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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC vs.
Revision 1.188 by root, Fri Oct 5 20:36:31 2007 UTC

…		…
1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	\|\| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
74	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
76	* and should be unique. */	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
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		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	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
79		97
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		99
82	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	103	#else
85	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
86	#endif	106	#endif
87		107
88	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
89		109
90	#include "CoroAPI.h"	110	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		111
94	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	116	#else
99	# define LOCK (void)0	117	# define LOCK (void)0
100	# define UNLOCK (void)0	118	# define UNLOCK (void)0
101	#endif	119	#endif
102		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
104	static AV main_mainstack; / used to differentiate between $main and others */	132	static AV main_mainstack; / used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
105	static HV coro_state_stash, coro_stash;	134	static HV coro_state_stash, coro_stash;
106	static SV coro_mortal; / will be freed after next transfer */	135	static SV coro_mortal; / will be freed after next transfer */
		136
		137	static GV irsgv; / $/ */
		138	static GV stdoutgv; / STDOUT */
		139
		140	/* async_pool helper stuff */
		141	static SV *sv_pool_rss;
		142	static SV *sv_pool_size;
		143	static AV *av_async_pool;
		144
		145	static struct coro_cctx *cctx_first;
		146	static int cctx_count, cctx_idle;
		147
		148	enum {
		149	CC_MAPPED = 0x01,
		150	CC_NOREUSE = 0x02, /* throw this away after tracing */
		151	CC_TRACE = 0x04,
		152	CC_TRACE_SUB = 0x08, /* trace sub calls */
		153	CC_TRACE_LINE = 0x10, /* trace each statement */
		154	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		155	};
107		156
108	/* this is a structure representing a c-level coroutine */	157	/* this is a structure representing a c-level coroutine */
109	typedef struct coro_cctx {	158	typedef struct coro_cctx {
110	struct coro_cctx *next;	159	struct coro_cctx *next;
111		160
112	/* the stack */	161	/* the stack */
113	void *sptr;	162	void *sptr;
114	long ssize; /* positive == mmap, otherwise malloc */	163	size_t ssize;
115		164
116	/* cpu state */	165	/* cpu state */
117	void idle_sp; / sp of top-level transfer/schedule/cede call */	166	void idle_sp; / sp of top-level transfer/schedule/cede call */
		167	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
118	JMPENV *top_env;	168	JMPENV *top_env;
119	coro_context cctx;	169	coro_context cctx;
120		170
121	#if USE_VALGRIND	171	#if CORO_USE_VALGRIND
122	int valgrind_id;	172	int valgrind_id;
123	#endif	173	#endif
		174	unsigned char flags;
124	} coro_cctx;	175	} coro_cctx;
		176
		177	enum {
		178	CF_RUNNING = 0x0001, /* coroutine is running */
		179	CF_READY = 0x0002, /* coroutine is ready */
		180	CF_NEW = 0x0004, /* has never been switched to */
		181	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		182	};
125		183
126	/* this is a structure representing a perl-level coroutine */	184	/* this is a structure representing a perl-level coroutine */
127	struct coro {	185	struct coro {
128	/* the c coroutine allocated to this perl coroutine, if any */	186	/* the c coroutine allocated to this perl coroutine, if any */
129	coro_cctx *cctx;	187	coro_cctx *cctx;
130		188
131	/* data associated with this coroutine (initial args) */	189	/* data associated with this coroutine (initial args) */
132	AV *args;	190	AV *args;
133	int refcnt;	191	int refcnt;
		192	int flags; /* CF_ flags */
134		193
135	/* optionally saved, might be zero */	194	/* optionally saved, might be zero */
136	AV *defav;	195	AV defav; / @_ */
137	SV *defsv;	196	SV defsv; / $_ */
138	SV *errsv;	197	SV errsv; / $@ */
		198	SV deffh; / default filehandle */
		199	SV irssv; / $/ */
		200	SV irssv_sv; / real $/ cache */
139		201
140	/* saved global state not related to stacks */	202	#define VAR(name,type) type name;
141	U8 dowarn;	203	# include "state.h"
142	I32 in_eval;	204	#undef VAR
143		205
144	/* the stacks and related info (callchain etc..) */	206	/* statistics */
145	PERL_SI *curstackinfo;	207	int usecount; /* number of transfers to this coro */
146	AV *curstack;
147	AV *mainstack;
148	SV **stack_sp;
149	OP *op;
150	SV **curpad;
151	AV *comppad;
152	CV *compcv;
153	SV **stack_base;
154	SV **stack_max;
155	SV **tmps_stack;
156	I32 tmps_floor;
157	I32 tmps_ix;
158	I32 tmps_max;
159	I32 *markstack;
160	I32 *markstack_ptr;
161	I32 *markstack_max;
162	I32 *scopestack;
163	I32 scopestack_ix;
164	I32 scopestack_max;
165	ANY *savestack;
166	I32 savestack_ix;
167	I32 savestack_max;
168	OP **retstack;
169	I32 retstack_ix;
170	I32 retstack_max;
171	PMOP *curpm;
172	COP *curcop;
173		208
174	/* coro process data */	209	/* coro process data */
175	int prio;	210	int prio;
		211	//SV *throw;
		212
		213	/* async_pool */
		214	SV *saved_deffh;
		215
		216	/* linked list */
		217	struct coro next, prev;
		218	HV hv; / the perl hash associated with this coro, if any */
176	};	219	};
177		220
178	typedef struct coro *Coro__State;	221	typedef struct coro *Coro__State;
179	typedef struct coro *Coro__State_or_hashref;	222	typedef struct coro *Coro__State_or_hashref;
180		223
		224	/ Coro ******************************************************************/
		225
		226	#define PRIO_MAX 3
		227	#define PRIO_HIGH 1
		228	#define PRIO_NORMAL 0
		229	#define PRIO_LOW -1
		230	#define PRIO_IDLE -3
		231	#define PRIO_MIN -4
		232
		233	/* for Coro.pm */
		234	static SV *coro_current;
		235	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		236	static int coro_nready;
		237	static struct coro *coro_first;
		238
		239	/ lowlevel stuff ********************************************************/
		240
181	static AV *	241	static AV *
182	coro_clone_padlist (CV *cv)	242	coro_clone_padlist (pTHX_ CV *cv)
183	{	243	{
184	AV *padlist = CvPADLIST (cv);	244	AV *padlist = CvPADLIST (cv);
185	AV newpadlist, newpad;	245	AV newpadlist, newpad;
186		246
187	newpadlist = newAV ();	247	newpadlist = newAV ();
…		…
199		259
200	return newpadlist;	260	return newpadlist;
201	}	261	}
202		262
203	static void	263	static void
204	free_padlist (AV *padlist)	264	free_padlist (pTHX_ AV *padlist)
205	{	265	{
206	/* may be during global destruction */	266	/* may be during global destruction */
207	if (SvREFCNT (padlist))	267	if (SvREFCNT (padlist))
208	{	268	{
209	I32 i = AvFILLp (padlist);	269	I32 i = AvFILLp (padlist);
…		…
230	AV *padlist;	290	AV *padlist;
231	AV av = (AV )mg->mg_obj;	291	AV av = (AV )mg->mg_obj;
232		292
233	/* casting is fun. */	293	/* casting is fun. */
234	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	294	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
235	free_padlist (padlist);	295	free_padlist (aTHX_ padlist);
236		296
237	SvREFCNT_dec (av);	297	SvREFCNT_dec (av);
238		298
239	return 0;	299	return 0;
240	}	300	}
241		301
242	#define PERL_MAGIC_coro PERL_MAGIC_ext	302	#define PERL_MAGIC_coro PERL_MAGIC_ext
243		303
244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	304	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
245		305
		306	#define CORO_MAGIC(cv) \
		307	SvMAGIC (cv) \
		308	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		309	? SvMAGIC (cv) \
		310	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		311	: 0
		312
		313	static struct coro *
		314	SvSTATE_ (pTHX_ SV *coro)
		315	{
		316	HV *stash;
		317	MAGIC *mg;
		318
		319	if (SvROK (coro))
		320	coro = SvRV (coro);
		321
		322	if (SvTYPE (coro) != SVt_PVHV)
		323	croak ("Coro::State object required");
		324
		325	stash = SvSTASH (coro);
		326	if (stash != coro_stash && stash != coro_state_stash)
		327	{
		328	/* very slow, but rare, check */
		329	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		330	croak ("Coro::State object required");
		331	}
		332
		333	mg = CORO_MAGIC (coro);
		334	return (struct coro *)mg->mg_ptr;
		335	}
		336
		337	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		338
246	/* the next two functions merely cache the padlists */	339	/* the next two functions merely cache the padlists */
247	static void	340	static void
248	get_padlist (CV *cv)	341	get_padlist (pTHX_ CV *cv)
249	{	342	{
250	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	343	MAGIC *mg = CORO_MAGIC (cv);
		344	AV *av;
251		345
252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	346	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
253	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	347	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
254	else	348	else
255	{	349	{
256	#if 0	350	#if CORO_PREFER_PERL_FUNCTIONS
257	/* this is probably cleaner, but also slower? */	351	/* this is probably cleaner, but also slower? */
258	CV *cp = Perl_cv_clone (cv);	352	CV *cp = Perl_cv_clone (cv);
259	CvPADLIST (cv) = CvPADLIST (cp);	353	CvPADLIST (cv) = CvPADLIST (cp);
260	CvPADLIST (cp) = 0;	354	CvPADLIST (cp) = 0;
261	SvREFCNT_dec (cp);	355	SvREFCNT_dec (cp);
262	#else	356	#else
263	CvPADLIST (cv) = coro_clone_padlist (cv);	357	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
264	#endif	358	#endif
265	}	359	}
266	}	360	}
267		361
268	static void	362	static void
269	put_padlist (CV *cv)	363	put_padlist (pTHX_ CV *cv)
270	{	364	{
271	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	365	MAGIC *mg = CORO_MAGIC (cv);
		366	AV *av;
272		367
273	if (!mg)	368	if (!mg)
274	{	369	{
275	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	370	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	371	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277	mg->mg_virtual = &vtbl_coro;	372	mg->mg_virtual = &vtbl_coro;
278	mg->mg_obj = (SV *)newAV ();	373	mg->mg_obj = (SV *)newAV ();
279	}	374	}
280		375
281	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	376	av = (AV *)mg->mg_obj;
282	}
283		377
284	#define SB do {	378	if (AvFILLp (av) >= AvMAX (av))
285	#define SE } while (0)	379	av_extend (av, AvMAX (av) + 1);
286		380
287	#define LOAD(state) load_state((state));	381	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
288	#define SAVE(state,flags) save_state((state),(flags));	382	}
289		383
290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	384	/ load & save, init *****************************************************/
291		385
292	static void	386	static void
293	load_state(Coro__State c)	387	load_perl (pTHX_ Coro__State c)
294	{	388	{
295	PL_dowarn = c->dowarn;	389	#define VAR(name,type) PL_ ## name = c->name;
296	PL_in_eval = c->in_eval;	390	# include "state.h"
		391	#undef VAR
297		392
298	PL_curstackinfo = c->curstackinfo;	393	GvSV (PL_defgv) = c->defsv;
299	PL_curstack = c->curstack;	394	GvAV (PL_defgv) = c->defav;
300	PL_mainstack = c->mainstack;	395	GvSV (PL_errgv) = c->errsv;
301	PL_stack_sp = c->stack_sp;	396	GvSV (irsgv) = c->irssv_sv;
302	PL_op = c->op;
303	PL_curpad = c->curpad;
304	PL_comppad = c->comppad;
305	PL_compcv = c->compcv;
306	PL_stack_base = c->stack_base;
307	PL_stack_max = c->stack_max;
308	PL_tmps_stack = c->tmps_stack;
309	PL_tmps_floor = c->tmps_floor;
310	PL_tmps_ix = c->tmps_ix;
311	PL_tmps_max = c->tmps_max;
312	PL_markstack = c->markstack;
313	PL_markstack_ptr = c->markstack_ptr;
314	PL_markstack_max = c->markstack_max;
315	PL_scopestack = c->scopestack;
316	PL_scopestack_ix = c->scopestack_ix;
317	PL_scopestack_max = c->scopestack_max;
318	PL_savestack = c->savestack;
319	PL_savestack_ix = c->savestack_ix;
320	PL_savestack_max = c->savestack_max;
321	#if !PERL_VERSION_ATLEAST (5,9,0)
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	#endif
326	PL_curpm = c->curpm;
327	PL_curcop = c->curcop;
328
329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
331	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
332		397
333	{	398	{
334	dSP;	399	dSP;
335	CV *cv;	400	CV *cv;
336		401
337	/* now do the ugly restore mess */	402	/* now do the ugly restore mess */
338	while ((cv = (CV *)POPs))	403	while ((cv = (CV *)POPs))
339	{	404	{
340	AV padlist = (AV )POPs;
341
342	if (padlist)
343	{
344	put_padlist (cv); /* mark this padlist as available */	405	put_padlist (aTHX_ cv); /* mark this padlist as available */
345	CvPADLIST(cv) = padlist;	406	CvDEPTH (cv) = PTR2IV (POPs);
346	}	407	CvPADLIST (cv) = (AV *)POPs;
347
348	++CvDEPTH(cv);
349	}	408	}
350		409
351	PUTBACK;	410	PUTBACK;
352	}	411	}
353	}	412	}
354		413
355	static void	414	static void
356	save_state(Coro__State c, int flags)	415	save_perl (pTHX_ Coro__State c)
357	{	416	{
358	{	417	{
359	dSP;	418	dSP;
360	I32 cxix = cxstack_ix;	419	I32 cxix = cxstack_ix;
361	PERL_CONTEXT *ccstk = cxstack;	420	PERL_CONTEXT *ccstk = cxstack;
…		…
364	/*	423	/*
365	* the worst thing you can imagine happens first - we have to save	424	* the worst thing you can imagine happens first - we have to save
366	* (and reinitialize) all cv's in the whole callchain :(	425	* (and reinitialize) all cv's in the whole callchain :(
367	*/	426	*/
368		427
369	PUSHs (Nullsv);	428	XPUSHs (Nullsv);
370	/* this loop was inspired by pp_caller */	429	/* this loop was inspired by pp_caller */
371	for (;;)	430	for (;;)
372	{	431	{
373	while (cxix >= 0)	432	while (cxix >= 0)
374	{	433	{
375	PERL_CONTEXT *cx = &ccstk[cxix--];	434	PERL_CONTEXT *cx = &ccstk[cxix--];
376		435
377	if (CxTYPE(cx) == CXt_SUB)	436	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
378	{	437	{
379	CV *cv = cx->blk_sub.cv;	438	CV *cv = cx->blk_sub.cv;
		439
380	if (CvDEPTH(cv))	440	if (CvDEPTH (cv))
381	{	441	{
382	EXTEND (SP, CvDEPTH(cv)*2);	442	EXTEND (SP, 3);
383
384	while (--CvDEPTH(cv))
385	{
386	/* this tells the restore code to increment CvDEPTH */
387	PUSHs (Nullsv);
388	PUSHs ((SV *)cv);
389	}
390
391	PUSHs ((SV *)CvPADLIST(cv));	443	PUSHs ((SV *)CvPADLIST (cv));
		444	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
392	PUSHs ((SV *)cv);	445	PUSHs ((SV *)cv);
393		446
		447	CvDEPTH (cv) = 0;
394	get_padlist (cv);	448	get_padlist (aTHX_ cv);
395	}	449	}
396	}	450	}
397	#ifdef CXt_FORMAT
398	else if (CxTYPE(cx) == CXt_FORMAT)
399	{
400	/* I never used formats, so how should I know how these are implemented? */
401	/* my bold guess is as a simple, plain sub... */
402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403	}
404	#endif
405	}	451	}
406		452
407	if (top_si->si_type == PERLSI_MAIN)	453	if (top_si->si_type == PERLSI_MAIN)
408	break;	454	break;
409		455
410	top_si = top_si->si_prev;	456	top_si = top_si->si_prev;
411	ccstk = top_si->si_cxstack;	457	ccstk = top_si->si_cxstack;
412	cxix = top_si->si_cxix;	458	cxix = top_si->si_cxix;
413	}	459	}
414		460
415	PUTBACK;	461	PUTBACK;
416	}	462	}
417		463
418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	464	c->defav = GvAV (PL_defgv);
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	465	c->defsv = DEFSV;
420	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	466	c->errsv = ERRSV;
		467	c->irssv_sv = GvSV (irsgv);
421		468
422	c->dowarn = PL_dowarn;	469	#define VAR(name,type)c->name = PL_ ## name;
423	c->in_eval = PL_in_eval;	470	# include "state.h"
424		471	#undef VAR
425	c->curstackinfo = PL_curstackinfo;
426	c->curstack = PL_curstack;
427	c->mainstack = PL_mainstack;
428	c->stack_sp = PL_stack_sp;
429	c->op = PL_op;
430	c->curpad = PL_curpad;
431	c->comppad = PL_comppad;
432	c->compcv = PL_compcv;
433	c->stack_base = PL_stack_base;
434	c->stack_max = PL_stack_max;
435	c->tmps_stack = PL_tmps_stack;
436	c->tmps_floor = PL_tmps_floor;
437	c->tmps_ix = PL_tmps_ix;
438	c->tmps_max = PL_tmps_max;
439	c->markstack = PL_markstack;
440	c->markstack_ptr = PL_markstack_ptr;
441	c->markstack_max = PL_markstack_max;
442	c->scopestack = PL_scopestack;
443	c->scopestack_ix = PL_scopestack_ix;
444	c->scopestack_max = PL_scopestack_max;
445	c->savestack = PL_savestack;
446	c->savestack_ix = PL_savestack_ix;
447	c->savestack_max = PL_savestack_max;
448	#if !PERL_VERSION_ATLEAST (5,9,0)
449	c->retstack = PL_retstack;
450	c->retstack_ix = PL_retstack_ix;
451	c->retstack_max = PL_retstack_max;
452	#endif
453	c->curpm = PL_curpm;
454	c->curcop = PL_curcop;
455	}	472	}
456		473
457	/*	474	/*
458	* allocate various perl stacks. This is an exact copy	475	* allocate various perl stacks. This is an exact copy
459	* of perl.c:init_stacks, except that it uses less memory	476	* of perl.c:init_stacks, except that it uses less memory
460	* on the (sometimes correct) assumption that coroutines do	477	* on the (sometimes correct) assumption that coroutines do
461	* not usually need a lot of stackspace.	478	* not usually need a lot of stackspace.
462	*/	479	*/
		480	#if CORO_PREFER_PERL_FUNCTIONS
		481	# define coro_init_stacks init_stacks
		482	#else
463	static void	483	static void
464	coro_init_stacks ()	484	coro_init_stacks (pTHX)
465	{	485	{
466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	486	PL_curstackinfo = new_stackinfo(64, 6);
467	PL_curstackinfo->si_type = PERLSI_MAIN;	487	PL_curstackinfo->si_type = PERLSI_MAIN;
468	PL_curstack = PL_curstackinfo->si_stack;	488	PL_curstack = PL_curstackinfo->si_stack;
469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
470		490
471	PL_stack_base = AvARRAY(PL_curstack);	491	PL_stack_base = AvARRAY(PL_curstack);
472	PL_stack_sp = PL_stack_base;	492	PL_stack_sp = PL_stack_base;
473	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
474		494
475	New(50,PL_tmps_stack,96,SV*);	495	New(50,PL_tmps_stack,64,SV*);
476	PL_tmps_floor = -1;	496	PL_tmps_floor = -1;
477	PL_tmps_ix = -1;	497	PL_tmps_ix = -1;
478	PL_tmps_max = 96;	498	PL_tmps_max = 64;
479		499
480	New(54,PL_markstack,16,I32);	500	New(54,PL_markstack,16,I32);
481	PL_markstack_ptr = PL_markstack;	501	PL_markstack_ptr = PL_markstack;
482	PL_markstack_max = PL_markstack + 16;	502	PL_markstack_max = PL_markstack + 16;
483		503
…		…
487		507
488	New(54,PL_scopestack,16,I32);	508	New(54,PL_scopestack,16,I32);
489	PL_scopestack_ix = 0;	509	PL_scopestack_ix = 0;
490	PL_scopestack_max = 16;	510	PL_scopestack_max = 16;
491		511
492	New(54,PL_savestack,96,ANY);	512	New(54,PL_savestack,64,ANY);
493	PL_savestack_ix = 0;	513	PL_savestack_ix = 0;
494	PL_savestack_max = 96;	514	PL_savestack_max = 64;
495		515
496	#if !PERL_VERSION_ATLEAST (5,9,0)	516	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	517	New(54,PL_retstack,4,OP*);
498	PL_retstack_ix = 0;	518	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	519	PL_retstack_max = 4;
500	#endif	520	#endif
501	}	521	}
		522	#endif
502		523
503	/*	524	/*
504	* destroy the stacks, the callchain etc...	525	* destroy the stacks, the callchain etc...
505	*/	526	*/
506	static void	527	static void
507	coro_destroy_stacks ()	528	coro_destroy_stacks (pTHX)
508	{	529	{
509	if (!IN_DESTRUCT)
510	{
511	/* is this ugly, I ask? */
512	LEAVE_SCOPE (0);
513
514	/* sure it is, but more important: is it correct?? :/ */
515	FREETMPS;
516
517	/POPSTACK_TO (PL_mainstack);//D//use/
518	}
519
520	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
521	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
522		532
523	while (PL_curstackinfo)	533	while (PL_curstackinfo)
524	{	534	{
525	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
526		536
527	{ /D//remove/
528	dSP;
529	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
530	PUTBACK; /* possibly superfluous */
531	}
532
533	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
534	{
535	dounwind (-1);/D//remove/
536	SvREFCNT_dec (PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
537	}
538		539
539	Safefree (PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
540	Safefree (PL_curstackinfo);	541	Safefree (PL_curstackinfo);
541	PL_curstackinfo = p;	542	PL_curstackinfo = p;
542	}	543	}
…		…
548	#if !PERL_VERSION_ATLEAST (5,9,0)	549	#if !PERL_VERSION_ATLEAST (5,9,0)
549	Safefree (PL_retstack);	550	Safefree (PL_retstack);
550	#endif	551	#endif
551	}	552	}
552		553
553	static void	554	static size_t
554	setup_coro (struct coro *coro)	555	coro_rss (pTHX_ struct coro *coro)
		556	{
		557	size_t rss = sizeof (*coro);
		558
		559	if (coro->mainstack)
		560	{
		561	if (coro->flags & CF_RUNNING)
		562	{
		563	#define VAR(name,type)coro->name = PL_ ## name;
		564	# include "state.h"
		565	#undef VAR
		566	}
		567
		568	rss += sizeof (coro->curstackinfo);
		569	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		570	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		571	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		572	rss += coro->tmps_max * sizeof (SV *);
		573	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		574	rss += coro->scopestack_max * sizeof (I32);
		575	rss += coro->savestack_max * sizeof (ANY);
		576
		577	#if !PERL_VERSION_ATLEAST (5,9,0)
		578	rss += coro->retstack_max * sizeof (OP *);
		579	#endif
		580	}
		581
		582	return rss;
		583	}
		584
		585	/ coroutine stack handling **********************************************/
		586
		587	static void
		588	coro_setup (pTHX_ struct coro *coro)
555	{	589	{
556	/*	590	/*
557	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
558	*/	592	*/
559
560	coro_init_stacks ();	593	coro_init_stacks (aTHX);
561		594
		595	PL_runops = RUNOPS_DEFAULT;
		596	PL_curcop = &PL_compiling;
		597	PL_in_eval = EVAL_NULL;
562	PL_curcop = 0;	598	PL_comppad = 0;
563	PL_in_eval = 0;
564	PL_curpm = 0;	599	PL_curpm = 0;
		600	PL_localizing = 0;
		601	PL_dirty = 0;
		602	PL_restartop = 0;
		603
		604	GvSV (PL_defgv) = NEWSV (0, 0);
		605	GvAV (PL_defgv) = coro->args; coro->args = 0;
		606	GvSV (PL_errgv) = NEWSV (0, 0);
		607	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		608	PL_rs = newSVsv (GvSV (irsgv));
		609	PL_defoutgv = SvREFCNT_inc (stdoutgv);
565		610
566	{	611	{
567	dSP;	612	dSP;
568	LOGOP myop;	613	LOGOP myop;
569		614
570	/* I have no idea why this is needed, but it is */
571	PUSHMARK (SP);
572
573	SvREFCNT_dec (GvAV (PL_defgv));
574	GvAV (PL_defgv) = coro->args; coro->args = 0;
575
576	Zero (&myop, 1, LOGOP);	615	Zero (&myop, 1, LOGOP);
577	myop.op_next = Nullop;	616	myop.op_next = Nullop;
578	myop.op_flags = OPf_WANT_VOID;	617	myop.op_flags = OPf_WANT_VOID;
579		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
580	PL_op = (OP *)&myop;	622	PL_op = (OP *)&myop;
581
582	PUSHMARK (SP);
583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
584	PUTBACK;
585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
586	SPAGAIN;	624	SPAGAIN;
587
588	ENTER; /* necessary e.g. for dounwind */
589	}	625	}
590	}
591		626
		627	ENTER; /* necessary e.g. for dounwind */
		628	}
		629
592	static void	630	static void
		631	coro_destroy (pTHX_ struct coro *coro)
		632	{
		633	if (!IN_DESTRUCT)
		634	{
		635	/* restore all saved variables and stuff */
		636	LEAVE_SCOPE (0);
		637	assert (PL_tmps_floor == -1);
		638
		639	/* free all temporaries */
		640	FREETMPS;
		641	assert (PL_tmps_ix == -1);
		642
		643	/* unwind all extra stacks */
		644	POPSTACK_TO (PL_mainstack);
		645
		646	/* unwind main stack */
		647	dounwind (-1);
		648	}
		649
		650	SvREFCNT_dec (GvSV (PL_defgv));
		651	SvREFCNT_dec (GvAV (PL_defgv));
		652	SvREFCNT_dec (GvSV (PL_errgv));
		653	SvREFCNT_dec (PL_defoutgv);
		654	SvREFCNT_dec (PL_rs);
		655	SvREFCNT_dec (GvSV (irsgv));
		656
		657	SvREFCNT_dec (coro->saved_deffh);
		658	//SvREFCNT_dec (coro->throw);
		659
		660	coro_destroy_stacks (aTHX);
		661	}
		662
		663	static void
593	free_coro_mortal ()	664	free_coro_mortal (pTHX)
594	{	665	{
595	if (coro_mortal)	666	if (coro_mortal)
596	{	667	{
597	SvREFCNT_dec (coro_mortal);	668	SvREFCNT_dec (coro_mortal);
598	coro_mortal = 0;	669	coro_mortal = 0;
599	}	670	}
600	}	671	}
601		672
		673	static int
		674	runops_trace (pTHX)
		675	{
		676	COP *oldcop = 0;
		677	int oldcxix = -2;
		678	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		679	coro_cctx *cctx = coro->cctx;
		680
		681	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		682	{
		683	PERL_ASYNC_CHECK ();
		684
		685	if (cctx->flags & CC_TRACE_ALL)
		686	{
		687	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		688	{
		689	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		690	SV bot, top;
		691	AV av = newAV (); / return values */
		692	SV **cb;
		693	dSP;
		694
		695	GV *gv = CvGV (cx->blk_sub.cv);
		696	SV *fullname = sv_2mortal (newSV (0));
		697	if (isGV (gv))
		698	gv_efullname3 (fullname, gv, 0);
		699
		700	bot = PL_stack_base + cx->blk_oldsp + 1;
		701	top = cx->blk_gimme == G_ARRAY ? SP + 1
		702	: cx->blk_gimme == G_SCALAR ? bot + 1
		703	: bot;
		704
		705	while (bot < top)
		706	av_push (av, SvREFCNT_inc (*bot++));
		707
		708	PL_runops = RUNOPS_DEFAULT;
		709	ENTER;
		710	SAVETMPS;
		711	EXTEND (SP, 3);
		712	PUSHMARK (SP);
		713	PUSHs (&PL_sv_no);
		714	PUSHs (fullname);
		715	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		716	PUTBACK;
		717	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		718	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		719	SPAGAIN;
		720	FREETMPS;
		721	LEAVE;
		722	PL_runops = runops_trace;
		723	}
		724
		725	if (oldcop != PL_curcop)
		726	{
		727	oldcop = PL_curcop;
		728
		729	if (PL_curcop != &PL_compiling)
		730	{
		731	SV **cb;
		732
		733	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		734	{
		735	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		736
		737	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		738	{
		739	runops_proc_t old_runops = PL_runops;
		740	dSP;
		741	GV *gv = CvGV (cx->blk_sub.cv);
		742	SV *fullname = sv_2mortal (newSV (0));
		743
		744	if (isGV (gv))
		745	gv_efullname3 (fullname, gv, 0);
		746
		747	PL_runops = RUNOPS_DEFAULT;
		748	ENTER;
		749	SAVETMPS;
		750	EXTEND (SP, 3);
		751	PUSHMARK (SP);
		752	PUSHs (&PL_sv_yes);
		753	PUSHs (fullname);
		754	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		755	PUTBACK;
		756	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		757	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		758	SPAGAIN;
		759	FREETMPS;
		760	LEAVE;
		761	PL_runops = runops_trace;
		762	}
		763
		764	oldcxix = cxstack_ix;
		765	}
		766
		767	if (cctx->flags & CC_TRACE_LINE)
		768	{
		769	dSP;
		770
		771	PL_runops = RUNOPS_DEFAULT;
		772	ENTER;
		773	SAVETMPS;
		774	EXTEND (SP, 3);
		775	PL_runops = RUNOPS_DEFAULT;
		776	PUSHMARK (SP);
		777	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		778	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		779	PUTBACK;
		780	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		781	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		782	SPAGAIN;
		783	FREETMPS;
		784	LEAVE;
		785	PL_runops = runops_trace;
		786	}
		787	}
		788	}
		789	}
		790	}
		791
		792	TAINT_NOT;
		793	return 0;
		794	}
		795
		796	/* inject a fake call to Coro::State::_cctx_init into the execution */
		797	/* _cctx_init should be careful, as it could be called at almost any time */
		798	/* during execution of a perl program */
602	static void NOINLINE	799	static void NOINLINE
603	prepare_cctx (coro_cctx *cctx)	800	prepare_cctx (pTHX_ coro_cctx *cctx)
604	{	801	{
605	dSP;	802	dSP;
606	LOGOP myop;	803	LOGOP myop;
607		804
		805	PL_top_env = &PL_start_env;
		806
		807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
		809
608	Zero (&myop, 1, LOGOP);	810	Zero (&myop, 1, LOGOP);
609	myop.op_next = PL_op;	811	myop.op_next = PL_op;
610	myop.op_flags = OPf_WANT_VOID;	812	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
611
612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613		813
614	PUSHMARK (SP);	814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
616	PUTBACK;	818	PUTBACK;
		819	PL_op = (OP *)&myop;
617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
618	SPAGAIN;	821	SPAGAIN;
619	}	822	}
620		823
		824	/*
		825	* this is a _very_ stripped down perl interpreter ;)
		826	*/
621	static void	827	static void
622	coro_run (void *arg)	828	coro_run (void *arg)
623	{	829	{
		830	dTHX;
		831
624	/* coro_run is the alternative epilogue of transfer() */	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
625	UNLOCK;	833	UNLOCK;
626		834
		835	/* we now skip the entersub that lead to transfer() */
		836	PL_op = PL_op->op_next;
		837
		838	/* inject a fake subroutine call to cctx_init */
		839	prepare_cctx (aTHX_ (coro_cctx *)arg);
		840
		841	/* somebody or something will hit me for both perl_run and PL_restartop */
		842	PL_restartop = PL_op;
		843	perl_run (PL_curinterp);
		844
627	/*	845	/*
628	* this is a _very_ stripped down perl interpreter ;)	846	* If perl-run returns we assume exit() was being called or the coro
		847	* fell off the end, which seems to be the only valid (non-bug)
		848	* reason for perl_run to return. We try to exit by jumping to the
		849	* bootstrap-time "top" top_env, as we cannot restore the "main"
		850	* coroutine as Coro has no such concept
629	*/	851	*/
630	PL_top_env = &PL_start_env;	852	PL_top_env = main_top_env;
631	/* inject call to cctx_init */	853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
632	prepare_cctx ((coro_cctx *)arg);
633
634	/* somebody will hit me for both perl_run and PL_restartop */
635	perl_run (PL_curinterp);
636
637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
638	abort ();
639	}	854	}
640		855
641	static coro_cctx *	856	static coro_cctx *
642	cctx_new ()	857	cctx_new ()
643	{	858	{
644	coro_cctx *cctx;	859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
645		862
		863	++cctx_count;
		864
646	New (0, cctx, 1, coro_cctx);	865	Newz (0, cctx, 1, coro_cctx);
647		866
648	#if HAVE_MMAP	867	#if HAVE_MMAP
649		868
650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
651	/* mmap suppsedly does allocate-on-write for us */	870	/* mmap supposedly does allocate-on-write for us */
652	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	871	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
653		872
654	if (cctx->sptr == (void *)-1)	873	if (cctx->sptr != (void *)-1)
655	{
656	perror ("FATAL: unable to mmap stack for coroutine");
657	_exit (EXIT_FAILURE);
658	}	874	{
659
660	# if STACKGUARD	875	# if CORO_STACKGUARD
661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
662	# endif	877	# endif
		878	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		879	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		880	cctx->flags \|= CC_MAPPED;
		881	}
		882	else
		883	#endif
		884	{
		885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
663		887
664	#else
665
666	cctx->ssize = STACKSIZE * (long)sizeof (long);
667	New (0, cctx->sptr, STACKSIZE, long);
668
669	if (!cctx->sptr)	888	if (!cctx->sptr)
670	{	889	{
671	perror ("FATAL: unable to malloc stack for coroutine");	890	perror ("FATAL: unable to allocate stack for coroutine");
672	_exit (EXIT_FAILURE);	891	_exit (EXIT_FAILURE);
673	}	892	}
674		893
675	#endif	894	stack_start = cctx->sptr;
		895	stack_size = cctx->ssize;
		896	}
676		897
677	#if USE_VALGRIND	898	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
678	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
679	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
680	cctx->ssize + (char *)cctx->sptr
681	);
682	#endif
683
684	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
685		900
686	return cctx;	901	return cctx;
687	}	902	}
688		903
689	static void	904	static void
690	cctx_free (coro_cctx *cctx)	905	cctx_destroy (coro_cctx *cctx)
691	{	906	{
692	if (!cctx)	907	if (!cctx)
693	return;	908	return;
694		909
		910	--cctx_count;
		911
695	#if USE_VALGRIND	912	#if CORO_USE_VALGRIND
696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697	#endif	914	#endif
698		915
699	#if HAVE_MMAP	916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
700	munmap (cctx->sptr, cctx->ssize);	918	munmap (cctx->sptr, cctx->ssize);
701	#else	919	else
		920	#endif
702	Safefree (cctx->sptr);	921	Safefree (cctx->sptr);
703	#endif
704		922
705	Safefree (cctx);	923	Safefree (cctx);
706	}	924	}
707		925
708	static coro_cctx *cctx_first;
709	static int cctx_count, cctx_idle;
710
711	static coro_cctx *	926	static coro_cctx *
712	cctx_get ()	927	cctx_get (pTHX)
713	{	928	{
714	coro_cctx *cctx;
715
716	if (cctx_first)	929	while (cctx_first)
717	{	930	{
		931	coro_cctx *cctx = cctx_first;
		932	cctx_first = cctx->next;
718	--cctx_idle;	933	--cctx_idle;
719	cctx = cctx_first;	934
720	cctx_first = cctx->next;	935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
721	}	936	return cctx;
722	else	937
723	{	938	cctx_destroy (cctx);
724	++cctx_count;
725	cctx = cctx_new ();
726	PL_op = PL_op->op_next;
727	}	939	}
728		940
729	return cctx;	941	return cctx_new ();
730	}	942	}
731		943
732	static void	944	static void
733	cctx_put (coro_cctx *cctx)	945	cctx_put (coro_cctx *cctx)
734	{	946	{
		947	/* free another cctx if overlimit */
		948	if (cctx_idle >= MAX_IDLE_CCTX)
		949	{
		950	coro_cctx *first = cctx_first;
		951	cctx_first = first->next;
		952	--cctx_idle;
		953
		954	cctx_destroy (first);
		955	}
		956
735	++cctx_idle;	957	++cctx_idle;
736	cctx->next = cctx_first;	958	cctx->next = cctx_first;
737	cctx_first = cctx;	959	cctx_first = cctx;
738	}	960	}
739		961
740	/* never call directly, always through the coro_state_transfer global variable */	962	/ coroutine switching ***************************************************/
		963
741	static void NOINLINE	964	static void NOINLINE
		965	transfer_check (pTHX_ struct coro prev, struct coro next)
		966	{
		967	if (prev != next)
		968	{
		969	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		970	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		971
		972	if (next->flags & CF_RUNNING)
		973	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		974
		975	if (next->flags & CF_DESTROYED)
		976	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		977
		978	if (PL_lex_state != LEX_NOTPARSING)
		979	croak ("Coro::State::transfer called while parsing, but this is not supported");
		980	}
		981	}
		982
		983	/* always use the TRANSFER macro */
		984	static void NOINLINE
742	transfer (struct coro prev, struct coro next, int flags)	985	transfer (pTHX_ struct coro prev, struct coro next)
743	{	986	{
744	dSTACKLEVEL;	987	dSTACKLEVEL;
745		988
746	/* sometimes transfer is only called to set idle_sp */	989	/* sometimes transfer is only called to set idle_sp */
747	if (flags == TRANSFER_SET_STACKLEVEL)	990	if (!next)
		991	{
748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	992	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		993	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		994	}
749	else if (prev != next)	995	else if (prev != next)
750	{	996	{
751	coro_cctx *prev__cctx;	997	coro_cctx *prev__cctx;
752		998
		999	if (prev->flags & CF_NEW)
		1000	{
		1001	/* create a new empty context */
		1002	Newz (0, prev->cctx, 1, coro_cctx);
		1003	prev->flags &= ~CF_NEW;
		1004	prev->flags \|= CF_RUNNING;
		1005	}
		1006
		1007	prev->flags &= ~CF_RUNNING;
		1008	next->flags \|= CF_RUNNING;
		1009
753	LOCK;	1010	LOCK;
754		1011
755	if (next->mainstack)	1012	if (next->flags & CF_NEW)
756	{	1013	{
757	/* coroutine already started */	1014	/* need to start coroutine */
758	SAVE (prev, flags);	1015	next->flags &= ~CF_NEW;
759	LOAD (next);	1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
760	}	1020	}
761	else	1021	else
762	{	1022	{
763	/* need to start coroutine */	1023	/* coroutine already started */
764	/* first get rid of the old state */	1024	save_perl (aTHX_ prev);
765	SAVE (prev, -1);	1025	load_perl (aTHX_ next);
766	/* setup coroutine call */
767	setup_coro (next);
768	/* need a stack */
769	next->cctx = 0;
770	}	1026	}
771		1027
772	if (!prev->cctx)
773	/* create a new empty context */
774	Newz (0, prev->cctx, 1, coro_cctx);
775
776	prev__cctx = prev->cctx;	1028	prev__cctx = prev->cctx;
777		1029
778	/* possibly "free" the cctx */	1030	/* possibly "free" the cctx */
779	if (prev__cctx->idle_sp == STACKLEVEL)	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
780	{	1032	{
		1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1035
		1036	prev->cctx = 0;
		1037
781	cctx_put (prev__cctx);	1038	cctx_put (prev__cctx);
782	prev->cctx = 0;
783	}	1039	}
784		1040
		1041	++next->usecount;
		1042
785	if (!next->cctx)	1043	if (!next->cctx)
786	next->cctx = cctx_get ();	1044	next->cctx = cctx_get (aTHX);
787		1045
788	if (prev__cctx != next->cctx)	1046	if (prev__cctx != next->cctx)
789	{	1047	{
790	prev__cctx->top_env = PL_top_env;	1048	prev__cctx->top_env = PL_top_env;
791	PL_top_env = next->cctx->top_env;	1049	PL_top_env = next->cctx->top_env;
792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793	}	1051	}
794		1052
795	free_coro_mortal ();	1053	free_coro_mortal (aTHX);
796
797	UNLOCK;	1054	UNLOCK;
798	}	1055	}
799	}	1056	}
800		1057
801	struct transfer_args	1058	struct transfer_args
802	{	1059	{
803	struct coro prev, next;	1060	struct coro prev, next;
804	int flags;
805	};	1061	};
806		1062
807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1063	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1064	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
808		1065
		1066	/ high level stuff ******************************************************/
		1067
809	static void	1068	static int
810	coro_state_destroy (struct coro *coro)	1069	coro_state_destroy (pTHX_ struct coro *coro)
811	{	1070	{
812	if (coro->refcnt--)	1071	if (coro->flags & CF_DESTROYED)
813	return;	1072	return 0;
		1073
		1074	coro->flags \|= CF_DESTROYED;
		1075
		1076	if (coro->flags & CF_READY)
		1077	{
		1078	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1079	/* alternative: look through all ready queues and remove the coro */
		1080	LOCK;
		1081	--coro_nready;
		1082	UNLOCK;
		1083	}
		1084	else
		1085	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
814		1086
815	if (coro->mainstack && coro->mainstack != main_mainstack)	1087	if (coro->mainstack && coro->mainstack != main_mainstack)
816	{	1088	{
817	struct coro temp;	1089	struct coro temp;
818		1090
819	SAVE ((&temp), TRANSFER_SAVE_ALL);	1091	if (coro->flags & CF_RUNNING)
820	LOAD (coro);	1092	croak ("FATAL: tried to destroy currently running coroutine");
821		1093
822	coro_destroy_stacks ();	1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
823		1096
		1097	coro_destroy (aTHX_ coro);
		1098
824	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
825		1100
826	coro->mainstack = 0;	1101	coro->mainstack = 0;
827	}	1102	}
828		1103
829	cctx_free (coro->cctx);	1104	cctx_destroy (coro->cctx);
830	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
831	Safefree (coro);	1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
832	}	1112	}
833		1113
834	static int	1114	static int
835	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1115	coro_state_free (pTHX_ SV sv, MAGIC mg)
836	{	1116	{
837	struct coro coro = (struct coro )mg->mg_ptr;	1117	struct coro coro = (struct coro )mg->mg_ptr;
838	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
839		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
840	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
841		1127
842	return 0;	1128	return 0;
843	}	1129	}
844		1130
845	static int	1131	static int
…		…
852	return 0;	1138	return 0;
853	}	1139	}
854		1140
855	static MGVTBL coro_state_vtbl = {	1141	static MGVTBL coro_state_vtbl = {
856	0, 0, 0, 0,	1142	0, 0, 0, 0,
857	coro_state_clear,	1143	coro_state_free,
858	0,	1144	0,
859	#ifdef MGf_DUP	1145	#ifdef MGf_DUP
860	coro_state_dup,	1146	coro_state_dup,
861	#else	1147	#else
862	# define MGf_DUP 0	1148	# define MGf_DUP 0
863	#endif	1149	#endif
864	};	1150	};
865		1151
866	static struct coro *
867	SvSTATE (SV *coro)
868	{
869	HV *stash;
870	MAGIC *mg;
871
872	if (SvROK (coro))
873	coro = SvRV (coro);
874
875	stash = SvSTASH (coro);
876	if (stash != coro_stash && stash != coro_state_stash)
877	{
878	/* very slow, but rare, check */
879	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
880	croak ("Coro::State object required");
881	}
882
883	mg = SvMAGIC (coro);
884	assert (mg->mg_type == PERL_MAGIC_ext);
885	return (struct coro *)mg->mg_ptr;
886	}
887
888	static void	1152	static void
889	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1153	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
890	{	1154	{
891	ta->prev = SvSTATE (prev);	1155	ta->prev = SvSTATE (prev_sv);
892	ta->next = SvSTATE (next);	1156	ta->next = SvSTATE (next_sv);
893	ta->flags = flags;	1157	TRANSFER_CHECK (*ta);
894	}	1158	}
895		1159
896	static void	1160	static void
897	api_transfer (SV prev, SV next, int flags)	1161	api_transfer (SV prev_sv, SV next_sv)
898	{	1162	{
899	dTHX;	1163	dTHX;
900	struct transfer_args ta;	1164	struct transfer_args ta;
901		1165
902	prepare_transfer (&ta, prev, next, flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
903	TRANSFER (ta);	1167	TRANSFER (ta);
904	}	1168	}
905		1169
906	/ Coro ******************************************************************/	1170	/ Coro ******************************************************************/
907		1171
908	#define PRIO_MAX 3
909	#define PRIO_HIGH 1
910	#define PRIO_NORMAL 0
911	#define PRIO_LOW -1
912	#define PRIO_IDLE -3
913	#define PRIO_MIN -4
914
915	/* for Coro.pm */
916	static GV coro_current, coro_idle;
917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
918	static int coro_nready;
919
920	static void	1172	static void
921	coro_enq (SV *sv)	1173	coro_enq (pTHX_ SV *coro_sv)
922	{	1174	{
923	int prio;
924
925	if (SvTYPE (sv) != SVt_PVHV)
926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
927
928	prio = SvSTATE (sv)->prio;
929
930	av_push (coro_ready [prio - PRIO_MIN], sv);	1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
931	coro_nready++;
932	}	1176	}
933		1177
934	static SV *	1178	static SV *
935	coro_deq (int min_prio)	1179	coro_deq (pTHX_ int min_prio)
936	{	1180	{
937	int prio = PRIO_MAX - PRIO_MIN;	1181	int prio = PRIO_MAX - PRIO_MIN;
938		1182
939	min_prio -= PRIO_MIN;	1183	min_prio -= PRIO_MIN;
940	if (min_prio < 0)	1184	if (min_prio < 0)
941	min_prio = 0;	1185	min_prio = 0;
942		1186
943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
944	if (AvFILLp (coro_ready [prio]) >= 0)	1188	if (AvFILLp (coro_ready [prio]) >= 0)
945	{
946	coro_nready--;
947	return av_shift (coro_ready [prio]);	1189	return av_shift (coro_ready [prio]);
948	}
949		1190
950	return 0;	1191	return 0;
951	}	1192	}
952		1193
953	static void	1194	static int
954	api_ready (SV *coro)	1195	api_ready (SV *coro_sv)
955	{	1196	{
956	dTHX;	1197	dTHX;
		1198	struct coro *coro;
957		1199
958	if (SvROK (coro))	1200	if (SvROK (coro_sv))
959	coro = SvRV (coro);	1201	coro_sv = SvRV (coro_sv);
		1202
		1203	coro = SvSTATE (coro_sv);
		1204
		1205	if (coro->flags & CF_READY)
		1206	return 0;
		1207
		1208	coro->flags \|= CF_READY;
960		1209
961	LOCK;	1210	LOCK;
962	coro_enq (SvREFCNT_inc (coro));	1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
963	UNLOCK;	1213	UNLOCK;
964	}
965		1214
		1215	return 1;
		1216	}
		1217
966	static void	1218	static int
		1219	api_is_ready (SV *coro_sv)
		1220	{
		1221	dTHX;
		1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1223	}
		1224
		1225	static void
967	prepare_schedule (struct transfer_args *ta)	1226	prepare_schedule (pTHX_ struct transfer_args *ta)
968	{	1227	{
969	SV current, prev, *next;	1228	SV prev_sv, next_sv;
970
971	current = GvSV (coro_current);
972		1229
973	for (;;)	1230	for (;;)
974	{	1231	{
975	LOCK;	1232	LOCK;
976	next = coro_deq (PRIO_MIN);	1233	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1234
		1235	/* nothing to schedule: call the idle handler */
		1236	if (!next_sv)
		1237	{
		1238	dSP;
		1239	UNLOCK;
		1240
		1241	ENTER;
		1242	SAVETMPS;
		1243
		1244	PUSHMARK (SP);
		1245	PUTBACK;
		1246	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1247
		1248	FREETMPS;
		1249	LEAVE;
		1250	continue;
		1251	}
		1252
		1253	ta->next = SvSTATE (next_sv);
		1254
		1255	/* cannot transfer to destroyed coros, skip and look for next */
		1256	if (ta->next->flags & CF_DESTROYED)
		1257	{
		1258	UNLOCK;
		1259	SvREFCNT_dec (next_sv);
		1260	/* coro_nready is already taken care of by destroy */
		1261	continue;
		1262	}
		1263
		1264	--coro_nready;
977	UNLOCK;	1265	UNLOCK;
978
979	if (next)
980	break;	1266	break;
981
982	{
983	dSP;
984
985	ENTER;
986	SAVETMPS;
987
988	PUSHMARK (SP);
989	PUTBACK;
990	call_sv (GvSV (coro_idle), G_DISCARD);
991
992	FREETMPS;
993	LEAVE;
994	}	1267	}
995	}
996
997	prev = SvRV (current);
998	SvRV (current) = next;
999		1268
1000	/* free this only after the transfer */	1269	/* free this only after the transfer */
		1270	prev_sv = SvRV (coro_current);
		1271	ta->prev = SvSTATE (prev_sv);
		1272	TRANSFER_CHECK (*ta);
		1273	assert (ta->next->flags & CF_READY);
		1274	ta->next->flags &= ~CF_READY;
		1275	SvRV_set (coro_current, next_sv);
		1276
1001	LOCK;	1277	LOCK;
1002	free_coro_mortal ();	1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
1003	UNLOCK;	1280	UNLOCK;
1004	coro_mortal = prev;
1005
1006	ta->prev = SvSTATE (prev);
1007	ta->next = SvSTATE (next);
1008	ta->flags = TRANSFER_SAVE_ALL;
1009	}	1281	}
1010		1282
1011	static void	1283	static void
1012	prepare_cede (struct transfer_args *ta)	1284	prepare_cede (pTHX_ struct transfer_args *ta)
1013	{	1285	{
1014	LOCK;	1286	api_ready (coro_current);
1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016	UNLOCK;
1017
1018	prepare_schedule (ta);	1287	prepare_schedule (aTHX_ ta);
		1288	}
		1289
		1290	static int
		1291	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1292	{
		1293	if (coro_nready)
		1294	{
		1295	SV *prev = SvRV (coro_current);
		1296	prepare_schedule (aTHX_ ta);
		1297	api_ready (prev);
		1298	return 1;
		1299	}
		1300	else
		1301	return 0;
1019	}	1302	}
1020		1303
1021	static void	1304	static void
1022	api_schedule (void)	1305	api_schedule (void)
1023	{	1306	{
1024	dTHX;	1307	dTHX;
1025	struct transfer_args ta;	1308	struct transfer_args ta;
1026		1309
1027	prepare_schedule (&ta);	1310	prepare_schedule (aTHX_ &ta);
1028	TRANSFER (ta);	1311	TRANSFER (ta);
1029	}	1312	}
1030		1313
1031	static void	1314	static int
1032	api_cede (void)	1315	api_cede (void)
1033	{	1316	{
1034	dTHX;	1317	dTHX;
1035	struct transfer_args ta;	1318	struct transfer_args ta;
1036		1319
1037	prepare_cede (&ta);	1320	prepare_cede (aTHX_ &ta);
		1321
		1322	if (ta.prev != ta.next)
		1323	{
1038	TRANSFER (ta);	1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
1039	}	1329	}
1040		1330
		1331	static int
		1332	api_cede_notself (void)
		1333	{
		1334	dTHX;
		1335	struct transfer_args ta;
		1336
		1337	if (prepare_cede_notself (aTHX_ &ta))
		1338	{
		1339	TRANSFER (ta);
		1340	return 1;
		1341	}
		1342	else
		1343	return 0;
		1344	}
		1345
		1346	static void
		1347	api_trace (SV *coro_sv, int flags)
		1348	{
		1349	dTHX;
		1350	struct coro *coro = SvSTATE (coro_sv);
		1351
		1352	if (flags & CC_TRACE)
		1353	{
		1354	if (!coro->cctx)
		1355	coro->cctx = cctx_new ();
		1356	else if (!(coro->cctx->flags & CC_TRACE))
		1357	croak ("cannot enable tracing on coroutine with custom stack");
		1358
		1359	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1360	}
		1361	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1362	{
		1363	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1364
		1365	if (coro->flags & CF_RUNNING)
		1366	PL_runops = RUNOPS_DEFAULT;
		1367	else
		1368	coro->runops = RUNOPS_DEFAULT;
		1369	}
		1370	}
		1371
1041	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1042		1373
1043	PROTOTYPES: DISABLE	1374	PROTOTYPES: DISABLE
1044		1375
1045	BOOT:	1376	BOOT:
1046	{	1377	{
1047	#ifdef USE_ITHREADS	1378	#ifdef USE_ITHREADS
1048	MUTEX_INIT (&coro_mutex);	1379	MUTEX_INIT (&coro_mutex);
1049	#endif	1380	#endif
1050	BOOT_PAGESIZE;	1381	BOOT_PAGESIZE;
1051		1382
		1383	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1384	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1385
1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1386	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1053		1387
1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1391	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1057		1392
1058	main_mainstack = PL_mainstack;	1393	main_mainstack = PL_mainstack;
		1394	main_top_env = PL_top_env;
		1395
		1396	while (main_top_env->je_prev)
		1397	main_top_env = main_top_env->je_prev;
1059		1398
1060	coroapi.ver = CORO_API_VERSION;	1399	coroapi.ver = CORO_API_VERSION;
1061	coroapi.transfer = api_transfer;	1400	coroapi.transfer = api_transfer;
1062		1401
1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1402	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1070	struct coro *coro;	1409	struct coro *coro;
1071	HV *hv;	1410	HV *hv;
1072	int i;	1411	int i;
1073		1412
1074	Newz (0, coro, 1, struct coro);	1413	Newz (0, coro, 1, struct coro);
1075	coro->args = newAV ();	1414	coro->args = newAV ();
		1415	coro->flags = CF_NEW;
1076		1416
		1417	if (coro_first) coro_first->prev = coro;
		1418	coro->next = coro_first;
		1419	coro_first = coro;
		1420
1077	hv = newHV ();	1421	coro->hv = hv = newHV ();
1078	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1422	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1423	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1080		1424
1081	for (i = 1; i < items; i++)	1425	for (i = 1; i < items; i++)
1082	av_push (coro->args, newSVsv (ST (i)));	1426	av_push (coro->args, newSVsv (ST (i)));
1083	}	1427	}
1084	OUTPUT:	1428	OUTPUT:
1085	RETVAL	1429	RETVAL
1086		1430
		1431	# these not obviously related functions are all rolled into the same xs
		1432	# function to increase chances that they all will call transfer with the same
		1433	# stack offset
1087	void	1434	void
1088	_set_stacklevel (...)	1435	_set_stacklevel (...)
1089	ALIAS:	1436	ALIAS:
1090	Coro::State::transfer = 1	1437	Coro::State::transfer = 1
1091	Coro::schedule = 2	1438	Coro::schedule = 2
1092	Coro::cede = 3	1439	Coro::cede = 3
1093	Coro::Cont::yield = 4	1440	Coro::cede_notself = 4
1094	CODE:	1441	CODE:
1095	{	1442	{
1096	struct transfer_args ta;	1443	struct transfer_args ta;
1097		1444
1098	switch (ix)	1445	switch (ix)
1099	{	1446	{
1100	case 0:	1447	case 0:
1101	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1448	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1102	ta.next = 0;	1449	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1450	break;
1105		1451
1106	case 1:	1452	case 1:
1107	if (items != 3)	1453	if (items != 2)
1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1454	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109		1455
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1456	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111	break;	1457	break;
1112		1458
1113	case 2:	1459	case 2:
1114	prepare_schedule (&ta);	1460	prepare_schedule (aTHX_ &ta);
1115	break;	1461	break;
1116		1462
1117	case 3:	1463	case 3:
1118	prepare_cede (&ta);	1464	prepare_cede (aTHX_ &ta);
1119	break;	1465	break;
1120		1466
1121	case 4:	1467	case 4:
1122	{	1468	if (!prepare_cede_notself (aTHX_ &ta))
1123	SV *yieldstack;	1469	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1470
1127	yieldstack = *hv_fetch (
1128	(HV *)SvRV (GvSV (coro_current)),
1129	"yieldstack", sizeof ("yieldstack") - 1,
1130	0
1131	);
1132
1133	/* set up @_ -- ugly */
1134	av_clear (defav);
1135	av_fill (defav, items - 1);
1136	while (items--)
1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139	sv = av_pop ((AV *)SvRV (yieldstack));
1140	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1141	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1142	ta.flags = 0;
1143	SvREFCNT_dec (sv);
1144	}
1145	break;	1471	break;
1146
1147	}	1472	}
1148		1473
		1474	BARRIER;
1149	TRANSFER (ta);	1475	TRANSFER (ta);
1150	}
1151		1476
1152	void	1477	if (GIMME_V != G_VOID && ta.next != ta.prev)
1153	_clone_state_from (SV dst, SV src)	1478	XSRETURN_YES;
		1479	}
		1480
		1481	bool
		1482	_destroy (SV *coro_sv)
1154	CODE:	1483	CODE:
1155	{	1484	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1485	OUTPUT:
1157		1486	RETVAL
1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160	++coro_src->refcnt;
1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1162	}
1163		1487
1164	void	1488	void
1165	_exit (code)	1489	_exit (code)
1166	int code	1490	int code
1167	PROTOTYPE: $	1491	PROTOTYPE: $
1168	CODE:	1492	CODE:
1169	_exit (code);	1493	_exit (code);
1170		1494
1171	int	1495	int
		1496	cctx_stacksize (int new_stacksize = 0)
		1497	CODE:
		1498	RETVAL = coro_stacksize;
		1499	if (new_stacksize)
		1500	coro_stacksize = new_stacksize;
		1501	OUTPUT:
		1502	RETVAL
		1503
		1504	int
1172	cctx_count ()	1505	cctx_count ()
1173	CODE:	1506	CODE:
1174	RETVAL = cctx_count;	1507	RETVAL = cctx_count;
1175	OUTPUT:	1508	OUTPUT:
1176	RETVAL	1509	RETVAL
…		…
1180	CODE:	1513	CODE:
1181	RETVAL = cctx_idle;	1514	RETVAL = cctx_idle;
1182	OUTPUT:	1515	OUTPUT:
1183	RETVAL	1516	RETVAL
1184		1517
		1518	void
		1519	list ()
		1520	PPCODE:
		1521	{
		1522	struct coro *coro;
		1523	for (coro = coro_first; coro; coro = coro->next)
		1524	if (coro->hv)
		1525	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1526	}
		1527
		1528	void
		1529	call (Coro::State coro, SV *coderef)
		1530	ALIAS:
		1531	eval = 1
		1532	CODE:
		1533	{
		1534	if (coro->mainstack)
		1535	{
		1536	struct coro temp;
		1537	Zero (&temp, 1, struct coro);
		1538
		1539	if (!(coro->flags & CF_RUNNING))
		1540	{
		1541	save_perl (aTHX_ &temp);
		1542	load_perl (aTHX_ coro);
		1543	}
		1544
		1545	{
		1546	dSP;
		1547	ENTER;
		1548	SAVETMPS;
		1549	PUSHMARK (SP);
		1550	PUTBACK;
		1551	if (ix)
		1552	eval_sv (coderef, 0);
		1553	else
		1554	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1555	SPAGAIN;
		1556	FREETMPS;
		1557	LEAVE;
		1558	PUTBACK;
		1559	}
		1560
		1561	if (!(coro->flags & CF_RUNNING))
		1562	{
		1563	save_perl (aTHX_ coro);
		1564	load_perl (aTHX_ &temp);
		1565	}
		1566	}
		1567	}
		1568
		1569	SV *
		1570	is_ready (Coro::State coro)
		1571	PROTOTYPE: $
		1572	ALIAS:
		1573	is_ready = CF_READY
		1574	is_running = CF_RUNNING
		1575	is_new = CF_NEW
		1576	is_destroyed = CF_DESTROYED
		1577	CODE:
		1578	RETVAL = boolSV (coro->flags & ix);
		1579	OUTPUT:
		1580	RETVAL
		1581
		1582	void
		1583	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1584
		1585	SV *
		1586	has_stack (Coro::State coro)
		1587	PROTOTYPE: $
		1588	CODE:
		1589	RETVAL = boolSV (!!coro->cctx);
		1590	OUTPUT:
		1591	RETVAL
		1592
		1593	int
		1594	is_traced (Coro::State coro)
		1595	PROTOTYPE: $
		1596	CODE:
		1597	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1598	OUTPUT:
		1599	RETVAL
		1600
		1601	IV
		1602	rss (Coro::State coro)
		1603	PROTOTYPE: $
		1604	ALIAS:
		1605	usecount = 1
		1606	CODE:
		1607	switch (ix)
		1608	{
		1609	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1610	case 1: RETVAL = coro->usecount; break;
		1611	}
		1612	OUTPUT:
		1613	RETVAL
		1614
		1615
1185	MODULE = Coro::State PACKAGE = Coro	1616	MODULE = Coro::State PACKAGE = Coro
1186		1617
1187	BOOT:	1618	BOOT:
1188	{	1619	{
1189	int i;	1620	int i;
		1621
		1622	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1623	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1624	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1625
		1626	coro_current = get_sv ("Coro::current", FALSE);
		1627	SvREADONLY_on (coro_current);
1190		1628
1191	coro_stash = gv_stashpv ("Coro", TRUE);	1629	coro_stash = gv_stashpv ("Coro", TRUE);
1192		1630
1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1631	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1632	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1633	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1634	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1635	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1636	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1199		1637
1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1202
1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1638	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1204	coro_ready[i] = newAV ();	1639	coro_ready[i] = newAV ();
1205		1640
1206	{	1641	{
1207	SV *sv = perl_get_sv("Coro::API", 1);	1642	SV *sv = perl_get_sv("Coro::API", 1);
1208		1643
1209	coroapi.schedule = api_schedule;	1644	coroapi.schedule = api_schedule;
1210	coroapi.cede = api_cede;	1645	coroapi.cede = api_cede;
		1646	coroapi.cede_notself = api_cede_notself;
1211	coroapi.ready = api_ready;	1647	coroapi.ready = api_ready;
		1648	coroapi.is_ready = api_is_ready;
1212	coroapi.nready = &coro_nready;	1649	coroapi.nready = &coro_nready;
1213	coroapi.current = coro_current;	1650	coroapi.current = coro_current;
1214		1651
1215	GCoroAPI = &coroapi;	1652	GCoroAPI = &coroapi;
1216	sv_setiv (sv, (IV)&coroapi);	1653	sv_setiv (sv, (IV)&coroapi);
1217	SvREADONLY_on (sv);	1654	SvREADONLY_on (sv);
1218	}	1655	}
1219	}	1656	}
		1657
		1658	void
		1659	_set_current (SV *current)
		1660	PROTOTYPE: $
		1661	CODE:
		1662	SvREFCNT_dec (SvRV (coro_current));
		1663	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1220		1664
1221	int	1665	int
1222	prio (Coro::State coro, int newprio = 0)	1666	prio (Coro::State coro, int newprio = 0)
1223	ALIAS:	1667	ALIAS:
1224	nice = 1	1668	nice = 1
…		…
1227	RETVAL = coro->prio;	1671	RETVAL = coro->prio;
1228		1672
1229	if (items > 1)	1673	if (items > 1)
1230	{	1674	{
1231	if (ix)	1675	if (ix)
1232	newprio += coro->prio;	1676	newprio = coro->prio - newprio;
1233		1677
1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1678	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1679	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1236		1680
1237	coro->prio = newprio;	1681	coro->prio = newprio;
1238	}	1682	}
1239	}	1683	}
		1684	OUTPUT:
		1685	RETVAL
1240		1686
1241	void	1687	SV *
1242	ready (SV *self)	1688	ready (SV *self)
1243	PROTOTYPE: $	1689	PROTOTYPE: $
1244	CODE:	1690	CODE:
1245	api_ready (self);	1691	RETVAL = boolSV (api_ready (self));
		1692	OUTPUT:
		1693	RETVAL
1246		1694
1247	int	1695	int
1248	nready (...)	1696	nready (...)
1249	PROTOTYPE:	1697	PROTOTYPE:
1250	CODE:	1698	CODE:
1251	RETVAL = coro_nready;	1699	RETVAL = coro_nready;
1252	OUTPUT:	1700	OUTPUT:
1253	RETVAL	1701	RETVAL
1254		1702
		1703	# for async_pool speedup
		1704	void
		1705	_pool_1 (SV *cb)
		1706	CODE:
		1707	{
		1708	struct coro *coro = SvSTATE (coro_current);
		1709	HV hv = (HV )SvRV (coro_current);
		1710	AV *defav = GvAV (PL_defgv);
		1711	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1712	AV *invoke_av;
		1713	int i, len;
		1714
		1715	if (!invoke)
		1716	croak ("\3terminate\2\n");
		1717
		1718	SvREFCNT_dec (coro->saved_deffh);
		1719	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1720
		1721	hv_store (hv, "desc", sizeof ("desc") - 1,
		1722	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1723
		1724	invoke_av = (AV *)SvRV (invoke);
		1725	len = av_len (invoke_av);
		1726
		1727	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1728
		1729	if (len > 0)
		1730	{
		1731	av_fill (defav, len - 1);
		1732	for (i = 0; i < len; ++i)
		1733	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1734	}
		1735
		1736	SvREFCNT_dec (invoke);
		1737	}
		1738
		1739	void
		1740	_pool_2 (SV *cb)
		1741	CODE:
		1742	{
		1743	struct coro *coro = SvSTATE (coro_current);
		1744
		1745	sv_setsv (cb, &PL_sv_undef);
		1746
		1747	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1748	coro->saved_deffh = 0;
		1749
		1750	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1751	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1752	croak ("\3terminate\2\n");
		1753
		1754	av_clear (GvAV (PL_defgv));
		1755	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1756	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1757
		1758	coro->prio = 0;
		1759
		1760	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1761	api_trace (coro_current, 0);
		1762
		1763	av_push (av_async_pool, newSVsv (coro_current));
		1764	}
		1765
		1766
1255	MODULE = Coro::State PACKAGE = Coro::AIO	1767	MODULE = Coro::State PACKAGE = Coro::AIO
1256		1768
1257	SV *	1769	SV *
1258	_get_state ()	1770	_get_state ()
1259	CODE:	1771	CODE:
1260	{	1772	{
1261	struct {	1773	struct io_state *data;
1262	int errorno;
1263	int laststype;
1264	int laststatval;
1265	Stat_t statcache;
1266	} data;
1267		1774
		1775	RETVAL = newSV (sizeof (struct io_state));
		1776	data = (struct io_state *)SvPVX (RETVAL);
		1777	SvCUR_set (RETVAL, sizeof (struct io_state));
		1778	SvPOK_only (RETVAL);
		1779
1268	data.errorno = errno;	1780	data->errorno = errno;
1269	data.laststype = PL_laststype;	1781	data->laststype = PL_laststype;
1270	data.laststatval = PL_laststatval;	1782	data->laststatval = PL_laststatval;
1271	data.statcache = PL_statcache;	1783	data->statcache = PL_statcache;
1272
1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
1274	}	1784	}
1275	OUTPUT:	1785	OUTPUT:
1276	RETVAL	1786	RETVAL
1277		1787
1278	void	1788	void
1279	_set_state (char *data_)	1789	_set_state (char *data_)
1280	PROTOTYPE: $	1790	PROTOTYPE: $
1281	CODE:	1791	CODE:
1282	{	1792	{
1283	struct {	1793	struct io_state data = (void )data_;
1284	int errorno;
1285	int laststype;
1286	int laststatval;
1287	Stat_t statcache;
1288	} data = (void )data_;
1289		1794
1290	errno = data->errorno;	1795	errno = data->errorno;
1291	PL_laststype = data->laststype;	1796	PL_laststype = data->laststype;
1292	PL_laststatval = data->laststatval;	1797	PL_laststatval = data->laststatval;
1293	PL_statcache = data->statcache;	1798	PL_statcache = data->statcache;
1294	}	1799	}
		1800

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Comparing Coro/Coro/State.xs (file contents): Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC vs. Revision 1.188 by root, Fri Oct 5 20:36:31 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC vs.
Revision 1.188 by root, Fri Oct 5 20:36:31 2007 UTC