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Comparing Coro/Coro/State.xs (file contents):
Revision 1.73 by root, Sat Feb 4 06:01:13 2006 UTC vs.
Revision 1.252 by root, Tue Nov 4 12:08:44 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# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 66# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 67# define PL_ppaddr ppaddr
14# endif 68# endif
15# ifndef call_sv 69# ifndef call_sv
16# define call_sv perl_call_sv 70# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 81# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
29# endif 83# endif
30#endif 84#endif
31 85
32#include <errno.h> 86/* 5.11 */
33#include <signal.h> 87#ifndef CxHASARGS
34 88# 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
44# endif 89#endif
45#endif
46 90
47#define SUB_INIT "Coro::State::initialize" 91/* 5.10.0 */
48#define UCORO_STATE "_coro_state" 92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
49 95
50/* The next macro should declare a variable stacklevel that contains and approximation 96/* 5.8.8 */
51 * to the current C stack pointer. Its property is that it changes with each call 97#ifndef GV_NOTQUAL
52 * and should be unique. */ 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
53#define dSTACKLEVEL void *stacklevel = &stacklevel 125#define STACKLEVEL ((void *)&stacklevel)
54 126
55#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
56 128
57#define labs(l) ((l) >= 0 ? (l) : -(l)) 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))
58 143
59#include "CoroAPI.h" 144#include "CoroAPI.h"
60 145
61#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
62static perl_mutex coro_mutex; 147static perl_mutex coro_mutex;
… …
65#else 150#else
66# define LOCK (void)0 151# define LOCK (void)0
67# define UNLOCK (void)0 152# define UNLOCK (void)0
68#endif 153#endif
69 154
155/* helper storage struct for Coro::AIO */
156struct io_state
157{
158 AV *res;
159 int errorno;
160 I32 laststype;
161 int laststatval;
162 Stat_t statcache;
163};
164
165static double (*nvtime)(); /* so why doesn't it take void? */
166
167static size_t coro_stacksize = CORO_STACKSIZE;
70static struct CoroAPI coroapi; 168static struct CoroAPI coroapi;
71static AV *main_mainstack; /* used to differentiate between $main and others */ 169static AV *main_mainstack; /* used to differentiate between $main and others */
170static JMPENV *main_top_env;
72static HV *coro_state_stash; 171static 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 */ 172static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
76 173
77/* this is actually not only the c stack but also c registers etc... */ 174static GV *irsgv; /* $/ */
175static GV *stdoutgv; /* *STDOUT */
176static SV *rv_diehook;
177static SV *rv_warnhook;
178static HV *hv_sig; /* %SIG */
179
180/* async_pool helper stuff */
181static SV *sv_pool_rss;
182static SV *sv_pool_size;
183static AV *av_async_pool;
184
185/* Coro::AnyEvent */
186static SV *sv_activity;
187
188static struct coro_cctx *cctx_first;
189static int cctx_count, cctx_idle;
190
191enum {
192 CC_MAPPED = 0x01,
193 CC_NOREUSE = 0x02, /* throw this away after tracing */
194 CC_TRACE = 0x04,
195 CC_TRACE_SUB = 0x08, /* trace sub calls */
196 CC_TRACE_LINE = 0x10, /* trace each statement */
197 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
198};
199
200/* this is a structure representing a c-level coroutine */
201typedef struct coro_cctx {
202 struct coro_cctx *next;
203
204 /* the stack */
205 void *sptr;
206 size_t ssize;
207
208 /* cpu state */
209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
211 JMPENV *top_env;
212 coro_context cctx;
213
214#if CORO_USE_VALGRIND
215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
78typedef struct { 228typedef struct {
79 int refcnt; /* pointer reference counter */ 229 SV *defsv;
80 int usecnt; /* shared by how many coroutines */ 230 AV *defav;
81 int gencnt; /* generation counter */ 231 SV *errsv;
232 SV *irsgv;
233#define VAR(name,type) type name;
234# include "state.h"
235#undef VAR
236} perl_slots;
82 237
83 coro_context cctx; 238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
84 239
85 void *sptr; 240/* this is a structure representing a perl-level coroutine */
86 long ssize; /* positive == mmap, otherwise malloc */
87} coro_stack;
88
89struct coro { 241struct coro {
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 242 /* the c coroutine allocated to this perl coroutine, if any */
91 JMPENV start_env; 243 coro_cctx *cctx;
92 244
93 /* the optional C context */ 245 /* 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; 246 AV *mainstack;
111 SV **stack_sp; 247 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;
137 248
138 /* data associated with this coroutine (initial args) */ 249 AV *args; /* data associated with this coroutine (initial args) */
139 AV *args; 250 int refcnt; /* coroutines are refcounted, yes */
251 int flags; /* CF_ flags */
252 HV *hv; /* the perl hash associated with this coro, if any */
253
254 /* statistics */
255 int usecount; /* number of transfers to this coro */
256
257 /* coro process data */
258 int prio;
259 SV *throw; /* exception to be thrown */
260
261 /* async_pool */
262 SV *saved_deffh;
263
264 /* linked list */
265 struct coro *next, *prev;
140}; 266};
141 267
142typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
144 270
145/* mostly copied from op.c:cv_clone2 */ 271/** Coro ********************************************************************/
146STATIC AV * 272
147clone_padlist (pTHX_ AV *protopadlist) 273#define PRIO_MAX 3
274#define PRIO_HIGH 1
275#define PRIO_NORMAL 0
276#define PRIO_LOW -1
277#define PRIO_IDLE -3
278#define PRIO_MIN -4
279
280/* for Coro.pm */
281static SV *coro_current;
282static SV *coro_readyhook;
283static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
284static int coro_nready;
285static struct coro *coro_first;
286
287/** lowlevel stuff **********************************************************/
288
289static SV *
290coro_get_sv (pTHX_ const char *name, int create)
148{ 291{
149 AV *av; 292#if PERL_VERSION_ATLEAST (5,10,0)
150 I32 ix; 293 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 294 get_sv (name, create);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 295#endif
153 SV **pname = AvARRAY (protopad_name); 296 return get_sv (name, create);
154 SV **ppad = AvARRAY (protopad); 297}
155 I32 fname = AvFILLp (protopad_name); 298
156 I32 fpad = AvFILLp (protopad); 299static AV *
300coro_get_av (pTHX_ const char *name, int create)
301{
302#if PERL_VERSION_ATLEAST (5,10,0)
303 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
304 get_av (name, create);
305#endif
306 return get_av (name, create);
307}
308
309static HV *
310coro_get_hv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_hv (name, create);
315#endif
316 return get_hv (name, create);
317}
318
319static AV *
320coro_clone_padlist (pTHX_ CV *cv)
321{
322 AV *padlist = CvPADLIST (cv);
157 AV *newpadlist, *newpad_name, *newpad; 323 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);
167 324
168 newpadlist = newAV (); 325 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 326 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 327#if PERL_VERSION_ATLEAST (5,10,0)
328 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
329#else
330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
331#endif
332 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
333 --AvFILLp (padlist);
334
335 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
171 av_store (newpadlist, 1, (SV *) newpad); 336 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 AvREIFY_on (av);
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
241 337
242 return newpadlist; 338 return newpadlist;
243} 339}
244 340
245STATIC void 341static void
246free_padlist (pTHX_ AV *padlist) 342free_padlist (pTHX_ AV *padlist)
247{ 343{
248 /* may be during global destruction */ 344 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 345 if (SvREFCNT (padlist))
250 { 346 {
… …
264 360
265 SvREFCNT_dec ((SV*)padlist); 361 SvREFCNT_dec ((SV*)padlist);
266 } 362 }
267} 363}
268 364
269STATIC int 365static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 366coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 367{
272 AV *padlist; 368 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 369 AV *av = (AV *)mg->mg_obj;
274 370
275 /* casting is fun. */ 371 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 372 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 373 free_padlist (aTHX_ padlist);
278 374
279 SvREFCNT_dec (av); 375 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280}
281 376
377 return 0;
378}
379
282#define PERL_MAGIC_coro PERL_MAGIC_ext 380#define CORO_MAGIC_type_cv PERL_MAGIC_ext
381#define CORO_MAGIC_type_state PERL_MAGIC_ext
283 382
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 383static MGVTBL coro_cv_vtbl = {
384 0, 0, 0, 0,
385 coro_cv_free
386};
387
388#define CORO_MAGIC(sv,type) \
389 SvMAGIC (sv) \
390 ? SvMAGIC (sv)->mg_type == type \
391 ? SvMAGIC (sv) \
392 : mg_find (sv, type) \
393 : 0
394
395#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
396#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
397
398static struct coro *
399SvSTATE_ (pTHX_ SV *coro)
400{
401 HV *stash;
402 MAGIC *mg;
403
404 if (SvROK (coro))
405 coro = SvRV (coro);
406
407 if (expect_false (SvTYPE (coro) != SVt_PVHV))
408 croak ("Coro::State object required");
409
410 stash = SvSTASH (coro);
411 if (expect_false (stash != coro_stash && stash != coro_state_stash))
412 {
413 /* very slow, but rare, check */
414 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
415 croak ("Coro::State object required");
416 }
417
418 mg = CORO_MAGIC_state (coro);
419 return (struct coro *)mg->mg_ptr;
420}
421
422#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
285 423
286/* the next two functions merely cache the padlists */ 424/* the next two functions merely cache the padlists */
287STATIC void 425static void
288get_padlist (pTHX_ CV *cv) 426get_padlist (pTHX_ CV *cv)
289{ 427{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 428 MAGIC *mg = CORO_MAGIC_cv (cv);
429 AV *av;
291 430
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 431 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 432 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 433 else
434 {
435#if CORO_PREFER_PERL_FUNCTIONS
436 /* this is probably cleaner? but also slower! */
437 /* in practise, it seems to be less stable */
438 CV *cp = Perl_cv_clone (cv);
439 CvPADLIST (cv) = CvPADLIST (cp);
440 CvPADLIST (cp) = 0;
441 SvREFCNT_dec (cp);
442#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 443 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
444#endif
445 }
296} 446}
297 447
298STATIC void 448static void
299put_padlist (pTHX_ CV *cv) 449put_padlist (pTHX_ CV *cv)
300{ 450{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 451 MAGIC *mg = CORO_MAGIC_cv (cv);
452 AV *av;
302 453
303 if (!mg) 454 if (expect_false (!mg))
304 { 455 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 }
310 456
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 457 av = (AV *)mg->mg_obj;
312}
313 458
314#define SB do { 459 if (expect_false (AvFILLp (av) >= AvMAX (av)))
315#define SE } while (0) 460 av_extend (av, AvMAX (av) + 1);
316 461
317#define LOAD(state) load_state(aTHX_ (state)); 462 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 463}
319 464
320#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 465/** load & save, init *******************************************************/
321 466
322static void 467static void
323load_state(pTHX_ Coro__State c) 468load_perl (pTHX_ Coro__State c)
324{ 469{
325 PL_dowarn = c->dowarn; 470 perl_slots *slot = c->slot;
326 PL_in_eval = c->in_eval; 471 c->slot = 0;
327 472
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack; 473 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#if PERL_VERSION < 9
352 PL_retstack = c->retstack;
353 PL_retstack_ix = c->retstack_ix;
354 PL_retstack_max = c->retstack_max;
355#endif
356 PL_curpm = c->curpm;
357 PL_curcop = c->curcop;
358 PL_top_env = c->top_env;
359 474
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 475 GvSV (PL_defgv) = slot->defsv;
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 476 GvAV (PL_defgv) = slot->defav;
362 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 477 GvSV (PL_errgv) = slot->errsv;
478 GvSV (irsgv) = slot->irsgv;
479
480 #define VAR(name,type) PL_ ## name = slot->name;
481 # include "state.h"
482 #undef VAR
363 483
364 { 484 {
365 dSP; 485 dSP;
486
366 CV *cv; 487 CV *cv;
367 488
368 /* now do the ugly restore mess */ 489 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 490 while (expect_true (cv = (CV *)POPs))
370 { 491 {
371 AV *padlist = (AV *)POPs;
372
373 if (padlist)
374 {
375 put_padlist (aTHX_ cv); /* mark this padlist as available */ 492 put_padlist (aTHX_ cv); /* mark this padlist as available */
376 CvPADLIST(cv) = padlist; 493 CvDEPTH (cv) = PTR2IV (POPs);
377 } 494 CvPADLIST (cv) = (AV *)POPs;
378
379 ++CvDEPTH(cv);
380 } 495 }
381 496
382 PUTBACK; 497 PUTBACK;
383 } 498 }
384} 499}
385 500
386static void 501static void
387save_state(pTHX_ Coro__State c, int flags) 502save_perl (pTHX_ Coro__State c)
388{ 503{
389 { 504 {
390 dSP; 505 dSP;
391 I32 cxix = cxstack_ix; 506 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 507 PERL_CONTEXT *ccstk = cxstack;
… …
395 /* 510 /*
396 * the worst thing you can imagine happens first - we have to save 511 * the worst thing you can imagine happens first - we have to save
397 * (and reinitialize) all cv's in the whole callchain :( 512 * (and reinitialize) all cv's in the whole callchain :(
398 */ 513 */
399 514
400 PUSHs (Nullsv); 515 XPUSHs (Nullsv);
401 /* this loop was inspired by pp_caller */ 516 /* this loop was inspired by pp_caller */
402 for (;;) 517 for (;;)
403 { 518 {
404 while (cxix >= 0) 519 while (expect_true (cxix >= 0))
405 { 520 {
406 PERL_CONTEXT *cx = &ccstk[cxix--]; 521 PERL_CONTEXT *cx = &ccstk[cxix--];
407 522
408 if (CxTYPE(cx) == CXt_SUB) 523 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
409 { 524 {
410 CV *cv = cx->blk_sub.cv; 525 CV *cv = cx->blk_sub.cv;
526
411 if (CvDEPTH(cv)) 527 if (expect_true (CvDEPTH (cv)))
412 { 528 {
413 EXTEND (SP, CvDEPTH(cv)*2); 529 EXTEND (SP, 3);
414
415 while (--CvDEPTH(cv))
416 {
417 /* this tells the restore code to increment CvDEPTH */
418 PUSHs (Nullsv);
419 PUSHs ((SV *)cv);
420 }
421
422 PUSHs ((SV *)CvPADLIST(cv)); 530 PUSHs ((SV *)CvPADLIST (cv));
531 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
423 PUSHs ((SV *)cv); 532 PUSHs ((SV *)cv);
424 533
534 CvDEPTH (cv) = 0;
425 get_padlist (aTHX_ cv); /* this is a monster */ 535 get_padlist (aTHX_ cv);
426 } 536 }
427 } 537 }
428#ifdef CXt_FORMAT
429 else if (CxTYPE(cx) == CXt_FORMAT)
430 {
431 /* I never used formats, so how should I know how these are implemented? */
432 /* my bold guess is as a simple, plain sub... */
433 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434 }
435#endif
436 } 538 }
437 539
438 if (top_si->si_type == PERLSI_MAIN) 540 if (expect_true (top_si->si_type == PERLSI_MAIN))
439 break; 541 break;
440 542
441 top_si = top_si->si_prev; 543 top_si = top_si->si_prev;
442 ccstk = top_si->si_cxstack; 544 ccstk = top_si->si_cxstack;
443 cxix = top_si->si_cxix; 545 cxix = top_si->si_cxix;
444 } 546 }
445 547
446 PUTBACK; 548 PUTBACK;
447 } 549 }
448 550
449 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 551 /* allocate some space on the context stack for our purposes */
450 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 552 /* we manually unroll here, as usually 2 slots is enough */
451 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 553 if (SLOT_COUNT >= 1) CXINC;
554 if (SLOT_COUNT >= 2) CXINC;
555 if (SLOT_COUNT >= 3) CXINC;
556 {
557 int i;
558 for (i = 3; i < SLOT_COUNT; ++i)
559 CXINC;
560 }
561 cxstack_ix -= SLOT_COUNT; /* undo allocation */
452 562
453 c->dowarn = PL_dowarn;
454 c->in_eval = PL_in_eval;
455
456 c->curstackinfo = PL_curstackinfo;
457 c->curstack = PL_curstack;
458 c->mainstack = PL_mainstack; 563 c->mainstack = PL_mainstack;
459 c->stack_sp = PL_stack_sp; 564
460 c->op = PL_op; 565 {
461 c->curpad = PL_curpad; 566 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
462 c->comppad = PL_comppad; 567
463 c->compcv = PL_compcv; 568 slot->defav = GvAV (PL_defgv);
464 c->stack_base = PL_stack_base; 569 slot->defsv = DEFSV;
465 c->stack_max = PL_stack_max; 570 slot->errsv = ERRSV;
466 c->tmps_stack = PL_tmps_stack; 571 slot->irsgv = GvSV (irsgv);
467 c->tmps_floor = PL_tmps_floor; 572
468 c->tmps_ix = PL_tmps_ix; 573 #define VAR(name,type) slot->name = PL_ ## name;
469 c->tmps_max = PL_tmps_max; 574 # include "state.h"
470 c->markstack = PL_markstack; 575 #undef VAR
471 c->markstack_ptr = PL_markstack_ptr; 576 }
472 c->markstack_max = PL_markstack_max;
473 c->scopestack = PL_scopestack;
474 c->scopestack_ix = PL_scopestack_ix;
475 c->scopestack_max = PL_scopestack_max;
476 c->savestack = PL_savestack;
477 c->savestack_ix = PL_savestack_ix;
478 c->savestack_max = PL_savestack_max;
479#if PERL_VERSION < 9
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483#endif
484 c->curpm = PL_curpm;
485 c->curcop = PL_curcop;
486 c->top_env = PL_top_env;
487} 577}
488 578
489/* 579/*
490 * allocate various perl stacks. This is an exact copy 580 * allocate various perl stacks. This is an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 581 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 582 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 583 * not usually need a lot of stackspace.
494 */ 584 */
495STATIC void 585#if CORO_PREFER_PERL_FUNCTIONS
586# define coro_init_stacks init_stacks
587#else
588static void
496coro_init_stacks (pTHX) 589coro_init_stacks (pTHX)
497{ 590{
498 LOCK; 591 PL_curstackinfo = new_stackinfo(32, 8);
499
500 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501 PL_curstackinfo->si_type = PERLSI_MAIN; 592 PL_curstackinfo->si_type = PERLSI_MAIN;
502 PL_curstack = PL_curstackinfo->si_stack; 593 PL_curstack = PL_curstackinfo->si_stack;
503 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 594 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504 595
505 PL_stack_base = AvARRAY(PL_curstack); 596 PL_stack_base = AvARRAY(PL_curstack);
506 PL_stack_sp = PL_stack_base; 597 PL_stack_sp = PL_stack_base;
507 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 598 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508 599
509 New(50,PL_tmps_stack,96,SV*); 600 New(50,PL_tmps_stack,32,SV*);
510 PL_tmps_floor = -1; 601 PL_tmps_floor = -1;
511 PL_tmps_ix = -1; 602 PL_tmps_ix = -1;
512 PL_tmps_max = 96; 603 PL_tmps_max = 32;
513 604
514 New(54,PL_markstack,16,I32); 605 New(54,PL_markstack,16,I32);
515 PL_markstack_ptr = PL_markstack; 606 PL_markstack_ptr = PL_markstack;
516 PL_markstack_max = PL_markstack + 16; 607 PL_markstack_max = PL_markstack + 16;
517 608
518#ifdef SET_MARK_OFFSET 609#ifdef SET_MARK_OFFSET
519 SET_MARK_OFFSET; 610 SET_MARK_OFFSET;
520#endif 611#endif
521 612
522 New(54,PL_scopestack,16,I32); 613 New(54,PL_scopestack,8,I32);
523 PL_scopestack_ix = 0; 614 PL_scopestack_ix = 0;
524 PL_scopestack_max = 16; 615 PL_scopestack_max = 8;
525 616
526 New(54,PL_savestack,96,ANY); 617 New(54,PL_savestack,24,ANY);
527 PL_savestack_ix = 0; 618 PL_savestack_ix = 0;
528 PL_savestack_max = 96; 619 PL_savestack_max = 24;
529 620
530#if PERL_VERSION < 9 621#if !PERL_VERSION_ATLEAST (5,10,0)
531 New(54,PL_retstack,8,OP*); 622 New(54,PL_retstack,4,OP*);
532 PL_retstack_ix = 0; 623 PL_retstack_ix = 0;
533 PL_retstack_max = 8; 624 PL_retstack_max = 4;
534#endif 625#endif
535
536 UNLOCK;
537} 626}
627#endif
538 628
539/* 629/*
540 * destroy the stacks, the callchain etc... 630 * destroy the stacks, the callchain etc...
541 */ 631 */
542STATIC void 632static void
543destroy_stacks(pTHX) 633coro_destroy_stacks (pTHX)
544{ 634{
545 if (!IN_DESTRUCT)
546 {
547 /* is this ugly, I ask? */
548 LEAVE_SCOPE (0);
549
550 /* sure it is, but more important: is it correct?? :/ */
551 FREETMPS;
552
553 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
554 }
555
556 while (PL_curstackinfo->si_next) 635 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 636 PL_curstackinfo = PL_curstackinfo->si_next;
558 637
559 while (PL_curstackinfo) 638 while (PL_curstackinfo)
560 { 639 {
561 PERL_SI *p = PL_curstackinfo->si_prev; 640 PERL_SI *p = PL_curstackinfo->si_prev;
562 641
563 { /*D*//*remove*/
564 dSP;
565 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566 PUTBACK; /* possibly superfluous */
567 }
568
569 if (!IN_DESTRUCT) 642 if (!IN_DESTRUCT)
570 {
571 dounwind (-1);/*D*//*remove*/
572 SvREFCNT_dec (PL_curstackinfo->si_stack); 643 SvREFCNT_dec (PL_curstackinfo->si_stack);
573 }
574 644
575 Safefree (PL_curstackinfo->si_cxstack); 645 Safefree (PL_curstackinfo->si_cxstack);
576 Safefree (PL_curstackinfo); 646 Safefree (PL_curstackinfo);
577 PL_curstackinfo = p; 647 PL_curstackinfo = p;
578 } 648 }
579 649
580 Safefree (PL_tmps_stack); 650 Safefree (PL_tmps_stack);
581 Safefree (PL_markstack); 651 Safefree (PL_markstack);
582 Safefree (PL_scopestack); 652 Safefree (PL_scopestack);
583 Safefree (PL_savestack); 653 Safefree (PL_savestack);
584#if PERL_VERSION < 9 654#if !PERL_VERSION_ATLEAST (5,10,0)
585 Safefree (PL_retstack); 655 Safefree (PL_retstack);
586#endif 656#endif
587} 657}
588 658
659static size_t
660coro_rss (pTHX_ struct coro *coro)
661{
662 size_t rss = sizeof (*coro);
663
664 if (coro->mainstack)
665 {
666 perl_slots tmp_slot;
667 perl_slots *slot;
668
669 if (coro->flags & CF_RUNNING)
670 {
671 slot = &tmp_slot;
672
673 #define VAR(name,type) slot->name = PL_ ## name;
674 # include "state.h"
675 #undef VAR
676 }
677 else
678 slot = coro->slot;
679
680 if (slot)
681 {
682 rss += sizeof (slot->curstackinfo);
683 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
684 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
685 rss += slot->tmps_max * sizeof (SV *);
686 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
687 rss += slot->scopestack_max * sizeof (I32);
688 rss += slot->savestack_max * sizeof (ANY);
689
690#if !PERL_VERSION_ATLEAST (5,10,0)
691 rss += slot->retstack_max * sizeof (OP *);
692#endif
693 }
694 }
695
696 return rss;
697}
698
699/** coroutine stack handling ************************************************/
700
701static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
702static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
703static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
704
705/* apparently < 5.8.8 */
706#ifndef MgPV_nolen_const
707#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
708 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
709 (const char*)(mg)->mg_ptr)
710#endif
711
712/*
713 * This overrides the default magic get method of %SIG elements.
714 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
715 * and instead of tryign to save and restore the hash elements, we just provide
716 * readback here.
717 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
718 * not expecting this to actually change the hook. This is a potential problem
719 * when a schedule happens then, but we ignore this.
720 */
721static int
722coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
723{
724 const char *s = MgPV_nolen_const (mg);
725
726 if (*s == '_')
727 {
728 SV **svp = 0;
729
730 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
731 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
732
733 if (svp)
734 {
735 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
736 return 0;
737 }
738 }
739
740 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
741}
742
743static int
744coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 SV *old = *svp;
758 *svp = 0;
759 SvREFCNT_dec (old);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_set (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 = newSVsv (sv);
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
789}
790
589static void 791static void
590allocate_stack (Coro__State ctx, int alloc) 792coro_setup (pTHX_ struct coro *coro)
591{
592 coro_stack *stack;
593
594 New (0, stack, 1, coro_stack);
595
596 stack->refcnt = 1;
597 stack->usecnt = 1;
598 stack->gencnt = ctx->gencnt = 0;
599
600 if (alloc)
601 {
602#if HAVE_MMAP
603 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605 if (stack->sptr == (void *)-1)
606#endif
607 {
608 /*FIXME*//*D*//* reasonable stack size! */
609 stack->ssize = - (STACKSIZE * sizeof (long));
610 New (0, stack->sptr, STACKSIZE, long);
611 }
612 }
613 else
614 stack->sptr = 0;
615
616 ctx->stack = stack;
617}
618
619static void
620deallocate_stack (Coro__State ctx)
621{
622 coro_stack *stack = ctx->stack;
623
624 ctx->stack = 0;
625
626 if (stack)
627 {
628 if (!--stack->refcnt)
629 {
630#ifdef HAVE_MMAP
631 if (stack->ssize > 0 && stack->sptr)
632 munmap (stack->sptr, stack->ssize);
633 else
634#endif
635 Safefree (stack->sptr);
636
637 Safefree (stack);
638 }
639 else if (ctx->gencnt == stack->gencnt)
640 --stack->usecnt;
641 }
642}
643
644static void
645setup_coro (void *arg)
646{ 793{
647 /* 794 /*
648 * emulate part of the perl startup here. 795 * emulate part of the perl startup here.
649 */ 796 */
650 dTHX;
651 dSP;
652 Coro__State ctx = (Coro__State)arg;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654
655 coro_init_stacks (aTHX); 797 coro_init_stacks (aTHX);
656 /*PL_curcop = 0;*/ 798
657 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 799 PL_runops = RUNOPS_DEFAULT;
800 PL_curcop = &PL_compiling;
801 PL_in_eval = EVAL_NULL;
802 PL_comppad = 0;
803 PL_curpm = 0;
804 PL_curpad = 0;
805 PL_localizing = 0;
806 PL_dirty = 0;
807 PL_restartop = 0;
808#if PERL_VERSION_ATLEAST (5,10,0)
809 PL_parser = 0;
810#endif
811
812 /* recreate the die/warn hooks */
813 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
814 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
815
816 GvSV (PL_defgv) = newSV (0);
817 GvAV (PL_defgv) = coro->args; coro->args = 0;
818 GvSV (PL_errgv) = newSV (0);
819 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
820 PL_rs = newSVsv (GvSV (irsgv));
821 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
822
823 {
824 dSP;
825 LOGOP myop;
826
827 Zero (&myop, 1, LOGOP);
828 myop.op_next = Nullop;
829 myop.op_flags = OPf_WANT_VOID;
830
831 PUSHMARK (SP);
832 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
833 PUTBACK;
834 PL_op = (OP *)&myop;
835 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
836 SPAGAIN;
837 }
838
839 /* this newly created coroutine might be run on an existing cctx which most
840 * likely was suspended in set_stacklevel, called from entersub.
841 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
842 * so we ENTER here for symmetry
843 */
844 ENTER;
845}
846
847static void
848coro_destroy (pTHX_ struct coro *coro)
849{
850 if (!IN_DESTRUCT)
851 {
852 /* restore all saved variables and stuff */
853 LEAVE_SCOPE (0);
854 assert (PL_tmps_floor == -1);
855
856 /* free all temporaries */
857 FREETMPS;
858 assert (PL_tmps_ix == -1);
859
860 /* unwind all extra stacks */
861 POPSTACK_TO (PL_mainstack);
862
863 /* unwind main stack */
864 dounwind (-1);
865 }
866
867 SvREFCNT_dec (GvSV (PL_defgv));
658 SvREFCNT_dec (GvAV (PL_defgv)); 868 SvREFCNT_dec (GvAV (PL_defgv));
659 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 869 SvREFCNT_dec (GvSV (PL_errgv));
870 SvREFCNT_dec (PL_defoutgv);
871 SvREFCNT_dec (PL_rs);
872 SvREFCNT_dec (GvSV (irsgv));
660 873
661 SPAGAIN; 874 SvREFCNT_dec (PL_diehook);
875 SvREFCNT_dec (PL_warnhook);
876
877 SvREFCNT_dec (coro->saved_deffh);
878 SvREFCNT_dec (coro->throw);
662 879
663 if (ctx->stack) 880 coro_destroy_stacks (aTHX);
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP);
668 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671 if (SvTRUE (ERRSV))
672 croak (NULL);
673 else
674 croak ("FATAL: CCTXT coroutine returned!");
675 }
676 else
677 {
678 UNOP myop;
679
680 PL_op = (OP *)&myop;
681
682 Zero(&myop, 1, UNOP);
683 myop.op_next = Nullop;
684 myop.op_flags = OPf_WANT_VOID;
685
686 PUSHMARK(SP);
687 XPUSHs (sub_init);
688 /*
689 * the next line is slightly wrong, as PL_op->op_next
690 * is actually being executed so we skip the first op.
691 * that doesn't matter, though, since it is only
692 * pp_nextstate and we never return...
693 * ah yes, and I don't care anyways ;)
694 */
695 PUTBACK;
696 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697 SPAGAIN;
698
699 ENTER; /* necessary e.g. for dounwind */
700 }
701} 881}
702 882
703static void 883static void
704continue_coro (void *arg) 884free_coro_mortal (pTHX)
705{ 885{
706 /* 886 if (expect_true (coro_mortal))
707 * this is a _very_ stripped down perl interpreter ;) 887 {
708 */ 888 SvREFCNT_dec (coro_mortal);
709 dTHX; 889 coro_mortal = 0;
710 Coro__State ctx = (Coro__State)arg;
711 JMPENV coro_start_env;
712
713 PL_top_env = &ctx->start_env;
714
715 ctx->cursp = 0;
716 PL_op = PL_op->op_next;
717 CALLRUNOPS(aTHX);
718
719 abort ();
720}
721
722STATIC void
723transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724{
725 dSTACKLEVEL;
726
727 if (prev != next)
728 { 890 }
729 if (next->mainstack) 891}
892
893static int
894runops_trace (pTHX)
895{
896 COP *oldcop = 0;
897 int oldcxix = -2;
898 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
899 coro_cctx *cctx = coro->cctx;
900
901 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
902 {
903 PERL_ASYNC_CHECK ();
904
905 if (cctx->flags & CC_TRACE_ALL)
730 { 906 {
731 LOCK; 907 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
732 SAVE (prev, flags);
733 LOAD (next);
734 UNLOCK;
735
736 /* mark this state as in-use */
737 next->mainstack = 0;
738 next->tmps_ix = -2;
739
740 /* stacklevel changed? if yes, grab the stack for us! */
741 if (flags & TRANSFER_SAVE_CCTXT)
742 { 908 {
743 if (!prev->stack) 909 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
744 allocate_stack (prev, 0); 910 SV **bot, **top;
745 else if (prev->cursp != stacklevel 911 AV *av = newAV (); /* return values */
746 && prev->stack->usecnt > 1) 912 SV **cb;
913 dSP;
914
915 GV *gv = CvGV (cx->blk_sub.cv);
916 SV *fullname = sv_2mortal (newSV (0));
917 if (isGV (gv))
918 gv_efullname3 (fullname, gv, 0);
919
920 bot = PL_stack_base + cx->blk_oldsp + 1;
921 top = cx->blk_gimme == G_ARRAY ? SP + 1
922 : cx->blk_gimme == G_SCALAR ? bot + 1
923 : bot;
924
925 av_extend (av, top - bot);
926 while (bot < top)
927 av_push (av, SvREFCNT_inc_NN (*bot++));
928
929 PL_runops = RUNOPS_DEFAULT;
930 ENTER;
931 SAVETMPS;
932 EXTEND (SP, 3);
933 PUSHMARK (SP);
934 PUSHs (&PL_sv_no);
935 PUSHs (fullname);
936 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
937 PUTBACK;
938 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
939 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
940 SPAGAIN;
941 FREETMPS;
942 LEAVE;
943 PL_runops = runops_trace;
944 }
945
946 if (oldcop != PL_curcop)
947 {
948 oldcop = PL_curcop;
949
950 if (PL_curcop != &PL_compiling)
747 { 951 {
748 prev->gencnt = ++prev->stack->gencnt; 952 SV **cb;
749 prev->stack->usecnt = 1;
750 }
751 953
752 /* has our stack been invalidated? */ 954 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
753 if (next->stack && next->stack->gencnt != next->gencnt)
754 { 955 {
755 deallocate_stack (next); 956 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
756 allocate_stack (next, 1); 957
757 coro_create (&(next->stack->cctx), 958 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
758 continue_coro, (void *)next, 959 {
759 next->stack->sptr, labs (next->stack->ssize)); 960 runops_proc_t old_runops = PL_runops;
961 dSP;
962 GV *gv = CvGV (cx->blk_sub.cv);
963 SV *fullname = sv_2mortal (newSV (0));
964
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 PL_runops = RUNOPS_DEFAULT;
969 ENTER;
970 SAVETMPS;
971 EXTEND (SP, 3);
972 PUSHMARK (SP);
973 PUSHs (&PL_sv_yes);
974 PUSHs (fullname);
975 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
976 PUTBACK;
977 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
978 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
979 SPAGAIN;
980 FREETMPS;
981 LEAVE;
982 PL_runops = runops_trace;
983 }
984
985 oldcxix = cxstack_ix;
760 } 986 }
761 987
762 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 988 if (cctx->flags & CC_TRACE_LINE)
763 prev->cursp = stacklevel;
764 /* don't add any code here */
765 }
766 else
767 next->cursp = stacklevel;
768 }
769 else if (next->tmps_ix == -2)
770 croak ("tried to transfer to running coroutine");
771 else
772 {
773 LOCK;
774 SAVE (prev, -1); /* first get rid of the old state */
775 UNLOCK;
776
777 if (flags & TRANSFER_SAVE_CCTXT)
778 {
779 if (!prev->stack)
780 allocate_stack (prev, 0);
781
782 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783 { 989 {
784 PL_top_env = &next->start_env; 990 dSP;
785 991
786 setup_coro (next); 992 PL_runops = RUNOPS_DEFAULT;
787 next->cursp = stacklevel; 993 ENTER;
788 994 SAVETMPS;
789 prev->stack->refcnt++; 995 EXTEND (SP, 3);
790 prev->stack->usecnt++; 996 PL_runops = RUNOPS_DEFAULT;
791 next->stack = prev->stack; 997 PUSHMARK (SP);
792 next->gencnt = prev->gencnt; 998 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
999 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1000 PUTBACK;
1001 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_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;
793 } 1007 }
794 else
795 {
796 assert (!next->stack);
797 allocate_stack (next, 1);
798 coro_create (&(next->stack->cctx),
799 setup_coro, (void *)next,
800 next->stack->sptr, labs (next->stack->ssize));
801 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802 prev->cursp = stacklevel;
803 /* don't add any code here */
804 } 1008 }
805 } 1009 }
1010 }
1011 }
1012
1013 TAINT_NOT;
1014 return 0;
1015}
1016
1017/* inject a fake call to Coro::State::_cctx_init into the execution */
1018/* _cctx_init should be careful, as it could be called at almost any time */
1019/* during execution of a perl program */
1020static void NOINLINE
1021cctx_prepare (pTHX_ coro_cctx *cctx)
1022{
1023 dSP;
1024 LOGOP myop;
1025
1026 PL_top_env = &PL_start_env;
1027
1028 if (cctx->flags & CC_TRACE)
1029 PL_runops = runops_trace;
1030
1031 Zero (&myop, 1, LOGOP);
1032 myop.op_next = PL_op;
1033 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1034
1035 PUSHMARK (SP);
1036 EXTEND (SP, 2);
1037 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1038 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1039 PUTBACK;
1040 PL_op = (OP *)&myop;
1041 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1042 SPAGAIN;
1043}
1044
1045/*
1046 * this is a _very_ stripped down perl interpreter ;)
1047 */
1048static void
1049cctx_run (void *arg)
1050{
1051 dTHX;
1052
1053 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1054 UNLOCK;
1055
1056 /* we now skip the entersub that lead to transfer() */
1057 PL_op = PL_op->op_next;
1058
1059 /* inject a fake subroutine call to cctx_init */
1060 cctx_prepare (aTHX_ (coro_cctx *)arg);
1061
1062 /* somebody or something will hit me for both perl_run and PL_restartop */
1063 PL_restartop = PL_op;
1064 perl_run (PL_curinterp);
1065
1066 /*
1067 * If perl-run returns we assume exit() was being called or the coro
1068 * fell off the end, which seems to be the only valid (non-bug)
1069 * reason for perl_run to return. We try to exit by jumping to the
1070 * bootstrap-time "top" top_env, as we cannot restore the "main"
1071 * coroutine as Coro has no such concept
1072 */
1073 PL_top_env = main_top_env;
1074 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1075}
1076
1077static coro_cctx *
1078cctx_new ()
1079{
1080 coro_cctx *cctx;
1081 void *stack_start;
1082 size_t stack_size;
1083
1084 ++cctx_count;
1085
1086 Newz (0, cctx, 1, coro_cctx);
1087
1088#if HAVE_MMAP
1089 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1090 /* mmap supposedly does allocate-on-write for us */
1091 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1092
1093 if (cctx->sptr != (void *)-1)
1094 {
1095# if CORO_STACKGUARD
1096 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1097# endif
1098 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1099 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1100 cctx->flags |= CC_MAPPED;
1101 }
1102 else
1103#endif
1104 {
1105 cctx->ssize = coro_stacksize * (long)sizeof (long);
1106 New (0, cctx->sptr, coro_stacksize, long);
1107
1108 if (!cctx->sptr)
1109 {
1110 perror ("FATAL: unable to allocate stack for coroutine");
1111 _exit (EXIT_FAILURE);
1112 }
1113
1114 stack_start = cctx->sptr;
1115 stack_size = cctx->ssize;
1116 }
1117
1118 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1119 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1120
1121 return cctx;
1122}
1123
1124static void
1125cctx_destroy (coro_cctx *cctx)
1126{
1127 if (!cctx)
1128 return;
1129
1130 --cctx_count;
1131
1132#if CORO_USE_VALGRIND
1133 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1134#endif
1135
1136#if HAVE_MMAP
1137 if (cctx->flags & CC_MAPPED)
1138 munmap (cctx->sptr, cctx->ssize);
1139 else
1140#endif
1141 Safefree (cctx->sptr);
1142
1143 Safefree (cctx);
1144}
1145
1146/* wether this cctx should be destructed */
1147#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1148
1149static coro_cctx *
1150cctx_get (pTHX)
1151{
1152 while (expect_true (cctx_first))
1153 {
1154 coro_cctx *cctx = cctx_first;
1155 cctx_first = cctx->next;
1156 --cctx_idle;
1157
1158 if (expect_true (!CCTX_EXPIRED (cctx)))
1159 return cctx;
1160
1161 cctx_destroy (cctx);
1162 }
1163
1164 return cctx_new ();
1165}
1166
1167static void
1168cctx_put (coro_cctx *cctx)
1169{
1170 /* free another cctx if overlimit */
1171 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1172 {
1173 coro_cctx *first = cctx_first;
1174 cctx_first = first->next;
1175 --cctx_idle;
1176
1177 cctx_destroy (first);
1178 }
1179
1180 ++cctx_idle;
1181 cctx->next = cctx_first;
1182 cctx_first = cctx;
1183}
1184
1185/** coroutine switching *****************************************************/
1186
1187static void
1188transfer_check (pTHX_ struct coro *prev, struct coro *next)
1189{
1190 if (expect_true (prev != next))
1191 {
1192 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1193 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1194
1195 if (expect_false (next->flags & CF_RUNNING))
1196 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1197
1198 if (expect_false (next->flags & CF_DESTROYED))
1199 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1200
1201#if !PERL_VERSION_ATLEAST (5,10,0)
1202 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1203 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1204#endif
1205 }
1206}
1207
1208/* always use the TRANSFER macro */
1209static void NOINLINE
1210transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1211{
1212 dSTACKLEVEL;
1213
1214 /* sometimes transfer is only called to set idle_sp */
1215 if (expect_false (!next))
1216 {
1217 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1218 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1219 }
1220 else if (expect_true (prev != next))
1221 {
1222 static volatile int has_throw;
1223 coro_cctx *prev__cctx;
1224
1225 if (expect_false (prev->flags & CF_NEW))
1226 {
1227 /* create a new empty context */
1228 Newz (0, prev->cctx, 1, coro_cctx);
1229 prev->flags &= ~CF_NEW;
1230 prev->flags |= CF_RUNNING;
1231 }
1232
1233 prev->flags &= ~CF_RUNNING;
1234 next->flags |= CF_RUNNING;
1235
1236 LOCK;
1237
1238 /* first get rid of the old state */
1239 save_perl (aTHX_ prev);
1240
1241 if (expect_false (next->flags & CF_NEW))
1242 {
1243 /* need to start coroutine */
1244 next->flags &= ~CF_NEW;
1245 /* setup coroutine call */
1246 coro_setup (aTHX_ next);
1247 }
806 else 1248 else
1249 load_perl (aTHX_ next);
1250
1251 prev__cctx = prev->cctx;
1252
1253 /* possibly "free" the cctx */
1254 if (expect_true (
1255 prev__cctx->idle_sp == STACKLEVEL
1256 && !(prev__cctx->flags & CC_TRACE)
1257 && !force_cctx
1258 ))
1259 {
1260 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1261 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1262
1263 prev->cctx = 0;
1264
1265 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1266 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1267 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1268 if (!next->cctx)
1269 next->cctx = cctx_get (aTHX);
1270
1271 cctx_put (prev__cctx);
1272 }
1273
1274 ++next->usecount;
1275
1276 if (expect_true (!next->cctx))
1277 next->cctx = cctx_get (aTHX);
1278
1279 has_throw = !!next->throw;
1280
1281 if (expect_false (prev__cctx != next->cctx))
1282 {
1283 prev__cctx->top_env = PL_top_env;
1284 PL_top_env = next->cctx->top_env;
1285 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1286 }
1287
1288 free_coro_mortal (aTHX);
1289 UNLOCK;
1290
1291 if (expect_false (has_throw))
1292 {
1293 struct coro *coro = SvSTATE (coro_current);
1294
1295 if (coro->throw)
807 { 1296 {
1297 SV *exception = coro->throw;
1298 coro->throw = 0;
1299 sv_setsv (ERRSV, exception);
808 setup_coro (next); 1300 croak (0);
809 next->cursp = stacklevel;
810 } 1301 }
811 } 1302 }
812 } 1303 }
1304}
1305
1306struct transfer_args
1307{
1308 struct coro *prev, *next;
1309};
1310
1311#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1312#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1313
1314/** high level stuff ********************************************************/
1315
1316static int
1317coro_state_destroy (pTHX_ struct coro *coro)
1318{
1319 if (coro->flags & CF_DESTROYED)
1320 return 0;
1321
1322 coro->flags |= CF_DESTROYED;
1323
1324 if (coro->flags & CF_READY)
1325 {
1326 /* reduce nready, as destroying a ready coro effectively unreadies it */
1327 /* alternative: look through all ready queues and remove the coro */
1328 LOCK;
1329 --coro_nready;
1330 UNLOCK;
1331 }
1332 else
1333 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1334
1335 if (coro->mainstack && coro->mainstack != main_mainstack)
1336 {
1337 struct coro temp;
1338
1339 if (coro->flags & CF_RUNNING)
1340 croak ("FATAL: tried to destroy currently running coroutine");
1341
1342 save_perl (aTHX_ &temp);
1343 load_perl (aTHX_ coro);
1344
1345 coro_destroy (aTHX_ coro);
1346
1347 load_perl (aTHX_ &temp);
1348
1349 coro->slot = 0;
1350 }
1351
1352 cctx_destroy (coro->cctx);
1353 SvREFCNT_dec (coro->args);
1354
1355 if (coro->next) coro->next->prev = coro->prev;
1356 if (coro->prev) coro->prev->next = coro->next;
1357 if (coro == coro_first) coro_first = coro->next;
1358
1359 return 1;
1360}
1361
1362static int
1363coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1364{
1365 struct coro *coro = (struct coro *)mg->mg_ptr;
1366 mg->mg_ptr = 0;
1367
1368 coro->hv = 0;
1369
1370 if (--coro->refcnt < 0)
1371 {
1372 coro_state_destroy (aTHX_ coro);
1373 Safefree (coro);
1374 }
1375
1376 return 0;
1377}
1378
1379static int
1380coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1381{
1382 struct coro *coro = (struct coro *)mg->mg_ptr;
1383
1384 ++coro->refcnt;
1385
1386 return 0;
1387}
1388
1389static MGVTBL coro_state_vtbl = {
1390 0, 0, 0, 0,
1391 coro_state_free,
1392 0,
1393#ifdef MGf_DUP
1394 coro_state_dup,
1395#else
1396# define MGf_DUP 0
1397#endif
1398};
1399
1400static void
1401prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1402{
1403 ta->prev = SvSTATE (prev_sv);
1404 ta->next = SvSTATE (next_sv);
1405 TRANSFER_CHECK (*ta);
1406}
1407
1408static void
1409api_transfer (SV *prev_sv, SV *next_sv)
1410{
1411 dTHX;
1412 struct transfer_args ta;
1413
1414 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1415 TRANSFER (ta, 1);
1416}
1417
1418/** Coro ********************************************************************/
1419
1420static void
1421coro_enq (pTHX_ SV *coro_sv)
1422{
1423 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1424}
1425
1426static SV *
1427coro_deq (pTHX)
1428{
1429 int prio;
1430
1431 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1432 if (AvFILLp (coro_ready [prio]) >= 0)
1433 return av_shift (coro_ready [prio]);
1434
1435 return 0;
1436}
1437
1438static int
1439api_ready (SV *coro_sv)
1440{
1441 dTHX;
1442 struct coro *coro;
1443 SV *sv_hook;
1444 void (*xs_hook)(void);
1445
1446 if (SvROK (coro_sv))
1447 coro_sv = SvRV (coro_sv);
1448
1449 coro = SvSTATE (coro_sv);
1450
1451 if (coro->flags & CF_READY)
1452 return 0;
1453
1454 coro->flags |= CF_READY;
813 1455
814 LOCK; 1456 LOCK;
815 if (coro_mortal) 1457
816 { 1458 sv_hook = coro_nready ? 0 : coro_readyhook;
817 SvREFCNT_dec (coro_mortal); 1459 xs_hook = coro_nready ? 0 : coroapi.readyhook;
818 coro_mortal = 0; 1460
819 } 1461 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1462 ++coro_nready;
1463
820 UNLOCK; 1464 UNLOCK;
821} 1465
1466 if (sv_hook)
1467 {
1468 dSP;
822 1469
823#define SV_CORO(sv,func) \ 1470 ENTER;
824 do { \ 1471 SAVETMPS;
825 if (SvROK (sv)) \
826 sv = SvRV (sv); \
827 \
828 if (SvTYPE (sv) == SVt_PVHV) \
829 { \
830 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831 \
832 if (!he) \
833 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834 \
835 (sv) = SvRV (HeVAL(he)); \
836 } \
837 \
838 /* must also be changed inside Coro::Cont::yield */ \
839 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841 \
842 } while(0)
843 1472
844#define SvSTATE(sv) (struct coro *)SvIV (sv) 1473 PUSHMARK (SP);
1474 PUTBACK;
1475 call_sv (sv_hook, G_DISCARD);
1476 SPAGAIN;
1477
1478 FREETMPS;
1479 LEAVE;
1480 }
1481
1482 if (xs_hook)
1483 xs_hook ();
1484
1485 return 1;
1486}
1487
1488static int
1489api_is_ready (SV *coro_sv)
1490{
1491 dTHX;
1492 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1493}
845 1494
846static void 1495static void
847api_transfer(pTHX_ SV *prev, SV *next, int flags) 1496prepare_schedule (pTHX_ struct transfer_args *ta)
848{ 1497{
849 SV_CORO (prev, "Coro::transfer"); 1498 SV *prev_sv, *next_sv;
850 SV_CORO (next, "Coro::transfer");
851 1499
852 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1500 for (;;)
853} 1501 {
1502 LOCK;
1503 next_sv = coro_deq (aTHX);
854 1504
855/** Coro ********************************************************************/ 1505 /* nothing to schedule: call the idle handler */
1506 if (expect_false (!next_sv))
1507 {
1508 dSP;
1509 UNLOCK;
856 1510
857#define PRIO_MAX 3 1511 ENTER;
858#define PRIO_HIGH 1 1512 SAVETMPS;
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863 1513
864/* for Coro.pm */ 1514 PUSHMARK (SP);
865static GV *coro_current, *coro_idle; 1515 PUTBACK;
866static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1516 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
867static int coro_nready; 1517 SPAGAIN;
1518
1519 FREETMPS;
1520 LEAVE;
1521 continue;
1522 }
1523
1524 ta->next = SvSTATE (next_sv);
1525
1526 /* cannot transfer to destroyed coros, skip and look for next */
1527 if (expect_false (ta->next->flags & CF_DESTROYED))
1528 {
1529 UNLOCK;
1530 SvREFCNT_dec (next_sv);
1531 /* coro_nready is already taken care of by destroy */
1532 continue;
1533 }
1534
1535 --coro_nready;
1536 UNLOCK;
1537 break;
1538 }
1539
1540 /* free this only after the transfer */
1541 prev_sv = SvRV (coro_current);
1542 ta->prev = SvSTATE (prev_sv);
1543 TRANSFER_CHECK (*ta);
1544 assert (ta->next->flags & CF_READY);
1545 ta->next->flags &= ~CF_READY;
1546 SvRV_set (coro_current, next_sv);
1547
1548 LOCK;
1549 free_coro_mortal (aTHX);
1550 coro_mortal = prev_sv;
1551 UNLOCK;
1552}
868 1553
869static void 1554static void
870coro_enq (pTHX_ SV *sv) 1555prepare_cede (pTHX_ struct transfer_args *ta)
871{ 1556{
872 if (SvTYPE (sv) != SVt_PVHV) 1557 api_ready (coro_current);
873 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1558 prepare_schedule (aTHX_ ta);
1559}
874 1560
875 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1561static int
876 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1562prepare_cede_notself (pTHX_ struct transfer_args *ta)
877 1563{
878 prio = prio > PRIO_MAX ? PRIO_MAX
879 : prio < PRIO_MIN ? PRIO_MIN
880 : prio;
881
882 av_push (coro_ready [prio - PRIO_MIN], sv);
883 coro_nready++; 1564 if (coro_nready)
884}
885
886static SV *
887coro_deq (pTHX_ int min_prio)
888{
889 int prio = PRIO_MAX - PRIO_MIN;
890
891 min_prio -= PRIO_MIN;
892 if (min_prio < 0)
893 min_prio = 0;
894
895 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
896 if (av_len (coro_ready[prio]) >= 0)
897 { 1565 {
898 coro_nready--; 1566 SV *prev = SvRV (coro_current);
899 return av_shift (coro_ready[prio]); 1567 prepare_schedule (aTHX_ ta);
1568 api_ready (prev);
1569 return 1;
900 } 1570 }
901 1571 else
902 return 0; 1572 return 0;
903}
904
905static void
906api_ready (SV *coro)
907{
908 dTHX;
909
910 if (SvROK (coro))
911 coro = SvRV (coro);
912
913 LOCK;
914 coro_enq (aTHX_ SvREFCNT_inc (coro));
915 UNLOCK;
916} 1573}
917 1574
918static void 1575static void
919api_schedule (void) 1576api_schedule (void)
920{ 1577{
921 dTHX; 1578 dTHX;
1579 struct transfer_args ta;
922 1580
923 SV *prev, *next; 1581 prepare_schedule (aTHX_ &ta);
1582 TRANSFER (ta, 1);
1583}
924 1584
925 LOCK; 1585static int
1586api_cede (void)
1587{
1588 dTHX;
1589 struct transfer_args ta;
926 1590
927 prev = SvRV (GvSV (coro_current)); 1591 prepare_cede (aTHX_ &ta);
928 next = coro_deq (aTHX_ PRIO_MIN);
929 1592
930 if (!next) 1593 if (expect_true (ta.prev != ta.next))
931 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1594 {
1595 TRANSFER (ta, 1);
1596 return 1;
1597 }
1598 else
1599 return 0;
1600}
932 1601
933 /* free this only after the transfer */ 1602static int
934 coro_mortal = prev; 1603api_cede_notself (void)
935 SV_CORO (prev, "Coro::schedule"); 1604{
1605 dTHX;
1606 struct transfer_args ta;
936 1607
937 SvRV (GvSV (coro_current)) = next; 1608 if (prepare_cede_notself (aTHX_ &ta))
938 1609 {
939 SV_CORO (next, "Coro::schedule"); 1610 TRANSFER (ta, 1);
940 1611 return 1;
941 UNLOCK; 1612 }
942 1613 else
943 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1614 return 0;
944 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
945} 1615}
946 1616
947static void 1617static void
948api_cede (void) 1618api_trace (SV *coro_sv, int flags)
949{ 1619{
950 dTHX; 1620 dTHX;
1621 struct coro *coro = SvSTATE (coro_sv);
951 1622
952 LOCK; 1623 if (flags & CC_TRACE)
953 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1624 {
954 UNLOCK; 1625 if (!coro->cctx)
1626 coro->cctx = cctx_new ();
1627 else if (!(coro->cctx->flags & CC_TRACE))
1628 croak ("cannot enable tracing on coroutine with custom stack");
955 1629
1630 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1631 }
1632 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1633 {
1634 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1635
1636 if (coro->flags & CF_RUNNING)
1637 PL_runops = RUNOPS_DEFAULT;
1638 else
1639 coro->slot->runops = RUNOPS_DEFAULT;
1640 }
1641}
1642
1643static int
1644coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1645{
1646 AV *padlist;
1647 AV *av = (AV *)mg->mg_obj;
1648
1649 abort ();
1650
1651 return 0;
1652}
1653
1654static MGVTBL coro_gensub_vtbl = {
1655 0, 0, 0, 0,
1656 coro_gensub_free
1657};
1658
1659/*****************************************************************************/
1660/* PerlIO::cede */
1661
1662typedef struct
1663{
1664 PerlIOBuf base;
1665 NV next, every;
1666} PerlIOCede;
1667
1668static IV
1669PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1670{
1671 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1672
1673 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1674 self->next = nvtime () + self->every;
1675
1676 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1677}
1678
1679static SV *
1680PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1681{
1682 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1683
1684 return newSVnv (self->every);
1685}
1686
1687static IV
1688PerlIOCede_flush (pTHX_ PerlIO *f)
1689{
1690 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1691 double now = nvtime ();
1692
1693 if (now >= self->next)
1694 {
956 api_schedule (); 1695 api_cede ();
957} 1696 self->next = now + self->every;
1697 }
958 1698
1699 return PerlIOBuf_flush (aTHX_ f);
1700}
1701
1702static PerlIO_funcs PerlIO_cede =
1703{
1704 sizeof(PerlIO_funcs),
1705 "cede",
1706 sizeof(PerlIOCede),
1707 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1708 PerlIOCede_pushed,
1709 PerlIOBuf_popped,
1710 PerlIOBuf_open,
1711 PerlIOBase_binmode,
1712 PerlIOCede_getarg,
1713 PerlIOBase_fileno,
1714 PerlIOBuf_dup,
1715 PerlIOBuf_read,
1716 PerlIOBuf_unread,
1717 PerlIOBuf_write,
1718 PerlIOBuf_seek,
1719 PerlIOBuf_tell,
1720 PerlIOBuf_close,
1721 PerlIOCede_flush,
1722 PerlIOBuf_fill,
1723 PerlIOBase_eof,
1724 PerlIOBase_error,
1725 PerlIOBase_clearerr,
1726 PerlIOBase_setlinebuf,
1727 PerlIOBuf_get_base,
1728 PerlIOBuf_bufsiz,
1729 PerlIOBuf_get_ptr,
1730 PerlIOBuf_get_cnt,
1731 PerlIOBuf_set_ptrcnt,
1732};
1733
1734
959MODULE = Coro::State PACKAGE = Coro::State 1735MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
960 1736
961PROTOTYPES: ENABLE 1737PROTOTYPES: DISABLE
962 1738
963BOOT: 1739BOOT:
964{ /* {} necessary for stoopid perl-5.6.x */ 1740{
965#ifdef USE_ITHREADS 1741#ifdef USE_ITHREADS
966 MUTEX_INIT (&coro_mutex); 1742 MUTEX_INIT (&coro_mutex);
967#endif 1743#endif
1744 BOOT_PAGESIZE;
968 1745
969 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1746 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
970 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1747 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1748
1749 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1750 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1751 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1752
1753 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1754 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1755 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1756
971 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1757 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
972 1758
973 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1759 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
974 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1760 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
975 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1761 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
976 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1762 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
977 1763
978 main_mainstack = PL_mainstack; 1764 main_mainstack = PL_mainstack;
1765 main_top_env = PL_top_env;
979 1766
1767 while (main_top_env->je_prev)
1768 main_top_env = main_top_env->je_prev;
1769
980 coroapi.ver = CORO_API_VERSION; 1770 coroapi.ver = CORO_API_VERSION;
1771 coroapi.rev = CORO_API_REVISION;
981 coroapi.transfer = api_transfer; 1772 coroapi.transfer = api_transfer;
982}
983 1773
984Coro::State 1774 {
985_newprocess(args) 1775 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
986 SV * args 1776
987 PROTOTYPE: $ 1777 if (!svp) croak ("Time::HiRes is required");
1778 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1779
1780 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1781 }
1782
1783 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1784}
1785
1786SV *
1787new (char *klass, ...)
988 CODE: 1788 CODE:
989 Coro__State coro; 1789{
1790 struct coro *coro;
1791 MAGIC *mg;
1792 HV *hv;
1793 int i;
990 1794
991 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
992 croak ("Coro::State::_newprocess expects an arrayref");
993
994 Newz (0, coro, 1, struct coro); 1795 Newz (0, coro, 1, struct coro);
1796 coro->args = newAV ();
1797 coro->flags = CF_NEW;
995 1798
996 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1799 if (coro_first) coro_first->prev = coro;
997 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1800 coro->next = coro_first;
998 /*coro->stack = 0;*/ 1801 coro_first = coro;
999 1802
1000 /* same as JMPENV_BOOTSTRAP */ 1803 coro->hv = hv = newHV ();
1001 /* we might be able to recycle start_env, but safe is safe */ 1804 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1002 /*Zero(&coro->start_env, 1, JMPENV);*/ 1805 mg->mg_flags |= MGf_DUP;
1003 coro->start_env.je_ret = -1; 1806 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1004 coro->start_env.je_mustcatch = TRUE;
1005 1807
1006 RETVAL = coro; 1808 av_extend (coro->args, items - 1);
1809 for (i = 1; i < items; i++)
1810 av_push (coro->args, newSVsv (ST (i)));
1811}
1007 OUTPUT: 1812 OUTPUT:
1008 RETVAL 1813 RETVAL
1009 1814
1815# these not obviously related functions are all rolled into the same xs
1816# function to increase chances that they all will call transfer with the same
1817# stack offset
1010void 1818void
1011transfer(prev, next, flags) 1819_set_stacklevel (...)
1012 SV *prev 1820 ALIAS:
1013 SV *next 1821 Coro::State::transfer = 1
1014 int flags 1822 Coro::schedule = 2
1015 PROTOTYPE: @ 1823 Coro::cede = 3
1824 Coro::cede_notself = 4
1016 CODE: 1825 CODE:
1826{
1827 struct transfer_args ta;
1828
1017 PUTBACK; 1829 PUTBACK;
1018 SV_CORO (next, "Coro::transfer"); 1830 switch (ix)
1019 SV_CORO (prev, "Coro::transfer"); 1831 {
1020 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1832 case 0:
1833 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1834 ta.next = 0;
1835 break;
1836
1837 case 1:
1838 if (items != 2)
1839 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1840
1841 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1842 break;
1843
1844 case 2:
1845 prepare_schedule (aTHX_ &ta);
1846 break;
1847
1848 case 3:
1849 prepare_cede (aTHX_ &ta);
1850 break;
1851
1852 case 4:
1853 if (!prepare_cede_notself (aTHX_ &ta))
1854 XSRETURN_EMPTY;
1855
1856 break;
1857 }
1021 SPAGAIN; 1858 SPAGAIN;
1022 1859
1860 BARRIER;
1861 PUTBACK;
1862 TRANSFER (ta, 0);
1863 SPAGAIN; /* might be the sp of a different coroutine now */
1864 /* be extra careful not to ever do anything after TRANSFER */
1865}
1866
1867bool
1868_destroy (SV *coro_sv)
1869 CODE:
1870 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1871 OUTPUT:
1872 RETVAL
1873
1023void 1874void
1024DESTROY(coro)
1025 Coro::State coro
1026 CODE:
1027
1028 if (coro->mainstack && coro->mainstack != main_mainstack)
1029 {
1030 struct coro temp;
1031
1032 PUTBACK;
1033 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1034 LOAD (aTHX_ coro);
1035 SPAGAIN;
1036
1037 destroy_stacks (aTHX);
1038
1039 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1040 SPAGAIN;
1041
1042 coro->mainstack = 0;
1043 }
1044
1045 deallocate_stack (coro);
1046 SvREFCNT_dec (coro->args);
1047 Safefree (coro);
1048
1049void
1050_exit(code) 1875_exit (int code)
1051 int code
1052 PROTOTYPE: $ 1876 PROTOTYPE: $
1053 CODE: 1877 CODE:
1054 _exit (code); 1878 _exit (code);
1055 1879
1056MODULE = Coro::State PACKAGE = Coro::Cont 1880int
1881cctx_stacksize (int new_stacksize = 0)
1882 CODE:
1883 RETVAL = coro_stacksize;
1884 if (new_stacksize)
1885 coro_stacksize = new_stacksize;
1886 OUTPUT:
1887 RETVAL
1057 1888
1058# this is slightly dirty (should expose a c-level api) 1889int
1890cctx_count ()
1891 CODE:
1892 RETVAL = cctx_count;
1893 OUTPUT:
1894 RETVAL
1895
1896int
1897cctx_idle ()
1898 CODE:
1899 RETVAL = cctx_idle;
1900 OUTPUT:
1901 RETVAL
1059 1902
1060void 1903void
1061yield(...) 1904list ()
1062 PROTOTYPE: @ 1905 PPCODE:
1906{
1907 struct coro *coro;
1908 for (coro = coro_first; coro; coro = coro->next)
1909 if (coro->hv)
1910 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1911}
1912
1913void
1914call (Coro::State coro, SV *coderef)
1915 ALIAS:
1916 eval = 1
1917 CODE:
1918{
1919 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1920 {
1921 struct coro temp;
1922
1923 if (!(coro->flags & CF_RUNNING))
1924 {
1925 PUTBACK;
1926 save_perl (aTHX_ &temp);
1927 load_perl (aTHX_ coro);
1928 }
1929
1930 {
1931 dSP;
1932 ENTER;
1933 SAVETMPS;
1934 PUTBACK;
1935 PUSHSTACK;
1936 PUSHMARK (SP);
1937
1938 if (ix)
1939 eval_sv (coderef, 0);
1940 else
1941 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1942
1943 POPSTACK;
1944 SPAGAIN;
1945 FREETMPS;
1946 LEAVE;
1947 PUTBACK;
1948 }
1949
1950 if (!(coro->flags & CF_RUNNING))
1951 {
1952 save_perl (aTHX_ coro);
1953 load_perl (aTHX_ &temp);
1954 SPAGAIN;
1955 }
1956 }
1957}
1958
1959SV *
1960is_ready (Coro::State coro)
1961 PROTOTYPE: $
1962 ALIAS:
1963 is_ready = CF_READY
1964 is_running = CF_RUNNING
1965 is_new = CF_NEW
1966 is_destroyed = CF_DESTROYED
1967 CODE:
1968 RETVAL = boolSV (coro->flags & ix);
1969 OUTPUT:
1970 RETVAL
1971
1972void
1973api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1974
1975SV *
1976has_cctx (Coro::State coro)
1977 PROTOTYPE: $
1978 CODE:
1979 RETVAL = boolSV (!!coro->cctx);
1980 OUTPUT:
1981 RETVAL
1982
1983int
1984is_traced (Coro::State coro)
1985 PROTOTYPE: $
1986 CODE:
1987 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1988 OUTPUT:
1989 RETVAL
1990
1991IV
1992rss (Coro::State coro)
1993 PROTOTYPE: $
1994 ALIAS:
1995 usecount = 1
1063 CODE: 1996 CODE:
1064 SV *yieldstack; 1997 switch (ix)
1065 SV *sv; 1998 {
1066 AV *defav = GvAV (PL_defgv); 1999 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1067 struct coro *prev, *next; 2000 case 1: RETVAL = coro->usecount; break;
1068
1069 yieldstack = *hv_fetch (
1070 (HV *)SvRV (GvSV (coro_current)),
1071 "yieldstack", sizeof ("yieldstack") - 1,
1072 0 2001 }
2002 OUTPUT:
2003 RETVAL
2004
2005void
2006force_cctx ()
2007 CODE:
2008 struct coro *coro = SvSTATE (coro_current);
2009 coro->cctx->idle_sp = 0;
2010
2011void
2012swap_defsv (Coro::State self)
2013 PROTOTYPE: $
2014 ALIAS:
2015 swap_defav = 1
2016 CODE:
2017 if (!self->slot)
2018 croak ("cannot swap state with coroutine that has no saved state");
2019 else
1073 ); 2020 {
2021 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2022 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1074 2023
1075 /* set up @_ -- ugly */ 2024 SV *tmp = *src; *src = *dst; *dst = tmp;
1076 av_clear (defav); 2025 }
1077 av_fill (defav, items - 1);
1078 while (items--)
1079 av_store (defav, items, SvREFCNT_inc (ST(items)));
1080
1081 sv = av_pop ((AV *)SvRV (yieldstack));
1082 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1083 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1084 SvREFCNT_dec (sv);
1085
1086 transfer (aTHX_ prev, next, 0);
1087 2026
1088MODULE = Coro::State PACKAGE = Coro 2027MODULE = Coro::State PACKAGE = Coro
1089 2028
1090# this is slightly dirty (should expose a c-level api)
1091
1092BOOT: 2029BOOT:
1093{ 2030{
1094 int i; 2031 int i;
2032
2033 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2034 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2035 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2036
2037 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2038 SvREADONLY_on (coro_current);
2039
1095 HV *stash = gv_stashpv ("Coro", TRUE); 2040 coro_stash = gv_stashpv ("Coro", TRUE);
1096 2041
1097 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2042 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1098 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2043 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1099 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2044 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1100 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2045 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1101 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2046 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1102 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2047 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1103
1104 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1105 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1106 2048
1107 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2049 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1108 coro_ready[i] = newAV (); 2050 coro_ready[i] = newAV ();
1109 2051
1110 { 2052 {
1111 SV *sv = perl_get_sv("Coro::API", 1); 2053 SV *sv = perl_get_sv ("Coro::API", TRUE);
2054 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1112 2055
1113 coroapi.schedule = api_schedule; 2056 coroapi.schedule = api_schedule;
1114 coroapi.cede = api_cede; 2057 coroapi.cede = api_cede;
2058 coroapi.cede_notself = api_cede_notself;
1115 coroapi.ready = api_ready; 2059 coroapi.ready = api_ready;
2060 coroapi.is_ready = api_is_ready;
1116 coroapi.nready = &coro_nready; 2061 coroapi.nready = &coro_nready;
1117 coroapi.current = coro_current; 2062 coroapi.current = coro_current;
1118 2063
1119 GCoroAPI = &coroapi; 2064 GCoroAPI = &coroapi;
1120 sv_setiv(sv, (IV)&coroapi); 2065 sv_setiv (sv, (IV)&coroapi);
1121 SvREADONLY_on(sv); 2066 SvREADONLY_on (sv);
1122 } 2067 }
1123} 2068}
1124 2069
1125#if !PERL_MICRO
1126
1127void 2070void
1128ready(self) 2071_set_current (SV *current)
1129 SV * self
1130 PROTOTYPE: $ 2072 PROTOTYPE: $
1131 CODE: 2073 CODE:
1132 api_ready (self); 2074 SvREFCNT_dec (SvRV (coro_current));
2075 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1133 2076
1134#endif 2077void
2078_set_readyhook (SV *hook)
2079 PROTOTYPE: $
2080 CODE:
2081 LOCK;
2082 SvREFCNT_dec (coro_readyhook);
2083 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2084 UNLOCK;
1135 2085
1136int 2086int
2087prio (Coro::State coro, int newprio = 0)
2088 ALIAS:
2089 nice = 1
2090 CODE:
2091{
2092 RETVAL = coro->prio;
2093
2094 if (items > 1)
2095 {
2096 if (ix)
2097 newprio = coro->prio - newprio;
2098
2099 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2100 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2101
2102 coro->prio = newprio;
2103 }
2104}
2105 OUTPUT:
2106 RETVAL
2107
2108SV *
2109ready (SV *self)
2110 PROTOTYPE: $
2111 CODE:
2112 RETVAL = boolSV (api_ready (self));
2113 OUTPUT:
2114 RETVAL
2115
2116int
1137nready(...) 2117nready (...)
1138 PROTOTYPE: 2118 PROTOTYPE:
1139 CODE: 2119 CODE:
1140 RETVAL = coro_nready; 2120 RETVAL = coro_nready;
1141 OUTPUT: 2121 OUTPUT:
1142 RETVAL 2122 RETVAL
1143 2123
1144void 2124void
1145schedule(...) 2125throw (Coro::State self, SV *throw = &PL_sv_undef)
1146 PROTOTYPE: 2126 PROTOTYPE: $;$
2127 CODE:
2128 SvREFCNT_dec (self->throw);
2129 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2130
2131# for async_pool speedup
2132void
2133_pool_1 (SV *cb)
1147 CODE: 2134 CODE:
1148 api_schedule (); 2135{
2136 struct coro *coro = SvSTATE (coro_current);
2137 HV *hv = (HV *)SvRV (coro_current);
2138 AV *defav = GvAV (PL_defgv);
2139 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2140 AV *invoke_av;
2141 int i, len;
2142
2143 if (!invoke)
2144 {
2145 SV *old = PL_diehook;
2146 PL_diehook = 0;
2147 SvREFCNT_dec (old);
2148 croak ("\3async_pool terminate\2\n");
2149 }
2150
2151 SvREFCNT_dec (coro->saved_deffh);
2152 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2153
2154 hv_store (hv, "desc", sizeof ("desc") - 1,
2155 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2156
2157 invoke_av = (AV *)SvRV (invoke);
2158 len = av_len (invoke_av);
2159
2160 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2161
2162 if (len > 0)
2163 {
2164 av_fill (defav, len - 1);
2165 for (i = 0; i < len; ++i)
2166 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2167 }
2168
2169 SvREFCNT_dec (invoke);
2170}
1149 2171
1150void 2172void
1151cede(...) 2173_pool_2 (SV *cb)
1152 PROTOTYPE:
1153 CODE: 2174 CODE:
1154 api_cede (); 2175{
2176 struct coro *coro = SvSTATE (coro_current);
1155 2177
1156# and these are hacks 2178 sv_setsv (cb, &PL_sv_undef);
2179
2180 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2181 coro->saved_deffh = 0;
2182
2183 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2184 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2185 {
2186 SV *old = PL_diehook;
2187 PL_diehook = 0;
2188 SvREFCNT_dec (old);
2189 croak ("\3async_pool terminate\2\n");
2190 }
2191
2192 av_clear (GvAV (PL_defgv));
2193 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2194 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2195
2196 coro->prio = 0;
2197
2198 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2199 api_trace (coro_current, 0);
2200
2201 av_push (av_async_pool, newSVsv (coro_current));
2202}
2203
2204#if 0
2205
2206void
2207_generator_call (...)
2208 PROTOTYPE: @
2209 PPCODE:
2210 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2211 xxxx
2212 abort ();
2213
1157SV * 2214SV *
1158_aio_get_state () 2215gensub (SV *sub, ...)
1159 CODE: 2216 PROTOTYPE: &;@
2217 CODE:
1160{ 2218{
1161 struct { 2219 struct coro *coro;
1162 int errorno; 2220 MAGIC *mg;
1163 int laststype; 2221 CV *xcv;
1164 int laststatval; 2222 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1165 Stat_t statcache; 2223 int i;
1166 } data;
1167 2224
1168 data.errorno = errno; 2225 CvGV (ncv) = CvGV (cv);
1169 data.laststype = PL_laststype; 2226 CvFILE (ncv) = CvFILE (cv);
1170 data.laststatval = PL_laststatval;
1171 data.statcache = PL_statcache;
1172 2227
1173 RETVAL = newSVpvn ((char *)&data, sizeof data); 2228 Newz (0, coro, 1, struct coro);
2229 coro->args = newAV ();
2230 coro->flags = CF_NEW;
2231
2232 av_extend (coro->args, items - 1);
2233 for (i = 1; i < items; i++)
2234 av_push (coro->args, newSVsv (ST (i)));
2235
2236 CvISXSUB_on (ncv);
2237 CvXSUBANY (ncv).any_ptr = (void *)coro;
2238
2239 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2240
2241 CvXSUB (ncv) = CvXSUB (xcv);
2242 CvANON_on (ncv);
2243
2244 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2245 RETVAL = newRV_noinc ((SV *)ncv);
1174} 2246}
1175 OUTPUT: 2247 OUTPUT:
1176 RETVAL 2248 RETVAL
1177 2249
2250#endif
2251
2252
2253MODULE = Coro::State PACKAGE = Coro::AIO
2254
1178void 2255void
1179_aio_set_state (char *data_) 2256_get_state (SV *self)
2257 PPCODE:
2258{
2259 AV *defav = GvAV (PL_defgv);
2260 AV *av = newAV ();
2261 int i;
2262 SV *data_sv = newSV (sizeof (struct io_state));
2263 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2264 SvCUR_set (data_sv, sizeof (struct io_state));
2265 SvPOK_only (data_sv);
2266
2267 data->errorno = errno;
2268 data->laststype = PL_laststype;
2269 data->laststatval = PL_laststatval;
2270 data->statcache = PL_statcache;
2271
2272 av_extend (av, AvFILLp (defav) + 1 + 1);
2273
2274 for (i = 0; i <= AvFILLp (defav); ++i)
2275 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2276
2277 av_push (av, data_sv);
2278
2279 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2280
2281 api_ready (self);
2282}
2283
2284void
2285_set_state (SV *state)
1180 PROTOTYPE: $ 2286 PROTOTYPE: $
2287 PPCODE:
2288{
2289 AV *av = (AV *)SvRV (state);
2290 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2291 int i;
2292
2293 errno = data->errorno;
2294 PL_laststype = data->laststype;
2295 PL_laststatval = data->laststatval;
2296 PL_statcache = data->statcache;
2297
2298 EXTEND (SP, AvFILLp (av));
2299 for (i = 0; i < AvFILLp (av); ++i)
2300 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2301}
2302
2303
2304MODULE = Coro::State PACKAGE = Coro::AnyEvent
2305
2306BOOT:
2307 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2308
2309SV *
2310_schedule (...)
2311 PROTOTYPE: @
1181 CODE: 2312 CODE:
1182{ 2313{
1183 struct { 2314 static int incede;
1184 int errorno;
1185 int laststype;
1186 int laststatval;
1187 Stat_t statcache;
1188 } *data = (void *)data_;
1189 2315
1190 errno = data->errorno; 2316 api_cede_notself ();
1191 PL_laststype = data->laststype; 2317
1192 PL_laststatval = data->laststatval; 2318 ++incede;
1193 PL_statcache = data->statcache; 2319 while (coro_nready >= incede && api_cede ())
2320 ;
2321
2322 sv_setsv (sv_activity, &PL_sv_undef);
2323 if (coro_nready >= incede)
2324 {
2325 PUSHMARK (SP);
2326 PUTBACK;
2327 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2328 SPAGAIN;
2329 }
2330
2331 --incede;
1194} 2332}
2333
2334
2335MODULE = Coro::State PACKAGE = PerlIO::cede
2336
2337BOOT:
2338 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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