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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.180 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 <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
34		79
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	81	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	82	#endif
53	# include <limits.h>	83
54	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	86	#endif
61	#endif
62		87
63	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
68		97
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		99
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
72		109
73	#include "CoroAPI.h"	110	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		111
77	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	116	#else
82	# define LOCK (void)0	117	# define LOCK (void)0
83	# define UNLOCK (void)0	118	# define UNLOCK (void)0
84	#endif	119	#endif
85		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
86	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
87	static AV main_mainstack; / used to differentiate between $main and others */	132	static AV main_mainstack; / used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
88	static HV coro_state_stash, coro_stash;	134	static HV coro_state_stash, coro_stash;
89	static SV coro_mortal; / will be freed after next transfer */	135	static SV coro_mortal; / will be freed after next transfer */
90		136
		137	static GV irsgv; / $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
		144	static struct coro_cctx *cctx_first;
		145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		154	};
		155
91	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	157	typedef struct coro_cctx {
93	struct coro_stack *next;	158	struct coro_cctx *next;
94		159
95	void idle_sp; / original stacklevel when coroutine was created */	160	/* the stack */
96	void *sptr;	161	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
98		163
99	/* cpu state */	164	/* cpu state */
		165	void idle_sp; / sp of top-level transfer/schedule/cede call */
		166	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		167	JMPENV *top_env;
100	coro_context cctx;	168	coro_context cctx;
101	JMPENV *top_env;
102	} coro_stack;
103		169
104	/* the (fake) coro_stack representing the main program */	170	#if CORO_USE_VALGRIND
105	static coro_stack *main_stack;	171	int valgrind_id;
		172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
		175
		176	enum {
		177	CF_RUNNING = 0x0001, /* coroutine is running */
		178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		181	};
106		182
107	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
108	struct coro {	184	struct coro {
109	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
110	coro_stack *stack;	186	coro_cctx *cctx;
111		187
112	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
113	AV *args;	189	AV *args;
114	int refcnt;	190	int refcnt;
		191	int flags; /* CF_ flags */
115		192
116	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
117	AV *defav;	194	AV defav; / @_ */
118	SV *defsv;	195	SV defsv; / $_ */
119	SV *errsv;	196	SV errsv; / $@ */
		197	IO deffh; / default filehandle */
		198	SV irssv; / $/ */
		199	SV irssv_sv; / real $/ cache */
120		200
121	/* saved global state not related to stacks */	201	#define VAR(name,type) type name;
122	U8 dowarn;	202	# include "state.h"
123	I32 in_eval;	203	#undef VAR
124		204
125	/* the stacks and related info (callchain etc..) */	205	/* statistics */
126	PERL_SI *curstackinfo;	206	int usecount; /* number of switches to this coro */
127	AV *curstack;
128	AV *mainstack;
129	SV **stack_sp;
130	OP *op;
131	SV **curpad;
132	AV *comppad;
133	CV *compcv;
134	SV **stack_base;
135	SV **stack_max;
136	SV **tmps_stack;
137	I32 tmps_floor;
138	I32 tmps_ix;
139	I32 tmps_max;
140	I32 *markstack;
141	I32 *markstack_ptr;
142	I32 *markstack_max;
143	I32 *scopestack;
144	I32 scopestack_ix;
145	I32 scopestack_max;
146	ANY *savestack;
147	I32 savestack_ix;
148	I32 savestack_max;
149	OP **retstack;
150	I32 retstack_ix;
151	I32 retstack_max;
152	PMOP *curpm;
153	COP *curcop;
154		207
155	/* coro process data */	208	/* coro process data */
156	int prio;	209	int prio;
		210
		211	/* linked list */
		212	struct coro next, prev;
		213	HV hv; / the perl hash associated with this coro, if any */
157	};	214	};
158		215
159	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
161		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
162	static AV *	236	static AV *
163	coro_clone_padlist (pTHX_ CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
164	{	238	{
165	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
166	AV newpadlist, newpad;	240	AV newpadlist, newpad;
167		241
168	newpadlist = newAV ();	242	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	243	AvREAL_off (newpadlist);
170	#if PERL_VERSION < 9	244	#if PERL_VERSION_ATLEAST (5,9,0)
		245	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		246	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	247	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
172	#else
173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174	#endif	248	#endif
175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	249	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176	--AvFILLp (padlist);	250	--AvFILLp (padlist);
177		251
178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	252	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
222		296
223	#define PERL_MAGIC_coro PERL_MAGIC_ext	297	#define PERL_MAGIC_coro PERL_MAGIC_ext
224		298
225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	299	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
226		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
227	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
228	static void	335	static void
229	get_padlist (pTHX_ CV *cv)	336	get_padlist (pTHX_ CV *cv)
230	{	337	{
231	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	338	MAGIC *mg = CORO_MAGIC (cv);
		339	AV *av;
232		340
233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	343	else
236	{	344	{
237	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this should work - but it doesn't :( */	346	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (aTHX_ cv);	347	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
243	#else	351	#else
244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
247	}	355	}
248		356
249	static void	357	static void
250	put_padlist (pTHX_ CV *cv)	358	put_padlist (pTHX_ CV *cv)
251	{	359	{
252	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	360	MAGIC *mg = CORO_MAGIC (cv);
		361	AV *av;
253		362
254	if (!mg)	363	if (!mg)
255	{	364	{
256	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	365	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
257	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	366	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
258	mg->mg_virtual = &vtbl_coro;	367	mg->mg_virtual = &vtbl_coro;
259	mg->mg_obj = (SV *)newAV ();	368	mg->mg_obj = (SV *)newAV ();
260	}	369	}
261		370
262	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	371	av = (AV *)mg->mg_obj;
263	}
264		372
265	#define SB do {	373	if (AvFILLp (av) >= AvMAX (av))
266	#define SE } while (0)	374	av_extend (av, AvMAX (av) + 1);
267		375
268	#define LOAD(state) load_state(aTHX_ (state));	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	377	}
270		378
271	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	379	/ load & save, init *****************************************************/
272		380
273	static void	381	static void
274	load_state(pTHX_ Coro__State c)	382	load_perl (pTHX_ Coro__State c)
275	{	383	{
276	PL_dowarn = c->dowarn;	384	#define VAR(name,type) PL_ ## name = c->name;
277	PL_in_eval = c->in_eval;	385	# include "state.h"
		386	#undef VAR
278		387
279	PL_curstackinfo = c->curstackinfo;	388	GvSV (PL_defgv) = c->defsv;
280	PL_curstack = c->curstack;	389	GvAV (PL_defgv) = c->defav;
281	PL_mainstack = c->mainstack;	390	GvSV (PL_errgv) = c->errsv;
282	PL_stack_sp = c->stack_sp;	391	PL_defoutgv = c->deffh;
283	PL_op = c->op;	392	PL_rs = c->irssv;
284	PL_curpad = c->curpad;	393	GvSV (irsgv) = c->irssv_sv;
285	PL_comppad = c->comppad;
286	PL_compcv = c->compcv;
287	PL_stack_base = c->stack_base;
288	PL_stack_max = c->stack_max;
289	PL_tmps_stack = c->tmps_stack;
290	PL_tmps_floor = c->tmps_floor;
291	PL_tmps_ix = c->tmps_ix;
292	PL_tmps_max = c->tmps_max;
293	PL_markstack = c->markstack;
294	PL_markstack_ptr = c->markstack_ptr;
295	PL_markstack_max = c->markstack_max;
296	PL_scopestack = c->scopestack;
297	PL_scopestack_ix = c->scopestack_ix;
298	PL_scopestack_max = c->scopestack_max;
299	PL_savestack = c->savestack;
300	PL_savestack_ix = c->savestack_ix;
301	PL_savestack_max = c->savestack_max;
302	#if PERL_VERSION < 9
303	PL_retstack = c->retstack;
304	PL_retstack_ix = c->retstack_ix;
305	PL_retstack_max = c->retstack_max;
306	#endif
307	PL_curpm = c->curpm;
308	PL_curcop = c->curcop;
309
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
313		394
314	{	395	{
315	dSP;	396	dSP;
316	CV *cv;	397	CV *cv;
317		398
318	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
320	{	401	{
321	AV padlist = (AV )POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	403	CvDEPTH (cv) = PTR2IV (POPs);
327	}	404	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	405	}
331		406
332	PUTBACK;	407	PUTBACK;
333	}	408	}
334	}	409	}
335		410
336	static void	411	static void
337	save_state(pTHX_ Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
338	{	413	{
339	{	414	{
340	dSP;	415	dSP;
341	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
345	/*	420	/*
346	* 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
347	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
348	*/	423	*/
349		424
350	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
352	for (;;)	427	for (;;)
353	{	428	{
354	while (cxix >= 0)	429	while (cxix >= 0)
355	{	430	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
357		432
358	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
359	{	434	{
360	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
		436
361	if (CvDEPTH(cv))	437	if (CvDEPTH (cv))
362	{	438	{
363	EXTEND (SP, CvDEPTH(cv)*2);	439	EXTEND (SP, 3);
364
365	while (--CvDEPTH(cv))
366	{
367	/* this tells the restore code to increment CvDEPTH */
368	PUSHs (Nullsv);
369	PUSHs ((SV *)cv);
370	}
371
372	PUSHs ((SV *)CvPADLIST(cv));	440	PUSHs ((SV *)CvPADLIST (cv));
		441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
374		443
		444	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	445	get_padlist (aTHX_ cv);
376	}	446	}
377	}	447	}
378	#ifdef CXt_FORMAT
379	else if (CxTYPE(cx) == CXt_FORMAT)
380	{
381	/* I never used formats, so how should I know how these are implemented? */
382	/* my bold guess is as a simple, plain sub... */
383	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384	}
385	#endif
386	}	448	}
387		449
388	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
389	break;	451	break;
390		452
391	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
392	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
393	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
394	}	456	}
395		457
396	PUTBACK;	458	PUTBACK;
397	}	459	}
398		460
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
400	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
401	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);
402		467
403	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	469	# include "state.h"
405		470	#undef VAR
406	c->curstackinfo = PL_curstackinfo;
407	c->curstack = PL_curstack;
408	c->mainstack = PL_mainstack;
409	c->stack_sp = PL_stack_sp;
410	c->op = PL_op;
411	c->curpad = PL_curpad;
412	c->comppad = PL_comppad;
413	c->compcv = PL_compcv;
414	c->stack_base = PL_stack_base;
415	c->stack_max = PL_stack_max;
416	c->tmps_stack = PL_tmps_stack;
417	c->tmps_floor = PL_tmps_floor;
418	c->tmps_ix = PL_tmps_ix;
419	c->tmps_max = PL_tmps_max;
420	c->markstack = PL_markstack;
421	c->markstack_ptr = PL_markstack_ptr;
422	c->markstack_max = PL_markstack_max;
423	c->scopestack = PL_scopestack;
424	c->scopestack_ix = PL_scopestack_ix;
425	c->scopestack_max = PL_scopestack_max;
426	c->savestack = PL_savestack;
427	c->savestack_ix = PL_savestack_ix;
428	c->savestack_max = PL_savestack_max;
429	#if PERL_VERSION < 9
430	c->retstack = PL_retstack;
431	c->retstack_ix = PL_retstack_ix;
432	c->retstack_max = PL_retstack_max;
433	#endif
434	c->curpm = PL_curpm;
435	c->curcop = PL_curcop;
436	}	471	}
437		472
438	/*	473	/*
439	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
443	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
444	static void	482	static void
445	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
446	{	484	{
447	LOCK;	485	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;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		489
454	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		493
458	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
459	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	497	PL_tmps_max = 64;
462		498
463	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
466		502
…		…
470		506
471	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
472	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
474		510
475	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	513	PL_savestack_max = 64;
478		514
479	#if PERL_VERSION < 9	515	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	518	PL_retstack_max = 4;
483	#endif	519	#endif
484
485	UNLOCK;
486	}	520	}
		521	#endif
487		522
488	/*	523	/*
489	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
490	*/	525	*/
491	static void	526	static void
492	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
493	{	528	{
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)	529	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
507		531
508	while (PL_curstackinfo)	532	while (PL_curstackinfo)
509	{	533	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
511		535
512	{ /D//remove/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/D//remove/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		538
524	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	541	PL_curstackinfo = p;
527	}	542	}
528		543
529	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	545	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	547	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	549	Safefree (PL_retstack);
535	#endif	550	#endif
536	}	551	}
537		552
538	static void	553	static size_t
539	setup_coro (struct coro *coro)	554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
		561	{
		562	#define VAR(name,type)coro->name = PL_ ## name;
		563	# include "state.h"
		564	#undef VAR
		565	}
		566
		567	rss += sizeof (coro->curstackinfo);
		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);
		575
		576	#if !PERL_VERSION_ATLEAST (5,9,0)
		577	rss += coro->retstack_max * sizeof (OP *);
		578	#endif
		579	}
		580
		581	return rss;
		582	}
		583
		584	/ coroutine stack handling **********************************************/
		585
		586	static void
		587	coro_setup (pTHX_ struct coro *coro)
540	{	588	{
541	/*	589	/*
542	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
543	*/	591	*/
544	dTHX;	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	{
545	dSP;	806	dSP;
546	UNOP myop;	807	LOGOP myop;
547	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
548		808
549	coro_init_stacks (aTHX);	809	PL_top_env = &PL_start_env;
550	/PL_curcop = 0;/
551	/PL_in_eval = PL_in_eval;/ /* inherit */
552	SvREFCNT_dec (GvAV (PL_defgv));
553	GvAV (PL_defgv) = coro->args; coro->args = 0;
554		810
555	SPAGAIN;	811	if (cctx->flags & CC_TRACE)
		812	PL_runops = runops_trace;
556		813
557	Zero (&myop, 1, UNOP);	814	Zero (&myop, 1, LOGOP);
558	myop.op_next = Nullop;	815	myop.op_next = PL_op;
559	myop.op_flags = OPf_WANT_VOID;	816	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
560		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;
561	PL_op = (OP *)&myop;	823	PL_op = (OP *)&myop;
562
563	PUSHMARK(SP);
564	XPUSHs (sub_init);
565	PUTBACK;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	824	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	825	SPAGAIN;
568
569	ENTER; /* necessary e.g. for dounwind */
570	}	826	}
571		827
572	static void	828	/*
573	free_coro_mortal ()	829	* this is a _very_ stripped down perl interpreter ;)
574	{	830	*/
575	if (coro_mortal)
576	{
577	SvREFCNT_dec (coro_mortal);
578	coro_mortal = 0;
579	}
580	}
581
582	static void	831	static void
583	coro_run (void *arg)	832	coro_run (void *arg)
584	{	833	{
		834	dTHX;
		835
		836	/* coro_run is the alternative tail of transfer(), so unlock here. */
		837	UNLOCK;
		838
		839	/* we now skip the entersub that lead to transfer() */
		840	PL_op = PL_op->op_next;
		841
		842	/* inject a fake subroutine call to cctx_init */
		843	prepare_cctx (aTHX_ (coro_cctx *)arg);
		844
		845	/* somebody or something will hit me for both perl_run and PL_restartop */
		846	PL_restartop = PL_op;
		847	perl_run (PL_curinterp);
		848
585	/*	849	/*
586	* this is a _very_ stripped down perl interpreter ;)	850	* If perl-run returns we assume exit() was being called or the coro
		851	* fell off the end, which seems to be the only valid (non-bug)
		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
587	*/	855	*/
588	dTHX;
589	PL_top_env = &PL_start_env;	856	PL_top_env = main_top_env;
590		857	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
591	UNLOCK;
592
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restart_op */
598	perl_run (aTHX_ PERL_GET_CONTEXT);
599
600	abort ();
601	}	858	}
602		859
603	static coro_stack *	860	static coro_cctx *
604	stack_new ()	861	cctx_new ()
605	{	862	{
606	coro_stack *stack;	863	coro_cctx *cctx;
		864	void *stack_start;
		865	size_t stack_size;
607		866
		867	++cctx_count;
		868
608	New (0, stack, 1, coro_stack);	869	Newz (0, cctx, 1, coro_cctx);
609		870
610	#if HAVE_MMAP	871	#if HAVE_MMAP
611		872
612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	873	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		874	/* mmap supposedly does allocate-on-write for us */
613	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	875	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
614		876
615	if (stack->sptr == (void *)-1)	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;
616	{	885	}
		886	else
		887	#endif
		888	{
		889	cctx->ssize = coro_stacksize * (long)sizeof (long);
		890	New (0, cctx->sptr, coro_stacksize, long);
		891
		892	if (!cctx->sptr)
		893	{
617	perror ("FATAL: unable to mmap stack for coroutine");	894	perror ("FATAL: unable to allocate stack for coroutine");
618	_exit (EXIT_FAILURE);	895	_exit (EXIT_FAILURE);
619	}	896	}
620		897
621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	898	stack_start = cctx->sptr;
622		899	stack_size = cctx->ssize;
623	#else
624
625	stack->ssize = STACKSIZE * (long)sizeof (long);
626	New (0, stack->sptr, STACKSIZE, long);
627
628	if (!stack->sptr)
629	{	900	}
630	perror (stderr, "FATAL: unable to malloc stack for coroutine");
631	_exit (EXIT_FAILURE);
632	}
633		901
634	#endif	902	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
635
636	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	903	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
637		904
638	return stack;	905	return cctx;
639	}	906	}
640		907
641	static void	908	static void
642	stack_free (coro_stack *stack)	909	cctx_destroy (coro_cctx *cctx)
643	{	910	{
644	if (!stack \|\| stack == main_stack)	911	if (!cctx)
645	return;	912	return;
646		913
		914	--cctx_count;
		915
		916	#if CORO_USE_VALGRIND
		917	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		918	#endif
		919
647	#if HAVE_MMAP	920	#if HAVE_MMAP
		921	if (cctx->flags & CC_MAPPED)
648	munmap (stack->sptr, stack->ssize);	922	munmap (cctx->sptr, cctx->ssize);
649	#else
650	Safefree (stack->sptr);
651	#endif
652
653	Safefree (stack);
654	}
655
656	static coro_stack *stack_first;
657
658	static coro_stack *
659	stack_get ()
660	{
661	coro_stack *stack;
662
663	if (stack_first)
664	{
665	stack = stack_first;
666	stack_first = stack->next;
667	}
668	else	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)
669	{	934	{
670	stack = stack_new ();	935	coro_cctx *cctx = cctx_first;
671	PL_op = PL_op->op_next;	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);
672	}	943	}
673		944
674	return stack;	945	return cctx_new ();
675	}	946	}
676		947
677	static void	948	static void
678	stack_put (coro_stack *stack)	949	cctx_put (coro_cctx *cctx)
679	{	950	{
680	stack->next = stack_first;	951	/* free another cctx if overlimit */
681	stack_first = stack;	952	if (cctx_idle >= MAX_IDLE_CCTX)
682	}	953	{
		954	coro_cctx *first = cctx_first;
		955	cctx_first = first->next;
		956	--cctx_idle;
683		957
684	/* never call directly, always through the coro_state_transfer global variable */	958	cctx_destroy (first);
685	static void	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
686	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	989	transfer (pTHX_ struct coro prev, struct coro next)
687	{	990	{
688	dSTACKLEVEL;	991	dSTACKLEVEL;
689		992
690	/* sometimes transfer is only called to set idle_sp */	993	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	994	if (!next)
		995	{
692	((coro_stack *)prev)->idle_sp = STACKLEVEL;	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	}
693	else if (prev != next)	999	else if (prev != next)
694	{	1000	{
695	coro_stack *prev__stack;	1001	coro_cctx *prev__cctx;
		1002
		1003	if (prev->flags & CF_NEW)
		1004	{
		1005	/* create a new empty context */
		1006	Newz (0, prev->cctx, 1, coro_cctx);
		1007	prev->flags &= ~CF_NEW;
		1008	prev->flags \|= CF_RUNNING;
		1009	}
		1010
		1011	prev->flags &= ~CF_RUNNING;
		1012	next->flags \|= CF_RUNNING;
696		1013
697	LOCK;	1014	LOCK;
698		1015
699	if (next->mainstack)	1016	if (next->flags & CF_NEW)
700	{	1017	{
701	/* coroutine already started */	1018	/* need to start coroutine */
702	SAVE (prev, flags);	1019	next->flags &= ~CF_NEW;
703	LOAD (next);	1020	/* first get rid of the old state */
		1021	save_perl (aTHX_ prev);
		1022	/* setup coroutine call */
		1023	coro_setup (aTHX_ next);
704	}	1024	}
705	else	1025	else
706	{	1026	{
707	/* need to start coroutine */	1027	/* coroutine already started */
708	/* first get rid of the old state */	1028	save_perl (aTHX_ prev);
709	SAVE (prev, -1);	1029	load_perl (aTHX_ next);
710	/* setup coroutine call */
711	setup_coro (next);
712	/* need a stack */
713	next->stack = 0;
714	}	1030	}
715		1031
716	prev__stack = prev->stack;	1032	prev__cctx = prev->cctx;
717		1033
718	/* possibly "free" the stack */	1034	/* possibly "free" the cctx */
719	if (prev__stack->idle_sp == STACKLEVEL)	1035	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
720	{	1036	{
721	stack_put (prev__stack);	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
722	prev->stack = 0;	1040	prev->cctx = 0;
		1041
		1042	cctx_put (prev__cctx);
723	}	1043	}
724		1044
		1045	++next->usecount;
		1046
725	if (!next->stack)	1047	if (!next->cctx)
726	next->stack = stack_get ();	1048	next->cctx = cctx_get (aTHX);
727		1049
728	if (prev__stack != next->stack)	1050	if (prev__cctx != next->cctx)
729	{	1051	{
730	prev__stack->top_env = PL_top_env;	1052	prev__cctx->top_env = PL_top_env;
731	PL_top_env = next->stack->top_env;	1053	PL_top_env = next->cctx->top_env;
732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1054	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
733	}	1055	}
734		1056
735	free_coro_mortal ();	1057	free_coro_mortal (aTHX);
736
737	UNLOCK;	1058	UNLOCK;
738	}	1059	}
739	}	1060	}
740		1061
741	/* use this function pointer to call the above function */
742	/* this is done to increase chances of the compiler not inlining the call */
743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
744	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
745
746	struct transfer_args	1062	struct transfer_args
747	{	1063	{
748	struct coro prev, next;	1064	struct coro prev, next;
749	int flags;
750	};	1065	};
751		1066
752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1067	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1068	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
753		1069
		1070	/ high level stuff ******************************************************/
		1071
754	static void	1072	static int
755	coro_state_destroy (struct coro *coro)	1073	coro_state_destroy (pTHX_ struct coro *coro)
756	{	1074	{
757	if (coro->refcnt--)	1075	if (coro->flags & CF_DESTROYED)
758	return;	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 */
759		1090
760	if (coro->mainstack && coro->mainstack != main_mainstack)	1091	if (coro->mainstack && coro->mainstack != main_mainstack)
761	{	1092	{
762	struct coro temp;	1093	struct coro temp;
763		1094
764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1095	if (coro->flags & CF_RUNNING)
		1096	croak ("FATAL: tried to destroy currently running coroutine");
		1097
		1098	save_perl (aTHX_ &temp);
765	LOAD (aTHX_ coro);	1099	load_perl (aTHX_ coro);
766		1100
767	destroy_stacks (aTHX);	1101	coro_destroy (aTHX_ coro);
768		1102
769	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1103	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
770		1104
771	coro->mainstack = 0;	1105	coro->mainstack = 0;
772	}	1106	}
773		1107
774	stack_free (coro->stack);	1108	cctx_destroy (coro->cctx);
775	SvREFCNT_dec (coro->args);	1109	SvREFCNT_dec (coro->args);
776	Safefree (coro);	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;
777	}	1116	}
778		1117
779	static int	1118	static int
780	coro_state_clear (SV sv, MAGIC mg)	1119	coro_state_free (pTHX_ SV sv, MAGIC mg)
781	{	1120	{
782	struct coro coro = (struct coro )mg->mg_ptr;	1121	struct coro coro = (struct coro )mg->mg_ptr;
783	mg->mg_ptr = 0;	1122	mg->mg_ptr = 0;
784		1123
		1124	coro->hv = 0;
		1125
		1126	if (--coro->refcnt < 0)
		1127	{
785	coro_state_destroy (coro);	1128	coro_state_destroy (aTHX_ coro);
		1129	Safefree (coro);
		1130	}
786		1131
787	return 0;	1132	return 0;
788	}	1133	}
789		1134
790	static int	1135	static int
791	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1136	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
792	{	1137	{
793	struct coro coro = (struct coro )mg->mg_ptr;	1138	struct coro coro = (struct coro )mg->mg_ptr;
794		1139
795	++coro->refcnt;	1140	++coro->refcnt;
796		1141
797	return 0;	1142	return 0;
798	}	1143	}
799		1144
800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	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	};
801		1155
802	static struct coro *
803	SvSTATE (SV *coro)
804	{
805	HV *stash;
806	MAGIC *mg;
807
808	if (SvROK (coro))
809	coro = SvRV (coro);
810
811	stash = SvSTASH (coro);
812	if (stash != coro_stash && stash != coro_state_stash)
813	{
814	/* very slow, but rare, check */
815	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
816	croak ("Coro::State object required");
817	}
818
819	mg = SvMAGIC (coro);
820	assert (mg->mg_type == PERL_MAGIC_ext);
821	return (struct coro *)mg->mg_ptr;
822	}
823
824	static void	1156	static void
825	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)	1157	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
826	{	1158	{
827	ta->prev = SvSTATE (prev);	1159	ta->prev = SvSTATE (prev_sv);
828	ta->next = SvSTATE (next);	1160	ta->next = SvSTATE (next_sv);
829	ta->flags = flags;	1161	TRANSFER_CHECK (*ta);
830	}	1162	}
831		1163
832	static void	1164	static void
833	api_transfer (SV prev, SV next, int flags)	1165	api_transfer (SV prev_sv, SV next_sv)
834	{	1166	{
835	dTHX;	1167	dTHX;
836	struct transfer_args ta;	1168	struct transfer_args ta;
837		1169
838	prepare_transfer (aTHX_ &ta, prev, next, flags);	1170	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
839	TRANSFER (ta);	1171	TRANSFER (ta);
840	}	1172	}
841		1173
842	/ Coro ******************************************************************/	1174	/ Coro ******************************************************************/
843		1175
844	#define PRIO_MAX 3
845	#define PRIO_HIGH 1
846	#define PRIO_NORMAL 0
847	#define PRIO_LOW -1
848	#define PRIO_IDLE -3
849	#define PRIO_MIN -4
850
851	/* for Coro.pm */
852	static GV coro_current, coro_idle;
853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
854	static int coro_nready;
855
856	static void	1176	static void
857	coro_enq (pTHX_ SV *sv)	1177	coro_enq (pTHX_ SV *coro_sv)
858	{	1178	{
859	int prio;
860
861	if (SvTYPE (sv) != SVt_PVHV)
862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
863
864	prio = SvSTATE (sv)->prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);	1179	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;
868	}	1180	}
869		1181
870	static SV *	1182	static SV *
871	coro_deq (pTHX_ int min_prio)	1183	coro_deq (pTHX_ int min_prio)
872	{	1184	{
…		…
876	if (min_prio < 0)	1188	if (min_prio < 0)
877	min_prio = 0;	1189	min_prio = 0;
878		1190
879	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1191	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
880	if (AvFILLp (coro_ready [prio]) >= 0)	1192	if (AvFILLp (coro_ready [prio]) >= 0)
881	{
882	coro_nready--;
883	return av_shift (coro_ready [prio]);	1193	return av_shift (coro_ready [prio]);
884	}
885		1194
886	return 0;	1195	return 0;
887	}	1196	}
888		1197
889	static void	1198	static int
890	api_ready (SV *coro)	1199	api_ready (SV *coro_sv)
891	{	1200	{
892	dTHX;	1201	dTHX;
		1202	struct coro *coro;
893		1203
894	if (SvROK (coro))	1204	if (SvROK (coro_sv))
895	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;
896		1213
897	LOCK;	1214	LOCK;
898	coro_enq (aTHX_ SvREFCNT_inc (coro));	1215	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1216	++coro_nready;
899	UNLOCK;	1217	UNLOCK;
900	}
901		1218
		1219	return 1;
		1220	}
		1221
902	static void	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
903	prepare_schedule (aTHX_ struct transfer_args *ta)	1230	prepare_schedule (pTHX_ struct transfer_args *ta)
904	{	1231	{
905	SV current, prev, *next;	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);
906		1280
907	LOCK;	1281	LOCK;
908
909	current = GvSV (coro_current);
910
911	for (;;)
912	{
913	LOCK;
914
915	next = coro_deq (aTHX_ PRIO_MIN);
916
917	if (next)
918	break;
919
920	UNLOCK;
921
922	{
923	dSP;
924
925	ENTER;
926	SAVETMPS;
927
928	PUSHMARK (SP);
929	PUTBACK;
930	call_sv (GvSV (coro_idle), G_DISCARD);
931
932	FREETMPS;
933	LEAVE;
934	}
935	}
936
937	prev = SvRV (current);
938	SvRV (current) = next;
939
940	/* free this only after the transfer */
941	free_coro_mortal ();	1282	free_coro_mortal (aTHX);
942	coro_mortal = prev;	1283	coro_mortal = prev_sv;
943
944	ta->prev = SvSTATE (prev);
945	ta->next = SvSTATE (next);
946	ta->flags = TRANSFER_SAVE_ALL;
947
948	UNLOCK;	1284	UNLOCK;
949	}	1285	}
950		1286
951	static void	1287	static void
952	prepare_cede (aTHX_ struct transfer_args *ta)	1288	prepare_cede (pTHX_ struct transfer_args *ta)
953	{	1289	{
954	LOCK;	1290	api_ready (coro_current);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957
958	prepare_schedule (ta);	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;
959	}	1306	}
960		1307
961	static void	1308	static void
962	api_schedule (void)	1309	api_schedule (void)
963	{	1310	{
964	dTHX;	1311	dTHX;
965	struct transfer_args ta;	1312	struct transfer_args ta;
966		1313
967	prepare_schedule (&ta);	1314	prepare_schedule (aTHX_ &ta);
968	TRANSFER (ta);	1315	TRANSFER (ta);
969	}	1316	}
970		1317
971	static void	1318	static int
972	api_cede (void)	1319	api_cede (void)
973	{	1320	{
974	dTHX;	1321	dTHX;
975	struct transfer_args ta;	1322	struct transfer_args ta;
976		1323
977	prepare_cede (&ta);	1324	prepare_cede (aTHX_ &ta);
		1325
		1326	if (ta.prev != ta.next)
		1327	{
978	TRANSFER (ta);	1328	TRANSFER (ta);
		1329	return 1;
		1330	}
		1331	else
		1332	return 0;
979	}	1333	}
980		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
981	MODULE = Coro::State PACKAGE = Coro::State	1376	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
982		1377
983	PROTOTYPES: DISABLE	1378	PROTOTYPES: DISABLE
984		1379
985	BOOT:	1380	BOOT:
986	{	1381	{
987	#ifdef USE_ITHREADS	1382	#ifdef USE_ITHREADS
988	MUTEX_INIT (&coro_mutex);	1383	MUTEX_INIT (&coro_mutex);
989	#endif	1384	#endif
990	BOOT_PAGESIZE;	1385	BOOT_PAGESIZE;
991		1386
		1387	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1388
992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1389	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993		1390
994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1394	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
997		1395
998	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;
999		1401
1000	coroapi.ver = CORO_API_VERSION;	1402	coroapi.ver = CORO_API_VERSION;
1001	coroapi.transfer = api_transfer;	1403	coroapi.transfer = api_transfer;
1002
1003	Newz (0, main_stack, 1, coro_stack);
1004	main_stack->idle_sp = (void *)-1;
1005		1404
1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1405	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1007	}	1406	}
1008		1407
1009	SV *	1408	SV *
…		…
1013	struct coro *coro;	1412	struct coro *coro;
1014	HV *hv;	1413	HV *hv;
1015	int i;	1414	int i;
1016		1415
1017	Newz (0, coro, 1, struct coro);	1416	Newz (0, coro, 1, struct coro);
1018	coro->args = newAV ();	1417	coro->args = newAV ();
		1418	coro->flags = CF_NEW;
1019		1419
		1420	if (coro_first) coro_first->prev = coro;
		1421	coro->next = coro_first;
		1422	coro_first = coro;
		1423
1020	hv = newHV ();	1424	coro->hv = hv = newHV ();
1021	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1425	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1426	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1023		1427
1024	for (i = 1; i < items; i++)	1428	for (i = 1; i < items; i++)
1025	av_push (coro->args, newSVsv (ST (i)));	1429	av_push (coro->args, newSVsv (ST (i)));
1026
1027	coro->stack = main_stack;
1028	/coro->mainstack = 0; //actual work is done inside transfer /
1029	/coro->stack = 0;/
1030	}	1430	}
1031	OUTPUT:	1431	OUTPUT:
1032	RETVAL	1432	RETVAL
1033		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
1034	void	1437	void
1035	transfer (...)	1438	_set_stacklevel (...)
1036	ALIAS:	1439	ALIAS:
1037	Coro::schedule = 1	1440	Coro::State::transfer = 1
1038	Coro::cede = 2	1441	Coro::schedule = 2
1039	_set_stacklevel = 3	1442	Coro::cede = 3
		1443	Coro::cede_notself = 4
1040	CODE:	1444	CODE:
1041	{	1445	{
1042	struct transfer_args ta;	1446	struct transfer_args ta;
1043		1447
1044	switch (ix)	1448	switch (ix)
1045	{	1449	{
1046	case 0:	1450	case 0:
1047	if (items != 3)	1451	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1452	ta.next = 0;
1049
1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051	break;	1453	break;
1052		1454
1053	case 1:	1455	case 1:
1054	prepare_schedule (&ta);	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));
1055	break;	1460	break;
1056		1461
1057	case 2:	1462	case 2:
1058	prepare_cede (&ta);	1463	prepare_schedule (aTHX_ &ta);
1059	break;	1464	break;
1060		1465
1061	case 3:	1466	case 3:
1062	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1467	prepare_cede (aTHX_ &ta);
1063	ta.next = 0;	1468	break;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;	1469
		1470	case 4:
		1471	if (!prepare_cede_notself (aTHX_ &ta))
		1472	XSRETURN_EMPTY;
		1473
1065	break;	1474	break;
1066	}	1475	}
1067		1476
		1477	BARRIER;
1068	TRANSFER (ta);	1478	TRANSFER (ta);
1069	}
1070		1479
1071	void	1480	if (GIMME_V != G_VOID && ta.next != ta.prev)
1072	_clone_state_from (SV dst, SV src)	1481	XSRETURN_YES;
		1482	}
		1483
		1484	bool
		1485	_destroy (SV *coro_sv)
1073	CODE:	1486	CODE:
1074	{	1487	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1075	struct coro *coro_src = SvSTATE (src);	1488	OUTPUT:
1076		1489	RETVAL
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1081	}
1082
1083	void
1084	_nonlocal_goto (IV nextop)
1085	CODE:
1086	/* uuh, somebody will kill me again for this */
1087	PL_op->op_next = INT2PTR (OP *, nextop);
1088		1490
1089	void	1491	void
1090	_exit (code)	1492	_exit (code)
1091	int code	1493	int code
1092	PROTOTYPE: $	1494	PROTOTYPE: $
1093	CODE:	1495	CODE:
1094	_exit (code);	1496	_exit (code);
1095		1497
1096	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
1097		1520
1098	void	1521	void
1099	yield (...)	1522	list ()
1100	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
1101	CODE:	1609	CODE:
1102	{	1610	switch (ix)
1103	SV *yieldstack;	1611	{
1104	SV *sv;	1612	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1105	AV *defav = GvAV (PL_defgv);	1613	case 1: RETVAL = coro->usecount; break;
1106	struct coro prev, next;
1107
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0	1614	}
1112	);	1615	OUTPUT:
		1616	RETVAL
1113		1617
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1122	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1123	SvREFCNT_dec (sv);
1124
1125	coro_state_transfer (aTHX_ prev, next, 0);
1126	}
1127		1618
1128	MODULE = Coro::State PACKAGE = Coro	1619	MODULE = Coro::State PACKAGE = Coro
1129		1620
1130	BOOT:	1621	BOOT:
1131	{	1622	{
1132	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);
1133		1631
1134	coro_stash = gv_stashpv ("Coro", TRUE);	1632	coro_stash = gv_stashpv ("Coro", TRUE);
1135		1633
1136	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1634	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1137	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1635	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1636	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1637	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1638	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1639	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1142		1640
1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1145
1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1641	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147	coro_ready[i] = newAV ();	1642	coro_ready[i] = newAV ();
1148		1643
1149	{	1644	{
1150	SV *sv = perl_get_sv("Coro::API", 1);	1645	SV *sv = perl_get_sv("Coro::API", 1);
1151		1646
1152	coroapi.schedule = api_schedule;	1647	coroapi.schedule = api_schedule;
1153	coroapi.cede = api_cede;	1648	coroapi.cede = api_cede;
		1649	coroapi.cede_notself = api_cede_notself;
1154	coroapi.ready = api_ready;	1650	coroapi.ready = api_ready;
		1651	coroapi.is_ready = api_is_ready;
1155	coroapi.nready = &coro_nready;	1652	coroapi.nready = &coro_nready;
1156	coroapi.current = coro_current;	1653	coroapi.current = coro_current;
1157		1654
1158	GCoroAPI = &coroapi;	1655	GCoroAPI = &coroapi;
1159	sv_setiv (sv, (IV)&coroapi);	1656	sv_setiv (sv, (IV)&coroapi);
1160	SvREADONLY_on (sv);	1657	SvREADONLY_on (sv);
1161	}	1658	}
1162	}	1659	}
		1660
		1661	void
		1662	_set_current (SV *current)
		1663	PROTOTYPE: $
		1664	CODE:
		1665	SvREFCNT_dec (SvRV (coro_current));
		1666	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1163		1667
1164	int	1668	int
1165	prio (Coro::State coro, int newprio = 0)	1669	prio (Coro::State coro, int newprio = 0)
1166	ALIAS:	1670	ALIAS:
1167	nice = 1	1671	nice = 1
…		…
1170	RETVAL = coro->prio;	1674	RETVAL = coro->prio;
1171		1675
1172	if (items > 1)	1676	if (items > 1)
1173	{	1677	{
1174	if (ix)	1678	if (ix)
1175	newprio += coro->prio;	1679	newprio = coro->prio - newprio;
1176		1680
1177	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1681	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1178	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1682	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1179		1683
1180	coro->prio = newprio;	1684	coro->prio = newprio;
1181	}	1685	}
1182	}	1686	}
		1687	OUTPUT:
		1688	RETVAL
1183		1689
1184	void	1690	SV *
1185	ready (SV *self)	1691	ready (SV *self)
1186	PROTOTYPE: $	1692	PROTOTYPE: $
1187	CODE:	1693	CODE:
1188	api_ready (self);	1694	RETVAL = boolSV (api_ready (self));
		1695	OUTPUT:
		1696	RETVAL
1189		1697
1190	int	1698	int
1191	nready (...)	1699	nready (...)
1192	PROTOTYPE:	1700	PROTOTYPE:
1193	CODE:	1701	CODE:
1194	RETVAL = coro_nready;	1702	RETVAL = coro_nready;
1195	OUTPUT:	1703	OUTPUT:
1196	RETVAL	1704	RETVAL
1197		1705
		1706	# for async_pool speedup
		1707	void
		1708	_pool_1 (SV *cb)
		1709	CODE:
		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	}
		1737
		1738	void
		1739	_pool_2 (SV *cb)
		1740	CODE:
		1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
		1743
		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
1198	MODULE = Coro::State PACKAGE = Coro::AIO	1763	MODULE = Coro::State PACKAGE = Coro::AIO
1199		1764
1200	SV *	1765	SV *
1201	_get_state ()	1766	_get_state ()
1202	CODE:	1767	CODE:
1203	{	1768	{
1204	struct {	1769	struct io_state *data;
1205	int errorno;
1206	int laststype;
1207	int laststatval;
1208	Stat_t statcache;
1209	} data;
1210		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
1211	data.errorno = errno;	1776	data->errorno = errno;
1212	data.laststype = PL_laststype;	1777	data->laststype = PL_laststype;
1213	data.laststatval = PL_laststatval;	1778	data->laststatval = PL_laststatval;
1214	data.statcache = PL_statcache;	1779	data->statcache = PL_statcache;
1215
1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
1217	}	1780	}
1218	OUTPUT:	1781	OUTPUT:
1219	RETVAL	1782	RETVAL
1220		1783
1221	void	1784	void
1222	_set_state (char *data_)	1785	_set_state (char *data_)
1223	PROTOTYPE: $	1786	PROTOTYPE: $
1224	CODE:	1787	CODE:
1225	{	1788	{
1226	struct {	1789	struct io_state data = (void )data_;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} data = (void )data_;
1232		1790
1233	errno = data->errorno;	1791	errno = data->errorno;
1234	PL_laststype = data->laststype;	1792	PL_laststype = data->laststype;
1235	PL_laststatval = data->laststatval;	1793	PL_laststatval = data->laststatval;
1236	PL_statcache = data->statcache;	1794	PL_statcache = data->statcache;
1237	}	1795	}
		1796

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Comparing Coro/Coro/State.xs (file contents): Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs. Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC