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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.85 by root, Fri Nov 24 00:32:04 2006 UTC vs.
Revision 1.115 by root, Fri Dec 1 13:36:08 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	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	|| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
14	# endif	25	# endif
15	# ifndef call_sv	26	# ifndef call_sv
16	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
29	# endif	40	# endif
30	#endif	41	#endif
31		42
		43	#include <stdio.h>
32	#include <errno.h>	44	#include <errno.h>
33		45
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	47	# undef STACKGUARD
36	#endif	48	#endif
…		…
53	# ifndef PAGESIZE	65	# ifndef PAGESIZE
54	# define PAGESIZE pagesize	66	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;	68	static long pagesize;
57	# else	69	# else
58	# define BOOT_PAGESIZE	70	# define BOOT_PAGESIZE (void)0
59	# endif	71	# endif
		72	#else
		73	# define PAGESIZE 0
		74	# define BOOT_PAGESIZE (void)0
60	#endif	75	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64		76
65	/* The next macro should declare a variable stacklevel that contains and approximation	77	/* 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	78	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
69		82
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		84
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	85	#if __GNUC__ >= 3
		86	# define attribute(x) __attribute__(x)
		87	#else
		88	# define attribute(x)
		89	#endif
		90
		91	#define NOINLINE attribute ((noinline))
73		92
74	#include "CoroAPI.h"	93	#include "CoroAPI.h"
		94
		95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
75		96
76	#ifdef USE_ITHREADS	97	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	98	static perl_mutex coro_mutex;
78	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
82	# define UNLOCK (void)0	103	# define UNLOCK (void)0
83	#endif	104	#endif
84		105
85	static struct CoroAPI coroapi;	106	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	107	static AV *main_mainstack; /* used to differentiate between $main and others */
87	static HV *coro_state_stash;	108	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 */	109	static SV *coro_mortal; /* will be freed after next transfer */
91		110
92	/* this is actually not only the c stack but also c registers etc... */	111	static struct coro_cctx *cctx_first;
		112	static int cctx_count, cctx_idle;
		113
		114	/* this is a structure representing a c-level coroutine */
93	typedef struct {	115	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	116	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		117
98	coro_context cctx;	118	/* the stack */
99
100	void *sptr;	119	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	120	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103		121
		122	/* cpu state */
		123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		124	JMPENV *top_env;
		125	coro_context cctx;
		126
		127	int inuse;
		128
		129	#if USE_VALGRIND
		130	int valgrind_id;
		131	#endif
		132	} coro_cctx;
		133
		134	enum {
		135	CF_RUNNING, /* coroutine is running */
		136	CF_READY, /* coroutine is ready */
		137	};
		138
		139	/* this is a structure representing a perl-level coroutine */
104	struct coro {	140	struct coro {
105	/* the optional C context */	141	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	142	coro_cctx *cctx;
107	void *cursp;	143
		144	/* data associated with this coroutine (initial args) */
		145	AV *args;
108	int gencnt;	146	int refcnt;
		147	int flags;
109		148
110	/* optionally saved, might be zero */	149	/* optionally saved, might be zero */
111	AV *defav;	150	AV *defav;
112	SV *defsv;	151	SV *defsv;
113	SV *errsv;	152	SV *errsv;
114		153
115	/* saved global state not related to stacks */	154	#define VAR(name,type) type name;
116	U8 dowarn;	155	# include "state.h"
117	I32 in_eval;	156	#undef VAR
118		157
119	/* the stacks and related info (callchain etc..) */	158	/* coro process data */
120	PERL_SI *curstackinfo;	159	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	};	160	};
153		161
154	typedef struct coro *Coro__State;	162	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	163	typedef struct coro *Coro__State_or_hashref;
156		164
157	static AV *	165	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	166	coro_clone_padlist (CV *cv)
159	{	167	{
160	AV *padlist = CvPADLIST (cv);	168	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	169	AV *newpadlist, *newpad;
162		170
163	newpadlist = newAV ();	171	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	172	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	173	#if PERL_VERSION_ATLEAST (5,9,0)
		174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		175	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	176	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	177	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	178	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	179	--AvFILLp (padlist);
172		180
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	181	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
175		183
176	return newpadlist;	184	return newpadlist;
177	}	185	}
178		186
179	static void	187	static void
180	free_padlist (pTHX_ AV *padlist)	188	free_padlist (AV *padlist)
181	{	189	{
182	/* may be during global destruction */	190	/* may be during global destruction */
183	if (SvREFCNT (padlist))	191	if (SvREFCNT (padlist))
184	{	192	{
185	I32 i = AvFILLp (padlist);	193	I32 i = AvFILLp (padlist);
…		…
206	AV *padlist;	214	AV *padlist;
207	AV *av = (AV *)mg->mg_obj;	215	AV *av = (AV *)mg->mg_obj;
208		216
209	/* casting is fun. */	217	/* casting is fun. */
210	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	218	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	free_padlist (aTHX_ padlist);	219	free_padlist (padlist);
212		220
213	SvREFCNT_dec (av);	221	SvREFCNT_dec (av);
214		222
215	return 0;	223	return 0;
216	}	224	}
217		225
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	226	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		227
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	228	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		229
		230	#define CORO_MAGIC(cv) \
		231	SvMAGIC (cv) \
		232	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		233	? SvMAGIC (cv) \
		234	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		235	: 0
		236
222	/* the next two functions merely cache the padlists */	237	/* the next two functions merely cache the padlists */
223	static void	238	static void
224	get_padlist (pTHX_ CV *cv)	239	get_padlist (CV *cv)
225	{	240	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	241	MAGIC *mg = CORO_MAGIC (cv);
		242	AV *av;
227		243
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	244	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	245	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	246	else
231	{	247	{
232	#if 0	248	#if 0
233	/* this should work - but it doesn't :( */	249	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	250	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	251	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	252	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	253	SvREFCNT_dec (cp);
238	#else	254	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	255	CvPADLIST (cv) = coro_clone_padlist (cv);
240	#endif	256	#endif
241	}	257	}
242	}	258	}
243		259
244	static void	260	static void
245	put_padlist (pTHX_ CV *cv)	261	put_padlist (CV *cv)
246	{	262	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	263	MAGIC *mg = CORO_MAGIC (cv);
		264	AV *av;
248		265
249	if (!mg)	266	if (!mg)
250	{	267	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	268	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	269	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	270	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	271	mg->mg_obj = (SV *)newAV ();
255	}	272	}
256		273
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	274	av = (AV *)mg->mg_obj;
		275
		276	if (AvFILLp (av) >= AvMAX (av))
		277	av_extend (av, AvMAX (av) + 1);
		278
		279	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
258	}	280	}
259		281
260	#define SB do {	282	#define SB do {
261	#define SE } while (0)	283	#define SE } while (0)
262		284
263	#define LOAD(state) load_state(aTHX_ (state));	285	#define LOAD(state) load_state((state));
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	286	#define SAVE(state,flags) save_state((state),(flags));
265		287
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	288	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
267		289
268	static void	290	static void
269	load_state(pTHX_ Coro__State c)	291	load_state(Coro__State c)
270	{	292	{
271	PL_dowarn = c->dowarn;	293	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	294	# include "state.h"
273		295	#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		296
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	297	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	298	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	299	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		300
…		…
312	CV *cv;	303	CV *cv;
313		304
314	/* now do the ugly restore mess */	305	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	306	while ((cv = (CV *)POPs))
316	{	307	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	308	put_padlist (cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	309	CvDEPTH (cv) = PTR2IV (POPs);
323	}	310	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	311	}
327		312
328	PUTBACK;	313	PUTBACK;
329	}	314	}
330	}	315	}
331		316
332	static void	317	static void
333	save_state(pTHX_ Coro__State c, int flags)	318	save_state(Coro__State c, int flags)
334	{	319	{
335	{	320	{
336	dSP;	321	dSP;
337	I32 cxix = cxstack_ix;	322	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	323	PERL_CONTEXT *ccstk = cxstack;
…		…
352	PERL_CONTEXT *cx = &ccstk[cxix--];	337	PERL_CONTEXT *cx = &ccstk[cxix--];
353		338
354	if (CxTYPE(cx) == CXt_SUB)	339	if (CxTYPE(cx) == CXt_SUB)
355	{	340	{
356	CV *cv = cx->blk_sub.cv;	341	CV *cv = cx->blk_sub.cv;
		342
357	if (CvDEPTH(cv))	343	if (CvDEPTH (cv))
358	{	344	{
359	EXTEND (SP, CvDEPTH(cv)*2);	345	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		346
368	PUSHs ((SV *)CvPADLIST(cv));	347	PUSHs ((SV *)CvPADLIST(cv));
		348	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	349	PUSHs ((SV *)cv);
370		350
		351	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	352	get_padlist (cv);
372	}	353	}
373	}	354	}
374	#ifdef CXt_FORMAT	355	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)	356	else if (CxTYPE(cx) == CXt_FORMAT)
376	{	357	{
…		…
394		375
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	376	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	377	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	378	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
398		379
399	c->dowarn = PL_dowarn;	380	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	381	# include "state.h"
401		382	#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	}	383	}
434		384
435	/*	385	/*
436	* allocate various perl stacks. This is an exact copy	386	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	387	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	388	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	389	* not usually need a lot of stackspace.
440	*/	390	*/
441	static void	391	static void
442	coro_init_stacks (pTHX)	392	coro_init_stacks ()
443	{	393	{
444	LOCK;
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	394	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	395	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	396	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	397	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		398
…		…
471		419
472	New(54,PL_savestack,96,ANY);	420	New(54,PL_savestack,96,ANY);
473	PL_savestack_ix = 0;	421	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	422	PL_savestack_max = 96;
475		423
476	#if PERL_VERSION < 9	424	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	425	New(54,PL_retstack,8,OP*);
478	PL_retstack_ix = 0;	426	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	427	PL_retstack_max = 8;
480	#endif	428	#endif
481
482	UNLOCK;
483	}	429	}
484		430
485	/*	431	/*
486	* destroy the stacks, the callchain etc...	432	* destroy the stacks, the callchain etc...
487	*/	433	*/
488	static void	434	static void
489	destroy_stacks(pTHX)	435	coro_destroy_stacks ()
490	{	436	{
491	if (!IN_DESTRUCT)	437	if (!IN_DESTRUCT)
492	{	438	{
493	/* is this ugly, I ask? */	439	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);	440	LEAVE_SCOPE (0);
…		…
525		471
526	Safefree (PL_tmps_stack);	472	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	473	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	474	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	475	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	476	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	477	Safefree (PL_retstack);
532	#endif	478	#endif
533	}	479	}
534		480
535	static void	481	static void
536	allocate_stack (Coro__State ctx, int alloc)	482	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	{	483	{
598	/*	484	/*
599	* emulate part of the perl startup here.	485	* emulate part of the perl startup here.
600	*/	486	*/
601	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		487
606	coro_init_stacks (aTHX);	488	coro_init_stacks ();
		489
607	/*PL_curcop = 0;*/	490	PL_curcop = 0;
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */	491	PL_in_eval = 0;
		492	PL_curpm = 0;
		493
		494	{
		495	dSP;
		496	LOGOP myop;
		497
		498	/* I have no idea why this is needed, but it is */
		499	PUSHMARK (SP);
		500
609	SvREFCNT_dec (GvAV (PL_defgv));	501	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	502	GvAV (PL_defgv) = coro->args; coro->args = 0;
611		503
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);	504	Zero (&myop, 1, LOGOP);
632	myop.op_next = Nullop;	505	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	506	myop.op_flags = OPf_WANT_VOID;
634		507
635	PL_op = (OP *)&myop;	508	PL_op = (OP *)&myop;
636		509
637	PUSHMARK(SP);	510	PUSHMARK (SP);
638	XPUSHs (sub_init);	511	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;	512	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	513	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;	514	SPAGAIN;
649		515
650	ENTER; /* necessary e.g. for dounwind */	516	ENTER; /* necessary e.g. for dounwind */
651	}	517	}
652	}	518	}
653		519
654	static void	520	static void
655	continue_coro (void *arg)	521	free_coro_mortal ()
656	{	522	{
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)	523	if (coro_mortal)
770	{	524	{
771	SvREFCNT_dec (coro_mortal);	525	SvREFCNT_dec (coro_mortal);
772	coro_mortal = 0;	526	coro_mortal = 0;
773	}	527	}
		528	}
		529
		530	static void NOINLINE
		531	prepare_cctx (coro_cctx *cctx)
		532	{
		533	dSP;
		534	LOGOP myop;
		535
		536	Zero (&myop, 1, LOGOP);
		537	myop.op_next = PL_op;
		538	myop.op_flags = OPf_WANT_VOID;
		539
		540	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		541
		542	PUSHMARK (SP);
		543	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		544	PUTBACK;
		545	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		546	SPAGAIN;
		547	}
		548
		549	static void
		550	coro_run (void *arg)
		551	{
		552	/* coro_run is the alternative epilogue of transfer() */
774	UNLOCK;	553	UNLOCK;
775	}
776		554
777	/* use this function pointer to call the above function */	555	/*
778	/* this is done to increase chances of the compiler not inlining the call */	556	* this is a _very_ stripped down perl interpreter ;)
779	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	557	*/
		558	PL_top_env = &PL_start_env;
780		559
781	#define SV_CORO(sv,func) \	560	/* inject call to cctx_init */
782	do { \	561	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		562
802	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))	563	/* somebody will hit me for both perl_run and PL_restartop */
		564	perl_run (PL_curinterp);
803		565
		566	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		567	abort ();
		568	}
		569
		570	static coro_cctx *
		571	cctx_new ()
		572	{
		573	coro_cctx *cctx;
		574
		575	++cctx_count;
		576
		577	New (0, cctx, 1, coro_cctx);
		578
		579	#if HAVE_MMAP
		580
		581	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		582	/* mmap suppsedly does allocate-on-write for us */
		583	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		584
		585	if (cctx->sptr == (void *)-1)
		586	{
		587	perror ("FATAL: unable to mmap stack for coroutine");
		588	_exit (EXIT_FAILURE);
		589	}
		590
		591	# if STACKGUARD
		592	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		593	# endif
		594
		595	#else
		596
		597	cctx->ssize = STACKSIZE * (long)sizeof (long);
		598	New (0, cctx->sptr, STACKSIZE, long);
		599
		600	if (!cctx->sptr)
		601	{
		602	perror ("FATAL: unable to malloc stack for coroutine");
		603	_exit (EXIT_FAILURE);
		604	}
		605
		606	#endif
		607
		608	#if USE_VALGRIND
		609	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		610	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		611	cctx->ssize + (char *)cctx->sptr
		612	);
		613	#endif
		614
		615	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		616
		617	return cctx;
		618	}
		619
		620	static void
		621	cctx_destroy (coro_cctx *cctx)
		622	{
		623	if (!cctx)
		624	return;
		625
		626	--cctx_count;
		627
		628	#if USE_VALGRIND
		629	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		630	#endif
		631
		632	#if HAVE_MMAP
		633	munmap (cctx->sptr, cctx->ssize);
		634	#else
		635	Safefree (cctx->sptr);
		636	#endif
		637
		638	Safefree (cctx);
		639	}
		640
		641	static coro_cctx *
		642	cctx_get ()
		643	{
		644	coro_cctx *cctx;
		645
		646	if (cctx_first)
		647	{
		648	cctx = cctx_first;
		649	cctx_first = cctx->next;
		650	--cctx_idle;
		651	}
		652	else
		653	{
		654	cctx = cctx_new ();
		655	PL_op = PL_op->op_next;
		656	}
		657
		658	return cctx;
		659	}
		660
		661	static void
		662	cctx_put (coro_cctx *cctx)
		663	{
		664	/* free another cctx if overlimit */
		665	if (cctx_idle >= MAX_IDLE_CCTX)
		666	{
		667	coro_cctx *first = cctx_first;
		668	cctx_first = first->next;
		669	--cctx_idle;
		670
		671	assert (!first->inuse);
		672	cctx_destroy (first);
		673	}
		674
		675	++cctx_idle;
		676	cctx->next = cctx_first;
		677	cctx_first = cctx;
		678	}
		679
		680	/* never call directly, always through the coro_state_transfer global variable */
		681	static void NOINLINE
		682	transfer (struct coro *prev, struct coro *next, int flags)
		683	{
		684	dSTACKLEVEL;
		685
		686	/* sometimes transfer is only called to set idle_sp */
		687	if (flags == TRANSFER_SET_STACKLEVEL)
		688	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		689	else if (prev != next)
		690	{
		691	coro_cctx *prev__cctx;
		692
		693	if (!prev->cctx)
		694	{
		695	/* create a new empty context */
		696	Newz (0, prev->cctx, 1, coro_cctx);
		697	prev->cctx->inuse = 1;
		698	prev->flags |= CF_RUNNING;
		699	}
		700
		701	if (!prev->flags & CF_RUNNING)
		702	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		703
		704	if (next->flags & CF_RUNNING)
		705	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		706
		707	prev->flags &= ~CF_RUNNING;
		708	next->flags |= CF_RUNNING;
		709
		710	LOCK;
		711
		712	if (next->mainstack)
		713	{
		714	/* coroutine already started */
		715	SAVE (prev, flags);
		716	LOAD (next);
		717	}
		718	else
		719	{
		720	/* need to start coroutine */
		721	/* first get rid of the old state */
		722	SAVE (prev, -1);
		723	/* setup coroutine call */
		724	setup_coro (next);
		725	/* need a new stack */
		726	assert (!next->stack);
		727	}
		728
		729	prev__cctx = prev->cctx;
		730
		731	/* possibly "free" the cctx */
		732	if (prev__cctx->idle_sp == STACKLEVEL)
		733	{
		734	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		735	assert (PL_top_env == prev__cctx->top_env);
		736
		737	cctx_put (prev__cctx);
		738	prev->cctx = 0;
		739	}
		740
		741	if (!next->cctx)
		742	next->cctx = cctx_get ();
		743
		744	if (prev__cctx != next->cctx)
		745	{
		746	assert ( prev__cctx->inuse);
		747	assert (!next->cctx->inuse);
		748
		749	prev__cctx->inuse = 0;
		750	next->cctx->inuse = 1;
		751
		752	prev__cctx->top_env = PL_top_env;
		753	PL_top_env = next->cctx->top_env;
		754	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		755	}
		756
		757	free_coro_mortal ();
		758
		759	UNLOCK;
		760	}
		761	}
		762
		763	struct transfer_args
		764	{
		765	struct coro *prev, *next;
		766	int flags;
		767	};
		768
		769	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		770
		771	static void
		772	coro_state_destroy (struct coro *coro)
		773	{
		774	if (coro->refcnt--)
		775	return;
		776
		777	if (coro->flags & CF_RUNNING)
		778	croak ("FATAL: tried to destroy currently running coroutine");
		779
		780	if (coro->mainstack && coro->mainstack != main_mainstack)
		781	{
		782	struct coro temp;
		783
		784	SAVE ((&temp), TRANSFER_SAVE_ALL);
		785	LOAD (coro);
		786
		787	coro_destroy_stacks ();
		788
		789	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		790
		791	coro->mainstack = 0;
		792	}
		793
		794	cctx_destroy (coro->cctx);
		795	SvREFCNT_dec (coro->args);
		796	Safefree (coro);
		797	}
		798
804	static void	799	static int
		800	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		801	{
		802	struct coro *coro = (struct coro *)mg->mg_ptr;
		803	mg->mg_ptr = 0;
		804
		805	coro_state_destroy (coro);
		806
		807	return 0;
		808	}
		809
		810	static int
		811	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		812	{
		813	struct coro *coro = (struct coro *)mg->mg_ptr;
		814
		815	++coro->refcnt;
		816
		817	return 0;
		818	}
		819
		820	static MGVTBL coro_state_vtbl = {
		821	0, 0, 0, 0,
		822	coro_state_clear,
		823	0,
		824	#ifdef MGf_DUP
		825	coro_state_dup,
		826	#else
		827	# define MGf_DUP 0
		828	#endif
		829	};
		830
		831	static struct coro *
		832	SvSTATE (SV *coro)
		833	{
		834	HV *stash;
		835	MAGIC *mg;
		836
		837	if (SvROK (coro))
		838	coro = SvRV (coro);
		839
		840	stash = SvSTASH (coro);
		841	if (stash != coro_stash && stash != coro_state_stash)
		842	{
		843	/* very slow, but rare, check */
		844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		845	croak ("Coro::State object required");
		846	}
		847
		848	mg = SvMAGIC (coro);
		849	assert (mg->mg_type == PERL_MAGIC_ext);
		850	return (struct coro *)mg->mg_ptr;
		851	}
		852
		853	static void
		854	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		855	{
		856	ta->prev = SvSTATE (prev);
		857	ta->next = SvSTATE (next);
		858	ta->flags = flags;
		859	}
		860
		861	static void
805	api_transfer (pTHX_ SV *prev, SV *next, int flags)	862	api_transfer (SV *prev, SV *next, int flags)
806	{	863	{
807	SV_CORO (prev, "Coro::transfer");	864	dTHX;
808	SV_CORO (next, "Coro::transfer");	865	struct transfer_args ta;
809		866
810	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	867	prepare_transfer (&ta, prev, next, flags);
		868	TRANSFER (ta);
811	}	869	}
812		870
813	/** Coro ********************************************************************/	871	/** Coro ********************************************************************/
814		872
815	#define PRIO_MAX 3	873	#define PRIO_MAX 3
…		…
823	static GV *coro_current, *coro_idle;	881	static GV *coro_current, *coro_idle;
824	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
825	static int coro_nready;	883	static int coro_nready;
826		884
827	static void	885	static void
828	coro_enq (pTHX_ SV *sv)	886	coro_enq (SV *coro_sv)
829	{	887	{
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);	888	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
844	coro_nready++;	889	coro_nready++;
845	}	890	}
846		891
847	static SV *	892	static SV *
848	coro_deq (pTHX_ int min_prio)	893	coro_deq (int min_prio)
849	{	894	{
850	int prio = PRIO_MAX - PRIO_MIN;	895	int prio = PRIO_MAX - PRIO_MIN;
851		896
852	min_prio -= PRIO_MIN;	897	min_prio -= PRIO_MIN;
853	if (min_prio < 0)	898	if (min_prio < 0)
…		…
861	}	906	}
862		907
863	return 0;	908	return 0;
864	}	909	}
865		910
866	static void	911	static int
867	api_ready (SV *coro)	912	api_ready (SV *coro_sv)
		913	{
		914	struct coro *coro;
		915
		916	if (SvROK (coro_sv))
		917	coro_sv = SvRV (coro_sv);
		918
		919	coro = SvSTATE (coro_sv);
		920
		921	if (coro->flags & CF_READY)
		922	return 0;
		923
		924	if (coro->flags & CF_RUNNING)
		925	croak ("Coro::ready called on currently running coroutine");
		926
		927	coro->flags |= CF_READY;
		928
		929	LOCK;
		930	coro_enq (SvREFCNT_inc (coro_sv));
		931	UNLOCK;
		932
		933	return 1;
		934	}
		935
		936	static int
		937	api_is_ready (SV *coro_sv)
		938	{
		939	return !!SvSTATE (coro_sv)->flags & CF_READY;
		940	}
		941
		942	static void
		943	prepare_schedule (struct transfer_args *ta)
		944	{
		945	SV *current, *prev, *next;
		946
		947	current = GvSV (coro_current);
		948
		949	for (;;)
		950	{
		951	LOCK;
		952	next = coro_deq (PRIO_MIN);
		953	UNLOCK;
		954
		955	if (next)
		956	break;
		957
		958	{
		959	dSP;
		960
		961	ENTER;
		962	SAVETMPS;
		963
		964	PUSHMARK (SP);
		965	PUTBACK;
		966	call_sv (GvSV (coro_idle), G_DISCARD);
		967
		968	FREETMPS;
		969	LEAVE;
		970	}
		971	}
		972
		973	prev = SvRV (current);
		974	SvRV (current) = next;
		975
		976	/* free this only after the transfer */
		977	LOCK;
		978	free_coro_mortal ();
		979	UNLOCK;
		980	coro_mortal = prev;
		981
		982	ta->prev = SvSTATE (prev);
		983	ta->next = SvSTATE (next);
		984	ta->flags = TRANSFER_SAVE_ALL;
		985
		986	ta->next->flags &= ~CF_READY;
		987	}
		988
		989	static void
		990	prepare_cede (struct transfer_args *ta)
		991	{
		992	api_ready (GvSV (coro_current));
		993
		994	prepare_schedule (ta);
		995	}
		996
		997	static void
		998	api_schedule (void)
868	{	999	{
869	dTHX;	1000	dTHX;
		1001	struct transfer_args ta;
870		1002
871	if (SvROK (coro))	1003	prepare_schedule (&ta);
872	coro = SvRV (coro);	1004	TRANSFER (ta);
873
874	LOCK;
875	coro_enq (aTHX_ SvREFCNT_inc (coro));
876	UNLOCK;
877	}	1005	}
878		1006
879	static void	1007	static void
880	api_schedule (void)	1008	api_cede (void)
881	{	1009	{
882	dTHX;	1010	dTHX;
		1011	struct transfer_args ta;
883		1012
884	SV *prev, *next;	1013	prepare_cede (&ta);
885		1014	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	}	1015	}
919		1016
920	MODULE = Coro::State PACKAGE = Coro::State	1017	MODULE = Coro::State PACKAGE = Coro::State
921		1018
922	PROTOTYPES: ENABLE	1019	PROTOTYPES: DISABLE
923		1020
924	BOOT:	1021	BOOT:
925	{ /* {} necessary for stoopid perl-5.6.x */	1022	{
926	#ifdef USE_ITHREADS	1023	#ifdef USE_ITHREADS
927	MUTEX_INIT (&coro_mutex);	1024	MUTEX_INIT (&coro_mutex);
928	#endif	1025	#endif
929	BOOT_PAGESIZE;	1026	BOOT_PAGESIZE;
930		1027
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);	1028	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		1029
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1030	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1031	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1032	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
939		1033
940	main_mainstack = PL_mainstack;	1034	main_mainstack = PL_mainstack;
941		1035
942	coroapi.ver = CORO_API_VERSION;	1036	coroapi.ver = CORO_API_VERSION;
943	coroapi.transfer = api_transfer;	1037	coroapi.transfer = api_transfer;
944	}
945		1038
946	Coro::State	1039	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
947	_newprocess(args)	1040	}
948	SV * args	1041
949	PROTOTYPE: $	1042	SV *
		1043	new (char *klass, ...)
950	CODE:	1044	CODE:
951	Coro__State coro;	1045	{
		1046	struct coro *coro;
		1047	HV *hv;
		1048	int i;
952		1049
953	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
954	croak ("Coro::State::_newprocess expects an arrayref");
955
956	Newz (0, coro, 1, struct coro);	1050	Newz (0, coro, 1, struct coro);
		1051	coro->args = newAV ();
957		1052
958	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1053	hv = newHV ();
959	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1054	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
960	/*coro->stack = 0;*/	1055	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
961		1056
962	RETVAL = coro;	1057	for (i = 1; i < items; i++)
		1058	av_push (coro->args, newSVsv (ST (i)));
		1059	}
963	OUTPUT:	1060	OUTPUT:
964	RETVAL	1061	RETVAL
965		1062
966	void	1063	void
967	transfer(prev, next, flags)	1064	_set_stacklevel (...)
968	SV *prev	1065	ALIAS:
969	SV *next	1066	Coro::State::transfer = 1
970	int flags	1067	Coro::schedule = 2
971	PROTOTYPE: @	1068	Coro::cede = 3
		1069	Coro::Cont::yield = 4
972	CODE:	1070	CODE:
973	PUTBACK;	1071	{
974	SV_CORO (next, "Coro::transfer");	1072	struct transfer_args ta;
975	SV_CORO (prev, "Coro::transfer");	1073
976	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1074	switch (ix)
977	SPAGAIN;	1075	{
		1076	case 0:
		1077	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1078	ta.next = 0;
		1079	ta.flags = TRANSFER_SET_STACKLEVEL;
		1080	break;
		1081
		1082	case 1:
		1083	if (items != 3)
		1084	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1085
		1086	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1087	break;
		1088
		1089	case 2:
		1090	prepare_schedule (&ta);
		1091	break;
		1092
		1093	case 3:
		1094	prepare_cede (&ta);
		1095	break;
		1096
		1097	case 4:
		1098	{
		1099	SV *yieldstack;
		1100	SV *sv;
		1101	AV *defav = GvAV (PL_defgv);
		1102
		1103	yieldstack = *hv_fetch (
		1104	(HV *)SvRV (GvSV (coro_current)),
		1105	"yieldstack", sizeof ("yieldstack") - 1,
		1106	0
		1107	);
		1108
		1109	/* set up @_ -- ugly */
		1110	av_clear (defav);
		1111	av_fill (defav, items - 1);
		1112	while (items--)
		1113	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1114
		1115	sv = av_pop ((AV *)SvRV (yieldstack));
		1116	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1117	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1118	ta.flags = 0;
		1119	SvREFCNT_dec (sv);
		1120	}
		1121	break;
		1122
		1123	}
		1124
		1125	TRANSFER (ta);
		1126	}
978		1127
979	void	1128	void
980	DESTROY(coro)	1129	_clone_state_from (SV *dst, SV *src)
981	Coro::State coro	1130	CODE:
982	CODE:	1131	{
		1132	struct coro *coro_src = SvSTATE (src);
983		1133
984	if (coro->mainstack && coro->mainstack != main_mainstack)	1134	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
985	{
986	struct coro temp;
987		1135
988	PUTBACK;	1136	++coro_src->refcnt;
989	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1137	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
990	LOAD (aTHX_ coro);	1138	}
991	SPAGAIN;
992
993	destroy_stacks (aTHX);
994
995	LOAD ((&temp)); /* this will get rid of defsv etc.. */
996	SPAGAIN;
997
998	coro->mainstack = 0;
999	}
1000
1001	deallocate_stack (coro);
1002	SvREFCNT_dec (coro->args);
1003	Safefree (coro);
1004		1139
1005	void	1140	void
1006	_exit(code)	1141	_exit (code)
1007	int code	1142	int code
1008	PROTOTYPE: $	1143	PROTOTYPE: $
1009	CODE:	1144	CODE:
1010	_exit (code);	1145	_exit (code);
1011		1146
1012	MODULE = Coro::State PACKAGE = Coro::Cont	1147	int
		1148	cctx_count ()
		1149	CODE:
		1150	RETVAL = cctx_count;
		1151	OUTPUT:
		1152	RETVAL
1013		1153
1014	void	1154	int
1015	yield(...)	1155	cctx_idle ()
1016	PROTOTYPE: @	1156	CODE:
1017	CODE:	1157	RETVAL = cctx_idle;
1018	SV *yieldstack;	1158	OUTPUT:
1019	SV *sv;	1159	RETVAL
1020	AV *defav = GvAV (PL_defgv);
1021	struct coro *prev, *next;
1022
1023	yieldstack = *hv_fetch (
1024	(HV *)SvRV (GvSV (coro_current)),
1025	"yieldstack", sizeof ("yieldstack") - 1,
1026	0
1027	);
1028
1029	/* set up @_ -- ugly */
1030	av_clear (defav);
1031	av_fill (defav, items - 1);
1032	while (items--)
1033	av_store (defav, items, SvREFCNT_inc (ST(items)));
1034
1035	sv = av_pop ((AV *)SvRV (yieldstack));
1036	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1037	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1038	SvREFCNT_dec (sv);
1039
1040	coro_state_transfer (aTHX_ prev, next, 0);
1041		1160
1042	MODULE = Coro::State PACKAGE = Coro	1161	MODULE = Coro::State PACKAGE = Coro
1043		1162
1044	BOOT:	1163	BOOT:
1045	{	1164	{
1046	int i;	1165	int i;
		1166
1047	HV *stash = gv_stashpv ("Coro", TRUE);	1167	coro_stash = gv_stashpv ("Coro", TRUE);
1048		1168
1049	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1169	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1050	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1170	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1051	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1171	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1052	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1172	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1053	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1173	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1054	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1174	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1055		1175
1056	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1176	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1057	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1177	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1058		1178
1059	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1179	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1063	SV *sv = perl_get_sv("Coro::API", 1);	1183	SV *sv = perl_get_sv("Coro::API", 1);
1064		1184
1065	coroapi.schedule = api_schedule;	1185	coroapi.schedule = api_schedule;
1066	coroapi.cede = api_cede;	1186	coroapi.cede = api_cede;
1067	coroapi.ready = api_ready;	1187	coroapi.ready = api_ready;
		1188	coroapi.is_ready = api_is_ready;
1068	coroapi.nready = &coro_nready;	1189	coroapi.nready = &coro_nready;
1069	coroapi.current = coro_current;	1190	coroapi.current = coro_current;
1070		1191
1071	GCoroAPI = &coroapi;	1192	GCoroAPI = &coroapi;
1072	sv_setiv (sv, (IV)&coroapi);	1193	sv_setiv (sv, (IV)&coroapi);
1073	SvREADONLY_on (sv);	1194	SvREADONLY_on (sv);
1074	}	1195	}
1075	}	1196	}
1076		1197
1077	#if !PERL_MICRO	1198	int
		1199	prio (Coro::State coro, int newprio = 0)
		1200	ALIAS:
		1201	nice = 1
		1202	CODE:
		1203	{
		1204	RETVAL = coro->prio;
1078		1205
1079	void	1206	if (items > 1)
		1207	{
		1208	if (ix)
		1209	newprio += coro->prio;
		1210
		1211	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1212	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1213
		1214	coro->prio = newprio;
		1215	}
		1216	}
		1217
		1218	SV *
1080	ready(self)	1219	ready (SV *self)
1081	SV * self
1082	PROTOTYPE: $	1220	PROTOTYPE: $
1083	CODE:	1221	CODE:
1084	api_ready (self);	1222	RETVAL = boolSV (api_ready (self));
		1223	OUTPUT:
		1224	RETVAL
1085		1225
1086	#endif	1226	SV *
		1227	is_ready (SV *self)
		1228	PROTOTYPE: $
		1229	CODE:
		1230	RETVAL = boolSV (api_is_ready (self));
		1231	OUTPUT:
		1232	RETVAL
1087		1233
1088	int	1234	int
1089	nready(...)	1235	nready (...)
1090	PROTOTYPE:	1236	PROTOTYPE:
1091	CODE:	1237	CODE:
1092	RETVAL = coro_nready;	1238	RETVAL = coro_nready;
1093	OUTPUT:	1239	OUTPUT:
1094	RETVAL	1240	RETVAL
1095		1241
1096	void	1242	MODULE = Coro::State PACKAGE = Coro::AIO
1097	schedule(...)
1098	PROTOTYPE:
1099	CODE:
1100	api_schedule ();
1101		1243
1102	void
1103	cede(...)
1104	PROTOTYPE:
1105	CODE:
1106	api_cede ();
1107
1108	# and these are hacks
1109	SV *	1244	SV *
1110	_aio_get_state ()	1245	_get_state ()
1111	CODE:	1246	CODE:
1112	{	1247	{
1113	struct {	1248	struct {
1114	int errorno;	1249	int errorno;
1115	int laststype;	1250	int laststype;
…		…
1126	}	1261	}
1127	OUTPUT:	1262	OUTPUT:
1128	RETVAL	1263	RETVAL
1129		1264
1130	void	1265	void
1131	_aio_set_state (char *data_)	1266	_set_state (char *data_)
1132	PROTOTYPE: $	1267	PROTOTYPE: $
1133	CODE:	1268	CODE:
1134	{	1269	{
1135	struct {	1270	struct {
1136	int errorno;	1271	int errorno;

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