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Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.250 by root, Wed Oct 22 16:34:07 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"
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
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
8 58
9#define PERL_VERSION_ATLEAST(a,b,c) \ 59#define PERL_VERSION_ATLEAST(a,b,c) \
10 (PERL_REVISION > (a) \ 60 (PERL_REVISION > (a) \
11 || (PERL_REVISION == (a) \ 61 || (PERL_REVISION == (a) \
12 && (PERL_VERSION > (b) \ 62 && (PERL_VERSION > (b) \
… …
31# ifndef IS_PADCONST 81# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
33# endif 83# endif
34#endif 84#endif
35 85
36#include <stdio.h> 86/* 5.8.8 */
37#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#ifndef SvREFCNT_inc_NN
94# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
95#endif
96
97/* 5.11 */
98#ifndef CxHASARGS
99# define CxHASARGS(cx) (cx)->blk_sub.hasargs
100#endif
101
102/* 5.8.7 */
103#ifndef SvRV_set
104# define SvRV_set(s,v) SvRV(s) = (v)
105#endif
38 106
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 107#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40# undef STACKGUARD 108# undef CORO_STACKGUARD
41#endif
42
43#ifndef STACKGUARD
44# define STACKGUARD 0
45#endif
46
47#ifdef HAVE_MMAP
48# include <unistd.h>
49# include <sys/mman.h>
50# ifndef MAP_ANONYMOUS
51# ifdef MAP_ANON
52# define MAP_ANONYMOUS MAP_ANON
53# else
54# undef HAVE_MMAP
55# endif
56# endif 109#endif
57# include <limits.h> 110
58# ifndef PAGESIZE 111#ifndef CORO_STACKGUARD
59# define PAGESIZE pagesize 112# define CORO_STACKGUARD 0
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61static long pagesize;
62# else
63# define BOOT_PAGESIZE
64# endif 113#endif
65#endif
66 114
67/* The next macro should declare a variable stacklevel that contains and approximation 115/* prefer perl internal functions over our own? */
68 * to the current C stack pointer. Its property is that it changes with each call 116#ifndef CORO_PREFER_PERL_FUNCTIONS
69 * and should be unique. */ 117# define CORO_PREFER_PERL_FUNCTIONS 0
118#endif
119
120/* The next macros try to return the current stack pointer, in an as
121 * portable way as possible. */
70#define dSTACKLEVEL int stacklevel 122#define dSTACKLEVEL volatile char stacklevel
71#define STACKLEVEL ((void *)&stacklevel) 123#define STACKLEVEL ((void *)&stacklevel)
72 124
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 125#define IN_DESTRUCT (PL_main_cv == Nullcv)
74 126
75#if __GNUC__ >= 3 127#if __GNUC__ >= 3
76# define attribute(x) __attribute__(x) 128# define attribute(x) __attribute__(x)
129# define BARRIER __asm__ __volatile__ ("" : : : "memory")
130# define expect(expr,value) __builtin_expect ((expr),(value))
77#else 131#else
78# define attribute(x) 132# define attribute(x)
133# define BARRIER
134# define expect(expr,value) (expr)
79#endif 135#endif
136
137#define expect_false(expr) expect ((expr) != 0, 0)
138#define expect_true(expr) expect ((expr) != 0, 1)
80 139
81#define NOINLINE attribute ((noinline)) 140#define NOINLINE attribute ((noinline))
82 141
83#include "CoroAPI.h" 142#include "CoroAPI.h"
84
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86 143
87#ifdef USE_ITHREADS 144#ifdef USE_ITHREADS
88static perl_mutex coro_mutex; 145static perl_mutex coro_mutex;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 146# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 147# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91#else 148#else
92# define LOCK (void)0 149# define LOCK (void)0
93# define UNLOCK (void)0 150# define UNLOCK (void)0
94#endif 151#endif
95 152
153/* helper storage struct for Coro::AIO */
154struct io_state
155{
156 AV *res;
157 int errorno;
158 I32 laststype;
159 int laststatval;
160 Stat_t statcache;
161};
162
163static double (*nvtime)(); /* so why doesn't it take void? */
164
165static size_t coro_stacksize = CORO_STACKSIZE;
96static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
97static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
98static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
99static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
100 197
101/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 199typedef struct coro_cctx {
103 struct coro_stack *next; 200 struct coro_cctx *next;
104 201
105 /* the stack */ 202 /* the stack */
106 void *sptr; 203 void *sptr;
107 long ssize; /* positive == mmap, otherwise malloc */ 204 size_t ssize;
108 205
109 /* cpu state */ 206 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 207 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
208 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111 JMPENV *top_env; 209 JMPENV *top_env;
112 coro_context cctx; 210 coro_context cctx;
113} coro_stack; 211
212#if CORO_USE_VALGRIND
213 int valgrind_id;
214#endif
215 unsigned char flags;
216} coro_cctx;
217
218enum {
219 CF_RUNNING = 0x0001, /* coroutine is running */
220 CF_READY = 0x0002, /* coroutine is ready */
221 CF_NEW = 0x0004, /* has never been switched to */
222 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
223};
224
225/* the structure where most of the perl state is stored, overlaid on the cxstack */
226typedef struct {
227 SV *defsv;
228 AV *defav;
229 SV *errsv;
230 SV *irsgv;
231#define VAR(name,type) type name;
232# include "state.h"
233#undef VAR
234} perl_slots;
235
236#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 237
115/* this is a structure representing a perl-level coroutine */ 238/* this is a structure representing a perl-level coroutine */
116struct coro { 239struct coro {
117 /* the c coroutine allocated to this perl coroutine, if any */ 240 /* the c coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 241 coro_cctx *cctx;
119 242
120 /* data associated with this coroutine (initial args) */ 243 /* process data */
121 AV *args;
122 int refcnt;
123
124 /* optionally saved, might be zero */
125 AV *defav;
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 244 AV *mainstack;
137 SV **stack_sp; 245 perl_slots *slot; /* basically the saved sp */
138 OP *op; 246
139 SV **curpad; 247 AV *args; /* data associated with this coroutine (initial args) */
140 AV *comppad; 248 int refcnt; /* coroutines are refcounted, yes */
141 CV *compcv; 249 int flags; /* CF_ flags */
142 SV **stack_base; 250 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 251
144 SV **tmps_stack; 252 /* statistics */
145 I32 tmps_floor; 253 int usecount; /* number of transfers to this coro */
146 I32 tmps_ix;
147 I32 tmps_max;
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 254
163 /* coro process data */ 255 /* coro process data */
164 int prio; 256 int prio;
257 SV *throw; /* exception to be thrown */
258
259 /* async_pool */
260 SV *saved_deffh;
261
262 /* linked list */
263 struct coro *next, *prev;
165}; 264};
166 265
167typedef struct coro *Coro__State; 266typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 267typedef struct coro *Coro__State_or_hashref;
169 268
269/** Coro ********************************************************************/
270
271#define PRIO_MAX 3
272#define PRIO_HIGH 1
273#define PRIO_NORMAL 0
274#define PRIO_LOW -1
275#define PRIO_IDLE -3
276#define PRIO_MIN -4
277
278/* for Coro.pm */
279static SV *coro_current;
280static SV *coro_readyhook;
281static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
282static int coro_nready;
283static struct coro *coro_first;
284
285/** lowlevel stuff **********************************************************/
286
287static SV *
288coro_get_sv (pTHX_ const char *name, int create)
289{
290#if PERL_VERSION_ATLEAST (5,10,0)
291 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
292 get_sv (name, create);
293#endif
294 return get_sv (name, create);
295}
296
170static AV * 297static AV *
298coro_get_av (pTHX_ const char *name, int create)
299{
300#if PERL_VERSION_ATLEAST (5,10,0)
301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
302 get_av (name, create);
303#endif
304 return get_av (name, create);
305}
306
307static HV *
308coro_get_hv (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_hv (name, create);
313#endif
314 return get_hv (name, create);
315}
316
317static AV *
171coro_clone_padlist (CV *cv) 318coro_clone_padlist (pTHX_ CV *cv)
172{ 319{
173 AV *padlist = CvPADLIST (cv); 320 AV *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 321 AV *newpadlist, *newpad;
175 322
176 newpadlist = newAV (); 323 newpadlist = newAV ();
177 AvREAL_off (newpadlist); 324 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0) 325#if PERL_VERSION_ATLEAST (5,10,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 326 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else 327#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 328 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 329#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 330 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist); 331 --AvFILLp (padlist);
185 332
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 333 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
187 av_store (newpadlist, 1, (SV *)newpad); 334 av_store (newpadlist, 1, (SV *)newpad);
188 335
189 return newpadlist; 336 return newpadlist;
190} 337}
191 338
192static void 339static void
193free_padlist (AV *padlist) 340free_padlist (pTHX_ AV *padlist)
194{ 341{
195 /* may be during global destruction */ 342 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 343 if (SvREFCNT (padlist))
197 { 344 {
198 I32 i = AvFILLp (padlist); 345 I32 i = AvFILLp (padlist);
… …
219 AV *padlist; 366 AV *padlist;
220 AV *av = (AV *)mg->mg_obj; 367 AV *av = (AV *)mg->mg_obj;
221 368
222 /* casting is fun. */ 369 /* casting is fun. */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 370 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224 free_padlist (padlist); 371 free_padlist (aTHX_ padlist);
225 372
226 SvREFCNT_dec (av); 373 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
227 374
228 return 0; 375 return 0;
229} 376}
230 377
231#define PERL_MAGIC_coro PERL_MAGIC_ext 378#define CORO_MAGIC_type_cv PERL_MAGIC_ext
379#define CORO_MAGIC_type_state PERL_MAGIC_ext
232 380
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 381static MGVTBL coro_cv_vtbl = {
382 0, 0, 0, 0,
383 coro_cv_free
384};
385
386#define CORO_MAGIC(sv,type) \
387 SvMAGIC (sv) \
388 ? SvMAGIC (sv)->mg_type == type \
389 ? SvMAGIC (sv) \
390 : mg_find (sv, type) \
391 : 0
392
393#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
394#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
395
396static struct coro *
397SvSTATE_ (pTHX_ SV *coro)
398{
399 HV *stash;
400 MAGIC *mg;
401
402 if (SvROK (coro))
403 coro = SvRV (coro);
404
405 if (expect_false (SvTYPE (coro) != SVt_PVHV))
406 croak ("Coro::State object required");
407
408 stash = SvSTASH (coro);
409 if (expect_false (stash != coro_stash && stash != coro_state_stash))
410 {
411 /* very slow, but rare, check */
412 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
413 croak ("Coro::State object required");
414 }
415
416 mg = CORO_MAGIC_state (coro);
417 return (struct coro *)mg->mg_ptr;
418}
419
420#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
234 421
235/* the next two functions merely cache the padlists */ 422/* the next two functions merely cache the padlists */
236static void 423static void
237get_padlist (CV *cv) 424get_padlist (pTHX_ CV *cv)
238{ 425{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 426 MAGIC *mg = CORO_MAGIC_cv (cv);
427 AV *av;
240 428
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 429 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 430 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 431 else
244 { 432 {
245#if 0 433#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 434 /* this is probably cleaner? but also slower! */
435 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 436 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 437 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 438 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 439 SvREFCNT_dec (cp);
251#else 440#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 441 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 442#endif
254 } 443 }
255} 444}
256 445
257static void 446static void
258put_padlist (CV *cv) 447put_padlist (pTHX_ CV *cv)
259{ 448{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 449 MAGIC *mg = CORO_MAGIC_cv (cv);
450 AV *av;
261 451
262 if (!mg) 452 if (expect_false (!mg))
263 { 453 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266 mg->mg_virtual = &vtbl_coro;
267 mg->mg_obj = (SV *)newAV ();
268 }
269 454
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 455 av = (AV *)mg->mg_obj;
271}
272 456
273#define SB do { 457 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274#define SE } while (0) 458 av_extend (av, AvMAX (av) + 1);
275 459
276#define LOAD(state) load_state((state)); 460 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277#define SAVE(state,flags) save_state((state),(flags)); 461}
278 462
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 463/** load & save, init *******************************************************/
280 464
281static void 465static void
282load_state(Coro__State c) 466load_perl (pTHX_ Coro__State c)
283{ 467{
284 PL_dowarn = c->dowarn; 468 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 469 c->slot = 0;
286 470
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 471 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 472
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 473 GvSV (PL_defgv) = slot->defsv;
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 474 GvAV (PL_defgv) = slot->defav;
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 475 GvSV (PL_errgv) = slot->errsv;
476 GvSV (irsgv) = slot->irsgv;
477
478 #define VAR(name,type) PL_ ## name = slot->name;
479 # include "state.h"
480 #undef VAR
321 481
322 { 482 {
323 dSP; 483 dSP;
484
324 CV *cv; 485 CV *cv;
325 486
326 /* now do the ugly restore mess */ 487 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 488 while (expect_true (cv = (CV *)POPs))
328 { 489 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 490 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 491 CvDEPTH (cv) = PTR2IV (POPs);
335 } 492 CvPADLIST (cv) = (AV *)POPs;
336
337 ++CvDEPTH(cv);
338 } 493 }
339 494
340 PUTBACK; 495 PUTBACK;
341 } 496 }
342} 497}
343 498
344static void 499static void
345save_state(Coro__State c, int flags) 500save_perl (pTHX_ Coro__State c)
346{ 501{
347 { 502 {
348 dSP; 503 dSP;
349 I32 cxix = cxstack_ix; 504 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 505 PERL_CONTEXT *ccstk = cxstack;
… …
353 /* 508 /*
354 * the worst thing you can imagine happens first - we have to save 509 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 510 * (and reinitialize) all cv's in the whole callchain :(
356 */ 511 */
357 512
358 PUSHs (Nullsv); 513 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 514 /* this loop was inspired by pp_caller */
360 for (;;) 515 for (;;)
361 { 516 {
362 while (cxix >= 0) 517 while (expect_true (cxix >= 0))
363 { 518 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 519 PERL_CONTEXT *cx = &ccstk[cxix--];
365 520
366 if (CxTYPE(cx) == CXt_SUB) 521 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
367 { 522 {
368 CV *cv = cx->blk_sub.cv; 523 CV *cv = cx->blk_sub.cv;
524
369 if (CvDEPTH(cv)) 525 if (expect_true (CvDEPTH (cv)))
370 { 526 {
371 EXTEND (SP, CvDEPTH(cv)*2); 527 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 528 PUSHs ((SV *)CvPADLIST (cv));
529 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 530 PUSHs ((SV *)cv);
382 531
532 CvDEPTH (cv) = 0;
383 get_padlist (cv); 533 get_padlist (aTHX_ cv);
384 } 534 }
385 } 535 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 536 }
395 537
396 if (top_si->si_type == PERLSI_MAIN) 538 if (expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 539 break;
398 540
399 top_si = top_si->si_prev; 541 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 542 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 543 cxix = top_si->si_cxix;
402 } 544 }
403 545
404 PUTBACK; 546 PUTBACK;
405 } 547 }
406 548
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 549 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 550 /* we manually unroll here, as usually 2 slots is enough */
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 551 if (SLOT_COUNT >= 1) CXINC;
552 if (SLOT_COUNT >= 2) CXINC;
553 if (SLOT_COUNT >= 3) CXINC;
554 {
555 int i;
556 for (i = 3; i < SLOT_COUNT; ++i)
557 CXINC;
558 }
559 cxstack_ix -= SLOT_COUNT; /* undo allocation */
410 560
411 c->dowarn = PL_dowarn;
412 c->in_eval = PL_in_eval;
413
414 c->curstackinfo = PL_curstackinfo;
415 c->curstack = PL_curstack;
416 c->mainstack = PL_mainstack; 561 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 562
418 c->op = PL_op; 563 {
419 c->curpad = PL_curpad; 564 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 565
421 c->compcv = PL_compcv; 566 slot->defav = GvAV (PL_defgv);
422 c->stack_base = PL_stack_base; 567 slot->defsv = DEFSV;
423 c->stack_max = PL_stack_max; 568 slot->errsv = ERRSV;
424 c->tmps_stack = PL_tmps_stack; 569 slot->irsgv = GvSV (irsgv);
425 c->tmps_floor = PL_tmps_floor; 570
426 c->tmps_ix = PL_tmps_ix; 571 #define VAR(name,type) slot->name = PL_ ## name;
427 c->tmps_max = PL_tmps_max; 572 # include "state.h"
428 c->markstack = PL_markstack; 573 #undef VAR
429 c->markstack_ptr = PL_markstack_ptr; 574 }
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif
442 c->curpm = PL_curpm;
443 c->curcop = PL_curcop;
444} 575}
445 576
446/* 577/*
447 * allocate various perl stacks. This is an exact copy 578 * allocate various perl stacks. This is an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 579 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 580 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 581 * not usually need a lot of stackspace.
451 */ 582 */
583#if CORO_PREFER_PERL_FUNCTIONS
584# define coro_init_stacks init_stacks
585#else
452static void 586static void
453coro_init_stacks () 587coro_init_stacks (pTHX)
454{ 588{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 589 PL_curstackinfo = new_stackinfo(32, 8);
456 PL_curstackinfo->si_type = PERLSI_MAIN; 590 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 591 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 592 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 593
460 PL_stack_base = AvARRAY(PL_curstack); 594 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 595 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 596 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 597
464 New(50,PL_tmps_stack,96,SV*); 598 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 599 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 600 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 601 PL_tmps_max = 32;
468 602
469 New(54,PL_markstack,16,I32); 603 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 604 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 605 PL_markstack_max = PL_markstack + 16;
472 606
473#ifdef SET_MARK_OFFSET 607#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 608 SET_MARK_OFFSET;
475#endif 609#endif
476 610
477 New(54,PL_scopestack,16,I32); 611 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 612 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 613 PL_scopestack_max = 8;
480 614
481 New(54,PL_savestack,96,ANY); 615 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 616 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 617 PL_savestack_max = 24;
484 618
485#if !PERL_VERSION_ATLEAST (5,9,0) 619#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 620 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 621 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 622 PL_retstack_max = 4;
489#endif 623#endif
490} 624}
625#endif
491 626
492/* 627/*
493 * destroy the stacks, the callchain etc... 628 * destroy the stacks, the callchain etc...
494 */ 629 */
495static void 630static void
496coro_destroy_stacks() 631coro_destroy_stacks (pTHX)
497{ 632{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 633 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 634 PL_curstackinfo = PL_curstackinfo->si_next;
511 635
512 while (PL_curstackinfo) 636 while (PL_curstackinfo)
513 { 637 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 638 PERL_SI *p = PL_curstackinfo->si_prev;
515 639
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 640 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 641 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 642
528 Safefree (PL_curstackinfo->si_cxstack); 643 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 644 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 645 PL_curstackinfo = p;
531 } 646 }
532 647
533 Safefree (PL_tmps_stack); 648 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 649 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 650 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 651 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 652#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 653 Safefree (PL_retstack);
539#endif 654#endif
540} 655}
541 656
657static size_t
658coro_rss (pTHX_ struct coro *coro)
659{
660 size_t rss = sizeof (*coro);
661
662 if (coro->mainstack)
663 {
664 perl_slots tmp_slot;
665 perl_slots *slot;
666
667 if (coro->flags & CF_RUNNING)
668 {
669 slot = &tmp_slot;
670
671 #define VAR(name,type) slot->name = PL_ ## name;
672 # include "state.h"
673 #undef VAR
674 }
675 else
676 slot = coro->slot;
677
678 if (slot)
679 {
680 rss += sizeof (slot->curstackinfo);
681 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
682 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
683 rss += slot->tmps_max * sizeof (SV *);
684 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
685 rss += slot->scopestack_max * sizeof (I32);
686 rss += slot->savestack_max * sizeof (ANY);
687
688#if !PERL_VERSION_ATLEAST (5,10,0)
689 rss += slot->retstack_max * sizeof (OP *);
690#endif
691 }
692 }
693
694 return rss;
695}
696
697/** coroutine stack handling ************************************************/
698
699static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
700static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
701static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
702
703/* apparently < 5.8.8 */
704#ifndef MgPV_nolen_const
705#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
706 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
707 (const char*)(mg)->mg_ptr)
708#endif
709
710/*
711 * This overrides the default magic get method of %SIG elements.
712 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
713 * and instead of tryign to save and restore the hash elements, we just provide
714 * readback here.
715 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
716 * not expecting this to actually change the hook. This is a potential problem
717 * when a schedule happens then, but we ignore this.
718 */
719static int
720coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
721{
722 const char *s = MgPV_nolen_const (mg);
723
724 if (*s == '_')
725 {
726 SV **svp = 0;
727
728 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
729 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
730
731 if (svp)
732 {
733 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
734 return 0;
735 }
736 }
737
738 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
739}
740
741static int
742coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
743{
744 const char *s = MgPV_nolen_const (mg);
745
746 if (*s == '_')
747 {
748 SV **svp = 0;
749
750 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
751 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
752
753 if (svp)
754 {
755 SV *old = *svp;
756 *svp = 0;
757 SvREFCNT_dec (old);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = newSVsv (sv);
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
787}
788
542static void 789static void
543setup_coro (struct coro *coro) 790coro_setup (pTHX_ struct coro *coro)
544{ 791{
545 /* 792 /*
546 * emulate part of the perl startup here. 793 * emulate part of the perl startup here.
547 */ 794 */
548
549 coro_init_stacks (); 795 coro_init_stacks (aTHX);
550 796
797 PL_runops = RUNOPS_DEFAULT;
798 PL_curcop = &PL_compiling;
799 PL_in_eval = EVAL_NULL;
551 PL_curcop = 0; 800 PL_comppad = 0;
552 PL_in_eval = 0;
553 PL_curpm = 0; 801 PL_curpm = 0;
802 PL_curpad = 0;
803 PL_localizing = 0;
804 PL_dirty = 0;
805 PL_restartop = 0;
806#if PERL_VERSION_ATLEAST (5,10,0)
807 PL_parser = 0;
808#endif
809
810 /* recreate the die/warn hooks */
811 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
812 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
813
814 GvSV (PL_defgv) = newSV (0);
815 GvAV (PL_defgv) = coro->args; coro->args = 0;
816 GvSV (PL_errgv) = newSV (0);
817 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
818 PL_rs = newSVsv (GvSV (irsgv));
819 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
554 820
555 { 821 {
556 dSP; 822 dSP;
557 LOGOP myop; 823 LOGOP myop;
558 824
559 /* I have no idea why this is needed, but it is */
560 PUSHMARK (SP);
561
562 SvREFCNT_dec (GvAV (PL_defgv));
563 GvAV (PL_defgv) = coro->args; coro->args = 0;
564
565 Zero (&myop, 1, LOGOP); 825 Zero (&myop, 1, LOGOP);
566 myop.op_next = Nullop; 826 myop.op_next = Nullop;
567 myop.op_flags = OPf_WANT_VOID; 827 myop.op_flags = OPf_WANT_VOID;
568 828
829 PUSHMARK (SP);
830 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
831 PUTBACK;
569 PL_op = (OP *)&myop; 832 PL_op = (OP *)&myop;
570
571 PUSHMARK (SP);
572 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573 PUTBACK;
574 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 833 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575 SPAGAIN; 834 SPAGAIN;
576
577 ENTER; /* necessary e.g. for dounwind */
578 } 835 }
836
837 /* this newly created coroutine might be run on an existing cctx which most
838 * likely was suspended in set_stacklevel, called from entersub.
839 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
840 * so we ENTER here for symmetry
841 */
842 ENTER;
579} 843}
580 844
581static void 845static void
846coro_destroy (pTHX_ struct coro *coro)
847{
848 if (!IN_DESTRUCT)
849 {
850 /* restore all saved variables and stuff */
851 LEAVE_SCOPE (0);
852 assert (PL_tmps_floor == -1);
853
854 /* free all temporaries */
855 FREETMPS;
856 assert (PL_tmps_ix == -1);
857
858 /* unwind all extra stacks */
859 POPSTACK_TO (PL_mainstack);
860
861 /* unwind main stack */
862 dounwind (-1);
863 }
864
865 SvREFCNT_dec (GvSV (PL_defgv));
866 SvREFCNT_dec (GvAV (PL_defgv));
867 SvREFCNT_dec (GvSV (PL_errgv));
868 SvREFCNT_dec (PL_defoutgv);
869 SvREFCNT_dec (PL_rs);
870 SvREFCNT_dec (GvSV (irsgv));
871
872 SvREFCNT_dec (PL_diehook);
873 SvREFCNT_dec (PL_warnhook);
874
875 SvREFCNT_dec (coro->saved_deffh);
876 SvREFCNT_dec (coro->throw);
877
878 coro_destroy_stacks (aTHX);
879}
880
881static void
582free_coro_mortal () 882free_coro_mortal (pTHX)
583{ 883{
584 if (coro_mortal) 884 if (expect_true (coro_mortal))
585 { 885 {
586 SvREFCNT_dec (coro_mortal); 886 SvREFCNT_dec (coro_mortal);
587 coro_mortal = 0; 887 coro_mortal = 0;
588 } 888 }
589} 889}
590 890
891static int
892runops_trace (pTHX)
893{
894 COP *oldcop = 0;
895 int oldcxix = -2;
896 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
897 coro_cctx *cctx = coro->cctx;
898
899 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
900 {
901 PERL_ASYNC_CHECK ();
902
903 if (cctx->flags & CC_TRACE_ALL)
904 {
905 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
906 {
907 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
908 SV **bot, **top;
909 AV *av = newAV (); /* return values */
910 SV **cb;
911 dSP;
912
913 GV *gv = CvGV (cx->blk_sub.cv);
914 SV *fullname = sv_2mortal (newSV (0));
915 if (isGV (gv))
916 gv_efullname3 (fullname, gv, 0);
917
918 bot = PL_stack_base + cx->blk_oldsp + 1;
919 top = cx->blk_gimme == G_ARRAY ? SP + 1
920 : cx->blk_gimme == G_SCALAR ? bot + 1
921 : bot;
922
923 av_extend (av, top - bot);
924 while (bot < top)
925 av_push (av, SvREFCNT_inc_NN (*bot++));
926
927 PL_runops = RUNOPS_DEFAULT;
928 ENTER;
929 SAVETMPS;
930 EXTEND (SP, 3);
931 PUSHMARK (SP);
932 PUSHs (&PL_sv_no);
933 PUSHs (fullname);
934 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
935 PUTBACK;
936 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
937 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
938 SPAGAIN;
939 FREETMPS;
940 LEAVE;
941 PL_runops = runops_trace;
942 }
943
944 if (oldcop != PL_curcop)
945 {
946 oldcop = PL_curcop;
947
948 if (PL_curcop != &PL_compiling)
949 {
950 SV **cb;
951
952 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
953 {
954 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
955
956 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
957 {
958 runops_proc_t old_runops = PL_runops;
959 dSP;
960 GV *gv = CvGV (cx->blk_sub.cv);
961 SV *fullname = sv_2mortal (newSV (0));
962
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 PL_runops = RUNOPS_DEFAULT;
967 ENTER;
968 SAVETMPS;
969 EXTEND (SP, 3);
970 PUSHMARK (SP);
971 PUSHs (&PL_sv_yes);
972 PUSHs (fullname);
973 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
974 PUTBACK;
975 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
976 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
977 SPAGAIN;
978 FREETMPS;
979 LEAVE;
980 PL_runops = runops_trace;
981 }
982
983 oldcxix = cxstack_ix;
984 }
985
986 if (cctx->flags & CC_TRACE_LINE)
987 {
988 dSP;
989
990 PL_runops = RUNOPS_DEFAULT;
991 ENTER;
992 SAVETMPS;
993 EXTEND (SP, 3);
994 PL_runops = RUNOPS_DEFAULT;
995 PUSHMARK (SP);
996 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
997 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
998 PUTBACK;
999 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1000 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1001 SPAGAIN;
1002 FREETMPS;
1003 LEAVE;
1004 PL_runops = runops_trace;
1005 }
1006 }
1007 }
1008 }
1009 }
1010
1011 TAINT_NOT;
1012 return 0;
1013}
1014
1015/* inject a fake call to Coro::State::_cctx_init into the execution */
1016/* _cctx_init should be careful, as it could be called at almost any time */
1017/* during execution of a perl program */
591static void NOINLINE 1018static void NOINLINE
592prepare_cctx (coro_stack *cctx) 1019cctx_prepare (pTHX_ coro_cctx *cctx)
593{ 1020{
594 dSP; 1021 dSP;
595 LOGOP myop; 1022 LOGOP myop;
596 1023
1024 PL_top_env = &PL_start_env;
1025
1026 if (cctx->flags & CC_TRACE)
1027 PL_runops = runops_trace;
1028
597 Zero (&myop, 1, LOGOP); 1029 Zero (&myop, 1, LOGOP);
598 myop.op_next = PL_op; 1030 myop.op_next = PL_op;
599 myop.op_flags = OPf_WANT_VOID; 1031 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
600
601 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602 1032
603 PUSHMARK (SP); 1033 PUSHMARK (SP);
1034 EXTEND (SP, 2);
1035 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
604 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 1036 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
605 PUTBACK; 1037 PUTBACK;
1038 PL_op = (OP *)&myop;
606 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1039 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607 SPAGAIN; 1040 SPAGAIN;
608} 1041}
609 1042
1043/*
1044 * this is a _very_ stripped down perl interpreter ;)
1045 */
610static void 1046static void
611coro_run (void *arg) 1047cctx_run (void *arg)
612{ 1048{
1049 dTHX;
1050
613 /* coro_run is the alternative epilogue of transfer() */ 1051 /* cctx_run is the alternative tail of transfer(), so unlock here. */
614 UNLOCK; 1052 UNLOCK;
615 1053
1054 /* we now skip the entersub that lead to transfer() */
1055 PL_op = PL_op->op_next;
1056
1057 /* inject a fake subroutine call to cctx_init */
1058 cctx_prepare (aTHX_ (coro_cctx *)arg);
1059
1060 /* somebody or something will hit me for both perl_run and PL_restartop */
1061 PL_restartop = PL_op;
1062 perl_run (PL_curinterp);
1063
616 /* 1064 /*
617 * this is a _very_ stripped down perl interpreter ;) 1065 * If perl-run returns we assume exit() was being called or the coro
1066 * fell off the end, which seems to be the only valid (non-bug)
1067 * reason for perl_run to return. We try to exit by jumping to the
1068 * bootstrap-time "top" top_env, as we cannot restore the "main"
1069 * coroutine as Coro has no such concept
618 */ 1070 */
619 PL_top_env = &PL_start_env; 1071 PL_top_env = main_top_env;
620 /* inject call to cctx_init */ 1072 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
621 prepare_cctx ((coro_stack *)arg);
622
623 /* somebody will hit me for both perl_run and PL_restartop */
624 perl_run (PL_curinterp);
625
626 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
627 abort ();
628} 1073}
629 1074
630static coro_stack * 1075static coro_cctx *
631stack_new () 1076cctx_new ()
632{ 1077{
633 coro_stack *stack; 1078 coro_cctx *cctx;
1079 void *stack_start;
1080 size_t stack_size;
634 1081
1082 ++cctx_count;
1083
635 New (0, stack, 1, coro_stack); 1084 Newz (0, cctx, 1, coro_cctx);
636 1085
637#if HAVE_MMAP 1086#if HAVE_MMAP
638
639 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1087 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640 /* mmap suppsedly does allocate-on-write for us */ 1088 /* mmap supposedly does allocate-on-write for us */
641 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1089 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642 1090
643 if (stack->sptr == (void *)-1) 1091 if (cctx->sptr != (void *)-1)
644 {
645 perror ("FATAL: unable to mmap stack for coroutine");
646 _exit (EXIT_FAILURE);
647 } 1092 {
648
649# if STACKGUARD 1093# if CORO_STACKGUARD
650 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1094 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
651# endif 1095# endif
652 1096 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
653#else 1097 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
654 1098 cctx->flags |= CC_MAPPED;
655 stack->ssize = STACKSIZE * (long)sizeof (long);
656 New (0, stack->sptr, STACKSIZE, long);
657
658 if (!stack->sptr)
659 { 1099 }
1100 else
1101#endif
1102 {
1103 cctx->ssize = coro_stacksize * (long)sizeof (long);
1104 New (0, cctx->sptr, coro_stacksize, long);
1105
1106 if (!cctx->sptr)
1107 {
660 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1108 perror ("FATAL: unable to allocate stack for coroutine");
661 _exit (EXIT_FAILURE); 1109 _exit (EXIT_FAILURE);
662 } 1110 }
663 1111
664#endif 1112 stack_start = cctx->sptr;
1113 stack_size = cctx->ssize;
1114 }
665 1115
666 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1116 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1117 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
667 1118
668 return stack; 1119 return cctx;
669} 1120}
670 1121
671static void 1122static void
672stack_free (coro_stack *stack) 1123cctx_destroy (coro_cctx *cctx)
673{ 1124{
674 if (!stack) 1125 if (!cctx)
675 return; 1126 return;
676 1127
1128 --cctx_count;
1129
1130#if CORO_USE_VALGRIND
1131 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1132#endif
1133
677#if HAVE_MMAP 1134#if HAVE_MMAP
1135 if (cctx->flags & CC_MAPPED)
678 munmap (stack->sptr, stack->ssize); 1136 munmap (cctx->sptr, cctx->ssize);
679#else 1137 else
1138#endif
680 Safefree (stack->sptr); 1139 Safefree (cctx->sptr);
681#endif
682 1140
683 Safefree (stack); 1141 Safefree (cctx);
684} 1142}
685 1143
686static coro_stack *stack_first; 1144/* wether this cctx should be destructed */
687static int cctx_count, cctx_idle; 1145#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
688 1146
689static coro_stack * 1147static coro_cctx *
690stack_get () 1148cctx_get (pTHX)
691{ 1149{
692 coro_stack *stack; 1150 while (expect_true (cctx_first))
693
694 if (stack_first)
695 { 1151 {
1152 coro_cctx *cctx = cctx_first;
1153 cctx_first = cctx->next;
696 --cctx_idle; 1154 --cctx_idle;
697 stack = stack_first; 1155
698 stack_first = stack->next; 1156 if (expect_true (!CCTX_EXPIRED (cctx)))
699 } 1157 return cctx;
700 else 1158
701 { 1159 cctx_destroy (cctx);
702 ++cctx_count;
703 stack = stack_new ();
704 PL_op = PL_op->op_next;
705 } 1160 }
706 1161
707 return stack; 1162 return cctx_new ();
708} 1163}
709 1164
710static void 1165static void
711stack_put (coro_stack *stack) 1166cctx_put (coro_cctx *cctx)
712{ 1167{
1168 /* free another cctx if overlimit */
1169 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1170 {
1171 coro_cctx *first = cctx_first;
1172 cctx_first = first->next;
1173 --cctx_idle;
1174
1175 cctx_destroy (first);
1176 }
1177
713 ++cctx_idle; 1178 ++cctx_idle;
714 stack->next = stack_first; 1179 cctx->next = cctx_first;
715 stack_first = stack; 1180 cctx_first = cctx;
716} 1181}
717 1182
718/* never call directly, always through the coro_state_transfer global variable */ 1183/** coroutine switching *****************************************************/
1184
1185static void
1186transfer_check (pTHX_ struct coro *prev, struct coro *next)
1187{
1188 if (expect_true (prev != next))
1189 {
1190 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1191 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1192
1193 if (expect_false (next->flags & CF_RUNNING))
1194 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1195
1196 if (expect_false (next->flags & CF_DESTROYED))
1197 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1198
1199#if !PERL_VERSION_ATLEAST (5,10,0)
1200 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1201 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1202#endif
1203 }
1204}
1205
1206/* always use the TRANSFER macro */
719static void NOINLINE 1207static void NOINLINE
720transfer (struct coro *prev, struct coro *next, int flags) 1208transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
721{ 1209{
722 dSTACKLEVEL; 1210 dSTACKLEVEL;
1211 static volatile int has_throw;
723 1212
724 /* sometimes transfer is only called to set idle_sp */ 1213 /* sometimes transfer is only called to set idle_sp */
725 if (flags == TRANSFER_SET_STACKLEVEL) 1214 if (expect_false (!next))
1215 {
726 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1216 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
727 else if (prev != next) 1217 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
728 { 1218 }
1219 else if (expect_true (prev != next))
1220 {
729 coro_stack *prev__stack; 1221 coro_cctx *prev__cctx;
1222
1223 if (expect_false (prev->flags & CF_NEW))
1224 {
1225 /* create a new empty context */
1226 Newz (0, prev->cctx, 1, coro_cctx);
1227 prev->flags &= ~CF_NEW;
1228 prev->flags |= CF_RUNNING;
1229 }
1230
1231 prev->flags &= ~CF_RUNNING;
1232 next->flags |= CF_RUNNING;
730 1233
731 LOCK; 1234 LOCK;
732 1235
733 if (next->mainstack) 1236 /* first get rid of the old state */
1237 save_perl (aTHX_ prev);
1238
1239 if (expect_false (next->flags & CF_NEW))
734 { 1240 {
735 /* coroutine already started */ 1241 /* need to start coroutine */
736 SAVE (prev, flags); 1242 next->flags &= ~CF_NEW;
737 LOAD (next); 1243 /* setup coroutine call */
1244 coro_setup (aTHX_ next);
738 } 1245 }
739 else 1246 else
1247 load_perl (aTHX_ next);
1248
1249 prev__cctx = prev->cctx;
1250
1251 /* possibly "free" the cctx */
1252 if (expect_true (
1253 prev__cctx->idle_sp == STACKLEVEL
1254 && !(prev__cctx->flags & CC_TRACE)
1255 && !force_cctx
1256 ))
740 { 1257 {
741 /* need to start coroutine */ 1258 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742 /* first get rid of the old state */ 1259 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
743 SAVE (prev, -1); 1260
744 /* setup coroutine call */ 1261 prev->cctx = 0;
745 setup_coro (next); 1262
746 /* need a stack */ 1263 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
747 next->stack = 0; 1264 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1265 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1266 if (!next->cctx)
1267 next->cctx = cctx_get (aTHX);
1268
1269 cctx_put (prev__cctx);
748 } 1270 }
749 1271
750 if (!prev->stack) 1272 ++next->usecount;
751 /* create a new empty context */
752 Newz (0, prev->stack, 1, coro_stack);
753 1273
754 prev__stack = prev->stack; 1274 if (expect_true (!next->cctx))
1275 next->cctx = cctx_get (aTHX);
755 1276
756 /* possibly "free" the stack */ 1277 has_throw = !!next->throw;
757 if (prev__stack->idle_sp == STACKLEVEL) 1278
1279 if (expect_false (prev__cctx != next->cctx))
758 { 1280 {
759 stack_put (prev__stack); 1281 prev__cctx->top_env = PL_top_env;
760 prev->stack = 0; 1282 PL_top_env = next->cctx->top_env;
1283 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
761 } 1284 }
762 1285
763 if (!next->stack) 1286 free_coro_mortal (aTHX);
764 next->stack = stack_get (); 1287 UNLOCK;
765 1288
766 if (prev__stack != next->stack) 1289 if (expect_false (has_throw))
767 { 1290 {
768 prev__stack->top_env = PL_top_env; 1291 struct coro *coro = SvSTATE (coro_current);
769 PL_top_env = next->stack->top_env; 1292
770 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1293 if (coro->throw)
1294 {
1295 SV *exception = coro->throw;
1296 coro->throw = 0;
1297 sv_setsv (ERRSV, exception);
1298 croak (0);
1299 }
771 } 1300 }
1301 }
1302}
772 1303
773 free_coro_mortal (); 1304struct transfer_args
1305{
1306 struct coro *prev, *next;
1307};
774 1308
1309#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1310#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1311
1312/** high level stuff ********************************************************/
1313
1314static int
1315coro_state_destroy (pTHX_ struct coro *coro)
1316{
1317 if (coro->flags & CF_DESTROYED)
1318 return 0;
1319
1320 coro->flags |= CF_DESTROYED;
1321
1322 if (coro->flags & CF_READY)
1323 {
1324 /* reduce nready, as destroying a ready coro effectively unreadies it */
1325 /* alternative: look through all ready queues and remove the coro */
1326 LOCK;
1327 --coro_nready;
775 UNLOCK; 1328 UNLOCK;
776 } 1329 }
777} 1330 else
778 1331 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
779struct transfer_args
780{
781 struct coro *prev, *next;
782 int flags;
783};
784
785#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
786
787static void
788coro_state_destroy (struct coro *coro)
789{
790 if (coro->refcnt--)
791 return;
792 1332
793 if (coro->mainstack && coro->mainstack != main_mainstack) 1333 if (coro->mainstack && coro->mainstack != main_mainstack)
794 { 1334 {
795 struct coro temp; 1335 struct coro temp;
796 1336
797 SAVE ((&temp), TRANSFER_SAVE_ALL); 1337 if (coro->flags & CF_RUNNING)
798 LOAD (coro); 1338 croak ("FATAL: tried to destroy currently running coroutine");
799 1339
800 coro_destroy_stacks (); 1340 save_perl (aTHX_ &temp);
1341 load_perl (aTHX_ coro);
801 1342
802 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1343 coro_destroy (aTHX_ coro);
803 1344
1345 load_perl (aTHX_ &temp);
1346
804 coro->mainstack = 0; 1347 coro->slot = 0;
805 } 1348 }
806 1349
807 stack_free (coro->stack); 1350 cctx_destroy (coro->cctx);
808 SvREFCNT_dec (coro->args); 1351 SvREFCNT_dec (coro->args);
809 Safefree (coro); 1352
1353 if (coro->next) coro->next->prev = coro->prev;
1354 if (coro->prev) coro->prev->next = coro->next;
1355 if (coro == coro_first) coro_first = coro->next;
1356
1357 return 1;
810} 1358}
811 1359
812static int 1360static int
813coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1361coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814{ 1362{
815 struct coro *coro = (struct coro *)mg->mg_ptr; 1363 struct coro *coro = (struct coro *)mg->mg_ptr;
816 mg->mg_ptr = 0; 1364 mg->mg_ptr = 0;
817 1365
1366 coro->hv = 0;
1367
1368 if (--coro->refcnt < 0)
1369 {
818 coro_state_destroy (coro); 1370 coro_state_destroy (aTHX_ coro);
1371 Safefree (coro);
1372 }
819 1373
820 return 0; 1374 return 0;
821} 1375}
822 1376
823static int 1377static int
… …
830 return 0; 1384 return 0;
831} 1385}
832 1386
833static MGVTBL coro_state_vtbl = { 1387static MGVTBL coro_state_vtbl = {
834 0, 0, 0, 0, 1388 0, 0, 0, 0,
835 coro_state_clear, 1389 coro_state_free,
836 0, 1390 0,
837#ifdef MGf_DUP 1391#ifdef MGf_DUP
838 coro_state_dup, 1392 coro_state_dup,
839#else 1393#else
840# define MGf_DUP 0 1394# define MGf_DUP 0
841#endif 1395#endif
842}; 1396};
843 1397
844static struct coro *
845SvSTATE (SV *coro)
846{
847 HV *stash;
848 MAGIC *mg;
849
850 if (SvROK (coro))
851 coro = SvRV (coro);
852
853 stash = SvSTASH (coro);
854 if (stash != coro_stash && stash != coro_state_stash)
855 {
856 /* very slow, but rare, check */
857 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
858 croak ("Coro::State object required");
859 }
860
861 mg = SvMAGIC (coro);
862 assert (mg->mg_type == PERL_MAGIC_ext);
863 return (struct coro *)mg->mg_ptr;
864}
865
866static void 1398static void
867prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1399prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
868{ 1400{
869 ta->prev = SvSTATE (prev); 1401 ta->prev = SvSTATE (prev_sv);
870 ta->next = SvSTATE (next); 1402 ta->next = SvSTATE (next_sv);
871 ta->flags = flags; 1403 TRANSFER_CHECK (*ta);
872} 1404}
873 1405
874static void 1406static void
875api_transfer (SV *prev, SV *next, int flags) 1407api_transfer (SV *prev_sv, SV *next_sv)
876{ 1408{
877 dTHX; 1409 dTHX;
878 struct transfer_args ta; 1410 struct transfer_args ta;
879 1411
880 prepare_transfer (&ta, prev, next, flags); 1412 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881 TRANSFER (ta); 1413 TRANSFER (ta, 1);
882} 1414}
883 1415
884/** Coro ********************************************************************/ 1416/** Coro ********************************************************************/
885 1417
886#define PRIO_MAX 3
887#define PRIO_HIGH 1
888#define PRIO_NORMAL 0
889#define PRIO_LOW -1
890#define PRIO_IDLE -3
891#define PRIO_MIN -4
892
893/* for Coro.pm */
894static GV *coro_current, *coro_idle;
895static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896static int coro_nready;
897
898static void 1418static void
899coro_enq (SV *sv) 1419coro_enq (pTHX_ SV *coro_sv)
1420{
1421 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1422}
1423
1424static SV *
1425coro_deq (pTHX)
900{ 1426{
901 int prio; 1427 int prio;
902 1428
903 if (SvTYPE (sv) != SVt_PVHV)
904 croak ("Coro::ready tried to enqueue something that is not a coroutine");
905
906 prio = SvSTATE (sv)->prio;
907
908 av_push (coro_ready [prio - PRIO_MIN], sv);
909 coro_nready++;
910}
911
912static SV *
913coro_deq (int min_prio)
914{
915 int prio = PRIO_MAX - PRIO_MIN;
916
917 min_prio -= PRIO_MIN;
918 if (min_prio < 0)
919 min_prio = 0;
920
921 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1429 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
922 if (AvFILLp (coro_ready [prio]) >= 0) 1430 if (AvFILLp (coro_ready [prio]) >= 0)
923 {
924 coro_nready--;
925 return av_shift (coro_ready [prio]); 1431 return av_shift (coro_ready [prio]);
926 }
927 1432
928 return 0; 1433 return 0;
929} 1434}
930 1435
1436static int
1437api_ready (SV *coro_sv)
1438{
1439 dTHX;
1440 struct coro *coro;
1441 SV *sv_hook;
1442 void (*xs_hook)(void);
1443
1444 if (SvROK (coro_sv))
1445 coro_sv = SvRV (coro_sv);
1446
1447 coro = SvSTATE (coro_sv);
1448
1449 if (coro->flags & CF_READY)
1450 return 0;
1451
1452 coro->flags |= CF_READY;
1453
1454 LOCK;
1455
1456 sv_hook = coro_nready ? 0 : coro_readyhook;
1457 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1458
1459 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1460 ++coro_nready;
1461
1462 UNLOCK;
1463
1464 if (sv_hook)
1465 {
1466 dSP;
1467
1468 ENTER;
1469 SAVETMPS;
1470
1471 PUSHMARK (SP);
1472 PUTBACK;
1473 call_sv (sv_hook, G_DISCARD);
1474 SPAGAIN;
1475
1476 FREETMPS;
1477 LEAVE;
1478 }
1479
1480 if (xs_hook)
1481 xs_hook ();
1482
1483 return 1;
1484}
1485
1486static int
1487api_is_ready (SV *coro_sv)
1488{
1489 dTHX;
1490 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1491}
1492
931static void 1493static void
932api_ready (SV *coro) 1494prepare_schedule (pTHX_ struct transfer_args *ta)
933{ 1495{
934 dTHX; 1496 SV *prev_sv, *next_sv;
935 1497
936 if (SvROK (coro)) 1498 for (;;)
937 coro = SvRV (coro); 1499 {
1500 LOCK;
1501 next_sv = coro_deq (aTHX);
1502
1503 /* nothing to schedule: call the idle handler */
1504 if (expect_false (!next_sv))
1505 {
1506 dSP;
1507 UNLOCK;
1508
1509 ENTER;
1510 SAVETMPS;
1511
1512 PUSHMARK (SP);
1513 PUTBACK;
1514 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1515 SPAGAIN;
1516
1517 FREETMPS;
1518 LEAVE;
1519 continue;
1520 }
1521
1522 ta->next = SvSTATE (next_sv);
1523
1524 /* cannot transfer to destroyed coros, skip and look for next */
1525 if (expect_false (ta->next->flags & CF_DESTROYED))
1526 {
1527 UNLOCK;
1528 SvREFCNT_dec (next_sv);
1529 /* coro_nready is already taken care of by destroy */
1530 continue;
1531 }
1532
1533 --coro_nready;
1534 UNLOCK;
1535 break;
1536 }
1537
1538 /* free this only after the transfer */
1539 prev_sv = SvRV (coro_current);
1540 ta->prev = SvSTATE (prev_sv);
1541 TRANSFER_CHECK (*ta);
1542 assert (ta->next->flags & CF_READY);
1543 ta->next->flags &= ~CF_READY;
1544 SvRV_set (coro_current, next_sv);
938 1545
939 LOCK; 1546 LOCK;
940 coro_enq (SvREFCNT_inc (coro)); 1547 free_coro_mortal (aTHX);
1548 coro_mortal = prev_sv;
941 UNLOCK; 1549 UNLOCK;
942} 1550}
943 1551
944static void 1552static void
945prepare_schedule (struct transfer_args *ta)
946{
947 SV *current, *prev, *next;
948
949 current = GvSV (coro_current);
950
951 for (;;)
952 {
953 LOCK;
954 next = coro_deq (PRIO_MIN);
955 UNLOCK;
956
957 if (next)
958 break;
959
960 {
961 dSP;
962
963 ENTER;
964 SAVETMPS;
965
966 PUSHMARK (SP);
967 PUTBACK;
968 call_sv (GvSV (coro_idle), G_DISCARD);
969
970 FREETMPS;
971 LEAVE;
972 }
973 }
974
975 prev = SvRV (current);
976 SvRV (current) = next;
977
978 /* free this only after the transfer */
979 LOCK;
980 free_coro_mortal ();
981 UNLOCK;
982 coro_mortal = prev;
983
984 ta->prev = SvSTATE (prev);
985 ta->next = SvSTATE (next);
986 ta->flags = TRANSFER_SAVE_ALL;
987}
988
989static void
990prepare_cede (struct transfer_args *ta) 1553prepare_cede (pTHX_ struct transfer_args *ta)
991{ 1554{
992 LOCK; 1555 api_ready (coro_current);
993 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994 UNLOCK;
995
996 prepare_schedule (ta); 1556 prepare_schedule (aTHX_ ta);
1557}
1558
1559static int
1560prepare_cede_notself (pTHX_ struct transfer_args *ta)
1561{
1562 if (coro_nready)
1563 {
1564 SV *prev = SvRV (coro_current);
1565 prepare_schedule (aTHX_ ta);
1566 api_ready (prev);
1567 return 1;
1568 }
1569 else
1570 return 0;
997} 1571}
998 1572
999static void 1573static void
1000api_schedule (void) 1574api_schedule (void)
1001{ 1575{
1002 dTHX; 1576 dTHX;
1003 struct transfer_args ta; 1577 struct transfer_args ta;
1004 1578
1005 prepare_schedule (&ta); 1579 prepare_schedule (aTHX_ &ta);
1006 TRANSFER (ta); 1580 TRANSFER (ta, 1);
1007} 1581}
1008 1582
1009static void 1583static int
1010api_cede (void) 1584api_cede (void)
1011{ 1585{
1012 dTHX; 1586 dTHX;
1013 struct transfer_args ta; 1587 struct transfer_args ta;
1014 1588
1015 prepare_cede (&ta); 1589 prepare_cede (aTHX_ &ta);
1590
1591 if (expect_true (ta.prev != ta.next))
1592 {
1016 TRANSFER (ta); 1593 TRANSFER (ta, 1);
1594 return 1;
1595 }
1596 else
1597 return 0;
1017} 1598}
1018 1599
1600static int
1601api_cede_notself (void)
1602{
1603 dTHX;
1604 struct transfer_args ta;
1605
1606 if (prepare_cede_notself (aTHX_ &ta))
1607 {
1608 TRANSFER (ta, 1);
1609 return 1;
1610 }
1611 else
1612 return 0;
1613}
1614
1615static void
1616api_trace (SV *coro_sv, int flags)
1617{
1618 dTHX;
1619 struct coro *coro = SvSTATE (coro_sv);
1620
1621 if (flags & CC_TRACE)
1622 {
1623 if (!coro->cctx)
1624 coro->cctx = cctx_new ();
1625 else if (!(coro->cctx->flags & CC_TRACE))
1626 croak ("cannot enable tracing on coroutine with custom stack");
1627
1628 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1629 }
1630 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1631 {
1632 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1633
1634 if (coro->flags & CF_RUNNING)
1635 PL_runops = RUNOPS_DEFAULT;
1636 else
1637 coro->slot->runops = RUNOPS_DEFAULT;
1638 }
1639}
1640
1641static int
1642coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1643{
1644 AV *padlist;
1645 AV *av = (AV *)mg->mg_obj;
1646
1647 abort ();
1648
1649 return 0;
1650}
1651
1652static MGVTBL coro_gensub_vtbl = {
1653 0, 0, 0, 0,
1654 coro_gensub_free
1655};
1656
1657/*****************************************************************************/
1658/* PerlIO::cede */
1659
1660typedef struct
1661{
1662 PerlIOBuf base;
1663 NV next, every;
1664} PerlIOCede;
1665
1666static IV
1667PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1668{
1669 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1670
1671 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1672 self->next = nvtime () + self->every;
1673
1674 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1675}
1676
1677static SV *
1678PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1679{
1680 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1681
1682 return newSVnv (self->every);
1683}
1684
1685static IV
1686PerlIOCede_flush (pTHX_ PerlIO *f)
1687{
1688 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1689 double now = nvtime ();
1690
1691 if (now >= self->next)
1692 {
1693 api_cede ();
1694 self->next = now + self->every;
1695 }
1696
1697 return PerlIOBuf_flush (aTHX_ f);
1698}
1699
1700static PerlIO_funcs PerlIO_cede =
1701{
1702 sizeof(PerlIO_funcs),
1703 "cede",
1704 sizeof(PerlIOCede),
1705 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1706 PerlIOCede_pushed,
1707 PerlIOBuf_popped,
1708 PerlIOBuf_open,
1709 PerlIOBase_binmode,
1710 PerlIOCede_getarg,
1711 PerlIOBase_fileno,
1712 PerlIOBuf_dup,
1713 PerlIOBuf_read,
1714 PerlIOBuf_unread,
1715 PerlIOBuf_write,
1716 PerlIOBuf_seek,
1717 PerlIOBuf_tell,
1718 PerlIOBuf_close,
1719 PerlIOCede_flush,
1720 PerlIOBuf_fill,
1721 PerlIOBase_eof,
1722 PerlIOBase_error,
1723 PerlIOBase_clearerr,
1724 PerlIOBase_setlinebuf,
1725 PerlIOBuf_get_base,
1726 PerlIOBuf_bufsiz,
1727 PerlIOBuf_get_ptr,
1728 PerlIOBuf_get_cnt,
1729 PerlIOBuf_set_ptrcnt,
1730};
1731
1732
1019MODULE = Coro::State PACKAGE = Coro::State 1733MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1020 1734
1021PROTOTYPES: DISABLE 1735PROTOTYPES: DISABLE
1022 1736
1023BOOT: 1737BOOT:
1024{ 1738{
1025#ifdef USE_ITHREADS 1739#ifdef USE_ITHREADS
1026 MUTEX_INIT (&coro_mutex); 1740 MUTEX_INIT (&coro_mutex);
1027#endif 1741#endif
1028 BOOT_PAGESIZE; 1742 BOOT_PAGESIZE;
1029 1743
1744 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1745 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1746
1747 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1748 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1749 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1750
1751 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1752 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1753 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1754
1030 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1755 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031 1756
1032 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1757 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1033 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1758 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1034 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1759 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1760 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1035 1761
1036 main_mainstack = PL_mainstack; 1762 main_mainstack = PL_mainstack;
1763 main_top_env = PL_top_env;
1037 1764
1765 while (main_top_env->je_prev)
1766 main_top_env = main_top_env->je_prev;
1767
1038 coroapi.ver = CORO_API_VERSION; 1768 coroapi.ver = CORO_API_VERSION;
1769 coroapi.rev = CORO_API_REVISION;
1039 coroapi.transfer = api_transfer; 1770 coroapi.transfer = api_transfer;
1771
1772 {
1773 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1774
1775 if (!svp) croak ("Time::HiRes is required");
1776 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1777
1778 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1779 }
1040 1780
1041 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1781 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1042} 1782}
1043 1783
1044SV * 1784SV *
1045new (char *klass, ...) 1785new (char *klass, ...)
1046 CODE: 1786 CODE:
1047{ 1787{
1048 struct coro *coro; 1788 struct coro *coro;
1789 MAGIC *mg;
1049 HV *hv; 1790 HV *hv;
1050 int i; 1791 int i;
1051 1792
1052 Newz (0, coro, 1, struct coro); 1793 Newz (0, coro, 1, struct coro);
1053 coro->args = newAV (); 1794 coro->args = newAV ();
1795 coro->flags = CF_NEW;
1054 1796
1797 if (coro_first) coro_first->prev = coro;
1798 coro->next = coro_first;
1799 coro_first = coro;
1800
1055 hv = newHV (); 1801 coro->hv = hv = newHV ();
1056 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1802 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1803 mg->mg_flags |= MGf_DUP;
1057 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1804 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058 1805
1806 av_extend (coro->args, items - 1);
1059 for (i = 1; i < items; i++) 1807 for (i = 1; i < items; i++)
1060 av_push (coro->args, newSVsv (ST (i))); 1808 av_push (coro->args, newSVsv (ST (i)));
1061
1062 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1063 /*coro->stack = 0;*/
1064} 1809}
1065 OUTPUT: 1810 OUTPUT:
1066 RETVAL 1811 RETVAL
1067 1812
1813# these not obviously related functions are all rolled into the same xs
1814# function to increase chances that they all will call transfer with the same
1815# stack offset
1068void 1816void
1069_set_stacklevel (...) 1817_set_stacklevel (...)
1070 ALIAS: 1818 ALIAS:
1071 Coro::State::transfer = 1 1819 Coro::State::transfer = 1
1072 Coro::schedule = 2 1820 Coro::schedule = 2
1073 Coro::cede = 3 1821 Coro::cede = 3
1074 Coro::Cont::yield = 4 1822 Coro::cede_notself = 4
1075 CODE: 1823 CODE:
1076{ 1824{
1077 struct transfer_args ta; 1825 struct transfer_args ta;
1078 1826
1827 PUTBACK;
1079 switch (ix) 1828 switch (ix)
1080 { 1829 {
1081 case 0: 1830 case 0:
1082 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1831 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1083 ta.next = 0; 1832 ta.next = 0;
1084 ta.flags = TRANSFER_SET_STACKLEVEL;
1085 break; 1833 break;
1086 1834
1087 case 1: 1835 case 1:
1088 if (items != 3) 1836 if (items != 2)
1089 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1837 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1090 1838
1091 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1839 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1092 break; 1840 break;
1093 1841
1094 case 2: 1842 case 2:
1095 prepare_schedule (&ta); 1843 prepare_schedule (aTHX_ &ta);
1096 break; 1844 break;
1097 1845
1098 case 3: 1846 case 3:
1099 prepare_cede (&ta); 1847 prepare_cede (aTHX_ &ta);
1100 break; 1848 break;
1101 1849
1102 case 4: 1850 case 4:
1103 { 1851 if (!prepare_cede_notself (aTHX_ &ta))
1104 SV *yieldstack; 1852 XSRETURN_EMPTY;
1105 SV *sv;
1106 AV *defav = GvAV (PL_defgv);
1107 1853
1108 yieldstack = *hv_fetch (
1109 (HV *)SvRV (GvSV (coro_current)),
1110 "yieldstack", sizeof ("yieldstack") - 1,
1111 0
1112 );
1113
1114 /* set up @_ -- ugly */
1115 av_clear (defav);
1116 av_fill (defav, items - 1);
1117 while (items--)
1118 av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120 sv = av_pop ((AV *)SvRV (yieldstack));
1121 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123 ta.flags = 0;
1124 SvREFCNT_dec (sv);
1125 }
1126 break; 1854 break;
1127
1128 } 1855 }
1856 SPAGAIN;
1129 1857
1858 BARRIER;
1859 PUTBACK;
1130 TRANSFER (ta); 1860 TRANSFER (ta, 0);
1861 SPAGAIN; /* might be the sp of a different coroutine now */
1862 /* be extra careful not to ever do anything after TRANSFER */
1131} 1863}
1864
1865bool
1866_destroy (SV *coro_sv)
1867 CODE:
1868 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1869 OUTPUT:
1870 RETVAL
1132 1871
1133void 1872void
1134_clone_state_from (SV *dst, SV *src)
1135 CODE:
1136{
1137 struct coro *coro_src = SvSTATE (src);
1138
1139 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1140
1141 ++coro_src->refcnt;
1142 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1143}
1144
1145void
1146_exit (code) 1873_exit (int code)
1147 int code
1148 PROTOTYPE: $ 1874 PROTOTYPE: $
1149 CODE: 1875 CODE:
1150 _exit (code); 1876 _exit (code);
1151 1877
1878int
1879cctx_stacksize (int new_stacksize = 0)
1880 CODE:
1881 RETVAL = coro_stacksize;
1882 if (new_stacksize)
1883 coro_stacksize = new_stacksize;
1884 OUTPUT:
1885 RETVAL
1886
1887int
1888cctx_count ()
1889 CODE:
1890 RETVAL = cctx_count;
1891 OUTPUT:
1892 RETVAL
1893
1894int
1895cctx_idle ()
1896 CODE:
1897 RETVAL = cctx_idle;
1898 OUTPUT:
1899 RETVAL
1900
1901void
1902list ()
1903 PPCODE:
1904{
1905 struct coro *coro;
1906 for (coro = coro_first; coro; coro = coro->next)
1907 if (coro->hv)
1908 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1909}
1910
1911void
1912call (Coro::State coro, SV *coderef)
1913 ALIAS:
1914 eval = 1
1915 CODE:
1916{
1917 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1918 {
1919 struct coro temp;
1920
1921 if (!(coro->flags & CF_RUNNING))
1922 {
1923 PUTBACK;
1924 save_perl (aTHX_ &temp);
1925 load_perl (aTHX_ coro);
1926 }
1927
1928 {
1929 dSP;
1930 ENTER;
1931 SAVETMPS;
1932 PUTBACK;
1933 PUSHSTACK;
1934 PUSHMARK (SP);
1935
1936 if (ix)
1937 eval_sv (coderef, 0);
1938 else
1939 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1940
1941 POPSTACK;
1942 SPAGAIN;
1943 FREETMPS;
1944 LEAVE;
1945 PUTBACK;
1946 }
1947
1948 if (!(coro->flags & CF_RUNNING))
1949 {
1950 save_perl (aTHX_ coro);
1951 load_perl (aTHX_ &temp);
1952 SPAGAIN;
1953 }
1954 }
1955}
1956
1957SV *
1958is_ready (Coro::State coro)
1959 PROTOTYPE: $
1960 ALIAS:
1961 is_ready = CF_READY
1962 is_running = CF_RUNNING
1963 is_new = CF_NEW
1964 is_destroyed = CF_DESTROYED
1965 CODE:
1966 RETVAL = boolSV (coro->flags & ix);
1967 OUTPUT:
1968 RETVAL
1969
1970void
1971api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1972
1973SV *
1974has_cctx (Coro::State coro)
1975 PROTOTYPE: $
1976 CODE:
1977 RETVAL = boolSV (!!coro->cctx);
1978 OUTPUT:
1979 RETVAL
1980
1981int
1982is_traced (Coro::State coro)
1983 PROTOTYPE: $
1984 CODE:
1985 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1986 OUTPUT:
1987 RETVAL
1988
1989IV
1990rss (Coro::State coro)
1991 PROTOTYPE: $
1992 ALIAS:
1993 usecount = 1
1994 CODE:
1995 switch (ix)
1996 {
1997 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1998 case 1: RETVAL = coro->usecount; break;
1999 }
2000 OUTPUT:
2001 RETVAL
2002
2003void
2004force_cctx ()
2005 CODE:
2006 struct coro *coro = SvSTATE (coro_current);
2007 coro->cctx->idle_sp = 0;
2008
2009void
2010throw (Coro::State self, SV *throw = &PL_sv_undef)
2011 PROTOTYPE: $;$
2012 CODE:
2013 SvREFCNT_dec (self->throw);
2014 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2015
2016void
2017swap_defsv (Coro::State self)
2018 PROTOTYPE: $
2019 ALIAS:
2020 swap_defav = 1
2021 CODE:
2022 if (!self->slot)
2023 croak ("cannot swap state with coroutine that has no saved state");
2024 else
2025 {
2026 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2027 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2028
2029 SV *tmp = *src; *src = *dst; *dst = tmp;
2030 }
2031
1152MODULE = Coro::State PACKAGE = Coro 2032MODULE = Coro::State PACKAGE = Coro
1153 2033
1154BOOT: 2034BOOT:
1155{ 2035{
1156 int i; 2036 int i;
1157 2037
2038 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2039 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2040 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2041
2042 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2043 SvREADONLY_on (coro_current);
2044
1158 coro_stash = gv_stashpv ("Coro", TRUE); 2045 coro_stash = gv_stashpv ("Coro", TRUE);
1159 2046
1160 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2047 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1161 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2048 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1162 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2049 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1163 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2050 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1164 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2051 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1165 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2052 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1166 2053
1167 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1168 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1169
1170 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2054 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171 coro_ready[i] = newAV (); 2055 coro_ready[i] = newAV ();
1172 2056
1173 { 2057 {
1174 SV *sv = perl_get_sv("Coro::API", 1); 2058 SV *sv = perl_get_sv ("Coro::API", TRUE);
2059 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1175 2060
1176 coroapi.schedule = api_schedule; 2061 coroapi.schedule = api_schedule;
1177 coroapi.cede = api_cede; 2062 coroapi.cede = api_cede;
2063 coroapi.cede_notself = api_cede_notself;
1178 coroapi.ready = api_ready; 2064 coroapi.ready = api_ready;
2065 coroapi.is_ready = api_is_ready;
1179 coroapi.nready = &coro_nready; 2066 coroapi.nready = &coro_nready;
1180 coroapi.current = coro_current; 2067 coroapi.current = coro_current;
1181 2068
1182 GCoroAPI = &coroapi; 2069 GCoroAPI = &coroapi;
1183 sv_setiv (sv, (IV)&coroapi); 2070 sv_setiv (sv, (IV)&coroapi);
1184 SvREADONLY_on (sv); 2071 SvREADONLY_on (sv);
1185 } 2072 }
1186} 2073}
2074
2075void
2076_set_current (SV *current)
2077 PROTOTYPE: $
2078 CODE:
2079 SvREFCNT_dec (SvRV (coro_current));
2080 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2081
2082void
2083_set_readyhook (SV *hook)
2084 PROTOTYPE: $
2085 CODE:
2086 LOCK;
2087 SvREFCNT_dec (coro_readyhook);
2088 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2089 UNLOCK;
1187 2090
1188int 2091int
1189prio (Coro::State coro, int newprio = 0) 2092prio (Coro::State coro, int newprio = 0)
1190 ALIAS: 2093 ALIAS:
1191 nice = 1 2094 nice = 1
… …
1194 RETVAL = coro->prio; 2097 RETVAL = coro->prio;
1195 2098
1196 if (items > 1) 2099 if (items > 1)
1197 { 2100 {
1198 if (ix) 2101 if (ix)
1199 newprio += coro->prio; 2102 newprio = coro->prio - newprio;
1200 2103
1201 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2104 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1202 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2105 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1203 2106
1204 coro->prio = newprio; 2107 coro->prio = newprio;
1205 } 2108 }
1206} 2109}
2110 OUTPUT:
2111 RETVAL
1207 2112
1208void 2113SV *
1209ready (SV *self) 2114ready (SV *self)
1210 PROTOTYPE: $ 2115 PROTOTYPE: $
1211 CODE: 2116 CODE:
1212 api_ready (self); 2117 RETVAL = boolSV (api_ready (self));
2118 OUTPUT:
2119 RETVAL
1213 2120
1214int 2121int
1215nready (...) 2122nready (...)
1216 PROTOTYPE: 2123 PROTOTYPE:
1217 CODE: 2124 CODE:
1218 RETVAL = coro_nready; 2125 RETVAL = coro_nready;
1219 OUTPUT: 2126 OUTPUT:
1220 RETVAL 2127 RETVAL
1221 2128
1222MODULE = Coro::State PACKAGE = Coro::AIO 2129# for async_pool speedup
2130void
2131_pool_1 (SV *cb)
2132 CODE:
2133{
2134 struct coro *coro = SvSTATE (coro_current);
2135 HV *hv = (HV *)SvRV (coro_current);
2136 AV *defav = GvAV (PL_defgv);
2137 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2138 AV *invoke_av;
2139 int i, len;
2140
2141 if (!invoke)
2142 {
2143 SV *old = PL_diehook;
2144 PL_diehook = 0;
2145 SvREFCNT_dec (old);
2146 croak ("\3async_pool terminate\2\n");
2147 }
2148
2149 SvREFCNT_dec (coro->saved_deffh);
2150 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2151
2152 hv_store (hv, "desc", sizeof ("desc") - 1,
2153 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2154
2155 invoke_av = (AV *)SvRV (invoke);
2156 len = av_len (invoke_av);
2157
2158 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2159
2160 if (len > 0)
2161 {
2162 av_fill (defav, len - 1);
2163 for (i = 0; i < len; ++i)
2164 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2165 }
2166
2167 SvREFCNT_dec (invoke);
2168}
2169
2170void
2171_pool_2 (SV *cb)
2172 CODE:
2173{
2174 struct coro *coro = SvSTATE (coro_current);
2175
2176 sv_setsv (cb, &PL_sv_undef);
2177
2178 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2179 coro->saved_deffh = 0;
2180
2181 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2182 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2183 {
2184 SV *old = PL_diehook;
2185 PL_diehook = 0;
2186 SvREFCNT_dec (old);
2187 croak ("\3async_pool terminate\2\n");
2188 }
2189
2190 av_clear (GvAV (PL_defgv));
2191 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2192 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2193
2194 coro->prio = 0;
2195
2196 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2197 api_trace (coro_current, 0);
2198
2199 av_push (av_async_pool, newSVsv (coro_current));
2200}
2201
2202#if 0
2203
2204void
2205_generator_call (...)
2206 PROTOTYPE: @
2207 PPCODE:
2208 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2209 xxxx
2210 abort ();
1223 2211
1224SV * 2212SV *
1225_get_state () 2213gensub (SV *sub, ...)
1226 CODE: 2214 PROTOTYPE: &;@
2215 CODE:
1227{ 2216{
1228 struct { 2217 struct coro *coro;
1229 int errorno; 2218 MAGIC *mg;
1230 int laststype; 2219 CV *xcv;
1231 int laststatval; 2220 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1232 Stat_t statcache; 2221 int i;
1233 } data;
1234 2222
1235 data.errorno = errno; 2223 CvGV (ncv) = CvGV (cv);
1236 data.laststype = PL_laststype; 2224 CvFILE (ncv) = CvFILE (cv);
1237 data.laststatval = PL_laststatval;
1238 data.statcache = PL_statcache;
1239 2225
1240 RETVAL = newSVpvn ((char *)&data, sizeof data); 2226 Newz (0, coro, 1, struct coro);
2227 coro->args = newAV ();
2228 coro->flags = CF_NEW;
2229
2230 av_extend (coro->args, items - 1);
2231 for (i = 1; i < items; i++)
2232 av_push (coro->args, newSVsv (ST (i)));
2233
2234 CvISXSUB_on (ncv);
2235 CvXSUBANY (ncv).any_ptr = (void *)coro;
2236
2237 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2238
2239 CvXSUB (ncv) = CvXSUB (xcv);
2240 CvANON_on (ncv);
2241
2242 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2243 RETVAL = newRV_noinc ((SV *)ncv);
1241} 2244}
1242 OUTPUT: 2245 OUTPUT:
1243 RETVAL 2246 RETVAL
1244 2247
2248#endif
2249
2250
2251MODULE = Coro::State PACKAGE = Coro::AIO
2252
1245void 2253void
1246_set_state (char *data_) 2254_get_state (SV *self)
2255 PPCODE:
2256{
2257 AV *defav = GvAV (PL_defgv);
2258 AV *av = newAV ();
2259 int i;
2260 SV *data_sv = newSV (sizeof (struct io_state));
2261 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2262 SvCUR_set (data_sv, sizeof (struct io_state));
2263 SvPOK_only (data_sv);
2264
2265 data->errorno = errno;
2266 data->laststype = PL_laststype;
2267 data->laststatval = PL_laststatval;
2268 data->statcache = PL_statcache;
2269
2270 av_extend (av, AvFILLp (defav) + 1 + 1);
2271
2272 for (i = 0; i <= AvFILLp (defav); ++i)
2273 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2274
2275 av_push (av, data_sv);
2276
2277 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2278
2279 api_ready (self);
2280}
2281
2282void
2283_set_state (SV *state)
1247 PROTOTYPE: $ 2284 PROTOTYPE: $
2285 PPCODE:
2286{
2287 AV *av = (AV *)SvRV (state);
2288 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2289 int i;
2290
2291 errno = data->errorno;
2292 PL_laststype = data->laststype;
2293 PL_laststatval = data->laststatval;
2294 PL_statcache = data->statcache;
2295
2296 EXTEND (SP, AvFILLp (av));
2297 for (i = 0; i < AvFILLp (av); ++i)
2298 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2299}
2300
2301
2302MODULE = Coro::State PACKAGE = Coro::AnyEvent
2303
2304BOOT:
2305 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2306
2307SV *
2308_schedule (...)
2309 PROTOTYPE: @
1248 CODE: 2310 CODE:
1249{ 2311{
1250 struct { 2312 static int incede;
1251 int errorno;
1252 int laststype;
1253 int laststatval;
1254 Stat_t statcache;
1255 } *data = (void *)data_;
1256 2313
1257 errno = data->errorno; 2314 api_cede_notself ();
1258 PL_laststype = data->laststype; 2315
1259 PL_laststatval = data->laststatval; 2316 ++incede;
1260 PL_statcache = data->statcache; 2317 while (coro_nready >= incede && api_cede ())
2318 ;
2319
2320 sv_setsv (sv_activity, &PL_sv_undef);
2321 if (coro_nready >= incede)
2322 {
2323 PUSHMARK (SP);
2324 PUTBACK;
2325 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2326 SPAGAIN;
2327 }
2328
2329 --incede;
1261} 2330}
2331
2332
2333MODULE = Coro::State PACKAGE = PerlIO::cede
2334
2335BOOT:
2336 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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