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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.105 by root, Mon Nov 27 02:01:33 2006 UTC vs.
Revision 1.221 by root, Sun Jan 13 09:47:22 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
		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
9	#if USE_VALGRIND	40	#if CORO_USE_VALGRIND
10	# include <valgrind/valgrind.h>	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)
11	#endif	45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
12		49
13	#define PERL_VERSION_ATLEAST(a,b,c) \	50	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \	51	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \	52	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \	53	&& (PERL_VERSION > (b) \
…		…
35	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
37	# endif	74	# endif
38	#endif	75	#endif
39		76
40	#include <stdio.h>	77	/* 5.8.7 */
41	#include <errno.h>	78	#ifndef SvRV_set
		79	# define SvRV_set(s,v) SvRV(s) = (v)
		80	#endif
		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
42		89
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD	91	# undef CORO_STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50
51	#ifdef HAVE_MMAP
52	# include <unistd.h>
53	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS
55	# ifdef MAP_ANON
56	# define MAP_ANONYMOUS MAP_ANON
57	# else
58	# undef HAVE_MMAP
59	# endif
60	# endif	92	#endif
61	# include <limits.h>	93
62	# ifndef PAGESIZE	94	#ifndef CORO_STACKGUARD
63	# define PAGESIZE pagesize	95	# define CORO_STACKGUARD 0
64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65	static long pagesize;
66	# else
67	# define BOOT_PAGESIZE
68	# endif	96	#endif
69	#endif
70		97
71	/* The next macro should declare a variable stacklevel that contains and approximation	98	/* prefer perl internal functions over our own? */
72	* to the current C stack pointer. Its property is that it changes with each call	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
73	* and should be unique. */	100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
		102
		103	/* The next macros try to return the current stack pointer, in an as
		104	* portable way as possible. */
74	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
75	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
76		107
77	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
78		109
79	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
80	# define attribute(x) __attribute__(x)	111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
81	#else	114	#else
82	# define attribute(x)	115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
83	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
84		122
85	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
86		124
87	#include "CoroAPI.h"	125	#include "CoroAPI.h"
88
89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90		126
91	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
92	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
93	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
94	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95	#else	131	#else
96	# define LOCK (void)0	132	# define LOCK (void)0
97	# define UNLOCK (void)0	133	# define UNLOCK (void)0
98	#endif	134	#endif
99		135
		136	/* helper storage struct for Coro::AIO */
		137	struct io_state
		138	{
		139	int errorno;
		140	I32 laststype;
		141	int laststatval;
		142	Stat_t statcache;
		143	};
		144
		145	static size_t coro_stacksize = CORO_STACKSIZE;
100	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
101	static AV *main_mainstack; /* used to differentiate between $main and others */	147	static AV *main_mainstack; /* used to differentiate between $main and others */
		148	static JMPENV *main_top_env;
102	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
103	static SV *coro_mortal; /* will be freed after next transfer */	150	static volatile SV *coro_mortal; /* will be freed after next transfer */
		151
		152	static GV *irsgv; /* $/ */
		153	static GV *stdoutgv; /* *STDOUT */
		154	static SV *rv_diehook;
		155	static SV *rv_warnhook;
		156	static HV *hv_sig; /* %SIG */
		157
		158	/* async_pool helper stuff */
		159	static SV *sv_pool_rss;
		160	static SV *sv_pool_size;
		161	static AV *av_async_pool;
		162
		163	static struct coro_cctx *cctx_first;
		164	static int cctx_count, cctx_idle;
		165
		166	enum {
		167	CC_MAPPED = 0x01,
		168	CC_NOREUSE = 0x02, /* throw this away after tracing */
		169	CC_TRACE = 0x04,
		170	CC_TRACE_SUB = 0x08, /* trace sub calls */
		171	CC_TRACE_LINE = 0x10, /* trace each statement */
		172	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		173	};
104		174
105	/* this is a structure representing a c-level coroutine */	175	/* this is a structure representing a c-level coroutine */
106	typedef struct coro_stack {	176	typedef struct coro_cctx {
107	struct coro_stack *next;	177	struct coro_cctx *next;
108		178
109	/* the stack */	179	/* the stack */
110	void *sptr;	180	void *sptr;
111	long ssize; /* positive == mmap, otherwise malloc */	181	size_t ssize;
112		182
113	/* cpu state */	183	/* cpu state */
114	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	184	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		185	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
115	JMPENV *top_env;	186	JMPENV *top_env;
116	coro_context cctx;	187	coro_context cctx;
117		188
118	#if USE_VALGRIND	189	#if CORO_USE_VALGRIND
119	int valgrind_id;	190	int valgrind_id;
120	#endif	191	#endif
121	} coro_stack;	192	unsigned char flags;
		193	} coro_cctx;
		194
		195	enum {
		196	CF_RUNNING = 0x0001, /* coroutine is running */
		197	CF_READY = 0x0002, /* coroutine is ready */
		198	CF_NEW = 0x0004, /* has never been switched to */
		199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		200	};
		201
		202	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		203	typedef struct {
		204	SV *defsv;
		205	AV *defav;
		206	SV *errsv;
		207	SV *irsgv;
		208	#define VAR(name,type) type name;
		209	# include "state.h"
		210	#undef VAR
		211	} perl_slots;
		212
		213	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
122		214
123	/* this is a structure representing a perl-level coroutine */	215	/* this is a structure representing a perl-level coroutine */
124	struct coro {	216	struct coro {
125	/* the c coroutine allocated to this perl coroutine, if any */	217	/* the c coroutine allocated to this perl coroutine, if any */
126	coro_stack *stack;	218	coro_cctx *cctx;
127		219
128	/* data associated with this coroutine (initial args) */	220	/* process data */
129	AV *args;
130	int refcnt;
131
132	/* optionally saved, might be zero */
133	AV *defav;
134	SV *defsv;
135	SV *errsv;
136
137	/* saved global state not related to stacks */
138	U8 dowarn;
139	I32 in_eval;
140
141	/* the stacks and related info (callchain etc..) */
142	PERL_SI *curstackinfo;
143	AV *curstack;
144	AV *mainstack;	221	AV *mainstack;
145	SV **stack_sp;	222	perl_slots *slot; /* basically the saved sp */
146	OP *op;	223
147	SV **curpad;	224	AV *args; /* data associated with this coroutine (initial args) */
148	AV *comppad;	225	int refcnt; /* coroutines are refcounted, yes */
149	CV *compcv;	226	int flags; /* CF_ flags */
150	SV **stack_base;	227	HV *hv; /* the perl hash associated with this coro, if any */
151	SV **stack_max;	228
152	SV **tmps_stack;	229	/* statistics */
153	I32 tmps_floor;	230	int usecount; /* number of transfers to this coro */
154	I32 tmps_ix;
155	I32 tmps_max;
156	I32 *markstack;
157	I32 *markstack_ptr;
158	I32 *markstack_max;
159	I32 *scopestack;
160	I32 scopestack_ix;
161	I32 scopestack_max;
162	ANY *savestack;
163	I32 savestack_ix;
164	I32 savestack_max;
165	OP **retstack;
166	I32 retstack_ix;
167	I32 retstack_max;
168	PMOP *curpm;
169	COP *curcop;
170		231
171	/* coro process data */	232	/* coro process data */
172	int prio;	233	int prio;
		234	SV *throw; /* exception to be thrown */
		235
		236	/* async_pool */
		237	SV *saved_deffh;
		238
		239	/* linked list */
		240	struct coro *next, *prev;
173	};	241	};
174		242
175	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
176	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
177		245
		246	/** Coro ********************************************************************/
		247
		248	#define PRIO_MAX 3
		249	#define PRIO_HIGH 1
		250	#define PRIO_NORMAL 0
		251	#define PRIO_LOW -1
		252	#define PRIO_IDLE -3
		253	#define PRIO_MIN -4
		254
		255	/* for Coro.pm */
		256	static SV *coro_current;
		257	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		258	static int coro_nready;
		259	static struct coro *coro_first;
		260
		261	/** lowlevel stuff **********************************************************/
		262
		263	static SV *
		264	coro_get_sv (pTHX_ const char *name, int create)
		265	{
		266	#if PERL_VERSION_ATLEAST (5,9,0)
		267	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		268	get_sv (name, create);
		269	#endif
		270	return get_sv (name, create);
		271	}
		272
178	static AV *	273	static AV *
		274	coro_get_av (pTHX_ const char *name, int create)
		275	{
		276	#if PERL_VERSION_ATLEAST (5,9,0)
		277	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		278	get_av (name, create);
		279	#endif
		280	return get_av (name, create);
		281	}
		282
		283	static HV *
		284	coro_get_hv (pTHX_ const char *name, int create)
		285	{
		286	#if PERL_VERSION_ATLEAST (5,9,0)
		287	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		288	get_hv (name, create);
		289	#endif
		290	return get_hv (name, create);
		291	}
		292
		293	static AV *
179	coro_clone_padlist (CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
180	{	295	{
181	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
182	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
183		298
184	newpadlist = newAV ();	299	newpadlist = newAV ();
…		…
196		311
197	return newpadlist;	312	return newpadlist;
198	}	313	}
199		314
200	static void	315	static void
201	free_padlist (AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
202	{	317	{
203	/* may be during global destruction */	318	/* may be during global destruction */
204	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
205	{	320	{
206	I32 i = AvFILLp (padlist);	321	I32 i = AvFILLp (padlist);
…		…
227	AV *padlist;	342	AV *padlist;
228	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
229		344
230	/* casting is fun. */	345	/* casting is fun. */
231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
232	free_padlist (padlist);	347	free_padlist (aTHX_ padlist);
233
234	SvREFCNT_dec (av);
235		348
236	return 0;	349	return 0;
237	}	350	}
238		351
239	#define PERL_MAGIC_coro PERL_MAGIC_ext	352	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		353	#define CORO_MAGIC_type_state PERL_MAGIC_ext
240		354
241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	355	static MGVTBL coro_cv_vtbl = {
		356	0, 0, 0, 0,
		357	coro_cv_free
		358	};
		359
		360	#define CORO_MAGIC(sv,type) \
		361	SvMAGIC (sv) \
		362	? SvMAGIC (sv)->mg_type == type \
		363	? SvMAGIC (sv) \
		364	: mg_find (sv, type) \
		365	: 0
		366
		367	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		368	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		369
		370	static struct coro *
		371	SvSTATE_ (pTHX_ SV *coro)
		372	{
		373	HV *stash;
		374	MAGIC *mg;
		375
		376	if (SvROK (coro))
		377	coro = SvRV (coro);
		378
		379	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		380	croak ("Coro::State object required");
		381
		382	stash = SvSTASH (coro);
		383	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		384	{
		385	/* very slow, but rare, check */
		386	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		387	croak ("Coro::State object required");
		388	}
		389
		390	mg = CORO_MAGIC_state (coro);
		391	return (struct coro *)mg->mg_ptr;
		392	}
		393
		394	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
242		395
243	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
244	static void	397	static void
245	get_padlist (CV *cv)	398	get_padlist (pTHX_ CV *cv)
246	{	399	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
		401	AV *av;
248		402
249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
250	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251	else	405	else
252	{	406	{
253	#if 0	407	#if CORO_PREFER_PERL_FUNCTIONS
254	/* this is probably cleaner, but also slower? */	408	/* this is probably cleaner, but also slower? */
255	CV *cp = Perl_cv_clone (cv);	409	CV *cp = Perl_cv_clone (cv);
256	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
257	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
258	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
259	#else	413	#else
260	CvPADLIST (cv) = coro_clone_padlist (cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
261	#endif	415	#endif
262	}	416	}
263	}	417	}
264		418
265	static void	419	static void
266	put_padlist (CV *cv)	420	put_padlist (pTHX_ CV *cv)
267	{	421	{
268	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
		423	AV *av;
269		424
270	if (!mg)	425	if (expect_false (!mg))
271	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
272	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274	mg->mg_virtual = &vtbl_coro;
275	mg->mg_obj = (SV *)newAV ();
276	}
277		427
278	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	428	av = (AV *)mg->mg_obj;
279	}
280		429
281	#define SB do {	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
282	#define SE } while (0)	431	av_extend (av, AvMAX (av) + 1);
283		432
284	#define LOAD(state) load_state((state));	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285	#define SAVE(state,flags) save_state((state),(flags));	434	}
286		435
287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	436	/** load & save, init *******************************************************/
288		437
289	static void	438	static void
290	load_state(Coro__State c)	439	load_perl (pTHX_ Coro__State c)
291	{	440	{
292	PL_dowarn = c->dowarn;	441	perl_slots *slot = c->slot;
293	PL_in_eval = c->in_eval;	442	c->slot = 0;
294		443
295	PL_curstackinfo = c->curstackinfo;
296	PL_curstack = c->curstack;
297	PL_mainstack = c->mainstack;	444	PL_mainstack = c->mainstack;
298	PL_stack_sp = c->stack_sp;
299	PL_op = c->op;
300	PL_curpad = c->curpad;
301	PL_comppad = c->comppad;
302	PL_compcv = c->compcv;
303	PL_stack_base = c->stack_base;
304	PL_stack_max = c->stack_max;
305	PL_tmps_stack = c->tmps_stack;
306	PL_tmps_floor = c->tmps_floor;
307	PL_tmps_ix = c->tmps_ix;
308	PL_tmps_max = c->tmps_max;
309	PL_markstack = c->markstack;
310	PL_markstack_ptr = c->markstack_ptr;
311	PL_markstack_max = c->markstack_max;
312	PL_scopestack = c->scopestack;
313	PL_scopestack_ix = c->scopestack_ix;
314	PL_scopestack_max = c->scopestack_max;
315	PL_savestack = c->savestack;
316	PL_savestack_ix = c->savestack_ix;
317	PL_savestack_max = c->savestack_max;
318	#if !PERL_VERSION_ATLEAST (5,9,0)
319	PL_retstack = c->retstack;
320	PL_retstack_ix = c->retstack_ix;
321	PL_retstack_max = c->retstack_max;
322	#endif
323	PL_curpm = c->curpm;
324	PL_curcop = c->curcop;
325		445
326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	446	GvSV (PL_defgv) = slot->defsv;
327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	447	GvAV (PL_defgv) = slot->defav;
328	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	448	GvSV (PL_errgv) = slot->errsv;
		449	GvSV (irsgv) = slot->irsgv;
		450
		451	#define VAR(name,type) PL_ ## name = slot->name;
		452	# include "state.h"
		453	#undef VAR
329		454
330	{	455	{
331	dSP;	456	dSP;
		457
332	CV *cv;	458	CV *cv;
333		459
334	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
335	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
336	{	462	{
337	AV *padlist = (AV *)POPs;
338
339	if (padlist)
340	{
341	put_padlist (cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
342	CvPADLIST(cv) = padlist;	464	CvDEPTH (cv) = PTR2IV (POPs);
343	}	465	CvPADLIST (cv) = (AV *)POPs;
344
345	++CvDEPTH(cv);
346	}	466	}
347		467
348	PUTBACK;	468	PUTBACK;
349	}	469	}
350	}	470	}
351		471
352	static void	472	static void
353	save_state(Coro__State c, int flags)	473	save_perl (pTHX_ Coro__State c)
354	{	474	{
355	{	475	{
356	dSP;	476	dSP;
357	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
358	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
361	/*	481	/*
362	* the worst thing you can imagine happens first - we have to save	482	* the worst thing you can imagine happens first - we have to save
363	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
364	*/	484	*/
365		485
366	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
367	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
368	for (;;)	488	for (;;)
369	{	489	{
370	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
371	{	491	{
372	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
373		493
374	if (CxTYPE(cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375	{	495	{
376	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
		497
377	if (CvDEPTH(cv))	498	if (expect_true (CvDEPTH (cv)))
378	{	499	{
379	EXTEND (SP, CvDEPTH(cv)*2);	500	EXTEND (SP, 3);
380
381	while (--CvDEPTH(cv))
382	{
383	/* this tells the restore code to increment CvDEPTH */
384	PUSHs (Nullsv);
385	PUSHs ((SV *)cv);
386	}
387
388	PUSHs ((SV *)CvPADLIST(cv));	501	PUSHs ((SV *)CvPADLIST (cv));
		502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
389	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
390		504
		505	CvDEPTH (cv) = 0;
391	get_padlist (cv);	506	get_padlist (aTHX_ cv);
392	}	507	}
393	}	508	}
394	#ifdef CXt_FORMAT
395	else if (CxTYPE(cx) == CXt_FORMAT)
396	{
397	/* I never used formats, so how should I know how these are implemented? */
398	/* my bold guess is as a simple, plain sub... */
399	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400	}
401	#endif
402	}	509	}
403		510
404	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
405	break;	512	break;
406		513
407	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
408	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
409	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
410	}	517	}
411		518
412	PUTBACK;	519	PUTBACK;
413	}	520	}
414		521
415	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
416	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
417	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	524	if (SLOT_COUNT >= 1) CXINC;
		525	if (SLOT_COUNT >= 2) CXINC;
		526	if (SLOT_COUNT >= 3) CXINC;
		527	{
		528	int i;
		529	for (i = 3; i < SLOT_COUNT; ++i)
		530	CXINC;
		531	}
		532	cxstack_ix -= SLOT_COUNT; /* undo allocation */
418		533
419	c->dowarn = PL_dowarn;
420	c->in_eval = PL_in_eval;
421
422	c->curstackinfo = PL_curstackinfo;
423	c->curstack = PL_curstack;
424	c->mainstack = PL_mainstack;	534	c->mainstack = PL_mainstack;
425	c->stack_sp = PL_stack_sp;	535
426	c->op = PL_op;	536	{
427	c->curpad = PL_curpad;	537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428	c->comppad = PL_comppad;	538
429	c->compcv = PL_compcv;	539	slot->defav = GvAV (PL_defgv);
430	c->stack_base = PL_stack_base;	540	slot->defsv = DEFSV;
431	c->stack_max = PL_stack_max;	541	slot->errsv = ERRSV;
432	c->tmps_stack = PL_tmps_stack;	542	slot->irsgv = GvSV (irsgv);
433	c->tmps_floor = PL_tmps_floor;	543
434	c->tmps_ix = PL_tmps_ix;	544	#define VAR(name,type) slot->name = PL_ ## name;
435	c->tmps_max = PL_tmps_max;	545	# include "state.h"
436	c->markstack = PL_markstack;	546	#undef VAR
437	c->markstack_ptr = PL_markstack_ptr;	547	}
438	c->markstack_max = PL_markstack_max;
439	c->scopestack = PL_scopestack;
440	c->scopestack_ix = PL_scopestack_ix;
441	c->scopestack_max = PL_scopestack_max;
442	c->savestack = PL_savestack;
443	c->savestack_ix = PL_savestack_ix;
444	c->savestack_max = PL_savestack_max;
445	#if !PERL_VERSION_ATLEAST (5,9,0)
446	c->retstack = PL_retstack;
447	c->retstack_ix = PL_retstack_ix;
448	c->retstack_max = PL_retstack_max;
449	#endif
450	c->curpm = PL_curpm;
451	c->curcop = PL_curcop;
452	}	548	}
453		549
454	/*	550	/*
455	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
456	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
457	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
458	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
459	*/	555	*/
		556	#if CORO_PREFER_PERL_FUNCTIONS
		557	# define coro_init_stacks init_stacks
		558	#else
460	static void	559	static void
461	coro_init_stacks ()	560	coro_init_stacks (pTHX)
462	{	561	{
463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	562	PL_curstackinfo = new_stackinfo(32, 8);
464	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
465	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467		566
468	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
469	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471		570
472	New(50,PL_tmps_stack,96,SV*);	571	New(50,PL_tmps_stack,32,SV*);
473	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
474	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
475	PL_tmps_max = 96;	574	PL_tmps_max = 32;
476		575
477	New(54,PL_markstack,16,I32);	576	New(54,PL_markstack,16,I32);
478	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
479	PL_markstack_max = PL_markstack + 16;	578	PL_markstack_max = PL_markstack + 16;
480		579
481	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
482	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
483	#endif	582	#endif
484		583
485	New(54,PL_scopestack,16,I32);	584	New(54,PL_scopestack,8,I32);
486	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
487	PL_scopestack_max = 16;	586	PL_scopestack_max = 8;
488		587
489	New(54,PL_savestack,96,ANY);	588	New(54,PL_savestack,24,ANY);
490	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
491	PL_savestack_max = 96;	590	PL_savestack_max = 24;
492		591
493	#if !PERL_VERSION_ATLEAST (5,9,0)	592	#if !PERL_VERSION_ATLEAST (5,9,0)
494	New(54,PL_retstack,8,OP*);	593	New(54,PL_retstack,4,OP*);
495	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
496	PL_retstack_max = 8;	595	PL_retstack_max = 4;
497	#endif	596	#endif
498	}	597	}
		598	#endif
499		599
500	/*	600	/*
501	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
502	*/	602	*/
503	static void	603	static void
504	coro_destroy_stacks()	604	coro_destroy_stacks (pTHX)
505	{	605	{
506	if (!IN_DESTRUCT)
507	{
508	/* is this ugly, I ask? */
509	LEAVE_SCOPE (0);
510
511	/* sure it is, but more important: is it correct?? :/ */
512	FREETMPS;
513
514	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
515	}
516
517	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
519		608
520	while (PL_curstackinfo)	609	while (PL_curstackinfo)
521	{	610	{
522	PERL_SI *p = PL_curstackinfo->si_prev;	611	PERL_SI *p = PL_curstackinfo->si_prev;
523		612
524	{ /*D*//*remove*/
525	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */
528	}
529
530	if (!IN_DESTRUCT)	613	if (!IN_DESTRUCT)
531	{
532	dounwind (-1);/*D*//*remove*/
533	SvREFCNT_dec (PL_curstackinfo->si_stack);	614	SvREFCNT_dec (PL_curstackinfo->si_stack);
534	}
535		615
536	Safefree (PL_curstackinfo->si_cxstack);	616	Safefree (PL_curstackinfo->si_cxstack);
537	Safefree (PL_curstackinfo);	617	Safefree (PL_curstackinfo);
538	PL_curstackinfo = p;	618	PL_curstackinfo = p;
539	}	619	}
…		…
545	#if !PERL_VERSION_ATLEAST (5,9,0)	625	#if !PERL_VERSION_ATLEAST (5,9,0)
546	Safefree (PL_retstack);	626	Safefree (PL_retstack);
547	#endif	627	#endif
548	}	628	}
549		629
		630	static size_t
		631	coro_rss (pTHX_ struct coro *coro)
		632	{
		633	size_t rss = sizeof (*coro);
		634
		635	if (coro->mainstack)
		636	{
		637	perl_slots tmp_slot;
		638	perl_slots *slot;
		639
		640	if (coro->flags & CF_RUNNING)
		641	{
		642	slot = &tmp_slot;
		643
		644	#define VAR(name,type) slot->name = PL_ ## name;
		645	# include "state.h"
		646	#undef VAR
		647	}
		648	else
		649	slot = coro->slot;
		650
		651	rss += sizeof (slot->curstackinfo);
		652	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		653	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		654	rss += slot->tmps_max * sizeof (SV *);
		655	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		656	rss += slot->scopestack_max * sizeof (I32);
		657	rss += slot->savestack_max * sizeof (ANY);
		658
		659	#if !PERL_VERSION_ATLEAST (5,9,0)
		660	rss += slot->retstack_max * sizeof (OP *);
		661	#endif
		662	}
		663
		664	return rss;
		665	}
		666
		667	/** coroutine stack handling ************************************************/
		668
		669	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		670	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		671
		672	/*
		673	* This overrides the default magic get method of %SIG elements.
		674	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		675	* and instead of tryign to save and restore the hash elements, we just provide
		676	* readback here.
		677	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		678	* not expecting this to actually change the hook. This is a potential problem
		679	* when a schedule happens then, but we ignore this.
		680	*/
		681	static int
		682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	const char *s = MgPV_nolen_const (mg);
		685
		686	if (*s == '_')
		687	{
		688	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		689	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		690	}
		691
		692	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		693	}
		694
		695	static int
		696	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		697	{
		698	const char *s = MgPV_nolen_const (mg);
		699
		700	if (*s == '_')
		701	{
		702	SV **svp = 0;
		703
		704	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		705	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		706
		707	if (svp)
		708	{
		709	SV *old = *svp;
		710	*svp = newSVsv (sv);
		711	SvREFCNT_dec (old);
		712	return;
		713	}
		714	}
		715
		716	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		717	}
		718
550	static void	719	static void
551	setup_coro (struct coro *coro)	720	coro_setup (pTHX_ struct coro *coro)
552	{	721	{
553	/*	722	/*
554	* emulate part of the perl startup here.	723	* emulate part of the perl startup here.
555	*/	724	*/
556
557	coro_init_stacks ();	725	coro_init_stacks (aTHX);
558		726
		727	PL_runops = RUNOPS_DEFAULT;
		728	PL_curcop = &PL_compiling;
		729	PL_in_eval = EVAL_NULL;
559	PL_curcop = 0;	730	PL_comppad = 0;
560	PL_in_eval = 0;
561	PL_curpm = 0;	731	PL_curpm = 0;
		732	PL_curpad = 0;
		733	PL_localizing = 0;
		734	PL_dirty = 0;
		735	PL_restartop = 0;
		736
		737	/* recreate the die/warn hooks */
		738	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		739	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		740
		741	GvSV (PL_defgv) = newSV (0);
		742	GvAV (PL_defgv) = coro->args; coro->args = 0;
		743	GvSV (PL_errgv) = newSV (0);
		744	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		745	PL_rs = newSVsv (GvSV (irsgv));
		746	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
562		747
563	{	748	{
564	dSP;	749	dSP;
565	LOGOP myop;	750	LOGOP myop;
566		751
567	/* I have no idea why this is needed, but it is */
568	PUSHMARK (SP);
569
570	SvREFCNT_dec (GvAV (PL_defgv));
571	GvAV (PL_defgv) = coro->args; coro->args = 0;
572
573	Zero (&myop, 1, LOGOP);	752	Zero (&myop, 1, LOGOP);
574	myop.op_next = Nullop;	753	myop.op_next = Nullop;
575	myop.op_flags = OPf_WANT_VOID;	754	myop.op_flags = OPf_WANT_VOID;
576		755
		756	PUSHMARK (SP);
		757	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		758	PUTBACK;
577	PL_op = (OP *)&myop;	759	PL_op = (OP *)&myop;
578
579	PUSHMARK (SP);
580	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581	PUTBACK;
582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	760	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583	SPAGAIN;	761	SPAGAIN;
584
585	ENTER; /* necessary e.g. for dounwind */
586	}	762	}
		763
		764	/* this newly created coroutine might be run on an existing cctx which most
		765	* likely was suspended in set_stacklevel, called from entersub.
		766	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		767	* so we ENTER here for symmetry
		768	*/
		769	ENTER;
587	}	770	}
588		771
589	static void	772	static void
		773	coro_destroy (pTHX_ struct coro *coro)
		774	{
		775	if (!IN_DESTRUCT)
		776	{
		777	/* restore all saved variables and stuff */
		778	LEAVE_SCOPE (0);
		779	assert (PL_tmps_floor == -1);
		780
		781	/* free all temporaries */
		782	FREETMPS;
		783	assert (PL_tmps_ix == -1);
		784
		785	/* unwind all extra stacks */
		786	POPSTACK_TO (PL_mainstack);
		787
		788	/* unwind main stack */
		789	dounwind (-1);
		790	}
		791
		792	SvREFCNT_dec (GvSV (PL_defgv));
		793	SvREFCNT_dec (GvAV (PL_defgv));
		794	SvREFCNT_dec (GvSV (PL_errgv));
		795	SvREFCNT_dec (PL_defoutgv);
		796	SvREFCNT_dec (PL_rs);
		797	SvREFCNT_dec (GvSV (irsgv));
		798
		799	SvREFCNT_dec (PL_diehook);
		800	SvREFCNT_dec (PL_warnhook);
		801
		802	SvREFCNT_dec (coro->saved_deffh);
		803	SvREFCNT_dec (coro->throw);
		804
		805	coro_destroy_stacks (aTHX);
		806	}
		807
		808	static void
590	free_coro_mortal ()	809	free_coro_mortal (pTHX)
591	{	810	{
592	if (coro_mortal)	811	if (expect_true (coro_mortal))
593	{	812	{
594	SvREFCNT_dec (coro_mortal);	813	SvREFCNT_dec (coro_mortal);
595	coro_mortal = 0;	814	coro_mortal = 0;
596	}	815	}
597	}	816	}
598		817
		818	static int
		819	runops_trace (pTHX)
		820	{
		821	COP *oldcop = 0;
		822	int oldcxix = -2;
		823	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		824	coro_cctx *cctx = coro->cctx;
		825
		826	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		827	{
		828	PERL_ASYNC_CHECK ();
		829
		830	if (cctx->flags & CC_TRACE_ALL)
		831	{
		832	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		833	{
		834	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		835	SV **bot, **top;
		836	AV *av = newAV (); /* return values */
		837	SV **cb;
		838	dSP;
		839
		840	GV *gv = CvGV (cx->blk_sub.cv);
		841	SV *fullname = sv_2mortal (newSV (0));
		842	if (isGV (gv))
		843	gv_efullname3 (fullname, gv, 0);
		844
		845	bot = PL_stack_base + cx->blk_oldsp + 1;
		846	top = cx->blk_gimme == G_ARRAY ? SP + 1
		847	: cx->blk_gimme == G_SCALAR ? bot + 1
		848	: bot;
		849
		850	av_extend (av, top - bot);
		851	while (bot < top)
		852	av_push (av, SvREFCNT_inc (*bot++));
		853
		854	PL_runops = RUNOPS_DEFAULT;
		855	ENTER;
		856	SAVETMPS;
		857	EXTEND (SP, 3);
		858	PUSHMARK (SP);
		859	PUSHs (&PL_sv_no);
		860	PUSHs (fullname);
		861	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		862	PUTBACK;
		863	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		864	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		865	SPAGAIN;
		866	FREETMPS;
		867	LEAVE;
		868	PL_runops = runops_trace;
		869	}
		870
		871	if (oldcop != PL_curcop)
		872	{
		873	oldcop = PL_curcop;
		874
		875	if (PL_curcop != &PL_compiling)
		876	{
		877	SV **cb;
		878
		879	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		880	{
		881	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		882
		883	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		884	{
		885	runops_proc_t old_runops = PL_runops;
		886	dSP;
		887	GV *gv = CvGV (cx->blk_sub.cv);
		888	SV *fullname = sv_2mortal (newSV (0));
		889
		890	if (isGV (gv))
		891	gv_efullname3 (fullname, gv, 0);
		892
		893	PL_runops = RUNOPS_DEFAULT;
		894	ENTER;
		895	SAVETMPS;
		896	EXTEND (SP, 3);
		897	PUSHMARK (SP);
		898	PUSHs (&PL_sv_yes);
		899	PUSHs (fullname);
		900	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		901	PUTBACK;
		902	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		903	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		904	SPAGAIN;
		905	FREETMPS;
		906	LEAVE;
		907	PL_runops = runops_trace;
		908	}
		909
		910	oldcxix = cxstack_ix;
		911	}
		912
		913	if (cctx->flags & CC_TRACE_LINE)
		914	{
		915	dSP;
		916
		917	PL_runops = RUNOPS_DEFAULT;
		918	ENTER;
		919	SAVETMPS;
		920	EXTEND (SP, 3);
		921	PL_runops = RUNOPS_DEFAULT;
		922	PUSHMARK (SP);
		923	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		924	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		925	PUTBACK;
		926	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		927	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		928	SPAGAIN;
		929	FREETMPS;
		930	LEAVE;
		931	PL_runops = runops_trace;
		932	}
		933	}
		934	}
		935	}
		936	}
		937
		938	TAINT_NOT;
		939	return 0;
		940	}
		941
		942	/* inject a fake call to Coro::State::_cctx_init into the execution */
		943	/* _cctx_init should be careful, as it could be called at almost any time */
		944	/* during execution of a perl program */
599	static void NOINLINE	945	static void NOINLINE
600	prepare_cctx (coro_stack *cctx)	946	cctx_prepare (pTHX_ coro_cctx *cctx)
601	{	947	{
602	dSP;	948	dSP;
603	LOGOP myop;	949	LOGOP myop;
604		950
		951	PL_top_env = &PL_start_env;
		952
		953	if (cctx->flags & CC_TRACE)
		954	PL_runops = runops_trace;
		955
605	Zero (&myop, 1, LOGOP);	956	Zero (&myop, 1, LOGOP);
606	myop.op_next = PL_op;	957	myop.op_next = PL_op;
607	myop.op_flags = OPf_WANT_VOID;	958	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608
609	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610		959
611	PUSHMARK (SP);	960	PUSHMARK (SP);
		961	EXTEND (SP, 2);
		962	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
612	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	963	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
613	PUTBACK;	964	PUTBACK;
		965	PL_op = (OP *)&myop;
614	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	966	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615	SPAGAIN;	967	SPAGAIN;
616	}	968	}
617		969
		970	/*
		971	* this is a _very_ stripped down perl interpreter ;)
		972	*/
618	static void	973	static void
619	coro_run (void *arg)	974	cctx_run (void *arg)
620	{	975	{
		976	dTHX;
		977
621	/* coro_run is the alternative epilogue of transfer() */	978	/* cctx_run is the alternative tail of transfer(), so unlock here. */
622	UNLOCK;	979	UNLOCK;
623		980
		981	/* we now skip the entersub that lead to transfer() */
		982	PL_op = PL_op->op_next;
		983
		984	/* inject a fake subroutine call to cctx_init */
		985	cctx_prepare (aTHX_ (coro_cctx *)arg);
		986
		987	/* somebody or something will hit me for both perl_run and PL_restartop */
		988	PL_restartop = PL_op;
		989	perl_run (PL_curinterp);
		990
624	/*	991	/*
625	* this is a _very_ stripped down perl interpreter ;)	992	* If perl-run returns we assume exit() was being called or the coro
		993	* fell off the end, which seems to be the only valid (non-bug)
		994	* reason for perl_run to return. We try to exit by jumping to the
		995	* bootstrap-time "top" top_env, as we cannot restore the "main"
		996	* coroutine as Coro has no such concept
626	*/	997	*/
627	PL_top_env = &PL_start_env;	998	PL_top_env = main_top_env;
628	/* inject call to cctx_init */	999	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
629	prepare_cctx ((coro_stack *)arg);
630
631	/* somebody will hit me for both perl_run and PL_restartop */
632	perl_run (PL_curinterp);
633
634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
635	abort ();
636	}	1000	}
637		1001
638	static coro_stack *	1002	static coro_cctx *
639	stack_new ()	1003	cctx_new ()
640	{	1004	{
641	coro_stack *stack;	1005	coro_cctx *cctx;
		1006	void *stack_start;
		1007	size_t stack_size;
642		1008
		1009	++cctx_count;
		1010
643	New (0, stack, 1, coro_stack);	1011	Newz (0, cctx, 1, coro_cctx);
644		1012
645	#if HAVE_MMAP	1013	#if HAVE_MMAP
646
647	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1014	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
648	/* mmap suppsedly does allocate-on-write for us */	1015	/* mmap supposedly does allocate-on-write for us */
649	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1016	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650		1017
651	if (stack->sptr == (void *)-1)	1018	if (cctx->sptr != (void *)-1)
652	{
653	perror ("FATAL: unable to mmap stack for coroutine");
654	_exit (EXIT_FAILURE);
655	}	1019	{
656
657	# if STACKGUARD	1020	# if CORO_STACKGUARD
658	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1021	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
659	# endif	1022	# endif
		1023	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1024	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1025	cctx->flags |= CC_MAPPED;
		1026	}
		1027	else
		1028	#endif
		1029	{
		1030	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1031	New (0, cctx->sptr, coro_stacksize, long);
660		1032
		1033	if (!cctx->sptr)
		1034	{
		1035	perror ("FATAL: unable to allocate stack for coroutine");
		1036	_exit (EXIT_FAILURE);
		1037	}
		1038
		1039	stack_start = cctx->sptr;
		1040	stack_size = cctx->ssize;
		1041	}
		1042
		1043	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1044	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1045
		1046	return cctx;
		1047	}
		1048
		1049	static void
		1050	cctx_destroy (coro_cctx *cctx)
		1051	{
		1052	if (!cctx)
		1053	return;
		1054
		1055	--cctx_count;
		1056
		1057	#if CORO_USE_VALGRIND
		1058	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1059	#endif
		1060
		1061	#if HAVE_MMAP
		1062	if (cctx->flags & CC_MAPPED)
		1063	munmap (cctx->sptr, cctx->ssize);
		1064	else
		1065	#endif
		1066	Safefree (cctx->sptr);
		1067
		1068	Safefree (cctx);
		1069	}
		1070
		1071	/* wether this cctx should be destructed */
		1072	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1073
		1074	static coro_cctx *
		1075	cctx_get (pTHX)
		1076	{
		1077	while (expect_true (cctx_first))
		1078	{
		1079	coro_cctx *cctx = cctx_first;
		1080	cctx_first = cctx->next;
		1081	--cctx_idle;
		1082
		1083	if (expect_true (!CCTX_EXPIRED (cctx)))
		1084	return cctx;
		1085
		1086	cctx_destroy (cctx);
		1087	}
		1088
		1089	return cctx_new ();
		1090	}
		1091
		1092	static void
		1093	cctx_put (coro_cctx *cctx)
		1094	{
		1095	/* free another cctx if overlimit */
		1096	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1097	{
		1098	coro_cctx *first = cctx_first;
		1099	cctx_first = first->next;
		1100	--cctx_idle;
		1101
		1102	cctx_destroy (first);
		1103	}
		1104
		1105	++cctx_idle;
		1106	cctx->next = cctx_first;
		1107	cctx_first = cctx;
		1108	}
		1109
		1110	/** coroutine switching *****************************************************/
		1111
		1112	static void
		1113	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1114	{
		1115	if (expect_true (prev != next))
		1116	{
		1117	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1118	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1119
		1120	if (expect_false (next->flags & CF_RUNNING))
		1121	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1122
		1123	if (expect_false (next->flags & CF_DESTROYED))
		1124	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1125
		1126	if (
		1127	#if PERL_VERSION_ATLEAST (5,9,0)
		1128	expect_false (PL_parser)
661	#else	1129	#else
662		1130	expect_false (PL_lex_state != LEX_NOTPARSING)
663	stack->ssize = STACKSIZE * (long)sizeof (long);
664	New (0, stack->sptr, STACKSIZE, long);
665
666	if (!stack->sptr)
667	{
668	perror (stderr, "FATAL: unable to malloc stack for coroutine");
669	_exit (EXIT_FAILURE);
670	}
671
672	#endif	1131	#endif
673		1132	)
674	#if USE_VALGRIND	1133	croak ("Coro::State::transfer called while parsing, but this is not supported");
675	stack->valgrind_id = VALGRIND_STACK_REGISTER (
676	STACKGUARD * PAGESIZE + (char *)stack->sptr,
677	stack->ssize + (char *)stack->sptr
678	);
679	#endif
680
681	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683	return stack;
684	}
685
686	static void
687	stack_free (coro_stack *stack)
688	{
689	if (!stack)
690	return;
691
692	#if USE_VALGRIND
693	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
694	#endif
695
696	#if HAVE_MMAP
697	munmap (stack->sptr, stack->ssize);
698	#else
699	Safefree (stack->sptr);
700	#endif
701
702	Safefree (stack);
703	}
704
705	static coro_stack *stack_first;
706	static int cctx_count, cctx_idle;
707
708	static coro_stack *
709	stack_get ()
710	{
711	coro_stack *stack;
712
713	if (stack_first)
714	{
715	--cctx_idle;
716	stack = stack_first;
717	stack_first = stack->next;
718	}
719	else
720	{
721	++cctx_count;
722	stack = stack_new ();
723	PL_op = PL_op->op_next;
724	}	1134	}
725
726	return stack;
727	}	1135	}
728		1136
729	static void	1137	/* always use the TRANSFER macro */
730	stack_put (coro_stack *stack)
731	{
732	++cctx_idle;
733	stack->next = stack_first;
734	stack_first = stack;
735	}
736
737	/* never call directly, always through the coro_state_transfer global variable */
738	static void NOINLINE	1138	static void NOINLINE
739	transfer (struct coro *prev, struct coro *next, int flags)	1139	transfer (pTHX_ struct coro *prev, struct coro *next)
740	{	1140	{
741	dSTACKLEVEL;	1141	dSTACKLEVEL;
		1142	static volatile int has_throw;
742		1143
743	/* sometimes transfer is only called to set idle_sp */	1144	/* sometimes transfer is only called to set idle_sp */
744	if (flags == TRANSFER_SET_STACKLEVEL)	1145	if (expect_false (!next))
		1146	{
745	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1147	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746	else if (prev != next)	1148	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747	{	1149	}
		1150	else if (expect_true (prev != next))
		1151	{
748	coro_stack *prev__stack;	1152	coro_cctx *prev__cctx;
		1153
		1154	if (expect_false (prev->flags & CF_NEW))
		1155	{
		1156	/* create a new empty context */
		1157	Newz (0, prev->cctx, 1, coro_cctx);
		1158	prev->flags &= ~CF_NEW;
		1159	prev->flags |= CF_RUNNING;
		1160	}
		1161
		1162	prev->flags &= ~CF_RUNNING;
		1163	next->flags |= CF_RUNNING;
749		1164
750	LOCK;	1165	LOCK;
751		1166
752	if (next->mainstack)	1167	/* first get rid of the old state */
		1168	save_perl (aTHX_ prev);
		1169
		1170	if (expect_false (next->flags & CF_NEW))
753	{	1171	{
754	/* coroutine already started */	1172	/* need to start coroutine */
755	SAVE (prev, flags);	1173	next->flags &= ~CF_NEW;
756	LOAD (next);	1174	/* setup coroutine call */
		1175	coro_setup (aTHX_ next);
757	}	1176	}
758	else	1177	else
		1178	load_perl (aTHX_ next);
		1179
		1180	prev__cctx = prev->cctx;
		1181
		1182	/* possibly "free" the cctx */
		1183	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
759	{	1184	{
760	/* need to start coroutine */	1185	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
761	/* first get rid of the old state */	1186	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
762	SAVE (prev, -1);	1187
763	/* setup coroutine call */	1188	prev->cctx = 0;
764	setup_coro (next);	1189
765	/* need a stack */	1190	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
766	next->stack = 0;	1191	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1192	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1193	if (!next->cctx)
		1194	next->cctx = cctx_get (aTHX);
		1195
		1196	cctx_put (prev__cctx);
767	}	1197	}
768		1198
769	if (!prev->stack)	1199	++next->usecount;
770	/* create a new empty context */
771	Newz (0, prev->stack, 1, coro_stack);
772		1200
773	prev__stack = prev->stack;	1201	if (expect_true (!next->cctx))
		1202	next->cctx = cctx_get (aTHX);
774		1203
775	/* possibly "free" the stack */	1204	has_throw = !!next->throw;
776	if (prev__stack->idle_sp == STACKLEVEL)	1205
		1206	if (expect_false (prev__cctx != next->cctx))
777	{	1207	{
778	stack_put (prev__stack);	1208	prev__cctx->top_env = PL_top_env;
779	prev->stack = 0;	1209	PL_top_env = next->cctx->top_env;
		1210	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
780	}	1211	}
781		1212
782	if (!next->stack)	1213	free_coro_mortal (aTHX);
783	next->stack = stack_get ();	1214	UNLOCK;
784		1215
785	if (prev__stack != next->stack)	1216	if (expect_false (has_throw))
786	{	1217	{
787	prev__stack->top_env = PL_top_env;	1218	struct coro *coro = SvSTATE (coro_current);
788	PL_top_env = next->stack->top_env;	1219
789	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1220	if (coro->throw)
		1221	{
		1222	SV *exception = coro->throw;
		1223	coro->throw = 0;
		1224	sv_setsv (ERRSV, exception);
		1225	croak (0);
		1226	}
790	}	1227	}
		1228	}
		1229	}
791		1230
792	free_coro_mortal ();	1231	struct transfer_args
		1232	{
		1233	struct coro *prev, *next;
		1234	};
793		1235
		1236	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1237	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1238
		1239	/** high level stuff ********************************************************/
		1240
		1241	static int
		1242	coro_state_destroy (pTHX_ struct coro *coro)
		1243	{
		1244	if (coro->flags & CF_DESTROYED)
		1245	return 0;
		1246
		1247	coro->flags |= CF_DESTROYED;
		1248
		1249	if (coro->flags & CF_READY)
		1250	{
		1251	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1252	/* alternative: look through all ready queues and remove the coro */
		1253	LOCK;
		1254	--coro_nready;
794	UNLOCK;	1255	UNLOCK;
795	}	1256	}
796	}	1257	else
797		1258	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
798	struct transfer_args
799	{
800	struct coro *prev, *next;
801	int flags;
802	};
803
804	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
805
806	static void
807	coro_state_destroy (struct coro *coro)
808	{
809	if (coro->refcnt--)
810	return;
811		1259
812	if (coro->mainstack && coro->mainstack != main_mainstack)	1260	if (coro->mainstack && coro->mainstack != main_mainstack)
813	{	1261	{
814	struct coro temp;	1262	struct coro temp;
815		1263
816	SAVE ((&temp), TRANSFER_SAVE_ALL);	1264	if (coro->flags & CF_RUNNING)
817	LOAD (coro);	1265	croak ("FATAL: tried to destroy currently running coroutine");
818		1266
819	coro_destroy_stacks ();	1267	save_perl (aTHX_ &temp);
		1268	load_perl (aTHX_ coro);
820		1269
821	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1270	coro_destroy (aTHX_ coro);
822		1271
		1272	load_perl (aTHX_ &temp);
		1273
823	coro->mainstack = 0;	1274	coro->slot = 0;
824	}	1275	}
825		1276
826	stack_free (coro->stack);	1277	cctx_destroy (coro->cctx);
827	SvREFCNT_dec (coro->args);	1278	SvREFCNT_dec (coro->args);
828	Safefree (coro);	1279
		1280	if (coro->next) coro->next->prev = coro->prev;
		1281	if (coro->prev) coro->prev->next = coro->next;
		1282	if (coro == coro_first) coro_first = coro->next;
		1283
		1284	return 1;
829	}	1285	}
830		1286
831	static int	1287	static int
832	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1288	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833	{	1289	{
834	struct coro *coro = (struct coro *)mg->mg_ptr;	1290	struct coro *coro = (struct coro *)mg->mg_ptr;
835	mg->mg_ptr = 0;	1291	mg->mg_ptr = 0;
836		1292
		1293	coro->hv = 0;
		1294
		1295	if (--coro->refcnt < 0)
		1296	{
837	coro_state_destroy (coro);	1297	coro_state_destroy (aTHX_ coro);
		1298	Safefree (coro);
		1299	}
838		1300
839	return 0;	1301	return 0;
840	}	1302	}
841		1303
842	static int	1304	static int
…		…
849	return 0;	1311	return 0;
850	}	1312	}
851		1313
852	static MGVTBL coro_state_vtbl = {	1314	static MGVTBL coro_state_vtbl = {
853	0, 0, 0, 0,	1315	0, 0, 0, 0,
854	coro_state_clear,	1316	coro_state_free,
855	0,	1317	0,
856	#ifdef MGf_DUP	1318	#ifdef MGf_DUP
857	coro_state_dup,	1319	coro_state_dup,
858	#else	1320	#else
859	# define MGf_DUP 0	1321	# define MGf_DUP 0
860	#endif	1322	#endif
861	};	1323	};
862		1324
863	static struct coro *
864	SvSTATE (SV *coro)
865	{
866	HV *stash;
867	MAGIC *mg;
868
869	if (SvROK (coro))
870	coro = SvRV (coro);
871
872	stash = SvSTASH (coro);
873	if (stash != coro_stash && stash != coro_state_stash)
874	{
875	/* very slow, but rare, check */
876	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
877	croak ("Coro::State object required");
878	}
879
880	mg = SvMAGIC (coro);
881	assert (mg->mg_type == PERL_MAGIC_ext);
882	return (struct coro *)mg->mg_ptr;
883	}
884
885	static void	1325	static void
886	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1326	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
887	{	1327	{
888	ta->prev = SvSTATE (prev);	1328	ta->prev = SvSTATE (prev_sv);
889	ta->next = SvSTATE (next);	1329	ta->next = SvSTATE (next_sv);
890	ta->flags = flags;	1330	TRANSFER_CHECK (*ta);
891	}	1331	}
892		1332
893	static void	1333	static void
894	api_transfer (SV *prev, SV *next, int flags)	1334	api_transfer (SV *prev_sv, SV *next_sv)
895	{	1335	{
896	dTHX;	1336	dTHX;
897	struct transfer_args ta;	1337	struct transfer_args ta;
898		1338
899	prepare_transfer (&ta, prev, next, flags);	1339	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900	TRANSFER (ta);	1340	TRANSFER (ta);
901	}	1341	}
902		1342
903	/** Coro ********************************************************************/	1343	/** Coro ********************************************************************/
904		1344
905	#define PRIO_MAX 3
906	#define PRIO_HIGH 1
907	#define PRIO_NORMAL 0
908	#define PRIO_LOW -1
909	#define PRIO_IDLE -3
910	#define PRIO_MIN -4
911
912	/* for Coro.pm */
913	static GV *coro_current, *coro_idle;
914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915	static int coro_nready;
916
917	static void	1345	static void
918	coro_enq (SV *sv)	1346	coro_enq (pTHX_ SV *coro_sv)
		1347	{
		1348	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1349	}
		1350
		1351	static SV *
		1352	coro_deq (pTHX)
919	{	1353	{
920	int prio;	1354	int prio;
921		1355
922	if (SvTYPE (sv) != SVt_PVHV)
923	croak ("Coro::ready tried to enqueue something that is not a coroutine");
924
925	prio = SvSTATE (sv)->prio;
926
927	av_push (coro_ready [prio - PRIO_MIN], sv);
928	coro_nready++;
929	}
930
931	static SV *
932	coro_deq (int min_prio)
933	{
934	int prio = PRIO_MAX - PRIO_MIN;
935
936	min_prio -= PRIO_MIN;
937	if (min_prio < 0)
938	min_prio = 0;
939
940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1356	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
941	if (AvFILLp (coro_ready [prio]) >= 0)	1357	if (AvFILLp (coro_ready [prio]) >= 0)
942	{
943	coro_nready--;
944	return av_shift (coro_ready [prio]);	1358	return av_shift (coro_ready [prio]);
945	}
946		1359
947	return 0;	1360	return 0;
948	}	1361	}
949		1362
		1363	static int
		1364	api_ready (SV *coro_sv)
		1365	{
		1366	dTHX;
		1367	struct coro *coro;
		1368
		1369	if (SvROK (coro_sv))
		1370	coro_sv = SvRV (coro_sv);
		1371
		1372	coro = SvSTATE (coro_sv);
		1373
		1374	if (coro->flags & CF_READY)
		1375	return 0;
		1376
		1377	coro->flags |= CF_READY;
		1378
		1379	LOCK;
		1380	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1381	++coro_nready;
		1382	UNLOCK;
		1383
		1384	return 1;
		1385	}
		1386
		1387	static int
		1388	api_is_ready (SV *coro_sv)
		1389	{
		1390	dTHX;
		1391	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1392	}
		1393
950	static void	1394	static void
951	api_ready (SV *coro)	1395	prepare_schedule (pTHX_ struct transfer_args *ta)
952	{	1396	{
953	dTHX;	1397	SV *prev_sv, *next_sv;
954		1398
955	if (SvROK (coro))	1399	for (;;)
956	coro = SvRV (coro);	1400	{
		1401	LOCK;
		1402	next_sv = coro_deq (aTHX);
		1403
		1404	/* nothing to schedule: call the idle handler */
		1405	if (expect_false (!next_sv))
		1406	{
		1407	dSP;
		1408	UNLOCK;
		1409
		1410	ENTER;
		1411	SAVETMPS;
		1412
		1413	PUSHMARK (SP);
		1414	PUTBACK;
		1415	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1416	SPAGAIN;
		1417
		1418	FREETMPS;
		1419	LEAVE;
		1420	continue;
		1421	}
		1422
		1423	ta->next = SvSTATE (next_sv);
		1424
		1425	/* cannot transfer to destroyed coros, skip and look for next */
		1426	if (expect_false (ta->next->flags & CF_DESTROYED))
		1427	{
		1428	UNLOCK;
		1429	SvREFCNT_dec (next_sv);
		1430	/* coro_nready is already taken care of by destroy */
		1431	continue;
		1432	}
		1433
		1434	--coro_nready;
		1435	UNLOCK;
		1436	break;
		1437	}
		1438
		1439	/* free this only after the transfer */
		1440	prev_sv = SvRV (coro_current);
		1441	ta->prev = SvSTATE (prev_sv);
		1442	TRANSFER_CHECK (*ta);
		1443	assert (ta->next->flags & CF_READY);
		1444	ta->next->flags &= ~CF_READY;
		1445	SvRV_set (coro_current, next_sv);
957		1446
958	LOCK;	1447	LOCK;
959	coro_enq (SvREFCNT_inc (coro));	1448	free_coro_mortal (aTHX);
		1449	coro_mortal = prev_sv;
960	UNLOCK;	1450	UNLOCK;
961	}	1451	}
962		1452
963	static void	1453	static void
964	prepare_schedule (struct transfer_args *ta)
965	{
966	SV *current, *prev, *next;
967
968	current = GvSV (coro_current);
969
970	for (;;)
971	{
972	LOCK;
973	next = coro_deq (PRIO_MIN);
974	UNLOCK;
975
976	if (next)
977	break;
978
979	{
980	dSP;
981
982	ENTER;
983	SAVETMPS;
984
985	PUSHMARK (SP);
986	PUTBACK;
987	call_sv (GvSV (coro_idle), G_DISCARD);
988
989	FREETMPS;
990	LEAVE;
991	}
992	}
993
994	prev = SvRV (current);
995	SvRV (current) = next;
996
997	/* free this only after the transfer */
998	LOCK;
999	free_coro_mortal ();
1000	UNLOCK;
1001	coro_mortal = prev;
1002
1003	ta->prev = SvSTATE (prev);
1004	ta->next = SvSTATE (next);
1005	ta->flags = TRANSFER_SAVE_ALL;
1006	}
1007
1008	static void
1009	prepare_cede (struct transfer_args *ta)	1454	prepare_cede (pTHX_ struct transfer_args *ta)
1010	{	1455	{
1011	LOCK;	1456	api_ready (coro_current);
1012	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013	UNLOCK;
1014
1015	prepare_schedule (ta);	1457	prepare_schedule (aTHX_ ta);
		1458	}
		1459
		1460	static int
		1461	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1462	{
		1463	if (coro_nready)
		1464	{
		1465	SV *prev = SvRV (coro_current);
		1466	prepare_schedule (aTHX_ ta);
		1467	api_ready (prev);
		1468	return 1;
		1469	}
		1470	else
		1471	return 0;
1016	}	1472	}
1017		1473
1018	static void	1474	static void
1019	api_schedule (void)	1475	api_schedule (void)
1020	{	1476	{
1021	dTHX;	1477	dTHX;
1022	struct transfer_args ta;	1478	struct transfer_args ta;
1023		1479
1024	prepare_schedule (&ta);	1480	prepare_schedule (aTHX_ &ta);
1025	TRANSFER (ta);	1481	TRANSFER (ta);
1026	}	1482	}
1027		1483
1028	static void	1484	static int
1029	api_cede (void)	1485	api_cede (void)
1030	{	1486	{
1031	dTHX;	1487	dTHX;
1032	struct transfer_args ta;	1488	struct transfer_args ta;
1033		1489
1034	prepare_cede (&ta);	1490	prepare_cede (aTHX_ &ta);
		1491
		1492	if (expect_true (ta.prev != ta.next))
		1493	{
1035	TRANSFER (ta);	1494	TRANSFER (ta);
		1495	return 1;
		1496	}
		1497	else
		1498	return 0;
1036	}	1499	}
1037		1500
		1501	static int
		1502	api_cede_notself (void)
		1503	{
		1504	dTHX;
		1505	struct transfer_args ta;
		1506
		1507	if (prepare_cede_notself (aTHX_ &ta))
		1508	{
		1509	TRANSFER (ta);
		1510	return 1;
		1511	}
		1512	else
		1513	return 0;
		1514	}
		1515
		1516	static void
		1517	api_trace (SV *coro_sv, int flags)
		1518	{
		1519	dTHX;
		1520	struct coro *coro = SvSTATE (coro_sv);
		1521
		1522	if (flags & CC_TRACE)
		1523	{
		1524	if (!coro->cctx)
		1525	coro->cctx = cctx_new ();
		1526	else if (!(coro->cctx->flags & CC_TRACE))
		1527	croak ("cannot enable tracing on coroutine with custom stack");
		1528
		1529	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1530	}
		1531	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1532	{
		1533	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1534
		1535	if (coro->flags & CF_RUNNING)
		1536	PL_runops = RUNOPS_DEFAULT;
		1537	else
		1538	coro->slot->runops = RUNOPS_DEFAULT;
		1539	}
		1540	}
		1541
1038	MODULE = Coro::State PACKAGE = Coro::State	1542	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039		1543
1040	PROTOTYPES: DISABLE	1544	PROTOTYPES: DISABLE
1041		1545
1042	BOOT:	1546	BOOT:
1043	{	1547	{
1044	#ifdef USE_ITHREADS	1548	#ifdef USE_ITHREADS
1045	MUTEX_INIT (&coro_mutex);	1549	MUTEX_INIT (&coro_mutex);
1046	#endif	1550	#endif
1047	BOOT_PAGESIZE;	1551	BOOT_PAGESIZE;
1048		1552
		1553	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1554	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1555
		1556	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1557	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1558	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1559	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1560
		1561	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1562	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1563	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1564
1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1565	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050		1566
1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1567	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1568	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1569	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1570	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054		1571
1055	main_mainstack = PL_mainstack;	1572	main_mainstack = PL_mainstack;
		1573	main_top_env = PL_top_env;
		1574
		1575	while (main_top_env->je_prev)
		1576	main_top_env = main_top_env->je_prev;
1056		1577
1057	coroapi.ver = CORO_API_VERSION;	1578	coroapi.ver = CORO_API_VERSION;
		1579	coroapi.rev = CORO_API_REVISION;
1058	coroapi.transfer = api_transfer;	1580	coroapi.transfer = api_transfer;
1059		1581
1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1582	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1061	}	1583	}
1062		1584
1063	SV *	1585	SV *
1064	new (char *klass, ...)	1586	new (char *klass, ...)
1065	CODE:	1587	CODE:
1066	{	1588	{
1067	struct coro *coro;	1589	struct coro *coro;
		1590	MAGIC *mg;
1068	HV *hv;	1591	HV *hv;
1069	int i;	1592	int i;
1070		1593
1071	Newz (0, coro, 1, struct coro);	1594	Newz (0, coro, 1, struct coro);
1072	coro->args = newAV ();	1595	coro->args = newAV ();
		1596	coro->flags = CF_NEW;
1073		1597
		1598	if (coro_first) coro_first->prev = coro;
		1599	coro->next = coro_first;
		1600	coro_first = coro;
		1601
1074	hv = newHV ();	1602	coro->hv = hv = newHV ();
1075	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1603	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1604	mg->mg_flags |= MGf_DUP;
1076	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1605	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077		1606
		1607	av_extend (coro->args, items - 1);
1078	for (i = 1; i < items; i++)	1608	for (i = 1; i < items; i++)
1079	av_push (coro->args, newSVsv (ST (i)));	1609	av_push (coro->args, newSVsv (ST (i)));
1080
1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1082	/*coro->stack = 0;*/
1083	}	1610	}
1084	OUTPUT:	1611	OUTPUT:
1085	RETVAL	1612	RETVAL
1086		1613
		1614	# these not obviously related functions are all rolled into the same xs
		1615	# function to increase chances that they all will call transfer with the same
		1616	# stack offset
1087	void	1617	void
1088	_set_stacklevel (...)	1618	_set_stacklevel (...)
1089	ALIAS:	1619	ALIAS:
1090	Coro::State::transfer = 1	1620	Coro::State::transfer = 1
1091	Coro::schedule = 2	1621	Coro::schedule = 2
1092	Coro::cede = 3	1622	Coro::cede = 3
1093	Coro::Cont::yield = 4	1623	Coro::cede_notself = 4
1094	CODE:	1624	CODE:
1095	{	1625	{
1096	struct transfer_args ta;	1626	struct transfer_args ta;
1097		1627
		1628	PUTBACK;
1098	switch (ix)	1629	switch (ix)
1099	{	1630	{
1100	case 0:	1631	case 0:
1101	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1632	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102	ta.next = 0;	1633	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1634	break;
1105		1635
1106	case 1:	1636	case 1:
1107	if (items != 3)	1637	if (items != 2)
1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1638	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109		1639
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1640	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111	break;	1641	break;
1112		1642
1113	case 2:	1643	case 2:
1114	prepare_schedule (&ta);	1644	prepare_schedule (aTHX_ &ta);
1115	break;	1645	break;
1116		1646
1117	case 3:	1647	case 3:
1118	prepare_cede (&ta);	1648	prepare_cede (aTHX_ &ta);
1119	break;	1649	break;
1120		1650
1121	case 4:	1651	case 4:
1122	{	1652	if (!prepare_cede_notself (aTHX_ &ta))
1123	SV *yieldstack;	1653	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1654
1127	yieldstack = *hv_fetch (
1128	(HV *)SvRV (GvSV (coro_current)),
1129	"yieldstack", sizeof ("yieldstack") - 1,
1130	0
1131	);
1132
1133	/* set up @_ -- ugly */
1134	av_clear (defav);
1135	av_fill (defav, items - 1);
1136	while (items--)
1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139	sv = av_pop ((AV *)SvRV (yieldstack));
1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142	ta.flags = 0;
1143	SvREFCNT_dec (sv);
1144	}
1145	break;	1655	break;
1146
1147	}	1656	}
		1657	SPAGAIN;
1148		1658
		1659	BARRIER;
		1660	PUTBACK;
1149	TRANSFER (ta);	1661	TRANSFER (ta);
		1662	SPAGAIN; /* might be the sp of a different coroutine now */
		1663	/* be extra careful not to ever do anything after TRANSFER */
1150	}	1664	}
1151		1665
1152	void	1666	bool
1153	_clone_state_from (SV *dst, SV *src)	1667	_destroy (SV *coro_sv)
1154	CODE:	1668	CODE:
1155	{	1669	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1670	OUTPUT:
1157		1671	RETVAL
1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160	++coro_src->refcnt;
1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162	}
1163		1672
1164	void	1673	void
1165	_exit (code)	1674	_exit (code)
1166	int code	1675	int code
1167	PROTOTYPE: $	1676	PROTOTYPE: $
1168	CODE:	1677	CODE:
1169	_exit (code);	1678	_exit (code);
1170		1679
		1680	int
		1681	cctx_stacksize (int new_stacksize = 0)
		1682	CODE:
		1683	RETVAL = coro_stacksize;
		1684	if (new_stacksize)
		1685	coro_stacksize = new_stacksize;
		1686	OUTPUT:
		1687	RETVAL
		1688
		1689	int
		1690	cctx_count ()
		1691	CODE:
		1692	RETVAL = cctx_count;
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	int
		1697	cctx_idle ()
		1698	CODE:
		1699	RETVAL = cctx_idle;
		1700	OUTPUT:
		1701	RETVAL
		1702
		1703	void
		1704	list ()
		1705	PPCODE:
		1706	{
		1707	struct coro *coro;
		1708	for (coro = coro_first; coro; coro = coro->next)
		1709	if (coro->hv)
		1710	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1711	}
		1712
		1713	void
		1714	call (Coro::State coro, SV *coderef)
		1715	ALIAS:
		1716	eval = 1
		1717	CODE:
		1718	{
		1719	if (coro->mainstack)
		1720	{
		1721	struct coro temp;
		1722
		1723	if (!(coro->flags & CF_RUNNING))
		1724	{
		1725	PUTBACK;
		1726	save_perl (aTHX_ &temp);
		1727	load_perl (aTHX_ coro);
		1728	}
		1729
		1730	{
		1731	dSP;
		1732	ENTER;
		1733	SAVETMPS;
		1734	PUTBACK;
		1735	PUSHSTACK;
		1736	PUSHMARK (SP);
		1737
		1738	if (ix)
		1739	eval_sv (coderef, 0);
		1740	else
		1741	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1742
		1743	POPSTACK;
		1744	SPAGAIN;
		1745	FREETMPS;
		1746	LEAVE;
		1747	PUTBACK;
		1748	}
		1749
		1750	if (!(coro->flags & CF_RUNNING))
		1751	{
		1752	save_perl (aTHX_ coro);
		1753	load_perl (aTHX_ &temp);
		1754	SPAGAIN;
		1755	}
		1756	}
		1757	}
		1758
		1759	SV *
		1760	is_ready (Coro::State coro)
		1761	PROTOTYPE: $
		1762	ALIAS:
		1763	is_ready = CF_READY
		1764	is_running = CF_RUNNING
		1765	is_new = CF_NEW
		1766	is_destroyed = CF_DESTROYED
		1767	CODE:
		1768	RETVAL = boolSV (coro->flags & ix);
		1769	OUTPUT:
		1770	RETVAL
		1771
		1772	void
		1773	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1774
		1775	SV *
		1776	has_stack (Coro::State coro)
		1777	PROTOTYPE: $
		1778	CODE:
		1779	RETVAL = boolSV (!!coro->cctx);
		1780	OUTPUT:
		1781	RETVAL
		1782
		1783	int
		1784	is_traced (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	IV
		1792	rss (Coro::State coro)
		1793	PROTOTYPE: $
		1794	ALIAS:
		1795	usecount = 1
		1796	CODE:
		1797	switch (ix)
		1798	{
		1799	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1800	case 1: RETVAL = coro->usecount; break;
		1801	}
		1802	OUTPUT:
		1803	RETVAL
		1804
		1805
1171	MODULE = Coro::State PACKAGE = Coro	1806	MODULE = Coro::State PACKAGE = Coro
1172		1807
1173	BOOT:	1808	BOOT:
1174	{	1809	{
1175	int i;	1810	int i;
1176		1811
		1812	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1813	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1814	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1815
		1816	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1817	SvREADONLY_on (coro_current);
		1818
1177	coro_stash = gv_stashpv ("Coro", TRUE);	1819	coro_stash = gv_stashpv ("Coro", TRUE);
1178		1820
1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1821	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1822	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1823	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1824	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1825	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1826	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185		1827
1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1188
1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1828	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190	coro_ready[i] = newAV ();	1829	coro_ready[i] = newAV ();
1191		1830
1192	{	1831	{
1193	SV *sv = perl_get_sv("Coro::API", 1);	1832	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1833	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194		1834
1195	coroapi.schedule = api_schedule;	1835	coroapi.schedule = api_schedule;
1196	coroapi.cede = api_cede;	1836	coroapi.cede = api_cede;
		1837	coroapi.cede_notself = api_cede_notself;
1197	coroapi.ready = api_ready;	1838	coroapi.ready = api_ready;
		1839	coroapi.is_ready = api_is_ready;
1198	coroapi.nready = &coro_nready;	1840	coroapi.nready = &coro_nready;
1199	coroapi.current = coro_current;	1841	coroapi.current = coro_current;
1200		1842
1201	GCoroAPI = &coroapi;	1843	GCoroAPI = &coroapi;
1202	sv_setiv (sv, (IV)&coroapi);	1844	sv_setiv (sv, (IV)&coroapi);
1203	SvREADONLY_on (sv);	1845	SvREADONLY_on (sv);
1204	}	1846	}
1205	}	1847	}
		1848
		1849	void
		1850	_set_current (SV *current)
		1851	PROTOTYPE: $
		1852	CODE:
		1853	SvREFCNT_dec (SvRV (coro_current));
		1854	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1206		1855
1207	int	1856	int
1208	prio (Coro::State coro, int newprio = 0)	1857	prio (Coro::State coro, int newprio = 0)
1209	ALIAS:	1858	ALIAS:
1210	nice = 1	1859	nice = 1
…		…
1213	RETVAL = coro->prio;	1862	RETVAL = coro->prio;
1214		1863
1215	if (items > 1)	1864	if (items > 1)
1216	{	1865	{
1217	if (ix)	1866	if (ix)
1218	newprio += coro->prio;	1867	newprio = coro->prio - newprio;
1219		1868
1220	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1869	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1870	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222		1871
1223	coro->prio = newprio;	1872	coro->prio = newprio;
1224	}	1873	}
1225	}	1874	}
		1875	OUTPUT:
		1876	RETVAL
1226		1877
1227	void	1878	SV *
1228	ready (SV *self)	1879	ready (SV *self)
1229	PROTOTYPE: $	1880	PROTOTYPE: $
1230	CODE:	1881	CODE:
1231	api_ready (self);	1882	RETVAL = boolSV (api_ready (self));
		1883	OUTPUT:
		1884	RETVAL
1232		1885
1233	int	1886	int
1234	nready (...)	1887	nready (...)
1235	PROTOTYPE:	1888	PROTOTYPE:
1236	CODE:	1889	CODE:
1237	RETVAL = coro_nready;	1890	RETVAL = coro_nready;
1238	OUTPUT:	1891	OUTPUT:
1239	RETVAL	1892	RETVAL
1240		1893
		1894	void
		1895	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1896	PROTOTYPE: $;$
		1897	CODE:
		1898	SvREFCNT_dec (self->throw);
		1899	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1900
		1901	# for async_pool speedup
		1902	void
		1903	_pool_1 (SV *cb)
		1904	CODE:
		1905	{
		1906	struct coro *coro = SvSTATE (coro_current);
		1907	HV *hv = (HV *)SvRV (coro_current);
		1908	AV *defav = GvAV (PL_defgv);
		1909	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1910	AV *invoke_av;
		1911	int i, len;
		1912
		1913	if (!invoke)
		1914	{
		1915	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1916	croak ("\3async_pool terminate\2\n");
		1917	}
		1918
		1919	SvREFCNT_dec (coro->saved_deffh);
		1920	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1921
		1922	hv_store (hv, "desc", sizeof ("desc") - 1,
		1923	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1924
		1925	invoke_av = (AV *)SvRV (invoke);
		1926	len = av_len (invoke_av);
		1927
		1928	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1929
		1930	if (len > 0)
		1931	{
		1932	av_fill (defav, len - 1);
		1933	for (i = 0; i < len; ++i)
		1934	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1935	}
		1936
		1937	SvREFCNT_dec (invoke);
		1938	}
		1939
		1940	void
		1941	_pool_2 (SV *cb)
		1942	CODE:
		1943	{
		1944	struct coro *coro = SvSTATE (coro_current);
		1945
		1946	sv_setsv (cb, &PL_sv_undef);
		1947
		1948	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1949	coro->saved_deffh = 0;
		1950
		1951	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1952	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1953	{
		1954	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1955	croak ("\3async_pool terminate\2\n");
		1956	}
		1957
		1958	av_clear (GvAV (PL_defgv));
		1959	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1961
		1962	coro->prio = 0;
		1963
		1964	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1965	api_trace (coro_current, 0);
		1966
		1967	av_push (av_async_pool, newSVsv (coro_current));
		1968	}
		1969
		1970
1241	MODULE = Coro::State PACKAGE = Coro::AIO	1971	MODULE = Coro::State PACKAGE = Coro::AIO
1242		1972
1243	SV *	1973	SV *
1244	_get_state ()	1974	_get_state ()
1245	CODE:	1975	CODE:
1246	{	1976	{
1247	struct {	1977	struct io_state *data;
1248	int errorno;
1249	int laststype;
1250	int laststatval;
1251	Stat_t statcache;
1252	} data;
1253		1978
		1979	RETVAL = newSV (sizeof (struct io_state));
		1980	data = (struct io_state *)SvPVX (RETVAL);
		1981	SvCUR_set (RETVAL, sizeof (struct io_state));
		1982	SvPOK_only (RETVAL);
		1983
1254	data.errorno = errno;	1984	data->errorno = errno;
1255	data.laststype = PL_laststype;	1985	data->laststype = PL_laststype;
1256	data.laststatval = PL_laststatval;	1986	data->laststatval = PL_laststatval;
1257	data.statcache = PL_statcache;	1987	data->statcache = PL_statcache;
1258
1259	RETVAL = newSVpvn ((char *)&data, sizeof data);
1260	}	1988	}
1261	OUTPUT:	1989	OUTPUT:
1262	RETVAL	1990	RETVAL
1263		1991
1264	void	1992	void
1265	_set_state (char *data_)	1993	_set_state (char *data_)
1266	PROTOTYPE: $	1994	PROTOTYPE: $
1267	CODE:	1995	CODE:
1268	{	1996	{
1269	struct {	1997	struct io_state *data = (void *)data_;
1270	int errorno;
1271	int laststype;
1272	int laststatval;
1273	Stat_t statcache;
1274	} *data = (void *)data_;
1275		1998
1276	errno = data->errorno;	1999	errno = data->errorno;
1277	PL_laststype = data->laststype;	2000	PL_laststype = data->laststype;
1278	PL_laststatval = data->laststatval;	2001	PL_laststatval = data->laststatval;
1279	PL_statcache = data->statcache;	2002	PL_statcache = data->statcache;
1280	}	2003	}
		2004

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