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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.173 by root, Sun Sep 30 13:41:45 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	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
		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)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
63		92
64	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	94	* portable way as possible. */
66	* and should be unique. */	95	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
68		97
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		99
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
72		109
73	#include "CoroAPI.h"	110	#include "CoroAPI.h"
74		111
75	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
79	#else	116	#else
80	# define LOCK (void)0	117	# define LOCK (void)0
81	# define UNLOCK (void)0	118	# define UNLOCK (void)0
82	#endif	119	#endif
83		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;
84	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
85	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;
86	static HV coro_state_stash, coro_stash;	134	static HV coro_state_stash, coro_stash;
87	static SV coro_mortal; / will be freed after next transfer */	135	static SV coro_mortal; / will be freed after next transfer */
88		136
89	/* this is actually not only the c stack but also c registers etc... */	137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		152	};
		153
		154	/* this is a structure representing a c-level coroutine */
90	typedef struct {	155	typedef struct coro_cctx {
91	int refcnt; /* pointer reference counter */	156	struct coro_cctx *next;
92	int usecnt; /* shared by how many coroutines */
93	int gencnt; /* generation counter */
94		157
		158	/* the stack */
		159	void *sptr;
		160	size_t ssize;
		161
		162	/* cpu state */
		163	void idle_sp; / sp of top-level transfer/schedule/cede call */
		164	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		165	JMPENV *top_env;
95	coro_context cctx;	166	coro_context cctx;
96		167
97	void *sptr;	168	#if CORO_USE_VALGRIND
98	long ssize; /* positive == mmap, otherwise malloc */	169	int valgrind_id;
99	} coro_stack;	170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
100		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
		180
		181	/* this is a structure representing a perl-level coroutine */
101	struct coro {	182	struct coro {
102	/* the optional C context */	183	/* the c coroutine allocated to this perl coroutine, if any */
103	coro_stack *stack;	184	coro_cctx *cctx;
104	void *cursp;
105	int gencnt;
106
107	/* optionally saved, might be zero */
108	AV *defav;
109	SV *defsv;
110	SV *errsv;
111
112	/* saved global state not related to stacks */
113	U8 dowarn;
114	I32 in_eval;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		185
150	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
151	AV *args;	187	AV *args;
152	int refcnt;	188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
		191
		192	/* optionally saved, might be zero */
		193	AV defav; / @_ */
		194	SV defsv; / $_ */
		195	SV errsv; / $@ */
		196	GV deffh; / default filehandle */
		197	SV irssv; / $/ */
		198	SV irssv_sv; / real $/ cache */
		199
		200	#define VAR(name,type) type name;
		201	# include "state.h"
		202	#undef VAR
		203
		204	/* statistics */
		205	int usecount; /* number of switches to this coro */
		206
		207	/* coro process data */
		208	int prio;
		209
		210	/* linked list */
		211	struct coro next, prev;
		212	HV hv; / the perl hash associated with this coro, if any */
153	};	213	};
154		214
155	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
157		217
		218	/ Coro ******************************************************************/
		219
		220	#define PRIO_MAX 3
		221	#define PRIO_HIGH 1
		222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/ lowlevel stuff ********************************************************/
		234
158	static AV *	235	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	236	coro_clone_padlist (pTHX_ CV *cv)
160	{	237	{
161	AV *padlist = CvPADLIST (cv);	238	AV *padlist = CvPADLIST (cv);
162	AV newpadlist, newpad;	239	AV newpadlist, newpad;
163		240
164	newpadlist = newAV ();	241	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	242	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	243	#if PERL_VERSION_ATLEAST (5,9,0)
		244	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		245	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	246	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	247	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	248	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	249	--AvFILLp (padlist);
173		250
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	251	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		295
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	296	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		297
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	298	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		299
		300	#define CORO_MAGIC(cv) \
		301	SvMAGIC (cv) \
		302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		303	? SvMAGIC (cv) \
		304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		305	: 0
		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		332
223	/* the next two functions merely cache the padlists */	333	/* the next two functions merely cache the padlists */
224	static void	334	static void
225	get_padlist (pTHX_ CV *cv)	335	get_padlist (pTHX_ CV *cv)
226	{	336	{
227	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	337	MAGIC *mg = CORO_MAGIC (cv);
		338	AV *av;
228		339
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	342	else
232	{	343	{
233	#if 0	344	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	345	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	346	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	347	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	348	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	349	SvREFCNT_dec (cp);
239	#else	350	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	354	}
244		355
245	static void	356	static void
246	put_padlist (pTHX_ CV *cv)	357	put_padlist (pTHX_ CV *cv)
247	{	358	{
248	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	359	MAGIC *mg = CORO_MAGIC (cv);
		360	AV *av;
249		361
250	if (!mg)	362	if (!mg)
251	{	363	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	364	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	365	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	366	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	367	mg->mg_obj = (SV *)newAV ();
256	}	368	}
257		369
258	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	370	av = (AV *)mg->mg_obj;
		371
		372	if (AvFILLp (av) >= AvMAX (av))
		373	av_extend (av, AvMAX (av) + 1);
		374
		375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	376	}
		377
		378	/ load & save, init *****************************************************/
260		379
261	#define SB do {	380	#define SB do {
262	#define SE } while (0)	381	#define SE } while (0)
263		382
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		384
269	static void	385	static void
270	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
271	{	387	{
272	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	389	# include "state.h"
274		390	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		391
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		400	{
		401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
		403	}
		404	else
		405	{
		406	REPLACE_SV (PL_rs, c->irssv);
		407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		408	sv_setsv (c->irssv_sv, PL_rs);
		409	}
		410	}
310		411
311	{	412	{
312	dSP;	413	dSP;
313	CV *cv;	414	CV *cv;
314		415
315	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
317	{	418	{
318	AV padlist = (AV )POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	420	CvDEPTH (cv) = PTR2IV (POPs);
324	}	421	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	422	}
328		423
329	PUTBACK;	424	PUTBACK;
330	}	425	}
331	}	426	}
332		427
333	static void	428	static void
334	save_state(pTHX_ Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
335	{	430	{
336	{	431	{
337	dSP;	432	dSP;
338	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	437	/*
343	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
345	*/	440	*/
346		441
347	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
349	for (;;)	444	for (;;)
350	{	445	{
351	while (cxix >= 0)	446	while (cxix >= 0)
352	{	447	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
354		449
355	if (CxTYPE(cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
356	{	451	{
357	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
		453
358	if (CvDEPTH(cv))	454	if (CvDEPTH (cv))
359	{	455	{
360	EXTEND (SP, CvDEPTH(cv)*2);	456	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	457	PUSHs ((SV *)CvPADLIST (cv));
		458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
371		460
		461	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	462	get_padlist (aTHX_ cv);
373	}	463	}
374	}	464	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	465	}
384		466
385	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
386	break;	468	break;
387		469
388	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
391	}	473	}
392		474
393	PUTBACK;	475	PUTBACK;
394	}	476	}
395		477
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
399		483
400	c->dowarn = PL_dowarn;	484	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	485	# include "state.h"
402		486	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	487	}
435		488
436	/*	489	/*
437	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	492	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	493	* not usually need a lot of stackspace.
441	*/	494	*/
		495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
442	static void	498	static void
443	coro_init_stacks (pTHX)	499	coro_init_stacks (pTHX)
444	{	500	{
445	LOCK;	501	PL_curstackinfo = new_stackinfo(64, 6);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		505
452	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		509
456	New(50,PL_tmps_stack,96,SV*);	510	New(50,PL_tmps_stack,64,SV*);
457	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	513	PL_tmps_max = 64;
460		514
461	New(54,PL_markstack,16,I32);	515	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	517	PL_markstack_max = PL_markstack + 16;
464		518
…		…
468		522
469	New(54,PL_scopestack,16,I32);	523	New(54,PL_scopestack,16,I32);
470	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	525	PL_scopestack_max = 16;
472		526
473	New(54,PL_savestack,96,ANY);	527	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	529	PL_savestack_max = 64;
476		530
477	#if PERL_VERSION < 9	531	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	532	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	534	PL_retstack_max = 4;
481	#endif	535	#endif
482
483	UNLOCK;
484	}	536	}
		537	#endif
485		538
486	/*	539	/*
487	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
488	*/	541	*/
489	static void	542	static void
490	destroy_stacks(pTHX)	543	coro_destroy_stacks (pTHX)
491	{	544	{
492	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
493	{	546	{
494	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
495	LEAVE_SCOPE (0);	548	LEAVE_SCOPE (0);
		549	assert (PL_tmps_floor == -1);
496		550
497	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
498	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
499		554
		555	/* unwind all extra stacks */
500	/POPSTACK_TO (PL_mainstack);//D//use/	556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
501	}	560	}
502		561
503	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
505		564
506	while (PL_curstackinfo)	565	while (PL_curstackinfo)
507	{	566	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
509		568
510	{ /D//remove/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/D//remove/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		571
522	Safefree (PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	573	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	574	PL_curstackinfo = p;
525	}	575	}
526		576
527	Safefree (PL_tmps_stack);	577	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	578	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	579	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	580	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	581	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	582	Safefree (PL_retstack);
533	#endif	583	#endif
534	}	584	}
535		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/ coroutine stack handling **********************************************/
		618
536	static void	619	static void
537	allocate_stack (Coro__State ctx, int alloc)	620	setup_coro (pTHX_ struct coro *coro)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546
547	if (alloc)
548	{
549	#if HAVE_MMAP
550	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
552	if (stack->sptr != (void *)-1)
553	{
554	# if STACKGUARD
555	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
556	# endif
557	}
558	else
559	#endif
560	{
561	stack->ssize = - (STACKSIZE * (long)sizeof (long));
562	New (0, stack->sptr, STACKSIZE, long);
563	}
564	}
565	else
566	stack->sptr = 0;
567
568	ctx->stack = stack;
569	}
570
571	static void
572	deallocate_stack (Coro__State ctx)
573	{
574	coro_stack *stack = ctx->stack;
575
576	ctx->stack = 0;
577
578	if (stack)
579	{
580	if (!--stack->refcnt)
581	{
582	#ifdef HAVE_MMAP
583	if (stack->ssize > 0 && stack->sptr)
584	munmap (stack->sptr, stack->ssize);
585	else
586	#endif
587	Safefree (stack->sptr);
588
589	Safefree (stack);
590	}
591	else if (ctx->gencnt == stack->gencnt)
592	--stack->usecnt;
593	}
594	}
595
596	static void
597	setup_coro (void *arg)
598	{	621	{
599	/*	622	/*
600	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
601	*/	624	*/
		625	coro_init_stacks (aTHX);
		626
		627	PL_runops = RUNOPS_DEFAULT;
		628	PL_curcop = &PL_compiling;
		629	PL_in_eval = EVAL_NULL;
		630	PL_comppad = 0;
		631	PL_curpm = 0;
		632	PL_localizing = 0;
		633	PL_dirty = 0;
		634	PL_restartop = 0;
		635
		636	{
		637	dSP;
		638	LOGOP myop;
		639
		640	SvREFCNT_dec (GvAV (PL_defgv));
		641	GvAV (PL_defgv) = coro->args; coro->args = 0;
		642
		643	Zero (&myop, 1, LOGOP);
		644	myop.op_next = Nullop;
		645	myop.op_flags = OPf_WANT_VOID;
		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
		650	PL_op = (OP *)&myop;
		651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		652	SPAGAIN;
		653	}
		654
		655	ENTER; /* necessary e.g. for dounwind */
		656	}
		657
		658	static void
		659	free_coro_mortal (pTHX)
		660	{
		661	if (coro_mortal)
		662	{
		663	SvREFCNT_dec (coro_mortal);
		664	coro_mortal = 0;
		665	}
		666	}
		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (cctx->flags & CC_TRACE_ALL)
		681	{
		682	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		683	{
		684	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		685	SV bot, top;
		686	AV av = newAV (); / return values */
		687	SV **cb;
		688	dSP;
		689
		690	GV *gv = CvGV (cx->blk_sub.cv);
		691	SV *fullname = sv_2mortal (newSV (0));
		692	if (isGV (gv))
		693	gv_efullname3 (fullname, gv, 0);
		694
		695	bot = PL_stack_base + cx->blk_oldsp + 1;
		696	top = cx->blk_gimme == G_ARRAY ? SP + 1
		697	: cx->blk_gimme == G_SCALAR ? bot + 1
		698	: bot;
		699
		700	while (bot < top)
		701	av_push (av, SvREFCNT_inc (*bot++));
		702
		703	PL_runops = RUNOPS_DEFAULT;
		704	ENTER;
		705	SAVETMPS;
		706	EXTEND (SP, 3);
		707	PUSHMARK (SP);
		708	PUSHs (&PL_sv_no);
		709	PUSHs (fullname);
		710	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		711	PUTBACK;
		712	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		713	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		714	SPAGAIN;
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = runops_trace;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	runops_proc_t old_runops = PL_runops;
		735	dSP;
		736	GV *gv = CvGV (cx->blk_sub.cv);
		737	SV *fullname = sv_2mortal (newSV (0));
		738
		739	if (isGV (gv))
		740	gv_efullname3 (fullname, gv, 0);
		741
		742	PL_runops = RUNOPS_DEFAULT;
		743	ENTER;
		744	SAVETMPS;
		745	EXTEND (SP, 3);
		746	PUSHMARK (SP);
		747	PUSHs (&PL_sv_yes);
		748	PUSHs (fullname);
		749	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		750	PUTBACK;
		751	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		752	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		753	SPAGAIN;
		754	FREETMPS;
		755	LEAVE;
		756	PL_runops = runops_trace;
		757	}
		758
		759	oldcxix = cxstack_ix;
		760	}
		761
		762	if (cctx->flags & CC_TRACE_LINE)
		763	{
		764	dSP;
		765
		766	PL_runops = RUNOPS_DEFAULT;
		767	ENTER;
		768	SAVETMPS;
		769	EXTEND (SP, 3);
		770	PL_runops = RUNOPS_DEFAULT;
		771	PUSHMARK (SP);
		772	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		773	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		774	PUTBACK;
		775	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		776	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		777	SPAGAIN;
		778	FREETMPS;
		779	LEAVE;
		780	PL_runops = runops_trace;
		781	}
		782	}
		783	}
		784	}
		785	}
		786
		787	TAINT_NOT;
		788	return 0;
		789	}
		790
		791	/* inject a fake call to Coro::State::_cctx_init into the execution */
		792	/* _cctx_init should be careful, as it could be called at almost any time */
		793	/* during execution of a perl program */
		794	static void NOINLINE
		795	prepare_cctx (pTHX_ coro_cctx *cctx)
		796	{
		797	dSP;
		798	LOGOP myop;
		799
		800	PL_top_env = &PL_start_env;
		801
		802	if (cctx->flags & CC_TRACE)
		803	PL_runops = runops_trace;
		804
		805	Zero (&myop, 1, LOGOP);
		806	myop.op_next = PL_op;
		807	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		808
		809	PUSHMARK (SP);
		810	EXTEND (SP, 2);
		811	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		812	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		813	PUTBACK;
		814	PL_op = (OP *)&myop;
		815	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		816	SPAGAIN;
		817	}
		818
		819	/*
		820	* this is a _very_ stripped down perl interpreter ;)
		821	*/
		822	static void
		823	coro_run (void *arg)
		824	{
602	dTHX;	825	dTHX;
603	dSP;
604	Coro__State ctx = (Coro__State)arg;
605	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
606		826
607	coro_init_stacks (aTHX);	827	/* coro_run is the alternative tail of transfer(), so unlock here. */
608	/PL_curcop = 0;/	828	UNLOCK;
609	/PL_in_eval = PL_in_eval;/ /* inherit */
610	SvREFCNT_dec (GvAV (PL_defgv));
611	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
612		829
613	SPAGAIN;	830	/* we now skip the entersub that lead to transfer() */
		831	PL_op = PL_op->op_next;
614		832
615	if (ctx->stack)	833	/* inject a fake subroutine call to cctx_init */
616	{	834	prepare_cctx (aTHX_ (coro_cctx *)arg);
617	ctx->cursp = 0;
618		835
619	PUSHMARK(SP);	836	/* somebody or something will hit me for both perl_run and PL_restartop */
620	PUTBACK;	837	PL_restartop = PL_op;
621	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);	838	perl_run (PL_curinterp);
622		839
623	if (SvTRUE (ERRSV))	840	/*
624	croak (NULL);	841	* If perl-run returns we assume exit() was being called or the coro
625	else	842	* fell off the end, which seems to be the only valid (non-bug)
626	croak ("FATAL: CCTXT coroutine returned!");	843	* reason for perl_run to return. We try to exit by jumping to the
		844	* bootstrap-time "top" top_env, as we cannot restore the "main"
		845	* coroutine as Coro has no such concept
		846	*/
		847	PL_top_env = main_top_env;
		848	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		849	}
		850
		851	static coro_cctx *
		852	cctx_new ()
		853	{
		854	coro_cctx *cctx;
		855	void *stack_start;
		856	size_t stack_size;
		857
		858	++cctx_count;
		859
		860	Newz (0, cctx, 1, coro_cctx);
		861
		862	#if HAVE_MMAP
		863
		864	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		865	/* mmap supposedly does allocate-on-write for us */
		866	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		867
		868	if (cctx->sptr != (void *)-1)
		869	{
		870	# if CORO_STACKGUARD
		871	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		872	# endif
		873	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		874	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		875	cctx->flags \|= CC_MAPPED;
627	}	876	}
628	else	877	else
629	{	878	#endif
630	UNOP myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PL_op = (OP *)&myop;
637
638	PUSHMARK(SP);
639	XPUSHs (sub_init);
640	/*
641	* the next line is slightly wrong, as PL_op->op_next
642	* is actually being executed so we skip the first op.
643	* that doesn't matter, though, since it is only
644	* pp_nextstate and we never return...
645	* ah yes, and I don't care anyways ;)
646	*/
647	PUTBACK;
648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;
650
651	ENTER; /* necessary e.g. for dounwind */
652	}	879	{
		880	cctx->ssize = coro_stacksize * (long)sizeof (long);
		881	New (0, cctx->sptr, coro_stacksize, long);
		882
		883	if (!cctx->sptr)
		884	{
		885	perror ("FATAL: unable to allocate stack for coroutine");
		886	_exit (EXIT_FAILURE);
		887	}
		888
		889	stack_start = cctx->sptr;
		890	stack_size = cctx->ssize;
		891	}
		892
		893	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		894	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		895
		896	return cctx;
653	}	897	}
654		898
655	static void	899	static void
656	continue_coro (void *arg)	900	cctx_destroy (coro_cctx *cctx)
657	{	901	{
658	/*	902	if (!cctx)
659	* this is a _very_ stripped down perl interpreter ;)	903	return;
660	*/
661	dTHX;
662	Coro__State ctx = (Coro__State)arg;
663		904
664	PL_top_env = &PL_start_env;	905	--cctx_count;
665		906
666	ctx->cursp = 0;	907	#if CORO_USE_VALGRIND
667	PL_op = PL_op->op_next;	908	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
668	CALLRUNOPS(aTHX);	909	#endif
669		910
670	abort ();	911	#if HAVE_MMAP
671	}	912	if (cctx->flags & CC_MAPPED)
		913	munmap (cctx->sptr, cctx->ssize);
		914	else
		915	#endif
		916	Safefree (cctx->sptr);
672		917
673	/* never call directly, always through the coro_state_transfer global variable */	918	Safefree (cctx);
		919	}
		920
		921	static coro_cctx *
		922	cctx_get (pTHX)
		923	{
		924	while (cctx_first)
		925	{
		926	coro_cctx *cctx = cctx_first;
		927	cctx_first = cctx->next;
		928	--cctx_idle;
		929
		930	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		931	return cctx;
		932
		933	cctx_destroy (cctx);
		934	}
		935
		936	return cctx_new ();
		937	}
		938
674	static void	939	static void
		940	cctx_put (coro_cctx *cctx)
		941	{
		942	/* free another cctx if overlimit */
		943	if (cctx_idle >= MAX_IDLE_CCTX)
		944	{
		945	coro_cctx *first = cctx_first;
		946	cctx_first = first->next;
		947	--cctx_idle;
		948
		949	cctx_destroy (first);
		950	}
		951
		952	++cctx_idle;
		953	cctx->next = cctx_first;
		954	cctx_first = cctx;
		955	}
		956
		957	/ coroutine switching ***************************************************/
		958
		959	static void NOINLINE
		960	transfer_check (pTHX_ struct coro prev, struct coro next)
		961	{
		962	if (prev != next)
		963	{
		964	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		965	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		966
		967	if (next->flags & CF_RUNNING)
		968	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		969
		970	if (next->flags & CF_DESTROYED)
		971	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		972
		973	if (PL_lex_state != LEX_NOTPARSING)
		974	croak ("Coro::State::transfer called while parsing, but this is not supported");
		975	}
		976	}
		977
		978	/* always use the TRANSFER macro */
		979	static void NOINLINE
675	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	980	transfer (pTHX_ struct coro prev, struct coro next)
676	{	981	{
677	dSTACKLEVEL;	982	dSTACKLEVEL;
678		983
		984	/* sometimes transfer is only called to set idle_sp */
		985	if (!next)
		986	{
		987	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		988	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		989	}
679	if (prev != next)	990	else if (prev != next)
680	{	991	{
681	/* has this coro been created yet? */	992	coro_cctx *prev__cctx;
682	if (next->mainstack)	993
		994	if (prev->flags & CF_NEW)
683	{	995	{
684	LOCK;	996	/* create a new empty context */
685	SAVE (prev, flags);	997	Newz (0, prev->cctx, 1, coro_cctx);
686	LOAD (next);	998	prev->flags &= ~CF_NEW;
687	UNLOCK;	999	prev->flags \|= CF_RUNNING;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}	1000	}
722	else if (next->tmps_ix == -2)	1001
723	croak ("tried to transfer to running coroutine");	1002	prev->flags &= ~CF_RUNNING;
		1003	next->flags \|= CF_RUNNING;
		1004
		1005	LOCK;
		1006
		1007	if (next->flags & CF_NEW)
		1008	{
		1009	/* need to start coroutine */
		1010	next->flags &= ~CF_NEW;
		1011	/* first get rid of the old state */
		1012	save_perl (aTHX_ prev);
		1013	/* setup coroutine call */
		1014	setup_coro (aTHX_ next);
		1015	}
724	else	1016	else
725	{	1017	{
726	LOCK;	1018	/* coroutine already started */
727	SAVE (prev, -1); /* first get rid of the old state */	1019	save_perl (aTHX_ prev);
728	UNLOCK;	1020	load_perl (aTHX_ next);
729
730	/* create the coroutine for the first time */
731	if (flags & TRANSFER_SAVE_CCTXT)
732	{
733	if (!prev->stack)
734	allocate_stack (prev, 0);
735
736	/* the new coroutine starts with start_env again */
737	PL_top_env = &PL_start_env;
738
739	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
740	{
741	setup_coro (next);
742	next->cursp = stacklevel;
743
744	prev->stack->refcnt++;
745	prev->stack->usecnt++;
746	next->stack = prev->stack;
747	next->gencnt = prev->gencnt;
748	}
749	else
750	{
751	assert (!next->stack);
752	allocate_stack (next, 1);
753	coro_create (&(next->stack->cctx),
754	setup_coro, (void *)next,
755	next->stack->sptr, labs (next->stack->ssize));
756	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
757	prev->cursp = stacklevel;
758	/* don't add any code here */
759	}
760	}
761	else
762	{
763	setup_coro (next);
764	next->cursp = stacklevel;
765	}
766	}	1021	}
767	}
768		1022
769	LOCK;	1023	prev__cctx = prev->cctx;
770	if (coro_mortal)	1024
771	{	1025	/* possibly "free" the cctx */
772	SvREFCNT_dec (coro_mortal);	1026	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
773	coro_mortal = 0;	1027	{
774	}	1028	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1029	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1030
		1031	prev->cctx = 0;
		1032
		1033	cctx_put (prev__cctx);
		1034	}
		1035
		1036	++next->usecount;
		1037
		1038	if (!next->cctx)
		1039	next->cctx = cctx_get (aTHX);
		1040
		1041	if (prev__cctx != next->cctx)
		1042	{
		1043	prev__cctx->top_env = PL_top_env;
		1044	PL_top_env = next->cctx->top_env;
		1045	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1046	}
		1047
		1048	free_coro_mortal (aTHX);
775	UNLOCK;	1049	UNLOCK;
		1050	}
776	}	1051	}
777		1052
778	/* use this function pointer to call the above function */	1053	struct transfer_args
779	/* this is done to increase chances of the compiler not inlining the call */	1054	{
780	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	1055	struct coro prev, next;
		1056	};
781		1057
		1058	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1059	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1060
		1061	/ high level stuff ******************************************************/
		1062
782	static void	1063	static int
783	coro_state_destroy (struct coro *coro)	1064	coro_state_destroy (pTHX_ struct coro *coro)
784	{	1065	{
785	if (coro->refcnt--)	1066	if (coro->flags & CF_DESTROYED)
786	return;	1067	return 0;
		1068
		1069	coro->flags \|= CF_DESTROYED;
		1070
		1071	if (coro->flags & CF_READY)
		1072	{
		1073	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1074	/* alternative: look through all ready queues and remove the coro */
		1075	LOCK;
		1076	--coro_nready;
		1077	UNLOCK;
		1078	}
		1079	else
		1080	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
787		1081
788	if (coro->mainstack && coro->mainstack != main_mainstack)	1082	if (coro->mainstack && coro->mainstack != main_mainstack)
789	{	1083	{
790	struct coro temp;	1084	struct coro temp;
791		1085
792	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1086	assert (!(coro->flags & CF_RUNNING));
		1087
		1088	Zero (&temp, 1, struct coro);
		1089	temp.save = CORO_SAVE_ALL;
		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
793	LOAD (aTHX_ coro);	1095	load_perl (aTHX_ coro);
794		1096
795	destroy_stacks (aTHX);	1097	coro_destroy_stacks (aTHX);
796		1098
797	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
798		1100
799	coro->mainstack = 0;	1101	coro->mainstack = 0;
800	}	1102	}
801		1103
802	deallocate_stack (coro);	1104	cctx_destroy (coro->cctx);
803	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
804	Safefree (coro);	1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
805	}	1112	}
806		1113
807	static int	1114	static int
808	coro_state_clear (SV sv, MAGIC mg)	1115	coro_state_free (pTHX_ SV sv, MAGIC mg)
809	{	1116	{
810	struct coro coro = (struct coro )mg->mg_ptr;	1117	struct coro coro = (struct coro )mg->mg_ptr;
811	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
812		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
813	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
814		1127
815	return 0;	1128	return 0;
816	}	1129	}
817		1130
818	static int	1131	static int
819	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1132	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
820	{	1133	{
821	struct coro coro = (struct coro )mg->mg_ptr;	1134	struct coro coro = (struct coro )mg->mg_ptr;
822		1135
823	++coro->refcnt;	1136	++coro->refcnt;
824		1137
825	return 0;	1138	return 0;
826	}	1139	}
827		1140
828	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1141	static MGVTBL coro_state_vtbl = {
829		1142	0, 0, 0, 0,
830	static struct coro *	1143	coro_state_free,
831	SvSTATE (SV *coro)	1144	0,
832	{	1145	#ifdef MGf_DUP
833	HV *stash;	1146	coro_state_dup,
834	MAGIC *mg;	1147	#else
835		1148	# define MGf_DUP 0
836	if (SvROK (coro))	1149	#endif
837	coro = SvRV (coro);	1150	};
838
839	stash = SvSTASH (coro);
840	if (stash != coro_stash && stash != coro_state_stash)
841	{
842	/* very slow, but rare, check */
843	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
844	croak ("Coro::State object required");
845	}
846
847	mg = SvMAGIC (coro);
848	assert (mg->mg_type == PERL_MAGIC_ext);
849	return (struct coro *)mg->mg_ptr;
850	}
851		1151
852	static void	1152	static void
		1153	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1154	{
		1155	ta->prev = SvSTATE (prev_sv);
		1156	ta->next = SvSTATE (next_sv);
		1157	TRANSFER_CHECK (*ta);
		1158	}
		1159
		1160	static void
853	api_transfer (pTHX_ SV prev, SV next, int flags)	1161	api_transfer (SV prev_sv, SV next_sv)
854	{	1162	{
855	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1163	dTHX;
		1164	struct transfer_args ta;
		1165
		1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1167	TRANSFER (ta);
		1168	}
		1169
		1170	static int
		1171	api_save (SV *coro_sv, int new_save)
		1172	{
		1173	dTHX;
		1174	struct coro *coro = SvSTATE (coro_sv);
		1175	int old_save = coro->save;
		1176
		1177	if (new_save >= 0)
		1178	coro->save = new_save;
		1179
		1180	return old_save;
856	}	1181	}
857		1182
858	/ Coro ******************************************************************/	1183	/ Coro ******************************************************************/
859		1184
860	#define PRIO_MAX 3
861	#define PRIO_HIGH 1
862	#define PRIO_NORMAL 0
863	#define PRIO_LOW -1
864	#define PRIO_IDLE -3
865	#define PRIO_MIN -4
866
867	/* for Coro.pm */
868	static GV coro_current, coro_idle;
869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870	static int coro_nready;
871
872	static void	1185	static void
873	coro_enq (pTHX_ SV *sv)	1186	coro_enq (pTHX_ SV *coro_sv)
874	{	1187	{
875	int prio;
876
877	if (SvTYPE (sv) != SVt_PVHV)
878	croak ("Coro::ready tried to enqueue something that is not a coroutine");
879
880	prio = SvSTATE (sv)->prio;
881
882	av_push (coro_ready [prio - PRIO_MIN], sv);	1188	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
883	coro_nready++;
884	}	1189	}
885		1190
886	static SV *	1191	static SV *
887	coro_deq (pTHX_ int min_prio)	1192	coro_deq (pTHX_ int min_prio)
888	{	1193	{
…		…
892	if (min_prio < 0)	1197	if (min_prio < 0)
893	min_prio = 0;	1198	min_prio = 0;
894		1199
895	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1200	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
896	if (AvFILLp (coro_ready [prio]) >= 0)	1201	if (AvFILLp (coro_ready [prio]) >= 0)
897	{
898	coro_nready--;
899	return av_shift (coro_ready [prio]);	1202	return av_shift (coro_ready [prio]);
900	}
901		1203
902	return 0;	1204	return 0;
903	}	1205	}
904		1206
		1207	static int
		1208	api_ready (SV *coro_sv)
		1209	{
		1210	dTHX;
		1211	struct coro *coro;
		1212
		1213	if (SvROK (coro_sv))
		1214	coro_sv = SvRV (coro_sv);
		1215
		1216	coro = SvSTATE (coro_sv);
		1217
		1218	if (coro->flags & CF_READY)
		1219	return 0;
		1220
		1221	coro->flags \|= CF_READY;
		1222
		1223	LOCK;
		1224	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1225	++coro_nready;
		1226	UNLOCK;
		1227
		1228	return 1;
		1229	}
		1230
		1231	static int
		1232	api_is_ready (SV *coro_sv)
		1233	{
		1234	dTHX;
		1235	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1236	}
		1237
905	static void	1238	static void
906	api_ready (SV *coro)	1239	prepare_schedule (pTHX_ struct transfer_args *ta)
907	{	1240	{
908	dTHX;	1241	SV prev_sv, next_sv;
909		1242
910	if (SvROK (coro))	1243	for (;;)
911	coro = SvRV (coro);	1244	{
		1245	LOCK;
		1246	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1247
		1248	/* nothing to schedule: call the idle handler */
		1249	if (!next_sv)
		1250	{
		1251	dSP;
		1252	UNLOCK;
		1253
		1254	ENTER;
		1255	SAVETMPS;
		1256
		1257	PUSHMARK (SP);
		1258	PUTBACK;
		1259	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1260
		1261	FREETMPS;
		1262	LEAVE;
		1263	continue;
		1264	}
		1265
		1266	ta->next = SvSTATE (next_sv);
		1267
		1268	/* cannot transfer to destroyed coros, skip and look for next */
		1269	if (ta->next->flags & CF_DESTROYED)
		1270	{
		1271	UNLOCK;
		1272	SvREFCNT_dec (next_sv);
		1273	/* coro_nready is already taken care of by destroy */
		1274	continue;
		1275	}
		1276
		1277	--coro_nready;
		1278	UNLOCK;
		1279	break;
		1280	}
		1281
		1282	/* free this only after the transfer */
		1283	prev_sv = SvRV (coro_current);
		1284	ta->prev = SvSTATE (prev_sv);
		1285	TRANSFER_CHECK (*ta);
		1286	assert (ta->next->flags & CF_READY);
		1287	ta->next->flags &= ~CF_READY;
		1288	SvRV_set (coro_current, next_sv);
912		1289
913	LOCK;	1290	LOCK;
914	coro_enq (aTHX_ SvREFCNT_inc (coro));	1291	free_coro_mortal (aTHX);
		1292	coro_mortal = prev_sv;
915	UNLOCK;	1293	UNLOCK;
		1294	}
		1295
		1296	static void
		1297	prepare_cede (pTHX_ struct transfer_args *ta)
		1298	{
		1299	api_ready (coro_current);
		1300	prepare_schedule (aTHX_ ta);
		1301	}
		1302
		1303	static int
		1304	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1305	{
		1306	if (coro_nready)
		1307	{
		1308	SV *prev = SvRV (coro_current);
		1309	prepare_schedule (aTHX_ ta);
		1310	api_ready (prev);
		1311	return 1;
		1312	}
		1313	else
		1314	return 0;
916	}	1315	}
917		1316
918	static void	1317	static void
919	api_schedule (void)	1318	api_schedule (void)
920	{	1319	{
921	dTHX;	1320	dTHX;
		1321	struct transfer_args ta;
922		1322
923	SV prev, next;	1323	prepare_schedule (aTHX_ &ta);
924	SV *current = GvSV (coro_current);	1324	TRANSFER (ta);
		1325	}
925		1326
926	for (;;)	1327	static int
927	{	1328	api_cede (void)
928	LOCK;	1329	{
		1330	dTHX;
		1331	struct transfer_args ta;
929		1332
930	next = coro_deq (aTHX_ PRIO_MIN);	1333	prepare_cede (aTHX_ &ta);
931		1334
932	if (next)	1335	if (ta.prev != ta.next)
933	break;
934
935	UNLOCK;
936
937	{	1336	{
938	dSP;	1337	TRANSFER (ta);
939		1338	return 1;
940	ENTER;
941	SAVETMPS;
942
943	PUSHMARK (SP);
944	PUTBACK;
945	call_sv (GvSV (coro_idle), G_DISCARD);
946
947	FREETMPS;
948	LEAVE;
949	}	1339	}
		1340	else
		1341	return 0;
		1342	}
		1343
		1344	static int
		1345	api_cede_notself (void)
		1346	{
		1347	dTHX;
		1348	struct transfer_args ta;
		1349
		1350	if (prepare_cede_notself (aTHX_ &ta))
950	}	1351	{
951		1352	TRANSFER (ta);
952	prev = SvRV (current);	1353	return 1;
953	SvRV (current) = next;	1354	}
954		1355	else
955	/* free this only after the transfer */	1356	return 0;
956	coro_mortal = prev;
957
958	UNLOCK;
959
960	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
962	}	1357	}
963		1358
964	static void	1359	static void
965	api_cede (void)	1360	api_trace (struct coro *coro, int flags)
966	{	1361	{
967	dTHX;	1362	dTHX;
968		1363
969	LOCK;	1364	if (flags & CC_TRACE)
970	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1365	{
971	UNLOCK;	1366	if (!coro->cctx)
		1367	coro->cctx = cctx_new ();
		1368	else if (!(coro->cctx->flags & CC_TRACE))
		1369	croak ("cannot enable tracing on coroutine with custom stack");
972		1370
973	api_schedule ();	1371	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
974	}	1372	}
		1373	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1374	{
		1375	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
975		1376
		1377	if (coro->flags & CF_RUNNING)
		1378	PL_runops = RUNOPS_DEFAULT;
		1379	else
		1380	coro->runops = RUNOPS_DEFAULT;
		1381	}
		1382	}
		1383
976	MODULE = Coro::State PACKAGE = Coro::State	1384	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977		1385
978	PROTOTYPES: DISABLE	1386	PROTOTYPES: DISABLE
979		1387
980	BOOT:	1388	BOOT:
981	{	1389	{
…		…
984	#endif	1392	#endif
985	BOOT_PAGESIZE;	1393	BOOT_PAGESIZE;
986		1394
987	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1395	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
988		1396
		1397	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1400	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1401
989	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1402	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
990	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1403	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
991	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1404	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1405	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1406	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
992	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1407	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1408	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
993		1409
994	main_mainstack = PL_mainstack;	1410	main_mainstack = PL_mainstack;
		1411	main_top_env = PL_top_env;
		1412
		1413	while (main_top_env->je_prev)
		1414	main_top_env = main_top_env->je_prev;
995		1415
996	coroapi.ver = CORO_API_VERSION;	1416	coroapi.ver = CORO_API_VERSION;
997	coroapi.transfer = api_transfer;	1417	coroapi.transfer = api_transfer;
998		1418
999	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1419	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1007	HV *hv;	1427	HV *hv;
1008	int i;	1428	int i;
1009		1429
1010	Newz (0, coro, 1, struct coro);	1430	Newz (0, coro, 1, struct coro);
1011	coro->args = newAV ();	1431	coro->args = newAV ();
		1432	coro->save = CORO_SAVE_DEF;
		1433	coro->flags = CF_NEW;
		1434
		1435	if (coro_first) coro_first->prev = coro;
		1436	coro->next = coro_first;
		1437	coro_first = coro;
		1438
		1439	coro->hv = hv = newHV ();
		1440	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1441	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1012		1442
1013	for (i = 1; i < items; i++)	1443	for (i = 1; i < items; i++)
1014	av_push (coro->args, newSVsv (ST (i)));	1444	av_push (coro->args, newSVsv (ST (i)));
1015
1016	/coro->mainstack = 0; //actual work is done inside transfer /
1017	/coro->stack = 0;/
1018
1019	hv = newHV ();
1020	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1021	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1022	}	1445	}
1023	OUTPUT:	1446	OUTPUT:
1024	RETVAL	1447	RETVAL
1025		1448
		1449	int
		1450	save (SV *coro, int new_save = -1)
		1451	CODE:
		1452	RETVAL = api_save (coro, new_save);
		1453	OUTPUT:
		1454	RETVAL
		1455
		1456	int
		1457	save_also (SV *coro_sv, int save_also)
		1458	CODE:
		1459	{
		1460	struct coro *coro = SvSTATE (coro_sv);
		1461	RETVAL = coro->save;
		1462	coro->save \|= save_also;
		1463	}
		1464	OUTPUT:
		1465	RETVAL
		1466
1026	void	1467	void
1027	transfer(prev, next, flags)	1468	_set_stacklevel (...)
1028	SV *prev	1469	ALIAS:
1029	SV *next	1470	Coro::State::transfer = 1
1030	int flags	1471	Coro::schedule = 2
		1472	Coro::cede = 3
		1473	Coro::cede_notself = 4
1031	CODE:	1474	CODE:
1032	PUTBACK;
1033	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1034	SPAGAIN;
1035
1036	int
1037	prio (Coro::State coro, int newprio = 0)
1038	ALIAS:
1039	nice = 1
1040	CODE:
1041	{	1475	{
1042	RETVAL = coro->prio;	1476	struct transfer_args ta;
1043		1477
1044	if (items > 1)	1478	switch (ix)
1045	{	1479	{
		1480	case 0:
		1481	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1482	ta.next = 0;
		1483	break;
		1484
		1485	case 1:
1046	if (ix)	1486	if (items != 2)
1047	newprio += coro->prio;	1487	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1048		1488
1049	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1489	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1050	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1490	break;
1051		1491
1052	coro->prio = newprio;	1492	case 2:
		1493	prepare_schedule (aTHX_ &ta);
		1494	break;
		1495
		1496	case 3:
		1497	prepare_cede (aTHX_ &ta);
		1498	break;
		1499
		1500	case 4:
		1501	if (!prepare_cede_notself (aTHX_ &ta))
		1502	XSRETURN_EMPTY;
		1503
		1504	break;
1053	}	1505	}
1054	}
1055		1506
1056	void	1507	BARRIER;
1057	_clone_state_from (SV dst, SV src)	1508	TRANSFER (ta);
		1509
		1510	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1511	XSRETURN_YES;
		1512	}
		1513
		1514	bool
		1515	_destroy (SV *coro_sv)
1058	CODE:	1516	CODE:
1059	{	1517	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1060	struct coro *coro_src = SvSTATE (src);	1518	OUTPUT:
1061		1519	RETVAL
1062	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1063
1064	++coro_src->refcnt;
1065	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1066	}
1067		1520
1068	void	1521	void
1069	_exit (code)	1522	_exit (code)
1070	int code	1523	int code
1071	PROTOTYPE: $	1524	PROTOTYPE: $
1072	CODE:	1525	CODE:
1073	_exit (code);	1526	_exit (code);
1074		1527
1075	MODULE = Coro::State PACKAGE = Coro::Cont	1528	int
		1529	cctx_stacksize (int new_stacksize = 0)
		1530	CODE:
		1531	RETVAL = coro_stacksize;
		1532	if (new_stacksize)
		1533	coro_stacksize = new_stacksize;
		1534	OUTPUT:
		1535	RETVAL
		1536
		1537	int
		1538	cctx_count ()
		1539	CODE:
		1540	RETVAL = cctx_count;
		1541	OUTPUT:
		1542	RETVAL
		1543
		1544	int
		1545	cctx_idle ()
		1546	CODE:
		1547	RETVAL = cctx_idle;
		1548	OUTPUT:
		1549	RETVAL
1076		1550
1077	void	1551	void
1078	yield (...)	1552	list ()
1079	PROTOTYPE: @	1553	PPCODE:
		1554	{
		1555	struct coro *coro;
		1556	for (coro = coro_first; coro; coro = coro->next)
		1557	if (coro->hv)
		1558	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1559	}
		1560
		1561	void
		1562	call (Coro::State coro, SV *coderef)
		1563	ALIAS:
		1564	eval = 1
		1565	CODE:
		1566	{
		1567	if (coro->mainstack)
		1568	{
		1569	struct coro temp;
		1570	Zero (&temp, 1, struct coro);
		1571	temp.save = CORO_SAVE_ALL;
		1572
		1573	if (!(coro->flags & CF_RUNNING))
		1574	{
		1575	save_perl (aTHX_ &temp);
		1576	load_perl (aTHX_ coro);
		1577	}
		1578
		1579	{
		1580	dSP;
		1581	ENTER;
		1582	SAVETMPS;
		1583	PUSHMARK (SP);
		1584	PUTBACK;
		1585	if (ix)
		1586	eval_sv (coderef, 0);
		1587	else
		1588	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1589	SPAGAIN;
		1590	FREETMPS;
		1591	LEAVE;
		1592	PUTBACK;
		1593	}
		1594
		1595	if (!(coro->flags & CF_RUNNING))
		1596	{
		1597	save_perl (aTHX_ coro);
		1598	load_perl (aTHX_ &temp);
		1599	}
		1600	}
		1601	}
		1602
		1603	SV *
		1604	is_ready (Coro::State coro)
		1605	PROTOTYPE: $
		1606	ALIAS:
		1607	is_ready = CF_READY
		1608	is_running = CF_RUNNING
		1609	is_new = CF_NEW
		1610	is_destroyed = CF_DESTROYED
		1611	CODE:
		1612	RETVAL = boolSV (coro->flags & ix);
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	void
		1617	api_trace (Coro::State coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1618
		1619	SV *
		1620	has_stack (Coro::State coro)
		1621	PROTOTYPE: $
		1622	CODE:
		1623	RETVAL = boolSV (!!coro->cctx);
		1624	OUTPUT:
		1625	RETVAL
		1626
		1627	int
		1628	is_traced (Coro::State coro)
		1629	PROTOTYPE: $
		1630	CODE:
		1631	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1632	OUTPUT:
		1633	RETVAL
		1634
		1635	IV
		1636	rss (Coro::State coro)
		1637	PROTOTYPE: $
		1638	ALIAS:
		1639	usecount = 1
1080	CODE:	1640	CODE:
1081	{	1641	switch (ix)
1082	SV *yieldstack;	1642	{
1083	SV *sv;	1643	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1084	AV *defav = GvAV (PL_defgv);	1644	case 1: RETVAL = coro->usecount; break;
1085	struct coro prev, next;
1086
1087	yieldstack = *hv_fetch (
1088	(HV *)SvRV (GvSV (coro_current)),
1089	"yieldstack", sizeof ("yieldstack") - 1,
1090	0	1645	}
1091	);	1646	OUTPUT:
		1647	RETVAL
1092		1648
1093	/* set up @_ -- ugly */
1094	av_clear (defav);
1095	av_fill (defav, items - 1);
1096	while (items--)
1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099	sv = av_pop ((AV *)SvRV (yieldstack));
1100	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1101	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1102	SvREFCNT_dec (sv);
1103
1104	coro_state_transfer (aTHX_ prev, next, 0);
1105	}
1106		1649
1107	MODULE = Coro::State PACKAGE = Coro	1650	MODULE = Coro::State PACKAGE = Coro
1108		1651
1109	BOOT:	1652	BOOT:
1110	{	1653	{
1111	int i;	1654	int i;
		1655
		1656	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1657	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1658	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1659
		1660	coro_current = get_sv ("Coro::current", FALSE);
		1661	SvREADONLY_on (coro_current);
1112		1662
1113	coro_stash = gv_stashpv ("Coro", TRUE);	1663	coro_stash = gv_stashpv ("Coro", TRUE);
1114		1664
1115	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1665	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1116	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1666	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1117	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1667	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1118	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1668	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1119	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1669	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1120	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1670	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1121		1671
1122	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1123	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1124
1125	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1672	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1126	coro_ready[i] = newAV ();	1673	coro_ready[i] = newAV ();
1127		1674
1128	{	1675	{
1129	SV *sv = perl_get_sv("Coro::API", 1);	1676	SV *sv = perl_get_sv("Coro::API", 1);
1130		1677
1131	coroapi.schedule = api_schedule;	1678	coroapi.schedule = api_schedule;
		1679	coroapi.save = api_save;
1132	coroapi.cede = api_cede;	1680	coroapi.cede = api_cede;
		1681	coroapi.cede_notself = api_cede_notself;
1133	coroapi.ready = api_ready;	1682	coroapi.ready = api_ready;
		1683	coroapi.is_ready = api_is_ready;
1134	coroapi.nready = &coro_nready;	1684	coroapi.nready = &coro_nready;
1135	coroapi.current = coro_current;	1685	coroapi.current = coro_current;
1136		1686
1137	GCoroAPI = &coroapi;	1687	GCoroAPI = &coroapi;
1138	sv_setiv (sv, (IV)&coroapi);	1688	sv_setiv (sv, (IV)&coroapi);
1139	SvREADONLY_on (sv);	1689	SvREADONLY_on (sv);
1140	}	1690	}
1141	}	1691	}
1142		1692
1143	#if !PERL_MICRO
1144
1145	void	1693	void
1146	ready (self)	1694	_set_current (SV *current)
1147	SV * self
1148	PROTOTYPE: $	1695	PROTOTYPE: $
1149	CODE:	1696	CODE:
1150	api_ready (self);	1697	SvREFCNT_dec (SvRV (coro_current));
		1698	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1151		1699
1152	#endif	1700	int
		1701	prio (Coro::State coro, int newprio = 0)
		1702	ALIAS:
		1703	nice = 1
		1704	CODE:
		1705	{
		1706	RETVAL = coro->prio;
		1707
		1708	if (items > 1)
		1709	{
		1710	if (ix)
		1711	newprio = coro->prio - newprio;
		1712
		1713	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1714	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1715
		1716	coro->prio = newprio;
		1717	}
		1718	}
		1719	OUTPUT:
		1720	RETVAL
		1721
		1722	SV *
		1723	ready (SV *self)
		1724	PROTOTYPE: $
		1725	CODE:
		1726	RETVAL = boolSV (api_ready (self));
		1727	OUTPUT:
		1728	RETVAL
1153		1729
1154	int	1730	int
1155	nready (...)	1731	nready (...)
1156	PROTOTYPE:	1732	PROTOTYPE:
1157	CODE:	1733	CODE:
1158	RETVAL = coro_nready;	1734	RETVAL = coro_nready;
1159	OUTPUT:	1735	OUTPUT:
1160	RETVAL	1736	RETVAL
1161		1737
		1738	# for async_pool speedup
1162	void	1739	void
1163	schedule (...)	1740	_pool_1 (SV *cb)
1164	PROTOTYPE:
1165	CODE:	1741	CODE:
1166	api_schedule ();	1742	{
		1743	int i, len;
		1744	HV hv = (HV )SvRV (coro_current);
		1745	AV *defav = GvAV (PL_defgv);
		1746	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1747	AV *invoke_av;
		1748
		1749	if (!invoke)
		1750	croak ("\3terminate\2\n");
		1751
		1752	hv_store (hv, "desc", sizeof ("desc") - 1,
		1753	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1754
		1755	invoke_av = (AV *)SvRV (invoke);
		1756	len = av_len (invoke_av);
		1757
		1758	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1759
		1760	if (len > 0)
		1761	{
		1762	av_fill (defav, len - 1);
		1763	for (i = 0; i < len; ++i)
		1764	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1765	}
		1766
		1767	SvREFCNT_dec (invoke);
		1768	}
1167		1769
1168	void	1770	void
1169	cede (...)	1771	_pool_2 (SV *cb)
1170	PROTOTYPE:
1171	CODE:	1772	CODE:
1172	api_cede ();	1773	{
		1774	struct coro *coro = SvSTATE (coro_current);
1173		1775
1174	# and these are hacks	1776	sv_setsv (cb, &PL_sv_undef);
		1777
		1778	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1779	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1780	croak ("\3terminate\2\n");
		1781
		1782	av_clear (GvAV (PL_defgv));
		1783	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1784	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1785	coro->save = CORO_SAVE_DEF;
		1786	coro->prio = 0;
		1787
		1788	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1789	api_trace (coro, 0);
		1790
		1791	av_push (av_async_pool, newSVsv (coro_current));
		1792	}
		1793
		1794
		1795	MODULE = Coro::State PACKAGE = Coro::AIO
		1796
1175	SV *	1797	SV *
1176	_aio_get_state ()	1798	_get_state ()
1177	CODE:	1799	CODE:
1178	{	1800	{
1179	struct {	1801	struct io_state *data;
1180	int errorno;
1181	int laststype;
1182	int laststatval;
1183	Stat_t statcache;
1184	} data;
1185		1802
		1803	RETVAL = newSV (sizeof (struct io_state));
		1804	data = (struct io_state *)SvPVX (RETVAL);
		1805	SvCUR_set (RETVAL, sizeof (struct io_state));
		1806	SvPOK_only (RETVAL);
		1807
1186	data.errorno = errno;	1808	data->errorno = errno;
1187	data.laststype = PL_laststype;	1809	data->laststype = PL_laststype;
1188	data.laststatval = PL_laststatval;	1810	data->laststatval = PL_laststatval;
1189	data.statcache = PL_statcache;	1811	data->statcache = PL_statcache;
1190
1191	RETVAL = newSVpvn ((char *)&data, sizeof data);
1192	}	1812	}
1193	OUTPUT:	1813	OUTPUT:
1194	RETVAL	1814	RETVAL
1195		1815
1196	void	1816	void
1197	_aio_set_state (char *data_)	1817	_set_state (char *data_)
1198	PROTOTYPE: $	1818	PROTOTYPE: $
1199	CODE:	1819	CODE:
1200	{	1820	{
1201	struct {	1821	struct io_state data = (void )data_;
1202	int errorno;
1203	int laststype;
1204	int laststatval;
1205	Stat_t statcache;
1206	} data = (void )data_;
1207		1822
1208	errno = data->errorno;	1823	errno = data->errorno;
1209	PL_laststype = data->laststype;	1824	PL_laststype = data->laststype;
1210	PL_laststatval = data->laststatval;	1825	PL_laststatval = data->laststatval;
1211	PL_statcache = data->statcache;	1826	PL_statcache = data->statcache;
1212	}	1827	}
		1828

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Comparing Coro/Coro/State.xs (file contents): Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs. Revision 1.173 by root, Sun Sep 30 13:41:45 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.173 by root, Sun Sep 30 13:41:45 2007 UTC