[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 1.180 by root, Wed Oct 3 17:12:20 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	IO 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 switches 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
		211	/* linked list */
		212	struct coro next, prev;
		213	HV hv; / the perl hash associated with this coro, if any */
176	};	214	};
177		215
178	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
179	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
180		218
		219	/ Coro ******************************************************************/
		220
		221	#define PRIO_MAX 3
		222	#define PRIO_HIGH 1
		223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/ lowlevel stuff ********************************************************/
		235
181	static AV *	236	static AV *
182	coro_clone_padlist (CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
183	{	238	{
184	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
185	AV newpadlist, newpad;	240	AV newpadlist, newpad;
186		241
187	newpadlist = newAV ();	242	newpadlist = newAV ();
…		…
199		254
200	return newpadlist;	255	return newpadlist;
201	}	256	}
202		257
203	static void	258	static void
204	free_padlist (AV *padlist)	259	free_padlist (pTHX_ AV *padlist)
205	{	260	{
206	/* may be during global destruction */	261	/* may be during global destruction */
207	if (SvREFCNT (padlist))	262	if (SvREFCNT (padlist))
208	{	263	{
209	I32 i = AvFILLp (padlist);	264	I32 i = AvFILLp (padlist);
…		…
230	AV *padlist;	285	AV *padlist;
231	AV av = (AV )mg->mg_obj;	286	AV av = (AV )mg->mg_obj;
232		287
233	/* casting is fun. */	288	/* casting is fun. */
234	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	289	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
235	free_padlist (padlist);	290	free_padlist (aTHX_ padlist);
236		291
237	SvREFCNT_dec (av);	292	SvREFCNT_dec (av);
238		293
239	return 0;	294	return 0;
240	}	295	}
241		296
242	#define PERL_MAGIC_coro PERL_MAGIC_ext	297	#define PERL_MAGIC_coro PERL_MAGIC_ext
243		298
244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	299	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
245		300
		301	#define CORO_MAGIC(cv) \
		302	SvMAGIC (cv) \
		303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		304	? SvMAGIC (cv) \
		305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		306	: 0
		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		333
246	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
247	static void	335	static void
248	get_padlist (CV *cv)	336	get_padlist (pTHX_ CV *cv)
249	{	337	{
250	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	338	MAGIC *mg = CORO_MAGIC (cv);
		339	AV *av;
251		340
252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
253	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
254	else	343	else
255	{	344	{
256	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
257	/* this is probably cleaner, but also slower? */	346	/* this is probably cleaner, but also slower? */
258	CV *cp = Perl_cv_clone (cv);	347	CV *cp = Perl_cv_clone (cv);
259	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
260	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
261	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
262	#else	351	#else
263	CvPADLIST (cv) = coro_clone_padlist (cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
264	#endif	353	#endif
265	}	354	}
266	}	355	}
267		356
268	static void	357	static void
269	put_padlist (CV *cv)	358	put_padlist (pTHX_ CV *cv)
270	{	359	{
271	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	360	MAGIC *mg = CORO_MAGIC (cv);
		361	AV *av;
272		362
273	if (!mg)	363	if (!mg)
274	{	364	{
275	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	365	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	366	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277	mg->mg_virtual = &vtbl_coro;	367	mg->mg_virtual = &vtbl_coro;
278	mg->mg_obj = (SV *)newAV ();	368	mg->mg_obj = (SV *)newAV ();
279	}	369	}
280		370
281	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	371	av = (AV *)mg->mg_obj;
282	}
283		372
284	#define SB do {	373	if (AvFILLp (av) >= AvMAX (av))
285	#define SE } while (0)	374	av_extend (av, AvMAX (av) + 1);
286		375
287	#define LOAD(state) load_state((state));	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
288	#define SAVE(state,flags) save_state((state),(flags));	377	}
289		378
290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	379	/ load & save, init *****************************************************/
291		380
292	static void	381	static void
293	load_state(Coro__State c)	382	load_perl (pTHX_ Coro__State c)
294	{	383	{
295	PL_dowarn = c->dowarn;	384	#define VAR(name,type) PL_ ## name = c->name;
296	PL_in_eval = c->in_eval;	385	# include "state.h"
		386	#undef VAR
297		387
298	PL_curstackinfo = c->curstackinfo;	388	GvSV (PL_defgv) = c->defsv;
299	PL_curstack = c->curstack;	389	GvAV (PL_defgv) = c->defav;
300	PL_mainstack = c->mainstack;	390	GvSV (PL_errgv) = c->errsv;
301	PL_stack_sp = c->stack_sp;	391	PL_defoutgv = c->deffh;
302	PL_op = c->op;	392	PL_rs = c->irssv;
303	PL_curpad = c->curpad;	393	GvSV (irsgv) = c->irssv_sv;
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		394
333	{	395	{
334	dSP;	396	dSP;
335	CV *cv;	397	CV *cv;
336		398
337	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
338	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
339	{	401	{
340	AV padlist = (AV )POPs;
341
342	if (padlist)
343	{
344	put_padlist (cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
345	CvPADLIST(cv) = padlist;	403	CvDEPTH (cv) = PTR2IV (POPs);
346	}	404	CvPADLIST (cv) = (AV *)POPs;
347
348	++CvDEPTH(cv);
349	}	405	}
350		406
351	PUTBACK;	407	PUTBACK;
352	}	408	}
353	}	409	}
354		410
355	static void	411	static void
356	save_state(Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
357	{	413	{
358	{	414	{
359	dSP;	415	dSP;
360	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
361	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
364	/*	420	/*
365	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
366	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
367	*/	423	*/
368		424
369	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
370	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
371	for (;;)	427	for (;;)
372	{	428	{
373	while (cxix >= 0)	429	while (cxix >= 0)
374	{	430	{
375	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
376		432
377	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
378	{	434	{
379	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
		436
380	if (CvDEPTH(cv))	437	if (CvDEPTH (cv))
381	{	438	{
382	EXTEND (SP, CvDEPTH(cv)*2);	439	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));	440	PUSHs ((SV *)CvPADLIST (cv));
		441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
392	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
393		443
		444	CvDEPTH (cv) = 0;
394	get_padlist (cv);	445	get_padlist (aTHX_ cv);
395	}	446	}
396	}	447	}
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	}	448	}
406		449
407	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
408	break;	451	break;
409		452
410	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
411	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
412	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
413	}	456	}
414		457
415	PUTBACK;	458	PUTBACK;
416	}	459	}
417		460
418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
420	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = PL_defoutgv;
		465	c->irssv = PL_rs;
		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 (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += 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 = newGVgen ("Coro");
		612	GvIOp(PL_defoutgv) = io;
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) \|= IOf_FLUSH;
		616	}
565		617
566	{	618	{
567	dSP;	619	dSP;
568	LOGOP myop;	620	LOGOP myop;
569		621
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);	622	Zero (&myop, 1, LOGOP);
577	myop.op_next = Nullop;	623	myop.op_next = Nullop;
578	myop.op_flags = OPf_WANT_VOID;	624	myop.op_flags = OPf_WANT_VOID;
579		625
		626	PUSHMARK (SP);
		627	XPUSHs (av_shift (GvAV (PL_defgv)));
		628	PUTBACK;
580	PL_op = (OP *)&myop;	629	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);	630	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
586	SPAGAIN;	631	SPAGAIN;
587
588	ENTER; /* necessary e.g. for dounwind */
589	}	632	}
590	}
591		633
		634	ENTER; /* necessary e.g. for dounwind */
		635	}
		636
592	static void	637	static void
		638	coro_destroy (pTHX_ struct coro *coro)
		639	{
		640	if (!IN_DESTRUCT)
		641	{
		642	/* restore all saved variables and stuff */
		643	LEAVE_SCOPE (0);
		644	assert (PL_tmps_floor == -1);
		645
		646	/* free all temporaries */
		647	FREETMPS;
		648	assert (PL_tmps_ix == -1);
		649
		650	/* unwind all extra stacks */
		651	POPSTACK_TO (PL_mainstack);
		652
		653	/* unwind main stack */
		654	dounwind (-1);
		655	}
		656
		657	SvREFCNT_dec (GvSV (PL_defgv));
		658	SvREFCNT_dec (GvAV (PL_defgv));
		659	SvREFCNT_dec (GvSV (PL_errgv));
		660	SvREFCNT_dec (PL_defoutgv);
		661	SvREFCNT_dec (PL_rs);
		662	SvREFCNT_dec (GvSV (irsgv));
		663
		664	coro_destroy_stacks (aTHX);
		665	}
		666
		667	static void
593	free_coro_mortal ()	668	free_coro_mortal (pTHX)
594	{	669	{
595	if (coro_mortal)	670	if (coro_mortal)
596	{	671	{
597	SvREFCNT_dec (coro_mortal);	672	SvREFCNT_dec (coro_mortal);
598	coro_mortal = 0;	673	coro_mortal = 0;
599	}	674	}
600	}	675	}
601		676
		677	static int
		678	runops_trace (pTHX)
		679	{
		680	COP *oldcop = 0;
		681	int oldcxix = -2;
		682	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		683	coro_cctx *cctx = coro->cctx;
		684
		685	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		686	{
		687	PERL_ASYNC_CHECK ();
		688
		689	if (cctx->flags & CC_TRACE_ALL)
		690	{
		691	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		692	{
		693	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		694	SV bot, top;
		695	AV av = newAV (); / return values */
		696	SV **cb;
		697	dSP;
		698
		699	GV *gv = CvGV (cx->blk_sub.cv);
		700	SV *fullname = sv_2mortal (newSV (0));
		701	if (isGV (gv))
		702	gv_efullname3 (fullname, gv, 0);
		703
		704	bot = PL_stack_base + cx->blk_oldsp + 1;
		705	top = cx->blk_gimme == G_ARRAY ? SP + 1
		706	: cx->blk_gimme == G_SCALAR ? bot + 1
		707	: bot;
		708
		709	while (bot < top)
		710	av_push (av, SvREFCNT_inc (*bot++));
		711
		712	PL_runops = RUNOPS_DEFAULT;
		713	ENTER;
		714	SAVETMPS;
		715	EXTEND (SP, 3);
		716	PUSHMARK (SP);
		717	PUSHs (&PL_sv_no);
		718	PUSHs (fullname);
		719	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		720	PUTBACK;
		721	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		722	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		723	SPAGAIN;
		724	FREETMPS;
		725	LEAVE;
		726	PL_runops = runops_trace;
		727	}
		728
		729	if (oldcop != PL_curcop)
		730	{
		731	oldcop = PL_curcop;
		732
		733	if (PL_curcop != &PL_compiling)
		734	{
		735	SV **cb;
		736
		737	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		738	{
		739	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		740
		741	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		742	{
		743	runops_proc_t old_runops = PL_runops;
		744	dSP;
		745	GV *gv = CvGV (cx->blk_sub.cv);
		746	SV *fullname = sv_2mortal (newSV (0));
		747
		748	if (isGV (gv))
		749	gv_efullname3 (fullname, gv, 0);
		750
		751	PL_runops = RUNOPS_DEFAULT;
		752	ENTER;
		753	SAVETMPS;
		754	EXTEND (SP, 3);
		755	PUSHMARK (SP);
		756	PUSHs (&PL_sv_yes);
		757	PUSHs (fullname);
		758	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		759	PUTBACK;
		760	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		761	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		762	SPAGAIN;
		763	FREETMPS;
		764	LEAVE;
		765	PL_runops = runops_trace;
		766	}
		767
		768	oldcxix = cxstack_ix;
		769	}
		770
		771	if (cctx->flags & CC_TRACE_LINE)
		772	{
		773	dSP;
		774
		775	PL_runops = RUNOPS_DEFAULT;
		776	ENTER;
		777	SAVETMPS;
		778	EXTEND (SP, 3);
		779	PL_runops = RUNOPS_DEFAULT;
		780	PUSHMARK (SP);
		781	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		782	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		783	PUTBACK;
		784	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		785	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		786	SPAGAIN;
		787	FREETMPS;
		788	LEAVE;
		789	PL_runops = runops_trace;
		790	}
		791	}
		792	}
		793	}
		794	}
		795
		796	TAINT_NOT;
		797	return 0;
		798	}
		799
		800	/* inject a fake call to Coro::State::_cctx_init into the execution */
		801	/* _cctx_init should be careful, as it could be called at almost any time */
		802	/* during execution of a perl program */
602	static void NOINLINE	803	static void NOINLINE
603	prepare_cctx (coro_cctx *cctx)	804	prepare_cctx (pTHX_ coro_cctx *cctx)
604	{	805	{
605	dSP;	806	dSP;
606	LOGOP myop;	807	LOGOP myop;
607		808
		809	PL_top_env = &PL_start_env;
		810
		811	if (cctx->flags & CC_TRACE)
		812	PL_runops = runops_trace;
		813
608	Zero (&myop, 1, LOGOP);	814	Zero (&myop, 1, LOGOP);
609	myop.op_next = PL_op;	815	myop.op_next = PL_op;
610	myop.op_flags = OPf_WANT_VOID;	816	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
611
612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613		817
614	PUSHMARK (SP);	818	PUSHMARK (SP);
		819	EXTEND (SP, 2);
		820	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	821	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
616	PUTBACK;	822	PUTBACK;
		823	PL_op = (OP *)&myop;
617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	824	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
618	SPAGAIN;	825	SPAGAIN;
619	}	826	}
620		827
		828	/*
		829	* this is a _very_ stripped down perl interpreter ;)
		830	*/
621	static void	831	static void
622	coro_run (void *arg)	832	coro_run (void *arg)
623	{	833	{
		834	dTHX;
		835
624	/* coro_run is the alternative epilogue of transfer() */	836	/* coro_run is the alternative tail of transfer(), so unlock here. */
625	UNLOCK;	837	UNLOCK;
626		838
		839	/* we now skip the entersub that lead to transfer() */
		840	PL_op = PL_op->op_next;
		841
		842	/* inject a fake subroutine call to cctx_init */
		843	prepare_cctx (aTHX_ (coro_cctx *)arg);
		844
		845	/* somebody or something will hit me for both perl_run and PL_restartop */
		846	PL_restartop = PL_op;
		847	perl_run (PL_curinterp);
		848
627	/*	849	/*
628	* this is a _very_ stripped down perl interpreter ;)	850	* If perl-run returns we assume exit() was being called or the coro
		851	* fell off the end, which seems to be the only valid (non-bug)
		852	* reason for perl_run to return. We try to exit by jumping to the
		853	* bootstrap-time "top" top_env, as we cannot restore the "main"
		854	* coroutine as Coro has no such concept
629	*/	855	*/
630	PL_top_env = &PL_start_env;	856	PL_top_env = main_top_env;
631	/* inject call to cctx_init */	857	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	}	858	}
640		859
641	static coro_cctx *	860	static coro_cctx *
642	cctx_new ()	861	cctx_new ()
643	{	862	{
644	coro_cctx *cctx;	863	coro_cctx *cctx;
		864	void *stack_start;
		865	size_t stack_size;
645		866
		867	++cctx_count;
		868
646	New (0, cctx, 1, coro_cctx);	869	Newz (0, cctx, 1, coro_cctx);
647		870
648	#if HAVE_MMAP	871	#if HAVE_MMAP
649		872
650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	873	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
651	/* mmap suppsedly does allocate-on-write for us */	874	/* 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);	875	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
653		876
654	if (cctx->sptr == (void *)-1)	877	if (cctx->sptr != (void *)-1)
655	{
656	perror ("FATAL: unable to mmap stack for coroutine");
657	_exit (EXIT_FAILURE);
658	}	878	{
659
660	# if STACKGUARD	879	# if CORO_STACKGUARD
661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	880	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
662	# endif	881	# endif
		882	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		883	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		884	cctx->flags \|= CC_MAPPED;
		885	}
		886	else
		887	#endif
		888	{
		889	cctx->ssize = coro_stacksize * (long)sizeof (long);
		890	New (0, cctx->sptr, coro_stacksize, long);
663		891
664	#else
665
666	cctx->ssize = STACKSIZE * (long)sizeof (long);
667	New (0, cctx->sptr, STACKSIZE, long);
668
669	if (!cctx->sptr)	892	if (!cctx->sptr)
670	{	893	{
671	perror ("FATAL: unable to malloc stack for coroutine");	894	perror ("FATAL: unable to allocate stack for coroutine");
672	_exit (EXIT_FAILURE);	895	_exit (EXIT_FAILURE);
673	}	896	}
674		897
675	#endif	898	stack_start = cctx->sptr;
		899	stack_size = cctx->ssize;
		900	}
676		901
677	#if USE_VALGRIND	902	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);	903	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
685		904
686	return cctx;	905	return cctx;
687	}	906	}
688		907
689	static void	908	static void
690	cctx_free (coro_cctx *cctx)	909	cctx_destroy (coro_cctx *cctx)
691	{	910	{
692	if (!cctx)	911	if (!cctx)
693	return;	912	return;
694		913
		914	--cctx_count;
		915
695	#if USE_VALGRIND	916	#if CORO_USE_VALGRIND
696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	917	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697	#endif	918	#endif
698		919
699	#if HAVE_MMAP	920	#if HAVE_MMAP
		921	if (cctx->flags & CC_MAPPED)
700	munmap (cctx->sptr, cctx->ssize);	922	munmap (cctx->sptr, cctx->ssize);
701	#else	923	else
		924	#endif
702	Safefree (cctx->sptr);	925	Safefree (cctx->sptr);
703	#endif
704		926
705	Safefree (cctx);	927	Safefree (cctx);
706	}	928	}
707		929
708	static coro_cctx *cctx_first;
709	static int cctx_count, cctx_idle;
710
711	static coro_cctx *	930	static coro_cctx *
712	cctx_get ()	931	cctx_get (pTHX)
713	{	932	{
714	coro_cctx *cctx;
715
716	if (cctx_first)	933	while (cctx_first)
717	{	934	{
		935	coro_cctx *cctx = cctx_first;
		936	cctx_first = cctx->next;
718	--cctx_idle;	937	--cctx_idle;
719	cctx = cctx_first;	938
720	cctx_first = cctx->next;	939	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
721	}	940	return cctx;
722	else	941
723	{	942	cctx_destroy (cctx);
724	++cctx_count;
725	cctx = cctx_new ();
726	PL_op = PL_op->op_next;
727	}	943	}
728		944
729	return cctx;	945	return cctx_new ();
730	}	946	}
731		947
732	static void	948	static void
733	cctx_put (coro_cctx *cctx)	949	cctx_put (coro_cctx *cctx)
734	{	950	{
		951	/* free another cctx if overlimit */
		952	if (cctx_idle >= MAX_IDLE_CCTX)
		953	{
		954	coro_cctx *first = cctx_first;
		955	cctx_first = first->next;
		956	--cctx_idle;
		957
		958	cctx_destroy (first);
		959	}
		960
735	++cctx_idle;	961	++cctx_idle;
736	cctx->next = cctx_first;	962	cctx->next = cctx_first;
737	cctx_first = cctx;	963	cctx_first = cctx;
738	}	964	}
739		965
740	/* never call directly, always through the coro_state_transfer global variable */	966	/ coroutine switching ***************************************************/
		967
741	static void NOINLINE	968	static void NOINLINE
		969	transfer_check (pTHX_ struct coro prev, struct coro next)
		970	{
		971	if (prev != next)
		972	{
		973	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		974	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		975
		976	if (next->flags & CF_RUNNING)
		977	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		978
		979	if (next->flags & CF_DESTROYED)
		980	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		981
		982	if (PL_lex_state != LEX_NOTPARSING)
		983	croak ("Coro::State::transfer called while parsing, but this is not supported");
		984	}
		985	}
		986
		987	/* always use the TRANSFER macro */
		988	static void NOINLINE
742	transfer (struct coro prev, struct coro next, int flags)	989	transfer (pTHX_ struct coro prev, struct coro next)
743	{	990	{
744	dSTACKLEVEL;	991	dSTACKLEVEL;
745		992
746	/* sometimes transfer is only called to set idle_sp */	993	/* sometimes transfer is only called to set idle_sp */
747	if (flags == TRANSFER_SET_STACKLEVEL)	994	if (!next)
		995	{
748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	996	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		997	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		998	}
749	else if (prev != next)	999	else if (prev != next)
750	{	1000	{
751	coro_cctx *prev__cctx;	1001	coro_cctx *prev__cctx;
752		1002
		1003	if (prev->flags & CF_NEW)
		1004	{
		1005	/* create a new empty context */
		1006	Newz (0, prev->cctx, 1, coro_cctx);
		1007	prev->flags &= ~CF_NEW;
		1008	prev->flags \|= CF_RUNNING;
		1009	}
		1010
		1011	prev->flags &= ~CF_RUNNING;
		1012	next->flags \|= CF_RUNNING;
		1013
753	LOCK;	1014	LOCK;
754		1015
755	if (next->mainstack)	1016	if (next->flags & CF_NEW)
756	{	1017	{
757	/* coroutine already started */	1018	/* need to start coroutine */
758	SAVE (prev, flags);	1019	next->flags &= ~CF_NEW;
759	LOAD (next);	1020	/* first get rid of the old state */
		1021	save_perl (aTHX_ prev);
		1022	/* setup coroutine call */
		1023	coro_setup (aTHX_ next);
760	}	1024	}
761	else	1025	else
762	{	1026	{
763	/* need to start coroutine */	1027	/* coroutine already started */
764	/* first get rid of the old state */	1028	save_perl (aTHX_ prev);
765	SAVE (prev, -1);	1029	load_perl (aTHX_ next);
766	/* setup coroutine call */
767	setup_coro (next);
768	/* need a stack */
769	next->cctx = 0;
770	}	1030	}
771		1031
772	if (!prev->cctx)
773	/* create a new empty context */
774	Newz (0, prev->cctx, 1, coro_cctx);
775
776	prev__cctx = prev->cctx;	1032	prev__cctx = prev->cctx;
777		1033
778	/* possibly "free" the cctx */	1034	/* possibly "free" the cctx */
779	if (prev__cctx->idle_sp == STACKLEVEL)	1035	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
780	{	1036	{
		1037	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1038	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1039
		1040	prev->cctx = 0;
		1041
781	cctx_put (prev__cctx);	1042	cctx_put (prev__cctx);
782	prev->cctx = 0;
783	}	1043	}
784		1044
		1045	++next->usecount;
		1046
785	if (!next->cctx)	1047	if (!next->cctx)
786	next->cctx = cctx_get ();	1048	next->cctx = cctx_get (aTHX);
787		1049
788	if (prev__cctx != next->cctx)	1050	if (prev__cctx != next->cctx)
789	{	1051	{
790	prev__cctx->top_env = PL_top_env;	1052	prev__cctx->top_env = PL_top_env;
791	PL_top_env = next->cctx->top_env;	1053	PL_top_env = next->cctx->top_env;
792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1054	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793	}	1055	}
794		1056
795	free_coro_mortal ();	1057	free_coro_mortal (aTHX);
796
797	UNLOCK;	1058	UNLOCK;
798	}	1059	}
799	}	1060	}
800		1061
801	struct transfer_args	1062	struct transfer_args
802	{	1063	{
803	struct coro prev, next;	1064	struct coro prev, next;
804	int flags;
805	};	1065	};
806		1066
807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1067	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1068	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
808		1069
		1070	/ high level stuff ******************************************************/
		1071
809	static void	1072	static int
810	coro_state_destroy (struct coro *coro)	1073	coro_state_destroy (pTHX_ struct coro *coro)
811	{	1074	{
812	if (coro->refcnt--)	1075	if (coro->flags & CF_DESTROYED)
813	return;	1076	return 0;
		1077
		1078	coro->flags \|= CF_DESTROYED;
		1079
		1080	if (coro->flags & CF_READY)
		1081	{
		1082	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1083	/* alternative: look through all ready queues and remove the coro */
		1084	LOCK;
		1085	--coro_nready;
		1086	UNLOCK;
		1087	}
		1088	else
		1089	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
814		1090
815	if (coro->mainstack && coro->mainstack != main_mainstack)	1091	if (coro->mainstack && coro->mainstack != main_mainstack)
816	{	1092	{
817	struct coro temp;	1093	struct coro temp;
818		1094
819	SAVE ((&temp), TRANSFER_SAVE_ALL);	1095	if (coro->flags & CF_RUNNING)
820	LOAD (coro);	1096	croak ("FATAL: tried to destroy currently running coroutine");
821		1097
822	coro_destroy_stacks ();	1098	save_perl (aTHX_ &temp);
		1099	load_perl (aTHX_ coro);
823		1100
		1101	coro_destroy (aTHX_ coro);
		1102
824	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1103	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
825		1104
826	coro->mainstack = 0;	1105	coro->mainstack = 0;
827	}	1106	}
828		1107
829	cctx_free (coro->cctx);	1108	cctx_destroy (coro->cctx);
830	SvREFCNT_dec (coro->args);	1109	SvREFCNT_dec (coro->args);
831	Safefree (coro);	1110
		1111	if (coro->next) coro->next->prev = coro->prev;
		1112	if (coro->prev) coro->prev->next = coro->next;
		1113	if (coro == coro_first) coro_first = coro->next;
		1114
		1115	return 1;
832	}	1116	}
833		1117
834	static int	1118	static int
835	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1119	coro_state_free (pTHX_ SV sv, MAGIC mg)
836	{	1120	{
837	struct coro coro = (struct coro )mg->mg_ptr;	1121	struct coro coro = (struct coro )mg->mg_ptr;
838	mg->mg_ptr = 0;	1122	mg->mg_ptr = 0;
839		1123
		1124	coro->hv = 0;
		1125
		1126	if (--coro->refcnt < 0)
		1127	{
840	coro_state_destroy (coro);	1128	coro_state_destroy (aTHX_ coro);
		1129	Safefree (coro);
		1130	}
841		1131
842	return 0;	1132	return 0;
843	}	1133	}
844		1134
845	static int	1135	static int
…		…
852	return 0;	1142	return 0;
853	}	1143	}
854		1144
855	static MGVTBL coro_state_vtbl = {	1145	static MGVTBL coro_state_vtbl = {
856	0, 0, 0, 0,	1146	0, 0, 0, 0,
857	coro_state_clear,	1147	coro_state_free,
858	0,	1148	0,
859	#ifdef MGf_DUP	1149	#ifdef MGf_DUP
860	coro_state_dup,	1150	coro_state_dup,
861	#else	1151	#else
862	# define MGf_DUP 0	1152	# define MGf_DUP 0
863	#endif	1153	#endif
864	};	1154	};
865		1155
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	1156	static void
889	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1157	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
890	{	1158	{
891	ta->prev = SvSTATE (prev);	1159	ta->prev = SvSTATE (prev_sv);
892	ta->next = SvSTATE (next);	1160	ta->next = SvSTATE (next_sv);
893	ta->flags = flags;	1161	TRANSFER_CHECK (*ta);
894	}	1162	}
895		1163
896	static void	1164	static void
897	api_transfer (SV prev, SV next, int flags)	1165	api_transfer (SV prev_sv, SV next_sv)
898	{	1166	{
899	dTHX;	1167	dTHX;
900	struct transfer_args ta;	1168	struct transfer_args ta;
901		1169
902	prepare_transfer (&ta, prev, next, flags);	1170	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
903	TRANSFER (ta);	1171	TRANSFER (ta);
904	}	1172	}
905		1173
906	/ Coro ******************************************************************/	1174	/ Coro ******************************************************************/
907		1175
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	1176	static void
921	coro_enq (SV *sv)	1177	coro_enq (pTHX_ SV *coro_sv)
922	{	1178	{
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);	1179	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
931	coro_nready++;
932	}	1180	}
933		1181
934	static SV *	1182	static SV *
935	coro_deq (int min_prio)	1183	coro_deq (pTHX_ int min_prio)
936	{	1184	{
937	int prio = PRIO_MAX - PRIO_MIN;	1185	int prio = PRIO_MAX - PRIO_MIN;
938		1186
939	min_prio -= PRIO_MIN;	1187	min_prio -= PRIO_MIN;
940	if (min_prio < 0)	1188	if (min_prio < 0)
941	min_prio = 0;	1189	min_prio = 0;
942		1190
943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1191	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
944	if (AvFILLp (coro_ready [prio]) >= 0)	1192	if (AvFILLp (coro_ready [prio]) >= 0)
945	{
946	coro_nready--;
947	return av_shift (coro_ready [prio]);	1193	return av_shift (coro_ready [prio]);
948	}
949		1194
950	return 0;	1195	return 0;
951	}	1196	}
952		1197
953	static void	1198	static int
954	api_ready (SV *coro)	1199	api_ready (SV *coro_sv)
955	{	1200	{
956	dTHX;	1201	dTHX;
		1202	struct coro *coro;
957		1203
958	if (SvROK (coro))	1204	if (SvROK (coro_sv))
959	coro = SvRV (coro);	1205	coro_sv = SvRV (coro_sv);
		1206
		1207	coro = SvSTATE (coro_sv);
		1208
		1209	if (coro->flags & CF_READY)
		1210	return 0;
		1211
		1212	coro->flags \|= CF_READY;
960		1213
961	LOCK;	1214	LOCK;
962	coro_enq (SvREFCNT_inc (coro));	1215	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1216	++coro_nready;
963	UNLOCK;	1217	UNLOCK;
964	}
965		1218
		1219	return 1;
		1220	}
		1221
966	static void	1222	static int
		1223	api_is_ready (SV *coro_sv)
		1224	{
		1225	dTHX;
		1226	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1227	}
		1228
		1229	static void
967	prepare_schedule (struct transfer_args *ta)	1230	prepare_schedule (pTHX_ struct transfer_args *ta)
968	{	1231	{
969	SV current, prev, *next;	1232	SV prev_sv, next_sv;
970
971	current = GvSV (coro_current);
972		1233
973	for (;;)	1234	for (;;)
974	{	1235	{
975	LOCK;	1236	LOCK;
976	next = coro_deq (PRIO_MIN);	1237	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1238
		1239	/* nothing to schedule: call the idle handler */
		1240	if (!next_sv)
		1241	{
		1242	dSP;
		1243	UNLOCK;
		1244
		1245	ENTER;
		1246	SAVETMPS;
		1247
		1248	PUSHMARK (SP);
		1249	PUTBACK;
		1250	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1251
		1252	FREETMPS;
		1253	LEAVE;
		1254	continue;
		1255	}
		1256
		1257	ta->next = SvSTATE (next_sv);
		1258
		1259	/* cannot transfer to destroyed coros, skip and look for next */
		1260	if (ta->next->flags & CF_DESTROYED)
		1261	{
		1262	UNLOCK;
		1263	SvREFCNT_dec (next_sv);
		1264	/* coro_nready is already taken care of by destroy */
		1265	continue;
		1266	}
		1267
		1268	--coro_nready;
977	UNLOCK;	1269	UNLOCK;
978
979	if (next)
980	break;	1270	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	}	1271	}
995	}
996
997	prev = SvRV (current);
998	SvRV (current) = next;
999		1272
1000	/* free this only after the transfer */	1273	/* free this only after the transfer */
		1274	prev_sv = SvRV (coro_current);
		1275	ta->prev = SvSTATE (prev_sv);
		1276	TRANSFER_CHECK (*ta);
		1277	assert (ta->next->flags & CF_READY);
		1278	ta->next->flags &= ~CF_READY;
		1279	SvRV_set (coro_current, next_sv);
		1280
1001	LOCK;	1281	LOCK;
1002	free_coro_mortal ();	1282	free_coro_mortal (aTHX);
		1283	coro_mortal = prev_sv;
1003	UNLOCK;	1284	UNLOCK;
1004	coro_mortal = prev;
1005
1006	ta->prev = SvSTATE (prev);
1007	ta->next = SvSTATE (next);
1008	ta->flags = TRANSFER_SAVE_ALL;
1009	}	1285	}
1010		1286
1011	static void	1287	static void
1012	prepare_cede (struct transfer_args *ta)	1288	prepare_cede (pTHX_ struct transfer_args *ta)
1013	{	1289	{
1014	LOCK;	1290	api_ready (coro_current);
1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016	UNLOCK;
1017
1018	prepare_schedule (ta);	1291	prepare_schedule (aTHX_ ta);
		1292	}
		1293
		1294	static int
		1295	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1296	{
		1297	if (coro_nready)
		1298	{
		1299	SV *prev = SvRV (coro_current);
		1300	prepare_schedule (aTHX_ ta);
		1301	api_ready (prev);
		1302	return 1;
		1303	}
		1304	else
		1305	return 0;
1019	}	1306	}
1020		1307
1021	static void	1308	static void
1022	api_schedule (void)	1309	api_schedule (void)
1023	{	1310	{
1024	dTHX;	1311	dTHX;
1025	struct transfer_args ta;	1312	struct transfer_args ta;
1026		1313
1027	prepare_schedule (&ta);	1314	prepare_schedule (aTHX_ &ta);
1028	TRANSFER (ta);	1315	TRANSFER (ta);
1029	}	1316	}
1030		1317
1031	static void	1318	static int
1032	api_cede (void)	1319	api_cede (void)
1033	{	1320	{
1034	dTHX;	1321	dTHX;
1035	struct transfer_args ta;	1322	struct transfer_args ta;
1036		1323
1037	prepare_cede (&ta);	1324	prepare_cede (aTHX_ &ta);
		1325
		1326	if (ta.prev != ta.next)
		1327	{
1038	TRANSFER (ta);	1328	TRANSFER (ta);
		1329	return 1;
		1330	}
		1331	else
		1332	return 0;
1039	}	1333	}
1040		1334
		1335	static int
		1336	api_cede_notself (void)
		1337	{
		1338	dTHX;
		1339	struct transfer_args ta;
		1340
		1341	if (prepare_cede_notself (aTHX_ &ta))
		1342	{
		1343	TRANSFER (ta);
		1344	return 1;
		1345	}
		1346	else
		1347	return 0;
		1348	}
		1349
		1350	static void
		1351	api_trace (SV *coro_sv, int flags)
		1352	{
		1353	dTHX;
		1354	struct coro *coro = SvSTATE (coro_sv);
		1355
		1356	if (flags & CC_TRACE)
		1357	{
		1358	if (!coro->cctx)
		1359	coro->cctx = cctx_new ();
		1360	else if (!(coro->cctx->flags & CC_TRACE))
		1361	croak ("cannot enable tracing on coroutine with custom stack");
		1362
		1363	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1364	}
		1365	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1366	{
		1367	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1368
		1369	if (coro->flags & CF_RUNNING)
		1370	PL_runops = RUNOPS_DEFAULT;
		1371	else
		1372	coro->runops = RUNOPS_DEFAULT;
		1373	}
		1374	}
		1375
1041	MODULE = Coro::State PACKAGE = Coro::State	1376	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1042		1377
1043	PROTOTYPES: DISABLE	1378	PROTOTYPES: DISABLE
1044		1379
1045	BOOT:	1380	BOOT:
1046	{	1381	{
1047	#ifdef USE_ITHREADS	1382	#ifdef USE_ITHREADS
1048	MUTEX_INIT (&coro_mutex);	1383	MUTEX_INIT (&coro_mutex);
1049	#endif	1384	#endif
1050	BOOT_PAGESIZE;	1385	BOOT_PAGESIZE;
1051		1386
		1387	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1388
1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1389	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1053		1390
1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1394	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1057		1395
1058	main_mainstack = PL_mainstack;	1396	main_mainstack = PL_mainstack;
		1397	main_top_env = PL_top_env;
		1398
		1399	while (main_top_env->je_prev)
		1400	main_top_env = main_top_env->je_prev;
1059		1401
1060	coroapi.ver = CORO_API_VERSION;	1402	coroapi.ver = CORO_API_VERSION;
1061	coroapi.transfer = api_transfer;	1403	coroapi.transfer = api_transfer;
1062		1404
1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1405	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1070	struct coro *coro;	1412	struct coro *coro;
1071	HV *hv;	1413	HV *hv;
1072	int i;	1414	int i;
1073		1415
1074	Newz (0, coro, 1, struct coro);	1416	Newz (0, coro, 1, struct coro);
1075	coro->args = newAV ();	1417	coro->args = newAV ();
		1418	coro->flags = CF_NEW;
1076		1419
		1420	if (coro_first) coro_first->prev = coro;
		1421	coro->next = coro_first;
		1422	coro_first = coro;
		1423
1077	hv = newHV ();	1424	coro->hv = hv = newHV ();
1078	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1425	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));	1426	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1080		1427
1081	for (i = 1; i < items; i++)	1428	for (i = 1; i < items; i++)
1082	av_push (coro->args, newSVsv (ST (i)));	1429	av_push (coro->args, newSVsv (ST (i)));
1083	}	1430	}
1084	OUTPUT:	1431	OUTPUT:
1085	RETVAL	1432	RETVAL
1086		1433
		1434	# these not obviously related functions are all rolled into the same xs
		1435	# function to increase chances that they all will call transfer with the same
		1436	# stack offset
1087	void	1437	void
1088	_set_stacklevel (...)	1438	_set_stacklevel (...)
1089	ALIAS:	1439	ALIAS:
1090	Coro::State::transfer = 1	1440	Coro::State::transfer = 1
1091	Coro::schedule = 2	1441	Coro::schedule = 2
1092	Coro::cede = 3	1442	Coro::cede = 3
1093	Coro::Cont::yield = 4	1443	Coro::cede_notself = 4
1094	CODE:	1444	CODE:
1095	{	1445	{
1096	struct transfer_args ta;	1446	struct transfer_args ta;
1097		1447
1098	switch (ix)	1448	switch (ix)
1099	{	1449	{
1100	case 0:	1450	case 0:
1101	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1451	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1102	ta.next = 0;	1452	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1453	break;
1105		1454
1106	case 1:	1455	case 1:
1107	if (items != 3)	1456	if (items != 2)
1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1457	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109		1458
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1459	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111	break;	1460	break;
1112		1461
1113	case 2:	1462	case 2:
1114	prepare_schedule (&ta);	1463	prepare_schedule (aTHX_ &ta);
1115	break;	1464	break;
1116		1465
1117	case 3:	1466	case 3:
1118	prepare_cede (&ta);	1467	prepare_cede (aTHX_ &ta);
1119	break;	1468	break;
1120		1469
1121	case 4:	1470	case 4:
1122	{	1471	if (!prepare_cede_notself (aTHX_ &ta))
1123	SV *yieldstack;	1472	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1473
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;	1474	break;
1146
1147	}	1475	}
1148		1476
		1477	BARRIER;
1149	TRANSFER (ta);	1478	TRANSFER (ta);
1150	}
1151		1479
1152	void	1480	if (GIMME_V != G_VOID && ta.next != ta.prev)
1153	_clone_state_from (SV dst, SV src)	1481	XSRETURN_YES;
		1482	}
		1483
		1484	bool
		1485	_destroy (SV *coro_sv)
1154	CODE:	1486	CODE:
1155	{	1487	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1488	OUTPUT:
1157		1489	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		1490
1164	void	1491	void
1165	_exit (code)	1492	_exit (code)
1166	int code	1493	int code
1167	PROTOTYPE: $	1494	PROTOTYPE: $
1168	CODE:	1495	CODE:
1169	_exit (code);	1496	_exit (code);
1170		1497
1171	int	1498	int
		1499	cctx_stacksize (int new_stacksize = 0)
		1500	CODE:
		1501	RETVAL = coro_stacksize;
		1502	if (new_stacksize)
		1503	coro_stacksize = new_stacksize;
		1504	OUTPUT:
		1505	RETVAL
		1506
		1507	int
1172	cctx_count ()	1508	cctx_count ()
1173	CODE:	1509	CODE:
1174	RETVAL = cctx_count;	1510	RETVAL = cctx_count;
1175	OUTPUT:	1511	OUTPUT:
1176	RETVAL	1512	RETVAL
…		…
1180	CODE:	1516	CODE:
1181	RETVAL = cctx_idle;	1517	RETVAL = cctx_idle;
1182	OUTPUT:	1518	OUTPUT:
1183	RETVAL	1519	RETVAL
1184		1520
		1521	void
		1522	list ()
		1523	PPCODE:
		1524	{
		1525	struct coro *coro;
		1526	for (coro = coro_first; coro; coro = coro->next)
		1527	if (coro->hv)
		1528	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1529	}
		1530
		1531	void
		1532	call (Coro::State coro, SV *coderef)
		1533	ALIAS:
		1534	eval = 1
		1535	CODE:
		1536	{
		1537	if (coro->mainstack)
		1538	{
		1539	struct coro temp;
		1540	Zero (&temp, 1, struct coro);
		1541
		1542	if (!(coro->flags & CF_RUNNING))
		1543	{
		1544	save_perl (aTHX_ &temp);
		1545	load_perl (aTHX_ coro);
		1546	}
		1547
		1548	{
		1549	dSP;
		1550	ENTER;
		1551	SAVETMPS;
		1552	PUSHMARK (SP);
		1553	PUTBACK;
		1554	if (ix)
		1555	eval_sv (coderef, 0);
		1556	else
		1557	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1558	SPAGAIN;
		1559	FREETMPS;
		1560	LEAVE;
		1561	PUTBACK;
		1562	}
		1563
		1564	if (!(coro->flags & CF_RUNNING))
		1565	{
		1566	save_perl (aTHX_ coro);
		1567	load_perl (aTHX_ &temp);
		1568	}
		1569	}
		1570	}
		1571
		1572	SV *
		1573	is_ready (Coro::State coro)
		1574	PROTOTYPE: $
		1575	ALIAS:
		1576	is_ready = CF_READY
		1577	is_running = CF_RUNNING
		1578	is_new = CF_NEW
		1579	is_destroyed = CF_DESTROYED
		1580	CODE:
		1581	RETVAL = boolSV (coro->flags & ix);
		1582	OUTPUT:
		1583	RETVAL
		1584
		1585	void
		1586	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1587
		1588	SV *
		1589	has_stack (Coro::State coro)
		1590	PROTOTYPE: $
		1591	CODE:
		1592	RETVAL = boolSV (!!coro->cctx);
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	int
		1597	is_traced (Coro::State coro)
		1598	PROTOTYPE: $
		1599	CODE:
		1600	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1601	OUTPUT:
		1602	RETVAL
		1603
		1604	IV
		1605	rss (Coro::State coro)
		1606	PROTOTYPE: $
		1607	ALIAS:
		1608	usecount = 1
		1609	CODE:
		1610	switch (ix)
		1611	{
		1612	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1613	case 1: RETVAL = coro->usecount; break;
		1614	}
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618
1185	MODULE = Coro::State PACKAGE = Coro	1619	MODULE = Coro::State PACKAGE = Coro
1186		1620
1187	BOOT:	1621	BOOT:
1188	{	1622	{
1189	int i;	1623	int i;
		1624
		1625	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1626	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1627	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1628
		1629	coro_current = get_sv ("Coro::current", FALSE);
		1630	SvREADONLY_on (coro_current);
1190		1631
1191	coro_stash = gv_stashpv ("Coro", TRUE);	1632	coro_stash = gv_stashpv ("Coro", TRUE);
1192		1633
1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1634	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1635	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1636	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1637	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1638	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1639	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1199		1640
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--; )	1641	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1204	coro_ready[i] = newAV ();	1642	coro_ready[i] = newAV ();
1205		1643
1206	{	1644	{
1207	SV *sv = perl_get_sv("Coro::API", 1);	1645	SV *sv = perl_get_sv("Coro::API", 1);
1208		1646
1209	coroapi.schedule = api_schedule;	1647	coroapi.schedule = api_schedule;
1210	coroapi.cede = api_cede;	1648	coroapi.cede = api_cede;
		1649	coroapi.cede_notself = api_cede_notself;
1211	coroapi.ready = api_ready;	1650	coroapi.ready = api_ready;
		1651	coroapi.is_ready = api_is_ready;
1212	coroapi.nready = &coro_nready;	1652	coroapi.nready = &coro_nready;
1213	coroapi.current = coro_current;	1653	coroapi.current = coro_current;
1214		1654
1215	GCoroAPI = &coroapi;	1655	GCoroAPI = &coroapi;
1216	sv_setiv (sv, (IV)&coroapi);	1656	sv_setiv (sv, (IV)&coroapi);
1217	SvREADONLY_on (sv);	1657	SvREADONLY_on (sv);
1218	}	1658	}
1219	}	1659	}
		1660
		1661	void
		1662	_set_current (SV *current)
		1663	PROTOTYPE: $
		1664	CODE:
		1665	SvREFCNT_dec (SvRV (coro_current));
		1666	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1220		1667
1221	int	1668	int
1222	prio (Coro::State coro, int newprio = 0)	1669	prio (Coro::State coro, int newprio = 0)
1223	ALIAS:	1670	ALIAS:
1224	nice = 1	1671	nice = 1
…		…
1227	RETVAL = coro->prio;	1674	RETVAL = coro->prio;
1228		1675
1229	if (items > 1)	1676	if (items > 1)
1230	{	1677	{
1231	if (ix)	1678	if (ix)
1232	newprio += coro->prio;	1679	newprio = coro->prio - newprio;
1233		1680
1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1681	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1682	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1236		1683
1237	coro->prio = newprio;	1684	coro->prio = newprio;
1238	}	1685	}
1239	}	1686	}
		1687	OUTPUT:
		1688	RETVAL
1240		1689
1241	void	1690	SV *
1242	ready (SV *self)	1691	ready (SV *self)
1243	PROTOTYPE: $	1692	PROTOTYPE: $
1244	CODE:	1693	CODE:
1245	api_ready (self);	1694	RETVAL = boolSV (api_ready (self));
		1695	OUTPUT:
		1696	RETVAL
1246		1697
1247	int	1698	int
1248	nready (...)	1699	nready (...)
1249	PROTOTYPE:	1700	PROTOTYPE:
1250	CODE:	1701	CODE:
1251	RETVAL = coro_nready;	1702	RETVAL = coro_nready;
1252	OUTPUT:	1703	OUTPUT:
1253	RETVAL	1704	RETVAL
1254		1705
		1706	# for async_pool speedup
		1707	void
		1708	_pool_1 (SV *cb)
		1709	CODE:
		1710	{
		1711	int i, len;
		1712	HV hv = (HV )SvRV (coro_current);
		1713	AV *defav = GvAV (PL_defgv);
		1714	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1715	AV *invoke_av;
		1716
		1717	if (!invoke)
		1718	croak ("\3terminate\2\n");
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
		1730	av_fill (defav, len - 1);
		1731	for (i = 0; i < len; ++i)
		1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
		1734
		1735	SvREFCNT_dec (invoke);
		1736	}
		1737
		1738	void
		1739	_pool_2 (SV *cb)
		1740	CODE:
		1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
		1743
		1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1747	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1748	croak ("\3terminate\2\n");
		1749
		1750	av_clear (GvAV (PL_defgv));
		1751	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1752	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1753
		1754	coro->prio = 0;
		1755
		1756	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1757	api_trace (coro_current, 0);
		1758
		1759	av_push (av_async_pool, newSVsv (coro_current));
		1760	}
		1761
		1762
1255	MODULE = Coro::State PACKAGE = Coro::AIO	1763	MODULE = Coro::State PACKAGE = Coro::AIO
1256		1764
1257	SV *	1765	SV *
1258	_get_state ()	1766	_get_state ()
1259	CODE:	1767	CODE:
1260	{	1768	{
1261	struct {	1769	struct io_state *data;
1262	int errorno;
1263	int laststype;
1264	int laststatval;
1265	Stat_t statcache;
1266	} data;
1267		1770
		1771	RETVAL = newSV (sizeof (struct io_state));
		1772	data = (struct io_state *)SvPVX (RETVAL);
		1773	SvCUR_set (RETVAL, sizeof (struct io_state));
		1774	SvPOK_only (RETVAL);
		1775
1268	data.errorno = errno;	1776	data->errorno = errno;
1269	data.laststype = PL_laststype;	1777	data->laststype = PL_laststype;
1270	data.laststatval = PL_laststatval;	1778	data->laststatval = PL_laststatval;
1271	data.statcache = PL_statcache;	1779	data->statcache = PL_statcache;
1272
1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
1274	}	1780	}
1275	OUTPUT:	1781	OUTPUT:
1276	RETVAL	1782	RETVAL
1277		1783
1278	void	1784	void
1279	_set_state (char *data_)	1785	_set_state (char *data_)
1280	PROTOTYPE: $	1786	PROTOTYPE: $
1281	CODE:	1787	CODE:
1282	{	1788	{
1283	struct {	1789	struct io_state data = (void )data_;
1284	int errorno;
1285	int laststype;
1286	int laststatval;
1287	Stat_t statcache;
1288	} data = (void )data_;
1289		1790
1290	errno = data->errorno;	1791	errno = data->errorno;
1291	PL_laststype = data->laststype;	1792	PL_laststype = data->laststype;
1292	PL_laststatval = data->laststatval;	1793	PL_laststatval = data->laststatval;
1293	PL_statcache = data->statcache;	1794	PL_statcache = data->statcache;
1294	}	1795	}
		1796

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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 1.180 by root, Wed Oct 3 17:12:20 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC