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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.34 by root, Fri Sep 14 15:40:56 2001 UTC vs.
Revision 1.212 by root, Wed Oct 10 04:21:33 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 IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		109
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	110	#if __GNUC__ >= 3
		111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
		114	#else
		115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
		118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
		122
		123	#define NOINLINE attribute ((noinline))
34		124
35	#include "CoroAPI.h"	125	#include "CoroAPI.h"
36		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	/* helper storage struct for Coro::AIO */
		137	struct io_state
		138	{
		139	int errorno;
		140	I32 laststype;
		141	int laststatval;
		142	Stat_t statcache;
		143	};
		144
		145	static size_t coro_stacksize = CORO_STACKSIZE;
37	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
		147	static AV main_mainstack; / used to differentiate between $main and others */
		148	static JMPENV *main_top_env;
		149	static HV coro_state_stash, coro_stash;
		150	static SV coro_mortal; / will be freed after next transfer */
38		151
39	/* this is actually not only the c stack but also c registers etc... */	152	static GV irsgv; / $/ */
		153	static GV stdoutgv; / STDOUT /
		154
		155	static HV hv_sig; / %SIG */
		156	static SV *sv_diehook;
		157	static SV *sv_warnhook;
		158
		159	/* async_pool helper stuff */
		160	static SV *sv_pool_rss;
		161	static SV *sv_pool_size;
		162	static AV *av_async_pool;
		163
		164	static struct coro_cctx *cctx_first;
		165	static int cctx_count, cctx_idle;
		166
		167	enum {
		168	CC_MAPPED = 0x01,
		169	CC_NOREUSE = 0x02, /* throw this away after tracing */
		170	CC_TRACE = 0x04,
		171	CC_TRACE_SUB = 0x08, /* trace sub calls */
		172	CC_TRACE_LINE = 0x10, /* trace each statement */
		173	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		174	};
		175
		176	/* this is a structure representing a c-level coroutine */
		177	typedef struct coro_cctx {
		178	struct coro_cctx *next;
		179
		180	/* the stack */
		181	void *sptr;
		182	size_t ssize;
		183
		184	/* cpu state */
		185	void idle_sp; / sp of top-level transfer/schedule/cede call */
		186	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		187	JMPENV *top_env;
		188	coro_context cctx;
		189
		190	#if CORO_USE_VALGRIND
		191	int valgrind_id;
		192	#endif
		193	unsigned char flags;
		194	} coro_cctx;
		195
		196	enum {
		197	CF_RUNNING = 0x0001, /* coroutine is running */
		198	CF_READY = 0x0002, /* coroutine is ready */
		199	CF_NEW = 0x0004, /* has never been switched to */
		200	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		201	};
		202
		203	/* the structure where most of the perl state is stored, overlaid on the cxstack */
40	typedef struct {	204	typedef struct {
41	int refcnt; /* pointer reference counter */	205	SV *defsv;
42	int usecnt; /* shared by how many coroutines */	206	AV *defav;
43	int gencnt; /* generation counter */	207	SV *errsv;
		208	SV *irsgv;
		209	#define VAR(name,type) type name;
		210	# include "state.h"
		211	#undef VAR
		212	} perl_slots;
44		213
45	coro_context cctx;	214	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
46		215
47	void *sptr;	216	/* this is a structure representing a perl-level coroutine */
48	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50
51	struct coro {	217	struct coro {
52	/* the optional C context */	218	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	219	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56		220
57	/* optionally saved, might be zero */	221	/* process data */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;	222	AV *mainstack;
70	SV **stack_sp;	223	perl_slots slot; / basically the saved sp */
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	JMPENV *top_env;
93		224
94	/* data associated with this coroutine (initial args) */	225	AV args; / data associated with this coroutine (initial args) */
95	AV *args;	226	int refcnt; /* coroutines are refcounted, yes */
		227	int flags; /* CF_ flags */
		228	HV hv; / the perl hash associated with this coro, if any */
		229
		230	/* statistics */
		231	int usecount; /* number of transfers to this coro */
		232
		233	/* coro process data */
		234	int prio;
		235	SV throw; / exception to be thrown */
		236
		237	/* async_pool */
		238	SV *saved_deffh;
		239
		240	/* linked list */
		241	struct coro next, prev;
96	};	242	};
97		243
98	typedef struct coro *Coro__State;	244	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	245	typedef struct coro *Coro__State_or_hashref;
100
101	static AV main_mainstack; / used to differentiate between $main and others */
102	static HV *coro_state_stash;
103	static SV *ucoro_state_sv;
104	static U32 ucoro_state_hash;
105	static HV *padlist_cache;
106
107	/* mostly copied from op.c:cv_clone2 */
108	STATIC AV *
109	clone_padlist (AV *protopadlist)
110	{
111	AV *av;
112	I32 ix;
113	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
114	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
115	SV **pname = AvARRAY (protopad_name);
116	SV **ppad = AvARRAY (protopad);
117	I32 fname = AvFILLp (protopad_name);
118	I32 fpad = AvFILLp (protopad);
119	AV newpadlist, newpad_name, *newpad;
120	SV **npad;
121
122	newpad_name = newAV ();
123	for (ix = fname; ix >= 0; ix--)
124	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126	newpad = newAV ();
127	av_fill (newpad, AvFILLp (protopad));
128	npad = AvARRAY (newpad);
129
130	newpadlist = newAV ();
131	AvREAL_off (newpadlist);
132	av_store (newpadlist, 0, (SV *) newpad_name);
133	av_store (newpadlist, 1, (SV *) newpad);
134
135	av = newAV (); /* will be @_ */
136	av_extend (av, 0);
137	av_store (newpad, 0, (SV *) av);
138	AvFLAGS (av) = AVf_REIFY;
139
140	for (ix = fpad; ix > 0; ix--)
141	{
142	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
143	if (namesv && namesv != &PL_sv_undef)
144	{
145	char name = SvPVX (namesv); / XXX */
146	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
147	{ /* lexical from outside? */
148	npad[ix] = SvREFCNT_inc (ppad[ix]);
149	}
150	else
151	{ /* our own lexical */
152	SV *sv;
153	if (*name == '&')
154	sv = SvREFCNT_inc (ppad[ix]);
155	else if (*name == '@')
156	sv = (SV *) newAV ();
157	else if (*name == '%')
158	sv = (SV *) newHV ();
159	else
160	sv = NEWSV (0, 0);
161	if (!SvPADBUSY (sv))
162	SvPADMY_on (sv);
163	npad[ix] = sv;
164	}
165	}
166	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
167	{
168	npad[ix] = SvREFCNT_inc (ppad[ix]);
169	}
170	else
171	{
172	SV *sv = NEWSV (0, 0);
173	SvPADTMP_on (sv);
174	npad[ix] = sv;
175	}
176	}
177
178	#if 0 /* return -ENOTUNDERSTOOD */
179	/* Now that vars are all in place, clone nested closures. */
180
181	for (ix = fpad; ix > 0; ix--) {
182	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
183	if (namesv
184	&& namesv != &PL_sv_undef
185	&& !(SvFLAGS(namesv) & SVf_FAKE)
186	&& *SvPVX(namesv) == '&'
187	&& CvCLONE(ppad[ix]))
188	{
189	CV kid = cv_clone((CV)ppad[ix]);
190	SvREFCNT_dec(ppad[ix]);
191	CvCLONE_on(kid);
192	SvPADMY_on(kid);
193	npad[ix] = (SV*)kid;
194	}
195	}
196	#endif
197
198	return newpadlist;
199	}
200
201	#ifdef MAY_FLUSH
202	STATIC void
203	free_padlist (AV *padlist)
204	{
205	/* may be during global destruction */
206	if (SvREFCNT(padlist))
207	{
208	I32 i = AvFILLp(padlist);
209	while (i >= 0)
210	{
211	SV **svp = av_fetch(padlist, i--, FALSE);
212	SV sv = svp ? svp : Nullsv;
213	if (sv)
214	SvREFCNT_dec(sv);
215	}
216
217	SvREFCNT_dec((SV*)padlist);
218	}
219	}
220	#endif
221
222	/* the next two functions merely cache the padlists */
223	STATIC void
224	get_padlist (CV *cv)
225	{
226	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
227
228	if (he && AvFILLp ((AV )he) >= 0)
229	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
230	else
231	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232	}
233
234	STATIC void
235	put_padlist (CV *cv)
236	{
237	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
238
239	if (SvTYPE (*he) != SVt_PVAV)
240	{
241	SvREFCNT_dec (*he);
242	he = (SV )newAV ();
243	}
244
245	av_push ((AV )he, (SV *)CvPADLIST (cv));
246	}
247
248	#ifdef MAY_FLUSH
249	STATIC void
250	flush_padlist_cache ()
251	{
252	HV *hv = padlist_cache;
253	padlist_cache = newHV ();
254
255	if (hv_iterinit (hv))
256	{
257	HE *he;
258	AV *padlist;
259
260	while (!!(he = hv_iternext (hv)))
261	{
262	AV av = (AV )HeVAL(he);
263
264	/* casting is fun. */
265	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
266	free_padlist (padlist);
267	}
268	}
269
270	SvREFCNT_dec (hv);
271	}
272	#endif
273
274	#define SB do {
275	#define SE } while (0)
276
277	#define LOAD(state) load_state(aTHX_ (state));
278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
279
280	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
281
282	static void
283	load_state(pTHX_ Coro__State c)
284	{
285	PL_dowarn = c->dowarn;
286	PL_in_eval = c->in_eval;
287
288	PL_curstackinfo = c->curstackinfo;
289	PL_curstack = c->curstack;
290	PL_mainstack = c->mainstack;
291	PL_stack_sp = c->stack_sp;
292	PL_op = c->op;
293	PL_curpad = c->curpad;
294	PL_stack_base = c->stack_base;
295	PL_stack_max = c->stack_max;
296	PL_tmps_stack = c->tmps_stack;
297	PL_tmps_floor = c->tmps_floor;
298	PL_tmps_ix = c->tmps_ix;
299	PL_tmps_max = c->tmps_max;
300	PL_markstack = c->markstack;
301	PL_markstack_ptr = c->markstack_ptr;
302	PL_markstack_max = c->markstack_max;
303	PL_scopestack = c->scopestack;
304	PL_scopestack_ix = c->scopestack_ix;
305	PL_scopestack_max = c->scopestack_max;
306	PL_savestack = c->savestack;
307	PL_savestack_ix = c->savestack_ix;
308	PL_savestack_max = c->savestack_max;
309	PL_retstack = c->retstack;
310	PL_retstack_ix = c->retstack_ix;
311	PL_retstack_max = c->retstack_max;
312	PL_curcop = c->curcop;
313	PL_top_env = c->top_env;
314
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318
319	{
320	dSP;
321	CV *cv;
322
323	/* now do the ugly restore mess */
324	while ((cv = (CV *)POPs))
325	{
326	AV padlist = (AV )POPs;
327
328	if (padlist)
329	{
330	put_padlist (cv); /* mark this padlist as available */
331	CvPADLIST(cv) = padlist;
332	#ifdef USE_THREADS
333	/CvOWNER(cv) = (struct perl_thread )POPs;*/
334	#endif
335	}
336
337	++CvDEPTH(cv);
338	}
339
340	PUTBACK;
341	}
342	}
343
344	static void
345	save_state(pTHX_ Coro__State c, int flags)
346	{
347	{
348	dSP;
349	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;
351	PERL_SI *top_si = PL_curstackinfo;
352
353	/*
354	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(
356	*/
357
358	PUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */
360	for (;;)
361	{
362	while (cxix >= 0)
363	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];
365
366	if (CxTYPE(cx) == CXt_SUB)
367	{
368	CV *cv = cx->blk_sub.cv;
369	if (CvDEPTH(cv))
370	{
371	#ifdef USE_THREADS
372	/XPUSHs ((SV )CvOWNER(cv));*/
373	/CvOWNER(cv) = 0;/
374	/error must unlock this cv etc.. etc.../
375	#endif
376	EXTEND (SP, CvDEPTH(cv)*2);
377
378	while (--CvDEPTH(cv))
379	{
380	/* this tells the restore code to increment CvDEPTH */
381	PUSHs (Nullsv);
382	PUSHs ((SV *)cv);
383	}
384
385	PUSHs ((SV *)CvPADLIST(cv));
386	PUSHs ((SV *)cv);
387
388	get_padlist (cv); /* this is a monster */
389	}
390	}
391	else if (CxTYPE(cx) == CXt_FORMAT)
392	{
393	/* I never used formats, so how should I know how these are implemented? */
394	/* my bold guess is as a simple, plain sub... */
395	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396	}
397	}
398
399	if (top_si->si_type == PERLSI_MAIN)
400	break;
401
402	top_si = top_si->si_prev;
403	ccstk = top_si->si_cxstack;
404	cxix = top_si->si_cxix;
405	}
406
407	PUTBACK;
408	}
409
410	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
411	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
412	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
413
414	c->dowarn = PL_dowarn;
415	c->in_eval = PL_in_eval;
416
417	c->curstackinfo = PL_curstackinfo;
418	c->curstack = PL_curstack;
419	c->mainstack = PL_mainstack;
420	c->stack_sp = PL_stack_sp;
421	c->op = PL_op;
422	c->curpad = PL_curpad;
423	c->stack_base = PL_stack_base;
424	c->stack_max = PL_stack_max;
425	c->tmps_stack = PL_tmps_stack;
426	c->tmps_floor = PL_tmps_floor;
427	c->tmps_ix = PL_tmps_ix;
428	c->tmps_max = PL_tmps_max;
429	c->markstack = PL_markstack;
430	c->markstack_ptr = PL_markstack_ptr;
431	c->markstack_max = PL_markstack_max;
432	c->scopestack = PL_scopestack;
433	c->scopestack_ix = PL_scopestack_ix;
434	c->scopestack_max = PL_scopestack_max;
435	c->savestack = PL_savestack;
436	c->savestack_ix = PL_savestack_ix;
437	c->savestack_max = PL_savestack_max;
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	c->curcop = PL_curcop;
442	c->top_env = PL_top_env;
443	}
444
445	/*
446	* allocate various perl stacks. This is an exact copy
447	* of perl.c:init_stacks, except that it uses less memory
448	* on the assumption that coroutines do not usually need
449	* a lot of stackspace.
450	*/
451	STATIC void
452	coro_init_stacks (pTHX)
453	{
454	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
455	PL_curstackinfo->si_type = PERLSI_MAIN;
456	PL_curstack = PL_curstackinfo->si_stack;
457	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458
459	PL_stack_base = AvARRAY(PL_curstack);
460	PL_stack_sp = PL_stack_base;
461	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462
463	New(50,PL_tmps_stack,96,SV*);
464	PL_tmps_floor = -1;
465	PL_tmps_ix = -1;
466	PL_tmps_max = 96;
467
468	New(54,PL_markstack,16,I32);
469	PL_markstack_ptr = PL_markstack;
470	PL_markstack_max = PL_markstack + 16;
471
472	SET_MARK_OFFSET;
473
474	New(54,PL_scopestack,16,I32);
475	PL_scopestack_ix = 0;
476	PL_scopestack_max = 16;
477
478	New(54,PL_savestack,96,ANY);
479	PL_savestack_ix = 0;
480	PL_savestack_max = 96;
481
482	New(54,PL_retstack,8,OP*);
483	PL_retstack_ix = 0;
484	PL_retstack_max = 8;
485	}
486
487	/*
488	* destroy the stacks, the callchain etc...
489	* still there is a memleak of 128 bytes...
490	*/
491	STATIC void
492	destroy_stacks(pTHX)
493	{
494	if (!IN_DESTRUCT)
495	{
496	/* is this ugly, I ask? */
497	while (PL_scopestack_ix)
498	LEAVE;
499
500	/* sure it is, but more important: is it correct?? :/ */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;
503	}
504
505	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;
507
508	while (PL_curstackinfo)
509	{
510	PERL_SI *p = PL_curstackinfo->si_prev;
511
512	{
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)
519	{
520	dounwind(-1);
521	SvREFCNT_dec(PL_curstackinfo->si_stack);
522	}
523
524	Safefree(PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);
526	PL_curstackinfo = p;
527	}
528
529	Safefree(PL_tmps_stack);
530	Safefree(PL_markstack);
531	Safefree(PL_scopestack);
532	Safefree(PL_savestack);
533	Safefree(PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#ifdef HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif
553	{
554	/FIXME//D//* reasonable stack size! */
555	stack->ssize = -4096 * sizeof (long);
556	New (0, stack->sptr, 4096, long);
557	}
558	}
559	else
560	stack->sptr = 0;
561
562	ctx->stack = stack;
563	}
564
565	static void
566	deallocate_stack (Coro__State ctx)
567	{
568	coro_stack *stack = ctx->stack;
569
570	ctx->stack = 0;
571
572	if (stack)
573	{
574	if (!--stack->refcnt)
575	{
576	#ifdef HAVE_MMAP
577	if (stack->ssize > 0 && stack->sptr)
578	munmap (stack->sptr, stack->ssize);
579	else
580	#else
581	Safefree (stack->sptr);
582	#endif
583	Safefree (stack);
584	}
585	else if (ctx->gencnt == stack->gencnt)
586	--stack->usecnt;
587	}
588	}
589
590	static void
591	setup_coro (void *arg)
592	{
593	/*
594	* emulate part of the perl startup here.
595	*/
596	dSP;
597	Coro__State ctx = (Coro__State)arg;
598	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
599
600	coro_init_stacks (aTHX);
601	/PL_curcop = 0;/
602	/PL_in_eval = PL_in_eval;/ /* inherit */
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605
606	SPAGAIN;
607
608	if (ctx->stack)
609	{
610	ctx->cursp = 0;
611
612	PUSHMARK(SP);
613	PUTBACK;
614	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
615
616	if (SvTRUE (ERRSV))
617	croak (NULL);
618	else
619	croak ("FATAL: CCTXT coroutine returned!");
620	}
621	else
622	{
623	UNOP myop;
624
625	PL_op = (OP *)&myop;
626
627	Zero(&myop, 1, UNOP);
628	myop.op_next = Nullop;
629	myop.op_flags = OPf_WANT_VOID;
630
631	PUSHMARK(SP);
632	XPUSHs (sub_init);
633	/*
634	* the next line is slightly wrong, as PL_op->op_next
635	* is actually being executed so we skip the first op.
636	* that doesn't matter, though, since it is only
637	* pp_nextstate and we never return...
638	* ah yes, and I don't care anyways ;)
639	*/
640	PUTBACK;
641	PL_op = pp_entersub();
642	SPAGAIN;
643
644	ENTER; /* necessary e.g. for dounwind */
645	}
646	}
647
648	static void
649	continue_coro (void *arg)
650	{
651	/*
652	* this is a _very_ stripped down perl interpreter ;)
653	*/
654	Coro__State ctx = (Coro__State)arg;
655	JMPENV coro_start_env;
656
657	/* same as JMPENV_BOOTSTRAP */
658	Zero(&coro_start_env, 1, JMPENV);
659	coro_start_env.je_ret = -1;
660	coro_start_env.je_mustcatch = TRUE;
661	PL_top_env = &coro_start_env;
662
663	ctx->cursp = 0;
664	PL_op = PL_op->op_next;
665	CALLRUNOPS(aTHX);
666
667	abort ();
668	}
669
670	STATIC void
671	transfer(pTHX_ struct coro prev, struct coro next, int flags)
672	{
673	dSTACKLEVEL;
674	static struct coro *xnext;
675
676	if (prev != next)
677	{
678	xnext = next;
679
680	if (next->mainstack)
681	{
682	SAVE (prev, flags);
683	LOAD (next);
684
685	/* mark this state as in-use */
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	/* don't add any code here */
713	}
714
715	}
716	else if (next->tmps_ix == -2)
717	croak ("tried to transfer to running coroutine");
718	else
719	{
720	SAVE (prev, -1); /* first get rid of the old state */
721
722	if (flags & TRANSFER_SAVE_CCTXT)
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726
727	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728	{
729	setup_coro (next);
730
731	prev->stack->refcnt++;
732	prev->stack->usecnt++;
733	next->stack = prev->stack;
734	next->gencnt = prev->gencnt;
735	}
736	else
737	{
738	allocate_stack (next, 1);
739	coro_create (&(next->stack->cctx),
740	setup_coro, (void *)next,
741	next->stack->sptr, labs (next->stack->ssize));
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745	}
746	else
747	setup_coro (next);
748	}
749
750	/*
751	* xnext is now either prev or next, depending on wether
752	* we switched the c stack or not. that's why i use a global
753	* variable, that should become thread-specific at one point.
754	*/
755	xnext->cursp = stacklevel;
756	}
757	}
758
759	static struct coro *
760	sv_to_coro (SV arg, const char funcname, const char *varname)
761	{
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
763	{
764	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765
766	if (!he)
767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769	arg = HeVAL(he);
770	}
771
772	/* must also be changed inside Coro::Cont::yield */
773	if (SvROK(arg) && SvOBJECT(SvRV(arg))
774	&& SvSTASH(SvRV(arg)) == coro_state_stash)
775	return (struct coro ) SvIV((SV)SvRV(arg));
776
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
778	/NORETURN/
779	}
780
781	static void
782	api_transfer(pTHX_ SV prev, SV next, int flags)
783	{
784	transfer(aTHX_
785	sv_to_coro (prev, "Coro::transfer", "prev"),
786	sv_to_coro (next, "Coro::transfer", "next"),
787	flags);
788	}
789		246
790	/ Coro ******************************************************************/	247	/ Coro ******************************************************************/
791		248
792	#define PRIO_MAX 3	249	#define PRIO_MAX 3
793	#define PRIO_HIGH 1	250	#define PRIO_HIGH 1
795	#define PRIO_LOW -1	252	#define PRIO_LOW -1
796	#define PRIO_IDLE -3	253	#define PRIO_IDLE -3
797	#define PRIO_MIN -4	254	#define PRIO_MIN -4
798		255
799	/* for Coro.pm */	256	/* for Coro.pm */
800	static GV coro_current, coro_idle;	257	static SV *coro_current;
801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	258	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
802	static int coro_nready;	259	static int coro_nready;
		260	static struct coro *coro_first;
803		261
804	static void	262	/ lowlevel stuff ********************************************************/
805	coro_enq (SV *sv)	263
		264	static SV *
		265	coro_get_sv (const char *name, int create)
806	{	266	{
807	if (SvROK (sv))	267	#if PERL_VERSION_ATLEAST (5,9,0)
		268	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		269	get_sv (name, create);
		270	#endif
		271	return get_sv (name, create);
		272	}
		273
		274	static AV *
		275	coro_get_av (const char *name, int create)
		276	{
		277	#if PERL_VERSION_ATLEAST (5,9,0)
		278	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		279	get_av (name, create);
		280	#endif
		281	return get_av (name, create);
		282	}
		283
		284	static HV *
		285	coro_get_hv (const char *name, int create)
		286	{
		287	#if PERL_VERSION_ATLEAST (5,9,0)
		288	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		289	get_hv (name, create);
		290	#endif
		291	return get_hv (name, create);
		292	}
		293
		294	static AV *
		295	coro_clone_padlist (pTHX_ CV *cv)
		296	{
		297	AV *padlist = CvPADLIST (cv);
		298	AV newpadlist, newpad;
		299
		300	newpadlist = newAV ();
		301	AvREAL_off (newpadlist);
		302	#if PERL_VERSION_ATLEAST (5,9,0)
		303	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		304	#else
		305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		306	#endif
		307	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		308	--AvFILLp (padlist);
		309
		310	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		311	av_store (newpadlist, 1, (SV *)newpad);
		312
		313	return newpadlist;
		314	}
		315
		316	static void
		317	free_padlist (pTHX_ AV *padlist)
		318	{
		319	/* may be during global destruction */
		320	if (SvREFCNT (padlist))
808	{	321	{
809	SV *hv = SvRV (sv);	322	I32 i = AvFILLp (padlist);
810	if (SvTYPE (hv) == SVt_PVHV)	323	while (i >= 0)
811	{	324	{
812	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);	325	SV **svp = av_fetch (padlist, i--, FALSE);
813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;	326	if (svp)
		327	{
		328	SV *sv;
		329	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		330	SvREFCNT_dec (sv);
814		331
815	prio = prio > PRIO_MAX ? PRIO_MAX	332	SvREFCNT_dec (*svp);
816	: prio < PRIO_MIN ? PRIO_MIN	333	}
817	: prio;
818
819	av_push (coro_ready [prio - PRIO_MIN], sv);
820	coro_nready++;
821
822	return;
823	}	334	}
		335
		336	SvREFCNT_dec ((SV*)padlist);
		337	}
		338	}
		339
		340	static int
		341	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		342	{
		343	AV *padlist;
		344	AV av = (AV )mg->mg_obj;
		345
		346	/* casting is fun. */
		347	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		348	free_padlist (aTHX_ padlist);
		349
		350	SvREFCNT_dec (av);
		351
		352	return 0;
		353	}
		354
		355	#define PERL_MAGIC_coro PERL_MAGIC_ext
		356
		357	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		358
		359	#define CORO_MAGIC(cv) \
		360	SvMAGIC (cv) \
		361	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		362	? SvMAGIC (cv) \
		363	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		364	: 0
		365
		366	static struct coro *
		367	SvSTATE_ (pTHX_ SV *coro)
		368	{
		369	HV *stash;
		370	MAGIC *mg;
		371
		372	if (SvROK (coro))
		373	coro = SvRV (coro);
		374
		375	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		376	croak ("Coro::State object required");
		377
		378	stash = SvSTASH (coro);
		379	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		380	{
		381	/* very slow, but rare, check */
		382	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		383	croak ("Coro::State object required");
		384	}
		385
		386	mg = CORO_MAGIC (coro);
		387	return (struct coro *)mg->mg_ptr;
		388	}
		389
		390	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		391
		392	/* the next two functions merely cache the padlists */
		393	static void
		394	get_padlist (pTHX_ CV *cv)
		395	{
		396	MAGIC *mg = CORO_MAGIC (cv);
		397	AV *av;
		398
		399	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
		400	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		401	else
		402	{
		403	#if CORO_PREFER_PERL_FUNCTIONS
		404	/* this is probably cleaner, but also slower? */
		405	CV *cp = Perl_cv_clone (cv);
		406	CvPADLIST (cv) = CvPADLIST (cp);
		407	CvPADLIST (cp) = 0;
		408	SvREFCNT_dec (cp);
		409	#else
		410	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		411	#endif
824	}	412	}
		413	}
825		414
826	croak ("Coro::ready tried to enqueue something that is not a coroutine");	415	static void
		416	put_padlist (pTHX_ CV *cv)
		417	{
		418	MAGIC *mg = CORO_MAGIC (cv);
		419	AV *av;
		420
		421	if (expect_false (!mg))
		422	{
		423	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		424	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		425	mg->mg_virtual = &vtbl_coro;
		426	mg->mg_obj = (SV *)newAV ();
		427	}
		428
		429	av = (AV *)mg->mg_obj;
		430
		431	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		432	av_extend (av, AvMAX (av) + 1);
		433
		434	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		435	}
		436
		437	/ load & save, init *****************************************************/
		438
		439	static void
		440	load_perl (pTHX_ Coro__State c)
		441	{
		442	perl_slots *slot = c->slot;
		443	c->slot = 0;
		444
		445	PL_mainstack = c->mainstack;
		446
		447	GvSV (PL_defgv) = slot->defsv;
		448	GvAV (PL_defgv) = slot->defav;
		449	GvSV (PL_errgv) = slot->errsv;
		450	GvSV (irsgv) = slot->irsgv;
		451
		452	#define VAR(name,type) PL_ ## name = slot->name;
		453	# include "state.h"
		454	#undef VAR
		455
		456	/hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);/
		457	/hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);/
		458
		459	{
		460	dSP;
		461
		462	CV *cv;
		463
		464	/* now do the ugly restore mess */
		465	while (expect_true (cv = (CV *)POPs))
		466	{
		467	put_padlist (aTHX_ cv); /* mark this padlist as available */
		468	CvDEPTH (cv) = PTR2IV (POPs);
		469	CvPADLIST (cv) = (AV *)POPs;
		470	}
		471
		472	PUTBACK;
		473	}
		474	}
		475
		476	static void
		477	save_perl (pTHX_ Coro__State c)
		478	{
		479	{
		480	dSP;
		481	I32 cxix = cxstack_ix;
		482	PERL_CONTEXT *ccstk = cxstack;
		483	PERL_SI *top_si = PL_curstackinfo;
		484
		485	/*
		486	* the worst thing you can imagine happens first - we have to save
		487	* (and reinitialize) all cv's in the whole callchain :(
		488	*/
		489
		490	XPUSHs (Nullsv);
		491	/* this loop was inspired by pp_caller */
		492	for (;;)
		493	{
		494	while (expect_true (cxix >= 0))
		495	{
		496	PERL_CONTEXT *cx = &ccstk[cxix--];
		497
		498	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
		499	{
		500	CV *cv = cx->blk_sub.cv;
		501
		502	if (expect_true (CvDEPTH (cv)))
		503	{
		504	EXTEND (SP, 3);
		505	PUSHs ((SV *)CvPADLIST (cv));
		506	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
		507	PUSHs ((SV *)cv);
		508
		509	CvDEPTH (cv) = 0;
		510	get_padlist (aTHX_ cv);
		511	}
		512	}
		513	}
		514
		515	if (expect_true (top_si->si_type == PERLSI_MAIN))
		516	break;
		517
		518	top_si = top_si->si_prev;
		519	ccstk = top_si->si_cxstack;
		520	cxix = top_si->si_cxix;
		521	}
		522
		523	PUTBACK;
		524	}
		525
		526	/* allocate some space on the context stack for our purposes */
		527	/* we manually unroll here, as usually 2 slots is enough */
		528	if (SLOT_COUNT >= 1) CXINC;
		529	if (SLOT_COUNT >= 2) CXINC;
		530	if (SLOT_COUNT >= 3) CXINC;
		531	{
		532	int i;
		533	for (i = 3; i < SLOT_COUNT; ++i)
		534	CXINC;
		535	}
		536	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		537
		538	c->mainstack = PL_mainstack;
		539
		540	{
		541	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		542
		543	slot->defav = GvAV (PL_defgv);
		544	slot->defsv = DEFSV;
		545	slot->errsv = ERRSV;
		546	slot->irsgv = GvSV (irsgv);
		547
		548	#define VAR(name,type) slot->name = PL_ ## name;
		549	# include "state.h"
		550	#undef VAR
		551	}
		552	}
		553
		554	/*
		555	* allocate various perl stacks. This is an exact copy
		556	* of perl.c:init_stacks, except that it uses less memory
		557	* on the (sometimes correct) assumption that coroutines do
		558	* not usually need a lot of stackspace.
		559	*/
		560	#if CORO_PREFER_PERL_FUNCTIONS
		561	# define coro_init_stacks init_stacks
		562	#else
		563	static void
		564	coro_init_stacks (pTHX)
		565	{
		566	PL_curstackinfo = new_stackinfo(32, 8);
		567	PL_curstackinfo->si_type = PERLSI_MAIN;
		568	PL_curstack = PL_curstackinfo->si_stack;
		569	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		570
		571	PL_stack_base = AvARRAY(PL_curstack);
		572	PL_stack_sp = PL_stack_base;
		573	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		574
		575	New(50,PL_tmps_stack,32,SV*);
		576	PL_tmps_floor = -1;
		577	PL_tmps_ix = -1;
		578	PL_tmps_max = 32;
		579
		580	New(54,PL_markstack,16,I32);
		581	PL_markstack_ptr = PL_markstack;
		582	PL_markstack_max = PL_markstack + 16;
		583
		584	#ifdef SET_MARK_OFFSET
		585	SET_MARK_OFFSET;
		586	#endif
		587
		588	New(54,PL_scopestack,8,I32);
		589	PL_scopestack_ix = 0;
		590	PL_scopestack_max = 8;
		591
		592	New(54,PL_savestack,24,ANY);
		593	PL_savestack_ix = 0;
		594	PL_savestack_max = 24;
		595
		596	#if !PERL_VERSION_ATLEAST (5,9,0)
		597	New(54,PL_retstack,4,OP*);
		598	PL_retstack_ix = 0;
		599	PL_retstack_max = 4;
		600	#endif
		601	}
		602	#endif
		603
		604	/*
		605	* destroy the stacks, the callchain etc...
		606	*/
		607	static void
		608	coro_destroy_stacks (pTHX)
		609	{
		610	while (PL_curstackinfo->si_next)
		611	PL_curstackinfo = PL_curstackinfo->si_next;
		612
		613	while (PL_curstackinfo)
		614	{
		615	PERL_SI *p = PL_curstackinfo->si_prev;
		616
		617	if (!IN_DESTRUCT)
		618	SvREFCNT_dec (PL_curstackinfo->si_stack);
		619
		620	Safefree (PL_curstackinfo->si_cxstack);
		621	Safefree (PL_curstackinfo);
		622	PL_curstackinfo = p;
		623	}
		624
		625	Safefree (PL_tmps_stack);
		626	Safefree (PL_markstack);
		627	Safefree (PL_scopestack);
		628	Safefree (PL_savestack);
		629	#if !PERL_VERSION_ATLEAST (5,9,0)
		630	Safefree (PL_retstack);
		631	#endif
		632	}
		633
		634	static size_t
		635	coro_rss (pTHX_ struct coro *coro)
		636	{
		637	size_t rss = sizeof (*coro);
		638
		639	if (coro->mainstack)
		640	{
		641	perl_slots tmp_slot;
		642	perl_slots *slot;
		643
		644	if (coro->flags & CF_RUNNING)
		645	{
		646	slot = &tmp_slot;
		647
		648	#define VAR(name,type) slot->name = PL_ ## name;
		649	# include "state.h"
		650	#undef VAR
		651	}
		652	else
		653	slot = coro->slot;
		654
		655	rss += sizeof (slot->curstackinfo);
		656	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		657	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		658	rss += slot->tmps_max * sizeof (SV *);
		659	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		660	rss += slot->scopestack_max * sizeof (I32);
		661	rss += slot->savestack_max * sizeof (ANY);
		662
		663	#if !PERL_VERSION_ATLEAST (5,9,0)
		664	rss += slot->retstack_max * sizeof (OP *);
		665	#endif
		666	}
		667
		668	return rss;
		669	}
		670
		671	/ coroutine stack handling **********************************************/
		672
		673	static void
		674	coro_setup (pTHX_ struct coro *coro)
		675	{
		676	/*
		677	* emulate part of the perl startup here.
		678	*/
		679	coro_init_stacks (aTHX);
		680
		681	PL_runops = RUNOPS_DEFAULT;
		682	PL_curcop = &PL_compiling;
		683	PL_in_eval = EVAL_NULL;
		684	PL_comppad = 0;
		685	PL_curpm = 0;
		686	PL_curpad = 0;
		687	PL_localizing = 0;
		688	PL_dirty = 0;
		689	PL_restartop = 0;
		690	PL_diehook = 0; hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);
		691	PL_warnhook = 0; hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);
		692
		693	GvSV (PL_defgv) = newSV (0);
		694	GvAV (PL_defgv) = coro->args; coro->args = 0;
		695	GvSV (PL_errgv) = newSV (0);
		696	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		697	PL_rs = newSVsv (GvSV (irsgv));
		698	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		699
		700	{
		701	dSP;
		702	LOGOP myop;
		703
		704	Zero (&myop, 1, LOGOP);
		705	myop.op_next = Nullop;
		706	myop.op_flags = OPf_WANT_VOID;
		707
		708	PUSHMARK (SP);
		709	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		710	PUTBACK;
		711	PL_op = (OP *)&myop;
		712	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		713	SPAGAIN;
		714	}
		715
		716	/* this newly created coroutine might be run on an existing cctx which most
		717	* likely was suspended in set_stacklevel, called from entersub.
		718	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		719	* so we ENTER here for symmetry
		720	*/
		721	ENTER;
		722	}
		723
		724	static void
		725	coro_destroy (pTHX_ struct coro *coro)
		726	{
		727	if (!IN_DESTRUCT)
		728	{
		729	/* restore all saved variables and stuff */
		730	LEAVE_SCOPE (0);
		731	assert (PL_tmps_floor == -1);
		732
		733	/* free all temporaries */
		734	FREETMPS;
		735	assert (PL_tmps_ix == -1);
		736
		737	/* unwind all extra stacks */
		738	POPSTACK_TO (PL_mainstack);
		739
		740	/* unwind main stack */
		741	dounwind (-1);
		742	}
		743
		744	SvREFCNT_dec (GvSV (PL_defgv));
		745	SvREFCNT_dec (GvAV (PL_defgv));
		746	SvREFCNT_dec (GvSV (PL_errgv));
		747	SvREFCNT_dec (PL_defoutgv);
		748	SvREFCNT_dec (PL_rs);
		749	SvREFCNT_dec (GvSV (irsgv));
		750
		751	SvREFCNT_dec (PL_diehook);
		752	SvREFCNT_dec (PL_warnhook);
		753
		754	SvREFCNT_dec (coro->saved_deffh);
		755	SvREFCNT_dec (coro->throw);
		756
		757	coro_destroy_stacks (aTHX);
		758	}
		759
		760	static void
		761	free_coro_mortal (pTHX)
		762	{
		763	if (expect_true (coro_mortal))
		764	{
		765	SvREFCNT_dec (coro_mortal);
		766	coro_mortal = 0;
		767	}
		768	}
		769
		770	static int
		771	runops_trace (pTHX)
		772	{
		773	COP *oldcop = 0;
		774	int oldcxix = -2;
		775	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		776	coro_cctx *cctx = coro->cctx;
		777
		778	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		779	{
		780	PERL_ASYNC_CHECK ();
		781
		782	if (cctx->flags & CC_TRACE_ALL)
		783	{
		784	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		785	{
		786	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		787	SV bot, top;
		788	AV av = newAV (); / return values */
		789	SV **cb;
		790	dSP;
		791
		792	GV *gv = CvGV (cx->blk_sub.cv);
		793	SV *fullname = sv_2mortal (newSV (0));
		794	if (isGV (gv))
		795	gv_efullname3 (fullname, gv, 0);
		796
		797	bot = PL_stack_base + cx->blk_oldsp + 1;
		798	top = cx->blk_gimme == G_ARRAY ? SP + 1
		799	: cx->blk_gimme == G_SCALAR ? bot + 1
		800	: bot;
		801
		802	av_extend (av, top - bot);
		803	while (bot < top)
		804	av_push (av, SvREFCNT_inc (*bot++));
		805
		806	PL_runops = RUNOPS_DEFAULT;
		807	ENTER;
		808	SAVETMPS;
		809	EXTEND (SP, 3);
		810	PUSHMARK (SP);
		811	PUSHs (&PL_sv_no);
		812	PUSHs (fullname);
		813	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		814	PUTBACK;
		815	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		816	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		817	SPAGAIN;
		818	FREETMPS;
		819	LEAVE;
		820	PL_runops = runops_trace;
		821	}
		822
		823	if (oldcop != PL_curcop)
		824	{
		825	oldcop = PL_curcop;
		826
		827	if (PL_curcop != &PL_compiling)
		828	{
		829	SV **cb;
		830
		831	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		832	{
		833	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		834
		835	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		836	{
		837	runops_proc_t old_runops = PL_runops;
		838	dSP;
		839	GV *gv = CvGV (cx->blk_sub.cv);
		840	SV *fullname = sv_2mortal (newSV (0));
		841
		842	if (isGV (gv))
		843	gv_efullname3 (fullname, gv, 0);
		844
		845	PL_runops = RUNOPS_DEFAULT;
		846	ENTER;
		847	SAVETMPS;
		848	EXTEND (SP, 3);
		849	PUSHMARK (SP);
		850	PUSHs (&PL_sv_yes);
		851	PUSHs (fullname);
		852	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		853	PUTBACK;
		854	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		855	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		856	SPAGAIN;
		857	FREETMPS;
		858	LEAVE;
		859	PL_runops = runops_trace;
		860	}
		861
		862	oldcxix = cxstack_ix;
		863	}
		864
		865	if (cctx->flags & CC_TRACE_LINE)
		866	{
		867	dSP;
		868
		869	PL_runops = RUNOPS_DEFAULT;
		870	ENTER;
		871	SAVETMPS;
		872	EXTEND (SP, 3);
		873	PL_runops = RUNOPS_DEFAULT;
		874	PUSHMARK (SP);
		875	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		876	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		877	PUTBACK;
		878	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		879	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		880	SPAGAIN;
		881	FREETMPS;
		882	LEAVE;
		883	PL_runops = runops_trace;
		884	}
		885	}
		886	}
		887	}
		888	}
		889
		890	TAINT_NOT;
		891	return 0;
		892	}
		893
		894	/* inject a fake call to Coro::State::_cctx_init into the execution */
		895	/* _cctx_init should be careful, as it could be called at almost any time */
		896	/* during execution of a perl program */
		897	static void NOINLINE
		898	cctx_prepare (pTHX_ coro_cctx *cctx)
		899	{
		900	dSP;
		901	LOGOP myop;
		902
		903	PL_top_env = &PL_start_env;
		904
		905	if (cctx->flags & CC_TRACE)
		906	PL_runops = runops_trace;
		907
		908	Zero (&myop, 1, LOGOP);
		909	myop.op_next = PL_op;
		910	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		911
		912	PUSHMARK (SP);
		913	EXTEND (SP, 2);
		914	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		915	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		916	PUTBACK;
		917	PL_op = (OP *)&myop;
		918	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		919	SPAGAIN;
		920	}
		921
		922	/*
		923	* this is a _very_ stripped down perl interpreter ;)
		924	*/
		925	static void
		926	cctx_run (void *arg)
		927	{
		928	dTHX;
		929
		930	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		931	UNLOCK;
		932
		933	/* we now skip the entersub that lead to transfer() */
		934	PL_op = PL_op->op_next;
		935
		936	/* inject a fake subroutine call to cctx_init */
		937	cctx_prepare (aTHX_ (coro_cctx *)arg);
		938
		939	/* somebody or something will hit me for both perl_run and PL_restartop */
		940	PL_restartop = PL_op;
		941	perl_run (PL_curinterp);
		942
		943	/*
		944	* If perl-run returns we assume exit() was being called or the coro
		945	* fell off the end, which seems to be the only valid (non-bug)
		946	* reason for perl_run to return. We try to exit by jumping to the
		947	* bootstrap-time "top" top_env, as we cannot restore the "main"
		948	* coroutine as Coro has no such concept
		949	*/
		950	PL_top_env = main_top_env;
		951	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		952	}
		953
		954	static coro_cctx *
		955	cctx_new ()
		956	{
		957	coro_cctx *cctx;
		958	void *stack_start;
		959	size_t stack_size;
		960
		961	++cctx_count;
		962
		963	Newz (0, cctx, 1, coro_cctx);
		964
		965	#if HAVE_MMAP
		966	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		967	/* mmap supposedly does allocate-on-write for us */
		968	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		969
		970	if (cctx->sptr != (void *)-1)
		971	{
		972	# if CORO_STACKGUARD
		973	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		974	# endif
		975	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		976	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		977	cctx->flags \|= CC_MAPPED;
		978	}
		979	else
		980	#endif
		981	{
		982	cctx->ssize = coro_stacksize * (long)sizeof (long);
		983	New (0, cctx->sptr, coro_stacksize, long);
		984
		985	if (!cctx->sptr)
		986	{
		987	perror ("FATAL: unable to allocate stack for coroutine");
		988	_exit (EXIT_FAILURE);
		989	}
		990
		991	stack_start = cctx->sptr;
		992	stack_size = cctx->ssize;
		993	}
		994
		995	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		996	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		997
		998	return cctx;
		999	}
		1000
		1001	static void
		1002	cctx_destroy (coro_cctx *cctx)
		1003	{
		1004	if (!cctx)
		1005	return;
		1006
		1007	--cctx_count;
		1008
		1009	#if CORO_USE_VALGRIND
		1010	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1011	#endif
		1012
		1013	#if HAVE_MMAP
		1014	if (cctx->flags & CC_MAPPED)
		1015	munmap (cctx->sptr, cctx->ssize);
		1016	else
		1017	#endif
		1018	Safefree (cctx->sptr);
		1019
		1020	Safefree (cctx);
		1021	}
		1022
		1023	/* wether this cctx should be destructed */
		1024	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1025
		1026	static coro_cctx *
		1027	cctx_get (pTHX)
		1028	{
		1029	while (expect_true (cctx_first))
		1030	{
		1031	coro_cctx *cctx = cctx_first;
		1032	cctx_first = cctx->next;
		1033	--cctx_idle;
		1034
		1035	if (expect_true (!CCTX_EXPIRED (cctx)))
		1036	return cctx;
		1037
		1038	cctx_destroy (cctx);
		1039	}
		1040
		1041	return cctx_new ();
		1042	}
		1043
		1044	static void
		1045	cctx_put (coro_cctx *cctx)
		1046	{
		1047	/* free another cctx if overlimit */
		1048	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1049	{
		1050	coro_cctx *first = cctx_first;
		1051	cctx_first = first->next;
		1052	--cctx_idle;
		1053
		1054	cctx_destroy (first);
		1055	}
		1056
		1057	++cctx_idle;
		1058	cctx->next = cctx_first;
		1059	cctx_first = cctx;
		1060	}
		1061
		1062	/ coroutine switching ***************************************************/
		1063
		1064	static void
		1065	transfer_check (pTHX_ struct coro prev, struct coro next)
		1066	{
		1067	if (expect_true (prev != next))
		1068	{
		1069	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1070	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1071
		1072	if (expect_false (next->flags & CF_RUNNING))
		1073	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1074
		1075	if (expect_false (next->flags & CF_DESTROYED))
		1076	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1077
		1078	if (
		1079	#if PERL_VERSION_ATLEAST (5,9,0)
		1080	expect_false (PL_parser)
		1081	#else
		1082	expect_false (PL_lex_state != LEX_NOTPARSING)
		1083	#endif
		1084	)
		1085	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1086	}
		1087	}
		1088
		1089	/* always use the TRANSFER macro */
		1090	static void NOINLINE
		1091	transfer (pTHX_ struct coro prev, struct coro next)
		1092	{
		1093	dSTACKLEVEL;
		1094
		1095	/* sometimes transfer is only called to set idle_sp */
		1096	if (expect_false (!next))
		1097	{
		1098	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1099	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1100	}
		1101	else if (expect_true (prev != next))
		1102	{
		1103	coro_cctx *prev__cctx;
		1104
		1105	if (expect_false (prev->flags & CF_NEW))
		1106	{
		1107	/* create a new empty context */
		1108	Newz (0, prev->cctx, 1, coro_cctx);
		1109	prev->flags &= ~CF_NEW;
		1110	prev->flags \|= CF_RUNNING;
		1111	}
		1112
		1113	prev->flags &= ~CF_RUNNING;
		1114	next->flags \|= CF_RUNNING;
		1115
		1116	LOCK;
		1117
		1118	if (expect_false (next->flags & CF_NEW))
		1119	{
		1120	/* need to start coroutine */
		1121	next->flags &= ~CF_NEW;
		1122	/* first get rid of the old state */
		1123	save_perl (aTHX_ prev);
		1124	/* setup coroutine call */
		1125	coro_setup (aTHX_ next);
		1126	}
		1127	else
		1128	{
		1129	/* coroutine already started */
		1130	save_perl (aTHX_ prev);
		1131	load_perl (aTHX_ next);
		1132	}
		1133
		1134	prev__cctx = prev->cctx;
		1135
		1136	/* possibly "free" the cctx */
		1137	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1138	{
		1139	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1140	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1141
		1142	prev->cctx = 0;
		1143
		1144	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1145	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1146	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1147	if (!next->cctx)
		1148	next->cctx = cctx_get (aTHX);
		1149
		1150	cctx_put (prev__cctx);
		1151	}
		1152
		1153	++next->usecount;
		1154
		1155	if (expect_true (!next->cctx))
		1156	next->cctx = cctx_get (aTHX);
		1157
		1158	if (expect_false (prev__cctx != next->cctx))
		1159	{
		1160	prev__cctx->top_env = PL_top_env;
		1161	PL_top_env = next->cctx->top_env;
		1162	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1163	}
		1164
		1165	free_coro_mortal (aTHX);
		1166	UNLOCK;
		1167
		1168	if (expect_false (prev->throw \|\| next->throw))
		1169	{
		1170	struct coro *coro = SvSTATE (coro_current);
		1171
		1172	if (coro->throw)
		1173	{
		1174	SV *exception = coro->throw;
		1175	coro->throw = 0;
		1176	sv_setsv (ERRSV, exception);
		1177	croak (0);
		1178	}
		1179	}
		1180	}
		1181	}
		1182
		1183	struct transfer_args
		1184	{
		1185	struct coro prev, next;
		1186	};
		1187
		1188	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1189	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1190
		1191	/ high level stuff ******************************************************/
		1192
		1193	static int
		1194	coro_state_destroy (pTHX_ struct coro *coro)
		1195	{
		1196	if (coro->flags & CF_DESTROYED)
		1197	return 0;
		1198
		1199	coro->flags \|= CF_DESTROYED;
		1200
		1201	if (coro->flags & CF_READY)
		1202	{
		1203	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1204	/* alternative: look through all ready queues and remove the coro */
		1205	LOCK;
		1206	--coro_nready;
		1207	UNLOCK;
		1208	}
		1209	else
		1210	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1211
		1212	if (coro->mainstack && coro->mainstack != main_mainstack)
		1213	{
		1214	struct coro temp;
		1215
		1216	if (coro->flags & CF_RUNNING)
		1217	croak ("FATAL: tried to destroy currently running coroutine");
		1218
		1219	save_perl (aTHX_ &temp);
		1220	load_perl (aTHX_ coro);
		1221
		1222	coro_destroy (aTHX_ coro);
		1223
		1224	load_perl (aTHX_ &temp);
		1225
		1226	coro->slot = 0;
		1227	}
		1228
		1229	cctx_destroy (coro->cctx);
		1230	SvREFCNT_dec (coro->args);
		1231
		1232	if (coro->next) coro->next->prev = coro->prev;
		1233	if (coro->prev) coro->prev->next = coro->next;
		1234	if (coro == coro_first) coro_first = coro->next;
		1235
		1236	return 1;
		1237	}
		1238
		1239	static int
		1240	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1241	{
		1242	struct coro coro = (struct coro )mg->mg_ptr;
		1243	mg->mg_ptr = 0;
		1244
		1245	coro->hv = 0;
		1246
		1247	if (--coro->refcnt < 0)
		1248	{
		1249	coro_state_destroy (aTHX_ coro);
		1250	Safefree (coro);
		1251	}
		1252
		1253	return 0;
		1254	}
		1255
		1256	static int
		1257	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1258	{
		1259	struct coro coro = (struct coro )mg->mg_ptr;
		1260
		1261	++coro->refcnt;
		1262
		1263	return 0;
		1264	}
		1265
		1266	static MGVTBL coro_state_vtbl = {
		1267	0, 0, 0, 0,
		1268	coro_state_free,
		1269	0,
		1270	#ifdef MGf_DUP
		1271	coro_state_dup,
		1272	#else
		1273	# define MGf_DUP 0
		1274	#endif
		1275	};
		1276
		1277	static void
		1278	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1279	{
		1280	ta->prev = SvSTATE (prev_sv);
		1281	ta->next = SvSTATE (next_sv);
		1282	TRANSFER_CHECK (*ta);
		1283	}
		1284
		1285	static void
		1286	api_transfer (SV prev_sv, SV next_sv)
		1287	{
		1288	dTHX;
		1289	struct transfer_args ta;
		1290
		1291	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1292	TRANSFER (ta);
		1293	}
		1294
		1295	/ Coro ******************************************************************/
		1296
		1297	static void
		1298	coro_enq (pTHX_ SV *coro_sv)
		1299	{
		1300	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
827	}	1301	}
828		1302
829	static SV *	1303	static SV *
830	coro_deq (int min_prio)	1304	coro_deq (pTHX_ int min_prio)
831	{	1305	{
832	int prio = PRIO_MAX - PRIO_MIN;	1306	int prio = PRIO_MAX - PRIO_MIN;
833		1307
834	min_prio -= PRIO_MIN;	1308	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	1309	if (min_prio < 0)
836	min_prio = 0;	1310	min_prio = 0;
837		1311
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1312	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	1313	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready[prio]);	1314	return av_shift (coro_ready [prio]);
843	}
844		1315
845	return 0;	1316	return 0;
846	}	1317	}
847		1318
848	static void	1319	static int
849	api_ready (SV *coro)	1320	api_ready (SV *coro_sv)
850	{	1321	{
		1322	dTHX;
		1323	struct coro *coro;
		1324
		1325	if (SvROK (coro_sv))
		1326	coro_sv = SvRV (coro_sv);
		1327
		1328	coro = SvSTATE (coro_sv);
		1329
		1330	if (coro->flags & CF_READY)
		1331	return 0;
		1332
		1333	coro->flags \|= CF_READY;
		1334
		1335	LOCK;
851	coro_enq (SvREFCNT_inc (coro));	1336	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
852	}	1337	++coro_nready;
		1338	UNLOCK;
853		1339
		1340	return 1;
		1341	}
		1342
854	static void	1343	static int
855	api_schedule (int cede)	1344	api_is_ready (SV *coro_sv)
856	{	1345	{
		1346	dTHX;
		1347	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1348	}
		1349
		1350	static void
		1351	prepare_schedule (pTHX_ struct transfer_args *ta)
		1352	{
857	SV prev, next;	1353	SV prev_sv, next_sv;
858		1354
		1355	for (;;)
		1356	{
		1357	LOCK;
		1358	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1359
		1360	/* nothing to schedule: call the idle handler */
		1361	if (expect_false (!next_sv))
		1362	{
		1363	dSP;
		1364	UNLOCK;
		1365
		1366	ENTER;
		1367	SAVETMPS;
		1368
		1369	PUSHMARK (SP);
		1370	PUTBACK;
		1371	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1372
		1373	FREETMPS;
		1374	LEAVE;
		1375	continue;
		1376	}
		1377
		1378	ta->next = SvSTATE (next_sv);
		1379
		1380	/* cannot transfer to destroyed coros, skip and look for next */
		1381	if (expect_false (ta->next->flags & CF_DESTROYED))
		1382	{
		1383	UNLOCK;
		1384	SvREFCNT_dec (next_sv);
		1385	/* coro_nready is already taken care of by destroy */
		1386	continue;
		1387	}
		1388
		1389	--coro_nready;
		1390	UNLOCK;
		1391	break;
		1392	}
		1393
		1394	/* free this only after the transfer */
859	prev = GvSV (coro_current);	1395	prev_sv = SvRV (coro_current);
		1396	ta->prev = SvSTATE (prev_sv);
		1397	TRANSFER_CHECK (*ta);
		1398	assert (ta->next->flags & CF_READY);
		1399	ta->next->flags &= ~CF_READY;
		1400	SvRV_set (coro_current, next_sv);
860		1401
861	if (cede)	1402	LOCK;
862	coro_enq (SvREFCNT_inc (prev));	1403	free_coro_mortal (aTHX);
863		1404	coro_mortal = prev_sv;
864	next = coro_deq (PRIO_MIN);	1405	UNLOCK;
865
866	if (!next)
867	next = SvREFCNT_inc (GvSV (coro_idle));
868
869	GvSV (coro_current) = SvREFCNT_inc (next);
870	transfer (aTHX_
871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
872	sv_to_coro (next, "Coro::schedule", "next coroutine"),
873	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
874	SvREFCNT_dec (next);
875	SvREFCNT_dec (prev);
876	}	1406	}
877		1407
		1408	static void
		1409	prepare_cede (pTHX_ struct transfer_args *ta)
		1410	{
		1411	api_ready (coro_current);
		1412	prepare_schedule (aTHX_ ta);
		1413	}
		1414
		1415	static int
		1416	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1417	{
		1418	if (coro_nready)
		1419	{
		1420	SV *prev = SvRV (coro_current);
		1421	prepare_schedule (aTHX_ ta);
		1422	api_ready (prev);
		1423	return 1;
		1424	}
		1425	else
		1426	return 0;
		1427	}
		1428
		1429	static void
		1430	api_schedule (void)
		1431	{
		1432	dTHX;
		1433	struct transfer_args ta;
		1434
		1435	prepare_schedule (aTHX_ &ta);
		1436	TRANSFER (ta);
		1437	}
		1438
		1439	static int
		1440	api_cede (void)
		1441	{
		1442	dTHX;
		1443	struct transfer_args ta;
		1444
		1445	prepare_cede (aTHX_ &ta);
		1446
		1447	if (expect_true (ta.prev != ta.next))
		1448	{
		1449	TRANSFER (ta);
		1450	return 1;
		1451	}
		1452	else
		1453	return 0;
		1454	}
		1455
		1456	static int
		1457	api_cede_notself (void)
		1458	{
		1459	dTHX;
		1460	struct transfer_args ta;
		1461
		1462	if (prepare_cede_notself (aTHX_ &ta))
		1463	{
		1464	TRANSFER (ta);
		1465	return 1;
		1466	}
		1467	else
		1468	return 0;
		1469	}
		1470
		1471	static void
		1472	api_trace (SV *coro_sv, int flags)
		1473	{
		1474	dTHX;
		1475	struct coro *coro = SvSTATE (coro_sv);
		1476
		1477	if (flags & CC_TRACE)
		1478	{
		1479	if (!coro->cctx)
		1480	coro->cctx = cctx_new ();
		1481	else if (!(coro->cctx->flags & CC_TRACE))
		1482	croak ("cannot enable tracing on coroutine with custom stack");
		1483
		1484	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1485	}
		1486	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1487	{
		1488	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1489
		1490	if (coro->flags & CF_RUNNING)
		1491	PL_runops = RUNOPS_DEFAULT;
		1492	else
		1493	coro->slot->runops = RUNOPS_DEFAULT;
		1494	}
		1495	}
		1496
878	MODULE = Coro::State PACKAGE = Coro::State	1497	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879		1498
880	PROTOTYPES: ENABLE	1499	PROTOTYPES: DISABLE
881		1500
882	BOOT:	1501	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	1502	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1503	#ifdef USE_ITHREADS
885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1504	MUTEX_INIT (&coro_mutex);
		1505	#endif
		1506	BOOT_PAGESIZE;
		1507
		1508	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1509	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1510
		1511	hv_sig = coro_get_hv ("SIG", TRUE);
		1512	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1513	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1514
		1515	if (!PL_diehook ) hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);
		1516	if (!PL_warnhook) hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);
		1517
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1518	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		1519
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1521	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1522	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1523	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893	if (!padlist_cache)
894	padlist_cache = newHV ();
895		1524
896	main_mainstack = PL_mainstack;	1525	main_mainstack = PL_mainstack;
		1526	main_top_env = PL_top_env;
		1527
		1528	while (main_top_env->je_prev)
		1529	main_top_env = main_top_env->je_prev;
897		1530
898	coroapi.ver = CORO_API_VERSION;	1531	coroapi.ver = CORO_API_VERSION;
		1532	coroapi.rev = CORO_API_REVISION;
899	coroapi.transfer = api_transfer;	1533	coroapi.transfer = api_transfer;
900	}
901		1534
902	Coro::State	1535	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	1536	}
904	SV * args	1537
905	PROTOTYPE: $	1538	SV *
		1539	new (char *klass, ...)
906	CODE:	1540	CODE:
907	Coro__State coro;	1541	{
		1542	struct coro *coro;
		1543	HV *hv;
		1544	int i;
908		1545
909	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
910	croak ("Coro::State::_newprocess expects an arrayref");
911
912	New (0, coro, 1, struct coro);	1546	Newz (0, coro, 1, struct coro);
		1547	coro->args = newAV ();
		1548	coro->flags = CF_NEW;
913		1549
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1550	if (coro_first) coro_first->prev = coro;
915	coro->mainstack = 0; /* actual work is done inside transfer */	1551	coro->next = coro_first;
916	coro->stack = 0;	1552	coro_first = coro;
917		1553
918	RETVAL = coro;	1554	coro->hv = hv = newHV ();
		1555	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1556	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1557
		1558	av_extend (coro->args, items - 1);
		1559	for (i = 1; i < items; i++)
		1560	av_push (coro->args, newSVsv (ST (i)));
		1561	}
919	OUTPUT:	1562	OUTPUT:
920	RETVAL	1563	RETVAL
921		1564
		1565	# these not obviously related functions are all rolled into the same xs
		1566	# function to increase chances that they all will call transfer with the same
		1567	# stack offset
922	void	1568	void
923	transfer(prev, next, flags)	1569	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1570	ALIAS:
925	Coro::State_or_hashref next	1571	Coro::State::transfer = 1
926	int flags	1572	Coro::schedule = 2
927	PROTOTYPE: @	1573	Coro::cede = 3
		1574	Coro::cede_notself = 4
928	CODE:	1575	CODE:
		1576	{
		1577	struct transfer_args ta;
		1578
		1579	switch (ix)
		1580	{
		1581	case 0:
		1582	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1583	ta.next = 0;
		1584	break;
		1585
		1586	case 1:
		1587	if (items != 2)
		1588	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1589
		1590	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1591	break;
		1592
		1593	case 2:
		1594	prepare_schedule (aTHX_ &ta);
		1595	break;
		1596
		1597	case 3:
		1598	prepare_cede (aTHX_ &ta);
		1599	break;
		1600
		1601	case 4:
		1602	if (!prepare_cede_notself (aTHX_ &ta))
		1603	XSRETURN_EMPTY;
		1604
		1605	break;
		1606	}
		1607
		1608	BARRIER;
929	PUTBACK;	1609	PUTBACK;
930	transfer (aTHX_ prev, next, flags);	1610	TRANSFER (ta);
931	SPAGAIN;	1611	SPAGAIN; /* might be the sp of a different coroutine now */
		1612	/* be extra careful not to ever do anything after TRANSFER */
		1613	}
		1614
		1615	bool
		1616	_destroy (SV *coro_sv)
		1617	CODE:
		1618	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1619	OUTPUT:
		1620	RETVAL
932		1621
933	void	1622	void
934	DESTROY(coro)
935	Coro::State coro
936	CODE:
937
938	if (coro->mainstack && coro->mainstack != main_mainstack)
939	{
940	struct coro temp;
941
942	PUTBACK;
943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944	LOAD(aTHX_ coro);
945	SPAGAIN;
946
947	destroy_stacks (aTHX);
948
949	LOAD((&temp)); /* this will get rid of defsv etc.. */
950	SPAGAIN;
951
952	coro->mainstack = 0;
953	}
954
955	deallocate_stack (coro);
956
957	Safefree (coro);
958
959	void
960	flush()
961	CODE:
962	#ifdef MAY_FLUSH
963	flush_padlist_cache ();
964	#endif
965
966	void
967	_exit(code)	1623	_exit (code)
968	int code	1624	int code
969	PROTOTYPE: $	1625	PROTOTYPE: $
970	CODE:	1626	CODE:
971	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
972	_exit (code);	1627	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978		1628
979	MODULE = Coro::State PACKAGE = Coro::Cont	1629	int
		1630	cctx_stacksize (int new_stacksize = 0)
		1631	CODE:
		1632	RETVAL = coro_stacksize;
		1633	if (new_stacksize)
		1634	coro_stacksize = new_stacksize;
		1635	OUTPUT:
		1636	RETVAL
980		1637
981	# this is slightly dirty (should expose a c-level api)	1638	int
		1639	cctx_count ()
		1640	CODE:
		1641	RETVAL = cctx_count;
		1642	OUTPUT:
		1643	RETVAL
		1644
		1645	int
		1646	cctx_idle ()
		1647	CODE:
		1648	RETVAL = cctx_idle;
		1649	OUTPUT:
		1650	RETVAL
982		1651
983	void	1652	void
984	yield(...)	1653	list ()
985	PROTOTYPE: @	1654	PPCODE:
		1655	{
		1656	struct coro *coro;
		1657	for (coro = coro_first; coro; coro = coro->next)
		1658	if (coro->hv)
		1659	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1660	}
		1661
		1662	void
		1663	call (Coro::State coro, SV *coderef)
		1664	ALIAS:
		1665	eval = 1
		1666	CODE:
		1667	{
		1668	if (coro->mainstack)
		1669	{
		1670	struct coro temp;
		1671
		1672	if (!(coro->flags & CF_RUNNING))
		1673	{
		1674	save_perl (aTHX_ &temp);
		1675	load_perl (aTHX_ coro);
		1676	}
		1677
		1678	{
		1679	dSP;
		1680	ENTER;
		1681	SAVETMPS;
		1682	PUTBACK;
		1683	PUSHSTACK;
		1684	PUSHMARK (SP);
		1685
		1686	if (ix)
		1687	eval_sv (coderef, 0);
		1688	else
		1689	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1690
		1691	POPSTACK;
		1692	SPAGAIN;
		1693	FREETMPS;
		1694	LEAVE;
		1695	PUTBACK;
		1696	}
		1697
		1698	if (!(coro->flags & CF_RUNNING))
		1699	{
		1700	save_perl (aTHX_ coro);
		1701	load_perl (aTHX_ &temp);
		1702	}
		1703	}
		1704	}
		1705
		1706	SV *
		1707	is_ready (Coro::State coro)
		1708	PROTOTYPE: $
		1709	ALIAS:
		1710	is_ready = CF_READY
		1711	is_running = CF_RUNNING
		1712	is_new = CF_NEW
		1713	is_destroyed = CF_DESTROYED
		1714	CODE:
		1715	RETVAL = boolSV (coro->flags & ix);
		1716	OUTPUT:
		1717	RETVAL
		1718
		1719	void
		1720	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1721
		1722	SV *
		1723	has_stack (Coro::State coro)
		1724	PROTOTYPE: $
		1725	CODE:
		1726	RETVAL = boolSV (!!coro->cctx);
		1727	OUTPUT:
		1728	RETVAL
		1729
		1730	int
		1731	is_traced (Coro::State coro)
		1732	PROTOTYPE: $
		1733	CODE:
		1734	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1735	OUTPUT:
		1736	RETVAL
		1737
		1738	IV
		1739	rss (Coro::State coro)
		1740	PROTOTYPE: $
		1741	ALIAS:
		1742	usecount = 1
986	CODE:	1743	CODE:
987	static SV *returnstk;	1744	switch (ix)
988	SV *sv;	1745	{
989	AV *defav = GvAV (PL_defgv);	1746	case 0: RETVAL = coro_rss (aTHX_ coro); break;
990	struct coro prev, next;	1747	case 1: RETVAL = coro->usecount; break;
		1748	}
		1749	OUTPUT:
		1750	RETVAL
991		1751
992	if (!returnstk)
993	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995	/* set up @_ -- ugly */
996	av_clear (defav);
997	av_fill (defav, items - 1);
998	while (items--)
999	av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002	sv = av_pop ((AV *)SvRV (returnstk));
1003	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1004	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1005	SvREFCNT_dec (sv);
1006
1007	transfer(aTHX_ prev, next, 0);
1008		1752
1009	MODULE = Coro::State PACKAGE = Coro	1753	MODULE = Coro::State PACKAGE = Coro
1010		1754
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1755	BOOT:
1014	{	1756	{
1015	int i;	1757	int i;
		1758
		1759	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1760	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1761	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1762
		1763	coro_current = coro_get_sv ("Coro::current", FALSE);
		1764	SvREADONLY_on (coro_current);
		1765
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1766	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1767
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1768	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1769	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1770	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1771	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1772	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1773	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027		1774
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1775	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029	coro_ready[i] = newAV ();	1776	coro_ready[i] = newAV ();
1030		1777
1031	{	1778	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1779	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1780	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1033		1781
1034	coroapi.schedule = api_schedule;	1782	coroapi.schedule = api_schedule;
		1783	coroapi.cede = api_cede;
		1784	coroapi.cede_notself = api_cede_notself;
1035	coroapi.ready = api_ready;	1785	coroapi.ready = api_ready;
		1786	coroapi.is_ready = api_is_ready;
1036	coroapi.nready = &coro_nready;	1787	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1788	coroapi.current = coro_current;
1038		1789
1039	GCoroAPI = &coroapi;	1790	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1791	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1792	SvREADONLY_on (sv);
1042	}	1793	}
1043	}	1794	}
1044		1795
1045	void	1796	void
1046	ready(self)	1797	_set_current (SV *current)
1047	SV * self	1798	PROTOTYPE: $
1048	CODE:	1799	CODE:
1049	api_ready (self);	1800	SvREFCNT_dec (SvRV (coro_current));
		1801	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1050		1802
1051	int	1803	int
		1804	prio (Coro::State coro, int newprio = 0)
		1805	ALIAS:
		1806	nice = 1
		1807	CODE:
		1808	{
		1809	RETVAL = coro->prio;
		1810
		1811	if (items > 1)
		1812	{
		1813	if (ix)
		1814	newprio = coro->prio - newprio;
		1815
		1816	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1817	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1818
		1819	coro->prio = newprio;
		1820	}
		1821	}
		1822	OUTPUT:
		1823	RETVAL
		1824
		1825	SV *
		1826	ready (SV *self)
		1827	PROTOTYPE: $
		1828	CODE:
		1829	RETVAL = boolSV (api_ready (self));
		1830	OUTPUT:
		1831	RETVAL
		1832
		1833	int
1052	nready(...)	1834	nready (...)
1053	PROTOTYPE:	1835	PROTOTYPE:
1054	CODE:	1836	CODE:
1055	RETVAL = coro_nready;	1837	RETVAL = coro_nready;
1056	OUTPUT:	1838	OUTPUT:
1057	RETVAL	1839	RETVAL
1058		1840
1059	void	1841	void
1060	schedule(...)	1842	throw (Coro::State self, SV *throw = &PL_sv_undef)
1061	PROTOTYPE:	1843	PROTOTYPE: $;$
1062	ALIAS:	1844	CODE:
1063	cede = 1	1845	SvREFCNT_dec (self->throw);
		1846	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1847
		1848	# for async_pool speedup
		1849	void
		1850	_pool_1 (SV *cb)
1064	CODE:	1851	CODE:
1065	api_schedule (ix);	1852	{
		1853	struct coro *coro = SvSTATE (coro_current);
		1854	HV hv = (HV )SvRV (coro_current);
		1855	AV *defav = GvAV (PL_defgv);
		1856	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1857	AV *invoke_av;
		1858	int i, len;
1066		1859
		1860	if (!invoke)
		1861	croak ("\3async_pool terminate\2\n");
		1862
		1863	SvREFCNT_dec (coro->saved_deffh);
		1864	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1865
		1866	hv_store (hv, "desc", sizeof ("desc") - 1,
		1867	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1868
		1869	invoke_av = (AV *)SvRV (invoke);
		1870	len = av_len (invoke_av);
		1871
		1872	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1873
		1874	if (len > 0)
		1875	{
		1876	av_fill (defav, len - 1);
		1877	for (i = 0; i < len; ++i)
		1878	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1879	}
		1880
		1881	SvREFCNT_dec (invoke);
		1882	}
		1883
		1884	void
		1885	_pool_2 (SV *cb)
		1886	CODE:
		1887	{
		1888	struct coro *coro = SvSTATE (coro_current);
		1889
		1890	sv_setsv (cb, &PL_sv_undef);
		1891
		1892	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1893	coro->saved_deffh = 0;
		1894
		1895	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1896	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1897	croak ("\3async_pool terminate\2\n");
		1898
		1899	av_clear (GvAV (PL_defgv));
		1900	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1901	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1902
		1903	coro->prio = 0;
		1904
		1905	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1906	api_trace (coro_current, 0);
		1907
		1908	av_push (av_async_pool, newSVsv (coro_current));
		1909	}
		1910
		1911
		1912	MODULE = Coro::State PACKAGE = Coro::AIO
		1913
		1914	SV *
		1915	_get_state ()
		1916	CODE:
		1917	{
		1918	struct io_state *data;
		1919
		1920	RETVAL = newSV (sizeof (struct io_state));
		1921	data = (struct io_state *)SvPVX (RETVAL);
		1922	SvCUR_set (RETVAL, sizeof (struct io_state));
		1923	SvPOK_only (RETVAL);
		1924
		1925	data->errorno = errno;
		1926	data->laststype = PL_laststype;
		1927	data->laststatval = PL_laststatval;
		1928	data->statcache = PL_statcache;
		1929	}
		1930	OUTPUT:
		1931	RETVAL
		1932
		1933	void
		1934	_set_state (char *data_)
		1935	PROTOTYPE: $
		1936	CODE:
		1937	{
		1938	struct io_state data = (void )data_;
		1939
		1940	errno = data->errorno;
		1941	PL_laststype = data->laststype;
		1942	PL_laststatval = data->laststatval;
		1943	PL_statcache = data->statcache;
		1944	}
		1945

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Comparing Coro/Coro/State.xs (file contents): Revision 1.34 by root, Fri Sep 14 15:40:56 2001 UTC vs. Revision 1.212 by root, Wed Oct 10 04:21:33 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.34 by root, Fri Sep 14 15:40:56 2001 UTC vs.
Revision 1.212 by root, Wed Oct 10 04:21:33 2007 UTC