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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs.
Revision 1.208 by root, Wed Oct 10 00:53:18 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef HAVE_MMAP
		17	# include <unistd.h>
		18	# include <sys/mman.h>
		19	# ifndef MAP_ANONYMOUS
		20	# ifdef MAP_ANON
		21	# define MAP_ANONYMOUS MAP_ANON
		22	# else
		23	# undef HAVE_MMAP
		24	# endif
		25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
		33	# endif
		34	#else
		35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
		38
		39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	\|\| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	56	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	57	# define PL_ppaddr ppaddr
14	# endif	58	# endif
15	# ifndef call_sv	59	# ifndef call_sv
16	# define call_sv perl_call_sv	60	# define call_sv perl_call_sv
27	# ifndef IS_PADCONST	71	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	72	# define IS_PADCONST(v) 0
29	# endif	73	# endif
30	#endif	74	#endif
31		75
32	#include <errno.h>	76	/* 5.8.7 */
		77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
33		88
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	90	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	91	#endif
52	# include <limits.h>	92
53	# ifndef PAGESIZE	93	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	94	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	95	#endif
60	#endif
61		96
62	#define SUB_INIT "Coro::State::initialize"	97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
63		101
64	/* The next macro should declare a variable stacklevel that contains and approximation	102	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
66	* and should be unique. */	104	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
68		106
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		108
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
72		123
73	#include "CoroAPI.h"	124	#include "CoroAPI.h"
74		125
75	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
…		…
79	#else	130	#else
80	# define LOCK (void)0	131	# define LOCK (void)0
81	# define UNLOCK (void)0	132	# define UNLOCK (void)0
82	#endif	133	#endif
83		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
		138	struct io_state
		139	{
		140	int errorno;
		141	I32 laststype;
		142	int laststatval;
		143	Stat_t statcache;
		144	};
		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
85	static AV main_mainstack; / used to differentiate between $main and others */	148	static AV main_mainstack; / used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
86	static HV coro_state_stash, coro_stash;	150	static HV coro_state_stash, coro_stash;
87	static SV coro_mortal; / will be freed after next transfer */	151	static SV coro_mortal; / will be freed after next transfer */
88		152
89	/* this is actually not just the c stack but also c registers etc... */	153	static GV irsgv; / $/ */
		154	static GV stdoutgv; / STDOUT /
		155
		156	static HV hv_sig; / %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
		165	static struct coro_cctx *cctx_first;
		166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		175	};
		176
		177	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	178	typedef struct coro_cctx {
91	struct coro_stack *next;	179	struct coro_cctx *next;
92		180
93	void *idle_sp;	181	/* the stack */
94	void *sptr;	182	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	183	size_t ssize;
96		184
97	/* cpu state */	185	/* cpu state */
		186	void idle_sp; / sp of top-level transfer/schedule/cede call */
		187	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		188	JMPENV *top_env;
98	coro_context cctx;	189	coro_context cctx;
99	} coro_stack;
100		190
101	static coro_stack *main_stack;	191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
102		196
		197	enum {
		198	CF_RUNNING = 0x0001, /* coroutine is running */
		199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		205	typedef struct {
		206	SV *defsv;
		207	AV *defav;
		208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
		214
		215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		216
		217	/* this is a structure representing a perl-level coroutine */
103	struct coro {	218	struct coro {
104	/* optionally saved, might be zero */	219	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	220	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112		221
113	/* the c stack, if any */	222	/* process data */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;	223	AV *mainstack;
120	SV **stack_sp;	224	perl_slots slot; / basically the saved sp */
121	OP *op;	225
122	SV **curpad;	226	AV args; / data associated with this coroutine (initial args) */
123	AV *comppad;	227	int refcnt; /* coroutines are refcounted, yes */
124	CV *compcv;	228	int flags; /* CF_ flags */
125	SV **stack_base;	229	HV hv; / the perl hash associated with this coro, if any */
126	SV **stack_max;	230
127	SV **tmps_stack;	231	/* statistics */
128	I32 tmps_floor;	232	int usecount; /* number of transfers to this coro */
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146		233
147	/* coro process data */	234	/* coro process data */
148	int prio;	235	int prio;
		236	SV throw; / exception to be thrown */
149		237
150	/* data associated with this coroutine (initial args) */	238	/* async_pool */
151	AV *args;	239	SV *saved_deffh;
152	int refcnt;	240
		241	/* linked list */
		242	struct coro next, prev;
153	};	243	};
154		244
155	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
157		247
		248	/ Coro ******************************************************************/
		249
		250	#define PRIO_MAX 3
		251	#define PRIO_HIGH 1
		252	#define PRIO_NORMAL 0
		253	#define PRIO_LOW -1
		254	#define PRIO_IDLE -3
		255	#define PRIO_MIN -4
		256
		257	/* for Coro.pm */
		258	static SV *coro_current;
		259	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		260	static int coro_nready;
		261	static struct coro *coro_first;
		262
		263	/ lowlevel stuff ********************************************************/
		264
		265	static SV *
		266	coro_get_sv (const char *name, int create)
		267	{
		268	#if PERL_VERSION_ATLEAST (5,9,0)
		269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		270	get_sv (name, create);
		271	#endif
		272	return get_sv (name, create);
		273	}
		274
		275	static AV *
		276	coro_get_av (const char *name, int create)
		277	{
		278	#if PERL_VERSION_ATLEAST (5,9,0)
		279	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		280	get_av (name, create);
		281	#endif
		282	return get_av (name, create);
		283	}
		284
		285	static HV *
		286	coro_get_hv (const char *name, int create)
		287	{
		288	#if PERL_VERSION_ATLEAST (5,9,0)
		289	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		290	get_hv (name, create);
		291	#endif
		292	return get_hv (name, create);
		293	}
		294
158	static AV *	295	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	296	coro_clone_padlist (pTHX_ CV *cv)
160	{	297	{
161	AV *padlist = CvPADLIST (cv);	298	AV *padlist = CvPADLIST (cv);
162	AV newpadlist, newpad;	299	AV newpadlist, newpad;
163		300
164	newpadlist = newAV ();	301	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	302	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	303	#if PERL_VERSION_ATLEAST (5,9,0)
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		305	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	307	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	308	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	309	--AvFILLp (padlist);
173		310
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	311	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		355
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	356	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		357
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	358	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		359
		360	#define CORO_MAGIC(cv) \
		361	SvMAGIC (cv) \
		362	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		363	? SvMAGIC (cv) \
		364	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		365	: 0
		366
		367	static struct coro *
		368	SvSTATE_ (pTHX_ SV *coro)
		369	{
		370	HV *stash;
		371	MAGIC *mg;
		372
		373	if (SvROK (coro))
		374	coro = SvRV (coro);
		375
		376	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		377	croak ("Coro::State object required");
		378
		379	stash = SvSTASH (coro);
		380	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		381	{
		382	/* very slow, but rare, check */
		383	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		384	croak ("Coro::State object required");
		385	}
		386
		387	mg = CORO_MAGIC (coro);
		388	return (struct coro *)mg->mg_ptr;
		389	}
		390
		391	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		392
223	/* the next two functions merely cache the padlists */	393	/* the next two functions merely cache the padlists */
224	static void	394	static void
225	get_padlist (pTHX_ CV *cv)	395	get_padlist (pTHX_ CV *cv)
226	{	396	{
227	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	397	MAGIC *mg = CORO_MAGIC (cv);
		398	AV *av;
228		399
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	402	else
232	{	403	{
233	#if 0	404	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	405	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	406	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	407	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	408	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	409	SvREFCNT_dec (cp);
239	#else	410	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	414	}
244		415
245	static void	416	static void
246	put_padlist (pTHX_ CV *cv)	417	put_padlist (pTHX_ CV *cv)
247	{	418	{
248	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	419	MAGIC *mg = CORO_MAGIC (cv);
		420	AV *av;
249		421
250	if (!mg)	422	if (expect_false (!mg))
251	{	423	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	426	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	427	mg->mg_obj = (SV *)newAV ();
256	}	428	}
257		429
258	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	430	av = (AV *)mg->mg_obj;
259	}
260		431
261	#define SB do {	432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	433	av_extend (av, AvMAX (av) + 1);
263		434
264	#define LOAD(state) load_state(aTHX_ (state));	435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	436	}
266		437
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	438	/ load & save, init *****************************************************/
268		439
269	static void	440	static void
270	load_state(pTHX_ Coro__State c)	441	load_perl (pTHX_ Coro__State c)
271	{	442	{
272	PL_dowarn = c->dowarn;	443	perl_slots *slot = c->slot;
273	PL_in_eval = c->in_eval;	444	c->slot = 0;
274		445
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;	446	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
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	PL_top_env = c->top_env;
306		447
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	448	GvSV (PL_defgv) = slot->defsv;
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	449	GvAV (PL_defgv) = slot->defav;
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	450	GvSV (PL_errgv) = slot->errsv;
		451	GvSV (irsgv) = slot->irsgv;
		452
		453	#define VAR(name,type) PL_ ## name = slot->name;
		454	# include "state.h"
		455	#undef VAR
		456
		457	/hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);/
		458	/hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);/
310		459
311	{	460	{
312	dSP;	461	dSP;
		462
313	CV *cv;	463	CV *cv;
314		464
315	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
317	{	467	{
318	AV padlist = (AV )POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
324	}	470	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	471	}
328		472
329	PUTBACK;	473	PUTBACK;
330	}	474	}
331	}	475	}
332		476
333	static void	477	static void
334	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
335	{	479	{
336	{	480	{
337	dSP;	481	dSP;
338	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	486	/*
343	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
345	*/	489	*/
346		490
347	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
349	for (;;)	493	for (;;)
350	{	494	{
351	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
352	{	496	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
354		498
355	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
356	{	500	{
357	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
358	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
359	{	504	{
360	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
371		509
		510	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
373	}	512	}
374	}	513	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	514	}
384		515
385	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
386	break;	517	break;
387		518
388	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
391	}	522	}
392		523
393	PUTBACK;	524	PUTBACK;
394	}	525	}
395		526
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
399		538
400	c->dowarn = PL_dowarn;
401	c->in_eval = PL_in_eval;
402
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;	540
407	c->op = PL_op;	541	{
408	c->curpad = PL_curpad;	542	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
409	c->comppad = PL_comppad;	543
410	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
411	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
412	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
413	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
414	c->tmps_floor = PL_tmps_floor;	548
415	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
416	c->tmps_max = PL_tmps_max;	550	# include "state.h"
417	c->markstack = PL_markstack;	551	#undef VAR
418	c->markstack_ptr = PL_markstack_ptr;	552	}
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	553	}
435		554
436	/*	555	/*
437	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
441	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
442	static void	564	static void
443	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
444	{	566	{
445	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		571
452	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		575
456	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	579	PL_tmps_max = 32;
460		580
461	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
464		584
465	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
467	#endif	587	#endif
468		588
469	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
472		592
473	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	595	PL_savestack_max = 24;
476		596
477	#if PERL_VERSION < 9	597	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	600	PL_retstack_max = 4;
481	#endif	601	#endif
482
483	UNLOCK;
484	}	602	}
		603	#endif
485		604
486	/*	605	/*
487	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
488	*/	607	*/
489	static void	608	static void
490	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
491	{	610	{
492	if (!IN_DESTRUCT)
493	{
494	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);
496
497	/* sure it is, but more important: is it correct?? :/ */
498	FREETMPS;
499
500	/POPSTACK_TO (PL_mainstack);//D//use/
501	}
502
503	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
505		613
506	while (PL_curstackinfo)	614	while (PL_curstackinfo)
507	{	615	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
509		617
510	{ /D//remove/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/D//remove/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		620
522	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	623	PL_curstackinfo = p;
525	}	624	}
526		625
527	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	627	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	629	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	630	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	631	Safefree (PL_retstack);
533	#endif	632	#endif
534	}	633	}
535		634
536	static void	635	static size_t
537	setup_coro (struct coro *coro)	636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/ coroutine stack handling **********************************************/
		673
		674	static void
		675	coro_setup (pTHX_ struct coro *coro)
538	{	676	{
539	/*	677	/*
540	* emulate part of the perl startup here.	678	* emulate part of the perl startup here.
541	*/	679	*/
542	dTHX;	680	coro_init_stacks (aTHX);
		681
		682	PL_runops = RUNOPS_DEFAULT;
		683	PL_curcop = &PL_compiling;
		684	PL_in_eval = EVAL_NULL;
		685	PL_comppad = 0;
		686	PL_curpm = 0;
		687	PL_curpad = 0;
		688	PL_localizing = 0;
		689	PL_dirty = 0;
		690	PL_restartop = 0;
		691	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		692	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		693
		694	GvSV (PL_defgv) = newSV (0);
		695	GvAV (PL_defgv) = coro->args; coro->args = 0;
		696	GvSV (PL_errgv) = newSV (0);
		697	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		698	PL_rs = newSVsv (GvSV (irsgv));
		699	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		700
		701	{
		702	dSP;
		703	LOGOP myop;
		704
		705	Zero (&myop, 1, LOGOP);
		706	myop.op_next = Nullop;
		707	myop.op_flags = OPf_WANT_VOID;
		708
		709	PUSHMARK (SP);
		710	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		711	PUTBACK;
		712	PL_op = (OP *)&myop;
		713	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		714	SPAGAIN;
		715	}
		716
		717	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		718	}
		719
		720	static void
		721	coro_destroy (pTHX_ struct coro *coro)
		722	{
		723	if (!IN_DESTRUCT)
		724	{
		725	/* restore all saved variables and stuff */
		726	LEAVE_SCOPE (0);
		727	assert (PL_tmps_floor == -1);
		728
		729	/* free all temporaries */
		730	FREETMPS;
		731	assert (PL_tmps_ix == -1);
		732
		733	/* unwind all extra stacks */
		734	POPSTACK_TO (PL_mainstack);
		735
		736	/* unwind main stack */
		737	dounwind (-1);
		738	}
		739
		740	SvREFCNT_dec (GvSV (PL_defgv));
		741	SvREFCNT_dec (GvAV (PL_defgv));
		742	SvREFCNT_dec (GvSV (PL_errgv));
		743	SvREFCNT_dec (PL_defoutgv);
		744	SvREFCNT_dec (PL_rs);
		745	SvREFCNT_dec (GvSV (irsgv));
		746
		747	SvREFCNT_dec (PL_diehook);
		748	SvREFCNT_dec (PL_warnhook);
		749
		750	SvREFCNT_dec (coro->saved_deffh);
		751	SvREFCNT_dec (coro->throw);
		752
		753	coro_destroy_stacks (aTHX);
		754	}
		755
		756	static void
		757	free_coro_mortal (pTHX)
		758	{
		759	if (expect_true (coro_mortal))
		760	{
		761	SvREFCNT_dec (coro_mortal);
		762	coro_mortal = 0;
		763	}
		764	}
		765
		766	static int
		767	runops_trace (pTHX)
		768	{
		769	COP *oldcop = 0;
		770	int oldcxix = -2;
		771	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		772	coro_cctx *cctx = coro->cctx;
		773
		774	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		775	{
		776	PERL_ASYNC_CHECK ();
		777
		778	if (cctx->flags & CC_TRACE_ALL)
		779	{
		780	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		781	{
		782	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		783	SV bot, top;
		784	AV av = newAV (); / return values */
		785	SV **cb;
		786	dSP;
		787
		788	GV *gv = CvGV (cx->blk_sub.cv);
		789	SV *fullname = sv_2mortal (newSV (0));
		790	if (isGV (gv))
		791	gv_efullname3 (fullname, gv, 0);
		792
		793	bot = PL_stack_base + cx->blk_oldsp + 1;
		794	top = cx->blk_gimme == G_ARRAY ? SP + 1
		795	: cx->blk_gimme == G_SCALAR ? bot + 1
		796	: bot;
		797
		798	av_extend (av, top - bot);
		799	while (bot < top)
		800	av_push (av, SvREFCNT_inc (*bot++));
		801
		802	PL_runops = RUNOPS_DEFAULT;
		803	ENTER;
		804	SAVETMPS;
		805	EXTEND (SP, 3);
		806	PUSHMARK (SP);
		807	PUSHs (&PL_sv_no);
		808	PUSHs (fullname);
		809	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		810	PUTBACK;
		811	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		812	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		813	SPAGAIN;
		814	FREETMPS;
		815	LEAVE;
		816	PL_runops = runops_trace;
		817	}
		818
		819	if (oldcop != PL_curcop)
		820	{
		821	oldcop = PL_curcop;
		822
		823	if (PL_curcop != &PL_compiling)
		824	{
		825	SV **cb;
		826
		827	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		828	{
		829	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		830
		831	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		832	{
		833	runops_proc_t old_runops = PL_runops;
		834	dSP;
		835	GV *gv = CvGV (cx->blk_sub.cv);
		836	SV *fullname = sv_2mortal (newSV (0));
		837
		838	if (isGV (gv))
		839	gv_efullname3 (fullname, gv, 0);
		840
		841	PL_runops = RUNOPS_DEFAULT;
		842	ENTER;
		843	SAVETMPS;
		844	EXTEND (SP, 3);
		845	PUSHMARK (SP);
		846	PUSHs (&PL_sv_yes);
		847	PUSHs (fullname);
		848	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		849	PUTBACK;
		850	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		851	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		852	SPAGAIN;
		853	FREETMPS;
		854	LEAVE;
		855	PL_runops = runops_trace;
		856	}
		857
		858	oldcxix = cxstack_ix;
		859	}
		860
		861	if (cctx->flags & CC_TRACE_LINE)
		862	{
		863	dSP;
		864
		865	PL_runops = RUNOPS_DEFAULT;
		866	ENTER;
		867	SAVETMPS;
		868	EXTEND (SP, 3);
		869	PL_runops = RUNOPS_DEFAULT;
		870	PUSHMARK (SP);
		871	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		872	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		873	PUTBACK;
		874	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		875	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		876	SPAGAIN;
		877	FREETMPS;
		878	LEAVE;
		879	PL_runops = runops_trace;
		880	}
		881	}
		882	}
		883	}
		884	}
		885
		886	TAINT_NOT;
		887	return 0;
		888	}
		889
		890	/* inject a fake call to Coro::State::_cctx_init into the execution */
		891	/* _cctx_init should be careful, as it could be called at almost any time */
		892	/* during execution of a perl program */
		893	static void NOINLINE
		894	cctx_prepare (pTHX_ coro_cctx *cctx)
		895	{
543	dSP;	896	dSP;
544	UNOP myop;	897	LOGOP myop;
545	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
546		898
547	coro_init_stacks (aTHX);	899	PL_top_env = &PL_start_env;
548	/PL_curcop = 0;/
549	/PL_in_eval = PL_in_eval;/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		900
553	SPAGAIN;	901	if (cctx->flags & CC_TRACE)
		902	PL_runops = runops_trace;
554		903
555	Zero (&myop, 1, UNOP);	904	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	905	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	906	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
558		907
		908	PUSHMARK (SP);
		909	EXTEND (SP, 2);
		910	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		911	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		912	PUTBACK;
559	PL_op = (OP *)&myop;	913	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	914	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	915	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	916	}
569		917
		918	/*
		919	* this is a _very_ stripped down perl interpreter ;)
		920	*/
570	static void	921	static void
571	transfer_tail ()	922	cctx_run (void *arg)
572	{	923	{
573	if (coro_mortal)	924	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		925
		926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	927	UNLOCK;
580	}
581		928
582	static void	929	/* we now skip the entersub that lead to transfer() */
583	coro_run (void *arg)	930	PL_op = PL_op->op_next;
584	{	931
		932	/* inject a fake subroutine call to cctx_init */
		933	cctx_prepare (aTHX_ (coro_cctx *)arg);
		934
		935	/* somebody or something will hit me for both perl_run and PL_restartop */
		936	PL_restartop = PL_op;
		937	perl_run (PL_curinterp);
		938
585	/*	939	/*
586	* this is a _very_ stripped down perl interpreter ;)	940	* If perl-run returns we assume exit() was being called or the coro
		941	* fell off the end, which seems to be the only valid (non-bug)
		942	* reason for perl_run to return. We try to exit by jumping to the
		943	* bootstrap-time "top" top_env, as we cannot restore the "main"
		944	* coroutine as Coro has no such concept
587	*/	945	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	946	PL_top_env = main_top_env;
593	PL_restartop = PL_op->op_next;	947	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	/* somebody will hit me for both perl_run and PL_restart_top */
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}	948	}
599		949
600	static coro_stack *	950	static coro_cctx *
601	stack_new ()	951	cctx_new ()
602	{	952	{
603	coro_stack *stack;	953	coro_cctx *cctx;
		954	void *stack_start;
		955	size_t stack_size;
604		956
		957	++cctx_count;
		958
605	New (0, stack, 1, coro_stack);	959	Newz (0, cctx, 1, coro_cctx);
606		960
607	#if HAVE_MMAP	961	#if HAVE_MMAP
608		962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	963	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
611		965
612	if (stack->sptr == (void *)-1)	966	if (cctx->sptr != (void *)-1)
		967	{
		968	# if CORO_STACKGUARD
		969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags \|= CC_MAPPED;
613	{	974	}
		975	else
		976	#endif
		977	{
		978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
		980
		981	if (!cctx->sptr)
		982	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	983	perror ("FATAL: unable to allocate stack for coroutine");
615	_exit (EXIT_FAILURE);	984	_exit (EXIT_FAILURE);
		985	}
		986
		987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
		990
		991	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		992	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		993
		994	return cctx;
		995	}
		996
		997	static void
		998	cctx_destroy (coro_cctx *cctx)
		999	{
		1000	if (!cctx)
		1001	return;
		1002
		1003	--cctx_count;
		1004
		1005	#if CORO_USE_VALGRIND
		1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1007	#endif
		1008
		1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
		1011	munmap (cctx->sptr, cctx->ssize);
		1012	else
		1013	#endif
		1014	Safefree (cctx->sptr);
		1015
		1016	Safefree (cctx);
		1017	}
		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1021
		1022	static coro_cctx *
		1023	cctx_get (pTHX)
		1024	{
		1025	while (expect_true (cctx_first))
616	}	1026	{
		1027	coro_cctx *cctx = cctx_first;
		1028	cctx_first = cctx->next;
		1029	--cctx_idle;
617		1030
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1031	if (expect_true (!CCTX_EXPIRED (cctx)))
		1032	return cctx;
619		1033
		1034	cctx_destroy (cctx);
		1035	}
		1036
		1037	return cctx_new ();
		1038	}
		1039
		1040	static void
		1041	cctx_put (coro_cctx *cctx)
		1042	{
		1043	/* free another cctx if overlimit */
		1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1045	{
		1046	coro_cctx *first = cctx_first;
		1047	cctx_first = first->next;
		1048	--cctx_idle;
		1049
		1050	cctx_destroy (first);
		1051	}
		1052
		1053	++cctx_idle;
		1054	cctx->next = cctx_first;
		1055	cctx_first = cctx;
		1056	}
		1057
		1058	/ coroutine switching ***************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro prev, struct coro next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
620	#else	1077	#else
621		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
622	stack->ssize = STACKSIZE * (long)sizeof (long);	1079	#endif
623	New (0, stack->sptr, STACKSIZE, long);	1080	)
624		1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
625	if (!stack->sptr)
626	{	1082	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630
631	#endif
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);
634
635	return stack;
636	}	1083	}
637		1084
638	static void	1085	/* always use the TRANSFER macro */
639	stack_free (coro_stack *stack)	1086	static void NOINLINE
640	{
641	if (!stack \|\| stack == main_stack)
642	return;
643
644	#if HAVE_MMAP
645	munmap (stack->sptr, stack->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static void
656	stack_get (struct coro *coro)
657	{
658	if (stack_first)
659	{
660	coro->stack = stack_first;
661	stack_first = stack_first->next;
662	}
663	else
664	coro->stack = stack_new ();
665	}
666
667	static void
668	stack_put (coro_stack *stack)
669	{
670	stack->next = stack_first;
671	stack_first = stack;
672	}
673
674	/* never call directly, always through the coro_state_transfer global variable */
675	static void
676	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	1087	transfer (pTHX_ struct coro prev, struct coro next)
677	{	1088	{
678	dSTACKLEVEL;	1089	dSTACKLEVEL;
679		1090
680	/* sometimes transfer is only called to set idle_sp */	1091	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	1092	if (expect_false (!next))
682	prev->stack->idle_sp = stacklevel;	1093	{
683		1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	1095	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
685
686	if (prev != next)
687	{	1096	}
688	coro_stack *prev_stack = prev->stack;	1097	else if (expect_true (prev != next))
		1098	{
		1099	coro_cctx *prev__cctx;
689		1100
690	/* possibly "free" the stack */	1101	if (expect_false (prev->flags & CF_NEW))
691	if (prev_stack->idle_sp == stacklevel)
692	{	1102	{
693	stack_put (prev_stack);	1103	/* create a new empty context */
694	prev->stack = 0;	1104	Newz (0, prev->cctx, 1, coro_cctx);
		1105	prev->flags &= ~CF_NEW;
		1106	prev->flags \|= CF_RUNNING;
695	}	1107	}
696		1108
697	if (!next->mainstack)	1109	prev->flags &= ~CF_RUNNING;
		1110	next->flags \|= CF_RUNNING;
		1111
		1112	LOCK;
		1113
		1114	if (expect_false (next->flags & CF_NEW))
698	{	1115	{
		1116	/* need to start coroutine */
		1117	next->flags &= ~CF_NEW;
699	/* first get rid of the old state */	1118	/* first get rid of the old state */
700	SAVE (prev, -1);	1119	save_perl (aTHX_ prev);
701	/* setup coroutine call */	1120	/* setup coroutine call */
702	setup_coro (next);	1121	coro_setup (aTHX_ next);
703	next->stack = 0;
704	}	1122	}
705	else	1123	else
706	{	1124	{
707	SAVE (prev, flags);	1125	/* coroutine already started */
708	LOAD (next);	1126	save_perl (aTHX_ prev);
		1127	load_perl (aTHX_ next);
709	}	1128	}
710		1129
711	if (!next->stack)	1130	prev__cctx = prev->cctx;
712	stack_get (next);
713		1131
714	if (prev_stack != next->stack)	1132	/* possibly "free" the cctx */
		1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1134	{
		1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1137
		1138	prev->cctx = 0;
		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	if (!next->cctx)
		1144	next->cctx = cctx_get (aTHX);
		1145
		1146	cctx_put (prev__cctx);
		1147	}
		1148
		1149	++next->usecount;
		1150
		1151	if (expect_true (!next->cctx))
		1152	next->cctx = cctx_get (aTHX);
		1153
		1154	if (expect_false (prev__cctx != next->cctx))
		1155	{
		1156	prev__cctx->top_env = PL_top_env;
		1157	PL_top_env = next->cctx->top_env;
715	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1158	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
716	}	1159	}
717		1160
718	transfer_tail ();	1161	free_coro_mortal (aTHX);
719	}	1162	UNLOCK;
720		1163
721	/* use this function pointer to call the above function */	1164	if (expect_false (prev->throw \|\| next->throw))
722	/* this is done to increase chances of the compiler not inlining the call */	1165	{
723	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	1166	struct coro *coro = SvSTATE (coro_current);
724		1167
		1168	if (coro->throw)
		1169	{
		1170	SV *exception = coro->throw;
		1171	coro->throw = 0;
		1172	sv_setsv (ERRSV, exception);
		1173	croak (0);
		1174	}
		1175	}
		1176	}
		1177	}
		1178
		1179	struct transfer_args
		1180	{
		1181	struct coro prev, next;
		1182	};
		1183
		1184	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1185	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1186
		1187	/ high level stuff ******************************************************/
		1188
725	static void	1189	static int
726	coro_state_destroy (struct coro *coro)	1190	coro_state_destroy (pTHX_ struct coro *coro)
727	{	1191	{
728	if (coro->refcnt--)	1192	if (coro->flags & CF_DESTROYED)
729	return;	1193	return 0;
		1194
		1195	coro->flags \|= CF_DESTROYED;
		1196
		1197	if (coro->flags & CF_READY)
		1198	{
		1199	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1200	/* alternative: look through all ready queues and remove the coro */
		1201	LOCK;
		1202	--coro_nready;
		1203	UNLOCK;
		1204	}
		1205	else
		1206	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
730		1207
731	if (coro->mainstack && coro->mainstack != main_mainstack)	1208	if (coro->mainstack && coro->mainstack != main_mainstack)
732	{	1209	{
733	struct coro temp;	1210	struct coro temp;
734		1211
735	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1212	if (coro->flags & CF_RUNNING)
		1213	croak ("FATAL: tried to destroy currently running coroutine");
		1214
		1215	save_perl (aTHX_ &temp);
736	LOAD (aTHX_ coro);	1216	load_perl (aTHX_ coro);
737		1217
738	destroy_stacks (aTHX);	1218	coro_destroy (aTHX_ coro);
739		1219
740	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1220	load_perl (aTHX_ &temp);
741		1221
742	coro->mainstack = 0;	1222	coro->slot = 0;
743	}	1223	}
744		1224
745	stack_free (coro->stack);	1225	cctx_destroy (coro->cctx);
746	SvREFCNT_dec (coro->args);	1226	SvREFCNT_dec (coro->args);
747	Safefree (coro);	1227
		1228	if (coro->next) coro->next->prev = coro->prev;
		1229	if (coro->prev) coro->prev->next = coro->next;
		1230	if (coro == coro_first) coro_first = coro->next;
		1231
		1232	return 1;
748	}	1233	}
749		1234
750	static int	1235	static int
751	coro_state_clear (SV sv, MAGIC mg)	1236	coro_state_free (pTHX_ SV sv, MAGIC mg)
752	{	1237	{
753	struct coro coro = (struct coro )mg->mg_ptr;	1238	struct coro coro = (struct coro )mg->mg_ptr;
754	mg->mg_ptr = 0;	1239	mg->mg_ptr = 0;
755		1240
		1241	coro->hv = 0;
		1242
		1243	if (--coro->refcnt < 0)
		1244	{
756	coro_state_destroy (coro);	1245	coro_state_destroy (aTHX_ coro);
		1246	Safefree (coro);
		1247	}
757		1248
758	return 0;	1249	return 0;
759	}	1250	}
760		1251
761	static int	1252	static int
762	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1253	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
763	{	1254	{
764	struct coro coro = (struct coro )mg->mg_ptr;	1255	struct coro coro = (struct coro )mg->mg_ptr;
765		1256
766	++coro->refcnt;	1257	++coro->refcnt;
767		1258
768	return 0;	1259	return 0;
769	}	1260	}
770		1261
771	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1262	static MGVTBL coro_state_vtbl = {
		1263	0, 0, 0, 0,
		1264	coro_state_free,
		1265	0,
		1266	#ifdef MGf_DUP
		1267	coro_state_dup,
		1268	#else
		1269	# define MGf_DUP 0
		1270	#endif
		1271	};
772		1272
773	static struct coro *
774	SvSTATE (SV *coro)
775	{
776	HV *stash;
777	MAGIC *mg;
778
779	if (SvROK (coro))
780	coro = SvRV (coro);
781
782	stash = SvSTASH (coro);
783	if (stash != coro_stash && stash != coro_state_stash)
784	{
785	/* very slow, but rare, check */
786	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
787	croak ("Coro::State object required");
788	}
789
790	mg = SvMAGIC (coro);
791	assert (mg->mg_type == PERL_MAGIC_ext);
792	return (struct coro *)mg->mg_ptr;
793	}
794
795	static void	1273	static void
		1274	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1275	{
		1276	ta->prev = SvSTATE (prev_sv);
		1277	ta->next = SvSTATE (next_sv);
		1278	TRANSFER_CHECK (*ta);
		1279	}
		1280
		1281	static void
796	api_transfer (pTHX_ SV prev, SV next, int flags)	1282	api_transfer (SV prev_sv, SV next_sv)
797	{	1283	{
798	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1284	dTHX;
		1285	struct transfer_args ta;
		1286
		1287	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1288	TRANSFER (ta);
799	}	1289	}
800		1290
801	/ Coro ******************************************************************/	1291	/ Coro ******************************************************************/
802		1292
803	#define PRIO_MAX 3
804	#define PRIO_HIGH 1
805	#define PRIO_NORMAL 0
806	#define PRIO_LOW -1
807	#define PRIO_IDLE -3
808	#define PRIO_MIN -4
809
810	/* for Coro.pm */
811	static GV coro_current, coro_idle;
812	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;
814
815	static void	1293	static void
816	coro_enq (pTHX_ SV *sv)	1294	coro_enq (pTHX_ SV *coro_sv)
817	{	1295	{
818	int prio;
819
820	if (SvTYPE (sv) != SVt_PVHV)
821	croak ("Coro::ready tried to enqueue something that is not a coroutine");
822
823	prio = SvSTATE (sv)->prio;
824
825	av_push (coro_ready [prio - PRIO_MIN], sv);	1296	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
826	coro_nready++;
827	}	1297	}
828		1298
829	static SV *	1299	static SV *
830	coro_deq (pTHX_ int min_prio)	1300	coro_deq (pTHX_ int min_prio)
831	{	1301	{
…		…
835	if (min_prio < 0)	1305	if (min_prio < 0)
836	min_prio = 0;	1306	min_prio = 0;
837		1307
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1308	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (AvFILLp (coro_ready [prio]) >= 0)	1309	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready [prio]);	1310	return av_shift (coro_ready [prio]);
843	}
844		1311
845	return 0;	1312	return 0;
846	}	1313	}
847		1314
848	static void	1315	static int
849	api_ready (SV *coro)	1316	api_ready (SV *coro_sv)
850	{	1317	{
851	dTHX;	1318	dTHX;
		1319	struct coro *coro;
852		1320
853	if (SvROK (coro))	1321	if (SvROK (coro_sv))
854	coro = SvRV (coro);	1322	coro_sv = SvRV (coro_sv);
		1323
		1324	coro = SvSTATE (coro_sv);
		1325
		1326	if (coro->flags & CF_READY)
		1327	return 0;
		1328
		1329	coro->flags \|= CF_READY;
855		1330
856	LOCK;	1331	LOCK;
857	coro_enq (aTHX_ SvREFCNT_inc (coro));	1332	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1333	++coro_nready;
858	UNLOCK;	1334	UNLOCK;
		1335
		1336	return 1;
		1337	}
		1338
		1339	static int
		1340	api_is_ready (SV *coro_sv)
		1341	{
		1342	dTHX;
		1343	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1344	}
		1345
		1346	static void
		1347	prepare_schedule (pTHX_ struct transfer_args *ta)
		1348	{
		1349	SV prev_sv, next_sv;
		1350
		1351	for (;;)
		1352	{
		1353	LOCK;
		1354	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1355
		1356	/* nothing to schedule: call the idle handler */
		1357	if (expect_false (!next_sv))
		1358	{
		1359	dSP;
		1360	UNLOCK;
		1361
		1362	ENTER;
		1363	SAVETMPS;
		1364
		1365	PUSHMARK (SP);
		1366	PUTBACK;
		1367	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1368
		1369	FREETMPS;
		1370	LEAVE;
		1371	continue;
		1372	}
		1373
		1374	ta->next = SvSTATE (next_sv);
		1375
		1376	/* cannot transfer to destroyed coros, skip and look for next */
		1377	if (expect_false (ta->next->flags & CF_DESTROYED))
		1378	{
		1379	UNLOCK;
		1380	SvREFCNT_dec (next_sv);
		1381	/* coro_nready is already taken care of by destroy */
		1382	continue;
		1383	}
		1384
		1385	--coro_nready;
		1386	UNLOCK;
		1387	break;
		1388	}
		1389
		1390	/* free this only after the transfer */
		1391	prev_sv = SvRV (coro_current);
		1392	ta->prev = SvSTATE (prev_sv);
		1393	TRANSFER_CHECK (*ta);
		1394	assert (ta->next->flags & CF_READY);
		1395	ta->next->flags &= ~CF_READY;
		1396	SvRV_set (coro_current, next_sv);
		1397
		1398	LOCK;
		1399	free_coro_mortal (aTHX);
		1400	coro_mortal = prev_sv;
		1401	UNLOCK;
		1402	}
		1403
		1404	static void
		1405	prepare_cede (pTHX_ struct transfer_args *ta)
		1406	{
		1407	api_ready (coro_current);
		1408	prepare_schedule (aTHX_ ta);
		1409	}
		1410
		1411	static int
		1412	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1413	{
		1414	if (coro_nready)
		1415	{
		1416	SV *prev = SvRV (coro_current);
		1417	prepare_schedule (aTHX_ ta);
		1418	api_ready (prev);
		1419	return 1;
		1420	}
		1421	else
		1422	return 0;
859	}	1423	}
860		1424
861	static void	1425	static void
862	api_schedule (void)	1426	api_schedule (void)
863	{	1427	{
864	dTHX;	1428	dTHX;
		1429	struct transfer_args ta;
865		1430
866	SV prev, next;	1431	prepare_schedule (aTHX_ &ta);
867	SV *current = GvSV (coro_current);	1432	TRANSFER (ta);
868
869	for (;;)
870	{
871	LOCK;
872
873	next = coro_deq (aTHX_ PRIO_MIN);
874
875	if (next)
876	break;
877
878	UNLOCK;
879
880	{
881	dSP;
882
883	ENTER;
884	SAVETMPS;
885
886	PUSHMARK (SP);
887	PUTBACK;
888	call_sv (GvSV (coro_idle), G_DISCARD);
889
890	FREETMPS;
891	LEAVE;
892	}
893	}
894
895	prev = SvRV (current);
896	SvRV (current) = next;
897
898	/* free this only after the transfer */
899	coro_mortal = prev;
900
901	UNLOCK;
902
903	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
904	}	1433	}
905		1434
906	static int coro_cede_self;
907
908	static void	1435	static int
909	api_cede (void)	1436	api_cede (void)
910	{	1437	{
911	dTHX;	1438	dTHX;
912	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1439	struct transfer_args ta;
913		1440
914	LOCK;	1441	prepare_cede (aTHX_ &ta);
915		1442
916	if (coro_cede_self)	1443	if (expect_true (ta.prev != ta.next))
917	{	1444	{
918	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];	1445	TRANSFER (ta);
919	av_unshift (runqueue, 1);	1446	return 1;
920	av_store (runqueue, 0, current);
921	coro_nready++;
922	coro_cede_self = 0;
923	}	1447	}
924	else	1448	else
925	coro_enq (aTHX_ current);	1449	return 0;
926
927	UNLOCK;
928
929	api_schedule ();
930	}	1450	}
931		1451
		1452	static int
		1453	api_cede_notself (void)
		1454	{
		1455	dTHX;
		1456	struct transfer_args ta;
		1457
		1458	if (prepare_cede_notself (aTHX_ &ta))
		1459	{
		1460	TRANSFER (ta);
		1461	return 1;
		1462	}
		1463	else
		1464	return 0;
		1465	}
		1466
		1467	static void
		1468	api_trace (SV *coro_sv, int flags)
		1469	{
		1470	dTHX;
		1471	struct coro *coro = SvSTATE (coro_sv);
		1472
		1473	if (flags & CC_TRACE)
		1474	{
		1475	if (!coro->cctx)
		1476	coro->cctx = cctx_new ();
		1477	else if (!(coro->cctx->flags & CC_TRACE))
		1478	croak ("cannot enable tracing on coroutine with custom stack");
		1479
		1480	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1481	}
		1482	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1483	{
		1484	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1485
		1486	if (coro->flags & CF_RUNNING)
		1487	PL_runops = RUNOPS_DEFAULT;
		1488	else
		1489	coro->slot->runops = RUNOPS_DEFAULT;
		1490	}
		1491	}
		1492
932	MODULE = Coro::State PACKAGE = Coro::State	1493	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
933		1494
934	PROTOTYPES: DISABLE	1495	PROTOTYPES: DISABLE
935		1496
936	BOOT:	1497	BOOT:
937	{	1498	{
938	#ifdef USE_ITHREADS	1499	#ifdef USE_ITHREADS
939	MUTEX_INIT (&coro_mutex);	1500	MUTEX_INIT (&coro_mutex);
940	#endif	1501	#endif
941	BOOT_PAGESIZE;	1502	BOOT_PAGESIZE;
942		1503
		1504	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1505	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1506
		1507	hv_sig = coro_get_hv ("SIG", TRUE);
		1508	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1509	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1510
		1511	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1512	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1513
943	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1514	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
944		1515
945	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
946	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
947	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1519	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
948		1520
949	main_mainstack = PL_mainstack;	1521	main_mainstack = PL_mainstack;
		1522	main_top_env = PL_top_env;
		1523
		1524	while (main_top_env->je_prev)
		1525	main_top_env = main_top_env->je_prev;
950		1526
951	coroapi.ver = CORO_API_VERSION;	1527	coroapi.ver = CORO_API_VERSION;
952	coroapi.transfer = api_transfer;	1528	coroapi.transfer = api_transfer;
953
954	Newz (0, main_stack, 1, coro_stack);
955	main_stack->idle_sp = (void *)-1;
956		1529
957	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1530	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
958	}	1531	}
959		1532
960	SV *	1533	SV *
…		…
964	struct coro *coro;	1537	struct coro *coro;
965	HV *hv;	1538	HV *hv;
966	int i;	1539	int i;
967		1540
968	Newz (0, coro, 1, struct coro);	1541	Newz (0, coro, 1, struct coro);
969	coro->args = newAV ();	1542	coro->args = newAV ();
		1543	coro->flags = CF_NEW;
970		1544
		1545	if (coro_first) coro_first->prev = coro;
		1546	coro->next = coro_first;
		1547	coro_first = coro;
		1548
971	hv = newHV ();	1549	coro->hv = hv = newHV ();
972	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1550	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
973	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1551	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
974		1552
975	av_push (coro->args, newSVsv (RETVAL));	1553	av_extend (coro->args, items - 1);
976	for (i = 1; i < items; i++)	1554	for (i = 1; i < items; i++)
977	av_push (coro->args, newSVsv (ST (i)));	1555	av_push (coro->args, newSVsv (ST (i)));
978
979	coro->stack = main_stack;
980	/coro->mainstack = 0; //actual work is done inside transfer /
981	/coro->stack = 0;/
982	}	1556	}
983	OUTPUT:	1557	OUTPUT:
984	RETVAL	1558	RETVAL
985		1559
		1560	# these not obviously related functions are all rolled into the same xs
		1561	# function to increase chances that they all will call transfer with the same
		1562	# stack offset
986	void	1563	void
987	transfer (prev, next, flags)	1564	_set_stacklevel (...)
988	SV *prev	1565	ALIAS:
989	SV *next	1566	Coro::State::transfer = 1
990	int flags	1567	Coro::schedule = 2
		1568	Coro::cede = 3
		1569	Coro::cede_notself = 4
		1570	Coro::Event::next = 5
		1571	Coro::Event::next_cancel = 6
991	CODE:	1572	PPCODE:
992	PUTBACK;
993	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
994	SPAGAIN;
995
996	int
997	prio (Coro::State coro, int newprio = 0)
998	ALIAS:
999	nice = 1
1000	CODE:
1001	{	1573	{
1002	RETVAL = coro->prio;	1574	struct transfer_args ta;
		1575	int again = 0;
1003		1576
1004	if (items > 1)	1577	do
1005	{	1578	{
1006	if (ix)	1579	switch (ix)
1007	newprio += coro->prio;	1580	{
		1581	case 0:
		1582	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1583	ta.next = 0;
		1584	break;
1008		1585
1009	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1586	case 1:
1010	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1587	if (items != 2)
		1588	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1011		1589
1012	coro->prio = newprio;	1590	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1591	break;
		1592
		1593	case 2:
		1594	prepare_schedule (aTHX_ &ta);
		1595	break;
		1596
		1597	case 3:
		1598	prepare_cede (aTHX_ &ta);
		1599	break;
		1600
		1601	case 4:
		1602	if (!prepare_cede_notself (aTHX_ &ta))
		1603	XSRETURN_EMPTY;
		1604
		1605	break;
		1606
		1607	case 5:
		1608	case 6:
		1609	if (items != 1)
		1610	croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
		1611
		1612	{
		1613	SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
		1614
		1615	if (ev)
		1616	{
		1617	if (GIMME_V != G_VOID)
		1618	{
		1619	XPUSHs (ev);
		1620	XSRETURN (1);
		1621	}
		1622	else
		1623	XSRETURN_EMPTY;
		1624	}
		1625	}
		1626
		1627	prepare_schedule (aTHX_ &ta);
		1628	again = 1;
		1629	break;
		1630	}
		1631
		1632	BARRIER;
		1633	TRANSFER (ta);
		1634	BARRIER;
1013	}	1635	}
1014	}	1636	while (again);
1015		1637
1016	void	1638	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1017	_clear_idle_sp (Coro::State self)	1639	XSRETURN_YES;
		1640
		1641	XSRETURN_EMPTY; /* not understood why this is necessary, likely some stack handling bug */
		1642
		1643	bool
		1644	_destroy (SV *coro_sv)
1018	CODE:	1645	CODE:
1019	self->stack->idle_sp = 0;	1646	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1020		1647	OUTPUT:
1021	void	1648	RETVAL
1022	_clone_state_from (SV dst, SV src)
1023	CODE:
1024	{
1025	struct coro *coro_src = SvSTATE (src);
1026
1027	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028
1029	++coro_src->refcnt;
1030	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1031	}
1032		1649
1033	void	1650	void
1034	_exit (code)	1651	_exit (code)
1035	int code	1652	int code
1036	PROTOTYPE: $	1653	PROTOTYPE: $
1037	CODE:	1654	CODE:
1038	_exit (code);	1655	_exit (code);
1039		1656
1040	MODULE = Coro::State PACKAGE = Coro::Cont	1657	int
		1658	cctx_stacksize (int new_stacksize = 0)
		1659	CODE:
		1660	RETVAL = coro_stacksize;
		1661	if (new_stacksize)
		1662	coro_stacksize = new_stacksize;
		1663	OUTPUT:
		1664	RETVAL
		1665
		1666	int
		1667	cctx_count ()
		1668	CODE:
		1669	RETVAL = cctx_count;
		1670	OUTPUT:
		1671	RETVAL
		1672
		1673	int
		1674	cctx_idle ()
		1675	CODE:
		1676	RETVAL = cctx_idle;
		1677	OUTPUT:
		1678	RETVAL
1041		1679
1042	void	1680	void
1043	yield (...)	1681	list ()
1044	PROTOTYPE: @	1682	PPCODE:
		1683	{
		1684	struct coro *coro;
		1685	for (coro = coro_first; coro; coro = coro->next)
		1686	if (coro->hv)
		1687	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1688	}
		1689
		1690	void
		1691	call (Coro::State coro, SV *coderef)
		1692	ALIAS:
		1693	eval = 1
		1694	CODE:
		1695	{
		1696	if (coro->mainstack)
		1697	{
		1698	struct coro temp;
		1699
		1700	if (!(coro->flags & CF_RUNNING))
		1701	{
		1702	save_perl (aTHX_ &temp);
		1703	load_perl (aTHX_ coro);
		1704	}
		1705
		1706	{
		1707	dSP;
		1708	ENTER;
		1709	SAVETMPS;
		1710	PUTBACK;
		1711	PUSHSTACK;
		1712	PUSHMARK (SP);
		1713
		1714	if (ix)
		1715	eval_sv (coderef, 0);
		1716	else
		1717	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1718
		1719	POPSTACK;
		1720	FREETMPS;
		1721	LEAVE;
		1722	}
		1723
		1724	if (!(coro->flags & CF_RUNNING))
		1725	{
		1726	save_perl (aTHX_ coro);
		1727	load_perl (aTHX_ &temp);
		1728	}
		1729	}
		1730	}
		1731
		1732	SV *
		1733	is_ready (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	is_ready = CF_READY
		1737	is_running = CF_RUNNING
		1738	is_new = CF_NEW
		1739	is_destroyed = CF_DESTROYED
		1740	CODE:
		1741	RETVAL = boolSV (coro->flags & ix);
		1742	OUTPUT:
		1743	RETVAL
		1744
		1745	void
		1746	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1747
		1748	SV *
		1749	has_stack (Coro::State coro)
		1750	PROTOTYPE: $
		1751	CODE:
		1752	RETVAL = boolSV (!!coro->cctx);
		1753	OUTPUT:
		1754	RETVAL
		1755
		1756	int
		1757	is_traced (Coro::State coro)
		1758	PROTOTYPE: $
		1759	CODE:
		1760	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1761	OUTPUT:
		1762	RETVAL
		1763
		1764	IV
		1765	rss (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	usecount = 1
1045	CODE:	1769	CODE:
1046	{	1770	switch (ix)
1047	SV *yieldstack;	1771	{
1048	SV *sv;	1772	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1049	AV *defav = GvAV (PL_defgv);	1773	case 1: RETVAL = coro->usecount; break;
1050	struct coro prev, next;
1051
1052	yieldstack = *hv_fetch (
1053	(HV *)SvRV (GvSV (coro_current)),
1054	"yieldstack", sizeof ("yieldstack") - 1,
1055	0	1774	}
1056	);	1775	OUTPUT:
		1776	RETVAL
1057		1777
1058	/* set up @_ -- ugly */
1059	av_clear (defav);
1060	av_fill (defav, items - 1);
1061	while (items--)
1062	av_store (defav, items, SvREFCNT_inc (ST(items)));
1063
1064	sv = av_pop ((AV *)SvRV (yieldstack));
1065	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1066	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1067	SvREFCNT_dec (sv);
1068
1069	coro_state_transfer (aTHX_ prev, next, 0);
1070	}
1071		1778
1072	MODULE = Coro::State PACKAGE = Coro	1779	MODULE = Coro::State PACKAGE = Coro
1073		1780
1074	BOOT:	1781	BOOT:
1075	{	1782	{
1076	int i;	1783	int i;
1077		1784
		1785	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1786	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1787	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1788
		1789	coro_current = coro_get_sv ("Coro::current", FALSE);
		1790	SvREADONLY_on (coro_current);
		1791
1078	coro_stash = gv_stashpv ("Coro", TRUE);	1792	coro_stash = gv_stashpv ("Coro", TRUE);
1079		1793
1080	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1794	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1795	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1796	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1797	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1798	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1799	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086		1800
1087	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1088	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1089
1090	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1801	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091	coro_ready[i] = newAV ();	1802	coro_ready[i] = newAV ();
1092		1803
1093	{	1804	{
1094	SV *sv = perl_get_sv("Coro::API", 1);	1805	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1806	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1095		1807
1096	coroapi.schedule = api_schedule;	1808	coroapi.schedule = api_schedule;
1097	coroapi.cede = api_cede;	1809	coroapi.cede = api_cede;
		1810	coroapi.cede_notself = api_cede_notself;
1098	coroapi.ready = api_ready;	1811	coroapi.ready = api_ready;
		1812	coroapi.is_ready = api_is_ready;
1099	coroapi.nready = &coro_nready;	1813	coroapi.nready = &coro_nready;
1100	coroapi.current = coro_current;	1814	coroapi.current = coro_current;
1101		1815
1102	GCoroAPI = &coroapi;	1816	GCoroAPI = &coroapi;
1103	sv_setiv (sv, (IV)&coroapi);	1817	sv_setiv (sv, (IV)&coroapi);
1104	SvREADONLY_on (sv);	1818	SvREADONLY_on (sv);
1105	}	1819	}
1106	}	1820	}
1107		1821
1108	void	1822	void
		1823	_set_current (SV *current)
		1824	PROTOTYPE: $
		1825	CODE:
		1826	SvREFCNT_dec (SvRV (coro_current));
		1827	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1828
		1829	int
		1830	prio (Coro::State coro, int newprio = 0)
		1831	ALIAS:
		1832	nice = 1
		1833	CODE:
		1834	{
		1835	RETVAL = coro->prio;
		1836
		1837	if (items > 1)
		1838	{
		1839	if (ix)
		1840	newprio = coro->prio - newprio;
		1841
		1842	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1843	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1844
		1845	coro->prio = newprio;
		1846	}
		1847	}
		1848	OUTPUT:
		1849	RETVAL
		1850
		1851	SV *
1109	ready (SV *self)	1852	ready (SV *self)
1110	PROTOTYPE: $	1853	PROTOTYPE: $
1111	CODE:	1854	CODE:
1112	api_ready (self);	1855	RETVAL = boolSV (api_ready (self));
		1856	OUTPUT:
		1857	RETVAL
1113		1858
1114	int	1859	int
1115	nready (...)	1860	nready (...)
1116	PROTOTYPE:	1861	PROTOTYPE:
1117	CODE:	1862	CODE:
1118	RETVAL = coro_nready;	1863	RETVAL = coro_nready;
1119	OUTPUT:	1864	OUTPUT:
1120	RETVAL	1865	RETVAL
1121		1866
1122	void	1867	void
1123	schedule (...)	1868	throw (Coro::State self, SV *throw = &PL_sv_undef)
1124	PROTOTYPE:	1869	PROTOTYPE: $;$
		1870	CODE:
		1871	SvREFCNT_dec (self->throw);
		1872	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1873
		1874	# for async_pool speedup
		1875	void
		1876	_pool_1 (SV *cb)
1125	CODE:	1877	CODE:
1126	api_schedule ();	1878	{
		1879	struct coro *coro = SvSTATE (coro_current);
		1880	HV hv = (HV )SvRV (coro_current);
		1881	AV *defav = GvAV (PL_defgv);
		1882	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1883	AV *invoke_av;
		1884	int i, len;
		1885
		1886	if (!invoke)
		1887	croak ("\3async_pool terminate\2\n");
		1888
		1889	SvREFCNT_dec (coro->saved_deffh);
		1890	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1891
		1892	hv_store (hv, "desc", sizeof ("desc") - 1,
		1893	newSVpvn (strpair ("[async_pool]")), 0);
		1894
		1895	invoke_av = (AV *)SvRV (invoke);
		1896	len = av_len (invoke_av);
		1897
		1898	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1899
		1900	if (len > 0)
		1901	{
		1902	av_fill (defav, len - 1);
		1903	for (i = 0; i < len; ++i)
		1904	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1905	}
		1906
		1907	SvREFCNT_dec (invoke);
		1908	}
1127		1909
1128	void	1910	void
1129	_set_cede_self ()	1911	_pool_2 (SV *cb)
1130	CODE:	1912	CODE:
1131	coro_cede_self = 1;	1913	{
		1914	struct coro *coro = SvSTATE (coro_current);
1132		1915
1133	void	1916	sv_setsv (cb, &PL_sv_undef);
1134	cede (...)	1917
1135	PROTOTYPE:	1918	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
1136	CODE:	1919	coro->saved_deffh = 0;
1137	api_cede ();	1920
		1921	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1922	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1923	croak ("\3async_pool terminate\2\n");
		1924
		1925	av_clear (GvAV (PL_defgv));
		1926	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1927	newSVpvn (strpair ("[async_pool idle]")), 0);
		1928
		1929	coro->prio = 0;
		1930
		1931	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1932	api_trace (coro_current, 0);
		1933
		1934	av_push (av_async_pool, newSVsv (coro_current));
		1935	}
		1936
1138		1937
1139	MODULE = Coro::State PACKAGE = Coro::AIO	1938	MODULE = Coro::State PACKAGE = Coro::AIO
1140		1939
1141	SV *	1940	SV *
1142	_get_state ()	1941	_get_state ()
1143	CODE:	1942	CODE:
1144	{	1943	{
1145	struct {	1944	struct io_state *data;
1146	int errorno;
1147	int laststype;
1148	int laststatval;
1149	Stat_t statcache;
1150	} data;
1151		1945
		1946	RETVAL = newSV (sizeof (struct io_state));
		1947	data = (struct io_state *)SvPVX (RETVAL);
		1948	SvCUR_set (RETVAL, sizeof (struct io_state));
		1949	SvPOK_only (RETVAL);
		1950
1152	data.errorno = errno;	1951	data->errorno = errno;
1153	data.laststype = PL_laststype;	1952	data->laststype = PL_laststype;
1154	data.laststatval = PL_laststatval;	1953	data->laststatval = PL_laststatval;
1155	data.statcache = PL_statcache;	1954	data->statcache = PL_statcache;
1156
1157	RETVAL = newSVpvn ((char *)&data, sizeof data);
1158	}	1955	}
1159	OUTPUT:	1956	OUTPUT:
1160	RETVAL	1957	RETVAL
1161		1958
1162	void	1959	void
1163	_set_state (char *data_)	1960	_set_state (char *data_)
1164	PROTOTYPE: $	1961	PROTOTYPE: $
1165	CODE:	1962	CODE:
1166	{	1963	{
1167	struct {	1964	struct io_state data = (void )data_;
1168	int errorno;
1169	int laststype;
1170	int laststatval;
1171	Stat_t statcache;
1172	} data = (void )data_;
1173		1965
1174	errno = data->errorno;	1966	errno = data->errorno;
1175	PL_laststype = data->laststype;	1967	PL_laststype = data->laststype;
1176	PL_laststatval = data->laststatval;	1968	PL_laststatval = data->laststatval;
1177	PL_statcache = data->statcache;	1969	PL_statcache = data->statcache;
1178	}	1970	}
		1971

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Comparing Coro/Coro/State.xs (file contents): Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs. Revision 1.208 by root, Wed Oct 10 00:53:18 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs.
Revision 1.208 by root, Wed Oct 10 00:53:18 2007 UTC