ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC vs.
Revision 1.218 by root, Mon Dec 3 00:41:45 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	12	#include <stdio.h>
41	#include <errno.h>	13	#include <errno.h>
42		14	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	15	#include <inttypes.h> /* portable stdint.h */
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		16
51	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
52	# include <unistd.h>	18	# include <unistd.h>
53	# include <sys/mman.h>	19	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
69	#else	35	#else
70	# define PAGESIZE 0	36	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
72	#endif	38	#endif
73		39
74	/* The next macro should declare a variable stacklevel that contains and approximation	40	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	41	# include <valgrind/valgrind.h>
76	* and should be unique. */	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)
		57	# ifndef PL_ppaddr
		58	# define PL_ppaddr ppaddr
		59	# endif
		60	# ifndef call_sv
		61	# define call_sv perl_call_sv
		62	# endif
		63	# ifndef get_sv
		64	# define get_sv perl_get_sv
		65	# endif
		66	# ifndef get_cv
		67	# define get_cv perl_get_cv
		68	# endif
		69	# ifndef IS_PADGV
		70	# define IS_PADGV(v) 0
		71	# endif
		72	# ifndef IS_PADCONST
		73	# define IS_PADCONST(v) 0
		74	# endif
		75	#endif
		76
		77	/* 5.8.7 */
		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
		89
		90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		91	# undef CORO_STACKGUARD
		92	#endif
		93
		94	#ifndef CORO_STACKGUARD
		95	# define CORO_STACKGUARD 0
		96	#endif
		97
		98	/* prefer perl internal functions over our own? */
		99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		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. */
77	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
79		107
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		109
82	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
83	# 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))
84	#else	114	#else
85	# define attribute(x)	115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
86	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
87		122
88	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
89		124
90	#include "CoroAPI.h"	125	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		126
94	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	131	#else
99	# define LOCK (void)0	132	# define LOCK (void)0
100	# define UNLOCK (void)0	133	# define UNLOCK (void)0
101	#endif	134	#endif
102		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;
103	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
104	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;
105	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
106	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	};
107		174
108	/* this is a structure representing a c-level coroutine */	175	/* this is a structure representing a c-level coroutine */
109	typedef struct coro_cctx {	176	typedef struct coro_cctx {
110	struct coro_cctx *next;	177	struct coro_cctx *next;
111		178
112	/* the stack */	179	/* the stack */
113	void *sptr;	180	void *sptr;
114	long ssize; /* positive == mmap, otherwise malloc */	181	size_t ssize;
115		182
116	/* cpu state */	183	/* cpu state */
117	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 */
118	JMPENV *top_env;	186	JMPENV *top_env;
119	coro_context cctx;	187	coro_context cctx;
120		188
121	#if USE_VALGRIND	189	#if CORO_USE_VALGRIND
122	int valgrind_id;	190	int valgrind_id;
123	#endif	191	#endif
		192	unsigned char flags;
124	} coro_cctx;	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))
125		214
126	/* this is a structure representing a perl-level coroutine */	215	/* this is a structure representing a perl-level coroutine */
127	struct coro {	216	struct coro {
128	/* the c coroutine allocated to this perl coroutine, if any */	217	/* the c coroutine allocated to this perl coroutine, if any */
129	coro_cctx *cctx;	218	coro_cctx *cctx;
130		219
131	/* data associated with this coroutine (initial args) */	220	/* process data */
132	AV *args;
133	int refcnt;
134
135	/* optionally saved, might be zero */
136	AV *defav;
137	SV *defsv;
138	SV *errsv;
139
140	/* saved global state not related to stacks */
141	U8 dowarn;
142	I32 in_eval;
143
144	/* the stacks and related info (callchain etc..) */
145	PERL_SI *curstackinfo;
146	AV *curstack;
147	AV *mainstack;	221	AV *mainstack;
148	SV **stack_sp;	222	perl_slots *slot; /* basically the saved sp */
149	OP *op;	223
150	SV **curpad;	224	AV *args; /* data associated with this coroutine (initial args) */
151	AV *comppad;	225	int refcnt; /* coroutines are refcounted, yes */
152	CV *compcv;	226	int flags; /* CF_ flags */
153	SV **stack_base;	227	HV *hv; /* the perl hash associated with this coro, if any */
154	SV **stack_max;	228
155	SV **tmps_stack;	229	/* statistics */
156	I32 tmps_floor;	230	int usecount; /* number of transfers to this coro */
157	I32 tmps_ix;
158	I32 tmps_max;
159	I32 *markstack;
160	I32 *markstack_ptr;
161	I32 *markstack_max;
162	I32 *scopestack;
163	I32 scopestack_ix;
164	I32 scopestack_max;
165	ANY *savestack;
166	I32 savestack_ix;
167	I32 savestack_max;
168	OP **retstack;
169	I32 retstack_ix;
170	I32 retstack_max;
171	PMOP *curpm;
172	COP *curcop;
173		231
174	/* coro process data */	232	/* coro process data */
175	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;
176	};	241	};
177		242
178	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
179	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
180		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
181	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 *
182	coro_clone_padlist (CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
183	{	295	{
184	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
185	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
186		298
187	newpadlist = newAV ();	299	newpadlist = newAV ();
…		…
199		311
200	return newpadlist;	312	return newpadlist;
201	}	313	}
202		314
203	static void	315	static void
204	free_padlist (AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
205	{	317	{
206	/* may be during global destruction */	318	/* may be during global destruction */
207	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
208	{	320	{
209	I32 i = AvFILLp (padlist);	321	I32 i = AvFILLp (padlist);
…		…
230	AV *padlist;	342	AV *padlist;
231	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
232		344
233	/* casting is fun. */	345	/* casting is fun. */
234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
235	free_padlist (padlist);	347	free_padlist (aTHX_ padlist);
236
237	SvREFCNT_dec (av);
238		348
239	return 0;	349	return 0;
240	}	350	}
241		351
242	#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
243		354
244	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))
245		395
246	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
247	static void	397	static void
248	get_padlist (CV *cv)	398	get_padlist (pTHX_ CV *cv)
249	{	399	{
250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
		401	AV *av;
251		402
252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
254	else	405	else
255	{	406	{
256	#if 0	407	#if CORO_PREFER_PERL_FUNCTIONS
257	/* this is probably cleaner, but also slower? */	408	/* this is probably cleaner, but also slower? */
258	CV *cp = Perl_cv_clone (cv);	409	CV *cp = Perl_cv_clone (cv);
259	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
260	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
261	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
262	#else	413	#else
263	CvPADLIST (cv) = coro_clone_padlist (cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
264	#endif	415	#endif
265	}	416	}
266	}	417	}
267		418
268	static void	419	static void
269	put_padlist (CV *cv)	420	put_padlist (pTHX_ CV *cv)
270	{	421	{
271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
		423	AV *av;
272		424
273	if (!mg)	425	if (expect_false (!mg))
274	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
275	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277	mg->mg_virtual = &vtbl_coro;
278	mg->mg_obj = (SV *)newAV ();
279	}
280		427
281	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	428	av = (AV *)mg->mg_obj;
282	}
283		429
284	#define SB do {	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
285	#define SE } while (0)	431	av_extend (av, AvMAX (av) + 1);
286		432
287	#define LOAD(state) load_state((state));	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
288	#define SAVE(state,flags) save_state((state),(flags));	434	}
289		435
290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	436	/** load & save, init *******************************************************/
291		437
292	static void	438	static void
293	load_state(Coro__State c)	439	load_perl (pTHX_ Coro__State c)
294	{	440	{
295	PL_dowarn = c->dowarn;	441	perl_slots *slot = c->slot;
296	PL_in_eval = c->in_eval;	442	c->slot = 0;
297		443
298	PL_curstackinfo = c->curstackinfo;
299	PL_curstack = c->curstack;
300	PL_mainstack = c->mainstack;	444	PL_mainstack = c->mainstack;
301	PL_stack_sp = c->stack_sp;
302	PL_op = c->op;
303	PL_curpad = c->curpad;
304	PL_comppad = c->comppad;
305	PL_compcv = c->compcv;
306	PL_stack_base = c->stack_base;
307	PL_stack_max = c->stack_max;
308	PL_tmps_stack = c->tmps_stack;
309	PL_tmps_floor = c->tmps_floor;
310	PL_tmps_ix = c->tmps_ix;
311	PL_tmps_max = c->tmps_max;
312	PL_markstack = c->markstack;
313	PL_markstack_ptr = c->markstack_ptr;
314	PL_markstack_max = c->markstack_max;
315	PL_scopestack = c->scopestack;
316	PL_scopestack_ix = c->scopestack_ix;
317	PL_scopestack_max = c->scopestack_max;
318	PL_savestack = c->savestack;
319	PL_savestack_ix = c->savestack_ix;
320	PL_savestack_max = c->savestack_max;
321	#if !PERL_VERSION_ATLEAST (5,9,0)
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	#endif
326	PL_curpm = c->curpm;
327	PL_curcop = c->curcop;
328		445
329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	446	GvSV (PL_defgv) = slot->defsv;
330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	447	GvAV (PL_defgv) = slot->defav;
331	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
332		454
333	{	455	{
334	dSP;	456	dSP;
		457
335	CV *cv;	458	CV *cv;
336		459
337	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
338	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
339	{	462	{
340	AV *padlist = (AV *)POPs;
341
342	if (padlist)
343	{
344	put_padlist (cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
345	CvPADLIST(cv) = padlist;	464	CvDEPTH (cv) = PTR2IV (POPs);
346	}	465	CvPADLIST (cv) = (AV *)POPs;
347
348	++CvDEPTH(cv);
349	}	466	}
350		467
351	PUTBACK;	468	PUTBACK;
352	}	469	}
353	}	470	}
354		471
355	static void	472	static void
356	save_state(Coro__State c, int flags)	473	save_perl (pTHX_ Coro__State c)
357	{	474	{
358	{	475	{
359	dSP;	476	dSP;
360	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
361	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
364	/*	481	/*
365	* 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
366	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
367	*/	484	*/
368		485
369	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
370	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
371	for (;;)	488	for (;;)
372	{	489	{
373	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
374	{	491	{
375	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
376		493
377	if (CxTYPE(cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
378	{	495	{
379	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
		497
380	if (CvDEPTH(cv))	498	if (expect_true (CvDEPTH (cv)))
381	{	499	{
382	EXTEND (SP, CvDEPTH(cv)*2);	500	EXTEND (SP, 3);
383
384	while (--CvDEPTH(cv))
385	{
386	/* this tells the restore code to increment CvDEPTH */
387	PUSHs (Nullsv);
388	PUSHs ((SV *)cv);
389	}
390
391	PUSHs ((SV *)CvPADLIST(cv));	501	PUSHs ((SV *)CvPADLIST (cv));
		502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
392	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
393		504
		505	CvDEPTH (cv) = 0;
394	get_padlist (cv);	506	get_padlist (aTHX_ cv);
395	}	507	}
396	}	508	}
397	#ifdef CXt_FORMAT
398	else if (CxTYPE(cx) == CXt_FORMAT)
399	{
400	/* I never used formats, so how should I know how these are implemented? */
401	/* my bold guess is as a simple, plain sub... */
402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403	}
404	#endif
405	}	509	}
406		510
407	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
408	break;	512	break;
409		513
410	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
411	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
412	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
413	}	517	}
414		518
415	PUTBACK;	519	PUTBACK;
416	}	520	}
417		521
418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
420	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 */
421		533
422	c->dowarn = PL_dowarn;
423	c->in_eval = PL_in_eval;
424
425	c->curstackinfo = PL_curstackinfo;
426	c->curstack = PL_curstack;
427	c->mainstack = PL_mainstack;	534	c->mainstack = PL_mainstack;
428	c->stack_sp = PL_stack_sp;	535
429	c->op = PL_op;	536	{
430	c->curpad = PL_curpad;	537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
431	c->comppad = PL_comppad;	538
432	c->compcv = PL_compcv;	539	slot->defav = GvAV (PL_defgv);
433	c->stack_base = PL_stack_base;	540	slot->defsv = DEFSV;
434	c->stack_max = PL_stack_max;	541	slot->errsv = ERRSV;
435	c->tmps_stack = PL_tmps_stack;	542	slot->irsgv = GvSV (irsgv);
436	c->tmps_floor = PL_tmps_floor;	543
437	c->tmps_ix = PL_tmps_ix;	544	#define VAR(name,type) slot->name = PL_ ## name;
438	c->tmps_max = PL_tmps_max;	545	# include "state.h"
439	c->markstack = PL_markstack;	546	#undef VAR
440	c->markstack_ptr = PL_markstack_ptr;	547	}
441	c->markstack_max = PL_markstack_max;
442	c->scopestack = PL_scopestack;
443	c->scopestack_ix = PL_scopestack_ix;
444	c->scopestack_max = PL_scopestack_max;
445	c->savestack = PL_savestack;
446	c->savestack_ix = PL_savestack_ix;
447	c->savestack_max = PL_savestack_max;
448	#if !PERL_VERSION_ATLEAST (5,9,0)
449	c->retstack = PL_retstack;
450	c->retstack_ix = PL_retstack_ix;
451	c->retstack_max = PL_retstack_max;
452	#endif
453	c->curpm = PL_curpm;
454	c->curcop = PL_curcop;
455	}	548	}
456		549
457	/*	550	/*
458	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
459	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
460	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
461	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
462	*/	555	*/
		556	#if CORO_PREFER_PERL_FUNCTIONS
		557	# define coro_init_stacks init_stacks
		558	#else
463	static void	559	static void
464	coro_init_stacks ()	560	coro_init_stacks (pTHX)
465	{	561	{
466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	562	PL_curstackinfo = new_stackinfo(32, 8);
467	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
468	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
470		566
471	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
472	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
473	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
474		570
475	New(50,PL_tmps_stack,96,SV*);	571	New(50,PL_tmps_stack,32,SV*);
476	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
477	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
478	PL_tmps_max = 96;	574	PL_tmps_max = 32;
479		575
480	New(54,PL_markstack,16,I32);	576	New(54,PL_markstack,16,I32);
481	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
482	PL_markstack_max = PL_markstack + 16;	578	PL_markstack_max = PL_markstack + 16;
483		579
484	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
485	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
486	#endif	582	#endif
487		583
488	New(54,PL_scopestack,16,I32);	584	New(54,PL_scopestack,8,I32);
489	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
490	PL_scopestack_max = 16;	586	PL_scopestack_max = 8;
491		587
492	New(54,PL_savestack,96,ANY);	588	New(54,PL_savestack,24,ANY);
493	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
494	PL_savestack_max = 96;	590	PL_savestack_max = 24;
495		591
496	#if !PERL_VERSION_ATLEAST (5,9,0)	592	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	593	New(54,PL_retstack,4,OP*);
498	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	595	PL_retstack_max = 4;
500	#endif	596	#endif
501	}	597	}
		598	#endif
502		599
503	/*	600	/*
504	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
505	*/	602	*/
506	static void	603	static void
507	coro_destroy_stacks ()	604	coro_destroy_stacks (pTHX)
508	{	605	{
509	if (!IN_DESTRUCT)
510	{
511	/* is this ugly, I ask? */
512	LEAVE_SCOPE (0);
513
514	/* sure it is, but more important: is it correct?? :/ */
515	FREETMPS;
516
517	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
518	}
519
520	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
521	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
522		608
523	while (PL_curstackinfo)	609	while (PL_curstackinfo)
524	{	610	{
525	PERL_SI *p = PL_curstackinfo->si_prev;	611	PERL_SI *p = PL_curstackinfo->si_prev;
526		612
527	{ /*D*//*remove*/
528	dSP;
529	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
530	PUTBACK; /* possibly superfluous */
531	}
532
533	if (!IN_DESTRUCT)	613	if (!IN_DESTRUCT)
534	{
535	dounwind (-1);/*D*//*remove*/
536	SvREFCNT_dec (PL_curstackinfo->si_stack);	614	SvREFCNT_dec (PL_curstackinfo->si_stack);
537	}
538		615
539	Safefree (PL_curstackinfo->si_cxstack);	616	Safefree (PL_curstackinfo->si_cxstack);
540	Safefree (PL_curstackinfo);	617	Safefree (PL_curstackinfo);
541	PL_curstackinfo = p;	618	PL_curstackinfo = p;
542	}	619	}
…		…
548	#if !PERL_VERSION_ATLEAST (5,9,0)	625	#if !PERL_VERSION_ATLEAST (5,9,0)
549	Safefree (PL_retstack);	626	Safefree (PL_retstack);
550	#endif	627	#endif
551	}	628	}
552		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	#if 0
		670	static int (*orig_sigelem_get) (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	*/
553	static void	681	static int
554	setup_coro (struct coro *coro)	682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	return orig_sigelem_get (aTHX_ sv, mg);
		685	const char *s = MgPV_nolen_const (mg);
		686
		687	if (*s == '_')
		688	{
		689	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		690	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		691	}
		692
		693	return orig_sigelem_get (aTHX_ sv, mg);
		694	}
		695	#endif
		696
		697	static void
		698	coro_setup (pTHX_ struct coro *coro)
555	{	699	{
556	/*	700	/*
557	* emulate part of the perl startup here.	701	* emulate part of the perl startup here.
558	*/	702	*/
559
560	coro_init_stacks ();	703	coro_init_stacks (aTHX);
561		704
		705	PL_runops = RUNOPS_DEFAULT;
		706	PL_curcop = &PL_compiling;
		707	PL_in_eval = EVAL_NULL;
562	PL_curcop = 0;	708	PL_comppad = 0;
563	PL_in_eval = 0;
564	PL_curpm = 0;	709	PL_curpm = 0;
		710	PL_curpad = 0;
		711	PL_localizing = 0;
		712	PL_dirty = 0;
		713	PL_restartop = 0;
		714
		715	/* recreate the die/warn hooks */
		716	PL_diehook = 0;
		717	hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
		718	PL_diehook = SvREFCNT_inc (rv_diehook);
		719
		720	PL_warnhook = 0;
		721	hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
		722	PL_warnhook = SvREFCNT_inc (rv_warnhook);
		723
		724	GvSV (PL_defgv) = newSV (0);
		725	GvAV (PL_defgv) = coro->args; coro->args = 0;
		726	GvSV (PL_errgv) = newSV (0);
		727	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		728	PL_rs = newSVsv (GvSV (irsgv));
		729	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
565		730
566	{	731	{
567	dSP;	732	dSP;
568	LOGOP myop;	733	LOGOP myop;
569		734
570	/* I have no idea why this is needed, but it is */
571	PUSHMARK (SP);
572
573	SvREFCNT_dec (GvAV (PL_defgv));
574	GvAV (PL_defgv) = coro->args; coro->args = 0;
575
576	Zero (&myop, 1, LOGOP);	735	Zero (&myop, 1, LOGOP);
577	myop.op_next = Nullop;	736	myop.op_next = Nullop;
578	myop.op_flags = OPf_WANT_VOID;	737	myop.op_flags = OPf_WANT_VOID;
579		738
		739	PUSHMARK (SP);
		740	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		741	PUTBACK;
580	PL_op = (OP *)&myop;	742	PL_op = (OP *)&myop;
581
582	PUSHMARK (SP);
583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
584	PUTBACK;
585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	743	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
586	SPAGAIN;	744	SPAGAIN;
587
588	ENTER; /* necessary e.g. for dounwind */
589	}	745	}
590	}
591		746
		747	/* this newly created coroutine might be run on an existing cctx which most
		748	* likely was suspended in set_stacklevel, called from entersub.
		749	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		750	* so we ENTER here for symmetry
		751	*/
		752	ENTER;
		753	}
		754
592	static void	755	static void
		756	coro_destroy (pTHX_ struct coro *coro)
		757	{
		758	if (!IN_DESTRUCT)
		759	{
		760	/* restore all saved variables and stuff */
		761	LEAVE_SCOPE (0);
		762	assert (PL_tmps_floor == -1);
		763
		764	/* free all temporaries */
		765	FREETMPS;
		766	assert (PL_tmps_ix == -1);
		767
		768	/* unwind all extra stacks */
		769	POPSTACK_TO (PL_mainstack);
		770
		771	/* unwind main stack */
		772	dounwind (-1);
		773	}
		774
		775	SvREFCNT_dec (GvSV (PL_defgv));
		776	SvREFCNT_dec (GvAV (PL_defgv));
		777	SvREFCNT_dec (GvSV (PL_errgv));
		778	SvREFCNT_dec (PL_defoutgv);
		779	SvREFCNT_dec (PL_rs);
		780	SvREFCNT_dec (GvSV (irsgv));
		781
		782	SvREFCNT_dec (PL_diehook);
		783	SvREFCNT_dec (PL_warnhook);
		784
		785	SvREFCNT_dec (coro->saved_deffh);
		786	SvREFCNT_dec (coro->throw);
		787
		788	coro_destroy_stacks (aTHX);
		789	}
		790
		791	static void
593	free_coro_mortal ()	792	free_coro_mortal (pTHX)
594	{	793	{
595	if (coro_mortal)	794	if (expect_true (coro_mortal))
596	{	795	{
597	SvREFCNT_dec (coro_mortal);	796	SvREFCNT_dec (coro_mortal);
598	coro_mortal = 0;	797	coro_mortal = 0;
599	}	798	}
600	}	799	}
601		800
		801	static int
		802	runops_trace (pTHX)
		803	{
		804	COP *oldcop = 0;
		805	int oldcxix = -2;
		806	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		807	coro_cctx *cctx = coro->cctx;
		808
		809	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		810	{
		811	PERL_ASYNC_CHECK ();
		812
		813	if (cctx->flags & CC_TRACE_ALL)
		814	{
		815	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		816	{
		817	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		818	SV **bot, **top;
		819	AV *av = newAV (); /* return values */
		820	SV **cb;
		821	dSP;
		822
		823	GV *gv = CvGV (cx->blk_sub.cv);
		824	SV *fullname = sv_2mortal (newSV (0));
		825	if (isGV (gv))
		826	gv_efullname3 (fullname, gv, 0);
		827
		828	bot = PL_stack_base + cx->blk_oldsp + 1;
		829	top = cx->blk_gimme == G_ARRAY ? SP + 1
		830	: cx->blk_gimme == G_SCALAR ? bot + 1
		831	: bot;
		832
		833	av_extend (av, top - bot);
		834	while (bot < top)
		835	av_push (av, SvREFCNT_inc (*bot++));
		836
		837	PL_runops = RUNOPS_DEFAULT;
		838	ENTER;
		839	SAVETMPS;
		840	EXTEND (SP, 3);
		841	PUSHMARK (SP);
		842	PUSHs (&PL_sv_no);
		843	PUSHs (fullname);
		844	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		845	PUTBACK;
		846	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		847	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		848	SPAGAIN;
		849	FREETMPS;
		850	LEAVE;
		851	PL_runops = runops_trace;
		852	}
		853
		854	if (oldcop != PL_curcop)
		855	{
		856	oldcop = PL_curcop;
		857
		858	if (PL_curcop != &PL_compiling)
		859	{
		860	SV **cb;
		861
		862	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		863	{
		864	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		865
		866	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		867	{
		868	runops_proc_t old_runops = PL_runops;
		869	dSP;
		870	GV *gv = CvGV (cx->blk_sub.cv);
		871	SV *fullname = sv_2mortal (newSV (0));
		872
		873	if (isGV (gv))
		874	gv_efullname3 (fullname, gv, 0);
		875
		876	PL_runops = RUNOPS_DEFAULT;
		877	ENTER;
		878	SAVETMPS;
		879	EXTEND (SP, 3);
		880	PUSHMARK (SP);
		881	PUSHs (&PL_sv_yes);
		882	PUSHs (fullname);
		883	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		884	PUTBACK;
		885	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		886	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		887	SPAGAIN;
		888	FREETMPS;
		889	LEAVE;
		890	PL_runops = runops_trace;
		891	}
		892
		893	oldcxix = cxstack_ix;
		894	}
		895
		896	if (cctx->flags & CC_TRACE_LINE)
		897	{
		898	dSP;
		899
		900	PL_runops = RUNOPS_DEFAULT;
		901	ENTER;
		902	SAVETMPS;
		903	EXTEND (SP, 3);
		904	PL_runops = RUNOPS_DEFAULT;
		905	PUSHMARK (SP);
		906	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		907	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		908	PUTBACK;
		909	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		910	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		911	SPAGAIN;
		912	FREETMPS;
		913	LEAVE;
		914	PL_runops = runops_trace;
		915	}
		916	}
		917	}
		918	}
		919	}
		920
		921	TAINT_NOT;
		922	return 0;
		923	}
		924
		925	/* inject a fake call to Coro::State::_cctx_init into the execution */
		926	/* _cctx_init should be careful, as it could be called at almost any time */
		927	/* during execution of a perl program */
602	static void NOINLINE	928	static void NOINLINE
603	prepare_cctx (coro_cctx *cctx)	929	cctx_prepare (pTHX_ coro_cctx *cctx)
604	{	930	{
605	dSP;	931	dSP;
606	LOGOP myop;	932	LOGOP myop;
607		933
		934	PL_top_env = &PL_start_env;
		935
		936	if (cctx->flags & CC_TRACE)
		937	PL_runops = runops_trace;
		938
608	Zero (&myop, 1, LOGOP);	939	Zero (&myop, 1, LOGOP);
609	myop.op_next = PL_op;	940	myop.op_next = PL_op;
610	myop.op_flags = OPf_WANT_VOID;	941	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
611
612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613		942
614	PUSHMARK (SP);	943	PUSHMARK (SP);
		944	EXTEND (SP, 2);
		945	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	946	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
616	PUTBACK;	947	PUTBACK;
		948	PL_op = (OP *)&myop;
617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	949	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
618	SPAGAIN;	950	SPAGAIN;
619	}	951	}
620		952
		953	/*
		954	* this is a _very_ stripped down perl interpreter ;)
		955	*/
621	static void	956	static void
622	coro_run (void *arg)	957	cctx_run (void *arg)
623	{	958	{
		959	dTHX;
		960
624	/* coro_run is the alternative epilogue of transfer() */	961	/* cctx_run is the alternative tail of transfer(), so unlock here. */
625	UNLOCK;	962	UNLOCK;
626		963
		964	/* we now skip the entersub that lead to transfer() */
		965	PL_op = PL_op->op_next;
		966
		967	/* inject a fake subroutine call to cctx_init */
		968	cctx_prepare (aTHX_ (coro_cctx *)arg);
		969
		970	/* somebody or something will hit me for both perl_run and PL_restartop */
		971	PL_restartop = PL_op;
		972	perl_run (PL_curinterp);
		973
627	/*	974	/*
628	* this is a _very_ stripped down perl interpreter ;)	975	* If perl-run returns we assume exit() was being called or the coro
		976	* fell off the end, which seems to be the only valid (non-bug)
		977	* reason for perl_run to return. We try to exit by jumping to the
		978	* bootstrap-time "top" top_env, as we cannot restore the "main"
		979	* coroutine as Coro has no such concept
629	*/	980	*/
630	PL_top_env = &PL_start_env;	981	PL_top_env = main_top_env;
631	/* inject call to cctx_init */	982	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
632	prepare_cctx ((coro_cctx *)arg);
633
634	/* somebody will hit me for both perl_run and PL_restartop */
635	perl_run (PL_curinterp);
636
637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
638	abort ();
639	}	983	}
640		984
641	static coro_cctx *	985	static coro_cctx *
642	cctx_new ()	986	cctx_new ()
643	{	987	{
644	coro_cctx *cctx;	988	coro_cctx *cctx;
		989	void *stack_start;
		990	size_t stack_size;
645		991
		992	++cctx_count;
		993
646	New (0, cctx, 1, coro_cctx);	994	Newz (0, cctx, 1, coro_cctx);
647		995
648	#if HAVE_MMAP	996	#if HAVE_MMAP
649
650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	997	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
651	/* mmap suppsedly does allocate-on-write for us */	998	/* mmap supposedly does allocate-on-write for us */
652	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	999	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
653		1000
654	if (cctx->sptr == (void *)-1)	1001	if (cctx->sptr != (void *)-1)
655	{
656	perror ("FATAL: unable to mmap stack for coroutine");
657	_exit (EXIT_FAILURE);
658	}	1002	{
659
660	# if STACKGUARD	1003	# if CORO_STACKGUARD
661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1004	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
662	# endif	1005	# endif
		1006	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1007	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1008	cctx->flags |= CC_MAPPED;
		1009	}
		1010	else
		1011	#endif
		1012	{
		1013	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1014	New (0, cctx->sptr, coro_stacksize, long);
663		1015
664	#else
665
666	cctx->ssize = STACKSIZE * (long)sizeof (long);
667	New (0, cctx->sptr, STACKSIZE, long);
668
669	if (!cctx->sptr)	1016	if (!cctx->sptr)
670	{	1017	{
671	perror ("FATAL: unable to malloc stack for coroutine");	1018	perror ("FATAL: unable to allocate stack for coroutine");
672	_exit (EXIT_FAILURE);	1019	_exit (EXIT_FAILURE);
673	}	1020	}
674		1021
675	#endif	1022	stack_start = cctx->sptr;
		1023	stack_size = cctx->ssize;
		1024	}
676		1025
677	#if USE_VALGRIND	1026	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
678	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1027	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
679	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
680	cctx->ssize + (char *)cctx->sptr
681	);
682	#endif
683
684	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
685		1028
686	return cctx;	1029	return cctx;
687	}	1030	}
688		1031
689	static void	1032	static void
690	cctx_free (coro_cctx *cctx)	1033	cctx_destroy (coro_cctx *cctx)
691	{	1034	{
692	if (!cctx)	1035	if (!cctx)
693	return;	1036	return;
694		1037
		1038	--cctx_count;
		1039
695	#if USE_VALGRIND	1040	#if CORO_USE_VALGRIND
696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1041	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697	#endif	1042	#endif
698		1043
699	#if HAVE_MMAP	1044	#if HAVE_MMAP
		1045	if (cctx->flags & CC_MAPPED)
700	munmap (cctx->sptr, cctx->ssize);	1046	munmap (cctx->sptr, cctx->ssize);
701	#else	1047	else
		1048	#endif
702	Safefree (cctx->sptr);	1049	Safefree (cctx->sptr);
703	#endif
704		1050
705	Safefree (cctx);	1051	Safefree (cctx);
706	}	1052	}
707		1053
708	static coro_cctx *cctx_first;	1054	/* wether this cctx should be destructed */
709	static int cctx_count, cctx_idle;	1055	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
710		1056
711	static coro_cctx *	1057	static coro_cctx *
712	cctx_get ()	1058	cctx_get (pTHX)
713	{	1059	{
714	coro_cctx *cctx;	1060	while (expect_true (cctx_first))
715
716	if (cctx_first)
717	{	1061	{
		1062	coro_cctx *cctx = cctx_first;
		1063	cctx_first = cctx->next;
718	--cctx_idle;	1064	--cctx_idle;
719	cctx = cctx_first;	1065
720	cctx_first = cctx->next;	1066	if (expect_true (!CCTX_EXPIRED (cctx)))
721	}	1067	return cctx;
722	else	1068
723	{	1069	cctx_destroy (cctx);
724	++cctx_count;
725	cctx = cctx_new ();
726	PL_op = PL_op->op_next;
727	}	1070	}
728		1071
729	return cctx;	1072	return cctx_new ();
730	}	1073	}
731		1074
732	static void	1075	static void
733	cctx_put (coro_cctx *cctx)	1076	cctx_put (coro_cctx *cctx)
734	{	1077	{
		1078	/* free another cctx if overlimit */
		1079	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1080	{
		1081	coro_cctx *first = cctx_first;
		1082	cctx_first = first->next;
		1083	--cctx_idle;
		1084
		1085	cctx_destroy (first);
		1086	}
		1087
735	++cctx_idle;	1088	++cctx_idle;
736	cctx->next = cctx_first;	1089	cctx->next = cctx_first;
737	cctx_first = cctx;	1090	cctx_first = cctx;
738	}	1091	}
739		1092
740	/* never call directly, always through the coro_state_transfer global variable */	1093	/** coroutine switching *****************************************************/
		1094
		1095	static void
		1096	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1097	{
		1098	if (expect_true (prev != next))
		1099	{
		1100	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1101	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1102
		1103	if (expect_false (next->flags & CF_RUNNING))
		1104	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1105
		1106	if (expect_false (next->flags & CF_DESTROYED))
		1107	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1108
		1109	if (
		1110	#if PERL_VERSION_ATLEAST (5,9,0)
		1111	expect_false (PL_parser)
		1112	#else
		1113	expect_false (PL_lex_state != LEX_NOTPARSING)
		1114	#endif
		1115	)
		1116	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1117	}
		1118	}
		1119
		1120	/* always use the TRANSFER macro */
741	static void NOINLINE	1121	static void NOINLINE
742	transfer (struct coro *prev, struct coro *next, int flags)	1122	transfer (pTHX_ struct coro *prev, struct coro *next)
743	{	1123	{
744	dSTACKLEVEL;	1124	dSTACKLEVEL;
		1125	static volatile int has_throw;
745		1126
746	/* sometimes transfer is only called to set idle_sp */	1127	/* sometimes transfer is only called to set idle_sp */
747	if (flags == TRANSFER_SET_STACKLEVEL)	1128	if (expect_false (!next))
		1129	{
748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1130	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1131	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1132	}
749	else if (prev != next)	1133	else if (expect_true (prev != next))
750	{	1134	{
751	coro_cctx *prev__cctx;	1135	coro_cctx *prev__cctx;
752		1136
		1137	if (expect_false (prev->flags & CF_NEW))
		1138	{
		1139	/* create a new empty context */
		1140	Newz (0, prev->cctx, 1, coro_cctx);
		1141	prev->flags &= ~CF_NEW;
		1142	prev->flags |= CF_RUNNING;
		1143	}
		1144
		1145	prev->flags &= ~CF_RUNNING;
		1146	next->flags |= CF_RUNNING;
		1147
753	LOCK;	1148	LOCK;
754		1149
755	if (next->mainstack)	1150	/* first get rid of the old state */
		1151	save_perl (aTHX_ prev);
		1152
		1153	if (expect_false (next->flags & CF_NEW))
756	{	1154	{
757	/* coroutine already started */	1155	/* need to start coroutine */
758	SAVE (prev, flags);	1156	next->flags &= ~CF_NEW;
759	LOAD (next);	1157	/* setup coroutine call */
		1158	coro_setup (aTHX_ next);
760	}	1159	}
761	else	1160	else
		1161	load_perl (aTHX_ next);
		1162
		1163	prev__cctx = prev->cctx;
		1164
		1165	/* possibly "free" the cctx */
		1166	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
762	{	1167	{
763	/* need to start coroutine */	1168	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
764	/* first get rid of the old state */	1169	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
765	SAVE (prev, -1);	1170
766	/* setup coroutine call */
767	setup_coro (next);
768	/* need a stack */
769	next->cctx = 0;	1171	prev->cctx = 0;
		1172
		1173	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1174	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1175	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1176	if (!next->cctx)
		1177	next->cctx = cctx_get (aTHX);
		1178
		1179	cctx_put (prev__cctx);
770	}	1180	}
771		1181
772	if (!prev->cctx)	1182	++next->usecount;
773	/* create a new empty context */
774	Newz (0, prev->cctx, 1, coro_cctx);
775		1183
776	prev__cctx = prev->cctx;
777
778	/* possibly "free" the cctx */
779	if (prev__cctx->idle_sp == STACKLEVEL)
780	{
781	cctx_put (prev__cctx);
782	prev->cctx = 0;
783	}
784
785	if (!next->cctx)	1184	if (expect_true (!next->cctx))
786	next->cctx = cctx_get ();	1185	next->cctx = cctx_get (aTHX);
787		1186
		1187	has_throw = !!next->throw;
		1188
788	if (prev__cctx != next->cctx)	1189	if (expect_false (prev__cctx != next->cctx))
789	{	1190	{
790	prev__cctx->top_env = PL_top_env;	1191	prev__cctx->top_env = PL_top_env;
791	PL_top_env = next->cctx->top_env;	1192	PL_top_env = next->cctx->top_env;
792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1193	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793	}	1194	}
794		1195
795	free_coro_mortal ();	1196	free_coro_mortal (aTHX);
796
797	UNLOCK;	1197	UNLOCK;
		1198
		1199	if (expect_false (has_throw))
		1200	{
		1201	struct coro *coro = SvSTATE (coro_current);
		1202
		1203	if (coro->throw)
		1204	{
		1205	SV *exception = coro->throw;
		1206	coro->throw = 0;
		1207	sv_setsv (ERRSV, exception);
		1208	croak (0);
		1209	}
		1210	}
798	}	1211	}
799	}	1212	}
800		1213
801	struct transfer_args	1214	struct transfer_args
802	{	1215	{
803	struct coro *prev, *next;	1216	struct coro *prev, *next;
804	int flags;
805	};	1217	};
806		1218
807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1219	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1220	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
808		1221
		1222	/** high level stuff ********************************************************/
		1223
809	static void	1224	static int
810	coro_state_destroy (struct coro *coro)	1225	coro_state_destroy (pTHX_ struct coro *coro)
811	{	1226	{
812	if (coro->refcnt--)	1227	if (coro->flags & CF_DESTROYED)
813	return;	1228	return 0;
		1229
		1230	coro->flags |= CF_DESTROYED;
		1231
		1232	if (coro->flags & CF_READY)
		1233	{
		1234	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1235	/* alternative: look through all ready queues and remove the coro */
		1236	LOCK;
		1237	--coro_nready;
		1238	UNLOCK;
		1239	}
		1240	else
		1241	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
814		1242
815	if (coro->mainstack && coro->mainstack != main_mainstack)	1243	if (coro->mainstack && coro->mainstack != main_mainstack)
816	{	1244	{
817	struct coro temp;	1245	struct coro temp;
818		1246
819	SAVE ((&temp), TRANSFER_SAVE_ALL);	1247	if (coro->flags & CF_RUNNING)
820	LOAD (coro);	1248	croak ("FATAL: tried to destroy currently running coroutine");
821		1249
822	coro_destroy_stacks ();	1250	save_perl (aTHX_ &temp);
		1251	load_perl (aTHX_ coro);
823		1252
824	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1253	coro_destroy (aTHX_ coro);
825		1254
		1255	load_perl (aTHX_ &temp);
		1256
826	coro->mainstack = 0;	1257	coro->slot = 0;
827	}	1258	}
828		1259
829	cctx_free (coro->cctx);	1260	cctx_destroy (coro->cctx);
830	SvREFCNT_dec (coro->args);	1261	SvREFCNT_dec (coro->args);
831	Safefree (coro);	1262
		1263	if (coro->next) coro->next->prev = coro->prev;
		1264	if (coro->prev) coro->prev->next = coro->next;
		1265	if (coro == coro_first) coro_first = coro->next;
		1266
		1267	return 1;
832	}	1268	}
833		1269
834	static int	1270	static int
835	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1271	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
836	{	1272	{
837	struct coro *coro = (struct coro *)mg->mg_ptr;	1273	struct coro *coro = (struct coro *)mg->mg_ptr;
838	mg->mg_ptr = 0;	1274	mg->mg_ptr = 0;
839		1275
		1276	coro->hv = 0;
		1277
		1278	if (--coro->refcnt < 0)
		1279	{
840	coro_state_destroy (coro);	1280	coro_state_destroy (aTHX_ coro);
		1281	Safefree (coro);
		1282	}
841		1283
842	return 0;	1284	return 0;
843	}	1285	}
844		1286
845	static int	1287	static int
…		…
852	return 0;	1294	return 0;
853	}	1295	}
854		1296
855	static MGVTBL coro_state_vtbl = {	1297	static MGVTBL coro_state_vtbl = {
856	0, 0, 0, 0,	1298	0, 0, 0, 0,
857	coro_state_clear,	1299	coro_state_free,
858	0,	1300	0,
859	#ifdef MGf_DUP	1301	#ifdef MGf_DUP
860	coro_state_dup,	1302	coro_state_dup,
861	#else	1303	#else
862	# define MGf_DUP 0	1304	# define MGf_DUP 0
863	#endif	1305	#endif
864	};	1306	};
865		1307
866	static struct coro *
867	SvSTATE (SV *coro)
868	{
869	HV *stash;
870	MAGIC *mg;
871
872	if (SvROK (coro))
873	coro = SvRV (coro);
874
875	stash = SvSTASH (coro);
876	if (stash != coro_stash && stash != coro_state_stash)
877	{
878	/* very slow, but rare, check */
879	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
880	croak ("Coro::State object required");
881	}
882
883	mg = SvMAGIC (coro);
884	assert (mg->mg_type == PERL_MAGIC_ext);
885	return (struct coro *)mg->mg_ptr;
886	}
887
888	static void	1308	static void
889	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1309	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
890	{	1310	{
891	ta->prev = SvSTATE (prev);	1311	ta->prev = SvSTATE (prev_sv);
892	ta->next = SvSTATE (next);	1312	ta->next = SvSTATE (next_sv);
893	ta->flags = flags;	1313	TRANSFER_CHECK (*ta);
894	}	1314	}
895		1315
896	static void	1316	static void
897	api_transfer (SV *prev, SV *next, int flags)	1317	api_transfer (SV *prev_sv, SV *next_sv)
898	{	1318	{
899	dTHX;	1319	dTHX;
900	struct transfer_args ta;	1320	struct transfer_args ta;
901		1321
902	prepare_transfer (&ta, prev, next, flags);	1322	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
903	TRANSFER (ta);	1323	TRANSFER (ta);
904	}	1324	}
905		1325
906	/** Coro ********************************************************************/	1326	/** Coro ********************************************************************/
907		1327
908	#define PRIO_MAX 3
909	#define PRIO_HIGH 1
910	#define PRIO_NORMAL 0
911	#define PRIO_LOW -1
912	#define PRIO_IDLE -3
913	#define PRIO_MIN -4
914
915	/* for Coro.pm */
916	static GV *coro_current, *coro_idle;
917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
918	static int coro_nready;
919
920	static void	1328	static void
921	coro_enq (SV *sv)	1329	coro_enq (pTHX_ SV *coro_sv)
		1330	{
		1331	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1332	}
		1333
		1334	static SV *
		1335	coro_deq (pTHX)
922	{	1336	{
923	int prio;	1337	int prio;
924		1338
925	if (SvTYPE (sv) != SVt_PVHV)
926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
927
928	prio = SvSTATE (sv)->prio;
929
930	av_push (coro_ready [prio - PRIO_MIN], sv);
931	coro_nready++;
932	}
933
934	static SV *
935	coro_deq (int min_prio)
936	{
937	int prio = PRIO_MAX - PRIO_MIN;
938
939	min_prio -= PRIO_MIN;
940	if (min_prio < 0)
941	min_prio = 0;
942
943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1339	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
944	if (AvFILLp (coro_ready [prio]) >= 0)	1340	if (AvFILLp (coro_ready [prio]) >= 0)
945	{
946	coro_nready--;
947	return av_shift (coro_ready [prio]);	1341	return av_shift (coro_ready [prio]);
948	}
949		1342
950	return 0;	1343	return 0;
951	}	1344	}
952		1345
953	static void	1346	static int
954	api_ready (SV *coro)	1347	api_ready (SV *coro_sv)
955	{	1348	{
956	dTHX;	1349	dTHX;
		1350	struct coro *coro;
957		1351
958	if (SvROK (coro))	1352	if (SvROK (coro_sv))
959	coro = SvRV (coro);	1353	coro_sv = SvRV (coro_sv);
		1354
		1355	coro = SvSTATE (coro_sv);
		1356
		1357	if (coro->flags & CF_READY)
		1358	return 0;
		1359
		1360	coro->flags |= CF_READY;
960		1361
961	LOCK;	1362	LOCK;
962	coro_enq (SvREFCNT_inc (coro));	1363	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1364	++coro_nready;
963	UNLOCK;	1365	UNLOCK;
964	}
965		1366
		1367	return 1;
		1368	}
		1369
966	static void	1370	static int
		1371	api_is_ready (SV *coro_sv)
		1372	{
		1373	dTHX;
		1374	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1375	}
		1376
		1377	static void
967	prepare_schedule (struct transfer_args *ta)	1378	prepare_schedule (pTHX_ struct transfer_args *ta)
968	{	1379	{
969	SV *current, *prev, *next;	1380	SV *prev_sv, *next_sv;
970
971	current = GvSV (coro_current);
972		1381
973	for (;;)	1382	for (;;)
974	{	1383	{
975	LOCK;	1384	LOCK;
976	next = coro_deq (PRIO_MIN);	1385	next_sv = coro_deq (aTHX);
		1386
		1387	/* nothing to schedule: call the idle handler */
		1388	if (expect_false (!next_sv))
		1389	{
		1390	dSP;
		1391	UNLOCK;
		1392
		1393	ENTER;
		1394	SAVETMPS;
		1395
		1396	PUSHMARK (SP);
		1397	PUTBACK;
		1398	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1399
		1400	FREETMPS;
		1401	LEAVE;
		1402	continue;
		1403	}
		1404
		1405	ta->next = SvSTATE (next_sv);
		1406
		1407	/* cannot transfer to destroyed coros, skip and look for next */
		1408	if (expect_false (ta->next->flags & CF_DESTROYED))
		1409	{
		1410	UNLOCK;
		1411	SvREFCNT_dec (next_sv);
		1412	/* coro_nready is already taken care of by destroy */
		1413	continue;
		1414	}
		1415
		1416	--coro_nready;
977	UNLOCK;	1417	UNLOCK;
978
979	if (next)
980	break;	1418	break;
981
982	{
983	dSP;
984
985	ENTER;
986	SAVETMPS;
987
988	PUSHMARK (SP);
989	PUTBACK;
990	call_sv (GvSV (coro_idle), G_DISCARD);
991
992	FREETMPS;
993	LEAVE;
994	}	1419	}
995	}
996
997	prev = SvRV (current);
998	SvRV (current) = next;
999		1420
1000	/* free this only after the transfer */	1421	/* free this only after the transfer */
		1422	prev_sv = SvRV (coro_current);
		1423	ta->prev = SvSTATE (prev_sv);
		1424	TRANSFER_CHECK (*ta);
		1425	assert (ta->next->flags & CF_READY);
		1426	ta->next->flags &= ~CF_READY;
		1427	SvRV_set (coro_current, next_sv);
		1428
1001	LOCK;	1429	LOCK;
1002	free_coro_mortal ();	1430	free_coro_mortal (aTHX);
		1431	coro_mortal = prev_sv;
1003	UNLOCK;	1432	UNLOCK;
1004	coro_mortal = prev;
1005
1006	ta->prev = SvSTATE (prev);
1007	ta->next = SvSTATE (next);
1008	ta->flags = TRANSFER_SAVE_ALL;
1009	}	1433	}
1010		1434
1011	static void	1435	static void
1012	prepare_cede (struct transfer_args *ta)	1436	prepare_cede (pTHX_ struct transfer_args *ta)
1013	{	1437	{
1014	LOCK;	1438	api_ready (coro_current);
1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016	UNLOCK;
1017
1018	prepare_schedule (ta);	1439	prepare_schedule (aTHX_ ta);
		1440	}
		1441
		1442	static int
		1443	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1444	{
		1445	if (coro_nready)
		1446	{
		1447	SV *prev = SvRV (coro_current);
		1448	prepare_schedule (aTHX_ ta);
		1449	api_ready (prev);
		1450	return 1;
		1451	}
		1452	else
		1453	return 0;
1019	}	1454	}
1020		1455
1021	static void	1456	static void
1022	api_schedule (void)	1457	api_schedule (void)
1023	{	1458	{
1024	dTHX;	1459	dTHX;
1025	struct transfer_args ta;	1460	struct transfer_args ta;
1026		1461
1027	prepare_schedule (&ta);	1462	prepare_schedule (aTHX_ &ta);
1028	TRANSFER (ta);	1463	TRANSFER (ta);
1029	}	1464	}
1030		1465
1031	static void	1466	static int
1032	api_cede (void)	1467	api_cede (void)
1033	{	1468	{
1034	dTHX;	1469	dTHX;
1035	struct transfer_args ta;	1470	struct transfer_args ta;
1036		1471
1037	prepare_cede (&ta);	1472	prepare_cede (aTHX_ &ta);
		1473
		1474	if (expect_true (ta.prev != ta.next))
		1475	{
1038	TRANSFER (ta);	1476	TRANSFER (ta);
		1477	return 1;
		1478	}
		1479	else
		1480	return 0;
1039	}	1481	}
1040		1482
		1483	static int
		1484	api_cede_notself (void)
		1485	{
		1486	dTHX;
		1487	struct transfer_args ta;
		1488
		1489	if (prepare_cede_notself (aTHX_ &ta))
		1490	{
		1491	TRANSFER (ta);
		1492	return 1;
		1493	}
		1494	else
		1495	return 0;
		1496	}
		1497
		1498	static void
		1499	api_trace (SV *coro_sv, int flags)
		1500	{
		1501	dTHX;
		1502	struct coro *coro = SvSTATE (coro_sv);
		1503
		1504	if (flags & CC_TRACE)
		1505	{
		1506	if (!coro->cctx)
		1507	coro->cctx = cctx_new ();
		1508	else if (!(coro->cctx->flags & CC_TRACE))
		1509	croak ("cannot enable tracing on coroutine with custom stack");
		1510
		1511	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1512	}
		1513	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1514	{
		1515	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1516
		1517	if (coro->flags & CF_RUNNING)
		1518	PL_runops = RUNOPS_DEFAULT;
		1519	else
		1520	coro->slot->runops = RUNOPS_DEFAULT;
		1521	}
		1522	}
		1523
1041	MODULE = Coro::State PACKAGE = Coro::State	1524	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1042		1525
1043	PROTOTYPES: DISABLE	1526	PROTOTYPES: DISABLE
1044		1527
1045	BOOT:	1528	BOOT:
1046	{	1529	{
1047	#ifdef USE_ITHREADS	1530	#ifdef USE_ITHREADS
1048	MUTEX_INIT (&coro_mutex);	1531	MUTEX_INIT (&coro_mutex);
1049	#endif	1532	#endif
1050	BOOT_PAGESIZE;	1533	BOOT_PAGESIZE;
1051		1534
		1535	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1536	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1537	#if 0
		1538	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1539	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1540	#endif
		1541	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1542	rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1543	rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1544
1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1545	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1053		1546
1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1547	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1548	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1549	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1550	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1057		1551
1058	main_mainstack = PL_mainstack;	1552	main_mainstack = PL_mainstack;
		1553	main_top_env = PL_top_env;
		1554
		1555	while (main_top_env->je_prev)
		1556	main_top_env = main_top_env->je_prev;
1059		1557
1060	coroapi.ver = CORO_API_VERSION;	1558	coroapi.ver = CORO_API_VERSION;
		1559	coroapi.rev = CORO_API_REVISION;
1061	coroapi.transfer = api_transfer;	1560	coroapi.transfer = api_transfer;
1062		1561
1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1562	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1064	}	1563	}
1065		1564
1066	SV *	1565	SV *
1067	new (char *klass, ...)	1566	new (char *klass, ...)
1068	CODE:	1567	CODE:
1069	{	1568	{
1070	struct coro *coro;	1569	struct coro *coro;
		1570	MAGIC *mg;
1071	HV *hv;	1571	HV *hv;
1072	int i;	1572	int i;
1073		1573
1074	Newz (0, coro, 1, struct coro);	1574	Newz (0, coro, 1, struct coro);
1075	coro->args = newAV ();	1575	coro->args = newAV ();
		1576	coro->flags = CF_NEW;
1076		1577
		1578	if (coro_first) coro_first->prev = coro;
		1579	coro->next = coro_first;
		1580	coro_first = coro;
		1581
1077	hv = newHV ();	1582	coro->hv = hv = newHV ();
1078	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1583	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1584	mg->mg_flags |= MGf_DUP;
1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1585	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1080		1586
		1587	av_extend (coro->args, items - 1);
1081	for (i = 1; i < items; i++)	1588	for (i = 1; i < items; i++)
1082	av_push (coro->args, newSVsv (ST (i)));	1589	av_push (coro->args, newSVsv (ST (i)));
1083	}	1590	}
1084	OUTPUT:	1591	OUTPUT:
1085	RETVAL	1592	RETVAL
1086		1593
		1594	# these not obviously related functions are all rolled into the same xs
		1595	# function to increase chances that they all will call transfer with the same
		1596	# stack offset
1087	void	1597	void
1088	_set_stacklevel (...)	1598	_set_stacklevel (...)
1089	ALIAS:	1599	ALIAS:
1090	Coro::State::transfer = 1	1600	Coro::State::transfer = 1
1091	Coro::schedule = 2	1601	Coro::schedule = 2
1092	Coro::cede = 3	1602	Coro::cede = 3
1093	Coro::Cont::yield = 4	1603	Coro::cede_notself = 4
1094	CODE:	1604	CODE:
1095	{	1605	{
1096	struct transfer_args ta;	1606	struct transfer_args ta;
1097		1607
1098	switch (ix)	1608	switch (ix)
1099	{	1609	{
1100	case 0:	1610	case 0:
1101	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1611	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102	ta.next = 0;	1612	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1613	break;
1105		1614
1106	case 1:	1615	case 1:
1107	if (items != 3)	1616	if (items != 2)
1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1617	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109		1618
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1619	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111	break;	1620	break;
1112		1621
1113	case 2:	1622	case 2:
1114	prepare_schedule (&ta);	1623	prepare_schedule (aTHX_ &ta);
1115	break;	1624	break;
1116		1625
1117	case 3:	1626	case 3:
1118	prepare_cede (&ta);	1627	prepare_cede (aTHX_ &ta);
1119	break;	1628	break;
1120		1629
1121	case 4:	1630	case 4:
1122	{	1631	if (!prepare_cede_notself (aTHX_ &ta))
1123	SV *yieldstack;	1632	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1633
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;	1634	break;
1146
1147	}	1635	}
1148		1636
		1637	BARRIER;
		1638	PUTBACK;
1149	TRANSFER (ta);	1639	TRANSFER (ta);
		1640	SPAGAIN; /* might be the sp of a different coroutine now */
		1641	/* be extra careful not to ever do anything after TRANSFER */
1150	}	1642	}
1151		1643
1152	void	1644	bool
1153	_clone_state_from (SV *dst, SV *src)	1645	_destroy (SV *coro_sv)
1154	CODE:	1646	CODE:
1155	{	1647	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1648	OUTPUT:
1157		1649	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		1650
1164	void	1651	void
1165	_exit (code)	1652	_exit (code)
1166	int code	1653	int code
1167	PROTOTYPE: $	1654	PROTOTYPE: $
1168	CODE:	1655	CODE:
1169	_exit (code);	1656	_exit (code);
1170		1657
1171	int	1658	int
		1659	cctx_stacksize (int new_stacksize = 0)
		1660	CODE:
		1661	RETVAL = coro_stacksize;
		1662	if (new_stacksize)
		1663	coro_stacksize = new_stacksize;
		1664	OUTPUT:
		1665	RETVAL
		1666
		1667	int
1172	cctx_count ()	1668	cctx_count ()
1173	CODE:	1669	CODE:
1174	RETVAL = cctx_count;	1670	RETVAL = cctx_count;
1175	OUTPUT:	1671	OUTPUT:
1176	RETVAL	1672	RETVAL
…		…
1180	CODE:	1676	CODE:
1181	RETVAL = cctx_idle;	1677	RETVAL = cctx_idle;
1182	OUTPUT:	1678	OUTPUT:
1183	RETVAL	1679	RETVAL
1184		1680
		1681	void
		1682	list ()
		1683	PPCODE:
		1684	{
		1685	struct coro *coro;
		1686	for (coro = coro_first; coro; coro = coro->next)
		1687	if (coro->hv)
		1688	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1689	}
		1690
		1691	void
		1692	call (Coro::State coro, SV *coderef)
		1693	ALIAS:
		1694	eval = 1
		1695	CODE:
		1696	{
		1697	if (coro->mainstack)
		1698	{
		1699	struct coro temp;
		1700
		1701	if (!(coro->flags & CF_RUNNING))
		1702	{
		1703	save_perl (aTHX_ &temp);
		1704	load_perl (aTHX_ coro);
		1705	}
		1706
		1707	{
		1708	dSP;
		1709	ENTER;
		1710	SAVETMPS;
		1711	PUTBACK;
		1712	PUSHSTACK;
		1713	PUSHMARK (SP);
		1714
		1715	if (ix)
		1716	eval_sv (coderef, 0);
		1717	else
		1718	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1719
		1720	POPSTACK;
		1721	SPAGAIN;
		1722	FREETMPS;
		1723	LEAVE;
		1724	PUTBACK;
		1725	}
		1726
		1727	if (!(coro->flags & CF_RUNNING))
		1728	{
		1729	save_perl (aTHX_ coro);
		1730	load_perl (aTHX_ &temp);
		1731	}
		1732	}
		1733	}
		1734
		1735	SV *
		1736	is_ready (Coro::State coro)
		1737	PROTOTYPE: $
		1738	ALIAS:
		1739	is_ready = CF_READY
		1740	is_running = CF_RUNNING
		1741	is_new = CF_NEW
		1742	is_destroyed = CF_DESTROYED
		1743	CODE:
		1744	RETVAL = boolSV (coro->flags & ix);
		1745	OUTPUT:
		1746	RETVAL
		1747
		1748	void
		1749	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1750
		1751	SV *
		1752	has_stack (Coro::State coro)
		1753	PROTOTYPE: $
		1754	CODE:
		1755	RETVAL = boolSV (!!coro->cctx);
		1756	OUTPUT:
		1757	RETVAL
		1758
		1759	int
		1760	is_traced (Coro::State coro)
		1761	PROTOTYPE: $
		1762	CODE:
		1763	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1764	OUTPUT:
		1765	RETVAL
		1766
		1767	IV
		1768	rss (Coro::State coro)
		1769	PROTOTYPE: $
		1770	ALIAS:
		1771	usecount = 1
		1772	CODE:
		1773	switch (ix)
		1774	{
		1775	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1776	case 1: RETVAL = coro->usecount; break;
		1777	}
		1778	OUTPUT:
		1779	RETVAL
		1780
		1781
1185	MODULE = Coro::State PACKAGE = Coro	1782	MODULE = Coro::State PACKAGE = Coro
1186		1783
1187	BOOT:	1784	BOOT:
1188	{	1785	{
1189	int i;	1786	int i;
1190		1787
		1788	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1789	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1790	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1791
		1792	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1793	SvREADONLY_on (coro_current);
		1794
1191	coro_stash = gv_stashpv ("Coro", TRUE);	1795	coro_stash = gv_stashpv ("Coro", TRUE);
1192		1796
1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1797	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1798	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1799	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1800	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1801	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1802	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1199		1803
1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1202
1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1804	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1204	coro_ready[i] = newAV ();	1805	coro_ready[i] = newAV ();
1205		1806
1206	{	1807	{
1207	SV *sv = perl_get_sv("Coro::API", 1);	1808	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1809	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1208		1810
1209	coroapi.schedule = api_schedule;	1811	coroapi.schedule = api_schedule;
1210	coroapi.cede = api_cede;	1812	coroapi.cede = api_cede;
		1813	coroapi.cede_notself = api_cede_notself;
1211	coroapi.ready = api_ready;	1814	coroapi.ready = api_ready;
		1815	coroapi.is_ready = api_is_ready;
1212	coroapi.nready = &coro_nready;	1816	coroapi.nready = &coro_nready;
1213	coroapi.current = coro_current;	1817	coroapi.current = coro_current;
1214		1818
1215	GCoroAPI = &coroapi;	1819	GCoroAPI = &coroapi;
1216	sv_setiv (sv, (IV)&coroapi);	1820	sv_setiv (sv, (IV)&coroapi);
1217	SvREADONLY_on (sv);	1821	SvREADONLY_on (sv);
1218	}	1822	}
1219	}	1823	}
		1824
		1825	void
		1826	_set_current (SV *current)
		1827	PROTOTYPE: $
		1828	CODE:
		1829	SvREFCNT_dec (SvRV (coro_current));
		1830	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1220		1831
1221	int	1832	int
1222	prio (Coro::State coro, int newprio = 0)	1833	prio (Coro::State coro, int newprio = 0)
1223	ALIAS:	1834	ALIAS:
1224	nice = 1	1835	nice = 1
…		…
1227	RETVAL = coro->prio;	1838	RETVAL = coro->prio;
1228		1839
1229	if (items > 1)	1840	if (items > 1)
1230	{	1841	{
1231	if (ix)	1842	if (ix)
1232	newprio += coro->prio;	1843	newprio = coro->prio - newprio;
1233		1844
1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1845	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1846	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1236		1847
1237	coro->prio = newprio;	1848	coro->prio = newprio;
1238	}	1849	}
1239	}	1850	}
		1851	OUTPUT:
		1852	RETVAL
1240		1853
1241	void	1854	SV *
1242	ready (SV *self)	1855	ready (SV *self)
1243	PROTOTYPE: $	1856	PROTOTYPE: $
1244	CODE:	1857	CODE:
1245	api_ready (self);	1858	RETVAL = boolSV (api_ready (self));
		1859	OUTPUT:
		1860	RETVAL
1246		1861
1247	int	1862	int
1248	nready (...)	1863	nready (...)
1249	PROTOTYPE:	1864	PROTOTYPE:
1250	CODE:	1865	CODE:
1251	RETVAL = coro_nready;	1866	RETVAL = coro_nready;
1252	OUTPUT:	1867	OUTPUT:
1253	RETVAL	1868	RETVAL
1254		1869
		1870	void
		1871	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1872	PROTOTYPE: $;$
		1873	CODE:
		1874	SvREFCNT_dec (self->throw);
		1875	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1876
		1877	# for async_pool speedup
		1878	void
		1879	_pool_1 (SV *cb)
		1880	CODE:
		1881	{
		1882	struct coro *coro = SvSTATE (coro_current);
		1883	HV *hv = (HV *)SvRV (coro_current);
		1884	AV *defav = GvAV (PL_defgv);
		1885	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1886	AV *invoke_av;
		1887	int i, len;
		1888
		1889	if (!invoke)
		1890	croak ("\3async_pool terminate\2\n");
		1891
		1892	SvREFCNT_dec (coro->saved_deffh);
		1893	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1894
		1895	hv_store (hv, "desc", sizeof ("desc") - 1,
		1896	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1897
		1898	invoke_av = (AV *)SvRV (invoke);
		1899	len = av_len (invoke_av);
		1900
		1901	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1902
		1903	if (len > 0)
		1904	{
		1905	av_fill (defav, len - 1);
		1906	for (i = 0; i < len; ++i)
		1907	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1908	}
		1909
		1910	SvREFCNT_dec (invoke);
		1911	}
		1912
		1913	void
		1914	_pool_2 (SV *cb)
		1915	CODE:
		1916	{
		1917	struct coro *coro = SvSTATE (coro_current);
		1918
		1919	sv_setsv (cb, &PL_sv_undef);
		1920
		1921	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1922	coro->saved_deffh = 0;
		1923
		1924	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1925	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1926	croak ("\3async_pool terminate\2\n");
		1927
		1928	av_clear (GvAV (PL_defgv));
		1929	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1930	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1931
		1932	coro->prio = 0;
		1933
		1934	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1935	api_trace (coro_current, 0);
		1936
		1937	av_push (av_async_pool, newSVsv (coro_current));
		1938	}
		1939
		1940
1255	MODULE = Coro::State PACKAGE = Coro::AIO	1941	MODULE = Coro::State PACKAGE = Coro::AIO
1256		1942
1257	SV *	1943	SV *
1258	_get_state ()	1944	_get_state ()
1259	CODE:	1945	CODE:
1260	{	1946	{
1261	struct {	1947	struct io_state *data;
1262	int errorno;
1263	int laststype;
1264	int laststatval;
1265	Stat_t statcache;
1266	} data;
1267		1948
		1949	RETVAL = newSV (sizeof (struct io_state));
		1950	data = (struct io_state *)SvPVX (RETVAL);
		1951	SvCUR_set (RETVAL, sizeof (struct io_state));
		1952	SvPOK_only (RETVAL);
		1953
1268	data.errorno = errno;	1954	data->errorno = errno;
1269	data.laststype = PL_laststype;	1955	data->laststype = PL_laststype;
1270	data.laststatval = PL_laststatval;	1956	data->laststatval = PL_laststatval;
1271	data.statcache = PL_statcache;	1957	data->statcache = PL_statcache;
1272
1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
1274	}	1958	}
1275	OUTPUT:	1959	OUTPUT:
1276	RETVAL	1960	RETVAL
1277		1961
1278	void	1962	void
1279	_set_state (char *data_)	1963	_set_state (char *data_)
1280	PROTOTYPE: $	1964	PROTOTYPE: $
1281	CODE:	1965	CODE:
1282	{	1966	{
1283	struct {	1967	struct io_state *data = (void *)data_;
1284	int errorno;
1285	int laststype;
1286	int laststatval;
1287	Stat_t statcache;
1288	} *data = (void *)data_;
1289		1968
1290	errno = data->errorno;	1969	errno = data->errorno;
1291	PL_laststype = data->laststype;	1970	PL_laststype = data->laststype;
1292	PL_laststatval = data->laststatval;	1971	PL_laststatval = data->laststatval;
1293	PL_statcache = data->statcache;	1972	PL_statcache = data->statcache;
1294	}	1973	}
		1974

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines