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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.198 by root, Sun Oct 7 03:58:37 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 */
33		77	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	78	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	79	#endif
44	#endif
45		80
46	#define SUB_INIT "Coro::State::initialize"	81	/* 5.8.8 */
47	#define UCORO_STATE "_coro_state"	82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
48		88
49	/* The next macro should declare a variable stacklevel that contains and approximation	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
50	* to the current C stack pointer. Its property is that it changes with each call	90	# undef CORO_STACKGUARD
51	* and should be unique. */	91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
		104	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
53		106
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		108
56	#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))
57		123
58	#include "CoroAPI.h"	124	#include "CoroAPI.h"
59		125
60	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
…		…
64	#else	130	#else
65	# define LOCK (void)0	131	# define LOCK (void)0
66	# define UNLOCK (void)0	132	# define UNLOCK (void)0
67	#endif	133	#endif
68		134
		135	/* helper storage struct for Coro::AIO */
		136	struct io_state
		137	{
		138	int errorno;
		139	I32 laststype;
		140	int laststatval;
		141	Stat_t statcache;
		142	};
		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
70	static AV main_mainstack; / used to differentiate between $main and others */	146	static AV main_mainstack; / used to differentiate between $main and others */
		147	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	148	static HV coro_state_stash, coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV coro_mortal; / will be freed after next transfer */	149	static SV coro_mortal; / will be freed after next transfer */
75		150
76	/* this is actually not only the c stack but also c registers etc... */	151	static GV irsgv; / $/ */
		152	static GV stdoutgv; / STDOUT /
		153
		154	/* async_pool helper stuff */
		155	static SV *sv_pool_rss;
		156	static SV *sv_pool_size;
		157	static AV *av_async_pool;
		158
		159	static struct coro_cctx *cctx_first;
		160	static int cctx_count, cctx_idle;
		161
		162	enum {
		163	CC_MAPPED = 0x01,
		164	CC_NOREUSE = 0x02, /* throw this away after tracing */
		165	CC_TRACE = 0x04,
		166	CC_TRACE_SUB = 0x08, /* trace sub calls */
		167	CC_TRACE_LINE = 0x10, /* trace each statement */
		168	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		169	};
		170
		171	/* this is a structure representing a c-level coroutine */
		172	typedef struct coro_cctx {
		173	struct coro_cctx *next;
		174
		175	/* the stack */
		176	void *sptr;
		177	size_t ssize;
		178
		179	/* cpu state */
		180	void idle_sp; / sp of top-level transfer/schedule/cede call */
		181	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		182	JMPENV *top_env;
		183	coro_context cctx;
		184
		185	#if CORO_USE_VALGRIND
		186	int valgrind_id;
		187	#endif
		188	unsigned char flags;
		189	} coro_cctx;
		190
		191	enum {
		192	CF_RUNNING = 0x0001, /* coroutine is running */
		193	CF_READY = 0x0002, /* coroutine is ready */
		194	CF_NEW = 0x0004, /* has never been switched to */
		195	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		196	};
		197
		198	/* the structure where most of the perl state is stored, overlaid on the cxstack */
77	typedef struct {	199	typedef struct {
78	int refcnt; /* pointer reference counter */	200	SV *defsv;
79	int usecnt; /* shared by how many coroutines */	201	AV *defav;
80	int gencnt; /* generation counter */	202	SV *errsv;
		203	SV *irsgv;
		204	#define VAR(name,type) type name;
		205	# include "state.h"
		206	#undef VAR
		207	} perl_slots;
81		208
82	coro_context cctx;	209	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83		210
84	void *sptr;	211	/* this is a structure representing a perl-level coroutine */
85	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87
88	struct coro {	212	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	213	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	214	coro_cctx *cctx;
91		215
92	/* the optional C context */	216	/* process data */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;	217	AV *mainstack;
110	SV **stack_sp;	218	perl_slots slot; / basically the saved sp */
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136		219
137	/* data associated with this coroutine (initial args) */	220	/* data associated with this coroutine (initial args) */
138	AV *args;	221	AV *args;
		222	int refcnt;
		223	int flags; /* CF_ flags */
		224
		225	/* statistics */
		226	int usecount; /* number of transfers to this coro */
		227
		228	/* coro process data */
		229	int prio;
		230	SV *throw;
		231
		232	/* async_pool */
		233	SV *saved_deffh;
		234
		235	/* linked list */
		236	struct coro next, prev;
		237	HV hv; / the perl hash associated with this coro, if any */
139	};	238	};
140		239
141	typedef struct coro *Coro__State;	240	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	241	typedef struct coro *Coro__State_or_hashref;
143		242
		243	/ Coro ******************************************************************/
		244
		245	#define PRIO_MAX 3
		246	#define PRIO_HIGH 1
		247	#define PRIO_NORMAL 0
		248	#define PRIO_LOW -1
		249	#define PRIO_IDLE -3
		250	#define PRIO_MIN -4
		251
		252	/* for Coro.pm */
		253	static SV *coro_current;
		254	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		255	static int coro_nready;
		256	static struct coro *coro_first;
		257
		258	/ lowlevel stuff ********************************************************/
		259
144	static AV *	260	static AV *
145	coro_clone_padlist (pTHX_ CV *cv)	261	coro_clone_padlist (pTHX_ CV *cv)
146	{	262	{
147	AV *padlist = CvPADLIST (cv);	263	AV *padlist = CvPADLIST (cv);
148	AV newpadlist, newpad;	264	AV newpadlist, newpad;
149		265
150	newpadlist = newAV ();	266	newpadlist = newAV ();
151	AvREAL_off (newpadlist);	267	AvREAL_off (newpadlist);
		268	#if PERL_VERSION_ATLEAST (5,9,0)
		269	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		270	#else
152	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	271	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		272	#endif
153	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	273	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154	--AvFILLp (padlist);	274	--AvFILLp (padlist);
155		275
156	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	276	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157	av_store (newpadlist, 1, (SV *)newpad);	277	av_store (newpadlist, 1, (SV *)newpad);
…		…
200		320
201	#define PERL_MAGIC_coro PERL_MAGIC_ext	321	#define PERL_MAGIC_coro PERL_MAGIC_ext
202		322
203	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	323	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
204		324
		325	#define CORO_MAGIC(cv) \
		326	SvMAGIC (cv) \
		327	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		328	? SvMAGIC (cv) \
		329	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		330	: 0
		331
		332	static struct coro *
		333	SvSTATE_ (pTHX_ SV *coro)
		334	{
		335	HV *stash;
		336	MAGIC *mg;
		337
		338	if (SvROK (coro))
		339	coro = SvRV (coro);
		340
		341	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		342	croak ("Coro::State object required");
		343
		344	stash = SvSTASH (coro);
		345	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		346	{
		347	/* very slow, but rare, check */
		348	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		349	croak ("Coro::State object required");
		350	}
		351
		352	mg = CORO_MAGIC (coro);
		353	return (struct coro *)mg->mg_ptr;
		354	}
		355
		356	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		357
205	/* the next two functions merely cache the padlists */	358	/* the next two functions merely cache the padlists */
206	static void	359	static void
207	get_padlist (pTHX_ CV *cv)	360	get_padlist (pTHX_ CV *cv)
208	{	361	{
209	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	362	MAGIC *mg = CORO_MAGIC (cv);
		363	AV *av;
210		364
211	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	365	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
212	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	366	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
213	else	367	else
214	{	368	{
215	#if 0	369	#if CORO_PREFER_PERL_FUNCTIONS
216	/* this should work - but it doesn't :( */	370	/* this is probably cleaner, but also slower? */
217	CV *cp = Perl_cv_clone (aTHX_ cv);	371	CV *cp = Perl_cv_clone (cv);
218	CvPADLIST (cv) = CvPADLIST (cp);	372	CvPADLIST (cv) = CvPADLIST (cp);
219	CvPADLIST (cp) = 0;	373	CvPADLIST (cp) = 0;
220	SvREFCNT_dec (cp);	374	SvREFCNT_dec (cp);
221	#else	375	#else
222	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	376	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
225	}	379	}
226		380
227	static void	381	static void
228	put_padlist (pTHX_ CV *cv)	382	put_padlist (pTHX_ CV *cv)
229	{	383	{
230	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	384	MAGIC *mg = CORO_MAGIC (cv);
		385	AV *av;
231		386
232	if (!mg)	387	if (expect_false (!mg))
233	{	388	{
234	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	389	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
235	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	390	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
236	mg->mg_virtual = &vtbl_coro;	391	mg->mg_virtual = &vtbl_coro;
237	mg->mg_obj = (SV *)newAV ();	392	mg->mg_obj = (SV *)newAV ();
238	}	393	}
239		394
240	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	395	av = (AV *)mg->mg_obj;
241	}
242		396
243	#define SB do {	397	if (expect_false (AvFILLp (av) >= AvMAX (av)))
244	#define SE } while (0)	398	av_extend (av, AvMAX (av) + 1);
245		399
246	#define LOAD(state) load_state(aTHX_ (state));	400	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
247	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	401	}
248		402
249	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	403	/ load & save, init *****************************************************/
250		404
251	static void	405	static void
252	load_state(pTHX_ Coro__State c)	406	load_perl (pTHX_ Coro__State c)
253	{	407	{
254	PL_dowarn = c->dowarn;	408	perl_slots *slot = c->slot;
255	PL_in_eval = c->in_eval;	409	c->slot = 0;
256		410
257	PL_curstackinfo = c->curstackinfo;
258	PL_curstack = c->curstack;
259	PL_mainstack = c->mainstack;	411	PL_mainstack = c->mainstack;
260	PL_stack_sp = c->stack_sp;
261	PL_op = c->op;
262	PL_curpad = c->curpad;
263	PL_comppad = c->comppad;
264	PL_compcv = c->compcv;
265	PL_stack_base = c->stack_base;
266	PL_stack_max = c->stack_max;
267	PL_tmps_stack = c->tmps_stack;
268	PL_tmps_floor = c->tmps_floor;
269	PL_tmps_ix = c->tmps_ix;
270	PL_tmps_max = c->tmps_max;
271	PL_markstack = c->markstack;
272	PL_markstack_ptr = c->markstack_ptr;
273	PL_markstack_max = c->markstack_max;
274	PL_scopestack = c->scopestack;
275	PL_scopestack_ix = c->scopestack_ix;
276	PL_scopestack_max = c->scopestack_max;
277	PL_savestack = c->savestack;
278	PL_savestack_ix = c->savestack_ix;
279	PL_savestack_max = c->savestack_max;
280	#if PERL_VERSION < 9
281	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;
284	#endif
285	PL_curpm = c->curpm;
286	PL_curcop = c->curcop;
287	PL_top_env = c->top_env;
288		412
289	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	413	GvSV (PL_defgv) = slot->defsv;
290	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	414	GvAV (PL_defgv) = slot->defav;
291	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	415	GvSV (PL_errgv) = slot->errsv;
		416	GvSV (irsgv) = slot->irsgv;
		417
		418	#define VAR(name,type) PL_ ## name = slot->name;
		419	# include "state.h"
		420	#undef VAR
292		421
293	{	422	{
294	dSP;	423	dSP;
		424
295	CV *cv;	425	CV *cv;
296		426
297	/* now do the ugly restore mess */	427	/* now do the ugly restore mess */
298	while ((cv = (CV *)POPs))	428	while (expect_true (cv = (CV *)POPs))
299	{	429	{
300	AV padlist = (AV )POPs;
301
302	if (padlist)
303	{
304	put_padlist (aTHX_ cv); /* mark this padlist as available */	430	put_padlist (aTHX_ cv); /* mark this padlist as available */
305	CvPADLIST(cv) = padlist;	431	CvDEPTH (cv) = PTR2IV (POPs);
306	}	432	CvPADLIST (cv) = (AV *)POPs;
307
308	++CvDEPTH(cv);
309	}	433	}
310		434
311	PUTBACK;	435	PUTBACK;
312	}	436	}
313	}	437	}
314		438
315	static void	439	static void
316	save_state(pTHX_ Coro__State c, int flags)	440	save_perl (pTHX_ Coro__State c)
317	{	441	{
318	{	442	{
319	dSP;	443	dSP;
320	I32 cxix = cxstack_ix;	444	I32 cxix = cxstack_ix;
321	PERL_CONTEXT *ccstk = cxstack;	445	PERL_CONTEXT *ccstk = cxstack;
…		…
324	/*	448	/*
325	* the worst thing you can imagine happens first - we have to save	449	* the worst thing you can imagine happens first - we have to save
326	* (and reinitialize) all cv's in the whole callchain :(	450	* (and reinitialize) all cv's in the whole callchain :(
327	*/	451	*/
328		452
329	PUSHs (Nullsv);	453	XPUSHs (Nullsv);
330	/* this loop was inspired by pp_caller */	454	/* this loop was inspired by pp_caller */
331	for (;;)	455	for (;;)
332	{	456	{
333	while (cxix >= 0)	457	while (expect_true (cxix >= 0))
334	{	458	{
335	PERL_CONTEXT *cx = &ccstk[cxix--];	459	PERL_CONTEXT *cx = &ccstk[cxix--];
336		460
337	if (CxTYPE(cx) == CXt_SUB)	461	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
338	{	462	{
339	CV *cv = cx->blk_sub.cv;	463	CV *cv = cx->blk_sub.cv;
		464
340	if (CvDEPTH(cv))	465	if (expect_true (CvDEPTH (cv)))
341	{	466	{
342	EXTEND (SP, CvDEPTH(cv)*2);	467	EXTEND (SP, 3);
343
344	while (--CvDEPTH(cv))
345	{
346	/* this tells the restore code to increment CvDEPTH */
347	PUSHs (Nullsv);
348	PUSHs ((SV *)cv);
349	}
350
351	PUSHs ((SV *)CvPADLIST(cv));	468	PUSHs ((SV *)CvPADLIST (cv));
		469	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
352	PUSHs ((SV *)cv);	470	PUSHs ((SV *)cv);
353		471
		472	CvDEPTH (cv) = 0;
354	get_padlist (aTHX_ cv);	473	get_padlist (aTHX_ cv);
355	}	474	}
356	}	475	}
357	#ifdef CXt_FORMAT
358	else if (CxTYPE(cx) == CXt_FORMAT)
359	{
360	/* I never used formats, so how should I know how these are implemented? */
361	/* my bold guess is as a simple, plain sub... */
362	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
363	}
364	#endif
365	}	476	}
366		477
367	if (top_si->si_type == PERLSI_MAIN)	478	if (expect_true (top_si->si_type == PERLSI_MAIN))
368	break;	479	break;
369		480
370	top_si = top_si->si_prev;	481	top_si = top_si->si_prev;
371	ccstk = top_si->si_cxstack;	482	ccstk = top_si->si_cxstack;
372	cxix = top_si->si_cxix;	483	cxix = top_si->si_cxix;
373	}	484	}
374		485
375	PUTBACK;	486	PUTBACK;
376	}	487	}
377		488
378	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	489	/* allocate some space on the context stack for our purposes */
379	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	490	{
380	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	491	/* we manually unroll here, as usually 2 slots is enough */
		492	int i;
		493	if (SLOT_COUNT >= 1) CXINC;
		494	if (SLOT_COUNT >= 2) CXINC;
		495	if (SLOT_COUNT >= 3) CXINC;
		496	for (i = 3; i < SLOT_COUNT; ++i)
		497	CXINC;
381		498
382	c->dowarn = PL_dowarn;	499	cxstack_ix -= SLOT_COUNT; /* undo allocation */
383	c->in_eval = PL_in_eval;	500	}
384		501
385	c->curstackinfo = PL_curstackinfo;
386	c->curstack = PL_curstack;
387	c->mainstack = PL_mainstack;	502	c->mainstack = PL_mainstack;
388	c->stack_sp = PL_stack_sp;	503
389	c->op = PL_op;	504	{
390	c->curpad = PL_curpad;	505	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
391	c->comppad = PL_comppad;	506
392	c->compcv = PL_compcv;	507	slot->defav = GvAV (PL_defgv);
393	c->stack_base = PL_stack_base;	508	slot->defsv = DEFSV;
394	c->stack_max = PL_stack_max;	509	slot->errsv = ERRSV;
395	c->tmps_stack = PL_tmps_stack;	510	slot->irsgv = GvSV (irsgv);
396	c->tmps_floor = PL_tmps_floor;	511
397	c->tmps_ix = PL_tmps_ix;	512	#define VAR(name,type) slot->name = PL_ ## name;
398	c->tmps_max = PL_tmps_max;	513	# include "state.h"
399	c->markstack = PL_markstack;	514	#undef VAR
400	c->markstack_ptr = PL_markstack_ptr;	515	}
401	c->markstack_max = PL_markstack_max;
402	c->scopestack = PL_scopestack;
403	c->scopestack_ix = PL_scopestack_ix;
404	c->scopestack_max = PL_scopestack_max;
405	c->savestack = PL_savestack;
406	c->savestack_ix = PL_savestack_ix;
407	c->savestack_max = PL_savestack_max;
408	#if PERL_VERSION < 9
409	c->retstack = PL_retstack;
410	c->retstack_ix = PL_retstack_ix;
411	c->retstack_max = PL_retstack_max;
412	#endif
413	c->curpm = PL_curpm;
414	c->curcop = PL_curcop;
415	c->top_env = PL_top_env;
416	}	516	}
417		517
418	/*	518	/*
419	* allocate various perl stacks. This is an exact copy	519	* allocate various perl stacks. This is an exact copy
420	* of perl.c:init_stacks, except that it uses less memory	520	* of perl.c:init_stacks, except that it uses less memory
421	* on the (sometimes correct) assumption that coroutines do	521	* on the (sometimes correct) assumption that coroutines do
422	* not usually need a lot of stackspace.	522	* not usually need a lot of stackspace.
423	*/	523	*/
		524	#if CORO_PREFER_PERL_FUNCTIONS
		525	# define coro_init_stacks init_stacks
		526	#else
424	static void	527	static void
425	coro_init_stacks (pTHX)	528	coro_init_stacks (pTHX)
426	{	529	{
427	LOCK;	530	PL_curstackinfo = new_stackinfo(32, 8);
428
429	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
430	PL_curstackinfo->si_type = PERLSI_MAIN;	531	PL_curstackinfo->si_type = PERLSI_MAIN;
431	PL_curstack = PL_curstackinfo->si_stack;	532	PL_curstack = PL_curstackinfo->si_stack;
432	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	533	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433		534
434	PL_stack_base = AvARRAY(PL_curstack);	535	PL_stack_base = AvARRAY(PL_curstack);
435	PL_stack_sp = PL_stack_base;	536	PL_stack_sp = PL_stack_base;
436	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	537	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
437		538
438	New(50,PL_tmps_stack,96,SV*);	539	New(50,PL_tmps_stack,32,SV*);
439	PL_tmps_floor = -1;	540	PL_tmps_floor = -1;
440	PL_tmps_ix = -1;	541	PL_tmps_ix = -1;
441	PL_tmps_max = 96;	542	PL_tmps_max = 32;
442		543
443	New(54,PL_markstack,16,I32);	544	New(54,PL_markstack,16,I32);
444	PL_markstack_ptr = PL_markstack;	545	PL_markstack_ptr = PL_markstack;
445	PL_markstack_max = PL_markstack + 16;	546	PL_markstack_max = PL_markstack + 16;
446		547
447	#ifdef SET_MARK_OFFSET	548	#ifdef SET_MARK_OFFSET
448	SET_MARK_OFFSET;	549	SET_MARK_OFFSET;
449	#endif	550	#endif
450		551
451	New(54,PL_scopestack,16,I32);	552	New(54,PL_scopestack,8,I32);
452	PL_scopestack_ix = 0;	553	PL_scopestack_ix = 0;
453	PL_scopestack_max = 16;	554	PL_scopestack_max = 8;
454		555
455	New(54,PL_savestack,96,ANY);	556	New(54,PL_savestack,24,ANY);
456	PL_savestack_ix = 0;	557	PL_savestack_ix = 0;
457	PL_savestack_max = 96;	558	PL_savestack_max = 24;
458		559
459	#if PERL_VERSION < 9	560	#if !PERL_VERSION_ATLEAST (5,9,0)
460	New(54,PL_retstack,8,OP*);	561	New(54,PL_retstack,4,OP*);
461	PL_retstack_ix = 0;	562	PL_retstack_ix = 0;
462	PL_retstack_max = 8;	563	PL_retstack_max = 4;
463	#endif	564	#endif
464
465	UNLOCK;
466	}	565	}
		566	#endif
467		567
468	/*	568	/*
469	* destroy the stacks, the callchain etc...	569	* destroy the stacks, the callchain etc...
470	*/	570	*/
471	static void	571	static void
472	destroy_stacks(pTHX)	572	coro_destroy_stacks (pTHX)
473	{	573	{
474	if (!IN_DESTRUCT)
475	{
476	/* is this ugly, I ask? */
477	LEAVE_SCOPE (0);
478
479	/* sure it is, but more important: is it correct?? :/ */
480	FREETMPS;
481
482	/POPSTACK_TO (PL_mainstack);//D//use/
483	}
484
485	while (PL_curstackinfo->si_next)	574	while (PL_curstackinfo->si_next)
486	PL_curstackinfo = PL_curstackinfo->si_next;	575	PL_curstackinfo = PL_curstackinfo->si_next;
487		576
488	while (PL_curstackinfo)	577	while (PL_curstackinfo)
489	{	578	{
490	PERL_SI *p = PL_curstackinfo->si_prev;	579	PERL_SI *p = PL_curstackinfo->si_prev;
491		580
492	{ /D//remove/
493	dSP;
494	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
495	PUTBACK; /* possibly superfluous */
496	}
497
498	if (!IN_DESTRUCT)	581	if (!IN_DESTRUCT)
499	{
500	dounwind (-1);/D//remove/
501	SvREFCNT_dec (PL_curstackinfo->si_stack);	582	SvREFCNT_dec (PL_curstackinfo->si_stack);
502	}
503		583
504	Safefree (PL_curstackinfo->si_cxstack);	584	Safefree (PL_curstackinfo->si_cxstack);
505	Safefree (PL_curstackinfo);	585	Safefree (PL_curstackinfo);
506	PL_curstackinfo = p;	586	PL_curstackinfo = p;
507	}	587	}
508		588
509	Safefree (PL_tmps_stack);	589	Safefree (PL_tmps_stack);
510	Safefree (PL_markstack);	590	Safefree (PL_markstack);
511	Safefree (PL_scopestack);	591	Safefree (PL_scopestack);
512	Safefree (PL_savestack);	592	Safefree (PL_savestack);
513	#if PERL_VERSION < 9	593	#if !PERL_VERSION_ATLEAST (5,9,0)
514	Safefree (PL_retstack);	594	Safefree (PL_retstack);
515	#endif	595	#endif
516	}	596	}
517		597
518	static void	598	static size_t
519	allocate_stack (Coro__State ctx, int alloc)	599	coro_rss (pTHX_ struct coro *coro)
520	{	600	{
521	coro_stack *stack;	601	size_t rss = sizeof (*coro);
522		602
523	New (0, stack, 1, coro_stack);	603	if (coro->mainstack)
524
525	stack->refcnt = 1;
526	stack->usecnt = 1;
527	stack->gencnt = ctx->gencnt = 0;
528
529	if (alloc)
530	{	604	{
531	#if HAVE_MMAP	605	perl_slots tmp_slot;
532	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */	606	perl_slots *slot;
533	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	607
534	if (stack->sptr == (void *)-1)	608	if (coro->flags & CF_RUNNING)
535	#endif
536	{	609	{
537	stack->ssize = - (STACKSIZE * (long)sizeof (long));	610	slot = &tmp_slot;
538	New (0, stack->sptr, STACKSIZE, long);	611
		612	#define VAR(name,type) slot->name = PL_ ## name;
		613	# include "state.h"
		614	#undef VAR
539	}	615	}
540	}
541	else
542	stack->sptr = 0;
543
544	ctx->stack = stack;
545	}
546
547	static void
548	deallocate_stack (Coro__State ctx)
549	{
550	coro_stack *stack = ctx->stack;
551
552	ctx->stack = 0;
553
554	if (stack)
555	{
556	if (!--stack->refcnt)
557	{
558	#ifdef HAVE_MMAP
559	if (stack->ssize > 0 && stack->sptr)
560	munmap (stack->sptr, stack->ssize);
561	else	616	else
562	#endif	617	slot = coro->slot;
563	Safefree (stack->sptr);
564		618
565	Safefree (stack);	619	rss += sizeof (slot->curstackinfo);
566	}	620	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
567	else if (ctx->gencnt == stack->gencnt)	621	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
568	--stack->usecnt;	622	rss += slot->tmps_max * sizeof (SV *);
569	}	623	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
570	}	624	rss += slot->scopestack_max * sizeof (I32);
		625	rss += slot->savestack_max * sizeof (ANY);
571		626
		627	#if !PERL_VERSION_ATLEAST (5,9,0)
		628	rss += slot->retstack_max * sizeof (OP *);
		629	#endif
		630	}
		631
		632	return rss;
		633	}
		634
		635	/ coroutine stack handling **********************************************/
		636
572	static void	637	static void
573	setup_coro (void *arg)	638	coro_setup (pTHX_ struct coro *coro)
574	{	639	{
575	/*	640	/*
576	* emulate part of the perl startup here.	641	* emulate part of the perl startup here.
577	*/	642	*/
		643	coro_init_stacks (aTHX);
		644
		645	PL_runops = RUNOPS_DEFAULT;
		646	PL_curcop = &PL_compiling;
		647	PL_in_eval = EVAL_NULL;
		648	PL_comppad = 0;
		649	PL_curpm = 0;
		650	PL_curpad = 0;
		651	PL_localizing = 0;
		652	PL_dirty = 0;
		653	PL_restartop = 0;
		654	PL_diehook = 0;
		655	PL_warnhook = 0;
		656
		657	GvSV (PL_defgv) = newSV (0);
		658	GvAV (PL_defgv) = coro->args; coro->args = 0;
		659	GvSV (PL_errgv) = newSV (0);
		660	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		661	PL_rs = newSVsv (GvSV (irsgv));
		662	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		663
		664	{
		665	dSP;
		666	LOGOP myop;
		667
		668	Zero (&myop, 1, LOGOP);
		669	myop.op_next = Nullop;
		670	myop.op_flags = OPf_WANT_VOID;
		671
		672	PUSHMARK (SP);
		673	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		674	PUTBACK;
		675	PL_op = (OP *)&myop;
		676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		677	SPAGAIN;
		678	}
		679
		680	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		681	}
		682
		683	static void
		684	coro_destroy (pTHX_ struct coro *coro)
		685	{
		686	if (!IN_DESTRUCT)
		687	{
		688	/* restore all saved variables and stuff */
		689	LEAVE_SCOPE (0);
		690	assert (PL_tmps_floor == -1);
		691
		692	/* free all temporaries */
		693	FREETMPS;
		694	assert (PL_tmps_ix == -1);
		695
		696	/* unwind all extra stacks */
		697	POPSTACK_TO (PL_mainstack);
		698
		699	/* unwind main stack */
		700	dounwind (-1);
		701	}
		702
		703	SvREFCNT_dec (GvSV (PL_defgv));
		704	SvREFCNT_dec (GvAV (PL_defgv));
		705	SvREFCNT_dec (GvSV (PL_errgv));
		706	SvREFCNT_dec (PL_defoutgv);
		707	SvREFCNT_dec (PL_rs);
		708	SvREFCNT_dec (GvSV (irsgv));
		709
		710	SvREFCNT_dec (PL_diehook);
		711	SvREFCNT_dec (PL_warnhook);
		712
		713	SvREFCNT_dec (coro->saved_deffh);
		714	SvREFCNT_dec (coro->throw);
		715
		716	coro_destroy_stacks (aTHX);
		717	}
		718
		719	static void
		720	free_coro_mortal (pTHX)
		721	{
		722	if (expect_true (coro_mortal))
		723	{
		724	SvREFCNT_dec (coro_mortal);
		725	coro_mortal = 0;
		726	}
		727	}
		728
		729	static int
		730	runops_trace (pTHX)
		731	{
		732	COP *oldcop = 0;
		733	int oldcxix = -2;
		734	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		735	coro_cctx *cctx = coro->cctx;
		736
		737	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		738	{
		739	PERL_ASYNC_CHECK ();
		740
		741	if (cctx->flags & CC_TRACE_ALL)
		742	{
		743	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		744	{
		745	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		746	SV bot, top;
		747	AV av = newAV (); / return values */
		748	SV **cb;
		749	dSP;
		750
		751	GV *gv = CvGV (cx->blk_sub.cv);
		752	SV *fullname = sv_2mortal (newSV (0));
		753	if (isGV (gv))
		754	gv_efullname3 (fullname, gv, 0);
		755
		756	bot = PL_stack_base + cx->blk_oldsp + 1;
		757	top = cx->blk_gimme == G_ARRAY ? SP + 1
		758	: cx->blk_gimme == G_SCALAR ? bot + 1
		759	: bot;
		760
		761	av_extend (av, top - bot);
		762	while (bot < top)
		763	av_push (av, SvREFCNT_inc (*bot++));
		764
		765	PL_runops = RUNOPS_DEFAULT;
		766	ENTER;
		767	SAVETMPS;
		768	EXTEND (SP, 3);
		769	PUSHMARK (SP);
		770	PUSHs (&PL_sv_no);
		771	PUSHs (fullname);
		772	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		773	PUTBACK;
		774	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		775	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		776	SPAGAIN;
		777	FREETMPS;
		778	LEAVE;
		779	PL_runops = runops_trace;
		780	}
		781
		782	if (oldcop != PL_curcop)
		783	{
		784	oldcop = PL_curcop;
		785
		786	if (PL_curcop != &PL_compiling)
		787	{
		788	SV **cb;
		789
		790	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		791	{
		792	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		793
		794	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		795	{
		796	runops_proc_t old_runops = PL_runops;
		797	dSP;
		798	GV *gv = CvGV (cx->blk_sub.cv);
		799	SV *fullname = sv_2mortal (newSV (0));
		800
		801	if (isGV (gv))
		802	gv_efullname3 (fullname, gv, 0);
		803
		804	PL_runops = RUNOPS_DEFAULT;
		805	ENTER;
		806	SAVETMPS;
		807	EXTEND (SP, 3);
		808	PUSHMARK (SP);
		809	PUSHs (&PL_sv_yes);
		810	PUSHs (fullname);
		811	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		812	PUTBACK;
		813	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		814	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		815	SPAGAIN;
		816	FREETMPS;
		817	LEAVE;
		818	PL_runops = runops_trace;
		819	}
		820
		821	oldcxix = cxstack_ix;
		822	}
		823
		824	if (cctx->flags & CC_TRACE_LINE)
		825	{
		826	dSP;
		827
		828	PL_runops = RUNOPS_DEFAULT;
		829	ENTER;
		830	SAVETMPS;
		831	EXTEND (SP, 3);
		832	PL_runops = RUNOPS_DEFAULT;
		833	PUSHMARK (SP);
		834	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		835	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		836	PUTBACK;
		837	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		838	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		839	SPAGAIN;
		840	FREETMPS;
		841	LEAVE;
		842	PL_runops = runops_trace;
		843	}
		844	}
		845	}
		846	}
		847	}
		848
		849	TAINT_NOT;
		850	return 0;
		851	}
		852
		853	/* inject a fake call to Coro::State::_cctx_init into the execution */
		854	/* _cctx_init should be careful, as it could be called at almost any time */
		855	/* during execution of a perl program */
		856	static void NOINLINE
		857	prepare_cctx (pTHX_ coro_cctx *cctx)
		858	{
		859	dSP;
		860	LOGOP myop;
		861
		862	PL_top_env = &PL_start_env;
		863
		864	if (cctx->flags & CC_TRACE)
		865	PL_runops = runops_trace;
		866
		867	Zero (&myop, 1, LOGOP);
		868	myop.op_next = PL_op;
		869	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		870
		871	PUSHMARK (SP);
		872	EXTEND (SP, 2);
		873	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		874	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		875	PUTBACK;
		876	PL_op = (OP *)&myop;
		877	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		878	SPAGAIN;
		879	}
		880
		881	/*
		882	* this is a _very_ stripped down perl interpreter ;)
		883	*/
		884	static void
		885	coro_run (void *arg)
		886	{
578	dTHX;	887	dTHX;
579	dSP;
580	Coro__State ctx = (Coro__State)arg;
581	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
582		888
583	coro_init_stacks (aTHX);	889	/* coro_run is the alternative tail of transfer(), so unlock here. */
584	/PL_curcop = 0;/	890	UNLOCK;
585	/PL_in_eval = PL_in_eval;/ /* inherit */
586	SvREFCNT_dec (GvAV (PL_defgv));
587	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
588		891
589	SPAGAIN;	892	/* we now skip the entersub that lead to transfer() */
		893	PL_op = PL_op->op_next;
590		894
591	if (ctx->stack)	895	/* inject a fake subroutine call to cctx_init */
592	{	896	prepare_cctx (aTHX_ (coro_cctx *)arg);
593	ctx->cursp = 0;
594		897
595	PUSHMARK(SP);	898	/* somebody or something will hit me for both perl_run and PL_restartop */
596	PUTBACK;	899	PL_restartop = PL_op;
597	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);	900	perl_run (PL_curinterp);
598		901
599	if (SvTRUE (ERRSV))	902	/*
600	croak (NULL);	903	* If perl-run returns we assume exit() was being called or the coro
601	else	904	* fell off the end, which seems to be the only valid (non-bug)
602	croak ("FATAL: CCTXT coroutine returned!");	905	* reason for perl_run to return. We try to exit by jumping to the
		906	* bootstrap-time "top" top_env, as we cannot restore the "main"
		907	* coroutine as Coro has no such concept
		908	*/
		909	PL_top_env = main_top_env;
		910	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		911	}
		912
		913	static coro_cctx *
		914	cctx_new ()
		915	{
		916	coro_cctx *cctx;
		917	void *stack_start;
		918	size_t stack_size;
		919
		920	++cctx_count;
		921
		922	Newz (0, cctx, 1, coro_cctx);
		923
		924	#if HAVE_MMAP
		925
		926	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		927	/* mmap supposedly does allocate-on-write for us */
		928	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		929
		930	if (cctx->sptr != (void *)-1)
		931	{
		932	# if CORO_STACKGUARD
		933	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		934	# endif
		935	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		936	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		937	cctx->flags \|= CC_MAPPED;
603	}	938	}
604	else	939	else
605	{	940	#endif
606	UNOP myop;
607
608	PL_op = (OP *)&myop;
609
610	Zero(&myop, 1, UNOP);
611	myop.op_next = Nullop;
612	myop.op_flags = OPf_WANT_VOID;
613
614	PUSHMARK(SP);
615	XPUSHs (sub_init);
616	/*
617	* the next line is slightly wrong, as PL_op->op_next
618	* is actually being executed so we skip the first op.
619	* that doesn't matter, though, since it is only
620	* pp_nextstate and we never return...
621	* ah yes, and I don't care anyways ;)
622	*/
623	PUTBACK;
624	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625	SPAGAIN;
626
627	ENTER; /* necessary e.g. for dounwind */
628	}	941	{
629	}	942	cctx->ssize = coro_stacksize * (long)sizeof (long);
		943	New (0, cctx->sptr, coro_stacksize, long);
630		944
631	static void	945	if (!cctx->sptr)
632	continue_coro (void *arg)	946	{
633	{	947	perror ("FATAL: unable to allocate stack for coroutine");
634	/*	948	_exit (EXIT_FAILURE);
635	* this is a _very_ stripped down perl interpreter ;)	949	}
636	*/
637	dTHX;
638	Coro__State ctx = (Coro__State)arg;
639		950
640	PL_top_env = &ctx->start_env;	951	stack_start = cctx->sptr;
		952	stack_size = cctx->ssize;
		953	}
641		954
642	ctx->cursp = 0;	955	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
643	PL_op = PL_op->op_next;	956	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
644	CALLRUNOPS(aTHX);
645		957
646	abort ();	958	return cctx;
647	}	959	}
648		960
649	static void	961	static void
		962	cctx_destroy (coro_cctx *cctx)
		963	{
		964	if (!cctx)
		965	return;
		966
		967	--cctx_count;
		968
		969	#if CORO_USE_VALGRIND
		970	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		971	#endif
		972
		973	#if HAVE_MMAP
		974	if (cctx->flags & CC_MAPPED)
		975	munmap (cctx->sptr, cctx->ssize);
		976	else
		977	#endif
		978	Safefree (cctx->sptr);
		979
		980	Safefree (cctx);
		981	}
		982
		983	/* wether this cctx should be destructed */
		984	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		985
		986	static coro_cctx *
		987	cctx_get (pTHX)
		988	{
		989	while (expect_true (cctx_first))
		990	{
		991	coro_cctx *cctx = cctx_first;
		992	cctx_first = cctx->next;
		993	--cctx_idle;
		994
		995	if (expect_true (!CCTX_EXPIRED (cctx)))
		996	return cctx;
		997
		998	cctx_destroy (cctx);
		999	}
		1000
		1001	return cctx_new ();
		1002	}
		1003
		1004	static void
		1005	cctx_put (coro_cctx *cctx)
		1006	{
		1007	/* free another cctx if overlimit */
		1008	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1009	{
		1010	coro_cctx *first = cctx_first;
		1011	cctx_first = first->next;
		1012	--cctx_idle;
		1013
		1014	cctx_destroy (first);
		1015	}
		1016
		1017	++cctx_idle;
		1018	cctx->next = cctx_first;
		1019	cctx_first = cctx;
		1020	}
		1021
		1022	/ coroutine switching ***************************************************/
		1023
		1024	static void
		1025	transfer_check (pTHX_ struct coro prev, struct coro next)
		1026	{
		1027	if (expect_true (prev != next))
		1028	{
		1029	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1030	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1031
		1032	if (expect_false (next->flags & CF_RUNNING))
		1033	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1034
		1035	if (expect_false (next->flags & CF_DESTROYED))
		1036	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1037
		1038	if (
		1039	#if PERL_VERSION_ATLEAST (5,9,0)
		1040	expect_false (PL_parser)
		1041	#else
		1042	expect_false (PL_lex_state != LEX_NOTPARSING)
		1043	#endif
		1044	)
		1045	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1046	}
		1047	}
		1048
		1049	/* always use the TRANSFER macro */
		1050	static void NOINLINE
650	transfer (pTHX_ struct coro prev, struct coro next, int flags)	1051	transfer (pTHX_ struct coro prev, struct coro next)
651	{	1052	{
652	dSTACKLEVEL;	1053	dSTACKLEVEL;
653		1054
654	if (prev != next)	1055	/* sometimes transfer is only called to set idle_sp */
		1056	if (expect_false (!next))
		1057	{
		1058	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1059	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
655	{	1060	}
656	if (next->mainstack)	1061	else if (expect_true (prev != next))
		1062	{
		1063	coro_cctx *prev__cctx;
		1064
		1065	if (expect_false (prev->flags & CF_NEW))
657	{	1066	{
658	LOCK;	1067	/* create a new empty context */
659	SAVE (prev, flags);	1068	Newz (0, prev->cctx, 1, coro_cctx);
660	LOAD (next);	1069	prev->flags &= ~CF_NEW;
661	UNLOCK;	1070	prev->flags \|= CF_RUNNING;
662
663	/* mark this state as in-use */
664	next->mainstack = 0;
665	next->tmps_ix = -2;
666
667	/* stacklevel changed? if yes, grab the stack for us! */
668	if (flags & TRANSFER_SAVE_CCTXT)
669	{
670	if (!prev->stack)
671	allocate_stack (prev, 0);
672	else if (prev->cursp != stacklevel
673	&& prev->stack->usecnt > 1)
674	{
675	prev->gencnt = ++prev->stack->gencnt;
676	prev->stack->usecnt = 1;
677	}
678
679	/* has our stack been invalidated? */
680	if (next->stack && next->stack->gencnt != next->gencnt)
681	{
682	deallocate_stack (next);
683	allocate_stack (next, 1);
684	coro_create (&(next->stack->cctx),
685	continue_coro, (void *)next,
686	next->stack->sptr, labs (next->stack->ssize));
687	}
688
689	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
690	prev->cursp = stacklevel;
691	/* don't add any code here */
692	}
693	else
694	next->cursp = stacklevel;
695	}	1071	}
696	else if (next->tmps_ix == -2)	1072
697	croak ("tried to transfer to running coroutine");	1073	prev->flags &= ~CF_RUNNING;
		1074	next->flags \|= CF_RUNNING;
		1075
		1076	LOCK;
		1077
		1078	if (expect_false (next->flags & CF_NEW))
		1079	{
		1080	/* need to start coroutine */
		1081	next->flags &= ~CF_NEW;
		1082	/* first get rid of the old state */
		1083	save_perl (aTHX_ prev);
		1084	/* setup coroutine call */
		1085	coro_setup (aTHX_ next);
		1086	}
698	else	1087	else
699	{	1088	{
700	LOCK;	1089	/* coroutine already started */
701	SAVE (prev, -1); /* first get rid of the old state */	1090	save_perl (aTHX_ prev);
		1091	load_perl (aTHX_ next);
		1092	}
		1093
		1094	prev__cctx = prev->cctx;
		1095
		1096	/* possibly "free" the cctx */
		1097	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1098	{
		1099	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1100	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1101
		1102	prev->cctx = 0;
		1103
		1104	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1105	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1106	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1107	next->cctx = cctx_get (aTHX);
		1108
		1109	cctx_put (prev__cctx);
		1110	}
		1111
		1112	++next->usecount;
		1113
		1114	if (expect_true (!next->cctx))
		1115	next->cctx = cctx_get (aTHX);
		1116
		1117	if (expect_false (prev__cctx != next->cctx))
		1118	{
		1119	prev__cctx->top_env = PL_top_env;
		1120	PL_top_env = next->cctx->top_env;
		1121	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1122	}
		1123
		1124	free_coro_mortal (aTHX);
702	UNLOCK;	1125	UNLOCK;
703		1126
704	if (flags & TRANSFER_SAVE_CCTXT)	1127	if (expect_false (prev->throw \|\| next->throw))
		1128	{
		1129	struct coro *coro = SvSTATE (coro_current);
		1130
		1131	if (coro->throw)
705	{	1132	{
706	if (!prev->stack)	1133	SV *exception = coro->throw;
707	allocate_stack (prev, 0);	1134	coro->throw = 0;
708		1135	sv_setsv (ERRSV, exception);
709	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710	{
711	PL_top_env = &next->start_env;
712
713	setup_coro (next);
714	next->cursp = stacklevel;
715
716	prev->stack->refcnt++;
717	prev->stack->usecnt++;
718	next->stack = prev->stack;
719	next->gencnt = prev->gencnt;
720	}
721	else
722	{
723	assert (!next->stack);
724	allocate_stack (next, 1);
725	coro_create (&(next->stack->cctx),
726	setup_coro, (void *)next,
727	next->stack->sptr, labs (next->stack->ssize));
728	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729	prev->cursp = stacklevel;
730	/* don't add any code here */
731	}
732	}
733	else
734	{
735	setup_coro (next);	1136	croak (0);
736	next->cursp = stacklevel;
737	}	1137	}
738	}	1138	}
739	}	1139	}
		1140	}
740		1141
741	LOCK;	1142	struct transfer_args
742	if (coro_mortal)	1143	{
743	{	1144	struct coro prev, next;
744	SvREFCNT_dec (coro_mortal);	1145	};
745	coro_mortal = 0;	1146
		1147	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1148	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1149
		1150	/ high level stuff ******************************************************/
		1151
		1152	static int
		1153	coro_state_destroy (pTHX_ struct coro *coro)
		1154	{
		1155	if (coro->flags & CF_DESTROYED)
		1156	return 0;
		1157
		1158	coro->flags \|= CF_DESTROYED;
		1159
		1160	if (coro->flags & CF_READY)
746	}	1161	{
		1162	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1163	/* alternative: look through all ready queues and remove the coro */
		1164	LOCK;
		1165	--coro_nready;
747	UNLOCK;	1166	UNLOCK;
748	}	1167	}
		1168	else
		1169	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
749		1170
750	#define SV_CORO(sv,func) \	1171	if (coro->mainstack && coro->mainstack != main_mainstack)
751	do { \	1172	{
752	if (SvROK (sv)) \	1173	struct coro temp;
753	sv = SvRV (sv); \
754	\
755	if (SvTYPE (sv) == SVt_PVHV) \
756	{ \
757	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
758	\
759	if (!he) \
760	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761	\
762	(sv) = SvRV (HeVAL(he)); \
763	} \
764	\
765	/* must also be changed inside Coro::Cont::yield */ \
766	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
767	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768	\
769	} while(0)
770		1174
771	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1175	if (coro->flags & CF_RUNNING)
		1176	croak ("FATAL: tried to destroy currently running coroutine");
772		1177
		1178	save_perl (aTHX_ &temp);
		1179	load_perl (aTHX_ coro);
		1180
		1181	coro_destroy (aTHX_ coro);
		1182
		1183	load_perl (aTHX_ &temp);
		1184
		1185	coro->slot = 0;
		1186	}
		1187
		1188	cctx_destroy (coro->cctx);
		1189	SvREFCNT_dec (coro->args);
		1190
		1191	if (coro->next) coro->next->prev = coro->prev;
		1192	if (coro->prev) coro->prev->next = coro->next;
		1193	if (coro == coro_first) coro_first = coro->next;
		1194
		1195	return 1;
		1196	}
		1197
773	static void	1198	static int
		1199	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1200	{
		1201	struct coro coro = (struct coro )mg->mg_ptr;
		1202	mg->mg_ptr = 0;
		1203
		1204	coro->hv = 0;
		1205
		1206	if (--coro->refcnt < 0)
		1207	{
		1208	coro_state_destroy (aTHX_ coro);
		1209	Safefree (coro);
		1210	}
		1211
		1212	return 0;
		1213	}
		1214
		1215	static int
		1216	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1217	{
		1218	struct coro coro = (struct coro )mg->mg_ptr;
		1219
		1220	++coro->refcnt;
		1221
		1222	return 0;
		1223	}
		1224
		1225	static MGVTBL coro_state_vtbl = {
		1226	0, 0, 0, 0,
		1227	coro_state_free,
		1228	0,
		1229	#ifdef MGf_DUP
		1230	coro_state_dup,
		1231	#else
		1232	# define MGf_DUP 0
		1233	#endif
		1234	};
		1235
		1236	static void
		1237	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1238	{
		1239	ta->prev = SvSTATE (prev_sv);
		1240	ta->next = SvSTATE (next_sv);
		1241	TRANSFER_CHECK (*ta);
		1242	}
		1243
		1244	static void
774	api_transfer(pTHX_ SV prev, SV next, int flags)	1245	api_transfer (SV prev_sv, SV next_sv)
775	{	1246	{
776	SV_CORO (prev, "Coro::transfer");	1247	dTHX;
777	SV_CORO (next, "Coro::transfer");	1248	struct transfer_args ta;
778		1249
779	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1250	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1251	TRANSFER (ta);
780	}	1252	}
781		1253
782	/ Coro ******************************************************************/	1254	/ Coro ******************************************************************/
783		1255
784	#define PRIO_MAX 3
785	#define PRIO_HIGH 1
786	#define PRIO_NORMAL 0
787	#define PRIO_LOW -1
788	#define PRIO_IDLE -3
789	#define PRIO_MIN -4
790
791	/* for Coro.pm */
792	static GV coro_current, coro_idle;
793	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
794	static int coro_nready;
795
796	static void	1256	static void
797	coro_enq (pTHX_ SV *sv)	1257	coro_enq (pTHX_ SV *coro_sv)
798	{	1258	{
799	SV **xprio;
800	int prio;
801
802	if (SvTYPE (sv) != SVt_PVHV)
803	croak ("Coro::ready tried to enqueue something that is not a coroutine");
804
805	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
806	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808	prio = prio > PRIO_MAX ? PRIO_MAX
809	: prio < PRIO_MIN ? PRIO_MIN
810	: prio;
811
812	av_push (coro_ready [prio - PRIO_MIN], sv);	1259	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
813	coro_nready++;
814	}	1260	}
815		1261
816	static SV *	1262	static SV *
817	coro_deq (pTHX_ int min_prio)	1263	coro_deq (pTHX_ int min_prio)
818	{	1264	{
…		…
821	min_prio -= PRIO_MIN;	1267	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	1268	if (min_prio < 0)
823	min_prio = 0;	1269	min_prio = 0;
824		1270
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1271	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	1272	if (AvFILLp (coro_ready [prio]) >= 0)
827	{
828	coro_nready--;
829	return av_shift (coro_ready[prio]);	1273	return av_shift (coro_ready [prio]);
830	}
831		1274
832	return 0;	1275	return 0;
833	}	1276	}
834		1277
835	static void	1278	static int
836	api_ready (SV *coro)	1279	api_ready (SV *coro_sv)
837	{	1280	{
838	dTHX;	1281	dTHX;
		1282	struct coro *coro;
839		1283
840	if (SvROK (coro))	1284	if (SvROK (coro_sv))
841	coro = SvRV (coro);	1285	coro_sv = SvRV (coro_sv);
		1286
		1287	coro = SvSTATE (coro_sv);
		1288
		1289	if (coro->flags & CF_READY)
		1290	return 0;
		1291
		1292	coro->flags \|= CF_READY;
842		1293
843	LOCK;	1294	LOCK;
844	coro_enq (aTHX_ SvREFCNT_inc (coro));	1295	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1296	++coro_nready;
845	UNLOCK;	1297	UNLOCK;
		1298
		1299	return 1;
		1300	}
		1301
		1302	static int
		1303	api_is_ready (SV *coro_sv)
		1304	{
		1305	dTHX;
		1306	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1307	}
		1308
		1309	static void
		1310	prepare_schedule (pTHX_ struct transfer_args *ta)
		1311	{
		1312	SV prev_sv, next_sv;
		1313
		1314	for (;;)
		1315	{
		1316	LOCK;
		1317	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1318
		1319	/* nothing to schedule: call the idle handler */
		1320	if (expect_false (!next_sv))
		1321	{
		1322	dSP;
		1323	UNLOCK;
		1324
		1325	ENTER;
		1326	SAVETMPS;
		1327
		1328	PUSHMARK (SP);
		1329	PUTBACK;
		1330	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1331
		1332	FREETMPS;
		1333	LEAVE;
		1334	continue;
		1335	}
		1336
		1337	ta->next = SvSTATE (next_sv);
		1338
		1339	/* cannot transfer to destroyed coros, skip and look for next */
		1340	if (expect_false (ta->next->flags & CF_DESTROYED))
		1341	{
		1342	UNLOCK;
		1343	SvREFCNT_dec (next_sv);
		1344	/* coro_nready is already taken care of by destroy */
		1345	continue;
		1346	}
		1347
		1348	--coro_nready;
		1349	UNLOCK;
		1350	break;
		1351	}
		1352
		1353	/* free this only after the transfer */
		1354	prev_sv = SvRV (coro_current);
		1355	ta->prev = SvSTATE (prev_sv);
		1356	TRANSFER_CHECK (*ta);
		1357	assert (ta->next->flags & CF_READY);
		1358	ta->next->flags &= ~CF_READY;
		1359	SvRV_set (coro_current, next_sv);
		1360
		1361	LOCK;
		1362	free_coro_mortal (aTHX);
		1363	coro_mortal = prev_sv;
		1364	UNLOCK;
		1365	}
		1366
		1367	static void
		1368	prepare_cede (pTHX_ struct transfer_args *ta)
		1369	{
		1370	api_ready (coro_current);
		1371	prepare_schedule (aTHX_ ta);
		1372	}
		1373
		1374	static int
		1375	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1376	{
		1377	if (coro_nready)
		1378	{
		1379	SV *prev = SvRV (coro_current);
		1380	prepare_schedule (aTHX_ ta);
		1381	api_ready (prev);
		1382	return 1;
		1383	}
		1384	else
		1385	return 0;
846	}	1386	}
847		1387
848	static void	1388	static void
849	api_schedule (void)	1389	api_schedule (void)
850	{	1390	{
851	dTHX;	1391	dTHX;
		1392	struct transfer_args ta;
852		1393
853	SV prev, next;	1394	prepare_schedule (aTHX_ &ta);
854		1395	TRANSFER (ta);
855	LOCK;
856
857	prev = SvRV (GvSV (coro_current));
858	next = coro_deq (aTHX_ PRIO_MIN);
859
860	if (!next)
861	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
862
863	/* free this only after the transfer */
864	coro_mortal = prev;
865	SV_CORO (prev, "Coro::schedule");
866
867	SvRV (GvSV (coro_current)) = next;
868
869	SV_CORO (next, "Coro::schedule");
870
871	UNLOCK;
872
873	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
874	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
875	}	1396	}
876		1397
877	static void	1398	static int
878	api_cede (void)	1399	api_cede (void)
879	{	1400	{
880	dTHX;	1401	dTHX;
		1402	struct transfer_args ta;
881		1403
882	LOCK;	1404	prepare_cede (aTHX_ &ta);
883	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
884	UNLOCK;
885		1405
886	api_schedule ();	1406	if (expect_true (ta.prev != ta.next))
		1407	{
		1408	TRANSFER (ta);
		1409	return 1;
		1410	}
		1411	else
		1412	return 0;
887	}	1413	}
888		1414
		1415	static int
		1416	api_cede_notself (void)
		1417	{
		1418	dTHX;
		1419	struct transfer_args ta;
		1420
		1421	if (prepare_cede_notself (aTHX_ &ta))
		1422	{
		1423	TRANSFER (ta);
		1424	return 1;
		1425	}
		1426	else
		1427	return 0;
		1428	}
		1429
		1430	static void
		1431	api_trace (SV *coro_sv, int flags)
		1432	{
		1433	dTHX;
		1434	struct coro *coro = SvSTATE (coro_sv);
		1435
		1436	if (flags & CC_TRACE)
		1437	{
		1438	if (!coro->cctx)
		1439	coro->cctx = cctx_new ();
		1440	else if (!(coro->cctx->flags & CC_TRACE))
		1441	croak ("cannot enable tracing on coroutine with custom stack");
		1442
		1443	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1444	}
		1445	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1446	{
		1447	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1448
		1449	if (coro->flags & CF_RUNNING)
		1450	PL_runops = RUNOPS_DEFAULT;
		1451	else
		1452	coro->slot->runops = RUNOPS_DEFAULT;
		1453	}
		1454	}
		1455
889	MODULE = Coro::State PACKAGE = Coro::State	1456	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
890		1457
891	PROTOTYPES: ENABLE	1458	PROTOTYPES: DISABLE
892		1459
893	BOOT:	1460	BOOT:
894	{ /* {} necessary for stoopid perl-5.6.x */	1461	{
895	#ifdef USE_ITHREADS	1462	#ifdef USE_ITHREADS
896	MUTEX_INIT (&coro_mutex);	1463	MUTEX_INIT (&coro_mutex);
897	#endif	1464	#endif
		1465	BOOT_PAGESIZE;
898		1466
899	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1467	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
900	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1468	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1469
901	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1470	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902		1471
903	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1472	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
904	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1473	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
905	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1474	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
906	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1475	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
907		1476
908	main_mainstack = PL_mainstack;	1477	main_mainstack = PL_mainstack;
		1478	main_top_env = PL_top_env;
		1479
		1480	while (main_top_env->je_prev)
		1481	main_top_env = main_top_env->je_prev;
909		1482
910	coroapi.ver = CORO_API_VERSION;	1483	coroapi.ver = CORO_API_VERSION;
911	coroapi.transfer = api_transfer;	1484	coroapi.transfer = api_transfer;
912	}
913		1485
914	Coro::State	1486	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915	_newprocess(args)	1487	}
916	SV * args	1488
917	PROTOTYPE: $	1489	SV *
		1490	new (char *klass, ...)
918	CODE:	1491	CODE:
919	Coro__State coro;	1492	{
		1493	struct coro *coro;
		1494	HV *hv;
		1495	int i;
920		1496
921	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
922	croak ("Coro::State::_newprocess expects an arrayref");
923
924	Newz (0, coro, 1, struct coro);	1497	Newz (0, coro, 1, struct coro);
		1498	coro->args = newAV ();
		1499	coro->flags = CF_NEW;
925		1500
926	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1501	if (coro_first) coro_first->prev = coro;
927	/coro->mainstack = 0; //actual work is done inside transfer /	1502	coro->next = coro_first;
928	/coro->stack = 0;/	1503	coro_first = coro;
929		1504
930	/* same as JMPENV_BOOTSTRAP */	1505	coro->hv = hv = newHV ();
931	/* we might be able to recycle start_env, but safe is safe */	1506	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
932	/Zero(&coro->start_env, 1, JMPENV);/	1507	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
933	coro->start_env.je_ret = -1;
934	coro->start_env.je_mustcatch = TRUE;
935		1508
936	RETVAL = coro;	1509	av_extend (coro->args, items - 1);
		1510	for (i = 1; i < items; i++)
		1511	av_push (coro->args, newSVsv (ST (i)));
		1512	}
937	OUTPUT:	1513	OUTPUT:
938	RETVAL	1514	RETVAL
939		1515
		1516	# these not obviously related functions are all rolled into the same xs
		1517	# function to increase chances that they all will call transfer with the same
		1518	# stack offset
940	void	1519	void
941	transfer(prev, next, flags)	1520	_set_stacklevel (...)
942	SV *prev	1521	ALIAS:
943	SV *next	1522	Coro::State::transfer = 1
944	int flags	1523	Coro::schedule = 2
945	PROTOTYPE: @	1524	Coro::cede = 3
		1525	Coro::cede_notself = 4
946	CODE:	1526	CODE:
947	PUTBACK;	1527	{
948	SV_CORO (next, "Coro::transfer");	1528	struct transfer_args ta;
949	SV_CORO (prev, "Coro::transfer");	1529
950	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1530	switch (ix)
951	SPAGAIN;	1531	{
		1532	case 0:
		1533	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1534	ta.next = 0;
		1535	break;
		1536
		1537	case 1:
		1538	if (items != 2)
		1539	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1540
		1541	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1542	break;
		1543
		1544	case 2:
		1545	prepare_schedule (aTHX_ &ta);
		1546	break;
		1547
		1548	case 3:
		1549	prepare_cede (aTHX_ &ta);
		1550	break;
		1551
		1552	case 4:
		1553	if (!prepare_cede_notself (aTHX_ &ta))
		1554	XSRETURN_EMPTY;
		1555
		1556	break;
		1557	}
		1558
		1559	BARRIER;
		1560	TRANSFER (ta);
		1561
		1562	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1563	XSRETURN_YES;
		1564	}
		1565
		1566	bool
		1567	_destroy (SV *coro_sv)
		1568	CODE:
		1569	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1570	OUTPUT:
		1571	RETVAL
952		1572
953	void	1573	void
954	DESTROY(coro)
955	Coro::State coro
956	CODE:
957
958	if (coro->mainstack && coro->mainstack != main_mainstack)
959	{
960	struct coro temp;
961
962	PUTBACK;
963	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
964	LOAD (aTHX_ coro);
965	SPAGAIN;
966
967	destroy_stacks (aTHX);
968
969	LOAD ((&temp)); /* this will get rid of defsv etc.. */
970	SPAGAIN;
971
972	coro->mainstack = 0;
973	}
974
975	deallocate_stack (coro);
976	SvREFCNT_dec (coro->args);
977	Safefree (coro);
978
979	void
980	_exit(code)	1574	_exit (code)
981	int code	1575	int code
982	PROTOTYPE: $	1576	PROTOTYPE: $
983	CODE:	1577	CODE:
984	_exit (code);	1578	_exit (code);
985		1579
986	MODULE = Coro::State PACKAGE = Coro::Cont	1580	int
		1581	cctx_stacksize (int new_stacksize = 0)
		1582	CODE:
		1583	RETVAL = coro_stacksize;
		1584	if (new_stacksize)
		1585	coro_stacksize = new_stacksize;
		1586	OUTPUT:
		1587	RETVAL
987		1588
988	# this is slightly dirty (should expose a c-level api)	1589	int
		1590	cctx_count ()
		1591	CODE:
		1592	RETVAL = cctx_count;
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	int
		1597	cctx_idle ()
		1598	CODE:
		1599	RETVAL = cctx_idle;
		1600	OUTPUT:
		1601	RETVAL
989		1602
990	void	1603	void
991	yield(...)	1604	list ()
992	PROTOTYPE: @	1605	PPCODE:
		1606	{
		1607	struct coro *coro;
		1608	for (coro = coro_first; coro; coro = coro->next)
		1609	if (coro->hv)
		1610	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1611	}
		1612
		1613	void
		1614	call (Coro::State coro, SV *coderef)
		1615	ALIAS:
		1616	eval = 1
		1617	CODE:
		1618	{
		1619	if (coro->mainstack)
		1620	{
		1621	struct coro temp;
		1622
		1623	if (!(coro->flags & CF_RUNNING))
		1624	{
		1625	save_perl (aTHX_ &temp);
		1626	load_perl (aTHX_ coro);
		1627	}
		1628
		1629	{
		1630	dSP;
		1631	ENTER;
		1632	SAVETMPS;
		1633	PUSHMARK (SP);
		1634	PUTBACK;
		1635
		1636	if (ix)
		1637	eval_sv (coderef, 0);
		1638	else
		1639	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1640
		1641	SPAGAIN;
		1642	FREETMPS;
		1643	LEAVE;
		1644	PUTBACK;
		1645	}
		1646
		1647	if (!(coro->flags & CF_RUNNING))
		1648	{
		1649	save_perl (aTHX_ coro);
		1650	load_perl (aTHX_ &temp);
		1651	}
		1652	}
		1653	}
		1654
		1655	SV *
		1656	is_ready (Coro::State coro)
		1657	PROTOTYPE: $
		1658	ALIAS:
		1659	is_ready = CF_READY
		1660	is_running = CF_RUNNING
		1661	is_new = CF_NEW
		1662	is_destroyed = CF_DESTROYED
		1663	CODE:
		1664	RETVAL = boolSV (coro->flags & ix);
		1665	OUTPUT:
		1666	RETVAL
		1667
		1668	void
		1669	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1670
		1671	SV *
		1672	has_stack (Coro::State coro)
		1673	PROTOTYPE: $
		1674	CODE:
		1675	RETVAL = boolSV (!!coro->cctx);
		1676	OUTPUT:
		1677	RETVAL
		1678
		1679	int
		1680	is_traced (Coro::State coro)
		1681	PROTOTYPE: $
		1682	CODE:
		1683	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	IV
		1688	rss (Coro::State coro)
		1689	PROTOTYPE: $
		1690	ALIAS:
		1691	usecount = 1
993	CODE:	1692	CODE:
994	SV *yieldstack;	1693	switch (ix)
995	SV *sv;	1694	{
996	AV *defav = GvAV (PL_defgv);	1695	case 0: RETVAL = coro_rss (aTHX_ coro); break;
997	struct coro prev, next;	1696	case 1: RETVAL = coro->usecount; break;
998
999	yieldstack = *hv_fetch (
1000	(HV *)SvRV (GvSV (coro_current)),
1001	"yieldstack", sizeof ("yieldstack") - 1,
1002	0	1697	}
1003	);	1698	OUTPUT:
		1699	RETVAL
1004		1700
1005	/* set up @_ -- ugly */
1006	av_clear (defav);
1007	av_fill (defav, items - 1);
1008	while (items--)
1009	av_store (defav, items, SvREFCNT_inc (ST(items)));
1010
1011	sv = av_pop ((AV *)SvRV (yieldstack));
1012	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));
1013	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));
1014	SvREFCNT_dec (sv);
1015
1016	transfer (aTHX_ prev, next, 0);
1017		1701
1018	MODULE = Coro::State PACKAGE = Coro	1702	MODULE = Coro::State PACKAGE = Coro
1019		1703
1020	# this is slightly dirty (should expose a c-level api)
1021
1022	BOOT:	1704	BOOT:
1023	{	1705	{
1024	int i;	1706	int i;
		1707
		1708	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1709	get_sv ("Coro::POOL_RSS" , TRUE); /* silence stupid 5.10 warning */
		1710	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1711	get_sv ("Coro::POOL_SIZE" , TRUE); /* silence stupid 5.10 warning */
		1712	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1713	get_av ("Coro::async_pool", TRUE); /* silence stupid 5.10 warning */
		1714
		1715	coro_current = get_sv ("Coro::current", FALSE);
		1716	SvREADONLY_on (coro_current);
		1717
1025	HV *stash = gv_stashpv ("Coro", TRUE);	1718	coro_stash = gv_stashpv ("Coro", TRUE);
1026		1719
1027	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1720	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1721	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1722	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1723	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1724	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1725	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033
1034	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1035	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1036		1726
1037	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1727	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1038	coro_ready[i] = newAV ();	1728	coro_ready[i] = newAV ();
1039		1729
1040	{	1730	{
1041	SV *sv = perl_get_sv("Coro::API", 1);	1731	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1732	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1042		1733
1043	coroapi.schedule = api_schedule;	1734	coroapi.schedule = api_schedule;
1044	coroapi.cede = api_cede;	1735	coroapi.cede = api_cede;
		1736	coroapi.cede_notself = api_cede_notself;
1045	coroapi.ready = api_ready;	1737	coroapi.ready = api_ready;
		1738	coroapi.is_ready = api_is_ready;
1046	coroapi.nready = &coro_nready;	1739	coroapi.nready = &coro_nready;
1047	coroapi.current = coro_current;	1740	coroapi.current = coro_current;
1048		1741
1049	GCoroAPI = &coroapi;	1742	GCoroAPI = &coroapi;
1050	sv_setiv(sv, (IV)&coroapi);	1743	sv_setiv (sv, (IV)&coroapi);
1051	SvREADONLY_on(sv);	1744	SvREADONLY_on (sv);
1052	}	1745	}
1053	}	1746	}
1054		1747
1055	#if !PERL_MICRO
1056
1057	void	1748	void
1058	ready(self)	1749	_set_current (SV *current)
1059	SV * self
1060	PROTOTYPE: $	1750	PROTOTYPE: $
1061	CODE:	1751	CODE:
1062	api_ready (self);	1752	SvREFCNT_dec (SvRV (coro_current));
1063		1753	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1064	#endif
1065		1754
1066	int	1755	int
		1756	prio (Coro::State coro, int newprio = 0)
		1757	ALIAS:
		1758	nice = 1
		1759	CODE:
		1760	{
		1761	RETVAL = coro->prio;
		1762
		1763	if (items > 1)
		1764	{
		1765	if (ix)
		1766	newprio = coro->prio - newprio;
		1767
		1768	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1769	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1770
		1771	coro->prio = newprio;
		1772	}
		1773	}
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	SV *
		1778	ready (SV *self)
		1779	PROTOTYPE: $
		1780	CODE:
		1781	RETVAL = boolSV (api_ready (self));
		1782	OUTPUT:
		1783	RETVAL
		1784
		1785	int
1067	nready(...)	1786	nready (...)
1068	PROTOTYPE:	1787	PROTOTYPE:
1069	CODE:	1788	CODE:
1070	RETVAL = coro_nready;	1789	RETVAL = coro_nready;
1071	OUTPUT:	1790	OUTPUT:
1072	RETVAL	1791	RETVAL
1073		1792
1074	void	1793	void
1075	schedule(...)	1794	throw (Coro::State self, SV *throw = &PL_sv_undef)
1076	PROTOTYPE:	1795	PROTOTYPE: $;$
		1796	CODE:
		1797	SvREFCNT_dec (self->throw);
		1798	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1799
		1800	# for async_pool speedup
		1801	void
		1802	_pool_1 (SV *cb)
1077	CODE:	1803	CODE:
1078	api_schedule ();	1804	{
		1805	struct coro *coro = SvSTATE (coro_current);
		1806	HV hv = (HV )SvRV (coro_current);
		1807	AV *defav = GvAV (PL_defgv);
		1808	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1809	AV *invoke_av;
		1810	int i, len;
		1811
		1812	if (!invoke)
		1813	croak ("\3async_pool terminate\2\n");
		1814
		1815	SvREFCNT_dec (coro->saved_deffh);
		1816	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1817
		1818	hv_store (hv, "desc", sizeof ("desc") - 1,
		1819	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1820
		1821	invoke_av = (AV *)SvRV (invoke);
		1822	len = av_len (invoke_av);
		1823
		1824	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1825
		1826	if (len > 0)
		1827	{
		1828	av_fill (defav, len - 1);
		1829	for (i = 0; i < len; ++i)
		1830	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1831	}
		1832
		1833	SvREFCNT_dec (invoke);
		1834	}
1079		1835
1080	void	1836	void
1081	cede(...)	1837	_pool_2 (SV *cb)
1082	PROTOTYPE:
1083	CODE:	1838	CODE:
1084	api_cede ();	1839	{
		1840	struct coro *coro = SvSTATE (coro_current);
1085		1841
1086	# and these are hacks	1842	sv_setsv (cb, &PL_sv_undef);
		1843
		1844	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1845	coro->saved_deffh = 0;
		1846
		1847	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1848	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1849	croak ("\3async_pool terminate\2\n");
		1850
		1851	av_clear (GvAV (PL_defgv));
		1852	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1853	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1854
		1855	coro->prio = 0;
		1856
		1857	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1858	api_trace (coro_current, 0);
		1859
		1860	av_push (av_async_pool, newSVsv (coro_current));
		1861	}
		1862
		1863
		1864	MODULE = Coro::State PACKAGE = Coro::AIO
		1865
1087	SV *	1866	SV *
1088	_aio_get_state ()	1867	_get_state ()
1089	CODE:	1868	CODE:
1090	{	1869	{
1091	struct {	1870	struct io_state *data;
1092	int errorno;
1093	int laststype;
1094	int laststatval;
1095	Stat_t statcache;
1096	} data;
1097		1871
		1872	RETVAL = newSV (sizeof (struct io_state));
		1873	data = (struct io_state *)SvPVX (RETVAL);
		1874	SvCUR_set (RETVAL, sizeof (struct io_state));
		1875	SvPOK_only (RETVAL);
		1876
1098	data.errorno = errno;	1877	data->errorno = errno;
1099	data.laststype = PL_laststype;	1878	data->laststype = PL_laststype;
1100	data.laststatval = PL_laststatval;	1879	data->laststatval = PL_laststatval;
1101	data.statcache = PL_statcache;	1880	data->statcache = PL_statcache;
1102
1103	RETVAL = newSVpvn ((char *)&data, sizeof data);
1104	}	1881	}
1105	OUTPUT:	1882	OUTPUT:
1106	RETVAL	1883	RETVAL
1107		1884
1108	void	1885	void
1109	_aio_set_state (char *data_)	1886	_set_state (char *data_)
1110	PROTOTYPE: $	1887	PROTOTYPE: $
1111	CODE:	1888	CODE:
1112	{	1889	{
1113	struct {	1890	struct io_state data = (void )data_;
1114	int errorno;
1115	int laststype;
1116	int laststatval;
1117	Stat_t statcache;
1118	} data = (void )data_;
1119		1891
1120	errno = data->errorno;	1892	errno = data->errorno;
1121	PL_laststype = data->laststype;	1893	PL_laststype = data->laststype;
1122	PL_laststatval = data->laststatval;	1894	PL_laststatval = data->laststatval;
1123	PL_statcache = data->statcache;	1895	PL_statcache = data->statcache;
1124	}	1896	}
		1897

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Comparing Coro/Coro/State.xs (file contents): Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs. Revision 1.198 by root, Sun Oct 7 03:58:37 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.198 by root, Sun Oct 7 03:58:37 2007 UTC