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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.111 by root, Thu Nov 30 18:21:14 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		73
64	/* 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
65	* 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
66	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
68		79
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		81
71	#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))
72		89
73	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		93
75	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
84	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
86	static HV *coro_state_stash, *coro_stash;	105	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
88		107
89	/* 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 */
90	typedef struct {	112	typedef struct coro_cctx {
91	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
92	int usecnt; /* shared by how many coroutines */
93	int gencnt; /* generation counter */
94		114
95	coro_context cctx;	115	/* the stack */
96
97	void *sptr;	116	void *sptr;
98	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
99	} coro_stack;
100		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 */
101	struct coro {	137	struct coro {
102	/* the optional C context */	138	/* the c coroutine allocated to this perl coroutine, if any */
103	coro_stack *stack;	139	coro_cctx *cctx;
104	void *cursp;	140
		141	/* data associated with this coroutine (initial args) */
		142	AV *args;
105	int gencnt;	143	int refcnt;
		144	int flags;
106		145
107	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
108	AV *defav;	147	AV *defav;
109	SV *defsv;	148	SV *defsv;
110	SV *errsv;	149	SV *errsv;
111		150
112	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
113	U8 dowarn;	152	# include "state.h"
114	I32 in_eval;	153	#undef VAR
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146		154
147	/* coro process data */	155	/* coro process data */
148	int prio;	156	int prio;
149
150	/* data associated with this coroutine (initial args) */
151	AV *args;
152	int refcnt;
153	};	157	};
154		158
155	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
157		161
158	static AV *	162	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	163	coro_clone_padlist (CV *cv)
160	{	164	{
161	AV *padlist = CvPADLIST (cv);	165	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	166	AV *newpadlist, *newpad;
163		167
164	newpadlist = newAV ();	168	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	170	#if PERL_VERSION_ATLEAST (5,9,0)
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		172	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	174	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	176	--AvFILLp (padlist);
173		177
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
176		180
177	return newpadlist;	181	return newpadlist;
178	}	182	}
179		183
180	static void	184	static void
181	free_padlist (pTHX_ AV *padlist)	185	free_padlist (AV *padlist)
182	{	186	{
183	/* may be during global destruction */	187	/* may be during global destruction */
184	if (SvREFCNT (padlist))	188	if (SvREFCNT (padlist))
185	{	189	{
186	I32 i = AvFILLp (padlist);	190	I32 i = AvFILLp (padlist);
…		…
207	AV *padlist;	211	AV *padlist;
208	AV *av = (AV *)mg->mg_obj;	212	AV *av = (AV *)mg->mg_obj;
209		213
210	/* casting is fun. */	214	/* casting is fun. */
211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212	free_padlist (aTHX_ padlist);	216	free_padlist (padlist);
213		217
214	SvREFCNT_dec (av);	218	SvREFCNT_dec (av);
215		219
216	return 0;	220	return 0;
217	}	221	}
218		222
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		224
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		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
223	/* the next two functions merely cache the padlists */	234	/* the next two functions merely cache the padlists */
224	static void	235	static void
225	get_padlist (pTHX_ CV *cv)	236	get_padlist (CV *cv)
226	{	237	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
228		240
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	243	else
232	{	244	{
233	#if 0	245	#if 0
234	/* this should work - but it doesn't :( */	246	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	247	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	248	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	249	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	250	SvREFCNT_dec (cp);
239	#else	251	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	252	CvPADLIST (cv) = coro_clone_padlist (cv);
241	#endif	253	#endif
242	}	254	}
243	}	255	}
244		256
245	static void	257	static void
246	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
247	{	259	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
249		262
250	if (!mg)	263	if (!mg)
251	{	264	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	267	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	268	mg->mg_obj = (SV *)newAV ();
256	}	269	}
257		270
258	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);
259	}	277	}
260		278
261	#define SB do {	279	#define SB do {
262	#define SE } while (0)	280	#define SE } while (0)
263		281
264	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
266		284
267	#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
268		286
269	static void	287	static void
270	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
271	{	289	{
272	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	291	# include "state.h"
274		292	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		293
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
310		297
…		…
313	CV *cv;	300	CV *cv;
314		301
315	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
317	{	304	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
324	}	307	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	308	}
328		309
329	PUTBACK;	310	PUTBACK;
330	}	311	}
331	}	312	}
332		313
333	static void	314	static void
334	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
335	{	316	{
336	{	317	{
337	dSP;	318	dSP;
338	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
353	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
354		335
355	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
356	{	337	{
357	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
358	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
359	{	341	{
360	EXTEND (SP, CvDEPTH(cv)*2);	342	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368		343
369	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
371		347
		348	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	349	get_padlist (cv);
373	}	350	}
374	}	351	}
375	#ifdef CXt_FORMAT	352	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
377	{	354	{
…		…
395		372
396	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;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
399		376
400	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	378	# include "state.h"
402		379	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	380	}
435		381
436	/*	382	/*
437	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	385	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	386	* not usually need a lot of stackspace.
441	*/	387	*/
442	static void	388	static void
443	coro_init_stacks (pTHX)	389	coro_init_stacks ()
444	{	390	{
445	LOCK;
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		395
…		…
472		416
473	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
474	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	419	PL_savestack_max = 96;
476		420
477	#if PERL_VERSION < 9	421	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
479	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	424	PL_retstack_max = 8;
481	#endif	425	#endif
482
483	UNLOCK;
484	}	426	}
485		427
486	/*	428	/*
487	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
488	*/	430	*/
489	static void	431	static void
490	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
491	{	433	{
492	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
493	{	435	{
494	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);	437	LEAVE_SCOPE (0);
…		…
526		468
527	Safefree (PL_tmps_stack);	469	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	470	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	471	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	472	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	473	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	474	Safefree (PL_retstack);
533	#endif	475	#endif
534	}	476	}
535		477
536	static void	478	static void
537	allocate_stack (Coro__State ctx, int alloc)	479	setup_coro (struct coro *coro)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546
547	if (alloc)
548	{
549	#if HAVE_MMAP
550	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
552	if (stack->sptr != (void *)-1)
553	{
554	# if STACKGUARD
555	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
556	# endif
557	}
558	else
559	#endif
560	{
561	stack->ssize = - (STACKSIZE * (long)sizeof (long));
562	New (0, stack->sptr, STACKSIZE, long);
563	}
564	}
565	else
566	stack->sptr = 0;
567
568	ctx->stack = stack;
569	}
570
571	static void
572	deallocate_stack (Coro__State ctx)
573	{
574	coro_stack *stack = ctx->stack;
575
576	ctx->stack = 0;
577
578	if (stack)
579	{
580	if (!--stack->refcnt)
581	{
582	#ifdef HAVE_MMAP
583	if (stack->ssize > 0 && stack->sptr)
584	munmap (stack->sptr, stack->ssize);
585	else
586	#endif
587	Safefree (stack->sptr);
588
589	Safefree (stack);
590	}
591	else if (ctx->gencnt == stack->gencnt)
592	--stack->usecnt;
593	}
594	}
595
596	static void
597	setup_coro (void *arg)
598	{	480	{
599	/*	481	/*
600	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
601	*/	483	*/
602	dTHX;
603	dSP;
604	Coro__State ctx = (Coro__State)arg;
605	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
606		484
607	coro_init_stacks (aTHX);	485	coro_init_stacks ();
		486
608	/*PL_curcop = 0;*/	487	PL_curcop = 0;
609	/*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
610	SvREFCNT_dec (GvAV (PL_defgv));	498	SvREFCNT_dec (GvAV (PL_defgv));
611	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	499	GvAV (PL_defgv) = coro->args; coro->args = 0;
612		500
613	SPAGAIN;
614
615	if (ctx->stack)
616	{
617	ctx->cursp = 0;
618
619	PUSHMARK(SP);
620	PUTBACK;
621	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623	if (SvTRUE (ERRSV))
624	croak (NULL);
625	else
626	croak ("FATAL: CCTXT coroutine returned!");
627	}
628	else
629	{
630	UNOP myop;
631
632	Zero(&myop, 1, UNOP);	501	Zero (&myop, 1, LOGOP);
633	myop.op_next = Nullop;	502	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;	503	myop.op_flags = OPf_WANT_VOID;
635		504
636	PL_op = (OP *)&myop;	505	PL_op = (OP *)&myop;
637		506
638	PUSHMARK(SP);	507	PUSHMARK (SP);
639	XPUSHs (sub_init);	508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
640	/*
641	* the next line is slightly wrong, as PL_op->op_next
642	* is actually being executed so we skip the first op.
643	* that doesn't matter, though, since it is only
644	* pp_nextstate and we never return...
645	* ah yes, and I don't care anyways ;)
646	*/
647	PUTBACK;	509	PUTBACK;
648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;	511	SPAGAIN;
650		512
651	ENTER; /* necessary e.g. for dounwind */	513	ENTER; /* necessary e.g. for dounwind */
652	}	514	}
653	}	515	}
654		516
655	static void	517	static void
656	continue_coro (void *arg)	518	free_coro_mortal ()
657	{	519	{
658	/*
659	* this is a _very_ stripped down perl interpreter ;)
660	*/
661	dTHX;
662	Coro__State ctx = (Coro__State)arg;
663
664	PL_top_env = &PL_start_env;
665
666	ctx->cursp = 0;
667	PL_op = PL_op->op_next;
668	CALLRUNOPS(aTHX);
669
670	abort ();
671	}
672
673	/* never call directly, always through the coro_state_transfer global variable */
674	static void
675	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
676	{
677	dSTACKLEVEL;
678
679	if (prev != next)
680	{
681	/* has this coro been created yet? */
682	if (next->mainstack)
683	{
684	LOCK;
685	SAVE (prev, flags);
686	LOAD (next);
687	UNLOCK;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}
722	else if (next->tmps_ix == -2)
723	croak ("tried to transfer to running coroutine");
724	else
725	{
726	LOCK;
727	SAVE (prev, -1); /* first get rid of the old state */
728	UNLOCK;
729
730	/* create the coroutine for the first time */
731	if (flags & TRANSFER_SAVE_CCTXT)
732	{
733	if (!prev->stack)
734	allocate_stack (prev, 0);
735
736	/* the new coroutine starts with start_env again */
737	PL_top_env = &PL_start_env;
738
739	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
740	{
741	setup_coro (next);
742	next->cursp = stacklevel;
743
744	prev->stack->refcnt++;
745	prev->stack->usecnt++;
746	next->stack = prev->stack;
747	next->gencnt = prev->gencnt;
748	}
749	else
750	{
751	assert (!next->stack);
752	allocate_stack (next, 1);
753	coro_create (&(next->stack->cctx),
754	setup_coro, (void *)next,
755	next->stack->sptr, labs (next->stack->ssize));
756	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
757	prev->cursp = stacklevel;
758	/* don't add any code here */
759	}
760	}
761	else
762	{
763	setup_coro (next);
764	next->cursp = stacklevel;
765	}
766	}
767	}
768
769	LOCK;
770	if (coro_mortal)	520	if (coro_mortal)
771	{	521	{
772	SvREFCNT_dec (coro_mortal);	522	SvREFCNT_dec (coro_mortal);
773	coro_mortal = 0;	523	coro_mortal = 0;
774	}	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() */
775	UNLOCK;	550	UNLOCK;
776	}
777		551
778	/* use this function pointer to call the above function */	552	/*
779	/* this is done to increase chances of the compiler not inlining the call */	553	* this is a _very_ stripped down perl interpreter ;)
780	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	554	*/
		555	PL_top_env = &PL_start_env;
		556
		557	/* inject call to cctx_init */
		558	prepare_cctx ((coro_cctx *)arg);
		559
		560	/* somebody will hit me for both perl_run and PL_restartop */
		561	perl_run (PL_curinterp);
		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	assert ( prev->flags & CF_RUNNING);
		688	assert (!next->flags & CF_RUNNING);
		689
		690	prev->flags &= ~CF_RUNNING;
		691	next->flags |= CF_RUNNING;
		692
		693	LOCK;
		694
		695	if (next->mainstack)
		696	{
		697	/* coroutine already started */
		698	SAVE (prev, flags);
		699	LOAD (next);
		700	}
		701	else
		702	{
		703	/* need to start coroutine */
		704	/* first get rid of the old state */
		705	SAVE (prev, -1);
		706	/* setup coroutine call */
		707	setup_coro (next);
		708	/* need a stack */
		709	assert (!next->stack);
		710	next->cctx = 0;
		711	}
		712
		713	prev__cctx = prev->cctx;
		714
		715	/* possibly "free" the cctx */
		716	if (prev__cctx->idle_sp == STACKLEVEL)
		717	{
		718	assert (PL_top_env == prev__cctx->top_env);//D
		719	cctx_put (prev__cctx);
		720	prev->cctx = 0;
		721	}
		722
		723	if (!next->cctx)
		724	next->cctx = cctx_get ();
		725
		726	if (prev__cctx != next->cctx)
		727	{
		728	assert ( prev__cctx->inuse);
		729	assert (!next->cctx->inuse);
		730
		731	prev__cctx->inuse = 0;
		732	next->cctx->inuse = 1;
		733
		734	prev__cctx->top_env = PL_top_env;
		735	PL_top_env = next->cctx->top_env;
		736	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		737	}
		738
		739	free_coro_mortal ();
		740
		741	UNLOCK;
		742	}
		743	}
		744
		745	struct transfer_args
		746	{
		747	struct coro *prev, *next;
		748	int flags;
		749	};
		750
		751	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
781		752
782	static void	753	static void
783	coro_state_destroy (struct coro *coro)	754	coro_state_destroy (struct coro *coro)
784	{	755	{
785	if (coro->refcnt--)	756	if (coro->refcnt--)
…		…
787		758
788	if (coro->mainstack && coro->mainstack != main_mainstack)	759	if (coro->mainstack && coro->mainstack != main_mainstack)
789	{	760	{
790	struct coro temp;	761	struct coro temp;
791		762
792	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	763	SAVE ((&temp), TRANSFER_SAVE_ALL);
793	LOAD (aTHX_ coro);	764	LOAD (coro);
794		765
795	destroy_stacks (aTHX);	766	coro_destroy_stacks ();
796		767
797	LOAD ((&temp)); /* this will get rid of defsv etc.. */	768	LOAD ((&temp)); /* this will get rid of defsv etc.. */
798		769
799	coro->mainstack = 0;	770	coro->mainstack = 0;
800	}	771	}
801		772
802	deallocate_stack (coro);	773	cctx_free (coro->cctx);
803	SvREFCNT_dec (coro->args);	774	SvREFCNT_dec (coro->args);
804	Safefree (coro);	775	Safefree (coro);
805	}	776	}
806		777
807	static int	778	static int
808	coro_state_clear (SV *sv, MAGIC *mg)	779	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
809	{	780	{
810	struct coro *coro = (struct coro *)mg->mg_ptr;	781	struct coro *coro = (struct coro *)mg->mg_ptr;
811	mg->mg_ptr = 0;	782	mg->mg_ptr = 0;
812		783
813	coro_state_destroy (coro);	784	coro_state_destroy (coro);
814		785
815	return 0;	786	return 0;
816	}	787	}
817		788
818	static int	789	static int
819	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	790	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
820	{	791	{
821	struct coro *coro = (struct coro *)mg->mg_ptr;	792	struct coro *coro = (struct coro *)mg->mg_ptr;
822		793
823	++coro->refcnt;	794	++coro->refcnt;
824		795
825	return 0;	796	return 0;
826	}	797	}
827		798
828	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	799	static MGVTBL coro_state_vtbl = {
		800	0, 0, 0, 0,
		801	coro_state_clear,
		802	0,
		803	#ifdef MGf_DUP
		804	coro_state_dup,
		805	#else
		806	# define MGf_DUP 0
		807	#endif
		808	};
829		809
830	static struct coro *	810	static struct coro *
831	SvSTATE (SV *coro)	811	SvSTATE (SV *coro)
832	{	812	{
833	HV *stash;	813	HV *stash;
…		…
848	assert (mg->mg_type == PERL_MAGIC_ext);	828	assert (mg->mg_type == PERL_MAGIC_ext);
849	return (struct coro *)mg->mg_ptr;	829	return (struct coro *)mg->mg_ptr;
850	}	830	}
851		831
852	static void	832	static void
		833	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		834	{
		835	ta->prev = SvSTATE (prev);
		836	ta->next = SvSTATE (next);
		837	ta->flags = flags;
		838	}
		839
		840	static void
853	api_transfer (pTHX_ SV *prev, SV *next, int flags)	841	api_transfer (SV *prev, SV *next, int flags)
854	{	842	{
855	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	843	dTHX;
		844	struct transfer_args ta;
		845
		846	prepare_transfer (&ta, prev, next, flags);
		847	TRANSFER (ta);
856	}	848	}
857		849
858	/** Coro ********************************************************************/	850	/** Coro ********************************************************************/
859		851
860	#define PRIO_MAX 3	852	#define PRIO_MAX 3
…		…
868	static GV *coro_current, *coro_idle;	860	static GV *coro_current, *coro_idle;
869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	861	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870	static int coro_nready;	862	static int coro_nready;
871		863
872	static void	864	static void
873	coro_enq (pTHX_ SV *sv)	865	coro_enq (SV *sv)
874	{	866	{
875	int prio;	867	int prio;
876		868
877	if (SvTYPE (sv) != SVt_PVHV)	869	if (SvTYPE (sv) != SVt_PVHV)
878	croak ("Coro::ready tried to enqueue something that is not a coroutine");	870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
…		…
882	av_push (coro_ready [prio - PRIO_MIN], sv);	874	av_push (coro_ready [prio - PRIO_MIN], sv);
883	coro_nready++;	875	coro_nready++;
884	}	876	}
885		877
886	static SV *	878	static SV *
887	coro_deq (pTHX_ int min_prio)	879	coro_deq (int min_prio)
888	{	880	{
889	int prio = PRIO_MAX - PRIO_MIN;	881	int prio = PRIO_MAX - PRIO_MIN;
890		882
891	min_prio -= PRIO_MIN;	883	min_prio -= PRIO_MIN;
892	if (min_prio < 0)	884	if (min_prio < 0)
…		…
900	}	892	}
901		893
902	return 0;	894	return 0;
903	}	895	}
904		896
905	static void	897	static int
906	api_ready (SV *coro)	898	api_ready (SV *coro_sv)
907	{	899	{
908	dTHX;	900	struct coro *coro;
909		901
910	if (SvROK (coro))	902	if (SvROK (coro_sv))
911	coro = SvRV (coro);	903	coro_sv = SvRV (coro_sv);
		904
		905	coro = SvSTATE (coro_sv);
		906	if (coro->flags & CF_READY)
		907	return 0;
		908
		909	coro->flags |= CF_READY;
912		910
913	LOCK;	911	LOCK;
914	coro_enq (aTHX_ SvREFCNT_inc (coro));	912	coro_enq (SvREFCNT_inc (coro_sv));
915	UNLOCK;	913	UNLOCK;
916	}
917		914
		915	return 1;
		916	}
		917
918	static void	918	static int
919	api_schedule (void)	919	api_is_ready (SV *coro_sv)
920	{	920	{
921	dTHX;	921	struct coro *coro;
922		922
		923	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		924	}
		925
		926	static void
		927	prepare_schedule (struct transfer_args *ta)
		928	{
923	SV *prev, *next;	929	SV *current, *prev, *next;
		930
924	SV *current = GvSV (coro_current);	931	current = GvSV (coro_current);
925		932
926	for (;;)	933	for (;;)
927	{	934	{
928	LOCK;	935	LOCK;
929
930	next = coro_deq (aTHX_ PRIO_MIN);	936	next = coro_deq (PRIO_MIN);
		937	UNLOCK;
931		938
932	if (next)	939	if (next)
933	break;	940	break;
934
935	UNLOCK;
936		941
937	{	942	{
938	dSP;	943	dSP;
939		944
940	ENTER;	945	ENTER;
…		…
951		956
952	prev = SvRV (current);	957	prev = SvRV (current);
953	SvRV (current) = next;	958	SvRV (current) = next;
954		959
955	/* free this only after the transfer */	960	/* free this only after the transfer */
		961	LOCK;
		962	free_coro_mortal ();
		963	UNLOCK;
956	coro_mortal = prev;	964	coro_mortal = prev;
957		965
958	UNLOCK;	966	ta->prev = SvSTATE (prev);
		967	ta->next = SvSTATE (next);
		968	ta->flags = TRANSFER_SAVE_ALL;
959		969
960	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	970	ta->next->flags &= ~CF_READY;
961	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	971	}
		972
		973	static void
		974	prepare_cede (struct transfer_args *ta)
		975	{
		976	api_ready (GvSV (coro_current));
		977
		978	prepare_schedule (ta);
		979	}
		980
		981	static void
		982	api_schedule (void)
		983	{
		984	dTHX;
		985	struct transfer_args ta;
		986
		987	prepare_schedule (&ta);
		988	TRANSFER (ta);
962	}	989	}
963		990
964	static void	991	static void
965	api_cede (void)	992	api_cede (void)
966	{	993	{
967	dTHX;	994	dTHX;
		995	struct transfer_args ta;
968		996
969	LOCK;	997	prepare_cede (&ta);
970	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	998	TRANSFER (ta);
971	UNLOCK;
972
973	api_schedule ();
974	}	999	}
975		1000
976	MODULE = Coro::State PACKAGE = Coro::State	1001	MODULE = Coro::State PACKAGE = Coro::State
977		1002
978	PROTOTYPES: DISABLE	1003	PROTOTYPES: DISABLE
…		…
987	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1012	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
988		1013
989	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1014	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
990	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1015	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
991	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1016	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
992	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
993		1017
994	main_mainstack = PL_mainstack;	1018	main_mainstack = PL_mainstack;
995		1019
996	coroapi.ver = CORO_API_VERSION;	1020	coroapi.ver = CORO_API_VERSION;
997	coroapi.transfer = api_transfer;	1021	coroapi.transfer = api_transfer;
…		…
1008	int i;	1032	int i;
1009		1033
1010	Newz (0, coro, 1, struct coro);	1034	Newz (0, coro, 1, struct coro);
1011	coro->args = newAV ();	1035	coro->args = newAV ();
1012		1036
1013	for (i = 1; i < items; i++)
1014	av_push (coro->args, newSVsv (ST (i)));
1015
1016	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1017	/*coro->stack = 0;*/
1018
1019	hv = newHV ();	1037	hv = newHV ();
1020	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1038	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1021	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1039	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1040
		1041	for (i = 1; i < items; i++)
		1042	av_push (coro->args, newSVsv (ST (i)));
1022	}	1043	}
1023	OUTPUT:	1044	OUTPUT:
1024	RETVAL	1045	RETVAL
1025		1046
1026	void	1047	void
1027	transfer(prev, next, flags)	1048	_set_stacklevel (...)
1028	SV *prev	1049	ALIAS:
1029	SV *next	1050	Coro::State::transfer = 1
1030	int flags	1051	Coro::schedule = 2
		1052	Coro::cede = 3
		1053	Coro::Cont::yield = 4
1031	CODE:	1054	CODE:
1032	PUTBACK;
1033	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1034	SPAGAIN;
1035
1036	int
1037	prio (Coro::State coro, int newprio = 0)
1038	ALIAS:
1039	nice = 1
1040	CODE:
1041	{	1055	{
1042	RETVAL = coro->prio;	1056	struct transfer_args ta;
1043		1057
1044	if (items > 1)	1058	switch (ix)
1045	{	1059	{
		1060	case 0:
		1061	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1062	ta.next = 0;
		1063	ta.flags = TRANSFER_SET_STACKLEVEL;
		1064	break;
		1065
		1066	case 1:
1046	if (ix)	1067	if (items != 3)
1047	newprio += coro->prio;	1068	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1048		1069
1049	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1070	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1050	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1071	break;
1051		1072
1052	coro->prio = newprio;	1073	case 2:
		1074	prepare_schedule (&ta);
		1075	break;
		1076
		1077	case 3:
		1078	prepare_cede (&ta);
		1079	break;
		1080
		1081	case 4:
		1082	{
		1083	SV *yieldstack;
		1084	SV *sv;
		1085	AV *defav = GvAV (PL_defgv);
		1086
		1087	yieldstack = *hv_fetch (
		1088	(HV *)SvRV (GvSV (coro_current)),
		1089	"yieldstack", sizeof ("yieldstack") - 1,
		1090	0
		1091	);
		1092
		1093	/* set up @_ -- ugly */
		1094	av_clear (defav);
		1095	av_fill (defav, items - 1);
		1096	while (items--)
		1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1098
		1099	sv = av_pop ((AV *)SvRV (yieldstack));
		1100	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1101	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1102	ta.flags = 0;
		1103	SvREFCNT_dec (sv);
		1104	}
		1105	break;
		1106
1053	}	1107	}
		1108
		1109	TRANSFER (ta);
1054	}	1110	}
1055		1111
1056	void	1112	void
1057	_clone_state_from (SV *dst, SV *src)	1113	_clone_state_from (SV *dst, SV *src)
1058	CODE:	1114	CODE:
…		…
1070	int code	1126	int code
1071	PROTOTYPE: $	1127	PROTOTYPE: $
1072	CODE:	1128	CODE:
1073	_exit (code);	1129	_exit (code);
1074		1130
1075	MODULE = Coro::State PACKAGE = Coro::Cont	1131	int
		1132	cctx_count ()
		1133	CODE:
		1134	RETVAL = cctx_count;
		1135	OUTPUT:
		1136	RETVAL
1076		1137
1077	void	1138	int
1078	yield (...)	1139	cctx_idle ()
1079	PROTOTYPE: @	1140	CODE:
1080	CODE:	1141	RETVAL = cctx_idle;
1081	{	1142	OUTPUT:
1082	SV *yieldstack;	1143	RETVAL
1083	SV *sv;
1084	AV *defav = GvAV (PL_defgv);
1085	struct coro *prev, *next;
1086
1087	yieldstack = *hv_fetch (
1088	(HV *)SvRV (GvSV (coro_current)),
1089	"yieldstack", sizeof ("yieldstack") - 1,
1090	0
1091	);
1092
1093	/* set up @_ -- ugly */
1094	av_clear (defav);
1095	av_fill (defav, items - 1);
1096	while (items--)
1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099	sv = av_pop ((AV *)SvRV (yieldstack));
1100	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102	SvREFCNT_dec (sv);
1103
1104	coro_state_transfer (aTHX_ prev, next, 0);
1105	}
1106		1144
1107	MODULE = Coro::State PACKAGE = Coro	1145	MODULE = Coro::State PACKAGE = Coro
1108		1146
1109	BOOT:	1147	BOOT:
1110	{	1148	{
…		…
1129	SV *sv = perl_get_sv("Coro::API", 1);	1167	SV *sv = perl_get_sv("Coro::API", 1);
1130		1168
1131	coroapi.schedule = api_schedule;	1169	coroapi.schedule = api_schedule;
1132	coroapi.cede = api_cede;	1170	coroapi.cede = api_cede;
1133	coroapi.ready = api_ready;	1171	coroapi.ready = api_ready;
		1172	coroapi.is_ready = api_is_ready;
1134	coroapi.nready = &coro_nready;	1173	coroapi.nready = &coro_nready;
1135	coroapi.current = coro_current;	1174	coroapi.current = coro_current;
1136		1175
1137	GCoroAPI = &coroapi;	1176	GCoroAPI = &coroapi;
1138	sv_setiv (sv, (IV)&coroapi);	1177	sv_setiv (sv, (IV)&coroapi);
1139	SvREADONLY_on (sv);	1178	SvREADONLY_on (sv);
1140	}	1179	}
1141	}	1180	}
1142		1181
1143	#if !PERL_MICRO	1182	int
		1183	prio (Coro::State coro, int newprio = 0)
		1184	ALIAS:
		1185	nice = 1
		1186	CODE:
		1187	{
		1188	RETVAL = coro->prio;
1144		1189
1145	void	1190	if (items > 1)
		1191	{
		1192	if (ix)
		1193	newprio += coro->prio;
		1194
		1195	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1196	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1197
		1198	coro->prio = newprio;
		1199	}
		1200	}
		1201
		1202	SV *
1146	ready (self)	1203	ready (SV *self)
1147	SV * self
1148	PROTOTYPE: $	1204	PROTOTYPE: $
1149	CODE:	1205	CODE:
1150	api_ready (self);	1206	RETVAL = boolSV (api_ready (self));
		1207	OUTPUT:
		1208	RETVAL
1151		1209
1152	#endif	1210	SV *
		1211	is_ready (SV *self)
		1212	PROTOTYPE: $
		1213	CODE:
		1214	RETVAL = boolSV (api_is_ready (self));
		1215	OUTPUT:
		1216	RETVAL
1153		1217
1154	int	1218	int
1155	nready (...)	1219	nready (...)
1156	PROTOTYPE:	1220	PROTOTYPE:
1157	CODE:	1221	CODE:
1158	RETVAL = coro_nready;	1222	RETVAL = coro_nready;
1159	OUTPUT:	1223	OUTPUT:
1160	RETVAL	1224	RETVAL
1161		1225
1162	void	1226	MODULE = Coro::State PACKAGE = Coro::AIO
1163	schedule (...)
1164	PROTOTYPE:
1165	CODE:
1166	api_schedule ();
1167		1227
1168	void
1169	cede (...)
1170	PROTOTYPE:
1171	CODE:
1172	api_cede ();
1173
1174	# and these are hacks
1175	SV *	1228	SV *
1176	_aio_get_state ()	1229	_get_state ()
1177	CODE:	1230	CODE:
1178	{	1231	{
1179	struct {	1232	struct {
1180	int errorno;	1233	int errorno;
1181	int laststype;	1234	int laststype;
…		…
1192	}	1245	}
1193	OUTPUT:	1246	OUTPUT:
1194	RETVAL	1247	RETVAL
1195		1248
1196	void	1249	void
1197	_aio_set_state (char *data_)	1250	_set_state (char *data_)
1198	PROTOTYPE: $	1251	PROTOTYPE: $
1199	CODE:	1252	CODE:
1200	{	1253	{
1201	struct {	1254	struct {
1202	int errorno;	1255	int errorno;

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