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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.81 by root, Fri Nov 3 00:56:03 2006 UTC vs.
Revision 1.109 by root, Mon Nov 27 18:45:29 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 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)
12	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
14	# endif	22	# endif
15	# ifndef call_sv	23	# ifndef call_sv
16	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
29	# endif	37	# endif
30	#endif	38	#endif
31		39
		40	#include <stdio.h>
32	#include <errno.h>	41	#include <errno.h>
33		42
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	44	# undef STACKGUARD
36	#endif	45	#endif
…		…
53	# ifndef PAGESIZE	62	# ifndef PAGESIZE
54	# define PAGESIZE pagesize	63	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;	65	static long pagesize;
57	# else	66	# else
58	# define BOOT_PAGESIZE	67	# define BOOT_PAGESIZE (void)0
59	# endif	68	# endif
		69	#else
		70	# define PAGESIZE 0
		71	# define BOOT_PAGESIZE (void)0
60	#endif	72	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64		73
65	/* 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
66	* 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
67	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
69		79
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		81
72	#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))
73		89
74	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
75		93
76	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
78	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
82	# define UNLOCK (void)0	100	# define UNLOCK (void)0
83	#endif	101	#endif
84		102
85	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
87	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
91		107
92	/* 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 */
93	typedef struct {	112	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		114
98	coro_context cctx;	115	/* the stack */
99
100	void *sptr;	116	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103		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 */
104	struct coro {	130	struct coro {
105	/* the optional C context */	131	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	132	coro_cctx *cctx;
107	void *cursp;	133
		134	/* data associated with this coroutine (initial args) */
		135	AV *args;
108	int gencnt;	136	int refcnt;
109		137
110	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
111	AV *defav;	139	AV *defav;
112	SV *defsv;	140	SV *defsv;
113	SV *errsv;	141	SV *errsv;
114		142
115	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
116	U8 dowarn;	144	# include "state.h"
117	I32 in_eval;	145	#undef VAR
118		146
119	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
120	PERL_SI *curstackinfo;	148	int prio;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149
150	/* data associated with this coroutine (initial args) */
151	AV *args;
152	};	149	};
153		150
154	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
156		153
157	static AV *	154	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	155	coro_clone_padlist (CV *cv)
159	{	156	{
160	AV *padlist = CvPADLIST (cv);	157	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	158	AV *newpadlist, *newpad;
162		159
163	newpadlist = newAV ();	160	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	162	#if PERL_VERSION_ATLEAST (5,9,0)
		163	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		164	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	166	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	167	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	168	--AvFILLp (padlist);
172		169
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	170	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
175		172
176	return newpadlist;	173	return newpadlist;
177	}	174	}
178		175
179	static void	176	static void
180	free_padlist (pTHX_ AV *padlist)	177	free_padlist (AV *padlist)
181	{	178	{
182	/* may be during global destruction */	179	/* may be during global destruction */
183	if (SvREFCNT (padlist))	180	if (SvREFCNT (padlist))
184	{	181	{
185	I32 i = AvFILLp (padlist);	182	I32 i = AvFILLp (padlist);
…		…
206	AV *padlist;	203	AV *padlist;
207	AV *av = (AV *)mg->mg_obj;	204	AV *av = (AV *)mg->mg_obj;
208		205
209	/* casting is fun. */	206	/* casting is fun. */
210	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	free_padlist (aTHX_ padlist);	208	free_padlist (padlist);
212		209
213	SvREFCNT_dec (av);	210	SvREFCNT_dec (av);
214		211
215	return 0;	212	return 0;
216	}	213	}
217		214
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		216
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		218
		219	#define CORO_MAGIC(cv) \
		220	SvMAGIC (cv) \
		221	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		222	? SvMAGIC (cv) \
		223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		224	: 0
		225
222	/* the next two functions merely cache the padlists */	226	/* the next two functions merely cache the padlists */
223	static void	227	static void
224	get_padlist (pTHX_ CV *cv)	228	get_padlist (CV *cv)
225	{	229	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	230	MAGIC *mg = CORO_MAGIC (cv);
		231	AV *av;
227		232
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	235	else
231	{	236	{
232	#if 0	237	#if 0
233	/* this should work - but it doesn't :( */	238	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	239	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	240	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	241	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	242	SvREFCNT_dec (cp);
238	#else	243	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	244	CvPADLIST (cv) = coro_clone_padlist (cv);
240	#endif	245	#endif
241	}	246	}
242	}	247	}
243		248
244	static void	249	static void
245	put_padlist (pTHX_ CV *cv)	250	put_padlist (CV *cv)
246	{	251	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	252	MAGIC *mg = CORO_MAGIC (cv);
		253	AV *av;
248		254
249	if (!mg)	255	if (!mg)
250	{	256	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	259	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	260	mg->mg_obj = (SV *)newAV ();
255	}	261	}
256		262
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	263	av = (AV *)mg->mg_obj;
		264
		265	if (AvFILLp (av) >= AvMAX (av))
		266	av_extend (av, AvMAX (av) + 1);
		267
		268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
258	}	269	}
259		270
260	#define SB do {	271	#define SB do {
261	#define SE } while (0)	272	#define SE } while (0)
262		273
263	#define LOAD(state) load_state(aTHX_ (state));	274	#define LOAD(state) load_state((state));
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	275	#define SAVE(state,flags) save_state((state),(flags));
265		276
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	277	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
267		278
268	static void	279	static void
269	load_state(pTHX_ Coro__State c)	280	load_state(Coro__State c)
270	{	281	{
271	PL_dowarn = c->dowarn;	282	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	283	# include "state.h"
273		284	#undef VAR
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		285
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		289
…		…
312	CV *cv;	292	CV *cv;
313		293
314	/* now do the ugly restore mess */	294	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	295	while ((cv = (CV *)POPs))
316	{	296	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	297	put_padlist (cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	298	CvDEPTH (cv) = PTR2IV (POPs);
323	}	299	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	300	}
327		301
328	PUTBACK;	302	PUTBACK;
329	}	303	}
330	}	304	}
331		305
332	static void	306	static void
333	save_state(pTHX_ Coro__State c, int flags)	307	save_state(Coro__State c, int flags)
334	{	308	{
335	{	309	{
336	dSP;	310	dSP;
337	I32 cxix = cxstack_ix;	311	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	312	PERL_CONTEXT *ccstk = cxstack;
…		…
352	PERL_CONTEXT *cx = &ccstk[cxix--];	326	PERL_CONTEXT *cx = &ccstk[cxix--];
353		327
354	if (CxTYPE(cx) == CXt_SUB)	328	if (CxTYPE(cx) == CXt_SUB)
355	{	329	{
356	CV *cv = cx->blk_sub.cv;	330	CV *cv = cx->blk_sub.cv;
		331
357	if (CvDEPTH(cv))	332	if (CvDEPTH (cv))
358	{	333	{
359	EXTEND (SP, CvDEPTH(cv)*2);	334	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367		335
368	PUSHs ((SV *)CvPADLIST(cv));	336	PUSHs ((SV *)CvPADLIST(cv));
		337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	338	PUSHs ((SV *)cv);
370		339
		340	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	341	get_padlist (cv);
372	}	342	}
373	}	343	}
374	#ifdef CXt_FORMAT	344	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)	345	else if (CxTYPE(cx) == CXt_FORMAT)
376	{	346	{
…		…
394		364
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
398		368
399	c->dowarn = PL_dowarn;	369	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	370	# include "state.h"
401		371	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	372	}
434		373
435	/*	374	/*
436	* allocate various perl stacks. This is an exact copy	375	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	376	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	377	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	378	* not usually need a lot of stackspace.
440	*/	379	*/
441	static void	380	static void
442	coro_init_stacks (pTHX)	381	coro_init_stacks ()
443	{	382	{
444	LOCK;
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	384	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	385	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		387
…		…
471		408
472	New(54,PL_savestack,96,ANY);	409	New(54,PL_savestack,96,ANY);
473	PL_savestack_ix = 0;	410	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	411	PL_savestack_max = 96;
475		412
476	#if PERL_VERSION < 9	413	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	414	New(54,PL_retstack,8,OP*);
478	PL_retstack_ix = 0;	415	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	416	PL_retstack_max = 8;
480	#endif	417	#endif
481
482	UNLOCK;
483	}	418	}
484		419
485	/*	420	/*
486	* destroy the stacks, the callchain etc...	421	* destroy the stacks, the callchain etc...
487	*/	422	*/
488	static void	423	static void
489	destroy_stacks(pTHX)	424	coro_destroy_stacks ()
490	{	425	{
491	if (!IN_DESTRUCT)	426	if (!IN_DESTRUCT)
492	{	427	{
493	/* is this ugly, I ask? */	428	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);	429	LEAVE_SCOPE (0);
…		…
525		460
526	Safefree (PL_tmps_stack);	461	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	462	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	463	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	464	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	465	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	466	Safefree (PL_retstack);
532	#endif	467	#endif
533	}	468	}
534		469
535	static void	470	static void
536	allocate_stack (Coro__State ctx, int alloc)	471	setup_coro (struct coro *coro)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{
548	#if HAVE_MMAP
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{
553	# if STACKGUARD
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
555	# endif
556	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566
567	ctx->stack = stack;
568	}
569
570	static void
571	deallocate_stack (Coro__State ctx)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	472	{
598	/*	473	/*
599	* emulate part of the perl startup here.	474	* emulate part of the perl startup here.
600	*/	475	*/
601	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		476
606	coro_init_stacks (aTHX);	477	coro_init_stacks ();
		478
607	/*PL_curcop = 0;*/	479	PL_curcop = 0;
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */	480	PL_in_eval = 0;
		481	PL_curpm = 0;
		482
		483	{
		484	dSP;
		485	LOGOP myop;
		486
		487	/* I have no idea why this is needed, but it is */
		488	PUSHMARK (SP);
		489
609	SvREFCNT_dec (GvAV (PL_defgv));	490	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	491	GvAV (PL_defgv) = coro->args; coro->args = 0;
611		492
612	SPAGAIN;
613
614	if (ctx->stack)
615	{
616	ctx->cursp = 0;
617
618	PUSHMARK(SP);
619	PUTBACK;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
621
622	if (SvTRUE (ERRSV))
623	croak (NULL);
624	else
625	croak ("FATAL: CCTXT coroutine returned!");
626	}
627	else
628	{
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);	493	Zero (&myop, 1, LOGOP);
632	myop.op_next = Nullop;	494	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	495	myop.op_flags = OPf_WANT_VOID;
634		496
635	PL_op = (OP *)&myop;	497	PL_op = (OP *)&myop;
636		498
637	PUSHMARK(SP);	499	PUSHMARK (SP);
638	XPUSHs (sub_init);	500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;	501	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;	503	SPAGAIN;
649		504
650	ENTER; /* necessary e.g. for dounwind */	505	ENTER; /* necessary e.g. for dounwind */
651	}	506	}
652	}	507	}
653		508
654	static void	509	static void
655	continue_coro (void *arg)	510	free_coro_mortal ()
656	{	511	{
657	/*
658	* this is a _very_ stripped down perl interpreter ;)
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662
663	PL_top_env = &PL_start_env;
664
665	ctx->cursp = 0;
666	PL_op = PL_op->op_next;
667	CALLRUNOPS(aTHX);
668
669	abort ();
670	}
671
672	static void
673	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
674	{
675	dSTACKLEVEL;
676
677	if (prev != next)
678	{
679	/* has this coro been created yet? */
680	if (next->mainstack)
681	{
682	LOCK;
683	SAVE (prev, flags);
684	LOAD (next);
685	UNLOCK;
686
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	prev->cursp = stacklevel;
715	/* don't add any code here */
716	}
717	else
718	next->cursp = stacklevel;
719	}
720	else if (next->tmps_ix == -2)
721	croak ("tried to transfer to running coroutine");
722	else
723	{
724	LOCK;
725	SAVE (prev, -1); /* first get rid of the old state */
726	UNLOCK;
727
728	/* create the coroutine for the first time */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733
734	/* the new coroutine starts with start_env again */
735	PL_top_env = &PL_start_env;
736
737	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
738	{
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}
765	}
766
767	LOCK;
768	if (coro_mortal)	512	if (coro_mortal)
769	{	513	{
770	SvREFCNT_dec (coro_mortal);	514	SvREFCNT_dec (coro_mortal);
771	coro_mortal = 0;	515	coro_mortal = 0;
772	}	516	}
		517	}
		518
		519	static void NOINLINE
		520	prepare_cctx (coro_cctx *cctx)
		521	{
		522	dSP;
		523	LOGOP myop;
		524
		525	Zero (&myop, 1, LOGOP);
		526	myop.op_next = PL_op;
		527	myop.op_flags = OPf_WANT_VOID;
		528
		529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		530
		531	PUSHMARK (SP);
		532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		533	PUTBACK;
		534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		535	SPAGAIN;
		536	}
		537
		538	static void
		539	coro_run (void *arg)
		540	{
		541	/* coro_run is the alternative epilogue of transfer() */
773	UNLOCK;	542	UNLOCK;
774	}
775		543
776	#define SV_CORO(sv,func) \	544	/*
777	do { \	545	* this is a _very_ stripped down perl interpreter ;)
778	if (SvROK (sv)) \	546	*/
779	sv = SvRV (sv); \	547	PL_top_env = &PL_start_env;
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		548
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	549	/* inject call to cctx_init */
		550	prepare_cctx ((coro_cctx *)arg);
798		551
		552	/* somebody will hit me for both perl_run and PL_restartop */
		553	perl_run (PL_curinterp);
		554
		555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		556	abort ();
		557	}
		558
		559	static coro_cctx *
		560	cctx_new ()
		561	{
		562	coro_cctx *cctx;
		563
		564	++cctx_count;
		565
		566	New (0, cctx, 1, coro_cctx);
		567
		568	#if HAVE_MMAP
		569
		570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		571	/* mmap suppsedly does allocate-on-write for us */
		572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		573
		574	if (cctx->sptr == (void *)-1)
		575	{
		576	perror ("FATAL: unable to mmap stack for coroutine");
		577	_exit (EXIT_FAILURE);
		578	}
		579
		580	# if STACKGUARD
		581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		582	# endif
		583
		584	#else
		585
		586	cctx->ssize = STACKSIZE * (long)sizeof (long);
		587	New (0, cctx->sptr, STACKSIZE, long);
		588
		589	if (!cctx->sptr)
		590	{
		591	perror ("FATAL: unable to malloc stack for coroutine");
		592	_exit (EXIT_FAILURE);
		593	}
		594
		595	#endif
		596
		597	#if USE_VALGRIND
		598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		600	cctx->ssize + (char *)cctx->sptr
		601	);
		602	#endif
		603
		604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		605
		606	return cctx;
		607	}
		608
		609	static void
		610	cctx_free (coro_cctx *cctx)
		611	{
		612	if (!cctx)
		613	return;
		614
		615	--cctx_count;
		616
		617	#if USE_VALGRIND
		618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		619	#endif
		620
		621	#if HAVE_MMAP
		622	munmap (cctx->sptr, cctx->ssize);
		623	#else
		624	Safefree (cctx->sptr);
		625	#endif
		626
		627	Safefree (cctx);
		628	}
		629
		630	static coro_cctx *
		631	cctx_get ()
		632	{
		633	coro_cctx *cctx;
		634
		635	if (cctx_first)
		636	{
		637	--cctx_idle;
		638	cctx = cctx_first;
		639	cctx_first = cctx->next;
		640	}
		641	else
		642	{
		643	cctx = cctx_new ();
		644	PL_op = PL_op->op_next;
		645	}
		646
		647	return cctx;
		648	}
		649
		650	static void
		651	cctx_put (coro_cctx *cctx)
		652	{
		653	++cctx_idle;
		654	cctx->next = cctx_first;
		655	cctx_first = cctx;
		656	}
		657
		658	/* never call directly, always through the coro_state_transfer global variable */
		659	static void NOINLINE
		660	transfer (struct coro *prev, struct coro *next, int flags)
		661	{
		662	dSTACKLEVEL;
		663
		664	/* sometimes transfer is only called to set idle_sp */
		665	if (flags == TRANSFER_SET_STACKLEVEL)
		666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		667	else if (prev != next)
		668	{
		669	coro_cctx *prev__cctx;
		670
		671	LOCK;
		672
		673	if (next->mainstack)
		674	{
		675	/* coroutine already started */
		676	SAVE (prev, flags);
		677	LOAD (next);
		678	}
		679	else
		680	{
		681	/* need to start coroutine */
		682	/* first get rid of the old state */
		683	SAVE (prev, -1);
		684	/* setup coroutine call */
		685	setup_coro (next);
		686	/* need a stack */
		687	next->cctx = 0;
		688	}
		689
		690	if (!prev->cctx)
		691	/* create a new empty context */
		692	Newz (0, prev->cctx, 1, coro_cctx);
		693
		694	prev__cctx = prev->cctx;
		695
		696	/* possibly "free" the cctx */
		697	if (prev__cctx->idle_sp == STACKLEVEL)
		698	{
		699	cctx_put (prev__cctx);
		700	prev->cctx = 0;
		701	}
		702
		703	if (!next->cctx)
		704	next->cctx = cctx_get ();
		705
		706	if (prev__cctx != next->cctx)
		707	{
		708	prev__cctx->top_env = PL_top_env;
		709	PL_top_env = next->cctx->top_env;
		710	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		711	}
		712
		713	free_coro_mortal ();
		714
		715	UNLOCK;
		716	}
		717	}
		718
		719	struct transfer_args
		720	{
		721	struct coro *prev, *next;
		722	int flags;
		723	};
		724
		725	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		726
		727	static void
		728	coro_state_destroy (struct coro *coro)
		729	{
		730	if (coro->refcnt--)
		731	return;
		732
		733	if (coro->mainstack && coro->mainstack != main_mainstack)
		734	{
		735	struct coro temp;
		736
		737	SAVE ((&temp), TRANSFER_SAVE_ALL);
		738	LOAD (coro);
		739
		740	coro_destroy_stacks ();
		741
		742	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		743
		744	coro->mainstack = 0;
		745	}
		746
		747	cctx_free (coro->cctx);
		748	SvREFCNT_dec (coro->args);
		749	Safefree (coro);
		750	}
		751
799	static void	752	static int
		753	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		754	{
		755	struct coro *coro = (struct coro *)mg->mg_ptr;
		756	mg->mg_ptr = 0;
		757
		758	coro_state_destroy (coro);
		759
		760	return 0;
		761	}
		762
		763	static int
		764	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		765	{
		766	struct coro *coro = (struct coro *)mg->mg_ptr;
		767
		768	++coro->refcnt;
		769
		770	return 0;
		771	}
		772
		773	static MGVTBL coro_state_vtbl = {
		774	0, 0, 0, 0,
		775	coro_state_clear,
		776	0,
		777	#ifdef MGf_DUP
		778	coro_state_dup,
		779	#else
		780	# define MGf_DUP 0
		781	#endif
		782	};
		783
		784	static struct coro *
		785	SvSTATE (SV *coro)
		786	{
		787	HV *stash;
		788	MAGIC *mg;
		789
		790	if (SvROK (coro))
		791	coro = SvRV (coro);
		792
		793	stash = SvSTASH (coro);
		794	if (stash != coro_stash && stash != coro_state_stash)
		795	{
		796	/* very slow, but rare, check */
		797	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		798	croak ("Coro::State object required");
		799	}
		800
		801	mg = SvMAGIC (coro);
		802	assert (mg->mg_type == PERL_MAGIC_ext);
		803	return (struct coro *)mg->mg_ptr;
		804	}
		805
		806	static void
		807	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		808	{
		809	ta->prev = SvSTATE (prev);
		810	ta->next = SvSTATE (next);
		811	ta->flags = flags;
		812	}
		813
		814	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	815	api_transfer (SV *prev, SV *next, int flags)
801	{	816	{
802	SV_CORO (prev, "Coro::transfer");	817	dTHX;
803	SV_CORO (next, "Coro::transfer");	818	struct transfer_args ta;
804		819
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	820	prepare_transfer (&ta, prev, next, flags);
		821	TRANSFER (ta);
806	}	822	}
807		823
808	/** Coro ********************************************************************/	824	/** Coro ********************************************************************/
809		825
810	#define PRIO_MAX 3	826	#define PRIO_MAX 3
…		…
814	#define PRIO_IDLE -3	830	#define PRIO_IDLE -3
815	#define PRIO_MIN -4	831	#define PRIO_MIN -4
816		832
817	/* for Coro.pm */	833	/* for Coro.pm */
818	static GV *coro_current, *coro_idle;	834	static GV *coro_current, *coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	835	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;	836	static int coro_nready;
821		837
822	static void	838	static void
823	coro_enq (pTHX_ SV *sv)	839	coro_enq (SV *sv)
824	{	840	{
825	SV **xprio;
826	int prio;	841	int prio;
827		842
828	if (SvTYPE (sv) != SVt_PVHV)	843	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");	844	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830		845
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	846	prio = SvSTATE (sv)->prio;
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837		847
838	av_push (coro_ready [prio - PRIO_MIN], sv);	848	av_push (coro_ready [prio - PRIO_MIN], sv);
839	coro_nready++;	849	coro_nready++;
840	}	850	}
841		851
842	static SV *	852	static SV *
843	coro_deq (pTHX_ int min_prio)	853	coro_deq (int min_prio)
844	{	854	{
845	int prio = PRIO_MAX - PRIO_MIN;	855	int prio = PRIO_MAX - PRIO_MIN;
846		856
847	min_prio -= PRIO_MIN;	857	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	858	if (min_prio < 0)
849	min_prio = 0;	859	min_prio = 0;
850		860
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	861	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	862	if (AvFILLp (coro_ready [prio]) >= 0)
853	{	863	{
854	coro_nready--;	864	coro_nready--;
855	return av_shift (coro_ready[prio]);	865	return av_shift (coro_ready [prio]);
856	}	866	}
857		867
858	return 0;	868	return 0;
859	}	869	}
860		870
…		…
865		875
866	if (SvROK (coro))	876	if (SvROK (coro))
867	coro = SvRV (coro);	877	coro = SvRV (coro);
868		878
869	LOCK;	879	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	880	coro_enq (SvREFCNT_inc (coro));
871	UNLOCK;	881	UNLOCK;
872	}	882	}
873		883
874	static void	884	static void
		885	prepare_schedule (struct transfer_args *ta)
		886	{
		887	SV *current, *prev, *next;
		888
		889	current = GvSV (coro_current);
		890
		891	for (;;)
		892	{
		893	LOCK;
		894	next = coro_deq (PRIO_MIN);
		895	UNLOCK;
		896
		897	if (next)
		898	break;
		899
		900	{
		901	dSP;
		902
		903	ENTER;
		904	SAVETMPS;
		905
		906	PUSHMARK (SP);
		907	PUTBACK;
		908	call_sv (GvSV (coro_idle), G_DISCARD);
		909
		910	FREETMPS;
		911	LEAVE;
		912	}
		913	}
		914
		915	prev = SvRV (current);
		916	SvRV (current) = next;
		917
		918	/* free this only after the transfer */
		919	LOCK;
		920	free_coro_mortal ();
		921	UNLOCK;
		922	coro_mortal = prev;
		923
		924	ta->prev = SvSTATE (prev);
		925	ta->next = SvSTATE (next);
		926	ta->flags = TRANSFER_SAVE_ALL;
		927	}
		928
		929	static void
		930	prepare_cede (struct transfer_args *ta)
		931	{
		932	LOCK;
		933	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		934	UNLOCK;
		935
		936	prepare_schedule (ta);
		937	}
		938
		939	static void
875	api_schedule (void)	940	api_schedule (void)
876	{	941	{
877	dTHX;	942	dTHX;
		943	struct transfer_args ta;
878		944
879	SV *prev, *next;	945	prepare_schedule (&ta);
880		946	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}	947	}
902		948
903	static void	949	static void
904	api_cede (void)	950	api_cede (void)
905	{	951	{
906	dTHX;	952	dTHX;
		953	struct transfer_args ta;
907		954
908	LOCK;	955	prepare_cede (&ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	956	TRANSFER (ta);
910	UNLOCK;
911
912	api_schedule ();
913	}	957	}
914		958
915	MODULE = Coro::State PACKAGE = Coro::State	959	MODULE = Coro::State PACKAGE = Coro::State
916		960
917	PROTOTYPES: ENABLE	961	PROTOTYPES: DISABLE
918		962
919	BOOT:	963	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	964	{
921	#ifdef USE_ITHREADS	965	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	966	MUTEX_INIT (&coro_mutex);
923	#endif	967	#endif
924	BOOT_PAGESIZE;	968	BOOT_PAGESIZE;
925		969
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	970	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		971
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	972	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	973	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	974	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
934		975
935	main_mainstack = PL_mainstack;	976	main_mainstack = PL_mainstack;
936		977
937	coroapi.ver = CORO_API_VERSION;	978	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	979	coroapi.transfer = api_transfer;
939	}
940		980
941	Coro::State	981	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	982	}
943	SV * args	983
944	PROTOTYPE: $	984	SV *
		985	new (char *klass, ...)
945	CODE:	986	CODE:
946	Coro__State coro;	987	{
		988	struct coro *coro;
		989	HV *hv;
		990	int i;
947		991
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	992	Newz (0, coro, 1, struct coro);
		993	coro->args = newAV ();
952		994
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	995	hv = newHV ();
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	996	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
955	/*coro->stack = 0;*/	997	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956		998
957	RETVAL = coro;	999	for (i = 1; i < items; i++)
		1000	av_push (coro->args, newSVsv (ST (i)));
		1001	}
958	OUTPUT:	1002	OUTPUT:
959	RETVAL	1003	RETVAL
960		1004
961	void	1005	void
962	transfer(prev, next, flags)	1006	_set_stacklevel (...)
963	SV *prev	1007	ALIAS:
964	SV *next	1008	Coro::State::transfer = 1
965	int flags	1009	Coro::schedule = 2
966	PROTOTYPE: @	1010	Coro::cede = 3
		1011	Coro::Cont::yield = 4
967	CODE:	1012	CODE:
968	PUTBACK;	1013	{
969	SV_CORO (next, "Coro::transfer");	1014	struct transfer_args ta;
970	SV_CORO (prev, "Coro::transfer");	1015
971	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1016	switch (ix)
972	SPAGAIN;	1017	{
		1018	case 0:
		1019	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1020	ta.next = 0;
		1021	ta.flags = TRANSFER_SET_STACKLEVEL;
		1022	break;
		1023
		1024	case 1:
		1025	if (items != 3)
		1026	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1027
		1028	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1029	break;
		1030
		1031	case 2:
		1032	prepare_schedule (&ta);
		1033	break;
		1034
		1035	case 3:
		1036	prepare_cede (&ta);
		1037	break;
		1038
		1039	case 4:
		1040	{
		1041	SV *yieldstack;
		1042	SV *sv;
		1043	AV *defav = GvAV (PL_defgv);
		1044
		1045	yieldstack = *hv_fetch (
		1046	(HV *)SvRV (GvSV (coro_current)),
		1047	"yieldstack", sizeof ("yieldstack") - 1,
		1048	0
		1049	);
		1050
		1051	/* set up @_ -- ugly */
		1052	av_clear (defav);
		1053	av_fill (defav, items - 1);
		1054	while (items--)
		1055	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1056
		1057	sv = av_pop ((AV *)SvRV (yieldstack));
		1058	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1059	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1060	ta.flags = 0;
		1061	SvREFCNT_dec (sv);
		1062	}
		1063	break;
		1064
		1065	}
		1066
		1067	TRANSFER (ta);
		1068	}
973		1069
974	void	1070	void
975	DESTROY(coro)	1071	_clone_state_from (SV *dst, SV *src)
976	Coro::State coro	1072	CODE:
977	CODE:	1073	{
		1074	struct coro *coro_src = SvSTATE (src);
978		1075
979	if (coro->mainstack && coro->mainstack != main_mainstack)	1076	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
980	{
981	struct coro temp;
982		1077
983	PUTBACK;	1078	++coro_src->refcnt;
984	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1079	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
985	LOAD (aTHX_ coro);	1080	}
986	SPAGAIN;
987
988	destroy_stacks (aTHX);
989
990	LOAD ((&temp)); /* this will get rid of defsv etc.. */
991	SPAGAIN;
992
993	coro->mainstack = 0;
994	}
995
996	deallocate_stack (coro);
997	SvREFCNT_dec (coro->args);
998	Safefree (coro);
999		1081
1000	void	1082	void
1001	_exit(code)	1083	_exit (code)
1002	int code	1084	int code
1003	PROTOTYPE: $	1085	PROTOTYPE: $
1004	CODE:	1086	CODE:
1005	_exit (code);	1087	_exit (code);
1006		1088
1007	MODULE = Coro::State PACKAGE = Coro::Cont	1089	int
		1090	cctx_count ()
		1091	CODE:
		1092	RETVAL = cctx_count;
		1093	OUTPUT:
		1094	RETVAL
1008		1095
1009	void	1096	int
1010	yield(...)	1097	cctx_idle ()
1011	PROTOTYPE: @	1098	CODE:
1012	CODE:	1099	RETVAL = cctx_idle;
1013	SV *yieldstack;	1100	OUTPUT:
1014	SV *sv;	1101	RETVAL
1015	AV *defav = GvAV (PL_defgv);
1016	struct coro *prev, *next;
1017
1018	yieldstack = *hv_fetch (
1019	(HV *)SvRV (GvSV (coro_current)),
1020	"yieldstack", sizeof ("yieldstack") - 1,
1021	0
1022	);
1023
1024	/* set up @_ -- ugly */
1025	av_clear (defav);
1026	av_fill (defav, items - 1);
1027	while (items--)
1028	av_store (defav, items, SvREFCNT_inc (ST(items)));
1029
1030	sv = av_pop ((AV *)SvRV (yieldstack));
1031	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1032	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1033	SvREFCNT_dec (sv);
1034
1035	transfer (aTHX_ prev, next, 0);
1036		1102
1037	MODULE = Coro::State PACKAGE = Coro	1103	MODULE = Coro::State PACKAGE = Coro
1038		1104
1039	BOOT:	1105	BOOT:
1040	{	1106	{
1041	int i;	1107	int i;
		1108
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1109	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1110
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1111	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1112	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1113	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1114	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1115	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1116	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050		1117
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1118	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1119	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053		1120
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1121	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1067	sv_setiv (sv, (IV)&coroapi);	1134	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on (sv);	1135	SvREADONLY_on (sv);
1069	}	1136	}
1070	}	1137	}
1071		1138
1072	#if !PERL_MICRO	1139	int
		1140	prio (Coro::State coro, int newprio = 0)
		1141	ALIAS:
		1142	nice = 1
		1143	CODE:
		1144	{
		1145	RETVAL = coro->prio;
		1146
		1147	if (items > 1)
		1148	{
		1149	if (ix)
		1150	newprio += coro->prio;
		1151
		1152	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1153	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1154
		1155	coro->prio = newprio;
		1156	}
		1157	}
1073		1158
1074	void	1159	void
1075	ready(self)	1160	ready (SV *self)
1076	SV * self
1077	PROTOTYPE: $	1161	PROTOTYPE: $
1078	CODE:	1162	CODE:
1079	api_ready (self);	1163	api_ready (self);
1080		1164
1081	#endif
1082
1083	int	1165	int
1084	nready(...)	1166	nready (...)
1085	PROTOTYPE:	1167	PROTOTYPE:
1086	CODE:	1168	CODE:
1087	RETVAL = coro_nready;	1169	RETVAL = coro_nready;
1088	OUTPUT:	1170	OUTPUT:
1089	RETVAL	1171	RETVAL
1090		1172
1091	void	1173	MODULE = Coro::State PACKAGE = Coro::AIO
1092	schedule(...)
1093	PROTOTYPE:
1094	CODE:
1095	api_schedule ();
1096		1174
1097	void
1098	cede(...)
1099	PROTOTYPE:
1100	CODE:
1101	api_cede ();
1102
1103	# and these are hacks
1104	SV *	1175	SV *
1105	_aio_get_state ()	1176	_get_state ()
1106	CODE:	1177	CODE:
1107	{	1178	{
1108	struct {	1179	struct {
1109	int errorno;	1180	int errorno;
1110	int laststype;	1181	int laststype;
…		…
1121	}	1192	}
1122	OUTPUT:	1193	OUTPUT:
1123	RETVAL	1194	RETVAL
1124		1195
1125	void	1196	void
1126	_aio_set_state (char *data_)	1197	_set_state (char *data_)
1127	PROTOTYPE: $	1198	PROTOTYPE: $
1128	CODE:	1199	CODE:
1129	{	1200	{
1130	struct {	1201	struct {
1131	int errorno;	1202	int errorno;

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