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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.82 by root, Mon Nov 20 22:26:16 2006 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 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 optional C context */	185	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	186	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109
110	/* optionally saved, might be zero */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149		187
150	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
151	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	IO 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 switches to this coro */
		207
		208	/* coro process data */
		209	int prio;
		210
		211	/* linked list */
		212	struct coro next, prev;
		213	HV hv; / the perl hash associated with this coro, if any */
152	};	214	};
153		215
154	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
156		218
		219	/ Coro ******************************************************************/
		220
		221	#define PRIO_MAX 3
		222	#define PRIO_HIGH 1
		223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/ lowlevel stuff ********************************************************/
		235
157	static AV *	236	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
159	{	238	{
160	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
161	AV newpadlist, newpad;	240	AV newpadlist, newpad;
162		241
163	newpadlist = newAV ();	242	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	243	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	244	#if PERL_VERSION_ATLEAST (5,9,0)
		245	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		246	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	247	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	248	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	249	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	250	--AvFILLp (padlist);
172		251
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	252	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
217		296
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	297	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		298
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	299	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		300
		301	#define CORO_MAGIC(cv) \
		302	SvMAGIC (cv) \
		303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		304	? SvMAGIC (cv) \
		305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		306	: 0
		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		333
222	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
223	static void	335	static void
224	get_padlist (pTHX_ CV *cv)	336	get_padlist (pTHX_ CV *cv)
225	{	337	{
226	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	338	MAGIC *mg = CORO_MAGIC (cv);
		339	AV *av;
227		340
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	343	else
231	{	344	{
232	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
233	/* this should work - but it doesn't :( */	346	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	347	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
238	#else	351	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
242	}	355	}
243		356
244	static void	357	static void
245	put_padlist (pTHX_ CV *cv)	358	put_padlist (pTHX_ CV *cv)
246	{	359	{
247	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	360	MAGIC *mg = CORO_MAGIC (cv);
		361	AV *av;
248		362
249	if (!mg)	363	if (!mg)
250	{	364	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	365	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	366	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	367	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	368	mg->mg_obj = (SV *)newAV ();
255	}	369	}
256		370
257	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	371	av = (AV *)mg->mg_obj;
258	}
259		372
260	#define SB do {	373	if (AvFILLp (av) >= AvMAX (av))
261	#define SE } while (0)	374	av_extend (av, AvMAX (av) + 1);
262		375
263	#define LOAD(state) load_state(aTHX_ (state));	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	377	}
265		378
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	379	/ load & save, init *****************************************************/
267		380
268	static void	381	static void
269	load_state(pTHX_ Coro__State c)	382	load_perl (pTHX_ Coro__State c)
270	{	383	{
271	PL_dowarn = c->dowarn;	384	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	385	# include "state.h"
		386	#undef VAR
273		387
274	PL_curstackinfo = c->curstackinfo;	388	GvSV (PL_defgv) = c->defsv;
275	PL_curstack = c->curstack;	389	GvAV (PL_defgv) = c->defav;
276	PL_mainstack = c->mainstack;	390	GvSV (PL_errgv) = c->errsv;
277	PL_stack_sp = c->stack_sp;	391	PL_defoutgv = c->deffh;
278	PL_op = c->op;	392	PL_rs = c->irssv;
279	PL_curpad = c->curpad;	393	GvSV (irsgv) = c->irssv_sv;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		394
310	{	395	{
311	dSP;	396	dSP;
312	CV *cv;	397	CV *cv;
313		398
314	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
316	{	401	{
317	AV padlist = (AV )POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	403	CvDEPTH (cv) = PTR2IV (POPs);
323	}	404	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	405	}
327		406
328	PUTBACK;	407	PUTBACK;
329	}	408	}
330	}	409	}
331		410
332	static void	411	static void
333	save_state(pTHX_ Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
334	{	413	{
335	{	414	{
336	dSP;	415	dSP;
337	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	420	/*
342	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
344	*/	423	*/
345		424
346	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
348	for (;;)	427	for (;;)
349	{	428	{
350	while (cxix >= 0)	429	while (cxix >= 0)
351	{	430	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
353		432
354	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
355	{	434	{
356	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
		436
357	if (CvDEPTH(cv))	437	if (CvDEPTH (cv))
358	{	438	{
359	EXTEND (SP, CvDEPTH(cv)*2);	439	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	440	PUSHs ((SV *)CvPADLIST (cv));
		441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
370		443
		444	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	445	get_padlist (aTHX_ cv);
372	}	446	}
373	}	447	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	448	}
383		449
384	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
385	break;	451	break;
386		452
387	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
390	}	456	}
391		457
392	PUTBACK;	458	PUTBACK;
393	}	459	}
394		460
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = PL_defoutgv;
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
398		467
399	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	469	# include "state.h"
401		470	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	471	}
434		472
435	/*	473	/*
436	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
440	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
441	static void	482	static void
442	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
443	{	484	{
444	LOCK;	485	PL_curstackinfo = new_stackinfo(64, 6);
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		489
451	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		493
455	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
456	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	497	PL_tmps_max = 64;
459		498
460	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
461	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
463		502
…		…
467		506
468	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
469	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
471		510
472	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
473	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	513	PL_savestack_max = 64;
475		514
476	#if PERL_VERSION < 9	515	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
478	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	518	PL_retstack_max = 4;
480	#endif	519	#endif
481
482	UNLOCK;
483	}	520	}
		521	#endif
484		522
485	/*	523	/*
486	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
487	*/	525	*/
488	static void	526	static void
489	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
490	{	528	{
491	if (!IN_DESTRUCT)
492	{
493	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);
495
496	/* sure it is, but more important: is it correct?? :/ */
497	FREETMPS;
498
499	/POPSTACK_TO (PL_mainstack);//D//use/
500	}
501
502	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
503	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
504		531
505	while (PL_curstackinfo)	532	while (PL_curstackinfo)
506	{	533	{
507	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
508		535
509	{ /D//remove/
510	dSP;
511	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512	PUTBACK; /* possibly superfluous */
513	}
514
515	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
516	{
517	dounwind (-1);/D//remove/
518	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
519	}
520		538
521	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
522	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
523	PL_curstackinfo = p;	541	PL_curstackinfo = p;
524	}	542	}
525		543
526	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	545	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	547	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	549	Safefree (PL_retstack);
532	#endif	550	#endif
533	}	551	}
534		552
535	static void	553	static size_t
536	allocate_stack (Coro__State ctx, int alloc)	554	coro_rss (pTHX_ struct coro *coro)
537	{	555	{
538	coro_stack *stack;	556	size_t rss = sizeof (coro);
539		557
540	New (0, stack, 1, coro_stack);	558	if (coro->mainstack)
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{	559	{
548	#if HAVE_MMAP	560	if (coro->flags & CF_RUNNING)
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{	561	{
553	# if STACKGUARD	562	#define VAR(name,type)coro->name = PL_ ## name;
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	563	# include "state.h"
555	# endif	564	#undef VAR
556	}	565	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566		566
567	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
568	}	568	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
569		575
570	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
571	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
572	{	578	#endif
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{	579	}
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587		580
588	Safefree (stack);	581	return rss;
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}	582	}
594		583
		584	/ coroutine stack handling **********************************************/
		585
595	static void	586	static void
596	setup_coro (void *arg)	587	coro_setup (pTHX_ struct coro *coro)
597	{	588	{
598	/*	589	/*
599	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
600	*/	591	*/
		592	coro_init_stacks (aTHX);
		593
		594	PL_runops = RUNOPS_DEFAULT;
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	PL_defoutgv = newGVgen ("Coro");
		612	GvIOp(PL_defoutgv) = io;
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) \|= IOf_FLUSH;
		616	}
		617
		618	{
		619	dSP;
		620	LOGOP myop;
		621
		622	Zero (&myop, 1, LOGOP);
		623	myop.op_next = Nullop;
		624	myop.op_flags = OPf_WANT_VOID;
		625
		626	PUSHMARK (SP);
		627	XPUSHs (av_shift (GvAV (PL_defgv)));
		628	PUTBACK;
		629	PL_op = (OP *)&myop;
		630	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		631	SPAGAIN;
		632	}
		633
		634	ENTER; /* necessary e.g. for dounwind */
		635	}
		636
		637	static void
		638	coro_destroy (pTHX_ struct coro *coro)
		639	{
		640	if (!IN_DESTRUCT)
		641	{
		642	/* restore all saved variables and stuff */
		643	LEAVE_SCOPE (0);
		644	assert (PL_tmps_floor == -1);
		645
		646	/* free all temporaries */
		647	FREETMPS;
		648	assert (PL_tmps_ix == -1);
		649
		650	/* unwind all extra stacks */
		651	POPSTACK_TO (PL_mainstack);
		652
		653	/* unwind main stack */
		654	dounwind (-1);
		655	}
		656
		657	SvREFCNT_dec (GvSV (PL_defgv));
		658	SvREFCNT_dec (GvAV (PL_defgv));
		659	SvREFCNT_dec (GvSV (PL_errgv));
		660	SvREFCNT_dec (PL_defoutgv);
		661	SvREFCNT_dec (PL_rs);
		662	SvREFCNT_dec (GvSV (irsgv));
		663
		664	coro_destroy_stacks (aTHX);
		665	}
		666
		667	static void
		668	free_coro_mortal (pTHX)
		669	{
		670	if (coro_mortal)
		671	{
		672	SvREFCNT_dec (coro_mortal);
		673	coro_mortal = 0;
		674	}
		675	}
		676
		677	static int
		678	runops_trace (pTHX)
		679	{
		680	COP *oldcop = 0;
		681	int oldcxix = -2;
		682	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		683	coro_cctx *cctx = coro->cctx;
		684
		685	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		686	{
		687	PERL_ASYNC_CHECK ();
		688
		689	if (cctx->flags & CC_TRACE_ALL)
		690	{
		691	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		692	{
		693	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		694	SV bot, top;
		695	AV av = newAV (); / return values */
		696	SV **cb;
		697	dSP;
		698
		699	GV *gv = CvGV (cx->blk_sub.cv);
		700	SV *fullname = sv_2mortal (newSV (0));
		701	if (isGV (gv))
		702	gv_efullname3 (fullname, gv, 0);
		703
		704	bot = PL_stack_base + cx->blk_oldsp + 1;
		705	top = cx->blk_gimme == G_ARRAY ? SP + 1
		706	: cx->blk_gimme == G_SCALAR ? bot + 1
		707	: bot;
		708
		709	while (bot < top)
		710	av_push (av, SvREFCNT_inc (*bot++));
		711
		712	PL_runops = RUNOPS_DEFAULT;
		713	ENTER;
		714	SAVETMPS;
		715	EXTEND (SP, 3);
		716	PUSHMARK (SP);
		717	PUSHs (&PL_sv_no);
		718	PUSHs (fullname);
		719	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		720	PUTBACK;
		721	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		722	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		723	SPAGAIN;
		724	FREETMPS;
		725	LEAVE;
		726	PL_runops = runops_trace;
		727	}
		728
		729	if (oldcop != PL_curcop)
		730	{
		731	oldcop = PL_curcop;
		732
		733	if (PL_curcop != &PL_compiling)
		734	{
		735	SV **cb;
		736
		737	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		738	{
		739	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		740
		741	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		742	{
		743	runops_proc_t old_runops = PL_runops;
		744	dSP;
		745	GV *gv = CvGV (cx->blk_sub.cv);
		746	SV *fullname = sv_2mortal (newSV (0));
		747
		748	if (isGV (gv))
		749	gv_efullname3 (fullname, gv, 0);
		750
		751	PL_runops = RUNOPS_DEFAULT;
		752	ENTER;
		753	SAVETMPS;
		754	EXTEND (SP, 3);
		755	PUSHMARK (SP);
		756	PUSHs (&PL_sv_yes);
		757	PUSHs (fullname);
		758	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		759	PUTBACK;
		760	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		761	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		762	SPAGAIN;
		763	FREETMPS;
		764	LEAVE;
		765	PL_runops = runops_trace;
		766	}
		767
		768	oldcxix = cxstack_ix;
		769	}
		770
		771	if (cctx->flags & CC_TRACE_LINE)
		772	{
		773	dSP;
		774
		775	PL_runops = RUNOPS_DEFAULT;
		776	ENTER;
		777	SAVETMPS;
		778	EXTEND (SP, 3);
		779	PL_runops = RUNOPS_DEFAULT;
		780	PUSHMARK (SP);
		781	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		782	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		783	PUTBACK;
		784	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		785	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		786	SPAGAIN;
		787	FREETMPS;
		788	LEAVE;
		789	PL_runops = runops_trace;
		790	}
		791	}
		792	}
		793	}
		794	}
		795
		796	TAINT_NOT;
		797	return 0;
		798	}
		799
		800	/* inject a fake call to Coro::State::_cctx_init into the execution */
		801	/* _cctx_init should be careful, as it could be called at almost any time */
		802	/* during execution of a perl program */
		803	static void NOINLINE
		804	prepare_cctx (pTHX_ coro_cctx *cctx)
		805	{
		806	dSP;
		807	LOGOP myop;
		808
		809	PL_top_env = &PL_start_env;
		810
		811	if (cctx->flags & CC_TRACE)
		812	PL_runops = runops_trace;
		813
		814	Zero (&myop, 1, LOGOP);
		815	myop.op_next = PL_op;
		816	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		817
		818	PUSHMARK (SP);
		819	EXTEND (SP, 2);
		820	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		821	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		822	PUTBACK;
		823	PL_op = (OP *)&myop;
		824	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		825	SPAGAIN;
		826	}
		827
		828	/*
		829	* this is a _very_ stripped down perl interpreter ;)
		830	*/
		831	static void
		832	coro_run (void *arg)
		833	{
601	dTHX;	834	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
605		835
606	coro_init_stacks (aTHX);	836	/* coro_run is the alternative tail of transfer(), so unlock here. */
607	/PL_curcop = 0;/	837	UNLOCK;
608	/PL_in_eval = PL_in_eval;/ /* inherit */
609	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
611		838
612	SPAGAIN;	839	/* we now skip the entersub that lead to transfer() */
		840	PL_op = PL_op->op_next;
613		841
614	if (ctx->stack)	842	/* inject a fake subroutine call to cctx_init */
615	{	843	prepare_cctx (aTHX_ (coro_cctx *)arg);
616	ctx->cursp = 0;
617		844
618	PUSHMARK(SP);	845	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PUTBACK;	846	PL_restartop = PL_op;
620	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);	847	perl_run (PL_curinterp);
621		848
622	if (SvTRUE (ERRSV))	849	/*
623	croak (NULL);	850	* If perl-run returns we assume exit() was being called or the coro
624	else	851	* fell off the end, which seems to be the only valid (non-bug)
625	croak ("FATAL: CCTXT coroutine returned!");	852	* reason for perl_run to return. We try to exit by jumping to the
		853	* bootstrap-time "top" top_env, as we cannot restore the "main"
		854	* coroutine as Coro has no such concept
		855	*/
		856	PL_top_env = main_top_env;
		857	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		858	}
		859
		860	static coro_cctx *
		861	cctx_new ()
		862	{
		863	coro_cctx *cctx;
		864	void *stack_start;
		865	size_t stack_size;
		866
		867	++cctx_count;
		868
		869	Newz (0, cctx, 1, coro_cctx);
		870
		871	#if HAVE_MMAP
		872
		873	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		874	/* mmap supposedly does allocate-on-write for us */
		875	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		876
		877	if (cctx->sptr != (void *)-1)
		878	{
		879	# if CORO_STACKGUARD
		880	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		881	# endif
		882	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		883	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		884	cctx->flags \|= CC_MAPPED;
626	}	885	}
627	else	886	else
628	{	887	#endif
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;
649
650	ENTER; /* necessary e.g. for dounwind */
651	}	888	{
652	}	889	cctx->ssize = coro_stacksize * (long)sizeof (long);
		890	New (0, cctx->sptr, coro_stacksize, long);
653		891
654	static void	892	if (!cctx->sptr)
655	continue_coro (void *arg)	893	{
656	{	894	perror ("FATAL: unable to allocate stack for coroutine");
657	/*	895	_exit (EXIT_FAILURE);
658	* this is a _very_ stripped down perl interpreter ;)	896	}
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662		897
663	PL_top_env = &PL_start_env;	898	stack_start = cctx->sptr;
		899	stack_size = cctx->ssize;
		900	}
664		901
665	ctx->cursp = 0;	902	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
666	PL_op = PL_op->op_next;	903	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
667	CALLRUNOPS(aTHX);
668		904
669	abort ();	905	return cctx;
670	}	906	}
671		907
672	static void	908	static void
		909	cctx_destroy (coro_cctx *cctx)
		910	{
		911	if (!cctx)
		912	return;
		913
		914	--cctx_count;
		915
		916	#if CORO_USE_VALGRIND
		917	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		918	#endif
		919
		920	#if HAVE_MMAP
		921	if (cctx->flags & CC_MAPPED)
		922	munmap (cctx->sptr, cctx->ssize);
		923	else
		924	#endif
		925	Safefree (cctx->sptr);
		926
		927	Safefree (cctx);
		928	}
		929
		930	static coro_cctx *
		931	cctx_get (pTHX)
		932	{
		933	while (cctx_first)
		934	{
		935	coro_cctx *cctx = cctx_first;
		936	cctx_first = cctx->next;
		937	--cctx_idle;
		938
		939	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		940	return cctx;
		941
		942	cctx_destroy (cctx);
		943	}
		944
		945	return cctx_new ();
		946	}
		947
		948	static void
		949	cctx_put (coro_cctx *cctx)
		950	{
		951	/* free another cctx if overlimit */
		952	if (cctx_idle >= MAX_IDLE_CCTX)
		953	{
		954	coro_cctx *first = cctx_first;
		955	cctx_first = first->next;
		956	--cctx_idle;
		957
		958	cctx_destroy (first);
		959	}
		960
		961	++cctx_idle;
		962	cctx->next = cctx_first;
		963	cctx_first = cctx;
		964	}
		965
		966	/ coroutine switching ***************************************************/
		967
		968	static void NOINLINE
		969	transfer_check (pTHX_ struct coro prev, struct coro next)
		970	{
		971	if (prev != next)
		972	{
		973	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		974	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		975
		976	if (next->flags & CF_RUNNING)
		977	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		978
		979	if (next->flags & CF_DESTROYED)
		980	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		981
		982	if (PL_lex_state != LEX_NOTPARSING)
		983	croak ("Coro::State::transfer called while parsing, but this is not supported");
		984	}
		985	}
		986
		987	/* always use the TRANSFER macro */
		988	static void NOINLINE
673	transfer (pTHX_ struct coro prev, struct coro next, int flags)	989	transfer (pTHX_ struct coro prev, struct coro next)
674	{	990	{
675	dSTACKLEVEL;	991	dSTACKLEVEL;
676		992
		993	/* sometimes transfer is only called to set idle_sp */
		994	if (!next)
		995	{
		996	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		997	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		998	}
677	if (prev != next)	999	else if (prev != next)
678	{	1000	{
679	/* has this coro been created yet? */	1001	coro_cctx *prev__cctx;
680	if (next->mainstack)	1002
		1003	if (prev->flags & CF_NEW)
681	{	1004	{
682	LOCK;	1005	/* create a new empty context */
683	SAVE (prev, flags);	1006	Newz (0, prev->cctx, 1, coro_cctx);
684	LOAD (next);	1007	prev->flags &= ~CF_NEW;
685	UNLOCK;	1008	prev->flags \|= CF_RUNNING;
686
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	prev->cursp = stacklevel;
715	/* don't add any code here */
716	}
717	else
718	next->cursp = stacklevel;
719	}	1009	}
720	else if (next->tmps_ix == -2)	1010
721	croak ("tried to transfer to running coroutine");	1011	prev->flags &= ~CF_RUNNING;
		1012	next->flags \|= CF_RUNNING;
		1013
		1014	LOCK;
		1015
		1016	if (next->flags & CF_NEW)
		1017	{
		1018	/* need to start coroutine */
		1019	next->flags &= ~CF_NEW;
		1020	/* first get rid of the old state */
		1021	save_perl (aTHX_ prev);
		1022	/* setup coroutine call */
		1023	coro_setup (aTHX_ next);
		1024	}
722	else	1025	else
723	{	1026	{
724	LOCK;	1027	/* coroutine already started */
725	SAVE (prev, -1); /* first get rid of the old state */	1028	save_perl (aTHX_ prev);
726	UNLOCK;	1029	load_perl (aTHX_ next);
727
728	/* create the coroutine for the first time */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733
734	/* the new coroutine starts with start_env again */
735	PL_top_env = &PL_start_env;
736
737	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
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	}	1030	}
765	}
766		1031
767	LOCK;	1032	prev__cctx = prev->cctx;
768	if (coro_mortal)	1033
769	{	1034	/* possibly "free" the cctx */
770	SvREFCNT_dec (coro_mortal);	1035	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
771	coro_mortal = 0;	1036	{
772	}	1037	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1038	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1039
		1040	prev->cctx = 0;
		1041
		1042	cctx_put (prev__cctx);
		1043	}
		1044
		1045	++next->usecount;
		1046
		1047	if (!next->cctx)
		1048	next->cctx = cctx_get (aTHX);
		1049
		1050	if (prev__cctx != next->cctx)
		1051	{
		1052	prev__cctx->top_env = PL_top_env;
		1053	PL_top_env = next->cctx->top_env;
		1054	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1055	}
		1056
		1057	free_coro_mortal (aTHX);
773	UNLOCK;	1058	UNLOCK;
		1059	}
774	}	1060	}
775		1061
776	#define SV_CORO(sv,func) \	1062	struct transfer_args
777	do { \	1063	{
778	if (SvROK (sv)) \	1064	struct coro prev, next;
779	sv = SvRV (sv); \	1065	};
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		1066
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1067	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1068	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
798		1069
		1070	/ high level stuff ******************************************************/
		1071
799	static void	1072	static int
		1073	coro_state_destroy (pTHX_ struct coro *coro)
		1074	{
		1075	if (coro->flags & CF_DESTROYED)
		1076	return 0;
		1077
		1078	coro->flags \|= CF_DESTROYED;
		1079
		1080	if (coro->flags & CF_READY)
		1081	{
		1082	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1083	/* alternative: look through all ready queues and remove the coro */
		1084	LOCK;
		1085	--coro_nready;
		1086	UNLOCK;
		1087	}
		1088	else
		1089	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1090
		1091	if (coro->mainstack && coro->mainstack != main_mainstack)
		1092	{
		1093	struct coro temp;
		1094
		1095	if (coro->flags & CF_RUNNING)
		1096	croak ("FATAL: tried to destroy currently running coroutine");
		1097
		1098	save_perl (aTHX_ &temp);
		1099	load_perl (aTHX_ coro);
		1100
		1101	coro_destroy (aTHX_ coro);
		1102
		1103	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1104
		1105	coro->mainstack = 0;
		1106	}
		1107
		1108	cctx_destroy (coro->cctx);
		1109	SvREFCNT_dec (coro->args);
		1110
		1111	if (coro->next) coro->next->prev = coro->prev;
		1112	if (coro->prev) coro->prev->next = coro->next;
		1113	if (coro == coro_first) coro_first = coro->next;
		1114
		1115	return 1;
		1116	}
		1117
		1118	static int
		1119	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1120	{
		1121	struct coro coro = (struct coro )mg->mg_ptr;
		1122	mg->mg_ptr = 0;
		1123
		1124	coro->hv = 0;
		1125
		1126	if (--coro->refcnt < 0)
		1127	{
		1128	coro_state_destroy (aTHX_ coro);
		1129	Safefree (coro);
		1130	}
		1131
		1132	return 0;
		1133	}
		1134
		1135	static int
		1136	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1137	{
		1138	struct coro coro = (struct coro )mg->mg_ptr;
		1139
		1140	++coro->refcnt;
		1141
		1142	return 0;
		1143	}
		1144
		1145	static MGVTBL coro_state_vtbl = {
		1146	0, 0, 0, 0,
		1147	coro_state_free,
		1148	0,
		1149	#ifdef MGf_DUP
		1150	coro_state_dup,
		1151	#else
		1152	# define MGf_DUP 0
		1153	#endif
		1154	};
		1155
		1156	static void
		1157	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1158	{
		1159	ta->prev = SvSTATE (prev_sv);
		1160	ta->next = SvSTATE (next_sv);
		1161	TRANSFER_CHECK (*ta);
		1162	}
		1163
		1164	static void
800	api_transfer(pTHX_ SV prev, SV next, int flags)	1165	api_transfer (SV prev_sv, SV next_sv)
801	{	1166	{
802	SV_CORO (prev, "Coro::transfer");	1167	dTHX;
803	SV_CORO (next, "Coro::transfer");	1168	struct transfer_args ta;
804		1169
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1170	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1171	TRANSFER (ta);
806	}	1172	}
807		1173
808	/ Coro ******************************************************************/	1174	/ Coro ******************************************************************/
809		1175
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	1176	static void
823	coro_enq (pTHX_ SV *sv)	1177	coro_enq (pTHX_ SV *coro_sv)
824	{	1178	{
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);	1179	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1180	}
841		1181
842	static SV *	1182	static SV *
843	coro_deq (pTHX_ int min_prio)	1183	coro_deq (pTHX_ int min_prio)
844	{	1184	{
…		…
847	min_prio -= PRIO_MIN;	1187	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1188	if (min_prio < 0)
849	min_prio = 0;	1189	min_prio = 0;
850		1190
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1191	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (AvFILLp (coro_ready[prio]) >= 0)	1192	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1193	return av_shift (coro_ready [prio]);
856	}
857		1194
858	return 0;	1195	return 0;
859	}	1196	}
860		1197
861	static void	1198	static int
862	api_ready (SV *coro)	1199	api_ready (SV *coro_sv)
863	{	1200	{
864	dTHX;	1201	dTHX;
		1202	struct coro *coro;
865		1203
866	if (SvROK (coro))	1204	if (SvROK (coro_sv))
867	coro = SvRV (coro);	1205	coro_sv = SvRV (coro_sv);
		1206
		1207	coro = SvSTATE (coro_sv);
		1208
		1209	if (coro->flags & CF_READY)
		1210	return 0;
		1211
		1212	coro->flags \|= CF_READY;
868		1213
869	LOCK;	1214	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1215	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1216	++coro_nready;
871	UNLOCK;	1217	UNLOCK;
		1218
		1219	return 1;
		1220	}
		1221
		1222	static int
		1223	api_is_ready (SV *coro_sv)
		1224	{
		1225	dTHX;
		1226	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1227	}
		1228
		1229	static void
		1230	prepare_schedule (pTHX_ struct transfer_args *ta)
		1231	{
		1232	SV prev_sv, next_sv;
		1233
		1234	for (;;)
		1235	{
		1236	LOCK;
		1237	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1238
		1239	/* nothing to schedule: call the idle handler */
		1240	if (!next_sv)
		1241	{
		1242	dSP;
		1243	UNLOCK;
		1244
		1245	ENTER;
		1246	SAVETMPS;
		1247
		1248	PUSHMARK (SP);
		1249	PUTBACK;
		1250	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1251
		1252	FREETMPS;
		1253	LEAVE;
		1254	continue;
		1255	}
		1256
		1257	ta->next = SvSTATE (next_sv);
		1258
		1259	/* cannot transfer to destroyed coros, skip and look for next */
		1260	if (ta->next->flags & CF_DESTROYED)
		1261	{
		1262	UNLOCK;
		1263	SvREFCNT_dec (next_sv);
		1264	/* coro_nready is already taken care of by destroy */
		1265	continue;
		1266	}
		1267
		1268	--coro_nready;
		1269	UNLOCK;
		1270	break;
		1271	}
		1272
		1273	/* free this only after the transfer */
		1274	prev_sv = SvRV (coro_current);
		1275	ta->prev = SvSTATE (prev_sv);
		1276	TRANSFER_CHECK (*ta);
		1277	assert (ta->next->flags & CF_READY);
		1278	ta->next->flags &= ~CF_READY;
		1279	SvRV_set (coro_current, next_sv);
		1280
		1281	LOCK;
		1282	free_coro_mortal (aTHX);
		1283	coro_mortal = prev_sv;
		1284	UNLOCK;
		1285	}
		1286
		1287	static void
		1288	prepare_cede (pTHX_ struct transfer_args *ta)
		1289	{
		1290	api_ready (coro_current);
		1291	prepare_schedule (aTHX_ ta);
		1292	}
		1293
		1294	static int
		1295	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1296	{
		1297	if (coro_nready)
		1298	{
		1299	SV *prev = SvRV (coro_current);
		1300	prepare_schedule (aTHX_ ta);
		1301	api_ready (prev);
		1302	return 1;
		1303	}
		1304	else
		1305	return 0;
872	}	1306	}
873		1307
874	static void	1308	static void
875	api_schedule (void)	1309	api_schedule (void)
876	{	1310	{
877	dTHX;	1311	dTHX;
		1312	struct transfer_args ta;
878		1313
879	SV prev, next;	1314	prepare_schedule (aTHX_ &ta);
880		1315	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	}	1316	}
902		1317
903	static void	1318	static int
904	api_cede (void)	1319	api_cede (void)
905	{	1320	{
906	dTHX;	1321	dTHX;
		1322	struct transfer_args ta;
907		1323
908	LOCK;	1324	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1325
912	api_schedule ();	1326	if (ta.prev != ta.next)
		1327	{
		1328	TRANSFER (ta);
		1329	return 1;
		1330	}
		1331	else
		1332	return 0;
913	}	1333	}
914		1334
		1335	static int
		1336	api_cede_notself (void)
		1337	{
		1338	dTHX;
		1339	struct transfer_args ta;
		1340
		1341	if (prepare_cede_notself (aTHX_ &ta))
		1342	{
		1343	TRANSFER (ta);
		1344	return 1;
		1345	}
		1346	else
		1347	return 0;
		1348	}
		1349
		1350	static void
		1351	api_trace (SV *coro_sv, int flags)
		1352	{
		1353	dTHX;
		1354	struct coro *coro = SvSTATE (coro_sv);
		1355
		1356	if (flags & CC_TRACE)
		1357	{
		1358	if (!coro->cctx)
		1359	coro->cctx = cctx_new ();
		1360	else if (!(coro->cctx->flags & CC_TRACE))
		1361	croak ("cannot enable tracing on coroutine with custom stack");
		1362
		1363	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1364	}
		1365	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1366	{
		1367	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1368
		1369	if (coro->flags & CF_RUNNING)
		1370	PL_runops = RUNOPS_DEFAULT;
		1371	else
		1372	coro->runops = RUNOPS_DEFAULT;
		1373	}
		1374	}
		1375
915	MODULE = Coro::State PACKAGE = Coro::State	1376	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1377
917	PROTOTYPES: ENABLE	1378	PROTOTYPES: DISABLE
918		1379
919	BOOT:	1380	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1381	{
921	#ifdef USE_ITHREADS	1382	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1383	MUTEX_INIT (&coro_mutex);
923	#endif	1384	#endif
924	BOOT_PAGESIZE;	1385	BOOT_PAGESIZE;
925		1386
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1387	irsgv = gv_fetchpv ("/", 1, SVt_PV);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1388
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1389	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1390
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1394	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934		1395
935	main_mainstack = PL_mainstack;	1396	main_mainstack = PL_mainstack;
		1397	main_top_env = PL_top_env;
		1398
		1399	while (main_top_env->je_prev)
		1400	main_top_env = main_top_env->je_prev;
936		1401
937	coroapi.ver = CORO_API_VERSION;	1402	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1403	coroapi.transfer = api_transfer;
939	}
940		1404
941	Coro::State	1405	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1406	}
943	SV * args	1407
944	PROTOTYPE: $	1408	SV *
		1409	new (char *klass, ...)
945	CODE:	1410	CODE:
946	Coro__State coro;	1411	{
		1412	struct coro *coro;
		1413	HV *hv;
		1414	int i;
947		1415
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);	1416	Newz (0, coro, 1, struct coro);
		1417	coro->args = newAV ();
		1418	coro->flags = CF_NEW;
952		1419
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1420	if (coro_first) coro_first->prev = coro;
954	/coro->mainstack = 0; //actual work is done inside transfer /	1421	coro->next = coro_first;
955	/coro->stack = 0;/	1422	coro_first = coro;
956		1423
957	RETVAL = coro;	1424	coro->hv = hv = newHV ();
		1425	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1426	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1427
		1428	for (i = 1; i < items; i++)
		1429	av_push (coro->args, newSVsv (ST (i)));
		1430	}
958	OUTPUT:	1431	OUTPUT:
959	RETVAL	1432	RETVAL
960		1433
		1434	# these not obviously related functions are all rolled into the same xs
		1435	# function to increase chances that they all will call transfer with the same
		1436	# stack offset
961	void	1437	void
962	transfer(prev, next, flags)	1438	_set_stacklevel (...)
963	SV *prev	1439	ALIAS:
964	SV *next	1440	Coro::State::transfer = 1
965	int flags	1441	Coro::schedule = 2
966	PROTOTYPE: @	1442	Coro::cede = 3
		1443	Coro::cede_notself = 4
967	CODE:	1444	CODE:
968	PUTBACK;	1445	{
969	SV_CORO (next, "Coro::transfer");	1446	struct transfer_args ta;
970	SV_CORO (prev, "Coro::transfer");	1447
971	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1448	switch (ix)
972	SPAGAIN;	1449	{
		1450	case 0:
		1451	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1452	ta.next = 0;
		1453	break;
		1454
		1455	case 1:
		1456	if (items != 2)
		1457	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1458
		1459	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1460	break;
		1461
		1462	case 2:
		1463	prepare_schedule (aTHX_ &ta);
		1464	break;
		1465
		1466	case 3:
		1467	prepare_cede (aTHX_ &ta);
		1468	break;
		1469
		1470	case 4:
		1471	if (!prepare_cede_notself (aTHX_ &ta))
		1472	XSRETURN_EMPTY;
		1473
		1474	break;
		1475	}
		1476
		1477	BARRIER;
		1478	TRANSFER (ta);
		1479
		1480	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1481	XSRETURN_YES;
		1482	}
		1483
		1484	bool
		1485	_destroy (SV *coro_sv)
		1486	CODE:
		1487	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1488	OUTPUT:
		1489	RETVAL
973		1490
974	void	1491	void
975	DESTROY(coro)
976	Coro::State coro
977	CODE:
978
979	if (coro->mainstack && coro->mainstack != main_mainstack)
980	{
981	struct coro temp;
982
983	PUTBACK;
984	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
985	LOAD (aTHX_ coro);
986	SPAGAIN;
987
988	destroy_stacks (aTHX);
989
990	LOAD ((&temp)); /* this will get rid of defsv etc.. */
991	SPAGAIN;
992
993	coro->mainstack = 0;
994	}
995
996	deallocate_stack (coro);
997	SvREFCNT_dec (coro->args);
998	Safefree (coro);
999
1000	void
1001	_exit(code)	1492	_exit (code)
1002	int code	1493	int code
1003	PROTOTYPE: $	1494	PROTOTYPE: $
1004	CODE:	1495	CODE:
1005	_exit (code);	1496	_exit (code);
1006		1497
1007	MODULE = Coro::State PACKAGE = Coro::Cont	1498	int
		1499	cctx_stacksize (int new_stacksize = 0)
		1500	CODE:
		1501	RETVAL = coro_stacksize;
		1502	if (new_stacksize)
		1503	coro_stacksize = new_stacksize;
		1504	OUTPUT:
		1505	RETVAL
		1506
		1507	int
		1508	cctx_count ()
		1509	CODE:
		1510	RETVAL = cctx_count;
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
		1515	cctx_idle ()
		1516	CODE:
		1517	RETVAL = cctx_idle;
		1518	OUTPUT:
		1519	RETVAL
1008		1520
1009	void	1521	void
1010	yield(...)	1522	list ()
1011	PROTOTYPE: @	1523	PPCODE:
		1524	{
		1525	struct coro *coro;
		1526	for (coro = coro_first; coro; coro = coro->next)
		1527	if (coro->hv)
		1528	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1529	}
		1530
		1531	void
		1532	call (Coro::State coro, SV *coderef)
		1533	ALIAS:
		1534	eval = 1
		1535	CODE:
		1536	{
		1537	if (coro->mainstack)
		1538	{
		1539	struct coro temp;
		1540	Zero (&temp, 1, struct coro);
		1541
		1542	if (!(coro->flags & CF_RUNNING))
		1543	{
		1544	save_perl (aTHX_ &temp);
		1545	load_perl (aTHX_ coro);
		1546	}
		1547
		1548	{
		1549	dSP;
		1550	ENTER;
		1551	SAVETMPS;
		1552	PUSHMARK (SP);
		1553	PUTBACK;
		1554	if (ix)
		1555	eval_sv (coderef, 0);
		1556	else
		1557	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1558	SPAGAIN;
		1559	FREETMPS;
		1560	LEAVE;
		1561	PUTBACK;
		1562	}
		1563
		1564	if (!(coro->flags & CF_RUNNING))
		1565	{
		1566	save_perl (aTHX_ coro);
		1567	load_perl (aTHX_ &temp);
		1568	}
		1569	}
		1570	}
		1571
		1572	SV *
		1573	is_ready (Coro::State coro)
		1574	PROTOTYPE: $
		1575	ALIAS:
		1576	is_ready = CF_READY
		1577	is_running = CF_RUNNING
		1578	is_new = CF_NEW
		1579	is_destroyed = CF_DESTROYED
		1580	CODE:
		1581	RETVAL = boolSV (coro->flags & ix);
		1582	OUTPUT:
		1583	RETVAL
		1584
		1585	void
		1586	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1587
		1588	SV *
		1589	has_stack (Coro::State coro)
		1590	PROTOTYPE: $
		1591	CODE:
		1592	RETVAL = boolSV (!!coro->cctx);
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	int
		1597	is_traced (Coro::State coro)
		1598	PROTOTYPE: $
		1599	CODE:
		1600	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1601	OUTPUT:
		1602	RETVAL
		1603
		1604	IV
		1605	rss (Coro::State coro)
		1606	PROTOTYPE: $
		1607	ALIAS:
		1608	usecount = 1
1012	CODE:	1609	CODE:
1013	SV *yieldstack;	1610	switch (ix)
1014	SV *sv;	1611	{
1015	AV *defav = GvAV (PL_defgv);	1612	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1016	struct coro prev, next;	1613	case 1: RETVAL = coro->usecount; break;
1017
1018	yieldstack = *hv_fetch (
1019	(HV *)SvRV (GvSV (coro_current)),
1020	"yieldstack", sizeof ("yieldstack") - 1,
1021	0	1614	}
1022	);	1615	OUTPUT:
		1616	RETVAL
1023		1617
1024	/* set up @_ -- ugly */
1025	av_clear (defav);
1026	av_fill (defav, items - 1);
1027	while (items--)
1028	av_store (defav, items, SvREFCNT_inc (ST(items)));
1029
1030	sv = av_pop ((AV *)SvRV (yieldstack));
1031	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));
1032	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));
1033	SvREFCNT_dec (sv);
1034
1035	transfer (aTHX_ prev, next, 0);
1036		1618
1037	MODULE = Coro::State PACKAGE = Coro	1619	MODULE = Coro::State PACKAGE = Coro
1038		1620
1039	BOOT:	1621	BOOT:
1040	{	1622	{
1041	int i;	1623	int i;
		1624
		1625	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1626	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1627	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1628
		1629	coro_current = get_sv ("Coro::current", FALSE);
		1630	SvREADONLY_on (coro_current);
		1631
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1632	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1633
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1634	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1635	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1636	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1637	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1638	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1639	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053		1640
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1641	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1642	coro_ready[i] = newAV ();
1056		1643
1057	{	1644	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1645	SV *sv = perl_get_sv("Coro::API", 1);
1059		1646
1060	coroapi.schedule = api_schedule;	1647	coroapi.schedule = api_schedule;
1061	coroapi.cede = api_cede;	1648	coroapi.cede = api_cede;
		1649	coroapi.cede_notself = api_cede_notself;
1062	coroapi.ready = api_ready;	1650	coroapi.ready = api_ready;
		1651	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1652	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1653	coroapi.current = coro_current;
1065		1654
1066	GCoroAPI = &coroapi;	1655	GCoroAPI = &coroapi;
1067	sv_setiv (sv, (IV)&coroapi);	1656	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on (sv);	1657	SvREADONLY_on (sv);
1069	}	1658	}
1070	}	1659	}
1071		1660
1072	#if !PERL_MICRO
1073
1074	void	1661	void
1075	ready(self)	1662	_set_current (SV *current)
1076	SV * self
1077	PROTOTYPE: $	1663	PROTOTYPE: $
1078	CODE:	1664	CODE:
1079	api_ready (self);	1665	SvREFCNT_dec (SvRV (coro_current));
1080		1666	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1081	#endif
1082		1667
1083	int	1668	int
		1669	prio (Coro::State coro, int newprio = 0)
		1670	ALIAS:
		1671	nice = 1
		1672	CODE:
		1673	{
		1674	RETVAL = coro->prio;
		1675
		1676	if (items > 1)
		1677	{
		1678	if (ix)
		1679	newprio = coro->prio - newprio;
		1680
		1681	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1682	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1683
		1684	coro->prio = newprio;
		1685	}
		1686	}
		1687	OUTPUT:
		1688	RETVAL
		1689
		1690	SV *
		1691	ready (SV *self)
		1692	PROTOTYPE: $
		1693	CODE:
		1694	RETVAL = boolSV (api_ready (self));
		1695	OUTPUT:
		1696	RETVAL
		1697
		1698	int
1084	nready(...)	1699	nready (...)
1085	PROTOTYPE:	1700	PROTOTYPE:
1086	CODE:	1701	CODE:
1087	RETVAL = coro_nready;	1702	RETVAL = coro_nready;
1088	OUTPUT:	1703	OUTPUT:
1089	RETVAL	1704	RETVAL
1090		1705
		1706	# for async_pool speedup
1091	void	1707	void
1092	schedule(...)	1708	_pool_1 (SV *cb)
1093	PROTOTYPE:
1094	CODE:	1709	CODE:
1095	api_schedule ();	1710	{
		1711	int i, len;
		1712	HV hv = (HV )SvRV (coro_current);
		1713	AV *defav = GvAV (PL_defgv);
		1714	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1715	AV *invoke_av;
		1716
		1717	if (!invoke)
		1718	croak ("\3terminate\2\n");
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
		1730	av_fill (defav, len - 1);
		1731	for (i = 0; i < len; ++i)
		1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
		1734
		1735	SvREFCNT_dec (invoke);
		1736	}
1096		1737
1097	void	1738	void
1098	cede(...)	1739	_pool_2 (SV *cb)
1099	PROTOTYPE:
1100	CODE:	1740	CODE:
1101	api_cede ();	1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
1102		1743
1103	# and these are hacks	1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1747	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1748	croak ("\3terminate\2\n");
		1749
		1750	av_clear (GvAV (PL_defgv));
		1751	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1752	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1753
		1754	coro->prio = 0;
		1755
		1756	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1757	api_trace (coro_current, 0);
		1758
		1759	av_push (av_async_pool, newSVsv (coro_current));
		1760	}
		1761
		1762
		1763	MODULE = Coro::State PACKAGE = Coro::AIO
		1764
1104	SV *	1765	SV *
1105	_aio_get_state ()	1766	_get_state ()
1106	CODE:	1767	CODE:
1107	{	1768	{
1108	struct {	1769	struct io_state *data;
1109	int errorno;
1110	int laststype;
1111	int laststatval;
1112	Stat_t statcache;
1113	} data;
1114		1770
		1771	RETVAL = newSV (sizeof (struct io_state));
		1772	data = (struct io_state *)SvPVX (RETVAL);
		1773	SvCUR_set (RETVAL, sizeof (struct io_state));
		1774	SvPOK_only (RETVAL);
		1775
1115	data.errorno = errno;	1776	data->errorno = errno;
1116	data.laststype = PL_laststype;	1777	data->laststype = PL_laststype;
1117	data.laststatval = PL_laststatval;	1778	data->laststatval = PL_laststatval;
1118	data.statcache = PL_statcache;	1779	data->statcache = PL_statcache;
1119
1120	RETVAL = newSVpvn ((char *)&data, sizeof data);
1121	}	1780	}
1122	OUTPUT:	1781	OUTPUT:
1123	RETVAL	1782	RETVAL
1124		1783
1125	void	1784	void
1126	_aio_set_state (char *data_)	1785	_set_state (char *data_)
1127	PROTOTYPE: $	1786	PROTOTYPE: $
1128	CODE:	1787	CODE:
1129	{	1788	{
1130	struct {	1789	struct io_state data = (void )data_;
1131	int errorno;
1132	int laststype;
1133	int laststatval;
1134	Stat_t statcache;
1135	} data = (void )data_;
1136		1790
1137	errno = data->errorno;	1791	errno = data->errorno;
1138	PL_laststype = data->laststype;	1792	PL_laststype = data->laststype;
1139	PL_laststatval = data->laststatval;	1793	PL_laststatval = data->laststatval;
1140	PL_statcache = data->statcache;	1794	PL_statcache = data->statcache;
1141	}	1795	}
		1796

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Comparing Coro/Coro/State.xs (file contents): Revision 1.82 by root, Mon Nov 20 22:26:16 2006 UTC vs. Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.82 by root, Mon Nov 20 22:26:16 2006 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC