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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 1.246 by root, Wed Sep 24 21:20:05 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
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
38 103
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40# undef STACKGUARD 105# 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 106#endif
57# include <limits.h> 107
58# ifndef PAGESIZE 108#ifndef CORO_STACKGUARD
59# define PAGESIZE pagesize 109# define CORO_STACKGUARD 0
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61static long pagesize;
62# else
63# define BOOT_PAGESIZE
64# endif 110#endif
65#endif
66 111
67/* The next macro should declare a variable stacklevel that contains and approximation 112/* prefer perl internal functions over our own? */
68 * to the current C stack pointer. Its property is that it changes with each call 113#ifndef CORO_PREFER_PERL_FUNCTIONS
69 * 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. */
70#define dSTACKLEVEL int stacklevel 119#define dSTACKLEVEL volatile char stacklevel
71#define STACKLEVEL ((void *)&stacklevel) 120#define STACKLEVEL ((void *)&stacklevel)
72 121
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 122#define IN_DESTRUCT (PL_main_cv == Nullcv)
74 123
75#if __GNUC__ >= 3 124#if __GNUC__ >= 3
76# 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))
77#else 128#else
78# define attribute(x) 129# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr)
79#endif 132#endif
133
134#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1)
80 136
81#define NOINLINE attribute ((noinline)) 137#define NOINLINE attribute ((noinline))
82 138
83#include "CoroAPI.h" 139#include "CoroAPI.h"
84
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86 140
87#ifdef USE_ITHREADS 141#ifdef USE_ITHREADS
88static perl_mutex coro_mutex; 142static perl_mutex coro_mutex;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91#else 145#else
92# define LOCK (void)0 146# define LOCK (void)0
93# define UNLOCK (void)0 147# define UNLOCK (void)0
94#endif 148#endif
95 149
150/* helper storage struct for Coro::AIO */
151struct io_state
152{
153 int errorno;
154 I32 laststype;
155 int laststatval;
156 Stat_t statcache;
157};
158
159static double (*nvtime)(); /* so why doesn't it take void? */
160
161static size_t coro_stacksize = CORO_STACKSIZE;
96static struct CoroAPI coroapi; 162static struct CoroAPI coroapi;
97static AV *main_mainstack; /* used to differentiate between $main and others */ 163static AV *main_mainstack; /* used to differentiate between $main and others */
164static JMPENV *main_top_env;
98static HV *coro_state_stash, *coro_stash; 165static HV *coro_state_stash, *coro_stash;
99static SV *coro_mortal; /* will be freed after next transfer */ 166static volatile SV *coro_mortal; /* will be freed after next transfer */
167
168static GV *irsgv; /* $/ */
169static GV *stdoutgv; /* *STDOUT */
170static SV *rv_diehook;
171static SV *rv_warnhook;
172static HV *hv_sig; /* %SIG */
173
174/* async_pool helper stuff */
175static SV *sv_pool_rss;
176static SV *sv_pool_size;
177static AV *av_async_pool;
178
179/* Coro::AnyEvent */
180static SV *sv_activity;
181
182static struct coro_cctx *cctx_first;
183static int cctx_count, cctx_idle;
184
185enum {
186 CC_MAPPED = 0x01,
187 CC_NOREUSE = 0x02, /* throw this away after tracing */
188 CC_TRACE = 0x04,
189 CC_TRACE_SUB = 0x08, /* trace sub calls */
190 CC_TRACE_LINE = 0x10, /* trace each statement */
191 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
192};
100 193
101/* this is a structure representing a c-level coroutine */ 194/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 195typedef struct coro_cctx {
103 struct coro_stack *next; 196 struct coro_cctx *next;
104 197
105 /* the stack */ 198 /* the stack */
106 void *sptr; 199 void *sptr;
107 long ssize; /* positive == mmap, otherwise malloc */ 200 size_t ssize;
108 201
109 /* cpu state */ 202 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 203 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
204 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111 JMPENV *top_env; 205 JMPENV *top_env;
112 coro_context cctx; 206 coro_context cctx;
113} coro_stack; 207
208#if CORO_USE_VALGRIND
209 int valgrind_id;
210#endif
211 unsigned char flags;
212} coro_cctx;
213
214enum {
215 CF_RUNNING = 0x0001, /* coroutine is running */
216 CF_READY = 0x0002, /* coroutine is ready */
217 CF_NEW = 0x0004, /* has never been switched to */
218 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
219};
220
221/* the structure where most of the perl state is stored, overlaid on the cxstack */
222typedef struct {
223 SV *defsv;
224 AV *defav;
225 SV *errsv;
226 SV *irsgv;
227#define VAR(name,type) type name;
228# include "state.h"
229#undef VAR
230} perl_slots;
231
232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 233
115/* this is a structure representing a perl-level coroutine */ 234/* this is a structure representing a perl-level coroutine */
116struct coro { 235struct coro {
117 /* the c coroutine allocated to this perl coroutine, if any */ 236 /* the c coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 237 coro_cctx *cctx;
119 238
120 /* data associated with this coroutine (initial args) */ 239 /* 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; 240 AV *mainstack;
137 SV **stack_sp; 241 perl_slots *slot; /* basically the saved sp */
138 OP *op; 242
139 SV **curpad; 243 AV *args; /* data associated with this coroutine (initial args) */
140 AV *comppad; 244 int refcnt; /* coroutines are refcounted, yes */
141 CV *compcv; 245 int flags; /* CF_ flags */
142 SV **stack_base; 246 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 247
144 SV **tmps_stack; 248 /* statistics */
145 I32 tmps_floor; 249 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;
162 250
163 /* coro process data */ 251 /* coro process data */
164 int prio; 252 int prio;
253 SV *throw; /* exception to be thrown */
254
255 /* async_pool */
256 SV *saved_deffh;
257
258 /* linked list */
259 struct coro *next, *prev;
165}; 260};
166 261
167typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
169 264
265/** Coro ********************************************************************/
266
267#define PRIO_MAX 3
268#define PRIO_HIGH 1
269#define PRIO_NORMAL 0
270#define PRIO_LOW -1
271#define PRIO_IDLE -3
272#define PRIO_MIN -4
273
274/* for Coro.pm */
275static SV *coro_current;
276static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
278static int coro_nready;
279static struct coro *coro_first;
280
281/** lowlevel stuff **********************************************************/
282
283static SV *
284coro_get_sv (pTHX_ const char *name, int create)
285{
286#if PERL_VERSION_ATLEAST (5,10,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_sv (name, create);
289#endif
290 return get_sv (name, create);
291}
292
170static AV * 293static AV *
294coro_get_av (pTHX_ const char *name, int create)
295{
296#if PERL_VERSION_ATLEAST (5,10,0)
297 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
298 get_av (name, create);
299#endif
300 return get_av (name, create);
301}
302
303static HV *
304coro_get_hv (pTHX_ const char *name, int create)
305{
306#if PERL_VERSION_ATLEAST (5,10,0)
307 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
308 get_hv (name, create);
309#endif
310 return get_hv (name, create);
311}
312
313static AV *
171coro_clone_padlist (CV *cv) 314coro_clone_padlist (pTHX_ CV *cv)
172{ 315{
173 AV *padlist = CvPADLIST (cv); 316 AV *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 317 AV *newpadlist, *newpad;
175 318
176 newpadlist = newAV (); 319 newpadlist = newAV ();
177 AvREAL_off (newpadlist); 320 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0) 321#if PERL_VERSION_ATLEAST (5,10,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 322 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else 323#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 325#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
… …
188 331
189 return newpadlist; 332 return newpadlist;
190} 333}
191 334
192static void 335static void
193free_padlist (AV *padlist) 336free_padlist (pTHX_ AV *padlist)
194{ 337{
195 /* may be during global destruction */ 338 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 339 if (SvREFCNT (padlist))
197 { 340 {
198 I32 i = AvFILLp (padlist); 341 I32 i = AvFILLp (padlist);
… …
219 AV *padlist; 362 AV *padlist;
220 AV *av = (AV *)mg->mg_obj; 363 AV *av = (AV *)mg->mg_obj;
221 364
222 /* casting is fun. */ 365 /* casting is fun. */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 366 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224 free_padlist (padlist); 367 free_padlist (aTHX_ padlist);
225 368
226 SvREFCNT_dec (av); 369 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
227 370
228 return 0; 371 return 0;
229} 372}
230 373
231#define PERL_MAGIC_coro PERL_MAGIC_ext 374#define CORO_MAGIC_type_cv PERL_MAGIC_ext
375#define CORO_MAGIC_type_state PERL_MAGIC_ext
232 376
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 377static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0,
379 coro_cv_free
380};
381
382#define CORO_MAGIC(sv,type) \
383 SvMAGIC (sv) \
384 ? SvMAGIC (sv)->mg_type == type \
385 ? SvMAGIC (sv) \
386 : mg_find (sv, type) \
387 : 0
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391
392static struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
234 417
235/* the next two functions merely cache the padlists */ 418/* the next two functions merely cache the padlists */
236static void 419static void
237get_padlist (CV *cv) 420get_padlist (pTHX_ CV *cv)
238{ 421{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 422 MAGIC *mg = CORO_MAGIC_cv (cv);
423 AV *av;
240 424
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 425 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 426 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 427 else
244 { 428 {
245#if 0 429#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 430 /* this is probably cleaner? but also slower! */
431 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 432 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 433 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 434 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 435 SvREFCNT_dec (cp);
251#else 436#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 437 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 438#endif
254 } 439 }
255} 440}
256 441
257static void 442static void
258put_padlist (CV *cv) 443put_padlist (pTHX_ CV *cv)
259{ 444{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
261 447
262 if (!mg) 448 if (expect_false (!mg))
263 { 449 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 }
269 450
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 451 av = (AV *)mg->mg_obj;
271}
272 452
273#define SB do { 453 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274#define SE } while (0) 454 av_extend (av, AvMAX (av) + 1);
275 455
276#define LOAD(state) load_state((state)); 456 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277#define SAVE(state,flags) save_state((state),(flags)); 457}
278 458
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 459/** load & save, init *******************************************************/
280 460
281static void 461static void
282load_state(Coro__State c) 462load_perl (pTHX_ Coro__State c)
283{ 463{
284 PL_dowarn = c->dowarn; 464 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 465 c->slot = 0;
286 466
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 467 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;
317 468
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 469 GvSV (PL_defgv) = slot->defsv;
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 470 GvAV (PL_defgv) = slot->defav;
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 471 GvSV (PL_errgv) = slot->errsv;
472 GvSV (irsgv) = slot->irsgv;
473
474 #define VAR(name,type) PL_ ## name = slot->name;
475 # include "state.h"
476 #undef VAR
321 477
322 { 478 {
323 dSP; 479 dSP;
480
324 CV *cv; 481 CV *cv;
325 482
326 /* now do the ugly restore mess */ 483 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 484 while (expect_true (cv = (CV *)POPs))
328 { 485 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 486 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 487 CvDEPTH (cv) = PTR2IV (POPs);
335 } 488 CvPADLIST (cv) = (AV *)POPs;
336
337 ++CvDEPTH(cv);
338 } 489 }
339 490
340 PUTBACK; 491 PUTBACK;
341 } 492 }
342} 493}
343 494
344static void 495static void
345save_state(Coro__State c, int flags) 496save_perl (pTHX_ Coro__State c)
346{ 497{
347 { 498 {
348 dSP; 499 dSP;
349 I32 cxix = cxstack_ix; 500 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 501 PERL_CONTEXT *ccstk = cxstack;
… …
353 /* 504 /*
354 * the worst thing you can imagine happens first - we have to save 505 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 506 * (and reinitialize) all cv's in the whole callchain :(
356 */ 507 */
357 508
358 PUSHs (Nullsv); 509 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 510 /* this loop was inspired by pp_caller */
360 for (;;) 511 for (;;)
361 { 512 {
362 while (cxix >= 0) 513 while (expect_true (cxix >= 0))
363 { 514 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 515 PERL_CONTEXT *cx = &ccstk[cxix--];
365 516
366 if (CxTYPE(cx) == CXt_SUB) 517 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
367 { 518 {
368 CV *cv = cx->blk_sub.cv; 519 CV *cv = cx->blk_sub.cv;
520
369 if (CvDEPTH(cv)) 521 if (expect_true (CvDEPTH (cv)))
370 { 522 {
371 EXTEND (SP, CvDEPTH(cv)*2); 523 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)); 524 PUSHs ((SV *)CvPADLIST (cv));
525 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 526 PUSHs ((SV *)cv);
382 527
528 CvDEPTH (cv) = 0;
383 get_padlist (cv); 529 get_padlist (aTHX_ cv);
384 } 530 }
385 } 531 }
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 } 532 }
395 533
396 if (top_si->si_type == PERLSI_MAIN) 534 if (expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 535 break;
398 536
399 top_si = top_si->si_prev; 537 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 538 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 539 cxix = top_si->si_cxix;
402 } 540 }
403 541
404 PUTBACK; 542 PUTBACK;
405 } 543 }
406 544
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 545 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 546 /* we manually unroll here, as usually 2 slots is enough */
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 547 if (SLOT_COUNT >= 1) CXINC;
548 if (SLOT_COUNT >= 2) CXINC;
549 if (SLOT_COUNT >= 3) CXINC;
550 {
551 int i;
552 for (i = 3; i < SLOT_COUNT; ++i)
553 CXINC;
554 }
555 cxstack_ix -= SLOT_COUNT; /* undo allocation */
410 556
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; 557 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 558
418 c->op = PL_op; 559 {
419 c->curpad = PL_curpad; 560 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 561
421 c->compcv = PL_compcv; 562 slot->defav = GvAV (PL_defgv);
422 c->stack_base = PL_stack_base; 563 slot->defsv = DEFSV;
423 c->stack_max = PL_stack_max; 564 slot->errsv = ERRSV;
424 c->tmps_stack = PL_tmps_stack; 565 slot->irsgv = GvSV (irsgv);
425 c->tmps_floor = PL_tmps_floor; 566
426 c->tmps_ix = PL_tmps_ix; 567 #define VAR(name,type) slot->name = PL_ ## name;
427 c->tmps_max = PL_tmps_max; 568 # include "state.h"
428 c->markstack = PL_markstack; 569 #undef VAR
429 c->markstack_ptr = PL_markstack_ptr; 570 }
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} 571}
445 572
446/* 573/*
447 * allocate various perl stacks. This is an exact copy 574 * allocate various perl stacks. This is an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 575 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 576 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 577 * not usually need a lot of stackspace.
451 */ 578 */
579#if CORO_PREFER_PERL_FUNCTIONS
580# define coro_init_stacks init_stacks
581#else
452static void 582static void
453coro_init_stacks () 583coro_init_stacks (pTHX)
454{ 584{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 585 PL_curstackinfo = new_stackinfo(32, 8);
456 PL_curstackinfo->si_type = PERLSI_MAIN; 586 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 587 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 588 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 589
460 PL_stack_base = AvARRAY(PL_curstack); 590 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 591 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 592 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 593
464 New(50,PL_tmps_stack,96,SV*); 594 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 595 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 596 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 597 PL_tmps_max = 32;
468 598
469 New(54,PL_markstack,16,I32); 599 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 600 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 601 PL_markstack_max = PL_markstack + 16;
472 602
473#ifdef SET_MARK_OFFSET 603#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 604 SET_MARK_OFFSET;
475#endif 605#endif
476 606
477 New(54,PL_scopestack,16,I32); 607 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 608 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 609 PL_scopestack_max = 8;
480 610
481 New(54,PL_savestack,96,ANY); 611 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 612 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 613 PL_savestack_max = 24;
484 614
485#if !PERL_VERSION_ATLEAST (5,9,0) 615#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 616 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 617 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 618 PL_retstack_max = 4;
489#endif 619#endif
490} 620}
621#endif
491 622
492/* 623/*
493 * destroy the stacks, the callchain etc... 624 * destroy the stacks, the callchain etc...
494 */ 625 */
495static void 626static void
496coro_destroy_stacks() 627coro_destroy_stacks (pTHX)
497{ 628{
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) 629 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 630 PL_curstackinfo = PL_curstackinfo->si_next;
511 631
512 while (PL_curstackinfo) 632 while (PL_curstackinfo)
513 { 633 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 634 PERL_SI *p = PL_curstackinfo->si_prev;
515 635
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 636 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 637 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 638
528 Safefree (PL_curstackinfo->si_cxstack); 639 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 640 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 641 PL_curstackinfo = p;
531 } 642 }
532 643
533 Safefree (PL_tmps_stack); 644 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 645 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 646 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 647 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 648#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 649 Safefree (PL_retstack);
539#endif 650#endif
540} 651}
541 652
653static size_t
654coro_rss (pTHX_ struct coro *coro)
655{
656 size_t rss = sizeof (*coro);
657
658 if (coro->mainstack)
659 {
660 perl_slots tmp_slot;
661 perl_slots *slot;
662
663 if (coro->flags & CF_RUNNING)
664 {
665 slot = &tmp_slot;
666
667 #define VAR(name,type) slot->name = PL_ ## name;
668 # include "state.h"
669 #undef VAR
670 }
671 else
672 slot = coro->slot;
673
674 if (slot)
675 {
676 rss += sizeof (slot->curstackinfo);
677 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
678 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
679 rss += slot->tmps_max * sizeof (SV *);
680 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
681 rss += slot->scopestack_max * sizeof (I32);
682 rss += slot->savestack_max * sizeof (ANY);
683
684#if !PERL_VERSION_ATLEAST (5,10,0)
685 rss += slot->retstack_max * sizeof (OP *);
686#endif
687 }
688 }
689
690 return rss;
691}
692
693/** coroutine stack handling ************************************************/
694
695static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
696static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
697static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
698
699/* apparently < 5.8.8 */
700#ifndef MgPV_nolen_const
701#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
702 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
703 (const char*)(mg)->mg_ptr)
704#endif
705
706/*
707 * This overrides the default magic get method of %SIG elements.
708 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
709 * and instead of tryign to save and restore the hash elements, we just provide
710 * readback here.
711 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
712 * not expecting this to actually change the hook. This is a potential problem
713 * when a schedule happens then, but we ignore this.
714 */
715static int
716coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
717{
718 const char *s = MgPV_nolen_const (mg);
719
720 if (*s == '_')
721 {
722 SV **svp = 0;
723
724 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
725 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
726
727 if (svp)
728 {
729 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
730 return 0;
731 }
732 }
733
734 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
735}
736
737static int
738coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
739{
740 const char *s = MgPV_nolen_const (mg);
741
742 if (*s == '_')
743 {
744 SV **svp = 0;
745
746 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
747 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
748
749 if (svp)
750 {
751 SV *old = *svp;
752 *svp = 0;
753 SvREFCNT_dec (old);
754 return 0;
755 }
756 }
757
758 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
759}
760
761static int
762coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
763{
764 const char *s = MgPV_nolen_const (mg);
765
766 if (*s == '_')
767 {
768 SV **svp = 0;
769
770 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
771 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
772
773 if (svp)
774 {
775 SV *old = *svp;
776 *svp = newSVsv (sv);
777 SvREFCNT_dec (old);
778 return 0;
779 }
780 }
781
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
783}
784
542static void 785static void
543setup_coro (struct coro *coro) 786coro_setup (pTHX_ struct coro *coro)
544{ 787{
545 /* 788 /*
546 * emulate part of the perl startup here. 789 * emulate part of the perl startup here.
547 */ 790 */
548
549 coro_init_stacks (); 791 coro_init_stacks (aTHX);
550 792
793 PL_runops = RUNOPS_DEFAULT;
794 PL_curcop = &PL_compiling;
795 PL_in_eval = EVAL_NULL;
551 PL_curcop = 0; 796 PL_comppad = 0;
552 PL_in_eval = 0;
553 PL_curpm = 0; 797 PL_curpm = 0;
798 PL_curpad = 0;
799 PL_localizing = 0;
800 PL_dirty = 0;
801 PL_restartop = 0;
802#if PERL_VERSION_ATLEAST (5,10,0)
803 PL_parser = 0;
804#endif
805
806 /* recreate the die/warn hooks */
807 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
808 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
809
810 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
554 816
555 { 817 {
556 dSP; 818 dSP;
557 LOGOP myop; 819 LOGOP myop;
558 820
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); 821 Zero (&myop, 1, LOGOP);
566 myop.op_next = Nullop; 822 myop.op_next = Nullop;
567 myop.op_flags = OPf_WANT_VOID; 823 myop.op_flags = OPf_WANT_VOID;
568 824
825 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
827 PUTBACK;
569 PL_op = (OP *)&myop; 828 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); 829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575 SPAGAIN; 830 SPAGAIN;
576
577 ENTER; /* necessary e.g. for dounwind */
578 } 831 }
832
833 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub.
835 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
836 * so we ENTER here for symmetry
837 */
838 ENTER;
579} 839}
580 840
581static void 841static void
842coro_destroy (pTHX_ struct coro *coro)
843{
844 if (!IN_DESTRUCT)
845 {
846 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0);
848 assert (PL_tmps_floor == -1);
849
850 /* free all temporaries */
851 FREETMPS;
852 assert (PL_tmps_ix == -1);
853
854 /* unwind all extra stacks */
855 POPSTACK_TO (PL_mainstack);
856
857 /* unwind main stack */
858 dounwind (-1);
859 }
860
861 SvREFCNT_dec (GvSV (PL_defgv));
862 SvREFCNT_dec (GvAV (PL_defgv));
863 SvREFCNT_dec (GvSV (PL_errgv));
864 SvREFCNT_dec (PL_defoutgv);
865 SvREFCNT_dec (PL_rs);
866 SvREFCNT_dec (GvSV (irsgv));
867
868 SvREFCNT_dec (PL_diehook);
869 SvREFCNT_dec (PL_warnhook);
870
871 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw);
873
874 coro_destroy_stacks (aTHX);
875}
876
877static void
582free_coro_mortal () 878free_coro_mortal (pTHX)
583{ 879{
584 if (coro_mortal) 880 if (expect_true (coro_mortal))
585 { 881 {
586 SvREFCNT_dec (coro_mortal); 882 SvREFCNT_dec (coro_mortal);
587 coro_mortal = 0; 883 coro_mortal = 0;
588 } 884 }
589} 885}
590 886
887static int
888runops_trace (pTHX)
889{
890 COP *oldcop = 0;
891 int oldcxix = -2;
892 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
893 coro_cctx *cctx = coro->cctx;
894
895 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
896 {
897 PERL_ASYNC_CHECK ();
898
899 if (cctx->flags & CC_TRACE_ALL)
900 {
901 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
902 {
903 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
904 SV **bot, **top;
905 AV *av = newAV (); /* return values */
906 SV **cb;
907 dSP;
908
909 GV *gv = CvGV (cx->blk_sub.cv);
910 SV *fullname = sv_2mortal (newSV (0));
911 if (isGV (gv))
912 gv_efullname3 (fullname, gv, 0);
913
914 bot = PL_stack_base + cx->blk_oldsp + 1;
915 top = cx->blk_gimme == G_ARRAY ? SP + 1
916 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot;
918
919 av_extend (av, top - bot);
920 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++));
922
923 PL_runops = RUNOPS_DEFAULT;
924 ENTER;
925 SAVETMPS;
926 EXTEND (SP, 3);
927 PUSHMARK (SP);
928 PUSHs (&PL_sv_no);
929 PUSHs (fullname);
930 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
931 PUTBACK;
932 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
933 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
934 SPAGAIN;
935 FREETMPS;
936 LEAVE;
937 PL_runops = runops_trace;
938 }
939
940 if (oldcop != PL_curcop)
941 {
942 oldcop = PL_curcop;
943
944 if (PL_curcop != &PL_compiling)
945 {
946 SV **cb;
947
948 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
949 {
950 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
951
952 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
953 {
954 runops_proc_t old_runops = PL_runops;
955 dSP;
956 GV *gv = CvGV (cx->blk_sub.cv);
957 SV *fullname = sv_2mortal (newSV (0));
958
959 if (isGV (gv))
960 gv_efullname3 (fullname, gv, 0);
961
962 PL_runops = RUNOPS_DEFAULT;
963 ENTER;
964 SAVETMPS;
965 EXTEND (SP, 3);
966 PUSHMARK (SP);
967 PUSHs (&PL_sv_yes);
968 PUSHs (fullname);
969 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
970 PUTBACK;
971 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
972 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
973 SPAGAIN;
974 FREETMPS;
975 LEAVE;
976 PL_runops = runops_trace;
977 }
978
979 oldcxix = cxstack_ix;
980 }
981
982 if (cctx->flags & CC_TRACE_LINE)
983 {
984 dSP;
985
986 PL_runops = RUNOPS_DEFAULT;
987 ENTER;
988 SAVETMPS;
989 EXTEND (SP, 3);
990 PL_runops = RUNOPS_DEFAULT;
991 PUSHMARK (SP);
992 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
993 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
994 PUTBACK;
995 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
996 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
997 SPAGAIN;
998 FREETMPS;
999 LEAVE;
1000 PL_runops = runops_trace;
1001 }
1002 }
1003 }
1004 }
1005 }
1006
1007 TAINT_NOT;
1008 return 0;
1009}
1010
1011/* inject a fake call to Coro::State::_cctx_init into the execution */
1012/* _cctx_init should be careful, as it could be called at almost any time */
1013/* during execution of a perl program */
591static void NOINLINE 1014static void NOINLINE
592prepare_cctx (coro_stack *cctx) 1015cctx_prepare (pTHX_ coro_cctx *cctx)
593{ 1016{
594 dSP; 1017 dSP;
595 LOGOP myop; 1018 LOGOP myop;
596 1019
1020 PL_top_env = &PL_start_env;
1021
1022 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace;
1024
597 Zero (&myop, 1, LOGOP); 1025 Zero (&myop, 1, LOGOP);
598 myop.op_next = PL_op; 1026 myop.op_next = PL_op;
599 myop.op_flags = OPf_WANT_VOID; 1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
600
601 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602 1028
603 PUSHMARK (SP); 1029 PUSHMARK (SP);
1030 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
604 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
605 PUTBACK; 1033 PUTBACK;
1034 PL_op = (OP *)&myop;
606 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607 SPAGAIN; 1036 SPAGAIN;
608} 1037}
609 1038
1039/*
1040 * this is a _very_ stripped down perl interpreter ;)
1041 */
610static void 1042static void
611coro_run (void *arg) 1043cctx_run (void *arg)
612{ 1044{
1045 dTHX;
1046
613 /* coro_run is the alternative epilogue of transfer() */ 1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */
614 UNLOCK; 1048 UNLOCK;
615 1049
1050 /* we now skip the entersub that lead to transfer() */
1051 PL_op = PL_op->op_next;
1052
1053 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055
1056 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op;
1058 perl_run (PL_curinterp);
1059
616 /* 1060 /*
617 * this is a _very_ stripped down perl interpreter ;) 1061 * If perl-run returns we assume exit() was being called or the coro
1062 * fell off the end, which seems to be the only valid (non-bug)
1063 * reason for perl_run to return. We try to exit by jumping to the
1064 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept
618 */ 1066 */
619 PL_top_env = &PL_start_env; 1067 PL_top_env = main_top_env;
620 /* inject call to cctx_init */ 1068 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} 1069}
629 1070
630static coro_stack * 1071static coro_cctx *
631stack_new () 1072cctx_new ()
632{ 1073{
633 coro_stack *stack; 1074 coro_cctx *cctx;
1075 void *stack_start;
1076 size_t stack_size;
634 1077
1078 ++cctx_count;
1079
635 New (0, stack, 1, coro_stack); 1080 Newz (0, cctx, 1, coro_cctx);
636 1081
637#if HAVE_MMAP 1082#if HAVE_MMAP
638
639 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640 /* mmap suppsedly does allocate-on-write for us */ 1084 /* 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); 1085 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642 1086
643 if (stack->sptr == (void *)-1) 1087 if (cctx->sptr != (void *)-1)
644 {
645 perror ("FATAL: unable to mmap stack for coroutine");
646 _exit (EXIT_FAILURE);
647 } 1088 {
648
649# if STACKGUARD 1089# if CORO_STACKGUARD
650 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
651# endif 1091# endif
652 1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
653#else 1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
654 1094 cctx->flags |= CC_MAPPED;
655 stack->ssize = STACKSIZE * (long)sizeof (long);
656 New (0, stack->sptr, STACKSIZE, long);
657
658 if (!stack->sptr)
659 { 1095 }
1096 else
1097#endif
1098 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long);
1101
1102 if (!cctx->sptr)
1103 {
660 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1104 perror ("FATAL: unable to allocate stack for coroutine");
661 _exit (EXIT_FAILURE); 1105 _exit (EXIT_FAILURE);
662 } 1106 }
663 1107
664#endif 1108 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize;
1110 }
665 1111
666 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
667 1114
668 return stack; 1115 return cctx;
669} 1116}
670 1117
671static void 1118static void
672stack_free (coro_stack *stack) 1119cctx_destroy (coro_cctx *cctx)
673{ 1120{
674 if (!stack) 1121 if (!cctx)
675 return; 1122 return;
676 1123
1124 --cctx_count;
1125
1126#if CORO_USE_VALGRIND
1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1128#endif
1129
677#if HAVE_MMAP 1130#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED)
678 munmap (stack->sptr, stack->ssize); 1132 munmap (cctx->sptr, cctx->ssize);
679#else 1133 else
1134#endif
680 Safefree (stack->sptr); 1135 Safefree (cctx->sptr);
681#endif
682 1136
683 Safefree (stack); 1137 Safefree (cctx);
684} 1138}
685 1139
686static coro_stack *stack_first; 1140/* wether this cctx should be destructed */
687static int cctx_count, cctx_idle; 1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
688 1142
689static coro_stack * 1143static coro_cctx *
690stack_get () 1144cctx_get (pTHX)
691{ 1145{
692 coro_stack *stack; 1146 while (expect_true (cctx_first))
693
694 if (stack_first)
695 { 1147 {
1148 coro_cctx *cctx = cctx_first;
1149 cctx_first = cctx->next;
696 --cctx_idle; 1150 --cctx_idle;
697 stack = stack_first; 1151
698 stack_first = stack->next; 1152 if (expect_true (!CCTX_EXPIRED (cctx)))
699 } 1153 return cctx;
700 else 1154
701 { 1155 cctx_destroy (cctx);
702 ++cctx_count;
703 stack = stack_new ();
704 PL_op = PL_op->op_next;
705 } 1156 }
706 1157
707 return stack; 1158 return cctx_new ();
708} 1159}
709 1160
710static void 1161static void
711stack_put (coro_stack *stack) 1162cctx_put (coro_cctx *cctx)
712{ 1163{
1164 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1166 {
1167 coro_cctx *first = cctx_first;
1168 cctx_first = first->next;
1169 --cctx_idle;
1170
1171 cctx_destroy (first);
1172 }
1173
713 ++cctx_idle; 1174 ++cctx_idle;
714 stack->next = stack_first; 1175 cctx->next = cctx_first;
715 stack_first = stack; 1176 cctx_first = cctx;
716} 1177}
717 1178
718/* never call directly, always through the coro_state_transfer global variable */ 1179/** coroutine switching *****************************************************/
1180
1181static void
1182transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{
1184 if (expect_true (prev != next))
1185 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1187 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1188
1189 if (expect_false (next->flags & CF_RUNNING))
1190 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1191
1192 if (expect_false (next->flags & CF_DESTROYED))
1193 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1194
1195#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1197 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1198#endif
1199 }
1200}
1201
1202/* always use the TRANSFER macro */
719static void NOINLINE 1203static void NOINLINE
720transfer (struct coro *prev, struct coro *next, int flags) 1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
721{ 1205{
722 dSTACKLEVEL; 1206 dSTACKLEVEL;
1207 static volatile int has_throw;
723 1208
724 /* sometimes transfer is only called to set idle_sp */ 1209 /* sometimes transfer is only called to set idle_sp */
725 if (flags == TRANSFER_SET_STACKLEVEL) 1210 if (expect_false (!next))
1211 {
726 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
727 else if (prev != next) 1213 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
728 { 1214 }
1215 else if (expect_true (prev != next))
1216 {
729 coro_stack *prev__stack; 1217 coro_cctx *prev__cctx;
1218
1219 if (expect_false (prev->flags & CF_NEW))
1220 {
1221 /* create a new empty context */
1222 Newz (0, prev->cctx, 1, coro_cctx);
1223 prev->flags &= ~CF_NEW;
1224 prev->flags |= CF_RUNNING;
1225 }
1226
1227 prev->flags &= ~CF_RUNNING;
1228 next->flags |= CF_RUNNING;
730 1229
731 LOCK; 1230 LOCK;
732 1231
733 if (next->mainstack) 1232 /* first get rid of the old state */
1233 save_perl (aTHX_ prev);
1234
1235 if (expect_false (next->flags & CF_NEW))
734 { 1236 {
735 /* coroutine already started */ 1237 /* need to start coroutine */
736 SAVE (prev, flags); 1238 next->flags &= ~CF_NEW;
737 LOAD (next); 1239 /* setup coroutine call */
1240 coro_setup (aTHX_ next);
738 } 1241 }
739 else 1242 else
1243 load_perl (aTHX_ next);
1244
1245 prev__cctx = prev->cctx;
1246
1247 /* possibly "free" the cctx */
1248 if (expect_true (
1249 prev__cctx->idle_sp == STACKLEVEL
1250 && !(prev__cctx->flags & CC_TRACE)
1251 && !force_cctx
1252 ))
740 { 1253 {
741 /* need to start coroutine */ 1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742 /* first get rid of the old state */ 1255 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
743 SAVE (prev, -1); 1256
744 /* setup coroutine call */ 1257 prev->cctx = 0;
745 setup_coro (next); 1258
746 /* need a stack */ 1259 /* 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; 1260 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1261 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1262 if (!next->cctx)
1263 next->cctx = cctx_get (aTHX);
1264
1265 cctx_put (prev__cctx);
748 } 1266 }
749 1267
750 if (!prev->stack) 1268 ++next->usecount;
751 /* create a new empty context */
752 Newz (0, prev->stack, 1, coro_stack);
753 1269
754 prev__stack = prev->stack; 1270 if (expect_true (!next->cctx))
1271 next->cctx = cctx_get (aTHX);
755 1272
756 /* possibly "free" the stack */ 1273 has_throw = !!next->throw;
757 if (prev__stack->idle_sp == STACKLEVEL) 1274
1275 if (expect_false (prev__cctx != next->cctx))
758 { 1276 {
759 stack_put (prev__stack); 1277 prev__cctx->top_env = PL_top_env;
760 prev->stack = 0; 1278 PL_top_env = next->cctx->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
761 } 1280 }
762 1281
763 if (!next->stack) 1282 free_coro_mortal (aTHX);
764 next->stack = stack_get (); 1283 UNLOCK;
765 1284
766 if (prev__stack != next->stack) 1285 if (expect_false (has_throw))
767 { 1286 {
768 prev__stack->top_env = PL_top_env; 1287 struct coro *coro = SvSTATE (coro_current);
769 PL_top_env = next->stack->top_env; 1288
770 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1289 if (coro->throw)
1290 {
1291 SV *exception = coro->throw;
1292 coro->throw = 0;
1293 sv_setsv (ERRSV, exception);
1294 croak (0);
1295 }
771 } 1296 }
1297 }
1298}
772 1299
773 free_coro_mortal (); 1300struct transfer_args
1301{
1302 struct coro *prev, *next;
1303};
774 1304
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1306#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1307
1308/** high level stuff ********************************************************/
1309
1310static int
1311coro_state_destroy (pTHX_ struct coro *coro)
1312{
1313 if (coro->flags & CF_DESTROYED)
1314 return 0;
1315
1316 coro->flags |= CF_DESTROYED;
1317
1318 if (coro->flags & CF_READY)
1319 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready;
775 UNLOCK; 1324 UNLOCK;
776 } 1325 }
777} 1326 else
778 1327 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 1328
793 if (coro->mainstack && coro->mainstack != main_mainstack) 1329 if (coro->mainstack && coro->mainstack != main_mainstack)
794 { 1330 {
795 struct coro temp; 1331 struct coro temp;
796 1332
797 SAVE ((&temp), TRANSFER_SAVE_ALL); 1333 if (coro->flags & CF_RUNNING)
798 LOAD (coro); 1334 croak ("FATAL: tried to destroy currently running coroutine");
799 1335
800 coro_destroy_stacks (); 1336 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro);
801 1338
802 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1339 coro_destroy (aTHX_ coro);
803 1340
1341 load_perl (aTHX_ &temp);
1342
804 coro->mainstack = 0; 1343 coro->slot = 0;
805 } 1344 }
806 1345
807 stack_free (coro->stack); 1346 cctx_destroy (coro->cctx);
808 SvREFCNT_dec (coro->args); 1347 SvREFCNT_dec (coro->args);
809 Safefree (coro); 1348
1349 if (coro->next) coro->next->prev = coro->prev;
1350 if (coro->prev) coro->prev->next = coro->next;
1351 if (coro == coro_first) coro_first = coro->next;
1352
1353 return 1;
810} 1354}
811 1355
812static int 1356static int
813coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1357coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814{ 1358{
815 struct coro *coro = (struct coro *)mg->mg_ptr; 1359 struct coro *coro = (struct coro *)mg->mg_ptr;
816 mg->mg_ptr = 0; 1360 mg->mg_ptr = 0;
817 1361
1362 coro->hv = 0;
1363
1364 if (--coro->refcnt < 0)
1365 {
818 coro_state_destroy (coro); 1366 coro_state_destroy (aTHX_ coro);
1367 Safefree (coro);
1368 }
819 1369
820 return 0; 1370 return 0;
821} 1371}
822 1372
823static int 1373static int
… …
830 return 0; 1380 return 0;
831} 1381}
832 1382
833static MGVTBL coro_state_vtbl = { 1383static MGVTBL coro_state_vtbl = {
834 0, 0, 0, 0, 1384 0, 0, 0, 0,
835 coro_state_clear, 1385 coro_state_free,
836 0, 1386 0,
837#ifdef MGf_DUP 1387#ifdef MGf_DUP
838 coro_state_dup, 1388 coro_state_dup,
839#else 1389#else
840# define MGf_DUP 0 1390# define MGf_DUP 0
841#endif 1391#endif
842}; 1392};
843 1393
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 1394static void
867prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
868{ 1396{
869 ta->prev = SvSTATE (prev); 1397 ta->prev = SvSTATE (prev_sv);
870 ta->next = SvSTATE (next); 1398 ta->next = SvSTATE (next_sv);
871 ta->flags = flags; 1399 TRANSFER_CHECK (*ta);
872} 1400}
873 1401
874static void 1402static void
875api_transfer (SV *prev, SV *next, int flags) 1403api_transfer (SV *prev_sv, SV *next_sv)
876{ 1404{
877 dTHX; 1405 dTHX;
878 struct transfer_args ta; 1406 struct transfer_args ta;
879 1407
880 prepare_transfer (&ta, prev, next, flags); 1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881 TRANSFER (ta); 1409 TRANSFER (ta, 1);
882} 1410}
883 1411
884/** Coro ********************************************************************/ 1412/** Coro ********************************************************************/
885 1413
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 1414static void
899coro_enq (SV *sv) 1415coro_enq (pTHX_ SV *coro_sv)
1416{
1417 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1418}
1419
1420static SV *
1421coro_deq (pTHX)
900{ 1422{
901 int prio; 1423 int prio;
902 1424
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; ) 1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
922 if (AvFILLp (coro_ready [prio]) >= 0) 1426 if (AvFILLp (coro_ready [prio]) >= 0)
923 {
924 coro_nready--;
925 return av_shift (coro_ready [prio]); 1427 return av_shift (coro_ready [prio]);
926 }
927 1428
928 return 0; 1429 return 0;
929} 1430}
930 1431
1432static int
1433api_ready (SV *coro_sv)
1434{
1435 dTHX;
1436 struct coro *coro;
1437 SV *sv_hook;
1438 void (*xs_hook)(void);
1439
1440 if (SvROK (coro_sv))
1441 coro_sv = SvRV (coro_sv);
1442
1443 coro = SvSTATE (coro_sv);
1444
1445 if (coro->flags & CF_READY)
1446 return 0;
1447
1448 coro->flags |= CF_READY;
1449
1450 LOCK;
1451
1452 sv_hook = coro_nready ? 0 : coro_readyhook;
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1454
1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1456 ++coro_nready;
1457
1458 UNLOCK;
1459
1460 if (sv_hook)
1461 {
1462 dSP;
1463
1464 ENTER;
1465 SAVETMPS;
1466
1467 PUSHMARK (SP);
1468 PUTBACK;
1469 call_sv (sv_hook, G_DISCARD);
1470 SPAGAIN;
1471
1472 FREETMPS;
1473 LEAVE;
1474 }
1475
1476 if (xs_hook)
1477 xs_hook ();
1478
1479 return 1;
1480}
1481
1482static int
1483api_is_ready (SV *coro_sv)
1484{
1485 dTHX;
1486 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1487}
1488
931static void 1489static void
932api_ready (SV *coro) 1490prepare_schedule (pTHX_ struct transfer_args *ta)
933{ 1491{
934 dTHX; 1492 SV *prev_sv, *next_sv;
935 1493
936 if (SvROK (coro)) 1494 for (;;)
937 coro = SvRV (coro); 1495 {
1496 LOCK;
1497 next_sv = coro_deq (aTHX);
1498
1499 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv))
1501 {
1502 dSP;
1503 UNLOCK;
1504
1505 ENTER;
1506 SAVETMPS;
1507
1508 PUSHMARK (SP);
1509 PUTBACK;
1510 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1511 SPAGAIN;
1512
1513 FREETMPS;
1514 LEAVE;
1515 continue;
1516 }
1517
1518 ta->next = SvSTATE (next_sv);
1519
1520 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */
1526 continue;
1527 }
1528
1529 --coro_nready;
1530 UNLOCK;
1531 break;
1532 }
1533
1534 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current);
1536 ta->prev = SvSTATE (prev_sv);
1537 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY);
1539 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv);
938 1541
939 LOCK; 1542 LOCK;
940 coro_enq (SvREFCNT_inc (coro)); 1543 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv;
941 UNLOCK; 1545 UNLOCK;
942} 1546}
943 1547
944static void 1548static 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) 1549prepare_cede (pTHX_ struct transfer_args *ta)
991{ 1550{
992 LOCK; 1551 api_ready (coro_current);
993 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994 UNLOCK;
995
996 prepare_schedule (ta); 1552 prepare_schedule (aTHX_ ta);
1553}
1554
1555static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta)
1557{
1558 if (coro_nready)
1559 {
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta);
1562 api_ready (prev);
1563 return 1;
1564 }
1565 else
1566 return 0;
997} 1567}
998 1568
999static void 1569static void
1000api_schedule (void) 1570api_schedule (void)
1001{ 1571{
1002 dTHX; 1572 dTHX;
1003 struct transfer_args ta; 1573 struct transfer_args ta;
1004 1574
1005 prepare_schedule (&ta); 1575 prepare_schedule (aTHX_ &ta);
1006 TRANSFER (ta); 1576 TRANSFER (ta, 1);
1007} 1577}
1008 1578
1009static void 1579static int
1010api_cede (void) 1580api_cede (void)
1011{ 1581{
1012 dTHX; 1582 dTHX;
1013 struct transfer_args ta; 1583 struct transfer_args ta;
1014 1584
1015 prepare_cede (&ta); 1585 prepare_cede (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
1016 TRANSFER (ta); 1589 TRANSFER (ta, 1);
1590 return 1;
1591 }
1592 else
1593 return 0;
1017} 1594}
1018 1595
1596static int
1597api_cede_notself (void)
1598{
1599 dTHX;
1600 struct transfer_args ta;
1601
1602 if (prepare_cede_notself (aTHX_ &ta))
1603 {
1604 TRANSFER (ta, 1);
1605 return 1;
1606 }
1607 else
1608 return 0;
1609}
1610
1611static void
1612api_trace (SV *coro_sv, int flags)
1613{
1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv);
1616
1617 if (flags & CC_TRACE)
1618 {
1619 if (!coro->cctx)
1620 coro->cctx = cctx_new ();
1621 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack");
1623
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 {
1628 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1629
1630 if (coro->flags & CF_RUNNING)
1631 PL_runops = RUNOPS_DEFAULT;
1632 else
1633 coro->slot->runops = RUNOPS_DEFAULT;
1634 }
1635}
1636
1637static int
1638coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1639{
1640 AV *padlist;
1641 AV *av = (AV *)mg->mg_obj;
1642
1643 abort ();
1644
1645 return 0;
1646}
1647
1648static MGVTBL coro_gensub_vtbl = {
1649 0, 0, 0, 0,
1650 coro_gensub_free
1651};
1652
1653/*****************************************************************************/
1654/* PerlIO::cede */
1655
1656typedef struct
1657{
1658 PerlIOBuf base;
1659 NV next, every;
1660} PerlIOCede;
1661
1662static IV
1663PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1664{
1665 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1666
1667 self->every = SvNV (arg);
1668 self->next = nvtime () + self->every;
1669
1670 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1671}
1672
1673static SV *
1674PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1675{
1676 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1677
1678 return newSVnv (self->every);
1679}
1680
1681static IV
1682PerlIOCede_flush (pTHX_ PerlIO *f)
1683{
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime ();
1686
1687 if (now >= self->next)
1688 {
1689 api_cede ();
1690 self->next = now + self->every;
1691 }
1692
1693 return PerlIOBuf_flush (f);
1694}
1695
1696static PerlIO_funcs PerlIO_cede =
1697{
1698 sizeof(PerlIO_funcs),
1699 "cede",
1700 sizeof(PerlIOCede),
1701 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1702 PerlIOCede_pushed,
1703 PerlIOBuf_popped,
1704 PerlIOBuf_open,
1705 PerlIOBase_binmode,
1706 PerlIOCede_getarg,
1707 PerlIOBase_fileno,
1708 PerlIOBuf_dup,
1709 PerlIOBuf_read,
1710 PerlIOBuf_unread,
1711 PerlIOBuf_write,
1712 PerlIOBuf_seek,
1713 PerlIOBuf_tell,
1714 PerlIOBuf_close,
1715 PerlIOCede_flush,
1716 PerlIOBuf_fill,
1717 PerlIOBase_eof,
1718 PerlIOBase_error,
1719 PerlIOBase_clearerr,
1720 PerlIOBase_setlinebuf,
1721 PerlIOBuf_get_base,
1722 PerlIOBuf_bufsiz,
1723 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt,
1726};
1727
1728
1019MODULE = Coro::State PACKAGE = Coro::State 1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1020 1730
1021PROTOTYPES: DISABLE 1731PROTOTYPES: DISABLE
1022 1732
1023BOOT: 1733BOOT:
1024{ 1734{
1025#ifdef USE_ITHREADS 1735#ifdef USE_ITHREADS
1026 MUTEX_INIT (&coro_mutex); 1736 MUTEX_INIT (&coro_mutex);
1027#endif 1737#endif
1028 BOOT_PAGESIZE; 1738 BOOT_PAGESIZE;
1029 1739
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1742
1743 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1744 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1745 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1746
1747 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1748 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1749 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1750
1030 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1751 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031 1752
1032 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1753 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1033 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1754 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1034 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1755 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1756 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1035 1757
1036 main_mainstack = PL_mainstack; 1758 main_mainstack = PL_mainstack;
1759 main_top_env = PL_top_env;
1037 1760
1761 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev;
1763
1038 coroapi.ver = CORO_API_VERSION; 1764 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION;
1039 coroapi.transfer = api_transfer; 1766 coroapi.transfer = api_transfer;
1767
1768 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770
1771 if (!svp) croak ("Time::HiRes is required");
1772 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1773
1774 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1775 }
1040 1776
1041 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1777 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1042} 1778}
1043 1779
1044SV * 1780SV *
1045new (char *klass, ...) 1781new (char *klass, ...)
1046 CODE: 1782 CODE:
1047{ 1783{
1048 struct coro *coro; 1784 struct coro *coro;
1785 MAGIC *mg;
1049 HV *hv; 1786 HV *hv;
1050 int i; 1787 int i;
1051 1788
1052 Newz (0, coro, 1, struct coro); 1789 Newz (0, coro, 1, struct coro);
1053 coro->args = newAV (); 1790 coro->args = newAV ();
1791 coro->flags = CF_NEW;
1054 1792
1793 if (coro_first) coro_first->prev = coro;
1794 coro->next = coro_first;
1795 coro_first = coro;
1796
1055 hv = newHV (); 1797 coro->hv = hv = newHV ();
1056 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1798 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1799 mg->mg_flags |= MGf_DUP;
1057 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1800 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058 1801
1802 av_extend (coro->args, items - 1);
1059 for (i = 1; i < items; i++) 1803 for (i = 1; i < items; i++)
1060 av_push (coro->args, newSVsv (ST (i))); 1804 av_push (coro->args, newSVsv (ST (i)));
1061
1062 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1063 /*coro->stack = 0;*/
1064} 1805}
1065 OUTPUT: 1806 OUTPUT:
1066 RETVAL 1807 RETVAL
1067 1808
1809# these not obviously related functions are all rolled into the same xs
1810# function to increase chances that they all will call transfer with the same
1811# stack offset
1068void 1812void
1069_set_stacklevel (...) 1813_set_stacklevel (...)
1070 ALIAS: 1814 ALIAS:
1071 Coro::State::transfer = 1 1815 Coro::State::transfer = 1
1072 Coro::schedule = 2 1816 Coro::schedule = 2
1073 Coro::cede = 3 1817 Coro::cede = 3
1074 Coro::Cont::yield = 4 1818 Coro::cede_notself = 4
1075 CODE: 1819 CODE:
1076{ 1820{
1077 struct transfer_args ta; 1821 struct transfer_args ta;
1078 1822
1823 PUTBACK;
1079 switch (ix) 1824 switch (ix)
1080 { 1825 {
1081 case 0: 1826 case 0:
1082 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1083 ta.next = 0; 1828 ta.next = 0;
1084 ta.flags = TRANSFER_SET_STACKLEVEL;
1085 break; 1829 break;
1086 1830
1087 case 1: 1831 case 1:
1088 if (items != 3) 1832 if (items != 2)
1089 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1833 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1090 1834
1091 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1835 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1092 break; 1836 break;
1093 1837
1094 case 2: 1838 case 2:
1095 prepare_schedule (&ta); 1839 prepare_schedule (aTHX_ &ta);
1096 break; 1840 break;
1097 1841
1098 case 3: 1842 case 3:
1099 prepare_cede (&ta); 1843 prepare_cede (aTHX_ &ta);
1100 break; 1844 break;
1101 1845
1102 case 4: 1846 case 4:
1103 { 1847 if (!prepare_cede_notself (aTHX_ &ta))
1104 SV *yieldstack; 1848 XSRETURN_EMPTY;
1105 SV *sv;
1106 AV *defav = GvAV (PL_defgv);
1107 1849
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; 1850 break;
1127
1128 } 1851 }
1852 SPAGAIN;
1129 1853
1854 BARRIER;
1855 PUTBACK;
1130 TRANSFER (ta); 1856 TRANSFER (ta, 0);
1857 SPAGAIN; /* might be the sp of a different coroutine now */
1858 /* be extra careful not to ever do anything after TRANSFER */
1131} 1859}
1860
1861bool
1862_destroy (SV *coro_sv)
1863 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1865 OUTPUT:
1866 RETVAL
1132 1867
1133void 1868void
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) 1869_exit (int code)
1147 int code
1148 PROTOTYPE: $ 1870 PROTOTYPE: $
1149 CODE: 1871 CODE:
1150 _exit (code); 1872 _exit (code);
1151 1873
1874int
1875cctx_stacksize (int new_stacksize = 0)
1876 CODE:
1877 RETVAL = coro_stacksize;
1878 if (new_stacksize)
1879 coro_stacksize = new_stacksize;
1880 OUTPUT:
1881 RETVAL
1882
1883int
1884cctx_count ()
1885 CODE:
1886 RETVAL = cctx_count;
1887 OUTPUT:
1888 RETVAL
1889
1890int
1891cctx_idle ()
1892 CODE:
1893 RETVAL = cctx_idle;
1894 OUTPUT:
1895 RETVAL
1896
1897void
1898list ()
1899 PPCODE:
1900{
1901 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv)
1904 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1905}
1906
1907void
1908call (Coro::State coro, SV *coderef)
1909 ALIAS:
1910 eval = 1
1911 CODE:
1912{
1913 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1914 {
1915 struct coro temp;
1916
1917 if (!(coro->flags & CF_RUNNING))
1918 {
1919 PUTBACK;
1920 save_perl (aTHX_ &temp);
1921 load_perl (aTHX_ coro);
1922 }
1923
1924 {
1925 dSP;
1926 ENTER;
1927 SAVETMPS;
1928 PUTBACK;
1929 PUSHSTACK;
1930 PUSHMARK (SP);
1931
1932 if (ix)
1933 eval_sv (coderef, 0);
1934 else
1935 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1936
1937 POPSTACK;
1938 SPAGAIN;
1939 FREETMPS;
1940 LEAVE;
1941 PUTBACK;
1942 }
1943
1944 if (!(coro->flags & CF_RUNNING))
1945 {
1946 save_perl (aTHX_ coro);
1947 load_perl (aTHX_ &temp);
1948 SPAGAIN;
1949 }
1950 }
1951}
1952
1953SV *
1954is_ready (Coro::State coro)
1955 PROTOTYPE: $
1956 ALIAS:
1957 is_ready = CF_READY
1958 is_running = CF_RUNNING
1959 is_new = CF_NEW
1960 is_destroyed = CF_DESTROYED
1961 CODE:
1962 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT:
1964 RETVAL
1965
1966void
1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1968
1969SV *
1970has_cctx (Coro::State coro)
1971 PROTOTYPE: $
1972 CODE:
1973 RETVAL = boolSV (!!coro->cctx);
1974 OUTPUT:
1975 RETVAL
1976
1977int
1978is_traced (Coro::State coro)
1979 PROTOTYPE: $
1980 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT:
1983 RETVAL
1984
1985IV
1986rss (Coro::State coro)
1987 PROTOTYPE: $
1988 ALIAS:
1989 usecount = 1
1990 CODE:
1991 switch (ix)
1992 {
1993 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1994 case 1: RETVAL = coro->usecount; break;
1995 }
1996 OUTPUT:
1997 RETVAL
1998
1999void
2000force_cctx ()
2001 CODE:
2002 struct coro *coro = SvSTATE (coro_current);
2003 coro->cctx->idle_sp = 0;
2004
2005void
2006throw (Coro::State self, SV *throw = &PL_sv_undef)
2007 PROTOTYPE: $;$
2008 CODE:
2009 SvREFCNT_dec (self->throw);
2010 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2011
2012void
2013swap_defsv (Coro::State self)
2014 PROTOTYPE: $
2015 ALIAS:
2016 swap_defav = 1
2017 CODE:
2018 if (!self->slot)
2019 croak ("cannot swap state with coroutine that has no saved state");
2020 else
2021 {
2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2024
2025 SV *tmp = *src; *src = *dst; *dst = tmp;
2026 }
2027
1152MODULE = Coro::State PACKAGE = Coro 2028MODULE = Coro::State PACKAGE = Coro
1153 2029
1154BOOT: 2030BOOT:
1155{ 2031{
1156 int i; 2032 int i;
1157 2033
2034 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2035 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2036 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2037
2038 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2039 SvREADONLY_on (coro_current);
2040
1158 coro_stash = gv_stashpv ("Coro", TRUE); 2041 coro_stash = gv_stashpv ("Coro", TRUE);
1159 2042
1160 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2043 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1161 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2044 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1162 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2045 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1163 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2046 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1164 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2047 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1165 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2048 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1166 2049
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--; ) 2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171 coro_ready[i] = newAV (); 2051 coro_ready[i] = newAV ();
1172 2052
1173 { 2053 {
1174 SV *sv = perl_get_sv("Coro::API", 1); 2054 SV *sv = perl_get_sv ("Coro::API", TRUE);
2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1175 2056
1176 coroapi.schedule = api_schedule; 2057 coroapi.schedule = api_schedule;
1177 coroapi.cede = api_cede; 2058 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself;
1178 coroapi.ready = api_ready; 2060 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready;
1179 coroapi.nready = &coro_nready; 2062 coroapi.nready = &coro_nready;
1180 coroapi.current = coro_current; 2063 coroapi.current = coro_current;
1181 2064
1182 GCoroAPI = &coroapi; 2065 GCoroAPI = &coroapi;
1183 sv_setiv (sv, (IV)&coroapi); 2066 sv_setiv (sv, (IV)&coroapi);
1184 SvREADONLY_on (sv); 2067 SvREADONLY_on (sv);
1185 } 2068 }
1186} 2069}
2070
2071void
2072_set_current (SV *current)
2073 PROTOTYPE: $
2074 CODE:
2075 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
2077
2078void
2079_set_readyhook (SV *hook)
2080 PROTOTYPE: $
2081 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook);
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2085 UNLOCK;
1187 2086
1188int 2087int
1189prio (Coro::State coro, int newprio = 0) 2088prio (Coro::State coro, int newprio = 0)
1190 ALIAS: 2089 ALIAS:
1191 nice = 1 2090 nice = 1
… …
1194 RETVAL = coro->prio; 2093 RETVAL = coro->prio;
1195 2094
1196 if (items > 1) 2095 if (items > 1)
1197 { 2096 {
1198 if (ix) 2097 if (ix)
1199 newprio += coro->prio; 2098 newprio = coro->prio - newprio;
1200 2099
1201 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2100 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1202 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2101 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1203 2102
1204 coro->prio = newprio; 2103 coro->prio = newprio;
1205 } 2104 }
1206} 2105}
2106 OUTPUT:
2107 RETVAL
1207 2108
1208void 2109SV *
1209ready (SV *self) 2110ready (SV *self)
1210 PROTOTYPE: $ 2111 PROTOTYPE: $
1211 CODE: 2112 CODE:
1212 api_ready (self); 2113 RETVAL = boolSV (api_ready (self));
2114 OUTPUT:
2115 RETVAL
1213 2116
1214int 2117int
1215nready (...) 2118nready (...)
1216 PROTOTYPE: 2119 PROTOTYPE:
1217 CODE: 2120 CODE:
1218 RETVAL = coro_nready; 2121 RETVAL = coro_nready;
1219 OUTPUT: 2122 OUTPUT:
1220 RETVAL 2123 RETVAL
1221 2124
2125# for async_pool speedup
2126void
2127_pool_1 (SV *cb)
2128 CODE:
2129{
2130 struct coro *coro = SvSTATE (coro_current);
2131 HV *hv = (HV *)SvRV (coro_current);
2132 AV *defav = GvAV (PL_defgv);
2133 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2134 AV *invoke_av;
2135 int i, len;
2136
2137 if (!invoke)
2138 {
2139 SV *old = PL_diehook;
2140 PL_diehook = 0;
2141 SvREFCNT_dec (old);
2142 croak ("\3async_pool terminate\2\n");
2143 }
2144
2145 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2147
2148 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150
2151 invoke_av = (AV *)SvRV (invoke);
2152 len = av_len (invoke_av);
2153
2154 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2155
2156 if (len > 0)
2157 {
2158 av_fill (defav, len - 1);
2159 for (i = 0; i < len; ++i)
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2161 }
2162
2163 SvREFCNT_dec (invoke);
2164}
2165
2166void
2167_pool_2 (SV *cb)
2168 CODE:
2169{
2170 struct coro *coro = SvSTATE (coro_current);
2171
2172 sv_setsv (cb, &PL_sv_undef);
2173
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0;
2176
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 {
2180 SV *old = PL_diehook;
2181 PL_diehook = 0;
2182 SvREFCNT_dec (old);
2183 croak ("\3async_pool terminate\2\n");
2184 }
2185
2186 av_clear (GvAV (PL_defgv));
2187 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189
2190 coro->prio = 0;
2191
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0);
2194
2195 av_push (av_async_pool, newSVsv (coro_current));
2196}
2197
2198#if 0
2199
2200void
2201_generator_call (...)
2202 PROTOTYPE: @
2203 PPCODE:
2204 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2205 xxxx
2206 abort ();
2207
2208SV *
2209gensub (SV *sub, ...)
2210 PROTOTYPE: &;@
2211 CODE:
2212{
2213 struct coro *coro;
2214 MAGIC *mg;
2215 CV *xcv;
2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2217 int i;
2218
2219 CvGV (ncv) = CvGV (cv);
2220 CvFILE (ncv) = CvFILE (cv);
2221
2222 Newz (0, coro, 1, struct coro);
2223 coro->args = newAV ();
2224 coro->flags = CF_NEW;
2225
2226 av_extend (coro->args, items - 1);
2227 for (i = 1; i < items; i++)
2228 av_push (coro->args, newSVsv (ST (i)));
2229
2230 CvISXSUB_on (ncv);
2231 CvXSUBANY (ncv).any_ptr = (void *)coro;
2232
2233 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2234
2235 CvXSUB (ncv) = CvXSUB (xcv);
2236 CvANON_on (ncv);
2237
2238 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2239 RETVAL = newRV_noinc ((SV *)ncv);
2240}
2241 OUTPUT:
2242 RETVAL
2243
2244#endif
2245
2246
1222MODULE = Coro::State PACKAGE = Coro::AIO 2247MODULE = Coro::State PACKAGE = Coro::AIO
1223 2248
1224SV * 2249SV *
1225_get_state () 2250_get_state ()
1226 CODE: 2251 CODE:
1227{ 2252{
1228 struct { 2253 struct io_state *data;
1229 int errorno;
1230 int laststype;
1231 int laststatval;
1232 Stat_t statcache;
1233 } data;
1234 2254
2255 RETVAL = newSV (sizeof (struct io_state));
2256 data = (struct io_state *)SvPVX (RETVAL);
2257 SvCUR_set (RETVAL, sizeof (struct io_state));
2258 SvPOK_only (RETVAL);
2259
1235 data.errorno = errno; 2260 data->errorno = errno;
1236 data.laststype = PL_laststype; 2261 data->laststype = PL_laststype;
1237 data.laststatval = PL_laststatval; 2262 data->laststatval = PL_laststatval;
1238 data.statcache = PL_statcache; 2263 data->statcache = PL_statcache;
1239
1240 RETVAL = newSVpvn ((char *)&data, sizeof data);
1241} 2264}
1242 OUTPUT: 2265 OUTPUT:
1243 RETVAL 2266 RETVAL
1244 2267
1245void 2268void
1246_set_state (char *data_) 2269_set_state (char *data_)
1247 PROTOTYPE: $ 2270 PROTOTYPE: $
1248 CODE: 2271 CODE:
1249{ 2272{
1250 struct { 2273 struct io_state *data = (void *)data_;
1251 int errorno;
1252 int laststype;
1253 int laststatval;
1254 Stat_t statcache;
1255 } *data = (void *)data_;
1256 2274
1257 errno = data->errorno; 2275 errno = data->errorno;
1258 PL_laststype = data->laststype; 2276 PL_laststype = data->laststype;
1259 PL_laststatval = data->laststatval; 2277 PL_laststatval = data->laststatval;
1260 PL_statcache = data->statcache; 2278 PL_statcache = data->statcache;
1261} 2279}
2280
2281
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent
2283
2284BOOT:
2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2286
2287SV *
2288_schedule (...)
2289 PROTOTYPE: @
2290 CODE:
2291{
2292 static int incede;
2293
2294 api_cede_notself ();
2295
2296 ++incede;
2297 while (coro_nready >= incede && api_cede ())
2298 ;
2299
2300 sv_setsv (sv_activity, &PL_sv_undef);
2301 if (coro_nready >= incede)
2302 {
2303 PUSHMARK (SP);
2304 PUTBACK;
2305 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2306 SPAGAIN;
2307 }
2308
2309 --incede;
2310}
2311
2312
2313MODULE = Coro::State PACKAGE = PerlIO::cede
2314
2315BOOT:
2316 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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