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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.25 by root, Wed Aug 15 03:24:07 2001 UTC vs.
Revision 1.194 by root, Sat Oct 6 00:08:04 2007 UTC

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

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Comparing Coro/Coro/State.xs (file contents): Revision 1.25 by root, Wed Aug 15 03:24:07 2001 UTC vs. Revision 1.194 by root, Sat Oct 6 00:08:04 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.25 by root, Wed Aug 15 03:24:07 2001 UTC vs.
Revision 1.194 by root, Sat Oct 6 00:08:04 2007 UTC