSFER (ta, 1);
		1504	return 1;
		1505	}
		1506	else
		1507	return 0;
988	}	1508	}
989		1509
		1510	static int
		1511	api_cede_notself (void)
		1512	{
		1513	dTHX;
		1514	struct transfer_args ta;
		1515
		1516	if (prepare_cede_notself (aTHX_ &ta))
		1517	{
		1518	TRANSFER (ta, 1);
		1519	return 1;
		1520	}
		1521	else
		1522	return 0;
		1523	}
		1524
		1525	static void
		1526	api_trace (SV *coro_sv, int flags)
		1527	{
		1528	dTHX;
		1529	struct coro *coro = SvSTATE (coro_sv);
		1530
		1531	if (flags & CC_TRACE)
		1532	{
		1533	if (!coro->cctx)
		1534	coro->cctx = cctx_new ();
		1535	else if (!(coro->cctx->flags & CC_TRACE))
		1536	croak ("cannot enable tracing on coroutine with custom stack");
		1537
		1538	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1539	}
		1540	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1541	{
		1542	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1543
		1544	if (coro->flags & CF_RUNNING)
		1545	PL_runops = RUNOPS_DEFAULT;
		1546	else
		1547	coro->slot->runops = RUNOPS_DEFAULT;
		1548	}
		1549	}
		1550
990	MODULE = Coro::State PACKAGE = Coro::State	1551	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1552
992	PROTOTYPES: DISABLE	1553	PROTOTYPES: DISABLE
993		1554
994	BOOT:	1555	BOOT:
995	{	1556	{
996	#ifdef USE_ITHREADS	1557	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1558	MUTEX_INIT (&coro_mutex);
998	#endif	1559	#endif
999	BOOT_PAGESIZE;	1560	BOOT_PAGESIZE;
1000		1561
		1562	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1563	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1564
		1565	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1566	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1567	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1568	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1569
		1570	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1571	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1572	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1573
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1574	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1575
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1576	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1577	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1578	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1579	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1580
1007	main_mainstack = PL_mainstack;	1581	main_mainstack = PL_mainstack;
		1582	main_top_env = PL_top_env;
		1583
		1584	while (main_top_env->je_prev)
		1585	main_top_env = main_top_env->je_prev;
1008		1586
1009	coroapi.ver = CORO_API_VERSION;	1587	coroapi.ver = CORO_API_VERSION;
		1588	coroapi.rev = CORO_API_REVISION;
1010	coroapi.transfer = api_transfer;	1589	coroapi.transfer = api_transfer;
1011		1590
1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1591	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013	}	1592	}
1014		1593
1015	SV *	1594	SV *
1016	new (char *klass, ...)	1595	new (char *klass, ...)
1017	CODE:	1596	CODE:
1018	{	1597	{
1019	struct coro *coro;	1598	struct coro *coro;
		1599	MAGIC *mg;
1020	HV *hv;	1600	HV *hv;
1021	int i;	1601	int i;
1022		1602
1023	Newz (0, coro, 1, struct coro);	1603	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1604	coro->args = newAV ();
		1605	coro->flags = CF_NEW;
1025		1606
		1607	if (coro_first) coro_first->prev = coro;
		1608	coro->next = coro_first;
		1609	coro_first = coro;
		1610
1026	hv = newHV ();	1611	coro->hv = hv = newHV ();
1027	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1612	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1613	mg->mg_flags \|= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1614	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1615
		1616	av_extend (coro->args, items - 1);
1030	for (i = 1; i < items; i++)	1617	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1618	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/coro->mainstack = 0; //actual work is done inside transfer /
1034	/coro->stack = 0;/
1035	}	1619	}
1036	OUTPUT:	1620	OUTPUT:
1037	RETVAL	1621	RETVAL
1038		1622
		1623	# these not obviously related functions are all rolled into the same xs
		1624	# function to increase chances that they all will call transfer with the same
		1625	# stack offset
1039	void	1626	void
1040	_set_stacklevel (...)	1627	_set_stacklevel (...)
1041	ALIAS:	1628	ALIAS:
1042	Coro::State::transfer = 1	1629	Coro::State::transfer = 1
1043	Coro::schedule = 2	1630	Coro::schedule = 2
1044	Coro::cede = 3	1631	Coro::cede = 3
1045	Coro::Cont::yield = 4	1632	Coro::cede_notself = 4
1046	CODE:	1633	CODE:
1047	{	1634	{
1048	struct transfer_args ta;	1635	struct transfer_args ta;
1049		1636
		1637	PUTBACK;
1050	switch (ix)	1638	switch (ix)
1051	{	1639	{
1052	case 0:	1640	case 0:
1053	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1641	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1054	ta.next = 0;	1642	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1643	break;
1057		1644
1058	case 1:	1645	case 1:
1059	if (items != 3)	1646	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1647	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1648
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1649	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1650	break;
1064		1651
1065	case 2:	1652	case 2:
1066	prepare_schedule (&ta);	1653	prepare_schedule (aTHX_ &ta);
1067	break;	1654	break;
1068		1655
1069	case 3:	1656	case 3:
1070	prepare_cede (&ta);	1657	prepare_cede (aTHX_ &ta);
1071	break;	1658	break;
1072		1659
1073	case 4:	1660	case 4:
1074	{	1661	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1662	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1663
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1664	break;
1098
1099	}	1665	}
		1666	SPAGAIN;
1100		1667
		1668	BARRIER;
		1669	PUTBACK;
1101	TRANSFER (ta);	1670	TRANSFER (ta, 0);
		1671	SPAGAIN; /* might be the sp of a different coroutine now */
		1672	/* be extra careful not to ever do anything after TRANSFER */
1102	}	1673	}
1103		1674
1104	void	1675	bool
1105	_clone_state_from (SV dst, SV src)	1676	_destroy (SV *coro_sv)
1106	CODE:	1677	CODE:
1107	{	1678	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1679	OUTPUT:
1109		1680	RETVAL
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1114	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1681
1122	void	1682	void
1123	_exit (code)	1683	_exit (code)
1124	int code	1684	int code
1125	PROTOTYPE: $	1685	PROTOTYPE: $
1126	CODE:	1686	CODE:
1127	_exit (code);	1687	_exit (code);
1128		1688
		1689	int
		1690	cctx_stacksize (int new_stacksize = 0)
		1691	CODE:
		1692	RETVAL = coro_stacksize;
		1693	if (new_stacksize)
		1694	coro_stacksize = new_stacksize;
		1695	OUTPUT:
		1696	RETVAL
		1697
		1698	int
		1699	cctx_count ()
		1700	CODE:
		1701	RETVAL = cctx_count;
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	int
		1706	cctx_idle ()
		1707	CODE:
		1708	RETVAL = cctx_idle;
		1709	OUTPUT:
		1710	RETVAL
		1711
		1712	void
		1713	list ()
		1714	PPCODE:
		1715	{
		1716	struct coro *coro;
		1717	for (coro = coro_first; coro; coro = coro->next)
		1718	if (coro->hv)
		1719	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1720	}
		1721
		1722	void
		1723	call (Coro::State coro, SV *coderef)
		1724	ALIAS:
		1725	eval = 1
		1726	CODE:
		1727	{
		1728	if (coro->mainstack)
		1729	{
		1730	struct coro temp;
		1731
		1732	if (!(coro->flags & CF_RUNNING))
		1733	{
		1734	PUTBACK;
		1735	save_perl (aTHX_ &temp);
		1736	load_perl (aTHX_ coro);
		1737	}
		1738
		1739	{
		1740	dSP;
		1741	ENTER;
		1742	SAVETMPS;
		1743	PUTBACK;
		1744	PUSHSTACK;
		1745	PUSHMARK (SP);
		1746
		1747	if (ix)
		1748	eval_sv (coderef, 0);
		1749	else
		1750	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1751
		1752	POPSTACK;
		1753	SPAGAIN;
		1754	FREETMPS;
		1755	LEAVE;
		1756	PUTBACK;
		1757	}
		1758
		1759	if (!(coro->flags & CF_RUNNING))
		1760	{
		1761	save_perl (aTHX_ coro);
		1762	load_perl (aTHX_ &temp);
		1763	SPAGAIN;
		1764	}
		1765	}
		1766	}
		1767
		1768	SV *
		1769	is_ready (Coro::State coro)
		1770	PROTOTYPE: $
		1771	ALIAS:
		1772	is_ready = CF_READY
		1773	is_running = CF_RUNNING
		1774	is_new = CF_NEW
		1775	is_destroyed = CF_DESTROYED
		1776	CODE:
		1777	RETVAL = boolSV (coro->flags & ix);
		1778	OUTPUT:
		1779	RETVAL
		1780
		1781	void
		1782	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1783
		1784	SV *
		1785	has_stack (Coro::State coro)
		1786	PROTOTYPE: $
		1787	CODE:
		1788	RETVAL = boolSV (!!coro->cctx);
		1789	OUTPUT:
		1790	RETVAL
		1791
		1792	int
		1793	is_traced (Coro::State coro)
		1794	PROTOTYPE: $
		1795	CODE:
		1796	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1797	OUTPUT:
		1798	RETVAL
		1799
		1800	IV
		1801	rss (Coro::State coro)
		1802	PROTOTYPE: $
		1803	ALIAS:
		1804	usecount = 1
		1805	CODE:
		1806	switch (ix)
		1807	{
		1808	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1809	case 1: RETVAL = coro->usecount; break;
		1810	}
		1811	OUTPUT:
		1812	RETVAL
		1813
		1814	void
		1815	force_cctx ()
		1816	CODE:
		1817	struct coro *coro = SvSTATE (coro_current);
		1818	coro->cctx->idle_sp = 0;
		1819
1129	MODULE = Coro::State PACKAGE = Coro	1820	MODULE = Coro::State PACKAGE = Coro
1130		1821
1131	BOOT:	1822	BOOT:
1132	{	1823	{
1133	int i;	1824	int i;
1134		1825
		1826	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1827	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1828	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1829
		1830	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1831	SvREADONLY_on (coro_current);
		1832
1135	coro_stash = gv_stashpv ("Coro", TRUE);	1833	coro_stash = gv_stashpv ("Coro", TRUE);
1136		1834
1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1835	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1836	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1837	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1838	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1839	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1840	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1841
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1842	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1843	coro_ready[i] = newAV ();
1149		1844
1150	{	1845	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1846	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1847	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1152		1848
1153	coroapi.schedule = api_schedule;	1849	coroapi.schedule = api_schedule;
1154	coroapi.cede = api_cede;	1850	coroapi.cede = api_cede;
		1851	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1852	coroapi.ready = api_ready;
		1853	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1854	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1855	coroapi.current = coro_current;
1158		1856
1159	GCoroAPI = &coroapi;	1857	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1858	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1859	SvREADONLY_on (sv);
1162	}	1860	}
1163	}	1861	}
		1862
		1863	void
		1864	_set_current (SV *current)
		1865	PROTOTYPE: $
		1866	CODE:
		1867	SvREFCNT_dec (SvRV (coro_current));
		1868	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1869
1165	int	1870	int
1166	prio (Coro::State coro, int newprio = 0)	1871	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1872	ALIAS:
1168	nice = 1	1873	nice = 1
…		…
1171	RETVAL = coro->prio;	1876	RETVAL = coro->prio;
1172		1877
1173	if (items > 1)	1878	if (items > 1)
1174	{	1879	{
1175	if (ix)	1880	if (ix)
1176	newprio += coro->prio;	1881	newprio = coro->prio - newprio;
1177		1882
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1883	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1884	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1885
1181	coro->prio = newprio;	1886	coro->prio = newprio;
1182	}	1887	}
1183	}	1888	}
		1889	OUTPUT:
		1890	RETVAL
1184		1891
1185	void	1892	SV *
1186	ready (SV *self)	1893	ready (SV *self)
1187	PROTOTYPE: $	1894	PROTOTYPE: $
1188	CODE:	1895	CODE:
1189	api_ready (self);	1896	RETVAL = boolSV (api_ready (self));
		1897	OUTPUT:
		1898	RETVAL
1190		1899
1191	int	1900	int
1192	nready (...)	1901	nready (...)
1193	PROTOTYPE:	1902	PROTOTYPE:
1194	CODE:	1903	CODE:
1195	RETVAL = coro_nready;	1904	RETVAL = coro_nready;
1196	OUTPUT:	1905	OUTPUT:
1197	RETVAL	1906	RETVAL
1198		1907
		1908	void
		1909	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1910	PROTOTYPE: $;$
		1911	CODE:
		1912	SvREFCNT_dec (self->throw);
		1913	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1914
		1915	void
		1916	swap_defsv (Coro::State self)
		1917	PROTOTYPE: $
		1918	ALIAS:
		1919	swap_defav = 1
		1920	CODE:
		1921	if (!self->slot)
		1922	croak ("cannot swap state with coroutine that has no saved state");
		1923	else
		1924	{
		1925	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1926	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
		1927
		1928	SV tmp = src; src = dst; *dst = tmp;
		1929	}
		1930
		1931	# for async_pool speedup
		1932	void
		1933	_pool_1 (SV *cb)
		1934	CODE:
		1935	{
		1936	struct coro *coro = SvSTATE (coro_current);
		1937	HV hv = (HV )SvRV (coro_current);
		1938	AV *defav = GvAV (PL_defgv);
		1939	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1940	AV *invoke_av;
		1941	int i, len;
		1942
		1943	if (!invoke)
		1944	{
		1945	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1946	croak ("\3async_pool terminate\2\n");
		1947	}
		1948
		1949	SvREFCNT_dec (coro->saved_deffh);
		1950	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1951
		1952	hv_store (hv, "desc", sizeof ("desc") - 1,
		1953	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1954
		1955	invoke_av = (AV *)SvRV (invoke);
		1956	len = av_len (invoke_av);
		1957
		1958	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1959
		1960	if (len > 0)
		1961	{
		1962	av_fill (defav, len - 1);
		1963	for (i = 0; i < len; ++i)
		1964	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1965	}
		1966
		1967	SvREFCNT_dec (invoke);
		1968	}
		1969
		1970	void
		1971	_pool_2 (SV *cb)
		1972	CODE:
		1973	{
		1974	struct coro *coro = SvSTATE (coro_current);
		1975
		1976	sv_setsv (cb, &PL_sv_undef);
		1977
		1978	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1979	coro->saved_deffh = 0;
		1980
		1981	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1982	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1983	{
		1984	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1985	croak ("\3async_pool terminate\2\n");
		1986	}
		1987
		1988	av_clear (GvAV (PL_defgv));
		1989	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1990	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1991
		1992	coro->prio = 0;
		1993
		1994	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1995	api_trace (coro_current, 0);
		1996
		1997	av_push (av_async_pool, newSVsv (coro_current));
		1998	}
		1999
		2000
1199	MODULE = Coro::State PACKAGE = Coro::AIO	2001	MODULE = Coro::State PACKAGE = Coro::AIO
1200		2002
1201	SV *	2003	SV *
1202	_get_state ()	2004	_get_state ()
1203	CODE:	2005	CODE:
1204	{	2006	{
1205	struct {	2007	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		2008
		2009	RETVAL = newSV (sizeof (struct io_state));
		2010	data = (struct io_state *)SvPVX (RETVAL);
		2011	SvCUR_set (RETVAL, sizeof (struct io_state));
		2012	SvPOK_only (RETVAL);
		2013
1212	data.errorno = errno;	2014	data->errorno = errno;
1213	data.laststype = PL_laststype;	2015	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	2016	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	2017	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	2018	}
1219	OUTPUT:	2019	OUTPUT:
1220	RETVAL	2020	RETVAL
1221		2021
1222	void	2022	void
1223	_set_state (char *data_)	2023	_set_state (char *data_)
1224	PROTOTYPE: $	2024	PROTOTYPE: $
1225	CODE:	2025	CODE:
1226	{	2026	{
1227	struct {	2027	struct io_state data = (void )data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} data = (void )data_;
1233		2028
1234	errno = data->errorno;	2029	errno = data->errorno;
1235	PL_laststype = data->laststype;	2030	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	2031	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	2032	PL_statcache = data->statcache;
1238	}	2033	}
		2034

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Comparing Coro/Coro/State.xs (file contents): Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs. Revision 1.227 by root, Sat Apr 5 22:29:54 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.227 by root, Sat Apr 5 22:29:54 2008 UTC