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Comparing Coro/Coro/State.xs (file contents):
Revision 1.107 by root, Mon Nov 27 02:15:51 2006 UTC vs.
Revision 1.240 by root, Sun Jun 29 00:28:17 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"
6 9
7#include "patchlevel.h" 10#include "patchlevel.h"
8 11
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39
40#include <stdio.h> 12#include <stdio.h>
41#include <errno.h> 13#include <errno.h>
14#include <assert.h>
42 15
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 16#ifdef WIN32
44# undef STACKGUARD 17# undef setjmp
45#endif 18# undef longjmp
46 19# undef _exit
47#ifndef STACKGUARD 20# define setjmp _setjmp // deep magic, don't ask
48# define STACKGUARD 0 21#else
22# include <inttypes.h> /* most portable stdint.h */
49#endif 23#endif
50 24
51#ifdef HAVE_MMAP 25#ifdef HAVE_MMAP
52# include <unistd.h> 26# include <unistd.h>
53# include <sys/mman.h> 27# include <sys/mman.h>
… …
69#else 43#else
70# define PAGESIZE 0 44# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 45# define BOOT_PAGESIZE (void)0
72#endif 46#endif
73 47
74/* The next macro should declare a variable stacklevel that contains and approximation 48#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 49# include <valgrind/valgrind.h>
76 * and should be unique. */ 50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif
54
55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8
57
58#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr
67# endif
68# ifndef call_sv
69# define call_sv perl_call_sv
70# endif
71# ifndef get_sv
72# define get_sv perl_get_sv
73# endif
74# ifndef get_cv
75# define get_cv perl_get_cv
76# endif
77# ifndef IS_PADGV
78# define IS_PADGV(v) 0
79# endif
80# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0
82# endif
83#endif
84
85/* 5.8.8 */
86#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0
88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
91#endif
92
93/* 5.11 */
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
97
98/* 5.8.7 */
99#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
102
103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
104# undef CORO_STACKGUARD
105#endif
106
107#ifndef CORO_STACKGUARD
108# define CORO_STACKGUARD 0
109#endif
110
111/* prefer perl internal functions over our own? */
112#ifndef CORO_PREFER_PERL_FUNCTIONS
113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
115
116/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */
77#define dSTACKLEVEL int stacklevel 118#define dSTACKLEVEL volatile char stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 119#define STACKLEVEL ((void *)&stacklevel)
79 120
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 122
82#if __GNUC__ >= 3 123#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
84#else 127#else
85# define attribute(x) 128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
86#endif 131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
87 135
88#define NOINLINE attribute ((noinline)) 136#define NOINLINE attribute ((noinline))
89 137
90#include "CoroAPI.h" 138#include "CoroAPI.h"
91
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93 139
94#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else 144#else
99# define LOCK (void)0 145# define LOCK (void)0
100# define UNLOCK (void)0 146# define UNLOCK (void)0
101#endif 147#endif
102 148
149/* helper storage struct for Coro::AIO */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157
158static size_t coro_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 162static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
164
165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
170
171/* async_pool helper stuff */
172static SV *sv_pool_rss;
173static SV *sv_pool_size;
174static AV *av_async_pool;
175
176/* Coro::AnyEvent */
177static SV *sv_activity;
107 178
108static struct coro_cctx *cctx_first; 179static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 180static int cctx_count, cctx_idle;
181
182enum {
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
110 190
111/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 192typedef struct coro_cctx {
113 struct coro_cctx *next; 193 struct coro_cctx *next;
114 194
115 /* the stack */ 195 /* the stack */
116 void *sptr; 196 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 197 size_t ssize;
118 198
119 /* cpu state */ 199 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 202 JMPENV *top_env;
122 coro_context cctx; 203 coro_context cctx;
123 204
124#if USE_VALGRIND 205#if CORO_USE_VALGRIND
125 int valgrind_id; 206 int valgrind_id;
126#endif 207#endif
208 unsigned char flags;
127} coro_cctx; 209} coro_cctx;
210
211enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216};
217
218/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct {
220 SV *defsv;
221 AV *defav;
222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
228
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
128 230
129/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
130struct coro { 232struct coro {
131 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the c coroutine allocated to this perl coroutine, if any */
132 coro_cctx *cctx; 234 coro_cctx *cctx;
133 235
134 /* data associated with this coroutine (initial args) */ 236 /* process data */
135 AV *args;
136 int refcnt;
137
138 /* optionally saved, might be zero */
139 AV *defav;
140 SV *defsv;
141 SV *errsv;
142
143 /* saved global state not related to stacks */
144 U8 dowarn;
145 I32 in_eval;
146
147 /* the stacks and related info (callchain etc..) */
148 PERL_SI *curstackinfo;
149 AV *curstack;
150 AV *mainstack; 237 AV *mainstack;
151 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
152 OP *op; 239
153 SV **curpad; 240 AV *args; /* data associated with this coroutine (initial args) */
154 AV *comppad; 241 int refcnt; /* coroutines are refcounted, yes */
155 CV *compcv; 242 int flags; /* CF_ flags */
156 SV **stack_base; 243 HV *hv; /* the perl hash associated with this coro, if any */
157 SV **stack_max; 244
158 SV **tmps_stack; 245 /* statistics */
159 I32 tmps_floor; 246 int usecount; /* number of transfers to this coro */
160 I32 tmps_ix;
161 I32 tmps_max;
162 I32 *markstack;
163 I32 *markstack_ptr;
164 I32 *markstack_max;
165 I32 *scopestack;
166 I32 scopestack_ix;
167 I32 scopestack_max;
168 ANY *savestack;
169 I32 savestack_ix;
170 I32 savestack_max;
171 OP **retstack;
172 I32 retstack_ix;
173 I32 retstack_max;
174 PMOP *curpm;
175 COP *curcop;
176 247
177 /* coro process data */ 248 /* coro process data */
178 int prio; 249 int prio;
250 SV *throw; /* exception to be thrown */
251
252 /* async_pool */
253 SV *saved_deffh;
254
255 /* linked list */
256 struct coro *next, *prev;
179}; 257};
180 258
181typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
182typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
183 261
262/** Coro ********************************************************************/
263
264#define PRIO_MAX 3
265#define PRIO_HIGH 1
266#define PRIO_NORMAL 0
267#define PRIO_LOW -1
268#define PRIO_IDLE -3
269#define PRIO_MIN -4
270
271/* for Coro.pm */
272static SV *coro_current;
273static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
275static int coro_nready;
276static struct coro *coro_first;
277
278/** lowlevel stuff **********************************************************/
279
280static SV *
281coro_get_sv (pTHX_ const char *name, int create)
282{
283#if PERL_VERSION_ATLEAST (5,10,0)
284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
285 get_sv (name, create);
286#endif
287 return get_sv (name, create);
288}
289
184static AV * 290static AV *
291coro_get_av (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_av (name, create);
296#endif
297 return get_av (name, create);
298}
299
300static HV *
301coro_get_hv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_hv (name, create);
306#endif
307 return get_hv (name, create);
308}
309
310static AV *
185coro_clone_padlist (CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
186{ 312{
187 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
188 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
189 315
190 newpadlist = newAV (); 316 newpadlist = newAV ();
191 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
192#if PERL_VERSION_ATLEAST (5,9,0) 318#if PERL_VERSION_ATLEAST (5,10,0)
193 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
194#else 320#else
195 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
196#endif 322#endif
197 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
… …
202 328
203 return newpadlist; 329 return newpadlist;
204} 330}
205 331
206static void 332static void
207free_padlist (AV *padlist) 333free_padlist (pTHX_ AV *padlist)
208{ 334{
209 /* may be during global destruction */ 335 /* may be during global destruction */
210 if (SvREFCNT (padlist)) 336 if (SvREFCNT (padlist))
211 { 337 {
212 I32 i = AvFILLp (padlist); 338 I32 i = AvFILLp (padlist);
… …
233 AV *padlist; 359 AV *padlist;
234 AV *av = (AV *)mg->mg_obj; 360 AV *av = (AV *)mg->mg_obj;
235 361
236 /* casting is fun. */ 362 /* casting is fun. */
237 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
238 free_padlist (padlist); 364 free_padlist (aTHX_ padlist);
239
240 SvREFCNT_dec (av);
241 365
242 return 0; 366 return 0;
243} 367}
244 368
245#define PERL_MAGIC_coro PERL_MAGIC_ext 369#define CORO_MAGIC_type_cv PERL_MAGIC_ext
370#define CORO_MAGIC_type_state PERL_MAGIC_ext
246 371
247static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 372static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0,
374 coro_cv_free
375};
376
377#define CORO_MAGIC(sv,type) \
378 SvMAGIC (sv) \
379 ? SvMAGIC (sv)->mg_type == type \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0
383
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
386
387static struct coro *
388SvSTATE_ (pTHX_ SV *coro)
389{
390 HV *stash;
391 MAGIC *mg;
392
393 if (SvROK (coro))
394 coro = SvRV (coro);
395
396 if (expect_false (SvTYPE (coro) != SVt_PVHV))
397 croak ("Coro::State object required");
398
399 stash = SvSTASH (coro);
400 if (expect_false (stash != coro_stash && stash != coro_state_stash))
401 {
402 /* very slow, but rare, check */
403 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
404 croak ("Coro::State object required");
405 }
406
407 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr;
409}
410
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
248 412
249/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
250static void 414static void
251get_padlist (CV *cv) 415get_padlist (pTHX_ CV *cv)
252{ 416{
253 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
254 419
255 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
256 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
257 else 422 else
258 { 423 {
259#if 0 424#if CORO_PREFER_PERL_FUNCTIONS
260 /* this is probably cleaner, but also slower? */ 425 /* this is probably cleaner, but also slower? */
261 CV *cp = Perl_cv_clone (cv); 426 CV *cp = Perl_cv_clone (cv);
262 CvPADLIST (cv) = CvPADLIST (cp); 427 CvPADLIST (cv) = CvPADLIST (cp);
263 CvPADLIST (cp) = 0; 428 CvPADLIST (cp) = 0;
264 SvREFCNT_dec (cp); 429 SvREFCNT_dec (cp);
265#else 430#else
266 CvPADLIST (cv) = coro_clone_padlist (cv); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
267#endif 432#endif
268 } 433 }
269} 434}
270 435
271static void 436static void
272put_padlist (CV *cv) 437put_padlist (pTHX_ CV *cv)
273{ 438{
274 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
275 441
276 if (!mg) 442 if (expect_false (!mg))
277 { 443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
278 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
279 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
280 mg->mg_virtual = &vtbl_coro;
281 mg->mg_obj = (SV *)newAV ();
282 }
283 444
284 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
285}
286 446
287#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
288#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
289 449
290#define LOAD(state) load_state((state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
291#define SAVE(state,flags) save_state((state),(flags)); 451}
292 452
293#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
294 454
295static void 455static void
296load_state(Coro__State c) 456load_perl (pTHX_ Coro__State c)
297{ 457{
298 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
299 PL_in_eval = c->in_eval; 459 c->slot = 0;
300 460
301 PL_curstackinfo = c->curstackinfo;
302 PL_curstack = c->curstack;
303 PL_mainstack = c->mainstack; 461 PL_mainstack = c->mainstack;
304 PL_stack_sp = c->stack_sp;
305 PL_op = c->op;
306 PL_curpad = c->curpad;
307 PL_comppad = c->comppad;
308 PL_compcv = c->compcv;
309 PL_stack_base = c->stack_base;
310 PL_stack_max = c->stack_max;
311 PL_tmps_stack = c->tmps_stack;
312 PL_tmps_floor = c->tmps_floor;
313 PL_tmps_ix = c->tmps_ix;
314 PL_tmps_max = c->tmps_max;
315 PL_markstack = c->markstack;
316 PL_markstack_ptr = c->markstack_ptr;
317 PL_markstack_max = c->markstack_max;
318 PL_scopestack = c->scopestack;
319 PL_scopestack_ix = c->scopestack_ix;
320 PL_scopestack_max = c->scopestack_max;
321 PL_savestack = c->savestack;
322 PL_savestack_ix = c->savestack_ix;
323 PL_savestack_max = c->savestack_max;
324#if !PERL_VERSION_ATLEAST (5,9,0)
325 PL_retstack = c->retstack;
326 PL_retstack_ix = c->retstack_ix;
327 PL_retstack_max = c->retstack_max;
328#endif
329 PL_curpm = c->curpm;
330 PL_curcop = c->curcop;
331 462
332 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
333 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
334 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 465 GvSV (PL_errgv) = slot->errsv;
466 GvSV (irsgv) = slot->irsgv;
467
468 #define VAR(name,type) PL_ ## name = slot->name;
469 # include "state.h"
470 #undef VAR
335 471
336 { 472 {
337 dSP; 473 dSP;
474
338 CV *cv; 475 CV *cv;
339 476
340 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
341 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
342 { 479 {
343 AV *padlist = (AV *)POPs;
344
345 if (padlist)
346 {
347 put_padlist (cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
348 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
349 } 482 CvPADLIST (cv) = (AV *)POPs;
350
351 ++CvDEPTH(cv);
352 } 483 }
353 484
354 PUTBACK; 485 PUTBACK;
355 } 486 }
356} 487}
357 488
358static void 489static void
359save_state(Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
360{ 491{
361 { 492 {
362 dSP; 493 dSP;
363 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
364 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
367 /* 498 /*
368 * the worst thing you can imagine happens first - we have to save 499 * the worst thing you can imagine happens first - we have to save
369 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
370 */ 501 */
371 502
372 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
373 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
374 for (;;) 505 for (;;)
375 { 506 {
376 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
377 { 508 {
378 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
379 510
380 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
381 { 512 {
382 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
383 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
384 { 516 {
385 EXTEND (SP, CvDEPTH(cv)*2); 517 EXTEND (SP, 3);
386
387 while (--CvDEPTH(cv))
388 {
389 /* this tells the restore code to increment CvDEPTH */
390 PUSHs (Nullsv);
391 PUSHs ((SV *)cv);
392 }
393
394 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
395 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
396 521
522 CvDEPTH (cv) = 0;
397 get_padlist (cv); 523 get_padlist (aTHX_ cv);
398 } 524 }
399 } 525 }
400#ifdef CXt_FORMAT
401 else if (CxTYPE(cx) == CXt_FORMAT)
402 {
403 /* I never used formats, so how should I know how these are implemented? */
404 /* my bold guess is as a simple, plain sub... */
405 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
406 }
407#endif
408 } 526 }
409 527
410 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
411 break; 529 break;
412 530
413 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
414 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
415 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
416 } 534 }
417 535
418 PUTBACK; 536 PUTBACK;
419 } 537 }
420 538
421 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
422 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
423 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 541 if (SLOT_COUNT >= 1) CXINC;
542 if (SLOT_COUNT >= 2) CXINC;
543 if (SLOT_COUNT >= 3) CXINC;
544 {
545 int i;
546 for (i = 3; i < SLOT_COUNT; ++i)
547 CXINC;
548 }
549 cxstack_ix -= SLOT_COUNT; /* undo allocation */
424 550
425 c->dowarn = PL_dowarn;
426 c->in_eval = PL_in_eval;
427
428 c->curstackinfo = PL_curstackinfo;
429 c->curstack = PL_curstack;
430 c->mainstack = PL_mainstack; 551 c->mainstack = PL_mainstack;
431 c->stack_sp = PL_stack_sp; 552
432 c->op = PL_op; 553 {
433 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
434 c->comppad = PL_comppad; 555
435 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
436 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
437 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
438 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
439 c->tmps_floor = PL_tmps_floor; 560
440 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
441 c->tmps_max = PL_tmps_max; 562 # include "state.h"
442 c->markstack = PL_markstack; 563 #undef VAR
443 c->markstack_ptr = PL_markstack_ptr; 564 }
444 c->markstack_max = PL_markstack_max;
445 c->scopestack = PL_scopestack;
446 c->scopestack_ix = PL_scopestack_ix;
447 c->scopestack_max = PL_scopestack_max;
448 c->savestack = PL_savestack;
449 c->savestack_ix = PL_savestack_ix;
450 c->savestack_max = PL_savestack_max;
451#if !PERL_VERSION_ATLEAST (5,9,0)
452 c->retstack = PL_retstack;
453 c->retstack_ix = PL_retstack_ix;
454 c->retstack_max = PL_retstack_max;
455#endif
456 c->curpm = PL_curpm;
457 c->curcop = PL_curcop;
458} 565}
459 566
460/* 567/*
461 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
463 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
464 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
465 */ 572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
466static void 576static void
467coro_init_stacks () 577coro_init_stacks (pTHX)
468{ 578{
469 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 579 PL_curstackinfo = new_stackinfo(32, 8);
470 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 583
474 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 587
478 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
479 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
481 PL_tmps_max = 96; 591 PL_tmps_max = 32;
482 592
483 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
486 596
487#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
488 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
489#endif 599#endif
490 600
491 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
492 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
493 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
494 604
495 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
496 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
497 PL_savestack_max = 96; 607 PL_savestack_max = 24;
498 608
499#if !PERL_VERSION_ATLEAST (5,9,0) 609#if !PERL_VERSION_ATLEAST (5,10,0)
500 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
501 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
502 PL_retstack_max = 8; 612 PL_retstack_max = 4;
503#endif 613#endif
504} 614}
615#endif
505 616
506/* 617/*
507 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
508 */ 619 */
509static void 620static void
510coro_destroy_stacks () 621coro_destroy_stacks (pTHX)
511{ 622{
512 if (!IN_DESTRUCT)
513 {
514 /* is this ugly, I ask? */
515 LEAVE_SCOPE (0);
516
517 /* sure it is, but more important: is it correct?? :/ */
518 FREETMPS;
519
520 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
521 }
522
523 while (PL_curstackinfo->si_next) 623 while (PL_curstackinfo->si_next)
524 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
525 625
526 while (PL_curstackinfo) 626 while (PL_curstackinfo)
527 { 627 {
528 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
529 629
530 { /*D*//*remove*/
531 dSP;
532 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
533 PUTBACK; /* possibly superfluous */
534 }
535
536 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
537 {
538 dounwind (-1);/*D*//*remove*/
539 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
540 }
541 632
542 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
543 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
544 PL_curstackinfo = p; 635 PL_curstackinfo = p;
545 } 636 }
546 637
547 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
548 Safefree (PL_markstack); 639 Safefree (PL_markstack);
549 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
550 Safefree (PL_savestack); 641 Safefree (PL_savestack);
551#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
552 Safefree (PL_retstack); 643 Safefree (PL_retstack);
553#endif 644#endif
554} 645}
555 646
647static size_t
648coro_rss (pTHX_ struct coro *coro)
649{
650 size_t rss = sizeof (*coro);
651
652 if (coro->mainstack)
653 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING)
658 {
659 slot = &tmp_slot;
660
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
664 }
665 else
666 slot = coro->slot;
667
668 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 }
680
681 return rss;
682}
683
684/** coroutine stack handling ************************************************/
685
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
688static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
689
690/* apparently < 5.8.8 */
691#undef MgPV_nolen_const
692#ifndef MgPV_nolen_const
693#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
694 SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
695 (const char*)(mg)->mg_ptr)
696#endif
697
698/*
699 * This overrides the default magic get method of %SIG elements.
700 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
701 * and instead of tryign to save and restore the hash elements, we just provide
702 * readback here.
703 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
704 * not expecting this to actually change the hook. This is a potential problem
705 * when a schedule happens then, but we ignore this.
706 */
707static int
708coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
709{
710 const char *s = MgPV_nolen_const (mg);
711
712 if (*s == '_')
713 {
714 SV **svp = 0;
715
716 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
717 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
718
719 if (svp)
720 {
721 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
722 return 0;
723 }
724 }
725
726 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
727}
728
729static int
730coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
731{
732 const char *s = MgPV_nolen_const (mg);
733
734 if (*s == '_')
735 {
736 SV **svp = 0;
737
738 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
739 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
740
741 if (svp)
742 {
743 SV *old = *svp;
744 *svp = 0;
745 SvREFCNT_dec (old);
746 return 0;
747 }
748 }
749
750 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
751}
752
753static int
754coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 SV *old = *svp;
768 *svp = newSVsv (sv);
769 SvREFCNT_dec (old);
770 return 0;
771 }
772 }
773
774 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
775}
776
556static void 777static void
557setup_coro (struct coro *coro) 778coro_setup (pTHX_ struct coro *coro)
558{ 779{
559 /* 780 /*
560 * emulate part of the perl startup here. 781 * emulate part of the perl startup here.
561 */ 782 */
562
563 coro_init_stacks (); 783 coro_init_stacks (aTHX);
564 784
785 PL_runops = RUNOPS_DEFAULT;
786 PL_curcop = &PL_compiling;
787 PL_in_eval = EVAL_NULL;
565 PL_curcop = 0; 788 PL_comppad = 0;
566 PL_in_eval = 0;
567 PL_curpm = 0; 789 PL_curpm = 0;
790 PL_curpad = 0;
791 PL_localizing = 0;
792 PL_dirty = 0;
793 PL_restartop = 0;
794#if PERL_VERSION_ATLEAST (5,10,0)
795 PL_parser = 0;
796#endif
797
798 /* recreate the die/warn hooks */
799 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
800 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
801
802 GvSV (PL_defgv) = newSV (0);
803 GvAV (PL_defgv) = coro->args; coro->args = 0;
804 GvSV (PL_errgv) = newSV (0);
805 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
806 PL_rs = newSVsv (GvSV (irsgv));
807 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
568 808
569 { 809 {
570 dSP; 810 dSP;
571 LOGOP myop; 811 LOGOP myop;
572 812
573 /* I have no idea why this is needed, but it is */
574 PUSHMARK (SP);
575
576 SvREFCNT_dec (GvAV (PL_defgv));
577 GvAV (PL_defgv) = coro->args; coro->args = 0;
578
579 Zero (&myop, 1, LOGOP); 813 Zero (&myop, 1, LOGOP);
580 myop.op_next = Nullop; 814 myop.op_next = Nullop;
581 myop.op_flags = OPf_WANT_VOID; 815 myop.op_flags = OPf_WANT_VOID;
582 816
817 PUSHMARK (SP);
818 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
819 PUTBACK;
583 PL_op = (OP *)&myop; 820 PL_op = (OP *)&myop;
584
585 PUSHMARK (SP);
586 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
587 PUTBACK;
588 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 821 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
589 SPAGAIN; 822 SPAGAIN;
590
591 ENTER; /* necessary e.g. for dounwind */
592 } 823 }
824
825 /* this newly created coroutine might be run on an existing cctx which most
826 * likely was suspended in set_stacklevel, called from entersub.
827 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
828 * so we ENTER here for symmetry
829 */
830 ENTER;
593} 831}
594 832
595static void 833static void
834coro_destroy (pTHX_ struct coro *coro)
835{
836 if (!IN_DESTRUCT)
837 {
838 /* restore all saved variables and stuff */
839 LEAVE_SCOPE (0);
840 assert (PL_tmps_floor == -1);
841
842 /* free all temporaries */
843 FREETMPS;
844 assert (PL_tmps_ix == -1);
845
846 /* unwind all extra stacks */
847 POPSTACK_TO (PL_mainstack);
848
849 /* unwind main stack */
850 dounwind (-1);
851 }
852
853 SvREFCNT_dec (GvSV (PL_defgv));
854 SvREFCNT_dec (GvAV (PL_defgv));
855 SvREFCNT_dec (GvSV (PL_errgv));
856 SvREFCNT_dec (PL_defoutgv);
857 SvREFCNT_dec (PL_rs);
858 SvREFCNT_dec (GvSV (irsgv));
859
860 SvREFCNT_dec (PL_diehook);
861 SvREFCNT_dec (PL_warnhook);
862
863 SvREFCNT_dec (coro->saved_deffh);
864 SvREFCNT_dec (coro->throw);
865
866 coro_destroy_stacks (aTHX);
867}
868
869static void
596free_coro_mortal () 870free_coro_mortal (pTHX)
597{ 871{
598 if (coro_mortal) 872 if (expect_true (coro_mortal))
599 { 873 {
600 SvREFCNT_dec (coro_mortal); 874 SvREFCNT_dec (coro_mortal);
601 coro_mortal = 0; 875 coro_mortal = 0;
602 } 876 }
603} 877}
604 878
879static int
880runops_trace (pTHX)
881{
882 COP *oldcop = 0;
883 int oldcxix = -2;
884 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
885 coro_cctx *cctx = coro->cctx;
886
887 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
888 {
889 PERL_ASYNC_CHECK ();
890
891 if (cctx->flags & CC_TRACE_ALL)
892 {
893 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
894 {
895 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
896 SV **bot, **top;
897 AV *av = newAV (); /* return values */
898 SV **cb;
899 dSP;
900
901 GV *gv = CvGV (cx->blk_sub.cv);
902 SV *fullname = sv_2mortal (newSV (0));
903 if (isGV (gv))
904 gv_efullname3 (fullname, gv, 0);
905
906 bot = PL_stack_base + cx->blk_oldsp + 1;
907 top = cx->blk_gimme == G_ARRAY ? SP + 1
908 : cx->blk_gimme == G_SCALAR ? bot + 1
909 : bot;
910
911 av_extend (av, top - bot);
912 while (bot < top)
913 av_push (av, SvREFCNT_inc (*bot++));
914
915 PL_runops = RUNOPS_DEFAULT;
916 ENTER;
917 SAVETMPS;
918 EXTEND (SP, 3);
919 PUSHMARK (SP);
920 PUSHs (&PL_sv_no);
921 PUSHs (fullname);
922 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
923 PUTBACK;
924 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
925 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
926 SPAGAIN;
927 FREETMPS;
928 LEAVE;
929 PL_runops = runops_trace;
930 }
931
932 if (oldcop != PL_curcop)
933 {
934 oldcop = PL_curcop;
935
936 if (PL_curcop != &PL_compiling)
937 {
938 SV **cb;
939
940 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
941 {
942 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
943
944 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
945 {
946 runops_proc_t old_runops = PL_runops;
947 dSP;
948 GV *gv = CvGV (cx->blk_sub.cv);
949 SV *fullname = sv_2mortal (newSV (0));
950
951 if (isGV (gv))
952 gv_efullname3 (fullname, gv, 0);
953
954 PL_runops = RUNOPS_DEFAULT;
955 ENTER;
956 SAVETMPS;
957 EXTEND (SP, 3);
958 PUSHMARK (SP);
959 PUSHs (&PL_sv_yes);
960 PUSHs (fullname);
961 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
962 PUTBACK;
963 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
964 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
965 SPAGAIN;
966 FREETMPS;
967 LEAVE;
968 PL_runops = runops_trace;
969 }
970
971 oldcxix = cxstack_ix;
972 }
973
974 if (cctx->flags & CC_TRACE_LINE)
975 {
976 dSP;
977
978 PL_runops = RUNOPS_DEFAULT;
979 ENTER;
980 SAVETMPS;
981 EXTEND (SP, 3);
982 PL_runops = RUNOPS_DEFAULT;
983 PUSHMARK (SP);
984 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
985 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
986 PUTBACK;
987 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
988 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
989 SPAGAIN;
990 FREETMPS;
991 LEAVE;
992 PL_runops = runops_trace;
993 }
994 }
995 }
996 }
997 }
998
999 TAINT_NOT;
1000 return 0;
1001}
1002
1003/* inject a fake call to Coro::State::_cctx_init into the execution */
1004/* _cctx_init should be careful, as it could be called at almost any time */
1005/* during execution of a perl program */
605static void NOINLINE 1006static void NOINLINE
606prepare_cctx (coro_cctx *cctx) 1007cctx_prepare (pTHX_ coro_cctx *cctx)
607{ 1008{
608 dSP; 1009 dSP;
609 LOGOP myop; 1010 LOGOP myop;
610 1011
1012 PL_top_env = &PL_start_env;
1013
1014 if (cctx->flags & CC_TRACE)
1015 PL_runops = runops_trace;
1016
611 Zero (&myop, 1, LOGOP); 1017 Zero (&myop, 1, LOGOP);
612 myop.op_next = PL_op; 1018 myop.op_next = PL_op;
613 myop.op_flags = OPf_WANT_VOID; 1019 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
614
615 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
616 1020
617 PUSHMARK (SP); 1021 PUSHMARK (SP);
1022 EXTEND (SP, 2);
1023 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
618 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1024 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
619 PUTBACK; 1025 PUTBACK;
1026 PL_op = (OP *)&myop;
620 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1027 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
621 SPAGAIN; 1028 SPAGAIN;
622} 1029}
623 1030
1031/*
1032 * this is a _very_ stripped down perl interpreter ;)
1033 */
624static void 1034static void
625coro_run (void *arg) 1035cctx_run (void *arg)
626{ 1036{
1037 dTHX;
1038
627 /* coro_run is the alternative epilogue of transfer() */ 1039 /* cctx_run is the alternative tail of transfer(), so unlock here. */
628 UNLOCK; 1040 UNLOCK;
629 1041
1042 /* we now skip the entersub that lead to transfer() */
1043 PL_op = PL_op->op_next;
1044
1045 /* inject a fake subroutine call to cctx_init */
1046 cctx_prepare (aTHX_ (coro_cctx *)arg);
1047
1048 /* somebody or something will hit me for both perl_run and PL_restartop */
1049 PL_restartop = PL_op;
1050 perl_run (PL_curinterp);
1051
630 /* 1052 /*
631 * this is a _very_ stripped down perl interpreter ;) 1053 * If perl-run returns we assume exit() was being called or the coro
1054 * fell off the end, which seems to be the only valid (non-bug)
1055 * reason for perl_run to return. We try to exit by jumping to the
1056 * bootstrap-time "top" top_env, as we cannot restore the "main"
1057 * coroutine as Coro has no such concept
632 */ 1058 */
633 PL_top_env = &PL_start_env; 1059 PL_top_env = main_top_env;
634 1060 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
635 /* inject call to cctx_init */
636 prepare_cctx ((coro_cctx *)arg);
637
638 /* somebody will hit me for both perl_run and PL_restartop */
639 perl_run (PL_curinterp);
640
641 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
642 abort ();
643} 1061}
644 1062
645static coro_cctx * 1063static coro_cctx *
646cctx_new () 1064cctx_new ()
647{ 1065{
648 coro_cctx *cctx; 1066 coro_cctx *cctx;
1067 void *stack_start;
1068 size_t stack_size;
649 1069
650 ++cctx_count; 1070 ++cctx_count;
651 1071
652 New (0, cctx, 1, coro_cctx); 1072 Newz (0, cctx, 1, coro_cctx);
653 1073
654#if HAVE_MMAP 1074#if HAVE_MMAP
655
656 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1075 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
657 /* mmap suppsedly does allocate-on-write for us */ 1076 /* mmap supposedly does allocate-on-write for us */
658 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1077 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659 1078
660 if (cctx->sptr == (void *)-1) 1079 if (cctx->sptr != (void *)-1)
661 {
662 perror ("FATAL: unable to mmap stack for coroutine");
663 _exit (EXIT_FAILURE);
664 } 1080 {
665
666# if STACKGUARD 1081# if CORO_STACKGUARD
667 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1082 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
668# endif 1083# endif
1084 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1085 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1086 cctx->flags |= CC_MAPPED;
1087 }
1088 else
1089#endif
1090 {
1091 cctx->ssize = coro_stacksize * (long)sizeof (long);
1092 New (0, cctx->sptr, coro_stacksize, long);
669 1093
670#else
671
672 cctx->ssize = STACKSIZE * (long)sizeof (long);
673 New (0, cctx->sptr, STACKSIZE, long);
674
675 if (!cctx->sptr) 1094 if (!cctx->sptr)
676 { 1095 {
677 perror ("FATAL: unable to malloc stack for coroutine"); 1096 perror ("FATAL: unable to allocate stack for coroutine");
678 _exit (EXIT_FAILURE); 1097 _exit (EXIT_FAILURE);
679 } 1098 }
680 1099
681#endif 1100 stack_start = cctx->sptr;
1101 stack_size = cctx->ssize;
1102 }
682 1103
683#if USE_VALGRIND 1104 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
684 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1105 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
685 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
686 cctx->ssize + (char *)cctx->sptr
687 );
688#endif
689
690 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
691 1106
692 return cctx; 1107 return cctx;
693} 1108}
694 1109
695static void 1110static void
696cctx_free (coro_cctx *cctx) 1111cctx_destroy (coro_cctx *cctx)
697{ 1112{
698 if (!cctx) 1113 if (!cctx)
699 return; 1114 return;
700 1115
701 --cctx_count; 1116 --cctx_count;
702 1117
703#if USE_VALGRIND 1118#if CORO_USE_VALGRIND
704 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1119 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
705#endif 1120#endif
706 1121
707#if HAVE_MMAP 1122#if HAVE_MMAP
1123 if (cctx->flags & CC_MAPPED)
708 munmap (cctx->sptr, cctx->ssize); 1124 munmap (cctx->sptr, cctx->ssize);
709#else 1125 else
1126#endif
710 Safefree (cctx->sptr); 1127 Safefree (cctx->sptr);
711#endif
712 1128
713 Safefree (cctx); 1129 Safefree (cctx);
714} 1130}
715 1131
1132/* wether this cctx should be destructed */
1133#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1134
716static coro_cctx * 1135static coro_cctx *
717cctx_get () 1136cctx_get (pTHX)
718{ 1137{
719 coro_cctx *cctx; 1138 while (expect_true (cctx_first))
720
721 if (cctx_first)
722 { 1139 {
1140 coro_cctx *cctx = cctx_first;
1141 cctx_first = cctx->next;
723 --cctx_idle; 1142 --cctx_idle;
724 cctx = cctx_first; 1143
725 cctx_first = cctx->next; 1144 if (expect_true (!CCTX_EXPIRED (cctx)))
726 } 1145 return cctx;
727 else 1146
728 { 1147 cctx_destroy (cctx);
729 cctx = cctx_new ();
730 PL_op = PL_op->op_next;
731 } 1148 }
732 1149
733 return cctx; 1150 return cctx_new ();
734} 1151}
735 1152
736static void 1153static void
737cctx_put (coro_cctx *cctx) 1154cctx_put (coro_cctx *cctx)
738{ 1155{
1156 /* free another cctx if overlimit */
1157 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1158 {
1159 coro_cctx *first = cctx_first;
1160 cctx_first = first->next;
1161 --cctx_idle;
1162
1163 cctx_destroy (first);
1164 }
1165
739 ++cctx_idle; 1166 ++cctx_idle;
740 cctx->next = cctx_first; 1167 cctx->next = cctx_first;
741 cctx_first = cctx; 1168 cctx_first = cctx;
742} 1169}
743 1170
744/* never call directly, always through the coro_state_transfer global variable */ 1171/** coroutine switching *****************************************************/
1172
1173static void
1174transfer_check (pTHX_ struct coro *prev, struct coro *next)
1175{
1176 if (expect_true (prev != next))
1177 {
1178 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1179 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1180
1181 if (expect_false (next->flags & CF_RUNNING))
1182 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1183
1184 if (expect_false (next->flags & CF_DESTROYED))
1185 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1186
1187#if !PERL_VERSION_ATLEAST (5,10,0)
1188 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1189 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1190#endif
1191 }
1192}
1193
1194/* always use the TRANSFER macro */
745static void NOINLINE 1195static void NOINLINE
746transfer (struct coro *prev, struct coro *next, int flags) 1196transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
747{ 1197{
748 dSTACKLEVEL; 1198 dSTACKLEVEL;
1199 static volatile int has_throw;
749 1200
750 /* sometimes transfer is only called to set idle_sp */ 1201 /* sometimes transfer is only called to set idle_sp */
751 if (flags == TRANSFER_SET_STACKLEVEL) 1202 if (expect_false (!next))
1203 {
752 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1204 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1205 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1206 }
753 else if (prev != next) 1207 else if (expect_true (prev != next))
754 { 1208 {
755 coro_cctx *prev__cctx; 1209 coro_cctx *prev__cctx;
756 1210
1211 if (expect_false (prev->flags & CF_NEW))
1212 {
1213 /* create a new empty context */
1214 Newz (0, prev->cctx, 1, coro_cctx);
1215 prev->flags &= ~CF_NEW;
1216 prev->flags |= CF_RUNNING;
1217 }
1218
1219 prev->flags &= ~CF_RUNNING;
1220 next->flags |= CF_RUNNING;
1221
757 LOCK; 1222 LOCK;
758 1223
759 if (next->mainstack) 1224 /* first get rid of the old state */
1225 save_perl (aTHX_ prev);
1226
1227 if (expect_false (next->flags & CF_NEW))
760 { 1228 {
761 /* coroutine already started */ 1229 /* need to start coroutine */
762 SAVE (prev, flags); 1230 next->flags &= ~CF_NEW;
763 LOAD (next); 1231 /* setup coroutine call */
1232 coro_setup (aTHX_ next);
764 } 1233 }
765 else 1234 else
1235 load_perl (aTHX_ next);
1236
1237 prev__cctx = prev->cctx;
1238
1239 /* possibly "free" the cctx */
1240 if (expect_true (
1241 prev__cctx->idle_sp == STACKLEVEL
1242 && !(prev__cctx->flags & CC_TRACE)
1243 && !force_cctx
1244 ))
766 { 1245 {
767 /* need to start coroutine */ 1246 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
768 /* first get rid of the old state */ 1247 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
769 SAVE (prev, -1); 1248
770 /* setup coroutine call */
771 setup_coro (next);
772 /* need a stack */
773 next->cctx = 0; 1249 prev->cctx = 0;
1250
1251 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1252 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1253 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1254 if (!next->cctx)
1255 next->cctx = cctx_get (aTHX);
1256
1257 cctx_put (prev__cctx);
774 } 1258 }
775 1259
776 if (!prev->cctx) 1260 ++next->usecount;
777 /* create a new empty context */
778 Newz (0, prev->cctx, 1, coro_cctx);
779 1261
780 prev__cctx = prev->cctx;
781
782 /* possibly "free" the cctx */
783 if (prev__cctx->idle_sp == STACKLEVEL)
784 {
785 cctx_put (prev__cctx);
786 prev->cctx = 0;
787 }
788
789 if (!next->cctx) 1262 if (expect_true (!next->cctx))
790 next->cctx = cctx_get (); 1263 next->cctx = cctx_get (aTHX);
791 1264
1265 has_throw = !!next->throw;
1266
792 if (prev__cctx != next->cctx) 1267 if (expect_false (prev__cctx != next->cctx))
793 { 1268 {
794 prev__cctx->top_env = PL_top_env; 1269 prev__cctx->top_env = PL_top_env;
795 PL_top_env = next->cctx->top_env; 1270 PL_top_env = next->cctx->top_env;
796 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1271 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
797 } 1272 }
798 1273
799 free_coro_mortal (); 1274 free_coro_mortal (aTHX);
800
801 UNLOCK; 1275 UNLOCK;
1276
1277 if (expect_false (has_throw))
1278 {
1279 struct coro *coro = SvSTATE (coro_current);
1280
1281 if (coro->throw)
1282 {
1283 SV *exception = coro->throw;
1284 coro->throw = 0;
1285 sv_setsv (ERRSV, exception);
1286 croak (0);
1287 }
1288 }
802 } 1289 }
803} 1290}
804 1291
805struct transfer_args 1292struct transfer_args
806{ 1293{
807 struct coro *prev, *next; 1294 struct coro *prev, *next;
808 int flags;
809}; 1295};
810 1296
1297#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
811#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1298#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
812 1299
1300/** high level stuff ********************************************************/
1301
813static void 1302static int
814coro_state_destroy (struct coro *coro) 1303coro_state_destroy (pTHX_ struct coro *coro)
815{ 1304{
816 if (coro->refcnt--) 1305 if (coro->flags & CF_DESTROYED)
817 return; 1306 return 0;
1307
1308 coro->flags |= CF_DESTROYED;
1309
1310 if (coro->flags & CF_READY)
1311 {
1312 /* reduce nready, as destroying a ready coro effectively unreadies it */
1313 /* alternative: look through all ready queues and remove the coro */
1314 LOCK;
1315 --coro_nready;
1316 UNLOCK;
1317 }
1318 else
1319 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
818 1320
819 if (coro->mainstack && coro->mainstack != main_mainstack) 1321 if (coro->mainstack && coro->mainstack != main_mainstack)
820 { 1322 {
821 struct coro temp; 1323 struct coro temp;
822 1324
823 SAVE ((&temp), TRANSFER_SAVE_ALL); 1325 if (coro->flags & CF_RUNNING)
824 LOAD (coro); 1326 croak ("FATAL: tried to destroy currently running coroutine");
825 1327
826 coro_destroy_stacks (); 1328 save_perl (aTHX_ &temp);
1329 load_perl (aTHX_ coro);
827 1330
828 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1331 coro_destroy (aTHX_ coro);
829 1332
1333 load_perl (aTHX_ &temp);
1334
830 coro->mainstack = 0; 1335 coro->slot = 0;
831 } 1336 }
832 1337
833 cctx_free (coro->cctx); 1338 cctx_destroy (coro->cctx);
834 SvREFCNT_dec (coro->args); 1339 SvREFCNT_dec (coro->args);
835 Safefree (coro); 1340
1341 if (coro->next) coro->next->prev = coro->prev;
1342 if (coro->prev) coro->prev->next = coro->next;
1343 if (coro == coro_first) coro_first = coro->next;
1344
1345 return 1;
836} 1346}
837 1347
838static int 1348static int
839coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1349coro_state_free (pTHX_ SV *sv, MAGIC *mg)
840{ 1350{
841 struct coro *coro = (struct coro *)mg->mg_ptr; 1351 struct coro *coro = (struct coro *)mg->mg_ptr;
842 mg->mg_ptr = 0; 1352 mg->mg_ptr = 0;
843 1353
1354 coro->hv = 0;
1355
1356 if (--coro->refcnt < 0)
1357 {
844 coro_state_destroy (coro); 1358 coro_state_destroy (aTHX_ coro);
1359 Safefree (coro);
1360 }
845 1361
846 return 0; 1362 return 0;
847} 1363}
848 1364
849static int 1365static int
… …
856 return 0; 1372 return 0;
857} 1373}
858 1374
859static MGVTBL coro_state_vtbl = { 1375static MGVTBL coro_state_vtbl = {
860 0, 0, 0, 0, 1376 0, 0, 0, 0,
861 coro_state_clear, 1377 coro_state_free,
862 0, 1378 0,
863#ifdef MGf_DUP 1379#ifdef MGf_DUP
864 coro_state_dup, 1380 coro_state_dup,
865#else 1381#else
866# define MGf_DUP 0 1382# define MGf_DUP 0
867#endif 1383#endif
868}; 1384};
869 1385
870static struct coro *
871SvSTATE (SV *coro)
872{
873 HV *stash;
874 MAGIC *mg;
875
876 if (SvROK (coro))
877 coro = SvRV (coro);
878
879 stash = SvSTASH (coro);
880 if (stash != coro_stash && stash != coro_state_stash)
881 {
882 /* very slow, but rare, check */
883 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
884 croak ("Coro::State object required");
885 }
886
887 mg = SvMAGIC (coro);
888 assert (mg->mg_type == PERL_MAGIC_ext);
889 return (struct coro *)mg->mg_ptr;
890}
891
892static void 1386static void
893prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1387prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
894{ 1388{
895 ta->prev = SvSTATE (prev); 1389 ta->prev = SvSTATE (prev_sv);
896 ta->next = SvSTATE (next); 1390 ta->next = SvSTATE (next_sv);
897 ta->flags = flags; 1391 TRANSFER_CHECK (*ta);
898} 1392}
899 1393
900static void 1394static void
901api_transfer (SV *prev, SV *next, int flags) 1395api_transfer (SV *prev_sv, SV *next_sv)
902{ 1396{
903 dTHX; 1397 dTHX;
904 struct transfer_args ta; 1398 struct transfer_args ta;
905 1399
906 prepare_transfer (&ta, prev, next, flags); 1400 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
907 TRANSFER (ta); 1401 TRANSFER (ta, 1);
908} 1402}
909 1403
910/** Coro ********************************************************************/ 1404/** Coro ********************************************************************/
911 1405
912#define PRIO_MAX 3
913#define PRIO_HIGH 1
914#define PRIO_NORMAL 0
915#define PRIO_LOW -1
916#define PRIO_IDLE -3
917#define PRIO_MIN -4
918
919/* for Coro.pm */
920static GV *coro_current, *coro_idle;
921static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
922static int coro_nready;
923
924static void 1406static void
925coro_enq (SV *sv) 1407coro_enq (pTHX_ SV *coro_sv)
1408{
1409 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1410}
1411
1412static SV *
1413coro_deq (pTHX)
926{ 1414{
927 int prio; 1415 int prio;
928 1416
929 if (SvTYPE (sv) != SVt_PVHV)
930 croak ("Coro::ready tried to enqueue something that is not a coroutine");
931
932 prio = SvSTATE (sv)->prio;
933
934 av_push (coro_ready [prio - PRIO_MIN], sv);
935 coro_nready++;
936}
937
938static SV *
939coro_deq (int min_prio)
940{
941 int prio = PRIO_MAX - PRIO_MIN;
942
943 min_prio -= PRIO_MIN;
944 if (min_prio < 0)
945 min_prio = 0;
946
947 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1417 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
948 if (AvFILLp (coro_ready [prio]) >= 0) 1418 if (AvFILLp (coro_ready [prio]) >= 0)
949 {
950 coro_nready--;
951 return av_shift (coro_ready [prio]); 1419 return av_shift (coro_ready [prio]);
952 }
953 1420
954 return 0; 1421 return 0;
955} 1422}
956 1423
1424static int
1425api_ready (SV *coro_sv)
1426{
1427 dTHX;
1428 struct coro *coro;
1429 SV *sv_hook;
1430 void (*xs_hook)(void);
1431
1432 if (SvROK (coro_sv))
1433 coro_sv = SvRV (coro_sv);
1434
1435 coro = SvSTATE (coro_sv);
1436
1437 if (coro->flags & CF_READY)
1438 return 0;
1439
1440 coro->flags |= CF_READY;
1441
1442 LOCK;
1443
1444 sv_hook = coro_nready ? 0 : coro_readyhook;
1445 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1446
1447 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1448 ++coro_nready;
1449
1450 UNLOCK;
1451
1452 if (sv_hook)
1453 {
1454 dSP;
1455
1456 ENTER;
1457 SAVETMPS;
1458
1459 PUSHMARK (SP);
1460 PUTBACK;
1461 call_sv (sv_hook, G_DISCARD);
1462 SPAGAIN;
1463
1464 FREETMPS;
1465 LEAVE;
1466 }
1467
1468 if (xs_hook)
1469 xs_hook ();
1470
1471 return 1;
1472}
1473
1474static int
1475api_is_ready (SV *coro_sv)
1476{
1477 dTHX;
1478 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1479}
1480
957static void 1481static void
958api_ready (SV *coro) 1482prepare_schedule (pTHX_ struct transfer_args *ta)
959{ 1483{
960 dTHX; 1484 SV *prev_sv, *next_sv;
961 1485
962 if (SvROK (coro)) 1486 for (;;)
963 coro = SvRV (coro); 1487 {
1488 LOCK;
1489 next_sv = coro_deq (aTHX);
1490
1491 /* nothing to schedule: call the idle handler */
1492 if (expect_false (!next_sv))
1493 {
1494 dSP;
1495 UNLOCK;
1496
1497 ENTER;
1498 SAVETMPS;
1499
1500 PUSHMARK (SP);
1501 PUTBACK;
1502 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1503 SPAGAIN;
1504
1505 FREETMPS;
1506 LEAVE;
1507 continue;
1508 }
1509
1510 ta->next = SvSTATE (next_sv);
1511
1512 /* cannot transfer to destroyed coros, skip and look for next */
1513 if (expect_false (ta->next->flags & CF_DESTROYED))
1514 {
1515 UNLOCK;
1516 SvREFCNT_dec (next_sv);
1517 /* coro_nready is already taken care of by destroy */
1518 continue;
1519 }
1520
1521 --coro_nready;
1522 UNLOCK;
1523 break;
1524 }
1525
1526 /* free this only after the transfer */
1527 prev_sv = SvRV (coro_current);
1528 ta->prev = SvSTATE (prev_sv);
1529 TRANSFER_CHECK (*ta);
1530 assert (ta->next->flags & CF_READY);
1531 ta->next->flags &= ~CF_READY;
1532 SvRV_set (coro_current, next_sv);
964 1533
965 LOCK; 1534 LOCK;
966 coro_enq (SvREFCNT_inc (coro)); 1535 free_coro_mortal (aTHX);
1536 coro_mortal = prev_sv;
967 UNLOCK; 1537 UNLOCK;
968} 1538}
969 1539
970static void 1540static void
971prepare_schedule (struct transfer_args *ta)
972{
973 SV *current, *prev, *next;
974
975 current = GvSV (coro_current);
976
977 for (;;)
978 {
979 LOCK;
980 next = coro_deq (PRIO_MIN);
981 UNLOCK;
982
983 if (next)
984 break;
985
986 {
987 dSP;
988
989 ENTER;
990 SAVETMPS;
991
992 PUSHMARK (SP);
993 PUTBACK;
994 call_sv (GvSV (coro_idle), G_DISCARD);
995
996 FREETMPS;
997 LEAVE;
998 }
999 }
1000
1001 prev = SvRV (current);
1002 SvRV (current) = next;
1003
1004 /* free this only after the transfer */
1005 LOCK;
1006 free_coro_mortal ();
1007 UNLOCK;
1008 coro_mortal = prev;
1009
1010 ta->prev = SvSTATE (prev);
1011 ta->next = SvSTATE (next);
1012 ta->flags = TRANSFER_SAVE_ALL;
1013}
1014
1015static void
1016prepare_cede (struct transfer_args *ta) 1541prepare_cede (pTHX_ struct transfer_args *ta)
1017{ 1542{
1018 LOCK; 1543 api_ready (coro_current);
1019 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1020 UNLOCK;
1021
1022 prepare_schedule (ta); 1544 prepare_schedule (aTHX_ ta);
1545}
1546
1547static int
1548prepare_cede_notself (pTHX_ struct transfer_args *ta)
1549{
1550 if (coro_nready)
1551 {
1552 SV *prev = SvRV (coro_current);
1553 prepare_schedule (aTHX_ ta);
1554 api_ready (prev);
1555 return 1;
1556 }
1557 else
1558 return 0;
1023} 1559}
1024 1560
1025static void 1561static void
1026api_schedule (void) 1562api_schedule (void)
1027{ 1563{
1028 dTHX; 1564 dTHX;
1029 struct transfer_args ta; 1565 struct transfer_args ta;
1030 1566
1031 prepare_schedule (&ta); 1567 prepare_schedule (aTHX_ &ta);
1032 TRANSFER (ta); 1568 TRANSFER (ta, 1);
1033} 1569}
1034 1570
1035static void 1571static int
1036api_cede (void) 1572api_cede (void)
1037{ 1573{
1038 dTHX; 1574 dTHX;
1039 struct transfer_args ta; 1575 struct transfer_args ta;
1040 1576
1041 prepare_cede (&ta); 1577 prepare_cede (aTHX_ &ta);
1578
1579 if (expect_true (ta.prev != ta.next))
1580 {
1042 TRANSFER (ta); 1581 TRANSFER (ta, 1);
1582 return 1;
1583 }
1584 else
1585 return 0;
1043} 1586}
1044 1587
1588static int
1589api_cede_notself (void)
1590{
1591 dTHX;
1592 struct transfer_args ta;
1593
1594 if (prepare_cede_notself (aTHX_ &ta))
1595 {
1596 TRANSFER (ta, 1);
1597 return 1;
1598 }
1599 else
1600 return 0;
1601}
1602
1603static void
1604api_trace (SV *coro_sv, int flags)
1605{
1606 dTHX;
1607 struct coro *coro = SvSTATE (coro_sv);
1608
1609 if (flags & CC_TRACE)
1610 {
1611 if (!coro->cctx)
1612 coro->cctx = cctx_new ();
1613 else if (!(coro->cctx->flags & CC_TRACE))
1614 croak ("cannot enable tracing on coroutine with custom stack");
1615
1616 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1617 }
1618 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1619 {
1620 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1621
1622 if (coro->flags & CF_RUNNING)
1623 PL_runops = RUNOPS_DEFAULT;
1624 else
1625 coro->slot->runops = RUNOPS_DEFAULT;
1626 }
1627}
1628
1045MODULE = Coro::State PACKAGE = Coro::State 1629MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1046 1630
1047PROTOTYPES: DISABLE 1631PROTOTYPES: DISABLE
1048 1632
1049BOOT: 1633BOOT:
1050{ 1634{
1051#ifdef USE_ITHREADS 1635#ifdef USE_ITHREADS
1052 MUTEX_INIT (&coro_mutex); 1636 MUTEX_INIT (&coro_mutex);
1053#endif 1637#endif
1054 BOOT_PAGESIZE; 1638 BOOT_PAGESIZE;
1055 1639
1640 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1641 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1642
1643 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1644 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1645 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1646
1647 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1648 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1649 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1650
1056 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1651 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1057 1652
1058 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1653 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1059 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1654 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1060 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1655 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1656 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1061 1657
1062 main_mainstack = PL_mainstack; 1658 main_mainstack = PL_mainstack;
1659 main_top_env = PL_top_env;
1063 1660
1661 while (main_top_env->je_prev)
1662 main_top_env = main_top_env->je_prev;
1663
1064 coroapi.ver = CORO_API_VERSION; 1664 coroapi.ver = CORO_API_VERSION;
1665 coroapi.rev = CORO_API_REVISION;
1065 coroapi.transfer = api_transfer; 1666 coroapi.transfer = api_transfer;
1066 1667
1067 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1668 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1068} 1669}
1069 1670
1070SV * 1671SV *
1071new (char *klass, ...) 1672new (char *klass, ...)
1072 CODE: 1673 CODE:
1073{ 1674{
1074 struct coro *coro; 1675 struct coro *coro;
1676 MAGIC *mg;
1075 HV *hv; 1677 HV *hv;
1076 int i; 1678 int i;
1077 1679
1078 Newz (0, coro, 1, struct coro); 1680 Newz (0, coro, 1, struct coro);
1079 coro->args = newAV (); 1681 coro->args = newAV ();
1682 coro->flags = CF_NEW;
1080 1683
1684 if (coro_first) coro_first->prev = coro;
1685 coro->next = coro_first;
1686 coro_first = coro;
1687
1081 hv = newHV (); 1688 coro->hv = hv = newHV ();
1082 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1689 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1690 mg->mg_flags |= MGf_DUP;
1083 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1691 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1084 1692
1693 av_extend (coro->args, items - 1);
1085 for (i = 1; i < items; i++) 1694 for (i = 1; i < items; i++)
1086 av_push (coro->args, newSVsv (ST (i))); 1695 av_push (coro->args, newSVsv (ST (i)));
1087} 1696}
1088 OUTPUT: 1697 OUTPUT:
1089 RETVAL 1698 RETVAL
1090 1699
1700# these not obviously related functions are all rolled into the same xs
1701# function to increase chances that they all will call transfer with the same
1702# stack offset
1091void 1703void
1092_set_stacklevel (...) 1704_set_stacklevel (...)
1093 ALIAS: 1705 ALIAS:
1094 Coro::State::transfer = 1 1706 Coro::State::transfer = 1
1095 Coro::schedule = 2 1707 Coro::schedule = 2
1096 Coro::cede = 3 1708 Coro::cede = 3
1097 Coro::Cont::yield = 4 1709 Coro::cede_notself = 4
1098 CODE: 1710 CODE:
1099{ 1711{
1100 struct transfer_args ta; 1712 struct transfer_args ta;
1101 1713
1714 PUTBACK;
1102 switch (ix) 1715 switch (ix)
1103 { 1716 {
1104 case 0: 1717 case 0:
1105 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 1718 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1106 ta.next = 0; 1719 ta.next = 0;
1107 ta.flags = TRANSFER_SET_STACKLEVEL;
1108 break; 1720 break;
1109 1721
1110 case 1: 1722 case 1:
1111 if (items != 3) 1723 if (items != 2)
1112 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1724 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1113 1725
1114 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1726 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1115 break; 1727 break;
1116 1728
1117 case 2: 1729 case 2:
1118 prepare_schedule (&ta); 1730 prepare_schedule (aTHX_ &ta);
1119 break; 1731 break;
1120 1732
1121 case 3: 1733 case 3:
1122 prepare_cede (&ta); 1734 prepare_cede (aTHX_ &ta);
1123 break; 1735 break;
1124 1736
1125 case 4: 1737 case 4:
1126 { 1738 if (!prepare_cede_notself (aTHX_ &ta))
1127 SV *yieldstack; 1739 XSRETURN_EMPTY;
1128 SV *sv;
1129 AV *defav = GvAV (PL_defgv);
1130 1740
1131 yieldstack = *hv_fetch (
1132 (HV *)SvRV (GvSV (coro_current)),
1133 "yieldstack", sizeof ("yieldstack") - 1,
1134 0
1135 );
1136
1137 /* set up @_ -- ugly */
1138 av_clear (defav);
1139 av_fill (defav, items - 1);
1140 while (items--)
1141 av_store (defav, items, SvREFCNT_inc (ST(items)));
1142
1143 sv = av_pop ((AV *)SvRV (yieldstack));
1144 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1145 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1146 ta.flags = 0;
1147 SvREFCNT_dec (sv);
1148 }
1149 break; 1741 break;
1150
1151 } 1742 }
1743 SPAGAIN;
1152 1744
1745 BARRIER;
1746 PUTBACK;
1153 TRANSFER (ta); 1747 TRANSFER (ta, 0);
1748 SPAGAIN; /* might be the sp of a different coroutine now */
1749 /* be extra careful not to ever do anything after TRANSFER */
1154} 1750}
1751
1752bool
1753_destroy (SV *coro_sv)
1754 CODE:
1755 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1756 OUTPUT:
1757 RETVAL
1155 1758
1156void 1759void
1157_clone_state_from (SV *dst, SV *src)
1158 CODE:
1159{
1160 struct coro *coro_src = SvSTATE (src);
1161
1162 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1163
1164 ++coro_src->refcnt;
1165 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1166}
1167
1168void
1169_exit (code) 1760_exit (int code)
1170 int code
1171 PROTOTYPE: $ 1761 PROTOTYPE: $
1172 CODE: 1762 CODE:
1173 _exit (code); 1763 _exit (code);
1764
1765int
1766cctx_stacksize (int new_stacksize = 0)
1767 CODE:
1768 RETVAL = coro_stacksize;
1769 if (new_stacksize)
1770 coro_stacksize = new_stacksize;
1771 OUTPUT:
1772 RETVAL
1174 1773
1175int 1774int
1176cctx_count () 1775cctx_count ()
1177 CODE: 1776 CODE:
1178 RETVAL = cctx_count; 1777 RETVAL = cctx_count;
… …
1184 CODE: 1783 CODE:
1185 RETVAL = cctx_idle; 1784 RETVAL = cctx_idle;
1186 OUTPUT: 1785 OUTPUT:
1187 RETVAL 1786 RETVAL
1188 1787
1788void
1789list ()
1790 PPCODE:
1791{
1792 struct coro *coro;
1793 for (coro = coro_first; coro; coro = coro->next)
1794 if (coro->hv)
1795 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1796}
1797
1798void
1799call (Coro::State coro, SV *coderef)
1800 ALIAS:
1801 eval = 1
1802 CODE:
1803{
1804 if (coro->mainstack)
1805 {
1806 struct coro temp;
1807
1808 if (!(coro->flags & CF_RUNNING))
1809 {
1810 PUTBACK;
1811 save_perl (aTHX_ &temp);
1812 load_perl (aTHX_ coro);
1813 }
1814
1815 {
1816 dSP;
1817 ENTER;
1818 SAVETMPS;
1819 PUTBACK;
1820 PUSHSTACK;
1821 PUSHMARK (SP);
1822
1823 if (ix)
1824 eval_sv (coderef, 0);
1825 else
1826 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1827
1828 POPSTACK;
1829 SPAGAIN;
1830 FREETMPS;
1831 LEAVE;
1832 PUTBACK;
1833 }
1834
1835 if (!(coro->flags & CF_RUNNING))
1836 {
1837 save_perl (aTHX_ coro);
1838 load_perl (aTHX_ &temp);
1839 SPAGAIN;
1840 }
1841 }
1842}
1843
1844SV *
1845is_ready (Coro::State coro)
1846 PROTOTYPE: $
1847 ALIAS:
1848 is_ready = CF_READY
1849 is_running = CF_RUNNING
1850 is_new = CF_NEW
1851 is_destroyed = CF_DESTROYED
1852 CODE:
1853 RETVAL = boolSV (coro->flags & ix);
1854 OUTPUT:
1855 RETVAL
1856
1857void
1858api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1859
1860SV *
1861has_cctx (Coro::State coro)
1862 PROTOTYPE: $
1863 CODE:
1864 RETVAL = boolSV (!!coro->cctx);
1865 OUTPUT:
1866 RETVAL
1867
1868int
1869is_traced (Coro::State coro)
1870 PROTOTYPE: $
1871 CODE:
1872 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1873 OUTPUT:
1874 RETVAL
1875
1876IV
1877rss (Coro::State coro)
1878 PROTOTYPE: $
1879 ALIAS:
1880 usecount = 1
1881 CODE:
1882 switch (ix)
1883 {
1884 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1885 case 1: RETVAL = coro->usecount; break;
1886 }
1887 OUTPUT:
1888 RETVAL
1889
1890void
1891force_cctx ()
1892 CODE:
1893 struct coro *coro = SvSTATE (coro_current);
1894 coro->cctx->idle_sp = 0;
1895
1189MODULE = Coro::State PACKAGE = Coro 1896MODULE = Coro::State PACKAGE = Coro
1190 1897
1191BOOT: 1898BOOT:
1192{ 1899{
1193 int i; 1900 int i;
1194 1901
1902 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1903 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1904 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1905
1906 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1907 SvREADONLY_on (coro_current);
1908
1195 coro_stash = gv_stashpv ("Coro", TRUE); 1909 coro_stash = gv_stashpv ("Coro", TRUE);
1196 1910
1197 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1911 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1198 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1912 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1199 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1913 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1200 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1914 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1201 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1915 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1202 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1916 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1203 1917
1204 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1205 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1206
1207 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1918 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1208 coro_ready[i] = newAV (); 1919 coro_ready[i] = newAV ();
1209 1920
1210 { 1921 {
1211 SV *sv = perl_get_sv("Coro::API", 1); 1922 SV *sv = perl_get_sv ("Coro::API", TRUE);
1923 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1212 1924
1213 coroapi.schedule = api_schedule; 1925 coroapi.schedule = api_schedule;
1214 coroapi.cede = api_cede; 1926 coroapi.cede = api_cede;
1927 coroapi.cede_notself = api_cede_notself;
1215 coroapi.ready = api_ready; 1928 coroapi.ready = api_ready;
1929 coroapi.is_ready = api_is_ready;
1216 coroapi.nready = &coro_nready; 1930 coroapi.nready = &coro_nready;
1217 coroapi.current = coro_current; 1931 coroapi.current = coro_current;
1218 1932
1219 GCoroAPI = &coroapi; 1933 GCoroAPI = &coroapi;
1220 sv_setiv (sv, (IV)&coroapi); 1934 sv_setiv (sv, (IV)&coroapi);
1221 SvREADONLY_on (sv); 1935 SvREADONLY_on (sv);
1222 } 1936 }
1223} 1937}
1938
1939void
1940_set_current (SV *current)
1941 PROTOTYPE: $
1942 CODE:
1943 SvREFCNT_dec (SvRV (coro_current));
1944 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1945
1946void
1947_set_readyhook (SV *hook)
1948 PROTOTYPE: $
1949 CODE:
1950 LOCK;
1951 SvREFCNT_dec (coro_readyhook);
1952 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1953 UNLOCK;
1224 1954
1225int 1955int
1226prio (Coro::State coro, int newprio = 0) 1956prio (Coro::State coro, int newprio = 0)
1227 ALIAS: 1957 ALIAS:
1228 nice = 1 1958 nice = 1
… …
1231 RETVAL = coro->prio; 1961 RETVAL = coro->prio;
1232 1962
1233 if (items > 1) 1963 if (items > 1)
1234 { 1964 {
1235 if (ix) 1965 if (ix)
1236 newprio += coro->prio; 1966 newprio = coro->prio - newprio;
1237 1967
1238 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 1968 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1239 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 1969 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1240 1970
1241 coro->prio = newprio; 1971 coro->prio = newprio;
1242 } 1972 }
1243} 1973}
1974 OUTPUT:
1975 RETVAL
1244 1976
1245void 1977SV *
1246ready (SV *self) 1978ready (SV *self)
1247 PROTOTYPE: $ 1979 PROTOTYPE: $
1248 CODE: 1980 CODE:
1249 api_ready (self); 1981 RETVAL = boolSV (api_ready (self));
1982 OUTPUT:
1983 RETVAL
1250 1984
1251int 1985int
1252nready (...) 1986nready (...)
1253 PROTOTYPE: 1987 PROTOTYPE:
1254 CODE: 1988 CODE:
1255 RETVAL = coro_nready; 1989 RETVAL = coro_nready;
1256 OUTPUT: 1990 OUTPUT:
1257 RETVAL 1991 RETVAL
1258 1992
1993void
1994throw (Coro::State self, SV *throw = &PL_sv_undef)
1995 PROTOTYPE: $;$
1996 CODE:
1997 SvREFCNT_dec (self->throw);
1998 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1999
2000void
2001swap_defsv (Coro::State self)
2002 PROTOTYPE: $
2003 ALIAS:
2004 swap_defav = 1
2005 CODE:
2006 if (!self->slot)
2007 croak ("cannot swap state with coroutine that has no saved state");
2008 else
2009 {
2010 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2011 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2012
2013 SV *tmp = *src; *src = *dst; *dst = tmp;
2014 }
2015
2016# for async_pool speedup
2017void
2018_pool_1 (SV *cb)
2019 CODE:
2020{
2021 struct coro *coro = SvSTATE (coro_current);
2022 HV *hv = (HV *)SvRV (coro_current);
2023 AV *defav = GvAV (PL_defgv);
2024 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2025 AV *invoke_av;
2026 int i, len;
2027
2028 if (!invoke)
2029 {
2030 SV *old = PL_diehook;
2031 PL_diehook = 0;
2032 SvREFCNT_dec (old);
2033 croak ("\3async_pool terminate\2\n");
2034 }
2035
2036 SvREFCNT_dec (coro->saved_deffh);
2037 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2038
2039 hv_store (hv, "desc", sizeof ("desc") - 1,
2040 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2041
2042 invoke_av = (AV *)SvRV (invoke);
2043 len = av_len (invoke_av);
2044
2045 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2046
2047 if (len > 0)
2048 {
2049 av_fill (defav, len - 1);
2050 for (i = 0; i < len; ++i)
2051 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2052 }
2053
2054 SvREFCNT_dec (invoke);
2055}
2056
2057void
2058_pool_2 (SV *cb)
2059 CODE:
2060{
2061 struct coro *coro = SvSTATE (coro_current);
2062
2063 sv_setsv (cb, &PL_sv_undef);
2064
2065 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2066 coro->saved_deffh = 0;
2067
2068 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2069 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2070 {
2071 SV *old = PL_diehook;
2072 PL_diehook = 0;
2073 SvREFCNT_dec (old);
2074 croak ("\3async_pool terminate\2\n");
2075 }
2076
2077 av_clear (GvAV (PL_defgv));
2078 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2079 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2080
2081 coro->prio = 0;
2082
2083 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2084 api_trace (coro_current, 0);
2085
2086 av_push (av_async_pool, newSVsv (coro_current));
2087}
2088
2089
1259MODULE = Coro::State PACKAGE = Coro::AIO 2090MODULE = Coro::State PACKAGE = Coro::AIO
1260 2091
1261SV * 2092SV *
1262_get_state () 2093_get_state ()
1263 CODE: 2094 CODE:
1264{ 2095{
1265 struct { 2096 struct io_state *data;
1266 int errorno;
1267 int laststype;
1268 int laststatval;
1269 Stat_t statcache;
1270 } data;
1271 2097
2098 RETVAL = newSV (sizeof (struct io_state));
2099 data = (struct io_state *)SvPVX (RETVAL);
2100 SvCUR_set (RETVAL, sizeof (struct io_state));
2101 SvPOK_only (RETVAL);
2102
1272 data.errorno = errno; 2103 data->errorno = errno;
1273 data.laststype = PL_laststype; 2104 data->laststype = PL_laststype;
1274 data.laststatval = PL_laststatval; 2105 data->laststatval = PL_laststatval;
1275 data.statcache = PL_statcache; 2106 data->statcache = PL_statcache;
1276
1277 RETVAL = newSVpvn ((char *)&data, sizeof data);
1278} 2107}
1279 OUTPUT: 2108 OUTPUT:
1280 RETVAL 2109 RETVAL
1281 2110
1282void 2111void
1283_set_state (char *data_) 2112_set_state (char *data_)
1284 PROTOTYPE: $ 2113 PROTOTYPE: $
1285 CODE: 2114 CODE:
1286{ 2115{
1287 struct { 2116 struct io_state *data = (void *)data_;
1288 int errorno;
1289 int laststype;
1290 int laststatval;
1291 Stat_t statcache;
1292 } *data = (void *)data_;
1293 2117
1294 errno = data->errorno; 2118 errno = data->errorno;
1295 PL_laststype = data->laststype; 2119 PL_laststype = data->laststype;
1296 PL_laststatval = data->laststatval; 2120 PL_laststatval = data->laststatval;
1297 PL_statcache = data->statcache; 2121 PL_statcache = data->statcache;
1298} 2122}
2123
2124
2125MODULE = Coro::State PACKAGE = Coro::AnyEvent
2126
2127BOOT:
2128 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2129
2130SV *
2131_schedule (...)
2132 PROTOTYPE: @
2133 CODE:
2134{
2135 static int incede;
2136
2137 api_cede_notself ();
2138
2139 ++incede;
2140 while (coro_nready >= incede && api_cede ())
2141 ;
2142
2143 sv_setsv (sv_activity, &PL_sv_undef);
2144 if (coro_nready >= incede)
2145 {
2146 PUSHMARK (SP);
2147 PUTBACK;
2148 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2149 SPAGAIN;
2150 }
2151
2152 --incede;
2153}
2154

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