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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.30 by root, Sat Aug 25 22:19:05 2001 UTC vs.
Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
		5
1	#include "EXTERN.h"	6	#include "EXTERN.h"
2	#include "perl.h"	7	#include "perl.h"
3	#include "XSUB.h"	8	#include "XSUB.h"
4		9
5	#include "libcoro/coro.c"	10	#include "patchlevel.h"
6		11
7	#include <signal.h>	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
8		15
9	#ifdef HAVE_MMAP	16	#ifdef HAVE_MMAP
10	# include <unistd.h>	17	# include <unistd.h>
11	# include <sys/mman.h>	18	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	19	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	20	# ifdef MAP_ANON
		21	# define MAP_ANONYMOUS MAP_ANON
15	# else	22	# else
16	# undef HAVE_MMAP	23	# undef HAVE_MMAP
17	# endif	24	# endif
18	# endif	25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
19	#endif	33	# endif
		34	#else
		35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
20		38
21	#define MAY_FLUSH /* increases codesize and is rarely used */	39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
22		45
23	#define SUB_INIT "Coro::State::initialize"	46	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	47	#define MAX_IDLE_CCTX 8
25		48
26	/* The next macro should declare a variable stacklevel that contains and approximation	49	#define PERL_VERSION_ATLEAST(a,b,c) \
27	* to the current C stack pointer. Its property is that it changes with each call	50	(PERL_REVISION > (a) \
28	* and should be unique. */	51	\|\| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
		56	# ifndef PL_ppaddr
		57	# define PL_ppaddr ppaddr
		58	# endif
		59	# ifndef call_sv
		60	# define call_sv perl_call_sv
		61	# endif
		62	# ifndef get_sv
		63	# define get_sv perl_get_sv
		64	# endif
		65	# ifndef get_cv
		66	# define get_cv perl_get_cv
		67	# endif
		68	# ifndef IS_PADGV
		69	# define IS_PADGV(v) 0
		70	# endif
		71	# ifndef IS_PADCONST
		72	# define IS_PADCONST(v) 0
		73	# endif
		74	#endif
		75
		76	/* 5.8.7 */
		77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
		89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		90	# undef CORO_STACKGUARD
		91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
		104	#define dSTACKLEVEL volatile char stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
30		106
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		108
		109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
32		123
33	#include "CoroAPI.h"	124	#include "CoroAPI.h"
34		125
		126	#ifdef USE_ITHREADS
		127	static perl_mutex coro_mutex;
		128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		130	#else
		131	# define LOCK (void)0
		132	# define UNLOCK (void)0
		133	#endif
		134
		135	/* helper storage struct for Coro::AIO */
		136	struct io_state
		137	{
		138	int errorno;
		139	I32 laststype;
		140	int laststatval;
		141	Stat_t statcache;
		142	};
		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
35	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
		146	static AV main_mainstack; / used to differentiate between $main and others */
		147	static JMPENV *main_top_env;
		148	static HV coro_state_stash, coro_stash;
		149	static SV coro_mortal; / will be freed after next transfer */
36		150
37	/* this is actually not only the c stack but also c registers etc... */	151	static GV irsgv; / $/ */
		152	static GV stdoutgv; / STDOUT /
		153	static SV *sv_diehook;
		154	static SV *sv_warnhook;
		155
		156	/* async_pool helper stuff */
		157	static SV *sv_pool_rss;
		158	static SV *sv_pool_size;
		159	static AV *av_async_pool;
		160
		161	static struct coro_cctx *cctx_first;
		162	static int cctx_count, cctx_idle;
		163
		164	enum {
		165	CC_MAPPED = 0x01,
		166	CC_NOREUSE = 0x02, /* throw this away after tracing */
		167	CC_TRACE = 0x04,
		168	CC_TRACE_SUB = 0x08, /* trace sub calls */
		169	CC_TRACE_LINE = 0x10, /* trace each statement */
		170	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		171	};
		172
		173	/* this is a structure representing a c-level coroutine */
		174	typedef struct coro_cctx {
		175	struct coro_cctx *next;
		176
		177	/* the stack */
		178	void *sptr;
		179	size_t ssize;
		180
		181	/* cpu state */
		182	void idle_sp; / sp of top-level transfer/schedule/cede call */
		183	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		184	JMPENV *top_env;
		185	coro_context cctx;
		186
		187	#if CORO_USE_VALGRIND
		188	int valgrind_id;
		189	#endif
		190	unsigned char flags;
		191	} coro_cctx;
		192
		193	enum {
		194	CF_RUNNING = 0x0001, /* coroutine is running */
		195	CF_READY = 0x0002, /* coroutine is ready */
		196	CF_NEW = 0x0004, /* has never been switched to */
		197	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		198	};
		199
		200	/* the structure where most of the perl state is stored, overlaid on the cxstack */
38	typedef struct {	201	typedef struct {
39	int refcnt; /* pointer reference counter */	202	SV *defsv;
40	int usecnt; /* shared by how many coroutines */	203	AV *defav;
41	int gencnt; /* generation counter */	204	SV *errsv;
		205	SV *irsgv;
		206	#define VAR(name,type) type name;
		207	# include "state.h"
		208	#undef VAR
		209	} perl_slots;
42		210
43	coro_context cctx;	211	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
44		212
45	void *sptr;	213	/* this is a structure representing a perl-level coroutine */
46	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48
49	struct coro {	214	struct coro {
50	/* the optional C context */	215	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	216	coro_cctx *cctx;
52	void *cursp;
53	int gencnt;
54		217
55	/* optionally saved, might be zero */	218	/* process data */
56	AV *defav;
57	SV *defsv;
58	SV *errsv;
59
60	/* saved global state not related to stacks */
61	U8 dowarn;
62	I32 in_eval;
63
64	/* the stacks and related info (callchain etc..) */
65	PERL_SI *curstackinfo;
66	AV *curstack;
67	AV *mainstack;	219	AV *mainstack;
68	SV **stack_sp;	220	perl_slots slot; / basically the saved sp */
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91		221
92	/* data associated with this coroutine (initial args) */	222	/* data associated with this coroutine (initial args) */
93	AV *args;	223	AV *args;
		224	int refcnt;
		225	int flags; /* CF_ flags */
		226
		227	/* statistics */
		228	int usecount; /* number of transfers to this coro */
		229
		230	/* coro process data */
		231	int prio;
		232	SV *throw;
		233
		234	/* async_pool */
		235	SV *saved_deffh;
		236
		237	/* linked list */
		238	struct coro next, prev;
		239	HV hv; / the perl hash associated with this coro, if any */
94	};	240	};
95		241
96	typedef struct coro *Coro__State;	242	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	243	typedef struct coro *Coro__State_or_hashref;
98
99	static AV main_mainstack; / used to differentiate between $main and others */
100	static HV *coro_state_stash;
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104
105	/* mostly copied from op.c:cv_clone2 */
106	STATIC AV *
107	clone_padlist (AV *protopadlist)
108	{
109	AV *av;
110	I32 ix;
111	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
112	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV newpadlist, newpad_name, *newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127
128	newpadlist = newAV ();
129	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);
131	av_store (newpadlist, 1, (SV *) newpad);
132
133	av = newAV (); /* will be @_ */
134	av_extend (av, 0);
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137
138	for (ix = fpad; ix > 0; ix--)
139	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141	if (namesv && namesv != &PL_sv_undef)
142	{
143	char name = SvPVX (namesv); / XXX */
144	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}
148	else
149	{ /* our own lexical */
150	SV *sv;
151	if (*name == '&')
152	sv = SvREFCNT_inc (ppad[ix]);
153	else if (*name == '@')
154	sv = (SV *) newAV ();
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}
163	}
164	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
165	{
166	npad[ix] = SvREFCNT_inc (ppad[ix]);
167	}
168	else
169	{
170	SV *sv = NEWSV (0, 0);
171	SvPADTMP_on (sv);
172	npad[ix] = sv;
173	}
174	}
175
176	#if 0 /* return -ENOTUNDERSTOOD */
177	/* Now that vars are all in place, clone nested closures. */
178
179	for (ix = fpad; ix > 0; ix--) {
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181	if (namesv
182	&& namesv != &PL_sv_undef
183	&& !(SvFLAGS(namesv) & SVf_FAKE)
184	&& *SvPVX(namesv) == '&'
185	&& CvCLONE(ppad[ix]))
186	{
187	CV kid = cv_clone((CV)ppad[ix]);
188	SvREFCNT_dec(ppad[ix]);
189	CvCLONE_on(kid);
190	SvPADMY_on(kid);
191	npad[ix] = (SV*)kid;
192	}
193	}
194	#endif
195
196	return newpadlist;
197	}
198
199	#ifdef MAY_FLUSH
200	STATIC void
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV sv = svp ? svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214
215	SvREFCNT_dec((SV*)padlist);
216	}
217	}
218	#endif
219
220	/* the next two functions merely cache the padlists */
221	STATIC void
222	get_padlist (CV *cv)
223	{
224	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
225
226	if (he && AvFILLp ((AV )he) >= 0)
227	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
228	else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230	}
231
232	STATIC void
233	put_padlist (CV *cv)
234	{
235	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
236
237	if (SvTYPE (*he) != SVt_PVAV)
238	{
239	SvREFCNT_dec (*he);
240	he = (SV )newAV ();
241	}
242
243	av_push ((AV )he, (SV *)CvPADLIST (cv));
244	}
245
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{
255	HE *he;
256	AV *padlist;
257
258	while (!!(he = hv_iternext (hv)))
259	{
260	AV av = (AV )HeVAL(he);
261
262	/* casting is fun. */
263	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
264	free_padlist (padlist);
265	}
266	}
267
268	SvREFCNT_dec (hv);
269	}
270	#endif
271
272	#define SB do {
273	#define SE } while (0)
274
275	#define LOAD(state) load_state(aTHX_ (state));
276	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280	static void
281	load_state(pTHX_ Coro__State c)
282	{
283	PL_dowarn = c->dowarn;
284	PL_in_eval = c->in_eval;
285
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317	{
318	dSP;
319	CV *cv;
320
321	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))
323	{
324	AV padlist = (AV )POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;
330	#ifdef USE_THREADS
331	/CvOWNER(cv) = (struct perl_thread )POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}
337
338	PUTBACK;
339	}
340	}
341
342	static void
343	save_state(pTHX_ Coro__State c, int flags)
344	{
345	{
346	dSP;
347	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;
349	PERL_SI *top_si = PL_curstackinfo;
350
351	/*
352	* the worst thing you can imagine happens first - we have to save
353	* (and reinitialize) all cv's in the whole callchain :(
354	*/
355
356	PUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */
358	for (;;)
359	{
360	while (cxix >= 0)
361	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];
363
364	if (CxTYPE(cx) == CXt_SUB)
365	{
366	CV *cv = cx->blk_sub.cv;
367	if (CvDEPTH(cv))
368	{
369	#ifdef USE_THREADS
370	/XPUSHs ((SV )CvOWNER(cv));*/
371	/CvOWNER(cv) = 0;/
372	/error must unlock this cv etc.. etc.../
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);
375
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382
383	PUSHs ((SV *)CvPADLIST(cv));
384	PUSHs ((SV *)cv);
385
386	get_padlist (cv); /* this is a monster */
387	}
388	}
389	else if (CxTYPE(cx) == CXt_FORMAT)
390	{
391	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}
395	}
396
397	if (top_si->si_type == PERLSI_MAIN)
398	break;
399
400	top_si = top_si->si_prev;
401	ccstk = top_si->si_cxstack;
402	cxix = top_si->si_cxix;
403	}
404
405	PUTBACK;
406	}
407
408	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
409	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
410	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
411
412	c->dowarn = PL_dowarn;
413	c->in_eval = PL_in_eval;
414
415	c->curstackinfo = PL_curstackinfo;
416	c->curstack = PL_curstack;
417	c->mainstack = PL_mainstack;
418	c->stack_sp = PL_stack_sp;
419	c->op = PL_op;
420	c->curpad = PL_curpad;
421	c->stack_base = PL_stack_base;
422	c->stack_max = PL_stack_max;
423	c->tmps_stack = PL_tmps_stack;
424	c->tmps_floor = PL_tmps_floor;
425	c->tmps_ix = PL_tmps_ix;
426	c->tmps_max = PL_tmps_max;
427	c->markstack = PL_markstack;
428	c->markstack_ptr = PL_markstack_ptr;
429	c->markstack_max = PL_markstack_max;
430	c->scopestack = PL_scopestack;
431	c->scopestack_ix = PL_scopestack_ix;
432	c->scopestack_max = PL_scopestack_max;
433	c->savestack = PL_savestack;
434	c->savestack_ix = PL_savestack_ix;
435	c->savestack_max = PL_savestack_max;
436	c->retstack = PL_retstack;
437	c->retstack_ix = PL_retstack_ix;
438	c->retstack_max = PL_retstack_max;
439	c->curcop = PL_curcop;
440	c->top_env = PL_top_env;
441	}
442
443	/*
444	* allocate various perl stacks. This is an exact copy
445	* of perl.c:init_stacks, except that it uses less memory
446	* on the assumption that coroutines do not usually need
447	* a lot of stackspace.
448	*/
449	STATIC void
450	coro_init_stacks (pTHX)
451	{
452	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
453	PL_curstackinfo->si_type = PERLSI_MAIN;
454	PL_curstack = PL_curstackinfo->si_stack;
455	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456
457	PL_stack_base = AvARRAY(PL_curstack);
458	PL_stack_sp = PL_stack_base;
459	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460
461	New(50,PL_tmps_stack,96,SV*);
462	PL_tmps_floor = -1;
463	PL_tmps_ix = -1;
464	PL_tmps_max = 96;
465
466	New(54,PL_markstack,16,I32);
467	PL_markstack_ptr = PL_markstack;
468	PL_markstack_max = PL_markstack + 16;
469
470	SET_MARK_OFFSET;
471
472	New(54,PL_scopestack,16,I32);
473	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;
475
476	New(54,PL_savestack,96,ANY);
477	PL_savestack_ix = 0;
478	PL_savestack_max = 96;
479
480	New(54,PL_retstack,8,OP*);
481	PL_retstack_ix = 0;
482	PL_retstack_max = 8;
483	}
484
485	/*
486	* destroy the stacks, the callchain etc...
487	* still there is a memleak of 128 bytes...
488	*/
489	STATIC void
490	destroy_stacks(pTHX)
491	{
492	/* is this ugly, I ask? */
493	while (PL_scopestack_ix)
494	LEAVE;
495
496	/* sure it is, but more important: is it correct?? :/ */
497	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
498	FREETMPS;
499
500	while (PL_curstackinfo->si_next)
501	PL_curstackinfo = PL_curstackinfo->si_next;
502
503	while (PL_curstackinfo)
504	{
505	PERL_SI *p = PL_curstackinfo->si_prev;
506
507	{
508	dSP;
509	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
510	PUTBACK; /* possibly superfluous */
511	}
512
513	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
514	dounwind(-1);
515
516	SvREFCNT_dec(PL_curstackinfo->si_stack);
517	Safefree(PL_curstackinfo->si_cxstack);
518	Safefree(PL_curstackinfo);
519	PL_curstackinfo = p;
520	}
521
522	Safefree(PL_tmps_stack);
523	Safefree(PL_markstack);
524	Safefree(PL_scopestack);
525	Safefree(PL_savestack);
526	Safefree(PL_retstack);
527	}
528
529	static void
530	allocate_stack (Coro__State ctx, int alloc)
531	{
532	coro_stack *stack;
533
534	New (0, stack, 1, coro_stack);
535
536	stack->refcnt = 1;
537	stack->usecnt = 1;
538	stack->gencnt = ctx->gencnt = 0;
539	if (alloc)
540	{
541	#ifdef HAVE_MMAP
542	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
543	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
544	if (stack->sptr == (void *)-1)
545	#endif
546	{
547	/FIXME//D//* reasonable stack size! */
548	stack->ssize = -4096 * sizeof (long);
549	New (0, stack->sptr, 4096, long);
550	}
551	}
552	else
553	stack->sptr = 0;
554
555	ctx->stack = stack;
556	}
557
558	static void
559	deallocate_stack (Coro__State ctx)
560	{
561	coro_stack *stack = ctx->stack;
562
563	ctx->stack = 0;
564
565	if (stack)
566	{
567	if (!--stack->refcnt)
568	{
569	#ifdef HAVE_MMAP
570	if (stack->ssize > 0 && stack->sptr)
571	munmap (stack->sptr, stack->ssize);
572	else
573	#else
574	Safefree (stack->sptr);
575	#endif
576	Safefree (stack);
577	}
578	else if (ctx->gencnt == stack->gencnt)
579	--stack->usecnt;
580	}
581	}
582
583	static void
584	setup_coro (void *arg)
585	{
586	/*
587	* emulate part of the perl startup here.
588	*/
589	dSP;
590	Coro__State ctx = (Coro__State)arg;
591	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
592
593	coro_init_stacks (aTHX);
594	/PL_curcop = 0;/
595	/PL_in_eval = PL_in_eval;/ /* inherit */
596	SvREFCNT_dec (GvAV (PL_defgv));
597	GvAV (PL_defgv) = ctx->args;
598
599	SPAGAIN;
600
601	if (ctx->stack)
602	{
603	ctx->cursp = 0;
604
605	PUSHMARK(SP);
606	PUTBACK;
607	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
608
609	if (SvTRUE (ERRSV))
610	croak (NULL);
611	else
612	croak ("FATAL: CCTXT coroutine returned!");
613	}
614	else
615	{
616	UNOP myop;
617
618	PL_op = (OP *)&myop;
619
620	Zero(&myop, 1, UNOP);
621	myop.op_next = Nullop;
622	myop.op_flags = OPf_WANT_VOID;
623
624	PUSHMARK(SP);
625	XPUSHs (sub_init);
626	/*
627	* the next line is slightly wrong, as PL_op->op_next
628	* is actually being executed so we skip the first op.
629	* that doesn't matter, though, since it is only
630	* pp_nextstate and we never return...
631	* ah yes, and I don't care anyways ;)
632	*/
633	PUTBACK;
634	PL_op = pp_entersub();
635	SPAGAIN;
636
637	ENTER; /* necessary e.g. for dounwind */
638	}
639	}
640
641	static void
642	continue_coro (void *arg)
643	{
644	/*
645	* this is a _very_ stripped down perl interpreter ;)
646	*/
647	Coro__State ctx = (Coro__State)arg;
648
649	/FIXME//* must set up top_env here */
650	ctx->cursp = 0;
651	PL_op = PL_op->op_next;
652	CALLRUNOPS(aTHX);
653
654	abort ();
655	}
656
657	STATIC void
658	transfer(pTHX_ struct coro prev, struct coro next, int flags)
659	{
660	dSTACKLEVEL;
661	static struct coro *xnext;
662
663	if (prev != next)
664	{
665	xnext = next;
666
667	if (next->mainstack)
668	{
669	SAVE (prev, flags);
670	LOAD (next);
671
672	/* mark this state as in-use */
673	next->mainstack = 0;
674	next->tmps_ix = -2;
675
676	/* stacklevel changed? if yes, grab the stack for us! */
677	if (flags & TRANSFER_SAVE_CCTXT)
678	{
679	if (!prev->stack)
680	allocate_stack (prev, 0);
681	else if (prev->cursp != stacklevel
682	&& prev->stack->usecnt > 1)
683	{
684	prev->gencnt = ++prev->stack->gencnt;
685	prev->stack->usecnt = 1;
686	}
687
688	/* has our stack been invalidated? */
689	if (next->stack && next->stack->gencnt != next->gencnt)
690	{
691	deallocate_stack (next);
692	allocate_stack (next, 1);
693	coro_create (&(next->stack->cctx),
694	continue_coro, (void *)next,
695	next->stack->sptr, labs (next->stack->ssize));
696	}
697
698	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
699	/* don't add any code here */
700	}
701
702	}
703	else if (next->tmps_ix == -2)
704	croak ("tried to transfer to running coroutine");
705	else
706	{
707	SAVE (prev, -1); /* first get rid of the old state */
708
709	if (flags & TRANSFER_SAVE_CCTXT)
710	{
711	if (!prev->stack)
712	allocate_stack (prev, 0);
713
714	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
715	{
716	setup_coro (next);
717
718	prev->stack->refcnt++;
719	prev->stack->usecnt++;
720	next->stack = prev->stack;
721	next->gencnt = prev->gencnt;
722	}
723	else
724	{
725	allocate_stack (next, 1);
726	coro_create (&(next->stack->cctx),
727	setup_coro, (void *)next,
728	next->stack->sptr, labs (next->stack->ssize));
729	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
730	/* don't add any code here */
731	}
732	}
733	else
734	setup_coro (next);
735	}
736	}
737
738	/*
739	* xnext is now either prev or next, depending on wether
740	* we switched the c stack or not. that's why i use a global
741	* variable, that should become thread-specific at one point.
742	*/
743	xnext->cursp = stacklevel;
744	}
745
746	static struct coro *
747	sv_to_coro (SV arg, const char funcname, const char *varname)
748	{
749	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
750	{
751	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
752
753	if (!he)
754	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
755
756	arg = HeVAL(he);
757	}
758
759	/* must also be changed inside Coro::Cont::yield */
760	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
761	return (struct coro ) SvIV((SV)SvRV(arg));
762
763	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
764	/NORETURN/
765	}
766
767	static void
768	api_transfer(pTHX_ SV prev, SV next, int flags)
769	{
770	transfer(aTHX_
771	sv_to_coro (prev, "Coro::transfer", "prev"),
772	sv_to_coro (next, "Coro::transfer", "next"),
773	flags);
774	}
775		244
776	/ Coro ******************************************************************/	245	/ Coro ******************************************************************/
777		246
778	#define PRIO_MAX 3	247	#define PRIO_MAX 3
779	#define PRIO_HIGH 1	248	#define PRIO_HIGH 1
781	#define PRIO_LOW -1	250	#define PRIO_LOW -1
782	#define PRIO_IDLE -3	251	#define PRIO_IDLE -3
783	#define PRIO_MIN -4	252	#define PRIO_MIN -4
784		253
785	/* for Coro.pm */	254	/* for Coro.pm */
786	static GV coro_current, coro_idle;	255	static SV *coro_current;
787	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	256	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
788	static int coro_nready;	257	static int coro_nready;
		258	static struct coro *coro_first;
789		259
790	static void	260	/ lowlevel stuff ********************************************************/
791	coro_enq (SV *sv)	261
		262	static SV *
		263	coro_get_sv (const char *name, int create)
792	{	264	{
793	if (SvROK (sv))	265	#if PERL_VERSION_ATLEAST (5,9,0)
		266	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		267	get_sv (name, create);
		268	#endif
		269	return get_sv (name, create);
		270	}
		271
		272	static SV *
		273	coro_get_av (const char *name, int create)
		274	{
		275	#if PERL_VERSION_ATLEAST (5,9,0)
		276	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		277	get_av (name, create);
		278	#endif
		279	return get_av (name, create);
		280	}
		281
		282	static AV *
		283	coro_clone_padlist (pTHX_ CV *cv)
		284	{
		285	AV *padlist = CvPADLIST (cv);
		286	AV newpadlist, newpad;
		287
		288	newpadlist = newAV ();
		289	AvREAL_off (newpadlist);
		290	#if PERL_VERSION_ATLEAST (5,9,0)
		291	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		292	#else
		293	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		294	#endif
		295	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		296	--AvFILLp (padlist);
		297
		298	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		299	av_store (newpadlist, 1, (SV *)newpad);
		300
		301	return newpadlist;
		302	}
		303
		304	static void
		305	free_padlist (pTHX_ AV *padlist)
		306	{
		307	/* may be during global destruction */
		308	if (SvREFCNT (padlist))
794	{	309	{
795	SV *hv = SvRV (sv);	310	I32 i = AvFILLp (padlist);
796	if (SvTYPE (hv) == SVt_PVHV)	311	while (i >= 0)
797	{	312	{
798	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);	313	SV **svp = av_fetch (padlist, i--, FALSE);
799	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;	314	if (svp)
		315	{
		316	SV *sv;
		317	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		318	SvREFCNT_dec (sv);
800		319
801	prio = prio > PRIO_MAX ? PRIO_MAX	320	SvREFCNT_dec (*svp);
802	: prio < PRIO_MIN ? PRIO_MIN	321	}
803	: prio;
804
805	av_push (coro_ready [prio - PRIO_MIN], sv);
806	coro_nready++;
807
808	return;
809	}	322	}
		323
		324	SvREFCNT_dec ((SV*)padlist);
		325	}
		326	}
		327
		328	static int
		329	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		330	{
		331	AV *padlist;
		332	AV av = (AV )mg->mg_obj;
		333
		334	/* casting is fun. */
		335	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		336	free_padlist (aTHX_ padlist);
		337
		338	SvREFCNT_dec (av);
		339
		340	return 0;
		341	}
		342
		343	#define PERL_MAGIC_coro PERL_MAGIC_ext
		344
		345	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		346
		347	#define CORO_MAGIC(cv) \
		348	SvMAGIC (cv) \
		349	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		350	? SvMAGIC (cv) \
		351	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		352	: 0
		353
		354	static struct coro *
		355	SvSTATE_ (pTHX_ SV *coro)
		356	{
		357	HV *stash;
		358	MAGIC *mg;
		359
		360	if (SvROK (coro))
		361	coro = SvRV (coro);
		362
		363	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		364	croak ("Coro::State object required");
		365
		366	stash = SvSTASH (coro);
		367	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		368	{
		369	/* very slow, but rare, check */
		370	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		371	croak ("Coro::State object required");
		372	}
		373
		374	mg = CORO_MAGIC (coro);
		375	return (struct coro *)mg->mg_ptr;
		376	}
		377
		378	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		379
		380	/* the next two functions merely cache the padlists */
		381	static void
		382	get_padlist (pTHX_ CV *cv)
		383	{
		384	MAGIC *mg = CORO_MAGIC (cv);
		385	AV *av;
		386
		387	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
		388	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		389	else
		390	{
		391	#if CORO_PREFER_PERL_FUNCTIONS
		392	/* this is probably cleaner, but also slower? */
		393	CV *cp = Perl_cv_clone (cv);
		394	CvPADLIST (cv) = CvPADLIST (cp);
		395	CvPADLIST (cp) = 0;
		396	SvREFCNT_dec (cp);
		397	#else
		398	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		399	#endif
810	}	400	}
		401	}
811		402
812	croak ("Coro::ready tried to enqueue something that is not a coroutine");	403	static void
		404	put_padlist (pTHX_ CV *cv)
		405	{
		406	MAGIC *mg = CORO_MAGIC (cv);
		407	AV *av;
		408
		409	if (expect_false (!mg))
		410	{
		411	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		412	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		413	mg->mg_virtual = &vtbl_coro;
		414	mg->mg_obj = (SV *)newAV ();
		415	}
		416
		417	av = (AV *)mg->mg_obj;
		418
		419	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		420	av_extend (av, AvMAX (av) + 1);
		421
		422	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		423	}
		424
		425	/ load & save, init *****************************************************/
		426
		427	static void
		428	load_perl (pTHX_ Coro__State c)
		429	{
		430	perl_slots *slot = c->slot;
		431	c->slot = 0;
		432
		433	PL_mainstack = c->mainstack;
		434
		435	GvSV (PL_defgv) = slot->defsv;
		436	GvAV (PL_defgv) = slot->defav;
		437	GvSV (PL_errgv) = slot->errsv;
		438	GvSV (irsgv) = slot->irsgv;
		439
		440	#define VAR(name,type) PL_ ## name = slot->name;
		441	# include "state.h"
		442	#undef VAR
		443
		444	{
		445	dSP;
		446
		447	CV *cv;
		448
		449	/* now do the ugly restore mess */
		450	while (expect_true (cv = (CV *)POPs))
		451	{
		452	put_padlist (aTHX_ cv); /* mark this padlist as available */
		453	CvDEPTH (cv) = PTR2IV (POPs);
		454	CvPADLIST (cv) = (AV *)POPs;
		455	}
		456
		457	PUTBACK;
		458	}
		459	}
		460
		461	static void
		462	save_perl (pTHX_ Coro__State c)
		463	{
		464	{
		465	dSP;
		466	I32 cxix = cxstack_ix;
		467	PERL_CONTEXT *ccstk = cxstack;
		468	PERL_SI *top_si = PL_curstackinfo;
		469
		470	/*
		471	* the worst thing you can imagine happens first - we have to save
		472	* (and reinitialize) all cv's in the whole callchain :(
		473	*/
		474
		475	XPUSHs (Nullsv);
		476	/* this loop was inspired by pp_caller */
		477	for (;;)
		478	{
		479	while (expect_true (cxix >= 0))
		480	{
		481	PERL_CONTEXT *cx = &ccstk[cxix--];
		482
		483	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
		484	{
		485	CV *cv = cx->blk_sub.cv;
		486
		487	if (expect_true (CvDEPTH (cv)))
		488	{
		489	EXTEND (SP, 3);
		490	PUSHs ((SV *)CvPADLIST (cv));
		491	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
		492	PUSHs ((SV *)cv);
		493
		494	CvDEPTH (cv) = 0;
		495	get_padlist (aTHX_ cv);
		496	}
		497	}
		498	}
		499
		500	if (expect_true (top_si->si_type == PERLSI_MAIN))
		501	break;
		502
		503	top_si = top_si->si_prev;
		504	ccstk = top_si->si_cxstack;
		505	cxix = top_si->si_cxix;
		506	}
		507
		508	PUTBACK;
		509	}
		510
		511	/* allocate some space on the context stack for our purposes */
		512	{
		513	/* we manually unroll here, as usually 2 slots is enough */
		514	int i;
		515	if (SLOT_COUNT >= 1) CXINC;
		516	if (SLOT_COUNT >= 2) CXINC;
		517	if (SLOT_COUNT >= 3) CXINC;
		518	for (i = 3; i < SLOT_COUNT; ++i)
		519	CXINC;
		520
		521	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		522	}
		523
		524	c->mainstack = PL_mainstack;
		525
		526	{
		527	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		528
		529	slot->defav = GvAV (PL_defgv);
		530	slot->defsv = DEFSV;
		531	slot->errsv = ERRSV;
		532	slot->irsgv = GvSV (irsgv);
		533
		534	#define VAR(name,type) slot->name = PL_ ## name;
		535	# include "state.h"
		536	#undef VAR
		537	}
		538	}
		539
		540	/*
		541	* allocate various perl stacks. This is an exact copy
		542	* of perl.c:init_stacks, except that it uses less memory
		543	* on the (sometimes correct) assumption that coroutines do
		544	* not usually need a lot of stackspace.
		545	*/
		546	#if CORO_PREFER_PERL_FUNCTIONS
		547	# define coro_init_stacks init_stacks
		548	#else
		549	static void
		550	coro_init_stacks (pTHX)
		551	{
		552	PL_curstackinfo = new_stackinfo(32, 8);
		553	PL_curstackinfo->si_type = PERLSI_MAIN;
		554	PL_curstack = PL_curstackinfo->si_stack;
		555	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		556
		557	PL_stack_base = AvARRAY(PL_curstack);
		558	PL_stack_sp = PL_stack_base;
		559	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		560
		561	New(50,PL_tmps_stack,32,SV*);
		562	PL_tmps_floor = -1;
		563	PL_tmps_ix = -1;
		564	PL_tmps_max = 32;
		565
		566	New(54,PL_markstack,16,I32);
		567	PL_markstack_ptr = PL_markstack;
		568	PL_markstack_max = PL_markstack + 16;
		569
		570	#ifdef SET_MARK_OFFSET
		571	SET_MARK_OFFSET;
		572	#endif
		573
		574	New(54,PL_scopestack,8,I32);
		575	PL_scopestack_ix = 0;
		576	PL_scopestack_max = 8;
		577
		578	New(54,PL_savestack,24,ANY);
		579	PL_savestack_ix = 0;
		580	PL_savestack_max = 24;
		581
		582	#if !PERL_VERSION_ATLEAST (5,9,0)
		583	New(54,PL_retstack,4,OP*);
		584	PL_retstack_ix = 0;
		585	PL_retstack_max = 4;
		586	#endif
		587	}
		588	#endif
		589
		590	/*
		591	* destroy the stacks, the callchain etc...
		592	*/
		593	static void
		594	coro_destroy_stacks (pTHX)
		595	{
		596	while (PL_curstackinfo->si_next)
		597	PL_curstackinfo = PL_curstackinfo->si_next;
		598
		599	while (PL_curstackinfo)
		600	{
		601	PERL_SI *p = PL_curstackinfo->si_prev;
		602
		603	if (!IN_DESTRUCT)
		604	SvREFCNT_dec (PL_curstackinfo->si_stack);
		605
		606	Safefree (PL_curstackinfo->si_cxstack);
		607	Safefree (PL_curstackinfo);
		608	PL_curstackinfo = p;
		609	}
		610
		611	Safefree (PL_tmps_stack);
		612	Safefree (PL_markstack);
		613	Safefree (PL_scopestack);
		614	Safefree (PL_savestack);
		615	#if !PERL_VERSION_ATLEAST (5,9,0)
		616	Safefree (PL_retstack);
		617	#endif
		618	}
		619
		620	static size_t
		621	coro_rss (pTHX_ struct coro *coro)
		622	{
		623	size_t rss = sizeof (*coro);
		624
		625	if (coro->mainstack)
		626	{
		627	perl_slots tmp_slot;
		628	perl_slots *slot;
		629
		630	if (coro->flags & CF_RUNNING)
		631	{
		632	slot = &tmp_slot;
		633
		634	#define VAR(name,type) slot->name = PL_ ## name;
		635	# include "state.h"
		636	#undef VAR
		637	}
		638	else
		639	slot = coro->slot;
		640
		641	rss += sizeof (slot->curstackinfo);
		642	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		643	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		644	rss += slot->tmps_max * sizeof (SV *);
		645	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		646	rss += slot->scopestack_max * sizeof (I32);
		647	rss += slot->savestack_max * sizeof (ANY);
		648
		649	#if !PERL_VERSION_ATLEAST (5,9,0)
		650	rss += slot->retstack_max * sizeof (OP *);
		651	#endif
		652	}
		653
		654	return rss;
		655	}
		656
		657	/ coroutine stack handling **********************************************/
		658
		659	static void
		660	coro_setup (pTHX_ struct coro *coro)
		661	{
		662	/*
		663	* emulate part of the perl startup here.
		664	*/
		665	coro_init_stacks (aTHX);
		666
		667	PL_runops = RUNOPS_DEFAULT;
		668	PL_curcop = &PL_compiling;
		669	PL_in_eval = EVAL_NULL;
		670	PL_comppad = 0;
		671	PL_curpm = 0;
		672	PL_curpad = 0;
		673	PL_localizing = 0;
		674	PL_dirty = 0;
		675	PL_restartop = 0;
		676	PL_diehook = SvREFCNT_inc (sv_diehook);
		677	PL_warnhook = SvREFCNT_inc (sv_warnhook);
		678
		679	GvSV (PL_defgv) = newSV (0);
		680	GvAV (PL_defgv) = coro->args; coro->args = 0;
		681	GvSV (PL_errgv) = newSV (0);
		682	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		683	PL_rs = newSVsv (GvSV (irsgv));
		684	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		685
		686	{
		687	dSP;
		688	LOGOP myop;
		689
		690	Zero (&myop, 1, LOGOP);
		691	myop.op_next = Nullop;
		692	myop.op_flags = OPf_WANT_VOID;
		693
		694	PUSHMARK (SP);
		695	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		696	PUTBACK;
		697	PL_op = (OP *)&myop;
		698	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		699	SPAGAIN;
		700	}
		701
		702	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		703	}
		704
		705	static void
		706	coro_destroy (pTHX_ struct coro *coro)
		707	{
		708	if (!IN_DESTRUCT)
		709	{
		710	/* restore all saved variables and stuff */
		711	LEAVE_SCOPE (0);
		712	assert (PL_tmps_floor == -1);
		713
		714	/* free all temporaries */
		715	FREETMPS;
		716	assert (PL_tmps_ix == -1);
		717
		718	/* unwind all extra stacks */
		719	POPSTACK_TO (PL_mainstack);
		720
		721	/* unwind main stack */
		722	dounwind (-1);
		723	}
		724
		725	SvREFCNT_dec (GvSV (PL_defgv));
		726	SvREFCNT_dec (GvAV (PL_defgv));
		727	SvREFCNT_dec (GvSV (PL_errgv));
		728	SvREFCNT_dec (PL_defoutgv);
		729	SvREFCNT_dec (PL_rs);
		730	SvREFCNT_dec (GvSV (irsgv));
		731
		732	SvREFCNT_dec (PL_diehook);
		733	SvREFCNT_dec (PL_warnhook);
		734
		735	SvREFCNT_dec (coro->saved_deffh);
		736	SvREFCNT_dec (coro->throw);
		737
		738	coro_destroy_stacks (aTHX);
		739	}
		740
		741	static void
		742	free_coro_mortal (pTHX)
		743	{
		744	if (expect_true (coro_mortal))
		745	{
		746	SvREFCNT_dec (coro_mortal);
		747	coro_mortal = 0;
		748	}
		749	}
		750
		751	static int
		752	runops_trace (pTHX)
		753	{
		754	COP *oldcop = 0;
		755	int oldcxix = -2;
		756	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		757	coro_cctx *cctx = coro->cctx;
		758
		759	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		760	{
		761	PERL_ASYNC_CHECK ();
		762
		763	if (cctx->flags & CC_TRACE_ALL)
		764	{
		765	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		766	{
		767	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		768	SV bot, top;
		769	AV av = newAV (); / return values */
		770	SV **cb;
		771	dSP;
		772
		773	GV *gv = CvGV (cx->blk_sub.cv);
		774	SV *fullname = sv_2mortal (newSV (0));
		775	if (isGV (gv))
		776	gv_efullname3 (fullname, gv, 0);
		777
		778	bot = PL_stack_base + cx->blk_oldsp + 1;
		779	top = cx->blk_gimme == G_ARRAY ? SP + 1
		780	: cx->blk_gimme == G_SCALAR ? bot + 1
		781	: bot;
		782
		783	av_extend (av, top - bot);
		784	while (bot < top)
		785	av_push (av, SvREFCNT_inc (*bot++));
		786
		787	PL_runops = RUNOPS_DEFAULT;
		788	ENTER;
		789	SAVETMPS;
		790	EXTEND (SP, 3);
		791	PUSHMARK (SP);
		792	PUSHs (&PL_sv_no);
		793	PUSHs (fullname);
		794	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		795	PUTBACK;
		796	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		797	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		798	SPAGAIN;
		799	FREETMPS;
		800	LEAVE;
		801	PL_runops = runops_trace;
		802	}
		803
		804	if (oldcop != PL_curcop)
		805	{
		806	oldcop = PL_curcop;
		807
		808	if (PL_curcop != &PL_compiling)
		809	{
		810	SV **cb;
		811
		812	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		813	{
		814	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		815
		816	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		817	{
		818	runops_proc_t old_runops = PL_runops;
		819	dSP;
		820	GV *gv = CvGV (cx->blk_sub.cv);
		821	SV *fullname = sv_2mortal (newSV (0));
		822
		823	if (isGV (gv))
		824	gv_efullname3 (fullname, gv, 0);
		825
		826	PL_runops = RUNOPS_DEFAULT;
		827	ENTER;
		828	SAVETMPS;
		829	EXTEND (SP, 3);
		830	PUSHMARK (SP);
		831	PUSHs (&PL_sv_yes);
		832	PUSHs (fullname);
		833	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		834	PUTBACK;
		835	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		836	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		837	SPAGAIN;
		838	FREETMPS;
		839	LEAVE;
		840	PL_runops = runops_trace;
		841	}
		842
		843	oldcxix = cxstack_ix;
		844	}
		845
		846	if (cctx->flags & CC_TRACE_LINE)
		847	{
		848	dSP;
		849
		850	PL_runops = RUNOPS_DEFAULT;
		851	ENTER;
		852	SAVETMPS;
		853	EXTEND (SP, 3);
		854	PL_runops = RUNOPS_DEFAULT;
		855	PUSHMARK (SP);
		856	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		857	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		858	PUTBACK;
		859	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		860	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		861	SPAGAIN;
		862	FREETMPS;
		863	LEAVE;
		864	PL_runops = runops_trace;
		865	}
		866	}
		867	}
		868	}
		869	}
		870
		871	TAINT_NOT;
		872	return 0;
		873	}
		874
		875	/* inject a fake call to Coro::State::_cctx_init into the execution */
		876	/* _cctx_init should be careful, as it could be called at almost any time */
		877	/* during execution of a perl program */
		878	static void NOINLINE
		879	prepare_cctx (pTHX_ coro_cctx *cctx)
		880	{
		881	dSP;
		882	LOGOP myop;
		883
		884	PL_top_env = &PL_start_env;
		885
		886	if (cctx->flags & CC_TRACE)
		887	PL_runops = runops_trace;
		888
		889	Zero (&myop, 1, LOGOP);
		890	myop.op_next = PL_op;
		891	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		892
		893	PUSHMARK (SP);
		894	EXTEND (SP, 2);
		895	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		896	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		897	PUTBACK;
		898	PL_op = (OP *)&myop;
		899	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		900	SPAGAIN;
		901	}
		902
		903	/*
		904	* this is a _very_ stripped down perl interpreter ;)
		905	*/
		906	static void
		907	coro_run (void *arg)
		908	{
		909	dTHX;
		910
		911	/* coro_run is the alternative tail of transfer(), so unlock here. */
		912	UNLOCK;
		913
		914	/* we now skip the entersub that lead to transfer() */
		915	PL_op = PL_op->op_next;
		916
		917	/* inject a fake subroutine call to cctx_init */
		918	prepare_cctx (aTHX_ (coro_cctx *)arg);
		919
		920	/* somebody or something will hit me for both perl_run and PL_restartop */
		921	PL_restartop = PL_op;
		922	perl_run (PL_curinterp);
		923
		924	/*
		925	* If perl-run returns we assume exit() was being called or the coro
		926	* fell off the end, which seems to be the only valid (non-bug)
		927	* reason for perl_run to return. We try to exit by jumping to the
		928	* bootstrap-time "top" top_env, as we cannot restore the "main"
		929	* coroutine as Coro has no such concept
		930	*/
		931	PL_top_env = main_top_env;
		932	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		933	}
		934
		935	static coro_cctx *
		936	cctx_new ()
		937	{
		938	coro_cctx *cctx;
		939	void *stack_start;
		940	size_t stack_size;
		941
		942	++cctx_count;
		943
		944	Newz (0, cctx, 1, coro_cctx);
		945
		946	#if HAVE_MMAP
		947
		948	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		949	/* mmap supposedly does allocate-on-write for us */
		950	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		951
		952	if (cctx->sptr != (void *)-1)
		953	{
		954	# if CORO_STACKGUARD
		955	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		956	# endif
		957	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		958	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		959	cctx->flags \|= CC_MAPPED;
		960	}
		961	else
		962	#endif
		963	{
		964	cctx->ssize = coro_stacksize * (long)sizeof (long);
		965	New (0, cctx->sptr, coro_stacksize, long);
		966
		967	if (!cctx->sptr)
		968	{
		969	perror ("FATAL: unable to allocate stack for coroutine");
		970	_exit (EXIT_FAILURE);
		971	}
		972
		973	stack_start = cctx->sptr;
		974	stack_size = cctx->ssize;
		975	}
		976
		977	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		978	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		979
		980	return cctx;
		981	}
		982
		983	static void
		984	cctx_destroy (coro_cctx *cctx)
		985	{
		986	if (!cctx)
		987	return;
		988
		989	--cctx_count;
		990
		991	#if CORO_USE_VALGRIND
		992	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		993	#endif
		994
		995	#if HAVE_MMAP
		996	if (cctx->flags & CC_MAPPED)
		997	munmap (cctx->sptr, cctx->ssize);
		998	else
		999	#endif
		1000	Safefree (cctx->sptr);
		1001
		1002	Safefree (cctx);
		1003	}
		1004
		1005	/* wether this cctx should be destructed */
		1006	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1007
		1008	static coro_cctx *
		1009	cctx_get (pTHX)
		1010	{
		1011	while (expect_true (cctx_first))
		1012	{
		1013	coro_cctx *cctx = cctx_first;
		1014	cctx_first = cctx->next;
		1015	--cctx_idle;
		1016
		1017	if (expect_true (!CCTX_EXPIRED (cctx)))
		1018	return cctx;
		1019
		1020	cctx_destroy (cctx);
		1021	}
		1022
		1023	return cctx_new ();
		1024	}
		1025
		1026	static void
		1027	cctx_put (coro_cctx *cctx)
		1028	{
		1029	/* free another cctx if overlimit */
		1030	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1031	{
		1032	coro_cctx *first = cctx_first;
		1033	cctx_first = first->next;
		1034	--cctx_idle;
		1035
		1036	cctx_destroy (first);
		1037	}
		1038
		1039	++cctx_idle;
		1040	cctx->next = cctx_first;
		1041	cctx_first = cctx;
		1042	}
		1043
		1044	/ coroutine switching ***************************************************/
		1045
		1046	static void
		1047	transfer_check (pTHX_ struct coro prev, struct coro next)
		1048	{
		1049	if (expect_true (prev != next))
		1050	{
		1051	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1052	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1053
		1054	if (expect_false (next->flags & CF_RUNNING))
		1055	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1056
		1057	if (expect_false (next->flags & CF_DESTROYED))
		1058	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1059
		1060	if (
		1061	#if PERL_VERSION_ATLEAST (5,9,0)
		1062	expect_false (PL_parser)
		1063	#else
		1064	expect_false (PL_lex_state != LEX_NOTPARSING)
		1065	#endif
		1066	)
		1067	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1068	}
		1069	}
		1070
		1071	/* always use the TRANSFER macro */
		1072	static void NOINLINE
		1073	transfer (pTHX_ struct coro prev, struct coro next)
		1074	{
		1075	dSTACKLEVEL;
		1076
		1077	/* sometimes transfer is only called to set idle_sp */
		1078	if (expect_false (!next))
		1079	{
		1080	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1081	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1082	}
		1083	else if (expect_true (prev != next))
		1084	{
		1085	coro_cctx *prev__cctx;
		1086
		1087	if (expect_false (prev->flags & CF_NEW))
		1088	{
		1089	/* create a new empty context */
		1090	Newz (0, prev->cctx, 1, coro_cctx);
		1091	prev->flags &= ~CF_NEW;
		1092	prev->flags \|= CF_RUNNING;
		1093	}
		1094
		1095	prev->flags &= ~CF_RUNNING;
		1096	next->flags \|= CF_RUNNING;
		1097
		1098	LOCK;
		1099
		1100	if (expect_false (next->flags & CF_NEW))
		1101	{
		1102	/* need to start coroutine */
		1103	next->flags &= ~CF_NEW;
		1104	/* first get rid of the old state */
		1105	save_perl (aTHX_ prev);
		1106	/* setup coroutine call */
		1107	coro_setup (aTHX_ next);
		1108	}
		1109	else
		1110	{
		1111	/* coroutine already started */
		1112	save_perl (aTHX_ prev);
		1113	load_perl (aTHX_ next);
		1114	}
		1115
		1116	prev__cctx = prev->cctx;
		1117
		1118	/* possibly "free" the cctx */
		1119	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1120	{
		1121	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1122	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1123
		1124	prev->cctx = 0;
		1125
		1126	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1127	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1128	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1129	next->cctx = cctx_get (aTHX);
		1130
		1131	cctx_put (prev__cctx);
		1132	}
		1133
		1134	++next->usecount;
		1135
		1136	if (expect_true (!next->cctx))
		1137	next->cctx = cctx_get (aTHX);
		1138
		1139	if (expect_false (prev__cctx != next->cctx))
		1140	{
		1141	prev__cctx->top_env = PL_top_env;
		1142	PL_top_env = next->cctx->top_env;
		1143	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1144	}
		1145
		1146	free_coro_mortal (aTHX);
		1147	UNLOCK;
		1148
		1149	if (expect_false (prev->throw \|\| next->throw))
		1150	{
		1151	struct coro *coro = SvSTATE (coro_current);
		1152
		1153	if (coro->throw)
		1154	{
		1155	SV *exception = coro->throw;
		1156	coro->throw = 0;
		1157	sv_setsv (ERRSV, exception);
		1158	croak (0);
		1159	}
		1160	}
		1161	}
		1162	}
		1163
		1164	struct transfer_args
		1165	{
		1166	struct coro prev, next;
		1167	};
		1168
		1169	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1170	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1171
		1172	/ high level stuff ******************************************************/
		1173
		1174	static int
		1175	coro_state_destroy (pTHX_ struct coro *coro)
		1176	{
		1177	if (coro->flags & CF_DESTROYED)
		1178	return 0;
		1179
		1180	coro->flags \|= CF_DESTROYED;
		1181
		1182	if (coro->flags & CF_READY)
		1183	{
		1184	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1185	/* alternative: look through all ready queues and remove the coro */
		1186	LOCK;
		1187	--coro_nready;
		1188	UNLOCK;
		1189	}
		1190	else
		1191	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1192
		1193	if (coro->mainstack && coro->mainstack != main_mainstack)
		1194	{
		1195	struct coro temp;
		1196
		1197	if (coro->flags & CF_RUNNING)
		1198	croak ("FATAL: tried to destroy currently running coroutine");
		1199
		1200	save_perl (aTHX_ &temp);
		1201	load_perl (aTHX_ coro);
		1202
		1203	coro_destroy (aTHX_ coro);
		1204
		1205	load_perl (aTHX_ &temp);
		1206
		1207	coro->slot = 0;
		1208	}
		1209
		1210	cctx_destroy (coro->cctx);
		1211	SvREFCNT_dec (coro->args);
		1212
		1213	if (coro->next) coro->next->prev = coro->prev;
		1214	if (coro->prev) coro->prev->next = coro->next;
		1215	if (coro == coro_first) coro_first = coro->next;
		1216
		1217	return 1;
		1218	}
		1219
		1220	static int
		1221	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1222	{
		1223	struct coro coro = (struct coro )mg->mg_ptr;
		1224	mg->mg_ptr = 0;
		1225
		1226	coro->hv = 0;
		1227
		1228	if (--coro->refcnt < 0)
		1229	{
		1230	coro_state_destroy (aTHX_ coro);
		1231	Safefree (coro);
		1232	}
		1233
		1234	return 0;
		1235	}
		1236
		1237	static int
		1238	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1239	{
		1240	struct coro coro = (struct coro )mg->mg_ptr;
		1241
		1242	++coro->refcnt;
		1243
		1244	return 0;
		1245	}
		1246
		1247	static MGVTBL coro_state_vtbl = {
		1248	0, 0, 0, 0,
		1249	coro_state_free,
		1250	0,
		1251	#ifdef MGf_DUP
		1252	coro_state_dup,
		1253	#else
		1254	# define MGf_DUP 0
		1255	#endif
		1256	};
		1257
		1258	static void
		1259	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1260	{
		1261	ta->prev = SvSTATE (prev_sv);
		1262	ta->next = SvSTATE (next_sv);
		1263	TRANSFER_CHECK (*ta);
		1264	}
		1265
		1266	static void
		1267	api_transfer (SV prev_sv, SV next_sv)
		1268	{
		1269	dTHX;
		1270	struct transfer_args ta;
		1271
		1272	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1273	TRANSFER (ta);
		1274	}
		1275
		1276	/ Coro ******************************************************************/
		1277
		1278	static void
		1279	coro_enq (pTHX_ SV *coro_sv)
		1280	{
		1281	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
813	}	1282	}
814		1283
815	static SV *	1284	static SV *
816	coro_deq (int min_prio)	1285	coro_deq (pTHX_ int min_prio)
817	{	1286	{
818	int prio = PRIO_MAX - PRIO_MIN;	1287	int prio = PRIO_MAX - PRIO_MIN;
819		1288
820	min_prio -= PRIO_MIN;	1289	min_prio -= PRIO_MIN;
821	if (min_prio < 0)	1290	if (min_prio < 0)
822	min_prio = 0;	1291	min_prio = 0;
823		1292
824	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1293	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
825	if (av_len (coro_ready[prio]) >= 0)	1294	if (AvFILLp (coro_ready [prio]) >= 0)
826	{
827	coro_nready--;
828	return av_shift (coro_ready[prio]);	1295	return av_shift (coro_ready [prio]);
829	}
830		1296
831	return 0;	1297	return 0;
832	}	1298	}
833		1299
834	static void	1300	static int
835	api_ready (SV *coro)	1301	api_ready (SV *coro_sv)
836	{	1302	{
		1303	dTHX;
		1304	struct coro *coro;
		1305
		1306	if (SvROK (coro_sv))
		1307	coro_sv = SvRV (coro_sv);
		1308
		1309	coro = SvSTATE (coro_sv);
		1310
		1311	if (coro->flags & CF_READY)
		1312	return 0;
		1313
		1314	coro->flags \|= CF_READY;
		1315
		1316	LOCK;
837	coro_enq (SvREFCNT_inc (coro));	1317	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
838	}	1318	++coro_nready;
		1319	UNLOCK;
839		1320
		1321	return 1;
		1322	}
		1323
840	static void	1324	static int
841	api_schedule (int cede)	1325	api_is_ready (SV *coro_sv)
842	{	1326	{
		1327	dTHX;
		1328	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1329	}
		1330
		1331	static void
		1332	prepare_schedule (pTHX_ struct transfer_args *ta)
		1333	{
843	SV prev, next;	1334	SV prev_sv, next_sv;
844		1335
		1336	for (;;)
		1337	{
		1338	LOCK;
		1339	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1340
		1341	/* nothing to schedule: call the idle handler */
		1342	if (expect_false (!next_sv))
		1343	{
		1344	dSP;
		1345	UNLOCK;
		1346
		1347	ENTER;
		1348	SAVETMPS;
		1349
		1350	PUSHMARK (SP);
		1351	PUTBACK;
		1352	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1353
		1354	FREETMPS;
		1355	LEAVE;
		1356	continue;
		1357	}
		1358
		1359	ta->next = SvSTATE (next_sv);
		1360
		1361	/* cannot transfer to destroyed coros, skip and look for next */
		1362	if (expect_false (ta->next->flags & CF_DESTROYED))
		1363	{
		1364	UNLOCK;
		1365	SvREFCNT_dec (next_sv);
		1366	/* coro_nready is already taken care of by destroy */
		1367	continue;
		1368	}
		1369
		1370	--coro_nready;
		1371	UNLOCK;
		1372	break;
		1373	}
		1374
		1375	/* free this only after the transfer */
845	prev = GvSV (coro_current);	1376	prev_sv = SvRV (coro_current);
		1377	ta->prev = SvSTATE (prev_sv);
		1378	TRANSFER_CHECK (*ta);
		1379	assert (ta->next->flags & CF_READY);
		1380	ta->next->flags &= ~CF_READY;
		1381	SvRV_set (coro_current, next_sv);
846		1382
847	if (cede)	1383	LOCK;
848	coro_enq (SvREFCNT_inc (prev));	1384	free_coro_mortal (aTHX);
849		1385	coro_mortal = prev_sv;
850	next = coro_deq (PRIO_MIN);	1386	UNLOCK;
851
852	if (!next)
853	next = SvREFCNT_inc (GvSV (coro_idle));
854
855	GvSV (coro_current) = SvREFCNT_inc (next);
856	transfer (aTHX_
857	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
858	sv_to_coro (next, "Coro::schedule", "next coroutine"),
859	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
860	SvREFCNT_dec (next);
861	SvREFCNT_dec (prev);
862	}	1387	}
863		1388
		1389	static void
		1390	prepare_cede (pTHX_ struct transfer_args *ta)
		1391	{
		1392	api_ready (coro_current);
		1393	prepare_schedule (aTHX_ ta);
		1394	}
		1395
		1396	static int
		1397	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1398	{
		1399	if (coro_nready)
		1400	{
		1401	SV *prev = SvRV (coro_current);
		1402	prepare_schedule (aTHX_ ta);
		1403	api_ready (prev);
		1404	return 1;
		1405	}
		1406	else
		1407	return 0;
		1408	}
		1409
		1410	static void
		1411	api_schedule (void)
		1412	{
		1413	dTHX;
		1414	struct transfer_args ta;
		1415
		1416	prepare_schedule (aTHX_ &ta);
		1417	TRANSFER (ta);
		1418	}
		1419
		1420	static int
		1421	api_cede (void)
		1422	{
		1423	dTHX;
		1424	struct transfer_args ta;
		1425
		1426	prepare_cede (aTHX_ &ta);
		1427
		1428	if (expect_true (ta.prev != ta.next))
		1429	{
		1430	TRANSFER (ta);
		1431	return 1;
		1432	}
		1433	else
		1434	return 0;
		1435	}
		1436
		1437	static int
		1438	api_cede_notself (void)
		1439	{
		1440	dTHX;
		1441	struct transfer_args ta;
		1442
		1443	if (prepare_cede_notself (aTHX_ &ta))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
		1450	}
		1451
		1452	static void
		1453	api_trace (SV *coro_sv, int flags)
		1454	{
		1455	dTHX;
		1456	struct coro *coro = SvSTATE (coro_sv);
		1457
		1458	if (flags & CC_TRACE)
		1459	{
		1460	if (!coro->cctx)
		1461	coro->cctx = cctx_new ();
		1462	else if (!(coro->cctx->flags & CC_TRACE))
		1463	croak ("cannot enable tracing on coroutine with custom stack");
		1464
		1465	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1466	}
		1467	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1468	{
		1469	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1470
		1471	if (coro->flags & CF_RUNNING)
		1472	PL_runops = RUNOPS_DEFAULT;
		1473	else
		1474	coro->slot->runops = RUNOPS_DEFAULT;
		1475	}
		1476	}
		1477
864	MODULE = Coro::State PACKAGE = Coro::State	1478	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
865		1479
866	PROTOTYPES: ENABLE	1480	PROTOTYPES: DISABLE
867		1481
868	BOOT:	1482	BOOT:
869	{ /* {} necessary for stoopid perl-5.6.x */	1483	{
870	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1484	#ifdef USE_ITHREADS
871	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1485	MUTEX_INIT (&coro_mutex);
		1486	#endif
		1487	BOOT_PAGESIZE;
		1488
		1489	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1490	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1491
		1492	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1493	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1494
		1495	if (!PL_diehook) PL_diehook = SvREFCNT_inc (sv_diehook);
		1496	if (!PL_warnhook) PL_warnhook = SvREFCNT_inc (sv_warnhook);
		1497
872	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1498	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
873		1499
874	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1500	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
875	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1501	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
876	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1502	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
877	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1503	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
878
879	if (!padlist_cache)
880	padlist_cache = newHV ();
881		1504
882	main_mainstack = PL_mainstack;	1505	main_mainstack = PL_mainstack;
		1506	main_top_env = PL_top_env;
		1507
		1508	while (main_top_env->je_prev)
		1509	main_top_env = main_top_env->je_prev;
883		1510
884	coroapi.ver = CORO_API_VERSION;	1511	coroapi.ver = CORO_API_VERSION;
885	coroapi.transfer = api_transfer;	1512	coroapi.transfer = api_transfer;
886	}
887		1513
888	Coro::State	1514	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
889	_newprocess(args)	1515	}
890	SV * args	1516
891	PROTOTYPE: $	1517	SV *
		1518	new (char *klass, ...)
892	CODE:	1519	CODE:
893	Coro__State coro;	1520	{
		1521	struct coro *coro;
		1522	HV *hv;
		1523	int i;
894		1524
895	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
896	croak ("Coro::State::_newprocess expects an arrayref");
897
898	New (0, coro, 1, struct coro);	1525	Newz (0, coro, 1, struct coro);
		1526	coro->args = newAV ();
		1527	coro->flags = CF_NEW;
899		1528
900	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1529	if (coro_first) coro_first->prev = coro;
901	coro->mainstack = 0; /* actual work is done inside transfer */	1530	coro->next = coro_first;
902	coro->stack = 0;	1531	coro_first = coro;
903		1532
904	RETVAL = coro;	1533	coro->hv = hv = newHV ();
		1534	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1535	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1536
		1537	av_extend (coro->args, items - 1);
		1538	for (i = 1; i < items; i++)
		1539	av_push (coro->args, newSVsv (ST (i)));
		1540	}
905	OUTPUT:	1541	OUTPUT:
906	RETVAL	1542	RETVAL
907		1543
		1544	# these not obviously related functions are all rolled into the same xs
		1545	# function to increase chances that they all will call transfer with the same
		1546	# stack offset
908	void	1547	void
909	transfer(prev, next, flags)	1548	_set_stacklevel (...)
910	Coro::State_or_hashref prev	1549	ALIAS:
911	Coro::State_or_hashref next	1550	Coro::State::transfer = 1
912	int flags	1551	Coro::schedule = 2
913	PROTOTYPE: @	1552	Coro::cede = 3
		1553	Coro::cede_notself = 4
914	CODE:	1554	CODE:
915	PUTBACK;	1555	{
916	transfer (aTHX_ prev, next, flags);	1556	struct transfer_args ta;
917	SPAGAIN;	1557
		1558	switch (ix)
		1559	{
		1560	case 0:
		1561	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1562	ta.next = 0;
		1563	break;
		1564
		1565	case 1:
		1566	if (items != 2)
		1567	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1568
		1569	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1570	break;
		1571
		1572	case 2:
		1573	prepare_schedule (aTHX_ &ta);
		1574	break;
		1575
		1576	case 3:
		1577	prepare_cede (aTHX_ &ta);
		1578	break;
		1579
		1580	case 4:
		1581	if (!prepare_cede_notself (aTHX_ &ta))
		1582	XSRETURN_EMPTY;
		1583
		1584	break;
		1585	}
		1586
		1587	BARRIER;
		1588	TRANSFER (ta);
		1589
		1590	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1591	XSRETURN_YES;
		1592	}
		1593
		1594	bool
		1595	_destroy (SV *coro_sv)
		1596	CODE:
		1597	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1598	OUTPUT:
		1599	RETVAL
918		1600
919	void	1601	void
920	DESTROY(coro)
921	Coro::State coro
922	CODE:
923
924	if (coro->mainstack && coro->mainstack != main_mainstack)
925	{
926	struct coro temp;
927
928	PUTBACK;
929	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
930	LOAD(aTHX_ coro);
931	SPAGAIN;
932
933	destroy_stacks (aTHX);
934
935	LOAD((&temp)); /* this will get rid of defsv etc.. */
936	SPAGAIN;
937
938	coro->mainstack = 0;
939	}
940
941	deallocate_stack (coro);
942
943	Safefree (coro);
944
945	void
946	flush()
947	CODE:
948	#ifdef MAY_FLUSH
949	flush_padlist_cache ();
950	#endif
951
952	void
953	_exit(code)	1602	_exit (code)
954	int code	1603	int code
955	PROTOTYPE: $	1604	PROTOTYPE: $
956	CODE:	1605	CODE:
957	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
958	_exit (code);	1606	_exit (code);
959	#else
960	signal (SIGTERM, SIG_DFL);
961	raise (SIGTERM);
962	exit (code);
963	#endif
964		1607
965	MODULE = Coro::State PACKAGE = Coro::Cont	1608	int
		1609	cctx_stacksize (int new_stacksize = 0)
		1610	CODE:
		1611	RETVAL = coro_stacksize;
		1612	if (new_stacksize)
		1613	coro_stacksize = new_stacksize;
		1614	OUTPUT:
		1615	RETVAL
966		1616
967	# this is slightly dirty (should expose a c-level api)	1617	int
		1618	cctx_count ()
		1619	CODE:
		1620	RETVAL = cctx_count;
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	int
		1625	cctx_idle ()
		1626	CODE:
		1627	RETVAL = cctx_idle;
		1628	OUTPUT:
		1629	RETVAL
968		1630
969	void	1631	void
970	yield(...)	1632	list ()
971	PROTOTYPE: @	1633	PPCODE:
		1634	{
		1635	struct coro *coro;
		1636	for (coro = coro_first; coro; coro = coro->next)
		1637	if (coro->hv)
		1638	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1639	}
		1640
		1641	void
		1642	call (Coro::State coro, SV *coderef)
		1643	ALIAS:
		1644	eval = 1
		1645	CODE:
		1646	{
		1647	if (coro->mainstack)
		1648	{
		1649	struct coro temp;
		1650
		1651	if (!(coro->flags & CF_RUNNING))
		1652	{
		1653	save_perl (aTHX_ &temp);
		1654	load_perl (aTHX_ coro);
		1655	}
		1656
		1657	{
		1658	dSP;
		1659	ENTER;
		1660	SAVETMPS;
		1661	PUSHMARK (SP);
		1662	PUTBACK;
		1663
		1664	if (ix)
		1665	eval_sv (coderef, 0);
		1666	else
		1667	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1668
		1669	SPAGAIN;
		1670	FREETMPS;
		1671	LEAVE;
		1672	PUTBACK;
		1673	}
		1674
		1675	if (!(coro->flags & CF_RUNNING))
		1676	{
		1677	save_perl (aTHX_ coro);
		1678	load_perl (aTHX_ &temp);
		1679	}
		1680	}
		1681	}
		1682
		1683	SV *
		1684	is_ready (Coro::State coro)
		1685	PROTOTYPE: $
		1686	ALIAS:
		1687	is_ready = CF_READY
		1688	is_running = CF_RUNNING
		1689	is_new = CF_NEW
		1690	is_destroyed = CF_DESTROYED
		1691	CODE:
		1692	RETVAL = boolSV (coro->flags & ix);
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	void
		1697	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1698
		1699	SV *
		1700	has_stack (Coro::State coro)
		1701	PROTOTYPE: $
		1702	CODE:
		1703	RETVAL = boolSV (!!coro->cctx);
		1704	OUTPUT:
		1705	RETVAL
		1706
		1707	int
		1708	is_traced (Coro::State coro)
		1709	PROTOTYPE: $
		1710	CODE:
		1711	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1712	OUTPUT:
		1713	RETVAL
		1714
		1715	IV
		1716	rss (Coro::State coro)
		1717	PROTOTYPE: $
		1718	ALIAS:
		1719	usecount = 1
972	CODE:	1720	CODE:
973	static SV *returnstk;	1721	switch (ix)
974	SV *sv;	1722	{
975	AV *defav = GvAV (PL_defgv);	1723	case 0: RETVAL = coro_rss (aTHX_ coro); break;
976	struct coro prev, next;	1724	case 1: RETVAL = coro->usecount; break;
		1725	}
		1726	OUTPUT:
		1727	RETVAL
977		1728
978	if (!returnstk)
979	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
980
981	/* set up @_ -- ugly */
982	av_clear (defav);
983	av_fill (defav, items - 1);
984	while (items--)
985	av_store (defav, items, SvREFCNT_inc (ST(items)));
986
987	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
988	sv = av_pop ((AV *)SvRV (returnstk));
989	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
990	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
991	SvREFCNT_dec (sv);
992
993	transfer(aTHX_ prev, next, 0);
994		1729
995	MODULE = Coro::State PACKAGE = Coro	1730	MODULE = Coro::State PACKAGE = Coro
996		1731
997	# this is slightly dirty (should expose a c-level api)
998
999	BOOT:	1732	BOOT:
1000	{	1733	{
1001	int i;	1734	int i;
		1735
		1736	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1737	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1738	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1739
		1740	coro_current = coro_get_sv ("Coro::current", FALSE);
		1741	SvREADONLY_on (coro_current);
		1742
1002	HV *stash = gv_stashpv ("Coro", TRUE);	1743	coro_stash = gv_stashpv ("Coro", TRUE);
1003		1744
1004	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1745	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1005	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1746	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1006	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1747	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1007	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1748	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1008	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1749	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1009	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1750	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1010
1011	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1012	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1013		1751
1014	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1752	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1015	coro_ready[i] = newAV ();	1753	coro_ready[i] = newAV ();
1016		1754
1017	{	1755	{
1018	SV *sv = perl_get_sv("Coro::API", 1);	1756	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1757	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1019		1758
1020	coroapi.schedule = api_schedule;	1759	coroapi.schedule = api_schedule;
		1760	coroapi.cede = api_cede;
		1761	coroapi.cede_notself = api_cede_notself;
1021	coroapi.ready = api_ready;	1762	coroapi.ready = api_ready;
		1763	coroapi.is_ready = api_is_ready;
1022	coroapi.nready = &coro_nready;	1764	coroapi.nready = &coro_nready;
1023	coroapi.current = coro_current;	1765	coroapi.current = coro_current;
1024		1766
1025	GCoroAPI = &coroapi;	1767	GCoroAPI = &coroapi;
1026	sv_setiv(sv, (IV)&coroapi);	1768	sv_setiv (sv, (IV)&coroapi);
1027	SvREADONLY_on(sv);	1769	SvREADONLY_on (sv);
1028	}	1770	}
1029	}	1771	}
1030		1772
1031	void	1773	void
1032	ready(self)	1774	_set_current (SV *current)
1033	SV * self	1775	PROTOTYPE: $
1034	CODE:	1776	CODE:
1035	api_ready (self);	1777	SvREFCNT_dec (SvRV (coro_current));
		1778	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1036		1779
1037	int	1780	int
		1781	prio (Coro::State coro, int newprio = 0)
		1782	ALIAS:
		1783	nice = 1
		1784	CODE:
		1785	{
		1786	RETVAL = coro->prio;
		1787
		1788	if (items > 1)
		1789	{
		1790	if (ix)
		1791	newprio = coro->prio - newprio;
		1792
		1793	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1794	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1795
		1796	coro->prio = newprio;
		1797	}
		1798	}
		1799	OUTPUT:
		1800	RETVAL
		1801
		1802	SV *
		1803	ready (SV *self)
		1804	PROTOTYPE: $
		1805	CODE:
		1806	RETVAL = boolSV (api_ready (self));
		1807	OUTPUT:
		1808	RETVAL
		1809
		1810	int
1038	nready(...)	1811	nready (...)
1039	PROTOTYPE:	1812	PROTOTYPE:
1040	CODE:	1813	CODE:
1041	RETVAL = coro_nready;	1814	RETVAL = coro_nready;
1042	OUTPUT:	1815	OUTPUT:
1043	RETVAL	1816	RETVAL
1044		1817
1045	void	1818	void
1046	schedule(...)	1819	throw (Coro::State self, SV *throw = &PL_sv_undef)
1047	PROTOTYPE:	1820	PROTOTYPE: $;$
1048	ALIAS:	1821	CODE:
1049	cede = 1	1822	SvREFCNT_dec (self->throw);
		1823	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1824
		1825	# for async_pool speedup
		1826	void
		1827	_pool_1 (SV *cb)
1050	CODE:	1828	CODE:
1051	api_schedule (ix);	1829	{
		1830	struct coro *coro = SvSTATE (coro_current);
		1831	HV hv = (HV )SvRV (coro_current);
		1832	AV *defav = GvAV (PL_defgv);
		1833	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1834	AV *invoke_av;
		1835	int i, len;
1052		1836
		1837	if (!invoke)
		1838	croak ("\3async_pool terminate\2\n");
		1839
		1840	SvREFCNT_dec (coro->saved_deffh);
		1841	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1842
		1843	hv_store (hv, "desc", sizeof ("desc") - 1,
		1844	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1845
		1846	invoke_av = (AV *)SvRV (invoke);
		1847	len = av_len (invoke_av);
		1848
		1849	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1850
		1851	if (len > 0)
		1852	{
		1853	av_fill (defav, len - 1);
		1854	for (i = 0; i < len; ++i)
		1855	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1856	}
		1857
		1858	SvREFCNT_dec (invoke);
		1859	}
		1860
		1861	void
		1862	_pool_2 (SV *cb)
		1863	CODE:
		1864	{
		1865	struct coro *coro = SvSTATE (coro_current);
		1866
		1867	sv_setsv (cb, &PL_sv_undef);
		1868
		1869	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1870	coro->saved_deffh = 0;
		1871
		1872	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1873	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1874	croak ("\3async_pool terminate\2\n");
		1875
		1876	av_clear (GvAV (PL_defgv));
		1877	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1878	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1879
		1880	coro->prio = 0;
		1881
		1882	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1883	api_trace (coro_current, 0);
		1884
		1885	av_push (av_async_pool, newSVsv (coro_current));
		1886	}
		1887
		1888
		1889	MODULE = Coro::State PACKAGE = Coro::AIO
		1890
		1891	SV *
		1892	_get_state ()
		1893	CODE:
		1894	{
		1895	struct io_state *data;
		1896
		1897	RETVAL = newSV (sizeof (struct io_state));
		1898	data = (struct io_state *)SvPVX (RETVAL);
		1899	SvCUR_set (RETVAL, sizeof (struct io_state));
		1900	SvPOK_only (RETVAL);
		1901
		1902	data->errorno = errno;
		1903	data->laststype = PL_laststype;
		1904	data->laststatval = PL_laststatval;
		1905	data->statcache = PL_statcache;
		1906	}
		1907	OUTPUT:
		1908	RETVAL
		1909
		1910	void
		1911	_set_state (char *data_)
		1912	PROTOTYPE: $
		1913	CODE:
		1914	{
		1915	struct io_state data = (void )data_;
		1916
		1917	errno = data->errorno;
		1918	PL_laststype = data->laststype;
		1919	PL_laststatval = data->laststatval;
		1920	PL_statcache = data->statcache;
		1921	}
		1922

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Comparing Coro/Coro/State.xs (file contents): Revision 1.30 by root, Sat Aug 25 22:19:05 2001 UTC vs. Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.30 by root, Sat Aug 25 22:19:05 2001 UTC vs.
Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC