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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.181 by root, Wed Oct 3 17:37:33 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? */
63	#define UCORO_STATE "_coro_state"	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
64		92
65	/* 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
66	* to the current C stack pointer. Its property is that it changes with each call	94	* portable way as possible. */
67	* and should be unique. */	95	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
69		97
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		99
72	#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))
73		109
74	#include "CoroAPI.h"	110	#include "CoroAPI.h"
75		111
76	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
80	#else	116	#else
81	# define LOCK (void)0	117	# define LOCK (void)0
82	# define UNLOCK (void)0	118	# define UNLOCK (void)0
83	#endif	119	#endif
84		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;
85	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
86	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;
87	static HV *coro_state_stash;	134	static HV coro_state_stash, coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV coro_mortal; / will be freed after next transfer */	135	static SV coro_mortal; / will be freed after next transfer */
91		136
92	/* this is actually not only the c stack but also c registers etc... */	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
		156	/* this is a structure representing a c-level coroutine */
93	typedef struct {	157	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		159
		160	/* the stack */
		161	void *sptr;
		162	size_t ssize;
		163
		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;
98	coro_context cctx;	168	coro_context cctx;
99		169
100	void *sptr;	170	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
102	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
103		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	};
		182
		183	/* this is a structure representing a perl-level coroutine */
104	struct coro {	184	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	185	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	186	coro_cctx *cctx;
107
108	/* the optional C context */
109	coro_stack *stack;
110	void *cursp;
111	int gencnt;
112
113	/* optionally saved, might be zero */
114	AV *defav;
115	SV *defsv;
116	SV *errsv;
117
118	/* saved global state not related to stacks */
119	U8 dowarn;
120	I32 in_eval;
121
122	/* the stacks and related info (callchain etc..) */
123	PERL_SI *curstackinfo;
124	AV *curstack;
125	AV *mainstack;
126	SV **stack_sp;
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152		187
153	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
154	AV *args;	189	AV *args;
		190	int refcnt;
		191	int flags; /* CF_ flags */
		192
		193	/* optionally saved, might be zero */
		194	AV defav; / @_ */
		195	SV defsv; / $_ */
		196	SV errsv; / $@ */
		197	GV deffh; / default filehandle */
		198	SV irssv; / $/ */
		199	SV irssv_sv; / real $/ cache */
		200
		201	#define VAR(name,type) type name;
		202	# include "state.h"
		203	#undef VAR
		204
		205	/* statistics */
		206	int usecount; /* number of transfers to this coro */
		207
		208	/* coro process data */
		209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	GV *defoutgv;
		214
		215	/* linked list */
		216	struct coro next, prev;
		217	HV hv; / the perl hash associated with this coro, if any */
155	};	218	};
156		219
157	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
159		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
160	static AV *	240	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	241	coro_clone_padlist (pTHX_ CV *cv)
162	{	242	{
163	AV *padlist = CvPADLIST (cv);	243	AV *padlist = CvPADLIST (cv);
164	AV newpadlist, newpad;	244	AV newpadlist, newpad;
165		245
166	newpadlist = newAV ();	246	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
168	#if PERL_VERSION < 9	248	#if PERL_VERSION_ATLEAST (5,9,0)
		249	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		250	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	251	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172	#endif	252	#endif
173	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	253	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174	--AvFILLp (padlist);	254	--AvFILLp (padlist);
175		255
176	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	256	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
220		300
221	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
222		302
223	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224		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
225	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
226	static void	339	static void
227	get_padlist (pTHX_ CV *cv)	340	get_padlist (pTHX_ CV *cv)
228	{	341	{
229	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
230		344
231	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
232	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233	else	347	else
234	{	348	{
235	#if 0	349	#if CORO_PREFER_PERL_FUNCTIONS
236	/* this should work - but it doesn't :( */	350	/* this is probably cleaner, but also slower? */
237	CV *cp = Perl_cv_clone (aTHX_ cv);	351	CV *cp = Perl_cv_clone (cv);
238	CvPADLIST (cv) = CvPADLIST (cp);	352	CvPADLIST (cv) = CvPADLIST (cp);
239	CvPADLIST (cp) = 0;	353	CvPADLIST (cp) = 0;
240	SvREFCNT_dec (cp);	354	SvREFCNT_dec (cp);
241	#else	355	#else
242	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
245	}	359	}
246		360
247	static void	361	static void
248	put_padlist (pTHX_ CV *cv)	362	put_padlist (pTHX_ CV *cv)
249	{	363	{
250	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
251		366
252	if (!mg)	367	if (!mg)
253	{	368	{
254	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
257	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
258	}	373	}
259		374
260	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
261	}
262		376
263	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
264	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
265		379
266	#define LOAD(state) load_state(aTHX_ (state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
267	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	381	}
268		382
269	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/ load & save, init *****************************************************/
270		384
271	static void	385	static void
272	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
273	{	387	{
274	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
275	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
276		391
277	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
278	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
279	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
280	PL_stack_sp = c->stack_sp;	395	PL_defoutgv = c->deffh;
281	PL_op = c->op;	396	PL_rs = c->irssv;
282	PL_curpad = c->curpad;	397	GvSV (irsgv) = c->irssv_sv;
283	PL_comppad = c->comppad;
284	PL_compcv = c->compcv;
285	PL_stack_base = c->stack_base;
286	PL_stack_max = c->stack_max;
287	PL_tmps_stack = c->tmps_stack;
288	PL_tmps_floor = c->tmps_floor;
289	PL_tmps_ix = c->tmps_ix;
290	PL_tmps_max = c->tmps_max;
291	PL_markstack = c->markstack;
292	PL_markstack_ptr = c->markstack_ptr;
293	PL_markstack_max = c->markstack_max;
294	PL_scopestack = c->scopestack;
295	PL_scopestack_ix = c->scopestack_ix;
296	PL_scopestack_max = c->scopestack_max;
297	PL_savestack = c->savestack;
298	PL_savestack_ix = c->savestack_ix;
299	PL_savestack_max = c->savestack_max;
300	#if PERL_VERSION < 9
301	PL_retstack = c->retstack;
302	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;
304	#endif
305	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
312		398
313	{	399	{
314	dSP;	400	dSP;
315	CV *cv;	401	CV *cv;
316		402
317	/* now do the ugly restore mess */	403	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	404	while ((cv = (CV *)POPs))
319	{	405	{
320	AV padlist = (AV )POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	406	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	407	CvDEPTH (cv) = PTR2IV (POPs);
326	}	408	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	409	}
330		410
331	PUTBACK;	411	PUTBACK;
332	}	412	}
333	}	413	}
334		414
335	static void	415	static void
336	save_state(pTHX_ Coro__State c, int flags)	416	save_perl (pTHX_ Coro__State c)
337	{	417	{
338	{	418	{
339	dSP;	419	dSP;
340	I32 cxix = cxstack_ix;	420	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	421	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	424	/*
345	* 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
346	* (and reinitialize) all cv's in the whole callchain :(	426	* (and reinitialize) all cv's in the whole callchain :(
347	*/	427	*/
348		428
349	PUSHs (Nullsv);	429	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	430	/* this loop was inspired by pp_caller */
351	for (;;)	431	for (;;)
352	{	432	{
353	while (cxix >= 0)	433	while (cxix >= 0)
354	{	434	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	435	PERL_CONTEXT *cx = &ccstk[cxix--];
356		436
357	if (CxTYPE(cx) == CXt_SUB)	437	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
358	{	438	{
359	CV *cv = cx->blk_sub.cv;	439	CV *cv = cx->blk_sub.cv;
		440
360	if (CvDEPTH(cv))	441	if (CvDEPTH (cv))
361	{	442	{
362	EXTEND (SP, CvDEPTH(cv)*2);	443	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	444	PUSHs ((SV *)CvPADLIST (cv));
		445	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	446	PUSHs ((SV *)cv);
373		447
		448	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	449	get_padlist (aTHX_ cv);
375	}	450	}
376	}	451	}
377	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)
379	{
380	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}
384	#endif
385	}	452	}
386		453
387	if (top_si->si_type == PERLSI_MAIN)	454	if (top_si->si_type == PERLSI_MAIN)
388	break;	455	break;
389		456
390	top_si = top_si->si_prev;	457	top_si = top_si->si_prev;
391	ccstk = top_si->si_cxstack;	458	ccstk = top_si->si_cxstack;
392	cxix = top_si->si_cxix;	459	cxix = top_si->si_cxix;
393	}	460	}
394		461
395	PUTBACK;	462	PUTBACK;
396	}	463	}
397		464
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	465	c->defav = GvAV (PL_defgv);
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	466	c->defsv = DEFSV;
400	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);
401		471
402	c->dowarn = PL_dowarn;	472	#define VAR(name,type)c->name = PL_ ## name;
403	c->in_eval = PL_in_eval;	473	# include "state.h"
404		474	#undef VAR
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;
409	c->op = PL_op;
410	c->curpad = PL_curpad;
411	c->comppad = PL_comppad;
412	c->compcv = PL_compcv;
413	c->stack_base = PL_stack_base;
414	c->stack_max = PL_stack_max;
415	c->tmps_stack = PL_tmps_stack;
416	c->tmps_floor = PL_tmps_floor;
417	c->tmps_ix = PL_tmps_ix;
418	c->tmps_max = PL_tmps_max;
419	c->markstack = PL_markstack;
420	c->markstack_ptr = PL_markstack_ptr;
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
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	allocate_stack (Coro__State ctx, int alloc)	558	coro_rss (pTHX_ struct coro *coro)
540	{	559	{
541	coro_stack *stack;	560	size_t rss = sizeof (coro);
542		561
543	New (0, stack, 1, coro_stack);	562	if (coro->mainstack)
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{	563	{
551	#if HAVE_MMAP	564	if (coro->flags & CF_RUNNING)
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
554	if (stack->sptr != (void *)-1)
555	{	565	{
556	# if STACKGUARD	566	#define VAR(name,type)coro->name = PL_ ## name;
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	567	# include "state.h"
558	# endif	568	#undef VAR
559	}	569	}
560	else
561	#endif
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569		570
570	ctx->stack = stack;	571	rss += sizeof (coro->curstackinfo);
571	}	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);
572		579
573	static void	580	#if !PERL_VERSION_ATLEAST (5,9,0)
574	deallocate_stack (Coro__State ctx)	581	rss += coro->retstack_max * sizeof (OP *);
575	{	582	#endif
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{	583	}
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590		584
591	Safefree (stack);	585	return rss;
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}	586	}
597		587
		588	/ coroutine stack handling **********************************************/
		589
598	static void	590	static void
599	setup_coro (void *arg)	591	coro_setup (pTHX_ struct coro *coro)
600	{	592	{
601	/*	593	/*
602	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
603	*/	595	*/
		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->defoutgv);
		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	{
		813	dSP;
		814	LOGOP myop;
		815
		816	PL_top_env = &PL_start_env;
		817
		818	if (cctx->flags & CC_TRACE)
		819	PL_runops = runops_trace;
		820
		821	Zero (&myop, 1, LOGOP);
		822	myop.op_next = PL_op;
		823	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		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;
		830	PL_op = (OP *)&myop;
		831	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		832	SPAGAIN;
		833	}
		834
		835	/*
		836	* this is a _very_ stripped down perl interpreter ;)
		837	*/
		838	static void
		839	coro_run (void *arg)
		840	{
604	dTHX;	841	dTHX;
605	dSP;
606	Coro__State ctx = (Coro__State)arg;
607	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
608		842
609	coro_init_stacks (aTHX);	843	/* coro_run is the alternative tail of transfer(), so unlock here. */
610	/PL_curcop = 0;/	844	UNLOCK;
611	/PL_in_eval = PL_in_eval;/ /* inherit */
612	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
614		845
615	SPAGAIN;	846	/* we now skip the entersub that lead to transfer() */
		847	PL_op = PL_op->op_next;
616		848
617	if (ctx->stack)	849	/* inject a fake subroutine call to cctx_init */
618	{	850	prepare_cctx (aTHX_ (coro_cctx *)arg);
619	ctx->cursp = 0;
620		851
621	PUSHMARK(SP);	852	/* somebody or something will hit me for both perl_run and PL_restartop */
622	PUTBACK;	853	PL_restartop = PL_op;
623	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);	854	perl_run (PL_curinterp);
624		855
625	if (SvTRUE (ERRSV))	856	/*
626	croak (NULL);	857	* If perl-run returns we assume exit() was being called or the coro
627	else	858	* fell off the end, which seems to be the only valid (non-bug)
628	croak ("FATAL: CCTXT coroutine returned!");	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
		862	*/
		863	PL_top_env = main_top_env;
		864	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		865	}
		866
		867	static coro_cctx *
		868	cctx_new ()
		869	{
		870	coro_cctx *cctx;
		871	void *stack_start;
		872	size_t stack_size;
		873
		874	++cctx_count;
		875
		876	Newz (0, cctx, 1, coro_cctx);
		877
		878	#if HAVE_MMAP
		879
		880	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		881	/* mmap supposedly does allocate-on-write for us */
		882	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		883
		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;
629	}	892	}
630	else	893	else
631	{	894	#endif
632	UNOP myop;
633
634	Zero(&myop, 1, UNOP);
635	myop.op_next = Nullop;
636	myop.op_flags = OPf_WANT_VOID;
637
638	PL_op = (OP *)&myop;
639
640	PUSHMARK(SP);
641	XPUSHs (sub_init);
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;
652
653	ENTER; /* necessary e.g. for dounwind */
654	}	895	{
655	}	896	cctx->ssize = coro_stacksize * (long)sizeof (long);
		897	New (0, cctx->sptr, coro_stacksize, long);
656		898
657	static void	899	if (!cctx->sptr)
658	continue_coro (void *arg)	900	{
659	{	901	perror ("FATAL: unable to allocate stack for coroutine");
660	/*	902	_exit (EXIT_FAILURE);
661	* this is a _very_ stripped down perl interpreter ;)	903	}
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665		904
666	PL_top_env = &ctx->start_env;	905	stack_start = cctx->sptr;
		906	stack_size = cctx->ssize;
		907	}
667		908
668	ctx->cursp = 0;	909	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
669	PL_op = PL_op->op_next;	910	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
670	CALLRUNOPS(aTHX);
671		911
672	abort ();	912	return cctx;
673	}	913	}
674		914
675	static void	915	static void
		916	cctx_destroy (coro_cctx *cctx)
		917	{
		918	if (!cctx)
		919	return;
		920
		921	--cctx_count;
		922
		923	#if CORO_USE_VALGRIND
		924	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		925	#endif
		926
		927	#if HAVE_MMAP
		928	if (cctx->flags & CC_MAPPED)
		929	munmap (cctx->sptr, cctx->ssize);
		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)
		941	{
		942	coro_cctx *cctx = cctx_first;
		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);
		950	}
		951
		952	return cctx_new ();
		953	}
		954
		955	static void
		956	cctx_put (coro_cctx *cctx)
		957	{
		958	/* free another cctx if overlimit */
		959	if (cctx_idle >= MAX_IDLE_CCTX)
		960	{
		961	coro_cctx *first = cctx_first;
		962	cctx_first = first->next;
		963	--cctx_idle;
		964
		965	cctx_destroy (first);
		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
676	transfer (pTHX_ struct coro prev, struct coro next, int flags)	996	transfer (pTHX_ struct coro prev, struct coro next)
677	{	997	{
678	dSTACKLEVEL;	998	dSTACKLEVEL;
679		999
		1000	/* sometimes transfer is only called to set idle_sp */
		1001	if (!next)
		1002	{
		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	}
680	if (prev != next)	1006	else if (prev != next)
681	{	1007	{
682	if (next->mainstack)	1008	coro_cctx *prev__cctx;
		1009
		1010	if (prev->flags & CF_NEW)
683	{	1011	{
684	LOCK;	1012	/* create a new empty context */
685	SAVE (prev, flags);	1013	Newz (0, prev->cctx, 1, coro_cctx);
686	LOAD (next);	1014	prev->flags &= ~CF_NEW;
687	UNLOCK;	1015	prev->flags \|= CF_RUNNING;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}	1016	}
722	else if (next->tmps_ix == -2)	1017
723	croak ("tried to transfer to running coroutine");	1018	prev->flags &= ~CF_RUNNING;
		1019	next->flags \|= CF_RUNNING;
		1020
		1021	LOCK;
		1022
		1023	if (next->flags & CF_NEW)
		1024	{
		1025	/* need to start coroutine */
		1026	next->flags &= ~CF_NEW;
		1027	/* first get rid of the old state */
		1028	save_perl (aTHX_ prev);
		1029	/* setup coroutine call */
		1030	coro_setup (aTHX_ next);
		1031	}
724	else	1032	else
725	{	1033	{
726	LOCK;	1034	/* coroutine already started */
727	SAVE (prev, -1); /* first get rid of the old state */	1035	save_perl (aTHX_ prev);
728	UNLOCK;	1036	load_perl (aTHX_ next);
729
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
738
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}	1037	}
765	}
766		1038
767	LOCK;	1039	prev__cctx = prev->cctx;
768	if (coro_mortal)	1040
769	{	1041	/* possibly "free" the cctx */
770	SvREFCNT_dec (coro_mortal);	1042	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
771	coro_mortal = 0;	1043	{
772	}	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
		1047	prev->cctx = 0;
		1048
		1049	cctx_put (prev__cctx);
		1050	}
		1051
		1052	++next->usecount;
		1053
		1054	if (!next->cctx)
		1055	next->cctx = cctx_get (aTHX);
		1056
		1057	if (prev__cctx != next->cctx)
		1058	{
		1059	prev__cctx->top_env = PL_top_env;
		1060	PL_top_env = next->cctx->top_env;
		1061	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1062	}
		1063
		1064	free_coro_mortal (aTHX);
773	UNLOCK;	1065	UNLOCK;
		1066	}
774	}	1067	}
775		1068
776	#define SV_CORO(sv,func) \	1069	struct transfer_args
777	do { \	1070	{
778	if (SvROK (sv)) \	1071	struct coro prev, next;
779	sv = SvRV (sv); \	1072	};
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		1073
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1074	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1075	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
798		1076
		1077	/ high level stuff ******************************************************/
		1078
799	static void	1079	static int
		1080	coro_state_destroy (pTHX_ struct coro *coro)
		1081	{
		1082	if (coro->flags & CF_DESTROYED)
		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 */
		1097
		1098	if (coro->mainstack && coro->mainstack != main_mainstack)
		1099	{
		1100	struct coro temp;
		1101
		1102	if (coro->flags & CF_RUNNING)
		1103	croak ("FATAL: tried to destroy currently running coroutine");
		1104
		1105	save_perl (aTHX_ &temp);
		1106	load_perl (aTHX_ coro);
		1107
		1108	coro_destroy (aTHX_ coro);
		1109
		1110	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1111
		1112	coro->mainstack = 0;
		1113	}
		1114
		1115	cctx_destroy (coro->cctx);
		1116	SvREFCNT_dec (coro->args);
		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;
		1123	}
		1124
		1125	static int
		1126	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1127	{
		1128	struct coro coro = (struct coro )mg->mg_ptr;
		1129	mg->mg_ptr = 0;
		1130
		1131	coro->hv = 0;
		1132
		1133	if (--coro->refcnt < 0)
		1134	{
		1135	coro_state_destroy (aTHX_ coro);
		1136	Safefree (coro);
		1137	}
		1138
		1139	return 0;
		1140	}
		1141
		1142	static int
		1143	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1144	{
		1145	struct coro coro = (struct coro )mg->mg_ptr;
		1146
		1147	++coro->refcnt;
		1148
		1149	return 0;
		1150	}
		1151
		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	};
		1162
		1163	static void
		1164	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1165	{
		1166	ta->prev = SvSTATE (prev_sv);
		1167	ta->next = SvSTATE (next_sv);
		1168	TRANSFER_CHECK (*ta);
		1169	}
		1170
		1171	static void
800	api_transfer(pTHX_ SV prev, SV next, int flags)	1172	api_transfer (SV prev_sv, SV next_sv)
801	{	1173	{
802	SV_CORO (prev, "Coro::transfer");	1174	dTHX;
803	SV_CORO (next, "Coro::transfer");	1175	struct transfer_args ta;
804		1176
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1177	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1178	TRANSFER (ta);
806	}	1179	}
807		1180
808	/ Coro ******************************************************************/	1181	/ Coro ******************************************************************/
809		1182
810	#define PRIO_MAX 3
811	#define PRIO_HIGH 1
812	#define PRIO_NORMAL 0
813	#define PRIO_LOW -1
814	#define PRIO_IDLE -3
815	#define PRIO_MIN -4
816
817	/* for Coro.pm */
818	static GV coro_current, coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;
821
822	static void	1183	static void
823	coro_enq (pTHX_ SV *sv)	1184	coro_enq (pTHX_ SV *coro_sv)
824	{	1185	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	1186	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1187	}
841		1188
842	static SV *	1189	static SV *
843	coro_deq (pTHX_ int min_prio)	1190	coro_deq (pTHX_ int min_prio)
844	{	1191	{
…		…
847	min_prio -= PRIO_MIN;	1194	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1195	if (min_prio < 0)
849	min_prio = 0;	1196	min_prio = 0;
850		1197
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1198	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	1199	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1200	return av_shift (coro_ready [prio]);
856	}
857		1201
858	return 0;	1202	return 0;
859	}	1203	}
860		1204
861	static void	1205	static int
862	api_ready (SV *coro)	1206	api_ready (SV *coro_sv)
863	{	1207	{
864	dTHX;	1208	dTHX;
		1209	struct coro *coro;
865		1210
866	if (SvROK (coro))	1211	if (SvROK (coro_sv))
867	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;
868		1220
869	LOCK;	1221	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1222	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1223	++coro_nready;
871	UNLOCK;	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
		1236	static void
		1237	prepare_schedule (pTHX_ struct transfer_args *ta)
		1238	{
		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);
		1287
		1288	LOCK;
		1289	free_coro_mortal (aTHX);
		1290	coro_mortal = prev_sv;
		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;
872	}	1313	}
873		1314
874	static void	1315	static void
875	api_schedule (void)	1316	api_schedule (void)
876	{	1317	{
877	dTHX;	1318	dTHX;
		1319	struct transfer_args ta;
878		1320
879	SV prev, next;	1321	prepare_schedule (aTHX_ &ta);
880		1322	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
901	}	1323	}
902		1324
903	static void	1325	static int
904	api_cede (void)	1326	api_cede (void)
905	{	1327	{
906	dTHX;	1328	dTHX;
		1329	struct transfer_args ta;
907		1330
908	LOCK;	1331	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1332
912	api_schedule ();	1333	if (ta.prev != ta.next)
		1334	{
		1335	TRANSFER (ta);
		1336	return 1;
		1337	}
		1338	else
		1339	return 0;
913	}	1340	}
914		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
915	MODULE = Coro::State PACKAGE = Coro::State	1383	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1384
917	PROTOTYPES: ENABLE	1385	PROTOTYPES: DISABLE
918		1386
919	BOOT:	1387	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1388	{
921	#ifdef USE_ITHREADS	1389	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1390	MUTEX_INIT (&coro_mutex);
923	#endif	1391	#endif
924	BOOT_PAGESIZE;	1392	BOOT_PAGESIZE;
925		1393
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1394	irsgv = gv_fetchpv ("/", 1, SVt_PV);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1395
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1396	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1397
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1399	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1400	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1401	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934		1402
935	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;
936		1408
937	coroapi.ver = CORO_API_VERSION;	1409	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1410	coroapi.transfer = api_transfer;
939	}
940		1411
941	Coro::State	1412	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1413	}
943	SV * args	1414
944	PROTOTYPE: $	1415	SV *
		1416	new (char *klass, ...)
945	CODE:	1417	CODE:
946	Coro__State coro;	1418	{
		1419	struct coro *coro;
		1420	HV *hv;
		1421	int i;
947		1422
948	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1423	Newz (0, coro, 1, struct coro);
		1424	coro->args = newAV ();
		1425	coro->flags = CF_NEW;
952		1426
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1427	if (coro_first) coro_first->prev = coro;
954	/coro->mainstack = 0; //actual work is done inside transfer /	1428	coro->next = coro_first;
955	/coro->stack = 0;/	1429	coro_first = coro;
956		1430
957	/* same as JMPENV_BOOTSTRAP */	1431	coro->hv = hv = newHV ();
958	/* we might be able to recycle start_env, but safe is safe */	1432	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
959	/Zero (&coro->start_env, 1, JMPENV);/	1433	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962		1434
963	RETVAL = coro;	1435	for (i = 1; i < items; i++)
		1436	av_push (coro->args, newSVsv (ST (i)));
		1437	}
964	OUTPUT:	1438	OUTPUT:
965	RETVAL	1439	RETVAL
966		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
967	void	1444	void
968	transfer(prev, next, flags)	1445	_set_stacklevel (...)
969	SV *prev	1446	ALIAS:
970	SV *next	1447	Coro::State::transfer = 1
971	int flags	1448	Coro::schedule = 2
972	PROTOTYPE: @	1449	Coro::cede = 3
		1450	Coro::cede_notself = 4
973	CODE:	1451	CODE:
974	PUTBACK;	1452	{
975	SV_CORO (next, "Coro::transfer");	1453	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1454
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1455	switch (ix)
978	SPAGAIN;	1456	{
		1457	case 0:
		1458	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1459	ta.next = 0;
		1460	break;
		1461
		1462	case 1:
		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));
		1467	break;
		1468
		1469	case 2:
		1470	prepare_schedule (aTHX_ &ta);
		1471	break;
		1472
		1473	case 3:
		1474	prepare_cede (aTHX_ &ta);
		1475	break;
		1476
		1477	case 4:
		1478	if (!prepare_cede_notself (aTHX_ &ta))
		1479	XSRETURN_EMPTY;
		1480
		1481	break;
		1482	}
		1483
		1484	BARRIER;
		1485	TRANSFER (ta);
		1486
		1487	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1488	XSRETURN_YES;
		1489	}
		1490
		1491	bool
		1492	_destroy (SV *coro_sv)
		1493	CODE:
		1494	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1495	OUTPUT:
		1496	RETVAL
979		1497
980	void	1498	void
981	DESTROY(coro)
982	Coro::State coro
983	CODE:
984
985	if (coro->mainstack && coro->mainstack != main_mainstack)
986	{
987	struct coro temp;
988
989	PUTBACK;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
991	LOAD (aTHX_ coro);
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005
1006	void
1007	_exit(code)	1499	_exit (code)
1008	int code	1500	int code
1009	PROTOTYPE: $	1501	PROTOTYPE: $
1010	CODE:	1502	CODE:
1011	_exit (code);	1503	_exit (code);
1012		1504
1013	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
1014		1513
1015	# this is slightly dirty (should expose a c-level api)	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
1016		1527
1017	void	1528	void
1018	yield(...)	1529	list ()
1019	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
1020	CODE:	1616	CODE:
1021	SV *yieldstack;	1617	switch (ix)
1022	SV *sv;	1618	{
1023	AV *defav = GvAV (PL_defgv);	1619	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1024	struct coro prev, next;	1620	case 1: RETVAL = coro->usecount; break;
1025
1026	yieldstack = *hv_fetch (
1027	(HV *)SvRV (GvSV (coro_current)),
1028	"yieldstack", sizeof ("yieldstack") - 1,
1029	0	1621	}
1030	);	1622	OUTPUT:
		1623	RETVAL
1031		1624
1032	/* set up @_ -- ugly */
1033	av_clear (defav);
1034	av_fill (defav, items - 1);
1035	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));
1040	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));
1041	SvREFCNT_dec (sv);
1042
1043	transfer (aTHX_ prev, next, 0);
1044		1625
1045	MODULE = Coro::State PACKAGE = Coro	1626	MODULE = Coro::State PACKAGE = Coro
1046		1627
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1628	BOOT:
1050	{	1629	{
1051	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);
		1638
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1639	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1640
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1641	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1642	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1643	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1644	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1645	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1646	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1647
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1648	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065	coro_ready[i] = newAV ();	1649	coro_ready[i] = newAV ();
1066		1650
1067	{	1651	{
1068	SV *sv = perl_get_sv("Coro::API", 1);	1652	SV *sv = perl_get_sv("Coro::API", 1);
1069		1653
1070	coroapi.schedule = api_schedule;	1654	coroapi.schedule = api_schedule;
1071	coroapi.cede = api_cede;	1655	coroapi.cede = api_cede;
		1656	coroapi.cede_notself = api_cede_notself;
1072	coroapi.ready = api_ready;	1657	coroapi.ready = api_ready;
		1658	coroapi.is_ready = api_is_ready;
1073	coroapi.nready = &coro_nready;	1659	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1660	coroapi.current = coro_current;
1075		1661
1076	GCoroAPI = &coroapi;	1662	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1663	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1664	SvREADONLY_on (sv);
1079	}	1665	}
1080	}	1666	}
1081		1667
1082	#if !PERL_MICRO
1083
1084	void	1668	void
1085	ready(self)	1669	_set_current (SV *current)
1086	SV * self
1087	PROTOTYPE: $	1670	PROTOTYPE: $
1088	CODE:	1671	CODE:
1089	api_ready (self);	1672	SvREFCNT_dec (SvRV (coro_current));
1090		1673	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1091	#endif
1092		1674
1093	int	1675	int
		1676	prio (Coro::State coro, int newprio = 0)
		1677	ALIAS:
		1678	nice = 1
		1679	CODE:
		1680	{
		1681	RETVAL = coro->prio;
		1682
		1683	if (items > 1)
		1684	{
		1685	if (ix)
		1686	newprio = coro->prio - newprio;
		1687
		1688	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1689	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1690
		1691	coro->prio = newprio;
		1692	}
		1693	}
		1694	OUTPUT:
		1695	RETVAL
		1696
		1697	SV *
		1698	ready (SV *self)
		1699	PROTOTYPE: $
		1700	CODE:
		1701	RETVAL = boolSV (api_ready (self));
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	int
1094	nready(...)	1706	nready (...)
1095	PROTOTYPE:	1707	PROTOTYPE:
1096	CODE:	1708	CODE:
1097	RETVAL = coro_nready;	1709	RETVAL = coro_nready;
1098	OUTPUT:	1710	OUTPUT:
1099	RETVAL	1711	RETVAL
1100		1712
		1713	# for async_pool speedup
1101	void	1714	void
1102	schedule(...)	1715	_pool_1 (SV *cb)
1103	PROTOTYPE:
1104	CODE:	1716	CODE:
1105	api_schedule ();	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	coro->defoutgv = SvREFCNT_inc (PL_defoutgv);
		1726
		1727	if (!invoke)
		1728	croak ("\3terminate\2\n");
		1729
		1730	hv_store (hv, "desc", sizeof ("desc") - 1,
		1731	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1732
		1733	invoke_av = (AV *)SvRV (invoke);
		1734	len = av_len (invoke_av);
		1735
		1736	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1737
		1738	if (len > 0)
		1739	{
		1740	av_fill (defav, len - 1);
		1741	for (i = 0; i < len; ++i)
		1742	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1743	}
		1744
		1745
		1746
		1747	SvREFCNT_dec (invoke);
		1748	}
1106		1749
1107	void	1750	void
1108	cede(...)	1751	_pool_2 (SV *cb)
1109	PROTOTYPE:
1110	CODE:	1752	CODE:
1111	api_cede ();	1753	{
		1754	struct coro *coro = SvSTATE (coro_current);
1112		1755
1113	# and these are hacks	1756	sv_setsv (cb, &PL_sv_undef);
		1757
		1758	SvREFCNT_dec (PL_defoutgv); PL_defoutgv = coro->defoutgv;
		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
		1777	MODULE = Coro::State PACKAGE = Coro::AIO
		1778
1114	SV *	1779	SV *
1115	_aio_get_state ()	1780	_get_state ()
1116	CODE:	1781	CODE:
1117	{	1782	{
1118	struct {	1783	struct io_state *data;
1119	int errorno;
1120	int laststype;
1121	int laststatval;
1122	Stat_t statcache;
1123	} data;
1124		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
1125	data.errorno = errno;	1790	data->errorno = errno;
1126	data.laststype = PL_laststype;	1791	data->laststype = PL_laststype;
1127	data.laststatval = PL_laststatval;	1792	data->laststatval = PL_laststatval;
1128	data.statcache = PL_statcache;	1793	data->statcache = PL_statcache;
1129
1130	RETVAL = newSVpvn ((char *)&data, sizeof data);
1131	}	1794	}
1132	OUTPUT:	1795	OUTPUT:
1133	RETVAL	1796	RETVAL
1134		1797
1135	void	1798	void
1136	_aio_set_state (char *data_)	1799	_set_state (char *data_)
1137	PROTOTYPE: $	1800	PROTOTYPE: $
1138	CODE:	1801	CODE:
1139	{	1802	{
1140	struct {	1803	struct io_state data = (void )data_;
1141	int errorno;
1142	int laststype;
1143	int laststatval;
1144	Stat_t statcache;
1145	} data = (void )data_;
1146		1804
1147	errno = data->errorno;	1805	errno = data->errorno;
1148	PL_laststype = data->laststype;	1806	PL_laststype = data->laststype;
1149	PL_laststatval = data->laststatval;	1807	PL_laststatval = data->laststatval;
1150	PL_statcache = data->statcache;	1808	PL_statcache = data->statcache;
1151	}	1809	}
		1810

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Comparing Coro/Coro/State.xs (file contents): Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs. Revision 1.181 by root, Wed Oct 3 17:37:33 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.181 by root, Wed Oct 3 17:37:33 2007 UTC