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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.29 by root, Sat Aug 25 21:40:34 2001 UTC vs.
Revision 1.211 by root, Wed Oct 10 03:37:58 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>
		15	#include <inttypes.h> /* portable stdint.h */
8		16
9	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
10	# include <unistd.h>	18	# include <unistd.h>
11	# include <sys/mman.h>	19	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
15	# else	23	# else
16	# undef HAVE_MMAP	24	# undef HAVE_MMAP
17	# endif	25	# endif
18	# 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
19	#endif	34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
20		39
21	#define MAY_FLUSH /* increases codesize and is rarely used */	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
22		46
23	#define SUB_INIT "Coro::State::initialize"	47	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	48	#define MAX_IDLE_CCTX 8
25		49
26	/* The next macro should declare a variable stacklevel that contains and approximation	50	#define PERL_VERSION_ATLEAST(a,b,c) \
27	* to the current C stack pointer. Its property is that it changes with each call	51	(PERL_REVISION > (a) \
28	* and should be unique. */	52	\|\| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
		57	# ifndef PL_ppaddr
		58	# define PL_ppaddr ppaddr
		59	# endif
		60	# ifndef call_sv
		61	# define call_sv perl_call_sv
		62	# endif
		63	# ifndef get_sv
		64	# define get_sv perl_get_sv
		65	# endif
		66	# ifndef get_cv
		67	# define get_cv perl_get_cv
		68	# endif
		69	# ifndef IS_PADGV
		70	# define IS_PADGV(v) 0
		71	# endif
		72	# ifndef IS_PADCONST
		73	# define IS_PADCONST(v) 0
		74	# endif
		75	#endif
		76
		77	/* 5.8.7 */
		78	#ifndef SvRV_set
		79	# define SvRV_set(s,v) SvRV(s) = (v)
		80	#endif
		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
		89
		90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		91	# undef CORO_STACKGUARD
		92	#endif
		93
		94	#ifndef CORO_STACKGUARD
		95	# define CORO_STACKGUARD 0
		96	#endif
		97
		98	/* prefer perl internal functions over our own? */
		99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
		102
		103	/* The next macros try to return the current stack pointer, in an as
		104	* portable way as possible. */
		105	#define dSTACKLEVEL volatile char stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	106	#define STACKLEVEL ((void *)&stacklevel)
30		107
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		109
		110	#if __GNUC__ >= 3
		111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
		114	#else
		115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
		118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
		122
		123	#define NOINLINE attribute ((noinline))
32		124
33	#include "CoroAPI.h"	125	#include "CoroAPI.h"
34		126
		127	#ifdef USE_ITHREADS
		128	static perl_mutex coro_mutex;
		129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		131	#else
		132	# define LOCK (void)0
		133	# define UNLOCK (void)0
		134	#endif
		135
		136	#define strpair(const) const, sizeof (const) - 1
		137
		138	/* helper storage struct for Coro::AIO */
		139	struct io_state
		140	{
		141	int errorno;
		142	I32 laststype;
		143	int laststatval;
		144	Stat_t statcache;
		145	};
		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
35	static struct CoroAPI coroapi;	148	static struct CoroAPI coroapi;
		149	static AV main_mainstack; / used to differentiate between $main and others */
		150	static JMPENV *main_top_env;
		151	static HV coro_state_stash, coro_stash;
		152	static SV coro_mortal; / will be freed after next transfer */
36		153
37	/* this is actually not only the c stack but also c registers etc... */	154	static GV irsgv; / $/ */
		155	static GV stdoutgv; / STDOUT /
		156
		157	static HV hv_sig; / %SIG */
		158	static SV *sv_diehook;
		159	static SV *sv_warnhook;
		160
		161	/* async_pool helper stuff */
		162	static SV *sv_pool_rss;
		163	static SV *sv_pool_size;
		164	static AV *av_async_pool;
		165
		166	static struct coro_cctx *cctx_first;
		167	static int cctx_count, cctx_idle;
		168
		169	enum {
		170	CC_MAPPED = 0x01,
		171	CC_NOREUSE = 0x02, /* throw this away after tracing */
		172	CC_TRACE = 0x04,
		173	CC_TRACE_SUB = 0x08, /* trace sub calls */
		174	CC_TRACE_LINE = 0x10, /* trace each statement */
		175	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		176	};
		177
		178	/* this is a structure representing a c-level coroutine */
		179	typedef struct coro_cctx {
		180	struct coro_cctx *next;
		181
		182	/* the stack */
		183	void *sptr;
		184	size_t ssize;
		185
		186	/* cpu state */
		187	void idle_sp; / sp of top-level transfer/schedule/cede call */
		188	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		189	JMPENV *top_env;
		190	coro_context cctx;
		191
		192	#if CORO_USE_VALGRIND
		193	int valgrind_id;
		194	#endif
		195	unsigned char flags;
		196	} coro_cctx;
		197
		198	enum {
		199	CF_RUNNING = 0x0001, /* coroutine is running */
		200	CF_READY = 0x0002, /* coroutine is ready */
		201	CF_NEW = 0x0004, /* has never been switched to */
		202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		203	};
		204
		205	/* the structure where most of the perl state is stored, overlaid on the cxstack */
38	typedef struct {	206	typedef struct {
39	int refcnt; /* pointer reference counter */	207	SV *defsv;
40	int usecnt; /* shared by how many coroutines */	208	AV *defav;
41	int gencnt; /* generation counter */	209	SV *errsv;
		210	SV *irsgv;
		211	#define VAR(name,type) type name;
		212	# include "state.h"
		213	#undef VAR
		214	} perl_slots;
42		215
43	coro_context cctx;	216	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
44		217
45	void *sptr;	218	/* this is a structure representing a perl-level coroutine */
46	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48
49	struct coro {	219	struct coro {
50	/* the optional C context */	220	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	221	coro_cctx *cctx;
52	void *cursp;
53	int gencnt;
54		222
55	/* optionally saved, might be zero */	223	/* 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;	224	AV *mainstack;
68	SV **stack_sp;	225	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		226
92	/* data associated with this coroutine (initial args) */	227	AV args; / data associated with this coroutine (initial args) */
93	AV *args;	228	int refcnt; /* coroutines are refcounted, yes */
		229	int flags; /* CF_ flags */
		230	HV hv; / the perl hash associated with this coro, if any */
		231
		232	/* statistics */
		233	int usecount; /* number of transfers to this coro */
		234
		235	/* coro process data */
		236	int prio;
		237	SV throw; / exception to be thrown */
		238
		239	/* async_pool */
		240	SV *saved_deffh;
		241
		242	/* linked list */
		243	struct coro next, prev;
94	};	244	};
95		245
96	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	247	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	do
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	while (cxix >= 0);
397
398	if (top_si->si_type == PERLSI_MAIN)
399	break;
400
401	top_si = top_si->si_prev;
402	ccstk = top_si->si_cxstack;
403	cxix = top_si->si_cxix;
404	}
405
406	PUTBACK;
407	}
408
409	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413	c->dowarn = PL_dowarn;
414	c->in_eval = PL_in_eval;
415
416	c->curstackinfo = PL_curstackinfo;
417	c->curstack = PL_curstack;
418	c->mainstack = PL_mainstack;
419	c->stack_sp = PL_stack_sp;
420	c->op = PL_op;
421	c->curpad = PL_curpad;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	c->retstack = PL_retstack;
438	c->retstack_ix = PL_retstack_ix;
439	c->retstack_max = PL_retstack_max;
440	c->curcop = PL_curcop;
441	c->top_env = PL_top_env;
442	}
443
444	/*
445	* allocate various perl stacks. This is an exact copy
446	* of perl.c:init_stacks, except that it uses less memory
447	* on the assumption that coroutines do not usually need
448	* a lot of stackspace.
449	*/
450	STATIC void
451	coro_init_stacks (pTHX)
452	{
453	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
454	PL_curstackinfo->si_type = PERLSI_MAIN;
455	PL_curstack = PL_curstackinfo->si_stack;
456	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
457
458	PL_stack_base = AvARRAY(PL_curstack);
459	PL_stack_sp = PL_stack_base;
460	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
461
462	New(50,PL_tmps_stack,96,SV*);
463	PL_tmps_floor = -1;
464	PL_tmps_ix = -1;
465	PL_tmps_max = 96;
466
467	New(54,PL_markstack,16,I32);
468	PL_markstack_ptr = PL_markstack;
469	PL_markstack_max = PL_markstack + 16;
470
471	SET_MARK_OFFSET;
472
473	New(54,PL_scopestack,16,I32);
474	PL_scopestack_ix = 0;
475	PL_scopestack_max = 16;
476
477	New(54,PL_savestack,96,ANY);
478	PL_savestack_ix = 0;
479	PL_savestack_max = 96;
480
481	New(54,PL_retstack,8,OP*);
482	PL_retstack_ix = 0;
483	PL_retstack_max = 8;
484	}
485
486	/*
487	* destroy the stacks, the callchain etc...
488	* still there is a memleak of 128 bytes...
489	*/
490	STATIC void
491	destroy_stacks(pTHX)
492	{
493	/* is this ugly, I ask? */
494	while (PL_scopestack_ix)
495	LEAVE;
496
497	/* sure it is, but more important: is it correct?? :/ */
498	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
499	FREETMPS;
500
501	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;
503
504	while (PL_curstackinfo)
505	{
506	PERL_SI *p = PL_curstackinfo->si_prev;
507
508	{
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
515	dounwind(-1);
516
517	SvREFCNT_dec(PL_curstackinfo->si_stack);
518	Safefree(PL_curstackinfo->si_cxstack);
519	Safefree(PL_curstackinfo);
520	PL_curstackinfo = p;
521	}
522
523	Safefree(PL_tmps_stack);
524	Safefree(PL_markstack);
525	Safefree(PL_scopestack);
526	Safefree(PL_savestack);
527	Safefree(PL_retstack);
528	}
529
530	static void
531	allocate_stack (Coro__State ctx, int alloc)
532	{
533	coro_stack *stack;
534
535	New (0, stack, 1, coro_stack);
536
537	stack->refcnt = 1;
538	stack->usecnt = 1;
539	stack->gencnt = ctx->gencnt = 0;
540	if (alloc)
541	{
542	#ifdef HAVE_MMAP
543	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
544	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
545	if (stack->sptr == (void *)-1)
546	#endif
547	{
548	/FIXME//D//* reasonable stack size! */
549	stack->ssize = -4096 * sizeof (long);
550	New (0, stack->sptr, 4096, long);
551	}
552	}
553	else
554	stack->sptr = 0;
555
556	ctx->stack = stack;
557	}
558
559	static void
560	deallocate_stack (Coro__State ctx)
561	{
562	coro_stack *stack = ctx->stack;
563
564	ctx->stack = 0;
565
566	if (stack)
567	{
568	if (!--stack->refcnt)
569	{
570	#ifdef HAVE_MMAP
571	if (stack->ssize > 0 && stack->sptr)
572	munmap (stack->sptr, stack->ssize);
573	else
574	#else
575	Safefree (stack->sptr);
576	#endif
577	Safefree (stack);
578	}
579	else if (ctx->gencnt == stack->gencnt)
580	--stack->usecnt;
581	}
582	}
583
584	static void
585	setup_coro (void *arg)
586	{
587	/*
588	* emulate part of the perl startup here.
589	*/
590	dSP;
591	Coro__State ctx = (Coro__State)arg;
592	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
593
594	coro_init_stacks (aTHX);
595	/PL_curcop = 0;/
596	/PL_in_eval = PL_in_eval;/ /* inherit */
597	SvREFCNT_dec (GvAV (PL_defgv));
598	GvAV (PL_defgv) = ctx->args;
599
600	SPAGAIN;
601
602	if (ctx->stack)
603	{
604	ctx->cursp = 0;
605
606	PUSHMARK(SP);
607	PUTBACK;
608	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
609
610	if (SvTRUE (ERRSV))
611	croak (NULL);
612	else
613	croak ("FATAL: CCTXT coroutine returned!");
614	}
615	else
616	{
617	UNOP myop;
618
619	PL_op = (OP *)&myop;
620
621	Zero(&myop, 1, UNOP);
622	myop.op_next = Nullop;
623	myop.op_flags = OPf_WANT_VOID;
624
625	PUSHMARK(SP);
626	XPUSHs (sub_init);
627	/*
628	* the next line is slightly wrong, as PL_op->op_next
629	* is actually being executed so we skip the first op.
630	* that doesn't matter, though, since it is only
631	* pp_nextstate and we never return...
632	* ah yes, and I don't care anyways ;)
633	*/
634	PUTBACK;
635	PL_op = pp_entersub();
636	SPAGAIN;
637
638	ENTER; /* necessary e.g. for dounwind */
639	}
640	}
641
642	static void
643	continue_coro (void *arg)
644	{
645	/*
646	* this is a _very_ stripped down perl interpreter ;)
647	*/
648	Coro__State ctx = (Coro__State)arg;
649
650	/FIXME//* must set up top_env here */
651	ctx->cursp = 0;
652	PL_op = PL_op->op_next;
653	CALLRUNOPS(aTHX);
654
655	abort ();
656	}
657
658	STATIC void
659	transfer(pTHX_ struct coro prev, struct coro next, int flags)
660	{
661	dSTACKLEVEL;
662	static struct coro *xnext;
663
664	if (prev != next)
665	{
666	xnext = next;
667
668	if (next->mainstack)
669	{
670	SAVE (prev, flags);
671	LOAD (next);
672
673	/* mark this state as in-use */
674	next->mainstack = 0;
675	next->tmps_ix = -2;
676
677	/* stacklevel changed? if yes, grab the stack for us! */
678	if (flags & TRANSFER_SAVE_CCTXT)
679	{
680	if (!prev->stack)
681	allocate_stack (prev, 0);
682	else if (prev->cursp != stacklevel
683	&& prev->stack->usecnt > 1)
684	{
685	prev->gencnt = ++prev->stack->gencnt;
686	prev->stack->usecnt = 1;
687	}
688
689	/* has our stack been invalidated? */
690	if (next->stack && next->stack->gencnt != next->gencnt)
691	{
692	deallocate_stack (next);
693	allocate_stack (next, 1);
694	coro_create (&(next->stack->cctx),
695	continue_coro, (void *)next,
696	next->stack->sptr, labs (next->stack->ssize));
697	}
698
699	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
700	/* don't add any code here */
701	}
702
703	}
704	else if (next->tmps_ix == -2)
705	croak ("tried to transfer to running coroutine");
706	else
707	{
708	SAVE (prev, -1); /* first get rid of the old state */
709
710	if (flags & TRANSFER_SAVE_CCTXT)
711	{
712	if (!prev->stack)
713	allocate_stack (prev, 0);
714
715	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716	{
717	setup_coro (next);
718
719	prev->stack->refcnt++;
720	prev->stack->usecnt++;
721	next->stack = prev->stack;
722	next->gencnt = prev->gencnt;
723	}
724	else
725	{
726	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),
728	setup_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));
730	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731	/* don't add any code here */
732	}
733	}
734	else
735	setup_coro (next);
736	}
737	}
738
739	/*
740	* xnext is now either prev or next, depending on wether
741	* we switched the c stack or not. that's why i use a global
742	* variable, that should become thread-specific at one point.
743	*/
744	xnext->cursp = stacklevel;
745	}
746
747	static struct coro *
748	sv_to_coro (SV arg, const char funcname, const char *varname)
749	{
750	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
751	{
752	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
753
754	if (!he)
755	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
756
757	arg = HeVAL(he);
758	}
759
760	/* must also be changed inside Coro::Cont::yield */
761	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
762	return (struct coro ) SvIV((SV)SvRV(arg));
763
764	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
765	/NORETURN/
766	}
767
768	static void
769	api_transfer(pTHX_ SV prev, SV next, int flags)
770	{
771	transfer(aTHX_
772	sv_to_coro (prev, "Coro::transfer", "prev"),
773	sv_to_coro (next, "Coro::transfer", "next"),
774	flags);
775	}
776		248
777	/ Coro ******************************************************************/	249	/ Coro ******************************************************************/
778		250
779	#define PRIO_MAX 3	251	#define PRIO_MAX 3
780	#define PRIO_HIGH 1	252	#define PRIO_HIGH 1
782	#define PRIO_LOW -1	254	#define PRIO_LOW -1
783	#define PRIO_IDLE -3	255	#define PRIO_IDLE -3
784	#define PRIO_MIN -4	256	#define PRIO_MIN -4
785		257
786	/* for Coro.pm */	258	/* for Coro.pm */
787	static GV coro_current, coro_idle;	259	static SV *coro_current;
788	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
789	static int coro_nready;	261	static int coro_nready;
		262	static struct coro *coro_first;
790		263
791	static void	264	/ lowlevel stuff ********************************************************/
792	coro_enq (SV *sv)	265
		266	static SV *
		267	coro_get_sv (const char *name, int create)
793	{	268	{
794	if (SvROK (sv))	269	#if PERL_VERSION_ATLEAST (5,9,0)
		270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		271	get_sv (name, create);
		272	#endif
		273	return get_sv (name, create);
		274	}
		275
		276	static AV *
		277	coro_get_av (const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,9,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_av (name, create);
		282	#endif
		283	return get_av (name, create);
		284	}
		285
		286	static HV *
		287	coro_get_hv (const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,9,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_hv (name, create);
		292	#endif
		293	return get_hv (name, create);
		294	}
		295
		296	static AV *
		297	coro_clone_padlist (pTHX_ CV *cv)
		298	{
		299	AV *padlist = CvPADLIST (cv);
		300	AV newpadlist, newpad;
		301
		302	newpadlist = newAV ();
		303	AvREAL_off (newpadlist);
		304	#if PERL_VERSION_ATLEAST (5,9,0)
		305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		306	#else
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		308	#endif
		309	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		310	--AvFILLp (padlist);
		311
		312	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		313	av_store (newpadlist, 1, (SV *)newpad);
		314
		315	return newpadlist;
		316	}
		317
		318	static void
		319	free_padlist (pTHX_ AV *padlist)
		320	{
		321	/* may be during global destruction */
		322	if (SvREFCNT (padlist))
795	{	323	{
796	SV *hv = SvRV (sv);	324	I32 i = AvFILLp (padlist);
797	if (SvTYPE (hv) == SVt_PVHV)	325	while (i >= 0)
798	{	326	{
799	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);	327	SV **svp = av_fetch (padlist, i--, FALSE);
800	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;	328	if (svp)
		329	{
		330	SV *sv;
		331	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		332	SvREFCNT_dec (sv);
801		333
802	prio = prio > PRIO_MAX ? PRIO_MAX	334	SvREFCNT_dec (*svp);
803	: prio < PRIO_MIN ? PRIO_MIN	335	}
804	: prio;
805
806	av_push (coro_ready [prio - PRIO_MIN], sv);
807	coro_nready++;
808
809	return;
810	}	336	}
		337
		338	SvREFCNT_dec ((SV*)padlist);
		339	}
		340	}
		341
		342	static int
		343	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		344	{
		345	AV *padlist;
		346	AV av = (AV )mg->mg_obj;
		347
		348	/* casting is fun. */
		349	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		350	free_padlist (aTHX_ padlist);
		351
		352	SvREFCNT_dec (av);
		353
		354	return 0;
		355	}
		356
		357	#define PERL_MAGIC_coro PERL_MAGIC_ext
		358
		359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		360
		361	#define CORO_MAGIC(cv) \
		362	SvMAGIC (cv) \
		363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		364	? SvMAGIC (cv) \
		365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		366	: 0
		367
		368	static struct coro *
		369	SvSTATE_ (pTHX_ SV *coro)
		370	{
		371	HV *stash;
		372	MAGIC *mg;
		373
		374	if (SvROK (coro))
		375	coro = SvRV (coro);
		376
		377	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		378	croak ("Coro::State object required");
		379
		380	stash = SvSTASH (coro);
		381	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		382	{
		383	/* very slow, but rare, check */
		384	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		385	croak ("Coro::State object required");
		386	}
		387
		388	mg = CORO_MAGIC (coro);
		389	return (struct coro *)mg->mg_ptr;
		390	}
		391
		392	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		393
		394	/* the next two functions merely cache the padlists */
		395	static void
		396	get_padlist (pTHX_ CV *cv)
		397	{
		398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
		400
		401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
		402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		403	else
		404	{
		405	#if CORO_PREFER_PERL_FUNCTIONS
		406	/* this is probably cleaner, but also slower? */
		407	CV *cp = Perl_cv_clone (cv);
		408	CvPADLIST (cv) = CvPADLIST (cp);
		409	CvPADLIST (cp) = 0;
		410	SvREFCNT_dec (cp);
		411	#else
		412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		413	#endif
811	}	414	}
		415	}
812		416
813	croak ("Coro::ready tried to enqueue something that is not a coroutine");	417	static void
		418	put_padlist (pTHX_ CV *cv)
		419	{
		420	MAGIC *mg = CORO_MAGIC (cv);
		421	AV *av;
		422
		423	if (expect_false (!mg))
		424	{
		425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		427	mg->mg_virtual = &vtbl_coro;
		428	mg->mg_obj = (SV *)newAV ();
		429	}
		430
		431	av = (AV *)mg->mg_obj;
		432
		433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		434	av_extend (av, AvMAX (av) + 1);
		435
		436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		437	}
		438
		439	/ load & save, init *****************************************************/
		440
		441	static void
		442	load_perl (pTHX_ Coro__State c)
		443	{
		444	perl_slots *slot = c->slot;
		445	c->slot = 0;
		446
		447	PL_mainstack = c->mainstack;
		448
		449	GvSV (PL_defgv) = slot->defsv;
		450	GvAV (PL_defgv) = slot->defav;
		451	GvSV (PL_errgv) = slot->errsv;
		452	GvSV (irsgv) = slot->irsgv;
		453
		454	#define VAR(name,type) PL_ ## name = slot->name;
		455	# include "state.h"
		456	#undef VAR
		457
		458	/hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);/
		459	/hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);/
		460
		461	{
		462	dSP;
		463
		464	CV *cv;
		465
		466	/* now do the ugly restore mess */
		467	while (expect_true (cv = (CV *)POPs))
		468	{
		469	put_padlist (aTHX_ cv); /* mark this padlist as available */
		470	CvDEPTH (cv) = PTR2IV (POPs);
		471	CvPADLIST (cv) = (AV *)POPs;
		472	}
		473
		474	PUTBACK;
		475	}
		476	}
		477
		478	static void
		479	save_perl (pTHX_ Coro__State c)
		480	{
		481	{
		482	dSP;
		483	I32 cxix = cxstack_ix;
		484	PERL_CONTEXT *ccstk = cxstack;
		485	PERL_SI *top_si = PL_curstackinfo;
		486
		487	/*
		488	* the worst thing you can imagine happens first - we have to save
		489	* (and reinitialize) all cv's in the whole callchain :(
		490	*/
		491
		492	XPUSHs (Nullsv);
		493	/* this loop was inspired by pp_caller */
		494	for (;;)
		495	{
		496	while (expect_true (cxix >= 0))
		497	{
		498	PERL_CONTEXT *cx = &ccstk[cxix--];
		499
		500	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
		501	{
		502	CV *cv = cx->blk_sub.cv;
		503
		504	if (expect_true (CvDEPTH (cv)))
		505	{
		506	EXTEND (SP, 3);
		507	PUSHs ((SV *)CvPADLIST (cv));
		508	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
		509	PUSHs ((SV *)cv);
		510
		511	CvDEPTH (cv) = 0;
		512	get_padlist (aTHX_ cv);
		513	}
		514	}
		515	}
		516
		517	if (expect_true (top_si->si_type == PERLSI_MAIN))
		518	break;
		519
		520	top_si = top_si->si_prev;
		521	ccstk = top_si->si_cxstack;
		522	cxix = top_si->si_cxix;
		523	}
		524
		525	PUTBACK;
		526	}
		527
		528	/* allocate some space on the context stack for our purposes */
		529	/* we manually unroll here, as usually 2 slots is enough */
		530	if (SLOT_COUNT >= 1) CXINC;
		531	if (SLOT_COUNT >= 2) CXINC;
		532	if (SLOT_COUNT >= 3) CXINC;
		533	{
		534	int i;
		535	for (i = 3; i < SLOT_COUNT; ++i)
		536	CXINC;
		537	}
		538	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		539
		540	c->mainstack = PL_mainstack;
		541
		542	{
		543	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		544
		545	slot->defav = GvAV (PL_defgv);
		546	slot->defsv = DEFSV;
		547	slot->errsv = ERRSV;
		548	slot->irsgv = GvSV (irsgv);
		549
		550	#define VAR(name,type) slot->name = PL_ ## name;
		551	# include "state.h"
		552	#undef VAR
		553	}
		554	}
		555
		556	/*
		557	* allocate various perl stacks. This is an exact copy
		558	* of perl.c:init_stacks, except that it uses less memory
		559	* on the (sometimes correct) assumption that coroutines do
		560	* not usually need a lot of stackspace.
		561	*/
		562	#if CORO_PREFER_PERL_FUNCTIONS
		563	# define coro_init_stacks init_stacks
		564	#else
		565	static void
		566	coro_init_stacks (pTHX)
		567	{
		568	PL_curstackinfo = new_stackinfo(32, 8);
		569	PL_curstackinfo->si_type = PERLSI_MAIN;
		570	PL_curstack = PL_curstackinfo->si_stack;
		571	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		572
		573	PL_stack_base = AvARRAY(PL_curstack);
		574	PL_stack_sp = PL_stack_base;
		575	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		576
		577	New(50,PL_tmps_stack,32,SV*);
		578	PL_tmps_floor = -1;
		579	PL_tmps_ix = -1;
		580	PL_tmps_max = 32;
		581
		582	New(54,PL_markstack,16,I32);
		583	PL_markstack_ptr = PL_markstack;
		584	PL_markstack_max = PL_markstack + 16;
		585
		586	#ifdef SET_MARK_OFFSET
		587	SET_MARK_OFFSET;
		588	#endif
		589
		590	New(54,PL_scopestack,8,I32);
		591	PL_scopestack_ix = 0;
		592	PL_scopestack_max = 8;
		593
		594	New(54,PL_savestack,24,ANY);
		595	PL_savestack_ix = 0;
		596	PL_savestack_max = 24;
		597
		598	#if !PERL_VERSION_ATLEAST (5,9,0)
		599	New(54,PL_retstack,4,OP*);
		600	PL_retstack_ix = 0;
		601	PL_retstack_max = 4;
		602	#endif
		603	}
		604	#endif
		605
		606	/*
		607	* destroy the stacks, the callchain etc...
		608	*/
		609	static void
		610	coro_destroy_stacks (pTHX)
		611	{
		612	while (PL_curstackinfo->si_next)
		613	PL_curstackinfo = PL_curstackinfo->si_next;
		614
		615	while (PL_curstackinfo)
		616	{
		617	PERL_SI *p = PL_curstackinfo->si_prev;
		618
		619	if (!IN_DESTRUCT)
		620	SvREFCNT_dec (PL_curstackinfo->si_stack);
		621
		622	Safefree (PL_curstackinfo->si_cxstack);
		623	Safefree (PL_curstackinfo);
		624	PL_curstackinfo = p;
		625	}
		626
		627	Safefree (PL_tmps_stack);
		628	Safefree (PL_markstack);
		629	Safefree (PL_scopestack);
		630	Safefree (PL_savestack);
		631	#if !PERL_VERSION_ATLEAST (5,9,0)
		632	Safefree (PL_retstack);
		633	#endif
		634	}
		635
		636	static size_t
		637	coro_rss (pTHX_ struct coro *coro)
		638	{
		639	size_t rss = sizeof (*coro);
		640
		641	if (coro->mainstack)
		642	{
		643	perl_slots tmp_slot;
		644	perl_slots *slot;
		645
		646	if (coro->flags & CF_RUNNING)
		647	{
		648	slot = &tmp_slot;
		649
		650	#define VAR(name,type) slot->name = PL_ ## name;
		651	# include "state.h"
		652	#undef VAR
		653	}
		654	else
		655	slot = coro->slot;
		656
		657	rss += sizeof (slot->curstackinfo);
		658	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		659	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		660	rss += slot->tmps_max * sizeof (SV *);
		661	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		662	rss += slot->scopestack_max * sizeof (I32);
		663	rss += slot->savestack_max * sizeof (ANY);
		664
		665	#if !PERL_VERSION_ATLEAST (5,9,0)
		666	rss += slot->retstack_max * sizeof (OP *);
		667	#endif
		668	}
		669
		670	return rss;
		671	}
		672
		673	/ coroutine stack handling **********************************************/
		674
		675	static void
		676	coro_setup (pTHX_ struct coro *coro)
		677	{
		678	/*
		679	* emulate part of the perl startup here.
		680	*/
		681	coro_init_stacks (aTHX);
		682
		683	PL_runops = RUNOPS_DEFAULT;
		684	PL_curcop = &PL_compiling;
		685	PL_in_eval = EVAL_NULL;
		686	PL_comppad = 0;
		687	PL_curpm = 0;
		688	PL_curpad = 0;
		689	PL_localizing = 0;
		690	PL_dirty = 0;
		691	PL_restartop = 0;
		692	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		693	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		694
		695	GvSV (PL_defgv) = newSV (0);
		696	GvAV (PL_defgv) = coro->args; coro->args = 0;
		697	GvSV (PL_errgv) = newSV (0);
		698	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		699	PL_rs = newSVsv (GvSV (irsgv));
		700	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		701
		702	{
		703	dSP;
		704	LOGOP myop;
		705
		706	Zero (&myop, 1, LOGOP);
		707	myop.op_next = Nullop;
		708	myop.op_flags = OPf_WANT_VOID;
		709
		710	PUSHMARK (SP);
		711	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		712	PUTBACK;
		713	PL_op = (OP *)&myop;
		714	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		715	SPAGAIN;
		716	}
		717
		718	/* this newly created coroutine might be run on an existing cctx which most
		719	* likely was suspended in set_stacklevel, called from entersub.
		720	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		721	* so we ENTER here for symmetry
		722	*/
		723	ENTER;
		724	}
		725
		726	static void
		727	coro_destroy (pTHX_ struct coro *coro)
		728	{
		729	if (!IN_DESTRUCT)
		730	{
		731	/* restore all saved variables and stuff */
		732	LEAVE_SCOPE (0);
		733	assert (PL_tmps_floor == -1);
		734
		735	/* free all temporaries */
		736	FREETMPS;
		737	assert (PL_tmps_ix == -1);
		738
		739	/* unwind all extra stacks */
		740	POPSTACK_TO (PL_mainstack);
		741
		742	/* unwind main stack */
		743	dounwind (-1);
		744	}
		745
		746	SvREFCNT_dec (GvSV (PL_defgv));
		747	SvREFCNT_dec (GvAV (PL_defgv));
		748	SvREFCNT_dec (GvSV (PL_errgv));
		749	SvREFCNT_dec (PL_defoutgv);
		750	SvREFCNT_dec (PL_rs);
		751	SvREFCNT_dec (GvSV (irsgv));
		752
		753	SvREFCNT_dec (PL_diehook);
		754	SvREFCNT_dec (PL_warnhook);
		755
		756	SvREFCNT_dec (coro->saved_deffh);
		757	SvREFCNT_dec (coro->throw);
		758
		759	coro_destroy_stacks (aTHX);
		760	}
		761
		762	static void
		763	free_coro_mortal (pTHX)
		764	{
		765	if (expect_true (coro_mortal))
		766	{
		767	SvREFCNT_dec (coro_mortal);
		768	coro_mortal = 0;
		769	}
		770	}
		771
		772	static int
		773	runops_trace (pTHX)
		774	{
		775	COP *oldcop = 0;
		776	int oldcxix = -2;
		777	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		778	coro_cctx *cctx = coro->cctx;
		779
		780	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		781	{
		782	PERL_ASYNC_CHECK ();
		783
		784	if (cctx->flags & CC_TRACE_ALL)
		785	{
		786	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		787	{
		788	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		789	SV bot, top;
		790	AV av = newAV (); / return values */
		791	SV **cb;
		792	dSP;
		793
		794	GV *gv = CvGV (cx->blk_sub.cv);
		795	SV *fullname = sv_2mortal (newSV (0));
		796	if (isGV (gv))
		797	gv_efullname3 (fullname, gv, 0);
		798
		799	bot = PL_stack_base + cx->blk_oldsp + 1;
		800	top = cx->blk_gimme == G_ARRAY ? SP + 1
		801	: cx->blk_gimme == G_SCALAR ? bot + 1
		802	: bot;
		803
		804	av_extend (av, top - bot);
		805	while (bot < top)
		806	av_push (av, SvREFCNT_inc (*bot++));
		807
		808	PL_runops = RUNOPS_DEFAULT;
		809	ENTER;
		810	SAVETMPS;
		811	EXTEND (SP, 3);
		812	PUSHMARK (SP);
		813	PUSHs (&PL_sv_no);
		814	PUSHs (fullname);
		815	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		816	PUTBACK;
		817	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		818	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		819	SPAGAIN;
		820	FREETMPS;
		821	LEAVE;
		822	PL_runops = runops_trace;
		823	}
		824
		825	if (oldcop != PL_curcop)
		826	{
		827	oldcop = PL_curcop;
		828
		829	if (PL_curcop != &PL_compiling)
		830	{
		831	SV **cb;
		832
		833	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		834	{
		835	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		836
		837	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		838	{
		839	runops_proc_t old_runops = PL_runops;
		840	dSP;
		841	GV *gv = CvGV (cx->blk_sub.cv);
		842	SV *fullname = sv_2mortal (newSV (0));
		843
		844	if (isGV (gv))
		845	gv_efullname3 (fullname, gv, 0);
		846
		847	PL_runops = RUNOPS_DEFAULT;
		848	ENTER;
		849	SAVETMPS;
		850	EXTEND (SP, 3);
		851	PUSHMARK (SP);
		852	PUSHs (&PL_sv_yes);
		853	PUSHs (fullname);
		854	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		855	PUTBACK;
		856	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		857	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		858	SPAGAIN;
		859	FREETMPS;
		860	LEAVE;
		861	PL_runops = runops_trace;
		862	}
		863
		864	oldcxix = cxstack_ix;
		865	}
		866
		867	if (cctx->flags & CC_TRACE_LINE)
		868	{
		869	dSP;
		870
		871	PL_runops = RUNOPS_DEFAULT;
		872	ENTER;
		873	SAVETMPS;
		874	EXTEND (SP, 3);
		875	PL_runops = RUNOPS_DEFAULT;
		876	PUSHMARK (SP);
		877	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		878	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		879	PUTBACK;
		880	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		881	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		882	SPAGAIN;
		883	FREETMPS;
		884	LEAVE;
		885	PL_runops = runops_trace;
		886	}
		887	}
		888	}
		889	}
		890	}
		891
		892	TAINT_NOT;
		893	return 0;
		894	}
		895
		896	/* inject a fake call to Coro::State::_cctx_init into the execution */
		897	/* _cctx_init should be careful, as it could be called at almost any time */
		898	/* during execution of a perl program */
		899	static void NOINLINE
		900	cctx_prepare (pTHX_ coro_cctx *cctx)
		901	{
		902	dSP;
		903	LOGOP myop;
		904
		905	PL_top_env = &PL_start_env;
		906
		907	if (cctx->flags & CC_TRACE)
		908	PL_runops = runops_trace;
		909
		910	Zero (&myop, 1, LOGOP);
		911	myop.op_next = PL_op;
		912	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		913
		914	PUSHMARK (SP);
		915	EXTEND (SP, 2);
		916	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		917	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		918	PUTBACK;
		919	PL_op = (OP *)&myop;
		920	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		921	SPAGAIN;
		922	}
		923
		924	/*
		925	* this is a _very_ stripped down perl interpreter ;)
		926	*/
		927	static void
		928	cctx_run (void *arg)
		929	{
		930	dTHX;
		931
		932	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		933	UNLOCK;
		934
		935	/* we now skip the entersub that lead to transfer() */
		936	PL_op = PL_op->op_next;
		937
		938	/* inject a fake subroutine call to cctx_init */
		939	cctx_prepare (aTHX_ (coro_cctx *)arg);
		940
		941	/* somebody or something will hit me for both perl_run and PL_restartop */
		942	PL_restartop = PL_op;
		943	perl_run (PL_curinterp);
		944
		945	/*
		946	* If perl-run returns we assume exit() was being called or the coro
		947	* fell off the end, which seems to be the only valid (non-bug)
		948	* reason for perl_run to return. We try to exit by jumping to the
		949	* bootstrap-time "top" top_env, as we cannot restore the "main"
		950	* coroutine as Coro has no such concept
		951	*/
		952	PL_top_env = main_top_env;
		953	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		954	}
		955
		956	static coro_cctx *
		957	cctx_new ()
		958	{
		959	coro_cctx *cctx;
		960	void *stack_start;
		961	size_t stack_size;
		962
		963	++cctx_count;
		964
		965	Newz (0, cctx, 1, coro_cctx);
		966
		967	#if HAVE_MMAP
		968	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		969	/* mmap supposedly does allocate-on-write for us */
		970	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		971
		972	if (cctx->sptr != (void *)-1)
		973	{
		974	# if CORO_STACKGUARD
		975	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		976	# endif
		977	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		978	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		979	cctx->flags \|= CC_MAPPED;
		980	}
		981	else
		982	#endif
		983	{
		984	cctx->ssize = coro_stacksize * (long)sizeof (long);
		985	New (0, cctx->sptr, coro_stacksize, long);
		986
		987	if (!cctx->sptr)
		988	{
		989	perror ("FATAL: unable to allocate stack for coroutine");
		990	_exit (EXIT_FAILURE);
		991	}
		992
		993	stack_start = cctx->sptr;
		994	stack_size = cctx->ssize;
		995	}
		996
		997	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		998	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		999
		1000	return cctx;
		1001	}
		1002
		1003	static void
		1004	cctx_destroy (coro_cctx *cctx)
		1005	{
		1006	if (!cctx)
		1007	return;
		1008
		1009	--cctx_count;
		1010
		1011	#if CORO_USE_VALGRIND
		1012	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1013	#endif
		1014
		1015	#if HAVE_MMAP
		1016	if (cctx->flags & CC_MAPPED)
		1017	munmap (cctx->sptr, cctx->ssize);
		1018	else
		1019	#endif
		1020	Safefree (cctx->sptr);
		1021
		1022	Safefree (cctx);
		1023	}
		1024
		1025	/* wether this cctx should be destructed */
		1026	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1027
		1028	static coro_cctx *
		1029	cctx_get (pTHX)
		1030	{
		1031	while (expect_true (cctx_first))
		1032	{
		1033	coro_cctx *cctx = cctx_first;
		1034	cctx_first = cctx->next;
		1035	--cctx_idle;
		1036
		1037	if (expect_true (!CCTX_EXPIRED (cctx)))
		1038	return cctx;
		1039
		1040	cctx_destroy (cctx);
		1041	}
		1042
		1043	return cctx_new ();
		1044	}
		1045
		1046	static void
		1047	cctx_put (coro_cctx *cctx)
		1048	{
		1049	/* free another cctx if overlimit */
		1050	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1051	{
		1052	coro_cctx *first = cctx_first;
		1053	cctx_first = first->next;
		1054	--cctx_idle;
		1055
		1056	cctx_destroy (first);
		1057	}
		1058
		1059	++cctx_idle;
		1060	cctx->next = cctx_first;
		1061	cctx_first = cctx;
		1062	}
		1063
		1064	/ coroutine switching ***************************************************/
		1065
		1066	static void
		1067	transfer_check (pTHX_ struct coro prev, struct coro next)
		1068	{
		1069	if (expect_true (prev != next))
		1070	{
		1071	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1072	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1073
		1074	if (expect_false (next->flags & CF_RUNNING))
		1075	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1076
		1077	if (expect_false (next->flags & CF_DESTROYED))
		1078	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1079
		1080	if (
		1081	#if PERL_VERSION_ATLEAST (5,9,0)
		1082	expect_false (PL_parser)
		1083	#else
		1084	expect_false (PL_lex_state != LEX_NOTPARSING)
		1085	#endif
		1086	)
		1087	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1088	}
		1089	}
		1090
		1091	/* always use the TRANSFER macro */
		1092	static void NOINLINE
		1093	transfer (pTHX_ struct coro prev, struct coro next)
		1094	{
		1095	dSTACKLEVEL;
		1096
		1097	/* sometimes transfer is only called to set idle_sp */
		1098	if (expect_false (!next))
		1099	{
		1100	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1101	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1102	}
		1103	else if (expect_true (prev != next))
		1104	{
		1105	coro_cctx *prev__cctx;
		1106
		1107	if (expect_false (prev->flags & CF_NEW))
		1108	{
		1109	/* create a new empty context */
		1110	Newz (0, prev->cctx, 1, coro_cctx);
		1111	prev->flags &= ~CF_NEW;
		1112	prev->flags \|= CF_RUNNING;
		1113	}
		1114
		1115	prev->flags &= ~CF_RUNNING;
		1116	next->flags \|= CF_RUNNING;
		1117
		1118	LOCK;
		1119
		1120	if (expect_false (next->flags & CF_NEW))
		1121	{
		1122	/* need to start coroutine */
		1123	next->flags &= ~CF_NEW;
		1124	/* first get rid of the old state */
		1125	save_perl (aTHX_ prev);
		1126	/* setup coroutine call */
		1127	coro_setup (aTHX_ next);
		1128	}
		1129	else
		1130	{
		1131	/* coroutine already started */
		1132	save_perl (aTHX_ prev);
		1133	load_perl (aTHX_ next);
		1134	}
		1135
		1136	prev__cctx = prev->cctx;
		1137
		1138	/* possibly "free" the cctx */
		1139	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1140	{
		1141	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1142	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1143
		1144	prev->cctx = 0;
		1145
		1146	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1147	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1148	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1149	if (!next->cctx)
		1150	next->cctx = cctx_get (aTHX);
		1151
		1152	cctx_put (prev__cctx);
		1153	}
		1154
		1155	++next->usecount;
		1156
		1157	if (expect_true (!next->cctx))
		1158	next->cctx = cctx_get (aTHX);
		1159
		1160	if (expect_false (prev__cctx != next->cctx))
		1161	{
		1162	prev__cctx->top_env = PL_top_env;
		1163	PL_top_env = next->cctx->top_env;
		1164	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1165	}
		1166
		1167	free_coro_mortal (aTHX);
		1168	UNLOCK;
		1169
		1170	if (expect_false (prev->throw \|\| next->throw))
		1171	{
		1172	struct coro *coro = SvSTATE (coro_current);
		1173
		1174	if (coro->throw)
		1175	{
		1176	SV *exception = coro->throw;
		1177	coro->throw = 0;
		1178	sv_setsv (ERRSV, exception);
		1179	croak (0);
		1180	}
		1181	}
		1182	}
		1183	}
		1184
		1185	struct transfer_args
		1186	{
		1187	struct coro prev, next;
		1188	};
		1189
		1190	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1191	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1192
		1193	/ high level stuff ******************************************************/
		1194
		1195	static int
		1196	coro_state_destroy (pTHX_ struct coro *coro)
		1197	{
		1198	if (coro->flags & CF_DESTROYED)
		1199	return 0;
		1200
		1201	coro->flags \|= CF_DESTROYED;
		1202
		1203	if (coro->flags & CF_READY)
		1204	{
		1205	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1206	/* alternative: look through all ready queues and remove the coro */
		1207	LOCK;
		1208	--coro_nready;
		1209	UNLOCK;
		1210	}
		1211	else
		1212	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1213
		1214	if (coro->mainstack && coro->mainstack != main_mainstack)
		1215	{
		1216	struct coro temp;
		1217
		1218	if (coro->flags & CF_RUNNING)
		1219	croak ("FATAL: tried to destroy currently running coroutine");
		1220
		1221	save_perl (aTHX_ &temp);
		1222	load_perl (aTHX_ coro);
		1223
		1224	coro_destroy (aTHX_ coro);
		1225
		1226	load_perl (aTHX_ &temp);
		1227
		1228	coro->slot = 0;
		1229	}
		1230
		1231	cctx_destroy (coro->cctx);
		1232	SvREFCNT_dec (coro->args);
		1233
		1234	if (coro->next) coro->next->prev = coro->prev;
		1235	if (coro->prev) coro->prev->next = coro->next;
		1236	if (coro == coro_first) coro_first = coro->next;
		1237
		1238	return 1;
		1239	}
		1240
		1241	static int
		1242	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1243	{
		1244	struct coro coro = (struct coro )mg->mg_ptr;
		1245	mg->mg_ptr = 0;
		1246
		1247	coro->hv = 0;
		1248
		1249	if (--coro->refcnt < 0)
		1250	{
		1251	coro_state_destroy (aTHX_ coro);
		1252	Safefree (coro);
		1253	}
		1254
		1255	return 0;
		1256	}
		1257
		1258	static int
		1259	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1260	{
		1261	struct coro coro = (struct coro )mg->mg_ptr;
		1262
		1263	++coro->refcnt;
		1264
		1265	return 0;
		1266	}
		1267
		1268	static MGVTBL coro_state_vtbl = {
		1269	0, 0, 0, 0,
		1270	coro_state_free,
		1271	0,
		1272	#ifdef MGf_DUP
		1273	coro_state_dup,
		1274	#else
		1275	# define MGf_DUP 0
		1276	#endif
		1277	};
		1278
		1279	static void
		1280	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1281	{
		1282	ta->prev = SvSTATE (prev_sv);
		1283	ta->next = SvSTATE (next_sv);
		1284	TRANSFER_CHECK (*ta);
		1285	}
		1286
		1287	static void
		1288	api_transfer (SV prev_sv, SV next_sv)
		1289	{
		1290	dTHX;
		1291	struct transfer_args ta;
		1292
		1293	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1294	TRANSFER (ta);
		1295	}
		1296
		1297	/ Coro ******************************************************************/
		1298
		1299	static void
		1300	coro_enq (pTHX_ SV *coro_sv)
		1301	{
		1302	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
814	}	1303	}
815		1304
816	static SV *	1305	static SV *
817	coro_deq (int min_prio)	1306	coro_deq (pTHX_ int min_prio)
818	{	1307	{
819	int prio = PRIO_MAX - PRIO_MIN;	1308	int prio = PRIO_MAX - PRIO_MIN;
820		1309
821	min_prio -= PRIO_MIN;	1310	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	1311	if (min_prio < 0)
823	min_prio = 0;	1312	min_prio = 0;
824		1313
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1314	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	1315	if (AvFILLp (coro_ready [prio]) >= 0)
827	{
828	coro_nready--;
829	return av_shift (coro_ready[prio]);	1316	return av_shift (coro_ready [prio]);
830	}
831		1317
832	return 0;	1318	return 0;
833	}	1319	}
834		1320
835	static void	1321	static int
836	api_ready (SV *coro)	1322	api_ready (SV *coro_sv)
837	{	1323	{
		1324	dTHX;
		1325	struct coro *coro;
		1326
		1327	if (SvROK (coro_sv))
		1328	coro_sv = SvRV (coro_sv);
		1329
		1330	coro = SvSTATE (coro_sv);
		1331
		1332	if (coro->flags & CF_READY)
		1333	return 0;
		1334
		1335	coro->flags \|= CF_READY;
		1336
		1337	LOCK;
838	coro_enq (SvREFCNT_inc (coro));	1338	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
839	}	1339	++coro_nready;
		1340	UNLOCK;
840		1341
		1342	return 1;
		1343	}
		1344
841	static void	1345	static int
842	api_schedule (int cede)	1346	api_is_ready (SV *coro_sv)
843	{	1347	{
		1348	dTHX;
		1349	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1350	}
		1351
		1352	static void
		1353	prepare_schedule (pTHX_ struct transfer_args *ta)
		1354	{
844	SV prev, next;	1355	SV prev_sv, next_sv;
845		1356
		1357	for (;;)
		1358	{
		1359	LOCK;
		1360	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1361
		1362	/* nothing to schedule: call the idle handler */
		1363	if (expect_false (!next_sv))
		1364	{
		1365	dSP;
		1366	UNLOCK;
		1367
		1368	ENTER;
		1369	SAVETMPS;
		1370
		1371	PUSHMARK (SP);
		1372	PUTBACK;
		1373	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1374
		1375	FREETMPS;
		1376	LEAVE;
		1377	continue;
		1378	}
		1379
		1380	ta->next = SvSTATE (next_sv);
		1381
		1382	/* cannot transfer to destroyed coros, skip and look for next */
		1383	if (expect_false (ta->next->flags & CF_DESTROYED))
		1384	{
		1385	UNLOCK;
		1386	SvREFCNT_dec (next_sv);
		1387	/* coro_nready is already taken care of by destroy */
		1388	continue;
		1389	}
		1390
		1391	--coro_nready;
		1392	UNLOCK;
		1393	break;
		1394	}
		1395
		1396	/* free this only after the transfer */
846	prev = GvSV (coro_current);	1397	prev_sv = SvRV (coro_current);
		1398	ta->prev = SvSTATE (prev_sv);
		1399	TRANSFER_CHECK (*ta);
		1400	assert (ta->next->flags & CF_READY);
		1401	ta->next->flags &= ~CF_READY;
		1402	SvRV_set (coro_current, next_sv);
847		1403
848	if (cede)	1404	LOCK;
849	coro_enq (SvREFCNT_inc (prev));	1405	free_coro_mortal (aTHX);
850		1406	coro_mortal = prev_sv;
851	next = coro_deq (PRIO_MIN);	1407	UNLOCK;
852
853	if (!next)
854	next = SvREFCNT_inc (GvSV (coro_idle));
855
856	GvSV (coro_current) = SvREFCNT_inc (next);
857	transfer (aTHX_
858	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
859	sv_to_coro (next, "Coro::schedule", "next coroutine"),
860	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
861	SvREFCNT_dec (next);
862	SvREFCNT_dec (prev);
863	}	1408	}
864		1409
		1410	static void
		1411	prepare_cede (pTHX_ struct transfer_args *ta)
		1412	{
		1413	api_ready (coro_current);
		1414	prepare_schedule (aTHX_ ta);
		1415	}
		1416
		1417	static int
		1418	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1419	{
		1420	if (coro_nready)
		1421	{
		1422	SV *prev = SvRV (coro_current);
		1423	prepare_schedule (aTHX_ ta);
		1424	api_ready (prev);
		1425	return 1;
		1426	}
		1427	else
		1428	return 0;
		1429	}
		1430
		1431	static void
		1432	api_schedule (void)
		1433	{
		1434	dTHX;
		1435	struct transfer_args ta;
		1436
		1437	prepare_schedule (aTHX_ &ta);
		1438	TRANSFER (ta);
		1439	}
		1440
		1441	static int
		1442	api_cede (void)
		1443	{
		1444	dTHX;
		1445	struct transfer_args ta;
		1446
		1447	prepare_cede (aTHX_ &ta);
		1448
		1449	if (expect_true (ta.prev != ta.next))
		1450	{
		1451	TRANSFER (ta);
		1452	return 1;
		1453	}
		1454	else
		1455	return 0;
		1456	}
		1457
		1458	static int
		1459	api_cede_notself (void)
		1460	{
		1461	dTHX;
		1462	struct transfer_args ta;
		1463
		1464	if (prepare_cede_notself (aTHX_ &ta))
		1465	{
		1466	TRANSFER (ta);
		1467	return 1;
		1468	}
		1469	else
		1470	return 0;
		1471	}
		1472
		1473	static void
		1474	api_trace (SV *coro_sv, int flags)
		1475	{
		1476	dTHX;
		1477	struct coro *coro = SvSTATE (coro_sv);
		1478
		1479	if (flags & CC_TRACE)
		1480	{
		1481	if (!coro->cctx)
		1482	coro->cctx = cctx_new ();
		1483	else if (!(coro->cctx->flags & CC_TRACE))
		1484	croak ("cannot enable tracing on coroutine with custom stack");
		1485
		1486	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1487	}
		1488	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1489	{
		1490	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1491
		1492	if (coro->flags & CF_RUNNING)
		1493	PL_runops = RUNOPS_DEFAULT;
		1494	else
		1495	coro->slot->runops = RUNOPS_DEFAULT;
		1496	}
		1497	}
		1498
865	MODULE = Coro::State PACKAGE = Coro::State	1499	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
866		1500
867	PROTOTYPES: ENABLE	1501	PROTOTYPES: DISABLE
868		1502
869	BOOT:	1503	BOOT:
870	{ /* {} necessary for stoopid perl-5.6.x */	1504	{
871	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1505	#ifdef USE_ITHREADS
872	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1506	MUTEX_INIT (&coro_mutex);
		1507	#endif
		1508	BOOT_PAGESIZE;
		1509
		1510	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1511	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1512
		1513	hv_sig = coro_get_hv ("SIG", TRUE);
		1514	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1515	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1516
		1517	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1518	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1519
873	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1520	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
874		1521
875	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1522	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
876	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1523	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
877	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1524	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
878	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1525	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
879
880	if (!padlist_cache)
881	padlist_cache = newHV ();
882		1526
883	main_mainstack = PL_mainstack;	1527	main_mainstack = PL_mainstack;
		1528	main_top_env = PL_top_env;
		1529
		1530	while (main_top_env->je_prev)
		1531	main_top_env = main_top_env->je_prev;
884		1532
885	coroapi.ver = CORO_API_VERSION;	1533	coroapi.ver = CORO_API_VERSION;
		1534	coroapi.rev = CORO_API_REVISION;
886	coroapi.transfer = api_transfer;	1535	coroapi.transfer = api_transfer;
887	}
888		1536
889	Coro::State	1537	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
890	_newprocess(args)	1538	}
891	SV * args	1539
892	PROTOTYPE: $	1540	SV *
		1541	new (char *klass, ...)
893	CODE:	1542	CODE:
894	Coro__State coro;	1543	{
		1544	struct coro *coro;
		1545	HV *hv;
		1546	int i;
895		1547
896	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
897	croak ("Coro::State::_newprocess expects an arrayref");
898
899	New (0, coro, 1, struct coro);	1548	Newz (0, coro, 1, struct coro);
		1549	coro->args = newAV ();
		1550	coro->flags = CF_NEW;
900		1551
901	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1552	if (coro_first) coro_first->prev = coro;
902	coro->mainstack = 0; /* actual work is done inside transfer */	1553	coro->next = coro_first;
903	coro->stack = 0;	1554	coro_first = coro;
904		1555
905	RETVAL = coro;	1556	coro->hv = hv = newHV ();
		1557	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1558	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1559
		1560	av_extend (coro->args, items - 1);
		1561	for (i = 1; i < items; i++)
		1562	av_push (coro->args, newSVsv (ST (i)));
		1563	}
906	OUTPUT:	1564	OUTPUT:
907	RETVAL	1565	RETVAL
908		1566
		1567	# these not obviously related functions are all rolled into the same xs
		1568	# function to increase chances that they all will call transfer with the same
		1569	# stack offset
909	void	1570	void
910	transfer(prev, next, flags)	1571	_set_stacklevel (...)
911	Coro::State_or_hashref prev	1572	ALIAS:
912	Coro::State_or_hashref next	1573	Coro::State::transfer = 1
913	int flags	1574	Coro::schedule = 2
914	PROTOTYPE: @	1575	Coro::cede = 3
		1576	Coro::cede_notself = 4
915	CODE:	1577	CODE:
		1578	{
		1579	struct transfer_args ta;
		1580
		1581	switch (ix)
		1582	{
		1583	case 0:
		1584	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1585	ta.next = 0;
		1586	break;
		1587
		1588	case 1:
		1589	if (items != 2)
		1590	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1591
		1592	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1593	break;
		1594
		1595	case 2:
		1596	prepare_schedule (aTHX_ &ta);
		1597	break;
		1598
		1599	case 3:
		1600	prepare_cede (aTHX_ &ta);
		1601	break;
		1602
		1603	case 4:
		1604	if (!prepare_cede_notself (aTHX_ &ta))
		1605	XSRETURN_EMPTY;
		1606
		1607	break;
		1608	}
		1609
		1610	BARRIER;
916	PUTBACK;	1611	PUTBACK;
917	transfer (aTHX_ prev, next, flags);	1612	TRANSFER (ta);
918	SPAGAIN;	1613	SPAGAIN; /* might be the sp of a different coroutine now */
		1614	/* be extra careful not to ever do anything after TRANSFER */
		1615	}
		1616
		1617	bool
		1618	_destroy (SV *coro_sv)
		1619	CODE:
		1620	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1621	OUTPUT:
		1622	RETVAL
919		1623
920	void	1624	void
921	DESTROY(coro)
922	Coro::State coro
923	CODE:
924
925	if (coro->mainstack && coro->mainstack != main_mainstack)
926	{
927	struct coro temp;
928
929	PUTBACK;
930	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
931	LOAD(aTHX_ coro);
932	SPAGAIN;
933
934	destroy_stacks (aTHX);
935
936	LOAD((&temp)); /* this will get rid of defsv etc.. */
937	SPAGAIN;
938
939	coro->mainstack = 0;
940	}
941
942	deallocate_stack (coro);
943
944	Safefree (coro);
945
946	void
947	flush()
948	CODE:
949	#ifdef MAY_FLUSH
950	flush_padlist_cache ();
951	#endif
952
953	void
954	_exit(code)	1625	_exit (code)
955	int code	1626	int code
956	PROTOTYPE: $	1627	PROTOTYPE: $
957	CODE:	1628	CODE:
958	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
959	_exit (code);	1629	_exit (code);
960	#else
961	signal (SIGTERM, SIG_DFL);
962	raise (SIGTERM);
963	exit (code);
964	#endif
965		1630
966	MODULE = Coro::State PACKAGE = Coro::Cont	1631	int
		1632	cctx_stacksize (int new_stacksize = 0)
		1633	CODE:
		1634	RETVAL = coro_stacksize;
		1635	if (new_stacksize)
		1636	coro_stacksize = new_stacksize;
		1637	OUTPUT:
		1638	RETVAL
967		1639
968	# this is slightly dirty (should expose a c-level api)	1640	int
		1641	cctx_count ()
		1642	CODE:
		1643	RETVAL = cctx_count;
		1644	OUTPUT:
		1645	RETVAL
		1646
		1647	int
		1648	cctx_idle ()
		1649	CODE:
		1650	RETVAL = cctx_idle;
		1651	OUTPUT:
		1652	RETVAL
969		1653
970	void	1654	void
971	yield(...)	1655	list ()
972	PROTOTYPE: @	1656	PPCODE:
		1657	{
		1658	struct coro *coro;
		1659	for (coro = coro_first; coro; coro = coro->next)
		1660	if (coro->hv)
		1661	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1662	}
		1663
		1664	void
		1665	call (Coro::State coro, SV *coderef)
		1666	ALIAS:
		1667	eval = 1
		1668	CODE:
		1669	{
		1670	if (coro->mainstack)
		1671	{
		1672	struct coro temp;
		1673
		1674	if (!(coro->flags & CF_RUNNING))
		1675	{
		1676	save_perl (aTHX_ &temp);
		1677	load_perl (aTHX_ coro);
		1678	}
		1679
		1680	{
		1681	dSP;
		1682	ENTER;
		1683	SAVETMPS;
		1684	PUTBACK;
		1685	PUSHSTACK;
		1686	PUSHMARK (SP);
		1687
		1688	if (ix)
		1689	eval_sv (coderef, 0);
		1690	else
		1691	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1692
		1693	POPSTACK;
		1694	SPAGAIN;
		1695	FREETMPS;
		1696	LEAVE;
		1697	PUTBACK;
		1698	}
		1699
		1700	if (!(coro->flags & CF_RUNNING))
		1701	{
		1702	save_perl (aTHX_ coro);
		1703	load_perl (aTHX_ &temp);
		1704	}
		1705	}
		1706	}
		1707
		1708	SV *
		1709	is_ready (Coro::State coro)
		1710	PROTOTYPE: $
		1711	ALIAS:
		1712	is_ready = CF_READY
		1713	is_running = CF_RUNNING
		1714	is_new = CF_NEW
		1715	is_destroyed = CF_DESTROYED
		1716	CODE:
		1717	RETVAL = boolSV (coro->flags & ix);
		1718	OUTPUT:
		1719	RETVAL
		1720
		1721	void
		1722	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1723
		1724	SV *
		1725	has_stack (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = boolSV (!!coro->cctx);
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	int
		1733	is_traced (Coro::State coro)
		1734	PROTOTYPE: $
		1735	CODE:
		1736	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1737	OUTPUT:
		1738	RETVAL
		1739
		1740	IV
		1741	rss (Coro::State coro)
		1742	PROTOTYPE: $
		1743	ALIAS:
		1744	usecount = 1
973	CODE:	1745	CODE:
974	static SV *returnstk;	1746	switch (ix)
975	SV *sv;	1747	{
976	AV *defav = GvAV (PL_defgv);	1748	case 0: RETVAL = coro_rss (aTHX_ coro); break;
977	struct coro prev, next;	1749	case 1: RETVAL = coro->usecount; break;
		1750	}
		1751	OUTPUT:
		1752	RETVAL
978		1753
979	if (!returnstk)
980	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
981
982	/* set up @_ -- ugly */
983	av_clear (defav);
984	av_fill (defav, items - 1);
985	while (items--)
986	av_store (defav, items, SvREFCNT_inc (ST(items)));
987
988	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
989	sv = av_pop ((AV *)SvRV (returnstk));
990	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
991	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
992	SvREFCNT_dec (sv);
993
994	transfer(aTHX_ prev, next, 0);
995		1754
996	MODULE = Coro::State PACKAGE = Coro	1755	MODULE = Coro::State PACKAGE = Coro
997		1756
998	# this is slightly dirty (should expose a c-level api)
999
1000	BOOT:	1757	BOOT:
1001	{	1758	{
1002	int i;	1759	int i;
		1760
		1761	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1762	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1763	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1764
		1765	coro_current = coro_get_sv ("Coro::current", FALSE);
		1766	SvREADONLY_on (coro_current);
		1767
1003	HV *stash = gv_stashpv ("Coro", TRUE);	1768	coro_stash = gv_stashpv ("Coro", TRUE);
1004		1769
1005	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1770	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1006	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1771	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1007	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1772	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1008	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1773	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1009	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1774	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1010	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1775	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1011
1012	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1013	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1014		1776
1015	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1777	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1016	coro_ready[i] = newAV ();	1778	coro_ready[i] = newAV ();
1017		1779
1018	{	1780	{
1019	SV *sv = perl_get_sv("Coro::API", 1);	1781	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1782	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1020		1783
1021	coroapi.schedule = api_schedule;	1784	coroapi.schedule = api_schedule;
		1785	coroapi.cede = api_cede;
		1786	coroapi.cede_notself = api_cede_notself;
1022	coroapi.ready = api_ready;	1787	coroapi.ready = api_ready;
		1788	coroapi.is_ready = api_is_ready;
1023	coroapi.nready = &coro_nready;	1789	coroapi.nready = &coro_nready;
1024	coroapi.current = coro_current;	1790	coroapi.current = coro_current;
1025		1791
1026	GCoroAPI = &coroapi;	1792	GCoroAPI = &coroapi;
1027	sv_setiv(sv, (IV)&coroapi);	1793	sv_setiv (sv, (IV)&coroapi);
1028	SvREADONLY_on(sv);	1794	SvREADONLY_on (sv);
1029	}	1795	}
1030	}	1796	}
1031		1797
1032	void	1798	void
1033	ready(self)	1799	_set_current (SV *current)
1034	SV * self	1800	PROTOTYPE: $
1035	CODE:	1801	CODE:
1036	api_ready (self);	1802	SvREFCNT_dec (SvRV (coro_current));
		1803	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1037		1804
1038	int	1805	int
		1806	prio (Coro::State coro, int newprio = 0)
		1807	ALIAS:
		1808	nice = 1
		1809	CODE:
		1810	{
		1811	RETVAL = coro->prio;
		1812
		1813	if (items > 1)
		1814	{
		1815	if (ix)
		1816	newprio = coro->prio - newprio;
		1817
		1818	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1819	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1820
		1821	coro->prio = newprio;
		1822	}
		1823	}
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	SV *
		1828	ready (SV *self)
		1829	PROTOTYPE: $
		1830	CODE:
		1831	RETVAL = boolSV (api_ready (self));
		1832	OUTPUT:
		1833	RETVAL
		1834
		1835	int
1039	nready(...)	1836	nready (...)
1040	PROTOTYPE:	1837	PROTOTYPE:
1041	CODE:	1838	CODE:
1042	RETVAL = coro_nready;	1839	RETVAL = coro_nready;
1043	OUTPUT:	1840	OUTPUT:
1044	RETVAL	1841	RETVAL
1045		1842
1046	void	1843	void
1047	schedule(...)	1844	throw (Coro::State self, SV *throw = &PL_sv_undef)
1048	PROTOTYPE:	1845	PROTOTYPE: $;$
1049	ALIAS:	1846	CODE:
1050	cede = 1	1847	SvREFCNT_dec (self->throw);
		1848	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1849
		1850	# for async_pool speedup
		1851	void
		1852	_pool_1 (SV *cb)
1051	CODE:	1853	CODE:
1052	api_schedule (ix);	1854	{
		1855	struct coro *coro = SvSTATE (coro_current);
		1856	HV hv = (HV )SvRV (coro_current);
		1857	AV *defav = GvAV (PL_defgv);
		1858	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1859	AV *invoke_av;
		1860	int i, len;
1053		1861
		1862	if (!invoke)
		1863	croak ("\3async_pool terminate\2\n");
		1864
		1865	SvREFCNT_dec (coro->saved_deffh);
		1866	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1867
		1868	hv_store (hv, "desc", sizeof ("desc") - 1,
		1869	newSVpvn (strpair ("[async_pool]")), 0);
		1870
		1871	invoke_av = (AV *)SvRV (invoke);
		1872	len = av_len (invoke_av);
		1873
		1874	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1875
		1876	if (len > 0)
		1877	{
		1878	av_fill (defav, len - 1);
		1879	for (i = 0; i < len; ++i)
		1880	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1881	}
		1882
		1883	SvREFCNT_dec (invoke);
		1884	}
		1885
		1886	void
		1887	_pool_2 (SV *cb)
		1888	CODE:
		1889	{
		1890	struct coro *coro = SvSTATE (coro_current);
		1891
		1892	sv_setsv (cb, &PL_sv_undef);
		1893
		1894	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1895	coro->saved_deffh = 0;
		1896
		1897	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1898	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1899	croak ("\3async_pool terminate\2\n");
		1900
		1901	av_clear (GvAV (PL_defgv));
		1902	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1903	newSVpvn (strpair ("[async_pool idle]")), 0);
		1904
		1905	coro->prio = 0;
		1906
		1907	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1908	api_trace (coro_current, 0);
		1909
		1910	av_push (av_async_pool, newSVsv (coro_current));
		1911	}
		1912
		1913
		1914	MODULE = Coro::State PACKAGE = Coro::AIO
		1915
		1916	SV *
		1917	_get_state ()
		1918	CODE:
		1919	{
		1920	struct io_state *data;
		1921
		1922	RETVAL = newSV (sizeof (struct io_state));
		1923	data = (struct io_state *)SvPVX (RETVAL);
		1924	SvCUR_set (RETVAL, sizeof (struct io_state));
		1925	SvPOK_only (RETVAL);
		1926
		1927	data->errorno = errno;
		1928	data->laststype = PL_laststype;
		1929	data->laststatval = PL_laststatval;
		1930	data->statcache = PL_statcache;
		1931	}
		1932	OUTPUT:
		1933	RETVAL
		1934
		1935	void
		1936	_set_state (char *data_)
		1937	PROTOTYPE: $
		1938	CODE:
		1939	{
		1940	struct io_state data = (void )data_;
		1941
		1942	errno = data->errorno;
		1943	PL_laststype = data->laststype;
		1944	PL_laststatval = data->laststatval;
		1945	PL_statcache = data->statcache;
		1946	}
		1947

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Comparing Coro/Coro/State.xs (file contents): Revision 1.29 by root, Sat Aug 25 21:40:34 2001 UTC vs. Revision 1.211 by root, Wed Oct 10 03:37:58 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.29 by root, Sat Aug 25 21:40:34 2001 UTC vs.
Revision 1.211 by root, Wed Oct 10 03:37:58 2007 UTC