[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 1.238 by root, Sat May 31 12:10:55 2008 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
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
8		24
9	#ifdef HAVE_MMAP	25	#ifdef HAVE_MMAP
10	# include <unistd.h>	26	# include <unistd.h>
11	# include <sys/mman.h>	27	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	28	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	29	# ifdef MAP_ANON
		30	# define MAP_ANONYMOUS MAP_ANON
15	# else	31	# else
16	# undef HAVE_MMAP	32	# undef HAVE_MMAP
17	# endif	33	# endif
18	# endif	34	# endif
		35	# include <limits.h>
		36	# ifndef PAGESIZE
		37	# define PAGESIZE pagesize
		38	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		39	static long pagesize;
		40	# else
		41	# define BOOT_PAGESIZE (void)0
19	#endif	42	# endif
		43	#else
		44	# define PAGESIZE 0
		45	# define BOOT_PAGESIZE (void)0
		46	#endif
20		47
21	#define MAY_FLUSH /* increases codesize and is rarely used */	48	#if CORO_USE_VALGRIND
		49	# include <valgrind/valgrind.h>
		50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
		53	#endif
22		54
23	#define SUB_INIT "Coro::State::initialize"	55	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	56	#define MAX_IDLE_CCTX 8
25		57
26	/* The next macro should declare a variable stacklevel that contains and approximation	58	#define PERL_VERSION_ATLEAST(a,b,c) \
27	* to the current C stack pointer. Its property is that it changes with each call	59	(PERL_REVISION > (a) \
28	* and should be unique. */	60	\|\| (PERL_REVISION == (a) \
		61	&& (PERL_VERSION > (b) \
		62	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		63
		64	#if !PERL_VERSION_ATLEAST (5,6,0)
		65	# ifndef PL_ppaddr
		66	# define PL_ppaddr ppaddr
		67	# endif
		68	# ifndef call_sv
		69	# define call_sv perl_call_sv
		70	# endif
		71	# ifndef get_sv
		72	# define get_sv perl_get_sv
		73	# endif
		74	# ifndef get_cv
		75	# define get_cv perl_get_cv
		76	# endif
		77	# ifndef IS_PADGV
		78	# define IS_PADGV(v) 0
		79	# endif
		80	# ifndef IS_PADCONST
		81	# define IS_PADCONST(v) 0
		82	# endif
		83	#endif
		84
		85	/* 5.8.8 */
		86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
		98	/* 5.8.7 */
		99	#ifndef SvRV_set
		100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
		102
		103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		104	# undef CORO_STACKGUARD
		105	#endif
		106
		107	#ifndef CORO_STACKGUARD
		108	# define CORO_STACKGUARD 0
		109	#endif
		110
		111	/* prefer perl internal functions over our own? */
		112	#ifndef CORO_PREFER_PERL_FUNCTIONS
		113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
		115
		116	/* The next macros try to return the current stack pointer, in an as
		117	* portable way as possible. */
		118	#define dSTACKLEVEL volatile char stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	119	#define STACKLEVEL ((void *)&stacklevel)
30		120
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		122
		123	#if __GNUC__ >= 3
		124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
		131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
		135
		136	#define NOINLINE attribute ((noinline))
32		137
33	#include "CoroAPI.h"	138	#include "CoroAPI.h"
34		139
		140	#ifdef USE_ITHREADS
		141	static perl_mutex coro_mutex;
		142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		144	#else
		145	# define LOCK (void)0
		146	# define UNLOCK (void)0
		147	#endif
		148
		149	/* helper storage struct for Coro::AIO */
		150	struct io_state
		151	{
		152	int errorno;
		153	I32 laststype;
		154	int laststatval;
		155	Stat_t statcache;
		156	};
		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
35	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
		160	static AV main_mainstack; / used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
		162	static HV coro_state_stash, coro_stash;
		163	static volatile SV coro_mortal; / will be freed after next transfer */
36		164
37	/* this is actually not only the c stack but also c registers etc... */	165	static GV irsgv; / $/ */
		166	static GV stdoutgv; / STDOUT /
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV hv_sig; / %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	/* Coro::AnyEvent */
		177	static SV *sv_activity;
		178
		179	static struct coro_cctx *cctx_first;
		180	static int cctx_count, cctx_idle;
		181
		182	enum {
		183	CC_MAPPED = 0x01,
		184	CC_NOREUSE = 0x02, /* throw this away after tracing */
		185	CC_TRACE = 0x04,
		186	CC_TRACE_SUB = 0x08, /* trace sub calls */
		187	CC_TRACE_LINE = 0x10, /* trace each statement */
		188	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		189	};
		190
		191	/* this is a structure representing a c-level coroutine */
		192	typedef struct coro_cctx {
		193	struct coro_cctx *next;
		194
		195	/* the stack */
		196	void *sptr;
		197	size_t ssize;
		198
		199	/* cpu state */
		200	void idle_sp; / sp of top-level transfer/schedule/cede call */
		201	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		202	JMPENV *top_env;
		203	coro_context cctx;
		204
		205	#if CORO_USE_VALGRIND
		206	int valgrind_id;
		207	#endif
		208	unsigned char flags;
		209	} coro_cctx;
		210
		211	enum {
		212	CF_RUNNING = 0x0001, /* coroutine is running */
		213	CF_READY = 0x0002, /* coroutine is ready */
		214	CF_NEW = 0x0004, /* has never been switched to */
		215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		216	};
		217
		218	/* the structure where most of the perl state is stored, overlaid on the cxstack */
38	typedef struct {	219	typedef struct {
39	int refcnt; /* pointer reference counter */	220	SV *defsv;
40	int usecnt; /* shared by how many coroutines */	221	AV *defav;
41	int gencnt; /* generation counter */	222	SV *errsv;
		223	SV *irsgv;
		224	#define VAR(name,type) type name;
		225	# include "state.h"
		226	#undef VAR
		227	} perl_slots;
42		228
43	coro_context cctx;	229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
44		230
45	void *sptr;	231	/* this is a structure representing a perl-level coroutine */
46	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48
49	struct coro {	232	struct coro {
50	/* the optional C context */	233	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	234	coro_cctx *cctx;
52	void *cursp;
53	int gencnt;
54		235
55	/* optionally saved, might be zero */	236	/* 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;	237	AV *mainstack;
68	SV **stack_sp;	238	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		239
92	/* data associated with this coroutine (initial args) */	240	AV args; / data associated with this coroutine (initial args) */
93	AV *args;	241	int refcnt; /* coroutines are refcounted, yes */
		242	int flags; /* CF_ flags */
		243	HV hv; / the perl hash associated with this coro, if any */
		244
		245	/* statistics */
		246	int usecount; /* number of transfers to this coro */
		247
		248	/* coro process data */
		249	int prio;
		250	SV throw; / exception to be thrown */
		251
		252	/* async_pool */
		253	SV *saved_deffh;
		254
		255	/* linked list */
		256	struct coro next, prev;
94	};	257	};
95		258
96	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	260	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		261
777	/ Coro ******************************************************************/	262	/ Coro ******************************************************************/
778		263
779	#define PRIO_MAX 3	264	#define PRIO_MAX 3
780	#define PRIO_HIGH 1	265	#define PRIO_HIGH 1
782	#define PRIO_LOW -1	267	#define PRIO_LOW -1
783	#define PRIO_IDLE -3	268	#define PRIO_IDLE -3
784	#define PRIO_MIN -4	269	#define PRIO_MIN -4
785		270
786	/* for Coro.pm */	271	/* for Coro.pm */
787	static GV coro_current, coro_idle;	272	static SV *coro_current;
		273	static SV *coro_readyhook;
788	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
789	static int coro_nready;	275	static int coro_nready;
		276	static struct coro *coro_first;
		277
		278	/ lowlevel stuff ********************************************************/
		279
		280	static SV *
		281	coro_get_sv (pTHX_ const char *name, int create)
		282	{
		283	#if PERL_VERSION_ATLEAST (5,10,0)
		284	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		285	get_sv (name, create);
		286	#endif
		287	return get_sv (name, create);
		288	}
		289
		290	static AV *
		291	coro_get_av (pTHX_ const char *name, int create)
		292	{
		293	#if PERL_VERSION_ATLEAST (5,10,0)
		294	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		295	get_av (name, create);
		296	#endif
		297	return get_av (name, create);
		298	}
		299
		300	static HV *
		301	coro_get_hv (pTHX_ const char *name, int create)
		302	{
		303	#if PERL_VERSION_ATLEAST (5,10,0)
		304	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		305	get_hv (name, create);
		306	#endif
		307	return get_hv (name, create);
		308	}
		309
		310	static AV *
		311	coro_clone_padlist (pTHX_ CV *cv)
		312	{
		313	AV *padlist = CvPADLIST (cv);
		314	AV newpadlist, newpad;
		315
		316	newpadlist = newAV ();
		317	AvREAL_off (newpadlist);
		318	#if PERL_VERSION_ATLEAST (5,10,0)
		319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		320	#else
		321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		322	#endif
		323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		324	--AvFILLp (padlist);
		325
		326	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		327	av_store (newpadlist, 1, (SV *)newpad);
		328
		329	return newpadlist;
		330	}
790		331
791	static void	332	static void
792	coro_enq (SV *sv)	333	free_padlist (pTHX_ AV *padlist)
793	{	334	{
794	if (SvROK (sv))	335	/* may be during global destruction */
		336	if (SvREFCNT (padlist))
795	{	337	{
796	SV *hv = SvRV (sv);	338	I32 i = AvFILLp (padlist);
797	if (SvTYPE (hv) == SVt_PVHV)	339	while (i >= 0)
798	{	340	{
799	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);	341	SV **svp = av_fetch (padlist, i--, FALSE);
800	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;	342	if (svp)
		343	{
		344	SV *sv;
		345	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		346	SvREFCNT_dec (sv);
801		347
802	prio = prio > PRIO_MAX ? PRIO_MAX	348	SvREFCNT_dec (*svp);
803	: prio < PRIO_MIN ? PRIO_MIN	349	}
804	: prio;
805
806	av_push (coro_ready [prio - PRIO_MIN], sv);
807	coro_nready++;
808
809	return;
810	}	350	}
		351
		352	SvREFCNT_dec ((SV*)padlist);
		353	}
		354	}
		355
		356	static int
		357	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		358	{
		359	AV *padlist;
		360	AV av = (AV )mg->mg_obj;
		361
		362	/* casting is fun. */
		363	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		364	free_padlist (aTHX_ padlist);
		365
		366	return 0;
		367	}
		368
		369	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		370	#define CORO_MAGIC_type_state PERL_MAGIC_ext
		371
		372	static MGVTBL coro_cv_vtbl = {
		373	0, 0, 0, 0,
		374	coro_cv_free
		375	};
		376
		377	#define CORO_MAGIC(sv,type) \
		378	SvMAGIC (sv) \
		379	? SvMAGIC (sv)->mg_type == type \
		380	? SvMAGIC (sv) \
		381	: mg_find (sv, type) \
		382	: 0
		383
		384	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		385	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		386
		387	static struct coro *
		388	SvSTATE_ (pTHX_ SV *coro)
		389	{
		390	HV *stash;
		391	MAGIC *mg;
		392
		393	if (SvROK (coro))
		394	coro = SvRV (coro);
		395
		396	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		397	croak ("Coro::State object required");
		398
		399	stash = SvSTASH (coro);
		400	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		401	{
		402	/* very slow, but rare, check */
		403	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		404	croak ("Coro::State object required");
		405	}
		406
		407	mg = CORO_MAGIC_state (coro);
		408	return (struct coro *)mg->mg_ptr;
		409	}
		410
		411	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		412
		413	/* the next two functions merely cache the padlists */
		414	static void
		415	get_padlist (pTHX_ CV *cv)
		416	{
		417	MAGIC *mg = CORO_MAGIC_cv (cv);
		418	AV *av;
		419
		420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
		421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		422	else
		423	{
		424	#if CORO_PREFER_PERL_FUNCTIONS
		425	/* this is probably cleaner, but also slower? */
		426	CV *cp = Perl_cv_clone (cv);
		427	CvPADLIST (cv) = CvPADLIST (cp);
		428	CvPADLIST (cp) = 0;
		429	SvREFCNT_dec (cp);
		430	#else
		431	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		432	#endif
811	}	433	}
		434	}
812		435
813	croak ("Coro::ready tried to enqueue something that is not a coroutine");	436	static void
		437	put_padlist (pTHX_ CV *cv)
		438	{
		439	MAGIC *mg = CORO_MAGIC_cv (cv);
		440	AV *av;
		441
		442	if (expect_false (!mg))
		443	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
		444
		445	av = (AV *)mg->mg_obj;
		446
		447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
		448	av_extend (av, AvMAX (av) + 1);
		449
		450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		451	}
		452
		453	/ load & save, init *****************************************************/
		454
		455	static void
		456	load_perl (pTHX_ Coro__State c)
		457	{
		458	perl_slots *slot = c->slot;
		459	c->slot = 0;
		460
		461	PL_mainstack = c->mainstack;
		462
		463	GvSV (PL_defgv) = slot->defsv;
		464	GvAV (PL_defgv) = slot->defav;
		465	GvSV (PL_errgv) = slot->errsv;
		466	GvSV (irsgv) = slot->irsgv;
		467
		468	#define VAR(name,type) PL_ ## name = slot->name;
		469	# include "state.h"
		470	#undef VAR
		471
		472	{
		473	dSP;
		474
		475	CV *cv;
		476
		477	/* now do the ugly restore mess */
		478	while (expect_true (cv = (CV *)POPs))
		479	{
		480	put_padlist (aTHX_ cv); /* mark this padlist as available */
		481	CvDEPTH (cv) = PTR2IV (POPs);
		482	CvPADLIST (cv) = (AV *)POPs;
		483	}
		484
		485	PUTBACK;
		486	}
		487	}
		488
		489	static void
		490	save_perl (pTHX_ Coro__State c)
		491	{
		492	{
		493	dSP;
		494	I32 cxix = cxstack_ix;
		495	PERL_CONTEXT *ccstk = cxstack;
		496	PERL_SI *top_si = PL_curstackinfo;
		497
		498	/*
		499	* the worst thing you can imagine happens first - we have to save
		500	* (and reinitialize) all cv's in the whole callchain :(
		501	*/
		502
		503	XPUSHs (Nullsv);
		504	/* this loop was inspired by pp_caller */
		505	for (;;)
		506	{
		507	while (expect_true (cxix >= 0))
		508	{
		509	PERL_CONTEXT *cx = &ccstk[cxix--];
		510
		511	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
		512	{
		513	CV *cv = cx->blk_sub.cv;
		514
		515	if (expect_true (CvDEPTH (cv)))
		516	{
		517	EXTEND (SP, 3);
		518	PUSHs ((SV *)CvPADLIST (cv));
		519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
		520	PUSHs ((SV *)cv);
		521
		522	CvDEPTH (cv) = 0;
		523	get_padlist (aTHX_ cv);
		524	}
		525	}
		526	}
		527
		528	if (expect_true (top_si->si_type == PERLSI_MAIN))
		529	break;
		530
		531	top_si = top_si->si_prev;
		532	ccstk = top_si->si_cxstack;
		533	cxix = top_si->si_cxix;
		534	}
		535
		536	PUTBACK;
		537	}
		538
		539	/* allocate some space on the context stack for our purposes */
		540	/* we manually unroll here, as usually 2 slots is enough */
		541	if (SLOT_COUNT >= 1) CXINC;
		542	if (SLOT_COUNT >= 2) CXINC;
		543	if (SLOT_COUNT >= 3) CXINC;
		544	{
		545	int i;
		546	for (i = 3; i < SLOT_COUNT; ++i)
		547	CXINC;
		548	}
		549	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		550
		551	c->mainstack = PL_mainstack;
		552
		553	{
		554	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		555
		556	slot->defav = GvAV (PL_defgv);
		557	slot->defsv = DEFSV;
		558	slot->errsv = ERRSV;
		559	slot->irsgv = GvSV (irsgv);
		560
		561	#define VAR(name,type) slot->name = PL_ ## name;
		562	# include "state.h"
		563	#undef VAR
		564	}
		565	}
		566
		567	/*
		568	* allocate various perl stacks. This is an exact copy
		569	* of perl.c:init_stacks, except that it uses less memory
		570	* on the (sometimes correct) assumption that coroutines do
		571	* not usually need a lot of stackspace.
		572	*/
		573	#if CORO_PREFER_PERL_FUNCTIONS
		574	# define coro_init_stacks init_stacks
		575	#else
		576	static void
		577	coro_init_stacks (pTHX)
		578	{
		579	PL_curstackinfo = new_stackinfo(32, 8);
		580	PL_curstackinfo->si_type = PERLSI_MAIN;
		581	PL_curstack = PL_curstackinfo->si_stack;
		582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		583
		584	PL_stack_base = AvARRAY(PL_curstack);
		585	PL_stack_sp = PL_stack_base;
		586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		587
		588	New(50,PL_tmps_stack,32,SV*);
		589	PL_tmps_floor = -1;
		590	PL_tmps_ix = -1;
		591	PL_tmps_max = 32;
		592
		593	New(54,PL_markstack,16,I32);
		594	PL_markstack_ptr = PL_markstack;
		595	PL_markstack_max = PL_markstack + 16;
		596
		597	#ifdef SET_MARK_OFFSET
		598	SET_MARK_OFFSET;
		599	#endif
		600
		601	New(54,PL_scopestack,8,I32);
		602	PL_scopestack_ix = 0;
		603	PL_scopestack_max = 8;
		604
		605	New(54,PL_savestack,24,ANY);
		606	PL_savestack_ix = 0;
		607	PL_savestack_max = 24;
		608
		609	#if !PERL_VERSION_ATLEAST (5,10,0)
		610	New(54,PL_retstack,4,OP*);
		611	PL_retstack_ix = 0;
		612	PL_retstack_max = 4;
		613	#endif
		614	}
		615	#endif
		616
		617	/*
		618	* destroy the stacks, the callchain etc...
		619	*/
		620	static void
		621	coro_destroy_stacks (pTHX)
		622	{
		623	while (PL_curstackinfo->si_next)
		624	PL_curstackinfo = PL_curstackinfo->si_next;
		625
		626	while (PL_curstackinfo)
		627	{
		628	PERL_SI *p = PL_curstackinfo->si_prev;
		629
		630	if (!IN_DESTRUCT)
		631	SvREFCNT_dec (PL_curstackinfo->si_stack);
		632
		633	Safefree (PL_curstackinfo->si_cxstack);
		634	Safefree (PL_curstackinfo);
		635	PL_curstackinfo = p;
		636	}
		637
		638	Safefree (PL_tmps_stack);
		639	Safefree (PL_markstack);
		640	Safefree (PL_scopestack);
		641	Safefree (PL_savestack);
		642	#if !PERL_VERSION_ATLEAST (5,10,0)
		643	Safefree (PL_retstack);
		644	#endif
		645	}
		646
		647	static size_t
		648	coro_rss (pTHX_ struct coro *coro)
		649	{
		650	size_t rss = sizeof (*coro);
		651
		652	if (coro->mainstack)
		653	{
		654	perl_slots tmp_slot;
		655	perl_slots *slot;
		656
		657	if (coro->flags & CF_RUNNING)
		658	{
		659	slot = &tmp_slot;
		660
		661	#define VAR(name,type) slot->name = PL_ ## name;
		662	# include "state.h"
		663	#undef VAR
		664	}
		665	else
		666	slot = coro->slot;
		667
		668	rss += sizeof (slot->curstackinfo);
		669	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		670	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		671	rss += slot->tmps_max * sizeof (SV *);
		672	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		673	rss += slot->scopestack_max * sizeof (I32);
		674	rss += slot->savestack_max * sizeof (ANY);
		675
		676	#if !PERL_VERSION_ATLEAST (5,10,0)
		677	rss += slot->retstack_max * sizeof (OP *);
		678	#endif
		679	}
		680
		681	return rss;
		682	}
		683
		684	/ coroutine stack handling **********************************************/
		685
		686	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
		687	static int (orig_sigelem_set) (pTHX_ SV sv, MAGIC *mg);
		688
		689	/* apparently < 5.8.8 */
		690	#undef MgPV_nolen_const
		691	#ifndef MgPV_nolen_const
		692	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		693	SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
		694	(const char*)(mg)->mg_ptr)
		695	#endif
		696
		697	/*
		698	* This overrides the default magic get method of %SIG elements.
		699	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		700	* and instead of tryign to save and restore the hash elements, we just provide
		701	* readback here.
		702	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		703	* not expecting this to actually change the hook. This is a potential problem
		704	* when a schedule happens then, but we ignore this.
		705	*/
		706	static int
		707	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		708	{
		709	const char *s = MgPV_nolen_const (mg);
		710
		711	if (*s == '_')
		712	{
		713	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		714	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		715	}
		716
		717	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		718	}
		719
		720	static int
		721	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		722	{
		723	const char *s = MgPV_nolen_const (mg);
		724
		725	if (*s == '_')
		726	{
		727	SV **svp = 0;
		728
		729	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		730	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		731
		732	if (svp)
		733	{
		734	SV old = svp;
		735	*svp = newSVsv (sv);
		736	SvREFCNT_dec (old);
		737	return 0;
		738	}
		739	}
		740
		741	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		742	}
		743
		744	static void
		745	coro_setup (pTHX_ struct coro *coro)
		746	{
		747	/*
		748	* emulate part of the perl startup here.
		749	*/
		750	coro_init_stacks (aTHX);
		751
		752	PL_runops = RUNOPS_DEFAULT;
		753	PL_curcop = &PL_compiling;
		754	PL_in_eval = EVAL_NULL;
		755	PL_comppad = 0;
		756	PL_curpm = 0;
		757	PL_curpad = 0;
		758	PL_localizing = 0;
		759	PL_dirty = 0;
		760	PL_restartop = 0;
		761	#if PERL_VERSION_ATLEAST (5,10,0)
		762	PL_parser = 0;
		763	#endif
		764
		765	/* recreate the die/warn hooks */
		766	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		767	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		768
		769	GvSV (PL_defgv) = newSV (0);
		770	GvAV (PL_defgv) = coro->args; coro->args = 0;
		771	GvSV (PL_errgv) = newSV (0);
		772	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		773	PL_rs = newSVsv (GvSV (irsgv));
		774	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		775
		776	{
		777	dSP;
		778	LOGOP myop;
		779
		780	Zero (&myop, 1, LOGOP);
		781	myop.op_next = Nullop;
		782	myop.op_flags = OPf_WANT_VOID;
		783
		784	PUSHMARK (SP);
		785	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		786	PUTBACK;
		787	PL_op = (OP *)&myop;
		788	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		789	SPAGAIN;
		790	}
		791
		792	/* this newly created coroutine might be run on an existing cctx which most
		793	* likely was suspended in set_stacklevel, called from entersub.
		794	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		795	* so we ENTER here for symmetry
		796	*/
		797	ENTER;
		798	}
		799
		800	static void
		801	coro_destroy (pTHX_ struct coro *coro)
		802	{
		803	if (!IN_DESTRUCT)
		804	{
		805	/* restore all saved variables and stuff */
		806	LEAVE_SCOPE (0);
		807	assert (PL_tmps_floor == -1);
		808
		809	/* free all temporaries */
		810	FREETMPS;
		811	assert (PL_tmps_ix == -1);
		812
		813	/* unwind all extra stacks */
		814	POPSTACK_TO (PL_mainstack);
		815
		816	/* unwind main stack */
		817	dounwind (-1);
		818	}
		819
		820	SvREFCNT_dec (GvSV (PL_defgv));
		821	SvREFCNT_dec (GvAV (PL_defgv));
		822	SvREFCNT_dec (GvSV (PL_errgv));
		823	SvREFCNT_dec (PL_defoutgv);
		824	SvREFCNT_dec (PL_rs);
		825	SvREFCNT_dec (GvSV (irsgv));
		826
		827	SvREFCNT_dec (PL_diehook);
		828	SvREFCNT_dec (PL_warnhook);
		829
		830	SvREFCNT_dec (coro->saved_deffh);
		831	SvREFCNT_dec (coro->throw);
		832
		833	coro_destroy_stacks (aTHX);
		834	}
		835
		836	static void
		837	free_coro_mortal (pTHX)
		838	{
		839	if (expect_true (coro_mortal))
		840	{
		841	SvREFCNT_dec (coro_mortal);
		842	coro_mortal = 0;
		843	}
		844	}
		845
		846	static int
		847	runops_trace (pTHX)
		848	{
		849	COP *oldcop = 0;
		850	int oldcxix = -2;
		851	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		852	coro_cctx *cctx = coro->cctx;
		853
		854	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		855	{
		856	PERL_ASYNC_CHECK ();
		857
		858	if (cctx->flags & CC_TRACE_ALL)
		859	{
		860	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		861	{
		862	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		863	SV bot, top;
		864	AV av = newAV (); / return values */
		865	SV **cb;
		866	dSP;
		867
		868	GV *gv = CvGV (cx->blk_sub.cv);
		869	SV *fullname = sv_2mortal (newSV (0));
		870	if (isGV (gv))
		871	gv_efullname3 (fullname, gv, 0);
		872
		873	bot = PL_stack_base + cx->blk_oldsp + 1;
		874	top = cx->blk_gimme == G_ARRAY ? SP + 1
		875	: cx->blk_gimme == G_SCALAR ? bot + 1
		876	: bot;
		877
		878	av_extend (av, top - bot);
		879	while (bot < top)
		880	av_push (av, SvREFCNT_inc (*bot++));
		881
		882	PL_runops = RUNOPS_DEFAULT;
		883	ENTER;
		884	SAVETMPS;
		885	EXTEND (SP, 3);
		886	PUSHMARK (SP);
		887	PUSHs (&PL_sv_no);
		888	PUSHs (fullname);
		889	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		890	PUTBACK;
		891	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		892	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		893	SPAGAIN;
		894	FREETMPS;
		895	LEAVE;
		896	PL_runops = runops_trace;
		897	}
		898
		899	if (oldcop != PL_curcop)
		900	{
		901	oldcop = PL_curcop;
		902
		903	if (PL_curcop != &PL_compiling)
		904	{
		905	SV **cb;
		906
		907	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		908	{
		909	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		910
		911	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		912	{
		913	runops_proc_t old_runops = PL_runops;
		914	dSP;
		915	GV *gv = CvGV (cx->blk_sub.cv);
		916	SV *fullname = sv_2mortal (newSV (0));
		917
		918	if (isGV (gv))
		919	gv_efullname3 (fullname, gv, 0);
		920
		921	PL_runops = RUNOPS_DEFAULT;
		922	ENTER;
		923	SAVETMPS;
		924	EXTEND (SP, 3);
		925	PUSHMARK (SP);
		926	PUSHs (&PL_sv_yes);
		927	PUSHs (fullname);
		928	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		929	PUTBACK;
		930	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		931	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		932	SPAGAIN;
		933	FREETMPS;
		934	LEAVE;
		935	PL_runops = runops_trace;
		936	}
		937
		938	oldcxix = cxstack_ix;
		939	}
		940
		941	if (cctx->flags & CC_TRACE_LINE)
		942	{
		943	dSP;
		944
		945	PL_runops = RUNOPS_DEFAULT;
		946	ENTER;
		947	SAVETMPS;
		948	EXTEND (SP, 3);
		949	PL_runops = RUNOPS_DEFAULT;
		950	PUSHMARK (SP);
		951	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		952	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		953	PUTBACK;
		954	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		955	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		956	SPAGAIN;
		957	FREETMPS;
		958	LEAVE;
		959	PL_runops = runops_trace;
		960	}
		961	}
		962	}
		963	}
		964	}
		965
		966	TAINT_NOT;
		967	return 0;
		968	}
		969
		970	/* inject a fake call to Coro::State::_cctx_init into the execution */
		971	/* _cctx_init should be careful, as it could be called at almost any time */
		972	/* during execution of a perl program */
		973	static void NOINLINE
		974	cctx_prepare (pTHX_ coro_cctx *cctx)
		975	{
		976	dSP;
		977	LOGOP myop;
		978
		979	PL_top_env = &PL_start_env;
		980
		981	if (cctx->flags & CC_TRACE)
		982	PL_runops = runops_trace;
		983
		984	Zero (&myop, 1, LOGOP);
		985	myop.op_next = PL_op;
		986	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		987
		988	PUSHMARK (SP);
		989	EXTEND (SP, 2);
		990	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		991	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		992	PUTBACK;
		993	PL_op = (OP *)&myop;
		994	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		995	SPAGAIN;
		996	}
		997
		998	/*
		999	* this is a _very_ stripped down perl interpreter ;)
		1000	*/
		1001	static void
		1002	cctx_run (void *arg)
		1003	{
		1004	dTHX;
		1005
		1006	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		1007	UNLOCK;
		1008
		1009	/* we now skip the entersub that lead to transfer() */
		1010	PL_op = PL_op->op_next;
		1011
		1012	/* inject a fake subroutine call to cctx_init */
		1013	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1014
		1015	/* somebody or something will hit me for both perl_run and PL_restartop */
		1016	PL_restartop = PL_op;
		1017	perl_run (PL_curinterp);
		1018
		1019	/*
		1020	* If perl-run returns we assume exit() was being called or the coro
		1021	* fell off the end, which seems to be the only valid (non-bug)
		1022	* reason for perl_run to return. We try to exit by jumping to the
		1023	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1024	* coroutine as Coro has no such concept
		1025	*/
		1026	PL_top_env = main_top_env;
		1027	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1028	}
		1029
		1030	static coro_cctx *
		1031	cctx_new ()
		1032	{
		1033	coro_cctx *cctx;
		1034	void *stack_start;
		1035	size_t stack_size;
		1036
		1037	++cctx_count;
		1038
		1039	Newz (0, cctx, 1, coro_cctx);
		1040
		1041	#if HAVE_MMAP
		1042	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1043	/* mmap supposedly does allocate-on-write for us */
		1044	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		1045
		1046	if (cctx->sptr != (void *)-1)
		1047	{
		1048	# if CORO_STACKGUARD
		1049	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1050	# endif
		1051	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1052	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1053	cctx->flags \|= CC_MAPPED;
		1054	}
		1055	else
		1056	#endif
		1057	{
		1058	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1059	New (0, cctx->sptr, coro_stacksize, long);
		1060
		1061	if (!cctx->sptr)
		1062	{
		1063	perror ("FATAL: unable to allocate stack for coroutine");
		1064	_exit (EXIT_FAILURE);
		1065	}
		1066
		1067	stack_start = cctx->sptr;
		1068	stack_size = cctx->ssize;
		1069	}
		1070
		1071	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		1072	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1073
		1074	return cctx;
		1075	}
		1076
		1077	static void
		1078	cctx_destroy (coro_cctx *cctx)
		1079	{
		1080	if (!cctx)
		1081	return;
		1082
		1083	--cctx_count;
		1084
		1085	#if CORO_USE_VALGRIND
		1086	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1087	#endif
		1088
		1089	#if HAVE_MMAP
		1090	if (cctx->flags & CC_MAPPED)
		1091	munmap (cctx->sptr, cctx->ssize);
		1092	else
		1093	#endif
		1094	Safefree (cctx->sptr);
		1095
		1096	Safefree (cctx);
		1097	}
		1098
		1099	/* wether this cctx should be destructed */
		1100	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1101
		1102	static coro_cctx *
		1103	cctx_get (pTHX)
		1104	{
		1105	while (expect_true (cctx_first))
		1106	{
		1107	coro_cctx *cctx = cctx_first;
		1108	cctx_first = cctx->next;
		1109	--cctx_idle;
		1110
		1111	if (expect_true (!CCTX_EXPIRED (cctx)))
		1112	return cctx;
		1113
		1114	cctx_destroy (cctx);
		1115	}
		1116
		1117	return cctx_new ();
		1118	}
		1119
		1120	static void
		1121	cctx_put (coro_cctx *cctx)
		1122	{
		1123	/* free another cctx if overlimit */
		1124	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1125	{
		1126	coro_cctx *first = cctx_first;
		1127	cctx_first = first->next;
		1128	--cctx_idle;
		1129
		1130	cctx_destroy (first);
		1131	}
		1132
		1133	++cctx_idle;
		1134	cctx->next = cctx_first;
		1135	cctx_first = cctx;
		1136	}
		1137
		1138	/ coroutine switching ***************************************************/
		1139
		1140	static void
		1141	transfer_check (pTHX_ struct coro prev, struct coro next)
		1142	{
		1143	if (expect_true (prev != next))
		1144	{
		1145	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1146	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1147
		1148	if (expect_false (next->flags & CF_RUNNING))
		1149	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1150
		1151	if (expect_false (next->flags & CF_DESTROYED))
		1152	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1153
		1154	#if !PERL_VERSION_ATLEAST (5,10,0)
		1155	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1156	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1157	#endif
		1158	}
		1159	}
		1160
		1161	/* always use the TRANSFER macro */
		1162	static void NOINLINE
		1163	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
		1164	{
		1165	dSTACKLEVEL;
		1166	static volatile int has_throw;
		1167
		1168	/* sometimes transfer is only called to set idle_sp */
		1169	if (expect_false (!next))
		1170	{
		1171	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1172	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1173	}
		1174	else if (expect_true (prev != next))
		1175	{
		1176	coro_cctx *prev__cctx;
		1177
		1178	if (expect_false (prev->flags & CF_NEW))
		1179	{
		1180	/* create a new empty context */
		1181	Newz (0, prev->cctx, 1, coro_cctx);
		1182	prev->flags &= ~CF_NEW;
		1183	prev->flags \|= CF_RUNNING;
		1184	}
		1185
		1186	prev->flags &= ~CF_RUNNING;
		1187	next->flags \|= CF_RUNNING;
		1188
		1189	LOCK;
		1190
		1191	/* first get rid of the old state */
		1192	save_perl (aTHX_ prev);
		1193
		1194	if (expect_false (next->flags & CF_NEW))
		1195	{
		1196	/* need to start coroutine */
		1197	next->flags &= ~CF_NEW;
		1198	/* setup coroutine call */
		1199	coro_setup (aTHX_ next);
		1200	}
		1201	else
		1202	load_perl (aTHX_ next);
		1203
		1204	prev__cctx = prev->cctx;
		1205
		1206	/* possibly "free" the cctx */
		1207	if (expect_true (
		1208	prev__cctx->idle_sp == STACKLEVEL
		1209	&& !(prev__cctx->flags & CC_TRACE)
		1210	&& !force_cctx
		1211	))
		1212	{
		1213	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1214	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1215
		1216	prev->cctx = 0;
		1217
		1218	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1219	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1220	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1221	if (!next->cctx)
		1222	next->cctx = cctx_get (aTHX);
		1223
		1224	cctx_put (prev__cctx);
		1225	}
		1226
		1227	++next->usecount;
		1228
		1229	if (expect_true (!next->cctx))
		1230	next->cctx = cctx_get (aTHX);
		1231
		1232	has_throw = !!next->throw;
		1233
		1234	if (expect_false (prev__cctx != next->cctx))
		1235	{
		1236	prev__cctx->top_env = PL_top_env;
		1237	PL_top_env = next->cctx->top_env;
		1238	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1239	}
		1240
		1241	free_coro_mortal (aTHX);
		1242	UNLOCK;
		1243
		1244	if (expect_false (has_throw))
		1245	{
		1246	struct coro *coro = SvSTATE (coro_current);
		1247
		1248	if (coro->throw)
		1249	{
		1250	SV *exception = coro->throw;
		1251	coro->throw = 0;
		1252	sv_setsv (ERRSV, exception);
		1253	croak (0);
		1254	}
		1255	}
		1256	}
		1257	}
		1258
		1259	struct transfer_args
		1260	{
		1261	struct coro prev, next;
		1262	};
		1263
		1264	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1265	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1266
		1267	/ high level stuff ******************************************************/
		1268
		1269	static int
		1270	coro_state_destroy (pTHX_ struct coro *coro)
		1271	{
		1272	if (coro->flags & CF_DESTROYED)
		1273	return 0;
		1274
		1275	coro->flags \|= CF_DESTROYED;
		1276
		1277	if (coro->flags & CF_READY)
		1278	{
		1279	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1280	/* alternative: look through all ready queues and remove the coro */
		1281	LOCK;
		1282	--coro_nready;
		1283	UNLOCK;
		1284	}
		1285	else
		1286	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1287
		1288	if (coro->mainstack && coro->mainstack != main_mainstack)
		1289	{
		1290	struct coro temp;
		1291
		1292	if (coro->flags & CF_RUNNING)
		1293	croak ("FATAL: tried to destroy currently running coroutine");
		1294
		1295	save_perl (aTHX_ &temp);
		1296	load_perl (aTHX_ coro);
		1297
		1298	coro_destroy (aTHX_ coro);
		1299
		1300	load_perl (aTHX_ &temp);
		1301
		1302	coro->slot = 0;
		1303	}
		1304
		1305	cctx_destroy (coro->cctx);
		1306	SvREFCNT_dec (coro->args);
		1307
		1308	if (coro->next) coro->next->prev = coro->prev;
		1309	if (coro->prev) coro->prev->next = coro->next;
		1310	if (coro == coro_first) coro_first = coro->next;
		1311
		1312	return 1;
		1313	}
		1314
		1315	static int
		1316	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1317	{
		1318	struct coro coro = (struct coro )mg->mg_ptr;
		1319	mg->mg_ptr = 0;
		1320
		1321	coro->hv = 0;
		1322
		1323	if (--coro->refcnt < 0)
		1324	{
		1325	coro_state_destroy (aTHX_ coro);
		1326	Safefree (coro);
		1327	}
		1328
		1329	return 0;
		1330	}
		1331
		1332	static int
		1333	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1334	{
		1335	struct coro coro = (struct coro )mg->mg_ptr;
		1336
		1337	++coro->refcnt;
		1338
		1339	return 0;
		1340	}
		1341
		1342	static MGVTBL coro_state_vtbl = {
		1343	0, 0, 0, 0,
		1344	coro_state_free,
		1345	0,
		1346	#ifdef MGf_DUP
		1347	coro_state_dup,
		1348	#else
		1349	# define MGf_DUP 0
		1350	#endif
		1351	};
		1352
		1353	static void
		1354	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1355	{
		1356	ta->prev = SvSTATE (prev_sv);
		1357	ta->next = SvSTATE (next_sv);
		1358	TRANSFER_CHECK (*ta);
		1359	}
		1360
		1361	static void
		1362	api_transfer (SV prev_sv, SV next_sv)
		1363	{
		1364	dTHX;
		1365	struct transfer_args ta;
		1366
		1367	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1368	TRANSFER (ta, 1);
		1369	}
		1370
		1371	/ Coro ******************************************************************/
		1372
		1373	static void
		1374	coro_enq (pTHX_ SV *coro_sv)
		1375	{
		1376	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
814	}	1377	}
815		1378
816	static SV *	1379	static SV *
817	coro_deq (int min_prio)	1380	coro_deq (pTHX)
818	{	1381	{
819	int prio = PRIO_MAX - PRIO_MIN;	1382	int prio;
820		1383
821	min_prio -= PRIO_MIN;
822	if (min_prio < 0)
823	min_prio = 0;
824
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1384	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
826	if (av_len (coro_ready[prio]) >= 0)	1385	if (AvFILLp (coro_ready [prio]) >= 0)
827	{
828	coro_nready--;
829	return av_shift (coro_ready[prio]);	1386	return av_shift (coro_ready [prio]);
830	}
831		1387
832	return 0;	1388	return 0;
833	}	1389	}
834		1390
		1391	static int
		1392	api_ready (SV *coro_sv)
		1393	{
		1394	dTHX;
		1395	struct coro *coro;
		1396	SV *sv_hook;
		1397	void (*xs_hook)(void);
		1398
		1399	if (SvROK (coro_sv))
		1400	coro_sv = SvRV (coro_sv);
		1401
		1402	coro = SvSTATE (coro_sv);
		1403
		1404	if (coro->flags & CF_READY)
		1405	return 0;
		1406
		1407	coro->flags \|= CF_READY;
		1408
		1409	LOCK;
		1410
		1411	sv_hook = coro_nready ? 0 : coro_readyhook;
		1412	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1413
		1414	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1415	++coro_nready;
		1416
		1417	UNLOCK;
		1418
		1419	if (sv_hook)
		1420	{
		1421	dSP;
		1422
		1423	ENTER;
		1424	SAVETMPS;
		1425
		1426	PUSHMARK (SP);
		1427	PUTBACK;
		1428	call_sv (sv_hook, G_DISCARD);
		1429	SPAGAIN;
		1430
		1431	FREETMPS;
		1432	LEAVE;
		1433	}
		1434
		1435	if (xs_hook)
		1436	xs_hook ();
		1437
		1438	return 1;
		1439	}
		1440
		1441	static int
		1442	api_is_ready (SV *coro_sv)
		1443	{
		1444	dTHX;
		1445	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1446	}
		1447
835	static void	1448	static void
836	api_ready (SV *coro)	1449	prepare_schedule (pTHX_ struct transfer_args *ta)
837	{	1450	{
838	coro_enq (SvREFCNT_inc (coro));	1451	SV prev_sv, next_sv;
		1452
		1453	for (;;)
		1454	{
		1455	LOCK;
		1456	next_sv = coro_deq (aTHX);
		1457
		1458	/* nothing to schedule: call the idle handler */
		1459	if (expect_false (!next_sv))
		1460	{
		1461	dSP;
		1462	UNLOCK;
		1463
		1464	ENTER;
		1465	SAVETMPS;
		1466
		1467	PUSHMARK (SP);
		1468	PUTBACK;
		1469	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1470	SPAGAIN;
		1471
		1472	FREETMPS;
		1473	LEAVE;
		1474	continue;
		1475	}
		1476
		1477	ta->next = SvSTATE (next_sv);
		1478
		1479	/* cannot transfer to destroyed coros, skip and look for next */
		1480	if (expect_false (ta->next->flags & CF_DESTROYED))
		1481	{
		1482	UNLOCK;
		1483	SvREFCNT_dec (next_sv);
		1484	/* coro_nready is already taken care of by destroy */
		1485	continue;
		1486	}
		1487
		1488	--coro_nready;
		1489	UNLOCK;
		1490	break;
		1491	}
		1492
		1493	/* free this only after the transfer */
		1494	prev_sv = SvRV (coro_current);
		1495	ta->prev = SvSTATE (prev_sv);
		1496	TRANSFER_CHECK (*ta);
		1497	assert (ta->next->flags & CF_READY);
		1498	ta->next->flags &= ~CF_READY;
		1499	SvRV_set (coro_current, next_sv);
		1500
		1501	LOCK;
		1502	free_coro_mortal (aTHX);
		1503	coro_mortal = prev_sv;
		1504	UNLOCK;
839	}	1505	}
840		1506
841	static void	1507	static void
842	api_schedule (int cede)	1508	prepare_cede (pTHX_ struct transfer_args *ta)
843	{	1509	{
844	SV prev, next;	1510	api_ready (coro_current);
		1511	prepare_schedule (aTHX_ ta);
		1512	}
845		1513
		1514	static int
		1515	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1516	{
		1517	if (coro_nready)
		1518	{
846	prev = GvSV (coro_current);	1519	SV *prev = SvRV (coro_current);
847		1520	prepare_schedule (aTHX_ ta);
848	if (cede)	1521	api_ready (prev);
849	coro_enq (SvREFCNT_inc (prev));	1522	return 1;
850		1523	}
851	next = coro_deq (PRIO_MIN);	1524	else
852		1525	return 0;
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	}	1526	}
864		1527
		1528	static void
		1529	api_schedule (void)
		1530	{
		1531	dTHX;
		1532	struct transfer_args ta;
		1533
		1534	prepare_schedule (aTHX_ &ta);
		1535	TRANSFER (ta, 1);
		1536	}
		1537
		1538	static int
		1539	api_cede (void)
		1540	{
		1541	dTHX;
		1542	struct transfer_args ta;
		1543
		1544	prepare_cede (aTHX_ &ta);
		1545
		1546	if (expect_true (ta.prev != ta.next))
		1547	{
		1548	TRANSFER (ta, 1);
		1549	return 1;
		1550	}
		1551	else
		1552	return 0;
		1553	}
		1554
		1555	static int
		1556	api_cede_notself (void)
		1557	{
		1558	dTHX;
		1559	struct transfer_args ta;
		1560
		1561	if (prepare_cede_notself (aTHX_ &ta))
		1562	{
		1563	TRANSFER (ta, 1);
		1564	return 1;
		1565	}
		1566	else
		1567	return 0;
		1568	}
		1569
		1570	static void
		1571	api_trace (SV *coro_sv, int flags)
		1572	{
		1573	dTHX;
		1574	struct coro *coro = SvSTATE (coro_sv);
		1575
		1576	if (flags & CC_TRACE)
		1577	{
		1578	if (!coro->cctx)
		1579	coro->cctx = cctx_new ();
		1580	else if (!(coro->cctx->flags & CC_TRACE))
		1581	croak ("cannot enable tracing on coroutine with custom stack");
		1582
		1583	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1584	}
		1585	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1586	{
		1587	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1588
		1589	if (coro->flags & CF_RUNNING)
		1590	PL_runops = RUNOPS_DEFAULT;
		1591	else
		1592	coro->slot->runops = RUNOPS_DEFAULT;
		1593	}
		1594	}
		1595
865	MODULE = Coro::State PACKAGE = Coro::State	1596	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
866		1597
867	PROTOTYPES: ENABLE	1598	PROTOTYPES: DISABLE
868		1599
869	BOOT:	1600	BOOT:
870	{ /* {} necessary for stoopid perl-5.6.x */	1601	{
871	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1602	#ifdef USE_ITHREADS
872	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1603	MUTEX_INIT (&coro_mutex);
		1604	#endif
		1605	BOOT_PAGESIZE;
		1606
		1607	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1608	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1609
		1610	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1611	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1612	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1613	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1614
		1615	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1616	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1617	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1618
873	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1619	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
874		1620
875	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1621	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
876	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1622	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
877	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1623	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
878	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1624	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
879
880	if (!padlist_cache)
881	padlist_cache = newHV ();
882		1625
883	main_mainstack = PL_mainstack;	1626	main_mainstack = PL_mainstack;
		1627	main_top_env = PL_top_env;
884		1628
		1629	while (main_top_env->je_prev)
		1630	main_top_env = main_top_env->je_prev;
		1631
885	coroapi.ver = CORO_API_VERSION;	1632	coroapi.ver = CORO_API_VERSION;
		1633	coroapi.rev = CORO_API_REVISION;
886	coroapi.transfer = api_transfer;	1634	coroapi.transfer = api_transfer;
887	}
888		1635
889	Coro::State	1636	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
890	_newprocess(args)	1637	}
891	SV * args	1638
892	PROTOTYPE: $	1639	SV *
		1640	new (char *klass, ...)
893	CODE:	1641	CODE:
894	Coro__State coro;	1642	{
		1643	struct coro *coro;
		1644	MAGIC *mg;
		1645	HV *hv;
		1646	int i;
895		1647
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);	1648	Newz (0, coro, 1, struct coro);
		1649	coro->args = newAV ();
		1650	coro->flags = CF_NEW;
900		1651
901	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1652	if (coro_first) coro_first->prev = coro;
902	coro->mainstack = 0; /* actual work is done inside transfer */	1653	coro->next = coro_first;
903	coro->stack = 0;	1654	coro_first = coro;
904		1655
905	RETVAL = coro;	1656	coro->hv = hv = newHV ();
		1657	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1658	mg->mg_flags \|= MGf_DUP;
		1659	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1660
		1661	av_extend (coro->args, items - 1);
		1662	for (i = 1; i < items; i++)
		1663	av_push (coro->args, newSVsv (ST (i)));
		1664	}
906	OUTPUT:	1665	OUTPUT:
907	RETVAL	1666	RETVAL
908		1667
		1668	# these not obviously related functions are all rolled into the same xs
		1669	# function to increase chances that they all will call transfer with the same
		1670	# stack offset
909	void	1671	void
910	transfer(prev, next, flags)	1672	_set_stacklevel (...)
911	Coro::State_or_hashref prev	1673	ALIAS:
912	Coro::State_or_hashref next	1674	Coro::State::transfer = 1
913	int flags	1675	Coro::schedule = 2
914	PROTOTYPE: @	1676	Coro::cede = 3
		1677	Coro::cede_notself = 4
915	CODE:	1678	CODE:
		1679	{
		1680	struct transfer_args ta;
		1681
916	PUTBACK;	1682	PUTBACK;
917	transfer (aTHX_ prev, next, flags);	1683	switch (ix)
		1684	{
		1685	case 0:
		1686	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1687	ta.next = 0;
		1688	break;
		1689
		1690	case 1:
		1691	if (items != 2)
		1692	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1693
		1694	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1695	break;
		1696
		1697	case 2:
		1698	prepare_schedule (aTHX_ &ta);
		1699	break;
		1700
		1701	case 3:
		1702	prepare_cede (aTHX_ &ta);
		1703	break;
		1704
		1705	case 4:
		1706	if (!prepare_cede_notself (aTHX_ &ta))
		1707	XSRETURN_EMPTY;
		1708
		1709	break;
		1710	}
918	SPAGAIN;	1711	SPAGAIN;
919		1712
		1713	BARRIER;
		1714	PUTBACK;
		1715	TRANSFER (ta, 0);
		1716	SPAGAIN; /* might be the sp of a different coroutine now */
		1717	/* be extra careful not to ever do anything after TRANSFER */
		1718	}
		1719
		1720	bool
		1721	_destroy (SV *coro_sv)
		1722	CODE:
		1723	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1724	OUTPUT:
		1725	RETVAL
		1726
920	void	1727	void
921	DESTROY(coro)	1728	_exit (int code)
922	Coro::State coro	1729	PROTOTYPE: $
923	CODE:	1730	CODE:
		1731	_exit (code);
924		1732
925	if (coro->mainstack && coro->mainstack != main_mainstack)	1733	int
		1734	cctx_stacksize (int new_stacksize = 0)
		1735	CODE:
		1736	RETVAL = coro_stacksize;
		1737	if (new_stacksize)
		1738	coro_stacksize = new_stacksize;
		1739	OUTPUT:
		1740	RETVAL
		1741
		1742	int
		1743	cctx_count ()
		1744	CODE:
		1745	RETVAL = cctx_count;
		1746	OUTPUT:
		1747	RETVAL
		1748
		1749	int
		1750	cctx_idle ()
		1751	CODE:
		1752	RETVAL = cctx_idle;
		1753	OUTPUT:
		1754	RETVAL
		1755
		1756	void
		1757	list ()
		1758	PPCODE:
		1759	{
		1760	struct coro *coro;
		1761	for (coro = coro_first; coro; coro = coro->next)
		1762	if (coro->hv)
		1763	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1764	}
		1765
		1766	void
		1767	call (Coro::State coro, SV *coderef)
		1768	ALIAS:
		1769	eval = 1
		1770	CODE:
		1771	{
		1772	if (coro->mainstack)
926	{	1773	{
927	struct coro temp;	1774	struct coro temp;
928		1775
		1776	if (!(coro->flags & CF_RUNNING))
		1777	{
		1778	PUTBACK;
		1779	save_perl (aTHX_ &temp);
		1780	load_perl (aTHX_ coro);
		1781	}
		1782
		1783	{
		1784	dSP;
		1785	ENTER;
		1786	SAVETMPS;
929	PUTBACK;	1787	PUTBACK;
930	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1788	PUSHSTACK;
931	LOAD(aTHX_ coro);	1789	PUSHMARK (SP);
		1790
		1791	if (ix)
		1792	eval_sv (coderef, 0);
		1793	else
		1794	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1795
		1796	POPSTACK;
932	SPAGAIN;	1797	SPAGAIN;
		1798	FREETMPS;
		1799	LEAVE;
		1800	PUTBACK;
		1801	}
933		1802
934	destroy_stacks (aTHX);	1803	if (!(coro->flags & CF_RUNNING))
935		1804	{
936	LOAD((&temp)); /* this will get rid of defsv etc.. */	1805	save_perl (aTHX_ coro);
		1806	load_perl (aTHX_ &temp);
937	SPAGAIN;	1807	SPAGAIN;
938		1808	}
939	coro->mainstack = 0;
940	}	1809	}
		1810	}
941		1811
942	deallocate_stack (coro);	1812	SV *
943		1813	is_ready (Coro::State coro)
944	Safefree (coro);	1814	PROTOTYPE: $
		1815	ALIAS:
		1816	is_ready = CF_READY
		1817	is_running = CF_RUNNING
		1818	is_new = CF_NEW
		1819	is_destroyed = CF_DESTROYED
		1820	CODE:
		1821	RETVAL = boolSV (coro->flags & ix);
		1822	OUTPUT:
		1823	RETVAL
945		1824
946	void	1825	void
947	flush()	1826	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
948	CODE:
949	#ifdef MAY_FLUSH
950	flush_padlist_cache ();
951	#endif
952		1827
953	void	1828	SV *
954	_exit(code)	1829	has_cctx (Coro::State coro)
955	int code
956	PROTOTYPE: $	1830	PROTOTYPE: $
957	CODE:	1831	CODE:
958	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE	1832	RETVAL = boolSV (!!coro->cctx);
959	_exit (code);	1833	OUTPUT:
960	#else	1834	RETVAL
961	signal (SIGTERM, SIG_DFL);
962	raise (SIGTERM);
963	exit (code);
964	#endif
965		1835
966	MODULE = Coro::State PACKAGE = Coro::Cont	1836	int
		1837	is_traced (Coro::State coro)
		1838	PROTOTYPE: $
		1839	CODE:
		1840	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1841	OUTPUT:
		1842	RETVAL
967		1843
968	# this is slightly dirty (should expose a c-level api)	1844	IV
		1845	rss (Coro::State coro)
		1846	PROTOTYPE: $
		1847	ALIAS:
		1848	usecount = 1
		1849	CODE:
		1850	switch (ix)
		1851	{
		1852	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1853	case 1: RETVAL = coro->usecount; break;
		1854	}
		1855	OUTPUT:
		1856	RETVAL
969		1857
970	void	1858	void
971	yield(...)	1859	force_cctx ()
972	PROTOTYPE: @	1860	CODE:
973	CODE:	1861	struct coro *coro = SvSTATE (coro_current);
974	static SV *returnstk;	1862	coro->cctx->idle_sp = 0;
975	SV *sv;
976	AV *defav = GvAV (PL_defgv);
977	struct coro prev, next;
978
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		1863
996	MODULE = Coro::State PACKAGE = Coro	1864	MODULE = Coro::State PACKAGE = Coro
997		1865
998	# this is slightly dirty (should expose a c-level api)
999
1000	BOOT:	1866	BOOT:
1001	{	1867	{
1002	int i;	1868	int i;
		1869
		1870	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1871	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1872	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1873
		1874	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1875	SvREADONLY_on (coro_current);
		1876
1003	HV *stash = gv_stashpv ("Coro", TRUE);	1877	coro_stash = gv_stashpv ("Coro", TRUE);
1004		1878
1005	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1879	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1006	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1880	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1007	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1881	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1008	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1882	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1009	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1883	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1010	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1884	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		1885
1015	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1886	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1016	coro_ready[i] = newAV ();	1887	coro_ready[i] = newAV ();
1017		1888
1018	{	1889	{
1019	SV *sv = perl_get_sv("Coro::API", 1);	1890	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1891	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1020		1892
1021	coroapi.schedule = api_schedule;	1893	coroapi.schedule = api_schedule;
		1894	coroapi.cede = api_cede;
		1895	coroapi.cede_notself = api_cede_notself;
1022	coroapi.ready = api_ready;	1896	coroapi.ready = api_ready;
		1897	coroapi.is_ready = api_is_ready;
1023	coroapi.nready = &coro_nready;	1898	coroapi.nready = &coro_nready;
1024	coroapi.current = coro_current;	1899	coroapi.current = coro_current;
1025		1900
1026	GCoroAPI = &coroapi;	1901	GCoroAPI = &coroapi;
1027	sv_setiv(sv, (IV)&coroapi);	1902	sv_setiv (sv, (IV)&coroapi);
1028	SvREADONLY_on(sv);	1903	SvREADONLY_on (sv);
1029	}	1904	}
1030	}	1905	}
1031		1906
1032	void	1907	void
1033	ready(self)	1908	_set_current (SV *current)
1034	SV * self	1909	PROTOTYPE: $
1035	CODE:	1910	CODE:
1036	api_ready (self);	1911	SvREFCNT_dec (SvRV (coro_current));
		1912	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1913
		1914	void
		1915	_set_readyhook (SV *hook)
		1916	PROTOTYPE: $
		1917	CODE:
		1918	LOCK;
		1919	SvREFCNT_dec (coro_readyhook);
		1920	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1921	UNLOCK;
1037		1922
1038	int	1923	int
		1924	prio (Coro::State coro, int newprio = 0)
		1925	ALIAS:
		1926	nice = 1
		1927	CODE:
		1928	{
		1929	RETVAL = coro->prio;
		1930
		1931	if (items > 1)
		1932	{
		1933	if (ix)
		1934	newprio = coro->prio - newprio;
		1935
		1936	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1937	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1938
		1939	coro->prio = newprio;
		1940	}
		1941	}
		1942	OUTPUT:
		1943	RETVAL
		1944
		1945	SV *
		1946	ready (SV *self)
		1947	PROTOTYPE: $
		1948	CODE:
		1949	RETVAL = boolSV (api_ready (self));
		1950	OUTPUT:
		1951	RETVAL
		1952
		1953	int
1039	nready(...)	1954	nready (...)
1040	PROTOTYPE:	1955	PROTOTYPE:
1041	CODE:	1956	CODE:
1042	RETVAL = coro_nready;	1957	RETVAL = coro_nready;
1043	OUTPUT:	1958	OUTPUT:
1044	RETVAL	1959	RETVAL
1045		1960
1046	void	1961	void
1047	schedule(...)	1962	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1963	PROTOTYPE: $;$
		1964	CODE:
		1965	SvREFCNT_dec (self->throw);
		1966	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1967
		1968	void
		1969	swap_defsv (Coro::State self)
1048	PROTOTYPE:	1970	PROTOTYPE: $
1049	ALIAS:	1971	ALIAS:
1050	cede = 1	1972	swap_defav = 1
		1973	CODE:
		1974	if (!self->slot)
		1975	croak ("cannot swap state with coroutine that has no saved state");
		1976	else
		1977	{
		1978	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1979	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
		1980
		1981	SV tmp = src; src = dst; *dst = tmp;
		1982	}
		1983
		1984	# for async_pool speedup
		1985	void
		1986	_pool_1 (SV *cb)
1051	CODE:	1987	CODE:
1052	api_schedule (ix);	1988	{
		1989	struct coro *coro = SvSTATE (coro_current);
		1990	HV hv = (HV )SvRV (coro_current);
		1991	AV *defav = GvAV (PL_defgv);
		1992	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1993	AV *invoke_av;
		1994	int i, len;
1053		1995
		1996	if (!invoke)
		1997	{
		1998	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1999	croak ("\3async_pool terminate\2\n");
		2000	}
		2001
		2002	SvREFCNT_dec (coro->saved_deffh);
		2003	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2004
		2005	hv_store (hv, "desc", sizeof ("desc") - 1,
		2006	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2007
		2008	invoke_av = (AV *)SvRV (invoke);
		2009	len = av_len (invoke_av);
		2010
		2011	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2012
		2013	if (len > 0)
		2014	{
		2015	av_fill (defav, len - 1);
		2016	for (i = 0; i < len; ++i)
		2017	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2018	}
		2019
		2020	SvREFCNT_dec (invoke);
		2021	}
		2022
		2023	void
		2024	_pool_2 (SV *cb)
		2025	CODE:
		2026	{
		2027	struct coro *coro = SvSTATE (coro_current);
		2028
		2029	sv_setsv (cb, &PL_sv_undef);
		2030
		2031	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		2032	coro->saved_deffh = 0;
		2033
		2034	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2035	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2036	{
		2037	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		2038	croak ("\3async_pool terminate\2\n");
		2039	}
		2040
		2041	av_clear (GvAV (PL_defgv));
		2042	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2043	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2044
		2045	coro->prio = 0;
		2046
		2047	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2048	api_trace (coro_current, 0);
		2049
		2050	av_push (av_async_pool, newSVsv (coro_current));
		2051	}
		2052
		2053
		2054	MODULE = Coro::State PACKAGE = Coro::AIO
		2055
		2056	SV *
		2057	_get_state ()
		2058	CODE:
		2059	{
		2060	struct io_state *data;
		2061
		2062	RETVAL = newSV (sizeof (struct io_state));
		2063	data = (struct io_state *)SvPVX (RETVAL);
		2064	SvCUR_set (RETVAL, sizeof (struct io_state));
		2065	SvPOK_only (RETVAL);
		2066
		2067	data->errorno = errno;
		2068	data->laststype = PL_laststype;
		2069	data->laststatval = PL_laststatval;
		2070	data->statcache = PL_statcache;
		2071	}
		2072	OUTPUT:
		2073	RETVAL
		2074
		2075	void
		2076	_set_state (char *data_)
		2077	PROTOTYPE: $
		2078	CODE:
		2079	{
		2080	struct io_state data = (void )data_;
		2081
		2082	errno = data->errorno;
		2083	PL_laststype = data->laststype;
		2084	PL_laststatval = data->laststatval;
		2085	PL_statcache = data->statcache;
		2086	}
		2087
		2088
		2089	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2090
		2091	BOOT:
		2092	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2093
		2094	SV *
		2095	_schedule (...)
		2096	PROTOTYPE: @
		2097	CODE:
		2098	{
		2099	static int incede;
		2100
		2101	api_cede_notself ();
		2102
		2103	++incede;
		2104	while (coro_nready >= incede && api_cede ())
		2105	;
		2106
		2107	sv_setsv (sv_activity, &PL_sv_undef);
		2108	if (coro_nready >= incede)
		2109	{
		2110	PUSHMARK (SP);
		2111	PUTBACK;
		2112	call_pv ("Coro::AnyEvent::_activity", G_DISCARD \| G_EVAL);
		2113	SPAGAIN;
		2114	}
		2115
		2116	--incede;
		2117	}
		2118

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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 1.238 by root, Sat May 31 12:10:55 2008 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 1.238 by root, Sat May 31 12:10:55 2008 UTC