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Comparing Coro/Coro/State.xs (file contents):
Revision 1.18 by root, Thu Jul 26 03:46:15 2001 UTC vs.
Revision 1.248 by root, Mon Sep 29 12:40:50 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
6 25
7#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
8# include <unistd.h> 27# include <unistd.h>
9# include <sys/mman.h> 28# include <sys/mman.h>
10# ifndef MAP_ANON
11# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
13# else 32# else
14# undef HAVE_MMAP 33# undef HAVE_MMAP
15# endif 34# endif
16# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
17#endif 43# endif
18
19#define MAY_FLUSH /* increases codesize */
20
21/* perl-related */
22#define TRANSFER_SAVE_DEFAV 0x00000001
23#define TRANSFER_SAVE_DEFSV 0x00000002
24#define TRANSFER_SAVE_ERRSV 0x00000004
25/* c-related */
26#define TRANSFER_SAVE_CCTXT 0x00000008
27#ifdef CORO_LAZY_STACK
28# define TRANSFER_LAZY_STACK 0x00000010
29#else 44#else
30# define TRANSFER_LAZY_STACK 0x00000000 45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
31#endif 68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
32 85
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 86/* 5.8.8 */
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 87#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0
89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
92#endif
35 93
36#define SUB_INIT "Coro::State::initialize" 94/* 5.11 */
37#define UCORO_STATE "_coro_state" 95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
38 98
39/* The next macro should delcare a variable stacklevel that contains and approximation 99/* 5.8.7 */
40 * to the current C stack pointer. It's property is that it changes with each call 100#ifndef SvRV_set
41 * and should be unique. */ 101# define SvRV_set(s,v) SvRV(s) = (v)
102#endif
103
104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
105# undef CORO_STACKGUARD
106#endif
107
108#ifndef CORO_STACKGUARD
109# define CORO_STACKGUARD 0
110#endif
111
112/* prefer perl internal functions over our own? */
113#ifndef CORO_PREFER_PERL_FUNCTIONS
114# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif
116
117/* The next macros try to return the current stack pointer, in an as
118 * portable way as possible. */
119#define dSTACKLEVEL volatile char stacklevel
42#define dSTACKLEVEL void *stacklevel = &stacklevel 120#define STACKLEVEL ((void *)&stacklevel)
43 121
44#define labs(l) ((l) >= 0 ? (l) : -(l)) 122#define IN_DESTRUCT (PL_main_cv == Nullcv)
45 123
46/* this is actually not only the c stack but also c registers etc... */ 124#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value))
128#else
129# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr)
132#endif
133
134#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1)
136
137#define NOINLINE attribute ((noinline))
138
139#include "CoroAPI.h"
140
141#ifdef USE_ITHREADS
142static perl_mutex coro_mutex;
143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
145#else
146# define LOCK (void)0
147# define UNLOCK (void)0
148#endif
149
150/* helper storage struct for Coro::AIO */
151struct io_state
152{
153 int errorno;
154 I32 laststype;
155 int laststatval;
156 Stat_t statcache;
157};
158
159static double (*nvtime)(); /* so why doesn't it take void? */
160
161static size_t coro_stacksize = CORO_STACKSIZE;
162static struct CoroAPI coroapi;
163static AV *main_mainstack; /* used to differentiate between $main and others */
164static JMPENV *main_top_env;
165static HV *coro_state_stash, *coro_stash;
166static volatile SV *coro_mortal; /* will be freed after next transfer */
167
168static GV *irsgv; /* $/ */
169static GV *stdoutgv; /* *STDOUT */
170static SV *rv_diehook;
171static SV *rv_warnhook;
172static HV *hv_sig; /* %SIG */
173
174/* async_pool helper stuff */
175static SV *sv_pool_rss;
176static SV *sv_pool_size;
177static AV *av_async_pool;
178
179/* Coro::AnyEvent */
180static SV *sv_activity;
181
182static struct coro_cctx *cctx_first;
183static int cctx_count, cctx_idle;
184
185enum {
186 CC_MAPPED = 0x01,
187 CC_NOREUSE = 0x02, /* throw this away after tracing */
188 CC_TRACE = 0x04,
189 CC_TRACE_SUB = 0x08, /* trace sub calls */
190 CC_TRACE_LINE = 0x10, /* trace each statement */
191 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
192};
193
194/* this is a structure representing a c-level coroutine */
195typedef struct coro_cctx {
196 struct coro_cctx *next;
197
198 /* the stack */
199 void *sptr;
200 size_t ssize;
201
202 /* cpu state */
203 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
204 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
205 JMPENV *top_env;
206 coro_context cctx;
207
208#if CORO_USE_VALGRIND
209 int valgrind_id;
210#endif
211 unsigned char flags;
212} coro_cctx;
213
214enum {
215 CF_RUNNING = 0x0001, /* coroutine is running */
216 CF_READY = 0x0002, /* coroutine is ready */
217 CF_NEW = 0x0004, /* has never been switched to */
218 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
219};
220
221/* the structure where most of the perl state is stored, overlaid on the cxstack */
47typedef struct { 222typedef struct {
48 int refcnt; /* pointer reference counter */ 223 SV *defsv;
49 int usecnt; /* shared by how many coroutines */ 224 AV *defav;
50 int gencnt; /* generation counter */ 225 SV *errsv;
226 SV *irsgv;
227#define VAR(name,type) type name;
228# include "state.h"
229#undef VAR
230} perl_slots;
51 231
52 coro_context cctx; 232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
53 233
54 void *sptr; 234/* this is a structure representing a perl-level coroutine */
55 long ssize; /* positive == mmap, otherwise malloc */
56} coro_stack;
57
58struct coro { 235struct coro {
59 /* the optional C context */ 236 /* the c coroutine allocated to this perl coroutine, if any */
60 coro_stack *stack; 237 coro_cctx *cctx;
61 void *cursp;
62 int gencnt;
63 238
64 /* optionally saved, might be zero */ 239 /* process data */
65 AV *defav;
66 SV *defsv;
67 SV *errsv;
68
69 /* saved global state not related to stacks */
70 U8 dowarn;
71
72 /* the stacks and related info (callchain etc..) */
73 PERL_SI *curstackinfo;
74 AV *curstack;
75 AV *mainstack; 240 AV *mainstack;
76 SV **stack_sp; 241 perl_slots *slot; /* basically the saved sp */
77 OP *op;
78 SV **curpad;
79 SV **stack_base;
80 SV **stack_max;
81 SV **tmps_stack;
82 I32 tmps_floor;
83 I32 tmps_ix;
84 I32 tmps_max;
85 I32 *markstack;
86 I32 *markstack_ptr;
87 I32 *markstack_max;
88 I32 *scopestack;
89 I32 scopestack_ix;
90 I32 scopestack_max;
91 ANY *savestack;
92 I32 savestack_ix;
93 I32 savestack_max;
94 OP **retstack;
95 I32 retstack_ix;
96 I32 retstack_max;
97 COP *curcop;
98 JMPENV start_env;
99 JMPENV *top_env;
100 242
101 /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
102 AV *args; 244 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */
247
248 /* statistics */
249 int usecount; /* number of transfers to this coro */
250
251 /* coro process data */
252 int prio;
253 SV *throw; /* exception to be thrown */
254
255 /* async_pool */
256 SV *saved_deffh;
257
258 /* linked list */
259 struct coro *next, *prev;
103}; 260};
104 261
105typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
106typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
107 264
108static AV *main_mainstack; /* used to differentiate between $main and others */ 265/** Coro ********************************************************************/
109static HV *coro_state_stash;
110static SV *ucoro_state_sv;
111static U32 ucoro_state_hash;
112static HV *padlist_cache;
113 266
114/* mostly copied from op.c:cv_clone2 */ 267#define PRIO_MAX 3
115STATIC AV * 268#define PRIO_HIGH 1
116clone_padlist (AV *protopadlist) 269#define PRIO_NORMAL 0
270#define PRIO_LOW -1
271#define PRIO_IDLE -3
272#define PRIO_MIN -4
273
274/* for Coro.pm */
275static SV *coro_current;
276static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
278static int coro_nready;
279static struct coro *coro_first;
280
281/** lowlevel stuff **********************************************************/
282
283static SV *
284coro_get_sv (pTHX_ const char *name, int create)
117{ 285{
118 AV *av; 286#if PERL_VERSION_ATLEAST (5,10,0)
119 I32 ix; 287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
120 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 288 get_sv (name, create);
121 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 289#endif
122 SV **pname = AvARRAY (protopad_name); 290 return get_sv (name, create);
123 SV **ppad = AvARRAY (protopad); 291}
124 I32 fname = AvFILLp (protopad_name); 292
125 I32 fpad = AvFILLp (protopad); 293static AV *
294coro_get_av (pTHX_ const char *name, int create)
295{
296#if PERL_VERSION_ATLEAST (5,10,0)
297 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
298 get_av (name, create);
299#endif
300 return get_av (name, create);
301}
302
303static HV *
304coro_get_hv (pTHX_ const char *name, int create)
305{
306#if PERL_VERSION_ATLEAST (5,10,0)
307 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
308 get_hv (name, create);
309#endif
310 return get_hv (name, create);
311}
312
313static AV *
314coro_clone_padlist (pTHX_ CV *cv)
315{
316 AV *padlist = CvPADLIST (cv);
126 AV *newpadlist, *newpad_name, *newpad; 317 AV *newpadlist, *newpad;
127 SV **npad;
128
129 newpad_name = newAV ();
130 for (ix = fname; ix >= 0; ix--)
131 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
132
133 newpad = newAV ();
134 av_fill (newpad, AvFILLp (protopad));
135 npad = AvARRAY (newpad);
136 318
137 newpadlist = newAV (); 319 newpadlist = newAV ();
138 AvREAL_off (newpadlist); 320 AvREAL_off (newpadlist);
139 av_store (newpadlist, 0, (SV *) newpad_name); 321#if PERL_VERSION_ATLEAST (5,10,0)
322 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
323#else
324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
325#endif
326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
327 --AvFILLp (padlist);
328
329 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
140 av_store (newpadlist, 1, (SV *) newpad); 330 av_store (newpadlist, 1, (SV *)newpad);
141 331
142 av = newAV (); /* will be @_ */ 332 return newpadlist;
143 av_extend (av, 0); 333}
144 av_store (newpad, 0, (SV *) av);
145 AvFLAGS (av) = AVf_REIFY;
146 334
147 for (ix = fpad; ix > 0; ix--) 335static void
336free_padlist (pTHX_ AV *padlist)
337{
338 /* may be during global destruction */
339 if (SvREFCNT (padlist))
148 { 340 {
149 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 341 I32 i = AvFILLp (padlist);
150 if (namesv && namesv != &PL_sv_undef) 342 while (i >= 0)
151 { 343 {
152 char *name = SvPVX (namesv); /* XXX */ 344 SV **svp = av_fetch (padlist, i--, FALSE);
153 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 345 if (svp)
154 { /* lexical from outside? */
155 npad[ix] = SvREFCNT_inc (ppad[ix]);
156 } 346 {
157 else
158 { /* our own lexical */
159 SV *sv; 347 SV *sv;
160 if (*name == '&') 348 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
161 sv = SvREFCNT_inc (ppad[ix]); 349 SvREFCNT_dec (sv);
162 else if (*name == '@') 350
163 sv = (SV *) newAV (); 351 SvREFCNT_dec (*svp);
164 else if (*name == '%')
165 sv = (SV *) newHV ();
166 else
167 sv = NEWSV (0, 0);
168 if (!SvPADBUSY (sv))
169 SvPADMY_on (sv);
170 npad[ix] = sv;
171 } 352 }
172 } 353 }
173 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
174 {
175 npad[ix] = SvREFCNT_inc (ppad[ix]);
176 }
177 else
178 {
179 SV *sv = NEWSV (0, 0);
180 SvPADTMP_on (sv);
181 npad[ix] = sv;
182 }
183 }
184 354
185#if 0 /* return -ENOTUNDERSTOOD */
186 /* Now that vars are all in place, clone nested closures. */
187
188 for (ix = fpad; ix > 0; ix--) {
189 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
190 if (namesv
191 && namesv != &PL_sv_undef
192 && !(SvFLAGS(namesv) & SVf_FAKE)
193 && *SvPVX(namesv) == '&'
194 && CvCLONE(ppad[ix]))
195 {
196 CV *kid = cv_clone((CV*)ppad[ix]);
197 SvREFCNT_dec(ppad[ix]);
198 CvCLONE_on(kid);
199 SvPADMY_on(kid);
200 npad[ix] = (SV*)kid;
201 }
202 }
203#endif
204
205 return newpadlist;
206}
207
208#ifdef MAY_FLUSH
209STATIC AV *
210free_padlist (AV *padlist)
211{
212 /* may be during global destruction */
213 if (SvREFCNT(padlist))
214 {
215 I32 i = AvFILLp(padlist);
216 while (i >= 0)
217 {
218 SV **svp = av_fetch(padlist, i--, FALSE);
219 SV *sv = svp ? *svp : Nullsv;
220 if (sv)
221 SvREFCNT_dec(sv);
222 }
223
224 SvREFCNT_dec((SV*)padlist); 355 SvREFCNT_dec ((SV*)padlist);
225 } 356 }
226} 357}
227#endif 358
359static int
360coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
361{
362 AV *padlist;
363 AV *av = (AV *)mg->mg_obj;
364
365 /* casting is fun. */
366 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
367 free_padlist (aTHX_ padlist);
368
369 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
370
371 return 0;
372}
373
374#define CORO_MAGIC_type_cv PERL_MAGIC_ext
375#define CORO_MAGIC_type_state PERL_MAGIC_ext
376
377static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0,
379 coro_cv_free
380};
381
382#define CORO_MAGIC(sv,type) \
383 SvMAGIC (sv) \
384 ? SvMAGIC (sv)->mg_type == type \
385 ? SvMAGIC (sv) \
386 : mg_find (sv, type) \
387 : 0
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391
392static struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
228 417
229/* the next two functions merely cache the padlists */ 418/* the next two functions merely cache the padlists */
230STATIC void 419static void
231get_padlist (CV *cv) 420get_padlist (pTHX_ CV *cv)
232{ 421{
233 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 422 MAGIC *mg = CORO_MAGIC_cv (cv);
423 AV *av;
234 424
235 if (he && AvFILLp ((AV *)*he) >= 0) 425 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
236 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 426 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
237 else 427 else
238 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
239}
240
241STATIC void
242put_padlist (CV *cv)
243{
244 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
245
246 if (SvTYPE (*he) != SVt_PVAV)
247 { 428 {
429#if CORO_PREFER_PERL_FUNCTIONS
430 /* this is probably cleaner? but also slower! */
431 /* in practise, it seems to be less stable */
432 CV *cp = Perl_cv_clone (cv);
433 CvPADLIST (cv) = CvPADLIST (cp);
434 CvPADLIST (cp) = 0;
248 SvREFCNT_dec (*he); 435 SvREFCNT_dec (cp);
249 *he = (SV *)newAV (); 436#else
437 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
438#endif
250 } 439 }
251
252 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
253} 440}
254
255#ifdef MAY_FLUSH
256STATIC void
257flush_padlist_cache ()
258{
259 HV *hv = padlist_cache;
260 padlist_cache = newHV ();
261
262 if (hv_iterinit (hv))
263 {
264 HE *he;
265 AV *padlist;
266
267 while (!!(he = hv_iternext (hv)))
268 {
269 AV *av = (AV *)HeVAL(he);
270
271 /* casting is fun. */
272 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273 free_padlist (padlist);
274 }
275 }
276
277 SvREFCNT_dec (hv);
278}
279#endif
280
281#define SB do {
282#define SE } while (0)
283
284#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
285#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
286
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
288 441
289static void 442static void
443put_padlist (pTHX_ CV *cv)
444{
445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
447
448 if (expect_false (!mg))
449 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
450
451 av = (AV *)mg->mg_obj;
452
453 if (expect_false (AvFILLp (av) >= AvMAX (av)))
454 av_extend (av, AvMAX (av) + 1);
455
456 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
457}
458
459/** load & save, init *******************************************************/
460
461static void
290load_state(pTHX_ Coro__State c) 462load_perl (pTHX_ Coro__State c)
291{ 463{
292 PL_dowarn = c->dowarn; 464 perl_slots *slot = c->slot;
465 c->slot = 0;
293 466
294 PL_curstackinfo = c->curstackinfo;
295 PL_curstack = c->curstack;
296 PL_mainstack = c->mainstack; 467 PL_mainstack = c->mainstack;
297 PL_stack_sp = c->stack_sp;
298 PL_op = c->op;
299 PL_curpad = c->curpad;
300 PL_stack_base = c->stack_base;
301 PL_stack_max = c->stack_max;
302 PL_tmps_stack = c->tmps_stack;
303 PL_tmps_floor = c->tmps_floor;
304 PL_tmps_ix = c->tmps_ix;
305 PL_tmps_max = c->tmps_max;
306 PL_markstack = c->markstack;
307 PL_markstack_ptr = c->markstack_ptr;
308 PL_markstack_max = c->markstack_max;
309 PL_scopestack = c->scopestack;
310 PL_scopestack_ix = c->scopestack_ix;
311 PL_scopestack_max = c->scopestack_max;
312 PL_savestack = c->savestack;
313 PL_savestack_ix = c->savestack_ix;
314 PL_savestack_max = c->savestack_max;
315 PL_retstack = c->retstack;
316 PL_retstack_ix = c->retstack_ix;
317 PL_retstack_max = c->retstack_max;
318 PL_curcop = c->curcop;
319 PL_start_env = c->start_env;
320 PL_top_env = c->top_env;
321 468
322 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 469 GvSV (PL_defgv) = slot->defsv;
323 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 470 GvAV (PL_defgv) = slot->defav;
324 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 471 GvSV (PL_errgv) = slot->errsv;
472 GvSV (irsgv) = slot->irsgv;
473
474 #define VAR(name,type) PL_ ## name = slot->name;
475 # include "state.h"
476 #undef VAR
325 477
326 { 478 {
327 dSP; 479 dSP;
480
328 CV *cv; 481 CV *cv;
329 482
330 /* now do the ugly restore mess */ 483 /* now do the ugly restore mess */
331 while ((cv = (CV *)POPs)) 484 while (expect_true (cv = (CV *)POPs))
332 { 485 {
333 AV *padlist = (AV *)POPs;
334
335 if (padlist)
336 {
337 put_padlist (cv); /* mark this padlist as available */ 486 put_padlist (aTHX_ cv); /* mark this padlist as available */
338 CvPADLIST(cv) = padlist; 487 CvDEPTH (cv) = PTR2IV (POPs);
339#ifdef USE_THREADS 488 CvPADLIST (cv) = (AV *)POPs;
340 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
341#endif
342 }
343
344 ++CvDEPTH(cv);
345 } 489 }
346 490
347 PUTBACK; 491 PUTBACK;
348 } 492 }
349} 493}
350 494
351static void 495static void
352save_state(pTHX_ Coro__State c, int flags) 496save_perl (pTHX_ Coro__State c)
353{ 497{
354 { 498 {
355 dSP; 499 dSP;
356 I32 cxix = cxstack_ix; 500 I32 cxix = cxstack_ix;
357 PERL_CONTEXT *ccstk = cxstack; 501 PERL_CONTEXT *ccstk = cxstack;
… …
360 /* 504 /*
361 * the worst thing you can imagine happens first - we have to save 505 * the worst thing you can imagine happens first - we have to save
362 * (and reinitialize) all cv's in the whole callchain :( 506 * (and reinitialize) all cv's in the whole callchain :(
363 */ 507 */
364 508
365 PUSHs (Nullsv); 509 XPUSHs (Nullsv);
366 /* this loop was inspired by pp_caller */ 510 /* this loop was inspired by pp_caller */
367 for (;;) 511 for (;;)
368 { 512 {
369 do 513 while (expect_true (cxix >= 0))
370 { 514 {
371 PERL_CONTEXT *cx = &ccstk[cxix--]; 515 PERL_CONTEXT *cx = &ccstk[cxix--];
372 516
373 if (CxTYPE(cx) == CXt_SUB) 517 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
374 { 518 {
375 CV *cv = cx->blk_sub.cv; 519 CV *cv = cx->blk_sub.cv;
520
376 if (CvDEPTH(cv)) 521 if (expect_true (CvDEPTH (cv)))
377 { 522 {
378#ifdef USE_THREADS
379 /*XPUSHs ((SV *)CvOWNER(cv));*/
380 /*CvOWNER(cv) = 0;*/
381 /*error must unlock this cv etc.. etc...*/
382#endif
383 EXTEND (SP, CvDEPTH(cv)*2); 523 EXTEND (SP, 3);
384
385 while (--CvDEPTH(cv))
386 {
387 /* this tells the restore code to increment CvDEPTH */
388 PUSHs (Nullsv);
389 PUSHs ((SV *)cv);
390 }
391
392 PUSHs ((SV *)CvPADLIST(cv)); 524 PUSHs ((SV *)CvPADLIST (cv));
525 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
393 PUSHs ((SV *)cv); 526 PUSHs ((SV *)cv);
394 527
395 get_padlist (cv); /* this is a monster */ 528 CvDEPTH (cv) = 0;
529 get_padlist (aTHX_ cv);
396 } 530 }
397 } 531 }
398 else if (CxTYPE(cx) == CXt_FORMAT)
399 {
400 /* I never used formats, so how should I know how these are implemented? */
401 /* my bold guess is as a simple, plain sub... */
402 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403 }
404 } 532 }
405 while (cxix >= 0);
406 533
407 if (top_si->si_type == PERLSI_MAIN) 534 if (expect_true (top_si->si_type == PERLSI_MAIN))
408 break; 535 break;
409 536
410 top_si = top_si->si_prev; 537 top_si = top_si->si_prev;
411 ccstk = top_si->si_cxstack; 538 ccstk = top_si->si_cxstack;
412 cxix = top_si->si_cxix; 539 cxix = top_si->si_cxix;
413 } 540 }
414 541
415 PUTBACK; 542 PUTBACK;
416 } 543 }
417 544
418 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 545 /* allocate some space on the context stack for our purposes */
419 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 546 /* we manually unroll here, as usually 2 slots is enough */
420 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 547 if (SLOT_COUNT >= 1) CXINC;
548 if (SLOT_COUNT >= 2) CXINC;
549 if (SLOT_COUNT >= 3) CXINC;
550 {
551 int i;
552 for (i = 3; i < SLOT_COUNT; ++i)
553 CXINC;
554 }
555 cxstack_ix -= SLOT_COUNT; /* undo allocation */
421 556
422 /* I have not the slightest idea of why av_reify is necessary */
423 /* but if it's missing the defav contents magically get replaced sometimes */
424 if (c->defav)
425 av_reify (c->defav);
426
427 c->dowarn = PL_dowarn;
428
429 c->curstackinfo = PL_curstackinfo;
430 c->curstack = PL_curstack;
431 c->mainstack = PL_mainstack; 557 c->mainstack = PL_mainstack;
432 c->stack_sp = PL_stack_sp; 558
433 c->op = PL_op; 559 {
434 c->curpad = PL_curpad; 560 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
435 c->stack_base = PL_stack_base; 561
436 c->stack_max = PL_stack_max; 562 slot->defav = GvAV (PL_defgv);
437 c->tmps_stack = PL_tmps_stack; 563 slot->defsv = DEFSV;
438 c->tmps_floor = PL_tmps_floor; 564 slot->errsv = ERRSV;
439 c->tmps_ix = PL_tmps_ix; 565 slot->irsgv = GvSV (irsgv);
440 c->tmps_max = PL_tmps_max; 566
441 c->markstack = PL_markstack; 567 #define VAR(name,type) slot->name = PL_ ## name;
442 c->markstack_ptr = PL_markstack_ptr; 568 # include "state.h"
443 c->markstack_max = PL_markstack_max; 569 #undef VAR
444 c->scopestack = PL_scopestack; 570 }
445 c->scopestack_ix = PL_scopestack_ix;
446 c->scopestack_max = PL_scopestack_max;
447 c->savestack = PL_savestack;
448 c->savestack_ix = PL_savestack_ix;
449 c->savestack_max = PL_savestack_max;
450 c->retstack = PL_retstack;
451 c->retstack_ix = PL_retstack_ix;
452 c->retstack_max = PL_retstack_max;
453 c->curcop = PL_curcop;
454 c->start_env = PL_start_env;
455 c->top_env = PL_top_env;
456} 571}
457 572
458/* 573/*
459 * allocate various perl stacks. This is an exact copy 574 * allocate various perl stacks. This is an exact copy
460 * of perl.c:init_stacks, except that it uses less memory 575 * of perl.c:init_stacks, except that it uses less memory
461 * on the assumption that coroutines do not usually need 576 * on the (sometimes correct) assumption that coroutines do
462 * a lot of stackspace. 577 * not usually need a lot of stackspace.
463 */ 578 */
464STATIC void 579#if CORO_PREFER_PERL_FUNCTIONS
580# define coro_init_stacks init_stacks
581#else
582static void
465coro_init_stacks (pTHX) 583coro_init_stacks (pTHX)
466{ 584{
467 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 585 PL_curstackinfo = new_stackinfo(32, 8);
468 PL_curstackinfo->si_type = PERLSI_MAIN; 586 PL_curstackinfo->si_type = PERLSI_MAIN;
469 PL_curstack = PL_curstackinfo->si_stack; 587 PL_curstack = PL_curstackinfo->si_stack;
470 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 588 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
471 589
472 PL_stack_base = AvARRAY(PL_curstack); 590 PL_stack_base = AvARRAY(PL_curstack);
473 PL_stack_sp = PL_stack_base; 591 PL_stack_sp = PL_stack_base;
474 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 592 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
475 593
476 New(50,PL_tmps_stack,96,SV*); 594 New(50,PL_tmps_stack,32,SV*);
477 PL_tmps_floor = -1; 595 PL_tmps_floor = -1;
478 PL_tmps_ix = -1; 596 PL_tmps_ix = -1;
479 PL_tmps_max = 96; 597 PL_tmps_max = 32;
480 598
481 New(54,PL_markstack,16,I32); 599 New(54,PL_markstack,16,I32);
482 PL_markstack_ptr = PL_markstack; 600 PL_markstack_ptr = PL_markstack;
483 PL_markstack_max = PL_markstack + 16; 601 PL_markstack_max = PL_markstack + 16;
484 602
603#ifdef SET_MARK_OFFSET
485 SET_MARK_OFFSET; 604 SET_MARK_OFFSET;
605#endif
486 606
487 New(54,PL_scopestack,16,I32); 607 New(54,PL_scopestack,8,I32);
488 PL_scopestack_ix = 0; 608 PL_scopestack_ix = 0;
489 PL_scopestack_max = 16; 609 PL_scopestack_max = 8;
490 610
491 New(54,PL_savestack,96,ANY); 611 New(54,PL_savestack,24,ANY);
492 PL_savestack_ix = 0; 612 PL_savestack_ix = 0;
493 PL_savestack_max = 96; 613 PL_savestack_max = 24;
494 614
615#if !PERL_VERSION_ATLEAST (5,10,0)
495 New(54,PL_retstack,8,OP*); 616 New(54,PL_retstack,4,OP*);
496 PL_retstack_ix = 0; 617 PL_retstack_ix = 0;
497 PL_retstack_max = 8; 618 PL_retstack_max = 4;
619#endif
498} 620}
621#endif
499 622
500/* 623/*
501 * destroy the stacks, the callchain etc... 624 * destroy the stacks, the callchain etc...
502 * still there is a memleak of 128 bytes...
503 */ 625 */
504STATIC void 626static void
505destroy_stacks(pTHX) 627coro_destroy_stacks (pTHX)
506{ 628{
507 /* is this ugly, I ask? */
508 while (PL_scopestack_ix)
509 LEAVE;
510
511 /* sure it is, but more important: is it correct?? :/ */
512 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
513 FREETMPS;
514
515 while (PL_curstackinfo->si_next) 629 while (PL_curstackinfo->si_next)
516 PL_curstackinfo = PL_curstackinfo->si_next; 630 PL_curstackinfo = PL_curstackinfo->si_next;
517 631
518 while (PL_curstackinfo) 632 while (PL_curstackinfo)
519 { 633 {
520 PERL_SI *p = PL_curstackinfo->si_prev; 634 PERL_SI *p = PL_curstackinfo->si_prev;
521 635
522 { 636 if (!IN_DESTRUCT)
523 dSP;
524 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
525 PUTBACK; /* possibly superfluous */
526 }
527
528 dounwind(-1);
529
530 SvREFCNT_dec(PL_curstackinfo->si_stack); 637 SvREFCNT_dec (PL_curstackinfo->si_stack);
638
531 Safefree(PL_curstackinfo->si_cxstack); 639 Safefree (PL_curstackinfo->si_cxstack);
532 Safefree(PL_curstackinfo); 640 Safefree (PL_curstackinfo);
533 PL_curstackinfo = p; 641 PL_curstackinfo = p;
534 } 642 }
535 643
536 Safefree(PL_tmps_stack); 644 Safefree (PL_tmps_stack);
537 Safefree(PL_markstack); 645 Safefree (PL_markstack);
538 Safefree(PL_scopestack); 646 Safefree (PL_scopestack);
539 Safefree(PL_savestack); 647 Safefree (PL_savestack);
648#if !PERL_VERSION_ATLEAST (5,10,0)
540 Safefree(PL_retstack); 649 Safefree (PL_retstack);
650#endif
651}
652
653static size_t
654coro_rss (pTHX_ struct coro *coro)
655{
656 size_t rss = sizeof (*coro);
657
658 if (coro->mainstack)
659 {
660 perl_slots tmp_slot;
661 perl_slots *slot;
662
663 if (coro->flags & CF_RUNNING)
664 {
665 slot = &tmp_slot;
666
667 #define VAR(name,type) slot->name = PL_ ## name;
668 # include "state.h"
669 #undef VAR
670 }
671 else
672 slot = coro->slot;
673
674 if (slot)
675 {
676 rss += sizeof (slot->curstackinfo);
677 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
678 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
679 rss += slot->tmps_max * sizeof (SV *);
680 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
681 rss += slot->scopestack_max * sizeof (I32);
682 rss += slot->savestack_max * sizeof (ANY);
683
684#if !PERL_VERSION_ATLEAST (5,10,0)
685 rss += slot->retstack_max * sizeof (OP *);
686#endif
687 }
688 }
689
690 return rss;
691}
692
693/** coroutine stack handling ************************************************/
694
695static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
696static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
697static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
698
699/* apparently < 5.8.8 */
700#ifndef MgPV_nolen_const
701#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
702 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
703 (const char*)(mg)->mg_ptr)
704#endif
705
706/*
707 * This overrides the default magic get method of %SIG elements.
708 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
709 * and instead of tryign to save and restore the hash elements, we just provide
710 * readback here.
711 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
712 * not expecting this to actually change the hook. This is a potential problem
713 * when a schedule happens then, but we ignore this.
714 */
715static int
716coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
717{
718 const char *s = MgPV_nolen_const (mg);
719
720 if (*s == '_')
721 {
722 SV **svp = 0;
723
724 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
725 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
726
727 if (svp)
728 {
729 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
730 return 0;
731 }
732 }
733
734 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
735}
736
737static int
738coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
739{
740 const char *s = MgPV_nolen_const (mg);
741
742 if (*s == '_')
743 {
744 SV **svp = 0;
745
746 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
747 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
748
749 if (svp)
750 {
751 SV *old = *svp;
752 *svp = 0;
753 SvREFCNT_dec (old);
754 return 0;
755 }
756 }
757
758 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
759}
760
761static int
762coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
763{
764 const char *s = MgPV_nolen_const (mg);
765
766 if (*s == '_')
767 {
768 SV **svp = 0;
769
770 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
771 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
772
773 if (svp)
774 {
775 SV *old = *svp;
776 *svp = newSVsv (sv);
777 SvREFCNT_dec (old);
778 return 0;
779 }
780 }
781
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
541} 783}
542 784
543static void 785static void
544allocate_stack (Coro__State ctx, int alloc) 786coro_setup (pTHX_ struct coro *coro)
545{
546 coro_stack *stack;
547
548 New (0, stack, 1, coro_stack);
549
550 stack->refcnt = 1;
551 stack->usecnt = 1;
552 stack->gencnt = ctx->gencnt = 0;
553 if (alloc)
554 {
555#ifdef HAVE_MMAP
556 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
558 if (stack->sptr == (void *)-1)
559#endif
560 {
561 /*FIXME*//*D*//* reasonable stack size! */
562 stack->ssize = -4096 * sizeof (long);
563 New (0, stack->sptr, 4096, long);
564 }
565 }
566 else
567 stack->sptr = 0;
568
569 ctx->stack = stack;
570}
571
572static void
573deallocate_stack (Coro__State ctx)
574{
575 coro_stack *stack = ctx->stack;
576
577 ctx->stack = 0;
578
579 if (stack)
580 {
581 if (!--stack->refcnt)
582 {
583#ifdef HAVE_MMAP
584 if (stack->ssize > 0 && stack->sptr)
585 munmap (stack->sptr, stack->ssize);
586 else
587#else
588 Safefree (stack->sptr);
589#endif
590 Safefree (stack);
591 }
592 else if (ctx->gencnt == stack->gencnt)
593 --stack->usecnt;
594 }
595}
596
597static void
598setup_coro (void *arg)
599{ 787{
600 /* 788 /*
601 * emulate part of the perl startup here. 789 * emulate part of the perl startup here.
602 */ 790 */
603 dSP;
604 Coro__State ctx = (Coro__State)arg;
605 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606
607 coro_init_stacks (aTHX); 791 coro_init_stacks (aTHX);
608 JMPENV_BOOTSTRAP; 792
793 PL_runops = RUNOPS_DEFAULT;
794 PL_curcop = &PL_compiling;
795 PL_in_eval = EVAL_NULL;
796 PL_comppad = 0;
797 PL_curpm = 0;
798 PL_curpad = 0;
799 PL_localizing = 0;
800 PL_dirty = 0;
801 PL_restartop = 0;
802#if PERL_VERSION_ATLEAST (5,10,0)
803 PL_parser = 0;
804#endif
805
806 /* recreate the die/warn hooks */
807 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
808 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
809
810 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
816
817 {
818 dSP;
819 LOGOP myop;
820
821 Zero (&myop, 1, LOGOP);
822 myop.op_next = Nullop;
823 myop.op_flags = OPf_WANT_VOID;
824
825 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
827 PUTBACK;
828 PL_op = (OP *)&myop;
829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
609 SPAGAIN; 830 SPAGAIN;
831 }
610 832
611 /*PL_curcop = 0;*/ 833 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub.
835 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
836 * so we ENTER here for symmetry
837 */
838 ENTER;
839}
840
841static void
842coro_destroy (pTHX_ struct coro *coro)
843{
844 if (!IN_DESTRUCT)
845 {
846 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0);
848 assert (PL_tmps_floor == -1);
849
850 /* free all temporaries */
851 FREETMPS;
852 assert (PL_tmps_ix == -1);
853
854 /* unwind all extra stacks */
855 POPSTACK_TO (PL_mainstack);
856
857 /* unwind main stack */
858 dounwind (-1);
859 }
860
861 SvREFCNT_dec (GvSV (PL_defgv));
612 SvREFCNT_dec (GvAV (PL_defgv)); 862 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; 863 SvREFCNT_dec (GvSV (PL_errgv));
864 SvREFCNT_dec (PL_defoutgv);
865 SvREFCNT_dec (PL_rs);
866 SvREFCNT_dec (GvSV (irsgv));
614 867
615 if (ctx->stack) 868 SvREFCNT_dec (PL_diehook);
616 { 869 SvREFCNT_dec (PL_warnhook);
617 ctx->cursp = 0; 870
871 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw);
618 873
619 PUSHMARK(SP); 874 coro_destroy_stacks (aTHX);
620 PUTBACK;
621 (void) call_sv (sub_init, G_VOID|G_NOARGS);
622 croak ("FATAL: CCTXT coroutine returned!");
623 }
624 else
625 {
626 UNOP myop;
627
628 PL_op = (OP *)&myop;
629
630 Zero(&myop, 1, UNOP);
631 myop.op_next = Nullop;
632 myop.op_flags = OPf_WANT_VOID;
633
634 PUSHMARK(SP);
635 XPUSHs (sub_init);
636 /*
637 * the next line is slightly wrong, as PL_op->op_next
638 * is actually being executed so we skip the first op.
639 * that doesn't matter, though, since it is only
640 * pp_nextstate and we never return...
641 * ah yes, and I don't care anyways ;)
642 */
643 PUTBACK;
644 PL_op = pp_entersub();
645 SPAGAIN;
646
647 ENTER; /* necessary e.g. for dounwind */
648 }
649} 875}
650 876
651static void 877static void
652continue_coro (void *arg) 878free_coro_mortal (pTHX)
653{ 879{
654 /* 880 if (expect_true (coro_mortal))
655 * this is a _very_ stripped down perl interpreter ;) 881 {
656 */ 882 SvREFCNT_dec (coro_mortal);
657 Coro__State ctx = (Coro__State)arg; 883 coro_mortal = 0;
658
659 ctx->cursp = 0;
660 PL_op = PL_op->op_next;
661 CALLRUNOPS(aTHX);
662 /*NORETURN*/
663 abort ();
664}
665
666STATIC void
667transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
668{
669 dSP;
670 dSTACKLEVEL;
671
672 if (prev != next)
673 { 884 }
674 if (next->mainstack) 885}
886
887static int
888runops_trace (pTHX)
889{
890 COP *oldcop = 0;
891 int oldcxix = -2;
892 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
893 coro_cctx *cctx = coro->cctx;
894
895 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
896 {
897 PERL_ASYNC_CHECK ();
898
899 if (cctx->flags & CC_TRACE_ALL)
675 { 900 {
676 SAVE (prev, flags); 901 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
677 LOAD (next);
678
679 /* mark this state as in-use */
680 next->mainstack = 0;
681 next->tmps_ix = -2;
682
683 /* stacklevel changed? if yes, grab the stack for us! */
684 if (flags & TRANSFER_SAVE_CCTXT)
685 { 902 {
686 if (!prev->stack) 903 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
687 allocate_stack (prev, 0); 904 SV **bot, **top;
688 else if (prev->cursp != stacklevel 905 AV *av = newAV (); /* return values */
689 && prev->stack->usecnt > 1) 906 SV **cb;
907 dSP;
908
909 GV *gv = CvGV (cx->blk_sub.cv);
910 SV *fullname = sv_2mortal (newSV (0));
911 if (isGV (gv))
912 gv_efullname3 (fullname, gv, 0);
913
914 bot = PL_stack_base + cx->blk_oldsp + 1;
915 top = cx->blk_gimme == G_ARRAY ? SP + 1
916 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot;
918
919 av_extend (av, top - bot);
920 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++));
922
923 PL_runops = RUNOPS_DEFAULT;
924 ENTER;
925 SAVETMPS;
926 EXTEND (SP, 3);
927 PUSHMARK (SP);
928 PUSHs (&PL_sv_no);
929 PUSHs (fullname);
930 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
931 PUTBACK;
932 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
933 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
934 SPAGAIN;
935 FREETMPS;
936 LEAVE;
937 PL_runops = runops_trace;
938 }
939
940 if (oldcop != PL_curcop)
941 {
942 oldcop = PL_curcop;
943
944 if (PL_curcop != &PL_compiling)
690 { 945 {
691 prev->gencnt = ++prev->stack->gencnt; 946 SV **cb;
692 prev->stack->usecnt = 1;
693 }
694 947
695 /* has our stack been invalidated? */ 948 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
696 if (next->stack && next->stack->gencnt != next->gencnt)
697 { 949 {
698 deallocate_stack (next); 950 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
699 allocate_stack (next, 1); 951
700 coro_create (&(next->stack->cctx), 952 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
701 continue_coro, (void *)next, 953 {
702 next->stack->sptr, labs (next->stack->ssize)); 954 runops_proc_t old_runops = PL_runops;
955 dSP;
956 GV *gv = CvGV (cx->blk_sub.cv);
957 SV *fullname = sv_2mortal (newSV (0));
958
959 if (isGV (gv))
960 gv_efullname3 (fullname, gv, 0);
961
962 PL_runops = RUNOPS_DEFAULT;
963 ENTER;
964 SAVETMPS;
965 EXTEND (SP, 3);
966 PUSHMARK (SP);
967 PUSHs (&PL_sv_yes);
968 PUSHs (fullname);
969 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
970 PUTBACK;
971 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
972 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
973 SPAGAIN;
974 FREETMPS;
975 LEAVE;
976 PL_runops = runops_trace;
977 }
978
979 oldcxix = cxstack_ix;
703 } 980 }
704 981
705 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 982 if (cctx->flags & CC_TRACE_LINE)
706 }
707
708 }
709 else if (next->tmps_ix == -2)
710 croak ("tried to transfer to running coroutine");
711 else
712 {
713 SAVE (prev, -1); /* first get rid of the old state */
714
715 if (flags & TRANSFER_SAVE_CCTXT)
716 {
717 if (!prev->stack)
718 allocate_stack (prev, 0);
719
720 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
721 { 983 {
722 setup_coro (next); 984 dSP;
723 985
724 prev->stack->refcnt++; 986 PL_runops = RUNOPS_DEFAULT;
725 prev->stack->usecnt++; 987 ENTER;
726 next->stack = prev->stack; 988 SAVETMPS;
727 next->gencnt = prev->gencnt; 989 EXTEND (SP, 3);
990 PL_runops = RUNOPS_DEFAULT;
991 PUSHMARK (SP);
992 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
993 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
994 PUTBACK;
995 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
996 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
997 SPAGAIN;
998 FREETMPS;
999 LEAVE;
1000 PL_runops = runops_trace;
728 } 1001 }
729 else
730 {
731 allocate_stack (next, 1);
732 coro_create (&(next->stack->cctx),
733 setup_coro, (void *)next,
734 next->stack->sptr, labs (next->stack->ssize));
735 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
736 } 1002 }
737 } 1003 }
738 else
739 setup_coro (next);
740 } 1004 }
741 } 1005 }
742 1006
743 next->cursp = stacklevel; 1007 TAINT_NOT;
1008 return 0;
744} 1009}
745 1010
1011/* inject a fake call to Coro::State::_cctx_init into the execution */
1012/* _cctx_init should be careful, as it could be called at almost any time */
1013/* during execution of a perl program */
1014static void NOINLINE
1015cctx_prepare (pTHX_ coro_cctx *cctx)
1016{
1017 dSP;
1018 LOGOP myop;
1019
1020 PL_top_env = &PL_start_env;
1021
1022 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace;
1024
1025 Zero (&myop, 1, LOGOP);
1026 myop.op_next = PL_op;
1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1028
1029 PUSHMARK (SP);
1030 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1033 PUTBACK;
1034 PL_op = (OP *)&myop;
1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1036 SPAGAIN;
1037}
1038
1039/*
1040 * this is a _very_ stripped down perl interpreter ;)
1041 */
1042static void
1043cctx_run (void *arg)
1044{
1045 dTHX;
1046
1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1048 UNLOCK;
1049
1050 /* we now skip the entersub that lead to transfer() */
1051 PL_op = PL_op->op_next;
1052
1053 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055
1056 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op;
1058 perl_run (PL_curinterp);
1059
1060 /*
1061 * If perl-run returns we assume exit() was being called or the coro
1062 * fell off the end, which seems to be the only valid (non-bug)
1063 * reason for perl_run to return. We try to exit by jumping to the
1064 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept
1066 */
1067 PL_top_env = main_top_env;
1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1069}
1070
1071static coro_cctx *
1072cctx_new ()
1073{
1074 coro_cctx *cctx;
1075 void *stack_start;
1076 size_t stack_size;
1077
1078 ++cctx_count;
1079
1080 Newz (0, cctx, 1, coro_cctx);
1081
1082#if HAVE_MMAP
1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1084 /* mmap supposedly does allocate-on-write for us */
1085 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1086
1087 if (cctx->sptr != (void *)-1)
1088 {
1089# if CORO_STACKGUARD
1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1091# endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED;
1095 }
1096 else
1097#endif
1098 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long);
1101
1102 if (!cctx->sptr)
1103 {
1104 perror ("FATAL: unable to allocate stack for coroutine");
1105 _exit (EXIT_FAILURE);
1106 }
1107
1108 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize;
1110 }
1111
1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1114
1115 return cctx;
1116}
1117
1118static void
1119cctx_destroy (coro_cctx *cctx)
1120{
1121 if (!cctx)
1122 return;
1123
1124 --cctx_count;
1125
1126#if CORO_USE_VALGRIND
1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1128#endif
1129
1130#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED)
1132 munmap (cctx->sptr, cctx->ssize);
1133 else
1134#endif
1135 Safefree (cctx->sptr);
1136
1137 Safefree (cctx);
1138}
1139
1140/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1142
1143static coro_cctx *
1144cctx_get (pTHX)
1145{
1146 while (expect_true (cctx_first))
1147 {
1148 coro_cctx *cctx = cctx_first;
1149 cctx_first = cctx->next;
1150 --cctx_idle;
1151
1152 if (expect_true (!CCTX_EXPIRED (cctx)))
1153 return cctx;
1154
1155 cctx_destroy (cctx);
1156 }
1157
1158 return cctx_new ();
1159}
1160
1161static void
1162cctx_put (coro_cctx *cctx)
1163{
1164 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1166 {
1167 coro_cctx *first = cctx_first;
1168 cctx_first = first->next;
1169 --cctx_idle;
1170
1171 cctx_destroy (first);
1172 }
1173
1174 ++cctx_idle;
1175 cctx->next = cctx_first;
1176 cctx_first = cctx;
1177}
1178
1179/** coroutine switching *****************************************************/
1180
1181static void
1182transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{
1184 if (expect_true (prev != next))
1185 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1187 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1188
1189 if (expect_false (next->flags & CF_RUNNING))
1190 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1191
1192 if (expect_false (next->flags & CF_DESTROYED))
1193 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1194
1195#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1197 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1198#endif
1199 }
1200}
1201
1202/* always use the TRANSFER macro */
1203static void NOINLINE
1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1205{
1206 dSTACKLEVEL;
1207 static volatile int has_throw;
1208
1209 /* sometimes transfer is only called to set idle_sp */
1210 if (expect_false (!next))
1211 {
1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1213 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1214 }
1215 else if (expect_true (prev != next))
1216 {
1217 coro_cctx *prev__cctx;
1218
1219 if (expect_false (prev->flags & CF_NEW))
1220 {
1221 /* create a new empty context */
1222 Newz (0, prev->cctx, 1, coro_cctx);
1223 prev->flags &= ~CF_NEW;
1224 prev->flags |= CF_RUNNING;
1225 }
1226
1227 prev->flags &= ~CF_RUNNING;
1228 next->flags |= CF_RUNNING;
1229
1230 LOCK;
1231
1232 /* first get rid of the old state */
1233 save_perl (aTHX_ prev);
1234
1235 if (expect_false (next->flags & CF_NEW))
1236 {
1237 /* need to start coroutine */
1238 next->flags &= ~CF_NEW;
1239 /* setup coroutine call */
1240 coro_setup (aTHX_ next);
1241 }
1242 else
1243 load_perl (aTHX_ next);
1244
1245 prev__cctx = prev->cctx;
1246
1247 /* possibly "free" the cctx */
1248 if (expect_true (
1249 prev__cctx->idle_sp == STACKLEVEL
1250 && !(prev__cctx->flags & CC_TRACE)
1251 && !force_cctx
1252 ))
1253 {
1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1255 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1256
1257 prev->cctx = 0;
1258
1259 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1260 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1261 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1262 if (!next->cctx)
1263 next->cctx = cctx_get (aTHX);
1264
1265 cctx_put (prev__cctx);
1266 }
1267
1268 ++next->usecount;
1269
1270 if (expect_true (!next->cctx))
1271 next->cctx = cctx_get (aTHX);
1272
1273 has_throw = !!next->throw;
1274
1275 if (expect_false (prev__cctx != next->cctx))
1276 {
1277 prev__cctx->top_env = PL_top_env;
1278 PL_top_env = next->cctx->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1280 }
1281
1282 free_coro_mortal (aTHX);
1283 UNLOCK;
1284
1285 if (expect_false (has_throw))
1286 {
1287 struct coro *coro = SvSTATE (coro_current);
1288
1289 if (coro->throw)
1290 {
1291 SV *exception = coro->throw;
1292 coro->throw = 0;
1293 sv_setsv (ERRSV, exception);
1294 croak (0);
1295 }
1296 }
1297 }
1298}
1299
1300struct transfer_args
1301{
1302 struct coro *prev, *next;
1303};
1304
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1306#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1307
1308/** high level stuff ********************************************************/
1309
1310static int
1311coro_state_destroy (pTHX_ struct coro *coro)
1312{
1313 if (coro->flags & CF_DESTROYED)
1314 return 0;
1315
1316 coro->flags |= CF_DESTROYED;
1317
1318 if (coro->flags & CF_READY)
1319 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready;
1324 UNLOCK;
1325 }
1326 else
1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1328
1329 if (coro->mainstack && coro->mainstack != main_mainstack)
1330 {
1331 struct coro temp;
1332
1333 if (coro->flags & CF_RUNNING)
1334 croak ("FATAL: tried to destroy currently running coroutine");
1335
1336 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro);
1338
1339 coro_destroy (aTHX_ coro);
1340
1341 load_perl (aTHX_ &temp);
1342
1343 coro->slot = 0;
1344 }
1345
1346 cctx_destroy (coro->cctx);
1347 SvREFCNT_dec (coro->args);
1348
1349 if (coro->next) coro->next->prev = coro->prev;
1350 if (coro->prev) coro->prev->next = coro->next;
1351 if (coro == coro_first) coro_first = coro->next;
1352
1353 return 1;
1354}
1355
1356static int
1357coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1358{
1359 struct coro *coro = (struct coro *)mg->mg_ptr;
1360 mg->mg_ptr = 0;
1361
1362 coro->hv = 0;
1363
1364 if (--coro->refcnt < 0)
1365 {
1366 coro_state_destroy (aTHX_ coro);
1367 Safefree (coro);
1368 }
1369
1370 return 0;
1371}
1372
1373static int
1374coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1375{
1376 struct coro *coro = (struct coro *)mg->mg_ptr;
1377
1378 ++coro->refcnt;
1379
1380 return 0;
1381}
1382
1383static MGVTBL coro_state_vtbl = {
1384 0, 0, 0, 0,
1385 coro_state_free,
1386 0,
1387#ifdef MGf_DUP
1388 coro_state_dup,
1389#else
1390# define MGf_DUP 0
1391#endif
1392};
1393
1394static void
1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1396{
1397 ta->prev = SvSTATE (prev_sv);
1398 ta->next = SvSTATE (next_sv);
1399 TRANSFER_CHECK (*ta);
1400}
1401
1402static void
1403api_transfer (SV *prev_sv, SV *next_sv)
1404{
1405 dTHX;
1406 struct transfer_args ta;
1407
1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1409 TRANSFER (ta, 1);
1410}
1411
1412/** Coro ********************************************************************/
1413
1414static void
1415coro_enq (pTHX_ SV *coro_sv)
1416{
1417 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1418}
1419
1420static SV *
1421coro_deq (pTHX)
1422{
1423 int prio;
1424
1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1426 if (AvFILLp (coro_ready [prio]) >= 0)
1427 return av_shift (coro_ready [prio]);
1428
1429 return 0;
1430}
1431
1432static int
1433api_ready (SV *coro_sv)
1434{
1435 dTHX;
1436 struct coro *coro;
1437 SV *sv_hook;
1438 void (*xs_hook)(void);
1439
1440 if (SvROK (coro_sv))
1441 coro_sv = SvRV (coro_sv);
1442
1443 coro = SvSTATE (coro_sv);
1444
1445 if (coro->flags & CF_READY)
1446 return 0;
1447
1448 coro->flags |= CF_READY;
1449
1450 LOCK;
1451
1452 sv_hook = coro_nready ? 0 : coro_readyhook;
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1454
1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1456 ++coro_nready;
1457
1458 UNLOCK;
1459
1460 if (sv_hook)
1461 {
1462 dSP;
1463
1464 ENTER;
1465 SAVETMPS;
1466
1467 PUSHMARK (SP);
1468 PUTBACK;
1469 call_sv (sv_hook, G_DISCARD);
1470 SPAGAIN;
1471
1472 FREETMPS;
1473 LEAVE;
1474 }
1475
1476 if (xs_hook)
1477 xs_hook ();
1478
1479 return 1;
1480}
1481
1482static int
1483api_is_ready (SV *coro_sv)
1484{
1485 dTHX;
1486 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1487}
1488
1489static void
1490prepare_schedule (pTHX_ struct transfer_args *ta)
1491{
1492 SV *prev_sv, *next_sv;
1493
1494 for (;;)
1495 {
1496 LOCK;
1497 next_sv = coro_deq (aTHX);
1498
1499 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv))
1501 {
1502 dSP;
1503 UNLOCK;
1504
1505 ENTER;
1506 SAVETMPS;
1507
1508 PUSHMARK (SP);
1509 PUTBACK;
1510 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1511 SPAGAIN;
1512
1513 FREETMPS;
1514 LEAVE;
1515 continue;
1516 }
1517
1518 ta->next = SvSTATE (next_sv);
1519
1520 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */
1526 continue;
1527 }
1528
1529 --coro_nready;
1530 UNLOCK;
1531 break;
1532 }
1533
1534 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current);
1536 ta->prev = SvSTATE (prev_sv);
1537 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY);
1539 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv);
1541
1542 LOCK;
1543 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv;
1545 UNLOCK;
1546}
1547
1548static void
1549prepare_cede (pTHX_ struct transfer_args *ta)
1550{
1551 api_ready (coro_current);
1552 prepare_schedule (aTHX_ ta);
1553}
1554
1555static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta)
1557{
1558 if (coro_nready)
1559 {
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta);
1562 api_ready (prev);
1563 return 1;
1564 }
1565 else
1566 return 0;
1567}
1568
1569static void
1570api_schedule (void)
1571{
1572 dTHX;
1573 struct transfer_args ta;
1574
1575 prepare_schedule (aTHX_ &ta);
1576 TRANSFER (ta, 1);
1577}
1578
1579static int
1580api_cede (void)
1581{
1582 dTHX;
1583 struct transfer_args ta;
1584
1585 prepare_cede (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
1589 TRANSFER (ta, 1);
1590 return 1;
1591 }
1592 else
1593 return 0;
1594}
1595
1596static int
1597api_cede_notself (void)
1598{
1599 dTHX;
1600 struct transfer_args ta;
1601
1602 if (prepare_cede_notself (aTHX_ &ta))
1603 {
1604 TRANSFER (ta, 1);
1605 return 1;
1606 }
1607 else
1608 return 0;
1609}
1610
1611static void
1612api_trace (SV *coro_sv, int flags)
1613{
1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv);
1616
1617 if (flags & CC_TRACE)
1618 {
1619 if (!coro->cctx)
1620 coro->cctx = cctx_new ();
1621 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack");
1623
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 {
1628 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1629
1630 if (coro->flags & CF_RUNNING)
1631 PL_runops = RUNOPS_DEFAULT;
1632 else
1633 coro->slot->runops = RUNOPS_DEFAULT;
1634 }
1635}
1636
1637static int
1638coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1639{
1640 AV *padlist;
1641 AV *av = (AV *)mg->mg_obj;
1642
1643 abort ();
1644
1645 return 0;
1646}
1647
1648static MGVTBL coro_gensub_vtbl = {
1649 0, 0, 0, 0,
1650 coro_gensub_free
1651};
1652
1653/*****************************************************************************/
1654/* PerlIO::cede */
1655
1656typedef struct
1657{
1658 PerlIOBuf base;
1659 NV next, every;
1660} PerlIOCede;
1661
1662static IV
1663PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1664{
1665 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1666
1667 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1668 self->next = nvtime () + self->every;
1669
1670 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1671}
1672
1673static SV *
1674PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1675{
1676 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1677
1678 return newSVnv (self->every);
1679}
1680
1681static IV
1682PerlIOCede_flush (pTHX_ PerlIO *f)
1683{
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime ();
1686
1687 if (now >= self->next)
1688 {
1689 api_cede ();
1690 self->next = now + self->every;
1691 }
1692
1693 return PerlIOBuf_flush (aTHX_ f);
1694}
1695
1696static PerlIO_funcs PerlIO_cede =
1697{
1698 sizeof(PerlIO_funcs),
1699 "cede",
1700 sizeof(PerlIOCede),
1701 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1702 PerlIOCede_pushed,
1703 PerlIOBuf_popped,
1704 PerlIOBuf_open,
1705 PerlIOBase_binmode,
1706 PerlIOCede_getarg,
1707 PerlIOBase_fileno,
1708 PerlIOBuf_dup,
1709 PerlIOBuf_read,
1710 PerlIOBuf_unread,
1711 PerlIOBuf_write,
1712 PerlIOBuf_seek,
1713 PerlIOBuf_tell,
1714 PerlIOBuf_close,
1715 PerlIOCede_flush,
1716 PerlIOBuf_fill,
1717 PerlIOBase_eof,
1718 PerlIOBase_error,
1719 PerlIOBase_clearerr,
1720 PerlIOBase_setlinebuf,
1721 PerlIOBuf_get_base,
1722 PerlIOBuf_bufsiz,
1723 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt,
1726};
1727
1728
746MODULE = Coro::State PACKAGE = Coro::State 1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
747 1730
748PROTOTYPES: ENABLE 1731PROTOTYPES: DISABLE
749 1732
750BOOT: 1733BOOT:
751{ /* {} necessary for stoopid perl-5.6.x */ 1734{
752 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1735#ifdef USE_ITHREADS
753 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1736 MUTEX_INIT (&coro_mutex);
1737#endif
1738 BOOT_PAGESIZE;
1739
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1742
1743 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1744 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1745 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1746
1747 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1748 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1749 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1750
754 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1751 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
755 1752
756 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1753 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
757 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1754 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
758 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1755 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
759 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1756 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
760
761 if (!padlist_cache)
762 padlist_cache = newHV ();
763 1757
764 main_mainstack = PL_mainstack; 1758 main_mainstack = PL_mainstack;
765} 1759 main_top_env = PL_top_env;
766 1760
767Coro::State 1761 while (main_top_env->je_prev)
768_newprocess(args) 1762 main_top_env = main_top_env->je_prev;
769 SV * args 1763
770 PROTOTYPE: $ 1764 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION;
1766 coroapi.transfer = api_transfer;
1767
1768 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770
1771 if (!svp) croak ("Time::HiRes is required");
1772 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1773
1774 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1775 }
1776
1777 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1778}
1779
1780SV *
1781new (char *klass, ...)
771 CODE: 1782 CODE:
772 Coro__State coro; 1783{
1784 struct coro *coro;
1785 MAGIC *mg;
1786 HV *hv;
1787 int i;
773 1788
774 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
775 croak ("Coro::State::_newprocess expects an arrayref");
776
777 New (0, coro, 1, struct coro); 1789 Newz (0, coro, 1, struct coro);
1790 coro->args = newAV ();
1791 coro->flags = CF_NEW;
778 1792
779 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1793 if (coro_first) coro_first->prev = coro;
780 coro->mainstack = 0; /* actual work is done inside transfer */ 1794 coro->next = coro_first;
781 coro->stack = 0; 1795 coro_first = coro;
782 1796
783 RETVAL = coro; 1797 coro->hv = hv = newHV ();
1798 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1799 mg->mg_flags |= MGf_DUP;
1800 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1801
1802 av_extend (coro->args, items - 1);
1803 for (i = 1; i < items; i++)
1804 av_push (coro->args, newSVsv (ST (i)));
1805}
784 OUTPUT: 1806 OUTPUT:
785 RETVAL 1807 RETVAL
786 1808
1809# these not obviously related functions are all rolled into the same xs
1810# function to increase chances that they all will call transfer with the same
1811# stack offset
787void 1812void
788transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1813_set_stacklevel (...)
789 Coro::State_or_hashref prev 1814 ALIAS:
790 Coro::State_or_hashref next 1815 Coro::State::transfer = 1
791 int flags 1816 Coro::schedule = 2
792 PROTOTYPE: @ 1817 Coro::cede = 3
1818 Coro::cede_notself = 4
793 CODE: 1819 CODE:
794 transfer (aTHX_ prev, next, flags); 1820{
1821 struct transfer_args ta;
1822
1823 PUTBACK;
1824 switch (ix)
1825 {
1826 case 0:
1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1828 ta.next = 0;
1829 break;
1830
1831 case 1:
1832 if (items != 2)
1833 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1834
1835 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1836 break;
1837
1838 case 2:
1839 prepare_schedule (aTHX_ &ta);
1840 break;
1841
1842 case 3:
1843 prepare_cede (aTHX_ &ta);
1844 break;
1845
1846 case 4:
1847 if (!prepare_cede_notself (aTHX_ &ta))
1848 XSRETURN_EMPTY;
1849
1850 break;
1851 }
1852 SPAGAIN;
1853
1854 BARRIER;
1855 PUTBACK;
1856 TRANSFER (ta, 0);
1857 SPAGAIN; /* might be the sp of a different coroutine now */
1858 /* be extra careful not to ever do anything after TRANSFER */
1859}
1860
1861bool
1862_destroy (SV *coro_sv)
1863 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1865 OUTPUT:
1866 RETVAL
795 1867
796void 1868void
797DESTROY(coro) 1869_exit (int code)
798 Coro::State coro 1870 PROTOTYPE: $
799 CODE: 1871 CODE:
1872 _exit (code);
800 1873
801 if (coro->mainstack && coro->mainstack != main_mainstack) 1874int
1875cctx_stacksize (int new_stacksize = 0)
1876 CODE:
1877 RETVAL = coro_stacksize;
1878 if (new_stacksize)
1879 coro_stacksize = new_stacksize;
1880 OUTPUT:
1881 RETVAL
1882
1883int
1884cctx_count ()
1885 CODE:
1886 RETVAL = cctx_count;
1887 OUTPUT:
1888 RETVAL
1889
1890int
1891cctx_idle ()
1892 CODE:
1893 RETVAL = cctx_idle;
1894 OUTPUT:
1895 RETVAL
1896
1897void
1898list ()
1899 PPCODE:
1900{
1901 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv)
1904 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1905}
1906
1907void
1908call (Coro::State coro, SV *coderef)
1909 ALIAS:
1910 eval = 1
1911 CODE:
1912{
1913 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
802 { 1914 {
803 struct coro temp; 1915 struct coro temp;
804 1916
805 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1917 if (!(coro->flags & CF_RUNNING))
806 LOAD(aTHX_ coro); 1918 {
1919 PUTBACK;
1920 save_perl (aTHX_ &temp);
1921 load_perl (aTHX_ coro);
1922 }
807 1923
808 destroy_stacks (aTHX); 1924 {
1925 dSP;
1926 ENTER;
1927 SAVETMPS;
1928 PUTBACK;
1929 PUSHSTACK;
1930 PUSHMARK (SP);
809 1931
810 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1932 if (ix)
1933 eval_sv (coderef, 0);
1934 else
1935 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
811 1936
812 coro->mainstack = 0; 1937 POPSTACK;
1938 SPAGAIN;
1939 FREETMPS;
1940 LEAVE;
1941 PUTBACK;
1942 }
1943
1944 if (!(coro->flags & CF_RUNNING))
1945 {
1946 save_perl (aTHX_ coro);
1947 load_perl (aTHX_ &temp);
1948 SPAGAIN;
1949 }
813 } 1950 }
1951}
814 1952
815 deallocate_stack (coro); 1953SV *
816 1954is_ready (Coro::State coro)
817 Safefree (coro); 1955 PROTOTYPE: $
1956 ALIAS:
1957 is_ready = CF_READY
1958 is_running = CF_RUNNING
1959 is_new = CF_NEW
1960 is_destroyed = CF_DESTROYED
1961 CODE:
1962 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT:
1964 RETVAL
818 1965
819void 1966void
820flush() 1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1968
1969SV *
1970has_cctx (Coro::State coro)
1971 PROTOTYPE: $
821 CODE: 1972 CODE:
822#ifdef MAY_FLUSH 1973 RETVAL = boolSV (!!coro->cctx);
823 flush_padlist_cache (); 1974 OUTPUT:
824#endif 1975 RETVAL
825 1976
826MODULE = Coro::State PACKAGE = Coro::Cont 1977int
1978is_traced (Coro::State coro)
1979 PROTOTYPE: $
1980 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT:
1983 RETVAL
827 1984
828# this is slightly dirty 1985IV
1986rss (Coro::State coro)
1987 PROTOTYPE: $
1988 ALIAS:
1989 usecount = 1
1990 CODE:
1991 switch (ix)
1992 {
1993 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1994 case 1: RETVAL = coro->usecount; break;
1995 }
1996 OUTPUT:
1997 RETVAL
829 1998
830void 1999void
831yield(...) 2000force_cctx ()
2001 CODE:
2002 struct coro *coro = SvSTATE (coro_current);
2003 coro->cctx->idle_sp = 0;
2004
2005void
2006throw (Coro::State self, SV *throw = &PL_sv_undef)
2007 PROTOTYPE: $;$
2008 CODE:
2009 SvREFCNT_dec (self->throw);
2010 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2011
2012void
2013swap_defsv (Coro::State self)
2014 PROTOTYPE: $
2015 ALIAS:
2016 swap_defav = 1
2017 CODE:
2018 if (!self->slot)
2019 croak ("cannot swap state with coroutine that has no saved state");
2020 else
2021 {
2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2024
2025 SV *tmp = *src; *src = *dst; *dst = tmp;
2026 }
2027
2028MODULE = Coro::State PACKAGE = Coro
2029
2030BOOT:
2031{
2032 int i;
2033
2034 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2035 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2036 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2037
2038 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2039 SvREADONLY_on (coro_current);
2040
2041 coro_stash = gv_stashpv ("Coro", TRUE);
2042
2043 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2044 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2045 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2046 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2047 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2048 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2049
2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2051 coro_ready[i] = newAV ();
2052
2053 {
2054 SV *sv = perl_get_sv ("Coro::API", TRUE);
2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2056
2057 coroapi.schedule = api_schedule;
2058 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself;
2060 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready;
2062 coroapi.nready = &coro_nready;
2063 coroapi.current = coro_current;
2064
2065 GCoroAPI = &coroapi;
2066 sv_setiv (sv, (IV)&coroapi);
2067 SvREADONLY_on (sv);
2068 }
2069}
2070
2071void
2072_set_current (SV *current)
2073 PROTOTYPE: $
2074 CODE:
2075 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
2077
2078void
2079_set_readyhook (SV *hook)
2080 PROTOTYPE: $
2081 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook);
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2085 UNLOCK;
2086
2087int
2088prio (Coro::State coro, int newprio = 0)
2089 ALIAS:
2090 nice = 1
2091 CODE:
2092{
2093 RETVAL = coro->prio;
2094
2095 if (items > 1)
2096 {
2097 if (ix)
2098 newprio = coro->prio - newprio;
2099
2100 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2101 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2102
2103 coro->prio = newprio;
2104 }
2105}
2106 OUTPUT:
2107 RETVAL
2108
2109SV *
2110ready (SV *self)
2111 PROTOTYPE: $
2112 CODE:
2113 RETVAL = boolSV (api_ready (self));
2114 OUTPUT:
2115 RETVAL
2116
2117int
2118nready (...)
2119 PROTOTYPE:
2120 CODE:
2121 RETVAL = coro_nready;
2122 OUTPUT:
2123 RETVAL
2124
2125# for async_pool speedup
2126void
2127_pool_1 (SV *cb)
2128 CODE:
2129{
2130 struct coro *coro = SvSTATE (coro_current);
2131 HV *hv = (HV *)SvRV (coro_current);
2132 AV *defav = GvAV (PL_defgv);
2133 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2134 AV *invoke_av;
2135 int i, len;
2136
2137 if (!invoke)
2138 {
2139 SV *old = PL_diehook;
2140 PL_diehook = 0;
2141 SvREFCNT_dec (old);
2142 croak ("\3async_pool terminate\2\n");
2143 }
2144
2145 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2147
2148 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150
2151 invoke_av = (AV *)SvRV (invoke);
2152 len = av_len (invoke_av);
2153
2154 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2155
2156 if (len > 0)
2157 {
2158 av_fill (defav, len - 1);
2159 for (i = 0; i < len; ++i)
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2161 }
2162
2163 SvREFCNT_dec (invoke);
2164}
2165
2166void
2167_pool_2 (SV *cb)
2168 CODE:
2169{
2170 struct coro *coro = SvSTATE (coro_current);
2171
2172 sv_setsv (cb, &PL_sv_undef);
2173
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0;
2176
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 {
2180 SV *old = PL_diehook;
2181 PL_diehook = 0;
2182 SvREFCNT_dec (old);
2183 croak ("\3async_pool terminate\2\n");
2184 }
2185
2186 av_clear (GvAV (PL_defgv));
2187 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189
2190 coro->prio = 0;
2191
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0);
2194
2195 av_push (av_async_pool, newSVsv (coro_current));
2196}
2197
2198#if 0
2199
2200void
2201_generator_call (...)
832 PROTOTYPE: @ 2202 PROTOTYPE: @
2203 PPCODE:
2204 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2205 xxxx
2206 abort ();
2207
2208SV *
2209gensub (SV *sub, ...)
2210 PROTOTYPE: &;@
833 CODE: 2211 CODE:
834 static SV *returnstk; 2212{
2213 struct coro *coro;
2214 MAGIC *mg;
835 SV *sv; 2215 CV *xcv;
836 AV *defav = GvAV (PL_defgv); 2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
837 struct coro *prev, *next; 2217 int i;
838 2218
839 if (!returnstk) 2219 CvGV (ncv) = CvGV (cv);
840 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2220 CvFILE (ncv) = CvFILE (cv);
841 2221
842 /* set up @_ -- ugly */ 2222 Newz (0, coro, 1, struct coro);
843 av_clear (defav); 2223 coro->args = newAV ();
844 av_fill (defav, items - 1); 2224 coro->flags = CF_NEW;
845 while (items--)
846 av_store (defav, items, SvREFCNT_inc (ST(items)));
847 2225
848 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2226 av_extend (coro->args, items - 1);
849 sv = av_pop ((AV *)SvRV (returnstk)); 2227 for (i = 1; i < items; i++)
850 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 2228 av_push (coro->args, newSVsv (ST (i)));
851 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
852 SvREFCNT_dec (sv);
853 2229
854 transfer(aTHX_ prev, next, 0); 2230 CvISXSUB_on (ncv);
2231 CvXSUBANY (ncv).any_ptr = (void *)coro;
855 2232
2233 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2234
2235 CvXSUB (ncv) = CvXSUB (xcv);
2236 CvANON_on (ncv);
2237
2238 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2239 RETVAL = newRV_noinc ((SV *)ncv);
2240}
2241 OUTPUT:
2242 RETVAL
2243
2244#endif
2245
2246
2247MODULE = Coro::State PACKAGE = Coro::AIO
2248
2249SV *
2250_get_state ()
2251 CODE:
2252{
2253 struct io_state *data;
2254
2255 RETVAL = newSV (sizeof (struct io_state));
2256 data = (struct io_state *)SvPVX (RETVAL);
2257 SvCUR_set (RETVAL, sizeof (struct io_state));
2258 SvPOK_only (RETVAL);
2259
2260 data->errorno = errno;
2261 data->laststype = PL_laststype;
2262 data->laststatval = PL_laststatval;
2263 data->statcache = PL_statcache;
2264}
2265 OUTPUT:
2266 RETVAL
2267
2268void
2269_set_state (char *data_)
2270 PROTOTYPE: $
2271 CODE:
2272{
2273 struct io_state *data = (void *)data_;
2274
2275 errno = data->errorno;
2276 PL_laststype = data->laststype;
2277 PL_laststatval = data->laststatval;
2278 PL_statcache = data->statcache;
2279}
2280
2281
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent
2283
2284BOOT:
2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2286
2287SV *
2288_schedule (...)
2289 PROTOTYPE: @
2290 CODE:
2291{
2292 static int incede;
2293
2294 api_cede_notself ();
2295
2296 ++incede;
2297 while (coro_nready >= incede && api_cede ())
2298 ;
2299
2300 sv_setsv (sv_activity, &PL_sv_undef);
2301 if (coro_nready >= incede)
2302 {
2303 PUSHMARK (SP);
2304 PUTBACK;
2305 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2306 SPAGAIN;
2307 }
2308
2309 --incede;
2310}
2311
2312
2313MODULE = Coro::State PACKAGE = PerlIO::cede
2314
2315BOOT:
2316 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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