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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.202 by root, Mon Oct 8 02:50:23 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? */
63	#define UCORO_STATE "_coro_state"	98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
64		101
65	/* 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
66	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
67	* and should be unique. */	104	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
69		106
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		108
72	#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))
73		123
74	#include "CoroAPI.h"	124	#include "CoroAPI.h"
75		125
76	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
…		…
80	#else	130	#else
81	# define LOCK (void)0	131	# define LOCK (void)0
82	# define UNLOCK (void)0	132	# define UNLOCK (void)0
83	#endif	133	#endif
84		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;
85	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
86	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;
87	static HV *coro_state_stash;	150	static HV coro_state_stash, coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV coro_mortal; / will be freed after next transfer */	151	static SV coro_mortal; / will be freed after next transfer */
91		152
92	/* this is actually not only 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 */
		178	typedef struct coro_cctx {
		179	struct coro_cctx *next;
		180
		181	/* the stack */
		182	void *sptr;
		183	size_t ssize;
		184
		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;
		189	coro_context cctx;
		190
		191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
		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 */
93	typedef struct {	205	typedef struct {
94	int refcnt; /* pointer reference counter */	206	SV *defsv;
95	int usecnt; /* shared by how many coroutines */	207	AV *defav;
96	int gencnt; /* generation counter */	208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
97		214
98	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99		216
100	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
101	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103
104	struct coro {	218	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	219	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	220	coro_cctx *cctx;
107		221
108	/* the optional C context */	222	/* process data */
109	coro_stack *stack;
110	void *cursp;
111	int gencnt;
112
113	/* optionally saved, might be zero */
114	AV *defav;
115	SV *defsv;
116	SV *errsv;
117
118	/* saved global state not related to stacks */
119	U8 dowarn;
120	I32 in_eval;
121
122	/* the stacks and related info (callchain etc..) */
123	PERL_SI *curstackinfo;
124	AV *curstack;
125	AV *mainstack;	223	AV *mainstack;
126	SV **stack_sp;	224	perl_slots slot; / basically the saved sp */
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152		225
153	/* data associated with this coroutine (initial args) */	226	/* data associated with this coroutine (initial args) */
154	AV *args;	227	AV *args;
		228	int refcnt;
		229	int flags; /* CF_ flags */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV *throw;
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro next, prev;
		243	HV hv; / the perl hash associated with this coro, if any */
155	};	244	};
156		245
157	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
159		248
		249	/ Coro ******************************************************************/
		250
		251	#define PRIO_MAX 3
		252	#define PRIO_HIGH 1
		253	#define PRIO_NORMAL 0
		254	#define PRIO_LOW -1
		255	#define PRIO_IDLE -3
		256	#define PRIO_MIN -4
		257
		258	/* for Coro.pm */
		259	static SV *coro_current;
		260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		261	static int coro_nready;
		262	static struct coro *coro_first;
		263
		264	/ lowlevel stuff ********************************************************/
		265
		266	static SV *
		267	coro_get_sv (const char *name, int create)
		268	{
		269	#if PERL_VERSION_ATLEAST (5,9,0)
		270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		271	get_sv (name, create);
		272	#endif
		273	return get_sv (name, create);
		274	}
		275
		276	static AV *
		277	coro_get_av (const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,9,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_av (name, create);
		282	#endif
		283	return get_av (name, create);
		284	}
		285
		286	static HV *
		287	coro_get_hv (const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,9,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_hv (name, create);
		292	#endif
		293	return get_hv (name, create);
		294	}
		295
160	static AV *	296	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	297	coro_clone_padlist (pTHX_ CV *cv)
162	{	298	{
163	AV *padlist = CvPADLIST (cv);	299	AV *padlist = CvPADLIST (cv);
164	AV newpadlist, newpad;	300	AV newpadlist, newpad;
165		301
166	newpadlist = newAV ();	302	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	303	AvREAL_off (newpadlist);
168	#if PERL_VERSION < 9	304	#if PERL_VERSION_ATLEAST (5,9,0)
		305	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		306	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172	#endif	308	#endif
173	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	309	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174	--AvFILLp (padlist);	310	--AvFILLp (padlist);
175		311
176	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	312	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
220		356
221	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define PERL_MAGIC_coro PERL_MAGIC_ext
222		358
223	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224		360
		361	#define CORO_MAGIC(cv) \
		362	SvMAGIC (cv) \
		363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		364	? SvMAGIC (cv) \
		365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		366	: 0
		367
		368	static struct coro *
		369	SvSTATE_ (pTHX_ SV *coro)
		370	{
		371	HV *stash;
		372	MAGIC *mg;
		373
		374	if (SvROK (coro))
		375	coro = SvRV (coro);
		376
		377	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		378	croak ("Coro::State object required");
		379
		380	stash = SvSTASH (coro);
		381	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		382	{
		383	/* very slow, but rare, check */
		384	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		385	croak ("Coro::State object required");
		386	}
		387
		388	mg = CORO_MAGIC (coro);
		389	return (struct coro *)mg->mg_ptr;
		390	}
		391
		392	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		393
225	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
226	static void	395	static void
227	get_padlist (pTHX_ CV *cv)	396	get_padlist (pTHX_ CV *cv)
228	{	397	{
229	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
230		400
231	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
232	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233	else	403	else
234	{	404	{
235	#if 0	405	#if CORO_PREFER_PERL_FUNCTIONS
236	/* this should work - but it doesn't :( */	406	/* this is probably cleaner, but also slower? */
237	CV *cp = Perl_cv_clone (aTHX_ cv);	407	CV *cp = Perl_cv_clone (cv);
238	CvPADLIST (cv) = CvPADLIST (cp);	408	CvPADLIST (cv) = CvPADLIST (cp);
239	CvPADLIST (cp) = 0;	409	CvPADLIST (cp) = 0;
240	SvREFCNT_dec (cp);	410	SvREFCNT_dec (cp);
241	#else	411	#else
242	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
245	}	415	}
246		416
247	static void	417	static void
248	put_padlist (pTHX_ CV *cv)	418	put_padlist (pTHX_ CV *cv)
249	{	419	{
250	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	420	MAGIC *mg = CORO_MAGIC (cv);
		421	AV *av;
251		422
252	if (!mg)	423	if (expect_false (!mg))
253	{	424	{
254	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
257	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
258	}	429	}
259		430
260	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	431	av = (AV *)mg->mg_obj;
261	}
262		432
263	#define SB do {	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
264	#define SE } while (0)	434	av_extend (av, AvMAX (av) + 1);
265		435
266	#define LOAD(state) load_state(aTHX_ (state));	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
267	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	437	}
268		438
269	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	439	/ load & save, init *****************************************************/
270		440
271	static void	441	static void
272	load_state(pTHX_ Coro__State c)	442	load_perl (pTHX_ Coro__State c)
273	{	443	{
274	PL_dowarn = c->dowarn;	444	perl_slots *slot = c->slot;
275	PL_in_eval = c->in_eval;	445	c->slot = 0;
276		446
277	PL_curstackinfo = c->curstackinfo;
278	PL_curstack = c->curstack;
279	PL_mainstack = c->mainstack;	447	PL_mainstack = c->mainstack;
280	PL_stack_sp = c->stack_sp;
281	PL_op = c->op;
282	PL_curpad = c->curpad;
283	PL_comppad = c->comppad;
284	PL_compcv = c->compcv;
285	PL_stack_base = c->stack_base;
286	PL_stack_max = c->stack_max;
287	PL_tmps_stack = c->tmps_stack;
288	PL_tmps_floor = c->tmps_floor;
289	PL_tmps_ix = c->tmps_ix;
290	PL_tmps_max = c->tmps_max;
291	PL_markstack = c->markstack;
292	PL_markstack_ptr = c->markstack_ptr;
293	PL_markstack_max = c->markstack_max;
294	PL_scopestack = c->scopestack;
295	PL_scopestack_ix = c->scopestack_ix;
296	PL_scopestack_max = c->scopestack_max;
297	PL_savestack = c->savestack;
298	PL_savestack_ix = c->savestack_ix;
299	PL_savestack_max = c->savestack_max;
300	#if PERL_VERSION < 9
301	PL_retstack = c->retstack;
302	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;
304	#endif
305	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308		448
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	449	GvSV (PL_defgv) = slot->defsv;
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	450	GvAV (PL_defgv) = slot->defav;
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	451	GvSV (PL_errgv) = slot->errsv;
		452	GvSV (irsgv) = slot->irsgv;
		453
		454	#define VAR(name,type) PL_ ## name = slot->name;
		455	# include "state.h"
		456	#undef VAR
		457
		458	/hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);/
		459	/hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);/
312		460
313	{	461	{
314	dSP;	462	dSP;
		463
315	CV *cv;	464	CV *cv;
316		465
317	/* now do the ugly restore mess */	466	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	467	while (expect_true (cv = (CV *)POPs))
319	{	468	{
320	AV padlist = (AV )POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	469	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	470	CvDEPTH (cv) = PTR2IV (POPs);
326	}	471	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	472	}
330		473
331	PUTBACK;	474	PUTBACK;
332	}	475	}
333	}	476	}
334		477
335	static void	478	static void
336	save_state(pTHX_ Coro__State c, int flags)	479	save_perl (pTHX_ Coro__State c)
337	{	480	{
338	{	481	{
339	dSP;	482	dSP;
340	I32 cxix = cxstack_ix;	483	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	484	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	487	/*
345	* the worst thing you can imagine happens first - we have to save	488	* the worst thing you can imagine happens first - we have to save
346	* (and reinitialize) all cv's in the whole callchain :(	489	* (and reinitialize) all cv's in the whole callchain :(
347	*/	490	*/
348		491
349	PUSHs (Nullsv);	492	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	493	/* this loop was inspired by pp_caller */
351	for (;;)	494	for (;;)
352	{	495	{
353	while (cxix >= 0)	496	while (expect_true (cxix >= 0))
354	{	497	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	498	PERL_CONTEXT *cx = &ccstk[cxix--];
356		499
357	if (CxTYPE(cx) == CXt_SUB)	500	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
358	{	501	{
359	CV *cv = cx->blk_sub.cv;	502	CV *cv = cx->blk_sub.cv;
		503
360	if (CvDEPTH(cv))	504	if (expect_true (CvDEPTH (cv)))
361	{	505	{
362	EXTEND (SP, CvDEPTH(cv)*2);	506	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	507	PUSHs ((SV *)CvPADLIST (cv));
		508	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	509	PUSHs ((SV *)cv);
373		510
		511	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	512	get_padlist (aTHX_ cv);
375	}	513	}
376	}	514	}
377	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)
379	{
380	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}
384	#endif
385	}	515	}
386		516
387	if (top_si->si_type == PERLSI_MAIN)	517	if (expect_true (top_si->si_type == PERLSI_MAIN))
388	break;	518	break;
389		519
390	top_si = top_si->si_prev;	520	top_si = top_si->si_prev;
391	ccstk = top_si->si_cxstack;	521	ccstk = top_si->si_cxstack;
392	cxix = top_si->si_cxix;	522	cxix = top_si->si_cxix;
393	}	523	}
394		524
395	PUTBACK;	525	PUTBACK;
396	}	526	}
397		527
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	528	/* allocate some space on the context stack for our purposes */
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	529	/* we manually unroll here, as usually 2 slots is enough */
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	530	if (SLOT_COUNT >= 1) CXINC;
		531	if (SLOT_COUNT >= 2) CXINC;
		532	if (SLOT_COUNT >= 3) CXINC;
		533	{
		534	int i;
		535	for (i = 3; i < SLOT_COUNT; ++i)
		536	CXINC;
		537	}
		538	cxstack_ix -= SLOT_COUNT; /* undo allocation */
401		539
402	c->dowarn = PL_dowarn;
403	c->in_eval = PL_in_eval;
404
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;	540	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;	541
409	c->op = PL_op;	542	{
410	c->curpad = PL_curpad;	543	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
411	c->comppad = PL_comppad;	544
412	c->compcv = PL_compcv;	545	slot->defav = GvAV (PL_defgv);
413	c->stack_base = PL_stack_base;	546	slot->defsv = DEFSV;
414	c->stack_max = PL_stack_max;	547	slot->errsv = ERRSV;
415	c->tmps_stack = PL_tmps_stack;	548	slot->irsgv = GvSV (irsgv);
416	c->tmps_floor = PL_tmps_floor;	549
417	c->tmps_ix = PL_tmps_ix;	550	#define VAR(name,type) slot->name = PL_ ## name;
418	c->tmps_max = PL_tmps_max;	551	# include "state.h"
419	c->markstack = PL_markstack;	552	#undef VAR
420	c->markstack_ptr = PL_markstack_ptr;	553	}
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
436	}	554	}
437		555
438	/*	556	/*
439	* allocate various perl stacks. This is an exact copy	557	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	558	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	559	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	560	* not usually need a lot of stackspace.
443	*/	561	*/
		562	#if 1
		563	# define coro_init_stacks init_stacks
		564	#else
444	static void	565	static void
445	coro_init_stacks (pTHX)	566	coro_init_stacks (pTHX)
446	{	567	{
447	LOCK;	568	PL_curstackinfo = new_stackinfo(32, 8);
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	569	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	570	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	571	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		572
454	PL_stack_base = AvARRAY(PL_curstack);	573	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	574	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	575	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		576
458	New(50,PL_tmps_stack,96,SV*);	577	New(50,PL_tmps_stack,32,SV*);
459	PL_tmps_floor = -1;	578	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	579	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	580	PL_tmps_max = 32;
462		581
463	New(54,PL_markstack,16,I32);	582	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	583	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	584	PL_markstack_max = PL_markstack + 16;
466		585
467	#ifdef SET_MARK_OFFSET	586	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	587	SET_MARK_OFFSET;
469	#endif	588	#endif
470		589
471	New(54,PL_scopestack,16,I32);	590	New(54,PL_scopestack,8,I32);
472	PL_scopestack_ix = 0;	591	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	592	PL_scopestack_max = 8;
474		593
475	New(54,PL_savestack,96,ANY);	594	New(54,PL_savestack,24,ANY);
476	PL_savestack_ix = 0;	595	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	596	PL_savestack_max = 24;
478		597
479	#if PERL_VERSION < 9	598	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	599	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	600	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	601	PL_retstack_max = 4;
483	#endif	602	#endif
484
485	UNLOCK;
486	}	603	}
		604	#endif
487		605
488	/*	606	/*
489	* destroy the stacks, the callchain etc...	607	* destroy the stacks, the callchain etc...
490	*/	608	*/
491	static void	609	static void
492	destroy_stacks(pTHX)	610	coro_destroy_stacks (pTHX)
493	{	611	{
494	if (!IN_DESTRUCT)
495	{
496	/* is this ugly, I ask? */
497	LEAVE_SCOPE (0);
498
499	/* sure it is, but more important: is it correct?? :/ */
500	FREETMPS;
501
502	/POPSTACK_TO (PL_mainstack);//D//use/
503	}
504
505	while (PL_curstackinfo->si_next)	612	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	613	PL_curstackinfo = PL_curstackinfo->si_next;
507		614
508	while (PL_curstackinfo)	615	while (PL_curstackinfo)
509	{	616	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	617	PERL_SI *p = PL_curstackinfo->si_prev;
511		618
512	{ /D//remove/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	619	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/D//remove/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	620	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		621
524	Safefree (PL_curstackinfo->si_cxstack);	622	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	623	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	624	PL_curstackinfo = p;
527	}	625	}
528		626
529	Safefree (PL_tmps_stack);	627	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	628	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	629	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	630	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	631	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	632	Safefree (PL_retstack);
535	#endif	633	#endif
536	}	634	}
537		635
538	static void	636	static size_t
539	allocate_stack (Coro__State ctx, int alloc)	637	coro_rss (pTHX_ struct coro *coro)
540	{	638	{
541	coro_stack *stack;	639	size_t rss = sizeof (*coro);
542		640
543	New (0, stack, 1, coro_stack);	641	if (coro->mainstack)
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{	642	{
551	#if HAVE_MMAP	643	perl_slots tmp_slot;
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	644	perl_slots *slot;
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	645
554	if (stack->sptr != (void *)-1)	646	if (coro->flags & CF_RUNNING)
555	{	647	{
556	# if STACKGUARD	648	slot = &tmp_slot;
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	649
558	# endif	650	#define VAR(name,type) slot->name = PL_ ## name;
		651	# include "state.h"
		652	#undef VAR
559	}	653	}
560	else	654	else
561	#endif	655	slot = coro->slot;
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569		656
570	ctx->stack = stack;	657	rss += sizeof (slot->curstackinfo);
571	}	658	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		659	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		660	rss += slot->tmps_max * sizeof (SV *);
		661	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		662	rss += slot->scopestack_max * sizeof (I32);
		663	rss += slot->savestack_max * sizeof (ANY);
572		664
573	static void	665	#if !PERL_VERSION_ATLEAST (5,9,0)
574	deallocate_stack (Coro__State ctx)	666	rss += slot->retstack_max * sizeof (OP *);
575	{	667	#endif
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{	668	}
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590		669
591	Safefree (stack);	670	return rss;
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}	671	}
597		672
		673	/ coroutine stack handling **********************************************/
		674
598	static void	675	static void
599	setup_coro (void *arg)	676	coro_setup (pTHX_ struct coro *coro)
600	{	677	{
601	/*	678	/*
602	* emulate part of the perl startup here.	679	* emulate part of the perl startup here.
603	*/	680	*/
		681	coro_init_stacks (aTHX);
		682
		683	PL_runops = RUNOPS_DEFAULT;
		684	PL_curcop = &PL_compiling;
		685	PL_in_eval = EVAL_NULL;
		686	PL_comppad = 0;
		687	PL_curpm = 0;
		688	PL_curpad = 0;
		689	PL_localizing = 0;
		690	PL_dirty = 0;
		691	PL_restartop = 0;
		692	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		693	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		694
		695	GvSV (PL_defgv) = newSV (0);
		696	GvAV (PL_defgv) = coro->args; coro->args = 0;
		697	GvSV (PL_errgv) = newSV (0);
		698	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		699	PL_rs = newSVsv (GvSV (irsgv));
		700	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		701
		702	{
		703	dSP;
		704	LOGOP myop;
		705
		706	Zero (&myop, 1, LOGOP);
		707	myop.op_next = Nullop;
		708	myop.op_flags = OPf_WANT_VOID;
		709
		710	PUSHMARK (SP);
		711	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		712	PUTBACK;
		713	PL_op = (OP *)&myop;
		714	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		715	SPAGAIN;
		716	}
		717
		718	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		719	}
		720
		721	static void
		722	coro_destroy (pTHX_ struct coro *coro)
		723	{
		724	if (!IN_DESTRUCT)
		725	{
		726	/* restore all saved variables and stuff */
		727	LEAVE_SCOPE (0);
		728	assert (PL_tmps_floor == -1);
		729
		730	/* free all temporaries */
		731	FREETMPS;
		732	assert (PL_tmps_ix == -1);
		733
		734	/* unwind all extra stacks */
		735	POPSTACK_TO (PL_mainstack);
		736
		737	/* unwind main stack */
		738	dounwind (-1);
		739	}
		740
		741	SvREFCNT_dec (GvSV (PL_defgv));
		742	SvREFCNT_dec (GvAV (PL_defgv));
		743	SvREFCNT_dec (GvSV (PL_errgv));
		744	SvREFCNT_dec (PL_defoutgv);
		745	SvREFCNT_dec (PL_rs);
		746	SvREFCNT_dec (GvSV (irsgv));
		747
		748	SvREFCNT_dec (PL_diehook);
		749	SvREFCNT_dec (PL_warnhook);
		750
		751	SvREFCNT_dec (coro->saved_deffh);
		752	SvREFCNT_dec (coro->throw);
		753
		754	coro_destroy_stacks (aTHX);
		755	}
		756
		757	static void
		758	free_coro_mortal (pTHX)
		759	{
		760	if (expect_true (coro_mortal))
		761	{
		762	SvREFCNT_dec (coro_mortal);
		763	coro_mortal = 0;
		764	}
		765	}
		766
		767	static int
		768	runops_trace (pTHX)
		769	{
		770	COP *oldcop = 0;
		771	int oldcxix = -2;
		772	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		773	coro_cctx *cctx = coro->cctx;
		774
		775	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		776	{
		777	PERL_ASYNC_CHECK ();
		778
		779	if (cctx->flags & CC_TRACE_ALL)
		780	{
		781	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		782	{
		783	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		784	SV bot, top;
		785	AV av = newAV (); / return values */
		786	SV **cb;
		787	dSP;
		788
		789	GV *gv = CvGV (cx->blk_sub.cv);
		790	SV *fullname = sv_2mortal (newSV (0));
		791	if (isGV (gv))
		792	gv_efullname3 (fullname, gv, 0);
		793
		794	bot = PL_stack_base + cx->blk_oldsp + 1;
		795	top = cx->blk_gimme == G_ARRAY ? SP + 1
		796	: cx->blk_gimme == G_SCALAR ? bot + 1
		797	: bot;
		798
		799	av_extend (av, top - bot);
		800	while (bot < top)
		801	av_push (av, SvREFCNT_inc (*bot++));
		802
		803	PL_runops = RUNOPS_DEFAULT;
		804	ENTER;
		805	SAVETMPS;
		806	EXTEND (SP, 3);
		807	PUSHMARK (SP);
		808	PUSHs (&PL_sv_no);
		809	PUSHs (fullname);
		810	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		811	PUTBACK;
		812	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		813	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		814	SPAGAIN;
		815	FREETMPS;
		816	LEAVE;
		817	PL_runops = runops_trace;
		818	}
		819
		820	if (oldcop != PL_curcop)
		821	{
		822	oldcop = PL_curcop;
		823
		824	if (PL_curcop != &PL_compiling)
		825	{
		826	SV **cb;
		827
		828	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		829	{
		830	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		831
		832	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		833	{
		834	runops_proc_t old_runops = PL_runops;
		835	dSP;
		836	GV *gv = CvGV (cx->blk_sub.cv);
		837	SV *fullname = sv_2mortal (newSV (0));
		838
		839	if (isGV (gv))
		840	gv_efullname3 (fullname, gv, 0);
		841
		842	PL_runops = RUNOPS_DEFAULT;
		843	ENTER;
		844	SAVETMPS;
		845	EXTEND (SP, 3);
		846	PUSHMARK (SP);
		847	PUSHs (&PL_sv_yes);
		848	PUSHs (fullname);
		849	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		850	PUTBACK;
		851	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		852	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		853	SPAGAIN;
		854	FREETMPS;
		855	LEAVE;
		856	PL_runops = runops_trace;
		857	}
		858
		859	oldcxix = cxstack_ix;
		860	}
		861
		862	if (cctx->flags & CC_TRACE_LINE)
		863	{
		864	dSP;
		865
		866	PL_runops = RUNOPS_DEFAULT;
		867	ENTER;
		868	SAVETMPS;
		869	EXTEND (SP, 3);
		870	PL_runops = RUNOPS_DEFAULT;
		871	PUSHMARK (SP);
		872	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		873	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		874	PUTBACK;
		875	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		876	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		877	SPAGAIN;
		878	FREETMPS;
		879	LEAVE;
		880	PL_runops = runops_trace;
		881	}
		882	}
		883	}
		884	}
		885	}
		886
		887	TAINT_NOT;
		888	return 0;
		889	}
		890
		891	/* inject a fake call to Coro::State::_cctx_init into the execution */
		892	/* _cctx_init should be careful, as it could be called at almost any time */
		893	/* during execution of a perl program */
		894	static void NOINLINE
		895	cctx_prepare (pTHX_ coro_cctx *cctx)
		896	{
		897	dSP;
		898	LOGOP myop;
		899
		900	PL_top_env = &PL_start_env;
		901
		902	if (cctx->flags & CC_TRACE)
		903	PL_runops = runops_trace;
		904
		905	Zero (&myop, 1, LOGOP);
		906	myop.op_next = PL_op;
		907	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		908
		909	PUSHMARK (SP);
		910	EXTEND (SP, 2);
		911	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		912	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		913	PUTBACK;
		914	PL_op = (OP *)&myop;
		915	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		916	SPAGAIN;
		917	}
		918
		919	/*
		920	* this is a _very_ stripped down perl interpreter ;)
		921	*/
		922	static void
		923	cctx_run (void *arg)
		924	{
604	dTHX;	925	dTHX;
605	dSP;
606	Coro__State ctx = (Coro__State)arg;
607	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
608		926
609	coro_init_stacks (aTHX);	927	/* cctx_run is the alternative tail of transfer(), so unlock here. */
610	/PL_curcop = 0;/	928	UNLOCK;
611	/PL_in_eval = PL_in_eval;/ /* inherit */
612	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
614		929
615	SPAGAIN;	930	/* we now skip the entersub that lead to transfer() */
		931	PL_op = PL_op->op_next;
616		932
617	if (ctx->stack)	933	/* inject a fake subroutine call to cctx_init */
618	{	934	cctx_prepare (aTHX_ (coro_cctx *)arg);
619	ctx->cursp = 0;
620		935
621	PUSHMARK(SP);	936	/* somebody or something will hit me for both perl_run and PL_restartop */
622	PUTBACK;	937	PL_restartop = PL_op;
623	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);	938	perl_run (PL_curinterp);
624		939
625	if (SvTRUE (ERRSV))	940	/*
626	croak (NULL);	941	* If perl-run returns we assume exit() was being called or the coro
627	else	942	* fell off the end, which seems to be the only valid (non-bug)
628	croak ("FATAL: CCTXT coroutine returned!");	943	* reason for perl_run to return. We try to exit by jumping to the
		944	* bootstrap-time "top" top_env, as we cannot restore the "main"
		945	* coroutine as Coro has no such concept
		946	*/
		947	PL_top_env = main_top_env;
		948	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		949	}
		950
		951	static coro_cctx *
		952	cctx_new ()
		953	{
		954	coro_cctx *cctx;
		955	void *stack_start;
		956	size_t stack_size;
		957
		958	++cctx_count;
		959
		960	Newz (0, cctx, 1, coro_cctx);
		961
		962	#if HAVE_MMAP
		963	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		964	/* mmap supposedly does allocate-on-write for us */
		965	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		966
		967	if (cctx->sptr != (void *)-1)
		968	{
		969	# if CORO_STACKGUARD
		970	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		971	# endif
		972	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		973	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		974	cctx->flags \|= CC_MAPPED;
629	}	975	}
630	else	976	else
631	{	977	#endif
632	UNOP myop;
633
634	Zero(&myop, 1, UNOP);
635	myop.op_next = Nullop;
636	myop.op_flags = OPf_WANT_VOID;
637
638	PL_op = (OP *)&myop;
639
640	PUSHMARK(SP);
641	XPUSHs (sub_init);
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;
652
653	ENTER; /* necessary e.g. for dounwind */
654	}	978	{
655	}	979	cctx->ssize = coro_stacksize * (long)sizeof (long);
		980	New (0, cctx->sptr, coro_stacksize, long);
656		981
657	static void	982	if (!cctx->sptr)
658	continue_coro (void *arg)	983	{
659	{	984	perror ("FATAL: unable to allocate stack for coroutine");
660	/*	985	_exit (EXIT_FAILURE);
661	* this is a _very_ stripped down perl interpreter ;)	986	}
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665		987
666	PL_top_env = &ctx->start_env;	988	stack_start = cctx->sptr;
		989	stack_size = cctx->ssize;
		990	}
667		991
668	ctx->cursp = 0;	992	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
669	PL_op = PL_op->op_next;	993	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
670	CALLRUNOPS(aTHX);
671		994
672	abort ();	995	return cctx;
673	}	996	}
674		997
675	static void	998	static void
		999	cctx_destroy (coro_cctx *cctx)
		1000	{
		1001	if (!cctx)
		1002	return;
		1003
		1004	--cctx_count;
		1005
		1006	#if CORO_USE_VALGRIND
		1007	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1008	#endif
		1009
		1010	#if HAVE_MMAP
		1011	if (cctx->flags & CC_MAPPED)
		1012	munmap (cctx->sptr, cctx->ssize);
		1013	else
		1014	#endif
		1015	Safefree (cctx->sptr);
		1016
		1017	Safefree (cctx);
		1018	}
		1019
		1020	/* wether this cctx should be destructed */
		1021	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1022
		1023	static coro_cctx *
		1024	cctx_get (pTHX)
		1025	{
		1026	while (expect_true (cctx_first))
		1027	{
		1028	coro_cctx *cctx = cctx_first;
		1029	cctx_first = cctx->next;
		1030	--cctx_idle;
		1031
		1032	if (expect_true (!CCTX_EXPIRED (cctx)))
		1033	return cctx;
		1034
		1035	cctx_destroy (cctx);
		1036	}
		1037
		1038	return cctx_new ();
		1039	}
		1040
		1041	static void
		1042	cctx_put (coro_cctx *cctx)
		1043	{
		1044	/* free another cctx if overlimit */
		1045	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1046	{
		1047	coro_cctx *first = cctx_first;
		1048	cctx_first = first->next;
		1049	--cctx_idle;
		1050
		1051	cctx_destroy (first);
		1052	}
		1053
		1054	++cctx_idle;
		1055	cctx->next = cctx_first;
		1056	cctx_first = cctx;
		1057	}
		1058
		1059	/ coroutine switching ***************************************************/
		1060
		1061	static void
		1062	transfer_check (pTHX_ struct coro prev, struct coro next)
		1063	{
		1064	if (expect_true (prev != next))
		1065	{
		1066	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1067	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1068
		1069	if (expect_false (next->flags & CF_RUNNING))
		1070	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1071
		1072	if (expect_false (next->flags & CF_DESTROYED))
		1073	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1074
		1075	if (
		1076	#if PERL_VERSION_ATLEAST (5,9,0)
		1077	expect_false (PL_parser)
		1078	#else
		1079	expect_false (PL_lex_state != LEX_NOTPARSING)
		1080	#endif
		1081	)
		1082	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1083	}
		1084	}
		1085
		1086	/* always use the TRANSFER macro */
		1087	static void NOINLINE
676	transfer (pTHX_ struct coro prev, struct coro next, int flags)	1088	transfer (pTHX_ struct coro prev, struct coro next)
677	{	1089	{
678	dSTACKLEVEL;	1090	dSTACKLEVEL;
679		1091
680	if (prev != next)	1092	/* sometimes transfer is only called to set idle_sp */
		1093	if (expect_false (!next))
		1094	{
		1095	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1096	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
681	{	1097	}
682	if (next->mainstack)	1098	else if (expect_true (prev != next))
		1099	{
		1100	coro_cctx *prev__cctx;
		1101
		1102	if (expect_false (prev->flags & CF_NEW))
683	{	1103	{
684	LOCK;	1104	/* create a new empty context */
685	SAVE (prev, flags);	1105	Newz (0, prev->cctx, 1, coro_cctx);
686	LOAD (next);	1106	prev->flags &= ~CF_NEW;
687	UNLOCK;	1107	prev->flags \|= CF_RUNNING;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}	1108	}
722	else if (next->tmps_ix == -2)	1109
723	croak ("tried to transfer to running coroutine");	1110	prev->flags &= ~CF_RUNNING;
		1111	next->flags \|= CF_RUNNING;
		1112
		1113	LOCK;
		1114
		1115	if (expect_false (next->flags & CF_NEW))
		1116	{
		1117	/* need to start coroutine */
		1118	next->flags &= ~CF_NEW;
		1119	/* first get rid of the old state */
		1120	save_perl (aTHX_ prev);
		1121	/* setup coroutine call */
		1122	coro_setup (aTHX_ next);
		1123	}
724	else	1124	else
725	{	1125	{
726	LOCK;	1126	/* coroutine already started */
727	SAVE (prev, -1); /* first get rid of the old state */	1127	save_perl (aTHX_ prev);
		1128	load_perl (aTHX_ next);
		1129	}
		1130
		1131	prev__cctx = prev->cctx;
		1132
		1133	/* possibly "free" the cctx */
		1134	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1135	{
		1136	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1137	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1138
		1139	prev->cctx = 0;
		1140
		1141	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1142	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1143	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1144	if (!next->cctx)
		1145	next->cctx = cctx_get (aTHX);
		1146
		1147	cctx_put (prev__cctx);
		1148	}
		1149
		1150	++next->usecount;
		1151
		1152	if (expect_true (!next->cctx))
		1153	next->cctx = cctx_get (aTHX);
		1154
		1155	if (expect_false (prev__cctx != next->cctx))
		1156	{
		1157	prev__cctx->top_env = PL_top_env;
		1158	PL_top_env = next->cctx->top_env;
		1159	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1160	}
		1161
		1162	free_coro_mortal (aTHX);
728	UNLOCK;	1163	UNLOCK;
729		1164
730	if (flags & TRANSFER_SAVE_CCTXT)	1165	if (expect_false (prev->throw \|\| next->throw))
		1166	{
		1167	struct coro *coro = SvSTATE (coro_current);
		1168
		1169	if (coro->throw)
731	{	1170	{
732	if (!prev->stack)	1171	SV *exception = coro->throw;
733	allocate_stack (prev, 0);	1172	coro->throw = 0;
734		1173	sv_setsv (ERRSV, exception);
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
738
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);	1174	croak (0);
762	next->cursp = stacklevel;
763	}	1175	}
764	}	1176	}
765	}	1177	}
		1178	}
766		1179
767	LOCK;	1180	struct transfer_args
768	if (coro_mortal)	1181	{
769	{	1182	struct coro prev, next;
770	SvREFCNT_dec (coro_mortal);	1183	};
771	coro_mortal = 0;	1184
		1185	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1186	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1187
		1188	/ high level stuff ******************************************************/
		1189
		1190	static int
		1191	coro_state_destroy (pTHX_ struct coro *coro)
		1192	{
		1193	if (coro->flags & CF_DESTROYED)
		1194	return 0;
		1195
		1196	coro->flags \|= CF_DESTROYED;
		1197
		1198	if (coro->flags & CF_READY)
772	}	1199	{
		1200	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1201	/* alternative: look through all ready queues and remove the coro */
		1202	LOCK;
		1203	--coro_nready;
773	UNLOCK;	1204	UNLOCK;
774	}	1205	}
		1206	else
		1207	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
775		1208
776	#define SV_CORO(sv,func) \	1209	if (coro->mainstack && coro->mainstack != main_mainstack)
777	do { \	1210	{
778	if (SvROK (sv)) \	1211	struct coro temp;
779	sv = SvRV (sv); \
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		1212
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1213	if (coro->flags & CF_RUNNING)
		1214	croak ("FATAL: tried to destroy currently running coroutine");
798		1215
		1216	save_perl (aTHX_ &temp);
		1217	load_perl (aTHX_ coro);
		1218
		1219	coro_destroy (aTHX_ coro);
		1220
		1221	load_perl (aTHX_ &temp);
		1222
		1223	coro->slot = 0;
		1224	}
		1225
		1226	cctx_destroy (coro->cctx);
		1227	SvREFCNT_dec (coro->args);
		1228
		1229	if (coro->next) coro->next->prev = coro->prev;
		1230	if (coro->prev) coro->prev->next = coro->next;
		1231	if (coro == coro_first) coro_first = coro->next;
		1232
		1233	return 1;
		1234	}
		1235
799	static void	1236	static int
		1237	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1238	{
		1239	struct coro coro = (struct coro )mg->mg_ptr;
		1240	mg->mg_ptr = 0;
		1241
		1242	coro->hv = 0;
		1243
		1244	if (--coro->refcnt < 0)
		1245	{
		1246	coro_state_destroy (aTHX_ coro);
		1247	Safefree (coro);
		1248	}
		1249
		1250	return 0;
		1251	}
		1252
		1253	static int
		1254	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1255	{
		1256	struct coro coro = (struct coro )mg->mg_ptr;
		1257
		1258	++coro->refcnt;
		1259
		1260	return 0;
		1261	}
		1262
		1263	static MGVTBL coro_state_vtbl = {
		1264	0, 0, 0, 0,
		1265	coro_state_free,
		1266	0,
		1267	#ifdef MGf_DUP
		1268	coro_state_dup,
		1269	#else
		1270	# define MGf_DUP 0
		1271	#endif
		1272	};
		1273
		1274	static void
		1275	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1276	{
		1277	ta->prev = SvSTATE (prev_sv);
		1278	ta->next = SvSTATE (next_sv);
		1279	TRANSFER_CHECK (*ta);
		1280	}
		1281
		1282	static void
800	api_transfer(pTHX_ SV prev, SV next, int flags)	1283	api_transfer (SV prev_sv, SV next_sv)
801	{	1284	{
802	SV_CORO (prev, "Coro::transfer");	1285	dTHX;
803	SV_CORO (next, "Coro::transfer");	1286	struct transfer_args ta;
804		1287
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1288	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1289	TRANSFER (ta);
806	}	1290	}
807		1291
808	/ Coro ******************************************************************/	1292	/ Coro ******************************************************************/
809		1293
810	#define PRIO_MAX 3
811	#define PRIO_HIGH 1
812	#define PRIO_NORMAL 0
813	#define PRIO_LOW -1
814	#define PRIO_IDLE -3
815	#define PRIO_MIN -4
816
817	/* for Coro.pm */
818	static GV coro_current, coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;
821
822	static void	1294	static void
823	coro_enq (pTHX_ SV *sv)	1295	coro_enq (pTHX_ SV *coro_sv)
824	{	1296	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	1297	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1298	}
841		1299
842	static SV *	1300	static SV *
843	coro_deq (pTHX_ int min_prio)	1301	coro_deq (pTHX_ int min_prio)
844	{	1302	{
…		…
847	min_prio -= PRIO_MIN;	1305	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1306	if (min_prio < 0)
849	min_prio = 0;	1307	min_prio = 0;
850		1308
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1309	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	1310	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1311	return av_shift (coro_ready [prio]);
856	}
857		1312
858	return 0;	1313	return 0;
859	}	1314	}
860		1315
861	static void	1316	static int
862	api_ready (SV *coro)	1317	api_ready (SV *coro_sv)
863	{	1318	{
864	dTHX;	1319	dTHX;
		1320	struct coro *coro;
865		1321
866	if (SvROK (coro))	1322	if (SvROK (coro_sv))
867	coro = SvRV (coro);	1323	coro_sv = SvRV (coro_sv);
		1324
		1325	coro = SvSTATE (coro_sv);
		1326
		1327	if (coro->flags & CF_READY)
		1328	return 0;
		1329
		1330	coro->flags \|= CF_READY;
868		1331
869	LOCK;	1332	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1333	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1334	++coro_nready;
871	UNLOCK;	1335	UNLOCK;
		1336
		1337	return 1;
		1338	}
		1339
		1340	static int
		1341	api_is_ready (SV *coro_sv)
		1342	{
		1343	dTHX;
		1344	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1345	}
		1346
		1347	static void
		1348	prepare_schedule (pTHX_ struct transfer_args *ta)
		1349	{
		1350	SV prev_sv, next_sv;
		1351
		1352	for (;;)
		1353	{
		1354	LOCK;
		1355	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1356
		1357	/* nothing to schedule: call the idle handler */
		1358	if (expect_false (!next_sv))
		1359	{
		1360	dSP;
		1361	UNLOCK;
		1362
		1363	ENTER;
		1364	SAVETMPS;
		1365
		1366	PUSHMARK (SP);
		1367	PUTBACK;
		1368	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1369
		1370	FREETMPS;
		1371	LEAVE;
		1372	continue;
		1373	}
		1374
		1375	ta->next = SvSTATE (next_sv);
		1376
		1377	/* cannot transfer to destroyed coros, skip and look for next */
		1378	if (expect_false (ta->next->flags & CF_DESTROYED))
		1379	{
		1380	UNLOCK;
		1381	SvREFCNT_dec (next_sv);
		1382	/* coro_nready is already taken care of by destroy */
		1383	continue;
		1384	}
		1385
		1386	--coro_nready;
		1387	UNLOCK;
		1388	break;
		1389	}
		1390
		1391	/* free this only after the transfer */
		1392	prev_sv = SvRV (coro_current);
		1393	ta->prev = SvSTATE (prev_sv);
		1394	TRANSFER_CHECK (*ta);
		1395	assert (ta->next->flags & CF_READY);
		1396	ta->next->flags &= ~CF_READY;
		1397	SvRV_set (coro_current, next_sv);
		1398
		1399	LOCK;
		1400	free_coro_mortal (aTHX);
		1401	coro_mortal = prev_sv;
		1402	UNLOCK;
		1403	}
		1404
		1405	static void
		1406	prepare_cede (pTHX_ struct transfer_args *ta)
		1407	{
		1408	api_ready (coro_current);
		1409	prepare_schedule (aTHX_ ta);
		1410	}
		1411
		1412	static int
		1413	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1414	{
		1415	if (coro_nready)
		1416	{
		1417	SV *prev = SvRV (coro_current);
		1418	prepare_schedule (aTHX_ ta);
		1419	api_ready (prev);
		1420	return 1;
		1421	}
		1422	else
		1423	return 0;
872	}	1424	}
873		1425
874	static void	1426	static void
875	api_schedule (void)	1427	api_schedule (void)
876	{	1428	{
877	dTHX;	1429	dTHX;
		1430	struct transfer_args ta;
878		1431
879	SV prev, next;	1432	prepare_schedule (aTHX_ &ta);
880		1433	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
901	}	1434	}
902		1435
903	static void	1436	static int
904	api_cede (void)	1437	api_cede (void)
905	{	1438	{
906	dTHX;	1439	dTHX;
		1440	struct transfer_args ta;
907		1441
908	LOCK;	1442	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1443
912	api_schedule ();	1444	if (expect_true (ta.prev != ta.next))
		1445	{
		1446	TRANSFER (ta);
		1447	return 1;
		1448	}
		1449	else
		1450	return 0;
913	}	1451	}
914		1452
		1453	static int
		1454	api_cede_notself (void)
		1455	{
		1456	dTHX;
		1457	struct transfer_args ta;
		1458
		1459	if (prepare_cede_notself (aTHX_ &ta))
		1460	{
		1461	TRANSFER (ta);
		1462	return 1;
		1463	}
		1464	else
		1465	return 0;
		1466	}
		1467
		1468	static void
		1469	api_trace (SV *coro_sv, int flags)
		1470	{
		1471	dTHX;
		1472	struct coro *coro = SvSTATE (coro_sv);
		1473
		1474	if (flags & CC_TRACE)
		1475	{
		1476	if (!coro->cctx)
		1477	coro->cctx = cctx_new ();
		1478	else if (!(coro->cctx->flags & CC_TRACE))
		1479	croak ("cannot enable tracing on coroutine with custom stack");
		1480
		1481	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1482	}
		1483	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1484	{
		1485	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1486
		1487	if (coro->flags & CF_RUNNING)
		1488	PL_runops = RUNOPS_DEFAULT;
		1489	else
		1490	coro->slot->runops = RUNOPS_DEFAULT;
		1491	}
		1492	}
		1493
915	MODULE = Coro::State PACKAGE = Coro::State	1494	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1495
917	PROTOTYPES: ENABLE	1496	PROTOTYPES: DISABLE
918		1497
919	BOOT:	1498	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1499	{
921	#ifdef USE_ITHREADS	1500	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1501	MUTEX_INIT (&coro_mutex);
923	#endif	1502	#endif
924	BOOT_PAGESIZE;	1503	BOOT_PAGESIZE;
925		1504
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1505	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1506	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1507
		1508	hv_sig = coro_get_hv ("SIG", TRUE);
		1509	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1510	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1511
		1512	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1513	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1514
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1515	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1516
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934		1521
935	main_mainstack = PL_mainstack;	1522	main_mainstack = PL_mainstack;
		1523	main_top_env = PL_top_env;
		1524
		1525	while (main_top_env->je_prev)
		1526	main_top_env = main_top_env->je_prev;
936		1527
937	coroapi.ver = CORO_API_VERSION;	1528	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1529	coroapi.transfer = api_transfer;
939	}
940		1530
941	Coro::State	1531	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1532	}
943	SV * args	1533
944	PROTOTYPE: $	1534	SV *
		1535	new (char *klass, ...)
945	CODE:	1536	CODE:
946	Coro__State coro;	1537	{
		1538	struct coro *coro;
		1539	HV *hv;
		1540	int i;
947		1541
948	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1542	Newz (0, coro, 1, struct coro);
		1543	coro->args = newAV ();
		1544	coro->flags = CF_NEW;
952		1545
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1546	if (coro_first) coro_first->prev = coro;
954	/coro->mainstack = 0; //actual work is done inside transfer /	1547	coro->next = coro_first;
955	/coro->stack = 0;/	1548	coro_first = coro;
956		1549
957	/* same as JMPENV_BOOTSTRAP */	1550	coro->hv = hv = newHV ();
958	/* we might be able to recycle start_env, but safe is safe */	1551	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
959	/Zero (&coro->start_env, 1, JMPENV);/	1552	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962		1553
963	RETVAL = coro;	1554	av_extend (coro->args, items - 1);
		1555	for (i = 1; i < items; i++)
		1556	av_push (coro->args, newSVsv (ST (i)));
		1557	}
964	OUTPUT:	1558	OUTPUT:
965	RETVAL	1559	RETVAL
966		1560
		1561	# these not obviously related functions are all rolled into the same xs
		1562	# function to increase chances that they all will call transfer with the same
		1563	# stack offset
967	void	1564	void
968	transfer(prev, next, flags)	1565	_set_stacklevel (...)
969	SV *prev	1566	ALIAS:
970	SV *next	1567	Coro::State::transfer = 1
971	int flags	1568	Coro::schedule = 2
972	PROTOTYPE: @	1569	Coro::cede = 3
		1570	Coro::cede_notself = 4
973	CODE:	1571	CODE:
974	PUTBACK;	1572	{
975	SV_CORO (next, "Coro::transfer");	1573	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1574
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1575	switch (ix)
978	SPAGAIN;	1576	{
		1577	case 0:
		1578	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1579	ta.next = 0;
		1580	break;
		1581
		1582	case 1:
		1583	if (items != 2)
		1584	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1585
		1586	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1587	break;
		1588
		1589	case 2:
		1590	prepare_schedule (aTHX_ &ta);
		1591	break;
		1592
		1593	case 3:
		1594	prepare_cede (aTHX_ &ta);
		1595	break;
		1596
		1597	case 4:
		1598	if (!prepare_cede_notself (aTHX_ &ta))
		1599	XSRETURN_EMPTY;
		1600
		1601	break;
		1602	}
		1603
		1604	BARRIER;
		1605	TRANSFER (ta);
		1606
		1607	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1608	XSRETURN_YES;
		1609	}
		1610
		1611	bool
		1612	_destroy (SV *coro_sv)
		1613	CODE:
		1614	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1615	OUTPUT:
		1616	RETVAL
979		1617
980	void	1618	void
981	DESTROY(coro)
982	Coro::State coro
983	CODE:
984
985	if (coro->mainstack && coro->mainstack != main_mainstack)
986	{
987	struct coro temp;
988
989	PUTBACK;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
991	LOAD (aTHX_ coro);
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005
1006	void
1007	_exit(code)	1619	_exit (code)
1008	int code	1620	int code
1009	PROTOTYPE: $	1621	PROTOTYPE: $
1010	CODE:	1622	CODE:
1011	_exit (code);	1623	_exit (code);
1012		1624
1013	MODULE = Coro::State PACKAGE = Coro::Cont	1625	int
		1626	cctx_stacksize (int new_stacksize = 0)
		1627	CODE:
		1628	RETVAL = coro_stacksize;
		1629	if (new_stacksize)
		1630	coro_stacksize = new_stacksize;
		1631	OUTPUT:
		1632	RETVAL
1014		1633
1015	# this is slightly dirty (should expose a c-level api)	1634	int
		1635	cctx_count ()
		1636	CODE:
		1637	RETVAL = cctx_count;
		1638	OUTPUT:
		1639	RETVAL
		1640
		1641	int
		1642	cctx_idle ()
		1643	CODE:
		1644	RETVAL = cctx_idle;
		1645	OUTPUT:
		1646	RETVAL
1016		1647
1017	void	1648	void
1018	yield(...)	1649	list ()
1019	PROTOTYPE: @	1650	PPCODE:
		1651	{
		1652	struct coro *coro;
		1653	for (coro = coro_first; coro; coro = coro->next)
		1654	if (coro->hv)
		1655	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1656	}
		1657
		1658	void
		1659	call (Coro::State coro, SV *coderef)
		1660	ALIAS:
		1661	eval = 1
		1662	CODE:
		1663	{
		1664	if (coro->mainstack)
		1665	{
		1666	struct coro temp;
		1667
		1668	if (!(coro->flags & CF_RUNNING))
		1669	{
		1670	save_perl (aTHX_ &temp);
		1671	load_perl (aTHX_ coro);
		1672	}
		1673
		1674	{
		1675	dSP;
		1676	ENTER;
		1677	SAVETMPS;
		1678	PUSHMARK (SP);
		1679	PUTBACK;
		1680
		1681	if (ix)
		1682	eval_sv (coderef, 0);
		1683	else
		1684	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1685
		1686	SPAGAIN;
		1687	FREETMPS;
		1688	LEAVE;
		1689	PUTBACK;
		1690	}
		1691
		1692	if (!(coro->flags & CF_RUNNING))
		1693	{
		1694	save_perl (aTHX_ coro);
		1695	load_perl (aTHX_ &temp);
		1696	}
		1697	}
		1698	}
		1699
		1700	SV *
		1701	is_ready (Coro::State coro)
		1702	PROTOTYPE: $
		1703	ALIAS:
		1704	is_ready = CF_READY
		1705	is_running = CF_RUNNING
		1706	is_new = CF_NEW
		1707	is_destroyed = CF_DESTROYED
		1708	CODE:
		1709	RETVAL = boolSV (coro->flags & ix);
		1710	OUTPUT:
		1711	RETVAL
		1712
		1713	void
		1714	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1715
		1716	SV *
		1717	has_stack (Coro::State coro)
		1718	PROTOTYPE: $
		1719	CODE:
		1720	RETVAL = boolSV (!!coro->cctx);
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	int
		1725	is_traced (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	IV
		1733	rss (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	usecount = 1
1020	CODE:	1737	CODE:
1021	SV *yieldstack;	1738	switch (ix)
1022	SV *sv;	1739	{
1023	AV *defav = GvAV (PL_defgv);	1740	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1024	struct coro prev, next;	1741	case 1: RETVAL = coro->usecount; break;
1025
1026	yieldstack = *hv_fetch (
1027	(HV *)SvRV (GvSV (coro_current)),
1028	"yieldstack", sizeof ("yieldstack") - 1,
1029	0	1742	}
1030	);	1743	OUTPUT:
		1744	RETVAL
1031		1745
1032	/* set up @_ -- ugly */
1033	av_clear (defav);
1034	av_fill (defav, items - 1);
1035	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));
1040	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));
1041	SvREFCNT_dec (sv);
1042
1043	transfer (aTHX_ prev, next, 0);
1044		1746
1045	MODULE = Coro::State PACKAGE = Coro	1747	MODULE = Coro::State PACKAGE = Coro
1046		1748
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1749	BOOT:
1050	{	1750	{
1051	int i;	1751	int i;
		1752
		1753	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1754	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1755	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1756
		1757	coro_current = coro_get_sv ("Coro::current", FALSE);
		1758	SvREADONLY_on (coro_current);
		1759
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1760	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1761
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1762	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1763	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1764	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1765	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1766	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1767	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1768
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1769	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065	coro_ready[i] = newAV ();	1770	coro_ready[i] = newAV ();
1066		1771
1067	{	1772	{
1068	SV *sv = perl_get_sv("Coro::API", 1);	1773	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1774	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1069		1775
1070	coroapi.schedule = api_schedule;	1776	coroapi.schedule = api_schedule;
1071	coroapi.cede = api_cede;	1777	coroapi.cede = api_cede;
		1778	coroapi.cede_notself = api_cede_notself;
1072	coroapi.ready = api_ready;	1779	coroapi.ready = api_ready;
		1780	coroapi.is_ready = api_is_ready;
1073	coroapi.nready = &coro_nready;	1781	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1782	coroapi.current = coro_current;
1075		1783
1076	GCoroAPI = &coroapi;	1784	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1785	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1786	SvREADONLY_on (sv);
1079	}	1787	}
1080	}	1788	}
1081		1789
1082	#if !PERL_MICRO
1083
1084	void	1790	void
1085	ready(self)	1791	_set_current (SV *current)
1086	SV * self
1087	PROTOTYPE: $	1792	PROTOTYPE: $
1088	CODE:	1793	CODE:
1089	api_ready (self);	1794	SvREFCNT_dec (SvRV (coro_current));
1090		1795	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1091	#endif
1092		1796
1093	int	1797	int
		1798	prio (Coro::State coro, int newprio = 0)
		1799	ALIAS:
		1800	nice = 1
		1801	CODE:
		1802	{
		1803	RETVAL = coro->prio;
		1804
		1805	if (items > 1)
		1806	{
		1807	if (ix)
		1808	newprio = coro->prio - newprio;
		1809
		1810	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1811	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1812
		1813	coro->prio = newprio;
		1814	}
		1815	}
		1816	OUTPUT:
		1817	RETVAL
		1818
		1819	SV *
		1820	ready (SV *self)
		1821	PROTOTYPE: $
		1822	CODE:
		1823	RETVAL = boolSV (api_ready (self));
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	int
1094	nready(...)	1828	nready (...)
1095	PROTOTYPE:	1829	PROTOTYPE:
1096	CODE:	1830	CODE:
1097	RETVAL = coro_nready;	1831	RETVAL = coro_nready;
1098	OUTPUT:	1832	OUTPUT:
1099	RETVAL	1833	RETVAL
1100		1834
1101	void	1835	void
1102	schedule(...)	1836	throw (Coro::State self, SV *throw = &PL_sv_undef)
1103	PROTOTYPE:	1837	PROTOTYPE: $;$
		1838	CODE:
		1839	SvREFCNT_dec (self->throw);
		1840	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1841
		1842	# for async_pool speedup
		1843	void
		1844	_pool_1 (SV *cb)
1104	CODE:	1845	CODE:
1105	api_schedule ();	1846	{
		1847	struct coro *coro = SvSTATE (coro_current);
		1848	HV hv = (HV )SvRV (coro_current);
		1849	AV *defav = GvAV (PL_defgv);
		1850	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1851	AV *invoke_av;
		1852	int i, len;
		1853
		1854	if (!invoke)
		1855	croak ("\3async_pool terminate\2\n");
		1856
		1857	SvREFCNT_dec (coro->saved_deffh);
		1858	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1859
		1860	hv_store (hv, "desc", sizeof ("desc") - 1,
		1861	newSVpvn (strpair ("[async_pool]")), 0);
		1862
		1863	invoke_av = (AV *)SvRV (invoke);
		1864	len = av_len (invoke_av);
		1865
		1866	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1867
		1868	if (len > 0)
		1869	{
		1870	av_fill (defav, len - 1);
		1871	for (i = 0; i < len; ++i)
		1872	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1873	}
		1874
		1875	SvREFCNT_dec (invoke);
		1876	}
1106		1877
1107	void	1878	void
1108	cede(...)	1879	_pool_2 (SV *cb)
1109	PROTOTYPE:
1110	CODE:	1880	CODE:
1111	api_cede ();	1881	{
		1882	struct coro *coro = SvSTATE (coro_current);
1112		1883
1113	# and these are hacks	1884	sv_setsv (cb, &PL_sv_undef);
		1885
		1886	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1887	coro->saved_deffh = 0;
		1888
		1889	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1890	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1891	croak ("\3async_pool terminate\2\n");
		1892
		1893	av_clear (GvAV (PL_defgv));
		1894	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1895	newSVpvn (strpair ("[async_pool idle]")), 0);
		1896
		1897	coro->prio = 0;
		1898
		1899	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1900	api_trace (coro_current, 0);
		1901
		1902	av_push (av_async_pool, newSVsv (coro_current));
		1903	}
		1904
		1905
		1906	MODULE = Coro::State PACKAGE = Coro::AIO
		1907
1114	SV *	1908	SV *
1115	_aio_get_state ()	1909	_get_state ()
1116	CODE:	1910	CODE:
1117	{	1911	{
1118	struct {	1912	struct io_state *data;
1119	int errorno;
1120	int laststype;
1121	int laststatval;
1122	Stat_t statcache;
1123	} data;
1124		1913
		1914	RETVAL = newSV (sizeof (struct io_state));
		1915	data = (struct io_state *)SvPVX (RETVAL);
		1916	SvCUR_set (RETVAL, sizeof (struct io_state));
		1917	SvPOK_only (RETVAL);
		1918
1125	data.errorno = errno;	1919	data->errorno = errno;
1126	data.laststype = PL_laststype;	1920	data->laststype = PL_laststype;
1127	data.laststatval = PL_laststatval;	1921	data->laststatval = PL_laststatval;
1128	data.statcache = PL_statcache;	1922	data->statcache = PL_statcache;
1129
1130	RETVAL = newSVpvn ((char *)&data, sizeof data);
1131	}	1923	}
1132	OUTPUT:	1924	OUTPUT:
1133	RETVAL	1925	RETVAL
1134		1926
1135	void	1927	void
1136	_aio_set_state (char *data_)	1928	_set_state (char *data_)
1137	PROTOTYPE: $	1929	PROTOTYPE: $
1138	CODE:	1930	CODE:
1139	{	1931	{
1140	struct {	1932	struct io_state data = (void )data_;
1141	int errorno;
1142	int laststype;
1143	int laststatval;
1144	Stat_t statcache;
1145	} data = (void )data_;
1146		1933
1147	errno = data->errorno;	1934	errno = data->errorno;
1148	PL_laststype = data->laststype;	1935	PL_laststype = data->laststype;
1149	PL_laststatval = data->laststatval;	1936	PL_laststatval = data->laststatval;
1150	PL_statcache = data->statcache;	1937	PL_statcache = data->statcache;
1151	}	1938	}
		1939

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Comparing Coro/Coro/State.xs (file contents): Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs. Revision 1.202 by root, Mon Oct 8 02:50:23 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.202 by root, Mon Oct 8 02:50:23 2007 UTC