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Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.248 by root, Mon Sep 29 12:40:50 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
10# ifndef PL_ppaddr 66# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 67# define PL_ppaddr ppaddr
12# endif 68# endif
13# ifndef call_sv 69# ifndef call_sv
14# define call_sv perl_call_sv 70# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 81# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
27# endif 83# endif
28#endif 84#endif
29 85
30#include <stdio.h> 86/* 5.8.8 */
31#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
32 103
33#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34# undef STACKGUARD 105# undef CORO_STACKGUARD
35#endif
36
37#ifndef STACKGUARD
38# define STACKGUARD 0
39#endif
40
41#ifdef HAVE_MMAP
42# include <unistd.h>
43# include <sys/mman.h>
44# ifndef MAP_ANONYMOUS
45# ifdef MAP_ANON
46# define MAP_ANONYMOUS MAP_ANON
47# else
48# undef HAVE_MMAP
49# endif
50# endif 106#endif
51# include <limits.h> 107
52# ifndef PAGESIZE 108#ifndef CORO_STACKGUARD
53# define PAGESIZE pagesize 109# define CORO_STACKGUARD 0
54# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55static long pagesize;
56# else
57# define BOOT_PAGESIZE
58# endif 110#endif
59#endif
60 111
61/* The next macro should declare a variable stacklevel that contains and approximation 112/* prefer perl internal functions over our own? */
62 * to the current C stack pointer. Its property is that it changes with each call 113#ifndef CORO_PREFER_PERL_FUNCTIONS
63 * 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. */
64#define dSTACKLEVEL int stacklevel 119#define dSTACKLEVEL volatile char stacklevel
65#define STACKLEVEL ((void *)&stacklevel) 120#define STACKLEVEL ((void *)&stacklevel)
66 121
67#define IN_DESTRUCT (PL_main_cv == Nullcv) 122#define IN_DESTRUCT (PL_main_cv == Nullcv)
68 123
124#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value))
128#else
129# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr)
132#endif
133
134#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1)
136
137#define NOINLINE attribute ((noinline))
138
69#include "CoroAPI.h" 139#include "CoroAPI.h"
70
71#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72 140
73#ifdef USE_ITHREADS 141#ifdef USE_ITHREADS
74static perl_mutex coro_mutex; 142static perl_mutex coro_mutex;
75# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77#else 145#else
78# define LOCK (void)0 146# define LOCK (void)0
79# define UNLOCK (void)0 147# define UNLOCK (void)0
80#endif 148#endif
81 149
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;
82static struct CoroAPI coroapi; 162static struct CoroAPI coroapi;
83static 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;
84static HV *coro_state_stash, *coro_stash; 165static HV *coro_state_stash, *coro_stash;
85static 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};
86 193
87/* this is a structure representing a c-level coroutine */ 194/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack { 195typedef struct coro_cctx {
89 struct coro_stack *next; 196 struct coro_cctx *next;
90 197
91 /* the stack */ 198 /* the stack */
92 void *sptr; 199 void *sptr;
93 long ssize; /* positive == mmap, otherwise malloc */ 200 size_t ssize;
94 201
95 /* cpu state */ 202 /* cpu state */
96 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 */
97 JMPENV *top_env; 205 JMPENV *top_env;
98 coro_context cctx; 206 coro_context cctx;
99} 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))
100 233
101/* this is a structure representing a perl-level coroutine */ 234/* this is a structure representing a perl-level coroutine */
102struct coro { 235struct coro {
103 /* the c coroutine allocated to this perl coroutine, if any */ 236 /* the c coroutine allocated to this perl coroutine, if any */
104 coro_stack *stack; 237 coro_cctx *cctx;
105 238
106 /* data associated with this coroutine (initial args) */ 239 /* process data */
107 AV *args;
108 int refcnt;
109
110 /* optionally saved, might be zero */
111 AV *defav;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 240 AV *mainstack;
123 SV **stack_sp; 241 perl_slots *slot; /* basically the saved sp */
124 OP *op; 242
125 SV **curpad; 243 AV *args; /* data associated with this coroutine (initial args) */
126 AV *comppad; 244 int refcnt; /* coroutines are refcounted, yes */
127 CV *compcv; 245 int flags; /* CF_ flags */
128 SV **stack_base; 246 HV *hv; /* the perl hash associated with this coro, if any */
129 SV **stack_max; 247
130 SV **tmps_stack; 248 /* statistics */
131 I32 tmps_floor; 249 int usecount; /* number of transfers to this coro */
132 I32 tmps_ix;
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 250
149 /* coro process data */ 251 /* coro process data */
150 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;
151}; 260};
152 261
153typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
154typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
155 264
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
156static 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 *
157coro_clone_padlist (CV *cv) 314coro_clone_padlist (pTHX_ CV *cv)
158{ 315{
159 AV *padlist = CvPADLIST (cv); 316 AV *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad; 317 AV *newpadlist, *newpad;
161 318
162 newpadlist = newAV (); 319 newpadlist = newAV ();
163 AvREAL_off (newpadlist); 320 AvREAL_off (newpadlist);
164#if PERL_VERSION < 9 321#if PERL_VERSION_ATLEAST (5,10,0)
322 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
323#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168#endif 325#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 327 --AvFILLp (padlist);
171 328
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 329 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
174 331
175 return newpadlist; 332 return newpadlist;
176} 333}
177 334
178static void 335static void
179free_padlist (AV *padlist) 336free_padlist (pTHX_ AV *padlist)
180{ 337{
181 /* may be during global destruction */ 338 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 339 if (SvREFCNT (padlist))
183 { 340 {
184 I32 i = AvFILLp (padlist); 341 I32 i = AvFILLp (padlist);
… …
205 AV *padlist; 362 AV *padlist;
206 AV *av = (AV *)mg->mg_obj; 363 AV *av = (AV *)mg->mg_obj;
207 364
208 /* casting is fun. */ 365 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 366 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (padlist); 367 free_padlist (aTHX_ padlist);
211 368
212 SvREFCNT_dec (av); 369 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
213 370
214 return 0; 371 return 0;
215} 372}
216 373
217#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
218 376
219static 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))
220 417
221/* the next two functions merely cache the padlists */ 418/* the next two functions merely cache the padlists */
222static void 419static void
223get_padlist (CV *cv) 420get_padlist (pTHX_ CV *cv)
224{ 421{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 422 MAGIC *mg = CORO_MAGIC_cv (cv);
423 AV *av;
226 424
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 425 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 426 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 427 else
230 { 428 {
231#if 0 429#if CORO_PREFER_PERL_FUNCTIONS
232 /* this is probably cleaner, but also slower? */ 430 /* this is probably cleaner? but also slower! */
431 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (cv); 432 CV *cp = Perl_cv_clone (cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 433 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 434 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 435 SvREFCNT_dec (cp);
237#else 436#else
238 CvPADLIST (cv) = coro_clone_padlist (cv); 437 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
239#endif 438#endif
240 } 439 }
241} 440}
242 441
243static void 442static void
244put_padlist (CV *cv) 443put_padlist (pTHX_ CV *cv)
245{ 444{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
247 447
248 if (!mg) 448 if (expect_false (!mg))
249 { 449 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 }
255 450
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 451 av = (AV *)mg->mg_obj;
257}
258 452
259#define SB do { 453 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 454 av_extend (av, AvMAX (av) + 1);
261 455
262#define LOAD(state) load_state((state)); 456 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state((state),(flags)); 457}
264 458
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 459/** load & save, init *******************************************************/
266 460
267static void 461static void
268load_state(Coro__State c) 462load_perl (pTHX_ Coro__State c)
269{ 463{
270 PL_dowarn = c->dowarn; 464 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 465 c->slot = 0;
272 466
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 467 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 468
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 469 GvSV (PL_defgv) = slot->defsv;
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 470 GvAV (PL_defgv) = slot->defav;
306 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
307 477
308 { 478 {
309 dSP; 479 dSP;
480
310 CV *cv; 481 CV *cv;
311 482
312 /* now do the ugly restore mess */ 483 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 484 while (expect_true (cv = (CV *)POPs))
314 { 485 {
315 AV *padlist = (AV *)POPs;
316
317 if (padlist)
318 {
319 put_padlist (cv); /* mark this padlist as available */ 486 put_padlist (aTHX_ cv); /* mark this padlist as available */
320 CvPADLIST(cv) = padlist; 487 CvDEPTH (cv) = PTR2IV (POPs);
321 } 488 CvPADLIST (cv) = (AV *)POPs;
322
323 ++CvDEPTH(cv);
324 } 489 }
325 490
326 PUTBACK; 491 PUTBACK;
327 } 492 }
328} 493}
329 494
330static void 495static void
331save_state(Coro__State c, int flags) 496save_perl (pTHX_ Coro__State c)
332{ 497{
333 { 498 {
334 dSP; 499 dSP;
335 I32 cxix = cxstack_ix; 500 I32 cxix = cxstack_ix;
336 PERL_CONTEXT *ccstk = cxstack; 501 PERL_CONTEXT *ccstk = cxstack;
… …
339 /* 504 /*
340 * 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
341 * (and reinitialize) all cv's in the whole callchain :( 506 * (and reinitialize) all cv's in the whole callchain :(
342 */ 507 */
343 508
344 PUSHs (Nullsv); 509 XPUSHs (Nullsv);
345 /* this loop was inspired by pp_caller */ 510 /* this loop was inspired by pp_caller */
346 for (;;) 511 for (;;)
347 { 512 {
348 while (cxix >= 0) 513 while (expect_true (cxix >= 0))
349 { 514 {
350 PERL_CONTEXT *cx = &ccstk[cxix--]; 515 PERL_CONTEXT *cx = &ccstk[cxix--];
351 516
352 if (CxTYPE(cx) == CXt_SUB) 517 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
353 { 518 {
354 CV *cv = cx->blk_sub.cv; 519 CV *cv = cx->blk_sub.cv;
520
355 if (CvDEPTH(cv)) 521 if (expect_true (CvDEPTH (cv)))
356 { 522 {
357 EXTEND (SP, CvDEPTH(cv)*2); 523 EXTEND (SP, 3);
358
359 while (--CvDEPTH(cv))
360 {
361 /* this tells the restore code to increment CvDEPTH */
362 PUSHs (Nullsv);
363 PUSHs ((SV *)cv);
364 }
365
366 PUSHs ((SV *)CvPADLIST(cv)); 524 PUSHs ((SV *)CvPADLIST (cv));
525 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 526 PUSHs ((SV *)cv);
368 527
528 CvDEPTH (cv) = 0;
369 get_padlist (cv); 529 get_padlist (aTHX_ cv);
370 } 530 }
371 } 531 }
372#ifdef CXt_FORMAT
373 else if (CxTYPE(cx) == CXt_FORMAT)
374 {
375 /* I never used formats, so how should I know how these are implemented? */
376 /* my bold guess is as a simple, plain sub... */
377 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378 }
379#endif
380 } 532 }
381 533
382 if (top_si->si_type == PERLSI_MAIN) 534 if (expect_true (top_si->si_type == PERLSI_MAIN))
383 break; 535 break;
384 536
385 top_si = top_si->si_prev; 537 top_si = top_si->si_prev;
386 ccstk = top_si->si_cxstack; 538 ccstk = top_si->si_cxstack;
387 cxix = top_si->si_cxix; 539 cxix = top_si->si_cxix;
388 } 540 }
389 541
390 PUTBACK; 542 PUTBACK;
391 } 543 }
392 544
393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 545 /* allocate some space on the context stack for our purposes */
394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 546 /* we manually unroll here, as usually 2 slots is enough */
395 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 */
396 556
397 c->dowarn = PL_dowarn;
398 c->in_eval = PL_in_eval;
399
400 c->curstackinfo = PL_curstackinfo;
401 c->curstack = PL_curstack;
402 c->mainstack = PL_mainstack; 557 c->mainstack = PL_mainstack;
403 c->stack_sp = PL_stack_sp; 558
404 c->op = PL_op; 559 {
405 c->curpad = PL_curpad; 560 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
406 c->comppad = PL_comppad; 561
407 c->compcv = PL_compcv; 562 slot->defav = GvAV (PL_defgv);
408 c->stack_base = PL_stack_base; 563 slot->defsv = DEFSV;
409 c->stack_max = PL_stack_max; 564 slot->errsv = ERRSV;
410 c->tmps_stack = PL_tmps_stack; 565 slot->irsgv = GvSV (irsgv);
411 c->tmps_floor = PL_tmps_floor; 566
412 c->tmps_ix = PL_tmps_ix; 567 #define VAR(name,type) slot->name = PL_ ## name;
413 c->tmps_max = PL_tmps_max; 568 # include "state.h"
414 c->markstack = PL_markstack; 569 #undef VAR
415 c->markstack_ptr = PL_markstack_ptr; 570 }
416 c->markstack_max = PL_markstack_max;
417 c->scopestack = PL_scopestack;
418 c->scopestack_ix = PL_scopestack_ix;
419 c->scopestack_max = PL_scopestack_max;
420 c->savestack = PL_savestack;
421 c->savestack_ix = PL_savestack_ix;
422 c->savestack_max = PL_savestack_max;
423#if PERL_VERSION < 9
424 c->retstack = PL_retstack;
425 c->retstack_ix = PL_retstack_ix;
426 c->retstack_max = PL_retstack_max;
427#endif
428 c->curpm = PL_curpm;
429 c->curcop = PL_curcop;
430} 571}
431 572
432/* 573/*
433 * allocate various perl stacks. This is an exact copy 574 * allocate various perl stacks. This is an exact copy
434 * of perl.c:init_stacks, except that it uses less memory 575 * of perl.c:init_stacks, except that it uses less memory
435 * on the (sometimes correct) assumption that coroutines do 576 * on the (sometimes correct) assumption that coroutines do
436 * not usually need a lot of stackspace. 577 * not usually need a lot of stackspace.
437 */ 578 */
579#if CORO_PREFER_PERL_FUNCTIONS
580# define coro_init_stacks init_stacks
581#else
438static void 582static void
439coro_init_stacks () 583coro_init_stacks (pTHX)
440{ 584{
441 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 585 PL_curstackinfo = new_stackinfo(32, 8);
442 PL_curstackinfo->si_type = PERLSI_MAIN; 586 PL_curstackinfo->si_type = PERLSI_MAIN;
443 PL_curstack = PL_curstackinfo->si_stack; 587 PL_curstack = PL_curstackinfo->si_stack;
444 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 588 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445 589
446 PL_stack_base = AvARRAY(PL_curstack); 590 PL_stack_base = AvARRAY(PL_curstack);
447 PL_stack_sp = PL_stack_base; 591 PL_stack_sp = PL_stack_base;
448 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 592 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449 593
450 New(50,PL_tmps_stack,96,SV*); 594 New(50,PL_tmps_stack,32,SV*);
451 PL_tmps_floor = -1; 595 PL_tmps_floor = -1;
452 PL_tmps_ix = -1; 596 PL_tmps_ix = -1;
453 PL_tmps_max = 96; 597 PL_tmps_max = 32;
454 598
455 New(54,PL_markstack,16,I32); 599 New(54,PL_markstack,16,I32);
456 PL_markstack_ptr = PL_markstack; 600 PL_markstack_ptr = PL_markstack;
457 PL_markstack_max = PL_markstack + 16; 601 PL_markstack_max = PL_markstack + 16;
458 602
459#ifdef SET_MARK_OFFSET 603#ifdef SET_MARK_OFFSET
460 SET_MARK_OFFSET; 604 SET_MARK_OFFSET;
461#endif 605#endif
462 606
463 New(54,PL_scopestack,16,I32); 607 New(54,PL_scopestack,8,I32);
464 PL_scopestack_ix = 0; 608 PL_scopestack_ix = 0;
465 PL_scopestack_max = 16; 609 PL_scopestack_max = 8;
466 610
467 New(54,PL_savestack,96,ANY); 611 New(54,PL_savestack,24,ANY);
468 PL_savestack_ix = 0; 612 PL_savestack_ix = 0;
469 PL_savestack_max = 96; 613 PL_savestack_max = 24;
470 614
471#if PERL_VERSION < 9 615#if !PERL_VERSION_ATLEAST (5,10,0)
472 New(54,PL_retstack,8,OP*); 616 New(54,PL_retstack,4,OP*);
473 PL_retstack_ix = 0; 617 PL_retstack_ix = 0;
474 PL_retstack_max = 8; 618 PL_retstack_max = 4;
475#endif 619#endif
476} 620}
621#endif
477 622
478/* 623/*
479 * destroy the stacks, the callchain etc... 624 * destroy the stacks, the callchain etc...
480 */ 625 */
481static void 626static void
482destroy_stacks() 627coro_destroy_stacks (pTHX)
483{ 628{
484 if (!IN_DESTRUCT)
485 {
486 /* is this ugly, I ask? */
487 LEAVE_SCOPE (0);
488
489 /* sure it is, but more important: is it correct?? :/ */
490 FREETMPS;
491
492 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
493 }
494
495 while (PL_curstackinfo->si_next) 629 while (PL_curstackinfo->si_next)
496 PL_curstackinfo = PL_curstackinfo->si_next; 630 PL_curstackinfo = PL_curstackinfo->si_next;
497 631
498 while (PL_curstackinfo) 632 while (PL_curstackinfo)
499 { 633 {
500 PERL_SI *p = PL_curstackinfo->si_prev; 634 PERL_SI *p = PL_curstackinfo->si_prev;
501 635
502 { /*D*//*remove*/
503 dSP;
504 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505 PUTBACK; /* possibly superfluous */
506 }
507
508 if (!IN_DESTRUCT) 636 if (!IN_DESTRUCT)
509 {
510 dounwind (-1);/*D*//*remove*/
511 SvREFCNT_dec (PL_curstackinfo->si_stack); 637 SvREFCNT_dec (PL_curstackinfo->si_stack);
512 }
513 638
514 Safefree (PL_curstackinfo->si_cxstack); 639 Safefree (PL_curstackinfo->si_cxstack);
515 Safefree (PL_curstackinfo); 640 Safefree (PL_curstackinfo);
516 PL_curstackinfo = p; 641 PL_curstackinfo = p;
517 } 642 }
518 643
519 Safefree (PL_tmps_stack); 644 Safefree (PL_tmps_stack);
520 Safefree (PL_markstack); 645 Safefree (PL_markstack);
521 Safefree (PL_scopestack); 646 Safefree (PL_scopestack);
522 Safefree (PL_savestack); 647 Safefree (PL_savestack);
523#if PERL_VERSION < 9 648#if !PERL_VERSION_ATLEAST (5,10,0)
524 Safefree (PL_retstack); 649 Safefree (PL_retstack);
525#endif 650#endif
526} 651}
527 652
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
528static void 785static void
529setup_coro (struct coro *coro) 786coro_setup (pTHX_ struct coro *coro)
530{ 787{
531 /* 788 /*
532 * emulate part of the perl startup here. 789 * emulate part of the perl startup here.
533 */ 790 */
534 dTHX; 791 coro_init_stacks (aTHX);
792
793 PL_runops = RUNOPS_DEFAULT;
794 PL_curcop = &PL_compiling;
795 PL_in_eval = EVAL_NULL;
796 PL_comppad = 0;
797 PL_curpm = 0;
798 PL_curpad = 0;
799 PL_localizing = 0;
800 PL_dirty = 0;
801 PL_restartop = 0;
802#if PERL_VERSION_ATLEAST (5,10,0)
803 PL_parser = 0;
804#endif
805
806 /* recreate the die/warn hooks */
807 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
808 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
809
810 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
816
817 {
818 dSP;
819 LOGOP myop;
820
821 Zero (&myop, 1, LOGOP);
822 myop.op_next = Nullop;
823 myop.op_flags = OPf_WANT_VOID;
824
825 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
827 PUTBACK;
828 PL_op = (OP *)&myop;
829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
830 SPAGAIN;
831 }
832
833 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub.
835 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
836 * so we ENTER here for symmetry
837 */
838 ENTER;
839}
840
841static void
842coro_destroy (pTHX_ struct coro *coro)
843{
844 if (!IN_DESTRUCT)
845 {
846 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0);
848 assert (PL_tmps_floor == -1);
849
850 /* free all temporaries */
851 FREETMPS;
852 assert (PL_tmps_ix == -1);
853
854 /* unwind all extra stacks */
855 POPSTACK_TO (PL_mainstack);
856
857 /* unwind main stack */
858 dounwind (-1);
859 }
860
861 SvREFCNT_dec (GvSV (PL_defgv));
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
878free_coro_mortal (pTHX)
879{
880 if (expect_true (coro_mortal))
881 {
882 SvREFCNT_dec (coro_mortal);
883 coro_mortal = 0;
884 }
885}
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 */
1014static void NOINLINE
1015cctx_prepare (pTHX_ coro_cctx *cctx)
1016{
535 dSP; 1017 dSP;
536 UNOP myop; 1018 LOGOP myop;
537 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538 1019
539 coro_init_stacks (); 1020 PL_top_env = &PL_start_env;
540 /*PL_curcop = 0;*/
541 /*PL_in_eval = PL_in_eval;*/ /* inherit */
542 SvREFCNT_dec (GvAV (PL_defgv));
543 GvAV (PL_defgv) = coro->args; coro->args = 0;
544 1021
545 SPAGAIN; 1022 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace;
546 1024
547 Zero (&myop, 1, UNOP); 1025 Zero (&myop, 1, LOGOP);
548 myop.op_next = Nullop; 1026 myop.op_next = PL_op;
549 myop.op_flags = OPf_WANT_VOID; 1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
550 1028
1029 PUSHMARK (SP);
1030 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1033 PUTBACK;
551 PL_op = (OP *)&myop; 1034 PL_op = (OP *)&myop;
552
553 PUSHMARK(SP);
554 XPUSHs (sub_init);
555 PUTBACK;
556 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557 SPAGAIN; 1036 SPAGAIN;
558
559 ENTER; /* necessary e.g. for dounwind */
560} 1037}
561 1038
1039/*
1040 * this is a _very_ stripped down perl interpreter ;)
1041 */
562static void 1042static void
563free_coro_mortal () 1043cctx_run (void *arg)
564{ 1044{
565 if (coro_mortal) 1045 dTHX;
566 { 1046
567 SvREFCNT_dec (coro_mortal); 1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */
568 coro_mortal = 0; 1048 UNLOCK;
1049
1050 /* we now skip the entersub that lead to transfer() */
1051 PL_op = PL_op->op_next;
1052
1053 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055
1056 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op;
1058 perl_run (PL_curinterp);
1059
1060 /*
1061 * If perl-run returns we assume exit() was being called or the coro
1062 * fell off the end, which seems to be the only valid (non-bug)
1063 * reason for perl_run to return. We try to exit by jumping to the
1064 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept
1066 */
1067 PL_top_env = main_top_env;
1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1069}
1070
1071static coro_cctx *
1072cctx_new ()
1073{
1074 coro_cctx *cctx;
1075 void *stack_start;
1076 size_t stack_size;
1077
1078 ++cctx_count;
1079
1080 Newz (0, cctx, 1, coro_cctx);
1081
1082#if HAVE_MMAP
1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1084 /* mmap supposedly does allocate-on-write for us */
1085 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1086
1087 if (cctx->sptr != (void *)-1)
569 } 1088 {
1089# if CORO_STACKGUARD
1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1091# endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED;
1095 }
1096 else
1097#endif
1098 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long);
1101
1102 if (!cctx->sptr)
1103 {
1104 perror ("FATAL: unable to allocate stack for coroutine");
1105 _exit (EXIT_FAILURE);
1106 }
1107
1108 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize;
1110 }
1111
1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1114
1115 return cctx;
570} 1116}
571 1117
572static void 1118static void
573prepare_cctx (coro_stack *cctx) 1119cctx_destroy (coro_cctx *cctx)
574{ 1120{
575 dSP; 1121 if (!cctx)
576 UNOP myop; 1122 return;
577 1123
578 Zero (&myop, 1, UNOP); 1124 --cctx_count;
579 myop.op_next = PL_op;
580 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
581 1125
582 PUSHMARK(SP); 1126#if CORO_USE_VALGRIND
583 EXTEND (SP, 2); 1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
584 PUSHs (newSViv (PTR2IV (cctx))); 1128#endif
585 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 1129
586 PUTBACK; 1130#if HAVE_MMAP
587 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1131 if (cctx->flags & CC_MAPPED)
588 SPAGAIN; 1132 munmap (cctx->sptr, cctx->ssize);
1133 else
1134#endif
1135 Safefree (cctx->sptr);
1136
1137 Safefree (cctx);
1138}
1139
1140/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1142
1143static coro_cctx *
1144cctx_get (pTHX)
1145{
1146 while (expect_true (cctx_first))
1147 {
1148 coro_cctx *cctx = cctx_first;
1149 cctx_first = cctx->next;
1150 --cctx_idle;
1151
1152 if (expect_true (!CCTX_EXPIRED (cctx)))
1153 return cctx;
1154
1155 cctx_destroy (cctx);
1156 }
1157
1158 return cctx_new ();
589} 1159}
590 1160
591static void 1161static void
592coro_run (void *arg) 1162cctx_put (coro_cctx *cctx)
593{ 1163{
594 /* 1164 /* free another cctx if overlimit */
595 * this is a _very_ stripped down perl interpreter ;) 1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
596 */
597 UNLOCK;
598
599 PL_top_env = &PL_start_env;
600 prepare_cctx ((coro_stack *)arg);
601
602 /* somebody will hit me for both perl_run and PL_restartop */
603 perl_run (PERL_GET_CONTEXT);
604
605 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
606 abort ();
607}
608
609static coro_stack *
610stack_new ()
611{
612 coro_stack *stack;
613
614 New (0, stack, 1, coro_stack);
615
616#if HAVE_MMAP
617
618 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
619 /* mmap suppsedly does allocate-on-write for us */
620 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621
622 if (stack->sptr == (void *)-1)
623 {
624 perror ("FATAL: unable to mmap stack for coroutine");
625 _exit (EXIT_FAILURE);
626 } 1166 {
1167 coro_cctx *first = cctx_first;
1168 cctx_first = first->next;
1169 --cctx_idle;
627 1170
628# if STACKGUARD 1171 cctx_destroy (first);
629 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
630# endif
631
632#else
633
634 stack->ssize = STACKSIZE * (long)sizeof (long);
635 New (0, stack->sptr, STACKSIZE, long);
636
637 if (!stack->sptr)
638 { 1172 }
639 perror (stderr, "FATAL: unable to malloc stack for coroutine");
640 _exit (EXIT_FAILURE);
641 }
642 1173
643#endif 1174 ++cctx_idle;
644 1175 cctx->next = cctx_first;
645 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1176 cctx_first = cctx;
646
647 return stack;
648} 1177}
1178
1179/** coroutine switching *****************************************************/
649 1180
650static void 1181static void
651stack_free (coro_stack *stack) 1182transfer_check (pTHX_ struct coro *prev, struct coro *next)
652{ 1183{
653 if (!stack) 1184 if (expect_true (prev != next))
654 return;
655
656#if HAVE_MMAP
657 munmap (stack->sptr, stack->ssize);
658#else
659 Safefree (stack->sptr);
660#endif
661
662 Safefree (stack);
663}
664
665static coro_stack *stack_first;
666
667static coro_stack *
668stack_get ()
669{
670 coro_stack *stack;
671
672 if (stack_first)
673 {
674 stack = stack_first;
675 stack_first = stack->next;
676 }
677 else
678 { 1185 {
679 stack = stack_new (); 1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
680 PL_op = PL_op->op_next; 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
681 } 1199 }
682
683 return stack;
684} 1200}
685 1201
686static void 1202/* always use the TRANSFER macro */
687stack_put (coro_stack *stack) 1203static void NOINLINE
688{
689 stack->next = stack_first;
690 stack_first = stack;
691}
692
693/* never call directly, always through the coro_state_transfer global variable */
694static void
695transfer_impl (struct coro *prev, struct coro *next, int flags) 1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
696{ 1205{
697 dSTACKLEVEL; 1206 dSTACKLEVEL;
1207 static volatile int has_throw;
698 1208
699 /* sometimes transfer is only called to set idle_sp */ 1209 /* sometimes transfer is only called to set idle_sp */
700 if (flags == TRANSFER_SET_STACKLEVEL) 1210 if (expect_false (!next))
1211 {
701 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
702 else if (prev != next) 1213 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
703 { 1214 }
1215 else if (expect_true (prev != next))
1216 {
704 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;
705 1229
706 LOCK; 1230 LOCK;
707 1231
708 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))
709 { 1236 {
710 /* coroutine already started */ 1237 /* need to start coroutine */
711 SAVE (prev, flags); 1238 next->flags &= ~CF_NEW;
712 LOAD (next); 1239 /* setup coroutine call */
1240 coro_setup (aTHX_ next);
713 } 1241 }
714 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 ))
715 { 1253 {
716 /* need to start coroutine */ 1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
717 /* 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));
718 SAVE (prev, -1); 1256
719 /* setup coroutine call */ 1257 prev->cctx = 0;
720 setup_coro (next); 1258
721 /* 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 */
722 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);
723 } 1266 }
724 1267
725 if (!prev->stack) 1268 ++next->usecount;
726 /* create a new empty context */
727 Newz (0, prev->stack, 1, coro_stack);
728 1269
729 prev__stack = prev->stack; 1270 if (expect_true (!next->cctx))
1271 next->cctx = cctx_get (aTHX);
730 1272
731 /* possibly "free" the stack */ 1273 has_throw = !!next->throw;
732 if (prev__stack->idle_sp == STACKLEVEL) 1274
1275 if (expect_false (prev__cctx != next->cctx))
733 { 1276 {
734 stack_put (prev__stack); 1277 prev__cctx->top_env = PL_top_env;
735 prev->stack = 0; 1278 PL_top_env = next->cctx->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
736 } 1280 }
737 1281
738 if (!next->stack) 1282 free_coro_mortal (aTHX);
739 next->stack = stack_get (); 1283 UNLOCK;
740 1284
741 if (prev__stack != next->stack) 1285 if (expect_false (has_throw))
742 { 1286 {
743 prev__stack->top_env = PL_top_env; 1287 struct coro *coro = SvSTATE (coro_current);
744 PL_top_env = next->stack->top_env; 1288
745 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 }
746 } 1296 }
1297 }
1298}
747 1299
748 free_coro_mortal (); 1300struct transfer_args
1301{
1302 struct coro *prev, *next;
1303};
749 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;
750 UNLOCK; 1324 UNLOCK;
751 } 1325 }
752} 1326 else
753 1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
754/* use this function pointer to call the above function */
755/* this is done to increase chances of the compiler not inlining the call */
756/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
758
759struct transfer_args
760{
761 struct coro *prev, *next;
762 int flags;
763};
764
765#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
766
767static void
768coro_state_destroy (struct coro *coro)
769{
770 if (coro->refcnt--)
771 return;
772 1328
773 if (coro->mainstack && coro->mainstack != main_mainstack) 1329 if (coro->mainstack && coro->mainstack != main_mainstack)
774 { 1330 {
775 struct coro temp; 1331 struct coro temp;
776 1332
777 SAVE ((&temp), TRANSFER_SAVE_ALL); 1333 if (coro->flags & CF_RUNNING)
778 LOAD (coro); 1334 croak ("FATAL: tried to destroy currently running coroutine");
779 1335
780 destroy_stacks (); 1336 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro);
781 1338
782 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1339 coro_destroy (aTHX_ coro);
783 1340
1341 load_perl (aTHX_ &temp);
1342
784 coro->mainstack = 0; 1343 coro->slot = 0;
785 } 1344 }
786 1345
787 stack_free (coro->stack); 1346 cctx_destroy (coro->cctx);
788 SvREFCNT_dec (coro->args); 1347 SvREFCNT_dec (coro->args);
789 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;
790} 1354}
791 1355
792static int 1356static int
793coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1357coro_state_free (pTHX_ SV *sv, MAGIC *mg)
794{ 1358{
795 struct coro *coro = (struct coro *)mg->mg_ptr; 1359 struct coro *coro = (struct coro *)mg->mg_ptr;
796 mg->mg_ptr = 0; 1360 mg->mg_ptr = 0;
797 1361
1362 coro->hv = 0;
1363
1364 if (--coro->refcnt < 0)
1365 {
798 coro_state_destroy (coro); 1366 coro_state_destroy (aTHX_ coro);
1367 Safefree (coro);
1368 }
799 1369
800 return 0; 1370 return 0;
801} 1371}
802 1372
803static int 1373static int
… …
808 ++coro->refcnt; 1378 ++coro->refcnt;
809 1379
810 return 0; 1380 return 0;
811} 1381}
812 1382
813static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1383static MGVTBL coro_state_vtbl = {
814 1384 0, 0, 0, 0,
815static struct coro * 1385 coro_state_free,
816SvSTATE (SV *coro) 1386 0,
817{ 1387#ifdef MGf_DUP
818 HV *stash; 1388 coro_state_dup,
819 MAGIC *mg; 1389#else
820 1390# define MGf_DUP 0
821 if (SvROK (coro)) 1391#endif
822 coro = SvRV (coro); 1392};
823
824 stash = SvSTASH (coro);
825 if (stash != coro_stash && stash != coro_state_stash)
826 {
827 /* very slow, but rare, check */
828 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
829 croak ("Coro::State object required");
830 }
831
832 mg = SvMAGIC (coro);
833 assert (mg->mg_type == PERL_MAGIC_ext);
834 return (struct coro *)mg->mg_ptr;
835}
836 1393
837static void 1394static void
838prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
839{ 1396{
840 ta->prev = SvSTATE (prev); 1397 ta->prev = SvSTATE (prev_sv);
841 ta->next = SvSTATE (next); 1398 ta->next = SvSTATE (next_sv);
842 ta->flags = flags; 1399 TRANSFER_CHECK (*ta);
843} 1400}
844 1401
845static void 1402static void
846api_transfer (SV *prev, SV *next, int flags) 1403api_transfer (SV *prev_sv, SV *next_sv)
847{ 1404{
848 dTHX; 1405 dTHX;
849 struct transfer_args ta; 1406 struct transfer_args ta;
850 1407
851 prepare_transfer (&ta, prev, next, flags); 1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
852 TRANSFER (ta); 1409 TRANSFER (ta, 1);
853} 1410}
854 1411
855/** Coro ********************************************************************/ 1412/** Coro ********************************************************************/
856 1413
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void 1414static void
870coro_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)
871{ 1422{
872 int prio; 1423 int prio;
873 1424
874 if (SvTYPE (sv) != SVt_PVHV)
875 croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877 prio = SvSTATE (sv)->prio;
878
879 av_push (coro_ready [prio - PRIO_MIN], sv);
880 coro_nready++;
881}
882
883static SV *
884coro_deq (int min_prio)
885{
886 int prio = PRIO_MAX - PRIO_MIN;
887
888 min_prio -= PRIO_MIN;
889 if (min_prio < 0)
890 min_prio = 0;
891
892 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
893 if (AvFILLp (coro_ready [prio]) >= 0) 1426 if (AvFILLp (coro_ready [prio]) >= 0)
894 {
895 coro_nready--;
896 return av_shift (coro_ready [prio]); 1427 return av_shift (coro_ready [prio]);
897 }
898 1428
899 return 0; 1429 return 0;
900} 1430}
901 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
902static void 1489static void
903api_ready (SV *coro) 1490prepare_schedule (pTHX_ struct transfer_args *ta)
904{ 1491{
905 dTHX; 1492 SV *prev_sv, *next_sv;
906 1493
907 if (SvROK (coro)) 1494 for (;;)
908 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);
909 1541
910 LOCK; 1542 LOCK;
911 coro_enq (SvREFCNT_inc (coro)); 1543 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv;
912 UNLOCK; 1545 UNLOCK;
913} 1546}
914 1547
915static void 1548static void
916prepare_schedule (struct transfer_args *ta)
917{
918 SV *current, *prev, *next;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925 next = coro_deq (PRIO_MIN);
926 UNLOCK;
927
928 if (next)
929 break;
930
931 {
932 dSP;
933
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 }
944 }
945
946 prev = SvRV (current);
947 SvRV (current) = next;
948
949 /* free this only after the transfer */
950 LOCK;
951 free_coro_mortal ();
952 UNLOCK;
953 coro_mortal = prev;
954
955 ta->prev = SvSTATE (prev);
956 ta->next = SvSTATE (next);
957 ta->flags = TRANSFER_SAVE_ALL;
958}
959
960static void
961prepare_cede (struct transfer_args *ta) 1549prepare_cede (pTHX_ struct transfer_args *ta)
962{ 1550{
963 LOCK; 1551 api_ready (coro_current);
964 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966
967 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;
968} 1567}
969 1568
970static void 1569static void
971api_schedule (void) 1570api_schedule (void)
972{ 1571{
973 dTHX; 1572 dTHX;
974 struct transfer_args ta; 1573 struct transfer_args ta;
975 1574
976 prepare_schedule (&ta); 1575 prepare_schedule (aTHX_ &ta);
977 TRANSFER (ta); 1576 TRANSFER (ta, 1);
978} 1577}
979 1578
980static void 1579static int
981api_cede (void) 1580api_cede (void)
982{ 1581{
983 dTHX; 1582 dTHX;
984 struct transfer_args ta; 1583 struct transfer_args ta;
985 1584
986 prepare_cede (&ta); 1585 prepare_cede (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
987 TRANSFER (ta); 1589 TRANSFER (ta, 1);
1590 return 1;
1591 }
1592 else
1593 return 0;
988} 1594}
989 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 = SvCUR (arg) ? SvNV (arg) : 0.01;
1668 self->next = nvtime () + self->every;
1669
1670 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1671}
1672
1673static SV *
1674PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1675{
1676 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1677
1678 return newSVnv (self->every);
1679}
1680
1681static IV
1682PerlIOCede_flush (pTHX_ PerlIO *f)
1683{
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime ();
1686
1687 if (now >= self->next)
1688 {
1689 api_cede ();
1690 self->next = now + self->every;
1691 }
1692
1693 return PerlIOBuf_flush (aTHX_ f);
1694}
1695
1696static PerlIO_funcs PerlIO_cede =
1697{
1698 sizeof(PerlIO_funcs),
1699 "cede",
1700 sizeof(PerlIOCede),
1701 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1702 PerlIOCede_pushed,
1703 PerlIOBuf_popped,
1704 PerlIOBuf_open,
1705 PerlIOBase_binmode,
1706 PerlIOCede_getarg,
1707 PerlIOBase_fileno,
1708 PerlIOBuf_dup,
1709 PerlIOBuf_read,
1710 PerlIOBuf_unread,
1711 PerlIOBuf_write,
1712 PerlIOBuf_seek,
1713 PerlIOBuf_tell,
1714 PerlIOBuf_close,
1715 PerlIOCede_flush,
1716 PerlIOBuf_fill,
1717 PerlIOBase_eof,
1718 PerlIOBase_error,
1719 PerlIOBase_clearerr,
1720 PerlIOBase_setlinebuf,
1721 PerlIOBuf_get_base,
1722 PerlIOBuf_bufsiz,
1723 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt,
1726};
1727
1728
990MODULE = Coro::State PACKAGE = Coro::State 1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 1730
992PROTOTYPES: DISABLE 1731PROTOTYPES: DISABLE
993 1732
994BOOT: 1733BOOT:
995{ 1734{
996#ifdef USE_ITHREADS 1735#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 1736 MUTEX_INIT (&coro_mutex);
998#endif 1737#endif
999 BOOT_PAGESIZE; 1738 BOOT_PAGESIZE;
1000 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
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1751 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 1752
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1753 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1754 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 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));
1006 1757
1007 main_mainstack = PL_mainstack; 1758 main_mainstack = PL_mainstack;
1759 main_top_env = PL_top_env;
1008 1760
1761 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev;
1763
1009 coroapi.ver = CORO_API_VERSION; 1764 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION;
1010 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 }
1011 1776
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1777 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013} 1778}
1014 1779
1015SV * 1780SV *
1016new (char *klass, ...) 1781new (char *klass, ...)
1017 CODE: 1782 CODE:
1018{ 1783{
1019 struct coro *coro; 1784 struct coro *coro;
1785 MAGIC *mg;
1020 HV *hv; 1786 HV *hv;
1021 int i; 1787 int i;
1022 1788
1023 Newz (0, coro, 1, struct coro); 1789 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV (); 1790 coro->args = newAV ();
1791 coro->flags = CF_NEW;
1025 1792
1793 if (coro_first) coro_first->prev = coro;
1794 coro->next = coro_first;
1795 coro_first = coro;
1796
1026 hv = newHV (); 1797 coro->hv = hv = newHV ();
1027 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;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1800 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029 1801
1802 av_extend (coro->args, items - 1);
1030 for (i = 1; i < items; i++) 1803 for (i = 1; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i))); 1804 av_push (coro->args, newSVsv (ST (i)));
1032
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1034 /*coro->stack = 0;*/
1035} 1805}
1036 OUTPUT: 1806 OUTPUT:
1037 RETVAL 1807 RETVAL
1038 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
1039void 1812void
1040_set_stacklevel (...) 1813_set_stacklevel (...)
1041 ALIAS: 1814 ALIAS:
1042 Coro::State::transfer = 1 1815 Coro::State::transfer = 1
1043 Coro::schedule = 2 1816 Coro::schedule = 2
1044 Coro::cede = 3 1817 Coro::cede = 3
1045 Coro::Cont::yield = 4 1818 Coro::cede_notself = 4
1046 CODE: 1819 CODE:
1047{ 1820{
1048 struct transfer_args ta; 1821 struct transfer_args ta;
1049 1822
1823 PUTBACK;
1050 switch (ix) 1824 switch (ix)
1051 { 1825 {
1052 case 0: 1826 case 0:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054 ta.next = 0; 1828 ta.next = 0;
1055 ta.flags = TRANSFER_SET_STACKLEVEL;
1056 break; 1829 break;
1057 1830
1058 case 1: 1831 case 1:
1059 if (items != 3) 1832 if (items != 2)
1060 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);
1061 1834
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1835 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063 break; 1836 break;
1064 1837
1065 case 2: 1838 case 2:
1066 prepare_schedule (&ta); 1839 prepare_schedule (aTHX_ &ta);
1067 break; 1840 break;
1068 1841
1069 case 3: 1842 case 3:
1070 prepare_cede (&ta); 1843 prepare_cede (aTHX_ &ta);
1071 break; 1844 break;
1072 1845
1073 case 4: 1846 case 4:
1074 { 1847 if (!prepare_cede_notself (aTHX_ &ta))
1075 SV *yieldstack; 1848 XSRETURN_EMPTY;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078 1849
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv);
1096 }
1097 break; 1850 break;
1098
1099 } 1851 }
1852 SPAGAIN;
1100 1853
1854 BARRIER;
1855 PUTBACK;
1101 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 */
1102} 1859}
1860
1861bool
1862_destroy (SV *coro_sv)
1863 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1865 OUTPUT:
1866 RETVAL
1103 1867
1104void 1868void
1105_clone_state_from (SV *dst, SV *src)
1106 CODE:
1107{
1108 struct coro *coro_src = SvSTATE (src);
1109
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112 ++coro_src->refcnt;
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114}
1115
1116void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code) 1869_exit (int code)
1124 int code
1125 PROTOTYPE: $ 1870 PROTOTYPE: $
1126 CODE: 1871 CODE:
1127 _exit (code); 1872 _exit (code);
1128 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
1129MODULE = Coro::State PACKAGE = Coro 2028MODULE = Coro::State PACKAGE = Coro
1130 2029
1131BOOT: 2030BOOT:
1132{ 2031{
1133 int i; 2032 int i;
1134 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
1135 coro_stash = gv_stashpv ("Coro", TRUE); 2041 coro_stash = gv_stashpv ("Coro", TRUE);
1136 2042
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2043 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2044 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2045 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2046 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2047 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2048 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143 2049
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV (); 2051 coro_ready[i] = newAV ();
1149 2052
1150 { 2053 {
1151 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 */
1152 2056
1153 coroapi.schedule = api_schedule; 2057 coroapi.schedule = api_schedule;
1154 coroapi.cede = api_cede; 2058 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 2060 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 2062 coroapi.nready = &coro_nready;
1157 coroapi.current = coro_current; 2063 coroapi.current = coro_current;
1158 2064
1159 GCoroAPI = &coroapi; 2065 GCoroAPI = &coroapi;
1160 sv_setiv (sv, (IV)&coroapi); 2066 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 2067 SvREADONLY_on (sv);
1162 } 2068 }
1163} 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;
1164 2086
1165int 2087int
1166prio (Coro::State coro, int newprio = 0) 2088prio (Coro::State coro, int newprio = 0)
1167 ALIAS: 2089 ALIAS:
1168 nice = 1 2090 nice = 1
… …
1171 RETVAL = coro->prio; 2093 RETVAL = coro->prio;
1172 2094
1173 if (items > 1) 2095 if (items > 1)
1174 { 2096 {
1175 if (ix) 2097 if (ix)
1176 newprio += coro->prio; 2098 newprio = coro->prio - newprio;
1177 2099
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2100 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2101 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180 2102
1181 coro->prio = newprio; 2103 coro->prio = newprio;
1182 } 2104 }
1183} 2105}
2106 OUTPUT:
2107 RETVAL
1184 2108
1185void 2109SV *
1186ready (SV *self) 2110ready (SV *self)
1187 PROTOTYPE: $ 2111 PROTOTYPE: $
1188 CODE: 2112 CODE:
1189 api_ready (self); 2113 RETVAL = boolSV (api_ready (self));
2114 OUTPUT:
2115 RETVAL
1190 2116
1191int 2117int
1192nready (...) 2118nready (...)
1193 PROTOTYPE: 2119 PROTOTYPE:
1194 CODE: 2120 CODE:
1195 RETVAL = coro_nready; 2121 RETVAL = coro_nready;
1196 OUTPUT: 2122 OUTPUT:
1197 RETVAL 2123 RETVAL
1198 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
1199MODULE = Coro::State PACKAGE = Coro::AIO 2247MODULE = Coro::State PACKAGE = Coro::AIO
1200 2248
1201SV * 2249SV *
1202_get_state () 2250_get_state ()
1203 CODE: 2251 CODE:
1204{ 2252{
1205 struct { 2253 struct io_state *data;
1206 int errorno;
1207 int laststype;
1208 int laststatval;
1209 Stat_t statcache;
1210 } data;
1211 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
1212 data.errorno = errno; 2260 data->errorno = errno;
1213 data.laststype = PL_laststype; 2261 data->laststype = PL_laststype;
1214 data.laststatval = PL_laststatval; 2262 data->laststatval = PL_laststatval;
1215 data.statcache = PL_statcache; 2263 data->statcache = PL_statcache;
1216
1217 RETVAL = newSVpvn ((char *)&data, sizeof data);
1218} 2264}
1219 OUTPUT: 2265 OUTPUT:
1220 RETVAL 2266 RETVAL
1221 2267
1222void 2268void
1223_set_state (char *data_) 2269_set_state (char *data_)
1224 PROTOTYPE: $ 2270 PROTOTYPE: $
1225 CODE: 2271 CODE:
1226{ 2272{
1227 struct { 2273 struct io_state *data = (void *)data_;
1228 int errorno;
1229 int laststype;
1230 int laststatval;
1231 Stat_t statcache;
1232 } *data = (void *)data_;
1233 2274
1234 errno = data->errorno; 2275 errno = data->errorno;
1235 PL_laststype = data->laststype; 2276 PL_laststype = data->laststype;
1236 PL_laststatval = data->laststatval; 2277 PL_laststatval = data->laststatval;
1237 PL_statcache = data->statcache; 2278 PL_statcache = data->statcache;
1238} 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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