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Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.107 by root, Mon Nov 27 02:15:51 2006 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "patchlevel.h"	7	#include "patchlevel.h"
6		8
7	#if PATCHLEVEL < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	#define PERL_VERSION_ATLEAST(a,b,c) \
		14	(PERL_REVISION > (a) \
		15	|| (PERL_REVISION == (a) \
		16	&& (PERL_VERSION > (b) \
		17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		18
		19	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
10	# endif	22	# endif
11	# ifndef call_sv	23	# ifndef call_sv
12	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
25	# endif	37	# endif
26	#endif	38	#endif
27		39
28	#include "libcoro/coro.c"
29
30	#include <signal.h>	40	#include <stdio.h>
		41	#include <errno.h>
		42
		43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		44	# undef STACKGUARD
		45	#endif
		46
		47	#ifndef STACKGUARD
		48	# define STACKGUARD 0
		49	#endif
31		50
32	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
33	# include <unistd.h>	52	# include <unistd.h>
34	# include <sys/mman.h>	53	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
38	# else	57	# else
39	# undef HAVE_MMAP	58	# undef HAVE_MMAP
40	# endif	59	# endif
41	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE (void)0
42	#endif	68	# endif
43		69	#else
44	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
45	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
46		73
47	/* The next macro should declare a variable stacklevel that contains and approximation	74	/* The next macro should declare a variable stacklevel that contains and approximation
48	* to the current C stack pointer. Its property is that it changes with each call	75	* to the current C stack pointer. Its property is that it changes with each call
49	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
51		79
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		81
54	#define labs(l) ((l) >= 0 ? (l) : -(l))	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
55		89
56	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
57		93
58	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
59	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
60	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
61	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
62	#else	98	#else
63	# define LOCK 0	99	# define LOCK (void)0
64	# define UNLOCK 0	100	# define UNLOCK (void)0
65	#endif	101	#endif
66		102
67	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
		104	static AV *main_mainstack; /* used to differentiate between $main and others */
		105	static HV *coro_state_stash, *coro_stash;
		106	static SV *coro_mortal; /* will be freed after next transfer */
68		107
69	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
70	typedef struct {	112	typedef struct coro_cctx {
71	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
72	int usecnt; /* shared by how many coroutines */
73	int gencnt; /* generation counter */
74		114
75	coro_context cctx;	115	/* the stack */
76
77	void *sptr;	116	void *sptr;
78	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
79	} coro_stack;
80		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	#if USE_VALGRIND
		125	int valgrind_id;
		126	#endif
		127	} coro_cctx;
		128
		129	/* this is a structure representing a perl-level coroutine */
81	struct coro {	130	struct coro {
82	/* the top-level JMPENV for each coroutine, needed to catch dies. */	131	/* the c coroutine allocated to this perl coroutine, if any */
83	JMPENV start_env;	132	coro_cctx *cctx;
84		133
85	/* the optional C context */	134	/* data associated with this coroutine (initial args) */
86	coro_stack *stack;	135	AV *args;
87	void *cursp;
88	int gencnt;	136	int refcnt;
89		137
90	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
91	AV *defav;	139	AV *defav;
92	SV *defsv;	140	SV *defsv;
93	SV *errsv;	141	SV *errsv;
…		…
102	AV *mainstack;	150	AV *mainstack;
103	SV **stack_sp;	151	SV **stack_sp;
104	OP *op;	152	OP *op;
105	SV **curpad;	153	SV **curpad;
106	AV *comppad;	154	AV *comppad;
		155	CV *compcv;
107	SV **stack_base;	156	SV **stack_base;
108	SV **stack_max;	157	SV **stack_max;
109	SV **tmps_stack;	158	SV **tmps_stack;
110	I32 tmps_floor;	159	I32 tmps_floor;
111	I32 tmps_ix;	160	I32 tmps_ix;
…		…
120	I32 savestack_ix;	169	I32 savestack_ix;
121	I32 savestack_max;	170	I32 savestack_max;
122	OP **retstack;	171	OP **retstack;
123	I32 retstack_ix;	172	I32 retstack_ix;
124	I32 retstack_max;	173	I32 retstack_max;
		174	PMOP *curpm;
125	COP *curcop;	175	COP *curcop;
126	JMPENV *top_env;
127		176
128	/* data associated with this coroutine (initial args) */	177	/* coro process data */
129	AV *args;	178	int prio;
130	};	179	};
131		180
132	typedef struct coro *Coro__State;	181	typedef struct coro *Coro__State;
133	typedef struct coro *Coro__State_or_hashref;	182	typedef struct coro *Coro__State_or_hashref;
134		183
135	static AV *main_mainstack; /* used to differentiate between $main and others */	184	static AV *
136	static HV *coro_state_stash;	185	coro_clone_padlist (CV *cv)
137	static SV *ucoro_state_sv;
138	static U32 ucoro_state_hash;
139	static SV *coro_mortal; /* will be freed after next transfer */
140
141	/* mostly copied from op.c:cv_clone2 */
142	STATIC AV *
143	clone_padlist (AV *protopadlist)
144	{	186	{
145	AV *av;	187	AV *padlist = CvPADLIST (cv);
146	I32 ix;
147	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
148	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
149	SV **pname = AvARRAY (protopad_name);
150	SV **ppad = AvARRAY (protopad);
151	I32 fname = AvFILLp (protopad_name);
152	I32 fpad = AvFILLp (protopad);
153	AV *newpadlist, *newpad_name, *newpad;	188	AV *newpadlist, *newpad;
154	SV **npad;
155
156	newpad_name = newAV ();
157	for (ix = fname; ix >= 0; ix--)
158	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
159
160	newpad = newAV ();
161	av_fill (newpad, AvFILLp (protopad));
162	npad = AvARRAY (newpad);
163		189
164	newpadlist = newAV ();	190	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	191	AvREAL_off (newpadlist);
166	av_store (newpadlist, 0, (SV *) newpad_name);	192	#if PERL_VERSION_ATLEAST (5,9,0)
		193	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		194	#else
		195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		196	#endif
		197	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		198	--AvFILLp (padlist);
		199
		200	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
167	av_store (newpadlist, 1, (SV *) newpad);	201	av_store (newpadlist, 1, (SV *)newpad);
168
169	av = newAV (); /* will be @_ */
170	av_extend (av, 0);
171	av_store (newpad, 0, (SV *) av);
172	AvFLAGS (av) = AVf_REIFY;
173
174	for (ix = fpad; ix > 0; ix--)
175	{
176	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
177
178	if (namesv && namesv != &PL_sv_undef)
179	{
180	char *name = SvPVX (namesv); /* XXX */
181
182	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
183	{ /* lexical from outside? */
184	npad[ix] = SvREFCNT_inc (ppad[ix]);
185	}
186	else
187	{ /* our own lexical */
188	SV *sv;
189	if (*name == '&')
190	sv = SvREFCNT_inc (ppad[ix]);
191	else if (*name == '@')
192	sv = (SV *) newAV ();
193	else if (*name == '%')
194	sv = (SV *) newHV ();
195	else
196	sv = NEWSV (0, 0);
197
198	#ifdef SvPADBUSY
199	if (!SvPADBUSY (sv))
200	#endif
201	SvPADMY_on (sv);
202
203	npad[ix] = sv;
204	}
205	}
206	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
207	{
208	npad[ix] = SvREFCNT_inc (ppad[ix]);
209	}
210	else
211	{
212	SV *sv = NEWSV (0, 0);
213	SvPADTMP_on (sv);
214	npad[ix] = sv;
215	}
216	}
217
218	#if 0 /* return -ENOTUNDERSTOOD */
219	/* Now that vars are all in place, clone nested closures. */
220
221	for (ix = fpad; ix > 0; ix--) {
222	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
223	if (namesv
224	&& namesv != &PL_sv_undef
225	&& !(SvFLAGS(namesv) & SVf_FAKE)
226	&& *SvPVX(namesv) == '&'
227	&& CvCLONE(ppad[ix]))
228	{
229	CV *kid = cv_clone((CV*)ppad[ix]);
230	SvREFCNT_dec(ppad[ix]);
231	CvCLONE_on(kid);
232	SvPADMY_on(kid);
233	npad[ix] = (SV*)kid;
234	}
235	}
236	#endif
237		202
238	return newpadlist;	203	return newpadlist;
239	}	204	}
240		205
241	STATIC void	206	static void
242	free_padlist (AV *padlist)	207	free_padlist (AV *padlist)
243	{	208	{
244	/* may be during global destruction */	209	/* may be during global destruction */
245	if (SvREFCNT (padlist))	210	if (SvREFCNT (padlist))
246	{	211	{
…		…
260		225
261	SvREFCNT_dec ((SV*)padlist);	226	SvREFCNT_dec ((SV*)padlist);
262	}	227	}
263	}	228	}
264		229
265	STATIC int	230	static int
266	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	231	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267	{	232	{
268	AV *padlist;	233	AV *padlist;
269	AV *av = (AV *)mg->mg_obj;	234	AV *av = (AV *)mg->mg_obj;
270		235
271	/* casting is fun. */	236	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	237	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (padlist);	238	free_padlist (padlist);
		239
		240	SvREFCNT_dec (av);
		241
		242	return 0;
274	}	243	}
275		244
276	#define PERL_MAGIC_coro PERL_MAGIC_ext	245	#define PERL_MAGIC_coro PERL_MAGIC_ext
277		246
278	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	247	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
279		248
280	/* the next two functions merely cache the padlists */	249	/* the next two functions merely cache the padlists */
281	STATIC void	250	static void
282	get_padlist (CV *cv)	251	get_padlist (CV *cv)
283	{	252	{
284	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
285		254
286	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	255	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
287	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	256	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
288	else	257	else
		258	{
		259	#if 0
		260	/* this is probably cleaner, but also slower? */
		261	CV *cp = Perl_cv_clone (cv);
		262	CvPADLIST (cv) = CvPADLIST (cp);
		263	CvPADLIST (cp) = 0;
		264	SvREFCNT_dec (cp);
		265	#else
289	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	266	CvPADLIST (cv) = coro_clone_padlist (cv);
		267	#endif
		268	}
290	}	269	}
291		270
292	STATIC void	271	static void
293	put_padlist (CV *cv)	272	put_padlist (CV *cv)
294	{	273	{
295	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	274	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
296		275
297	if (!mg)	276	if (!mg)
…		…
306	}	285	}
307		286
308	#define SB do {	287	#define SB do {
309	#define SE } while (0)	288	#define SE } while (0)
310		289
311	#define LOAD(state) load_state(aTHX_ (state));	290	#define LOAD(state) load_state((state));
312	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	291	#define SAVE(state,flags) save_state((state),(flags));
313		292
314	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
315		294
316	static void	295	static void
317	load_state(pTHX_ Coro__State c)	296	load_state(Coro__State c)
318	{	297	{
319	PL_dowarn = c->dowarn;	298	PL_dowarn = c->dowarn;
320	PL_in_eval = c->in_eval;	299	PL_in_eval = c->in_eval;
321		300
322	PL_curstackinfo = c->curstackinfo;	301	PL_curstackinfo = c->curstackinfo;
…		…
324	PL_mainstack = c->mainstack;	303	PL_mainstack = c->mainstack;
325	PL_stack_sp = c->stack_sp;	304	PL_stack_sp = c->stack_sp;
326	PL_op = c->op;	305	PL_op = c->op;
327	PL_curpad = c->curpad;	306	PL_curpad = c->curpad;
328	PL_comppad = c->comppad;	307	PL_comppad = c->comppad;
		308	PL_compcv = c->compcv;
329	PL_stack_base = c->stack_base;	309	PL_stack_base = c->stack_base;
330	PL_stack_max = c->stack_max;	310	PL_stack_max = c->stack_max;
331	PL_tmps_stack = c->tmps_stack;	311	PL_tmps_stack = c->tmps_stack;
332	PL_tmps_floor = c->tmps_floor;	312	PL_tmps_floor = c->tmps_floor;
333	PL_tmps_ix = c->tmps_ix;	313	PL_tmps_ix = c->tmps_ix;
…		…
339	PL_scopestack_ix = c->scopestack_ix;	319	PL_scopestack_ix = c->scopestack_ix;
340	PL_scopestack_max = c->scopestack_max;	320	PL_scopestack_max = c->scopestack_max;
341	PL_savestack = c->savestack;	321	PL_savestack = c->savestack;
342	PL_savestack_ix = c->savestack_ix;	322	PL_savestack_ix = c->savestack_ix;
343	PL_savestack_max = c->savestack_max;	323	PL_savestack_max = c->savestack_max;
		324	#if !PERL_VERSION_ATLEAST (5,9,0)
344	PL_retstack = c->retstack;	325	PL_retstack = c->retstack;
345	PL_retstack_ix = c->retstack_ix;	326	PL_retstack_ix = c->retstack_ix;
346	PL_retstack_max = c->retstack_max;	327	PL_retstack_max = c->retstack_max;
		328	#endif
		329	PL_curpm = c->curpm;
347	PL_curcop = c->curcop;	330	PL_curcop = c->curcop;
348	PL_top_env = c->top_env;
349		331
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	332	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	333	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	334	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
353		335
…		…
372	PUTBACK;	354	PUTBACK;
373	}	355	}
374	}	356	}
375		357
376	static void	358	static void
377	save_state(pTHX_ Coro__State c, int flags)	359	save_state(Coro__State c, int flags)
378	{	360	{
379	{	361	{
380	dSP;	362	dSP;
381	I32 cxix = cxstack_ix;	363	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	364	PERL_CONTEXT *ccstk = cxstack;
…		…
410	}	392	}
411		393
412	PUSHs ((SV *)CvPADLIST(cv));	394	PUSHs ((SV *)CvPADLIST(cv));
413	PUSHs ((SV *)cv);	395	PUSHs ((SV *)cv);
414		396
415	get_padlist (cv); /* this is a monster */	397	get_padlist (cv);
416	}	398	}
417	}	399	}
418	#ifdef CXt_FORMAT	400	#ifdef CXt_FORMAT
419	else if (CxTYPE(cx) == CXt_FORMAT)	401	else if (CxTYPE(cx) == CXt_FORMAT)
420	{	402	{
…		…
448	c->mainstack = PL_mainstack;	430	c->mainstack = PL_mainstack;
449	c->stack_sp = PL_stack_sp;	431	c->stack_sp = PL_stack_sp;
450	c->op = PL_op;	432	c->op = PL_op;
451	c->curpad = PL_curpad;	433	c->curpad = PL_curpad;
452	c->comppad = PL_comppad;	434	c->comppad = PL_comppad;
		435	c->compcv = PL_compcv;
453	c->stack_base = PL_stack_base;	436	c->stack_base = PL_stack_base;
454	c->stack_max = PL_stack_max;	437	c->stack_max = PL_stack_max;
455	c->tmps_stack = PL_tmps_stack;	438	c->tmps_stack = PL_tmps_stack;
456	c->tmps_floor = PL_tmps_floor;	439	c->tmps_floor = PL_tmps_floor;
457	c->tmps_ix = PL_tmps_ix;	440	c->tmps_ix = PL_tmps_ix;
…		…
463	c->scopestack_ix = PL_scopestack_ix;	446	c->scopestack_ix = PL_scopestack_ix;
464	c->scopestack_max = PL_scopestack_max;	447	c->scopestack_max = PL_scopestack_max;
465	c->savestack = PL_savestack;	448	c->savestack = PL_savestack;
466	c->savestack_ix = PL_savestack_ix;	449	c->savestack_ix = PL_savestack_ix;
467	c->savestack_max = PL_savestack_max;	450	c->savestack_max = PL_savestack_max;
		451	#if !PERL_VERSION_ATLEAST (5,9,0)
468	c->retstack = PL_retstack;	452	c->retstack = PL_retstack;
469	c->retstack_ix = PL_retstack_ix;	453	c->retstack_ix = PL_retstack_ix;
470	c->retstack_max = PL_retstack_max;	454	c->retstack_max = PL_retstack_max;
		455	#endif
		456	c->curpm = PL_curpm;
471	c->curcop = PL_curcop;	457	c->curcop = PL_curcop;
472	c->top_env = PL_top_env;
473	}	458	}
474		459
475	/*	460	/*
476	* allocate various perl stacks. This is an exact copy	461	* allocate various perl stacks. This is an exact copy
477	* of perl.c:init_stacks, except that it uses less memory	462	* of perl.c:init_stacks, except that it uses less memory
478	* on the (sometimes correct) assumption that coroutines do	463	* on the (sometimes correct) assumption that coroutines do
479	* not usually need a lot of stackspace.	464	* not usually need a lot of stackspace.
480	*/	465	*/
481	STATIC void	466	static void
482	coro_init_stacks (pTHX)	467	coro_init_stacks ()
483	{	468	{
484	LOCK;
485
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487	PL_curstackinfo->si_type = PERLSI_MAIN;	470	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	471	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		473
…		…
511		494
512	New(54,PL_savestack,96,ANY);	495	New(54,PL_savestack,96,ANY);
513	PL_savestack_ix = 0;	496	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	497	PL_savestack_max = 96;
515		498
		499	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	500	New(54,PL_retstack,8,OP*);
517	PL_retstack_ix = 0;	501	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	502	PL_retstack_max = 8;
519		503	#endif
520	UNLOCK;
521	}	504	}
522		505
523	/*	506	/*
524	* destroy the stacks, the callchain etc...	507	* destroy the stacks, the callchain etc...
525	*/	508	*/
526	STATIC void	509	static void
527	destroy_stacks(pTHX)	510	coro_destroy_stacks ()
528	{	511	{
529	if (!IN_DESTRUCT)	512	if (!IN_DESTRUCT)
530	{	513	{
531	/* is this ugly, I ask? */	514	/* is this ugly, I ask? */
532	LEAVE_SCOPE (0);	515	LEAVE_SCOPE (0);
533		516
534	/* sure it is, but more important: is it correct?? :/ */	517	/* sure it is, but more important: is it correct?? :/ */
535	FREETMPS;	518	FREETMPS;
		519
		520	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
536	}	521	}
537		522
538	while (PL_curstackinfo->si_next)	523	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	524	PL_curstackinfo = PL_curstackinfo->si_next;
540		525
541	while (PL_curstackinfo)	526	while (PL_curstackinfo)
542	{	527	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	528	PERL_SI *p = PL_curstackinfo->si_prev;
544		529
545	{	530	{ /*D*//*remove*/
546	dSP;	531	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	532	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */	533	PUTBACK; /* possibly superfluous */
549	}	534	}
550		535
551	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
552	{	537	{
553	dounwind(-1);	538	dounwind (-1);/*D*//*remove*/
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	539	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}	540	}
556		541
557	Safefree(PL_curstackinfo->si_cxstack);	542	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	543	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	544	PL_curstackinfo = p;
560	}	545	}
561		546
562	Safefree(PL_tmps_stack);	547	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	548	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	549	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	550	Safefree (PL_savestack);
		551	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	552	Safefree (PL_retstack);
567	}
568
569	static void
570	allocate_stack (Coro__State ctx, int alloc)
571	{
572	coro_stack *stack;
573
574	New (0, stack, 1, coro_stack);
575
576	stack->refcnt = 1;
577	stack->usecnt = 1;
578	stack->gencnt = ctx->gencnt = 0;
579
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif	553	#endif
587	{
588	/*FIXME*//*D*//* reasonable stack size! */
589	stack->ssize = - (8192 * sizeof (long));
590	New (0, stack->sptr, 8192, long);
591	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}	554	}
598		555
599	static void	556	static void
600	deallocate_stack (Coro__State ctx)	557	setup_coro (struct coro *coro)
601	{
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#endif
615	Safefree (stack->sptr);
616
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623
624	static void
625	setup_coro (void *arg)
626	{	558	{
627	/*	559	/*
628	* emulate part of the perl startup here.	560	* emulate part of the perl startup here.
629	*/	561	*/
630	dSP;
631	Coro__State ctx = (Coro__State)arg;
632	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
633		562
634	coro_init_stacks (aTHX);	563	coro_init_stacks ();
		564
635	/*PL_curcop = 0;*/	565	PL_curcop = 0;
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */	566	PL_in_eval = 0;
		567	PL_curpm = 0;
		568
		569	{
		570	dSP;
		571	LOGOP myop;
		572
		573	/* I have no idea why this is needed, but it is */
		574	PUSHMARK (SP);
		575
637	SvREFCNT_dec (GvAV (PL_defgv));	576	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	577	GvAV (PL_defgv) = coro->args; coro->args = 0;
639		578
640	SPAGAIN;
641
642	if (ctx->stack)
643	{
644	ctx->cursp = 0;
645
646	PUSHMARK(SP);
647	PUTBACK;
648	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649
650	if (SvTRUE (ERRSV))
651	croak (NULL);
652	else
653	croak ("FATAL: CCTXT coroutine returned!");
654	}
655	else
656	{
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);	579	Zero (&myop, 1, LOGOP);
662	myop.op_next = Nullop;	580	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;	581	myop.op_flags = OPf_WANT_VOID;
664		582
		583	PL_op = (OP *)&myop;
		584
665	PUSHMARK(SP);	585	PUSHMARK (SP);
666	XPUSHs (sub_init);	586	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;	587	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	588	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;	589	SPAGAIN;
677		590
678	ENTER; /* necessary e.g. for dounwind */	591	ENTER; /* necessary e.g. for dounwind */
679	}	592	}
680	}	593	}
681		594
682	static void	595	static void
683	continue_coro (void *arg)	596	free_coro_mortal ()
684	{	597	{
685	/*
686	* this is a _very_ stripped down perl interpreter ;)
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;
692
693	ctx->cursp = 0;
694	PL_op = PL_op->op_next;
695	CALLRUNOPS(aTHX);
696
697	abort ();
698	}
699
700	STATIC void
701	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
702	{
703	dSTACKLEVEL;
704
705	if (prev != next)
706	{
707	if (next->mainstack)
708	{
709	LOCK;
710	SAVE (prev, flags);
711	LOAD (next);
712	UNLOCK;
713
714	/* mark this state as in-use */
715	next->mainstack = 0;
716	next->tmps_ix = -2;
717
718	/* stacklevel changed? if yes, grab the stack for us! */
719	if (flags & TRANSFER_SAVE_CCTXT)
720	{
721	if (!prev->stack)
722	allocate_stack (prev, 0);
723	else if (prev->cursp != stacklevel
724	&& prev->stack->usecnt > 1)
725	{
726	prev->gencnt = ++prev->stack->gencnt;
727	prev->stack->usecnt = 1;
728	}
729
730	/* has our stack been invalidated? */
731	if (next->stack && next->stack->gencnt != next->gencnt)
732	{
733	deallocate_stack (next);
734	allocate_stack (next, 1);
735	coro_create (&(next->stack->cctx),
736	continue_coro, (void *)next,
737	next->stack->sptr, labs (next->stack->ssize));
738	}
739
740	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741	prev->cursp = stacklevel;
742	/* don't add any code here */
743	}
744	else
745	next->cursp = stacklevel;
746	}
747	else if (next->tmps_ix == -2)
748	croak ("tried to transfer to running coroutine");
749	else
750	{
751	LOCK;
752	SAVE (prev, -1); /* first get rid of the old state */
753	UNLOCK;
754
755	if (flags & TRANSFER_SAVE_CCTXT)
756	{
757	if (!prev->stack)
758	allocate_stack (prev, 0);
759
760	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
761	{
762	PL_top_env = &next->start_env;
763
764	setup_coro (next);
765	next->cursp = stacklevel;
766
767	prev->stack->refcnt++;
768	prev->stack->usecnt++;
769	next->stack = prev->stack;
770	next->gencnt = prev->gencnt;
771	}
772	else
773	{
774	assert (!next->stack);
775	allocate_stack (next, 1);
776	coro_create (&(next->stack->cctx),
777	setup_coro, (void *)next,
778	next->stack->sptr, labs (next->stack->ssize));
779	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
780	prev->cursp = stacklevel;
781	/* don't add any code here */
782	}
783	}
784	else
785	{
786	setup_coro (next);
787	next->cursp = stacklevel;
788	}
789	}
790	}
791
792	LOCK;
793	if (coro_mortal)	598	if (coro_mortal)
794	{	599	{
795	SvREFCNT_dec (coro_mortal);	600	SvREFCNT_dec (coro_mortal);
796	coro_mortal = 0;	601	coro_mortal = 0;
797	}	602	}
		603	}
		604
		605	static void NOINLINE
		606	prepare_cctx (coro_cctx *cctx)
		607	{
		608	dSP;
		609	LOGOP myop;
		610
		611	Zero (&myop, 1, LOGOP);
		612	myop.op_next = PL_op;
		613	myop.op_flags = OPf_WANT_VOID;
		614
		615	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		616
		617	PUSHMARK (SP);
		618	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		619	PUTBACK;
		620	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		621	SPAGAIN;
		622	}
		623
		624	static void
		625	coro_run (void *arg)
		626	{
		627	/* coro_run is the alternative epilogue of transfer() */
798	UNLOCK;	628	UNLOCK;
799	}
800		629
801	#define SV_CORO(sv,func) \	630	/*
802	do { \	631	* this is a _very_ stripped down perl interpreter ;)
803	if (SvROK (sv)) \	632	*/
804	sv = SvRV (sv); \	633	PL_top_env = &PL_start_env;
805	\
806	if (SvTYPE (sv) == SVt_PVHV) \
807	{ \
808	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
809	\
810	if (!he) \
811	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
812	\
813	(sv) = SvRV (HeVAL(he)); \
814	} \
815	\
816	/* must also be changed inside Coro::Cont::yield */ \
817	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
818	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
819	\
820	} while(0)
821		634
822	#define SvSTATE(sv) (struct coro *)SvIV (sv)	635	/* inject call to cctx_init */
		636	prepare_cctx ((coro_cctx *)arg);
823		637
		638	/* somebody will hit me for both perl_run and PL_restartop */
		639	perl_run (PL_curinterp);
		640
		641	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		642	abort ();
		643	}
		644
		645	static coro_cctx *
		646	cctx_new ()
		647	{
		648	coro_cctx *cctx;
		649
		650	++cctx_count;
		651
		652	New (0, cctx, 1, coro_cctx);
		653
		654	#if HAVE_MMAP
		655
		656	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		657	/* mmap suppsedly does allocate-on-write for us */
		658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		659
		660	if (cctx->sptr == (void *)-1)
		661	{
		662	perror ("FATAL: unable to mmap stack for coroutine");
		663	_exit (EXIT_FAILURE);
		664	}
		665
		666	# if STACKGUARD
		667	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		668	# endif
		669
		670	#else
		671
		672	cctx->ssize = STACKSIZE * (long)sizeof (long);
		673	New (0, cctx->sptr, STACKSIZE, long);
		674
		675	if (!cctx->sptr)
		676	{
		677	perror ("FATAL: unable to malloc stack for coroutine");
		678	_exit (EXIT_FAILURE);
		679	}
		680
		681	#endif
		682
		683	#if USE_VALGRIND
		684	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		685	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		686	cctx->ssize + (char *)cctx->sptr
		687	);
		688	#endif
		689
		690	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		691
		692	return cctx;
		693	}
		694
		695	static void
		696	cctx_free (coro_cctx *cctx)
		697	{
		698	if (!cctx)
		699	return;
		700
		701	--cctx_count;
		702
		703	#if USE_VALGRIND
		704	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		705	#endif
		706
		707	#if HAVE_MMAP
		708	munmap (cctx->sptr, cctx->ssize);
		709	#else
		710	Safefree (cctx->sptr);
		711	#endif
		712
		713	Safefree (cctx);
		714	}
		715
		716	static coro_cctx *
		717	cctx_get ()
		718	{
		719	coro_cctx *cctx;
		720
		721	if (cctx_first)
		722	{
		723	--cctx_idle;
		724	cctx = cctx_first;
		725	cctx_first = cctx->next;
		726	}
		727	else
		728	{
		729	cctx = cctx_new ();
		730	PL_op = PL_op->op_next;
		731	}
		732
		733	return cctx;
		734	}
		735
		736	static void
		737	cctx_put (coro_cctx *cctx)
		738	{
		739	++cctx_idle;
		740	cctx->next = cctx_first;
		741	cctx_first = cctx;
		742	}
		743
		744	/* never call directly, always through the coro_state_transfer global variable */
		745	static void NOINLINE
		746	transfer (struct coro *prev, struct coro *next, int flags)
		747	{
		748	dSTACKLEVEL;
		749
		750	/* sometimes transfer is only called to set idle_sp */
		751	if (flags == TRANSFER_SET_STACKLEVEL)
		752	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		753	else if (prev != next)
		754	{
		755	coro_cctx *prev__cctx;
		756
		757	LOCK;
		758
		759	if (next->mainstack)
		760	{
		761	/* coroutine already started */
		762	SAVE (prev, flags);
		763	LOAD (next);
		764	}
		765	else
		766	{
		767	/* need to start coroutine */
		768	/* first get rid of the old state */
		769	SAVE (prev, -1);
		770	/* setup coroutine call */
		771	setup_coro (next);
		772	/* need a stack */
		773	next->cctx = 0;
		774	}
		775
		776	if (!prev->cctx)
		777	/* create a new empty context */
		778	Newz (0, prev->cctx, 1, coro_cctx);
		779
		780	prev__cctx = prev->cctx;
		781
		782	/* possibly "free" the cctx */
		783	if (prev__cctx->idle_sp == STACKLEVEL)
		784	{
		785	cctx_put (prev__cctx);
		786	prev->cctx = 0;
		787	}
		788
		789	if (!next->cctx)
		790	next->cctx = cctx_get ();
		791
		792	if (prev__cctx != next->cctx)
		793	{
		794	prev__cctx->top_env = PL_top_env;
		795	PL_top_env = next->cctx->top_env;
		796	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		797	}
		798
		799	free_coro_mortal ();
		800
		801	UNLOCK;
		802	}
		803	}
		804
		805	struct transfer_args
		806	{
		807	struct coro *prev, *next;
		808	int flags;
		809	};
		810
		811	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		812
		813	static void
		814	coro_state_destroy (struct coro *coro)
		815	{
		816	if (coro->refcnt--)
		817	return;
		818
		819	if (coro->mainstack && coro->mainstack != main_mainstack)
		820	{
		821	struct coro temp;
		822
		823	SAVE ((&temp), TRANSFER_SAVE_ALL);
		824	LOAD (coro);
		825
		826	coro_destroy_stacks ();
		827
		828	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		829
		830	coro->mainstack = 0;
		831	}
		832
		833	cctx_free (coro->cctx);
		834	SvREFCNT_dec (coro->args);
		835	Safefree (coro);
		836	}
		837
824	static void	838	static int
		839	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		840	{
		841	struct coro *coro = (struct coro *)mg->mg_ptr;
		842	mg->mg_ptr = 0;
		843
		844	coro_state_destroy (coro);
		845
		846	return 0;
		847	}
		848
		849	static int
		850	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		851	{
		852	struct coro *coro = (struct coro *)mg->mg_ptr;
		853
		854	++coro->refcnt;
		855
		856	return 0;
		857	}
		858
		859	static MGVTBL coro_state_vtbl = {
		860	0, 0, 0, 0,
		861	coro_state_clear,
		862	0,
		863	#ifdef MGf_DUP
		864	coro_state_dup,
		865	#else
		866	# define MGf_DUP 0
		867	#endif
		868	};
		869
		870	static struct coro *
		871	SvSTATE (SV *coro)
		872	{
		873	HV *stash;
		874	MAGIC *mg;
		875
		876	if (SvROK (coro))
		877	coro = SvRV (coro);
		878
		879	stash = SvSTASH (coro);
		880	if (stash != coro_stash && stash != coro_state_stash)
		881	{
		882	/* very slow, but rare, check */
		883	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		884	croak ("Coro::State object required");
		885	}
		886
		887	mg = SvMAGIC (coro);
		888	assert (mg->mg_type == PERL_MAGIC_ext);
		889	return (struct coro *)mg->mg_ptr;
		890	}
		891
		892	static void
		893	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		894	{
		895	ta->prev = SvSTATE (prev);
		896	ta->next = SvSTATE (next);
		897	ta->flags = flags;
		898	}
		899
		900	static void
825	api_transfer(pTHX_ SV *prev, SV *next, int flags)	901	api_transfer (SV *prev, SV *next, int flags)
826	{	902	{
827	SV_CORO (prev, "Coro::transfer");	903	dTHX;
828	SV_CORO (next, "Coro::transfer");	904	struct transfer_args ta;
829		905
830	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	906	prepare_transfer (&ta, prev, next, flags);
		907	TRANSFER (ta);
831	}	908	}
832		909
833	/** Coro ********************************************************************/	910	/** Coro ********************************************************************/
834		911
835	#define PRIO_MAX 3	912	#define PRIO_MAX 3
…		…
839	#define PRIO_IDLE -3	916	#define PRIO_IDLE -3
840	#define PRIO_MIN -4	917	#define PRIO_MIN -4
841		918
842	/* for Coro.pm */	919	/* for Coro.pm */
843	static GV *coro_current, *coro_idle;	920	static GV *coro_current, *coro_idle;
844	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
845	static int coro_nready;	922	static int coro_nready;
846		923
847	static void	924	static void
848	coro_enq (SV *sv)	925	coro_enq (SV *sv)
849	{	926	{
		927	int prio;
		928
850	if (SvTYPE (sv) == SVt_PVHV)	929	if (SvTYPE (sv) != SVt_PVHV)
851	{
852	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
853	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
854
855	prio = prio > PRIO_MAX ? PRIO_MAX
856	: prio < PRIO_MIN ? PRIO_MIN
857	: prio;
858
859	av_push (coro_ready [prio - PRIO_MIN], sv);
860	coro_nready++;
861
862	return;
863	}
864
865	croak ("Coro::ready tried to enqueue something that is not a coroutine");	930	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		931
		932	prio = SvSTATE (sv)->prio;
		933
		934	av_push (coro_ready [prio - PRIO_MIN], sv);
		935	coro_nready++;
866	}	936	}
867		937
868	static SV *	938	static SV *
869	coro_deq (int min_prio)	939	coro_deq (int min_prio)
870	{	940	{
…		…
873	min_prio -= PRIO_MIN;	943	min_prio -= PRIO_MIN;
874	if (min_prio < 0)	944	if (min_prio < 0)
875	min_prio = 0;	945	min_prio = 0;
876		946
877	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	947	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
878	if (av_len (coro_ready[prio]) >= 0)	948	if (AvFILLp (coro_ready [prio]) >= 0)
879	{	949	{
880	coro_nready--;	950	coro_nready--;
881	return av_shift (coro_ready[prio]);	951	return av_shift (coro_ready [prio]);
882	}	952	}
883		953
884	return 0;	954	return 0;
885	}	955	}
886		956
887	static void	957	static void
888	api_ready (SV *coro)	958	api_ready (SV *coro)
889	{	959	{
		960	dTHX;
		961
890	if (SvROK (coro))	962	if (SvROK (coro))
891	coro = SvRV (coro);	963	coro = SvRV (coro);
892		964
893	LOCK;	965	LOCK;
894	coro_enq (SvREFCNT_inc (coro));	966	coro_enq (SvREFCNT_inc (coro));
895	UNLOCK;	967	UNLOCK;
896	}	968	}
897		969
898	static void	970	static void
899	api_schedule (void)	971	prepare_schedule (struct transfer_args *ta)
900	{	972	{
901	SV *prev, *next;	973	SV *current, *prev, *next;
902		974
		975	current = GvSV (coro_current);
		976
		977	for (;;)
		978	{
		979	LOCK;
		980	next = coro_deq (PRIO_MIN);
		981	UNLOCK;
		982
		983	if (next)
		984	break;
		985
		986	{
		987	dSP;
		988
		989	ENTER;
		990	SAVETMPS;
		991
		992	PUSHMARK (SP);
		993	PUTBACK;
		994	call_sv (GvSV (coro_idle), G_DISCARD);
		995
		996	FREETMPS;
		997	LEAVE;
		998	}
		999	}
		1000
		1001	prev = SvRV (current);
		1002	SvRV (current) = next;
		1003
		1004	/* free this only after the transfer */
903	LOCK;	1005	LOCK;
904		1006	free_coro_mortal ();
905	prev = SvRV (GvSV (coro_current));	1007	UNLOCK;
906	next = coro_deq (PRIO_MIN);
907
908	if (!next)
909	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
910
911	/* free this only after the transfer */
912	coro_mortal = prev;	1008	coro_mortal = prev;
913	SV_CORO (prev, "Coro::schedule");
914		1009
915	SvRV (GvSV (coro_current)) = next;	1010	ta->prev = SvSTATE (prev);
916		1011	ta->next = SvSTATE (next);
917	SV_CORO (next, "Coro::schedule");	1012	ta->flags = TRANSFER_SAVE_ALL;
918
919	UNLOCK;
920
921	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
922	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
923	}	1013	}
924		1014
925	static void	1015	static void
926	api_cede (void)	1016	prepare_cede (struct transfer_args *ta)
927	{	1017	{
928	LOCK;	1018	LOCK;
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1019	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930	UNLOCK;	1020	UNLOCK;
931		1021
		1022	prepare_schedule (ta);
		1023	}
		1024
		1025	static void
932	api_schedule ();	1026	api_schedule (void)
		1027	{
		1028	dTHX;
		1029	struct transfer_args ta;
		1030
		1031	prepare_schedule (&ta);
		1032	TRANSFER (ta);
		1033	}
		1034
		1035	static void
		1036	api_cede (void)
		1037	{
		1038	dTHX;
		1039	struct transfer_args ta;
		1040
		1041	prepare_cede (&ta);
		1042	TRANSFER (ta);
933	}	1043	}
934		1044
935	MODULE = Coro::State PACKAGE = Coro::State	1045	MODULE = Coro::State PACKAGE = Coro::State
936		1046
937	PROTOTYPES: ENABLE	1047	PROTOTYPES: DISABLE
938		1048
939	BOOT:	1049	BOOT:
940	{ /* {} necessary for stoopid perl-5.6.x */	1050	{
941	#ifdef USE_ITHREADS	1051	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1052	MUTEX_INIT (&coro_mutex);
943	#endif	1053	#endif
		1054	BOOT_PAGESIZE;
944		1055
945	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
946	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
947	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1056	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
948		1057
949	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1058	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
950	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1059	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
951	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1060	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
952	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
953		1061
954	main_mainstack = PL_mainstack;	1062	main_mainstack = PL_mainstack;
955		1063
956	coroapi.ver = CORO_API_VERSION;	1064	coroapi.ver = CORO_API_VERSION;
957	coroapi.transfer = api_transfer;	1065	coroapi.transfer = api_transfer;
958	}
959		1066
960	Coro::State	1067	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	_newprocess(args)	1068	}
962	SV * args	1069
963	PROTOTYPE: $	1070	SV *
		1071	new (char *klass, ...)
964	CODE:	1072	CODE:
965	Coro__State coro;	1073	{
		1074	struct coro *coro;
		1075	HV *hv;
		1076	int i;
966		1077
967	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
968	croak ("Coro::State::_newprocess expects an arrayref");
969
970	Newz (0, coro, 1, struct coro);	1078	Newz (0, coro, 1, struct coro);
		1079	coro->args = newAV ();
971		1080
972	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1081	hv = newHV ();
973	coro->mainstack = 0; /* actual work is done inside transfer */	1082	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
974	coro->stack = 0;	1083	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
975		1084
976	/* same as JMPENV_BOOTSTRAP */	1085	for (i = 1; i < items; i++)
977	/* we might be able to recycle start_env, but safe is safe */	1086	av_push (coro->args, newSVsv (ST (i)));
978	//Zero(&coro->start_env, 1, JMPENV);	1087	}
979	coro->start_env.je_ret = -1;
980	coro->start_env.je_mustcatch = TRUE;
981
982	RETVAL = coro;
983	OUTPUT:	1088	OUTPUT:
984	RETVAL	1089	RETVAL
985		1090
986	void	1091	void
987	transfer(prev, next, flags)	1092	_set_stacklevel (...)
988	SV *prev	1093	ALIAS:
989	SV *next	1094	Coro::State::transfer = 1
990	int flags	1095	Coro::schedule = 2
991	PROTOTYPE: @	1096	Coro::cede = 3
		1097	Coro::Cont::yield = 4
992	CODE:	1098	CODE:
993	PUTBACK;	1099	{
994	SV_CORO (next, "Coro::transfer");	1100	struct transfer_args ta;
995	SV_CORO (prev, "Coro::transfer");	1101
996	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1102	switch (ix)
997	SPAGAIN;	1103	{
		1104	case 0:
		1105	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1106	ta.next = 0;
		1107	ta.flags = TRANSFER_SET_STACKLEVEL;
		1108	break;
		1109
		1110	case 1:
		1111	if (items != 3)
		1112	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1113
		1114	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1115	break;
		1116
		1117	case 2:
		1118	prepare_schedule (&ta);
		1119	break;
		1120
		1121	case 3:
		1122	prepare_cede (&ta);
		1123	break;
		1124
		1125	case 4:
		1126	{
		1127	SV *yieldstack;
		1128	SV *sv;
		1129	AV *defav = GvAV (PL_defgv);
		1130
		1131	yieldstack = *hv_fetch (
		1132	(HV *)SvRV (GvSV (coro_current)),
		1133	"yieldstack", sizeof ("yieldstack") - 1,
		1134	0
		1135	);
		1136
		1137	/* set up @_ -- ugly */
		1138	av_clear (defav);
		1139	av_fill (defav, items - 1);
		1140	while (items--)
		1141	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1142
		1143	sv = av_pop ((AV *)SvRV (yieldstack));
		1144	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1145	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1146	ta.flags = 0;
		1147	SvREFCNT_dec (sv);
		1148	}
		1149	break;
		1150
		1151	}
		1152
		1153	TRANSFER (ta);
		1154	}
998		1155
999	void	1156	void
1000	DESTROY(coro)	1157	_clone_state_from (SV *dst, SV *src)
1001	Coro::State coro	1158	CODE:
1002	CODE:	1159	{
		1160	struct coro *coro_src = SvSTATE (src);
1003		1161
1004	if (coro->mainstack && coro->mainstack != main_mainstack)	1162	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1005	{
1006	struct coro temp;
1007		1163
1008	PUTBACK;	1164	++coro_src->refcnt;
1009	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1165	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1010	LOAD(aTHX_ coro);	1166	}
1011	SPAGAIN;
1012
1013	destroy_stacks (aTHX);
1014
1015	LOAD((&temp)); /* this will get rid of defsv etc.. */
1016	SPAGAIN;
1017
1018	coro->mainstack = 0;
1019	}
1020
1021	deallocate_stack (coro);
1022	SvREFCNT_dec (coro->args);
1023	Safefree (coro);
1024		1167
1025	void	1168	void
1026	_exit(code)	1169	_exit (code)
1027	int code	1170	int code
1028	PROTOTYPE: $	1171	PROTOTYPE: $
1029	CODE:	1172	CODE:
1030	_exit (code);	1173	_exit (code);
1031		1174
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1175	int
		1176	cctx_count ()
		1177	CODE:
		1178	RETVAL = cctx_count;
		1179	OUTPUT:
		1180	RETVAL
1033		1181
1034	# this is slightly dirty (should expose a c-level api)	1182	int
1035		1183	cctx_idle ()
1036	void	1184	CODE:
1037	yield(...)	1185	RETVAL = cctx_idle;
1038	PROTOTYPE: @	1186	OUTPUT:
1039	CODE:	1187	RETVAL
1040	static SV *returnstk;
1041	SV *sv;
1042	AV *defav = GvAV (PL_defgv);
1043	struct coro *prev, *next;
1044
1045	if (!returnstk)
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048	/* set up @_ -- ugly */
1049	av_clear (defav);
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1057	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1188
1062	MODULE = Coro::State PACKAGE = Coro	1189	MODULE = Coro::State PACKAGE = Coro
1063		1190
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1191	BOOT:
1067	{	1192	{
1068	int i;	1193	int i;
		1194
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1195	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1196
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1197	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1198	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1199	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1200	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1201	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1202	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1203
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1204	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1205	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1206
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1207	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1089	coroapi.ready = api_ready;	1215	coroapi.ready = api_ready;
1090	coroapi.nready = &coro_nready;	1216	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1217	coroapi.current = coro_current;
1092		1218
1093	GCoroAPI = &coroapi;	1219	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1220	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1221	SvREADONLY_on (sv);
1096	}	1222	}
1097	}	1223	}
1098		1224
1099	#if !PERL_MICRO	1225	int
		1226	prio (Coro::State coro, int newprio = 0)
		1227	ALIAS:
		1228	nice = 1
		1229	CODE:
		1230	{
		1231	RETVAL = coro->prio;
		1232
		1233	if (items > 1)
		1234	{
		1235	if (ix)
		1236	newprio += coro->prio;
		1237
		1238	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1239	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1240
		1241	coro->prio = newprio;
		1242	}
		1243	}
1100		1244
1101	void	1245	void
1102	ready(self)	1246	ready (SV *self)
1103	SV * self
1104	PROTOTYPE: $	1247	PROTOTYPE: $
1105	CODE:	1248	CODE:
1106	api_ready (self);	1249	api_ready (self);
1107		1250
1108	#endif
1109
1110	int	1251	int
1111	nready(...)	1252	nready (...)
1112	PROTOTYPE:	1253	PROTOTYPE:
1113	CODE:	1254	CODE:
1114	RETVAL = coro_nready;	1255	RETVAL = coro_nready;
1115	OUTPUT:	1256	OUTPUT:
1116	RETVAL	1257	RETVAL
1117		1258
		1259	MODULE = Coro::State PACKAGE = Coro::AIO
		1260
		1261	SV *
		1262	_get_state ()
		1263	CODE:
		1264	{
		1265	struct {
		1266	int errorno;
		1267	int laststype;
		1268	int laststatval;
		1269	Stat_t statcache;
		1270	} data;
		1271
		1272	data.errorno = errno;
		1273	data.laststype = PL_laststype;
		1274	data.laststatval = PL_laststatval;
		1275	data.statcache = PL_statcache;
		1276
		1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1278	}
		1279	OUTPUT:
		1280	RETVAL
		1281
1118	void	1282	void
1119	schedule(...)	1283	_set_state (char *data_)
1120	PROTOTYPE:	1284	PROTOTYPE: $
1121	CODE:	1285	CODE:
1122	api_schedule ();	1286	{
		1287	struct {
		1288	int errorno;
		1289	int laststype;
		1290	int laststatval;
		1291	Stat_t statcache;
		1292	} *data = (void *)data_;
1123		1293
1124	void	1294	errno = data->errorno;
1125	cede(...)	1295	PL_laststype = data->laststype;
1126	PROTOTYPE:	1296	PL_laststatval = data->laststatval;
1127	CODE:	1297	PL_statcache = data->statcache;
1128	api_cede ();	1298	}
1129

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