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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.86 by root, Fri Nov 24 11:36:57 2006 UTC vs.
Revision 1.113 by root, Thu Nov 30 20:54:24 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	int inuse;
		125
		126	#if USE_VALGRIND
		127	int valgrind_id;
		128	#endif
		129	} coro_cctx;
		130
		131	enum {
		132	CF_RUNNING, /* coroutine is running */
		133	CF_READY, /* coroutine is ready */
		134	};
		135
		136	/* this is a structure representing a perl-level coroutine */
104	struct coro {	137	struct coro {
105	/* the optional C context */	138	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	139	coro_cctx *cctx;
107	void *cursp;	140
		141	/* data associated with this coroutine (initial args) */
		142	AV *args;
108	int gencnt;	143	int refcnt;
		144	int flags;
109		145
110	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
111	AV *defav;	147	AV *defav;
112	SV *defsv;	148	SV *defsv;
113	SV *errsv;	149	SV *errsv;
114		150
115	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
116	U8 dowarn;	152	# include "state.h"
117	I32 in_eval;	153	#undef VAR
118		154
119	/* the stacks and related info (callchain etc..) */	155	/* coro process data */
120	PERL_SI *curstackinfo;	156	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	};	157	};
153		158
154	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
156		161
157	static AV *	162	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	163	coro_clone_padlist (CV *cv)
159	{	164	{
160	AV *padlist = CvPADLIST (cv);	165	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	166	AV *newpadlist, *newpad;
162		167
163	newpadlist = newAV ();	168	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	170	#if PERL_VERSION_ATLEAST (5,9,0)
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		172	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	174	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	176	--AvFILLp (padlist);
172		177
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
175		180
176	return newpadlist;	181	return newpadlist;
177	}	182	}
178		183
179	static void	184	static void
180	free_padlist (pTHX_ AV *padlist)	185	free_padlist (AV *padlist)
181	{	186	{
182	/* may be during global destruction */	187	/* may be during global destruction */
183	if (SvREFCNT (padlist))	188	if (SvREFCNT (padlist))
184	{	189	{
185	I32 i = AvFILLp (padlist);	190	I32 i = AvFILLp (padlist);
…		…
206	AV *padlist;	211	AV *padlist;
207	AV *av = (AV *)mg->mg_obj;	212	AV *av = (AV *)mg->mg_obj;
208		213
209	/* casting is fun. */	214	/* casting is fun. */
210	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	free_padlist (aTHX_ padlist);	216	free_padlist (padlist);
212		217
213	SvREFCNT_dec (av);	218	SvREFCNT_dec (av);
214		219
215	return 0;	220	return 0;
216	}	221	}
217		222
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		224
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		226
		227	#define CORO_MAGIC(cv) \
		228	SvMAGIC (cv) \
		229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		230	? SvMAGIC (cv) \
		231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		232	: 0
		233
222	/* the next two functions merely cache the padlists */	234	/* the next two functions merely cache the padlists */
223	static void	235	static void
224	get_padlist (pTHX_ CV *cv)	236	get_padlist (CV *cv)
225	{	237	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
227		240
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	243	else
231	{	244	{
232	#if 0	245	#if 0
233	/* this should work - but it doesn't :( */	246	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	247	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	248	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	249	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	250	SvREFCNT_dec (cp);
238	#else	251	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	252	CvPADLIST (cv) = coro_clone_padlist (cv);
240	#endif	253	#endif
241	}	254	}
242	}	255	}
243		256
244	static void	257	static void
245	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
246	{	259	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
248		262
249	if (!mg)	263	if (!mg)
250	{	264	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	267	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	268	mg->mg_obj = (SV *)newAV ();
255	}	269	}
256		270
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	271	av = (AV *)mg->mg_obj;
		272
		273	if (AvFILLp (av) >= AvMAX (av))
		274	av_extend (av, AvMAX (av) + 1);
		275
		276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
258	}	277	}
259		278
260	#define SB do {	279	#define SB do {
261	#define SE } while (0)	280	#define SE } while (0)
262		281
263	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
265		284
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
267		286
268	static void	287	static void
269	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
270	{	289	{
271	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	291	# include "state.h"
273		292	#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		293
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		297
…		…
312	CV *cv;	300	CV *cv;
313		301
314	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
316	{	304	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
323	}	307	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	308	}
327		309
328	PUTBACK;	310	PUTBACK;
329	}	311	}
330	}	312	}
331		313
332	static void	314	static void
333	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
334	{	316	{
335	{	317	{
336	dSP;	318	dSP;
337	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
352	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
353		335
354	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
355	{	337	{
356	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
357	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
358	{	341	{
359	EXTEND (SP, CvDEPTH(cv)*2);	342	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		343
368	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
370		347
		348	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	349	get_padlist (cv);
372	}	350	}
373	}	351	}
374	#ifdef CXt_FORMAT	352	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
376	{	354	{
…		…
394		372
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
398		376
399	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	378	# include "state.h"
401		379	#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	}	380	}
434		381
435	/*	382	/*
436	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	385	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	386	* not usually need a lot of stackspace.
440	*/	387	*/
441	static void	388	static void
442	coro_init_stacks (pTHX)	389	coro_init_stacks ()
443	{	390	{
444	LOCK;
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		395
…		…
471		416
472	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
473	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	419	PL_savestack_max = 96;
475		420
476	#if PERL_VERSION < 9	421	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
478	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	424	PL_retstack_max = 8;
480	#endif	425	#endif
481
482	UNLOCK;
483	}	426	}
484		427
485	/*	428	/*
486	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
487	*/	430	*/
488	static void	431	static void
489	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
490	{	433	{
491	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
492	{	435	{
493	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);	437	LEAVE_SCOPE (0);
…		…
525		468
526	Safefree (PL_tmps_stack);	469	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	470	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	471	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	472	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	473	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	474	Safefree (PL_retstack);
532	#endif	475	#endif
533	}	476	}
534		477
535	static void	478	static void
536	allocate_stack (Coro__State ctx, int alloc)	479	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	{	480	{
598	/*	481	/*
599	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
600	*/	483	*/
601	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		484
606	coro_init_stacks (aTHX);	485	coro_init_stacks ();
		486
607	/*PL_curcop = 0;*/	487	PL_curcop = 0;
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */	488	PL_in_eval = 0;
		489	PL_curpm = 0;
		490
		491	{
		492	dSP;
		493	LOGOP myop;
		494
		495	/* I have no idea why this is needed, but it is */
		496	PUSHMARK (SP);
		497
609	SvREFCNT_dec (GvAV (PL_defgv));	498	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	499	GvAV (PL_defgv) = coro->args; coro->args = 0;
611		500
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);	501	Zero (&myop, 1, LOGOP);
632	myop.op_next = Nullop;	502	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	503	myop.op_flags = OPf_WANT_VOID;
634		504
635	PL_op = (OP *)&myop;	505	PL_op = (OP *)&myop;
636		506
637	PUSHMARK(SP);	507	PUSHMARK (SP);
638	XPUSHs (sub_init);	508	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;	509	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;	511	SPAGAIN;
649		512
650	ENTER; /* necessary e.g. for dounwind */	513	ENTER; /* necessary e.g. for dounwind */
651	}	514	}
652	}	515	}
653		516
654	static void	517	static void
655	continue_coro (void *arg)	518	free_coro_mortal ()
656	{	519	{
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	/* never call directly, always through the coro_state_transfer global variable */
673	static void
674	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
675	{
676	dSTACKLEVEL;
677
678	if (prev != next)
679	{
680	/* has this coro been created yet? */
681	if (next->mainstack)
682	{
683	LOCK;
684	SAVE (prev, flags);
685	LOAD (next);
686	UNLOCK;
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	prev->cursp = stacklevel;
716	/* don't add any code here */
717	}
718	else
719	next->cursp = stacklevel;
720	}
721	else if (next->tmps_ix == -2)
722	croak ("tried to transfer to running coroutine");
723	else
724	{
725	LOCK;
726	SAVE (prev, -1); /* first get rid of the old state */
727	UNLOCK;
728
729	/* create the coroutine for the first time */
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	/* the new coroutine starts with start_env again */
736	PL_top_env = &PL_start_env;
737
738	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739	{
740	setup_coro (next);
741	next->cursp = stacklevel;
742
743	prev->stack->refcnt++;
744	prev->stack->usecnt++;
745	next->stack = prev->stack;
746	next->gencnt = prev->gencnt;
747	}
748	else
749	{
750	assert (!next->stack);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	setup_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756	prev->cursp = stacklevel;
757	/* don't add any code here */
758	}
759	}
760	else
761	{
762	setup_coro (next);
763	next->cursp = stacklevel;
764	}
765	}
766	}
767
768	LOCK;
769	if (coro_mortal)	520	if (coro_mortal)
770	{	521	{
771	SvREFCNT_dec (coro_mortal);	522	SvREFCNT_dec (coro_mortal);
772	coro_mortal = 0;	523	coro_mortal = 0;
773	}	524	}
		525	}
		526
		527	static void NOINLINE
		528	prepare_cctx (coro_cctx *cctx)
		529	{
		530	dSP;
		531	LOGOP myop;
		532
		533	Zero (&myop, 1, LOGOP);
		534	myop.op_next = PL_op;
		535	myop.op_flags = OPf_WANT_VOID;
		536
		537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		538
		539	PUSHMARK (SP);
		540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		541	PUTBACK;
		542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		543	SPAGAIN;
		544	}
		545
		546	static void
		547	coro_run (void *arg)
		548	{
		549	/* coro_run is the alternative epilogue of transfer() */
774	UNLOCK;	550	UNLOCK;
775	}
776		551
777	/* use this function pointer to call the above function */	552	/*
778	/* this is done to increase chances of the compiler not inlining the call */	553	* this is a _very_ stripped down perl interpreter ;)
779	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	554	*/
		555	PL_top_env = &PL_start_env;
780		556
781	#define SV_CORO(sv,func) \	557	/* inject call to cctx_init */
782	do { \	558	prepare_cctx ((coro_cctx *)arg);
783	if (SvROK (sv)) \
784	sv = SvRV (sv); \
785	\
786	if (SvTYPE (sv) == SVt_PVHV) \
787	{ \
788	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
789	\
790	if (!he) \
791	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
792	\
793	(sv) = SvRV (HeVAL(he)); \
794	} \
795	\
796	/* must also be changed inside Coro::Cont::yield */ \
797	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
798	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
799	\
800	} while(0)
801		559
802	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))	560	/* somebody will hit me for both perl_run and PL_restartop */
		561	perl_run (PL_curinterp);
803		562
		563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		564	abort ();
		565	}
		566
		567	static coro_cctx *
		568	cctx_new ()
		569	{
		570	coro_cctx *cctx;
		571
		572	++cctx_count;
		573
		574	New (0, cctx, 1, coro_cctx);
		575
		576	#if HAVE_MMAP
		577
		578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		579	/* mmap suppsedly does allocate-on-write for us */
		580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		581
		582	if (cctx->sptr == (void *)-1)
		583	{
		584	perror ("FATAL: unable to mmap stack for coroutine");
		585	_exit (EXIT_FAILURE);
		586	}
		587
		588	# if STACKGUARD
		589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		590	# endif
		591
		592	#else
		593
		594	cctx->ssize = STACKSIZE * (long)sizeof (long);
		595	New (0, cctx->sptr, STACKSIZE, long);
		596
		597	if (!cctx->sptr)
		598	{
		599	perror ("FATAL: unable to malloc stack for coroutine");
		600	_exit (EXIT_FAILURE);
		601	}
		602
		603	#endif
		604
		605	#if USE_VALGRIND
		606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		608	cctx->ssize + (char *)cctx->sptr
		609	);
		610	#endif
		611
		612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		613
		614	return cctx;
		615	}
		616
		617	static void
		618	cctx_free (coro_cctx *cctx)
		619	{
		620	if (!cctx)
		621	return;
		622
		623	--cctx_count;
		624
		625	#if USE_VALGRIND
		626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		627	#endif
		628
		629	#if HAVE_MMAP
		630	munmap (cctx->sptr, cctx->ssize);
		631	#else
		632	Safefree (cctx->sptr);
		633	#endif
		634
		635	Safefree (cctx);
		636	}
		637
		638	static coro_cctx *
		639	cctx_get ()
		640	{
		641	coro_cctx *cctx;
		642
		643	if (cctx_first)
		644	{
		645	--cctx_idle;
		646	cctx = cctx_first;
		647	cctx_first = cctx->next;
		648	}
		649	else
		650	{
		651	cctx = cctx_new ();
		652	PL_op = PL_op->op_next;
		653	}
		654
		655	return cctx;
		656	}
		657
		658	static void
		659	cctx_put (coro_cctx *cctx)
		660	{
		661	++cctx_idle;
		662	cctx->next = cctx_first;
		663	cctx_first = cctx;
		664	}
		665
		666	/* never call directly, always through the coro_state_transfer global variable */
		667	static void NOINLINE
		668	transfer (struct coro *prev, struct coro *next, int flags)
		669	{
		670	dSTACKLEVEL;
		671
		672	/* sometimes transfer is only called to set idle_sp */
		673	if (flags == TRANSFER_SET_STACKLEVEL)
		674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		675	else if (prev != next)
		676	{
		677	coro_cctx *prev__cctx;
		678
		679	if (!prev->cctx)
		680	{
		681	/* create a new empty context */
		682	Newz (0, prev->cctx, 1, coro_cctx);
		683	prev->cctx->inuse = 1;
		684	prev->flags |= CF_RUNNING;
		685	}
		686
		687	if (!prev->flags & CF_RUNNING)
		688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		689
		690	if (next->flags & CF_RUNNING)
		691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		692
		693	prev->flags &= ~CF_RUNNING;
		694	next->flags |= CF_RUNNING;
		695
		696	LOCK;
		697
		698	if (next->mainstack)
		699	{
		700	/* coroutine already started */
		701	SAVE (prev, flags);
		702	LOAD (next);
		703	}
		704	else
		705	{
		706	/* need to start coroutine */
		707	/* first get rid of the old state */
		708	SAVE (prev, -1);
		709	/* setup coroutine call */
		710	setup_coro (next);
		711	/* need a new stack */
		712	assert (!next->stack);
		713	}
		714
		715	prev__cctx = prev->cctx;
		716
		717	/* possibly "free" the cctx */
		718	if (prev__cctx->idle_sp == STACKLEVEL)
		719	{
		720	assert (PL_top_env == prev__cctx->top_env);
		721
		722	cctx_put (prev__cctx);
		723	prev->cctx = 0;
		724	}
		725	else if (prev__cctx->idle_sp) //D
		726	fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D
		727
		728	if (!next->cctx)
		729	next->cctx = cctx_get ();
		730
		731	if (prev__cctx != next->cctx)
		732	{
		733	assert ( prev__cctx->inuse);
		734	assert (!next->cctx->inuse);
		735
		736	prev__cctx->inuse = 0;
		737	next->cctx->inuse = 1;
		738
		739	prev__cctx->top_env = PL_top_env;
		740	PL_top_env = next->cctx->top_env;
		741	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		742	}
		743
		744	free_coro_mortal ();
		745
		746	UNLOCK;
		747	}
		748	}
		749
		750	struct transfer_args
		751	{
		752	struct coro *prev, *next;
		753	int flags;
		754	};
		755
		756	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		757
		758	static void
		759	coro_state_destroy (struct coro *coro)
		760	{
		761	if (coro->refcnt--)
		762	return;
		763
		764	if (coro->flags & CF_RUNNING)
		765	croak ("FATAL: tried to destroy currently running coroutine");
		766
		767	if (coro->mainstack && coro->mainstack != main_mainstack)
		768	{
		769	struct coro temp;
		770
		771	SAVE ((&temp), TRANSFER_SAVE_ALL);
		772	LOAD (coro);
		773
		774	coro_destroy_stacks ();
		775
		776	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		777
		778	coro->mainstack = 0;
		779	}
		780
		781	cctx_free (coro->cctx);
		782	SvREFCNT_dec (coro->args);
		783	Safefree (coro);
		784	}
		785
804	static void	786	static int
		787	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		788	{
		789	struct coro *coro = (struct coro *)mg->mg_ptr;
		790	mg->mg_ptr = 0;
		791
		792	coro_state_destroy (coro);
		793
		794	return 0;
		795	}
		796
		797	static int
		798	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		799	{
		800	struct coro *coro = (struct coro *)mg->mg_ptr;
		801
		802	++coro->refcnt;
		803
		804	return 0;
		805	}
		806
		807	static MGVTBL coro_state_vtbl = {
		808	0, 0, 0, 0,
		809	coro_state_clear,
		810	0,
		811	#ifdef MGf_DUP
		812	coro_state_dup,
		813	#else
		814	# define MGf_DUP 0
		815	#endif
		816	};
		817
		818	static struct coro *
		819	SvSTATE (SV *coro)
		820	{
		821	HV *stash;
		822	MAGIC *mg;
		823
		824	if (SvROK (coro))
		825	coro = SvRV (coro);
		826
		827	stash = SvSTASH (coro);
		828	if (stash != coro_stash && stash != coro_state_stash)
		829	{
		830	/* very slow, but rare, check */
		831	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		832	croak ("Coro::State object required");
		833	}
		834
		835	mg = SvMAGIC (coro);
		836	assert (mg->mg_type == PERL_MAGIC_ext);
		837	return (struct coro *)mg->mg_ptr;
		838	}
		839
		840	static void
		841	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		842	{
		843	ta->prev = SvSTATE (prev);
		844	ta->next = SvSTATE (next);
		845	ta->flags = flags;
		846	}
		847
		848	static void
805	api_transfer (pTHX_ SV *prev, SV *next, int flags)	849	api_transfer (SV *prev, SV *next, int flags)
806	{	850	{
807	SV_CORO (prev, "Coro::transfer");	851	dTHX;
808	SV_CORO (next, "Coro::transfer");	852	struct transfer_args ta;
809		853
810	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	854	prepare_transfer (&ta, prev, next, flags);
		855	TRANSFER (ta);
811	}	856	}
812		857
813	/** Coro ********************************************************************/	858	/** Coro ********************************************************************/
814		859
815	#define PRIO_MAX 3	860	#define PRIO_MAX 3
…		…
823	static GV *coro_current, *coro_idle;	868	static GV *coro_current, *coro_idle;
824	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
825	static int coro_nready;	870	static int coro_nready;
826		871
827	static void	872	static void
828	coro_enq (pTHX_ SV *sv)	873	coro_enq (SV *coro_sv)
829	{	874	{
830	SV **xprio;
831	int prio;
832
833	if (SvTYPE (sv) != SVt_PVHV)
834	croak ("Coro::ready tried to enqueue something that is not a coroutine");
835
836	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
837	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
838
839	prio = prio > PRIO_MAX ? PRIO_MAX
840	: prio < PRIO_MIN ? PRIO_MIN
841	: prio;
842
843	av_push (coro_ready [prio - PRIO_MIN], sv);	875	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
844	coro_nready++;	876	coro_nready++;
845	}	877	}
846		878
847	static SV *	879	static SV *
848	coro_deq (pTHX_ int min_prio)	880	coro_deq (int min_prio)
849	{	881	{
850	int prio = PRIO_MAX - PRIO_MIN;	882	int prio = PRIO_MAX - PRIO_MIN;
851		883
852	min_prio -= PRIO_MIN;	884	min_prio -= PRIO_MIN;
853	if (min_prio < 0)	885	if (min_prio < 0)
…		…
861	}	893	}
862		894
863	return 0;	895	return 0;
864	}	896	}
865		897
866	static void	898	static int
867	api_ready (SV *coro)	899	api_ready (SV *coro_sv)
		900	{
		901	struct coro *coro;
		902
		903	if (SvROK (coro_sv))
		904	coro_sv = SvRV (coro_sv);
		905
		906	coro = SvSTATE (coro_sv);
		907
		908	if (coro->flags & CF_READY)
		909	return 0;
		910
		911	if (coro->flags & CF_RUNNING)
		912	croak ("Coro::ready called on currently running coroutine");
		913
		914	coro->flags |= CF_READY;
		915
		916	LOCK;
		917	coro_enq (SvREFCNT_inc (coro_sv));
		918	UNLOCK;
		919
		920	return 1;
		921	}
		922
		923	static int
		924	api_is_ready (SV *coro_sv)
		925	{
		926	return !!SvSTATE (coro_sv)->flags & CF_READY;
		927	}
		928
		929	static void
		930	prepare_schedule (struct transfer_args *ta)
		931	{
		932	SV *current, *prev, *next;
		933
		934	current = GvSV (coro_current);
		935
		936	for (;;)
		937	{
		938	LOCK;
		939	next = coro_deq (PRIO_MIN);
		940	UNLOCK;
		941
		942	if (next)
		943	break;
		944
		945	{
		946	dSP;
		947
		948	ENTER;
		949	SAVETMPS;
		950
		951	PUSHMARK (SP);
		952	PUTBACK;
		953	call_sv (GvSV (coro_idle), G_DISCARD);
		954
		955	FREETMPS;
		956	LEAVE;
		957	}
		958	}
		959
		960	prev = SvRV (current);
		961	SvRV (current) = next;
		962
		963	/* free this only after the transfer */
		964	LOCK;
		965	free_coro_mortal ();
		966	UNLOCK;
		967	coro_mortal = prev;
		968
		969	ta->prev = SvSTATE (prev);
		970	ta->next = SvSTATE (next);
		971	ta->flags = TRANSFER_SAVE_ALL;
		972
		973	ta->next->flags &= ~CF_READY;
		974	}
		975
		976	static void
		977	prepare_cede (struct transfer_args *ta)
		978	{
		979	api_ready (GvSV (coro_current));
		980
		981	prepare_schedule (ta);
		982	}
		983
		984	static void
		985	api_schedule (void)
868	{	986	{
869	dTHX;	987	dTHX;
		988	struct transfer_args ta;
870		989
871	if (SvROK (coro))	990	prepare_schedule (&ta);
872	coro = SvRV (coro);	991	TRANSFER (ta);
873
874	LOCK;
875	coro_enq (aTHX_ SvREFCNT_inc (coro));
876	UNLOCK;
877	}	992	}
878		993
879	static void	994	static void
880	api_schedule (void)	995	api_cede (void)
881	{	996	{
882	dTHX;	997	dTHX;
		998	struct transfer_args ta;
883		999
884	SV *prev, *next;	1000	prepare_cede (&ta);
885		1001	TRANSFER (ta);
886	LOCK;
887
888	prev = SvRV (GvSV (coro_current));
889	next = coro_deq (aTHX_ PRIO_MIN);
890
891	if (!next)
892	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
893
894	/* free this only after the transfer */
895	coro_mortal = prev;
896	SV_CORO (prev, "Coro::schedule");
897
898	SvRV (GvSV (coro_current)) = next;
899
900	SV_CORO (next, "Coro::schedule");
901
902	UNLOCK;
903
904	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
905	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
906	}
907
908	static void
909	api_cede (void)
910	{
911	dTHX;
912
913	LOCK;
914	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
915	UNLOCK;
916
917	api_schedule ();
918	}	1002	}
919		1003
920	MODULE = Coro::State PACKAGE = Coro::State	1004	MODULE = Coro::State PACKAGE = Coro::State
921		1005
922	PROTOTYPES: ENABLE	1006	PROTOTYPES: DISABLE
923		1007
924	BOOT:	1008	BOOT:
925	{ /* {} necessary for stoopid perl-5.6.x */	1009	{
926	#ifdef USE_ITHREADS	1010	#ifdef USE_ITHREADS
927	MUTEX_INIT (&coro_mutex);	1011	MUTEX_INIT (&coro_mutex);
928	#endif	1012	#endif
929	BOOT_PAGESIZE;	1013	BOOT_PAGESIZE;
930		1014
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1015	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		1016
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1017	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1018	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1019	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
939		1020
940	main_mainstack = PL_mainstack;	1021	main_mainstack = PL_mainstack;
941		1022
942	coroapi.ver = CORO_API_VERSION;	1023	coroapi.ver = CORO_API_VERSION;
943	coroapi.transfer = api_transfer;	1024	coroapi.transfer = api_transfer;
944	}
945		1025
946	Coro::State	1026	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1027	}
		1028
		1029	SV *
947	new (char *klass, ...)	1030	new (char *klass, ...)
948	PROTOTYPE: $@
949	CODE:	1031	CODE:
950	{	1032	{
951	Coro__State coro;	1033	struct coro *coro;
		1034	HV *hv;
952	int i;	1035	int i;
953
954	if (!SvOK (ST (1)))
955	croak ("Coro::State::new needs something callable as first argument");
956		1036
957	Newz (0, coro, 1, struct coro);	1037	Newz (0, coro, 1, struct coro);
958	coro->args = newAV ();	1038	coro->args = newAV ();
959		1039
		1040	hv = newHV ();
		1041	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1042	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1043
960	for (i = 1; i < items; i++)	1044	for (i = 1; i < items; i++)
961	av_push (coro->args, newSVsv (ST (i)));	1045	av_push (coro->args, newSVsv (ST (i)));
962
963	RETVAL = coro;
964
965	/*coro->mainstack = 0; *//*actual work is done inside transfer */
966	/*coro->stack = 0;*/
967	}	1046	}
968	OUTPUT:	1047	OUTPUT:
969	RETVAL	1048	RETVAL
970		1049
971	void	1050	void
972	transfer(prev, next, flags)	1051	_set_stacklevel (...)
973	SV *prev	1052	ALIAS:
974	SV *next	1053	Coro::State::transfer = 1
975	int flags	1054	Coro::schedule = 2
976	PROTOTYPE: @	1055	Coro::cede = 3
		1056	Coro::Cont::yield = 4
977	CODE:	1057	CODE:
978	PUTBACK;	1058	{
979	SV_CORO (next, "Coro::transfer");	1059	struct transfer_args ta;
980	SV_CORO (prev, "Coro::transfer");	1060
981	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1061	switch (ix)
982	SPAGAIN;	1062	{
		1063	case 0:
		1064	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1065	ta.next = 0;
		1066	ta.flags = TRANSFER_SET_STACKLEVEL;
		1067	break;
		1068
		1069	case 1:
		1070	if (items != 3)
		1071	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1072
		1073	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1074	break;
		1075
		1076	case 2:
		1077	prepare_schedule (&ta);
		1078	break;
		1079
		1080	case 3:
		1081	prepare_cede (&ta);
		1082	break;
		1083
		1084	case 4:
		1085	{
		1086	SV *yieldstack;
		1087	SV *sv;
		1088	AV *defav = GvAV (PL_defgv);
		1089
		1090	yieldstack = *hv_fetch (
		1091	(HV *)SvRV (GvSV (coro_current)),
		1092	"yieldstack", sizeof ("yieldstack") - 1,
		1093	0
		1094	);
		1095
		1096	/* set up @_ -- ugly */
		1097	av_clear (defav);
		1098	av_fill (defav, items - 1);
		1099	while (items--)
		1100	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1101
		1102	sv = av_pop ((AV *)SvRV (yieldstack));
		1103	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1104	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1105	ta.flags = 0;
		1106	SvREFCNT_dec (sv);
		1107	}
		1108	break;
		1109
		1110	}
		1111
		1112	TRANSFER (ta);
		1113	}
983		1114
984	void	1115	void
985	DESTROY(coro)	1116	_clone_state_from (SV *dst, SV *src)
986	Coro::State coro	1117	CODE:
987	CODE:	1118	{
		1119	struct coro *coro_src = SvSTATE (src);
988		1120
989	if (coro->mainstack && coro->mainstack != main_mainstack)	1121	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
990	{
991	struct coro temp;
992		1122
993	PUTBACK;	1123	++coro_src->refcnt;
994	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1124	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
995	LOAD (aTHX_ coro);	1125	}
996	SPAGAIN;
997
998	destroy_stacks (aTHX);
999
1000	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1001	SPAGAIN;
1002
1003	coro->mainstack = 0;
1004	}
1005
1006	deallocate_stack (coro);
1007	SvREFCNT_dec (coro->args);
1008	Safefree (coro);
1009		1126
1010	void	1127	void
1011	_exit(code)	1128	_exit (code)
1012	int code	1129	int code
1013	PROTOTYPE: $	1130	PROTOTYPE: $
1014	CODE:	1131	CODE:
1015	_exit (code);	1132	_exit (code);
1016		1133
1017	MODULE = Coro::State PACKAGE = Coro::Cont	1134	int
		1135	cctx_count ()
		1136	CODE:
		1137	RETVAL = cctx_count;
		1138	OUTPUT:
		1139	RETVAL
1018		1140
1019	void	1141	int
1020	yield(...)	1142	cctx_idle ()
1021	PROTOTYPE: @	1143	CODE:
1022	CODE:	1144	RETVAL = cctx_idle;
1023	SV *yieldstack;	1145	OUTPUT:
1024	SV *sv;	1146	RETVAL
1025	AV *defav = GvAV (PL_defgv);
1026	struct coro *prev, *next;
1027
1028	yieldstack = *hv_fetch (
1029	(HV *)SvRV (GvSV (coro_current)),
1030	"yieldstack", sizeof ("yieldstack") - 1,
1031	0
1032	);
1033
1034	/* set up @_ -- ugly */
1035	av_clear (defav);
1036	av_fill (defav, items - 1);
1037	while (items--)
1038	av_store (defav, items, SvREFCNT_inc (ST(items)));
1039
1040	sv = av_pop ((AV *)SvRV (yieldstack));
1041	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1042	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1043	SvREFCNT_dec (sv);
1044
1045	coro_state_transfer (aTHX_ prev, next, 0);
1046		1147
1047	MODULE = Coro::State PACKAGE = Coro	1148	MODULE = Coro::State PACKAGE = Coro
1048		1149
1049	BOOT:	1150	BOOT:
1050	{	1151	{
1051	int i;	1152	int i;
		1153
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1154	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1155
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1156	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1157	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1158	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1159	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1160	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1161	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060		1162
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1163	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1164	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1165
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1166	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1068	SV *sv = perl_get_sv("Coro::API", 1);	1170	SV *sv = perl_get_sv("Coro::API", 1);
1069		1171
1070	coroapi.schedule = api_schedule;	1172	coroapi.schedule = api_schedule;
1071	coroapi.cede = api_cede;	1173	coroapi.cede = api_cede;
1072	coroapi.ready = api_ready;	1174	coroapi.ready = api_ready;
		1175	coroapi.is_ready = api_is_ready;
1073	coroapi.nready = &coro_nready;	1176	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1177	coroapi.current = coro_current;
1075		1178
1076	GCoroAPI = &coroapi;	1179	GCoroAPI = &coroapi;
1077	sv_setiv (sv, (IV)&coroapi);	1180	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on (sv);	1181	SvREADONLY_on (sv);
1079	}	1182	}
1080	}	1183	}
1081		1184
1082	#if !PERL_MICRO	1185	int
		1186	prio (Coro::State coro, int newprio = 0)
		1187	ALIAS:
		1188	nice = 1
		1189	CODE:
		1190	{
		1191	RETVAL = coro->prio;
1083		1192
1084	void	1193	if (items > 1)
		1194	{
		1195	if (ix)
		1196	newprio += coro->prio;
		1197
		1198	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1199	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1200
		1201	coro->prio = newprio;
		1202	}
		1203	}
		1204
		1205	SV *
1085	ready(self)	1206	ready (SV *self)
1086	SV * self
1087	PROTOTYPE: $	1207	PROTOTYPE: $
1088	CODE:	1208	CODE:
1089	api_ready (self);	1209	RETVAL = boolSV (api_ready (self));
		1210	OUTPUT:
		1211	RETVAL
1090		1212
1091	#endif	1213	SV *
		1214	is_ready (SV *self)
		1215	PROTOTYPE: $
		1216	CODE:
		1217	RETVAL = boolSV (api_is_ready (self));
		1218	OUTPUT:
		1219	RETVAL
1092		1220
1093	int	1221	int
1094	nready(...)	1222	nready (...)
1095	PROTOTYPE:	1223	PROTOTYPE:
1096	CODE:	1224	CODE:
1097	RETVAL = coro_nready;	1225	RETVAL = coro_nready;
1098	OUTPUT:	1226	OUTPUT:
1099	RETVAL	1227	RETVAL
1100		1228
1101	void	1229	MODULE = Coro::State PACKAGE = Coro::AIO
1102	schedule(...)
1103	PROTOTYPE:
1104	CODE:
1105	api_schedule ();
1106		1230
1107	void
1108	cede(...)
1109	PROTOTYPE:
1110	CODE:
1111	api_cede ();
1112
1113	# and these are hacks
1114	SV *	1231	SV *
1115	_aio_get_state ()	1232	_get_state ()
1116	CODE:	1233	CODE:
1117	{	1234	{
1118	struct {	1235	struct {
1119	int errorno;	1236	int errorno;
1120	int laststype;	1237	int laststype;
…		…
1131	}	1248	}
1132	OUTPUT:	1249	OUTPUT:
1133	RETVAL	1250	RETVAL
1134		1251
1135	void	1252	void
1136	_aio_set_state (char *data_)	1253	_set_state (char *data_)
1137	PROTOTYPE: $	1254	PROTOTYPE: $
1138	CODE:	1255	CODE:
1139	{	1256	{
1140	struct {	1257	struct {
1141	int errorno;	1258	int errorno;

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