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Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.248 by root, Mon Sep 29 12:40:50 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/* 5.8.8 */
87#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0
89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
92#endif
93
94/* 5.11 */
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
98
99/* 5.8.7 */
100#ifndef SvRV_set
101# define SvRV_set(s,v) SvRV(s) = (v)
102#endif
33 103
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 105# undef CORO_STACKGUARD
36#endif
37
38#ifndef STACKGUARD
39# define STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif
51# endif 106#endif
52# include <limits.h> 107
53# ifndef PAGESIZE 108#ifndef CORO_STACKGUARD
54# define PAGESIZE pagesize 109# define CORO_STACKGUARD 0
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif 110#endif
60#endif
61 111
62#define SUB_INIT "Coro::State::initialize" 112/* prefer perl internal functions over our own? */
113#ifndef CORO_PREFER_PERL_FUNCTIONS
114# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif
63 116
64/* The next macro should declare a variable stacklevel that contains and approximation 117/* The next macros try to return the current stack pointer, in an as
65 * to the current C stack pointer. Its property is that it changes with each call 118 * portable way as possible. */
66 * and should be unique. */ 119#define dSTACKLEVEL volatile char stacklevel
67#define dSTACKLEVEL void *stacklevel = &stacklevel 120#define STACKLEVEL ((void *)&stacklevel)
68 121
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 122#define IN_DESTRUCT (PL_main_cv == Nullcv)
70 123
71#define labs(l) ((l) >= 0 ? (l) : -(l)) 124#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value))
128#else
129# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr)
132#endif
133
134#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1)
136
137#define NOINLINE attribute ((noinline))
72 138
73#include "CoroAPI.h" 139#include "CoroAPI.h"
74 140
75#ifdef USE_ITHREADS 141#ifdef USE_ITHREADS
76static perl_mutex coro_mutex; 142static perl_mutex coro_mutex;
… …
79#else 145#else
80# define LOCK (void)0 146# define LOCK (void)0
81# define UNLOCK (void)0 147# define UNLOCK (void)0
82#endif 148#endif
83 149
150/* helper storage struct for Coro::AIO */
151struct io_state
152{
153 int errorno;
154 I32 laststype;
155 int laststatval;
156 Stat_t statcache;
157};
158
159static double (*nvtime)(); /* so why doesn't it take void? */
160
161static size_t coro_stacksize = CORO_STACKSIZE;
84static struct CoroAPI coroapi; 162static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 163static AV *main_mainstack; /* used to differentiate between $main and others */
164static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 165static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 166static volatile SV *coro_mortal; /* will be freed after next transfer */
88 167
89/* this is actually not only the c stack but also c registers etc... */ 168static GV *irsgv; /* $/ */
169static GV *stdoutgv; /* *STDOUT */
170static SV *rv_diehook;
171static SV *rv_warnhook;
172static HV *hv_sig; /* %SIG */
173
174/* async_pool helper stuff */
175static SV *sv_pool_rss;
176static SV *sv_pool_size;
177static AV *av_async_pool;
178
179/* Coro::AnyEvent */
180static SV *sv_activity;
181
182static struct coro_cctx *cctx_first;
183static int cctx_count, cctx_idle;
184
185enum {
186 CC_MAPPED = 0x01,
187 CC_NOREUSE = 0x02, /* throw this away after tracing */
188 CC_TRACE = 0x04,
189 CC_TRACE_SUB = 0x08, /* trace sub calls */
190 CC_TRACE_LINE = 0x10, /* trace each statement */
191 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
192};
193
194/* this is a structure representing a c-level coroutine */
195typedef struct coro_cctx {
196 struct coro_cctx *next;
197
198 /* the stack */
199 void *sptr;
200 size_t ssize;
201
202 /* cpu state */
203 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
204 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
205 JMPENV *top_env;
206 coro_context cctx;
207
208#if CORO_USE_VALGRIND
209 int valgrind_id;
210#endif
211 unsigned char flags;
212} coro_cctx;
213
214enum {
215 CF_RUNNING = 0x0001, /* coroutine is running */
216 CF_READY = 0x0002, /* coroutine is ready */
217 CF_NEW = 0x0004, /* has never been switched to */
218 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
219};
220
221/* the structure where most of the perl state is stored, overlaid on the cxstack */
90typedef struct { 222typedef struct {
91 int refcnt; /* pointer reference counter */ 223 SV *defsv;
92 int usecnt; /* shared by how many coroutines */ 224 AV *defav;
93 int gencnt; /* generation counter */ 225 SV *errsv;
226 SV *irsgv;
227#define VAR(name,type) type name;
228# include "state.h"
229#undef VAR
230} perl_slots;
94 231
95 coro_context cctx; 232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
96 233
97 void *sptr; 234/* this is a structure representing a perl-level coroutine */
98 long ssize; /* positive == mmap, otherwise malloc */
99} coro_stack;
100
101struct coro { 235struct coro {
102 /* the optional C context */ 236 /* the c coroutine allocated to this perl coroutine, if any */
103 coro_stack *stack; 237 coro_cctx *cctx;
104 void *cursp;
105 int gencnt;
106 238
107 /* optionally saved, might be zero */ 239 /* process data */
108 AV *defav;
109 SV *defsv;
110 SV *errsv;
111
112 /* saved global state not related to stacks */
113 U8 dowarn;
114 I32 in_eval;
115
116 /* the stacks and related info (callchain etc..) */
117 PERL_SI *curstackinfo;
118 AV *curstack;
119 AV *mainstack; 240 AV *mainstack;
120 SV **stack_sp; 241 perl_slots *slot; /* basically the saved sp */
121 OP *op; 242
122 SV **curpad; 243 AV *args; /* data associated with this coroutine (initial args) */
123 AV *comppad; 244 int refcnt; /* coroutines are refcounted, yes */
124 CV *compcv; 245 int flags; /* CF_ flags */
125 SV **stack_base; 246 HV *hv; /* the perl hash associated with this coro, if any */
126 SV **stack_max; 247
127 SV **tmps_stack; 248 /* statistics */
128 I32 tmps_floor; 249 int usecount; /* number of transfers to this coro */
129 I32 tmps_ix;
130 I32 tmps_max;
131 I32 *markstack;
132 I32 *markstack_ptr;
133 I32 *markstack_max;
134 I32 *scopestack;
135 I32 scopestack_ix;
136 I32 scopestack_max;
137 ANY *savestack;
138 I32 savestack_ix;
139 I32 savestack_max;
140 OP **retstack;
141 I32 retstack_ix;
142 I32 retstack_max;
143 PMOP *curpm;
144 COP *curcop;
145 JMPENV *top_env;
146 250
147 /* coro process data */ 251 /* coro process data */
148 int prio; 252 int prio;
253 SV *throw; /* exception to be thrown */
149 254
150 /* data associated with this coroutine (initial args) */ 255 /* async_pool */
151 AV *args; 256 SV *saved_deffh;
152 int refcnt; 257
258 /* linked list */
259 struct coro *next, *prev;
153}; 260};
154 261
155typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
157 264
265/** Coro ********************************************************************/
266
267#define PRIO_MAX 3
268#define PRIO_HIGH 1
269#define PRIO_NORMAL 0
270#define PRIO_LOW -1
271#define PRIO_IDLE -3
272#define PRIO_MIN -4
273
274/* for Coro.pm */
275static SV *coro_current;
276static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
278static int coro_nready;
279static struct coro *coro_first;
280
281/** lowlevel stuff **********************************************************/
282
283static SV *
284coro_get_sv (pTHX_ const char *name, int create)
285{
286#if PERL_VERSION_ATLEAST (5,10,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_sv (name, create);
289#endif
290 return get_sv (name, create);
291}
292
293static AV *
294coro_get_av (pTHX_ const char *name, int create)
295{
296#if PERL_VERSION_ATLEAST (5,10,0)
297 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
298 get_av (name, create);
299#endif
300 return get_av (name, create);
301}
302
303static HV *
304coro_get_hv (pTHX_ const char *name, int create)
305{
306#if PERL_VERSION_ATLEAST (5,10,0)
307 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
308 get_hv (name, create);
309#endif
310 return get_hv (name, create);
311}
312
158static AV * 313static AV *
159coro_clone_padlist (pTHX_ CV *cv) 314coro_clone_padlist (pTHX_ CV *cv)
160{ 315{
161 AV *padlist = CvPADLIST (cv); 316 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 317 AV *newpadlist, *newpad;
163 318
164 newpadlist = newAV (); 319 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 320 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 321#if PERL_VERSION_ATLEAST (5,10,0)
322 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
323#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 325#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 327 --AvFILLp (padlist);
173 328
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 329 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
209 364
210 /* casting is fun. */ 365 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 366 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 367 free_padlist (aTHX_ padlist);
213 368
214 SvREFCNT_dec (av); 369 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 370
216 return 0; 371 return 0;
217} 372}
218 373
219#define PERL_MAGIC_coro PERL_MAGIC_ext 374#define CORO_MAGIC_type_cv PERL_MAGIC_ext
375#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 376
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 377static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0,
379 coro_cv_free
380};
381
382#define CORO_MAGIC(sv,type) \
383 SvMAGIC (sv) \
384 ? SvMAGIC (sv)->mg_type == type \
385 ? SvMAGIC (sv) \
386 : mg_find (sv, type) \
387 : 0
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391
392static struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
222 417
223/* the next two functions merely cache the padlists */ 418/* the next two functions merely cache the padlists */
224static void 419static void
225get_padlist (pTHX_ CV *cv) 420get_padlist (pTHX_ CV *cv)
226{ 421{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 422 MAGIC *mg = CORO_MAGIC_cv (cv);
423 AV *av;
228 424
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 425 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 426 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 427 else
232 { 428 {
233#if 0 429#if CORO_PREFER_PERL_FUNCTIONS
234 /* this should work - but it doesn't :( */ 430 /* this is probably cleaner? but also slower! */
431 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 432 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 433 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 434 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 435 SvREFCNT_dec (cp);
239#else 436#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 437 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 440}
244 441
245static void 442static void
246put_padlist (pTHX_ CV *cv) 443put_padlist (pTHX_ CV *cv)
247{ 444{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
249 447
250 if (!mg) 448 if (expect_false (!mg))
251 { 449 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257 450
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 451 av = (AV *)mg->mg_obj;
259}
260 452
261#define SB do { 453 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 454 av_extend (av, AvMAX (av) + 1);
263 455
264#define LOAD(state) load_state(aTHX_ (state)); 456 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 457}
266 458
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 459/** load & save, init *******************************************************/
268 460
269static void 461static void
270load_state(pTHX_ Coro__State c) 462load_perl (pTHX_ Coro__State c)
271{ 463{
272 PL_dowarn = c->dowarn; 464 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 465 c->slot = 0;
274 466
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 467 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305 PL_top_env = c->top_env;
306 468
307 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 469 GvSV (PL_defgv) = slot->defsv;
308 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 470 GvAV (PL_defgv) = slot->defav;
309 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 471 GvSV (PL_errgv) = slot->errsv;
472 GvSV (irsgv) = slot->irsgv;
473
474 #define VAR(name,type) PL_ ## name = slot->name;
475 # include "state.h"
476 #undef VAR
310 477
311 { 478 {
312 dSP; 479 dSP;
480
313 CV *cv; 481 CV *cv;
314 482
315 /* now do the ugly restore mess */ 483 /* now do the ugly restore mess */
316 while ((cv = (CV *)POPs)) 484 while (expect_true (cv = (CV *)POPs))
317 { 485 {
318 AV *padlist = (AV *)POPs;
319
320 if (padlist)
321 {
322 put_padlist (aTHX_ cv); /* mark this padlist as available */ 486 put_padlist (aTHX_ cv); /* mark this padlist as available */
323 CvPADLIST(cv) = padlist; 487 CvDEPTH (cv) = PTR2IV (POPs);
324 } 488 CvPADLIST (cv) = (AV *)POPs;
325
326 ++CvDEPTH(cv);
327 } 489 }
328 490
329 PUTBACK; 491 PUTBACK;
330 } 492 }
331} 493}
332 494
333static void 495static void
334save_state(pTHX_ Coro__State c, int flags) 496save_perl (pTHX_ Coro__State c)
335{ 497{
336 { 498 {
337 dSP; 499 dSP;
338 I32 cxix = cxstack_ix; 500 I32 cxix = cxstack_ix;
339 PERL_CONTEXT *ccstk = cxstack; 501 PERL_CONTEXT *ccstk = cxstack;
… …
342 /* 504 /*
343 * the worst thing you can imagine happens first - we have to save 505 * the worst thing you can imagine happens first - we have to save
344 * (and reinitialize) all cv's in the whole callchain :( 506 * (and reinitialize) all cv's in the whole callchain :(
345 */ 507 */
346 508
347 PUSHs (Nullsv); 509 XPUSHs (Nullsv);
348 /* this loop was inspired by pp_caller */ 510 /* this loop was inspired by pp_caller */
349 for (;;) 511 for (;;)
350 { 512 {
351 while (cxix >= 0) 513 while (expect_true (cxix >= 0))
352 { 514 {
353 PERL_CONTEXT *cx = &ccstk[cxix--]; 515 PERL_CONTEXT *cx = &ccstk[cxix--];
354 516
355 if (CxTYPE(cx) == CXt_SUB) 517 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356 { 518 {
357 CV *cv = cx->blk_sub.cv; 519 CV *cv = cx->blk_sub.cv;
520
358 if (CvDEPTH(cv)) 521 if (expect_true (CvDEPTH (cv)))
359 { 522 {
360 EXTEND (SP, CvDEPTH(cv)*2); 523 EXTEND (SP, 3);
361
362 while (--CvDEPTH(cv))
363 {
364 /* this tells the restore code to increment CvDEPTH */
365 PUSHs (Nullsv);
366 PUSHs ((SV *)cv);
367 }
368
369 PUSHs ((SV *)CvPADLIST(cv)); 524 PUSHs ((SV *)CvPADLIST (cv));
525 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
370 PUSHs ((SV *)cv); 526 PUSHs ((SV *)cv);
371 527
528 CvDEPTH (cv) = 0;
372 get_padlist (aTHX_ cv); 529 get_padlist (aTHX_ cv);
373 } 530 }
374 } 531 }
375#ifdef CXt_FORMAT
376 else if (CxTYPE(cx) == CXt_FORMAT)
377 {
378 /* I never used formats, so how should I know how these are implemented? */
379 /* my bold guess is as a simple, plain sub... */
380 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381 }
382#endif
383 } 532 }
384 533
385 if (top_si->si_type == PERLSI_MAIN) 534 if (expect_true (top_si->si_type == PERLSI_MAIN))
386 break; 535 break;
387 536
388 top_si = top_si->si_prev; 537 top_si = top_si->si_prev;
389 ccstk = top_si->si_cxstack; 538 ccstk = top_si->si_cxstack;
390 cxix = top_si->si_cxix; 539 cxix = top_si->si_cxix;
391 } 540 }
392 541
393 PUTBACK; 542 PUTBACK;
394 } 543 }
395 544
396 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 545 /* allocate some space on the context stack for our purposes */
397 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 546 /* we manually unroll here, as usually 2 slots is enough */
398 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 547 if (SLOT_COUNT >= 1) CXINC;
548 if (SLOT_COUNT >= 2) CXINC;
549 if (SLOT_COUNT >= 3) CXINC;
550 {
551 int i;
552 for (i = 3; i < SLOT_COUNT; ++i)
553 CXINC;
554 }
555 cxstack_ix -= SLOT_COUNT; /* undo allocation */
399 556
400 c->dowarn = PL_dowarn;
401 c->in_eval = PL_in_eval;
402
403 c->curstackinfo = PL_curstackinfo;
404 c->curstack = PL_curstack;
405 c->mainstack = PL_mainstack; 557 c->mainstack = PL_mainstack;
406 c->stack_sp = PL_stack_sp; 558
407 c->op = PL_op; 559 {
408 c->curpad = PL_curpad; 560 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409 c->comppad = PL_comppad; 561
410 c->compcv = PL_compcv; 562 slot->defav = GvAV (PL_defgv);
411 c->stack_base = PL_stack_base; 563 slot->defsv = DEFSV;
412 c->stack_max = PL_stack_max; 564 slot->errsv = ERRSV;
413 c->tmps_stack = PL_tmps_stack; 565 slot->irsgv = GvSV (irsgv);
414 c->tmps_floor = PL_tmps_floor; 566
415 c->tmps_ix = PL_tmps_ix; 567 #define VAR(name,type) slot->name = PL_ ## name;
416 c->tmps_max = PL_tmps_max; 568 # include "state.h"
417 c->markstack = PL_markstack; 569 #undef VAR
418 c->markstack_ptr = PL_markstack_ptr; 570 }
419 c->markstack_max = PL_markstack_max;
420 c->scopestack = PL_scopestack;
421 c->scopestack_ix = PL_scopestack_ix;
422 c->scopestack_max = PL_scopestack_max;
423 c->savestack = PL_savestack;
424 c->savestack_ix = PL_savestack_ix;
425 c->savestack_max = PL_savestack_max;
426#if PERL_VERSION < 9
427 c->retstack = PL_retstack;
428 c->retstack_ix = PL_retstack_ix;
429 c->retstack_max = PL_retstack_max;
430#endif
431 c->curpm = PL_curpm;
432 c->curcop = PL_curcop;
433 c->top_env = PL_top_env;
434} 571}
435 572
436/* 573/*
437 * allocate various perl stacks. This is an exact copy 574 * allocate various perl stacks. This is an exact copy
438 * of perl.c:init_stacks, except that it uses less memory 575 * of perl.c:init_stacks, except that it uses less memory
439 * on the (sometimes correct) assumption that coroutines do 576 * on the (sometimes correct) assumption that coroutines do
440 * not usually need a lot of stackspace. 577 * not usually need a lot of stackspace.
441 */ 578 */
579#if CORO_PREFER_PERL_FUNCTIONS
580# define coro_init_stacks init_stacks
581#else
442static void 582static void
443coro_init_stacks (pTHX) 583coro_init_stacks (pTHX)
444{ 584{
445 LOCK; 585 PL_curstackinfo = new_stackinfo(32, 8);
446
447 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448 PL_curstackinfo->si_type = PERLSI_MAIN; 586 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack; 587 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 588 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451 589
452 PL_stack_base = AvARRAY(PL_curstack); 590 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base; 591 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 592 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455 593
456 New(50,PL_tmps_stack,96,SV*); 594 New(50,PL_tmps_stack,32,SV*);
457 PL_tmps_floor = -1; 595 PL_tmps_floor = -1;
458 PL_tmps_ix = -1; 596 PL_tmps_ix = -1;
459 PL_tmps_max = 96; 597 PL_tmps_max = 32;
460 598
461 New(54,PL_markstack,16,I32); 599 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack; 600 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 16; 601 PL_markstack_max = PL_markstack + 16;
464 602
465#ifdef SET_MARK_OFFSET 603#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET; 604 SET_MARK_OFFSET;
467#endif 605#endif
468 606
469 New(54,PL_scopestack,16,I32); 607 New(54,PL_scopestack,8,I32);
470 PL_scopestack_ix = 0; 608 PL_scopestack_ix = 0;
471 PL_scopestack_max = 16; 609 PL_scopestack_max = 8;
472 610
473 New(54,PL_savestack,96,ANY); 611 New(54,PL_savestack,24,ANY);
474 PL_savestack_ix = 0; 612 PL_savestack_ix = 0;
475 PL_savestack_max = 96; 613 PL_savestack_max = 24;
476 614
477#if PERL_VERSION < 9 615#if !PERL_VERSION_ATLEAST (5,10,0)
478 New(54,PL_retstack,8,OP*); 616 New(54,PL_retstack,4,OP*);
479 PL_retstack_ix = 0; 617 PL_retstack_ix = 0;
480 PL_retstack_max = 8; 618 PL_retstack_max = 4;
481#endif 619#endif
482
483 UNLOCK;
484} 620}
621#endif
485 622
486/* 623/*
487 * destroy the stacks, the callchain etc... 624 * destroy the stacks, the callchain etc...
488 */ 625 */
489static void 626static void
490destroy_stacks(pTHX) 627coro_destroy_stacks (pTHX)
491{ 628{
492 if (!IN_DESTRUCT)
493 {
494 /* is this ugly, I ask? */
495 LEAVE_SCOPE (0);
496
497 /* sure it is, but more important: is it correct?? :/ */
498 FREETMPS;
499
500 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501 }
502
503 while (PL_curstackinfo->si_next) 629 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 630 PL_curstackinfo = PL_curstackinfo->si_next;
505 631
506 while (PL_curstackinfo) 632 while (PL_curstackinfo)
507 { 633 {
508 PERL_SI *p = PL_curstackinfo->si_prev; 634 PERL_SI *p = PL_curstackinfo->si_prev;
509 635
510 { /*D*//*remove*/
511 dSP;
512 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513 PUTBACK; /* possibly superfluous */
514 }
515
516 if (!IN_DESTRUCT) 636 if (!IN_DESTRUCT)
517 {
518 dounwind (-1);/*D*//*remove*/
519 SvREFCNT_dec (PL_curstackinfo->si_stack); 637 SvREFCNT_dec (PL_curstackinfo->si_stack);
520 }
521 638
522 Safefree (PL_curstackinfo->si_cxstack); 639 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree (PL_curstackinfo); 640 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p; 641 PL_curstackinfo = p;
525 } 642 }
526 643
527 Safefree (PL_tmps_stack); 644 Safefree (PL_tmps_stack);
528 Safefree (PL_markstack); 645 Safefree (PL_markstack);
529 Safefree (PL_scopestack); 646 Safefree (PL_scopestack);
530 Safefree (PL_savestack); 647 Safefree (PL_savestack);
531#if PERL_VERSION < 9 648#if !PERL_VERSION_ATLEAST (5,10,0)
532 Safefree (PL_retstack); 649 Safefree (PL_retstack);
533#endif 650#endif
534} 651}
535 652
536static void 653static size_t
537allocate_stack (Coro__State ctx, int alloc) 654coro_rss (pTHX_ struct coro *coro)
538{ 655{
539 coro_stack *stack; 656 size_t rss = sizeof (*coro);
540 657
541 New (0, stack, 1, coro_stack); 658 if (coro->mainstack)
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546
547 if (alloc)
548 { 659 {
549#if HAVE_MMAP 660 perl_slots tmp_slot;
550 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 661 perl_slots *slot;
551 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 662
552 if (stack->sptr != (void *)-1) 663 if (coro->flags & CF_RUNNING)
553 { 664 {
554# if STACKGUARD 665 slot = &tmp_slot;
555 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 666
556# endif 667 #define VAR(name,type) slot->name = PL_ ## name;
668 # include "state.h"
669 #undef VAR
557 } 670 }
558 else 671 else
559#endif 672 slot = coro->slot;
673
674 if (slot)
560 { 675 {
561 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 676 rss += sizeof (slot->curstackinfo);
562 New (0, stack->sptr, STACKSIZE, long); 677 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
678 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
679 rss += slot->tmps_max * sizeof (SV *);
680 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
681 rss += slot->scopestack_max * sizeof (I32);
682 rss += slot->savestack_max * sizeof (ANY);
683
684#if !PERL_VERSION_ATLEAST (5,10,0)
685 rss += slot->retstack_max * sizeof (OP *);
686#endif
563 } 687 }
564 } 688 }
565 else
566 stack->sptr = 0;
567 689
568 ctx->stack = stack; 690 return rss;
691}
692
693/** coroutine stack handling ************************************************/
694
695static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
696static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
697static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
698
699/* apparently < 5.8.8 */
700#ifndef MgPV_nolen_const
701#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
702 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
703 (const char*)(mg)->mg_ptr)
704#endif
705
706/*
707 * This overrides the default magic get method of %SIG elements.
708 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
709 * and instead of tryign to save and restore the hash elements, we just provide
710 * readback here.
711 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
712 * not expecting this to actually change the hook. This is a potential problem
713 * when a schedule happens then, but we ignore this.
714 */
715static int
716coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
717{
718 const char *s = MgPV_nolen_const (mg);
719
720 if (*s == '_')
721 {
722 SV **svp = 0;
723
724 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
725 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
726
727 if (svp)
728 {
729 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
730 return 0;
731 }
732 }
733
734 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
735}
736
737static int
738coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
739{
740 const char *s = MgPV_nolen_const (mg);
741
742 if (*s == '_')
743 {
744 SV **svp = 0;
745
746 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
747 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
748
749 if (svp)
750 {
751 SV *old = *svp;
752 *svp = 0;
753 SvREFCNT_dec (old);
754 return 0;
755 }
756 }
757
758 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
759}
760
761static int
762coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
763{
764 const char *s = MgPV_nolen_const (mg);
765
766 if (*s == '_')
767 {
768 SV **svp = 0;
769
770 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
771 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
772
773 if (svp)
774 {
775 SV *old = *svp;
776 *svp = newSVsv (sv);
777 SvREFCNT_dec (old);
778 return 0;
779 }
780 }
781
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
569} 783}
570 784
571static void 785static void
572deallocate_stack (Coro__State ctx) 786coro_setup (pTHX_ struct coro *coro)
573{
574 coro_stack *stack = ctx->stack;
575
576 ctx->stack = 0;
577
578 if (stack)
579 {
580 if (!--stack->refcnt)
581 {
582#ifdef HAVE_MMAP
583 if (stack->ssize > 0 && stack->sptr)
584 munmap (stack->sptr, stack->ssize);
585 else
586#endif
587 Safefree (stack->sptr);
588
589 Safefree (stack);
590 }
591 else if (ctx->gencnt == stack->gencnt)
592 --stack->usecnt;
593 }
594}
595
596static void
597setup_coro (void *arg)
598{ 787{
599 /* 788 /*
600 * emulate part of the perl startup here. 789 * emulate part of the perl startup here.
601 */ 790 */
602 dTHX;
603 dSP;
604 Coro__State ctx = (Coro__State)arg;
605 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
606
607 coro_init_stacks (aTHX); 791 coro_init_stacks (aTHX);
608 /*PL_curcop = 0;*/ 792
609 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 793 PL_runops = RUNOPS_DEFAULT;
794 PL_curcop = &PL_compiling;
795 PL_in_eval = EVAL_NULL;
796 PL_comppad = 0;
797 PL_curpm = 0;
798 PL_curpad = 0;
799 PL_localizing = 0;
800 PL_dirty = 0;
801 PL_restartop = 0;
802#if PERL_VERSION_ATLEAST (5,10,0)
803 PL_parser = 0;
804#endif
805
806 /* recreate the die/warn hooks */
807 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
808 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
809
810 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
816
817 {
818 dSP;
819 LOGOP myop;
820
821 Zero (&myop, 1, LOGOP);
822 myop.op_next = Nullop;
823 myop.op_flags = OPf_WANT_VOID;
824
825 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
827 PUTBACK;
828 PL_op = (OP *)&myop;
829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
830 SPAGAIN;
831 }
832
833 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub.
835 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
836 * so we ENTER here for symmetry
837 */
838 ENTER;
839}
840
841static void
842coro_destroy (pTHX_ struct coro *coro)
843{
844 if (!IN_DESTRUCT)
845 {
846 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0);
848 assert (PL_tmps_floor == -1);
849
850 /* free all temporaries */
851 FREETMPS;
852 assert (PL_tmps_ix == -1);
853
854 /* unwind all extra stacks */
855 POPSTACK_TO (PL_mainstack);
856
857 /* unwind main stack */
858 dounwind (-1);
859 }
860
861 SvREFCNT_dec (GvSV (PL_defgv));
610 SvREFCNT_dec (GvAV (PL_defgv)); 862 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 863 SvREFCNT_dec (GvSV (PL_errgv));
864 SvREFCNT_dec (PL_defoutgv);
865 SvREFCNT_dec (PL_rs);
866 SvREFCNT_dec (GvSV (irsgv));
612 867
613 SPAGAIN; 868 SvREFCNT_dec (PL_diehook);
869 SvREFCNT_dec (PL_warnhook);
870
871 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw);
614 873
615 if (ctx->stack) 874 coro_destroy_stacks (aTHX);
616 {
617 ctx->cursp = 0;
618
619 PUSHMARK(SP);
620 PUTBACK;
621 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623 if (SvTRUE (ERRSV))
624 croak (NULL);
625 else
626 croak ("FATAL: CCTXT coroutine returned!");
627 }
628 else
629 {
630 UNOP myop;
631
632 Zero(&myop, 1, UNOP);
633 myop.op_next = Nullop;
634 myop.op_flags = OPf_WANT_VOID;
635
636 PL_op = (OP *)&myop;
637
638 PUSHMARK(SP);
639 XPUSHs (sub_init);
640 /*
641 * the next line is slightly wrong, as PL_op->op_next
642 * is actually being executed so we skip the first op.
643 * that doesn't matter, though, since it is only
644 * pp_nextstate and we never return...
645 * ah yes, and I don't care anyways ;)
646 */
647 PUTBACK;
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649 SPAGAIN;
650
651 ENTER; /* necessary e.g. for dounwind */
652 }
653} 875}
654 876
655static void 877static void
656continue_coro (void *arg) 878free_coro_mortal (pTHX)
657{ 879{
658 /* 880 if (expect_true (coro_mortal))
659 * this is a _very_ stripped down perl interpreter ;) 881 {
660 */ 882 SvREFCNT_dec (coro_mortal);
661 dTHX; 883 coro_mortal = 0;
662 Coro__State ctx = (Coro__State)arg;
663
664 PL_top_env = &PL_start_env;
665
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
671}
672
673/* never call directly, always through the coro_state_transfer global variable */
674static void
675transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
676{
677 dSTACKLEVEL;
678
679 if (prev != next)
680 { 884 }
681 /* has this coro been created yet? */ 885}
682 if (next->mainstack) 886
887static int
888runops_trace (pTHX)
889{
890 COP *oldcop = 0;
891 int oldcxix = -2;
892 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
893 coro_cctx *cctx = coro->cctx;
894
895 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
896 {
897 PERL_ASYNC_CHECK ();
898
899 if (cctx->flags & CC_TRACE_ALL)
683 { 900 {
684 LOCK; 901 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
685 SAVE (prev, flags);
686 LOAD (next);
687 UNLOCK;
688
689 /* mark this state as in-use */
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 { 902 {
696 if (!prev->stack) 903 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
697 allocate_stack (prev, 0); 904 SV **bot, **top;
698 else if (prev->cursp != stacklevel 905 AV *av = newAV (); /* return values */
699 && prev->stack->usecnt > 1) 906 SV **cb;
907 dSP;
908
909 GV *gv = CvGV (cx->blk_sub.cv);
910 SV *fullname = sv_2mortal (newSV (0));
911 if (isGV (gv))
912 gv_efullname3 (fullname, gv, 0);
913
914 bot = PL_stack_base + cx->blk_oldsp + 1;
915 top = cx->blk_gimme == G_ARRAY ? SP + 1
916 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot;
918
919 av_extend (av, top - bot);
920 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++));
922
923 PL_runops = RUNOPS_DEFAULT;
924 ENTER;
925 SAVETMPS;
926 EXTEND (SP, 3);
927 PUSHMARK (SP);
928 PUSHs (&PL_sv_no);
929 PUSHs (fullname);
930 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
931 PUTBACK;
932 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
933 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
934 SPAGAIN;
935 FREETMPS;
936 LEAVE;
937 PL_runops = runops_trace;
938 }
939
940 if (oldcop != PL_curcop)
941 {
942 oldcop = PL_curcop;
943
944 if (PL_curcop != &PL_compiling)
700 { 945 {
701 prev->gencnt = ++prev->stack->gencnt; 946 SV **cb;
702 prev->stack->usecnt = 1;
703 }
704 947
705 /* has our stack been invalidated? */ 948 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 { 949 {
708 deallocate_stack (next); 950 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
709 allocate_stack (next, 1); 951
710 coro_create (&(next->stack->cctx), 952 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
711 continue_coro, (void *)next, 953 {
712 next->stack->sptr, labs (next->stack->ssize)); 954 runops_proc_t old_runops = PL_runops;
955 dSP;
956 GV *gv = CvGV (cx->blk_sub.cv);
957 SV *fullname = sv_2mortal (newSV (0));
958
959 if (isGV (gv))
960 gv_efullname3 (fullname, gv, 0);
961
962 PL_runops = RUNOPS_DEFAULT;
963 ENTER;
964 SAVETMPS;
965 EXTEND (SP, 3);
966 PUSHMARK (SP);
967 PUSHs (&PL_sv_yes);
968 PUSHs (fullname);
969 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
970 PUTBACK;
971 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
972 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
973 SPAGAIN;
974 FREETMPS;
975 LEAVE;
976 PL_runops = runops_trace;
977 }
978
979 oldcxix = cxstack_ix;
713 } 980 }
714 981
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 982 if (cctx->flags & CC_TRACE_LINE)
716 prev->cursp = stacklevel;
717 /* don't add any code here */
718 }
719 else
720 next->cursp = stacklevel;
721 }
722 else if (next->tmps_ix == -2)
723 croak ("tried to transfer to running coroutine");
724 else
725 {
726 LOCK;
727 SAVE (prev, -1); /* first get rid of the old state */
728 UNLOCK;
729
730 /* create the coroutine for the first time */
731 if (flags & TRANSFER_SAVE_CCTXT)
732 {
733 if (!prev->stack)
734 allocate_stack (prev, 0);
735
736 /* the new coroutine starts with start_env again */
737 PL_top_env = &PL_start_env;
738
739 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
740 { 983 {
741 setup_coro (next); 984 dSP;
742 next->cursp = stacklevel;
743 985
744 prev->stack->refcnt++; 986 PL_runops = RUNOPS_DEFAULT;
745 prev->stack->usecnt++; 987 ENTER;
746 next->stack = prev->stack; 988 SAVETMPS;
747 next->gencnt = prev->gencnt; 989 EXTEND (SP, 3);
990 PL_runops = RUNOPS_DEFAULT;
991 PUSHMARK (SP);
992 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
993 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
994 PUTBACK;
995 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
996 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
997 SPAGAIN;
998 FREETMPS;
999 LEAVE;
1000 PL_runops = runops_trace;
748 } 1001 }
749 else
750 {
751 assert (!next->stack);
752 allocate_stack (next, 1);
753 coro_create (&(next->stack->cctx),
754 setup_coro, (void *)next,
755 next->stack->sptr, labs (next->stack->ssize));
756 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
757 prev->cursp = stacklevel;
758 /* don't add any code here */
759 } 1002 }
760 } 1003 }
1004 }
1005 }
1006
1007 TAINT_NOT;
1008 return 0;
1009}
1010
1011/* inject a fake call to Coro::State::_cctx_init into the execution */
1012/* _cctx_init should be careful, as it could be called at almost any time */
1013/* during execution of a perl program */
1014static void NOINLINE
1015cctx_prepare (pTHX_ coro_cctx *cctx)
1016{
1017 dSP;
1018 LOGOP myop;
1019
1020 PL_top_env = &PL_start_env;
1021
1022 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace;
1024
1025 Zero (&myop, 1, LOGOP);
1026 myop.op_next = PL_op;
1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1028
1029 PUSHMARK (SP);
1030 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1033 PUTBACK;
1034 PL_op = (OP *)&myop;
1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1036 SPAGAIN;
1037}
1038
1039/*
1040 * this is a _very_ stripped down perl interpreter ;)
1041 */
1042static void
1043cctx_run (void *arg)
1044{
1045 dTHX;
1046
1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1048 UNLOCK;
1049
1050 /* we now skip the entersub that lead to transfer() */
1051 PL_op = PL_op->op_next;
1052
1053 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055
1056 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op;
1058 perl_run (PL_curinterp);
1059
1060 /*
1061 * If perl-run returns we assume exit() was being called or the coro
1062 * fell off the end, which seems to be the only valid (non-bug)
1063 * reason for perl_run to return. We try to exit by jumping to the
1064 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept
1066 */
1067 PL_top_env = main_top_env;
1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1069}
1070
1071static coro_cctx *
1072cctx_new ()
1073{
1074 coro_cctx *cctx;
1075 void *stack_start;
1076 size_t stack_size;
1077
1078 ++cctx_count;
1079
1080 Newz (0, cctx, 1, coro_cctx);
1081
1082#if HAVE_MMAP
1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1084 /* mmap supposedly does allocate-on-write for us */
1085 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1086
1087 if (cctx->sptr != (void *)-1)
1088 {
1089# if CORO_STACKGUARD
1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1091# endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED;
1095 }
1096 else
1097#endif
1098 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long);
1101
1102 if (!cctx->sptr)
1103 {
1104 perror ("FATAL: unable to allocate stack for coroutine");
1105 _exit (EXIT_FAILURE);
1106 }
1107
1108 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize;
1110 }
1111
1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1114
1115 return cctx;
1116}
1117
1118static void
1119cctx_destroy (coro_cctx *cctx)
1120{
1121 if (!cctx)
1122 return;
1123
1124 --cctx_count;
1125
1126#if CORO_USE_VALGRIND
1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1128#endif
1129
1130#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED)
1132 munmap (cctx->sptr, cctx->ssize);
1133 else
1134#endif
1135 Safefree (cctx->sptr);
1136
1137 Safefree (cctx);
1138}
1139
1140/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1142
1143static coro_cctx *
1144cctx_get (pTHX)
1145{
1146 while (expect_true (cctx_first))
1147 {
1148 coro_cctx *cctx = cctx_first;
1149 cctx_first = cctx->next;
1150 --cctx_idle;
1151
1152 if (expect_true (!CCTX_EXPIRED (cctx)))
1153 return cctx;
1154
1155 cctx_destroy (cctx);
1156 }
1157
1158 return cctx_new ();
1159}
1160
1161static void
1162cctx_put (coro_cctx *cctx)
1163{
1164 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1166 {
1167 coro_cctx *first = cctx_first;
1168 cctx_first = first->next;
1169 --cctx_idle;
1170
1171 cctx_destroy (first);
1172 }
1173
1174 ++cctx_idle;
1175 cctx->next = cctx_first;
1176 cctx_first = cctx;
1177}
1178
1179/** coroutine switching *****************************************************/
1180
1181static void
1182transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{
1184 if (expect_true (prev != next))
1185 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1187 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1188
1189 if (expect_false (next->flags & CF_RUNNING))
1190 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1191
1192 if (expect_false (next->flags & CF_DESTROYED))
1193 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1194
1195#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1197 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1198#endif
1199 }
1200}
1201
1202/* always use the TRANSFER macro */
1203static void NOINLINE
1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1205{
1206 dSTACKLEVEL;
1207 static volatile int has_throw;
1208
1209 /* sometimes transfer is only called to set idle_sp */
1210 if (expect_false (!next))
1211 {
1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1213 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1214 }
1215 else if (expect_true (prev != next))
1216 {
1217 coro_cctx *prev__cctx;
1218
1219 if (expect_false (prev->flags & CF_NEW))
1220 {
1221 /* create a new empty context */
1222 Newz (0, prev->cctx, 1, coro_cctx);
1223 prev->flags &= ~CF_NEW;
1224 prev->flags |= CF_RUNNING;
1225 }
1226
1227 prev->flags &= ~CF_RUNNING;
1228 next->flags |= CF_RUNNING;
1229
1230 LOCK;
1231
1232 /* first get rid of the old state */
1233 save_perl (aTHX_ prev);
1234
1235 if (expect_false (next->flags & CF_NEW))
1236 {
1237 /* need to start coroutine */
1238 next->flags &= ~CF_NEW;
1239 /* setup coroutine call */
1240 coro_setup (aTHX_ next);
1241 }
761 else 1242 else
1243 load_perl (aTHX_ next);
1244
1245 prev__cctx = prev->cctx;
1246
1247 /* possibly "free" the cctx */
1248 if (expect_true (
1249 prev__cctx->idle_sp == STACKLEVEL
1250 && !(prev__cctx->flags & CC_TRACE)
1251 && !force_cctx
1252 ))
1253 {
1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1255 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1256
1257 prev->cctx = 0;
1258
1259 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1260 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1261 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1262 if (!next->cctx)
1263 next->cctx = cctx_get (aTHX);
1264
1265 cctx_put (prev__cctx);
1266 }
1267
1268 ++next->usecount;
1269
1270 if (expect_true (!next->cctx))
1271 next->cctx = cctx_get (aTHX);
1272
1273 has_throw = !!next->throw;
1274
1275 if (expect_false (prev__cctx != next->cctx))
1276 {
1277 prev__cctx->top_env = PL_top_env;
1278 PL_top_env = next->cctx->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1280 }
1281
1282 free_coro_mortal (aTHX);
1283 UNLOCK;
1284
1285 if (expect_false (has_throw))
1286 {
1287 struct coro *coro = SvSTATE (coro_current);
1288
1289 if (coro->throw)
762 { 1290 {
1291 SV *exception = coro->throw;
1292 coro->throw = 0;
1293 sv_setsv (ERRSV, exception);
763 setup_coro (next); 1294 croak (0);
764 next->cursp = stacklevel;
765 } 1295 }
766 } 1296 }
767 } 1297 }
768
769 LOCK;
770 if (coro_mortal)
771 {
772 SvREFCNT_dec (coro_mortal);
773 coro_mortal = 0;
774 }
775 UNLOCK;
776} 1298}
777 1299
778/* use this function pointer to call the above function */ 1300struct transfer_args
779/* this is done to increase chances of the compiler not inlining the call */ 1301{
780void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl; 1302 struct coro *prev, *next;
1303};
781 1304
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1306#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1307
1308/** high level stuff ********************************************************/
1309
782static void 1310static int
783coro_state_destroy (struct coro *coro) 1311coro_state_destroy (pTHX_ struct coro *coro)
784{ 1312{
785 if (coro->refcnt--) 1313 if (coro->flags & CF_DESTROYED)
786 return; 1314 return 0;
1315
1316 coro->flags |= CF_DESTROYED;
1317
1318 if (coro->flags & CF_READY)
1319 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready;
1324 UNLOCK;
1325 }
1326 else
1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
787 1328
788 if (coro->mainstack && coro->mainstack != main_mainstack) 1329 if (coro->mainstack && coro->mainstack != main_mainstack)
789 { 1330 {
790 struct coro temp; 1331 struct coro temp;
791 1332
792 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1333 if (coro->flags & CF_RUNNING)
1334 croak ("FATAL: tried to destroy currently running coroutine");
1335
1336 save_perl (aTHX_ &temp);
793 LOAD (aTHX_ coro); 1337 load_perl (aTHX_ coro);
794 1338
795 destroy_stacks (aTHX); 1339 coro_destroy (aTHX_ coro);
796 1340
797 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1341 load_perl (aTHX_ &temp);
798 1342
799 coro->mainstack = 0; 1343 coro->slot = 0;
800 } 1344 }
801 1345
802 deallocate_stack (coro); 1346 cctx_destroy (coro->cctx);
803 SvREFCNT_dec (coro->args); 1347 SvREFCNT_dec (coro->args);
804 Safefree (coro); 1348
1349 if (coro->next) coro->next->prev = coro->prev;
1350 if (coro->prev) coro->prev->next = coro->next;
1351 if (coro == coro_first) coro_first = coro->next;
1352
1353 return 1;
805} 1354}
806 1355
807static int 1356static int
808coro_state_clear (SV *sv, MAGIC *mg) 1357coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809{ 1358{
810 struct coro *coro = (struct coro *)mg->mg_ptr; 1359 struct coro *coro = (struct coro *)mg->mg_ptr;
811 mg->mg_ptr = 0; 1360 mg->mg_ptr = 0;
812 1361
1362 coro->hv = 0;
1363
1364 if (--coro->refcnt < 0)
1365 {
813 coro_state_destroy (coro); 1366 coro_state_destroy (aTHX_ coro);
1367 Safefree (coro);
1368 }
814 1369
815 return 0; 1370 return 0;
816} 1371}
817 1372
818static int 1373static int
819coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1374coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
820{ 1375{
821 struct coro *coro = (struct coro *)mg->mg_ptr; 1376 struct coro *coro = (struct coro *)mg->mg_ptr;
822 1377
823 ++coro->refcnt; 1378 ++coro->refcnt;
824 1379
825 return 0; 1380 return 0;
826} 1381}
827 1382
828static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1383static MGVTBL coro_state_vtbl = {
829 1384 0, 0, 0, 0,
830static struct coro * 1385 coro_state_free,
831SvSTATE (SV *coro) 1386 0,
832{ 1387#ifdef MGf_DUP
833 HV *stash; 1388 coro_state_dup,
834 MAGIC *mg; 1389#else
835 1390# define MGf_DUP 0
836 if (SvROK (coro)) 1391#endif
837 coro = SvRV (coro); 1392};
838
839 stash = SvSTASH (coro);
840 if (stash != coro_stash && stash != coro_state_stash)
841 {
842 /* very slow, but rare, check */
843 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
844 croak ("Coro::State object required");
845 }
846
847 mg = SvMAGIC (coro);
848 assert (mg->mg_type == PERL_MAGIC_ext);
849 return (struct coro *)mg->mg_ptr;
850}
851 1393
852static void 1394static void
1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1396{
1397 ta->prev = SvSTATE (prev_sv);
1398 ta->next = SvSTATE (next_sv);
1399 TRANSFER_CHECK (*ta);
1400}
1401
1402static void
853api_transfer (pTHX_ SV *prev, SV *next, int flags) 1403api_transfer (SV *prev_sv, SV *next_sv)
854{ 1404{
855 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1405 dTHX;
1406 struct transfer_args ta;
1407
1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1409 TRANSFER (ta, 1);
856} 1410}
857 1411
858/** Coro ********************************************************************/ 1412/** Coro ********************************************************************/
859 1413
860#define PRIO_MAX 3
861#define PRIO_HIGH 1
862#define PRIO_NORMAL 0
863#define PRIO_LOW -1
864#define PRIO_IDLE -3
865#define PRIO_MIN -4
866
867/* for Coro.pm */
868static GV *coro_current, *coro_idle;
869static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870static int coro_nready;
871
872static void 1414static void
873coro_enq (pTHX_ SV *sv) 1415coro_enq (pTHX_ SV *coro_sv)
1416{
1417 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1418}
1419
1420static SV *
1421coro_deq (pTHX)
874{ 1422{
875 int prio; 1423 int prio;
876 1424
877 if (SvTYPE (sv) != SVt_PVHV)
878 croak ("Coro::ready tried to enqueue something that is not a coroutine");
879
880 prio = SvSTATE (sv)->prio;
881
882 av_push (coro_ready [prio - PRIO_MIN], sv);
883 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; ) 1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
896 if (AvFILLp (coro_ready [prio]) >= 0) 1426 if (AvFILLp (coro_ready [prio]) >= 0)
897 {
898 coro_nready--;
899 return av_shift (coro_ready [prio]); 1427 return av_shift (coro_ready [prio]);
900 }
901 1428
902 return 0; 1429 return 0;
903} 1430}
904 1431
1432static int
1433api_ready (SV *coro_sv)
1434{
1435 dTHX;
1436 struct coro *coro;
1437 SV *sv_hook;
1438 void (*xs_hook)(void);
1439
1440 if (SvROK (coro_sv))
1441 coro_sv = SvRV (coro_sv);
1442
1443 coro = SvSTATE (coro_sv);
1444
1445 if (coro->flags & CF_READY)
1446 return 0;
1447
1448 coro->flags |= CF_READY;
1449
1450 LOCK;
1451
1452 sv_hook = coro_nready ? 0 : coro_readyhook;
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1454
1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1456 ++coro_nready;
1457
1458 UNLOCK;
1459
1460 if (sv_hook)
1461 {
1462 dSP;
1463
1464 ENTER;
1465 SAVETMPS;
1466
1467 PUSHMARK (SP);
1468 PUTBACK;
1469 call_sv (sv_hook, G_DISCARD);
1470 SPAGAIN;
1471
1472 FREETMPS;
1473 LEAVE;
1474 }
1475
1476 if (xs_hook)
1477 xs_hook ();
1478
1479 return 1;
1480}
1481
1482static int
1483api_is_ready (SV *coro_sv)
1484{
1485 dTHX;
1486 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1487}
1488
905static void 1489static void
906api_ready (SV *coro) 1490prepare_schedule (pTHX_ struct transfer_args *ta)
907{ 1491{
908 dTHX; 1492 SV *prev_sv, *next_sv;
909 1493
910 if (SvROK (coro)) 1494 for (;;)
911 coro = SvRV (coro); 1495 {
1496 LOCK;
1497 next_sv = coro_deq (aTHX);
1498
1499 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv))
1501 {
1502 dSP;
1503 UNLOCK;
1504
1505 ENTER;
1506 SAVETMPS;
1507
1508 PUSHMARK (SP);
1509 PUTBACK;
1510 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1511 SPAGAIN;
1512
1513 FREETMPS;
1514 LEAVE;
1515 continue;
1516 }
1517
1518 ta->next = SvSTATE (next_sv);
1519
1520 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */
1526 continue;
1527 }
1528
1529 --coro_nready;
1530 UNLOCK;
1531 break;
1532 }
1533
1534 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current);
1536 ta->prev = SvSTATE (prev_sv);
1537 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY);
1539 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv);
912 1541
913 LOCK; 1542 LOCK;
914 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1543 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv;
915 UNLOCK; 1545 UNLOCK;
1546}
1547
1548static void
1549prepare_cede (pTHX_ struct transfer_args *ta)
1550{
1551 api_ready (coro_current);
1552 prepare_schedule (aTHX_ ta);
1553}
1554
1555static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta)
1557{
1558 if (coro_nready)
1559 {
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta);
1562 api_ready (prev);
1563 return 1;
1564 }
1565 else
1566 return 0;
916} 1567}
917 1568
918static void 1569static void
919api_schedule (void) 1570api_schedule (void)
920{ 1571{
921 dTHX; 1572 dTHX;
1573 struct transfer_args ta;
922 1574
923 SV *prev, *next; 1575 prepare_schedule (aTHX_ &ta);
924 SV *current = GvSV (coro_current); 1576 TRANSFER (ta, 1);
1577}
925 1578
926 for (;;) 1579static int
927 { 1580api_cede (void)
928 LOCK; 1581{
1582 dTHX;
1583 struct transfer_args ta;
929 1584
930 next = coro_deq (aTHX_ PRIO_MIN); 1585 prepare_cede (aTHX_ &ta);
931 1586
932 if (next) 1587 if (expect_true (ta.prev != ta.next))
933 break;
934
935 UNLOCK;
936
937 { 1588 {
938 dSP; 1589 TRANSFER (ta, 1);
939 1590 return 1;
940 ENTER;
941 SAVETMPS;
942
943 PUSHMARK (SP);
944 PUTBACK;
945 call_sv (GvSV (coro_idle), G_DISCARD);
946
947 FREETMPS;
948 LEAVE;
949 } 1591 }
1592 else
1593 return 0;
1594}
1595
1596static int
1597api_cede_notself (void)
1598{
1599 dTHX;
1600 struct transfer_args ta;
1601
1602 if (prepare_cede_notself (aTHX_ &ta))
950 } 1603 {
951 1604 TRANSFER (ta, 1);
952 prev = SvRV (current); 1605 return 1;
953 SvRV (current) = next; 1606 }
954 1607 else
955 /* free this only after the transfer */ 1608 return 0;
956 coro_mortal = prev;
957
958 UNLOCK;
959
960 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962} 1609}
963 1610
964static void 1611static void
965api_cede (void) 1612api_trace (SV *coro_sv, int flags)
966{ 1613{
967 dTHX; 1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv);
968 1616
969 LOCK; 1617 if (flags & CC_TRACE)
970 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1618 {
971 UNLOCK; 1619 if (!coro->cctx)
1620 coro->cctx = cctx_new ();
1621 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack");
972 1623
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 {
1628 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1629
1630 if (coro->flags & CF_RUNNING)
1631 PL_runops = RUNOPS_DEFAULT;
1632 else
1633 coro->slot->runops = RUNOPS_DEFAULT;
1634 }
1635}
1636
1637static int
1638coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1639{
1640 AV *padlist;
1641 AV *av = (AV *)mg->mg_obj;
1642
1643 abort ();
1644
1645 return 0;
1646}
1647
1648static MGVTBL coro_gensub_vtbl = {
1649 0, 0, 0, 0,
1650 coro_gensub_free
1651};
1652
1653/*****************************************************************************/
1654/* PerlIO::cede */
1655
1656typedef struct
1657{
1658 PerlIOBuf base;
1659 NV next, every;
1660} PerlIOCede;
1661
1662static IV
1663PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1664{
1665 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1666
1667 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1668 self->next = nvtime () + self->every;
1669
1670 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1671}
1672
1673static SV *
1674PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1675{
1676 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1677
1678 return newSVnv (self->every);
1679}
1680
1681static IV
1682PerlIOCede_flush (pTHX_ PerlIO *f)
1683{
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime ();
1686
1687 if (now >= self->next)
1688 {
973 api_schedule (); 1689 api_cede ();
974} 1690 self->next = now + self->every;
1691 }
975 1692
1693 return PerlIOBuf_flush (aTHX_ f);
1694}
1695
1696static PerlIO_funcs PerlIO_cede =
1697{
1698 sizeof(PerlIO_funcs),
1699 "cede",
1700 sizeof(PerlIOCede),
1701 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1702 PerlIOCede_pushed,
1703 PerlIOBuf_popped,
1704 PerlIOBuf_open,
1705 PerlIOBase_binmode,
1706 PerlIOCede_getarg,
1707 PerlIOBase_fileno,
1708 PerlIOBuf_dup,
1709 PerlIOBuf_read,
1710 PerlIOBuf_unread,
1711 PerlIOBuf_write,
1712 PerlIOBuf_seek,
1713 PerlIOBuf_tell,
1714 PerlIOBuf_close,
1715 PerlIOCede_flush,
1716 PerlIOBuf_fill,
1717 PerlIOBase_eof,
1718 PerlIOBase_error,
1719 PerlIOBase_clearerr,
1720 PerlIOBase_setlinebuf,
1721 PerlIOBuf_get_base,
1722 PerlIOBuf_bufsiz,
1723 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt,
1726};
1727
1728
976MODULE = Coro::State PACKAGE = Coro::State 1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977 1730
978PROTOTYPES: DISABLE 1731PROTOTYPES: DISABLE
979 1732
980BOOT: 1733BOOT:
981{ 1734{
982#ifdef USE_ITHREADS 1735#ifdef USE_ITHREADS
983 MUTEX_INIT (&coro_mutex); 1736 MUTEX_INIT (&coro_mutex);
984#endif 1737#endif
985 BOOT_PAGESIZE; 1738 BOOT_PAGESIZE;
986 1739
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1742
1743 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1744 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1745 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1746
1747 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1748 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1749 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1750
987 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1751 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
988 1752
989 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1753 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
990 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1754 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
991 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1755 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
992 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1756 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
993 1757
994 main_mainstack = PL_mainstack; 1758 main_mainstack = PL_mainstack;
1759 main_top_env = PL_top_env;
995 1760
1761 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev;
1763
996 coroapi.ver = CORO_API_VERSION; 1764 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION;
997 coroapi.transfer = api_transfer; 1766 coroapi.transfer = api_transfer;
1767
1768 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770
1771 if (!svp) croak ("Time::HiRes is required");
1772 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1773
1774 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1775 }
998 1776
999 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1777 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1000} 1778}
1001 1779
1002SV * 1780SV *
1003new (char *klass, ...) 1781new (char *klass, ...)
1004 CODE: 1782 CODE:
1005{ 1783{
1006 struct coro *coro; 1784 struct coro *coro;
1785 MAGIC *mg;
1007 HV *hv; 1786 HV *hv;
1008 int i; 1787 int i;
1009 1788
1010 Newz (0, coro, 1, struct coro); 1789 Newz (0, coro, 1, struct coro);
1011 coro->args = newAV (); 1790 coro->args = newAV ();
1791 coro->flags = CF_NEW;
1012 1792
1793 if (coro_first) coro_first->prev = coro;
1794 coro->next = coro_first;
1795 coro_first = coro;
1796
1797 coro->hv = hv = newHV ();
1798 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1799 mg->mg_flags |= MGf_DUP;
1800 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1801
1802 av_extend (coro->args, items - 1);
1013 for (i = 1; i < items; i++) 1803 for (i = 1; i < items; i++)
1014 av_push (coro->args, newSVsv (ST (i))); 1804 av_push (coro->args, newSVsv (ST (i)));
1015
1016 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1017 /*coro->stack = 0;*/
1018
1019 hv = newHV ();
1020 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1021 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1022} 1805}
1023 OUTPUT: 1806 OUTPUT:
1024 RETVAL 1807 RETVAL
1025 1808
1809# these not obviously related functions are all rolled into the same xs
1810# function to increase chances that they all will call transfer with the same
1811# stack offset
1026void 1812void
1027transfer(prev, next, flags) 1813_set_stacklevel (...)
1028 SV *prev 1814 ALIAS:
1029 SV *next 1815 Coro::State::transfer = 1
1030 int flags 1816 Coro::schedule = 2
1817 Coro::cede = 3
1818 Coro::cede_notself = 4
1031 CODE: 1819 CODE:
1820{
1821 struct transfer_args ta;
1822
1032 PUTBACK; 1823 PUTBACK;
1033 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1824 switch (ix)
1825 {
1826 case 0:
1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1828 ta.next = 0;
1829 break;
1830
1831 case 1:
1832 if (items != 2)
1833 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1834
1835 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1836 break;
1837
1838 case 2:
1839 prepare_schedule (aTHX_ &ta);
1840 break;
1841
1842 case 3:
1843 prepare_cede (aTHX_ &ta);
1844 break;
1845
1846 case 4:
1847 if (!prepare_cede_notself (aTHX_ &ta))
1848 XSRETURN_EMPTY;
1849
1850 break;
1851 }
1034 SPAGAIN; 1852 SPAGAIN;
1035 1853
1036int 1854 BARRIER;
1037prio (Coro::State coro, int newprio = 0) 1855 PUTBACK;
1038 ALIAS: 1856 TRANSFER (ta, 0);
1039 nice = 1 1857 SPAGAIN; /* might be the sp of a different coroutine now */
1040 CODE: 1858 /* be extra careful not to ever do anything after TRANSFER */
1041{
1042 RETVAL = coro->prio;
1043
1044 if (items > 1)
1045 {
1046 if (ix)
1047 newprio += coro->prio;
1048
1049 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1050 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1051
1052 coro->prio = newprio;
1053 }
1054} 1859}
1860
1861bool
1862_destroy (SV *coro_sv)
1863 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1865 OUTPUT:
1866 RETVAL
1055 1867
1056void 1868void
1057_clone_state_from (SV *dst, SV *src)
1058 CODE:
1059{
1060 struct coro *coro_src = SvSTATE (src);
1061
1062 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1063
1064 ++coro_src->refcnt;
1065 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1066}
1067
1068void
1069_exit (code) 1869_exit (int code)
1070 int code
1071 PROTOTYPE: $ 1870 PROTOTYPE: $
1072 CODE: 1871 CODE:
1073 _exit (code); 1872 _exit (code);
1074 1873
1075MODULE = Coro::State PACKAGE = Coro::Cont 1874int
1875cctx_stacksize (int new_stacksize = 0)
1876 CODE:
1877 RETVAL = coro_stacksize;
1878 if (new_stacksize)
1879 coro_stacksize = new_stacksize;
1880 OUTPUT:
1881 RETVAL
1882
1883int
1884cctx_count ()
1885 CODE:
1886 RETVAL = cctx_count;
1887 OUTPUT:
1888 RETVAL
1889
1890int
1891cctx_idle ()
1892 CODE:
1893 RETVAL = cctx_idle;
1894 OUTPUT:
1895 RETVAL
1076 1896
1077void 1897void
1078yield (...) 1898list ()
1079 PROTOTYPE: @ 1899 PPCODE:
1900{
1901 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv)
1904 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1905}
1906
1907void
1908call (Coro::State coro, SV *coderef)
1909 ALIAS:
1910 eval = 1
1911 CODE:
1912{
1913 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1914 {
1915 struct coro temp;
1916
1917 if (!(coro->flags & CF_RUNNING))
1918 {
1919 PUTBACK;
1920 save_perl (aTHX_ &temp);
1921 load_perl (aTHX_ coro);
1922 }
1923
1924 {
1925 dSP;
1926 ENTER;
1927 SAVETMPS;
1928 PUTBACK;
1929 PUSHSTACK;
1930 PUSHMARK (SP);
1931
1932 if (ix)
1933 eval_sv (coderef, 0);
1934 else
1935 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1936
1937 POPSTACK;
1938 SPAGAIN;
1939 FREETMPS;
1940 LEAVE;
1941 PUTBACK;
1942 }
1943
1944 if (!(coro->flags & CF_RUNNING))
1945 {
1946 save_perl (aTHX_ coro);
1947 load_perl (aTHX_ &temp);
1948 SPAGAIN;
1949 }
1950 }
1951}
1952
1953SV *
1954is_ready (Coro::State coro)
1955 PROTOTYPE: $
1956 ALIAS:
1957 is_ready = CF_READY
1958 is_running = CF_RUNNING
1959 is_new = CF_NEW
1960 is_destroyed = CF_DESTROYED
1961 CODE:
1962 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT:
1964 RETVAL
1965
1966void
1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1968
1969SV *
1970has_cctx (Coro::State coro)
1971 PROTOTYPE: $
1972 CODE:
1973 RETVAL = boolSV (!!coro->cctx);
1974 OUTPUT:
1975 RETVAL
1976
1977int
1978is_traced (Coro::State coro)
1979 PROTOTYPE: $
1980 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT:
1983 RETVAL
1984
1985IV
1986rss (Coro::State coro)
1987 PROTOTYPE: $
1988 ALIAS:
1989 usecount = 1
1080 CODE: 1990 CODE:
1081{ 1991 switch (ix)
1082 SV *yieldstack; 1992 {
1083 SV *sv; 1993 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1084 AV *defav = GvAV (PL_defgv); 1994 case 1: RETVAL = coro->usecount; break;
1085 struct coro *prev, *next;
1086
1087 yieldstack = *hv_fetch (
1088 (HV *)SvRV (GvSV (coro_current)),
1089 "yieldstack", sizeof ("yieldstack") - 1,
1090 0 1995 }
1091 ); 1996 OUTPUT:
1997 RETVAL
1092 1998
1093 /* set up @_ -- ugly */ 1999void
1094 av_clear (defav); 2000force_cctx ()
1095 av_fill (defav, items - 1); 2001 CODE:
1096 while (items--) 2002 struct coro *coro = SvSTATE (coro_current);
1097 av_store (defav, items, SvREFCNT_inc (ST(items))); 2003 coro->cctx->idle_sp = 0;
1098 2004
1099 sv = av_pop ((AV *)SvRV (yieldstack)); 2005void
1100 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0)); 2006throw (Coro::State self, SV *throw = &PL_sv_undef)
1101 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0)); 2007 PROTOTYPE: $;$
2008 CODE:
1102 SvREFCNT_dec (sv); 2009 SvREFCNT_dec (self->throw);
2010 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1103 2011
1104 coro_state_transfer (aTHX_ prev, next, 0); 2012void
1105} 2013swap_defsv (Coro::State self)
2014 PROTOTYPE: $
2015 ALIAS:
2016 swap_defav = 1
2017 CODE:
2018 if (!self->slot)
2019 croak ("cannot swap state with coroutine that has no saved state");
2020 else
2021 {
2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2024
2025 SV *tmp = *src; *src = *dst; *dst = tmp;
2026 }
1106 2027
1107MODULE = Coro::State PACKAGE = Coro 2028MODULE = Coro::State PACKAGE = Coro
1108 2029
1109BOOT: 2030BOOT:
1110{ 2031{
1111 int i; 2032 int i;
1112 2033
2034 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2035 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2036 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2037
2038 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2039 SvREADONLY_on (coro_current);
2040
1113 coro_stash = gv_stashpv ("Coro", TRUE); 2041 coro_stash = gv_stashpv ("Coro", TRUE);
1114 2042
1115 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2043 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1116 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2044 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1117 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2045 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1118 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2046 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1119 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2047 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1120 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2048 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1121 2049
1122 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1123 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1124
1125 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1126 coro_ready[i] = newAV (); 2051 coro_ready[i] = newAV ();
1127 2052
1128 { 2053 {
1129 SV *sv = perl_get_sv("Coro::API", 1); 2054 SV *sv = perl_get_sv ("Coro::API", TRUE);
2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1130 2056
1131 coroapi.schedule = api_schedule; 2057 coroapi.schedule = api_schedule;
1132 coroapi.cede = api_cede; 2058 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself;
1133 coroapi.ready = api_ready; 2060 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready;
1134 coroapi.nready = &coro_nready; 2062 coroapi.nready = &coro_nready;
1135 coroapi.current = coro_current; 2063 coroapi.current = coro_current;
1136 2064
1137 GCoroAPI = &coroapi; 2065 GCoroAPI = &coroapi;
1138 sv_setiv (sv, (IV)&coroapi); 2066 sv_setiv (sv, (IV)&coroapi);
1139 SvREADONLY_on (sv); 2067 SvREADONLY_on (sv);
1140 } 2068 }
1141} 2069}
1142 2070
1143#if !PERL_MICRO
1144
1145void 2071void
1146ready (self) 2072_set_current (SV *current)
1147 SV * self
1148 PROTOTYPE: $ 2073 PROTOTYPE: $
1149 CODE: 2074 CODE:
1150 api_ready (self); 2075 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1151 2077
1152#endif 2078void
2079_set_readyhook (SV *hook)
2080 PROTOTYPE: $
2081 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook);
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2085 UNLOCK;
2086
2087int
2088prio (Coro::State coro, int newprio = 0)
2089 ALIAS:
2090 nice = 1
2091 CODE:
2092{
2093 RETVAL = coro->prio;
2094
2095 if (items > 1)
2096 {
2097 if (ix)
2098 newprio = coro->prio - newprio;
2099
2100 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2101 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2102
2103 coro->prio = newprio;
2104 }
2105}
2106 OUTPUT:
2107 RETVAL
2108
2109SV *
2110ready (SV *self)
2111 PROTOTYPE: $
2112 CODE:
2113 RETVAL = boolSV (api_ready (self));
2114 OUTPUT:
2115 RETVAL
1153 2116
1154int 2117int
1155nready (...) 2118nready (...)
1156 PROTOTYPE: 2119 PROTOTYPE:
1157 CODE: 2120 CODE:
1158 RETVAL = coro_nready; 2121 RETVAL = coro_nready;
1159 OUTPUT: 2122 OUTPUT:
1160 RETVAL 2123 RETVAL
1161 2124
2125# for async_pool speedup
1162void 2126void
1163schedule (...) 2127_pool_1 (SV *cb)
1164 PROTOTYPE:
1165 CODE: 2128 CODE:
1166 api_schedule (); 2129{
2130 struct coro *coro = SvSTATE (coro_current);
2131 HV *hv = (HV *)SvRV (coro_current);
2132 AV *defav = GvAV (PL_defgv);
2133 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2134 AV *invoke_av;
2135 int i, len;
2136
2137 if (!invoke)
2138 {
2139 SV *old = PL_diehook;
2140 PL_diehook = 0;
2141 SvREFCNT_dec (old);
2142 croak ("\3async_pool terminate\2\n");
2143 }
2144
2145 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2147
2148 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150
2151 invoke_av = (AV *)SvRV (invoke);
2152 len = av_len (invoke_av);
2153
2154 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2155
2156 if (len > 0)
2157 {
2158 av_fill (defav, len - 1);
2159 for (i = 0; i < len; ++i)
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2161 }
2162
2163 SvREFCNT_dec (invoke);
2164}
1167 2165
1168void 2166void
1169cede (...) 2167_pool_2 (SV *cb)
1170 PROTOTYPE:
1171 CODE: 2168 CODE:
1172 api_cede (); 2169{
2170 struct coro *coro = SvSTATE (coro_current);
1173 2171
1174# and these are hacks 2172 sv_setsv (cb, &PL_sv_undef);
2173
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0;
2176
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 {
2180 SV *old = PL_diehook;
2181 PL_diehook = 0;
2182 SvREFCNT_dec (old);
2183 croak ("\3async_pool terminate\2\n");
2184 }
2185
2186 av_clear (GvAV (PL_defgv));
2187 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189
2190 coro->prio = 0;
2191
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0);
2194
2195 av_push (av_async_pool, newSVsv (coro_current));
2196}
2197
2198#if 0
2199
2200void
2201_generator_call (...)
2202 PROTOTYPE: @
2203 PPCODE:
2204 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2205 xxxx
2206 abort ();
2207
1175SV * 2208SV *
1176_aio_get_state () 2209gensub (SV *sub, ...)
1177 CODE: 2210 PROTOTYPE: &;@
2211 CODE:
1178{ 2212{
1179 struct { 2213 struct coro *coro;
1180 int errorno; 2214 MAGIC *mg;
1181 int laststype; 2215 CV *xcv;
1182 int laststatval; 2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1183 Stat_t statcache; 2217 int i;
1184 } data;
1185 2218
1186 data.errorno = errno; 2219 CvGV (ncv) = CvGV (cv);
1187 data.laststype = PL_laststype; 2220 CvFILE (ncv) = CvFILE (cv);
1188 data.laststatval = PL_laststatval;
1189 data.statcache = PL_statcache;
1190 2221
1191 RETVAL = newSVpvn ((char *)&data, sizeof data); 2222 Newz (0, coro, 1, struct coro);
2223 coro->args = newAV ();
2224 coro->flags = CF_NEW;
2225
2226 av_extend (coro->args, items - 1);
2227 for (i = 1; i < items; i++)
2228 av_push (coro->args, newSVsv (ST (i)));
2229
2230 CvISXSUB_on (ncv);
2231 CvXSUBANY (ncv).any_ptr = (void *)coro;
2232
2233 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2234
2235 CvXSUB (ncv) = CvXSUB (xcv);
2236 CvANON_on (ncv);
2237
2238 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2239 RETVAL = newRV_noinc ((SV *)ncv);
1192} 2240}
1193 OUTPUT: 2241 OUTPUT:
1194 RETVAL 2242 RETVAL
1195 2243
2244#endif
2245
2246
2247MODULE = Coro::State PACKAGE = Coro::AIO
2248
2249SV *
2250_get_state ()
2251 CODE:
2252{
2253 struct io_state *data;
2254
2255 RETVAL = newSV (sizeof (struct io_state));
2256 data = (struct io_state *)SvPVX (RETVAL);
2257 SvCUR_set (RETVAL, sizeof (struct io_state));
2258 SvPOK_only (RETVAL);
2259
2260 data->errorno = errno;
2261 data->laststype = PL_laststype;
2262 data->laststatval = PL_laststatval;
2263 data->statcache = PL_statcache;
2264}
2265 OUTPUT:
2266 RETVAL
2267
1196void 2268void
1197_aio_set_state (char *data_) 2269_set_state (char *data_)
1198 PROTOTYPE: $ 2270 PROTOTYPE: $
1199 CODE: 2271 CODE:
1200{ 2272{
1201 struct { 2273 struct io_state *data = (void *)data_;
1202 int errorno;
1203 int laststype;
1204 int laststatval;
1205 Stat_t statcache;
1206 } *data = (void *)data_;
1207 2274
1208 errno = data->errorno; 2275 errno = data->errorno;
1209 PL_laststype = data->laststype; 2276 PL_laststype = data->laststype;
1210 PL_laststatval = data->laststatval; 2277 PL_laststatval = data->laststatval;
1211 PL_statcache = data->statcache; 2278 PL_statcache = data->statcache;
1212} 2279}
2280
2281
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent
2283
2284BOOT:
2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2286
2287SV *
2288_schedule (...)
2289 PROTOTYPE: @
2290 CODE:
2291{
2292 static int incede;
2293
2294 api_cede_notself ();
2295
2296 ++incede;
2297 while (coro_nready >= incede && api_cede ())
2298 ;
2299
2300 sv_setsv (sv_activity, &PL_sv_undef);
2301 if (coro_nready >= incede)
2302 {
2303 PUSHMARK (SP);
2304 PUTBACK;
2305 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2306 SPAGAIN;
2307 }
2308
2309 --incede;
2310}
2311
2312
2313MODULE = Coro::State PACKAGE = PerlIO::cede
2314
2315BOOT:
2316 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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