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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.70 by root, Mon Dec 26 19:26:52 2005 UTC vs.
Revision 1.222 by root, Sun Jan 20 10:22:07 2008 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#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 <errno.h>	77	/* 5.8.7 */
33	#include <signal.h>	78	#ifndef SvRV_set
34		79	# define SvRV_set(s,v) SvRV(s) = (v)
35	#ifdef HAVE_MMAP
36	# include <unistd.h>
37	# include <sys/mman.h>
38	# ifndef MAP_ANONYMOUS
39	# ifdef MAP_ANON
40	# define MAP_ANONYMOUS MAP_ANON
41	# else
42	# undef HAVE_MMAP
43	# endif
44	# endif	80	#endif
45	#endif
46		81
47	#define SUB_INIT "Coro::State::initialize"	82	/* 5.8.8 */
48	#define UCORO_STATE "_coro_state"	83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
49		89
50	/* The next macro should declare a variable stacklevel that contains and approximation	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
51	* to the current C stack pointer. Its property is that it changes with each call	91	# undef CORO_STACKGUARD
52	* and should be unique. */	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. */
		105	#define dSTACKLEVEL volatile char stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	106	#define STACKLEVEL ((void *)&stacklevel)
54		107
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		109
57	#define labs(l) ((l) >= 0 ? (l) : -(l))	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))
58		124
59	#include "CoroAPI.h"	125	#include "CoroAPI.h"
60		126
61	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
…		…
65	#else	131	#else
66	# define LOCK (void)0	132	# define LOCK (void)0
67	# define UNLOCK (void)0	133	# define UNLOCK (void)0
68	#endif	134	#endif
69		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;
70	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
71	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;
72	static HV *coro_state_stash;	149	static HV *coro_state_stash, *coro_stash;
73	static SV *ucoro_state_sv;
74	static U32 ucoro_state_hash;
75	static SV *coro_mortal; /* will be freed after next transfer */	150	static volatile SV *coro_mortal; /* will be freed after next transfer */
76		151
77	/* this is actually not only the c stack but also c registers etc... */	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	};
		174
		175	/* this is a structure representing a c-level coroutine */
		176	typedef struct coro_cctx {
		177	struct coro_cctx *next;
		178
		179	/* the stack */
		180	void *sptr;
		181	size_t ssize;
		182
		183	/* cpu state */
		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 */
		186	JMPENV *top_env;
		187	coro_context cctx;
		188
		189	#if CORO_USE_VALGRIND
		190	int valgrind_id;
		191	#endif
		192	unsigned char flags;
		193	} coro_cctx;
		194
		195	enum {
		196	CF_RUNNING = 0x0001, /* coroutine is running */
		197	CF_READY = 0x0002, /* coroutine is ready */
		198	CF_NEW = 0x0004, /* has never been switched to */
		199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		200	};
		201
		202	/* the structure where most of the perl state is stored, overlaid on the cxstack */
78	typedef struct {	203	typedef struct {
79	int refcnt; /* pointer reference counter */	204	SV *defsv;
80	int usecnt; /* shared by how many coroutines */	205	AV *defav;
81	int gencnt; /* generation counter */	206	SV *errsv;
		207	SV *irsgv;
		208	#define VAR(name,type) type name;
		209	# include "state.h"
		210	#undef VAR
		211	} perl_slots;
82		212
83	coro_context cctx;	213	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
84		214
85	void *sptr;	215	/* this is a structure representing a perl-level coroutine */
86	long ssize; /* positive == mmap, otherwise malloc */
87	} coro_stack;
88
89	struct coro {	216	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	217	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;	218	coro_cctx *cctx;
92		219
93	/* the optional C context */	220	/* process data */
94	coro_stack *stack;
95	void *cursp;
96	int gencnt;
97
98	/* optionally saved, might be zero */
99	AV *defav;
100	SV *defsv;
101	SV *errsv;
102
103	/* saved global state not related to stacks */
104	U8 dowarn;
105	I32 in_eval;
106
107	/* the stacks and related info (callchain etc..) */
108	PERL_SI *curstackinfo;
109	AV *curstack;
110	AV *mainstack;	221	AV *mainstack;
111	SV **stack_sp;	222	perl_slots *slot; /* basically the saved sp */
112	OP *op;
113	SV **curpad;
114	AV *comppad;
115	CV *compcv;
116	SV **stack_base;
117	SV **stack_max;
118	SV **tmps_stack;
119	I32 tmps_floor;
120	I32 tmps_ix;
121	I32 tmps_max;
122	I32 *markstack;
123	I32 *markstack_ptr;
124	I32 *markstack_max;
125	I32 *scopestack;
126	I32 scopestack_ix;
127	I32 scopestack_max;
128	ANY *savestack;
129	I32 savestack_ix;
130	I32 savestack_max;
131	OP **retstack;
132	I32 retstack_ix;
133	I32 retstack_max;
134	PMOP *curpm;
135	COP *curcop;
136	JMPENV *top_env;
137		223
138	/* data associated with this coroutine (initial args) */	224	AV *args; /* data associated with this coroutine (initial args) */
139	AV *args;	225	int refcnt; /* coroutines are refcounted, yes */
		226	int flags; /* CF_ flags */
		227	HV *hv; /* the perl hash associated with this coro, if any */
		228
		229	/* statistics */
		230	int usecount; /* number of transfers to this coro */
		231
		232	/* coro process data */
		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;
140	};	241	};
141		242
142	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
144		245
145	/* mostly copied from op.c:cv_clone2 */	246	/** Coro ********************************************************************/
146	STATIC AV *	247
147	clone_padlist (pTHX_ AV *protopadlist)	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)
148	{	265	{
149	AV *av;	266	#if PERL_VERSION_ATLEAST (5,9,0)
150	I32 ix;	267	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
151	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	268	get_sv (name, create);
152	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	269	#endif
153	SV **pname = AvARRAY (protopad_name);	270	return get_sv (name, create);
154	SV **ppad = AvARRAY (protopad);	271	}
155	I32 fname = AvFILLp (protopad_name);	272
156	I32 fpad = AvFILLp (protopad);	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 *
		294	coro_clone_padlist (pTHX_ CV *cv)
		295	{
		296	AV *padlist = CvPADLIST (cv);
157	AV *newpadlist, *newpad_name, *newpad;	297	AV *newpadlist, *newpad;
158	SV **npad;
159
160	newpad_name = newAV ();
161	for (ix = fname; ix >= 0; ix--)
162	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164	newpad = newAV ();
165	av_fill (newpad, AvFILLp (protopad));
166	npad = AvARRAY (newpad);
167		298
168	newpadlist = newAV ();	299	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	300	AvREAL_off (newpadlist);
170	av_store (newpadlist, 0, (SV *) newpad_name);	301	#if PERL_VERSION_ATLEAST (5,9,0)
		302	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		303	#else
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		305	#endif
		306	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		307	--AvFILLp (padlist);
		308
		309	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171	av_store (newpadlist, 1, (SV *) newpad);	310	av_store (newpadlist, 1, (SV *)newpad);
172
173	av = newAV (); /* will be @_ */
174	av_extend (av, 0);
175	av_store (newpad, 0, (SV *) av);
176	AvFLAGS (av) = AVf_REIFY;
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char *name = SvPVX (namesv); /* XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV *kid = cv_clone((CV*)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		311
242	return newpadlist;	312	return newpadlist;
243	}	313	}
244		314
245	STATIC void	315	static void
246	free_padlist (pTHX_ AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
247	{	317	{
248	/* may be during global destruction */	318	/* may be during global destruction */
249	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
250	{	320	{
…		…
264		334
265	SvREFCNT_dec ((SV*)padlist);	335	SvREFCNT_dec ((SV*)padlist);
266	}	336	}
267	}	337	}
268		338
269	STATIC int	339	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	340	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	341	{
272	AV *padlist;	342	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
274		344
275	/* casting is fun. */	345	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	347	free_padlist (aTHX_ padlist);
278		348
279	SvREFCNT_dec (av);	349	return 0;
280	}	350	}
281		351
282	#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
283		354
284	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))
285		395
286	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
287	STATIC void	397	static void
288	get_padlist (pTHX_ CV *cv)	398	get_padlist (pTHX_ CV *cv)
289	{	399	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
		401	AV *av;
291		402
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294	else	405	else
		406	{
		407	#if CORO_PREFER_PERL_FUNCTIONS
		408	/* this is probably cleaner, but also slower? */
		409	CV *cp = Perl_cv_clone (cv);
		410	CvPADLIST (cv) = CvPADLIST (cp);
		411	CvPADLIST (cp) = 0;
		412	SvREFCNT_dec (cp);
		413	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		415	#endif
		416	}
296	}	417	}
297		418
298	STATIC void	419	static void
299	put_padlist (pTHX_ CV *cv)	420	put_padlist (pTHX_ CV *cv)
300	{	421	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
		423	AV *av;
302		424
303	if (!mg)	425	if (expect_false (!mg))
304	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
305	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307	mg->mg_virtual = &vtbl_coro;
308	mg->mg_obj = (SV *)newAV ();
309	}
310		427
311	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	428	av = (AV *)mg->mg_obj;
312	}
313		429
314	#define SB do {	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
315	#define SE } while (0)	431	av_extend (av, AvMAX (av) + 1);
316		432
317	#define LOAD(state) load_state(aTHX_ (state));	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	434	}
319		435
320	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	436	/** load & save, init *******************************************************/
321		437
322	static void	438	static void
323	load_state(pTHX_ Coro__State c)	439	load_perl (pTHX_ Coro__State c)
324	{	440	{
325	PL_dowarn = c->dowarn;	441	perl_slots *slot = c->slot;
326	PL_in_eval = c->in_eval;	442	c->slot = 0;
327		443
328	PL_curstackinfo = c->curstackinfo;
329	PL_curstack = c->curstack;
330	PL_mainstack = c->mainstack;	444	PL_mainstack = c->mainstack;
331	PL_stack_sp = c->stack_sp;
332	PL_op = c->op;
333	PL_curpad = c->curpad;
334	PL_comppad = c->comppad;
335	PL_compcv = c->compcv;
336	PL_stack_base = c->stack_base;
337	PL_stack_max = c->stack_max;
338	PL_tmps_stack = c->tmps_stack;
339	PL_tmps_floor = c->tmps_floor;
340	PL_tmps_ix = c->tmps_ix;
341	PL_tmps_max = c->tmps_max;
342	PL_markstack = c->markstack;
343	PL_markstack_ptr = c->markstack_ptr;
344	PL_markstack_max = c->markstack_max;
345	PL_scopestack = c->scopestack;
346	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;
351	PL_retstack = c->retstack;
352	PL_retstack_ix = c->retstack_ix;
353	PL_retstack_max = c->retstack_max;
354	PL_curpm = c->curpm;
355	PL_curcop = c->curcop;
356	PL_top_env = c->top_env;
357		445
358	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	446	GvSV (PL_defgv) = slot->defsv;
359	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	447	GvAV (PL_defgv) = slot->defav;
360	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
361		454
362	{	455	{
363	dSP;	456	dSP;
		457
364	CV *cv;	458	CV *cv;
365		459
366	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
367	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
368	{	462	{
369	AV *padlist = (AV *)POPs;
370
371	if (padlist)
372	{
373	put_padlist (aTHX_ cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
374	CvPADLIST(cv) = padlist;	464	CvDEPTH (cv) = PTR2IV (POPs);
375	}	465	CvPADLIST (cv) = (AV *)POPs;
376
377	++CvDEPTH(cv);
378	}	466	}
379		467
380	PUTBACK;	468	PUTBACK;
381	}	469	}
382	}	470	}
383		471
384	static void	472	static void
385	save_state(pTHX_ Coro__State c, int flags)	473	save_perl (pTHX_ Coro__State c)
386	{	474	{
387	{	475	{
388	dSP;	476	dSP;
389	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
390	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
393	/*	481	/*
394	* 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
395	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
396	*/	484	*/
397		485
398	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
399	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
400	for (;;)	488	for (;;)
401	{	489	{
402	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
403	{	491	{
404	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
405		493
406	if (CxTYPE(cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
407	{	495	{
408	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
		497
409	if (CvDEPTH(cv))	498	if (expect_true (CvDEPTH (cv)))
410	{	499	{
411	EXTEND (SP, CvDEPTH(cv)*2);	500	EXTEND (SP, 3);
412
413	while (--CvDEPTH(cv))
414	{
415	/* this tells the restore code to increment CvDEPTH */
416	PUSHs (Nullsv);
417	PUSHs ((SV *)cv);
418	}
419
420	PUSHs ((SV *)CvPADLIST(cv));	501	PUSHs ((SV *)CvPADLIST (cv));
		502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
421	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
422		504
		505	CvDEPTH (cv) = 0;
423	get_padlist (aTHX_ cv); /* this is a monster */	506	get_padlist (aTHX_ cv);
424	}	507	}
425	}	508	}
426	#ifdef CXt_FORMAT
427	else if (CxTYPE(cx) == CXt_FORMAT)
428	{
429	/* I never used formats, so how should I know how these are implemented? */
430	/* my bold guess is as a simple, plain sub... */
431	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
432	}
433	#endif
434	}	509	}
435		510
436	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
437	break;	512	break;
438		513
439	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
440	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
441	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
442	}	517	}
443		518
444	PUTBACK;	519	PUTBACK;
445	}	520	}
446		521
447	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
448	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
449	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 */
450		533
451	c->dowarn = PL_dowarn;
452	c->in_eval = PL_in_eval;
453
454	c->curstackinfo = PL_curstackinfo;
455	c->curstack = PL_curstack;
456	c->mainstack = PL_mainstack;	534	c->mainstack = PL_mainstack;
457	c->stack_sp = PL_stack_sp;	535
458	c->op = PL_op;	536	{
459	c->curpad = PL_curpad;	537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
460	c->comppad = PL_comppad;	538
461	c->compcv = PL_compcv;	539	slot->defav = GvAV (PL_defgv);
462	c->stack_base = PL_stack_base;	540	slot->defsv = DEFSV;
463	c->stack_max = PL_stack_max;	541	slot->errsv = ERRSV;
464	c->tmps_stack = PL_tmps_stack;	542	slot->irsgv = GvSV (irsgv);
465	c->tmps_floor = PL_tmps_floor;	543
466	c->tmps_ix = PL_tmps_ix;	544	#define VAR(name,type) slot->name = PL_ ## name;
467	c->tmps_max = PL_tmps_max;	545	# include "state.h"
468	c->markstack = PL_markstack;	546	#undef VAR
469	c->markstack_ptr = PL_markstack_ptr;	547	}
470	c->markstack_max = PL_markstack_max;
471	c->scopestack = PL_scopestack;
472	c->scopestack_ix = PL_scopestack_ix;
473	c->scopestack_max = PL_scopestack_max;
474	c->savestack = PL_savestack;
475	c->savestack_ix = PL_savestack_ix;
476	c->savestack_max = PL_savestack_max;
477	c->retstack = PL_retstack;
478	c->retstack_ix = PL_retstack_ix;
479	c->retstack_max = PL_retstack_max;
480	c->curpm = PL_curpm;
481	c->curcop = PL_curcop;
482	c->top_env = PL_top_env;
483	}	548	}
484		549
485	/*	550	/*
486	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
487	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
488	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
489	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
490	*/	555	*/
491	STATIC void	556	#if CORO_PREFER_PERL_FUNCTIONS
		557	# define coro_init_stacks init_stacks
		558	#else
		559	static void
492	coro_init_stacks (pTHX)	560	coro_init_stacks (pTHX)
493	{	561	{
494	LOCK;	562	PL_curstackinfo = new_stackinfo(32, 8);
495
496	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
497	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
498	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
499	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
500		566
501	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
502	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
503	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
504		570
505	New(50,PL_tmps_stack,96,SV*);	571	New(50,PL_tmps_stack,32,SV*);
506	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
507	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
508	PL_tmps_max = 96;	574	PL_tmps_max = 32;
509		575
510	New(54,PL_markstack,16,I32);	576	New(54,PL_markstack,16,I32);
511	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
512	PL_markstack_max = PL_markstack + 16;	578	PL_markstack_max = PL_markstack + 16;
513		579
514	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
515	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
516	#endif	582	#endif
517		583
518	New(54,PL_scopestack,16,I32);	584	New(54,PL_scopestack,8,I32);
519	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
520	PL_scopestack_max = 16;	586	PL_scopestack_max = 8;
521		587
522	New(54,PL_savestack,96,ANY);	588	New(54,PL_savestack,24,ANY);
523	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
524	PL_savestack_max = 96;	590	PL_savestack_max = 24;
525		591
		592	#if !PERL_VERSION_ATLEAST (5,9,0)
526	New(54,PL_retstack,8,OP*);	593	New(54,PL_retstack,4,OP*);
527	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
528	PL_retstack_max = 8;	595	PL_retstack_max = 4;
529		596	#endif
530	UNLOCK;
531	}	597	}
		598	#endif
532		599
533	/*	600	/*
534	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
535	*/	602	*/
536	STATIC void	603	static void
537	destroy_stacks(pTHX)	604	coro_destroy_stacks (pTHX)
538	{	605	{
539	if (!IN_DESTRUCT)
540	{
541	/* is this ugly, I ask? */
542	LEAVE_SCOPE (0);
543
544	/* sure it is, but more important: is it correct?? :/ */
545	FREETMPS;
546
547	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
548	}
549
550	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
551	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
552		608
553	while (PL_curstackinfo)	609	while (PL_curstackinfo)
554	{	610	{
555	PERL_SI *p = PL_curstackinfo->si_prev;	611	PERL_SI *p = PL_curstackinfo->si_prev;
556		612
557	{ /*D*//*remove*/
558	dSP;
559	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
560	PUTBACK; /* possibly superfluous */
561	}
562
563	if (!IN_DESTRUCT)	613	if (!IN_DESTRUCT)
564	{
565	dounwind (-1);/*D*//*remove*/
566	SvREFCNT_dec (PL_curstackinfo->si_stack);	614	SvREFCNT_dec (PL_curstackinfo->si_stack);
567	}
568		615
569	Safefree (PL_curstackinfo->si_cxstack);	616	Safefree (PL_curstackinfo->si_cxstack);
570	Safefree (PL_curstackinfo);	617	Safefree (PL_curstackinfo);
571	PL_curstackinfo = p;	618	PL_curstackinfo = p;
572	}	619	}
573		620
574	Safefree (PL_tmps_stack);	621	Safefree (PL_tmps_stack);
575	Safefree (PL_markstack);	622	Safefree (PL_markstack);
576	Safefree (PL_scopestack);	623	Safefree (PL_scopestack);
577	Safefree (PL_savestack);	624	Safefree (PL_savestack);
		625	#if !PERL_VERSION_ATLEAST (5,9,0)
578	Safefree (PL_retstack);	626	Safefree (PL_retstack);
		627	#endif
		628	}
		629
		630	static size_t
		631	coro_rss (pTHX_ struct coro *coro)
		632	{
		633	size_t rss = sizeof (*coro);
		634
		635	if (coro->mainstack)
		636	{
		637	perl_slots tmp_slot;
		638	perl_slots *slot;
		639
		640	if (coro->flags & CF_RUNNING)
		641	{
		642	slot = &tmp_slot;
		643
		644	#define VAR(name,type) slot->name = PL_ ## name;
		645	# include "state.h"
		646	#undef VAR
		647	}
		648	else
		649	slot = coro->slot;
		650
		651	rss += sizeof (slot->curstackinfo);
		652	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		653	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		654	rss += slot->tmps_max * sizeof (SV *);
		655	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		656	rss += slot->scopestack_max * sizeof (I32);
		657	rss += slot->savestack_max * sizeof (ANY);
		658
		659	#if !PERL_VERSION_ATLEAST (5,9,0)
		660	rss += slot->retstack_max * sizeof (OP *);
		661	#endif
		662	}
		663
		664	return rss;
		665	}
		666
		667	/** coroutine stack handling ************************************************/
		668
		669	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		670	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		671
		672	/*
		673	* This overrides the default magic get method of %SIG elements.
		674	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		675	* and instead of tryign to save and restore the hash elements, we just provide
		676	* readback here.
		677	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		678	* not expecting this to actually change the hook. This is a potential problem
		679	* when a schedule happens then, but we ignore this.
		680	*/
		681	static int
		682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	const char *s = MgPV_nolen_const (mg);
		685
		686	if (*s == '_')
		687	{
		688	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		689	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		690	}
		691
		692	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		693	}
		694
		695	static int
		696	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		697	{
		698	const char *s = MgPV_nolen_const (mg);
		699
		700	if (*s == '_')
		701	{
		702	SV **svp = 0;
		703
		704	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		705	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		706
		707	if (svp)
		708	{
		709	SV *old = *svp;
		710	*svp = newSVsv (sv);
		711	SvREFCNT_dec (old);
		712	return;
		713	}
		714	}
		715
		716	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
579	}	717	}
580		718
581	static void	719	static void
582	allocate_stack (Coro__State ctx, int alloc)	720	coro_setup (pTHX_ struct coro *coro)
583	{
584	coro_stack *stack;
585
586	New (0, stack, 1, coro_stack);
587
588	stack->refcnt = 1;
589	stack->usecnt = 1;
590	stack->gencnt = ctx->gencnt = 0;
591
592	if (alloc)
593	{
594	#if HAVE_MMAP
595	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
596	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
597	if (stack->sptr == (void *)-1)
598	#endif
599	{
600	/*FIXME*//*D*//* reasonable stack size! */
601	stack->ssize = - (STACKSIZE * sizeof (long));
602	New (0, stack->sptr, STACKSIZE, long);
603	}
604	}
605	else
606	stack->sptr = 0;
607
608	ctx->stack = stack;
609	}
610
611	static void
612	deallocate_stack (Coro__State ctx)
613	{
614	coro_stack *stack = ctx->stack;
615
616	ctx->stack = 0;
617
618	if (stack)
619	{
620	if (!--stack->refcnt)
621	{
622	#ifdef HAVE_MMAP
623	if (stack->ssize > 0 && stack->sptr)
624	munmap (stack->sptr, stack->ssize);
625	else
626	#endif
627	Safefree (stack->sptr);
628
629	Safefree (stack);
630	}
631	else if (ctx->gencnt == stack->gencnt)
632	--stack->usecnt;
633	}
634	}
635
636	static void
637	setup_coro (void *arg)
638	{	721	{
639	/*	722	/*
640	* emulate part of the perl startup here.	723	* emulate part of the perl startup here.
641	*/	724	*/
642	dTHX;
643	dSP;
644	Coro__State ctx = (Coro__State)arg;
645	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
646
647	coro_init_stacks (aTHX);	725	coro_init_stacks (aTHX);
648	/*PL_curcop = 0;*/	726
649	/*PL_in_eval = PL_in_eval;*/ /* inherit */	727	PL_runops = RUNOPS_DEFAULT;
		728	PL_curcop = &PL_compiling;
		729	PL_in_eval = EVAL_NULL;
		730	PL_comppad = 0;
		731	PL_curpm = 0;
		732	PL_curpad = 0;
		733	PL_localizing = 0;
		734	PL_dirty = 0;
		735	PL_restartop = 0;
		736
		737	/* recreate the die/warn hooks */
		738	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		739	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		740
		741	GvSV (PL_defgv) = newSV (0);
		742	GvAV (PL_defgv) = coro->args; coro->args = 0;
		743	GvSV (PL_errgv) = newSV (0);
		744	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		745	PL_rs = newSVsv (GvSV (irsgv));
		746	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		747
		748	{
		749	dSP;
		750	LOGOP myop;
		751
		752	Zero (&myop, 1, LOGOP);
		753	myop.op_next = Nullop;
		754	myop.op_flags = OPf_WANT_VOID;
		755
		756	PUSHMARK (SP);
		757	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		758	PUTBACK;
		759	PL_op = (OP *)&myop;
		760	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		761	SPAGAIN;
		762	}
		763
		764	/* this newly created coroutine might be run on an existing cctx which most
		765	* likely was suspended in set_stacklevel, called from entersub.
		766	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		767	* so we ENTER here for symmetry
		768	*/
		769	ENTER;
		770	}
		771
		772	static void
		773	coro_destroy (pTHX_ struct coro *coro)
		774	{
		775	if (!IN_DESTRUCT)
		776	{
		777	/* restore all saved variables and stuff */
		778	LEAVE_SCOPE (0);
		779	assert (PL_tmps_floor == -1);
		780
		781	/* free all temporaries */
		782	FREETMPS;
		783	assert (PL_tmps_ix == -1);
		784
		785	/* unwind all extra stacks */
		786	POPSTACK_TO (PL_mainstack);
		787
		788	/* unwind main stack */
		789	dounwind (-1);
		790	}
		791
		792	SvREFCNT_dec (GvSV (PL_defgv));
650	SvREFCNT_dec (GvAV (PL_defgv));	793	SvREFCNT_dec (GvAV (PL_defgv));
651	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	794	SvREFCNT_dec (GvSV (PL_errgv));
		795	SvREFCNT_dec (PL_defoutgv);
		796	SvREFCNT_dec (PL_rs);
		797	SvREFCNT_dec (GvSV (irsgv));
652		798
653	SPAGAIN;	799	SvREFCNT_dec (PL_diehook);
		800	SvREFCNT_dec (PL_warnhook);
		801
		802	SvREFCNT_dec (coro->saved_deffh);
		803	SvREFCNT_dec (coro->throw);
654		804
655	if (ctx->stack)	805	coro_destroy_stacks (aTHX);
656	{
657	ctx->cursp = 0;
658
659	PUSHMARK(SP);
660	PUTBACK;
661	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
662
663	if (SvTRUE (ERRSV))
664	croak (NULL);
665	else
666	croak ("FATAL: CCTXT coroutine returned!");
667	}
668	else
669	{
670	UNOP myop;
671
672	PL_op = (OP *)&myop;
673
674	Zero(&myop, 1, UNOP);
675	myop.op_next = Nullop;
676	myop.op_flags = OPf_WANT_VOID;
677
678	PUSHMARK(SP);
679	XPUSHs (sub_init);
680	/*
681	* the next line is slightly wrong, as PL_op->op_next
682	* is actually being executed so we skip the first op.
683	* that doesn't matter, though, since it is only
684	* pp_nextstate and we never return...
685	* ah yes, and I don't care anyways ;)
686	*/
687	PUTBACK;
688	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
689	SPAGAIN;
690
691	ENTER; /* necessary e.g. for dounwind */
692	}
693	}	806	}
694		807
695	static void	808	static void
696	continue_coro (void *arg)	809	free_coro_mortal (pTHX)
697	{	810	{
698	/*	811	if (expect_true (coro_mortal))
699	* this is a _very_ stripped down perl interpreter ;)	812	{
700	*/	813	SvREFCNT_dec (coro_mortal);
701	dTHX;	814	coro_mortal = 0;
702	Coro__State ctx = (Coro__State)arg;
703	JMPENV coro_start_env;
704
705	PL_top_env = &ctx->start_env;
706
707	ctx->cursp = 0;
708	PL_op = PL_op->op_next;
709	CALLRUNOPS(aTHX);
710
711	abort ();
712	}
713
714	STATIC void
715	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
716	{
717	dSTACKLEVEL;
718
719	if (prev != next)
720	{	815	}
721	if (next->mainstack)	816	}
		817
		818	static int
		819	runops_trace (pTHX)
		820	{
		821	COP *oldcop = 0;
		822	int oldcxix = -2;
		823	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		824	coro_cctx *cctx = coro->cctx;
		825
		826	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		827	{
		828	PERL_ASYNC_CHECK ();
		829
		830	if (cctx->flags & CC_TRACE_ALL)
722	{	831	{
723	LOCK;	832	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
724	SAVE (prev, flags);
725	LOAD (next);
726	UNLOCK;
727
728	/* mark this state as in-use */
729	next->mainstack = 0;
730	next->tmps_ix = -2;
731
732	/* stacklevel changed? if yes, grab the stack for us! */
733	if (flags & TRANSFER_SAVE_CCTXT)
734	{	833	{
735	if (!prev->stack)	834	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
736	allocate_stack (prev, 0);	835	SV **bot, **top;
737	else if (prev->cursp != stacklevel	836	AV *av = newAV (); /* return values */
738	&& prev->stack->usecnt > 1)	837	SV **cb;
		838	dSP;
		839
		840	GV *gv = CvGV (cx->blk_sub.cv);
		841	SV *fullname = sv_2mortal (newSV (0));
		842	if (isGV (gv))
		843	gv_efullname3 (fullname, gv, 0);
		844
		845	bot = PL_stack_base + cx->blk_oldsp + 1;
		846	top = cx->blk_gimme == G_ARRAY ? SP + 1
		847	: cx->blk_gimme == G_SCALAR ? bot + 1
		848	: bot;
		849
		850	av_extend (av, top - bot);
		851	while (bot < top)
		852	av_push (av, SvREFCNT_inc (*bot++));
		853
		854	PL_runops = RUNOPS_DEFAULT;
		855	ENTER;
		856	SAVETMPS;
		857	EXTEND (SP, 3);
		858	PUSHMARK (SP);
		859	PUSHs (&PL_sv_no);
		860	PUSHs (fullname);
		861	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		862	PUTBACK;
		863	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		864	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		865	SPAGAIN;
		866	FREETMPS;
		867	LEAVE;
		868	PL_runops = runops_trace;
		869	}
		870
		871	if (oldcop != PL_curcop)
		872	{
		873	oldcop = PL_curcop;
		874
		875	if (PL_curcop != &PL_compiling)
739	{	876	{
740	prev->gencnt = ++prev->stack->gencnt;	877	SV **cb;
741	prev->stack->usecnt = 1;
742	}
743		878
744	/* has our stack been invalidated? */	879	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
745	if (next->stack && next->stack->gencnt != next->gencnt)
746	{	880	{
747	deallocate_stack (next);	881	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
748	allocate_stack (next, 1);	882
749	coro_create (&(next->stack->cctx),	883	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
750	continue_coro, (void *)next,	884	{
751	next->stack->sptr, labs (next->stack->ssize));	885	runops_proc_t old_runops = PL_runops;
		886	dSP;
		887	GV *gv = CvGV (cx->blk_sub.cv);
		888	SV *fullname = sv_2mortal (newSV (0));
		889
		890	if (isGV (gv))
		891	gv_efullname3 (fullname, gv, 0);
		892
		893	PL_runops = RUNOPS_DEFAULT;
		894	ENTER;
		895	SAVETMPS;
		896	EXTEND (SP, 3);
		897	PUSHMARK (SP);
		898	PUSHs (&PL_sv_yes);
		899	PUSHs (fullname);
		900	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		901	PUTBACK;
		902	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		903	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		904	SPAGAIN;
		905	FREETMPS;
		906	LEAVE;
		907	PL_runops = runops_trace;
		908	}
		909
		910	oldcxix = cxstack_ix;
752	}	911	}
753		912
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	913	if (cctx->flags & CC_TRACE_LINE)
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	else
759	next->cursp = stacklevel;
760	}
761	else if (next->tmps_ix == -2)
762	croak ("tried to transfer to running coroutine");
763	else
764	{
765	LOCK;
766	SAVE (prev, -1); /* first get rid of the old state */
767	UNLOCK;
768
769	if (flags & TRANSFER_SAVE_CCTXT)
770	{
771	if (!prev->stack)
772	allocate_stack (prev, 0);
773
774	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
775	{	914	{
776	PL_top_env = &next->start_env;	915	dSP;
777		916
778	setup_coro (next);	917	PL_runops = RUNOPS_DEFAULT;
779	next->cursp = stacklevel;	918	ENTER;
780		919	SAVETMPS;
781	prev->stack->refcnt++;	920	EXTEND (SP, 3);
782	prev->stack->usecnt++;	921	PL_runops = RUNOPS_DEFAULT;
783	next->stack = prev->stack;	922	PUSHMARK (SP);
784	next->gencnt = prev->gencnt;	923	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		924	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		925	PUTBACK;
		926	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		927	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		928	SPAGAIN;
		929	FREETMPS;
		930	LEAVE;
		931	PL_runops = runops_trace;
785	}	932	}
786	else
787	{
788	assert (!next->stack);
789	allocate_stack (next, 1);
790	coro_create (&(next->stack->cctx),
791	setup_coro, (void *)next,
792	next->stack->sptr, labs (next->stack->ssize));
793	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
794	prev->cursp = stacklevel;
795	/* don't add any code here */
796	}	933	}
797	}	934	}
		935	}
		936	}
		937
		938	TAINT_NOT;
		939	return 0;
		940	}
		941
		942	/* inject a fake call to Coro::State::_cctx_init into the execution */
		943	/* _cctx_init should be careful, as it could be called at almost any time */
		944	/* during execution of a perl program */
		945	static void NOINLINE
		946	cctx_prepare (pTHX_ coro_cctx *cctx)
		947	{
		948	dSP;
		949	LOGOP myop;
		950
		951	PL_top_env = &PL_start_env;
		952
		953	if (cctx->flags & CC_TRACE)
		954	PL_runops = runops_trace;
		955
		956	Zero (&myop, 1, LOGOP);
		957	myop.op_next = PL_op;
		958	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		959
		960	PUSHMARK (SP);
		961	EXTEND (SP, 2);
		962	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		963	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		964	PUTBACK;
		965	PL_op = (OP *)&myop;
		966	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		967	SPAGAIN;
		968	}
		969
		970	/*
		971	* this is a _very_ stripped down perl interpreter ;)
		972	*/
		973	static void
		974	cctx_run (void *arg)
		975	{
		976	dTHX;
		977
		978	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		979	UNLOCK;
		980
		981	/* we now skip the entersub that lead to transfer() */
		982	PL_op = PL_op->op_next;
		983
		984	/* inject a fake subroutine call to cctx_init */
		985	cctx_prepare (aTHX_ (coro_cctx *)arg);
		986
		987	/* somebody or something will hit me for both perl_run and PL_restartop */
		988	PL_restartop = PL_op;
		989	perl_run (PL_curinterp);
		990
		991	/*
		992	* If perl-run returns we assume exit() was being called or the coro
		993	* fell off the end, which seems to be the only valid (non-bug)
		994	* reason for perl_run to return. We try to exit by jumping to the
		995	* bootstrap-time "top" top_env, as we cannot restore the "main"
		996	* coroutine as Coro has no such concept
		997	*/
		998	PL_top_env = main_top_env;
		999	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1000	}
		1001
		1002	static coro_cctx *
		1003	cctx_new ()
		1004	{
		1005	coro_cctx *cctx;
		1006	void *stack_start;
		1007	size_t stack_size;
		1008
		1009	++cctx_count;
		1010
		1011	Newz (0, cctx, 1, coro_cctx);
		1012
		1013	#if HAVE_MMAP
		1014	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1015	/* mmap supposedly does allocate-on-write for us */
		1016	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1017
		1018	if (cctx->sptr != (void *)-1)
		1019	{
		1020	# if CORO_STACKGUARD
		1021	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1022	# endif
		1023	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1024	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1025	cctx->flags |= CC_MAPPED;
		1026	}
		1027	else
		1028	#endif
		1029	{
		1030	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1031	New (0, cctx->sptr, coro_stacksize, long);
		1032
		1033	if (!cctx->sptr)
		1034	{
		1035	perror ("FATAL: unable to allocate stack for coroutine");
		1036	_exit (EXIT_FAILURE);
		1037	}
		1038
		1039	stack_start = cctx->sptr;
		1040	stack_size = cctx->ssize;
		1041	}
		1042
		1043	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1044	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1045
		1046	return cctx;
		1047	}
		1048
		1049	static void
		1050	cctx_destroy (coro_cctx *cctx)
		1051	{
		1052	if (!cctx)
		1053	return;
		1054
		1055	--cctx_count;
		1056
		1057	#if CORO_USE_VALGRIND
		1058	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1059	#endif
		1060
		1061	#if HAVE_MMAP
		1062	if (cctx->flags & CC_MAPPED)
		1063	munmap (cctx->sptr, cctx->ssize);
		1064	else
		1065	#endif
		1066	Safefree (cctx->sptr);
		1067
		1068	Safefree (cctx);
		1069	}
		1070
		1071	/* wether this cctx should be destructed */
		1072	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1073
		1074	static coro_cctx *
		1075	cctx_get (pTHX)
		1076	{
		1077	while (expect_true (cctx_first))
		1078	{
		1079	coro_cctx *cctx = cctx_first;
		1080	cctx_first = cctx->next;
		1081	--cctx_idle;
		1082
		1083	if (expect_true (!CCTX_EXPIRED (cctx)))
		1084	return cctx;
		1085
		1086	cctx_destroy (cctx);
		1087	}
		1088
		1089	return cctx_new ();
		1090	}
		1091
		1092	static void
		1093	cctx_put (coro_cctx *cctx)
		1094	{
		1095	/* free another cctx if overlimit */
		1096	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1097	{
		1098	coro_cctx *first = cctx_first;
		1099	cctx_first = first->next;
		1100	--cctx_idle;
		1101
		1102	cctx_destroy (first);
		1103	}
		1104
		1105	++cctx_idle;
		1106	cctx->next = cctx_first;
		1107	cctx_first = cctx;
		1108	}
		1109
		1110	/** coroutine switching *****************************************************/
		1111
		1112	static void
		1113	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1114	{
		1115	if (expect_true (prev != next))
		1116	{
		1117	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1118	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1119
		1120	if (expect_false (next->flags & CF_RUNNING))
		1121	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1122
		1123	if (expect_false (next->flags & CF_DESTROYED))
		1124	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1125
		1126	if (
		1127	#if PERL_VERSION_ATLEAST (5,9,0)
		1128	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
		1129	#else
		1130	expect_false (PL_lex_state != LEX_NOTPARSING)
		1131	#endif
		1132	)
		1133	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1134	}
		1135	}
		1136
		1137	/* always use the TRANSFER macro */
		1138	static void NOINLINE
		1139	transfer (pTHX_ struct coro *prev, struct coro *next)
		1140	{
		1141	dSTACKLEVEL;
		1142	static volatile int has_throw;
		1143
		1144	/* sometimes transfer is only called to set idle_sp */
		1145	if (expect_false (!next))
		1146	{
		1147	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1148	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1149	}
		1150	else if (expect_true (prev != next))
		1151	{
		1152	coro_cctx *prev__cctx;
		1153
		1154	if (expect_false (prev->flags & CF_NEW))
		1155	{
		1156	/* create a new empty context */
		1157	Newz (0, prev->cctx, 1, coro_cctx);
		1158	prev->flags &= ~CF_NEW;
		1159	prev->flags |= CF_RUNNING;
		1160	}
		1161
		1162	prev->flags &= ~CF_RUNNING;
		1163	next->flags |= CF_RUNNING;
		1164
		1165	LOCK;
		1166
		1167	/* first get rid of the old state */
		1168	save_perl (aTHX_ prev);
		1169
		1170	if (expect_false (next->flags & CF_NEW))
		1171	{
		1172	/* need to start coroutine */
		1173	next->flags &= ~CF_NEW;
		1174	/* setup coroutine call */
		1175	coro_setup (aTHX_ next);
		1176	}
798	else	1177	else
		1178	load_perl (aTHX_ next);
		1179
		1180	prev__cctx = prev->cctx;
		1181
		1182	/* possibly "free" the cctx */
		1183	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1184	{
		1185	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1186	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1187
		1188	prev->cctx = 0;
		1189
		1190	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1191	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1192	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1193	if (!next->cctx)
		1194	next->cctx = cctx_get (aTHX);
		1195
		1196	cctx_put (prev__cctx);
		1197	}
		1198
		1199	++next->usecount;
		1200
		1201	if (expect_true (!next->cctx))
		1202	next->cctx = cctx_get (aTHX);
		1203
		1204	has_throw = !!next->throw;
		1205
		1206	if (expect_false (prev__cctx != next->cctx))
		1207	{
		1208	prev__cctx->top_env = PL_top_env;
		1209	PL_top_env = next->cctx->top_env;
		1210	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1211	}
		1212
		1213	free_coro_mortal (aTHX);
		1214	UNLOCK;
		1215
		1216	if (expect_false (has_throw))
		1217	{
		1218	struct coro *coro = SvSTATE (coro_current);
		1219
		1220	if (coro->throw)
799	{	1221	{
		1222	SV *exception = coro->throw;
		1223	coro->throw = 0;
		1224	sv_setsv (ERRSV, exception);
800	setup_coro (next);	1225	croak (0);
801	next->cursp = stacklevel;
802	}	1226	}
803	}	1227	}
804	}	1228	}
		1229	}
		1230
		1231	struct transfer_args
		1232	{
		1233	struct coro *prev, *next;
		1234	};
		1235
		1236	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1237	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1238
		1239	/** high level stuff ********************************************************/
		1240
		1241	static int
		1242	coro_state_destroy (pTHX_ struct coro *coro)
		1243	{
		1244	if (coro->flags & CF_DESTROYED)
		1245	return 0;
		1246
		1247	coro->flags |= CF_DESTROYED;
		1248
		1249	if (coro->flags & CF_READY)
		1250	{
		1251	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1252	/* alternative: look through all ready queues and remove the coro */
		1253	LOCK;
		1254	--coro_nready;
		1255	UNLOCK;
		1256	}
		1257	else
		1258	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1259
		1260	if (coro->mainstack && coro->mainstack != main_mainstack)
		1261	{
		1262	struct coro temp;
		1263
		1264	if (coro->flags & CF_RUNNING)
		1265	croak ("FATAL: tried to destroy currently running coroutine");
		1266
		1267	save_perl (aTHX_ &temp);
		1268	load_perl (aTHX_ coro);
		1269
		1270	coro_destroy (aTHX_ coro);
		1271
		1272	load_perl (aTHX_ &temp);
		1273
		1274	coro->slot = 0;
		1275	}
		1276
		1277	cctx_destroy (coro->cctx);
		1278	SvREFCNT_dec (coro->args);
		1279
		1280	if (coro->next) coro->next->prev = coro->prev;
		1281	if (coro->prev) coro->prev->next = coro->next;
		1282	if (coro == coro_first) coro_first = coro->next;
		1283
		1284	return 1;
		1285	}
		1286
		1287	static int
		1288	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1289	{
		1290	struct coro *coro = (struct coro *)mg->mg_ptr;
		1291	mg->mg_ptr = 0;
		1292
		1293	coro->hv = 0;
		1294
		1295	if (--coro->refcnt < 0)
		1296	{
		1297	coro_state_destroy (aTHX_ coro);
		1298	Safefree (coro);
		1299	}
		1300
		1301	return 0;
		1302	}
		1303
		1304	static int
		1305	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1306	{
		1307	struct coro *coro = (struct coro *)mg->mg_ptr;
		1308
		1309	++coro->refcnt;
		1310
		1311	return 0;
		1312	}
		1313
		1314	static MGVTBL coro_state_vtbl = {
		1315	0, 0, 0, 0,
		1316	coro_state_free,
		1317	0,
		1318	#ifdef MGf_DUP
		1319	coro_state_dup,
		1320	#else
		1321	# define MGf_DUP 0
		1322	#endif
		1323	};
		1324
		1325	static void
		1326	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1327	{
		1328	ta->prev = SvSTATE (prev_sv);
		1329	ta->next = SvSTATE (next_sv);
		1330	TRANSFER_CHECK (*ta);
		1331	}
		1332
		1333	static void
		1334	api_transfer (SV *prev_sv, SV *next_sv)
		1335	{
		1336	dTHX;
		1337	struct transfer_args ta;
		1338
		1339	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1340	TRANSFER (ta);
		1341	}
		1342
		1343	/** Coro ********************************************************************/
		1344
		1345	static void
		1346	coro_enq (pTHX_ SV *coro_sv)
		1347	{
		1348	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1349	}
		1350
		1351	static SV *
		1352	coro_deq (pTHX)
		1353	{
		1354	int prio;
		1355
		1356	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1357	if (AvFILLp (coro_ready [prio]) >= 0)
		1358	return av_shift (coro_ready [prio]);
		1359
		1360	return 0;
		1361	}
		1362
		1363	static int
		1364	api_ready (SV *coro_sv)
		1365	{
		1366	dTHX;
		1367	struct coro *coro;
		1368
		1369	if (SvROK (coro_sv))
		1370	coro_sv = SvRV (coro_sv);
		1371
		1372	coro = SvSTATE (coro_sv);
		1373
		1374	if (coro->flags & CF_READY)
		1375	return 0;
		1376
		1377	coro->flags |= CF_READY;
805		1378
806	LOCK;	1379	LOCK;
807	if (coro_mortal)	1380	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
808	{	1381	++coro_nready;
809	SvREFCNT_dec (coro_mortal);
810	coro_mortal = 0;
811	}
812	UNLOCK;	1382	UNLOCK;
813	}
814		1383
815	#define SV_CORO(sv,func) \	1384	return 1;
816	do { \	1385	}
817	if (SvROK (sv)) \
818	sv = SvRV (sv); \
819	\
820	if (SvTYPE (sv) == SVt_PVHV) \
821	{ \
822	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
823	\
824	if (!he) \
825	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
826	\
827	(sv) = SvRV (HeVAL(he)); \
828	} \
829	\
830	/* must also be changed inside Coro::Cont::yield */ \
831	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
832	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
833	\
834	} while(0)
835		1386
836	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1387	static int
		1388	api_is_ready (SV *coro_sv)
		1389	{
		1390	dTHX;
		1391	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1392	}
837		1393
838	static void	1394	static void
839	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1395	prepare_schedule (pTHX_ struct transfer_args *ta)
840	{	1396	{
841	SV_CORO (prev, "Coro::transfer");	1397	SV *prev_sv, *next_sv;
842	SV_CORO (next, "Coro::transfer");
843		1398
844	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1399	for (;;)
845	}	1400	{
		1401	LOCK;
		1402	next_sv = coro_deq (aTHX);
846		1403
847	/** Coro ********************************************************************/	1404	/* nothing to schedule: call the idle handler */
		1405	if (expect_false (!next_sv))
		1406	{
		1407	dSP;
		1408	UNLOCK;
848		1409
849	#define PRIO_MAX 3	1410	ENTER;
850	#define PRIO_HIGH 1	1411	SAVETMPS;
851	#define PRIO_NORMAL 0
852	#define PRIO_LOW -1
853	#define PRIO_IDLE -3
854	#define PRIO_MIN -4
855		1412
856	/* for Coro.pm */	1413	PUSHMARK (SP);
857	static GV *coro_current, *coro_idle;	1414	PUTBACK;
858	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	1415	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
859	static int coro_nready;	1416	SPAGAIN;
		1417
		1418	FREETMPS;
		1419	LEAVE;
		1420	continue;
		1421	}
		1422
		1423	ta->next = SvSTATE (next_sv);
		1424
		1425	/* cannot transfer to destroyed coros, skip and look for next */
		1426	if (expect_false (ta->next->flags & CF_DESTROYED))
		1427	{
		1428	UNLOCK;
		1429	SvREFCNT_dec (next_sv);
		1430	/* coro_nready is already taken care of by destroy */
		1431	continue;
		1432	}
		1433
		1434	--coro_nready;
		1435	UNLOCK;
		1436	break;
		1437	}
		1438
		1439	/* free this only after the transfer */
		1440	prev_sv = SvRV (coro_current);
		1441	ta->prev = SvSTATE (prev_sv);
		1442	TRANSFER_CHECK (*ta);
		1443	assert (ta->next->flags & CF_READY);
		1444	ta->next->flags &= ~CF_READY;
		1445	SvRV_set (coro_current, next_sv);
		1446
		1447	LOCK;
		1448	free_coro_mortal (aTHX);
		1449	coro_mortal = prev_sv;
		1450	UNLOCK;
		1451	}
860		1452
861	static void	1453	static void
862	coro_enq (pTHX_ SV *sv)	1454	prepare_cede (pTHX_ struct transfer_args *ta)
863	{	1455	{
864	if (SvTYPE (sv) == SVt_PVHV)	1456	api_ready (coro_current);
865	{	1457	prepare_schedule (aTHX_ ta);
866	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	1458	}
867	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
868		1459
869	prio = prio > PRIO_MAX ? PRIO_MAX	1460	static int
870	: prio < PRIO_MIN ? PRIO_MIN	1461	prepare_cede_notself (pTHX_ struct transfer_args *ta)
871	: prio;	1462	{
872		1463	if (coro_nready)
873	av_push (coro_ready [prio - PRIO_MIN], sv);	1464	{
874	coro_nready++;	1465	SV *prev = SvRV (coro_current);
875		1466	prepare_schedule (aTHX_ ta);
		1467	api_ready (prev);
876	return;	1468	return 1;
877	}
878
879	croak ("Coro::ready tried to enqueue something that is not a coroutine");
880	}
881
882	static SV *
883	coro_deq (pTHX_ int min_prio)
884	{
885	int prio = PRIO_MAX - PRIO_MIN;
886
887	min_prio -= PRIO_MIN;
888	if (min_prio < 0)
889	min_prio = 0;
890
891	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
892	if (av_len (coro_ready[prio]) >= 0)
893	{
894	coro_nready--;
895	return av_shift (coro_ready[prio]);
896	}	1469	}
897		1470	else
898	return 0;	1471	return 0;
899	}
900
901	static void
902	api_ready (SV *coro)
903	{
904	dTHX;
905
906	if (SvROK (coro))
907	coro = SvRV (coro);
908
909	LOCK;
910	coro_enq (aTHX_ SvREFCNT_inc (coro));
911	UNLOCK;
912	}	1472	}
913		1473
914	static void	1474	static void
915	api_schedule (void)	1475	api_schedule (void)
916	{	1476	{
917	dTHX;	1477	dTHX;
		1478	struct transfer_args ta;
918		1479
919	SV *prev, *next;	1480	prepare_schedule (aTHX_ &ta);
		1481	TRANSFER (ta);
		1482	}
920		1483
921	LOCK;	1484	static int
		1485	api_cede (void)
		1486	{
		1487	dTHX;
		1488	struct transfer_args ta;
922		1489
923	prev = SvRV (GvSV (coro_current));	1490	prepare_cede (aTHX_ &ta);
924	next = coro_deq (aTHX_ PRIO_MIN);
925		1491
926	if (!next)	1492	if (expect_true (ta.prev != ta.next))
927	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1493	{
		1494	TRANSFER (ta);
		1495	return 1;
		1496	}
		1497	else
		1498	return 0;
		1499	}
928		1500
929	/* free this only after the transfer */	1501	static int
930	coro_mortal = prev;	1502	api_cede_notself (void)
931	SV_CORO (prev, "Coro::schedule");	1503	{
		1504	dTHX;
		1505	struct transfer_args ta;
932		1506
933	SvRV (GvSV (coro_current)) = next;	1507	if (prepare_cede_notself (aTHX_ &ta))
934		1508	{
935	SV_CORO (next, "Coro::schedule");	1509	TRANSFER (ta);
936		1510	return 1;
937	UNLOCK;	1511	}
938		1512	else
939	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1513	return 0;
940	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
941	}	1514	}
942		1515
943	static void	1516	static void
944	api_cede (void)	1517	api_trace (SV *coro_sv, int flags)
945	{	1518	{
946	dTHX;	1519	dTHX;
		1520	struct coro *coro = SvSTATE (coro_sv);
947		1521
948	LOCK;	1522	if (flags & CC_TRACE)
949	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1523	{
950	UNLOCK;	1524	if (!coro->cctx)
		1525	coro->cctx = cctx_new ();
		1526	else if (!(coro->cctx->flags & CC_TRACE))
		1527	croak ("cannot enable tracing on coroutine with custom stack");
951		1528
952	api_schedule ();	1529	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
953	}	1530	}
		1531	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1532	{
		1533	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
954		1534
		1535	if (coro->flags & CF_RUNNING)
		1536	PL_runops = RUNOPS_DEFAULT;
		1537	else
		1538	coro->slot->runops = RUNOPS_DEFAULT;
		1539	}
		1540	}
		1541
955	MODULE = Coro::State PACKAGE = Coro::State	1542	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956		1543
957	PROTOTYPES: ENABLE	1544	PROTOTYPES: DISABLE
958		1545
959	BOOT:	1546	BOOT:
960	{ /* {} necessary for stoopid perl-5.6.x */	1547	{
961	#ifdef USE_ITHREADS	1548	#ifdef USE_ITHREADS
962	MUTEX_INIT (&coro_mutex);	1549	MUTEX_INIT (&coro_mutex);
963	#endif	1550	#endif
		1551	BOOT_PAGESIZE;
964		1552
965	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1553	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
966	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1554	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1555
		1556	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1557	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1558	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1559	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1560
		1561	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1562	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1563	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1564
967	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1565	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
968		1566
969	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1567	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
970	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1568	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
971	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1569	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
972	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1570	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
973		1571
974	main_mainstack = PL_mainstack;	1572	main_mainstack = PL_mainstack;
		1573	main_top_env = PL_top_env;
		1574
		1575	while (main_top_env->je_prev)
		1576	main_top_env = main_top_env->je_prev;
975		1577
976	coroapi.ver = CORO_API_VERSION;	1578	coroapi.ver = CORO_API_VERSION;
		1579	coroapi.rev = CORO_API_REVISION;
977	coroapi.transfer = api_transfer;	1580	coroapi.transfer = api_transfer;
978	}
979		1581
980	Coro::State	1582	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
981	_newprocess(args)	1583	}
982	SV * args	1584
983	PROTOTYPE: $	1585	SV *
		1586	new (char *klass, ...)
984	CODE:	1587	CODE:
985	Coro__State coro;	1588	{
		1589	struct coro *coro;
		1590	MAGIC *mg;
		1591	HV *hv;
		1592	int i;
986		1593
987	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
988	croak ("Coro::State::_newprocess expects an arrayref");
989
990	Newz (0, coro, 1, struct coro);	1594	Newz (0, coro, 1, struct coro);
		1595	coro->args = newAV ();
		1596	coro->flags = CF_NEW;
991		1597
992	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1598	if (coro_first) coro_first->prev = coro;
993	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1599	coro->next = coro_first;
994	/*coro->stack = 0;*/	1600	coro_first = coro;
995		1601
996	/* same as JMPENV_BOOTSTRAP */	1602	coro->hv = hv = newHV ();
997	/* we might be able to recycle start_env, but safe is safe */	1603	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
998	/*Zero(&coro->start_env, 1, JMPENV);*/	1604	mg->mg_flags |= MGf_DUP;
999	coro->start_env.je_ret = -1;	1605	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1000	coro->start_env.je_mustcatch = TRUE;
1001		1606
1002	RETVAL = coro;	1607	av_extend (coro->args, items - 1);
		1608	for (i = 1; i < items; i++)
		1609	av_push (coro->args, newSVsv (ST (i)));
		1610	}
1003	OUTPUT:	1611	OUTPUT:
1004	RETVAL	1612	RETVAL
1005		1613
		1614	# these not obviously related functions are all rolled into the same xs
		1615	# function to increase chances that they all will call transfer with the same
		1616	# stack offset
1006	void	1617	void
1007	transfer(prev, next, flags)	1618	_set_stacklevel (...)
1008	SV *prev	1619	ALIAS:
1009	SV *next	1620	Coro::State::transfer = 1
1010	int flags	1621	Coro::schedule = 2
1011	PROTOTYPE: @	1622	Coro::cede = 3
		1623	Coro::cede_notself = 4
1012	CODE:	1624	CODE:
		1625	{
		1626	struct transfer_args ta;
		1627
1013	PUTBACK;	1628	PUTBACK;
1014	SV_CORO (next, "Coro::transfer");	1629	switch (ix)
1015	SV_CORO (prev, "Coro::transfer");	1630	{
1016	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1631	case 0:
		1632	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1633	ta.next = 0;
		1634	break;
		1635
		1636	case 1:
		1637	if (items != 2)
		1638	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1639
		1640	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1641	break;
		1642
		1643	case 2:
		1644	prepare_schedule (aTHX_ &ta);
		1645	break;
		1646
		1647	case 3:
		1648	prepare_cede (aTHX_ &ta);
		1649	break;
		1650
		1651	case 4:
		1652	if (!prepare_cede_notself (aTHX_ &ta))
		1653	XSRETURN_EMPTY;
		1654
		1655	break;
		1656	}
1017	SPAGAIN;	1657	SPAGAIN;
1018		1658
		1659	BARRIER;
		1660	PUTBACK;
		1661	TRANSFER (ta);
		1662	SPAGAIN; /* might be the sp of a different coroutine now */
		1663	/* be extra careful not to ever do anything after TRANSFER */
		1664	}
		1665
		1666	bool
		1667	_destroy (SV *coro_sv)
		1668	CODE:
		1669	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1670	OUTPUT:
		1671	RETVAL
		1672
1019	void	1673	void
1020	DESTROY(coro)
1021	Coro::State coro
1022	CODE:
1023
1024	if (coro->mainstack && coro->mainstack != main_mainstack)
1025	{
1026	struct coro temp;
1027
1028	PUTBACK;
1029	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1030	LOAD (aTHX_ coro);
1031	SPAGAIN;
1032
1033	destroy_stacks (aTHX);
1034
1035	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1036	SPAGAIN;
1037
1038	coro->mainstack = 0;
1039	}
1040
1041	deallocate_stack (coro);
1042	SvREFCNT_dec (coro->args);
1043	Safefree (coro);
1044
1045	void
1046	_exit(code)	1674	_exit (code)
1047	int code	1675	int code
1048	PROTOTYPE: $	1676	PROTOTYPE: $
1049	CODE:	1677	CODE:
1050	_exit (code);	1678	_exit (code);
1051		1679
1052	MODULE = Coro::State PACKAGE = Coro::Cont	1680	int
		1681	cctx_stacksize (int new_stacksize = 0)
		1682	CODE:
		1683	RETVAL = coro_stacksize;
		1684	if (new_stacksize)
		1685	coro_stacksize = new_stacksize;
		1686	OUTPUT:
		1687	RETVAL
1053		1688
1054	# this is slightly dirty (should expose a c-level api)	1689	int
		1690	cctx_count ()
		1691	CODE:
		1692	RETVAL = cctx_count;
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	int
		1697	cctx_idle ()
		1698	CODE:
		1699	RETVAL = cctx_idle;
		1700	OUTPUT:
		1701	RETVAL
1055		1702
1056	void	1703	void
1057	yield(...)	1704	list ()
1058	PROTOTYPE: @	1705	PPCODE:
		1706	{
		1707	struct coro *coro;
		1708	for (coro = coro_first; coro; coro = coro->next)
		1709	if (coro->hv)
		1710	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1711	}
		1712
		1713	void
		1714	call (Coro::State coro, SV *coderef)
		1715	ALIAS:
		1716	eval = 1
		1717	CODE:
		1718	{
		1719	if (coro->mainstack)
		1720	{
		1721	struct coro temp;
		1722
		1723	if (!(coro->flags & CF_RUNNING))
		1724	{
		1725	PUTBACK;
		1726	save_perl (aTHX_ &temp);
		1727	load_perl (aTHX_ coro);
		1728	}
		1729
		1730	{
		1731	dSP;
		1732	ENTER;
		1733	SAVETMPS;
		1734	PUTBACK;
		1735	PUSHSTACK;
		1736	PUSHMARK (SP);
		1737
		1738	if (ix)
		1739	eval_sv (coderef, 0);
		1740	else
		1741	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1742
		1743	POPSTACK;
		1744	SPAGAIN;
		1745	FREETMPS;
		1746	LEAVE;
		1747	PUTBACK;
		1748	}
		1749
		1750	if (!(coro->flags & CF_RUNNING))
		1751	{
		1752	save_perl (aTHX_ coro);
		1753	load_perl (aTHX_ &temp);
		1754	SPAGAIN;
		1755	}
		1756	}
		1757	}
		1758
		1759	SV *
		1760	is_ready (Coro::State coro)
		1761	PROTOTYPE: $
		1762	ALIAS:
		1763	is_ready = CF_READY
		1764	is_running = CF_RUNNING
		1765	is_new = CF_NEW
		1766	is_destroyed = CF_DESTROYED
		1767	CODE:
		1768	RETVAL = boolSV (coro->flags & ix);
		1769	OUTPUT:
		1770	RETVAL
		1771
		1772	void
		1773	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1774
		1775	SV *
		1776	has_stack (Coro::State coro)
		1777	PROTOTYPE: $
		1778	CODE:
		1779	RETVAL = boolSV (!!coro->cctx);
		1780	OUTPUT:
		1781	RETVAL
		1782
		1783	int
		1784	is_traced (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	IV
		1792	rss (Coro::State coro)
		1793	PROTOTYPE: $
		1794	ALIAS:
		1795	usecount = 1
1059	CODE:	1796	CODE:
1060	SV *yieldstack;	1797	switch (ix)
1061	SV *sv;	1798	{
1062	AV *defav = GvAV (PL_defgv);	1799	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1063	struct coro *prev, *next;	1800	case 1: RETVAL = coro->usecount; break;
1064
1065	yieldstack = *hv_fetch (
1066	(HV *)SvRV (GvSV (coro_current)),
1067	"yieldstack", sizeof ("yieldstack") - 1,
1068	0	1801	}
1069	);	1802	OUTPUT:
		1803	RETVAL
1070		1804
1071	/* set up @_ -- ugly */
1072	av_clear (defav);
1073	av_fill (defav, items - 1);
1074	while (items--)
1075	av_store (defav, items, SvREFCNT_inc (ST(items)));
1076
1077	sv = av_pop ((AV *)SvRV (yieldstack));
1078	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1079	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1080	SvREFCNT_dec (sv);
1081
1082	transfer (aTHX_ prev, next, 0);
1083		1805
1084	MODULE = Coro::State PACKAGE = Coro	1806	MODULE = Coro::State PACKAGE = Coro
1085		1807
1086	# this is slightly dirty (should expose a c-level api)
1087
1088	BOOT:	1808	BOOT:
1089	{	1809	{
1090	int i;	1810	int i;
		1811
		1812	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1813	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1814	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1815
		1816	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1817	SvREADONLY_on (coro_current);
		1818
1091	HV *stash = gv_stashpv ("Coro", TRUE);	1819	coro_stash = gv_stashpv ("Coro", TRUE);
1092		1820
1093	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1821	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1094	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1822	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1095	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1823	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1096	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1824	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1097	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1825	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1098	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1826	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1099
1100	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1101	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1102		1827
1103	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1828	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1104	coro_ready[i] = newAV ();	1829	coro_ready[i] = newAV ();
1105		1830
1106	{	1831	{
1107	SV *sv = perl_get_sv("Coro::API", 1);	1832	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1833	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1108		1834
1109	coroapi.schedule = api_schedule;	1835	coroapi.schedule = api_schedule;
1110	coroapi.cede = api_cede;	1836	coroapi.cede = api_cede;
		1837	coroapi.cede_notself = api_cede_notself;
1111	coroapi.ready = api_ready;	1838	coroapi.ready = api_ready;
		1839	coroapi.is_ready = api_is_ready;
1112	coroapi.nready = &coro_nready;	1840	coroapi.nready = &coro_nready;
1113	coroapi.current = coro_current;	1841	coroapi.current = coro_current;
1114		1842
1115	GCoroAPI = &coroapi;	1843	GCoroAPI = &coroapi;
1116	sv_setiv(sv, (IV)&coroapi);	1844	sv_setiv (sv, (IV)&coroapi);
1117	SvREADONLY_on(sv);	1845	SvREADONLY_on (sv);
1118	}	1846	}
1119	}	1847	}
1120		1848
1121	#if !PERL_MICRO
1122
1123	void	1849	void
1124	ready(self)	1850	_set_current (SV *current)
1125	SV * self
1126	PROTOTYPE: $	1851	PROTOTYPE: $
1127	CODE:	1852	CODE:
1128	api_ready (self);	1853	SvREFCNT_dec (SvRV (coro_current));
1129		1854	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1130	#endif
1131		1855
1132	int	1856	int
		1857	prio (Coro::State coro, int newprio = 0)
		1858	ALIAS:
		1859	nice = 1
		1860	CODE:
		1861	{
		1862	RETVAL = coro->prio;
		1863
		1864	if (items > 1)
		1865	{
		1866	if (ix)
		1867	newprio = coro->prio - newprio;
		1868
		1869	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1870	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1871
		1872	coro->prio = newprio;
		1873	}
		1874	}
		1875	OUTPUT:
		1876	RETVAL
		1877
		1878	SV *
		1879	ready (SV *self)
		1880	PROTOTYPE: $
		1881	CODE:
		1882	RETVAL = boolSV (api_ready (self));
		1883	OUTPUT:
		1884	RETVAL
		1885
		1886	int
1133	nready(...)	1887	nready (...)
1134	PROTOTYPE:	1888	PROTOTYPE:
1135	CODE:	1889	CODE:
1136	RETVAL = coro_nready;	1890	RETVAL = coro_nready;
1137	OUTPUT:	1891	OUTPUT:
1138	RETVAL	1892	RETVAL
1139		1893
1140	void	1894	void
1141	schedule(...)	1895	throw (Coro::State self, SV *throw = &PL_sv_undef)
1142	PROTOTYPE:	1896	PROTOTYPE: $;$
		1897	CODE:
		1898	SvREFCNT_dec (self->throw);
		1899	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1900
		1901	# for async_pool speedup
		1902	void
		1903	_pool_1 (SV *cb)
1143	CODE:	1904	CODE:
1144	api_schedule ();	1905	{
		1906	struct coro *coro = SvSTATE (coro_current);
		1907	HV *hv = (HV *)SvRV (coro_current);
		1908	AV *defav = GvAV (PL_defgv);
		1909	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1910	AV *invoke_av;
		1911	int i, len;
		1912
		1913	if (!invoke)
		1914	{
		1915	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1916	croak ("\3async_pool terminate\2\n");
		1917	}
		1918
		1919	SvREFCNT_dec (coro->saved_deffh);
		1920	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1921
		1922	hv_store (hv, "desc", sizeof ("desc") - 1,
		1923	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1924
		1925	invoke_av = (AV *)SvRV (invoke);
		1926	len = av_len (invoke_av);
		1927
		1928	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1929
		1930	if (len > 0)
		1931	{
		1932	av_fill (defav, len - 1);
		1933	for (i = 0; i < len; ++i)
		1934	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1935	}
		1936
		1937	SvREFCNT_dec (invoke);
		1938	}
1145		1939
1146	void	1940	void
1147	cede(...)	1941	_pool_2 (SV *cb)
1148	PROTOTYPE:
1149	CODE:	1942	CODE:
1150	api_cede ();	1943	{
		1944	struct coro *coro = SvSTATE (coro_current);
1151		1945
1152	# and these are hacks	1946	sv_setsv (cb, &PL_sv_undef);
		1947
		1948	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1949	coro->saved_deffh = 0;
		1950
		1951	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1952	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1953	{
		1954	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1955	croak ("\3async_pool terminate\2\n");
		1956	}
		1957
		1958	av_clear (GvAV (PL_defgv));
		1959	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1961
		1962	coro->prio = 0;
		1963
		1964	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1965	api_trace (coro_current, 0);
		1966
		1967	av_push (av_async_pool, newSVsv (coro_current));
		1968	}
		1969
		1970
		1971	MODULE = Coro::State PACKAGE = Coro::AIO
		1972
1153	SV *	1973	SV *
1154	_aio_get_state ()	1974	_get_state ()
1155	CODE:	1975	CODE:
1156	{	1976	{
1157	struct {	1977	struct io_state *data;
1158	int errorno;
1159	int laststype;
1160	int laststatval;
1161	Stat_t statcache;
1162	} data;
1163		1978
		1979	RETVAL = newSV (sizeof (struct io_state));
		1980	data = (struct io_state *)SvPVX (RETVAL);
		1981	SvCUR_set (RETVAL, sizeof (struct io_state));
		1982	SvPOK_only (RETVAL);
		1983
1164	data.errorno = errno;	1984	data->errorno = errno;
1165	data.laststype = PL_laststype;	1985	data->laststype = PL_laststype;
1166	data.laststatval = PL_laststatval;	1986	data->laststatval = PL_laststatval;
1167	data.statcache = PL_statcache;	1987	data->statcache = PL_statcache;
1168
1169	RETVAL = newSVpvn ((char *)&data, sizeof data);
1170	}	1988	}
1171	OUTPUT:	1989	OUTPUT:
1172	RETVAL	1990	RETVAL
1173		1991
1174	void	1992	void
1175	_aio_set_state (char *data_)	1993	_set_state (char *data_)
1176	PROTOTYPE: $	1994	PROTOTYPE: $
1177	CODE:	1995	CODE:
1178	{	1996	{
1179	struct {	1997	struct io_state *data = (void *)data_;
1180	int errorno;
1181	int laststype;
1182	int laststatval;
1183	Stat_t statcache;
1184	} *data = (void *)data_;
1185		1998
1186	errno = data->errorno;	1999	errno = data->errorno;
1187	PL_laststype = data->laststype;	2000	PL_laststype = data->laststype;
1188	PL_laststatval = data->laststatval;	2001	PL_laststatval = data->laststatval;
1189	PL_statcache = data->statcache;	2002	PL_statcache = data->statcache;
1190	}	2003	}
		2004

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