[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 1.186 by root, Fri Oct 5 20:10:42 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
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
		144	static struct coro_cctx *cctx_first;
		145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		154	};
107		155
108	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
109	typedef struct coro_cctx {	157	typedef struct coro_cctx {
110	struct coro_cctx *next;	158	struct coro_cctx *next;
111		159
112	/* the stack */	160	/* the stack */
113	void *sptr;	161	void *sptr;
114	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
115		163
116	/* cpu state */	164	/* cpu state */
117	void idle_sp; / sp of top-level transfer/schedule/cede call */	165	void idle_sp; / sp of top-level transfer/schedule/cede call */
		166	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
118	JMPENV *top_env;	167	JMPENV *top_env;
119	coro_context cctx;	168	coro_context cctx;
120		169
121	#if USE_VALGRIND	170	#if CORO_USE_VALGRIND
122	int valgrind_id;	171	int valgrind_id;
123	#endif	172	#endif
		173	unsigned char flags;
124	} coro_cctx;	174	} coro_cctx;
		175
		176	enum {
		177	CF_RUNNING = 0x0001, /* coroutine is running */
		178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		181	};
125		182
126	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
127	struct coro {	184	struct coro {
128	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
129	coro_cctx *cctx;	186	coro_cctx *cctx;
130		187
131	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
132	AV *args;	189	AV *args;
133	int refcnt;	190	int refcnt;
		191	int flags; /* CF_ flags */
134		192
135	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
136	AV *defav;	194	AV defav; / @_ */
137	SV *defsv;	195	SV defsv; / $_ */
138	SV *errsv;	196	SV errsv; / $@ */
		197	SV deffh; / default filehandle */
		198	SV irssv; / $/ */
		199	SV irssv_sv; / real $/ cache */
139		200
140	/* saved global state not related to stacks */	201	#define VAR(name,type) type name;
141	U8 dowarn;	202	# include "state.h"
142	I32 in_eval;	203	#undef VAR
143		204
144	/* the stacks and related info (callchain etc..) */	205	/* statistics */
145	PERL_SI *curstackinfo;	206	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		207
174	/* coro process data */	208	/* coro process data */
175	int prio;	209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	SV *saved_deffh;
		214
		215	/* linked list */
		216	struct coro next, prev;
		217	HV hv; / the perl hash associated with this coro, if any */
176	};	218	};
177		219
178	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
179	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
180		222
		223	/ Coro ******************************************************************/
		224
		225	#define PRIO_MAX 3
		226	#define PRIO_HIGH 1
		227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
		231
		232	/* for Coro.pm */
		233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		235	static int coro_nready;
		236	static struct coro *coro_first;
		237
		238	/ lowlevel stuff ********************************************************/
		239
181	static AV *	240	static AV *
182	coro_clone_padlist (CV *cv)	241	coro_clone_padlist (pTHX_ CV *cv)
183	{	242	{
184	AV *padlist = CvPADLIST (cv);	243	AV *padlist = CvPADLIST (cv);
185	AV newpadlist, newpad;	244	AV newpadlist, newpad;
186		245
187	newpadlist = newAV ();	246	newpadlist = newAV ();
…		…
199		258
200	return newpadlist;	259	return newpadlist;
201	}	260	}
202		261
203	static void	262	static void
204	free_padlist (AV *padlist)	263	free_padlist (pTHX_ AV *padlist)
205	{	264	{
206	/* may be during global destruction */	265	/* may be during global destruction */
207	if (SvREFCNT (padlist))	266	if (SvREFCNT (padlist))
208	{	267	{
209	I32 i = AvFILLp (padlist);	268	I32 i = AvFILLp (padlist);
…		…
230	AV *padlist;	289	AV *padlist;
231	AV av = (AV )mg->mg_obj;	290	AV av = (AV )mg->mg_obj;
232		291
233	/* casting is fun. */	292	/* casting is fun. */
234	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	293	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
235	free_padlist (padlist);	294	free_padlist (aTHX_ padlist);
236		295
237	SvREFCNT_dec (av);	296	SvREFCNT_dec (av);
238		297
239	return 0;	298	return 0;
240	}	299	}
241		300
242	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
243		302
244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
245		304
		305	#define CORO_MAGIC(cv) \
		306	SvMAGIC (cv) \
		307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		308	? SvMAGIC (cv) \
		309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		310	: 0
		311
		312	static struct coro *
		313	SvSTATE_ (pTHX_ SV *coro)
		314	{
		315	HV *stash;
		316	MAGIC *mg;
		317
		318	if (SvROK (coro))
		319	coro = SvRV (coro);
		320
		321	if (SvTYPE (coro) != SVt_PVHV)
		322	croak ("Coro::State object required");
		323
		324	stash = SvSTASH (coro);
		325	if (stash != coro_stash && stash != coro_state_stash)
		326	{
		327	/* very slow, but rare, check */
		328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		329	croak ("Coro::State object required");
		330	}
		331
		332	mg = CORO_MAGIC (coro);
		333	return (struct coro *)mg->mg_ptr;
		334	}
		335
		336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		337
246	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
247	static void	339	static void
248	get_padlist (CV *cv)	340	get_padlist (pTHX_ CV *cv)
249	{	341	{
250	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
251		344
252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
253	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
254	else	347	else
255	{	348	{
256	#if 0	349	#if CORO_PREFER_PERL_FUNCTIONS
257	/* this is probably cleaner, but also slower? */	350	/* this is probably cleaner, but also slower? */
258	CV *cp = Perl_cv_clone (cv);	351	CV *cp = Perl_cv_clone (cv);
259	CvPADLIST (cv) = CvPADLIST (cp);	352	CvPADLIST (cv) = CvPADLIST (cp);
260	CvPADLIST (cp) = 0;	353	CvPADLIST (cp) = 0;
261	SvREFCNT_dec (cp);	354	SvREFCNT_dec (cp);
262	#else	355	#else
263	CvPADLIST (cv) = coro_clone_padlist (cv);	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
264	#endif	357	#endif
265	}	358	}
266	}	359	}
267		360
268	static void	361	static void
269	put_padlist (CV *cv)	362	put_padlist (pTHX_ CV *cv)
270	{	363	{
271	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
272		366
273	if (!mg)	367	if (!mg)
274	{	368	{
275	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
278	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
279	}	373	}
280		374
281	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
282	}
283		376
284	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
285	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
286		379
287	#define LOAD(state) load_state((state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
288	#define SAVE(state,flags) save_state((state),(flags));	381	}
289		382
290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/ load & save, init *****************************************************/
291		384
292	static void	385	static void
293	load_state(Coro__State c)	386	load_perl (pTHX_ Coro__State c)
294	{	387	{
295	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
296	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
297		391
298	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
299	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
300	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
301	PL_stack_sp = c->stack_sp;	395	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		396
333	{	397	{
334	dSP;	398	dSP;
335	CV *cv;	399	CV *cv;
336		400
337	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
338	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
339	{	403	{
340	AV padlist = (AV )POPs;
341
342	if (padlist)
343	{
344	put_padlist (cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
345	CvPADLIST(cv) = padlist;	405	CvDEPTH (cv) = PTR2IV (POPs);
346	}	406	CvPADLIST (cv) = (AV *)POPs;
347
348	++CvDEPTH(cv);
349	}	407	}
350		408
351	PUTBACK;	409	PUTBACK;
352	}	410	}
353	}	411	}
354		412
355	static void	413	static void
356	save_state(Coro__State c, int flags)	414	save_perl (pTHX_ Coro__State c)
357	{	415	{
358	{	416	{
359	dSP;	417	dSP;
360	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
361	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
364	/*	422	/*
365	* the worst thing you can imagine happens first - we have to save	423	* the worst thing you can imagine happens first - we have to save
366	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
367	*/	425	*/
368		426
369	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
370	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
371	for (;;)	429	for (;;)
372	{	430	{
373	while (cxix >= 0)	431	while (cxix >= 0)
374	{	432	{
375	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
376		434
377	if (CxTYPE(cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
378	{	436	{
379	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
		438
380	if (CvDEPTH(cv))	439	if (CvDEPTH (cv))
381	{	440	{
382	EXTEND (SP, CvDEPTH(cv)*2);	441	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));	442	PUSHs ((SV *)CvPADLIST (cv));
		443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
392	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
393		445
		446	CvDEPTH (cv) = 0;
394	get_padlist (cv);	447	get_padlist (aTHX_ cv);
395	}	448	}
396	}	449	}
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	}	450	}
406		451
407	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
408	break;	453	break;
409		454
410	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
411	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
412	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
413	}	458	}
414		459
415	PUTBACK;	460	PUTBACK;
416	}	461	}
417		462
418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
420	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
		466	c->irssv_sv = GvSV (irsgv);
421		467
422	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
423	c->in_eval = PL_in_eval;	469	# include "state.h"
424		470	#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	}	471	}
456		472
457	/*	473	/*
458	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
459	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
460	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
461	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
462	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
463	static void	482	static void
464	coro_init_stacks ()	483	coro_init_stacks (pTHX)
465	{	484	{
466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	485	PL_curstackinfo = new_stackinfo(64, 6);
467	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
468	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
470		489
471	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
472	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
473	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
474		493
475	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
476	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
477	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
478	PL_tmps_max = 96;	497	PL_tmps_max = 64;
479		498
480	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
481	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
482	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
483		502
…		…
487		506
488	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
489	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
490	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
491		510
492	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
493	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
494	PL_savestack_max = 96;	513	PL_savestack_max = 64;
495		514
496	#if !PERL_VERSION_ATLEAST (5,9,0)	515	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
498	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	518	PL_retstack_max = 4;
500	#endif	519	#endif
501	}	520	}
		521	#endif
502		522
503	/*	523	/*
504	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
505	*/	525	*/
506	static void	526	static void
507	coro_destroy_stacks ()	527	coro_destroy_stacks (pTHX)
508	{	528	{
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)	529	while (PL_curstackinfo->si_next)
521	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
522		531
523	while (PL_curstackinfo)	532	while (PL_curstackinfo)
524	{	533	{
525	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
526		535
527	{ /D//remove/
528	dSP;
529	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
530	PUTBACK; /* possibly superfluous */
531	}
532
533	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
534	{
535	dounwind (-1);/D//remove/
536	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
537	}
538		538
539	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
540	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
541	PL_curstackinfo = p;	541	PL_curstackinfo = p;
542	}	542	}
…		…
548	#if !PERL_VERSION_ATLEAST (5,9,0)	548	#if !PERL_VERSION_ATLEAST (5,9,0)
549	Safefree (PL_retstack);	549	Safefree (PL_retstack);
550	#endif	550	#endif
551	}	551	}
552		552
553	static void	553	static size_t
554	setup_coro (struct coro *coro)	554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (*coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
		561	{
		562	#define VAR(name,type)coro->name = PL_ ## name;
		563	# include "state.h"
		564	#undef VAR
		565	}
		566
		567	rss += sizeof (coro->curstackinfo);
		568	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
		575
		576	#if !PERL_VERSION_ATLEAST (5,9,0)
		577	rss += coro->retstack_max * sizeof (OP *);
		578	#endif
		579	}
		580
		581	return rss;
		582	}
		583
		584	/ coroutine stack handling **********************************************/
		585
		586	static void
		587	coro_setup (pTHX_ struct coro *coro)
555	{	588	{
556	/*	589	/*
557	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
558	*/	591	*/
559
560	coro_init_stacks ();	592	coro_init_stacks (aTHX);
561		593
		594	PL_runops = RUNOPS_DEFAULT;
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
562	PL_curcop = 0;	597	PL_comppad = 0;
563	PL_in_eval = 0;
564	PL_curpm = 0;	598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	PL_defoutgv = (GV *)NEWSV (0, 0);
		612	gv_init (PL_defoutgv, coro_state_stash, "stdout", sizeof ("stdout") - 1, 0);
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) \|= IOf_FLUSH;
		616	GvIOp (PL_defoutgv) = io;
		617	}
565		618
566	{	619	{
567	dSP;	620	dSP;
568	LOGOP myop;	621	LOGOP myop;
569		622
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);	623	Zero (&myop, 1, LOGOP);
577	myop.op_next = Nullop;	624	myop.op_next = Nullop;
578	myop.op_flags = OPf_WANT_VOID;	625	myop.op_flags = OPf_WANT_VOID;
579		626
		627	PUSHMARK (SP);
		628	XPUSHs (av_shift (GvAV (PL_defgv)));
		629	PUTBACK;
580	PL_op = (OP *)&myop;	630	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);	631	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
586	SPAGAIN;	632	SPAGAIN;
587
588	ENTER; /* necessary e.g. for dounwind */
589	}	633	}
590	}
591		634
		635	ENTER; /* necessary e.g. for dounwind */
		636	}
		637
592	static void	638	static void
		639	coro_destroy (pTHX_ struct coro *coro)
		640	{
		641	if (!IN_DESTRUCT)
		642	{
		643	/* restore all saved variables and stuff */
		644	LEAVE_SCOPE (0);
		645	assert (PL_tmps_floor == -1);
		646
		647	/* free all temporaries */
		648	FREETMPS;
		649	assert (PL_tmps_ix == -1);
		650
		651	/* unwind all extra stacks */
		652	POPSTACK_TO (PL_mainstack);
		653
		654	/* unwind main stack */
		655	dounwind (-1);
		656	}
		657
		658	SvREFCNT_dec (GvSV (PL_defgv));
		659	SvREFCNT_dec (GvAV (PL_defgv));
		660	SvREFCNT_dec (GvSV (PL_errgv));
		661	SvREFCNT_dec (PL_defoutgv);
		662	SvREFCNT_dec (PL_rs);
		663	SvREFCNT_dec (GvSV (irsgv));
		664
		665	SvREFCNT_dec (coro->saved_deffh);
		666	//SvREFCNT_dec (coro->throw);
		667
		668	coro_destroy_stacks (aTHX);
		669	}
		670
		671	static void
593	free_coro_mortal ()	672	free_coro_mortal (pTHX)
594	{	673	{
595	if (coro_mortal)	674	if (coro_mortal)
596	{	675	{
597	SvREFCNT_dec (coro_mortal);	676	SvREFCNT_dec (coro_mortal);
598	coro_mortal = 0;	677	coro_mortal = 0;
599	}	678	}
600	}	679	}
601		680
		681	static int
		682	runops_trace (pTHX)
		683	{
		684	COP *oldcop = 0;
		685	int oldcxix = -2;
		686	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		687	coro_cctx *cctx = coro->cctx;
		688
		689	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		690	{
		691	PERL_ASYNC_CHECK ();
		692
		693	if (cctx->flags & CC_TRACE_ALL)
		694	{
		695	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		696	{
		697	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		698	SV bot, top;
		699	AV av = newAV (); / return values */
		700	SV **cb;
		701	dSP;
		702
		703	GV *gv = CvGV (cx->blk_sub.cv);
		704	SV *fullname = sv_2mortal (newSV (0));
		705	if (isGV (gv))
		706	gv_efullname3 (fullname, gv, 0);
		707
		708	bot = PL_stack_base + cx->blk_oldsp + 1;
		709	top = cx->blk_gimme == G_ARRAY ? SP + 1
		710	: cx->blk_gimme == G_SCALAR ? bot + 1
		711	: bot;
		712
		713	while (bot < top)
		714	av_push (av, SvREFCNT_inc (*bot++));
		715
		716	PL_runops = RUNOPS_DEFAULT;
		717	ENTER;
		718	SAVETMPS;
		719	EXTEND (SP, 3);
		720	PUSHMARK (SP);
		721	PUSHs (&PL_sv_no);
		722	PUSHs (fullname);
		723	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		724	PUTBACK;
		725	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		726	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		727	SPAGAIN;
		728	FREETMPS;
		729	LEAVE;
		730	PL_runops = runops_trace;
		731	}
		732
		733	if (oldcop != PL_curcop)
		734	{
		735	oldcop = PL_curcop;
		736
		737	if (PL_curcop != &PL_compiling)
		738	{
		739	SV **cb;
		740
		741	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		742	{
		743	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		744
		745	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		746	{
		747	runops_proc_t old_runops = PL_runops;
		748	dSP;
		749	GV *gv = CvGV (cx->blk_sub.cv);
		750	SV *fullname = sv_2mortal (newSV (0));
		751
		752	if (isGV (gv))
		753	gv_efullname3 (fullname, gv, 0);
		754
		755	PL_runops = RUNOPS_DEFAULT;
		756	ENTER;
		757	SAVETMPS;
		758	EXTEND (SP, 3);
		759	PUSHMARK (SP);
		760	PUSHs (&PL_sv_yes);
		761	PUSHs (fullname);
		762	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		763	PUTBACK;
		764	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		765	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		766	SPAGAIN;
		767	FREETMPS;
		768	LEAVE;
		769	PL_runops = runops_trace;
		770	}
		771
		772	oldcxix = cxstack_ix;
		773	}
		774
		775	if (cctx->flags & CC_TRACE_LINE)
		776	{
		777	dSP;
		778
		779	PL_runops = RUNOPS_DEFAULT;
		780	ENTER;
		781	SAVETMPS;
		782	EXTEND (SP, 3);
		783	PL_runops = RUNOPS_DEFAULT;
		784	PUSHMARK (SP);
		785	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		786	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		787	PUTBACK;
		788	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		789	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		790	SPAGAIN;
		791	FREETMPS;
		792	LEAVE;
		793	PL_runops = runops_trace;
		794	}
		795	}
		796	}
		797	}
		798	}
		799
		800	TAINT_NOT;
		801	return 0;
		802	}
		803
		804	/* inject a fake call to Coro::State::_cctx_init into the execution */
		805	/* _cctx_init should be careful, as it could be called at almost any time */
		806	/* during execution of a perl program */
602	static void NOINLINE	807	static void NOINLINE
603	prepare_cctx (coro_cctx *cctx)	808	prepare_cctx (pTHX_ coro_cctx *cctx)
604	{	809	{
605	dSP;	810	dSP;
606	LOGOP myop;	811	LOGOP myop;
607		812
		813	PL_top_env = &PL_start_env;
		814
		815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
		817
608	Zero (&myop, 1, LOGOP);	818	Zero (&myop, 1, LOGOP);
609	myop.op_next = PL_op;	819	myop.op_next = PL_op;
610	myop.op_flags = OPf_WANT_VOID;	820	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
611
612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613		821
614	PUSHMARK (SP);	822	PUSHMARK (SP);
		823	EXTEND (SP, 2);
		824	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	825	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
616	PUTBACK;	826	PUTBACK;
		827	PL_op = (OP *)&myop;
617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
618	SPAGAIN;	829	SPAGAIN;
619	}	830	}
620		831
		832	/*
		833	* this is a _very_ stripped down perl interpreter ;)
		834	*/
621	static void	835	static void
622	coro_run (void *arg)	836	coro_run (void *arg)
623	{	837	{
		838	dTHX;
		839
624	/* coro_run is the alternative epilogue of transfer() */	840	/* coro_run is the alternative tail of transfer(), so unlock here. */
625	UNLOCK;	841	UNLOCK;
626		842
		843	/* we now skip the entersub that lead to transfer() */
		844	PL_op = PL_op->op_next;
		845
		846	/* inject a fake subroutine call to cctx_init */
		847	prepare_cctx (aTHX_ (coro_cctx *)arg);
		848
		849	/* somebody or something will hit me for both perl_run and PL_restartop */
		850	PL_restartop = PL_op;
		851	perl_run (PL_curinterp);
		852
627	/*	853	/*
628	* this is a _very_ stripped down perl interpreter ;)	854	* If perl-run returns we assume exit() was being called or the coro
		855	* fell off the end, which seems to be the only valid (non-bug)
		856	* reason for perl_run to return. We try to exit by jumping to the
		857	* bootstrap-time "top" top_env, as we cannot restore the "main"
		858	* coroutine as Coro has no such concept
629	*/	859	*/
630	PL_top_env = &PL_start_env;	860	PL_top_env = main_top_env;
631	/* inject call to cctx_init */	861	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	}	862	}
640		863
641	static coro_cctx *	864	static coro_cctx *
642	cctx_new ()	865	cctx_new ()
643	{	866	{
644	coro_cctx *cctx;	867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
645		870
		871	++cctx_count;
		872
646	New (0, cctx, 1, coro_cctx);	873	Newz (0, cctx, 1, coro_cctx);
647		874
648	#if HAVE_MMAP	875	#if HAVE_MMAP
649		876
650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
651	/* mmap suppsedly does allocate-on-write for us */	878	/* 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);	879	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
653		880
654	if (cctx->sptr == (void *)-1)	881	if (cctx->sptr != (void *)-1)
655	{
656	perror ("FATAL: unable to mmap stack for coroutine");
657	_exit (EXIT_FAILURE);
658	}	882	{
659
660	# if STACKGUARD	883	# if CORO_STACKGUARD
661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	884	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
662	# endif	885	# endif
		886	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		887	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		888	cctx->flags \|= CC_MAPPED;
		889	}
		890	else
		891	#endif
		892	{
		893	cctx->ssize = coro_stacksize * (long)sizeof (long);
		894	New (0, cctx->sptr, coro_stacksize, long);
663		895
664	#else
665
666	cctx->ssize = STACKSIZE * (long)sizeof (long);
667	New (0, cctx->sptr, STACKSIZE, long);
668
669	if (!cctx->sptr)	896	if (!cctx->sptr)
670	{	897	{
671	perror ("FATAL: unable to malloc stack for coroutine");	898	perror ("FATAL: unable to allocate stack for coroutine");
672	_exit (EXIT_FAILURE);	899	_exit (EXIT_FAILURE);
673	}	900	}
674		901
675	#endif	902	stack_start = cctx->sptr;
		903	stack_size = cctx->ssize;
		904	}
676		905
677	#if USE_VALGRIND	906	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);	907	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
685		908
686	return cctx;	909	return cctx;
687	}	910	}
688		911
689	static void	912	static void
690	cctx_free (coro_cctx *cctx)	913	cctx_destroy (coro_cctx *cctx)
691	{	914	{
692	if (!cctx)	915	if (!cctx)
693	return;	916	return;
694		917
		918	--cctx_count;
		919
695	#if USE_VALGRIND	920	#if CORO_USE_VALGRIND
696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697	#endif	922	#endif
698		923
699	#if HAVE_MMAP	924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
700	munmap (cctx->sptr, cctx->ssize);	926	munmap (cctx->sptr, cctx->ssize);
701	#else	927	else
		928	#endif
702	Safefree (cctx->sptr);	929	Safefree (cctx->sptr);
703	#endif
704		930
705	Safefree (cctx);	931	Safefree (cctx);
706	}	932	}
707		933
708	static coro_cctx *cctx_first;
709	static int cctx_count, cctx_idle;
710
711	static coro_cctx *	934	static coro_cctx *
712	cctx_get ()	935	cctx_get (pTHX)
713	{	936	{
714	coro_cctx *cctx;
715
716	if (cctx_first)	937	while (cctx_first)
717	{	938	{
		939	coro_cctx *cctx = cctx_first;
		940	cctx_first = cctx->next;
718	--cctx_idle;	941	--cctx_idle;
719	cctx = cctx_first;	942
720	cctx_first = cctx->next;	943	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
721	}	944	return cctx;
722	else	945
723	{	946	cctx_destroy (cctx);
724	++cctx_count;
725	cctx = cctx_new ();
726	PL_op = PL_op->op_next;
727	}	947	}
728		948
729	return cctx;	949	return cctx_new ();
730	}	950	}
731		951
732	static void	952	static void
733	cctx_put (coro_cctx *cctx)	953	cctx_put (coro_cctx *cctx)
734	{	954	{
		955	/* free another cctx if overlimit */
		956	if (cctx_idle >= MAX_IDLE_CCTX)
		957	{
		958	coro_cctx *first = cctx_first;
		959	cctx_first = first->next;
		960	--cctx_idle;
		961
		962	cctx_destroy (first);
		963	}
		964
735	++cctx_idle;	965	++cctx_idle;
736	cctx->next = cctx_first;	966	cctx->next = cctx_first;
737	cctx_first = cctx;	967	cctx_first = cctx;
738	}	968	}
739		969
740	/* never call directly, always through the coro_state_transfer global variable */	970	/ coroutine switching ***************************************************/
		971
741	static void NOINLINE	972	static void NOINLINE
		973	transfer_check (pTHX_ struct coro prev, struct coro next)
		974	{
		975	if (prev != next)
		976	{
		977	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		978	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		979
		980	if (next->flags & CF_RUNNING)
		981	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		982
		983	if (next->flags & CF_DESTROYED)
		984	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		985
		986	if (PL_lex_state != LEX_NOTPARSING)
		987	croak ("Coro::State::transfer called while parsing, but this is not supported");
		988	}
		989	}
		990
		991	/* always use the TRANSFER macro */
		992	static void NOINLINE
742	transfer (struct coro prev, struct coro next, int flags)	993	transfer (pTHX_ struct coro prev, struct coro next)
743	{	994	{
744	dSTACKLEVEL;	995	dSTACKLEVEL;
745		996
746	/* sometimes transfer is only called to set idle_sp */	997	/* sometimes transfer is only called to set idle_sp */
747	if (flags == TRANSFER_SET_STACKLEVEL)	998	if (!next)
		999	{
748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1000	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1001	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1002	}
749	else if (prev != next)	1003	else if (prev != next)
750	{	1004	{
751	coro_cctx *prev__cctx;	1005	coro_cctx *prev__cctx;
752		1006
		1007	if (prev->flags & CF_NEW)
		1008	{
		1009	/* create a new empty context */
		1010	Newz (0, prev->cctx, 1, coro_cctx);
		1011	prev->flags &= ~CF_NEW;
		1012	prev->flags \|= CF_RUNNING;
		1013	}
		1014
		1015	prev->flags &= ~CF_RUNNING;
		1016	next->flags \|= CF_RUNNING;
		1017
753	LOCK;	1018	LOCK;
754		1019
755	if (next->mainstack)	1020	if (next->flags & CF_NEW)
756	{	1021	{
757	/* coroutine already started */	1022	/* need to start coroutine */
758	SAVE (prev, flags);	1023	next->flags &= ~CF_NEW;
759	LOAD (next);	1024	/* first get rid of the old state */
		1025	save_perl (aTHX_ prev);
		1026	/* setup coroutine call */
		1027	coro_setup (aTHX_ next);
760	}	1028	}
761	else	1029	else
762	{	1030	{
763	/* need to start coroutine */	1031	/* coroutine already started */
764	/* first get rid of the old state */	1032	save_perl (aTHX_ prev);
765	SAVE (prev, -1);	1033	load_perl (aTHX_ next);
766	/* setup coroutine call */
767	setup_coro (next);
768	/* need a stack */
769	next->cctx = 0;
770	}	1034	}
771		1035
772	if (!prev->cctx)
773	/* create a new empty context */
774	Newz (0, prev->cctx, 1, coro_cctx);
775
776	prev__cctx = prev->cctx;	1036	prev__cctx = prev->cctx;
777		1037
778	/* possibly "free" the cctx */	1038	/* possibly "free" the cctx */
779	if (prev__cctx->idle_sp == STACKLEVEL)	1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
780	{	1040	{
		1041	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1042	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1043
		1044	prev->cctx = 0;
		1045
781	cctx_put (prev__cctx);	1046	cctx_put (prev__cctx);
782	prev->cctx = 0;
783	}	1047	}
784		1048
		1049	++next->usecount;
		1050
785	if (!next->cctx)	1051	if (!next->cctx)
786	next->cctx = cctx_get ();	1052	next->cctx = cctx_get (aTHX);
787		1053
788	if (prev__cctx != next->cctx)	1054	if (prev__cctx != next->cctx)
789	{	1055	{
790	prev__cctx->top_env = PL_top_env;	1056	prev__cctx->top_env = PL_top_env;
791	PL_top_env = next->cctx->top_env;	1057	PL_top_env = next->cctx->top_env;
792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793	}	1059	}
794		1060
795	free_coro_mortal ();	1061	free_coro_mortal (aTHX);
796
797	UNLOCK;	1062	UNLOCK;
798	}	1063	}
799	}	1064	}
800		1065
801	struct transfer_args	1066	struct transfer_args
802	{	1067	{
803	struct coro prev, next;	1068	struct coro prev, next;
804	int flags;
805	};	1069	};
806		1070
807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1071	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1072	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
808		1073
		1074	/ high level stuff ******************************************************/
		1075
809	static void	1076	static int
810	coro_state_destroy (struct coro *coro)	1077	coro_state_destroy (pTHX_ struct coro *coro)
811	{	1078	{
812	if (coro->refcnt--)	1079	if (coro->flags & CF_DESTROYED)
813	return;	1080	return 0;
		1081
		1082	coro->flags \|= CF_DESTROYED;
		1083
		1084	if (coro->flags & CF_READY)
		1085	{
		1086	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1087	/* alternative: look through all ready queues and remove the coro */
		1088	LOCK;
		1089	--coro_nready;
		1090	UNLOCK;
		1091	}
		1092	else
		1093	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
814		1094
815	if (coro->mainstack && coro->mainstack != main_mainstack)	1095	if (coro->mainstack && coro->mainstack != main_mainstack)
816	{	1096	{
817	struct coro temp;	1097	struct coro temp;
818		1098
819	SAVE ((&temp), TRANSFER_SAVE_ALL);	1099	if (coro->flags & CF_RUNNING)
820	LOAD (coro);	1100	croak ("FATAL: tried to destroy currently running coroutine");
821		1101
822	coro_destroy_stacks ();	1102	save_perl (aTHX_ &temp);
		1103	load_perl (aTHX_ coro);
823		1104
		1105	coro_destroy (aTHX_ coro);
		1106
824	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
825		1108
826	coro->mainstack = 0;	1109	coro->mainstack = 0;
827	}	1110	}
828		1111
829	cctx_free (coro->cctx);	1112	cctx_destroy (coro->cctx);
830	SvREFCNT_dec (coro->args);	1113	SvREFCNT_dec (coro->args);
831	Safefree (coro);	1114
		1115	if (coro->next) coro->next->prev = coro->prev;
		1116	if (coro->prev) coro->prev->next = coro->next;
		1117	if (coro == coro_first) coro_first = coro->next;
		1118
		1119	return 1;
832	}	1120	}
833		1121
834	static int	1122	static int
835	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1123	coro_state_free (pTHX_ SV sv, MAGIC mg)
836	{	1124	{
837	struct coro coro = (struct coro )mg->mg_ptr;	1125	struct coro coro = (struct coro )mg->mg_ptr;
838	mg->mg_ptr = 0;	1126	mg->mg_ptr = 0;
839		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
840	coro_state_destroy (coro);	1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
841		1135
842	return 0;	1136	return 0;
843	}	1137	}
844		1138
845	static int	1139	static int
…		…
852	return 0;	1146	return 0;
853	}	1147	}
854		1148
855	static MGVTBL coro_state_vtbl = {	1149	static MGVTBL coro_state_vtbl = {
856	0, 0, 0, 0,	1150	0, 0, 0, 0,
857	coro_state_clear,	1151	coro_state_free,
858	0,	1152	0,
859	#ifdef MGf_DUP	1153	#ifdef MGf_DUP
860	coro_state_dup,	1154	coro_state_dup,
861	#else	1155	#else
862	# define MGf_DUP 0	1156	# define MGf_DUP 0
863	#endif	1157	#endif
864	};	1158	};
865		1159
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	1160	static void
889	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1161	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
890	{	1162	{
891	ta->prev = SvSTATE (prev);	1163	ta->prev = SvSTATE (prev_sv);
892	ta->next = SvSTATE (next);	1164	ta->next = SvSTATE (next_sv);
893	ta->flags = flags;	1165	TRANSFER_CHECK (*ta);
894	}	1166	}
895		1167
896	static void	1168	static void
897	api_transfer (SV prev, SV next, int flags)	1169	api_transfer (SV prev_sv, SV next_sv)
898	{	1170	{
899	dTHX;	1171	dTHX;
900	struct transfer_args ta;	1172	struct transfer_args ta;
901		1173
902	prepare_transfer (&ta, prev, next, flags);	1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
903	TRANSFER (ta);	1175	TRANSFER (ta);
904	}	1176	}
905		1177
906	/ Coro ******************************************************************/	1178	/ Coro ******************************************************************/
907		1179
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	1180	static void
921	coro_enq (SV *sv)	1181	coro_enq (pTHX_ SV *coro_sv)
922	{	1182	{
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);	1183	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
931	coro_nready++;
932	}	1184	}
933		1185
934	static SV *	1186	static SV *
935	coro_deq (int min_prio)	1187	coro_deq (pTHX_ int min_prio)
936	{	1188	{
937	int prio = PRIO_MAX - PRIO_MIN;	1189	int prio = PRIO_MAX - PRIO_MIN;
938		1190
939	min_prio -= PRIO_MIN;	1191	min_prio -= PRIO_MIN;
940	if (min_prio < 0)	1192	if (min_prio < 0)
941	min_prio = 0;	1193	min_prio = 0;
942		1194
943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
944	if (AvFILLp (coro_ready [prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
945	{
946	coro_nready--;
947	return av_shift (coro_ready [prio]);	1197	return av_shift (coro_ready [prio]);
948	}
949		1198
950	return 0;	1199	return 0;
951	}	1200	}
952		1201
953	static void	1202	static int
954	api_ready (SV *coro)	1203	api_ready (SV *coro_sv)
955	{	1204	{
956	dTHX;	1205	dTHX;
		1206	struct coro *coro;
957		1207
958	if (SvROK (coro))	1208	if (SvROK (coro_sv))
959	coro = SvRV (coro);	1209	coro_sv = SvRV (coro_sv);
		1210
		1211	coro = SvSTATE (coro_sv);
		1212
		1213	if (coro->flags & CF_READY)
		1214	return 0;
		1215
		1216	coro->flags \|= CF_READY;
960		1217
961	LOCK;	1218	LOCK;
962	coro_enq (SvREFCNT_inc (coro));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1220	++coro_nready;
963	UNLOCK;	1221	UNLOCK;
964	}
965		1222
		1223	return 1;
		1224	}
		1225
966	static void	1226	static int
		1227	api_is_ready (SV *coro_sv)
		1228	{
		1229	dTHX;
		1230	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1231	}
		1232
		1233	static void
967	prepare_schedule (struct transfer_args *ta)	1234	prepare_schedule (pTHX_ struct transfer_args *ta)
968	{	1235	{
969	SV current, prev, *next;	1236	SV prev_sv, next_sv;
970
971	current = GvSV (coro_current);
972		1237
973	for (;;)	1238	for (;;)
974	{	1239	{
975	LOCK;	1240	LOCK;
976	next = coro_deq (PRIO_MIN);	1241	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1242
		1243	/* nothing to schedule: call the idle handler */
		1244	if (!next_sv)
		1245	{
		1246	dSP;
		1247	UNLOCK;
		1248
		1249	ENTER;
		1250	SAVETMPS;
		1251
		1252	PUSHMARK (SP);
		1253	PUTBACK;
		1254	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1255
		1256	FREETMPS;
		1257	LEAVE;
		1258	continue;
		1259	}
		1260
		1261	ta->next = SvSTATE (next_sv);
		1262
		1263	/* cannot transfer to destroyed coros, skip and look for next */
		1264	if (ta->next->flags & CF_DESTROYED)
		1265	{
		1266	UNLOCK;
		1267	SvREFCNT_dec (next_sv);
		1268	/* coro_nready is already taken care of by destroy */
		1269	continue;
		1270	}
		1271
		1272	--coro_nready;
977	UNLOCK;	1273	UNLOCK;
978
979	if (next)
980	break;	1274	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	}	1275	}
995	}
996
997	prev = SvRV (current);
998	SvRV (current) = next;
999		1276
1000	/* free this only after the transfer */	1277	/* free this only after the transfer */
		1278	prev_sv = SvRV (coro_current);
		1279	ta->prev = SvSTATE (prev_sv);
		1280	TRANSFER_CHECK (*ta);
		1281	assert (ta->next->flags & CF_READY);
		1282	ta->next->flags &= ~CF_READY;
		1283	SvRV_set (coro_current, next_sv);
		1284
1001	LOCK;	1285	LOCK;
1002	free_coro_mortal ();	1286	free_coro_mortal (aTHX);
		1287	coro_mortal = prev_sv;
1003	UNLOCK;	1288	UNLOCK;
1004	coro_mortal = prev;
1005
1006	ta->prev = SvSTATE (prev);
1007	ta->next = SvSTATE (next);
1008	ta->flags = TRANSFER_SAVE_ALL;
1009	}	1289	}
1010		1290
1011	static void	1291	static void
1012	prepare_cede (struct transfer_args *ta)	1292	prepare_cede (pTHX_ struct transfer_args *ta)
1013	{	1293	{
1014	LOCK;	1294	api_ready (coro_current);
1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016	UNLOCK;
1017
1018	prepare_schedule (ta);	1295	prepare_schedule (aTHX_ ta);
		1296	}
		1297
		1298	static int
		1299	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1300	{
		1301	if (coro_nready)
		1302	{
		1303	SV *prev = SvRV (coro_current);
		1304	prepare_schedule (aTHX_ ta);
		1305	api_ready (prev);
		1306	return 1;
		1307	}
		1308	else
		1309	return 0;
1019	}	1310	}
1020		1311
1021	static void	1312	static void
1022	api_schedule (void)	1313	api_schedule (void)
1023	{	1314	{
1024	dTHX;	1315	dTHX;
1025	struct transfer_args ta;	1316	struct transfer_args ta;
1026		1317
1027	prepare_schedule (&ta);	1318	prepare_schedule (aTHX_ &ta);
1028	TRANSFER (ta);	1319	TRANSFER (ta);
1029	}	1320	}
1030		1321
1031	static void	1322	static int
1032	api_cede (void)	1323	api_cede (void)
1033	{	1324	{
1034	dTHX;	1325	dTHX;
1035	struct transfer_args ta;	1326	struct transfer_args ta;
1036		1327
1037	prepare_cede (&ta);	1328	prepare_cede (aTHX_ &ta);
		1329
		1330	if (ta.prev != ta.next)
		1331	{
1038	TRANSFER (ta);	1332	TRANSFER (ta);
		1333	return 1;
		1334	}
		1335	else
		1336	return 0;
1039	}	1337	}
1040		1338
		1339	static int
		1340	api_cede_notself (void)
		1341	{
		1342	dTHX;
		1343	struct transfer_args ta;
		1344
		1345	if (prepare_cede_notself (aTHX_ &ta))
		1346	{
		1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
		1352	}
		1353
		1354	static void
		1355	api_trace (SV *coro_sv, int flags)
		1356	{
		1357	dTHX;
		1358	struct coro *coro = SvSTATE (coro_sv);
		1359
		1360	if (flags & CC_TRACE)
		1361	{
		1362	if (!coro->cctx)
		1363	coro->cctx = cctx_new ();
		1364	else if (!(coro->cctx->flags & CC_TRACE))
		1365	croak ("cannot enable tracing on coroutine with custom stack");
		1366
		1367	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1368	}
		1369	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1370	{
		1371	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1372
		1373	if (coro->flags & CF_RUNNING)
		1374	PL_runops = RUNOPS_DEFAULT;
		1375	else
		1376	coro->runops = RUNOPS_DEFAULT;
		1377	}
		1378	}
		1379
1041	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1042		1381
1043	PROTOTYPES: DISABLE	1382	PROTOTYPES: DISABLE
1044		1383
1045	BOOT:	1384	BOOT:
1046	{	1385	{
1047	#ifdef USE_ITHREADS	1386	#ifdef USE_ITHREADS
1048	MUTEX_INIT (&coro_mutex);	1387	MUTEX_INIT (&coro_mutex);
1049	#endif	1388	#endif
1050	BOOT_PAGESIZE;	1389	BOOT_PAGESIZE;
1051		1390
		1391	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1392
1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1393	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1053		1394
1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1057		1399
1058	main_mainstack = PL_mainstack;	1400	main_mainstack = PL_mainstack;
		1401	main_top_env = PL_top_env;
		1402
		1403	while (main_top_env->je_prev)
		1404	main_top_env = main_top_env->je_prev;
1059		1405
1060	coroapi.ver = CORO_API_VERSION;	1406	coroapi.ver = CORO_API_VERSION;
1061	coroapi.transfer = api_transfer;	1407	coroapi.transfer = api_transfer;
1062		1408
1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1409	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1070	struct coro *coro;	1416	struct coro *coro;
1071	HV *hv;	1417	HV *hv;
1072	int i;	1418	int i;
1073		1419
1074	Newz (0, coro, 1, struct coro);	1420	Newz (0, coro, 1, struct coro);
1075	coro->args = newAV ();	1421	coro->args = newAV ();
		1422	coro->flags = CF_NEW;
1076		1423
		1424	if (coro_first) coro_first->prev = coro;
		1425	coro->next = coro_first;
		1426	coro_first = coro;
		1427
1077	hv = newHV ();	1428	coro->hv = hv = newHV ();
1078	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1429	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));	1430	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1080		1431
1081	for (i = 1; i < items; i++)	1432	for (i = 1; i < items; i++)
1082	av_push (coro->args, newSVsv (ST (i)));	1433	av_push (coro->args, newSVsv (ST (i)));
1083	}	1434	}
1084	OUTPUT:	1435	OUTPUT:
1085	RETVAL	1436	RETVAL
1086		1437
		1438	# these not obviously related functions are all rolled into the same xs
		1439	# function to increase chances that they all will call transfer with the same
		1440	# stack offset
1087	void	1441	void
1088	_set_stacklevel (...)	1442	_set_stacklevel (...)
1089	ALIAS:	1443	ALIAS:
1090	Coro::State::transfer = 1	1444	Coro::State::transfer = 1
1091	Coro::schedule = 2	1445	Coro::schedule = 2
1092	Coro::cede = 3	1446	Coro::cede = 3
1093	Coro::Cont::yield = 4	1447	Coro::cede_notself = 4
1094	CODE:	1448	CODE:
1095	{	1449	{
1096	struct transfer_args ta;	1450	struct transfer_args ta;
1097		1451
1098	switch (ix)	1452	switch (ix)
1099	{	1453	{
1100	case 0:	1454	case 0:
1101	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1455	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1102	ta.next = 0;	1456	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1457	break;
1105		1458
1106	case 1:	1459	case 1:
1107	if (items != 3)	1460	if (items != 2)
1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1461	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109		1462
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1463	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111	break;	1464	break;
1112		1465
1113	case 2:	1466	case 2:
1114	prepare_schedule (&ta);	1467	prepare_schedule (aTHX_ &ta);
1115	break;	1468	break;
1116		1469
1117	case 3:	1470	case 3:
1118	prepare_cede (&ta);	1471	prepare_cede (aTHX_ &ta);
1119	break;	1472	break;
1120		1473
1121	case 4:	1474	case 4:
1122	{	1475	if (!prepare_cede_notself (aTHX_ &ta))
1123	SV *yieldstack;	1476	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1477
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;	1478	break;
1146
1147	}	1479	}
1148		1480
		1481	BARRIER;
1149	TRANSFER (ta);	1482	TRANSFER (ta);
1150	}
1151		1483
1152	void	1484	if (GIMME_V != G_VOID && ta.next != ta.prev)
1153	_clone_state_from (SV dst, SV src)	1485	XSRETURN_YES;
		1486	}
		1487
		1488	bool
		1489	_destroy (SV *coro_sv)
1154	CODE:	1490	CODE:
1155	{	1491	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1492	OUTPUT:
1157		1493	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		1494
1164	void	1495	void
1165	_exit (code)	1496	_exit (code)
1166	int code	1497	int code
1167	PROTOTYPE: $	1498	PROTOTYPE: $
1168	CODE:	1499	CODE:
1169	_exit (code);	1500	_exit (code);
1170		1501
1171	int	1502	int
		1503	cctx_stacksize (int new_stacksize = 0)
		1504	CODE:
		1505	RETVAL = coro_stacksize;
		1506	if (new_stacksize)
		1507	coro_stacksize = new_stacksize;
		1508	OUTPUT:
		1509	RETVAL
		1510
		1511	int
1172	cctx_count ()	1512	cctx_count ()
1173	CODE:	1513	CODE:
1174	RETVAL = cctx_count;	1514	RETVAL = cctx_count;
1175	OUTPUT:	1515	OUTPUT:
1176	RETVAL	1516	RETVAL
…		…
1180	CODE:	1520	CODE:
1181	RETVAL = cctx_idle;	1521	RETVAL = cctx_idle;
1182	OUTPUT:	1522	OUTPUT:
1183	RETVAL	1523	RETVAL
1184		1524
		1525	void
		1526	list ()
		1527	PPCODE:
		1528	{
		1529	struct coro *coro;
		1530	for (coro = coro_first; coro; coro = coro->next)
		1531	if (coro->hv)
		1532	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1533	}
		1534
		1535	void
		1536	call (Coro::State coro, SV *coderef)
		1537	ALIAS:
		1538	eval = 1
		1539	CODE:
		1540	{
		1541	if (coro->mainstack)
		1542	{
		1543	struct coro temp;
		1544	Zero (&temp, 1, struct coro);
		1545
		1546	if (!(coro->flags & CF_RUNNING))
		1547	{
		1548	save_perl (aTHX_ &temp);
		1549	load_perl (aTHX_ coro);
		1550	}
		1551
		1552	{
		1553	dSP;
		1554	ENTER;
		1555	SAVETMPS;
		1556	PUSHMARK (SP);
		1557	PUTBACK;
		1558	if (ix)
		1559	eval_sv (coderef, 0);
		1560	else
		1561	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1562	SPAGAIN;
		1563	FREETMPS;
		1564	LEAVE;
		1565	PUTBACK;
		1566	}
		1567
		1568	if (!(coro->flags & CF_RUNNING))
		1569	{
		1570	save_perl (aTHX_ coro);
		1571	load_perl (aTHX_ &temp);
		1572	}
		1573	}
		1574	}
		1575
		1576	SV *
		1577	is_ready (Coro::State coro)
		1578	PROTOTYPE: $
		1579	ALIAS:
		1580	is_ready = CF_READY
		1581	is_running = CF_RUNNING
		1582	is_new = CF_NEW
		1583	is_destroyed = CF_DESTROYED
		1584	CODE:
		1585	RETVAL = boolSV (coro->flags & ix);
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	void
		1590	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1591
		1592	SV *
		1593	has_stack (Coro::State coro)
		1594	PROTOTYPE: $
		1595	CODE:
		1596	RETVAL = boolSV (!!coro->cctx);
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	int
		1601	is_traced (Coro::State coro)
		1602	PROTOTYPE: $
		1603	CODE:
		1604	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1605	OUTPUT:
		1606	RETVAL
		1607
		1608	IV
		1609	rss (Coro::State coro)
		1610	PROTOTYPE: $
		1611	ALIAS:
		1612	usecount = 1
		1613	CODE:
		1614	switch (ix)
		1615	{
		1616	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1617	case 1: RETVAL = coro->usecount; break;
		1618	}
		1619	OUTPUT:
		1620	RETVAL
		1621
		1622
1185	MODULE = Coro::State PACKAGE = Coro	1623	MODULE = Coro::State PACKAGE = Coro
1186		1624
1187	BOOT:	1625	BOOT:
1188	{	1626	{
1189	int i;	1627	int i;
		1628
		1629	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1630	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1631	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1632
		1633	coro_current = get_sv ("Coro::current", FALSE);
		1634	SvREADONLY_on (coro_current);
1190		1635
1191	coro_stash = gv_stashpv ("Coro", TRUE);	1636	coro_stash = gv_stashpv ("Coro", TRUE);
1192		1637
1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1638	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1639	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1640	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1641	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1642	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1643	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1199		1644
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--; )	1645	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1204	coro_ready[i] = newAV ();	1646	coro_ready[i] = newAV ();
1205		1647
1206	{	1648	{
1207	SV *sv = perl_get_sv("Coro::API", 1);	1649	SV *sv = perl_get_sv("Coro::API", 1);
1208		1650
1209	coroapi.schedule = api_schedule;	1651	coroapi.schedule = api_schedule;
1210	coroapi.cede = api_cede;	1652	coroapi.cede = api_cede;
		1653	coroapi.cede_notself = api_cede_notself;
1211	coroapi.ready = api_ready;	1654	coroapi.ready = api_ready;
		1655	coroapi.is_ready = api_is_ready;
1212	coroapi.nready = &coro_nready;	1656	coroapi.nready = &coro_nready;
1213	coroapi.current = coro_current;	1657	coroapi.current = coro_current;
1214		1658
1215	GCoroAPI = &coroapi;	1659	GCoroAPI = &coroapi;
1216	sv_setiv (sv, (IV)&coroapi);	1660	sv_setiv (sv, (IV)&coroapi);
1217	SvREADONLY_on (sv);	1661	SvREADONLY_on (sv);
1218	}	1662	}
1219	}	1663	}
		1664
		1665	void
		1666	_set_current (SV *current)
		1667	PROTOTYPE: $
		1668	CODE:
		1669	SvREFCNT_dec (SvRV (coro_current));
		1670	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1220		1671
1221	int	1672	int
1222	prio (Coro::State coro, int newprio = 0)	1673	prio (Coro::State coro, int newprio = 0)
1223	ALIAS:	1674	ALIAS:
1224	nice = 1	1675	nice = 1
…		…
1227	RETVAL = coro->prio;	1678	RETVAL = coro->prio;
1228		1679
1229	if (items > 1)	1680	if (items > 1)
1230	{	1681	{
1231	if (ix)	1682	if (ix)
1232	newprio += coro->prio;	1683	newprio = coro->prio - newprio;
1233		1684
1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1685	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1686	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1236		1687
1237	coro->prio = newprio;	1688	coro->prio = newprio;
1238	}	1689	}
1239	}	1690	}
		1691	OUTPUT:
		1692	RETVAL
1240		1693
1241	void	1694	SV *
1242	ready (SV *self)	1695	ready (SV *self)
1243	PROTOTYPE: $	1696	PROTOTYPE: $
1244	CODE:	1697	CODE:
1245	api_ready (self);	1698	RETVAL = boolSV (api_ready (self));
		1699	OUTPUT:
		1700	RETVAL
1246		1701
1247	int	1702	int
1248	nready (...)	1703	nready (...)
1249	PROTOTYPE:	1704	PROTOTYPE:
1250	CODE:	1705	CODE:
1251	RETVAL = coro_nready;	1706	RETVAL = coro_nready;
1252	OUTPUT:	1707	OUTPUT:
1253	RETVAL	1708	RETVAL
1254		1709
		1710	# for async_pool speedup
		1711	void
		1712	_pool_1 (SV *cb)
		1713	CODE:
		1714	{
		1715	struct coro *coro = SvSTATE (coro_current);
		1716	HV hv = (HV )SvRV (coro_current);
		1717	AV *defav = GvAV (PL_defgv);
		1718	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1719	AV *invoke_av;
		1720	int i, len;
		1721
		1722	if (!invoke)
		1723	croak ("\3terminate\2\n");
		1724
		1725	SvREFCNT_dec (coro->saved_deffh);
		1726	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1727
		1728	hv_store (hv, "desc", sizeof ("desc") - 1,
		1729	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1730
		1731	invoke_av = (AV *)SvRV (invoke);
		1732	len = av_len (invoke_av);
		1733
		1734	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1735
		1736	if (len > 0)
		1737	{
		1738	av_fill (defav, len - 1);
		1739	for (i = 0; i < len; ++i)
		1740	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1741	}
		1742
		1743	SvREFCNT_dec (invoke);
		1744	}
		1745
		1746	void
		1747	_pool_2 (SV *cb)
		1748	CODE:
		1749	{
		1750	struct coro *coro = SvSTATE (coro_current);
		1751
		1752	sv_setsv (cb, &PL_sv_undef);
		1753
		1754	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1755	coro->saved_deffh = 0;
		1756
		1757	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1758	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1759	croak ("\3terminate\2\n");
		1760
		1761	av_clear (GvAV (PL_defgv));
		1762	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1763	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1764
		1765	coro->prio = 0;
		1766
		1767	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1768	api_trace (coro_current, 0);
		1769
		1770	av_push (av_async_pool, newSVsv (coro_current));
		1771	}
		1772
		1773
1255	MODULE = Coro::State PACKAGE = Coro::AIO	1774	MODULE = Coro::State PACKAGE = Coro::AIO
1256		1775
1257	SV *	1776	SV *
1258	_get_state ()	1777	_get_state ()
1259	CODE:	1778	CODE:
1260	{	1779	{
1261	struct {	1780	struct io_state *data;
1262	int errorno;
1263	int laststype;
1264	int laststatval;
1265	Stat_t statcache;
1266	} data;
1267		1781
		1782	RETVAL = newSV (sizeof (struct io_state));
		1783	data = (struct io_state *)SvPVX (RETVAL);
		1784	SvCUR_set (RETVAL, sizeof (struct io_state));
		1785	SvPOK_only (RETVAL);
		1786
1268	data.errorno = errno;	1787	data->errorno = errno;
1269	data.laststype = PL_laststype;	1788	data->laststype = PL_laststype;
1270	data.laststatval = PL_laststatval;	1789	data->laststatval = PL_laststatval;
1271	data.statcache = PL_statcache;	1790	data->statcache = PL_statcache;
1272
1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
1274	}	1791	}
1275	OUTPUT:	1792	OUTPUT:
1276	RETVAL	1793	RETVAL
1277		1794
1278	void	1795	void
1279	_set_state (char *data_)	1796	_set_state (char *data_)
1280	PROTOTYPE: $	1797	PROTOTYPE: $
1281	CODE:	1798	CODE:
1282	{	1799	{
1283	struct {	1800	struct io_state data = (void )data_;
1284	int errorno;
1285	int laststype;
1286	int laststatval;
1287	Stat_t statcache;
1288	} data = (void )data_;
1289		1801
1290	errno = data->errorno;	1802	errno = data->errorno;
1291	PL_laststype = data->laststype;	1803	PL_laststype = data->laststype;
1292	PL_laststatval = data->laststatval;	1804	PL_laststatval = data->laststatval;
1293	PL_statcache = data->statcache;	1805	PL_statcache = data->statcache;
1294	}	1806	}
		1807

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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 1.186 by root, Fri Oct 5 20:10:42 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 1.186 by root, Fri Oct 5 20:10:42 2007 UTC