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Comparing Coro/Coro/State.xs (file contents):
Revision 1.70 by root, Mon Dec 26 19:26:52 2005 UTC vs.
Revision 1.263 by root, Wed Nov 12 04:49:06 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 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#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
33#include <signal.h> 84#ifndef CxHASARGS
34 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
35#ifdef HAVE_MMAP
36# include <unistd.h>
37# include <sys/mman.h>
38# ifndef MAP_ANONYMOUS
39# ifdef MAP_ANON
40# define MAP_ANONYMOUS MAP_ANON
41# else
42# undef HAVE_MMAP
43# endif 86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#define dSTACKLEVEL volatile char stacklevel
122#define STACKLEVEL ((void *)&stacklevel)
123
124#define IN_DESTRUCT (PL_main_cv == Nullcv)
125
126#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x)
128# define BARRIER __asm__ __volatile__ ("" : : : "memory")
129# define expect(expr,value) __builtin_expect ((expr),(value))
130# define INLINE static inline
131#else
132# define attribute(x)
133# define BARRIER
134# define expect(expr,value) (expr)
135# define INLINE static
136#endif
137
138#define expect_false(expr) expect ((expr) != 0, 0)
139#define expect_true(expr) expect ((expr) != 0, 1)
140
141#define NOINLINE attribute ((noinline))
142
143#include "CoroAPI.h"
144
145#ifdef USE_ITHREADS
146
147static perl_mutex coro_lock;
148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
150# if CORO_PTHREAD
151static void *coro_thx;
44# endif 152# endif
45#endif
46 153
47#define SUB_INIT "Coro::State::initialize"
48#define UCORO_STATE "_coro_state"
49
50/* The next macro should declare a variable stacklevel that contains and approximation
51 * to the current C stack pointer. Its property is that it changes with each call
52 * and should be unique. */
53#define dSTACKLEVEL void *stacklevel = &stacklevel
54
55#define IN_DESTRUCT (PL_main_cv == Nullcv)
56
57#define labs(l) ((l) >= 0 ? (l) : -(l))
58
59#include "CoroAPI.h"
60
61#ifdef USE_ITHREADS
62static perl_mutex coro_mutex;
63# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
65#else 154#else
155
66# define LOCK (void)0 156# define LOCK (void)0
67# define UNLOCK (void)0 157# define UNLOCK (void)0
68#endif
69 158
159#endif
160
161# undef LOCK
162# define LOCK (void)0
163# undef UNLOCK
164# define UNLOCK (void)0
165
166/* helper storage struct for Coro::AIO */
167struct io_state
168{
169 AV *res;
170 int errorno;
171 I32 laststype; /* U16 in 5.10.0 */
172 int laststatval;
173 Stat_t statcache;
174};
175
176static double (*nvtime)(); /* so why doesn't it take void? */
177
178static U32 cctx_gen;
179static size_t cctx_stacksize = CORO_STACKSIZE;
70static struct CoroAPI coroapi; 180static struct CoroAPI coroapi;
71static AV *main_mainstack; /* used to differentiate between $main and others */ 181static AV *main_mainstack; /* used to differentiate between $main and others */
182static JMPENV *main_top_env;
72static HV *coro_state_stash; 183static HV *coro_state_stash, *coro_stash;
73static SV *ucoro_state_sv;
74static U32 ucoro_state_hash;
75static SV *coro_mortal; /* will be freed after next transfer */ 184static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
185static volatile struct coro *transfer_next;
76 186
77/* this is actually not only the c stack but also c registers etc... */ 187struct transfer_args
188{
189 struct coro *prev, *next;
190};
191
192static GV *irsgv; /* $/ */
193static GV *stdoutgv; /* *STDOUT */
194static SV *rv_diehook;
195static SV *rv_warnhook;
196static HV *hv_sig; /* %SIG */
197
198/* async_pool helper stuff */
199static SV *sv_pool_rss;
200static SV *sv_pool_size;
201static AV *av_async_pool;
202
203/* Coro::AnyEvent */
204static SV *sv_activity;
205
206static struct coro_cctx *cctx_first;
207static int cctx_count, cctx_idle;
208
209enum {
210 CC_MAPPED = 0x01,
211 CC_NOREUSE = 0x02, /* throw this away after tracing */
212 CC_TRACE = 0x04,
213 CC_TRACE_SUB = 0x08, /* trace sub calls */
214 CC_TRACE_LINE = 0x10, /* trace each statement */
215 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
216};
217
218/* this is a structure representing a c-level coroutine */
219typedef struct coro_cctx {
220 struct coro_cctx *next;
221
222 /* the stack */
223 void *sptr;
224 size_t ssize;
225
226 /* cpu state */
227 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
228 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
229 JMPENV *top_env;
230 coro_context cctx;
231
232 U32 gen;
233#if CORO_USE_VALGRIND
234 int valgrind_id;
235#endif
236 unsigned char flags;
237} coro_cctx;
238
239enum {
240 CF_RUNNING = 0x0001, /* coroutine is running */
241 CF_READY = 0x0002, /* coroutine is ready */
242 CF_NEW = 0x0004, /* has never been switched to */
243 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
244};
245
246/* the structure where most of the perl state is stored, overlaid on the cxstack */
78typedef struct { 247typedef struct {
79 int refcnt; /* pointer reference counter */ 248 SV *defsv;
80 int usecnt; /* shared by how many coroutines */ 249 AV *defav;
81 int gencnt; /* generation counter */ 250 SV *errsv;
251 SV *irsgv;
252#define VAR(name,type) type name;
253# include "state.h"
254#undef VAR
255} perl_slots;
82 256
83 coro_context cctx; 257#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
84 258
85 void *sptr; 259/* this is a structure representing a perl-level coroutine */
86 long ssize; /* positive == mmap, otherwise malloc */
87} coro_stack;
88
89struct coro { 260struct coro {
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 261 /* the c coroutine allocated to this perl coroutine, if any */
91 JMPENV start_env; 262 coro_cctx *cctx;
92 263
93 /* the optional C context */ 264 /* process data */
94 coro_stack *stack;
95 void *cursp;
96 int gencnt;
97
98 /* optionally saved, might be zero */
99 AV *defav;
100 SV *defsv;
101 SV *errsv;
102
103 /* saved global state not related to stacks */
104 U8 dowarn;
105 I32 in_eval;
106
107 /* the stacks and related info (callchain etc..) */
108 PERL_SI *curstackinfo;
109 AV *curstack;
110 AV *mainstack; 265 AV *mainstack;
111 SV **stack_sp; 266 perl_slots *slot; /* basically the saved sp */
112 OP *op;
113 SV **curpad;
114 AV *comppad;
115 CV *compcv;
116 SV **stack_base;
117 SV **stack_max;
118 SV **tmps_stack;
119 I32 tmps_floor;
120 I32 tmps_ix;
121 I32 tmps_max;
122 I32 *markstack;
123 I32 *markstack_ptr;
124 I32 *markstack_max;
125 I32 *scopestack;
126 I32 scopestack_ix;
127 I32 scopestack_max;
128 ANY *savestack;
129 I32 savestack_ix;
130 I32 savestack_max;
131 OP **retstack;
132 I32 retstack_ix;
133 I32 retstack_max;
134 PMOP *curpm;
135 COP *curcop;
136 JMPENV *top_env;
137 267
138 /* data associated with this coroutine (initial args) */ 268 AV *args; /* data associated with this coroutine (initial args) */
139 AV *args; 269 int refcnt; /* coroutines are refcounted, yes */
270 int flags; /* CF_ flags */
271 HV *hv; /* the perl hash associated with this coro, if any */
272
273 /* statistics */
274 int usecount; /* number of transfers to this coro */
275
276 /* coro process data */
277 int prio;
278 SV *throw; /* exception to be thrown */
279
280 /* async_pool */
281 SV *saved_deffh;
282
283 /* linked list */
284 struct coro *next, *prev;
140}; 285};
141 286
142typedef struct coro *Coro__State; 287typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 288typedef struct coro *Coro__State_or_hashref;
144 289
145/* mostly copied from op.c:cv_clone2 */ 290/** Coro ********************************************************************/
146STATIC AV * 291
147clone_padlist (pTHX_ AV *protopadlist) 292#define PRIO_MAX 3
293#define PRIO_HIGH 1
294#define PRIO_NORMAL 0
295#define PRIO_LOW -1
296#define PRIO_IDLE -3
297#define PRIO_MIN -4
298
299/* for Coro.pm */
300static SV *coro_current;
301static SV *coro_readyhook;
302static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
303static int coro_nready;
304static struct coro *coro_first;
305
306/** lowlevel stuff **********************************************************/
307
308static SV *
309coro_get_sv (pTHX_ const char *name, int create)
148{ 310{
149 AV *av; 311#if PERL_VERSION_ATLEAST (5,10,0)
150 I32 ix; 312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 313 get_sv (name, create);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 314#endif
153 SV **pname = AvARRAY (protopad_name); 315 return get_sv (name, create);
154 SV **ppad = AvARRAY (protopad); 316}
155 I32 fname = AvFILLp (protopad_name); 317
156 I32 fpad = AvFILLp (protopad); 318static AV *
319coro_get_av (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_av (name, create);
324#endif
325 return get_av (name, create);
326}
327
328static HV *
329coro_get_hv (pTHX_ const char *name, int create)
330{
331#if PERL_VERSION_ATLEAST (5,10,0)
332 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
333 get_hv (name, create);
334#endif
335 return get_hv (name, create);
336}
337
338static AV *
339coro_clone_padlist (pTHX_ CV *cv)
340{
341 AV *padlist = CvPADLIST (cv);
157 AV *newpadlist, *newpad_name, *newpad; 342 AV *newpadlist, *newpad;
158 SV **npad;
159
160 newpad_name = newAV ();
161 for (ix = fname; ix >= 0; ix--)
162 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164 newpad = newAV ();
165 av_fill (newpad, AvFILLp (protopad));
166 npad = AvARRAY (newpad);
167 343
168 newpadlist = newAV (); 344 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 345 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 346#if PERL_VERSION_ATLEAST (5,10,0)
347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
348#else
349 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
350#endif
351 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
352 --AvFILLp (padlist);
353
354 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
171 av_store (newpadlist, 1, (SV *) newpad); 355 av_store (newpadlist, 1, (SV *)newpad);
172
173 av = newAV (); /* will be @_ */
174 av_extend (av, 0);
175 av_store (newpad, 0, (SV *) av);
176 AvFLAGS (av) = AVf_REIFY;
177
178 for (ix = fpad; ix > 0; ix--)
179 {
180 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182 if (namesv && namesv != &PL_sv_undef)
183 {
184 char *name = SvPVX (namesv); /* XXX */
185
186 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187 { /* lexical from outside? */
188 npad[ix] = SvREFCNT_inc (ppad[ix]);
189 }
190 else
191 { /* our own lexical */
192 SV *sv;
193 if (*name == '&')
194 sv = SvREFCNT_inc (ppad[ix]);
195 else if (*name == '@')
196 sv = (SV *) newAV ();
197 else if (*name == '%')
198 sv = (SV *) newHV ();
199 else
200 sv = NEWSV (0, 0);
201
202#ifdef SvPADBUSY
203 if (!SvPADBUSY (sv))
204#endif
205 SvPADMY_on (sv);
206
207 npad[ix] = sv;
208 }
209 }
210 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211 {
212 npad[ix] = SvREFCNT_inc (ppad[ix]);
213 }
214 else
215 {
216 SV *sv = NEWSV (0, 0);
217 SvPADTMP_on (sv);
218 npad[ix] = sv;
219 }
220 }
221
222#if 0 /* return -ENOTUNDERSTOOD */
223 /* Now that vars are all in place, clone nested closures. */
224
225 for (ix = fpad; ix > 0; ix--) {
226 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227 if (namesv
228 && namesv != &PL_sv_undef
229 && !(SvFLAGS(namesv) & SVf_FAKE)
230 && *SvPVX(namesv) == '&'
231 && CvCLONE(ppad[ix]))
232 {
233 CV *kid = cv_clone((CV*)ppad[ix]);
234 SvREFCNT_dec(ppad[ix]);
235 CvCLONE_on(kid);
236 SvPADMY_on(kid);
237 npad[ix] = (SV*)kid;
238 }
239 }
240#endif
241 356
242 return newpadlist; 357 return newpadlist;
243} 358}
244 359
245STATIC void 360static void
246free_padlist (pTHX_ AV *padlist) 361free_padlist (pTHX_ AV *padlist)
247{ 362{
248 /* may be during global destruction */ 363 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 364 if (SvREFCNT (padlist))
250 { 365 {
… …
264 379
265 SvREFCNT_dec ((SV*)padlist); 380 SvREFCNT_dec ((SV*)padlist);
266 } 381 }
267} 382}
268 383
269STATIC int 384static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 385coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 386{
272 AV *padlist; 387 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 388 AV *av = (AV *)mg->mg_obj;
274 389
275 /* casting is fun. */ 390 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 391 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 392 free_padlist (aTHX_ padlist);
278 393
279 SvREFCNT_dec (av); 394 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280}
281 395
396 return 0;
397}
398
282#define PERL_MAGIC_coro PERL_MAGIC_ext 399#define CORO_MAGIC_type_cv PERL_MAGIC_ext
400#define CORO_MAGIC_type_state PERL_MAGIC_ext
283 401
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 402static MGVTBL coro_cv_vtbl = {
403 0, 0, 0, 0,
404 coro_cv_free
405};
406
407#define CORO_MAGIC(sv, type) \
408 SvMAGIC (sv) \
409 ? SvMAGIC (sv)->mg_type == type \
410 ? SvMAGIC (sv) \
411 : mg_find (sv, type) \
412 : 0
413
414#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
415#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
416
417INLINE struct coro *
418SvSTATE_ (pTHX_ SV *coro)
419{
420 HV *stash;
421 MAGIC *mg;
422
423 if (SvROK (coro))
424 coro = SvRV (coro);
425
426 if (expect_false (SvTYPE (coro) != SVt_PVHV))
427 croak ("Coro::State object required");
428
429 stash = SvSTASH (coro);
430 if (expect_false (stash != coro_stash && stash != coro_state_stash))
431 {
432 /* very slow, but rare, check */
433 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
434 croak ("Coro::State object required");
435 }
436
437 mg = CORO_MAGIC_state (coro);
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
285 442
286/* the next two functions merely cache the padlists */ 443/* the next two functions merely cache the padlists */
287STATIC void 444static void
288get_padlist (pTHX_ CV *cv) 445get_padlist (pTHX_ CV *cv)
289{ 446{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 447 MAGIC *mg = CORO_MAGIC_cv (cv);
448 AV *av;
291 449
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 450 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 451 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 452 else
453 {
454#if CORO_PREFER_PERL_FUNCTIONS
455 /* this is probably cleaner? but also slower! */
456 /* in practise, it seems to be less stable */
457 CV *cp = Perl_cv_clone (cv);
458 CvPADLIST (cv) = CvPADLIST (cp);
459 CvPADLIST (cp) = 0;
460 SvREFCNT_dec (cp);
461#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
463#endif
464 }
296} 465}
297 466
298STATIC void 467static void
299put_padlist (pTHX_ CV *cv) 468put_padlist (pTHX_ CV *cv)
300{ 469{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 470 MAGIC *mg = CORO_MAGIC_cv (cv);
471 AV *av;
302 472
303 if (!mg) 473 if (expect_false (!mg))
304 { 474 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
305 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307 mg->mg_virtual = &vtbl_coro;
308 mg->mg_obj = (SV *)newAV ();
309 }
310 475
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 476 av = (AV *)mg->mg_obj;
312}
313 477
314#define SB do { 478 if (expect_false (AvFILLp (av) >= AvMAX (av)))
315#define SE } while (0) 479 av_extend (av, AvMAX (av) + 1);
316 480
317#define LOAD(state) load_state(aTHX_ (state)); 481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 482}
319 483
320#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 484/** load & save, init *******************************************************/
321 485
322static void 486static void
323load_state(pTHX_ Coro__State c) 487load_perl (pTHX_ Coro__State c)
324{ 488{
325 PL_dowarn = c->dowarn; 489 perl_slots *slot = c->slot;
326 PL_in_eval = c->in_eval; 490 c->slot = 0;
327 491
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack; 492 PL_mainstack = c->mainstack;
331 PL_stack_sp = c->stack_sp;
332 PL_op = c->op;
333 PL_curpad = c->curpad;
334 PL_comppad = c->comppad;
335 PL_compcv = c->compcv;
336 PL_stack_base = c->stack_base;
337 PL_stack_max = c->stack_max;
338 PL_tmps_stack = c->tmps_stack;
339 PL_tmps_floor = c->tmps_floor;
340 PL_tmps_ix = c->tmps_ix;
341 PL_tmps_max = c->tmps_max;
342 PL_markstack = c->markstack;
343 PL_markstack_ptr = c->markstack_ptr;
344 PL_markstack_max = c->markstack_max;
345 PL_scopestack = c->scopestack;
346 PL_scopestack_ix = c->scopestack_ix;
347 PL_scopestack_max = c->scopestack_max;
348 PL_savestack = c->savestack;
349 PL_savestack_ix = c->savestack_ix;
350 PL_savestack_max = c->savestack_max;
351 PL_retstack = c->retstack;
352 PL_retstack_ix = c->retstack_ix;
353 PL_retstack_max = c->retstack_max;
354 PL_curpm = c->curpm;
355 PL_curcop = c->curcop;
356 PL_top_env = c->top_env;
357 493
358 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 494 GvSV (PL_defgv) = slot->defsv;
359 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 495 GvAV (PL_defgv) = slot->defav;
360 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 496 GvSV (PL_errgv) = slot->errsv;
497 GvSV (irsgv) = slot->irsgv;
498
499 #define VAR(name,type) PL_ ## name = slot->name;
500 # include "state.h"
501 #undef VAR
361 502
362 { 503 {
363 dSP; 504 dSP;
505
364 CV *cv; 506 CV *cv;
365 507
366 /* now do the ugly restore mess */ 508 /* now do the ugly restore mess */
367 while ((cv = (CV *)POPs)) 509 while (expect_true (cv = (CV *)POPs))
368 { 510 {
369 AV *padlist = (AV *)POPs;
370
371 if (padlist)
372 {
373 put_padlist (aTHX_ cv); /* mark this padlist as available */ 511 put_padlist (aTHX_ cv); /* mark this padlist as available */
374 CvPADLIST(cv) = padlist; 512 CvDEPTH (cv) = PTR2IV (POPs);
375 } 513 CvPADLIST (cv) = (AV *)POPs;
376
377 ++CvDEPTH(cv);
378 } 514 }
379 515
380 PUTBACK; 516 PUTBACK;
381 } 517 }
382} 518}
383 519
384static void 520static void
385save_state(pTHX_ Coro__State c, int flags) 521save_perl (pTHX_ Coro__State c)
386{ 522{
387 { 523 {
388 dSP; 524 dSP;
389 I32 cxix = cxstack_ix; 525 I32 cxix = cxstack_ix;
390 PERL_CONTEXT *ccstk = cxstack; 526 PERL_CONTEXT *ccstk = cxstack;
… …
393 /* 529 /*
394 * the worst thing you can imagine happens first - we have to save 530 * the worst thing you can imagine happens first - we have to save
395 * (and reinitialize) all cv's in the whole callchain :( 531 * (and reinitialize) all cv's in the whole callchain :(
396 */ 532 */
397 533
398 PUSHs (Nullsv); 534 XPUSHs (Nullsv);
399 /* this loop was inspired by pp_caller */ 535 /* this loop was inspired by pp_caller */
400 for (;;) 536 for (;;)
401 { 537 {
402 while (cxix >= 0) 538 while (expect_true (cxix >= 0))
403 { 539 {
404 PERL_CONTEXT *cx = &ccstk[cxix--]; 540 PERL_CONTEXT *cx = &ccstk[cxix--];
405 541
406 if (CxTYPE(cx) == CXt_SUB) 542 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
407 { 543 {
408 CV *cv = cx->blk_sub.cv; 544 CV *cv = cx->blk_sub.cv;
545
409 if (CvDEPTH(cv)) 546 if (expect_true (CvDEPTH (cv)))
410 { 547 {
411 EXTEND (SP, CvDEPTH(cv)*2); 548 EXTEND (SP, 3);
412
413 while (--CvDEPTH(cv))
414 {
415 /* this tells the restore code to increment CvDEPTH */
416 PUSHs (Nullsv);
417 PUSHs ((SV *)cv);
418 }
419
420 PUSHs ((SV *)CvPADLIST(cv)); 549 PUSHs ((SV *)CvPADLIST (cv));
550 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 551 PUSHs ((SV *)cv);
422 552
553 CvDEPTH (cv) = 0;
423 get_padlist (aTHX_ cv); /* this is a monster */ 554 get_padlist (aTHX_ cv);
424 } 555 }
425 } 556 }
426#ifdef CXt_FORMAT
427 else if (CxTYPE(cx) == CXt_FORMAT)
428 {
429 /* I never used formats, so how should I know how these are implemented? */
430 /* my bold guess is as a simple, plain sub... */
431 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
432 }
433#endif
434 } 557 }
435 558
436 if (top_si->si_type == PERLSI_MAIN) 559 if (expect_true (top_si->si_type == PERLSI_MAIN))
437 break; 560 break;
438 561
439 top_si = top_si->si_prev; 562 top_si = top_si->si_prev;
440 ccstk = top_si->si_cxstack; 563 ccstk = top_si->si_cxstack;
441 cxix = top_si->si_cxix; 564 cxix = top_si->si_cxix;
442 } 565 }
443 566
444 PUTBACK; 567 PUTBACK;
445 } 568 }
446 569
447 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 570 /* allocate some space on the context stack for our purposes */
448 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 571 /* we manually unroll here, as usually 2 slots is enough */
449 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 572 if (SLOT_COUNT >= 1) CXINC;
573 if (SLOT_COUNT >= 2) CXINC;
574 if (SLOT_COUNT >= 3) CXINC;
575 {
576 int i;
577 for (i = 3; i < SLOT_COUNT; ++i)
578 CXINC;
579 }
580 cxstack_ix -= SLOT_COUNT; /* undo allocation */
450 581
451 c->dowarn = PL_dowarn;
452 c->in_eval = PL_in_eval;
453
454 c->curstackinfo = PL_curstackinfo;
455 c->curstack = PL_curstack;
456 c->mainstack = PL_mainstack; 582 c->mainstack = PL_mainstack;
457 c->stack_sp = PL_stack_sp; 583
458 c->op = PL_op; 584 {
459 c->curpad = PL_curpad; 585 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
460 c->comppad = PL_comppad; 586
461 c->compcv = PL_compcv; 587 slot->defav = GvAV (PL_defgv);
462 c->stack_base = PL_stack_base; 588 slot->defsv = DEFSV;
463 c->stack_max = PL_stack_max; 589 slot->errsv = ERRSV;
464 c->tmps_stack = PL_tmps_stack; 590 slot->irsgv = GvSV (irsgv);
465 c->tmps_floor = PL_tmps_floor; 591
466 c->tmps_ix = PL_tmps_ix; 592 #define VAR(name,type) slot->name = PL_ ## name;
467 c->tmps_max = PL_tmps_max; 593 # include "state.h"
468 c->markstack = PL_markstack; 594 #undef VAR
469 c->markstack_ptr = PL_markstack_ptr; 595 }
470 c->markstack_max = PL_markstack_max;
471 c->scopestack = PL_scopestack;
472 c->scopestack_ix = PL_scopestack_ix;
473 c->scopestack_max = PL_scopestack_max;
474 c->savestack = PL_savestack;
475 c->savestack_ix = PL_savestack_ix;
476 c->savestack_max = PL_savestack_max;
477 c->retstack = PL_retstack;
478 c->retstack_ix = PL_retstack_ix;
479 c->retstack_max = PL_retstack_max;
480 c->curpm = PL_curpm;
481 c->curcop = PL_curcop;
482 c->top_env = PL_top_env;
483} 596}
484 597
485/* 598/*
486 * allocate various perl stacks. This is an exact copy 599 * allocate various perl stacks. This is an exact copy
487 * of perl.c:init_stacks, except that it uses less memory 600 * of perl.c:init_stacks, except that it uses less memory
488 * on the (sometimes correct) assumption that coroutines do 601 * on the (sometimes correct) assumption that coroutines do
489 * not usually need a lot of stackspace. 602 * not usually need a lot of stackspace.
490 */ 603 */
491STATIC void 604#if CORO_PREFER_PERL_FUNCTIONS
605# define coro_init_stacks init_stacks
606#else
607static void
492coro_init_stacks (pTHX) 608coro_init_stacks (pTHX)
493{ 609{
494 LOCK; 610 PL_curstackinfo = new_stackinfo(32, 8);
495
496 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
497 PL_curstackinfo->si_type = PERLSI_MAIN; 611 PL_curstackinfo->si_type = PERLSI_MAIN;
498 PL_curstack = PL_curstackinfo->si_stack; 612 PL_curstack = PL_curstackinfo->si_stack;
499 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 613 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
500 614
501 PL_stack_base = AvARRAY(PL_curstack); 615 PL_stack_base = AvARRAY(PL_curstack);
502 PL_stack_sp = PL_stack_base; 616 PL_stack_sp = PL_stack_base;
503 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 617 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
504 618
505 New(50,PL_tmps_stack,96,SV*); 619 New(50,PL_tmps_stack,32,SV*);
506 PL_tmps_floor = -1; 620 PL_tmps_floor = -1;
507 PL_tmps_ix = -1; 621 PL_tmps_ix = -1;
508 PL_tmps_max = 96; 622 PL_tmps_max = 32;
509 623
510 New(54,PL_markstack,16,I32); 624 New(54,PL_markstack,16,I32);
511 PL_markstack_ptr = PL_markstack; 625 PL_markstack_ptr = PL_markstack;
512 PL_markstack_max = PL_markstack + 16; 626 PL_markstack_max = PL_markstack + 16;
513 627
514#ifdef SET_MARK_OFFSET 628#ifdef SET_MARK_OFFSET
515 SET_MARK_OFFSET; 629 SET_MARK_OFFSET;
516#endif 630#endif
517 631
518 New(54,PL_scopestack,16,I32); 632 New(54,PL_scopestack,8,I32);
519 PL_scopestack_ix = 0; 633 PL_scopestack_ix = 0;
520 PL_scopestack_max = 16; 634 PL_scopestack_max = 8;
521 635
522 New(54,PL_savestack,96,ANY); 636 New(54,PL_savestack,24,ANY);
523 PL_savestack_ix = 0; 637 PL_savestack_ix = 0;
524 PL_savestack_max = 96; 638 PL_savestack_max = 24;
525 639
640#if !PERL_VERSION_ATLEAST (5,10,0)
526 New(54,PL_retstack,8,OP*); 641 New(54,PL_retstack,4,OP*);
527 PL_retstack_ix = 0; 642 PL_retstack_ix = 0;
528 PL_retstack_max = 8; 643 PL_retstack_max = 4;
529 644#endif
530 UNLOCK;
531} 645}
646#endif
532 647
533/* 648/*
534 * destroy the stacks, the callchain etc... 649 * destroy the stacks, the callchain etc...
535 */ 650 */
536STATIC void 651static void
537destroy_stacks(pTHX) 652coro_destruct_stacks (pTHX)
538{ 653{
539 if (!IN_DESTRUCT)
540 {
541 /* is this ugly, I ask? */
542 LEAVE_SCOPE (0);
543
544 /* sure it is, but more important: is it correct?? :/ */
545 FREETMPS;
546
547 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
548 }
549
550 while (PL_curstackinfo->si_next) 654 while (PL_curstackinfo->si_next)
551 PL_curstackinfo = PL_curstackinfo->si_next; 655 PL_curstackinfo = PL_curstackinfo->si_next;
552 656
553 while (PL_curstackinfo) 657 while (PL_curstackinfo)
554 { 658 {
555 PERL_SI *p = PL_curstackinfo->si_prev; 659 PERL_SI *p = PL_curstackinfo->si_prev;
556 660
557 { /*D*//*remove*/
558 dSP;
559 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
560 PUTBACK; /* possibly superfluous */
561 }
562
563 if (!IN_DESTRUCT) 661 if (!IN_DESTRUCT)
564 {
565 dounwind (-1);/*D*//*remove*/
566 SvREFCNT_dec (PL_curstackinfo->si_stack); 662 SvREFCNT_dec (PL_curstackinfo->si_stack);
567 }
568 663
569 Safefree (PL_curstackinfo->si_cxstack); 664 Safefree (PL_curstackinfo->si_cxstack);
570 Safefree (PL_curstackinfo); 665 Safefree (PL_curstackinfo);
571 PL_curstackinfo = p; 666 PL_curstackinfo = p;
572 } 667 }
573 668
574 Safefree (PL_tmps_stack); 669 Safefree (PL_tmps_stack);
575 Safefree (PL_markstack); 670 Safefree (PL_markstack);
576 Safefree (PL_scopestack); 671 Safefree (PL_scopestack);
577 Safefree (PL_savestack); 672 Safefree (PL_savestack);
673#if !PERL_VERSION_ATLEAST (5,10,0)
578 Safefree (PL_retstack); 674 Safefree (PL_retstack);
675#endif
676}
677
678static size_t
679coro_rss (pTHX_ struct coro *coro)
680{
681 size_t rss = sizeof (*coro);
682
683 if (coro->mainstack)
684 {
685 perl_slots tmp_slot;
686 perl_slots *slot;
687
688 if (coro->flags & CF_RUNNING)
689 {
690 slot = &tmp_slot;
691
692 #define VAR(name,type) slot->name = PL_ ## name;
693 # include "state.h"
694 #undef VAR
695 }
696 else
697 slot = coro->slot;
698
699 if (slot)
700 {
701 rss += sizeof (slot->curstackinfo);
702 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
703 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
704 rss += slot->tmps_max * sizeof (SV *);
705 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
706 rss += slot->scopestack_max * sizeof (I32);
707 rss += slot->savestack_max * sizeof (ANY);
708
709#if !PERL_VERSION_ATLEAST (5,10,0)
710 rss += slot->retstack_max * sizeof (OP *);
711#endif
712 }
713 }
714
715 return rss;
716}
717
718/** coroutine stack handling ************************************************/
719
720static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
721static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
722static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
723
724/* apparently < 5.8.8 */
725#ifndef MgPV_nolen_const
726#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
727 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
728 (const char*)(mg)->mg_ptr)
729#endif
730
731/* we sometimes need to create the effect of entersub calling us */
732#define ENTERSUB_HEAD ENTER; SAVETMPS
733/* we somtimes need to create the effect of leaving via entersub */
734#define ENTERSUB_TAIL LEAVE
735
736/*
737 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide
740 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */
745static int
746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = 0;
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
789}
790
791static int
792coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
793{
794 const char *s = MgPV_nolen_const (mg);
795
796 if (*s == '_')
797 {
798 SV **svp = 0;
799
800 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802
803 if (svp)
804 {
805 SV *old = *svp;
806 *svp = newSVsv (sv);
807 SvREFCNT_dec (old);
808 return 0;
809 }
810 }
811
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
579} 813}
580 814
581static void 815static void
582allocate_stack (Coro__State ctx, int alloc) 816coro_setup (pTHX_ struct coro *coro)
583{
584 coro_stack *stack;
585
586 New (0, stack, 1, coro_stack);
587
588 stack->refcnt = 1;
589 stack->usecnt = 1;
590 stack->gencnt = ctx->gencnt = 0;
591
592 if (alloc)
593 {
594#if HAVE_MMAP
595 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
596 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
597 if (stack->sptr == (void *)-1)
598#endif
599 {
600 /*FIXME*//*D*//* reasonable stack size! */
601 stack->ssize = - (STACKSIZE * sizeof (long));
602 New (0, stack->sptr, STACKSIZE, long);
603 }
604 }
605 else
606 stack->sptr = 0;
607
608 ctx->stack = stack;
609}
610
611static void
612deallocate_stack (Coro__State ctx)
613{
614 coro_stack *stack = ctx->stack;
615
616 ctx->stack = 0;
617
618 if (stack)
619 {
620 if (!--stack->refcnt)
621 {
622#ifdef HAVE_MMAP
623 if (stack->ssize > 0 && stack->sptr)
624 munmap (stack->sptr, stack->ssize);
625 else
626#endif
627 Safefree (stack->sptr);
628
629 Safefree (stack);
630 }
631 else if (ctx->gencnt == stack->gencnt)
632 --stack->usecnt;
633 }
634}
635
636static void
637setup_coro (void *arg)
638{ 817{
639 /* 818 /*
640 * emulate part of the perl startup here. 819 * emulate part of the perl startup here.
641 */ 820 */
642 dTHX;
643 dSP;
644 Coro__State ctx = (Coro__State)arg;
645 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
646
647 coro_init_stacks (aTHX); 821 coro_init_stacks (aTHX);
648 /*PL_curcop = 0;*/ 822
649 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 823 PL_runops = RUNOPS_DEFAULT;
824 PL_curcop = &PL_compiling;
825 PL_in_eval = EVAL_NULL;
826 PL_comppad = 0;
827 PL_curpm = 0;
828 PL_curpad = 0;
829 PL_localizing = 0;
830 PL_dirty = 0;
831 PL_restartop = 0;
832#if PERL_VERSION_ATLEAST (5,10,0)
833 PL_parser = 0;
834#endif
835
836 /* recreate the die/warn hooks */
837 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
838 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
839
840 GvSV (PL_defgv) = newSV (0);
841 GvAV (PL_defgv) = coro->args; coro->args = 0;
842 GvSV (PL_errgv) = newSV (0);
843 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
844 PL_rs = newSVsv (GvSV (irsgv));
845 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
846
847 {
848 dSP;
849 UNOP myop;
850
851 Zero (&myop, 1, UNOP);
852 myop.op_next = Nullop;
853 myop.op_flags = OPf_WANT_VOID;
854
855 PUSHMARK (SP);
856 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
857 PUTBACK;
858 PL_op = (OP *)&myop;
859 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
860 SPAGAIN;
861 }
862
863 /* this newly created coroutine might be run on an existing cctx which most
864 * likely was suspended in set_stacklevel, called from entersub.
865 * set_stacklevel doesn't do anything on return, but entersub does LEAVE,
866 * so we ENTER here for symmetry.
867 */
868 ENTERSUB_HEAD;
869}
870
871static void
872coro_destruct (pTHX_ struct coro *coro)
873{
874 if (!IN_DESTRUCT)
875 {
876 /* restore all saved variables and stuff */
877 LEAVE_SCOPE (0);
878 assert (PL_tmps_floor == -1);
879
880 /* free all temporaries */
881 FREETMPS;
882 assert (PL_tmps_ix == -1);
883
884 /* unwind all extra stacks */
885 POPSTACK_TO (PL_mainstack);
886
887 /* unwind main stack */
888 dounwind (-1);
889 }
890
891 SvREFCNT_dec (GvSV (PL_defgv));
650 SvREFCNT_dec (GvAV (PL_defgv)); 892 SvREFCNT_dec (GvAV (PL_defgv));
651 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 893 SvREFCNT_dec (GvSV (PL_errgv));
894 SvREFCNT_dec (PL_defoutgv);
895 SvREFCNT_dec (PL_rs);
896 SvREFCNT_dec (GvSV (irsgv));
652 897
653 SPAGAIN; 898 SvREFCNT_dec (PL_diehook);
899 SvREFCNT_dec (PL_warnhook);
900
901 SvREFCNT_dec (coro->saved_deffh);
902 SvREFCNT_dec (coro->throw);
654 903
655 if (ctx->stack) 904 coro_destruct_stacks (aTHX);
656 { 905}
657 ctx->cursp = 0;
658 906
659 PUSHMARK(SP); 907INLINE void
660 PUTBACK; 908free_coro_mortal (pTHX)
661 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 909{
662 910 if (expect_true (coro_mortal))
663 if (SvTRUE (ERRSV))
664 croak (NULL);
665 else
666 croak ("FATAL: CCTXT coroutine returned!");
667 } 911 {
668 else 912 SvREFCNT_dec (coro_mortal);
913 coro_mortal = 0;
669 { 914 }
670 UNOP myop; 915}
671 916
672 PL_op = (OP *)&myop; 917static int
918runops_trace (pTHX)
919{
920 COP *oldcop = 0;
921 int oldcxix = -2;
922 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
923 coro_cctx *cctx = coro->cctx;
673 924
674 Zero(&myop, 1, UNOP); 925 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
675 myop.op_next = Nullop;
676 myop.op_flags = OPf_WANT_VOID;
677
678 PUSHMARK(SP);
679 XPUSHs (sub_init);
680 /*
681 * the next line is slightly wrong, as PL_op->op_next
682 * is actually being executed so we skip the first op.
683 * that doesn't matter, though, since it is only
684 * pp_nextstate and we never return...
685 * ah yes, and I don't care anyways ;)
686 */
687 PUTBACK;
688 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
689 SPAGAIN;
690
691 ENTER; /* necessary e.g. for dounwind */
692 } 926 {
693} 927 PERL_ASYNC_CHECK ();
694 928
695static void 929 if (cctx->flags & CC_TRACE_ALL)
696continue_coro (void *arg)
697{
698 /*
699 * this is a _very_ stripped down perl interpreter ;)
700 */
701 dTHX;
702 Coro__State ctx = (Coro__State)arg;
703 JMPENV coro_start_env;
704
705 PL_top_env = &ctx->start_env;
706
707 ctx->cursp = 0;
708 PL_op = PL_op->op_next;
709 CALLRUNOPS(aTHX);
710
711 abort ();
712}
713
714STATIC void
715transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
716{
717 dSTACKLEVEL;
718
719 if (prev != next)
720 {
721 if (next->mainstack)
722 { 930 {
723 LOCK; 931 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
724 SAVE (prev, flags);
725 LOAD (next);
726 UNLOCK;
727
728 /* mark this state as in-use */
729 next->mainstack = 0;
730 next->tmps_ix = -2;
731
732 /* stacklevel changed? if yes, grab the stack for us! */
733 if (flags & TRANSFER_SAVE_CCTXT)
734 { 932 {
735 if (!prev->stack) 933 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
736 allocate_stack (prev, 0); 934 SV **bot, **top;
737 else if (prev->cursp != stacklevel 935 AV *av = newAV (); /* return values */
738 && prev->stack->usecnt > 1) 936 SV **cb;
937 dSP;
938
939 GV *gv = CvGV (cx->blk_sub.cv);
940 SV *fullname = sv_2mortal (newSV (0));
941 if (isGV (gv))
942 gv_efullname3 (fullname, gv, 0);
943
944 bot = PL_stack_base + cx->blk_oldsp + 1;
945 top = cx->blk_gimme == G_ARRAY ? SP + 1
946 : cx->blk_gimme == G_SCALAR ? bot + 1
947 : bot;
948
949 av_extend (av, top - bot);
950 while (bot < top)
951 av_push (av, SvREFCNT_inc_NN (*bot++));
952
953 PL_runops = RUNOPS_DEFAULT;
954 ENTER;
955 SAVETMPS;
956 EXTEND (SP, 3);
957 PUSHMARK (SP);
958 PUSHs (&PL_sv_no);
959 PUSHs (fullname);
960 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
961 PUTBACK;
962 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
963 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
964 SPAGAIN;
965 FREETMPS;
966 LEAVE;
967 PL_runops = runops_trace;
968 }
969
970 if (oldcop != PL_curcop)
971 {
972 oldcop = PL_curcop;
973
974 if (PL_curcop != &PL_compiling)
739 { 975 {
740 prev->gencnt = ++prev->stack->gencnt; 976 SV **cb;
741 prev->stack->usecnt = 1;
742 }
743 977
744 /* has our stack been invalidated? */ 978 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
745 if (next->stack && next->stack->gencnt != next->gencnt)
746 { 979 {
747 deallocate_stack (next); 980 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
748 allocate_stack (next, 1); 981
749 coro_create (&(next->stack->cctx), 982 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
750 continue_coro, (void *)next, 983 {
751 next->stack->sptr, labs (next->stack->ssize)); 984 runops_proc_t old_runops = PL_runops;
985 dSP;
986 GV *gv = CvGV (cx->blk_sub.cv);
987 SV *fullname = sv_2mortal (newSV (0));
988
989 if (isGV (gv))
990 gv_efullname3 (fullname, gv, 0);
991
992 PL_runops = RUNOPS_DEFAULT;
993 ENTER;
994 SAVETMPS;
995 EXTEND (SP, 3);
996 PUSHMARK (SP);
997 PUSHs (&PL_sv_yes);
998 PUSHs (fullname);
999 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1000 PUTBACK;
1001 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1002 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1003 SPAGAIN;
1004 FREETMPS;
1005 LEAVE;
1006 PL_runops = runops_trace;
1007 }
1008
1009 oldcxix = cxstack_ix;
752 } 1010 }
753 1011
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1012 if (cctx->flags & CC_TRACE_LINE)
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 }
758 else
759 next->cursp = stacklevel;
760 }
761 else if (next->tmps_ix == -2)
762 croak ("tried to transfer to running coroutine");
763 else
764 {
765 LOCK;
766 SAVE (prev, -1); /* first get rid of the old state */
767 UNLOCK;
768
769 if (flags & TRANSFER_SAVE_CCTXT)
770 {
771 if (!prev->stack)
772 allocate_stack (prev, 0);
773
774 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
775 { 1013 {
776 PL_top_env = &next->start_env; 1014 dSP;
777 1015
778 setup_coro (next); 1016 PL_runops = RUNOPS_DEFAULT;
779 next->cursp = stacklevel; 1017 ENTER;
780 1018 SAVETMPS;
781 prev->stack->refcnt++; 1019 EXTEND (SP, 3);
782 prev->stack->usecnt++; 1020 PL_runops = RUNOPS_DEFAULT;
783 next->stack = prev->stack; 1021 PUSHMARK (SP);
784 next->gencnt = prev->gencnt; 1022 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1023 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
785 } 1031 }
786 else
787 {
788 assert (!next->stack);
789 allocate_stack (next, 1);
790 coro_create (&(next->stack->cctx),
791 setup_coro, (void *)next,
792 next->stack->sptr, labs (next->stack->ssize));
793 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
794 prev->cursp = stacklevel;
795 /* don't add any code here */
796 } 1032 }
797 } 1033 }
798 else
799 {
800 setup_coro (next);
801 next->cursp = stacklevel;
802 }
803 } 1034 }
804 } 1035 }
805 1036
1037 TAINT_NOT;
1038 return 0;
1039}
1040
1041static void
1042prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1043{
1044 ta->prev = (struct coro *)cctx;
1045 ta->next = 0;
1046}
1047
1048/* inject a fake call to Coro::State::_cctx_init into the execution */
1049/* _cctx_init should be careful, as it could be called at almost any time */
1050/* during execution of a perl program */
1051/* also initialises PL_top_env */
1052static void NOINLINE
1053cctx_prepare (pTHX_ coro_cctx *cctx)
1054{
1055 dSP;
1056 UNOP myop;
1057
1058 PL_top_env = &PL_start_env;
1059
1060 if (cctx->flags & CC_TRACE)
1061 PL_runops = runops_trace;
1062
1063 Zero (&myop, 1, UNOP);
1064 myop.op_next = PL_op;
1065 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1066
1067 PUSHMARK (SP);
1068 EXTEND (SP, 2);
1069 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1070 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1071 PUTBACK;
1072 PL_op = (OP *)&myop;
1073 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1074 SPAGAIN;
1075}
1076
1077/* the tail of transfer: execute stuff we can only do after a transfer */
1078INLINE void
1079transfer_tail (pTHX)
1080{
1081 struct coro *next = (struct coro *)transfer_next;
1082 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1083 assert (("FATAL: transfer_next was zero in transfer_tail (please report)", next));
1084
1085 free_coro_mortal (aTHX);
1086 UNLOCK;
1087
1088 if (expect_false (next->throw))
1089 {
1090 SV *exception = sv_2mortal (next->throw);
1091
1092 next->throw = 0;
1093 sv_setsv (ERRSV, exception);
1094 croak (0);
1095 }
1096}
1097
1098/*
1099 * this is a _very_ stripped down perl interpreter ;)
1100 */
1101static void
1102cctx_run (void *arg)
1103{
1104#ifdef USE_ITHREADS
1105# if CORO_PTHREAD
1106 PERL_SET_CONTEXT (coro_thx);
1107# endif
1108#endif
1109 {
1110 dTHX;
1111
1112 /* entersub called ENTER, but we never 'returned', undo that here */
1113 ENTERSUB_TAIL;
1114
1115 /* we now skip the entersub that did lead to transfer() */
1116 PL_op = PL_op->op_next;
1117
1118 /* inject a fake subroutine call to cctx_init */
1119 cctx_prepare (aTHX_ (coro_cctx *)arg);
1120
1121 /* cctx_run is the alternative tail of transfer() */
1122 transfer_tail (aTHX);
1123
1124 /* somebody or something will hit me for both perl_run and PL_restartop */
1125 PL_restartop = PL_op;
1126 perl_run (PL_curinterp);
1127
1128 /*
1129 * If perl-run returns we assume exit() was being called or the coro
1130 * fell off the end, which seems to be the only valid (non-bug)
1131 * reason for perl_run to return. We try to exit by jumping to the
1132 * bootstrap-time "top" top_env, as we cannot restore the "main"
1133 * coroutine as Coro has no such concept
1134 */
1135 PL_top_env = main_top_env;
1136 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1137 }
1138}
1139
1140static coro_cctx *
1141cctx_new ()
1142{
1143 coro_cctx *cctx;
1144
1145 ++cctx_count;
1146 New (0, cctx, 1, coro_cctx);
1147
1148 cctx->gen = cctx_gen;
1149 cctx->flags = 0;
1150 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1151
1152 return cctx;
1153}
1154
1155/* create a new cctx only suitable as source */
1156static coro_cctx *
1157cctx_new_empty ()
1158{
1159 coro_cctx *cctx = cctx_new ();
1160
1161 cctx->sptr = 0;
1162 coro_create (&cctx->cctx, 0, 0, 0, 0);
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx suitable as destination/running a perl interpreter */
1168static coro_cctx *
1169cctx_new_run ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172 void *stack_start;
1173 size_t stack_size;
1174
1175#if HAVE_MMAP
1176 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1177 /* mmap supposedly does allocate-on-write for us */
1178 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1179
1180 if (cctx->sptr != (void *)-1)
1181 {
1182 #if CORO_STACKGUARD
1183 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1184 #endif
1185 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1186 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1187 cctx->flags |= CC_MAPPED;
1188 }
1189 else
1190#endif
1191 {
1192 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1193 New (0, cctx->sptr, cctx_stacksize, long);
1194
1195 if (!cctx->sptr)
1196 {
1197 perror ("FATAL: unable to allocate stack for coroutine");
1198 _exit (EXIT_FAILURE);
1199 }
1200
1201 stack_start = cctx->sptr;
1202 stack_size = cctx->ssize;
1203 }
1204
1205 #if CORO_USE_VALGRIND
1206 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1207 #endif
1208
1209 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1210
1211 return cctx;
1212}
1213
1214static void
1215cctx_destroy (coro_cctx *cctx)
1216{
1217 if (!cctx)
1218 return;
1219
1220 --cctx_count;
1221 coro_destroy (&cctx->cctx);
1222
1223 /* coro_transfer creates new, empty cctx's */
1224 if (cctx->sptr)
1225 {
1226 #if CORO_USE_VALGRIND
1227 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1228 #endif
1229
1230#if HAVE_MMAP
1231 if (cctx->flags & CC_MAPPED)
1232 munmap (cctx->sptr, cctx->ssize);
1233 else
1234#endif
1235 Safefree (cctx->sptr);
1236 }
1237
1238 Safefree (cctx);
1239}
1240
1241/* wether this cctx should be destructed */
1242#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1243
1244static coro_cctx *
1245cctx_get (pTHX)
1246{
1247 while (expect_true (cctx_first))
1248 {
1249 coro_cctx *cctx = cctx_first;
1250 cctx_first = cctx->next;
1251 --cctx_idle;
1252
1253 if (expect_true (!CCTX_EXPIRED (cctx)))
1254 return cctx;
1255
1256 cctx_destroy (cctx);
1257 }
1258
1259 return cctx_new_run ();
1260}
1261
1262static void
1263cctx_put (coro_cctx *cctx)
1264{
1265 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1266
1267 /* free another cctx if overlimit */
1268 if (expect_false (cctx_idle >= cctx_max_idle))
1269 {
1270 coro_cctx *first = cctx_first;
1271 cctx_first = first->next;
1272 --cctx_idle;
1273
1274 cctx_destroy (first);
1275 }
1276
1277 ++cctx_idle;
1278 cctx->next = cctx_first;
1279 cctx_first = cctx;
1280}
1281
1282/** coroutine switching *****************************************************/
1283
1284static void
1285transfer_check (pTHX_ struct coro *prev, struct coro *next)
1286{
1287 if (expect_true (prev != next))
1288 {
1289 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1290 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1291
1292 if (expect_false (next->flags & CF_RUNNING))
1293 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1294
1295 if (expect_false (next->flags & CF_DESTROYED))
1296 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1297
1298#if !PERL_VERSION_ATLEAST (5,10,0)
1299 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1300 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1301#endif
1302 }
1303}
1304
1305/* always use the TRANSFER macro */
1306static void NOINLINE
1307transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1308{
1309 dSTACKLEVEL;
1310
1311 /* sometimes transfer is only called to set idle_sp */
1312 if (expect_false (!next))
1313 {
1314 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1315 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1316 }
1317 else if (expect_true (prev != next))
1318 {
1319 coro_cctx *prev__cctx;
1320
1321 if (expect_false (prev->flags & CF_NEW))
1322 {
1323 /* create a new empty/source context */
1324 prev->cctx = cctx_new_empty ();
1325 prev->flags &= ~CF_NEW;
1326 prev->flags |= CF_RUNNING;
1327 }
1328
1329 prev->flags &= ~CF_RUNNING;
1330 next->flags |= CF_RUNNING;
1331
1332 LOCK;
1333
1334 /* first get rid of the old state */
1335 save_perl (aTHX_ prev);
1336
1337 if (expect_false (next->flags & CF_NEW))
1338 {
1339 /* need to start coroutine */
1340 next->flags &= ~CF_NEW;
1341 /* setup coroutine call */
1342 coro_setup (aTHX_ next);
1343 }
1344 else
1345 load_perl (aTHX_ next);
1346
1347 prev__cctx = prev->cctx;
1348
1349 /* possibly untie and reuse the cctx */
1350 if (expect_true (
1351 prev__cctx->idle_sp == STACKLEVEL
1352 && !(prev__cctx->flags & CC_TRACE)
1353 && !force_cctx
1354 ))
1355 {
1356 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1357 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1358
1359 prev->cctx = 0;
1360
1361 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1362 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1363 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1364 if (!next->cctx)
1365 next->cctx = cctx_get (aTHX);
1366
1367 cctx_put (prev__cctx);
1368 }
1369
1370 ++next->usecount;
1371
1372 if (expect_true (!next->cctx))
1373 next->cctx = cctx_get (aTHX);
1374
1375 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1376 transfer_next = next;
1377
1378 if (expect_false (prev__cctx != next->cctx))
1379 {
1380 prev__cctx->top_env = PL_top_env;
1381 PL_top_env = next->cctx->top_env;
1382 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1383 }
1384
1385 transfer_tail (aTHX);
1386 }
1387}
1388
1389#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1390#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1391
1392/** high level stuff ********************************************************/
1393
1394static int
1395coro_state_destroy (pTHX_ struct coro *coro)
1396{
1397 if (coro->flags & CF_DESTROYED)
1398 return 0;
1399
1400 coro->flags |= CF_DESTROYED;
1401
1402 if (coro->flags & CF_READY)
1403 {
1404 /* reduce nready, as destroying a ready coro effectively unreadies it */
1405 /* alternative: look through all ready queues and remove the coro */
1406 LOCK;
1407 --coro_nready;
1408 UNLOCK;
1409 }
1410 else
1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1412
1413 if (coro->mainstack && coro->mainstack != main_mainstack)
1414 {
1415 struct coro temp;
1416
1417 if (coro->flags & CF_RUNNING)
1418 croak ("FATAL: tried to destroy currently running coroutine");
1419
1420 save_perl (aTHX_ &temp);
1421 load_perl (aTHX_ coro);
1422
1423 coro_destruct (aTHX_ coro);
1424
1425 load_perl (aTHX_ &temp);
1426
1427 coro->slot = 0;
1428 }
1429
1430 cctx_destroy (coro->cctx);
1431 SvREFCNT_dec (coro->args);
1432
1433 if (coro->next) coro->next->prev = coro->prev;
1434 if (coro->prev) coro->prev->next = coro->next;
1435 if (coro == coro_first) coro_first = coro->next;
1436
1437 return 1;
1438}
1439
1440static int
1441coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1442{
1443 struct coro *coro = (struct coro *)mg->mg_ptr;
1444 mg->mg_ptr = 0;
1445
1446 coro->hv = 0;
1447
1448 if (--coro->refcnt < 0)
1449 {
1450 coro_state_destroy (aTHX_ coro);
1451 Safefree (coro);
1452 }
1453
1454 return 0;
1455}
1456
1457static int
1458coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1459{
1460 struct coro *coro = (struct coro *)mg->mg_ptr;
1461
1462 ++coro->refcnt;
1463
1464 return 0;
1465}
1466
1467static MGVTBL coro_state_vtbl = {
1468 0, 0, 0, 0,
1469 coro_state_free,
1470 0,
1471#ifdef MGf_DUP
1472 coro_state_dup,
1473#else
1474# define MGf_DUP 0
1475#endif
1476};
1477
1478static void
1479prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1480{
1481 ta->prev = SvSTATE (prev_sv);
1482 ta->next = SvSTATE (next_sv);
1483 TRANSFER_CHECK (*ta);
1484}
1485
1486static void
1487api_transfer (SV *prev_sv, SV *next_sv)
1488{
1489 dTHX;
1490 struct transfer_args ta;
1491
1492 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1493 TRANSFER (ta, 1);
1494}
1495
1496/** Coro ********************************************************************/
1497
1498static void
1499coro_enq (pTHX_ SV *coro_sv)
1500{
1501 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1502}
1503
1504static SV *
1505coro_deq (pTHX)
1506{
1507 int prio;
1508
1509 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1510 if (AvFILLp (coro_ready [prio]) >= 0)
1511 return av_shift (coro_ready [prio]);
1512
1513 return 0;
1514}
1515
1516static int
1517api_ready (SV *coro_sv)
1518{
1519 dTHX;
1520 struct coro *coro;
1521 SV *sv_hook;
1522 void (*xs_hook)(void);
1523
1524 if (SvROK (coro_sv))
1525 coro_sv = SvRV (coro_sv);
1526
1527 coro = SvSTATE (coro_sv);
1528
1529 if (coro->flags & CF_READY)
1530 return 0;
1531
1532 coro->flags |= CF_READY;
1533
806 LOCK; 1534 LOCK;
807 if (coro_mortal) 1535
808 { 1536 sv_hook = coro_nready ? 0 : coro_readyhook;
809 SvREFCNT_dec (coro_mortal); 1537 xs_hook = coro_nready ? 0 : coroapi.readyhook;
810 coro_mortal = 0; 1538
811 } 1539 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1540 ++coro_nready;
1541
812 UNLOCK; 1542 UNLOCK;
813} 1543
814 1544 if (sv_hook)
815#define SV_CORO(sv,func) \
816 do { \
817 if (SvROK (sv)) \
818 sv = SvRV (sv); \
819 \
820 if (SvTYPE (sv) == SVt_PVHV) \
821 { \
822 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
823 \
824 if (!he) \
825 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
826 \
827 (sv) = SvRV (HeVAL(he)); \
828 } \
829 \
830 /* must also be changed inside Coro::Cont::yield */ \
831 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
832 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
833 \
834 } while(0)
835
836#define SvSTATE(sv) (struct coro *)SvIV (sv)
837
838static void
839api_transfer(pTHX_ SV *prev, SV *next, int flags)
840{
841 SV_CORO (prev, "Coro::transfer");
842 SV_CORO (next, "Coro::transfer");
843
844 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
845}
846
847/** Coro ********************************************************************/
848
849#define PRIO_MAX 3
850#define PRIO_HIGH 1
851#define PRIO_NORMAL 0
852#define PRIO_LOW -1
853#define PRIO_IDLE -3
854#define PRIO_MIN -4
855
856/* for Coro.pm */
857static GV *coro_current, *coro_idle;
858static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
859static int coro_nready;
860
861static void
862coro_enq (pTHX_ SV *sv)
863{
864 if (SvTYPE (sv) == SVt_PVHV)
865 {
866 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
867 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
868
869 prio = prio > PRIO_MAX ? PRIO_MAX
870 : prio < PRIO_MIN ? PRIO_MIN
871 : prio;
872
873 av_push (coro_ready [prio - PRIO_MIN], sv);
874 coro_nready++;
875
876 return;
877 }
878
879 croak ("Coro::ready tried to enqueue something that is not a coroutine");
880}
881
882static SV *
883coro_deq (pTHX_ int min_prio)
884{
885 int prio = PRIO_MAX - PRIO_MIN;
886
887 min_prio -= PRIO_MIN;
888 if (min_prio < 0)
889 min_prio = 0;
890
891 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
892 if (av_len (coro_ready[prio]) >= 0)
893 { 1545 {
894 coro_nready--; 1546 dSP;
895 return av_shift (coro_ready[prio]); 1547
1548 ENTER;
1549 SAVETMPS;
1550
1551 PUSHMARK (SP);
1552 PUTBACK;
1553 call_sv (sv_hook, G_DISCARD);
1554 SPAGAIN;
1555
1556 FREETMPS;
1557 LEAVE;
896 } 1558 }
897 1559
1560 if (xs_hook)
1561 xs_hook ();
1562
898 return 0; 1563 return 1;
899} 1564}
900 1565
901static void 1566static int
902api_ready (SV *coro) 1567api_is_ready (SV *coro_sv)
903{ 1568{
904 dTHX; 1569 dTHX;
905 1570
906 if (SvROK (coro)) 1571 return !!(SvSTATE (coro_sv)->flags & CF_READY);
907 coro = SvRV (coro); 1572}
1573
1574INLINE void
1575prepare_schedule (pTHX_ struct transfer_args *ta)
1576{
1577 SV *prev_sv, *next_sv;
1578
1579 for (;;)
1580 {
1581 LOCK;
1582 next_sv = coro_deq (aTHX);
1583
1584 /* nothing to schedule: call the idle handler */
1585 if (expect_false (!next_sv))
1586 {
1587 dSP;
1588 UNLOCK;
1589
1590 ENTER;
1591 SAVETMPS;
1592
1593 PUSHMARK (SP);
1594 PUTBACK;
1595 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1596 SPAGAIN;
1597
1598 FREETMPS;
1599 LEAVE;
1600 continue;
1601 }
1602
1603 ta->next = SvSTATE (next_sv);
1604
1605 /* cannot transfer to destroyed coros, skip and look for next */
1606 if (expect_false (ta->next->flags & CF_DESTROYED))
1607 {
1608 UNLOCK;
1609 SvREFCNT_dec (next_sv);
1610 /* coro_nready has already been taken care of by destroy */
1611 continue;
1612 }
1613
1614 --coro_nready;
1615 UNLOCK;
1616 break;
1617 }
1618
1619 /* free this only after the transfer */
1620 prev_sv = SvRV (coro_current);
1621 ta->prev = SvSTATE (prev_sv);
1622 TRANSFER_CHECK (*ta);
1623 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1624 ta->next->flags &= ~CF_READY;
1625 SvRV_set (coro_current, next_sv);
908 1626
909 LOCK; 1627 LOCK;
910 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1628 free_coro_mortal (aTHX);
1629 coro_mortal = prev_sv;
911 UNLOCK; 1630 UNLOCK;
1631}
1632
1633INLINE void
1634prepare_cede (pTHX_ struct transfer_args *ta)
1635{
1636 api_ready (coro_current);
1637 prepare_schedule (aTHX_ ta);
1638}
1639
1640static int
1641prepare_cede_notself (pTHX_ struct transfer_args *ta)
1642{
1643 if (coro_nready)
1644 {
1645 SV *prev = SvRV (coro_current);
1646 prepare_schedule (aTHX_ ta);
1647 api_ready (prev);
1648 return 1;
1649 }
1650 else
1651 return 0;
912} 1652}
913 1653
914static void 1654static void
915api_schedule (void) 1655api_schedule (void)
916{ 1656{
917 dTHX; 1657 dTHX;
1658 struct transfer_args ta;
918 1659
919 SV *prev, *next; 1660 prepare_schedule (aTHX_ &ta);
1661 TRANSFER (ta, 1);
1662}
920 1663
921 LOCK; 1664static int
1665api_cede (void)
1666{
1667 dTHX;
1668 struct transfer_args ta;
922 1669
923 prev = SvRV (GvSV (coro_current)); 1670 prepare_cede (aTHX_ &ta);
924 next = coro_deq (aTHX_ PRIO_MIN);
925 1671
926 if (!next) 1672 if (expect_true (ta.prev != ta.next))
927 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1673 {
1674 TRANSFER (ta, 1);
1675 return 1;
1676 }
1677 else
1678 return 0;
1679}
928 1680
929 /* free this only after the transfer */ 1681static int
930 coro_mortal = prev; 1682api_cede_notself (void)
931 SV_CORO (prev, "Coro::schedule"); 1683{
1684 dTHX;
1685 struct transfer_args ta;
932 1686
933 SvRV (GvSV (coro_current)) = next; 1687 if (prepare_cede_notself (aTHX_ &ta))
934 1688 {
935 SV_CORO (next, "Coro::schedule"); 1689 TRANSFER (ta, 1);
936 1690 return 1;
937 UNLOCK; 1691 }
938 1692 else
939 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1693 return 0;
940 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
941} 1694}
942 1695
943static void 1696static void
944api_cede (void) 1697api_trace (SV *coro_sv, int flags)
945{ 1698{
946 dTHX; 1699 dTHX;
1700 struct coro *coro = SvSTATE (coro_sv);
947 1701
948 LOCK; 1702 if (flags & CC_TRACE)
949 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1703 {
950 UNLOCK; 1704 if (!coro->cctx)
1705 coro->cctx = cctx_new_run ();
1706 else if (!(coro->cctx->flags & CC_TRACE))
1707 croak ("cannot enable tracing on coroutine with custom stack");
951 1708
1709 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1710 }
1711 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1712 {
1713 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1714
1715 if (coro->flags & CF_RUNNING)
1716 PL_runops = RUNOPS_DEFAULT;
1717 else
1718 coro->slot->runops = RUNOPS_DEFAULT;
1719 }
1720}
1721
1722#if 0
1723static int
1724coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1725{
1726 AV *padlist;
1727 AV *av = (AV *)mg->mg_obj;
1728
1729 abort ();
1730
1731 return 0;
1732}
1733
1734static MGVTBL coro_gensub_vtbl = {
1735 0, 0, 0, 0,
1736 coro_gensub_free
1737};
1738#endif
1739
1740/*****************************************************************************/
1741/* PerlIO::cede */
1742
1743typedef struct
1744{
1745 PerlIOBuf base;
1746 NV next, every;
1747} PerlIOCede;
1748
1749static IV
1750PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1751{
1752 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1753
1754 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1755 self->next = nvtime () + self->every;
1756
1757 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1758}
1759
1760static SV *
1761PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1762{
1763 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1764
1765 return newSVnv (self->every);
1766}
1767
1768static IV
1769PerlIOCede_flush (pTHX_ PerlIO *f)
1770{
1771 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1772 double now = nvtime ();
1773
1774 if (now >= self->next)
1775 {
952 api_schedule (); 1776 api_cede ();
953} 1777 self->next = now + self->every;
1778 }
954 1779
1780 return PerlIOBuf_flush (aTHX_ f);
1781}
1782
1783static PerlIO_funcs PerlIO_cede =
1784{
1785 sizeof(PerlIO_funcs),
1786 "cede",
1787 sizeof(PerlIOCede),
1788 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1789 PerlIOCede_pushed,
1790 PerlIOBuf_popped,
1791 PerlIOBuf_open,
1792 PerlIOBase_binmode,
1793 PerlIOCede_getarg,
1794 PerlIOBase_fileno,
1795 PerlIOBuf_dup,
1796 PerlIOBuf_read,
1797 PerlIOBuf_unread,
1798 PerlIOBuf_write,
1799 PerlIOBuf_seek,
1800 PerlIOBuf_tell,
1801 PerlIOBuf_close,
1802 PerlIOCede_flush,
1803 PerlIOBuf_fill,
1804 PerlIOBase_eof,
1805 PerlIOBase_error,
1806 PerlIOBase_clearerr,
1807 PerlIOBase_setlinebuf,
1808 PerlIOBuf_get_base,
1809 PerlIOBuf_bufsiz,
1810 PerlIOBuf_get_ptr,
1811 PerlIOBuf_get_cnt,
1812 PerlIOBuf_set_ptrcnt,
1813};
1814
1815
955MODULE = Coro::State PACKAGE = Coro::State 1816MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956 1817
957PROTOTYPES: ENABLE 1818PROTOTYPES: DISABLE
958 1819
959BOOT: 1820BOOT:
960{ /* {} necessary for stoopid perl-5.6.x */ 1821{
961#ifdef USE_ITHREADS 1822#ifdef USE_ITHREADS
962 MUTEX_INIT (&coro_mutex); 1823 MUTEX_INIT (&coro_lock);
1824# if CORO_PTHREAD
1825 coro_thx = PERL_GET_CONTEXT;
963#endif 1826# endif
1827#endif
1828 BOOT_PAGESIZE;
964 1829
965 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1830 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
966 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1831 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1832
1833 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1834 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1835 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1836
1837 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1838 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1839 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1840
967 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1841 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
968 1842
969 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1843 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
970 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1844 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
971 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1845 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
972 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1846 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
973 1847
974 main_mainstack = PL_mainstack; 1848 main_mainstack = PL_mainstack;
1849 main_top_env = PL_top_env;
975 1850
1851 while (main_top_env->je_prev)
1852 main_top_env = main_top_env->je_prev;
1853
976 coroapi.ver = CORO_API_VERSION; 1854 coroapi.ver = CORO_API_VERSION;
1855 coroapi.rev = CORO_API_REVISION;
977 coroapi.transfer = api_transfer; 1856 coroapi.transfer = api_transfer;
978}
979 1857
980Coro::State 1858 {
981_newprocess(args) 1859 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
982 SV * args 1860
983 PROTOTYPE: $ 1861 if (!svp) croak ("Time::HiRes is required");
1862 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1863
1864 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1865 }
1866
1867 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1868}
1869
1870SV *
1871new (char *klass, ...)
984 CODE: 1872 CODE:
985 Coro__State coro; 1873{
1874 struct coro *coro;
1875 MAGIC *mg;
1876 HV *hv;
1877 int i;
986 1878
987 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
988 croak ("Coro::State::_newprocess expects an arrayref");
989
990 Newz (0, coro, 1, struct coro); 1879 Newz (0, coro, 1, struct coro);
1880 coro->args = newAV ();
1881 coro->flags = CF_NEW;
991 1882
992 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1883 if (coro_first) coro_first->prev = coro;
993 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1884 coro->next = coro_first;
994 /*coro->stack = 0;*/ 1885 coro_first = coro;
995 1886
996 /* same as JMPENV_BOOTSTRAP */ 1887 coro->hv = hv = newHV ();
997 /* we might be able to recycle start_env, but safe is safe */ 1888 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
998 /*Zero(&coro->start_env, 1, JMPENV);*/ 1889 mg->mg_flags |= MGf_DUP;
999 coro->start_env.je_ret = -1; 1890 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1000 coro->start_env.je_mustcatch = TRUE;
1001 1891
1002 RETVAL = coro; 1892 av_extend (coro->args, items - 1);
1893 for (i = 1; i < items; i++)
1894 av_push (coro->args, newSVsv (ST (i)));
1895}
1003 OUTPUT: 1896 OUTPUT:
1004 RETVAL 1897 RETVAL
1005 1898
1899# these not obviously related functions are all rolled into the same xs
1900# function to increase chances that they all will call transfer with the same
1901# stack offset
1006void 1902void
1007transfer(prev, next, flags) 1903_set_stacklevel (...)
1008 SV *prev 1904 ALIAS:
1009 SV *next 1905 Coro::State::transfer = 1
1010 int flags 1906 Coro::schedule = 2
1011 PROTOTYPE: @ 1907 Coro::cede = 3
1908 Coro::cede_notself = 4
1012 CODE: 1909 CODE:
1910{
1911 struct transfer_args ta;
1912
1013 PUTBACK; 1913 PUTBACK;
1014 SV_CORO (next, "Coro::transfer"); 1914 switch (ix)
1015 SV_CORO (prev, "Coro::transfer"); 1915 {
1016 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1916 case 0:
1917 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (ST (0)));
1918 break;
1919
1920 case 1:
1921 if (items != 2)
1922 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1923
1924 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1925 break;
1926
1927 case 2:
1928 prepare_schedule (aTHX_ &ta);
1929 break;
1930
1931 case 3:
1932 prepare_cede (aTHX_ &ta);
1933 break;
1934
1935 case 4:
1936 if (!prepare_cede_notself (aTHX_ &ta))
1937 XSRETURN_EMPTY;
1938
1939 break;
1940 }
1017 SPAGAIN; 1941 SPAGAIN;
1018 1942
1943 BARRIER;
1944 PUTBACK;
1945 TRANSFER (ta, 0);
1946 SPAGAIN; /* might be the sp of a different coroutine now */
1947 /* be extra careful not to ever do anything after TRANSFER */
1948}
1949
1950bool
1951_destroy (SV *coro_sv)
1952 CODE:
1953 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1954 OUTPUT:
1955 RETVAL
1956
1019void 1957void
1020DESTROY(coro)
1021 Coro::State coro
1022 CODE:
1023
1024 if (coro->mainstack && coro->mainstack != main_mainstack)
1025 {
1026 struct coro temp;
1027
1028 PUTBACK;
1029 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1030 LOAD (aTHX_ coro);
1031 SPAGAIN;
1032
1033 destroy_stacks (aTHX);
1034
1035 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1036 SPAGAIN;
1037
1038 coro->mainstack = 0;
1039 }
1040
1041 deallocate_stack (coro);
1042 SvREFCNT_dec (coro->args);
1043 Safefree (coro);
1044
1045void
1046_exit(code) 1958_exit (int code)
1047 int code
1048 PROTOTYPE: $ 1959 PROTOTYPE: $
1049 CODE: 1960 CODE:
1050 _exit (code); 1961 _exit (code);
1051 1962
1052MODULE = Coro::State PACKAGE = Coro::Cont 1963int
1964cctx_stacksize (int new_stacksize = 0)
1965 CODE:
1966 RETVAL = cctx_stacksize;
1967 if (new_stacksize)
1968 {
1969 cctx_stacksize = new_stacksize;
1970 ++cctx_gen;
1971 }
1972 OUTPUT:
1973 RETVAL
1053 1974
1054# this is slightly dirty (should expose a c-level api) 1975int
1976cctx_max_idle (int max_idle = 0)
1977 CODE:
1978 RETVAL = cctx_max_idle;
1979 if (max_idle > 1)
1980 cctx_max_idle = max_idle;
1981 OUTPUT:
1982 RETVAL
1983
1984int
1985cctx_count ()
1986 CODE:
1987 RETVAL = cctx_count;
1988 OUTPUT:
1989 RETVAL
1990
1991int
1992cctx_idle ()
1993 CODE:
1994 RETVAL = cctx_idle;
1995 OUTPUT:
1996 RETVAL
1055 1997
1056void 1998void
1057yield(...) 1999list ()
2000 PPCODE:
2001{
2002 struct coro *coro;
2003 for (coro = coro_first; coro; coro = coro->next)
2004 if (coro->hv)
2005 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2006}
2007
2008void
2009call (Coro::State coro, SV *coderef)
2010 ALIAS:
2011 eval = 1
2012 CODE:
2013{
2014 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2015 {
2016 struct coro temp;
2017
2018 if (!(coro->flags & CF_RUNNING))
2019 {
2020 PUTBACK;
2021 save_perl (aTHX_ &temp);
2022 load_perl (aTHX_ coro);
2023 }
2024
2025 {
2026 dSP;
2027 ENTER;
2028 SAVETMPS;
2029 PUTBACK;
2030 PUSHSTACK;
2031 PUSHMARK (SP);
2032
2033 if (ix)
2034 eval_sv (coderef, 0);
2035 else
2036 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2037
2038 POPSTACK;
2039 SPAGAIN;
2040 FREETMPS;
2041 LEAVE;
2042 PUTBACK;
2043 }
2044
2045 if (!(coro->flags & CF_RUNNING))
2046 {
2047 save_perl (aTHX_ coro);
2048 load_perl (aTHX_ &temp);
2049 SPAGAIN;
2050 }
2051 }
2052}
2053
2054SV *
2055is_ready (Coro::State coro)
2056 PROTOTYPE: $
2057 ALIAS:
2058 is_ready = CF_READY
2059 is_running = CF_RUNNING
2060 is_new = CF_NEW
2061 is_destroyed = CF_DESTROYED
2062 CODE:
2063 RETVAL = boolSV (coro->flags & ix);
2064 OUTPUT:
2065 RETVAL
2066
2067void
2068throw (Coro::State self, SV *throw = &PL_sv_undef)
1058 PROTOTYPE: @ 2069 PROTOTYPE: $;$
1059 CODE: 2070 CODE:
1060 SV *yieldstack; 2071 SvREFCNT_dec (self->throw);
1061 SV *sv; 2072 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1062 AV *defav = GvAV (PL_defgv);
1063 struct coro *prev, *next;
1064 2073
1065 yieldstack = *hv_fetch ( 2074void
1066 (HV *)SvRV (GvSV (coro_current)), 2075api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1067 "yieldstack", sizeof ("yieldstack") - 1, 2076
2077SV *
2078has_cctx (Coro::State coro)
2079 PROTOTYPE: $
2080 CODE:
2081 RETVAL = boolSV (!!coro->cctx);
2082 OUTPUT:
2083 RETVAL
2084
2085int
2086is_traced (Coro::State coro)
2087 PROTOTYPE: $
2088 CODE:
2089 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2090 OUTPUT:
2091 RETVAL
2092
2093UV
2094rss (Coro::State coro)
2095 PROTOTYPE: $
2096 ALIAS:
2097 usecount = 1
2098 CODE:
2099 switch (ix)
2100 {
2101 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2102 case 1: RETVAL = coro->usecount; break;
1068 0 2103 }
2104 OUTPUT:
2105 RETVAL
2106
2107void
2108force_cctx ()
2109 CODE:
2110 struct coro *coro = SvSTATE (coro_current);
2111 coro->cctx->idle_sp = 0;
2112
2113void
2114swap_defsv (Coro::State self)
2115 PROTOTYPE: $
2116 ALIAS:
2117 swap_defav = 1
2118 CODE:
2119 if (!self->slot)
2120 croak ("cannot swap state with coroutine that has no saved state");
2121 else
1069 ); 2122 {
2123 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2124 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1070 2125
1071 /* set up @_ -- ugly */ 2126 SV *tmp = *src; *src = *dst; *dst = tmp;
1072 av_clear (defav); 2127 }
1073 av_fill (defav, items - 1);
1074 while (items--)
1075 av_store (defav, items, SvREFCNT_inc (ST(items)));
1076
1077 sv = av_pop ((AV *)SvRV (yieldstack));
1078 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1079 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1080 SvREFCNT_dec (sv);
1081
1082 transfer (aTHX_ prev, next, 0);
1083 2128
1084MODULE = Coro::State PACKAGE = Coro 2129MODULE = Coro::State PACKAGE = Coro
1085 2130
1086# this is slightly dirty (should expose a c-level api)
1087
1088BOOT: 2131BOOT:
1089{ 2132{
1090 int i; 2133 int i;
2134
2135 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2136 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2137 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2138
2139 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2140 SvREADONLY_on (coro_current);
2141
1091 HV *stash = gv_stashpv ("Coro", TRUE); 2142 coro_stash = gv_stashpv ("Coro", TRUE);
1092 2143
1093 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2144 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1094 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2145 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1095 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2146 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1096 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2147 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1097 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2148 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1098 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2149 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1099
1100 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1101 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1102 2150
1103 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2151 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1104 coro_ready[i] = newAV (); 2152 coro_ready[i] = newAV ();
1105 2153
1106 { 2154 {
1107 SV *sv = perl_get_sv("Coro::API", 1); 2155 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1108 2156
1109 coroapi.schedule = api_schedule; 2157 coroapi.schedule = api_schedule;
1110 coroapi.cede = api_cede; 2158 coroapi.cede = api_cede;
2159 coroapi.cede_notself = api_cede_notself;
1111 coroapi.ready = api_ready; 2160 coroapi.ready = api_ready;
2161 coroapi.is_ready = api_is_ready;
1112 coroapi.nready = &coro_nready; 2162 coroapi.nready = &coro_nready;
1113 coroapi.current = coro_current; 2163 coroapi.current = coro_current;
1114 2164
1115 GCoroAPI = &coroapi; 2165 GCoroAPI = &coroapi;
1116 sv_setiv(sv, (IV)&coroapi); 2166 sv_setiv (sv, (IV)&coroapi);
1117 SvREADONLY_on(sv); 2167 SvREADONLY_on (sv);
1118 } 2168 }
1119} 2169}
1120 2170
1121#if !PERL_MICRO
1122
1123void 2171void
1124ready(self) 2172_set_current (SV *current)
1125 SV * self
1126 PROTOTYPE: $ 2173 PROTOTYPE: $
1127 CODE: 2174 CODE:
1128 api_ready (self); 2175 SvREFCNT_dec (SvRV (coro_current));
2176 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1129 2177
1130#endif 2178void
2179_set_readyhook (SV *hook)
2180 PROTOTYPE: $
2181 CODE:
2182 LOCK;
2183 SvREFCNT_dec (coro_readyhook);
2184 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2185 UNLOCK;
1131 2186
1132int 2187int
2188prio (Coro::State coro, int newprio = 0)
2189 ALIAS:
2190 nice = 1
2191 CODE:
2192{
2193 RETVAL = coro->prio;
2194
2195 if (items > 1)
2196 {
2197 if (ix)
2198 newprio = coro->prio - newprio;
2199
2200 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2201 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2202
2203 coro->prio = newprio;
2204 }
2205}
2206 OUTPUT:
2207 RETVAL
2208
2209SV *
2210ready (SV *self)
2211 PROTOTYPE: $
2212 CODE:
2213 RETVAL = boolSV (api_ready (self));
2214 OUTPUT:
2215 RETVAL
2216
2217int
1133nready(...) 2218nready (...)
1134 PROTOTYPE: 2219 PROTOTYPE:
1135 CODE: 2220 CODE:
1136 RETVAL = coro_nready; 2221 RETVAL = coro_nready;
1137 OUTPUT: 2222 OUTPUT:
1138 RETVAL 2223 RETVAL
1139 2224
2225# for async_pool speedup
1140void 2226void
1141schedule(...) 2227_pool_1 (SV *cb)
1142 PROTOTYPE:
1143 CODE: 2228 CODE:
1144 api_schedule (); 2229{
2230 struct coro *coro = SvSTATE (coro_current);
2231 HV *hv = (HV *)SvRV (coro_current);
2232 AV *defav = GvAV (PL_defgv);
2233 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2234 AV *invoke_av;
2235 int i, len;
2236
2237 if (!invoke)
2238 {
2239 SV *old = PL_diehook;
2240 PL_diehook = 0;
2241 SvREFCNT_dec (old);
2242 croak ("\3async_pool terminate\2\n");
2243 }
2244
2245 SvREFCNT_dec (coro->saved_deffh);
2246 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2247
2248 hv_store (hv, "desc", sizeof ("desc") - 1,
2249 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2250
2251 invoke_av = (AV *)SvRV (invoke);
2252 len = av_len (invoke_av);
2253
2254 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2255
2256 if (len > 0)
2257 {
2258 av_fill (defav, len - 1);
2259 for (i = 0; i < len; ++i)
2260 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2261 }
2262
2263 SvREFCNT_dec (invoke);
2264}
1145 2265
1146void 2266void
1147cede(...) 2267_pool_2 (SV *cb)
1148 PROTOTYPE:
1149 CODE: 2268 CODE:
1150 api_cede (); 2269{
2270 struct coro *coro = SvSTATE (coro_current);
1151 2271
1152# and these are hacks 2272 sv_setsv (cb, &PL_sv_undef);
2273
2274 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2275 coro->saved_deffh = 0;
2276
2277 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2278 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2279 {
2280 SV *old = PL_diehook;
2281 PL_diehook = 0;
2282 SvREFCNT_dec (old);
2283 croak ("\3async_pool terminate\2\n");
2284 }
2285
2286 av_clear (GvAV (PL_defgv));
2287 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2288 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2289
2290 coro->prio = 0;
2291
2292 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2293 api_trace (coro_current, 0);
2294
2295 av_push (av_async_pool, newSVsv (coro_current));
2296}
2297
2298#if 0
2299
2300void
2301_generator_call (...)
2302 PROTOTYPE: @
2303 PPCODE:
2304 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2305 xxxx
2306 abort ();
2307
1153SV * 2308SV *
1154_aio_get_state () 2309gensub (SV *sub, ...)
1155 CODE: 2310 PROTOTYPE: &;@
2311 CODE:
1156{ 2312{
1157 struct { 2313 struct coro *coro;
1158 int errorno; 2314 MAGIC *mg;
1159 int laststype; 2315 CV *xcv;
1160 int laststatval; 2316 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1161 Stat_t statcache; 2317 int i;
1162 } data;
1163 2318
1164 data.errorno = errno; 2319 CvGV (ncv) = CvGV (cv);
1165 data.laststype = PL_laststype; 2320 CvFILE (ncv) = CvFILE (cv);
1166 data.laststatval = PL_laststatval;
1167 data.statcache = PL_statcache;
1168 2321
1169 RETVAL = newSVpvn ((char *)&data, sizeof data); 2322 Newz (0, coro, 1, struct coro);
2323 coro->args = newAV ();
2324 coro->flags = CF_NEW;
2325
2326 av_extend (coro->args, items - 1);
2327 for (i = 1; i < items; i++)
2328 av_push (coro->args, newSVsv (ST (i)));
2329
2330 CvISXSUB_on (ncv);
2331 CvXSUBANY (ncv).any_ptr = (void *)coro;
2332
2333 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2334
2335 CvXSUB (ncv) = CvXSUB (xcv);
2336 CvANON_on (ncv);
2337
2338 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2339 RETVAL = newRV_noinc ((SV *)ncv);
1170} 2340}
1171 OUTPUT: 2341 OUTPUT:
1172 RETVAL 2342 RETVAL
1173 2343
2344#endif
2345
2346
2347MODULE = Coro::State PACKAGE = Coro::AIO
2348
1174void 2349void
1175_aio_set_state (char *data_) 2350_get_state (SV *self)
2351 PPCODE:
2352{
2353 AV *defav = GvAV (PL_defgv);
2354 AV *av = newAV ();
2355 int i;
2356 SV *data_sv = newSV (sizeof (struct io_state));
2357 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2358 SvCUR_set (data_sv, sizeof (struct io_state));
2359 SvPOK_only (data_sv);
2360
2361 data->errorno = errno;
2362 data->laststype = PL_laststype;
2363 data->laststatval = PL_laststatval;
2364 data->statcache = PL_statcache;
2365
2366 av_extend (av, AvFILLp (defav) + 1 + 1);
2367
2368 for (i = 0; i <= AvFILLp (defav); ++i)
2369 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2370
2371 av_push (av, data_sv);
2372
2373 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2374
2375 api_ready (self);
2376}
2377
2378void
2379_set_state (SV *state)
1176 PROTOTYPE: $ 2380 PROTOTYPE: $
2381 PPCODE:
2382{
2383 AV *av = (AV *)SvRV (state);
2384 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2385 int i;
2386
2387 errno = data->errorno;
2388 PL_laststype = data->laststype;
2389 PL_laststatval = data->laststatval;
2390 PL_statcache = data->statcache;
2391
2392 EXTEND (SP, AvFILLp (av));
2393 for (i = 0; i < AvFILLp (av); ++i)
2394 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2395}
2396
2397
2398MODULE = Coro::State PACKAGE = Coro::AnyEvent
2399
2400BOOT:
2401 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2402
2403SV *
2404_schedule (...)
2405 PROTOTYPE: @
1177 CODE: 2406 CODE:
1178{ 2407{
1179 struct { 2408 static int incede;
1180 int errorno;
1181 int laststype;
1182 int laststatval;
1183 Stat_t statcache;
1184 } *data = (void *)data_;
1185 2409
1186 errno = data->errorno; 2410 api_cede_notself ();
1187 PL_laststype = data->laststype; 2411
1188 PL_laststatval = data->laststatval; 2412 ++incede;
1189 PL_statcache = data->statcache; 2413 while (coro_nready >= incede && api_cede ())
2414 ;
2415
2416 sv_setsv (sv_activity, &PL_sv_undef);
2417 if (coro_nready >= incede)
2418 {
2419 PUSHMARK (SP);
2420 PUTBACK;
2421 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2422 SPAGAIN;
2423 }
2424
2425 --incede;
1190} 2426}
2427
2428
2429MODULE = Coro::State PACKAGE = PerlIO::cede
2430
2431BOOT:
2432 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2433

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