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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.96 by root, Sun Nov 26 18:25:11 2006 UTC vs.
Revision 1.197 by root, Sat Oct 6 19:25:00 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
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
34		87
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	89	# 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	90	#endif
53	# include <limits.h>	91
54	# ifndef PAGESIZE	92	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	93	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	94	#endif
61	#endif
62		95
63	/* The next macro should declare a variable stacklevel that contains and approximation	96	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	97	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
68		105
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		107
		108	#if __GNUC__ >= 3
		109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	# define expect(expr,value) __builtin_expect ((expr),(value))
		112	#else
		113	# define attribute(x)
		114	# define BARRIER
		115	# define expect(expr,value) (expr)
		116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
		120
		121	#define NOINLINE attribute ((noinline))
		122
71	#include "CoroAPI.h"	123	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		124
75	#ifdef USE_ITHREADS	125	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	126	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	127	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	128	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	129	#else
80	# define LOCK (void)0	130	# define LOCK (void)0
81	# define UNLOCK (void)0	131	# define UNLOCK (void)0
82	#endif	132	#endif
83		133
		134	/* helper storage struct for Coro::AIO */
		135	struct io_state
		136	{
		137	int errorno;
		138	I32 laststype;
		139	int laststatval;
		140	Stat_t statcache;
		141	};
		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	144	static struct CoroAPI coroapi;
85	static AV main_mainstack; / used to differentiate between $main and others */	145	static AV main_mainstack; / used to differentiate between $main and others */
		146	static JMPENV *main_top_env;
86	static HV coro_state_stash, coro_stash;	147	static HV coro_state_stash, coro_stash;
87	static SV coro_mortal; / will be freed after next transfer */	148	static SV coro_mortal; / will be freed after next transfer */
88		149
		150	static GV irsgv; / $/ */
		151	static GV stdoutgv; / STDOUT /
		152
		153	/* async_pool helper stuff */
		154	static SV *sv_pool_rss;
		155	static SV *sv_pool_size;
		156	static AV *av_async_pool;
		157
		158	static struct coro_cctx *cctx_first;
		159	static int cctx_count, cctx_idle;
		160
		161	enum {
		162	CC_MAPPED = 0x01,
		163	CC_NOREUSE = 0x02, /* throw this away after tracing */
		164	CC_TRACE = 0x04,
		165	CC_TRACE_SUB = 0x08, /* trace sub calls */
		166	CC_TRACE_LINE = 0x10, /* trace each statement */
		167	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		168	};
		169
89	/* this is a structure representing a c-level coroutine */	170	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	171	typedef struct coro_cctx {
91	struct coro_stack *next;	172	struct coro_cctx *next;
92		173
93	/* the stack */	174	/* the stack */
94	void *sptr;	175	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	176	size_t ssize;
96		177
97	/* cpu state */	178	/* cpu state */
98	void idle_sp; / sp of top-level transfer/schedule/cede call */	179	void idle_sp; / sp of top-level transfer/schedule/cede call */
		180	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	181	JMPENV *top_env;
100	coro_context cctx;	182	coro_context cctx;
101	} coro_stack;	183
		184	#if CORO_USE_VALGRIND
		185	int valgrind_id;
		186	#endif
		187	unsigned char flags;
		188	} coro_cctx;
		189
		190	enum {
		191	CF_RUNNING = 0x0001, /* coroutine is running */
		192	CF_READY = 0x0002, /* coroutine is ready */
		193	CF_NEW = 0x0004, /* has never been switched to */
		194	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		195	};
102		196
103	/* this is a structure representing a perl-level coroutine */	197	/* this is a structure representing a perl-level coroutine */
104	struct coro {	198	struct coro {
105	/* the c coroutine allocated to this perl coroutine, if any */	199	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	200	coro_cctx *cctx;
107		201
108	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
109	AV *args;	203	AV *args;
110	int refcnt;	204	int refcnt;
		205	int flags; /* CF_ flags */
111		206
112	/* optionally saved, might be zero */	207	/* optionally saved, might be zero */
113	AV *defav;	208	AV defav; / @_ */
114	SV *defsv;	209	SV defsv; / $_ */
115	SV *errsv;	210	SV errsv; / $@ */
		211	SV deffh; / default filehandle */
		212	SV irssv; / $/ */
		213	SV irssv_sv; / real $/ cache */
116		214
117	/* saved global state not related to stacks */	215	#define VAR(name,type) type name;
118	U8 dowarn;	216	# include "state.h"
119	I32 in_eval;	217	#undef VAR
120		218
121	/* the stacks and related info (callchain etc..) */	219	/* statistics */
122	PERL_SI *curstackinfo;	220	int usecount; /* number of transfers to this coro */
123	AV *curstack;
124	AV *mainstack;
125	SV **stack_sp;
126	OP *op;
127	SV **curpad;
128	AV *comppad;
129	CV *compcv;
130	SV **stack_base;
131	SV **stack_max;
132	SV **tmps_stack;
133	I32 tmps_floor;
134	I32 tmps_ix;
135	I32 tmps_max;
136	I32 *markstack;
137	I32 *markstack_ptr;
138	I32 *markstack_max;
139	I32 *scopestack;
140	I32 scopestack_ix;
141	I32 scopestack_max;
142	ANY *savestack;
143	I32 savestack_ix;
144	I32 savestack_max;
145	OP **retstack;
146	I32 retstack_ix;
147	I32 retstack_max;
148	PMOP *curpm;
149	COP *curcop;
150		221
151	/* coro process data */	222	/* coro process data */
152	int prio;	223	int prio;
		224	SV *throw;
		225
		226	/* async_pool */
		227	SV *saved_deffh;
		228
		229	/* linked list */
		230	struct coro next, prev;
		231	HV hv; / the perl hash associated with this coro, if any */
153	};	232	};
154		233
155	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
157		236
		237	/ Coro ******************************************************************/
		238
		239	#define PRIO_MAX 3
		240	#define PRIO_HIGH 1
		241	#define PRIO_NORMAL 0
		242	#define PRIO_LOW -1
		243	#define PRIO_IDLE -3
		244	#define PRIO_MIN -4
		245
		246	/* for Coro.pm */
		247	static SV *coro_current;
		248	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		249	static int coro_nready;
		250	static struct coro *coro_first;
		251
		252	/ lowlevel stuff ********************************************************/
		253
158	static AV *	254	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	255	coro_clone_padlist (pTHX_ CV *cv)
160	{	256	{
161	AV *padlist = CvPADLIST (cv);	257	AV *padlist = CvPADLIST (cv);
162	AV newpadlist, newpad;	258	AV newpadlist, newpad;
163		259
164	newpadlist = newAV ();	260	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	261	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	262	#if PERL_VERSION_ATLEAST (5,9,0)
		263	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		264	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	265	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	266	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	267	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	268	--AvFILLp (padlist);
173		269
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	270	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		314
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	315	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		316
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	317	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		318
		319	#define CORO_MAGIC(cv) \
		320	SvMAGIC (cv) \
		321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		322	? SvMAGIC (cv) \
		323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		324	: 0
		325
		326	static struct coro *
		327	SvSTATE_ (pTHX_ SV *coro)
		328	{
		329	HV *stash;
		330	MAGIC *mg;
		331
		332	if (SvROK (coro))
		333	coro = SvRV (coro);
		334
		335	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		336	croak ("Coro::State object required");
		337
		338	stash = SvSTASH (coro);
		339	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		340	{
		341	/* very slow, but rare, check */
		342	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		343	croak ("Coro::State object required");
		344	}
		345
		346	mg = CORO_MAGIC (coro);
		347	return (struct coro *)mg->mg_ptr;
		348	}
		349
		350	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		351
223	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
224	static void	353	static void
225	get_padlist (pTHX_ CV *cv)	354	get_padlist (pTHX_ CV *cv)
226	{	355	{
227	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	356	MAGIC *mg = CORO_MAGIC (cv);
		357	AV *av;
228		358
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	361	else
232	{	362	{
233	#if 0	363	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this is probably cleaner, but also slower? */	364	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	365	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	366	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	367	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	368	SvREFCNT_dec (cp);
239	#else	369	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	373	}
244		374
245	static void	375	static void
246	put_padlist (pTHX_ CV *cv)	376	put_padlist (pTHX_ CV *cv)
247	{	377	{
248	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	378	MAGIC *mg = CORO_MAGIC (cv);
		379	AV *av;
249		380
250	if (!mg)	381	if (expect_false (!mg))
251	{	382	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	385	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	386	mg->mg_obj = (SV *)newAV ();
256	}	387	}
257		388
258	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	389	av = (AV *)mg->mg_obj;
259	}
260		390
261	#define SB do {	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	392	av_extend (av, AvMAX (av) + 1);
263		393
264	#define LOAD(state) load_state(aTHX_ (state));	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	395	}
266		396
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	397	/ load & save, init *****************************************************/
268		398
269	static void	399	static void
270	load_state(pTHX_ Coro__State c)	400	load_perl (pTHX_ Coro__State c)
271	{	401	{
272	PL_dowarn = c->dowarn;	402	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	403	# include "state.h"
		404	#undef VAR
274		405
275	PL_curstackinfo = c->curstackinfo;	406	GvSV (PL_defgv) = c->defsv;
276	PL_curstack = c->curstack;	407	GvAV (PL_defgv) = c->defav;
277	PL_mainstack = c->mainstack;	408	GvSV (PL_errgv) = c->errsv;
278	PL_stack_sp = c->stack_sp;	409	GvSV (irsgv) = c->irssv_sv;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305
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		410
310	{	411	{
311	dSP;	412	dSP;
312	CV *cv;	413	CV *cv;
313		414
314	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
316	{	417	{
317	AV padlist = (AV )POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	419	CvDEPTH (cv) = PTR2IV (POPs);
323	}	420	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	421	}
327		422
328	PUTBACK;	423	PUTBACK;
329	}	424	}
330	}	425	}
331		426
332	static void	427	static void
333	save_state(pTHX_ Coro__State c, int flags)	428	save_perl (pTHX_ Coro__State c)
334	{	429	{
335	{	430	{
336	dSP;	431	dSP;
337	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	436	/*
342	* the worst thing you can imagine happens first - we have to save	437	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
344	*/	439	*/
345		440
346	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
348	for (;;)	443	for (;;)
349	{	444	{
350	while (cxix >= 0)	445	while (expect_true (cxix >= 0))
351	{	446	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
353		448
354	if (CxTYPE(cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
355	{	450	{
356	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
		452
357	if (CvDEPTH(cv))	453	if (expect_true (CvDEPTH (cv)))
358	{	454	{
359	EXTEND (SP, CvDEPTH(cv)*2);	455	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));	456	PUSHs ((SV *)CvPADLIST (cv));
		457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
370		459
		460	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	461	get_padlist (aTHX_ cv);
372	}	462	}
373	}	463	}
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	}	464	}
383		465
384	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
385	break;	467	break;
386		468
387	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
390	}	472	}
391		473
392	PUTBACK;	474	PUTBACK;
393	}	475	}
394		476
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
		480	c->irssv_sv = GvSV (irsgv);
398		481
399	c->dowarn = PL_dowarn;	482	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	483	# include "state.h"
401		484	#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	}	485	}
433		486
434	/*	487	/*
435	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	490	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	491	* not usually need a lot of stackspace.
439	*/	492	*/
		493	#if CORO_PREFER_PERL_FUNCTIONS
		494	# define coro_init_stacks init_stacks
		495	#else
440	static void	496	static void
441	coro_init_stacks (pTHX)	497	coro_init_stacks (pTHX)
442	{	498	{
443	LOCK;	499	PL_curstackinfo = new_stackinfo(64, 6);
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		503
450	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		507
454	New(50,PL_tmps_stack,96,SV*);	508	New(50,PL_tmps_stack,64,SV*);
455	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	511	PL_tmps_max = 64;
458		512
459	New(54,PL_markstack,16,I32);	513	New(54,PL_markstack,16,I32);
460	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	515	PL_markstack_max = PL_markstack + 16;
462		516
…		…
466		520
467	New(54,PL_scopestack,16,I32);	521	New(54,PL_scopestack,16,I32);
468	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	523	PL_scopestack_max = 16;
470		524
471	New(54,PL_savestack,96,ANY);	525	New(54,PL_savestack,64,ANY);
472	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	527	PL_savestack_max = 64;
474		528
475	#if PERL_VERSION < 9	529	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	530	New(54,PL_retstack,4,OP*);
477	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	532	PL_retstack_max = 4;
479	#endif	533	#endif
480
481	UNLOCK;
482	}	534	}
		535	#endif
483		536
484	/*	537	/*
485	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
486	*/	539	*/
487	static void	540	static void
488	destroy_stacks(pTHX)	541	coro_destroy_stacks (pTHX)
489	{	542	{
490	if (!IN_DESTRUCT)
491	{
492	/* is this ugly, I ask? */
493	LEAVE_SCOPE (0);
494
495	/* sure it is, but more important: is it correct?? :/ */
496	FREETMPS;
497
498	/POPSTACK_TO (PL_mainstack);//D//use/
499	}
500
501	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
503		545
504	while (PL_curstackinfo)	546	while (PL_curstackinfo)
505	{	547	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	548	PERL_SI *p = PL_curstackinfo->si_prev;
507		549
508	{ /D//remove/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	550	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/D//remove/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	551	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		552
520	Safefree (PL_curstackinfo->si_cxstack);	553	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	554	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	555	PL_curstackinfo = p;
523	}	556	}
524		557
525	Safefree (PL_tmps_stack);	558	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	559	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	560	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	561	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	562	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	563	Safefree (PL_retstack);
531	#endif	564	#endif
532	}	565	}
533		566
534	static void	567	static size_t
535	setup_coro (struct coro *coro)	568	coro_rss (pTHX_ struct coro *coro)
		569	{
		570	size_t rss = sizeof (*coro);
		571
		572	if (coro->mainstack)
		573	{
		574	if (coro->flags & CF_RUNNING)
		575	{
		576	#define VAR(name,type)coro->name = PL_ ## name;
		577	# include "state.h"
		578	#undef VAR
		579	}
		580
		581	rss += sizeof (coro->curstackinfo);
		582	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		583	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		584	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		585	rss += coro->tmps_max * sizeof (SV *);
		586	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		587	rss += coro->scopestack_max * sizeof (I32);
		588	rss += coro->savestack_max * sizeof (ANY);
		589
		590	#if !PERL_VERSION_ATLEAST (5,9,0)
		591	rss += coro->retstack_max * sizeof (OP *);
		592	#endif
		593	}
		594
		595	return rss;
		596	}
		597
		598	/ coroutine stack handling **********************************************/
		599
		600	static void
		601	coro_setup (pTHX_ struct coro *coro)
536	{	602	{
537	/*	603	/*
538	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
539	*/	605	*/
540	dTHX;	606	coro_init_stacks (aTHX);
		607
		608	PL_runops = RUNOPS_DEFAULT;
		609	PL_curcop = &PL_compiling;
		610	PL_in_eval = EVAL_NULL;
		611	PL_comppad = 0;
		612	PL_curpm = 0;
		613	PL_curpad = 0;
		614	PL_localizing = 0;
		615	PL_dirty = 0;
		616	PL_restartop = 0;
		617
		618	GvSV (PL_defgv) = newSV (0);
		619	GvAV (PL_defgv) = coro->args; coro->args = 0;
		620	GvSV (PL_errgv) = newSV (0);
		621	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		622	PL_rs = newSVsv (GvSV (irsgv));
		623	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		624
		625	{
		626	dSP;
		627	LOGOP myop;
		628
		629	Zero (&myop, 1, LOGOP);
		630	myop.op_next = Nullop;
		631	myop.op_flags = OPf_WANT_VOID;
		632
		633	PUSHMARK (SP);
		634	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		635	PUTBACK;
		636	PL_op = (OP *)&myop;
		637	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		638	SPAGAIN;
		639	}
		640
		641	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		642	}
		643
		644	static void
		645	coro_destroy (pTHX_ struct coro *coro)
		646	{
		647	if (!IN_DESTRUCT)
		648	{
		649	/* restore all saved variables and stuff */
		650	LEAVE_SCOPE (0);
		651	assert (PL_tmps_floor == -1);
		652
		653	/* free all temporaries */
		654	FREETMPS;
		655	assert (PL_tmps_ix == -1);
		656
		657	/* unwind all extra stacks */
		658	POPSTACK_TO (PL_mainstack);
		659
		660	/* unwind main stack */
		661	dounwind (-1);
		662	}
		663
		664	SvREFCNT_dec (GvSV (PL_defgv));
		665	SvREFCNT_dec (GvAV (PL_defgv));
		666	SvREFCNT_dec (GvSV (PL_errgv));
		667	SvREFCNT_dec (PL_defoutgv);
		668	SvREFCNT_dec (PL_rs);
		669	SvREFCNT_dec (GvSV (irsgv));
		670
		671	SvREFCNT_dec (coro->saved_deffh);
		672	SvREFCNT_dec (coro->throw);
		673
		674	coro_destroy_stacks (aTHX);
		675	}
		676
		677	static void
		678	free_coro_mortal (pTHX)
		679	{
		680	if (expect_true (coro_mortal))
		681	{
		682	SvREFCNT_dec (coro_mortal);
		683	coro_mortal = 0;
		684	}
		685	}
		686
		687	static int
		688	runops_trace (pTHX)
		689	{
		690	COP *oldcop = 0;
		691	int oldcxix = -2;
		692	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		693	coro_cctx *cctx = coro->cctx;
		694
		695	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		696	{
		697	PERL_ASYNC_CHECK ();
		698
		699	if (cctx->flags & CC_TRACE_ALL)
		700	{
		701	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		702	{
		703	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		704	SV bot, top;
		705	AV av = newAV (); / return values */
		706	SV **cb;
		707	dSP;
		708
		709	GV *gv = CvGV (cx->blk_sub.cv);
		710	SV *fullname = sv_2mortal (newSV (0));
		711	if (isGV (gv))
		712	gv_efullname3 (fullname, gv, 0);
		713
		714	bot = PL_stack_base + cx->blk_oldsp + 1;
		715	top = cx->blk_gimme == G_ARRAY ? SP + 1
		716	: cx->blk_gimme == G_SCALAR ? bot + 1
		717	: bot;
		718
		719	av_extend (av, top - bot);
		720	while (bot < top)
		721	av_push (av, SvREFCNT_inc (*bot++));
		722
		723	PL_runops = RUNOPS_DEFAULT;
		724	ENTER;
		725	SAVETMPS;
		726	EXTEND (SP, 3);
		727	PUSHMARK (SP);
		728	PUSHs (&PL_sv_no);
		729	PUSHs (fullname);
		730	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		731	PUTBACK;
		732	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		733	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		734	SPAGAIN;
		735	FREETMPS;
		736	LEAVE;
		737	PL_runops = runops_trace;
		738	}
		739
		740	if (oldcop != PL_curcop)
		741	{
		742	oldcop = PL_curcop;
		743
		744	if (PL_curcop != &PL_compiling)
		745	{
		746	SV **cb;
		747
		748	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		749	{
		750	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		751
		752	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		753	{
		754	runops_proc_t old_runops = PL_runops;
		755	dSP;
		756	GV *gv = CvGV (cx->blk_sub.cv);
		757	SV *fullname = sv_2mortal (newSV (0));
		758
		759	if (isGV (gv))
		760	gv_efullname3 (fullname, gv, 0);
		761
		762	PL_runops = RUNOPS_DEFAULT;
		763	ENTER;
		764	SAVETMPS;
		765	EXTEND (SP, 3);
		766	PUSHMARK (SP);
		767	PUSHs (&PL_sv_yes);
		768	PUSHs (fullname);
		769	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		770	PUTBACK;
		771	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		772	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		773	SPAGAIN;
		774	FREETMPS;
		775	LEAVE;
		776	PL_runops = runops_trace;
		777	}
		778
		779	oldcxix = cxstack_ix;
		780	}
		781
		782	if (cctx->flags & CC_TRACE_LINE)
		783	{
		784	dSP;
		785
		786	PL_runops = RUNOPS_DEFAULT;
		787	ENTER;
		788	SAVETMPS;
		789	EXTEND (SP, 3);
		790	PL_runops = RUNOPS_DEFAULT;
		791	PUSHMARK (SP);
		792	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		793	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		794	PUTBACK;
		795	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		796	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		797	SPAGAIN;
		798	FREETMPS;
		799	LEAVE;
		800	PL_runops = runops_trace;
		801	}
		802	}
		803	}
		804	}
		805	}
		806
		807	TAINT_NOT;
		808	return 0;
		809	}
		810
		811	/* inject a fake call to Coro::State::_cctx_init into the execution */
		812	/* _cctx_init should be careful, as it could be called at almost any time */
		813	/* during execution of a perl program */
		814	static void NOINLINE
		815	prepare_cctx (pTHX_ coro_cctx *cctx)
		816	{
541	dSP;	817	dSP;
542	UNOP myop;	818	LOGOP myop;
543	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
544		819
545	coro_init_stacks (aTHX);	820	PL_top_env = &PL_start_env;
546	/PL_curcop = 0;/
547	/PL_in_eval = PL_in_eval;/ /* inherit */
548	SvREFCNT_dec (GvAV (PL_defgv));
549	GvAV (PL_defgv) = coro->args; coro->args = 0;
550		821
551	SPAGAIN;	822	if (cctx->flags & CC_TRACE)
		823	PL_runops = runops_trace;
552		824
553	Zero (&myop, 1, UNOP);	825	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	826	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	827	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
556		828
		829	PUSHMARK (SP);
		830	EXTEND (SP, 2);
		831	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		832	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		833	PUTBACK;
557	PL_op = (OP *)&myop;	834	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	835	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	836	SPAGAIN;
564
565	ENTER; /* necessary e.g. for dounwind */
566	}	837	}
567		838
568	static void	839	/*
569	free_coro_mortal ()	840	* this is a _very_ stripped down perl interpreter ;)
570	{	841	*/
571	if (coro_mortal)
572	{
573	SvREFCNT_dec (coro_mortal);
574	coro_mortal = 0;
575	}
576	}
577
578	static void	842	static void
579	coro_run (void *arg)	843	coro_run (void *arg)
580	{	844	{
		845	dTHX;
		846
		847	/* coro_run is the alternative tail of transfer(), so unlock here. */
		848	UNLOCK;
		849
		850	/* we now skip the entersub that lead to transfer() */
		851	PL_op = PL_op->op_next;
		852
		853	/* inject a fake subroutine call to cctx_init */
		854	prepare_cctx (aTHX_ (coro_cctx *)arg);
		855
		856	/* somebody or something will hit me for both perl_run and PL_restartop */
		857	PL_restartop = PL_op;
		858	perl_run (PL_curinterp);
		859
581	/*	860	/*
582	* this is a _very_ stripped down perl interpreter ;)	861	* If perl-run returns we assume exit() was being called or the coro
		862	* fell off the end, which seems to be the only valid (non-bug)
		863	* reason for perl_run to return. We try to exit by jumping to the
		864	* bootstrap-time "top" top_env, as we cannot restore the "main"
		865	* coroutine as Coro has no such concept
583	*/	866	*/
584	dTHX;
585	int ret;
586
587	UNLOCK;
588
589	PL_top_env = &PL_start_env;	867	PL_top_env = main_top_env;
590		868	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
591	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
592	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
593
594	/* continue at cctx_init, without entersub */
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restartop */
598	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
599	printf ("ret %d\n", ret);//D
600
601	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
602	abort ();
603	}	869	}
604		870
605	static coro_stack *	871	static coro_cctx *
606	stack_new ()	872	cctx_new ()
607	{	873	{
608	coro_stack *stack;	874	coro_cctx *cctx;
		875	void *stack_start;
		876	size_t stack_size;
609		877
		878	++cctx_count;
		879
610	New (0, stack, 1, coro_stack);	880	Newz (0, cctx, 1, coro_cctx);
611		881
612	#if HAVE_MMAP	882	#if HAVE_MMAP
613		883
614	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	884	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
615	/* mmap suppsedly does allocate-on-write for us */	885	/* mmap supposedly does allocate-on-write for us */
616	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	886	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
617		887
618	if (stack->sptr == (void *)-1)	888	if (cctx->sptr != (void *)-1)
619	{
620	perror ("FATAL: unable to mmap stack for coroutine");
621	_exit (EXIT_FAILURE);
622	}	889	{
623
624	# if STACKGUARD	890	# if CORO_STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	891	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
626	# endif	892	# endif
627		893	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
628	#else	894	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
629		895	cctx->flags \|= CC_MAPPED;
630	stack->ssize = STACKSIZE * (long)sizeof (long);
631	New (0, stack->sptr, STACKSIZE, long);
632
633	if (!stack->sptr)
634	{	896	}
		897	else
		898	#endif
		899	{
		900	cctx->ssize = coro_stacksize * (long)sizeof (long);
		901	New (0, cctx->sptr, coro_stacksize, long);
		902
		903	if (!cctx->sptr)
		904	{
635	perror (stderr, "FATAL: unable to malloc stack for coroutine");	905	perror ("FATAL: unable to allocate stack for coroutine");
636	_exit (EXIT_FAILURE);	906	_exit (EXIT_FAILURE);
637	}	907	}
638		908
639	#endif	909	stack_start = cctx->sptr;
		910	stack_size = cctx->ssize;
		911	}
640		912
		913	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
641	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	914	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
642		915
643	return stack;	916	return cctx;
644	}	917	}
645		918
646	static void	919	static void
647	stack_free (coro_stack *stack)	920	cctx_destroy (coro_cctx *cctx)
648	{	921	{
649	if (!stack)	922	if (!cctx)
650	return;	923	return;
651		924
		925	--cctx_count;
		926
		927	#if CORO_USE_VALGRIND
		928	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		929	#endif
		930
652	#if HAVE_MMAP	931	#if HAVE_MMAP
		932	if (cctx->flags & CC_MAPPED)
653	munmap (stack->sptr, stack->ssize);	933	munmap (cctx->sptr, cctx->ssize);
654	#else
655	Safefree (stack->sptr);
656	#endif
657
658	Safefree (stack);
659	}
660
661	static coro_stack *stack_first;
662
663	static coro_stack *
664	stack_get ()
665	{
666	coro_stack *stack;
667
668	if (stack_first)
669	{
670	stack = stack_first;
671	stack_first = stack->next;
672	}
673	else	934	else
		935	#endif
		936	Safefree (cctx->sptr);
		937
		938	Safefree (cctx);
		939	}
		940
		941	/* wether this cctx should be destructed */
		942	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		943
		944	static coro_cctx *
		945	cctx_get (pTHX)
		946	{
		947	while (expect_true (cctx_first))
674	{	948	{
675	stack = stack_new ();	949	coro_cctx *cctx = cctx_first;
676	PL_op = PL_op->op_next;	950	cctx_first = cctx->next;
		951	--cctx_idle;
		952
		953	if (expect_true (!CCTX_EXPIRED (cctx)))
		954	return cctx;
		955
		956	cctx_destroy (cctx);
677	}	957	}
678		958
679	return stack;	959	return cctx_new ();
680	}	960	}
681		961
682	static void	962	static void
683	stack_put (coro_stack *stack)	963	cctx_put (coro_cctx *cctx)
684	{	964	{
685	stack->next = stack_first;	965	/* free another cctx if overlimit */
686	stack_first = stack;	966	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
687	}	967	{
		968	coro_cctx *first = cctx_first;
		969	cctx_first = first->next;
		970	--cctx_idle;
688		971
689	/* never call directly, always through the coro_state_transfer global variable */	972	cctx_destroy (first);
		973	}
		974
		975	++cctx_idle;
		976	cctx->next = cctx_first;
		977	cctx_first = cctx;
		978	}
		979
		980	/ coroutine switching ***************************************************/
		981
690	static void	982	static void
		983	transfer_check (pTHX_ struct coro prev, struct coro next)
		984	{
		985	if (expect_true (prev != next))
		986	{
		987	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		988	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		989
		990	if (expect_false (next->flags & CF_RUNNING))
		991	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		992
		993	if (expect_false (next->flags & CF_DESTROYED))
		994	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		995
		996	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		997	croak ("Coro::State::transfer called while parsing, but this is not supported");
		998	}
		999	}
		1000
		1001	/* always use the TRANSFER macro */
		1002	static void NOINLINE
691	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	1003	transfer (pTHX_ struct coro prev, struct coro next)
692	{	1004	{
693	dSTACKLEVEL;	1005	dSTACKLEVEL;
694		1006
695	/* sometimes transfer is only called to set idle_sp */	1007	/* sometimes transfer is only called to set idle_sp */
696	if (flags == TRANSFER_SET_STACKLEVEL)	1008	if (expect_false (!next))
		1009	{
697	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1010	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
698	else if (prev != next)	1011	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
699	{	1012	}
		1013	else if (expect_true (prev != next))
		1014	{
700	coro_stack *prev__stack;	1015	coro_cctx *prev__cctx;
		1016
		1017	if (expect_false (prev->flags & CF_NEW))
		1018	{
		1019	/* create a new empty context */
		1020	Newz (0, prev->cctx, 1, coro_cctx);
		1021	prev->flags &= ~CF_NEW;
		1022	prev->flags \|= CF_RUNNING;
		1023	}
		1024
		1025	prev->flags &= ~CF_RUNNING;
		1026	next->flags \|= CF_RUNNING;
701		1027
702	LOCK;	1028	LOCK;
703		1029
704	if (next->mainstack)	1030	if (expect_false (next->flags & CF_NEW))
705	{	1031	{
706	/* coroutine already started */	1032	/* need to start coroutine */
707	SAVE (prev, flags);	1033	next->flags &= ~CF_NEW;
708	LOAD (next);	1034	/* first get rid of the old state */
		1035	save_perl (aTHX_ prev);
		1036	/* setup coroutine call */
		1037	coro_setup (aTHX_ next);
709	}	1038	}
710	else	1039	else
711	{	1040	{
712	/* need to start coroutine */	1041	/* coroutine already started */
713	/* first get rid of the old state */	1042	save_perl (aTHX_ prev);
714	SAVE (prev, -1);	1043	load_perl (aTHX_ next);
715	/* setup coroutine call */
716	setup_coro (next);
717	/* need a stack */
718	next->stack = 0;
719	}	1044	}
720		1045
721	if (!prev->stack)
722	/* create a new empty context */
723	Newz (0, prev->stack, 1, coro_stack);
724
725	prev__stack = prev->stack;	1046	prev__cctx = prev->cctx;
726		1047
727	/* possibly "free" the stack */	1048	/* possibly "free" the cctx */
728	if (prev__stack->idle_sp == STACKLEVEL)	1049	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
729	{	1050	{
730	stack_put (prev__stack);	1051	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1052	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1053
731	prev->stack = 0;	1054	prev->cctx = 0;
		1055
		1056	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1057	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1058	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1059	next->cctx = cctx_get (aTHX);
		1060
		1061	cctx_put (prev__cctx);
732	}	1062	}
733		1063
734	if (!next->stack)	1064	++next->usecount;
735	next->stack = stack_get ();
736		1065
737	if (prev__stack != next->stack)	1066	if (expect_true (!next->cctx))
		1067	next->cctx = cctx_get (aTHX);
		1068
		1069	if (expect_false (prev__cctx != next->cctx))
738	{	1070	{
739	prev__stack->top_env = PL_top_env;	1071	prev__cctx->top_env = PL_top_env;
740	PL_top_env = next->stack->top_env;	1072	PL_top_env = next->cctx->top_env;
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1073	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742	}	1074	}
743		1075
744	free_coro_mortal ();	1076	free_coro_mortal (aTHX);
745
746	UNLOCK;	1077	UNLOCK;
747	}
748	}
749		1078
750	/* use this function pointer to call the above function */	1079	if (expect_false (prev->throw \|\| next->throw))
751	/* this is done to increase chances of the compiler not inlining the call */	1080	{
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */	1081	struct coro *coro = SvSTATE (coro_current);
753	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	1082
		1083	if (coro->throw)
		1084	{
		1085	SV *exception = coro->throw;
		1086	coro->throw = 0;
		1087	sv_setsv (ERRSV, exception);
		1088	croak (0);
		1089	}
		1090	}
		1091	}
		1092	}
754		1093
755	struct transfer_args	1094	struct transfer_args
756	{	1095	{
757	struct coro prev, next;	1096	struct coro prev, next;
758	int flags;
759	};	1097	};
760		1098
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1099	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1100	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
762		1101
		1102	/ high level stuff ******************************************************/
		1103
763	static void	1104	static int
764	coro_state_destroy (struct coro *coro)	1105	coro_state_destroy (pTHX_ struct coro *coro)
765	{	1106	{
766	if (coro->refcnt--)	1107	if (coro->flags & CF_DESTROYED)
767	return;	1108	return 0;
		1109
		1110	coro->flags \|= CF_DESTROYED;
		1111
		1112	if (coro->flags & CF_READY)
		1113	{
		1114	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1115	/* alternative: look through all ready queues and remove the coro */
		1116	LOCK;
		1117	--coro_nready;
		1118	UNLOCK;
		1119	}
		1120	else
		1121	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
768		1122
769	if (coro->mainstack && coro->mainstack != main_mainstack)	1123	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	1124	{
771	struct coro temp;	1125	struct coro temp;
772		1126
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1127	if (coro->flags & CF_RUNNING)
		1128	croak ("FATAL: tried to destroy currently running coroutine");
		1129
		1130	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	1131	load_perl (aTHX_ coro);
775		1132
776	destroy_stacks (aTHX);	1133	coro_destroy (aTHX_ coro);
777		1134
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1135	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
779		1136
780	coro->mainstack = 0;	1137	coro->mainstack = 0;
781	}	1138	}
782		1139
783	stack_free (coro->stack);	1140	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	1141	SvREFCNT_dec (coro->args);
785	Safefree (coro);	1142
		1143	if (coro->next) coro->next->prev = coro->prev;
		1144	if (coro->prev) coro->prev->next = coro->next;
		1145	if (coro == coro_first) coro_first = coro->next;
		1146
		1147	return 1;
786	}	1148	}
787		1149
788	static int	1150	static int
789	coro_state_clear (SV sv, MAGIC mg)	1151	coro_state_free (pTHX_ SV sv, MAGIC mg)
790	{	1152	{
791	struct coro coro = (struct coro )mg->mg_ptr;	1153	struct coro coro = (struct coro )mg->mg_ptr;
792	mg->mg_ptr = 0;	1154	mg->mg_ptr = 0;
793		1155
		1156	coro->hv = 0;
		1157
		1158	if (--coro->refcnt < 0)
		1159	{
794	coro_state_destroy (coro);	1160	coro_state_destroy (aTHX_ coro);
		1161	Safefree (coro);
		1162	}
795		1163
796	return 0;	1164	return 0;
797	}	1165	}
798		1166
799	static int	1167	static int
800	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1168	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
801	{	1169	{
802	struct coro coro = (struct coro )mg->mg_ptr;	1170	struct coro coro = (struct coro )mg->mg_ptr;
803		1171
804	++coro->refcnt;	1172	++coro->refcnt;
805		1173
806	return 0;	1174	return 0;
807	}	1175	}
808		1176
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1177	static MGVTBL coro_state_vtbl = {
		1178	0, 0, 0, 0,
		1179	coro_state_free,
		1180	0,
		1181	#ifdef MGf_DUP
		1182	coro_state_dup,
		1183	#else
		1184	# define MGf_DUP 0
		1185	#endif
		1186	};
810		1187
811	static struct coro *
812	SvSTATE (SV *coro)
813	{
814	HV *stash;
815	MAGIC *mg;
816
817	if (SvROK (coro))
818	coro = SvRV (coro);
819
820	stash = SvSTASH (coro);
821	if (stash != coro_stash && stash != coro_state_stash)
822	{
823	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");
826	}
827
828	mg = SvMAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;
831	}
832
833	static void	1188	static void
834	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)	1189	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
835	{	1190	{
836	ta->prev = SvSTATE (prev);	1191	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	1192	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;	1193	TRANSFER_CHECK (*ta);
839	}	1194	}
840		1195
841	static void	1196	static void
842	api_transfer (SV prev, SV next, int flags)	1197	api_transfer (SV prev_sv, SV next_sv)
843	{	1198	{
844	dTHX;	1199	dTHX;
845	struct transfer_args ta;	1200	struct transfer_args ta;
846		1201
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	1202	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	1203	TRANSFER (ta);
849	}	1204	}
850		1205
851	/ Coro ******************************************************************/	1206	/ Coro ******************************************************************/
852		1207
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV coro_current, coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	1208	static void
866	coro_enq (pTHX_ SV *sv)	1209	coro_enq (pTHX_ SV *coro_sv)
867	{	1210	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	1211	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	1212	}
878		1213
879	static SV *	1214	static SV *
880	coro_deq (pTHX_ int min_prio)	1215	coro_deq (pTHX_ int min_prio)
881	{	1216	{
…		…
885	if (min_prio < 0)	1220	if (min_prio < 0)
886	min_prio = 0;	1221	min_prio = 0;
887		1222
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1223	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1224	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1225	return av_shift (coro_ready [prio]);
893	}
894		1226
895	return 0;	1227	return 0;
896	}	1228	}
897		1229
898	static void	1230	static int
899	api_ready (SV *coro)	1231	api_ready (SV *coro_sv)
900	{	1232	{
901	dTHX;	1233	dTHX;
		1234	struct coro *coro;
902		1235
903	if (SvROK (coro))	1236	if (SvROK (coro_sv))
904	coro = SvRV (coro);	1237	coro_sv = SvRV (coro_sv);
		1238
		1239	coro = SvSTATE (coro_sv);
		1240
		1241	if (coro->flags & CF_READY)
		1242	return 0;
		1243
		1244	coro->flags \|= CF_READY;
905		1245
906	LOCK;	1246	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1247	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1248	++coro_nready;
908	UNLOCK;	1249	UNLOCK;
909	}
910		1250
		1251	return 1;
		1252	}
		1253
911	static void	1254	static int
		1255	api_is_ready (SV *coro_sv)
		1256	{
		1257	dTHX;
		1258	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1259	}
		1260
		1261	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	1262	prepare_schedule (pTHX_ struct transfer_args *ta)
913	{	1263	{
914	SV current, prev, *next;	1264	SV prev_sv, next_sv;
		1265
		1266	for (;;)
		1267	{
		1268	LOCK;
		1269	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1270
		1271	/* nothing to schedule: call the idle handler */
		1272	if (expect_false (!next_sv))
		1273	{
		1274	dSP;
		1275	UNLOCK;
		1276
		1277	ENTER;
		1278	SAVETMPS;
		1279
		1280	PUSHMARK (SP);
		1281	PUTBACK;
		1282	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1283
		1284	FREETMPS;
		1285	LEAVE;
		1286	continue;
		1287	}
		1288
		1289	ta->next = SvSTATE (next_sv);
		1290
		1291	/* cannot transfer to destroyed coros, skip and look for next */
		1292	if (expect_false (ta->next->flags & CF_DESTROYED))
		1293	{
		1294	UNLOCK;
		1295	SvREFCNT_dec (next_sv);
		1296	/* coro_nready is already taken care of by destroy */
		1297	continue;
		1298	}
		1299
		1300	--coro_nready;
		1301	UNLOCK;
		1302	break;
		1303	}
		1304
		1305	/* free this only after the transfer */
		1306	prev_sv = SvRV (coro_current);
		1307	ta->prev = SvSTATE (prev_sv);
		1308	TRANSFER_CHECK (*ta);
		1309	assert (ta->next->flags & CF_READY);
		1310	ta->next->flags &= ~CF_READY;
		1311	SvRV_set (coro_current, next_sv);
915		1312
916	LOCK;	1313	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	free_coro_mortal ();	1314	free_coro_mortal (aTHX);
951	coro_mortal = prev;	1315	coro_mortal = prev_sv;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;	1316	UNLOCK;
958	}	1317	}
959		1318
960	static void	1319	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1320	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1321	{
963	LOCK;	1322	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1323	prepare_schedule (aTHX_ ta);
		1324	}
		1325
		1326	static int
		1327	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1328	{
		1329	if (coro_nready)
		1330	{
		1331	SV *prev = SvRV (coro_current);
		1332	prepare_schedule (aTHX_ ta);
		1333	api_ready (prev);
		1334	return 1;
		1335	}
		1336	else
		1337	return 0;
968	}	1338	}
969		1339
970	static void	1340	static void
971	api_schedule (void)	1341	api_schedule (void)
972	{	1342	{
973	dTHX;	1343	dTHX;
974	struct transfer_args ta;	1344	struct transfer_args ta;
975		1345
976	prepare_schedule (&ta);	1346	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1347	TRANSFER (ta);
978	}	1348	}
979		1349
980	static void	1350	static int
981	api_cede (void)	1351	api_cede (void)
982	{	1352	{
983	dTHX;	1353	dTHX;
984	struct transfer_args ta;	1354	struct transfer_args ta;
985		1355
986	prepare_cede (&ta);	1356	prepare_cede (aTHX_ &ta);
		1357
		1358	if (expect_true (ta.prev != ta.next))
		1359	{
987	TRANSFER (ta);	1360	TRANSFER (ta);
		1361	return 1;
		1362	}
		1363	else
		1364	return 0;
988	}	1365	}
989		1366
		1367	static int
		1368	api_cede_notself (void)
		1369	{
		1370	dTHX;
		1371	struct transfer_args ta;
		1372
		1373	if (prepare_cede_notself (aTHX_ &ta))
		1374	{
		1375	TRANSFER (ta);
		1376	return 1;
		1377	}
		1378	else
		1379	return 0;
		1380	}
		1381
		1382	static void
		1383	api_trace (SV *coro_sv, int flags)
		1384	{
		1385	dTHX;
		1386	struct coro *coro = SvSTATE (coro_sv);
		1387
		1388	if (flags & CC_TRACE)
		1389	{
		1390	if (!coro->cctx)
		1391	coro->cctx = cctx_new ();
		1392	else if (!(coro->cctx->flags & CC_TRACE))
		1393	croak ("cannot enable tracing on coroutine with custom stack");
		1394
		1395	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1396	}
		1397	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1398	{
		1399	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1400
		1401	if (coro->flags & CF_RUNNING)
		1402	PL_runops = RUNOPS_DEFAULT;
		1403	else
		1404	coro->runops = RUNOPS_DEFAULT;
		1405	}
		1406	}
		1407
990	MODULE = Coro::State PACKAGE = Coro::State	1408	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1409
992	PROTOTYPES: DISABLE	1410	PROTOTYPES: DISABLE
993		1411
994	BOOT:	1412	BOOT:
995	{	1413	{
996	#ifdef USE_ITHREADS	1414	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1415	MUTEX_INIT (&coro_mutex);
998	#endif	1416	#endif
999	BOOT_PAGESIZE;	1417	BOOT_PAGESIZE;
1000		1418
		1419	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1420	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1421
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1422	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1423
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1424	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1425	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1426	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1427	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1428
1007	main_mainstack = PL_mainstack;	1429	main_mainstack = PL_mainstack;
		1430	main_top_env = PL_top_env;
		1431
		1432	while (main_top_env->je_prev)
		1433	main_top_env = main_top_env->je_prev;
1008		1434
1009	coroapi.ver = CORO_API_VERSION;	1435	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1436	coroapi.transfer = api_transfer;
1011		1437
1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1438	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1019	struct coro *coro;	1445	struct coro *coro;
1020	HV *hv;	1446	HV *hv;
1021	int i;	1447	int i;
1022		1448
1023	Newz (0, coro, 1, struct coro);	1449	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1450	coro->args = newAV ();
		1451	coro->flags = CF_NEW;
1025		1452
		1453	if (coro_first) coro_first->prev = coro;
		1454	coro->next = coro_first;
		1455	coro_first = coro;
		1456
1026	hv = newHV ();	1457	coro->hv = hv = newHV ();
1027	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1458	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1459	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1460
		1461	av_extend (coro->args, items - 1);
1030	for (i = 1; i < items; i++)	1462	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1463	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/coro->mainstack = 0; //actual work is done inside transfer /
1034	/coro->stack = 0;/
1035	}	1464	}
1036	OUTPUT:	1465	OUTPUT:
1037	RETVAL	1466	RETVAL
1038		1467
		1468	# these not obviously related functions are all rolled into the same xs
		1469	# function to increase chances that they all will call transfer with the same
		1470	# stack offset
1039	void	1471	void
1040	_set_stacklevel (...)	1472	_set_stacklevel (...)
1041	ALIAS:	1473	ALIAS:
1042	Coro::State::transfer = 1	1474	Coro::State::transfer = 1
1043	Coro::schedule = 2	1475	Coro::schedule = 2
1044	Coro::cede = 3	1476	Coro::cede = 3
1045	Coro::Cont::yield = 4	1477	Coro::cede_notself = 4
1046	CODE:	1478	CODE:
1047	{	1479	{
1048	struct transfer_args ta;	1480	struct transfer_args ta;
1049		1481
1050	switch (ix)	1482	switch (ix)
1051	{	1483	{
1052	case 0:	1484	case 0:
1053	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1485	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1054	ta.next = 0;	1486	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1487	break;
1057		1488
1058	case 1:	1489	case 1:
1059	if (items != 3)	1490	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1491	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1492
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1493	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1494	break;
1064		1495
1065	case 2:	1496	case 2:
1066	prepare_schedule (&ta);	1497	prepare_schedule (aTHX_ &ta);
1067	break;	1498	break;
1068		1499
1069	case 3:	1500	case 3:
1070	prepare_cede (&ta);	1501	prepare_cede (aTHX_ &ta);
1071	break;	1502	break;
1072		1503
1073	case 4:	1504	case 4:
1074	{	1505	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1506	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1507
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1508	break;
1098
1099	}	1509	}
1100		1510
		1511	BARRIER;
1101	TRANSFER (ta);	1512	TRANSFER (ta);
1102	}
1103		1513
1104	void	1514	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1105	_clone_state_from (SV dst, SV src)	1515	XSRETURN_YES;
		1516	}
		1517
		1518	bool
		1519	_destroy (SV *coro_sv)
1106	CODE:	1520	CODE:
1107	{	1521	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1522	OUTPUT:
1109		1523	RETVAL
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1114	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1524
1122	void	1525	void
1123	_exit (code)	1526	_exit (code)
1124	int code	1527	int code
1125	PROTOTYPE: $	1528	PROTOTYPE: $
1126	CODE:	1529	CODE:
1127	_exit (code);	1530	_exit (code);
1128		1531
		1532	int
		1533	cctx_stacksize (int new_stacksize = 0)
		1534	CODE:
		1535	RETVAL = coro_stacksize;
		1536	if (new_stacksize)
		1537	coro_stacksize = new_stacksize;
		1538	OUTPUT:
		1539	RETVAL
		1540
		1541	int
		1542	cctx_count ()
		1543	CODE:
		1544	RETVAL = cctx_count;
		1545	OUTPUT:
		1546	RETVAL
		1547
		1548	int
		1549	cctx_idle ()
		1550	CODE:
		1551	RETVAL = cctx_idle;
		1552	OUTPUT:
		1553	RETVAL
		1554
		1555	void
		1556	list ()
		1557	PPCODE:
		1558	{
		1559	struct coro *coro;
		1560	for (coro = coro_first; coro; coro = coro->next)
		1561	if (coro->hv)
		1562	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1563	}
		1564
		1565	void
		1566	call (Coro::State coro, SV *coderef)
		1567	ALIAS:
		1568	eval = 1
		1569	CODE:
		1570	{
		1571	if (coro->mainstack)
		1572	{
		1573	struct coro temp;
		1574	Zero (&temp, 1, struct coro);
		1575
		1576	if (!(coro->flags & CF_RUNNING))
		1577	{
		1578	save_perl (aTHX_ &temp);
		1579	load_perl (aTHX_ coro);
		1580	}
		1581
		1582	{
		1583	dSP;
		1584	ENTER;
		1585	SAVETMPS;
		1586	PUSHMARK (SP);
		1587	PUTBACK;
		1588	if (ix)
		1589	eval_sv (coderef, 0);
		1590	else
		1591	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1592	SPAGAIN;
		1593	FREETMPS;
		1594	LEAVE;
		1595	PUTBACK;
		1596	}
		1597
		1598	if (!(coro->flags & CF_RUNNING))
		1599	{
		1600	save_perl (aTHX_ coro);
		1601	load_perl (aTHX_ &temp);
		1602	}
		1603	}
		1604	}
		1605
		1606	SV *
		1607	is_ready (Coro::State coro)
		1608	PROTOTYPE: $
		1609	ALIAS:
		1610	is_ready = CF_READY
		1611	is_running = CF_RUNNING
		1612	is_new = CF_NEW
		1613	is_destroyed = CF_DESTROYED
		1614	CODE:
		1615	RETVAL = boolSV (coro->flags & ix);
		1616	OUTPUT:
		1617	RETVAL
		1618
		1619	void
		1620	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1621
		1622	SV *
		1623	has_stack (Coro::State coro)
		1624	PROTOTYPE: $
		1625	CODE:
		1626	RETVAL = boolSV (!!coro->cctx);
		1627	OUTPUT:
		1628	RETVAL
		1629
		1630	int
		1631	is_traced (Coro::State coro)
		1632	PROTOTYPE: $
		1633	CODE:
		1634	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1635	OUTPUT:
		1636	RETVAL
		1637
		1638	IV
		1639	rss (Coro::State coro)
		1640	PROTOTYPE: $
		1641	ALIAS:
		1642	usecount = 1
		1643	CODE:
		1644	switch (ix)
		1645	{
		1646	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1647	case 1: RETVAL = coro->usecount; break;
		1648	}
		1649	OUTPUT:
		1650	RETVAL
		1651
		1652
1129	MODULE = Coro::State PACKAGE = Coro	1653	MODULE = Coro::State PACKAGE = Coro
1130		1654
1131	BOOT:	1655	BOOT:
1132	{	1656	{
1133	int i;	1657	int i;
		1658
		1659	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1660	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1661	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1662
		1663	coro_current = get_sv ("Coro::current", FALSE);
		1664	SvREADONLY_on (coro_current);
1134		1665
1135	coro_stash = gv_stashpv ("Coro", TRUE);	1666	coro_stash = gv_stashpv ("Coro", TRUE);
1136		1667
1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1668	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1669	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1670	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1671	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1672	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1673	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1674
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1675	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1676	coro_ready[i] = newAV ();
1149		1677
1150	{	1678	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1679	SV *sv = perl_get_sv("Coro::API", 1);
1152		1680
1153	coroapi.schedule = api_schedule;	1681	coroapi.schedule = api_schedule;
1154	coroapi.cede = api_cede;	1682	coroapi.cede = api_cede;
		1683	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1684	coroapi.ready = api_ready;
		1685	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1686	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1687	coroapi.current = coro_current;
1158		1688
1159	GCoroAPI = &coroapi;	1689	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1690	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1691	SvREADONLY_on (sv);
1162	}	1692	}
1163	}	1693	}
		1694
		1695	void
		1696	_set_current (SV *current)
		1697	PROTOTYPE: $
		1698	CODE:
		1699	SvREFCNT_dec (SvRV (coro_current));
		1700	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1701
1165	int	1702	int
1166	prio (Coro::State coro, int newprio = 0)	1703	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1704	ALIAS:
1168	nice = 1	1705	nice = 1
…		…
1171	RETVAL = coro->prio;	1708	RETVAL = coro->prio;
1172		1709
1173	if (items > 1)	1710	if (items > 1)
1174	{	1711	{
1175	if (ix)	1712	if (ix)
1176	newprio += coro->prio;	1713	newprio = coro->prio - newprio;
1177		1714
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1715	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1716	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1717
1181	coro->prio = newprio;	1718	coro->prio = newprio;
1182	}	1719	}
1183	}	1720	}
		1721	OUTPUT:
		1722	RETVAL
1184		1723
1185	void	1724	SV *
1186	ready (SV *self)	1725	ready (SV *self)
1187	PROTOTYPE: $	1726	PROTOTYPE: $
1188	CODE:	1727	CODE:
1189	api_ready (self);	1728	RETVAL = boolSV (api_ready (self));
		1729	OUTPUT:
		1730	RETVAL
1190		1731
1191	int	1732	int
1192	nready (...)	1733	nready (...)
1193	PROTOTYPE:	1734	PROTOTYPE:
1194	CODE:	1735	CODE:
1195	RETVAL = coro_nready;	1736	RETVAL = coro_nready;
1196	OUTPUT:	1737	OUTPUT:
1197	RETVAL	1738	RETVAL
1198		1739
		1740	void
		1741	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1742	PROTOTYPE: $;$
		1743	CODE:
		1744	SvREFCNT_dec (self->throw);
		1745	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1746
		1747	# for async_pool speedup
		1748	void
		1749	_pool_1 (SV *cb)
		1750	CODE:
		1751	{
		1752	struct coro *coro = SvSTATE (coro_current);
		1753	HV hv = (HV )SvRV (coro_current);
		1754	AV *defav = GvAV (PL_defgv);
		1755	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1756	AV *invoke_av;
		1757	int i, len;
		1758
		1759	if (!invoke)
		1760	croak ("\3async_pool terminate\2\n");
		1761
		1762	SvREFCNT_dec (coro->saved_deffh);
		1763	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1764
		1765	hv_store (hv, "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1767
		1768	invoke_av = (AV *)SvRV (invoke);
		1769	len = av_len (invoke_av);
		1770
		1771	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1772
		1773	if (len > 0)
		1774	{
		1775	av_fill (defav, len - 1);
		1776	for (i = 0; i < len; ++i)
		1777	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1778	}
		1779
		1780	SvREFCNT_dec (invoke);
		1781	}
		1782
		1783	void
		1784	_pool_2 (SV *cb)
		1785	CODE:
		1786	{
		1787	struct coro *coro = SvSTATE (coro_current);
		1788
		1789	sv_setsv (cb, &PL_sv_undef);
		1790
		1791	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1792	coro->saved_deffh = 0;
		1793
		1794	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1795	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1796	croak ("\3async_pool terminate\2\n");
		1797
		1798	av_clear (GvAV (PL_defgv));
		1799	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1800	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1801
		1802	coro->prio = 0;
		1803
		1804	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1805	api_trace (coro_current, 0);
		1806
		1807	av_push (av_async_pool, newSVsv (coro_current));
		1808	}
		1809
		1810
1199	MODULE = Coro::State PACKAGE = Coro::AIO	1811	MODULE = Coro::State PACKAGE = Coro::AIO
1200		1812
1201	SV *	1813	SV *
1202	_get_state ()	1814	_get_state ()
1203	CODE:	1815	CODE:
1204	{	1816	{
1205	struct {	1817	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1818
		1819	RETVAL = newSV (sizeof (struct io_state));
		1820	data = (struct io_state *)SvPVX (RETVAL);
		1821	SvCUR_set (RETVAL, sizeof (struct io_state));
		1822	SvPOK_only (RETVAL);
		1823
1212	data.errorno = errno;	1824	data->errorno = errno;
1213	data.laststype = PL_laststype;	1825	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1826	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1827	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1828	}
1219	OUTPUT:	1829	OUTPUT:
1220	RETVAL	1830	RETVAL
1221		1831
1222	void	1832	void
1223	_set_state (char *data_)	1833	_set_state (char *data_)
1224	PROTOTYPE: $	1834	PROTOTYPE: $
1225	CODE:	1835	CODE:
1226	{	1836	{
1227	struct {	1837	struct io_state data = (void )data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} data = (void )data_;
1233		1838
1234	errno = data->errorno;	1839	errno = data->errorno;
1235	PL_laststype = data->laststype;	1840	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1841	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1842	PL_statcache = data->statcache;
1238	}	1843	}
		1844

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Comparing Coro/Coro/State.xs (file contents): Revision 1.96 by root, Sun Nov 26 18:25:11 2006 UTC vs. Revision 1.197 by root, Sat Oct 6 19:25:00 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.96 by root, Sun Nov 26 18:25:11 2006 UTC vs.
Revision 1.197 by root, Sat Oct 6 19:25:00 2007 UTC