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Comparing Coro/Coro/State.xs (file contents):
Revision 1.52 by pcg, Sun Nov 30 22:49:25 2003 UTC vs.
Revision 1.259 by root, Mon Nov 10 00:02:29 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 "patchlevel.h" 11#include "patchlevel.h"
6 12
7#if PATCHLEVEL < 6 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
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# 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
43# endif
44#else
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 */
57static int cctx_max_idle = 4;
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)
8# ifndef PL_ppaddr 66# ifndef PL_ppaddr
9# define PL_ppaddr ppaddr 67# define PL_ppaddr ppaddr
10# endif 68# endif
11# ifndef call_sv 69# ifndef call_sv
12# define call_sv perl_call_sv 70# define call_sv perl_call_sv
… …
23# ifndef IS_PADCONST 81# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
25# endif 83# endif
26#endif 84#endif
27 85
28#include "libcoro/coro.c" 86/* 5.11 */
29 87#ifndef CxHASARGS
30#include <signal.h> 88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
31
32#ifdef HAVE_MMAP
33# include <unistd.h>
34# include <sys/mman.h>
35# ifndef MAP_ANONYMOUS
36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
38# else
39# undef HAVE_MMAP
40# endif 89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#define dSTACKLEVEL volatile char stacklevel
125#define STACKLEVEL ((void *)&stacklevel)
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
133#else
134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
41# endif 153# endif
42#endif
43 154
44#define SUB_INIT "Coro::State::initialize" 155#else
45#define UCORO_STATE "_coro_state"
46 156
47/* The next macro should declare a variable stacklevel that contains and approximation 157# define LOCK (void)0
48 * to the current C stack pointer. Its property is that it changes with each call 158# define UNLOCK (void)0
49 * and should be unique. */
50#define dSTACKLEVEL void *stacklevel = &stacklevel
51 159
52#define IN_DESTRUCT (PL_main_cv == Nullcv) 160#endif
53 161
54#define labs(l) ((l) >= 0 ? (l) : -(l)) 162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
55 166
56#include "CoroAPI.h" 167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
57 176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
58static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile char next_has_throw; /* speedup flag for next->throw check */
59 187
60/* this is actually not only the c stack but also c registers etc... */ 188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
201
202static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle;
204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
213
214/* this is a structure representing a c-level coroutine */
215typedef struct coro_cctx {
216 struct coro_cctx *next;
217
218 /* the stack */
219 void *sptr;
220 size_t ssize;
221
222 /* cpu state */
223 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
224 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
225 JMPENV *top_env;
226 coro_context cctx;
227
228 U32 gen;
229#if CORO_USE_VALGRIND
230 int valgrind_id;
231#endif
232 unsigned char flags;
233} coro_cctx;
234
235enum {
236 CF_RUNNING = 0x0001, /* coroutine is running */
237 CF_READY = 0x0002, /* coroutine is ready */
238 CF_NEW = 0x0004, /* has never been switched to */
239 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
240};
241
242/* the structure where most of the perl state is stored, overlaid on the cxstack */
61typedef struct { 243typedef struct {
62 int refcnt; /* pointer reference counter */ 244 SV *defsv;
63 int usecnt; /* shared by how many coroutines */ 245 AV *defav;
64 int gencnt; /* generation counter */ 246 SV *errsv;
247 SV *irsgv;
248#define VAR(name,type) type name;
249# include "state.h"
250#undef VAR
251} perl_slots;
65 252
66 coro_context cctx; 253#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
67 254
68 void *sptr; 255/* this is a structure representing a perl-level coroutine */
69 long ssize; /* positive == mmap, otherwise malloc */
70} coro_stack;
71
72struct coro { 256struct coro {
73 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 257 /* the c coroutine allocated to this perl coroutine, if any */
74 JMPENV start_env; 258 coro_cctx *cctx;
75 259
76 /* the optional C context */ 260 /* process data */
77 coro_stack *stack;
78 void *cursp;
79 int gencnt;
80
81 /* optionally saved, might be zero */
82 AV *defav;
83 SV *defsv;
84 SV *errsv;
85
86 /* saved global state not related to stacks */
87 U8 dowarn;
88 I32 in_eval;
89
90 /* the stacks and related info (callchain etc..) */
91 PERL_SI *curstackinfo;
92 AV *curstack;
93 AV *mainstack; 261 AV *mainstack;
94 SV **stack_sp; 262 perl_slots *slot; /* basically the saved sp */
95 OP *op;
96 SV **curpad;
97 AV *comppad;
98 SV **stack_base;
99 SV **stack_max;
100 SV **tmps_stack;
101 I32 tmps_floor;
102 I32 tmps_ix;
103 I32 tmps_max;
104 I32 *markstack;
105 I32 *markstack_ptr;
106 I32 *markstack_max;
107 I32 *scopestack;
108 I32 scopestack_ix;
109 I32 scopestack_max;
110 ANY *savestack;
111 I32 savestack_ix;
112 I32 savestack_max;
113 OP **retstack;
114 I32 retstack_ix;
115 I32 retstack_max;
116 COP *curcop;
117 JMPENV *top_env;
118 263
119 /* data associated with this coroutine (initial args) */ 264 AV *args; /* data associated with this coroutine (initial args) */
120 AV *args; 265 int refcnt; /* coroutines are refcounted, yes */
266 int flags; /* CF_ flags */
267 HV *hv; /* the perl hash associated with this coro, if any */
268
269 /* statistics */
270 int usecount; /* number of transfers to this coro */
271
272 /* coro process data */
273 int prio;
274 SV *throw; /* exception to be thrown */
275
276 /* async_pool */
277 SV *saved_deffh;
278
279 /* linked list */
280 struct coro *next, *prev;
121}; 281};
122 282
123typedef struct coro *Coro__State; 283typedef struct coro *Coro__State;
124typedef struct coro *Coro__State_or_hashref; 284typedef struct coro *Coro__State_or_hashref;
125 285
126static AV *main_mainstack; /* used to differentiate between $main and others */ 286/** Coro ********************************************************************/
127static HV *coro_state_stash;
128static SV *ucoro_state_sv;
129static U32 ucoro_state_hash;
130static HV *padlist_cache;
131static SV *coro_mortal; /* will be freed after next transfer */
132 287
133/* mostly copied from op.c:cv_clone2 */ 288#define PRIO_MAX 3
134STATIC AV * 289#define PRIO_HIGH 1
135clone_padlist (AV *protopadlist) 290#define PRIO_NORMAL 0
291#define PRIO_LOW -1
292#define PRIO_IDLE -3
293#define PRIO_MIN -4
294
295/* for Coro.pm */
296static SV *coro_current;
297static SV *coro_readyhook;
298static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
299static int coro_nready;
300static struct coro *coro_first;
301
302/** lowlevel stuff **********************************************************/
303
304static SV *
305coro_get_sv (pTHX_ const char *name, int create)
136{ 306{
137 AV *av; 307#if PERL_VERSION_ATLEAST (5,10,0)
138 I32 ix; 308 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
139 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 309 get_sv (name, create);
140 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 310#endif
141 SV **pname = AvARRAY (protopad_name); 311 return get_sv (name, create);
142 SV **ppad = AvARRAY (protopad); 312}
143 I32 fname = AvFILLp (protopad_name); 313
144 I32 fpad = AvFILLp (protopad); 314static AV *
315coro_get_av (pTHX_ const char *name, int create)
316{
317#if PERL_VERSION_ATLEAST (5,10,0)
318 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
319 get_av (name, create);
320#endif
321 return get_av (name, create);
322}
323
324static HV *
325coro_get_hv (pTHX_ const char *name, int create)
326{
327#if PERL_VERSION_ATLEAST (5,10,0)
328 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
329 get_hv (name, create);
330#endif
331 return get_hv (name, create);
332}
333
334static AV *
335coro_clone_padlist (pTHX_ CV *cv)
336{
337 AV *padlist = CvPADLIST (cv);
145 AV *newpadlist, *newpad_name, *newpad; 338 AV *newpadlist, *newpad;
146 SV **npad;
147
148 newpad_name = newAV ();
149 for (ix = fname; ix >= 0; ix--)
150 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152 newpad = newAV ();
153 av_fill (newpad, AvFILLp (protopad));
154 npad = AvARRAY (newpad);
155 339
156 newpadlist = newAV (); 340 newpadlist = newAV ();
157 AvREAL_off (newpadlist); 341 AvREAL_off (newpadlist);
158 av_store (newpadlist, 0, (SV *) newpad_name); 342#if PERL_VERSION_ATLEAST (5,10,0)
343 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
344#else
345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
346#endif
347 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
348 --AvFILLp (padlist);
349
350 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
159 av_store (newpadlist, 1, (SV *) newpad); 351 av_store (newpadlist, 1, (SV *)newpad);
160
161 av = newAV (); /* will be @_ */
162 av_extend (av, 0);
163 av_store (newpad, 0, (SV *) av);
164 AvFLAGS (av) = AVf_REIFY;
165
166 for (ix = fpad; ix > 0; ix--)
167 {
168 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169 if (namesv && namesv != &PL_sv_undef)
170 {
171 char *name = SvPVX (namesv); /* XXX */
172 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173 { /* lexical from outside? */
174 npad[ix] = SvREFCNT_inc (ppad[ix]);
175 }
176 else
177 { /* our own lexical */
178 SV *sv;
179 if (*name == '&')
180 sv = SvREFCNT_inc (ppad[ix]);
181 else if (*name == '@')
182 sv = (SV *) newAV ();
183 else if (*name == '%')
184 sv = (SV *) newHV ();
185 else
186 sv = NEWSV (0, 0);
187#ifdef SvPADBUSY
188 if (!SvPADBUSY (sv))
189#endif
190 SvPADMY_on (sv);
191 npad[ix] = sv;
192 }
193 }
194 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195 {
196 npad[ix] = SvREFCNT_inc (ppad[ix]);
197 }
198 else
199 {
200 SV *sv = NEWSV (0, 0);
201 SvPADTMP_on (sv);
202 npad[ix] = sv;
203 }
204 }
205
206#if 0 /* return -ENOTUNDERSTOOD */
207 /* Now that vars are all in place, clone nested closures. */
208
209 for (ix = fpad; ix > 0; ix--) {
210 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211 if (namesv
212 && namesv != &PL_sv_undef
213 && !(SvFLAGS(namesv) & SVf_FAKE)
214 && *SvPVX(namesv) == '&'
215 && CvCLONE(ppad[ix]))
216 {
217 CV *kid = cv_clone((CV*)ppad[ix]);
218 SvREFCNT_dec(ppad[ix]);
219 CvCLONE_on(kid);
220 SvPADMY_on(kid);
221 npad[ix] = (SV*)kid;
222 }
223 }
224#endif
225 352
226 return newpadlist; 353 return newpadlist;
227} 354}
228 355
229STATIC void 356static void
230free_padlist (AV *padlist) 357free_padlist (pTHX_ AV *padlist)
231{ 358{
232 /* may be during global destruction */ 359 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 360 if (SvREFCNT (padlist))
234 { 361 {
235 I32 i = AvFILLp (padlist); 362 I32 i = AvFILLp (padlist);
… …
248 375
249 SvREFCNT_dec ((SV*)padlist); 376 SvREFCNT_dec ((SV*)padlist);
250 } 377 }
251} 378}
252 379
253STATIC int 380static int
254coro_cv_free (SV *sv, MAGIC *mg) 381coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255{ 382{
256 AV *padlist; 383 AV *padlist;
257 AV *av = (AV *)mg->mg_obj; 384 AV *av = (AV *)mg->mg_obj;
258 385
259 /* casting is fun. */ 386 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 387 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist); 388 free_padlist (aTHX_ padlist);
262}
263 389
390 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
391
392 return 0;
393}
394
264#define PERL_MAGIC_coro PERL_MAGIC_ext 395#define CORO_MAGIC_type_cv PERL_MAGIC_ext
396#define CORO_MAGIC_type_state PERL_MAGIC_ext
265 397
266static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 398static MGVTBL coro_cv_vtbl = {
399 0, 0, 0, 0,
400 coro_cv_free
401};
402
403#define CORO_MAGIC(sv, type) \
404 SvMAGIC (sv) \
405 ? SvMAGIC (sv)->mg_type == type \
406 ? SvMAGIC (sv) \
407 : mg_find (sv, type) \
408 : 0
409
410#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
411#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
412
413static struct coro *
414SvSTATE_ (pTHX_ SV *coro)
415{
416 HV *stash;
417 MAGIC *mg;
418
419 if (SvROK (coro))
420 coro = SvRV (coro);
421
422 if (expect_false (SvTYPE (coro) != SVt_PVHV))
423 croak ("Coro::State object required");
424
425 stash = SvSTASH (coro);
426 if (expect_false (stash != coro_stash && stash != coro_state_stash))
427 {
428 /* very slow, but rare, check */
429 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
430 croak ("Coro::State object required");
431 }
432
433 mg = CORO_MAGIC_state (coro);
434 return (struct coro *)mg->mg_ptr;
435}
436
437#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
267 438
268/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
269STATIC void 440static void
270get_padlist (CV *cv) 441get_padlist (pTHX_ CV *cv)
271{ 442{
272 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
444 AV *av;
273 445
274 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
275 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276 else 448 else
277 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
278}
279
280STATIC void
281put_padlist (CV *cv)
282{
283 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
284
285 if (!mg)
286 { 449 {
287 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 450#if CORO_PREFER_PERL_FUNCTIONS
288 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 451 /* this is probably cleaner? but also slower! */
289 mg->mg_virtual = &vtbl_coro; 452 /* in practise, it seems to be less stable */
290 mg->mg_obj = (SV *)newAV (); 453 CV *cp = Perl_cv_clone (cv);
454 CvPADLIST (cv) = CvPADLIST (cp);
455 CvPADLIST (cp) = 0;
456 SvREFCNT_dec (cp);
457#else
458 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
459#endif
291 } 460 }
292
293 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
294} 461}
295
296#define SB do {
297#define SE } while (0)
298
299#define LOAD(state) load_state(aTHX_ (state));
300#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
301
302#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
303 462
304static void 463static void
464put_padlist (pTHX_ CV *cv)
465{
466 MAGIC *mg = CORO_MAGIC_cv (cv);
467 AV *av;
468
469 if (expect_false (!mg))
470 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
471
472 av = (AV *)mg->mg_obj;
473
474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
475 av_extend (av, AvMAX (av) + 1);
476
477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
478}
479
480/** load & save, init *******************************************************/
481
482static void
305load_state(pTHX_ Coro__State c) 483load_perl (pTHX_ Coro__State c)
306{ 484{
307 PL_dowarn = c->dowarn; 485 perl_slots *slot = c->slot;
308 PL_in_eval = c->in_eval; 486 c->slot = 0;
309 487
310 PL_curstackinfo = c->curstackinfo;
311 PL_curstack = c->curstack;
312 PL_mainstack = c->mainstack; 488 PL_mainstack = c->mainstack;
313 PL_stack_sp = c->stack_sp;
314 PL_op = c->op;
315 PL_curpad = c->curpad;
316 PL_comppad = c->comppad;
317 PL_stack_base = c->stack_base;
318 PL_stack_max = c->stack_max;
319 PL_tmps_stack = c->tmps_stack;
320 PL_tmps_floor = c->tmps_floor;
321 PL_tmps_ix = c->tmps_ix;
322 PL_tmps_max = c->tmps_max;
323 PL_markstack = c->markstack;
324 PL_markstack_ptr = c->markstack_ptr;
325 PL_markstack_max = c->markstack_max;
326 PL_scopestack = c->scopestack;
327 PL_scopestack_ix = c->scopestack_ix;
328 PL_scopestack_max = c->scopestack_max;
329 PL_savestack = c->savestack;
330 PL_savestack_ix = c->savestack_ix;
331 PL_savestack_max = c->savestack_max;
332 PL_retstack = c->retstack;
333 PL_retstack_ix = c->retstack_ix;
334 PL_retstack_max = c->retstack_max;
335 PL_curcop = c->curcop;
336 PL_top_env = c->top_env;
337 489
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 490 GvSV (PL_defgv) = slot->defsv;
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 491 GvAV (PL_defgv) = slot->defav;
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
495 #define VAR(name,type) PL_ ## name = slot->name;
496 # include "state.h"
497 #undef VAR
341 498
342 { 499 {
343 dSP; 500 dSP;
501
344 CV *cv; 502 CV *cv;
345 503
346 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
347 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
348 { 506 {
349 AV *padlist = (AV *)POPs;
350
351 if (padlist)
352 {
353 put_padlist (cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
354 CvPADLIST(cv) = padlist; 508 CvDEPTH (cv) = PTR2IV (POPs);
355#ifdef USE_THREADS 509 CvPADLIST (cv) = (AV *)POPs;
356 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357#endif
358 }
359
360 ++CvDEPTH(cv);
361 } 510 }
362 511
363 PUTBACK; 512 PUTBACK;
364 } 513 }
365} 514}
366 515
367static void 516static void
368save_state(pTHX_ Coro__State c, int flags) 517save_perl (pTHX_ Coro__State c)
369{ 518{
370 { 519 {
371 dSP; 520 dSP;
372 I32 cxix = cxstack_ix; 521 I32 cxix = cxstack_ix;
373 PERL_CONTEXT *ccstk = cxstack; 522 PERL_CONTEXT *ccstk = cxstack;
… …
376 /* 525 /*
377 * the worst thing you can imagine happens first - we have to save 526 * the worst thing you can imagine happens first - we have to save
378 * (and reinitialize) all cv's in the whole callchain :( 527 * (and reinitialize) all cv's in the whole callchain :(
379 */ 528 */
380 529
381 PUSHs (Nullsv); 530 XPUSHs (Nullsv);
382 /* this loop was inspired by pp_caller */ 531 /* this loop was inspired by pp_caller */
383 for (;;) 532 for (;;)
384 { 533 {
385 while (cxix >= 0) 534 while (expect_true (cxix >= 0))
386 { 535 {
387 PERL_CONTEXT *cx = &ccstk[cxix--]; 536 PERL_CONTEXT *cx = &ccstk[cxix--];
388 537
389 if (CxTYPE(cx) == CXt_SUB) 538 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
390 { 539 {
391 CV *cv = cx->blk_sub.cv; 540 CV *cv = cx->blk_sub.cv;
541
392 if (CvDEPTH(cv)) 542 if (expect_true (CvDEPTH (cv)))
393 { 543 {
394#ifdef USE_THREADS
395 /*XPUSHs ((SV *)CvOWNER(cv));*/
396 /*CvOWNER(cv) = 0;*/
397 /*error must unlock this cv etc.. etc...*/
398#endif
399 EXTEND (SP, CvDEPTH(cv)*2); 544 EXTEND (SP, 3);
400
401 while (--CvDEPTH(cv))
402 {
403 /* this tells the restore code to increment CvDEPTH */
404 PUSHs (Nullsv);
405 PUSHs ((SV *)cv);
406 }
407
408 PUSHs ((SV *)CvPADLIST(cv)); 545 PUSHs ((SV *)CvPADLIST (cv));
546 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
409 PUSHs ((SV *)cv); 547 PUSHs ((SV *)cv);
410 548
411 get_padlist (cv); /* this is a monster */ 549 CvDEPTH (cv) = 0;
550 get_padlist (aTHX_ cv);
412 } 551 }
413 } 552 }
414#ifdef CXt_FORMAT
415 else if (CxTYPE(cx) == CXt_FORMAT)
416 {
417 /* I never used formats, so how should I know how these are implemented? */
418 /* my bold guess is as a simple, plain sub... */
419 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420 }
421#endif
422 } 553 }
423 554
424 if (top_si->si_type == PERLSI_MAIN) 555 if (expect_true (top_si->si_type == PERLSI_MAIN))
425 break; 556 break;
426 557
427 top_si = top_si->si_prev; 558 top_si = top_si->si_prev;
428 ccstk = top_si->si_cxstack; 559 ccstk = top_si->si_cxstack;
429 cxix = top_si->si_cxix; 560 cxix = top_si->si_cxix;
430 } 561 }
431 562
432 PUTBACK; 563 PUTBACK;
433 } 564 }
434 565
435 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 566 /* allocate some space on the context stack for our purposes */
436 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 567 /* we manually unroll here, as usually 2 slots is enough */
437 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 568 if (SLOT_COUNT >= 1) CXINC;
569 if (SLOT_COUNT >= 2) CXINC;
570 if (SLOT_COUNT >= 3) CXINC;
571 {
572 int i;
573 for (i = 3; i < SLOT_COUNT; ++i)
574 CXINC;
575 }
576 cxstack_ix -= SLOT_COUNT; /* undo allocation */
438 577
439 c->dowarn = PL_dowarn;
440 c->in_eval = PL_in_eval;
441
442 c->curstackinfo = PL_curstackinfo;
443 c->curstack = PL_curstack;
444 c->mainstack = PL_mainstack; 578 c->mainstack = PL_mainstack;
445 c->stack_sp = PL_stack_sp; 579
446 c->op = PL_op; 580 {
447 c->curpad = PL_curpad; 581 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
448 c->comppad = PL_comppad; 582
449 c->stack_base = PL_stack_base; 583 slot->defav = GvAV (PL_defgv);
450 c->stack_max = PL_stack_max; 584 slot->defsv = DEFSV;
451 c->tmps_stack = PL_tmps_stack; 585 slot->errsv = ERRSV;
452 c->tmps_floor = PL_tmps_floor; 586 slot->irsgv = GvSV (irsgv);
453 c->tmps_ix = PL_tmps_ix; 587
454 c->tmps_max = PL_tmps_max; 588 #define VAR(name,type) slot->name = PL_ ## name;
455 c->markstack = PL_markstack; 589 # include "state.h"
456 c->markstack_ptr = PL_markstack_ptr; 590 #undef VAR
457 c->markstack_max = PL_markstack_max; 591 }
458 c->scopestack = PL_scopestack;
459 c->scopestack_ix = PL_scopestack_ix;
460 c->scopestack_max = PL_scopestack_max;
461 c->savestack = PL_savestack;
462 c->savestack_ix = PL_savestack_ix;
463 c->savestack_max = PL_savestack_max;
464 c->retstack = PL_retstack;
465 c->retstack_ix = PL_retstack_ix;
466 c->retstack_max = PL_retstack_max;
467 c->curcop = PL_curcop;
468 c->top_env = PL_top_env;
469} 592}
470 593
471/* 594/*
472 * allocate various perl stacks. This is an exact copy 595 * allocate various perl stacks. This is an exact copy
473 * of perl.c:init_stacks, except that it uses less memory 596 * of perl.c:init_stacks, except that it uses less memory
474 * on the (sometimes correct) assumption that coroutines do 597 * on the (sometimes correct) assumption that coroutines do
475 * not usually need a lot of stackspace. 598 * not usually need a lot of stackspace.
476 */ 599 */
477STATIC void 600#if CORO_PREFER_PERL_FUNCTIONS
601# define coro_init_stacks init_stacks
602#else
603static void
478coro_init_stacks (pTHX) 604coro_init_stacks (pTHX)
479{ 605{
480 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 606 PL_curstackinfo = new_stackinfo(32, 8);
481 PL_curstackinfo->si_type = PERLSI_MAIN; 607 PL_curstackinfo->si_type = PERLSI_MAIN;
482 PL_curstack = PL_curstackinfo->si_stack; 608 PL_curstack = PL_curstackinfo->si_stack;
483 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 609 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484 610
485 PL_stack_base = AvARRAY(PL_curstack); 611 PL_stack_base = AvARRAY(PL_curstack);
486 PL_stack_sp = PL_stack_base; 612 PL_stack_sp = PL_stack_base;
487 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 613 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488 614
489 New(50,PL_tmps_stack,96,SV*); 615 New(50,PL_tmps_stack,32,SV*);
490 PL_tmps_floor = -1; 616 PL_tmps_floor = -1;
491 PL_tmps_ix = -1; 617 PL_tmps_ix = -1;
492 PL_tmps_max = 96; 618 PL_tmps_max = 32;
493 619
494 New(54,PL_markstack,16,I32); 620 New(54,PL_markstack,16,I32);
495 PL_markstack_ptr = PL_markstack; 621 PL_markstack_ptr = PL_markstack;
496 PL_markstack_max = PL_markstack + 16; 622 PL_markstack_max = PL_markstack + 16;
497 623
498#ifdef SET_MARK_OFFSET 624#ifdef SET_MARK_OFFSET
499 SET_MARK_OFFSET; 625 SET_MARK_OFFSET;
500#endif 626#endif
501 627
502 New(54,PL_scopestack,16,I32); 628 New(54,PL_scopestack,8,I32);
503 PL_scopestack_ix = 0; 629 PL_scopestack_ix = 0;
504 PL_scopestack_max = 16; 630 PL_scopestack_max = 8;
505 631
506 New(54,PL_savestack,96,ANY); 632 New(54,PL_savestack,24,ANY);
507 PL_savestack_ix = 0; 633 PL_savestack_ix = 0;
508 PL_savestack_max = 96; 634 PL_savestack_max = 24;
509 635
636#if !PERL_VERSION_ATLEAST (5,10,0)
510 New(54,PL_retstack,8,OP*); 637 New(54,PL_retstack,4,OP*);
511 PL_retstack_ix = 0; 638 PL_retstack_ix = 0;
512 PL_retstack_max = 8; 639 PL_retstack_max = 4;
640#endif
513} 641}
642#endif
514 643
515/* 644/*
516 * destroy the stacks, the callchain etc... 645 * destroy the stacks, the callchain etc...
517 */ 646 */
518STATIC void 647static void
519destroy_stacks(pTHX) 648coro_destruct_stacks (pTHX)
520{ 649{
521 if (!IN_DESTRUCT)
522 {
523 /* is this ugly, I ask? */
524 LEAVE_SCOPE (0);
525
526 /* sure it is, but more important: is it correct?? :/ */
527 FREETMPS;
528 }
529
530 while (PL_curstackinfo->si_next) 650 while (PL_curstackinfo->si_next)
531 PL_curstackinfo = PL_curstackinfo->si_next; 651 PL_curstackinfo = PL_curstackinfo->si_next;
532 652
533 while (PL_curstackinfo) 653 while (PL_curstackinfo)
534 { 654 {
535 PERL_SI *p = PL_curstackinfo->si_prev; 655 PERL_SI *p = PL_curstackinfo->si_prev;
536 656
537 {
538 dSP;
539 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540 PUTBACK; /* possibly superfluous */
541 }
542
543 if (!IN_DESTRUCT) 657 if (!IN_DESTRUCT)
544 {
545 dounwind(-1);
546 SvREFCNT_dec(PL_curstackinfo->si_stack); 658 SvREFCNT_dec (PL_curstackinfo->si_stack);
547 }
548 659
549 Safefree(PL_curstackinfo->si_cxstack); 660 Safefree (PL_curstackinfo->si_cxstack);
550 Safefree(PL_curstackinfo); 661 Safefree (PL_curstackinfo);
551 PL_curstackinfo = p; 662 PL_curstackinfo = p;
552 } 663 }
553 664
554 Safefree(PL_tmps_stack); 665 Safefree (PL_tmps_stack);
555 Safefree(PL_markstack); 666 Safefree (PL_markstack);
556 Safefree(PL_scopestack); 667 Safefree (PL_scopestack);
557 Safefree(PL_savestack); 668 Safefree (PL_savestack);
669#if !PERL_VERSION_ATLEAST (5,10,0)
558 Safefree(PL_retstack); 670 Safefree (PL_retstack);
671#endif
672}
673
674static size_t
675coro_rss (pTHX_ struct coro *coro)
676{
677 size_t rss = sizeof (*coro);
678
679 if (coro->mainstack)
680 {
681 perl_slots tmp_slot;
682 perl_slots *slot;
683
684 if (coro->flags & CF_RUNNING)
685 {
686 slot = &tmp_slot;
687
688 #define VAR(name,type) slot->name = PL_ ## name;
689 # include "state.h"
690 #undef VAR
691 }
692 else
693 slot = coro->slot;
694
695 if (slot)
696 {
697 rss += sizeof (slot->curstackinfo);
698 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
699 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
700 rss += slot->tmps_max * sizeof (SV *);
701 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
702 rss += slot->scopestack_max * sizeof (I32);
703 rss += slot->savestack_max * sizeof (ANY);
704
705#if !PERL_VERSION_ATLEAST (5,10,0)
706 rss += slot->retstack_max * sizeof (OP *);
707#endif
708 }
709 }
710
711 return rss;
712}
713
714/** coroutine stack handling ************************************************/
715
716static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
717static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
718static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
719
720/* apparently < 5.8.8 */
721#ifndef MgPV_nolen_const
722#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
723 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
724 (const char*)(mg)->mg_ptr)
725#endif
726
727/*
728 * This overrides the default magic get method of %SIG elements.
729 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
730 * and instead of tryign to save and restore the hash elements, we just provide
731 * readback here.
732 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
733 * not expecting this to actually change the hook. This is a potential problem
734 * when a schedule happens then, but we ignore this.
735 */
736static int
737coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
738{
739 const char *s = MgPV_nolen_const (mg);
740
741 if (*s == '_')
742 {
743 SV **svp = 0;
744
745 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
746 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
747
748 if (svp)
749 {
750 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
751 return 0;
752 }
753 }
754
755 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
756}
757
758static int
759coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
760{
761 const char *s = MgPV_nolen_const (mg);
762
763 if (*s == '_')
764 {
765 SV **svp = 0;
766
767 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
768 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
769
770 if (svp)
771 {
772 SV *old = *svp;
773 *svp = 0;
774 SvREFCNT_dec (old);
775 return 0;
776 }
777 }
778
779 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
780}
781
782static int
783coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
784{
785 const char *s = MgPV_nolen_const (mg);
786
787 if (*s == '_')
788 {
789 SV **svp = 0;
790
791 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
792 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
793
794 if (svp)
795 {
796 SV *old = *svp;
797 *svp = newSVsv (sv);
798 SvREFCNT_dec (old);
799 return 0;
800 }
801 }
802
803 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
559} 804}
560 805
561static void 806static void
562allocate_stack (Coro__State ctx, int alloc) 807coro_setup (pTHX_ struct coro *coro)
563{
564 coro_stack *stack;
565
566 New (0, stack, 1, coro_stack);
567
568 stack->refcnt = 1;
569 stack->usecnt = 1;
570 stack->gencnt = ctx->gencnt = 0;
571 if (alloc)
572 {
573#if HAVE_MMAP
574 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
575 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
576 if (stack->sptr == (void *)-1)
577#endif
578 {
579 /*FIXME*//*D*//* reasonable stack size! */
580 stack->ssize = - (16384 * sizeof (long));
581 New (0, stack->sptr, 16384, long);
582 }
583 }
584 else
585 stack->sptr = 0;
586
587 ctx->stack = stack;
588}
589
590static void
591deallocate_stack (Coro__State ctx)
592{
593 coro_stack *stack = ctx->stack;
594
595 ctx->stack = 0;
596
597 if (stack)
598 {
599 if (!--stack->refcnt)
600 {
601#ifdef HAVE_MMAP
602 if (stack->ssize > 0 && stack->sptr)
603 munmap (stack->sptr, stack->ssize);
604 else
605#endif
606 Safefree (stack->sptr);
607
608 Safefree (stack);
609 }
610 else if (ctx->gencnt == stack->gencnt)
611 --stack->usecnt;
612 }
613}
614
615static void
616setup_coro (void *arg)
617{ 808{
618 /* 809 /*
619 * emulate part of the perl startup here. 810 * emulate part of the perl startup here.
620 */ 811 */
621 dSP;
622 Coro__State ctx = (Coro__State)arg;
623 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
624
625 coro_init_stacks (aTHX); 812 coro_init_stacks (aTHX);
626 /*PL_curcop = 0;*/ 813
627 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 814 PL_runops = RUNOPS_DEFAULT;
815 PL_curcop = &PL_compiling;
816 PL_in_eval = EVAL_NULL;
817 PL_comppad = 0;
818 PL_curpm = 0;
819 PL_curpad = 0;
820 PL_localizing = 0;
821 PL_dirty = 0;
822 PL_restartop = 0;
823#if PERL_VERSION_ATLEAST (5,10,0)
824 PL_parser = 0;
825#endif
826
827 /* recreate the die/warn hooks */
828 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
829 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
830
831 GvSV (PL_defgv) = newSV (0);
832 GvAV (PL_defgv) = coro->args; coro->args = 0;
833 GvSV (PL_errgv) = newSV (0);
834 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
835 PL_rs = newSVsv (GvSV (irsgv));
836 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
837
838 {
839 dSP;
840 LOGOP myop;
841
842 Zero (&myop, 1, LOGOP);
843 myop.op_next = Nullop;
844 myop.op_flags = OPf_WANT_VOID;
845
846 PUSHMARK (SP);
847 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
848 PUTBACK;
849 PL_op = (OP *)&myop;
850 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
851 SPAGAIN;
852 }
853
854 /* this newly created coroutine might be run on an existing cctx which most
855 * likely was suspended in set_stacklevel, called from entersub.
856 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
857 * so we ENTER here for symmetry
858 */
859 ENTER;
860}
861
862static void
863coro_destruct (pTHX_ struct coro *coro)
864{
865 if (!IN_DESTRUCT)
866 {
867 /* restore all saved variables and stuff */
868 LEAVE_SCOPE (0);
869 assert (PL_tmps_floor == -1);
870
871 /* free all temporaries */
872 FREETMPS;
873 assert (PL_tmps_ix == -1);
874
875 /* unwind all extra stacks */
876 POPSTACK_TO (PL_mainstack);
877
878 /* unwind main stack */
879 dounwind (-1);
880 }
881
882 SvREFCNT_dec (GvSV (PL_defgv));
628 SvREFCNT_dec (GvAV (PL_defgv)); 883 SvREFCNT_dec (GvAV (PL_defgv));
629 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 884 SvREFCNT_dec (GvSV (PL_errgv));
885 SvREFCNT_dec (PL_defoutgv);
886 SvREFCNT_dec (PL_rs);
887 SvREFCNT_dec (GvSV (irsgv));
630 888
631 SPAGAIN; 889 SvREFCNT_dec (PL_diehook);
890 SvREFCNT_dec (PL_warnhook);
891
892 SvREFCNT_dec (coro->saved_deffh);
893 SvREFCNT_dec (coro->throw);
632 894
633 if (ctx->stack) 895 coro_destruct_stacks (aTHX);
634 {
635 ctx->cursp = 0;
636
637 PUSHMARK(SP);
638 PUTBACK;
639 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
640
641 if (SvTRUE (ERRSV))
642 croak (NULL);
643 else
644 croak ("FATAL: CCTXT coroutine returned!");
645 }
646 else
647 {
648 UNOP myop;
649
650 PL_op = (OP *)&myop;
651
652 Zero(&myop, 1, UNOP);
653 myop.op_next = Nullop;
654 myop.op_flags = OPf_WANT_VOID;
655
656 PUSHMARK(SP);
657 XPUSHs (sub_init);
658 /*
659 * the next line is slightly wrong, as PL_op->op_next
660 * is actually being executed so we skip the first op.
661 * that doesn't matter, though, since it is only
662 * pp_nextstate and we never return...
663 * ah yes, and I don't care anyways ;)
664 */
665 PUTBACK;
666 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667 SPAGAIN;
668
669 ENTER; /* necessary e.g. for dounwind */
670 }
671} 896}
672 897
673static void 898static void
674continue_coro (void *arg) 899free_coro_mortal (pTHX)
675{ 900{
676 /* 901 if (expect_true (coro_mortal))
677 * this is a _very_ stripped down perl interpreter ;) 902 {
678 */ 903 SvREFCNT_dec (coro_mortal);
679 Coro__State ctx = (Coro__State)arg; 904 coro_mortal = 0;
680 JMPENV coro_start_env;
681
682 PL_top_env = &ctx->start_env;
683
684 ctx->cursp = 0;
685 PL_op = PL_op->op_next;
686 CALLRUNOPS(aTHX);
687
688 abort ();
689}
690
691STATIC void
692transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
693{
694 dSTACKLEVEL;
695 static struct coro *xnext;
696
697 if (prev != next)
698 { 905 }
699 xnext = next; 906}
700 907
701 if (next->mainstack) 908static int
909runops_trace (pTHX)
910{
911 COP *oldcop = 0;
912 int oldcxix = -2;
913 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
914 coro_cctx *cctx = coro->cctx;
915
916 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
917 {
918 PERL_ASYNC_CHECK ();
919
920 if (cctx->flags & CC_TRACE_ALL)
702 { 921 {
703 SAVE (prev, flags); 922 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
704 LOAD (next);
705
706 /* mark this state as in-use */
707 next->mainstack = 0;
708 next->tmps_ix = -2;
709
710 /* stacklevel changed? if yes, grab the stack for us! */
711 if (flags & TRANSFER_SAVE_CCTXT)
712 { 923 {
713 if (!prev->stack) 924 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
714 allocate_stack (prev, 0); 925 SV **bot, **top;
715 else if (prev->cursp != stacklevel 926 AV *av = newAV (); /* return values */
716 && prev->stack->usecnt > 1) 927 SV **cb;
928 dSP;
929
930 GV *gv = CvGV (cx->blk_sub.cv);
931 SV *fullname = sv_2mortal (newSV (0));
932 if (isGV (gv))
933 gv_efullname3 (fullname, gv, 0);
934
935 bot = PL_stack_base + cx->blk_oldsp + 1;
936 top = cx->blk_gimme == G_ARRAY ? SP + 1
937 : cx->blk_gimme == G_SCALAR ? bot + 1
938 : bot;
939
940 av_extend (av, top - bot);
941 while (bot < top)
942 av_push (av, SvREFCNT_inc_NN (*bot++));
943
944 PL_runops = RUNOPS_DEFAULT;
945 ENTER;
946 SAVETMPS;
947 EXTEND (SP, 3);
948 PUSHMARK (SP);
949 PUSHs (&PL_sv_no);
950 PUSHs (fullname);
951 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
952 PUTBACK;
953 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
954 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
955 SPAGAIN;
956 FREETMPS;
957 LEAVE;
958 PL_runops = runops_trace;
959 }
960
961 if (oldcop != PL_curcop)
962 {
963 oldcop = PL_curcop;
964
965 if (PL_curcop != &PL_compiling)
717 { 966 {
718 prev->gencnt = ++prev->stack->gencnt; 967 SV **cb;
719 prev->stack->usecnt = 1;
720 }
721 968
722 /* has our stack been invalidated? */ 969 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
723 if (next->stack && next->stack->gencnt != next->gencnt)
724 { 970 {
725 deallocate_stack (next); 971 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
726 allocate_stack (next, 1); 972
727 coro_create (&(next->stack->cctx), 973 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
728 continue_coro, (void *)next, 974 {
729 next->stack->sptr, labs (next->stack->ssize)); 975 runops_proc_t old_runops = PL_runops;
976 dSP;
977 GV *gv = CvGV (cx->blk_sub.cv);
978 SV *fullname = sv_2mortal (newSV (0));
979
980 if (isGV (gv))
981 gv_efullname3 (fullname, gv, 0);
982
983 PL_runops = RUNOPS_DEFAULT;
984 ENTER;
985 SAVETMPS;
986 EXTEND (SP, 3);
987 PUSHMARK (SP);
988 PUSHs (&PL_sv_yes);
989 PUSHs (fullname);
990 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
991 PUTBACK;
992 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
993 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
994 SPAGAIN;
995 FREETMPS;
996 LEAVE;
997 PL_runops = runops_trace;
998 }
999
1000 oldcxix = cxstack_ix;
730 } 1001 }
731 1002
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1003 if (cctx->flags & CC_TRACE_LINE)
733 /* don't add any code here */
734 }
735
736 }
737 else if (next->tmps_ix == -2)
738 croak ("tried to transfer to running coroutine");
739 else
740 {
741 SAVE (prev, -1); /* first get rid of the old state */
742
743 if (flags & TRANSFER_SAVE_CCTXT)
744 {
745 if (!prev->stack)
746 allocate_stack (prev, 0);
747
748 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
749 { 1004 {
750 PL_top_env = &next->start_env; 1005 dSP;
751 1006
752 setup_coro (next); 1007 PL_runops = RUNOPS_DEFAULT;
753 1008 ENTER;
754 prev->stack->refcnt++; 1009 SAVETMPS;
755 prev->stack->usecnt++; 1010 EXTEND (SP, 3);
756 next->stack = prev->stack; 1011 PL_runops = RUNOPS_DEFAULT;
757 next->gencnt = prev->gencnt; 1012 PUSHMARK (SP);
1013 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1014 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1015 PUTBACK;
1016 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1017 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1018 SPAGAIN;
1019 FREETMPS;
1020 LEAVE;
1021 PL_runops = runops_trace;
758 } 1022 }
759 else
760 {
761 assert (!next->stack);
762 allocate_stack (next, 1);
763 coro_create (&(next->stack->cctx),
764 setup_coro, (void *)next,
765 next->stack->sptr, labs (next->stack->ssize));
766 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767 /* don't add any code here */
768 } 1023 }
769 } 1024 }
770 else
771 setup_coro (next);
772 } 1025 }
773
774 /*
775 * xnext is now either prev or next, depending on wether
776 * we switched the c stack or not. that's why I use a global
777 * variable, that should become thread-specific at one point.
778 */
779 xnext->cursp = stacklevel;
780 }
781
782 if (coro_mortal)
783 { 1026 }
784 SvREFCNT_dec (coro_mortal);
785 coro_mortal = 0;
786 }
787}
788 1027
789#define SV_CORO(sv,func) \ 1028 TAINT_NOT;
790 do { \ 1029 return 0;
791 if (SvROK (sv)) \ 1030}
792 sv = SvRV (sv); \
793 \
794 if (SvTYPE(sv) == SVt_PVHV) \
795 { \
796 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
797 \
798 if (!he) \
799 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800 \
801 (sv) = SvRV (HeVAL(he)); \
802 } \
803 \
804 /* must also be changed inside Coro::Cont::yield */ \
805 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
806 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807 \
808 } while(0)
809 1031
810#define SvSTATE(sv) (struct coro *)SvIV (sv) 1032/* inject a fake call to Coro::State::_cctx_init into the execution */
1033/* _cctx_init should be careful, as it could be called at almost any time */
1034/* during execution of a perl program */
1035/* also initialises PL_top_env */
1036static void NOINLINE
1037cctx_prepare (pTHX_ coro_cctx *cctx)
1038{
1039 dSP;
1040 LOGOP myop;
811 1041
1042 PL_top_env = &PL_start_env;
1043
1044 if (cctx->flags & CC_TRACE)
1045 PL_runops = runops_trace;
1046
1047 Zero (&myop, 1, LOGOP);
1048 myop.op_next = PL_op;
1049 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1050
1051 PUSHMARK (SP);
1052 EXTEND (SP, 2);
1053 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1054 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1055 PUTBACK;
1056 PL_op = (OP *)&myop;
1057 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1058 SPAGAIN;
1059}
1060
1061/* the tail of transfer: execute stuff we can onyl do afetr a transfer */
812static void 1062static void
1063transfer_tail (void)
1064{
1065 UNLOCK;
1066
1067 if (expect_false (next_has_throw))
1068 {
1069 struct coro *coro = SvSTATE (coro_current);
1070
1071 if (coro->throw)
1072 {
1073 SV *exception = coro->throw;
1074 coro->throw = 0;
1075 sv_setsv (ERRSV, exception);
1076 croak (0);
1077 }
1078 }
1079}
1080
1081/*
1082 * this is a _very_ stripped down perl interpreter ;)
1083 */
1084static void
1085cctx_run (void *arg)
1086{
1087#ifdef USE_ITHREADS
1088# if CORO_PTHREAD
1089 PERL_SET_CONTEXT (coro_thx);
1090# endif
1091#endif
1092 {
1093 dTHX;
1094
1095 /* we now skip the entersub that lead to transfer () */
1096 PL_op = PL_op->op_next;
1097
1098 /* inject a fake subroutine call to cctx_init */
1099 cctx_prepare (aTHX_ (coro_cctx *)arg);
1100
1101 /* cctx_run is the alternative tail of transfer () */
1102 transfer_tail ();
1103
1104 /* somebody or something will hit me for both perl_run and PL_restartop */
1105 PL_restartop = PL_op;
1106 perl_run (PL_curinterp);
1107
1108 /*
1109 * If perl-run returns we assume exit() was being called or the coro
1110 * fell off the end, which seems to be the only valid (non-bug)
1111 * reason for perl_run to return. We try to exit by jumping to the
1112 * bootstrap-time "top" top_env, as we cannot restore the "main"
1113 * coroutine as Coro has no such concept
1114 */
1115 PL_top_env = main_top_env;
1116 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1117 }
1118}
1119
1120static coro_cctx *
1121cctx_new ()
1122{
1123 coro_cctx *cctx;
1124
1125 ++cctx_count;
1126 New (0, cctx, 1, coro_cctx);
1127
1128 cctx->gen = cctx_gen;
1129 cctx->flags = 0;
1130 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel */
1131
1132 return cctx;
1133}
1134
1135/* create a new cctx only suitable as source */
1136static coro_cctx *
1137cctx_new_empty ()
1138{
1139 coro_cctx *cctx = cctx_new ();
1140
1141 cctx->sptr = 0;
1142 coro_create (&cctx->cctx, 0, 0, 0, 0);
1143
1144 return cctx;
1145}
1146
1147/* create a new cctx suitable as destination/running a perl interpreter */
1148static coro_cctx *
1149cctx_new_run ()
1150{
1151 coro_cctx *cctx = cctx_new ();
1152 void *stack_start;
1153 size_t stack_size;
1154
1155#if HAVE_MMAP
1156 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1157 /* mmap supposedly does allocate-on-write for us */
1158 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1159
1160 if (cctx->sptr != (void *)-1)
1161 {
1162# if CORO_STACKGUARD
1163 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1164# endif
1165 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1166 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1167 cctx->flags |= CC_MAPPED;
1168 }
1169 else
1170#endif
1171 {
1172 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1173 New (0, cctx->sptr, cctx_stacksize, long);
1174
1175 if (!cctx->sptr)
1176 {
1177 perror ("FATAL: unable to allocate stack for coroutine");
1178 _exit (EXIT_FAILURE);
1179 }
1180
1181 stack_start = cctx->sptr;
1182 stack_size = cctx->ssize;
1183 }
1184
1185 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1186 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1187
1188 return cctx;
1189}
1190
1191static void
1192cctx_destroy (coro_cctx *cctx)
1193{
1194 if (!cctx)
1195 return;
1196
1197 --cctx_count;
1198 coro_destroy (&cctx->cctx);
1199
1200 /* coro_transfer creates new, empty cctx's */
1201 if (cctx->sptr)
1202 {
1203#if CORO_USE_VALGRIND
1204 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1205#endif
1206
1207#if HAVE_MMAP
1208 if (cctx->flags & CC_MAPPED)
1209 munmap (cctx->sptr, cctx->ssize);
1210 else
1211#endif
1212 Safefree (cctx->sptr);
1213 }
1214
1215 Safefree (cctx);
1216}
1217
1218/* wether this cctx should be destructed */
1219#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1220
1221static coro_cctx *
1222cctx_get (pTHX)
1223{
1224 while (expect_true (cctx_first))
1225 {
1226 coro_cctx *cctx = cctx_first;
1227 cctx_first = cctx->next;
1228 --cctx_idle;
1229
1230 if (expect_true (!CCTX_EXPIRED (cctx)))
1231 return cctx;
1232
1233 cctx_destroy (cctx);
1234 }
1235
1236 return cctx_new_run ();
1237}
1238
1239static void
1240cctx_put (coro_cctx *cctx)
1241{
1242 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1243
1244 /* free another cctx if overlimit */
1245 if (expect_false (cctx_idle >= cctx_max_idle))
1246 {
1247 coro_cctx *first = cctx_first;
1248 cctx_first = first->next;
1249 --cctx_idle;
1250
1251 cctx_destroy (first);
1252 }
1253
1254 ++cctx_idle;
1255 cctx->next = cctx_first;
1256 cctx_first = cctx;
1257}
1258
1259/** coroutine switching *****************************************************/
1260
1261static void
1262transfer_check (pTHX_ struct coro *prev, struct coro *next)
1263{
1264 if (expect_true (prev != next))
1265 {
1266 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1267 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1268
1269 if (expect_false (next->flags & CF_RUNNING))
1270 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1271
1272 if (expect_false (next->flags & CF_DESTROYED))
1273 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1274
1275#if !PERL_VERSION_ATLEAST (5,10,0)
1276 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1277 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1278#endif
1279 }
1280}
1281
1282/* always use the TRANSFER macro */
1283static void NOINLINE
1284transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1285{
1286 dSTACKLEVEL;
1287
1288 /* sometimes transfer is only called to set idle_sp */
1289 if (expect_false (!next))
1290 {
1291 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1292 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1293 }
1294 else if (expect_true (prev != next))
1295 {
1296 coro_cctx *prev__cctx;
1297
1298 if (expect_false (prev->flags & CF_NEW))
1299 {
1300 /* create a new empty/source context */
1301 prev->cctx = cctx_new_empty ();
1302 prev->flags &= ~CF_NEW;
1303 prev->flags |= CF_RUNNING;
1304 }
1305
1306 prev->flags &= ~CF_RUNNING;
1307 next->flags |= CF_RUNNING;
1308
1309 LOCK;
1310
1311 /* first get rid of the old state */
1312 save_perl (aTHX_ prev);
1313
1314 if (expect_false (next->flags & CF_NEW))
1315 {
1316 /* need to start coroutine */
1317 next->flags &= ~CF_NEW;
1318 /* setup coroutine call */
1319 coro_setup (aTHX_ next);
1320 }
1321 else
1322 load_perl (aTHX_ next);
1323
1324 prev__cctx = prev->cctx;
1325
1326 if (prev__cctx->idle_sp == STACKLEVEL) asm volatile("");//D
1327
1328 /* possibly "free" the cctx */
1329 if (expect_true (
1330 prev__cctx->idle_sp == STACKLEVEL
1331 && !(prev__cctx->flags & CC_TRACE)
1332 && !force_cctx
1333 ))
1334 {
1335 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1336 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1337
1338 prev->cctx = 0;
1339
1340 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1341 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1342 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1343 if (!next->cctx)
1344 next->cctx = cctx_get (aTHX);
1345
1346 cctx_put (prev__cctx);
1347 }
1348
1349 ++next->usecount;
1350
1351 if (expect_true (!next->cctx))
1352 next->cctx = cctx_get (aTHX);
1353
1354 next_has_throw = !!next->throw;
1355
1356 if (expect_false (prev__cctx != next->cctx))
1357 {
1358 prev__cctx->top_env = PL_top_env;
1359 PL_top_env = next->cctx->top_env;
1360 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1361 }
1362
1363 free_coro_mortal (aTHX);
1364 UNLOCK;
1365
1366 transfer_tail ();
1367 }
1368}
1369
1370struct transfer_args
1371{
1372 struct coro *prev, *next;
1373};
1374
1375#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1376#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1377
1378/** high level stuff ********************************************************/
1379
1380static int
1381coro_state_destroy (pTHX_ struct coro *coro)
1382{
1383 if (coro->flags & CF_DESTROYED)
1384 return 0;
1385
1386 coro->flags |= CF_DESTROYED;
1387
1388 if (coro->flags & CF_READY)
1389 {
1390 /* reduce nready, as destroying a ready coro effectively unreadies it */
1391 /* alternative: look through all ready queues and remove the coro */
1392 LOCK;
1393 --coro_nready;
1394 UNLOCK;
1395 }
1396 else
1397 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1398
1399 if (coro->mainstack && coro->mainstack != main_mainstack)
1400 {
1401 struct coro temp;
1402
1403 if (coro->flags & CF_RUNNING)
1404 croak ("FATAL: tried to destroy currently running coroutine");
1405
1406 save_perl (aTHX_ &temp);
1407 load_perl (aTHX_ coro);
1408
1409 coro_destruct (aTHX_ coro);
1410
1411 load_perl (aTHX_ &temp);
1412
1413 coro->slot = 0;
1414 }
1415
1416 cctx_destroy (coro->cctx);
1417 SvREFCNT_dec (coro->args);
1418
1419 if (coro->next) coro->next->prev = coro->prev;
1420 if (coro->prev) coro->prev->next = coro->next;
1421 if (coro == coro_first) coro_first = coro->next;
1422
1423 return 1;
1424}
1425
1426static int
1427coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1428{
1429 struct coro *coro = (struct coro *)mg->mg_ptr;
1430 mg->mg_ptr = 0;
1431
1432 coro->hv = 0;
1433
1434 if (--coro->refcnt < 0)
1435 {
1436 coro_state_destroy (aTHX_ coro);
1437 Safefree (coro);
1438 }
1439
1440 return 0;
1441}
1442
1443static int
1444coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1445{
1446 struct coro *coro = (struct coro *)mg->mg_ptr;
1447
1448 ++coro->refcnt;
1449
1450 return 0;
1451}
1452
1453static MGVTBL coro_state_vtbl = {
1454 0, 0, 0, 0,
1455 coro_state_free,
1456 0,
1457#ifdef MGf_DUP
1458 coro_state_dup,
1459#else
1460# define MGf_DUP 0
1461#endif
1462};
1463
1464static void
1465prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1466{
1467 ta->prev = SvSTATE (prev_sv);
1468 ta->next = SvSTATE (next_sv);
1469 TRANSFER_CHECK (*ta);
1470}
1471
1472static void
813api_transfer(pTHX_ SV *prev, SV *next, int flags) 1473api_transfer (SV *prev_sv, SV *next_sv)
814{ 1474{
815 SV_CORO (prev, "Coro::transfer"); 1475 dTHX;
816 SV_CORO (next, "Coro::transfer"); 1476 struct transfer_args ta;
817 1477
818 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 1478 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1479 TRANSFER (ta, 1);
819} 1480}
820 1481
821/** Coro ********************************************************************/ 1482/** Coro ********************************************************************/
822 1483
823#define PRIO_MAX 3
824#define PRIO_HIGH 1
825#define PRIO_NORMAL 0
826#define PRIO_LOW -1
827#define PRIO_IDLE -3
828#define PRIO_MIN -4
829
830/* for Coro.pm */
831static GV *coro_current, *coro_idle;
832static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
833static int coro_nready;
834
835static void 1484static void
836coro_enq (SV *sv) 1485coro_enq (pTHX_ SV *coro_sv)
837{ 1486{
838 if (SvTYPE (sv) == SVt_PVHV)
839 {
840 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
841 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842
843 prio = prio > PRIO_MAX ? PRIO_MAX
844 : prio < PRIO_MIN ? PRIO_MIN
845 : prio;
846
847 av_push (coro_ready [prio - PRIO_MIN], sv); 1487 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
848 coro_nready++;
849
850 return;
851 }
852
853 croak ("Coro::ready tried to enqueue something that is not a coroutine");
854} 1488}
855 1489
856static SV * 1490static SV *
857coro_deq (int min_prio) 1491coro_deq (pTHX)
858{ 1492{
859 int prio = PRIO_MAX - PRIO_MIN; 1493 int prio;
860 1494
861 min_prio -= PRIO_MIN;
862 if (min_prio < 0)
863 min_prio = 0;
864
865 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1495 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
866 if (av_len (coro_ready[prio]) >= 0) 1496 if (AvFILLp (coro_ready [prio]) >= 0)
867 {
868 coro_nready--;
869 return av_shift (coro_ready[prio]); 1497 return av_shift (coro_ready [prio]);
870 }
871 1498
872 return 0; 1499 return 0;
873} 1500}
874 1501
1502static int
1503api_ready (SV *coro_sv)
1504{
1505 dTHX;
1506 struct coro *coro;
1507 SV *sv_hook;
1508 void (*xs_hook)(void);
1509
1510 if (SvROK (coro_sv))
1511 coro_sv = SvRV (coro_sv);
1512
1513 coro = SvSTATE (coro_sv);
1514
1515 if (coro->flags & CF_READY)
1516 return 0;
1517
1518 coro->flags |= CF_READY;
1519
1520 LOCK;
1521
1522 sv_hook = coro_nready ? 0 : coro_readyhook;
1523 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1524
1525 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1526 ++coro_nready;
1527
1528 UNLOCK;
1529
1530 if (sv_hook)
1531 {
1532 dSP;
1533
1534 ENTER;
1535 SAVETMPS;
1536
1537 PUSHMARK (SP);
1538 PUTBACK;
1539 call_sv (sv_hook, G_DISCARD);
1540 SPAGAIN;
1541
1542 FREETMPS;
1543 LEAVE;
1544 }
1545
1546 if (xs_hook)
1547 xs_hook ();
1548
1549 return 1;
1550}
1551
1552static int
1553api_is_ready (SV *coro_sv)
1554{
1555 dTHX;
1556 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1557}
1558
875static void 1559static void
876api_ready (SV *coro) 1560prepare_schedule (pTHX_ struct transfer_args *ta)
877{ 1561{
878 if (SvROK (coro)) 1562 SV *prev_sv, *next_sv;
879 coro = SvRV (coro);
880 1563
881 coro_enq (SvREFCNT_inc (coro)); 1564 for (;;)
1565 {
1566 LOCK;
1567 next_sv = coro_deq (aTHX);
1568
1569 /* nothing to schedule: call the idle handler */
1570 if (expect_false (!next_sv))
1571 {
1572 dSP;
1573 UNLOCK;
1574
1575 ENTER;
1576 SAVETMPS;
1577
1578 PUSHMARK (SP);
1579 PUTBACK;
1580 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1581 SPAGAIN;
1582
1583 FREETMPS;
1584 LEAVE;
1585 continue;
1586 }
1587
1588 ta->next = SvSTATE (next_sv);
1589
1590 /* cannot transfer to destroyed coros, skip and look for next */
1591 if (expect_false (ta->next->flags & CF_DESTROYED))
1592 {
1593 UNLOCK;
1594 SvREFCNT_dec (next_sv);
1595 /* coro_nready is already taken care of by destroy */
1596 continue;
1597 }
1598
1599 --coro_nready;
1600 UNLOCK;
1601 break;
1602 }
1603
1604 /* free this only after the transfer */
1605 prev_sv = SvRV (coro_current);
1606 ta->prev = SvSTATE (prev_sv);
1607 TRANSFER_CHECK (*ta);
1608 assert (ta->next->flags & CF_READY);
1609 ta->next->flags &= ~CF_READY;
1610 SvRV_set (coro_current, next_sv);
1611
1612 LOCK;
1613 free_coro_mortal (aTHX);
1614 coro_mortal = prev_sv;
1615 UNLOCK;
1616}
1617
1618static void
1619prepare_cede (pTHX_ struct transfer_args *ta)
1620{
1621 api_ready (coro_current);
1622 prepare_schedule (aTHX_ ta);
1623}
1624
1625static int
1626prepare_cede_notself (pTHX_ struct transfer_args *ta)
1627{
1628 if (coro_nready)
1629 {
1630 SV *prev = SvRV (coro_current);
1631 prepare_schedule (aTHX_ ta);
1632 api_ready (prev);
1633 return 1;
1634 }
1635 else
1636 return 0;
882} 1637}
883 1638
884static void 1639static void
885api_schedule (void) 1640api_schedule (void)
886{ 1641{
887 SV *prev, *next; 1642 dTHX;
1643 struct transfer_args ta;
888 1644
889 prev = SvRV (GvSV (coro_current)); 1645 prepare_schedule (aTHX_ &ta);
890 next = coro_deq (PRIO_MIN); 1646 TRANSFER (ta, 1);
1647}
891 1648
892 if (!next) 1649static int
893 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1650api_cede (void)
1651{
1652 dTHX;
1653 struct transfer_args ta;
894 1654
895 /* free this only after the transfer */ 1655 prepare_cede (aTHX_ &ta);
896 coro_mortal = prev;
897 SV_CORO (prev, "Coro::schedule");
898 1656
899 SvRV (GvSV (coro_current)) = next; 1657 if (expect_true (ta.prev != ta.next))
1658 {
1659 TRANSFER (ta, 1);
1660 return 1;
1661 }
1662 else
1663 return 0;
1664}
900 1665
901 SV_CORO (next, "Coro::schedule"); 1666static int
1667api_cede_notself (void)
1668{
1669 dTHX;
1670 struct transfer_args ta;
902 1671
903 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1672 if (prepare_cede_notself (aTHX_ &ta))
904 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1673 {
1674 TRANSFER (ta, 1);
1675 return 1;
1676 }
1677 else
1678 return 0;
905} 1679}
906 1680
907static void 1681static void
908api_cede (void) 1682api_trace (SV *coro_sv, int flags)
909{ 1683{
910 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1684 dTHX;
1685 struct coro *coro = SvSTATE (coro_sv);
911 1686
1687 if (flags & CC_TRACE)
1688 {
1689 if (!coro->cctx)
1690 coro->cctx = cctx_new_run ();
1691 else if (!(coro->cctx->flags & CC_TRACE))
1692 croak ("cannot enable tracing on coroutine with custom stack");
1693
1694 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1695 }
1696 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1697 {
1698 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1699
1700 if (coro->flags & CF_RUNNING)
1701 PL_runops = RUNOPS_DEFAULT;
1702 else
1703 coro->slot->runops = RUNOPS_DEFAULT;
1704 }
1705}
1706
1707#if 0
1708static int
1709coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1710{
1711 AV *padlist;
1712 AV *av = (AV *)mg->mg_obj;
1713
1714 abort ();
1715
1716 return 0;
1717}
1718
1719static MGVTBL coro_gensub_vtbl = {
1720 0, 0, 0, 0,
1721 coro_gensub_free
1722};
1723#endif
1724
1725/*****************************************************************************/
1726/* PerlIO::cede */
1727
1728typedef struct
1729{
1730 PerlIOBuf base;
1731 NV next, every;
1732} PerlIOCede;
1733
1734static IV
1735PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1736{
1737 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1738
1739 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1740 self->next = nvtime () + self->every;
1741
1742 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1743}
1744
1745static SV *
1746PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1747{
1748 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1749
1750 return newSVnv (self->every);
1751}
1752
1753static IV
1754PerlIOCede_flush (pTHX_ PerlIO *f)
1755{
1756 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1757 double now = nvtime ();
1758
1759 if (now >= self->next)
1760 {
912 api_schedule (); 1761 api_cede ();
913} 1762 self->next = now + self->every;
1763 }
914 1764
1765 return PerlIOBuf_flush (aTHX_ f);
1766}
1767
1768static PerlIO_funcs PerlIO_cede =
1769{
1770 sizeof(PerlIO_funcs),
1771 "cede",
1772 sizeof(PerlIOCede),
1773 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1774 PerlIOCede_pushed,
1775 PerlIOBuf_popped,
1776 PerlIOBuf_open,
1777 PerlIOBase_binmode,
1778 PerlIOCede_getarg,
1779 PerlIOBase_fileno,
1780 PerlIOBuf_dup,
1781 PerlIOBuf_read,
1782 PerlIOBuf_unread,
1783 PerlIOBuf_write,
1784 PerlIOBuf_seek,
1785 PerlIOBuf_tell,
1786 PerlIOBuf_close,
1787 PerlIOCede_flush,
1788 PerlIOBuf_fill,
1789 PerlIOBase_eof,
1790 PerlIOBase_error,
1791 PerlIOBase_clearerr,
1792 PerlIOBase_setlinebuf,
1793 PerlIOBuf_get_base,
1794 PerlIOBuf_bufsiz,
1795 PerlIOBuf_get_ptr,
1796 PerlIOBuf_get_cnt,
1797 PerlIOBuf_set_ptrcnt,
1798};
1799
1800
915MODULE = Coro::State PACKAGE = Coro::State 1801MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916 1802
917PROTOTYPES: ENABLE 1803PROTOTYPES: DISABLE
918 1804
919BOOT: 1805BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 1806{
921 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1807#ifdef USE_ITHREADS
922 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1808 MUTEX_INIT (&coro_lock);
1809# if CORO_PTHREAD
1810 coro_thx = PERL_GET_CONTEXT;
1811# endif
1812#endif
1813 BOOT_PAGESIZE;
1814
1815 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1816 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1817
1818 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1819 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1820 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1821
1822 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1823 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1824 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1825
923 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1826 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924 1827
925 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1828 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
926 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1829 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
927 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1830 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
928 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1831 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
929
930 if (!padlist_cache)
931 padlist_cache = newHV ();
932 1832
933 main_mainstack = PL_mainstack; 1833 main_mainstack = PL_mainstack;
1834 main_top_env = PL_top_env;
934 1835
1836 while (main_top_env->je_prev)
1837 main_top_env = main_top_env->je_prev;
1838
935 coroapi.ver = CORO_API_VERSION; 1839 coroapi.ver = CORO_API_VERSION;
1840 coroapi.rev = CORO_API_REVISION;
936 coroapi.transfer = api_transfer; 1841 coroapi.transfer = api_transfer;
937}
938 1842
939Coro::State 1843 {
940_newprocess(args) 1844 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
941 SV * args 1845
942 PROTOTYPE: $ 1846 if (!svp) croak ("Time::HiRes is required");
1847 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1848
1849 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1850 }
1851
1852 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1853}
1854
1855SV *
1856new (char *klass, ...)
943 CODE: 1857 CODE:
944 Coro__State coro; 1858{
1859 struct coro *coro;
1860 MAGIC *mg;
1861 HV *hv;
1862 int i;
945 1863
946 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
947 croak ("Coro::State::_newprocess expects an arrayref");
948
949 Newz (0, coro, 1, struct coro); 1864 Newz (0, coro, 1, struct coro);
1865 coro->args = newAV ();
1866 coro->flags = CF_NEW;
950 1867
951 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1868 if (coro_first) coro_first->prev = coro;
952 coro->mainstack = 0; /* actual work is done inside transfer */ 1869 coro->next = coro_first;
953 coro->stack = 0; 1870 coro_first = coro;
954 1871
955 /* same as JMPENV_BOOTSTRAP */ 1872 coro->hv = hv = newHV ();
956 /* we might be able to recycle start_env, but safe is safe */ 1873 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
957 //Zero(&coro->start_env, 1, JMPENV); 1874 mg->mg_flags |= MGf_DUP;
958 coro->start_env.je_ret = -1; 1875 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
959 coro->start_env.je_mustcatch = TRUE;
960 1876
961 RETVAL = coro; 1877 av_extend (coro->args, items - 1);
1878 for (i = 1; i < items; i++)
1879 av_push (coro->args, newSVsv (ST (i)));
1880}
962 OUTPUT: 1881 OUTPUT:
963 RETVAL 1882 RETVAL
964 1883
1884# these not obviously related functions are all rolled into the same xs
1885# function to increase chances that they all will call transfer with the same
1886# stack offset
965void 1887void
966transfer(prev, next, flags) 1888_set_stacklevel (...)
967 SV *prev 1889 ALIAS:
968 SV *next 1890 Coro::State::transfer = 1
969 int flags 1891 Coro::schedule = 2
970 PROTOTYPE: @ 1892 Coro::cede = 3
1893 Coro::cede_notself = 4
971 CODE: 1894 CODE:
1895{
1896 struct transfer_args ta;
1897
972 PUTBACK; 1898 PUTBACK;
973 SV_CORO (next, "Coro::transfer"); 1899 switch (ix)
974 SV_CORO (prev, "Coro::transfer"); 1900 {
975 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1901 case 0:
1902 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1903 ta.next = 0;
1904 break;
1905
1906 case 1:
1907 if (items != 2)
1908 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1909
1910 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1911 break;
1912
1913 case 2:
1914 prepare_schedule (aTHX_ &ta);
1915 break;
1916
1917 case 3:
1918 prepare_cede (aTHX_ &ta);
1919 break;
1920
1921 case 4:
1922 if (!prepare_cede_notself (aTHX_ &ta))
1923 XSRETURN_EMPTY;
1924
1925 break;
1926 }
976 SPAGAIN; 1927 SPAGAIN;
977 1928
1929 BARRIER;
1930 PUTBACK;
1931 TRANSFER (ta, 0);
1932 SPAGAIN; /* might be the sp of a different coroutine now */
1933 /* be extra careful not to ever do anything after TRANSFER */
1934}
1935
1936bool
1937_destroy (SV *coro_sv)
1938 CODE:
1939 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1940 OUTPUT:
1941 RETVAL
1942
978void 1943void
979DESTROY(coro)
980 Coro::State coro
981 CODE:
982
983 if (coro->mainstack && coro->mainstack != main_mainstack)
984 {
985 struct coro temp;
986
987 PUTBACK;
988 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
989 LOAD(aTHX_ coro);
990 SPAGAIN;
991
992 destroy_stacks (aTHX);
993
994 LOAD((&temp)); /* this will get rid of defsv etc.. */
995 SPAGAIN;
996
997 coro->mainstack = 0;
998 }
999
1000 deallocate_stack (coro);
1001 SvREFCNT_dec (coro->args);
1002 Safefree (coro);
1003
1004void
1005_exit(code) 1944_exit (int code)
1006 int code
1007 PROTOTYPE: $ 1945 PROTOTYPE: $
1008 CODE: 1946 CODE:
1009 _exit (code); 1947 _exit (code);
1010 1948
1011MODULE = Coro::State PACKAGE = Coro::Cont 1949int
1950cctx_stacksize (int new_stacksize = 0)
1951 CODE:
1952 RETVAL = cctx_stacksize;
1953 if (new_stacksize)
1954 {
1955 cctx_stacksize = new_stacksize;
1956 ++cctx_gen;
1957 }
1958 OUTPUT:
1959 RETVAL
1012 1960
1013# this is slightly dirty (should expose a c-level api) 1961int
1962cctx_max_idle (int max_idle = 0)
1963 CODE:
1964 RETVAL = cctx_max_idle;
1965 if (max_idle > 1)
1966 cctx_max_idle = max_idle;
1967 OUTPUT:
1968 RETVAL
1969
1970int
1971cctx_count ()
1972 CODE:
1973 RETVAL = cctx_count;
1974 OUTPUT:
1975 RETVAL
1976
1977int
1978cctx_idle ()
1979 CODE:
1980 RETVAL = cctx_idle;
1981 OUTPUT:
1982 RETVAL
1014 1983
1015void 1984void
1016yield(...) 1985list ()
1017 PROTOTYPE: @ 1986 PPCODE:
1987{
1988 struct coro *coro;
1989 for (coro = coro_first; coro; coro = coro->next)
1990 if (coro->hv)
1991 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1992}
1993
1994void
1995call (Coro::State coro, SV *coderef)
1996 ALIAS:
1997 eval = 1
1998 CODE:
1999{
2000 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2001 {
2002 struct coro temp;
2003
2004 if (!(coro->flags & CF_RUNNING))
2005 {
2006 PUTBACK;
2007 save_perl (aTHX_ &temp);
2008 load_perl (aTHX_ coro);
2009 }
2010
2011 {
2012 dSP;
2013 ENTER;
2014 SAVETMPS;
2015 PUTBACK;
2016 PUSHSTACK;
2017 PUSHMARK (SP);
2018
2019 if (ix)
2020 eval_sv (coderef, 0);
2021 else
2022 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2023
2024 POPSTACK;
2025 SPAGAIN;
2026 FREETMPS;
2027 LEAVE;
2028 PUTBACK;
2029 }
2030
2031 if (!(coro->flags & CF_RUNNING))
2032 {
2033 save_perl (aTHX_ coro);
2034 load_perl (aTHX_ &temp);
2035 SPAGAIN;
2036 }
2037 }
2038}
2039
2040SV *
2041is_ready (Coro::State coro)
2042 PROTOTYPE: $
2043 ALIAS:
2044 is_ready = CF_READY
2045 is_running = CF_RUNNING
2046 is_new = CF_NEW
2047 is_destroyed = CF_DESTROYED
2048 CODE:
2049 RETVAL = boolSV (coro->flags & ix);
2050 OUTPUT:
2051 RETVAL
2052
2053void
2054api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2055
2056SV *
2057has_cctx (Coro::State coro)
2058 PROTOTYPE: $
2059 CODE:
2060 RETVAL = boolSV (!!coro->cctx);
2061 OUTPUT:
2062 RETVAL
2063
2064int
2065is_traced (Coro::State coro)
2066 PROTOTYPE: $
2067 CODE:
2068 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2069 OUTPUT:
2070 RETVAL
2071
2072UV
2073rss (Coro::State coro)
2074 PROTOTYPE: $
2075 ALIAS:
2076 usecount = 1
1018 CODE: 2077 CODE:
1019 static SV *returnstk; 2078 switch (ix)
1020 SV *sv; 2079 {
1021 AV *defav = GvAV (PL_defgv); 2080 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1022 struct coro *prev, *next; 2081 case 1: RETVAL = coro->usecount; break;
2082 }
2083 OUTPUT:
2084 RETVAL
1023 2085
1024 if (!returnstk) 2086void
1025 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE)); 2087force_cctx ()
2088 CODE:
2089 struct coro *coro = SvSTATE (coro_current);
2090 coro->cctx->idle_sp = 0;
1026 2091
1027 /* set up @_ -- ugly */ 2092void
1028 av_clear (defav); 2093swap_defsv (Coro::State self)
1029 av_fill (defav, items - 1); 2094 PROTOTYPE: $
1030 while (items--) 2095 ALIAS:
1031 av_store (defav, items, SvREFCNT_inc (ST(items))); 2096 swap_defav = 1
2097 CODE:
2098 if (!self->slot)
2099 croak ("cannot swap state with coroutine that has no saved state");
2100 else
2101 {
2102 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2103 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1032 2104
1033 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2105 SV *tmp = *src; *src = *dst; *dst = tmp;
1034 sv = av_pop ((AV *)SvRV (returnstk)); 2106 }
1035 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1036 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1037 SvREFCNT_dec (sv);
1038
1039 transfer(aTHX_ prev, next, 0);
1040 2107
1041MODULE = Coro::State PACKAGE = Coro 2108MODULE = Coro::State PACKAGE = Coro
1042 2109
1043# this is slightly dirty (should expose a c-level api)
1044
1045BOOT: 2110BOOT:
1046{ 2111{
1047 int i; 2112 int i;
2113
2114 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2115 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2116 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2117
2118 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2119 SvREADONLY_on (coro_current);
2120
1048 HV *stash = gv_stashpv ("Coro", TRUE); 2121 coro_stash = gv_stashpv ("Coro", TRUE);
1049 2122
1050 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2123 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2124 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2125 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2126 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2127 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2128 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059 2129
1060 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2130 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061 coro_ready[i] = newAV (); 2131 coro_ready[i] = newAV ();
1062 2132
1063 { 2133 {
1064 SV *sv = perl_get_sv("Coro::API", 1); 2134 SV *sv = perl_get_sv ("Coro::API", TRUE);
2135 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1065 2136
1066 coroapi.schedule = api_schedule; 2137 coroapi.schedule = api_schedule;
1067 coroapi.cede = api_cede; 2138 coroapi.cede = api_cede;
2139 coroapi.cede_notself = api_cede_notself;
1068 coroapi.ready = api_ready; 2140 coroapi.ready = api_ready;
2141 coroapi.is_ready = api_is_ready;
1069 coroapi.nready = &coro_nready; 2142 coroapi.nready = &coro_nready;
1070 coroapi.current = coro_current; 2143 coroapi.current = coro_current;
1071 2144
1072 GCoroAPI = &coroapi; 2145 GCoroAPI = &coroapi;
1073 sv_setiv(sv, (IV)&coroapi); 2146 sv_setiv (sv, (IV)&coroapi);
1074 SvREADONLY_on(sv); 2147 SvREADONLY_on (sv);
1075 } 2148 }
1076} 2149}
1077 2150
1078#if !PERL_MICRO
1079
1080void 2151void
1081ready(self) 2152_set_current (SV *current)
1082 SV * self
1083 PROTOTYPE: $ 2153 PROTOTYPE: $
1084 CODE: 2154 CODE:
1085 api_ready (self); 2155 SvREFCNT_dec (SvRV (coro_current));
2156 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1086 2157
1087#endif 2158void
2159_set_readyhook (SV *hook)
2160 PROTOTYPE: $
2161 CODE:
2162 LOCK;
2163 SvREFCNT_dec (coro_readyhook);
2164 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2165 UNLOCK;
1088 2166
1089int 2167int
2168prio (Coro::State coro, int newprio = 0)
2169 ALIAS:
2170 nice = 1
2171 CODE:
2172{
2173 RETVAL = coro->prio;
2174
2175 if (items > 1)
2176 {
2177 if (ix)
2178 newprio = coro->prio - newprio;
2179
2180 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2181 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2182
2183 coro->prio = newprio;
2184 }
2185}
2186 OUTPUT:
2187 RETVAL
2188
2189SV *
2190ready (SV *self)
2191 PROTOTYPE: $
2192 CODE:
2193 RETVAL = boolSV (api_ready (self));
2194 OUTPUT:
2195 RETVAL
2196
2197int
1090nready(...) 2198nready (...)
1091 PROTOTYPE: 2199 PROTOTYPE:
1092 CODE: 2200 CODE:
1093 RETVAL = coro_nready; 2201 RETVAL = coro_nready;
1094 OUTPUT: 2202 OUTPUT:
1095 RETVAL 2203 RETVAL
1096 2204
1097void 2205void
1098schedule(...) 2206throw (Coro::State self, SV *throw = &PL_sv_undef)
1099 PROTOTYPE: 2207 PROTOTYPE: $;$
2208 CODE:
2209 SvREFCNT_dec (self->throw);
2210 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2211
2212# for async_pool speedup
2213void
2214_pool_1 (SV *cb)
1100 CODE: 2215 CODE:
1101 api_schedule (); 2216{
2217 struct coro *coro = SvSTATE (coro_current);
2218 HV *hv = (HV *)SvRV (coro_current);
2219 AV *defav = GvAV (PL_defgv);
2220 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2221 AV *invoke_av;
2222 int i, len;
2223
2224 if (!invoke)
2225 {
2226 SV *old = PL_diehook;
2227 PL_diehook = 0;
2228 SvREFCNT_dec (old);
2229 croak ("\3async_pool terminate\2\n");
2230 }
2231
2232 SvREFCNT_dec (coro->saved_deffh);
2233 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2234
2235 hv_store (hv, "desc", sizeof ("desc") - 1,
2236 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2237
2238 invoke_av = (AV *)SvRV (invoke);
2239 len = av_len (invoke_av);
2240
2241 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2242
2243 if (len > 0)
2244 {
2245 av_fill (defav, len - 1);
2246 for (i = 0; i < len; ++i)
2247 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2248 }
2249
2250 SvREFCNT_dec (invoke);
2251}
1102 2252
1103void 2253void
1104cede(...) 2254_pool_2 (SV *cb)
1105 PROTOTYPE:
1106 CODE: 2255 CODE:
2256{
2257 struct coro *coro = SvSTATE (coro_current);
2258
2259 sv_setsv (cb, &PL_sv_undef);
2260
2261 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2262 coro->saved_deffh = 0;
2263
2264 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2265 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2266 {
2267 SV *old = PL_diehook;
2268 PL_diehook = 0;
2269 SvREFCNT_dec (old);
2270 croak ("\3async_pool terminate\2\n");
2271 }
2272
2273 av_clear (GvAV (PL_defgv));
2274 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2275 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2276
2277 coro->prio = 0;
2278
2279 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2280 api_trace (coro_current, 0);
2281
2282 av_push (av_async_pool, newSVsv (coro_current));
2283}
2284
2285#if 0
2286
2287void
2288_generator_call (...)
2289 PROTOTYPE: @
2290 PPCODE:
2291 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2292 xxxx
2293 abort ();
2294
2295SV *
2296gensub (SV *sub, ...)
2297 PROTOTYPE: &;@
2298 CODE:
2299{
2300 struct coro *coro;
2301 MAGIC *mg;
2302 CV *xcv;
2303 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2304 int i;
2305
2306 CvGV (ncv) = CvGV (cv);
2307 CvFILE (ncv) = CvFILE (cv);
2308
2309 Newz (0, coro, 1, struct coro);
2310 coro->args = newAV ();
2311 coro->flags = CF_NEW;
2312
2313 av_extend (coro->args, items - 1);
2314 for (i = 1; i < items; i++)
2315 av_push (coro->args, newSVsv (ST (i)));
2316
2317 CvISXSUB_on (ncv);
2318 CvXSUBANY (ncv).any_ptr = (void *)coro;
2319
2320 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2321
2322 CvXSUB (ncv) = CvXSUB (xcv);
2323 CvANON_on (ncv);
2324
2325 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2326 RETVAL = newRV_noinc ((SV *)ncv);
2327}
2328 OUTPUT:
2329 RETVAL
2330
2331#endif
2332
2333
2334MODULE = Coro::State PACKAGE = Coro::AIO
2335
2336void
2337_get_state (SV *self)
2338 PPCODE:
2339{
2340 AV *defav = GvAV (PL_defgv);
2341 AV *av = newAV ();
2342 int i;
2343 SV *data_sv = newSV (sizeof (struct io_state));
2344 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2345 SvCUR_set (data_sv, sizeof (struct io_state));
2346 SvPOK_only (data_sv);
2347
2348 data->errorno = errno;
2349 data->laststype = PL_laststype;
2350 data->laststatval = PL_laststatval;
2351 data->statcache = PL_statcache;
2352
2353 av_extend (av, AvFILLp (defav) + 1 + 1);
2354
2355 for (i = 0; i <= AvFILLp (defav); ++i)
2356 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2357
2358 av_push (av, data_sv);
2359
2360 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2361
2362 api_ready (self);
2363}
2364
2365void
2366_set_state (SV *state)
2367 PROTOTYPE: $
2368 PPCODE:
2369{
2370 AV *av = (AV *)SvRV (state);
2371 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2372 int i;
2373
2374 errno = data->errorno;
2375 PL_laststype = data->laststype;
2376 PL_laststatval = data->laststatval;
2377 PL_statcache = data->statcache;
2378
2379 EXTEND (SP, AvFILLp (av));
2380 for (i = 0; i < AvFILLp (av); ++i)
2381 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2382}
2383
2384
2385MODULE = Coro::State PACKAGE = Coro::AnyEvent
2386
2387BOOT:
2388 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2389
2390SV *
2391_schedule (...)
2392 PROTOTYPE: @
2393 CODE:
2394{
2395 static int incede;
2396
1107 api_cede (); 2397 api_cede_notself ();
1108 2398
2399 ++incede;
2400 while (coro_nready >= incede && api_cede ())
2401 ;
2402
2403 sv_setsv (sv_activity, &PL_sv_undef);
2404 if (coro_nready >= incede)
2405 {
2406 PUSHMARK (SP);
2407 PUTBACK;
2408 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2409 SPAGAIN;
2410 }
2411
2412 --incede;
2413}
2414
2415
2416MODULE = Coro::State PACKAGE = PerlIO::cede
2417
2418BOOT:
2419 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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