[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs.
Revision 1.177 by root, Tue Oct 2 10:24:44 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
63		92
64	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	94	* portable way as possible. */
66	* and should be unique. */	95	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
68		97
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		99
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
72		109
73	#include "CoroAPI.h"	110	#include "CoroAPI.h"
74		111
75	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
79	#else	116	#else
80	# define LOCK (void)0	117	# define LOCK (void)0
81	# define UNLOCK (void)0	118	# define UNLOCK (void)0
82	#endif	119	#endif
83		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
85	static AV main_mainstack; / used to differentiate between $main and others */	132	static AV main_mainstack; / used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
86	static HV coro_state_stash, coro_stash;	134	static HV coro_state_stash, coro_stash;
87	static SV coro_mortal; / will be freed after next transfer */	135	static SV coro_mortal; / will be freed after next transfer */
88		136
89	/* this is actually not just the c stack but also c registers etc... */	137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		152	};
		153
		154	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	155	typedef struct coro_cctx {
91	struct coro_stack *next;	156	struct coro_cctx *next;
92		157
93	void *idle_sp;	158	/* the stack */
94	void *sptr;	159	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	160	size_t ssize;
96		161
97	/* cpu state */	162	/* cpu state */
		163	void idle_sp; / sp of top-level transfer/schedule/cede call */
		164	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		165	JMPENV *top_env;
98	coro_context cctx;	166	coro_context cctx;
99	} coro_stack;
100		167
101	static coro_stack *main_stack;	168	#if CORO_USE_VALGRIND
		169	int valgrind_id;
		170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
102		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
		180
		181	/* this is a structure representing a perl-level coroutine */
103	struct coro {	182	struct coro {
104	/* optionally saved, might be zero */	183	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	184	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
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
147	/* coro process data */
148	int prio;
149		185
150	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
151	AV *args;	187	AV *args;
152	int refcnt;	188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
		191
		192	/* optionally saved, might be zero */
		193	AV defav; / @_ */
		194	SV defsv; / $_ */
		195	SV errsv; / $@ */
		196	GV deffh; / default filehandle */
		197	SV irssv; / $/ */
		198	SV irssv_sv; / real $/ cache */
		199
		200	#define VAR(name,type) type name;
		201	# include "state.h"
		202	#undef VAR
		203
		204	/* statistics */
		205	int usecount; /* number of switches to this coro */
		206
		207	/* coro process data */
		208	int prio;
		209
		210	/* linked list */
		211	struct coro next, prev;
		212	HV hv; / the perl hash associated with this coro, if any */
153	};	213	};
154		214
155	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
157		217
		218	/ Coro ******************************************************************/
		219
		220	#define PRIO_MAX 3
		221	#define PRIO_HIGH 1
		222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/ lowlevel stuff ********************************************************/
		234
158	static AV *	235	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	236	coro_clone_padlist (pTHX_ CV *cv)
160	{	237	{
161	AV *padlist = CvPADLIST (cv);	238	AV *padlist = CvPADLIST (cv);
162	AV newpadlist, newpad;	239	AV newpadlist, newpad;
163		240
164	newpadlist = newAV ();	241	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	242	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	243	#if PERL_VERSION_ATLEAST (5,9,0)
		244	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		245	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	246	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	247	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	248	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	249	--AvFILLp (padlist);
173		250
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	251	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		295
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	296	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		297
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	298	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		299
		300	#define CORO_MAGIC(cv) \
		301	SvMAGIC (cv) \
		302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		303	? SvMAGIC (cv) \
		304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		305	: 0
		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		332
223	/* the next two functions merely cache the padlists */	333	/* the next two functions merely cache the padlists */
224	static void	334	static void
225	get_padlist (pTHX_ CV *cv)	335	get_padlist (pTHX_ CV *cv)
226	{	336	{
227	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	337	MAGIC *mg = CORO_MAGIC (cv);
		338	AV *av;
228		339
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	342	else
232	{	343	{
233	#if 0	344	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	345	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	346	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	347	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	348	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	349	SvREFCNT_dec (cp);
239	#else	350	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	354	}
244		355
245	static void	356	static void
246	put_padlist (pTHX_ CV *cv)	357	put_padlist (pTHX_ CV *cv)
247	{	358	{
248	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	359	MAGIC *mg = CORO_MAGIC (cv);
		360	AV *av;
249		361
250	if (!mg)	362	if (!mg)
251	{	363	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	364	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	365	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	366	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	367	mg->mg_obj = (SV *)newAV ();
256	}	368	}
257		369
258	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	370	av = (AV *)mg->mg_obj;
		371
		372	if (AvFILLp (av) >= AvMAX (av))
		373	av_extend (av, AvMAX (av) + 1);
		374
		375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	376	}
		377
		378	/ load & save, init *****************************************************/
260		379
261	#define SB do {	380	#define SB do {
262	#define SE } while (0)	381	#define SE } while (0)
263		382
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		384
269	static void	385	static void
270	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
271	{	387	{
272	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	389	# include "state.h"
274		390	#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		391
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		400	{
		401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
		403	}
		404	else
		405	{
		406	REPLACE_SV (PL_rs, c->irssv);
		407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		408	sv_setsv (c->irssv_sv, PL_rs);
		409	}
		410	}
310		411
311	{	412	{
312	dSP;	413	dSP;
313	CV *cv;	414	CV *cv;
314		415
315	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
317	{	418	{
318	AV padlist = (AV )POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	420	CvDEPTH (cv) = PTR2IV (POPs);
324	}	421	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	422	}
328		423
329	PUTBACK;	424	PUTBACK;
330	}	425	}
331	}	426	}
332		427
333	static void	428	static void
334	save_state(pTHX_ Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
335	{	430	{
336	{	431	{
337	dSP;	432	dSP;
338	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	437	/*
343	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
345	*/	440	*/
346		441
347	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
349	for (;;)	444	for (;;)
350	{	445	{
351	while (cxix >= 0)	446	while (cxix >= 0)
352	{	447	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
354		449
355	if (CxTYPE(cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
356	{	451	{
357	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
		453
358	if (CvDEPTH(cv))	454	if (CvDEPTH (cv))
359	{	455	{
360	EXTEND (SP, CvDEPTH(cv)*2);	456	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
369	PUSHs ((SV *)CvPADLIST(cv));	457	PUSHs ((SV *)CvPADLIST (cv));
		458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
371		460
		461	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	462	get_padlist (aTHX_ cv);
373	}	463	}
374	}	464	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	465	}
384		466
385	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
386	break;	468	break;
387		469
388	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
391	}	473	}
392		474
393	PUTBACK;	475	PUTBACK;
394	}	476	}
395		477
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
399		483
400	c->dowarn = PL_dowarn;	484	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	485	# include "state.h"
402		486	#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	}	487	}
435		488
436	/*	489	/*
437	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	492	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	493	* not usually need a lot of stackspace.
441	*/	494	*/
		495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
442	static void	498	static void
443	coro_init_stacks (pTHX)	499	coro_init_stacks (pTHX)
444	{	500	{
445	LOCK;	501	PL_curstackinfo = new_stackinfo(64, 6);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		505
452	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		509
456	New(50,PL_tmps_stack,96,SV*);	510	New(50,PL_tmps_stack,64,SV*);
457	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	513	PL_tmps_max = 64;
460		514
461	New(54,PL_markstack,16,I32);	515	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	517	PL_markstack_max = PL_markstack + 16;
464		518
…		…
468		522
469	New(54,PL_scopestack,16,I32);	523	New(54,PL_scopestack,16,I32);
470	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	525	PL_scopestack_max = 16;
472		526
473	New(54,PL_savestack,96,ANY);	527	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	529	PL_savestack_max = 64;
476		530
477	#if PERL_VERSION < 9	531	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	532	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	534	PL_retstack_max = 4;
481	#endif	535	#endif
482
483	UNLOCK;
484	}	536	}
		537	#endif
485		538
486	/*	539	/*
487	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
488	*/	541	*/
489	static void	542	static void
490	destroy_stacks(pTHX)	543	coro_destroy_stacks (pTHX)
491	{	544	{
492	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
493	{	546	{
494	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
495	LEAVE_SCOPE (0);	548	LEAVE_SCOPE (0);
		549	assert (PL_tmps_floor == -1);
496		550
497	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
498	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
499		554
		555	/* unwind all extra stacks */
500	/POPSTACK_TO (PL_mainstack);//D//use/	556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
501	}	560	}
502		561
503	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
505		564
506	while (PL_curstackinfo)	565	while (PL_curstackinfo)
507	{	566	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
509		568
510	{ /D//remove/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/D//remove/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		571
522	Safefree (PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	573	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	574	PL_curstackinfo = p;
525	}	575	}
526		576
527	Safefree (PL_tmps_stack);	577	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	578	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	579	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	580	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	581	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	582	Safefree (PL_retstack);
533	#endif	583	#endif
534	}	584	}
535		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/ coroutine stack handling **********************************************/
		618
536	static void	619	static void
537	setup_coro (struct coro *coro)	620	setup_coro (pTHX_ struct coro *coro)
538	{	621	{
539	/*	622	/*
540	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
541	*/	624	*/
542	dTHX;	625	coro_init_stacks (aTHX);
		626
		627	PL_runops = RUNOPS_DEFAULT;
		628	PL_curcop = &PL_compiling;
		629	PL_in_eval = EVAL_NULL;
		630	PL_comppad = 0;
		631	PL_curpm = 0;
		632	PL_localizing = 0;
		633	PL_dirty = 0;
		634	PL_restartop = 0;
		635
		636	{
		637	dSP;
		638	LOGOP myop;
		639
		640	SvREFCNT_dec (GvAV (PL_defgv));
		641	GvAV (PL_defgv) = coro->args; coro->args = 0;
		642
		643	Zero (&myop, 1, LOGOP);
		644	myop.op_next = Nullop;
		645	myop.op_flags = OPf_WANT_VOID;
		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
		650	PL_op = (OP *)&myop;
		651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		652	SPAGAIN;
		653	}
		654
		655	ENTER; /* necessary e.g. for dounwind */
		656	}
		657
		658	static void
		659	free_coro_mortal (pTHX)
		660	{
		661	if (coro_mortal)
		662	{
		663	SvREFCNT_dec (coro_mortal);
		664	coro_mortal = 0;
		665	}
		666	}
		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (cctx->flags & CC_TRACE_ALL)
		681	{
		682	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		683	{
		684	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		685	SV bot, top;
		686	AV av = newAV (); / return values */
		687	SV **cb;
		688	dSP;
		689
		690	GV *gv = CvGV (cx->blk_sub.cv);
		691	SV *fullname = sv_2mortal (newSV (0));
		692	if (isGV (gv))
		693	gv_efullname3 (fullname, gv, 0);
		694
		695	bot = PL_stack_base + cx->blk_oldsp + 1;
		696	top = cx->blk_gimme == G_ARRAY ? SP + 1
		697	: cx->blk_gimme == G_SCALAR ? bot + 1
		698	: bot;
		699
		700	while (bot < top)
		701	av_push (av, SvREFCNT_inc (*bot++));
		702
		703	PL_runops = RUNOPS_DEFAULT;
		704	ENTER;
		705	SAVETMPS;
		706	EXTEND (SP, 3);
		707	PUSHMARK (SP);
		708	PUSHs (&PL_sv_no);
		709	PUSHs (fullname);
		710	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		711	PUTBACK;
		712	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		713	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		714	SPAGAIN;
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = runops_trace;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	runops_proc_t old_runops = PL_runops;
		735	dSP;
		736	GV *gv = CvGV (cx->blk_sub.cv);
		737	SV *fullname = sv_2mortal (newSV (0));
		738
		739	if (isGV (gv))
		740	gv_efullname3 (fullname, gv, 0);
		741
		742	PL_runops = RUNOPS_DEFAULT;
		743	ENTER;
		744	SAVETMPS;
		745	EXTEND (SP, 3);
		746	PUSHMARK (SP);
		747	PUSHs (&PL_sv_yes);
		748	PUSHs (fullname);
		749	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		750	PUTBACK;
		751	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		752	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		753	SPAGAIN;
		754	FREETMPS;
		755	LEAVE;
		756	PL_runops = runops_trace;
		757	}
		758
		759	oldcxix = cxstack_ix;
		760	}
		761
		762	if (cctx->flags & CC_TRACE_LINE)
		763	{
		764	dSP;
		765
		766	PL_runops = RUNOPS_DEFAULT;
		767	ENTER;
		768	SAVETMPS;
		769	EXTEND (SP, 3);
		770	PL_runops = RUNOPS_DEFAULT;
		771	PUSHMARK (SP);
		772	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		773	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		774	PUTBACK;
		775	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		776	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		777	SPAGAIN;
		778	FREETMPS;
		779	LEAVE;
		780	PL_runops = runops_trace;
		781	}
		782	}
		783	}
		784	}
		785	}
		786
		787	TAINT_NOT;
		788	return 0;
		789	}
		790
		791	/* inject a fake call to Coro::State::_cctx_init into the execution */
		792	/* _cctx_init should be careful, as it could be called at almost any time */
		793	/* during execution of a perl program */
		794	static void NOINLINE
		795	prepare_cctx (pTHX_ coro_cctx *cctx)
		796	{
543	dSP;	797	dSP;
544	UNOP myop;	798	LOGOP myop;
545	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
546		799
547	coro_init_stacks (aTHX);	800	PL_top_env = &PL_start_env;
548	/PL_curcop = 0;/
549	/PL_in_eval = PL_in_eval;/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		801
553	SPAGAIN;	802	if (cctx->flags & CC_TRACE)
		803	PL_runops = runops_trace;
554		804
555	Zero (&myop, 1, UNOP);	805	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	806	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	807	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
558		808
		809	PUSHMARK (SP);
		810	EXTEND (SP, 2);
		811	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		812	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		813	PUTBACK;
559	PL_op = (OP *)&myop;	814	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	815	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	816	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	817	}
569		818
570	static void	819	/*
571	transfer_tail ()	820	* this is a _very_ stripped down perl interpreter ;)
572	{	821	*/
573	if (coro_mortal)
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578
579	UNLOCK;
580	}
581
582	static void	822	static void
583	coro_run (void *arg)	823	coro_run (void *arg)
584	{	824	{
		825	dTHX;
		826
		827	/* coro_run is the alternative tail of transfer(), so unlock here. */
		828	UNLOCK;
		829
		830	/* we now skip the entersub that lead to transfer() */
		831	PL_op = PL_op->op_next;
		832
		833	/* inject a fake subroutine call to cctx_init */
		834	prepare_cctx (aTHX_ (coro_cctx *)arg);
		835
		836	/* somebody or something will hit me for both perl_run and PL_restartop */
		837	PL_restartop = PL_op;
		838	perl_run (PL_curinterp);
		839
585	/*	840	/*
586	* this is a _very_ stripped down perl interpreter ;)	841	* If perl-run returns we assume exit() was being called or the coro
		842	* fell off the end, which seems to be the only valid (non-bug)
		843	* reason for perl_run to return. We try to exit by jumping to the
		844	* bootstrap-time "top" top_env, as we cannot restore the "main"
		845	* coroutine as Coro has no such concept
587	*/	846	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	847	PL_top_env = main_top_env;
593	PL_restartop = PL_op->op_next;	848	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	/* somebody will hit me for both perl_run and PL_restart_top */
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}	849	}
599		850
600	static coro_stack *	851	static coro_cctx *
601	stack_new ()	852	cctx_new ()
602	{	853	{
603	coro_stack *stack;	854	coro_cctx *cctx;
		855	void *stack_start;
		856	size_t stack_size;
604		857
		858	++cctx_count;
		859
605	New (0, stack, 1, coro_stack);	860	Newz (0, cctx, 1, coro_cctx);
606		861
607	#if HAVE_MMAP	862	#if HAVE_MMAP
608		863
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	864	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		865	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	866	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
611		867
612	if (stack->sptr == (void *)-1)	868	if (cctx->sptr != (void *)-1)
		869	{
		870	# if CORO_STACKGUARD
		871	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		872	# endif
		873	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		874	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		875	cctx->flags \|= CC_MAPPED;
613	{	876	}
		877	else
		878	#endif
		879	{
		880	cctx->ssize = coro_stacksize * (long)sizeof (long);
		881	New (0, cctx->sptr, coro_stacksize, long);
		882
		883	if (!cctx->sptr)
		884	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	885	perror ("FATAL: unable to allocate stack for coroutine");
615	_exit (EXIT_FAILURE);	886	_exit (EXIT_FAILURE);
616	}	887	}
617		888
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	889	stack_start = cctx->sptr;
619		890	stack_size = cctx->ssize;
620	#else
621
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{	891	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630		892
631	#endif	893	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	894	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
634		895
635	return stack;	896	return cctx;
636	}	897	}
637		898
638	static void	899	static void
639	stack_free (coro_stack *stack)	900	cctx_destroy (coro_cctx *cctx)
640	{	901	{
641	if (!stack \|\| stack == main_stack)	902	if (!cctx)
642	return;	903	return;
643		904
		905	--cctx_count;
		906
		907	#if CORO_USE_VALGRIND
		908	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		909	#endif
		910
644	#if HAVE_MMAP	911	#if HAVE_MMAP
		912	if (cctx->flags & CC_MAPPED)
645	munmap (stack->sptr, stack->ssize);	913	munmap (cctx->sptr, cctx->ssize);
646	#else	914	else
		915	#endif
647	Safefree (stack->sptr);	916	Safefree (cctx->sptr);
648	#endif
649		917
650	Safefree (stack);	918	Safefree (cctx);
651	}	919	}
652		920
653	static coro_stack *stack_first;	921	static coro_cctx *
		922	cctx_get (pTHX)
		923	{
		924	while (cctx_first)
		925	{
		926	coro_cctx *cctx = cctx_first;
		927	cctx_first = cctx->next;
		928	--cctx_idle;
		929
		930	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		931	return cctx;
		932
		933	cctx_destroy (cctx);
		934	}
		935
		936	return cctx_new ();
		937	}
654		938
655	static void	939	static void
656	stack_get (struct coro *coro)	940	cctx_put (coro_cctx *cctx)
657	{	941	{
658	if (stack_first)	942	/* free another cctx if overlimit */
		943	if (cctx_idle >= MAX_IDLE_CCTX)
659	{	944	{
660	coro->stack = stack_first;	945	coro_cctx *first = cctx_first;
661	stack_first = stack_first->next;	946	cctx_first = first->next;
		947	--cctx_idle;
		948
		949	cctx_destroy (first);
		950	}
		951
		952	++cctx_idle;
		953	cctx->next = cctx_first;
		954	cctx_first = cctx;
		955	}
		956
		957	/ coroutine switching ***************************************************/
		958
		959	static void NOINLINE
		960	transfer_check (pTHX_ struct coro prev, struct coro next)
		961	{
		962	if (prev != next)
662	}	963	{
663	else	964	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
664	coro->stack = stack_new ();	965	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
665	}
666		966
667	static void	967	if (next->flags & CF_RUNNING)
668	stack_put (coro_stack *stack)	968	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
669	{
670	stack->next = stack_first;
671	stack_first = stack;
672	}
673		969
674	/* never call directly, always through the coro_state_transfer global variable */	970	if (next->flags & CF_DESTROYED)
675	static void	971	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		972
		973	if (PL_lex_state != LEX_NOTPARSING)
		974	croak ("Coro::State::transfer called while parsing, but this is not supported");
		975	}
		976	}
		977
		978	/* always use the TRANSFER macro */
		979	static void NOINLINE
676	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	980	transfer (pTHX_ struct coro prev, struct coro next)
677	{	981	{
678	dSTACKLEVEL;	982	dSTACKLEVEL;
679		983
680	/* sometimes transfer is only called to set idle_sp */	984	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	985	if (!next)
682	prev->stack->idle_sp = stacklevel;	986	{
683		987	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	988	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
685		989	}
686	if (prev != next)	990	else if (prev != next)
687	{	991	{
688	coro_stack *prev_stack = prev->stack;	992	coro_cctx *prev__cctx;
689		993
690	/* possibly "free" the stack */	994	if (prev->flags & CF_NEW)
691	if (prev_stack->idle_sp == stacklevel)
692	{	995	{
693	stack_put (prev_stack);	996	/* create a new empty context */
694	prev->stack = 0;	997	Newz (0, prev->cctx, 1, coro_cctx);
		998	prev->flags &= ~CF_NEW;
		999	prev->flags \|= CF_RUNNING;
695	}	1000	}
696		1001
697	if (next->mainstack)	1002	prev->flags &= ~CF_RUNNING;
		1003	next->flags \|= CF_RUNNING;
		1004
		1005	LOCK;
		1006
		1007	if (next->flags & CF_NEW)
698	{	1008	{
699	/* coroutine already started */	1009	/* need to start coroutine */
700	SAVE (prev, flags);	1010	next->flags &= ~CF_NEW;
701	LOAD (next);	1011	/* first get rid of the old state */
		1012	save_perl (aTHX_ prev);
		1013	/* setup coroutine call */
		1014	setup_coro (aTHX_ next);
702	}	1015	}
703	else	1016	else
704	{	1017	{
705	/* need to start coroutine */	1018	/* coroutine already started */
706	/* first get rid of the old state */	1019	save_perl (aTHX_ prev);
707	SAVE (prev, -1);	1020	load_perl (aTHX_ next);
708	/* setup coroutine call */
709	setup_coro (next);
710	/* need to change stack from main_stack to real one */
711	next->stack = 0;
712	}	1021	}
713		1022
		1023	prev__cctx = prev->cctx;
		1024
		1025	/* possibly "free" the cctx */
		1026	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
		1027	{
		1028	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1029	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1030
		1031	prev->cctx = 0;
		1032
		1033	cctx_put (prev__cctx);
		1034	}
		1035
		1036	++next->usecount;
		1037
714	if (!next->stack)	1038	if (!next->cctx)
715	stack_get (next);	1039	next->cctx = cctx_get (aTHX);
716		1040
717	if (prev_stack != next->stack)	1041	if (prev__cctx != next->cctx)
		1042	{
		1043	prev__cctx->top_env = PL_top_env;
		1044	PL_top_env = next->cctx->top_env;
718	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1045	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
719	}	1046	}
720		1047
721	transfer_tail ();	1048	free_coro_mortal (aTHX);
		1049	UNLOCK;
		1050	}
722	}	1051	}
723		1052
724	/* use this function pointer to call the above function */	1053	struct transfer_args
725	/* this is done to increase chances of the compiler not inlining the call */	1054	{
726	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	1055	struct coro prev, next;
		1056	};
727		1057
		1058	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1059	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1060
		1061	/ high level stuff ******************************************************/
		1062
728	static void	1063	static int
729	coro_state_destroy (struct coro *coro)	1064	coro_state_destroy (pTHX_ struct coro *coro)
730	{	1065	{
731	if (coro->refcnt--)	1066	if (coro->flags & CF_DESTROYED)
732	return;	1067	return 0;
		1068
		1069	coro->flags \|= CF_DESTROYED;
		1070
		1071	if (coro->flags & CF_READY)
		1072	{
		1073	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1074	/* alternative: look through all ready queues and remove the coro */
		1075	LOCK;
		1076	--coro_nready;
		1077	UNLOCK;
		1078	}
		1079	else
		1080	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
733		1081
734	if (coro->mainstack && coro->mainstack != main_mainstack)	1082	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	1083	{
736	struct coro temp;	1084	struct coro temp;
737		1085
738	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1086	if (coro->flags & CF_RUNNING)
		1087	croak ("FATAL: tried to destroy currently running coroutine");
		1088
		1089	Zero (&temp, 1, struct coro);
		1090	temp.save = CORO_SAVE_ALL;
		1091
		1092	save_perl (aTHX_ &temp);
739	LOAD (aTHX_ coro);	1093	load_perl (aTHX_ coro);
740		1094
741	destroy_stacks (aTHX);	1095	coro_destroy_stacks (aTHX);
742		1096
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1097	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
744		1098
745	coro->mainstack = 0;	1099	coro->mainstack = 0;
746	}	1100	}
747		1101
748	stack_free (coro->stack);	1102	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	1103	SvREFCNT_dec (coro->args);
750	Safefree (coro);	1104
		1105	if (coro->next) coro->next->prev = coro->prev;
		1106	if (coro->prev) coro->prev->next = coro->next;
		1107	if (coro == coro_first) coro_first = coro->next;
		1108
		1109	return 1;
751	}	1110	}
752		1111
753	static int	1112	static int
754	coro_state_clear (SV sv, MAGIC mg)	1113	coro_state_free (pTHX_ SV sv, MAGIC mg)
755	{	1114	{
756	struct coro coro = (struct coro )mg->mg_ptr;	1115	struct coro coro = (struct coro )mg->mg_ptr;
757	mg->mg_ptr = 0;	1116	mg->mg_ptr = 0;
758		1117
		1118	coro->hv = 0;
		1119
		1120	if (--coro->refcnt < 0)
		1121	{
759	coro_state_destroy (coro);	1122	coro_state_destroy (aTHX_ coro);
		1123	Safefree (coro);
		1124	}
760		1125
761	return 0;	1126	return 0;
762	}	1127	}
763		1128
764	static int	1129	static int
765	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1130	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
766	{	1131	{
767	struct coro coro = (struct coro )mg->mg_ptr;	1132	struct coro coro = (struct coro )mg->mg_ptr;
768		1133
769	++coro->refcnt;	1134	++coro->refcnt;
770		1135
771	return 0;	1136	return 0;
772	}	1137	}
773		1138
774	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1139	static MGVTBL coro_state_vtbl = {
775		1140	0, 0, 0, 0,
776	static struct coro *	1141	coro_state_free,
777	SvSTATE (SV *coro)	1142	0,
778	{	1143	#ifdef MGf_DUP
779	HV *stash;	1144	coro_state_dup,
780	MAGIC *mg;	1145	#else
781		1146	# define MGf_DUP 0
782	if (SvROK (coro))	1147	#endif
783	coro = SvRV (coro);	1148	};
784
785	stash = SvSTASH (coro);
786	if (stash != coro_stash && stash != coro_state_stash)
787	{
788	/* very slow, but rare, check */
789	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
790	croak ("Coro::State object required");
791	}
792
793	mg = SvMAGIC (coro);
794	assert (mg->mg_type == PERL_MAGIC_ext);
795	return (struct coro *)mg->mg_ptr;
796	}
797		1149
798	static void	1150	static void
		1151	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1152	{
		1153	ta->prev = SvSTATE (prev_sv);
		1154	ta->next = SvSTATE (next_sv);
		1155	TRANSFER_CHECK (*ta);
		1156	}
		1157
		1158	static void
799	api_transfer (pTHX_ SV prev, SV next, int flags)	1159	api_transfer (SV prev_sv, SV next_sv)
800	{	1160	{
801	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1161	dTHX;
		1162	struct transfer_args ta;
		1163
		1164	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1165	TRANSFER (ta);
		1166	}
		1167
		1168	static int
		1169	api_save (SV *coro_sv, int new_save)
		1170	{
		1171	dTHX;
		1172	struct coro *coro = SvSTATE (coro_sv);
		1173	int old_save = coro->save;
		1174
		1175	if (new_save >= 0)
		1176	coro->save = new_save;
		1177
		1178	return old_save;
802	}	1179	}
803		1180
804	/ Coro ******************************************************************/	1181	/ Coro ******************************************************************/
805		1182
806	#define PRIO_MAX 3
807	#define PRIO_HIGH 1
808	#define PRIO_NORMAL 0
809	#define PRIO_LOW -1
810	#define PRIO_IDLE -3
811	#define PRIO_MIN -4
812
813	/* for Coro.pm */
814	static GV coro_current, coro_idle;
815	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;
817
818	static void	1183	static void
819	coro_enq (pTHX_ SV *sv)	1184	coro_enq (pTHX_ SV *coro_sv)
820	{	1185	{
821	int prio;
822
823	if (SvTYPE (sv) != SVt_PVHV)
824	croak ("Coro::ready tried to enqueue something that is not a coroutine");
825
826	prio = SvSTATE (sv)->prio;
827
828	av_push (coro_ready [prio - PRIO_MIN], sv);	1186	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
829	coro_nready++;
830	}	1187	}
831		1188
832	static SV *	1189	static SV *
833	coro_deq (pTHX_ int min_prio)	1190	coro_deq (pTHX_ int min_prio)
834	{	1191	{
…		…
838	if (min_prio < 0)	1195	if (min_prio < 0)
839	min_prio = 0;	1196	min_prio = 0;
840		1197
841	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1198	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
842	if (AvFILLp (coro_ready [prio]) >= 0)	1199	if (AvFILLp (coro_ready [prio]) >= 0)
843	{
844	coro_nready--;
845	return av_shift (coro_ready [prio]);	1200	return av_shift (coro_ready [prio]);
846	}
847		1201
848	return 0;	1202	return 0;
849	}	1203	}
850		1204
		1205	static int
		1206	api_ready (SV *coro_sv)
		1207	{
		1208	dTHX;
		1209	struct coro *coro;
		1210
		1211	if (SvROK (coro_sv))
		1212	coro_sv = SvRV (coro_sv);
		1213
		1214	coro = SvSTATE (coro_sv);
		1215
		1216	if (coro->flags & CF_READY)
		1217	return 0;
		1218
		1219	coro->flags \|= CF_READY;
		1220
		1221	LOCK;
		1222	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1223	++coro_nready;
		1224	UNLOCK;
		1225
		1226	return 1;
		1227	}
		1228
		1229	static int
		1230	api_is_ready (SV *coro_sv)
		1231	{
		1232	dTHX;
		1233	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1234	}
		1235
851	static void	1236	static void
852	api_ready (SV *coro)	1237	prepare_schedule (pTHX_ struct transfer_args *ta)
853	{	1238	{
854	dTHX;	1239	SV prev_sv, next_sv;
855		1240
856	if (SvROK (coro))	1241	for (;;)
857	coro = SvRV (coro);	1242	{
		1243	LOCK;
		1244	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1245
		1246	/* nothing to schedule: call the idle handler */
		1247	if (!next_sv)
		1248	{
		1249	dSP;
		1250	UNLOCK;
		1251
		1252	ENTER;
		1253	SAVETMPS;
		1254
		1255	PUSHMARK (SP);
		1256	PUTBACK;
		1257	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1258
		1259	FREETMPS;
		1260	LEAVE;
		1261	continue;
		1262	}
		1263
		1264	ta->next = SvSTATE (next_sv);
		1265
		1266	/* cannot transfer to destroyed coros, skip and look for next */
		1267	if (ta->next->flags & CF_DESTROYED)
		1268	{
		1269	UNLOCK;
		1270	SvREFCNT_dec (next_sv);
		1271	/* coro_nready is already taken care of by destroy */
		1272	continue;
		1273	}
		1274
		1275	--coro_nready;
		1276	UNLOCK;
		1277	break;
		1278	}
		1279
		1280	/* free this only after the transfer */
		1281	prev_sv = SvRV (coro_current);
		1282	ta->prev = SvSTATE (prev_sv);
		1283	TRANSFER_CHECK (*ta);
		1284	assert (ta->next->flags & CF_READY);
		1285	ta->next->flags &= ~CF_READY;
		1286	SvRV_set (coro_current, next_sv);
858		1287
859	LOCK;	1288	LOCK;
860	coro_enq (aTHX_ SvREFCNT_inc (coro));	1289	free_coro_mortal (aTHX);
		1290	coro_mortal = prev_sv;
861	UNLOCK;	1291	UNLOCK;
		1292	}
		1293
		1294	static void
		1295	prepare_cede (pTHX_ struct transfer_args *ta)
		1296	{
		1297	api_ready (coro_current);
		1298	prepare_schedule (aTHX_ ta);
		1299	}
		1300
		1301	static int
		1302	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1303	{
		1304	if (coro_nready)
		1305	{
		1306	SV *prev = SvRV (coro_current);
		1307	prepare_schedule (aTHX_ ta);
		1308	api_ready (prev);
		1309	return 1;
		1310	}
		1311	else
		1312	return 0;
862	}	1313	}
863		1314
864	static void	1315	static void
865	api_schedule (void)	1316	api_schedule (void)
866	{	1317	{
867	dTHX;	1318	dTHX;
		1319	struct transfer_args ta;
868		1320
869	SV prev, next;	1321	prepare_schedule (aTHX_ &ta);
870	SV *current = GvSV (coro_current);	1322	TRANSFER (ta);
		1323	}
871		1324
872	for (;;)	1325	static int
873	{	1326	api_cede (void)
874	LOCK;	1327	{
		1328	dTHX;
		1329	struct transfer_args ta;
875		1330
876	next = coro_deq (aTHX_ PRIO_MIN);	1331	prepare_cede (aTHX_ &ta);
877		1332
878	if (next)	1333	if (ta.prev != ta.next)
879	break;
880
881	UNLOCK;
882
883	{	1334	{
884	dSP;	1335	TRANSFER (ta);
885		1336	return 1;
886	ENTER;
887	SAVETMPS;
888
889	PUSHMARK (SP);
890	PUTBACK;
891	call_sv (GvSV (coro_idle), G_DISCARD);
892
893	FREETMPS;
894	LEAVE;
895	}	1337	}
		1338	else
		1339	return 0;
		1340	}
		1341
		1342	static int
		1343	api_cede_notself (void)
		1344	{
		1345	dTHX;
		1346	struct transfer_args ta;
		1347
		1348	if (prepare_cede_notself (aTHX_ &ta))
896	}	1349	{
897		1350	TRANSFER (ta);
898	prev = SvRV (current);	1351	return 1;
899	SvRV (current) = next;	1352	}
900		1353	else
901	/* free this only after the transfer */	1354	return 0;
902	coro_mortal = prev;
903
904	UNLOCK;
905
906	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
907	}	1355	}
908
909	static int coro_cede_self;
910		1356
911	static void	1357	static void
912	api_cede (void)	1358	api_trace (SV *coro_sv, int flags)
913	{	1359	{
914	dTHX;	1360	dTHX;
915	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1361	struct coro *coro = SvSTATE (coro_sv);
916		1362
917	LOCK;	1363	if (flags & CC_TRACE)
918
919	if (coro_cede_self)
920	{
921	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
922	av_unshift (runqueue, 1);
923	av_store (runqueue, 0, current);
924	coro_nready++;
925	coro_cede_self = 0;
926	}	1364	{
		1365	if (!coro->cctx)
		1366	coro->cctx = cctx_new ();
		1367	else if (!(coro->cctx->flags & CC_TRACE))
		1368	croak ("cannot enable tracing on coroutine with custom stack");
		1369
		1370	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1371	}
		1372	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1373	{
		1374	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1375
		1376	if (coro->flags & CF_RUNNING)
		1377	PL_runops = RUNOPS_DEFAULT;
927	else	1378	else
928	coro_enq (aTHX_ current);	1379	coro->runops = RUNOPS_DEFAULT;
929		1380	}
930	UNLOCK;
931
932	api_schedule ();
933	}	1381	}
934		1382
935	MODULE = Coro::State PACKAGE = Coro::State	1383	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936		1384
937	PROTOTYPES: DISABLE	1385	PROTOTYPES: DISABLE
938		1386
939	BOOT:	1387	BOOT:
940	{	1388	{
…		…
943	#endif	1391	#endif
944	BOOT_PAGESIZE;	1392	BOOT_PAGESIZE;
945		1393
946	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1394	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
947		1395
		1396	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1397	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1400
948	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1401	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
949	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1402	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
950	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1403	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1404	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1405	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1406	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1407	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
951		1408
952	main_mainstack = PL_mainstack;	1409	main_mainstack = PL_mainstack;
		1410	main_top_env = PL_top_env;
		1411
		1412	while (main_top_env->je_prev)
		1413	main_top_env = main_top_env->je_prev;
953		1414
954	coroapi.ver = CORO_API_VERSION;	1415	coroapi.ver = CORO_API_VERSION;
955	coroapi.transfer = api_transfer;	1416	coroapi.transfer = api_transfer;
956
957	Newz (0, main_stack, 1, coro_stack);
958	main_stack->idle_sp = (void *)-1;
959		1417
960	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1418	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	}	1419	}
962		1420
963	SV *	1421	SV *
…		…
968	HV *hv;	1426	HV *hv;
969	int i;	1427	int i;
970		1428
971	Newz (0, coro, 1, struct coro);	1429	Newz (0, coro, 1, struct coro);
972	coro->args = newAV ();	1430	coro->args = newAV ();
		1431	coro->save = CORO_SAVE_DEF;
		1432	coro->flags = CF_NEW;
973		1433
		1434	if (coro_first) coro_first->prev = coro;
		1435	coro->next = coro_first;
		1436	coro_first = coro;
		1437
974	hv = newHV ();	1438	coro->hv = hv = newHV ();
975	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1439	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
976	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1440	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
977		1441
978	av_push (coro->args, newSVsv (RETVAL));
979	for (i = 1; i < items; i++)	1442	for (i = 1; i < items; i++)
980	av_push (coro->args, newSVsv (ST (i)));	1443	av_push (coro->args, newSVsv (ST (i)));
981
982	coro->stack = main_stack;
983	/coro->mainstack = 0; //actual work is done inside transfer /
984	/coro->stack = 0;/
985	}	1444	}
986	OUTPUT:	1445	OUTPUT:
987	RETVAL	1446	RETVAL
988		1447
		1448	int
		1449	save (SV *coro, int new_save = -1)
		1450	CODE:
		1451	RETVAL = api_save (coro, new_save);
		1452	OUTPUT:
		1453	RETVAL
		1454
		1455	int
		1456	save_also (SV *coro_sv, int save_also)
		1457	CODE:
		1458	{
		1459	struct coro *coro = SvSTATE (coro_sv);
		1460	RETVAL = coro->save;
		1461	coro->save \|= save_also;
		1462	}
		1463	OUTPUT:
		1464	RETVAL
		1465
		1466	# these not obviously related functions are all rolled into the same xs
		1467	# function to increase chances that they all will call transfer with the same
		1468	# stack offset
989	void	1469	void
990	transfer (prev, next, flags)	1470	_set_stacklevel (...)
991	SV *prev	1471	ALIAS:
992	SV *next	1472	Coro::State::transfer = 1
993	int flags	1473	Coro::schedule = 2
		1474	Coro::cede = 3
		1475	Coro::cede_notself = 4
994	CODE:	1476	CODE:
995	PUTBACK;
996	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
997	SPAGAIN;
998
999	int
1000	prio (Coro::State coro, int newprio = 0)
1001	ALIAS:
1002	nice = 1
1003	CODE:
1004	{	1477	{
1005	RETVAL = coro->prio;	1478	struct transfer_args ta;
1006		1479
1007	if (items > 1)	1480	switch (ix)
1008	{	1481	{
		1482	case 0:
		1483	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1484	ta.next = 0;
		1485	break;
		1486
		1487	case 1:
1009	if (ix)	1488	if (items != 2)
1010	newprio += coro->prio;	1489	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1011		1490
1012	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1491	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1013	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1492	break;
1014		1493
1015	coro->prio = newprio;	1494	case 2:
		1495	prepare_schedule (aTHX_ &ta);
		1496	break;
		1497
		1498	case 3:
		1499	prepare_cede (aTHX_ &ta);
		1500	break;
		1501
		1502	case 4:
		1503	if (!prepare_cede_notself (aTHX_ &ta))
		1504	XSRETURN_EMPTY;
		1505
		1506	break;
1016	}	1507	}
1017	}
1018		1508
1019	void	1509	BARRIER;
1020	_clear_idle_sp (Coro::State self)	1510	TRANSFER (ta);
		1511
		1512	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1513	XSRETURN_YES;
		1514	}
		1515
		1516	bool
		1517	_destroy (SV *coro_sv)
1021	CODE:	1518	CODE:
1022	self->stack->idle_sp = 0;	1519	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1023		1520	OUTPUT:
1024	void	1521	RETVAL
1025	_clone_state_from (SV dst, SV src)
1026	CODE:
1027	{
1028	struct coro *coro_src = SvSTATE (src);
1029
1030	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1031
1032	++coro_src->refcnt;
1033	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1034	}
1035		1522
1036	void	1523	void
1037	_exit (code)	1524	_exit (code)
1038	int code	1525	int code
1039	PROTOTYPE: $	1526	PROTOTYPE: $
1040	CODE:	1527	CODE:
1041	_exit (code);	1528	_exit (code);
1042		1529
1043	MODULE = Coro::State PACKAGE = Coro::Cont	1530	int
		1531	cctx_stacksize (int new_stacksize = 0)
		1532	CODE:
		1533	RETVAL = coro_stacksize;
		1534	if (new_stacksize)
		1535	coro_stacksize = new_stacksize;
		1536	OUTPUT:
		1537	RETVAL
		1538
		1539	int
		1540	cctx_count ()
		1541	CODE:
		1542	RETVAL = cctx_count;
		1543	OUTPUT:
		1544	RETVAL
		1545
		1546	int
		1547	cctx_idle ()
		1548	CODE:
		1549	RETVAL = cctx_idle;
		1550	OUTPUT:
		1551	RETVAL
1044		1552
1045	void	1553	void
1046	yield (...)	1554	list ()
1047	PROTOTYPE: @	1555	PPCODE:
		1556	{
		1557	struct coro *coro;
		1558	for (coro = coro_first; coro; coro = coro->next)
		1559	if (coro->hv)
		1560	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1561	}
		1562
		1563	void
		1564	call (Coro::State coro, SV *coderef)
		1565	ALIAS:
		1566	eval = 1
		1567	CODE:
		1568	{
		1569	if (coro->mainstack)
		1570	{
		1571	struct coro temp;
		1572	Zero (&temp, 1, struct coro);
		1573	temp.save = CORO_SAVE_ALL;
		1574
		1575	if (!(coro->flags & CF_RUNNING))
		1576	{
		1577	save_perl (aTHX_ &temp);
		1578	load_perl (aTHX_ coro);
		1579	}
		1580
		1581	{
		1582	dSP;
		1583	ENTER;
		1584	SAVETMPS;
		1585	PUSHMARK (SP);
		1586	PUTBACK;
		1587	if (ix)
		1588	eval_sv (coderef, 0);
		1589	else
		1590	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1591	SPAGAIN;
		1592	FREETMPS;
		1593	LEAVE;
		1594	PUTBACK;
		1595	}
		1596
		1597	if (!(coro->flags & CF_RUNNING))
		1598	{
		1599	save_perl (aTHX_ coro);
		1600	load_perl (aTHX_ &temp);
		1601	}
		1602	}
		1603	}
		1604
		1605	SV *
		1606	is_ready (Coro::State coro)
		1607	PROTOTYPE: $
		1608	ALIAS:
		1609	is_ready = CF_READY
		1610	is_running = CF_RUNNING
		1611	is_new = CF_NEW
		1612	is_destroyed = CF_DESTROYED
		1613	CODE:
		1614	RETVAL = boolSV (coro->flags & ix);
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618	void
		1619	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1620
		1621	SV *
		1622	has_stack (Coro::State coro)
		1623	PROTOTYPE: $
		1624	CODE:
		1625	RETVAL = boolSV (!!coro->cctx);
		1626	OUTPUT:
		1627	RETVAL
		1628
		1629	int
		1630	is_traced (Coro::State coro)
		1631	PROTOTYPE: $
		1632	CODE:
		1633	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1634	OUTPUT:
		1635	RETVAL
		1636
		1637	IV
		1638	rss (Coro::State coro)
		1639	PROTOTYPE: $
		1640	ALIAS:
		1641	usecount = 1
1048	CODE:	1642	CODE:
1049	{	1643	switch (ix)
1050	SV *yieldstack;	1644	{
1051	SV *sv;	1645	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1052	AV *defav = GvAV (PL_defgv);	1646	case 1: RETVAL = coro->usecount; break;
1053	struct coro prev, next;
1054
1055	yieldstack = *hv_fetch (
1056	(HV *)SvRV (GvSV (coro_current)),
1057	"yieldstack", sizeof ("yieldstack") - 1,
1058	0	1647	}
1059	);	1648	OUTPUT:
		1649	RETVAL
1060		1650
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	sv = av_pop ((AV *)SvRV (yieldstack));
1068	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1069	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1070	SvREFCNT_dec (sv);
1071
1072	coro_state_transfer (aTHX_ prev, next, 0);
1073	}
1074		1651
1075	MODULE = Coro::State PACKAGE = Coro	1652	MODULE = Coro::State PACKAGE = Coro
1076		1653
1077	BOOT:	1654	BOOT:
1078	{	1655	{
1079	int i;	1656	int i;
		1657
		1658	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1659	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1660	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1661
		1662	coro_current = get_sv ("Coro::current", FALSE);
		1663	SvREADONLY_on (coro_current);
1080		1664
1081	coro_stash = gv_stashpv ("Coro", TRUE);	1665	coro_stash = gv_stashpv ("Coro", TRUE);
1082		1666
1083	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1667	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1084	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1668	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1085	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1669	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1086	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1670	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1087	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1671	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1088	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1672	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1089		1673
1090	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1091	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1092
1093	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1674	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1094	coro_ready[i] = newAV ();	1675	coro_ready[i] = newAV ();
1095		1676
1096	{	1677	{
1097	SV *sv = perl_get_sv("Coro::API", 1);	1678	SV *sv = perl_get_sv("Coro::API", 1);
1098		1679
1099	coroapi.schedule = api_schedule;	1680	coroapi.schedule = api_schedule;
		1681	coroapi.save = api_save;
1100	coroapi.cede = api_cede;	1682	coroapi.cede = api_cede;
		1683	coroapi.cede_notself = api_cede_notself;
1101	coroapi.ready = api_ready;	1684	coroapi.ready = api_ready;
		1685	coroapi.is_ready = api_is_ready;
1102	coroapi.nready = &coro_nready;	1686	coroapi.nready = &coro_nready;
1103	coroapi.current = coro_current;	1687	coroapi.current = coro_current;
1104		1688
1105	GCoroAPI = &coroapi;	1689	GCoroAPI = &coroapi;
1106	sv_setiv (sv, (IV)&coroapi);	1690	sv_setiv (sv, (IV)&coroapi);
1107	SvREADONLY_on (sv);	1691	SvREADONLY_on (sv);
1108	}	1692	}
1109	}	1693	}
1110		1694
1111	void	1695	void
		1696	_set_current (SV *current)
		1697	PROTOTYPE: $
		1698	CODE:
		1699	SvREFCNT_dec (SvRV (coro_current));
		1700	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1701
		1702	int
		1703	prio (Coro::State coro, int newprio = 0)
		1704	ALIAS:
		1705	nice = 1
		1706	CODE:
		1707	{
		1708	RETVAL = coro->prio;
		1709
		1710	if (items > 1)
		1711	{
		1712	if (ix)
		1713	newprio = coro->prio - newprio;
		1714
		1715	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1716	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1717
		1718	coro->prio = newprio;
		1719	}
		1720	}
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	SV *
1112	ready (SV *self)	1725	ready (SV *self)
1113	PROTOTYPE: $	1726	PROTOTYPE: $
1114	CODE:	1727	CODE:
1115	api_ready (self);	1728	RETVAL = boolSV (api_ready (self));
		1729	OUTPUT:
		1730	RETVAL
1116		1731
1117	int	1732	int
1118	nready (...)	1733	nready (...)
1119	PROTOTYPE:	1734	PROTOTYPE:
1120	CODE:	1735	CODE:
1121	RETVAL = coro_nready;	1736	RETVAL = coro_nready;
1122	OUTPUT:	1737	OUTPUT:
1123	RETVAL	1738	RETVAL
1124		1739
		1740	# for async_pool speedup
1125	void	1741	void
1126	schedule (...)	1742	_pool_1 (SV *cb)
1127	PROTOTYPE:
1128	CODE:	1743	CODE:
1129	api_schedule ();	1744	{
		1745	int i, len;
		1746	HV hv = (HV )SvRV (coro_current);
		1747	AV *defav = GvAV (PL_defgv);
		1748	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1749	AV *invoke_av;
		1750
		1751	if (!invoke)
		1752	croak ("\3terminate\2\n");
		1753
		1754	hv_store (hv, "desc", sizeof ("desc") - 1,
		1755	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1756
		1757	invoke_av = (AV *)SvRV (invoke);
		1758	len = av_len (invoke_av);
		1759
		1760	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1761
		1762	if (len > 0)
		1763	{
		1764	av_fill (defav, len - 1);
		1765	for (i = 0; i < len; ++i)
		1766	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1767	}
		1768
		1769	SvREFCNT_dec (invoke);
		1770	}
1130		1771
1131	void	1772	void
1132	_set_cede_self ()	1773	_pool_2 (SV *cb)
1133	CODE:	1774	CODE:
1134	coro_cede_self = 1;	1775	{
		1776	struct coro *coro = SvSTATE (coro_current);
1135		1777
1136	void	1778	sv_setsv (cb, &PL_sv_undef);
1137	cede (...)	1779
1138	PROTOTYPE:	1780	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1139	CODE:	1781	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1140	api_cede ();	1782	croak ("\3terminate\2\n");
		1783
		1784	av_clear (GvAV (PL_defgv));
		1785	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1786	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1787
		1788	coro->save = CORO_SAVE_DEF;
		1789	coro->prio = 0;
		1790
		1791	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1792	api_trace (coro_current, 0);
		1793
		1794	av_push (av_async_pool, newSVsv (coro_current));
		1795	}
		1796
1141		1797
1142	MODULE = Coro::State PACKAGE = Coro::AIO	1798	MODULE = Coro::State PACKAGE = Coro::AIO
1143		1799
1144	SV *	1800	SV *
1145	_get_state ()	1801	_get_state ()
1146	CODE:	1802	CODE:
1147	{	1803	{
1148	struct {	1804	struct io_state *data;
1149	int errorno;
1150	int laststype;
1151	int laststatval;
1152	Stat_t statcache;
1153	} data;
1154		1805
		1806	RETVAL = newSV (sizeof (struct io_state));
		1807	data = (struct io_state *)SvPVX (RETVAL);
		1808	SvCUR_set (RETVAL, sizeof (struct io_state));
		1809	SvPOK_only (RETVAL);
		1810
1155	data.errorno = errno;	1811	data->errorno = errno;
1156	data.laststype = PL_laststype;	1812	data->laststype = PL_laststype;
1157	data.laststatval = PL_laststatval;	1813	data->laststatval = PL_laststatval;
1158	data.statcache = PL_statcache;	1814	data->statcache = PL_statcache;
1159
1160	RETVAL = newSVpvn ((char *)&data, sizeof data);
1161	}	1815	}
1162	OUTPUT:	1816	OUTPUT:
1163	RETVAL	1817	RETVAL
1164		1818
1165	void	1819	void
1166	_set_state (char *data_)	1820	_set_state (char *data_)
1167	PROTOTYPE: $	1821	PROTOTYPE: $
1168	CODE:	1822	CODE:
1169	{	1823	{
1170	struct {	1824	struct io_state data = (void )data_;
1171	int errorno;
1172	int laststype;
1173	int laststatval;
1174	Stat_t statcache;
1175	} data = (void )data_;
1176		1825
1177	errno = data->errorno;	1826	errno = data->errorno;
1178	PL_laststype = data->laststype;	1827	PL_laststype = data->laststype;
1179	PL_laststatval = data->laststatval;	1828	PL_laststatval = data->laststatval;
1180	PL_statcache = data->statcache;	1829	PL_statcache = data->statcache;
1181	}	1830	}
		1831

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Comparing Coro/Coro/State.xs (file contents): Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs. Revision 1.177 by root, Tue Oct 2 10:24:44 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs.
Revision 1.177 by root, Tue Oct 2 10:24:44 2007 UTC