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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs.
Revision 1.193 by root, Fri Oct 5 23:38:40 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"
		10
		11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
8		47
9	#define PERL_VERSION_ATLEAST(a,b,c) \	48	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	49	(PERL_REVISION > (a) \
11	\|\| (PERL_REVISION == (a) \	50	\|\| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	51	&& (PERL_VERSION > (b) \
13	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))	52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14		53
15	#if !PERL_VERSION_ATLEAST (5,8,0)	54	#if !PERL_VERSION_ATLEAST (5,6,0)
16	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
17	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
18	# endif	57	# endif
19	# ifndef call_sv	58	# ifndef call_sv
20	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
31	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
33	# endif	72	# endif
34	#endif	73	#endif
35		74
36	#include <stdio.h>	75	/* 5.8.7 */
37	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
38		87
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	89	# undef CORO_STACKGUARD
41	#endif
42
43	#ifndef STACKGUARD
44	# define STACKGUARD 0
45	#endif
46
47	#ifdef HAVE_MMAP
48	# include <unistd.h>
49	# include <sys/mman.h>
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif	90	#endif
57	# include <limits.h>	91
58	# ifndef PAGESIZE	92	#ifndef CORO_STACKGUARD
59	# define PAGESIZE pagesize	93	# define CORO_STACKGUARD 0
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif	94	#endif
65	#endif
66		95
67	/* The next macro should declare a variable stacklevel that contains and approximation	96	/* prefer perl internal functions over our own? */
68	* to the current C stack pointer. Its property is that it changes with each call	97	#ifndef CORO_PREFER_PERL_FUNCTIONS
69	* and should be unique. */	98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
70	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
71	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
72		105
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		107
75	#if __GNUC__ >= 3	108	#if __GNUC__ >= 3
76	# define attribute(x) __attribute__(x)	109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
77	#else	111	#else
78	# define attribute(x)	112	# define attribute(x)
		113	# define BARRIER
79	#endif	114	#endif
80		115
81	#define NOINLINE attribute ((noinline))	116	#define NOINLINE attribute ((noinline))
82		117
83	#include "CoroAPI.h"	118	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		119
87	#ifdef USE_ITHREADS	120	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	121	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	122	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	123	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	124	#else
92	# define LOCK (void)0	125	# define LOCK (void)0
93	# define UNLOCK (void)0	126	# define UNLOCK (void)0
94	#endif	127	#endif
95		128
		129	/* helper storage struct for Coro::AIO */
		130	struct io_state
		131	{
		132	int errorno;
		133	I32 laststype;
		134	int laststatval;
		135	Stat_t statcache;
		136	};
		137
		138	static size_t coro_stacksize = CORO_STACKSIZE;
96	static struct CoroAPI coroapi;	139	static struct CoroAPI coroapi;
97	static AV main_mainstack; / used to differentiate between $main and others */	140	static AV main_mainstack; / used to differentiate between $main and others */
		141	static JMPENV *main_top_env;
98	static HV coro_state_stash, coro_stash;	142	static HV coro_state_stash, coro_stash;
99	static SV coro_mortal; / will be freed after next transfer */	143	static SV coro_mortal; / will be freed after next transfer */
100		144
		145	static GV irsgv; / $/ */
		146	static GV stdoutgv; / STDOUT /
		147
		148	/* async_pool helper stuff */
		149	static SV *sv_pool_rss;
		150	static SV *sv_pool_size;
		151	static AV *av_async_pool;
		152
		153	static struct coro_cctx *cctx_first;
		154	static int cctx_count, cctx_idle;
		155
		156	enum {
		157	CC_MAPPED = 0x01,
		158	CC_NOREUSE = 0x02, /* throw this away after tracing */
		159	CC_TRACE = 0x04,
		160	CC_TRACE_SUB = 0x08, /* trace sub calls */
		161	CC_TRACE_LINE = 0x10, /* trace each statement */
		162	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		163	};
		164
101	/* this is a structure representing a c-level coroutine */	165	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	166	typedef struct coro_cctx {
103	struct coro_stack *next;	167	struct coro_cctx *next;
104		168
105	/* the stack */	169	/* the stack */
106	void *sptr;	170	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	171	size_t ssize;
108		172
109	/* cpu state */	173	/* cpu state */
110	void idle_sp; / sp of top-level transfer/schedule/cede call */	174	void idle_sp; / sp of top-level transfer/schedule/cede call */
		175	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
111	JMPENV *top_env;	176	JMPENV *top_env;
112	coro_context cctx;	177	coro_context cctx;
113	} coro_stack;	178
		179	#if CORO_USE_VALGRIND
		180	int valgrind_id;
		181	#endif
		182	unsigned char flags;
		183	} coro_cctx;
		184
		185	enum {
		186	CF_RUNNING = 0x0001, /* coroutine is running */
		187	CF_READY = 0x0002, /* coroutine is ready */
		188	CF_NEW = 0x0004, /* has never been switched to */
		189	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		190	};
114		191
115	/* this is a structure representing a perl-level coroutine */	192	/* this is a structure representing a perl-level coroutine */
116	struct coro {	193	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	194	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	195	coro_cctx *cctx;
119		196
120	/* data associated with this coroutine (initial args) */	197	/* data associated with this coroutine (initial args) */
121	AV *args;	198	AV *args;
122	int refcnt;	199	int refcnt;
		200	int flags; /* CF_ flags */
123		201
124	/* optionally saved, might be zero */	202	/* optionally saved, might be zero */
125	AV *defav;	203	AV defav; / @_ */
126	SV *defsv;	204	SV defsv; / $_ */
127	SV *errsv;	205	SV errsv; / $@ */
		206	SV deffh; / default filehandle */
		207	SV irssv; / $/ */
		208	SV irssv_sv; / real $/ cache */
128		209
129	/* saved global state not related to stacks */	210	#define VAR(name,type) type name;
130	U8 dowarn;	211	# include "state.h"
131	I32 in_eval;	212	#undef VAR
132		213
133	/* the stacks and related info (callchain etc..) */	214	/* statistics */
134	PERL_SI *curstackinfo;	215	int usecount; /* number of transfers to this coro */
135	AV *curstack;
136	AV *mainstack;
137	SV **stack_sp;
138	OP *op;
139	SV **curpad;
140	AV *comppad;
141	CV *compcv;
142	SV **stack_base;
143	SV **stack_max;
144	SV **tmps_stack;
145	I32 tmps_floor;
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		216
163	/* coro process data */	217	/* coro process data */
164	int prio;	218	int prio;
		219	//SV *throw;
		220
		221	/* async_pool */
		222	SV *saved_deffh;
		223
		224	/* linked list */
		225	struct coro next, prev;
		226	HV hv; / the perl hash associated with this coro, if any */
165	};	227	};
166		228
167	typedef struct coro *Coro__State;	229	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	230	typedef struct coro *Coro__State_or_hashref;
169		231
		232	/ Coro ******************************************************************/
		233
		234	#define PRIO_MAX 3
		235	#define PRIO_HIGH 1
		236	#define PRIO_NORMAL 0
		237	#define PRIO_LOW -1
		238	#define PRIO_IDLE -3
		239	#define PRIO_MIN -4
		240
		241	/* for Coro.pm */
		242	static SV *coro_current;
		243	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		244	static int coro_nready;
		245	static struct coro *coro_first;
		246
		247	/ lowlevel stuff ********************************************************/
		248
170	static AV *	249	static AV *
171	coro_clone_padlist (CV *cv)	250	coro_clone_padlist (pTHX_ CV *cv)
172	{	251	{
173	AV *padlist = CvPADLIST (cv);	252	AV *padlist = CvPADLIST (cv);
174	AV newpadlist, newpad;	253	AV newpadlist, newpad;
175		254
176	newpadlist = newAV ();	255	newpadlist = newAV ();
…		…
188		267
189	return newpadlist;	268	return newpadlist;
190	}	269	}
191		270
192	static void	271	static void
193	free_padlist (AV *padlist)	272	free_padlist (pTHX_ AV *padlist)
194	{	273	{
195	/* may be during global destruction */	274	/* may be during global destruction */
196	if (SvREFCNT (padlist))	275	if (SvREFCNT (padlist))
197	{	276	{
198	I32 i = AvFILLp (padlist);	277	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	298	AV *padlist;
220	AV av = (AV )mg->mg_obj;	299	AV av = (AV )mg->mg_obj;
221		300
222	/* casting is fun. */	301	/* casting is fun. */
223	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	302	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
224	free_padlist (padlist);	303	free_padlist (aTHX_ padlist);
225		304
226	SvREFCNT_dec (av);	305	SvREFCNT_dec (av);
227		306
228	return 0;	307	return 0;
229	}	308	}
230		309
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	310	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		311
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	312	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		313
		314	#define CORO_MAGIC(cv) \
		315	SvMAGIC (cv) \
		316	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		317	? SvMAGIC (cv) \
		318	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		319	: 0
		320
		321	static struct coro *
		322	SvSTATE_ (pTHX_ SV *coro)
		323	{
		324	HV *stash;
		325	MAGIC *mg;
		326
		327	if (SvROK (coro))
		328	coro = SvRV (coro);
		329
		330	if (SvTYPE (coro) != SVt_PVHV)
		331	croak ("Coro::State object required");
		332
		333	stash = SvSTASH (coro);
		334	if (stash != coro_stash && stash != coro_state_stash)
		335	{
		336	/* very slow, but rare, check */
		337	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		338	croak ("Coro::State object required");
		339	}
		340
		341	mg = CORO_MAGIC (coro);
		342	return (struct coro *)mg->mg_ptr;
		343	}
		344
		345	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		346
235	/* the next two functions merely cache the padlists */	347	/* the next two functions merely cache the padlists */
236	static void	348	static void
237	get_padlist (CV *cv)	349	get_padlist (pTHX_ CV *cv)
238	{	350	{
239	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	351	MAGIC *mg = CORO_MAGIC (cv);
		352	AV *av;
240		353
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	354	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	355	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	356	else
244	{	357	{
245	#if 0	358	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	359	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	360	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	361	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	362	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	363	SvREFCNT_dec (cp);
251	#else	364	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	365	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	366	#endif
254	}	367	}
255	}	368	}
256		369
257	static void	370	static void
258	put_padlist (CV *cv)	371	put_padlist (pTHX_ CV *cv)
259	{	372	{
260	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	373	MAGIC *mg = CORO_MAGIC (cv);
		374	AV *av;
261		375
262	if (!mg)	376	if (!mg)
263	{	377	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	378	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	379	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	380	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	381	mg->mg_obj = (SV *)newAV ();
268	}	382	}
269		383
270	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	384	av = (AV *)mg->mg_obj;
271	}
272		385
273	#define SB do {	386	if (AvFILLp (av) >= AvMAX (av))
274	#define SE } while (0)	387	av_extend (av, AvMAX (av) + 1);
275		388
276	#define LOAD(state) load_state((state));	389	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	#define SAVE(state,flags) save_state((state),(flags));	390	}
278		391
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	392	/ load & save, init *****************************************************/
280		393
281	static void	394	static void
282	load_state(Coro__State c)	395	load_perl (pTHX_ Coro__State c)
283	{	396	{
284	PL_dowarn = c->dowarn;	397	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	398	# include "state.h"
		399	#undef VAR
286		400
287	PL_curstackinfo = c->curstackinfo;	401	GvSV (PL_defgv) = c->defsv;
288	PL_curstack = c->curstack;	402	GvAV (PL_defgv) = c->defav;
289	PL_mainstack = c->mainstack;	403	GvSV (PL_errgv) = c->errsv;
290	PL_stack_sp = c->stack_sp;	404	GvSV (irsgv) = c->irssv_sv;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321		405
322	{	406	{
323	dSP;	407	dSP;
324	CV *cv;	408	CV *cv;
325		409
326	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
328	{	412	{
329	AV padlist = (AV )POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
335	}	415	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	416	}
339		417
340	PUTBACK;	418	PUTBACK;
341	}	419	}
342	}	420	}
343		421
344	static void	422	static void
345	save_state(Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
346	{	424	{
347	{	425	{
348	dSP;	426	dSP;
349	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	431	/*
354	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
356	*/	434	*/
357		435
358	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
360	for (;;)	438	for (;;)
361	{	439	{
362	while (cxix >= 0)	440	while (cxix >= 0)
363	{	441	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
365		443
366	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
367	{	445	{
368	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
369	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
370	{	449	{
371	EXTEND (SP, CvDEPTH(cv)*2);	450	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
382		454
		455	CvDEPTH (cv) = 0;
383	get_padlist (cv);	456	get_padlist (aTHX_ cv);
384	}	457	}
385	}	458	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	459	}
395		460
396	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
397	break;	462	break;
398		463
399	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
400	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
401	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
402	}	467	}
403		468
404	PUTBACK;	469	PUTBACK;
405	}	470	}
406		471
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = GvAV (PL_defgv);
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = DEFSV;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = ERRSV;
		475	c->irssv_sv = GvSV (irsgv);
410		476
411	c->dowarn = PL_dowarn;	477	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	478	# include "state.h"
413		479	#undef VAR
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;
418	c->op = PL_op;
419	c->curpad = PL_curpad;
420	c->comppad = PL_comppad;
421	c->compcv = PL_compcv;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	480	}
445		481
446	/*	482	/*
447	* allocate various perl stacks. This is an exact copy	483	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	484	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	485	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	486	* not usually need a lot of stackspace.
451	*/	487	*/
		488	#if CORO_PREFER_PERL_FUNCTIONS
		489	# define coro_init_stacks init_stacks
		490	#else
452	static void	491	static void
453	coro_init_stacks ()	492	coro_init_stacks (pTHX)
454	{	493	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	494	PL_curstackinfo = new_stackinfo(64, 6);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	495	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	496	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	497	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		498
460	PL_stack_base = AvARRAY(PL_curstack);	499	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	500	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	501	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		502
464	New(50,PL_tmps_stack,96,SV*);	503	New(50,PL_tmps_stack,64,SV*);
465	PL_tmps_floor = -1;	504	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	505	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	506	PL_tmps_max = 64;
468		507
469	New(54,PL_markstack,16,I32);	508	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	509	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	510	PL_markstack_max = PL_markstack + 16;
472		511
…		…
476		515
477	New(54,PL_scopestack,16,I32);	516	New(54,PL_scopestack,16,I32);
478	PL_scopestack_ix = 0;	517	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	518	PL_scopestack_max = 16;
480		519
481	New(54,PL_savestack,96,ANY);	520	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	521	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	522	PL_savestack_max = 64;
484		523
485	#if !PERL_VERSION_ATLEAST (5,9,0)	524	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	525	New(54,PL_retstack,4,OP*);
487	PL_retstack_ix = 0;	526	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	527	PL_retstack_max = 4;
489	#endif	528	#endif
490	}	529	}
		530	#endif
491		531
492	/*	532	/*
493	* destroy the stacks, the callchain etc...	533	* destroy the stacks, the callchain etc...
494	*/	534	*/
495	static void	535	static void
496	destroy_stacks()	536	coro_destroy_stacks (pTHX)
497	{	537	{
498	if (!IN_DESTRUCT)
499	{
500	/* is this ugly, I ask? */
501	LEAVE_SCOPE (0);
502
503	/* sure it is, but more important: is it correct?? :/ */
504	FREETMPS;
505
506	/POPSTACK_TO (PL_mainstack);//D//use/
507	}
508
509	while (PL_curstackinfo->si_next)	538	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	539	PL_curstackinfo = PL_curstackinfo->si_next;
511		540
512	while (PL_curstackinfo)	541	while (PL_curstackinfo)
513	{	542	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	543	PERL_SI *p = PL_curstackinfo->si_prev;
515		544
516	{ /D//remove/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/D//remove/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	546	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		547
528	Safefree (PL_curstackinfo->si_cxstack);	548	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	549	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	550	PL_curstackinfo = p;
531	}	551	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	557	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	558	Safefree (PL_retstack);
539	#endif	559	#endif
540	}	560	}
541		561
542	static void	562	static size_t
543	setup_coro (struct coro *coro)	563	coro_rss (pTHX_ struct coro *coro)
		564	{
		565	size_t rss = sizeof (*coro);
		566
		567	if (coro->mainstack)
		568	{
		569	if (coro->flags & CF_RUNNING)
		570	{
		571	#define VAR(name,type)coro->name = PL_ ## name;
		572	# include "state.h"
		573	#undef VAR
		574	}
		575
		576	rss += sizeof (coro->curstackinfo);
		577	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		578	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		579	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		580	rss += coro->tmps_max * sizeof (SV *);
		581	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		582	rss += coro->scopestack_max * sizeof (I32);
		583	rss += coro->savestack_max * sizeof (ANY);
		584
		585	#if !PERL_VERSION_ATLEAST (5,9,0)
		586	rss += coro->retstack_max * sizeof (OP *);
		587	#endif
		588	}
		589
		590	return rss;
		591	}
		592
		593	/ coroutine stack handling **********************************************/
		594
		595	static void
		596	coro_setup (pTHX_ struct coro *coro)
544	{	597	{
545	/*	598	/*
546	* emulate part of the perl startup here.	599	* emulate part of the perl startup here.
547	*/	600	*/
548	dTHX;	601	coro_init_stacks (aTHX);
		602
		603	PL_runops = RUNOPS_DEFAULT;
		604	PL_curcop = &PL_compiling;
		605	PL_in_eval = EVAL_NULL;
		606	PL_comppad = 0;
		607	PL_curpm = 0;
		608	PL_localizing = 0;
		609	PL_dirty = 0;
		610	PL_restartop = 0;
		611
		612	GvSV (PL_defgv) = newSV (0);
		613	GvAV (PL_defgv) = coro->args; coro->args = 0;
		614	GvSV (PL_errgv) = newSV (0);
		615	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		616	PL_rs = newSVsv (GvSV (irsgv));
		617	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		618
		619	ENTER; /* necessary e.g. for dounwind */
		620
		621	{
		622	dSP;
		623	LOGOP myop;
		624
		625	Zero (&myop, 1, LOGOP);
		626	myop.op_next = Nullop;
		627	myop.op_flags = OPf_WANT_VOID;
		628
		629	PUSHMARK (SP);
		630	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		631	PUTBACK;
		632	PL_op = (OP *)&myop;
		633	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		634	SPAGAIN;
		635	}
		636	}
		637
		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
		672	free_coro_mortal (pTHX)
		673	{
		674	if (coro_mortal)
		675	{
		676	SvREFCNT_dec (coro_mortal);
		677	coro_mortal = 0;
		678	}
		679	}
		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	av_extend (av, top - bot);
		714	while (bot < top)
		715	av_push (av, SvREFCNT_inc (*bot++));
		716
		717	PL_runops = RUNOPS_DEFAULT;
		718	ENTER;
		719	SAVETMPS;
		720	EXTEND (SP, 3);
		721	PUSHMARK (SP);
		722	PUSHs (&PL_sv_no);
		723	PUSHs (fullname);
		724	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		725	PUTBACK;
		726	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		727	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		728	SPAGAIN;
		729	FREETMPS;
		730	LEAVE;
		731	PL_runops = runops_trace;
		732	}
		733
		734	if (oldcop != PL_curcop)
		735	{
		736	oldcop = PL_curcop;
		737
		738	if (PL_curcop != &PL_compiling)
		739	{
		740	SV **cb;
		741
		742	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		743	{
		744	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		745
		746	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		747	{
		748	runops_proc_t old_runops = PL_runops;
		749	dSP;
		750	GV *gv = CvGV (cx->blk_sub.cv);
		751	SV *fullname = sv_2mortal (newSV (0));
		752
		753	if (isGV (gv))
		754	gv_efullname3 (fullname, gv, 0);
		755
		756	PL_runops = RUNOPS_DEFAULT;
		757	ENTER;
		758	SAVETMPS;
		759	EXTEND (SP, 3);
		760	PUSHMARK (SP);
		761	PUSHs (&PL_sv_yes);
		762	PUSHs (fullname);
		763	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		764	PUTBACK;
		765	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		766	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		767	SPAGAIN;
		768	FREETMPS;
		769	LEAVE;
		770	PL_runops = runops_trace;
		771	}
		772
		773	oldcxix = cxstack_ix;
		774	}
		775
		776	if (cctx->flags & CC_TRACE_LINE)
		777	{
		778	dSP;
		779
		780	PL_runops = RUNOPS_DEFAULT;
		781	ENTER;
		782	SAVETMPS;
		783	EXTEND (SP, 3);
		784	PL_runops = RUNOPS_DEFAULT;
		785	PUSHMARK (SP);
		786	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		787	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		788	PUTBACK;
		789	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		790	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		791	SPAGAIN;
		792	FREETMPS;
		793	LEAVE;
		794	PL_runops = runops_trace;
		795	}
		796	}
		797	}
		798	}
		799	}
		800
		801	TAINT_NOT;
		802	return 0;
		803	}
		804
		805	/* inject a fake call to Coro::State::_cctx_init into the execution */
		806	/* _cctx_init should be careful, as it could be called at almost any time */
		807	/* during execution of a perl program */
		808	static void NOINLINE
		809	prepare_cctx (pTHX_ coro_cctx *cctx)
		810	{
549	dSP;	811	dSP;
550	UNOP myop;	812	LOGOP myop;
551	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
552		813
553	coro_init_stacks ();	814	PL_top_env = &PL_start_env;
554	/PL_curcop = 0;/
555	/PL_in_eval = PL_in_eval;/ /* inherit */
556	SvREFCNT_dec (GvAV (PL_defgv));
557	GvAV (PL_defgv) = coro->args; coro->args = 0;
558		815
559	SPAGAIN;	816	if (cctx->flags & CC_TRACE)
		817	PL_runops = runops_trace;
560		818
561	Zero (&myop, 1, UNOP);	819	Zero (&myop, 1, LOGOP);
562	myop.op_next = Nullop;	820	myop.op_next = PL_op;
563	myop.op_flags = OPf_WANT_VOID;	821	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
564		822
		823	PUSHMARK (SP);
		824	EXTEND (SP, 2);
		825	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		826	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		827	PUTBACK;
565	PL_op = (OP *)&myop;	828	PL_op = (OP *)&myop;
566
567	PUSHMARK(SP);
568	XPUSHs (sub_init);
569	PUTBACK;
570	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	829	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571	SPAGAIN;	830	SPAGAIN;
572
573	ENTER; /* necessary e.g. for dounwind */
574	}	831	}
575		832
		833	/*
		834	* this is a _very_ stripped down perl interpreter ;)
		835	*/
576	static void	836	static void
577	free_coro_mortal ()	837	coro_run (void *arg)
578	{	838	{
579	if (coro_mortal)	839	dTHX;
580	{	840
581	SvREFCNT_dec (coro_mortal);	841	/* coro_run is the alternative tail of transfer(), so unlock here. */
582	coro_mortal = 0;	842	UNLOCK;
		843
		844	/* we now skip the entersub that lead to transfer() */
		845	PL_op = PL_op->op_next;
		846
		847	/* inject a fake subroutine call to cctx_init */
		848	prepare_cctx (aTHX_ (coro_cctx *)arg);
		849
		850	/* somebody or something will hit me for both perl_run and PL_restartop */
		851	PL_restartop = PL_op;
		852	perl_run (PL_curinterp);
		853
		854	/*
		855	* If perl-run returns we assume exit() was being called or the coro
		856	* fell off the end, which seems to be the only valid (non-bug)
		857	* reason for perl_run to return. We try to exit by jumping to the
		858	* bootstrap-time "top" top_env, as we cannot restore the "main"
		859	* coroutine as Coro has no such concept
		860	*/
		861	PL_top_env = main_top_env;
		862	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		863	}
		864
		865	static coro_cctx *
		866	cctx_new ()
		867	{
		868	coro_cctx *cctx;
		869	void *stack_start;
		870	size_t stack_size;
		871
		872	++cctx_count;
		873
		874	Newz (0, cctx, 1, coro_cctx);
		875
		876	#if HAVE_MMAP
		877
		878	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		879	/* mmap supposedly does allocate-on-write for us */
		880	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		881
		882	if (cctx->sptr != (void *)-1)
583	}	883	{
		884	# if CORO_STACKGUARD
		885	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		886	# endif
		887	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		888	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		889	cctx->flags \|= CC_MAPPED;
		890	}
		891	else
		892	#endif
		893	{
		894	cctx->ssize = coro_stacksize * (long)sizeof (long);
		895	New (0, cctx->sptr, coro_stacksize, long);
		896
		897	if (!cctx->sptr)
		898	{
		899	perror ("FATAL: unable to allocate stack for coroutine");
		900	_exit (EXIT_FAILURE);
		901	}
		902
		903	stack_start = cctx->sptr;
		904	stack_size = cctx->ssize;
		905	}
		906
		907	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		908	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		909
		910	return cctx;
584	}	911	}
		912
		913	static void
		914	cctx_destroy (coro_cctx *cctx)
		915	{
		916	if (!cctx)
		917	return;
		918
		919	--cctx_count;
		920
		921	#if CORO_USE_VALGRIND
		922	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		923	#endif
		924
		925	#if HAVE_MMAP
		926	if (cctx->flags & CC_MAPPED)
		927	munmap (cctx->sptr, cctx->ssize);
		928	else
		929	#endif
		930	Safefree (cctx->sptr);
		931
		932	Safefree (cctx);
		933	}
		934
		935	/* wether this cctx should be destructed */
		936	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		937
		938	static coro_cctx *
		939	cctx_get (pTHX)
		940	{
		941	while (cctx_first)
		942	{
		943	coro_cctx *cctx = cctx_first;
		944	cctx_first = cctx->next;
		945	--cctx_idle;
		946
		947	if (!CCTX_EXPIRED (cctx))
		948	return cctx;
		949
		950	cctx_destroy (cctx);
		951	}
		952
		953	return cctx_new ();
		954	}
		955
		956	static void
		957	cctx_put (coro_cctx *cctx)
		958	{
		959	/* free another cctx if overlimit */
		960	if (cctx_idle >= MAX_IDLE_CCTX)
		961	{
		962	coro_cctx *first = cctx_first;
		963	cctx_first = first->next;
		964	--cctx_idle;
		965
		966	cctx_destroy (first);
		967	}
		968
		969	++cctx_idle;
		970	cctx->next = cctx_first;
		971	cctx_first = cctx;
		972	}
		973
		974	/ coroutine switching ***************************************************/
585		975
586	static void NOINLINE	976	static void NOINLINE
587	prepare_cctx (coro_stack *cctx)	977	transfer_check (pTHX_ struct coro prev, struct coro next)
588	{	978	{
589	dSP;	979	if (prev != next)
590	UNOP myop;
591
592	Zero (&myop, 1, UNOP);
593	myop.op_next = PL_op;
594	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
595
596	PUSHMARK(SP);
597	EXTEND (SP, 2);
598	PUSHs (newSViv (PTR2IV (cctx)));
599	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600	PUTBACK;
601	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602	SPAGAIN;
603	}
604
605	static void
606	coro_run (void *arg)
607	{
608	/*
609	* this is a _very_ stripped down perl interpreter ;)
610	*/
611	UNLOCK;
612
613	PL_top_env = &PL_start_env;
614	prepare_cctx ((coro_stack *)arg);
615
616	/* somebody will hit me for both perl_run and PL_restartop */
617	perl_run (PERL_GET_CONTEXT);
618
619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
620	abort ();
621	}
622
623	static coro_stack *
624	stack_new ()
625	{
626	coro_stack *stack;
627
628	New (0, stack, 1, coro_stack);
629
630	#if HAVE_MMAP
631
632	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633	/* mmap suppsedly does allocate-on-write for us */
634	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
635
636	if (stack->sptr == (void *)-1)
637	{
638	perror ("FATAL: unable to mmap stack for coroutine");
639	_exit (EXIT_FAILURE);
640	}
641
642	# if STACKGUARD
643	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644	# endif
645
646	#else
647
648	stack->ssize = STACKSIZE * (long)sizeof (long);
649	New (0, stack->sptr, STACKSIZE, long);
650
651	if (!stack->sptr)
652	{
653	perror (stderr, "FATAL: unable to malloc stack for coroutine");
654	_exit (EXIT_FAILURE);
655	}
656
657	#endif
658
659	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
660
661	return stack;
662	}
663
664	static void
665	stack_free (coro_stack *stack)
666	{
667	if (!stack)
668	return;
669
670	#if HAVE_MMAP
671	munmap (stack->sptr, stack->ssize);
672	#else
673	Safefree (stack->sptr);
674	#endif
675
676	Safefree (stack);
677	}
678
679	static coro_stack *stack_first;
680
681	static coro_stack *
682	stack_get ()
683	{
684	coro_stack *stack;
685
686	if (stack_first)
687	{
688	stack = stack_first;
689	stack_first = stack->next;
690	}
691	else
692	{	980	{
693	stack = stack_new ();	981	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
694	PL_op = PL_op->op_next;	982	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		983
		984	if (next->flags & CF_RUNNING)
		985	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		986
		987	if (next->flags & CF_DESTROYED)
		988	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		989
		990	if (PL_lex_state != LEX_NOTPARSING)
		991	croak ("Coro::State::transfer called while parsing, but this is not supported");
695	}	992	}
696
697	return stack;
698	}	993	}
699		994
700	static void	995	/* always use the TRANSFER macro */
701	stack_put (coro_stack *stack)
702	{
703	stack->next = stack_first;
704	stack_first = stack;
705	}
706
707	/* never call directly, always through the coro_state_transfer global variable */
708	static void NOINLINE	996	static void NOINLINE
709	transfer (struct coro prev, struct coro next, int flags)	997	transfer (pTHX_ struct coro prev, struct coro next)
710	{	998	{
711	dSTACKLEVEL;	999	dSTACKLEVEL;
712		1000
713	/* sometimes transfer is only called to set idle_sp */	1001	/* sometimes transfer is only called to set idle_sp */
714	if (flags == TRANSFER_SET_STACKLEVEL)	1002	if (!next)
		1003	{
715	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1004	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1005	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1006	}
716	else if (prev != next)	1007	else if (prev != next)
717	{	1008	{
718	coro_stack *prev__stack;	1009	coro_cctx *prev__cctx;
		1010
		1011	if (prev->flags & CF_NEW)
		1012	{
		1013	/* create a new empty context */
		1014	Newz (0, prev->cctx, 1, coro_cctx);
		1015	prev->flags &= ~CF_NEW;
		1016	prev->flags \|= CF_RUNNING;
		1017	}
		1018
		1019	prev->flags &= ~CF_RUNNING;
		1020	next->flags \|= CF_RUNNING;
719		1021
720	LOCK;	1022	LOCK;
721		1023
722	if (next->mainstack)	1024	if (next->flags & CF_NEW)
723	{	1025	{
724	/* coroutine already started */	1026	/* need to start coroutine */
725	SAVE (prev, flags);	1027	next->flags &= ~CF_NEW;
726	LOAD (next);	1028	/* first get rid of the old state */
		1029	save_perl (aTHX_ prev);
		1030	/* setup coroutine call */
		1031	coro_setup (aTHX_ next);
727	}	1032	}
728	else	1033	else
729	{	1034	{
730	/* need to start coroutine */	1035	/* coroutine already started */
731	/* first get rid of the old state */	1036	save_perl (aTHX_ prev);
732	SAVE (prev, -1);	1037	load_perl (aTHX_ next);
733	/* setup coroutine call */
734	setup_coro (next);
735	/* need a stack */
736	next->stack = 0;
737	}	1038	}
738		1039
739	if (!prev->stack)
740	/* create a new empty context */
741	Newz (0, prev->stack, 1, coro_stack);
742
743	prev__stack = prev->stack;	1040	prev__cctx = prev->cctx;
744		1041
745	/* possibly "free" the stack */	1042	/* possibly "free" the cctx */
746	if (prev__stack->idle_sp == STACKLEVEL)	1043	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
747	{	1044	{
748	stack_put (prev__stack);	1045	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1046	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1047
749	prev->stack = 0;	1048	prev->cctx = 0;
		1049
		1050	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1051	if (CCTX_EXPIRED (prev__cctx))
		1052	next->cctx = cctx_get (aTHX);
		1053
		1054	cctx_put (prev__cctx);
750	}	1055	}
751		1056
		1057	++next->usecount;
		1058
752	if (!next->stack)	1059	if (!next->cctx)
753	next->stack = stack_get ();	1060	next->cctx = cctx_get (aTHX);
754		1061
755	if (prev__stack != next->stack)	1062	if (prev__cctx != next->cctx)
756	{	1063	{
757	prev__stack->top_env = PL_top_env;	1064	prev__cctx->top_env = PL_top_env;
758	PL_top_env = next->stack->top_env;	1065	PL_top_env = next->cctx->top_env;
759	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1066	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
760	}	1067	}
761		1068
762	free_coro_mortal ();	1069	free_coro_mortal (aTHX);
763
764	UNLOCK;	1070	UNLOCK;
765	}	1071	}
766	}	1072	}
767		1073
768	struct transfer_args	1074	struct transfer_args
769	{	1075	{
770	struct coro prev, next;	1076	struct coro prev, next;
771	int flags;
772	};	1077	};
773		1078
774	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1079	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1080	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
775		1081
		1082	/ high level stuff ******************************************************/
		1083
776	static void	1084	static int
777	coro_state_destroy (struct coro *coro)	1085	coro_state_destroy (pTHX_ struct coro *coro)
778	{	1086	{
779	if (coro->refcnt--)	1087	if (coro->flags & CF_DESTROYED)
780	return;	1088	return 0;
		1089
		1090	coro->flags \|= CF_DESTROYED;
		1091
		1092	if (coro->flags & CF_READY)
		1093	{
		1094	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1095	/* alternative: look through all ready queues and remove the coro */
		1096	LOCK;
		1097	--coro_nready;
		1098	UNLOCK;
		1099	}
		1100	else
		1101	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
781		1102
782	if (coro->mainstack && coro->mainstack != main_mainstack)	1103	if (coro->mainstack && coro->mainstack != main_mainstack)
783	{	1104	{
784	struct coro temp;	1105	struct coro temp;
785		1106
786	SAVE ((&temp), TRANSFER_SAVE_ALL);	1107	if (coro->flags & CF_RUNNING)
787	LOAD (coro);	1108	croak ("FATAL: tried to destroy currently running coroutine");
788		1109
789	destroy_stacks ();	1110	save_perl (aTHX_ &temp);
		1111	load_perl (aTHX_ coro);
790		1112
		1113	coro_destroy (aTHX_ coro);
		1114
791	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1115	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
792		1116
793	coro->mainstack = 0;	1117	coro->mainstack = 0;
794	}	1118	}
795		1119
796	stack_free (coro->stack);	1120	cctx_destroy (coro->cctx);
797	SvREFCNT_dec (coro->args);	1121	SvREFCNT_dec (coro->args);
798	Safefree (coro);	1122
		1123	if (coro->next) coro->next->prev = coro->prev;
		1124	if (coro->prev) coro->prev->next = coro->next;
		1125	if (coro == coro_first) coro_first = coro->next;
		1126
		1127	return 1;
799	}	1128	}
800		1129
801	static int	1130	static int
802	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1131	coro_state_free (pTHX_ SV sv, MAGIC mg)
803	{	1132	{
804	struct coro coro = (struct coro )mg->mg_ptr;	1133	struct coro coro = (struct coro )mg->mg_ptr;
805	mg->mg_ptr = 0;	1134	mg->mg_ptr = 0;
806		1135
		1136	coro->hv = 0;
		1137
		1138	if (--coro->refcnt < 0)
		1139	{
807	coro_state_destroy (coro);	1140	coro_state_destroy (aTHX_ coro);
		1141	Safefree (coro);
		1142	}
808		1143
809	return 0;	1144	return 0;
810	}	1145	}
811		1146
812	static int	1147	static int
…		…
819	return 0;	1154	return 0;
820	}	1155	}
821		1156
822	static MGVTBL coro_state_vtbl = {	1157	static MGVTBL coro_state_vtbl = {
823	0, 0, 0, 0,	1158	0, 0, 0, 0,
824	coro_state_clear,	1159	coro_state_free,
825	0,	1160	0,
826	#ifdef MGf_DUP	1161	#ifdef MGf_DUP
827	coro_state_dup,	1162	coro_state_dup,
		1163	#else
		1164	# define MGf_DUP 0
828	#endif	1165	#endif
829	};	1166	};
830		1167
831	static struct coro *
832	SvSTATE (SV *coro)
833	{
834	HV *stash;
835	MAGIC *mg;
836
837	if (SvROK (coro))
838	coro = SvRV (coro);
839
840	stash = SvSTASH (coro);
841	if (stash != coro_stash && stash != coro_state_stash)
842	{
843	/* very slow, but rare, check */
844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845	croak ("Coro::State object required");
846	}
847
848	mg = SvMAGIC (coro);
849	assert (mg->mg_type == PERL_MAGIC_ext);
850	return (struct coro *)mg->mg_ptr;
851	}
852
853	static void	1168	static void
854	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1169	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
855	{	1170	{
856	ta->prev = SvSTATE (prev);	1171	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	1172	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;	1173	TRANSFER_CHECK (*ta);
859	}	1174	}
860		1175
861	static void	1176	static void
862	api_transfer (SV prev, SV next, int flags)	1177	api_transfer (SV prev_sv, SV next_sv)
863	{	1178	{
864	dTHX;	1179	dTHX;
865	struct transfer_args ta;	1180	struct transfer_args ta;
866		1181
867	prepare_transfer (&ta, prev, next, flags);	1182	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	1183	TRANSFER (ta);
869	}	1184	}
870		1185
871	/ Coro ******************************************************************/	1186	/ Coro ******************************************************************/
872		1187
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV coro_current, coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	1188	static void
886	coro_enq (SV *sv)	1189	coro_enq (pTHX_ SV *coro_sv)
887	{	1190	{
888	int prio;
889
890	if (SvTYPE (sv) != SVt_PVHV)
891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893	prio = SvSTATE (sv)->prio;
894
895	av_push (coro_ready [prio - PRIO_MIN], sv);	1191	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;
897	}	1192	}
898		1193
899	static SV *	1194	static SV *
900	coro_deq (int min_prio)	1195	coro_deq (pTHX_ int min_prio)
901	{	1196	{
902	int prio = PRIO_MAX - PRIO_MIN;	1197	int prio = PRIO_MAX - PRIO_MIN;
903		1198
904	min_prio -= PRIO_MIN;	1199	min_prio -= PRIO_MIN;
905	if (min_prio < 0)	1200	if (min_prio < 0)
906	min_prio = 0;	1201	min_prio = 0;
907		1202
908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1203	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909	if (AvFILLp (coro_ready [prio]) >= 0)	1204	if (AvFILLp (coro_ready [prio]) >= 0)
910	{
911	coro_nready--;
912	return av_shift (coro_ready [prio]);	1205	return av_shift (coro_ready [prio]);
913	}
914		1206
915	return 0;	1207	return 0;
916	}	1208	}
917		1209
918	static void	1210	static int
919	api_ready (SV *coro)	1211	api_ready (SV *coro_sv)
920	{	1212	{
921	dTHX;	1213	dTHX;
		1214	struct coro *coro;
922		1215
923	if (SvROK (coro))	1216	if (SvROK (coro_sv))
924	coro = SvRV (coro);	1217	coro_sv = SvRV (coro_sv);
		1218
		1219	coro = SvSTATE (coro_sv);
		1220
		1221	if (coro->flags & CF_READY)
		1222	return 0;
		1223
		1224	coro->flags \|= CF_READY;
925		1225
926	LOCK;	1226	LOCK;
927	coro_enq (SvREFCNT_inc (coro));	1227	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1228	++coro_nready;
928	UNLOCK;	1229	UNLOCK;
929	}
930		1230
		1231	return 1;
		1232	}
		1233
931	static void	1234	static int
		1235	api_is_ready (SV *coro_sv)
		1236	{
		1237	dTHX;
		1238	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1239	}
		1240
		1241	static void
932	prepare_schedule (struct transfer_args *ta)	1242	prepare_schedule (pTHX_ struct transfer_args *ta)
933	{	1243	{
934	SV current, prev, *next;	1244	SV prev_sv, next_sv;
935
936	current = GvSV (coro_current);
937		1245
938	for (;;)	1246	for (;;)
939	{	1247	{
940	LOCK;	1248	LOCK;
941	next = coro_deq (PRIO_MIN);	1249	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1250
		1251	/* nothing to schedule: call the idle handler */
		1252	if (!next_sv)
		1253	{
		1254	dSP;
		1255	UNLOCK;
		1256
		1257	ENTER;
		1258	SAVETMPS;
		1259
		1260	PUSHMARK (SP);
		1261	PUTBACK;
		1262	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1263
		1264	FREETMPS;
		1265	LEAVE;
		1266	continue;
		1267	}
		1268
		1269	ta->next = SvSTATE (next_sv);
		1270
		1271	/* cannot transfer to destroyed coros, skip and look for next */
		1272	if (ta->next->flags & CF_DESTROYED)
		1273	{
		1274	UNLOCK;
		1275	SvREFCNT_dec (next_sv);
		1276	/* coro_nready is already taken care of by destroy */
		1277	continue;
		1278	}
		1279
		1280	--coro_nready;
942	UNLOCK;	1281	UNLOCK;
943
944	if (next)
945	break;	1282	break;
946
947	{
948	dSP;
949
950	ENTER;
951	SAVETMPS;
952
953	PUSHMARK (SP);
954	PUTBACK;
955	call_sv (GvSV (coro_idle), G_DISCARD);
956
957	FREETMPS;
958	LEAVE;
959	}	1283	}
960	}
961
962	prev = SvRV (current);
963	SvRV (current) = next;
964		1284
965	/* free this only after the transfer */	1285	/* free this only after the transfer */
		1286	prev_sv = SvRV (coro_current);
		1287	ta->prev = SvSTATE (prev_sv);
		1288	TRANSFER_CHECK (*ta);
		1289	assert (ta->next->flags & CF_READY);
		1290	ta->next->flags &= ~CF_READY;
		1291	SvRV_set (coro_current, next_sv);
		1292
966	LOCK;	1293	LOCK;
967	free_coro_mortal ();	1294	free_coro_mortal (aTHX);
		1295	coro_mortal = prev_sv;
968	UNLOCK;	1296	UNLOCK;
969	coro_mortal = prev;
970
971	ta->prev = SvSTATE (prev);
972	ta->next = SvSTATE (next);
973	ta->flags = TRANSFER_SAVE_ALL;
974	}	1297	}
975		1298
976	static void	1299	static void
977	prepare_cede (struct transfer_args *ta)	1300	prepare_cede (pTHX_ struct transfer_args *ta)
978	{	1301	{
979	LOCK;	1302	api_ready (coro_current);
980	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981	UNLOCK;
982
983	prepare_schedule (ta);	1303	prepare_schedule (aTHX_ ta);
		1304	}
		1305
		1306	static int
		1307	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1308	{
		1309	if (coro_nready)
		1310	{
		1311	SV *prev = SvRV (coro_current);
		1312	prepare_schedule (aTHX_ ta);
		1313	api_ready (prev);
		1314	return 1;
		1315	}
		1316	else
		1317	return 0;
984	}	1318	}
985		1319
986	static void	1320	static void
987	api_schedule (void)	1321	api_schedule (void)
988	{	1322	{
989	dTHX;	1323	dTHX;
990	struct transfer_args ta;	1324	struct transfer_args ta;
991		1325
992	prepare_schedule (&ta);	1326	prepare_schedule (aTHX_ &ta);
993	TRANSFER (ta);	1327	TRANSFER (ta);
994	}	1328	}
995		1329
996	static void	1330	static int
997	api_cede (void)	1331	api_cede (void)
998	{	1332	{
999	dTHX;	1333	dTHX;
1000	struct transfer_args ta;	1334	struct transfer_args ta;
1001		1335
1002	prepare_cede (&ta);	1336	prepare_cede (aTHX_ &ta);
		1337
		1338	if (ta.prev != ta.next)
		1339	{
1003	TRANSFER (ta);	1340	TRANSFER (ta);
		1341	return 1;
		1342	}
		1343	else
		1344	return 0;
1004	}	1345	}
1005		1346
		1347	static int
		1348	api_cede_notself (void)
		1349	{
		1350	dTHX;
		1351	struct transfer_args ta;
		1352
		1353	if (prepare_cede_notself (aTHX_ &ta))
		1354	{
		1355	TRANSFER (ta);
		1356	return 1;
		1357	}
		1358	else
		1359	return 0;
		1360	}
		1361
		1362	static void
		1363	api_trace (SV *coro_sv, int flags)
		1364	{
		1365	dTHX;
		1366	struct coro *coro = SvSTATE (coro_sv);
		1367
		1368	if (flags & CC_TRACE)
		1369	{
		1370	if (!coro->cctx)
		1371	coro->cctx = cctx_new ();
		1372	else if (!(coro->cctx->flags & CC_TRACE))
		1373	croak ("cannot enable tracing on coroutine with custom stack");
		1374
		1375	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1376	}
		1377	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1378	{
		1379	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1380
		1381	if (coro->flags & CF_RUNNING)
		1382	PL_runops = RUNOPS_DEFAULT;
		1383	else
		1384	coro->runops = RUNOPS_DEFAULT;
		1385	}
		1386	}
		1387
1006	MODULE = Coro::State PACKAGE = Coro::State	1388	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007		1389
1008	PROTOTYPES: DISABLE	1390	PROTOTYPES: DISABLE
1009		1391
1010	BOOT:	1392	BOOT:
1011	{	1393	{
1012	#ifdef USE_ITHREADS	1394	#ifdef USE_ITHREADS
1013	MUTEX_INIT (&coro_mutex);	1395	MUTEX_INIT (&coro_mutex);
1014	#endif	1396	#endif
1015	BOOT_PAGESIZE;	1397	BOOT_PAGESIZE;
1016		1398
		1399	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1400	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1401
1017	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1402	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018		1403
1019	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1404	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1405	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1406	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1407	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022		1408
1023	main_mainstack = PL_mainstack;	1409	main_mainstack = PL_mainstack;
		1410	main_top_env = PL_top_env;
		1411
		1412	while (main_top_env->je_prev)
		1413	main_top_env = main_top_env->je_prev;
1024		1414
1025	coroapi.ver = CORO_API_VERSION;	1415	coroapi.ver = CORO_API_VERSION;
1026	coroapi.transfer = api_transfer;	1416	coroapi.transfer = api_transfer;
1027		1417
1028	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1418	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1035	struct coro *coro;	1425	struct coro *coro;
1036	HV *hv;	1426	HV *hv;
1037	int i;	1427	int i;
1038		1428
1039	Newz (0, coro, 1, struct coro);	1429	Newz (0, coro, 1, struct coro);
1040	coro->args = newAV ();	1430	coro->args = newAV ();
		1431	coro->flags = CF_NEW;
1041		1432
		1433	if (coro_first) coro_first->prev = coro;
		1434	coro->next = coro_first;
		1435	coro_first = coro;
		1436
1042	hv = newHV ();	1437	coro->hv = hv = newHV ();
1043	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1438	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1044	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1439	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045		1440
		1441	av_extend (coro->args, items - 1);
1046	for (i = 1; i < items; i++)	1442	for (i = 1; i < items; i++)
1047	av_push (coro->args, newSVsv (ST (i)));	1443	av_push (coro->args, newSVsv (ST (i)));
1048
1049	/coro->mainstack = 0; //actual work is done inside transfer /
1050	/coro->stack = 0;/
1051	}	1444	}
1052	OUTPUT:	1445	OUTPUT:
1053	RETVAL	1446	RETVAL
1054		1447
		1448	# these not obviously related functions are all rolled into the same xs
		1449	# function to increase chances that they all will call transfer with the same
		1450	# stack offset
1055	void	1451	void
1056	_set_stacklevel (...)	1452	_set_stacklevel (...)
1057	ALIAS:	1453	ALIAS:
1058	Coro::State::transfer = 1	1454	Coro::State::transfer = 1
1059	Coro::schedule = 2	1455	Coro::schedule = 2
1060	Coro::cede = 3	1456	Coro::cede = 3
1061	Coro::Cont::yield = 4	1457	Coro::cede_notself = 4
1062	CODE:	1458	CODE:
1063	{	1459	{
1064	struct transfer_args ta;	1460	struct transfer_args ta;
1065		1461
1066	switch (ix)	1462	switch (ix)
1067	{	1463	{
1068	case 0:	1464	case 0:
1069	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1465	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1070	ta.next = 0;	1466	ta.next = 0;
1071	ta.flags = TRANSFER_SET_STACKLEVEL;
1072	break;	1467	break;
1073		1468
1074	case 1:	1469	case 1:
1075	if (items != 3)	1470	if (items != 2)
1076	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1471	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1077		1472
1078	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1473	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1079	break;	1474	break;
1080		1475
1081	case 2:	1476	case 2:
1082	prepare_schedule (&ta);	1477	prepare_schedule (aTHX_ &ta);
1083	break;	1478	break;
1084		1479
1085	case 3:	1480	case 3:
1086	prepare_cede (&ta);	1481	prepare_cede (aTHX_ &ta);
1087	break;	1482	break;
1088		1483
1089	case 4:	1484	case 4:
1090	{	1485	if (!prepare_cede_notself (aTHX_ &ta))
1091	SV *yieldstack;	1486	XSRETURN_EMPTY;
1092	SV *sv;
1093	AV *defav = GvAV (PL_defgv);
1094		1487
1095	yieldstack = *hv_fetch (
1096	(HV *)SvRV (GvSV (coro_current)),
1097	"yieldstack", sizeof ("yieldstack") - 1,
1098	0
1099	);
1100
1101	/* set up @_ -- ugly */
1102	av_clear (defav);
1103	av_fill (defav, items - 1);
1104	while (items--)
1105	av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107	sv = av_pop ((AV *)SvRV (yieldstack));
1108	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1109	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1110	ta.flags = 0;
1111	SvREFCNT_dec (sv);
1112	}
1113	break;	1488	break;
1114
1115	}	1489	}
1116		1490
		1491	BARRIER;
1117	TRANSFER (ta);	1492	TRANSFER (ta);
1118	}
1119		1493
1120	void	1494	if (GIMME_V != G_VOID && ta.next != ta.prev)
1121	_clone_state_from (SV dst, SV src)	1495	XSRETURN_YES;
		1496	}
		1497
		1498	bool
		1499	_destroy (SV *coro_sv)
1122	CODE:	1500	CODE:
1123	{	1501	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1124	struct coro *coro_src = SvSTATE (src);	1502	OUTPUT:
1125		1503	RETVAL
1126	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1127
1128	++coro_src->refcnt;
1129	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1130	}
1131		1504
1132	void	1505	void
1133	_exit (code)	1506	_exit (code)
1134	int code	1507	int code
1135	PROTOTYPE: $	1508	PROTOTYPE: $
1136	CODE:	1509	CODE:
1137	_exit (code);	1510	_exit (code);
1138		1511
		1512	int
		1513	cctx_stacksize (int new_stacksize = 0)
		1514	CODE:
		1515	RETVAL = coro_stacksize;
		1516	if (new_stacksize)
		1517	coro_stacksize = new_stacksize;
		1518	OUTPUT:
		1519	RETVAL
		1520
		1521	int
		1522	cctx_count ()
		1523	CODE:
		1524	RETVAL = cctx_count;
		1525	OUTPUT:
		1526	RETVAL
		1527
		1528	int
		1529	cctx_idle ()
		1530	CODE:
		1531	RETVAL = cctx_idle;
		1532	OUTPUT:
		1533	RETVAL
		1534
		1535	void
		1536	list ()
		1537	PPCODE:
		1538	{
		1539	struct coro *coro;
		1540	for (coro = coro_first; coro; coro = coro->next)
		1541	if (coro->hv)
		1542	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1543	}
		1544
		1545	void
		1546	call (Coro::State coro, SV *coderef)
		1547	ALIAS:
		1548	eval = 1
		1549	CODE:
		1550	{
		1551	if (coro->mainstack)
		1552	{
		1553	struct coro temp;
		1554	Zero (&temp, 1, struct coro);
		1555
		1556	if (!(coro->flags & CF_RUNNING))
		1557	{
		1558	save_perl (aTHX_ &temp);
		1559	load_perl (aTHX_ coro);
		1560	}
		1561
		1562	{
		1563	dSP;
		1564	ENTER;
		1565	SAVETMPS;
		1566	PUSHMARK (SP);
		1567	PUTBACK;
		1568	if (ix)
		1569	eval_sv (coderef, 0);
		1570	else
		1571	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1572	SPAGAIN;
		1573	FREETMPS;
		1574	LEAVE;
		1575	PUTBACK;
		1576	}
		1577
		1578	if (!(coro->flags & CF_RUNNING))
		1579	{
		1580	save_perl (aTHX_ coro);
		1581	load_perl (aTHX_ &temp);
		1582	}
		1583	}
		1584	}
		1585
		1586	SV *
		1587	is_ready (Coro::State coro)
		1588	PROTOTYPE: $
		1589	ALIAS:
		1590	is_ready = CF_READY
		1591	is_running = CF_RUNNING
		1592	is_new = CF_NEW
		1593	is_destroyed = CF_DESTROYED
		1594	CODE:
		1595	RETVAL = boolSV (coro->flags & ix);
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	void
		1600	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1601
		1602	SV *
		1603	has_stack (Coro::State coro)
		1604	PROTOTYPE: $
		1605	CODE:
		1606	RETVAL = boolSV (!!coro->cctx);
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	int
		1611	is_traced (Coro::State coro)
		1612	PROTOTYPE: $
		1613	CODE:
		1614	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618	IV
		1619	rss (Coro::State coro)
		1620	PROTOTYPE: $
		1621	ALIAS:
		1622	usecount = 1
		1623	CODE:
		1624	switch (ix)
		1625	{
		1626	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1627	case 1: RETVAL = coro->usecount; break;
		1628	}
		1629	OUTPUT:
		1630	RETVAL
		1631
		1632
1139	MODULE = Coro::State PACKAGE = Coro	1633	MODULE = Coro::State PACKAGE = Coro
1140		1634
1141	BOOT:	1635	BOOT:
1142	{	1636	{
1143	int i;	1637	int i;
		1638
		1639	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1640	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1641	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1642
		1643	coro_current = get_sv ("Coro::current", FALSE);
		1644	SvREADONLY_on (coro_current);
1144		1645
1145	coro_stash = gv_stashpv ("Coro", TRUE);	1646	coro_stash = gv_stashpv ("Coro", TRUE);
1146		1647
1147	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1648	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1148	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1649	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1149	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1650	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1651	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1652	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1653	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153		1654
1154	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1155	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1156
1157	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1655	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158	coro_ready[i] = newAV ();	1656	coro_ready[i] = newAV ();
1159		1657
1160	{	1658	{
1161	SV *sv = perl_get_sv("Coro::API", 1);	1659	SV *sv = perl_get_sv("Coro::API", 1);
1162		1660
1163	coroapi.schedule = api_schedule;	1661	coroapi.schedule = api_schedule;
1164	coroapi.cede = api_cede;	1662	coroapi.cede = api_cede;
		1663	coroapi.cede_notself = api_cede_notself;
1165	coroapi.ready = api_ready;	1664	coroapi.ready = api_ready;
		1665	coroapi.is_ready = api_is_ready;
1166	coroapi.nready = &coro_nready;	1666	coroapi.nready = &coro_nready;
1167	coroapi.current = coro_current;	1667	coroapi.current = coro_current;
1168		1668
1169	GCoroAPI = &coroapi;	1669	GCoroAPI = &coroapi;
1170	sv_setiv (sv, (IV)&coroapi);	1670	sv_setiv (sv, (IV)&coroapi);
1171	SvREADONLY_on (sv);	1671	SvREADONLY_on (sv);
1172	}	1672	}
1173	}	1673	}
		1674
		1675	void
		1676	_set_current (SV *current)
		1677	PROTOTYPE: $
		1678	CODE:
		1679	SvREFCNT_dec (SvRV (coro_current));
		1680	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1174		1681
1175	int	1682	int
1176	prio (Coro::State coro, int newprio = 0)	1683	prio (Coro::State coro, int newprio = 0)
1177	ALIAS:	1684	ALIAS:
1178	nice = 1	1685	nice = 1
…		…
1181	RETVAL = coro->prio;	1688	RETVAL = coro->prio;
1182		1689
1183	if (items > 1)	1690	if (items > 1)
1184	{	1691	{
1185	if (ix)	1692	if (ix)
1186	newprio += coro->prio;	1693	newprio = coro->prio - newprio;
1187		1694
1188	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1695	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1696	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190		1697
1191	coro->prio = newprio;	1698	coro->prio = newprio;
1192	}	1699	}
1193	}	1700	}
		1701	OUTPUT:
		1702	RETVAL
1194		1703
1195	void	1704	SV *
1196	ready (SV *self)	1705	ready (SV *self)
1197	PROTOTYPE: $	1706	PROTOTYPE: $
1198	CODE:	1707	CODE:
1199	api_ready (self);	1708	RETVAL = boolSV (api_ready (self));
		1709	OUTPUT:
		1710	RETVAL
1200		1711
1201	int	1712	int
1202	nready (...)	1713	nready (...)
1203	PROTOTYPE:	1714	PROTOTYPE:
1204	CODE:	1715	CODE:
1205	RETVAL = coro_nready;	1716	RETVAL = coro_nready;
1206	OUTPUT:	1717	OUTPUT:
1207	RETVAL	1718	RETVAL
1208		1719
		1720	# for async_pool speedup
		1721	void
		1722	_pool_1 (SV *cb)
		1723	CODE:
		1724	{
		1725	struct coro *coro = SvSTATE (coro_current);
		1726	HV hv = (HV )SvRV (coro_current);
		1727	AV *defav = GvAV (PL_defgv);
		1728	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1729	AV *invoke_av;
		1730	int i, len;
		1731
		1732	if (!invoke)
		1733	croak ("\3terminate\2\n");
		1734
		1735	SvREFCNT_dec (coro->saved_deffh);
		1736	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1737
		1738	hv_store (hv, "desc", sizeof ("desc") - 1,
		1739	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1740
		1741	invoke_av = (AV *)SvRV (invoke);
		1742	len = av_len (invoke_av);
		1743
		1744	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1745
		1746	if (len > 0)
		1747	{
		1748	av_fill (defav, len - 1);
		1749	for (i = 0; i < len; ++i)
		1750	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1751	}
		1752
		1753	SvREFCNT_dec (invoke);
		1754	}
		1755
		1756	void
		1757	_pool_2 (SV *cb)
		1758	CODE:
		1759	{
		1760	struct coro *coro = SvSTATE (coro_current);
		1761
		1762	sv_setsv (cb, &PL_sv_undef);
		1763
		1764	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1765	coro->saved_deffh = 0;
		1766
		1767	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1768	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1769	croak ("\3terminate\2\n");
		1770
		1771	av_clear (GvAV (PL_defgv));
		1772	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1773	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1774
		1775	coro->prio = 0;
		1776
		1777	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1778	api_trace (coro_current, 0);
		1779
		1780	av_push (av_async_pool, newSVsv (coro_current));
		1781	}
		1782
		1783
1209	MODULE = Coro::State PACKAGE = Coro::AIO	1784	MODULE = Coro::State PACKAGE = Coro::AIO
1210		1785
1211	SV *	1786	SV *
1212	_get_state ()	1787	_get_state ()
1213	CODE:	1788	CODE:
1214	{	1789	{
1215	struct {	1790	struct io_state *data;
1216	int errorno;
1217	int laststype;
1218	int laststatval;
1219	Stat_t statcache;
1220	} data;
1221		1791
		1792	RETVAL = newSV (sizeof (struct io_state));
		1793	data = (struct io_state *)SvPVX (RETVAL);
		1794	SvCUR_set (RETVAL, sizeof (struct io_state));
		1795	SvPOK_only (RETVAL);
		1796
1222	data.errorno = errno;	1797	data->errorno = errno;
1223	data.laststype = PL_laststype;	1798	data->laststype = PL_laststype;
1224	data.laststatval = PL_laststatval;	1799	data->laststatval = PL_laststatval;
1225	data.statcache = PL_statcache;	1800	data->statcache = PL_statcache;
1226
1227	RETVAL = newSVpvn ((char *)&data, sizeof data);
1228	}	1801	}
1229	OUTPUT:	1802	OUTPUT:
1230	RETVAL	1803	RETVAL
1231		1804
1232	void	1805	void
1233	_set_state (char *data_)	1806	_set_state (char *data_)
1234	PROTOTYPE: $	1807	PROTOTYPE: $
1235	CODE:	1808	CODE:
1236	{	1809	{
1237	struct {	1810	struct io_state data = (void )data_;
1238	int errorno;
1239	int laststype;
1240	int laststatval;
1241	Stat_t statcache;
1242	} data = (void )data_;
1243		1811
1244	errno = data->errorno;	1812	errno = data->errorno;
1245	PL_laststype = data->laststype;	1813	PL_laststype = data->laststype;
1246	PL_laststatval = data->laststatval;	1814	PL_laststatval = data->laststatval;
1247	PL_statcache = data->statcache;	1815	PL_statcache = data->statcache;
1248	}	1816	}
		1817

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Comparing Coro/Coro/State.xs (file contents): Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs. Revision 1.193 by root, Fri Oct 5 23:38:40 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs.
Revision 1.193 by root, Fri Oct 5 23:38:40 2007 UTC