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Comparing Coro/Coro/State.xs (file contents):
Revision 1.105 by root, Mon Nov 27 02:01:33 2006 UTC vs.
Revision 1.249 by root, Tue Sep 30 17:12:35 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
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
9#if USE_VALGRIND 49#if CORO_USE_VALGRIND
10# include <valgrind/valgrind.h> 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)
11#endif 54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
12 58
13#define PERL_VERSION_ATLEAST(a,b,c) \ 59#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \ 60 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \ 61 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \ 62 && (PERL_VERSION > (b) \
… …
35# ifndef IS_PADCONST 81# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
37# endif 83# endif
38#endif 84#endif
39 85
40#include <stdio.h> 86/* 5.8.8 */
41#include <errno.h> 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
42 103
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD 105# undef CORO_STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
50
51#ifdef HAVE_MMAP
52# include <unistd.h>
53# include <sys/mman.h>
54# ifndef MAP_ANONYMOUS
55# ifdef MAP_ANON
56# define MAP_ANONYMOUS MAP_ANON
57# else
58# undef HAVE_MMAP
59# endif
60# endif 106#endif
61# include <limits.h> 107
62# ifndef PAGESIZE 108#ifndef CORO_STACKGUARD
63# define PAGESIZE pagesize 109# define CORO_STACKGUARD 0
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65static long pagesize;
66# else
67# define BOOT_PAGESIZE
68# endif 110#endif
69#endif
70 111
71/* The next macro should declare a variable stacklevel that contains and approximation 112/* prefer perl internal functions over our own? */
72 * to the current C stack pointer. Its property is that it changes with each call 113#ifndef CORO_PREFER_PERL_FUNCTIONS
73 * and should be unique. */ 114# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif
116
117/* The next macros try to return the current stack pointer, in an as
118 * portable way as possible. */
74#define dSTACKLEVEL int stacklevel 119#define dSTACKLEVEL volatile char stacklevel
75#define STACKLEVEL ((void *)&stacklevel) 120#define STACKLEVEL ((void *)&stacklevel)
76 121
77#define IN_DESTRUCT (PL_main_cv == Nullcv) 122#define IN_DESTRUCT (PL_main_cv == Nullcv)
78 123
79#if __GNUC__ >= 3 124#if __GNUC__ >= 3
80# define attribute(x) __attribute__(x) 125# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value))
81#else 128#else
82# define attribute(x) 129# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr)
83#endif 132#endif
133
134#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1)
84 136
85#define NOINLINE attribute ((noinline)) 137#define NOINLINE attribute ((noinline))
86 138
87#include "CoroAPI.h" 139#include "CoroAPI.h"
88
89#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90 140
91#ifdef USE_ITHREADS 141#ifdef USE_ITHREADS
92static perl_mutex coro_mutex; 142static perl_mutex coro_mutex;
93# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
94# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95#else 145#else
96# define LOCK (void)0 146# define LOCK (void)0
97# define UNLOCK (void)0 147# define UNLOCK (void)0
98#endif 148#endif
99 149
150/* helper storage struct for Coro::AIO */
151struct io_state
152{
153 AV *res;
154 int errorno;
155 I32 laststype;
156 int laststatval;
157 Stat_t statcache;
158};
159
160static double (*nvtime)(); /* so why doesn't it take void? */
161
162static size_t coro_stacksize = CORO_STACKSIZE;
100static struct CoroAPI coroapi; 163static struct CoroAPI coroapi;
101static AV *main_mainstack; /* used to differentiate between $main and others */ 164static AV *main_mainstack; /* used to differentiate between $main and others */
165static JMPENV *main_top_env;
102static HV *coro_state_stash, *coro_stash; 166static HV *coro_state_stash, *coro_stash;
103static SV *coro_mortal; /* will be freed after next transfer */ 167static volatile SV *coro_mortal; /* will be freed after next transfer */
168
169static GV *irsgv; /* $/ */
170static GV *stdoutgv; /* *STDOUT */
171static SV *rv_diehook;
172static SV *rv_warnhook;
173static HV *hv_sig; /* %SIG */
174
175/* async_pool helper stuff */
176static SV *sv_pool_rss;
177static SV *sv_pool_size;
178static AV *av_async_pool;
179
180/* Coro::AnyEvent */
181static SV *sv_activity;
182
183static struct coro_cctx *cctx_first;
184static int cctx_count, cctx_idle;
185
186enum {
187 CC_MAPPED = 0x01,
188 CC_NOREUSE = 0x02, /* throw this away after tracing */
189 CC_TRACE = 0x04,
190 CC_TRACE_SUB = 0x08, /* trace sub calls */
191 CC_TRACE_LINE = 0x10, /* trace each statement */
192 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
193};
104 194
105/* this is a structure representing a c-level coroutine */ 195/* this is a structure representing a c-level coroutine */
106typedef struct coro_stack { 196typedef struct coro_cctx {
107 struct coro_stack *next; 197 struct coro_cctx *next;
108 198
109 /* the stack */ 199 /* the stack */
110 void *sptr; 200 void *sptr;
111 long ssize; /* positive == mmap, otherwise malloc */ 201 size_t ssize;
112 202
113 /* cpu state */ 203 /* cpu state */
114 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 204 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
205 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
115 JMPENV *top_env; 206 JMPENV *top_env;
116 coro_context cctx; 207 coro_context cctx;
117 208
118#if USE_VALGRIND 209#if CORO_USE_VALGRIND
119 int valgrind_id; 210 int valgrind_id;
120#endif 211#endif
121} coro_stack; 212 unsigned char flags;
213} coro_cctx;
214
215enum {
216 CF_RUNNING = 0x0001, /* coroutine is running */
217 CF_READY = 0x0002, /* coroutine is ready */
218 CF_NEW = 0x0004, /* has never been switched to */
219 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
220};
221
222/* the structure where most of the perl state is stored, overlaid on the cxstack */
223typedef struct {
224 SV *defsv;
225 AV *defav;
226 SV *errsv;
227 SV *irsgv;
228#define VAR(name,type) type name;
229# include "state.h"
230#undef VAR
231} perl_slots;
232
233#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
122 234
123/* this is a structure representing a perl-level coroutine */ 235/* this is a structure representing a perl-level coroutine */
124struct coro { 236struct coro {
125 /* the c coroutine allocated to this perl coroutine, if any */ 237 /* the c coroutine allocated to this perl coroutine, if any */
126 coro_stack *stack; 238 coro_cctx *cctx;
127 239
128 /* data associated with this coroutine (initial args) */ 240 /* process data */
129 AV *args;
130 int refcnt;
131
132 /* optionally saved, might be zero */
133 AV *defav;
134 SV *defsv;
135 SV *errsv;
136
137 /* saved global state not related to stacks */
138 U8 dowarn;
139 I32 in_eval;
140
141 /* the stacks and related info (callchain etc..) */
142 PERL_SI *curstackinfo;
143 AV *curstack;
144 AV *mainstack; 241 AV *mainstack;
145 SV **stack_sp; 242 perl_slots *slot; /* basically the saved sp */
146 OP *op; 243
147 SV **curpad; 244 AV *args; /* data associated with this coroutine (initial args) */
148 AV *comppad; 245 int refcnt; /* coroutines are refcounted, yes */
149 CV *compcv; 246 int flags; /* CF_ flags */
150 SV **stack_base; 247 HV *hv; /* the perl hash associated with this coro, if any */
151 SV **stack_max; 248
152 SV **tmps_stack; 249 /* statistics */
153 I32 tmps_floor; 250 int usecount; /* number of transfers to this coro */
154 I32 tmps_ix;
155 I32 tmps_max;
156 I32 *markstack;
157 I32 *markstack_ptr;
158 I32 *markstack_max;
159 I32 *scopestack;
160 I32 scopestack_ix;
161 I32 scopestack_max;
162 ANY *savestack;
163 I32 savestack_ix;
164 I32 savestack_max;
165 OP **retstack;
166 I32 retstack_ix;
167 I32 retstack_max;
168 PMOP *curpm;
169 COP *curcop;
170 251
171 /* coro process data */ 252 /* coro process data */
172 int prio; 253 int prio;
254 SV *throw; /* exception to be thrown */
255
256 /* async_pool */
257 SV *saved_deffh;
258
259 /* linked list */
260 struct coro *next, *prev;
173}; 261};
174 262
175typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
176typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
177 265
266/** Coro ********************************************************************/
267
268#define PRIO_MAX 3
269#define PRIO_HIGH 1
270#define PRIO_NORMAL 0
271#define PRIO_LOW -1
272#define PRIO_IDLE -3
273#define PRIO_MIN -4
274
275/* for Coro.pm */
276static SV *coro_current;
277static SV *coro_readyhook;
278static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
279static int coro_nready;
280static struct coro *coro_first;
281
282/** lowlevel stuff **********************************************************/
283
284static SV *
285coro_get_sv (pTHX_ const char *name, int create)
286{
287#if PERL_VERSION_ATLEAST (5,10,0)
288 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
289 get_sv (name, create);
290#endif
291 return get_sv (name, create);
292}
293
178static AV * 294static AV *
295coro_get_av (pTHX_ const char *name, int create)
296{
297#if PERL_VERSION_ATLEAST (5,10,0)
298 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
299 get_av (name, create);
300#endif
301 return get_av (name, create);
302}
303
304static HV *
305coro_get_hv (pTHX_ const char *name, int create)
306{
307#if PERL_VERSION_ATLEAST (5,10,0)
308 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
309 get_hv (name, create);
310#endif
311 return get_hv (name, create);
312}
313
314static AV *
179coro_clone_padlist (CV *cv) 315coro_clone_padlist (pTHX_ CV *cv)
180{ 316{
181 AV *padlist = CvPADLIST (cv); 317 AV *padlist = CvPADLIST (cv);
182 AV *newpadlist, *newpad; 318 AV *newpadlist, *newpad;
183 319
184 newpadlist = newAV (); 320 newpadlist = newAV ();
185 AvREAL_off (newpadlist); 321 AvREAL_off (newpadlist);
186#if PERL_VERSION_ATLEAST (5,9,0) 322#if PERL_VERSION_ATLEAST (5,10,0)
187 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 323 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
188#else 324#else
189 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 325 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
190#endif 326#endif
191 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 327 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
192 --AvFILLp (padlist); 328 --AvFILLp (padlist);
193 329
194 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 330 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
195 av_store (newpadlist, 1, (SV *)newpad); 331 av_store (newpadlist, 1, (SV *)newpad);
196 332
197 return newpadlist; 333 return newpadlist;
198} 334}
199 335
200static void 336static void
201free_padlist (AV *padlist) 337free_padlist (pTHX_ AV *padlist)
202{ 338{
203 /* may be during global destruction */ 339 /* may be during global destruction */
204 if (SvREFCNT (padlist)) 340 if (SvREFCNT (padlist))
205 { 341 {
206 I32 i = AvFILLp (padlist); 342 I32 i = AvFILLp (padlist);
… …
227 AV *padlist; 363 AV *padlist;
228 AV *av = (AV *)mg->mg_obj; 364 AV *av = (AV *)mg->mg_obj;
229 365
230 /* casting is fun. */ 366 /* casting is fun. */
231 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 367 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
232 free_padlist (padlist); 368 free_padlist (aTHX_ padlist);
233 369
234 SvREFCNT_dec (av); 370 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
235 371
236 return 0; 372 return 0;
237} 373}
238 374
239#define PERL_MAGIC_coro PERL_MAGIC_ext 375#define CORO_MAGIC_type_cv PERL_MAGIC_ext
376#define CORO_MAGIC_type_state PERL_MAGIC_ext
240 377
241static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 378static MGVTBL coro_cv_vtbl = {
379 0, 0, 0, 0,
380 coro_cv_free
381};
382
383#define CORO_MAGIC(sv,type) \
384 SvMAGIC (sv) \
385 ? SvMAGIC (sv)->mg_type == type \
386 ? SvMAGIC (sv) \
387 : mg_find (sv, type) \
388 : 0
389
390#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
391#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
392
393static struct coro *
394SvSTATE_ (pTHX_ SV *coro)
395{
396 HV *stash;
397 MAGIC *mg;
398
399 if (SvROK (coro))
400 coro = SvRV (coro);
401
402 if (expect_false (SvTYPE (coro) != SVt_PVHV))
403 croak ("Coro::State object required");
404
405 stash = SvSTASH (coro);
406 if (expect_false (stash != coro_stash && stash != coro_state_stash))
407 {
408 /* very slow, but rare, check */
409 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
410 croak ("Coro::State object required");
411 }
412
413 mg = CORO_MAGIC_state (coro);
414 return (struct coro *)mg->mg_ptr;
415}
416
417#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
242 418
243/* the next two functions merely cache the padlists */ 419/* the next two functions merely cache the padlists */
244static void 420static void
245get_padlist (CV *cv) 421get_padlist (pTHX_ CV *cv)
246{ 422{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 423 MAGIC *mg = CORO_MAGIC_cv (cv);
424 AV *av;
248 425
249 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 426 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
250 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 427 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251 else 428 else
252 { 429 {
253#if 0 430#if CORO_PREFER_PERL_FUNCTIONS
254 /* this is probably cleaner, but also slower? */ 431 /* this is probably cleaner? but also slower! */
432 /* in practise, it seems to be less stable */
255 CV *cp = Perl_cv_clone (cv); 433 CV *cp = Perl_cv_clone (cv);
256 CvPADLIST (cv) = CvPADLIST (cp); 434 CvPADLIST (cv) = CvPADLIST (cp);
257 CvPADLIST (cp) = 0; 435 CvPADLIST (cp) = 0;
258 SvREFCNT_dec (cp); 436 SvREFCNT_dec (cp);
259#else 437#else
260 CvPADLIST (cv) = coro_clone_padlist (cv); 438 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
261#endif 439#endif
262 } 440 }
263} 441}
264 442
265static void 443static void
266put_padlist (CV *cv) 444put_padlist (pTHX_ CV *cv)
267{ 445{
268 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 446 MAGIC *mg = CORO_MAGIC_cv (cv);
447 AV *av;
269 448
270 if (!mg) 449 if (expect_false (!mg))
271 { 450 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
272 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274 mg->mg_virtual = &vtbl_coro;
275 mg->mg_obj = (SV *)newAV ();
276 }
277 451
278 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 452 av = (AV *)mg->mg_obj;
279}
280 453
281#define SB do { 454 if (expect_false (AvFILLp (av) >= AvMAX (av)))
282#define SE } while (0) 455 av_extend (av, AvMAX (av) + 1);
283 456
284#define LOAD(state) load_state((state)); 457 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285#define SAVE(state,flags) save_state((state),(flags)); 458}
286 459
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 460/** load & save, init *******************************************************/
288 461
289static void 462static void
290load_state(Coro__State c) 463load_perl (pTHX_ Coro__State c)
291{ 464{
292 PL_dowarn = c->dowarn; 465 perl_slots *slot = c->slot;
293 PL_in_eval = c->in_eval; 466 c->slot = 0;
294 467
295 PL_curstackinfo = c->curstackinfo;
296 PL_curstack = c->curstack;
297 PL_mainstack = c->mainstack; 468 PL_mainstack = c->mainstack;
298 PL_stack_sp = c->stack_sp;
299 PL_op = c->op;
300 PL_curpad = c->curpad;
301 PL_comppad = c->comppad;
302 PL_compcv = c->compcv;
303 PL_stack_base = c->stack_base;
304 PL_stack_max = c->stack_max;
305 PL_tmps_stack = c->tmps_stack;
306 PL_tmps_floor = c->tmps_floor;
307 PL_tmps_ix = c->tmps_ix;
308 PL_tmps_max = c->tmps_max;
309 PL_markstack = c->markstack;
310 PL_markstack_ptr = c->markstack_ptr;
311 PL_markstack_max = c->markstack_max;
312 PL_scopestack = c->scopestack;
313 PL_scopestack_ix = c->scopestack_ix;
314 PL_scopestack_max = c->scopestack_max;
315 PL_savestack = c->savestack;
316 PL_savestack_ix = c->savestack_ix;
317 PL_savestack_max = c->savestack_max;
318#if !PERL_VERSION_ATLEAST (5,9,0)
319 PL_retstack = c->retstack;
320 PL_retstack_ix = c->retstack_ix;
321 PL_retstack_max = c->retstack_max;
322#endif
323 PL_curpm = c->curpm;
324 PL_curcop = c->curcop;
325 469
326 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 470 GvSV (PL_defgv) = slot->defsv;
327 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 471 GvAV (PL_defgv) = slot->defav;
328 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 472 GvSV (PL_errgv) = slot->errsv;
473 GvSV (irsgv) = slot->irsgv;
474
475 #define VAR(name,type) PL_ ## name = slot->name;
476 # include "state.h"
477 #undef VAR
329 478
330 { 479 {
331 dSP; 480 dSP;
481
332 CV *cv; 482 CV *cv;
333 483
334 /* now do the ugly restore mess */ 484 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 485 while (expect_true (cv = (CV *)POPs))
336 { 486 {
337 AV *padlist = (AV *)POPs;
338
339 if (padlist)
340 {
341 put_padlist (cv); /* mark this padlist as available */ 487 put_padlist (aTHX_ cv); /* mark this padlist as available */
342 CvPADLIST(cv) = padlist; 488 CvDEPTH (cv) = PTR2IV (POPs);
343 } 489 CvPADLIST (cv) = (AV *)POPs;
344
345 ++CvDEPTH(cv);
346 } 490 }
347 491
348 PUTBACK; 492 PUTBACK;
349 } 493 }
350} 494}
351 495
352static void 496static void
353save_state(Coro__State c, int flags) 497save_perl (pTHX_ Coro__State c)
354{ 498{
355 { 499 {
356 dSP; 500 dSP;
357 I32 cxix = cxstack_ix; 501 I32 cxix = cxstack_ix;
358 PERL_CONTEXT *ccstk = cxstack; 502 PERL_CONTEXT *ccstk = cxstack;
… …
361 /* 505 /*
362 * the worst thing you can imagine happens first - we have to save 506 * the worst thing you can imagine happens first - we have to save
363 * (and reinitialize) all cv's in the whole callchain :( 507 * (and reinitialize) all cv's in the whole callchain :(
364 */ 508 */
365 509
366 PUSHs (Nullsv); 510 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 511 /* this loop was inspired by pp_caller */
368 for (;;) 512 for (;;)
369 { 513 {
370 while (cxix >= 0) 514 while (expect_true (cxix >= 0))
371 { 515 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 516 PERL_CONTEXT *cx = &ccstk[cxix--];
373 517
374 if (CxTYPE(cx) == CXt_SUB) 518 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375 { 519 {
376 CV *cv = cx->blk_sub.cv; 520 CV *cv = cx->blk_sub.cv;
521
377 if (CvDEPTH(cv)) 522 if (expect_true (CvDEPTH (cv)))
378 { 523 {
379 EXTEND (SP, CvDEPTH(cv)*2); 524 EXTEND (SP, 3);
380
381 while (--CvDEPTH(cv))
382 {
383 /* this tells the restore code to increment CvDEPTH */
384 PUSHs (Nullsv);
385 PUSHs ((SV *)cv);
386 }
387
388 PUSHs ((SV *)CvPADLIST(cv)); 525 PUSHs ((SV *)CvPADLIST (cv));
526 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 527 PUSHs ((SV *)cv);
390 528
529 CvDEPTH (cv) = 0;
391 get_padlist (cv); 530 get_padlist (aTHX_ cv);
392 } 531 }
393 } 532 }
394#ifdef CXt_FORMAT
395 else if (CxTYPE(cx) == CXt_FORMAT)
396 {
397 /* I never used formats, so how should I know how these are implemented? */
398 /* my bold guess is as a simple, plain sub... */
399 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400 }
401#endif
402 } 533 }
403 534
404 if (top_si->si_type == PERLSI_MAIN) 535 if (expect_true (top_si->si_type == PERLSI_MAIN))
405 break; 536 break;
406 537
407 top_si = top_si->si_prev; 538 top_si = top_si->si_prev;
408 ccstk = top_si->si_cxstack; 539 ccstk = top_si->si_cxstack;
409 cxix = top_si->si_cxix; 540 cxix = top_si->si_cxix;
410 } 541 }
411 542
412 PUTBACK; 543 PUTBACK;
413 } 544 }
414 545
415 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 546 /* allocate some space on the context stack for our purposes */
416 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 547 /* we manually unroll here, as usually 2 slots is enough */
417 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 548 if (SLOT_COUNT >= 1) CXINC;
549 if (SLOT_COUNT >= 2) CXINC;
550 if (SLOT_COUNT >= 3) CXINC;
551 {
552 int i;
553 for (i = 3; i < SLOT_COUNT; ++i)
554 CXINC;
555 }
556 cxstack_ix -= SLOT_COUNT; /* undo allocation */
418 557
419 c->dowarn = PL_dowarn;
420 c->in_eval = PL_in_eval;
421
422 c->curstackinfo = PL_curstackinfo;
423 c->curstack = PL_curstack;
424 c->mainstack = PL_mainstack; 558 c->mainstack = PL_mainstack;
425 c->stack_sp = PL_stack_sp; 559
426 c->op = PL_op; 560 {
427 c->curpad = PL_curpad; 561 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428 c->comppad = PL_comppad; 562
429 c->compcv = PL_compcv; 563 slot->defav = GvAV (PL_defgv);
430 c->stack_base = PL_stack_base; 564 slot->defsv = DEFSV;
431 c->stack_max = PL_stack_max; 565 slot->errsv = ERRSV;
432 c->tmps_stack = PL_tmps_stack; 566 slot->irsgv = GvSV (irsgv);
433 c->tmps_floor = PL_tmps_floor; 567
434 c->tmps_ix = PL_tmps_ix; 568 #define VAR(name,type) slot->name = PL_ ## name;
435 c->tmps_max = PL_tmps_max; 569 # include "state.h"
436 c->markstack = PL_markstack; 570 #undef VAR
437 c->markstack_ptr = PL_markstack_ptr; 571 }
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445#if !PERL_VERSION_ATLEAST (5,9,0)
446 c->retstack = PL_retstack;
447 c->retstack_ix = PL_retstack_ix;
448 c->retstack_max = PL_retstack_max;
449#endif
450 c->curpm = PL_curpm;
451 c->curcop = PL_curcop;
452} 572}
453 573
454/* 574/*
455 * allocate various perl stacks. This is an exact copy 575 * allocate various perl stacks. This is an exact copy
456 * of perl.c:init_stacks, except that it uses less memory 576 * of perl.c:init_stacks, except that it uses less memory
457 * on the (sometimes correct) assumption that coroutines do 577 * on the (sometimes correct) assumption that coroutines do
458 * not usually need a lot of stackspace. 578 * not usually need a lot of stackspace.
459 */ 579 */
580#if CORO_PREFER_PERL_FUNCTIONS
581# define coro_init_stacks init_stacks
582#else
460static void 583static void
461coro_init_stacks () 584coro_init_stacks (pTHX)
462{ 585{
463 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 586 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 587 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 588 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 589 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 590
468 PL_stack_base = AvARRAY(PL_curstack); 591 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 592 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 593 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 594
472 New(50,PL_tmps_stack,96,SV*); 595 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 596 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 597 PL_tmps_ix = -1;
475 PL_tmps_max = 96; 598 PL_tmps_max = 32;
476 599
477 New(54,PL_markstack,16,I32); 600 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 601 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 602 PL_markstack_max = PL_markstack + 16;
480 603
481#ifdef SET_MARK_OFFSET 604#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 605 SET_MARK_OFFSET;
483#endif 606#endif
484 607
485 New(54,PL_scopestack,16,I32); 608 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 609 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 610 PL_scopestack_max = 8;
488 611
489 New(54,PL_savestack,96,ANY); 612 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 613 PL_savestack_ix = 0;
491 PL_savestack_max = 96; 614 PL_savestack_max = 24;
492 615
493#if !PERL_VERSION_ATLEAST (5,9,0) 616#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,8,OP*); 617 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 618 PL_retstack_ix = 0;
496 PL_retstack_max = 8; 619 PL_retstack_max = 4;
497#endif 620#endif
498} 621}
622#endif
499 623
500/* 624/*
501 * destroy the stacks, the callchain etc... 625 * destroy the stacks, the callchain etc...
502 */ 626 */
503static void 627static void
504coro_destroy_stacks() 628coro_destroy_stacks (pTHX)
505{ 629{
506 if (!IN_DESTRUCT)
507 {
508 /* is this ugly, I ask? */
509 LEAVE_SCOPE (0);
510
511 /* sure it is, but more important: is it correct?? :/ */
512 FREETMPS;
513
514 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
515 }
516
517 while (PL_curstackinfo->si_next) 630 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 631 PL_curstackinfo = PL_curstackinfo->si_next;
519 632
520 while (PL_curstackinfo) 633 while (PL_curstackinfo)
521 { 634 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 635 PERL_SI *p = PL_curstackinfo->si_prev;
523 636
524 { /*D*//*remove*/
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 if (!IN_DESTRUCT) 637 if (!IN_DESTRUCT)
531 {
532 dounwind (-1);/*D*//*remove*/
533 SvREFCNT_dec (PL_curstackinfo->si_stack); 638 SvREFCNT_dec (PL_curstackinfo->si_stack);
534 }
535 639
536 Safefree (PL_curstackinfo->si_cxstack); 640 Safefree (PL_curstackinfo->si_cxstack);
537 Safefree (PL_curstackinfo); 641 Safefree (PL_curstackinfo);
538 PL_curstackinfo = p; 642 PL_curstackinfo = p;
539 } 643 }
540 644
541 Safefree (PL_tmps_stack); 645 Safefree (PL_tmps_stack);
542 Safefree (PL_markstack); 646 Safefree (PL_markstack);
543 Safefree (PL_scopestack); 647 Safefree (PL_scopestack);
544 Safefree (PL_savestack); 648 Safefree (PL_savestack);
545#if !PERL_VERSION_ATLEAST (5,9,0) 649#if !PERL_VERSION_ATLEAST (5,10,0)
546 Safefree (PL_retstack); 650 Safefree (PL_retstack);
547#endif 651#endif
548} 652}
549 653
654static size_t
655coro_rss (pTHX_ struct coro *coro)
656{
657 size_t rss = sizeof (*coro);
658
659 if (coro->mainstack)
660 {
661 perl_slots tmp_slot;
662 perl_slots *slot;
663
664 if (coro->flags & CF_RUNNING)
665 {
666 slot = &tmp_slot;
667
668 #define VAR(name,type) slot->name = PL_ ## name;
669 # include "state.h"
670 #undef VAR
671 }
672 else
673 slot = coro->slot;
674
675 if (slot)
676 {
677 rss += sizeof (slot->curstackinfo);
678 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
679 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
680 rss += slot->tmps_max * sizeof (SV *);
681 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
682 rss += slot->scopestack_max * sizeof (I32);
683 rss += slot->savestack_max * sizeof (ANY);
684
685#if !PERL_VERSION_ATLEAST (5,10,0)
686 rss += slot->retstack_max * sizeof (OP *);
687#endif
688 }
689 }
690
691 return rss;
692}
693
694/** coroutine stack handling ************************************************/
695
696static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
697static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
698static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
699
700/* apparently < 5.8.8 */
701#ifndef MgPV_nolen_const
702#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
703 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
704 (const char*)(mg)->mg_ptr)
705#endif
706
707/*
708 * This overrides the default magic get method of %SIG elements.
709 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
710 * and instead of tryign to save and restore the hash elements, we just provide
711 * readback here.
712 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
713 * not expecting this to actually change the hook. This is a potential problem
714 * when a schedule happens then, but we ignore this.
715 */
716static int
717coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
718{
719 const char *s = MgPV_nolen_const (mg);
720
721 if (*s == '_')
722 {
723 SV **svp = 0;
724
725 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
726 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
727
728 if (svp)
729 {
730 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
731 return 0;
732 }
733 }
734
735 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
736}
737
738static int
739coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
740{
741 const char *s = MgPV_nolen_const (mg);
742
743 if (*s == '_')
744 {
745 SV **svp = 0;
746
747 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
748 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
749
750 if (svp)
751 {
752 SV *old = *svp;
753 *svp = 0;
754 SvREFCNT_dec (old);
755 return 0;
756 }
757 }
758
759 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
760}
761
762static int
763coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
764{
765 const char *s = MgPV_nolen_const (mg);
766
767 if (*s == '_')
768 {
769 SV **svp = 0;
770
771 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
772 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
773
774 if (svp)
775 {
776 SV *old = *svp;
777 *svp = newSVsv (sv);
778 SvREFCNT_dec (old);
779 return 0;
780 }
781 }
782
783 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
784}
785
550static void 786static void
551setup_coro (struct coro *coro) 787coro_setup (pTHX_ struct coro *coro)
552{ 788{
553 /* 789 /*
554 * emulate part of the perl startup here. 790 * emulate part of the perl startup here.
555 */ 791 */
556
557 coro_init_stacks (); 792 coro_init_stacks (aTHX);
558 793
794 PL_runops = RUNOPS_DEFAULT;
795 PL_curcop = &PL_compiling;
796 PL_in_eval = EVAL_NULL;
559 PL_curcop = 0; 797 PL_comppad = 0;
560 PL_in_eval = 0;
561 PL_curpm = 0; 798 PL_curpm = 0;
799 PL_curpad = 0;
800 PL_localizing = 0;
801 PL_dirty = 0;
802 PL_restartop = 0;
803#if PERL_VERSION_ATLEAST (5,10,0)
804 PL_parser = 0;
805#endif
806
807 /* recreate the die/warn hooks */
808 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
809 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
810
811 GvSV (PL_defgv) = newSV (0);
812 GvAV (PL_defgv) = coro->args; coro->args = 0;
813 GvSV (PL_errgv) = newSV (0);
814 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
815 PL_rs = newSVsv (GvSV (irsgv));
816 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
562 817
563 { 818 {
564 dSP; 819 dSP;
565 LOGOP myop; 820 LOGOP myop;
566 821
567 /* I have no idea why this is needed, but it is */
568 PUSHMARK (SP);
569
570 SvREFCNT_dec (GvAV (PL_defgv));
571 GvAV (PL_defgv) = coro->args; coro->args = 0;
572
573 Zero (&myop, 1, LOGOP); 822 Zero (&myop, 1, LOGOP);
574 myop.op_next = Nullop; 823 myop.op_next = Nullop;
575 myop.op_flags = OPf_WANT_VOID; 824 myop.op_flags = OPf_WANT_VOID;
576 825
826 PUSHMARK (SP);
827 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
828 PUTBACK;
577 PL_op = (OP *)&myop; 829 PL_op = (OP *)&myop;
578
579 PUSHMARK (SP);
580 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581 PUTBACK;
582 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 830 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583 SPAGAIN; 831 SPAGAIN;
584
585 ENTER; /* necessary e.g. for dounwind */
586 } 832 }
833
834 /* this newly created coroutine might be run on an existing cctx which most
835 * likely was suspended in set_stacklevel, called from entersub.
836 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
837 * so we ENTER here for symmetry
838 */
839 ENTER;
587} 840}
588 841
589static void 842static void
843coro_destroy (pTHX_ struct coro *coro)
844{
845 if (!IN_DESTRUCT)
846 {
847 /* restore all saved variables and stuff */
848 LEAVE_SCOPE (0);
849 assert (PL_tmps_floor == -1);
850
851 /* free all temporaries */
852 FREETMPS;
853 assert (PL_tmps_ix == -1);
854
855 /* unwind all extra stacks */
856 POPSTACK_TO (PL_mainstack);
857
858 /* unwind main stack */
859 dounwind (-1);
860 }
861
862 SvREFCNT_dec (GvSV (PL_defgv));
863 SvREFCNT_dec (GvAV (PL_defgv));
864 SvREFCNT_dec (GvSV (PL_errgv));
865 SvREFCNT_dec (PL_defoutgv);
866 SvREFCNT_dec (PL_rs);
867 SvREFCNT_dec (GvSV (irsgv));
868
869 SvREFCNT_dec (PL_diehook);
870 SvREFCNT_dec (PL_warnhook);
871
872 SvREFCNT_dec (coro->saved_deffh);
873 SvREFCNT_dec (coro->throw);
874
875 coro_destroy_stacks (aTHX);
876}
877
878static void
590free_coro_mortal () 879free_coro_mortal (pTHX)
591{ 880{
592 if (coro_mortal) 881 if (expect_true (coro_mortal))
593 { 882 {
594 SvREFCNT_dec (coro_mortal); 883 SvREFCNT_dec (coro_mortal);
595 coro_mortal = 0; 884 coro_mortal = 0;
596 } 885 }
597} 886}
598 887
888static int
889runops_trace (pTHX)
890{
891 COP *oldcop = 0;
892 int oldcxix = -2;
893 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
894 coro_cctx *cctx = coro->cctx;
895
896 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
897 {
898 PERL_ASYNC_CHECK ();
899
900 if (cctx->flags & CC_TRACE_ALL)
901 {
902 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
903 {
904 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
905 SV **bot, **top;
906 AV *av = newAV (); /* return values */
907 SV **cb;
908 dSP;
909
910 GV *gv = CvGV (cx->blk_sub.cv);
911 SV *fullname = sv_2mortal (newSV (0));
912 if (isGV (gv))
913 gv_efullname3 (fullname, gv, 0);
914
915 bot = PL_stack_base + cx->blk_oldsp + 1;
916 top = cx->blk_gimme == G_ARRAY ? SP + 1
917 : cx->blk_gimme == G_SCALAR ? bot + 1
918 : bot;
919
920 av_extend (av, top - bot);
921 while (bot < top)
922 av_push (av, SvREFCNT_inc_NN (*bot++));
923
924 PL_runops = RUNOPS_DEFAULT;
925 ENTER;
926 SAVETMPS;
927 EXTEND (SP, 3);
928 PUSHMARK (SP);
929 PUSHs (&PL_sv_no);
930 PUSHs (fullname);
931 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
932 PUTBACK;
933 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
934 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
935 SPAGAIN;
936 FREETMPS;
937 LEAVE;
938 PL_runops = runops_trace;
939 }
940
941 if (oldcop != PL_curcop)
942 {
943 oldcop = PL_curcop;
944
945 if (PL_curcop != &PL_compiling)
946 {
947 SV **cb;
948
949 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
950 {
951 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
952
953 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
954 {
955 runops_proc_t old_runops = PL_runops;
956 dSP;
957 GV *gv = CvGV (cx->blk_sub.cv);
958 SV *fullname = sv_2mortal (newSV (0));
959
960 if (isGV (gv))
961 gv_efullname3 (fullname, gv, 0);
962
963 PL_runops = RUNOPS_DEFAULT;
964 ENTER;
965 SAVETMPS;
966 EXTEND (SP, 3);
967 PUSHMARK (SP);
968 PUSHs (&PL_sv_yes);
969 PUSHs (fullname);
970 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
971 PUTBACK;
972 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
973 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
974 SPAGAIN;
975 FREETMPS;
976 LEAVE;
977 PL_runops = runops_trace;
978 }
979
980 oldcxix = cxstack_ix;
981 }
982
983 if (cctx->flags & CC_TRACE_LINE)
984 {
985 dSP;
986
987 PL_runops = RUNOPS_DEFAULT;
988 ENTER;
989 SAVETMPS;
990 EXTEND (SP, 3);
991 PL_runops = RUNOPS_DEFAULT;
992 PUSHMARK (SP);
993 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
994 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
995 PUTBACK;
996 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
997 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
998 SPAGAIN;
999 FREETMPS;
1000 LEAVE;
1001 PL_runops = runops_trace;
1002 }
1003 }
1004 }
1005 }
1006 }
1007
1008 TAINT_NOT;
1009 return 0;
1010}
1011
1012/* inject a fake call to Coro::State::_cctx_init into the execution */
1013/* _cctx_init should be careful, as it could be called at almost any time */
1014/* during execution of a perl program */
599static void NOINLINE 1015static void NOINLINE
600prepare_cctx (coro_stack *cctx) 1016cctx_prepare (pTHX_ coro_cctx *cctx)
601{ 1017{
602 dSP; 1018 dSP;
603 LOGOP myop; 1019 LOGOP myop;
604 1020
1021 PL_top_env = &PL_start_env;
1022
1023 if (cctx->flags & CC_TRACE)
1024 PL_runops = runops_trace;
1025
605 Zero (&myop, 1, LOGOP); 1026 Zero (&myop, 1, LOGOP);
606 myop.op_next = PL_op; 1027 myop.op_next = PL_op;
607 myop.op_flags = OPf_WANT_VOID; 1028 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608
609 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610 1029
611 PUSHMARK (SP); 1030 PUSHMARK (SP);
1031 EXTEND (SP, 2);
1032 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
612 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 1033 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
613 PUTBACK; 1034 PUTBACK;
1035 PL_op = (OP *)&myop;
614 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1036 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN; 1037 SPAGAIN;
616} 1038}
617 1039
1040/*
1041 * this is a _very_ stripped down perl interpreter ;)
1042 */
618static void 1043static void
619coro_run (void *arg) 1044cctx_run (void *arg)
620{ 1045{
1046 dTHX;
1047
621 /* coro_run is the alternative epilogue of transfer() */ 1048 /* cctx_run is the alternative tail of transfer(), so unlock here. */
622 UNLOCK; 1049 UNLOCK;
623 1050
1051 /* we now skip the entersub that lead to transfer() */
1052 PL_op = PL_op->op_next;
1053
1054 /* inject a fake subroutine call to cctx_init */
1055 cctx_prepare (aTHX_ (coro_cctx *)arg);
1056
1057 /* somebody or something will hit me for both perl_run and PL_restartop */
1058 PL_restartop = PL_op;
1059 perl_run (PL_curinterp);
1060
624 /* 1061 /*
625 * this is a _very_ stripped down perl interpreter ;) 1062 * If perl-run returns we assume exit() was being called or the coro
1063 * fell off the end, which seems to be the only valid (non-bug)
1064 * reason for perl_run to return. We try to exit by jumping to the
1065 * bootstrap-time "top" top_env, as we cannot restore the "main"
1066 * coroutine as Coro has no such concept
626 */ 1067 */
627 PL_top_env = &PL_start_env; 1068 PL_top_env = main_top_env;
628 /* inject call to cctx_init */ 1069 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
629 prepare_cctx ((coro_stack *)arg);
630
631 /* somebody will hit me for both perl_run and PL_restartop */
632 perl_run (PL_curinterp);
633
634 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
635 abort ();
636} 1070}
637 1071
638static coro_stack * 1072static coro_cctx *
639stack_new () 1073cctx_new ()
640{ 1074{
641 coro_stack *stack; 1075 coro_cctx *cctx;
1076 void *stack_start;
1077 size_t stack_size;
642 1078
1079 ++cctx_count;
1080
643 New (0, stack, 1, coro_stack); 1081 Newz (0, cctx, 1, coro_cctx);
644 1082
645#if HAVE_MMAP 1083#if HAVE_MMAP
646
647 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1084 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
648 /* mmap suppsedly does allocate-on-write for us */ 1085 /* mmap supposedly does allocate-on-write for us */
649 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1086 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650 1087
651 if (stack->sptr == (void *)-1) 1088 if (cctx->sptr != (void *)-1)
652 {
653 perror ("FATAL: unable to mmap stack for coroutine");
654 _exit (EXIT_FAILURE);
655 } 1089 {
656
657# if STACKGUARD 1090# if CORO_STACKGUARD
658 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1091 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
659# endif 1092# endif
660 1093 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
661#else 1094 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
662 1095 cctx->flags |= CC_MAPPED;
663 stack->ssize = STACKSIZE * (long)sizeof (long);
664 New (0, stack->sptr, STACKSIZE, long);
665
666 if (!stack->sptr)
667 { 1096 }
1097 else
1098#endif
1099 {
1100 cctx->ssize = coro_stacksize * (long)sizeof (long);
1101 New (0, cctx->sptr, coro_stacksize, long);
1102
1103 if (!cctx->sptr)
1104 {
668 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1105 perror ("FATAL: unable to allocate stack for coroutine");
669 _exit (EXIT_FAILURE); 1106 _exit (EXIT_FAILURE);
670 } 1107 }
671 1108
672#endif 1109 stack_start = cctx->sptr;
1110 stack_size = cctx->ssize;
1111 }
673 1112
674#if USE_VALGRIND 1113 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
675 stack->valgrind_id = VALGRIND_STACK_REGISTER ( 1114 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
676 STACKGUARD * PAGESIZE + (char *)stack->sptr,
677 stack->ssize + (char *)stack->sptr
678 );
679#endif
680 1115
681 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683 return stack; 1116 return cctx;
684} 1117}
685 1118
686static void 1119static void
687stack_free (coro_stack *stack) 1120cctx_destroy (coro_cctx *cctx)
688{ 1121{
689 if (!stack) 1122 if (!cctx)
690 return; 1123 return;
691 1124
1125 --cctx_count;
1126
692#if USE_VALGRIND 1127#if CORO_USE_VALGRIND
693 VALGRIND_STACK_DEREGISTER (stack->valgrind_id); 1128 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694#endif 1129#endif
695 1130
696#if HAVE_MMAP 1131#if HAVE_MMAP
1132 if (cctx->flags & CC_MAPPED)
697 munmap (stack->sptr, stack->ssize); 1133 munmap (cctx->sptr, cctx->ssize);
698#else 1134 else
1135#endif
699 Safefree (stack->sptr); 1136 Safefree (cctx->sptr);
700#endif
701 1137
702 Safefree (stack); 1138 Safefree (cctx);
703} 1139}
704 1140
705static coro_stack *stack_first; 1141/* wether this cctx should be destructed */
706static int cctx_count, cctx_idle; 1142#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
707 1143
708static coro_stack * 1144static coro_cctx *
709stack_get () 1145cctx_get (pTHX)
710{ 1146{
711 coro_stack *stack; 1147 while (expect_true (cctx_first))
712
713 if (stack_first)
714 { 1148 {
1149 coro_cctx *cctx = cctx_first;
1150 cctx_first = cctx->next;
715 --cctx_idle; 1151 --cctx_idle;
716 stack = stack_first; 1152
717 stack_first = stack->next; 1153 if (expect_true (!CCTX_EXPIRED (cctx)))
718 } 1154 return cctx;
719 else 1155
720 { 1156 cctx_destroy (cctx);
721 ++cctx_count;
722 stack = stack_new ();
723 PL_op = PL_op->op_next;
724 } 1157 }
725 1158
726 return stack; 1159 return cctx_new ();
727} 1160}
728 1161
729static void 1162static void
730stack_put (coro_stack *stack) 1163cctx_put (coro_cctx *cctx)
731{ 1164{
1165 /* free another cctx if overlimit */
1166 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1167 {
1168 coro_cctx *first = cctx_first;
1169 cctx_first = first->next;
1170 --cctx_idle;
1171
1172 cctx_destroy (first);
1173 }
1174
732 ++cctx_idle; 1175 ++cctx_idle;
733 stack->next = stack_first; 1176 cctx->next = cctx_first;
734 stack_first = stack; 1177 cctx_first = cctx;
735} 1178}
736 1179
737/* never call directly, always through the coro_state_transfer global variable */ 1180/** coroutine switching *****************************************************/
1181
1182static void
1183transfer_check (pTHX_ struct coro *prev, struct coro *next)
1184{
1185 if (expect_true (prev != next))
1186 {
1187 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1188 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1189
1190 if (expect_false (next->flags & CF_RUNNING))
1191 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1192
1193 if (expect_false (next->flags & CF_DESTROYED))
1194 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1195
1196#if !PERL_VERSION_ATLEAST (5,10,0)
1197 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1198 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1199#endif
1200 }
1201}
1202
1203/* always use the TRANSFER macro */
738static void NOINLINE 1204static void NOINLINE
739transfer (struct coro *prev, struct coro *next, int flags) 1205transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
740{ 1206{
741 dSTACKLEVEL; 1207 dSTACKLEVEL;
1208 static volatile int has_throw;
742 1209
743 /* sometimes transfer is only called to set idle_sp */ 1210 /* sometimes transfer is only called to set idle_sp */
744 if (flags == TRANSFER_SET_STACKLEVEL) 1211 if (expect_false (!next))
1212 {
745 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1213 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746 else if (prev != next) 1214 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 { 1215 }
1216 else if (expect_true (prev != next))
1217 {
748 coro_stack *prev__stack; 1218 coro_cctx *prev__cctx;
1219
1220 if (expect_false (prev->flags & CF_NEW))
1221 {
1222 /* create a new empty context */
1223 Newz (0, prev->cctx, 1, coro_cctx);
1224 prev->flags &= ~CF_NEW;
1225 prev->flags |= CF_RUNNING;
1226 }
1227
1228 prev->flags &= ~CF_RUNNING;
1229 next->flags |= CF_RUNNING;
749 1230
750 LOCK; 1231 LOCK;
751 1232
752 if (next->mainstack) 1233 /* first get rid of the old state */
1234 save_perl (aTHX_ prev);
1235
1236 if (expect_false (next->flags & CF_NEW))
753 { 1237 {
754 /* coroutine already started */ 1238 /* need to start coroutine */
755 SAVE (prev, flags); 1239 next->flags &= ~CF_NEW;
756 LOAD (next); 1240 /* setup coroutine call */
1241 coro_setup (aTHX_ next);
757 } 1242 }
758 else 1243 else
1244 load_perl (aTHX_ next);
1245
1246 prev__cctx = prev->cctx;
1247
1248 /* possibly "free" the cctx */
1249 if (expect_true (
1250 prev__cctx->idle_sp == STACKLEVEL
1251 && !(prev__cctx->flags & CC_TRACE)
1252 && !force_cctx
1253 ))
759 { 1254 {
760 /* need to start coroutine */ 1255 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
761 /* first get rid of the old state */ 1256 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
762 SAVE (prev, -1); 1257
763 /* setup coroutine call */ 1258 prev->cctx = 0;
764 setup_coro (next); 1259
765 /* need a stack */ 1260 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
766 next->stack = 0; 1261 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1262 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1263 if (!next->cctx)
1264 next->cctx = cctx_get (aTHX);
1265
1266 cctx_put (prev__cctx);
767 } 1267 }
768 1268
769 if (!prev->stack) 1269 ++next->usecount;
770 /* create a new empty context */
771 Newz (0, prev->stack, 1, coro_stack);
772 1270
773 prev__stack = prev->stack; 1271 if (expect_true (!next->cctx))
1272 next->cctx = cctx_get (aTHX);
774 1273
775 /* possibly "free" the stack */ 1274 has_throw = !!next->throw;
776 if (prev__stack->idle_sp == STACKLEVEL) 1275
1276 if (expect_false (prev__cctx != next->cctx))
777 { 1277 {
778 stack_put (prev__stack); 1278 prev__cctx->top_env = PL_top_env;
779 prev->stack = 0; 1279 PL_top_env = next->cctx->top_env;
1280 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
780 } 1281 }
781 1282
782 if (!next->stack) 1283 free_coro_mortal (aTHX);
783 next->stack = stack_get (); 1284 UNLOCK;
784 1285
785 if (prev__stack != next->stack) 1286 if (expect_false (has_throw))
786 { 1287 {
787 prev__stack->top_env = PL_top_env; 1288 struct coro *coro = SvSTATE (coro_current);
788 PL_top_env = next->stack->top_env; 1289
789 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1290 if (coro->throw)
1291 {
1292 SV *exception = coro->throw;
1293 coro->throw = 0;
1294 sv_setsv (ERRSV, exception);
1295 croak (0);
1296 }
790 } 1297 }
1298 }
1299}
791 1300
792 free_coro_mortal (); 1301struct transfer_args
1302{
1303 struct coro *prev, *next;
1304};
793 1305
1306#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1307#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1308
1309/** high level stuff ********************************************************/
1310
1311static int
1312coro_state_destroy (pTHX_ struct coro *coro)
1313{
1314 if (coro->flags & CF_DESTROYED)
1315 return 0;
1316
1317 coro->flags |= CF_DESTROYED;
1318
1319 if (coro->flags & CF_READY)
1320 {
1321 /* reduce nready, as destroying a ready coro effectively unreadies it */
1322 /* alternative: look through all ready queues and remove the coro */
1323 LOCK;
1324 --coro_nready;
794 UNLOCK; 1325 UNLOCK;
795 } 1326 }
796} 1327 else
797 1328 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
798struct transfer_args
799{
800 struct coro *prev, *next;
801 int flags;
802};
803
804#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
805
806static void
807coro_state_destroy (struct coro *coro)
808{
809 if (coro->refcnt--)
810 return;
811 1329
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1330 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1331 {
814 struct coro temp; 1332 struct coro temp;
815 1333
816 SAVE ((&temp), TRANSFER_SAVE_ALL); 1334 if (coro->flags & CF_RUNNING)
817 LOAD (coro); 1335 croak ("FATAL: tried to destroy currently running coroutine");
818 1336
819 coro_destroy_stacks (); 1337 save_perl (aTHX_ &temp);
1338 load_perl (aTHX_ coro);
820 1339
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1340 coro_destroy (aTHX_ coro);
822 1341
1342 load_perl (aTHX_ &temp);
1343
823 coro->mainstack = 0; 1344 coro->slot = 0;
824 } 1345 }
825 1346
826 stack_free (coro->stack); 1347 cctx_destroy (coro->cctx);
827 SvREFCNT_dec (coro->args); 1348 SvREFCNT_dec (coro->args);
828 Safefree (coro); 1349
1350 if (coro->next) coro->next->prev = coro->prev;
1351 if (coro->prev) coro->prev->next = coro->next;
1352 if (coro == coro_first) coro_first = coro->next;
1353
1354 return 1;
829} 1355}
830 1356
831static int 1357static int
832coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1358coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1359{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1360 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1361 mg->mg_ptr = 0;
836 1362
1363 coro->hv = 0;
1364
1365 if (--coro->refcnt < 0)
1366 {
837 coro_state_destroy (coro); 1367 coro_state_destroy (aTHX_ coro);
1368 Safefree (coro);
1369 }
838 1370
839 return 0; 1371 return 0;
840} 1372}
841 1373
842static int 1374static int
… …
849 return 0; 1381 return 0;
850} 1382}
851 1383
852static MGVTBL coro_state_vtbl = { 1384static MGVTBL coro_state_vtbl = {
853 0, 0, 0, 0, 1385 0, 0, 0, 0,
854 coro_state_clear, 1386 coro_state_free,
855 0, 1387 0,
856#ifdef MGf_DUP 1388#ifdef MGf_DUP
857 coro_state_dup, 1389 coro_state_dup,
858#else 1390#else
859# define MGf_DUP 0 1391# define MGf_DUP 0
860#endif 1392#endif
861}; 1393};
862 1394
863static struct coro *
864SvSTATE (SV *coro)
865{
866 HV *stash;
867 MAGIC *mg;
868
869 if (SvROK (coro))
870 coro = SvRV (coro);
871
872 stash = SvSTASH (coro);
873 if (stash != coro_stash && stash != coro_state_stash)
874 {
875 /* very slow, but rare, check */
876 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
877 croak ("Coro::State object required");
878 }
879
880 mg = SvMAGIC (coro);
881 assert (mg->mg_type == PERL_MAGIC_ext);
882 return (struct coro *)mg->mg_ptr;
883}
884
885static void 1395static void
886prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1396prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
887{ 1397{
888 ta->prev = SvSTATE (prev); 1398 ta->prev = SvSTATE (prev_sv);
889 ta->next = SvSTATE (next); 1399 ta->next = SvSTATE (next_sv);
890 ta->flags = flags; 1400 TRANSFER_CHECK (*ta);
891} 1401}
892 1402
893static void 1403static void
894api_transfer (SV *prev, SV *next, int flags) 1404api_transfer (SV *prev_sv, SV *next_sv)
895{ 1405{
896 dTHX; 1406 dTHX;
897 struct transfer_args ta; 1407 struct transfer_args ta;
898 1408
899 prepare_transfer (&ta, prev, next, flags); 1409 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900 TRANSFER (ta); 1410 TRANSFER (ta, 1);
901} 1411}
902 1412
903/** Coro ********************************************************************/ 1413/** Coro ********************************************************************/
904 1414
905#define PRIO_MAX 3
906#define PRIO_HIGH 1
907#define PRIO_NORMAL 0
908#define PRIO_LOW -1
909#define PRIO_IDLE -3
910#define PRIO_MIN -4
911
912/* for Coro.pm */
913static GV *coro_current, *coro_idle;
914static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915static int coro_nready;
916
917static void 1415static void
918coro_enq (SV *sv) 1416coro_enq (pTHX_ SV *coro_sv)
1417{
1418 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1419}
1420
1421static SV *
1422coro_deq (pTHX)
919{ 1423{
920 int prio; 1424 int prio;
921 1425
922 if (SvTYPE (sv) != SVt_PVHV)
923 croak ("Coro::ready tried to enqueue something that is not a coroutine");
924
925 prio = SvSTATE (sv)->prio;
926
927 av_push (coro_ready [prio - PRIO_MIN], sv);
928 coro_nready++;
929}
930
931static SV *
932coro_deq (int min_prio)
933{
934 int prio = PRIO_MAX - PRIO_MIN;
935
936 min_prio -= PRIO_MIN;
937 if (min_prio < 0)
938 min_prio = 0;
939
940 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1426 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
941 if (AvFILLp (coro_ready [prio]) >= 0) 1427 if (AvFILLp (coro_ready [prio]) >= 0)
942 {
943 coro_nready--;
944 return av_shift (coro_ready [prio]); 1428 return av_shift (coro_ready [prio]);
945 }
946 1429
947 return 0; 1430 return 0;
948} 1431}
949 1432
1433static int
1434api_ready (SV *coro_sv)
1435{
1436 dTHX;
1437 struct coro *coro;
1438 SV *sv_hook;
1439 void (*xs_hook)(void);
1440
1441 if (SvROK (coro_sv))
1442 coro_sv = SvRV (coro_sv);
1443
1444 coro = SvSTATE (coro_sv);
1445
1446 if (coro->flags & CF_READY)
1447 return 0;
1448
1449 coro->flags |= CF_READY;
1450
1451 LOCK;
1452
1453 sv_hook = coro_nready ? 0 : coro_readyhook;
1454 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1455
1456 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1457 ++coro_nready;
1458
1459 UNLOCK;
1460
1461 if (sv_hook)
1462 {
1463 dSP;
1464
1465 ENTER;
1466 SAVETMPS;
1467
1468 PUSHMARK (SP);
1469 PUTBACK;
1470 call_sv (sv_hook, G_DISCARD);
1471 SPAGAIN;
1472
1473 FREETMPS;
1474 LEAVE;
1475 }
1476
1477 if (xs_hook)
1478 xs_hook ();
1479
1480 return 1;
1481}
1482
1483static int
1484api_is_ready (SV *coro_sv)
1485{
1486 dTHX;
1487 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1488}
1489
950static void 1490static void
951api_ready (SV *coro) 1491prepare_schedule (pTHX_ struct transfer_args *ta)
952{ 1492{
953 dTHX; 1493 SV *prev_sv, *next_sv;
954 1494
955 if (SvROK (coro)) 1495 for (;;)
956 coro = SvRV (coro); 1496 {
1497 LOCK;
1498 next_sv = coro_deq (aTHX);
1499
1500 /* nothing to schedule: call the idle handler */
1501 if (expect_false (!next_sv))
1502 {
1503 dSP;
1504 UNLOCK;
1505
1506 ENTER;
1507 SAVETMPS;
1508
1509 PUSHMARK (SP);
1510 PUTBACK;
1511 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1512 SPAGAIN;
1513
1514 FREETMPS;
1515 LEAVE;
1516 continue;
1517 }
1518
1519 ta->next = SvSTATE (next_sv);
1520
1521 /* cannot transfer to destroyed coros, skip and look for next */
1522 if (expect_false (ta->next->flags & CF_DESTROYED))
1523 {
1524 UNLOCK;
1525 SvREFCNT_dec (next_sv);
1526 /* coro_nready is already taken care of by destroy */
1527 continue;
1528 }
1529
1530 --coro_nready;
1531 UNLOCK;
1532 break;
1533 }
1534
1535 /* free this only after the transfer */
1536 prev_sv = SvRV (coro_current);
1537 ta->prev = SvSTATE (prev_sv);
1538 TRANSFER_CHECK (*ta);
1539 assert (ta->next->flags & CF_READY);
1540 ta->next->flags &= ~CF_READY;
1541 SvRV_set (coro_current, next_sv);
957 1542
958 LOCK; 1543 LOCK;
959 coro_enq (SvREFCNT_inc (coro)); 1544 free_coro_mortal (aTHX);
1545 coro_mortal = prev_sv;
960 UNLOCK; 1546 UNLOCK;
961} 1547}
962 1548
963static void 1549static void
964prepare_schedule (struct transfer_args *ta)
965{
966 SV *current, *prev, *next;
967
968 current = GvSV (coro_current);
969
970 for (;;)
971 {
972 LOCK;
973 next = coro_deq (PRIO_MIN);
974 UNLOCK;
975
976 if (next)
977 break;
978
979 {
980 dSP;
981
982 ENTER;
983 SAVETMPS;
984
985 PUSHMARK (SP);
986 PUTBACK;
987 call_sv (GvSV (coro_idle), G_DISCARD);
988
989 FREETMPS;
990 LEAVE;
991 }
992 }
993
994 prev = SvRV (current);
995 SvRV (current) = next;
996
997 /* free this only after the transfer */
998 LOCK;
999 free_coro_mortal ();
1000 UNLOCK;
1001 coro_mortal = prev;
1002
1003 ta->prev = SvSTATE (prev);
1004 ta->next = SvSTATE (next);
1005 ta->flags = TRANSFER_SAVE_ALL;
1006}
1007
1008static void
1009prepare_cede (struct transfer_args *ta) 1550prepare_cede (pTHX_ struct transfer_args *ta)
1010{ 1551{
1011 LOCK; 1552 api_ready (coro_current);
1012 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013 UNLOCK;
1014
1015 prepare_schedule (ta); 1553 prepare_schedule (aTHX_ ta);
1554}
1555
1556static int
1557prepare_cede_notself (pTHX_ struct transfer_args *ta)
1558{
1559 if (coro_nready)
1560 {
1561 SV *prev = SvRV (coro_current);
1562 prepare_schedule (aTHX_ ta);
1563 api_ready (prev);
1564 return 1;
1565 }
1566 else
1567 return 0;
1016} 1568}
1017 1569
1018static void 1570static void
1019api_schedule (void) 1571api_schedule (void)
1020{ 1572{
1021 dTHX; 1573 dTHX;
1022 struct transfer_args ta; 1574 struct transfer_args ta;
1023 1575
1024 prepare_schedule (&ta); 1576 prepare_schedule (aTHX_ &ta);
1025 TRANSFER (ta); 1577 TRANSFER (ta, 1);
1026} 1578}
1027 1579
1028static void 1580static int
1029api_cede (void) 1581api_cede (void)
1030{ 1582{
1031 dTHX; 1583 dTHX;
1032 struct transfer_args ta; 1584 struct transfer_args ta;
1033 1585
1034 prepare_cede (&ta); 1586 prepare_cede (aTHX_ &ta);
1587
1588 if (expect_true (ta.prev != ta.next))
1589 {
1035 TRANSFER (ta); 1590 TRANSFER (ta, 1);
1591 return 1;
1592 }
1593 else
1594 return 0;
1036} 1595}
1037 1596
1597static int
1598api_cede_notself (void)
1599{
1600 dTHX;
1601 struct transfer_args ta;
1602
1603 if (prepare_cede_notself (aTHX_ &ta))
1604 {
1605 TRANSFER (ta, 1);
1606 return 1;
1607 }
1608 else
1609 return 0;
1610}
1611
1612static void
1613api_trace (SV *coro_sv, int flags)
1614{
1615 dTHX;
1616 struct coro *coro = SvSTATE (coro_sv);
1617
1618 if (flags & CC_TRACE)
1619 {
1620 if (!coro->cctx)
1621 coro->cctx = cctx_new ();
1622 else if (!(coro->cctx->flags & CC_TRACE))
1623 croak ("cannot enable tracing on coroutine with custom stack");
1624
1625 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1626 }
1627 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1628 {
1629 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1630
1631 if (coro->flags & CF_RUNNING)
1632 PL_runops = RUNOPS_DEFAULT;
1633 else
1634 coro->slot->runops = RUNOPS_DEFAULT;
1635 }
1636}
1637
1638static int
1639coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1640{
1641 AV *padlist;
1642 AV *av = (AV *)mg->mg_obj;
1643
1644 abort ();
1645
1646 return 0;
1647}
1648
1649static MGVTBL coro_gensub_vtbl = {
1650 0, 0, 0, 0,
1651 coro_gensub_free
1652};
1653
1654/*****************************************************************************/
1655/* PerlIO::cede */
1656
1657typedef struct
1658{
1659 PerlIOBuf base;
1660 NV next, every;
1661} PerlIOCede;
1662
1663static IV
1664PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1665{
1666 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1667
1668 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1669 self->next = nvtime () + self->every;
1670
1671 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1672}
1673
1674static SV *
1675PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1676{
1677 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1678
1679 return newSVnv (self->every);
1680}
1681
1682static IV
1683PerlIOCede_flush (pTHX_ PerlIO *f)
1684{
1685 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686 double now = nvtime ();
1687
1688 if (now >= self->next)
1689 {
1690 api_cede ();
1691 self->next = now + self->every;
1692 }
1693
1694 return PerlIOBuf_flush (aTHX_ f);
1695}
1696
1697static PerlIO_funcs PerlIO_cede =
1698{
1699 sizeof(PerlIO_funcs),
1700 "cede",
1701 sizeof(PerlIOCede),
1702 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1703 PerlIOCede_pushed,
1704 PerlIOBuf_popped,
1705 PerlIOBuf_open,
1706 PerlIOBase_binmode,
1707 PerlIOCede_getarg,
1708 PerlIOBase_fileno,
1709 PerlIOBuf_dup,
1710 PerlIOBuf_read,
1711 PerlIOBuf_unread,
1712 PerlIOBuf_write,
1713 PerlIOBuf_seek,
1714 PerlIOBuf_tell,
1715 PerlIOBuf_close,
1716 PerlIOCede_flush,
1717 PerlIOBuf_fill,
1718 PerlIOBase_eof,
1719 PerlIOBase_error,
1720 PerlIOBase_clearerr,
1721 PerlIOBase_setlinebuf,
1722 PerlIOBuf_get_base,
1723 PerlIOBuf_bufsiz,
1724 PerlIOBuf_get_ptr,
1725 PerlIOBuf_get_cnt,
1726 PerlIOBuf_set_ptrcnt,
1727};
1728
1729
1038MODULE = Coro::State PACKAGE = Coro::State 1730MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039 1731
1040PROTOTYPES: DISABLE 1732PROTOTYPES: DISABLE
1041 1733
1042BOOT: 1734BOOT:
1043{ 1735{
1044#ifdef USE_ITHREADS 1736#ifdef USE_ITHREADS
1045 MUTEX_INIT (&coro_mutex); 1737 MUTEX_INIT (&coro_mutex);
1046#endif 1738#endif
1047 BOOT_PAGESIZE; 1739 BOOT_PAGESIZE;
1048 1740
1741 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1742 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1743
1744 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1745 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1746 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1747
1748 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1749 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1750 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1751
1049 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1752 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050 1753
1051 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1754 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1755 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1756 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1757 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054 1758
1055 main_mainstack = PL_mainstack; 1759 main_mainstack = PL_mainstack;
1760 main_top_env = PL_top_env;
1056 1761
1762 while (main_top_env->je_prev)
1763 main_top_env = main_top_env->je_prev;
1764
1057 coroapi.ver = CORO_API_VERSION; 1765 coroapi.ver = CORO_API_VERSION;
1766 coroapi.rev = CORO_API_REVISION;
1058 coroapi.transfer = api_transfer; 1767 coroapi.transfer = api_transfer;
1768
1769 {
1770 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1771
1772 if (!svp) croak ("Time::HiRes is required");
1773 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1774
1775 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1776 }
1059 1777
1060 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1778 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1061} 1779}
1062 1780
1063SV * 1781SV *
1064new (char *klass, ...) 1782new (char *klass, ...)
1065 CODE: 1783 CODE:
1066{ 1784{
1067 struct coro *coro; 1785 struct coro *coro;
1786 MAGIC *mg;
1068 HV *hv; 1787 HV *hv;
1069 int i; 1788 int i;
1070 1789
1071 Newz (0, coro, 1, struct coro); 1790 Newz (0, coro, 1, struct coro);
1072 coro->args = newAV (); 1791 coro->args = newAV ();
1792 coro->flags = CF_NEW;
1073 1793
1794 if (coro_first) coro_first->prev = coro;
1795 coro->next = coro_first;
1796 coro_first = coro;
1797
1074 hv = newHV (); 1798 coro->hv = hv = newHV ();
1075 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1799 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1800 mg->mg_flags |= MGf_DUP;
1076 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1801 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077 1802
1803 av_extend (coro->args, items - 1);
1078 for (i = 1; i < items; i++) 1804 for (i = 1; i < items; i++)
1079 av_push (coro->args, newSVsv (ST (i))); 1805 av_push (coro->args, newSVsv (ST (i)));
1080
1081 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1082 /*coro->stack = 0;*/
1083} 1806}
1084 OUTPUT: 1807 OUTPUT:
1085 RETVAL 1808 RETVAL
1086 1809
1810# these not obviously related functions are all rolled into the same xs
1811# function to increase chances that they all will call transfer with the same
1812# stack offset
1087void 1813void
1088_set_stacklevel (...) 1814_set_stacklevel (...)
1089 ALIAS: 1815 ALIAS:
1090 Coro::State::transfer = 1 1816 Coro::State::transfer = 1
1091 Coro::schedule = 2 1817 Coro::schedule = 2
1092 Coro::cede = 3 1818 Coro::cede = 3
1093 Coro::Cont::yield = 4 1819 Coro::cede_notself = 4
1094 CODE: 1820 CODE:
1095{ 1821{
1096 struct transfer_args ta; 1822 struct transfer_args ta;
1097 1823
1824 PUTBACK;
1098 switch (ix) 1825 switch (ix)
1099 { 1826 {
1100 case 0: 1827 case 0:
1101 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1828 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102 ta.next = 0; 1829 ta.next = 0;
1103 ta.flags = TRANSFER_SET_STACKLEVEL;
1104 break; 1830 break;
1105 1831
1106 case 1: 1832 case 1:
1107 if (items != 3) 1833 if (items != 2)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1834 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109 1835
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1836 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111 break; 1837 break;
1112 1838
1113 case 2: 1839 case 2:
1114 prepare_schedule (&ta); 1840 prepare_schedule (aTHX_ &ta);
1115 break; 1841 break;
1116 1842
1117 case 3: 1843 case 3:
1118 prepare_cede (&ta); 1844 prepare_cede (aTHX_ &ta);
1119 break; 1845 break;
1120 1846
1121 case 4: 1847 case 4:
1122 { 1848 if (!prepare_cede_notself (aTHX_ &ta))
1123 SV *yieldstack; 1849 XSRETURN_EMPTY;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126 1850
1127 yieldstack = *hv_fetch (
1128 (HV *)SvRV (GvSV (coro_current)),
1129 "yieldstack", sizeof ("yieldstack") - 1,
1130 0
1131 );
1132
1133 /* set up @_ -- ugly */
1134 av_clear (defav);
1135 av_fill (defav, items - 1);
1136 while (items--)
1137 av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139 sv = av_pop ((AV *)SvRV (yieldstack));
1140 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142 ta.flags = 0;
1143 SvREFCNT_dec (sv);
1144 }
1145 break; 1851 break;
1146
1147 } 1852 }
1853 SPAGAIN;
1148 1854
1855 BARRIER;
1856 PUTBACK;
1149 TRANSFER (ta); 1857 TRANSFER (ta, 0);
1858 SPAGAIN; /* might be the sp of a different coroutine now */
1859 /* be extra careful not to ever do anything after TRANSFER */
1150} 1860}
1861
1862bool
1863_destroy (SV *coro_sv)
1864 CODE:
1865 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1866 OUTPUT:
1867 RETVAL
1151 1868
1152void 1869void
1153_clone_state_from (SV *dst, SV *src)
1154 CODE:
1155{
1156 struct coro *coro_src = SvSTATE (src);
1157
1158 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160 ++coro_src->refcnt;
1161 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162}
1163
1164void
1165_exit (code) 1870_exit (int code)
1166 int code
1167 PROTOTYPE: $ 1871 PROTOTYPE: $
1168 CODE: 1872 CODE:
1169 _exit (code); 1873 _exit (code);
1170 1874
1875int
1876cctx_stacksize (int new_stacksize = 0)
1877 CODE:
1878 RETVAL = coro_stacksize;
1879 if (new_stacksize)
1880 coro_stacksize = new_stacksize;
1881 OUTPUT:
1882 RETVAL
1883
1884int
1885cctx_count ()
1886 CODE:
1887 RETVAL = cctx_count;
1888 OUTPUT:
1889 RETVAL
1890
1891int
1892cctx_idle ()
1893 CODE:
1894 RETVAL = cctx_idle;
1895 OUTPUT:
1896 RETVAL
1897
1898void
1899list ()
1900 PPCODE:
1901{
1902 struct coro *coro;
1903 for (coro = coro_first; coro; coro = coro->next)
1904 if (coro->hv)
1905 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1906}
1907
1908void
1909call (Coro::State coro, SV *coderef)
1910 ALIAS:
1911 eval = 1
1912 CODE:
1913{
1914 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1915 {
1916 struct coro temp;
1917
1918 if (!(coro->flags & CF_RUNNING))
1919 {
1920 PUTBACK;
1921 save_perl (aTHX_ &temp);
1922 load_perl (aTHX_ coro);
1923 }
1924
1925 {
1926 dSP;
1927 ENTER;
1928 SAVETMPS;
1929 PUTBACK;
1930 PUSHSTACK;
1931 PUSHMARK (SP);
1932
1933 if (ix)
1934 eval_sv (coderef, 0);
1935 else
1936 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1937
1938 POPSTACK;
1939 SPAGAIN;
1940 FREETMPS;
1941 LEAVE;
1942 PUTBACK;
1943 }
1944
1945 if (!(coro->flags & CF_RUNNING))
1946 {
1947 save_perl (aTHX_ coro);
1948 load_perl (aTHX_ &temp);
1949 SPAGAIN;
1950 }
1951 }
1952}
1953
1954SV *
1955is_ready (Coro::State coro)
1956 PROTOTYPE: $
1957 ALIAS:
1958 is_ready = CF_READY
1959 is_running = CF_RUNNING
1960 is_new = CF_NEW
1961 is_destroyed = CF_DESTROYED
1962 CODE:
1963 RETVAL = boolSV (coro->flags & ix);
1964 OUTPUT:
1965 RETVAL
1966
1967void
1968api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1969
1970SV *
1971has_cctx (Coro::State coro)
1972 PROTOTYPE: $
1973 CODE:
1974 RETVAL = boolSV (!!coro->cctx);
1975 OUTPUT:
1976 RETVAL
1977
1978int
1979is_traced (Coro::State coro)
1980 PROTOTYPE: $
1981 CODE:
1982 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1983 OUTPUT:
1984 RETVAL
1985
1986IV
1987rss (Coro::State coro)
1988 PROTOTYPE: $
1989 ALIAS:
1990 usecount = 1
1991 CODE:
1992 switch (ix)
1993 {
1994 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1995 case 1: RETVAL = coro->usecount; break;
1996 }
1997 OUTPUT:
1998 RETVAL
1999
2000void
2001force_cctx ()
2002 CODE:
2003 struct coro *coro = SvSTATE (coro_current);
2004 coro->cctx->idle_sp = 0;
2005
2006void
2007throw (Coro::State self, SV *throw = &PL_sv_undef)
2008 PROTOTYPE: $;$
2009 CODE:
2010 SvREFCNT_dec (self->throw);
2011 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2012
2013void
2014swap_defsv (Coro::State self)
2015 PROTOTYPE: $
2016 ALIAS:
2017 swap_defav = 1
2018 CODE:
2019 if (!self->slot)
2020 croak ("cannot swap state with coroutine that has no saved state");
2021 else
2022 {
2023 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2024 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2025
2026 SV *tmp = *src; *src = *dst; *dst = tmp;
2027 }
2028
1171MODULE = Coro::State PACKAGE = Coro 2029MODULE = Coro::State PACKAGE = Coro
1172 2030
1173BOOT: 2031BOOT:
1174{ 2032{
1175 int i; 2033 int i;
1176 2034
2035 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2036 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2037 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2038
2039 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2040 SvREADONLY_on (coro_current);
2041
1177 coro_stash = gv_stashpv ("Coro", TRUE); 2042 coro_stash = gv_stashpv ("Coro", TRUE);
1178 2043
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2044 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2045 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2046 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2047 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2048 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2049 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185 2050
1186 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1187 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1188
1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2051 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 2052 coro_ready[i] = newAV ();
1191 2053
1192 { 2054 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 2055 SV *sv = perl_get_sv ("Coro::API", TRUE);
2056 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194 2057
1195 coroapi.schedule = api_schedule; 2058 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede; 2059 coroapi.cede = api_cede;
2060 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 2061 coroapi.ready = api_ready;
2062 coroapi.is_ready = api_is_ready;
1198 coroapi.nready = &coro_nready; 2063 coroapi.nready = &coro_nready;
1199 coroapi.current = coro_current; 2064 coroapi.current = coro_current;
1200 2065
1201 GCoroAPI = &coroapi; 2066 GCoroAPI = &coroapi;
1202 sv_setiv (sv, (IV)&coroapi); 2067 sv_setiv (sv, (IV)&coroapi);
1203 SvREADONLY_on (sv); 2068 SvREADONLY_on (sv);
1204 } 2069 }
1205} 2070}
2071
2072void
2073_set_current (SV *current)
2074 PROTOTYPE: $
2075 CODE:
2076 SvREFCNT_dec (SvRV (coro_current));
2077 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2078
2079void
2080_set_readyhook (SV *hook)
2081 PROTOTYPE: $
2082 CODE:
2083 LOCK;
2084 SvREFCNT_dec (coro_readyhook);
2085 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2086 UNLOCK;
1206 2087
1207int 2088int
1208prio (Coro::State coro, int newprio = 0) 2089prio (Coro::State coro, int newprio = 0)
1209 ALIAS: 2090 ALIAS:
1210 nice = 1 2091 nice = 1
… …
1213 RETVAL = coro->prio; 2094 RETVAL = coro->prio;
1214 2095
1215 if (items > 1) 2096 if (items > 1)
1216 { 2097 {
1217 if (ix) 2098 if (ix)
1218 newprio += coro->prio; 2099 newprio = coro->prio - newprio;
1219 2100
1220 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2101 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2102 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222 2103
1223 coro->prio = newprio; 2104 coro->prio = newprio;
1224 } 2105 }
1225} 2106}
2107 OUTPUT:
2108 RETVAL
1226 2109
1227void 2110SV *
1228ready (SV *self) 2111ready (SV *self)
1229 PROTOTYPE: $ 2112 PROTOTYPE: $
1230 CODE: 2113 CODE:
1231 api_ready (self); 2114 RETVAL = boolSV (api_ready (self));
2115 OUTPUT:
2116 RETVAL
1232 2117
1233int 2118int
1234nready (...) 2119nready (...)
1235 PROTOTYPE: 2120 PROTOTYPE:
1236 CODE: 2121 CODE:
1237 RETVAL = coro_nready; 2122 RETVAL = coro_nready;
1238 OUTPUT: 2123 OUTPUT:
1239 RETVAL 2124 RETVAL
1240 2125
1241MODULE = Coro::State PACKAGE = Coro::AIO 2126# for async_pool speedup
2127void
2128_pool_1 (SV *cb)
2129 CODE:
2130{
2131 struct coro *coro = SvSTATE (coro_current);
2132 HV *hv = (HV *)SvRV (coro_current);
2133 AV *defav = GvAV (PL_defgv);
2134 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2135 AV *invoke_av;
2136 int i, len;
2137
2138 if (!invoke)
2139 {
2140 SV *old = PL_diehook;
2141 PL_diehook = 0;
2142 SvREFCNT_dec (old);
2143 croak ("\3async_pool terminate\2\n");
2144 }
2145
2146 SvREFCNT_dec (coro->saved_deffh);
2147 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2148
2149 hv_store (hv, "desc", sizeof ("desc") - 1,
2150 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2151
2152 invoke_av = (AV *)SvRV (invoke);
2153 len = av_len (invoke_av);
2154
2155 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2156
2157 if (len > 0)
2158 {
2159 av_fill (defav, len - 1);
2160 for (i = 0; i < len; ++i)
2161 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2162 }
2163
2164 SvREFCNT_dec (invoke);
2165}
2166
2167void
2168_pool_2 (SV *cb)
2169 CODE:
2170{
2171 struct coro *coro = SvSTATE (coro_current);
2172
2173 sv_setsv (cb, &PL_sv_undef);
2174
2175 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2176 coro->saved_deffh = 0;
2177
2178 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2179 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2180 {
2181 SV *old = PL_diehook;
2182 PL_diehook = 0;
2183 SvREFCNT_dec (old);
2184 croak ("\3async_pool terminate\2\n");
2185 }
2186
2187 av_clear (GvAV (PL_defgv));
2188 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2189 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2190
2191 coro->prio = 0;
2192
2193 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2194 api_trace (coro_current, 0);
2195
2196 av_push (av_async_pool, newSVsv (coro_current));
2197}
2198
2199#if 0
2200
2201void
2202_generator_call (...)
2203 PROTOTYPE: @
2204 PPCODE:
2205 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2206 xxxx
2207 abort ();
1242 2208
1243SV * 2209SV *
1244_get_state () 2210gensub (SV *sub, ...)
1245 CODE: 2211 PROTOTYPE: &;@
2212 CODE:
1246{ 2213{
1247 struct { 2214 struct coro *coro;
1248 int errorno; 2215 MAGIC *mg;
1249 int laststype; 2216 CV *xcv;
1250 int laststatval; 2217 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1251 Stat_t statcache; 2218 int i;
1252 } data;
1253 2219
1254 data.errorno = errno; 2220 CvGV (ncv) = CvGV (cv);
1255 data.laststype = PL_laststype; 2221 CvFILE (ncv) = CvFILE (cv);
1256 data.laststatval = PL_laststatval;
1257 data.statcache = PL_statcache;
1258 2222
1259 RETVAL = newSVpvn ((char *)&data, sizeof data); 2223 Newz (0, coro, 1, struct coro);
2224 coro->args = newAV ();
2225 coro->flags = CF_NEW;
2226
2227 av_extend (coro->args, items - 1);
2228 for (i = 1; i < items; i++)
2229 av_push (coro->args, newSVsv (ST (i)));
2230
2231 CvISXSUB_on (ncv);
2232 CvXSUBANY (ncv).any_ptr = (void *)coro;
2233
2234 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2235
2236 CvXSUB (ncv) = CvXSUB (xcv);
2237 CvANON_on (ncv);
2238
2239 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2240 RETVAL = newRV_noinc ((SV *)ncv);
1260} 2241}
1261 OUTPUT: 2242 OUTPUT:
1262 RETVAL 2243 RETVAL
1263 2244
2245#endif
2246
2247
2248MODULE = Coro::State PACKAGE = Coro::AIO
2249
1264void 2250void
1265_set_state (char *data_) 2251_get_state (SV *self)
2252 PPCODE:
2253{
2254 AV *defav = GvAV (PL_defgv);
2255 AV *av = newAV ();
2256 int i;
2257 SV *data_sv = newSV (sizeof (struct io_state));
2258 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2259 SvCUR_set (data_sv, sizeof (struct io_state));
2260 SvPOK_only (data_sv);
2261
2262 data->errorno = errno;
2263 data->laststype = PL_laststype;
2264 data->laststatval = PL_laststatval;
2265 data->statcache = PL_statcache;
2266
2267 av_extend (av, AvFILLp (defav) + 1 + 1);
2268
2269 for (i = 0; i <= AvFILLp (defav); ++i)
2270 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2271
2272 av_push (av, data_sv);
2273
2274 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2275
2276 api_ready (self);
2277}
2278
2279void
2280_set_state (SV *state)
1266 PROTOTYPE: $ 2281 PROTOTYPE: $
2282 PPCODE:
2283{
2284 AV *av = (AV *)SvRV (state);
2285 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2286 int i;
2287
2288 errno = data->errorno;
2289 PL_laststype = data->laststype;
2290 PL_laststatval = data->laststatval;
2291 PL_statcache = data->statcache;
2292
2293 EXTEND (SP, AvFILLp (av));
2294 for (i = 0; i < AvFILLp (av); ++i)
2295 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2296}
2297
2298
2299MODULE = Coro::State PACKAGE = Coro::AnyEvent
2300
2301BOOT:
2302 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2303
2304SV *
2305_schedule (...)
2306 PROTOTYPE: @
1267 CODE: 2307 CODE:
1268{ 2308{
1269 struct { 2309 static int incede;
1270 int errorno;
1271 int laststype;
1272 int laststatval;
1273 Stat_t statcache;
1274 } *data = (void *)data_;
1275 2310
1276 errno = data->errorno; 2311 api_cede_notself ();
1277 PL_laststype = data->laststype; 2312
1278 PL_laststatval = data->laststatval; 2313 ++incede;
1279 PL_statcache = data->statcache; 2314 while (coro_nready >= incede && api_cede ())
2315 ;
2316
2317 sv_setsv (sv_activity, &PL_sv_undef);
2318 if (coro_nready >= incede)
2319 {
2320 PUSHMARK (SP);
2321 PUTBACK;
2322 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2323 SPAGAIN;
2324 }
2325
2326 --incede;
1280} 2327}
2328
2329
2330MODULE = Coro::State PACKAGE = PerlIO::cede
2331
2332BOOT:
2333 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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