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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 1.100 by root, Mon Nov 27 00:07:49 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	#define PERL_VERSION_ATLEAST(a,b,c) \
		10	(PERL_REVISION > (a) \
		11	|| (PERL_REVISION == (a) \
		12	&& (PERL_VERSION > (b) \
		13	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		14
		15	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	16	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	17	# define PL_ppaddr ppaddr
10	# endif	18	# endif
11	# ifndef call_sv	19	# ifndef call_sv
12	# define call_sv perl_call_sv	20	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	31	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	32	# define IS_PADCONST(v) 0
25	# endif	33	# endif
26	#endif	34	#endif
27		35
28	#include "libcoro/coro.c"
29
30	#include <signal.h>	36	#include <stdio.h>
		37	#include <errno.h>
		38
		39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		40	# undef STACKGUARD
		41	#endif
		42
		43	#ifndef STACKGUARD
		44	# define STACKGUARD 0
		45	#endif
31		46
32	#ifdef HAVE_MMAP	47	#ifdef HAVE_MMAP
33	# include <unistd.h>	48	# include <unistd.h>
34	# include <sys/mman.h>	49	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	50	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	52	# define MAP_ANONYMOUS MAP_ANON
38	# else	53	# else
39	# undef HAVE_MMAP	54	# undef HAVE_MMAP
40	# endif	55	# endif
41	# endif	56	# endif
		57	# include <limits.h>
		58	# ifndef PAGESIZE
		59	# define PAGESIZE pagesize
		60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		61	static long pagesize;
		62	# else
		63	# define BOOT_PAGESIZE
42	#endif	64	# endif
43		65	#endif
44	#define SUB_INIT "Coro::State::initialize"
45	#define UCORO_STATE "_coro_state"
46		66
47	/* The next macro should declare a variable stacklevel that contains and approximation	67	/* 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	68	* to the current C stack pointer. Its property is that it changes with each call
49	* and should be unique. */	69	* and should be unique. */
		70	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	71	#define STACKLEVEL ((void *)&stacklevel)
51		72
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	73	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		74
54	#define labs(l) ((l) >= 0 ? (l) : -(l))	75	#if __GNUC__ >= 3
		76	# define attribute(x) __attribute__(x)
		77	#else
		78	# define attribute(x)
		79	#endif
		80
		81	#define NOINLINE attribute ((noinline))
55		82
56	#include "CoroAPI.h"	83	#include "CoroAPI.h"
		84
		85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
57		86
58	#ifdef USE_ITHREADS	87	#ifdef USE_ITHREADS
59	static perl_mutex coro_mutex;	88	static perl_mutex coro_mutex;
60	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
61	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
62	#else	91	#else
63	# define LOCK 0	92	# define LOCK (void)0
64	# define UNLOCK 0	93	# define UNLOCK (void)0
65	#endif	94	#endif
66		95
67	static struct CoroAPI coroapi;	96	static struct CoroAPI coroapi;
		97	static AV *main_mainstack; /* used to differentiate between $main and others */
		98	static HV *coro_state_stash, *coro_stash;
		99	static SV *coro_mortal; /* will be freed after next transfer */
68		100
69	/* this is actually not only the c stack but also c registers etc... */	101	/* this is a structure representing a c-level coroutine */
70	typedef struct {	102	typedef struct coro_stack {
71	int refcnt; /* pointer reference counter */	103	struct coro_stack *next;
72	int usecnt; /* shared by how many coroutines */
73	int gencnt; /* generation counter */
74		104
75	coro_context cctx;	105	/* the stack */
76
77	void *sptr;	106	void *sptr;
78	long ssize; /* positive == mmap, otherwise malloc */	107	long ssize; /* positive == mmap, otherwise malloc */
		108
		109	/* cpu state */
		110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		111	JMPENV *top_env;
		112	coro_context cctx;
79	} coro_stack;	113	} coro_stack;
80		114
		115	/* this is a structure representing a perl-level coroutine */
81	struct coro {	116	struct coro {
82	/* the top-level JMPENV for each coroutine, needed to catch dies. */	117	/* the c coroutine allocated to this perl coroutine, if any */
83	JMPENV start_env;
84
85	/* the optional C context */
86	coro_stack *stack;	118	coro_stack *stack;
87	void *cursp;	119
		120	/* data associated with this coroutine (initial args) */
		121	AV *args;
88	int gencnt;	122	int refcnt;
89		123
90	/* optionally saved, might be zero */	124	/* optionally saved, might be zero */
91	AV *defav;	125	AV *defav;
92	SV *defsv;	126	SV *defsv;
93	SV *errsv;	127	SV *errsv;
…		…
102	AV *mainstack;	136	AV *mainstack;
103	SV **stack_sp;	137	SV **stack_sp;
104	OP *op;	138	OP *op;
105	SV **curpad;	139	SV **curpad;
106	AV *comppad;	140	AV *comppad;
		141	CV *compcv;
107	SV **stack_base;	142	SV **stack_base;
108	SV **stack_max;	143	SV **stack_max;
109	SV **tmps_stack;	144	SV **tmps_stack;
110	I32 tmps_floor;	145	I32 tmps_floor;
111	I32 tmps_ix;	146	I32 tmps_ix;
…		…
120	I32 savestack_ix;	155	I32 savestack_ix;
121	I32 savestack_max;	156	I32 savestack_max;
122	OP **retstack;	157	OP **retstack;
123	I32 retstack_ix;	158	I32 retstack_ix;
124	I32 retstack_max;	159	I32 retstack_max;
		160	PMOP *curpm;
125	COP *curcop;	161	COP *curcop;
126	JMPENV *top_env;
127		162
128	/* data associated with this coroutine (initial args) */	163	/* coro process data */
129	AV *args;	164	int prio;
130	};	165	};
131		166
132	typedef struct coro *Coro__State;	167	typedef struct coro *Coro__State;
133	typedef struct coro *Coro__State_or_hashref;	168	typedef struct coro *Coro__State_or_hashref;
134		169
135	static AV *main_mainstack; /* used to differentiate between $main and others */	170	static AV *
136	static HV *coro_state_stash;	171	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	{	172	{
145	AV *av;	173	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;	174	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		175
164	newpadlist = newAV ();	176	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	177	AvREAL_off (newpadlist);
166	av_store (newpadlist, 0, (SV *) newpad_name);	178	#if PERL_VERSION_ATLEAST (5,9,0)
		179	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		180	#else
		181	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		182	#endif
		183	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		184	--AvFILLp (padlist);
		185
		186	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
167	av_store (newpadlist, 1, (SV *) newpad);	187	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		188
238	return newpadlist;	189	return newpadlist;
239	}	190	}
240		191
241	STATIC void	192	static void
242	free_padlist (AV *padlist)	193	free_padlist (AV *padlist)
243	{	194	{
244	/* may be during global destruction */	195	/* may be during global destruction */
245	if (SvREFCNT (padlist))	196	if (SvREFCNT (padlist))
246	{	197	{
…		…
260		211
261	SvREFCNT_dec ((SV*)padlist);	212	SvREFCNT_dec ((SV*)padlist);
262	}	213	}
263	}	214	}
264		215
265	STATIC int	216	static int
266	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	217	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267	{	218	{
268	AV *padlist;	219	AV *padlist;
269	AV *av = (AV *)mg->mg_obj;	220	AV *av = (AV *)mg->mg_obj;
270		221
271	/* casting is fun. */	222	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (padlist);	224	free_padlist (padlist);
		225
		226	SvREFCNT_dec (av);
		227
		228	return 0;
274	}	229	}
275		230
276	#define PERL_MAGIC_coro PERL_MAGIC_ext	231	#define PERL_MAGIC_coro PERL_MAGIC_ext
277		232
278	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
279		234
280	/* the next two functions merely cache the padlists */	235	/* the next two functions merely cache the padlists */
281	STATIC void	236	static void
282	get_padlist (CV *cv)	237	get_padlist (CV *cv)
283	{	238	{
284	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
285		240
286	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
287	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
288	else	243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
289	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
290	}	255	}
291		256
292	STATIC void	257	static void
293	put_padlist (CV *cv)	258	put_padlist (CV *cv)
294	{	259	{
295	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
296		261
297	if (!mg)	262	if (!mg)
…		…
306	}	271	}
307		272
308	#define SB do {	273	#define SB do {
309	#define SE } while (0)	274	#define SE } while (0)
310		275
311	#define LOAD(state) load_state(aTHX_ (state));	276	#define LOAD(state) load_state((state));
312	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	277	#define SAVE(state,flags) save_state((state),(flags));
313		278
314	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
315		280
316	static void	281	static void
317	load_state(pTHX_ Coro__State c)	282	load_state(Coro__State c)
318	{	283	{
319	PL_dowarn = c->dowarn;	284	PL_dowarn = c->dowarn;
320	PL_in_eval = c->in_eval;	285	PL_in_eval = c->in_eval;
321		286
322	PL_curstackinfo = c->curstackinfo;	287	PL_curstackinfo = c->curstackinfo;
…		…
324	PL_mainstack = c->mainstack;	289	PL_mainstack = c->mainstack;
325	PL_stack_sp = c->stack_sp;	290	PL_stack_sp = c->stack_sp;
326	PL_op = c->op;	291	PL_op = c->op;
327	PL_curpad = c->curpad;	292	PL_curpad = c->curpad;
328	PL_comppad = c->comppad;	293	PL_comppad = c->comppad;
		294	PL_compcv = c->compcv;
329	PL_stack_base = c->stack_base;	295	PL_stack_base = c->stack_base;
330	PL_stack_max = c->stack_max;	296	PL_stack_max = c->stack_max;
331	PL_tmps_stack = c->tmps_stack;	297	PL_tmps_stack = c->tmps_stack;
332	PL_tmps_floor = c->tmps_floor;	298	PL_tmps_floor = c->tmps_floor;
333	PL_tmps_ix = c->tmps_ix;	299	PL_tmps_ix = c->tmps_ix;
…		…
339	PL_scopestack_ix = c->scopestack_ix;	305	PL_scopestack_ix = c->scopestack_ix;
340	PL_scopestack_max = c->scopestack_max;	306	PL_scopestack_max = c->scopestack_max;
341	PL_savestack = c->savestack;	307	PL_savestack = c->savestack;
342	PL_savestack_ix = c->savestack_ix;	308	PL_savestack_ix = c->savestack_ix;
343	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
		310	#if !PERL_VERSION_ATLEAST (5,9,0)
344	PL_retstack = c->retstack;	311	PL_retstack = c->retstack;
345	PL_retstack_ix = c->retstack_ix;	312	PL_retstack_ix = c->retstack_ix;
346	PL_retstack_max = c->retstack_max;	313	PL_retstack_max = c->retstack_max;
		314	#endif
		315	PL_curpm = c->curpm;
347	PL_curcop = c->curcop;	316	PL_curcop = c->curcop;
348	PL_top_env = c->top_env;
349		317
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
353		321
…		…
372	PUTBACK;	340	PUTBACK;
373	}	341	}
374	}	342	}
375		343
376	static void	344	static void
377	save_state(pTHX_ Coro__State c, int flags)	345	save_state(Coro__State c, int flags)
378	{	346	{
379	{	347	{
380	dSP;	348	dSP;
381	I32 cxix = cxstack_ix;	349	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	350	PERL_CONTEXT *ccstk = cxstack;
…		…
410	}	378	}
411		379
412	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST(cv));
413	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
414		382
415	get_padlist (cv); /* this is a monster */	383	get_padlist (cv);
416	}	384	}
417	}	385	}
418	#ifdef CXt_FORMAT	386	#ifdef CXt_FORMAT
419	else if (CxTYPE(cx) == CXt_FORMAT)	387	else if (CxTYPE(cx) == CXt_FORMAT)
420	{	388	{
…		…
448	c->mainstack = PL_mainstack;	416	c->mainstack = PL_mainstack;
449	c->stack_sp = PL_stack_sp;	417	c->stack_sp = PL_stack_sp;
450	c->op = PL_op;	418	c->op = PL_op;
451	c->curpad = PL_curpad;	419	c->curpad = PL_curpad;
452	c->comppad = PL_comppad;	420	c->comppad = PL_comppad;
		421	c->compcv = PL_compcv;
453	c->stack_base = PL_stack_base;	422	c->stack_base = PL_stack_base;
454	c->stack_max = PL_stack_max;	423	c->stack_max = PL_stack_max;
455	c->tmps_stack = PL_tmps_stack;	424	c->tmps_stack = PL_tmps_stack;
456	c->tmps_floor = PL_tmps_floor;	425	c->tmps_floor = PL_tmps_floor;
457	c->tmps_ix = PL_tmps_ix;	426	c->tmps_ix = PL_tmps_ix;
…		…
463	c->scopestack_ix = PL_scopestack_ix;	432	c->scopestack_ix = PL_scopestack_ix;
464	c->scopestack_max = PL_scopestack_max;	433	c->scopestack_max = PL_scopestack_max;
465	c->savestack = PL_savestack;	434	c->savestack = PL_savestack;
466	c->savestack_ix = PL_savestack_ix;	435	c->savestack_ix = PL_savestack_ix;
467	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
		437	#if !PERL_VERSION_ATLEAST (5,9,0)
468	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
469	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
470	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
		441	#endif
		442	c->curpm = PL_curpm;
471	c->curcop = PL_curcop;	443	c->curcop = PL_curcop;
472	c->top_env = PL_top_env;
473	}	444	}
474		445
475	/*	446	/*
476	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
477	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
478	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
479	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
480	*/	451	*/
481	STATIC void	452	static void
482	coro_init_stacks (pTHX)	453	coro_init_stacks ()
483	{	454	{
484	LOCK;
485
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487	PL_curstackinfo->si_type = PERLSI_MAIN;	456	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	457	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		459
…		…
511		480
512	New(54,PL_savestack,96,ANY);	481	New(54,PL_savestack,96,ANY);
513	PL_savestack_ix = 0;	482	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	483	PL_savestack_max = 96;
515		484
		485	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	486	New(54,PL_retstack,8,OP*);
517	PL_retstack_ix = 0;	487	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	488	PL_retstack_max = 8;
519		489	#endif
520	UNLOCK;
521	}	490	}
522		491
523	/*	492	/*
524	* destroy the stacks, the callchain etc...	493	* destroy the stacks, the callchain etc...
525	*/	494	*/
526	STATIC void	495	static void
527	destroy_stacks(pTHX)	496	destroy_stacks()
528	{	497	{
529	if (!IN_DESTRUCT)	498	if (!IN_DESTRUCT)
530	{	499	{
531	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
532	LEAVE_SCOPE (0);	501	LEAVE_SCOPE (0);
533		502
534	/* sure it is, but more important: is it correct?? :/ */	503	/* sure it is, but more important: is it correct?? :/ */
535	FREETMPS;	504	FREETMPS;
		505
		506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
536	}	507	}
537		508
538	while (PL_curstackinfo->si_next)	509	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	510	PL_curstackinfo = PL_curstackinfo->si_next;
540		511
541	while (PL_curstackinfo)	512	while (PL_curstackinfo)
542	{	513	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	514	PERL_SI *p = PL_curstackinfo->si_prev;
544		515
545	{	516	{ /*D*//*remove*/
546	dSP;	517	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */	519	PUTBACK; /* possibly superfluous */
549	}	520	}
550		521
551	if (!IN_DESTRUCT)	522	if (!IN_DESTRUCT)
552	{	523	{
553	dounwind(-1);	524	dounwind (-1);/*D*//*remove*/
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	525	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}	526	}
556		527
557	Safefree(PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	529	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	530	PL_curstackinfo = p;
560	}	531	}
561		532
562	Safefree(PL_tmps_stack);	533	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	534	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	535	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	536	Safefree (PL_savestack);
		537	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	538	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	539	#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	}	540	}
598		541
599	static void	542	static void
600	deallocate_stack (Coro__State ctx)	543	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	{	544	{
627	/*	545	/*
628	* emulate part of the perl startup here.	546	* emulate part of the perl startup here.
629	*/	547	*/
		548	dTHX;
630	dSP;	549	dSP;
631	Coro__State ctx = (Coro__State)arg;	550	UNOP myop;
632	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	551	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
633		552
634	coro_init_stacks (aTHX);	553	coro_init_stacks ();
635	/*PL_curcop = 0;*/	554	/*PL_curcop = 0;*/
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */	555	/*PL_in_eval = PL_in_eval;*/ /* inherit */
637	SvREFCNT_dec (GvAV (PL_defgv));	556	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	557	GvAV (PL_defgv) = coro->args; coro->args = 0;
639		558
640	SPAGAIN;	559	SPAGAIN;
641		560
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);	561	Zero (&myop, 1, UNOP);
662	myop.op_next = Nullop;	562	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;	563	myop.op_flags = OPf_WANT_VOID;
664		564
		565	PL_op = (OP *)&myop;
		566
665	PUSHMARK(SP);	567	PUSHMARK(SP);
666	XPUSHs (sub_init);	568	XPUSHs (sub_init);
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;	569	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	570	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;	571	SPAGAIN;
677		572
678	ENTER; /* necessary e.g. for dounwind */	573	ENTER; /* necessary e.g. for dounwind */
679	}
680	}	574	}
681		575
682	static void	576	static void
683	continue_coro (void *arg)	577	free_coro_mortal ()
684	{	578	{
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)	579	if (coro_mortal)
794	{	580	{
795	SvREFCNT_dec (coro_mortal);	581	SvREFCNT_dec (coro_mortal);
796	coro_mortal = 0;	582	coro_mortal = 0;
797	}	583	}
		584	}
		585
		586	static void NOINLINE
		587	prepare_cctx (coro_stack *cctx)
		588	{
		589	dSP;
		590	UNOP myop;
		591
		592	Zero (&myop, 1, UNOP);
		593	myop.op_next = PL_op;
		594	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		595
		596	PUSHMARK(SP);
		597	EXTEND (SP, 2);
		598	PUSHs (newSViv (PTR2IV (cctx)));
		599	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		600	PUTBACK;
		601	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		602	SPAGAIN;
		603	}
		604
		605	static void
		606	coro_run (void *arg)
		607	{
		608	/*
		609	* this is a _very_ stripped down perl interpreter ;)
		610	*/
798	UNLOCK;	611	UNLOCK;
799	}
800		612
801	#define SV_CORO(sv,func) \	613	PL_top_env = &PL_start_env;
802	do { \	614	prepare_cctx ((coro_stack *)arg);
803	if (SvROK (sv)) \
804	sv = SvRV (sv); \
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		615
822	#define SvSTATE(sv) (struct coro *)SvIV (sv)	616	/* somebody will hit me for both perl_run and PL_restartop */
		617	perl_run (PERL_GET_CONTEXT);
823		618
		619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		620	abort ();
		621	}
		622
		623	static coro_stack *
		624	stack_new ()
		625	{
		626	coro_stack *stack;
		627
		628	New (0, stack, 1, coro_stack);
		629
		630	#if HAVE_MMAP
		631
		632	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		633	/* mmap suppsedly does allocate-on-write for us */
		634	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		635
		636	if (stack->sptr == (void *)-1)
		637	{
		638	perror ("FATAL: unable to mmap stack for coroutine");
		639	_exit (EXIT_FAILURE);
		640	}
		641
		642	# if STACKGUARD
		643	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		644	# endif
		645
		646	#else
		647
		648	stack->ssize = STACKSIZE * (long)sizeof (long);
		649	New (0, stack->sptr, STACKSIZE, long);
		650
		651	if (!stack->sptr)
		652	{
		653	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		654	_exit (EXIT_FAILURE);
		655	}
		656
		657	#endif
		658
		659	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		660
		661	return stack;
		662	}
		663
		664	static void
		665	stack_free (coro_stack *stack)
		666	{
		667	if (!stack)
		668	return;
		669
		670	#if HAVE_MMAP
		671	munmap (stack->sptr, stack->ssize);
		672	#else
		673	Safefree (stack->sptr);
		674	#endif
		675
		676	Safefree (stack);
		677	}
		678
		679	static coro_stack *stack_first;
		680
		681	static coro_stack *
		682	stack_get ()
		683	{
		684	coro_stack *stack;
		685
		686	if (stack_first)
		687	{
		688	stack = stack_first;
		689	stack_first = stack->next;
		690	}
		691	else
		692	{
		693	stack = stack_new ();
		694	PL_op = PL_op->op_next;
		695	}
		696
		697	return stack;
		698	}
		699
		700	static void
		701	stack_put (coro_stack *stack)
		702	{
		703	stack->next = stack_first;
		704	stack_first = stack;
		705	}
		706
		707	/* never call directly, always through the coro_state_transfer global variable */
		708	static void NOINLINE
		709	transfer (struct coro *prev, struct coro *next, int flags)
		710	{
		711	dSTACKLEVEL;
		712
		713	/* sometimes transfer is only called to set idle_sp */
		714	if (flags == TRANSFER_SET_STACKLEVEL)
		715	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		716	else if (prev != next)
		717	{
		718	coro_stack *prev__stack;
		719
		720	LOCK;
		721
		722	if (next->mainstack)
		723	{
		724	/* coroutine already started */
		725	SAVE (prev, flags);
		726	LOAD (next);
		727	}
		728	else
		729	{
		730	/* need to start coroutine */
		731	/* first get rid of the old state */
		732	SAVE (prev, -1);
		733	/* setup coroutine call */
		734	setup_coro (next);
		735	/* need a stack */
		736	next->stack = 0;
		737	}
		738
		739	if (!prev->stack)
		740	/* create a new empty context */
		741	Newz (0, prev->stack, 1, coro_stack);
		742
		743	prev__stack = prev->stack;
		744
		745	/* possibly "free" the stack */
		746	if (prev__stack->idle_sp == STACKLEVEL)
		747	{
		748	stack_put (prev__stack);
		749	prev->stack = 0;
		750	}
		751
		752	if (!next->stack)
		753	next->stack = stack_get ();
		754
		755	if (prev__stack != next->stack)
		756	{
		757	prev__stack->top_env = PL_top_env;
		758	PL_top_env = next->stack->top_env;
		759	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		760	}
		761
		762	free_coro_mortal ();
		763
		764	UNLOCK;
		765	}
		766	}
		767
		768	struct transfer_args
		769	{
		770	struct coro *prev, *next;
		771	int flags;
		772	};
		773
		774	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		775
		776	static void
		777	coro_state_destroy (struct coro *coro)
		778	{
		779	if (coro->refcnt--)
		780	return;
		781
		782	if (coro->mainstack && coro->mainstack != main_mainstack)
		783	{
		784	struct coro temp;
		785
		786	SAVE ((&temp), TRANSFER_SAVE_ALL);
		787	LOAD (coro);
		788
		789	destroy_stacks ();
		790
		791	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		792
		793	coro->mainstack = 0;
		794	}
		795
		796	stack_free (coro->stack);
		797	SvREFCNT_dec (coro->args);
		798	Safefree (coro);
		799	}
		800
824	static void	801	static int
		802	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		803	{
		804	struct coro *coro = (struct coro *)mg->mg_ptr;
		805	mg->mg_ptr = 0;
		806
		807	coro_state_destroy (coro);
		808
		809	return 0;
		810	}
		811
		812	static int
		813	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		814	{
		815	struct coro *coro = (struct coro *)mg->mg_ptr;
		816
		817	++coro->refcnt;
		818
		819	return 0;
		820	}
		821
		822	static MGVTBL coro_state_vtbl = {
		823	0, 0, 0, 0,
		824	coro_state_clear,
		825	0,
		826	#ifdef MGf_DUP
		827	coro_state_dup,
		828	#endif
		829	};
		830
		831	static struct coro *
		832	SvSTATE (SV *coro)
		833	{
		834	HV *stash;
		835	MAGIC *mg;
		836
		837	if (SvROK (coro))
		838	coro = SvRV (coro);
		839
		840	stash = SvSTASH (coro);
		841	if (stash != coro_stash && stash != coro_state_stash)
		842	{
		843	/* very slow, but rare, check */
		844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		845	croak ("Coro::State object required");
		846	}
		847
		848	mg = SvMAGIC (coro);
		849	assert (mg->mg_type == PERL_MAGIC_ext);
		850	return (struct coro *)mg->mg_ptr;
		851	}
		852
		853	static void
		854	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		855	{
		856	ta->prev = SvSTATE (prev);
		857	ta->next = SvSTATE (next);
		858	ta->flags = flags;
		859	}
		860
		861	static void
825	api_transfer(pTHX_ SV *prev, SV *next, int flags)	862	api_transfer (SV *prev, SV *next, int flags)
826	{	863	{
827	SV_CORO (prev, "Coro::transfer");	864	dTHX;
828	SV_CORO (next, "Coro::transfer");	865	struct transfer_args ta;
829		866
830	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	867	prepare_transfer (&ta, prev, next, flags);
		868	TRANSFER (ta);
831	}	869	}
832		870
833	/** Coro ********************************************************************/	871	/** Coro ********************************************************************/
834		872
835	#define PRIO_MAX 3	873	#define PRIO_MAX 3
…		…
839	#define PRIO_IDLE -3	877	#define PRIO_IDLE -3
840	#define PRIO_MIN -4	878	#define PRIO_MIN -4
841		879
842	/* for Coro.pm */	880	/* for Coro.pm */
843	static GV *coro_current, *coro_idle;	881	static GV *coro_current, *coro_idle;
844	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
845	static int coro_nready;	883	static int coro_nready;
846		884
847	static void	885	static void
848	coro_enq (SV *sv)	886	coro_enq (SV *sv)
849	{	887	{
		888	int prio;
		889
850	if (SvTYPE (sv) == SVt_PVHV)	890	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");	891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		892
		893	prio = SvSTATE (sv)->prio;
		894
		895	av_push (coro_ready [prio - PRIO_MIN], sv);
		896	coro_nready++;
866	}	897	}
867		898
868	static SV *	899	static SV *
869	coro_deq (int min_prio)	900	coro_deq (int min_prio)
870	{	901	{
…		…
873	min_prio -= PRIO_MIN;	904	min_prio -= PRIO_MIN;
874	if (min_prio < 0)	905	if (min_prio < 0)
875	min_prio = 0;	906	min_prio = 0;
876		907
877	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
878	if (av_len (coro_ready[prio]) >= 0)	909	if (AvFILLp (coro_ready [prio]) >= 0)
879	{	910	{
880	coro_nready--;	911	coro_nready--;
881	return av_shift (coro_ready[prio]);	912	return av_shift (coro_ready [prio]);
882	}	913	}
883		914
884	return 0;	915	return 0;
885	}	916	}
886		917
887	static void	918	static void
888	api_ready (SV *coro)	919	api_ready (SV *coro)
889	{	920	{
		921	dTHX;
		922
890	if (SvROK (coro))	923	if (SvROK (coro))
891	coro = SvRV (coro);	924	coro = SvRV (coro);
892		925
893	LOCK;	926	LOCK;
894	coro_enq (SvREFCNT_inc (coro));	927	coro_enq (SvREFCNT_inc (coro));
895	UNLOCK;	928	UNLOCK;
896	}	929	}
897		930
898	static void	931	static void
899	api_schedule (void)	932	prepare_schedule (struct transfer_args *ta)
900	{	933	{
901	SV *prev, *next;	934	SV *current, *prev, *next;
902		935
		936	current = GvSV (coro_current);
		937
		938	for (;;)
		939	{
		940	LOCK;
		941	next = coro_deq (PRIO_MIN);
		942	UNLOCK;
		943
		944	if (next)
		945	break;
		946
		947	{
		948	dSP;
		949
		950	ENTER;
		951	SAVETMPS;
		952
		953	PUSHMARK (SP);
		954	PUTBACK;
		955	call_sv (GvSV (coro_idle), G_DISCARD);
		956
		957	FREETMPS;
		958	LEAVE;
		959	}
		960	}
		961
		962	prev = SvRV (current);
		963	SvRV (current) = next;
		964
		965	/* free this only after the transfer */
903	LOCK;	966	LOCK;
904		967	free_coro_mortal ();
905	prev = SvRV (GvSV (coro_current));	968	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;	969	coro_mortal = prev;
913	SV_CORO (prev, "Coro::schedule");
914		970
915	SvRV (GvSV (coro_current)) = next;	971	ta->prev = SvSTATE (prev);
916		972	ta->next = SvSTATE (next);
917	SV_CORO (next, "Coro::schedule");	973	ta->flags = TRANSFER_SAVE_ALL;
918
919	UNLOCK;
920
921	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
922	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
923	}	974	}
924		975
925	static void	976	static void
926	api_cede (void)	977	prepare_cede (struct transfer_args *ta)
927	{	978	{
928	LOCK;	979	LOCK;
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	980	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930	UNLOCK;	981	UNLOCK;
931		982
		983	prepare_schedule (ta);
		984	}
		985
		986	static void
932	api_schedule ();	987	api_schedule (void)
		988	{
		989	dTHX;
		990	struct transfer_args ta;
		991
		992	prepare_schedule (&ta);
		993	TRANSFER (ta);
		994	}
		995
		996	static void
		997	api_cede (void)
		998	{
		999	dTHX;
		1000	struct transfer_args ta;
		1001
		1002	prepare_cede (&ta);
		1003	TRANSFER (ta);
933	}	1004	}
934		1005
935	MODULE = Coro::State PACKAGE = Coro::State	1006	MODULE = Coro::State PACKAGE = Coro::State
936		1007
937	PROTOTYPES: ENABLE	1008	PROTOTYPES: DISABLE
938		1009
939	BOOT:	1010	BOOT:
940	{ /* {} necessary for stoopid perl-5.6.x */	1011	{
941	#ifdef USE_ITHREADS	1012	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1013	MUTEX_INIT (&coro_mutex);
943	#endif	1014	#endif
		1015	BOOT_PAGESIZE;
944		1016
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);	1017	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
948		1018
949	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1019	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
950	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1020	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
951	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1021	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
952	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
953		1022
954	main_mainstack = PL_mainstack;	1023	main_mainstack = PL_mainstack;
955		1024
956	coroapi.ver = CORO_API_VERSION;	1025	coroapi.ver = CORO_API_VERSION;
957	coroapi.transfer = api_transfer;	1026	coroapi.transfer = api_transfer;
958	}
959		1027
960	Coro::State	1028	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	_newprocess(args)	1029	}
962	SV * args	1030
963	PROTOTYPE: $	1031	SV *
		1032	new (char *klass, ...)
964	CODE:	1033	CODE:
965	Coro__State coro;	1034	{
		1035	struct coro *coro;
		1036	HV *hv;
		1037	int i;
966		1038
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);	1039	Newz (0, coro, 1, struct coro);
		1040	coro->args = newAV ();
971		1041
972	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1042	hv = newHV ();
		1043	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1044	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1045
		1046	for (i = 1; i < items; i++)
		1047	av_push (coro->args, newSVsv (ST (i)));
		1048
973	coro->mainstack = 0; /* actual work is done inside transfer */	1049	/*coro->mainstack = 0; *//*actual work is done inside transfer */
974	coro->stack = 0;	1050	/*coro->stack = 0;*/
975		1051	}
976	/* same as JMPENV_BOOTSTRAP */
977	/* we might be able to recycle start_env, but safe is safe */
978	//Zero(&coro->start_env, 1, JMPENV);
979	coro->start_env.je_ret = -1;
980	coro->start_env.je_mustcatch = TRUE;
981
982	RETVAL = coro;
983	OUTPUT:	1052	OUTPUT:
984	RETVAL	1053	RETVAL
985		1054
986	void	1055	void
987	transfer(prev, next, flags)	1056	_set_stacklevel (...)
988	SV *prev	1057	ALIAS:
989	SV *next	1058	Coro::State::transfer = 1
990	int flags	1059	Coro::schedule = 2
991	PROTOTYPE: @	1060	Coro::cede = 3
		1061	Coro::Cont::yield = 4
992	CODE:	1062	CODE:
993	PUTBACK;	1063	{
994	SV_CORO (next, "Coro::transfer");	1064	struct transfer_args ta;
995	SV_CORO (prev, "Coro::transfer");	1065
996	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1066	switch (ix)
997	SPAGAIN;	1067	{
		1068	case 0:
		1069	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1070	ta.next = 0;
		1071	ta.flags = TRANSFER_SET_STACKLEVEL;
		1072	break;
		1073
		1074	case 1:
		1075	if (items != 3)
		1076	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1077
		1078	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1079	break;
		1080
		1081	case 2:
		1082	prepare_schedule (&ta);
		1083	break;
		1084
		1085	case 3:
		1086	prepare_cede (&ta);
		1087	break;
		1088
		1089	case 4:
		1090	{
		1091	SV *yieldstack;
		1092	SV *sv;
		1093	AV *defav = GvAV (PL_defgv);
		1094
		1095	yieldstack = *hv_fetch (
		1096	(HV *)SvRV (GvSV (coro_current)),
		1097	"yieldstack", sizeof ("yieldstack") - 1,
		1098	0
		1099	);
		1100
		1101	/* set up @_ -- ugly */
		1102	av_clear (defav);
		1103	av_fill (defav, items - 1);
		1104	while (items--)
		1105	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1106
		1107	sv = av_pop ((AV *)SvRV (yieldstack));
		1108	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1109	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1110	ta.flags = 0;
		1111	SvREFCNT_dec (sv);
		1112	}
		1113	break;
		1114
		1115	}
		1116
		1117	TRANSFER (ta);
		1118	}
998		1119
999	void	1120	void
1000	DESTROY(coro)	1121	_clone_state_from (SV *dst, SV *src)
1001	Coro::State coro	1122	CODE:
1002	CODE:	1123	{
		1124	struct coro *coro_src = SvSTATE (src);
1003		1125
1004	if (coro->mainstack && coro->mainstack != main_mainstack)	1126	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1005	{
1006	struct coro temp;
1007		1127
1008	PUTBACK;	1128	++coro_src->refcnt;
1009	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1129	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1010	LOAD(aTHX_ coro);	1130	}
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		1131
1025	void	1132	void
1026	_exit(code)	1133	_exit (code)
1027	int code	1134	int code
1028	PROTOTYPE: $	1135	PROTOTYPE: $
1029	CODE:	1136	CODE:
1030	_exit (code);	1137	_exit (code);
1031		1138
1032	MODULE = Coro::State PACKAGE = Coro::Cont
1033
1034	# this is slightly dirty (should expose a c-level api)
1035
1036	void
1037	yield(...)
1038	PROTOTYPE: @
1039	CODE:
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
1062	MODULE = Coro::State PACKAGE = Coro	1139	MODULE = Coro::State PACKAGE = Coro
1063		1140
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1141	BOOT:
1067	{	1142	{
1068	int i;	1143	int i;
		1144
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1145	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1146
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1147	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1148	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1149	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1150	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1151	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1152	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1153
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1154	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1155	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1156
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1157	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1089	coroapi.ready = api_ready;	1165	coroapi.ready = api_ready;
1090	coroapi.nready = &coro_nready;	1166	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1167	coroapi.current = coro_current;
1092		1168
1093	GCoroAPI = &coroapi;	1169	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1170	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1171	SvREADONLY_on (sv);
1096	}	1172	}
1097	}	1173	}
1098		1174
1099	#if !PERL_MICRO	1175	int
		1176	prio (Coro::State coro, int newprio = 0)
		1177	ALIAS:
		1178	nice = 1
		1179	CODE:
		1180	{
		1181	RETVAL = coro->prio;
		1182
		1183	if (items > 1)
		1184	{
		1185	if (ix)
		1186	newprio += coro->prio;
		1187
		1188	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1189	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1190
		1191	coro->prio = newprio;
		1192	}
		1193	}
1100		1194
1101	void	1195	void
1102	ready(self)	1196	ready (SV *self)
1103	SV * self
1104	PROTOTYPE: $	1197	PROTOTYPE: $
1105	CODE:	1198	CODE:
1106	api_ready (self);	1199	api_ready (self);
1107		1200
1108	#endif
1109
1110	int	1201	int
1111	nready(...)	1202	nready (...)
1112	PROTOTYPE:	1203	PROTOTYPE:
1113	CODE:	1204	CODE:
1114	RETVAL = coro_nready;	1205	RETVAL = coro_nready;
1115	OUTPUT:	1206	OUTPUT:
1116	RETVAL	1207	RETVAL
1117		1208
		1209	MODULE = Coro::State PACKAGE = Coro::AIO
		1210
		1211	SV *
		1212	_get_state ()
		1213	CODE:
		1214	{
		1215	struct {
		1216	int errorno;
		1217	int laststype;
		1218	int laststatval;
		1219	Stat_t statcache;
		1220	} data;
		1221
		1222	data.errorno = errno;
		1223	data.laststype = PL_laststype;
		1224	data.laststatval = PL_laststatval;
		1225	data.statcache = PL_statcache;
		1226
		1227	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1228	}
		1229	OUTPUT:
		1230	RETVAL
		1231
1118	void	1232	void
1119	schedule(...)	1233	_set_state (char *data_)
1120	PROTOTYPE:	1234	PROTOTYPE: $
1121	CODE:	1235	CODE:
1122	api_schedule ();	1236	{
		1237	struct {
		1238	int errorno;
		1239	int laststype;
		1240	int laststatval;
		1241	Stat_t statcache;
		1242	} *data = (void *)data_;
1123		1243
1124	void	1244	errno = data->errorno;
1125	cede(...)	1245	PL_laststype = data->laststype;
1126	PROTOTYPE:	1246	PL_laststatval = data->laststatval;
1127	CODE:	1247	PL_statcache = data->statcache;
1128	api_cede ();	1248	}
1129

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