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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.182 by root, Wed Oct 3 18:37:48 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 <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
34		79
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	81	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	82	#endif
53	# include <limits.h>	83
54	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	86	#endif
61	#endif
62		87
63	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&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
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		111
77	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	116	#else
82	# define LOCK (void)0	117	# define LOCK (void)0
83	# define UNLOCK (void)0	118	# define UNLOCK (void)0
84	#endif	119	#endif
85		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;
86	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
87	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;
88	static HV coro_state_stash, coro_stash;	134	static HV coro_state_stash, coro_stash;
89	static SV coro_mortal; / will be freed after next transfer */	135	static SV coro_mortal; / will be freed after next transfer */
90		136
		137	static GV irsgv; / $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
		144	static struct coro_cctx *cctx_first;
		145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		154	};
		155
91	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	157	typedef struct coro_cctx {
93	struct coro_stack *next;	158	struct coro_cctx *next;
94		159
95	void idle_sp; / original stacklevel when coroutine was created */	160	/* the stack */
96	void *sptr;	161	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
98		163
99	/* cpu state */	164	/* cpu state */
		165	void idle_sp; / sp of top-level transfer/schedule/cede call */
		166	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		167	JMPENV *top_env;
100	coro_context cctx;	168	coro_context cctx;
101	JMPENV *top_env;
102	} coro_stack;
103		169
104	/* the (fake) coro_stack representing the main program */	170	#if CORO_USE_VALGRIND
105	static coro_stack *main_stack;	171	int valgrind_id;
		172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
		175
		176	enum {
		177	CF_RUNNING = 0x0001, /* coroutine is running */
		178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		181	};
106		182
107	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
108	struct coro {	184	struct coro {
109	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
110	coro_stack *stack;	186	coro_cctx *cctx;
111		187
112	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
113	AV *args;	189	AV *args;
114	int refcnt;	190	int refcnt;
		191	int flags; /* CF_ flags */
115		192
116	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
117	AV *defav;	194	AV defav; / @_ */
118	SV *defsv;	195	SV defsv; / $_ */
119	SV *errsv;	196	SV errsv; / $@ */
		197	GV deffh; / default filehandle */
		198	SV irssv; / $/ */
		199	SV irssv_sv; / real $/ cache */
120		200
121	/* saved global state not related to stacks */	201	#define VAR(name,type) type name;
122	U8 dowarn;	202	# include "state.h"
123	I32 in_eval;	203	#undef VAR
124		204
125	/* the stacks and related info (callchain etc..) */	205	/* statistics */
126	PERL_SI *curstackinfo;	206	int usecount; /* number of transfers to this coro */
127	AV *curstack;
128	AV *mainstack;
129	SV **stack_sp;
130	OP *op;
131	SV **curpad;
132	AV *comppad;
133	CV *compcv;
134	SV **stack_base;
135	SV **stack_max;
136	SV **tmps_stack;
137	I32 tmps_floor;
138	I32 tmps_ix;
139	I32 tmps_max;
140	I32 *markstack;
141	I32 *markstack_ptr;
142	I32 *markstack_max;
143	I32 *scopestack;
144	I32 scopestack_ix;
145	I32 scopestack_max;
146	ANY *savestack;
147	I32 savestack_ix;
148	I32 savestack_max;
149	OP **retstack;
150	I32 retstack_ix;
151	I32 retstack_max;
152	PMOP *curpm;
153	COP *curcop;
154		207
155	/* coro process data */	208	/* coro process data */
156	int prio;	209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	GV *asp_deffh;
		214
		215	/* linked list */
		216	struct coro next, prev;
		217	HV hv; / the perl hash associated with this coro, if any */
157	};	218	};
158		219
159	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
161		222
		223	/ Coro ******************************************************************/
		224
		225	#define PRIO_MAX 3
		226	#define PRIO_HIGH 1
		227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
		231
		232	/* for Coro.pm */
		233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		235	static int coro_nready;
		236	static struct coro *coro_first;
		237
		238	/ lowlevel stuff ********************************************************/
		239
162	static AV *	240	static AV *
163	coro_clone_padlist (pTHX_ CV *cv)	241	coro_clone_padlist (pTHX_ CV *cv)
164	{	242	{
165	AV *padlist = CvPADLIST (cv);	243	AV *padlist = CvPADLIST (cv);
166	AV newpadlist, newpad;	244	AV newpadlist, newpad;
167		245
168	newpadlist = newAV ();	246	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
170	#if PERL_VERSION < 9	248	#if PERL_VERSION_ATLEAST (5,9,0)
		249	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		250	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	251	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
172	#else
173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174	#endif	252	#endif
175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	253	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176	--AvFILLp (padlist);	254	--AvFILLp (padlist);
177		255
178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	256	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
222		300
223	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
224		302
225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
226		304
		305	#define CORO_MAGIC(cv) \
		306	SvMAGIC (cv) \
		307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		308	? SvMAGIC (cv) \
		309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		310	: 0
		311
		312	static struct coro *
		313	SvSTATE_ (pTHX_ SV *coro)
		314	{
		315	HV *stash;
		316	MAGIC *mg;
		317
		318	if (SvROK (coro))
		319	coro = SvRV (coro);
		320
		321	if (SvTYPE (coro) != SVt_PVHV)
		322	croak ("Coro::State object required");
		323
		324	stash = SvSTASH (coro);
		325	if (stash != coro_stash && stash != coro_state_stash)
		326	{
		327	/* very slow, but rare, check */
		328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		329	croak ("Coro::State object required");
		330	}
		331
		332	mg = CORO_MAGIC (coro);
		333	return (struct coro *)mg->mg_ptr;
		334	}
		335
		336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		337
227	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
228	static void	339	static void
229	get_padlist (pTHX_ CV *cv)	340	get_padlist (pTHX_ CV *cv)
230	{	341	{
231	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
232		344
233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	347	else
236	{	348	{
237	#if 0	349	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this should work - but it doesn't :( */	350	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (aTHX_ cv);	351	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	352	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	353	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	354	SvREFCNT_dec (cp);
243	#else	355	#else
244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
247	}	359	}
248		360
249	static void	361	static void
250	put_padlist (pTHX_ CV *cv)	362	put_padlist (pTHX_ CV *cv)
251	{	363	{
252	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
253		366
254	if (!mg)	367	if (!mg)
255	{	368	{
256	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
257	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
258	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
259	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
260	}	373	}
261		374
262	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
263	}
264		376
265	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
266	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
267		379
268	#define LOAD(state) load_state(aTHX_ (state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	381	}
270		382
271	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/ load & save, init *****************************************************/
272		384
273	static void	385	static void
274	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
275	{	387	{
276	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
277	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
278		391
279	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
280	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
281	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
282	PL_stack_sp = c->stack_sp;	395	PL_defoutgv = c->deffh;
283	PL_op = c->op;	396	PL_rs = c->irssv;
284	PL_curpad = c->curpad;	397	GvSV (irsgv) = c->irssv_sv;
285	PL_comppad = c->comppad;
286	PL_compcv = c->compcv;
287	PL_stack_base = c->stack_base;
288	PL_stack_max = c->stack_max;
289	PL_tmps_stack = c->tmps_stack;
290	PL_tmps_floor = c->tmps_floor;
291	PL_tmps_ix = c->tmps_ix;
292	PL_tmps_max = c->tmps_max;
293	PL_markstack = c->markstack;
294	PL_markstack_ptr = c->markstack_ptr;
295	PL_markstack_max = c->markstack_max;
296	PL_scopestack = c->scopestack;
297	PL_scopestack_ix = c->scopestack_ix;
298	PL_scopestack_max = c->scopestack_max;
299	PL_savestack = c->savestack;
300	PL_savestack_ix = c->savestack_ix;
301	PL_savestack_max = c->savestack_max;
302	#if PERL_VERSION < 9
303	PL_retstack = c->retstack;
304	PL_retstack_ix = c->retstack_ix;
305	PL_retstack_max = c->retstack_max;
306	#endif
307	PL_curpm = c->curpm;
308	PL_curcop = c->curcop;
309
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
313		398
314	{	399	{
315	dSP;	400	dSP;
316	CV *cv;	401	CV *cv;
317		402
318	/* now do the ugly restore mess */	403	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	404	while ((cv = (CV *)POPs))
320	{	405	{
321	AV padlist = (AV )POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	406	put_padlist (aTHX_ cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	407	CvDEPTH (cv) = PTR2IV (POPs);
327	}	408	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	409	}
331		410
332	PUTBACK;	411	PUTBACK;
333	}	412	}
334	}	413	}
335		414
336	static void	415	static void
337	save_state(pTHX_ Coro__State c, int flags)	416	save_perl (pTHX_ Coro__State c)
338	{	417	{
339	{	418	{
340	dSP;	419	dSP;
341	I32 cxix = cxstack_ix;	420	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	421	PERL_CONTEXT *ccstk = cxstack;
…		…
345	/*	424	/*
346	* the worst thing you can imagine happens first - we have to save	425	* the worst thing you can imagine happens first - we have to save
347	* (and reinitialize) all cv's in the whole callchain :(	426	* (and reinitialize) all cv's in the whole callchain :(
348	*/	427	*/
349		428
350	PUSHs (Nullsv);	429	XPUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	430	/* this loop was inspired by pp_caller */
352	for (;;)	431	for (;;)
353	{	432	{
354	while (cxix >= 0)	433	while (cxix >= 0)
355	{	434	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	435	PERL_CONTEXT *cx = &ccstk[cxix--];
357		436
358	if (CxTYPE(cx) == CXt_SUB)	437	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
359	{	438	{
360	CV *cv = cx->blk_sub.cv;	439	CV *cv = cx->blk_sub.cv;
		440
361	if (CvDEPTH(cv))	441	if (CvDEPTH (cv))
362	{	442	{
363	EXTEND (SP, CvDEPTH(cv)*2);	443	EXTEND (SP, 3);
364
365	while (--CvDEPTH(cv))
366	{
367	/* this tells the restore code to increment CvDEPTH */
368	PUSHs (Nullsv);
369	PUSHs ((SV *)cv);
370	}
371
372	PUSHs ((SV *)CvPADLIST(cv));	444	PUSHs ((SV *)CvPADLIST (cv));
		445	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	446	PUSHs ((SV *)cv);
374		447
		448	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	449	get_padlist (aTHX_ cv);
376	}	450	}
377	}	451	}
378	#ifdef CXt_FORMAT
379	else if (CxTYPE(cx) == CXt_FORMAT)
380	{
381	/* I never used formats, so how should I know how these are implemented? */
382	/* my bold guess is as a simple, plain sub... */
383	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384	}
385	#endif
386	}	452	}
387		453
388	if (top_si->si_type == PERLSI_MAIN)	454	if (top_si->si_type == PERLSI_MAIN)
389	break;	455	break;
390		456
391	top_si = top_si->si_prev;	457	top_si = top_si->si_prev;
392	ccstk = top_si->si_cxstack;	458	ccstk = top_si->si_cxstack;
393	cxix = top_si->si_cxix;	459	cxix = top_si->si_cxix;
394	}	460	}
395		461
396	PUTBACK;	462	PUTBACK;
397	}	463	}
398		464
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	465	c->defav = GvAV (PL_defgv);
400	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	466	c->defsv = DEFSV;
401	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	467	c->errsv = ERRSV;
		468	c->deffh = PL_defoutgv;
		469	c->irssv = PL_rs;
		470	c->irssv_sv = GvSV (irsgv);
402		471
403	c->dowarn = PL_dowarn;	472	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	473	# include "state.h"
405		474	#undef VAR
406	c->curstackinfo = PL_curstackinfo;
407	c->curstack = PL_curstack;
408	c->mainstack = PL_mainstack;
409	c->stack_sp = PL_stack_sp;
410	c->op = PL_op;
411	c->curpad = PL_curpad;
412	c->comppad = PL_comppad;
413	c->compcv = PL_compcv;
414	c->stack_base = PL_stack_base;
415	c->stack_max = PL_stack_max;
416	c->tmps_stack = PL_tmps_stack;
417	c->tmps_floor = PL_tmps_floor;
418	c->tmps_ix = PL_tmps_ix;
419	c->tmps_max = PL_tmps_max;
420	c->markstack = PL_markstack;
421	c->markstack_ptr = PL_markstack_ptr;
422	c->markstack_max = PL_markstack_max;
423	c->scopestack = PL_scopestack;
424	c->scopestack_ix = PL_scopestack_ix;
425	c->scopestack_max = PL_scopestack_max;
426	c->savestack = PL_savestack;
427	c->savestack_ix = PL_savestack_ix;
428	c->savestack_max = PL_savestack_max;
429	#if PERL_VERSION < 9
430	c->retstack = PL_retstack;
431	c->retstack_ix = PL_retstack_ix;
432	c->retstack_max = PL_retstack_max;
433	#endif
434	c->curpm = PL_curpm;
435	c->curcop = PL_curcop;
436	}	475	}
437		476
438	/*	477	/*
439	* allocate various perl stacks. This is an exact copy	478	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	479	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	480	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	481	* not usually need a lot of stackspace.
443	*/	482	*/
		483	#if CORO_PREFER_PERL_FUNCTIONS
		484	# define coro_init_stacks init_stacks
		485	#else
444	static void	486	static void
445	coro_init_stacks (pTHX)	487	coro_init_stacks (pTHX)
446	{	488	{
447	LOCK;	489	PL_curstackinfo = new_stackinfo(64, 6);
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	490	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	491	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		493
454	PL_stack_base = AvARRAY(PL_curstack);	494	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	495	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	496	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		497
458	New(50,PL_tmps_stack,96,SV*);	498	New(50,PL_tmps_stack,64,SV*);
459	PL_tmps_floor = -1;	499	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	500	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	501	PL_tmps_max = 64;
462		502
463	New(54,PL_markstack,16,I32);	503	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	504	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	505	PL_markstack_max = PL_markstack + 16;
466		506
…		…
470		510
471	New(54,PL_scopestack,16,I32);	511	New(54,PL_scopestack,16,I32);
472	PL_scopestack_ix = 0;	512	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	513	PL_scopestack_max = 16;
474		514
475	New(54,PL_savestack,96,ANY);	515	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	516	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	517	PL_savestack_max = 64;
478		518
479	#if PERL_VERSION < 9	519	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	520	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	521	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	522	PL_retstack_max = 4;
483	#endif	523	#endif
484
485	UNLOCK;
486	}	524	}
		525	#endif
487		526
488	/*	527	/*
489	* destroy the stacks, the callchain etc...	528	* destroy the stacks, the callchain etc...
490	*/	529	*/
491	static void	530	static void
492	destroy_stacks(pTHX)	531	coro_destroy_stacks (pTHX)
493	{	532	{
494	if (!IN_DESTRUCT)
495	{
496	/* is this ugly, I ask? */
497	LEAVE_SCOPE (0);
498
499	/* sure it is, but more important: is it correct?? :/ */
500	FREETMPS;
501
502	/POPSTACK_TO (PL_mainstack);//D//use/
503	}
504
505	while (PL_curstackinfo->si_next)	533	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	534	PL_curstackinfo = PL_curstackinfo->si_next;
507		535
508	while (PL_curstackinfo)	536	while (PL_curstackinfo)
509	{	537	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	538	PERL_SI *p = PL_curstackinfo->si_prev;
511		539
512	{ /D//remove/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	540	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/D//remove/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	541	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		542
524	Safefree (PL_curstackinfo->si_cxstack);	543	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	544	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	545	PL_curstackinfo = p;
527	}	546	}
528		547
529	Safefree (PL_tmps_stack);	548	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	549	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	550	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	551	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	552	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	553	Safefree (PL_retstack);
535	#endif	554	#endif
536	}	555	}
537		556
538	static void	557	static size_t
539	setup_coro (struct coro *coro)	558	coro_rss (pTHX_ struct coro *coro)
		559	{
		560	size_t rss = sizeof (coro);
		561
		562	if (coro->mainstack)
		563	{
		564	if (coro->flags & CF_RUNNING)
		565	{
		566	#define VAR(name,type)coro->name = PL_ ## name;
		567	# include "state.h"
		568	#undef VAR
		569	}
		570
		571	rss += sizeof (coro->curstackinfo);
		572	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		573	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		574	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		575	rss += coro->tmps_max * sizeof (SV *);
		576	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		577	rss += coro->scopestack_max * sizeof (I32);
		578	rss += coro->savestack_max * sizeof (ANY);
		579
		580	#if !PERL_VERSION_ATLEAST (5,9,0)
		581	rss += coro->retstack_max * sizeof (OP *);
		582	#endif
		583	}
		584
		585	return rss;
		586	}
		587
		588	/ coroutine stack handling **********************************************/
		589
		590	static void
		591	coro_setup (pTHX_ struct coro *coro)
540	{	592	{
541	/*	593	/*
542	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
543	*/	595	*/
544	dTHX;	596	coro_init_stacks (aTHX);
		597
		598	PL_runops = RUNOPS_DEFAULT;
		599	PL_curcop = &PL_compiling;
		600	PL_in_eval = EVAL_NULL;
		601	PL_comppad = 0;
		602	PL_curpm = 0;
		603	PL_localizing = 0;
		604	PL_dirty = 0;
		605	PL_restartop = 0;
		606
		607	GvSV (PL_defgv) = NEWSV (0, 0);
		608	GvAV (PL_defgv) = coro->args; coro->args = 0;
		609	GvSV (PL_errgv) = NEWSV (0, 0);
		610	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		611	PL_rs = newSVsv (GvSV (irsgv));
		612
		613	{
		614	IO *io = newIO ();
		615	PL_defoutgv = newGVgen ("Coro");
		616	GvIOp(PL_defoutgv) = io;
		617	IoTYPE (io) = IoTYPE_WRONLY;
		618	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		619	IoFLAGS (io) \|= IOf_FLUSH;
		620	}
		621
		622	{
		623	dSP;
		624	LOGOP myop;
		625
		626	Zero (&myop, 1, LOGOP);
		627	myop.op_next = Nullop;
		628	myop.op_flags = OPf_WANT_VOID;
		629
		630	PUSHMARK (SP);
		631	XPUSHs (av_shift (GvAV (PL_defgv)));
		632	PUTBACK;
		633	PL_op = (OP *)&myop;
		634	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		635	SPAGAIN;
		636	}
		637
		638	ENTER; /* necessary e.g. for dounwind */
		639	}
		640
		641	static void
		642	coro_destroy (pTHX_ struct coro *coro)
		643	{
		644	if (!IN_DESTRUCT)
		645	{
		646	/* restore all saved variables and stuff */
		647	LEAVE_SCOPE (0);
		648	assert (PL_tmps_floor == -1);
		649
		650	/* free all temporaries */
		651	FREETMPS;
		652	assert (PL_tmps_ix == -1);
		653
		654	/* unwind all extra stacks */
		655	POPSTACK_TO (PL_mainstack);
		656
		657	/* unwind main stack */
		658	dounwind (-1);
		659	}
		660
		661	SvREFCNT_dec (GvSV (PL_defgv));
		662	SvREFCNT_dec (GvAV (PL_defgv));
		663	SvREFCNT_dec (GvSV (PL_errgv));
		664	SvREFCNT_dec (PL_defoutgv);
		665	SvREFCNT_dec (PL_rs);
		666	SvREFCNT_dec (GvSV (irsgv));
		667
		668	SvREFCNT_dec (coro->asp_deffh);
		669	//SvREFCNT_dec (coro->throw);
		670
		671	coro_destroy_stacks (aTHX);
		672	}
		673
		674	static void
		675	free_coro_mortal (pTHX)
		676	{
		677	if (coro_mortal)
		678	{
		679	SvREFCNT_dec (coro_mortal);
		680	coro_mortal = 0;
		681	}
		682	}
		683
		684	static int
		685	runops_trace (pTHX)
		686	{
		687	COP *oldcop = 0;
		688	int oldcxix = -2;
		689	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		690	coro_cctx *cctx = coro->cctx;
		691
		692	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		693	{
		694	PERL_ASYNC_CHECK ();
		695
		696	if (cctx->flags & CC_TRACE_ALL)
		697	{
		698	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		699	{
		700	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		701	SV bot, top;
		702	AV av = newAV (); / return values */
		703	SV **cb;
		704	dSP;
		705
		706	GV *gv = CvGV (cx->blk_sub.cv);
		707	SV *fullname = sv_2mortal (newSV (0));
		708	if (isGV (gv))
		709	gv_efullname3 (fullname, gv, 0);
		710
		711	bot = PL_stack_base + cx->blk_oldsp + 1;
		712	top = cx->blk_gimme == G_ARRAY ? SP + 1
		713	: cx->blk_gimme == G_SCALAR ? bot + 1
		714	: bot;
		715
		716	while (bot < top)
		717	av_push (av, SvREFCNT_inc (*bot++));
		718
		719	PL_runops = RUNOPS_DEFAULT;
		720	ENTER;
		721	SAVETMPS;
		722	EXTEND (SP, 3);
		723	PUSHMARK (SP);
		724	PUSHs (&PL_sv_no);
		725	PUSHs (fullname);
		726	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		727	PUTBACK;
		728	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		729	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		730	SPAGAIN;
		731	FREETMPS;
		732	LEAVE;
		733	PL_runops = runops_trace;
		734	}
		735
		736	if (oldcop != PL_curcop)
		737	{
		738	oldcop = PL_curcop;
		739
		740	if (PL_curcop != &PL_compiling)
		741	{
		742	SV **cb;
		743
		744	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		745	{
		746	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		747
		748	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		749	{
		750	runops_proc_t old_runops = PL_runops;
		751	dSP;
		752	GV *gv = CvGV (cx->blk_sub.cv);
		753	SV *fullname = sv_2mortal (newSV (0));
		754
		755	if (isGV (gv))
		756	gv_efullname3 (fullname, gv, 0);
		757
		758	PL_runops = RUNOPS_DEFAULT;
		759	ENTER;
		760	SAVETMPS;
		761	EXTEND (SP, 3);
		762	PUSHMARK (SP);
		763	PUSHs (&PL_sv_yes);
		764	PUSHs (fullname);
		765	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		766	PUTBACK;
		767	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		768	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		769	SPAGAIN;
		770	FREETMPS;
		771	LEAVE;
		772	PL_runops = runops_trace;
		773	}
		774
		775	oldcxix = cxstack_ix;
		776	}
		777
		778	if (cctx->flags & CC_TRACE_LINE)
		779	{
		780	dSP;
		781
		782	PL_runops = RUNOPS_DEFAULT;
		783	ENTER;
		784	SAVETMPS;
		785	EXTEND (SP, 3);
		786	PL_runops = RUNOPS_DEFAULT;
		787	PUSHMARK (SP);
		788	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		789	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		790	PUTBACK;
		791	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		792	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		793	SPAGAIN;
		794	FREETMPS;
		795	LEAVE;
		796	PL_runops = runops_trace;
		797	}
		798	}
		799	}
		800	}
		801	}
		802
		803	TAINT_NOT;
		804	return 0;
		805	}
		806
		807	/* inject a fake call to Coro::State::_cctx_init into the execution */
		808	/* _cctx_init should be careful, as it could be called at almost any time */
		809	/* during execution of a perl program */
		810	static void NOINLINE
		811	prepare_cctx (pTHX_ coro_cctx *cctx)
		812	{
545	dSP;	813	dSP;
546	UNOP myop;	814	LOGOP myop;
547	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
548		815
549	coro_init_stacks (aTHX);	816	PL_top_env = &PL_start_env;
550	/PL_curcop = 0;/
551	/PL_in_eval = PL_in_eval;/ /* inherit */
552	SvREFCNT_dec (GvAV (PL_defgv));
553	GvAV (PL_defgv) = coro->args; coro->args = 0;
554		817
555	SPAGAIN;	818	if (cctx->flags & CC_TRACE)
		819	PL_runops = runops_trace;
556		820
557	Zero (&myop, 1, UNOP);	821	Zero (&myop, 1, LOGOP);
558	myop.op_next = Nullop;	822	myop.op_next = PL_op;
559	myop.op_flags = OPf_WANT_VOID;	823	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
560		824
		825	PUSHMARK (SP);
		826	EXTEND (SP, 2);
		827	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		828	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		829	PUTBACK;
561	PL_op = (OP *)&myop;	830	PL_op = (OP *)&myop;
562
563	PUSHMARK(SP);
564	XPUSHs (sub_init);
565	PUTBACK;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	831	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	832	SPAGAIN;
568
569	ENTER; /* necessary e.g. for dounwind */
570	}	833	}
571		834
572	static void	835	/*
573	free_coro_mortal ()	836	* this is a _very_ stripped down perl interpreter ;)
574	{	837	*/
575	if (coro_mortal)
576	{
577	SvREFCNT_dec (coro_mortal);
578	coro_mortal = 0;
579	}
580	}
581
582	static void	838	static void
583	coro_run (void *arg)	839	coro_run (void *arg)
584	{	840	{
		841	dTHX;
		842
		843	/* coro_run is the alternative tail of transfer(), so unlock here. */
		844	UNLOCK;
		845
		846	/* we now skip the entersub that lead to transfer() */
		847	PL_op = PL_op->op_next;
		848
		849	/* inject a fake subroutine call to cctx_init */
		850	prepare_cctx (aTHX_ (coro_cctx *)arg);
		851
		852	/* somebody or something will hit me for both perl_run and PL_restartop */
		853	PL_restartop = PL_op;
		854	perl_run (PL_curinterp);
		855
585	/*	856	/*
586	* this is a _very_ stripped down perl interpreter ;)	857	* If perl-run returns we assume exit() was being called or the coro
		858	* fell off the end, which seems to be the only valid (non-bug)
		859	* reason for perl_run to return. We try to exit by jumping to the
		860	* bootstrap-time "top" top_env, as we cannot restore the "main"
		861	* coroutine as Coro has no such concept
587	*/	862	*/
588	dTHX;
589	PL_top_env = &PL_start_env;	863	PL_top_env = main_top_env;
590		864	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
591	UNLOCK;
592
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restart_op */
598	perl_run (aTHX_ PERL_GET_CONTEXT);
599
600	abort ();
601	}	865	}
602		866
603	static coro_stack *	867	static coro_cctx *
604	stack_new ()	868	cctx_new ()
605	{	869	{
606	coro_stack *stack;	870	coro_cctx *cctx;
		871	void *stack_start;
		872	size_t stack_size;
607		873
		874	++cctx_count;
		875
608	New (0, stack, 1, coro_stack);	876	Newz (0, cctx, 1, coro_cctx);
609		877
610	#if HAVE_MMAP	878	#if HAVE_MMAP
611		879
612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	880	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		881	/* mmap supposedly does allocate-on-write for us */
613	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	882	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
614		883
615	if (stack->sptr == (void *)-1)	884	if (cctx->sptr != (void *)-1)
		885	{
		886	# if CORO_STACKGUARD
		887	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		888	# endif
		889	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		890	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		891	cctx->flags \|= CC_MAPPED;
616	{	892	}
		893	else
		894	#endif
		895	{
		896	cctx->ssize = coro_stacksize * (long)sizeof (long);
		897	New (0, cctx->sptr, coro_stacksize, long);
		898
		899	if (!cctx->sptr)
		900	{
617	perror ("FATAL: unable to mmap stack for coroutine");	901	perror ("FATAL: unable to allocate stack for coroutine");
618	_exit (EXIT_FAILURE);	902	_exit (EXIT_FAILURE);
619	}	903	}
620		904
621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	905	stack_start = cctx->sptr;
622		906	stack_size = cctx->ssize;
623	#else
624
625	stack->ssize = STACKSIZE * (long)sizeof (long);
626	New (0, stack->sptr, STACKSIZE, long);
627
628	if (!stack->sptr)
629	{	907	}
630	perror (stderr, "FATAL: unable to malloc stack for coroutine");
631	_exit (EXIT_FAILURE);
632	}
633		908
634	#endif	909	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
635
636	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	910	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
637		911
638	return stack;	912	return cctx;
639	}	913	}
640		914
641	static void	915	static void
642	stack_free (coro_stack *stack)	916	cctx_destroy (coro_cctx *cctx)
643	{	917	{
644	if (!stack \|\| stack == main_stack)	918	if (!cctx)
645	return;	919	return;
646		920
		921	--cctx_count;
		922
		923	#if CORO_USE_VALGRIND
		924	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		925	#endif
		926
647	#if HAVE_MMAP	927	#if HAVE_MMAP
		928	if (cctx->flags & CC_MAPPED)
648	munmap (stack->sptr, stack->ssize);	929	munmap (cctx->sptr, cctx->ssize);
649	#else
650	Safefree (stack->sptr);
651	#endif
652
653	Safefree (stack);
654	}
655
656	static coro_stack *stack_first;
657
658	static coro_stack *
659	stack_get ()
660	{
661	coro_stack *stack;
662
663	if (stack_first)
664	{
665	stack = stack_first;
666	stack_first = stack->next;
667	}
668	else	930	else
		931	#endif
		932	Safefree (cctx->sptr);
		933
		934	Safefree (cctx);
		935	}
		936
		937	static coro_cctx *
		938	cctx_get (pTHX)
		939	{
		940	while (cctx_first)
669	{	941	{
670	stack = stack_new ();	942	coro_cctx *cctx = cctx_first;
671	PL_op = PL_op->op_next;	943	cctx_first = cctx->next;
		944	--cctx_idle;
		945
		946	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		947	return cctx;
		948
		949	cctx_destroy (cctx);
672	}	950	}
673		951
674	return stack;	952	return cctx_new ();
675	}	953	}
676		954
677	static void	955	static void
678	stack_put (coro_stack *stack)	956	cctx_put (coro_cctx *cctx)
679	{	957	{
680	stack->next = stack_first;	958	/* free another cctx if overlimit */
681	stack_first = stack;	959	if (cctx_idle >= MAX_IDLE_CCTX)
682	}	960	{
		961	coro_cctx *first = cctx_first;
		962	cctx_first = first->next;
		963	--cctx_idle;
683		964
684	/* never call directly, always through the coro_state_transfer global variable */	965	cctx_destroy (first);
685	static void	966	}
		967
		968	++cctx_idle;
		969	cctx->next = cctx_first;
		970	cctx_first = cctx;
		971	}
		972
		973	/ coroutine switching ***************************************************/
		974
		975	static void NOINLINE
		976	transfer_check (pTHX_ struct coro prev, struct coro next)
		977	{
		978	if (prev != next)
		979	{
		980	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		981	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		982
		983	if (next->flags & CF_RUNNING)
		984	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		985
		986	if (next->flags & CF_DESTROYED)
		987	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		988
		989	if (PL_lex_state != LEX_NOTPARSING)
		990	croak ("Coro::State::transfer called while parsing, but this is not supported");
		991	}
		992	}
		993
		994	/* always use the TRANSFER macro */
		995	static void NOINLINE
686	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	996	transfer (pTHX_ struct coro prev, struct coro next)
687	{	997	{
688	dSTACKLEVEL;	998	dSTACKLEVEL;
689		999
690	/* sometimes transfer is only called to set idle_sp */	1000	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	1001	if (!next)
		1002	{
692	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1003	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1004	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1005	}
693	else if (prev != next)	1006	else if (prev != next)
694	{	1007	{
695	coro_stack *prev__stack;	1008	coro_cctx *prev__cctx;
		1009
		1010	if (prev->flags & CF_NEW)
		1011	{
		1012	/* create a new empty context */
		1013	Newz (0, prev->cctx, 1, coro_cctx);
		1014	prev->flags &= ~CF_NEW;
		1015	prev->flags \|= CF_RUNNING;
		1016	}
		1017
		1018	prev->flags &= ~CF_RUNNING;
		1019	next->flags \|= CF_RUNNING;
696		1020
697	LOCK;	1021	LOCK;
698		1022
699	if (next->mainstack)	1023	if (next->flags & CF_NEW)
700	{	1024	{
701	/* coroutine already started */	1025	/* need to start coroutine */
702	SAVE (prev, flags);	1026	next->flags &= ~CF_NEW;
703	LOAD (next);	1027	/* first get rid of the old state */
		1028	save_perl (aTHX_ prev);
		1029	/* setup coroutine call */
		1030	coro_setup (aTHX_ next);
704	}	1031	}
705	else	1032	else
706	{	1033	{
707	/* need to start coroutine */	1034	/* coroutine already started */
708	/* first get rid of the old state */	1035	save_perl (aTHX_ prev);
709	SAVE (prev, -1);	1036	load_perl (aTHX_ next);
710	/* setup coroutine call */
711	setup_coro (next);
712	/* need a stack */
713	next->stack = 0;
714	}	1037	}
715		1038
716	prev__stack = prev->stack;	1039	prev__cctx = prev->cctx;
717		1040
718	/* possibly "free" the stack */	1041	/* possibly "free" the cctx */
719	if (prev__stack->idle_sp == STACKLEVEL)	1042	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
720	{	1043	{
721	stack_put (prev__stack);	1044	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1045	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1046
722	prev->stack = 0;	1047	prev->cctx = 0;
		1048
		1049	cctx_put (prev__cctx);
723	}	1050	}
724		1051
		1052	++next->usecount;
		1053
725	if (!next->stack)	1054	if (!next->cctx)
726	next->stack = stack_get ();	1055	next->cctx = cctx_get (aTHX);
727		1056
728	if (prev__stack != next->stack)	1057	if (prev__cctx != next->cctx)
729	{	1058	{
730	prev__stack->top_env = PL_top_env;	1059	prev__cctx->top_env = PL_top_env;
731	PL_top_env = next->stack->top_env;	1060	PL_top_env = next->cctx->top_env;
732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1061	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
733	}	1062	}
734		1063
735	free_coro_mortal ();	1064	free_coro_mortal (aTHX);
736
737	UNLOCK;	1065	UNLOCK;
738	}	1066	}
739	}	1067	}
740		1068
741	/* use this function pointer to call the above function */
742	/* this is done to increase chances of the compiler not inlining the call */
743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
744	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
745
746	struct transfer_args	1069	struct transfer_args
747	{	1070	{
748	struct coro prev, next;	1071	struct coro prev, next;
749	int flags;
750	};	1072	};
751		1073
752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1074	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1075	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
753		1076
		1077	/ high level stuff ******************************************************/
		1078
754	static void	1079	static int
755	coro_state_destroy (struct coro *coro)	1080	coro_state_destroy (pTHX_ struct coro *coro)
756	{	1081	{
757	if (coro->refcnt--)	1082	if (coro->flags & CF_DESTROYED)
758	return;	1083	return 0;
		1084
		1085	coro->flags \|= CF_DESTROYED;
		1086
		1087	if (coro->flags & CF_READY)
		1088	{
		1089	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1090	/* alternative: look through all ready queues and remove the coro */
		1091	LOCK;
		1092	--coro_nready;
		1093	UNLOCK;
		1094	}
		1095	else
		1096	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
759		1097
760	if (coro->mainstack && coro->mainstack != main_mainstack)	1098	if (coro->mainstack && coro->mainstack != main_mainstack)
761	{	1099	{
762	struct coro temp;	1100	struct coro temp;
763		1101
764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1102	if (coro->flags & CF_RUNNING)
		1103	croak ("FATAL: tried to destroy currently running coroutine");
		1104
		1105	save_perl (aTHX_ &temp);
765	LOAD (aTHX_ coro);	1106	load_perl (aTHX_ coro);
766		1107
767	destroy_stacks (aTHX);	1108	coro_destroy (aTHX_ coro);
768		1109
769	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1110	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
770		1111
771	coro->mainstack = 0;	1112	coro->mainstack = 0;
772	}	1113	}
773		1114
774	stack_free (coro->stack);	1115	cctx_destroy (coro->cctx);
775	SvREFCNT_dec (coro->args);	1116	SvREFCNT_dec (coro->args);
776	Safefree (coro);	1117
		1118	if (coro->next) coro->next->prev = coro->prev;
		1119	if (coro->prev) coro->prev->next = coro->next;
		1120	if (coro == coro_first) coro_first = coro->next;
		1121
		1122	return 1;
777	}	1123	}
778		1124
779	static int	1125	static int
780	coro_state_clear (SV sv, MAGIC mg)	1126	coro_state_free (pTHX_ SV sv, MAGIC mg)
781	{	1127	{
782	struct coro coro = (struct coro )mg->mg_ptr;	1128	struct coro coro = (struct coro )mg->mg_ptr;
783	mg->mg_ptr = 0;	1129	mg->mg_ptr = 0;
784		1130
		1131	coro->hv = 0;
		1132
		1133	if (--coro->refcnt < 0)
		1134	{
785	coro_state_destroy (coro);	1135	coro_state_destroy (aTHX_ coro);
		1136	Safefree (coro);
		1137	}
786		1138
787	return 0;	1139	return 0;
788	}	1140	}
789		1141
790	static int	1142	static int
791	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1143	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
792	{	1144	{
793	struct coro coro = (struct coro )mg->mg_ptr;	1145	struct coro coro = (struct coro )mg->mg_ptr;
794		1146
795	++coro->refcnt;	1147	++coro->refcnt;
796		1148
797	return 0;	1149	return 0;
798	}	1150	}
799		1151
800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1152	static MGVTBL coro_state_vtbl = {
		1153	0, 0, 0, 0,
		1154	coro_state_free,
		1155	0,
		1156	#ifdef MGf_DUP
		1157	coro_state_dup,
		1158	#else
		1159	# define MGf_DUP 0
		1160	#endif
		1161	};
801		1162
802	static struct coro *
803	SvSTATE (SV *coro)
804	{
805	HV *stash;
806	MAGIC *mg;
807
808	if (SvROK (coro))
809	coro = SvRV (coro);
810
811	stash = SvSTASH (coro);
812	if (stash != coro_stash && stash != coro_state_stash)
813	{
814	/* very slow, but rare, check */
815	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
816	croak ("Coro::State object required");
817	}
818
819	mg = SvMAGIC (coro);
820	assert (mg->mg_type == PERL_MAGIC_ext);
821	return (struct coro *)mg->mg_ptr;
822	}
823
824	static void	1163	static void
825	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)	1164	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
826	{	1165	{
827	ta->prev = SvSTATE (prev);	1166	ta->prev = SvSTATE (prev_sv);
828	ta->next = SvSTATE (next);	1167	ta->next = SvSTATE (next_sv);
829	ta->flags = flags;	1168	TRANSFER_CHECK (*ta);
830	}	1169	}
831		1170
832	static void	1171	static void
833	api_transfer (SV prev, SV next, int flags)	1172	api_transfer (SV prev_sv, SV next_sv)
834	{	1173	{
835	dTHX;	1174	dTHX;
836	struct transfer_args ta;	1175	struct transfer_args ta;
837		1176
838	prepare_transfer (aTHX_ &ta, prev, next, flags);	1177	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
839	TRANSFER (ta);	1178	TRANSFER (ta);
840	}	1179	}
841		1180
842	/ Coro ******************************************************************/	1181	/ Coro ******************************************************************/
843		1182
844	#define PRIO_MAX 3
845	#define PRIO_HIGH 1
846	#define PRIO_NORMAL 0
847	#define PRIO_LOW -1
848	#define PRIO_IDLE -3
849	#define PRIO_MIN -4
850
851	/* for Coro.pm */
852	static GV coro_current, coro_idle;
853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
854	static int coro_nready;
855
856	static void	1183	static void
857	coro_enq (pTHX_ SV *sv)	1184	coro_enq (pTHX_ SV *coro_sv)
858	{	1185	{
859	int prio;
860
861	if (SvTYPE (sv) != SVt_PVHV)
862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
863
864	prio = SvSTATE (sv)->prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);	1186	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;
868	}	1187	}
869		1188
870	static SV *	1189	static SV *
871	coro_deq (pTHX_ int min_prio)	1190	coro_deq (pTHX_ int min_prio)
872	{	1191	{
…		…
876	if (min_prio < 0)	1195	if (min_prio < 0)
877	min_prio = 0;	1196	min_prio = 0;
878		1197
879	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1198	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
880	if (AvFILLp (coro_ready [prio]) >= 0)	1199	if (AvFILLp (coro_ready [prio]) >= 0)
881	{
882	coro_nready--;
883	return av_shift (coro_ready [prio]);	1200	return av_shift (coro_ready [prio]);
884	}
885		1201
886	return 0;	1202	return 0;
887	}	1203	}
888		1204
889	static void	1205	static int
890	api_ready (SV *coro)	1206	api_ready (SV *coro_sv)
891	{	1207	{
892	dTHX;	1208	dTHX;
		1209	struct coro *coro;
893		1210
894	if (SvROK (coro))	1211	if (SvROK (coro_sv))
895	coro = SvRV (coro);	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;
896		1220
897	LOCK;	1221	LOCK;
898	coro_enq (aTHX_ SvREFCNT_inc (coro));	1222	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1223	++coro_nready;
899	UNLOCK;	1224	UNLOCK;
900	}
901		1225
		1226	return 1;
		1227	}
		1228
902	static void	1229	static int
		1230	api_is_ready (SV *coro_sv)
		1231	{
		1232	dTHX;
		1233	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1234	}
		1235
		1236	static void
903	prepare_schedule (aTHX_ struct transfer_args *ta)	1237	prepare_schedule (pTHX_ struct transfer_args *ta)
904	{	1238	{
905	SV current, prev, *next;	1239	SV prev_sv, next_sv;
		1240
		1241	for (;;)
		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);
906		1287
907	LOCK;	1288	LOCK;
908
909	current = GvSV (coro_current);
910
911	for (;;)
912	{
913	LOCK;
914
915	next = coro_deq (aTHX_ PRIO_MIN);
916
917	if (next)
918	break;
919
920	UNLOCK;
921
922	{
923	dSP;
924
925	ENTER;
926	SAVETMPS;
927
928	PUSHMARK (SP);
929	PUTBACK;
930	call_sv (GvSV (coro_idle), G_DISCARD);
931
932	FREETMPS;
933	LEAVE;
934	}
935	}
936
937	prev = SvRV (current);
938	SvRV (current) = next;
939
940	/* free this only after the transfer */
941	free_coro_mortal ();	1289	free_coro_mortal (aTHX);
942	coro_mortal = prev;	1290	coro_mortal = prev_sv;
943
944	ta->prev = SvSTATE (prev);
945	ta->next = SvSTATE (next);
946	ta->flags = TRANSFER_SAVE_ALL;
947
948	UNLOCK;	1291	UNLOCK;
949	}	1292	}
950		1293
951	static void	1294	static void
952	prepare_cede (aTHX_ struct transfer_args *ta)	1295	prepare_cede (pTHX_ struct transfer_args *ta)
953	{	1296	{
954	LOCK;	1297	api_ready (coro_current);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957
958	prepare_schedule (ta);	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;
959	}	1313	}
960		1314
961	static void	1315	static void
962	api_schedule (void)	1316	api_schedule (void)
963	{	1317	{
964	dTHX;	1318	dTHX;
965	struct transfer_args ta;	1319	struct transfer_args ta;
966		1320
967	prepare_schedule (&ta);	1321	prepare_schedule (aTHX_ &ta);
968	TRANSFER (ta);	1322	TRANSFER (ta);
969	}	1323	}
970		1324
971	static void	1325	static int
972	api_cede (void)	1326	api_cede (void)
973	{	1327	{
974	dTHX;	1328	dTHX;
975	struct transfer_args ta;	1329	struct transfer_args ta;
976		1330
977	prepare_cede (&ta);	1331	prepare_cede (aTHX_ &ta);
		1332
		1333	if (ta.prev != ta.next)
		1334	{
978	TRANSFER (ta);	1335	TRANSFER (ta);
		1336	return 1;
		1337	}
		1338	else
		1339	return 0;
979	}	1340	}
980		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))
		1349	{
		1350	TRANSFER (ta);
		1351	return 1;
		1352	}
		1353	else
		1354	return 0;
		1355	}
		1356
		1357	static void
		1358	api_trace (SV *coro_sv, int flags)
		1359	{
		1360	dTHX;
		1361	struct coro *coro = SvSTATE (coro_sv);
		1362
		1363	if (flags & CC_TRACE)
		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;
		1378	else
		1379	coro->runops = RUNOPS_DEFAULT;
		1380	}
		1381	}
		1382
981	MODULE = Coro::State PACKAGE = Coro::State	1383	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
982		1384
983	PROTOTYPES: DISABLE	1385	PROTOTYPES: DISABLE
984		1386
985	BOOT:	1387	BOOT:
986	{	1388	{
987	#ifdef USE_ITHREADS	1389	#ifdef USE_ITHREADS
988	MUTEX_INIT (&coro_mutex);	1390	MUTEX_INIT (&coro_mutex);
989	#endif	1391	#endif
990	BOOT_PAGESIZE;	1392	BOOT_PAGESIZE;
991		1393
		1394	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1395
992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1396	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993		1397
994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1399	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1400	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1401	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
997		1402
998	main_mainstack = PL_mainstack;	1403	main_mainstack = PL_mainstack;
		1404	main_top_env = PL_top_env;
		1405
		1406	while (main_top_env->je_prev)
		1407	main_top_env = main_top_env->je_prev;
999		1408
1000	coroapi.ver = CORO_API_VERSION;	1409	coroapi.ver = CORO_API_VERSION;
1001	coroapi.transfer = api_transfer;	1410	coroapi.transfer = api_transfer;
1002
1003	Newz (0, main_stack, 1, coro_stack);
1004	main_stack->idle_sp = (void *)-1;
1005		1411
1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1412	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1007	}	1413	}
1008		1414
1009	SV *	1415	SV *
…		…
1013	struct coro *coro;	1419	struct coro *coro;
1014	HV *hv;	1420	HV *hv;
1015	int i;	1421	int i;
1016		1422
1017	Newz (0, coro, 1, struct coro);	1423	Newz (0, coro, 1, struct coro);
1018	coro->args = newAV ();	1424	coro->args = newAV ();
		1425	coro->flags = CF_NEW;
1019		1426
		1427	if (coro_first) coro_first->prev = coro;
		1428	coro->next = coro_first;
		1429	coro_first = coro;
		1430
1020	hv = newHV ();	1431	coro->hv = hv = newHV ();
1021	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1432	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1433	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1023		1434
1024	for (i = 1; i < items; i++)	1435	for (i = 1; i < items; i++)
1025	av_push (coro->args, newSVsv (ST (i)));	1436	av_push (coro->args, newSVsv (ST (i)));
1026
1027	coro->stack = main_stack;
1028	/coro->mainstack = 0; //actual work is done inside transfer /
1029	/coro->stack = 0;/
1030	}	1437	}
1031	OUTPUT:	1438	OUTPUT:
1032	RETVAL	1439	RETVAL
1033		1440
		1441	# these not obviously related functions are all rolled into the same xs
		1442	# function to increase chances that they all will call transfer with the same
		1443	# stack offset
1034	void	1444	void
1035	transfer (...)	1445	_set_stacklevel (...)
1036	ALIAS:	1446	ALIAS:
1037	Coro::schedule = 1	1447	Coro::State::transfer = 1
1038	Coro::cede = 2	1448	Coro::schedule = 2
1039	_set_stacklevel = 3	1449	Coro::cede = 3
		1450	Coro::cede_notself = 4
1040	CODE:	1451	CODE:
1041	{	1452	{
1042	struct transfer_args ta;	1453	struct transfer_args ta;
1043		1454
1044	switch (ix)	1455	switch (ix)
1045	{	1456	{
1046	case 0:	1457	case 0:
1047	if (items != 3)	1458	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1459	ta.next = 0;
1049
1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051	break;	1460	break;
1052		1461
1053	case 1:	1462	case 1:
1054	prepare_schedule (&ta);	1463	if (items != 2)
		1464	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1465
		1466	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1055	break;	1467	break;
1056		1468
1057	case 2:	1469	case 2:
1058	prepare_cede (&ta);	1470	prepare_schedule (aTHX_ &ta);
1059	break;	1471	break;
1060		1472
1061	case 3:	1473	case 3:
1062	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1474	prepare_cede (aTHX_ &ta);
1063	ta.next = 0;	1475	break;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;	1476
		1477	case 4:
		1478	if (!prepare_cede_notself (aTHX_ &ta))
		1479	XSRETURN_EMPTY;
		1480
1065	break;	1481	break;
1066	}	1482	}
1067		1483
		1484	BARRIER;
1068	TRANSFER (ta);	1485	TRANSFER (ta);
1069	}
1070		1486
1071	void	1487	if (GIMME_V != G_VOID && ta.next != ta.prev)
1072	_clone_state_from (SV dst, SV src)	1488	XSRETURN_YES;
		1489	}
		1490
		1491	bool
		1492	_destroy (SV *coro_sv)
1073	CODE:	1493	CODE:
1074	{	1494	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1075	struct coro *coro_src = SvSTATE (src);	1495	OUTPUT:
1076		1496	RETVAL
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1081	}
1082
1083	void
1084	_nonlocal_goto (IV nextop)
1085	CODE:
1086	/* uuh, somebody will kill me again for this */
1087	PL_op->op_next = INT2PTR (OP *, nextop);
1088		1497
1089	void	1498	void
1090	_exit (code)	1499	_exit (code)
1091	int code	1500	int code
1092	PROTOTYPE: $	1501	PROTOTYPE: $
1093	CODE:	1502	CODE:
1094	_exit (code);	1503	_exit (code);
1095		1504
1096	MODULE = Coro::State PACKAGE = Coro::Cont	1505	int
		1506	cctx_stacksize (int new_stacksize = 0)
		1507	CODE:
		1508	RETVAL = coro_stacksize;
		1509	if (new_stacksize)
		1510	coro_stacksize = new_stacksize;
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
		1515	cctx_count ()
		1516	CODE:
		1517	RETVAL = cctx_count;
		1518	OUTPUT:
		1519	RETVAL
		1520
		1521	int
		1522	cctx_idle ()
		1523	CODE:
		1524	RETVAL = cctx_idle;
		1525	OUTPUT:
		1526	RETVAL
1097		1527
1098	void	1528	void
1099	yield (...)	1529	list ()
1100	PROTOTYPE: @	1530	PPCODE:
		1531	{
		1532	struct coro *coro;
		1533	for (coro = coro_first; coro; coro = coro->next)
		1534	if (coro->hv)
		1535	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1536	}
		1537
		1538	void
		1539	call (Coro::State coro, SV *coderef)
		1540	ALIAS:
		1541	eval = 1
		1542	CODE:
		1543	{
		1544	if (coro->mainstack)
		1545	{
		1546	struct coro temp;
		1547	Zero (&temp, 1, struct coro);
		1548
		1549	if (!(coro->flags & CF_RUNNING))
		1550	{
		1551	save_perl (aTHX_ &temp);
		1552	load_perl (aTHX_ coro);
		1553	}
		1554
		1555	{
		1556	dSP;
		1557	ENTER;
		1558	SAVETMPS;
		1559	PUSHMARK (SP);
		1560	PUTBACK;
		1561	if (ix)
		1562	eval_sv (coderef, 0);
		1563	else
		1564	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1565	SPAGAIN;
		1566	FREETMPS;
		1567	LEAVE;
		1568	PUTBACK;
		1569	}
		1570
		1571	if (!(coro->flags & CF_RUNNING))
		1572	{
		1573	save_perl (aTHX_ coro);
		1574	load_perl (aTHX_ &temp);
		1575	}
		1576	}
		1577	}
		1578
		1579	SV *
		1580	is_ready (Coro::State coro)
		1581	PROTOTYPE: $
		1582	ALIAS:
		1583	is_ready = CF_READY
		1584	is_running = CF_RUNNING
		1585	is_new = CF_NEW
		1586	is_destroyed = CF_DESTROYED
		1587	CODE:
		1588	RETVAL = boolSV (coro->flags & ix);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1594
		1595	SV *
		1596	has_stack (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = boolSV (!!coro->cctx);
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	int
		1604	is_traced (Coro::State coro)
		1605	PROTOTYPE: $
		1606	CODE:
		1607	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1608	OUTPUT:
		1609	RETVAL
		1610
		1611	IV
		1612	rss (Coro::State coro)
		1613	PROTOTYPE: $
		1614	ALIAS:
		1615	usecount = 1
1101	CODE:	1616	CODE:
1102	{	1617	switch (ix)
1103	SV *yieldstack;	1618	{
1104	SV *sv;	1619	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1105	AV *defav = GvAV (PL_defgv);	1620	case 1: RETVAL = coro->usecount; break;
1106	struct coro prev, next;
1107
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0	1621	}
1112	);	1622	OUTPUT:
		1623	RETVAL
1113		1624
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1122	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1123	SvREFCNT_dec (sv);
1124
1125	coro_state_transfer (aTHX_ prev, next, 0);
1126	}
1127		1625
1128	MODULE = Coro::State PACKAGE = Coro	1626	MODULE = Coro::State PACKAGE = Coro
1129		1627
1130	BOOT:	1628	BOOT:
1131	{	1629	{
1132	int i;	1630	int i;
		1631
		1632	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1633	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1634	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1635
		1636	coro_current = get_sv ("Coro::current", FALSE);
		1637	SvREADONLY_on (coro_current);
1133		1638
1134	coro_stash = gv_stashpv ("Coro", TRUE);	1639	coro_stash = gv_stashpv ("Coro", TRUE);
1135		1640
1136	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1641	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1137	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1642	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1643	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1644	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1645	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1646	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1142		1647
1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1145
1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1648	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147	coro_ready[i] = newAV ();	1649	coro_ready[i] = newAV ();
1148		1650
1149	{	1651	{
1150	SV *sv = perl_get_sv("Coro::API", 1);	1652	SV *sv = perl_get_sv("Coro::API", 1);
1151		1653
1152	coroapi.schedule = api_schedule;	1654	coroapi.schedule = api_schedule;
1153	coroapi.cede = api_cede;	1655	coroapi.cede = api_cede;
		1656	coroapi.cede_notself = api_cede_notself;
1154	coroapi.ready = api_ready;	1657	coroapi.ready = api_ready;
		1658	coroapi.is_ready = api_is_ready;
1155	coroapi.nready = &coro_nready;	1659	coroapi.nready = &coro_nready;
1156	coroapi.current = coro_current;	1660	coroapi.current = coro_current;
1157		1661
1158	GCoroAPI = &coroapi;	1662	GCoroAPI = &coroapi;
1159	sv_setiv (sv, (IV)&coroapi);	1663	sv_setiv (sv, (IV)&coroapi);
1160	SvREADONLY_on (sv);	1664	SvREADONLY_on (sv);
1161	}	1665	}
1162	}	1666	}
		1667
		1668	void
		1669	_set_current (SV *current)
		1670	PROTOTYPE: $
		1671	CODE:
		1672	SvREFCNT_dec (SvRV (coro_current));
		1673	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1163		1674
1164	int	1675	int
1165	prio (Coro::State coro, int newprio = 0)	1676	prio (Coro::State coro, int newprio = 0)
1166	ALIAS:	1677	ALIAS:
1167	nice = 1	1678	nice = 1
…		…
1170	RETVAL = coro->prio;	1681	RETVAL = coro->prio;
1171		1682
1172	if (items > 1)	1683	if (items > 1)
1173	{	1684	{
1174	if (ix)	1685	if (ix)
1175	newprio += coro->prio;	1686	newprio = coro->prio - newprio;
1176		1687
1177	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1688	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1178	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1689	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1179		1690
1180	coro->prio = newprio;	1691	coro->prio = newprio;
1181	}	1692	}
1182	}	1693	}
		1694	OUTPUT:
		1695	RETVAL
1183		1696
1184	void	1697	SV *
1185	ready (SV *self)	1698	ready (SV *self)
1186	PROTOTYPE: $	1699	PROTOTYPE: $
1187	CODE:	1700	CODE:
1188	api_ready (self);	1701	RETVAL = boolSV (api_ready (self));
		1702	OUTPUT:
		1703	RETVAL
1189		1704
1190	int	1705	int
1191	nready (...)	1706	nready (...)
1192	PROTOTYPE:	1707	PROTOTYPE:
1193	CODE:	1708	CODE:
1194	RETVAL = coro_nready;	1709	RETVAL = coro_nready;
1195	OUTPUT:	1710	OUTPUT:
1196	RETVAL	1711	RETVAL
1197		1712
		1713	# for async_pool speedup
		1714	void
		1715	_pool_1 (SV *cb)
		1716	CODE:
		1717	{
		1718	struct coro *coro = SvSTATE (coro_current);
		1719	HV hv = (HV )SvRV (coro_current);
		1720	AV *defav = GvAV (PL_defgv);
		1721	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1722	AV *invoke_av;
		1723	int i, len;
		1724
		1725	if (!invoke)
		1726	croak ("\3terminate\2\n");
		1727
		1728	SvREFCNT_dec (coro->asp_deffh);
		1729	coro->asp_deffh = SvREFCNT_inc (PL_defoutgv);
		1730
		1731	hv_store (hv, "desc", sizeof ("desc") - 1,
		1732	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1733
		1734	invoke_av = (AV *)SvRV (invoke);
		1735	len = av_len (invoke_av);
		1736
		1737	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1738
		1739	if (len > 0)
		1740	{
		1741	av_fill (defav, len - 1);
		1742	for (i = 0; i < len; ++i)
		1743	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1744	}
		1745
		1746	SvREFCNT_dec (invoke);
		1747	}
		1748
		1749	void
		1750	_pool_2 (SV *cb)
		1751	CODE:
		1752	{
		1753	struct coro *coro = SvSTATE (coro_current);
		1754
		1755	sv_setsv (cb, &PL_sv_undef);
		1756
		1757	SvREFCNT_dec (PL_defoutgv); PL_defoutgv = coro->asp_deffh;
		1758	coro->asp_deffh = 0;
		1759
		1760	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1761	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1762	croak ("\3terminate\2\n");
		1763
		1764	av_clear (GvAV (PL_defgv));
		1765	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1767
		1768	coro->prio = 0;
		1769
		1770	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1771	api_trace (coro_current, 0);
		1772
		1773	av_push (av_async_pool, newSVsv (coro_current));
		1774	}
		1775
		1776
1198	MODULE = Coro::State PACKAGE = Coro::AIO	1777	MODULE = Coro::State PACKAGE = Coro::AIO
1199		1778
1200	SV *	1779	SV *
1201	_get_state ()	1780	_get_state ()
1202	CODE:	1781	CODE:
1203	{	1782	{
1204	struct {	1783	struct io_state *data;
1205	int errorno;
1206	int laststype;
1207	int laststatval;
1208	Stat_t statcache;
1209	} data;
1210		1784
		1785	RETVAL = newSV (sizeof (struct io_state));
		1786	data = (struct io_state *)SvPVX (RETVAL);
		1787	SvCUR_set (RETVAL, sizeof (struct io_state));
		1788	SvPOK_only (RETVAL);
		1789
1211	data.errorno = errno;	1790	data->errorno = errno;
1212	data.laststype = PL_laststype;	1791	data->laststype = PL_laststype;
1213	data.laststatval = PL_laststatval;	1792	data->laststatval = PL_laststatval;
1214	data.statcache = PL_statcache;	1793	data->statcache = PL_statcache;
1215
1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
1217	}	1794	}
1218	OUTPUT:	1795	OUTPUT:
1219	RETVAL	1796	RETVAL
1220		1797
1221	void	1798	void
1222	_set_state (char *data_)	1799	_set_state (char *data_)
1223	PROTOTYPE: $	1800	PROTOTYPE: $
1224	CODE:	1801	CODE:
1225	{	1802	{
1226	struct {	1803	struct io_state data = (void )data_;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} data = (void )data_;
1232		1804
1233	errno = data->errorno;	1805	errno = data->errorno;
1234	PL_laststype = data->laststype;	1806	PL_laststype = data->laststype;
1235	PL_laststatval = data->laststatval;	1807	PL_laststatval = data->laststatval;
1236	PL_statcache = data->statcache;	1808	PL_statcache = data->statcache;
1237	}	1809	}
		1810

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Comparing Coro/Coro/State.xs (file contents): Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs. Revision 1.182 by root, Wed Oct 3 18:37:48 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.182 by root, Wed Oct 3 18:37:48 2007 UTC