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Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.210 by root, Wed Oct 10 03:24:40 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#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)
12	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
14	# endif	59	# endif
15	# ifndef call_sv	60	# ifndef call_sv
16	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
29	# endif	74	# endif
30	#endif	75	#endif
31		76
32	#include <stdio.h>	77	/* 5.8.7 */
33	#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
34		89
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	91	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	92	#endif
53	# include <limits.h>	93
54	# ifndef PAGESIZE	94	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	95	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	96	#endif
61	#endif
62		97
63	/* The next macro should declare a variable stacklevel that contains and approximation	98	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* 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. */
66	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
68		107
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		109
		110	#if __GNUC__ >= 3
		111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
		114	#else
		115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
		118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
		122
		123	#define NOINLINE attribute ((noinline))
		124
71	#include "CoroAPI.h"	125	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		126
75	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	131	#else
80	# define LOCK (void)0	132	# define LOCK (void)0
81	# define UNLOCK (void)0	133	# define UNLOCK (void)0
82	#endif	134	#endif
83		135
		136	#define strpair(const) const, sizeof (const) - 1
		137
		138	/* helper storage struct for Coro::AIO */
		139	struct io_state
		140	{
		141	int errorno;
		142	I32 laststype;
		143	int laststatval;
		144	Stat_t statcache;
		145	};
		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	148	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	149	static AV *main_mainstack; /* used to differentiate between $main and others */
		150	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	151	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	152	static SV *coro_mortal; /* will be freed after next transfer */
88		153
		154	static GV *irsgv; /* $/ */
		155	static GV *stdoutgv; /* *STDOUT */
		156
		157	static HV *hv_sig; /* %SIG */
		158	static SV *sv_diehook;
		159	static SV *sv_warnhook;
		160
		161	/* async_pool helper stuff */
		162	static SV *sv_pool_rss;
		163	static SV *sv_pool_size;
		164	static AV *av_async_pool;
		165
		166	static struct coro_cctx *cctx_first[3]; /* index by GIMME_V type, void, scalar, array */
		167	static int cctx_count, cctx_idle[3];
		168
		169	enum {
		170	CC_MAPPED = 0x01,
		171	CC_NOREUSE = 0x02, /* throw this away after tracing */
		172	CC_TRACE = 0x04,
		173	CC_TRACE_SUB = 0x08, /* trace sub calls */
		174	CC_TRACE_LINE = 0x10, /* trace each statement */
		175	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		176	};
		177
89	/* this is a structure representing a c-level coroutine */	178	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	179	typedef struct coro_cctx {
91	struct coro_stack *next;	180	struct coro_cctx *next;
92		181
93	/* the stack */	182	/* the stack */
94	void *sptr;	183	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	184	size_t ssize;
96		185
97	/* cpu state */	186	/* cpu state */
98	void *idle_sp; /* original stacklevel when coroutine was created */	187	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		188	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	189	JMPENV *top_env;
100	coro_context cctx;	190	coro_context cctx;
101	} coro_stack;
102		191
103	/* the (fake) coro_stack representing the main program */	192	#if CORO_USE_VALGRIND
104	static coro_stack *main_stack;	193	int valgrind_id;
		194	#endif
		195	unsigned char flags;
		196	} coro_cctx;
		197
		198	enum {
		199	CF_RUNNING = 0x0001, /* coroutine is running */
		200	CF_READY = 0x0002, /* coroutine is ready */
		201	CF_NEW = 0x0004, /* has never been switched to */
		202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		203	};
		204
		205	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		206	typedef struct {
		207	SV *defsv;
		208	AV *defav;
		209	SV *errsv;
		210	SV *irsgv;
		211	#define VAR(name,type) type name;
		212	# include "state.h"
		213	#undef VAR
		214	} perl_slots;
		215
		216	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
105		217
106	/* this is a structure representing a perl-level coroutine */	218	/* this is a structure representing a perl-level coroutine */
107	struct coro {	219	struct coro {
108	/* the c coroutine allocated to this perl coroutine, if any */	220	/* the c coroutine allocated to this perl coroutine, if any */
109	coro_stack *stack;	221	coro_cctx *cctx;
		222	int gimme;
110		223
111	/* data associated with this coroutine (initial args) */	224	/* process data */
112	AV *args;
113	int refcnt;
114
115	/* optionally saved, might be zero */
116	AV *defav;
117	SV *defsv;
118	SV *errsv;
119
120	/* saved global state not related to stacks */
121	U8 dowarn;
122	I32 in_eval;
123
124	/* the stacks and related info (callchain etc..) */
125	PERL_SI *curstackinfo;
126	AV *curstack;
127	AV *mainstack;	225	AV *mainstack;
128	SV **stack_sp;	226	perl_slots *slot; /* basically the saved sp */
129	OP *op;	227
130	SV **curpad;	228	AV *args; /* data associated with this coroutine (initial args) */
131	AV *comppad;	229	int refcnt; /* coroutines are refcounted, yes */
132	CV *compcv;	230	int flags; /* CF_ flags */
133	SV **stack_base;	231	HV *hv; /* the perl hash associated with this coro, if any */
134	SV **stack_max;	232
135	SV **tmps_stack;	233	/* statistics */
136	I32 tmps_floor;	234	int usecount; /* number of transfers to this coro */
137	I32 tmps_ix;
138	I32 tmps_max;
139	I32 *markstack;
140	I32 *markstack_ptr;
141	I32 *markstack_max;
142	I32 *scopestack;
143	I32 scopestack_ix;
144	I32 scopestack_max;
145	ANY *savestack;
146	I32 savestack_ix;
147	I32 savestack_max;
148	OP **retstack;
149	I32 retstack_ix;
150	I32 retstack_max;
151	PMOP *curpm;
152	COP *curcop;
153		235
154	/* coro process data */	236	/* coro process data */
155	int prio;	237	int prio;
		238	SV *throw; /* exception to be thrown */
		239
		240	/* async_pool */
		241	SV *saved_deffh;
		242
		243	/* linked list */
		244	struct coro *next, *prev;
156	};	245	};
157		246
158	typedef struct coro *Coro__State;	247	typedef struct coro *Coro__State;
159	typedef struct coro *Coro__State_or_hashref;	248	typedef struct coro *Coro__State_or_hashref;
160		249
		250	/** Coro ********************************************************************/
		251
		252	#define PRIO_MAX 3
		253	#define PRIO_HIGH 1
		254	#define PRIO_NORMAL 0
		255	#define PRIO_LOW -1
		256	#define PRIO_IDLE -3
		257	#define PRIO_MIN -4
		258
		259	/* for Coro.pm */
		260	static SV *coro_current;
		261	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		262	static int coro_nready;
		263	static struct coro *coro_first;
		264
		265	/** lowlevel stuff **********************************************************/
		266
		267	static SV *
		268	coro_get_sv (const char *name, int create)
		269	{
		270	#if PERL_VERSION_ATLEAST (5,9,0)
		271	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		272	get_sv (name, create);
		273	#endif
		274	return get_sv (name, create);
		275	}
		276
		277	static AV *
		278	coro_get_av (const char *name, int create)
		279	{
		280	#if PERL_VERSION_ATLEAST (5,9,0)
		281	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		282	get_av (name, create);
		283	#endif
		284	return get_av (name, create);
		285	}
		286
		287	static HV *
		288	coro_get_hv (const char *name, int create)
		289	{
		290	#if PERL_VERSION_ATLEAST (5,9,0)
		291	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		292	get_hv (name, create);
		293	#endif
		294	return get_hv (name, create);
		295	}
		296
161	static AV *	297	static AV *
162	coro_clone_padlist (pTHX_ CV *cv)	298	coro_clone_padlist (pTHX_ CV *cv)
163	{	299	{
164	AV *padlist = CvPADLIST (cv);	300	AV *padlist = CvPADLIST (cv);
165	AV *newpadlist, *newpad;	301	AV *newpadlist, *newpad;
166		302
167	newpadlist = newAV ();	303	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	304	AvREAL_off (newpadlist);
169	#if PERL_VERSION < 9	305	#if PERL_VERSION_ATLEAST (5,9,0)
		306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		307	#else
170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	308	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173	#endif	309	#endif
174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	310	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175	--AvFILLp (padlist);	311	--AvFILLp (padlist);
176		312
177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	313	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
221		357
222	#define PERL_MAGIC_coro PERL_MAGIC_ext	358	#define PERL_MAGIC_coro PERL_MAGIC_ext
223		359
224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225		361
		362	#define CORO_MAGIC(cv) \
		363	SvMAGIC (cv) \
		364	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		365	? SvMAGIC (cv) \
		366	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		367	: 0
		368
		369	static struct coro *
		370	SvSTATE_ (pTHX_ SV *coro)
		371	{
		372	HV *stash;
		373	MAGIC *mg;
		374
		375	if (SvROK (coro))
		376	coro = SvRV (coro);
		377
		378	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		379	croak ("Coro::State object required");
		380
		381	stash = SvSTASH (coro);
		382	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		383	{
		384	/* very slow, but rare, check */
		385	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		386	croak ("Coro::State object required");
		387	}
		388
		389	mg = CORO_MAGIC (coro);
		390	return (struct coro *)mg->mg_ptr;
		391	}
		392
		393	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		394
226	/* the next two functions merely cache the padlists */	395	/* the next two functions merely cache the padlists */
227	static void	396	static void
228	get_padlist (pTHX_ CV *cv)	397	get_padlist (pTHX_ CV *cv)
229	{	398	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	399	MAGIC *mg = CORO_MAGIC (cv);
		400	AV *av;
231		401
232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	402	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	403	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234	else	404	else
235	{	405	{
236	#if 0	406	#if CORO_PREFER_PERL_FUNCTIONS
237	/* this should work - but it doesn't :( */	407	/* this is probably cleaner, but also slower? */
238	CV *cp = Perl_cv_clone (aTHX_ cv);	408	CV *cp = Perl_cv_clone (cv);
239	CvPADLIST (cv) = CvPADLIST (cp);	409	CvPADLIST (cv) = CvPADLIST (cp);
240	CvPADLIST (cp) = 0;	410	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (cp);	411	SvREFCNT_dec (cp);
242	#else	412	#else
243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	413	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
246	}	416	}
247		417
248	static void	418	static void
249	put_padlist (pTHX_ CV *cv)	419	put_padlist (pTHX_ CV *cv)
250	{	420	{
251	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	421	MAGIC *mg = CORO_MAGIC (cv);
		422	AV *av;
252		423
253	if (!mg)	424	if (expect_false (!mg))
254	{	425	{
255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	426	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257	mg->mg_virtual = &vtbl_coro;	428	mg->mg_virtual = &vtbl_coro;
258	mg->mg_obj = (SV *)newAV ();	429	mg->mg_obj = (SV *)newAV ();
259	}	430	}
260		431
261	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	432	av = (AV *)mg->mg_obj;
262	}
263		433
264	#define SB do {	434	if (expect_false (AvFILLp (av) >= AvMAX (av)))
265	#define SE } while (0)	435	av_extend (av, AvMAX (av) + 1);
266		436
267	#define LOAD(state) load_state(aTHX_ (state));	437	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	438	}
269		439
270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	440	/** load & save, init *******************************************************/
271		441
272	static void	442	static void
273	load_state(pTHX_ Coro__State c)	443	load_perl (pTHX_ Coro__State c)
274	{	444	{
275	PL_dowarn = c->dowarn;	445	perl_slots *slot = c->slot;
276	PL_in_eval = c->in_eval;	446	c->slot = 0;
277		447
278	PL_curstackinfo = c->curstackinfo;
279	PL_curstack = c->curstack;
280	PL_mainstack = c->mainstack;	448	PL_mainstack = c->mainstack;
281	PL_stack_sp = c->stack_sp;
282	PL_op = c->op;
283	PL_curpad = c->curpad;
284	PL_comppad = c->comppad;
285	PL_compcv = c->compcv;
286	PL_stack_base = c->stack_base;
287	PL_stack_max = c->stack_max;
288	PL_tmps_stack = c->tmps_stack;
289	PL_tmps_floor = c->tmps_floor;
290	PL_tmps_ix = c->tmps_ix;
291	PL_tmps_max = c->tmps_max;
292	PL_markstack = c->markstack;
293	PL_markstack_ptr = c->markstack_ptr;
294	PL_markstack_max = c->markstack_max;
295	PL_scopestack = c->scopestack;
296	PL_scopestack_ix = c->scopestack_ix;
297	PL_scopestack_max = c->scopestack_max;
298	PL_savestack = c->savestack;
299	PL_savestack_ix = c->savestack_ix;
300	PL_savestack_max = c->savestack_max;
301	#if PERL_VERSION < 9
302	PL_retstack = c->retstack;
303	PL_retstack_ix = c->retstack_ix;
304	PL_retstack_max = c->retstack_max;
305	#endif
306	PL_curpm = c->curpm;
307	PL_curcop = c->curcop;
308		449
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	450	GvSV (PL_defgv) = slot->defsv;
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	451	GvAV (PL_defgv) = slot->defav;
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	452	GvSV (PL_errgv) = slot->errsv;
		453	GvSV (irsgv) = slot->irsgv;
		454
		455	#define VAR(name,type) PL_ ## name = slot->name;
		456	# include "state.h"
		457	#undef VAR
		458
		459	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
		460	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
312		461
313	{	462	{
314	dSP;	463	dSP;
		464
315	CV *cv;	465	CV *cv;
316		466
317	/* now do the ugly restore mess */	467	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	468	while (expect_true (cv = (CV *)POPs))
319	{	469	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	470	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	471	CvDEPTH (cv) = PTR2IV (POPs);
326	}	472	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	473	}
330		474
331	PUTBACK;	475	PUTBACK;
332	}	476	}
333	}	477	}
334		478
335	static void	479	static void
336	save_state(pTHX_ Coro__State c, int flags)	480	save_perl (pTHX_ Coro__State c)
337	{	481	{
338	{	482	{
339	dSP;	483	dSP;
340	I32 cxix = cxstack_ix;	484	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	485	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	488	/*
345	* the worst thing you can imagine happens first - we have to save	489	* the worst thing you can imagine happens first - we have to save
346	* (and reinitialize) all cv's in the whole callchain :(	490	* (and reinitialize) all cv's in the whole callchain :(
347	*/	491	*/
348		492
349	PUSHs (Nullsv);	493	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	494	/* this loop was inspired by pp_caller */
351	for (;;)	495	for (;;)
352	{	496	{
353	while (cxix >= 0)	497	while (expect_true (cxix >= 0))
354	{	498	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	499	PERL_CONTEXT *cx = &ccstk[cxix--];
356		500
357	if (CxTYPE(cx) == CXt_SUB)	501	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
358	{	502	{
359	CV *cv = cx->blk_sub.cv;	503	CV *cv = cx->blk_sub.cv;
		504
360	if (CvDEPTH(cv))	505	if (expect_true (CvDEPTH (cv)))
361	{	506	{
362	EXTEND (SP, CvDEPTH(cv)*2);	507	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	508	PUSHs ((SV *)CvPADLIST (cv));
		509	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	510	PUSHs ((SV *)cv);
373		511
		512	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	513	get_padlist (aTHX_ cv);
375	}	514	}
376	}	515	}
377	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)
379	{
380	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}
384	#endif
385	}	516	}
386		517
387	if (top_si->si_type == PERLSI_MAIN)	518	if (expect_true (top_si->si_type == PERLSI_MAIN))
388	break;	519	break;
389		520
390	top_si = top_si->si_prev;	521	top_si = top_si->si_prev;
391	ccstk = top_si->si_cxstack;	522	ccstk = top_si->si_cxstack;
392	cxix = top_si->si_cxix;	523	cxix = top_si->si_cxix;
393	}	524	}
394		525
395	PUTBACK;	526	PUTBACK;
396	}	527	}
397		528
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	529	/* allocate some space on the context stack for our purposes */
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	530	/* we manually unroll here, as usually 2 slots is enough */
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	531	if (SLOT_COUNT >= 1) CXINC;
		532	if (SLOT_COUNT >= 2) CXINC;
		533	if (SLOT_COUNT >= 3) CXINC;
		534	{
		535	int i;
		536	for (i = 3; i < SLOT_COUNT; ++i)
		537	CXINC;
		538	}
		539	cxstack_ix -= SLOT_COUNT; /* undo allocation */
401		540
402	c->dowarn = PL_dowarn;
403	c->in_eval = PL_in_eval;
404
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;	541	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;	542
409	c->op = PL_op;	543	{
410	c->curpad = PL_curpad;	544	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411	c->comppad = PL_comppad;	545
412	c->compcv = PL_compcv;	546	slot->defav = GvAV (PL_defgv);
413	c->stack_base = PL_stack_base;	547	slot->defsv = DEFSV;
414	c->stack_max = PL_stack_max;	548	slot->errsv = ERRSV;
415	c->tmps_stack = PL_tmps_stack;	549	slot->irsgv = GvSV (irsgv);
416	c->tmps_floor = PL_tmps_floor;	550
417	c->tmps_ix = PL_tmps_ix;	551	#define VAR(name,type) slot->name = PL_ ## name;
418	c->tmps_max = PL_tmps_max;	552	# include "state.h"
419	c->markstack = PL_markstack;	553	#undef VAR
420	c->markstack_ptr = PL_markstack_ptr;	554	}
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	}	555	}
436		556
437	/*	557	/*
438	* allocate various perl stacks. This is an exact copy	558	* allocate various perl stacks. This is an exact copy
439	* of perl.c:init_stacks, except that it uses less memory	559	* of perl.c:init_stacks, except that it uses less memory
440	* on the (sometimes correct) assumption that coroutines do	560	* on the (sometimes correct) assumption that coroutines do
441	* not usually need a lot of stackspace.	561	* not usually need a lot of stackspace.
442	*/	562	*/
		563	#if CORO_PREFER_PERL_FUNCTIONS
		564	# define coro_init_stacks init_stacks
		565	#else
443	static void	566	static void
444	coro_init_stacks (pTHX)	567	coro_init_stacks (pTHX)
445	{	568	{
446	LOCK;	569	PL_curstackinfo = new_stackinfo(32, 8);
447
448	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
449	PL_curstackinfo->si_type = PERLSI_MAIN;	570	PL_curstackinfo->si_type = PERLSI_MAIN;
450	PL_curstack = PL_curstackinfo->si_stack;	571	PL_curstack = PL_curstackinfo->si_stack;
451	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	572	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452		573
453	PL_stack_base = AvARRAY(PL_curstack);	574	PL_stack_base = AvARRAY(PL_curstack);
454	PL_stack_sp = PL_stack_base;	575	PL_stack_sp = PL_stack_base;
455	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	576	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456		577
457	New(50,PL_tmps_stack,96,SV*);	578	New(50,PL_tmps_stack,32,SV*);
458	PL_tmps_floor = -1;	579	PL_tmps_floor = -1;
459	PL_tmps_ix = -1;	580	PL_tmps_ix = -1;
460	PL_tmps_max = 96;	581	PL_tmps_max = 32;
461		582
462	New(54,PL_markstack,16,I32);	583	New(54,PL_markstack,16,I32);
463	PL_markstack_ptr = PL_markstack;	584	PL_markstack_ptr = PL_markstack;
464	PL_markstack_max = PL_markstack + 16;	585	PL_markstack_max = PL_markstack + 16;
465		586
466	#ifdef SET_MARK_OFFSET	587	#ifdef SET_MARK_OFFSET
467	SET_MARK_OFFSET;	588	SET_MARK_OFFSET;
468	#endif	589	#endif
469		590
470	New(54,PL_scopestack,16,I32);	591	New(54,PL_scopestack,8,I32);
471	PL_scopestack_ix = 0;	592	PL_scopestack_ix = 0;
472	PL_scopestack_max = 16;	593	PL_scopestack_max = 8;
473		594
474	New(54,PL_savestack,96,ANY);	595	New(54,PL_savestack,24,ANY);
475	PL_savestack_ix = 0;	596	PL_savestack_ix = 0;
476	PL_savestack_max = 96;	597	PL_savestack_max = 24;
477		598
478	#if PERL_VERSION < 9	599	#if !PERL_VERSION_ATLEAST (5,9,0)
479	New(54,PL_retstack,8,OP*);	600	New(54,PL_retstack,4,OP*);
480	PL_retstack_ix = 0;	601	PL_retstack_ix = 0;
481	PL_retstack_max = 8;	602	PL_retstack_max = 4;
482	#endif	603	#endif
483
484	UNLOCK;
485	}	604	}
		605	#endif
486		606
487	/*	607	/*
488	* destroy the stacks, the callchain etc...	608	* destroy the stacks, the callchain etc...
489	*/	609	*/
490	static void	610	static void
491	destroy_stacks(pTHX)	611	coro_destroy_stacks (pTHX)
492	{	612	{
493	if (!IN_DESTRUCT)
494	{
495	/* is this ugly, I ask? */
496	LEAVE_SCOPE (0);
497
498	/* sure it is, but more important: is it correct?? :/ */
499	FREETMPS;
500
501	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
502	}
503
504	while (PL_curstackinfo->si_next)	613	while (PL_curstackinfo->si_next)
505	PL_curstackinfo = PL_curstackinfo->si_next;	614	PL_curstackinfo = PL_curstackinfo->si_next;
506		615
507	while (PL_curstackinfo)	616	while (PL_curstackinfo)
508	{	617	{
509	PERL_SI *p = PL_curstackinfo->si_prev;	618	PERL_SI *p = PL_curstackinfo->si_prev;
510		619
511	{ /*D*//*remove*/
512	dSP;
513	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514	PUTBACK; /* possibly superfluous */
515	}
516
517	if (!IN_DESTRUCT)	620	if (!IN_DESTRUCT)
518	{
519	dounwind (-1);/*D*//*remove*/
520	SvREFCNT_dec (PL_curstackinfo->si_stack);	621	SvREFCNT_dec (PL_curstackinfo->si_stack);
521	}
522		622
523	Safefree (PL_curstackinfo->si_cxstack);	623	Safefree (PL_curstackinfo->si_cxstack);
524	Safefree (PL_curstackinfo);	624	Safefree (PL_curstackinfo);
525	PL_curstackinfo = p;	625	PL_curstackinfo = p;
526	}	626	}
527		627
528	Safefree (PL_tmps_stack);	628	Safefree (PL_tmps_stack);
529	Safefree (PL_markstack);	629	Safefree (PL_markstack);
530	Safefree (PL_scopestack);	630	Safefree (PL_scopestack);
531	Safefree (PL_savestack);	631	Safefree (PL_savestack);
532	#if PERL_VERSION < 9	632	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree (PL_retstack);	633	Safefree (PL_retstack);
534	#endif	634	#endif
535	}	635	}
536		636
537	static void	637	static size_t
538	setup_coro (struct coro *coro)	638	coro_rss (pTHX_ struct coro *coro)
		639	{
		640	size_t rss = sizeof (*coro);
		641
		642	if (coro->mainstack)
		643	{
		644	perl_slots tmp_slot;
		645	perl_slots *slot;
		646
		647	if (coro->flags & CF_RUNNING)
		648	{
		649	slot = &tmp_slot;
		650
		651	#define VAR(name,type) slot->name = PL_ ## name;
		652	# include "state.h"
		653	#undef VAR
		654	}
		655	else
		656	slot = coro->slot;
		657
		658	rss += sizeof (slot->curstackinfo);
		659	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		660	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		661	rss += slot->tmps_max * sizeof (SV *);
		662	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		663	rss += slot->scopestack_max * sizeof (I32);
		664	rss += slot->savestack_max * sizeof (ANY);
		665
		666	#if !PERL_VERSION_ATLEAST (5,9,0)
		667	rss += slot->retstack_max * sizeof (OP *);
		668	#endif
		669	}
		670
		671	return rss;
		672	}
		673
		674	/** coroutine stack handling ************************************************/
		675
		676	static void
		677	coro_setup (pTHX_ struct coro *coro)
539	{	678	{
540	/*	679	/*
541	* emulate part of the perl startup here.	680	* emulate part of the perl startup here.
542	*/	681	*/
543	dTHX;	682	coro_init_stacks (aTHX);
		683
		684	PL_runops = RUNOPS_DEFAULT;
		685	PL_curcop = &PL_compiling;
		686	PL_in_eval = EVAL_NULL;
		687	PL_comppad = 0;
		688	PL_curpm = 0;
		689	PL_curpad = 0;
		690	PL_localizing = 0;
		691	PL_dirty = 0;
		692	PL_restartop = 0;
		693	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		694	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		695
		696	GvSV (PL_defgv) = newSV (0);
		697	GvAV (PL_defgv) = coro->args; coro->args = 0;
		698	GvSV (PL_errgv) = newSV (0);
		699	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		700	PL_rs = newSVsv (GvSV (irsgv));
		701	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		702
		703	{
		704	dSP;
		705	LOGOP myop;
		706
		707	Zero (&myop, 1, LOGOP);
		708	myop.op_next = Nullop;
		709	myop.op_flags = OPf_WANT_VOID;
		710
		711	PUSHMARK (SP);
		712	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		713	PUTBACK;
		714	PL_op = (OP *)&myop;
		715	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		716	SPAGAIN;
		717
		718	/*
		719	* now its very tricky. the "tail" of the next transfer might end up
		720	* either in a new cctx, or an existing one.
		721	* in case of an existing one we have to take care of whatever
		722	* entersub and transfer do to the perl stack.
		723	*/
		724	ENTER;
		725	EXTEND (SP, 4);
		726	PUSHs ((SV *)0); /* items */
		727	PUSHs ((SV *)0); /* ix, set_stacklevel */
		728	PUSHs ((SV *)(sp - PL_stack_base + 1)); /* ax */
		729	PUSHs ((SV *)0); /* again */
		730	PUTBACK;
		731	}
		732
		733	/* this newly created coroutine might be run on an existing cctx which most
		734	* likely was suspended in set_stacklevel, called from entersub.
		735	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		736	* so we ENTER here for symmetry
		737	*/
		738	ENTER;
		739	}
		740
		741	static void
		742	coro_destroy (pTHX_ struct coro *coro)
		743	{
		744	if (!IN_DESTRUCT)
		745	{
		746	/* restore all saved variables and stuff */
		747	LEAVE_SCOPE (0);
		748	assert (PL_tmps_floor == -1);
		749
		750	/* free all temporaries */
		751	FREETMPS;
		752	assert (PL_tmps_ix == -1);
		753
		754	/* unwind all extra stacks */
		755	POPSTACK_TO (PL_mainstack);
		756
		757	/* unwind main stack */
		758	dounwind (-1);
		759	}
		760
		761	SvREFCNT_dec (GvSV (PL_defgv));
		762	SvREFCNT_dec (GvAV (PL_defgv));
		763	SvREFCNT_dec (GvSV (PL_errgv));
		764	SvREFCNT_dec (PL_defoutgv);
		765	SvREFCNT_dec (PL_rs);
		766	SvREFCNT_dec (GvSV (irsgv));
		767
		768	SvREFCNT_dec (PL_diehook);
		769	SvREFCNT_dec (PL_warnhook);
		770
		771	SvREFCNT_dec (coro->saved_deffh);
		772	SvREFCNT_dec (coro->throw);
		773
		774	coro_destroy_stacks (aTHX);
		775	}
		776
		777	static void
		778	free_coro_mortal (pTHX)
		779	{
		780	if (expect_true (coro_mortal))
		781	{
		782	SvREFCNT_dec (coro_mortal);
		783	coro_mortal = 0;
		784	}
		785	}
		786
		787	static int
		788	runops_trace (pTHX)
		789	{
		790	COP *oldcop = 0;
		791	int oldcxix = -2;
		792	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		793	coro_cctx *cctx = coro->cctx;
		794
		795	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		796	{
		797	PERL_ASYNC_CHECK ();
		798
		799	if (cctx->flags & CC_TRACE_ALL)
		800	{
		801	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		802	{
		803	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		804	SV **bot, **top;
		805	AV *av = newAV (); /* return values */
		806	SV **cb;
		807	dSP;
		808
		809	GV *gv = CvGV (cx->blk_sub.cv);
		810	SV *fullname = sv_2mortal (newSV (0));
		811	if (isGV (gv))
		812	gv_efullname3 (fullname, gv, 0);
		813
		814	bot = PL_stack_base + cx->blk_oldsp + 1;
		815	top = cx->blk_gimme == G_ARRAY ? SP + 1
		816	: cx->blk_gimme == G_SCALAR ? bot + 1
		817	: bot;
		818
		819	av_extend (av, top - bot);
		820	while (bot < top)
		821	av_push (av, SvREFCNT_inc (*bot++));
		822
		823	PL_runops = RUNOPS_DEFAULT;
		824	ENTER;
		825	SAVETMPS;
		826	EXTEND (SP, 3);
		827	PUSHMARK (SP);
		828	PUSHs (&PL_sv_no);
		829	PUSHs (fullname);
		830	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		831	PUTBACK;
		832	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		833	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		834	SPAGAIN;
		835	FREETMPS;
		836	LEAVE;
		837	PL_runops = runops_trace;
		838	}
		839
		840	if (oldcop != PL_curcop)
		841	{
		842	oldcop = PL_curcop;
		843
		844	if (PL_curcop != &PL_compiling)
		845	{
		846	SV **cb;
		847
		848	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		849	{
		850	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		851
		852	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		853	{
		854	runops_proc_t old_runops = PL_runops;
		855	dSP;
		856	GV *gv = CvGV (cx->blk_sub.cv);
		857	SV *fullname = sv_2mortal (newSV (0));
		858
		859	if (isGV (gv))
		860	gv_efullname3 (fullname, gv, 0);
		861
		862	PL_runops = RUNOPS_DEFAULT;
		863	ENTER;
		864	SAVETMPS;
		865	EXTEND (SP, 3);
		866	PUSHMARK (SP);
		867	PUSHs (&PL_sv_yes);
		868	PUSHs (fullname);
		869	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		870	PUTBACK;
		871	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		872	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		873	SPAGAIN;
		874	FREETMPS;
		875	LEAVE;
		876	PL_runops = runops_trace;
		877	}
		878
		879	oldcxix = cxstack_ix;
		880	}
		881
		882	if (cctx->flags & CC_TRACE_LINE)
		883	{
		884	dSP;
		885
		886	PL_runops = RUNOPS_DEFAULT;
		887	ENTER;
		888	SAVETMPS;
		889	EXTEND (SP, 3);
		890	PL_runops = RUNOPS_DEFAULT;
		891	PUSHMARK (SP);
		892	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		893	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		894	PUTBACK;
		895	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		896	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		897	SPAGAIN;
		898	FREETMPS;
		899	LEAVE;
		900	PL_runops = runops_trace;
		901	}
		902	}
		903	}
		904	}
		905	}
		906
		907	TAINT_NOT;
		908	return 0;
		909	}
		910
		911	/* inject a fake call to Coro::State::_cctx_init into the execution */
		912	/* _cctx_init should be careful, as it could be called at almost any time */
		913	/* during execution of a perl program */
		914	static void NOINLINE
		915	cctx_prepare (pTHX_ coro_cctx *cctx)
		916	{
544	dSP;	917	dSP;
545	UNOP myop;	918	LOGOP myop;
546	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547		919
548	coro_init_stacks (aTHX);	920	PL_top_env = &PL_start_env;
549	/*PL_curcop = 0;*/
550	/*PL_in_eval = PL_in_eval;*/ /* inherit */
551	SvREFCNT_dec (GvAV (PL_defgv));
552	GvAV (PL_defgv) = coro->args; coro->args = 0;
553		921
554	SPAGAIN;	922	if (cctx->flags & CC_TRACE)
		923	PL_runops = runops_trace;
555		924
556	Zero (&myop, 1, UNOP);	925	Zero (&myop, 1, LOGOP);
557	myop.op_next = Nullop;	926	myop.op_next = PL_op;
558	myop.op_flags = OPf_WANT_VOID;	927	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559		928
		929	PUSHMARK (SP);
		930	EXTEND (SP, 2);
		931	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		932	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		933	PUTBACK;
560	PL_op = (OP *)&myop;	934	PL_op = (OP *)&myop;
561
562	PUSHMARK(SP);
563	XPUSHs (sub_init);
564	PUTBACK;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	935	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	936	SPAGAIN;
567
568	ENTER; /* necessary e.g. for dounwind */
569	}	937	}
570		938
		939	/*
		940	* this is a _very_ stripped down perl interpreter ;)
		941	*/
571	static void	942	static void
572	free_coro_mortal ()
573	{
574	if (coro_mortal)
575	{
576	SvREFCNT_dec (coro_mortal);
577	coro_mortal = 0;
578	}
579	}
580
581	static void
582	coro_run (void *arg)	943	cctx_run (void *arg)
583	{	944	{
		945	dTHX;
		946
		947	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		948	UNLOCK;
		949
		950	/* we now skip the entersub that lead to transfer() */
		951	PL_op = PL_op->op_next;
		952
		953	/* inject a fake subroutine call to cctx_init */
		954	cctx_prepare (aTHX_ (coro_cctx *)arg);
		955
		956	/* somebody or something will hit me for both perl_run and PL_restartop */
		957	PL_restartop = PL_op;
		958	perl_run (PL_curinterp);
		959
584	/*	960	/*
585	* this is a _very_ stripped down perl interpreter ;)	961	* If perl-run returns we assume exit() was being called or the coro
		962	* fell off the end, which seems to be the only valid (non-bug)
		963	* reason for perl_run to return. We try to exit by jumping to the
		964	* bootstrap-time "top" top_env, as we cannot restore the "main"
		965	* coroutine as Coro has no such concept
586	*/	966	*/
587	dTHX;
588	int ret;
589
590	UNLOCK;
591
592	PL_top_env = &PL_start_env;	967	PL_top_env = main_top_env;
593		968	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
595	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
596
597	/* continue at cctx_init, without entersub */
598	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599
600	/* somebody will hit me for both perl_run and PL_restartop */
601	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
602	printf ("ret %d\n", ret);//D
603
604	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
605	abort ();
606	}	969	}
607		970
608	static coro_stack *	971	static coro_cctx *
609	stack_new ()	972	cctx_new ()
610	{	973	{
611	coro_stack *stack;	974	coro_cctx *cctx;
		975	void *stack_start;
		976	size_t stack_size;
612		977
		978	++cctx_count;
		979
613	New (0, stack, 1, coro_stack);	980	Newz (0, cctx, 1, coro_cctx);
614		981
615	#if HAVE_MMAP	982	#if HAVE_MMAP
616
617	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	983	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
618	/* mmap suppsedly does allocate-on-write for us */	984	/* mmap supposedly does allocate-on-write for us */
619	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	985	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620		986
621	if (stack->sptr == (void *)-1)	987	if (cctx->sptr != (void *)-1)
622	{
623	perror ("FATAL: unable to mmap stack for coroutine");
624	_exit (EXIT_FAILURE);
625	}	988	{
626
627	# if STACKGUARD	989	# if CORO_STACKGUARD
628	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	990	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
629	# endif	991	# endif
		992	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		993	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		994	cctx->flags |= CC_MAPPED;
		995	}
		996	else
		997	#endif
		998	{
		999	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1000	New (0, cctx->sptr, coro_stacksize, long);
630		1001
		1002	if (!cctx->sptr)
		1003	{
		1004	perror ("FATAL: unable to allocate stack for coroutine");
		1005	_exit (EXIT_FAILURE);
		1006	}
		1007
		1008	stack_start = cctx->sptr;
		1009	stack_size = cctx->ssize;
		1010	}
		1011
		1012	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1013	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1014
		1015	return cctx;
		1016	}
		1017
		1018	static void
		1019	cctx_destroy (coro_cctx *cctx)
		1020	{
		1021	if (!cctx)
		1022	return;
		1023
		1024	--cctx_count;
		1025
		1026	#if CORO_USE_VALGRIND
		1027	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1028	#endif
		1029
		1030	#if HAVE_MMAP
		1031	if (cctx->flags & CC_MAPPED)
		1032	munmap (cctx->sptr, cctx->ssize);
		1033	else
		1034	#endif
		1035	Safefree (cctx->sptr);
		1036
		1037	Safefree (cctx);
		1038	}
		1039
		1040	/* wether this cctx should be destructed */
		1041	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1042
		1043	static coro_cctx *
		1044	cctx_get (pTHX_ int gimme)
		1045	{
		1046	while (expect_true (cctx_first[gimme]))
		1047	{
		1048	coro_cctx *cctx = cctx_first[gimme];
		1049	cctx_first[gimme] = cctx->next;
		1050	--cctx_idle[gimme];
		1051
		1052	if (expect_true (!CCTX_EXPIRED (cctx)))
		1053	return cctx;
		1054
		1055	cctx_destroy (cctx);
		1056	}
		1057
		1058	assert (!gimme);
		1059	return cctx_new ();
		1060	}
		1061
		1062	static void
		1063	cctx_put (coro_cctx *cctx, int gimme)
		1064	{
		1065	/* free another cctx if overlimit */
		1066	if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX))
		1067	{
		1068	coro_cctx *first = cctx_first[gimme];
		1069	cctx_first[gimme] = first->next;
		1070	--cctx_idle[gimme];
		1071
		1072	cctx_destroy (first);
		1073	}
		1074
		1075	++cctx_idle[gimme];
		1076	cctx->next = cctx_first[gimme];
		1077	cctx_first[gimme] = cctx;
		1078	}
		1079
		1080	/** coroutine switching *****************************************************/
		1081
		1082	static void
		1083	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1084	{
		1085	if (expect_true (prev != next))
		1086	{
		1087	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1088	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1089
		1090	if (expect_false (next->flags & CF_RUNNING))
		1091	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1092
		1093	if (expect_false (next->flags & CF_DESTROYED))
		1094	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1095
		1096	if (
		1097	#if PERL_VERSION_ATLEAST (5,9,0)
		1098	expect_false (PL_parser)
631	#else	1099	#else
632		1100	expect_false (PL_lex_state != LEX_NOTPARSING)
633	stack->ssize = STACKSIZE * (long)sizeof (long);
634	New (0, stack->sptr, STACKSIZE, long);
635
636	if (!stack->sptr)
637	{
638	perror (stderr, "FATAL: unable to malloc stack for coroutine");
639	_exit (EXIT_FAILURE);
640	}
641
642	#endif	1101	#endif
643		1102	)
644	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	1103	croak ("Coro::State::transfer called while parsing, but this is not supported");
645
646	return stack;
647	}
648
649	static void
650	stack_free (coro_stack *stack)
651	{
652	if (!stack || stack == main_stack)
653	return;
654
655	#if HAVE_MMAP
656	munmap (stack->sptr, stack->ssize);
657	#else
658	Safefree (stack->sptr);
659	#endif
660
661	Safefree (stack);
662	}
663
664	static coro_stack *stack_first;
665
666	static coro_stack *
667	stack_get ()
668	{
669	coro_stack *stack;
670
671	if (stack_first)
672	{
673	stack = stack_first;
674	stack_first = stack->next;
675	}
676	else
677	{
678	stack = stack_new ();
679	PL_op = PL_op->op_next;
680	}	1104	}
681
682	return stack;
683	}	1105	}
684		1106
685	static void	1107	/* always use the TRANSFER macro */
686	stack_put (coro_stack *stack)	1108	static void NOINLINE
687	{
688	stack->next = stack_first;
689	stack_first = stack;
690	}
691
692	/* never call directly, always through the coro_state_transfer global variable */
693	static void
694	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1109	transfer (pTHX_ struct coro *prev, struct coro *next)
695	{	1110	{
696	dSTACKLEVEL;	1111	dSTACKLEVEL;
697		1112
698	/* sometimes transfer is only called to set idle_sp */	1113	/* sometimes transfer is only called to set idle_sp */
699	if (flags == TRANSFER_SET_STACKLEVEL)	1114	if (expect_false (!next))
		1115	{
700	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1116	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
701	else if (prev != next)	1117	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
702	{	1118	}
		1119	else if (expect_true (prev != next))
		1120	{
703	coro_stack *prev__stack;	1121	coro_cctx *prev__cctx;
		1122
		1123	if (expect_false (prev->flags & CF_NEW))
		1124	{
		1125	/* create a new empty context */
		1126	Newz (0, prev->cctx, 1, coro_cctx);
		1127	prev->flags &= ~CF_NEW;
		1128	prev->flags |= CF_RUNNING;
		1129	}
		1130
		1131	prev->flags &= ~CF_RUNNING;
		1132	next->flags |= CF_RUNNING;
704		1133
705	LOCK;	1134	LOCK;
706		1135
707	if (next->mainstack)	1136	if (expect_false (next->flags & CF_NEW))
708	{	1137	{
709	/* coroutine already started */	1138	/* need to start coroutine */
710	SAVE (prev, flags);	1139	next->flags &= ~CF_NEW;
711	LOAD (next);	1140	/* first get rid of the old state */
		1141	save_perl (aTHX_ prev);
		1142	/* setup coroutine call */
		1143	coro_setup (aTHX_ next);
712	}	1144	}
713	else	1145	else
714	{	1146	{
715	/* need to start coroutine */	1147	/* coroutine already started */
716	/* first get rid of the old state */	1148	save_perl (aTHX_ prev);
717	SAVE (prev, -1);	1149	load_perl (aTHX_ next);
718	/* setup coroutine call */
719	setup_coro (next);
720	/* need a stack */
721	next->stack = 0;
722	}	1150	}
723		1151
724	prev__stack = prev->stack;	1152	prev__cctx = prev->cctx;
725		1153
726	/* possibly "free" the stack */	1154	/* possibly "free" the cctx */
727	if (prev__stack->idle_sp == STACKLEVEL)	1155	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
728	{	1156	{
729	stack_put (prev__stack);	1157	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1158	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1159
730	prev->stack = 0;	1160	prev->cctx = 0;
		1161
		1162	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1163	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1164	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1165	if (!next->cctx)
		1166	next->cctx = cctx_get (aTHX_ next->gimme);
		1167
		1168	cctx_put (prev__cctx, prev->gimme);
731	}	1169	}
732		1170
733	if (!next->stack)	1171	++next->usecount;
734	next->stack = stack_get ();
735		1172
736	if (prev__stack != next->stack)	1173	if (expect_true (!next->cctx))
		1174	next->cctx = cctx_get (aTHX_ next->gimme);
		1175
		1176	if (expect_false (prev__cctx != next->cctx))
737	{	1177	{
738	prev__stack->top_env = PL_top_env;	1178	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->stack->top_env;	1179	PL_top_env = next->cctx->top_env;
740	printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1180	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742	}	1181	}
743		1182
744	free_coro_mortal ();	1183	free_coro_mortal (aTHX);
745
746	UNLOCK;	1184	UNLOCK;
747	}
748	}
749		1185
750	/* use this function pointer to call the above function */	1186	if (expect_false (prev->throw || next->throw))
751	/* this is done to increase chances of the compiler not inlining the call */	1187	{
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */	1188	struct coro *coro = SvSTATE (coro_current);
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1189
		1190	if (coro->throw)
		1191	{
		1192	SV *exception = coro->throw;
		1193	coro->throw = 0;
		1194	sv_setsv (ERRSV, exception);
		1195	croak (0);
		1196	}
		1197	}
		1198	}
		1199	}
754		1200
755	struct transfer_args	1201	struct transfer_args
756	{	1202	{
757	struct coro *prev, *next;	1203	struct coro *prev, *next;
758	int flags;
759	};	1204	};
760		1205
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1206	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1207	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
762		1208
		1209	/** high level stuff ********************************************************/
		1210
763	static void	1211	static int
764	coro_state_destroy (struct coro *coro)	1212	coro_state_destroy (pTHX_ struct coro *coro)
765	{	1213	{
766	if (coro->refcnt--)	1214	if (coro->flags & CF_DESTROYED)
767	return;	1215	return 0;
		1216
		1217	coro->flags |= CF_DESTROYED;
		1218
		1219	if (coro->flags & CF_READY)
		1220	{
		1221	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1222	/* alternative: look through all ready queues and remove the coro */
		1223	LOCK;
		1224	--coro_nready;
		1225	UNLOCK;
		1226	}
		1227	else
		1228	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768		1229
769	if (coro->mainstack && coro->mainstack != main_mainstack)	1230	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	1231	{
771	struct coro temp;	1232	struct coro temp;
772		1233
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1234	if (coro->flags & CF_RUNNING)
		1235	croak ("FATAL: tried to destroy currently running coroutine");
		1236
		1237	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	1238	load_perl (aTHX_ coro);
775		1239
776	destroy_stacks (aTHX);	1240	coro_destroy (aTHX_ coro);
777		1241
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1242	load_perl (aTHX_ &temp);
779		1243
780	coro->mainstack = 0;	1244	coro->slot = 0;
781	}	1245	}
782		1246
783	stack_free (coro->stack);	1247	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	1248	SvREFCNT_dec (coro->args);
785	Safefree (coro);	1249
		1250	if (coro->next) coro->next->prev = coro->prev;
		1251	if (coro->prev) coro->prev->next = coro->next;
		1252	if (coro == coro_first) coro_first = coro->next;
		1253
		1254	return 1;
786	}	1255	}
787		1256
788	static int	1257	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	1258	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	1259	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	1260	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	1261	mg->mg_ptr = 0;
793		1262
		1263	coro->hv = 0;
		1264
		1265	if (--coro->refcnt < 0)
		1266	{
794	coro_state_destroy (coro);	1267	coro_state_destroy (aTHX_ coro);
		1268	Safefree (coro);
		1269	}
795		1270
796	return 0;	1271	return 0;
797	}	1272	}
798		1273
799	static int	1274	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1275	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	1276	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	1277	struct coro *coro = (struct coro *)mg->mg_ptr;
803		1278
804	++coro->refcnt;	1279	++coro->refcnt;
805		1280
806	return 0;	1281	return 0;
807	}	1282	}
808		1283
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1284	static MGVTBL coro_state_vtbl = {
		1285	0, 0, 0, 0,
		1286	coro_state_free,
		1287	0,
		1288	#ifdef MGf_DUP
		1289	coro_state_dup,
		1290	#else
		1291	# define MGf_DUP 0
		1292	#endif
		1293	};
810		1294
811	static struct coro *
812	SvSTATE (SV *coro)
813	{
814	HV *stash;
815	MAGIC *mg;
816
817	if (SvROK (coro))
818	coro = SvRV (coro);
819
820	stash = SvSTASH (coro);
821	if (stash != coro_stash && stash != coro_state_stash)
822	{
823	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");
826	}
827
828	mg = SvMAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;
831	}
832
833	static void	1295	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1296	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	1297	{
836	ta->prev = SvSTATE (prev);	1298	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	1299	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;	1300	TRANSFER_CHECK (*ta);
839	}	1301	}
840		1302
841	static void	1303	static void
842	api_transfer (SV *prev, SV *next, int flags)	1304	api_transfer (SV *prev_sv, SV *next_sv)
843	{	1305	{
844	dTHX;	1306	dTHX;
845	struct transfer_args ta;	1307	struct transfer_args ta;
846		1308
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	1309	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	1310	TRANSFER (ta);
849	}	1311	}
850		1312
851	/** Coro ********************************************************************/	1313	/** Coro ********************************************************************/
852		1314
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	1315	static void
866	coro_enq (pTHX_ SV *sv)	1316	coro_enq (pTHX_ SV *coro_sv)
867	{	1317	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	1318	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	1319	}
878		1320
879	static SV *	1321	static SV *
880	coro_deq (pTHX_ int min_prio)	1322	coro_deq (pTHX_ int min_prio)
881	{	1323	{
…		…
885	if (min_prio < 0)	1327	if (min_prio < 0)
886	min_prio = 0;	1328	min_prio = 0;
887		1329
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1330	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1331	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1332	return av_shift (coro_ready [prio]);
893	}
894		1333
895	return 0;	1334	return 0;
896	}	1335	}
897		1336
898	static void	1337	static int
899	api_ready (SV *coro)	1338	api_ready (SV *coro_sv)
900	{	1339	{
901	dTHX;	1340	dTHX;
		1341	struct coro *coro;
902		1342
903	if (SvROK (coro))	1343	if (SvROK (coro_sv))
904	coro = SvRV (coro);	1344	coro_sv = SvRV (coro_sv);
		1345
		1346	coro = SvSTATE (coro_sv);
		1347
		1348	if (coro->flags & CF_READY)
		1349	return 0;
		1350
		1351	coro->flags |= CF_READY;
905		1352
906	LOCK;	1353	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1354	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1355	++coro_nready;
908	UNLOCK;	1356	UNLOCK;
909	}
910		1357
		1358	return 1;
		1359	}
		1360
911	static void	1361	static int
		1362	api_is_ready (SV *coro_sv)
		1363	{
		1364	dTHX;
		1365	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1366	}
		1367
		1368	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	1369	prepare_schedule (pTHX_ struct transfer_args *ta)
913	{	1370	{
914	SV *current, *prev, *next;	1371	SV *prev_sv, *next_sv;
		1372
		1373	for (;;)
		1374	{
		1375	LOCK;
		1376	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1377
		1378	/* nothing to schedule: call the idle handler */
		1379	if (expect_false (!next_sv))
		1380	{
		1381	dSP;
		1382	UNLOCK;
		1383
		1384	ENTER;
		1385	SAVETMPS;
		1386
		1387	PUSHMARK (SP);
		1388	PUTBACK;
		1389	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1390
		1391	FREETMPS;
		1392	LEAVE;
		1393	continue;
		1394	}
		1395
		1396	ta->next = SvSTATE (next_sv);
		1397
		1398	/* cannot transfer to destroyed coros, skip and look for next */
		1399	if (expect_false (ta->next->flags & CF_DESTROYED))
		1400	{
		1401	UNLOCK;
		1402	SvREFCNT_dec (next_sv);
		1403	/* coro_nready is already taken care of by destroy */
		1404	continue;
		1405	}
		1406
		1407	--coro_nready;
		1408	UNLOCK;
		1409	break;
		1410	}
		1411
		1412	/* free this only after the transfer */
		1413	prev_sv = SvRV (coro_current);
		1414	ta->prev = SvSTATE (prev_sv);
		1415	TRANSFER_CHECK (*ta);
		1416	assert (ta->next->flags & CF_READY);
		1417	ta->next->flags &= ~CF_READY;
		1418	SvRV_set (coro_current, next_sv);
915		1419
916	LOCK;	1420	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
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	free_coro_mortal ();	1421	free_coro_mortal (aTHX);
951	coro_mortal = prev;	1422	coro_mortal = prev_sv;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;	1423	UNLOCK;
958	}	1424	}
959		1425
960	static void	1426	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1427	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1428	{
963	LOCK;	1429	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1430	prepare_schedule (aTHX_ ta);
		1431	}
		1432
		1433	static int
		1434	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1435	{
		1436	if (coro_nready)
		1437	{
		1438	SV *prev = SvRV (coro_current);
		1439	prepare_schedule (aTHX_ ta);
		1440	api_ready (prev);
		1441	return 1;
		1442	}
		1443	else
		1444	return 0;
968	}	1445	}
969		1446
970	static void	1447	static void
971	api_schedule (void)	1448	api_schedule (void)
972	{	1449	{
973	dTHX;	1450	dTHX;
974	struct transfer_args ta;	1451	struct transfer_args ta;
975		1452
976	prepare_schedule (&ta);	1453	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1454	TRANSFER (ta);
978	}	1455	}
979		1456
980	static void	1457	static int
981	api_cede (void)	1458	api_cede (void)
982	{	1459	{
983	dTHX;	1460	dTHX;
984	struct transfer_args ta;	1461	struct transfer_args ta;
985		1462
986	prepare_cede (&ta);	1463	prepare_cede (aTHX_ &ta);
		1464
		1465	if (expect_true (ta.prev != ta.next))
		1466	{
987	TRANSFER (ta);	1467	TRANSFER (ta);
		1468	return 1;
		1469	}
		1470	else
		1471	return 0;
988	}	1472	}
989		1473
		1474	static int
		1475	api_cede_notself (void)
		1476	{
		1477	dTHX;
		1478	struct transfer_args ta;
		1479
		1480	if (prepare_cede_notself (aTHX_ &ta))
		1481	{
		1482	TRANSFER (ta);
		1483	return 1;
		1484	}
		1485	else
		1486	return 0;
		1487	}
		1488
		1489	static void
		1490	api_trace (SV *coro_sv, int flags)
		1491	{
		1492	dTHX;
		1493	struct coro *coro = SvSTATE (coro_sv);
		1494
		1495	if (flags & CC_TRACE)
		1496	{
		1497	if (!coro->cctx)
		1498	coro->cctx = cctx_new ();
		1499	else if (!(coro->cctx->flags & CC_TRACE))
		1500	croak ("cannot enable tracing on coroutine with custom stack");
		1501
		1502	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1503	}
		1504	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1505	{
		1506	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1507
		1508	if (coro->flags & CF_RUNNING)
		1509	PL_runops = RUNOPS_DEFAULT;
		1510	else
		1511	coro->slot->runops = RUNOPS_DEFAULT;
		1512	}
		1513	}
		1514
990	MODULE = Coro::State PACKAGE = Coro::State	1515	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1516
992	PROTOTYPES: DISABLE	1517	PROTOTYPES: DISABLE
993		1518
994	BOOT:	1519	BOOT:
995	{	1520	{
996	#ifdef USE_ITHREADS	1521	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1522	MUTEX_INIT (&coro_mutex);
998	#endif	1523	#endif
999	BOOT_PAGESIZE;	1524	BOOT_PAGESIZE;
1000		1525
		1526	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1527	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1528
		1529	hv_sig = coro_get_hv ("SIG", TRUE);
		1530	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1531	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1532
		1533	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1534	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1535
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1536	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1537
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1538	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1539	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1540	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1541	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1542
1007	main_mainstack = PL_mainstack;	1543	main_mainstack = PL_mainstack;
		1544	main_top_env = PL_top_env;
		1545
		1546	while (main_top_env->je_prev)
		1547	main_top_env = main_top_env->je_prev;
1008		1548
1009	coroapi.ver = CORO_API_VERSION;	1549	coroapi.ver = CORO_API_VERSION;
		1550	coroapi.rev = CORO_API_REVISION;
1010	coroapi.transfer = api_transfer;	1551	coroapi.transfer = api_transfer;
1011
1012	Newz (0, main_stack, 1, coro_stack);
1013	main_stack->idle_sp = (void *)-1;
1014		1552
1015	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1553	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1016	}	1554	}
1017		1555
1018	SV *	1556	SV *
…		…
1022	struct coro *coro;	1560	struct coro *coro;
1023	HV *hv;	1561	HV *hv;
1024	int i;	1562	int i;
1025		1563
1026	Newz (0, coro, 1, struct coro);	1564	Newz (0, coro, 1, struct coro);
1027	coro->args = newAV ();	1565	coro->args = newAV ();
		1566	coro->flags = CF_NEW;
1028		1567
		1568	if (coro_first) coro_first->prev = coro;
		1569	coro->next = coro_first;
		1570	coro_first = coro;
		1571
1029	hv = newHV ();	1572	coro->hv = hv = newHV ();
1030	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1573	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1031	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1574	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032		1575
		1576	av_extend (coro->args, items - 1);
1033	for (i = 1; i < items; i++)	1577	for (i = 1; i < items; i++)
1034	av_push (coro->args, newSVsv (ST (i)));	1578	av_push (coro->args, newSVsv (ST (i)));
1035
1036	coro->stack = main_stack;
1037	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1038	/*coro->stack = 0;*/
1039	}	1579	}
1040	OUTPUT:	1580	OUTPUT:
1041	RETVAL	1581	RETVAL
1042		1582
		1583	# these not obviously related functions are all rolled into the same xs
		1584	# function to increase chances that they all will call transfer with the same
		1585	# stack offset
1043	void	1586	void
1044	_set_stacklevel (...)	1587	_set_stacklevel (...)
1045	ALIAS:	1588	ALIAS:
1046	Coro::State::transfer = 1	1589	Coro::State::transfer = 1
1047	Coro::schedule = 2	1590	Coro::schedule = 2
1048	Coro::cede = 3	1591	Coro::cede = 3
1049	Coro::Cont::yield = 4	1592	Coro::cede_notself = 4
1050	CODE:	1593	CODE:
1051	{	1594	{
1052	struct transfer_args ta;	1595	struct transfer_args ta;
1053		1596
1054	switch (ix)	1597	switch (ix)
1055	{	1598	{
1056	case 0:	1599	case 0:
1057	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1600	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1058	ta.next = 0;	1601	ta.next = 0;
1059	ta.flags = TRANSFER_SET_STACKLEVEL;
1060	break;	1602	break;
1061		1603
1062	case 1:	1604	case 1:
1063	if (items != 3)	1605	if (items != 2)
1064	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1606	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1065		1607
1066	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1608	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1067	break;	1609	break;
1068		1610
1069	case 2:	1611	case 2:
1070	prepare_schedule (&ta);	1612	prepare_schedule (aTHX_ &ta);
1071	break;	1613	break;
1072		1614
1073	case 3:	1615	case 3:
1074	prepare_cede (&ta);	1616	prepare_cede (aTHX_ &ta);
1075	break;	1617	break;
1076		1618
1077	case 4:	1619	case 4:
1078	{	1620	if (!prepare_cede_notself (aTHX_ &ta))
1079	SV *yieldstack;	1621	XSRETURN_EMPTY;
1080	SV *sv;
1081	AV *defav = GvAV (PL_defgv);
1082		1622
1083	yieldstack = *hv_fetch (
1084	(HV *)SvRV (GvSV (coro_current)),
1085	"yieldstack", sizeof ("yieldstack") - 1,
1086	0
1087	);
1088
1089	/* set up @_ -- ugly */
1090	av_clear (defav);
1091	av_fill (defav, items - 1);
1092	while (items--)
1093	av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095	sv = av_pop ((AV *)SvRV (yieldstack));
1096	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098	ta.flags = 0;
1099	SvREFCNT_dec (sv);
1100	}
1101	break;	1623	break;
1102
1103	}	1624	}
1104		1625
		1626	BARRIER;
		1627	PUTBACK;
1105	TRANSFER (ta);	1628	TRANSFER (ta);
		1629	SPAGAIN; /* might be the sp of a different coroutine now */
		1630	/* be extra careful not to ever do anything after TRANSFER */
1106	}	1631	}
1107		1632
1108	void	1633	bool
1109	_clone_state_from (SV *dst, SV *src)	1634	_destroy (SV *coro_sv)
1110	CODE:	1635	CODE:
1111	{	1636	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1112	struct coro *coro_src = SvSTATE (src);	1637	OUTPUT:
1113		1638	RETVAL
1114	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115
1116	++coro_src->refcnt;
1117	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118	}
1119
1120	void
1121	_nonlocal_goto (IV nextop)
1122	CODE:
1123	/* uuh, somebody will kill me again for this */
1124	PL_op->op_next = INT2PTR (OP *, nextop);
1125		1639
1126	void	1640	void
1127	_exit (code)	1641	_exit (code)
1128	int code	1642	int code
1129	PROTOTYPE: $	1643	PROTOTYPE: $
1130	CODE:	1644	CODE:
1131	_exit (code);	1645	_exit (code);
1132		1646
		1647	int
		1648	cctx_stacksize (int new_stacksize = 0)
		1649	CODE:
		1650	RETVAL = coro_stacksize;
		1651	if (new_stacksize)
		1652	coro_stacksize = new_stacksize;
		1653	OUTPUT:
		1654	RETVAL
		1655
		1656	int
		1657	cctx_count ()
		1658	CODE:
		1659	RETVAL = cctx_count;
		1660	OUTPUT:
		1661	RETVAL
		1662
		1663	int
		1664	cctx_idle ()
		1665	CODE:
		1666	RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2];
		1667	OUTPUT:
		1668	RETVAL
		1669
		1670	void
		1671	list ()
		1672	PPCODE:
		1673	{
		1674	struct coro *coro;
		1675	for (coro = coro_first; coro; coro = coro->next)
		1676	if (coro->hv)
		1677	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1678	}
		1679
		1680	void
		1681	call (Coro::State coro, SV *coderef)
		1682	ALIAS:
		1683	eval = 1
		1684	CODE:
		1685	{
		1686	if (coro->mainstack)
		1687	{
		1688	struct coro temp;
		1689
		1690	if (!(coro->flags & CF_RUNNING))
		1691	{
		1692	save_perl (aTHX_ &temp);
		1693	load_perl (aTHX_ coro);
		1694	}
		1695
		1696	{
		1697	dSP;
		1698	ENTER;
		1699	SAVETMPS;
		1700	PUTBACK;
		1701	PUSHSTACK;
		1702	PUSHMARK (SP);
		1703
		1704	if (ix)
		1705	eval_sv (coderef, 0);
		1706	else
		1707	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1708
		1709	POPSTACK;
		1710	FREETMPS;
		1711	LEAVE;
		1712	PUTBACK;
		1713	}
		1714
		1715	if (!(coro->flags & CF_RUNNING))
		1716	{
		1717	save_perl (aTHX_ coro);
		1718	load_perl (aTHX_ &temp);
		1719	}
		1720	}
		1721	}
		1722
		1723	SV *
		1724	is_ready (Coro::State coro)
		1725	PROTOTYPE: $
		1726	ALIAS:
		1727	is_ready = CF_READY
		1728	is_running = CF_RUNNING
		1729	is_new = CF_NEW
		1730	is_destroyed = CF_DESTROYED
		1731	CODE:
		1732	RETVAL = boolSV (coro->flags & ix);
		1733	OUTPUT:
		1734	RETVAL
		1735
		1736	void
		1737	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1738
		1739	SV *
		1740	has_stack (Coro::State coro)
		1741	PROTOTYPE: $
		1742	CODE:
		1743	RETVAL = boolSV (!!coro->cctx);
		1744	OUTPUT:
		1745	RETVAL
		1746
		1747	int
		1748	is_traced (Coro::State coro)
		1749	PROTOTYPE: $
		1750	CODE:
		1751	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1752	OUTPUT:
		1753	RETVAL
		1754
		1755	IV
		1756	rss (Coro::State coro)
		1757	PROTOTYPE: $
		1758	ALIAS:
		1759	usecount = 1
		1760	CODE:
		1761	switch (ix)
		1762	{
		1763	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1764	case 1: RETVAL = coro->usecount; break;
		1765	}
		1766	OUTPUT:
		1767	RETVAL
		1768
		1769
1133	MODULE = Coro::State PACKAGE = Coro	1770	MODULE = Coro::State PACKAGE = Coro
1134		1771
1135	BOOT:	1772	BOOT:
1136	{	1773	{
1137	int i;	1774	int i;
1138		1775
		1776	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1777	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1778	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1779
		1780	coro_current = coro_get_sv ("Coro::current", FALSE);
		1781	SvREADONLY_on (coro_current);
		1782
1139	coro_stash = gv_stashpv ("Coro", TRUE);	1783	coro_stash = gv_stashpv ("Coro", TRUE);
1140		1784
1141	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1785	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1142	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1786	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1143	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1787	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1144	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1788	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1145	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1789	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1146	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1790	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1147		1791
1148	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1149	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1150
1151	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1792	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152	coro_ready[i] = newAV ();	1793	coro_ready[i] = newAV ();
1153		1794
1154	{	1795	{
1155	SV *sv = perl_get_sv("Coro::API", 1);	1796	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1797	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1156		1798
1157	coroapi.schedule = api_schedule;	1799	coroapi.schedule = api_schedule;
1158	coroapi.cede = api_cede;	1800	coroapi.cede = api_cede;
		1801	coroapi.cede_notself = api_cede_notself;
1159	coroapi.ready = api_ready;	1802	coroapi.ready = api_ready;
		1803	coroapi.is_ready = api_is_ready;
1160	coroapi.nready = &coro_nready;	1804	coroapi.nready = &coro_nready;
1161	coroapi.current = coro_current;	1805	coroapi.current = coro_current;
1162		1806
1163	GCoroAPI = &coroapi;	1807	GCoroAPI = &coroapi;
1164	sv_setiv (sv, (IV)&coroapi);	1808	sv_setiv (sv, (IV)&coroapi);
1165	SvREADONLY_on (sv);	1809	SvREADONLY_on (sv);
1166	}	1810	}
1167	}	1811	}
		1812
		1813	void
		1814	_set_current (SV *current)
		1815	PROTOTYPE: $
		1816	CODE:
		1817	SvREFCNT_dec (SvRV (coro_current));
		1818	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1168		1819
1169	int	1820	int
1170	prio (Coro::State coro, int newprio = 0)	1821	prio (Coro::State coro, int newprio = 0)
1171	ALIAS:	1822	ALIAS:
1172	nice = 1	1823	nice = 1
…		…
1175	RETVAL = coro->prio;	1826	RETVAL = coro->prio;
1176		1827
1177	if (items > 1)	1828	if (items > 1)
1178	{	1829	{
1179	if (ix)	1830	if (ix)
1180	newprio += coro->prio;	1831	newprio = coro->prio - newprio;
1181		1832
1182	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1833	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1183	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1834	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1184		1835
1185	coro->prio = newprio;	1836	coro->prio = newprio;
1186	}	1837	}
1187	}	1838	}
		1839	OUTPUT:
		1840	RETVAL
1188		1841
1189	void	1842	SV *
1190	ready (SV *self)	1843	ready (SV *self)
1191	PROTOTYPE: $	1844	PROTOTYPE: $
1192	CODE:	1845	CODE:
1193	api_ready (self);	1846	RETVAL = boolSV (api_ready (self));
		1847	OUTPUT:
		1848	RETVAL
1194		1849
1195	int	1850	int
1196	nready (...)	1851	nready (...)
1197	PROTOTYPE:	1852	PROTOTYPE:
1198	CODE:	1853	CODE:
1199	RETVAL = coro_nready;	1854	RETVAL = coro_nready;
1200	OUTPUT:	1855	OUTPUT:
1201	RETVAL	1856	RETVAL
1202		1857
		1858	void
		1859	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1860	PROTOTYPE: $;$
		1861	CODE:
		1862	SvREFCNT_dec (self->throw);
		1863	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1864
		1865	# for async_pool speedup
		1866	void
		1867	_pool_1 (SV *cb)
		1868	CODE:
		1869	{
		1870	struct coro *coro = SvSTATE (coro_current);
		1871	HV *hv = (HV *)SvRV (coro_current);
		1872	AV *defav = GvAV (PL_defgv);
		1873	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1874	AV *invoke_av;
		1875	int i, len;
		1876
		1877	if (!invoke)
		1878	croak ("\3async_pool terminate\2\n");
		1879
		1880	SvREFCNT_dec (coro->saved_deffh);
		1881	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1882
		1883	hv_store (hv, "desc", sizeof ("desc") - 1,
		1884	newSVpvn (strpair ("[async_pool]")), 0);
		1885
		1886	invoke_av = (AV *)SvRV (invoke);
		1887	len = av_len (invoke_av);
		1888
		1889	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1890
		1891	if (len > 0)
		1892	{
		1893	av_fill (defav, len - 1);
		1894	for (i = 0; i < len; ++i)
		1895	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1896	}
		1897
		1898	SvREFCNT_dec (invoke);
		1899	}
		1900
		1901	void
		1902	_pool_2 (SV *cb)
		1903	CODE:
		1904	{
		1905	struct coro *coro = SvSTATE (coro_current);
		1906
		1907	sv_setsv (cb, &PL_sv_undef);
		1908
		1909	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1910	coro->saved_deffh = 0;
		1911
		1912	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1913	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1914	croak ("\3async_pool terminate\2\n");
		1915
		1916	av_clear (GvAV (PL_defgv));
		1917	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1918	newSVpvn (strpair ("[async_pool idle]")), 0);
		1919
		1920	coro->prio = 0;
		1921
		1922	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1923	api_trace (coro_current, 0);
		1924
		1925	av_push (av_async_pool, newSVsv (coro_current));
		1926	}
		1927
		1928
1203	MODULE = Coro::State PACKAGE = Coro::AIO	1929	MODULE = Coro::State PACKAGE = Coro::AIO
1204		1930
1205	SV *	1931	SV *
1206	_get_state ()	1932	_get_state ()
1207	CODE:	1933	CODE:
1208	{	1934	{
1209	struct {	1935	struct io_state *data;
1210	int errorno;
1211	int laststype;
1212	int laststatval;
1213	Stat_t statcache;
1214	} data;
1215		1936
		1937	RETVAL = newSV (sizeof (struct io_state));
		1938	data = (struct io_state *)SvPVX (RETVAL);
		1939	SvCUR_set (RETVAL, sizeof (struct io_state));
		1940	SvPOK_only (RETVAL);
		1941
1216	data.errorno = errno;	1942	data->errorno = errno;
1217	data.laststype = PL_laststype;	1943	data->laststype = PL_laststype;
1218	data.laststatval = PL_laststatval;	1944	data->laststatval = PL_laststatval;
1219	data.statcache = PL_statcache;	1945	data->statcache = PL_statcache;
1220
1221	RETVAL = newSVpvn ((char *)&data, sizeof data);
1222	}	1946	}
1223	OUTPUT:	1947	OUTPUT:
1224	RETVAL	1948	RETVAL
1225		1949
1226	void	1950	void
1227	_set_state (char *data_)	1951	_set_state (char *data_)
1228	PROTOTYPE: $	1952	PROTOTYPE: $
1229	CODE:	1953	CODE:
1230	{	1954	{
1231	struct {	1955	struct io_state *data = (void *)data_;
1232	int errorno;
1233	int laststype;
1234	int laststatval;
1235	Stat_t statcache;
1236	} *data = (void *)data_;
1237		1956
1238	errno = data->errorno;	1957	errno = data->errorno;
1239	PL_laststype = data->laststype;	1958	PL_laststype = data->laststype;
1240	PL_laststatval = data->laststatval;	1959	PL_laststatval = data->laststatval;
1241	PL_statcache = data->statcache;	1960	PL_statcache = data->statcache;
1242	}	1961	}
		1962

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